13 files changed, 1013 insertions, 0 deletions
diff --git a/sys-libs/Manifest.gz b/sys-libs/Manifest.gz
index c87614caeb62..eb95f646f47a 100644
--- a/sys-libs/Manifest.gz
+++ b/sys-libs/Manifest.gz
diff --git a/sys-libs/compiler-rt-sanitizers/Manifest b/sys-libs/compiler-rt-sanitizers/Manifest
index 593245fa6622..a541ce7b2555 100644
--- a/sys-libs/compiler-rt-sanitizers/Manifest
+++ b/sys-libs/compiler-rt-sanitizers/Manifest
@@ -10,6 +10,7 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-5237193b87721134541f228e28edfd544a9c8ac8.tar.gz 201404340 BLAKE2B f028b8b100721202007e3106d8ee91bcf2ac90588f9268ec835dc4ea3941363d4b796338146c65d1a9e88957d18738030f713b3fed770616c79cb40043e706db SHA512 40a4d4f99f1a690a0f8737261aeeaa61af6124eeadcb6bab5c3828e88b36b8cce42a8caee6d3f01e675047c59b62210de017d207e341f680eff97758f798ad45
 DIST llvm-project-6a4489a73337907d52e7eaf3716f3de9008e6e53.tar.gz 201703120 BLAKE2B 7de783df15ff30ab85aad2f02a5a043d09b18dd7b212c19e21b045870497e2b17a53527523cd533c4ef61b22d605026a9322d2f8d02f0d4f76ed26ab693b788c SHA512 ffc31d7037255d608717faff84e858d63b37abed5659d66599864ae44ed00fc5902e9851eb1b8c848b500623681ef5782b39ad2bf8bcf96ac4f35032efde1490
+DIST llvm-project-d37ced88809cb4d2df57ec80887b3f8801ca719b.tar.gz 203826420 BLAKE2B 58448df837f2119720a36b837d0e4f2b2fc00da5658706b193b9d2d180cf0f6c5eb79a9cc0fa9d94310996a95210115a5a46371bd8537f16e105adea14a72399 SHA512 1348e5bf736acaeebf0ae0f613973e6c2d439d360c2272bb4ab112e579b12c297970bb765fd774c768aa55a922c93048b1d8ae6bfd636b241fa86f9427cc2069
 EBUILD compiler-rt-sanitizers-14.0.6.ebuild 6526 BLAKE2B 371b7d7bfbcacce1c04cf039b15f49bf5c8fb7de0352c4f477b92d1efe0c70442770ec0c6b60572cf5877b5c14492328cf727b2aa5c1dea761eb909aa1e1df6c SHA512 ee1f054abb9954eedd5b098afb1eb741cd2d7b1b329ef66ed3f25f8ed050227a31925852e3d893b0a9913e2ef2ac34efe89c66c19b562c586f7c0352a10a5814
 EBUILD compiler-rt-sanitizers-15.0.7.ebuild 6578 BLAKE2B 79b9477f9f426c7e5ffc07fe9e2abc86ee568d8e081ac5e5e3da3e3e169920fe8c0ce34f9a8ac03a4389f27ecb0b0ff7f5cf91622d614e03300f17ea97d20859 SHA512 9d23f6974edbe69e5d9fa53a3885e8e44741b5e5d90b0e72c6d191b70827d1e590a7c5a3373bc4fb4945a50db0eea5e119baeaeea956c6d92bb087410ce919b0
 EBUILD compiler-rt-sanitizers-16.0.6.ebuild 6546 BLAKE2B a57ff221344f88afa92722a883c5c5eec064b2a9691f2262e633914a75df013c295352b1b1fad83b7fc7579c7d59d6e0f04bc63e1f27556e950438f5f2e72fe7 SHA512 32641d64f2a370bd4b907ff05ebf975d3e149e9bc6372cd60e46ef04463f374984a62002cab76e58acee31f4fcbd0138749bab5c5aa1afd29a8713083b90a402
@@ -17,4 +18,5 @@ EBUILD compiler-rt-sanitizers-17.0.6.ebuild 6383 BLAKE2B c72113466b41764f42ce634
 EBUILD compiler-rt-sanitizers-18.0.0.9999.ebuild 6293 BLAKE2B 27ba05686e239e9b490d1a1cad3a19509f8f61201133c3070b7f320c9fd8e1ead0b136988b815e7cff2e9d42226fca227b4a39dbaa3973d2d364ab3439519879 SHA512 25af556f5e8c6b08ab7dc6910454836d19f2c0651556ffb6d4c0983b73f1f4a66b97d1b4e0f5dd597e29b6d367b7376daf41bc09fe094b8327feebf1eaab719f
 EBUILD compiler-rt-sanitizers-18.0.0_pre20231119.ebuild 6238 BLAKE2B 49947c45c94553c2bfd2d0926180422c3485558dcd4d73ad9155eae53757e7ebbb74ad11155a8e3a4a230bd2bd796943ed1f962aa1286391b70d43e6dd56d35f SHA512 51f803a8510300b0771d885f77e86c8d364cac4dad901a4cccf6b0e428798dd7c8135617a09775fe6eeb888e5e4c68be9bcb9c57f4ae0b3b4e0b046f5b337012
 EBUILD compiler-rt-sanitizers-18.0.0_pre20231129.ebuild 6293 BLAKE2B 27ba05686e239e9b490d1a1cad3a19509f8f61201133c3070b7f320c9fd8e1ead0b136988b815e7cff2e9d42226fca227b4a39dbaa3973d2d364ab3439519879 SHA512 25af556f5e8c6b08ab7dc6910454836d19f2c0651556ffb6d4c0983b73f1f4a66b97d1b4e0f5dd597e29b6d367b7376daf41bc09fe094b8327feebf1eaab719f
+EBUILD compiler-rt-sanitizers-18.0.0_pre20231215.ebuild 6293 BLAKE2B 27ba05686e239e9b490d1a1cad3a19509f8f61201133c3070b7f320c9fd8e1ead0b136988b815e7cff2e9d42226fca227b4a39dbaa3973d2d364ab3439519879 SHA512 25af556f5e8c6b08ab7dc6910454836d19f2c0651556ffb6d4c0983b73f1f4a66b97d1b4e0f5dd597e29b6d367b7376daf41bc09fe094b8327feebf1eaab719f
 MISC metadata.xml 1412 BLAKE2B 75675507000fa6a6b8182e6b45a08a2716ae7fb9a7e3428dc8420464e4c1d1bdb5bea62cc2f553c579de5a4faa752b35cb3529d980fb07a055ff4ddf6e752707 SHA512 f05ea5168b923db72f4f5b53e9b748ebbcdae9eff09d86323313055933b47fc0089e1b2d73cd997d73dcfb2dca032344955816425fbddc09d27ca751463aadbb
diff --git a/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-18.0.0_pre20231215.ebuild b/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-18.0.0_pre20231215.ebuild
new file mode 100644
index 000000000000..9b46a98372e8
--- /dev/null
+++ b/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-18.0.0_pre20231215.ebuild
@@ -0,0 +1,217 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..12} )
+inherit check-reqs cmake flag-o-matic llvm llvm.org python-any-r1
+
+DESCRIPTION="Compiler runtime libraries for clang (sanitizers & xray)"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="${LLVM_MAJOR}"
+IUSE="+abi_x86_32 abi_x86_64 +clang +debug test"
+# base targets
+IUSE+=" +libfuzzer +memprof +orc +profile +xray"
+# sanitizer targets, keep in sync with config-ix.cmake
+# NB: ubsan, scudo deliberately match two entries
+SANITIZER_FLAGS=(
+	asan dfsan lsan msan hwasan tsan ubsan safestack cfi scudo
+	shadowcallstack gwp-asan
+)
+IUSE+=" ${SANITIZER_FLAGS[@]/#/+}"
+REQUIRED_USE="
+	|| ( ${SANITIZER_FLAGS[*]} libfuzzer orc profile xray )
+	test? (
+		cfi? ( ubsan )
+		gwp-asan? ( scudo )
+	)
+"
+RESTRICT="
+	!clang? ( test )
+	!test? ( test )
+"
+
+DEPEND="
+	sys-devel/llvm:${LLVM_MAJOR}
+	virtual/libcrypt[abi_x86_32(-)?,abi_x86_64(-)?]
+"
+BDEPEND="
+	>=dev-util/cmake-3.16
+	clang? ( sys-devel/clang )
+	elibc_glibc? ( net-libs/libtirpc )
+	test? (
+		$(python_gen_any_dep ">=dev-python/lit-15[\${PYTHON_USEDEP}]")
+		=sys-devel/clang-${LLVM_VERSION}*:${LLVM_MAJOR}
+		sys-libs/compiler-rt:${LLVM_MAJOR}
+	)
+	!test? (
+		${PYTHON_DEPS}
+	)
+"
+
+LLVM_COMPONENTS=( compiler-rt cmake llvm/cmake )
+LLVM_TEST_COMPONENTS=( llvm/lib/Testing/Support third-party )
+llvm.org_set_globals
+
+python_check_deps() {
+	use test || return 0
+	python_has_version ">=dev-python/lit-15[${PYTHON_USEDEP}]"
+}
+
+check_space() {
+	if use test; then
+		local CHECKREQS_DISK_BUILD=11G
+		check-reqs_pkg_pretend
+	fi
+}
+
+pkg_pretend() {
+	check_space
+}
+
+pkg_setup() {
+	check_space
+	LLVM_MAX_SLOT=${LLVM_MAJOR} llvm_pkg_setup
+	python-any-r1_pkg_setup
+}
+
+src_prepare() {
+	sed -i -e 's:-Werror::' lib/tsan/go/buildgo.sh || die
+
+	local flag
+	for flag in "${SANITIZER_FLAGS[@]}"; do
+		if ! use "${flag}"; then
+			local cmake_flag=${flag/-/_}
+			sed -i -e "/COMPILER_RT_HAS_${cmake_flag^^}/s:TRUE:FALSE:" \
+				cmake/config-ix.cmake || die
+		fi
+	done
+
+	# TODO: fix these tests to be skipped upstream
+	if use asan && ! use profile; then
+		rm test/asan/TestCases/asan_and_llvm_coverage_test.cpp || die
+	fi
+	if use ubsan && ! use cfi; then
+		> test/cfi/CMakeLists.txt || die
+	fi
+	# hangs, sigh
+	rm test/tsan/getline_nohang.cpp || die
+
+	llvm.org_src_prepare
+}
+
+src_configure() {
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+
+	# pre-set since we need to pass it to cmake
+	BUILD_DIR=${WORKDIR}/compiler-rt_build
+
+	if use clang; then
+		local -x CC=${CHOST}-clang
+		local -x CXX=${CHOST}-clang++
+		strip-unsupported-flags
+	fi
+
+	local flag want_sanitizer=OFF
+	for flag in "${SANITIZER_FLAGS[@]}"; do
+		if use "${flag}"; then
+			want_sanitizer=ON
+			break
+		fi
+	done
+
+	local mycmakeargs=(
+		-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${LLVM_MAJOR}"
+		# use a build dir structure consistent with install
+		# this makes it possible to easily deploy test-friendly clang
+		-DCOMPILER_RT_OUTPUT_DIR="${BUILD_DIR}/lib/clang/${LLVM_MAJOR}"
+
+		-DCOMPILER_RT_INCLUDE_TESTS=$(usex test)
+		# builtins & crt installed by sys-libs/compiler-rt
+		-DCOMPILER_RT_BUILD_BUILTINS=OFF
+		-DCOMPILER_RT_BUILD_CRT=OFF
+		-DCOMPILER_RT_BUILD_LIBFUZZER=$(usex libfuzzer)
+		-DCOMPILER_RT_BUILD_MEMPROF=$(usex memprof)
+		-DCOMPILER_RT_BUILD_ORC=$(usex orc)
+		-DCOMPILER_RT_BUILD_PROFILE=$(usex profile)
+		-DCOMPILER_RT_BUILD_SANITIZERS="${want_sanitizer}"
+		-DCOMPILER_RT_BUILD_XRAY=$(usex xray)
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+
+	if use amd64; then
+		mycmakeargs+=(
+			-DCAN_TARGET_i386=$(usex abi_x86_32)
+			-DCAN_TARGET_x86_64=$(usex abi_x86_64)
+		)
+	fi
+
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags)"
+
+			# they are created during src_test()
+			-DCOMPILER_RT_TEST_COMPILER="${BUILD_DIR}/lib/llvm/${LLVM_MAJOR}/bin/clang"
+			-DCOMPILER_RT_TEST_CXX_COMPILER="${BUILD_DIR}/lib/llvm/${LLVM_MAJOR}/bin/clang++"
+		)
+
+		# same flags are passed for build & tests, so we need to strip
+		# them down to a subset supported by clang
+		CC=${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin/clang \
+		CXX=${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin/clang++ \
+		strip-unsupported-flags
+	fi
+
+	if use prefix && [[ "${CHOST}" == *-darwin* ]] ; then
+		mycmakeargs+=(
+			# setting -isysroot is disabled with compiler-rt-prefix-paths.patch
+			# this allows adding arm64 support using SDK in EPREFIX
+			-DDARWIN_macosx_CACHED_SYSROOT="${EPREFIX}/MacOSX.sdk"
+			# Set version based on the SDK in EPREFIX
+			# This disables i386 for SDK >= 10.15
+			# Will error if has_use tsan and SDK < 10.12
+			-DDARWIN_macosx_OVERRIDE_SDK_VERSION="$(realpath ${EPREFIX}/MacOSX.sdk | sed -e 's/.*MacOSX\(.*\)\.sdk/\1/')"
+			# Use our libtool instead of looking it up with xcrun
+			-DCMAKE_LIBTOOL="${EPREFIX}/usr/bin/${CHOST}-libtool"
+		)
+	fi
+
+	cmake_src_configure
+
+	if use test; then
+		local sys_dir=( "${EPREFIX}"/usr/lib/clang/${LLVM_MAJOR}/lib/* )
+		[[ -e ${sys_dir} ]] || die "Unable to find ${sys_dir}"
+		[[ ${#sys_dir[@]} -eq 1 ]] || die "Non-deterministic compiler-rt install: ${sys_dir[*]}"
+
+		# copy clang over since resource_dir is located relatively to binary
+		# therefore, we can put our new libraries in it
+		mkdir -p "${BUILD_DIR}"/lib/{llvm/${LLVM_MAJOR}/{bin,$(get_libdir)},clang/${LLVM_MAJOR}/include} || die
+		cp "${EPREFIX}"/usr/lib/llvm/${LLVM_MAJOR}/bin/clang{,++} \
+			"${BUILD_DIR}"/lib/llvm/${LLVM_MAJOR}/bin/ || die
+		cp "${EPREFIX}"/usr/lib/clang/${LLVM_MAJOR}/include/*.h \
+			"${BUILD_DIR}"/lib/clang/${LLVM_MAJOR}/include/ || die
+		cp "${sys_dir}"/*builtins*.a \
+			"${BUILD_DIR}/lib/clang/${LLVM_MAJOR}/lib/${sys_dir##*/}/" || die
+		# we also need LLVMgold.so for gold-based tests
+		if [[ -f ${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/$(get_libdir)/LLVMgold.so ]]; then
+			ln -s "${EPREFIX}"/usr/lib/llvm/${LLVM_MAJOR}/$(get_libdir)/LLVMgold.so \
+				"${BUILD_DIR}"/lib/llvm/${LLVM_MAJOR}/$(get_libdir)/ || die
+		fi
+	fi
+}
+
+src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	# disable sandbox to have it stop clobbering LD_PRELOAD
+	local -x SANDBOX_ON=0
+	# wipe LD_PRELOAD to make ASAN happy
+	local -x LD_PRELOAD=
+
+	cmake_build check-all
+}
diff --git a/sys-libs/compiler-rt/Manifest b/sys-libs/compiler-rt/Manifest
index f150189abf2f..bf39ced0743e 100644
--- a/sys-libs/compiler-rt/Manifest
+++ b/sys-libs/compiler-rt/Manifest
@@ -12,6 +12,7 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-5237193b87721134541f228e28edfd544a9c8ac8.tar.gz 201404340 BLAKE2B f028b8b100721202007e3106d8ee91bcf2ac90588f9268ec835dc4ea3941363d4b796338146c65d1a9e88957d18738030f713b3fed770616c79cb40043e706db SHA512 40a4d4f99f1a690a0f8737261aeeaa61af6124eeadcb6bab5c3828e88b36b8cce42a8caee6d3f01e675047c59b62210de017d207e341f680eff97758f798ad45
 DIST llvm-project-6a4489a73337907d52e7eaf3716f3de9008e6e53.tar.gz 201703120 BLAKE2B 7de783df15ff30ab85aad2f02a5a043d09b18dd7b212c19e21b045870497e2b17a53527523cd533c4ef61b22d605026a9322d2f8d02f0d4f76ed26ab693b788c SHA512 ffc31d7037255d608717faff84e858d63b37abed5659d66599864ae44ed00fc5902e9851eb1b8c848b500623681ef5782b39ad2bf8bcf96ac4f35032efde1490
+DIST llvm-project-d37ced88809cb4d2df57ec80887b3f8801ca719b.tar.gz 203826420 BLAKE2B 58448df837f2119720a36b837d0e4f2b2fc00da5658706b193b9d2d180cf0f6c5eb79a9cc0fa9d94310996a95210115a5a46371bd8537f16e105adea14a72399 SHA512 1348e5bf736acaeebf0ae0f613973e6c2d439d360c2272bb4ab112e579b12c297970bb765fd774c768aa55a922c93048b1d8ae6bfd636b241fa86f9427cc2069
 EBUILD compiler-rt-14.0.6-r1.ebuild 4248 BLAKE2B 56b00f1c57cdaf1cd6dd7f15e13c714461001c0c2fb25e565c1677745e3fe6e61714e2f037814fef3eb32ef6866d517c391cb5f63c852ed132d74b1b5b7ef393 SHA512 31cd40fe6c58a6a653d36e99586230c7686ccb2bcdfa1c8ead4331dec2fd8dc53afc2a1e9bdf165dc5b4f7580c8cd25bc7a68acfa9c881fd775187bd82e28f11
 EBUILD compiler-rt-15.0.7.ebuild 4260 BLAKE2B ae8a86217b480bab08dc99d4c5a648bf99a0ef91fb41233956b4a5d1b10d5ed6b3c14d9c02c43e2c0b11dd19f4773ca995c113e48b14475b95b7ee7b821a72d1 SHA512 79da724a1d2483af0dbcc792d008fe994c4fe075db31c7dfcc64192005427137f0157e81345a4027e5a8ba9104f662bc51bf492bca96e1b46c35a44a1849ab84
 EBUILD compiler-rt-16.0.6-r4.ebuild 5236 BLAKE2B 4a3d56946ebefab29b915a864b78d0f8caf8f358fd1929961d76282c34eb9b90bf8a58eeb976637aa918c9bfea9c58144cac0f56ee3fb478e38c6991810f9f0c SHA512 99cf91b7d1de3795d2a85b6d2edb71730ec58a1d69871c1f11ca5ae84ce52a8c59f565866f2296314a5b35e574efb74ad83b07b5c319e325cffe895f59fbc3f2
@@ -20,4 +21,5 @@ EBUILD compiler-rt-17.0.6.ebuild 5233 BLAKE2B ba68857b4e57e455acbd6936d109bbf2d0
 EBUILD compiler-rt-18.0.0.9999.ebuild 5123 BLAKE2B 34e2efe7cd03de9a7bce246735d016e44eb5b41a4b084bff55ea1fad9048bb9fef6f310f1f113975dc54fd16f8828157a3a3e0e630eadd27dd48edc8c036ae7a SHA512 465d0c7b3b8c15e193c7b122d1feb993a13d02dc450aa652c80f4fa31b53c9c3cd257003c98910e1a0a2448cbe68939d179466d6b16c5a0e7a5302feda255662
 EBUILD compiler-rt-18.0.0_pre20231119.ebuild 5123 BLAKE2B 34e2efe7cd03de9a7bce246735d016e44eb5b41a4b084bff55ea1fad9048bb9fef6f310f1f113975dc54fd16f8828157a3a3e0e630eadd27dd48edc8c036ae7a SHA512 465d0c7b3b8c15e193c7b122d1feb993a13d02dc450aa652c80f4fa31b53c9c3cd257003c98910e1a0a2448cbe68939d179466d6b16c5a0e7a5302feda255662
 EBUILD compiler-rt-18.0.0_pre20231129.ebuild 5123 BLAKE2B 34e2efe7cd03de9a7bce246735d016e44eb5b41a4b084bff55ea1fad9048bb9fef6f310f1f113975dc54fd16f8828157a3a3e0e630eadd27dd48edc8c036ae7a SHA512 465d0c7b3b8c15e193c7b122d1feb993a13d02dc450aa652c80f4fa31b53c9c3cd257003c98910e1a0a2448cbe68939d179466d6b16c5a0e7a5302feda255662
+EBUILD compiler-rt-18.0.0_pre20231215.ebuild 5123 BLAKE2B 34e2efe7cd03de9a7bce246735d016e44eb5b41a4b084bff55ea1fad9048bb9fef6f310f1f113975dc54fd16f8828157a3a3e0e630eadd27dd48edc8c036ae7a SHA512 465d0c7b3b8c15e193c7b122d1feb993a13d02dc450aa652c80f4fa31b53c9c3cd257003c98910e1a0a2448cbe68939d179466d6b16c5a0e7a5302feda255662
 MISC metadata.xml 416 BLAKE2B 79a58249c94b605ba57f346c4e05b43853cf6cfb8bb65a4f4e3c44039cccfdb83dd31bfaaaf398bcbdc393efabdfc7ed186fe775976c46227e74decf2c8f4fb2 SHA512 ce30c79a575e5933effb1fec36f9a4ef02d9f97f312feb39c55a88cbda9a1bae1d7af2ec4ad5f66212cbb2cdbfb26f1a436689f16f410153c9d65eb010264c48
diff --git a/sys-libs/compiler-rt/compiler-rt-18.0.0_pre20231215.ebuild b/sys-libs/compiler-rt/compiler-rt-18.0.0_pre20231215.ebuild
new file mode 100644
index 000000000000..9c46e6737daa
--- /dev/null
+++ b/sys-libs/compiler-rt/compiler-rt-18.0.0_pre20231215.ebuild
@@ -0,0 +1,176 @@
+# 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 crossdev flag-o-matic llvm llvm.org python-any-r1 toolchain-funcs
+
+DESCRIPTION="Compiler runtime library for clang (built-in part)"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="${LLVM_MAJOR}"
+IUSE="+abi_x86_32 abi_x86_64 +clang +debug test"
+RESTRICT="!test? ( test ) !clang? ( test )"
+
+DEPEND="
+	sys-devel/llvm:${LLVM_MAJOR}
+"
+BDEPEND="
+	>=dev-util/cmake-3.16
+	clang? ( sys-devel/clang )
+	test? (
+		$(python_gen_any_dep ">=dev-python/lit-15[\${PYTHON_USEDEP}]")
+		=sys-devel/clang-${LLVM_VERSION}*:${LLVM_MAJOR}
+	)
+	!test? (
+		${PYTHON_DEPS}
+	)
+"
+
+LLVM_COMPONENTS=( compiler-rt cmake llvm/cmake )
+llvm.org_set_globals
+
+python_check_deps() {
+	use test || return 0
+	python_has_version ">=dev-python/lit-15[${PYTHON_USEDEP}]"
+}
+
+pkg_pretend() {
+	if ! use clang && ! tc-is-clang; then
+		ewarn "Building using a compiler other than clang may result in broken atomics"
+		ewarn "library. Enable USE=clang unless you have a very good reason not to."
+	fi
+}
+
+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
+
+	if target_is_not_host || tc-is-cross-compiler ; then
+		# strips vars like CFLAGS="-march=x86_64-v3" for non-x86 architectures
+		CHOST=${CTARGET} strip-unsupported-flags
+		# overrides host docs otherwise
+		DOCS=()
+	fi
+	python-any-r1_pkg_setup
+}
+
+test_compiler() {
+	target_is_not_host && return
+	$(tc-getCC) ${CFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c - \
+		<<<'int main() { return 0; }' &>/dev/null
+}
+
+src_configure() {
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+
+	# pre-set since we need to pass it to cmake
+	BUILD_DIR=${WORKDIR}/${P}_build
+
+	if use clang && ! is_crosspkg; then
+		# Only do this conditionally to allow overriding with
+		# e.g. CC=clang-13 in case of breakage
+		if ! tc-is-clang ; then
+			local -x CC=${CHOST}-clang
+			local -x CXX=${CHOST}-clang++
+		fi
+
+		strip-unsupported-flags
+	fi
+
+	if ! is_crosspkg && ! test_compiler ; then
+		local nolib_flags=( -nodefaultlibs -lc )
+
+		if test_compiler "${nolib_flags[@]}"; then
+			local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
+			ewarn "${CC} seems to lack runtime, trying with ${nolib_flags[*]}"
+		elif test_compiler "${nolib_flags[@]}" -nostartfiles; then
+			# Avoiding -nostartfiles earlier on for bug #862540,
+			# and set available entry symbol for bug #862798.
+			nolib_flags+=( -nostartfiles -emain )
+
+			local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
+			ewarn "${CC} seems to lack runtime, trying with ${nolib_flags[*]}"
+		fi
+	fi
+
+	local mycmakeargs=(
+		-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${LLVM_MAJOR}"
+
+		-DCOMPILER_RT_INCLUDE_TESTS=$(usex test)
+		-DCOMPILER_RT_BUILD_LIBFUZZER=OFF
+		-DCOMPILER_RT_BUILD_MEMPROF=OFF
+		-DCOMPILER_RT_BUILD_ORC=OFF
+		-DCOMPILER_RT_BUILD_PROFILE=OFF
+		-DCOMPILER_RT_BUILD_SANITIZERS=OFF
+		-DCOMPILER_RT_BUILD_XRAY=OFF
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+
+	if use amd64 && ! target_is_not_host; then
+		mycmakeargs+=(
+			-DCAN_TARGET_i386=$(usex abi_x86_32)
+			-DCAN_TARGET_x86_64=$(usex abi_x86_64)
+		)
+	fi
+
+	if is_crosspkg; then
+		# Needed to target built libc headers
+		export CFLAGS="${CFLAGS} -isystem /usr/${CTARGET}/usr/include"
+		mycmakeargs+=(
+			# Without this, the compiler will compile a test program
+			# and fail due to no builtins.
+			-DCMAKE_C_COMPILER_WORKS=1
+			-DCMAKE_CXX_COMPILER_WORKS=1
+
+			# Without this, compiler-rt install location is not unique
+			# to target triples, only to architecture.
+			# Needed if you want to target multiple libcs for one arch.
+			-DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON
+
+			-DCMAKE_ASM_COMPILER_TARGET="${CTARGET}"
+			-DCMAKE_C_COMPILER_TARGET="${CTARGET}"
+			-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON
+		)
+	fi
+
+	if use prefix && [[ "${CHOST}" == *-darwin* ]] ; then
+		mycmakeargs+=(
+			# setting -isysroot is disabled with compiler-rt-prefix-paths.patch
+			# this allows adding arm64 support using SDK in EPREFIX
+			-DDARWIN_macosx_CACHED_SYSROOT="${EPREFIX}/MacOSX.sdk"
+			# Set version based on the SDK in EPREFIX.
+			# This disables i386 for SDK >= 10.15
+			-DDARWIN_macosx_OVERRIDE_SDK_VERSION="$(realpath ${EPREFIX}/MacOSX.sdk | sed -e 's/.*MacOSX\(.*\)\.sdk/\1/')"
+			# Use our libtool instead of looking it up with xcrun
+			-DCMAKE_LIBTOOL="${EPREFIX}/usr/bin/${CHOST}-libtool"
+		)
+	fi
+
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags)"
+
+			-DCOMPILER_RT_TEST_COMPILER="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin/clang"
+			-DCOMPILER_RT_TEST_CXX_COMPILER="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin/clang++"
+		)
+	fi
+
+	cmake_src_configure
+}
+
+src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+
+	cmake_build check-builtins
+}
diff --git a/sys-libs/libcxx/Manifest b/sys-libs/libcxx/Manifest
index 9b13afc5c767..7dcb9301d03b 100644
--- a/sys-libs/libcxx/Manifest
+++ b/sys-libs/libcxx/Manifest
@@ -11,6 +11,7 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-5237193b87721134541f228e28edfd544a9c8ac8.tar.gz 201404340 BLAKE2B f028b8b100721202007e3106d8ee91bcf2ac90588f9268ec835dc4ea3941363d4b796338146c65d1a9e88957d18738030f713b3fed770616c79cb40043e706db SHA512 40a4d4f99f1a690a0f8737261aeeaa61af6124eeadcb6bab5c3828e88b36b8cce42a8caee6d3f01e675047c59b62210de017d207e341f680eff97758f798ad45
 DIST llvm-project-6a4489a73337907d52e7eaf3716f3de9008e6e53.tar.gz 201703120 BLAKE2B 7de783df15ff30ab85aad2f02a5a043d09b18dd7b212c19e21b045870497e2b17a53527523cd533c4ef61b22d605026a9322d2f8d02f0d4f76ed26ab693b788c SHA512 ffc31d7037255d608717faff84e858d63b37abed5659d66599864ae44ed00fc5902e9851eb1b8c848b500623681ef5782b39ad2bf8bcf96ac4f35032efde1490
+DIST llvm-project-d37ced88809cb4d2df57ec80887b3f8801ca719b.tar.gz 203826420 BLAKE2B 58448df837f2119720a36b837d0e4f2b2fc00da5658706b193b9d2d180cf0f6c5eb79a9cc0fa9d94310996a95210115a5a46371bd8537f16e105adea14a72399 SHA512 1348e5bf736acaeebf0ae0f613973e6c2d439d360c2272bb4ab112e579b12c297970bb765fd774c768aa55a922c93048b1d8ae6bfd636b241fa86f9427cc2069
 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
@@ -19,4 +20,5 @@ EBUILD libcxx-17.0.6.ebuild 5296 BLAKE2B f6f2b7f309b6ca1441cf39df6409dcbd0eb4b21
 EBUILD libcxx-18.0.0.9999.ebuild 5525 BLAKE2B 058cd96a7bff79044013c7834345f6b2ebe160a7d30283b5157eb5aa90bce702dc5bdcd0c5be825e400c9e57dd5006008dca6b75aeb3f15af5b65ecf5a61fc1d SHA512 de3f1c171421ae9edb673b984a031c5f7ff33641ce0a8a8150eda20815e54fa1d1ba02c1ba4fa5cd9a9bc406314c5b691408129069c2fa5571e8d7bc15a3a874
 EBUILD libcxx-18.0.0_pre20231119.ebuild 5229 BLAKE2B 414044942632b1b9f0d0953c2e7a2f337a55a91b5510453040fcd769178fcfa073d64a2ce19eb0f75fd8a3b80fe1bd6cdb8054663781095768e017a675de93f7 SHA512 edd51b15343497111fd96b0e3b838982e0351debf15966b014b66a58d7b76c79fd76ca621f5c1ef8beccc5e697f2b7cd7e74a5a6da5b65d23c2cd54d9dce879b
 EBUILD libcxx-18.0.0_pre20231129.ebuild 5525 BLAKE2B 058cd96a7bff79044013c7834345f6b2ebe160a7d30283b5157eb5aa90bce702dc5bdcd0c5be825e400c9e57dd5006008dca6b75aeb3f15af5b65ecf5a61fc1d SHA512 de3f1c171421ae9edb673b984a031c5f7ff33641ce0a8a8150eda20815e54fa1d1ba02c1ba4fa5cd9a9bc406314c5b691408129069c2fa5571e8d7bc15a3a874
+EBUILD libcxx-18.0.0_pre20231215.ebuild 5525 BLAKE2B 058cd96a7bff79044013c7834345f6b2ebe160a7d30283b5157eb5aa90bce702dc5bdcd0c5be825e400c9e57dd5006008dca6b75aeb3f15af5b65ecf5a61fc1d SHA512 de3f1c171421ae9edb673b984a031c5f7ff33641ce0a8a8150eda20815e54fa1d1ba02c1ba4fa5cd9a9bc406314c5b691408129069c2fa5571e8d7bc15a3a874
 MISC metadata.xml 718 BLAKE2B 3cc1e43a6f1ada368cfc0bf8aaf49007f6792062b684ab9299b5180d778b158325b6931169b52dd14e85ae9ad6dc1a03be323b814fb920fe8434ad86425d699c SHA512 c2cef3e481c0c3db7de6de8c0a5aff42a1e7fe81155d99f1f0f0988f6d5ca041f787a27a2dde0073037d59e082e2f6da7eefe1303f1c1837ebc12e8e0d28729f
diff --git a/sys-libs/libcxx/libcxx-18.0.0_pre20231215.ebuild b/sys-libs/libcxx/libcxx-18.0.0_pre20231215.ebuild
new file mode 100644
index 000000000000..c90b80b9008d
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-18.0.0_pre20231215.ebuild
@@ -0,0 +1,212 @@
+# 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"
+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
+}
+
+src_prepare() {
+	# hanging tests
+	# https://github.com/llvm/llvm-project/issues/73791
+	rm ../libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/fetch_* || die
+	rm ../libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/operator.*_equals* || die
+
+	cmake_src_prepare
+}
+
+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/libcxxabi/Manifest b/sys-libs/libcxxabi/Manifest
index 2bf2de16c0c0..4968bcbc17c6 100644
--- a/sys-libs/libcxxabi/Manifest
+++ b/sys-libs/libcxxabi/Manifest
@@ -8,6 +8,7 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-5237193b87721134541f228e28edfd544a9c8ac8.tar.gz 201404340 BLAKE2B f028b8b100721202007e3106d8ee91bcf2ac90588f9268ec835dc4ea3941363d4b796338146c65d1a9e88957d18738030f713b3fed770616c79cb40043e706db SHA512 40a4d4f99f1a690a0f8737261aeeaa61af6124eeadcb6bab5c3828e88b36b8cce42a8caee6d3f01e675047c59b62210de017d207e341f680eff97758f798ad45
 DIST llvm-project-6a4489a73337907d52e7eaf3716f3de9008e6e53.tar.gz 201703120 BLAKE2B 7de783df15ff30ab85aad2f02a5a043d09b18dd7b212c19e21b045870497e2b17a53527523cd533c4ef61b22d605026a9322d2f8d02f0d4f76ed26ab693b788c SHA512 ffc31d7037255d608717faff84e858d63b37abed5659d66599864ae44ed00fc5902e9851eb1b8c848b500623681ef5782b39ad2bf8bcf96ac4f35032efde1490
+DIST llvm-project-d37ced88809cb4d2df57ec80887b3f8801ca719b.tar.gz 203826420 BLAKE2B 58448df837f2119720a36b837d0e4f2b2fc00da5658706b193b9d2d180cf0f6c5eb79a9cc0fa9d94310996a95210115a5a46371bd8537f16e105adea14a72399 SHA512 1348e5bf736acaeebf0ae0f613973e6c2d439d360c2272bb4ab112e579b12c297970bb765fd774c768aa55a922c93048b1d8ae6bfd636b241fa86f9427cc2069
 EBUILD libcxxabi-14.0.6.ebuild 3386 BLAKE2B 25c436f437060cdc323ff18e34d8694f558f100f81b990077ed584b7cacabb54fcaa74e67c07179d84dbd8e184f51d157b2bc8d2f48efc607985234b716840f2 SHA512 481c84912363d33b8582b61ed655be3dad86038de100c9ecf072f8bb11d850e25aa587fd43bd19dd84c280a968d2950360115f414f61748d726224aade36da6e
 EBUILD libcxxabi-15.0.7.ebuild 2911 BLAKE2B 5f2004d2f68fe4eddb0b22be82d28fcca7954d0e3ad9a5510744adc4d0dfd7a1ab9fd928404adcd3eeecc58703f51117d0a80e5895b53e0ae7b71621ad5a435c SHA512 5b8e2c6abdec785649aa41b7f05ab86ecab30ff0631d6078c9b1052b406c320c5847b8f16ffa6d9e62ba4a6bca5959b18770810924d6e6da264fb08d6ff738d0
 EBUILD libcxxabi-16.0.6.ebuild 2919 BLAKE2B e281e229f747de5d8f976852b5e4f27126d220f65c9f6a380968a5f0f1957405cd36a2f01211af46c3962a09a8258a03e0a06af63733b0f46663048207034f03 SHA512 debe5dd103de3b600fbd8e58e464e4d11e48e762711ae64406c64d05e6258e5c025ff1bac9f3d10f4cef49abd0058e86696a658f8f82f4000ef749108eb760f2
@@ -15,4 +16,5 @@ EBUILD libcxxabi-17.0.6.ebuild 2924 BLAKE2B b01fff2ad49c475e67e2b83059e1e13001b9
 EBUILD libcxxabi-18.0.0.9999.ebuild 2857 BLAKE2B 5514676dd71b90112833a05b424c5d79d70d18cfc1e173eb0dbd80bd32f02ec31ce689bb30fc3aa7e6da22c8ff3b2011769539943f6087a0547fedb48100b9da SHA512 87692a0e19cc9937171167c0d0ecbe46424b0bcbff19f0cb9496387170d9b4eb2c9f1ae767792a61b146e0c8af5a437d7b9ede288d52a1ec3824517f2181a45d
 EBUILD libcxxabi-18.0.0_pre20231119.ebuild 2857 BLAKE2B 5514676dd71b90112833a05b424c5d79d70d18cfc1e173eb0dbd80bd32f02ec31ce689bb30fc3aa7e6da22c8ff3b2011769539943f6087a0547fedb48100b9da SHA512 87692a0e19cc9937171167c0d0ecbe46424b0bcbff19f0cb9496387170d9b4eb2c9f1ae767792a61b146e0c8af5a437d7b9ede288d52a1ec3824517f2181a45d
 EBUILD libcxxabi-18.0.0_pre20231129.ebuild 2857 BLAKE2B 5514676dd71b90112833a05b424c5d79d70d18cfc1e173eb0dbd80bd32f02ec31ce689bb30fc3aa7e6da22c8ff3b2011769539943f6087a0547fedb48100b9da SHA512 87692a0e19cc9937171167c0d0ecbe46424b0bcbff19f0cb9496387170d9b4eb2c9f1ae767792a61b146e0c8af5a437d7b9ede288d52a1ec3824517f2181a45d
+EBUILD libcxxabi-18.0.0_pre20231215.ebuild 2857 BLAKE2B 5514676dd71b90112833a05b424c5d79d70d18cfc1e173eb0dbd80bd32f02ec31ce689bb30fc3aa7e6da22c8ff3b2011769539943f6087a0547fedb48100b9da SHA512 87692a0e19cc9937171167c0d0ecbe46424b0bcbff19f0cb9496387170d9b4eb2c9f1ae767792a61b146e0c8af5a437d7b9ede288d52a1ec3824517f2181a45d
 MISC metadata.xml 557 BLAKE2B 4f6b0acb7cfdf74971a6fd96051d9f9020141c6117333a8de42bd043935b7bff8d9942faabdf3b1c94597c460393f64eb7d3f7b7d49f39ecfd0094de460f563e SHA512 67a812ef768e681ae77ef6e13bccffcbe53b41e94901f0558b3c7acaf896605ca670c4bb5a690bd9afa3b5a76271341710520a6abc0024c18f437fabde20e847
diff --git a/sys-libs/libcxxabi/libcxxabi-18.0.0_pre20231215.ebuild b/sys-libs/libcxxabi/libcxxabi-18.0.0_pre20231215.ebuild
new file mode 100644
index 000000000000..7b2c36768873
--- /dev/null
+++ b/sys-libs/libcxxabi/libcxxabi-18.0.0_pre20231215.ebuild
@@ -0,0 +1,115 @@
+# 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="Low level support for a standard C++ library"
+HOMEPAGE="https://libcxxabi.llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="0"
+IUSE="+clang +static-libs test"
+REQUIRED_USE="test? ( clang )"
+RESTRICT="!test? ( test )"
+
+# in 15.x, cxxabi.h is moving from libcxx to libcxxabi
+RDEPEND+="
+	!<sys-libs/libcxx-15
+"
+DEPEND="
+	${RDEPEND}
+	sys-devel/llvm:${LLVM_MAJOR}
+"
+BDEPEND="
+	clang? (
+		sys-devel/clang:${LLVM_MAJOR}
+	)
+	!test? (
+		${PYTHON_DEPS}
+	)
+	test? (
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+	)
+"
+
+LLVM_COMPONENTS=( runtimes libcxx{abi,} llvm/cmake cmake )
+LLVM_TEST_COMPONENTS=( llvm/utils/llvm-lit )
+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
+}
+
+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
+	[[ $(tc-get-c-rtlib) == compiler-rt ]] && use_compiler_rt=ON
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DCMAKE_CXX_COMPILER_TARGET="${CHOST}"
+		-DPython3_EXECUTABLE="${PYTHON}"
+		-DLLVM_ENABLE_RUNTIMES="libcxxabi;libcxx"
+		-DLLVM_INCLUDE_TESTS=OFF
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBCXXABI_ENABLE_SHARED=ON
+		-DLIBCXXABI_ENABLE_STATIC=$(usex static-libs)
+		-DLIBCXXABI_INCLUDE_TESTS=$(usex test)
+		-DLIBCXXABI_USE_COMPILER_RT=${use_compiler_rt}
+
+		# upstream is omitting standard search path for this
+		# probably because gcc & clang are bundling their own unwind.h
+		-DLIBCXXABI_LIBUNWIND_INCLUDES="${EPREFIX}"/usr/include
+
+		-DLIBCXX_LIBDIR_SUFFIX=
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=OFF
+		-DLIBCXX_CXX_ABI=libcxxabi
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=OFF
+		-DLIBCXX_INCLUDE_BENCHMARKS=OFF
+		-DLIBCXX_INCLUDE_TESTS=OFF
+	)
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags)"
+			-DPython3_EXECUTABLE="${PYTHON}"
+		)
+	fi
+	cmake_src_configure
+}
+
+multilib_src_compile() {
+	cmake_build cxxabi
+}
+
+multilib_src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-cxxabi
+}
+
+multilib_src_install() {
+	DESTDIR="${D}" cmake_build install-cxxabi
+}
diff --git a/sys-libs/libomp/Manifest b/sys-libs/libomp/Manifest
index 639351518ebe..bed372671ee2 100644
--- a/sys-libs/libomp/Manifest
+++ b/sys-libs/libomp/Manifest
@@ -11,6 +11,7 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-5237193b87721134541f228e28edfd544a9c8ac8.tar.gz 201404340 BLAKE2B f028b8b100721202007e3106d8ee91bcf2ac90588f9268ec835dc4ea3941363d4b796338146c65d1a9e88957d18738030f713b3fed770616c79cb40043e706db SHA512 40a4d4f99f1a690a0f8737261aeeaa61af6124eeadcb6bab5c3828e88b36b8cce42a8caee6d3f01e675047c59b62210de017d207e341f680eff97758f798ad45
 DIST llvm-project-6a4489a73337907d52e7eaf3716f3de9008e6e53.tar.gz 201703120 BLAKE2B 7de783df15ff30ab85aad2f02a5a043d09b18dd7b212c19e21b045870497e2b17a53527523cd533c4ef61b22d605026a9322d2f8d02f0d4f76ed26ab693b788c SHA512 ffc31d7037255d608717faff84e858d63b37abed5659d66599864ae44ed00fc5902e9851eb1b8c848b500623681ef5782b39ad2bf8bcf96ac4f35032efde1490
+DIST llvm-project-d37ced88809cb4d2df57ec80887b3f8801ca719b.tar.gz 203826420 BLAKE2B 58448df837f2119720a36b837d0e4f2b2fc00da5658706b193b9d2d180cf0f6c5eb79a9cc0fa9d94310996a95210115a5a46371bd8537f16e105adea14a72399 SHA512 1348e5bf736acaeebf0ae0f613973e6c2d439d360c2272bb4ab112e579b12c297970bb765fd774c768aa55a922c93048b1d8ae6bfd636b241fa86f9427cc2069
 EBUILD libomp-14.0.6-r1.ebuild 3917 BLAKE2B d92540af690dd622122ad1a4ed2548afa141f1254fbe9a9b3d34286b36f0fa70ccaf915f218c1bea8c68377ea20724db9443d365e2e5f290707f444d3ff47ca5 SHA512 433ae63716103af5aa493c7dbae43f10003cac95abaae579dcb61cba6390da4b9b3fc921e410ba899719bd170fa153a7b3d66c8776c37fd074066173c1fea160
 EBUILD libomp-15.0.7-r2.ebuild 3474 BLAKE2B c75fddce61b7e8fe837b4c5bc1b7dacfbe4bc1572537dd7c44c23f894d05b104e8946d896b3b19d78de32a87d866d5911a0f3a8f81796469bba2753d051b2105 SHA512 7dc7c5fd7cd370acadfdf6e15ed09cde0798312ed3c72e770596aecb5817a4ec1477cc1092e3c159d1988bba4200808259705206f80d8fd0019fe07c34f4455d
 EBUILD libomp-15.0.7-r6.ebuild 3480 BLAKE2B 89d638d156dba3a56ad23baef8b14084f1d890ad31980427700a0b04f7199894d24a60df5c40d40815f469ca1e8ac726e0914538bad52ea94702e179cb5bd85d SHA512 005b5f4be5b2433c9c16c483235500ebb22a56e6df70cc53e62ac73aed14cd8c65e2dbcf1457f3cad1d0cb6ca68a7d98e8543803fccf32cd5457f92c0db27df8
@@ -19,4 +20,5 @@ EBUILD libomp-17.0.6.ebuild 3994 BLAKE2B 9dcb5843a7ef3f28c4b174b264b53b7b4e0638d
 EBUILD libomp-18.0.0.9999.ebuild 3910 BLAKE2B 9104678d4e75d56a9dcd6f7b1f032130534e49d78d5a99194fe93a064ae1bb734b865fec73da45598c9d91b479b16cc327c577bfb98c17cd061d83b228b3baac SHA512 30343370384efe4791fb91df02f465a64c67a98ad480f5a8e8d3a4d16d7b8a4c5fc564936b8c6b4facbe1443bd34542c76d344a7f7b745ca9b85622917d1c486
 EBUILD libomp-18.0.0_pre20231119.ebuild 3910 BLAKE2B 9104678d4e75d56a9dcd6f7b1f032130534e49d78d5a99194fe93a064ae1bb734b865fec73da45598c9d91b479b16cc327c577bfb98c17cd061d83b228b3baac SHA512 30343370384efe4791fb91df02f465a64c67a98ad480f5a8e8d3a4d16d7b8a4c5fc564936b8c6b4facbe1443bd34542c76d344a7f7b745ca9b85622917d1c486
 EBUILD libomp-18.0.0_pre20231129.ebuild 3910 BLAKE2B 9104678d4e75d56a9dcd6f7b1f032130534e49d78d5a99194fe93a064ae1bb734b865fec73da45598c9d91b479b16cc327c577bfb98c17cd061d83b228b3baac SHA512 30343370384efe4791fb91df02f465a64c67a98ad480f5a8e8d3a4d16d7b8a4c5fc564936b8c6b4facbe1443bd34542c76d344a7f7b745ca9b85622917d1c486
+EBUILD libomp-18.0.0_pre20231215.ebuild 3910 BLAKE2B 9104678d4e75d56a9dcd6f7b1f032130534e49d78d5a99194fe93a064ae1bb734b865fec73da45598c9d91b479b16cc327c577bfb98c17cd061d83b228b3baac SHA512 30343370384efe4791fb91df02f465a64c67a98ad480f5a8e8d3a4d16d7b8a4c5fc564936b8c6b4facbe1443bd34542c76d344a7f7b745ca9b85622917d1c486
 MISC metadata.xml 963 BLAKE2B fdea4545db21492049061b85eaa7038965183e10aceae7c41daadc1ce10e7e1bcb2e86344659787ee244360b50b51c99e1a348d3acd2185dac80097541a00dd7 SHA512 c279f8e9c2463dc3f6e02856e520105d6f3321b633439bfe7409bfd6e7e43f1450053dc4f6663492caf7077caf3f4ab0f5cf0161631639e3aefa9ff985dc476f
diff --git a/sys-libs/libomp/libomp-18.0.0_pre20231215.ebuild b/sys-libs/libomp/libomp-18.0.0_pre20231215.ebuild
new file mode 100644
index 000000000000..960f9ce8087f
--- /dev/null
+++ b/sys-libs/libomp/libomp-18.0.0_pre20231215.ebuild
@@ -0,0 +1,150 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..12} )
+inherit flag-o-matic cmake-multilib linux-info llvm llvm.org
+inherit python-single-r1 toolchain-funcs
+
+DESCRIPTION="OpenMP runtime library for LLVM/clang compiler"
+HOMEPAGE="https://openmp.llvm.org"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="0/${LLVM_SOABI}"
+IUSE="
+	+debug gdb-plugin hwloc offload ompt test
+	llvm_targets_AMDGPU llvm_targets_NVPTX
+"
+REQUIRED_USE="
+	gdb-plugin? ( ${PYTHON_REQUIRED_USE} )
+"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	gdb-plugin? ( ${PYTHON_DEPS} )
+	hwloc? ( >=sys-apps/hwloc-2.5:0=[${MULTILIB_USEDEP}] )
+	offload? (
+		dev-libs/libffi:=[${MULTILIB_USEDEP}]
+		~sys-devel/llvm-${PV}[${MULTILIB_USEDEP}]
+		llvm_targets_AMDGPU? ( dev-libs/rocr-runtime:= )
+	)
+"
+# tests:
+# - dev-python/lit provides the test runner
+# - sys-devel/llvm provide test utils (e.g. FileCheck)
+# - sys-devel/clang provides the compiler to run tests
+DEPEND="
+	${RDEPEND}
+"
+BDEPEND="
+	dev-lang/perl
+	offload? (
+		llvm_targets_AMDGPU? ( sys-devel/clang )
+		llvm_targets_NVPTX? ( sys-devel/clang )
+		virtual/pkgconfig
+	)
+	test? (
+		${PYTHON_DEPS}
+		$(python_gen_cond_dep '
+			dev-python/lit[${PYTHON_USEDEP}]
+		')
+		sys-devel/clang
+	)
+"
+
+LLVM_COMPONENTS=( openmp cmake llvm/include )
+llvm.org_set_globals
+
+kernel_pds_check() {
+	if use kernel_linux && kernel_is -lt 4 15 && kernel_is -ge 4 13; then
+		local CONFIG_CHECK="~!SCHED_PDS"
+		local ERROR_SCHED_PDS="\
+PDS scheduler versions >= 0.98c < 0.98i (e.g. used in kernels >= 4.13-pf11
+< 4.14-pf9) do not implement sched_yield() call which may result in horrible
+performance problems with libomp. If you are using one of the specified
+kernel versions, you may want to disable the PDS scheduler."
+
+		check_extra_config
+	fi
+}
+
+pkg_pretend() {
+	kernel_pds_check
+}
+
+pkg_setup() {
+	use offload && LLVM_MAX_SLOT=${LLVM_MAJOR} llvm_pkg_setup
+	if use gdb-plugin || use test; then
+		python-single-r1_pkg_setup
+	fi
+}
+
+multilib_src_configure() {
+	# LTO causes issues in other packages building, #870127
+	filter-lto
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+
+	local build_omptarget=OFF
+	# upstream disallows building libomptarget when sizeof(void*) != 8
+	if use offload &&
+		"$(tc-getCC)" ${CFLAGS} ${CPPFLAGS} -c -x c - -o /dev/null \
+		<<-EOF &>/dev/null
+			int test[sizeof(void *) == 8 ? 1 : -1];
+		EOF
+	then
+		build_omptarget=ON
+	fi
+
+	local libdir="$(get_libdir)"
+	local mycmakeargs=(
+		-DOPENMP_LIBDIR_SUFFIX="${libdir#lib}"
+
+		-DLIBOMP_USE_HWLOC=$(usex hwloc)
+		-DLIBOMP_OMPD_GDB_SUPPORT=$(multilib_native_usex gdb-plugin)
+		-DLIBOMP_OMPT_SUPPORT=$(usex ompt)
+
+		-DOPENMP_ENABLE_LIBOMPTARGET=${build_omptarget}
+
+		# do not install libgomp.so & libiomp5.so aliases
+		-DLIBOMP_INSTALL_ALIASES=OFF
+		# disable unnecessary hack copying stuff back to srcdir
+		-DLIBOMP_COPY_EXPORTS=OFF
+		# prevent trying to access the GPU
+		-DLIBOMPTARGET_AMDGPU_ARCH=LIBOMPTARGET_AMDGPU_ARCH-NOTFOUND
+	)
+
+	if [[ ${build_omptarget} == ON ]]; then
+		if has "${CHOST%%-*}" aarch64 powerpc64le x86_64; then
+			mycmakeargs+=(
+				-DLIBOMPTARGET_BUILD_AMDGPU_PLUGIN=$(usex llvm_targets_AMDGPU)
+				-DLIBOMPTARGET_BUILD_CUDA_PLUGIN=$(usex llvm_targets_NVPTX)
+			)
+		else
+			mycmakeargs+=(
+				-DLIBOMPTARGET_BUILD_AMDGPU_PLUGIN=OFF
+				-DLIBOMPTARGET_BUILD_CUDA_PLUGIN=OFF
+			)
+		fi
+	fi
+
+	use test && mycmakeargs+=(
+		# this project does not use standard LLVM cmake macros
+		-DOPENMP_LLVM_LIT_EXECUTABLE="${EPREFIX}/usr/bin/lit"
+		-DOPENMP_LIT_ARGS="$(get_lit_flags)"
+
+		-DOPENMP_TEST_C_COMPILER="$(type -P "${CHOST}-clang")"
+		-DOPENMP_TEST_CXX_COMPILER="$(type -P "${CHOST}-clang++")"
+	)
+	addpredict /dev/nvidiactl
+	cmake_src_configure
+}
+
+multilib_src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+
+	cmake_build check-libomp
+}
diff --git a/sys-libs/llvm-libunwind/Manifest b/sys-libs/llvm-libunwind/Manifest
index b535d54d688f..afa53abb684b 100644
--- a/sys-libs/llvm-libunwind/Manifest
+++ b/sys-libs/llvm-libunwind/Manifest
@@ -8,6 +8,7 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-5237193b87721134541f228e28edfd544a9c8ac8.tar.gz 201404340 BLAKE2B f028b8b100721202007e3106d8ee91bcf2ac90588f9268ec835dc4ea3941363d4b796338146c65d1a9e88957d18738030f713b3fed770616c79cb40043e706db SHA512 40a4d4f99f1a690a0f8737261aeeaa61af6124eeadcb6bab5c3828e88b36b8cce42a8caee6d3f01e675047c59b62210de017d207e341f680eff97758f798ad45
 DIST llvm-project-6a4489a73337907d52e7eaf3716f3de9008e6e53.tar.gz 201703120 BLAKE2B 7de783df15ff30ab85aad2f02a5a043d09b18dd7b212c19e21b045870497e2b17a53527523cd533c4ef61b22d605026a9322d2f8d02f0d4f76ed26ab693b788c SHA512 ffc31d7037255d608717faff84e858d63b37abed5659d66599864ae44ed00fc5902e9851eb1b8c848b500623681ef5782b39ad2bf8bcf96ac4f35032efde1490
+DIST llvm-project-d37ced88809cb4d2df57ec80887b3f8801ca719b.tar.gz 203826420 BLAKE2B 58448df837f2119720a36b837d0e4f2b2fc00da5658706b193b9d2d180cf0f6c5eb79a9cc0fa9d94310996a95210115a5a46371bd8537f16e105adea14a72399 SHA512 1348e5bf736acaeebf0ae0f613973e6c2d439d360c2272bb4ab112e579b12c297970bb765fd774c768aa55a922c93048b1d8ae6bfd636b241fa86f9427cc2069
 EBUILD llvm-libunwind-14.0.6-r1.ebuild 3161 BLAKE2B ba7b19ed2bc77b52eee0b04d938541d2eb4053b65a641e55e54ebac85adcd432fa60b2b484003890bc96be83d61410bb58c2f3a86f12a7c574044a8e10427db9 SHA512 11854f9ef2a552a96e51c618958e553d4cd4affc78312845a223d0fe6d2ff62e8f8b2b3c29ad4a093b08a6df63b230f21b9ef6b63440058322f6a00f160df3e4
 EBUILD llvm-libunwind-15.0.7.ebuild 3032 BLAKE2B 9b47e894db1a764f3eca3135f4caba68261953f4433af017b7bb53181e345ad26c570733f997022c53c9ef49a0a3b823188d92cfcc16a2113825d767b1ffab2a SHA512 0b68480fb2a8e5a351574e81fbcff824cd324754ed40378f06fec12fedbba94a921043d72db6ecc37f8b0680b7f518bbbd8d63f69ce8d84f86ca522653d293fb
 EBUILD llvm-libunwind-16.0.6-r1.ebuild 3427 BLAKE2B 64039b2f0476a6b93aba54cca4ef3ad7310a240a4e8b10c6d625eb40a45b8c60cf37eca4391344872ceeed22db0c33d6af5d60b5c3246ff9d395ccc8def87d53 SHA512 77f71992f3749b4e85f8426e073aae6d829aaa5705a7ff5545063823dc7eb12fb70c5ec1c2b691422bcb3a4396c44ef2ba535ada2cf47e15ae825cc894b3726d
@@ -15,4 +16,5 @@ EBUILD llvm-libunwind-17.0.6.ebuild 3433 BLAKE2B 9c688e473a6d03d02c199632e387d7f
 EBUILD llvm-libunwind-18.0.0.9999.ebuild 3355 BLAKE2B ed26a365a02c8fd7c5432b0386240e447dfb719cbb688d3d88cb47f8054c927aca29004a8719bc279cf7ea6b033d8ccb73ccfe6f4c508486f85c622360a5d247 SHA512 33ae579cfc54e35fdf777b760800f5b048395887973a157ee17ddc37fd60a844f09c5dbc550fca3a90bc887eceb72535fbab9a950cab252fe117b034f9b143a3
 EBUILD llvm-libunwind-18.0.0_pre20231119.ebuild 3355 BLAKE2B ed26a365a02c8fd7c5432b0386240e447dfb719cbb688d3d88cb47f8054c927aca29004a8719bc279cf7ea6b033d8ccb73ccfe6f4c508486f85c622360a5d247 SHA512 33ae579cfc54e35fdf777b760800f5b048395887973a157ee17ddc37fd60a844f09c5dbc550fca3a90bc887eceb72535fbab9a950cab252fe117b034f9b143a3
 EBUILD llvm-libunwind-18.0.0_pre20231129.ebuild 3355 BLAKE2B ed26a365a02c8fd7c5432b0386240e447dfb719cbb688d3d88cb47f8054c927aca29004a8719bc279cf7ea6b033d8ccb73ccfe6f4c508486f85c622360a5d247 SHA512 33ae579cfc54e35fdf777b760800f5b048395887973a157ee17ddc37fd60a844f09c5dbc550fca3a90bc887eceb72535fbab9a950cab252fe117b034f9b143a3
+EBUILD llvm-libunwind-18.0.0_pre20231215.ebuild 3355 BLAKE2B ed26a365a02c8fd7c5432b0386240e447dfb719cbb688d3d88cb47f8054c927aca29004a8719bc279cf7ea6b033d8ccb73ccfe6f4c508486f85c622360a5d247 SHA512 33ae579cfc54e35fdf777b760800f5b048395887973a157ee17ddc37fd60a844f09c5dbc550fca3a90bc887eceb72535fbab9a950cab252fe117b034f9b143a3
 MISC metadata.xml 438 BLAKE2B 2a36fbbc59e137056029c62aef6d167d9c82531c2582d7bad5cb13cc36e5c4c9518ffe8c56d06bbcfd97ad22eda71a8b776f3984195f53d06cf45659b438dc00 SHA512 4f18b054072d00e5440faa31a59f9ef587d035b5f25e30913f0b1449debee967fa794fae2548e87db3fb2177ce853ab075e1f11f3cc763f5d7fdf06147108845
diff --git a/sys-libs/llvm-libunwind/llvm-libunwind-18.0.0_pre20231215.ebuild b/sys-libs/llvm-libunwind/llvm-libunwind-18.0.0_pre20231215.ebuild
new file mode 100644
index 000000000000..8f54197f0751
--- /dev/null
+++ b/sys-libs/llvm-libunwind/llvm-libunwind-18.0.0_pre20231215.ebuild
@@ -0,0 +1,131 @@
+# 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="C++ runtime stack unwinder from LLVM"
+HOMEPAGE="https://llvm.org/docs/ExceptionHandling.html"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="0"
+IUSE="+clang +debug static-libs test"
+REQUIRED_USE="test? ( clang )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	!sys-libs/libunwind
+"
+DEPEND="
+	sys-devel/llvm:${LLVM_MAJOR}
+"
+BDEPEND="
+	clang? (
+		sys-devel/clang:${LLVM_MAJOR}
+	)
+	!test? (
+		${PYTHON_DEPS}
+	)
+	test? (
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+	)
+"
+
+LLVM_COMPONENTS=( runtimes libunwind libcxx llvm/cmake cmake )
+LLVM_TEST_COMPONENTS=( libcxxabi llvm/utils/llvm-lit )
+llvm.org_set_globals
+
+python_check_deps() {
+	use test || return 0
+	python_has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	LLVM_MAX_SLOT=${LLVM_MAJOR} llvm_pkg_setup
+	python-any-r1_pkg_setup
+}
+
+multilib_src_configure() {
+	local libdir=$(get_libdir)
+
+	# https://github.com/llvm/llvm-project/issues/56825
+	# also separately bug #863917
+	filter-lto
+
+	if use clang; then
+		local -x CC=${CHOST}-clang
+		local -x CXX=${CHOST}-clang++
+		strip-unsupported-flags
+	fi
+
+	# link to compiler-rt
+	# https://github.com/gentoo/gentoo/pull/21516
+	local use_compiler_rt=OFF
+	[[ $(tc-get-c-rtlib) == compiler-rt ]] && use_compiler_rt=ON
+
+	# Respect upstream build type assumptions (bug #910436) where they do:
+	# -DLIBUNWIND_ENABLE_ASSERTIONS=ON =>
+	#       -DCMAKE_BUILD_TYPE=DEBUG  => -UNDEBUG
+	#       -DCMAKE_BUILD_TYPE!=debug => -DNDEBUG
+	# -DLIBUNWIND_ENABLE_ASSERTIONS=OFF =>
+	#       -UNDEBUG
+	# See also https://github.com/llvm/llvm-project/issues/86#issuecomment-1649668826.
+	use debug || append-cppflags -DNDEBUG
+
+	local mycmakeargs=(
+		-DCMAKE_CXX_COMPILER_TARGET="${CHOST}"
+		-DPython3_EXECUTABLE="${PYTHON}"
+		-DLLVM_ENABLE_RUNTIMES="libunwind"
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+		-DLLVM_INCLUDE_TESTS=OFF
+		-DLIBUNWIND_ENABLE_ASSERTIONS=$(usex debug)
+		-DLIBUNWIND_ENABLE_STATIC=$(usex static-libs)
+		-DLIBUNWIND_INCLUDE_TESTS=$(usex test)
+		-DLIBUNWIND_INSTALL_HEADERS=ON
+
+		# support non-native unwinding; given it's small enough,
+		# enable it unconditionally
+		-DLIBUNWIND_ENABLE_CROSS_UNWINDING=ON
+
+		# avoid dependency on libgcc_s if compiler-rt is used
+		-DLIBUNWIND_USE_COMPILER_RT=${use_compiler_rt}
+	)
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_ENABLE_RUNTIMES="libunwind;libcxxabi;libcxx"
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags)"
+			-DLIBUNWIND_LIBCXX_PATH="${WORKDIR}/libcxx"
+
+			-DLIBCXXABI_LIBDIR_SUFFIX=
+			-DLIBCXXABI_ENABLE_SHARED=OFF
+			-DLIBCXXABI_ENABLE_STATIC=ON
+			-DLIBCXXABI_USE_LLVM_UNWINDER=ON
+			-DLIBCXXABI_INCLUDE_TESTS=OFF
+
+			-DLIBCXX_LIBDIR_SUFFIX=
+			-DLIBCXX_ENABLE_SHARED=OFF
+			-DLIBCXX_ENABLE_STATIC=ON
+			-DLIBCXX_CXX_ABI=libcxxabi
+			-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+			-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+			-DLIBCXX_HAS_GCC_S_LIB=OFF
+			-DLIBCXX_INCLUDE_TESTS=OFF
+			-DLIBCXX_INCLUDE_BENCHMARKS=OFF
+		)
+	fi
+
+	cmake_src_configure
+}
+
+multilib_src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-unwind
+}
+
+multilib_src_install() {
+	DESTDIR=${D} cmake_build install-unwind
+}