[gentoo-commits] repo/gentoo:master commit in: sys-libs/uclibc-ng/, sys-libs/uclibc-ng/files/

["Anthony G. Basile" <blueness@gentoo.org>]

commit:     6714d08e2f90e2d372ba4e6571d96dd6b653a764
Author:     Anthony G. Basile <blueness <AT> gentoo <DOT> org>
AuthorDate: Wed Apr 13 00:05:45 2016 +0000
Commit:     Anthony G. Basile <blueness <AT> gentoo <DOT> org>
CommitDate: Wed Apr 13 00:05:45 2016 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=6714d08e

sys-libs/uclibc-ng: initial commit

Package-Manager: portage-2.2.26

 sys-libs/uclibc-ng/Manifest                  |   1 +
 sys-libs/uclibc-ng/files/uclibc-compat.patch |  12 +
 sys-libs/uclibc-ng/metadata.xml              |  20 ++
 sys-libs/uclibc-ng/uclibc-ng-1.0.13.ebuild   | 403 +++++++++++++++++++++++++++
 sys-libs/uclibc-ng/uclibc-ng-9999.ebuild     | 403 +++++++++++++++++++++++++++
 5 files changed, 839 insertions(+)

diff --git a/sys-libs/uclibc-ng/Manifest b/sys-libs/uclibc-ng/Manifest
new file mode 100644
index 0000000..9bef84b
--- /dev/null
+++ b/sys-libs/uclibc-ng/Manifest
@@ -0,0 +1 @@
+DIST uClibc-ng-1.0.13.tar.bz2 2950676 SHA256 2d3530fa9321022db30c4576b272d8113efb75393f9b43281bd3b014c75bd2d4 SHA512 aae994d06119756161b9a38eeb8b4a0b8531dfaf13094158218cce2500cd02dcac9067160a5a2764d355e1208ee7cda04f4c1ddf7f6812c794f4680c938e9b22 WHIRLPOOL e612f9a152335c9b89fe6e10dcab0ad44978c205da8230597f3ff3b8adee81a95a71dfcec36afc9c0c262fa56d643de47a705840e841363a13b0af2fee686653

diff --git a/sys-libs/uclibc-ng/files/uclibc-compat.patch b/sys-libs/uclibc-ng/files/uclibc-compat.patch
new file mode 100644
index 0000000..5827756
--- /dev/null
+++ b/sys-libs/uclibc-ng/files/uclibc-compat.patch
@@ -0,0 +1,12 @@
+diff -Naur uClibc-ng-1.0.13.orig/ldso/ldso/Makefile.in uClibc-ng-1.0.13/ldso/ldso/Makefile.in
+--- uClibc-ng-1.0.13.orig/ldso/ldso/Makefile.in	2016-03-13 21:48:40.000000000 +0000
++++ uClibc-ng-1.0.13/ldso/ldso/Makefile.in	2016-04-08 13:45:06.837079637 +0000
+@@ -76,8 +76,6 @@
+ $(ldso:.$(ABI_VERSION)=): | $(top_builddir)lib
+ $(ldso:.$(ABI_VERSION)=): $($(UCLIBC_LDSO_NAME)_OUT)/$(UCLIBC_LDSO_NAME)_so.a
+ 	$(call link.so,$(ldso_FULL_NAME),$(ABI_VERSION))
+-	# link for backward compatibility
+-	(cd $(top_builddir)lib; ln -sf $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION) $(UCLIBC_LDSO_NAME).so.0 )
+ 
+ $($(UCLIBC_LDSO_NAME)_OUT)/$(UCLIBC_LDSO_NAME)_so.a: $(ldso-y)
+ 	$(Q)$(RM) $@

diff --git a/sys-libs/uclibc-ng/metadata.xml b/sys-libs/uclibc-ng/metadata.xml
new file mode 100644
index 0000000..1e21008
--- /dev/null
+++ b/sys-libs/uclibc-ng/metadata.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>blueness@gentoo.org</email>
+		<name>Anthony G. Basile</name>
+	</maintainer>
+	<maintainer type="project">
+		<email>embedded@gentoo.org</email>
+		<name>Embedded Gentoo</name>
+	</maintainer>
+	<longdescription>
+	uClibc-ng is a small C library for developing embedded Linux systems. It is much
+	smaller than the GNU C Library, but nearly all applications supported by glibc
+	also work perfectly with uClibc-ng. 
+	</longdescription>
+	<use>
+		<flag name="rpc">Enable sun nis/rpc support (you should use libtirpc though)</flag>
+	</use>
+</pkgmetadata>

diff --git a/sys-libs/uclibc-ng/uclibc-ng-1.0.13.ebuild b/sys-libs/uclibc-ng/uclibc-ng-1.0.13.ebuild
new file mode 100644
index 0000000..aec3523
--- /dev/null
+++ b/sys-libs/uclibc-ng/uclibc-ng-1.0.13.ebuild
@@ -0,0 +1,403 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI="6"
+
+inherit flag-o-matic multilib savedconfig toolchain-funcs versionator
+
+if [[ ${PV} == "9999" ]] ; then
+	EGIT_REPO_URI="git://uclibc-ng.org/git/uclibc-ng"
+	inherit git-r3
+	MY_P=uclibc-ng-${PV}
+else
+	MY_P=uClibc-ng-${PV}
+fi
+
+DESCRIPTION="C library for developing embedded Linux systems"
+HOMEPAGE="http://www.uclibc.org/"
+if [[ ${PV} != "9999" ]] ; then
+	PATCH_VER=""
+	SRC_URI="http://downloads.uclibc-ng.org/releases/${PV}/${MY_P}.tar.bz2"
+	KEYWORDS="-* ~amd64 ~arm ~mips ~ppc ~x86"
+fi
+
+LICENSE="LGPL-2"
+SLOT="0"
+IUSE="debug hardened iconv ipv6 rpc crosscompile_opts_headers-only"
+RESTRICT="strip"
+
+# 1) We can't upgrade from uclibc to uclibc-ng via a soft blocker since portage
+#    will delete the ld.so sym link prematurely and break the system. So we
+#    will hard block and give manual migration instructions.
+# 2) Currently uclibc and uclibc-ng's iconv are in bad shape.  We've been using
+#    the breakout library.  The disadvantage here is that we have to sprinkle
+#    LDFAGS=-liconv on build systems that need to link against libiconv.
+RDEPEND="
+	!!sys-libs/uclibc
+	iconv? ( dev-libs/libiconv )"
+
+S=${WORKDIR}/${MY_P}
+
+export CBUILD=${CBUILD:-${CHOST}}
+export CTARGET=${CTARGET:-${CHOST}}
+if [[ ${CHOST} == ${CTARGET} ]] ; then
+	if [[ ${CATEGORY} == cross-* ]] ; then
+		export CTARGET=${CATEGORY#cross-}
+	fi
+fi
+
+is_crosscompile() {
+	[[ ${CHOST} != ${CTARGET} ]]
+}
+
+alt_build_kprefix() {
+	if [[ ${CBUILD} == ${CHOST} && ${CHOST} == ${CTARGET} ]] ; then
+		echo /usr/include
+	else
+		echo /usr/${CTARGET}/usr/include
+	fi
+}
+
+just_headers() {
+	use crosscompile_opts_headers-only && is_crosscompile
+}
+
+uclibc_endian() {
+	# XXX: this wont work for a toolchain which is bi-endian, but we
+	#      dont have any such thing at the moment, so not a big deal
+	touch "${T}"/endian.s
+	$(tc-getAS ${CTARGET}) "${T}"/endian.s -o "${T}"/endian.o
+	case $(file "${T}"/endian.o) in
+		*" MSB "*) echo "BIG";;
+		*" LSB "*) echo "LITTLE";;
+		*)         echo "NFC";;
+	esac
+	rm -f "${T}"/endian.{s,o}
+}
+
+kconfig_q_opt() {
+	local flag=$1; shift
+	case ${flag} in
+		y|n) ;;
+		*) flag=$(usex ${flag} y n) ;;
+	esac
+
+	local var="defs_${flag}"
+	eval "${var}+=( $* )"
+}
+
+get_opt() {
+	(
+	unset ${1}
+	. ${2:-"${S}"/.config}
+	echo ${!1}
+	)
+}
+
+make_oldconfig() {
+	yes "" 2>/dev/null | emake -s oldconfig >/dev/null
+}
+
+make_config() {
+	restore_config .config
+	if [ -f .config ]; then
+		make_oldconfig
+		return 0
+	else
+		ewarn "Could not locate user configfile, so we will save a default one"
+	fi
+
+	emake ARCH=$1 defconfig >/dev/null
+
+	local defs_{y,n}
+
+	# These are forced off
+	defs_n=(
+		DOASSERTS
+		DODEBUG_PT
+		HAS_NO_THREADS
+		PROPOLICE_BLOCK_ABRT
+		SSP_QUICK_CANARY
+		SUPPORT_LD_DEBUG_EARLY
+		UCLIBC_HAS_CTYPE_UNSAFE
+		UCLIBC_HAS_LOCALE
+		UCLIBC_HAS_SSP_COMPAT
+	)
+
+	# These are forced on
+	defs_y=(
+		COMPAT_ATEXIT
+		DO_C99_MATH
+		DO_XSI_MATH
+		FORCE_SHAREABLE_TEXT_SEGMENTS
+		LDSO_GNU_HASH_SUPPORT
+		LDSO_PRELINK_SUPPORT
+		LDSO_PRELOAD_FILE_SUPPORT
+		LDSO_RUNPATH_OF_EXECUTABLE
+		LDSO_STANDALONE_SUPPORT
+		MALLOC_GLIBC_COMPAT
+		PROPOLICE_BLOCK_SEGV
+		PTHREADS_DEBUG_SUPPORT
+		UCLIBC_HAS_ARC4RANDOM
+		UCLIBC_HAS_BACKTRACE
+		UCLIBC_HAS_BSD_RES_CLOSE
+		UCLIBC_HAS_CONTEXT_FUNCS
+		UCLIBC_HAS_CTYPE_CHECKED
+		UCLIBC_HAS_EXTRA_COMPAT_RES_STATE
+		UCLIBC_HAS_FENV
+		UCLIBC_HAS_FOPEN_CLOSEEXEC_MODE
+		UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE
+		UCLIBC_HAS_FOPEN_LARGEFILE_MODE
+		UCLIBC_HAS_FTS
+		UCLIBC_HAS_FTW
+		UCLIBC_HAS_GETPT
+		UCLIBC_HAS_GLIBC_CUSTOM_PRINTF
+		UCLIBC_HAS_GLIBC_CUSTOM_STREAMS
+		UCLIBC_HAS_GNU_GLOB
+		UCLIBC_HAS_HEXADECIMAL_FLOATS
+		UCLIBC_HAS_LIBNSL_STUB
+		UCLIBC_HAS_LIBRESOLV_STUB
+		UCLIBC_HAS_LIBUTIL
+		UCLIBC_HAS_NFTW
+		UCLIBC_HAS_OBSOLETE_BSD_SIGNAL
+		UCLIBC_HAS_OBSTACK
+		UCLIBC_HAS_PRINTF_M_SPEC
+		UCLIBC_HAS_PROGRAM_INVOCATION_NAME
+		UCLIBC_HAS_RESOLVER_SUPPORT
+		UCLIBC_HAS_SHA256_CRYPT_IMPL
+		UCLIBC_HAS_SHA512_CRYPT_IMPL
+		UCLIBC_HAS_SSP
+		UCLIBC_HAS_STUBS
+		UCLIBC_HAS_SYS_ERRLIST
+		UCLIBC_HAS_SYS_SIGLIST
+		UCLIBC_HAS_THREADS_NATIVE
+		UCLIBC_HAS_TZ_FILE_READ_MANY
+		UCLIBC_HAS_UTMP
+		UCLIBC_HAS_UTMPX
+		UCLIBC_HAS_WCHAR
+		UCLIBC_HAS_WORDEXP
+		UCLIBC_NTP_LEGACY
+		UCLIBC_SUPPORT_AI_ADDRCONFIG
+		UCLIBC_SUSV2_LEGACY
+		UCLIBC_SUSV3_LEGACY
+		UCLIBC_SUSV3_LEGACY_MACROS
+		UCLIBC_SUSV4_LEGACY
+		UCLIBC_USE_NETLINK
+	)
+
+	sed -i -e '/ARCH_.*_ENDIAN/d' .config
+	kconfig_q_opt y "ARCH_WANTS_$(uclibc_endian)_ENDIAN"
+
+	kconfig_q_opt debug DODEBUG
+	kconfig_q_opt debug SUPPORT_LD_DEBUG
+	kconfig_q_opt debug UCLIBC_HAS_PROFILING
+
+	kconfig_q_opt ipv6 UCLIBC_HAS_IPV6
+
+	kconfig_q_opt rpc UCLIBC_HAS_RPC
+	kconfig_q_opt rpc UCLIBC_HAS_FULL_RPC
+	kconfig_q_opt rpc UCLIBC_HAS_REENTRANT_RPC
+
+	kconfig_q_opt hardened UCLIBC_BUILD_NOEXECSTACK
+	kconfig_q_opt hardened UCLIBC_BUILD_NOW
+	kconfig_q_opt hardened UCLIBC_BUILD_PIE
+	kconfig_q_opt hardened UCLIBC_BUILD_RELRO
+	kconfig_q_opt hardened UCLIBC_BUILD_SSP
+
+	local count def
+	for count in 1 2 ; do
+		# Run twice as some config opts depend on others being enabled first.
+		for def in ${defs_y[@]} ; do
+			sed -i -e "s|.*\<${def}\>.*set|${def}=y|g" .config
+		done
+		for def in ${defs_n[@]} ; do
+			sed -i -e "s|${def}=y|# ${def} is not set|g" .config
+		done
+		make_oldconfig
+	done
+
+	einfo "Enabled options:"
+	for def in ${defs_y[@]} ; do
+		einfo " " $(grep "^${def}=y" .config || echo "could not find ${def}")
+	done
+	einfo "Disabled options:"
+	for def in ${defs_n[@]} ; do
+		einfo " " $(grep "^# ${def} is not set" .config || echo "could not find ${def}")
+	done
+
+	# setup build and run paths
+	sed -i \
+		-e "/^CROSS_COMPILER_PREFIX/s|=.*|=\"${CTARGET}-\"|" \
+		-e "/^KERNEL_HEADERS/s|=.*|=\"$(alt_build_kprefix)\"|" \
+		-e "/^SHARED_LIB_LOADER_PREFIX/s|=.*|=\"/$(get_libdir)\"|" \
+		-e "/^DEVEL_PREFIX/s|=.*|=\"/usr\"|" \
+		-e "/^RUNTIME_PREFIX/s|=.*|=\"/\"|" \
+		-e "/^UCLIBC_EXTRA_CFLAGS/s|=.*|=\"${UCLIBC_EXTRA_CFLAGS}\"|" \
+		.config || die
+
+	make_oldconfig
+}
+
+pkg_setup() {
+	# Make sure our CHOST is a uclibc toolchain for native compiling
+	if [[ ${CHOST} == ${CTARGET} ]]; then
+		case ${CHOST} in
+			*-uclinux*|*-uclibc*) ;;
+			*) die "Use sys-devel/crossdev to build a uclibc toolchain" ;;
+		esac
+	fi
+
+	# uClibc-ng doesn't carry old Linux threads, and since we force
+	# threading our only choice is NPTL which requires i486 and later.
+	[[ ${CTARGET} == i386* ]] && die "i386 can't support Native Posix Threads (NPTL)."
+}
+
+src_prepare() {
+	local version subversion
+
+	# uclibc-ng tries to create a two sym link with ld.so,
+	# ld-uClibc.so.{0,MAJOR_VERSION} -> ld-uClibc-<version>.so
+	# where MAJOR_VERSION != 0 indicates the ABI verison.
+	# We want to get rid of this and just have ABI = 0.
+	eapply "${FILESDIR}"/uclibc-compat.patch
+
+	# We need to change the major.minor.sublevel of uclibc-ng.
+	# Upstream sets MAJOR_VERSION = 1 which breaks runtime linking.
+	# If we really want the ABI bump, we'll have to hack the gcc
+	# spec file and change the '*link:' rule.
+	version=( $(get_version_components) )
+	if [[ -z ${version[1]} ]]; then
+		subversion=0
+	else
+		if [[ -z ${version[2]} ]]; then
+			subversion=${version[1]}
+		else
+			subversion=${version[1]}.${version[2]}
+		fi
+	fi
+
+	sed -i \
+		-e "/^MAJOR_VERSION/s|:=.*|:= 0|" \
+		-e "/^MINOR_VERSION/s|:=.*|:= ${version[0]}|" \
+		-e "/^SUBLEVEL/s|:=.*|:= ${subversion}|" \
+		Rules.mak || die
+
+	eapply_user
+}
+
+src_configure() {
+	# Map our toolchain arch name to the name expected by uClibc-ng.
+	local target=$(tc-arch)
+	case ${target} in
+		amd64) target="x86_64";;
+		arm)   target="arm";;
+		mips)  target="mips";;
+		ppc)   target="powerpc";;
+		x86)   target="i386";;
+	esac
+
+	# Do arch specific configuration by changing the defaults in
+	# extra/Configs/Config.<arch>.  If these are not overridden
+	# by an save .config, they will be selected by default.
+
+	# For i386, i486, i586 and i686
+	local cpu
+	if [[ ${target} == "i386" ]]; then
+		[[ ${CTARGET} == i[456]86* ]] && cpu="${CTARGET:1:1}86"
+		sed -i -e "s|default CONFIG_686|default CONFIG_${cpu:-486}|" \
+			extra/Configs/Config.i385 || die
+	fi
+
+	# For arm
+	if [[ ${target} == "arm" ]]; then
+		sed -i -e '/Build for EABI/a \\tdefault y' extra/Configs/Config.arm
+	fi
+
+	# For mips
+	if [[ ${target} == "mips" ]]; then
+		sed -i -e "s|default CONFIG_MIPS_O32_ABI|CONFIG_MIPS_${ABI^[on]}_ABI|" \
+			extra/Configs/Config.mips || die
+	fi
+
+	# We set HOSTCC to the proper tuple rather than just 'gcc'
+	sed -i -e "s|^HOSTCC.*=.*|HOSTCC=$(tc-getBUILD_CC)|" Rules.mak
+
+	make_config ${target}
+
+	einfo
+	einfo "Runtime Prefix: /"
+	einfo "Devel Prefix:   /usr"
+	einfo "Kernel Prefix:  $(alt_build_kprefix)"
+	einfo "CBUILD:         ${CBUILD}"
+	einfo "CHOST:          ${CHOST}"
+	einfo "CTARGET:        ${CTARGET}"
+	einfo "ABI:            ${ABI}"
+	einfo "ENDIAN:         $(uclibc_endian)"
+	einfo
+}
+
+src_compile() {
+	emake headers
+	just_headers && return 0
+
+	emake
+	if is_crosscompile ; then
+		emake -C utils hostutils
+	else
+		emake utils
+	fi
+}
+
+src_test() {
+	is_crosscompile && return 0
+
+	# assert test fails on pax/grsec enabled kernels
+	# normal vfork test fails in sandbox (both glibc/uclibc)
+	emake UCLIBC_ONLY=1 check
+}
+
+src_install() {
+	local sysroot=${D}
+	is_crosscompile && sysroot+="/usr/${CTARGET}"
+
+	local target="install"
+	just_headers && target="install_headers"
+	emake DESTDIR="${sysroot}" ${target}
+
+	save_config .config
+
+	# remove files coming from kernel-headers
+	rm -rf "${sysroot}"/usr/include/{linux,asm*}
+
+	# 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
+	if is_crosscompile ; then
+		dosym usr/include /usr/${CTARGET}/sys-include
+		if ! just_headers && [[ -n $(get_opt HAVE_SHARED) ]] ; then
+			newbin utils/ldconfig.host ${CTARGET}-ldconfig
+			newbin utils/ldd.host ${CTARGET}-ldd
+		fi
+		return 0
+	fi
+
+	emake DESTDIR="${D}" install_utils
+	dobin extra/scripts/getent
+	dodoc README docs/*.txt
+}
+
+pkg_postinst() {
+	is_crosscompile && return 0
+
+	if [ ! -e "${ROOT}"/etc/TZ ] ; then
+		ewarn "Please remember to set your timezone in /etc/TZ"
+		mkdir -p "${ROOT}"/etc
+		echo "UTC" > "${ROOT}"/etc/TZ
+	fi
+	[ "${ROOT}" != "/" ] && return 0
+	# update cache before reloading init
+	ldconfig
+	# reload init ...
+	/sbin/telinit U 2>/dev/null
+}

diff --git a/sys-libs/uclibc-ng/uclibc-ng-9999.ebuild b/sys-libs/uclibc-ng/uclibc-ng-9999.ebuild
new file mode 100644
index 0000000..aec3523
--- /dev/null
+++ b/sys-libs/uclibc-ng/uclibc-ng-9999.ebuild
@@ -0,0 +1,403 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI="6"
+
+inherit flag-o-matic multilib savedconfig toolchain-funcs versionator
+
+if [[ ${PV} == "9999" ]] ; then
+	EGIT_REPO_URI="git://uclibc-ng.org/git/uclibc-ng"
+	inherit git-r3
+	MY_P=uclibc-ng-${PV}
+else
+	MY_P=uClibc-ng-${PV}
+fi
+
+DESCRIPTION="C library for developing embedded Linux systems"
+HOMEPAGE="http://www.uclibc.org/"
+if [[ ${PV} != "9999" ]] ; then
+	PATCH_VER=""
+	SRC_URI="http://downloads.uclibc-ng.org/releases/${PV}/${MY_P}.tar.bz2"
+	KEYWORDS="-* ~amd64 ~arm ~mips ~ppc ~x86"
+fi
+
+LICENSE="LGPL-2"
+SLOT="0"
+IUSE="debug hardened iconv ipv6 rpc crosscompile_opts_headers-only"
+RESTRICT="strip"
+
+# 1) We can't upgrade from uclibc to uclibc-ng via a soft blocker since portage
+#    will delete the ld.so sym link prematurely and break the system. So we
+#    will hard block and give manual migration instructions.
+# 2) Currently uclibc and uclibc-ng's iconv are in bad shape.  We've been using
+#    the breakout library.  The disadvantage here is that we have to sprinkle
+#    LDFAGS=-liconv on build systems that need to link against libiconv.
+RDEPEND="
+	!!sys-libs/uclibc
+	iconv? ( dev-libs/libiconv )"
+
+S=${WORKDIR}/${MY_P}
+
+export CBUILD=${CBUILD:-${CHOST}}
+export CTARGET=${CTARGET:-${CHOST}}
+if [[ ${CHOST} == ${CTARGET} ]] ; then
+	if [[ ${CATEGORY} == cross-* ]] ; then
+		export CTARGET=${CATEGORY#cross-}
+	fi
+fi
+
+is_crosscompile() {
+	[[ ${CHOST} != ${CTARGET} ]]
+}
+
+alt_build_kprefix() {
+	if [[ ${CBUILD} == ${CHOST} && ${CHOST} == ${CTARGET} ]] ; then
+		echo /usr/include
+	else
+		echo /usr/${CTARGET}/usr/include
+	fi
+}
+
+just_headers() {
+	use crosscompile_opts_headers-only && is_crosscompile
+}
+
+uclibc_endian() {
+	# XXX: this wont work for a toolchain which is bi-endian, but we
+	#      dont have any such thing at the moment, so not a big deal
+	touch "${T}"/endian.s
+	$(tc-getAS ${CTARGET}) "${T}"/endian.s -o "${T}"/endian.o
+	case $(file "${T}"/endian.o) in
+		*" MSB "*) echo "BIG";;
+		*" LSB "*) echo "LITTLE";;
+		*)         echo "NFC";;
+	esac
+	rm -f "${T}"/endian.{s,o}
+}
+
+kconfig_q_opt() {
+	local flag=$1; shift
+	case ${flag} in
+		y|n) ;;
+		*) flag=$(usex ${flag} y n) ;;
+	esac
+
+	local var="defs_${flag}"
+	eval "${var}+=( $* )"
+}
+
+get_opt() {
+	(
+	unset ${1}
+	. ${2:-"${S}"/.config}
+	echo ${!1}
+	)
+}
+
+make_oldconfig() {
+	yes "" 2>/dev/null | emake -s oldconfig >/dev/null
+}
+
+make_config() {
+	restore_config .config
+	if [ -f .config ]; then
+		make_oldconfig
+		return 0
+	else
+		ewarn "Could not locate user configfile, so we will save a default one"
+	fi
+
+	emake ARCH=$1 defconfig >/dev/null
+
+	local defs_{y,n}
+
+	# These are forced off
+	defs_n=(
+		DOASSERTS
+		DODEBUG_PT
+		HAS_NO_THREADS
+		PROPOLICE_BLOCK_ABRT
+		SSP_QUICK_CANARY
+		SUPPORT_LD_DEBUG_EARLY
+		UCLIBC_HAS_CTYPE_UNSAFE
+		UCLIBC_HAS_LOCALE
+		UCLIBC_HAS_SSP_COMPAT
+	)
+
+	# These are forced on
+	defs_y=(
+		COMPAT_ATEXIT
+		DO_C99_MATH
+		DO_XSI_MATH
+		FORCE_SHAREABLE_TEXT_SEGMENTS
+		LDSO_GNU_HASH_SUPPORT
+		LDSO_PRELINK_SUPPORT
+		LDSO_PRELOAD_FILE_SUPPORT
+		LDSO_RUNPATH_OF_EXECUTABLE
+		LDSO_STANDALONE_SUPPORT
+		MALLOC_GLIBC_COMPAT
+		PROPOLICE_BLOCK_SEGV
+		PTHREADS_DEBUG_SUPPORT
+		UCLIBC_HAS_ARC4RANDOM
+		UCLIBC_HAS_BACKTRACE
+		UCLIBC_HAS_BSD_RES_CLOSE
+		UCLIBC_HAS_CONTEXT_FUNCS
+		UCLIBC_HAS_CTYPE_CHECKED
+		UCLIBC_HAS_EXTRA_COMPAT_RES_STATE
+		UCLIBC_HAS_FENV
+		UCLIBC_HAS_FOPEN_CLOSEEXEC_MODE
+		UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE
+		UCLIBC_HAS_FOPEN_LARGEFILE_MODE
+		UCLIBC_HAS_FTS
+		UCLIBC_HAS_FTW
+		UCLIBC_HAS_GETPT
+		UCLIBC_HAS_GLIBC_CUSTOM_PRINTF
+		UCLIBC_HAS_GLIBC_CUSTOM_STREAMS
+		UCLIBC_HAS_GNU_GLOB
+		UCLIBC_HAS_HEXADECIMAL_FLOATS
+		UCLIBC_HAS_LIBNSL_STUB
+		UCLIBC_HAS_LIBRESOLV_STUB
+		UCLIBC_HAS_LIBUTIL
+		UCLIBC_HAS_NFTW
+		UCLIBC_HAS_OBSOLETE_BSD_SIGNAL
+		UCLIBC_HAS_OBSTACK
+		UCLIBC_HAS_PRINTF_M_SPEC
+		UCLIBC_HAS_PROGRAM_INVOCATION_NAME
+		UCLIBC_HAS_RESOLVER_SUPPORT
+		UCLIBC_HAS_SHA256_CRYPT_IMPL
+		UCLIBC_HAS_SHA512_CRYPT_IMPL
+		UCLIBC_HAS_SSP
+		UCLIBC_HAS_STUBS
+		UCLIBC_HAS_SYS_ERRLIST
+		UCLIBC_HAS_SYS_SIGLIST
+		UCLIBC_HAS_THREADS_NATIVE
+		UCLIBC_HAS_TZ_FILE_READ_MANY
+		UCLIBC_HAS_UTMP
+		UCLIBC_HAS_UTMPX
+		UCLIBC_HAS_WCHAR
+		UCLIBC_HAS_WORDEXP
+		UCLIBC_NTP_LEGACY
+		UCLIBC_SUPPORT_AI_ADDRCONFIG
+		UCLIBC_SUSV2_LEGACY
+		UCLIBC_SUSV3_LEGACY
+		UCLIBC_SUSV3_LEGACY_MACROS
+		UCLIBC_SUSV4_LEGACY
+		UCLIBC_USE_NETLINK
+	)
+
+	sed -i -e '/ARCH_.*_ENDIAN/d' .config
+	kconfig_q_opt y "ARCH_WANTS_$(uclibc_endian)_ENDIAN"
+
+	kconfig_q_opt debug DODEBUG
+	kconfig_q_opt debug SUPPORT_LD_DEBUG
+	kconfig_q_opt debug UCLIBC_HAS_PROFILING
+
+	kconfig_q_opt ipv6 UCLIBC_HAS_IPV6
+
+	kconfig_q_opt rpc UCLIBC_HAS_RPC
+	kconfig_q_opt rpc UCLIBC_HAS_FULL_RPC
+	kconfig_q_opt rpc UCLIBC_HAS_REENTRANT_RPC
+
+	kconfig_q_opt hardened UCLIBC_BUILD_NOEXECSTACK
+	kconfig_q_opt hardened UCLIBC_BUILD_NOW
+	kconfig_q_opt hardened UCLIBC_BUILD_PIE
+	kconfig_q_opt hardened UCLIBC_BUILD_RELRO
+	kconfig_q_opt hardened UCLIBC_BUILD_SSP
+
+	local count def
+	for count in 1 2 ; do
+		# Run twice as some config opts depend on others being enabled first.
+		for def in ${defs_y[@]} ; do
+			sed -i -e "s|.*\<${def}\>.*set|${def}=y|g" .config
+		done
+		for def in ${defs_n[@]} ; do
+			sed -i -e "s|${def}=y|# ${def} is not set|g" .config
+		done
+		make_oldconfig
+	done
+
+	einfo "Enabled options:"
+	for def in ${defs_y[@]} ; do
+		einfo " " $(grep "^${def}=y" .config || echo "could not find ${def}")
+	done
+	einfo "Disabled options:"
+	for def in ${defs_n[@]} ; do
+		einfo " " $(grep "^# ${def} is not set" .config || echo "could not find ${def}")
+	done
+
+	# setup build and run paths
+	sed -i \
+		-e "/^CROSS_COMPILER_PREFIX/s|=.*|=\"${CTARGET}-\"|" \
+		-e "/^KERNEL_HEADERS/s|=.*|=\"$(alt_build_kprefix)\"|" \
+		-e "/^SHARED_LIB_LOADER_PREFIX/s|=.*|=\"/$(get_libdir)\"|" \
+		-e "/^DEVEL_PREFIX/s|=.*|=\"/usr\"|" \
+		-e "/^RUNTIME_PREFIX/s|=.*|=\"/\"|" \
+		-e "/^UCLIBC_EXTRA_CFLAGS/s|=.*|=\"${UCLIBC_EXTRA_CFLAGS}\"|" \
+		.config || die
+
+	make_oldconfig
+}
+
+pkg_setup() {
+	# Make sure our CHOST is a uclibc toolchain for native compiling
+	if [[ ${CHOST} == ${CTARGET} ]]; then
+		case ${CHOST} in
+			*-uclinux*|*-uclibc*) ;;
+			*) die "Use sys-devel/crossdev to build a uclibc toolchain" ;;
+		esac
+	fi
+
+	# uClibc-ng doesn't carry old Linux threads, and since we force
+	# threading our only choice is NPTL which requires i486 and later.
+	[[ ${CTARGET} == i386* ]] && die "i386 can't support Native Posix Threads (NPTL)."
+}
+
+src_prepare() {
+	local version subversion
+
+	# uclibc-ng tries to create a two sym link with ld.so,
+	# ld-uClibc.so.{0,MAJOR_VERSION} -> ld-uClibc-<version>.so
+	# where MAJOR_VERSION != 0 indicates the ABI verison.
+	# We want to get rid of this and just have ABI = 0.
+	eapply "${FILESDIR}"/uclibc-compat.patch
+
+	# We need to change the major.minor.sublevel of uclibc-ng.
+	# Upstream sets MAJOR_VERSION = 1 which breaks runtime linking.
+	# If we really want the ABI bump, we'll have to hack the gcc
+	# spec file and change the '*link:' rule.
+	version=( $(get_version_components) )
+	if [[ -z ${version[1]} ]]; then
+		subversion=0
+	else
+		if [[ -z ${version[2]} ]]; then
+			subversion=${version[1]}
+		else
+			subversion=${version[1]}.${version[2]}
+		fi
+	fi
+
+	sed -i \
+		-e "/^MAJOR_VERSION/s|:=.*|:= 0|" \
+		-e "/^MINOR_VERSION/s|:=.*|:= ${version[0]}|" \
+		-e "/^SUBLEVEL/s|:=.*|:= ${subversion}|" \
+		Rules.mak || die
+
+	eapply_user
+}
+
+src_configure() {
+	# Map our toolchain arch name to the name expected by uClibc-ng.
+	local target=$(tc-arch)
+	case ${target} in
+		amd64) target="x86_64";;
+		arm)   target="arm";;
+		mips)  target="mips";;
+		ppc)   target="powerpc";;
+		x86)   target="i386";;
+	esac
+
+	# Do arch specific configuration by changing the defaults in
+	# extra/Configs/Config.<arch>.  If these are not overridden
+	# by an save .config, they will be selected by default.
+
+	# For i386, i486, i586 and i686
+	local cpu
+	if [[ ${target} == "i386" ]]; then
+		[[ ${CTARGET} == i[456]86* ]] && cpu="${CTARGET:1:1}86"
+		sed -i -e "s|default CONFIG_686|default CONFIG_${cpu:-486}|" \
+			extra/Configs/Config.i385 || die
+	fi
+
+	# For arm
+	if [[ ${target} == "arm" ]]; then
+		sed -i -e '/Build for EABI/a \\tdefault y' extra/Configs/Config.arm
+	fi
+
+	# For mips
+	if [[ ${target} == "mips" ]]; then
+		sed -i -e "s|default CONFIG_MIPS_O32_ABI|CONFIG_MIPS_${ABI^[on]}_ABI|" \
+			extra/Configs/Config.mips || die
+	fi
+
+	# We set HOSTCC to the proper tuple rather than just 'gcc'
+	sed -i -e "s|^HOSTCC.*=.*|HOSTCC=$(tc-getBUILD_CC)|" Rules.mak
+
+	make_config ${target}
+
+	einfo
+	einfo "Runtime Prefix: /"
+	einfo "Devel Prefix:   /usr"
+	einfo "Kernel Prefix:  $(alt_build_kprefix)"
+	einfo "CBUILD:         ${CBUILD}"
+	einfo "CHOST:          ${CHOST}"
+	einfo "CTARGET:        ${CTARGET}"
+	einfo "ABI:            ${ABI}"
+	einfo "ENDIAN:         $(uclibc_endian)"
+	einfo
+}
+
+src_compile() {
+	emake headers
+	just_headers && return 0
+
+	emake
+	if is_crosscompile ; then
+		emake -C utils hostutils
+	else
+		emake utils
+	fi
+}
+
+src_test() {
+	is_crosscompile && return 0
+
+	# assert test fails on pax/grsec enabled kernels
+	# normal vfork test fails in sandbox (both glibc/uclibc)
+	emake UCLIBC_ONLY=1 check
+}
+
+src_install() {
+	local sysroot=${D}
+	is_crosscompile && sysroot+="/usr/${CTARGET}"
+
+	local target="install"
+	just_headers && target="install_headers"
+	emake DESTDIR="${sysroot}" ${target}
+
+	save_config .config
+
+	# remove files coming from kernel-headers
+	rm -rf "${sysroot}"/usr/include/{linux,asm*}
+
+	# 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
+	if is_crosscompile ; then
+		dosym usr/include /usr/${CTARGET}/sys-include
+		if ! just_headers && [[ -n $(get_opt HAVE_SHARED) ]] ; then
+			newbin utils/ldconfig.host ${CTARGET}-ldconfig
+			newbin utils/ldd.host ${CTARGET}-ldd
+		fi
+		return 0
+	fi
+
+	emake DESTDIR="${D}" install_utils
+	dobin extra/scripts/getent
+	dodoc README docs/*.txt
+}
+
+pkg_postinst() {
+	is_crosscompile && return 0
+
+	if [ ! -e "${ROOT}"/etc/TZ ] ; then
+		ewarn "Please remember to set your timezone in /etc/TZ"
+		mkdir -p "${ROOT}"/etc
+		echo "UTC" > "${ROOT}"/etc/TZ
+	fi
+	[ "${ROOT}" != "/" ] && return 0
+	# update cache before reloading init
+	ldconfig
+	# reload init ...
+	/sbin/telinit U 2>/dev/null
+}