gentoo resync : 20.03.2022

5 files changed, 253 insertions, 18 deletions

diff --git a/sys-libs/libcxx/Manifest b/sys-libs/libcxx/Manifest
index c571b490c484..99a31a736c52 100644
--- a/sys-libs/libcxx/Manifest
+++ b/sys-libs/libcxx/Manifest
@@ -1,16 +1,18 @@
 DIST llvm-gentoo-patchset-11.1.0-1.tar.xz 4032 BLAKE2B e69138a422e315b31a3d9c11faa4ae1ddf1bf9092cee2db0de4d2adef81fd802973488293aab48b764402b51996893b17ca03249ef4620848a576d1f6cdb9698 SHA512 e1c5504dab6c5db9fdf4addfeb12316f22d0258717ba551a9b7b3ba37919491fb6011ac5cca1e793b7509d5c1c186bc6bc4213f7d6155d190612492b216f979b
 DIST llvm-gentoo-patchset-12.0.1.tar.xz 5280 BLAKE2B 963d005bc7b636570be90eb841ac5bcaeb927538cc7de27683167111a17d6496677c7517de2ecfaf14b5d8ac22bad357be490b8a2ed9aba502fd5f447ecc99e9 SHA512 fc7c38e671555751650299c3a8bee44d5c7f26e11b68d5538c507fb7fe9ff2d349bdcd43bce90a448a747f082d523b3849d6bcda5e3ae2e998edcb926d6aa249
 DIST llvm-gentoo-patchset-13.0.0.tar.xz 5012 BLAKE2B 6760c78c086aaf6629143fd920b0a2c68cad9278628fbea8164dfeb59db95984a5b5d6b3505b510c697e8c95bf8d2be782c6b73c01622d52f2da9b07ecff39e0 SHA512 7764d49343b795b6bebae64f646ba27e3e6cc2a20b8a1aee645ce0d8474633c34acfbb73c08546fee415755dd4ea5a98c1d84db5e394cf5f4fc802eb61148ab6
-DIST llvm-gentoo-patchset-13.0.1-rc3.tar.xz 4808 BLAKE2B d8ed3ae424914437413e2e8c029880072e93d79ca79b842ad59451df46594c9b0d73ee5d49d3b65c4c7a40c86b2e0d43501ef106aea7c481f22425a5245a3411 SHA512 10430a720b120a340a681fa435a7f050741c75270607e3f5214bf829313d274c11f019f1ac072857dc5d7f868e6eb013932d1c94446e8cb2e151ac818a081914
+DIST llvm-gentoo-patchset-13.0.1.tar.xz 6288 BLAKE2B 899222b962486e924e4f8a2b574d285531a3f87af9385ff68c81db92aa224a0cde6d4ee049b5405056bedb4b232b50e1d5840024071a4a215f6311853304c92d SHA512 b2805337f1deca626768a44c5e7ac9ed16e0c31bead1647d44a493a8123c1b8e8f1c8ceee3536bcc6fa87fdd3fcec408229f701adf30eff07e7ef9889b847b01
 DIST llvm-gentoo-patchset-9999-1.tar.xz 4032 BLAKE2B b9413484dafed8ae0c68c2c164b45fd07bb8d5d0898f03abe118fd2120ffcb1fb6c949de9649a97c2e8105f24b9d131a725c67c0a502ca4d4d192c1a0d65f49d SHA512 e64449eeaf756c5bd945109937b84ba4bd8a015222bd792d39cf3947871e87571a4ca57814790e51544cb05ad4c2d1f044e818e4caaac7c2e2a02cb1aa290fcc
 DIST llvmorg-11.1.0.tar.gz 122776532 BLAKE2B ca842ff4afff8f44c82b5e7383962a9c45ca1c93b64fa4c6ebcd70a1d3849dbad2b8e4e24fba02d144c6266d7fab3607ebc6999b28c229cb35256cf40f26a985 SHA512 9a8ce022a935eed42fa71a224f2a207122aadcbef58ee855fdb4825f879e7d028e4dcff22c19b9d336db1c8bf63fb84372d44981acf84615f757e54306c92b81
 DIST llvmorg-12.0.1.tar.gz 134259748 BLAKE2B f41de787bc73ff2edfda1b22cc8602be6f65f37dd9e4c8888533cfa8c3ccdcf4f108aaab9de23ab0ab987966eb160f2a553a0bdff99461e71ddd5bfcd086090d SHA512 6eb0dc18e2c25935fabfdfc48b0114be0939158dfdef7b85b395fe2e71042672446af0e68750aae003c9847d10d1f63316fe95d3df738d18f249174292b1b9e1
 DIST llvmorg-13.0.0.tar.gz 147270176 BLAKE2B 628f316b580e1edf3a58d4825b724df759e6ed2a4116802470c04562caefc392fa325c91f388036365a2e45a9595cca6d3557fab12984fc8bcfef29c9116d822 SHA512 8004c05d32b9720fb3391783621690c1df9bd1e97e72cbff9192ed88a84b0acd303b61432145fa917b5b5e548c8cee29b24ef8547dcc8677adf4816e7a8a0eb2
-DIST llvmorg-13.0.1-rc3.tar.gz 147302323 BLAKE2B 9ac2f97568062d7dd618295a68d6e14898fcd69e2bb66290b999ceb8c12132371f4e9b59d8ba2b252e5e5cb249045676b24fc50c117b2afae20abab98f426582 SHA512 88a04ad02af2d41ec21c7a62bad21ee0e627b7276a16795875afd062ed29ac7fb4aadec5b5e48785a6502c9fd797a4b67d648a21f193c9f7602112870b10a3d1
+DIST llvmorg-13.0.1.tar.gz 147290251 BLAKE2B 2a44b012a672501761d0c27c6b3a315b69bfef0cd13b078a7e7d2fccc4a9c8c0f2bee0f164c4271c9106b0a99cb06e8b64986f66253b613336719fb86b82541b SHA512 9a8cb5d11964ba88b7624f19ec861fb28701f23956ea3c92f6ac644332d5f41fde97bd8933dd3ee70ed378058c252fa3a3887c8d1af90d219970c2b27691166f
+DIST llvmorg-14.0.0-rc4.tar.gz 158082013 BLAKE2B 0e717898d8f1ed160e525a68aba56a84b7d31856ea72fdb8fa02e863c5a2074245a38d4a4aa7d178beab1ea64aa92d0ba9dcad4373ebb03868070bf718112107 SHA512 a942848aa5042b97bab6d0d5bcee11ea2f85f1244d7eaadb8f7000bf104b2160e6034c04e3755501dd178bc99c26669cf4aca40edb4bba598fdde6bcf3f40ddc
 EBUILD libcxx-11.1.0.ebuild 6638 BLAKE2B 1c141e7dc80e2e4a47d7619500626458c931903c7efc1d5b1f3173ff927ec682b277ed0a932af1681df1416f499d98fd1e8c024ddd14d839a543bf42f673e896 SHA512 4d37e1d3077908dd49fd55b8422f12547848d58dede2b6f9be58d993862d71e47a45c6ce383677b46c178dbfd6c22559beb7f7745f3b589039208d63585174e2
 EBUILD libcxx-12.0.1.ebuild 6677 BLAKE2B 32a2f3bbff395d3c129cd4d168a8cb0ee1074c3fc164bf9a33f3287852c07af3e7443018b3fa31036f851cf5544bf80db0579ba2dfa2a3420801a6aef0dd6b05 SHA512 3820b6a249a36cf12ba72b4c4a3847ec035265ce23388dcdbc0547c5708737eee4cf449b14370badc13be3f79ecda2f3c788ac6c7f2f8063c3dd53b1e7b1bf62
 EBUILD libcxx-13.0.0.ebuild 6756 BLAKE2B c27aba7517136e19bdebd4f864958922000fd9d59791c0ae0407afffa5c39db21c3cbf2655532453679a54beddd46ad90df2a9482fed99501340f6b0073e264b SHA512 0516aed74ebe4cb170c2b3a975005f054e1227cdd8ae4807c7f1e6796055b09abce148a44425ffd12dde88eb8f638559e3a3dd6c7e29b1fe2bdc86123783f941
-EBUILD libcxx-13.0.1.9999.ebuild 6716 BLAKE2B ad2420099c6987e13b4ec545ce9e52f734f7032002999c5e8ab4a848f3797bd02ad6786fe533398e961d1587f8646dec33a9317fa9cf1b989aa97cc800f0f1e9 SHA512 5ce31705183eb83e3246e65d5a1fb8ed0706860628ceb3d34733fd5c591ec1c5c2907ee13732b2f8d78e732ed33a60b4cb1f070429041f07f8633f352830314f
-EBUILD libcxx-13.0.1_rc3.ebuild 6719 BLAKE2B a10d4e77b0bb0e60cd9c2e8875e6669d4a2b9add8aad189f200e3c1b13c3398587451a7539771d9b4b84c26bb5ed938169dac93fe8d14fdcbfb5e10c819f8b55 SHA512 122d17dc87701a609c34825ac22d7de97ba30a28825e1602b5af7e497de728635e43145dbb8b2565234aa47a02c93fb6c7d62dde3383b1d0f87e894d8d30fc88
-EBUILD libcxx-14.0.0.9999.ebuild 6722 BLAKE2B 4f25763ab58e10be519adb7fd2fca0098cf8889e0a7c00c3e3891cab28fd895b84dadbf3045344e5c9ce78a9ad854b1a1dd7fb7760a1f6b38e23a1293012f407 SHA512 2f4593c77038988ddc41ec2b92637c70e4c0aaca85ff5ca6bb531764f4721b33b8f2b9ce91e268a5496eebc2ac559ce6b92a1db11dc658b540a29dafd98b8e4c
+EBUILD libcxx-13.0.1.ebuild 6781 BLAKE2B 6ada751bfe1f8e1980e4c20b2a45f237c6630deb4fbb695701b596af17b78391e6a2db99101371a6577f4d414933cf4143d0b60d29fd62e6ec8d6ef3f563b77d SHA512 9d389d1323e866d9b66881b215a2625eee8263a6df790ef5027462b0c3de5421d4ae6077d5861fdfe8adad9d66e34a12de754149e1a1764a42fd824b900c03ac
+EBUILD libcxx-14.0.0.9999.ebuild 6893 BLAKE2B d45f14e1ecf594063281916fdd8d63bca9fe910e2c51b7d9ca03d363bb1fe9ec06504af44fc61be1f848094ef76ea752ffe479553e9b990544482c69211bea67 SHA512 814773f6731309b31e46636e6e3ed9b4508ed60154eda14826015bf0da75ff4a2cebdacbb1e1535958d3af1d1f10b1e552126eb6aebed945f3a034d36d1b9e1e
+EBUILD libcxx-14.0.0_rc4.ebuild 6893 BLAKE2B d45f14e1ecf594063281916fdd8d63bca9fe910e2c51b7d9ca03d363bb1fe9ec06504af44fc61be1f848094ef76ea752ffe479553e9b990544482c69211bea67 SHA512 814773f6731309b31e46636e6e3ed9b4508ed60154eda14826015bf0da75ff4a2cebdacbb1e1535958d3af1d1f10b1e552126eb6aebed945f3a034d36d1b9e1e
+EBUILD libcxx-15.0.0.9999.ebuild 6893 BLAKE2B d45f14e1ecf594063281916fdd8d63bca9fe910e2c51b7d9ca03d363bb1fe9ec06504af44fc61be1f848094ef76ea752ffe479553e9b990544482c69211bea67 SHA512 814773f6731309b31e46636e6e3ed9b4508ed60154eda14826015bf0da75ff4a2cebdacbb1e1535958d3af1d1f10b1e552126eb6aebed945f3a034d36d1b9e1e
 MISC metadata.xml 622 BLAKE2B 33ff3f89844694f08cdcdb12d7098ad937041c31aa6f453fbd887bfebec688bc05552f9a39431daccd2b309a58c2fb75b04a6350410f90beb96f32c14ab3ca95 SHA512 8b3d12f8904c336cc35f31352014ffe247dd4475f143921cdd56e5396590ebd64fb700df64f76e83aece127d8ed39af5f45da086fa75fca841c9a5ad767cbed2
diff --git a/sys-libs/libcxx/libcxx-13.0.1_rc3.ebuild b/sys-libs/libcxx/libcxx-13.0.1.ebuild
index 0e230df43a5d..15d5fa2f2dfc 100644
--- a/sys-libs/libcxx/libcxx-13.0.1_rc3.ebuild
+++ b/sys-libs/libcxx/libcxx-13.0.1.ebuild
@@ -12,7 +12,7 @@ HOMEPAGE="https://libcxx.llvm.org/"
 
 LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
 SLOT="0"
-KEYWORDS=""
+KEYWORDS="amd64 arm arm64 ~riscv ~x86 ~x64-macos"
 IUSE="+libcxxabi +libunwind static-libs test"
 REQUIRED_USE="libunwind? ( libcxxabi )"
 RESTRICT="!test? ( test )"
@@ -29,6 +29,7 @@ BDEPEND="
 	test? (
 		>=dev-util/cmake-3.16
 		>=sys-devel/clang-3.9.0
+		sys-devel/gdb[python]
 		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
 	)"
 
diff --git a/sys-libs/libcxx/libcxx-14.0.0.9999.ebuild b/sys-libs/libcxx/libcxx-14.0.0.9999.ebuild
index ff9cb4ac3d94..0562667b5a4b 100644
--- a/sys-libs/libcxx/libcxx-14.0.0.9999.ebuild
+++ b/sys-libs/libcxx/libcxx-14.0.0.9999.ebuild
@@ -26,19 +26,20 @@ RDEPEND="
 DEPEND="${RDEPEND}
 	>=sys-devel/llvm-6"
 BDEPEND="
+	${PYTHON_DEPS}
 	test? (
 		>=dev-util/cmake-3.16
 		>=sys-devel/clang-3.9.0
+		sys-devel/gdb[python]
 		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
 	)"
 
-DOCS=( CREDITS.TXT )
-
-LLVM_COMPONENTS=( libcxx{,abi} llvm/{cmake,utils/llvm-lit} cmake )
+LLVM_COMPONENTS=( runtimes libcxx{,abi} llvm/{cmake,utils/llvm-lit} cmake )
 LLVM_PATCHSET=9999-1
 llvm.org_set_globals
 
 python_check_deps() {
+	use test || return 0
 	has_version "dev-python/lit[${PYTHON_USEDEP}]"
 }
 
@@ -49,7 +50,7 @@ pkg_setup() {
 	if [[ ${CHOST} != *-darwin* ]] || has_version dev-lang/llvm; then
 		llvm_pkg_setup
 	fi
-	use test && python-any-r1_pkg_setup
+	python-any-r1_pkg_setup
 
 	if ! use libcxxabi && ! tc-is-gcc ; then
 		eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
@@ -69,7 +70,7 @@ src_configure() {
 	# alter the CHOST
 	local cxxabi cxxabi_incs
 	if use libcxxabi; then
-		cxxabi=libcxxabi
+		cxxabi=system-libcxxabi
 		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
 	else
 		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
@@ -120,7 +121,11 @@ multilib_src_configure() {
 
 	local libdir=$(get_libdir)
 	local mycmakeargs=(
-		-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
+		-DPython3_EXECUTABLE="${PYTHON}"
+		-DLLVM_ENABLE_RUNTIMES=libcxx
+		-DLLVM_INCLUDE_TESTS=OFF
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+
 		-DLIBCXX_ENABLE_SHARED=ON
 		-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
 		-DLIBCXX_CXX_ABI=${cxxabi}
@@ -129,6 +134,7 @@ multilib_src_configure() {
 		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
 		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
 		-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
+		-DLIBCXX_INCLUDE_BENCHMARKS=OFF
 		-DLIBCXX_INCLUDE_TESTS=$(usex test)
 		-DLIBCXX_USE_COMPILER_RT=${want_compiler_rt}
 		-DLIBCXX_HAS_ATOMIC_LIB=${want_gcc_s}
diff --git a/sys-libs/libcxx/libcxx-13.0.1.9999.ebuild b/sys-libs/libcxx/libcxx-14.0.0_rc4.ebuild
index a9c71dc6e041..0562667b5a4b 100644
--- a/sys-libs/libcxx/libcxx-13.0.1.9999.ebuild
+++ b/sys-libs/libcxx/libcxx-14.0.0_rc4.ebuild
@@ -26,19 +26,20 @@ RDEPEND="
 DEPEND="${RDEPEND}
 	>=sys-devel/llvm-6"
 BDEPEND="
+	${PYTHON_DEPS}
 	test? (
 		>=dev-util/cmake-3.16
 		>=sys-devel/clang-3.9.0
+		sys-devel/gdb[python]
 		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
 	)"
 
-DOCS=( CREDITS.TXT )
-
-LLVM_COMPONENTS=( libcxx{,abi} llvm/{cmake,utils/llvm-lit} )
+LLVM_COMPONENTS=( runtimes libcxx{,abi} llvm/{cmake,utils/llvm-lit} cmake )
 LLVM_PATCHSET=9999-1
 llvm.org_set_globals
 
 python_check_deps() {
+	use test || return 0
 	has_version "dev-python/lit[${PYTHON_USEDEP}]"
 }
 
@@ -49,7 +50,7 @@ pkg_setup() {
 	if [[ ${CHOST} != *-darwin* ]] || has_version dev-lang/llvm; then
 		llvm_pkg_setup
 	fi
-	use test && python-any-r1_pkg_setup
+	python-any-r1_pkg_setup
 
 	if ! use libcxxabi && ! tc-is-gcc ; then
 		eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
@@ -69,7 +70,7 @@ src_configure() {
 	# alter the CHOST
 	local cxxabi cxxabi_incs
 	if use libcxxabi; then
-		cxxabi=libcxxabi
+		cxxabi=system-libcxxabi
 		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
 	else
 		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
@@ -120,7 +121,11 @@ multilib_src_configure() {
 
 	local libdir=$(get_libdir)
 	local mycmakeargs=(
-		-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
+		-DPython3_EXECUTABLE="${PYTHON}"
+		-DLLVM_ENABLE_RUNTIMES=libcxx
+		-DLLVM_INCLUDE_TESTS=OFF
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+
 		-DLIBCXX_ENABLE_SHARED=ON
 		-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
 		-DLIBCXX_CXX_ABI=${cxxabi}
@@ -129,6 +134,7 @@ multilib_src_configure() {
 		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
 		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
 		-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
+		-DLIBCXX_INCLUDE_BENCHMARKS=OFF
 		-DLIBCXX_INCLUDE_TESTS=$(usex test)
 		-DLIBCXX_USE_COMPILER_RT=${want_compiler_rt}
 		-DLIBCXX_HAS_ATOMIC_LIB=${want_gcc_s}
diff --git a/sys-libs/libcxx/libcxx-15.0.0.9999.ebuild b/sys-libs/libcxx/libcxx-15.0.0.9999.ebuild
new file mode 100644
index 000000000000..0562667b5a4b
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-15.0.0.9999.ebuild
@@ -0,0 +1,220 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+CMAKE_ECLASS=cmake
+PYTHON_COMPAT=( python3_{8..10} )
+inherit cmake-multilib llvm llvm.org python-any-r1 toolchain-funcs
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="0"
+KEYWORDS=""
+IUSE="+libcxxabi +libunwind static-libs test"
+REQUIRED_USE="libunwind? ( libcxxabi )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxabi? ( >=sys-devel/gcc-4.7:=[cxx] )"
+# llvm-6 for new lit options
+# clang-3.9.0 installs necessary target symlinks unconditionally
+# which removes the need for MULTILIB_USEDEP
+DEPEND="${RDEPEND}
+	>=sys-devel/llvm-6"
+BDEPEND="
+	${PYTHON_DEPS}
+	test? (
+		>=dev-util/cmake-3.16
+		>=sys-devel/clang-3.9.0
+		sys-devel/gdb[python]
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+	)"
+
+LLVM_COMPONENTS=( runtimes libcxx{,abi} llvm/{cmake,utils/llvm-lit} cmake )
+LLVM_PATCHSET=9999-1
+llvm.org_set_globals
+
+python_check_deps() {
+	use test || return 0
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	# Darwin Prefix builds do not have llvm installed yet, so rely on
+	# bootstrap-prefix to set the appropriate path vars to LLVM instead
+	# of using llvm_pkg_setup.
+	if [[ ${CHOST} != *-darwin* ]] || has_version dev-lang/llvm; then
+		llvm_pkg_setup
+	fi
+	python-any-r1_pkg_setup
+
+	if ! use libcxxabi && ! 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
+}
+
+test_compiler() {
+	$(tc-getCXX) ${CXXFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c++ - \
+		<<<'int main() { return 0; }' &>/dev/null
+}
+
+src_configure() {
+	# note: we need to do this before multilib kicks in since it will
+	# alter the CHOST
+	local cxxabi cxxabi_incs
+	if use libcxxabi; then
+		cxxabi=system-libcxxabi
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
+	else
+		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
+		cxxabi=libsupc++
+		cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
+	fi
+
+	multilib-minimal_src_configure
+}
+
+multilib_src_configure() {
+	# 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 want_compiler_rt=OFF
+	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 [[ ${compiler_rt} == *libclang_rt* ]]; then
+				want_gcc_s=OFF
+				want_compiler_rt=ON
+				extra_libs+=( "${compiler_rt}" )
+			fi
+		fi
+	elif [[ ${CHOST} == *-darwin* ]] && tc-is-clang; then
+		# clang-based darwin prefix disables libunwind useflag during
+		# bootstrap, because libunwind is not in the prefix yet.
+		# override the default, though, because clang based libcxx
+		# should never use gcc_s on Darwin.
+		want_gcc_s=OFF
+		# compiler_rt is not available in EPREFIX during bootstrap,
+		# so we cannot link to it yet anyway, so keep the defaults
+		# of want_compiler_rt=OFF and extra_libs=()
+	fi
+
+	# bootstrap: cmake is unhappy if compiler can't link to stdlib
+	local nolib_flags=( -nodefaultlibs -lc )
+	if ! test_compiler; then
+		if test_compiler "${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=(
+		-DPython3_EXECUTABLE="${PYTHON}"
+		-DLLVM_ENABLE_RUNTIMES=libcxx
+		-DLLVM_INCLUDE_TESTS=OFF
+		-DLLVM_LIBDIR_SUFFIX=${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=${want_gcc_s}
+		-DLIBCXX_INCLUDE_BENCHMARKS=OFF
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DLIBCXX_USE_COMPILER_RT=${want_compiler_rt}
+		-DLIBCXX_HAS_ATOMIC_LIB=${want_gcc_s}
+		-DLIBCXX_TARGET_TRIPLE="${CHOST}"
+		-DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
+	)
+
+	if use test; then
+		local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+		[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags);--param=cxx_under_test=${clang_path}"
+			-DLIBCXX_LINK_TESTS_WITH_SHARED_LIBCXXABI=ON
+			-DPython3_EXECUTABLE="${PYTHON}"
+		)
+	fi
+	cmake_src_configure
+}
+
+multilib_src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-cxx
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(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=$(usex libcxxabi "libc++abi.a" "libsupc++.a")
+
+	# Move it first.
+	mv "${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" "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_src_install
+	if [[ ${CHOST} != *-darwin* ]] ; then
+		gen_shared_ldscript
+		use static-libs && gen_static_ldscript
+	fi
+}
+
+pkg_postinst() {
+	elog "This package (${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."
+}