From 94888b758915aa8b936fd0461ebb684e024c25f1 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Andreas=20K=2E=20H=C3=BCttel?= <dilfridge@gentoo.org>
Date: Sun, 3 Sep 2017 22:06:27 +0200
Subject: [PATCH] sys-libs/glibc: Integrate eclass code of phase functions

---
 sys-libs/glibc/glibc-2.26-r1.ebuild | 904 ++++++++++++++++++++++++++++
 1 file changed, 904 insertions(+)
 create mode 100644 sys-libs/glibc/glibc-2.26-r1.ebuild

diff --git a/sys-libs/glibc/glibc-2.26-r1.ebuild b/sys-libs/glibc/glibc-2.26-r1.ebuild
new file mode 100644
index 000000000000..98b89a06c6f2
--- /dev/null
+++ b/sys-libs/glibc/glibc-2.26-r1.ebuild
@@ -0,0 +1,904 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit toolchain-glibc
+
+DESCRIPTION="GNU libc6 (also called glibc2) C library"
+HOMEPAGE="https://www.gnu.org/software/libc/libc.html"
+
+LICENSE="LGPL-2.1+ BSD HPND ISC inner-net rc PCRE"
+RESTRICT="strip" # strip ourself #46186
+EMULTILIB_PKG="true"
+
+# Configuration variables
+
+if [[ ${PV} == 9999* ]]; then
+	EGIT_REPO_URIS="git://sourceware.org/git/glibc.git"
+	EGIT_SOURCEDIRS="${S}"
+	inherit git-2
+else
+	# KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86"
+	KEYWORDS=""
+fi
+
+RELEASE_VER=${PV}
+
+GCC_BOOTSTRAP_VER="4.7.3-r1"
+# patches live at https://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo/src/patchsets/glibc/
+PATCH_VER="0"                                  # Gentoo patchset
+: ${NPTL_KERN_VER:="2.6.32"}                   # min kernel version nptl requires
+
+IUSE="audit caps debug gd hardened multilib nscd +rpc selinux systemtap profile suid vanilla crosscompile_opts_headers-only"
+
+# Here's how the cross-compile logic breaks down ...
+#  CTARGET - machine that will target the binaries
+#  CHOST   - machine that will host the binaries
+#  CBUILD  - machine that will build the binaries
+# If CTARGET != CHOST, it means you want a libc for cross-compiling.
+# If CHOST != CBUILD, it means you want to cross-compile the libc.
+#  CBUILD = CHOST = CTARGET    - native build/install
+#  CBUILD != (CHOST = CTARGET) - cross-compile a native build
+#  (CBUILD = CHOST) != CTARGET - libc for cross-compiler
+#  CBUILD != CHOST != CTARGET  - cross-compile a libc for a cross-compiler
+# For install paths:
+#  CHOST = CTARGET  - install into /
+#  CHOST != CTARGET - install into /usr/CTARGET/
+
+export CBUILD=${CBUILD:-${CHOST}}
+export CTARGET=${CTARGET:-${CHOST}}
+if [[ ${CTARGET} == ${CHOST} ]] ; then
+	if [[ ${CATEGORY} == cross-* ]] ; then
+		export CTARGET=${CATEGORY#cross-}
+	fi
+fi
+
+is_crosscompile() {
+	[[ ${CHOST} != ${CTARGET} ]]
+}
+
+# Why SLOT 2.2 you ask yourself while sippin your tea ?
+# Everyone knows 2.2 > 0, duh.
+SLOT="2.2"
+
+# General: We need a new-enough binutils/gcc to match upstream baseline.
+# arch: we need to make sure our binutils/gcc supports TLS.
+COMMON_DEPEND="
+	nscd? ( selinux? (
+		audit? ( sys-process/audit )
+		caps? ( sys-libs/libcap )
+	) )
+	suid? ( caps? ( sys-libs/libcap ) )
+	selinux? ( sys-libs/libselinux )
+"
+DEPEND="${COMMON_DEPEND}
+	>=app-misc/pax-utils-0.1.10
+	!<sys-apps/sandbox-1.6
+	!<sys-apps/portage-2.1.2"
+RDEPEND="${COMMON_DEPEND}
+	!sys-kernel/ps3-sources
+	sys-apps/gentoo-functions
+	!sys-libs/nss-db"
+
+if [[ ${CATEGORY} == cross-* ]] ; then
+	DEPEND+=" !crosscompile_opts_headers-only? (
+		>=${CATEGORY}/binutils-2.24
+		>=${CATEGORY}/gcc-4.7
+	)"
+	[[ ${CATEGORY} == *-linux* ]] && DEPEND+=" ${CATEGORY}/linux-headers"
+else
+	DEPEND+="
+		>=sys-devel/binutils-2.24
+		>=sys-devel/gcc-4.7
+		virtual/os-headers"
+	RDEPEND+=" vanilla? ( !sys-libs/timezone-data )"
+	PDEPEND+=" !vanilla? ( sys-libs/timezone-data )"
+fi
+
+upstream_uris() {
+	echo mirror://gnu/glibc/$1 ftp://sourceware.org/pub/glibc/{releases,snapshots}/$1 mirror://gentoo/$1
+}
+gentoo_uris() {
+	local devspace="HTTP~vapier/dist/URI HTTP~tamiko/distfiles/URI HTTP~dilfridge/distfiles/URI HTTP~slyfox/distfiles/URI"
+	devspace=${devspace//HTTP/https://dev.gentoo.org/}
+	echo mirror://gentoo/$1 ${devspace//URI/$1}
+}
+SRC_URI=$(
+	[[ -z ${EGIT_REPO_URIS} ]] && upstream_uris ${P}.tar.xz
+	[[ -n ${PATCH_VER}      ]] && gentoo_uris ${P}-patches-${PATCH_VER}.tar.bz2
+)
+SRC_URI+=" ${GCC_BOOTSTRAP_VER:+multilib? ( $(gentoo_uris gcc-${GCC_BOOTSTRAP_VER}-multilib-bootstrap.tar.bz2) )}"
+
+#
+# the phases
+#
+
+pkg_pretend() {
+    check_devpts
+
+	# Prevent native builds from downgrading.
+	if [[ ${MERGE_TYPE} != "buildonly" ]] && \
+	   [[ ${ROOT} == "/" ]] && \
+	   [[ ${CBUILD} == ${CHOST} ]] && \
+	   [[ ${CHOST} == ${CTARGET} ]] ; then
+		# The high rev # is to allow people to downgrade between -r# versions.
+		# We want to block 2.20->2.19, but 2.20-r3->2.20-r2 should be fine.
+		# Hopefully we never actually use a r# this high.
+		if has_version ">${CATEGORY}/${P}-r10000" ; then
+			eerror "Sanity check to keep you from breaking your system:"
+			eerror " Downgrading glibc is not supported and a sure way to destruction"
+			die "aborting to save your system"
+		fi
+
+		if ! glibc_run_test '#include <pwd.h>\nint main(){return getpwuid(0)==0;}\n'
+		then
+			eerror "Your patched vendor kernel is broken.  You need to get an"
+			eerror "update from whoever is providing the kernel to you."
+			eerror "https://sourceware.org/bugzilla/show_bug.cgi?id=5227"
+			eerror "http://bugs.gentoo.org/262698"
+			die "keeping your system alive, say thank you"
+		fi
+
+		if ! glibc_run_test '#include <unistd.h>\n#include <sys/syscall.h>\nint main(){return syscall(1000)!=-1;}\n'
+		then
+			eerror "Your old kernel is broken.  You need to update it to"
+			eerror "a newer version as syscall(<bignum>) will break."
+			eerror "http://bugs.gentoo.org/279260"
+			die "keeping your system alive, say thank you"
+		fi
+	fi
+
+	# users have had a chance to phase themselves, time to give em the boot
+	if [[ -e ${EROOT}/etc/locale.gen ]] && [[ -e ${EROOT}/etc/locales.build ]] ; then
+		eerror "You still haven't deleted ${EROOT}/etc/locales.build."
+		eerror "Do so now after making sure ${EROOT}/etc/locale.gen is kosher."
+		die "lazy upgrader detected"
+	fi
+
+	if [[ ${CTARGET} == i386-* ]] ; then
+		eerror "i386 CHOSTs are no longer supported."
+		eerror "Chances are you don't actually want/need i386."
+		eerror "Please read http://www.gentoo.org/doc/en/change-chost.xml"
+		die "please fix your CHOST"
+	fi
+
+	if [[ -e /proc/xen ]] && [[ $(tc-arch) == "x86" ]] && ! is-flag -mno-tls-direct-seg-refs ; then
+		ewarn "You are using Xen but don't have -mno-tls-direct-seg-refs in your CFLAGS."
+		ewarn "This will result in a 50% performance penalty when running with a 32bit"
+		ewarn "hypervisor, which is probably not what you want."
+	fi
+
+	use hardened && ! tc-enables-pie && \
+		ewarn "PIE hardening not applied, as your compiler doesn't default to PIE"
+
+	# Make sure host system is up to date #394453
+	if has_version '<sys-libs/glibc-2.13' && \
+	   [[ -n $(scanelf -qys__guard -F'#s%F' "${EROOT}"/lib*/l*-*.so) ]]
+	then
+		ebegin "Scanning system for __guard to see if you need to rebuild first ..."
+		local files=$(
+			scanelf -qys__guard -F'#s%F' \
+				"${EROOT}"/*bin/ \
+				"${EROOT}"/lib* \
+				"${EROOT}"/usr/*bin/ \
+				"${EROOT}"/usr/lib* | \
+				egrep -v \
+					-e "^${EROOT}/lib.*/(libc|ld)-2.*.so$" \
+					-e "^${EROOT}/sbin/(ldconfig|sln)$"
+		)
+		[[ -z ${files} ]]
+		if ! eend $? ; then
+			eerror "Your system still has old SSP __guard symbols.  You need to"
+			eerror "rebuild all the packages that provide these files first:"
+			eerror "${files}"
+			die "old __guard detected"
+		fi
+	fi
+}
+
+src_unpack() {
+	[[ -n ${GCC_BOOTSTRAP_VER} ]] && use multilib && unpack gcc-${GCC_BOOTSTRAP_VER}-multilib-bootstrap.tar.bz2
+
+	setup_env
+
+	# Check NPTL support _before_ we unpack things to save some time
+	want_nptl && check_nptl_support
+
+	if [[ -n ${EGIT_REPO_URIS} ]] ; then
+		local i d
+		for ((i=0; i<${#EGIT_REPO_URIS[@]}; ++i)) ; do
+			EGIT_REPO_URI=${EGIT_REPO_URIS[$i]}
+			EGIT_SOURCEDIR=${EGIT_SOURCEDIRS[$i]}
+			git-2_src_unpack
+		done
+	else
+		unpack_pkg
+	fi
+
+	cd "${S}"
+	touch locale/C-translit.h #185476 #218003
+	[[ -n ${LT_VER}     ]] && unpack_pkg linuxthreads ${LT_VER}
+	[[ -n ${PORTS_VER}  ]] && unpack_pkg ports ${PORTS_VER}
+	[[ -n ${LIBIDN_VER} ]] && unpack_pkg libidn
+
+	if [[ -n ${PATCH_VER} ]] ; then
+		cd "${WORKDIR}"
+		unpack glibc-${RELEASE_VER}-patches-${PATCH_VER}.tar.bz2
+		# pull out all the addons
+		local d
+		for d in extra/*/configure ; do
+			d=${d%/configure}
+			[[ -d ${S}/${d} ]] && die "${d} already exists in \${S}"
+			mv "${d}" "${S}" || die "moving ${d} failed"
+		done
+	fi
+}
+
+src_prepare() {
+	# XXX: We should do the branchupdate, before extracting the manpages and
+	# infopages else it does not help much (mtimes change if there is a change
+	# to them with branchupdate)
+	if [[ -n ${BRANCH_UPDATE} ]] ; then
+		epatch "${DISTDIR}"/glibc-${RELEASE_VER}-branch-update-${BRANCH_UPDATE}.patch.bz2
+
+		# Snapshot date patch
+		einfo "Patching version to display snapshot date ..."
+		sed -i -e "s:\(#define RELEASE\).*:\1 \"${BRANCH_UPDATE}\":" version.h
+	fi
+
+	if [[ -n ${PATCH_VER} ]] && ! use vanilla ; then
+		EPATCH_MULTI_MSG="Applying Gentoo Glibc Patchset ${RELEASE_VER}-${PATCH_VER} ..." \
+		EPATCH_EXCLUDE=${GLIBC_PATCH_EXCLUDE} \
+		EPATCH_SUFFIX="patch" \
+		ARCH=$(tc-arch) \
+		epatch "${WORKDIR}"/patches
+	fi
+
+	if just_headers ; then
+		if [[ -e ports/sysdeps/mips/preconfigure ]] ; then
+			# mips peeps like to screw with us.  if building headers,
+			# we don't have a real compiler, so we can't let them
+			# insert -mabi on us.
+			sed -i '/CPPFLAGS=.*-mabi/s|.*|:|' ports/sysdeps/mips/preconfigure || die
+			find ports/sysdeps/mips/ -name Makefile -exec sed -i '/^CC.*-mabi=/s:-mabi=.*:-D_MIPS_SZPTR=32:' {} +
+		fi
+	fi
+
+	eapply_user
+
+	gnuconfig_update
+
+	cd "${WORKDIR}"
+	find . -type f '(' -size 0 -o -name "*.orig" ')' -delete
+	find . -name configure -exec touch {} +
+
+	eprefixify extra/locale/locale-gen
+
+	# Fix permissions on some of the scripts.
+	chmod u+x "${S}"/scripts/*.sh
+
+	cd "${S}"
+
+	if use hardened ; then
+		# We don't enable these for non-hardened as the output is very terse --
+		# it only states that a crash happened.  The default upstream behavior
+		# includes backtraces and symbols.
+		einfo "Installing Hardened Gentoo SSP and FORTIFY_SOURCE handler"
+		cp "${FILESDIR}"/2.20/glibc-2.20-gentoo-stack_chk_fail.c debug/stack_chk_fail.c || die
+		cp "${FILESDIR}"/2.25/glibc-2.25-gentoo-chk_fail.c debug/chk_fail.c || die
+
+		if use debug ; then
+			# Allow SIGABRT to dump core on non-hardened systems, or when debug is requested.
+			sed -i \
+				-e '/^CFLAGS-backtrace.c/ iCPPFLAGS-stack_chk_fail.c = -DSSP_SMASH_DUMPS_CORE' \
+				-e '/^CFLAGS-backtrace.c/ iCPPFLAGS-chk_fail.c = -DSSP_SMASH_DUMPS_CORE' \
+				debug/Makefile || die
+		fi
+	fi
+
+	case $(gcc-fullversion) in
+	4.8.[0-3]|4.9.0)
+		eerror "You need to switch to a newer compiler; gcc-4.8.[0-3] and gcc-4.9.0 miscompile"
+		eerror "glibc.  See https://bugs.gentoo.org/547420 for details."
+		die "need to switch compilers #547420"
+		;;
+	esac
+}
+
+glibc_do_configure() {
+	# Glibc does not work with gold (for various reasons) #269274.
+	tc-ld-disable-gold
+
+	dump_toolchain_settings "Configuring glibc for $1"
+
+	local myconf=()
+
+	# set addons
+	pushd "${S}" > /dev/null
+	local addons=$(echo */configure | sed \
+		-e 's:/configure::g' \
+		-e 's:\(linuxthreads\|nptl\|rtkaio\|glibc-compat\)\( \|$\)::g' \
+		-e 's: \+$::' \
+		-e 's! !,!g' \
+		-e 's!^!,!' \
+		-e '/^,\*$/d')
+	[[ -d ports ]] && addons+=",ports"
+	popd > /dev/null
+
+	if has_version '<sys-libs/glibc-2.13' ; then
+		myconf+=( --enable-old-ssp-compat )
+	fi
+
+	if version_is_at_least 2.25 ; then
+		myconf+=( --enable-stack-protector=all )
+	fi
+
+	if version_is_at_least 2.25 ; then
+		myconf+=( --enable-stackguard-randomization )
+	else
+		myconf+=( $(use_enable hardened stackguard-randomization) )
+	fi
+
+	[[ $(tc-is-softfloat) == "yes" ]] && myconf+=( --without-fp )
+
+	if [[ $1 == "linuxthreads" ]] ; then
+		if want_tls ; then
+			myconf+=( --with-tls )
+
+			if ! want__thread || use glibc-compat20 || [[ ${LT_KER_VER} == 2.[02].* ]] ; then
+				myconf+=( --without-__thread )
+			else
+				myconf+=( --with-__thread )
+			fi
+		else
+			myconf+=( --without-tls --without-__thread )
+		fi
+
+		myconf+=( --disable-sanity-checks )
+		addons="linuxthreads${addons}"
+		myconf+=( --enable-kernel=${LT_KER_VER} )
+	elif [[ $1 == "nptl" ]] ; then
+		# Newer versions require nptl, so there is no addon for it.
+		version_is_at_least 2.20 || addons="nptl${addons}"
+		myconf+=( --enable-kernel=${NPTL_KERN_VER} )
+	else
+		die "invalid pthread option"
+	fi
+	myconf+=( --enable-add-ons="${addons#,}" )
+
+	# Since SELinux support is only required for nscd, only enable it if:
+	# 1. USE selinux
+	# 2. only for the primary ABI on multilib systems
+	# 3. Not a crosscompile
+	if ! is_crosscompile && use selinux ; then
+		if use multilib ; then
+			if is_final_abi ; then
+				myconf+=( --with-selinux )
+			else
+				myconf+=( --without-selinux )
+			fi
+		else
+			myconf+=( --with-selinux )
+		fi
+	else
+		myconf+=( --without-selinux )
+	fi
+
+	# Force a few tests where we always know the answer but
+	# configure is incapable of finding it.
+	if is_crosscompile ; then
+		export \
+			libc_cv_c_cleanup=yes \
+			libc_cv_forced_unwind=yes
+	fi
+
+	myconf+=(
+		--without-cvs
+		--disable-werror
+		--enable-bind-now
+		--build=${CBUILD_OPT:-${CBUILD}}
+		--host=${CTARGET_OPT:-${CTARGET}}
+		$(use_enable profile)
+		$(use_with gd)
+		--with-headers=$(alt_build_headers)
+		--prefix="${EPREFIX}/usr"
+		--sysconfdir="${EPREFIX}/etc"
+		--localstatedir="${EPREFIX}/var"
+		--libdir='$(prefix)'/$(get_libdir)
+		--mandir='$(prefix)'/share/man
+		--infodir='$(prefix)'/share/info
+		--libexecdir='$(libdir)'/misc/glibc
+		--with-bugurl=http://bugs.gentoo.org/
+		--with-pkgversion="$(glibc_banner)"
+		$(use_multiarch || echo --disable-multi-arch)
+		$(in_iuse rpc && use_enable rpc obsolete-rpc || echo --enable-obsolete-rpc)
+		$(in_iuse systemtap && use_enable systemtap)
+		$(in_iuse nscd && use_enable nscd)
+		${EXTRA_ECONF}
+	)
+
+	# We rely on sys-libs/timezone-data for timezone tools normally.
+	if version_is_at_least 2.23 ; then
+		myconf+=( $(use_enable vanilla timezone-tools) )
+	fi
+
+	# These libs don't have configure flags.
+	ac_cv_lib_audit_audit_log_user_avc_message=$(in_iuse audit && usex audit || echo no)
+	ac_cv_lib_cap_cap_init=$(in_iuse caps && usex caps || echo no)
+
+	# There is no configure option for this and we need to export it
+	# since the glibc build will re-run configure on itself
+	export libc_cv_rootsbindir="${EPREFIX}/sbin"
+	export libc_cv_slibdir="${EPREFIX}/$(get_libdir)"
+
+	# We take care of patching our binutils to use both hash styles,
+	# and many people like to force gnu hash style only, so disable
+	# this overriding check.  #347761
+	export libc_cv_hashstyle=no
+
+	# Overtime, generating info pages can be painful.  So disable this for
+	# versions older than the latest stable to avoid the issue (this ver
+	# should be updated from time to time).  #464394 #465816
+	if ! version_is_at_least 2.17 ; then
+		export ac_cv_prog_MAKEINFO=:
+	fi
+
+	local builddir=$(builddir "$1")
+	mkdir -p "${builddir}"
+	cd "${builddir}"
+	set -- "${S}"/configure "${myconf[@]}"
+	echo "$@"
+	"$@" || die "failed to configure glibc"
+
+	# ia64 static cross-compilers are a pita in so much that they
+	# can't produce static ELFs (as the libgcc.a is broken).  so
+	# disable building of the programs for those targets if it
+	# doesn't work.
+	# XXX: We could turn this into a compiler test, but ia64 is
+	# the only one that matters, so this should be fine for now.
+	if is_crosscompile && [[ ${CTARGET} == ia64* ]] ; then
+		sed -i '1i+link-static = touch $@' config.make
+	fi
+
+	# If we're trying to migrate between ABI sets, we need
+	# to lie and use a local copy of gcc.  Like if the system
+	# is built with MULTILIB_ABIS="amd64 x86" but we want to
+	# add x32 to it, gcc/glibc don't yet support x32.
+	if [[ -n ${GCC_BOOTSTRAP_VER} ]] && use multilib ; then
+		echo 'main(){}' > "${T}"/test.c
+		if ! $(tc-getCC ${CTARGET}) ${CFLAGS} ${LDFLAGS} "${T}"/test.c -Wl,-emain -lgcc 2>/dev/null ; then
+			sed -i -e '/^CC = /s:$: -B$(objdir)/../'"gcc-${GCC_BOOTSTRAP_VER}/${ABI}:" config.make || die
+			mkdir -p sunrpc
+			cp $(which rpcgen) sunrpc/cross-rpcgen || die
+			touch -t 202001010101 sunrpc/cross-rpcgen || die
+		fi
+	fi
+}
+
+glibc_headers_configure() {
+	export ABI=default
+
+	local builddir=$(builddir "headers")
+	mkdir -p "${builddir}"
+	cd "${builddir}"
+
+	# if we don't have a compiler yet, we can't really test it now ...
+	# hopefully they don't affect header generation, so let's hope for
+	# the best here ...
+	local v vars=(
+		ac_cv_header_cpuid_h=yes
+		libc_cv_{386,390,alpha,arm,hppa,ia64,mips,{powerpc,sparc}{,32,64},sh,x86_64}_tls=yes
+		libc_cv_asm_cfi_directives=yes
+		libc_cv_broken_visibility_attribute=no
+		libc_cv_c_cleanup=yes
+		libc_cv_forced_unwind=yes
+		libc_cv_gcc___thread=yes
+		libc_cv_mlong_double_128=yes
+		libc_cv_mlong_double_128ibm=yes
+		libc_cv_ppc_machine=yes
+		libc_cv_ppc_rel16=yes
+		libc_cv_predef_fortify_source=no
+		libc_cv_visibility_attribute=yes
+		libc_cv_z_combreloc=yes
+		libc_cv_z_execstack=yes
+		libc_cv_z_initfirst=yes
+		libc_cv_z_nodelete=yes
+		libc_cv_z_nodlopen=yes
+		libc_cv_z_relro=yes
+		libc_mips_abi=${ABI}
+		libc_mips_float=$([[ $(tc-is-softfloat) == "yes" ]] && echo soft || echo hard)
+		# These libs don't have configure flags.
+		ac_cv_lib_audit_audit_log_user_avc_message=no
+		ac_cv_lib_cap_cap_init=no
+	)
+	if ! version_is_at_least 2.25 ; then
+		vars+=(
+			libc_cv_predef_stack_protector=no
+		)
+	fi
+	einfo "Forcing cached settings:"
+	for v in "${vars[@]}" ; do
+		einfo " ${v}"
+		export ${v}
+	done
+
+	# Blow away some random CC settings that screw things up. #550192
+	if [[ -d ${S}/sysdeps/mips ]]; then
+		pushd "${S}"/sysdeps/mips >/dev/null
+		sed -i -e '/^CC +=/s:=.*:= -D_MIPS_SZPTR=32:' mips32/Makefile mips64/n32/Makefile || die
+		sed -i -e '/^CC +=/s:=.*:= -D_MIPS_SZPTR=64:' mips64/n64/Makefile || die
+		if version_is_at_least 2.21 ; then
+			# Force the mips ABI to the default.  This is OK because the set of
+			# installed headers in this phase is the same between the 3 ABIs.
+			# If this ever changes, this hack will break, but that's unlikely
+			# as glibc discourages that behavior.
+			# https://crbug.com/647033
+			sed -i -e 's:abiflag=.*:abiflag=_ABIO32:' preconfigure || die
+		fi
+		popd >/dev/null
+	fi
+
+	local myconf=()
+	myconf+=(
+		--disable-sanity-checks
+		--enable-hacker-mode
+		--without-cvs
+		--disable-werror
+		--enable-bind-now
+		--build=${CBUILD_OPT:-${CBUILD}}
+		--host=${CTARGET_OPT:-${CTARGET}}
+		--with-headers=$(alt_build_headers)
+		--prefix="${EPREFIX}/usr"
+		${EXTRA_ECONF}
+	)
+
+	local addons
+	[[ -d ${S}/ports ]] && addons+=",ports"
+	# Newer versions require nptl, so there is no addon for it.
+	version_is_at_least 2.20 || addons+=",nptl"
+	myconf+=( --enable-add-ons="${addons#,}" )
+
+	# Nothing is compiled here which would affect the headers for the target.
+	# So forcing CC/CFLAGS is sane.
+	set -- "${S}"/configure "${myconf[@]}"
+	echo "$@"
+	CC="$(tc-getBUILD_CC)" \
+	CFLAGS="-O1 -pipe" \
+	CPPFLAGS="-U_FORTIFY_SOURCE" \
+	LDFLAGS="" \
+	"$@" || die "failed to configure glibc"
+}
+
+do_src_configure() {
+	if just_headers ; then
+		glibc_headers_configure
+	else
+		want_linuxthreads && glibc_do_configure linuxthreads
+		want_nptl && glibc_do_configure nptl
+	fi
+}
+
+src_configure() {
+	foreach_abi do_src_configure
+}
+
+do_src_compile() {
+	local t
+	for t in linuxthreads nptl ; do
+		if want_${t} ; then
+			emake -C "$(builddir ${t})" || die "make ${t} for ${ABI} failed"
+		fi
+	done
+}
+
+src_compile() {
+	if just_headers ; then
+		return
+	fi
+
+	foreach_abi do_src_compile
+}
+
+glibc_src_test() {
+	cd "$(builddir $1)"
+	nonfatal emake -j1 check && return 0
+	einfo "make check failed - re-running with --keep-going to get the rest of the results"
+	nonfatal emake -j1 -k check
+	ewarn "make check failed for ${ABI}-${CTARGET}-$1"
+	return 1
+}
+
+glibc_do_src_test() {
+	local ret=0 t
+	for t in linuxthreads nptl ; do
+		if want_${t} ; then
+			glibc_src_test ${t}
+			: $(( ret |= $? ))
+		fi
+	done
+	return ${ret}
+}
+
+src_test() {
+	# Give tests more time to complete.
+	export TIMEOUTFACTOR=5
+
+	foreach_abi toolchain-glibc_do_src_test || die "tests failed"
+}
+
+glibc_do_src_install() {
+	local builddir=$(builddir $(want_linuxthreads && echo linuxthreads || echo nptl))
+	cd "${builddir}"
+
+	emake install_root="${D}$(alt_prefix)" install || die
+
+	if want_linuxthreads && want_nptl ; then
+		einfo "Installing NPTL to $(alt_libdir)/tls/..."
+		cd "$(builddir nptl)"
+		dodir $(alt_libdir)/tls $(alt_usrlibdir)/nptl
+
+		local l src_lib
+		for l in libc libm librt libpthread libthread_db ; do
+			# take care of shared lib first ...
+			l=${l}.so
+			if [[ -e ${l} ]] ; then
+				src_lib=${l}
+			else
+				src_lib=$(eval echo */${l})
+			fi
+			cp -a ${src_lib} "${ED}"$(alt_libdir)/tls/${l} || die "copying nptl ${l}"
+			fperms a+rx $(alt_libdir)/tls/${l}
+			dosym ${l} $(alt_libdir)/tls/$(scanelf -qSF'%S#F' ${src_lib})
+
+			# then grab the linker script or the symlink ...
+			if [[ -L ${ED}$(alt_usrlibdir)/${l} ]] ; then
+				dosym $(alt_libdir)/tls/${l} $(alt_usrlibdir)/nptl/${l}
+			else
+				sed \
+					-e "s:/${l}:/tls/${l}:g" \
+					-e "s:/${l/%.so/_nonshared.a}:/nptl/${l/%.so/_nonshared.a}:g" \
+					"${ED}"$(alt_usrlibdir)/${l} > "${ED}"$(alt_usrlibdir)/nptl/${l}
+			fi
+
+			# then grab the static lib ...
+			src_lib=${src_lib/%.so/.a}
+			[[ ! -e ${src_lib} ]] && src_lib=${src_lib/%.a/_pic.a}
+			cp -a ${src_lib} "${ED}"$(alt_usrlibdir)/nptl/ || die "copying nptl ${src_lib}"
+			src_lib=${src_lib/%.a/_nonshared.a}
+			if [[ -e ${src_lib} ]] ; then
+				cp -a ${src_lib} "${ED}"$(alt_usrlibdir)/nptl/ || die "copying nptl ${src_lib}"
+			fi
+		done
+
+		# use the nptl linker instead of the linuxthreads one as the linuxthreads
+		# one may lack TLS support and that can be really bad for business
+		cp -a elf/ld.so "${ED}"$(alt_libdir)/$(scanelf -qSF'%S#F' elf/ld.so) || die "copying nptl interp"
+	fi
+
+	# Normally real_pv is ${PV}. Live ebuilds are exception, there we need
+	# to infer upstream version:
+	# '#define VERSION "2.26.90"' -> '2.26.90'
+	local upstream_pv=$(sed -n -r 's/#define VERSION "(.*)"/\1/p' "${S}"/version.h)
+	# Newer versions get fancy with libm linkage to include vectorized support.
+	# While we don't really need a ldscript here, portage QA checks get upset.
+	if [[ -e ${ED}$(alt_usrlibdir)/libm-${upstream_pv}.a ]] ; then
+		dosym ../../$(get_libdir)/libm-${upstream_pv}.so $(alt_usrlibdir)/libm-${upstream_pv}.so
+	fi
+
+	# We'll take care of the cache ourselves
+	rm -f "${ED}"/etc/ld.so.cache
+
+	# Everything past this point just needs to be done once ...
+	is_final_abi || return 0
+
+	# Make sure the non-native interp can be found on multilib systems even
+	# if the main library set isn't installed into the right place.  Maybe
+	# we should query the active gcc for info instead of hardcoding it ?
+	local i ldso_abi ldso_name
+	local ldso_abi_list=(
+		# x86
+		amd64   /lib64/ld-linux-x86-64.so.2
+		x32     /libx32/ld-linux-x32.so.2
+		x86     /lib/ld-linux.so.2
+		# mips
+		o32     /lib/ld.so.1
+		n32     /lib32/ld.so.1
+		n64     /lib64/ld.so.1
+		# powerpc
+		ppc     /lib/ld.so.1
+		ppc64   /lib64/ld64.so.1
+		# s390
+		s390    /lib/ld.so.1
+		s390x   /lib/ld64.so.1
+		# sparc
+		sparc32 /lib/ld-linux.so.2
+		sparc64 /lib64/ld-linux.so.2
+	)
+	case $(tc-endian) in
+	little)
+		ldso_abi_list+=(
+			# arm
+			arm64   /lib/ld-linux-aarch64.so.1
+		)
+		;;
+	big)
+		ldso_abi_list+=(
+			# arm
+			arm64   /lib/ld-linux-aarch64_be.so.1
+		)
+		;;
+	esac
+	if [[ ${SYMLINK_LIB} == "yes" ]] && [[ ! -e ${ED}/$(alt_prefix)/lib ]] ; then
+		dosym $(get_abi_LIBDIR ${DEFAULT_ABI}) $(alt_prefix)/lib
+	fi
+	for (( i = 0; i < ${#ldso_abi_list[@]}; i += 2 )) ; do
+		ldso_abi=${ldso_abi_list[i]}
+		has ${ldso_abi} $(get_install_abis) || continue
+
+		ldso_name="$(alt_prefix)${ldso_abi_list[i+1]}"
+		if [[ ! -L ${ED}/${ldso_name} && ! -e ${ED}/${ldso_name} ]] ; then
+			dosym ../$(get_abi_LIBDIR ${ldso_abi})/${ldso_name##*/} ${ldso_name}
+		fi
+	done
+
+	# With devpts under Linux mounted properly, we do not need the pt_chown
+	# binary to be setuid.  This is because the default owners/perms will be
+	# exactly what we want.
+	if in_iuse suid && ! use suid ; then
+		find "${ED}" -name pt_chown -exec chmod -s {} +
+	fi
+
+	#################################################################
+	# EVERYTHING AFTER THIS POINT IS FOR NATIVE GLIBC INSTALLS ONLY #
+	# Make sure we install some symlink hacks so that when we build
+	# a 2nd stage cross-compiler, gcc finds the target system
+	# headers correctly.  See gcc/doc/gccinstall.info
+	if is_crosscompile ; then
+		# We need to make sure that /lib and /usr/lib always exists.
+		# gcc likes to use relative paths to get to its multilibs like
+		# /usr/lib/../lib64/.  So while we don't install any files into
+		# /usr/lib/, we do need it to exist.
+		cd "${ED}"$(alt_libdir)/..
+		[[ -e lib ]] || mkdir lib
+		cd "${ED}"$(alt_usrlibdir)/..
+		[[ -e lib ]] || mkdir lib
+
+		dosym usr/include $(alt_prefix)/sys-include
+		return 0
+	fi
+
+	# Files for Debian-style locale updating
+	dodir /usr/share/i18n
+	sed \
+		-e "/^#/d" \
+		-e "/SUPPORTED-LOCALES=/d" \
+		-e "s: \\\\::g" -e "s:/: :g" \
+		"${S}"/localedata/SUPPORTED > "${ED}"/usr/share/i18n/SUPPORTED \
+		|| die "generating /usr/share/i18n/SUPPORTED failed"
+	cd "${WORKDIR}"/extra/locale
+	dosbin locale-gen || die
+	doman *.[0-8]
+	insinto /etc
+	doins locale.gen || die
+
+	# Make sure all the ABI's can find the locales and so we only
+	# have to generate one set
+	local a
+	keepdir /usr/$(get_libdir)/locale
+	for a in $(get_install_abis) ; do
+		if [[ ! -e ${ED}/usr/$(get_abi_LIBDIR ${a})/locale ]] ; then
+			dosym /usr/$(get_libdir)/locale /usr/$(get_abi_LIBDIR ${a})/locale
+		fi
+	done
+
+	cd "${S}"
+
+	# Install misc network config files
+	insinto /etc
+	doins nscd/nscd.conf posix/gai.conf nss/nsswitch.conf || die
+	doins "${WORKDIR}"/extra/etc/*.conf || die
+
+	if ! in_iuse nscd || use nscd ; then
+		doinitd "${WORKDIR}"/extra/etc/nscd || die
+
+		local nscd_args=(
+			-e "s:@PIDFILE@:$(strings "${ED}"/usr/sbin/nscd | grep nscd.pid):"
+		)
+		version_is_at_least 2.16 || nscd_args+=( -e 's: --foreground : :' )
+		sed -i "${nscd_args[@]}" "${ED}"/etc/init.d/nscd
+
+		# Newer versions of glibc include the nscd.service themselves.
+		# TODO: Drop the $FILESDIR copy once 2.19 goes stable.
+		if version_is_at_least 2.19 ; then
+			systemd_dounit nscd/nscd.service || die
+			systemd_newtmpfilesd nscd/nscd.tmpfiles nscd.conf || die
+		else
+			systemd_dounit "${FILESDIR}"/nscd.service || die
+			systemd_newtmpfilesd "${FILESDIR}"/nscd.tmpfilesd nscd.conf || die
+		fi
+	else
+		# Do this since extra/etc/*.conf above might have nscd.conf.
+		rm -f "${ED}"/etc/nscd.conf
+	fi
+
+	echo 'LDPATH="include ld.so.conf.d/*.conf"' > "${T}"/00glibc
+	doenvd "${T}"/00glibc || die
+
+	for d in BUGS ChangeLog* CONFORMANCE FAQ NEWS NOTES PROJECTS README* ; do
+		[[ -s ${d} ]] && dodoc ${d}
+	done
+
+	# Prevent overwriting of the /etc/localtime symlink.  We'll handle the
+	# creation of the "factory" symlink in pkg_postinst().
+	rm -f "${ED}"/etc/localtime
+}
+
+glibc_headers_install() {
+	local builddir=$(builddir "headers")
+	cd "${builddir}"
+	emake install_root="${D}$(alt_prefix)" install-headers || die
+	if ! version_is_at_least 2.16 ; then
+		insinto $(alt_headers)/bits
+		doins bits/stdio_lim.h || die
+	fi
+	insinto $(alt_headers)/gnu
+	doins "${S}"/include/gnu/stubs.h || die "doins include gnu"
+	# Make sure we install the sys-include symlink so that when
+	# we build a 2nd stage cross-compiler, gcc finds the target
+	# system headers correctly.  See gcc/doc/gccinstall.info
+	dosym usr/include $(alt_prefix)/sys-include
+}
+
+src_install() {
+	if just_headers ; then
+		export ABI=default
+		glibc_headers_install
+		return
+	fi
+
+	foreach_abi glibc_do_src_install
+	src_strip
+}
+
+pkg_preinst() {
+	# nothing to do if just installing headers
+	just_headers && return
+
+	# prepare /etc/ld.so.conf.d/ for files
+	mkdir -p "${EROOT}"/etc/ld.so.conf.d
+
+	# Default /etc/hosts.conf:multi to on for systems with small dbs.
+	if [[ $(wc -l < "${EROOT}"/etc/hosts) -lt 1000 ]] ; then
+		sed -i '/^multi off/s:off:on:' "${ED}"/etc/host.conf
+		elog "Defaulting /etc/host.conf:multi to on"
+	fi
+
+	[[ ${ROOT} != "/" ]] && return 0
+	[[ -d ${ED}/$(get_libdir) ]] || return 0
+	[[ -z ${BOOTSTRAP_RAP} ]] && glibc_sanity_check
+}
+
+pkg_postinst() {
+	# nothing to do if just installing headers
+	just_headers && return
+
+	if ! tc-is-cross-compiler && [[ -x ${EROOT}/usr/sbin/iconvconfig ]] ; then
+		# Generate fastloading iconv module configuration file.
+		"${EROOT}"/usr/sbin/iconvconfig --prefix="${ROOT}"
+	fi
+
+	if ! is_crosscompile && [[ ${ROOT} == "/" ]] ; then
+		# Reload init ... if in a chroot or a diff init package, ignore
+		# errors from this step #253697
+		/sbin/telinit U 2>/dev/null
+
+		# if the host locales.gen contains no entries, we'll install everything
+		local locale_list="${EROOT}etc/locale.gen"
+		if [[ -z $(locale-gen --list --config "${locale_list}") ]] ; then
+			ewarn "Generating all locales; edit /etc/locale.gen to save time/space"
+			locale_list="${EROOT}usr/share/i18n/SUPPORTED"
+		fi
+		locale-gen -j $(makeopts_jobs) --config "${locale_list}"
+	fi
+}
-- 
2.26.2