gentoo auto-resync : 09:02:2025 - 00:12:00

18 files changed, 1242 insertions, 11 deletions

diff --git a/llvm-runtimes/Manifest.gz b/llvm-runtimes/Manifest.gz
index 8d51e11290bf..41d532516923 100644
--- a/llvm-runtimes/Manifest.gz
+++ b/llvm-runtimes/Manifest.gz
diff --git a/llvm-runtimes/compiler-rt-sanitizers/Manifest b/llvm-runtimes/compiler-rt-sanitizers/Manifest
index 47e85a936f6c..ee3edbc312ce 100644
--- a/llvm-runtimes/compiler-rt-sanitizers/Manifest
+++ b/llvm-runtimes/compiler-rt-sanitizers/Manifest
@@ -17,6 +17,7 @@ DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf
 DIST llvm-project-1f26ac10ca1bef40a80be8f81a6f109713bc586f.tar.gz 226424755 BLAKE2B 642befb8d6923f335d1d68129ebb7357f8ba22e110df494dd956c8097e4e5db4b2a88fcc069ab67184b03558f072c68e002bdaf90eba865e38b1473a0ef29eed SHA512 e9bb4fd31bbad5ec864c662515b5ec2e5511cce975040f9f3cd8f009c92f76077928feae0467fd9519a001a379c857f7539c506953d8d5a9209a9f358f414aac
 DIST llvm-project-20.1.0-rc1.src.tar.xz 147144668 BLAKE2B ea4733962f38ea5897c73e91840818921739909c3671749bc8a0b1d2798e5a0815bbe750ade3a2a7414836ab7158754818b2f9370a4ee1bbbd52c96b1e95ef9b SHA512 c23c4b1227b6b0b7c3059358e64a00ee98893236bb1a0a41d7e821bdf2aa8353aea8f9f7b9498899c6807b9b8e2ceb06c3cd62e32fd07a786a319135055541b4
 DIST llvm-project-20.1.0-rc1.src.tar.xz.sig 566 BLAKE2B 32eb278ec4ff1bb9d258b584922b0d227f4126a957ba75af44dcaa63b6a12ef73db56d6a86f24244af47803ddf6a243149d784f08137cbea60b49700be537705 SHA512 d7a334326201f8ca78284b33c325f180538667a0401bc30931e790aacc96dd78f6559c45929b6c335d40ef1dbe772738c0ce55d881ae3d7401733778b485408c
+DIST llvm-project-6f241e36831927e3aea113cfc017c34fdeda340a.tar.gz 227203285 BLAKE2B 8d5e424c1836acc82ea766cd2cef104593c44d197ebeb64f18dbe74b1b5baeb4bc84084f5b68bd87ac36f7df25689dd2522cb6674a97da4f96f4f10f7bae5b06 SHA512 2b6e4bd6445eabfa3ace9b45d20797c7afc23f4553a8938399aeba227e3b8ca6a53a7d7762925a845bfed031c37af692b9c08180fbab80db2f3166940e560077
 DIST llvm-project-bfa7edcc6652bdb37d53e0cec64926aab3f280eb.tar.gz 226735989 BLAKE2B 165837dc526e618b44c49d5fa3dceda373452e010a09746bff248903fe77874637d05ab9f5d2f63de7ebce5c14e3b19a131313a4a557adfd20fe9cb93ab60476 SHA512 e9e19176fcf1302727ee34d69eaa820b94959d64ceaf754d8a93ebd5e262cec7fe35e87b08f705b09e42c3ea26b671318eecf10e9137c635b12f481f80fbac23
 EBUILD compiler-rt-sanitizers-15.0.7-r1.ebuild 6678 BLAKE2B 0261091e2c7a6a60e60811f0a04313689bedb56fccd645e595cacb0c85b7457007743d4f8be92e04c452031a0c2a314745ffee612ca724b796347a7b82d0253a SHA512 daf41b0aa6faf374b4d1cbb34234c5d0c3344aad72f80b50082eddd0e31f746451f44bb3bfc3f3a185ea139db846fac750d99d712b7e7f010a3b14c8e62b2060
 EBUILD compiler-rt-sanitizers-16.0.6-r1.ebuild 6665 BLAKE2B 3f465a8716096f3476f1bd46f3dfa959800e1ea0d46a062f02de600b9160043320c2edb02caa91f52ec18fca1d93bef2054395411962aea83f045b0cde4d9b57 SHA512 184805f8bdcf0fa8adc6196f26143d90b983cc61dc6f8ab23bc699dd6dd109cc07531ca87d4fae7d259cb8922bea14b37ae35237da9a824b0e62e960eac13476
@@ -28,4 +29,5 @@ EBUILD compiler-rt-sanitizers-20.0.0_pre20250125.ebuild 6404 BLAKE2B d317bd4d4c4
 EBUILD compiler-rt-sanitizers-20.1.0_rc1.ebuild 6404 BLAKE2B d317bd4d4c43deae61c6c6accd7b6db68d3ef16af965c9eed30a85483e2299a63e1d1acab7f5e080f98027408d66ca4057db0c3eccbcd94abfdabf51dae1b25d SHA512 5406797df47f496af1f57bfc25f2e1ccf2decf3607c9d03bf7561e1c0f820d7c67006614c35e448eca7c33d299dd355195a0c041d96a27fab3c6b5655d23fbbe
 EBUILD compiler-rt-sanitizers-21.0.0.9999.ebuild 6404 BLAKE2B d317bd4d4c43deae61c6c6accd7b6db68d3ef16af965c9eed30a85483e2299a63e1d1acab7f5e080f98027408d66ca4057db0c3eccbcd94abfdabf51dae1b25d SHA512 5406797df47f496af1f57bfc25f2e1ccf2decf3607c9d03bf7561e1c0f820d7c67006614c35e448eca7c33d299dd355195a0c041d96a27fab3c6b5655d23fbbe
 EBUILD compiler-rt-sanitizers-21.0.0_pre20250201.ebuild 6404 BLAKE2B d317bd4d4c43deae61c6c6accd7b6db68d3ef16af965c9eed30a85483e2299a63e1d1acab7f5e080f98027408d66ca4057db0c3eccbcd94abfdabf51dae1b25d SHA512 5406797df47f496af1f57bfc25f2e1ccf2decf3607c9d03bf7561e1c0f820d7c67006614c35e448eca7c33d299dd355195a0c041d96a27fab3c6b5655d23fbbe
+EBUILD compiler-rt-sanitizers-21.0.0_pre20250208.ebuild 6404 BLAKE2B d317bd4d4c43deae61c6c6accd7b6db68d3ef16af965c9eed30a85483e2299a63e1d1acab7f5e080f98027408d66ca4057db0c3eccbcd94abfdabf51dae1b25d SHA512 5406797df47f496af1f57bfc25f2e1ccf2decf3607c9d03bf7561e1c0f820d7c67006614c35e448eca7c33d299dd355195a0c041d96a27fab3c6b5655d23fbbe
 MISC metadata.xml 1657 BLAKE2B 9fd760c7d197b4bf4effd441027b22a0705e70294d1962a8c9b045897e206c5e222bfdb7b0e27e4753c9103f836ac4614f523d34a7621b0bf03770171aafdede SHA512 4800ff405f3599775e6276b0ce36043a702f328b14f1b8cfe940be5115d1787193be5475ad9323a6770e7621d7253db660e5de57797503d878dca67de934702e
diff --git a/llvm-runtimes/compiler-rt-sanitizers/compiler-rt-sanitizers-21.0.0_pre20250208.ebuild b/llvm-runtimes/compiler-rt-sanitizers/compiler-rt-sanitizers-21.0.0_pre20250208.ebuild
new file mode 100644
index 000000000000..5efa81abbe9b
--- /dev/null
+++ b/llvm-runtimes/compiler-rt-sanitizers/compiler-rt-sanitizers-21.0.0_pre20250208.ebuild
@@ -0,0 +1,222 @@
+# Copyright 1999-2025 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 nsan rtsan
+)
+IUSE+=" ${SANITIZER_FLAGS[@]/#/+}"
+REQUIRED_USE="
+	|| ( ${SANITIZER_FLAGS[*]} libfuzzer orc profile xray )
+	test? (
+		cfi? ( ubsan )
+		gwp-asan? ( scudo )
+	)
+"
+RESTRICT="
+	!clang? ( test )
+	!test? ( test )
+"
+
+DEPEND="
+	llvm-core/llvm:${LLVM_MAJOR}
+	virtual/libcrypt[abi_x86_32(-)?,abi_x86_64(-)?]
+"
+BDEPEND="
+	clang? (
+		llvm-core/clang:${LLVM_MAJOR}
+		llvm-runtimes/compiler-rt:${LLVM_MAJOR}
+	)
+	elibc_glibc? ( net-libs/libtirpc )
+	test? (
+		$(python_gen_any_dep ">=dev-python/lit-15[\${PYTHON_USEDEP}]")
+		=llvm-core/clang-${LLVM_VERSION}*:${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 llvm-runtimes/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/llvm-runtimes/compiler-rt/Manifest b/llvm-runtimes/compiler-rt/Manifest
index 75668da8a228..2d959a266cee 100644
--- a/llvm-runtimes/compiler-rt/Manifest
+++ b/llvm-runtimes/compiler-rt/Manifest
@@ -16,6 +16,7 @@ DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf
 DIST llvm-project-1f26ac10ca1bef40a80be8f81a6f109713bc586f.tar.gz 226424755 BLAKE2B 642befb8d6923f335d1d68129ebb7357f8ba22e110df494dd956c8097e4e5db4b2a88fcc069ab67184b03558f072c68e002bdaf90eba865e38b1473a0ef29eed SHA512 e9bb4fd31bbad5ec864c662515b5ec2e5511cce975040f9f3cd8f009c92f76077928feae0467fd9519a001a379c857f7539c506953d8d5a9209a9f358f414aac
 DIST llvm-project-20.1.0-rc1.src.tar.xz 147144668 BLAKE2B ea4733962f38ea5897c73e91840818921739909c3671749bc8a0b1d2798e5a0815bbe750ade3a2a7414836ab7158754818b2f9370a4ee1bbbd52c96b1e95ef9b SHA512 c23c4b1227b6b0b7c3059358e64a00ee98893236bb1a0a41d7e821bdf2aa8353aea8f9f7b9498899c6807b9b8e2ceb06c3cd62e32fd07a786a319135055541b4
 DIST llvm-project-20.1.0-rc1.src.tar.xz.sig 566 BLAKE2B 32eb278ec4ff1bb9d258b584922b0d227f4126a957ba75af44dcaa63b6a12ef73db56d6a86f24244af47803ddf6a243149d784f08137cbea60b49700be537705 SHA512 d7a334326201f8ca78284b33c325f180538667a0401bc30931e790aacc96dd78f6559c45929b6c335d40ef1dbe772738c0ce55d881ae3d7401733778b485408c
+DIST llvm-project-6f241e36831927e3aea113cfc017c34fdeda340a.tar.gz 227203285 BLAKE2B 8d5e424c1836acc82ea766cd2cef104593c44d197ebeb64f18dbe74b1b5baeb4bc84084f5b68bd87ac36f7df25689dd2522cb6674a97da4f96f4f10f7bae5b06 SHA512 2b6e4bd6445eabfa3ace9b45d20797c7afc23f4553a8938399aeba227e3b8ca6a53a7d7762925a845bfed031c37af692b9c08180fbab80db2f3166940e560077
 DIST llvm-project-bfa7edcc6652bdb37d53e0cec64926aab3f280eb.tar.gz 226735989 BLAKE2B 165837dc526e618b44c49d5fa3dceda373452e010a09746bff248903fe77874637d05ab9f5d2f63de7ebce5c14e3b19a131313a4a557adfd20fe9cb93ab60476 SHA512 e9e19176fcf1302727ee34d69eaa820b94959d64ceaf754d8a93ebd5e262cec7fe35e87b08f705b09e42c3ea26b671318eecf10e9137c635b12f481f80fbac23
 EBUILD compiler-rt-15.0.7-r1.ebuild 4252 BLAKE2B 39ed1e06453690d129552fcca79b7df77345d0a4f21d477521cd7638f492450abc7fed895471709dc3acc7f7944a2df9d89668c47bf48c6f5e9d9ab27440eea0 SHA512 9fe7a91466b8903d68009d39ce13282f2e661211f4b70bc2830119018bccf3f15c894488734451054f15e64cd258e9f517d5aa01432d5ba253f58660f4f79899
 EBUILD compiler-rt-15.0.7-r2.ebuild 4380 BLAKE2B b60b82c22641657d9bc56d1dca2d357757b1512f4f738f5f1c3f31456328350a778951e18ae756d375227f1e6bfff77ce2a8932a0064884b2d2854de0e31b60c SHA512 803c77378d9fc5b40c5ef65b55e9b3fd311bb9ba6473edefe4ffc88bcc6f79fbca656a63fcfd89a8c425b72c0e0683963ae4ff6399720ebdd6f260ccb3b6891e
@@ -31,4 +32,5 @@ EBUILD compiler-rt-20.0.0_pre20250125.ebuild 5100 BLAKE2B b2b32ab18b711afadb036d
 EBUILD compiler-rt-20.1.0_rc1.ebuild 5100 BLAKE2B b2b32ab18b711afadb036dfeca9c482ac709c410f1bd17acc01cdaa86b27575b1f06cd6db08f20c3fb104244ee7e10da78dab5dbcd7e47fd7786d91141334687 SHA512 522852d029b271677f97026d9eab52070b1eb0d24889735e845039a9626e3500cd2df8118c1890b0dad9fe57bdfd77089ce3e8c44293333bf7071d9a39608ee7
 EBUILD compiler-rt-21.0.0.9999.ebuild 5100 BLAKE2B b2b32ab18b711afadb036dfeca9c482ac709c410f1bd17acc01cdaa86b27575b1f06cd6db08f20c3fb104244ee7e10da78dab5dbcd7e47fd7786d91141334687 SHA512 522852d029b271677f97026d9eab52070b1eb0d24889735e845039a9626e3500cd2df8118c1890b0dad9fe57bdfd77089ce3e8c44293333bf7071d9a39608ee7
 EBUILD compiler-rt-21.0.0_pre20250201.ebuild 5100 BLAKE2B b2b32ab18b711afadb036dfeca9c482ac709c410f1bd17acc01cdaa86b27575b1f06cd6db08f20c3fb104244ee7e10da78dab5dbcd7e47fd7786d91141334687 SHA512 522852d029b271677f97026d9eab52070b1eb0d24889735e845039a9626e3500cd2df8118c1890b0dad9fe57bdfd77089ce3e8c44293333bf7071d9a39608ee7
+EBUILD compiler-rt-21.0.0_pre20250208.ebuild 5100 BLAKE2B b2b32ab18b711afadb036dfeca9c482ac709c410f1bd17acc01cdaa86b27575b1f06cd6db08f20c3fb104244ee7e10da78dab5dbcd7e47fd7786d91141334687 SHA512 522852d029b271677f97026d9eab52070b1eb0d24889735e845039a9626e3500cd2df8118c1890b0dad9fe57bdfd77089ce3e8c44293333bf7071d9a39608ee7
 MISC metadata.xml 610 BLAKE2B 2fd2530da10ecae7d8b54b448d0e0ec082b8082e3b5da8ab47dc79058724b368d5f900b1de18e14fe2c2b95257c69d0aceb9bd83b8b6873f65935302461ac263 SHA512 d50a05439376fa985ab1579a592cc6f544552e177132dc8773f172b827dec49ab3f8bcd77d89c25d4f2a1b99492897045b16a75ceb2d14cc76187140c33ccc45
diff --git a/llvm-runtimes/compiler-rt/compiler-rt-21.0.0_pre20250208.ebuild b/llvm-runtimes/compiler-rt/compiler-rt-21.0.0_pre20250208.ebuild
new file mode 100644
index 000000000000..c3b2eb0428cd
--- /dev/null
+++ b/llvm-runtimes/compiler-rt/compiler-rt-21.0.0_pre20250208.ebuild
@@ -0,0 +1,175 @@
+# Copyright 1999-2025 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 +atomic-builtins +clang +debug test"
+REQUIRED_USE="atomic-builtins? ( clang )"
+RESTRICT="!test? ( test ) !clang? ( test )"
+
+DEPEND="
+	llvm-core/llvm:${LLVM_MAJOR}
+"
+BDEPEND="
+	clang? ( llvm-core/clang:${LLVM_MAJOR} )
+	test? (
+		$(python_gen_any_dep ">=dev-python/lit-15[\${PYTHON_USEDEP}]")
+		=llvm-core/clang-${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/${LLVM_MAJOR}"
+
+		-DCOMPILER_RT_EXCLUDE_ATOMIC_BUILTIN=$(usex !atomic-builtins)
+		-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/llvm-runtimes/libcxx/Manifest b/llvm-runtimes/libcxx/Manifest
index 9268ff3cd4f8..8d1f2358fb27 100644
--- a/llvm-runtimes/libcxx/Manifest
+++ b/llvm-runtimes/libcxx/Manifest
@@ -15,6 +15,7 @@ DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf
 DIST llvm-project-1f26ac10ca1bef40a80be8f81a6f109713bc586f.tar.gz 226424755 BLAKE2B 642befb8d6923f335d1d68129ebb7357f8ba22e110df494dd956c8097e4e5db4b2a88fcc069ab67184b03558f072c68e002bdaf90eba865e38b1473a0ef29eed SHA512 e9bb4fd31bbad5ec864c662515b5ec2e5511cce975040f9f3cd8f009c92f76077928feae0467fd9519a001a379c857f7539c506953d8d5a9209a9f358f414aac
 DIST llvm-project-20.1.0-rc1.src.tar.xz 147144668 BLAKE2B ea4733962f38ea5897c73e91840818921739909c3671749bc8a0b1d2798e5a0815bbe750ade3a2a7414836ab7158754818b2f9370a4ee1bbbd52c96b1e95ef9b SHA512 c23c4b1227b6b0b7c3059358e64a00ee98893236bb1a0a41d7e821bdf2aa8353aea8f9f7b9498899c6807b9b8e2ceb06c3cd62e32fd07a786a319135055541b4
 DIST llvm-project-20.1.0-rc1.src.tar.xz.sig 566 BLAKE2B 32eb278ec4ff1bb9d258b584922b0d227f4126a957ba75af44dcaa63b6a12ef73db56d6a86f24244af47803ddf6a243149d784f08137cbea60b49700be537705 SHA512 d7a334326201f8ca78284b33c325f180538667a0401bc30931e790aacc96dd78f6559c45929b6c335d40ef1dbe772738c0ce55d881ae3d7401733778b485408c
+DIST llvm-project-6f241e36831927e3aea113cfc017c34fdeda340a.tar.gz 227203285 BLAKE2B 8d5e424c1836acc82ea766cd2cef104593c44d197ebeb64f18dbe74b1b5baeb4bc84084f5b68bd87ac36f7df25689dd2522cb6674a97da4f96f4f10f7bae5b06 SHA512 2b6e4bd6445eabfa3ace9b45d20797c7afc23f4553a8938399aeba227e3b8ca6a53a7d7762925a845bfed031c37af692b9c08180fbab80db2f3166940e560077
 DIST llvm-project-bfa7edcc6652bdb37d53e0cec64926aab3f280eb.tar.gz 226735989 BLAKE2B 165837dc526e618b44c49d5fa3dceda373452e010a09746bff248903fe77874637d05ab9f5d2f63de7ebce5c14e3b19a131313a4a557adfd20fe9cb93ab60476 SHA512 e9e19176fcf1302727ee34d69eaa820b94959d64ceaf754d8a93ebd5e262cec7fe35e87b08f705b09e42c3ea26b671318eecf10e9137c635b12f481f80fbac23
 EBUILD libcxx-15.0.7-r1.ebuild 5288 BLAKE2B 5c619de6d028fbce7abc50adec16c5c825ef39d7d7477b09aa02150e089b963928a54dcb5a9b7f02ddfa7827e1cccea35cfef7640561214bc16d0b81ea0d8e72 SHA512 410ae6f3ece045192cd6eb589c06f11a5b71d3e6fcfe882793d6a910ea0fa10ce5904874c7488280c5383b36954189255799a745be7aa98cfd27af6338dcfd66
 EBUILD libcxx-16.0.6.ebuild 5305 BLAKE2B 0a625868cac2747c0cae6cd722d238ad6f9ec80a4cfbaa1e927990975f6f40a509af4e227baa0b7c562123fc04f7059a6fe71f19061727cf68b22c789741e470 SHA512 f337115153389372c38d2fece3642f707fd0516b913626cb71b111850e853a4dafdcad98e852de01fb62e99044e197958319ef1179ffa248805eb1f27efc09ae
@@ -26,4 +27,5 @@ EBUILD libcxx-20.0.0_pre20250125.ebuild 5363 BLAKE2B 36588297fc0a88b8ae1818b6a79
 EBUILD libcxx-20.1.0_rc1.ebuild 5363 BLAKE2B 36588297fc0a88b8ae1818b6a79b3c1d369fa7061ecf21820e53d5fec1c979006a47ed01d0b2bebe9434b745960b557e4c3dff3ebc65d1abe248c8a12c6f6793 SHA512 4e61de21e8803f3ae4ca834ccf297ceea653c9a256f6e9cfc526d7ec6c133cd3d9c02b5a28d18e8701b6561117bb27d94704170d251164ac1277450725d37545
 EBUILD libcxx-21.0.0.9999.ebuild 5363 BLAKE2B 36588297fc0a88b8ae1818b6a79b3c1d369fa7061ecf21820e53d5fec1c979006a47ed01d0b2bebe9434b745960b557e4c3dff3ebc65d1abe248c8a12c6f6793 SHA512 4e61de21e8803f3ae4ca834ccf297ceea653c9a256f6e9cfc526d7ec6c133cd3d9c02b5a28d18e8701b6561117bb27d94704170d251164ac1277450725d37545
 EBUILD libcxx-21.0.0_pre20250201.ebuild 5363 BLAKE2B 36588297fc0a88b8ae1818b6a79b3c1d369fa7061ecf21820e53d5fec1c979006a47ed01d0b2bebe9434b745960b557e4c3dff3ebc65d1abe248c8a12c6f6793 SHA512 4e61de21e8803f3ae4ca834ccf297ceea653c9a256f6e9cfc526d7ec6c133cd3d9c02b5a28d18e8701b6561117bb27d94704170d251164ac1277450725d37545
+EBUILD libcxx-21.0.0_pre20250208.ebuild 5363 BLAKE2B 36588297fc0a88b8ae1818b6a79b3c1d369fa7061ecf21820e53d5fec1c979006a47ed01d0b2bebe9434b745960b557e4c3dff3ebc65d1abe248c8a12c6f6793 SHA512 4e61de21e8803f3ae4ca834ccf297ceea653c9a256f6e9cfc526d7ec6c133cd3d9c02b5a28d18e8701b6561117bb27d94704170d251164ac1277450725d37545
 MISC metadata.xml 603 BLAKE2B ed0b70336793f05ecd2c3412ccc5d25800d7aab1ed5a10223c1b181858174f87c3f87be6785cb6323b3c6413e88787d1d28347965255cd214a8ff2f0ac534de9 SHA512 34bfa522496f4c220a44f09d76562680d1a0465ee10ece62f2e96a383f70e7284549e60cbbba52c8dee37f743ee17b11777008d59f169d31555edce2261cf063
diff --git a/llvm-runtimes/libcxx/libcxx-21.0.0_pre20250208.ebuild b/llvm-runtimes/libcxx/libcxx-21.0.0_pre20250208.ebuild
new file mode 100644
index 000000000000..3bd46e20f1ca
--- /dev/null
+++ b/llvm-runtimes/libcxx/libcxx-21.0.0_pre20250208.ebuild
@@ -0,0 +1,208 @@
+# Copyright 1999-2025 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? (
+		~llvm-runtimes/libcxxabi-${PV}[static-libs?,${MULTILIB_USEDEP}]
+	)
+	!libcxxabi? ( >=sys-devel/gcc-4.7:=[cxx] )
+"
+DEPEND="
+	${RDEPEND}
+	llvm-core/llvm:${LLVM_MAJOR}
+"
+BDEPEND="
+	clang? (
+		llvm-core/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} libc 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 [[ ${CHOST} != *-darwin* ]] ; then
+		gen_shared_ldscript
+		use static-libs && gen_static_ldscript
+	fi
+}
+
+multilib_src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build install-cxx-test-suite-prefix
+	cp "${BUILD_DIR}"/{lib,libcxx/test-suite-install/$(get_libdir)}/libc++_shared.so || die
+	if use static-libs; then
+		cp "${BUILD_DIR}"/{lib,libcxx/test-suite-install/$(get_libdir)}/libc++_static.a || die
+	fi
+	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/llvm-runtimes/libcxxabi/Manifest b/llvm-runtimes/libcxxabi/Manifest
index a15229aa88c2..3eec5a64711c 100644
--- a/llvm-runtimes/libcxxabi/Manifest
+++ b/llvm-runtimes/libcxxabi/Manifest
@@ -13,6 +13,7 @@ DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf
 DIST llvm-project-1f26ac10ca1bef40a80be8f81a6f109713bc586f.tar.gz 226424755 BLAKE2B 642befb8d6923f335d1d68129ebb7357f8ba22e110df494dd956c8097e4e5db4b2a88fcc069ab67184b03558f072c68e002bdaf90eba865e38b1473a0ef29eed SHA512 e9bb4fd31bbad5ec864c662515b5ec2e5511cce975040f9f3cd8f009c92f76077928feae0467fd9519a001a379c857f7539c506953d8d5a9209a9f358f414aac
 DIST llvm-project-20.1.0-rc1.src.tar.xz 147144668 BLAKE2B ea4733962f38ea5897c73e91840818921739909c3671749bc8a0b1d2798e5a0815bbe750ade3a2a7414836ab7158754818b2f9370a4ee1bbbd52c96b1e95ef9b SHA512 c23c4b1227b6b0b7c3059358e64a00ee98893236bb1a0a41d7e821bdf2aa8353aea8f9f7b9498899c6807b9b8e2ceb06c3cd62e32fd07a786a319135055541b4
 DIST llvm-project-20.1.0-rc1.src.tar.xz.sig 566 BLAKE2B 32eb278ec4ff1bb9d258b584922b0d227f4126a957ba75af44dcaa63b6a12ef73db56d6a86f24244af47803ddf6a243149d784f08137cbea60b49700be537705 SHA512 d7a334326201f8ca78284b33c325f180538667a0401bc30931e790aacc96dd78f6559c45929b6c335d40ef1dbe772738c0ce55d881ae3d7401733778b485408c
+DIST llvm-project-6f241e36831927e3aea113cfc017c34fdeda340a.tar.gz 227203285 BLAKE2B 8d5e424c1836acc82ea766cd2cef104593c44d197ebeb64f18dbe74b1b5baeb4bc84084f5b68bd87ac36f7df25689dd2522cb6674a97da4f96f4f10f7bae5b06 SHA512 2b6e4bd6445eabfa3ace9b45d20797c7afc23f4553a8938399aeba227e3b8ca6a53a7d7762925a845bfed031c37af692b9c08180fbab80db2f3166940e560077
 DIST llvm-project-bfa7edcc6652bdb37d53e0cec64926aab3f280eb.tar.gz 226735989 BLAKE2B 165837dc526e618b44c49d5fa3dceda373452e010a09746bff248903fe77874637d05ab9f5d2f63de7ebce5c14e3b19a131313a4a557adfd20fe9cb93ab60476 SHA512 e9e19176fcf1302727ee34d69eaa820b94959d64ceaf754d8a93ebd5e262cec7fe35e87b08f705b09e42c3ea26b671318eecf10e9137c635b12f481f80fbac23
 EBUILD libcxxabi-15.0.7.ebuild 2917 BLAKE2B af1df60659fa913046b3a1102b6368af08de3cefb7b457dbbc64fdd748a26a3ad0d291ec761b1b3caed1763545dadb5e41a7c5a514f7c79ed69abd95035409d9 SHA512 3ec9832e0fd0dedb813c0e8d64851af3009fd260d7b1f875b6658a65518f354afdede9de8b3c60fa16af441f26dc72b233c7666d481510cda9eeb8c241a253e0
 EBUILD libcxxabi-16.0.6.ebuild 2937 BLAKE2B 001f82d6a06914ec59b28d1ba9d4696ab8f4a72ad14ca4bacaabef90c9feb0f17655435c62cbcc18169b43e0f212c21cee6defa975029cb57f4f38123339ae97 SHA512 85a6f852d3ec5594e2124a01ab1aa40fda558f810be45e51c12d886aaf6d79cf51fbd82436bb811a78ccb778ad27cadf7cdc6acb77fb84f2258d079a1fb9cb58
@@ -24,4 +25,5 @@ EBUILD libcxxabi-20.0.0_pre20250125.ebuild 2668 BLAKE2B 8971ce9199694dd4b545281f
 EBUILD libcxxabi-20.1.0_rc1.ebuild 2668 BLAKE2B 8971ce9199694dd4b545281f08feffd0d32794f2c0c1ef5d02020e0ce60813ceba0ff0d6e2734e5ba08137101234054fb398cb8df83ce28d4639f5b083720589 SHA512 fe7e1422ebd3710965dc509562a4222a0356291031fac5510e607f1d0d775a40e7feb86e1ae3dd6469d703433b314fd729e7a02935ebf69dfd8228ad035ff650
 EBUILD libcxxabi-21.0.0.9999.ebuild 2668 BLAKE2B 8971ce9199694dd4b545281f08feffd0d32794f2c0c1ef5d02020e0ce60813ceba0ff0d6e2734e5ba08137101234054fb398cb8df83ce28d4639f5b083720589 SHA512 fe7e1422ebd3710965dc509562a4222a0356291031fac5510e607f1d0d775a40e7feb86e1ae3dd6469d703433b314fd729e7a02935ebf69dfd8228ad035ff650
 EBUILD libcxxabi-21.0.0_pre20250201.ebuild 2668 BLAKE2B 8971ce9199694dd4b545281f08feffd0d32794f2c0c1ef5d02020e0ce60813ceba0ff0d6e2734e5ba08137101234054fb398cb8df83ce28d4639f5b083720589 SHA512 fe7e1422ebd3710965dc509562a4222a0356291031fac5510e607f1d0d775a40e7feb86e1ae3dd6469d703433b314fd729e7a02935ebf69dfd8228ad035ff650
+EBUILD libcxxabi-21.0.0_pre20250208.ebuild 2668 BLAKE2B 8971ce9199694dd4b545281f08feffd0d32794f2c0c1ef5d02020e0ce60813ceba0ff0d6e2734e5ba08137101234054fb398cb8df83ce28d4639f5b083720589 SHA512 fe7e1422ebd3710965dc509562a4222a0356291031fac5510e607f1d0d775a40e7feb86e1ae3dd6469d703433b314fd729e7a02935ebf69dfd8228ad035ff650
 MISC metadata.xml 438 BLAKE2B 0a830a06a53a6cdaf138ad7620fe366fae05c1c1451267d6a58caf7da5ce8f5a26d302fab53b9460920074ab5a65991d3bd24fde087809e8dc12188dd94c7676 SHA512 d53e13c497569636fb453a159c5ca5ddfabf8e5debd5f92e5149c52d54c876753842ab73293d6d08e2d9b279363b4f0c743eed3a5027a61246c6b60496be8e87
diff --git a/llvm-runtimes/libcxxabi/libcxxabi-21.0.0_pre20250208.ebuild b/llvm-runtimes/libcxxabi/libcxxabi-21.0.0_pre20250208.ebuild
new file mode 100644
index 000000000000..412d927e8b49
--- /dev/null
+++ b/llvm-runtimes/libcxxabi/libcxxabi-21.0.0_pre20250208.ebuild
@@ -0,0 +1,109 @@
+# Copyright 1999-2025 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+="
+	!<llvm-runtimes/libcxx-15
+"
+DEPEND="
+	${RDEPEND}
+	llvm-core/llvm:${LLVM_MAJOR}
+"
+BDEPEND="
+	clang? (
+		llvm-core/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=( libc 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="${EPREFIX}"/usr/include
+		# this is broken with standalone builds, and also meaningless
+		-DLIBCXXABI_USE_LLVM_UNWINDER=OFF
+
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=OFF
+		-DLIBCXX_CXX_ABI=libcxxabi
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(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/llvm-runtimes/libgcc/Manifest b/llvm-runtimes/libgcc/Manifest
index 9c2698aef208..9eee3fc5b0e6 100644
--- a/llvm-runtimes/libgcc/Manifest
+++ b/llvm-runtimes/libgcc/Manifest
@@ -3,10 +3,12 @@ DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf
 DIST llvm-project-1f26ac10ca1bef40a80be8f81a6f109713bc586f.tar.gz 226424755 BLAKE2B 642befb8d6923f335d1d68129ebb7357f8ba22e110df494dd956c8097e4e5db4b2a88fcc069ab67184b03558f072c68e002bdaf90eba865e38b1473a0ef29eed SHA512 e9bb4fd31bbad5ec864c662515b5ec2e5511cce975040f9f3cd8f009c92f76077928feae0467fd9519a001a379c857f7539c506953d8d5a9209a9f358f414aac
 DIST llvm-project-20.1.0-rc1.src.tar.xz 147144668 BLAKE2B ea4733962f38ea5897c73e91840818921739909c3671749bc8a0b1d2798e5a0815bbe750ade3a2a7414836ab7158754818b2f9370a4ee1bbbd52c96b1e95ef9b SHA512 c23c4b1227b6b0b7c3059358e64a00ee98893236bb1a0a41d7e821bdf2aa8353aea8f9f7b9498899c6807b9b8e2ceb06c3cd62e32fd07a786a319135055541b4
 DIST llvm-project-20.1.0-rc1.src.tar.xz.sig 566 BLAKE2B 32eb278ec4ff1bb9d258b584922b0d227f4126a957ba75af44dcaa63b6a12ef73db56d6a86f24244af47803ddf6a243149d784f08137cbea60b49700be537705 SHA512 d7a334326201f8ca78284b33c325f180538667a0401bc30931e790aacc96dd78f6559c45929b6c335d40ef1dbe772738c0ce55d881ae3d7401733778b485408c
+DIST llvm-project-6f241e36831927e3aea113cfc017c34fdeda340a.tar.gz 227203285 BLAKE2B 8d5e424c1836acc82ea766cd2cef104593c44d197ebeb64f18dbe74b1b5baeb4bc84084f5b68bd87ac36f7df25689dd2522cb6674a97da4f96f4f10f7bae5b06 SHA512 2b6e4bd6445eabfa3ace9b45d20797c7afc23f4553a8938399aeba227e3b8ca6a53a7d7762925a845bfed031c37af692b9c08180fbab80db2f3166940e560077
 DIST llvm-project-bfa7edcc6652bdb37d53e0cec64926aab3f280eb.tar.gz 226735989 BLAKE2B 165837dc526e618b44c49d5fa3dceda373452e010a09746bff248903fe77874637d05ab9f5d2f63de7ebce5c14e3b19a131313a4a557adfd20fe9cb93ab60476 SHA512 e9e19176fcf1302727ee34d69eaa820b94959d64ceaf754d8a93ebd5e262cec7fe35e87b08f705b09e42c3ea26b671318eecf10e9137c635b12f481f80fbac23
 EBUILD libgcc-19.1.7.ebuild 4045 BLAKE2B 0652485ecb35eb096883accd91d8ac571fdc06d32833d979b078139710357a9a8f2fdca2f39277691e116a8da0abeeed554418f403e865cb99387556e3de393a SHA512 d1de13cbc904e156f1e6f50c2afab045d92cc0fc99f943a935f161c9f6a0fc47811b322ec71858866e6767d0a634025cbd81519c34aa78bb5f72737b3790364e
 EBUILD libgcc-20.0.0_pre20250125.ebuild 4027 BLAKE2B 57ce1132135527807f141f447e5868339d962c06935020d6d74be25845e4641bacfe74fec49fbb31267174b2b57f1b9f698ee64c035faa3b7a81076885604bf2 SHA512 84a21baa57a21bb60261139b68d5a4d615f91aeec5f330a37cd081ade278804e15f60216cef4a723b84f6b2cca6019dfb19ccc687528ccaa7d95351fe4433189
 EBUILD libgcc-20.1.0_rc1.ebuild 4027 BLAKE2B 57ce1132135527807f141f447e5868339d962c06935020d6d74be25845e4641bacfe74fec49fbb31267174b2b57f1b9f698ee64c035faa3b7a81076885604bf2 SHA512 84a21baa57a21bb60261139b68d5a4d615f91aeec5f330a37cd081ade278804e15f60216cef4a723b84f6b2cca6019dfb19ccc687528ccaa7d95351fe4433189
 EBUILD libgcc-21.0.0.9999.ebuild 4027 BLAKE2B 57ce1132135527807f141f447e5868339d962c06935020d6d74be25845e4641bacfe74fec49fbb31267174b2b57f1b9f698ee64c035faa3b7a81076885604bf2 SHA512 84a21baa57a21bb60261139b68d5a4d615f91aeec5f330a37cd081ade278804e15f60216cef4a723b84f6b2cca6019dfb19ccc687528ccaa7d95351fe4433189
 EBUILD libgcc-21.0.0_pre20250201.ebuild 4027 BLAKE2B 57ce1132135527807f141f447e5868339d962c06935020d6d74be25845e4641bacfe74fec49fbb31267174b2b57f1b9f698ee64c035faa3b7a81076885604bf2 SHA512 84a21baa57a21bb60261139b68d5a4d615f91aeec5f330a37cd081ade278804e15f60216cef4a723b84f6b2cca6019dfb19ccc687528ccaa7d95351fe4433189
+EBUILD libgcc-21.0.0_pre20250208.ebuild 4027 BLAKE2B 57ce1132135527807f141f447e5868339d962c06935020d6d74be25845e4641bacfe74fec49fbb31267174b2b57f1b9f698ee64c035faa3b7a81076885604bf2 SHA512 84a21baa57a21bb60261139b68d5a4d615f91aeec5f330a37cd081ade278804e15f60216cef4a723b84f6b2cca6019dfb19ccc687528ccaa7d95351fe4433189
 MISC metadata.xml 416 BLAKE2B 05a5a2fdfc857b5a522141deb8ee7f20f82773021ffc583cd869b129cf34fc809900ad90a01c049d5e108ca3fbf297208733ed0c49849b139e591afbdfa2a933 SHA512 866c5ea5585a8229eda9fdb4f6dba1453d3cff86083b51b115edc766aea7c02b4b306bd113b28cb5b3f2306951530ab0a2947681d0ffd1e6cee7b572d282f97d
diff --git a/llvm-runtimes/libgcc/libgcc-21.0.0_pre20250208.ebuild b/llvm-runtimes/libgcc/libgcc-21.0.0_pre20250208.ebuild
new file mode 100644
index 000000000000..c1ca1f41c22a
--- /dev/null
+++ b/llvm-runtimes/libgcc/libgcc-21.0.0_pre20250208.ebuild
@@ -0,0 +1,155 @@
+# Copyright 1999-2025 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, compatible with libgcc_s"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="0"
+IUSE="debug test"
+
+DEPEND="
+	~llvm-runtimes/libunwind-${PV}[static-libs]
+"
+RDEPEND="
+	${DEPEND}
+	!sys-devel/gcc
+"
+BDEPEND="
+	llvm-core/clang:${LLVM_MAJOR}
+	test? (
+		$(python_gen_any_dep ">=dev-python/lit-15[\${PYTHON_USEDEP}]")
+		=llvm-core/clang-${LLVM_VERSION}*:${LLVM_MAJOR}
+	)
+	!test? (
+		${PYTHON_DEPS}
+	)
+"
+
+LLVM_COMPONENTS=( compiler-rt cmake llvm/cmake llvm-libgcc )
+LLVM_TEST_COMPONENTS=( llvm/include/llvm/TargetParser )
+llvm.org_set_globals
+
+python_check_deps() {
+	use test || return 0
+	python_has_version ">=dev-python/lit-15[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	if target_is_not_host || tc-is-cross-compiler ; then
+		# strips vars like CFLAGS="-march=x86_64-v3" for non-x86 architectures
+		CHOST=${CTARGET} strip-unsupported-flags
+		# overrides host docs otherwise
+		DOCS=()
+	fi
+	python-any-r1_pkg_setup
+}
+
+src_configure() {
+	# We need to build a separate copy of compiler-rt, because we need to disable the
+	# COMPILER_RT_BUILTINS_HIDE_SYMBOLS option - compatibility with libgcc requires
+	# visibility of all symbols.
+
+	llvm_prepend_path "${LLVM_MAJOR}"
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+
+	export CC=${CTARGET}-clang CXX=${CTARGET}-clang++
+	strip-unsupported-flags
+
+	local mycmakeargs=(
+		-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${LLVM_MAJOR}"
+
+		-DCOMPILER_RT_INCLUDE_TESTS=$(usex test)
+		-DCOMPILER_RT_BUILD_CRT=OFF
+		-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
+
+		-DCOMPILER_RT_BUILTINS_HIDE_SYMBOLS=OFF
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+
+	# disable building non-native runtimes since we don't do multilib
+	if use amd64; then
+		mycmakeargs+=(
+			-DCAN_TARGET_i386=OFF
+		)
+	fi
+
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${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/${LLVM_MAJOR}/bin/clang++"
+		)
+	fi
+
+	cmake_src_configure
+}
+
+src_compile() {
+	cmake_src_compile
+
+	local rtlib=$(
+		"${CC}" -rtlib=compiler-rt -resource-dir="${BUILD_DIR}" \
+			-print-libgcc-file-name || die
+	)
+
+	# Use the llvm-libgcc's version script to produce libgcc.{a,so}, which
+	# combines compiler-rt and libunwind into a libgcc replacement.
+	#
+	# What we do here is similar to what upstream does[0], with the following
+	# differences:
+	#
+	# * We build the local copy of compiler-rt manually, to have a full control
+	#   over CMake options.
+	# * Upstream links the locally built copy of libunwind statically. We link the
+	#   system-wide libunwind dynamically.
+	#
+	# [0] https://github.com/llvm/llvm-project/blob/llvmorg-19.1.7/llvm-libgcc/CMakeLists.txt#L102-L120
+	"${CC}" -E -xc \
+		"${WORKDIR}/llvm-libgcc/gcc_s.ver.in" \
+		-o gcc_s.ver || die
+	"${CC}" -nostdlib \
+		${LDFLAGS} \
+		-Wl,--version-script,gcc_s.ver \
+		-Wl,--undefined-version \
+		-Wl,--whole-archive \
+		"${rtlib}" \
+		-Wl,-soname,libgcc_s.so.1.0 \
+		-lc -lunwind -shared \
+		-o libgcc_s.so.1.0 || die
+	cp "${rtlib}" libgcc.a || die
+}
+
+src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+
+	cmake_build check-builtins
+}
+
+src_install() {
+	local libdir=$(get_libdir)
+	dolib.so libgcc_s.so.1.0
+	dolib.a libgcc.a
+	dosym libgcc_s.so.1.0 "/usr/${libdir}/libgcc_s.so.1"
+	dosym libgcc_s.so.1 "/usr/${libdir}/libgcc_s.so"
+	dosym libunwind.a "/usr/${libdir}/libgcc_eh.a"
+}
diff --git a/llvm-runtimes/libunwind/Manifest b/llvm-runtimes/libunwind/Manifest
index 5c3e3c3fa54c..9798ab936db2 100644
--- a/llvm-runtimes/libunwind/Manifest
+++ b/llvm-runtimes/libunwind/Manifest
@@ -13,6 +13,7 @@ DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf
 DIST llvm-project-1f26ac10ca1bef40a80be8f81a6f109713bc586f.tar.gz 226424755 BLAKE2B 642befb8d6923f335d1d68129ebb7357f8ba22e110df494dd956c8097e4e5db4b2a88fcc069ab67184b03558f072c68e002bdaf90eba865e38b1473a0ef29eed SHA512 e9bb4fd31bbad5ec864c662515b5ec2e5511cce975040f9f3cd8f009c92f76077928feae0467fd9519a001a379c857f7539c506953d8d5a9209a9f358f414aac
 DIST llvm-project-20.1.0-rc1.src.tar.xz 147144668 BLAKE2B ea4733962f38ea5897c73e91840818921739909c3671749bc8a0b1d2798e5a0815bbe750ade3a2a7414836ab7158754818b2f9370a4ee1bbbd52c96b1e95ef9b SHA512 c23c4b1227b6b0b7c3059358e64a00ee98893236bb1a0a41d7e821bdf2aa8353aea8f9f7b9498899c6807b9b8e2ceb06c3cd62e32fd07a786a319135055541b4
 DIST llvm-project-20.1.0-rc1.src.tar.xz.sig 566 BLAKE2B 32eb278ec4ff1bb9d258b584922b0d227f4126a957ba75af44dcaa63b6a12ef73db56d6a86f24244af47803ddf6a243149d784f08137cbea60b49700be537705 SHA512 d7a334326201f8ca78284b33c325f180538667a0401bc30931e790aacc96dd78f6559c45929b6c335d40ef1dbe772738c0ce55d881ae3d7401733778b485408c
+DIST llvm-project-6f241e36831927e3aea113cfc017c34fdeda340a.tar.gz 227203285 BLAKE2B 8d5e424c1836acc82ea766cd2cef104593c44d197ebeb64f18dbe74b1b5baeb4bc84084f5b68bd87ac36f7df25689dd2522cb6674a97da4f96f4f10f7bae5b06 SHA512 2b6e4bd6445eabfa3ace9b45d20797c7afc23f4553a8938399aeba227e3b8ca6a53a7d7762925a845bfed031c37af692b9c08180fbab80db2f3166940e560077
 DIST llvm-project-bfa7edcc6652bdb37d53e0cec64926aab3f280eb.tar.gz 226735989 BLAKE2B 165837dc526e618b44c49d5fa3dceda373452e010a09746bff248903fe77874637d05ab9f5d2f63de7ebce5c14e3b19a131313a4a557adfd20fe9cb93ab60476 SHA512 e9e19176fcf1302727ee34d69eaa820b94959d64ceaf754d8a93ebd5e262cec7fe35e87b08f705b09e42c3ea26b671318eecf10e9137c635b12f481f80fbac23
 EBUILD libunwind-15.0.7.ebuild 3033 BLAKE2B 6e08d31003b5fc913e2110be4fe5a66bb91a89d48b26e570576cb804d6dbc23ea94b5b34ab9aea9c6ad9aacb5420b7a52ab8d6832b57ee24f02b98daae835166 SHA512 e156a322ae7f657ba3634ae07c6332e06ea033deb9235de8f36595dba1823c67fe1bb035f99de51f454e8c036239ea4835fd25719d199231c635ce4fd71dff16
 EBUILD libunwind-16.0.6-r1.ebuild 3440 BLAKE2B 046d1ad89188255e9d0622620b58e0255af6476ce7c23ab3053bb31cde58c6908fcf6558c237b18010d68d324a8bfc04860e80ad405ed17e934045f51053a603 SHA512 ebcc9d5bef24e5b4ede57b37b8c3e5bd4071801e5852562153db3f07fd16dc75ccef7e25b1f61082b3938f711bdafc981f970fbe054fa52a76e87ab0157c155c
@@ -24,4 +25,5 @@ EBUILD libunwind-20.0.0_pre20250125.ebuild 3321 BLAKE2B 94a670819b3cc94bd6707c83
 EBUILD libunwind-20.1.0_rc1.ebuild 3321 BLAKE2B 94a670819b3cc94bd6707c8340d066d887e166df10b7fa77042d4df60908811367828d145a5a7b7be9d9ca714c30fe6753101f31792b755ffddfe0e0a5e7e2d4 SHA512 29c5c65f079393d408171407b93af3f295c4f26be7a054ca6d49248af50f3a4ebe85c5edebbaa11aecc379a101a994041d53036a5d3776775b33cdcc07569a7e
 EBUILD libunwind-21.0.0.9999.ebuild 3321 BLAKE2B 94a670819b3cc94bd6707c8340d066d887e166df10b7fa77042d4df60908811367828d145a5a7b7be9d9ca714c30fe6753101f31792b755ffddfe0e0a5e7e2d4 SHA512 29c5c65f079393d408171407b93af3f295c4f26be7a054ca6d49248af50f3a4ebe85c5edebbaa11aecc379a101a994041d53036a5d3776775b33cdcc07569a7e
 EBUILD libunwind-21.0.0_pre20250201.ebuild 3321 BLAKE2B 94a670819b3cc94bd6707c8340d066d887e166df10b7fa77042d4df60908811367828d145a5a7b7be9d9ca714c30fe6753101f31792b755ffddfe0e0a5e7e2d4 SHA512 29c5c65f079393d408171407b93af3f295c4f26be7a054ca6d49248af50f3a4ebe85c5edebbaa11aecc379a101a994041d53036a5d3776775b33cdcc07569a7e
+EBUILD libunwind-21.0.0_pre20250208.ebuild 3321 BLAKE2B 94a670819b3cc94bd6707c8340d066d887e166df10b7fa77042d4df60908811367828d145a5a7b7be9d9ca714c30fe6753101f31792b755ffddfe0e0a5e7e2d4 SHA512 29c5c65f079393d408171407b93af3f295c4f26be7a054ca6d49248af50f3a4ebe85c5edebbaa11aecc379a101a994041d53036a5d3776775b33cdcc07569a7e
 MISC metadata.xml 438 BLAKE2B 2a36fbbc59e137056029c62aef6d167d9c82531c2582d7bad5cb13cc36e5c4c9518ffe8c56d06bbcfd97ad22eda71a8b776f3984195f53d06cf45659b438dc00 SHA512 4f18b054072d00e5440faa31a59f9ef587d035b5f25e30913f0b1449debee967fa794fae2548e87db3fb2177ce853ab075e1f11f3cc763f5d7fdf06147108845
diff --git a/llvm-runtimes/libunwind/libunwind-21.0.0_pre20250208.ebuild b/llvm-runtimes/libunwind/libunwind-21.0.0_pre20250208.ebuild
new file mode 100644
index 000000000000..4a6714b162db
--- /dev/null
+++ b/llvm-runtimes/libunwind/libunwind-21.0.0_pre20250208.ebuild
@@ -0,0 +1,128 @@
+# Copyright 1999-2025 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="
+	llvm-core/llvm:${LLVM_MAJOR}
+"
+BDEPEND="
+	clang? (
+		llvm-core/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=( libc 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
+}
diff --git a/llvm-runtimes/offload/Manifest b/llvm-runtimes/offload/Manifest
index 76514109dd53..cc92ccc473c8 100644
--- a/llvm-runtimes/offload/Manifest
+++ b/llvm-runtimes/offload/Manifest
@@ -3,10 +3,12 @@ DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf
 DIST llvm-project-1f26ac10ca1bef40a80be8f81a6f109713bc586f.tar.gz 226424755 BLAKE2B 642befb8d6923f335d1d68129ebb7357f8ba22e110df494dd956c8097e4e5db4b2a88fcc069ab67184b03558f072c68e002bdaf90eba865e38b1473a0ef29eed SHA512 e9bb4fd31bbad5ec864c662515b5ec2e5511cce975040f9f3cd8f009c92f76077928feae0467fd9519a001a379c857f7539c506953d8d5a9209a9f358f414aac
 DIST llvm-project-20.1.0-rc1.src.tar.xz 147144668 BLAKE2B ea4733962f38ea5897c73e91840818921739909c3671749bc8a0b1d2798e5a0815bbe750ade3a2a7414836ab7158754818b2f9370a4ee1bbbd52c96b1e95ef9b SHA512 c23c4b1227b6b0b7c3059358e64a00ee98893236bb1a0a41d7e821bdf2aa8353aea8f9f7b9498899c6807b9b8e2ceb06c3cd62e32fd07a786a319135055541b4
 DIST llvm-project-20.1.0-rc1.src.tar.xz.sig 566 BLAKE2B 32eb278ec4ff1bb9d258b584922b0d227f4126a957ba75af44dcaa63b6a12ef73db56d6a86f24244af47803ddf6a243149d784f08137cbea60b49700be537705 SHA512 d7a334326201f8ca78284b33c325f180538667a0401bc30931e790aacc96dd78f6559c45929b6c335d40ef1dbe772738c0ce55d881ae3d7401733778b485408c
+DIST llvm-project-6f241e36831927e3aea113cfc017c34fdeda340a.tar.gz 227203285 BLAKE2B 8d5e424c1836acc82ea766cd2cef104593c44d197ebeb64f18dbe74b1b5baeb4bc84084f5b68bd87ac36f7df25689dd2522cb6674a97da4f96f4f10f7bae5b06 SHA512 2b6e4bd6445eabfa3ace9b45d20797c7afc23f4553a8938399aeba227e3b8ca6a53a7d7762925a845bfed031c37af692b9c08180fbab80db2f3166940e560077
 DIST llvm-project-bfa7edcc6652bdb37d53e0cec64926aab3f280eb.tar.gz 226735989 BLAKE2B 165837dc526e618b44c49d5fa3dceda373452e010a09746bff248903fe77874637d05ab9f5d2f63de7ebce5c14e3b19a131313a4a557adfd20fe9cb93ab60476 SHA512 e9e19176fcf1302727ee34d69eaa820b94959d64ceaf754d8a93ebd5e262cec7fe35e87b08f705b09e42c3ea26b671318eecf10e9137c635b12f481f80fbac23
 EBUILD offload-19.1.7.ebuild 4282 BLAKE2B 270be743903361bb49585f795a23c9c05cfdf4a09b557f178ee842098c4a58aca60508f4cc6f28e29efa5cc027af83fecb73dd7f6d3b14b758220449e8d7b12f SHA512 56805ebf8af58d8aa3d26837de3b995a144a93b698ef25cd1a2c047e7d9a3c29e178a39a506db807d4a274fe475cbd6ca9285bcf395dbd5af98bdd23559196ef
 EBUILD offload-20.0.0_pre20250125.ebuild 3814 BLAKE2B 723d81be97e67f60a47c332e659b4dea5ed36d14738817f29e4bab4ed596b744e49d1b3acd71cc8c9d9d604ac985060863a08d96551bbdff41ca234d7ec046ae SHA512 a3a3fda2cb2b2eb3a2aa3e29ab5b3da3d76b58e392cc4f28fdd5c90c40849ca65ff9c9ac180cd495b036a3d57214f2379794bda6c0d2d16fc752576ef09425f0
 EBUILD offload-20.1.0_rc1.ebuild 3814 BLAKE2B 723d81be97e67f60a47c332e659b4dea5ed36d14738817f29e4bab4ed596b744e49d1b3acd71cc8c9d9d604ac985060863a08d96551bbdff41ca234d7ec046ae SHA512 a3a3fda2cb2b2eb3a2aa3e29ab5b3da3d76b58e392cc4f28fdd5c90c40849ca65ff9c9ac180cd495b036a3d57214f2379794bda6c0d2d16fc752576ef09425f0
-EBUILD offload-21.0.0.9999.ebuild 3814 BLAKE2B 723d81be97e67f60a47c332e659b4dea5ed36d14738817f29e4bab4ed596b744e49d1b3acd71cc8c9d9d604ac985060863a08d96551bbdff41ca234d7ec046ae SHA512 a3a3fda2cb2b2eb3a2aa3e29ab5b3da3d76b58e392cc4f28fdd5c90c40849ca65ff9c9ac180cd495b036a3d57214f2379794bda6c0d2d16fc752576ef09425f0
+EBUILD offload-21.0.0.9999.ebuild 3633 BLAKE2B 3b2c5963c4f1549287f43bdf02a35b49f33f7946ca8233a70d3cdd7fa4a1288ecb9e2273220c5e5c8d794b11eea5df76c06bac3713add62332e8826341cbbc53 SHA512 1cccec0d4458497a3d0a2a01cc228e3db4c15e6ca9b809fd4044827a6461002834bef3a000cfc6c528562ac05e11fe27975a56fa6e6d497295424b847dcff84e
 EBUILD offload-21.0.0_pre20250201.ebuild 3814 BLAKE2B 723d81be97e67f60a47c332e659b4dea5ed36d14738817f29e4bab4ed596b744e49d1b3acd71cc8c9d9d604ac985060863a08d96551bbdff41ca234d7ec046ae SHA512 a3a3fda2cb2b2eb3a2aa3e29ab5b3da3d76b58e392cc4f28fdd5c90c40849ca65ff9c9ac180cd495b036a3d57214f2379794bda6c0d2d16fc752576ef09425f0
+EBUILD offload-21.0.0_pre20250208.ebuild 3633 BLAKE2B 3b2c5963c4f1549287f43bdf02a35b49f33f7946ca8233a70d3cdd7fa4a1288ecb9e2273220c5e5c8d794b11eea5df76c06bac3713add62332e8826341cbbc53 SHA512 1cccec0d4458497a3d0a2a01cc228e3db4c15e6ca9b809fd4044827a6461002834bef3a000cfc6c528562ac05e11fe27975a56fa6e6d497295424b847dcff84e
 MISC metadata.xml 379 BLAKE2B 2b4c75d4ec6e126d887b736ea978c4b34683a347252f408c9d1f5f55c6c1bead7b7f9533812806f816538d8abaa00ded4d439dbe626d3f2cf09b78a3674e41bd SHA512 d49054d4b5a1a051d83f1ef397a7925fb36ee3092668d134e6ed5c1218bf5d67a43145b689709677643da070a783ec9f8705b37f15587475829fe185634af1d4
diff --git a/llvm-runtimes/offload/offload-21.0.0.9999.ebuild b/llvm-runtimes/offload/offload-21.0.0.9999.ebuild
index 77e2f9dc1763..449f09fef8cf 100644
--- a/llvm-runtimes/offload/offload-21.0.0.9999.ebuild
+++ b/llvm-runtimes/offload/offload-21.0.0.9999.ebuild
@@ -4,7 +4,7 @@
 EAPI=8
 
 PYTHON_COMPAT=( python3_{10..13} )
-inherit cmake flag-o-matic llvm.org python-any-r1 toolchain-funcs
+inherit cmake llvm.org python-any-r1 toolchain-funcs
 
 DESCRIPTION="OpenMP offloading support"
 HOMEPAGE="https://openmp.llvm.org"
@@ -39,10 +39,6 @@ BDEPEND="
 		llvm-core/clang
 	)
 "
-# TODO: can it be fixed to compile with gcc?
-BDEPEND+="
-	llvm-core/clang
-"
 
 LLVM_COMPONENTS=( offload cmake runtimes/cmake libc/shared )
 LLVM_TEST_COMPONENTS=( openmp/cmake )
@@ -67,11 +63,6 @@ pkg_setup() {
 }
 
 src_configure() {
-	# TODO
-	local -x CC=${CHOST}-clang
-	local -x CXX=${CHOST}-clang++
-	strip-unsupported-flags
-
 	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
 	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
 
diff --git a/llvm-runtimes/offload/offload-21.0.0_pre20250208.ebuild b/llvm-runtimes/offload/offload-21.0.0_pre20250208.ebuild
new file mode 100644
index 000000000000..449f09fef8cf
--- /dev/null
+++ b/llvm-runtimes/offload/offload-21.0.0_pre20250208.ebuild
@@ -0,0 +1,139 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..13} )
+inherit cmake llvm.org python-any-r1 toolchain-funcs
+
+DESCRIPTION="OpenMP offloading support"
+HOMEPAGE="https://openmp.llvm.org"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="0/${LLVM_SOABI}"
+IUSE="+debug ompt test llvm_targets_AMDGPU llvm_targets_NVPTX"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	dev-libs/libffi:=
+	~llvm-core/llvm-${PV}
+	~llvm-runtimes/openmp-${PV}[ompt?]
+	llvm_targets_AMDGPU? ( dev-libs/rocr-runtime:= )
+"
+DEPEND="
+	${RDEPEND}
+"
+# tests:
+# - dev-python/lit provides the test runner
+# - llvm-core/llvm provide test utils (e.g. FileCheck)
+# - llvm-core/clang provides the compiler to run tests
+BDEPEND="
+	dev-lang/perl
+	virtual/pkgconfig
+	llvm_targets_AMDGPU? ( llvm-core/clang[llvm_targets_AMDGPU] )
+	llvm_targets_NVPTX? ( llvm-core/clang[llvm_targets_NVPTX] )
+	test? (
+		$(python_gen_any_dep '
+			dev-python/lit[${PYTHON_USEDEP}]
+		')
+		llvm-core/clang
+	)
+"
+
+LLVM_COMPONENTS=( offload cmake runtimes/cmake libc/shared )
+LLVM_TEST_COMPONENTS=( openmp/cmake )
+llvm.org_set_globals
+
+pkg_pretend() {
+	if [[ ${LLVM_ALLOW_GPU_TESTING} ]]; then
+		ewarn "LLVM_ALLOW_GPU_TESTING set.  This package will run tests against your"
+		ewarn "GPU if it is supported.  Note that these tests may be flaky, fail or"
+		ewarn "hang, or even cause your GPU to crash (requiring a reboot)."
+	fi
+}
+
+python_check_deps() {
+	python_has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	if use test; then
+		python-any-r1_pkg_setup
+	fi
+}
+
+src_configure() {
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+
+	local libdir="$(get_libdir)"
+	local ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
+	local ffi_ldflags=$($(tc-getPKG_CONFIG) --libs-only-L libffi)
+	local plugins="host"
+	local build_devicertl=FALSE
+
+	if has "${CHOST%%-*}" aarch64 powerpc64le x86_64; then
+		if use llvm_targets_AMDGPU; then
+			plugins+=";amdgpu"
+			build_devicertl=TRUE
+		fi
+		if use llvm_targets_NVPTX; then
+			plugins+=";cuda"
+			build_devicertl=TRUE
+		fi
+	fi
+
+	local mycmakeargs=(
+		-DLLVM_ROOT="${ESYSROOT}/usr/lib/llvm/${LLVM_MAJOR}"
+
+		-DOFFLOAD_LIBDIR_SUFFIX="${libdir#lib}"
+		-DLIBOMPTARGET_PLUGINS_TO_BUILD="${plugins}"
+		-DLIBOMPTARGET_OMPT_SUPPORT="$(usex ompt)"
+		-DLIBOMPTARGET_BUILD_DEVICERTL_BCLIB="${build_devicertl}"
+
+		# this breaks building static target libs
+		-DBUILD_SHARED_LIBS=OFF
+
+		-DFFI_INCLUDE_DIR="${ffi_cflags#-I}"
+		-DFFI_LIBRARY_DIR="${ffi_ldflags#-L}"
+	)
+
+	[[ ! ${LLVM_ALLOW_GPU_TESTING} ]] && mycmakeargs+=(
+		# prevent trying to access the GPU
+		-DLIBOMPTARGET_AMDGPU_ARCH=LIBOMPTARGET_AMDGPU_ARCH-NOTFOUND
+		-DLIBOMPTARGET_NVPTX_ARCH=LIBOMPTARGET_NVPTX_ARCH-NOTFOUND
+	)
+	use test && mycmakeargs+=(
+		# this project does not use standard LLVM cmake macros
+		-DOPENMP_LLVM_LIT_EXECUTABLE="${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++")"
+		# requires flang
+		-DOPENMP_TEST_Fortran_COMPILER=
+	)
+
+	cmake_src_configure
+
+	if [[ ${build_devicertl} == FALSE ]]; then
+		# clang requires libomptarget.devicertl.a, but it can be empty
+		> "${BUILD_DIR}"/libomptarget.devicertl.a || die
+	fi
+}
+
+src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+
+	cmake_build check-offload
+}
+
+src_install() {
+	cmake_src_install
+
+	if [[ ! -f ${ED}/usr/$(get_libdir)/libomptarget.devicertl.a ]]
+	then
+		dolib.a "${BUILD_DIR}"/libomptarget.devicertl.a
+	fi
+}
diff --git a/llvm-runtimes/openmp/Manifest b/llvm-runtimes/openmp/Manifest
index 66377b8a7272..420bf02c7e6e 100644
--- a/llvm-runtimes/openmp/Manifest
+++ b/llvm-runtimes/openmp/Manifest
@@ -14,6 +14,7 @@ DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf
 DIST llvm-project-1f26ac10ca1bef40a80be8f81a6f109713bc586f.tar.gz 226424755 BLAKE2B 642befb8d6923f335d1d68129ebb7357f8ba22e110df494dd956c8097e4e5db4b2a88fcc069ab67184b03558f072c68e002bdaf90eba865e38b1473a0ef29eed SHA512 e9bb4fd31bbad5ec864c662515b5ec2e5511cce975040f9f3cd8f009c92f76077928feae0467fd9519a001a379c857f7539c506953d8d5a9209a9f358f414aac
 DIST llvm-project-20.1.0-rc1.src.tar.xz 147144668 BLAKE2B ea4733962f38ea5897c73e91840818921739909c3671749bc8a0b1d2798e5a0815bbe750ade3a2a7414836ab7158754818b2f9370a4ee1bbbd52c96b1e95ef9b SHA512 c23c4b1227b6b0b7c3059358e64a00ee98893236bb1a0a41d7e821bdf2aa8353aea8f9f7b9498899c6807b9b8e2ceb06c3cd62e32fd07a786a319135055541b4
 DIST llvm-project-20.1.0-rc1.src.tar.xz.sig 566 BLAKE2B 32eb278ec4ff1bb9d258b584922b0d227f4126a957ba75af44dcaa63b6a12ef73db56d6a86f24244af47803ddf6a243149d784f08137cbea60b49700be537705 SHA512 d7a334326201f8ca78284b33c325f180538667a0401bc30931e790aacc96dd78f6559c45929b6c335d40ef1dbe772738c0ce55d881ae3d7401733778b485408c
+DIST llvm-project-6f241e36831927e3aea113cfc017c34fdeda340a.tar.gz 227203285 BLAKE2B 8d5e424c1836acc82ea766cd2cef104593c44d197ebeb64f18dbe74b1b5baeb4bc84084f5b68bd87ac36f7df25689dd2522cb6674a97da4f96f4f10f7bae5b06 SHA512 2b6e4bd6445eabfa3ace9b45d20797c7afc23f4553a8938399aeba227e3b8ca6a53a7d7762925a845bfed031c37af692b9c08180fbab80db2f3166940e560077
 DIST llvm-project-bfa7edcc6652bdb37d53e0cec64926aab3f280eb.tar.gz 226735989 BLAKE2B 165837dc526e618b44c49d5fa3dceda373452e010a09746bff248903fe77874637d05ab9f5d2f63de7ebce5c14e3b19a131313a4a557adfd20fe9cb93ab60476 SHA512 e9e19176fcf1302727ee34d69eaa820b94959d64ceaf754d8a93ebd5e262cec7fe35e87b08f705b09e42c3ea26b671318eecf10e9137c635b12f481f80fbac23
 EBUILD openmp-15.0.7-r6.ebuild 3471 BLAKE2B a6878395f003d40944adfcabbf2247e1ab8833ae54d2a16824e5a99edff94f4a985d4fc706964b3f26b0e55166234be5e68aa63b1c5b819d35413e1c8b6438f8 SHA512 4c08ce8624b029cf516b364172616c7d2fa22355d937ca72f76fc881f1539a441302e08c9dad75496e7f0229bca61802ef449ecf429b067eb24118e46978bab9
 EBUILD openmp-16.0.6.ebuild 3984 BLAKE2B b8507f3eea34c530720512140fa811036893bca9a3ebf25b2d2a90d6302759038017b7a9e0999865ede4e6a96a8bb558ffc46e330f34ca0ed60e741747a32259 SHA512 2dea5938ccc1d0e955fc8ff134ff03a54754b063932c5eece47769d21fe29d19ac9135c01d78d76d577faf7ba046548e57306f1a31fa747a392d241131c5707f
@@ -25,4 +26,5 @@ EBUILD openmp-20.0.0_pre20250125.ebuild 2163 BLAKE2B 32d4f786dfd0dd01d755dc0b89f
 EBUILD openmp-20.1.0_rc1.ebuild 2163 BLAKE2B 32d4f786dfd0dd01d755dc0b89f3b4d3f05a586c6ca094a8ada24bad3d20bd2f21c4e8c5ff46919ffe51a7d3700e7fcb0dead077fa4e3760e8d384f3a4d3b8d1 SHA512 4c0aabde5394133bd45020cf1ae107ae3f337731d67974f29fb667d340dc356a238ee593558337bf1bce479cc12016bf71a1599102667454c500f77deeb5e68c
 EBUILD openmp-21.0.0.9999.ebuild 2163 BLAKE2B 32d4f786dfd0dd01d755dc0b89f3b4d3f05a586c6ca094a8ada24bad3d20bd2f21c4e8c5ff46919ffe51a7d3700e7fcb0dead077fa4e3760e8d384f3a4d3b8d1 SHA512 4c0aabde5394133bd45020cf1ae107ae3f337731d67974f29fb667d340dc356a238ee593558337bf1bce479cc12016bf71a1599102667454c500f77deeb5e68c
 EBUILD openmp-21.0.0_pre20250201.ebuild 2163 BLAKE2B 32d4f786dfd0dd01d755dc0b89f3b4d3f05a586c6ca094a8ada24bad3d20bd2f21c4e8c5ff46919ffe51a7d3700e7fcb0dead077fa4e3760e8d384f3a4d3b8d1 SHA512 4c0aabde5394133bd45020cf1ae107ae3f337731d67974f29fb667d340dc356a238ee593558337bf1bce479cc12016bf71a1599102667454c500f77deeb5e68c
+EBUILD openmp-21.0.0_pre20250208.ebuild 2163 BLAKE2B 32d4f786dfd0dd01d755dc0b89f3b4d3f05a586c6ca094a8ada24bad3d20bd2f21c4e8c5ff46919ffe51a7d3700e7fcb0dead077fa4e3760e8d384f3a4d3b8d1 SHA512 4c0aabde5394133bd45020cf1ae107ae3f337731d67974f29fb667d340dc356a238ee593558337bf1bce479cc12016bf71a1599102667454c500f77deeb5e68c
 MISC metadata.xml 883 BLAKE2B 127e896b82a49633a6866b33ca776ebe2dd149a5d04da4484a53186f219a85db0ab9d826bc1cc61d4df9fa54c9bcc546be070a0b28985174925fd947aa09cca2 SHA512 dc32cae01401feb93eede6506b3955c766ff19b44976fcc67277559b23ac151993377daeed9ba83b2dd71dbdeea330cd1208dcb0c9c5f56be270883b31f9b15f
diff --git a/llvm-runtimes/openmp/openmp-21.0.0_pre20250208.ebuild b/llvm-runtimes/openmp/openmp-21.0.0_pre20250208.ebuild
new file mode 100644
index 000000000000..6a485191767b
--- /dev/null
+++ b/llvm-runtimes/openmp/openmp-21.0.0_pre20250208.ebuild
@@ -0,0 +1,88 @@
+# Copyright 1999-2025 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
+# - llvm-core/llvm provide test utils (e.g. FileCheck)
+# - llvm-core/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}]
+		')
+		llvm-core/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
+}