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# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
EAPI=5
ESVN_REPO_URI="http://llvm.org/svn/llvm-project/libcxx/trunk"
[ "${PV%9999}" != "${PV}" ] && SCM="subversion" || SCM=""
inherit ${SCM} flag-o-matic toolchain-funcs multilib multilib-minimal
DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
HOMEPAGE="http://libcxx.llvm.org/"
if [ "${PV%9999}" = "${PV}" ] ; then
SRC_URI="http://llvm.org/releases/${PV}/${P}.src.tar.xz"
S="${WORKDIR}/${P}.src"
else
SRC_URI=""
fi
LICENSE="|| ( UoI-NCSA MIT )"
SLOT="0"
if [ "${PV%9999}" = "${PV}" ] ; then
KEYWORDS="~amd64 ~mips ~x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux"
else
KEYWORDS=""
fi
IUSE="elibc_glibc elibc_musl +libcxxrt libunwind +static-libs test"
REQUIRED_USE="libunwind? ( libcxxrt )"
RDEPEND="libcxxrt? ( >=sys-libs/libcxxrt-0.0_p20130725[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
!libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] )"
DEPEND="${RDEPEND}
test? ( sys-devel/clang )
app-arch/xz-utils"
DOCS=( CREDITS.TXT )
pkg_setup() {
if ! use libcxxrt ; then
ewarn "You have disabled USE=libcxxrt. This will build ${PN} against"
ewarn "libsupc++. Please note that this is not well supported."
ewarn "In particular, static linking will not work."
fi
if tc-is-gcc && [[ $(gcc-version) < 4.7 ]] ; then
eerror "${PN} needs to be built with gcc-4.7 or later (or other"
eerror "conformant compilers). Please use gcc-config to switch to"
eerror "gcc-4.7 or later version."
die
fi
}
src_prepare() {
cp -f "${FILESDIR}/Makefile" lib/ || die
use elibc_musl && epatch "${FILESDIR}/${P}-musl-support.patch"
multilib_copy_sources
}
src_configure() {
export LIBS="-lpthread -lrt -lc -l$(usex libunwind unwind gcc_s)"
if use libcxxrt ; then
append-cppflags -DLIBCXXRT "-I${EPREFIX}/usr/include/libcxxrt/"
LIBS="-lcxxrt ${LIBS}"
cp "${EPREFIX}/usr/include/libcxxrt/"*.h "${S}/include"
else
# Very hackish, see $HOMEPAGE
# If someone has a clever idea, please share it!
local includes="$(echo | ${CHOST}-g++ -Wp,-v -x c++ - -fsyntax-only 2>&1 | grep -C 2 '#include.*<...>' | tail -n 2 | sed -e 's/^ /-I/' | tr '\n' ' ')"
local libcxx_gcc_dirs="$(echo | ${CHOST}-g++ -Wp,-v -x c++ - -fsyntax-only 2>&1 | grep -C 2 '#include.*<...>' | tail -n 2 | tr '\n' ' ')"
append-cppflags -D__GLIBCXX__ ${includes}
LIBS="-lsupc++ ${LIBS}"
local libsupcxx_includes="cxxabi.h bits/c++config.h bits/os_defines.h bits/cpu_defines.h bits/cxxabi_tweaks.h bits/cxxabi_forced.h"
for i in ${libsupcxx_includes} ; do
local found=""
[ -d "${S}/include/$(dirname ${i})/" ] || mkdir -p "${S}/include/$(dirname ${i})"
for j in ${libcxx_gcc_dirs} ; do
if [ -f "${j}/${i}" ] ; then
cp "${j}/${i}" "${S}/include/$(dirname ${i})/" || die
found=yes
fi
done
[ -n "${found}" ] || die "Header not found: ${i}"
done
fi
tc-export AR CC CXX
append-ldflags "-Wl,-z,defs" # make sure we are not underlinked
}
multilib_src_compile() {
cd "${BUILD_DIR}/lib" || die
emake shared
use static-libs && emake static
}
# Tests fail for now, if anybody is able to fix them, help is very welcome.
multilib_src_test() {
cd "${BUILD_DIR}/test"
LD_LIBRARY_PATH="${BUILD_DIR}/lib:${LD_LIBRARY_PATH}" \
CC="clang++ $(get_abi_CFLAGS) ${CXXFLAGS}" \
HEADER_INCLUDE="-I${BUILD_DIR}/include" \
SOURCE_LIB="-L${BUILD_DIR}/lib" \
LIBS="-lm $(usex libcxxrt -lcxxrt "")" \
./testit || die
# TODO: fix link against libsupc++
}
# Usage: deps
gen_ldscript() {
local output_format
output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
cat <<-END_LDSCRIPT
/* GNU ld script
Include missing dependencies
*/
${output_format}
GROUP ( $@ )
END_LDSCRIPT
}
gen_static_ldscript() {
if use libcxxrt ; then
# Move it first.
mv "${ED}/usr/$(get_libdir)/libc++.a" "${ED}/usr/$(get_libdir)/libc++_static.a" || die
# Generate libc++.a ldscript for inclusion of its dependencies so that
# clang++ -stdlib=libc++ -static works out of the box.
local deps="${EPREFIX}/usr/$(get_libdir)/libc++_static.a ${EPREFIX}/usr/$(get_libdir)/libcxxrt.a"
# On Linux/glibc it does not link without libpthread or libdl. It is
# fine on FreeBSD.
use elibc_glibc && deps="${deps} ${EPREFIX}/usr/$(get_libdir)/libpthread.a ${EPREFIX}/usr/$(get_libdir)/libdl.a"
# unlike libgcc_s, libunwind is not implicitly linked
use libunwind && deps="${deps} ${EPREFIX}/usr/$(get_libdir)/libunwind.a"
gen_ldscript "${deps}" > "${ED}/usr/$(get_libdir)/libc++.a"
fi
# TODO: Generate a libc++.a ldscript when building against libsupc++
}
gen_shared_ldscript() {
if use libcxxrt ; then
mv "${ED}/usr/$(get_libdir)/libc++.so" "${ED}/usr/$(get_libdir)/libc++_shared.so" || die
local deps="${EPREFIX}/usr/$(get_libdir)/libc++_shared.so ${EPREFIX}/usr/$(get_libdir)/libcxxrt.so"
use libunwind && deps="${deps} ${EPREFIX}/usr/$(get_libdir)/libunwind.so"
gen_ldscript "${deps}" > "${ED}/usr/$(get_libdir)/libc++.so"
fi
# TODO: Generate the linker script for other configurations too.
}
multilib_src_install() {
cd "${BUILD_DIR}/lib"
if use static-libs ; then
dolib.a libc++.a
gen_static_ldscript
fi
dolib.so libc++.so*
gen_shared_ldscript
}
multilib_src_install_all() {
einstalldocs
insinto /usr/include/c++/v1
doins -r include/*
}
pkg_postinst() {
elog "This package (${PN}) is mainly intended as a replacement for the C++"
elog "standard library when using clang."
elog "To use it, instead of libstdc++, use:"
elog " clang++ -stdlib=libc++"
elog "to compile your C++ programs."
}
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