cmake.eclass: New eclass, EAPI-7 only cleanup of cmake-utils

- Drop all pre-EAPI-7 compatibility
- Drop CMAKE_MIN_VERSION
- Drop CMAKE_REMOVE_MODULES
- Array support for CMAKE_REMOVE_MODULES_LIST
- Drop pushd/popd from src_prepare
- Drop _cmake_generator_to_use()
  CMAKE_MAKEFILE_GENERATOR validity is already checked in global scope.
  Move the check for dev-util/ninja into src_prepare.
- Rename cmake_src_make() -> cmake_build()
- Drop _cmake_ninja_src_build and _cmake_emake_src_build, move into cmake_build

Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>

1 files changed, 637 insertions, 0 deletions

diff --git a/eclass/cmake.eclass b/eclass/cmake.eclass
new file mode 100644
index 000000000000..4a52cd9ea25f
--- /dev/null
+++ b/eclass/cmake.eclass
@@ -0,0 +1,637 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: cmake.eclass
+# @MAINTAINER:
+# kde@gentoo.org
+# @AUTHOR:
+# Tomáš Chvátal <scarabeus@gentoo.org>
+# Maciej Mrozowski <reavertm@gentoo.org>
+# (undisclosed contributors)
+# Original author: Zephyrus (zephyrus@mirach.it)
+# @SUPPORTED_EAPIS: 7
+# @BLURB: common ebuild functions for cmake-based packages
+# @DESCRIPTION:
+# The cmake eclass makes creating ebuilds for cmake-based packages much easier.
+# It provides all inherited features (DOCS, HTML_DOCS, PATCHES) along with
+# out-of-source builds (default), in-source builds and an implementation of the
+# well-known use_enable function for CMake.
+
+if [[ -z ${_CMAKE_ECLASS} ]]; then
+_CMAKE_ECLASS=1
+
+# @ECLASS-VARIABLE: BUILD_DIR
+# @DESCRIPTION:
+# Build directory where all cmake processed files should be generated.
+# For in-source build it's fixed to ${CMAKE_USE_DIR}.
+# For out-of-source build it can be overridden, by default it uses
+# ${WORKDIR}/${P}_build.
+: ${BUILD_DIR:=${WORKDIR}/${P}_build}
+
+# @ECLASS-VARIABLE: CMAKE_BINARY
+# @DESCRIPTION:
+# Eclass can use different cmake binary than the one provided in by system.
+: ${CMAKE_BINARY:=cmake}
+
+# @ECLASS-VARIABLE: CMAKE_BUILD_TYPE
+# @DESCRIPTION:
+# Set to override default CMAKE_BUILD_TYPE. Only useful for packages
+# known to make use of "if (CMAKE_BUILD_TYPE MATCHES xxx)".
+# If about to be set - needs to be set before invoking cmake_src_configure.
+# You usually do *NOT* want nor need to set it as it pulls CMake default
+# build-type specific compiler flags overriding make.conf.
+: ${CMAKE_BUILD_TYPE:=Gentoo}
+
+# @ECLASS-VARIABLE: CMAKE_IN_SOURCE_BUILD
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Set to enable in-source build.
+
+# @ECLASS-VARIABLE: CMAKE_MAKEFILE_GENERATOR
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Specify a makefile generator to be used by cmake.
+# At this point only "emake" and "ninja" are supported.
+# The default is set to "ninja".
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+
+# @ECLASS-VARIABLE: CMAKE_REMOVE_MODULES_LIST
+# @DESCRIPTION:
+# Array of CMake modules that will be removed in $S during src_prepare,
+# in order to force packages to use the system version.
+# Set to "none" to disable removing modules entirely.
+: ${CMAKE_REMOVE_MODULES_LIST:=FindBLAS FindLAPACK}
+
+# @ECLASS-VARIABLE: CMAKE_USE_DIR
+# @DESCRIPTION:
+# Sets the directory where we are working with cmake, for example when
+# application uses autotools and only one plugin needs to be done by cmake.
+# By default it uses ${S}.
+
+# @ECLASS-VARIABLE: CMAKE_VERBOSE
+# @DESCRIPTION:
+# Set to OFF to disable verbose messages during compilation
+: ${CMAKE_VERBOSE:=ON}
+
+# @ECLASS-VARIABLE: CMAKE_WARN_UNUSED_CLI
+# @DESCRIPTION:
+# Warn about variables that are declared on the command line
+# but not used. Might give false-positives.
+# "no" to disable (default) or anything else to enable.
+: ${CMAKE_WARN_UNUSED_CLI:=yes}
+
+# @ECLASS-VARIABLE: CMAKE_EXTRA_CACHE_FILE
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Specifies an extra cache file to pass to cmake. This is the analog of EXTRA_ECONF
+# for econf and is needed to pass TRY_RUN results when cross-compiling.
+# Should be set by user in a per-package basis in /etc/portage/package.env.
+
+# @ECLASS-VARIABLE: CMAKE_QA_SRC_DIR_READONLY
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# After running cmake_src_prepare, sets ${S} to read-only. This is
+# a user flag and should under _no circumstances_ be set in the ebuild.
+# Helps in improving QA of build systems that write to source tree.
+
+case ${EAPI} in
+	7) ;;
+	*) die "EAPI=${EAPI:-0} is not supported" ;;
+esac
+
+inherit toolchain-funcs ninja-utils flag-o-matic multiprocessing xdg-utils
+
+EXPORT_FUNCTIONS src_prepare src_configure src_compile src_test src_install
+
+[[ ${CMAKE_BUILD_DIR} ]] && die "The ebuild must be migrated to BUILD_DIR"
+[[ ${CMAKE_REMOVE_MODULES} ]] && die "CMAKE_REMOVE_MODULES is banned, set CMAKE_REMOVE_MODULES_LIST=\"\" instead"
+[[ ${CMAKE_UTILS_QA_SRC_DIR_READONLY} ]] && die "Use CMAKE_QA_SRC_DIR_READONLY instead"
+[[ ${WANT_CMAKE} ]] && die "WANT_CMAKE has been removed and is a no-op"
+[[ ${PREFIX} ]] && die "PREFIX has been removed and is a no-op"
+
+case ${CMAKE_MAKEFILE_GENERATOR} in
+	emake)
+		BDEPEND="sys-devel/make"
+		;;
+	ninja)
+		BDEPEND="dev-util/ninja"
+		;;
+	*)
+		eerror "Unknown value for \${CMAKE_MAKEFILE_GENERATOR}"
+		die "Value ${CMAKE_MAKEFILE_GENERATOR} is not supported"
+		;;
+esac
+
+if [[ ${PN} != cmake ]]; then
+	BDEPEND+=" dev-util/cmake"
+fi
+
+# @FUNCTION: _cmake_banned_func
+# @INTERNAL
+# @DESCRIPTION:
+# Banned functions are banned.
+_cmake_banned_func() {
+	die "${FUNCNAME[1]} is banned. use -D$1<related_CMake_variable>=\"\$(usex $2)\" instead"
+}
+
+# Determine using IN or OUT source build
+_cmake_check_build_dir() {
+	: ${CMAKE_USE_DIR:=${S}}
+	if [[ -n ${CMAKE_IN_SOURCE_BUILD} ]]; then
+		# we build in source dir
+		BUILD_DIR="${CMAKE_USE_DIR}"
+	fi
+
+	mkdir -p "${BUILD_DIR}" || die
+	einfo "Working in BUILD_DIR: \"$BUILD_DIR\""
+}
+
+# @FUNCTION: cmake_comment_add_subdirectory
+# @USAGE: <subdirectory>
+# @DESCRIPTION:
+# Comment out one or more add_subdirectory calls in CMakeLists.txt in the current directory
+cmake_comment_add_subdirectory() {
+	if [[ -z ${1} ]]; then
+		die "comment_add_subdirectory must be passed at least one directory name to comment"
+	fi
+
+	if [[ -e "CMakeLists.txt" ]]; then
+		local d
+		for d in $@; do
+			sed -e "/add_subdirectory[[:space:]]*([[:space:]]*${d//\//\\/}[[:space:]]*)/I s/^/#DONOTCOMPILE /" \
+				-i CMakeLists.txt || die "failed to comment add_subdirectory(${d})"
+		done
+	fi
+}
+
+# @FUNCTION: comment_add_subdirectory
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use cmake_comment_add_subdirectory instead.
+comment_add_subdirectory() {
+	die "comment_add_subdirectory is banned. Use cmake_comment_add_subdirectory instead"
+}
+
+# @FUNCTION: cmake-utils_use_with
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use -DWITH_FOO=$(usex foo) instead.
+cmake-utils_use_with() { _cmake_banned_func WITH_ "$@" ; }
+
+# @FUNCTION: cmake-utils_use_enable
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use -DENABLE_FOO=$(usex foo) instead.
+cmake-utils_use_enable() { _cmake_banned_func ENABLE_ "$@" ; }
+
+# @FUNCTION: cmake_use_find_package
+# @USAGE: <USE flag> <package name>
+# @DESCRIPTION:
+# Based on use_enable. See ebuild(5).
+#
+# `cmake_use_find_package foo LibFoo` echoes -DCMAKE_DISABLE_FIND_PACKAGE_LibFoo=OFF
+# if foo is enabled and -DCMAKE_DISABLE_FIND_PACKAGE_LibFoo=ON if it is disabled.
+# This can be used to make find_package optional.
+cmake_use_find_package() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	if [[ "$#" != 2 || -z $1 ]] ; then
+		die "Usage: cmake_use_find_package <USE flag> <package name>"
+	fi
+
+	echo "-DCMAKE_DISABLE_FIND_PACKAGE_$2=$(use $1 && echo OFF || echo ON)"
+}
+
+# @FUNCTION: cmake-utils_use_disable
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use -DDISABLE_FOO=$(usex !foo) instead.
+cmake-utils_use_disable() { _cmake_banned_func DISABLE_ "$@" ; }
+
+# @FUNCTION: cmake-utils_use_no
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use -DNO_FOO=$(usex !foo) instead.
+cmake-utils_use_no() { _cmake_banned_func NO_ "$@" ; }
+
+# @FUNCTION: cmake-utils_use_want
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use -DWANT_FOO=$(usex foo) instead.
+cmake-utils_use_want() { _cmake_banned_func WANT_ "$@" ; }
+
+# @FUNCTION: cmake-utils_use_build
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use -DBUILD_FOO=$(usex foo) instead.
+cmake-utils_use_build() { _cmake_banned_func BUILD_ "$@" ; }
+
+# @FUNCTION: cmake-utils_use_has
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use -DHAVE_FOO=$(usex foo) instead.
+cmake-utils_use_has() { _cmake_banned_func HAVE_ "$@" ; }
+
+# @FUNCTION: cmake-utils_use_use
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use -DUSE_FOO=$(usex foo) instead.
+cmake-utils_use_use() { _cmake_banned_func USE_ "$@" ; }
+
+# @FUNCTION: cmake-utils_use
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use -DFOO=$(usex foo) instead.
+cmake-utils_use() { _cmake_banned_func "" "$@" ; }
+
+# @FUNCTION: cmake-utils_useno
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use -DNOFOO=$(usex !foo) instead.
+cmake-utils_useno() { _cmake_banned_func "" "$@" ; }
+
+# Internal function for modifying hardcoded definitions.
+# Removes dangerous definitions that override Gentoo settings.
+_cmake_modify-cmakelists() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	# Only edit the files once
+	grep -qs "<<< Gentoo configuration >>>" "${CMAKE_USE_DIR}"/CMakeLists.txt && return 0
+
+	# Comment out all set (<some_should_be_user_defined_variable> value)
+	find "${CMAKE_USE_DIR}" -name CMakeLists.txt -exec sed \
+		-e '/^[[:space:]]*set[[:space:]]*([[:space:]]*CMAKE_BUILD_TYPE\([[:space:]].*)\|)\)/I{s/^/#_cmake_modify_IGNORE /g}' \
+		-e '/^[[:space:]]*set[[:space:]]*([[:space:]]*CMAKE_COLOR_MAKEFILE[[:space:]].*)/I{s/^/#_cmake_modify_IGNORE /g}' \
+		-e '/^[[:space:]]*set[[:space:]]*([[:space:]]*CMAKE_INSTALL_PREFIX[[:space:]].*)/I{s/^/#_cmake_modify_IGNORE /g}' \
+		-e '/^[[:space:]]*set[[:space:]]*([[:space:]]*CMAKE_VERBOSE_MAKEFILE[[:space:]].*)/I{s/^/#_cmake_modify_IGNORE /g}' \
+		-i {} + || die "${LINENO}: failed to disable hardcoded settings"
+	local x
+	for x in $(find "${CMAKE_USE_DIR}" -name CMakeLists.txt -exec grep -l "^#_cmake_modify_IGNORE" {} +;); do
+		einfo "Hardcoded definition(s) removed in $(echo "${x}" | cut -c $((${#CMAKE_USE_DIR}+2))-):"
+		einfo "$(grep -se '^#_cmake_modify_IGNORE' ${x} | cut -c 22-99)"
+	done
+
+	# NOTE Append some useful summary here
+	cat >> "${CMAKE_USE_DIR}"/CMakeLists.txt <<- _EOF_ || die
+
+		MESSAGE(STATUS "<<< Gentoo configuration >>>
+		Build type      \${CMAKE_BUILD_TYPE}
+		Install path    \${CMAKE_INSTALL_PREFIX}
+		Compiler flags:
+		C               \${CMAKE_C_FLAGS}
+		C++             \${CMAKE_CXX_FLAGS}
+		Linker flags:
+		Executable      \${CMAKE_EXE_LINKER_FLAGS}
+		Module          \${CMAKE_MODULE_LINKER_FLAGS}
+		Shared          \${CMAKE_SHARED_LINKER_FLAGS}\n")
+	_EOF_
+}
+
+# @FUNCTION: cmake_src_prepare
+# @DESCRIPTION:
+# Apply ebuild and user patches.
+cmake_src_prepare() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	default_src_prepare
+	_cmake_check_build_dir
+
+	# check if CMakeLists.txt exist and if no then die
+	if [[ ! -e ${CMAKE_USE_DIR}/CMakeLists.txt ]] ; then
+		eerror "Unable to locate CMakeLists.txt under:"
+		eerror "\"${CMAKE_USE_DIR}/CMakeLists.txt\""
+		eerror "Consider not inheriting the cmake eclass."
+		die "FATAL: Unable to find CMakeLists.txt"
+	fi
+
+	# if ninja is enabled but not installed, the build could fail
+	# this could happen if ninja is manually enabled (eg. make.conf) but not installed
+	if [[ ${CMAKE_MAKEFILE_GENERATOR} == ninja ]] && ! has_version -b dev-util/ninja; then
+		eerror "CMAKE_MAKEFILE_GENERATOR is set to ninja, but ninja is not installed."
+		die "Please install dev-util/ninja or unset CMAKE_MAKEFILE_GENERATOR."
+	fi
+
+	local modules_list
+	if [[ $(declare -p CMAKE_REMOVE_MODULES_LIST) == "declare -a"* ]]; then
+		modules_list=( "${CMAKE_REMOVE_MODULES_LIST[@]}" )
+	else
+		modules_list=( ${CMAKE_REMOVE_MODULES_LIST} )
+	fi
+
+	local name
+	for name in "${modules_list[@]}" ; do
+		find "${S}" -name ${name}.cmake -exec rm -v {} + || die
+	done
+
+	# Remove dangerous things.
+	_cmake_modify-cmakelists
+
+	# make ${S} read-only in order to detect broken build-systems
+	if [[ ${CMAKE_QA_SRC_DIR_READONLY} && ! ${CMAKE_IN_SOURCE_BUILD} ]]; then
+		chmod -R a-w "${S}"
+	fi
+
+	_CMAKE_SRC_PREPARE_HAS_RUN=1
+}
+
+# @VARIABLE: mycmakeargs
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Optional cmake defines as a bash array. Should be defined before calling
+# src_configure.
+# @CODE
+# src_configure() {
+# 	local mycmakeargs=(
+# 		$(cmake_use_with openconnect)
+# 	)
+#
+# 	cmake_src_configure
+# }
+# @CODE
+
+# @FUNCTION: cmake_src_configure
+# @DESCRIPTION:
+# General function for configuring with cmake. Default behaviour is to start an
+# out-of-source build.
+cmake_src_configure() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	[[ ${_CMAKE_SRC_PREPARE_HAS_RUN} ]] || \
+		die "FATAL: cmake_src_prepare has not been run"
+
+	_cmake_check_build_dir
+
+	# Fix xdg collision with sandbox
+	xdg_environment_reset
+
+	# @SEE CMAKE_BUILD_TYPE
+	if [[ ${CMAKE_BUILD_TYPE} = Gentoo ]]; then
+		# Handle release builds
+		if ! in_iuse debug || ! use debug; then
+			local CPPFLAGS=${CPPFLAGS}
+			append-cppflags -DNDEBUG
+		fi
+	fi
+
+	# Prepare Gentoo override rules (set valid compiler, append CPPFLAGS etc.)
+	local build_rules=${BUILD_DIR}/gentoo_rules.cmake
+
+	cat > "${build_rules}" <<- _EOF_ || die
+		SET (CMAKE_ASM_COMPILE_OBJECT "<CMAKE_ASM_COMPILER> <DEFINES> <INCLUDES> ${CPPFLAGS} <FLAGS> -o <OBJECT> -c <SOURCE>" CACHE STRING "ASM compile command" FORCE)
+		SET (CMAKE_ASM-ATT_COMPILE_OBJECT "<CMAKE_ASM-ATT_COMPILER> <DEFINES> <INCLUDES> ${CPPFLAGS} <FLAGS> -o <OBJECT> -c -x assembler <SOURCE>" CACHE STRING "ASM-ATT compile command" FORCE)
+		SET (CMAKE_ASM-ATT_LINK_FLAGS "-nostdlib" CACHE STRING "ASM-ATT link flags" FORCE)
+		SET (CMAKE_C_COMPILE_OBJECT "<CMAKE_C_COMPILER> <DEFINES> <INCLUDES> ${CPPFLAGS} <FLAGS> -o <OBJECT> -c <SOURCE>" CACHE STRING "C compile command" FORCE)
+		SET (CMAKE_CXX_COMPILE_OBJECT "<CMAKE_CXX_COMPILER> <DEFINES> <INCLUDES> ${CPPFLAGS} <FLAGS> -o <OBJECT> -c <SOURCE>" CACHE STRING "C++ compile command" FORCE)
+		SET (CMAKE_Fortran_COMPILE_OBJECT "<CMAKE_Fortran_COMPILER> <DEFINES> <INCLUDES> ${FCFLAGS} <FLAGS> -o <OBJECT> -c <SOURCE>" CACHE STRING "Fortran compile command" FORCE)
+	_EOF_
+
+	local myCC=$(tc-getCC) myCXX=$(tc-getCXX) myFC=$(tc-getFC)
+
+	# !!! IMPORTANT NOTE !!!
+	# Single slash below is intentional. CMake is weird and wants the
+	# CMAKE_*_VARIABLES split into two elements: the first one with
+	# compiler path, and the second one with all command-line options,
+	# space separated.
+	local toolchain_file=${BUILD_DIR}/gentoo_toolchain.cmake
+	cat > ${toolchain_file} <<- _EOF_ || die
+		SET (CMAKE_ASM_COMPILER "${myCC/ /;}")
+		SET (CMAKE_ASM-ATT_COMPILER "${myCC/ /;}")
+		SET (CMAKE_C_COMPILER "${myCC/ /;}")
+		SET (CMAKE_CXX_COMPILER "${myCXX/ /;}")
+		SET (CMAKE_Fortran_COMPILER "${myFC/ /;}")
+		SET (CMAKE_AR $(type -P $(tc-getAR)) CACHE FILEPATH "Archive manager" FORCE)
+		SET (CMAKE_RANLIB $(type -P $(tc-getRANLIB)) CACHE FILEPATH "Archive index generator" FORCE)
+		SET (CMAKE_SYSTEM_PROCESSOR "${CHOST%%-*}")
+	_EOF_
+
+	# We are using the C compiler for assembly by default.
+	local -x ASMFLAGS=${CFLAGS}
+	local -x PKG_CONFIG=$(tc-getPKG_CONFIG)
+
+	if tc-is-cross-compiler; then
+		local sysname
+		case "${KERNEL:-linux}" in
+			Cygwin) sysname="CYGWIN_NT-5.1" ;;
+			HPUX) sysname="HP-UX" ;;
+			linux) sysname="Linux" ;;
+			Winnt)
+				sysname="Windows"
+				cat >> "${toolchain_file}" <<- _EOF_ || die
+					SET (CMAKE_RC_COMPILER $(tc-getRC))
+				_EOF_
+				;;
+			*) sysname="${KERNEL}" ;;
+		esac
+
+		cat >> "${toolchain_file}" <<- _EOF_ || die
+			SET (CMAKE_SYSTEM_NAME "${sysname}")
+		_EOF_
+
+		if [ "${SYSROOT:-/}" != "/" ] ; then
+			# When cross-compiling with a sysroot (e.g. with crossdev's emerge wrappers)
+			# we need to tell cmake to use libs/headers from the sysroot but programs from / only.
+			cat >> "${toolchain_file}" <<- _EOF_ || die
+				SET (CMAKE_FIND_ROOT_PATH "${SYSROOT}")
+				SET (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+				SET (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+				SET (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+			_EOF_
+		fi
+	fi
+
+	if use prefix-guest; then
+		cat >> "${build_rules}" <<- _EOF_ || die
+			# in Prefix we need rpath and must ensure cmake gets our default linker path
+			# right ... except for Darwin hosts
+			IF (NOT APPLE)
+			SET (CMAKE_SKIP_RPATH OFF CACHE BOOL "" FORCE)
+			SET (CMAKE_PLATFORM_REQUIRED_RUNTIME_PATH "${EPREFIX}/usr/${CHOST}/lib/gcc;${EPREFIX}/usr/${CHOST}/lib;${EPREFIX}/usr/$(get_libdir);${EPREFIX}/$(get_libdir)"
+			CACHE STRING "" FORCE)
+
+			ELSE ()
+
+			SET (CMAKE_PREFIX_PATH "${EPREFIX}/usr" CACHE STRING "" FORCE)
+			SET (CMAKE_MACOSX_RPATH ON CACHE BOOL "" FORCE)
+			SET (CMAKE_SKIP_BUILD_RPATH OFF CACHE BOOL "" FORCE)
+			SET (CMAKE_SKIP_RPATH OFF CACHE BOOL "" FORCE)
+			SET (CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE CACHE BOOL "" FORCE)
+
+			ENDIF (NOT APPLE)
+		_EOF_
+	fi
+
+	# Common configure parameters (invariants)
+	local common_config=${BUILD_DIR}/gentoo_common_config.cmake
+	local libdir=$(get_libdir)
+	cat > "${common_config}" <<- _EOF_ || die
+		SET (CMAKE_GENTOO_BUILD ON CACHE BOOL "Indicate Gentoo package build")
+		SET (LIB_SUFFIX ${libdir/lib} CACHE STRING "library path suffix" FORCE)
+		SET (CMAKE_INSTALL_LIBDIR ${libdir} CACHE PATH "Output directory for libraries")
+		SET (CMAKE_INSTALL_INFODIR "${EPREFIX}/usr/share/info" CACHE PATH "")
+		SET (CMAKE_INSTALL_MANDIR "${EPREFIX}/usr/share/man" CACHE PATH "")
+		SET (CMAKE_USER_MAKE_RULES_OVERRIDE "${build_rules}" CACHE FILEPATH "Gentoo override rules")
+		SET (CMAKE_INSTALL_DOCDIR "${EPREFIX}/usr/share/doc/${PF}" CACHE PATH "")
+		SET (BUILD_SHARED_LIBS ON CACHE BOOL "")
+	_EOF_
+	if [[ "${NOCOLOR}" = true || "${NOCOLOR}" = yes ]]; then
+		echo 'SET (CMAKE_COLOR_MAKEFILE OFF CACHE BOOL "pretty colors during make" FORCE)' >> "${common_config}" || die
+	fi
+
+	# Wipe the default optimization flags out of CMake
+	if [[ ${CMAKE_BUILD_TYPE} != Gentoo ]]; then
+		cat >> ${common_config} <<- _EOF_ || die
+			SET (CMAKE_ASM_FLAGS_${CMAKE_BUILD_TYPE^^} "" CACHE STRING "")
+			SET (CMAKE_ASM-ATT_FLAGS_${CMAKE_BUILD_TYPE^^} "" CACHE STRING "")
+			SET (CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE^^} "" CACHE STRING "")
+			SET (CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE^^} "" CACHE STRING "")
+			SET (CMAKE_Fortran_FLAGS_${CMAKE_BUILD_TYPE^^} "" CACHE STRING "")
+			SET (CMAKE_EXE_LINKER_FLAGS_${CMAKE_BUILD_TYPE^^} "" CACHE STRING "")
+			SET (CMAKE_MODULE_LINKER_FLAGS_${CMAKE_BUILD_TYPE^^} "" CACHE STRING "")
+			SET (CMAKE_SHARED_LINKER_FLAGS_${CMAKE_BUILD_TYPE^^} "" CACHE STRING "")
+			SET (CMAKE_STATIC_LINKER_FLAGS_${CMAKE_BUILD_TYPE^^} "" CACHE STRING "")
+		_EOF_
+	fi
+
+	# Make the array a local variable since <=portage-2.1.6.x does not support
+	# global arrays (see bug #297255). But first make sure it is initialised.
+	[[ -z ${mycmakeargs} ]] && declare -a mycmakeargs=()
+	local mycmakeargstype=$(declare -p mycmakeargs 2>&-)
+	if [[ "${mycmakeargstype}" != "declare -a mycmakeargs="* ]]; then
+		die "mycmakeargs must be declared as array"
+	fi
+
+	local mycmakeargs_local=( "${mycmakeargs[@]}" )
+
+	local warn_unused_cli=""
+	if [[ ${CMAKE_WARN_UNUSED_CLI} == no ]] ; then
+		warn_unused_cli="--no-warn-unused-cli"
+	fi
+
+	local generator_name
+	case ${CMAKE_MAKEFILE_GENERATOR} in
+		ninja) generator_name="Ninja" ;;
+		emake) generator_name="Unix Makefiles" ;;
+	esac
+
+	# Common configure parameters (overridable)
+	# NOTE CMAKE_BUILD_TYPE can be only overridden via CMAKE_BUILD_TYPE eclass variable
+	# No -DCMAKE_BUILD_TYPE=xxx definitions will be in effect.
+	local cmakeargs=(
+		${warn_unused_cli}
+		-C "${common_config}"
+		-G "${generator_name}"
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr"
+		"${mycmakeargs_local[@]}"
+		-DCMAKE_BUILD_TYPE="${CMAKE_BUILD_TYPE}"
+		-DCMAKE_TOOLCHAIN_FILE="${toolchain_file}"
+		"${MYCMAKEARGS}"
+	)
+
+	if [[ -n "${CMAKE_EXTRA_CACHE_FILE}" ]] ; then
+		cmakeargs+=( -C "${CMAKE_EXTRA_CACHE_FILE}" )
+	fi
+
+	pushd "${BUILD_DIR}" > /dev/null || die
+	debug-print "${LINENO} ${ECLASS} ${FUNCNAME}: mycmakeargs is ${mycmakeargs_local[*]}"
+	echo "${CMAKE_BINARY}" "${cmakeargs[@]}" "${CMAKE_USE_DIR}"
+	"${CMAKE_BINARY}" "${cmakeargs[@]}" "${CMAKE_USE_DIR}" || die "cmake failed"
+	popd > /dev/null || die
+}
+
+# @FUNCTION: cmake_src_compile
+# @DESCRIPTION:
+# General function for compiling with cmake.
+# Automatically detects the build type. All arguments are passed to emake.
+cmake_src_compile() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	cmake_build "$@"
+}
+
+# @FUNCTION: cmake_build
+# @DESCRIPTION:
+# Function for building the package. Automatically detects the build type.
+# All arguments are passed to emake.
+cmake_build() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	_cmake_check_build_dir
+	pushd "${BUILD_DIR}" > /dev/null || die
+
+	case ${CMAKE_MAKEFILE_GENERATOR} in
+		emake)
+			[[ -e Makefile ]] || die "Makefile not found. Error during configure stage."
+			[[ "${CMAKE_VERBOSE}" != "OFF" ]] && local verbosity="VERBOSE=1"
+			emake "${verbosity} ""$@"
+			;;
+		ninja)
+			[[ -e build.ninja ]] || die "build.ninja not found. Error during configure stage."
+			eninja "$@"
+			;;
+	esac
+
+	popd > /dev/null || die
+}
+
+# @FUNCTION: cmake-utils_src_make
+# @INTERNAL
+# @DESCRIPTION:
+# Banned. Use cmake_build instead.
+cmake-utils_src_make() {
+	die "cmake_src_make is banned. Use cmake_build instead"
+}
+
+# @FUNCTION: cmake_src_test
+# @DESCRIPTION:
+# Function for testing the package. Automatically detects the build type.
+cmake_src_test() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	_cmake_check_build_dir
+	pushd "${BUILD_DIR}" > /dev/null || die
+	[[ -e CTestTestfile.cmake ]] || { echo "No tests found. Skipping."; return 0 ; }
+
+	[[ -n ${TEST_VERBOSE} ]] && myctestargs+=( --extra-verbose --output-on-failure )
+
+	set -- ctest -j "$(makeopts_jobs)" --test-load "$(makeopts_loadavg)" "${myctestargs[@]}" "$@"
+	echo "$@" >&2
+	if "$@" ; then
+		einfo "Tests succeeded."
+		popd > /dev/null || die
+		return 0
+	else
+		if [[ -n "${CMAKE_YES_I_WANT_TO_SEE_THE_TEST_LOG}" ]] ; then
+			# on request from Diego
+			eerror "Tests failed. Test log ${BUILD_DIR}/Testing/Temporary/LastTest.log follows:"
+			eerror "--START TEST LOG--------------------------------------------------------------"
+			cat "${BUILD_DIR}/Testing/Temporary/LastTest.log"
+			eerror "--END TEST LOG----------------------------------------------------------------"
+			die "Tests failed."
+		else
+			die "Tests failed. When you file a bug, please attach the following file: \n\t${BUILD_DIR}/Testing/Temporary/LastTest.log"
+		fi
+
+		# die might not die due to nonfatal
+		popd > /dev/null || die
+		return 1
+	fi
+}
+
+# @FUNCTION: cmake_src_install
+# @DESCRIPTION:
+# Function for installing the package. Automatically detects the build type.
+cmake_src_install() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	_cmake_check_build_dir
+	pushd "${BUILD_DIR}" > /dev/null || die
+	DESTDIR="${D}" ${CMAKE_MAKEFILE_GENERATOR} install "$@" ||
+		die "died running ${CMAKE_MAKEFILE_GENERATOR} install"
+	popd > /dev/null || die
+
+	pushd "${S}" > /dev/null || die
+	einstalldocs
+	popd > /dev/null || die
+}
+
+fi