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authorUlrich Müller <ulm@gentoo.org>2018-05-01 00:26:39 +0200
committerUlrich Müller <ulm@gentoo.org>2018-05-01 00:26:39 +0200
commitb8edb053447c3d2c9cacfc9cb5d6632ecaa36f20 (patch)
tree00710923c0b6789c377bcce564c310601f01810d /7/pms.html
parentEAPI 6 has been reapproved by the Council. (diff)
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+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<!--http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd-->
+<html xmlns="http://www.w3.org/1999/xhtml"
+>
+<head><title>Package Manager Specification</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+<meta name="generator" content="TeX4ht (http://www.tug.org/tex4ht/)" />
+<meta name="originator" content="TeX4ht (http://www.tug.org/tex4ht/)" />
+<!-- xhtml,fn-in,html -->
+<meta name="src" content="pms.tex" />
+<link rel="stylesheet" type="text/css" href="pms.css" />
+</head><body
+>
+<div class="maketitle">
+
+
+
+<h2 class="titleHead">Package Manager Specification</h2>
+ <div class="author" ><span
+class="ecrm-1200">Stephen P. Bennett</span>
+<br /> <a
+href="mailto:spb@exherbo.org" ><span
+class="ecrm-1200">spb@exherbo.org</span></a> <br class="and" /><span
+class="ecrm-1200">Christian Faulhammer</span>
+<br /> <a
+href="mailto:fauli@gentoo.org" ><span
+class="ecrm-1200">fauli@gentoo.org</span></a> <br class="and" /><span
+class="ecrm-1200">Ciaran McCreesh</span>
+<br /> <a
+href="mailto:ciaran.mccreesh@googlemail.com" ><span
+class="ecrm-1200">ciaran.mccreesh@googlemail.com</span></a> <br class="and" /><span
+class="ecrm-1200">Ulrich M&uuml;ller</span>
+<br /> <a
+href="mailto:ulm@gentoo.org" ><span
+class="ecrm-1200">ulm@gentoo.org</span></a> </div>
+<br />
+<div class="date" ><span
+class="ecrm-1200">30th&#x00A0;April&#x00A0;2018</span></div>
+
+
+</div>
+<!--l. 34--><p class="noindent" ><span
+class="ecrm-0900">The bulk of this document is </span><span
+class="cmsy-9">&copy; </span><span
+class="ecrm-0900">2007&#8211;2018 Stephen Bennett, Christian Faulhammer, Ciaran McCreesh and</span>
+<span
+class="ecrm-0900">Ulrich M&uuml;ller. Contributions are owned by their respective authors, and may have been changed</span>
+<span
+class="ecrm-0900">substantially before inclusion.</span>
+</p><!--l. 38--><p class="noindent" ><span
+class="ecrm-0900">This document is released under the Creative Commons Attribution-ShareAlike 3.0 Licence. The full text</span>
+<span
+class="ecrm-0900">of this licence can be found at </span><a
+href="http://creativecommons.org/licenses/by-sa/3.0/" class="url" ><span
+class="ectt-0900">http://creativecommons.org/licenses/by-sa/3.0/</span></a><span
+class="ecrm-0900">.</span>
+</p><!--l. 41--><p class="noindent" ><span
+class="ecrm-0900">This version corresponds to commit 78bf8ab.</span>
+
+
+</p>
+<h2 class="likechapterHead"><a
+ id="x1-1000"></a>Contents</h2>
+<div class="tableofcontents">
+<span class="chapterToc" >1 <a
+href="#x1-50001" id="QQ2-1-5">Introduction</a></span>
+<br />&#x00A0;<span class="sectionToc" >1.1 <a
+href="#x1-60001.1" id="QQ2-1-6">Aims and Motivation</a></span>
+<br />&#x00A0;<span class="sectionToc" >1.2 <a
+href="#x1-70001.2" id="QQ2-1-7">Rationale</a></span>
+<br />&#x00A0;<span class="sectionToc" >1.3 <a
+href="#x1-80001.3" id="QQ2-1-8">Reporting Issues</a></span>
+<br />&#x00A0;<span class="sectionToc" >1.4 <a
+href="#x1-90001.4" id="QQ2-1-9">Conventions</a></span>
+<br />&#x00A0;<span class="sectionToc" >1.5 <a
+href="#x1-100001.5" id="QQ2-1-10">Acknowledgements</a></span>
+<br /><span class="chapterToc" >2 <a
+href="#x1-110002" id="QQ2-1-11">EAPIs</a></span>
+<br />&#x00A0;<span class="sectionToc" >2.1 <a
+href="#x1-120002.1" id="QQ2-1-12">Definition</a></span>
+<br />&#x00A0;<span class="sectionToc" >2.2 <a
+href="#x1-130002.2" id="QQ2-1-13">Defined EAPIs</a></span>
+<br />&#x00A0;<span class="sectionToc" >2.3 <a
+href="#x1-140002.3" id="QQ2-1-14">Reserved EAPIs</a></span>
+<br /><span class="chapterToc" >3 <a
+href="#x1-150003" id="QQ2-1-15">Names and Versions</a></span>
+<br />&#x00A0;<span class="sectionToc" >3.1 <a
+href="#x1-160003.1" id="QQ2-1-16">Restrictions upon Names</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.1 <a
+href="#x1-170003.1.1" id="QQ2-1-17">Category names</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.2 <a
+href="#x1-180003.1.2" id="QQ2-1-18">Package names</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.3 <a
+href="#x1-190003.1.3" id="QQ2-1-19">Slot names</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.4 <a
+href="#x1-200003.1.4" id="QQ2-1-20">USE flag names</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.5 <a
+href="#x1-210003.1.5" id="QQ2-1-21">Repository names</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.6 <a
+href="#x1-220003.1.6" id="QQ2-1-22">License names</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.7 <a
+href="#x1-230003.1.7" id="QQ2-1-23">Keyword names</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.8 <a
+href="#x1-240003.1.8" id="QQ2-1-24">EAPI names</a></span>
+<br />&#x00A0;<span class="sectionToc" >3.2 <a
+href="#x1-250003.2" id="QQ2-1-25">Version Specifications</a></span>
+<br />&#x00A0;<span class="sectionToc" >3.3 <a
+href="#x1-260003.3" id="QQ2-1-26">Version Comparison</a></span>
+<br />&#x00A0;<span class="sectionToc" >3.4 <a
+href="#x1-270003.4" id="QQ2-1-34">Uniqueness of Versions</a></span>
+<br /><span class="chapterToc" >4 <a
+href="#x1-280004" id="QQ2-1-35">Tree Layout</a></span>
+<br />&#x00A0;<span class="sectionToc" >4.1 <a
+href="#x1-290004.1" id="QQ2-1-36">Top Level</a></span>
+<br />&#x00A0;<span class="sectionToc" >4.2 <a
+href="#x1-300004.2" id="QQ2-1-37">Category Directories</a></span>
+<br />&#x00A0;<span class="sectionToc" >4.3 <a
+href="#x1-310004.3" id="QQ2-1-38">Package Directories</a></span>
+<br />&#x00A0;<span class="sectionToc" >4.4 <a
+href="#x1-320004.4" id="QQ2-1-39">The Profiles Directory</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >4.4.1 <a
+href="#x1-330004.4.1" id="QQ2-1-41">The profiles.desc file</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >4.4.2 <a
+href="#x1-340004.4.2" id="QQ2-1-42">The thirdpartymirrors file</a></span>
+
+
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >4.4.3 <a
+href="#x1-350004.4.3" id="QQ2-1-43">use.desc and related files</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >4.4.4 <a
+href="#x1-360004.4.4" id="QQ2-1-44">The updates directory</a></span>
+<br />&#x00A0;<span class="sectionToc" >4.5 <a
+href="#x1-370004.5" id="QQ2-1-45">The Licenses Directory</a></span>
+<br />&#x00A0;<span class="sectionToc" >4.6 <a
+href="#x1-380004.6" id="QQ2-1-46">The Eclass Directory</a></span>
+<br />&#x00A0;<span class="sectionToc" >4.7 <a
+href="#x1-390004.7" id="QQ2-1-47">The Metadata Directory</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >4.7.1 <a
+href="#x1-400004.7.1" id="QQ2-1-48">The metadata cache</a></span>
+<br /><span class="chapterToc" >5 <a
+href="#x1-410005" id="QQ2-1-49">Profiles</a></span>
+<br />&#x00A0;<span class="sectionToc" >5.1 <a
+href="#x1-420005.1" id="QQ2-1-50">General Principles</a></span>
+<br />&#x00A0;<span class="sectionToc" >5.2 <a
+href="#x1-430005.2" id="QQ2-1-51">Files That Make up a Profile</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.1 <a
+href="#x1-440005.2.1" id="QQ2-1-52">The parent file</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.2 <a
+href="#x1-450005.2.2" id="QQ2-1-53">The eapi file</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.3 <a
+href="#x1-460005.2.3" id="QQ2-1-54">deprecated</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.4 <a
+href="#x1-470005.2.4" id="QQ2-1-55">make.defaults</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.5 <a
+href="#x1-480005.2.5" id="QQ2-1-56">Simple line-based files</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.6 <a
+href="#x1-490005.2.6" id="QQ2-1-58">packages</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.7 <a
+href="#x1-500005.2.7" id="QQ2-1-59">packages.build</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.8 <a
+href="#x1-510005.2.8" id="QQ2-1-60">package.mask</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.9 <a
+href="#x1-520005.2.9" id="QQ2-1-61">package.provided</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.10 <a
+href="#x1-530005.2.10" id="QQ2-1-63">package.use</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.11 <a
+href="#x1-540005.2.11" id="QQ2-1-64">USE masking and forcing</a></span>
+<br />&#x00A0;<span class="sectionToc" >5.3 <a
+href="#x1-550005.3" id="QQ2-1-67">Profile Variables</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.3.1 <a
+href="#x1-560005.3.1" id="QQ2-1-68">Incremental variables</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.3.2 <a
+href="#x1-570005.3.2" id="QQ2-1-71">Specific variables and their meanings</a></span>
+<br /><span class="chapterToc" >6 <a
+href="#x1-580006" id="QQ2-1-72">Ebuild File Format</a></span>
+<br /><span class="chapterToc" >7 <a
+href="#x1-590007" id="QQ2-1-74">Ebuild-defined Variables</a></span>
+<br />&#x00A0;<span class="sectionToc" >7.1 <a
+href="#x1-600007.1" id="QQ2-1-75">Metadata Invariance</a></span>
+<br />&#x00A0;<span class="sectionToc" >7.2 <a
+href="#x1-610007.2" id="QQ2-1-76">Mandatory Ebuild-defined Variables</a></span>
+<br />&#x00A0;<span class="sectionToc" >7.3 <a
+href="#x1-620007.3" id="QQ2-1-77">Optional Ebuild-defined Variables</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >7.3.1 <a
+href="#x1-630007.3.1" id="QQ2-1-80">EAPI</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >7.3.2 <a
+href="#x1-640007.3.2" id="QQ2-1-81">Keywords</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >7.3.3 <a
+href="#x1-650007.3.3" id="QQ2-1-82">RDEPEND value</a></span>
+<br />&#x00A0;<span class="sectionToc" >7.4 <a
+href="#x1-660007.4" id="QQ2-1-84">Magic Ebuild-defined Variables</a></span>
+<br /><span class="chapterToc" >8 <a
+href="#x1-670008" id="QQ2-1-86">Dependencies</a></span>
+<br />&#x00A0;<span class="sectionToc" >8.1 <a
+href="#x1-680008.1" id="QQ2-1-87">Dependency Classes</a></span>
+<br />&#x00A0;<span class="sectionToc" >8.2 <a
+href="#x1-690008.2" id="QQ2-1-91">Dependency Specification Format</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.1 <a
+href="#x1-700008.2.1" id="QQ2-1-94">All-of dependency specifications</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.2 <a
+href="#x1-710008.2.2" id="QQ2-1-95">USE-conditional dependency specifications</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.3 <a
+href="#x1-720008.2.3" id="QQ2-1-96">Any-of dependency specifications</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.4 <a
+href="#x1-730008.2.4" id="QQ2-1-97">Exactly-one-of dependency specifications</a></span>
+
+
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.5 <a
+href="#x1-740008.2.5" id="QQ2-1-99">At-most-one-of dependency specifications</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.6 <a
+href="#x1-750008.2.6" id="QQ2-1-100">Package dependency specifications</a></span>
+<br />&#x00A0;&#x00A0;&#x00A0;<span class="subsubsectionToc" >8.2.6.1 <a
+href="#x1-760008.2.6.1" id="QQ2-1-103">Operators</a></span>
+<br />&#x00A0;&#x00A0;&#x00A0;<span class="subsubsectionToc" >8.2.6.2 <a
+href="#x1-770008.2.6.2" id="QQ2-1-104">Block operator</a></span>
+<br />&#x00A0;&#x00A0;&#x00A0;<span class="subsubsectionToc" >8.2.6.3 <a
+href="#x1-780008.2.6.3" id="QQ2-1-106">Slot dependencies</a></span>
+<br />&#x00A0;&#x00A0;&#x00A0;<span class="subsubsectionToc" >8.2.6.4 <a
+href="#x1-790008.2.6.4" id="QQ2-1-107">2-style and 4-style USE dependencies</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.7 <a
+href="#x1-800008.2.7" id="QQ2-1-108">USE state constraints</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.8 <a
+href="#x1-810008.2.8" id="QQ2-1-109">Restrict</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.9 <a
+href="#x1-820008.2.9" id="QQ2-1-110">Properties</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.10 <a
+href="#x1-830008.2.10" id="QQ2-1-111">SRC_URI</a></span>
+<br /><span class="chapterToc" >9 <a
+href="#x1-840009" id="QQ2-1-112">Ebuild-defined Functions</a></span>
+<br />&#x00A0;<span class="sectionToc" >9.1 <a
+href="#x1-850009.1" id="QQ2-1-113">List of Functions</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.1 <a
+href="#x1-860009.1.1" id="QQ2-1-114">Initial working directories</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.2 <a
+href="#x1-870009.1.2" id="QQ2-1-116">pkg_pretend</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.3 <a
+href="#x1-880009.1.3" id="QQ2-1-118">pkg_setup</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.4 <a
+href="#x1-890009.1.4" id="QQ2-1-119">src_unpack</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.5 <a
+href="#x1-900009.1.5" id="QQ2-1-121">src_prepare</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.6 <a
+href="#x1-910009.1.6" id="QQ2-1-124">src_configure</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.7 <a
+href="#x1-920009.1.7" id="QQ2-1-127">src_compile</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.8 <a
+href="#x1-930009.1.8" id="QQ2-1-132">src_test</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.9 <a
+href="#x1-940009.1.9" id="QQ2-1-134">src_install</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.10 <a
+href="#x1-950009.1.10" id="QQ2-1-138">pkg_preinst</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.11 <a
+href="#x1-960009.1.11" id="QQ2-1-139">pkg_postinst</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.12 <a
+href="#x1-970009.1.12" id="QQ2-1-140">pkg_prerm</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.13 <a
+href="#x1-980009.1.13" id="QQ2-1-141">pkg_postrm</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.14 <a
+href="#x1-990009.1.14" id="QQ2-1-142">pkg_config</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.15 <a
+href="#x1-1000009.1.15" id="QQ2-1-143">pkg_info</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.16 <a
+href="#x1-1010009.1.16" id="QQ2-1-145">pkg_nofetch</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.17 <a
+href="#x1-1020009.1.17" id="QQ2-1-146">Default phase functions</a></span>
+<br />&#x00A0;<span class="sectionToc" >9.2 <a
+href="#x1-1030009.2" id="QQ2-1-148">Call Order</a></span>
+<br /><span class="chapterToc" >10 <a
+href="#x1-10400010" id="QQ2-1-149">Eclasses</a></span>
+<br />&#x00A0;<span class="sectionToc" >10.1 <a
+href="#x1-10500010.1" id="QQ2-1-150">The inherit Command</a></span>
+<br />&#x00A0;<span class="sectionToc" >10.2 <a
+href="#x1-10600010.2" id="QQ2-1-151">Eclass-defined Metadata Keys</a></span>
+<br />&#x00A0;<span class="sectionToc" >10.3 <a
+href="#x1-10700010.3" id="QQ2-1-152">EXPORT_FUNCTIONS</a></span>
+<br /><span class="chapterToc" >11 <a
+href="#x1-10800011" id="QQ2-1-154">The Ebuild Environment</a></span>
+<br />&#x00A0;<span class="sectionToc" >11.1 <a
+href="#x1-10900011.1" id="QQ2-1-155">Defined Variables</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >11.1.1 <a
+href="#x1-11000011.1.1" id="QQ2-1-161">USE and IUSE handling</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >11.1.2 <a
+href="#x1-11100011.1.2" id="QQ2-1-162">REPLACING_VERSIONS and REPLACED_BY_VERSION</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >11.1.3 <a
+href="#x1-11200011.1.3" id="QQ2-1-163">Offset-prefix variables</a></span>
+
+
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >11.1.4 <a
+href="#x1-11300011.1.4" id="QQ2-1-165">Path variables and trailing slash</a></span>
+<br />&#x00A0;<span class="sectionToc" >11.2 <a
+href="#x1-11400011.2" id="QQ2-1-167">The State of Variables Between Functions</a></span>
+<br />&#x00A0;<span class="sectionToc" >11.3 <a
+href="#x1-11500011.3" id="QQ2-1-169">The State of the System Between Functions</a></span>
+<br /><span class="chapterToc" >12 <a
+href="#x1-11600012" id="QQ2-1-170">Available Commands</a></span>
+<br />&#x00A0;<span class="sectionToc" >12.1 <a
+href="#x1-11700012.1" id="QQ2-1-171">System Commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.1.1 <a
+href="#x1-11800012.1.1" id="QQ2-1-172">Guaranteed system commands</a></span>
+<br />&#x00A0;<span class="sectionToc" >12.2 <a
+href="#x1-11900012.2" id="QQ2-1-174">Commands Provided by Package Dependencies</a></span>
+<br />&#x00A0;<span class="sectionToc" >12.3 <a
+href="#x1-12000012.3" id="QQ2-1-175">Ebuild-specific Commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.1 <a
+href="#x1-12100012.3.1" id="QQ2-1-176">Failure behaviour and related commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.2 <a
+href="#x1-12200012.3.2" id="QQ2-1-178">Banned commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.3 <a
+href="#x1-12300012.3.3" id="QQ2-1-180">Sandbox commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.4 <a
+href="#x1-12400012.3.4" id="QQ2-1-181">Package manager query commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.5 <a
+href="#x1-12500012.3.5" id="QQ2-1-183">Output commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.6 <a
+href="#x1-12600012.3.6" id="QQ2-1-185">Error commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.7 <a
+href="#x1-12700012.3.7" id="QQ2-1-187">Patch commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.8 <a
+href="#x1-12800012.3.8" id="QQ2-1-190">Build commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.9 <a
+href="#x1-12900012.3.9" id="QQ2-1-194">Installation commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.10 <a
+href="#x1-13000012.3.10" id="QQ2-1-202">Commands affecting install destinations</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.11 <a
+href="#x1-13100012.3.11" id="QQ2-1-203">Commands controlling manipulation of files in the staging area</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.12 <a
+href="#x1-13200012.3.12" id="QQ2-1-205">USE list functions</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.13 <a
+href="#x1-13300012.3.13" id="QQ2-1-209">Text list functions</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.14 <a
+href="#x1-13400012.3.14" id="QQ2-1-210">Version manipulation and comparison commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.15 <a
+href="#x1-13500012.3.15" id="QQ2-1-212">Misc commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.16 <a
+href="#x1-13600012.3.16" id="QQ2-1-218">Debug commands</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.17 <a
+href="#x1-13700012.3.17" id="QQ2-1-219">Reserved commands and variables</a></span>
+<br /><span class="chapterToc" >13 <a
+href="#x1-13800013" id="QQ2-1-220">Merging and Unmerging</a></span>
+<br />&#x00A0;<span class="sectionToc" >13.1 <a
+href="#x1-13900013.1" id="QQ2-1-221">Overview</a></span>
+<br />&#x00A0;<span class="sectionToc" >13.2 <a
+href="#x1-14000013.2" id="QQ2-1-222">Directories</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >13.2.1 <a
+href="#x1-14100013.2.1" id="QQ2-1-223">Permissions</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >13.2.2 <a
+href="#x1-14200013.2.2" id="QQ2-1-224">Empty directories</a></span>
+<br />&#x00A0;<span class="sectionToc" >13.3 <a
+href="#x1-14300013.3" id="QQ2-1-225">Regular Files</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >13.3.1 <a
+href="#x1-14400013.3.1" id="QQ2-1-226">Permissions</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >13.3.2 <a
+href="#x1-14500013.3.2" id="QQ2-1-227">File modification times</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >13.3.3 <a
+href="#x1-14600013.3.3" id="QQ2-1-229">Configuration file protection</a></span>
+<br />&#x00A0;<span class="sectionToc" >13.4 <a
+href="#x1-14700013.4" id="QQ2-1-230">Symlinks</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" >13.4.1 <a
+href="#x1-14800013.4.1" id="QQ2-1-231">Rewriting</a></span>
+<br />&#x00A0;<span class="sectionToc" >13.5 <a
+href="#x1-14900013.5" id="QQ2-1-232">Hard Links</a></span>
+<br />&#x00A0;<span class="sectionToc" >13.6 <a
+href="#x1-15000013.6" id="QQ2-1-233">Other Files</a></span>
+<br /><span class="chapterToc" >14 <a
+href="#x1-15100014" id="QQ2-1-234">Metadata Cache</a></span>
+
+
+<br />&#x00A0;<span class="sectionToc" >14.1 <a
+href="#x1-15200014.1" id="QQ2-1-235">Directory Contents</a></span>
+<br />&#x00A0;<span class="sectionToc" >14.2 <a
+href="#x1-15300014.2" id="QQ2-1-236">Cache File Format</a></span>
+<br /><span class="chapterToc" >15 <a
+href="#x1-15400015" id="QQ2-1-237">Glossary</a></span>
+<br /><span class="chapterToc" > <a
+href="#Q1-1-239">Bibliography</a></span>
+<br /><span class="appendixToc" >A <a
+href="#x1-156000A" id="QQ2-1-240">metadata.xml</a></span>
+<br /><span class="appendixToc" >B <a
+href="#x1-157000B" id="QQ2-1-241">Unspecified Items</a></span>
+<br /><span class="appendixToc" >C <a
+href="#x1-158000C" id="QQ2-1-242">Historical Curiosities</a></span>
+<br />&#x00A0;<span class="sectionToc" ><a
+href="#x1-159000C" id="QQ2-1-243">Long-obsolete Features</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" ><a
+href="#x1-160000C" id="QQ2-1-244">If-else USE blocks</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" ><a
+href="#x1-161000C" id="QQ2-1-246">CVS versions</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" ><a
+href="#x1-162000C" id="QQ2-1-247">use.defaults</a></span>
+<br />&#x00A0;<span class="sectionToc" ><a
+href="#x1-163000C" id="QQ2-1-248">Retroactive Changes</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" ><a
+href="#x1-164000C" id="QQ2-1-249">Bash version</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" ><a
+href="#x1-165000C" id="QQ2-1-250">Old-style virtuals</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" ><a
+href="#x1-166000C" id="QQ2-1-251">EAPI parsing</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" ><a
+href="#x1-167000C" id="QQ2-1-252">Package names</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" ><a
+href="#x1-168000C" id="QQ2-1-253">Asterisk in dependency specification</a></span>
+<br />&#x00A0;&#x00A0;<span class="subsectionToc" ><a
+href="#x1-169000C" id="QQ2-1-254">Empty dependency groups</a></span>
+<br /><span class="appendixToc" >D <a
+href="#x1-170000D" id="QQ2-1-255">Feature Availability by EAPI</a></span>
+<br /><span class="appendixToc" >E <a
+href="#x1-171000E" id="QQ2-1-257">Differences Between EAPIs</a></span>
+<br />&#x00A0;<span class="sectionToc" ><a
+href="#x1-172000E" id="QQ2-1-258">EAPI 0</a></span>
+<br />&#x00A0;<span class="sectionToc" ><a
+href="#x1-173000E" id="QQ2-1-259">EAPI 1</a></span>
+<br />&#x00A0;<span class="sectionToc" ><a
+href="#x1-174000E" id="QQ2-1-260">EAPI 2</a></span>
+<br />&#x00A0;<span class="sectionToc" ><a
+href="#x1-175000E" id="QQ2-1-261">EAPI 3</a></span>
+<br />&#x00A0;<span class="sectionToc" ><a
+href="#x1-176000E" id="QQ2-1-262">EAPI 4</a></span>
+<br />&#x00A0;<span class="sectionToc" ><a
+href="#x1-177000E" id="QQ2-1-263">EAPI 5</a></span>
+<br />&#x00A0;<span class="sectionToc" ><a
+href="#x1-178000E" id="QQ2-1-264">EAPI 6</a></span>
+<br />&#x00A0;<span class="sectionToc" ><a
+href="#x1-179000E" id="QQ2-1-265">EAPI 7</a></span>
+<br /><span class="appendixToc" >F <a
+href="#x1-180000F" id="QQ2-1-266">Desk Reference</a></span>
+</div>
+
+
+<h2 class="likechapterHead"><a
+ id="x1-2000"></a>List of Algorithms</h2>
+<div class="tableofcontents">
+3.1 <a
+href="#x1-26001r1">Version comparison top-level logic</a>
+<br />3.2 <a
+href="#x1-26008r2">Version comparison logic for numeric components</a>
+<br />3.3 <a
+href="#x1-26025r3">Version comparison logic for each numeric component after the first</a>
+<br />3.4 <a
+href="#x1-26041r4">Version comparison logic for letter components</a>
+<br />3.5 <a
+href="#x1-26049r5">Version comparison logic for suffixes</a>
+<br />3.6 <a
+href="#x1-26069r6">Version comparison logic for each suffix</a>
+<br />3.7 <a
+href="#x1-26083r7">Version comparison logic for revision components</a>
+<br />5.1 <a
+href="#x1-54002r1"><span
+class="ectt-1000">USE </span>masking logic</a>
+<br />12.1 <a
+href="#x1-127001r1"><span
+class="ectt-1000">eapply </span>logic</a>
+<br />12.2 <a
+href="#x1-128002r2"><span
+class="ectt-1000">econf --libdir </span>logic</a>
+<br />12.3 <a
+href="#x1-129001r3">Determining the library directory</a>
+<br />12.4 <a
+href="#x1-135003r4"><span
+class="ectt-1000">einstalldocs </span>logic</a>
+<br />12.5 <a
+href="#x1-135025r5"><span
+class="ectt-1000">get_libdir </span>logic</a>
+</div>
+
+
+<h2 class="likechapterHead"><a
+ id="x1-3000"></a>List of Listings</h2>
+<div class="tableofcontents">
+9.1 <a
+href="#x1-89001r1"><span
+class="ectt-1000">src_unpack</span></a>
+<br />9.2 <a
+href="#x1-90001r2"><span
+class="ectt-1000">src_prepare</span>, format&#x00A0;6</a>
+<br />9.3 <a
+href="#x1-91001r3"><span
+class="ectt-1000">src_configure</span></a>
+<br />9.4 <a
+href="#x1-92001r4"><span
+class="ectt-1000">src_compile</span>, format&#x00A0;0</a>
+<br />9.5 <a
+href="#x1-92002r5"><span
+class="ectt-1000">src_compile</span>, format&#x00A0;1</a>
+<br />9.6 <a
+href="#x1-92003r6"><span
+class="ectt-1000">src_compile</span>, format&#x00A0;2</a>
+<br />9.7 <a
+href="#x1-94001r7"><span
+class="ectt-1000">src_install</span>, format&#x00A0;4</a>
+<br />9.8 <a
+href="#x1-94002r8"><span
+class="ectt-1000">src_install</span>, format&#x00A0;6</a>
+<br />10.1 <a
+href="#x1-107001r1"><span
+class="ectt-1000">EXPORT_FUNCTIONS </span>example: <span
+class="ectt-1000">foo.eclass</span></a>
+<br />11.1 <a
+href="#x1-114001r1">Environment state between functions</a>
+<br />12.1 <a
+href="#x1-128017r1"><span
+class="ectt-1000">einstall </span>command</a>
+<br />C.1 <a
+href="#x1-160001r1">If-else use blocks</a>
+</div>
+
+
+<h2 class="likechapterHead"><a
+ id="x1-4000"></a>List of Tables</h2>
+<div class="tableofcontents"><span class="lotToc" >4.1&#x00A0;<a
+href="#x1-32001r1">EAPIs supporting a directory for <span
+class="ectt-1000">package.mask</span></a></span><br /><span class="lotToc" >5.1&#x00A0;<a
+href="#x1-48001r1">EAPIs supporting directories
+for profile files</a></span><br /><span class="lotToc" >5.2&#x00A0;<a
+href="#x1-52001r2">EAPIs supporting <span
+class="ectt-1000">package.provided </span>in profiles</a></span><br /><span class="lotToc" >5.3&#x00A0;<a
+href="#x1-54001r3">Profile directory
+support for masking/forcing use flags in stable versions only</a></span><br /><span class="lotToc" >5.4&#x00A0;<a
+href="#x1-56001r4">Profile-defined <span
+class="ectt-1000">IUSE</span>
+injection for EAPIs</a></span><br /><span class="lotToc" >5.5&#x00A0;<a
+href="#x1-56002r5">Profile-defined unsetting of variables in EAPIs</a></span><br /><span class="lotToc" >6.1&#x00A0;<a
+href="#x1-58001r1">Bash
+version and options</a></span><br /><span class="lotToc" >7.1&#x00A0;<a
+href="#x1-62001r1">EAPIs supporting <span
+class="ectt-1000">IUSE </span>defaults</a></span><br /><span class="lotToc" >7.2&#x00A0;<a
+href="#x1-62002r2">EAPIs supporting various
+ebuild-defined variables</a></span><br /><span class="lotToc" >7.3&#x00A0;<a
+href="#x1-65001r3">EAPIs with <span
+class="ectt-1000">RDEPEND=DEPEND </span>default</a></span><br /><span class="lotToc" >7.4&#x00A0;<a
+href="#x1-66001r4">EAPIs supporting
+<span
+class="ectt-1000">DEFINED_PHASES</span></a></span><br /><span class="lotToc" >8.1&#x00A0;<a
+href="#x1-68001r1">Dependency classes required to be satisfied for a particular phase
+function</a></span><br /><span class="lotToc" >8.2&#x00A0;<a
+href="#x1-68002r2">Summary of other interfaces related to dependency classes</a></span><br /><span class="lotToc" >8.3&#x00A0;<a
+href="#x1-68003r3">EAPIs
+supporting additional dependency types</a></span><br /><span class="lotToc" >8.4&#x00A0;<a
+href="#x1-69001r4">EAPIs supporting <span
+class="ectt-1000">SRC_URI </span>arrows</a></span><br /><span class="lotToc" >8.5&#x00A0;<a
+href="#x1-69002r5">EAPIs
+supporting <span
+class="ectt-1000">REQUIRED_USE ?? </span>groups</a></span><br /><span class="lotToc" >8.6&#x00A0;<a
+href="#x1-73001r6">Matching of empty dependency groups in
+EAPIs</a></span><br /><span class="lotToc" >8.7&#x00A0;<a
+href="#x1-75001r7">Support for <span
+class="ectt-1000">SLOT </span>dependencies and sub-slots in EAPIs</a></span><br /><span class="lotToc" >8.8&#x00A0;<a
+href="#x1-75002r8">EAPIs supporting
+<span
+class="ectt-1000">USE </span>dependencies</a></span><br /><span class="lotToc" >8.9&#x00A0;<a
+href="#x1-77001r9">Exclamation mark strengths for EAPIs</a></span><br /><span class="lotToc" >9.1&#x00A0;<a
+href="#x1-86001r1">EAPIs with <span
+class="ectt-1000">S </span>to
+<span
+class="ectt-1000">WORKDIR </span>fallbacks</a></span><br /><span class="lotToc" >9.2&#x00A0;<a
+href="#x1-87001r2">EAPIs supporting <span
+class="ectt-1000">pkg_pretend</span></a></span><br /><span class="lotToc" >9.3&#x00A0;<a
+href="#x1-90002r3"><span
+class="ectt-1000">src_prepare </span>support
+and behaviour for EAPIs</a></span><br /><span class="lotToc" >9.4&#x00A0;<a
+href="#x1-91002r4">EAPIs supporting <span
+class="ectt-1000">src_configure</span></a></span><br /><span class="lotToc" >9.5&#x00A0;<a
+href="#x1-92004r5"><span
+class="ectt-1000">src_compile</span>
+behaviour for EAPIs</a></span><br /><span class="lotToc" >9.6&#x00A0;<a
+href="#x1-93001r6"><span
+class="ectt-1000">src_test </span>behaviour for EAPIs</a></span><br /><span class="lotToc" >9.7&#x00A0;<a
+href="#x1-94003r7"><span
+class="ectt-1000">src_install </span>behaviour
+for EAPIs</a></span><br /><span class="lotToc" >9.8&#x00A0;<a
+href="#x1-100001r8">EAPIs supporting <span
+class="ectt-1000">pkg_info </span>on non-installed packages</a></span><br /><span class="lotToc" >9.9&#x00A0;<a
+href="#x1-102001r9">EAPIs
+supporting <span
+class="ectt-1000">default_ </span>phase functions</a></span><br /><span class="lotToc" >11.1&#x00A0;<a
+href="#x1-109002">Defined variables</a></span><br /><span class="lotToc" >11.2&#x00A0;<a
+href="#x1-109007r2">EAPIs
+supporting various added env variables</a></span><br /><span class="lotToc" >11.3&#x00A0;<a
+href="#x1-109008r3">EAPIs supporting various removed env
+variables</a></span><br /><span class="lotToc" >11.4&#x00A0;<a
+href="#x1-109009r4">EAPIs supporting offset-prefix env variables</a></span><br /><span class="lotToc" >11.5&#x00A0;<a
+href="#x1-109010r5">Locale settings for
+EAPIs</a></span><br /><span class="lotToc" >11.6&#x00A0;<a
+href="#x1-112001r6">EAPIs supporting offset-prefix</a></span><br /><span class="lotToc" >11.7&#x00A0;<a
+href="#x1-113001r7">Variables that always or never end
+with a trailing slash</a></span><br /><span class="lotToc" >12.1&#x00A0;<a
+href="#x1-118001r1">System commands for EAPIs</a></span><br /><span class="lotToc" >12.2&#x00A0;<a
+href="#x1-121001r2">EAPI command failure
+behaviour</a></span><br /><span class="lotToc" >12.3&#x00A0;<a
+href="#x1-122001r3">Banned commands</a></span><br /><span class="lotToc" >12.4&#x00A0;<a
+href="#x1-124001r4">Package manager query command options
+supported by EAPIs</a></span><br /><span class="lotToc" >12.5&#x00A0;<a
+href="#x1-125001r5">Output commands for EAPIs</a></span><br /><span class="lotToc" >12.6&#x00A0;<a
+href="#x1-126001r6">Properties of <span
+class="ectt-1000">die </span>and <span
+class="ectt-1000">assert</span>
+commands in EAPIs</a></span><br /><span class="lotToc" >12.7&#x00A0;<a
+href="#x1-127033r7">Patch commands for EAPIs</a></span><br /><span class="lotToc" >12.8&#x00A0;<a
+href="#x1-128001r8">Extra <span
+class="ectt-1000">econf </span>arguments
+for EAPIs</a></span><br /><span class="lotToc" >12.9&#x00A0;<a
+href="#x1-129018r9">EAPIs supporting <span
+class="ectt-1000">dodoc -r</span></a></span><br /><span class="lotToc" >12.10&#x00A0;<a
+href="#x1-129019r10">EAPIs supporting <span
+class="ectt-1000">doheader </span>and
+<span
+class="ectt-1000">newheader</span></a></span><br /><span class="lotToc" >12.11&#x00A0;<a
+href="#x1-129020r11">EAPIs supporting symlinks for <span
+class="ectt-1000">doins</span></a></span><br /><span class="lotToc" >12.12&#x00A0;<a
+href="#x1-129021r12"><span
+class="ectt-1000">doman </span>language support
+options for EAPIs</a></span><br /><span class="lotToc" >12.13&#x00A0;<a
+href="#x1-129022r13">EAPIs supporting stdin for <span
+class="ectt-1000">new* </span>commands</a></span><br /><span class="lotToc" >12.14&#x00A0;<a
+href="#x1-129023r14"><span
+class="ectt-1000">domo </span>destination
+path in EAPIs</a></span><br /><span class="lotToc" >12.15&#x00A0;<a
+href="#x1-131001r15">Commands controlling manipulation of files in the staging area
+in EAPIs</a></span><br /><span class="lotToc" >12.16&#x00A0;<a
+href="#x1-132001r16">EAPI behaviour for use queries not in <span
+class="ectt-1000">IUSE_EFFECTIVE</span></a></span><br /><span class="lotToc" >12.17&#x00A0;<a
+href="#x1-132002r17">EAPIs
+supporting empty third argument in <span
+class="ectt-1000">use_with </span>and <span
+class="ectt-1000">use_enable</span></a></span><br /><span class="lotToc" >12.18&#x00A0;<a
+href="#x1-132003r18">EAPIs supporting
+<span
+class="ectt-1000">usex </span>and <span
+class="ectt-1000">in_iuse</span></a></span><br /><span class="lotToc" >12.19&#x00A0;<a
+href="#x1-134001r19">EAPIs supporting version manipulation commands</a></span><br /><span class="lotToc" >12.20&#x00A0;<a
+href="#x1-135001r20"><span
+class="ectt-1000">unpack</span>
+behaviour for EAPIs</a></span><br /><span class="lotToc" >12.21&#x00A0;<a
+href="#x1-135002r21"><span
+class="ectt-1000">unpack </span>extensions for EAPIs</a></span><br /><span class="lotToc" >12.22&#x00A0;<a
+href="#x1-135034r22">Misc commands for
+EAPIs</a></span><br /><span class="lotToc" >13.1&#x00A0;<a
+href="#x1-145001r1">Preservation of file modification times (mtimes)</a></span><br /><span class="lotToc" >D.1&#x00A0;<a
+href="#x1-170002">Features in EAPIs</a></span><br />
+</div>
+
+
+
+
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;1</span><br /><a
+ id="x1-50001"></a>Introduction</h2>
+<h3 class="sectionHead"><span class="titlemark">1.1 </span> <a
+ id="x1-60001.1"></a>Aims and Motivation</h3>
+<!--l. 5--><p class="noindent" >This document aims to fully describe the format of an ebuild repository and the ebuilds therein,
+as well as certain aspects of package manager behaviour required to support such a
+repository.
+</p><!--l. 8--><p class="noindent" >This document is <span
+class="ecti-1000">not </span>designed to be an introduction to ebuild development. Prior knowledge of
+ebuild creation and an understanding of how the package management system works is assumed;
+certain less familiar terms are explained in the Glossary in chapter&#x00A0;<a
+href="#x1-15400015">15<!--tex4ht:ref: sec:glossary --></a>.
+</p><!--l. 12--><p class="noindent" >This document does not specify any user or package manager configuration information.
+</p><!--l. 14--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">1.2 </span> <a
+ id="x1-70001.2"></a>Rationale</h3>
+<!--l. 16--><p class="noindent" >At present the only definition of what an ebuild can assume about its environment,
+and the only definition of what is valid in an ebuild, is the source code of the latest
+Portage release and a general consensus about which features are too new to assume
+availability. This has several drawbacks: not only is it impossible to change any aspect of
+Portage behaviour without verifying that nothing in the tree relies upon it, but if a new
+package manager should appear it becomes impossible to fully support such an ill-defined
+standard.
+</p><!--l. 23--><p class="noindent" >This document aims to address both of these concerns by defining almost all aspects of what an
+ebuild repository looks like, and how an ebuild is allowed to behave. Thus, both Portage and other
+package managers can change aspects of their behaviour not defined here without worry of
+incompatibilities with any particular repository.
+</p><!--l. 28--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">1.3 </span> <a
+ id="x1-80001.3"></a>Reporting Issues</h3>
+<!--l. 30--><p class="noindent" >Issues (inaccuracies, wording problems, omissions etc.)&#x00A0;in this document should be reported via
+Gentoo Bugzilla using product <span
+class="ecti-1000">Gentoo Hosted Projects</span>, component <span
+class="ecti-1000">PMS/EAPI </span>and the default
+assignee. There should be one bug per issue, and one issue per bug.
+</p><!--l. 34--><p class="noindent" >Patches (in <span
+class="ectt-1000">git format-patch </span>form if possible) may be submitted either via Bugzilla or to the
+<a
+href="mailto:gentoo-pms@lists.gentoo.org" ><span
+class="ectt-1000">gentoo-pms@lists.gentoo.org</span></a> mailing list. Patches will be reviewed by the PMS team, who will
+do one of the following:
+</p><!--l. 39--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">Accept and apply the patch.
+ </li>
+ <li class="compactitem">Explain why the patch cannot be applied as-is. The patch may then be updated and
+ resubmitted if appropriate.
+ </li>
+ <li class="compactitem">Reject the patch outright.
+ </li>
+ <li class="compactitem">Take special action merited by the individual circumstances.</li></ul>
+
+
+<!--l. 46--><p class="noindent" >When reporting issues, remember that this document is not the appropriate place for pushing
+through changes to the tree or the package manager, except where those changes are
+bugs.
+</p><!--l. 49--><p class="noindent" >If any issue cannot be resolved by the PMS team, it may be escalated to the Gentoo
+Council.
+</p><!--l. 51--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">1.4 </span> <a
+ id="x1-90001.4"></a>Conventions</h3>
+<!--l. 53--><p class="noindent" >Text in <span
+class="ectt-1000">teletype </span>is used for filenames or variable names. <span
+class="ecti-1000">Italic </span>text is used for terms with a
+particular technical meaning in places where there may otherwise be ambiguity.
+</p><!--l. 56--><p class="noindent" >The term <span
+class="ecti-1000">package manager </span>is used throughout this document in a broad sense. Although some
+parts of this document are only relevant to fully featured package managers, many items are
+equally applicable to tools or other applications that interact with ebuilds or ebuild
+repositories.
+</p><!--l. 60--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">1.5 </span> <a
+ id="x1-100001.5"></a>Acknowledgements</h3>
+<!--l. 62--><p class="noindent" >Thanks to Mike Kelly (package manager provided utilities, section&#x00A0;<a
+href="#x1-12000012.3">12.3<!--tex4ht:ref: sec:pkg-mgr-commands --></a>), Danny van Dyk (ebuild
+functions, section&#x00A0;<a
+href="#x1-840009">9<!--tex4ht:ref: sec:ebuild-functions --></a>), David Leverton (various sections), Petteri R&auml;ty (environment state,
+section&#x00A0;<a
+href="#x1-11400011.2">11.2<!--tex4ht:ref: sec:ebuild-env-state --></a>), Micha&#322; G&oacute;rny (various sections), Andreas K. H&uuml;ttel (stable use masking,
+section&#x00A0;<a
+href="#x1-540005.2.11">5.2.11<!--tex4ht:ref: sec:use-masking --></a>), Zac Medico (sub-slots, section&#x00A0;<a
+href="#x1-610007.2">7.2<!--tex4ht:ref: sec:mandatory-vars --></a>) and James Le Cuirot (build dependencies,
+section&#x00A0;<a
+href="#x1-10900011.1">11.1<!--tex4ht:ref: sec:ebuild-env-vars --></a>) for contributions. Thanks also to Mike Frysinger and Brian Harring for proof-reading
+and suggestions for fixes and/or clarification.
+
+
+
+
+
+
+</p>
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;2</span><br /><a
+ id="x1-110002"></a>EAPIs</h2>
+<h3 class="sectionHead"><span class="titlemark">2.1 </span> <a
+ id="x1-120002.1"></a>Definition</h3>
+<!--l. 5--><p class="noindent" >An EAPI can be thought of as a &#8216;version&#8217; of this specification to which a package conforms. An
+EAPI value is a string as per section&#x00A0;<a
+href="#x1-240003.1.8">3.1.8<!--tex4ht:ref: sec:eapi-names --></a>, and is part of an ebuild&#8217;s metadata.
+</p><!--l. 8--><p class="noindent" >If a package manager encounters a package version with an unrecognised EAPI, it must not
+attempt to perform any operations upon it. It could, for example, ignore the package version
+entirely (although this can lead to user confusion), or it could mark the package version as masked.
+A package manager must not use any metadata generated from a package with an unrecognised
+EAPI.
+</p><!--l. 13--><p class="noindent" >The package manager must not attempt to perform any kind of comparison test other than
+equality upon EAPIs.
+</p><!--l. 16--><p class="noindent" >EAPIs are also used for profile directories, as described in section&#x00A0;<a
+href="#x1-450005.2.2">5.2.2<!--tex4ht:ref: sec:profile-eapi --></a>.
+</p><!--l. 18--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">2.2 </span> <a
+ id="x1-130002.2"></a>Defined EAPIs</h3>
+<!--l. 20--><p class="noindent" >The following EAPIs are defined by this specification:
+</p><!--l. 23--><p class="noindent" >
+ </p><dl class="compactdesc"><dt class="compactdesc">
+<span
+class="ecbx-1000">0</span> </dt><dd
+class="compactdesc">The &#8216;original&#8217; base EAPI.
+ </dd><dt class="compactdesc">
+<span
+class="ecbx-1000">1</span> </dt><dd
+class="compactdesc">EAPI &#8216;1&#8217; contains a number of extensions to EAPI &#8216;0&#8217;.
+ </dd><dt class="compactdesc">
+<span
+class="ecbx-1000">2</span> </dt><dd
+class="compactdesc">EAPI &#8216;2&#8217; contains a number of extensions to EAPI &#8216;1&#8217;.
+ </dd><dt class="compactdesc">
+<span
+class="ecbx-1000">3</span> </dt><dd
+class="compactdesc">EAPI &#8216;3&#8217; contains a number of extensions to EAPI &#8216;2&#8217;.
+ </dd><dt class="compactdesc">
+<span
+class="ecbx-1000">4</span> </dt><dd
+class="compactdesc">EAPI &#8216;4&#8217; contains a number of extensions to EAPI &#8216;3&#8217;.
+ </dd><dt class="compactdesc">
+<span
+class="ecbx-1000">5</span> </dt><dd
+class="compactdesc">EAPI &#8216;5&#8217; contains a number of extensions to EAPI &#8216;4&#8217;.
+ </dd><dt class="compactdesc">
+<span
+class="ecbx-1000">6</span> </dt><dd
+class="compactdesc">EAPI &#8216;6&#8217; contains a number of extensions to EAPI &#8216;5&#8217;.
+ </dd><dt class="compactdesc">
+<span
+class="ecbx-1000">7</span> </dt><dd
+class="compactdesc">EAPI &#8216;7&#8217; contains a number of extensions to EAPI &#8216;6&#8217;.</dd></dl>
+<!--l. 34--><p class="noindent" >Except where explicitly noted, everything in this specification applies to all of the above
+EAPIs.<span class="footnote-mark"><a
+href="#fn1x3" id="fn1x3-bk"><sup class="textsuperscript">1</sup></a></span><a
+ id="x1-13001f1"></a>
+</p><!--l. 40--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">2.3 </span> <a
+ id="x1-140002.3"></a>Reserved EAPIs</h3>
+<!--l. 43--><p class="noindent" >
+
+
+ </p><ul>
+ <li class="compactitem">EAPIs whose value consists purely of an integer are reserved for future versions of this
+ specification.
+ </li>
+ <li class="compactitem">EAPIs whose value starts with the string <span
+class="ectt-1000">paludis- </span>are reserved for experimental use
+ by the Paludis package manager.</li></ul>
+
+
+
+
+
+
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;3</span><br /><a
+ id="x1-150003"></a>Names and Versions</h2>
+<h3 class="sectionHead"><span class="titlemark">3.1 </span> <a
+ id="x1-160003.1"></a>Restrictions upon Names</h3>
+<!--l. 5--><p class="noindent" >No name may be empty. Package managers must not impose fixed upper boundaries upon the
+length of any name. A package manager should indicate or reject any name that is invalid
+according to these rules.
+</p><!--l. 8--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">3.1.1 </span> <a
+ id="x1-170003.1.1"></a>Category names</h4>
+<!--l. 9--><p class="noindent" >A category name may contain any of the characters [<span
+class="ectt-1000">A-Za-z0-9+_.-</span>]. It must not begin with a
+hyphen, a dot or a plus sign.
+</p><!--l. 13--><p class="noindent" >
+</p><dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>A hyphen is <span
+class="ecti-1000">not </span>required because of the <span
+class="ectt-1000">virtual </span>category. Usually, however, category
+names will contain a hyphen.</dd></dl>
+<!--l. 15--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">3.1.2 </span> <a
+ id="x1-180003.1.2"></a>Package names</h4>
+<!--l. 17--><p class="noindent" >A package name may contain any of the characters [<span
+class="ectt-1000">A-Za-z0-9+_-</span>]. It must not begin with a
+hyphen or a plus sign, and must not end in a hyphen followed by anything matching the version
+syntax described in section&#x00A0;<a
+href="#x1-250003.2">3.2<!--tex4ht:ref: sec:version-spec --></a>.
+</p><!--l. 22--><p class="noindent" >
+</p><dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>A package name does not include the category. The term <span
+class="ecti-1000">qualified package name </span>is
+used where a <span
+class="ectt-1000">category/package </span>pair is meant.</dd></dl>
+<!--l. 24--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">3.1.3 </span> <a
+ id="x1-190003.1.3"></a>Slot names</h4>
+<!--l. 26--><p class="noindent" >A slot name may contain any of the characters [<span
+class="ectt-1000">A-Za-z0-9+_.-</span>]. It must not begin with a hyphen,
+a dot or a plus sign.
+</p><!--l. 29--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">3.1.4 </span> <a
+ id="x1-200003.1.4"></a>USE flag names</h4>
+<!--l. 30--><p class="noindent" >A USE flag name may contain any of the characters [<span
+class="ectt-1000">A-Za-z0-9+_@-</span>]. It must begin with an
+alphanumeric character. Underscores should be considered reserved for <span
+class="ectt-1000">USE_EXPAND</span>, as described in
+section&#x00A0;<a
+href="#x1-11000011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a>.
+
+
+</p><!--l. 34--><p class="noindent" >
+</p><dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>Usage of the at-sign is deprecated. It was previously required for <span
+class="ectt-1000">LINGUAS</span>.</dd></dl>
+<!--l. 36--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">3.1.5 </span> <a
+ id="x1-210003.1.5"></a>Repository names</h4>
+<!--l. 38--><p class="noindent" >A repository name may contain any of the characters [<span
+class="ectt-1000">A-Za-z0-9_-</span>]. It must not begin with a
+hyphen. In addition, every repository name must also be a valid package name.
+</p><!--l. 41--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">3.1.6 </span> <a
+ id="x1-220003.1.6"></a>License names</h4>
+<!--l. 43--><p class="noindent" >A license name may contain any of the characters [<span
+class="ectt-1000">A-Za-z0-9+_.-</span>]. It must not begin with a
+hyphen, a dot or a plus sign.
+</p><!--l. 46--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">3.1.7 </span> <a
+ id="x1-230003.1.7"></a>Keyword names</h4>
+<!--l. 48--><p class="noindent" >A keyword name may contain any of the characters [<span
+class="ectt-1000">A-Za-z0-9_-</span>]. It must not begin with a
+hyphen. In contexts where it makes sense to do so, a keyword name may be prefixed by a tilde or a
+hyphen. In <span
+class="ectt-1000">KEYWORDS</span>, <span
+class="ectt-1000">-* </span>is also acceptable as a keyword.
+</p><!--l. 52--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">3.1.8 </span> <a
+ id="x1-240003.1.8"></a>EAPI names</h4>
+<!--l. 54--><p class="noindent" >An EAPI name may contain any of the characters [<span
+class="ectt-1000">A-Za-z0-9+_.-</span>]. It must not begin with a
+hyphen, a dot or a plus sign.
+</p><!--l. 57--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">3.2 </span> <a
+ id="x1-250003.2"></a>Version Specifications</h3>
+<!--l. 59--><p class="noindent" >The package manager must neither impose fixed limits upon the number of version components,
+nor upon the length of any component. Package managers should indicate or reject any version
+that is invalid according to the rules below.
+</p><!--l. 63--><p class="noindent" >A version starts with the number part, which is in the form <span
+class="ectt-1000">[0-9]+(\.[0-9]+)* </span>(an unsigned
+integer, followed by zero or more dot-prefixed unsigned integers).
+</p><!--l. 66--><p class="noindent" >This may optionally be followed by one of <span
+class="ectt-1000">[a-z] </span>(a lowercase letter).
+
+
+</p><!--l. 68--><p class="noindent" >This may be followed by zero or more of the suffixes <span
+class="ectt-1000">_alpha</span>, <span
+class="ectt-1000">_beta</span>, <span
+class="ectt-1000">_pre</span>, <span
+class="ectt-1000">_rc </span>or <span
+class="ectt-1000">_p</span>, each of which
+may optionally be followed by an unsigned integer. Suffix and integer count as separate version
+components.
+</p><!--l. 72--><p class="noindent" >This may optionally be followed by the suffix <span
+class="ectt-1000">-r </span>followed immediately by an unsigned integer (the
+&#8220;revision number&#8221;). If this suffix is not present, it is assumed to be <span
+class="ectt-1000">-r0</span>.
+</p><!--l. 75--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">3.3 </span> <a
+ id="x1-260003.3"></a>Version Comparison</h3>
+<!--l. 77--><p class="noindent" >Version specifications are compared component by component, moving from left to right, as
+detailed in algorithm&#x00A0;<a
+href="#x1-26001r1">3.1<!--tex4ht:ref: alg:version-comparison --></a> and sub-algorithms. If a sub-algorithm returns a decision, then that is
+the result of the whole comparison; if it terminates without returning a decision, the process
+continues from the point from which it was invoked.
+</p>
+<div class="algorithm">
+
+
+<!--l. 83--><p class="noindent" ><a
+ id="x1-26001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Algorithm 3.1: </span><span
+class="content">Version comparison top-level logic</span></div><!--tex4ht:label?: x1-26001r1 -->
+<div class="algorithmic">
+<a
+ id="x1-26002r1"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let <span
+class="cmmi-10">A </span>and <span
+class="cmmi-10">B </span>be the versions to be compared <a
+ id="x1-26003r2"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> compare numeric components using algorithm&#x00A0;<a
+href="#x1-26008r2">3.2<!--tex4ht:ref: alg:version-comparison-numeric --></a> <a
+ id="x1-26004r3"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> compare letter components using algorithm&#x00A0;<a
+href="#x1-26041r4">3.4<!--tex4ht:ref: alg:version-comparison-letter --></a> <a
+ id="x1-26005r4"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> compare suffixes using algorithm&#x00A0;<a
+href="#x1-26049r5">3.5<!--tex4ht:ref: alg:version-comparison-suffix --></a> <a
+ id="x1-26006r5"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> compare revision components using algorithm&#x00A0;<a
+href="#x1-26083r7">3.7<!--tex4ht:ref: alg:version-comparison-revision --></a> <a
+ id="x1-26007r6"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A </span><span
+class="cmr-10">= </span><span
+class="cmmi-10">B</span>
+</div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="algorithm">
+
+
+<!--l. 95--><p class="noindent" ><a
+ id="x1-26008r2"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Algorithm 3.2: </span><span
+class="content">Version comparison logic for numeric components</span></div><!--tex4ht:label?: x1-26008r2 -->
+<div class="algorithmic">
+<a
+ id="x1-26009r7"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> define the notations <span
+class="cmmi-10">An</span><sub><span
+class="cmmi-7">k</span></sub> and <span
+class="cmmi-10">Bn</span><sub><span
+class="cmmi-7">k</span></sub> to mean the <span
+class="cmmi-10">k</span><sup class="textsuperscript"><span
+class="ecrm-0900">th</span></sup> numeric component of <span
+class="cmmi-10">A </span>and <span
+class="cmmi-10">B</span>
+ respectively, using <span
+class="cmr-10">0</span>-based indexing <a
+ id="x1-26010r8"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">An</span><sub><span
+class="cmr-7">0</span></sub> <span
+class="cmmi-10">&#x003E; Bn</span><sub><span
+class="cmr-7">0</span></sub> using integer comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26011r9"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003E; B</span>
+ </span><a
+ id="x1-26012r10"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">An</span><sub><span
+class="cmr-7">0</span></sub> <span
+class="cmmi-10">&#x003C; Bn</span><sub><span
+class="cmr-7">0</span></sub> using integer comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26013r11"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003C; B</span>
+ </span><a
+ id="x1-26014r12"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-26015r13"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let <span
+class="cmmi-10">Ann </span>be the number of numeric components of <span
+class="cmmi-10">A</span> <a
+ id="x1-26016r14"></a>
+ <br /><span class="ALCitem">8:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let <span
+class="cmmi-10">Bnn </span>be the number of numeric components of <span
+class="cmmi-10">B</span> <a
+ id="x1-26017r15"></a>
+ <br /><span class="ALCitem">9:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">for all</span>&#x00A0;<span
+class="cmmi-10">i </span>such that <span
+class="cmmi-10">i </span><span
+class="cmsy-10">&#x2265; </span><span
+class="cmr-10">1 </span>and <span
+class="cmmi-10">i &#x003C; Ann </span>and <span
+class="cmmi-10">i &#x003C; Bnn</span>, in ascending order&#x00A0;<span
+class="ecbx-1000">do</span><span class="for-body">
+<a
+ id="x1-26018r16"></a>
+<br /><span class="ALCitem">10:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> compare <span
+class="cmmi-10">An</span><sub><span
+class="cmmi-7">i</span></sub> and <span
+class="cmmi-10">Bn</span><sub><span
+class="cmmi-7">i</span></sub> using algorithm&#x00A0;<a
+href="#x1-26025r3">3.3<!--tex4ht:ref: alg:version-comparison --></a>
+ </span><a
+ id="x1-26019r17"></a>
+<br /><span class="ALCitem">11:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">for</span><a
+ id="x1-26020r18"></a>
+<br /><span class="ALCitem">12:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">Ann &#x003E; Bnn</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26021r19"></a>
+<br /><span class="ALCitem">13:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003E; B</span>
+ </span><a
+ id="x1-26022r20"></a>
+<br /><span class="ALCitem">14:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">Ann &#x003C; Bnn</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26023r21"></a>
+<br /><span class="ALCitem">15:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003C; B</span>
+ </span><a
+ id="x1-26024r22"></a>
+<br /><span class="ALCitem">16:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+</div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="algorithm">
+
+
+<!--l. 118--><p class="noindent" ><a
+ id="x1-26025r3"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Algorithm 3.3: </span><span
+class="content">Version comparison logic for each numeric component after the first</span></div><!--tex4ht:label?: x1-26025r3 -->
+<div class="algorithmic">
+<a
+ id="x1-26026r23"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;either <span
+class="cmmi-10">An</span><sub><span
+class="cmmi-7">i</span></sub> or <span
+class="cmmi-10">Bn</span><sub><span
+class="cmmi-7">i</span></sub> has a leading <span
+class="ectt-1000">0</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26027r24"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let <span
+class="cmmi-10">An</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub> be <span
+class="cmmi-10">An</span><sub><span
+class="cmmi-7">i</span></sub> with any trailing <span
+class="ectt-1000">0</span>s removed <a
+ id="x1-26028r25"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let <span
+class="cmmi-10">Bn</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub> be <span
+class="cmmi-10">Bn</span><sub><span
+class="cmmi-7">i</span></sub> with any trailing <span
+class="ectt-1000">0</span>s removed <a
+ id="x1-26029r26"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">An</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub> <span
+class="cmmi-10">&#x003E; Bn</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub> using ASCII stringwise comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26030r27"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003E; B</span>
+ </span><a
+ id="x1-26031r28"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">An</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub> <span
+class="cmmi-10">&#x003C; Bn</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub> using ASCII stringwise comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26032r29"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003C; B</span>
+ </span><a
+ id="x1-26033r30"></a>
+ <br /><span class="ALCitem">8:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-26034r31"></a>
+ <br /><span class="ALCitem">9:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span><span class="else-body">
+<a
+ id="x1-26035r32"></a>
+<br /><span class="ALCitem">10:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">An</span><sub><span
+class="cmmi-7">i</span></sub> <span
+class="cmmi-10">&#x003E; Bn</span><sub><span
+class="cmmi-7">i</span></sub> using integer comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26036r33"></a>
+<br /><span class="ALCitem">11:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003E; B</span>
+ </span><a
+ id="x1-26037r34"></a>
+<br /><span class="ALCitem">12:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">An</span><sub><span
+class="cmmi-7">i</span></sub> <span
+class="cmmi-10">&#x003C; Bn</span><sub><span
+class="cmmi-7">i</span></sub> using integer comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26038r35"></a>
+<br /><span class="ALCitem">13:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003C; B</span>
+ </span><a
+ id="x1-26039r36"></a>
+<br /><span class="ALCitem">14:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-26040r37"></a>
+<br /><span class="ALCitem">15:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+</div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="algorithm">
+
+
+<!--l. 140--><p class="noindent" ><a
+ id="x1-26041r4"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Algorithm 3.4: </span><span
+class="content">Version comparison logic for letter components</span></div><!--tex4ht:label?: x1-26041r4 -->
+<div class="algorithmic">
+<a
+ id="x1-26042r38"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let <span
+class="cmmi-10">Al </span>be the letter component of <span
+class="cmmi-10">A </span>if any, otherwise the empty string <a
+ id="x1-26043r39"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let <span
+class="cmmi-10">Bl </span>be the letter component of <span
+class="cmmi-10">B </span>if any, otherwise the empty string <a
+ id="x1-26044r40"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">Al &#x003E; Bl </span>using ASCII stringwise comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26045r41"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003E; B</span>
+ </span><a
+ id="x1-26046r42"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">Al &#x003C; Bl </span>using ASCII stringwise comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26047r43"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003C; B</span>
+ </span><a
+ id="x1-26048r44"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+</div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="algorithm">
+
+
+<!--l. 153--><p class="noindent" ><a
+ id="x1-26049r5"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Algorithm 3.5: </span><span
+class="content">Version comparison logic for suffixes</span></div><!--tex4ht:label?: x1-26049r5 -->
+<div class="algorithmic">
+<a
+ id="x1-26050r45"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> define the notations <span
+class="cmmi-10">As</span><sub><span
+class="cmmi-7">k</span></sub> and <span
+class="cmmi-10">Bs</span><sub><span
+class="cmmi-7">k</span></sub> to mean the <span
+class="cmmi-10">k</span><sup class="textsuperscript"><span
+class="ecrm-0900">th</span></sup> suffix of <span
+class="cmmi-10">A </span>and <span
+class="cmmi-10">B </span>respectively, using
+ <span
+class="cmr-10">0</span>-based indexing <a
+ id="x1-26051r46"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let <span
+class="cmmi-10">Asn </span>be the number of suffixes of <span
+class="cmmi-10">A</span> <a
+ id="x1-26052r47"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let <span
+class="cmmi-10">Bsn </span>be the number of suffixes of <span
+class="cmmi-10">B</span> <a
+ id="x1-26053r48"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">for all</span>&#x00A0;<span
+class="cmmi-10">i </span>such that <span
+class="cmmi-10">i </span><span
+class="cmsy-10">&#x2265; </span><span
+class="cmr-10">0 </span>and <span
+class="cmmi-10">i &#x003C; Asn </span>and <span
+class="cmmi-10">i &#x003C; Bsn</span>, in ascending order&#x00A0;<span
+class="ecbx-1000">do</span><span class="for-body">
+<a
+ id="x1-26054r49"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> compare <span
+class="cmmi-10">As</span><sub><span
+class="cmmi-7">i</span></sub> and <span
+class="cmmi-10">Bs</span><sub><span
+class="cmmi-7">i</span></sub> using algorithm&#x00A0;<a
+href="#x1-26069r6">3.6<!--tex4ht:ref: alg:version-comparison --></a>
+ </span><a
+ id="x1-26055r50"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">for</span><a
+ id="x1-26056r51"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">Asn &#x003E; Bsn</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26057r52"></a>
+ <br /><span class="ALCitem">8:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">As</span><sub><span
+class="cmmi-7">Bsn</span></sub> is of type <span
+class="ectt-1000">_p</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26058r53"></a>
+ <br /><span class="ALCitem">9:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003E; B</span>
+ </span><a
+ id="x1-26059r54"></a>
+<br /><span class="ALCitem">10:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span><span class="else-body">
+<a
+ id="x1-26060r55"></a>
+<br /><span class="ALCitem">11:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003C; B</span>
+ </span><a
+ id="x1-26061r56"></a>
+<br /><span class="ALCitem">12:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-26062r57"></a>
+<br /><span class="ALCitem">13:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">Asn &#x003C; Bsn</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26063r58"></a>
+<br /><span class="ALCitem">14:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">Bs</span><sub><span
+class="cmmi-7">Asn</span></sub> is of type <span
+class="ectt-1000">_p</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26064r59"></a>
+<br /><span class="ALCitem">15:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003C; B</span>
+ </span><a
+ id="x1-26065r60"></a>
+<br /><span class="ALCitem">16:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span><span class="else-body">
+<a
+ id="x1-26066r61"></a>
+<br /><span class="ALCitem">17:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003E; B</span>
+ </span><a
+ id="x1-26067r62"></a>
+<br /><span class="ALCitem">18:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-26068r63"></a>
+<br /><span class="ALCitem">19:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+</div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="algorithm">
+
+
+<!--l. 179--><p class="noindent" ><a
+ id="x1-26069r6"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Algorithm 3.6: </span><span
+class="content">Version comparison logic for each suffix</span></div><!--tex4ht:label?: x1-26069r6 -->
+<div class="algorithmic">
+<a
+ id="x1-26070r64"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">As</span><sub><span
+class="cmmi-7">i</span></sub> and <span
+class="cmmi-10">Bs</span><sub><span
+class="cmmi-7">i</span></sub> are of the same type (<span
+class="ectt-1000">_alpha </span>vs <span
+class="ectt-1000">_beta </span>etc)&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26071r65"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let <span
+class="cmmi-10">As</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub> be the integer part of <span
+class="cmmi-10">As</span><sub><span
+class="cmmi-7">i</span></sub> if any, otherwise <span
+class="ectt-1000">0</span> <a
+ id="x1-26072r66"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let <span
+class="cmmi-10">Bs</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub> be the integer part of <span
+class="cmmi-10">Bs</span><sub><span
+class="cmmi-7">i</span></sub> if any, otherwise <span
+class="ectt-1000">0</span> <a
+ id="x1-26073r67"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">As</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub> <span
+class="cmmi-10">&#x003E; Bs</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub>, using integer comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26074r68"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003E; B</span>
+ </span><a
+ id="x1-26075r69"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">As</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub> <span
+class="cmmi-10">&#x003C; Bs</span><span
+class="cmsy-10">&#x2032;</span><sub><span
+class="cmmi-7">i</span></sub>, using integer comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26076r70"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003C; B</span>
+ </span><a
+ id="x1-26077r71"></a>
+ <br /><span class="ALCitem">8:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-26078r72"></a>
+ <br /><span class="ALCitem">9:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;the type of <span
+class="cmmi-10">As</span><sub><span
+class="cmmi-7">i</span></sub> is greater than the type of <span
+class="cmmi-10">Bs</span><sub><span
+class="cmmi-7">i</span></sub> using the ordering
+ <span
+class="ectt-1000">_alpha</span> <span
+class="cmmi-10">&#x003C;</span> <span
+class="ectt-1000">_beta</span> <span
+class="cmmi-10">&#x003C;</span> <span
+class="ectt-1000">_pre</span> <span
+class="cmmi-10">&#x003C;</span> <span
+class="ectt-1000">_rc</span> <span
+class="cmmi-10">&#x003C;</span> <span
+class="ectt-1000">_p</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26079r73"></a>
+<br /><span class="ALCitem">10:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003E; B</span>
+ </span><a
+ id="x1-26080r74"></a>
+<br /><span class="ALCitem">11:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span><span class="else-body">
+<a
+ id="x1-26081r75"></a>
+<br /><span class="ALCitem">12:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003C; B</span>
+ </span><a
+ id="x1-26082r76"></a>
+<br /><span class="ALCitem">13:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+</div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="algorithm">
+
+
+<!--l. 199--><p class="noindent" ><a
+ id="x1-26083r7"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Algorithm 3.7: </span><span
+class="content">Version comparison logic for revision components</span></div><!--tex4ht:label?: x1-26083r7 -->
+<div class="algorithmic">
+<a
+ id="x1-26084r77"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let <span
+class="cmmi-10">Ar </span>be the integer part of the revision component of <span
+class="cmmi-10">A </span>if any, otherwise <span
+class="ectt-1000">0</span> <a
+ id="x1-26085r78"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let <span
+class="cmmi-10">Br </span>be the integer part of the revision component of <span
+class="cmmi-10">B </span>if any, otherwise <span
+class="ectt-1000">0</span> <a
+ id="x1-26086r79"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">Ar &#x003E; Br </span>using integer comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26087r80"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003E; B</span>
+ </span><a
+ id="x1-26088r81"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">Ar &#x003C; Br </span>using integer comparison&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-26089r82"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;<span
+class="cmmi-10">A &#x003C; B</span>
+ </span><a
+ id="x1-26090r83"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+</div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h3 class="sectionHead"><span class="titlemark">3.4 </span> <a
+ id="x1-270003.4"></a>Uniqueness of Versions</h3>
+<!--l. 214--><p class="noindent" >No two packages in a given repository may have the same qualified package name and equal
+versions. For example, a repository may not contain more than one of <span
+class="ectt-1000">foo-bar/baz-1.0.2</span>,
+<span
+class="ectt-1000">foo-bar/baz-1.0.2-r0 </span>and <span
+class="ectt-1000">foo-bar/baz-1.000.2</span>.
+
+
+
+
+
+
+</p>
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;4</span><br /><a
+ id="x1-280004"></a>Tree Layout</h2>
+<!--l. 3--><p class="noindent" >This chapter defines the layout on-disk of an ebuild repository. In all cases below where a file or
+directory is specified, a symlink to a file or directory is also valid. In this case, the package manager
+must follow the operating system&#8217;s semantics for symbolic links and must not behave differently
+from normal.
+</p>
+<h3 class="sectionHead"><span class="titlemark">4.1 </span> <a
+ id="x1-290004.1"></a>Top Level</h3>
+<!--l. 10--><p class="noindent" >An ebuild repository shall occupy one directory on disk, with the following subdirectories:
+ </p><ul>
+ <li class="compactitem">One directory per category, whose name shall be the name of the category. The layout
+ of these directories shall be as described in section&#x00A0;<a
+href="#x1-300004.2">4.2<!--tex4ht:ref: sec:category-dirs --></a>.
+ </li>
+ <li class="compactitem">A <span
+class="ectt-1000">profiles </span>directory, described in section&#x00A0;<a
+href="#x1-320004.4">4.4<!--tex4ht:ref: sec:profiles-dir --></a>.
+ </li>
+ <li class="compactitem">A <span
+class="ectt-1000">licenses </span>directory (optional), described in section&#x00A0;<a
+href="#x1-370004.5">4.5<!--tex4ht:ref: sec:licenses-dir --></a>.
+ </li>
+ <li class="compactitem">An <span
+class="ectt-1000">eclass </span>directory (optional), described in section&#x00A0;<a
+href="#x1-380004.6">4.6<!--tex4ht:ref: sec:eclass-dir --></a>.
+ </li>
+ <li class="compactitem">A <span
+class="ectt-1000">metadata </span>directory (optional), described in section&#x00A0;<a
+href="#x1-390004.7">4.7<!--tex4ht:ref: sec:metadata-dir --></a>.
+ </li>
+ <li class="compactitem">Other optional support files and directories (skeleton ebuilds or ChangeLogs, for
+ example) may exist but are not covered by this specification. The package manager
+ must ignore any of these files or directories that it does not recognise.
+ </li></ul>
+<!--l. 24--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">4.2 </span> <a
+ id="x1-300004.2"></a>Category Directories</h3>
+<!--l. 27--><p class="noindent" >Each category provided by the repository (see also: the <span
+class="ectt-1000">profiles/categories </span>file, section&#x00A0;<a
+href="#x1-320004.4">4.4<!--tex4ht:ref: profiles-categories --></a>)
+shall be contained in one directory, whose name shall be that of the category. Each category
+directory shall contain:
+ </p><ul>
+ <li class="compactitem">A <span
+class="ectt-1000">metadata.xml </span>file, as described in appendix&#x00A0;<a
+href="#x1-156000A">A<!--tex4ht:ref: sec:metadata-xml --></a>. Optional.
+ </li>
+ <li class="compactitem">Zero or more package directories, one for each package in the category, as described
+ in section&#x00A0;<a
+href="#x1-310004.3">4.3<!--tex4ht:ref: sec:package-dirs --></a>. The name of the package directory shall be the corresponding package
+ name.</li></ul>
+<!--l. 38--><p class="noindent" >Category directories may contain additional files, whose purpose is not covered by this
+specification. Additional directories that are not for a package may <span
+class="ecti-1000">not </span>be present, to avoid
+conflicts with package name directories; an exception is made for filesystem components whose
+name starts with a dot, which the package manager must ignore, and for any directory named
+<span
+class="ectt-1000">CVS</span>.
+</p><!--l. 43--><p class="noindent" >It is not required that a directory exists for each category provided by the repository. A category
+directory that does not exist shall be considered equivalent to an empty category (and by
+extension, a package manager may treat an empty category as a category that does not
+exist).
+
+
+</p><!--l. 47--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">4.3 </span> <a
+ id="x1-310004.3"></a>Package Directories</h3>
+<!--l. 50--><p class="noindent" >A package directory contains the following:
+ </p><ul>
+ <li class="compactitem">Zero or more ebuilds. These are as described in section&#x00A0;<a
+href="#x1-580006">6<!--tex4ht:ref: sec:ebuild-format --></a> and others.
+ </li>
+ <li class="compactitem">A <span
+class="ectt-1000">metadata.xml </span>file, as described in appendix&#x00A0;<a
+href="#x1-156000A">A<!--tex4ht:ref: sec:metadata-xml --></a>. Optional only for legacy support.
+ </li>
+ <li class="compactitem">A <span
+class="ectt-1000">ChangeLog</span>, in a format determined by the provider of the repository. Optional.
+ </li>
+ <li class="compactitem">A <span
+class="ectt-1000">Manifest </span>file, whose format is described in&#x00A0;<span class="cite">[<a
+href="#XGlep44">3</a>]</span>. Can be omitted if the file would be
+ empty.
+ </li>
+ <li class="compactitem">A <span
+class="ectt-1000">files </span>directory, containing any support files needed by the ebuilds. Optional.</li></ul>
+<!--l. 61--><p class="noindent" >Any ebuild in a package directory must be named <span
+class="ectt-1000">name-ver.ebuild</span>, where <span
+class="ectt-1000">name </span>is the
+(unqualified) package name, and <span
+class="ectt-1000">ver </span>is the package&#8217;s version. Package managers must ignore any
+ebuild file that does not match these rules.
+</p><!--l. 65--><p class="noindent" >A package directory that contains no correctly named ebuilds shall be considered a package with
+no versions. A package with no versions shall be considered equivalent to a package that does not
+exist (and by extension, a package manager may treat a package that does not exist as a package
+with no versions).
+</p><!--l. 70--><p class="noindent" >A package directory may contain other files or directories, whose purpose is not covered by this
+specification.
+</p><!--l. 73--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">4.4 </span> <a
+ id="x1-320004.4"></a>The Profiles Directory</h3>
+<!--l. 76--><p class="noindent" >The profiles directory shall contain zero or more profile directories as described in section&#x00A0;<a
+href="#x1-410005">5<!--tex4ht:ref: sec:profiles --></a>, as
+well as the following files and directories. In any line-based file, lines beginning with a # character
+are treated as comments, whilst blank lines are ignored. All contents of this directory, with the
+exception of <span
+class="ectt-1000">repo_name</span>, are optional.
+</p><!--l. 83--><p class="noindent" >The profiles directory may contain an <span
+class="ectt-1000">eapi </span>file. This file, if it exists, must contain a single line
+with the name of an EAPI. This specifies the EAPI to use when handling the profiles
+directory; a package manager must not attempt to use any repository whose profiles
+directory requires an EAPI it does not support. If no <span
+class="ectt-1000">eapi </span>file is present, EAPI 0 shall be
+used.
+</p><!--l. 88--><p class="noindent" >If the repository is not intended to be stand-alone, the contents of these files are to be taken from
+or merged with the master repository as necessary.
+</p><!--l. 91--><p class="noindent" >Other files not described by this specification may exist, but may not be relied upon. The package
+manager must ignore any files in this directory that it does not recognise.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">arch.list</span> </dt><dd
+class="description"> Contains a list, one entry per line, of permissible values for the <span
+class="ectt-1000">ARCH </span>variable,
+ and hence permissible keywords for packages in this repository.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">categories</span> </dt><dd
+class="description"> Contains a list, one entry per line, of categories provided by this repository.
+
+
+ </dd><dt class="description">
+<span
+class="ecbx-1000">eapi</span> </dt><dd
+class="description">See above.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">info_pkgs</span> </dt><dd
+class="description">Contains a list, one entry per line, of qualified package names. Any package
+ matching one of these is to be listed when a package manager displays a &#8216;system
+ information&#8217; listing.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">info_vars</span> </dt><dd
+class="description">Contains a list, one entry per line, of profile, configuration, and environment
+ variables which are considered to be of interest. The value of each of these variables
+ may be shown when the package manager displays a &#8216;system information&#8217; listing.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">package.mask</span> </dt><dd
+class="description"> Contains a list, one entry per line, of package dependency specifications
+ (using the directory&#8217;s EAPI). Any package version matching one of these is considered
+ to be masked, and will not be installed regardless of profile unless it is unmasked by
+ the user configuration.
+ <!--l. 111--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">package-mask-dir</span></span></span> For EAPIs listed in table&#x00A0;<a
+href="#x1-32001r1">4.1<!--tex4ht:ref: tab:package-mask-dir --></a> as supporting it, <span
+class="ectt-1000">package.mask </span>can
+ be a directory instead of a regular file. Files contained in that directory, unless their
+ name begins with a dot, will be concatenated in order of their filename in the POSIX
+ locale and the result will be processed as if it were a single file. Any subdirectories will
+ be ignored.
+ </p></dd><dt class="description">
+<span
+class="ecbx-1000">profiles.desc</span> </dt><dd
+class="description">Described below in section&#x00A0;<a
+href="#x1-330004.4.1">4.4.1<!--tex4ht:ref: sec:profiles.desc --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">repo_name</span> </dt><dd
+class="description">Contains, on a single line, the name of this repository. The repository name
+ must conform to section&#x00A0;<a
+href="#x1-210003.1.5">3.1.5<!--tex4ht:ref: sec:repository-names --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">thirdpartymirrors</span> </dt><dd
+class="description">Described below in section&#x00A0;<a
+href="#x1-340004.4.2">4.4.2<!--tex4ht:ref: sec:thirdpartymirrors --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">use.desc</span> </dt><dd
+class="description">Contains descriptions of valid global USE flags for this repository. The format is
+ described in section&#x00A0;<a
+href="#x1-350004.4.3">4.4.3<!--tex4ht:ref: sec:use.desc --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">use.local.desc</span> </dt><dd
+class="description">Contains descriptions of valid local USE flags for this repository, along with
+ the packages to which they apply. The format is as described in section&#x00A0;<a
+href="#x1-350004.4.3">4.4.3<!--tex4ht:ref: sec:use.desc --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">desc/</span> </dt><dd
+class="description">This directory contains files analogous to <span
+class="ectt-1000">use.desc </span>for the various <span
+class="ectt-1000">USE_EXPAND</span>
+ variables. Each file in it is named <span
+class="ectt-1000">&#x003C;varname&#x003E;.desc</span>, where <span
+class="ectt-1000">&#x003C;varname&#x003E; </span>is the variable
+ name, in lowercase, whose possible values the file describes. The format of each file is
+ as for <span
+class="ectt-1000">use.desc</span>, described in section&#x00A0;<a
+href="#x1-350004.4.3">4.4.3<!--tex4ht:ref: sec:use.desc --></a>. The <span
+class="ectt-1000">USE_EXPAND </span>name is <span
+class="ecti-1000">not </span>included as
+ a prefix here.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">updates/</span> </dt><dd
+class="description">This directory is described in section&#x00A0;<a
+href="#x1-360004.4.4">4.4.4<!--tex4ht:ref: sec:updates-dir --></a>.</dd></dl>
+<div class="table">
+
+
+<!--l. 133--><p class="noindent" ><a
+ id="x1-32001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;4.1: </span><span
+class="content">EAPIs supporting a directory for <span
+class="ectt-1000">package.mask</span></span></div><!--tex4ht:label?: x1-32001r1 -->
+<div class="tabular">
+ <table id="TBL-2" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-2-1g"><col
+id="TBL-2-1" /><col
+id="TBL-2-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-2-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-2-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-2-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">package.mask </span><span
+class="ecbx-1000">can be a directory?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-2-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-2-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-3-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-2-3-2"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-2-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-2-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">4.4.1 </span> <a
+ id="x1-330004.4.1"></a>The profiles.desc file</h4>
+<!--l. 148--><p class="noindent" ><span
+class="ectt-1000">profiles.desc </span>is a line-based file, with the standard commenting rules from section&#x00A0;<a
+href="#x1-320004.4">4.4<!--tex4ht:ref: sec:profiles-dir --></a>,
+containing a list of profiles that are valid for use, along with their associated architecture and
+status. Each line has the format:
+
+
+</p>
+<div class="verbatim" id="verbatim-1">
+&#x003C;keyword&#x003E;&#x00A0;&#x003C;profile&#x00A0;path&#x003E;&#x00A0;&#x003C;stability&#x003E;</div>
+<!--l. 155--><p class="nopar" >
+</p><!--l. 157--><p class="noindent" >Where:
+</p><!--l. 160--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem"><span
+class="ectt-1000">&#x003C;keyword&#x003E; </span>is the default keyword for the profile and the <span
+class="ectt-1000">ARCH </span>for which the profile is
+ valid.
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">&#x003C;profile path&#x003E; </span>is the (relative) path from the <span
+class="ectt-1000">profiles </span>directory to the profile in
+ question.
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">&#x003C;stability&#x003E; </span>indicates the stability of the profile. This may be useful for QA tools,
+ which may wish to display warnings with a reduced severity for some profiles. The
+ values <span
+class="ectt-1000">stable </span>and <span
+class="ectt-1000">dev </span>are widely used, but repositories may use other values.</li></ul>
+<!--l. 169--><p class="noindent" >Fields are whitespace-delimited.
+</p><!--l. 171--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">4.4.2 </span> <a
+ id="x1-340004.4.2"></a>The thirdpartymirrors file</h4>
+<!--l. 173--><p class="noindent" ><span
+class="ectt-1000">thirdpartymirrors </span>is another simple line-based file, describing the valid mirrors for use with
+<span
+class="ectt-1000">mirror:// </span>URIs in this repository, and the associated download locations. The format of each line
+is:
+
+
+</p>
+<div class="verbatim" id="verbatim-2">
+&#x003C;mirror&#x00A0;name&#x003E;&#x00A0;&#x003C;mirror&#x00A0;1&#x003E;&#x00A0;&#x003C;mirror&#x00A0;2&#x003E;&#x00A0;...&#x00A0;&#x003C;mirror&#x00A0;n&#x003E;</div>
+<!--l. 178--><p class="nopar" >Fields are whitespace-delimited. When parsing a URI of the form <span
+class="ectt-1000">mirror://name/path/filename</span>,
+where the <span
+class="ectt-1000">path/ </span>part is optional, the <span
+class="ectt-1000">thirdpartymirrors </span>file is searched for a line whose first field
+is <span
+class="ectt-1000">name</span>. Then the download URIs in the subsequent fields have <span
+class="ectt-1000">path/filename </span>appended to them
+to generate the URIs from which a download is attempted.
+</p><!--l. 185--><p class="noindent" >Each mirror name may appear at most once in a file. Behaviour when a mirror name appears
+multiple times is undefined. Behaviour when a mirror is defined in terms of another mirror is
+undefined. A package manager may choose to fetch from all of or a subset of the listed mirrors, and
+may use an order other than the one described.
+</p><!--l. 190--><p class="noindent" >The mirror with the name equal to the repository&#8217;s name (and if the repository has a master, the
+master&#8217;s name) may be consulted for all downloads.
+</p><!--l. 193--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">4.4.3 </span> <a
+ id="x1-350004.4.3"></a>use.desc and related files</h4>
+<!--l. 195--><p class="noindent" ><span
+class="ectt-1000">use.desc </span>contains descriptions of every valid global USE flag for this repository. It is a
+line-based file with the standard rules for comments and blank lines. The format of each line
+is:
+
+
+</p>
+<div class="verbatim" id="verbatim-3">
+&#x003C;flagname&#x003E;&#x00A0;-&#x00A0;&#x003C;description&#x003E;</div>
+<!--l. 199--><p class="nopar" >
+</p><!--l. 201--><p class="noindent" ><span
+class="ectt-1000">use.local.desc </span>contains descriptions of every valid local USE flag&#8212;those that apply only to a
+small number of packages, or that have different meanings for different packages. Its format
+is:
+
+
+</p>
+<div class="verbatim" id="verbatim-4">
+&#x003C;category/package&#x003E;:&#x003C;flagname&#x003E;&#x00A0;-&#x00A0;&#x003C;description&#x003E;</div>
+<!--l. 205--><p class="nopar" >Flags must be listed once for each package to which they apply, or if a flag is listed in both
+<span
+class="ectt-1000">use.desc </span>and <span
+class="ectt-1000">use.local.desc</span>, it must be listed once for each package for which its meaning
+differs from that described in <span
+class="ectt-1000">use.desc</span>.
+</p><!--l. 210--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">4.4.4 </span> <a
+ id="x1-360004.4.4"></a>The updates directory</h4>
+<!--l. 212--><p class="noindent" >The <span
+class="ectt-1000">updates </span>directory is used to inform the package manager that a package has moved
+categories, names, or that a version has changed SLOT. It contains one file per quarter year,
+named <span
+class="ectt-1000">[1-4]Q-[YYYY] </span>for the first to fourth quarter of a given year, for example <span
+class="ectt-1000">1Q-2004 </span>or
+<span
+class="ectt-1000">3Q-2006</span>. The format of each file is again line-based, with each line having one of the following
+formats:
+
+
+</p>
+<div class="verbatim" id="verbatim-5">
+move&#x00A0;&#x003C;qpn1&#x003E;&#x00A0;&#x003C;qpn2&#x003E;
+&#x00A0;<br />slotmove&#x00A0;&#x003C;spec&#x003E;&#x00A0;&#x003C;slot1&#x003E;&#x00A0;&#x003C;slot2&#x003E;</div>
+<!--l. 220--><p class="nopar" >The first form, where <span
+class="ectt-1000">qpn1 </span>and <span
+class="ectt-1000">qpn2 </span>are <span
+class="ecti-1000">qualified package names</span>, instructs the package
+manager that the package <span
+class="ectt-1000">qpn1 </span>has changed name, category, or both, and is now called
+<span
+class="ectt-1000">qpn2</span>.
+</p><!--l. 224--><p class="noindent" >The second form instructs the package manager that any currently installed package version
+matching package dependency specification <span
+class="ectt-1000">spec </span>whose <span
+class="ectt-1000">SLOT </span>is set to <span
+class="ectt-1000">slot1 </span>should have it
+updated to <span
+class="ectt-1000">slot2</span>.
+</p><!--l. 228--><p class="noindent" >Any name that has appeared as the origin of a move must not be reused in the future. Any slot
+that has appeared as the origin of a slot move may not be used by packages matching the spec of
+that slot move in the future.
+</p><!--l. 232--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">4.5 </span> <a
+ id="x1-370004.5"></a>The Licenses Directory</h3>
+<!--l. 235--><p class="noindent" >The <span
+class="ectt-1000">licenses </span>directory shall contain copies of the licenses used by packages in the repository.
+Each file will be named according to the name used in the <span
+class="ectt-1000">LICENSE </span>variable as described in
+section&#x00A0;<a
+href="#x1-620007.3">7.3<!--tex4ht:ref: ebuild-var-LICENSE --></a>, and will contain the complete text of the license in human-readable form. Plain text
+format is strongly preferred but not required.
+</p><!--l. 240--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">4.6 </span> <a
+ id="x1-380004.6"></a>The Eclass Directory</h3>
+<!--l. 243--><p class="noindent" >The <span
+class="ectt-1000">eclass </span>directory shall contain copies of the eclasses provided by this repository. The format of
+these files is described in section&#x00A0;<a
+href="#x1-10400010">10<!--tex4ht:ref: sec:eclasses --></a>. It may also contain, in their own directory, support files
+needed by these eclasses.
+</p><!--l. 247--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">4.7 </span> <a
+ id="x1-390004.7"></a>The Metadata Directory</h3>
+<!--l. 250--><p class="noindent" >The <span
+class="ectt-1000">metadata </span>directory contains various repository-level metadata that is not contained in
+<span
+class="ectt-1000">profiles/</span>. All contents are optional. In this standard only the <span
+class="ectt-1000">cache </span>subdirectory is described;
+other contents are optional but may include security advisories, DTD files for the various XML
+files used in the repository, and repository timestamps.
+
+
+</p><!--l. 255--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">4.7.1 </span> <a
+ id="x1-400004.7.1"></a>The metadata cache</h4>
+<!--l. 257--><p class="noindent" >The <span
+class="ectt-1000">metadata/cache </span>directory may contain a cached form of all important ebuild metadata
+variables. The contents of this directory are described in chapter&#x00A0;<a
+href="#x1-15100014">14<!--tex4ht:ref: sec:metadata-cache --></a>.
+
+
+
+
+
+
+</p>
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;5</span><br /><a
+ id="x1-410005"></a>Profiles</h2>
+<h3 class="sectionHead"><span class="titlemark">5.1 </span> <a
+ id="x1-420005.1"></a>General Principles</h3>
+<!--l. 5--><p class="noindent" >Generally, a profile defines information specific to a certain &#8216;type&#8217; of system&#8212;it lies somewhere
+between repository-level defaults and user configuration in that the information it contains is not
+necessarily applicable to all machines, but is sufficiently general that it should not be left to the
+user to configure it. Some parts of the profile can be overridden by user configuration, some only by
+another profile.
+</p><!--l. 11--><p class="noindent" >The format of a profile is relatively simple. Each profile is a directory containing any number of the
+files described in this chapter, and possibly inheriting another profile. The files themselves
+follow a few basic conventions as regards inheritance and format; these are described in
+the next section. It may also contain any number of subdirectories containing other
+profiles.
+</p><!--l. 16--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">5.2 </span> <a
+ id="x1-430005.2"></a>Files That Make up a Profile</h3>
+<!--l. 18--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">5.2.1 </span> <a
+ id="x1-440005.2.1"></a>The parent file</h4>
+<!--l. 19--><p class="noindent" >A profile may contain a <span
+class="ectt-1000">parent </span>file. Each line must contain a relative path to another profile which
+will be considered as one of this profile&#8217;s parents. Any settings from the parent are inherited by
+this profile, and can be overridden by it. Precise rules for how settings are combined with the
+parent profile vary between files, and are described below. Parents are handled depth
+first, left to right, with duplicate parent paths being sourced for every time they are
+encountered.
+</p><!--l. 25--><p class="noindent" >It is illegal for a profile&#8217;s parent tree to contain cycles. Package manager behaviour upon
+encountering a cycle is undefined.
+</p><!--l. 28--><p class="noindent" >This file must not contain comments, blank lines or make use of line continuations.
+</p><!--l. 30--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">5.2.2 </span> <a
+ id="x1-450005.2.2"></a>The eapi file</h4>
+<!--l. 32--><p class="noindent" >A profile directory may contain an <span
+class="ectt-1000">eapi </span>file. This file, if it exists, must contain a single line with
+the name of an EAPI. This specifies the EAPI to use when handling the directory in question; a
+package manager must not attempt to use any profile using a directory which requires an EAPI it
+does not support. If no <span
+class="ectt-1000">eapi </span>file is present, EAPI 0 shall be used. The EAPI is neither inherited
+via the <span
+class="ectt-1000">parent </span>file nor in subdirectories.
+
+
+</p><!--l. 38--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">5.2.3 </span> <a
+ id="x1-460005.2.3"></a>deprecated</h4>
+<!--l. 39--><p class="noindent" >If a profile contains a file named <span
+class="ectt-1000">deprecated</span>, it is treated as such. The first line of this file
+should contain the path from the <span
+class="ectt-1000">profiles </span>directory of the repository to a valid profile
+that is the recommended upgrade path from this profile. The remainder of the file can
+contain any text, which may be displayed to users using this profile by the package
+manager. This file is not inherited&#8212;profiles which inherit from a deprecated profile are <span
+class="ecti-1000">not</span>
+deprecated.
+</p><!--l. 45--><p class="noindent" >This file must not contain comments or make use of line continuations.
+</p><!--l. 47--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">5.2.4 </span> <a
+ id="x1-470005.2.4"></a>make.defaults</h4>
+<!--l. 48--><p class="noindent" ><span
+class="ectt-1000">make.defaults </span>is used to define defaults for various environment and configuration variables. This
+file is unusual in that it is not combined at a file level with the parent&#8212;instead, each variable is
+combined or overridden individually as described in section&#x00A0;<a
+href="#x1-550005.3">5.3<!--tex4ht:ref: sec:profile-variables --></a>.
+</p><!--l. 52--><p class="noindent" >The file itself is a line-based key-value format. Each line contains a single <span class="obeylines-h"><span class="verb"><span
+class="ectt-1000">VAR="value"</span></span></span> entry,
+where the value must be double quoted. A variable name must start with one of <span
+class="ectt-1000">a-zA-Z </span>and may
+contain <span
+class="ectt-1000">a-zA-Z0-9_ </span>only. Additional syntax, which is a small subset of bash syntax, is allowed as
+follows:
+</p><!--l. 58--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">Variables to the right of the equals sign in the form <span
+class="ectt-1000">${foo} </span>or <span
+class="ectt-1000">$foo </span>are recognised and
+ expanded from variables previously set in this or earlier <span
+class="ectt-1000">make.defaults </span>files.
+ </li>
+ <li class="compactitem">One logical line may be continued over multiple physical lines by escaping the newline
+ with a backslash. A quoted string may be continued over multiple physical lines by
+ either a simple newline or a backslash-escaped newline.
+ </li>
+ <li class="compactitem">Backslashes, except for line continuations, are not allowed.</li></ul>
+<!--l. 66--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">5.2.5 </span> <a
+ id="x1-480005.2.5"></a>Simple line-based files</h4>
+<!--l. 68--><p class="noindent" >These files are a simple one-item-per-line list, which is inherited in the following manner: the
+parent profile&#8217;s list is taken, and the current profile&#8217;s list appended. If any line begins with a
+hyphen, then any lines previous to it whose contents are equal to the remainder of that line
+are removed from the list. Once again, blank lines and those beginning with a # are
+discarded.
+</p><!--l. 73--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">profile-file-dirs</span></span></span> In EAPIs listed in table&#x00A0;<a
+href="#x1-48001r1">5.1<!--tex4ht:ref: tab:profile-file-dirs --></a> as supporting directories for profile files, any of the
+files <span
+class="ectt-1000">package.mask</span>, <span
+class="ectt-1000">package.use</span>, <span
+class="ectt-1000">use.* </span>and <span
+class="ectt-1000">package.use.* </span>mentioned below can be a
+directory instead of a regular file. Files contained in that directory, unless their name
+begins with a dot, will be concatenated in order of their filename in the POSIX locale
+and the result will be processed as if it were a single file. Any subdirectories will be
+ignored.
+</p>
+
+
+<div class="table">
+
+
+<!--l. 81--><p class="noindent" ><a
+ id="x1-48001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;5.1: </span><span
+class="content">EAPIs supporting directories for profile files</span></div><!--tex4ht:label?: x1-48001r1 -->
+<div class="tabular">
+ <table id="TBL-3" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-3-1g"><col
+id="TBL-3-1" /><col
+id="TBL-3-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-3-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-3-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-3-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports directories for profile files?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-3-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-3-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-3-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-3-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-3-3-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-3-3-2"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-3-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-3-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">5.2.6 </span> <a
+ id="x1-490005.2.6"></a>packages</h4>
+<!--l. 95--><p class="noindent" >The <span
+class="ectt-1000">packages </span>file is used to define the &#8216;system set&#8217; for this profile. After the above rules for
+inheritance and comments are applied, its lines must take one of two forms: a package dependency
+specification prefixed by <span
+class="ectt-1000">* </span>denotes that it forms part of the system set. A package dependency
+specification on its own may also appear for legacy reasons, but should be ignored when calculating
+the system set.
+</p><!--l. 101--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">5.2.7 </span> <a
+ id="x1-500005.2.7"></a>packages.build</h4>
+<!--l. 102--><p class="noindent" >The <span
+class="ectt-1000">packages.build </span>file is used by Gentoo&#8217;s Catalyst tool to generate stage1 tarballs, and has no
+relevance to the operation of a package manager. It is thus outside the scope of this document, but
+is mentioned here for completeness.
+</p><!--l. 106--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">5.2.8 </span> <a
+ id="x1-510005.2.8"></a>package.mask</h4>
+<!--l. 107--><p class="noindent" ><span
+class="ectt-1000">package.mask </span>is used to prevent packages from being installed on a given profile. Each line
+contains one package dependency specification; anything matching this specification will not be
+installed unless unmasked by the user&#8217;s configuration. In some EAPIs, <span
+class="ectt-1000">package.mask </span>can be a
+directory instead of a regular file as per section&#x00A0;<a
+href="#x1-480005.2.5">5.2.5<!--tex4ht:ref: sec:line-stacking --></a>.
+</p><!--l. 112--><p class="noindent" >Note that the <span
+class="ectt-1000">-spec </span>syntax can be used to remove a mask in a parent profile, but not necessarily a
+global mask (from <span
+class="ectt-1000">profiles/package.mask</span>, section&#x00A0;<a
+href="#x1-320004.4">4.4<!--tex4ht:ref: profiles-package.mask --></a>).
+</p><!--l. 116--><p class="noindent" >
+</p><dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>Portage currently treats <span
+class="ectt-1000">profiles/package.mask </span>as being on the leftmost branch of
+the inherit tree when it comes to <span
+class="ectt-1000">-lines</span>. This behaviour may not be relied upon.</dd></dl>
+<!--l. 118--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">5.2.9 </span> <a
+ id="x1-520005.2.9"></a>package.provided</h4>
+<!--l. 119--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">package-provided</span></span></span> <span
+class="ectt-1000">package.provided </span>is used to tell the package manager that a certain package
+version should be considered to be provided by the system regardless of whether it is actually
+installed. Because it has severe adverse effects on USE-based and slot-based dependencies, its use is
+strongly deprecated and package manager support must be regarded as purely optional. Supported
+in EAPIs as per table&#x00A0;<a
+href="#x1-52001r2">5.2<!--tex4ht:ref: tab:package-provided --></a>.
+</p>
+<div class="table">
+
+
+<!--l. 126--><p class="noindent" ><a
+ id="x1-52001r2"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;5.2: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">package.provided </span>in profiles</span></div><!--tex4ht:label?: x1-52001r2 -->
+<div class="tabular">
+ <table id="TBL-4" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-4-1g"><col
+id="TBL-4-1" /><col
+id="TBL-4-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-4-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-4-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-4-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">package.provided</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-4-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-4-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-4-2-2"
+class="td11"> Optionally </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-4-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-4-3-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-4-3-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-4-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-4-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">5.2.10 </span> <a
+ id="x1-530005.2.10"></a>package.use</h4>
+<!--l. 140--><p class="noindent" >The <span
+class="ectt-1000">package.use </span>file may be used by the package manager to override the default USE flags
+specified by <span
+class="ectt-1000">make.defaults </span>on a per package basis. The format is to have a package
+dependency specification, and then a space delimited list of USE flags to enable. A USE flag
+in the form of <span
+class="ectt-1000">-flag </span>indicates that the package should have the USE flag disabled.
+The package dependency specification is limited to the forms defined by the directory&#8217;s
+EAPI. In some EAPIs, <span
+class="ectt-1000">package.use </span>can be a directory instead of a regular file as per
+section&#x00A0;<a
+href="#x1-480005.2.5">5.2.5<!--tex4ht:ref: sec:line-stacking --></a>.
+</p><!--l. 147--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">5.2.11 </span> <a
+ id="x1-540005.2.11"></a>USE masking and forcing</h4>
+<!--l. 149--><p class="noindent" >This section covers the eight files <span
+class="ectt-1000">use.mask</span>, <span
+class="ectt-1000">use.force</span>, <span
+class="ectt-1000">use.stable.mask</span>, <span
+class="ectt-1000">use.stable.force</span>,
+<span
+class="ectt-1000">package.use.mask</span>, <span
+class="ectt-1000">package.use.force</span>, <span
+class="ectt-1000">package.use.stable.mask</span>, and <span
+class="ectt-1000">package.use.</span>
+<span
+class="ectt-1000">stable.force</span>. They are described together because they interact in a non-trivial manner. In some
+EAPIs, these files can be directories instead of regular files as per section&#x00A0;<a
+href="#x1-480005.2.5">5.2.5<!--tex4ht:ref: sec:line-stacking --></a>.
+</p><!--l. 155--><p class="noindent" >Simply speaking, <span
+class="ectt-1000">use.mask </span>and <span
+class="ectt-1000">use.force </span>are used to say that a given USE flag must
+never or always, respectively, be enabled when using this profile. <span
+class="ectt-1000">package.use.mask </span>and
+<span
+class="ectt-1000">package.use.force </span>do the same thing on a per-package, or per-version, basis.
+</p><!--l. 159--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">stablemask</span></span></span> In profile directories with an EAPI supporting stable masking, as listed in table&#x00A0;<a
+href="#x1-54001r3">5.3<!--tex4ht:ref: tab:profile-stablemask --></a>,
+the same is true for <span
+class="ectt-1000">use.stable.mask</span>, <span
+class="ectt-1000">use.stable.force</span>, <span
+class="ectt-1000">package.use.stable.mask </span>and
+<span
+class="ectt-1000">package.use.stable.force</span>. These files, however, only act on packages that are merged due to a
+stable keyword in the sense of subsection&#x00A0;<a
+href="#x1-640007.3.2">7.3.2<!--tex4ht:ref: sec:keywords --></a>. Thus, these files can be used to restrict the feature
+set deemed stable in a package.
+</p>
+<div class="table">
+
+
+<!--l. 168--><p class="noindent" ><a
+ id="x1-54001r3"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;5.3: </span><span
+class="content">Profile directory support for masking/forcing use flags in stable versions only</span></div><!--tex4ht:label?: x1-54001r3 -->
+<div class="tabular">
+ <table id="TBL-5" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-5-1g"><col
+id="TBL-5-1" /><col
+id="TBL-5-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-5-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-5-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-5-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports masking/forcing use flags in stable versions?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-5-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-2-1"
+class="td11"> 0, 1, 2, 3, 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-5-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-5-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-3-1"
+class="td11"> 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-5-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-5-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-5-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<!--l. 181--><p class="noindent" >The precise manner in which the eight files interact is less simple, and is best described in terms of
+the algorithm used to determine whether a flag is masked for a given package version. This is
+described in algorithm&#x00A0;<a
+href="#x1-54002r1">5.1<!--tex4ht:ref: alg:use-masking --></a>. </p><div class="algorithm">
+
+
+<!--l. 185--><p class="noindent" ><a
+ id="x1-54002r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Algorithm 5.1: </span><span
+class="content"><span
+class="ectt-1000">USE </span>masking logic</span></div><!--tex4ht:label?: x1-54002r1 -->
+<div class="algorithmic">
+<a
+ id="x1-54003r84"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let masked = false <a
+ id="x1-54004r85"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">for</span>&#x00A0;each profile in the inheritance tree, depth first&#x00A0;<span
+class="ecbx-1000">do</span><span class="for-body">
+<a
+ id="x1-54005r86"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="ectt-1000">use.mask </span>contains <span
+class="ecti-1000">flag</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-54006r87"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> let masked = true
+ </span><a
+ id="x1-54007r88"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="ectt-1000">use.mask </span>contains <span
+class="ecti-1000">-flag</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-54008r89"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> let masked = false
+ </span><a
+ id="x1-54009r90"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-54010r91"></a>
+ <br /><span class="ALCitem">8:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;stable keyword in use&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-54011r92"></a>
+ <br /><span class="ALCitem">9:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="ectt-1000">use.stable.mask </span>contains <span
+class="ecti-1000">flag</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-54012r93"></a>
+<br /><span class="ALCitem">10:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> let masked = true
+ </span><a
+ id="x1-54013r94"></a>
+<br /><span class="ALCitem">11:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="ectt-1000">use.stable.mask </span>contains <span
+class="ecti-1000">-flag</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-54014r95"></a>
+<br /><span class="ALCitem">12:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> let masked = false
+ </span><a
+ id="x1-54015r96"></a>
+<br /><span class="ALCitem">13:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-54016r97"></a>
+<br /><span class="ALCitem">14:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-54017r98"></a>
+<br /><span class="ALCitem">15:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">for</span>&#x00A0;each <span
+class="cmmi-10">line </span>in package.use.mask, in order, for which the spec matches <span
+class="cmmi-10">package</span>&#x00A0;<span
+class="ecbx-1000">do</span><span class="for-body">
+<a
+ id="x1-54018r99"></a>
+<br /><span class="ALCitem">16:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">line </span>contains <span
+class="ecti-1000">flag</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-54019r100"></a>
+<br /><span class="ALCitem">17:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> let masked = true
+ </span><a
+ id="x1-54020r101"></a>
+<br /><span class="ALCitem">18:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">line </span>contains <span
+class="ecti-1000">-flag</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-54021r102"></a>
+<br /><span class="ALCitem">19:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> let masked = false
+ </span><a
+ id="x1-54022r103"></a>
+<br /><span class="ALCitem">20:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-54023r104"></a>
+<br /><span class="ALCitem">21:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">for</span><a
+ id="x1-54024r105"></a>
+<br /><span class="ALCitem">22:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;stable keyword in use&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-54025r106"></a>
+<br /><span class="ALCitem">23:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">for</span>&#x00A0;each <span
+class="cmmi-10">line </span>in package.use.stable.mask, in order, for which the spec matches
+ <span
+class="cmmi-10">package</span>&#x00A0;<span
+class="ecbx-1000">do</span><span class="for-body">
+<a
+ id="x1-54026r107"></a>
+<br /><span class="ALCitem">24:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">line </span>contains <span
+class="ecti-1000">flag</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-54027r108"></a>
+<br /><span class="ALCitem">25:</span><span class="ALIndent" style="width:44.98901pt;">&nbsp;</span> let masked = true
+ </span><a
+ id="x1-54028r109"></a>
+<br /><span class="ALCitem">26:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="cmmi-10">line </span>contains <span
+class="ecti-1000">-flag</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-54029r110"></a>
+<br /><span class="ALCitem">27:</span><span class="ALIndent" style="width:44.98901pt;">&nbsp;</span> let masked = false
+ </span><a
+ id="x1-54030r111"></a>
+<br /><span class="ALCitem">28:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-54031r112"></a>
+<br /><span class="ALCitem">29:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">for</span>
+
+
+ </span><a
+ id="x1-54032r113"></a>
+<br /><span class="ALCitem">30:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-54033r114"></a>
+<br /><span class="ALCitem">31:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">for</span>
+</div>
+
+
+</div><hr class="endfloat" />
+</div>
+<!--l. 221--><p class="noindent" >Stable restrictions (&#8220;stable keyword in use&#8221; in algorithm&#x00A0;<a
+href="#x1-54002r1">5.1<!--tex4ht:ref: alg:use-masking --></a>) are applied exactly if replacing in
+<span
+class="ectt-1000">KEYWORDS </span>all stable keywords by the corresponding tilde prefixed keywords (see subsection&#x00A0;<a
+href="#x1-640007.3.2">7.3.2<!--tex4ht:ref: sec:keywords --></a>)
+would result in the package installation being prevented due to the <span
+class="ectt-1000">KEYWORDS </span>setting.
+</p><!--l. 226--><p class="noindent" >The logic for <span
+class="ectt-1000">use.force</span>, <span
+class="ectt-1000">use.stable.force</span>, <span
+class="ectt-1000">package.use.force</span>, and <span
+class="ectt-1000">package.use.</span>
+<span
+class="ectt-1000">stable.force </span>is identical. If a flag is both masked and forced, the mask is considered to take
+precedence.
+</p><!--l. 230--><p class="noindent" ><span
+class="ectt-1000">USE_EXPAND </span>values may be forced or masked by using <span
+class="ectt-1000">expand_name_value</span>.
+</p><!--l. 232--><p class="noindent" >A package manager may treat <span
+class="ectt-1000">ARCH </span>values that are not the current architecture as being
+masked.
+</p>
+<h3 class="sectionHead"><span class="titlemark">5.3 </span> <a
+ id="x1-550005.3"></a>Profile Variables</h3>
+<!--l. 4--><p class="noindent" >This section documents variables that have special meaning, or special behaviour, when defined in
+a profile&#8217;s <span
+class="ectt-1000">make.defaults </span>file.
+</p><!--l. 7--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">5.3.1 </span> <a
+ id="x1-560005.3.1"></a>Incremental variables</h4>
+<!--l. 8--><p class="noindent" ><span
+class="ecti-1000">Incremental </span>variables must stack between parent and child profiles in the following manner:
+Beginning with the highest parent profile, tokenise the variable&#8217;s value based on whitespace and
+concatenate the lists. Then, for any token <span
+class="cmmi-10">T </span>beginning with a hyphen, remove it and any previous
+tokens whose value is equal to <span
+class="cmmi-10">T </span>with the hyphen removed, or, if <span
+class="cmmi-10">T </span>is equal to <span
+class="ectt-1000">-*</span>, remove all
+previous values. Note that because of this treatment, the order of tokens in the final result is
+arbitrary, not necessarily related to the order of tokens in any given profile. The following variables
+must be treated in this fashion:
+ </p><ul>
+ <li class="compactitem"><span
+class="ectt-1000">USE</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">USE_EXPAND</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">USE_EXPAND_HIDDEN</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">CONFIG_PROTECT</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">CONFIG_PROTECT_MASK</span></li></ul>
+<!--l. 23--><p class="noindent" >If the package manager supports any EAPI listed in table&#x00A0;<a
+href="#x1-56001r4">5.4<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as using profile-defined <span
+class="ectt-1000">IUSE</span>
+injection, the following variables must also be treated incrementally; otherwise, the following
+variables may or may not be treated incrementally:
+ </p><ul>
+ <li class="compactitem"><span
+class="ectt-1000">IUSE_IMPLICIT</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">USE_EXPAND_IMPLICIT</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">USE_EXPAND_UNPREFIXED</span></li></ul>
+
+
+<!--l. 32--><p class="noindent" >If the package manager supports any EAPI listed in table&#x00A0;<a
+href="#x1-56002r5">5.5<!--tex4ht:ref: tab:profile-env-unset --></a> as using <span
+class="ectt-1000">ENV_UNSET</span>, the following
+variable must also be treated incrementally; otherwise, it may or may not be treated
+incrementally:
+ </p><ul>
+ <li class="compactitem"><span
+class="ectt-1000">ENV_UNSET</span></li></ul>
+<!--l. 39--><p class="noindent" >Other variables, except where they affect only package-manager-specific functionality (such as
+Portage&#8217;s <span
+class="ectt-1000">FEATURES </span>variable), must not be treated incrementally&#8212;later definitions shall completely
+override those in parent profiles.
+</p>
+<div class="table">
+
+
+<!--l. 44--><p class="noindent" ><a
+ id="x1-56001r4"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;5.4: </span><span
+class="content">Profile-defined <span
+class="ectt-1000">IUSE </span>injection for EAPIs</span></div><!--tex4ht:label?: x1-56001r4 -->
+<div class="tabular">
+ <table id="TBL-6" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-6-1g"><col
+id="TBL-6-1" /><col
+id="TBL-6-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-6-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-6-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-6-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports profile-defined </span><span
+class="ectt-1000">IUSE </span><span
+class="ecbx-1000">injection?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-6-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-6-2-1"
+class="td11"> 0, 1, 2, 3, 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-6-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-6-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-6-3-1"
+class="td11"> 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-6-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-6-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-6-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 58--><p class="noindent" ><a
+ id="x1-56002r5"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;5.5: </span><span
+class="content">Profile-defined unsetting of variables in EAPIs</span></div><!--tex4ht:label?: x1-56002r5 -->
+<div class="tabular">
+ <table id="TBL-7" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-7-1g"><col
+id="TBL-7-1" /><col
+id="TBL-7-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-7-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-7-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-7-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">ENV_UNSET</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-7-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-7-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-7-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-7-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-7-3-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-7-3-2"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-7-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-7-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">5.3.2 </span> <a
+ id="x1-570005.3.2"></a>Specific variables and their meanings</h4>
+<!--l. 72--><p class="noindent" >The following variables have specific meanings when set in profiles.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">ARCH</span> </dt><dd
+class="description">The system&#8217;s architecture. Must be a value listed in <span
+class="ectt-1000">profiles/arch.list</span>; see
+ section&#x00A0;<a
+href="#x1-320004.4">4.4<!--tex4ht:ref: arch.list --></a> for more information. Must be equal to the primary <span
+class="ectt-1000">KEYWORD </span>for this profile.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">CONFIG_PROTECT, CONFIG_PROTECT_MASK</span> </dt><dd
+class="description">Contain
+ whitespace-delimited lists used to control the configuration file protection. Described
+ more fully in chapter&#x00A0;<a
+href="#x1-14600013.3.3">13.3.3<!--tex4ht:ref: sec:config-protect --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">USE</span> </dt><dd
+class="description">Defines the list of default USE flags for this profile. Flags may be added or removed
+ by the user&#8217;s configuration. <span
+class="ectt-1000">USE_EXPAND </span>values must not be specified in this way.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">USE_EXPAND</span> </dt><dd
+class="description">Defines a list of variables which are to be treated incrementally and
+ whose contents are to be expanded into the USE variable as passed to ebuilds. See
+ section&#x00A0;<a
+href="#x1-11000011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for details.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">USE_EXPAND_UNPREFIXED</span> </dt><dd
+class="description">Similar to <span
+class="ectt-1000">USE_EXPAND</span>, but no prefix is used. If
+ the repository contains any package using an EAPI supporting profile-defined <span
+class="ectt-1000">IUSE</span>
+ injection (see table&#x00A0;<a
+href="#x1-56001r4">5.4<!--tex4ht:ref: tab:profile-iuse-injection-table --></a>), this list must contain at least <span
+class="ectt-1000">ARCH</span>. See section&#x00A0;<a
+href="#x1-11000011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for
+ details.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">USE_EXPAND_HIDDEN</span> </dt><dd
+class="description">Contains a (possibly empty) subset of names from
+ <span
+class="ectt-1000">USE_EXPAND </span>and <span
+class="ectt-1000">USE_EXPAND_UNPREFIXED</span>. The package manager may use this set as
+ a hint to avoid displaying uninteresting or unhelpful information to an end user.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">USE_EXPAND_IMPLICIT, IUSE_IMPLICIT</span> </dt><dd
+class="description">Used to inject implicit values into
+ <span
+class="ectt-1000">IUSE</span>. See section&#x00A0;<a
+href="#x1-11000011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for details.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">ENV_UNSET</span> </dt><dd
+class="description">Contains a whitespace-delimited list of variables that the package manager
+ shall unset. See section&#x00A0;<a
+href="#x1-10900011.1">11.1<!--tex4ht:ref: sec:ebuild-env-vars --></a> for details.</dd></dl>
+<!--l. 97--><p class="noindent" >In addition, for EAPIs listed in table&#x00A0;<a
+href="#x1-56001r4">5.4<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span
+class="ectt-1000">IUSE </span>injection, the variables
+named in <span
+class="ectt-1000">USE_EXPAND </span>and <span
+class="ectt-1000">USE_EXPAND_UNPREFIXED </span>have special handling as described in
+section&#x00A0;<a
+href="#x1-11000011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a>.
+</p><!--l. 101--><p class="noindent" >Any other variables set in <span
+class="ectt-1000">make.defaults </span>must be passed on into the ebuild environment as-is,
+and are not required to be interpreted by the package manager.
+
+
+
+
+
+
+</p>
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;6</span><br /><a
+ id="x1-580006"></a>Ebuild File Format</h2>
+<!--l. 4--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">bash-version</span></span></span> The ebuild file format is in its basic form a subset of the format of a bash script.
+The interpreter is assumed to be GNU bash, version as listed in table&#x00A0;<a
+href="#x1-58001r1">6.1<!--tex4ht:ref: tab:bash-version --></a>, or any later version. If
+possible, the package manager should set the shell&#8217;s compatibility level to the exact version
+specified. It must ensure that any such compatibility settings (e. g.&#x00A0;the <span
+class="ectt-1000">BASH_COMPAT </span>variable) are
+not exported to external programs.
+</p><!--l. 10--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">failglob</span></span></span> For EAPIs listed such in table&#x00A0;<a
+href="#x1-58001r1">6.1<!--tex4ht:ref: tab:bash-version --></a>, the <span
+class="ectt-1000">failglob </span>option of bash is set in the global
+scope of ebuilds. If set, failed pattern matches during filename expansion result in an error when
+the ebuild is being sourced.
+</p><!--l. 14--><p class="noindent" >The file encoding must be UTF-8 with Unix-style newlines. When sourced, the ebuild must define
+certain variables and functions (see sections&#x00A0;<a
+href="#x1-590007">7<!--tex4ht:ref: sec:ebuild-vars --></a> and&#x00A0;<a
+href="#x1-840009">9<!--tex4ht:ref: sec:ebuild-functions --></a> for specific information), and must not call
+any external programs, write anything to standard output or standard error, or modify the state of
+the system in any way.
+</p>
+<div class="table">
+
+
+<!--l. 20--><p class="noindent" ><a
+ id="x1-58001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;6.1: </span><span
+class="content">Bash version and options</span></div><!--tex4ht:label?: x1-58001r1 -->
+<div class="tabular">
+ <table id="TBL-8" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-8-1g"><col
+id="TBL-8-1" /><col
+id="TBL-8-2" /><col
+id="TBL-8-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-8-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-8-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-8-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Bash version</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-8-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">failglob </span><span
+class="ecbx-1000">in global scope?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-8-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-8-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-8-2-2"
+class="td11"> 3.2 </td><td style="white-space:nowrap; text-align:left;" id="TBL-8-2-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-8-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-8-3-1"
+class="td11"> 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-8-3-2"
+class="td11"> 4.2 </td><td style="white-space:nowrap; text-align:left;" id="TBL-8-3-3"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-8-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-8-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+
+
+
+
+
+
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;7</span><br /><a
+ id="x1-590007"></a>Ebuild-defined Variables</h2>
+<dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>This section describes variables that may or must be defined by ebuilds. For variables
+that are passed from the package manager to the ebuild, see section&#x00A0;<a
+href="#x1-10900011.1">11.1<!--tex4ht:ref: sec:ebuild-env-vars --></a>.</dd></dl>
+<!--l. 7--><p class="noindent" >If any of these variables are set to invalid values, or if any of the mandatory variables are
+undefined, the package manager&#8217;s behaviour is undefined; ideally, an error in one ebuild should not
+prevent operations upon other ebuilds or packages.
+</p>
+<h3 class="sectionHead"><span class="titlemark">7.1 </span> <a
+ id="x1-600007.1"></a>Metadata Invariance</h3>
+<!--l. 14--><p class="noindent" >All ebuild-defined variables discussed in this chapter must be defined independently of any system,
+profile or tree dependent data, and must not vary depending upon the ebuild phase. In particular,
+ebuild metadata can and will be generated on a different system from that upon which the
+ebuild will be used, and the ebuild must generate identical metadata every time it is
+used.
+</p><!--l. 20--><p class="noindent" >Globally defined ebuild variables without a special meaning must similarly not rely upon variable
+data.
+</p><!--l. 23--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">7.2 </span> <a
+ id="x1-610007.2"></a>Mandatory Ebuild-defined Variables</h3>
+<!--l. 26--><p class="noindent" >All ebuilds must define at least the following variables:
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">DESCRIPTION</span> </dt><dd
+class="description">A short human-readable description of the package&#8217;s purpose. May be
+ defined by an eclass. Must not be empty.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">SLOT</span> </dt><dd
+class="description">The package&#8217;s slot. Must be a valid slot name, as per section&#x00A0;<a
+href="#x1-190003.1.3">3.1.3<!--tex4ht:ref: sec:slot-names --></a>. May be defined
+ by an eclass. Must not be empty.
+ <!--l. 34--><p class="noindent" >In EAPIs shown in table&#x00A0;<a
+href="#x1-75001r7">8.7<!--tex4ht:ref: tab:slot-deps-table --></a> as supporting sub-slots, the <span
+class="ectt-1000">SLOT </span>variable may contain
+ an optional sub-slot part that follows the regular slot and is delimited by a <span
+class="ectt-1000">/ </span>character.
+ The sub-slot must be a valid slot name, as per section&#x00A0;<a
+href="#x1-190003.1.3">3.1.3<!--tex4ht:ref: sec:slot-names --></a>. The sub-slot is used to
+ represent cases in which an upgrade to a new version of a package with a different
+ sub-slot may require dependent packages to be rebuilt. When the sub-slot part is
+ omitted from the <span
+class="ectt-1000">SLOT </span>definition, the package is considered to have an implicit sub-slot
+ which is equal to the regular slot.</p></dd></dl>
+<!--l. 43--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">7.3 </span> <a
+ id="x1-620007.3"></a>Optional Ebuild-defined Variables</h3>
+<!--l. 45--><p class="noindent" >Ebuilds may define any of the following variables:
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">EAPI</span> </dt><dd
+class="description">The EAPI. See below.
+
+
+ </dd><dt class="description">
+<span
+class="ecbx-1000">HOMEPAGE</span> </dt><dd
+class="description">The URI or URIs for a package&#8217;s homepage, including protocols. See
+ section&#x00A0;<a
+href="#x1-670008">8<!--tex4ht:ref: sec:dependencies --></a> for full syntax.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">SRC_URI</span> </dt><dd
+class="description">A list of source URIs for the package. Valid protocols are <span
+class="ectt-1000">http://</span>, <span
+class="ectt-1000">https://</span>,
+ <span
+class="ectt-1000">ftp:// </span>and <span
+class="ectt-1000">mirror:// </span>(see section&#x00A0;<a
+href="#x1-340004.4.2">4.4.2<!--tex4ht:ref: sec:thirdpartymirrors --></a> for mirror behaviour). Fetch restricted
+ packages may include URL parts consisting of just a filename. See section&#x00A0;<a
+href="#x1-670008">8<!--tex4ht:ref: sec:dependencies --></a> for full
+ syntax.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">LICENSE</span> </dt><dd
+class="description">The package&#8217;s license. Each text token must be a valid license name, as per
+ section&#x00A0;<a
+href="#x1-220003.1.6">3.1.6<!--tex4ht:ref: sec:license-names --></a>, and must correspond to a tree &#8220;licenses/&#8221; entry (see section&#x00A0;<a
+href="#x1-370004.5">4.5<!--tex4ht:ref: sec:licenses-dir --></a>). See
+ section&#x00A0;<a
+href="#x1-670008">8<!--tex4ht:ref: sec:dependencies --></a> for full syntax.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">KEYWORDS</span> </dt><dd
+class="description">A whitespace separated list of keywords for the ebuild. Each token must be
+ a valid keyword name, as per section&#x00A0;<a
+href="#x1-230003.1.7">3.1.7<!--tex4ht:ref: sec:keyword-names --></a>. See section&#x00A0;<a
+href="#x1-640007.3.2">7.3.2<!--tex4ht:ref: sec:keywords --></a> for full syntax.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">IUSE</span> </dt><dd
+class="description">The <span
+class="ectt-1000">USE </span>flags used by the ebuild. Any eclass that works with <span
+class="ectt-1000">USE </span>flags must also set
+ <span
+class="ectt-1000">IUSE</span>, listing only the variables used by that eclass. The package manager is responsible
+ for merging these values. See section&#x00A0;<a
+href="#x1-11000011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for discussion on which values must be
+ listed in this variable.
+ <!--l. 67--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">iuse-defaults</span></span></span> In EAPIs shown in table&#x00A0;<a
+href="#x1-62001r1">7.1<!--tex4ht:ref: tab:iuse-defaults-table --></a> as supporting <span
+class="ectt-1000">IUSE </span>defaults, any use flag
+ name in <span
+class="ectt-1000">IUSE </span>may be prefixed by at most one of a plus or a minus sign. If such a prefix
+ is present, the package manager may use it as a suggestion as to the default value of
+ the use flag if no other configuration overrides it.
+ </p></dd><dt class="description">
+<span
+class="ecbx-1000">REQUIRED_USE</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">required-use</span></span></span> Zero or more assertions that must be met by the
+ configuration of <span
+class="ectt-1000">USE </span>flags to be valid for this ebuild. See section&#x00A0;<a
+href="#x1-800008.2.7">8.2.7<!--tex4ht:ref: sec:required-use --></a> for description
+ and section&#x00A0;<a
+href="#x1-670008">8<!--tex4ht:ref: sec:dependencies --></a> for full syntax. Only in EAPIs listed in table&#x00A0;<a
+href="#x1-62002r2">7.2<!--tex4ht:ref: tab:optional-vars-table --></a> as supporting
+ <span
+class="ectt-1000">REQUIRED_USE</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">PROPERTIES</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">properties</span></span></span> Zero or more properties for this package. See section&#x00A0;<a
+href="#x1-820008.2.9">8.2.9<!--tex4ht:ref: sec:properties --></a>
+ for value meanings and section&#x00A0;<a
+href="#x1-670008">8<!--tex4ht:ref: sec:dependencies --></a> for full syntax. For EAPIs listed in table&#x00A0;<a
+href="#x1-62002r2">7.2<!--tex4ht:ref: tab:optional-vars-table --></a> as
+ having optional support, ebuilds must not rely upon the package manager recognising
+ or understanding this variable in any way.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">RESTRICT</span> </dt><dd
+class="description">Zero or more behaviour restrictions for this package. See section&#x00A0;<a
+href="#x1-810008.2.8">8.2.8<!--tex4ht:ref: sec:restrict --></a> for
+ value meanings and section&#x00A0;<a
+href="#x1-670008">8<!--tex4ht:ref: sec:dependencies --></a> for full syntax.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">DEPEND</span> </dt><dd
+class="description">See section&#x00A0;<a
+href="#x1-670008">8<!--tex4ht:ref: sec:dependencies --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">RDEPEND</span> </dt><dd
+class="description">See section&#x00A0;<a
+href="#x1-670008">8<!--tex4ht:ref: sec:dependencies --></a>. For some EAPIs, <span
+class="ectt-1000">RDEPEND </span>has special behaviour for its value if
+ unset and when used with an eclass. See section&#x00A0;<a
+href="#x1-650007.3.3">7.3.3<!--tex4ht:ref: sec:rdepend-depend --></a> for details.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">PDEPEND</span> </dt><dd
+class="description">See section&#x00A0;<a
+href="#x1-670008">8<!--tex4ht:ref: sec:dependencies --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">BDEPEND</span> </dt><dd
+class="description">See section&#x00A0;<a
+href="#x1-670008">8<!--tex4ht:ref: sec:dependencies --></a>.</dd></dl>
+<div class="table">
+
+
+<!--l. 91--><p class="noindent" ><a
+ id="x1-62001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;7.1: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">IUSE </span>defaults</span></div><!--tex4ht:label?: x1-62001r1 -->
+<div class="tabular">
+ <table id="TBL-9" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-9-1g"><col
+id="TBL-9-1" /><col
+id="TBL-9-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-9-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-9-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-9-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">IUSE </span><span
+class="ecbx-1000">defaults?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-9-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-2-1"
+class="td11"> 0 </td><td style="white-space:nowrap; text-align:left;" id="TBL-9-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-9-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-3-1"
+class="td11"> 1, 2, 3, 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-9-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-9-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 105--><p class="noindent" ><a
+ id="x1-62002r2"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;7.2: </span><span
+class="content">EAPIs supporting various ebuild-defined variables</span></div><!--tex4ht:label?: x1-62002r2 -->
+<div class="tabular">
+ <table id="TBL-10" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-10-1g"><col
+id="TBL-10-1" /><col
+id="TBL-10-2" /><col
+id="TBL-10-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-10-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-10-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-10-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">PROPERTIES</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-10-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">REQUIRED_USE</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-10-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-10-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-10-2-2"
+class="td11"> Optionally </td><td style="white-space:nowrap; text-align:left;" id="TBL-10-2-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-10-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-10-3-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-10-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-10-3-3"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-10-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-10-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">7.3.1 </span> <a
+ id="x1-630007.3.1"></a>EAPI</h4>
+<!--l. 122--><p class="noindent" >An empty or unset <span
+class="ectt-1000">EAPI </span>value is equivalent to <span
+class="ectt-1000">0</span>. Ebuilds must not assume that they will get a
+particular one of these two values if they are expecting one of these two values.
+</p><!--l. 125--><p class="noindent" >The package manager must either pre-set the <span
+class="ectt-1000">EAPI </span>variable to <span
+class="ectt-1000">0 </span>or ensure that it is unset before
+sourcing the ebuild for metadata generation. When using the ebuild for other purposes, the
+package manager must either pre-set <span
+class="ectt-1000">EAPI </span>to the value specified by the ebuild&#8217;s metadata or ensure
+that it is unset.
+</p><!--l. 130--><p class="noindent" >If any of these variables are set to invalid values, the package manager&#8217;s behaviour is
+undefined; ideally, an error in one ebuild should not prevent operations upon other ebuilds or
+packages.
+</p><!--l. 133--><p class="noindent" >If the EAPI is to be specified in an ebuild, the <span
+class="ectt-1000">EAPI </span>variable must be assigned to precisely once.
+The assignment must not be preceded by any lines other than blank lines or those that start with
+optional whitespace (spaces or tabs) followed by a <span
+class="ectt-1000"># </span>character, and the line containing the
+assignment statement must match the following regular expression:
+
+
+</p>
+<div class="verbatim" id="verbatim-6">
+^[&#x00A0;\t]*EAPI=([&#8217;"]?)([A-Za-z0-9+_.-]*)\1[&#x00A0;\t]*([&#x00A0;\t]#.*)?$</div>
+<!--l. 139--><p class="nopar" >
+</p><!--l. 141--><p class="noindent" >The package manager must determine the EAPI of an ebuild by parsing its first non-blank and
+non-comment line, using the above regular expression. If it matches, the EAPI is the substring
+matched by the capturing parentheses (<span
+class="ectt-1000">0 </span>if empty), otherwise it is <span
+class="ectt-1000">0</span>. For a recognised EAPI, the
+package manager must make sure that the <span
+class="ectt-1000">EAPI </span>value obtained by sourcing the ebuild with bash is
+identical to the EAPI obtained by parsing. The ebuild must be treated as invalid if these values are
+different.
+</p><!--l. 148--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">7.3.2 </span> <a
+ id="x1-640007.3.2"></a>Keywords</h4>
+<!--l. 151--><p class="noindent" >Keywords are used to indicate levels of stability of a package on a respective architecture <span
+class="ectt-1000">arch</span>.
+The following conventions are used:
+ </p><ul>
+ <li class="compactitem"><span
+class="ectt-1000">arch</span>: Both the package version and the ebuild are widely tested, known to work and
+ not have any serious issues on the indicated platform. This is referred to as a <span
+class="ecti-1000">stable</span>
+ <span
+class="ecti-1000">keyword</span>.
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">~arch</span>: The package version and the ebuild are believed to work and do not have
+ any known serious bugs, but more testing is required before the package version is
+ considered suitable for obtaining a stable keyword. This is referred to as an <span
+class="ecti-1000">unstable</span>
+ <span
+class="ecti-1000">keyword </span>or a <span
+class="ecti-1000">testing keyword</span>.
+ </li>
+ <li class="compactitem">No keyword: It is not known whether the package will work, or insufficient testing has
+ occurred.
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">-arch</span>: The package version will not work on the architecture.</li></ul>
+<!--l. 164--><p class="noindent" >The <span
+class="ectt-1000">-* </span>keyword is used to indicate package versions which are not worth trying to test on unlisted
+architectures.
+</p><!--l. 167--><p class="noindent" >An empty <span
+class="ectt-1000">KEYWORDS </span>variable indicates uncertain functionality on any architecture.
+</p><!--l. 169--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">7.3.3 </span> <a
+ id="x1-650007.3.3"></a>RDEPEND value</h4>
+<!--l. 172--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">rdepend-depend</span></span></span> In EAPIs listed in table&#x00A0;<a
+href="#x1-65001r3">7.3<!--tex4ht:ref: tab:rdepend-depend-table --></a> as having <span
+class="ectt-1000">RDEPEND=DEPEND</span>, if <span
+class="ectt-1000">RDEPEND </span>is unset
+(but not if it is set to an empty string) in an ebuild, when generating metadata the package
+manager must treat its value as being equal to the value of <span
+class="ectt-1000">DEPEND</span>.
+</p><!--l. 177--><p class="noindent" >When dealing with eclasses, only values set in the ebuild itself are considered for this behaviour;
+any <span
+class="ectt-1000">DEPEND </span>or <span
+class="ectt-1000">RDEPEND </span>set in an eclass does not change the implicit <span
+class="ectt-1000">RDEPEND=DEPEND </span>for the
+ebuild portion, and any <span
+class="ectt-1000">DEPEND </span>value set in an eclass does not get treated as being part of
+<span
+class="ectt-1000">RDEPEND</span>.
+</p>
+
+
+<div class="table">
+
+
+<!--l. 183--><p class="noindent" ><a
+ id="x1-65001r3"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;7.3: </span><span
+class="content">EAPIs with <span
+class="ectt-1000">RDEPEND=DEPEND </span>default</span></div><!--tex4ht:label?: x1-65001r3 -->
+<div class="tabular">
+ <table id="TBL-11" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-11-1g"><col
+id="TBL-11-1" /><col
+id="TBL-11-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-11-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-11-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-11-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">RDEPEND=DEPEND</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-11-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-11-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-11-2-2"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-11-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-11-3-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-11-3-2"
+class="td11"> No </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-11-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-11-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h3 class="sectionHead"><span class="titlemark">7.4 </span> <a
+ id="x1-660007.4"></a>Magic Ebuild-defined Variables</h3>
+<!--l. 198--><p class="noindent" >The following variables must be defined by <span
+class="ectt-1000">inherit </span>(see section&#x00A0;<a
+href="#x1-10500010.1">10.1<!--tex4ht:ref: sec:inherit --></a>), and may be considered to
+be part of the ebuild&#8217;s metadata:
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">ECLASS</span> </dt><dd
+class="description">The current eclass, or unset if there is no current eclass. This is handled magically
+ by <span
+class="ectt-1000">inherit </span>and must not be modified manually.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">INHERITED</span> </dt><dd
+class="description">List of inherited eclass names. Again, this is handled magically by <span
+class="ectt-1000">inherit</span>.</dd></dl>
+<!--l. 208--><p class="noindent" >
+</p><dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>Thus, by extension of section&#x00A0;<a
+href="#x1-600007.1">7.1<!--tex4ht:ref: sec:metadata-invariance --></a>, <span
+class="ectt-1000">inherit </span>may not be used conditionally, except
+upon constant conditions.</dd></dl>
+<!--l. 210--><p class="noindent" >The following are special variables defined by the package manager for internal use and may or
+may not be exported to the ebuild environment:
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">DEFINED_PHASES</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">defined-phases</span></span></span> A space separated arbitrarily ordered list of
+ phase names (e. g.&#x00A0;<span
+class="ectt-1000">configure setup unpack</span>) whose phase functions are defined by
+ the ebuild or an eclass inherited by the ebuild. If no phase functions are defined, a
+ single hyphen is used instead of an empty string. For EAPIs listed in table&#x00A0;<a
+href="#x1-66001r4">7.4<!--tex4ht:ref: tab:defined-phases-table --></a> as
+ having optional <span
+class="ectt-1000">DEFINED_PHASES </span>support, package managers may not rely upon the
+ metadata cache having this variable defined, and must treat an empty string as &#8220;this
+ information is not available&#8221;.</dd></dl>
+<!--l. 223--><p class="noindent" >
+</p><dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>Thus, by extension of section&#x00A0;<a
+href="#x1-600007.1">7.1<!--tex4ht:ref: sec:metadata-invariance --></a>, phase functions must not be defined based upon
+any variant condition.</dd></dl>
+<div class="table">
+
+
+<!--l. 226--><p class="noindent" ><a
+ id="x1-66001r4"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;7.4: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">DEFINED_PHASES</span></span></div><!--tex4ht:label?: x1-66001r4 -->
+<div class="tabular">
+ <table id="TBL-12" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-12-1g"><col
+id="TBL-12-1" /><col
+id="TBL-12-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-12-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-12-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-12-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">DEFINED_PHASES</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-12-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-12-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-12-2-2"
+class="td11"> Optionally </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-12-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-12-3-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-12-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-12-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-12-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+
+
+
+
+
+
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;8</span><br /><a
+ id="x1-670008"></a>Dependencies</h2>
+<h3 class="sectionHead"><span class="titlemark">8.1 </span> <a
+ id="x1-680008.1"></a>Dependency Classes</h3>
+<div class="table">
+
+
+<!--l. 7--><p class="noindent" ><a
+ id="x1-68001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;8.1: </span><span
+class="content">Dependency classes required to be satisfied for a particular phase function</span></div><!--tex4ht:label?: x1-68001r1 -->
+<div class="tabular">
+ <table id="TBL-13" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-13-1g"><col
+id="TBL-13-1" /><col
+id="TBL-13-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-13-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-13-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Phase function</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-13-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Satisfied dependency classes</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-13-2-"><td style="white-space:wrap; text-align:left;" id="TBL-13-2-1"
+class="td11"> <!--l. 14--><p class="noindent" ><span
+class="ectt-1000">pkg_pretend</span>,
+ <span
+class="ectt-1000">pkg_setup</span>,
+ <span
+class="ectt-1000">pkg_info</span>,
+ <span
+class="ectt-1000">pkg_nofetch</span> </p></td><td style="white-space:wrap; text-align:left;" id="TBL-13-2-2"
+class="td11"> <!--l. 15--><p class="noindent" >None
+ (ebuilds
+ can
+ rely
+ only
+ on
+ the
+ packages
+ in
+ the
+ system&#x00A0;set) </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-13-3-"><td style="white-space:wrap; text-align:left;" id="TBL-13-3-1"
+class="td11"> <!--l. 17--><p class="noindent" ><span
+class="ectt-1000">src_unpack</span>,
+ <span
+class="ectt-1000">src_prepare</span>,
+ <span
+class="ectt-1000">src_configure</span>,
+ <span
+class="ectt-1000">src_compile</span>,
+ <span
+class="ectt-1000">src_test</span>,
+ <span
+class="ectt-1000">src_install</span> </p></td><td style="white-space:wrap; text-align:left;" id="TBL-13-3-2"
+class="td11"> <!--l. 18--><p class="noindent" ><span
+class="ectt-1000">DEPEND</span>,
+ <span
+class="ectt-1000">BDEPEND</span> </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-13-4-"><td style="white-space:wrap; text-align:left;" id="TBL-13-4-1"
+class="td11"> <!--l. 20--><p class="noindent" ><span
+class="ectt-1000">pkg_preinst</span>,
+ <span
+class="ectt-1000">pkg_postinst</span>,
+ <span
+class="ectt-1000">pkg_prerm</span>,
+ <span
+class="ectt-1000">pkg_postrm</span> </p></td><td style="white-space:wrap; text-align:left;" id="TBL-13-4-2"
+class="td11"> <!--l. 21--><p class="noindent" ><span
+class="ectt-1000">RDEPEND</span>
+ (unless
+ the
+ particular
+ dependency
+ results
+ in
+ a
+ circular
+ dependency,
+ in
+ which
+ case
+ it
+ may
+ be
+ installed
+ later) </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-13-5-"><td style="white-space:wrap; text-align:left;" id="TBL-13-5-1"
+class="td11"> <!--l. 24--><p class="noindent" ><span
+class="ectt-1000">pkg_config</span> </p></td><td style="white-space:wrap; text-align:left;" id="TBL-13-5-2"
+class="td11"> <!--l. 24--><p class="noindent" ><span
+class="ectt-1000">RDEPEND</span>,
+ <span
+class="ectt-1000">PDEPEND</span> </p></td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-13-6-"><td style="white-space:wrap; text-align:left;" id="TBL-13-6-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 29--><p class="noindent" ><a
+ id="x1-68002r2"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;8.2: </span><span
+class="content">Summary of other interfaces related to dependency classes</span></div><!--tex4ht:label?: x1-68002r2 -->
+<div class="tabular">
+ <table id="TBL-14" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-14-1g"><col
+id="TBL-14-1" /><col
+id="TBL-14-2" /><col
+id="TBL-14-3" /><col
+id="TBL-14-4" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-14-1-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-1-1"
+class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-14-1-2"
+class="td11"> <span
+class="ectt-1000">BDEPEND </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-1-3"
+class="td11"> <span
+class="ectt-1000">DEPEND </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-1-4"
+class="td11"> <span
+class="ectt-1000">RDEPEND</span>, <span
+class="ectt-1000">PDEPEND </span></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-14-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-2-1"
+class="td11"> Binary compatible with </td><td style="white-space:nowrap; text-align:left;" id="TBL-14-2-2"
+class="td11"> <span
+class="ectt-1000">CBUILD </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-2-3"
+class="td11"> <span
+class="ectt-1000">CHOST </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-2-4"
+class="td11"> <span
+class="ectt-1000">CHOST </span></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-14-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-3-1"
+class="td11"> Base unprefixed path </td><td style="white-space:nowrap; text-align:left;" id="TBL-14-3-2"
+class="td11"> <span
+class="ectt-1000">/ </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-3-3"
+class="td11"> <span
+class="ectt-1000">${SYSROOT} </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-3-4"
+class="td11"> <span
+class="ectt-1000">${ROOT} </span></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-14-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-4-1"
+class="td11"> Relevant offset-prefix </td><td style="white-space:nowrap; text-align:left;" id="TBL-14-4-2"
+class="td11"> <span
+class="ectt-1000">${BROOT} </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-4-3"
+class="td11"> <span
+class="ectt-1000">${EPREFIX} </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-4-4"
+class="td11"> <span
+class="ectt-1000">${EPREFIX} </span></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-14-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-5-1"
+class="td11"> Path combined with prefix </td><td style="white-space:nowrap; text-align:left;" id="TBL-14-5-2"
+class="td11"> <span
+class="ectt-1000">${BROOT} </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-5-3"
+class="td11"> <span
+class="ectt-1000">${ESYSROOT} </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-5-4"
+class="td11"> <span
+class="ectt-1000">${EROOT} </span></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-14-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-6-1"
+class="td11"> PM query command option </td><td style="white-space:nowrap; text-align:left;" id="TBL-14-6-2"
+class="td11"> <span
+class="ectt-1000">-b </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-6-3"
+class="td11"> <span
+class="ectt-1000">-d </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-14-6-4"
+class="td11"> <span
+class="ectt-1000">-r </span></td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-14-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-14-7-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<!--l. 44--><p class="noindent" >There are three classes of dependencies supported by ebuilds:
+ </p><ul>
+ <li class="compactitem">Build dependencies (<span
+class="ectt-1000">DEPEND</span>). These must be installed and usable before any of the
+ ebuild <span
+class="ectt-1000">src_* </span>phase functions is executed. These may not be installed at all if a binary
+ package is being merged.
+ </li>
+ <li class="compactitem">Runtime dependencies (<span
+class="ectt-1000">RDEPEND</span>). These must be installed and usable before the results
+ of an ebuild merging are treated as usable.
+ </li>
+ <li class="compactitem">Post dependencies (<span
+class="ectt-1000">PDEPEND</span>). These must be installed at some point before the package
+ manager finishes the batch of installs.</li></ul>
+<!--l. 56--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">bdepend</span></span></span> Additionally, in EAPIs listed in table&#x00A0;<a
+href="#x1-68003r3">8.3<!--tex4ht:ref: tab:depend-table --></a> as supporting <span
+class="ectt-1000">BDEPEND</span>, the build dependencies
+are split into two subclasses:
+ </p><ul>
+ <li class="compactitem"><span
+class="ectt-1000">BDEPEND </span>build dependencies that are binary compatible with the native build system
+ (<span
+class="ectt-1000">CBUILD</span>). The ebuild is allowed to call binary executables installed by this kind of
+ dependency.
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">DEPEND </span>build dependencies that are binary compatible with the system being built
+ (<span
+class="ectt-1000">CHOST</span>). The ebuild must not execute binary executables installed by this kind of
+ dependency.</li></ul>
+<div class="table">
+
+
+<!--l. 69--><p class="noindent" ><a
+ id="x1-68003r3"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;8.3: </span><span
+class="content">EAPIs supporting additional dependency types</span></div><!--tex4ht:label?: x1-68003r3 -->
+<div class="tabular">
+ <table id="TBL-15" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-15-1g"><col
+id="TBL-15-1" /><col
+id="TBL-15-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-15-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-15-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-15-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">BDEPEND</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-15-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-15-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-15-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-15-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-15-3-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-15-3-2"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-15-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-15-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<!--l. 82--><p class="noindent" >Table&#x00A0;<a
+href="#x1-68001r1">8.1<!--tex4ht:ref: tab:phase-function-dependency-classes --></a> lists dependencies which must be satisfied before a particular phase function is executed.
+Table&#x00A0;<a
+href="#x1-68002r2">8.2<!--tex4ht:ref: tab:dep-class-api --></a> summarises additional interfaces related to the dependency classes.
+</p><!--l. 86--><p class="noindent" >In addition, <span
+class="ectt-1000">SRC_URI</span>, <span
+class="ectt-1000">HOMEPAGE</span>, <span
+class="ectt-1000">RESTRICT</span>, <span
+class="ectt-1000">PROPERTIES</span>, <span
+class="ectt-1000">LICENSE </span>and <span
+class="ectt-1000">REQUIRED_USE </span>use
+dependency-style specifications to specify their values.
+</p>
+<h3 class="sectionHead"><span class="titlemark">8.2 </span> <a
+ id="x1-690008.2"></a>Dependency Specification Format</h3>
+<!--l. 92--><p class="noindent" >The following elements are recognised in at least one class of specification. All elements
+must be surrounded on both sides by whitespace, except at the start and end of the
+string.
+</p><!--l. 96--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">A package dependency specification. Permitted in <span
+class="ectt-1000">DEPEND</span>, <span
+class="ectt-1000">BDEPEND</span>, <span
+class="ectt-1000">RDEPEND</span>, <span
+class="ectt-1000">PDEPEND</span>.
+ </li>
+ <li class="compactitem">A URI, in the form <span
+class="ectt-1000">proto://host/path</span>. Permitted in <span
+class="ectt-1000">SRC_URI </span>and <span
+class="ectt-1000">HOMEPAGE</span>. In
+ EAPIs listed in table&#x00A0;<a
+href="#x1-69001r4">8.4<!--tex4ht:ref: tab:uri-arrows-table --></a> as supporting <span
+class="ectt-1000">SRC_URI </span>arrows, may optionally be followed
+ by whitespace, then <span
+class="ectt-1000">-&#x003E;</span>, then whitespace, then a simple filename when in <span
+class="ectt-1000">SRC_URI</span>. For
+ <span
+class="ectt-1000">SRC_URI </span>behaviour, see section&#x00A0;<a
+href="#x1-830008.2.10">8.2.10<!--tex4ht:ref: sec:src-uri-behaviour --></a>.
+ </li>
+ <li class="compactitem">A flat filename. Permitted in <span
+class="ectt-1000">SRC_URI</span>.
+ </li>
+ <li class="compactitem">A license name (e. g.&#x00A0;<span
+class="ectt-1000">GPL-2</span>). Permitted in <span
+class="ectt-1000">LICENSE</span>.
+ </li>
+ <li class="compactitem">A use flag name, optionally preceded by an exclamation mark. Permitted in
+ <span
+class="ectt-1000">REQUIRED_USE</span>.
+ </li>
+ <li class="compactitem">A simple string. Permitted in <span
+class="ectt-1000">RESTRICT </span>and <span
+class="ectt-1000">PROPERTIES</span>.
+ </li>
+ <li class="compactitem">An all-of group, which consists of an open parenthesis, followed by whitespace, followed
+ by one or more of (a dependency item of any kind followed by whitespace), followed by a
+ close parenthesis. More formally: <span
+class="ectt-1000">all-of ::= &#8217;(&#8217; whitespace (item whitespace)+</span>
+ <span
+class="ectt-1000">&#8217;)&#8217;</span>. Permitted in all specification style variables.
+ </li>
+ <li class="compactitem">An any-of group, which consists of the string <span
+class="ectt-1000">||</span>, followed by whitespace, followed by
+ an open parenthesis, followed by whitespace, followed by one or more of (a dependency
+ item of any kind followed by whitespace), followed by a close parenthesis. More
+ formally: <span
+class="ectt-1000">any-of ::= &#8217;||&#8217; whitespace &#8217;(&#8217; whitespace (item whitespace)+ &#8217;)&#8217;</span>.
+ Permitted in <span
+class="ectt-1000">DEPEND</span>, <span
+class="ectt-1000">BDEPEND</span>, <span
+class="ectt-1000">RDEPEND</span>, <span
+class="ectt-1000">PDEPEND</span>, <span
+class="ectt-1000">LICENSE</span>, <span
+class="ectt-1000">REQUIRED_USE</span>.
+ </li>
+ <li class="compactitem">An exactly-one-of group, which has the same format as the any-of group, but begins
+ with the string <span
+class="ectt-1000">^^ </span>instead. Permitted in <span
+class="ectt-1000">REQUIRED_USE</span>.
+ </li>
+ <li class="compactitem"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">at-most-one-of</span></span></span> An at-most-one-of group, which has the same format as the any-of
+ group, but begins with the string <span
+class="ectt-1000">??</span>&#x00A0;instead. Permitted in <span
+class="ectt-1000">REQUIRED_USE </span>in EAPIs
+ listed in table&#x00A0;<a
+href="#x1-69002r5">8.5<!--tex4ht:ref: tab:at-most-one-of-table --></a> as supporting <span
+class="ectt-1000">REQUIRED_USE ??</span>&#x00A0;groups.
+ </li>
+ <li class="compactitem">A use-conditional group, which consists of an optional exclamation mark, followed by
+ a use flag name, followed by a question mark, followed by whitespace, followed by an
+ open parenthesis, followed by whitespace, followed by one or more of (a dependency
+ item of any kind followed by whitespace), followed by a close parenthesis. More
+
+
+ formally: <span
+class="ectt-1000">use-conditional ::= &#8217;!&#8217;?&#x00A0;flag-name &#8217;?&#8217;&#x00A0;whitespace &#8217;(&#8217; whitespace</span>
+ <span
+class="ectt-1000">(item whitespace)+ &#8217;)&#8217;</span>. Permitted in all specification style variables.</li></ul>
+<!--l. 130--><p class="noindent" >In particular, note that whitespace is not optional.
+</p>
+<div class="table">
+
+
+<!--l. 133--><p class="noindent" ><a
+ id="x1-69001r4"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;8.4: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">SRC_URI </span>arrows</span></div><!--tex4ht:label?: x1-69001r4 -->
+<div class="tabular">
+ <table id="TBL-16" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-16-1g"><col
+id="TBL-16-1" /><col
+id="TBL-16-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-16-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-16-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-16-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">SRC_URI </span><span
+class="ecbx-1000">arrows?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-16-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-2-1"
+class="td11"> 0, 1 </td><td style="white-space:nowrap; text-align:left;" id="TBL-16-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-16-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-3-1"
+class="td11"> 2, 3, 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-16-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-16-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-16-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 147--><p class="noindent" ><a
+ id="x1-69002r5"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;8.5: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">REQUIRED_USE ??</span>&#x00A0;groups</span></div><!--tex4ht:label?: x1-69002r5 -->
+<div class="tabular">
+ <table id="TBL-17" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-17-1g"><col
+id="TBL-17-1" /><col
+id="TBL-17-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-17-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-17-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-17-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">REQUIRED_USE ??</span><span
+class="ecbx-1000">&#x00A0;groups?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-17-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-17-2-1"
+class="td11"> 0, 1, 2, 3, 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-17-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-17-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-17-3-1"
+class="td11"> 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-17-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-17-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-17-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">8.2.1 </span> <a
+ id="x1-700008.2.1"></a>All-of dependency specifications</h4>
+<!--l. 162--><p class="noindent" >In an all-of group, all of the child elements must be matched.
+</p><!--l. 164--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">8.2.2 </span> <a
+ id="x1-710008.2.2"></a>USE-conditional dependency specifications</h4>
+<!--l. 166--><p class="noindent" >In a use-conditional group, if the associated use flag is enabled (or disabled if it has an exclamation
+mark prefix), all of the child elements must be matched.
+</p><!--l. 169--><p class="noindent" >It is an error for a flag to be used if it is not included in <span
+class="ectt-1000">IUSE_EFFECTIVE </span>as described in
+section&#x00A0;<a
+href="#x1-11000011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a>.
+</p><!--l. 172--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">8.2.3 </span> <a
+ id="x1-720008.2.3"></a>Any-of dependency specifications</h4>
+<!--l. 174--><p class="noindent" >Any use-conditional group that is an immediate child of an any-of group, if not enabled (disabled
+for an exclamation mark prefixed use flag name), is not considered a member of the any-of group
+for match purposes.
+</p><!--l. 178--><p class="noindent" >In an any-of group, at least one immediate child element must be matched. A blocker
+is considered to be matched if its associated package dependency specification is not
+matched.
+</p><!--l. 181--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">empty-dep-groups</span></span></span> In EAPIs specified in table&#x00A0;<a
+href="#x1-73001r6">8.6<!--tex4ht:ref: tab:empty-dep-groups --></a>, an empty any-of group counts as being
+matched.
+</p><!--l. 184--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">8.2.4 </span> <a
+ id="x1-730008.2.4"></a>Exactly-one-of dependency specifications</h4>
+<!--l. 186--><p class="noindent" >Any use-conditional group that is an immediate child of an exactly-one-of group, if not enabled
+(disabled for an exclamation mark prefixed use flag name), is not considered a member of the
+exactly-one-of group for match purposes.
+</p><!--l. 190--><p class="noindent" >In an exactly-one-of group, exactly one immediate child element must be matched.
+</p><!--l. 192--><p class="noindent" >In EAPIs specified in table&#x00A0;<a
+href="#x1-73001r6">8.6<!--tex4ht:ref: tab:empty-dep-groups --></a>, an empty exactly-one-of group counts as being matched.
+</p>
+<div class="table">
+
+
+<!--l. 196--><p class="noindent" ><a
+ id="x1-73001r6"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;8.6: </span><span
+class="content">Matching of empty dependency groups in EAPIs</span></div><!--tex4ht:label?: x1-73001r6 -->
+<div class="tabular">
+ <table id="TBL-18" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-18-1g"><col
+id="TBL-18-1" /><col
+id="TBL-18-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-18-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-18-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-18-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Empty </span><span
+class="ectt-1000">|| </span><span
+class="ecbx-1000">and </span><span
+class="ectt-1000">^^ </span><span
+class="ecbx-1000">groups are matched?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-18-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-18-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-18-2-2"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-18-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-18-3-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-18-3-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-18-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-18-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">8.2.5 </span> <a
+ id="x1-740008.2.5"></a>At-most-one-of dependency specifications</h4>
+<!--l. 212--><p class="noindent" >Any use-conditional group that is an immediate child of an at-most-one-of group, if not enabled
+(disabled for an exclamation mark prefixed use flag name), is not considered a member of the
+at-most-one-of group for match purposes.
+</p><!--l. 216--><p class="noindent" >In an at-most-one-of group, at most one immediate child element must be matched.
+</p><!--l. 218--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">8.2.6 </span> <a
+ id="x1-750008.2.6"></a>Package dependency specifications</h4>
+<!--l. 220--><p class="noindent" >A package dependency can be in one of the following base formats. A package manager must warn
+or error on non-compliant input.
+</p><!--l. 224--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">A simple <span
+class="ectt-1000">category/package </span>name.
+ </li>
+ <li class="compactitem">An operator, as described
+ in section&#x00A0;<a
+href="#x1-760008.2.6.1">8.2.6.1<!--tex4ht:ref: sec:dep-operator --></a>, followed immediately by <span
+class="ectt-1000">category/package</span>, followed by a hyphen,
+ followed by a version specification.</li></ul>
+<!--l. 229--><p class="noindent" >In EAPIs shown in table&#x00A0;<a
+href="#x1-75001r7">8.7<!--tex4ht:ref: tab:slot-deps-table --></a> as supporting <span
+class="ectt-1000">SLOT </span>dependencies, either of the above formats may
+additionally be suffixed by a <span
+class="ectt-1000">:slot </span>restriction, as described in section&#x00A0;<a
+href="#x1-780008.2.6.3">8.2.6.3<!--tex4ht:ref: sec:slot-dep --></a>. A package manager
+must warn or error if slot dependencies are used with an EAPI not supporting <span
+class="ectt-1000">SLOT</span>
+dependencies.
+</p><!--l. 234--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">use-deps</span></span></span> In EAPIs shown in table&#x00A0;<a
+href="#x1-75002r8">8.8<!--tex4ht:ref: tab:use-deps-table --></a> as supporting 2-style or 4-style <span
+class="ectt-1000">USE </span>dependencies, a
+specification may additionally be suffixed by at most one 2-style or 4-style <span
+class="ectt-1000">[use] </span>restriction, as
+described in section&#x00A0;<a
+href="#x1-790008.2.6.4">8.2.6.4<!--tex4ht:ref: sec:use-dep --></a>. A package manager must warn or error if this feature is used with an
+EAPI not supporting use dependencies.
+</p><!--l. 239--><p class="noindent" >
+</p><dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>Order is important. The slot restriction must come before use dependencies.</dd></dl>
+<div class="table">
+
+
+<!--l. 242--><p class="noindent" ><a
+ id="x1-75001r7"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;8.7: </span><span
+class="content">Support for <span
+class="ectt-1000">SLOT </span>dependencies and sub-slots in EAPIs</span></div><!--tex4ht:label?: x1-75001r7 -->
+<div class="tabular">
+ <table id="TBL-19" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-19-1g"><col
+id="TBL-19-1" /><col
+id="TBL-19-2" /><col
+id="TBL-19-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-19-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-19-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-19-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">SLOT </span><span
+class="ecbx-1000">dependencies?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-19-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports sub-slots?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-19-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-2-1"
+class="td11"> 0 </td><td style="white-space:nowrap; text-align:left;" id="TBL-19-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-19-2-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-19-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-3-1"
+class="td11"> 1, 2, 3, 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-19-3-2"
+class="td11"> Named only </td><td style="white-space:nowrap; text-align:left;" id="TBL-19-3-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-19-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-4-1"
+class="td11"> 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-19-4-2"
+class="td11"> Named and operator </td><td style="white-space:nowrap; text-align:left;" id="TBL-19-4-3"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-19-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-19-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 258--><p class="noindent" ><a
+ id="x1-75002r8"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;8.8: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">USE </span>dependencies</span></div><!--tex4ht:label?: x1-75002r8 -->
+<div class="tabular">
+ <table id="TBL-20" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-20-1g"><col
+id="TBL-20-1" /><col
+id="TBL-20-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-20-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-20-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-20-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">USE </span><span
+class="ecbx-1000">dependencies?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-20-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-20-2-1"
+class="td11"> 0, 1 </td><td style="white-space:nowrap; text-align:left;" id="TBL-20-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-20-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-20-3-1"
+class="td11"> 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-20-3-2"
+class="td11"> 2-style </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-20-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-20-4-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-20-4-2"
+class="td11"> 4-style </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-20-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-20-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h5 class="subsubsectionHead"><span class="titlemark">8.2.6.1 </span> <a
+ id="x1-760008.2.6.1"></a>Operators</h5>
+<!--l. 275--><p class="noindent" >The following operators are available:
+ </p><dl class="description"><dt class="description">
+<span
+class="ectt-1000">&#x003C;</span> </dt><dd
+class="description">Strictly less than the specified version.
+ </dd><dt class="description">
+<span
+class="ectt-1000">&#x003C;=</span> </dt><dd
+class="description">Less than or equal to the specified version.
+ </dd><dt class="description">
+<span
+class="ectt-1000">=</span> </dt><dd
+class="description">Exactly equal to the specified version. Special exception: if the version specified has an
+ asterisk immediately following it, then only the given number of version components is
+ used for comparison, i. e.&#x00A0;the asterisk acts as a wildcard for any further components.
+ When an asterisk is used, the specification must remain valid if the asterisk were
+ removed. (An asterisk used with any other operator is illegal.)
+ </dd><dt class="description">
+<span
+class="ectt-1000">~</span> </dt><dd
+class="description">Equal to the specified version when revision parts are ignored.
+ </dd><dt class="description">
+<span
+class="ectt-1000">&#x003E;=</span> </dt><dd
+class="description">Greater than or equal to the specified version.
+ </dd><dt class="description">
+<span
+class="ectt-1000">&#x003E;</span> </dt><dd
+class="description">Strictly greater than the specified version.</dd></dl>
+<!--l. 290--><p class="noindent" >
+</p>
+<h5 class="subsubsectionHead"><span class="titlemark">8.2.6.2 </span> <a
+ id="x1-770008.2.6.2"></a>Block operator</h5>
+<!--l. 292--><p class="noindent" >If the specification is prefixed with one or two exclamation marks, the named dependency is a
+block rather than a requirement&#8212;that is to say, the specified package must not be installed, with
+the following exceptions:
+</p><!--l. 297--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">Blocks on a package provided exclusively by the ebuild do not count.
+ </li>
+ <li class="compactitem">Weak blocks on the package version of the ebuild itself do not count.</li></ul>
+<!--l. 301--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">bang-strength</span></span></span> There are two strengths of block: weak and strong. A weak block may be ignored
+by the package manager, so long as any blocked package will be uninstalled later on. A strong
+block must not be ignored. The mapping from one or two exclamation marks to strength is
+described in table&#x00A0;<a
+href="#x1-77001r9">8.9<!--tex4ht:ref: tab:bang-strength-table --></a>.
+</p>
+<div class="table">
+
+
+<!--l. 307--><p class="noindent" ><a
+ id="x1-77001r9"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;8.9: </span><span
+class="content">Exclamation mark strengths for EAPIs</span></div><!--tex4ht:label?: x1-77001r9 -->
+<div class="tabular">
+ <table id="TBL-21" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-21-1g"><col
+id="TBL-21-1" /><col
+id="TBL-21-2" /><col
+id="TBL-21-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-21-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-21-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-21-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">!</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-21-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">!!</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-21-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-21-2-1"
+class="td11"> 0, 1 </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-2-2"
+class="td11"> Unspecified </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-2-3"
+class="td11"> Forbidden </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-21-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-21-3-1"
+class="td11"> 2, 3, 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-3-2"
+class="td11"> Weak </td><td style="white-space:nowrap; text-align:left;" id="TBL-21-3-3"
+class="td11"> Strong </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-21-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-21-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h5 class="subsubsectionHead"><span class="titlemark">8.2.6.3 </span> <a
+ id="x1-780008.2.6.3"></a>Slot dependencies</h5>
+<!--l. 324--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">slot-deps</span></span></span> A named slot dependency consists of a colon followed by a slot name. A specification
+with a named slot dependency matches only if the slot of the matched package is equal to the slot
+specified. If the slot of the package to match cannot be determined (e. g.&#x00A0;because it is not a
+supported <span
+class="ectt-1000">EAPI</span>), the match is treated as unsuccessful.
+</p><!--l. 329--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">sub-slot</span></span></span> In EAPIs shown in table&#x00A0;<a
+href="#x1-75001r7">8.7<!--tex4ht:ref: tab:slot-deps-table --></a> as supporting sub-slots, a slot dependency may
+contain an optional sub-slot part that follows the regular slot and is delimited by a <span
+class="ectt-1000">/</span>
+character.
+</p><!--l. 333--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">slot-operator-deps</span></span></span> An operator slot dependency consists of a colon followed by one of the
+following operators:
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">*</span> </dt><dd
+class="description">Indicates that any slot value is acceptable. In addition, for runtime dependencies, indicates
+ that the package will not break if the matched package is uninstalled and replaced by
+ a different matching package in a different slot.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">=</span> </dt><dd
+class="description">Indicates that any slot value is acceptable. In addition, for runtime dependencies, indicates
+ that the package will break unless a matching package with slot and sub-slot equal to
+ the slot and sub-slot of the best version installed as a build-time (<span
+class="ectt-1000">DEPEND</span>) dependency
+ is available.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">slot=</span> </dt><dd
+class="description">Indicates that only a specific slot value is acceptable, and otherwise behaves
+ identically to the plain equals slot operator.</dd></dl>
+<!--l. 348--><p class="noindent" >To implement the equals slot operator, the package manager will need to store the slot/sub-slot
+pair of the best installed version of the matching package. This syntax is only for package manager
+use and must not be used by ebuilds. The package manager may do this by inserting the
+appropriate slot/sub-slot pair between the colon and equals sign when saving the package&#8217;s
+dependencies. The sub-slot part must not be omitted here (when the SLOT variable omits the
+sub-slot part, the package is considered to have an implicit sub-slot which is equal to the regular
+slot).
+</p><!--l. 355--><p class="noindent" >Whenever the equals slot operator is used in an enabled dependency group, the dependencies
+(<span
+class="ectt-1000">DEPEND</span>) must ensure that a matching package is installed at build time. It is invalid to use the
+equals slot operator inside <span
+class="ectt-1000">PDEPEND </span>or inside any-of dependency specifications.
+</p><!--l. 359--><p class="noindent" >
+</p>
+<h5 class="subsubsectionHead"><span class="titlemark">8.2.6.4 </span> <a
+ id="x1-790008.2.6.4"></a>2-style and 4-style USE dependencies</h5>
+<!--l. 362--><p class="noindent" >A 2-style or 4-style use dependency consists of one of the following:
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">[opt]</span> </dt><dd
+class="description">The flag must be enabled.
+
+
+ </dd><dt class="description">
+<span
+class="ecbx-1000">[opt=]</span> </dt><dd
+class="description">The flag must be enabled if the flag is enabled for the package with the dependency,
+ or disabled otherwise.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">[!opt=]</span> </dt><dd
+class="description">The flag must be disabled if the flag is enabled for the package with the dependency,
+ or enabled otherwise.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">[opt?]</span> </dt><dd
+class="description">The flag must be enabled if the flag is enabled for the package with the dependency.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">[!opt?]</span> </dt><dd
+class="description">The flag must be disabled if the use flag is disabled for the package with the
+ dependency.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">[-opt]</span> </dt><dd
+class="description">The flag must be disabled.</dd></dl>
+<!--l. 377--><p class="noindent" >Multiple requirements may be combined using commas, e. g.&#x00A0;<span
+class="ectt-1000">[first,-second,third?]</span>.
+</p><!--l. 379--><p class="noindent" >When multiple requirements are specified, all must match for a successful match.
+</p><!--l. 381--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">use-dep-defaults</span></span></span> In a 4-style use dependency, the flag name may immediately be followed by a
+<span
+class="ecti-1000">default </span>specified by either <span
+class="ectt-1000">(+) </span>or <span
+class="ectt-1000">(-)</span>. The former indicates that, when applying the use
+dependency to a package that does not have the flag in question in <span
+class="ectt-1000">IUSE_REFERENCEABLE</span>, the
+package manager shall behave as if the flag were present and enabled; the latter, present and
+disabled.
+</p><!--l. 387--><p class="noindent" >Unless a 4-style default is specified, it is an error for a use dependency to be applied to an ebuild
+which does not have the flag in question in <span
+class="ectt-1000">IUSE_REFERENCEABLE</span>.
+</p><!--l. 392--><p class="noindent" >
+</p><dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>By extension of the above, a default that could reference an ebuild using an EAPI
+not supporting profile <span
+class="ectt-1000">IUSE </span>injections cannot rely upon any particular behaviour for flags
+that would not have to be part of <span
+class="ectt-1000">IUSE</span>.</dd></dl>
+<!--l. 394--><p class="noindent" >It is an error for an ebuild to use a conditional use dependency when that ebuild does not have the
+flag in <span
+class="ectt-1000">IUSE_EFFECTIVE</span>.
+</p><!--l. 397--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">8.2.7 </span> <a
+ id="x1-800008.2.7"></a>USE state constraints</h4>
+<!--l. 399--><p class="noindent" ><span
+class="ectt-1000">REQUIRED_USE </span>contains a list of assertions that must be met by the configuration of <span
+class="ectt-1000">USE </span>flags to be
+valid for this ebuild. In order to be matched, a <span
+class="ectt-1000">USE </span>flag in a terminal element must be enabled (or
+disabled if it has an exclamation mark prefix).
+</p><!--l. 403--><p class="noindent" >If the package manager encounters a package version where <span
+class="ectt-1000">REQUIRED_USE </span>assertions are not
+met, it must treat this package version as if it was masked. No phase functions must be
+called.
+</p><!--l. 406--><p class="noindent" >It is an error for a flag to be used if it is not included in <span
+class="ectt-1000">IUSE_EFFECTIVE</span>.
+</p><!--l. 408--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">8.2.8 </span> <a
+ id="x1-810008.2.8"></a>Restrict</h4>
+<!--l. 411--><p class="noindent" >The following tokens are permitted inside <span
+class="ectt-1000">RESTRICT</span>:
+
+
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">mirror</span> </dt><dd
+class="description">The package&#8217;s <span
+class="ectt-1000">SRC_URI </span>entries may not be mirrored, and mirrors should not be
+ checked when fetching.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">fetch</span> </dt><dd
+class="description">The package&#8217;s <span
+class="ectt-1000">SRC_URI </span>entries may not be downloaded automatically. If entries are
+ not available, <span
+class="ectt-1000">pkg_nofetch </span>is called. Implies <span
+class="ectt-1000">mirror</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">strip</span> </dt><dd
+class="description">No stripping of debug symbols from files to be installed may be performed. In EAPIs
+ listed in table&#x00A0;<a
+href="#x1-131001r15">12.15<!--tex4ht:ref: tab:staging-area-commands --></a> as supporting controllable stripping, this behaviour may be altered
+ by the <span
+class="ectt-1000">dostrip </span>command.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">userpriv</span> </dt><dd
+class="description">The package manager may not drop root privileges when building the package.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">test</span> </dt><dd
+class="description">The <span
+class="ectt-1000">src_test </span>phase must not be run.</dd></dl>
+<!--l. 425--><p class="noindent" >Package managers may recognise other tokens, but ebuilds may not rely upon them being
+supported.
+</p><!--l. 427--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">8.2.9 </span> <a
+ id="x1-820008.2.9"></a>Properties</h4>
+<!--l. 430--><p class="noindent" >The following tokens are permitted inside <span
+class="ectt-1000">PROPERTIES</span>:
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">interactive</span> </dt><dd
+class="description">The package may require interaction with the user via the tty.</dd></dl>
+<!--l. 436--><p class="noindent" >Ebuilds may not rely upon any token being supported.
+</p><!--l. 438--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">8.2.10 </span> <a
+ id="x1-830008.2.10"></a>SRC_URI</h4>
+<!--l. 441--><p class="noindent" >All filename components that are enabled (i. e.&#x00A0;not inside a use-conditional block that is not
+matched) in <span
+class="ectt-1000">SRC_URI </span>must be available in the <span
+class="ectt-1000">DISTDIR </span>directory. In addition, these components
+are used to make the <span
+class="ectt-1000">A </span>and <span
+class="ectt-1000">AA </span>variables.
+</p><!--l. 445--><p class="noindent" >If a component contains a full URI with protocol, that download location must be used. Package
+managers may also consult mirrors for their files.
+</p><!--l. 448--><p class="noindent" >The special <span
+class="ectt-1000">mirror:// </span>protocol must be supported. See section&#x00A0;<a
+href="#x1-340004.4.2">4.4.2<!--tex4ht:ref: sec:thirdpartymirrors --></a> for mirror details.
+</p><!--l. 451--><p class="noindent" >If a simple filename rather than a full URI is provided, the package manager can only use mirrors
+to download the file.
+</p><!--l. 454--><p class="noindent" >The <span
+class="ectt-1000">RESTRICT </span>metadata key can be used to impose additional restrictions upon downloading&#8212;see
+section&#x00A0;<a
+href="#x1-810008.2.8">8.2.8<!--tex4ht:ref: sec:restrict --></a> for details.
+</p><!--l. 457--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-uri-arrows</span></span></span> In EAPIs supporting arrows, if an arrow is used, the filename used when
+saving to <span
+class="ectt-1000">DISTDIR </span>shall instead be the name on the right of the arrow. When consulting
+mirrors (except for those explicitly listed on the left of the arrow, if <span
+class="ectt-1000">mirror:// </span>is used),
+the filename to the right of the arrow shall be requested instead of the filename in the
+
+
+URI.
+
+
+
+
+
+
+</p>
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;9</span><br /><a
+ id="x1-840009"></a>Ebuild-defined Functions</h2>
+<h3 class="sectionHead"><span class="titlemark">9.1 </span> <a
+ id="x1-850009.1"></a>List of Functions</h3>
+<!--l. 6--><p class="noindent" >The following is a list of functions that an ebuild, or eclass, may define, and which will be called by
+the package manager as part of the build and/or install process. In all cases the package manager
+must provide a default implementation of these functions; unless otherwise stated this must be a
+no-op. Most functions must assume only that they have write access to the package&#8217;s working
+directory (the <span
+class="ectt-1000">WORKDIR </span>environment variable; see section&#x00A0;<a
+href="#x1-109001r1">11.1<!--tex4ht:ref: env-var-WORKDIR --></a>), and the temporary directory
+<span
+class="ectt-1000">T</span>; exceptions are noted below. All functions may assume that they have read access
+to all system libraries, binaries and configuration files that are accessible to normal
+users.
+</p><!--l. 15--><p class="noindent" >The environment for functions run outside of the build sequence (that is, <span
+class="ectt-1000">pkg_config</span>, <span
+class="ectt-1000">pkg_info</span>,
+<span
+class="ectt-1000">pkg_prerm </span>and <span
+class="ectt-1000">pkg_postrm</span>) must be the environment used for the build of the package, not the
+current configuration.
+</p><!--l. 19--><p class="noindent" >Ebuilds must not call nor assume the existence of any phase functions.
+</p><!--l. 21--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">9.1.1 </span> <a
+ id="x1-860009.1.1"></a>Initial working directories</h4>
+<!--l. 24--><p class="noindent" >Some functions may assume that their initial working directory is set to a particular location; these
+are noted below. If no initial working directory is mandated, it may be set to anything and the
+ebuild must not rely upon a particular location for it. The ebuild <span
+class="ecti-1000">may </span>assume that the initial
+working directory for any phase is a trusted location that may only be written to by a privileged
+user and group.
+</p><!--l. 30--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">s-workdir-fallback</span></span></span> Some functions are described as having an initial working directory of
+<span
+class="ectt-1000">S </span>with an error or fallback to <span
+class="ectt-1000">WORKDIR</span>. For EAPIs listed in table&#x00A0;<a
+href="#x1-86001r1">9.1<!--tex4ht:ref: tab:s-fallback-table --></a> as having the
+fallback, this means that if <span
+class="ectt-1000">S </span>is not a directory before the start of the phase function, the
+initial working directory shall be <span
+class="ectt-1000">WORKDIR </span>instead. For EAPIs where it is a conditional
+error, if <span
+class="ectt-1000">S </span>is not a directory before the start of the phase function, it is a fatal error,
+unless all of the following conditions are true, in which case the fallback to <span
+class="ectt-1000">WORKDIR </span>is
+used:
+</p><!--l. 39--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">The <span
+class="ectt-1000">A </span>variable contains no items.
+ </li>
+ <li class="compactitem">The phase function in question is not in <span
+class="ectt-1000">DEFINED_PHASES</span>.
+ </li>
+ <li class="compactitem">None of the phase functions <span
+class="ectt-1000">unpack</span>, <span
+class="ectt-1000">prepare</span>, <span
+class="ectt-1000">configure</span>, <span
+class="ectt-1000">compile </span>or <span
+class="ectt-1000">install</span>, if
+ supported by the EAPI in question and occurring prior to the phase about to be
+ executed, are in <span
+class="ectt-1000">DEFINED_PHASES</span>.</li></ul>
+<div class="table">
+
+
+<!--l. 47--><p class="noindent" ><a
+ id="x1-86001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;9.1: </span><span
+class="content">EAPIs with <span
+class="ectt-1000">S </span>to <span
+class="ectt-1000">WORKDIR </span>fallbacks</span></div><!--tex4ht:label?: x1-86001r1 -->
+<div class="tabular">
+ <table id="TBL-22" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-22-1g"><col
+id="TBL-22-1" /><col
+id="TBL-22-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-22-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-22-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-22-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Fallback to </span><span
+class="ectt-1000">WORKDIR </span><span
+class="ecbx-1000">permitted?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-22-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-22-2-2"
+class="td11"> Always </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-22-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-3-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-22-3-2"
+class="td11"> Conditional error </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-22-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">9.1.2 </span> <a
+ id="x1-870009.1.2"></a>pkg_pretend</h4>
+<!--l. 62--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">pkg-pretend</span></span></span> The <span
+class="ectt-1000">pkg_pretend </span>function is only called for EAPIs listed in table&#x00A0;<a
+href="#x1-87001r2">9.2<!--tex4ht:ref: tab:pkg-pretend-table --></a> as supporting
+it.
+</p><!--l. 65--><p class="noindent" >The <span
+class="ectt-1000">pkg_pretend </span>function may be used to carry out sanity checks early on in the install process.
+For example, if an ebuild requires a particular kernel configuration, it may perform that check in
+<span
+class="ectt-1000">pkg_pretend </span>and call <span
+class="ectt-1000">eerror </span>and then <span
+class="ectt-1000">die </span>with appropriate messages if the requirement is not
+met.
+</p><!--l. 70--><p class="noindent" ><span
+class="ectt-1000">pkg_pretend </span>is run separately from the main phase function sequence, and does not participate in
+any kind of environment saving. There is no guarantee that any of an ebuild&#8217;s dependencies will be
+met at this stage, and no guarantee that the system state will not have changed substantially
+before the next phase is executed.
+</p><!--l. 75--><p class="noindent" ><span
+class="ectt-1000">pkg_pretend </span>must not write to the filesystem.
+</p>
+<div class="table">
+
+
+<!--l. 78--><p class="noindent" ><a
+ id="x1-87001r2"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;9.2: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">pkg_pretend</span></span></div><!--tex4ht:label?: x1-87001r2 -->
+<div class="tabular">
+ <table id="TBL-23" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-23-1g"><col
+id="TBL-23-1" /><col
+id="TBL-23-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-23-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-23-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-23-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">pkg_pretend</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-23-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-23-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-23-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-23-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-23-3-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-23-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-23-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-23-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">9.1.3 </span> <a
+ id="x1-880009.1.3"></a>pkg_setup</h4>
+<!--l. 93--><p class="noindent" >The <span
+class="ectt-1000">pkg_setup </span>function sets up the ebuild&#8217;s environment for all following functions,
+before the build process starts. Further, it checks whether any necessary prerequisites not
+covered by the package manager, e. g.&#x00A0;that certain kernel configuration options are
+fulfilled.
+</p><!--l. 97--><p class="noindent" ><span
+class="ectt-1000">pkg_setup </span>must be run with full filesystem permissions, including the ability to add new users
+and/or groups to the system.
+</p><!--l. 100--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">9.1.4 </span> <a
+ id="x1-890009.1.4"></a>src_unpack</h4>
+<!--l. 102--><p class="noindent" >The <span
+class="ectt-1000">src_unpack </span>function extracts all of the package&#8217;s sources. In EAPIs lacking <span
+class="ectt-1000">src_prepare</span>, it
+may also apply patches and set up the package&#8217;s build system for further use.
+</p><!--l. 105--><p class="noindent" >The initial working directory must be <span
+class="ectt-1000">WORKDIR</span>, and the default implementation used when the
+ebuild lacks the <span
+class="ectt-1000">src_unpack </span>function shall behave as:
+
+
+</p><!--l. 108--><p class="noindent" ><a
+ id="x1-89001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing 9.1: </span><span
+class="content"><span
+class="ectt-1000">src_unpack</span></span></div><!--tex4ht:label?: x1-89001r1 -->
+
+
+<div class="verbatim" id="verbatim-7">
+src_unpack()&#x00A0;{
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-n&#x00A0;${A}&#x00A0;]];&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;unpack&#x00A0;${A}
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />}</div>
+<!--l. 116--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<h4 class="subsectionHead"><span class="titlemark">9.1.5 </span> <a
+ id="x1-900009.1.5"></a>src_prepare</h4>
+<!--l. 121--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-prepare</span></span></span> The <span
+class="ectt-1000">src_prepare </span>function is only called for EAPIs listed in table&#x00A0;<a
+href="#x1-90002r3">9.3<!--tex4ht:ref: tab:src-prepare-table --></a> as supporting
+it. The <span
+class="ectt-1000">src_prepare </span>function can be used for post-unpack source preparation.
+</p><!--l. 125--><p class="noindent" >The initial working directory is <span
+class="ectt-1000">S</span>, with an error or fallback to <span
+class="ectt-1000">WORKDIR </span>as discussed in
+section&#x00A0;<a
+href="#x1-860009.1.1">9.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
+</p><!--l. 128--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-prepare-6</span></span></span> For EAPIs listed in table&#x00A0;<a
+href="#x1-90002r3">9.3<!--tex4ht:ref: tab:src-prepare-table --></a> as using format 6, the default implementation used
+when the ebuild lacks the <span
+class="ectt-1000">src_prepare </span>function shall behave as:
+
+
+</p><!--l. 132--><p class="noindent" ><a
+ id="x1-90001r2"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing 9.2: </span><span
+class="content"><span
+class="ectt-1000">src_prepare</span>, format&#x00A0;6</span></div><!--tex4ht:label?: x1-90001r2 -->
+
+
+<div class="verbatim" id="verbatim-8">
+src_prepare()&#x00A0;{
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;declare&#x00A0;-p&#x00A0;PATCHES&#x00A0;|&#x00A0;grep&#x00A0;-q&#x00A0;"^declare&#x00A0;-a&#x00A0;";&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;[[&#x00A0;-n&#x00A0;${PATCHES[@]}&#x00A0;]]&#x00A0;&amp;&amp;&#x00A0;eapply&#x00A0;"${PATCHES[@]}"
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;else
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;[[&#x00A0;-n&#x00A0;${PATCHES}&#x00A0;]]&#x00A0;&amp;&amp;&#x00A0;eapply&#x00A0;${PATCHES}
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;eapply_user
+&#x00A0;<br />}</div>
+<!--l. 143--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<!--l. 146--><p class="noindent" >For other EAPIs supporting <span
+class="ectt-1000">src_prepare</span>, the default implementation used when the ebuild lacks
+the <span
+class="ectt-1000">src_prepare </span>function is a no-op.
+</p>
+<div class="table">
+
+
+<!--l. 150--><p class="noindent" ><a
+ id="x1-90002r3"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;9.3: </span><span
+class="content"><span
+class="ectt-1000">src_prepare </span>support and behaviour for EAPIs</span></div><!--tex4ht:label?: x1-90002r3 -->
+<div class="tabular">
+ <table id="TBL-24" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-24-1g"><col
+id="TBL-24-1" /><col
+id="TBL-24-2" /><col
+id="TBL-24-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-24-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-24-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-24-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">src_prepare</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-24-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Format</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-24-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-24-2-1"
+class="td11"> 0, 1 </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-2-3"
+class="td11"> Not applicable </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-24-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-24-3-1"
+class="td11"> 2, 3, 4, 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-3-3"
+class="td11"> no-op </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-24-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-24-4-1"
+class="td11"> 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-24-4-3"
+class="td11"> 6 </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-24-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-24-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">9.1.6 </span> <a
+ id="x1-910009.1.6"></a>src_configure</h4>
+<!--l. 167--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-configure</span></span></span> The <span
+class="ectt-1000">src_configure </span>function is only called for EAPIs listed in table&#x00A0;<a
+href="#x1-91002r4">9.4<!--tex4ht:ref: tab:src-configure-table --></a> as
+supporting it.
+</p><!--l. 170--><p class="noindent" >The initial working directory is <span
+class="ectt-1000">S</span>, with an error or fallback to <span
+class="ectt-1000">WORKDIR </span>as discussed in
+section&#x00A0;<a
+href="#x1-860009.1.1">9.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
+</p><!--l. 173--><p class="noindent" >The <span
+class="ectt-1000">src_configure </span>function configures the package&#8217;s build environment. The default
+implementation used when the ebuild lacks the <span
+class="ectt-1000">src_configure </span>function shall behave
+as:
+
+
+</p><!--l. 176--><p class="noindent" ><a
+ id="x1-91001r3"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing 9.3: </span><span
+class="content"><span
+class="ectt-1000">src_configure</span></span></div><!--tex4ht:label?: x1-91001r3 -->
+
+
+<div class="verbatim" id="verbatim-9">
+src_configure()&#x00A0;{
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-x&#x00A0;${ECONF_SOURCE:-.}/configure&#x00A0;]];&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;econf
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />}</div>
+<!--l. 184--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<div class="table">
+
+
+<!--l. 188--><p class="noindent" ><a
+ id="x1-91002r4"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;9.4: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">src_configure</span></span></div><!--tex4ht:label?: x1-91002r4 -->
+<div class="tabular">
+ <table id="TBL-25" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-25-1g"><col
+id="TBL-25-1" /><col
+id="TBL-25-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-25-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-25-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-25-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">src_configure</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-25-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-25-2-1"
+class="td11"> 0, 1 </td><td style="white-space:nowrap; text-align:left;" id="TBL-25-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-25-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-25-3-1"
+class="td11"> 2, 3, 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-25-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-25-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-25-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">9.1.7 </span> <a
+ id="x1-920009.1.7"></a>src_compile</h4>
+<!--l. 203--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-compile</span></span></span> The <span
+class="ectt-1000">src_compile </span>function configures the package&#8217;s build environment in EAPIs
+lacking <span
+class="ectt-1000">src_configure</span>, and builds the package in all EAPIs.
+</p><!--l. 206--><p class="noindent" >The initial working directory is <span
+class="ectt-1000">S</span>, with an error or fallback to <span
+class="ectt-1000">WORKDIR </span>as discussed in
+section&#x00A0;<a
+href="#x1-860009.1.1">9.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
+</p><!--l. 209--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-compile-0</span></span></span> For EAPIs listed in table&#x00A0;<a
+href="#x1-92004r5">9.5<!--tex4ht:ref: tab:src-compile-table --></a> as using format 0, the default implementation used
+when the ebuild lacks the <span
+class="ectt-1000">src_compile </span>function shall behave as:
+
+
+</p><!--l. 213--><p class="noindent" ><a
+ id="x1-92001r4"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing 9.4: </span><span
+class="content"><span
+class="ectt-1000">src_compile</span>, format&#x00A0;0</span></div><!--tex4ht:label?: x1-92001r4 -->
+
+
+<div class="verbatim" id="verbatim-10">
+src_compile()&#x00A0;{
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-x&#x00A0;./configure&#x00A0;]];&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;econf
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-f&#x00A0;Makefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;GNUmakefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;makefile&#x00A0;]];&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;||&#x00A0;die&#x00A0;"emake&#x00A0;failed"
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />}</div>
+<!--l. 224--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<!--l. 227--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-compile-1</span></span></span> For EAPIs listed in table&#x00A0;<a
+href="#x1-92004r5">9.5<!--tex4ht:ref: tab:src-compile-table --></a> as using format 1, the default implementation used
+when the ebuild lacks the <span
+class="ectt-1000">src_compile </span>function shall behave as:
+
+
+</p><!--l. 231--><p class="noindent" ><a
+ id="x1-92002r5"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing 9.5: </span><span
+class="content"><span
+class="ectt-1000">src_compile</span>, format&#x00A0;1</span></div><!--tex4ht:label?: x1-92002r5 -->
+
+
+<div class="verbatim" id="verbatim-11">
+src_compile()&#x00A0;{
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-x&#x00A0;${ECONF_SOURCE:-.}/configure&#x00A0;]];&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;econf
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-f&#x00A0;Makefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;GNUmakefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;makefile&#x00A0;]];&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;||&#x00A0;die&#x00A0;"emake&#x00A0;failed"
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />}</div>
+<!--l. 242--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<!--l. 245--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-compile-2</span></span></span> For EAPIs listed in table&#x00A0;<a
+href="#x1-92004r5">9.5<!--tex4ht:ref: tab:src-compile-table --></a> as using format 2, the default implementation used
+when the ebuild lacks the <span
+class="ectt-1000">src_compile </span>function shall behave as:
+
+
+</p><!--l. 249--><p class="noindent" ><a
+ id="x1-92003r6"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing 9.6: </span><span
+class="content"><span
+class="ectt-1000">src_compile</span>, format&#x00A0;2</span></div><!--tex4ht:label?: x1-92003r6 -->
+
+
+<div class="verbatim" id="verbatim-12">
+src_compile()&#x00A0;{
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-f&#x00A0;Makefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;GNUmakefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;makefile&#x00A0;]];&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;||&#x00A0;die&#x00A0;"emake&#x00A0;failed"
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />}</div>
+<!--l. 257--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<div class="table">
+
+
+<!--l. 261--><p class="noindent" ><a
+ id="x1-92004r5"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;9.5: </span><span
+class="content"><span
+class="ectt-1000">src_compile </span>behaviour for EAPIs</span></div><!--tex4ht:label?: x1-92004r5 -->
+<div class="tabular">
+ <table id="TBL-26" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-26-1g"><col
+id="TBL-26-1" /><col
+id="TBL-26-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-26-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-26-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-26-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Format</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-26-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-26-2-1"
+class="td11"> 0 </td><td style="white-space:nowrap; text-align:left;" id="TBL-26-2-2"
+class="td11"> 0 </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-26-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-26-3-1"
+class="td11"> 1 </td><td style="white-space:nowrap; text-align:left;" id="TBL-26-3-2"
+class="td11"> 1 </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-26-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-26-4-1"
+class="td11"> 2, 3, 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-26-4-2"
+class="td11"> 2 </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-26-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-26-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">9.1.8 </span> <a
+ id="x1-930009.1.8"></a>src_test</h4>
+<!--l. 277--><p class="noindent" >The <span
+class="ectt-1000">src_test </span>function runs unit tests for the newly built but not yet installed package as
+provided.
+</p><!--l. 280--><p class="noindent" >The initial working directory must be <span
+class="ectt-1000">S </span>if that exists, falling back to <span
+class="ectt-1000">WORKDIR </span>otherwise. The
+default implementation used when the ebuild lacks the <span
+class="ectt-1000">src_test </span>function must, if tests are
+enabled, run <span
+class="ectt-1000">emake check </span>if and only if such a target is available, or if not run <span
+class="ectt-1000">emake test </span>if and
+only if such a target is available. In both cases, if <span
+class="ectt-1000">emake </span>returns non-zero the build must be
+aborted.
+</p><!--l. 286--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">parallel-tests</span></span></span> For EAPIs listed in table&#x00A0;<a
+href="#x1-93001r6">9.6<!--tex4ht:ref: tab:src-test-table --></a> as not supporting parallel tests, the <span
+class="ectt-1000">emake</span>
+command must be called with option <span
+class="ectt-1000">-j1</span>.
+</p><!--l. 289--><p class="noindent" >The <span
+class="ectt-1000">src_test </span>function may be disabled by <span
+class="ectt-1000">RESTRICT</span>. See section&#x00A0;<a
+href="#x1-810008.2.8">8.2.8<!--tex4ht:ref: sec:restrict --></a>. It may be disabled by
+user too, using a PM-specific mechanism.
+</p>
+<div class="table">
+
+
+<!--l. 293--><p class="noindent" ><a
+ id="x1-93001r6"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;9.6: </span><span
+class="content"><span
+class="ectt-1000">src_test </span>behaviour for EAPIs</span></div><!--tex4ht:label?: x1-93001r6 -->
+<div class="tabular">
+ <table id="TBL-27" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-27-1g"><col
+id="TBL-27-1" /><col
+id="TBL-27-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-27-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-27-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-27-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports parallel tests?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-27-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-27-2-1"
+class="td11"> 0, 1, 2, 3, 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-27-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-27-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-27-3-1"
+class="td11"> 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-27-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-27-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-27-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">9.1.9 </span> <a
+ id="x1-940009.1.9"></a>src_install</h4>
+<!--l. 308--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-install</span></span></span> The <span
+class="ectt-1000">src_install </span>function installs the package&#8217;s content to a directory specified in
+<span
+class="ectt-1000">D</span>.
+</p><!--l. 311--><p class="noindent" >The initial working directory is <span
+class="ectt-1000">S</span>, with an error or fallback to <span
+class="ectt-1000">WORKDIR </span>as discussed in
+section&#x00A0;<a
+href="#x1-860009.1.1">9.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
+</p><!--l. 314--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-install-4</span></span></span> For EAPIs listed in table&#x00A0;<a
+href="#x1-94003r7">9.7<!--tex4ht:ref: tab:src-install-table --></a> as using format 4, the default implementation used
+when the ebuild lacks the <span
+class="ectt-1000">src_install </span>function shall behave as:
+
+
+</p><!--l. 318--><p class="noindent" ><a
+ id="x1-94001r7"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing 9.7: </span><span
+class="content"><span
+class="ectt-1000">src_install</span>, format&#x00A0;4</span></div><!--tex4ht:label?: x1-94001r7 -->
+
+
+<div class="verbatim" id="verbatim-13">
+src_install()&#x00A0;{
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-f&#x00A0;Makefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;GNUmakefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;makefile&#x00A0;]];&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;DESTDIR="${D}"&#x00A0;install
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;!&#x00A0;declare&#x00A0;-p&#x00A0;DOCS&#x00A0;&#x003E;/dev/null&#x00A0;2&#x003E;&amp;1&#x00A0;;&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;local&#x00A0;d
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;for&#x00A0;d&#x00A0;in&#x00A0;README*&#x00A0;ChangeLog&#x00A0;AUTHORS&#x00A0;NEWS&#x00A0;TODO&#x00A0;CHANGES&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;THANKS&#x00A0;BUGS&#x00A0;FAQ&#x00A0;CREDITS&#x00A0;CHANGELOG&#x00A0;;&#x00A0;do
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;[[&#x00A0;-s&#x00A0;"${d}"&#x00A0;]]&#x00A0;&amp;&amp;&#x00A0;dodoc&#x00A0;"${d}"
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;done
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;elif&#x00A0;declare&#x00A0;-p&#x00A0;DOCS&#x00A0;|&#x00A0;grep&#x00A0;-q&#x00A0;"^declare&#x00A0;-a&#x00A0;"&#x00A0;;&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;dodoc&#x00A0;"${DOCS[@]}"
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;else
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;dodoc&#x00A0;${DOCS}
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />}</div>
+<!--l. 338--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<!--l. 341--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">src-install-6</span></span></span> For EAPIs listed in table&#x00A0;<a
+href="#x1-94003r7">9.7<!--tex4ht:ref: tab:src-install-table --></a> as using format 6, the default implementation used
+when the ebuild lacks the <span
+class="ectt-1000">src_install </span>function shall behave as:
+
+
+</p><!--l. 345--><p class="noindent" ><a
+ id="x1-94002r8"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing 9.8: </span><span
+class="content"><span
+class="ectt-1000">src_install</span>, format&#x00A0;6</span></div><!--tex4ht:label?: x1-94002r8 -->
+
+
+<div class="verbatim" id="verbatim-14">
+src_install()&#x00A0;{
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-f&#x00A0;Makefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;GNUmakefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;makefile&#x00A0;]];&#x00A0;then
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;DESTDIR="${D}"&#x00A0;install
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;einstalldocs
+&#x00A0;<br />}</div>
+<!--l. 354--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<!--l. 357--><p class="noindent" >For other EAPIs, the default implementation used when the ebuild lacks the <span
+class="ectt-1000">src_install </span>function
+is a no-op.
+</p>
+<div class="table">
+
+
+<!--l. 361--><p class="noindent" ><a
+ id="x1-94003r7"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;9.7: </span><span
+class="content"><span
+class="ectt-1000">src_install </span>behaviour for EAPIs</span></div><!--tex4ht:label?: x1-94003r7 -->
+<div class="tabular">
+ <table id="TBL-28" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-28-1g"><col
+id="TBL-28-1" /><col
+id="TBL-28-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-28-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-28-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-28-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Format</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-28-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-28-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-28-2-2"
+class="td11"> no-op </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-28-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-28-3-1"
+class="td11"> 4, 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-28-3-2"
+class="td11"> 4 </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-28-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-28-4-1"
+class="td11"> 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-28-4-2"
+class="td11"> 6 </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-28-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-28-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">9.1.10 </span> <a
+ id="x1-950009.1.10"></a>pkg_preinst</h4>
+<!--l. 377--><p class="noindent" >The <span
+class="ectt-1000">pkg_preinst </span>function performs any special tasks that are required immediately before
+merging the package to the live filesystem. It must not write outside of the directories specified by
+the <span
+class="ectt-1000">ROOT </span>and <span
+class="ectt-1000">D </span>environment variables.
+</p><!--l. 381--><p class="noindent" ><span
+class="ectt-1000">pkg_preinst </span>must be run with full access to all files and directories below that specified by the
+<span
+class="ectt-1000">ROOT </span>and <span
+class="ectt-1000">D </span>environment variables.
+</p><!--l. 384--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">9.1.11 </span> <a
+ id="x1-960009.1.11"></a>pkg_postinst</h4>
+<!--l. 386--><p class="noindent" >The <span
+class="ectt-1000">pkg_postinst </span>function performs any special tasks that are required immediately after
+merging the package to the live filesystem. It must not write outside of the directory specified in
+the <span
+class="ectt-1000">ROOT </span>environment variable.
+</p><!--l. 390--><p class="noindent" ><span
+class="ectt-1000">pkg_postinst</span>, like, <span
+class="ectt-1000">pkg_preinst</span>, must be run with full access to all files and directories below
+that specified by the <span
+class="ectt-1000">ROOT </span>environment variable.
+</p><!--l. 393--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">9.1.12 </span> <a
+ id="x1-970009.1.12"></a>pkg_prerm</h4>
+<!--l. 395--><p class="noindent" >The <span
+class="ectt-1000">pkg_prerm </span>function performs any special tasks that are required immediately before
+unmerging the package from the live filesystem. It must not write outside of the directory specified
+by the <span
+class="ectt-1000">ROOT </span>environment variable.
+</p><!--l. 399--><p class="noindent" ><span
+class="ectt-1000">pkg_prerm </span>must be run with full access to all files and directories below that specified by the <span
+class="ectt-1000">ROOT</span>
+environment variable.
+</p><!--l. 402--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">9.1.13 </span> <a
+ id="x1-980009.1.13"></a>pkg_postrm</h4>
+<!--l. 404--><p class="noindent" >The <span
+class="ectt-1000">pkg_postrm </span>function performs any special tasks that are required immediately after
+unmerging the package from the live filesystem. It must not write outside of the directory specified
+by the <span
+class="ectt-1000">ROOT </span>environment variable.
+</p><!--l. 408--><p class="noindent" ><span
+class="ectt-1000">pkg_postrm </span>must be run with full access to all files and directories below that specified by the
+<span
+class="ectt-1000">ROOT </span>environment variable.
+
+
+</p><!--l. 411--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">9.1.14 </span> <a
+ id="x1-990009.1.14"></a>pkg_config</h4>
+<!--l. 413--><p class="noindent" >The <span
+class="ectt-1000">pkg_config </span>function performs any custom steps required to configure a package after it has
+been fully installed. It is the only ebuild function which may be interactive and prompt for user
+input.
+</p><!--l. 416--><p class="noindent" ><span
+class="ectt-1000">pkg_config </span>must be run with full access to all files and directories inside of <span
+class="ectt-1000">ROOT</span>.
+</p><!--l. 418--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">9.1.15 </span> <a
+ id="x1-1000009.1.15"></a>pkg_info</h4>
+<!--l. 420--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">pkg-info</span></span></span> The <span
+class="ectt-1000">pkg_info </span>function may be called by the package manager when displaying
+information about an installed package. In EAPIs listed in table&#x00A0;<a
+href="#x1-100001r8">9.8<!--tex4ht:ref: tab:pkg-info-table --></a> as supporting <span
+class="ectt-1000">pkg_info </span>on
+non-installed packages, it may also be called by the package manager when displaying information
+about a non-installed package. In this case, ebuild authors should note that dependencies may not
+be installed.
+</p><!--l. 426--><p class="noindent" ><span
+class="ectt-1000">pkg_info </span>must not write to the filesystem.
+</p>
+<div class="table">
+
+
+<!--l. 429--><p class="noindent" ><a
+ id="x1-100001r8"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;9.8: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">pkg_info </span>on non-installed packages</span></div><!--tex4ht:label?: x1-100001r8 -->
+<div class="tabular">
+ <table id="TBL-29" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-29-1g"><col
+id="TBL-29-1" /><col
+id="TBL-29-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-29-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-29-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-29-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">pkg_info </span><span
+class="ecbx-1000">on non-installed packages?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-29-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-29-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-29-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-29-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-29-3-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-29-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-29-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-29-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">9.1.16 </span> <a
+ id="x1-1010009.1.16"></a>pkg_nofetch</h4>
+<!--l. 444--><p class="noindent" >The <span
+class="ectt-1000">pkg_nofetch </span>function is run when the fetch phase of an fetch-restricted ebuild is run,
+and the relevant source files are not available. It should direct the user to download all
+relevant source files from their respective locations, with notes concerning licensing if
+applicable.
+</p><!--l. 448--><p class="noindent" ><span
+class="ectt-1000">pkg_nofetch </span>must require no write access to any part of the filesystem.
+</p><!--l. 450--><p class="noindent" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">9.1.17 </span> <a
+ id="x1-1020009.1.17"></a>Default phase functions</h4>
+<!--l. 453--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">default-phase-funcs</span></span></span> In EAPIs listed in table&#x00A0;<a
+href="#x1-102001r9">9.9<!--tex4ht:ref: tab:default-phase-function-table --></a> as supporting <span
+class="ectt-1000">default_ </span>phase functions, a
+function named <span
+class="ectt-1000">default_</span>(phase) that behaves as the default implementation for that EAPI shall
+be defined when executing any ebuild phase listed in the table. Ebuilds must not call these
+functions except when in the phase in question.
+</p>
+<div class="table">
+
+
+<!--l. 460--><p class="noindent" ><a
+ id="x1-102001r9"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;9.9: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">default_ </span>phase functions</span></div><!--tex4ht:label?: x1-102001r9 -->
+<div class="tabular">
+ <table id="TBL-30" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-30-1g"><col
+id="TBL-30-1" /><col
+id="TBL-30-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-30-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-30-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-30-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">default_ </span><span
+class="ecbx-1000">functions in phases</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-30-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-30-2-1"
+class="td11"> 0, 1 </td><td style="white-space:wrap; text-align:left;" id="TBL-30-2-2"
+class="td11"> <!--l. 467--><p class="noindent" >None </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-30-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-30-3-1"
+class="td11"> 2, 3 </td><td style="white-space:wrap; text-align:left;" id="TBL-30-3-2"
+class="td11"> <!--l. 468--><p class="noindent" ><span
+class="ectt-1000">pkg_nofetch</span>,
+ <span
+class="ectt-1000">src_unpack</span>,
+ <span
+class="ectt-1000">src_prepare</span>,
+ <span
+class="ectt-1000">src_configure</span>,
+ <span
+class="ectt-1000">src_compile</span>,
+ <span
+class="ectt-1000">src_test</span> </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-30-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-30-4-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:wrap; text-align:left;" id="TBL-30-4-2"
+class="td11"> <!--l. 470--><p class="noindent" ><span
+class="ectt-1000">pkg_nofetch</span>,
+ <span
+class="ectt-1000">src_unpack</span>,
+ <span
+class="ectt-1000">src_prepare</span>,
+ <span
+class="ectt-1000">src_configure</span>,
+ <span
+class="ectt-1000">src_compile</span>,
+ <span
+class="ectt-1000">src_install</span>,
+ <span
+class="ectt-1000">src_test</span> </p></td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-30-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-30-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h3 class="sectionHead"><span class="titlemark">9.2 </span> <a
+ id="x1-1030009.2"></a>Call Order</h3>
+<!--l. 478--><p class="noindent" >The call order for installing a package is:
+</p><!--l. 481--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_pretend </span>(only for EAPIs listed in table&#x00A0;<a
+href="#x1-87001r2">9.2<!--tex4ht:ref: tab:pkg-pretend-table --></a>), which is called outside of the normal
+ call order process.
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_setup</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_unpack</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_prepare </span>(only for EAPIs listed in table&#x00A0;<a
+href="#x1-90002r3">9.3<!--tex4ht:ref: tab:src-prepare-table --></a>)
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_configure </span>(only for EAPIs listed in table&#x00A0;<a
+href="#x1-91002r4">9.4<!--tex4ht:ref: tab:src-configure-table --></a>)
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_compile</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_test </span>(except if <span
+class="ectt-1000">RESTRICT=test </span>or disabled by user)
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_install</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_preinst</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_postinst</span></li></ul>
+<!--l. 494--><p class="noindent" >The call order for uninstalling a package is:
+</p><!--l. 497--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_prerm</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_postrm</span></li></ul>
+<!--l. 501--><p class="noindent" >The call order for upgrading, downgrading or reinstalling a package is:
+</p><!--l. 504--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_pretend </span>(only for EAPIs listed in table&#x00A0;<a
+href="#x1-87001r2">9.2<!--tex4ht:ref: tab:pkg-pretend-table --></a>), which is called outside of the normal
+ call order process.
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_setup</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_unpack</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_prepare </span>(only for EAPIs listed in table&#x00A0;<a
+href="#x1-90002r3">9.3<!--tex4ht:ref: tab:src-prepare-table --></a>)
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_configure </span>(only for EAPIs listed in table&#x00A0;<a
+href="#x1-91002r4">9.4<!--tex4ht:ref: tab:src-configure-table --></a>)
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_compile</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_test </span>(except if <span
+class="ectt-1000">RESTRICT=test</span>)
+
+
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">src_install</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_preinst</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_prerm </span>for the package being replaced
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_postrm </span>for the package being replaced
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">pkg_postinst</span></li></ul>
+<!--l. 521--><p class="noindent" >
+</p><dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>When up- or downgrading a package in EAPI 0 or 1, the last four phase functions can
+alternatively be called in the order <span
+class="ectt-1000">pkg_preinst</span>, <span
+class="ectt-1000">pkg_postinst</span>, <span
+class="ectt-1000">pkg_prerm</span>, <span
+class="ectt-1000">pkg_postrm</span>.
+This behaviour is deprecated.</dd></dl>
+<!--l. 523--><p class="noindent" >The <span
+class="ectt-1000">pkg_config</span>, <span
+class="ectt-1000">pkg_info </span>and <span
+class="ectt-1000">pkg_nofetch </span>functions are not called in a normal sequence. The
+<span
+class="ectt-1000">pkg_pretend </span>function is called some unspecified time before a (possibly hypothetical) normal
+sequence.
+</p><!--l. 527--><p class="noindent" >For installing binary packages, the <span
+class="ectt-1000">src </span>phases are not called.
+</p><!--l. 529--><p class="noindent" >When building binary packages that are not to be installed locally, the <span
+class="ectt-1000">pkg_preinst </span>and
+<span
+class="ectt-1000">pkg_postinst </span>functions are not called.
+
+
+
+
+
+
+</p>
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;10</span><br /><a
+ id="x1-10400010"></a>Eclasses</h2>
+<!--l. 4--><p class="noindent" >Eclasses serve to store common code that is used by more than one ebuild, which greatly aids
+maintainability and reduces the tree size. However, due to metadata cache issues, care must be
+taken in their use. In format they are similar to an ebuild, and indeed are sourced as part of any
+ebuild using them. The interpreter is therefore the same, and the same requirements for being
+parseable hold.
+</p><!--l. 10--><p class="noindent" >Eclasses must be located in the <span
+class="ectt-1000">eclass </span>directory in the top level of the repository&#8212;see section&#x00A0;<a
+href="#x1-380004.6">4.6<!--tex4ht:ref: sec:eclass-dir --></a>.
+Each eclass is a single file named <span
+class="ectt-1000">&#x003C;name&#x003E;.eclass</span>, where <span
+class="ectt-1000">&#x003C;name&#x003E; </span>is the name of this eclass, used by
+<span
+class="ectt-1000">inherit </span>and <span
+class="ectt-1000">EXPORT_FUNCTIONS </span>among other places.
+</p>
+<h3 class="sectionHead"><span class="titlemark">10.1 </span> <a
+ id="x1-10500010.1"></a>The inherit Command</h3>
+<!--l. 17--><p class="noindent" >An ebuild wishing to make use of an eclass does so by using the <span
+class="ectt-1000">inherit </span>command in global scope.
+This will cause the eclass to be sourced as part of the ebuild&#8212;any function or variable definitions
+in the eclass will appear as part of the ebuild, with exceptions for certain metadata variables, as
+described below.
+</p><!--l. 22--><p class="noindent" >The <span
+class="ectt-1000">inherit </span>command takes one or more parameters, which must be the names of eclasses
+(excluding the <span
+class="ectt-1000">.eclass </span>suffix and the path). For each parameter, in order, the named eclass is
+sourced.
+</p><!--l. 25--><p class="noindent" >Eclasses may end up being sourced multiple times.
+</p><!--l. 27--><p class="noindent" >The <span
+class="ectt-1000">inherit </span>command must also ensure that:
+</p><!--l. 30--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">The <span
+class="ectt-1000">ECLASS </span>variable is set to the name of the current eclass, when sourcing that eclass.
+ </li>
+ <li class="compactitem">Once all inheriting has been done, the <span
+class="ectt-1000">INHERITED </span>metadata variable contains the name
+ of every eclass used, separated by whitespace.</li></ul>
+<!--l. 35--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">10.2 </span> <a
+ id="x1-10600010.2"></a>Eclass-defined Metadata Keys</h3>
+<!--l. 37--><p class="noindent" >The <span
+class="ectt-1000">IUSE</span>, <span
+class="ectt-1000">REQUIRED_USE</span>, <span
+class="ectt-1000">DEPEND</span>, <span
+class="ectt-1000">BDEPEND</span>, <span
+class="ectt-1000">RDEPEND </span>and <span
+class="ectt-1000">PDEPEND </span>variables are handled specially
+when set by an eclass. They must be accumulated across eclasses, appending the value set by each
+eclass to the resulting value after the previous one is loaded. Then the eclass-defined value is
+appended to that defined by the ebuild. In the case of <span
+class="ectt-1000">RDEPEND</span>, this is done after the implicit
+<span
+class="ectt-1000">RDEPEND </span>rules in section&#x00A0;<a
+href="#x1-650007.3.3">7.3.3<!--tex4ht:ref: sec:rdepend-depend --></a> are applied.
+</p><!--l. 43--><p class="noindent" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">10.3 </span> <a
+ id="x1-10700010.3"></a>EXPORT_FUNCTIONS</h3>
+<!--l. 45--><p class="noindent" >There is one command available in the eclass environment that is neither available nor meaningful
+in ebuilds&#8212;<span
+class="ectt-1000">EXPORT_FUNCTIONS</span>. This can be used to alias ebuild phase functions from the eclass so
+that an ebuild inherits a default definition whilst retaining the ability to override and call the
+eclass-defined version from it. The use of it is best illustrated by an example; this is given in
+
+
+listing&#x00A0;<a
+href="#x1-107001r1">10.1<!--tex4ht:ref: lst:export-functions --></a> and is a snippet from a hypothetical <span
+class="ectt-1000">foo.eclass</span>.
+
+
+</p><!--l. 52--><p class="noindent" ><a
+ id="x1-107001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing 10.1: </span><span
+class="content"><span
+class="ectt-1000">EXPORT_FUNCTIONS </span>example: <span
+class="ectt-1000">foo.eclass</span></span></div><!--tex4ht:label?: x1-107001r1 -->
+
+
+<div class="verbatim" id="verbatim-15">
+foo_src_compile()
+&#x00A0;<br />{
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;econf&#x00A0;--enable-gerbil&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;$(use_enable&#x00A0;fnord)
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;gerbil&#x00A0;||&#x00A0;die&#x00A0;"Couldn&#8217;t&#x00A0;make&#x00A0;a&#x00A0;gerbil"
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;||&#x00A0;die&#x00A0;"emake&#x00A0;failed"
+&#x00A0;<br />}
+&#x00A0;<br />
+&#x00A0;<br />EXPORT_FUNCTIONS&#x00A0;src_compile</div>
+<!--l. 63--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<!--l. 66--><p class="noindent" >This example defines an eclass <span
+class="ectt-1000">src_compile </span>function and uses <span
+class="ectt-1000">EXPORT_FUNCTIONS </span>to alias it.
+Then any ebuild that inherits <span
+class="ectt-1000">foo.eclass </span>will have a default <span
+class="ectt-1000">src_compile </span>defined, but
+should the author wish to override it he can access the function in <span
+class="ectt-1000">foo.eclass </span>by calling
+<span
+class="ectt-1000">foo_src_compile</span>.
+</p><!--l. 71--><p class="noindent" ><span
+class="ectt-1000">EXPORT_FUNCTIONS </span>must only be used on ebuild phase functions. The function that is aliased
+must be named <span
+class="ectt-1000">eclassname_phasefunctionname</span>, where <span
+class="ectt-1000">eclassname </span>is the name of the
+eclass.
+
+
+
+
+
+
+</p>
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;11</span><br /><a
+ id="x1-10800011"></a>The Ebuild Environment</h2>
+<h3 class="sectionHead"><span class="titlemark">11.1 </span> <a
+ id="x1-10900011.1"></a>Defined Variables</h3>
+<!--l. 4--><p class="noindent" >The package manager must define the following environment variables. Not all variables are
+meaningful in all phases; variables that are not meaningful in a given phase may be unset or set to
+any value. Ebuilds must not attempt to modify any of these variables, unless otherwise
+specified.
+</p><!--l. 8--><p class="noindent" >Because of their special meanings, these variables may not be preserved consistently across all
+phases as would normally happen due to environment saving (see&#x00A0;<a
+href="#x1-11400011.2">11.2<!--tex4ht:ref: sec:ebuild-env-state --></a>). For example,
+<span
+class="ectt-1000">EBUILD_PHASE </span>is different for every phase, and <span
+class="ectt-1000">ROOT </span>may have changed between the various
+different <span
+class="ectt-1000">pkg_* </span>phases. Ebuilds must recalculate any variable they derive from an inconsistent
+variable.
+
+
+ <a
+ id="x1-109001r1"></a>
+</p><!--l. 22--><div class="longtable"> <table id="TBL-31" class="longtable"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-31-1g"><col
+id="TBL-31-1" /><col
+id="TBL-31-2" /><col
+id="TBL-31-3" /><col
+id="TBL-31-4" /></colgroup>
+ <tr
+ style="vertical-align:baseline;" id="TBL-31-1-"><td colspan="4" style="white-space:nowrap; text-align:center;" id="TBL-31-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"> <div class="caption"
+><span class="id">Table&#x00A0;11.1: </span><span
+class="content">Defined variables</span></div><!--tex4ht:label?: x1-109001r1 --> </div> <a
+ id="x1-109002"></a>
+ </td></tr><tr
+ style="vertical-align:baseline;" id="TBL-31-2-"><td colspan="4" style="white-space:nowrap; text-align:left;" id="TBL-31-2-1"
+class="td11"><!--cmidrule-->
+ </td></tr><tr
+ style="vertical-align:baseline;" id="TBL-31-3-"><td style="white-space:nowrap; text-align:center;" id="TBL-31-3-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Variable</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-31-3-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Legal in</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-31-3-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Consistent?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-31-3-4"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Description</span></div>
+ </td></tr><tr
+ style="vertical-align:baseline;" id="TBL-31-4-"><td colspan="4" style="white-space:nowrap; text-align:left;" id="TBL-31-4-1"
+class="td11"><!--cmidrule-->
+ </td></tr><tr
+ style="vertical-align:baseline;" id="TBL-31-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-5-1"
+class="td11"> </td> </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-6-1"
+class="td11"></td><td style="white-space:wrap; text-align:left;" id="TBL-31-6-2"
+class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-31-6-3"
+class="td11"> </td><td style="white-space:wrap; text-align:left;" id="TBL-31-6-4"
+class="td11">
+</td></tr> <tr
+ style="vertical-align:baseline;" id="TBL-31-18-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-18-1"
+class="td11"> <span
+class="ectt-1000">P </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-18-2"
+class="td11">
+ <!--l. 42--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-18-3"
+class="td11"> No<span class="footnote-mark"><a
+href="#fn2x12" id="fn2x12-bk"><sup class="textsuperscript">2</sup></a></span><a
+ id="x1-109003f2"></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-31-18-4"
+class="td11">
+ <!--l. 44--><p class="noindent" >Package name and version, without the revision part. For example, <span
+class="ectt-1000">vim-7.0.174</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-19-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-19-1"
+class="td11"> <span
+class="ectt-1000">PF </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-19-2"
+class="td11">
+ <!--l. 46--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-19-3"
+class="td11"> Ditto </td><td style="white-space:wrap; text-align:left;" id="TBL-31-19-4"
+class="td11">
+ <!--l. 48--><p class="noindent" >Package name, version, and revision (if any), for example <span
+class="ectt-1000">vim-7.0.174-r1</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-20-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-20-1"
+class="td11"> <span
+class="ectt-1000">PN </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-20-2"
+class="td11">
+ <!--l. 50--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-20-3"
+class="td11"> Ditto </td><td style="white-space:wrap; text-align:left;" id="TBL-31-20-4"
+class="td11">
+ <!--l. 52--><p class="noindent" >Package name, for example <span
+class="ectt-1000">vim</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-21-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-21-1"
+class="td11"> <span
+class="ectt-1000">CATEGORY </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-21-2"
+class="td11">
+ <!--l. 54--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-21-3"
+class="td11"> Ditto </td><td style="white-space:wrap; text-align:left;" id="TBL-31-21-4"
+class="td11">
+ <!--l. 56--><p class="noindent" >The package&#8217;s category, for example <span
+class="ectt-1000">app-editors</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-22-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-22-1"
+class="td11"> <span
+class="ectt-1000">PV </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-22-2"
+class="td11">
+ <!--l. 58--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-22-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-22-4"
+class="td11">
+ <!--l. 60--><p class="noindent" >Package version, with no revision. For example <span
+class="ectt-1000">7.0.174</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-23-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-23-1"
+class="td11"> <span
+class="ectt-1000">PR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-23-2"
+class="td11">
+ <!--l. 62--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-23-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-23-4"
+class="td11">
+ <!--l. 64--><p class="noindent" >Package revision, or <span
+class="ectt-1000">r0 </span>if none exists. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-24-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-24-1"
+class="td11"> <span
+class="ectt-1000">PVR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-24-2"
+class="td11">
+ <!--l. 66--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-24-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-24-4"
+class="td11">
+ <!--l. 68--><p class="noindent" >Package version and revision (if any), for example <span
+class="ectt-1000">7.0.174 </span>or <span
+class="ectt-1000">7.0.174-r1</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-25-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-25-1"
+class="td11"> <span
+class="ectt-1000">A </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-25-2"
+class="td11">
+ <!--l. 70--><p class="noindent" ><span
+class="ectt-1000">src_*</span>,
+ <span
+class="ectt-1000">pkg_nofetch</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-25-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-25-4"
+class="td11">
+ <!--l. 72--><p class="noindent" >All source files available for the package, whitespace separated with no leading or
+ trailing whitespace, and in the order in which the item first appears in a matched
+ component of <span
+class="ectt-1000">SRC_URI</span>. Does not include any that are disabled because of USE
+ conditionals. The value is calculated from the base names of each element of the
+ <span
+class="ectt-1000">SRC_URI </span>ebuild metadata variable. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-26-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-26-1"
+class="td11"> <span
+class="ectt-1000">AA</span><span class="footnote-mark"><a
+href="#fn3x12" id="fn3x12-bk"><sup class="textsuperscript">3</sup></a></span><a
+ id="x1-109004f3"></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-31-26-2"
+class="td11">
+ <!--l. 80--><p class="noindent" >Ditto </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-26-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-26-4"
+class="td11">
+ <!--l. 82--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">aa</span></span></span> All source files that could be available for the package, including any that are
+ disabled in <span
+class="ectt-1000">A </span>because of USE conditionals. The value is calculated from the base
+ names of each element of the <span
+class="ectt-1000">SRC_URI </span>ebuild metadata variable. Only for EAPIs
+ listed in table&#x00A0;<a
+href="#x1-109008r3">11.3<!--tex4ht:ref: tab:removed-env-vars-table --></a> as supporting <span
+class="ectt-1000">AA</span>. </p></td>
+
+
+
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-27-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-27-1"
+class="td11"> <span
+class="ectt-1000">FILESDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-27-2"
+class="td11">
+ <!--l. 87--><p class="noindent" ><span
+class="ectt-1000">src_*</span>,
+ global&#x00A0;scope<span class="footnote-mark"><a
+href="#fn4x12" id="fn4x12-bk"><sup class="textsuperscript">4</sup></a></span> <a
+ id="x1-109005f4"></a> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-27-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-27-4"
+class="td11">
+ <!--l. 90--><p class="noindent" >The full path to a directory where the files from the package&#8217;s files directory
+ (used for small support files or patches) are available. See section&#x00A0;<a
+href="#x1-310004.3">4.3<!--tex4ht:ref: sec:package-dirs --></a>. May or
+ may not exist; if a repository provides no support files for the package in question
+ then an ebuild must be prepared for the situation where <span
+class="ectt-1000">FILESDIR </span>points to a
+ non-existent directory. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-28-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-28-1"
+class="td11"> <span
+class="ectt-1000">DISTDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-28-2"
+class="td11">
+ <!--l. 95--><p class="noindent" >Ditto </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-28-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-28-4"
+class="td11">
+ <!--l. 97--><p class="noindent" >The full path to the directory in which the files in the <span
+class="ectt-1000">A </span>variable are stored. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-29-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-29-1"
+class="td11"> <span
+class="ectt-1000">WORKDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-29-2"
+class="td11">
+ <!--l. 99--><p class="noindent" >Ditto </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-29-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-29-4"
+class="td11">
+ <!--l. 101--><p class="noindent" >The full path to the ebuild&#8217;s working directory, where all build data should be
+ contained. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-30-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-30-1"
+class="td11"> <span
+class="ectt-1000">S </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-30-2"
+class="td11">
+ <!--l. 104--><p class="noindent" ><span
+class="ectt-1000">src_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-30-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-30-4"
+class="td11">
+ <!--l. 106--><p class="noindent" >The full path to the temporary build directory, used by <span
+class="ectt-1000">src_compile</span>,
+ <span
+class="ectt-1000">src_install </span>etc. Defaults to <span
+class="ectt-1000">${WORKDIR}/${P}</span>. May be modified by ebuilds. If
+ <span
+class="ectt-1000">S </span>is assigned in the global scope of an ebuild, then the restrictions of section&#x00A0;<a
+href="#x1-11400011.2">11.2<!--tex4ht:ref: sec:ebuild-env-state --></a>
+ for global variables apply. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-31-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-31-1"
+class="td11"> <span
+class="ectt-1000">PORTDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-31-2"
+class="td11">
+ <!--l. 111--><p class="noindent" ><span
+class="ectt-1000">src_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-31-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-31-4"
+class="td11">
+ <!--l. 113--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">portdir</span></span></span> The full path to the master repository&#8217;s base directory. Only for EAPIs
+ listed in table&#x00A0;<a
+href="#x1-109008r3">11.3<!--tex4ht:ref: tab:removed-env-vars-table --></a> as supporting <span
+class="ectt-1000">PORTDIR</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-32-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-32-1"
+class="td11"> <span
+class="ectt-1000">ECLASSDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-32-2"
+class="td11">
+ <!--l. 116--><p class="noindent" ><span
+class="ectt-1000">src_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-32-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-32-4"
+class="td11">
+ <!--l. 118--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">eclassdir</span></span></span> The full path to the master repository&#8217;s eclass directory. Only for
+ EAPIs listed in table&#x00A0;<a
+href="#x1-109008r3">11.3<!--tex4ht:ref: tab:removed-env-vars-table --></a> as supporting <span
+class="ectt-1000">ECLASSDIR</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-33-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-33-1"
+class="td11"> <span
+class="ectt-1000">ROOT </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-33-2"
+class="td11">
+ <!--l. 121--><p class="noindent" ><span
+class="ectt-1000">pkg_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-33-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-33-4"
+class="td11">
+ <!--l. 123--><p class="noindent" >The absolute path to the root directory into which the package is to be merged.
+ Phases which run with full filesystem access must not touch any files outside of
+ the directory given in <span
+class="ectt-1000">ROOT</span>. Also of note is that in a cross-compiling environment,
+ binaries inside of <span
+class="ectt-1000">ROOT </span>will not be executable on the build machine, so ebuilds
+ must not call them. The presence of a trailing slash is EAPI dependent as listed
+ in table&#x00A0;<a
+href="#x1-113001r7">11.7<!--tex4ht:ref: tab:trailing-slash --></a>. </p></td>
+
+
+
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-34-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-34-1"
+class="td11"> <span
+class="ectt-1000">EROOT </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-34-2"
+class="td11">
+ <!--l. 129--><p class="noindent" ><span
+class="ectt-1000">pkg_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-34-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-34-4"
+class="td11">
+ <!--l. 131--><p class="noindent" >Contains the concatenation of the paths in the <span
+class="ectt-1000">ROOT </span>and <span
+class="ectt-1000">EPREFIX </span>variables, for
+ convenience. See also the <span
+class="ectt-1000">EPREFIX </span>variable. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a>
+ as supporting <span
+class="ectt-1000">EROOT</span>. The presence of a trailing slash is EAPI dependent as listed
+ in table&#x00A0;<a
+href="#x1-113001r7">11.7<!--tex4ht:ref: tab:trailing-slash --></a>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-35-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-35-1"
+class="td11"> <span
+class="ectt-1000">SYSROOT </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-35-2"
+class="td11">
+ <!--l. 136--><p class="noindent" ><span
+class="ectt-1000">src_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-35-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-35-4"
+class="td11">
+ <!--l. 138--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">sysroot</span></span></span> The absolute path to the root directory containing build dependencies
+ satisfied by <span
+class="ectt-1000">DEPEND</span>. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a> as supporting <span
+class="ectt-1000">SYSROOT</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-36-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-36-1"
+class="td11"> <span
+class="ectt-1000">ESYSROOT </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-36-2"
+class="td11">
+ <!--l. 142--><p class="noindent" ><span
+class="ectt-1000">src_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-36-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-36-4"
+class="td11">
+ <!--l. 144--><p class="noindent" >Contains the concatenation of the paths in the <span
+class="ectt-1000">SYSROOT </span>and <span
+class="ectt-1000">EPREFIX </span>variables,
+ for convenience. See also the <span
+class="ectt-1000">EPREFIX </span>variable. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a>
+ as supporting <span
+class="ectt-1000">ESYSROOT</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-37-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-37-1"
+class="td11"> <span
+class="ectt-1000">BROOT </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-37-2"
+class="td11">
+ <!--l. 148--><p class="noindent" ><span
+class="ectt-1000">src_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-37-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-37-4"
+class="td11">
+ <!--l. 150--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">broot</span></span></span> The absolute path to the root directory containing build dependencies
+ satisfied by <span
+class="ectt-1000">BDEPEND</span>, typically executable build tools. This includes any
+ applicable offset prefix. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a> as supporting <span
+class="ectt-1000">BROOT</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-38-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-38-1"
+class="td11"> </td></tr>
+ <tr
+ style="vertical-align:baseline;" id="TBL-31-39-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-39-1"
+class="td11"> <span
+class="ectt-1000">T </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-39-2"
+class="td11">
+ <!--l. 155--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-39-3"
+class="td11"> Partially<span class="footnote-mark"><a
+href="#fn5x12" id="fn5x12-bk"><sup class="textsuperscript">5</sup></a></span><a
+ id="x1-109006f5"></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-31-39-4"
+class="td11">
+ <!--l. 159--><p class="noindent" >The full path to a temporary directory for use by the ebuild. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-40-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-40-1"
+class="td11"> <span
+class="ectt-1000">TMPDIR </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-40-2"
+class="td11">
+ <!--l. 161--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-40-3"
+class="td11"> Ditto </td><td style="white-space:wrap; text-align:left;" id="TBL-31-40-4"
+class="td11">
+ <!--l. 163--><p class="noindent" >Must be set to the location of a usable temporary directory, for any applications
+ called by an ebuild. Must not be used by ebuilds directly; see <span
+class="ectt-1000">T </span>above. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-41-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-41-1"
+class="td11"> <span
+class="ectt-1000">HOME </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-41-2"
+class="td11">
+ <!--l. 166--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-41-3"
+class="td11"> Ditto </td><td style="white-space:wrap; text-align:left;" id="TBL-31-41-4"
+class="td11">
+ <!--l. 168--><p class="noindent" >The full path to an appropriate temporary directory for use by any programs
+ invoked by the ebuild that may read or modify the home directory. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-42-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-42-1"
+class="td11"> <span
+class="ectt-1000">EPREFIX </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-42-2"
+class="td11">
+ <!--l. 171--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-42-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-42-4"
+class="td11">
+ <!--l. 173--><p class="noindent" >The normalised offset-prefix path of an offset installation. When <span
+class="ectt-1000">EPREFIX </span>is not
+ set in the calling environment, <span
+class="ectt-1000">EPREFIX </span>defaults to the built-in offset-prefix that
+ was set during installation of the package manager. When a different <span
+class="ectt-1000">EPREFIX</span>
+ value than the built-in value is set in the calling environment, a cross-prefix build
+ is performed where using the existing utilities, a package is built for the given
+ <span
+class="ectt-1000">EPREFIX</span>, akin to <span
+class="ectt-1000">ROOT</span>. See also&#x00A0;<a
+href="#x1-11200011.1.3">11.1.3<!--tex4ht:ref: sec:offset-vars --></a>. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a> as
+ supporting <span
+class="ectt-1000">EPREFIX</span>. </p></td>
+
+
+
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-43-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-43-1"
+class="td11"> <span
+class="ectt-1000">D </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-43-2"
+class="td11">
+ <!--l. 181--><p class="noindent" ><span
+class="ectt-1000">src_install</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-43-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-43-4"
+class="td11">
+ <!--l. 183--><p class="noindent" >Contains the full path to the image directory into which the package should
+ be installed. The presence of a trailing slash is EAPI dependent as listed in
+ table&#x00A0;<a
+href="#x1-113001r7">11.7<!--tex4ht:ref: tab:trailing-slash --></a>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-44-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-44-1"
+class="td11"> <span
+class="ectt-1000">D </span>(continued) </td><td style="white-space:wrap; text-align:left;" id="TBL-31-44-2"
+class="td11">
+ <!--l. 187--><p class="noindent" ><span
+class="ectt-1000">pkg_preinst</span>,
+ <span
+class="ectt-1000">pkg_postinst</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-44-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-44-4"
+class="td11">
+ <!--l. 189--><p class="noindent" >Contains the full path to the image that is about to be or has just been merged.
+ The presence of a trailing slash is EAPI dependent as listed in table&#x00A0;<a
+href="#x1-113001r7">11.7<!--tex4ht:ref: tab:trailing-slash --></a>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-45-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-45-1"
+class="td11"> <span
+class="ectt-1000">ED </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-45-2"
+class="td11">
+ <!--l. 193--><p class="noindent" ><span
+class="ectt-1000">src_install</span>,
+ <span
+class="ectt-1000">pkg_preinst</span>,
+ <span
+class="ectt-1000">pkg_postinst</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-45-3"
+class="td11"> See <span
+class="ectt-1000">D </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-45-4"
+class="td11">
+ <!--l. 195--><p class="noindent" >Contains the concatenation of the paths in the <span
+class="ectt-1000">D </span>and <span
+class="ectt-1000">EPREFIX </span>variables, for
+ convenience. See also the <span
+class="ectt-1000">EPREFIX </span>variable. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a>
+ as supporting <span
+class="ectt-1000">ED</span>. The presence of a trailing slash is EAPI dependent as listed in
+ table&#x00A0;<a
+href="#x1-113001r7">11.7<!--tex4ht:ref: tab:trailing-slash --></a>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-46-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-46-1"
+class="td11"> <span
+class="ectt-1000">DESTTREE </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-46-2"
+class="td11">
+ <!--l. 200--><p class="noindent" ><span
+class="ectt-1000">src_install</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-46-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-46-4"
+class="td11">
+ <!--l. 202--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">desttree</span></span></span> Controls the location where <span
+class="ectt-1000">dobin</span>, <span
+class="ectt-1000">dolib</span>, <span
+class="ectt-1000">domo</span>, and <span
+class="ectt-1000">dosbin </span>install
+ things. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109008r3">11.3<!--tex4ht:ref: tab:removed-env-vars-table --></a> as supporting <span
+class="ectt-1000">DESTTREE</span>. In all other
+ EAPIs, this is retained as a conceptual variable not exported to the ebuild
+ environment. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-47-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-47-1"
+class="td11"> <span
+class="ectt-1000">INSDESTTREE </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-47-2"
+class="td11">
+ <!--l. 207--><p class="noindent" ><span
+class="ectt-1000">src_install</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-47-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-47-4"
+class="td11">
+ <!--l. 209--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">insdesttree</span></span></span> Controls the location where <span
+class="ectt-1000">doins </span>installs things. Only for EAPIs
+ listed in table&#x00A0;<a
+href="#x1-109008r3">11.3<!--tex4ht:ref: tab:removed-env-vars-table --></a> as supporting <span
+class="ectt-1000">INSDESTTREE</span>. In all other EAPIs, this is
+ retained as a conceptual variable not exported to the ebuild environment. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-48-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-48-1"
+class="td11"> <span
+class="ectt-1000">USE </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-48-2"
+class="td11">
+ <!--l. 213--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-48-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-48-4"
+class="td11">
+ <!--l. 215--><p class="noindent" >A whitespace-delimited list of all active USE flags for this ebuild. See
+ section&#x00A0;<a
+href="#x1-11000011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for details. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-49-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-49-1"
+class="td11"> <span
+class="ectt-1000">EBUILD_PHASE </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-49-2"
+class="td11">
+ <!--l. 218--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-49-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-49-4"
+class="td11">
+ <!--l. 220--><p class="noindent" >Takes one of the values <span
+class="ectt-1000">config</span>, <span
+class="ectt-1000">setup</span>, <span
+class="ectt-1000">nofetch</span>, <span
+class="ectt-1000">unpack</span>, <span
+class="ectt-1000">prepare</span>, <span
+class="ectt-1000">configure</span>,
+ <span
+class="ectt-1000">compile</span>, <span
+class="ectt-1000">test</span>, <span
+class="ectt-1000">install</span>, <span
+class="ectt-1000">preinst</span>, <span
+class="ectt-1000">postinst</span>, <span
+class="ectt-1000">prerm</span>, <span
+class="ectt-1000">postrm</span>, <span
+class="ectt-1000">info</span>, <span
+class="ectt-1000">pretend</span>
+ according to the top level ebuild function that was executed by the package
+ manager. May be unset or any single word that is not any of the above when the
+ ebuild is being sourced for other (e. g.&#x00A0;metadata or QA) purposes. </p></td>
+
+
+
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-50-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-50-1"
+class="td11"> <span
+class="ectt-1000">EBUILD_PHASE_FUNC </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-50-2"
+class="td11">
+ <!--l. 226--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-50-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-50-4"
+class="td11">
+ <!--l. 228--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">ebuild-phase-func</span></span></span> Takes one of the values <span
+class="ectt-1000">pkg_config</span>, <span
+class="ectt-1000">pkg_setup</span>,
+ <span
+class="ectt-1000">pkg_nofetch</span>, <span
+class="ectt-1000">src_unpack</span>, <span
+class="ectt-1000">src_prepare</span>, <span
+class="ectt-1000">src_configure</span>, <span
+class="ectt-1000">src_compile</span>,
+ <span
+class="ectt-1000">src_test</span>, <span
+class="ectt-1000">src_install</span>, <span
+class="ectt-1000">pkg_preinst</span>, <span
+class="ectt-1000">pkg_postinst</span>, <span
+class="ectt-1000">pkg_prerm</span>, <span
+class="ectt-1000">pkg_postrm</span>,
+ <span
+class="ectt-1000">pkg_info</span>, <span
+class="ectt-1000">pkg_pretend </span>according to the top level ebuild function that was
+ executed by the package manager. May be unset or any single word that is not any
+ of the above when the ebuild is being sourced for other (e. g.&#x00A0;metadata or QA)
+ purposes. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a> as supporting <span
+class="ectt-1000">EBUILD_PHASE_FUNC</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-51-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-51-1"
+class="td11"> <span
+class="ectt-1000">KV </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-51-2"
+class="td11">
+ <!--l. 236--><p class="noindent" >All </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-51-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-51-4"
+class="td11">
+ <!--l. 238--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">kv</span></span></span> The version of the running kernel at the time the ebuild was first executed, as
+ returned by the <span
+class="ectt-1000">uname&#x00A0;-r </span>command or equivalent. May be modified by ebuilds.
+ Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109008r3">11.3<!--tex4ht:ref: tab:removed-env-vars-table --></a> as supporting <span
+class="ectt-1000">KV</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-52-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-52-1"
+class="td11"> <span
+class="ectt-1000">MERGE_TYPE </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-52-2"
+class="td11">
+ <!--l. 242--><p class="noindent" ><span
+class="ectt-1000">pkg_*</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-52-3"
+class="td11"> No </td><td style="white-space:wrap; text-align:left;" id="TBL-31-52-4"
+class="td11">
+ <!--l. 244--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">merge-type</span></span></span> The type of package that is being merged. Possible values are:
+ <span
+class="ectt-1000">source </span>if building and installing a package from source, <span
+class="ectt-1000">binary </span>if installing a
+ binary package, and <span
+class="ectt-1000">buildonly </span>if building a binary package without installing
+ it. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a> as supporting <span
+class="ectt-1000">MERGE_TYPE</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-53-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-53-1"
+class="td11"> <span
+class="ectt-1000">REPLACING_VERSIONS </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-53-2"
+class="td11">
+ <!--l. 249--><p class="noindent" ><span
+class="ectt-1000">pkg_*</span>
+ (see
+ text) </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-53-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-53-4"
+class="td11">
+ <!--l. 251--><p class="noindent" >A list of all versions of this package (including revision, if specified), whitespace
+ separated with no leading or trailing whitespace, that are being replaced
+ (uninstalled or overwritten) as a result of this install. See section&#x00A0;<a
+href="#x1-11100011.1.2">11.1.2<!--tex4ht:ref: sec:replacing-versions --></a>. Only
+ for EAPIs listed in table&#x00A0;<a
+href="#x1-109007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a> as supporting <span
+class="ectt-1000">REPLACING_VERSIONS</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-54-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-54-1"
+class="td11"> <span
+class="ectt-1000">REPLACED_BY_VERSION </span></td><td style="white-space:wrap; text-align:left;" id="TBL-31-54-2"
+class="td11">
+ <!--l. 256--><p class="noindent" ><span
+class="ectt-1000">pkg_prerm</span>,
+ <span
+class="ectt-1000">pkg_postrm</span> </p></td><td style="white-space:nowrap; text-align:left;" id="TBL-31-54-3"
+class="td11"> Yes </td><td style="white-space:wrap; text-align:left;" id="TBL-31-54-4"
+class="td11">
+ <!--l. 258--><p class="noindent" >The single version of this package (including revision, if specified) that is
+ replacing us, if we are being uninstalled as part of an install, or an empty string
+ otherwise. See section&#x00A0;<a
+href="#x1-11100011.1.2">11.1.2<!--tex4ht:ref: sec:replacing-versions --></a>. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-109007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a> as supporting
+ <span
+class="ectt-1000">REPLACED_BY_VERSION</span>. </p></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-55-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-55-1"
+class="td11"> </td> </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-56-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-56-1"
+class="td11"></td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-57-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-57-1"
+class="td11"> </td> </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-58-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-58-1"
+class="td11"></td>
+</tr>
+ <tr
+ style="vertical-align:baseline;" id="TBL-31-15-"><td colspan="4" style="white-space:nowrap; text-align:left;" id="TBL-31-15-1"
+class="td11"><!--cmidrule--> </td></tr><tr
+ style="vertical-align:baseline;" id="TBL-31-16-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-16-1"
+class="td11"> </td>
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-31-17-"><td style="white-space:nowrap; text-align:left;" id="TBL-31-17-1"
+class="td11"> </td></tr>
+</table></div>
+
+
+
+
+
+
+<div class="table">
+
+
+<!--l. 266--><p class="noindent" ><a
+ id="x1-109007r2"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;11.2: </span><span
+class="content">EAPIs supporting various added env variables</span></div><!--tex4ht:label?: x1-109007r2 -->
+<div class="tabular">
+ <table id="TBL-32" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-32-1g"><col
+id="TBL-32-1" /><col
+id="TBL-32-2" /><col
+id="TBL-32-3" /><col
+id="TBL-32-4" /><col
+id="TBL-32-5" /><col
+id="TBL-32-6" /><col
+id="TBL-32-7" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-32-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-32-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:wrap; text-align:left;" id="TBL-32-1-2"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ectt-1000">MERGE_TYPE</span><span
+class="ecbx-1000">?</span></div></td><td style="white-space:wrap; text-align:left;" id="TBL-32-1-3"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ectt-1000">REPLACING_VERSIONS</span><span
+class="ecbx-1000">?</span></div></td><td style="white-space:wrap; text-align:left;" id="TBL-32-1-4"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ectt-1000">REPLACED_BY_VERSION</span><span
+class="ecbx-1000">?</span></div></td><td style="white-space:wrap; text-align:left;" id="TBL-32-1-5"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ectt-1000">EBUILD_PHASE_FUNC</span><span
+class="ecbx-1000">?</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-32-1-6"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">SYSROOT</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-32-1-7"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">BROOT</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-32-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-2-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-2-4"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-2-5"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-2-6"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-2-7"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-32-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-3-1"
+class="td11"> 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-3-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-3-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-3-5"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-3-6"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-3-7"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-32-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-4-1"
+class="td11"> 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-4-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-4-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-4-5"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-4-6"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-4-7"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-32-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-5-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-5-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-5-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-5-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-5-5"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-5-6"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-32-5-7"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-32-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-32-6-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 287--><p class="noindent" ><a
+ id="x1-109008r3"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;11.3: </span><span
+class="content">EAPIs supporting various removed env variables</span></div><!--tex4ht:label?: x1-109008r3 -->
+<div class="tabular">
+ <table id="TBL-33" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-33-1g"><col
+id="TBL-33-1" /><col
+id="TBL-33-2" /><col
+id="TBL-33-3" /><col
+id="TBL-33-4" /><col
+id="TBL-33-5" /><col
+id="TBL-33-6" /><col
+id="TBL-33-7" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-33-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-33-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-33-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">AA</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-33-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">KV</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-33-1-4"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">PORTDIR</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-33-1-5"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">ECLASSDIR</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-33-1-6"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">DESTTREE</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-33-1-7"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">INSDESTTREE</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-33-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-33-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-2-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-2-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-2-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-2-5"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-2-6"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-2-7"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-33-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-33-3-1"
+class="td11"> 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-3-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-3-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-3-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-3-5"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-3-6"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-3-7"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-33-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-33-4-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-4-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-4-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-4-4"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-4-5"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-4-6"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-33-4-7"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-33-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-33-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 307--><p class="noindent" ><a
+ id="x1-109009r4"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;11.4: </span><span
+class="content">EAPIs supporting offset-prefix env variables</span></div><!--tex4ht:label?: x1-109009r4 -->
+<div class="tabular">
+ <table id="TBL-34" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-34-1g"><col
+id="TBL-34-1" /><col
+id="TBL-34-2" /><col
+id="TBL-34-3" /><col
+id="TBL-34-4" /><col
+id="TBL-34-5" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-34-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-34-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-34-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">EPREFIX</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-34-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">EROOT</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-34-1-4"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">ED</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-34-1-5"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">ESYSROOT</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-34-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-2-1"
+class="td11"> 0, 1, 2 </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-2-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-2-4"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-2-5"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-34-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-3-1"
+class="td11"> 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-3-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-3-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-3-5"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-34-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-4-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-4-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-4-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-34-4-5"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-34-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-34-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<!--l. 324--><p class="noindent" >Except where otherwise noted, all variables set in the active profiles&#8217; <span
+class="ectt-1000">make.defaults </span>files must be
+exported to the ebuild environment. <span
+class="ectt-1000">CHOST</span>, <span
+class="ectt-1000">CBUILD </span>and <span
+class="ectt-1000">CTARGET</span>, if not set by profiles, must
+contain either an appropriate machine tuple (the definition of appropriate is beyond the scope of
+this specification) or be unset.
+</p><!--l. 329--><p class="noindent" ><span
+class="ectt-1000">PATH </span>must be initialized by the package manager to a &#8220;usable&#8221; default. The exact value here is left
+up to interpretation, but it should include the equivalent &#8220;sbin&#8221; and &#8220;bin&#8221; and any package
+manager specific directories.
+</p><!--l. 333--><p class="noindent" ><span
+class="ectt-1000">GZIP</span>, <span
+class="ectt-1000">BZIP</span>, <span
+class="ectt-1000">BZIP2</span>, <span
+class="ectt-1000">CDPATH</span>, <span
+class="ectt-1000">GREP_OPTIONS</span>, <span
+class="ectt-1000">GREP_COLOR </span>and <span
+class="ectt-1000">GLOBIGNORE </span>must not be set.
+<span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">env-unset</span></span></span> In addition, any variable whose name appears in the <span
+class="ectt-1000">ENV_UNSET </span>variable must be
+unset, for EAPIs listed in table&#x00A0;<a
+href="#x1-56002r5">5.5<!--tex4ht:ref: tab:profile-env-unset --></a> as supporting <span
+class="ectt-1000">ENV_UNSET</span>.
+</p><!--l. 338--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">locale-settings</span></span></span> The package manager must ensure that the <span
+class="ectt-1000">LC_CTYPE </span>and <span
+class="ectt-1000">LC_COLLATE</span>
+locale categories are equivalent to the POSIX locale, as far as characters in the ASCII
+range (U+0000 to U+007F) are concerned. Only for EAPIs listed in such a manner in
+table&#x00A0;<a
+href="#x1-109010r5">11.5<!--tex4ht:ref: tab:locale-settings --></a>.
+</p>
+<div class="table">
+
+
+<!--l. 344--><p class="noindent" ><a
+ id="x1-109010r5"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;11.5: </span><span
+class="content">Locale settings for EAPIs</span></div><!--tex4ht:label?: x1-109010r5 -->
+<div class="tabular">
+ <table id="TBL-35" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-35-1g"><col
+id="TBL-35-1" /><col
+id="TBL-35-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-35-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-35-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-35-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Sane </span><span
+class="ectt-1000">LC_CTYPE </span><span
+class="ecbx-1000">and </span><span
+class="ectt-1000">LC_COLLATE</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-35-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-35-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-35-2-2"
+class="td11"> Undefined </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-35-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-35-3-1"
+class="td11"> 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-35-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-35-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-35-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">11.1.1 </span> <a
+ id="x1-11000011.1.1"></a>USE and IUSE handling</h4>
+<!--l. 360--><p class="nopar" >This section discusses the handling of four variables:
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">IUSE</span> </dt><dd
+class="description">is the variable calculated from the <span
+class="ectt-1000">IUSE </span>values defined in ebuilds and eclasses.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">IUSE_REFERENCEABLE</span> </dt><dd
+class="description">is a variable calculated from <span
+class="ectt-1000">IUSE </span>and a variety of other
+ sources described below. It is purely a conceptual variable; it is not exported to the
+ ebuild environment. Values in <span
+class="ectt-1000">IUSE_REFERENCEABLE </span>may legally be used in queries
+ from other packages about an ebuild&#8217;s state (for example, for use dependencies).
+ </dd><dt class="description">
+<span
+class="ecbx-1000">IUSE_EFFECTIVE</span> </dt><dd
+class="description">is another
+ conceptual, unexported variable. Values in <span
+class="ectt-1000">IUSE_EFFECTIVE </span>are those which an ebuild
+ may legally use in queries about itself (for example, for the <span
+class="ectt-1000">use </span>function, and for use
+ in dependency specification conditional blocks).
+ </dd><dt class="description">
+<span
+class="ecbx-1000">USE</span> </dt><dd
+class="description">is a variable calculated by the package manager and exported to the ebuild
+ environment.</dd></dl>
+<!--l. 374--><p class="noindent" >In all cases, the values of <span
+class="ectt-1000">IUSE_REFERENCEABLE </span>and <span
+class="ectt-1000">IUSE_EFFECTIVE </span>are undefined during
+metadata generation.
+</p><!--l. 377--><p class="noindent" >For EAPIs listed in table&#x00A0;<a
+href="#x1-56001r4">5.4<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as not supporting profile defined <span
+class="ectt-1000">IUSE </span>injection, <span
+class="ectt-1000">IUSE_REFERENCEABLE </span>is
+equal to the calculated <span
+class="ectt-1000">IUSE </span>value. For EAPIs where profile defined <span
+class="ectt-1000">IUSE </span>injection is supported,
+<span
+class="ectt-1000">IUSE_REFERENCEABLE </span>is equal to <span
+class="ectt-1000">IUSE_EFFECTIVE</span>.
+</p><!--l. 382--><p class="noindent" >For EAPIs listed in table&#x00A0;<a
+href="#x1-56001r4">5.4<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as not supporting profile defined <span
+class="ectt-1000">IUSE </span>injection, <span
+class="ectt-1000">IUSE_EFFECTIVE</span>
+contains the following values:
+</p><!--l. 386--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">All values in the calculated <span
+class="ectt-1000">IUSE </span>value.
+ </li>
+ <li class="compactitem">All possible values for the <span
+class="ectt-1000">ARCH </span>variable.
+ </li>
+ <li class="compactitem">All legal use flag names whose name starts with the lowercase equivalent of any value
+ in the profile <span
+class="ectt-1000">USE_EXPAND </span>variable followed by an underscore.</li></ul>
+<!--l. 392--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">profile-iuse-inject</span></span></span> For EAPIs listed in table&#x00A0;<a
+href="#x1-56001r4">5.4<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span
+class="ectt-1000">IUSE </span>injection,
+<span
+class="ectt-1000">IUSE_EFFECTIVE </span>contains the following values:
+</p><!--l. 396--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">All values in the calculated <span
+class="ectt-1000">IUSE </span>value.
+ </li>
+ <li class="compactitem">All values in the profile <span
+class="ectt-1000">IUSE_IMPLICIT </span>variable.
+ </li>
+ <li class="compactitem">All values in the profile variable named <span
+class="ectt-1000">USE_EXPAND_VALUES_${v}</span>, where <span
+class="ectt-1000">${v}</span>
+ is any value in the intersection of the profile <span
+class="ectt-1000">USE_EXPAND_UNPREFIXED </span>and
+ <span
+class="ectt-1000">USE_EXPAND_IMPLICIT </span>variables.
+
+
+ </li>
+ <li class="compactitem">All values for <span
+class="ectt-1000">${lower_v}_${x}</span>, where <span
+class="ectt-1000">${x} </span>is all values in the profile variable named
+ <span
+class="ectt-1000">USE_EXPAND_VALUES_${v}</span>, where <span
+class="ectt-1000">${v} </span>is any value in the intersection of the profile
+ <span
+class="ectt-1000">USE_EXPAND </span>and <span
+class="ectt-1000">USE_EXPAND_IMPLICIT </span>variables and <span
+class="ectt-1000">${lower_v} </span>is the lowercase
+ equivalent of <span
+class="ectt-1000">${v}</span>.</li></ul>
+<!--l. 407--><p class="noindent" >The <span
+class="ectt-1000">USE </span>variable is set by the package manager. For each value in <span
+class="ectt-1000">IUSE_EFFECTIVE</span>, <span
+class="ectt-1000">USE </span>shall
+contain that value if the flag is to be enabled for the ebuild in question, and shall not contain
+that value if it is to be disabled. In EAPIs listed in table&#x00A0;<a
+href="#x1-56001r4">5.4<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as not supporting profile
+defined <span
+class="ectt-1000">IUSE </span>injection, <span
+class="ectt-1000">USE </span>may contain other flag names that are not relevant for the
+ebuild.
+</p><!--l. 413--><p class="noindent" >For EAPIs listed in table&#x00A0;<a
+href="#x1-56001r4">5.4<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span
+class="ectt-1000">IUSE </span>injection, the variables named in
+<span
+class="ectt-1000">USE_EXPAND </span>and <span
+class="ectt-1000">USE_EXPAND_UNPREFIXED </span>shall have their profile-provided values reduced to
+contain only those values that are present in <span
+class="ectt-1000">IUSE_EFFECTIVE</span>.
+</p><!--l. 418--><p class="noindent" >For EAPIs listed in table&#x00A0;<a
+href="#x1-56001r4">5.4<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span
+class="ectt-1000">IUSE </span>injection, the package manager
+must save the calculated value of <span
+class="ectt-1000">IUSE_EFFECTIVE </span>when installing a package. Details are beyond
+the scope of this specification.
+</p><!--l. 422--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">11.1.2 </span> <a
+ id="x1-11100011.1.2"></a>REPLACING_VERSIONS and REPLACED_BY_VERSION</h4>
+<!--l. 425--><p class="nopar" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">replace-version-vars</span></span></span> In EAPIs listed in table&#x00A0;<a
+href="#x1-109007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a> as supporting it, the <span
+class="ectt-1000">REPLACING_VERSIONS</span>
+variable shall be defined in <span
+class="ectt-1000">pkg_preinst </span>and <span
+class="ectt-1000">pkg_postinst</span>. In addition, it <span
+class="ecti-1000">may </span>be defined in
+<span
+class="ectt-1000">pkg_pretend </span>and <span
+class="ectt-1000">pkg_setup</span>, although ebuild authors should take care to handle binary package
+creation and installation correctly when using it in these phases.
+</p><!--l. 431--><p class="noindent" ><span
+class="ectt-1000">REPLACING_VERSIONS </span>is a list, not a single optional value, to handle pathological cases such as
+installing <span
+class="ectt-1000">foo-2:2 </span>to replace <span
+class="ectt-1000">foo-2:1 </span>and <span
+class="ectt-1000">foo-3:2</span>.
+</p><!--l. 434--><p class="noindent" >In EAPIs listed in table&#x00A0;<a
+href="#x1-109007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a> as supporting it, the <span
+class="ectt-1000">REPLACED_BY_VERSION </span>variable shall be defined
+in <span
+class="ectt-1000">pkg_prerm </span>and <span
+class="ectt-1000">pkg_postrm</span>. It shall contain at most one value.
+</p><!--l. 438--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">11.1.3 </span> <a
+ id="x1-11200011.1.3"></a>Offset-prefix variables</h4>
+<div class="table">
+
+
+<!--l. 442--><p class="noindent" ><a
+ id="x1-112001r6"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;11.6: </span><span
+class="content">EAPIs supporting offset-prefix</span></div><!--tex4ht:label?: x1-112001r6 -->
+<div class="tabular">
+ <table id="TBL-36" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-36-1g"><col
+id="TBL-36-1" /><col
+id="TBL-36-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-36-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-36-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-36-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports offset-prefix?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-36-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-36-2-1"
+class="td11"> 0, 1, 2 </td><td style="white-space:nowrap; text-align:left;" id="TBL-36-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-36-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-36-3-1"
+class="td11"> 3, 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-36-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-36-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-36-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<!--l. 455--><p class="nopar" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">offset-prefix-vars</span></span></span> Table&#x00A0;<a
+href="#x1-112001r6">11.6<!--tex4ht:ref: tab:offset-support-table --></a> lists the EAPIs which support offset-prefix installations. This
+support was initially added in EAPI 3, in the form of three extra variables. Two of these, <span
+class="ectt-1000">EROOT</span>
+and <span
+class="ectt-1000">ED</span>, are convenience variables using the variable <span
+class="ectt-1000">EPREFIX</span>. In EAPIs that do not support an
+offset-prefix, the installation offset is hardwired to <span
+class="ectt-1000">/usr</span>. In offset-prefix supporting EAPIs the
+installation offset is set as <span
+class="ectt-1000">${EPREFIX}/usr </span>and hence can be adjusted using the variable <span
+class="ectt-1000">EPREFIX</span>.
+Note that the behaviour of offset-prefix aware and agnostic is the same when <span
+class="ectt-1000">EPREFIX </span>is set to the
+empty string in offset-prefix aware EAPIs. The latter do have the variables <span
+class="ectt-1000">ED </span>and <span
+class="ectt-1000">EROOT </span>properly
+set, though.
+</p>
+<h4 class="subsectionHead"><span class="titlemark">11.1.4 </span> <a
+ id="x1-11300011.1.4"></a>Path variables and trailing slash</h4>
+<!--l. 468--><p class="nopar" >Unless specified otherwise, the paths provided through package manager variables do not end with
+a trailing slash and cannot be empty. A few exceptions to that rule are listed in table&#x00A0;<a
+href="#x1-113001r7">11.7<!--tex4ht:ref: tab:trailing-slash --></a> along
+with applicable EAPIs.
+</p><!--l. 472--><p class="noindent" >For EAPIs where those variables are defined to always end with a trailing slash, the
+package manager guarantees that a trailing slash will always be appended to the path in
+question. If the path specifies the system root directory, it will consist of a single slash
+(<span
+class="ectt-1000">/</span>).
+</p><!--l. 476--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">trailing-slash</span></span></span> For EAPIs where those variables are defined to never end with a trailing slash,
+the package manager guarantees that a trailing slash will never be present. If the path specifies the
+system root directory, it will be empty.
+</p>
+<div class="table">
+
+
+<!--l. 481--><p class="noindent" ><a
+ id="x1-113001r7"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;11.7: </span><span
+class="content">Variables that always or never end with a trailing slash</span></div><!--tex4ht:label?: x1-113001r7 -->
+<div class="tabular">
+ <table id="TBL-37" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-37-1g"><col
+id="TBL-37-1" /><col
+id="TBL-37-2" /><col
+id="TBL-37-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-37-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-37-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td colspan="2" style="white-space:nowrap; text-align:center;" id="TBL-37-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Ends with a trailing slash?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-37-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-37-2-1"
+class="td11"> </td><td style="white-space:nowrap; text-align:left;" id="TBL-37-2-2"
+class="td11"> <span
+class="ectt-1000">ROOT</span>, <span
+class="ectt-1000">EROOT </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-37-2-3"
+class="td11"> <span
+class="ectt-1000">D</span>, <span
+class="ectt-1000">ED </span></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-37-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-37-3-1"
+class="td11"> 0, 1, 2, 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-37-3-2"
+class="td11"> always </td><td style="white-space:nowrap; text-align:left;" id="TBL-37-3-3"
+class="td11"> always </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-37-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-37-4-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-37-4-2"
+class="td11"> never </td><td style="white-space:nowrap; text-align:left;" id="TBL-37-4-3"
+class="td11"> never </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-37-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-37-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h3 class="sectionHead"><span class="titlemark">11.2 </span> <a
+ id="x1-11400011.2"></a>The State of Variables Between Functions</h3>
+<!--l. 4--><p class="nopar" >Exported and default scope variables are saved between functions. A non-local variable set in a
+function earlier in the call sequence must have its value preserved for later functions, including
+functions executed as part of a later uninstall.
+</p><!--l. 9--><p class="noindent" >
+</p><dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span><span
+class="ectt-1000">pkg_pretend </span>is <span
+class="ecti-1000">not </span>part of the normal call sequence, and does not take part in
+environment saving.</dd></dl>
+<!--l. 11--><p class="noindent" >Variables that were exported must remain exported in later functions; variables with default
+visibility may retain default visibility or be exported. Variables with special meanings to the
+package manager are excluded from this rule.
+</p><!--l. 15--><p class="noindent" >Global variables must only contain invariant values (see&#x00A0;<a
+href="#x1-600007.1">7.1<!--tex4ht:ref: sec:metadata-invariance --></a>). If a global variable&#8217;s value is
+invariant, it may have the value that would be generated at any given point in the build
+sequence.
+</p><!--l. 19--><p class="noindent" >This is demonstrated by code listing&#x00A0;<a
+href="#x1-114001r1">11.1<!--tex4ht:ref: lst:env-saving --></a>.
+
+
+</p><!--l. 22--><p class="noindent" ><a
+ id="x1-114001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing 11.1: </span><span
+class="content">Environment state between functions</span></div><!--tex4ht:label?: x1-114001r1 -->
+
+
+<div class="verbatim" id="verbatim-16">
+GLOBAL_VARIABLE="a"
+&#x00A0;<br />
+&#x00A0;<br />src_compile()
+&#x00A0;<br />{
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;GLOBAL_VARIABLE="b"
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;DEFAULT_VARIABLE="c"
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;export&#x00A0;EXPORTED_VARIABLE="d"
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;local&#x00A0;LOCAL_VARIABLE="e"
+&#x00A0;<br />}
+&#x00A0;<br />
+&#x00A0;<br />src_install(){
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;[[&#x00A0;${GLOBAL_VARIABLE}&#x00A0;==&#x00A0;"a"&#x00A0;]]&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;||&#x00A0;[[&#x00A0;${GLOBAL_VARIABLE}&#x00A0;==&#x00A0;"b"&#x00A0;]]&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;||&#x00A0;die&#x00A0;"broken&#x00A0;env&#x00A0;saving&#x00A0;for&#x00A0;globals"
+&#x00A0;<br />
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;[[&#x00A0;${DEFAULT_VARIABLE}&#x00A0;==&#x00A0;"c"&#x00A0;]]&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;||&#x00A0;die&#x00A0;"broken&#x00A0;env&#x00A0;saving&#x00A0;for&#x00A0;default"
+&#x00A0;<br />
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;[[&#x00A0;${EXPORTED_VARIABLE}&#x00A0;==&#x00A0;"d"&#x00A0;]]&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;||&#x00A0;die&#x00A0;"broken&#x00A0;env&#x00A0;saving&#x00A0;for&#x00A0;exported"
+&#x00A0;<br />
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;[[&#x00A0;$(printenv&#x00A0;EXPORTED_VARIABLE&#x00A0;)&#x00A0;==&#x00A0;"d"&#x00A0;]]&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;||&#x00A0;die&#x00A0;"broken&#x00A0;env&#x00A0;saving&#x00A0;for&#x00A0;exported"
+&#x00A0;<br />
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;[[&#x00A0;-z&#x00A0;${LOCAL_VARIABLE}&#x00A0;]]&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;||&#x00A0;die&#x00A0;"broken&#x00A0;env&#x00A0;saving&#x00A0;for&#x00A0;locals"
+&#x00A0;<br />}</div>
+<!--l. 51--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<h3 class="sectionHead"><span class="titlemark">11.3 </span> <a
+ id="x1-11500011.3"></a>The State of the System Between Functions</h3>
+<!--l. 3--><p class="nopar" >For the sake of this section:
+</p><!--l. 6--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">Variancy is any package manager action that modifies either <span
+class="ectt-1000">ROOT </span>or <span
+class="ectt-1000">/ </span>in any way that
+ isn&#8217;t merely a simple addition of something that doesn&#8217;t alter other packages. This
+ includes any non-default call to any <span
+class="ectt-1000">pkg </span>phase function except <span
+class="ectt-1000">pkg_setup</span>, a merge of
+ any package or an unmerge of any package.
+ </li>
+ <li class="compactitem">As an exception, changes to <span
+class="ectt-1000">DISTDIR </span>do not count as variancy.
+ </li>
+ <li class="compactitem">The <span
+class="ectt-1000">pkg_setup </span>function may be assumed not to introduce variancy. Thus, ebuilds
+ must not perform variant actions in this phase.</li></ul>
+<!--l. 16--><p class="noindent" >The following exclusivity and invariancy requirements are mandated:
+</p><!--l. 19--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">No variancy shall be introduced at any point between a package&#8217;s <span
+class="ectt-1000">pkg_setup </span>being
+ started up to the point that that package is merged, except for any variancy introduced
+ by that package.
+ </li>
+ <li class="compactitem">There must be no variancy between a package&#8217;s <span
+class="ectt-1000">pkg_setup </span>and a package&#8217;s
+ <span
+class="ectt-1000">pkg_postinst</span>, except for any variancy introduced by that package.
+ </li>
+ <li class="compactitem">Any non-default <span
+class="ectt-1000">pkg </span>phase function must be run exclusively.
+ </li>
+ <li class="compactitem">Each phase function must be called at most once during the build process for any given
+ package.</li></ul>
+
+
+
+
+
+
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;12</span><br /><a
+ id="x1-11600012"></a>Available Commands</h2>
+<!--l. 3--><p class="nopar" >This chapter documents the commands available to an ebuild. Unless otherwise specified, they may
+be aliases, shell functions, or executables in the ebuild&#8217;s <span
+class="ectt-1000">PATH</span>.
+</p><!--l. 6--><p class="noindent" >When an ebuild is being sourced for metadata querying rather than for a build (that is to say,
+when none of the <span
+class="ectt-1000">src_ </span>or <span
+class="ectt-1000">pkg_ </span>functions are to be called), no external command may be executed.
+The package manager may take steps to enforce this.
+</p>
+<h3 class="sectionHead"><span class="titlemark">12.1 </span> <a
+ id="x1-11700012.1"></a>System Commands</h3>
+<!--l. 12--><p class="nopar" >Any ebuild not listed in the system set for the active profile(s) may assume the presence of every
+command that is always provided by the system set for that profile. However, it must target the
+lowest common denominator of all systems on which it might be installed&#8212;in most
+cases this means that the only packages that can be assumed to be present are those
+listed in the <span
+class="ectt-1000">base </span>profile or equivalent, which is inherited by all available profiles. If an
+ebuild requires any applications not provided by the system profile, or that are provided
+conditionally based on USE flags, appropriate dependencies must be used to ensure their
+presence.
+</p><!--l. 20--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">12.1.1 </span> <a
+ id="x1-11800012.1.1"></a>Guaranteed system commands</h4>
+<!--l. 23--><p class="nopar" >The following commands must always be available in the ebuild environment:
+ </p><ul>
+ <li class="compactitem">All builtin commands in GNU bash, version as listed in table&#x00A0;<a
+href="#x1-58001r1">6.1<!--tex4ht:ref: tab:bash-version --></a> on page&#x00A0;<a
+href="#x1-58001r1">88<!--tex4ht:ref: tab:bash-version --></a>.
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">sed </span>must be available, and must support all forms of invocations valid for GNU sed
+ version 4 or later.
+ </li>
+ <li class="compactitem"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">gnu-patch</span></span></span> <span
+class="ectt-1000">patch </span>must be available, and must support all inputs valid for GNU patch,
+ version as listed in table&#x00A0;<a
+href="#x1-118001r1">12.1<!--tex4ht:ref: tab:system-commands-table --></a>.
+ </li>
+ <li class="compactitem"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">gnu-find</span></span></span> <span
+class="ectt-1000">find </span>and <span
+class="ectt-1000">xargs </span>must be available, and must support all forms of invocations
+ valid for GNU findutils version 4.4 or later. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-118001r1">12.1<!--tex4ht:ref: tab:system-commands-table --></a> as
+ requiring GNU find.</li></ul>
+<div class="table">
+
+
+<!--l. 37--><p class="noindent" ><a
+ id="x1-118001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.1: </span><span
+class="content">System commands for EAPIs</span></div><!--tex4ht:label?: x1-118001r1 -->
+<div class="tabular">
+ <table id="TBL-38" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-38-1g"><col
+id="TBL-38-1" /><col
+id="TBL-38-2" /><col
+id="TBL-38-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-38-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-38-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-38-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">GNU </span><span
+class="ectt-1000">find</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-38-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">GNU </span><span
+class="ectt-1000">patch </span><span
+class="ecbx-1000">version</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-38-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-38-2-1"
+class="td11"> 0, 1, 2, 3, 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-38-2-2"
+class="td11"> Undefined </td><td style="white-space:nowrap; text-align:left;" id="TBL-38-2-3"
+class="td11"> Any </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-38-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-38-3-1"
+class="td11"> 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-38-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-38-3-3"
+class="td11"> Any </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-38-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-38-4-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-38-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-38-4-3"
+class="td11"> 2.7 </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-38-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-38-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h3 class="sectionHead"><span class="titlemark">12.2 </span> <a
+ id="x1-11900012.2"></a>Commands Provided by Package Dependencies</h3>
+<!--l. 54--><p class="nopar" >In some cases a package&#8217;s build process will require the availability of executables not provided by
+the core system, a common example being autotools. The availability of commands provided by the
+particular types of dependencies is explained in section&#x00A0;<a
+href="#x1-680008.1">8.1<!--tex4ht:ref: sec:dependency-classes --></a>.
+</p><!--l. 1--><p class="nopar" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">12.3 </span> <a
+ id="x1-12000012.3"></a>Ebuild-specific Commands</h3>
+<!--l. 4--><p class="nopar" >The following commands will always be available in the ebuild environment, provided by the
+package manager. Except where otherwise noted, they may be internal (shell functions or aliases)
+or external commands available in <span
+class="ectt-1000">PATH</span>; where this is not specified, ebuilds may not rely upon
+either behaviour.
+</p><!--l. 9--><p class="noindent" >Unless otherwise noted, any output of these commands ends with a newline.
+</p><!--l. 11--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">12.3.1 </span> <a
+ id="x1-12100012.3.1"></a>Failure behaviour and related commands</h4>
+<!--l. 14--><p class="nopar" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">die-on-failure</span></span></span> Where a command is listed as having EAPI dependent failure behaviour, a failure
+shall either result in a non-zero exit status or abort the build process, as determined by
+table&#x00A0;<a
+href="#x1-121001r2">12.2<!--tex4ht:ref: tab:commands-die-table --></a>.
+</p><!--l. 18--><p class="noindent" >The following commands affect this behaviour:
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">nonfatal</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">nonfatal</span></span></span> Executes the remainder of its arguments as a command, preserving the
+ exit status. If this results in a command being called that would normally abort the
+ build process due to a failure, instead a non-zero exit status shall be returned. Only in
+ EAPIs listed in table&#x00A0;<a
+href="#x1-121001r2">12.2<!--tex4ht:ref: tab:commands-die-table --></a> as supporting <span
+class="ectt-1000">nonfatal</span>.
+ <!--l. 25--><p class="noindent" >In EAPIs listed in table&#x00A0;<a
+href="#x1-121001r2">12.2<!--tex4ht:ref: tab:commands-die-table --></a> as having <span
+class="ectt-1000">nonfatal </span>defined both as a shell function and
+ as an external command, the package manager must provide both implementations to
+ account for calling directly in ebuild scope or through <span
+class="ectt-1000">xargs</span>.
+ </p><!--l. 29--><p class="noindent" >Explicit <span
+class="ectt-1000">die </span>or <span
+class="ectt-1000">assert </span>commands only respect <span
+class="ectt-1000">nonfatal </span>when called with the <span
+class="ectt-1000">-n</span>
+ option and in EAPIs supporting this option, see table&#x00A0;<a
+href="#x1-126001r6">12.6<!--tex4ht:ref: tab:commands-die-table --></a>.</p></dd></dl>
+<div class="table">
+
+
+<!--l. 34--><p class="noindent" ><a
+ id="x1-121001r2"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.2: </span><span
+class="content">EAPI command failure behaviour</span></div><!--tex4ht:label?: x1-121001r2 -->
+<div class="tabular">
+ <table id="TBL-39" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-39-1g"><col
+id="TBL-39-1" /><col
+id="TBL-39-2" /><col
+id="TBL-39-3" /><col
+id="TBL-39-4" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-39-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-39-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:wrap; text-align:left;" id="TBL-39-1-2"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ecbx-1000">Command</span>
+ <span
+class="ecbx-1000">failure</span>
+ <span
+class="ecbx-1000">behaviour</span></div> </td><td style="white-space:wrap; text-align:left;" id="TBL-39-1-3"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ecbx-1000">Supports</span>
+ <span
+class="ectt-1000">nonfatal</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:wrap; text-align:left;" id="TBL-39-1-4"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ectt-1000">nonfatal</span>
+ <span
+class="ecbx-1000">is</span>
+ <span
+class="ecbx-1000">both</span>
+ <span
+class="ecbx-1000">a</span>
+ <span
+class="ecbx-1000">function</span>
+ <span
+class="ecbx-1000">and</span>
+ <span
+class="ecbx-1000">an</span>
+ <span
+class="ecbx-1000">external</span>
+ <span
+class="ecbx-1000">command?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-39-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-39-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-39-2-2"
+class="td11"> Non-zero exit </td><td style="white-space:nowrap; text-align:left;" id="TBL-39-2-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-39-2-4"
+class="td11"> n/a </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-39-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-39-3-1"
+class="td11"> 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-39-3-2"
+class="td11"> Aborts </td><td style="white-space:nowrap; text-align:left;" id="TBL-39-3-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-39-3-4"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-39-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-39-4-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-39-4-2"
+class="td11"> Aborts </td><td style="white-space:nowrap; text-align:left;" id="TBL-39-4-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-39-4-4"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-39-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-39-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.2 </span> <a
+ id="x1-12200012.3.2"></a>Banned commands</h4>
+<!--l. 53--><p class="nopar" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">banned-commands</span></span></span> Some commands are banned in some EAPIs. If a banned command is called,
+the package manager must abort the build process indicating an error.
+</p>
+<div class="table">
+
+
+<!--l. 57--><p class="noindent" ><a
+ id="x1-122001r3"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.3: </span><span
+class="content">Banned commands</span></div><!--tex4ht:label?: x1-122001r3 -->
+<div class="tabular">
+ <table id="TBL-40" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-40-1g"><col
+id="TBL-40-1" /><col
+id="TBL-40-2" /><col
+id="TBL-40-3" /><col
+id="TBL-40-4" /><col
+id="TBL-40-5" /><col
+id="TBL-40-6" /><col
+id="TBL-40-7" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-40-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-40-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td colspan="6" style="white-space:nowrap; text-align:center;" id="TBL-40-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Command banned?</span></div></td></tr><tr
+ style="vertical-align:baseline;" id="TBL-40-2-"><td style="white-space:nowrap; text-align:center;" id="TBL-40-2-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-40-2-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">dohard</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-40-2-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">dosed</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-40-2-4"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">einstall</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-40-2-5"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">dohtml</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-40-2-6"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">dolib</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-40-2-7"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">libopts</span></div>
+
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-40-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-40-3-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-3-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-3-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-3-4"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-3-5"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-3-6"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-3-7"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-40-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-40-4-1"
+class="td11"> 4, 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-4-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-4-4"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-4-5"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-4-6"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-4-7"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-40-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-40-5-1"
+class="td11"> 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-5-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-5-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-5-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-5-5"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-5-6"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-5-7"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-40-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-40-6-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-6-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-6-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-6-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-6-5"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-6-6"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-40-6-7"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-40-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-40-7-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.3 </span> <a
+ id="x1-12300012.3.3"></a>Sandbox commands</h4>
+<!--l. 80--><p class="nopar" >These commands affect the behaviour of the sandbox. Each command takes a single directory as
+argument. Ebuilds must not run any of these commands once the current phase function has
+returned.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">addread</span> </dt><dd
+class="description">Add a directory to the permitted read list.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">addwrite</span> </dt><dd
+class="description">Add a directory to the permitted write list.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">addpredict</span> </dt><dd
+class="description">Add a directory to the predict list. Any write to a location in this list will be
+ denied, but will not trigger access violation messages or abort the build process.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">adddeny</span> </dt><dd
+class="description">Add a directory to the deny list.</dd></dl>
+<!--l. 90--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">12.3.4 </span> <a
+ id="x1-12400012.3.4"></a>Package manager query commands</h4>
+<!--l. 91--><p class="nopar" >These commands are used to extract information about the system. Ebuilds must not run any of
+these commands in parallel with any other package manager command. Ebuilds must not run any
+of these commands once the current phase function has returned.
+</p><!--l. 95--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">pm-query-options</span></span></span> In EAPIs listed in table&#x00A0;<a
+href="#x1-124001r4">12.4<!--tex4ht:ref: tab:pm-query-options --></a> as supporting option <span
+class="ectt-1000">--host-root</span>, this flag as
+the first argument will cause the query to apply to the host root. Otherwise, it applies to
+<span
+class="ectt-1000">ROOT</span>.
+</p><!--l. 99--><p class="noindent" >In EAPIs listed in table&#x00A0;<a
+href="#x1-124001r4">12.4<!--tex4ht:ref: tab:pm-query-options --></a> as supporting options <span
+class="ectt-1000">-b</span>, <span
+class="ectt-1000">-d </span>and <span
+class="ectt-1000">-r</span>, these mutually exclusive flags as
+the first argument will cause the query to apply to locations targetted by <span
+class="ectt-1000">BDEPEND</span>, <span
+class="ectt-1000">DEPEND </span>and
+<span
+class="ectt-1000">RDEPEND</span>, respectively. When none of these options are given, <span
+class="ectt-1000">-r </span>is assumed.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">has_version</span> </dt><dd
+class="description">Takes exactly one package dependency specification as an argument. Returns
+ true if a package matching the specification is installed, and false otherwise.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">best_version</span> </dt><dd
+class="description">Takes exactly one package dependency specification as an argument. If
+ a matching package is installed, prints the category, package name and version of
+ the highest matching version; otherwise, prints an empty string. The exit code is
+ unspecified.</dd></dl>
+<div class="table">
+
+
+<!--l. 113--><p class="noindent" ><a
+ id="x1-124001r4"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.4: </span><span
+class="content">Package manager query command options supported by EAPIs</span></div><!--tex4ht:label?: x1-124001r4 -->
+<div class="tabular">
+ <table id="TBL-41" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-41-1g"><col
+id="TBL-41-1" /><col
+id="TBL-41-2" /><col
+id="TBL-41-3" /><col
+id="TBL-41-4" /><col
+id="TBL-41-5" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-41-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-41-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-41-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">--host-root</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-41-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">-b</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-41-1-4"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">-d</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-41-1-5"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">-r</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-41-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-41-2-1"
+class="td11"> 0, 1, 2, 3, 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-2-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-2-4"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-2-5"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-41-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-41-3-1"
+class="td11"> 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-3-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-3-4"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-3-5"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-41-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-41-4-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-4-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-4-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-4-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-41-4-5"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-41-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-41-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.5 </span> <a
+ id="x1-12500012.3.5"></a>Output commands</h4>
+<!--l. 131--><p class="nopar" >These commands display messages to the user. Unless otherwise stated, the entire argument list is
+used as a message, with backslash-escaped characters interpreted as for the <span
+class="ectt-1000">echo -e</span>
+command of bash, notably <span
+class="ectt-1000">\t </span>for a horizontal tab, <span
+class="ectt-1000">\n </span>for a new line, and <span
+class="ectt-1000">\\ </span>for a literal
+backslash. Ebuilds must not run any of these commands once the current phase function has
+returned.
+</p><!--l. 137--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">output-no-stdout</span></span></span> Unless otherwise noted, output may be sent to stderr or some other
+appropriate facility. In EAPIs listed in table&#x00A0;<a
+href="#x1-125001r5">12.5<!--tex4ht:ref: tab:output-commands --></a> as not allowing stdout output, using stdout as an
+output facility is forbidden.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">einfo</span> </dt><dd
+class="description">Displays an informational message.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">einfon</span> </dt><dd
+class="description">Displays an informational message without a trailing newline.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">elog</span> </dt><dd
+class="description">Displays an informational message of slightly higher importance. The package manager
+ may choose to log <span
+class="ectt-1000">elog </span>messages by default where <span
+class="ectt-1000">einfo </span>messages are not, for example.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">ewarn</span> </dt><dd
+class="description">Displays a warning message. Must not go to stdout.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">eqawarn</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">eqawarn</span></span></span> Display a QA warning message intended for ebuild developers. The
+ package manager may provide appropriate mechanisms to skip those messages for
+ normal users. Must not go to stdout. Only available in EAPIs listed in table&#x00A0;<a
+href="#x1-125001r5">12.5<!--tex4ht:ref: tab:output-commands --></a> as
+ supporting <span
+class="ectt-1000">eqawarn</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">eerror</span> </dt><dd
+class="description">Displays an error message. Must not go to stdout.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">ebegin</span> </dt><dd
+class="description">Displays an informational message. Should be used when beginning a possibly
+ lengthy process, and followed by a call to <span
+class="ectt-1000">eend</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">eend</span> </dt><dd
+class="description">Indicates that the process begun with an <span
+class="ectt-1000">ebegin </span>message has completed. Takes
+ one fixed argument, which is a numeric return code, and an optional message in all
+ subsequent arguments. If the first argument is 0, prints a success indicator; otherwise,
+ prints the message followed by a failure indicator. Returns its first argument as exit
+ status.</dd></dl>
+<div class="table">
+
+
+<!--l. 162--><p class="noindent" ><a
+ id="x1-125001r5"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.5: </span><span
+class="content">Output commands for EAPIs</span></div><!--tex4ht:label?: x1-125001r5 -->
+<div class="tabular">
+ <table id="TBL-42" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-42-1g"><col
+id="TBL-42-1" /><col
+id="TBL-42-2" /><col
+id="TBL-42-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-42-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-42-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-42-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Commands can output to stdout?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-42-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">eqawarn</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-42-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-42-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-42-2-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-42-2-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-42-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-42-3-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-42-3-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-42-3-3"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-42-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-42-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.6 </span> <a
+ id="x1-12600012.3.6"></a>Error commands</h4>
+<!--l. 177--><p class="nopar" >These commands are used when an error is detected that will prevent the build process from
+completing. Ebuilds must not run any of these commands once the current phase function has
+returned.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">die</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">nonfatal-die</span></span></span> If called under the <span
+class="ectt-1000">nonfatal </span>command (as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>) and
+ with <span
+class="ectt-1000">-n </span>as its first parameter, displays a failure message provided in its following
+ argument and then returns a non-zero exit status. Only in EAPIs listed in table&#x00A0;<a
+href="#x1-126001r6">12.6<!--tex4ht:ref: tab:die-properties --></a>
+ as supporting option&#x00A0;<span
+class="ectt-1000">-n</span>. Otherwise, displays a failure message provided in its first and
+ only argument, and then aborts the build process.
+ <!--l. 186--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">subshell-die</span></span></span> In EAPIs listed in table&#x00A0;<a
+href="#x1-126001r6">12.6<!--tex4ht:ref: tab:die-properties --></a> as not providing subshell support, <span
+class="ectt-1000">die </span>is
+ <span
+class="ecti-1000">not </span>guaranteed to work correctly if called from a subshell environment.
+ </p></dd><dt class="description">
+<span
+class="ecbx-1000">assert</span> </dt><dd
+class="description">Checks the value of the shell&#8217;s pipe status variable, and if any component is non-zero
+ (indicating failure), calls <span
+class="ectt-1000">die</span>, passing any parameters to it.</dd></dl>
+<div class="table">
+
+
+<!--l. 194--><p class="noindent" ><a
+ id="x1-126001r6"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.6: </span><span
+class="content">Properties of <span
+class="ectt-1000">die </span>and <span
+class="ectt-1000">assert </span>commands in EAPIs</span></div><!--tex4ht:label?: x1-126001r6 -->
+<div class="tabular">
+ <table id="TBL-43" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-43-1g"><col
+id="TBL-43-1" /><col
+id="TBL-43-2" /><col
+id="TBL-43-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-43-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-43-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td colspan="2" style="white-space:nowrap; text-align:center;" id="TBL-43-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">die </span><span
+class="ecbx-1000">and </span><span
+class="ectt-1000">assert</span></div></td></tr><tr
+ style="vertical-align:baseline;" id="TBL-43-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-43-2-1"
+class="td11"> </td><td style="white-space:nowrap; text-align:center;" id="TBL-43-2-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">support </span><span
+class="ectt-1000">-n</span><span
+class="ecbx-1000">?</span></div></td><td style="white-space:nowrap; text-align:center;" id="TBL-43-2-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">work in subshell?</span></div>
+
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-43-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-43-3-1"
+class="td11"> 0, 1, 2, 3, 4, 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-43-3-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-43-3-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-43-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-43-4-1"
+class="td11"> 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-43-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-43-4-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-43-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-43-5-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-43-5-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-43-5-3"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-43-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-43-6-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.7 </span> <a
+ id="x1-12700012.3.7"></a>Patch commands</h4>
+<!--l. 212--><p class="nopar" >These commands are used during the <span
+class="ectt-1000">src_prepare </span>phase to apply patches to the package&#8217;s
+sources. Ebuilds must not run any of these commands once the current phase function has
+returned.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">eapply</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">eapply</span></span></span> Takes zero or more GNU patch options, followed by one or more file or
+ directory paths. Processes options and applies all patches found in specified locations
+ according to algorithm&#x00A0;<a
+href="#x1-127001r1">12.1<!--tex4ht:ref: alg:eapply --></a>. If applying the patches fails, it aborts the build using
+ <span
+class="ectt-1000">die</span>, unless run using <span
+class="ectt-1000">nonfatal</span>, in which case it returns non-zero exit status. Only
+ available in EAPIs listed in table&#x00A0;<a
+href="#x1-127033r7">12.7<!--tex4ht:ref: tab:patch-commands --></a> as supporting <span
+class="ectt-1000">eapply</span>.
+ <div class="algorithm">
+ <!--l. 223--><p class="noindent" ><a
+ id="x1-127001r1"></a></p><hr class="float" /><div class="float"
+>
+ <div class="caption"
+><span class="id">Algorithm 12.1: </span><span
+class="content"><span
+class="ectt-1000">eapply </span>logic</span></div><!--tex4ht:label?: x1-127001r1 -->
+<div class="algorithmic">
+<a
+ id="x1-127002r115"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;any parameter is equal to <span
+class="ectt-1000">"--"</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-127003r116"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> collect all parameters before the first <span
+class="ectt-1000">"--" </span>in the <span
+class="ectt-1000">options </span>array <a
+ id="x1-127004r117"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> collect all parameters after the first <span
+class="ectt-1000">"--" </span>in the <span
+class="ectt-1000">files </span>array
+ </span><a
+ id="x1-127005r118"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;any parameter that begins with a hyphen follows one that does not&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-127006r119"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> abort the build process with an error
+ </span><a
+ id="x1-127007r120"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span><span class="else-body">
+<a
+ id="x1-127008r121"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> collect all parameters beginning with a hyphen in the <span
+class="ectt-1000">options </span>array <a
+ id="x1-127009r122"></a>
+ <br /><span class="ALCitem">8:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> collect all remaining parameters in the <span
+class="ectt-1000">files </span>array
+ </span><a
+ id="x1-127010r123"></a>
+ <br /><span class="ALCitem">9:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-127011r124"></a>
+<br /><span class="ALCitem">10:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;the <span
+class="ectt-1000">files </span>array is empty&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-127012r125"></a>
+<br /><span class="ALCitem">11:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> abort the build process with an error
+ </span><a
+ id="x1-127013r126"></a>
+<br /><span class="ALCitem">12:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-127014r127"></a>
+<br /><span class="ALCitem">13:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">for all</span>&#x00A0;<span
+class="ectt-1000">x </span>in the <span
+class="ectt-1000">files </span>array&#x00A0;<span
+class="ecbx-1000">do</span><span class="for-body">
+<a
+ id="x1-127015r128"></a>
+<br /><span class="ALCitem">14:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="ectt-1000">$x </span>is a directory&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-127016r129"></a>
+<br /><span class="ALCitem">15:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;<span
+class="ecbx-1000">not </span>any files match <span
+class="ectt-1000">$x/*.diff </span>or <span
+class="ectt-1000">$x/*.patch</span>&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-127017r130"></a>
+<br /><span class="ALCitem">16:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> abort the build process with an error
+ </span><a
+ id="x1-127018r131"></a>
+<br /><span class="ALCitem">17:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-127019r132"></a>
+<br /><span class="ALCitem">18:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">for all</span>&#x00A0;files <span
+class="ectt-1000">f </span>matching <span
+class="ectt-1000">$x/*.diff </span>or <span
+class="ectt-1000">$x/*.patch</span>, sorted in POSIX locale&#x00A0;<span
+class="ecbx-1000">do</span><span class="for-body">
+<a
+ id="x1-127020r133"></a>
+<br /><span class="ALCitem">19:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> call <span
+class="ectt-1000">patch -p1 -f -g0 --no-backup-if-mismatch "${options[@]}" &#x003C; "$f"</span> <a
+ id="x1-127021r134"></a>
+<br /><span class="ALCitem">20:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;child process returned with non-zero exit status&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-127022r135"></a>
+
+
+<br /><span class="ALCitem">21:</span><span class="ALIndent" style="width:44.98901pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;immediately with that status
+ </span><a
+ id="x1-127023r136"></a>
+<br /><span class="ALCitem">22:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-127024r137"></a>
+<br /><span class="ALCitem">23:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">for</span>
+ </span><a
+ id="x1-127025r138"></a>
+<br /><span class="ALCitem">24:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span><span class="else-body">
+<a
+ id="x1-127026r139"></a>
+<br /><span class="ALCitem">25:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> call <span
+class="ectt-1000">patch -p1 -f -g0 --no-backup-if-mismatch "${options[@]}" &#x003C; "$x"</span> <a
+ id="x1-127027r140"></a>
+<br /><span class="ALCitem">26:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;child process returned with non-zero exit status&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-127028r141"></a>
+<br /><span class="ALCitem">27:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;immediately with that status
+ </span><a
+ id="x1-127029r142"></a>
+<br /><span class="ALCitem">28:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-127030r143"></a>
+<br /><span class="ALCitem">29:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-127031r144"></a>
+<br /><span class="ALCitem">30:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">for</span><a
+ id="x1-127032r145"></a>
+<br /><span class="ALCitem">31:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;shell true (0)
+ </div> </div><hr class="endfloat" />
+ </div>
+ </dd><dt class="description">
+<span
+class="ecbx-1000">eapply_user</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">eapply-user</span></span></span> Takes no arguments. Package managers supporting it apply
+ user-provided patches to the source tree in the current working directory. Exact
+ behaviour is implementation defined and beyond the scope of this specification.
+ Package managers not supporting it must implement the command as a no-op.
+ Returns shell true (0) if patches applied successfully, or if no patches were provided.
+ Otherwise, aborts the build process, unless run using <span
+class="ectt-1000">nonfatal</span>, in which case it returns
+ non-zero exit status. Only available in EAPIs listed in table&#x00A0;<a
+href="#x1-127033r7">12.7<!--tex4ht:ref: tab:patch-commands --></a> as supporting
+ <span
+class="ectt-1000">eapply_user</span>. In EAPIs where it is supported, <span
+class="ectt-1000">eapply_user </span>must be called once in the
+ <span
+class="ectt-1000">src_prepare </span>phase. For any subsequent calls, the command will do nothing and
+ return&#x00A0;0.</dd></dl>
+<div class="table">
+
+
+<!--l. 271--><p class="noindent" ><a
+ id="x1-127033r7"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.7: </span><span
+class="content">Patch commands for EAPIs</span></div><!--tex4ht:label?: x1-127033r7 -->
+<div class="tabular">
+ <table id="TBL-44" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-44-1g"><col
+id="TBL-44-1" /><col
+id="TBL-44-2" /><col
+id="TBL-44-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-44-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-44-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-44-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">eapply</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-44-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">eapply_user</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-44-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-44-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-44-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-44-2-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-44-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-44-3-1"
+class="td11"> 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-44-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-44-3-3"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-44-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-44-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.8 </span> <a
+ id="x1-12800012.3.8"></a>Build commands</h4>
+<!--l. 286--><p class="nopar" >These commands are used during the <span
+class="ectt-1000">src_configure</span>, <span
+class="ectt-1000">src_compile</span>, and <span
+class="ectt-1000">src_install </span>phases to
+run the package&#8217;s build commands. Ebuilds must not run any of these commands once the current
+phase function has returned.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">econf</span> </dt><dd
+class="description">Calls the program&#8217;s <span
+class="ectt-1000">./configure </span>script. This is designed to work with GNU
+ Autoconf-generated scripts. Any additional parameters passed to <span
+class="ectt-1000">econf </span>are passed
+ directly to <span
+class="ectt-1000">./configure</span>, after the default options below. <span
+class="ectt-1000">econf </span>will look in the current
+ working directory for a configure script unless the <span
+class="ectt-1000">ECONF_SOURCE </span>environment variable
+ is set, in which case it is taken to be the directory containing it.
+ <!--l. 297--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">econf-options</span></span></span> <span
+class="ectt-1000">econf </span>must pass the following options to the configure script:
+ </p>
+ <ul class="itemize1">
+ <li class="itemize"><span
+class="ectt-1000">--prefix </span>must default to <span
+class="ectt-1000">${EPREFIX}/usr </span>unless overridden by <span
+class="ectt-1000">econf</span>&#8217;s caller.
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--mandir </span>must be <span
+class="ectt-1000">${EPREFIX}/usr/share/man</span>
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--infodir </span>must be <span
+class="ectt-1000">${EPREFIX}/usr/share/info</span>
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--datadir </span>must be <span
+class="ectt-1000">${EPREFIX}/usr/share</span>
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--sysconfdir </span>must be <span
+class="ectt-1000">${EPREFIX}/etc</span>
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--localstatedir </span>must be <span
+class="ectt-1000">${EPREFIX}/var/lib</span>
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--docdir </span>must be <span
+class="ectt-1000">${EPREFIX}/usr/share/doc/${PF}</span>, if the EAPI is listed in
+ table&#x00A0;<a
+href="#x1-128001r8">12.8<!--tex4ht:ref: tab:output-commands --></a> as using it. This option will only be passed if the string <span
+class="ectt-1000">--docdir</span>
+ occurs in the output of <span
+class="ectt-1000">configure --help</span>.
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--htmldir </span>must be <span
+class="ectt-1000">${EPREFIX}/usr/share/doc/${PF}/html</span>, if the EAPI is
+ listed in table&#x00A0;<a
+href="#x1-128001r8">12.8<!--tex4ht:ref: tab:output-commands --></a> as using it. This option will only be passed if the string
+ <span
+class="ectt-1000">--htmldir </span>occurs in the output of <span
+class="ectt-1000">configure --help</span>.
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--with-sysroot </span>must be <span
+class="ectt-1000">${ESYSROOT}</span>, if the EAPI is listed in table&#x00A0;<a
+href="#x1-128001r8">12.8<!--tex4ht:ref: tab:output-commands --></a> as
+ using it. This option will only be passed if the string <span
+class="ectt-1000">--with-sysroot </span>occurs in
+ the output of <span
+class="ectt-1000">configure --help</span>.
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--build </span>must be the value of the <span
+class="ectt-1000">CBUILD </span>environment variable. This option will
+ only be passed if <span
+class="ectt-1000">CBUILD </span>is non-empty.
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--host </span>must be the value of the <span
+class="ectt-1000">CHOST </span>environment variable.
+
+
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--target </span>must be the value of the <span
+class="ectt-1000">CTARGET </span>environment variable. This option
+ will only be passed if <span
+class="ectt-1000">CTARGET </span>is non-empty.
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--libdir </span>must be set according to algorithm&#x00A0;<a
+href="#x1-128002r2">12.2<!--tex4ht:ref: tab:output-commands --></a>.
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--disable-dependency-tracking</span>, if the EAPI is listed in table&#x00A0;<a
+href="#x1-128001r8">12.8<!--tex4ht:ref: tab:output-commands --></a> as using it.
+ This option will only be passed if the string <span
+class="ectt-1000">--disable-dependency-tracking</span>
+ occurs in the output of <span
+class="ectt-1000">configure --help</span>.
+ </li>
+ <li class="itemize"><span
+class="ectt-1000">--disable-silent-rules</span>, if the EAPI is listed in table&#x00A0;<a
+href="#x1-128001r8">12.8<!--tex4ht:ref: tab:output-commands --></a> as using it. This
+ option will only be passed if the string <span
+class="ectt-1000">--disable-silent-rules </span>occurs in the
+ output of <span
+class="ectt-1000">configure --help</span>.</li></ul>
+ <div class="table">
+ <!--l. 330--><p class="noindent" ><a
+ id="x1-128001r8"></a></p><hr class="float" /><div class="float"
+>
+ <div class="caption"
+><span class="id">Table&#x00A0;12.8: </span><span
+class="content">Extra <span
+class="ectt-1000">econf </span>arguments for EAPIs</span></div><!--tex4ht:label?: x1-128001r8 -->
+ <div class="tabular">
+ <table id="TBL-45" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-45-1g"><col
+id="TBL-45-1" /><col
+id="TBL-45-2" /><col
+id="TBL-45-3" /><col
+id="TBL-45-4" /><col
+id="TBL-45-5" /><col
+id="TBL-45-6" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-45-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-45-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:wrap; text-align:left;" id="TBL-45-1-2"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ecbx-1000">--disable-dependency-tracking</span></div> </td><td style="white-space:wrap; text-align:left;" id="TBL-45-1-3"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ecbx-1000">--disable-silent-rules</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-45-1-4"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">--docdir</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-45-1-5"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">--htmldir</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-45-1-6"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">--with-sysroot</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-45-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-45-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-2-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-2-4"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-2-5"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-2-6"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-45-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-45-3-1"
+class="td11"> 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-3-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-3-4"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-3-5"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-3-6"
+class="td11"> No </td></tr><tr
+ style="vertical-align:baseline;" id="TBL-45-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-45-4-1"
+class="td11"> 5 </td> <td style="white-space:nowrap; text-align:left;" id="TBL-45-4-2"
+class="td11"> Yes </td> <td style="white-space:nowrap; text-align:left;" id="TBL-45-4-3"
+class="td11"> Yes </td> <td style="white-space:nowrap; text-align:left;" id="TBL-45-4-4"
+class="td11"> No </td> <td style="white-space:nowrap; text-align:left;" id="TBL-45-4-5"
+class="td11"> No </td> <td style="white-space:nowrap; text-align:left;" id="TBL-45-4-6"
+class="td11"> No</td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-45-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-45-5-1"
+class="td11"> 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-5-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-5-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-5-4"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-5-5"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-45-5-6"
+class="td11"> No </td></tr><tr
+ style="vertical-align:baseline;" id="TBL-45-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-45-6-1"
+class="td11"> 7 </td> <td style="white-space:nowrap; text-align:left;" id="TBL-45-6-2"
+class="td11"> Yes </td> <td style="white-space:nowrap; text-align:left;" id="TBL-45-6-3"
+class="td11"> Yes </td> <td style="white-space:nowrap; text-align:left;" id="TBL-45-6-4"
+class="td11"> Yes </td> <td style="white-space:nowrap; text-align:left;" id="TBL-45-6-5"
+class="td11"> Yes </td> <td style="white-space:nowrap; text-align:left;" id="TBL-45-6-6"
+class="td11"> Yes</td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-45-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-45-7-1"
+class="td11"> </td></tr></table>
+ </div> </div><hr class="endfloat" />
+ </div>
+ <!--l. 350--><p class="noindent" >Note that the <span
+class="ectt-1000">${EPREFIX} </span>component represents the same offset-prefix as described in
+ table&#x00A0;<a
+href="#x1-109001r1">11.1<!--tex4ht:ref: tab:defined-vars --></a>. It facilitates offset-prefix installations which is supported by EAPIs listed in
+ table&#x00A0;<a
+href="#x1-109009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a>. When no offset-prefix installation is in effect, <span
+class="ectt-1000">EPREFIX </span>becomes the empty string,
+ making the behaviour of <span
+class="ectt-1000">econf </span>equal for both offset-prefix supporting and agnostic
+ EAPIs.
+ </p><!--l. 356--><p class="noindent" ><span
+class="ectt-1000">econf </span>must be implemented internally&#8212;that is, as a bash function and not an external
+ script. Should any portion of it fail, it must abort the build using <span
+class="ectt-1000">die</span>, unless run using
+ <span
+class="ectt-1000">nonfatal</span>, in which case it must return non-zero exit status.
+</p>
+ <div class="algorithm">
+ <!--l. 361--><p class="noindent" ><a
+ id="x1-128002r2"></a></p><hr class="float" /><div class="float"
+>
+ <div class="caption"
+><span class="id">Algorithm 12.2: </span><span
+class="content"><span
+class="ectt-1000">econf --libdir </span>logic</span></div><!--tex4ht:label?: x1-128002r2 -->
+<div class="algorithmic">
+<a
+ id="x1-128003r146"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let prefix=${EPREFIX}/usr <a
+ id="x1-128004r147"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;the caller specified --prefix=$p&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-128005r148"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let prefix=$p
+ </span><a
+ id="x1-128006r149"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-128007r150"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let libdir= <a
+ id="x1-128008r151"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;the ABI environment variable is set&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-128009r152"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let libvar=LIBDIR_$ABI <a
+ id="x1-128010r153"></a>
+ <br /><span class="ALCitem">8:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;the environment variable named by libvar is set&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-128011r154"></a>
+ <br /><span class="ALCitem">9:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> let libdir=the value of the variable named by libvar
+ </span><a
+ id="x1-128012r155"></a>
+<br /><span class="ALCitem">10:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-128013r156"></a>
+
+
+<br /><span class="ALCitem">11:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-128014r157"></a>
+<br /><span class="ALCitem">12:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;libdir is non-empty&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-128015r158"></a>
+<br /><span class="ALCitem">13:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> pass --libdir=$prefix/$libdir to configure
+ </span><a
+ id="x1-128016r159"></a>
+<br /><span class="ALCitem">14:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </div> </div><hr class="endfloat" />
+ </div>
+ </dd><dt class="description">
+<span
+class="ecbx-1000">emake</span> </dt><dd
+class="description">Calls the <span
+class="ectt-1000">$MAKE </span>program, or GNU make if the <span
+class="ectt-1000">MAKE </span>variable is unset. Any arguments given
+ are passed directly to the make command, as are the user&#8217;s chosen <span
+class="ectt-1000">MAKEOPTS</span>. Arguments
+ given to <span
+class="ectt-1000">emake </span>override user configuration. See also section&#x00A0;<a
+href="#x1-11800012.1.1">12.1.1<!--tex4ht:ref: sec:guaranteed-system-commands --></a>. <span
+class="ectt-1000">emake </span>must be an
+ external program and cannot be a function or alias&#8212;it must be callable from e. g.&#x00A0;<span
+class="ectt-1000">xargs</span>.
+ Failure behaviour is EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">einstall</span> </dt><dd
+class="description">A shortcut for the command given in listing&#x00A0;<a
+href="#x1-128017r1">12.1<!--tex4ht:ref: lst:einstall --></a>. Any arguments given to <span
+class="ectt-1000">einstall </span>are
+ passed verbatim to <span
+class="ectt-1000">emake</span>, as shown. Failure behaviour is EAPI dependent as
+ per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>. In EAPIs listed in table&#x00A0;<a
+href="#x1-122001r3">12.3<!--tex4ht:ref: tab:banned-commands-table --></a>, this command is banned as per
+ section&#x00A0;<a
+href="#x1-12200012.3.2">12.3.2<!--tex4ht:ref: sec:banned-commands --></a>.
+ <!--l. 393--><p class="noindent" >The variable <span
+class="ectt-1000">ED </span>is defined as in table&#x00A0;<a
+href="#x1-109001r1">11.1<!--tex4ht:ref: tab:defined-vars --></a> and depends on the use of an offset-prefix.
+ When such offset-prefix is absent, <span
+class="ectt-1000">ED </span>is equivalent to <span
+class="ectt-1000">D</span>. <span
+class="ectt-1000">ED </span>is always available in
+ EAPIs that support offset-prefix installations as listed in table&#x00A0;<a
+href="#x1-109009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a>, hence EAPIs
+ lacking offset-prefix support should use <span
+class="ectt-1000">D </span>instead of <span
+class="ectt-1000">ED </span>in the command given in
+ listing&#x00A0;<a
+href="#x1-128017r1">12.1<!--tex4ht:ref: lst:einstall --></a>. Variable <span
+class="ectt-1000">libdir </span>is an auxiliary local variable whose value is determined by
+ algorithm&#x00A0;<a
+href="#x1-129001r3">12.3<!--tex4ht:ref: alg:ebuild-libdir --></a>.
+ </p><!--l. 401--><p class="noindent" ><a
+ id="x1-128017r1"></a></p><hr class="float" /><div class="float"
+>
+ <div class="caption"
+><span class="id">Listing 12.1: </span><span
+class="content"><span
+class="ectt-1000">einstall </span>command</span></div><!--tex4ht:label?: x1-128017r1 -->
+
+
+<div class="verbatim" id="verbatim-17">
+emake&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;prefix="${ED}"/usr&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;datadir="${ED}"/usr/share&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;mandir="${ED}"/usr/share/man&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;infodir="${ED}"/usr/share/info&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;libdir="${ED}"/usr/${libdir}&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;localstatedir="${ED}"/var/lib&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;sysconfdir="${ED}"/etc&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;-j1&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;"$@"&#x00A0;\
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;install</div>
+ <!--l. 415--><p class="nopar" ></p></div><hr class="endfloat" />
+ </dd></dl>
+<!--l. 420--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">12.3.9 </span> <a
+ id="x1-12900012.3.9"></a>Installation commands</h4>
+<!--l. 421--><p class="nopar" >These commands are used to install files into the staging area, in cases where the package&#8217;s
+<span
+class="ectt-1000">make install </span>target cannot be used or does not install all needed files. Except where
+otherwise stated, all filenames created or modified are relative to the staging directory
+including the offset-prefix <span
+class="ectt-1000">ED </span>in offset-prefix aware EAPIs, or just the staging directory <span
+class="ectt-1000">D </span>in
+offset-prefix agnostic EAPIs. Existing destination files are overwritten. These commands
+must all be external programs and not bash functions or aliases&#8212;that is, they must be
+callable from <span
+class="ectt-1000">xargs</span>. Calling any of these commands without a filename parameter is an
+error. Ebuilds must not run any of these commands once the current phase function has
+returned.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">dobin</span> </dt><dd
+class="description">Installs the given files into <span
+class="ectt-1000">DESTTREE/bin</span>, where <span
+class="ectt-1000">DESTTREE </span>defaults to <span
+class="ectt-1000">/usr</span>. Gives
+ the files mode <span
+class="ectt-1000">0755 </span>and transfers file ownership to the superuser or its equivalent on
+ the system or installation at hand. For instance on Gentoo Linux in a non-offset-prefix
+ installation this ownership is <span
+class="ectt-1000">root:root</span>, while on an offset-prefix aware installation
+ this may be <span
+class="ectt-1000">joe:users</span>. Failure behaviour is EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">doconfd</span> </dt><dd
+class="description">Installs the given config files into <span
+class="ectt-1000">/etc/conf.d/</span>, by default with file mode <span
+class="ectt-1000">0644</span>,
+ or with the <span
+class="ectt-1000">install </span>options set by the most recent <span
+class="ectt-1000">insopts </span>call. Failure behaviour is
+ EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">dodir</span> </dt><dd
+class="description">Creates the given directories, by default with file mode <span
+class="ectt-1000">0755</span>, or with the <span
+class="ectt-1000">install</span>
+ options set by the most recent <span
+class="ectt-1000">diropts </span>call. Failure behaviour is EAPI dependent as
+ per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">dodoc</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">dodoc</span></span></span> Installs the given files into a subdirectory under <span
+class="ectt-1000">/usr/share/doc/${PF}/</span>
+ with file mode <span
+class="ectt-1000">0644</span>. The subdirectory is set by the most recent call to
+ <span
+class="ectt-1000">docinto</span>. If <span
+class="ectt-1000">docinto </span>has not yet been called, instead installs to the directory
+ <span
+class="ectt-1000">/usr/share/doc/${PF}/</span>. For EAPIs listed in table&#x00A0;<a
+href="#x1-129018r9">12.9<!--tex4ht:ref: tab:dodoc-table --></a> as supporting <span
+class="ectt-1000">-r</span>, if the first
+ argument is <span
+class="ectt-1000">-r</span>, any subsequent arguments that are directories are installed recursively
+ to the appropriate location; in any other case, it is an error for a directory to be
+ specified. Failure behaviour is EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+
+
+ </dd><dt class="description">
+<span
+class="ecbx-1000">doenvd</span> </dt><dd
+class="description">Installs the given environment files into <span
+class="ectt-1000">/etc/env.d/</span>, by default with file mode
+ <span
+class="ectt-1000">0644</span>, or with the <span
+class="ectt-1000">install </span>options set by the most recent <span
+class="ectt-1000">insopts </span>call. Failure
+ behaviour is EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">doexe</span> </dt><dd
+class="description">Installs the given files into the directory specified by the most recent <span
+class="ectt-1000">exeinto </span>call. If
+ <span
+class="ectt-1000">exeinto </span>has not yet been called, behaviour is undefined. Files are installed by default
+ with file mode <span
+class="ectt-1000">0755</span>, or with the <span
+class="ectt-1000">install </span>options set by the most recent <span
+class="ectt-1000">exeopts </span>call.
+ Failure behaviour is EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">dohard</span> </dt><dd
+class="description">Takes two parameters. Creates a hardlink from the second to the first. Both paths
+ are relative to the staging directory including the offset-prefix <span
+class="ectt-1000">ED </span>in offset-prefix aware
+ EAPIs, or just the staging directory <span
+class="ectt-1000">D </span>in offset-prefix agnostic EAPIs. In EAPIs listed
+ in table&#x00A0;<a
+href="#x1-122001r3">12.3<!--tex4ht:ref: tab:banned-commands-table --></a>, this command is banned as per section&#x00A0;<a
+href="#x1-12200012.3.2">12.3.2<!--tex4ht:ref: sec:banned-commands --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">doheader</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">doheader</span></span></span> Installs the given header files into <span
+class="ectt-1000">/usr/include/</span>, by default with
+ file mode <span
+class="ectt-1000">0644</span>, or with the <span
+class="ectt-1000">install </span>options set by the most recent <span
+class="ectt-1000">insopts </span>call.
+ If the first argument is <span
+class="ectt-1000">-r</span>, then operates recursively, descending into any directories
+ given. Only available in EAPIs listed in table&#x00A0;<a
+href="#x1-129019r10">12.10<!--tex4ht:ref: tab:doheader-table --></a> as supporting <span
+class="ectt-1000">doheader</span>. Failure
+ behaviour is EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">dohtml</span> </dt><dd
+class="description">Installs the given HTML files into a subdirectory under <span
+class="ectt-1000">/usr/share/doc/$PF/</span>. The
+ subdirectory is <span
+class="ectt-1000">html </span>by default, but this can be overridden with the <span
+class="ectt-1000">docinto </span>function. Files
+ to be installed automatically are determined by extension and the default extensions
+ are <span
+class="ectt-1000">css</span>, <span
+class="ectt-1000">gif</span>, <span
+class="ectt-1000">htm</span>, <span
+class="ectt-1000">html</span>, <span
+class="ectt-1000">jpeg</span>, <span
+class="ectt-1000">jpg</span>, <span
+class="ectt-1000">js </span>and <span
+class="ectt-1000">png</span>. These default extensions can be
+ extended or reduced (see below). The options that can be passed to <span
+class="ectt-1000">dohtml </span>are as
+ follows:
+ <dl class="compactdesc"><dt class="compactdesc">
+ <span
+class="ectt-1000">-r</span> </dt><dd
+class="compactdesc">enables recursion into directories.
+ </dd><dt class="compactdesc">
+ <span
+class="ectt-1000">-V</span> </dt><dd
+class="compactdesc">enables verbosity.
+ </dd><dt class="compactdesc">
+ <span
+class="ectt-1000">-A</span> </dt><dd
+class="compactdesc">adds file type extensions to the default list.
+ </dd><dt class="compactdesc">
+ <span
+class="ectt-1000">-a</span> </dt><dd
+class="compactdesc">sets file type extensions to only those specified.
+ </dd><dt class="compactdesc">
+ <span
+class="ectt-1000">-f</span> </dt><dd
+class="compactdesc">list of files that are able to be installed.
+ </dd><dt class="compactdesc">
+ <span
+class="ectt-1000">-x</span> </dt><dd
+class="compactdesc">list of directories that files will not be installed from (only used in conjunction with
+ <span
+class="ectt-1000">-r</span>).
+ </dd><dt class="compactdesc">
+ <span
+class="ectt-1000">-p</span> </dt><dd
+class="compactdesc">sets a document prefix for installed files, not to be confused with the global
+ offset-prefix.</dd></dl>
+ <!--l. 497--><p class="noindent" >In EAPIs listed in table&#x00A0;<a
+href="#x1-122001r3">12.3<!--tex4ht:ref: tab:banned-commands-table --></a>, this command is banned as per section&#x00A0;<a
+href="#x1-12200012.3.2">12.3.2<!--tex4ht:ref: sec:banned-commands --></a>. Failure
+ behaviour is EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </p><!--l. 501--><p class="noindent" >It is undefined whether a failure shall occur if <span
+class="ectt-1000">-r </span>is not specified and a directory is
+ encountered. Ebuilds must not rely upon any particular behaviour.
+ </p></dd><dt class="description">
+<span
+class="ecbx-1000">doinfo</span> </dt><dd
+class="description">Installs the given GNU Info files into the <span
+class="ectt-1000">/usr/share/info </span>area with file mode <span
+class="ectt-1000">0644</span>.
+ Failure behaviour is EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">doinitd</span> </dt><dd
+class="description">Installs the given initscript files into <span
+class="ectt-1000">/etc/init.d</span>, by default with file mode <span
+class="ectt-1000">0755</span>, or
+ with the <span
+class="ectt-1000">install </span>options set by the most recent <span
+class="ectt-1000">exeopts </span>call. Failure behaviour is EAPI
+ dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+
+
+ </dd><dt class="description">
+<span
+class="ecbx-1000">doins</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">doins</span></span></span> Takes one or more files as arguments and installs them into <span
+class="ectt-1000">INSDESTTREE</span>, by default
+ with file mode <span
+class="ectt-1000">0644</span>, or with the <span
+class="ectt-1000">install </span>options set by the most recent <span
+class="ectt-1000">insopts </span>call. If the
+ first argument is <span
+class="ectt-1000">-r</span>, then operates recursively, descending into any directories given. For
+ EAPIs listed in table&#x00A0;<a
+href="#x1-129020r11">12.11<!--tex4ht:ref: tab:doins-table --></a>, <span
+class="ectt-1000">doins </span>must install symlinks as symlinks; for other EAPIs,
+ behaviour is undefined if any symlink is encountered. Failure behaviour is EAPI dependent as
+ per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">dolib.a</span> </dt><dd
+class="description">For each argument, installs it into the appropriate library subdirectory under <span
+class="ectt-1000">DESTTREE</span>,
+ as determined by algorithm&#x00A0;<a
+href="#x1-129001r3">12.3<!--tex4ht:ref: alg:ebuild-libdir --></a>. Files are installed with file mode <span
+class="ectt-1000">0644</span>. Any symlinks are
+ installed into the same directory as relative links to their original target. Failure behaviour is
+ EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">dolib.so</span> </dt><dd
+class="description">As for <span
+class="ectt-1000">dolib.a </span>except each file is installed with mode <span
+class="ectt-1000">0755</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">dolib</span> </dt><dd
+class="description">As for <span
+class="ectt-1000">dolib.a </span>except that the default install mode can be overriden with the <span
+class="ectt-1000">install</span>
+ options set by the most recent <span
+class="ectt-1000">libopts </span>call. In EAPIs listed in table&#x00A0;<a
+href="#x1-122001r3">12.3<!--tex4ht:ref: tab:banned-commands-table --></a>, this command is
+ banned as per section&#x00A0;<a
+href="#x1-12200012.3.2">12.3.2<!--tex4ht:ref: sec:banned-commands --></a>.
+ <div class="algorithm">
+ <!--l. 532--><p class="noindent" ><a
+ id="x1-129001r3"></a></p><hr class="float" /><div class="float"
+>
+ <div class="caption"
+><span class="id">Algorithm 12.3: </span><span
+class="content">Determining the library directory</span></div><!--tex4ht:label?: x1-129001r3 -->
+<div class="algorithmic">
+<a
+ id="x1-129002r160"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;CONF_LIBDIR_OVERRIDE is set in the environment&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-129003r161"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> return CONF_LIBDIR_OVERRIDE
+ </span><a
+ id="x1-129004r162"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-129005r163"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;CONF_LIBDIR is set in the environment&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-129006r164"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let LIBDIR_default=CONF_LIBDIR
+ </span><a
+ id="x1-129007r165"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span><span class="else-body">
+<a
+ id="x1-129008r166"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let LIBDIR_default=&#8220;lib&#8221;
+ </span><a
+ id="x1-129009r167"></a>
+ <br /><span class="ALCitem">8:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-129010r168"></a>
+ <br /><span class="ALCitem">9:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;ABI is set in the environment&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-129011r169"></a>
+<br /><span class="ALCitem">10:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let abi=ABI
+ </span><a
+ id="x1-129012r170"></a>
+<br /><span class="ALCitem">11:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;DEFAULT_ABI is set in the environment&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-129013r171"></a>
+<br /><span class="ALCitem">12:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let abi=DEFAULT_ABI
+ </span><a
+ id="x1-129014r172"></a>
+<br /><span class="ALCitem">13:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span><span class="else-body">
+<a
+ id="x1-129015r173"></a>
+<br /><span class="ALCitem">14:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let abi=&#8220;default&#8221;
+ </span><a
+ id="x1-129016r174"></a>
+<br /><span class="ALCitem">15:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-129017r175"></a>
+<br /><span class="ALCitem">16:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> return the value of LIBDIR_$abi
+ </div> </div><hr class="endfloat" />
+ </div>
+ </dd><dt class="description">
+
+
+<span
+class="ecbx-1000">doman</span> </dt><dd
+class="description">Installs the given man pages into the appropriate subdirectory of <span
+class="ectt-1000">/usr/share/man </span>depending
+ upon its apparent section suffix (e. g.&#x00A0;<span
+class="ectt-1000">foo.1 </span>goes to <span
+class="ectt-1000">/usr/share/man/man1/foo.1</span>) with file
+ mode <span
+class="ectt-1000">0644</span>.
+ <!--l. 557--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">doman-langs</span></span></span> In EAPIs listed in table&#x00A0;<a
+href="#x1-129021r12">12.12<!--tex4ht:ref: tab:doman-table --></a> as supporting language detection by filename, a
+ man page with name of the form <span
+class="ectt-1000">foo.</span><span
+class="ecti-1000">lang</span><span
+class="ectt-1000">.1 </span>shall go to <span
+class="ectt-1000">/usr/share/man/</span><span
+class="ecti-1000">lang</span><span
+class="ectt-1000">/man1/foo.1</span>,
+ where <span
+class="ecti-1000">lang </span>refers to a pair of lower-case ASCII letters optionally followed by an underscore
+ and a pair of upper-case ASCII letters. Failure behaviour is EAPI dependent as per
+ section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </p><!--l. 563--><p class="noindent" >With option <span
+class="ectt-1000">-i18n=</span><span
+class="ecti-1000">lang</span>, a man page shall be installed into an appropriate subdirectory of
+ <span
+class="ectt-1000">/usr/share/man/</span><span
+class="ecti-1000">lang </span>(e. g.&#x00A0;<span
+class="ectt-1000">/usr/share/man/</span><span
+class="ecti-1000">lang</span><span
+class="ectt-1000">/man1/foo.pl.1 </span>would be the destination
+ for <span
+class="ectt-1000">foo.pl.1</span>). The <span
+class="ecti-1000">lang </span>subdirectory level is skipped if <span
+class="ecti-1000">lang </span>is the empty string. In EAPIs
+ specified by table&#x00A0;<a
+href="#x1-129021r12">12.12<!--tex4ht:ref: tab:doman-table --></a>, the <span
+class="ectt-1000">-i18n </span>option takes precedence over the language code in the
+ filename.
+ </p></dd><dt class="description">
+<span
+class="ecbx-1000">domo</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">domo-path</span></span></span> Installs the given <span
+class="ectt-1000">.mo </span>files with file mode <span
+class="ectt-1000">0644 </span>into the appropriate
+ subdirectory of the locale tree, generated by taking the basename of the file, removing the <span
+class="ectt-1000">.*</span>
+ suffix, and appending <span
+class="ectt-1000">/LC_MESSAGES</span>. The name of the installed files is the package name
+ with <span
+class="ectt-1000">.mo </span>appended. Failure behaviour is EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>. The locale
+ tree location is EAPI dependent as per table&#x00A0;<a
+href="#x1-129023r14">12.14<!--tex4ht:ref: tab:domo-path --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">dosbin</span> </dt><dd
+class="description">As <span
+class="ectt-1000">dobin</span>, but installs to <span
+class="ectt-1000">DESTTREE/sbin</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">dosym</span> </dt><dd
+class="description">Creates a symbolic link named as for its second parameter, pointing to the first. If the
+ directory containing the new link does not exist, creates it. Failure behaviour is EAPI
+ dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">fowners</span> </dt><dd
+class="description">Acts as for <span
+class="ectt-1000">chown</span>, but takes paths relative to the image directory. Failure behaviour is
+ EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">fperms</span> </dt><dd
+class="description">Acts as for <span
+class="ectt-1000">chmod</span>, but takes paths relative to the image directory. Failure behaviour is
+ EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">keepdir</span> </dt><dd
+class="description">For each argument, creates a directory as for <span
+class="ectt-1000">dodir</span>, and an empty file whose name starts
+ with <span
+class="ectt-1000">.keep </span>in that directory to ensure that the directory does not get removed by the
+ package manager should it be empty at any point. Failure behaviour is EAPI dependent as
+ per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newbin</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">newfoo-stdin</span></span></span> As for <span
+class="ectt-1000">dobin</span>, but takes two parameters. The first is the file to install; the
+ second is the new filename under which it will be installed. In EAPIs specified by
+ table&#x00A0;<a
+href="#x1-129022r13">12.13<!--tex4ht:ref: tab:newfoo-stdin-table --></a>, standard input is read when the first parameter is <span
+class="ectt-1000">- </span>(a hyphen). In this case, it
+ is an error if standard input is a terminal.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newconfd</span> </dt><dd
+class="description">As for <span
+class="ectt-1000">doconfd</span>, but takes two parameters as for <span
+class="ectt-1000">newbin</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newdoc</span> </dt><dd
+class="description">As above, for <span
+class="ectt-1000">dodoc</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newenvd</span> </dt><dd
+class="description">As above, for <span
+class="ectt-1000">doenvd</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newexe</span> </dt><dd
+class="description">As above, for <span
+class="ectt-1000">doexe</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newheader</span> </dt><dd
+class="description">As above, for <span
+class="ectt-1000">doheader</span>.
+
+
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newinitd</span> </dt><dd
+class="description">As above, for <span
+class="ectt-1000">doinitd</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newins</span> </dt><dd
+class="description">As above, for <span
+class="ectt-1000">doins</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newlib.a</span> </dt><dd
+class="description">As above, for <span
+class="ectt-1000">dolib.a</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newlib.so</span> </dt><dd
+class="description">As above, for <span
+class="ectt-1000">dolib.so</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newman</span> </dt><dd
+class="description">As above, for <span
+class="ectt-1000">doman</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">newsbin</span> </dt><dd
+class="description">As above, for <span
+class="ectt-1000">dosbin</span>.
+ </dd></dl>
+<div class="table">
+
+
+<!--l. 623--><p class="noindent" ><a
+ id="x1-129018r9"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.9: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">dodoc -r</span></span></div><!--tex4ht:label?: x1-129018r9 -->
+<div class="tabular">
+ <table id="TBL-46" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-46-1g"><col
+id="TBL-46-1" /><col
+id="TBL-46-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-46-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-46-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-46-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">dodoc -r</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-46-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-46-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-46-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-46-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-46-3-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-46-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-46-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-46-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 637--><p class="noindent" ><a
+ id="x1-129019r10"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.10: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">doheader </span>and <span
+class="ectt-1000">newheader</span></span></div><!--tex4ht:label?: x1-129019r10 -->
+<div class="tabular">
+ <table id="TBL-47" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-47-1g"><col
+id="TBL-47-1" /><col
+id="TBL-47-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-47-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-47-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-47-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports </span><span
+class="ectt-1000">doheader </span><span
+class="ecbx-1000">and </span><span
+class="ectt-1000">newheader</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-47-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-47-2-1"
+class="td11"> 0, 1, 2, 3, 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-47-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-47-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-47-3-1"
+class="td11"> 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-47-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-47-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-47-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 651--><p class="noindent" ><a
+ id="x1-129020r11"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.11: </span><span
+class="content">EAPIs supporting symlinks for <span
+class="ectt-1000">doins</span></span></div><!--tex4ht:label?: x1-129020r11 -->
+<div class="tabular">
+ <table id="TBL-48" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-48-1g"><col
+id="TBL-48-1" /><col
+id="TBL-48-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-48-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-48-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-48-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">doins </span><span
+class="ecbx-1000">supports symlinks?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-48-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-48-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-48-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-48-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-48-3-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-48-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-48-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-48-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 665--><p class="noindent" ><a
+ id="x1-129021r12"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.12: </span><span
+class="content"><span
+class="ectt-1000">doman </span>language support options for EAPIs</span></div><!--tex4ht:label?: x1-129021r12 -->
+<div class="tabular">
+ <table id="TBL-49" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-49-1g"><col
+id="TBL-49-1" /><col
+id="TBL-49-2" /><col
+id="TBL-49-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-49-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-49-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-49-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Language detection by filename?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-49-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Option </span><span
+class="ectt-1000">-i18n </span><span
+class="ecbx-1000">takes precedence?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-49-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-49-2-1"
+class="td11"> 0, 1 </td><td style="white-space:nowrap; text-align:left;" id="TBL-49-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-49-2-3"
+class="td11"> Not applicable </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-49-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-49-3-1"
+class="td11"> 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-49-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-49-3-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-49-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-49-4-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-49-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-49-4-3"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-49-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-49-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 681--><p class="noindent" ><a
+ id="x1-129022r13"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.13: </span><span
+class="content">EAPIs supporting stdin for <span
+class="ectt-1000">new* </span>commands</span></div><!--tex4ht:label?: x1-129022r13 -->
+<div class="tabular">
+ <table id="TBL-50" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-50-1g"><col
+id="TBL-50-1" /><col
+id="TBL-50-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-50-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-50-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-50-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">new* </span><span
+class="ecbx-1000">can read from stdin?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-50-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-50-2-1"
+class="td11"> 0, 1, 2, 3, 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-50-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-50-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-50-3-1"
+class="td11"> 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-50-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-50-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-50-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 695--><p class="noindent" ><a
+ id="x1-129023r14"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.14: </span><span
+class="content"><span
+class="ectt-1000">domo </span>destination path in EAPIs</span></div><!--tex4ht:label?: x1-129023r14 -->
+<div class="tabular">
+ <table id="TBL-51" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-51-1g"><col
+id="TBL-51-1" /><col
+id="TBL-51-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-51-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-51-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-51-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Destination path</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-51-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-51-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-51-2-2"
+class="td11"> <span
+class="ectt-1000">${DESTTREE}/share/locale </span></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-51-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-51-3-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-51-3-2"
+class="td11"> <span
+class="ectt-1000">/usr/share/locale </span></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-51-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-51-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.10 </span> <a
+ id="x1-13000012.3.10"></a>Commands affecting install destinations</h4>
+<!--l. 709--><p class="nopar" >The following commands are used to set the various destination trees, all relative to <span
+class="ectt-1000">${ED} </span>in
+offset-prefix aware EAPIs and relative to <span
+class="ectt-1000">${D} </span>in offset-prefix agnostic EAPIs, used by the above
+installation commands. They must be shell functions or aliases, due to the need to set variables
+read by the above commands. Ebuilds must not run any of these commands once the current phase
+function has returned.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">into</span> </dt><dd
+class="description">Sets the value of <span
+class="ectt-1000">DESTTREE </span>for future invocations of the above utilities. Creates the
+ directory under <span
+class="ectt-1000">${ED} </span>in offset-prefix aware EAPIs or under <span
+class="ectt-1000">${D} </span>in offset-prefix
+ agnostic EAPIs, using <span
+class="ectt-1000">install -d </span>with no additional options, if it does not already
+ exist. Failure behaviour is EAPI dependent as per section&#x00A0;<a
+href="#x1-12100012.3.1">12.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">insinto</span> </dt><dd
+class="description">Sets the value of <span
+class="ectt-1000">INSDESTTREE </span>for future invocations of the above utilities. May
+ create the directory, as specified for <span
+class="ectt-1000">into</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">exeinto</span> </dt><dd
+class="description">Sets the install path for <span
+class="ectt-1000">doexe </span>and <span
+class="ectt-1000">newexe</span>. May create the directory, as specified
+ for <span
+class="ectt-1000">into</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">docinto</span> </dt><dd
+class="description">Sets the install subdirectory for <span
+class="ectt-1000">dodoc </span>et al. May create the directory, as specified
+ for <span
+class="ectt-1000">into</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">insopts</span> </dt><dd
+class="description">Sets the options passed by <span
+class="ectt-1000">doins </span>et al.&#x00A0;to the <span
+class="ectt-1000">install </span>command.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">diropts</span> </dt><dd
+class="description">Sets the options passed by <span
+class="ectt-1000">dodir </span>et al.&#x00A0;to the <span
+class="ectt-1000">install </span>command.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">exeopts</span> </dt><dd
+class="description">Sets the options passed by <span
+class="ectt-1000">doexe </span>et al.&#x00A0;to the <span
+class="ectt-1000">install </span>command.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">libopts</span> </dt><dd
+class="description">Sets the options passed by <span
+class="ectt-1000">dolib </span>et al.&#x00A0;to the <span
+class="ectt-1000">install </span>command. In EAPIs listed
+ in table&#x00A0;<a
+href="#x1-122001r3">12.3<!--tex4ht:ref: tab:banned-commands-table --></a>, this command is banned as per section&#x00A0;<a
+href="#x1-12200012.3.2">12.3.2<!--tex4ht:ref: sec:banned-commands --></a>.
+ </dd></dl>
+<!--l. 745--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">12.3.11 </span> <a
+ id="x1-13100012.3.11"></a>Commands controlling manipulation of files in the staging area</h4>
+<!--l. 746--><p class="nopar" >These commands are used to control optional manipulations that the package manager may
+perform on files in the staging directory <span
+class="ectt-1000">ED</span>, like compressing files or stripping symbols from object
+files.
+</p><!--l. 750--><p class="noindent" >For each of the operations mentioned below, the package manager shall maintain an inclusion list
+and an exclusion list, in order to control which directories and files the operation may or may not
+be performed upon. The initial contents of the two lists is specified below for each of the
+commands, respectively.
+
+
+</p><!--l. 755--><p class="noindent" >Any of these operations shall be carried out after <span
+class="ectt-1000">src_install </span>has completed, and before the
+execution of any subsequent phase function. For each item in the inclusion list, pretend it has the
+value of the <span
+class="ectt-1000">ED </span>variable prepended, then:
+</p><!--l. 760--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">If it is a directory, act as if every file or directory immediately under this directory
+ were in the inclusion list.
+ </li>
+ <li class="compactitem">If the item is a file, the operation may be performed on it, unless it has been excluded
+ as described below.
+ </li>
+ <li class="compactitem">If the item does not exist, it is ignored.</li></ul>
+<!--l. 767--><p class="noindent" >Whether an item is to be excluded is determined as follows: For each item in the exclusion list,
+pretend it has the value of the <span
+class="ectt-1000">ED </span>variable prepended, then:
+</p><!--l. 771--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">If it is a directory, act as if every file or directory immediately under this directory
+ were in the exclusion list.
+ </li>
+ <li class="compactitem">If the item is a file, the operation shall not be performed on it.
+ </li>
+ <li class="compactitem">If the item does not exist, it is ignored.</li></ul>
+<!--l. 777--><p class="noindent" >The package manager shall take appropriate steps to ensure that any operations that it performs
+on files in the staging area behave sensibly even if an item is listed in the inclusion list multiple
+times or if an item is a symlink.
+</p><!--l. 781--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">docompress</span></span></span> In EAPIs listed in table&#x00A0;<a
+href="#x1-131001r15">12.15<!--tex4ht:ref: tab:staging-area-commands --></a> as supporting controllable compression, the
+package manager may optionally compress a subset of the files under the <span
+class="ectt-1000">ED </span>directory. The
+package manager shall ensure that its compression mechanisms behave sensibly even if a
+file is already compressed. For compression, the initial values of the two lists are as
+follows:
+</p><!--l. 788--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">The inclusion list contains <span
+class="ectt-1000">/usr/share/doc</span>, <span
+class="ectt-1000">/usr/share/info </span>and <span
+class="ectt-1000">/usr/share/man</span>.
+ </li>
+ <li class="compactitem">The exclusion list contains <span
+class="ectt-1000">/usr/share/doc/${PF}/html</span>.</li></ul>
+<!--l. 792--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">dostrip</span></span></span> In EAPIs listed in table&#x00A0;<a
+href="#x1-131001r15">12.15<!--tex4ht:ref: tab:staging-area-commands --></a> as supporting controllable stripping of symbols, the
+package manager may strip a subset of the files under the <span
+class="ectt-1000">ED </span>directory. For stripping of symbols,
+the initial values of the two lists are as follows:
+</p><!--l. 797--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">If the <span
+class="ectt-1000">RESTRICT </span>variable described in section&#x00A0;<a
+href="#x1-810008.2.8">8.2.8<!--tex4ht:ref: tab:staging-area-commands --></a> enables a <span
+class="ectt-1000">strip </span>token, the inclusion
+ list is empty; otherwise it contains <span
+class="ectt-1000">/ </span>(the root path).
+ </li>
+ <li class="compactitem">The exclusion list is empty.</li></ul>
+<!--l. 802--><p class="noindent" >The following commands may be used in <span
+class="ectt-1000">src_install </span>to alter these lists. It is an error to call any
+of these functions from any other phase.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">docompress</span> </dt><dd
+class="description">If the first argument is <span
+class="ectt-1000">-x</span>, add each of its subsequent arguments to the
+ exclusion list for compression. Otherwise, add each argument to the respective inclusion
+ list. Only available in EAPIs listed in table&#x00A0;<a
+href="#x1-131001r15">12.15<!--tex4ht:ref: tab:staging-area-commands --></a> as supporting <span
+class="ectt-1000">docompress</span>.
+
+
+ </dd><dt class="description">
+<span
+class="ecbx-1000">dostrip</span> </dt><dd
+class="description">If the first argument is <span
+class="ectt-1000">-x</span>, add each of its subsequent arguments to the exclusion
+ list for stripping of symbols. Otherwise, add each argument to the respective inclusion
+ list. Only available in EAPIs listed in table&#x00A0;<a
+href="#x1-131001r15">12.15<!--tex4ht:ref: tab:staging-area-commands --></a> as supporting <span
+class="ectt-1000">dostrip</span>.</dd></dl>
+<div class="table">
+
+
+<!--l. 818--><p class="noindent" ><a
+ id="x1-131001r15"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.15: </span><span
+class="content">Commands controlling manipulation of files in the staging area in EAPIs</span></div><!--tex4ht:label?: x1-131001r15 -->
+<div class="tabular">
+ <table id="TBL-52" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-52-1g"><col
+id="TBL-52-1" /><col
+id="TBL-52-2" /><col
+id="TBL-52-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-52-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-52-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:wrap; text-align:left;" id="TBL-52-1-2"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ecbx-1000">Supports</span>
+ <span
+class="ecbx-1000">controllable</span>
+ <span
+class="ecbx-1000">compression</span>
+ <span
+class="ecbx-1000">and</span>
+ <span
+class="ectt-1000">docompress</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:wrap; text-align:left;" id="TBL-52-1-3"
+class="td11"> <div class="multicolumn" style="white-space:wrap; text-align:left;"><span
+class="ecbx-1000">Supports</span>
+ <span
+class="ecbx-1000">controllable</span>
+ <span
+class="ecbx-1000">stripping</span>
+ <span
+class="ecbx-1000">and</span>
+ <span
+class="ectt-1000">dostrip</span><span
+class="ecbx-1000">?</span></div>
+
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-52-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-52-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-52-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-52-2-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-52-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-52-3-1"
+class="td11"> 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-52-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-52-3-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-52-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-52-4-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-52-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-52-4-3"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-52-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-52-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.12 </span> <a
+ id="x1-13200012.3.12"></a>USE list functions</h4>
+<!--l. 834--><p class="nopar" >These functions provide behaviour based upon set or unset use flags. Ebuilds must not run any of
+these commands once the current phase function has returned. It is an error if an ebuild calls any
+of these functions in global scope.
+</p><!--l. 838--><p class="noindent" >Unless otherwise noted, if any of these functions is called with a flag value that is not
+included in <span
+class="ectt-1000">IUSE_EFFECTIVE</span>, either behaviour is undefined or it is an error as decided by
+table&#x00A0;<a
+href="#x1-132001r16">12.16<!--tex4ht:ref: tab:use-list-strictness --></a>.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">use</span> </dt><dd
+class="description">Returns shell true (0) if the first argument (a <span
+class="ectt-1000">USE </span>flag name) is enabled, false otherwise.
+ If the flag name is prefixed with <span
+class="ectt-1000">!</span>, returns true if the flag is disabled, and false if it is
+ enabled. It is guaranteed that this command is quiet.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">usev</span> </dt><dd
+class="description">The same as <span
+class="ectt-1000">use</span>, but also prints the flag name if the condition is met.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">useq</span> </dt><dd
+class="description">Deprecated synonym for <span
+class="ectt-1000">use</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">use_with</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">use-with</span></span></span> Has one-, two-, and three-argument forms. The first argument is a
+ USE flag name, the second a <span
+class="ectt-1000">configure </span>option name (<span
+class="ectt-1000">${opt}</span>), defaulting to the same
+ as the first argument if not provided, and the third is a string value (<span
+class="ectt-1000">${value}</span>). For
+ EAPIs listed in table&#x00A0;<a
+href="#x1-132002r17">12.17<!--tex4ht:ref: tab:use-with-third-arg --></a> as not supporting it, an empty third argument is treated
+ as if it weren&#8217;t provided. If the USE flag is set, outputs <span
+class="ectt-1000">--with-${opt}=${value} </span>if
+ the third argument was provided, and <span
+class="ectt-1000">--with-${opt} </span>otherwise. If the flag is not set,
+ then it outputs <span
+class="ectt-1000">--without-${opt}</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">use_enable</span> </dt><dd
+class="description">Works the same as <span
+class="ectt-1000">use_with()</span>, but outputs <span
+class="ectt-1000">--enable- </span>or <span
+class="ectt-1000">--disable-</span>
+ instead of <span
+class="ectt-1000">--with- </span>or <span
+class="ectt-1000">--without-</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">usex</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">usex</span></span></span> Accepts at least one and at most five arguments. The first argument is a USE
+ flag name, any subsequent arguments (<span
+class="ectt-1000">${arg2} </span>to <span
+class="ectt-1000">${arg5}</span>) are string values. If not
+ provided, <span
+class="ectt-1000">${arg2} </span>and <span
+class="ectt-1000">${arg3} </span>default to <span
+class="ectt-1000">yes </span>and <span
+class="ectt-1000">no</span>, respectively; <span
+class="ectt-1000">${arg4} </span>and
+ <span
+class="ectt-1000">${arg5} </span>default to the empty string. If the USE flag is set, outputs <span
+class="ectt-1000">${arg2}${arg4}</span>.
+ Otherwise, outputs <span
+class="ectt-1000">${arg3}${arg5}</span>. The condition is inverted if the flag name is
+ prefixed with&#x00A0;<span
+class="ectt-1000">!</span>. Only available in EAPIs listed in table&#x00A0;<a
+href="#x1-132003r18">12.18<!--tex4ht:ref: tab:use-list-functions --></a> as supporting <span
+class="ectt-1000">usex</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">in_iuse</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">in-iuse</span></span></span> Returns shell true (0) if the first argument (a <span
+class="ectt-1000">USE </span>flag name) is included
+ in <span
+class="ectt-1000">IUSE_EFFECTIVE</span>, false otherwise. Only available in EAPIs listed in table&#x00A0;<a
+href="#x1-132003r18">12.18<!--tex4ht:ref: tab:use-list-functions --></a> as
+ supporting <span
+class="ectt-1000">in_iuse</span>.</dd></dl>
+<div class="table">
+
+
+<!--l. 872--><p class="noindent" ><a
+ id="x1-132001r16"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.16: </span><span
+class="content">EAPI behaviour for use queries not in <span
+class="ectt-1000">IUSE_EFFECTIVE</span></span></div><!--tex4ht:label?: x1-132001r16 -->
+<div class="tabular">
+ <table id="TBL-53" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-53-1g"><col
+id="TBL-53-1" /><col
+id="TBL-53-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-53-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-53-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-53-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Behaviour</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-53-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-53-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-53-2-2"
+class="td11"> Undefined </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-53-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-53-3-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-53-3-2"
+class="td11"> Error </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-53-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-53-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 886--><p class="noindent" ><a
+ id="x1-132002r17"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.17: </span><span
+class="content">EAPIs supporting empty third argument in <span
+class="ectt-1000">use_with </span>and <span
+class="ectt-1000">use_enable</span></span></div><!--tex4ht:label?: x1-132002r17 -->
+<div class="tabular">
+ <table id="TBL-54" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-54-1g"><col
+id="TBL-54-1" /><col
+id="TBL-54-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-54-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-54-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-54-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports empty third argument?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-54-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-54-2-1"
+class="td11"> 0, 1, 2, 3 </td><td style="white-space:nowrap; text-align:left;" id="TBL-54-2-2"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-54-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-54-3-1"
+class="td11"> 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-54-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-54-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-54-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<div class="table">
+
+
+<!--l. 900--><p class="noindent" ><a
+ id="x1-132003r18"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.18: </span><span
+class="content">EAPIs supporting <span
+class="ectt-1000">usex </span>and <span
+class="ectt-1000">in_iuse</span></span></div><!--tex4ht:label?: x1-132003r18 -->
+<div class="tabular">
+ <table id="TBL-55" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-55-1g"><col
+id="TBL-55-1" /><col
+id="TBL-55-2" /><col
+id="TBL-55-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-55-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-55-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-55-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">usex</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-55-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">in_iuse</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-55-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-55-2-1"
+class="td11"> 0, 1, 2, 3, 4 </td><td style="white-space:nowrap; text-align:left;" id="TBL-55-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-55-2-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-55-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-55-3-1"
+class="td11"> 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-55-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-55-3-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-55-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-55-4-1"
+class="td11"> 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-55-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-55-4-3"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-55-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-55-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.13 </span> <a
+ id="x1-13300012.3.13"></a>Text list functions</h4>
+<!--l. 916--><p class="nopar" >These functions check whitespace-separated lists for a particular value.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">has</span> </dt><dd
+class="description">Returns shell true (0) if the first argument (a word) is found in the list of subsequent
+ arguments, false otherwise. Guaranteed quiet.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">hasv</span> </dt><dd
+class="description">The same as <span
+class="ectt-1000">has</span>, but also prints the first argument if found.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">hasq</span> </dt><dd
+class="description">Deprecated synonym for <span
+class="ectt-1000">has</span>.</dd></dl>
+<!--l. 925--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">12.3.14 </span> <a
+ id="x1-13400012.3.14"></a>Version manipulation and comparison commands</h4>
+<!--l. 926--><p class="nopar" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">ver-commands</span></span></span> These commands provide utilities for working with version strings. Their
+availability per EAPI is listed in table&#x00A0;<a
+href="#x1-134001r19">12.19<!--tex4ht:ref: tab:version-commands --></a>.
+</p><!--l. 930--><p class="noindent" >For the purpose of version manipulation commands, the specification provides a method for
+splitting an arbitrary version string (not necessarily conforming to section&#x00A0;<a
+href="#x1-250003.2">3.2<!--tex4ht:ref: sec:version-spec --></a>) into a series of
+version components and version separators.
+</p><!--l. 934--><p class="noindent" >A version component consists either purely of digits (<span
+class="ectt-1000">[0-9]+</span>) or purely of uppercase and
+lowercase ASCII letters (<span
+class="ectt-1000">[A-Za-z]+</span>). A version separator is either a string of any other
+characters (<span
+class="ectt-1000">[^A-Za-z0-9]</span>) or it occurs at the transition between a sequence of digits and a
+sequence of letters, or vice versa. In the latter case, the version separator is an empty
+string.
+</p><!--l. 940--><p class="noindent" >The version string is processed left-to-right, with the successive version components being assigned
+successive indices starting with 1. The separator following a version component is assigned the
+index of the preceding version component. If the first version component is preceded by a
+non-empty string of version separator characters, this separator is assigned the index
+0.
+</p><!--l. 945--><p class="noindent" >The version components are presumed present if not empty. The version separators between
+version components are always presumed present, even if they are empty. The version separators
+preceding the first version component and following the last are only presumed present if they are
+not empty.
+</p><!--l. 949--><p class="noindent" >Whenever the commands support ranges, the range is specified as an unsigned integer, optionally
+followed by a hyphen (<span
+class="ectt-1000">-</span>), which in turn is optionally followed by another unsigned
+integer.
+</p><!--l. 952--><p class="noindent" >A single integer specifies a single component or separator index. An integer followed by a hyphen
+specifies all components or separators starting with the one at the specified index. Two integers
+separated by a hyphen specify a range of versions starting at the index specified by the first and
+ending at the second, inclusively.
+
+
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">ver_cut</span> </dt><dd
+class="description">Takes a range as the first argument, and optionally a version string as the second.
+ Prints a substring of the version string starting at the version component specified as
+ start of the range and ending at the version component specified as end of the range.
+ If the version string is not specified, <span
+class="ectt-1000">${PVR} </span>is used.
+ <!--l. 963--><p class="noindent" >If the range spans outside the present version components, the missing components
+ and separators are presumed empty. In particular, the range starting at zero includes
+ the zeroth version separator if present, and the range spanning past the last version
+ component includes the suffix following it if present. A range that does not intersect
+ with any present version components yields an empty string.
+ </p></dd><dt class="description">
+<span
+class="ecbx-1000">ver_rs</span> </dt><dd
+class="description">Takes one or more pairs of arguments, optionally followed by a version string. Every
+ argument pair specifies a range and a replacement string. Prints a version string after
+ performing the specified separator substitutions. If the version string is not specified,
+ <span
+class="ectt-1000">${PVR} </span>is used.
+ <!--l. 974--><p class="noindent" >For every argument pair specified, each of the version separators present at indices
+ specified by the range is replaced with the replacement string, in order. If the range
+ spans outside the range of present version separators, it is silently truncated.
+ </p></dd><dt class="description">
+<span
+class="ecbx-1000">ver_test</span> </dt><dd
+class="description">Takes two or three arguments. In the 3-argument form, takes an LHS version
+ string, followed by an operator, followed by an RHS version string. In the 2-argument
+ form, the first version string is omitted and <span
+class="ectt-1000">${PVR} </span>is used as LHS version string. The
+ operator can be <span
+class="ectt-1000">-eq </span>(equal to), <span
+class="ectt-1000">-ne </span>(not equal to), <span
+class="ectt-1000">-gt </span>(greater than), <span
+class="ectt-1000">-ge </span>(greater
+ than or equal to), <span
+class="ectt-1000">-lt </span>(less than) or <span
+class="ectt-1000">-le </span>(less than or equal to). Returns shell true (0)
+ if the specified relation between the LHS and RHS version strings is fulfilled.
+ <!--l. 985--><p class="noindent" >Both version strings must conform to the version specification in section&#x00A0;<a
+href="#x1-250003.2">3.2<!--tex4ht:ref: sec:version-spec --></a>.
+ Comparison is done using algorithm&#x00A0;<a
+href="#x1-26001r1">3.1<!--tex4ht:ref: sec:version-spec --></a>.</p></dd></dl>
+<div class="table">
+
+
+<!--l. 990--><p class="noindent" ><a
+ id="x1-134001r19"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.19: </span><span
+class="content">EAPIs supporting version manipulation commands</span></div><!--tex4ht:label?: x1-134001r19 -->
+<div class="tabular">
+ <table id="TBL-56" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-56-1g"><col
+id="TBL-56-1" /><col
+id="TBL-56-2" /><col
+id="TBL-56-3" /><col
+id="TBL-56-4" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-56-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-56-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-56-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">ver_cut</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-56-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">ver_rs</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-56-1-4"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">ver_test</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-56-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-56-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5, 6 </td><td style="white-space:nowrap; text-align:left;" id="TBL-56-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-56-2-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-56-2-4"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-56-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-56-3-1"
+class="td11"> 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-56-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-56-3-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-56-3-4"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-56-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-56-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.15 </span> <a
+ id="x1-13500012.3.15"></a>Misc commands</h4>
+<!--l. 1006--><p class="nopar" >The following commands are always available in the ebuild environment, but don&#8217;t really fit in any
+of the above categories. Ebuilds must not run any of these commands once the current phase
+function has returned.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">dosed</span> </dt><dd
+class="description">Takes any number of arguments, which can be files or <span
+class="ectt-1000">sed </span>expressions. For each
+ argument, if it names, relative to <span
+class="ectt-1000">ED </span>(offset-prefix aware EAPIs) or <span
+class="ectt-1000">D </span>(offset-prefix
+ agnostic EAPIs) a file which exists, then <span
+class="ectt-1000">sed </span>is run with the current expression on that
+ file. Otherwise, the current expression is set to the text of the argument. The initial
+ value of the expression is <span
+class="ectt-1000">s:${ED}::g </span>in offset-prefix aware EAPIs and <span
+class="ectt-1000">s:${D}::g </span>in
+ offset-prefix agnostic EAPIs. In EAPIs listed in table&#x00A0;<a
+href="#x1-122001r3">12.3<!--tex4ht:ref: tab:banned-commands-table --></a>, this command is banned
+ as per section&#x00A0;<a
+href="#x1-12200012.3.2">12.3.2<!--tex4ht:ref: sec:banned-commands --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">unpack</span> </dt><dd
+class="description">Unpacks one or more source archives, in order, into the current directory. For
+ compressed files, creates the target file in the current directory, with the compression
+ suffix removed from its name. After unpacking, must ensure that all filesystem objects
+ inside the current working directory (but not the current working directory itself) have
+ permissions <span
+class="ectt-1000">a+r,u+w,go-w </span>and that all directories under the current working directory
+ additionally have permissions <span
+class="ectt-1000">a+x</span>.
+ <!--l. 1026--><p class="noindent" >Arguments to <span
+class="ectt-1000">unpack </span>are interpreted as follows:
+ </p><ul>
+ <li class="compactitem">A filename without path (i. e., not containing any slash) is looked up in <span
+class="ectt-1000">DISTDIR</span>.
+ </li>
+ <li class="compactitem">An argument starting with the string <span
+class="ectt-1000">./ </span>is a path relative to the working directory.
+ </li>
+ <li class="compactitem"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">unpack-absolute</span></span></span> Otherwise, for EAPIs listed in table&#x00A0;<a
+href="#x1-135001r20">12.20<!--tex4ht:ref: tab:unpack-behaviour --></a> as supporting
+ absolute and relative paths, the argument is interpreted as a literal path (absolute,
+ or relative to the working directory); for EAPIs listed as <span
+class="ecti-1000">not </span>supporting such
+ paths, <span
+class="ectt-1000">unpack </span>shall abort the build process.</li></ul>
+ <!--l. 1036--><p class="noindent" >Any unrecognised file format shall be skipped silently. If unpacking a supported file format
+ fails, <span
+class="ectt-1000">unpack </span>shall abort the build process.
+ </p><!--l. 1039--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">unpack-extensions</span></span></span> Must be able to unpack the following file formats, if the relevant
+ binaries are available: </p>
+ <ul class="itemize1">
+ <li class="itemize">tar files (<span
+class="ectt-1000">*.tar</span>). Ebuilds must ensure that GNU tar is installed.
+ </li>
+ <li class="itemize">gzip-compressed files (<span
+class="ectt-1000">*.gz, *.Z</span>). Ebuilds must ensure that GNU gzip is
+ installed.
+ </li>
+ <li class="itemize">gzip-compressed tar files (<span
+class="ectt-1000">*.tar.gz, *.tgz, *.tar.Z</span>). Ebuilds must ensure that
+ GNU gzip and GNU tar are installed.
+ </li>
+ <li class="itemize">bzip2-compressed files (<span
+class="ectt-1000">*.bz2, *.bz</span>). Ebuilds must ensure that bzip2 is installed.
+
+
+ </li>
+ <li class="itemize">bzip2-compressed tar files (<span
+class="ectt-1000">*.tar.bz2, *.tbz2, *.tar.bz, *.tbz</span>). Ebuilds
+ must ensure that bzip2 and GNU tar are installed.
+ </li>
+ <li class="itemize">zip files (<span
+class="ectt-1000">*.zip, *.ZIP, *.jar</span>). Ebuilds must ensure that Info-ZIP Unzip is
+ installed.
+ </li>
+ <li class="itemize">7zip files (<span
+class="ectt-1000">*.7z, *.7Z</span>). Ebuilds must ensure that P7ZIP is installed.
+ </li>
+ <li class="itemize">rar files (<span
+class="ectt-1000">*.rar, *.RAR</span>). Ebuilds must ensure that RARLAB&#8217;s unrar is installed.
+ </li>
+ <li class="itemize">LHA archives (<span
+class="ectt-1000">*.LHA, *.LHa, *.lha, *.lzh</span>). Ebuilds must ensure that the lha
+ program is installed.
+ </li>
+ <li class="itemize">ar archives (<span
+class="ectt-1000">*.a</span>). Ebuilds must ensure that GNU binutils is installed.
+ </li>
+ <li class="itemize">deb packages (<span
+class="ectt-1000">*.deb</span>). Ebuilds must ensure that the deb2targz program is installed
+ on those platforms where the GNU binutils ar program is not available and the
+ installed ar program is incompatible with GNU archives. Otherwise, ebuilds must
+ ensure that GNU binutils is installed.
+ </li>
+ <li class="itemize">lzma-compressed files (<span
+class="ectt-1000">*.lzma</span>). Ebuilds must ensure that XZ Utils is installed.
+ </li>
+ <li class="itemize">lzma-compressed tar files (<span
+class="ectt-1000">*.tar.lzma</span>). Ebuilds must ensure that XZ Utils and
+ GNU tar are installed.
+ </li>
+ <li class="itemize">xz-compressed files (<span
+class="ectt-1000">*.xz</span>). Ebuilds must ensure that XZ Utils is installed. Only
+ for EAPIs listed in table&#x00A0;<a
+href="#x1-135002r21">12.21<!--tex4ht:ref: sec:banned-commands --></a> as supporting <span
+class="ectt-1000">.xz</span>.
+ </li>
+ <li class="itemize">xz-compressed tar files (<span
+class="ectt-1000">*.tar.xz, *.txz</span>). Ebuilds must ensure that XZ Utils
+ and GNU tar are installed. Only for EAPIs listed in table&#x00A0;<a
+href="#x1-135002r21">12.21<!--tex4ht:ref: sec:banned-commands --></a> as supporting
+ <span
+class="ectt-1000">.tar.xz </span>or <span
+class="ectt-1000">.txz</span>.</li></ul>
+ <!--l. 1067--><p class="nopar" >It is up to the ebuild to ensure that the relevant external utilities are available, whether by
+ being in the system set or via dependencies.
+ </p><!--l. 1070--><p class="noindent" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">unpack-ignore-case</span></span></span> <span
+class="ectt-1000">unpack </span>matches filename extensions in a case-insensitive manner, for
+ EAPIs listed such in table&#x00A0;<a
+href="#x1-135001r20">12.20<!--tex4ht:ref: tab:unpack-behaviour --></a>.
+</p>
+ <div class="table">
+ <!--l. 1074--><p class="noindent" ><a
+ id="x1-135001r20"></a></p><hr class="float" /><div class="float"
+>
+ <div class="caption"
+><span class="id">Table&#x00A0;12.20: </span><span
+class="content"><span
+class="ectt-1000">unpack </span>behaviour for EAPIs</span></div><!--tex4ht:label?: x1-135001r20 -->
+ <div class="tabular">
+ <table id="TBL-57" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-57-1g"><col
+id="TBL-57-1" /><col
+id="TBL-57-2" /><col
+id="TBL-57-3" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-57-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-57-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-57-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Supports absolute and relative paths?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-57-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Case-insensitive matching?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-57-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-57-2-1"
+class="td11"> 0, 1, 2, 3, 4, 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-57-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-57-2-3"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-57-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-57-3-1"
+class="td11"> 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-57-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-57-3-3"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-57-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-57-4-1"
+class="td11"> </td></tr></table></div></div><hr class="endfloat" />
+ </div>
+ <div class="table">
+ <!--l. 1089--><p class="noindent" ><a
+ id="x1-135002r21"></a></p><hr class="float" /><div class="float"
+>
+ <div class="caption"
+><span class="id">Table&#x00A0;12.21: </span><span
+class="content"><span
+class="ectt-1000">unpack </span>extensions for EAPIs</span></div><!--tex4ht:label?: x1-135002r21 -->
+
+
+ <div class="tabular">
+ <table id="TBL-58" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-58-1g"><col
+id="TBL-58-1" /><col
+id="TBL-58-2" /><col
+id="TBL-58-3" /><col
+id="TBL-58-4" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-58-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-58-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-58-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">.xz</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-58-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">.tar.xz</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-58-1-4"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">.txz</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-58-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-58-2-1"
+class="td11"> 0, 1, 2 </td><td style="white-space:nowrap; text-align:left;" id="TBL-58-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-58-2-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-58-2-4"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-58-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-58-3-1"
+class="td11"> 3, 4, 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-58-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-58-3-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-58-3-4"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-58-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-58-4-1"
+class="td11"> 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-58-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-58-4-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-58-4-4"
+class="td11"> Yes </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-58-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-58-5-1"
+class="td11"> </td></tr></table></div></div><hr class="endfloat" />
+ </div>
+ </dd><dt class="description">
+<span
+class="ecbx-1000">inherit</span> </dt><dd
+class="description">See section&#x00A0;<a
+href="#x1-10500010.1">10.1<!--tex4ht:ref: sec:inherit --></a>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">default</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">default-func</span></span></span> Calls the <span
+class="ectt-1000">default_ </span>function for the current phase (see section&#x00A0;<a
+href="#x1-1020009.1.17">9.1.17<!--tex4ht:ref: sec:default-phase-funcs --></a>).
+ Must not be called if the <span
+class="ectt-1000">default_ </span>function does not exist for the current phase in
+ the current EAPI. Only available in EAPIs listed in table&#x00A0;<a
+href="#x1-135034r22">12.22<!--tex4ht:ref: tab:misc-commands --></a> as supporting
+ <span
+class="ectt-1000">default</span>.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">einstalldocs</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">einstalldocs</span></span></span> Takes no arguments. Installs the files specified by the <span
+class="ectt-1000">DOCS </span>and
+ <span
+class="ectt-1000">HTML_DOCS </span>variables or a default set of files, according to algorithm&#x00A0;<a
+href="#x1-135003r4">12.4<!--tex4ht:ref: alg:einstalldocs --></a>. If called using
+ <span
+class="ectt-1000">nonfatal </span>and any of the called commands returns a non-zero exit status, returns
+ immediately with the same exit status. Only available in EAPIs listed in table&#x00A0;<a
+href="#x1-135034r22">12.22<!--tex4ht:ref: tab:misc-commands --></a> as
+ supporting <span
+class="ectt-1000">einstalldocs</span>.
+ <div class="algorithm">
+ <!--l. 1120--><p class="noindent" ><a
+ id="x1-135003r4"></a></p><hr class="float" /><div class="float"
+>
+ <div class="caption"
+><span class="id">Algorithm 12.4: </span><span
+class="content"><span
+class="ectt-1000">einstalldocs </span>logic</span></div><!--tex4ht:label?: x1-135003r4 -->
+<div class="algorithmic">
+<a
+ id="x1-135004r176"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> save the value of the install directory for <span
+class="ectt-1000">dodoc</span> <a
+ id="x1-135005r177"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> set the install directory for <span
+class="ectt-1000">dodoc </span>to <span
+class="ectt-1000">/usr/share/doc/${PF}</span> <a
+ id="x1-135006r178"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;the DOCS variable is a non-empty array&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-135007r179"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> call <span
+class="ectt-1000">dodoc -r "${DOCS[@]}"</span>
+ </span><a
+ id="x1-135008r180"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;the DOCS variable is a non-empty scalar&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-135009r181"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> call <span
+class="ectt-1000">dodoc -r ${DOCS}</span>
+ </span><a
+ id="x1-135010r182"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;the DOCS variable is unset&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-135011r183"></a>
+ <br /><span class="ALCitem">8:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">for all</span>&#x00A0;<span
+class="cmmi-10">d </span>matching the filename expansion of <span
+class="ectt-1000">README* ChangeLog AUTHORS NEWS TODO</span>
+ <span
+class="ectt-1000">CHANGES THANKS BUGS FAQ CREDITS CHANGELOG</span>&#x00A0;<span
+class="ecbx-1000">do</span><span class="for-body">
+<a
+ id="x1-135012r184"></a>
+ <br /><span class="ALCitem">9:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;file <span
+class="cmmi-10">d </span>exists and has a size greater than zero&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-135013r185"></a>
+<br /><span class="ALCitem">10:</span><span class="ALIndent" style="width:34.99146pt;">&nbsp;</span> call <span
+class="ectt-1000">dodoc </span>with <span
+class="cmmi-10">d </span>as argument
+ </span><a
+ id="x1-135014r186"></a>
+<br /><span class="ALCitem">11:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-135015r187"></a>
+<br /><span class="ALCitem">12:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">for</span>
+ </span><a
+ id="x1-135016r188"></a>
+<br /><span class="ALCitem">13:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-135017r189"></a>
+<br /><span class="ALCitem">14:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> set the install directory for <span
+class="ectt-1000">dodoc </span>to <span
+class="ectt-1000">/usr/share/doc/${PF}/html</span> <a
+ id="x1-135018r190"></a>
+<br /><span class="ALCitem">15:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;the HTML_DOCS variable is a non-empty array&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-135019r191"></a>
+<br /><span class="ALCitem">16:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> call <span
+class="ectt-1000">dodoc -r "${HTML_DOCS[@]}"</span>
+ </span><a
+ id="x1-135020r192"></a>
+<br /><span class="ALCitem">17:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">else</span>&#x00A0;<span
+class="ecbx-1000">if</span>&#x00A0;the HTML_DOCS variable is a non-empty scalar&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-135021r193"></a>
+<br /><span class="ALCitem">18:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> call <span
+class="ectt-1000">dodoc -r ${HTML_DOCS}</span>
+
+
+ </span><a
+ id="x1-135022r194"></a>
+<br /><span class="ALCitem">19:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-135023r195"></a>
+<br /><span class="ALCitem">20:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> restore the value of the install directory for <span
+class="ectt-1000">dodoc</span> <a
+ id="x1-135024r196"></a>
+<br /><span class="ALCitem">21:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">return </span>&#x00A0;shell true (0)
+ </div> </div><hr class="endfloat" />
+ </div>
+ </dd><dt class="description">
+<span
+class="ecbx-1000">get_libdir</span> </dt><dd
+class="description"><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">get-libdir</span></span></span> Prints the libdir name obtained according to algorithm&#x00A0;<a
+href="#x1-135025r5">12.5<!--tex4ht:ref: alg:get-libdir --></a>. Only
+ available in EAPIs listed in table&#x00A0;<a
+href="#x1-135034r22">12.22<!--tex4ht:ref: tab:misc-commands --></a> as supporting <span
+class="ectt-1000">get_libdir</span>.
+ <div class="algorithm">
+ <!--l. 1152--><p class="noindent" ><a
+ id="x1-135025r5"></a></p><hr class="float" /><div class="float"
+>
+ <div class="caption"
+><span class="id">Algorithm 12.5: </span><span
+class="content"><span
+class="ectt-1000">get_libdir </span>logic</span></div><!--tex4ht:label?: x1-135025r5 -->
+<div class="algorithmic">
+<a
+ id="x1-135026r197"></a>
+ <span class="ALCitem">1:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> let libdir=lib <a
+ id="x1-135027r198"></a>
+ <br /><span class="ALCitem">2:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;the ABI environment variable is set&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-135028r199"></a>
+ <br /><span class="ALCitem">3:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> let libvar=LIBDIR_$ABI <a
+ id="x1-135029r200"></a>
+ <br /><span class="ALCitem">4:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">if</span>&#x00A0;the environment variable named by libvar is set&#x00A0;<span
+class="ecbx-1000">then</span><span class="if-body">
+<a
+ id="x1-135030r201"></a>
+ <br /><span class="ALCitem">5:</span><span class="ALIndent" style="width:24.9939pt;">&nbsp;</span> let libdir=the value of the variable named by libvar
+ </span><a
+ id="x1-135031r202"></a>
+ <br /><span class="ALCitem">6:</span><span class="ALIndent" style="width:14.99634pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span>
+ </span><a
+ id="x1-135032r203"></a>
+ <br /><span class="ALCitem">7:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> <span
+class="ecbx-1000">end</span>&#x00A0;<span
+class="ecbx-1000">if</span><a
+ id="x1-135033r204"></a>
+ <br /><span class="ALCitem">8:</span><span class="ALIndent" style="width:4.99878pt;">&nbsp;</span> print the value of libdir
+ </div> </div><hr class="endfloat" />
+ </div>
+ </dd></dl>
+<div class="table">
+
+
+<!--l. 1168--><p class="noindent" ><a
+ id="x1-135034r22"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;12.22: </span><span
+class="content">Misc commands for EAPIs</span></div><!--tex4ht:label?: x1-135034r22 -->
+<div class="tabular">
+ <table id="TBL-59" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-59-1g"><col
+id="TBL-59-1" /><col
+id="TBL-59-2" /><col
+id="TBL-59-3" /><col
+id="TBL-59-4" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-59-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-59-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-59-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">default</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-59-1-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">einstalldocs</span><span
+class="ecbx-1000">?</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-59-1-4"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ectt-1000">get_libdir</span><span
+class="ecbx-1000">?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-59-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-59-2-1"
+class="td11"> 0, 1 </td><td style="white-space:nowrap; text-align:left;" id="TBL-59-2-2"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-59-2-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-59-2-4"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-59-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-59-3-1"
+class="td11"> 2, 3, 4, 5 </td><td style="white-space:nowrap; text-align:left;" id="TBL-59-3-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-59-3-3"
+class="td11"> No </td><td style="white-space:nowrap; text-align:left;" id="TBL-59-3-4"
+class="td11"> No </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-59-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-59-4-1"
+class="td11"> 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-59-4-2"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-59-4-3"
+class="td11"> Yes </td><td style="white-space:nowrap; text-align:left;" id="TBL-59-4-4"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-59-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-59-5-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">12.3.16 </span> <a
+ id="x1-13600012.3.16"></a>Debug commands</h4>
+<!--l. 1185--><p class="nopar" >The following commands are available for debugging. Normally all of these commands should be no
+ops; a package manager may provide a special debug mode where these commands instead do
+something. Ebuilds must not run any of these commands once the current phase function has
+returned.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">debug-print</span> </dt><dd
+class="description">If in a special debug mode, the arguments should be outputted or recorded
+ using some kind of debug logging.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">debug-print-function</span> </dt><dd
+class="description">Calls <span
+class="ectt-1000">debug-print </span>with <span
+class="ectt-1000">$1: entering function </span>as the first
+ argument and the remaining arguments as additional arguments.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">debug-print-section</span> </dt><dd
+class="description">Calls <span
+class="ectt-1000">debug-print </span>with <span
+class="ectt-1000">now in section $*</span>.</dd></dl>
+<!--l. 1197--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">12.3.17 </span> <a
+ id="x1-13700012.3.17"></a>Reserved commands and variables</h4>
+<!--l. 1199--><p class="nopar" >Except where documented otherwise, all functions and variables that contain any of the following
+strings (ignoring case) are reserved for package manager use and may not be used or relied upon by
+ebuilds:
+</p><!--l. 1204--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem"><span
+class="ectt-1000">__ </span>(two underscores) at beginning of string
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">abort</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">dyn</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">ebuild</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">hook</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">paludis</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">portage</span>
+ </li>
+ <li class="compactitem"><span
+class="ectt-1000">prep</span></li></ul>
+
+
+
+
+
+
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;13</span><br /><a
+ id="x1-13800013"></a>Merging and Unmerging</h2>
+<dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>In this chapter, <span
+class="ecti-1000">file </span>and <span
+class="ecti-1000">regular file </span>have their Unix meanings.</dd></dl>
+<h3 class="sectionHead"><span class="titlemark">13.1 </span> <a
+ id="x1-13900013.1"></a>Overview</h3>
+<!--l. 7--><p class="nopar" >The merge process merges the contents of the <span
+class="ectt-1000">D </span>directory onto the filesystem under <span
+class="ectt-1000">ROOT</span>. This is
+not a straight copy; there are various subtleties which must be addressed.
+</p><!--l. 10--><p class="noindent" >The unmerge process removes an installed package&#8217;s files. It is not covered in detail in this
+specification.
+</p><!--l. 13--><p class="nopar" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">13.2 </span> <a
+ id="x1-14000013.2"></a>Directories</h3>
+<!--l. 15--><p class="nopar" >Directories are merged recursively onto the filesystem. The method used to perform the merge is
+not specified, so long as the end result is correct. In particular, merging a directory may alter or
+remove the source directory under <span
+class="ectt-1000">D</span>.
+</p><!--l. 19--><p class="noindent" >Ebuilds must not attempt to merge a directory on top of any existing file that is not either a
+directory or a symlink to a directory.
+</p><!--l. 22--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">13.2.1 </span> <a
+ id="x1-14100013.2.1"></a>Permissions</h4>
+<!--l. 24--><p class="nopar" >The owner, group and mode (including set*id and sticky bits) of the directory must be preserved,
+except as follows:
+</p><!--l. 28--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">Any directory owned by the user used to perform the build must become owned by the
+ root user.
+ </li>
+ <li class="compactitem">Any directory whose group is the primary group of the user used to perform the build
+ must have its group be that of the root user.</li></ul>
+<!--l. 33--><p class="noindent" >On SELinux systems, the SELinux context must also be preserved. Other directory attributes,
+including modification time, may be discarded.
+</p><!--l. 36--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">13.2.2 </span> <a
+ id="x1-14200013.2.2"></a>Empty directories</h4>
+<!--l. 38--><p class="nopar" >Behaviour upon encountering an empty directory is undefined. Ebuilds must not attempt to install
+an empty directory.
+
+
+</p><!--l. 41--><p class="nopar" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">13.3 </span> <a
+ id="x1-14300013.3"></a>Regular Files</h3>
+<!--l. 43--><p class="nopar" >Regular files are merged onto the filesystem (but see the notes on configuration file protection,
+below). The method used to perform the merge is not specified, so long as the end result is
+correct. In particular, merging a regular file may alter or remove the source file under
+<span
+class="ectt-1000">D</span>.
+</p><!--l. 47--><p class="noindent" >Ebuilds must not attempt to merge a regular file on top of any existing file that is not either a
+regular file or a symlink to a regular file.
+</p><!--l. 50--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">13.3.1 </span> <a
+ id="x1-14400013.3.1"></a>Permissions</h4>
+<!--l. 52--><p class="nopar" >The owner, group and mode (including set*id and sticky bits) of the file must be preserved, except
+as follows:
+</p><!--l. 56--><p class="noindent" >
+ </p><ul>
+ <li class="compactitem">Any file owned by the user used to perform the build must become owned by the root
+ user.
+ </li>
+ <li class="compactitem">Any file whose group is the primary group of the user used to perform the build must
+ have its group be that of the root user.
+ </li>
+ <li class="compactitem">The package manager may reduce read and write permissions on executable files that
+ have a set*id bit set.</li></ul>
+<!--l. 63--><p class="noindent" >On SELinux systems, the SELinux context must also be preserved. Other file attributes may be
+discarded.
+</p><!--l. 66--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">13.3.2 </span> <a
+ id="x1-14500013.3.2"></a>File modification times</h4>
+<!--l. 68--><p class="nopar" ><span class="fbox"><span
+class="eccc1000-"><span
+class="small-caps">mtime-preserve</span></span></span> In EAPIs listed in table&#x00A0;<a
+href="#x1-145001r1">13.1<!--tex4ht:ref: tab:mtime-preserve --></a>, the package manager must preserve modification
+times of regular files. This includes files being compressed before merging. Exceptions to this are
+files newly created by the package manager and binary object files being stripped of
+symbols.
+</p><!--l. 75--><p class="noindent" >When preserving, the seconds part of every regular file&#8217;s mtime must be preserved exactly. The
+sub-second part must either be set to zero, or set to the greatest value supported by the
+operating system and filesystem that is not greater than the sub-second part of the original
+time.
+</p><!--l. 81--><p class="noindent" >For any given destination filesystem, the package manager must ensure that for any two preserved
+files <span
+class="cmmi-10">a</span>, <span
+class="cmmi-10">b </span>in that filesystem the relation mtime<span
+class="cmr-10">(</span><span
+class="cmmi-10">a</span><span
+class="cmr-10">) </span><span
+class="cmsy-10">&#x2264;</span> mtime<span
+class="cmr-10">(</span><span
+class="cmmi-10">b</span><span
+class="cmr-10">) </span>still holds, if it held under the original
+image directory.
+</p><!--l. 86--><p class="noindent" >In other EAPIs, the behaviour with respect to file modification times is undefined.
+</p>
+<div class="table">
+
+
+<!--l. 90--><p class="noindent" ><a
+ id="x1-145001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Table&#x00A0;13.1: </span><span
+class="content">Preservation of file modification times (mtimes)</span></div><!--tex4ht:label?: x1-145001r1 -->
+<div class="tabular">
+ <table id="TBL-60" class="tabular"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-60-1g"><col
+id="TBL-60-1" /><col
+id="TBL-60-2" /></colgroup><tr
+ style="vertical-align:baseline;" id="TBL-60-1-"><td style="white-space:nowrap; text-align:center;" id="TBL-60-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPI</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-60-1-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">mtimes preserved?</span></div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-60-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-60-2-1"
+class="td11"> 0, 1, 2 </td><td style="white-space:nowrap; text-align:left;" id="TBL-60-2-2"
+class="td11"> Undefined </td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-60-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-60-3-1"
+class="td11"> 3, 4, 5, 6, 7 </td><td style="white-space:nowrap; text-align:left;" id="TBL-60-3-2"
+class="td11"> Yes </td>
+
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-60-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-60-4-1"
+class="td11"> </td></tr></table></div>
+
+
+</div><hr class="endfloat" />
+</div>
+<h4 class="subsectionHead"><span class="titlemark">13.3.3 </span> <a
+ id="x1-14600013.3.3"></a>Configuration file protection</h4>
+<!--l. 106--><p class="nopar" >The package manager must provide a means to prevent user configuration files from
+being overwritten by any package updates. The profile variables <span
+class="ectt-1000">CONFIG_PROTECT </span>and
+<span
+class="ectt-1000">CONFIG_PROTECT_MASK </span>(section&#x00A0;<a
+href="#x1-550005.3">5.3<!--tex4ht:ref: sec:profile-variables --></a>) control the paths for which this must be enforced.
+</p><!--l. 111--><p class="noindent" >In order to ensure interoperability with configuration update tools, the following scheme must be
+used by all package managers when merging any regular file:
+</p><!--l. 115--><p class="noindent" >
+ </p><dl class="compactenum"><dt class="compactenum">
+ 1. </dt><dd
+class="compactenum">If the directory containing the file to be merged is not listed in <span
+class="ectt-1000">CONFIG_PROTECT</span>, and is
+ not a subdirectory of any such directory, and if the file is not listed in <span
+class="ectt-1000">CONFIG_PROTECT</span>,
+ the file is merged normally.
+ </dd><dt class="compactenum">
+ 2. </dt><dd
+class="compactenum">If the directory containing the file to be merged is listed in <span
+class="ectt-1000">CONFIG_PROTECT_MASK</span>, or
+ is a subdirectory of such a directory, or if the file is listed in <span
+class="ectt-1000">CONFIG_PROTECT_MASK</span>,
+ the file is merged normally.
+ </dd><dt class="compactenum">
+ 3. </dt><dd
+class="compactenum">If no existing file with the intended filename exists, or the existing file has identical
+ content to the one being merged, the file is installed normally.
+ </dd><dt class="compactenum">
+ 4. </dt><dd
+class="compactenum">Otherwise, prepend the filename with <span
+class="ectt-1000">._cfg0000_</span>. If no file with the new name exists,
+ then the file is merged with this name.
+ </dd><dt class="compactenum">
+ 5. </dt><dd
+class="compactenum">Otherwise, increment the number portion (to form <span
+class="ectt-1000">._cfg0001_&#x003C;name&#x003E;</span>) and repeat
+ step 4. Continue this process until a usable filename is found.
+ </dd><dt class="compactenum">
+ 6. </dt><dd
+class="compactenum">If 9999 is reached in this way, behaviour is undefined.</dd></dl>
+<!--l. 130--><p class="nopar" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">13.4 </span> <a
+ id="x1-14700013.4"></a>Symlinks</h3>
+<!--l. 132--><p class="nopar" >Symlinks are merged as symlinks onto the filesystem. The link destination for a merged link shall
+be the same as the link destination for the link under <span
+class="ectt-1000">D</span>, except as noted below. The method used
+to perform the merge is not specified, so long as the end result is correct; in particular, merging a
+symlink may alter or remove the symlink under <span
+class="ectt-1000">D</span>.
+</p><!--l. 137--><p class="noindent" >Ebuilds must not attempt to merge a symlink on top of a directory.
+</p><!--l. 139--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><span class="titlemark">13.4.1 </span> <a
+ id="x1-14800013.4.1"></a>Rewriting</h4>
+<!--l. 141--><p class="nopar" >Any absolute symlink whose link starts with <span
+class="ectt-1000">D </span>must be rewritten with the leading <span
+class="ectt-1000">D </span>removed. The
+package manager should issue a notice when doing this.
+
+
+</p><!--l. 144--><p class="nopar" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">13.5 </span> <a
+ id="x1-14900013.5"></a>Hard Links</h3>
+<!--l. 146--><p class="nopar" >A hard link may be merged either as a single file with links or as multiple independent
+files.
+</p><!--l. 148--><p class="nopar" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">13.6 </span> <a
+ id="x1-15000013.6"></a>Other Files</h3>
+<!--l. 150--><p class="nopar" >Ebuilds must not attempt to install any other type of file (FIFOs, device nodes etc).
+
+
+
+
+
+
+</p>
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;14</span><br /><a
+ id="x1-15100014"></a>Metadata Cache</h2>
+<h3 class="sectionHead"><span class="titlemark">14.1 </span> <a
+ id="x1-15200014.1"></a>Directory Contents</h3>
+<!--l. 6--><p class="nopar" >The <span
+class="ectt-1000">metadata/cache </span>directory, if it exists, contains directories whose names are the same
+as categories in the repository. Each subdirectory may optionally contain one file per
+package version in that category, named <span
+class="ectt-1000">&#x003C;package&#x003E;-&#x003C;version&#x003E;</span>, in the format described
+below.
+</p><!--l. 10--><p class="noindent" >The metadata cache may be incomplete or non-existent, and may contain additional bogus
+entries.
+</p><!--l. 12--><p class="nopar" >
+</p>
+<h3 class="sectionHead"><span class="titlemark">14.2 </span> <a
+ id="x1-15300014.2"></a>Cache File Format</h3>
+<!--l. 14--><p class="nopar" >Each cache file contains the textual values of various metadata keys, one per line, in the
+following order. Other lines may be present following these; their meanings are not defined
+here.
+</p><!--l. 18--><p class="noindent" >
+ </p><dl class="compactenum"><dt class="compactenum">
+ 1. </dt><dd
+class="compactenum">Build-time dependencies (<span
+class="ectt-1000">DEPEND</span>)
+ </dd><dt class="compactenum">
+ 2. </dt><dd
+class="compactenum">Run-time dependencies (<span
+class="ectt-1000">RDEPEND</span>)
+ </dd><dt class="compactenum">
+ 3. </dt><dd
+class="compactenum">Slot (<span
+class="ectt-1000">SLOT</span>)
+ </dd><dt class="compactenum">
+ 4. </dt><dd
+class="compactenum">Source tarball URIs (<span
+class="ectt-1000">SRC_URI</span>)
+ </dd><dt class="compactenum">
+ 5. </dt><dd
+class="compactenum"><span
+class="ectt-1000">RESTRICT</span>
+ </dd><dt class="compactenum">
+ 6. </dt><dd
+class="compactenum">Package homepage (<span
+class="ectt-1000">HOMEPAGE</span>)
+ </dd><dt class="compactenum">
+ 7. </dt><dd
+class="compactenum">Package license (<span
+class="ectt-1000">LICENSE</span>)
+ </dd><dt class="compactenum">
+ 8. </dt><dd
+class="compactenum">Package description (<span
+class="ectt-1000">DESCRIPTION</span>)
+ </dd><dt class="compactenum">
+ 9. </dt><dd
+class="compactenum">Package keywords (<span
+class="ectt-1000">KEYWORDS</span>)
+ </dd><dt class="compactenum">
+ 10. </dt><dd
+class="compactenum">Inherited eclasses (<span
+class="ectt-1000">INHERITED</span>)
+ </dd><dt class="compactenum">
+ 11. </dt><dd
+class="compactenum">Use flags that this package respects (<span
+class="ectt-1000">IUSE</span>)
+ </dd><dt class="compactenum">
+ 12. </dt><dd
+class="compactenum">Use flags that this package requires (<span
+class="ectt-1000">REQUIRED_USE</span>). Blank in some EAPIs; see
+ table&#x00A0;<a
+href="#x1-62002r2">7.2<!--tex4ht:ref: tab:optional-vars-table --></a>.
+ </dd><dt class="compactenum">
+ 13. </dt><dd
+class="compactenum">Post dependencies (<span
+class="ectt-1000">PDEPEND</span>)
+ </dd><dt class="compactenum">
+ 14. </dt><dd
+class="compactenum">Build-time dependencies for <span
+class="ectt-1000">CBUILD </span>host (<span
+class="ectt-1000">BDEPEND</span>). Blank in some EAPIs; see
+ table&#x00A0;<a
+href="#x1-68003r3">8.3<!--tex4ht:ref: tab:depend-table --></a>.
+ </dd><dt class="compactenum">
+ 15. </dt><dd
+class="compactenum">The ebuild API version to which this package conforms (<span
+class="ectt-1000">EAPI</span>)
+
+
+ </dd><dt class="compactenum">
+ 16. </dt><dd
+class="compactenum">Properties (<span
+class="ectt-1000">PROPERTIES</span>). In some EAPIs, may optionally be blank, regardless of ebuild
+ metadata; see table&#x00A0;<a
+href="#x1-62002r2">7.2<!--tex4ht:ref: tab:optional-vars-table --></a>.
+ </dd><dt class="compactenum">
+ 17. </dt><dd
+class="compactenum">Defined phases (<span
+class="ectt-1000">DEFINED_PHASES</span>). In some EAPIs, may optionally be blank, regardless
+ of ebuild metadata; see table&#x00A0;<a
+href="#x1-66001r4">7.4<!--tex4ht:ref: tab:defined-phases-table --></a>.
+ </dd><dt class="compactenum">
+ 18. </dt><dd
+class="compactenum">Blank lines to pad the file to 22 lines long</dd></dl>
+<!--l. 42--><p class="noindent" >Future EAPIs may define new variables, remove existing variables, change the line number or
+format used for a particular variable, add or reduce the total length of the file and so on. Any
+future EAPI that uses this cache format will continue to place the EAPI value on line&#x00A0;15 if such a
+concept makes sense for that EAPI, and will place a value that is clearly not a supported EAPI on
+line&#x00A0;15 if it does&#x00A0;not.
+
+
+
+
+
+
+</p>
+<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;15</span><br /><a
+ id="x1-15400015"></a>Glossary</h2>
+<!--l. 4--><p class="nopar" >This section contains explanations of some of the terms used in this document whose meaning may
+not be immediately obvious.
+ </p><dl class="description"><dt class="description">
+<span
+class="ecbx-1000">qualified package name</span> </dt><dd
+class="description">A package name along with its associated category. For example,
+ <span
+class="ectt-1000">app-editors/vim </span>is a qualified package name.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">new-style virtual</span> </dt><dd
+class="description">A new-style virtual is a normal package in the <span
+class="ectt-1000">virtual </span>category which
+ installs no files and uses its dependency requirements to pull in a &#8216;provider&#8217;. Historically,
+ old-style virtuals required special handling from the package manager; new-style
+ virtuals do not.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">stand-alone repository</span> </dt><dd
+class="description">An (ebuild) repository which is intended to function on its own
+ as the only, or primary, repository on a system. Contrast with <span
+class="ecti-1000">slave repository </span>below.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">slave repository, non-stand-alone repository</span> </dt><dd
+class="description">An (ebuild) repository which is not
+ complete enough to function on its own, but needs one or more <span
+class="ecti-1000">master repositories </span>to
+ satisfy dependencies and provide repository-level support files. Known in Portage as
+ an overlay.
+ </dd><dt class="description">
+<span
+class="ecbx-1000">master repository</span> </dt><dd
+class="description">See above.
+ </dd></dl>
+
+
+
+
+<h2 class="likechapterHead"><a
+ id="x1-15500015"></a>Bibliography</h2>
+<a
+ id="Q1-1-239"></a>
+ <div class="thebibliography">
+ <p class="bibitem" ><span class="biblabel">
+ [1]<span class="bibsp">&#x00A0;&#x00A0;&#x00A0;</span></span><a
+ id="XGlep68"></a>Micha&#322; G&oacute;rny. GLEP 68: Package and category metadata.
+ <a
+href="https://www.gentoo.org/glep/glep-0068.html" class="url" ><span
+class="ectt-1000">https://www.gentoo.org/glep/glep-0068.html</span></a>, April 2016.
+ </p>
+ <p class="bibitem" ><span class="biblabel">
+ [2]<span class="bibsp">&#x00A0;&#x00A0;&#x00A0;</span></span><a
+ id="XGlep55"></a>Piotr Jaroszy&#324;ski. GLEP 55: Use EAPI-suffixed ebuilds.
+ <a
+href="https://www.gentoo.org/glep/glep-0055.html" class="url" ><span
+class="ectt-1000">https://www.gentoo.org/glep/glep-0055.html</span></a>, December 2007.
+ </p>
+ <p class="bibitem" ><span class="biblabel">
+ [3]<span class="bibsp">&#x00A0;&#x00A0;&#x00A0;</span></span><a
+ id="XGlep44"></a>Marius Mauch. GLEP 44: Manifest2 format.
+ <a
+href="https://www.gentoo.org/glep/glep-0044.html" class="url" ><span
+class="ectt-1000">https://www.gentoo.org/glep/glep-0044.html</span></a>, December 2005.
+ </p>
+ <p class="bibitem" ><span class="biblabel">
+ [4]<span class="bibsp">&#x00A0;&#x00A0;&#x00A0;</span></span><a
+ id="XGlep37"></a>Jason Stubbs. GLEP 37: Virtuals deprecation.
+ <a
+href="https://www.gentoo.org/glep/glep-0037.html" class="url" ><span
+class="ectt-1000">https://www.gentoo.org/glep/glep-0037.html</span></a>, April 2005.
+</p>
+ </div>
+
+
+
+
+<a
+ id="x1-155005r237"></a>
+<h2 class="appendixHead"><span class="titlemark">Appendix&#x00A0;A</span><br /><a
+ id="x1-156000A"></a>metadata.xml</h2>
+<!--l. 4--><p class="nopar" >The <span
+class="ectt-1000">metadata.xml </span>file is used to contain extra package- or category-level information beyond what
+is stored in ebuild metadata. Its exact format is strictly beyond the scope of this document, and is
+described in GLEP 68&#x00A0;<span class="cite">[<a
+href="#XGlep68">1</a>]</span>.
+
+
+<a
+ id="x1-156001r237"></a>
+</p>
+<h2 class="appendixHead"><span class="titlemark">Appendix&#x00A0;B</span><br /><a
+ id="x1-157000B"></a>Unspecified Items</h2>
+<!--l. 10--><p class="nopar" >The following items are not specified by this document, and must not be relied upon by ebuilds.
+This is, of course, an incomplete list&#8212;it covers only the things that the authors know have been
+abused in the past.
+ </p><ul>
+ <li class="compactitem">The <span
+class="ectt-1000">FEATURES </span>variable. This is Portage specific.
+ </li>
+ <li class="compactitem">Similarly, any <span
+class="ectt-1000">EMERGE_ </span>variable and any <span
+class="ectt-1000">PORTAGE_ </span>variable.
+ </li>
+ <li class="compactitem">Any Portage configuration file.
+ </li>
+ <li class="compactitem">The VDB (<span
+class="ectt-1000">/var/db/pkg</span>). Ebuilds must not access this or rely upon it existing or being
+ in any particular format.
+ </li>
+ <li class="compactitem">The <span
+class="ectt-1000">portageq </span>command. The <span
+class="ectt-1000">has_version </span>and <span
+class="ectt-1000">best_version </span>commands are
+ available as functions.
+ </li>
+ <li class="compactitem">The <span
+class="ectt-1000">emerge </span>command.
+ </li>
+ <li class="compactitem">Binary packages.
+ </li>
+ <li class="compactitem">The <span
+class="ectt-1000">PORTDIR_OVERLAY </span>variable, and overlay behaviour in general.</li></ul>
+
+
+<a
+ id="x1-157001r237"></a>
+<h2 class="appendixHead"><span class="titlemark">Appendix&#x00A0;C</span><br /><a
+ id="x1-158000C"></a>Historical Curiosities</h2>
+<h3 class="sectionHead"><a
+ id="x1-159000C"></a>Long-obsolete Features</h3>
+<!--l. 31--><p class="nopar" >The items described in this section are included for information only. Unless otherwise
+noted, they were deprecated or abandoned long before EAPI was introduced. Ebuilds
+must not use these features, and package managers should not be changed to support
+them.
+</p><!--l. 35--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><a
+ id="x1-160000C"></a>If-else USE blocks</h4>
+<!--l. 36--><p class="nopar" >Historically, Portage supported if-else use conditionals, as shown by listing&#x00A0;<a
+href="#x1-160001r1">C.1<!--tex4ht:ref: lst:if-else-use-listing --></a>. The block before
+the colon would be taken if the condition was met, and the block after the colon would be taken if
+the condition was not met.
+
+
+</p><!--l. 41--><p class="noindent" ><a
+ id="x1-160001r1"></a></p><hr class="float" /><div class="float"
+>
+
+
+ <div class="caption"
+><span class="id">Listing C.1: </span><span
+class="content">If-else use blocks</span></div><!--tex4ht:label?: x1-160001r1 -->
+
+
+<div class="verbatim" id="verbatim-18">
+DEPEND="
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;flag?&#x00A0;(
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;taken/if-true
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;)&#x00A0;:&#x00A0;(
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;taken/if-false
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;)
+&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;"</div>
+<!--l. 50--><p class="nopar" >
+
+
+</p>
+</div><hr class="endfloat" />
+<h4 class="subsectionHead"><a
+ id="x1-161000C"></a>CVS versions</h4>
+<!--l. 54--><p class="nopar" >Portage has very crude support for CVS packages. The package <span
+class="ectt-1000">foo </span>could contain a file named
+<span
+class="ectt-1000">foo-cvs.1.2.3.ebuild</span>. This version would order <span
+class="ecti-1000">higher </span>than any non-CVS version (including
+<span
+class="ectt-1000">foo-2.ebuild</span>). This feature has not seen real world use and breaks versioned dependencies, so it
+must not be used.
+</p><!--l. 59--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><a
+ id="x1-162000C"></a>use.defaults</h4>
+<!--l. 60--><p class="nopar" >The <span
+class="ectt-1000">use.defaults </span>file in the profile directory was used to implement &#8216;autouse&#8217;&#8212;switching USE
+flags on or off depending upon which packages are installed. It was deprecated long ago and finally
+removed in 2009.
+</p><!--l. 64--><p class="nopar" >
+</p>
+<h3 class="sectionHead"><a
+ id="x1-163000C"></a>Retroactive Changes</h3>
+<!--l. 66--><p class="nopar" >In some exceptional cases, changes to the specification have been approved by the Gentoo Council
+without introducing a new EAPI. This section lists such retroactive changes.
+</p><!--l. 69--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><a
+ id="x1-164000C"></a>Bash version</h4>
+<!--l. 70--><p class="nopar" >EAPIs <span
+class="ectt-1000">0</span>, <span
+class="ectt-1000">1 </span>and <span
+class="ectt-1000">2 </span>originally specified GNU Bash version 3.0. This was retroactively updated to
+version 3.2 (see table&#x00A0;<a
+href="#x1-58001r1">6.1<!--tex4ht:ref: tab:bash-version --></a>) in November 2009.
+</p><!--l. 73--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><a
+ id="x1-165000C"></a>Old-style virtuals</h4>
+<!--l. 74--><p class="nopar" >Historically, virtuals were special packages rather than regular ebuilds. An ebuild could specify in
+the <span
+class="ectt-1000">PROVIDE </span>metadata that it supplied certain virtuals, and the package manager had to bear this
+in mind when handling dependencies.
+</p><!--l. 78--><p class="noindent" >Old-style virtuals were supported by EAPIs <span
+class="ectt-1000">0</span>, <span
+class="ectt-1000">1</span>, <span
+class="ectt-1000">2</span>, <span
+class="ectt-1000">3 </span>and <span
+class="ectt-1000">4</span>. They were phased out via GLEP
+37&#x00A0;<span class="cite">[<a
+href="#XGlep37">4</a>]</span> and finally removed in 2011.
+
+
+</p><!--l. 81--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><a
+ id="x1-166000C"></a>EAPI parsing</h4>
+<!--l. 82--><p class="nopar" >The method to specify the EAPI of an ebuild used to be a shell variable assignment, and the
+package manager had to source the ebuild in order to determine the EAPI. Therefore any ebuild
+using a future EAPI would still have to be sourceable by old package managers, which imposed
+restrictions e. g.&#x00A0;on updating the Bash version or on possible changes of global scope functions.
+Several approaches to overcome this limitation were discussed, notably GLEP 55&#x00A0;<span class="cite">[<a
+href="#XGlep55">2</a>]</span>, which was
+rejected though.
+</p><!--l. 89--><p class="noindent" >The current syntax of the <span
+class="ectt-1000">EAPI </span>assignment statement (see section&#x00A0;<a
+href="#x1-630007.3.1">7.3.1<!--tex4ht:ref: sec:eapi --></a>), allowing the package
+manager to obtain the EAPI from the ebuild by a regular expression match and without sourcing
+it, was introduced in May 2012.
+</p><!--l. 93--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><a
+ id="x1-167000C"></a>Package names</h4>
+<!--l. 94--><p class="nopar" >Previously, package names were only required not to end in a hyphen followed by one or
+more digits. In October 2012 this was tightened to the specification in section&#x00A0;<a
+href="#x1-180003.1.2">3.1.2<!--tex4ht:ref: sec:package-names --></a>,
+namely that they must not end in a hyphen followed by anything resembling a package
+version.
+</p><!--l. 98--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><a
+ id="x1-168000C"></a>Asterisk in dependency specification</h4>
+<!--l. 99--><p class="nopar" >In the <span
+class="ectt-1000">= </span>dependency operator specified in section&#x00A0;<a
+href="#x1-760008.2.6.1">8.2.6.1<!--tex4ht:ref: sec:dep-operator --></a>, an asterisk used to induce string prefix
+comparison instead of the normal version comparison logic. That could lead to surprising results,
+e. g.&#x00A0;<span
+class="ectt-1000">=dev-lang/perl-5.2* </span>matching <span
+class="ectt-1000">dev-lang/perl-5.22.0</span>. Moreover, implementation in
+package managers deviated from what was specified.
+</p><!--l. 104--><p class="noindent" >String prefix matching was effective in EAPIs <span
+class="ectt-1000">0</span>, <span
+class="ectt-1000">1</span>, <span
+class="ectt-1000">2</span>, <span
+class="ectt-1000">3</span>, <span
+class="ectt-1000">4 </span>and <span
+class="ectt-1000">5</span>. It was retroactively dropped in
+favour of the current behaviour in October 2015.
+</p><!--l. 107--><p class="nopar" >
+</p>
+<h4 class="subsectionHead"><a
+ id="x1-169000C"></a>Empty dependency groups</h4>
+<!--l. 108--><p class="nopar" >The dependency specification format (see section&#x00A0;<a
+href="#x1-690008.2">8.2<!--tex4ht:ref: sec:dependency-spec --></a>) originally permitted all-of, any-of,
+exactly-one-of, at-most-one-of and use-conditional groups with zero sub-elements. However, such
+empty groups were neither supported by all package managers nor used in ebuilds. They were
+dropped from the specification in October 2017.
+
+
+
+
+
+
+<a
+ id="x1-169001r237"></a>
+</p>
+<h2 class="appendixHead"><span class="titlemark">Appendix&#x00A0;D</span><br /><a
+ id="x1-170000D"></a>Feature Availability by EAPI</h2>
+<dl class="trivlist"><dt class="trivlist">
+</dt><dd
+class="trivlist"><span
+class="ecbx-1000">Note: </span>This chapter is informative and for convenience only. Refer to the main text for
+specifics. For lack of space, EAPIs 0, 1, 2, and&#x00A0;3 have been consolidated into a single column
+in the table below; entries marked with an asterisk differ between these EAPIs. See the
+2012-09-20 edition of this document for a complete table of previous EAPIs.</dd></dl>
+
+
+ <a
+ id="x1-170001r1"></a>
+<!--l. 12--><div class="longtable"> <table id="TBL-61" class="longtable"
+cellspacing="0" cellpadding="0"
+><colgroup id="TBL-61-1g"><col
+id="TBL-61-1" /><col
+id="TBL-61-2" /><col
+id="TBL-61-3" /><col
+id="TBL-61-4" /><col
+id="TBL-61-5" /><col
+id="TBL-61-6" /><col
+id="TBL-61-7" /></colgroup>
+<tr
+ style="vertical-align:baseline;" id="TBL-61-1-"><td colspan="7" style="white-space:nowrap; text-align:center;" id="TBL-61-1-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"> <div class="caption"
+><span class="id">Table&#x00A0;D.1: </span><span
+class="content">Features in EAPIs</span></div><!--tex4ht:label?: x1-170001r1 --> </div> <a
+ id="x1-170002"></a>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-61-2-"><td colspan="7" style="white-space:nowrap; text-align:left;" id="TBL-61-2-1"
+class="td11"><!--cmidrule-->
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-61-3-"><td style="white-space:nowrap; text-align:center;" id="TBL-61-3-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Feature</span></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-61-3-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">Reference</span></div> </td><td colspan="5" style="white-space:nowrap; text-align:center;" id="TBL-61-3-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"><span
+class="ecbx-1000">EAPIs</span></div></td></tr><tr
+ style="vertical-align:baseline;" id="TBL-61-4-"><td style="white-space:nowrap; text-align:center;" id="TBL-61-4-1"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-61-4-2"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;"></div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-61-4-3"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;">0, 1, 2, 3</div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-61-4-4"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;">4</div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-61-4-5"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;">5</div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-61-4-6"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;">6</div> </td><td style="white-space:nowrap; text-align:center;" id="TBL-61-4-7"
+class="td11"> <div class="multicolumn" style="white-space:nowrap; text-align:center;">7</div>
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-61-5-"><td colspan="7" style="white-space:nowrap; text-align:left;" id="TBL-61-5-1"
+class="td11"><!--cmidrule-->
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-61-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-6-1"
+class="td11"> </td></tr><tr
+ style="vertical-align:baseline;" id="TBL-61-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-7-1"
+class="td11"></td><td style="white-space:nowrap; text-align:left;" id="TBL-61-7-2"
+class="td11"> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-7-3"
+class="td11"> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-7-4"
+class="td11"> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-7-5"
+class="td11"> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-7-6"
+class="td11"> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-7-7"
+class="td11">
+</td></tr><tr
+ style="vertical-align:baseline;" id="TBL-61-20-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-20-1"
+class="td11"> <span
+class="ectt-1000">package.mask </span>directory </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-20-2"
+class="td11"> package-mask-dir&#x00A0;p<a
+href="#x1-320004.4">49<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-20-3"
+class="td11">
+ <!--l. 45--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-20-4"
+class="td11">
+ <!--l. 45--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-20-5"
+class="td11">
+ <!--l. 45--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-20-6"
+class="td11">
+ <!--l. 45--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-20-7"
+class="td11">
+ <!--l. 45--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-21-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-21-1"
+class="td11"> Profile files as directories </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-21-2"
+class="td11"> profile-file-dirs&#x00A0;p<a
+href="#x1-480005.2.5">62<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-21-3"
+class="td11">
+ <!--l. 48--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-21-4"
+class="td11">
+ <!--l. 48--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-21-5"
+class="td11">
+ <!--l. 48--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-21-6"
+class="td11">
+ <!--l. 48--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-21-7"
+class="td11">
+ <!--l. 48--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-22-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-22-1"
+class="td11"> <span
+class="ectt-1000">package.provided </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-61-22-2"
+class="td11"> package-provided&#x00A0;p<a
+href="#x1-520005.2.9">66<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-22-3"
+class="td11">
+ <!--l. 51--><p class="noindent" >Optional </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-22-4"
+class="td11">
+ <!--l. 51--><p class="noindent" >Optional </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-22-5"
+class="td11">
+ <!--l. 51--><p class="noindent" >Optional </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-22-6"
+class="td11">
+ <!--l. 51--><p class="noindent" >Optional </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-22-7"
+class="td11">
+ <!--l. 51--><p class="noindent" >No </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-23-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-23-1"
+class="td11"> Stable use masking/forcing </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-23-2"
+class="td11"> stablemask&#x00A0;p<a
+href="#x1-540005.2.11">69<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-23-3"
+class="td11">
+ <!--l. 54--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-23-4"
+class="td11">
+ <!--l. 54--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-23-5"
+class="td11">
+ <!--l. 54--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-23-6"
+class="td11">
+ <!--l. 54--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-23-7"
+class="td11">
+ <!--l. 54--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-24-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-24-1"
+class="td11"> Bash version </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-24-2"
+class="td11"> bash-version&#x00A0;p<a
+href="#x1-580006">86<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-24-3"
+class="td11">
+ <!--l. 57--><p class="noindent" >3.2 </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-24-4"
+class="td11">
+ <!--l. 57--><p class="noindent" >3.2 </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-24-5"
+class="td11">
+ <!--l. 57--><p class="noindent" >3.2 </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-24-6"
+class="td11">
+ <!--l. 57--><p class="noindent" >4.2 </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-24-7"
+class="td11">
+ <!--l. 57--><p class="noindent" >4.2 </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-25-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-25-1"
+class="td11"> <span
+class="ectt-1000">failglob </span>in global scope </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-25-2"
+class="td11"> failglob&#x00A0;p<a
+href="#x1-580006">86<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-25-3"
+class="td11">
+ <!--l. 60--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-25-4"
+class="td11">
+ <!--l. 60--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-25-5"
+class="td11">
+ <!--l. 60--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-25-6"
+class="td11">
+ <!--l. 60--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-25-7"
+class="td11">
+ <!--l. 60--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-26-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-26-1"
+class="td11"> <span
+class="ectt-1000">IUSE </span>defaults </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-26-2"
+class="td11"> iuse-defaults&#x00A0;p<a
+href="#x1-620007.3">93<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-26-3"
+class="td11">
+ <!--l. 63--><p class="noindent" >* </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-26-4"
+class="td11">
+ <!--l. 63--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-26-5"
+class="td11">
+ <!--l. 63--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-26-6"
+class="td11">
+ <!--l. 63--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-26-7"
+class="td11">
+ <!--l. 63--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-27-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-27-1"
+class="td11"> <span
+class="ectt-1000">REQUIRED_USE </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-61-27-2"
+class="td11"> required-use&#x00A0;p<a
+href="#x1-620007.3">93<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-27-3"
+class="td11">
+ <!--l. 66--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-27-4"
+class="td11">
+ <!--l. 66--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-27-5"
+class="td11">
+ <!--l. 66--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-27-6"
+class="td11">
+ <!--l. 66--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-27-7"
+class="td11">
+ <!--l. 66--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-28-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-28-1"
+class="td11"> <span
+class="ectt-1000">PROPERTIES </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-61-28-2"
+class="td11"> properties&#x00A0;p<a
+href="#x1-620007.3">93<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-28-3"
+class="td11">
+ <!--l. 69--><p class="noindent" >Optionally </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-28-4"
+class="td11">
+ <!--l. 69--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-28-5"
+class="td11">
+ <!--l. 69--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-28-6"
+class="td11">
+ <!--l. 69--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-28-7"
+class="td11">
+ <!--l. 69--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-29-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-29-1"
+class="td11"> <span
+class="ectt-1000">RDEPEND=DEPEND </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-61-29-2"
+class="td11"> rdepend-depend&#x00A0;p<a
+href="#x1-650007.3.3">100<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-29-3"
+class="td11">
+ <!--l. 72--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-29-4"
+class="td11">
+ <!--l. 72--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-29-5"
+class="td11">
+ <!--l. 72--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-29-6"
+class="td11">
+ <!--l. 72--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-29-7"
+class="td11">
+ <!--l. 72--><p class="noindent" >No </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-30-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-30-1"
+class="td11"> <span
+class="ectt-1000">DEFINED_PHASES </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-61-30-2"
+class="td11"> defined-phases&#x00A0;p<a
+href="#x1-660007.4">104<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-30-3"
+class="td11">
+ <!--l. 75--><p class="noindent" >Optionally </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-30-4"
+class="td11">
+ <!--l. 75--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-30-5"
+class="td11">
+ <!--l. 75--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-30-6"
+class="td11">
+ <!--l. 75--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-30-7"
+class="td11">
+ <!--l. 75--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-31-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-31-1"
+class="td11"> <span
+class="ectt-1000">BDEPEND </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-61-31-2"
+class="td11"> bdepend&#x00A0;p<a
+href="#x1-680008.1">116<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-31-3"
+class="td11">
+ <!--l. 78--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-31-4"
+class="td11">
+ <!--l. 78--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-31-5"
+class="td11">
+ <!--l. 78--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-31-6"
+class="td11">
+ <!--l. 78--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-31-7"
+class="td11">
+ <!--l. 78--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-32-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-32-1"
+class="td11"> <span
+class="ectt-1000">??&#x00A0;( ) </span>groups </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-32-2"
+class="td11"> at-most-one-of&#x00A0;p<a
+href="#x1-690008.2">119<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-32-3"
+class="td11">
+ <!--l. 81--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-32-4"
+class="td11">
+ <!--l. 81--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-32-5"
+class="td11">
+ <!--l. 81--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-32-6"
+class="td11">
+ <!--l. 81--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-32-7"
+class="td11">
+ <!--l. 81--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-33-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-33-1"
+class="td11"> Empty <span
+class="ectt-1000">||</span>, <span
+class="ectt-1000">^^ </span>groups match </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-33-2"
+class="td11"> empty-dep-groups&#x00A0;p<a
+href="#x1-720008.2.3">126<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-33-3"
+class="td11">
+ <!--l. 85--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-33-4"
+class="td11">
+ <!--l. 85--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-33-5"
+class="td11">
+ <!--l. 85--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-33-6"
+class="td11">
+ <!--l. 85--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-33-7"
+class="td11">
+ <!--l. 85--><p class="noindent" >No </p></td>
+
+
+
+ </tr><tr
+ style="vertical-align:baseline;" id="TBL-61-34-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-34-1"
+class="td11"> <span
+class="ectt-1000">SRC_URI </span>arrows </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-34-2"
+class="td11"> src-uri-arrows&#x00A0;p<a
+href="#x1-830008.2.10">140<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-34-3"
+class="td11">
+ <!--l. 88--><p class="noindent" >* </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-34-4"
+class="td11">
+ <!--l. 88--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-34-5"
+class="td11">
+ <!--l. 88--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-34-6"
+class="td11">
+ <!--l. 88--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-34-7"
+class="td11">
+ <!--l. 88--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-35-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-35-1"
+class="td11"> Slot dependencies </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-35-2"
+class="td11"> slot-deps&#x00A0;p<a
+href="#x1-780008.2.6.3">138<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-35-3"
+class="td11">
+ <!--l. 91--><p class="noindent" >* </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-35-4"
+class="td11">
+ <!--l. 91--><p class="noindent" >Named </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-35-5"
+class="td11">
+ <!--l. 91--><p class="noindent" >Named
+ and
+ Operator </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-35-6"
+class="td11">
+ <!--l. 91--><p class="noindent" >Named
+ and
+ Operator </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-35-7"
+class="td11">
+ <!--l. 91--><p class="noindent" >Named
+ and
+ Operator </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-36-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-36-1"
+class="td11"> Sub-slots </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-36-2"
+class="td11"> sub-slot&#x00A0;p<a
+href="#x1-780008.2.6.3">138<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-36-3"
+class="td11">
+ <!--l. 94--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-36-4"
+class="td11">
+ <!--l. 94--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-36-5"
+class="td11">
+ <!--l. 94--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-36-6"
+class="td11">
+ <!--l. 94--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-36-7"
+class="td11">
+ <!--l. 94--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-37-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-37-1"
+class="td11"> Use dependencies </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-37-2"
+class="td11"> use-deps&#x00A0;p<a
+href="#x1-750008.2.6">129<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-37-3"
+class="td11">
+ <!--l. 97--><p class="noindent" >* </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-37-4"
+class="td11">
+ <!--l. 97--><p class="noindent" >4-style </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-37-5"
+class="td11">
+ <!--l. 97--><p class="noindent" >4-style </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-37-6"
+class="td11">
+ <!--l. 97--><p class="noindent" >4-style </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-37-7"
+class="td11">
+ <!--l. 97--><p class="noindent" >4-style </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-38-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-38-1"
+class="td11"> <span
+class="ectt-1000">!</span>&#x00A0;blockers </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-38-2"
+class="td11"> bang-strength&#x00A0;p<a
+href="#x1-770008.2.6.2">135<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-38-3"
+class="td11">
+ <!--l. 100--><p class="noindent" >* </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-38-4"
+class="td11">
+ <!--l. 100--><p class="noindent" >Weak </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-38-5"
+class="td11">
+ <!--l. 100--><p class="noindent" >Weak </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-38-6"
+class="td11">
+ <!--l. 100--><p class="noindent" >Weak </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-38-7"
+class="td11">
+ <!--l. 100--><p class="noindent" >Weak </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-39-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-39-1"
+class="td11"> <span
+class="ectt-1000">!!</span>&#x00A0;blockers </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-39-2"
+class="td11"> bang-strength&#x00A0;p<a
+href="#x1-770008.2.6.2">135<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-39-3"
+class="td11">
+ <!--l. 103--><p class="noindent" >* </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-39-4"
+class="td11">
+ <!--l. 103--><p class="noindent" >Strong </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-39-5"
+class="td11">
+ <!--l. 103--><p class="noindent" >Strong </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-39-6"
+class="td11">
+ <!--l. 103--><p class="noindent" >Strong </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-39-7"
+class="td11">
+ <!--l. 103--><p class="noindent" >Strong </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-40-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-40-1"
+class="td11"> </td></tr>
+<tr
+ style="vertical-align:baseline;" id="TBL-61-41-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-41-1"
+class="td11"> <span
+class="ectt-1000">S </span>to <span
+class="ectt-1000">WORKDIR </span>fallback </td><td style="white-space:nowrap; text-align:left;" id="TBL-61-41-2"
+class="td11"> s-workdir-fallback&#x00A0;p<a
+href="#x1-860009.1.1">144<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-41-3"
+class="td11">
+ <!--l. 106--><p class="noindent" >Always </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-41-4"
+class="td11">
+ <!--l. 106--><p class="noindent" >Conditional </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-41-5"
+class="td11">
+ <!--l. 106--><p class="noindent" >Conditional </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-41-6"
+class="td11">
+ <!--l. 106--><p class="noindent" >Conditional </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-41-7"
+class="td11">
+ <!--l. 106--><p class="noindent" >Conditional </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-42-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-42-1"
+class="td11"> <span
+class="ectt-1000">pkg_pretend </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-61-42-2"
+class="td11"> pkg-pretend&#x00A0;p<a
+href="#x1-870009.1.2">147<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-42-3"
+class="td11">
+ <!--l. 109--><p class="noindent" >No </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-42-4"
+class="td11">
+ <!--l. 109--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-42-5"
+class="td11">
+ <!--l. 109--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-42-6"
+class="td11">
+ <!--l. 109--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-42-7"
+class="td11">
+ <!--l. 109--><p class="noindent" >Yes </p></td>
+</tr><tr
+ style="vertical-align:baseline;" id="TBL-61-43-"><td style="white-space:nowrap; text-align:left;" id="TBL-61-43-1"
+class="td11"> <span
+class="ectt-1000">src_prepare </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-61-43-2"
+class="td11"> src-prepare&#x00A0;p<a
+href="#x1-900009.1.5">154<!--tex4ht:ref: sec:dependency-spec --></a> </td><td style="white-space:wrap; text-align:left;" id="TBL-61-43-3"
+class="td11">
+ <!--l. 112--><p class="noindent" >* </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-43-4"
+class="td11">
+ <!--l. 112--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-43-5"
+class="td11">
+ <!--l. 112--><p class="noindent" >Yes </p></td><td style="white-space:wrap; text-align:left;" id="TBL-61-43-6"
+class="td11">
+ <!--l. 112--><p class="noindent" >Yes