13 files changed, 1019 insertions, 0 deletions
diff --git a/sys-libs/Manifest.gz b/sys-libs/Manifest.gz
index 7b81d5f7bafd..beaf19b9f52a 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 0d31278324f4..b9077219585a 100644
--- a/sys-libs/compiler-rt-sanitizers/Manifest
+++ b/sys-libs/compiler-rt-sanitizers/Manifest
@@ -8,12 +8,15 @@ 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-18.1.3.src.tar.xz 132049300 BLAKE2B 0681177cfe6a65f5cf11942381078388e8f5d9d5a4bb50b040e4c10a3898e7311ff379fcca008e82e4bef225792a38eb77f722c972725b9251a0fda29d8d7ecc SHA512 b8b8a00c560bc7d4c4b5d533b92dbd52f2c0254f0acf687e787e8b7fa780cd5d96f6e9709356d2c406c0b36b186dee4de6b1bc1928a97de0bda863fa873e0783
 DIST llvm-project-18.1.3.src.tar.xz.sig 566 BLAKE2B dcecf41346cc864c6e5bedd3a7db3db4f32a68534364d2537a15ca7e4e2f2d35a22722385ac556d2a4ac48ab37567566094f223534e696299f98040e702146d0 SHA512 b7e50779841891e9ed9de5ed917c5be3209a52a5d98c67a032509ae8fad8a2a882bf619c66d2ee45bb53dfb03d750cb94dc4b2750ec2a8edb0465700d5bc657c
+DIST llvm-project-18.1.4.src.tar.xz 132054668 BLAKE2B 94bbad3b185fd07cbace4eff79aba80fbdd5e072739250e3927fe1848bcf3f8d355eb1f384e57306707eb702acc7ab01b732590735be7950221607664d04b0a6 SHA512 b1b214ae91f3705d8ea345547ad53f1e5d7d884c1eb6958bc41c14ac4b3e407771ccc2b693686ff103c8232c2c3942731d6db9a9cb4f735e6c6a0674739d0b29
+DIST llvm-project-18.1.4.src.tar.xz.sig 566 BLAKE2B b74fd219d7bcdf197b4e711cfbb25c40e9d8d2c7341de0215d8c31f330f396e9c166ff63513829cdc9cef349f08238f66a4dc949fa97958a7af496abae369eaa SHA512 4f456edf4fb454815acaef6855b1a0991f229810a32e9369af83388e37f0ef8964308e1e93bd6216024cdd67e86caaadc8d5794467857cc6fe561c9fa6ca7386
 DIST llvm-project-a8b0ecd2605ff23f495a8af64e06c35f86834e54.tar.gz 208451583 BLAKE2B 3f8557637b9d10ed924cfec0b3e83d85996417df24b317cac55740aa199ef97cf7560fe634debd1dbfc7c9fc25aa2b2643fccaecc4c866481dc57b11eba1d02f SHA512 1f4bf5a8a59582af426ad13cc828e1e482c5c831ed5a4bb0da419ed3cf67e5e485fd36074603ad22328e35be44b8ccd2d92d1382bc7a228fdf38d458a2321e07
 DIST llvm-project-ee284d2da0720dc21191d6f545504cbfcf5dcbcf.tar.gz 208883034 BLAKE2B e37c9f1a6a4d0caa9a3091f979dd09f509d458f8b7b30286c77dd2385aea748b7aac6dd488c79573f82feb655aa321717bd2fb46bba4a12b388b52064f6e13bf SHA512 1335ade87cd2accc47ac47ed2ab302999e375808b158b6c9d31fac9059cbb992d2bdaaadf1fd9a1b37268c1123d43346ea4d150894d6d2e6f80ba790b65b93b1
 EBUILD compiler-rt-sanitizers-15.0.7.ebuild 6648 BLAKE2B 89d90e750bc9c3c35e8a42a259fd84bc147ed9b7ed66168435f0010ef8adaf35e04e2cd43c1acc144668e04f5c229ca3cfd99aeb01b4ba2e46f10dd4615e131d SHA512 4f290993d65b7a17280c5ea9a9d19e13cefdde3aebc2236271e02bb1517655895e8eb3adc2047a849ce11dbacf8d7eddec715ab14523122089d856c21ae123a0
 EBUILD compiler-rt-sanitizers-16.0.6.ebuild 6615 BLAKE2B 3ca63eefd87ce02510afa912e809895da7356a8e248f402f3fca1583048feebf80cba20f076e1b28fa4ad7f7c06781910948fc49d980b03276a900dc75114e06 SHA512 7f34e0416b520c75457f8267f28630f7a665f05e22d3f5c2d96ea631fcda79a584b6c0e75cba8b7fba7bf28b87a6b19b49be3b4b8770393caabc5ebc83831ebe
 EBUILD compiler-rt-sanitizers-17.0.6.ebuild 6447 BLAKE2B 553a762d6dd06dafca05953f4d60e5e3dd215d813da29053d5c4c44750554e3ed90c187390196eeee3bc85bb1e3fbdac7aa2e100b623271898478003792a1302 SHA512 6beaa92bf1ba5213dc9c73395ecdae737f1a84119da6e3f8f008f9f21cf7d7b08b3634ad8768af6b19992fd49d964344c7d37e19b7c7bfec02af644bdc730bbd
 EBUILD compiler-rt-sanitizers-18.1.3.ebuild 6358 BLAKE2B d68fe00a7d79a022d2c66f03d1987491c7d382158426a5f27923f84df05cf5d27697abacad984e94a5b5f333bcd1e60d080ebbc4708f4abe77086bc777aeaaf5 SHA512 fcaf7d7203ede21db563de3b24bbf4d2939856913ba5ee3fff4f29eef18d6e93789791bc3e0d0b4ecd761fd7e8772b3a9f7ea5149300a22f99ee46e6caafbcd9
+EBUILD compiler-rt-sanitizers-18.1.4.ebuild 6358 BLAKE2B d68fe00a7d79a022d2c66f03d1987491c7d382158426a5f27923f84df05cf5d27697abacad984e94a5b5f333bcd1e60d080ebbc4708f4abe77086bc777aeaaf5 SHA512 fcaf7d7203ede21db563de3b24bbf4d2939856913ba5ee3fff4f29eef18d6e93789791bc3e0d0b4ecd761fd7e8772b3a9f7ea5149300a22f99ee46e6caafbcd9
 EBUILD compiler-rt-sanitizers-19.0.0.9999.ebuild 6268 BLAKE2B 98422f1f8be179031ffed4ea9176843521842aff5be2cbdcb21f6ea2020a8d13a1c6fc4810e769c0ec0775f92af45831c4385cc70680765f474885c5ad5b389f SHA512 8677df281de24325290cb99cc4f6087460443c716ac2eea7b3c8175281daad874cd7aab0dda8f4d60213a1b73a8f1a921ae7ad0733d104a7db0e8e5f2ac35127
 EBUILD compiler-rt-sanitizers-19.0.0_pre20240330.ebuild 6268 BLAKE2B 98422f1f8be179031ffed4ea9176843521842aff5be2cbdcb21f6ea2020a8d13a1c6fc4810e769c0ec0775f92af45831c4385cc70680765f474885c5ad5b389f SHA512 8677df281de24325290cb99cc4f6087460443c716ac2eea7b3c8175281daad874cd7aab0dda8f4d60213a1b73a8f1a921ae7ad0733d104a7db0e8e5f2ac35127
 EBUILD compiler-rt-sanitizers-19.0.0_pre20240404.ebuild 6268 BLAKE2B 98422f1f8be179031ffed4ea9176843521842aff5be2cbdcb21f6ea2020a8d13a1c6fc4810e769c0ec0775f92af45831c4385cc70680765f474885c5ad5b389f SHA512 8677df281de24325290cb99cc4f6087460443c716ac2eea7b3c8175281daad874cd7aab0dda8f4d60213a1b73a8f1a921ae7ad0733d104a7db0e8e5f2ac35127
diff --git a/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-18.1.4.ebuild b/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-18.1.4.ebuild
new file mode 100644
index 000000000000..192ead8311f8
--- /dev/null
+++ b/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-18.1.4.ebuild
@@ -0,0 +1,218 @@
+# Copyright 1999-2024 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.org llvm-utils 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}"
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc64 ~riscv ~x86 ~amd64-linux ~ppc-macos ~x64-macos"
+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="
+	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
+	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_prepend_path "${LLVM_MAJOR}"
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${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 382001810096..b1fb0d09f524 100644
--- a/sys-libs/compiler-rt/Manifest
+++ b/sys-libs/compiler-rt/Manifest
@@ -10,6 +10,8 @@ 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-18.1.3.src.tar.xz 132049300 BLAKE2B 0681177cfe6a65f5cf11942381078388e8f5d9d5a4bb50b040e4c10a3898e7311ff379fcca008e82e4bef225792a38eb77f722c972725b9251a0fda29d8d7ecc SHA512 b8b8a00c560bc7d4c4b5d533b92dbd52f2c0254f0acf687e787e8b7fa780cd5d96f6e9709356d2c406c0b36b186dee4de6b1bc1928a97de0bda863fa873e0783
 DIST llvm-project-18.1.3.src.tar.xz.sig 566 BLAKE2B dcecf41346cc864c6e5bedd3a7db3db4f32a68534364d2537a15ca7e4e2f2d35a22722385ac556d2a4ac48ab37567566094f223534e696299f98040e702146d0 SHA512 b7e50779841891e9ed9de5ed917c5be3209a52a5d98c67a032509ae8fad8a2a882bf619c66d2ee45bb53dfb03d750cb94dc4b2750ec2a8edb0465700d5bc657c
+DIST llvm-project-18.1.4.src.tar.xz 132054668 BLAKE2B 94bbad3b185fd07cbace4eff79aba80fbdd5e072739250e3927fe1848bcf3f8d355eb1f384e57306707eb702acc7ab01b732590735be7950221607664d04b0a6 SHA512 b1b214ae91f3705d8ea345547ad53f1e5d7d884c1eb6958bc41c14ac4b3e407771ccc2b693686ff103c8232c2c3942731d6db9a9cb4f735e6c6a0674739d0b29
+DIST llvm-project-18.1.4.src.tar.xz.sig 566 BLAKE2B b74fd219d7bcdf197b4e711cfbb25c40e9d8d2c7341de0215d8c31f330f396e9c166ff63513829cdc9cef349f08238f66a4dc949fa97958a7af496abae369eaa SHA512 4f456edf4fb454815acaef6855b1a0991f229810a32e9369af83388e37f0ef8964308e1e93bd6216024cdd67e86caaadc8d5794467857cc6fe561c9fa6ca7386
 DIST llvm-project-a8b0ecd2605ff23f495a8af64e06c35f86834e54.tar.gz 208451583 BLAKE2B 3f8557637b9d10ed924cfec0b3e83d85996417df24b317cac55740aa199ef97cf7560fe634debd1dbfc7c9fc25aa2b2643fccaecc4c866481dc57b11eba1d02f SHA512 1f4bf5a8a59582af426ad13cc828e1e482c5c831ed5a4bb0da419ed3cf67e5e485fd36074603ad22328e35be44b8ccd2d92d1382bc7a228fdf38d458a2321e07
 DIST llvm-project-ee284d2da0720dc21191d6f545504cbfcf5dcbcf.tar.gz 208883034 BLAKE2B e37c9f1a6a4d0caa9a3091f979dd09f509d458f8b7b30286c77dd2385aea748b7aac6dd488c79573f82feb655aa321717bd2fb46bba4a12b388b52064f6e13bf SHA512 1335ade87cd2accc47ac47ed2ab302999e375808b158b6c9d31fac9059cbb992d2bdaaadf1fd9a1b37268c1123d43346ea4d150894d6d2e6f80ba790b65b93b1
 EBUILD compiler-rt-15.0.7.ebuild 4238 BLAKE2B 22d56dbe24c92400bf58942390b06af70fddba89d8fecc9b85162dd7a41c6ee592eaaf883f5ad483f65f74fabccc28f94528688410ee36e2d5279efcc6066de0 SHA512 ca49d23def580d4dcfc4058768eeb9deb6e59ea44575da272d1c142fffe0bf4e3d3c7c9fa6182ab348a3aab11879af116a549cb1a3a03b27b4bf4151cf892aaa
@@ -17,6 +19,7 @@ EBUILD compiler-rt-16.0.6-r4.ebuild 5226 BLAKE2B 7d2d76d79ce49f3d175de87fa982439
 EBUILD compiler-rt-16.0.6.ebuild 5198 BLAKE2B 2fe2310703d44d330d97b1fa1b407d99898070604037be31ca762fe65043e1d3d1e046298dc74f3d0cbb3493f985661e362b217170cbe1bf74a47dddfe8987ca SHA512 cc9aabc22f689bfc677ceb74793441674aeca2586a28ff96b812af4822d1b8b5a4147484e41f0bf95ae995488d3e8ee77684fd684b9dab8ade4f1fa57e80c709
 EBUILD compiler-rt-17.0.6.ebuild 5218 BLAKE2B 3f488320228fd2a3d1caed790e8e21c7c363769c4d8b912fd5a964b4e802e1b58b297336c527b451edb74ff42c4bdd236795210c4f225ca98a6980fed95d6771 SHA512 abbe2f679a1af7c012ecae32b57b244f7ad84a5d44151a4b7ad799524061f8b65504bd6aa169a91d1a16b878845f40b47e4a1f0253a3ff9ccbe8dbb736db1fb1
 EBUILD compiler-rt-18.1.3.ebuild 4971 BLAKE2B 74a850ae9ab5c05d0806f6fb6403b7b54141cb0fe43b0e2bfca44d0eb7a25579d390988082fc277b21a66e3b978a37ad9ed1c39ace261aeabf1ab230427e5f3e SHA512 23283ed4a7b7704a4237ec2628633ce81554d501fae10391b90e1983dfb64d86c9dc0d7cbe8d3ae2525591377fac783ae6c1dae8093596ad2ac7d6dda911433b
+EBUILD compiler-rt-18.1.4.ebuild 4971 BLAKE2B 74a850ae9ab5c05d0806f6fb6403b7b54141cb0fe43b0e2bfca44d0eb7a25579d390988082fc277b21a66e3b978a37ad9ed1c39ace261aeabf1ab230427e5f3e SHA512 23283ed4a7b7704a4237ec2628633ce81554d501fae10391b90e1983dfb64d86c9dc0d7cbe8d3ae2525591377fac783ae6c1dae8093596ad2ac7d6dda911433b
 EBUILD compiler-rt-19.0.0.9999.ebuild 4868 BLAKE2B 479ff19239f03c3bcb25cde41a2cb5c6a9a8569e376fc08a2a5affd62bc766a85d68ea080570a373d6f3258c0b1f96211bbe552e82255186ad105fca88f597a0 SHA512 4e19eaf37ca1d3d140be8a4d2bad0f3d69d62c0884d131aac9b3ee4bc58a5e1dd4ca0540cc1153cc293c9bd9521bea1688f7f2b298ca8a24c4c0aedc20d3d753
 EBUILD compiler-rt-19.0.0_pre20240330.ebuild 4868 BLAKE2B 479ff19239f03c3bcb25cde41a2cb5c6a9a8569e376fc08a2a5affd62bc766a85d68ea080570a373d6f3258c0b1f96211bbe552e82255186ad105fca88f597a0 SHA512 4e19eaf37ca1d3d140be8a4d2bad0f3d69d62c0884d131aac9b3ee4bc58a5e1dd4ca0540cc1153cc293c9bd9521bea1688f7f2b298ca8a24c4c0aedc20d3d753
 EBUILD compiler-rt-19.0.0_pre20240404.ebuild 4868 BLAKE2B 479ff19239f03c3bcb25cde41a2cb5c6a9a8569e376fc08a2a5affd62bc766a85d68ea080570a373d6f3258c0b1f96211bbe552e82255186ad105fca88f597a0 SHA512 4e19eaf37ca1d3d140be8a4d2bad0f3d69d62c0884d131aac9b3ee4bc58a5e1dd4ca0540cc1153cc293c9bd9521bea1688f7f2b298ca8a24c4c0aedc20d3d753
diff --git a/sys-libs/compiler-rt/compiler-rt-18.1.4.ebuild b/sys-libs/compiler-rt/compiler-rt-18.1.4.ebuild
new file mode 100644
index 000000000000..e2a452caad61
--- /dev/null
+++ b/sys-libs/compiler-rt/compiler-rt-18.1.4.ebuild
@@ -0,0 +1,172 @@
+# Copyright 1999-2024 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.org llvm-utils python-any-r1
+inherit 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}"
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc64 ~riscv ~x86 ~amd64-linux ~arm64-macos ~ppc-macos ~x64-macos"
+IUSE="+abi_x86_32 abi_x86_64 +clang debug test"
+RESTRICT="!test? ( test ) !clang? ( test )"
+
+DEPEND="
+	sys-devel/llvm:${LLVM_MAJOR}
+"
+BDEPEND="
+	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() {
+	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_prepend_path "${LLVM_MAJOR}"
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${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 77008c235744..7574dd364c17 100644
--- a/sys-libs/libcxx/Manifest
+++ b/sys-libs/libcxx/Manifest
@@ -9,12 +9,15 @@ 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-18.1.3.src.tar.xz 132049300 BLAKE2B 0681177cfe6a65f5cf11942381078388e8f5d9d5a4bb50b040e4c10a3898e7311ff379fcca008e82e4bef225792a38eb77f722c972725b9251a0fda29d8d7ecc SHA512 b8b8a00c560bc7d4c4b5d533b92dbd52f2c0254f0acf687e787e8b7fa780cd5d96f6e9709356d2c406c0b36b186dee4de6b1bc1928a97de0bda863fa873e0783
 DIST llvm-project-18.1.3.src.tar.xz.sig 566 BLAKE2B dcecf41346cc864c6e5bedd3a7db3db4f32a68534364d2537a15ca7e4e2f2d35a22722385ac556d2a4ac48ab37567566094f223534e696299f98040e702146d0 SHA512 b7e50779841891e9ed9de5ed917c5be3209a52a5d98c67a032509ae8fad8a2a882bf619c66d2ee45bb53dfb03d750cb94dc4b2750ec2a8edb0465700d5bc657c
+DIST llvm-project-18.1.4.src.tar.xz 132054668 BLAKE2B 94bbad3b185fd07cbace4eff79aba80fbdd5e072739250e3927fe1848bcf3f8d355eb1f384e57306707eb702acc7ab01b732590735be7950221607664d04b0a6 SHA512 b1b214ae91f3705d8ea345547ad53f1e5d7d884c1eb6958bc41c14ac4b3e407771ccc2b693686ff103c8232c2c3942731d6db9a9cb4f735e6c6a0674739d0b29
+DIST llvm-project-18.1.4.src.tar.xz.sig 566 BLAKE2B b74fd219d7bcdf197b4e711cfbb25c40e9d8d2c7341de0215d8c31f330f396e9c166ff63513829cdc9cef349f08238f66a4dc949fa97958a7af496abae369eaa SHA512 4f456edf4fb454815acaef6855b1a0991f229810a32e9369af83388e37f0ef8964308e1e93bd6216024cdd67e86caaadc8d5794467857cc6fe561c9fa6ca7386
 DIST llvm-project-a8b0ecd2605ff23f495a8af64e06c35f86834e54.tar.gz 208451583 BLAKE2B 3f8557637b9d10ed924cfec0b3e83d85996417df24b317cac55740aa199ef97cf7560fe634debd1dbfc7c9fc25aa2b2643fccaecc4c866481dc57b11eba1d02f SHA512 1f4bf5a8a59582af426ad13cc828e1e482c5c831ed5a4bb0da419ed3cf67e5e485fd36074603ad22328e35be44b8ccd2d92d1382bc7a228fdf38d458a2321e07
 DIST llvm-project-ee284d2da0720dc21191d6f545504cbfcf5dcbcf.tar.gz 208883034 BLAKE2B e37c9f1a6a4d0caa9a3091f979dd09f509d458f8b7b30286c77dd2385aea748b7aac6dd488c79573f82feb655aa321717bd2fb46bba4a12b388b52064f6e13bf SHA512 1335ade87cd2accc47ac47ed2ab302999e375808b158b6c9d31fac9059cbb992d2bdaaadf1fd9a1b37268c1123d43346ea4d150894d6d2e6f80ba790b65b93b1
 EBUILD libcxx-15.0.7-r1.ebuild 5283 BLAKE2B 4380fc5b851054a5ec226ee4c92a2b79511d73ac9b3f8bccc977211601eca36113fc0ae605854da53898507021f24a8b319197605c556244d84253bede7b84f4 SHA512 0a5859269422e794deb43ed960651a1dea830af28b5e395f32e28de8e67a1f399507340230af1c84248853f554e751709a60a9a78aeb0eb42804cb41907dbfce
 EBUILD libcxx-16.0.6.ebuild 5300 BLAKE2B 4714e22ad2fdcb07c62ead4cfa47fb4734e45dc055700b63a0f24cd6e93dde960c638fa16f55f4c04c6130fc2a7fa5729814c4aee12e9953f603ea5ccb706cc1 SHA512 3eab779107b5c737d971abe29b7bd9f44a73570957bd7d54d6aaa98ec78a6045d7d69272d611f7f09c60e1aa30bbad46b4bd1358b0b2c69e5bc686ab21444857
 EBUILD libcxx-17.0.6.ebuild 5280 BLAKE2B a882313471af07942a0772efa642800ba85545227f7dfe281cd7fcdc686ecda82692d273550b28cca2de47b1b9fda87717c98c52ffafdf1155d5269a3733f48a SHA512 d9a2932d7b9e26dea0e62dfd3aeac08ad0206a242d3d42d83e55b93cc767195a67bc0eb3da38cb8d51930175f94bac6496184d6d4be516014e0208c3f852d427
 EBUILD libcxx-18.1.3.ebuild 5447 BLAKE2B 262f4dd0ccb046dcdf7f6970350381a9a48530f7db546f1b6cef5493b5e2a657a403bb0b5fda0d2d100420c6f8f1bac82f635efa8ad6c70d4476ad101c35eb13 SHA512 74ddb2227a2c8cd3d106861dc8155720f757011933835a36b8a5c133de68db80c14d93ad0cd8c3fa62232ce1e0871889b6db15c4bd53d2c1ea34762d93addc0c
+EBUILD libcxx-18.1.4.ebuild 5447 BLAKE2B 262f4dd0ccb046dcdf7f6970350381a9a48530f7db546f1b6cef5493b5e2a657a403bb0b5fda0d2d100420c6f8f1bac82f635efa8ad6c70d4476ad101c35eb13 SHA512 74ddb2227a2c8cd3d106861dc8155720f757011933835a36b8a5c133de68db80c14d93ad0cd8c3fa62232ce1e0871889b6db15c4bd53d2c1ea34762d93addc0c
 EBUILD libcxx-19.0.0.9999.ebuild 5397 BLAKE2B 800024bbb9b69c7c159d05bf481db08bfb4c89b93a517410a892cd80a0a0bbf07119d0babcc952283bfc4dff51dd4ea4253a63cbc3f301db6e281074e4a2061a SHA512 61a3676d06d6e5f44e5a6f0de8f05c0af5384c3e940b2f504bddbe6b9a806ae5c5ff8311f6986a284338761e554894ddb1bec7f5e1b324a6e211b1d60f0eb635
 EBUILD libcxx-19.0.0_pre20240330.ebuild 5397 BLAKE2B 800024bbb9b69c7c159d05bf481db08bfb4c89b93a517410a892cd80a0a0bbf07119d0babcc952283bfc4dff51dd4ea4253a63cbc3f301db6e281074e4a2061a SHA512 61a3676d06d6e5f44e5a6f0de8f05c0af5384c3e940b2f504bddbe6b9a806ae5c5ff8311f6986a284338761e554894ddb1bec7f5e1b324a6e211b1d60f0eb635
 EBUILD libcxx-19.0.0_pre20240404.ebuild 5397 BLAKE2B 800024bbb9b69c7c159d05bf481db08bfb4c89b93a517410a892cd80a0a0bbf07119d0babcc952283bfc4dff51dd4ea4253a63cbc3f301db6e281074e4a2061a SHA512 61a3676d06d6e5f44e5a6f0de8f05c0af5384c3e940b2f504bddbe6b9a806ae5c5ff8311f6986a284338761e554894ddb1bec7f5e1b324a6e211b1d60f0eb635
diff --git a/sys-libs/libcxx/libcxx-18.1.4.ebuild b/sys-libs/libcxx/libcxx-18.1.4.ebuild
new file mode 100644
index 000000000000..a6fca47e6c29
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-18.1.4.ebuild
@@ -0,0 +1,210 @@
+# Copyright 1999-2024 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.org llvm-utils python-any-r1
+inherit 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="~amd64 ~arm ~arm64 ~loong ~riscv ~sparc ~x86 ~arm64-macos ~x64-macos"
+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-debug/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() {
+	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() {
+	llvm_prepend_path "${LLVM_MAJOR}"
+
+	# note: we need to do this before multilib kicks in since it will
+	# alter the CHOST
+	local cxxabi cxxabi_incs
+	if use libcxxabi; then
+		cxxabi=system-libcxxabi
+		cxxabi_incs="${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=${use_compiler_rt}
+		# this is broken with standalone builds, and also meaningless
+		-DLIBCXXABI_USE_LLVM_UNWINDER=OFF
+	)
+
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags)"
+			-DPython3_EXECUTABLE="${PYTHON}"
+		)
+	fi
+	cmake_src_configure
+}
+
+multilib_src_compile() {
+	cmake_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 20dfbea211bb..cd835cc65b52 100644
--- a/sys-libs/libcxxabi/Manifest
+++ b/sys-libs/libcxxabi/Manifest
@@ -7,12 +7,15 @@ 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-18.1.3.src.tar.xz 132049300 BLAKE2B 0681177cfe6a65f5cf11942381078388e8f5d9d5a4bb50b040e4c10a3898e7311ff379fcca008e82e4bef225792a38eb77f722c972725b9251a0fda29d8d7ecc SHA512 b8b8a00c560bc7d4c4b5d533b92dbd52f2c0254f0acf687e787e8b7fa780cd5d96f6e9709356d2c406c0b36b186dee4de6b1bc1928a97de0bda863fa873e0783
 DIST llvm-project-18.1.3.src.tar.xz.sig 566 BLAKE2B dcecf41346cc864c6e5bedd3a7db3db4f32a68534364d2537a15ca7e4e2f2d35a22722385ac556d2a4ac48ab37567566094f223534e696299f98040e702146d0 SHA512 b7e50779841891e9ed9de5ed917c5be3209a52a5d98c67a032509ae8fad8a2a882bf619c66d2ee45bb53dfb03d750cb94dc4b2750ec2a8edb0465700d5bc657c
+DIST llvm-project-18.1.4.src.tar.xz 132054668 BLAKE2B 94bbad3b185fd07cbace4eff79aba80fbdd5e072739250e3927fe1848bcf3f8d355eb1f384e57306707eb702acc7ab01b732590735be7950221607664d04b0a6 SHA512 b1b214ae91f3705d8ea345547ad53f1e5d7d884c1eb6958bc41c14ac4b3e407771ccc2b693686ff103c8232c2c3942731d6db9a9cb4f735e6c6a0674739d0b29
+DIST llvm-project-18.1.4.src.tar.xz.sig 566 BLAKE2B b74fd219d7bcdf197b4e711cfbb25c40e9d8d2c7341de0215d8c31f330f396e9c166ff63513829cdc9cef349f08238f66a4dc949fa97958a7af496abae369eaa SHA512 4f456edf4fb454815acaef6855b1a0991f229810a32e9369af83388e37f0ef8964308e1e93bd6216024cdd67e86caaadc8d5794467857cc6fe561c9fa6ca7386
 DIST llvm-project-a8b0ecd2605ff23f495a8af64e06c35f86834e54.tar.gz 208451583 BLAKE2B 3f8557637b9d10ed924cfec0b3e83d85996417df24b317cac55740aa199ef97cf7560fe634debd1dbfc7c9fc25aa2b2643fccaecc4c866481dc57b11eba1d02f SHA512 1f4bf5a8a59582af426ad13cc828e1e482c5c831ed5a4bb0da419ed3cf67e5e485fd36074603ad22328e35be44b8ccd2d92d1382bc7a228fdf38d458a2321e07
 DIST llvm-project-ee284d2da0720dc21191d6f545504cbfcf5dcbcf.tar.gz 208883034 BLAKE2B e37c9f1a6a4d0caa9a3091f979dd09f509d458f8b7b30286c77dd2385aea748b7aac6dd488c79573f82feb655aa321717bd2fb46bba4a12b388b52064f6e13bf SHA512 1335ade87cd2accc47ac47ed2ab302999e375808b158b6c9d31fac9059cbb992d2bdaaadf1fd9a1b37268c1123d43346ea4d150894d6d2e6f80ba790b65b93b1
 EBUILD libcxxabi-15.0.7.ebuild 2911 BLAKE2B 5f2004d2f68fe4eddb0b22be82d28fcca7954d0e3ad9a5510744adc4d0dfd7a1ab9fd928404adcd3eeecc58703f51117d0a80e5895b53e0ae7b71621ad5a435c SHA512 5b8e2c6abdec785649aa41b7f05ab86ecab30ff0631d6078c9b1052b406c320c5847b8f16ffa6d9e62ba4a6bca5959b18770810924d6e6da264fb08d6ff738d0
 EBUILD libcxxabi-16.0.6.ebuild 2932 BLAKE2B 837ab88ee88d5497b8bddb9f001d4b4ddd44ed982ef47114c965174135ed136abd0e3a6f3848a4aba53d0ca3748c54674cb28de8d46fda3bb7a90f326d41c7c6 SHA512 e4ebf7f35d2cad3bf3ba02754c85fee1cd1c4e52887770698ebaa3ef2fe66873f468677d307ea2d6956c2f6d3ac9b61943461193a5315f1e8a2846f2463b0581
 EBUILD libcxxabi-17.0.6.ebuild 2932 BLAKE2B 837ab88ee88d5497b8bddb9f001d4b4ddd44ed982ef47114c965174135ed136abd0e3a6f3848a4aba53d0ca3748c54674cb28de8d46fda3bb7a90f326d41c7c6 SHA512 e4ebf7f35d2cad3bf3ba02754c85fee1cd1c4e52887770698ebaa3ef2fe66873f468677d307ea2d6956c2f6d3ac9b61943461193a5315f1e8a2846f2463b0581
 EBUILD libcxxabi-18.1.3.ebuild 2764 BLAKE2B 1d716983ec2cf1f3ad73b9a3947feb5deddd91750495d7fe5eb9d3ecea9545c7dd4bde00a348272e92aec46845286f9a844077ece2b91a80222bae44c22a514b SHA512 7d94d2fe04acbbc8651c1b7588f9b94603de10aaefc949aaa408d7e7f8d53ccca9b411a2a7f3af7edc2a4f05008977dddd039c7ac1cf17968ba59c7484b3bb68
+EBUILD libcxxabi-18.1.4.ebuild 2764 BLAKE2B 1d716983ec2cf1f3ad73b9a3947feb5deddd91750495d7fe5eb9d3ecea9545c7dd4bde00a348272e92aec46845286f9a844077ece2b91a80222bae44c22a514b SHA512 7d94d2fe04acbbc8651c1b7588f9b94603de10aaefc949aaa408d7e7f8d53ccca9b411a2a7f3af7edc2a4f05008977dddd039c7ac1cf17968ba59c7484b3bb68
 EBUILD libcxxabi-19.0.0.9999.ebuild 2684 BLAKE2B d72cf1584537afd3d13263975a4f903819f6844cac728daab626b269f460865cac59c3199d38ced179ce041294db940b31f07ca74eeabd452f8e2f775e3e206d SHA512 ac7f20fa097c17349959154cce8c75a2083b04d4fb1241d6917c0fd14348a848f9158d050b9791754fc02ec4cd1bc2d82a8ef678a7b025e15524e5af945c9bc1
 EBUILD libcxxabi-19.0.0_pre20240330.ebuild 2684 BLAKE2B d72cf1584537afd3d13263975a4f903819f6844cac728daab626b269f460865cac59c3199d38ced179ce041294db940b31f07ca74eeabd452f8e2f775e3e206d SHA512 ac7f20fa097c17349959154cce8c75a2083b04d4fb1241d6917c0fd14348a848f9158d050b9791754fc02ec4cd1bc2d82a8ef678a7b025e15524e5af945c9bc1
 EBUILD libcxxabi-19.0.0_pre20240404.ebuild 2684 BLAKE2B d72cf1584537afd3d13263975a4f903819f6844cac728daab626b269f460865cac59c3199d38ced179ce041294db940b31f07ca74eeabd452f8e2f775e3e206d SHA512 ac7f20fa097c17349959154cce8c75a2083b04d4fb1241d6917c0fd14348a848f9158d050b9791754fc02ec4cd1bc2d82a8ef678a7b025e15524e5af945c9bc1
diff --git a/sys-libs/libcxxabi/libcxxabi-18.1.4.ebuild b/sys-libs/libcxxabi/libcxxabi-18.1.4.ebuild
new file mode 100644
index 000000000000..8865a2ce4c2c
--- /dev/null
+++ b/sys-libs/libcxxabi/libcxxabi-18.1.4.ebuild
@@ -0,0 +1,111 @@
+# Copyright 1999-2024 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.org llvm-utils python-any-r1
+inherit 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"
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~riscv ~sparc ~x86 ~arm64-macos ~x64-macos"
+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[${PYTHON_USEDEP}]"
+}
+
+multilib_src_configure() {
+	llvm_prepend_path "${LLVM_MAJOR}"
+
+	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="${EPREFIX}"/usr/include
+		# this is broken with standalone builds, and also meaningless
+		-DLIBCXXABI_USE_LLVM_UNWINDER=OFF
+
+		-DLIBCXX_LIBDIR_SUFFIX=
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=OFF
+		-DLIBCXX_CXX_ABI=libcxxabi
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(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 4d5b2a984a22..c2064e66abad 100644
--- a/sys-libs/libomp/Manifest
+++ b/sys-libs/libomp/Manifest
@@ -8,12 +8,15 @@ 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-18.1.3.src.tar.xz 132049300 BLAKE2B 0681177cfe6a65f5cf11942381078388e8f5d9d5a4bb50b040e4c10a3898e7311ff379fcca008e82e4bef225792a38eb77f722c972725b9251a0fda29d8d7ecc SHA512 b8b8a00c560bc7d4c4b5d533b92dbd52f2c0254f0acf687e787e8b7fa780cd5d96f6e9709356d2c406c0b36b186dee4de6b1bc1928a97de0bda863fa873e0783
 DIST llvm-project-18.1.3.src.tar.xz.sig 566 BLAKE2B dcecf41346cc864c6e5bedd3a7db3db4f32a68534364d2537a15ca7e4e2f2d35a22722385ac556d2a4ac48ab37567566094f223534e696299f98040e702146d0 SHA512 b7e50779841891e9ed9de5ed917c5be3209a52a5d98c67a032509ae8fad8a2a882bf619c66d2ee45bb53dfb03d750cb94dc4b2750ec2a8edb0465700d5bc657c
+DIST llvm-project-18.1.4.src.tar.xz 132054668 BLAKE2B 94bbad3b185fd07cbace4eff79aba80fbdd5e072739250e3927fe1848bcf3f8d355eb1f384e57306707eb702acc7ab01b732590735be7950221607664d04b0a6 SHA512 b1b214ae91f3705d8ea345547ad53f1e5d7d884c1eb6958bc41c14ac4b3e407771ccc2b693686ff103c8232c2c3942731d6db9a9cb4f735e6c6a0674739d0b29
+DIST llvm-project-18.1.4.src.tar.xz.sig 566 BLAKE2B b74fd219d7bcdf197b4e711cfbb25c40e9d8d2c7341de0215d8c31f330f396e9c166ff63513829cdc9cef349f08238f66a4dc949fa97958a7af496abae369eaa SHA512 4f456edf4fb454815acaef6855b1a0991f229810a32e9369af83388e37f0ef8964308e1e93bd6216024cdd67e86caaadc8d5794467857cc6fe561c9fa6ca7386
 DIST llvm-project-a8b0ecd2605ff23f495a8af64e06c35f86834e54.tar.gz 208451583 BLAKE2B 3f8557637b9d10ed924cfec0b3e83d85996417df24b317cac55740aa199ef97cf7560fe634debd1dbfc7c9fc25aa2b2643fccaecc4c866481dc57b11eba1d02f SHA512 1f4bf5a8a59582af426ad13cc828e1e482c5c831ed5a4bb0da419ed3cf67e5e485fd36074603ad22328e35be44b8ccd2d92d1382bc7a228fdf38d458a2321e07
 DIST llvm-project-ee284d2da0720dc21191d6f545504cbfcf5dcbcf.tar.gz 208883034 BLAKE2B e37c9f1a6a4d0caa9a3091f979dd09f509d458f8b7b30286c77dd2385aea748b7aac6dd488c79573f82feb655aa321717bd2fb46bba4a12b388b52064f6e13bf SHA512 1335ade87cd2accc47ac47ed2ab302999e375808b158b6c9d31fac9059cbb992d2bdaaadf1fd9a1b37268c1123d43346ea4d150894d6d2e6f80ba790b65b93b1
 EBUILD libomp-15.0.7-r6.ebuild 3470 BLAKE2B 9f76ca5b080ccf01617d7dcbfe3eb424c525adbcf72f2b5f09dc7bead1e28df1a0ffdf5ef47bcc7f8cac130f1d22e804e29938cda6df0ee58359ac5ff88aea86 SHA512 1a0a4b10f9a67634ea265e6df3c3f9993ed5ee3818eba2cbb6b65d8f5c3a0d2d266134f3e276985e87eca18b47a44d6de61e4c9c3496fd36c6c338dcf79b9850
 EBUILD libomp-16.0.6.ebuild 3984 BLAKE2B 8302d2776c0d8c50dcc7cac2dde8523f1abdf391d48594fdd26ebe17a089efdfee93825bdec07569878d06873b571e469411f108564df6c7eb50dc425615c255 SHA512 714da170fba4b62f3267e2530a82c583d299e8dc6c6f4037417c216c1239cc0fadc1aebf823608df37a932a7722144e67a148b58079e50560450b94c93f3e415
 EBUILD libomp-17.0.6.ebuild 3984 BLAKE2B 8302d2776c0d8c50dcc7cac2dde8523f1abdf391d48594fdd26ebe17a089efdfee93825bdec07569878d06873b571e469411f108564df6c7eb50dc425615c255 SHA512 714da170fba4b62f3267e2530a82c583d299e8dc6c6f4037417c216c1239cc0fadc1aebf823608df37a932a7722144e67a148b58079e50560450b94c93f3e415
 EBUILD libomp-18.1.3.ebuild 4287 BLAKE2B c9d7f07576235ab057e30adee2b922250bd978e7d7877f959c08ed63abb4b6c88a84e0e9726023b0597ad9f303fefe9a7bd400c9d984828a9883bc37d8cd0b7a SHA512 4fe7c6b3a725d7f41cef543414a6f082812645342e352b8efcb466f1a257eefdec95c2a29bbc750fdf0b1e8f501923f23f0c771de20eb52bcc0cdf02bfa042a0
+EBUILD libomp-18.1.4.ebuild 4287 BLAKE2B c9d7f07576235ab057e30adee2b922250bd978e7d7877f959c08ed63abb4b6c88a84e0e9726023b0597ad9f303fefe9a7bd400c9d984828a9883bc37d8cd0b7a SHA512 4fe7c6b3a725d7f41cef543414a6f082812645342e352b8efcb466f1a257eefdec95c2a29bbc750fdf0b1e8f501923f23f0c771de20eb52bcc0cdf02bfa042a0
 EBUILD libomp-19.0.0.9999.ebuild 4208 BLAKE2B 9ed99689a6cbf2d1c3f8f384e046276247f1e3a21cfd1466ae640b21b748ae38fccf29e36be3e87c76859888670f14b8cfad29922275f2f937f284062d931462 SHA512 573165cd67e695dd9140cd8fa6e7e6324e8a7de2b35ae5d2563012eeda275edccbe9daa369752960d3c287c4e55bd767ab2b5e29db604e381c752143eb9b1a3e
 EBUILD libomp-19.0.0_pre20240330.ebuild 4208 BLAKE2B 9ed99689a6cbf2d1c3f8f384e046276247f1e3a21cfd1466ae640b21b748ae38fccf29e36be3e87c76859888670f14b8cfad29922275f2f937f284062d931462 SHA512 573165cd67e695dd9140cd8fa6e7e6324e8a7de2b35ae5d2563012eeda275edccbe9daa369752960d3c287c4e55bd767ab2b5e29db604e381c752143eb9b1a3e
 EBUILD libomp-19.0.0_pre20240404.ebuild 4208 BLAKE2B 9ed99689a6cbf2d1c3f8f384e046276247f1e3a21cfd1466ae640b21b748ae38fccf29e36be3e87c76859888670f14b8cfad29922275f2f937f284062d931462 SHA512 573165cd67e695dd9140cd8fa6e7e6324e8a7de2b35ae5d2563012eeda275edccbe9daa369752960d3c287c4e55bd767ab2b5e29db604e381c752143eb9b1a3e
diff --git a/sys-libs/libomp/libomp-18.1.4.ebuild b/sys-libs/libomp/libomp-18.1.4.ebuild
new file mode 100644
index 000000000000..5f6fa687234c
--- /dev/null
+++ b/sys-libs/libomp/libomp-18.1.4.ebuild
@@ -0,0 +1,161 @@
+# Copyright 1999-2024 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.org llvm-utils
+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}"
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc64 ~riscv ~x86 ~amd64-linux ~x64-macos"
+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() {
+	if use gdb-plugin || use test; then
+		python-single-r1_pkg_setup
+	fi
+}
+
+multilib_src_configure() {
+	use offload && llvm_prepend_path "${LLVM_MAJOR}"
+
+	# LTO causes issues in other packages building, #870127
+	filter-lto
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${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
+	)
+
+	if [[ ${build_omptarget} == ON ]]; then
+		local ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
+		local ffi_ldflags=$($(tc-getPKG_CONFIG) --libs-only-L libffi)
+		mycmakeargs+=(
+			-DFFI_INCLUDE_DIR="${ffi_cflags#-I}"
+			-DFFI_LIBRARY_DIR="${ffi_ldflags#-L}"
+		)
+
+		if has "${CHOST%%-*}" aarch64 powerpc64le x86_64; then
+			mycmakeargs+=(
+				-DLIBOMPTARGET_BUILD_AMDGPU_PLUGIN=$(usex llvm_targets_AMDGPU)
+				-DLIBOMPTARGET_BUILD_CUDA_PLUGIN=$(usex llvm_targets_NVPTX)
+
+				# prevent trying to access the GPU
+				-DLIBOMPTARGET_AMDGPU_ARCH=LIBOMPTARGET_AMDGPU_ARCH-NOTFOUND
+				-DLIBOMPTARGET_NVPTX_ARCH=LIBOMPTARGET_NVPTX_ARCH-NOTFOUND
+			)
+		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 e856c6c91090..3ea3d9e36836 100644
--- a/sys-libs/llvm-libunwind/Manifest
+++ b/sys-libs/llvm-libunwind/Manifest
@@ -7,12 +7,15 @@ 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-18.1.3.src.tar.xz 132049300 BLAKE2B 0681177cfe6a65f5cf11942381078388e8f5d9d5a4bb50b040e4c10a3898e7311ff379fcca008e82e4bef225792a38eb77f722c972725b9251a0fda29d8d7ecc SHA512 b8b8a00c560bc7d4c4b5d533b92dbd52f2c0254f0acf687e787e8b7fa780cd5d96f6e9709356d2c406c0b36b186dee4de6b1bc1928a97de0bda863fa873e0783
 DIST llvm-project-18.1.3.src.tar.xz.sig 566 BLAKE2B dcecf41346cc864c6e5bedd3a7db3db4f32a68534364d2537a15ca7e4e2f2d35a22722385ac556d2a4ac48ab37567566094f223534e696299f98040e702146d0 SHA512 b7e50779841891e9ed9de5ed917c5be3209a52a5d98c67a032509ae8fad8a2a882bf619c66d2ee45bb53dfb03d750cb94dc4b2750ec2a8edb0465700d5bc657c
+DIST llvm-project-18.1.4.src.tar.xz 132054668 BLAKE2B 94bbad3b185fd07cbace4eff79aba80fbdd5e072739250e3927fe1848bcf3f8d355eb1f384e57306707eb702acc7ab01b732590735be7950221607664d04b0a6 SHA512 b1b214ae91f3705d8ea345547ad53f1e5d7d884c1eb6958bc41c14ac4b3e407771ccc2b693686ff103c8232c2c3942731d6db9a9cb4f735e6c6a0674739d0b29
+DIST llvm-project-18.1.4.src.tar.xz.sig 566 BLAKE2B b74fd219d7bcdf197b4e711cfbb25c40e9d8d2c7341de0215d8c31f330f396e9c166ff63513829cdc9cef349f08238f66a4dc949fa97958a7af496abae369eaa SHA512 4f456edf4fb454815acaef6855b1a0991f229810a32e9369af83388e37f0ef8964308e1e93bd6216024cdd67e86caaadc8d5794467857cc6fe561c9fa6ca7386
 DIST llvm-project-a8b0ecd2605ff23f495a8af64e06c35f86834e54.tar.gz 208451583 BLAKE2B 3f8557637b9d10ed924cfec0b3e83d85996417df24b317cac55740aa199ef97cf7560fe634debd1dbfc7c9fc25aa2b2643fccaecc4c866481dc57b11eba1d02f SHA512 1f4bf5a8a59582af426ad13cc828e1e482c5c831ed5a4bb0da419ed3cf67e5e485fd36074603ad22328e35be44b8ccd2d92d1382bc7a228fdf38d458a2321e07
 DIST llvm-project-ee284d2da0720dc21191d6f545504cbfcf5dcbcf.tar.gz 208883034 BLAKE2B e37c9f1a6a4d0caa9a3091f979dd09f509d458f8b7b30286c77dd2385aea748b7aac6dd488c79573f82feb655aa321717bd2fb46bba4a12b388b52064f6e13bf SHA512 1335ade87cd2accc47ac47ed2ab302999e375808b158b6c9d31fac9059cbb992d2bdaaadf1fd9a1b37268c1123d43346ea4d150894d6d2e6f80ba790b65b93b1
 EBUILD llvm-libunwind-15.0.7.ebuild 3032 BLAKE2B 9b47e894db1a764f3eca3135f4caba68261953f4433af017b7bb53181e345ad26c570733f997022c53c9ef49a0a3b823188d92cfcc16a2113825d767b1ffab2a SHA512 0b68480fb2a8e5a351574e81fbcff824cd324754ed40378f06fec12fedbba94a921043d72db6ecc37f8b0680b7f518bbbd8d63f69ce8d84f86ca522653d293fb
 EBUILD llvm-libunwind-16.0.6-r1.ebuild 3440 BLAKE2B eafe21a3de172043ca0039ba27c80c64d32b02cc86bdb5a6d108ded35770e0352216337cbf24ee4fde43b699a68a85c8145be2d17510d525452bfd5a02674998 SHA512 164fdc1c62405e02c035af7997b8522b51f5b9337d2bb66d7fc9b1f45df74ec70d31b26dc5324c59792d32c543fe18abf74ed3b07a64c131e3c1bb4f9f733c5d
 EBUILD llvm-libunwind-17.0.6.ebuild 3440 BLAKE2B eafe21a3de172043ca0039ba27c80c64d32b02cc86bdb5a6d108ded35770e0352216337cbf24ee4fde43b699a68a85c8145be2d17510d525452bfd5a02674998 SHA512 164fdc1c62405e02c035af7997b8522b51f5b9337d2bb66d7fc9b1f45df74ec70d31b26dc5324c59792d32c543fe18abf74ed3b07a64c131e3c1bb4f9f733c5d
 EBUILD llvm-libunwind-18.1.3.ebuild 3407 BLAKE2B 6c48a4e9caebd60890460e91e7e64324d66a97813023d582c869b0060468576de1b307160c435587f013ad632335a9968d61731ee4157c5d2272d817ee74a309 SHA512 919fda22d1de77a0db1c6fa14eeee7b6d7444af767e849aacdf952e9b66732c0ac06ae14a6dca2176a59df9738223e11ee8035d3c99bf0ea13799699fadb7d68
+EBUILD llvm-libunwind-18.1.4.ebuild 3407 BLAKE2B 6c48a4e9caebd60890460e91e7e64324d66a97813023d582c869b0060468576de1b307160c435587f013ad632335a9968d61731ee4157c5d2272d817ee74a309 SHA512 919fda22d1de77a0db1c6fa14eeee7b6d7444af767e849aacdf952e9b66732c0ac06ae14a6dca2176a59df9738223e11ee8035d3c99bf0ea13799699fadb7d68
 EBUILD llvm-libunwind-19.0.0.9999.ebuild 3316 BLAKE2B 013ff60e8fa1fa480e1e56c6c8c1d5a657d946264a279a8fad53e3047fcde1f439e10b25e151af0d9c3f7f6fe014c2cf3372d311f3963c78e633e986b28a33e5 SHA512 4aaa97553c0e3e5421fe5864b81fdcd0e8a1167e37bec37e8706d3b9b939b5220a171576f800bdc6ae25f2bbfd60b063c84934d1daa0bdfd6989a80d08044301
 EBUILD llvm-libunwind-19.0.0_pre20240330.ebuild 3316 BLAKE2B 013ff60e8fa1fa480e1e56c6c8c1d5a657d946264a279a8fad53e3047fcde1f439e10b25e151af0d9c3f7f6fe014c2cf3372d311f3963c78e633e986b28a33e5 SHA512 4aaa97553c0e3e5421fe5864b81fdcd0e8a1167e37bec37e8706d3b9b939b5220a171576f800bdc6ae25f2bbfd60b063c84934d1daa0bdfd6989a80d08044301
 EBUILD llvm-libunwind-19.0.0_pre20240404.ebuild 3316 BLAKE2B 013ff60e8fa1fa480e1e56c6c8c1d5a657d946264a279a8fad53e3047fcde1f439e10b25e151af0d9c3f7f6fe014c2cf3372d311f3963c78e633e986b28a33e5 SHA512 4aaa97553c0e3e5421fe5864b81fdcd0e8a1167e37bec37e8706d3b9b939b5220a171576f800bdc6ae25f2bbfd60b063c84934d1daa0bdfd6989a80d08044301
diff --git a/sys-libs/llvm-libunwind/llvm-libunwind-18.1.4.ebuild b/sys-libs/llvm-libunwind/llvm-libunwind-18.1.4.ebuild
new file mode 100644
index 000000000000..944fc4144f4e
--- /dev/null
+++ b/sys-libs/llvm-libunwind/llvm-libunwind-18.1.4.ebuild
@@ -0,0 +1,129 @@
+# Copyright 1999-2024 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.org llvm-utils python-any-r1
+inherit 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"
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~sparc ~x86 ~arm64-macos ~x64-macos"
+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[${PYTHON_USEDEP}]"
+}
+
+multilib_src_configure() {
+	llvm_prepend_path "${LLVM_MAJOR}"
+
+	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
+}