copy grub legacy from ::gentoo

Signed-off-by: Paul Healy <lmiphay@gmail.com>

6 files changed, 698 insertions, 0 deletions

diff --git a/sys-boot/grub/Manifest b/sys-boot/grub/Manifest
new file mode 100644
index 0000000..e54278c
--- /dev/null
+++ b/sys-boot/grub/Manifest
@@ -0,0 +1,9 @@
+AUX grub-0.97-Add-esp-to-list-of-clobbered-registers.patch 1612 BLAKE2B a8169fc73299a2a0bf59d66f0226da436bef249d543d3509d1c45bd355b0beceab66369ea1c5c4b8e78cb8a8084fbabd6fc09da8efdc0ffac427dc67142a5773 SHA512 85241fc4f939cbf6dc9e18b0b68034835bcb4ac7162fa1dc497e169422b66f0320d59d8270bc13c827a325f45d260028276641cff3f12b4d6096e2d33a12261b
+AUX grub-0.97-ncurses-pkgconfig.patch 799 BLAKE2B da34dca4e6009b6386d66e0b05264293e4095007239558712a0fa7a0b18a8f05112840f1f25355298a67cffe441621e4dbf14a4373d1fe6d91144fad4b799173 SHA512 9456c422e05e75e4221101d66bf1c1ba3efa195ef67872a75790362da825bffe1bcd74c5ff6e3f5a9ccda6b364f02c631c0d513c0de5aa19a78be9bea525c13f
+AUX grub.conf.gentoo 591 BLAKE2B a6a0b98d3bcc1a053d23e98848aafa45691bca8c18564edc1d3526baced67aae0539fa4906913914ea423799fc1098ab2a7c00effa809493a06df73ee6732290 SHA512 23036b9e558b604082d9ae8c848f18ea552181416937e3ef62287e53c38086b8d7ffef0e67d04af04f05f5b23c6da7aaf1f1f23e0ee1cffd5dbd5320e8648cb1
+DIST grub-0.97-patches-1.14.tar.bz2 52916 BLAKE2B 49000402cbdc52bf2bfe31ccc36d0ebc8ba53a58e17bc3a798d3afe5ecec3cc79fb0bb7e786667b96993a7632484b3162e035c358e0fade20ddc2a1ec8e1b073 SHA512 d9a8d420fd5a36f181ca608f9b70be90f9d82cee66c8484636fda5085290586071b5d9379d917e8141b993ffc4777859cd02971c916d6167dca6f50d83282c26
+DIST grub-0.97-patches-1.15.tar.bz2 52887 BLAKE2B a571fe3b918cad590880a277df6ef1bdf094fbc11fd25b2dfb0d790a6b1b37839460475aebc3d6e4f09f59f969ab42dfd8e2b7472aba31c296ed5e03ba3f1030 SHA512 729a4b62bd04aca5b15b83e87b799e1c7e592a5a0265ec6b7a4f4d4ebde05e3e57b62fb6eed6ee1b7692d5dc43dd9ad65898332ff806557b62a7174a797c251a
+DIST grub-0.97.tar.gz 971783 BLAKE2B a7b6feb6dddb6eeb20e027071091b2d37930e5b40687f8c8ff860839db208f832713db61389014d21842e1e152cad0466dc9722a79cbb81bfa1566a30b6b82cc SHA512 c2bc9ffc8583aeae71cee9ddcc4418969768d4e3764d47307da54f93981c0109fb07d84b061b3a3628bd00ba4d14a54742bc04848110eb3ae8ca25dbfbaabadb
+DIST splash.xpm.gz 33856 BLAKE2B e8d0ee91a87ed45f47fa58b07a6476b19ddb3f98ffee41adce46fe9bc4926bbefcac5cd01efc41794049b1c905502b18e69b5f0546bcf3cea79bf351e1817574 SHA512 5ae1f786f7d46a95a7061068d5b2b3ad64607c7b190d6f28379508c5dce67e26308325bfd637542a84855dfcf1ea3d143947326fdb189a6a8972208d3ead23da
+EBUILD grub-0.97-r16.ebuild 9596 BLAKE2B ff6e369d331c18300a8a5b73232d5381ffecac3364ce2c789e3db2f510f1d0ebc929994eaafa41cec4193676c39022f4bda868afd95d5ee15dfa61fadba29bf8 SHA512 26aa6178cc463e79cf3416773517e35606aca9d8721da2f6aee0d5b7db223b32e4ca812188a488734784a5725646daceff24b3ae9d8e14452becad1ce25ebff1
+EBUILD grub-0.97-r18.ebuild 10141 BLAKE2B 7af15e1634c7e96930a7ddaa72d9ab7adae72a0b62729d65d52fd86262d7a7c2a27e2a59c412733463bccc83e9b30d62408d5bebb30f90c99135c05fabc140e7 SHA512 d9c481f77fa1d2f750b64de8cfa02f52be9a0d563607ca50117e4792add79b21e3fb34dc448beebbbb7a99153b9dc5cad01d447209fae154a8205864593c89d6
diff --git a/sys-boot/grub/files/grub-0.97-Add-esp-to-list-of-clobbered-registers.patch b/sys-boot/grub/files/grub-0.97-Add-esp-to-list-of-clobbered-registers.patch
new file mode 100644
index 0000000..c550aab
--- /dev/null
+++ b/sys-boot/grub/files/grub-0.97-Add-esp-to-list-of-clobbered-registers.patch
@@ -0,0 +1,53 @@
+From 5a52ee4b5cd152fa4ccd1c1f938ce2eba652af52 Mon Sep 17 00:00:00 2001
+From: Sergei Trofimovich <slyfox@gentoo.org>
+Date: Mon, 14 Dec 2015 23:59:17 +0000
+Subject: [PATCH] Add %esp to list of clobbered registers
+
+GCC assumes that it can combine stacks from
+outer
+    grub_stage2()
+and inner
+    trampoline doit()
+functions (optimisation -fcombine-stack-adjustments).
+
+But doit() function clobbers %esp in inline
+assebly statement as:
+
+  asm volatile ("movl %%esp, %0\n\tmovl %1, %%esp\n"
+               : "=&r" (realstack) : "r" (simstack));
+
+which tricks gcc into computing invalid local variable
+offsets from current %esp value.
+
+Fix by hinting gcc about %esp change in clobber list.
+
+Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
+---
+ grub/asmstub.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/grub/asmstub.c b/grub/asmstub.c
+index 6354806..44b056f 100644
+--- a/grub/asmstub.c
++++ b/grub/asmstub.c
+@@ -174,7 +174,7 @@ grub_stage2 (void)
+     {
+       /* Make sure our stack lives in the simulated memory area. */
+       asm volatile ("movl %%esp, %0\n\tmovl %1, %%esp\n"
+-		    : "=&r" (realstack) : "r" (simstack));
++		    : "=&r" (realstack) : "r" (simstack) : "%esp");
+       
+       /* Do a setjmp here for the stop command.  */
+       if (! setjmp (env_for_exit))
+@@ -191,7 +191,7 @@ grub_stage2 (void)
+ 	}
+       
+       /* Replace our stack before we use any local variables. */
+-      asm volatile ("movl %0, %%esp\n" : : "r" (realstack));
++      asm volatile ("movl %0, %%esp\n" : : "r" (realstack) : "%esp");
+     }
+ 
+   assert (grub_scratch_mem == 0);
+-- 
+2.6.3
+
diff --git a/sys-boot/grub/files/grub-0.97-ncurses-pkgconfig.patch b/sys-boot/grub/files/grub-0.97-ncurses-pkgconfig.patch
new file mode 100644
index 0000000..d62e434
--- /dev/null
+++ b/sys-boot/grub/files/grub-0.97-ncurses-pkgconfig.patch
@@ -0,0 +1,18 @@
+--- a/configure.ac	2015-12-17 11:09:56.807893315 -0500
++++ b/configure.ac	2015-12-17 11:11:06.697570856 -0500
+@@ -234,10 +234,14 @@
+ 
+ # Unless the user specify --without-curses, check for curses.
+ if test "x$with_curses" != "xno"; then
++  PKG_CHECK_MODULES([NCURSES],[ncurses],[
++    AC_DEFINE(HAVE_LIBCURSES, 1, [Define if you have a curses library])
++    GRUB_LIBS="$GRUB_LIBS $NCURSES_LIBS"
++  ],[
+   AC_CHECK_LIB(ncurses, wgetch, [GRUB_LIBS="$GRUB_LIBS -lncurses"
+   AC_DEFINE(HAVE_LIBCURSES, 1, [Define if you have a curses library])],
+     [AC_CHECK_LIB(curses, wgetch, [GRUB_LIBS="$GRUB_LIBS -lcurses"
+-       AC_DEFINE(HAVE_LIBCURSES, 1, [Define if you have a curses library])])])
++       AC_DEFINE(HAVE_LIBCURSES, 1, [Define if you have a curses library])])])])
+ fi
+ 
+ AC_SUBST(GRUB_LIBS)
diff --git a/sys-boot/grub/files/grub.conf.gentoo b/sys-boot/grub/files/grub.conf.gentoo
new file mode 100644
index 0000000..984470b
--- /dev/null
+++ b/sys-boot/grub/files/grub.conf.gentoo
@@ -0,0 +1,16 @@
+# This is a sample grub.conf for use with Genkernel, per the Gentoo handbook
+# http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=1&chap=10#doc_chap2
+# If you are not using Genkernel and you need help creating this file, you
+# should consult the handbook. Alternatively, consult the grub.conf.sample that
+# is included with the Grub documentation.
+
+default 0
+timeout 30
+#splashimage=(hd0,0)/boot/grub/splash.xpm.gz
+
+#title Gentoo Linux 3.8.13
+#root (hd0,0)
+#kernel /boot/kernel-genkernel-x86-3.8.13-gentoo root=/dev/sda3
+#initrd /boot/initramfs-genkernel-x86-3.8.13
+
+# vim:ft=conf:
diff --git a/sys-boot/grub/grub-0.97-r16.ebuild b/sys-boot/grub/grub-0.97-r16.ebuild
new file mode 100644
index 0000000..22793c0
--- /dev/null
+++ b/sys-boot/grub/grub-0.97-r16.ebuild
@@ -0,0 +1,293 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+# XXX: we need to review menu.lst vs grub.conf handling.  We've been converting
+#      all systems to grub.conf (and symlinking menu.lst to grub.conf), but
+#      we never updated any of the source code (it still all wants menu.lst),
+#      and there is no indication that upstream is making the transition.
+
+# If you need to roll a new grub-static distfile, here is how.
+# - Robin H. Johnson <robbat2@gentoo.org> - 29 Nov 2010
+# FEATURES='-noauto -noinfo -nodoc -noman -splitdebug nostrip' \
+# USE='static -ncurses -netboot -custom-cflags' \
+# PORTAGE_COMPRESS=true GRUB_STATIC_PACKAGE_BUILDING=1 ebuild \
+# grub-${PVR}.ebuild clean package && \
+# qtbz2 -s -j ${PKGDIR}/${CAT}/${PF}.tbz2 && \
+# mv ${PF}.tar.bz2 ${DISTDIR}/grub-static-${PVR}.tar.bz2
+
+EAPI="5"
+
+inherit eutils mount-boot toolchain-funcs linux-info flag-o-matic autotools pax-utils
+
+PATCHVER="1.14" # Should match the revision ideally
+DESCRIPTION="GNU GRUB Legacy boot loader"
+HOMEPAGE="https://www.gnu.org/software/grub/"
+SRC_URI="mirror://gentoo/${P}.tar.gz
+	mirror://gnu-alpha/${PN}/${P}.tar.gz
+	mirror://gentoo/splash.xpm.gz
+	mirror://gentoo/${P}-patches-${PATCHVER}.tar.bz2"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="amd64 x86 ~x86-fbsd"
+IUSE="custom-cflags ncurses netboot static"
+
+LIB_DEPEND="ncurses? ( >=sys-libs/ncurses-5.9-r3:0[static-libs(+),abi_x86_32(-)] )"
+RDEPEND="!static? ( ${LIB_DEPEND//[static-libs(+),/=[} )"
+DEPEND="${RDEPEND}
+	static? ( ${LIB_DEPEND} )"
+RDEPEND+=" !sys-boot/grub:2[-multislot]"
+
+pkg_setup() {
+	case $(tc-arch) in
+	amd64) CONFIG_CHECK='~IA32_EMULATION' check_extra_config ;;
+	esac
+}
+
+src_prepare() {
+	# Grub will not handle a kernel larger than EXTENDED_MEMSIZE Mb as
+	# discovered in bug 160801. We can change this, however, using larger values
+	# for this variable means that Grub needs more memory to run and boot. For a
+	# kernel of size N, Grub needs (N+1)*2.  Advanced users should set a custom
+	# value in make.conf, it is possible to make kernels ~16Mb in size, but it
+	# needs the kitchen sink built-in.
+	local t="custom"
+	if [[ -z ${GRUB_MAX_KERNEL_SIZE} ]] ; then
+		case $(tc-arch) in
+		amd64) GRUB_MAX_KERNEL_SIZE=9 ;;
+		x86)   GRUB_MAX_KERNEL_SIZE=5 ;;
+		esac
+		t="default"
+	fi
+	einfo "Grub will support the ${t} maximum kernel size of ${GRUB_MAX_KERNEL_SIZE} Mb (GRUB_MAX_KERNEL_SIZE)"
+
+	sed -i \
+		-e "/^#define.*EXTENDED_MEMSIZE/s,3,${GRUB_MAX_KERNEL_SIZE},g" \
+		"${S}"/grub/asmstub.c \
+		|| die
+
+	EPATCH_SUFFIX="patch" epatch "${WORKDIR}"/patch
+
+	# Work around issue where the default CFLAGS fail with gcc-4.9.3 (possibly newer), force -O0 instead
+	# bug 564890, 566638
+	if [[ $(gcc-major-version) -ge 5 || $(gcc-major-version) -eq 4 && $(gcc-minor-version) -ge 9 ]]; then
+		if use custom-cflags; then
+			ewarn "You are using custom cflags with gcc-4.9 or newer."
+			ewarn "Be aware the result may segfault at runtime due to unknown optimization"
+			ewarn "incompatibilities."
+		else
+			einfo "Forcing -O0 to get around optimization issue caused by gcc-4.9 and newer with -O2"
+			sed -i	-e "/CFLAGS/s/-O2/-O0/" \
+				"${S}"/configure.ac || die
+		fi
+	fi
+
+	rm -f "${S}"/aclocal.m4 # seems to keep bug 418287 away
+	eautoreconf
+}
+
+src_configure() {
+	filter-flags -fPIE #168834
+
+	use amd64 && multilib_toolchain_setup x86
+
+	unset BLOCK_SIZE #73499
+
+	### i686-specific code in the boot loader is a bad idea; disabling to ensure
+	### at least some compatibility if the hard drive is moved to an older or
+	### incompatible system.
+
+	# grub-0.95 added -fno-stack-protector detection, to disable ssp for stage2,
+	# but the objcopy's (faulty) test fails if -fstack-protector is default.
+	# create a cache telling configure that objcopy is ok, and add -C to econf
+	# to make use of the cache.
+	#
+	# CFLAGS has to be undefined running econf, else -fno-stack-protector detection fails.
+	# STAGE2_CFLAGS is not allowed to be used on emake command-line, it overwrites
+	# -fno-stack-protector detected by configure, removed from netboot's emake.
+	use custom-cflags || unset CFLAGS
+
+	tc-ld-disable-gold #439082 #466536 #526348
+
+	export grub_cv_prog_objcopy_absolute=yes #79734
+	use static && append-ldflags -static
+
+	if use amd64 && use static ; then
+		if [[ -n ${GRUB_STATIC_PACKAGE_BUILDING} ]] ; then
+			eerror "You have set GRUB_STATIC_PACKAGE_BUILDING. This"
+			eerror "is specifically intended for building the tarballs for the"
+			eerror "grub-static package via USE='static -ncurses'."
+			eerror "All bets are now off."
+		fi
+	fi
+
+	# build the net-bootable grub first, but only if "netboot" is set
+	if use netboot ; then
+		mkdir -p "${WORKDIR}"/netboot
+		pushd "${WORKDIR}"/netboot >/dev/null
+		ECONF_SOURCE=${S} \
+		econf \
+			--libdir=/lib \
+			--datadir=/usr/lib/grub \
+			--exec-prefix=/ \
+			--disable-auto-linux-mem-opt \
+			--enable-diskless \
+			--enable-{3c{5{03,07,09,29,95},90x},cs89x0,davicom,depca,eepro{,100}} \
+			--enable-{epic100,exos205,ni5210,lance,ne2100,ni{50,65}10,natsemi} \
+			--enable-{ne,ns8390,wd,otulip,rtl8139,sis900,sk-g16,smc9000,tiara} \
+			--enable-{tulip,via-rhine,w89c840}
+		popd >/dev/null
+	fi
+
+	# Now build the regular grub
+	# Note that FFS and UFS2 support are broken for now - stage1_5 files too big
+	econf \
+		--libdir=/lib \
+		--datadir=/usr/lib/grub \
+		--exec-prefix=/ \
+		--disable-auto-linux-mem-opt \
+		$(use_with ncurses curses)
+
+	# sanity check due to common failure
+	use ncurses && ! grep -qs "HAVE_LIBCURSES.*1" config.h && die "USE=ncurses but curses not found"
+}
+
+src_compile() {
+	use netboot && emake -C "${WORKDIR}"/netboot w89c840_o_CFLAGS="-O"
+	emake
+}
+
+src_test() {
+	# non-default block size also give false pass/fails.
+	unset BLOCK_SIZE
+	emake -j1 check
+}
+
+src_install() {
+	default
+	if use netboot ; then
+		exeinto /usr/lib/grub/${CHOST}
+		doexe "${WORKDIR}"/netboot/stage2/{nbgrub,pxegrub}
+		newexe "${WORKDIR}"/netboot/stage2/stage2 stage2.netboot
+	fi
+
+	pax-mark -m "${D}"/sbin/grub #330745
+
+	newdoc docs/menu.lst grub.conf.sample
+	dodoc "${FILESDIR}"/grub.conf.gentoo
+
+	[[ -n ${GRUB_STATIC_PACKAGE_BUILDING} ]] && \
+		mv "${D}"/usr/share/doc/{${PF},grub-static-${PF/grub-}}
+
+	insinto /usr/share/grub
+	doins "${DISTDIR}"/splash.xpm.gz
+}
+
+setup_boot_dir() {
+	local boot_dir=$1
+	local dir=${boot_dir}
+
+	mkdir -p "${dir}"
+	[[ ! -L ${dir}/boot ]] && ln -s . "${dir}/boot"
+	dir="${dir}/grub"
+	if [[ ! -e ${dir} ]] ; then
+		mkdir "${dir}" || die
+	fi
+
+	# change menu.lst to grub.conf
+	if [[ ! -e ${dir}/grub.conf ]] && [[ -e ${dir}/menu.lst ]] ; then
+		mv -f "${dir}"/menu.lst "${dir}"/grub.conf
+		ewarn "*** IMPORTANT NOTE: menu.lst has been renamed to grub.conf"
+		echo
+	fi
+
+	if [[ ! -e ${dir}/menu.lst ]]; then
+		einfo "Linking from new grub.conf name to menu.lst"
+		ln -snf grub.conf "${dir}"/menu.lst
+	fi
+
+	if [[ -e ${dir}/stage2 ]] ; then
+		mv "${dir}"/stage2{,.old}
+		ewarn "*** IMPORTANT NOTE: you must run grub and install"
+		ewarn "the new version's stage1 to your MBR.  Until you do,"
+		ewarn "stage1 and stage2 will still be the old version, but"
+		ewarn "later stages will be the new version, which could"
+		ewarn "cause problems such as an unbootable system."
+		ewarn
+		ewarn "This means you must use either grub-install or perform"
+		ewarn "root/setup manually."
+		ewarn
+		ewarn "For more help, see the wiki:"
+		ewarn "https://wiki.gentoo.org/wiki/GRUB"
+		echo
+	fi
+
+	einfo "Copying files from /lib/grub and /usr/share/grub to ${dir}"
+	for x in \
+		"${ROOT}"/lib*/grub/*/* \
+		"${ROOT}"/usr/share/grub/* ; do
+		[[ -f ${x} ]] && cp -p "${x}" "${dir}"/
+	done
+
+	if [[ ! -e ${dir}/grub.conf ]] ; then
+		s="${ROOT}/usr/share/doc/${PF}/grub.conf.gentoo"
+		[[ -e "${s}" ]] && cat "${s}" >${dir}/grub.conf
+		[[ -e "${s}.gz" ]] && zcat "${s}.gz" >${dir}/grub.conf
+		[[ -e "${s}.bz2" ]] && bzcat "${s}.bz2" >${dir}/grub.conf
+	fi
+
+	# Per bug 218599, we support grub.conf.install for users that want to run a
+	# specific set of Grub setup commands rather than the default ones.
+	grub_config=${dir}/grub.conf.install
+	[[ -e ${grub_config} ]] || grub_config=${dir}/grub.conf
+	if [[ -e ${grub_config} ]] ; then
+		egrep \
+			-v '^[[:space:]]*(#|$|default|fallback|initrd|password|splashimage|timeout|title)' \
+			"${grub_config}" | \
+		/sbin/grub --batch \
+			--device-map="${dir}"/device.map \
+			> /dev/null
+	fi
+
+	# the grub default commands silently piss themselves if
+	# the default file does not exist ahead of time
+	if [[ ! -e ${dir}/default ]] ; then
+		grub-set-default --root-directory="${boot_dir}" default
+	fi
+	einfo "Grub has been installed to ${boot_dir} successfully."
+}
+
+pkg_postinst() {
+	mount-boot_mount_boot_partition
+
+	if [[ -n ${DONT_MOUNT_BOOT} ]]; then
+		elog "WARNING: you have DONT_MOUNT_BOOT in effect, so you must apply"
+		elog "the following instructions for your /boot!"
+		elog "Neglecting to do so may cause your system to fail to boot!"
+		elog
+	else
+		setup_boot_dir "${ROOT}"/boot
+		# Trailing output because if this is run from pkg_postinst, it gets mixed into
+		# the other output.
+		einfo ""
+	fi
+	elog "To interactively install grub files to another device such as a USB"
+	elog "stick, just run the following and specify the directory as prompted:"
+	elog "   emerge --config =${PF}"
+	elog "Alternately, you can export GRUB_ALT_INSTALLDIR=/path/to/use to tell"
+	elog "grub where to install in a non-interactive way."
+
+	# needs to be after we call setup_boot_dir
+	mount-boot_pkg_postinst
+}
+
+pkg_config() {
+	local dir
+	if [ ! -d "${GRUB_ALT_INSTALLDIR}" ]; then
+		einfo "Enter the directory where you want to setup grub:"
+		read dir
+	else
+		dir="${GRUB_ALT_INSTALLDIR}"
+	fi
+	setup_boot_dir "${dir}"
+}
diff --git a/sys-boot/grub/grub-0.97-r18.ebuild b/sys-boot/grub/grub-0.97-r18.ebuild
new file mode 100644
index 0000000..695b074
--- /dev/null
+++ b/sys-boot/grub/grub-0.97-r18.ebuild
@@ -0,0 +1,309 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+# XXX: we need to review menu.lst vs grub.conf handling.  We've been converting
+#      all systems to grub.conf (and symlinking menu.lst to grub.conf), but
+#      we never updated any of the source code (it still all wants menu.lst),
+#      and there is no indication that upstream is making the transition.
+
+# If you need to roll a new grub-static distfile, here is how.
+# - Robin H. Johnson <robbat2@gentoo.org> - 29 Nov 2010
+# FEATURES='-noauto -noinfo -nodoc -noman -splitdebug nostrip' \
+# USE='static -ncurses -netboot -custom-cflags' \
+# PORTAGE_COMPRESS=true GRUB_STATIC_PACKAGE_BUILDING=1 ebuild \
+# grub-${PVR}.ebuild clean package && \
+# qtbz2 -s -j ${PKGDIR}/${CAT}/${PF}.tbz2 && \
+# mv ${PF}.tar.bz2 ${DISTDIR}/grub-static-${PVR}.tar.bz2
+
+EAPI="6"
+
+inherit eutils mount-boot toolchain-funcs linux-info flag-o-matic autotools pax-utils
+
+PATCHVER="1.15" # Should match the revision ideally
+DESCRIPTION="GNU GRUB Legacy boot loader"
+HOMEPAGE="https://www.gnu.org/software/grub/"
+SRC_URI="mirror://gentoo/${P}.tar.gz
+	mirror://gnu-alpha/${PN}/${P}.tar.gz
+	mirror://gentoo/splash.xpm.gz
+	mirror://gentoo/${P}-patches-${PATCHVER}.tar.bz2
+	https://dev.gentoo.org/~whissi/dist/${PN}/${P}-patches-${PATCHVER}.tar.bz2"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="amd64 x86 ~x86-fbsd"
+IUSE="custom-cflags ncurses netboot static"
+
+LIB_DEPEND="ncurses? ( >=sys-libs/ncurses-5.9-r3:0[static-libs(+),abi_x86_32(-)] )"
+RDEPEND="!static? ( ${LIB_DEPEND//[static-libs(+),/=[} )"
+DEPEND="${RDEPEND}
+	virtual/pkgconfig
+	static? ( ${LIB_DEPEND} )"
+RDEPEND+=" !sys-boot/grub:2[-multislot]"
+
+pkg_setup() {
+	case $(tc-arch) in
+	amd64) CONFIG_CHECK='~IA32_EMULATION' check_extra_config ;;
+	esac
+}
+
+src_prepare() {
+	# Grub will not handle a kernel larger than EXTENDED_MEMSIZE Mb as
+	# discovered in bug 160801. We can change this, however, using larger values
+	# for this variable means that Grub needs more memory to run and boot. For a
+	# kernel of size N, Grub needs (N+1)*2.  Advanced users should set a custom
+	# value in make.conf, it is possible to make kernels ~16Mb in size, but it
+	# needs the kitchen sink built-in.
+	local t="custom"
+	if [[ -z ${GRUB_MAX_KERNEL_SIZE} ]] ; then
+		case $(tc-arch) in
+		amd64) GRUB_MAX_KERNEL_SIZE=9 ;;
+		x86)   GRUB_MAX_KERNEL_SIZE=5 ;;
+		esac
+		t="default"
+	fi
+	einfo "Grub will support the ${t} maximum kernel size of ${GRUB_MAX_KERNEL_SIZE} Mb (GRUB_MAX_KERNEL_SIZE)"
+
+	sed -i \
+		-e "/^#define.*EXTENDED_MEMSIZE/s,3,${GRUB_MAX_KERNEL_SIZE},g" \
+		"${S}"/grub/asmstub.c \
+		|| die
+
+	# gcc-6 and above doesnt have a '-nopie' option patched in, use upstream's -fno-pie
+	if [[ tc-is-gcc && $(gcc-major-version) -gt 5 ]]; then
+		sed -i 's/-nopie/-fno-pie/' \
+			"${WORKDIR}"/patch/860_all_grub-0.97-pie-r1.patch \
+			|| die
+	fi
+
+	EPATCH_SUFFIX="patch" epatch "${WORKDIR}"/patch
+	# bug 564890, 566638
+	epatch "${FILESDIR}"/grub-0.97-Add-esp-to-list-of-clobbered-registers.patch
+	epatch "${FILESDIR}"/grub-0.97-ncurses-pkgconfig.patch
+
+	eapply_user
+
+	rm -f "${S}"/aclocal.m4 # seems to keep bug 418287 away
+	eautoreconf
+}
+
+src_configure() {
+	filter-flags -fPIE #168834
+
+	use amd64 && multilib_toolchain_setup x86
+
+	unset BLOCK_SIZE #73499
+
+	### i686-specific code in the boot loader is a bad idea; disabling to ensure
+	### at least some compatibility if the hard drive is moved to an older or
+	### incompatible system.
+
+	# grub-0.95 added -fno-stack-protector detection, to disable ssp for stage2,
+	# but the objcopy's (faulty) test fails if -fstack-protector is default.
+	# create a cache telling configure that objcopy is ok, and add -C to econf
+	# to make use of the cache.
+	#
+	# CFLAGS has to be undefined running econf, else -fno-stack-protector detection fails.
+	# STAGE2_CFLAGS is not allowed to be used on emake command-line, it overwrites
+	# -fno-stack-protector detected by configure, removed from netboot's emake.
+	use custom-cflags || unset CFLAGS
+
+	tc-ld-disable-gold #439082 #466536 #526348
+
+	export grub_cv_prog_objcopy_absolute=yes #79734
+	use static && append-ldflags -static
+
+	if use amd64 && use static ; then
+		if [[ -n ${GRUB_STATIC_PACKAGE_BUILDING} ]] ; then
+			eerror "You have set GRUB_STATIC_PACKAGE_BUILDING. This"
+			eerror "is specifically intended for building the tarballs for the"
+			eerror "grub-static package via USE='static -ncurses'."
+			eerror "All bets are now off."
+		fi
+	fi
+
+	# build the net-bootable grub first, but only if "netboot" is set
+	if use netboot ; then
+		mkdir -p "${WORKDIR}"/netboot
+		pushd "${WORKDIR}"/netboot >/dev/null
+		ECONF_SOURCE=${S} \
+		econf \
+			--libdir=/lib \
+			--datadir=/usr/lib/grub \
+			--exec-prefix=/ \
+			--disable-auto-linux-mem-opt \
+			--enable-diskless \
+			--enable-{3c{5{03,07,09,29,95},90x},cs89x0,davicom,depca,eepro{,100}} \
+			--enable-{epic100,exos205,ni5210,lance,ne2100,ni{50,65}10,natsemi} \
+			--enable-{ne,ns8390,wd,otulip,rtl8139,sis900,sk-g16,smc9000,tiara} \
+			--enable-{tulip,via-rhine,w89c840}
+		popd >/dev/null
+	fi
+
+	# Now build the regular grub
+	# Note that FFS and UFS2 support are broken for now - stage1_5 files too big
+	econf \
+		--libdir=/lib \
+		--datadir=/usr/lib/grub \
+		--exec-prefix=/ \
+		--disable-auto-linux-mem-opt \
+		$(use_with ncurses curses)
+
+	# sanity check due to common failure
+	use ncurses && ! grep -qs "HAVE_LIBCURSES.*1" config.h && die "USE=ncurses but curses not found"
+}
+
+src_compile() {
+	use netboot && emake -C "${WORKDIR}"/netboot w89c840_o_CFLAGS="-O"
+	emake
+}
+
+src_test() {
+	# non-default block size also give false pass/fails.
+	unset BLOCK_SIZE
+	emake -j1 check
+}
+
+src_install() {
+	local _stage2_file="${S}/stage2/stage2"
+	if [[ -f "${_stage2_file}" ]]; then
+		local _stage2_filesize=$(stat -c '%s' "${_stage2_file}" 2>/dev/null)
+		if [[ -z "${_stage2_filesize}" ]]; then
+			ewarn "Sanity check skipped -- 'stat' returned nothing"
+		elif [[ "${_stage2_filesize}" -gt 1000000 ]]; then
+			eerror "Sanity check failed: stage2 (${_stage2_file}) is larger than 1MB (${_stage2_filesize} bytes)!"
+			eerror "Please check your CFLAGS and/or file a bug report at https://bugs.gentoo.org."
+			die "stage2 sanity check failed"
+		else
+			einfo "stage2 sanity check passed"
+		fi
+	else
+		ewarn "Sanity check skipped -- no stage2 found"
+	fi
+
+	default
+	if use netboot ; then
+		exeinto /usr/lib/grub/${CHOST}
+		doexe "${WORKDIR}"/netboot/stage2/{nbgrub,pxegrub}
+		newexe "${WORKDIR}"/netboot/stage2/stage2 stage2.netboot
+	fi
+
+	pax-mark -m "${D}"/sbin/grub #330745
+
+	newdoc docs/menu.lst grub.conf.sample
+	dodoc "${FILESDIR}"/grub.conf.gentoo
+
+	[[ -n ${GRUB_STATIC_PACKAGE_BUILDING} ]] && \
+		mv "${D}"/usr/share/doc/{${PF},grub-static-${PF/grub-}}
+
+	insinto /usr/share/grub
+	doins "${DISTDIR}"/splash.xpm.gz
+}
+
+setup_boot_dir() {
+	local boot_dir=$1
+	local dir=${boot_dir}
+
+	mkdir -p "${dir}"
+	[[ ! -L ${dir}/boot ]] && ln -s . "${dir}/boot"
+	dir="${dir}/grub"
+	if [[ ! -e ${dir} ]] ; then
+		mkdir "${dir}" || die
+	fi
+
+	# change menu.lst to grub.conf
+	if [[ ! -e ${dir}/grub.conf ]] && [[ -e ${dir}/menu.lst ]] ; then
+		mv -f "${dir}"/menu.lst "${dir}"/grub.conf
+		ewarn "*** IMPORTANT NOTE: menu.lst has been renamed to grub.conf"
+		echo
+	fi
+
+	if [[ ! -e ${dir}/menu.lst ]]; then
+		einfo "Linking from new grub.conf name to menu.lst"
+		ln -snf grub.conf "${dir}"/menu.lst
+	fi
+
+	if [[ -e ${dir}/stage2 ]] ; then
+		mv "${dir}"/stage2{,.old}
+		ewarn "*** IMPORTANT NOTE: you must run grub and install"
+		ewarn "the new version's stage1 to your MBR.  Until you do,"
+		ewarn "stage1 and stage2 will still be the old version, but"
+		ewarn "later stages will be the new version, which could"
+		ewarn "cause problems such as an unbootable system."
+		ewarn
+		ewarn "This means you must use either grub-install or perform"
+		ewarn "root/setup manually."
+		ewarn
+		ewarn "For more help, see the wiki:"
+		ewarn "https://wiki.gentoo.org/wiki/GRUB"
+		echo
+	fi
+
+	einfo "Copying files from /lib/grub and /usr/share/grub to ${dir}"
+	for x in \
+		"${ROOT}"/lib*/grub/*/* \
+		"${ROOT}"/usr/share/grub/* ; do
+		[[ -f ${x} ]] && cp -p "${x}" "${dir}"/
+	done
+
+	if [[ ! -e ${dir}/grub.conf ]] ; then
+		s="${ROOT}/usr/share/doc/${PF}/grub.conf.gentoo"
+		[[ -e "${s}" ]] && cat "${s}" >${dir}/grub.conf
+		[[ -e "${s}.gz" ]] && zcat "${s}.gz" >${dir}/grub.conf
+		[[ -e "${s}.bz2" ]] && bzcat "${s}.bz2" >${dir}/grub.conf
+	fi
+
+	# Per bug 218599, we support grub.conf.install for users that want to run a
+	# specific set of Grub setup commands rather than the default ones.
+	grub_config=${dir}/grub.conf.install
+	[[ -e ${grub_config} ]] || grub_config=${dir}/grub.conf
+	if [[ -e ${grub_config} ]] ; then
+		egrep \
+			-v '^[[:space:]]*(#|$|default|fallback|initrd|password|splashimage|timeout|title)' \
+			"${grub_config}" | \
+		/sbin/grub --batch \
+			--device-map="${dir}"/device.map \
+			> /dev/null
+	fi
+
+	# the grub default commands silently piss themselves if
+	# the default file does not exist ahead of time
+	if [[ ! -e ${dir}/default ]] ; then
+		grub-set-default --root-directory="${boot_dir}" default
+	fi
+	einfo "Grub has been installed to ${boot_dir} successfully."
+}
+
+pkg_postinst() {
+	mount-boot_mount_boot_partition
+
+	if [[ -n ${DONT_MOUNT_BOOT} ]]; then
+		elog "WARNING: you have DONT_MOUNT_BOOT in effect, so you must apply"
+		elog "the following instructions for your /boot!"
+		elog "Neglecting to do so may cause your system to fail to boot!"
+		elog
+	else
+		setup_boot_dir "${ROOT}"/boot
+		# Trailing output because if this is run from pkg_postinst, it gets mixed into
+		# the other output.
+		einfo ""
+	fi
+	elog "To interactively install grub files to another device such as a USB"
+	elog "stick, just run the following and specify the directory as prompted:"
+	elog "   emerge --config =${PF}"
+	elog "Alternately, you can export GRUB_ALT_INSTALLDIR=/path/to/use to tell"
+	elog "grub where to install in a non-interactive way."
+
+	# needs to be after we call setup_boot_dir
+	mount-boot_pkg_postinst
+}
+
+pkg_config() {
+	local dir
+	if [ ! -d "${GRUB_ALT_INSTALLDIR}" ]; then
+		einfo "Enter the directory where you want to setup grub:"
+		read dir
+	else
+		dir="${GRUB_ALT_INSTALLDIR}"
+	fi
+	setup_boot_dir "${dir}"
+}