sys-libs/libcxx: Bump to 7.0.0rc2

2 files changed, 210 insertions, 0 deletions

diff --git a/sys-libs/libcxx/Manifest b/sys-libs/libcxx/Manifest
index 80b76519c36d..2f9be098f510 100644
--- a/sys-libs/libcxx/Manifest
+++ b/sys-libs/libcxx/Manifest
@@ -3,3 +3,4 @@ DIST libcxx-3.9.1.src.tar.xz 1209020 BLAKE2B 510e77c2c1163babbba904933f441e8720b
 DIST libcxx-4.0.1.src.tar.xz 1446380 BLAKE2B cd871eff4c4ca25a1fe4d27f778e913fe536a0b5863ea7dd3c8895f6b743b6f039e4df71f9ba5124c98761a8099666f68e1dfd073b5ec7b9fe0007ef09a9117d SHA512 91f3f397be606989be99865d0b279557f9afb93f7a74ed10c3a74f4440e38b5694ddf452bbf2f487cacd4391606dd5c7edfe5130f2de19e2acfd6cce619d028a
 DIST libcxx-5.0.2.src.tar.xz 1530908 BLAKE2B e0c47d6803668267a71c75df873a136a2c3bec3732a08c365107b286f6dfef883edb81f9f4d22a0f312228865528bf1f15450c41803f8d3a8c8081fe12b62c25 SHA512 c77e0ea6bb3dc03270312de4a24fdd0d027448b2e182af31489031fd52f0997377c9049769930b80b2ba0062fe21317d8ae823c5e80e12128f8ae8e6f171be22
 DIST libcxx-6.0.1.src.tar.xz 1552328 BLAKE2B 65a6addd04e530c2a72e8cba207282b9e9fafc01a594d7b11f63d10b6f88eca67a3cdf90b8055e410ede358d9be1f63fbe427f308e1337833447c0260d96e1c8 SHA512 c04f628b0924d76f035f615b59d19ce42dfc19c9a8eea4fe2b22a95cfe5a037ebdb30943fd741443939df5b4cf692bc1e51c840fefefbd134e3afbe2a75fe875
+DIST libcxx-7.0.0rc2.src.tar.xz 1654748 BLAKE2B 95664de42bfa6b77c5db32c092469c36e92b5eb9554bf381f761e04a29da1f413c1ead2ac93674a30ad9d743aa3cc9f22e5edebd043d16f903ed83901a743ae6 SHA512 c0b84400cb7694f7088b965cb0cac26853ecc485c775afbb0ad2cfdc53497eb95b76f917b16090372b77297e7f80372aef29023da564387be49e2f412efb5746
diff --git a/sys-libs/libcxx/libcxx-7.0.0_rc2.ebuild b/sys-libs/libcxx/libcxx-7.0.0_rc2.ebuild
new file mode 100644
index 000000000000..cc26d7d1ce0f
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-7.0.0_rc2.ebuild
@@ -0,0 +1,209 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+# Ninja provides better scalability and cleaner verbose output, and is used
+# throughout all LLVM projects.
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+# (needed due to CMAKE_BUILD_TYPE != Gentoo)
+CMAKE_MIN_VERSION=3.7.0-r1
+PYTHON_COMPAT=( python2_7 )
+
+inherit cmake-multilib llvm multiprocessing python-any-r1 \
+	toolchain-funcs
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+SRC_URI="https://prereleases.llvm.org/${PV/_//}/${P/_/}.src.tar.xz"
+
+LICENSE="|| ( UoI-NCSA MIT )"
+SLOT="0"
+KEYWORDS=""
+IUSE="elibc_glibc elibc_musl +libcxxabi libcxxrt +libunwind +static-libs test"
+REQUIRED_USE="libunwind? ( || ( libcxxabi libcxxrt ) )
+	?? ( libcxxabi libcxxrt )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	libcxxrt? ( sys-libs/libcxxrt[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxabi? ( !libcxxrt? ( >=sys-devel/gcc-4.7:=[cxx] ) )"
+# llvm-6 for new lit options
+# clang-3.9.0 installs necessary target symlinks unconditionally
+# which removes the need for MULTILIB_USEDEP
+DEPEND="${RDEPEND}
+	test? ( >=sys-devel/clang-3.9.0
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )
+	app-arch/xz-utils
+	>=sys-devel/llvm-6"
+
+S=${WORKDIR}/${P/_/}.src
+
+DOCS=( CREDITS.TXT )
+
+PATCHES=(
+	# Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a
+	# out-of-tree build.
+	"${FILESDIR}/${PN}-3.9-cmake-link-flags.patch"
+)
+
+# least intrusive of all
+CMAKE_BUILD_TYPE=RelWithDebInfo
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	llvm_pkg_setup
+	use test && python-any-r1_pkg_setup
+
+	if ! use libcxxabi && ! use libcxxrt && ! tc-is-gcc ; then
+		eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
+		eerror "compilers are not supported. Please set CC=gcc and CXX=g++"
+		eerror "and try again."
+		die
+	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
+}
+
+test_compiler() {
+	$(tc-getCXX) ${CXXFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c++ - \
+		<<<'int main() { return 0; }' &>/dev/null
+}
+
+multilib_src_configure() {
+	local cxxabi cxxabi_incs
+	if use libcxxabi; then
+		cxxabi=libcxxabi
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
+	elif use libcxxrt; then
+		cxxabi=libcxxrt
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxrt"
+	else
+		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
+		cxxabi=libsupc++
+		cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
+	fi
+
+	# we want -lgcc_s for unwinder, and for compiler runtime when using
+	# gcc, clang with gcc runtime (or any unknown compiler)
+	local extra_libs=() want_gcc_s=ON
+	if use libunwind; then
+		# work-around missing -lunwind upstream
+		extra_libs+=( -lunwind )
+		# if we're using libunwind and clang with compiler-rt, we want
+		# to link to compiler-rt instead of -lgcc_s
+		if tc-is-clang; then
+			local compiler_rt=$($(tc-getCC) ${CFLAGS} ${CPPFLAGS} \
+			   ${LDFLAGS} -print-libgcc-file-name)
+			if [[ ${compiler_rt} == *libclang_rt* ]]; then
+				want_gcc_s=OFF
+				extra_libs+=( "${compiler_rt}" )
+			fi
+		fi
+	fi
+
+	# bootstrap: cmake is unhappy if compiler can't link to stdlib
+	local nolib_flags=( -nodefaultlibs -lc )
+	if ! test_compiler; then
+		if test_compiler "${nolib_flags[@]}"; then
+			local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
+			ewarn "${CXX} seems to lack runtime, trying with ${nolib_flags[*]}"
+		fi
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
+		-DLIBCXX_CXX_ABI=${cxxabi}
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=${cxxabi_incs}
+		# we're using our own mechanism for generating linker scripts
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
+	)
+
+	if use test; then
+		local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+		local jobs=${LIT_JOBS:-$(makeopts_jobs "${MAKEOPTS}" "$(get_nproc)")}
+
+		[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="-vv;-j;${jobs};--param=cxx_under_test=${clang_path}"
+		)
+	fi
+	cmake-utils_src_configure
+}
+
+multilib_src_test() {
+	cmake-utils_src_make check-libcxx
+}
+
+# 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 ( $@ )
+END_LDSCRIPT
+}
+
+gen_static_ldscript() {
+	local libdir=$(get_libdir)
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.a" "$(usex libcxxrt "libcxxrt.a" "libsupc++.a")")
+
+	# Move it first.
+	mv "${ED}/usr/${libdir}/libc++.a" "${ED}/usr/${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="libc++_static.a ${cxxabi_lib} $(usex libunwind libunwind.a libgcc_eh.a)"
+	# On Linux/glibc it does not link without libpthread or libdl. It is
+	# fine on FreeBSD.
+	use elibc_glibc && deps+=" libpthread.a libdl.a"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.a" || die
+}
+
+gen_shared_ldscript() {
+	local libdir=$(get_libdir)
+	# libsupc++ doesn't have a shared version
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "$(usex libcxxrt "libcxxrt.so" "libsupc++.a")")
+
+	mv "${ED}/usr/${libdir}/libc++.so" "${ED}/usr/${libdir}/libc++_shared.so" || die
+	local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.so" || die
+}
+
+multilib_src_install() {
+	cmake-utils_src_install
+	gen_shared_ldscript
+	use static-libs && gen_static_ldscript
+}
+
+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."
+}