15 files changed, 934 insertions, 2 deletions
diff --git a/sys-libs/Manifest.gz b/sys-libs/Manifest.gz
index 13b9f73821af..021aec5c940b 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 ebaedaee21ff..7ea3715a03c4 100644
--- a/sys-libs/compiler-rt-sanitizers/Manifest
+++ b/sys-libs/compiler-rt-sanitizers/Manifest
@@ -14,6 +14,7 @@ DIST llvm-project-19.1.0-rc1.src.tar.xz 141259912 BLAKE2B e882ff54a96900b4948e57
 DIST llvm-project-19.1.0-rc1.src.tar.xz.sig 438 BLAKE2B cc1acbd33440bb14f78c19cc3061a5c0cb3d9dbcd6f0d1516fe118ac02c500ba4df129f870ddf3fe1a52519feab4b631866413fce9c726272d52c3865a9eea27 SHA512 a3361992b55be13aeff5d91bb90a15e3a2ab89e486328fa4d9abc9efa3925aee70bea48449b003ae1926909d389bf71afcf6dc56d800ed2e0e3dbc65da6e4e92
 DIST llvm-project-19.1.0-rc2.src.tar.xz 141264388 BLAKE2B 690b4912d9e4a8019b7990934dd6486362337ccb303dca119c0e75aa1063ad452222be1ee965e43b160dfcea20e491a20c289344152666b618712a1d76dc4780 SHA512 508a401e8433b1ac9a399246eb1a3c18faed7c3d41d8c118e77cefbb64cc6d6e171bd41a3e5584f6c84df141ba6819f1a1cce75b5c1ef33e3d2ac239e662d07c
 DIST llvm-project-19.1.0-rc2.src.tar.xz.sig 438 BLAKE2B 1eaf10a1419ecf009c033a8f6ecb6eec86107d81621d5b4665c8d929b05f4845ce0c432017343d7b06f33e6ff6384df9e1d8fc7b9c6efe7f10ef69798891b7e5 SHA512 b46e9a1d40f891c5f3544d8cc6295900bff5dda9a4a526b8db55a42a37ae90deb216b316d2117984e82f4e918d15343e75b3b9e6d6c773866707c3398e032826
+DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 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
@@ -22,4 +23,5 @@ EBUILD compiler-rt-sanitizers-19.1.0_rc1.ebuild 6390 BLAKE2B d66db01b70fb7e5a27f
 EBUILD compiler-rt-sanitizers-19.1.0_rc2.ebuild 6366 BLAKE2B 4e6459ee51444413b05b661deedbe0f3543f71f6e05349a3a7f4a6352897ee7ea8a62a8ec4a26c5c31a4ba21e68b045b3e37d9e2530ad51519a9f7d2a455342c SHA512 c7ec9377a079c30b3460a7201482b5183ab35755824a7d1c81d90dc2c519a6e2410c0f51fdb4719b8239ee841c162b20ad1cf191068a27a8f13664cad4aa1ca9
 EBUILD compiler-rt-sanitizers-20.0.0.9999.ebuild 6366 BLAKE2B 4e6459ee51444413b05b661deedbe0f3543f71f6e05349a3a7f4a6352897ee7ea8a62a8ec4a26c5c31a4ba21e68b045b3e37d9e2530ad51519a9f7d2a455342c SHA512 c7ec9377a079c30b3460a7201482b5183ab35755824a7d1c81d90dc2c519a6e2410c0f51fdb4719b8239ee841c162b20ad1cf191068a27a8f13664cad4aa1ca9
 EBUILD compiler-rt-sanitizers-20.0.0_pre20240801.ebuild 6529 BLAKE2B 9f656e7b7c7fbffd0372235a2330601746669a42c38f931e88eb7db1c5d48132a9b26a64e375e4c87f193c7a1fe3e332d7edc1417eb933dc32611965c5497325 SHA512 ceef4bd21ef3a943321dc6b617d61ee2f4f1ccd8cf56522a5f3cfb0e1a9a067d3defa70901327e1c41096d7026be29af480bb0942da35f5bb1bc32297ed20b56
+EBUILD compiler-rt-sanitizers-20.0.0_pre20240808.ebuild 6366 BLAKE2B 4e6459ee51444413b05b661deedbe0f3543f71f6e05349a3a7f4a6352897ee7ea8a62a8ec4a26c5c31a4ba21e68b045b3e37d9e2530ad51519a9f7d2a455342c SHA512 c7ec9377a079c30b3460a7201482b5183ab35755824a7d1c81d90dc2c519a6e2410c0f51fdb4719b8239ee841c162b20ad1cf191068a27a8f13664cad4aa1ca9
 MISC metadata.xml 1475 BLAKE2B f7ea99e3103e42a2c79fe6c86ad174297e56bcffa7b164ac3ab0a239ba5adf2265b7fc458ce8b22c9c3bd647bb03d674abf842443cb32bf8d88c683746650a19 SHA512 8e52479d3b040718a3fdaa811030bc45ef33ce74daae3e365281074cdf6d586ba11ae5f14d87dbb456f00fe4b9ae6057f3bf30eb0973cc16cbdcc3eba01ff9f8
diff --git a/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-20.0.0_pre20240808.ebuild b/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-20.0.0_pre20240808.ebuild
new file mode 100644
index 000000000000..d395b7fd5a11
--- /dev/null
+++ b/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-20.0.0_pre20240808.ebuild
@@ -0,0 +1,220 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..13} )
+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}"
+IUSE="+abi_x86_32 abi_x86_64 +clang +debug test"
+# base targets
+IUSE+=" +ctx-profile +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? (
+		${PYTHON_DEPS}
+	)
+"
+
+LLVM_COMPONENTS=( compiler-rt cmake llvm/cmake )
+LLVM_TEST_COMPONENTS=(
+	llvm/include/llvm/ProfileData llvm/lib/Testing/Support third-party
+)
+llvm.org_set_globals
+
+python_check_deps() {
+	use test || return 0
+	python_has_version ">=dev-python/lit-15[${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_CTX_PROFILE=$(usex ctx-profile)
+		-DCOMPILER_RT_BUILD_LIBFUZZER=$(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 33de550add82..f69b959f8635 100644
--- a/sys-libs/compiler-rt/Manifest
+++ b/sys-libs/compiler-rt/Manifest
@@ -14,6 +14,7 @@ DIST llvm-project-19.1.0-rc1.src.tar.xz 141259912 BLAKE2B e882ff54a96900b4948e57
 DIST llvm-project-19.1.0-rc1.src.tar.xz.sig 438 BLAKE2B cc1acbd33440bb14f78c19cc3061a5c0cb3d9dbcd6f0d1516fe118ac02c500ba4df129f870ddf3fe1a52519feab4b631866413fce9c726272d52c3865a9eea27 SHA512 a3361992b55be13aeff5d91bb90a15e3a2ab89e486328fa4d9abc9efa3925aee70bea48449b003ae1926909d389bf71afcf6dc56d800ed2e0e3dbc65da6e4e92
 DIST llvm-project-19.1.0-rc2.src.tar.xz 141264388 BLAKE2B 690b4912d9e4a8019b7990934dd6486362337ccb303dca119c0e75aa1063ad452222be1ee965e43b160dfcea20e491a20c289344152666b618712a1d76dc4780 SHA512 508a401e8433b1ac9a399246eb1a3c18faed7c3d41d8c118e77cefbb64cc6d6e171bd41a3e5584f6c84df141ba6819f1a1cce75b5c1ef33e3d2ac239e662d07c
 DIST llvm-project-19.1.0-rc2.src.tar.xz.sig 438 BLAKE2B 1eaf10a1419ecf009c033a8f6ecb6eec86107d81621d5b4665c8d929b05f4845ce0c432017343d7b06f33e6ff6384df9e1d8fc7b9c6efe7f10ef69798891b7e5 SHA512 b46e9a1d40f891c5f3544d8cc6295900bff5dda9a4a526b8db55a42a37ae90deb216b316d2117984e82f4e918d15343e75b3b9e6d6c773866707c3398e032826
+DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 EBUILD compiler-rt-15.0.7.ebuild 4238 BLAKE2B 22d56dbe24c92400bf58942390b06af70fddba89d8fecc9b85162dd7a41c6ee592eaaf883f5ad483f65f74fabccc28f94528688410ee36e2d5279efcc6066de0 SHA512 ca49d23def580d4dcfc4058768eeb9deb6e59ea44575da272d1c142fffe0bf4e3d3c7c9fa6182ab348a3aab11879af116a549cb1a3a03b27b4bf4151cf892aaa
 EBUILD compiler-rt-16.0.6-r4.ebuild 5222 BLAKE2B 169966029e8632266ab1f1ace407d846e58386044da218fa343e9fb4ac3b3e2703cf42d3d6361bbb2abffbe5ebc0508c2064cbef7f93c66771aec96dbcda71c6 SHA512 ff5c52e2483e6c5ce1c370905700a5d0e458597b503cb9201724712cf3280a51e0af8ac2ff68bb9a30cd4481a76d0dbdae4d5e52b2f9318a9b4586f11fe4f188
 EBUILD compiler-rt-16.0.6.ebuild 5198 BLAKE2B 2fe2310703d44d330d97b1fa1b407d99898070604037be31ca762fe65043e1d3d1e046298dc74f3d0cbb3493f985661e362b217170cbe1bf74a47dddfe8987ca SHA512 cc9aabc22f689bfc677ceb74793441674aeca2586a28ff96b812af4822d1b8b5a4147484e41f0bf95ae995488d3e8ee77684fd684b9dab8ade4f1fa57e80c709
@@ -23,4 +24,5 @@ EBUILD compiler-rt-19.1.0_rc1.ebuild 4963 BLAKE2B dc2eab2b95233dc791544f2cfcedf6
 EBUILD compiler-rt-19.1.0_rc2.ebuild 4963 BLAKE2B dc2eab2b95233dc791544f2cfcedf6f812ccfde2f31ce14525f60fa4d4df91ca2f93ab702156c0acdbb07fd03face456a521b7e92572b7997a2358a6e1290c95 SHA512 a0299d32d9e7539ec36740899b697f6afa69ca91528fdebe35ffa39c592a6dace90b080cca233a65ce932d17ce76292e7920fa569a3aa3e37424c9f0112c9b2f
 EBUILD compiler-rt-20.0.0.9999.ebuild 4963 BLAKE2B dc2eab2b95233dc791544f2cfcedf6f812ccfde2f31ce14525f60fa4d4df91ca2f93ab702156c0acdbb07fd03face456a521b7e92572b7997a2358a6e1290c95 SHA512 a0299d32d9e7539ec36740899b697f6afa69ca91528fdebe35ffa39c592a6dace90b080cca233a65ce932d17ce76292e7920fa569a3aa3e37424c9f0112c9b2f
 EBUILD compiler-rt-20.0.0_pre20240801.ebuild 4963 BLAKE2B dc2eab2b95233dc791544f2cfcedf6f812ccfde2f31ce14525f60fa4d4df91ca2f93ab702156c0acdbb07fd03face456a521b7e92572b7997a2358a6e1290c95 SHA512 a0299d32d9e7539ec36740899b697f6afa69ca91528fdebe35ffa39c592a6dace90b080cca233a65ce932d17ce76292e7920fa569a3aa3e37424c9f0112c9b2f
+EBUILD compiler-rt-20.0.0_pre20240808.ebuild 4963 BLAKE2B dc2eab2b95233dc791544f2cfcedf6f812ccfde2f31ce14525f60fa4d4df91ca2f93ab702156c0acdbb07fd03face456a521b7e92572b7997a2358a6e1290c95 SHA512 a0299d32d9e7539ec36740899b697f6afa69ca91528fdebe35ffa39c592a6dace90b080cca233a65ce932d17ce76292e7920fa569a3aa3e37424c9f0112c9b2f
 MISC metadata.xml 416 BLAKE2B 79a58249c94b605ba57f346c4e05b43853cf6cfb8bb65a4f4e3c44039cccfdb83dd31bfaaaf398bcbdc393efabdfc7ed186fe775976c46227e74decf2c8f4fb2 SHA512 ce30c79a575e5933effb1fec36f9a4ef02d9f97f312feb39c55a88cbda9a1bae1d7af2ec4ad5f66212cbb2cdbfb26f1a436689f16f410153c9d65eb010264c48
diff --git a/sys-libs/compiler-rt/compiler-rt-20.0.0_pre20240808.ebuild b/sys-libs/compiler-rt/compiler-rt-20.0.0_pre20240808.ebuild
new file mode 100644
index 000000000000..ca99f4442636
--- /dev/null
+++ b/sys-libs/compiler-rt/compiler-rt-20.0.0_pre20240808.ebuild
@@ -0,0 +1,173 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..13} )
+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}"
+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? (
+		${PYTHON_DEPS}
+	)
+"
+
+LLVM_COMPONENTS=( compiler-rt cmake llvm/cmake )
+LLVM_TEST_COMPONENTS=( llvm/include/llvm/TargetParser )
+llvm.org_set_globals
+
+python_check_deps() {
+	use test || return 0
+	python_has_version ">=dev-python/lit-15[${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 -e main )
+
+			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_CTX_PROFILE=OFF
+		-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/kpmcore/Manifest b/sys-libs/kpmcore/Manifest
index 067efc5ba503..74f6bd8eb052 100644
--- a/sys-libs/kpmcore/Manifest
+++ b/sys-libs/kpmcore/Manifest
@@ -1,5 +1,5 @@
 DIST kpmcore-23.08.5.tar.xz 630396 BLAKE2B f5a470c9b54663b9f52467519046646de9ea20b83c8afaf199e3877ecc3f9de47139c9d44e8b23a2d49bfb00ae624b9117cf1adf83092f141a8e46d02adfaf8f SHA512 30ddbe62412df5645e034b745159b7c8db7801340225653d05856032083181d482379415a56d4e6f703c4f6c4a1a79c252a3b549beba227ab70dfc673cc59acd
 DIST kpmcore-24.05.2.tar.xz 638036 BLAKE2B cc75d61d38a12f5fae2b2f20d6594c8609031309484c6b6c871d7eb56cad16abccfe304412e3d7af5a7707a9422f62500726389cacf34a529373c72dc35ad9c4 SHA512 b3da86b2876701276d951de44e29b2e52645650d87efd9be34a98d3e45c606d209326f46c97c1fbc60719de400a5b42b50970fd502ed4acf3db923dab6429d37
 EBUILD kpmcore-23.08.5.ebuild 743 BLAKE2B 070cbc8ee445446ad57504f930d233b85eccb15f580985c643f2dd8ee2a58cab1701b5263e5a5c0474c178e376643a1c85e1b604661b85db187b59946eb01473 SHA512 15b1af85381a3664f5d9090566e98cc367b59652d4c388408a74668cedb95c3e0891154be2b7007c28abe9b54af9d63979e0ae9defe2a3e77ebed5a88a0beb1c
-EBUILD kpmcore-24.05.2.ebuild 681 BLAKE2B 19a9d8daf692f45df0b2868bd5a851c357bd88385c7104f16322f2bfa0e6d6e91f4424005bad28b731d769f6019d218618b08b837c62e3afa1712d61093cc138 SHA512 2494a5ad173a05f99296d8dfb5924d5ff5e1bafe323e5b3ba67b0da4ed6cf44141df0b800155fb030606c6a7dfb45f7933f5aa57c393b9c687e1bcd8eb2a082c
+EBUILD kpmcore-24.05.2.ebuild 688 BLAKE2B b649390334bbed83d65bcd26b6bd810bd939cbe2969eedc253fbf701206f9167bc98ecb3d1f83c821aa0d6a4cfc3fdcd5f2677cd25f7c9e704ef320dad09f3b6 SHA512 7d66eb5bcfcfe6f045ae5ce4ef18e1b14db2292670da90b058667d1cc59cb1533ab9620e8130fa19b410630dbdf770d8b03632edcefd0f0a2897db9f2abd2fcc
 MISC metadata.xml 318 BLAKE2B 922a5e32e706b2976c5f359a14194d268d3f499398576c80ce5fad8c0fcea0fbf048de4480a80a6a1889c88b8b6c14147654a3ab4d5ffbcc258c2290da63f6d1 SHA512 614cb8dda7ad2088e5d6ef39b449bb4be0ac72cd0231c320188d76d1816dce6490c5114bb4798112c4b11d99d30a9e82ff8fcf08ffa8c049589682a5e38208f6
diff --git a/sys-libs/kpmcore/kpmcore-24.05.2.ebuild b/sys-libs/kpmcore/kpmcore-24.05.2.ebuild
index b71af6e164c1..67d3ebc3e321 100644
--- a/sys-libs/kpmcore/kpmcore-24.05.2.ebuild
+++ b/sys-libs/kpmcore/kpmcore-24.05.2.ebuild
@@ -13,7 +13,7 @@ HOMEPAGE="https://apps.kde.org/partitionmanager/"
 
 LICENSE="GPL-3"
 SLOT="6/10"
-KEYWORDS="~amd64 ~arm64 ~x86"
+KEYWORDS="~amd64 ~arm64 ~ppc64 ~x86"
 
 # bug 689468, tests need polkit etc.
 RESTRICT="test"
diff --git a/sys-libs/libcxx/Manifest b/sys-libs/libcxx/Manifest
index db08569767cc..d233336c7d1f 100644
--- a/sys-libs/libcxx/Manifest
+++ b/sys-libs/libcxx/Manifest
@@ -13,6 +13,7 @@ DIST llvm-project-19.1.0-rc1.src.tar.xz 141259912 BLAKE2B e882ff54a96900b4948e57
 DIST llvm-project-19.1.0-rc1.src.tar.xz.sig 438 BLAKE2B cc1acbd33440bb14f78c19cc3061a5c0cb3d9dbcd6f0d1516fe118ac02c500ba4df129f870ddf3fe1a52519feab4b631866413fce9c726272d52c3865a9eea27 SHA512 a3361992b55be13aeff5d91bb90a15e3a2ab89e486328fa4d9abc9efa3925aee70bea48449b003ae1926909d389bf71afcf6dc56d800ed2e0e3dbc65da6e4e92
 DIST llvm-project-19.1.0-rc2.src.tar.xz 141264388 BLAKE2B 690b4912d9e4a8019b7990934dd6486362337ccb303dca119c0e75aa1063ad452222be1ee965e43b160dfcea20e491a20c289344152666b618712a1d76dc4780 SHA512 508a401e8433b1ac9a399246eb1a3c18faed7c3d41d8c118e77cefbb64cc6d6e171bd41a3e5584f6c84df141ba6819f1a1cce75b5c1ef33e3d2ac239e662d07c
 DIST llvm-project-19.1.0-rc2.src.tar.xz.sig 438 BLAKE2B 1eaf10a1419ecf009c033a8f6ecb6eec86107d81621d5b4665c8d929b05f4845ce0c432017343d7b06f33e6ff6384df9e1d8fc7b9c6efe7f10ef69798891b7e5 SHA512 b46e9a1d40f891c5f3544d8cc6295900bff5dda9a4a526b8db55a42a37ae90deb216b316d2117984e82f4e918d15343e75b3b9e6d6c773866707c3398e032826
+DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 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
@@ -21,4 +22,5 @@ EBUILD libcxx-19.1.0_rc1.ebuild 5101 BLAKE2B 4fb27fae1b4b3230de9b645416cba17ceb5
 EBUILD libcxx-19.1.0_rc2.ebuild 5101 BLAKE2B 4fb27fae1b4b3230de9b645416cba17ceb584260faf4c640d743b482cf333116ee00138ce206a62fbdb2811cd6e59dba2d8463949a17545a74f50837c274f355 SHA512 b88b738fad3d0f2aba6736ef9361250165a25a9f6011c8a8f61f035475d84f7bc8d9f3da95ab549d3eebeee338301dd734eed3c85365015134765ef003daa341
 EBUILD libcxx-20.0.0.9999.ebuild 5101 BLAKE2B 4fb27fae1b4b3230de9b645416cba17ceb584260faf4c640d743b482cf333116ee00138ce206a62fbdb2811cd6e59dba2d8463949a17545a74f50837c274f355 SHA512 b88b738fad3d0f2aba6736ef9361250165a25a9f6011c8a8f61f035475d84f7bc8d9f3da95ab549d3eebeee338301dd734eed3c85365015134765ef003daa341
 EBUILD libcxx-20.0.0_pre20240801.ebuild 5101 BLAKE2B 4fb27fae1b4b3230de9b645416cba17ceb584260faf4c640d743b482cf333116ee00138ce206a62fbdb2811cd6e59dba2d8463949a17545a74f50837c274f355 SHA512 b88b738fad3d0f2aba6736ef9361250165a25a9f6011c8a8f61f035475d84f7bc8d9f3da95ab549d3eebeee338301dd734eed3c85365015134765ef003daa341
+EBUILD libcxx-20.0.0_pre20240808.ebuild 5101 BLAKE2B 4fb27fae1b4b3230de9b645416cba17ceb584260faf4c640d743b482cf333116ee00138ce206a62fbdb2811cd6e59dba2d8463949a17545a74f50837c274f355 SHA512 b88b738fad3d0f2aba6736ef9361250165a25a9f6011c8a8f61f035475d84f7bc8d9f3da95ab549d3eebeee338301dd734eed3c85365015134765ef003daa341
 MISC metadata.xml 598 BLAKE2B b7a60449e0d8e4e7605ec203dfaa45b17a265b024e21a3bcfe05a3aeb6c3d19a1d2a218cb1f9ac9ed52296f0d6e723fed251f364341fb70cbd91b747962db580 SHA512 a23f912efff52c4687767023da826ace8c6e5dcd5e69ece86aabbea99da89e48ba81cdc292f03193e2e8a05743e62ebf4d4735d038e0cc4b42714fa277569335
diff --git a/sys-libs/libcxx/libcxx-20.0.0_pre20240808.ebuild b/sys-libs/libcxx/libcxx-20.0.0_pre20240808.ebuild
new file mode 100644
index 000000000000..a0d07e1507f4
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-20.0.0_pre20240808.ebuild
@@ -0,0 +1,201 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..13} )
+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"
+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
+}
+
+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_INSTALL_MODULES=ON
+		-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 29f8049ad427..2041eed9c213 100644
--- a/sys-libs/libcxxabi/Manifest
+++ b/sys-libs/libcxxabi/Manifest
@@ -11,6 +11,7 @@ DIST llvm-project-19.1.0-rc1.src.tar.xz 141259912 BLAKE2B e882ff54a96900b4948e57
 DIST llvm-project-19.1.0-rc1.src.tar.xz.sig 438 BLAKE2B cc1acbd33440bb14f78c19cc3061a5c0cb3d9dbcd6f0d1516fe118ac02c500ba4df129f870ddf3fe1a52519feab4b631866413fce9c726272d52c3865a9eea27 SHA512 a3361992b55be13aeff5d91bb90a15e3a2ab89e486328fa4d9abc9efa3925aee70bea48449b003ae1926909d389bf71afcf6dc56d800ed2e0e3dbc65da6e4e92
 DIST llvm-project-19.1.0-rc2.src.tar.xz 141264388 BLAKE2B 690b4912d9e4a8019b7990934dd6486362337ccb303dca119c0e75aa1063ad452222be1ee965e43b160dfcea20e491a20c289344152666b618712a1d76dc4780 SHA512 508a401e8433b1ac9a399246eb1a3c18faed7c3d41d8c118e77cefbb64cc6d6e171bd41a3e5584f6c84df141ba6819f1a1cce75b5c1ef33e3d2ac239e662d07c
 DIST llvm-project-19.1.0-rc2.src.tar.xz.sig 438 BLAKE2B 1eaf10a1419ecf009c033a8f6ecb6eec86107d81621d5b4665c8d929b05f4845ce0c432017343d7b06f33e6ff6384df9e1d8fc7b9c6efe7f10ef69798891b7e5 SHA512 b46e9a1d40f891c5f3544d8cc6295900bff5dda9a4a526b8db55a42a37ae90deb216b316d2117984e82f4e918d15343e75b3b9e6d6c773866707c3398e032826
+DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 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
@@ -19,4 +20,5 @@ EBUILD libcxxabi-19.1.0_rc1.ebuild 2684 BLAKE2B db3cdfc7962bc9b9a40f6783b813bb64
 EBUILD libcxxabi-19.1.0_rc2.ebuild 2684 BLAKE2B db3cdfc7962bc9b9a40f6783b813bb64a26a2d9cff7bcab99fb2b8ff6221789a8799c077837492280b543cd32bf6853638e0a9b3f07b36d0f9683e7b41601c8b SHA512 b0eb6cbd9ff0ccb5f08fefeb7c00e2eb08574137a0f38b52e4df9ea462b2c1c521d4fa8628f407bcbb26aedb77406b4eabbe1ef9c7939fed2b9be5fc0ce1ca34
 EBUILD libcxxabi-20.0.0.9999.ebuild 2684 BLAKE2B db3cdfc7962bc9b9a40f6783b813bb64a26a2d9cff7bcab99fb2b8ff6221789a8799c077837492280b543cd32bf6853638e0a9b3f07b36d0f9683e7b41601c8b SHA512 b0eb6cbd9ff0ccb5f08fefeb7c00e2eb08574137a0f38b52e4df9ea462b2c1c521d4fa8628f407bcbb26aedb77406b4eabbe1ef9c7939fed2b9be5fc0ce1ca34
 EBUILD libcxxabi-20.0.0_pre20240801.ebuild 2684 BLAKE2B db3cdfc7962bc9b9a40f6783b813bb64a26a2d9cff7bcab99fb2b8ff6221789a8799c077837492280b543cd32bf6853638e0a9b3f07b36d0f9683e7b41601c8b SHA512 b0eb6cbd9ff0ccb5f08fefeb7c00e2eb08574137a0f38b52e4df9ea462b2c1c521d4fa8628f407bcbb26aedb77406b4eabbe1ef9c7939fed2b9be5fc0ce1ca34
+EBUILD libcxxabi-20.0.0_pre20240808.ebuild 2684 BLAKE2B db3cdfc7962bc9b9a40f6783b813bb64a26a2d9cff7bcab99fb2b8ff6221789a8799c077837492280b543cd32bf6853638e0a9b3f07b36d0f9683e7b41601c8b SHA512 b0eb6cbd9ff0ccb5f08fefeb7c00e2eb08574137a0f38b52e4df9ea462b2c1c521d4fa8628f407bcbb26aedb77406b4eabbe1ef9c7939fed2b9be5fc0ce1ca34
 MISC metadata.xml 438 BLAKE2B 0a830a06a53a6cdaf138ad7620fe366fae05c1c1451267d6a58caf7da5ce8f5a26d302fab53b9460920074ab5a65991d3bd24fde087809e8dc12188dd94c7676 SHA512 d53e13c497569636fb453a159c5ca5ddfabf8e5debd5f92e5149c52d54c876753842ab73293d6d08e2d9b279363b4f0c743eed3a5027a61246c6b60496be8e87
diff --git a/sys-libs/libcxxabi/libcxxabi-20.0.0_pre20240808.ebuild b/sys-libs/libcxxabi/libcxxabi-20.0.0_pre20240808.ebuild
new file mode 100644
index 000000000000..903f8e866cb6
--- /dev/null
+++ b/sys-libs/libcxxabi/libcxxabi-20.0.0_pre20240808.ebuild
@@ -0,0 +1,110 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..13} )
+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"
+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 2f428e16f59a..658212ca15d5 100644
--- a/sys-libs/libomp/Manifest
+++ b/sys-libs/libomp/Manifest
@@ -12,6 +12,7 @@ DIST llvm-project-19.1.0-rc1.src.tar.xz 141259912 BLAKE2B e882ff54a96900b4948e57
 DIST llvm-project-19.1.0-rc1.src.tar.xz.sig 438 BLAKE2B cc1acbd33440bb14f78c19cc3061a5c0cb3d9dbcd6f0d1516fe118ac02c500ba4df129f870ddf3fe1a52519feab4b631866413fce9c726272d52c3865a9eea27 SHA512 a3361992b55be13aeff5d91bb90a15e3a2ab89e486328fa4d9abc9efa3925aee70bea48449b003ae1926909d389bf71afcf6dc56d800ed2e0e3dbc65da6e4e92
 DIST llvm-project-19.1.0-rc2.src.tar.xz 141264388 BLAKE2B 690b4912d9e4a8019b7990934dd6486362337ccb303dca119c0e75aa1063ad452222be1ee965e43b160dfcea20e491a20c289344152666b618712a1d76dc4780 SHA512 508a401e8433b1ac9a399246eb1a3c18faed7c3d41d8c118e77cefbb64cc6d6e171bd41a3e5584f6c84df141ba6819f1a1cce75b5c1ef33e3d2ac239e662d07c
 DIST llvm-project-19.1.0-rc2.src.tar.xz.sig 438 BLAKE2B 1eaf10a1419ecf009c033a8f6ecb6eec86107d81621d5b4665c8d929b05f4845ce0c432017343d7b06f33e6ff6384df9e1d8fc7b9c6efe7f10ef69798891b7e5 SHA512 b46e9a1d40f891c5f3544d8cc6295900bff5dda9a4a526b8db55a42a37ae90deb216b316d2117984e82f4e918d15343e75b3b9e6d6c773866707c3398e032826
+DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 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 4052 BLAKE2B 8a05a46719120eac5495417fb6ea54b7a6a3d93aa7cc0917ca9e8f3cb2238f23348ecaefebd4c2064eac4adfbd4ef7f86b70c051cbcc009692ec790159d8883d SHA512 80b48f5a3af351ee14296aa76ba28b964eb85d84a1827af8acd35076895342a5dd743362c988e042c57f11dc9e8bbca1a9003a6752562758249062e460c73247
@@ -20,4 +21,5 @@ EBUILD libomp-19.1.0_rc1.ebuild 2163 BLAKE2B 522f4f9099cf7ca69f3bd2d93f1bfa0f80f
 EBUILD libomp-19.1.0_rc2.ebuild 2163 BLAKE2B 522f4f9099cf7ca69f3bd2d93f1bfa0f80fd1937d8147b0464d3bcb143b161cf5b17b8e2fc80a981188a1962a3dc1396979dd726028f546ccb10b56265405415 SHA512 5ae5744e3addc95f790c15e1d89d3da4080ea0216518ece8097ac21a71432892d920722618ea3589f7bf4f70c505b5be37fa9b8c49683fd2307988b4425e7bea
 EBUILD libomp-20.0.0.9999.ebuild 2163 BLAKE2B 522f4f9099cf7ca69f3bd2d93f1bfa0f80fd1937d8147b0464d3bcb143b161cf5b17b8e2fc80a981188a1962a3dc1396979dd726028f546ccb10b56265405415 SHA512 5ae5744e3addc95f790c15e1d89d3da4080ea0216518ece8097ac21a71432892d920722618ea3589f7bf4f70c505b5be37fa9b8c49683fd2307988b4425e7bea
 EBUILD libomp-20.0.0_pre20240801.ebuild 2163 BLAKE2B 522f4f9099cf7ca69f3bd2d93f1bfa0f80fd1937d8147b0464d3bcb143b161cf5b17b8e2fc80a981188a1962a3dc1396979dd726028f546ccb10b56265405415 SHA512 5ae5744e3addc95f790c15e1d89d3da4080ea0216518ece8097ac21a71432892d920722618ea3589f7bf4f70c505b5be37fa9b8c49683fd2307988b4425e7bea
+EBUILD libomp-20.0.0_pre20240808.ebuild 2163 BLAKE2B 522f4f9099cf7ca69f3bd2d93f1bfa0f80fd1937d8147b0464d3bcb143b161cf5b17b8e2fc80a981188a1962a3dc1396979dd726028f546ccb10b56265405415 SHA512 5ae5744e3addc95f790c15e1d89d3da4080ea0216518ece8097ac21a71432892d920722618ea3589f7bf4f70c505b5be37fa9b8c49683fd2307988b4425e7bea
 MISC metadata.xml 883 BLAKE2B 127e896b82a49633a6866b33ca776ebe2dd149a5d04da4484a53186f219a85db0ab9d826bc1cc61d4df9fa54c9bcc546be070a0b28985174925fd947aa09cca2 SHA512 dc32cae01401feb93eede6506b3955c766ff19b44976fcc67277559b23ac151993377daeed9ba83b2dd71dbdeea330cd1208dcb0c9c5f56be270883b31f9b15f
diff --git a/sys-libs/libomp/libomp-20.0.0_pre20240808.ebuild b/sys-libs/libomp/libomp-20.0.0_pre20240808.ebuild
new file mode 100644
index 000000000000..32b91b3699c4
--- /dev/null
+++ b/sys-libs/libomp/libomp-20.0.0_pre20240808.ebuild
@@ -0,0 +1,88 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..13} )
+inherit flag-o-matic cmake-multilib linux-info llvm.org python-single-r1
+
+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 ompt test"
+REQUIRED_USE="
+	gdb-plugin? ( ${PYTHON_REQUIRED_USE} )
+"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	gdb-plugin? ( ${PYTHON_DEPS} )
+	hwloc? ( >=sys-apps/hwloc-2.5:0=[${MULTILIB_USEDEP}] )
+"
+# 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
+	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
+
+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="${CPPFLAGS} -DNDEBUG"
+
+	local libdir="$(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)
+
+		# do not install libgomp.so & libiomp5.so aliases
+		-DLIBOMP_INSTALL_ALIASES=OFF
+		# disable unnecessary hack copying stuff back to srcdir
+		-DLIBOMP_COPY_EXPORTS=OFF
+	)
+
+	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++")"
+	)
+	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 52fafc580413..18cc3e4414db 100644
--- a/sys-libs/llvm-libunwind/Manifest
+++ b/sys-libs/llvm-libunwind/Manifest
@@ -11,6 +11,7 @@ DIST llvm-project-19.1.0-rc1.src.tar.xz 141259912 BLAKE2B e882ff54a96900b4948e57
 DIST llvm-project-19.1.0-rc1.src.tar.xz.sig 438 BLAKE2B cc1acbd33440bb14f78c19cc3061a5c0cb3d9dbcd6f0d1516fe118ac02c500ba4df129f870ddf3fe1a52519feab4b631866413fce9c726272d52c3865a9eea27 SHA512 a3361992b55be13aeff5d91bb90a15e3a2ab89e486328fa4d9abc9efa3925aee70bea48449b003ae1926909d389bf71afcf6dc56d800ed2e0e3dbc65da6e4e92
 DIST llvm-project-19.1.0-rc2.src.tar.xz 141264388 BLAKE2B 690b4912d9e4a8019b7990934dd6486362337ccb303dca119c0e75aa1063ad452222be1ee965e43b160dfcea20e491a20c289344152666b618712a1d76dc4780 SHA512 508a401e8433b1ac9a399246eb1a3c18faed7c3d41d8c118e77cefbb64cc6d6e171bd41a3e5584f6c84df141ba6819f1a1cce75b5c1ef33e3d2ac239e662d07c
 DIST llvm-project-19.1.0-rc2.src.tar.xz.sig 438 BLAKE2B 1eaf10a1419ecf009c033a8f6ecb6eec86107d81621d5b4665c8d929b05f4845ce0c432017343d7b06f33e6ff6384df9e1d8fc7b9c6efe7f10ef69798891b7e5 SHA512 b46e9a1d40f891c5f3544d8cc6295900bff5dda9a4a526b8db55a42a37ae90deb216b316d2117984e82f4e918d15343e75b3b9e6d6c773866707c3398e032826
+DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 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
@@ -19,4 +20,5 @@ EBUILD llvm-libunwind-19.1.0_rc1.ebuild 3316 BLAKE2B bd35bebb24f85df1df172da2753
 EBUILD llvm-libunwind-19.1.0_rc2.ebuild 3316 BLAKE2B bd35bebb24f85df1df172da2753279735077353c2a2b06df35700ad58b32fecdb29f6045be9d3c51316e764bda2a75295fb879fd635da71747ad0ab11dc5649d SHA512 8211878d4fde53625702b27cce8bf7a09cf97238c52e1078f6895b58675f76c78aa60f8a886a2f25d0cf71becdcefd94e8666b9c8915fecbe5b47accdc9b988a
 EBUILD llvm-libunwind-20.0.0.9999.ebuild 3316 BLAKE2B bd35bebb24f85df1df172da2753279735077353c2a2b06df35700ad58b32fecdb29f6045be9d3c51316e764bda2a75295fb879fd635da71747ad0ab11dc5649d SHA512 8211878d4fde53625702b27cce8bf7a09cf97238c52e1078f6895b58675f76c78aa60f8a886a2f25d0cf71becdcefd94e8666b9c8915fecbe5b47accdc9b988a
 EBUILD llvm-libunwind-20.0.0_pre20240801.ebuild 3316 BLAKE2B bd35bebb24f85df1df172da2753279735077353c2a2b06df35700ad58b32fecdb29f6045be9d3c51316e764bda2a75295fb879fd635da71747ad0ab11dc5649d SHA512 8211878d4fde53625702b27cce8bf7a09cf97238c52e1078f6895b58675f76c78aa60f8a886a2f25d0cf71becdcefd94e8666b9c8915fecbe5b47accdc9b988a
+EBUILD llvm-libunwind-20.0.0_pre20240808.ebuild 3316 BLAKE2B bd35bebb24f85df1df172da2753279735077353c2a2b06df35700ad58b32fecdb29f6045be9d3c51316e764bda2a75295fb879fd635da71747ad0ab11dc5649d SHA512 8211878d4fde53625702b27cce8bf7a09cf97238c52e1078f6895b58675f76c78aa60f8a886a2f25d0cf71becdcefd94e8666b9c8915fecbe5b47accdc9b988a
 MISC metadata.xml 438 BLAKE2B 2a36fbbc59e137056029c62aef6d167d9c82531c2582d7bad5cb13cc36e5c4c9518ffe8c56d06bbcfd97ad22eda71a8b776f3984195f53d06cf45659b438dc00 SHA512 4f18b054072d00e5440faa31a59f9ef587d035b5f25e30913f0b1449debee967fa794fae2548e87db3fb2177ce853ab075e1f11f3cc763f5d7fdf06147108845
diff --git a/sys-libs/llvm-libunwind/llvm-libunwind-20.0.0_pre20240808.ebuild b/sys-libs/llvm-libunwind/llvm-libunwind-20.0.0_pre20240808.ebuild
new file mode 100644
index 000000000000..e4c76c15ebc8
--- /dev/null
+++ b/sys-libs/llvm-libunwind/llvm-libunwind-20.0.0_pre20240808.ebuild
@@ -0,0 +1,128 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..13} )
+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"
+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
+}