sys-devel/binutils-apple/binutils-apple-6.1.ebuild - platform/external/gentoo/overlays/gentoo - Git at Google

 # Copyright 1999-2015 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Id$

 EAPI="3"

 inherit eutils flag-o-matic toolchain-funcs

 LD64=ld64-241.9
 CCTOOLS_VERSION=862
 CCTOOLS=cctools-${CCTOOLS_VERSION}
 LIBUNWIND=libunwind-35.3
 DYLD=dyld-353.2.1

 DESCRIPTION="Darwin assembler as(1) and static linker ld(1), Xcode Tools ${PV}"
 HOMEPAGE="http://www.opensource.apple.com/darwinsource/"
 SRC_URI="http://www.opensource.apple.com/tarballs/ld64/${LD64}.tar.gz
 	http://www.opensource.apple.com/tarballs/cctools/${CCTOOLS}.tar.gz
 	http://www.opensource.apple.com/tarballs/dyld/${DYLD}.tar.gz
 	http://www.opensource.apple.com/tarballs/libunwind/${LIBUNWIND}.tar.gz"

 LICENSE="APSL-2"
 KEYWORDS="~x64-macos ~x86-macos"
 IUSE="lto test libcxx"

 RDEPEND="sys-devel/binutils-config
 	lto? ( sys-devel/llvm )
 	libcxx? ( sys-libs/libcxx )"
 DEPEND="${RDEPEND}
 	test? ( >=dev-lang/perl-5.8.8 )
 	|| ( >=sys-devel/gcc-apple-4.2.1 sys-devel/llvm )
 	libcxx? ( sys-devel/llvm )"

 export CTARGET=${CTARGET:-${CHOST}}
 if [[ ${CTARGET} == ${CHOST} ]] ; then
 	if [[ ${CATEGORY} == cross-* ]] ; then
 		export CTARGET=${CATEGORY#cross-}
 	fi
 fi
 is_cross() { [[ ${CHOST} != ${CTARGET} ]] ; }

 if is_cross ; then
 	SLOT="${CTARGET}-6"
 else
 	SLOT="6"
 fi

 LIBPATH=/usr/$(get_libdir)/binutils/${CTARGET}/${PV}
 INCPATH=${LIBPATH}/include
 DATAPATH=/usr/share/binutils-data/${CTARGET}/${PV}
 if is_cross ; then
 	BINPATH=/usr/${CHOST}/${CTARGET}/binutils-bin/${PV}
 else
 	BINPATH=/usr/${CTARGET}/binutils-bin/${PV}
 fi

 S=${WORKDIR}

 src_prepare() {
 	cd "${S}"/${LD64}/src
 	cp "${FILESDIR}"/ld64-136-compile_stubs.h ld/compile_stubs.h
 	cp "${FILESDIR}"/ld64-236.3-Makefile Makefile

 	epatch "${FILESDIR}"/ld64-236.3-nolto.patch
 	epatch "${FILESDIR}"/ld64-241.9-extraneous-includes.patch
 	epatch "${FILESDIR}"/ld64-241.9-atomic-volatile.patch
 	epatch "${FILESDIR}"/ld64-241.9-arm64-cputype.patch
 	epatch "${FILESDIR}"/ld64-236.3-crashreporter.patch
 	epatch "${FILESDIR}"/ld64-241.9-gcc.patch
 	epatch "${FILESDIR}"/ld64-236.3-constant-types.patch
 	epatch "${FILESDIR}"/ld64-241.9-nosnapshots.patch
 	epatch "${FILESDIR}"/ld64-241.9-noarm.patch
 	epatch "${FILESDIR}"/ld64-241.9-register-names.patch
 	epatch "${FILESDIR}"/ld64-241.9-get-comm-align.patch
 	epatch "${FILESDIR}"/ld64-241.9-cc_md5.patch
 	epatch "${FILESDIR}"/ld64-241.9-lto-noremarks.patch

 	# We used to use our own copy of lto.h, which doesn't require llvm
 	# build-env. Current versions of llvm provide
 	# $EPREFIX/usr/include/llvm-c/lto.h as well as
 	# $EPREFIX/usr/lib/libLTO.{so,dylib}, so we just use these.

 	# provide missing headers from libunwind and dyld
 	mkdir -p include/{mach,mach-o/arm} || die
 	# never present because it's private
 	cp ../../${DYLD}/include/mach-o/dyld_priv.h include/mach-o || die
 	# missing on <= 10.5
 	cp ../../${LIBUNWIND}/include/libunwind.h include/ || die
 	cp ../../${LIBUNWIND}/include/mach-o/compact_unwind_encoding.h include/mach-o || die
 	# missing on <= 10.4
 	cp ../../${DYLD}/include/mach-o/dyld_images.h include/mach-o || die
 	cp ../../${CCTOOLS}/include/mach-o/loader.h include/mach-o || die
 	# use copies from cctools because they're otherwise hidden in some SDK
 	cp ../../${CCTOOLS}/include/mach-o/arm/reloc.h include/mach-o/arm || die
 	# provide all required CPU_TYPEs on all platforms
 	cp ../../${CCTOOLS}/include/mach/machine.h include/mach/machine.h
 	# add alias for newer identifiers, because ld64 uses both but cctools
 	# header only defines the older
 	epatch "${FILESDIR}"/ld64-236.3-missing-cputypes.patch

 	# mimic OS X Leopard-style Availability.h macros for libunwind.h on
 	# older systems
 	[[ ${CHOST} == *darwin* && ${CHOST#*-darwin} -le 8 ]] && \
 		echo "#define __OSX_AVAILABLE_STARTING(x,y)  " > include/Availability.h

 	local VER_STR="\"@(#)PROGRAM:ld  PROJECT:${LD64} (Gentoo ${PN}-${PVR})\\n\""
 	echo "char ldVersionString[] = ${VER_STR};" > version.cpp

 	epatch "${FILESDIR}"/ld64-123.2-debug-backtrace.patch

 	cd "${S}"/${CCTOOLS}
 	epatch "${FILESDIR}"/${PN}-4.5-as.patch
 	epatch "${FILESDIR}"/${PN}-5.1-as-dir.patch
 	epatch "${FILESDIR}"/${PN}-5.1-ranlib.patch
 	epatch "${FILESDIR}"/${PN}-3.1.1-libtool-ranlib.patch
 	epatch "${FILESDIR}"/${PN}-3.1.1-no-headers.patch
 	epatch "${FILESDIR}"/${PN}-4.0-no-oss-dir.patch
 	epatch "${FILESDIR}"/${PN}-5.1-nolto.patch
 	epatch "${FILESDIR}"/cctools-839-intel-retf.patch
 	epatch "${FILESDIR}"/${PN}-5.1-extraneous-includes.patch
 	epatch "${FILESDIR}"/${PN}-5.1-otool-stdc.patch
 	epatch "${FILESDIR}"/${PN}-5.1-constant-types.patch
 	epatch "${FILESDIR}"/${PN}-5.1-strnlen.patch
 	cp ../${LD64}/src/other/prune_trie.h include/mach-o/ || die

 	# do not build profileable libstuff to save compile time
 	sed -i -e "/^all:/s, profile , ," libstuff/Makefile

 	# cctools version is provided to make via RC_ProjectSourceVersion which
 	# generates and compiles it as apple_version[] into libstuff. From
 	# there it's picked up by the individual tools. Since
 	# RC_ProjectSourceVersion is also used as library version, we can't
 	# just append our local version info. So we hack the libstuff Makefile
 	# to include our Gentoo version.
 	sed -i -e "/cctools-.*(RC_ProjectSourceVersion).*OFILE_DIR/s,Version),Version) (Gentoo ${PN}-${PVR})," \
 		libstuff/Makefile

 	# clean up test suite
 	cd "${S}"/${LD64}/unit-tests/test-cases
 	local c

 	# we don't have llvm
 	((++c)); rm -rf llvm-integration;

 	# we don't have dtrace
 	((++c)); rm -rf dtrace-static-probes-coalescing;
 	((++c)); rm -rf dtrace-static-probes;

 	# a file is missing
 	((++c)); rm -rf eh-coalescing-r

 	# we don't do universal binaries
 	((++c)); rm -rf blank-stubs;

 	# looks like a problem with apple's result-filter.pl
 	((++c)); rm -rf implicit-common3;
 	((++c)); rm -rf order_file-ans;

 	# TODO no idea what goes wrong here
 	((++c)); rm -rf dwarf-debug-notes;

 	einfo "Deleted $c tests that were bound to fail"

 	cd "${S}"
 	ebegin "cleaning Makefiles from unwanted CFLAGS"
 	find . -name "Makefile" -print0 | xargs -0 sed \
 		-i \
 		-e 's/ -g / /g' \
 		-e 's/^G =.*$/G =/' \
 		-e 's/^OFLAG =.*$/OFLAG =/' \
 		-e 's/install -c -s/install/g'
 	eend $?
 }

 src_configure() {
 	CCTOOLS_LTO=
 	LD64_LTO=0
 	if use lto ; then
 		CCTOOLS_LTO="-DLTO_SUPPORT"
 		LD64_LTO=1
 	fi

 	if [ "${CXX/*clang*/yes}" = "yes" ] ; then
 		if use libcxx ; then
 			append-cxxflags -stdlib=libc++
 			CXXLIB=-stdlib=libc++
 		else
 			# force libstdc++ for systems where libc++ is default (OS X 10.9+?)
 			append-cxxflags -stdlib=libstdc++
 			CXXLIB=-stdlib=libstdc++
 		fi
 	else
 		use libcxx && \
 			ewarn "libcxx only available with clang and your C++ compiler ($CXX) does not seem to be clang"
 	fi

 	# CPPFLAGS only affects ld64, cctools don't use 'em (which currently is
 	# what we want)
 	append-cppflags -DNDEBUG

 	# Block API and thus snapshots supported on >= 10.6
 	[[ ${CHOST} == *darwin* && ${CHOST#*-darwin} -ge 10 ]] && \
 		append-cppflags -DSUPPORT_SNAPSHOTS

 	CCTOOLS_OFLAG=
 	if [[ ${CHOST} == *darwin* && ${CHOST#*-darwin} -le 8 ]] ; then
 		# cctools expect to use UNIX03 struct member names.
 		# This is default on > 10.4. Activate it on <= 10.4 by defining
 		# __DARWIN_UNIX03 explicitly.
 		CCTOOLS_OFLAG="-D__DARWIN_UNIX03=1"
 	fi

 	# Create configure.h for ld64 with SUPPORT_ARCH_<arch> defines in it.
 	# RC_SUPPORTED_ARCHS="i386 x86_64 x86_64h armv6 ..." can be used to
 	# override architectures (there are more arms to add) but we configure
 	# with the default to be in line with Xcode's ld.
 	DERIVED_FILE_DIR=${LD64}/src \
 		RC_SUPPORTED_ARCHS="" \
 		${LD64}/src/create_configure
 }

 compile_ld64() {
 	einfo "building ${LD64}"
 	cd "${S}"/${LD64}/src
 	emake \
 		LTO=${LD64_LTO} \
 		|| die "emake failed for ld64"
 	use test && emake build_test
 }

 compile_cctools() {
 	einfo "building ${CCTOOLS}"
 	cd "${S}"/${CCTOOLS}
 	# -j1 because it fails too often with weird errors
 	# Suppress running dsymutil because it will warn about missing debug
 	# info which is expected when compiling without -g as we normally do.
 	# This might need some more thought if anyone ever wanted to build us
 	# for debugging with Apple's tools.
 	emake \
 		LIB_PRUNETRIE="-L../../${LD64}/src -lprunetrie" \
 		EFITOOLS= \
 		LTO="${CCTOOLS_LTO}" \
 		COMMON_SUBDIRS='libstuff ar misc otool' \
 		SUBDIRS_32= \
 		LEGACY= \
 		RC_ProjectSourceVersion=${CCTOOLS_VERSION} \
 		RC_CFLAGS="${CFLAGS}" \
 		OFLAG="${CCTOOLS_OFLAG}" \
 		CXXLIB="${CXXLIB}" \
 		DSYMUTIL=": disabled: dsymutil" \
 		-j1 \
 		|| die "emake failed for the cctools"
 	cd "${S}"/${CCTOOLS}/as
 	emake \
 		BUILD_OBSOLETE_ARCH= \
 		RC_ProjectSourceVersion=${CCTOOLS_VERSION} \
 		RC_CFLAGS="-DASLIBEXECDIR=\"\\\"${EPREFIX}${LIBPATH}/\\\"\" ${CFLAGS}" \
 		OFLAG="${CCTOOLS_OFLAG}" \
 		DSYMUTIL=": disabled: dsymutil" \
 		|| die "emake failed for as"
 }

 src_compile() {
 	compile_ld64
 	compile_cctools
 }

 install_ld64() {
 	exeinto ${BINPATH}
 	doexe "${S}"/${LD64}/src/{ld64,rebase,dyldinfo,unwinddump,ObjectDump}
 	dosym ld64 ${BINPATH}/ld
 	insinto ${DATAPATH}/man/man1
 	doins "${S}"/${LD64}/doc/man/man1/{ld,ld64,rebase}.1
 }

 install_cctools() {
 	cd "${S}"/${CCTOOLS}
 	emake install_all_but_headers \
 		EFITOOLS= \
 		COMMON_SUBDIRS='ar misc otool' \
 		SUBDIRS_32= \
 		DSTROOT=\"${D}\" \
 		BINDIR=\"${EPREFIX}\"${BINPATH} \
 		LOCBINDIR=\"${EPREFIX}\"${BINPATH} \
 		USRBINDIR=\"${EPREFIX}\"${BINPATH} \
 		LOCLIBDIR=\"${EPREFIX}\"${LIBPATH} \
 		MANDIR=\"${EPREFIX}\"${DATAPATH}/man/
 	cd "${S}"/${CCTOOLS}/as
 	emake install \
 		BUILD_OBSOLETE_ARCH= \
 		DSTROOT=\"${D}\" \
 		USRBINDIR=\"${EPREFIX}\"${BINPATH} \
 		LIBDIR=\"${EPREFIX}\"${LIBPATH} \
 		LOCLIBDIR=\"${EPREFIX}\"${LIBPATH}

 	cd "${ED}"${BINPATH}
 	insinto ${DATAPATH}/man/man1
 	local skips manpage
 	# ar brings an up-to-date manpage with it
 	skips=( ar )
 	for bin in *; do
 		for skip in ${skips[@]}; do
 			if [[ ${bin} == ${skip} ]]; then
 				continue 2;
 			fi
 		done
 		manpage=${S}/${CCTOOLS}/man/${bin}.1
 		if [[ -f "${manpage}" ]]; then
 			doins "${manpage}"
 		fi
 	done
 	insinto ${DATAPATH}/man/man5
 	doins "${S}"/${CCTOOLS}/man/*.5
 }

 src_test() {
 	if ! [ "${EPREFIX}"/usr/bin/clang ] ; then
 		einfo "Test suite only works properly with clang - please install"
 		return
 	fi

 	einfo "Running unit tests"
 	cd "${S}"/${LD64}/unit-tests/test-cases
 	# provide the new ld as a symlink to clang so that -ccc-install-dir
 	# will pick it up
 	ln -sfn ../../src/ld64 ld
 	# use our arch command because the System's will report i386 even for an
 	# x86_64 prefix
 	perl ../bin/make-recursive.pl \
 		BUILT_PRODUCTS_DIR="${S}"/${LD64}/src \
 		ARCH="$(arch)" \
 		LD="${S}"/${LD64}/src/ld64 \
 		CC="clang -ccc-install-dir $PWD" \
 		CXX="clang++ -ccc-install-dir $PWD" \
 		OTOOL="${S}"/${CCTOOLS}/otool/otool.NEW \
 		| perl ../bin/result-filter.pl
 }

 src_install() {
 	install_ld64
 	install_cctools

 	cd "${S}"
 	insinto /etc/env.d/binutils
 	cat <<-EOF > env.d
 		TARGET="${CHOST}"
 		VER="${PV}"
 		FAKE_TARGETS="${CHOST}"
 	EOF
 	newins env.d ${CHOST}-${PV}
 }

 pkg_postinst() {
 	binutils-config ${CHOST}-${PV}
 }
	# Copyright 1999-2015 Gentoo Foundation
	# Distributed under the terms of the GNU General Public License v2
	# $Id$

	EAPI="3"

	inherit eutils flag-o-matic toolchain-funcs

	LD64=ld64-241.9
	CCTOOLS_VERSION=862
	CCTOOLS=cctools-${CCTOOLS_VERSION}
	LIBUNWIND=libunwind-35.3
	DYLD=dyld-353.2.1

	DESCRIPTION="Darwin assembler as(1) and static linker ld(1), Xcode Tools ${PV}"
	HOMEPAGE="http://www.opensource.apple.com/darwinsource/"
	SRC_URI="http://www.opensource.apple.com/tarballs/ld64/${LD64}.tar.gz
	http://www.opensource.apple.com/tarballs/cctools/${CCTOOLS}.tar.gz
	http://www.opensource.apple.com/tarballs/dyld/${DYLD}.tar.gz
	http://www.opensource.apple.com/tarballs/libunwind/${LIBUNWIND}.tar.gz"

	LICENSE="APSL-2"
	KEYWORDS="~x64-macos ~x86-macos"
	IUSE="lto test libcxx"

	RDEPEND="sys-devel/binutils-config
	lto? ( sys-devel/llvm )
	libcxx? ( sys-libs/libcxx )"
	DEPEND="${RDEPEND}
	test? ( >=dev-lang/perl-5.8.8 )
	\|\| ( >=sys-devel/gcc-apple-4.2.1 sys-devel/llvm )
	libcxx? ( sys-devel/llvm )"

	export CTARGET=${CTARGET:-${CHOST}}
	if [[ ${CTARGET} == ${CHOST} ]] ; then
	if [[ ${CATEGORY} == cross-* ]] ; then
	export CTARGET=${CATEGORY#cross-}
	fi
	fi
	is_cross() { [[ ${CHOST} != ${CTARGET} ]] ; }

	if is_cross ; then
	SLOT="${CTARGET}-6"
	else
	SLOT="6"
	fi

	LIBPATH=/usr/$(get_libdir)/binutils/${CTARGET}/${PV}
	INCPATH=${LIBPATH}/include
	DATAPATH=/usr/share/binutils-data/${CTARGET}/${PV}
	if is_cross ; then
	BINPATH=/usr/${CHOST}/${CTARGET}/binutils-bin/${PV}
	else
	BINPATH=/usr/${CTARGET}/binutils-bin/${PV}
	fi

	S=${WORKDIR}

	src_prepare() {
	cd "${S}"/${LD64}/src
	cp "${FILESDIR}"/ld64-136-compile_stubs.h ld/compile_stubs.h
	cp "${FILESDIR}"/ld64-236.3-Makefile Makefile

	epatch "${FILESDIR}"/ld64-236.3-nolto.patch
	epatch "${FILESDIR}"/ld64-241.9-extraneous-includes.patch
	epatch "${FILESDIR}"/ld64-241.9-atomic-volatile.patch
	epatch "${FILESDIR}"/ld64-241.9-arm64-cputype.patch
	epatch "${FILESDIR}"/ld64-236.3-crashreporter.patch
	epatch "${FILESDIR}"/ld64-241.9-gcc.patch
	epatch "${FILESDIR}"/ld64-236.3-constant-types.patch
	epatch "${FILESDIR}"/ld64-241.9-nosnapshots.patch
	epatch "${FILESDIR}"/ld64-241.9-noarm.patch
	epatch "${FILESDIR}"/ld64-241.9-register-names.patch
	epatch "${FILESDIR}"/ld64-241.9-get-comm-align.patch
	epatch "${FILESDIR}"/ld64-241.9-cc_md5.patch
	epatch "${FILESDIR}"/ld64-241.9-lto-noremarks.patch

	# We used to use our own copy of lto.h, which doesn't require llvm
	# build-env. Current versions of llvm provide
	# $EPREFIX/usr/include/llvm-c/lto.h as well as
	# $EPREFIX/usr/lib/libLTO.{so,dylib}, so we just use these.

	# provide missing headers from libunwind and dyld
	mkdir -p include/{mach,mach-o/arm} \|\| die
	# never present because it's private
	cp ../../${DYLD}/include/mach-o/dyld_priv.h include/mach-o \|\| die
	# missing on <= 10.5
	cp ../../${LIBUNWIND}/include/libunwind.h include/ \|\| die
	cp ../../${LIBUNWIND}/include/mach-o/compact_unwind_encoding.h include/mach-o \|\| die
	# missing on <= 10.4
	cp ../../${DYLD}/include/mach-o/dyld_images.h include/mach-o \|\| die
	cp ../../${CCTOOLS}/include/mach-o/loader.h include/mach-o \|\| die
	# use copies from cctools because they're otherwise hidden in some SDK
	cp ../../${CCTOOLS}/include/mach-o/arm/reloc.h include/mach-o/arm \|\| die
	# provide all required CPU_TYPEs on all platforms
	cp ../../${CCTOOLS}/include/mach/machine.h include/mach/machine.h
	# add alias for newer identifiers, because ld64 uses both but cctools
	# header only defines the older
	epatch "${FILESDIR}"/ld64-236.3-missing-cputypes.patch

	# mimic OS X Leopard-style Availability.h macros for libunwind.h on
	# older systems
	[[ ${CHOST} == darwin && ${CHOST#*-darwin} -le 8 ]] && \
	echo "#define __OSX_AVAILABLE_STARTING(x,y) " > include/Availability.h

	local VER_STR="\"@(#)PROGRAM:ld PROJECT:${LD64} (Gentoo ${PN}-${PVR})\\n\""
	echo "char ldVersionString[] = ${VER_STR};" > version.cpp

	epatch "${FILESDIR}"/ld64-123.2-debug-backtrace.patch

	cd "${S}"/${CCTOOLS}
	epatch "${FILESDIR}"/${PN}-4.5-as.patch
	epatch "${FILESDIR}"/${PN}-5.1-as-dir.patch
	epatch "${FILESDIR}"/${PN}-5.1-ranlib.patch
	epatch "${FILESDIR}"/${PN}-3.1.1-libtool-ranlib.patch
	epatch "${FILESDIR}"/${PN}-3.1.1-no-headers.patch
	epatch "${FILESDIR}"/${PN}-4.0-no-oss-dir.patch
	epatch "${FILESDIR}"/${PN}-5.1-nolto.patch
	epatch "${FILESDIR}"/cctools-839-intel-retf.patch
	epatch "${FILESDIR}"/${PN}-5.1-extraneous-includes.patch
	epatch "${FILESDIR}"/${PN}-5.1-otool-stdc.patch
	epatch "${FILESDIR}"/${PN}-5.1-constant-types.patch
	epatch "${FILESDIR}"/${PN}-5.1-strnlen.patch
	cp ../${LD64}/src/other/prune_trie.h include/mach-o/ \|\| die

	# do not build profileable libstuff to save compile time
	sed -i -e "/^all:/s, profile , ," libstuff/Makefile

	# cctools version is provided to make via RC_ProjectSourceVersion which
	# generates and compiles it as apple_version[] into libstuff. From
	# there it's picked up by the individual tools. Since
	# RC_ProjectSourceVersion is also used as library version, we can't
	# just append our local version info. So we hack the libstuff Makefile
	# to include our Gentoo version.
	sed -i -e "/cctools-.(RC_ProjectSourceVersion).OFILE_DIR/s,Version),Version) (Gentoo ${PN}-${PVR})," \
	libstuff/Makefile

	# clean up test suite
	cd "${S}"/${LD64}/unit-tests/test-cases
	local c

	# we don't have llvm
	((++c)); rm -rf llvm-integration;

	# we don't have dtrace
	((++c)); rm -rf dtrace-static-probes-coalescing;
	((++c)); rm -rf dtrace-static-probes;

	# a file is missing
	((++c)); rm -rf eh-coalescing-r

	# we don't do universal binaries
	((++c)); rm -rf blank-stubs;

	# looks like a problem with apple's result-filter.pl
	((++c)); rm -rf implicit-common3;
	((++c)); rm -rf order_file-ans;

	# TODO no idea what goes wrong here
	((++c)); rm -rf dwarf-debug-notes;

	einfo "Deleted $c tests that were bound to fail"

	cd "${S}"
	ebegin "cleaning Makefiles from unwanted CFLAGS"
	find . -name "Makefile" -print0 \| xargs -0 sed \
	-i \
	-e 's/ -g / /g' \
	-e 's/^G =.*$/G =/' \
	-e 's/^OFLAG =.*$/OFLAG =/' \
	-e 's/install -c -s/install/g'
	eend $?
	}

	src_configure() {
	CCTOOLS_LTO=
	LD64_LTO=0
	if use lto ; then
	CCTOOLS_LTO="-DLTO_SUPPORT"
	LD64_LTO=1
	fi

	if [ "${CXX/clang/yes}" = "yes" ] ; then
	if use libcxx ; then
	append-cxxflags -stdlib=libc++
	CXXLIB=-stdlib=libc++
	else
	# force libstdc++ for systems where libc++ is default (OS X 10.9+?)
	append-cxxflags -stdlib=libstdc++
	CXXLIB=-stdlib=libstdc++
	fi
	else
	use libcxx && \
	ewarn "libcxx only available with clang and your C++ compiler ($CXX) does not seem to be clang"
	fi

	# CPPFLAGS only affects ld64, cctools don't use 'em (which currently is
	# what we want)
	append-cppflags -DNDEBUG

	# Block API and thus snapshots supported on >= 10.6
	[[ ${CHOST} == darwin && ${CHOST#*-darwin} -ge 10 ]] && \
	append-cppflags -DSUPPORT_SNAPSHOTS

	CCTOOLS_OFLAG=
	if [[ ${CHOST} == darwin && ${CHOST#*-darwin} -le 8 ]] ; then
	# cctools expect to use UNIX03 struct member names.
	# This is default on > 10.4. Activate it on <= 10.4 by defining
	# __DARWIN_UNIX03 explicitly.
	CCTOOLS_OFLAG="-D__DARWIN_UNIX03=1"
	fi

	# Create configure.h for ld64 with SUPPORT_ARCH_<arch> defines in it.
	# RC_SUPPORTED_ARCHS="i386 x86_64 x86_64h armv6 ..." can be used to
	# override architectures (there are more arms to add) but we configure
	# with the default to be in line with Xcode's ld.
	DERIVED_FILE_DIR=${LD64}/src \
	RC_SUPPORTED_ARCHS="" \
	${LD64}/src/create_configure
	}

	compile_ld64() {
	einfo "building ${LD64}"
	cd "${S}"/${LD64}/src
	emake \
	LTO=${LD64_LTO} \
	\|\| die "emake failed for ld64"
	use test && emake build_test
	}

	compile_cctools() {
	einfo "building ${CCTOOLS}"
	cd "${S}"/${CCTOOLS}
	# -j1 because it fails too often with weird errors
	# Suppress running dsymutil because it will warn about missing debug
	# info which is expected when compiling without -g as we normally do.
	# This might need some more thought if anyone ever wanted to build us
	# for debugging with Apple's tools.
	emake \
	LIB_PRUNETRIE="-L../../${LD64}/src -lprunetrie" \
	EFITOOLS= \
	LTO="${CCTOOLS_LTO}" \
	COMMON_SUBDIRS='libstuff ar misc otool' \
	SUBDIRS_32= \
	LEGACY= \
	RC_ProjectSourceVersion=${CCTOOLS_VERSION} \
	RC_CFLAGS="${CFLAGS}" \
	OFLAG="${CCTOOLS_OFLAG}" \
	CXXLIB="${CXXLIB}" \
	DSYMUTIL=": disabled: dsymutil" \
	-j1 \
	\|\| die "emake failed for the cctools"
	cd "${S}"/${CCTOOLS}/as
	emake \
	BUILD_OBSOLETE_ARCH= \
	RC_ProjectSourceVersion=${CCTOOLS_VERSION} \
	RC_CFLAGS="-DASLIBEXECDIR=\"\\\"${EPREFIX}${LIBPATH}/\\\"\" ${CFLAGS}" \
	OFLAG="${CCTOOLS_OFLAG}" \
	DSYMUTIL=": disabled: dsymutil" \
	\|\| die "emake failed for as"
	}

	src_compile() {
	compile_ld64
	compile_cctools
	}

	install_ld64() {
	exeinto ${BINPATH}
	doexe "${S}"/${LD64}/src/{ld64,rebase,dyldinfo,unwinddump,ObjectDump}
	dosym ld64 ${BINPATH}/ld
	insinto ${DATAPATH}/man/man1
	doins "${S}"/${LD64}/doc/man/man1/{ld,ld64,rebase}.1
	}

	install_cctools() {
	cd "${S}"/${CCTOOLS}
	emake install_all_but_headers \
	EFITOOLS= \
	COMMON_SUBDIRS='ar misc otool' \
	SUBDIRS_32= \
	DSTROOT=\"${D}\" \
	BINDIR=\"${EPREFIX}\"${BINPATH} \
	LOCBINDIR=\"${EPREFIX}\"${BINPATH} \
	USRBINDIR=\"${EPREFIX}\"${BINPATH} \
	LOCLIBDIR=\"${EPREFIX}\"${LIBPATH} \
	MANDIR=\"${EPREFIX}\"${DATAPATH}/man/
	cd "${S}"/${CCTOOLS}/as
	emake install \
	BUILD_OBSOLETE_ARCH= \
	DSTROOT=\"${D}\" \
	USRBINDIR=\"${EPREFIX}\"${BINPATH} \
	LIBDIR=\"${EPREFIX}\"${LIBPATH} \
	LOCLIBDIR=\"${EPREFIX}\"${LIBPATH}

	cd "${ED}"${BINPATH}
	insinto ${DATAPATH}/man/man1
	local skips manpage
	# ar brings an up-to-date manpage with it
	skips=( ar )
	for bin in *; do
	for skip in ${skips[@]}; do
	if [[ ${bin} == ${skip} ]]; then
	continue 2;
	fi
	done
	manpage=${S}/${CCTOOLS}/man/${bin}.1
	if [[ -f "${manpage}" ]]; then
	doins "${manpage}"
	fi
	done
	insinto ${DATAPATH}/man/man5
	doins "${S}"/${CCTOOLS}/man/*.5
	}

	src_test() {
	if ! [ "${EPREFIX}"/usr/bin/clang ] ; then
	einfo "Test suite only works properly with clang - please install"
	return
	fi

	einfo "Running unit tests"
	cd "${S}"/${LD64}/unit-tests/test-cases
	# provide the new ld as a symlink to clang so that -ccc-install-dir
	# will pick it up
	ln -sfn ../../src/ld64 ld
	# use our arch command because the System's will report i386 even for an
	# x86_64 prefix
	perl ../bin/make-recursive.pl \
	BUILT_PRODUCTS_DIR="${S}"/${LD64}/src \
	ARCH="$(arch)" \
	LD="${S}"/${LD64}/src/ld64 \
	CC="clang -ccc-install-dir $PWD" \
	CXX="clang++ -ccc-install-dir $PWD" \
	OTOOL="${S}"/${CCTOOLS}/otool/otool.NEW \
	\| perl ../bin/result-filter.pl
	}

	src_install() {
	install_ld64
	install_cctools

	cd "${S}"
	insinto /etc/env.d/binutils
	cat <<-EOF > env.d
	TARGET="${CHOST}"
	VER="${PV}"
	FAKE_TARGETS="${CHOST}"
	EOF
	newins env.d ${CHOST}-${PV}
	}

	pkg_postinst() {
	binutils-config ${CHOST}-${PV}
	}