--- /dev/null
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=5
+
+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) )}"
+
+src_unpack() {
+ [[ -n ${GCC_BOOTSTRAP_VER} ]] && use multilib && unpack gcc-${GCC_BOOTSTRAP_VER}-multilib-bootstrap.tar.bz2
+
+ toolchain-glibc_src_unpack
+}
+
+src_prepare() {
+ toolchain-glibc_src_prepare
+
+ 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
+}
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