From b8330d80ce605a72596ccfa1bfc087b9ded559b8 Mon Sep 17 00:00:00 2001
From: V3n3RiX <venerix@koprulu.sector>
Date: Fri, 13 Oct 2023 18:18:15 +0100
Subject: gentoo auto-resync : 13:10:2023 - 18:18:15

---
 sys-libs/libcxx/Manifest                         |   4 +-
 sys-libs/libcxx/libcxx-17.0.2.9999.ebuild        | 204 -----------------------
 sys-libs/libcxx/libcxx-17.0.3.9999.ebuild        | 204 +++++++++++++++++++++++
 sys-libs/libcxx/libcxx-18.0.0_pre20231013.ebuild | 204 +++++++++++++++++++++++
 4 files changed, 411 insertions(+), 205 deletions(-)
 delete mode 100644 sys-libs/libcxx/libcxx-17.0.2.9999.ebuild
 create mode 100644 sys-libs/libcxx/libcxx-17.0.3.9999.ebuild
 create mode 100644 sys-libs/libcxx/libcxx-18.0.0_pre20231013.ebuild

(limited to 'sys-libs/libcxx')

diff --git a/sys-libs/libcxx/Manifest b/sys-libs/libcxx/Manifest
index 562ce6a3fd74..ddba046d1539 100644
--- a/sys-libs/libcxx/Manifest
+++ b/sys-libs/libcxx/Manifest
@@ -12,15 +12,17 @@ DIST llvm-project-17.0.1.src.tar.xz.sig 438 BLAKE2B 3182e3c3a48635fdec39b945ee3b
 DIST llvm-project-17.0.2.src.tar.xz 127833708 BLAKE2B fa9e2e48ce1117063f5cef0aeef85ce84b99bd8fae23022572a6f016eff2ffbf8aab6250b0bdb6e0bbea1c4daf10cecceb18e80496260b5aa81086075d503e12 SHA512 4586224c3f547e8065fa4f0ca3629a1dfed868dfc372ab192d8b9384f0f74dc8cb27dcb6269dc4230202e6a524aae852d98b40fa02ed0393086a162387ea7659
 DIST llvm-project-17.0.2.src.tar.xz.sig 438 BLAKE2B 3ba5d7a09e9de3f38a6f7b5b771b08b1c4e96ea7eda948cfa679598d240fa5211fd37220fbe09e37682212b17fb71b8b5539475edb8ff46d9767054983f670cb SHA512 234276813e3f4b5ee9b1dc640a613fd2e60f1d659f4e089733278d08dd0e208ad37d4d64c9e1edd420b6b87e112458ecec5f76ed9a243c3023b0adbab19ab909
 DIST llvm-project-39fec5457c0925bd39f67f63fe17391584e08258.tar.gz 198361956 BLAKE2B 001b9d9b7997762dcce4f0b1deb94d41c3d840c178ba1e92208782e7e21fdc0041cde359051b2b1b1fc75526ff6504d3b9375ff873831350de359530c944a961 SHA512 b560e71c9855aff9fb5385f9fb30f63fbef074fd695e7cb31847192837a161bfe4808ceb09c514a676ae817616f15fb5a57d325aa9744eaac46b8f4b20b77a13
+DIST llvm-project-5d35273a32d239b7407338e13ed71b59174d6536.tar.gz 198787569 BLAKE2B 7f4f1eb490028e18826a6ebade649a682e433252ceab1f3dcd9e50c34f24e7ef108c3325ec209a4d4fa1ded8e09ebda4980cb9d8ddce8a0d517923d6c38b8f4a SHA512 4d263561fb12cc07a5e8f7ed2f8f22a3645aa959cf963a6a735a9bb93cfc2a51bf7e4d36b54e8425725029cfcfd868dfcc53af95d26d84be72be124d8c564271
 DIST llvm-project-f5cb9cb59d7c9c6ac3d5c41c677f68c9b75d34a3.tar.gz 198113948 BLAKE2B 1688920eb790421f4143e92bd7bd26794a2497e7b445dde6d55b59c9df4b1aebb848833c7cb1b7c273c5e002763f2531a341313500ce207242f992dfe343b988 SHA512 9817e8b7adf7c69d673124e8334c3e511dfd1cc386832c52b2fb0f2517475d29cd98513ad87188a962f9697dfac39ea03f5b2db6c549c307cf3d27b1370ffdf3
 EBUILD libcxx-14.0.6.ebuild 6950 BLAKE2B f4f8068f1b9dd1a8c22abd4acb4206da1dd7bb4eb029723a2edfe8c5db3a6ed74a677ba00c508ff54806a33b60b131ffd4b9729ed0d6d0bf5296a1e53e2ababf SHA512 a602e45046d931f28d2656bd733823d3289a993acd7399c5cd29915e65eb9ae0cb601f2774dad34534299366ecd9c038488e037b13af8b732f254e561f56c592
 EBUILD libcxx-15.0.7-r1.ebuild 5308 BLAKE2B aeeee8aab5d3aa09f6165186eafe5bd2802105f763295d4160d81563779999fa03aca891474cd8eae9755ee43ec73bfb7ae3d9fa6d32c7c01040cc46f85858af SHA512 7780ac83f357ffc9d4fc72d2649b2996b7ba5f9473d75ab56e04ccff99a8811c4d14f69de4024fe6472794dc0ed267ee2f34b9430f4d8ed054c65b018abd1778
 EBUILD libcxx-15.0.7.ebuild 5283 BLAKE2B 09c43241bab7e5015d3dae5466e49fb24337b87a6925116056d4ad9baa048c3f23c61a5e93403addfa97676f733a04ef33cc9238fbed9a4abcf985ad8d939965 SHA512 d90583d3fe5724ed15a91c70241457e9120d848e9cbcce2bfb3f3932d9d36ef726830d76601af530e2e28e552d7ad2049dd74713eb54f6eca55206cb4f35f8e2
 EBUILD libcxx-16.0.6.ebuild 5311 BLAKE2B 6ce4c5d11f98384867feb1832a13f790f5e7a447c7d2cbd0d80ac415744fd880b4812ae29f23e9359223a67632e4f6a49f084a429eb53d324afd18d2fb10992f SHA512 c9a9ec7632986467001614271e6d721d08e6a4edd433284900f65f209a053911f669dfe7c5a7d86ba6210d7daf9fad5b10fbc858317393826aece8956c6b652f
 EBUILD libcxx-17.0.1.ebuild 5296 BLAKE2B f6f2b7f309b6ca1441cf39df6409dcbd0eb4b21732aecb457c39f75ea4488da02fe0327f65f9d3444cb0ef0affd9044edf475089611c8674ae54c974fee15df9 SHA512 58ef159a46db7ddcb3fd4bdffcc9938a7ecea7a961ec047938219519f99924fb703d66aa9dcc1a0bb45940d897b3eeb8d18fb223181c6534c9535081dada4377
-EBUILD libcxx-17.0.2.9999.ebuild 5241 BLAKE2B d2cefdfde25f1f87a3a1419268aa0600dba7a3eb7a62a508b8be403134ab9398e881ba8344753fc5ead6c3eac198eebea07d3554a1d6ee3a5676377b5830729b SHA512 e96c1769afd4927dca8ed02a1add344cfb137d0072651524d4077558b31e9dfd70b6179c86c5aa2cb3c80e5864c5ccdaf867350d3f8f9bf696f92e059db71591
 EBUILD libcxx-17.0.2.ebuild 5296 BLAKE2B f6f2b7f309b6ca1441cf39df6409dcbd0eb4b21732aecb457c39f75ea4488da02fe0327f65f9d3444cb0ef0affd9044edf475089611c8674ae54c974fee15df9 SHA512 58ef159a46db7ddcb3fd4bdffcc9938a7ecea7a961ec047938219519f99924fb703d66aa9dcc1a0bb45940d897b3eeb8d18fb223181c6534c9535081dada4377
+EBUILD libcxx-17.0.3.9999.ebuild 5241 BLAKE2B d2cefdfde25f1f87a3a1419268aa0600dba7a3eb7a62a508b8be403134ab9398e881ba8344753fc5ead6c3eac198eebea07d3554a1d6ee3a5676377b5830729b SHA512 e96c1769afd4927dca8ed02a1add344cfb137d0072651524d4077558b31e9dfd70b6179c86c5aa2cb3c80e5864c5ccdaf867350d3f8f9bf696f92e059db71591
 EBUILD libcxx-18.0.0.9999.ebuild 5241 BLAKE2B d2cefdfde25f1f87a3a1419268aa0600dba7a3eb7a62a508b8be403134ab9398e881ba8344753fc5ead6c3eac198eebea07d3554a1d6ee3a5676377b5830729b SHA512 e96c1769afd4927dca8ed02a1add344cfb137d0072651524d4077558b31e9dfd70b6179c86c5aa2cb3c80e5864c5ccdaf867350d3f8f9bf696f92e059db71591
 EBUILD libcxx-18.0.0_pre20230925.ebuild 5241 BLAKE2B d2cefdfde25f1f87a3a1419268aa0600dba7a3eb7a62a508b8be403134ab9398e881ba8344753fc5ead6c3eac198eebea07d3554a1d6ee3a5676377b5830729b SHA512 e96c1769afd4927dca8ed02a1add344cfb137d0072651524d4077558b31e9dfd70b6179c86c5aa2cb3c80e5864c5ccdaf867350d3f8f9bf696f92e059db71591
 EBUILD libcxx-18.0.0_pre20231002.ebuild 5241 BLAKE2B d2cefdfde25f1f87a3a1419268aa0600dba7a3eb7a62a508b8be403134ab9398e881ba8344753fc5ead6c3eac198eebea07d3554a1d6ee3a5676377b5830729b SHA512 e96c1769afd4927dca8ed02a1add344cfb137d0072651524d4077558b31e9dfd70b6179c86c5aa2cb3c80e5864c5ccdaf867350d3f8f9bf696f92e059db71591
+EBUILD libcxx-18.0.0_pre20231013.ebuild 5241 BLAKE2B d2cefdfde25f1f87a3a1419268aa0600dba7a3eb7a62a508b8be403134ab9398e881ba8344753fc5ead6c3eac198eebea07d3554a1d6ee3a5676377b5830729b SHA512 e96c1769afd4927dca8ed02a1add344cfb137d0072651524d4077558b31e9dfd70b6179c86c5aa2cb3c80e5864c5ccdaf867350d3f8f9bf696f92e059db71591
 MISC metadata.xml 718 BLAKE2B 3cc1e43a6f1ada368cfc0bf8aaf49007f6792062b684ab9299b5180d778b158325b6931169b52dd14e85ae9ad6dc1a03be323b814fb920fe8434ad86425d699c SHA512 c2cef3e481c0c3db7de6de8c0a5aff42a1e7fe81155d99f1f0f0988f6d5ca041f787a27a2dde0073037d59e082e2f6da7eefe1303f1c1837ebc12e8e0d28729f
diff --git a/sys-libs/libcxx/libcxx-17.0.2.9999.ebuild b/sys-libs/libcxx/libcxx-17.0.2.9999.ebuild
deleted file mode 100644
index bb005b4d8ec8..000000000000
--- a/sys-libs/libcxx/libcxx-17.0.2.9999.ebuild
+++ /dev/null
@@ -1,204 +0,0 @@
-# Copyright 1999-2023 Gentoo Authors
-# Distributed under the terms of the GNU General Public License v2
-
-EAPI=8
-
-PYTHON_COMPAT=( python3_{10..12} )
-inherit cmake-multilib flag-o-matic 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="+clang +libcxxabi +static-libs test"
-REQUIRED_USE="test? ( clang )"
-RESTRICT="!test? ( test )"
-
-RDEPEND="
-	libcxxabi? (
-		~sys-libs/libcxxabi-${PV}[static-libs?,${MULTILIB_USEDEP}]
-	)
-	!libcxxabi? ( >=sys-devel/gcc-4.7:=[cxx] )
-"
-DEPEND="
-	${RDEPEND}
-	sys-devel/llvm:${LLVM_MAJOR}
-"
-BDEPEND="
-	clang? (
-		sys-devel/clang:${LLVM_MAJOR}
-	)
-	!test? (
-		${PYTHON_DEPS}
-	)
-	test? (
-		>=dev-util/cmake-3.16
-		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.org_set_globals
-
-python_check_deps() {
-	use test || return 0
-	python_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 [[ ${CHOST} != *-darwin* ]] || has_version sys-devel/llvm; then
-		LLVM_MAX_SLOT=${LLVM_MAJOR} 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="${EPREFIX}/usr/include/c++/v1"
-	else
-		local gcc_inc="${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() {
-	if use clang; then
-		local -x CC=${CHOST}-clang
-		local -x CXX=${CHOST}-clang++
-		strip-unsupported-flags
-	fi
-
-	# link to compiler-rt
-	local use_compiler_rt=OFF
-	[[ $(tc-get-c-rtlib) == compiler-rt ]] && use_compiler_rt=ON
-
-	# bootstrap: cmake is unhappy if compiler can't link to stdlib
-	local nolib_flags=( -nodefaultlibs -lc )
-	if ! test_compiler; then
-		if test_compiler "${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=(
-		-DCMAKE_CXX_COMPILER_TARGET="${CHOST}"
-		-DPython3_EXECUTABLE="${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=$(usex elibc_musl)
-		-DLIBCXX_INCLUDE_BENCHMARKS=OFF
-		-DLIBCXX_INCLUDE_TESTS=$(usex test)
-		-DLIBCXX_USE_COMPILER_RT=${use_compiler_rt}
-	)
-
-	if use test; then
-		mycmakeargs+=(
-			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
-			-DLLVM_LIT_ARGS="$(get_lit_flags)"
-			-DPython3_EXECUTABLE="${PYTHON}"
-		)
-	fi
-	cmake_src_configure
-}
-
-multilib_src_compile() {
-	cmake_src_compile
-	if [[ ${CHOST} != *-darwin* ]] ; then
-		gen_shared_ldscript
-		use static-libs && gen_static_ldscript
-	fi
-}
-
-multilib_src_test() {
-	local -x LIT_PRESERVES_TMP=1
-	cmake_build check-cxx
-}
-
-multilib_src_install() {
-	cmake_src_install
-	# since we've replaced libc++.{a,so} with ldscripts, now we have to
-	# install the extra symlinks
-	if [[ ${CHOST} != *-darwin* ]] ; then
-		dolib.so lib/libc++_shared.so
-		use static-libs && dolib.a lib/libc++_static.a
-	fi
-}
-
-# Usage: deps
-gen_ldscript() {
-	local output_format
-	output_format=$($(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() {
-	# Move it first.
-	mv lib/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
-		$(usex libcxxabi libc++abi.a libsupc++.a)
-	)
-	# On Linux/glibc it does not link without libpthread or libdl. It is
-	# fine on FreeBSD.
-	use elibc_glibc && deps+=( libpthread.a libdl.a )
-
-	gen_ldscript "${deps[*]}" > lib/libc++.a || die
-}
-
-gen_shared_ldscript() {
-	# Move it first.
-	mv lib/libc++{,_shared}.so || die
-	local deps=(
-		libc++_shared.so
-		# libsupc++ doesn't have a shared version
-		$(usex libcxxabi libc++abi.so libsupc++.a)
-	)
-
-	gen_ldscript "${deps[*]}" > lib/libc++.so || die
-}
diff --git a/sys-libs/libcxx/libcxx-17.0.3.9999.ebuild b/sys-libs/libcxx/libcxx-17.0.3.9999.ebuild
new file mode 100644
index 000000000000..bb005b4d8ec8
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-17.0.3.9999.ebuild
@@ -0,0 +1,204 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..12} )
+inherit cmake-multilib flag-o-matic 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="+clang +libcxxabi +static-libs test"
+REQUIRED_USE="test? ( clang )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	libcxxabi? (
+		~sys-libs/libcxxabi-${PV}[static-libs?,${MULTILIB_USEDEP}]
+	)
+	!libcxxabi? ( >=sys-devel/gcc-4.7:=[cxx] )
+"
+DEPEND="
+	${RDEPEND}
+	sys-devel/llvm:${LLVM_MAJOR}
+"
+BDEPEND="
+	clang? (
+		sys-devel/clang:${LLVM_MAJOR}
+	)
+	!test? (
+		${PYTHON_DEPS}
+	)
+	test? (
+		>=dev-util/cmake-3.16
+		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.org_set_globals
+
+python_check_deps() {
+	use test || return 0
+	python_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 [[ ${CHOST} != *-darwin* ]] || has_version sys-devel/llvm; then
+		LLVM_MAX_SLOT=${LLVM_MAJOR} 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="${EPREFIX}/usr/include/c++/v1"
+	else
+		local gcc_inc="${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() {
+	if use clang; then
+		local -x CC=${CHOST}-clang
+		local -x CXX=${CHOST}-clang++
+		strip-unsupported-flags
+	fi
+
+	# link to compiler-rt
+	local use_compiler_rt=OFF
+	[[ $(tc-get-c-rtlib) == compiler-rt ]] && use_compiler_rt=ON
+
+	# bootstrap: cmake is unhappy if compiler can't link to stdlib
+	local nolib_flags=( -nodefaultlibs -lc )
+	if ! test_compiler; then
+		if test_compiler "${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=(
+		-DCMAKE_CXX_COMPILER_TARGET="${CHOST}"
+		-DPython3_EXECUTABLE="${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=$(usex elibc_musl)
+		-DLIBCXX_INCLUDE_BENCHMARKS=OFF
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DLIBCXX_USE_COMPILER_RT=${use_compiler_rt}
+	)
+
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags)"
+			-DPython3_EXECUTABLE="${PYTHON}"
+		)
+	fi
+	cmake_src_configure
+}
+
+multilib_src_compile() {
+	cmake_src_compile
+	if [[ ${CHOST} != *-darwin* ]] ; then
+		gen_shared_ldscript
+		use static-libs && gen_static_ldscript
+	fi
+}
+
+multilib_src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-cxx
+}
+
+multilib_src_install() {
+	cmake_src_install
+	# since we've replaced libc++.{a,so} with ldscripts, now we have to
+	# install the extra symlinks
+	if [[ ${CHOST} != *-darwin* ]] ; then
+		dolib.so lib/libc++_shared.so
+		use static-libs && dolib.a lib/libc++_static.a
+	fi
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(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() {
+	# Move it first.
+	mv lib/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
+		$(usex libcxxabi libc++abi.a libsupc++.a)
+	)
+	# On Linux/glibc it does not link without libpthread or libdl. It is
+	# fine on FreeBSD.
+	use elibc_glibc && deps+=( libpthread.a libdl.a )
+
+	gen_ldscript "${deps[*]}" > lib/libc++.a || die
+}
+
+gen_shared_ldscript() {
+	# Move it first.
+	mv lib/libc++{,_shared}.so || die
+	local deps=(
+		libc++_shared.so
+		# libsupc++ doesn't have a shared version
+		$(usex libcxxabi libc++abi.so libsupc++.a)
+	)
+
+	gen_ldscript "${deps[*]}" > lib/libc++.so || die
+}
diff --git a/sys-libs/libcxx/libcxx-18.0.0_pre20231013.ebuild b/sys-libs/libcxx/libcxx-18.0.0_pre20231013.ebuild
new file mode 100644
index 000000000000..bb005b4d8ec8
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-18.0.0_pre20231013.ebuild
@@ -0,0 +1,204 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..12} )
+inherit cmake-multilib flag-o-matic 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="+clang +libcxxabi +static-libs test"
+REQUIRED_USE="test? ( clang )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	libcxxabi? (
+		~sys-libs/libcxxabi-${PV}[static-libs?,${MULTILIB_USEDEP}]
+	)
+	!libcxxabi? ( >=sys-devel/gcc-4.7:=[cxx] )
+"
+DEPEND="
+	${RDEPEND}
+	sys-devel/llvm:${LLVM_MAJOR}
+"
+BDEPEND="
+	clang? (
+		sys-devel/clang:${LLVM_MAJOR}
+	)
+	!test? (
+		${PYTHON_DEPS}
+	)
+	test? (
+		>=dev-util/cmake-3.16
+		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.org_set_globals
+
+python_check_deps() {
+	use test || return 0
+	python_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 [[ ${CHOST} != *-darwin* ]] || has_version sys-devel/llvm; then
+		LLVM_MAX_SLOT=${LLVM_MAJOR} 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="${EPREFIX}/usr/include/c++/v1"
+	else
+		local gcc_inc="${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() {
+	if use clang; then
+		local -x CC=${CHOST}-clang
+		local -x CXX=${CHOST}-clang++
+		strip-unsupported-flags
+	fi
+
+	# link to compiler-rt
+	local use_compiler_rt=OFF
+	[[ $(tc-get-c-rtlib) == compiler-rt ]] && use_compiler_rt=ON
+
+	# bootstrap: cmake is unhappy if compiler can't link to stdlib
+	local nolib_flags=( -nodefaultlibs -lc )
+	if ! test_compiler; then
+		if test_compiler "${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=(
+		-DCMAKE_CXX_COMPILER_TARGET="${CHOST}"
+		-DPython3_EXECUTABLE="${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=$(usex elibc_musl)
+		-DLIBCXX_INCLUDE_BENCHMARKS=OFF
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DLIBCXX_USE_COMPILER_RT=${use_compiler_rt}
+	)
+
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags)"
+			-DPython3_EXECUTABLE="${PYTHON}"
+		)
+	fi
+	cmake_src_configure
+}
+
+multilib_src_compile() {
+	cmake_src_compile
+	if [[ ${CHOST} != *-darwin* ]] ; then
+		gen_shared_ldscript
+		use static-libs && gen_static_ldscript
+	fi
+}
+
+multilib_src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-cxx
+}
+
+multilib_src_install() {
+	cmake_src_install
+	# since we've replaced libc++.{a,so} with ldscripts, now we have to
+	# install the extra symlinks
+	if [[ ${CHOST} != *-darwin* ]] ; then
+		dolib.so lib/libc++_shared.so
+		use static-libs && dolib.a lib/libc++_static.a
+	fi
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(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() {
+	# Move it first.
+	mv lib/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
+		$(usex libcxxabi libc++abi.a libsupc++.a)
+	)
+	# On Linux/glibc it does not link without libpthread or libdl. It is
+	# fine on FreeBSD.
+	use elibc_glibc && deps+=( libpthread.a libdl.a )
+
+	gen_ldscript "${deps[*]}" > lib/libc++.a || die
+}
+
+gen_shared_ldscript() {
+	# Move it first.
+	mv lib/libc++{,_shared}.so || die
+	local deps=(
+		libc++_shared.so
+		# libsupc++ doesn't have a shared version
+		$(usex libcxxabi libc++abi.so libsupc++.a)
+	)
+
+	gen_ldscript "${deps[*]}" > lib/libc++.so || die
+}
-- 
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