gentoo auto-resync : 16:08:2024 - 12:22:56

18 files changed, 1633 insertions, 5 deletions

diff --git a/sys-devel/Manifest.gz b/sys-devel/Manifest.gz
index 470b1d95d36b..bbd601eee7a6 100644
--- a/sys-devel/Manifest.gz
+++ b/sys-devel/Manifest.gz
diff --git a/sys-devel/bpf-toolchain/Manifest b/sys-devel/bpf-toolchain/Manifest
index 1acc70a80dbb..b340afe02461 100644
--- a/sys-devel/bpf-toolchain/Manifest
+++ b/sys-devel/bpf-toolchain/Manifest
@@ -1,4 +1,4 @@
 DIST binutils-2.43.tar.xz 28175768 BLAKE2B 28b0a04a28273b76eab2d00e00160be889f155f77f5a9d8759ef8dce505c97e97641bf7ec70b92b731b520570a02b06e04e8215b068fcb1bb2573e9ef24732d9 SHA512 93e063163e54d6a6ee2bd48dc754270bf757a3635b49a702ed6b310e929e94063958512d191e66beaf44275f7ea60865dbde138b624626739679fcc306b133bb
 DIST gcc-14.2.0.tar.xz 92306460 BLAKE2B 87baf2a06dfa75d8fb6cd62c747ef1f57d3b9bbbe33a360d9ed3de4b4dbeaa8d920504c67e409bd9863414202c14fd854b46108e984418171205119216d03d3b SHA512 932bdef0cda94bacedf452ab17f103c0cb511ff2cec55e9112fc0328cbf1d803b42595728ea7b200e0a057c03e85626f937012e49a7515bc5dd256b2bf4bc396
-EBUILD bpf-toolchain-14.2.0.ebuild 5435 BLAKE2B f81234bd9550045ab935fdf1b0343c954dddc83d06f19193d4c08cd589264d0f31c71ba17e146fd18f32e522653f8cfdfb4eba94ca0bf68eb080bfeb0133ab1a SHA512 d0d9a518d0bb86429a56babfa0ffb353f7aa16eace9e4bb26f1dcb207e1f715fe7021ff06aa69c37713cff5c4e38efa73c00fa49eb6cb3ea270ecf947d46ae3f
-MISC metadata.xml 394 BLAKE2B 4985eaa40c572af9a7ada59b41494a2bd95090a16fba4a9bbbcded4652a03d46dc3678ab882407235bfe77fae729971155d4720e0325f649276ddd72ff96b715 SHA512 29d42cdee5df81b868c07ea9d5419cbbc0f816c69153f24fc63ff8beeee308f85d89bd3e4351b98949e578bcbc4532d06cf2054849774a4e7d9e1c0ee78083e4
+EBUILD bpf-toolchain-14.2.0-r2.ebuild 6405 BLAKE2B 61eb6539afcd81ce031ccd47557de7d0a9595beae7cb9b879c85b6142a133cf1b643dfa87c4f65205ad27bd2562d233a5753619416bfbe8822c37f295a3e34e1 SHA512 51dc4ee4c569eb577847e418973892effade98bdc54688c06c64e546fd5959e12ca08c68e57347dd89880bf32f028ce7a164334ef8ea1d2b68b028af6b1aae84
+MISC metadata.xml 599 BLAKE2B c41d219a2ba989105be860668dae9a75ed7283924017bc5f452853325f7800d90f87f3acd8c56c51efbc150a45d630f20dff2867a73753e4a71fef2cc5adea04 SHA512 c0e7d480106f9803602288191de6b5295d80c8f4da7458dd1630dcb40ea67cf0e1258865bd7be646306b60700c991ed15c487d54c083f2a65717ac46c27a70de
diff --git a/sys-devel/bpf-toolchain/bpf-toolchain-14.2.0.ebuild b/sys-devel/bpf-toolchain/bpf-toolchain-14.2.0-r2.ebuild
index aba05ad111a3..dfd388189afa 100644
--- a/sys-devel/bpf-toolchain/bpf-toolchain-14.2.0.ebuild
+++ b/sys-devel/bpf-toolchain/bpf-toolchain-14.2.0-r2.ebuild
@@ -41,8 +41,7 @@ LICENSE="
 "
 SLOT="0"
 KEYWORDS="-* ~amd64"
-# TODO: USE=strip, USE=bin-symlinks from dev-util/mingw64-toolchain
-IUSE="custom-cflags"
+IUSE="+bin-symlinks custom-cflags +strip"
 
 RDEPEND="
 	dev-libs/gmp:=
@@ -50,6 +49,10 @@ RDEPEND="
 	dev-libs/mpfr:=
 	sys-libs/zlib:=
 	virtual/libiconv
+	bin-symlinks? (
+		!cross-bpf-unknown-none/binutils
+		!cross-bpf-unknown-none/gcc
+	)
 "
 DEPEND="${RDEPEND}"
 
@@ -81,7 +84,8 @@ src_compile() {
 	CTARGET=bpf-unknown-none
 
 	BPFT_D=${T}/root # moved to ${D} in src_install
-	local prefix=${EPREFIX}/usr
+	local bpftdir=/usr/lib/${PN}
+	local prefix=${EPREFIX}${bpftdir}
 	local sysroot=${BPFT_D}${prefix}
 	local -x PATH=${sysroot}/bin:${PATH}
 
@@ -177,10 +181,29 @@ src_compile() {
 	bpft-build binutils
 	bpft-build gcc
 
+	if use bin-symlinks; then
+		mkdir -p -- "${BPFT_D}${EPREFIX}"/usr/bin/ || die
+		local bin
+		for bin in "${sysroot}"/bin/*; do
+			ln -rs -- "${bin}" "${BPFT_D}${EPREFIX}"/usr/bin/ || die
+		done
+	fi
+
 	# Delete libdep.a, which has a colliding name and is useless for bpf,
 	# which does not make use of cross-library dependencies: the libdep.a
 	# for the native binutils will do.
 	rm -f ${sysroot}/lib/bfd-plugins/libdep.a || die
+
+	# portage doesn't know the right strip executable to use for CTARGET
+	# and it can lead to .a mangling, notably with 32bit (breaks toolchain)
+	dostrip -x ${bpftdir}/{${CTARGET}/lib{,32},lib/gcc/${CTARGET}}
+
+	# TODO: Check if this is worth doing, it may not be
+	if use strip; then
+		einfo "Stripping ${CTARGET} static libraries ..."
+		find "${sysroot}"/{,lib/gcc/}${CTARGET} -type f -name '*.a' \
+			-exec ${CTARGET}-strip --strip-unneeded {} + || die
+	fi
 }
 
 src_install() {
@@ -190,6 +213,9 @@ src_install() {
 }
 
 pkg_postinst() {
+	use bin-symlinks && has_version dev-util/shadowman && [[ ! ${ROOT} ]] &&
+		eselect compiler-shadow update all
+
 	if [[ ! ${REPLACING_VERSIONS} ]]; then
 		elog "Note that this package is primarily intended for DTrace, systemd, and related"
 		elog "packages to depend on without needing a manual crossdev setup."
@@ -199,3 +225,8 @@ pkg_postinst() {
 		elog "    https://wiki.gentoo.org/wiki/Crossdev"
 	fi
 }
+
+pkg_postrm() {
+	use bin-symlinks && has_version dev-util/shadowman && [[ ! ${ROOT} ]] &&
+		eselect compiler-shadow clean all
+}
diff --git a/sys-devel/bpf-toolchain/metadata.xml b/sys-devel/bpf-toolchain/metadata.xml
index 12065082990f..34b44dd721cd 100644
--- a/sys-devel/bpf-toolchain/metadata.xml
+++ b/sys-devel/bpf-toolchain/metadata.xml
@@ -5,6 +5,13 @@
 		<email>toolchain@gentoo.org</email>
 		<name>Gentoo Toolchain Project</name>
 	</maintainer>
+	<use>
+		<flag name="bin-symlinks">
+			Symlink executables to usr/bin to be in default
+			PATH (conflicts with crossdev bpf, and crossdev
+			is preferable for a fully featured toolchain)
+		</flag>
+	</use>
 	<upstream>
 		<remote-id type="cpe">cpe:/a:gnu:gcc</remote-id>
 		<remote-id type="cpe">cpe:/a:gnu:binutils</remote-id>
diff --git a/sys-devel/clang-common/Manifest b/sys-devel/clang-common/Manifest
index 631a4c26d5a8..62d2eb5604c0 100644
--- a/sys-devel/clang-common/Manifest
+++ b/sys-devel/clang-common/Manifest
@@ -8,6 +8,7 @@ DIST llvm-project-18.1.8.src.tar.xz 132067260 BLAKE2B a950492f1dbfb874dff63b1ffe
 DIST llvm-project-18.1.8.src.tar.xz.sig 566 BLAKE2B 6ab0efc5b38d4483f4e32e8b85774b2edd5d88fdf29f23b88eb0b5130a7a7f0e80549612b025f927e92de4a08ff7c292cff224dbda91a5d598244e98f7ad0fbd SHA512 ddfd1e8a06756759af6cbe488c82a6d6a62ba91f3e8a0eb4cece561321824f5d165b08ed91010588790b76e19790931d2651b24dba8567e3b151d3cb43bec25b
 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-db8ef6188cbbe2125e6d60bdef77a535105772df.tar.gz 218416682 BLAKE2B 691e3881e4a60c008c6b766b51ecc856122de1f40242ff1d91ebaa12682fea0a22f84783eb930c42d196f50ba0d3b2010f9010ed73ee7e292fe78c93d6e3f324 SHA512 2dc16a603b60607cc3daee2de0126a567a78c4fff72b2fbcb94c82472bc5ec64ac354ba8592b9a643248a5bfd43b34e2a60f2751a0c9e9e28b7f895fc50a5e9d
 DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 EBUILD clang-common-15.0.7-r8.ebuild 5482 BLAKE2B 20e8744166a852b4dbc233f128807e60bb204f14558d2cc1691b1a87777be2775d1a6c82a108945f795b02919bc47bf213b1a85e45f423c49a6009aed0fbbc3b SHA512 bf1f5cdf47c6772266117e9545994dcfb27cfd263a5e7749604106686d8e56b8b45ddab7073d6baf73e966304162f3aad755075c11dbb16bb42b88fa78e6face
 EBUILD clang-common-16.0.6-r4.ebuild 5726 BLAKE2B de26b88570bf487a2be2a59f4551c8e61b940fb84b0dc3cb5be1884252672782700b657fb63c0b7ac247ec2092b236a550b51273f73ec19fab7db6eeda0ff94e SHA512 9f2778fbb89d578e162b36c7a692219533437d9fbec407422e7aff1b11d942f09c8cf0edb5c5bd37bbf34523b1f947b418f954b632d769f836baa7d2493bc527
@@ -17,4 +18,5 @@ EBUILD clang-common-18.1.8-r1.ebuild 9151 BLAKE2B 43a8bcc9b07107ab5a743722d04afc
 EBUILD clang-common-19.1.0_rc2.ebuild 9042 BLAKE2B 7fc18661a55e2c223cc3c4e6c8477a913a0ed025b013f4407e58682f00f389cc2961c8cd5ee20d13e75b51f1c8a0b79569a0bb35da6a2028703f9fee553ed4c0 SHA512 212b4035d367e465de90d6b89c81388e45023257aec550dfe81c7ca71ea0a8d59b2ece092c8cbc4b5eadf4d29a3fbde6a49e6fdbce3fde8ccd1300dc7fafdf58
 EBUILD clang-common-20.0.0.9999.ebuild 9042 BLAKE2B 7fc18661a55e2c223cc3c4e6c8477a913a0ed025b013f4407e58682f00f389cc2961c8cd5ee20d13e75b51f1c8a0b79569a0bb35da6a2028703f9fee553ed4c0 SHA512 212b4035d367e465de90d6b89c81388e45023257aec550dfe81c7ca71ea0a8d59b2ece092c8cbc4b5eadf4d29a3fbde6a49e6fdbce3fde8ccd1300dc7fafdf58
 EBUILD clang-common-20.0.0_pre20240808.ebuild 9042 BLAKE2B 7fc18661a55e2c223cc3c4e6c8477a913a0ed025b013f4407e58682f00f389cc2961c8cd5ee20d13e75b51f1c8a0b79569a0bb35da6a2028703f9fee553ed4c0 SHA512 212b4035d367e465de90d6b89c81388e45023257aec550dfe81c7ca71ea0a8d59b2ece092c8cbc4b5eadf4d29a3fbde6a49e6fdbce3fde8ccd1300dc7fafdf58
+EBUILD clang-common-20.0.0_pre20240815.ebuild 9042 BLAKE2B 7fc18661a55e2c223cc3c4e6c8477a913a0ed025b013f4407e58682f00f389cc2961c8cd5ee20d13e75b51f1c8a0b79569a0bb35da6a2028703f9fee553ed4c0 SHA512 212b4035d367e465de90d6b89c81388e45023257aec550dfe81c7ca71ea0a8d59b2ece092c8cbc4b5eadf4d29a3fbde6a49e6fdbce3fde8ccd1300dc7fafdf58
 MISC metadata.xml 1248 BLAKE2B d9c542ec74a08857a87a42927feef909c343b5b672145e471ebc69753a3f93432d2ae93ed2659a67d504e2c5ff4212640e4208b173d96e5a173a1043766b66f8 SHA512 eb6d4be1dfbdf6b70b774d42493f6b3015472d5e4bba9386254f6e4ae92307169fe1ac6f0f613d452a9c21c6d61ed57ab50efb54813146983f4d6809b32ddacb
diff --git a/sys-devel/clang-common/clang-common-20.0.0_pre20240815.ebuild b/sys-devel/clang-common/clang-common-20.0.0_pre20240815.ebuild
new file mode 100644
index 000000000000..090a45690818
--- /dev/null
+++ b/sys-devel/clang-common/clang-common-20.0.0_pre20240815.ebuild
@@ -0,0 +1,304 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit bash-completion-r1 llvm.org multilib
+
+DESCRIPTION="Common files shared between multiple slots of clang"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0"
+IUSE="
+	default-compiler-rt default-libcxx default-lld
+	bootstrap-prefix cet hardened llvm-libunwind
+"
+
+PDEPEND="
+	sys-devel/clang:*
+	default-compiler-rt? (
+		sys-devel/clang-runtime[compiler-rt]
+		llvm-libunwind? ( sys-libs/llvm-libunwind[static-libs] )
+		!llvm-libunwind? ( sys-libs/libunwind[static-libs] )
+	)
+	!default-compiler-rt? ( sys-devel/gcc )
+	default-libcxx? ( >=sys-libs/libcxx-${PV}[static-libs] )
+	!default-libcxx? ( sys-devel/gcc )
+	default-lld? ( >=sys-devel/lld-${PV} )
+	!default-lld? ( sys-devel/binutils )
+"
+IDEPEND="
+	!default-compiler-rt? ( sys-devel/gcc-config )
+	!default-libcxx? ( sys-devel/gcc-config )
+"
+
+LLVM_COMPONENTS=( clang/utils )
+llvm.org_set_globals
+
+pkg_pretend() {
+	[[ ${CLANG_IGNORE_DEFAULT_RUNTIMES} ]] && return
+
+	local flag missing_flags=()
+	for flag in default-{compiler-rt,libcxx,lld}; do
+		if ! use "${flag}" && has_version "sys-devel/clang[${flag}]"; then
+			missing_flags+=( "${flag}" )
+		fi
+	done
+
+	if [[ ${missing_flags[@]} ]]; then
+		eerror "It seems that you have the following flags set on sys-devel/clang:"
+		eerror
+		eerror "  ${missing_flags[*]}"
+		eerror
+		eerror "The default runtimes are now set via flags on sys-devel/clang-common."
+		eerror "The build is being aborted to prevent breakage.  Please either set"
+		eerror "the respective flags on this ebuild, e.g.:"
+		eerror
+		eerror "  sys-devel/clang-common ${missing_flags[*]}"
+		eerror
+		eerror "or build with CLANG_IGNORE_DEFAULT_RUNTIMES=1."
+		die "Mismatched defaults detected between sys-devel/clang and sys-devel/clang-common"
+	fi
+}
+
+_doclang_cfg() {
+	local triple="${1}"
+
+	local tool
+	for tool in ${triple}-clang{,++}; do
+		newins - "${tool}.cfg" <<-EOF
+			# This configuration file is used by ${tool} driver.
+			@gentoo-common.cfg
+			@gentoo-common-ld.cfg
+		EOF
+		if [[ ${triple} == x86_64* ]]; then
+			cat >> "${ED}/etc/clang/${tool}.cfg" <<-EOF || die
+				@gentoo-cet.cfg
+			EOF
+		fi
+	done
+
+	if use kernel_Darwin; then
+		cat >> "${ED}/etc/clang/${triple}-clang++.cfg" <<-EOF || die
+			-lc++abi
+		EOF
+	fi
+
+	newins - "${triple}-clang-cpp.cfg" <<-EOF
+		# This configuration file is used by the ${triple}-clang-cpp driver.
+		@gentoo-common.cfg
+	EOF
+	if [[ ${triple} == x86_64* ]]; then
+		cat >> "${ED}/etc/clang/${triple}-clang-cpp.cfg" <<-EOF || die
+			@gentoo-cet.cfg
+		EOF
+	fi
+
+	# Install symlinks for triples with other vendor strings since some
+	# programs insist on mangling the triple.
+	local vendor
+	for vendor in gentoo pc unknown; do
+		local vendor_triple="${triple%%-*}-${vendor}-${triple#*-*-}"
+		for tool in clang{,++,-cpp}; do
+			if [[ ! -f "${ED}/etc/clang/${vendor_triple}-${tool}.cfg" ]]; then
+				dosym "${triple}-${tool}.cfg" "/etc/clang/${vendor_triple}-${tool}.cfg"
+			fi
+		done
+	done
+}
+
+doclang_cfg() {
+	local triple="${1}"
+
+	_doclang_cfg ${triple}
+
+	# LLVM may have different arch names in some cases. For example in x86
+	# profiles the triple uses i686, but llvm will prefer i386 if invoked
+	# with "clang" on x86 or "clang -m32" on x86_64. The gentoo triple will
+	# be used if invoked through ${CHOST}-clang{,++,-cpp} though.
+	#
+	# To make sure the correct triples are installed,
+	# see Triple::getArchTypeName() in llvm/lib/TargetParser/Triple.cpp
+	# and compare with CHOST values in profiles.
+
+	local abi=${triple%%-*}
+	case ${abi} in
+		armv4l|armv4t|armv5tel|armv6j|armv7a)
+			_doclang_cfg ${triple/${abi}/arm}
+			;;
+		i686)
+			_doclang_cfg ${triple/${abi}/i386}
+			;;
+		sparc)
+			_doclang_cfg ${triple/${abi}/sparcel}
+			;;
+		sparc64)
+			_doclang_cfg ${triple/${abi}/sparcv9}
+			;;
+	esac
+}
+
+src_install() {
+	newbashcomp bash-autocomplete.sh clang
+
+	insinto /etc/clang
+	newins - gentoo-runtimes.cfg <<-EOF
+		# This file is initially generated by sys-devel/clang-runtime.
+		# It is used to control the default runtimes using by clang.
+
+		--rtlib=$(usex default-compiler-rt compiler-rt libgcc)
+		--unwindlib=$(usex default-compiler-rt libunwind libgcc)
+		--stdlib=$(usex default-libcxx libc++ libstdc++)
+		-fuse-ld=$(usex default-lld lld bfd)
+	EOF
+
+	newins - gentoo-gcc-install.cfg <<-EOF
+		# This file is maintained by gcc-config.
+		# It is used to specify the selected GCC installation.
+	EOF
+
+	newins - gentoo-common.cfg <<-EOF
+		# This file contains flags common to clang, clang++ and clang-cpp.
+		@gentoo-runtimes.cfg
+		@gentoo-gcc-install.cfg
+		@gentoo-hardened.cfg
+		# bug #870001
+		-include "${EPREFIX}/usr/include/gentoo/maybe-stddefs.h"
+	EOF
+
+	# clang-cpp does not like link args being passed to it when directly
+	# invoked, so use a separate configuration file.
+	newins - gentoo-common-ld.cfg <<-EOF
+		# This file contains flags common to clang and clang++
+		@gentoo-hardened-ld.cfg
+	EOF
+
+	# Baseline hardening (bug #851111)
+	newins - gentoo-hardened.cfg <<-EOF
+		# Some of these options are added unconditionally, regardless of
+		# USE=hardened, for parity with sys-devel/gcc.
+		-Xarch_host -fstack-clash-protection
+		-Xarch_host -fstack-protector-strong
+		-fPIE
+		-include "${EPREFIX}/usr/include/gentoo/fortify.h"
+	EOF
+
+	newins - gentoo-cet.cfg <<-EOF
+		-Xarch_host -fcf-protection=$(usex cet full none)
+	EOF
+
+	if use kernel_Darwin; then
+		newins - gentoo-hardened-ld.cfg <<-EOF
+			# There was -Wl,-z,relro here, but it's not supported on Mac
+			# TODO: investigate whether -bind_at_load or -read_only_stubs will do the job
+		EOF
+	else
+		newins - gentoo-hardened-ld.cfg <<-EOF
+			# Some of these options are added unconditionally, regardless of
+			# USE=hardened, for parity with sys-devel/gcc.
+			-Wl,-z,relro
+			-Wl,-z,now
+		EOF
+	fi
+
+	dodir /usr/include/gentoo
+
+	cat >> "${ED}/usr/include/gentoo/maybe-stddefs.h" <<-EOF || die
+	/* __has_include is an extension, but it's fine, because this is only
+	for Clang anyway. */
+	#if defined __has_include && __has_include (<stdc-predef.h>) && !defined(__GLIBC__)
+	# include <stdc-predef.h>
+	#endif
+	EOF
+
+	local fortify_level=$(usex hardened 3 2)
+	# We have to do this because glibc's headers warn if F_S is set
+	# without optimization and that would at the very least be very noisy
+	# during builds and at worst trigger many -Werror builds.
+	cat >> "${ED}/usr/include/gentoo/fortify.h" <<- EOF || die
+	#ifdef __clang__
+	# pragma clang system_header
+	#endif
+	#ifndef _FORTIFY_SOURCE
+	# if defined(__has_feature)
+	#  define __GENTOO_HAS_FEATURE(x) __has_feature(x)
+	# else
+	#  define __GENTOO_HAS_FEATURE(x) 0
+	# endif
+	#
+	# if defined(__STDC_HOSTED__) && __STDC_HOSTED__ == 1
+	#  define __GENTOO_NOT_FREESTANDING 1
+	# else
+	#  define __GENTOO_NOT_FREESTANDING 0
+	# endif
+	#
+	# if defined(__OPTIMIZE__) && __OPTIMIZE__ > 0 && __GENTOO_NOT_FREESTANDING > 0
+	#  if !defined(__SANITIZE_ADDRESS__) && !__GENTOO_HAS_FEATURE(address_sanitizer) && !__GENTOO_HAS_FEATURE(memory_sanitizer)
+	#   define _FORTIFY_SOURCE ${fortify_level}
+	#  endif
+	# endif
+	# undef __GENTOO_HAS_FEATURE
+	# undef __GENTOO_NOT_FREESTANDING
+	#endif
+	EOF
+
+	# TODO: Maybe -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_FAST for
+	# non-hardened?
+	if use hardened ; then
+		cat >> "${ED}/etc/clang/gentoo-hardened.cfg" <<-EOF || die
+			# Options below are conditional on USE=hardened.
+			-Xarch_host -D_GLIBCXX_ASSERTIONS
+
+			# Analogue to GLIBCXX_ASSERTIONS
+			# https://libcxx.llvm.org/UsingLibcxx.html#assertions-mode
+			# https://libcxx.llvm.org/Hardening.html#using-hardened-mode
+			-Xarch_host -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE
+		EOF
+
+		cat >> "${ED}/etc/clang/gentoo-hardened-ld.cfg" <<-EOF || die
+			# Options below are conditional on USE=hardened.
+		EOF
+	fi
+
+	# We only install config files for supported ABIs because unprefixed tools
+	# might be used for crosscompilation where e.g. PIE may not be supported.
+	# See bug #912237 and bug #901247. Just ${CHOST} won't do due to bug #912685.
+	local abi
+	for abi in $(get_all_abis); do
+		local abi_chost=$(get_abi_CHOST "${abi}")
+		doclang_cfg "${abi_chost}"
+	done
+
+	if use kernel_Darwin; then
+		cat >> "${ED}/etc/clang/gentoo-common.cfg" <<-EOF || die
+			# Gentoo Prefix on Darwin
+			-Wl,-search_paths_first
+			-Wl,-rpath,${EPREFIX}/usr/lib
+			-L ${EPREFIX}/usr/lib
+			-isystem ${EPREFIX}/usr/include
+			-isysroot ${EPREFIX}/MacOSX.sdk
+		EOF
+		if use bootstrap-prefix ; then
+			# bootstrap-prefix is only set during stage2 of bootstrapping
+			# Prefix, where EPREFIX is set to EPREFIX/tmp.
+			# Here we need to point it at the future lib dir of the stage3's
+			# EPREFIX.
+			cat >> "${ED}/etc/clang/gentoo-common.cfg" <<-EOF || die
+				-Wl,-rpath,${EPREFIX}/../usr/lib
+			EOF
+		fi
+	fi
+}
+
+pkg_preinst() {
+	if has_version -b sys-devel/gcc-config && has_version sys-devel/gcc
+	then
+		local gcc_path=$(gcc-config --get-lib-path 2>/dev/null)
+		if [[ -n ${gcc_path} ]]; then
+			cat >> "${ED}/etc/clang/gentoo-gcc-install.cfg" <<-EOF
+				--gcc-install-dir="${gcc_path%%:*}"
+			EOF
+		fi
+	fi
+}
diff --git a/sys-devel/clang-runtime/Manifest b/sys-devel/clang-runtime/Manifest
index 978724ba3f30..9966a6e58117 100644
--- a/sys-devel/clang-runtime/Manifest
+++ b/sys-devel/clang-runtime/Manifest
@@ -5,4 +5,5 @@ EBUILD clang-runtime-18.1.8.ebuild 1448 BLAKE2B be376aab09a0268444784d1a0bcb5902
 EBUILD clang-runtime-19.1.0_rc2.ebuild 1339 BLAKE2B 4a5ee8a332faf2da21256df048867b1458a5ccb2d733d00ee3788bfbc28b3daf4ce2ae2455ab03c9ebb192d964feae2cd5806b5fef23eaa9401d57b35386aa57 SHA512 fac3e259b5a7b5e105b3d5fd2f8e9a9b6236642867e4c4a67106ec999dfaf0a30a97a3905685043a0ab9f38b15b7b8a5a814a97921e37029b9d0beac7ba7085a
 EBUILD clang-runtime-20.0.0.9999.ebuild 1339 BLAKE2B 4a5ee8a332faf2da21256df048867b1458a5ccb2d733d00ee3788bfbc28b3daf4ce2ae2455ab03c9ebb192d964feae2cd5806b5fef23eaa9401d57b35386aa57 SHA512 fac3e259b5a7b5e105b3d5fd2f8e9a9b6236642867e4c4a67106ec999dfaf0a30a97a3905685043a0ab9f38b15b7b8a5a814a97921e37029b9d0beac7ba7085a
 EBUILD clang-runtime-20.0.0_pre20240808.ebuild 1339 BLAKE2B 4a5ee8a332faf2da21256df048867b1458a5ccb2d733d00ee3788bfbc28b3daf4ce2ae2455ab03c9ebb192d964feae2cd5806b5fef23eaa9401d57b35386aa57 SHA512 fac3e259b5a7b5e105b3d5fd2f8e9a9b6236642867e4c4a67106ec999dfaf0a30a97a3905685043a0ab9f38b15b7b8a5a814a97921e37029b9d0beac7ba7085a
+EBUILD clang-runtime-20.0.0_pre20240815.ebuild 1339 BLAKE2B 4a5ee8a332faf2da21256df048867b1458a5ccb2d733d00ee3788bfbc28b3daf4ce2ae2455ab03c9ebb192d964feae2cd5806b5fef23eaa9401d57b35386aa57 SHA512 fac3e259b5a7b5e105b3d5fd2f8e9a9b6236642867e4c4a67106ec999dfaf0a30a97a3905685043a0ab9f38b15b7b8a5a814a97921e37029b9d0beac7ba7085a
 MISC metadata.xml 661 BLAKE2B 24688c511713ea102b83c71d226d519981b3aee0e05ef7a56d6a80be829efd843194e45cb4fd801f0bb976b6f1976386d6a2b05d2bc907fe2aa42b22b85b7d1f SHA512 2b5ab8783c90795f2e7d1673d876048ed9745f4911fb7a860df56deac13a6dfeba4581a84562eae54eff757c45042ca3fab75c7800313ae61df9ce69780a9294
diff --git a/sys-devel/clang-runtime/clang-runtime-20.0.0_pre20240815.ebuild b/sys-devel/clang-runtime/clang-runtime-20.0.0_pre20240815.ebuild
new file mode 100644
index 000000000000..323c0b62c062
--- /dev/null
+++ b/sys-devel/clang-runtime/clang-runtime-20.0.0_pre20240815.ebuild
@@ -0,0 +1,39 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit multilib-build toolchain-funcs
+
+DESCRIPTION="Meta-ebuild for clang runtime libraries"
+HOMEPAGE="https://clang.llvm.org/"
+
+LICENSE="metapackage"
+SLOT="${PV%%.*}"
+IUSE="+compiler-rt libcxx openmp +sanitize"
+REQUIRED_USE="sanitize? ( compiler-rt )"
+
+RDEPEND="
+	compiler-rt? (
+		~sys-libs/compiler-rt-${PV}:${SLOT}[abi_x86_32(+)?,abi_x86_64(+)?]
+		sanitize? (
+			~sys-libs/compiler-rt-sanitizers-${PV}:${SLOT}[abi_x86_32(+)?,abi_x86_64(+)?]
+		)
+	)
+	libcxx? ( >=sys-libs/libcxx-${PV}[${MULTILIB_USEDEP}] )
+	openmp? ( >=sys-libs/libomp-${PV}[${MULTILIB_USEDEP}] )
+"
+
+pkg_pretend() {
+	if tc-is-clang; then
+		ewarn "You seem to be using clang as a system compiler.  As of clang-16,"
+		ewarn "upstream has turned a few warnings that commonly occur during"
+		ewarn "configure script runs into errors by default.  This causes some"
+		ewarn "configure tests to start failing, sometimes resulting in silent"
+		ewarn "breakage, missing functionality or runtime misbehavior.  It is"
+		ewarn "not yet clear whether the change will remain or be reverted."
+		ewarn
+		ewarn "For more information, please see:"
+		ewarn "https://discourse.llvm.org/t/configure-script-breakage-with-the-new-werror-implicit-function-declaration/65213"
+	fi
+}
diff --git a/sys-devel/clang/Manifest b/sys-devel/clang/Manifest
index c4cfda573760..888f74b52ff1 100644
--- a/sys-devel/clang/Manifest
+++ b/sys-devel/clang/Manifest
@@ -15,6 +15,7 @@ DIST llvm-project-18.1.8.src.tar.xz 132067260 BLAKE2B a950492f1dbfb874dff63b1ffe
 DIST llvm-project-18.1.8.src.tar.xz.sig 566 BLAKE2B 6ab0efc5b38d4483f4e32e8b85774b2edd5d88fdf29f23b88eb0b5130a7a7f0e80549612b025f927e92de4a08ff7c292cff224dbda91a5d598244e98f7ad0fbd SHA512 ddfd1e8a06756759af6cbe488c82a6d6a62ba91f3e8a0eb4cece561321824f5d165b08ed91010588790b76e19790931d2651b24dba8567e3b151d3cb43bec25b
 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-db8ef6188cbbe2125e6d60bdef77a535105772df.tar.gz 218416682 BLAKE2B 691e3881e4a60c008c6b766b51ecc856122de1f40242ff1d91ebaa12682fea0a22f84783eb930c42d196f50ba0d3b2010f9010ed73ee7e292fe78c93d6e3f324 SHA512 2dc16a603b60607cc3daee2de0126a567a78c4fff72b2fbcb94c82472bc5ec64ac354ba8592b9a643248a5bfd43b34e2a60f2751a0c9e9e28b7f895fc50a5e9d
 DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 EBUILD clang-15.0.7-r3.ebuild 12523 BLAKE2B 0e3f9d4506a1b98e96ff98ea52f8bb10f8ab4c91db2868f786bb1761a027e73708a10dce904192a9024ef5819ebf66af07ae6dcdc7186d4b2e04e8cc5978fc7a SHA512 7eeb3ab398c79d0931dedffd5c44d4f69b98b8b9717749a5d7373f6fef49fd337579ea2ab1d05e934b8e526d3f5a43a8911abeb32d956bed9c532b32cff0dbe3
 EBUILD clang-16.0.6.ebuild 12452 BLAKE2B 446a354b58fc0535b81596a9a3785a4cd5d7b7ad52a461baa3b6b7beacdc12161f62da588cd837b8b9c8f35307b1a2c885b9d01bf8edc4af1b551efaab09ebe8 SHA512 58b5694a7d28a03edd4a71e3a99b0b2678285e616cdaab82bb196f092a8726e9cd3787ab07d724680113b4f6683e89103cab2478e49a85e7b5c75a633fb1ca51
@@ -23,4 +24,5 @@ EBUILD clang-18.1.8.ebuild 12218 BLAKE2B a8508146967a2807d4bd95734fe52da8194c903
 EBUILD clang-19.1.0_rc2.ebuild 11899 BLAKE2B 4ec92be5b4185157408680503931e7bc4c50cb99320a11e2d16598cad5bf8c1f6b30a020e395d652cb2489b9252885ab5fd18672bbfd6adbb84c69a5800be6ce SHA512 a1f20ed323af7a93a9c6d277789f53cc17c9faf60e81bdee8e4e754a52da46cbfa79fde093aea023b83b4f4d3c93add7b170e4af32e65e869e04e4d48204f898
 EBUILD clang-20.0.0.9999.ebuild 11943 BLAKE2B a186ad2e553c9fe1f76a659a1bb8d015f777ef76f100d0400b18c755ebfa80380cad8426c27c69255531b2a321b1bd62ea7a22301616133442604398c92c136c SHA512 2f2a4f0dd70bbeffc174a1213733dddfaaf34b5ef247fde9bd4248361d3561227a66ff10aa87ff0a627ac472bea36455ddba50387ebd5d3fdd7e50d4fd751995
 EBUILD clang-20.0.0_pre20240808.ebuild 11943 BLAKE2B a186ad2e553c9fe1f76a659a1bb8d015f777ef76f100d0400b18c755ebfa80380cad8426c27c69255531b2a321b1bd62ea7a22301616133442604398c92c136c SHA512 2f2a4f0dd70bbeffc174a1213733dddfaaf34b5ef247fde9bd4248361d3561227a66ff10aa87ff0a627ac472bea36455ddba50387ebd5d3fdd7e50d4fd751995
+EBUILD clang-20.0.0_pre20240815.ebuild 11943 BLAKE2B a186ad2e553c9fe1f76a659a1bb8d015f777ef76f100d0400b18c755ebfa80380cad8426c27c69255531b2a321b1bd62ea7a22301616133442604398c92c136c SHA512 2f2a4f0dd70bbeffc174a1213733dddfaaf34b5ef247fde9bd4248361d3561227a66ff10aa87ff0a627ac472bea36455ddba50387ebd5d3fdd7e50d4fd751995
 MISC metadata.xml 1318 BLAKE2B 704c1a64297b25da1b2e0eec23cbdf4791273da1babf23292160b6163d43438e62fe214df7afa09232893599951918440954c17a9bfa0c6f829a7d706f564192 SHA512 4677ad146739dd41e025a2335eec353a3d35ac8db7482948fee611566d84b41c4e6bdd75bc3d78f8933d4d9818a36bf222e1aa89e52f945501ff918479fea3b6
diff --git a/sys-devel/clang/clang-20.0.0_pre20240815.ebuild b/sys-devel/clang/clang-20.0.0_pre20240815.ebuild
new file mode 100644
index 000000000000..857f7b1ed5a2
--- /dev/null
+++ b/sys-devel/clang/clang-20.0.0_pre20240815.ebuild
@@ -0,0 +1,471 @@
+# 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 llvm.org llvm-utils multilib multilib-minimal
+inherit prefix python-single-r1 toolchain-funcs
+
+DESCRIPTION="C language family frontend for LLVM"
+HOMEPAGE="https://llvm.org/"
+
+# MSVCSetupApi.h: MIT
+# sorttable.js: MIT
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA MIT"
+SLOT="${LLVM_MAJOR}/${LLVM_SOABI}"
+IUSE="+debug doc +extra ieee-long-double +pie +static-analyzer test xml"
+REQUIRED_USE="${PYTHON_REQUIRED_USE}"
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	~sys-devel/llvm-${PV}:${LLVM_MAJOR}=[debug=,${MULTILIB_USEDEP}]
+	static-analyzer? ( dev-lang/perl:* )
+	xml? ( dev-libs/libxml2:2=[${MULTILIB_USEDEP}] )
+"
+
+RDEPEND="
+	${PYTHON_DEPS}
+	${DEPEND}
+	>=sys-devel/clang-common-${PV}
+"
+BDEPEND="
+	${PYTHON_DEPS}
+	test? ( ~sys-devel/lld-${PV} )
+	xml? ( virtual/pkgconfig )
+"
+PDEPEND="
+	~sys-devel/clang-runtime-${PV}
+	sys-devel/clang-toolchain-symlinks:${LLVM_MAJOR}
+"
+
+LLVM_COMPONENTS=(
+	clang clang-tools-extra cmake
+)
+LLVM_MANPAGES=1
+LLVM_TEST_COMPONENTS=(
+	llvm/utils
+)
+LLVM_USE_TARGETS=llvm
+llvm.org_set_globals
+
+[[ -n ${LLVM_MANPAGE_DIST} ]] && BDEPEND+=" doc? ( "
+BDEPEND+="
+	$(python_gen_cond_dep '
+		dev-python/myst-parser[${PYTHON_USEDEP}]
+		dev-python/sphinx[${PYTHON_USEDEP}]
+	')
+"
+[[ -n ${LLVM_MANPAGE_DIST} ]] && BDEPEND+=" ) "
+
+# Multilib notes:
+# 1. ABI_* flags control ABIs libclang* is built for only.
+# 2. clang is always capable of compiling code for all ABIs for enabled
+#    target. However, you will need appropriate crt* files (installed
+#    e.g. by sys-devel/gcc and sys-libs/glibc).
+# 3. ${CHOST}-clang wrappers are always installed for all ABIs included
+#    in the current profile (i.e. alike supported by sys-devel/gcc).
+#
+# Therefore: use sys-devel/clang[${MULTILIB_USEDEP}] only if you need
+# multilib clang* libraries (not runtime, not wrappers).
+
+src_prepare() {
+	# create extra parent dir for relative CLANG_RESOURCE_DIR access
+	mkdir -p x/y || die
+	BUILD_DIR=${WORKDIR}/x/y/clang
+
+	llvm.org_src_prepare
+
+	# add Gentoo Portage Prefix for Darwin (see prefix-dirs.patch)
+	eprefixify \
+		lib/Lex/InitHeaderSearch.cpp \
+		lib/Driver/ToolChains/Darwin.cpp || die
+
+	if ! use prefix-guest && [[ -n ${EPREFIX} ]]; then
+		sed -i "/LibDir.*Loader/s@return \"\/\"@return \"${EPREFIX}/\"@" lib/Driver/ToolChains/Linux.cpp || die
+	fi
+}
+
+check_distribution_components() {
+	if [[ ${CMAKE_MAKEFILE_GENERATOR} == ninja ]]; then
+		local all_targets=() my_targets=() l
+		cd "${BUILD_DIR}" || die
+
+		while read -r l; do
+			if [[ ${l} == install-*-stripped:* ]]; then
+				l=${l#install-}
+				l=${l%%-stripped*}
+
+				case ${l} in
+					# meta-targets
+					clang-libraries|distribution)
+						continue
+						;;
+					# tools
+					clang|clangd|clang-*)
+						;;
+					# static libraries
+					clang*|findAllSymbols)
+						continue
+						;;
+					# conditional to USE=doc
+					docs-clang-html|docs-clang-tools-html)
+						use doc || continue
+						;;
+				esac
+
+				all_targets+=( "${l}" )
+			fi
+		done < <(${NINJA} -t targets all)
+
+		while read -r l; do
+			my_targets+=( "${l}" )
+		done < <(get_distribution_components $"\n")
+
+		local add=() remove=()
+		for l in "${all_targets[@]}"; do
+			if ! has "${l}" "${my_targets[@]}"; then
+				add+=( "${l}" )
+			fi
+		done
+		for l in "${my_targets[@]}"; do
+			if ! has "${l}" "${all_targets[@]}"; then
+				remove+=( "${l}" )
+			fi
+		done
+
+		if [[ ${#add[@]} -gt 0 || ${#remove[@]} -gt 0 ]]; then
+			eerror "get_distribution_components() is outdated!"
+			eerror "   Add: ${add[*]}"
+			eerror "Remove: ${remove[*]}"
+			die "Update get_distribution_components()!"
+		fi
+		cd - >/dev/null || die
+	fi
+}
+
+get_distribution_components() {
+	local sep=${1-;}
+
+	local out=(
+		# common stuff
+		clang-cmake-exports
+		clang-headers
+		clang-resource-headers
+		libclang-headers
+
+		aarch64-resource-headers
+		arm-common-resource-headers
+		arm-resource-headers
+		core-resource-headers
+		cuda-resource-headers
+		hexagon-resource-headers
+		hip-resource-headers
+		hlsl-resource-headers
+		mips-resource-headers
+		opencl-resource-headers
+		openmp-resource-headers
+		ppc-htm-resource-headers
+		ppc-resource-headers
+		riscv-resource-headers
+		systemz-resource-headers
+		utility-resource-headers
+		ve-resource-headers
+		webassembly-resource-headers
+		windows-resource-headers
+		x86-resource-headers
+
+		# libs
+		clang-cpp
+		libclang
+	)
+
+	if multilib_is_native_abi; then
+		out+=(
+			# common stuff
+			bash-autocomplete
+			libclang-python-bindings
+
+			# tools
+			amdgpu-arch
+			c-index-test
+			clang
+			clang-format
+			clang-installapi
+			clang-linker-wrapper
+			clang-nvlink-wrapper
+			clang-offload-bundler
+			clang-offload-packager
+			clang-refactor
+			clang-repl
+			clang-rename
+			clang-scan-deps
+			diagtool
+			hmaptool
+			nvptx-arch
+
+			# needed for cross-compiling Clang
+			clang-tblgen
+		)
+
+		if use extra; then
+			out+=(
+				# extra tools
+				clang-apply-replacements
+				clang-change-namespace
+				clang-doc
+				clang-include-cleaner
+				clang-include-fixer
+				clang-move
+				clang-pseudo
+				clang-query
+				clang-reorder-fields
+				clang-tidy
+				clang-tidy-headers
+				clangd
+				find-all-symbols
+				modularize
+				pp-trace
+			)
+		fi
+
+		if llvm_are_manpages_built; then
+			out+=( docs-clang-man )
+			use extra && out+=( docs-clang-tools-man )
+		fi
+
+		if use doc; then
+			out+=( docs-clang-html )
+			use extra && out+=( docs-clang-tools-html )
+		fi
+
+		use static-analyzer && out+=(
+			clang-check
+			clang-extdef-mapping
+			scan-build
+			scan-build-py
+			scan-view
+		)
+	fi
+
+	printf "%s${sep}" "${out[@]}"
+}
+
+multilib_src_configure() {
+	llvm_prepend_path "${LLVM_MAJOR}"
+
+	local mycmakeargs=(
+		-DDEFAULT_SYSROOT=$(usex prefix-guest "" "${EPREFIX}")
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}"
+		-DCMAKE_INSTALL_MANDIR="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/share/man"
+		-DCLANG_CONFIG_FILE_SYSTEM_DIR="${EPREFIX}/etc/clang"
+		# relative to bindir
+		-DCLANG_RESOURCE_DIR="../../../../lib/clang/${LLVM_MAJOR}"
+
+		-DBUILD_SHARED_LIBS=OFF
+		-DCLANG_LINK_CLANG_DYLIB=ON
+		-DLLVM_DISTRIBUTION_COMPONENTS=$(get_distribution_components)
+		-DCLANG_INCLUDE_TESTS=$(usex test)
+
+		-DLLVM_TARGETS_TO_BUILD="${LLVM_TARGETS// /;}"
+
+		# these are not propagated reliably, so redefine them
+		-DLLVM_ENABLE_EH=ON
+		-DLLVM_ENABLE_RTTI=ON
+
+		# libgomp support fails to find headers without explicit -I
+		# furthermore, it provides only syntax checking
+		-DCLANG_DEFAULT_OPENMP_RUNTIME=libomp
+
+		-DCLANG_DEFAULT_PIE_ON_LINUX=$(usex pie)
+
+		-DCLANG_ENABLE_LIBXML2=$(usex xml)
+		-DCLANG_ENABLE_ARCMT=$(usex static-analyzer)
+		-DCLANG_ENABLE_STATIC_ANALYZER=$(usex static-analyzer)
+		# TODO: CLANG_ENABLE_HLSL?
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+
+	if ! use elibc_musl; then
+		mycmakeargs+=(
+			-DPPC_LINUX_DEFAULT_IEEELONGDOUBLE=$(usex ieee-long-double)
+		)
+	fi
+
+	use test && mycmakeargs+=(
+		-DLLVM_BUILD_TESTS=ON
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+	)
+
+	if multilib_is_native_abi; then
+		local build_docs=OFF
+		if llvm_are_manpages_built; then
+			build_docs=ON
+			mycmakeargs+=(
+				-DLLVM_BUILD_DOCS=ON
+				-DLLVM_ENABLE_SPHINX=ON
+				-DCLANG_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/html"
+				-DSPHINX_WARNINGS_AS_ERRORS=OFF
+			)
+			if use extra; then
+				mycmakeargs+=(
+					-DCLANG-TOOLS_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/tools-extra"
+				)
+			fi
+		fi
+		mycmakeargs+=(
+			-DCLANG_INCLUDE_DOCS=${build_docs}
+		)
+	fi
+	if multilib_native_use extra; then
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_CLANG_TOOLS_EXTRA_SOURCE_DIR="${WORKDIR}"/clang-tools-extra
+			-DCLANG_TOOLS_EXTRA_INCLUDE_DOCS=${build_docs}
+		)
+	else
+		mycmakeargs+=(
+			-DLLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD=OFF
+		)
+	fi
+
+	if [[ -n ${EPREFIX} ]]; then
+		mycmakeargs+=(
+			-DGCC_INSTALL_PREFIX="${EPREFIX}/usr"
+		)
+	fi
+
+	if tc-is-cross-compiler; then
+		has_version -b sys-devel/clang:${LLVM_MAJOR} ||
+			die "sys-devel/clang:${LLVM_MAJOR} is required on the build host."
+		local tools_bin=${BROOT}/usr/lib/llvm/${LLVM_MAJOR}/bin
+		mycmakeargs+=(
+			-DLLVM_TOOLS_BINARY_DIR="${tools_bin}"
+			-DCLANG_TABLEGEN="${tools_bin}"/clang-tblgen
+		)
+	fi
+
+	# LLVM can have very high memory consumption while linking,
+	# exhausting the limit on 32-bit linker executable
+	use x86 && local -x LDFLAGS="${LDFLAGS} -Wl,--no-keep-memory"
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+	cmake_src_configure
+
+	multilib_is_native_abi && check_distribution_components
+}
+
+multilib_src_compile() {
+	cmake_build distribution
+}
+
+multilib_src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	local test_targets=( check-clang )
+	if multilib_native_use extra; then
+		test_targets+=(
+			check-clang-tools
+			check-clangd
+		)
+	fi
+	cmake_build "${test_targets[@]}"
+}
+
+src_install() {
+	MULTILIB_WRAPPED_HEADERS=(
+		/usr/include/clang/Config/config.h
+	)
+
+	multilib-minimal_src_install
+
+	# Move runtime headers to /usr/lib/clang, where they belong
+	mv "${ED}"/usr/include/clangrt "${ED}"/usr/lib/clang || die
+	# move (remaining) wrapped headers back
+	if use extra; then
+		mv "${T}"/clang-tidy "${ED}"/usr/include/ || die
+	fi
+	mv "${ED}"/usr/include "${ED}"/usr/lib/llvm/${LLVM_MAJOR}/include || die
+
+	# Apply CHOST and version suffix to clang tools
+	local clang_tools=( clang clang++ clang-cl clang-cpp )
+	local abi i
+
+	# cmake gives us:
+	# - clang-X
+	# - clang -> clang-X
+	# - clang++, clang-cl, clang-cpp -> clang
+	# we want to have:
+	# - clang-X
+	# - clang++-X, clang-cl-X, clang-cpp-X -> clang-X
+	# - clang, clang++, clang-cl, clang-cpp -> clang*-X
+	# also in CHOST variant
+	for i in "${clang_tools[@]:1}"; do
+		rm "${ED}/usr/lib/llvm/${LLVM_MAJOR}/bin/${i}" || die
+		dosym "clang-${LLVM_MAJOR}" "/usr/lib/llvm/${LLVM_MAJOR}/bin/${i}-${LLVM_MAJOR}"
+		dosym "${i}-${LLVM_MAJOR}" "/usr/lib/llvm/${LLVM_MAJOR}/bin/${i}"
+	done
+
+	# now create target symlinks for all supported ABIs
+	for abi in $(get_all_abis); do
+		local abi_chost=$(get_abi_CHOST "${abi}")
+		for i in "${clang_tools[@]}"; do
+			dosym "${i}-${LLVM_MAJOR}" \
+				"/usr/lib/llvm/${LLVM_MAJOR}/bin/${abi_chost}-${i}-${LLVM_MAJOR}"
+			dosym "${abi_chost}-${i}-${LLVM_MAJOR}" \
+				"/usr/lib/llvm/${LLVM_MAJOR}/bin/${abi_chost}-${i}"
+		done
+	done
+}
+
+multilib_src_install() {
+	DESTDIR=${D} cmake_build install-distribution
+
+	# move headers to /usr/include for wrapping & ABI mismatch checks
+	# (also drop the version suffix from runtime headers)
+	rm -rf "${ED}"/usr/include || die
+	mv "${ED}"/usr/lib/llvm/${LLVM_MAJOR}/include "${ED}"/usr/include || die
+	mv "${ED}"/usr/lib/clang "${ED}"/usr/include/clangrt || die
+	if multilib_native_use extra; then
+		# don't wrap clang-tidy headers, the list is too long
+		# (they're fine for non-native ABI but enabling the targets is problematic)
+		mv "${ED}"/usr/include/clang-tidy "${T}/" || die
+	fi
+}
+
+multilib_src_install_all() {
+	python_fix_shebang "${ED}"
+	if use static-analyzer; then
+		python_optimize "${ED}"/usr/lib/llvm/${LLVM_MAJOR}/share/scan-view
+	fi
+
+	docompress "/usr/lib/llvm/${LLVM_MAJOR}/share/man"
+	llvm_install_manpages
+	# match 'html' non-compression
+	use doc && docompress -x "/usr/share/doc/${PF}/tools-extra"
+	# +x for some reason; TODO: investigate
+	use static-analyzer && fperms a-x "/usr/lib/llvm/${LLVM_MAJOR}/share/man/man1/scan-build.1"
+}
+
+pkg_postinst() {
+	if [[ -z ${ROOT} && -f ${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
+		eselect compiler-shadow update all
+	fi
+
+	elog "You can find additional utility scripts in:"
+	elog "  ${EROOT}/usr/lib/llvm/${LLVM_MAJOR}/share/clang"
+	if use extra; then
+		elog "Some of them are vim integration scripts (with instructions inside)."
+		elog "The run-clang-tidy.py script requires the following additional package:"
+		elog "  dev-python/pyyaml"
+	fi
+}
+
+pkg_postrm() {
+	if [[ -z ${ROOT} && -f ${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
+		eselect compiler-shadow clean all
+	fi
+}
diff --git a/sys-devel/gcc/Manifest b/sys-devel/gcc/Manifest
index e6cbf269f1e8..f11fe71dbf5e 100644
--- a/sys-devel/gcc/Manifest
+++ b/sys-devel/gcc/Manifest
@@ -13,6 +13,7 @@ DIST gcc-12-20240711.tar.xz 79899144 BLAKE2B e1dad8f14ac0413c31ebb516551ef6891c4
 DIST gcc-12-20240725.tar.xz 79899056 BLAKE2B 299edcf3a8fa35f15bcc850a5fd3be12c2d0e464ea8d78454333a3462d182be61923e38fe1ead5ca0e8d647941e897e4c3e37f03cf80e9aeedc32370bdf12f25 SHA512 6169e54e6e4c7017d7b9138fef341387a1fc8e3634b974364daef7bdff5809d0156012e25bfb533e255b0f3198aae7c667321bc11ac9ad71302f06be5b31c6b2
 DIST gcc-12-20240801.tar.xz 79883084 BLAKE2B 9b50ef282b5d55b2c477e5edd83c70076e0fe81c533d15bb9e8a4ac2b53c855f2aac80774b6944e843c6433294fc1b6ff96d7f754c78f60623dc1068c5e0e844 SHA512 57699fe4749558e2116e38e6d3dd2427a790969789f7d510225a8306e601a5ef07ca0609ba948c79d540b52c51d29abadbb0195d66f709505d7b685fd11b3e1d
 DIST gcc-12-20240808.tar.xz 79911312 BLAKE2B a4958a9980e043d295df7ac75d4f0ac594b012e756133f20cc99a510d288f0be1b253e10c6ee08da36c881cce1bb545ce028ca2d65ba2e180672c09c377a9553 SHA512 ad57e71315ac4061b528a0ef6217298d545f7b48d1e73c9b543a7594c48bddf61098227aa0ad889aafb80f2532ce26d4a74b24a84c4cfa52e075415c0a512508
+DIST gcc-12-20240815.tar.xz 79901552 BLAKE2B 5607c6e801b2defbd7f41d37c262e0fcf8562615c755fd34ddd91fdaf27811587e30ad8428a0fe6185f5a3d16382f40164a1f2be4eead5b9993514949afdb349 SHA512 68703cb8f3bb2f81c048bbe514e1e6669172ceea06ea4db02a3e97f6d51d9924d68898b0f4bdb6d383beb619e0e537bb57c9c4b3cd69fdb1e55173bb363af060
 DIST gcc-12.3.0-musl-patches-1.tar.xz 3572 BLAKE2B c7bf65f7c9ea8023ddaac821ee2b778622fa310ac72a72b2f7032494a8f304eac86217f9204622e6c21aaef9952bece0d09bc126facd4f42b602927909815ab5 SHA512 babc279fea2c1fd4c018815f2f5630214fd46015ce9f365c28af242681d51818eaca30ce298eddcab1eed5ac5f2759e2b47b2335afab9d722b4469a6d4fec326
 DIST gcc-12.3.0-patches-3.tar.xz 14852 BLAKE2B 7a5f1f43063b15f424099afd72096212fbbbc5151ff01f2de15dfb6e7cf274981c8cfaedba9ef61576c9096fb172fc550a7deb5cd7d9366fd249fd5dd3951f76 SHA512 aa89e4c2ae02f4fb42229ad5167f2eaa3a8fae51118645bf07199fe2124b9c83948590662b053d08002ef709fa870ea88315fd4ccbe4441a74e9cb62edcb82fb
 DIST gcc-12.4.0.tar.xz 83377372 BLAKE2B 0d5aa9995bf53fa2dc976a846240cfb8fafd125ad6c54f45dc9d770215eae3e9ea0db82a9a4f79c51b4d5f8461a1d730c17db6841bc31bd96dba11d9ed7544ae SHA512 5bd29402cad2deb5d9388d0236c7146414d77e5b8d5f1c6c941c7a1f47691c3389f08656d5f6e8e2d6717bf2c81f018d326f632fb468f42925b40bd217fc4853
@@ -68,6 +69,7 @@ EBUILD gcc-12.4.1_p20240711.ebuild 1608 BLAKE2B 236a5a5573a0a0a6a1da316f33eca0e5
 EBUILD gcc-12.4.1_p20240725.ebuild 1608 BLAKE2B 236a5a5573a0a0a6a1da316f33eca0e572201ef02a6de02831e26a832121cff91af62a7d6a58cae3cf56f7e925b89bdf76ee4e24a8d3e894612b00d662fbb513 SHA512 6a4aa46da76b1d2501fc5937d14658ac44efb5981b6d30ba25a88a84879e7a3a4d00370a541be4974bdb881b0c2238f61459dbe8f6295e32fdb391bd70a6e4d4
 EBUILD gcc-12.4.1_p20240801.ebuild 1608 BLAKE2B 236a5a5573a0a0a6a1da316f33eca0e572201ef02a6de02831e26a832121cff91af62a7d6a58cae3cf56f7e925b89bdf76ee4e24a8d3e894612b00d662fbb513 SHA512 6a4aa46da76b1d2501fc5937d14658ac44efb5981b6d30ba25a88a84879e7a3a4d00370a541be4974bdb881b0c2238f61459dbe8f6295e32fdb391bd70a6e4d4
 EBUILD gcc-12.4.1_p20240808.ebuild 1608 BLAKE2B 236a5a5573a0a0a6a1da316f33eca0e572201ef02a6de02831e26a832121cff91af62a7d6a58cae3cf56f7e925b89bdf76ee4e24a8d3e894612b00d662fbb513 SHA512 6a4aa46da76b1d2501fc5937d14658ac44efb5981b6d30ba25a88a84879e7a3a4d00370a541be4974bdb881b0c2238f61459dbe8f6295e32fdb391bd70a6e4d4
+EBUILD gcc-12.4.1_p20240815.ebuild 1608 BLAKE2B 236a5a5573a0a0a6a1da316f33eca0e572201ef02a6de02831e26a832121cff91af62a7d6a58cae3cf56f7e925b89bdf76ee4e24a8d3e894612b00d662fbb513 SHA512 6a4aa46da76b1d2501fc5937d14658ac44efb5981b6d30ba25a88a84879e7a3a4d00370a541be4974bdb881b0c2238f61459dbe8f6295e32fdb391bd70a6e4d4
 EBUILD gcc-12.5.9999.ebuild 1576 BLAKE2B 130ad8310161a8edc11cee748b8ef25c01c6979250f60b75d5e937c644196447f3f14413530e616643321478d7925b17f3c1a3a721a6a237e79b1bbaef512c55 SHA512 a29e571fef4955a146e5ffe79596d24c8780bddf9af4fbb5ca2d18ca1fc17dd2a4a40a08c5eb7a6e15b77a2efb4352d6fd44972e62e7914d192e6ff48b555a77
 EBUILD gcc-13.2.0.ebuild 1666 BLAKE2B fa7667d2e80c162e51091525ddb73bb4ced21bff0c797c0b5993742a4dd5764963f40c3d205fc674187d1cb7cd3ca32a1519ed2fb37450743356eb096d36e914 SHA512 4519c19ecf26ba9af0270c70fcc3360b595aaabf037717a17fe1e250962363902328756fab02705c7392207541fa262c3e7b3d4887d69dac3143a6a4f129b17d
 EBUILD gcc-13.2.1_p20240210.ebuild 1659 BLAKE2B da731616a58d94bf5d5c8dbe354ab411f093ef8630ea3f71b5c81f4ab5db977a755ec2e1ae29118d2fb39b2257e791c9e4363a9dd08eba10d0588cb8f29482a4 SHA512 f61ba946cbfae240ec59a5d61eb5f10409819cec75abb792a017a0452d7c8b19da810d437796cf47bb71c5d05c1a964ea40083d8946bf938008fb99e63d4a3b5
diff --git a/sys-devel/gcc/gcc-12.4.1_p20240815.ebuild b/sys-devel/gcc/gcc-12.4.1_p20240815.ebuild
new file mode 100644
index 000000000000..e645c4d53b77
--- /dev/null
+++ b/sys-devel/gcc/gcc-12.4.1_p20240815.ebuild
@@ -0,0 +1,64 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+TOOLCHAIN_PATCH_DEV="sam"
+PATCH_GCC_VER="12.3.0"
+PATCH_VER="3"
+MUSL_VER="1"
+MUSL_GCC_VER="12.3.0"
+PYTHON_COMPAT=( python3_{10..12} )
+
+if [[ ${PV} == *.9999 ]] ; then
+	MY_PV_2=$(ver_cut 2)
+	MY_PV_3=1
+	if [[ ${MY_PV_2} == 0 ]] ; then
+		MY_PV_2=0
+		MY_PV_3=0
+	else
+	        MY_PV_2=$((${MY_PV_2} - 1))
+	fi
+
+	# e.g. 12.2.9999 -> 12.1.1
+	TOOLCHAIN_GCC_PV=$(ver_cut 1).${MY_PV_2}.${MY_PV_3}
+elif [[ -n ${TOOLCHAIN_GCC_RC} ]] ; then
+	# Cheesy hack for RCs
+	MY_PV=$(ver_cut 1).$((($(ver_cut 2) + 1))).$((($(ver_cut 3) - 1)))-RC-$(ver_cut 5)
+	MY_P=${PN}-${MY_PV}
+	GCC_TARBALL_SRC_URI="mirror://gcc/snapshots/${MY_PV}/${MY_P}.tar.xz"
+	TOOLCHAIN_SET_S=no
+	S="${WORKDIR}"/${MY_P}
+fi
+
+inherit toolchain
+
+if tc_is_live ; then
+	# Needs to be after inherit (for now?), bug #830908
+	EGIT_BRANCH=releases/gcc-$(ver_cut 1)
+elif [[ -z ${TOOLCHAIN_USE_GIT_PATCHES} ]] ; then
+	# Don't keyword live ebuilds
+	#KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+	:;
+fi
+
+if [[ ${CATEGORY} != cross-* ]] ; then
+	# Technically only if USE=hardened *too* right now, but no point in complicating it further.
+	# If GCC is enabling CET by default, we need glibc to be built with support for it.
+	# bug #830454
+	RDEPEND="elibc_glibc? ( sys-libs/glibc[cet(-)?] )"
+	DEPEND="${RDEPEND}"
+fi
+
+src_prepare() {
+	local p upstreamed_patches=(
+		# add them here
+	)
+	for p in "${upstreamed_patches[@]}"; do
+		rm -v "${WORKDIR}/patch/${p}" || die
+	done
+
+	toolchain_src_prepare
+
+	eapply_user
+}
diff --git a/sys-devel/lld/Manifest b/sys-devel/lld/Manifest
index 455fc757086a..4909c96d45b9 100644
--- a/sys-devel/lld/Manifest
+++ b/sys-devel/lld/Manifest
@@ -9,6 +9,7 @@ DIST llvm-project-18.1.8.src.tar.xz 132067260 BLAKE2B a950492f1dbfb874dff63b1ffe
 DIST llvm-project-18.1.8.src.tar.xz.sig 566 BLAKE2B 6ab0efc5b38d4483f4e32e8b85774b2edd5d88fdf29f23b88eb0b5130a7a7f0e80549612b025f927e92de4a08ff7c292cff224dbda91a5d598244e98f7ad0fbd SHA512 ddfd1e8a06756759af6cbe488c82a6d6a62ba91f3e8a0eb4cece561321824f5d165b08ed91010588790b76e19790931d2651b24dba8567e3b151d3cb43bec25b
 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-db8ef6188cbbe2125e6d60bdef77a535105772df.tar.gz 218416682 BLAKE2B 691e3881e4a60c008c6b766b51ecc856122de1f40242ff1d91ebaa12682fea0a22f84783eb930c42d196f50ba0d3b2010f9010ed73ee7e292fe78c93d6e3f324 SHA512 2dc16a603b60607cc3daee2de0126a567a78c4fff72b2fbcb94c82472bc5ec64ac354ba8592b9a643248a5bfd43b34e2a60f2751a0c9e9e28b7f895fc50a5e9d
 DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 EBUILD lld-15.0.7.ebuild 2269 BLAKE2B 322d5608e3acfb87bfb720646404ed405a3113c4faf1059428663a50d5566d7842fcff57ccf3aeb5e97b1a9acd4efd862db2368f130e088944ef4f0faf3c90f8 SHA512 e50d1d99fe18b6aba57c06eb6853f3212be1f7b7f2f3c70dcd226a69a4defc753eafcce77eb74f30eaa31b010fa094738718c1cdb23e584ef6e33eb72e536719
 EBUILD lld-16.0.6.ebuild 2324 BLAKE2B 9b849aea16a8188e4da4cfcf0c85fb3e997007e1287ec062aee182c7955c7bc78132e761c2611198c7207283fbe930fbee6bdc9a39b922d6d5387bedadaf1b76 SHA512 a7c3d4c1508e5435ba9f6250c6b2fd3157fb4f2c205a6888736f79fa739c59eec3e901927b53af81de3a3c6d4fa5d576be3eaa6ad45c60e5d952ed4ad9706c2f
@@ -17,4 +18,5 @@ EBUILD lld-18.1.8.ebuild 2366 BLAKE2B ad9fa5a3af2791ba8f4d976a9f132d1546d75ea8a1
 EBUILD lld-19.1.0_rc2.ebuild 2293 BLAKE2B 5825f0a471a50ec1d9e7775a82736f6369fa1e99904b30cf068f0092dce44d4e0c2e76fcb21d70b9ecb1756d19e8482a5ac940bdc25c5a1d58c9aee0c21b5d7b SHA512 86226e5f9aea8a87b022b2def7cef707fc7db0f1e026f4965ec64390708f7e2355c3e1ee991487bd0c6f9f17dc2f129a6b7a2b8abbf1e14fe48dd0e4cd73b1fa
 EBUILD lld-20.0.0.9999.ebuild 2293 BLAKE2B 5825f0a471a50ec1d9e7775a82736f6369fa1e99904b30cf068f0092dce44d4e0c2e76fcb21d70b9ecb1756d19e8482a5ac940bdc25c5a1d58c9aee0c21b5d7b SHA512 86226e5f9aea8a87b022b2def7cef707fc7db0f1e026f4965ec64390708f7e2355c3e1ee991487bd0c6f9f17dc2f129a6b7a2b8abbf1e14fe48dd0e4cd73b1fa
 EBUILD lld-20.0.0_pre20240808.ebuild 2293 BLAKE2B 5825f0a471a50ec1d9e7775a82736f6369fa1e99904b30cf068f0092dce44d4e0c2e76fcb21d70b9ecb1756d19e8482a5ac940bdc25c5a1d58c9aee0c21b5d7b SHA512 86226e5f9aea8a87b022b2def7cef707fc7db0f1e026f4965ec64390708f7e2355c3e1ee991487bd0c6f9f17dc2f129a6b7a2b8abbf1e14fe48dd0e4cd73b1fa
+EBUILD lld-20.0.0_pre20240815.ebuild 2293 BLAKE2B 5825f0a471a50ec1d9e7775a82736f6369fa1e99904b30cf068f0092dce44d4e0c2e76fcb21d70b9ecb1756d19e8482a5ac940bdc25c5a1d58c9aee0c21b5d7b SHA512 86226e5f9aea8a87b022b2def7cef707fc7db0f1e026f4965ec64390708f7e2355c3e1ee991487bd0c6f9f17dc2f129a6b7a2b8abbf1e14fe48dd0e4cd73b1fa
 MISC metadata.xml 299 BLAKE2B 2feead2cd1b35b3a43335ddd7711f8181b52bc63ee7166608914260c67528add5251349063afbef4f8cf0ec09b2cd4c3ffdd90f2c14ed60bb69ebc03888f6333 SHA512 cd745c54ab18d25bdaff18582105072574103a36cfe7c175ef740f266d00e9fc6f44c332904d23b911c939cf5bdf52973b388923099d8dd5dfef3c283b5cb685
diff --git a/sys-devel/lld/lld-20.0.0_pre20240815.ebuild b/sys-devel/lld/lld-20.0.0_pre20240815.ebuild
new file mode 100644
index 000000000000..79558afa1abe
--- /dev/null
+++ b/sys-devel/lld/lld-20.0.0_pre20240815.ebuild
@@ -0,0 +1,93 @@
+# 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 flag-o-matic llvm.org llvm-utils python-any-r1 toolchain-funcs
+
+DESCRIPTION="The LLVM linker (link editor)"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="${LLVM_MAJOR}/${LLVM_SOABI}"
+IUSE="+debug test zstd"
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	~sys-devel/llvm-${PV}[debug=,zstd=]
+	sys-libs/zlib:=
+	zstd? ( app-arch/zstd:= )
+"
+RDEPEND="
+	${DEPEND}
+	!sys-devel/lld:0
+"
+BDEPEND="
+	sys-devel/llvm:${LLVM_MAJOR}
+	test? (
+		$(python_gen_any_dep ">=dev-python/lit-${PV}[\${PYTHON_USEDEP}]")
+	)
+"
+PDEPEND="
+	>=sys-devel/lld-toolchain-symlinks-16-r2:${LLVM_MAJOR}
+"
+
+LLVM_COMPONENTS=( lld cmake libunwind/include/mach-o )
+llvm.org_set_globals
+
+python_check_deps() {
+	python_has_version ">=dev-python/lit-${PV}[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	use test && python-any-r1_pkg_setup
+}
+
+src_unpack() {
+	llvm.org_src_unpack
+
+	# Directory ${WORKDIR}/llvm does not exist with USE="-test",
+	# but LLVM_MAIN_SRC_DIR="${WORKDIR}/llvm" is set below,
+	# and ${LLVM_MAIN_SRC_DIR}/../libunwind/include is used by build system
+	# (lld/MachO/CMakeLists.txt) and is expected to be resolvable
+	# to existent directory ${WORKDIR}/libunwind/include.
+	mkdir -p "${WORKDIR}/llvm" || die
+}
+
+src_configure() {
+	llvm_prepend_path "${LLVM_MAJOR}"
+
+	# ODR violations (https://github.com/llvm/llvm-project/issues/83529, bug #922353)
+	filter-lto
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+
+	use elibc_musl && append-ldflags -Wl,-z,stack-size=2097152
+
+	local mycmakeargs=(
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}"
+		-DBUILD_SHARED_LIBS=ON
+		-DLLVM_INCLUDE_TESTS=$(usex test)
+		-DLLVM_ENABLE_ZLIB=FORCE_ON
+		-DLLVM_ENABLE_ZSTD=$(usex zstd FORCE_ON OFF)
+	)
+
+	use test && mycmakeargs+=(
+		-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+
+	tc-is-cross-compiler &&	mycmakeargs+=(
+		-DLLVM_TABLEGEN_EXE="${BROOT}/usr/lib/llvm/${LLVM_MAJOR}/bin/llvm-tblgen"
+	)
+
+	cmake_src_configure
+}
+
+src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-lld
+}
diff --git a/sys-devel/llvm-common/Manifest b/sys-devel/llvm-common/Manifest
index 10d33783ebb8..c4237fef566c 100644
--- a/sys-devel/llvm-common/Manifest
+++ b/sys-devel/llvm-common/Manifest
@@ -8,6 +8,7 @@ DIST llvm-project-18.1.8.src.tar.xz 132067260 BLAKE2B a950492f1dbfb874dff63b1ffe
 DIST llvm-project-18.1.8.src.tar.xz.sig 566 BLAKE2B 6ab0efc5b38d4483f4e32e8b85774b2edd5d88fdf29f23b88eb0b5130a7a7f0e80549612b025f927e92de4a08ff7c292cff224dbda91a5d598244e98f7ad0fbd SHA512 ddfd1e8a06756759af6cbe488c82a6d6a62ba91f3e8a0eb4cece561321824f5d165b08ed91010588790b76e19790931d2651b24dba8567e3b151d3cb43bec25b
 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-db8ef6188cbbe2125e6d60bdef77a535105772df.tar.gz 218416682 BLAKE2B 691e3881e4a60c008c6b766b51ecc856122de1f40242ff1d91ebaa12682fea0a22f84783eb930c42d196f50ba0d3b2010f9010ed73ee7e292fe78c93d6e3f324 SHA512 2dc16a603b60607cc3daee2de0126a567a78c4fff72b2fbcb94c82472bc5ec64ac354ba8592b9a643248a5bfd43b34e2a60f2751a0c9e9e28b7f895fc50a5e9d
 DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 EBUILD llvm-common-15.0.7.ebuild 1014 BLAKE2B da3b7ec6cd3c1e57758312fb9ea25e693305e1ef72b350eea85fbde5a1e636269d84bd491b6f528aee8a9cb8229f6304b371f99e6ac416c661c6519706b83b61 SHA512 68b9d672372fe71e39f2b8f9d80eb1dcb5138b8b9b961f56a4eeb81b3fc4054448a51a46b3a62547ebb6262425512f39bc146e5f2c3703de10ab520f1594e7a4
 EBUILD llvm-common-16.0.6.ebuild 1034 BLAKE2B 1e0a0b6cbb746a7eb45e3f553bc949b69314afc3d913cda004d395e7b322c17f976496eed074cf08718dc2d9efa7f3db81dec4f38394fe6ea2b77793b74f4371 SHA512 8fbb211a6b05d24409642fcb00a4fb798499721cc30c4c5fa2df120ed74d9da7286916cf3788ea26f2cb21e334876417b05a4336fedff99e95d1ebe358f8b311
@@ -16,4 +17,5 @@ EBUILD llvm-common-18.1.8.ebuild 1040 BLAKE2B e48cc3f1b8cb1672859d620d637023ddce
 EBUILD llvm-common-19.1.0_rc2.ebuild 925 BLAKE2B 18510f8adb0e892eb63bdbf8a6154f56e23ed026ee6f0bf05bbccbafea843beb228bf57e14b01525fb0b067fdfa897faadbfd61179844a7c397c7f1d3b6fca64 SHA512 0cff75fcbabf14ba1526201d65b79486aefaf559accf5bd479a3643c4351ac997f6d55b2323328fabc4009e887e1cfe70681df5593c62a5b5bbfffb8312ea22d
 EBUILD llvm-common-20.0.0.9999.ebuild 925 BLAKE2B 18510f8adb0e892eb63bdbf8a6154f56e23ed026ee6f0bf05bbccbafea843beb228bf57e14b01525fb0b067fdfa897faadbfd61179844a7c397c7f1d3b6fca64 SHA512 0cff75fcbabf14ba1526201d65b79486aefaf559accf5bd479a3643c4351ac997f6d55b2323328fabc4009e887e1cfe70681df5593c62a5b5bbfffb8312ea22d
 EBUILD llvm-common-20.0.0_pre20240808.ebuild 925 BLAKE2B 18510f8adb0e892eb63bdbf8a6154f56e23ed026ee6f0bf05bbccbafea843beb228bf57e14b01525fb0b067fdfa897faadbfd61179844a7c397c7f1d3b6fca64 SHA512 0cff75fcbabf14ba1526201d65b79486aefaf559accf5bd479a3643c4351ac997f6d55b2323328fabc4009e887e1cfe70681df5593c62a5b5bbfffb8312ea22d
+EBUILD llvm-common-20.0.0_pre20240815.ebuild 925 BLAKE2B 18510f8adb0e892eb63bdbf8a6154f56e23ed026ee6f0bf05bbccbafea843beb228bf57e14b01525fb0b067fdfa897faadbfd61179844a7c397c7f1d3b6fca64 SHA512 0cff75fcbabf14ba1526201d65b79486aefaf559accf5bd479a3643c4351ac997f6d55b2323328fabc4009e887e1cfe70681df5593c62a5b5bbfffb8312ea22d
 MISC metadata.xml 299 BLAKE2B 2feead2cd1b35b3a43335ddd7711f8181b52bc63ee7166608914260c67528add5251349063afbef4f8cf0ec09b2cd4c3ffdd90f2c14ed60bb69ebc03888f6333 SHA512 cd745c54ab18d25bdaff18582105072574103a36cfe7c175ef740f266d00e9fc6f44c332904d23b911c939cf5bdf52973b388923099d8dd5dfef3c283b5cb685
diff --git a/sys-devel/llvm-common/llvm-common-20.0.0_pre20240815.ebuild b/sys-devel/llvm-common/llvm-common-20.0.0_pre20240815.ebuild
new file mode 100644
index 000000000000..2d8f35a84179
--- /dev/null
+++ b/sys-devel/llvm-common/llvm-common-20.0.0_pre20240815.ebuild
@@ -0,0 +1,53 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit elisp-common llvm.org
+
+DESCRIPTION="Common files shared between multiple slots of LLVM"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0"
+IUSE="emacs"
+
+RDEPEND="
+	!sys-devel/llvm:0
+"
+BDEPEND="
+	emacs? ( >=app-editors/emacs-23.1:* )
+"
+
+LLVM_COMPONENTS=( llvm/utils )
+llvm.org_set_globals
+
+SITEFILE="50llvm-gentoo.el"
+BYTECOMPFLAGS="-L emacs"
+
+src_compile() {
+	default
+
+	use emacs && elisp-compile emacs/*.el
+}
+
+src_install() {
+	insinto /usr/share/vim/vimfiles
+	doins -r vim/*/
+	# some users may find it useful
+	newdoc vim/README README.vim
+	dodoc vim/vimrc
+
+	if use emacs ; then
+		elisp-install llvm emacs/*.{el,elc}
+		elisp-make-site-file "${SITEFILE}" llvm
+	fi
+}
+
+pkg_postinst() {
+	use emacs && elisp-site-regen
+}
+
+pkg_postrm() {
+	use emacs && elisp-site-regen
+}
diff --git a/sys-devel/llvm/Manifest b/sys-devel/llvm/Manifest
index cb1a5c25ed5f..e8ab13cf1c74 100644
--- a/sys-devel/llvm/Manifest
+++ b/sys-devel/llvm/Manifest
@@ -18,6 +18,7 @@ DIST llvm-project-18.1.8.src.tar.xz 132067260 BLAKE2B a950492f1dbfb874dff63b1ffe
 DIST llvm-project-18.1.8.src.tar.xz.sig 566 BLAKE2B 6ab0efc5b38d4483f4e32e8b85774b2edd5d88fdf29f23b88eb0b5130a7a7f0e80549612b025f927e92de4a08ff7c292cff224dbda91a5d598244e98f7ad0fbd SHA512 ddfd1e8a06756759af6cbe488c82a6d6a62ba91f3e8a0eb4cece561321824f5d165b08ed91010588790b76e19790931d2651b24dba8567e3b151d3cb43bec25b
 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-db8ef6188cbbe2125e6d60bdef77a535105772df.tar.gz 218416682 BLAKE2B 691e3881e4a60c008c6b766b51ecc856122de1f40242ff1d91ebaa12682fea0a22f84783eb930c42d196f50ba0d3b2010f9010ed73ee7e292fe78c93d6e3f324 SHA512 2dc16a603b60607cc3daee2de0126a567a78c4fff72b2fbcb94c82472bc5ec64ac354ba8592b9a643248a5bfd43b34e2a60f2751a0c9e9e28b7f895fc50a5e9d
 DIST llvm-project-fd7d7882e7fa5a38d4bfde426120d4663718beb4.tar.gz 218217769 BLAKE2B a6c2aa012c342e31527b7e9f85e8fea3549d52530d8f87cd699e094a0aa768d099f9fd2631161ff7f53b4a5011937ed6d1f52b8fa1d23aa34183be1f487d4277 SHA512 c4863fab1a3c03f7f9c42f3501d3a75cebb491343515d77d30b26e5cbd720fc3fd628052099d87ed638e8c424bcbe7a1d066ed857f73da6f243d3d5a76b0e6c5
 EBUILD llvm-15.0.7-r3.ebuild 12592 BLAKE2B 81cd473990810203c4e8a47ceb0189ed399c869b85fab3181724dbd1429063cdaad1f6b6cb1ab5b392f531b0b4907cc61f266558b873b236f9a3ff439045aa37 SHA512 2321f9e6da93af22d5f074175a6a92b7dcd271e2b9b92128d268dd777a9c3bdd876010740153734e2593b90d26a58d4f784b2256a6b1e18160d13b3c10441fb3
 EBUILD llvm-16.0.6.ebuild 12822 BLAKE2B fe0a8bca0506827f09ea9edc18e8574443af644540cec84126fa3668ca8fa538a103c76315ee7c61b0af67a1391168ae7b04201e7825958a46fe8642a327e93b SHA512 a1a861d11791cb583dc33b9c71a86bd50690ffb8b743a6bccf8b4600976f48e96a2b4171cc9b449c17c8b0516ef440cee89df8cff97a3c691968b3431a149612
@@ -28,4 +29,5 @@ EBUILD llvm-18.1.8-r4.ebuild 13382 BLAKE2B 2d52ad708ed578868b700b97cc581ea732147
 EBUILD llvm-19.1.0_rc2.ebuild 13056 BLAKE2B 58a31e7b71687262ab0d6a7b194dbd8fdca492af1402f56d6fd638fd2cee7139faa686a08bf1b33b4c1c7721f1312d2aa1d7e0ce5ba452b9bf571ec49c4e127e SHA512 2cf4583ef22f45b7edb666d665b7d06728873ce724fe851d0cd974dd5f3ecc1e473ed6aa16111f5a6382d2f09088595be4b41fa4d5bf2e316048de0ff250cfbc
 EBUILD llvm-20.0.0.9999.ebuild 13137 BLAKE2B a7e19b19f8caa7fc54e74971f5525c580a9ac93cc26f55eeebe3f77401e588f658c8114549531458ec6f8166918396b77f03180309f2e0406c25a4dcb63c264c SHA512 3e77439099120b69390aca71f834ca60953860496ebc8e31086b3cc4e8b9a84350d1bac16e7cad00a53b68837eb3717c6669ba785d8f607301916f04f390c41d
 EBUILD llvm-20.0.0_pre20240808.ebuild 13137 BLAKE2B a7e19b19f8caa7fc54e74971f5525c580a9ac93cc26f55eeebe3f77401e588f658c8114549531458ec6f8166918396b77f03180309f2e0406c25a4dcb63c264c SHA512 3e77439099120b69390aca71f834ca60953860496ebc8e31086b3cc4e8b9a84350d1bac16e7cad00a53b68837eb3717c6669ba785d8f607301916f04f390c41d
+EBUILD llvm-20.0.0_pre20240815.ebuild 13137 BLAKE2B a7e19b19f8caa7fc54e74971f5525c580a9ac93cc26f55eeebe3f77401e588f658c8114549531458ec6f8166918396b77f03180309f2e0406c25a4dcb63c264c SHA512 3e77439099120b69390aca71f834ca60953860496ebc8e31086b3cc4e8b9a84350d1bac16e7cad00a53b68837eb3717c6669ba785d8f607301916f04f390c41d
 MISC metadata.xml 2835 BLAKE2B 07816d714509d62c0e0a443cc4af1f1f049497de75431f80a981f662b4f2281a16655be3e733a26099d0d814d5ce26d80cee13aa7a4e8d079168846a8e02670f SHA512 292ccb0a05a0239b5b00c6a84be11b4b385900d6467a6a139af03588c61aff9ac0e4bbcd23e89b2a7d7947f7d8cf8ba9323f2539a6c563a338b73f5ac6ffd00f
diff --git a/sys-devel/llvm/llvm-20.0.0_pre20240815.ebuild b/sys-devel/llvm/llvm-20.0.0_pre20240815.ebuild
new file mode 100644
index 000000000000..8401f1a55543
--- /dev/null
+++ b/sys-devel/llvm/llvm-20.0.0_pre20240815.ebuild
@@ -0,0 +1,553 @@
+# 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 flag-o-matic llvm.org multilib-minimal pax-utils python-any-r1
+inherit toolchain-funcs
+
+DESCRIPTION="Low Level Virtual Machine"
+HOMEPAGE="https://llvm.org/"
+
+# Additional licenses:
+# 1. OpenBSD regex: Henry Spencer's license ('rc' in Gentoo) + BSD.
+# 2. xxhash: BSD.
+# 3. MD5 code: public-domain.
+# 4. ConvertUTF.h: TODO.
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA BSD public-domain rc"
+SLOT="${LLVM_MAJOR}/${LLVM_SOABI}"
+IUSE="
+	+binutils-plugin +debug debuginfod doc exegesis libedit +libffi
+	test xml z3 zstd
+"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	sys-libs/zlib:0=[${MULTILIB_USEDEP}]
+	debuginfod? (
+		net-misc/curl:=
+		dev-cpp/cpp-httplib:=
+	)
+	exegesis? ( dev-libs/libpfm:= )
+	libedit? ( dev-libs/libedit:0=[${MULTILIB_USEDEP}] )
+	libffi? ( >=dev-libs/libffi-3.0.13-r1:0=[${MULTILIB_USEDEP}] )
+	xml? ( dev-libs/libxml2:2=[${MULTILIB_USEDEP}] )
+	z3? ( >=sci-mathematics/z3-4.7.1:0=[${MULTILIB_USEDEP}] )
+	zstd? ( app-arch/zstd:=[${MULTILIB_USEDEP}] )
+"
+DEPEND="
+	${RDEPEND}
+	binutils-plugin? ( sys-libs/binutils-libs )
+"
+BDEPEND="
+	${PYTHON_DEPS}
+	dev-lang/perl
+	sys-devel/gnuconfig
+	kernel_Darwin? (
+		<sys-libs/libcxx-${LLVM_VERSION}.9999
+	)
+	libffi? ( virtual/pkgconfig )
+"
+# There are no file collisions between these versions but having :0
+# installed means llvm-config there will take precedence.
+RDEPEND="
+	${RDEPEND}
+	!sys-devel/llvm:0
+"
+PDEPEND="
+	sys-devel/llvm-common
+	sys-devel/llvm-toolchain-symlinks:${LLVM_MAJOR}
+	binutils-plugin? ( >=sys-devel/llvmgold-${LLVM_MAJOR} )
+"
+
+LLVM_COMPONENTS=( llvm cmake third-party )
+LLVM_MANPAGES=1
+LLVM_USE_TARGETS=provide
+llvm.org_set_globals
+
+[[ -n ${LLVM_MANPAGE_DIST} ]] && BDEPEND+=" doc? ( "
+BDEPEND+="
+	$(python_gen_any_dep '
+		dev-python/myst-parser[${PYTHON_USEDEP}]
+		dev-python/sphinx[${PYTHON_USEDEP}]
+	')
+"
+[[ -n ${LLVM_MANPAGE_DIST} ]] && BDEPEND+=" ) "
+
+python_check_deps() {
+	llvm_are_manpages_built || return 0
+
+	python_has_version -b "dev-python/myst-parser[${PYTHON_USEDEP}]" &&
+	python_has_version -b "dev-python/sphinx[${PYTHON_USEDEP}]"
+}
+
+check_uptodate() {
+	local prod_targets=(
+		$(sed -n -e '/set(LLVM_ALL_TARGETS/,/)/p' CMakeLists.txt \
+			| tail -n +2 | head -n -1)
+	)
+	local all_targets=(
+		lib/Target/*/
+	)
+	all_targets=( "${all_targets[@]#lib/Target/}" )
+	all_targets=( "${all_targets[@]%/}" )
+
+	local exp_targets=() i
+	for i in "${all_targets[@]}"; do
+		has "${i}" "${prod_targets[@]}" || exp_targets+=( "${i}" )
+	done
+
+	local outdated
+	if [[ ${exp_targets[*]} != ${ALL_LLVM_EXPERIMENTAL_TARGETS[*]} ]]; then
+		eerror "ALL_LLVM_EXPERIMENTAL_TARGETS are outdated!"
+		eerror "    Have: ${ALL_LLVM_EXPERIMENTAL_TARGETS[*]}"
+		eerror "Expected: ${exp_targets[*]}"
+		eerror
+		outdated=1
+	fi
+
+	if [[ ${prod_targets[*]} != ${ALL_LLVM_PRODUCTION_TARGETS[*]} ]]; then
+		eerror "ALL_LLVM_PRODUCTION_TARGETS are outdated!"
+		eerror "    Have: ${ALL_LLVM_PRODUCTION_TARGETS[*]}"
+		eerror "Expected: ${prod_targets[*]}"
+		outdated=1
+	fi
+
+	[[ ${outdated} ]] && die "Update ALL_LLVM*_TARGETS"
+}
+
+check_distribution_components() {
+	if [[ ${CMAKE_MAKEFILE_GENERATOR} == ninja ]]; then
+		local all_targets=() my_targets=() l
+		cd "${BUILD_DIR}" || die
+
+		while read -r l; do
+			if [[ ${l} == install-*-stripped:* ]]; then
+				l=${l#install-}
+				l=${l%%-stripped*}
+
+				case ${l} in
+					# shared libs
+					LLVM|LLVMgold)
+						;;
+					# TableGen lib + deps
+					LLVMDemangle|LLVMSupport|LLVMTableGen)
+						;;
+					# used by lldb
+					LLVMDebuginfod)
+						;;
+					# testing libraries
+					LLVMTestingAnnotations|LLVMTestingSupport)
+						;;
+					# static libs
+					LLVM*)
+						continue
+						;;
+					# meta-targets
+					distribution|llvm-libraries)
+						continue
+						;;
+					# used only w/ USE=doc
+					docs-llvm-html)
+						use doc || continue
+						;;
+					# used only w/ USE=debuginfd
+					llvm-debuginfod)
+						use debuginfod || continue
+						;;
+				esac
+
+				all_targets+=( "${l}" )
+			fi
+		done < <(${NINJA} -t targets all)
+
+		while read -r l; do
+			my_targets+=( "${l}" )
+		done < <(get_distribution_components $"\n")
+
+		local add=() remove=()
+		for l in "${all_targets[@]}"; do
+			if ! has "${l}" "${my_targets[@]}"; then
+				add+=( "${l}" )
+			fi
+		done
+		for l in "${my_targets[@]}"; do
+			if ! has "${l}" "${all_targets[@]}"; then
+				remove+=( "${l}" )
+			fi
+		done
+
+		if [[ ${#add[@]} -gt 0 || ${#remove[@]} -gt 0 ]]; then
+			eerror "get_distribution_components() is outdated!"
+			eerror "   Add: ${add[*]}"
+			eerror "Remove: ${remove[*]}"
+			die "Update get_distribution_components()!"
+		fi
+		cd - >/dev/null || die
+	fi
+}
+
+src_prepare() {
+	# disable use of SDK on OSX, bug #568758
+	sed -i -e 's/xcrun/false/' utils/lit/lit/util.py || die
+
+	# Update config.guess to support more systems
+	cp "${BROOT}/usr/share/gnuconfig/config.guess" cmake/ || die
+
+	# Verify that the ebuild is up-to-date
+	check_uptodate
+
+	llvm.org_src_prepare
+}
+
+get_distribution_components() {
+	local sep=${1-;}
+
+	local out=(
+		# shared libs
+		LLVM
+		LTO
+		Remarks
+
+		# tools
+		llvm-config
+
+		# common stuff
+		cmake-exports
+		llvm-headers
+
+		# libraries needed for clang-tblgen
+		LLVMDemangle
+		LLVMSupport
+		LLVMTableGen
+
+		# testing libraries
+		llvm_gtest
+		llvm_gtest_main
+		LLVMTestingAnnotations
+		LLVMTestingSupport
+	)
+
+	if multilib_is_native_abi; then
+		out+=(
+			# library used by lldb
+			LLVMDebuginfod
+
+			# utilities
+			llvm-tblgen
+			FileCheck
+			llvm-PerfectShuffle
+			count
+			not
+			yaml-bench
+			UnicodeNameMappingGenerator
+
+			# tools
+			bugpoint
+			dsymutil
+			llc
+			lli
+			lli-child-target
+			llvm-addr2line
+			llvm-ar
+			llvm-as
+			llvm-bcanalyzer
+			llvm-bitcode-strip
+			llvm-c-test
+			llvm-cat
+			llvm-cfi-verify
+			llvm-config
+			llvm-cov
+			llvm-ctxprof-util
+			llvm-cvtres
+			llvm-cxxdump
+			llvm-cxxfilt
+			llvm-cxxmap
+			llvm-debuginfo-analyzer
+			llvm-debuginfod-find
+			llvm-diff
+			llvm-dis
+			llvm-dlltool
+			llvm-dwarfdump
+			llvm-dwarfutil
+			llvm-dwp
+			llvm-exegesis
+			llvm-extract
+			llvm-gsymutil
+			llvm-ifs
+			llvm-install-name-tool
+			llvm-jitlink
+			llvm-jitlink-executor
+			llvm-lib
+			llvm-libtool-darwin
+			llvm-link
+			llvm-lipo
+			llvm-lto
+			llvm-lto2
+			llvm-mc
+			llvm-mca
+			llvm-ml
+			llvm-modextract
+			llvm-mt
+			llvm-nm
+			llvm-objcopy
+			llvm-objdump
+			llvm-opt-report
+			llvm-otool
+			llvm-pdbutil
+			llvm-profdata
+			llvm-profgen
+			llvm-ranlib
+			llvm-rc
+			llvm-readelf
+			llvm-readobj
+			llvm-readtapi
+			llvm-reduce
+			llvm-remarkutil
+			llvm-rtdyld
+			llvm-sim
+			llvm-size
+			llvm-split
+			llvm-stress
+			llvm-strings
+			llvm-strip
+			llvm-symbolizer
+			llvm-tli-checker
+			llvm-undname
+			llvm-windres
+			llvm-xray
+			obj2yaml
+			opt
+			reduce-chunk-list
+			sancov
+			sanstats
+			split-file
+			verify-uselistorder
+			yaml2obj
+
+			# python modules
+			opt-viewer
+		)
+
+		if llvm_are_manpages_built; then
+			out+=(
+				# manpages
+				docs-dsymutil-man
+				docs-llvm-dwarfdump-man
+				docs-llvm-man
+			)
+		fi
+		use doc && out+=(
+			docs-llvm-html
+		)
+
+		use binutils-plugin && out+=(
+			LLVMgold
+		)
+		use debuginfod && out+=(
+			llvm-debuginfod
+		)
+	fi
+
+	printf "%s${sep}" "${out[@]}"
+}
+
+multilib_src_configure() {
+	if use ppc && tc-is-gcc && [[ $(gcc-major-version) -lt 14 ]]; then
+		# Workaround for bug #880677
+		append-flags $(test-flags-CXX -fno-ipa-sra -fno-ipa-modref -fno-ipa-icf)
+	fi
+
+	# ODR violations (bug #917536, bug #926529). Just do it for GCC for now
+	# to avoid people grumbling. GCC is, anecdotally, more likely to miscompile
+	# LLVM with LTO anyway (which is not necessarily its fault).
+	tc-is-gcc && filter-lto
+
+	local ffi_cflags ffi_ldflags
+	if use libffi; then
+		ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
+		ffi_ldflags=$($(tc-getPKG_CONFIG) --libs-only-L libffi)
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		# disable appending VCS revision to the version to improve
+		# direct cache hit ratio
+		-DLLVM_APPEND_VC_REV=OFF
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}"
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+
+		-DBUILD_SHARED_LIBS=OFF
+		-DLLVM_BUILD_LLVM_DYLIB=ON
+		-DLLVM_LINK_LLVM_DYLIB=ON
+		-DLLVM_DISTRIBUTION_COMPONENTS=$(get_distribution_components)
+
+		# cheap hack: LLVM combines both anyway, and the only difference
+		# is that the former list is explicitly verified at cmake time
+		-DLLVM_TARGETS_TO_BUILD=""
+		-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="${LLVM_TARGETS// /;}"
+		-DLLVM_INCLUDE_BENCHMARKS=OFF
+		-DLLVM_INCLUDE_TESTS=ON
+		-DLLVM_BUILD_TESTS=$(usex test)
+		-DLLVM_INSTALL_GTEST=ON
+
+		-DLLVM_ENABLE_FFI=$(usex libffi)
+		-DLLVM_ENABLE_LIBEDIT=$(usex libedit)
+		-DLLVM_ENABLE_LIBXML2=$(usex xml)
+		-DLLVM_ENABLE_ASSERTIONS=$(usex debug)
+		-DLLVM_ENABLE_LIBPFM=$(usex exegesis)
+		-DLLVM_ENABLE_EH=ON
+		-DLLVM_ENABLE_RTTI=ON
+		-DLLVM_ENABLE_Z3_SOLVER=$(usex z3)
+		-DLLVM_ENABLE_ZLIB=FORCE_ON
+		-DLLVM_ENABLE_ZSTD=$(usex zstd FORCE_ON OFF)
+		-DLLVM_ENABLE_CURL=$(usex debuginfod)
+		-DLLVM_ENABLE_HTTPLIB=$(usex debuginfod)
+
+		-DLLVM_HOST_TRIPLE="${CHOST}"
+
+		-DFFI_INCLUDE_DIR="${ffi_cflags#-I}"
+		-DFFI_LIBRARY_DIR="${ffi_ldflags#-L}"
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+
+		# disable OCaml bindings (now in dev-ml/llvm-ocaml)
+		-DOCAMLFIND=NO
+	)
+
+	local suffix=
+	if [[ -n ${EGIT_VERSION} && ${EGIT_BRANCH} != release/* ]]; then
+		# the ABI of the main branch is not stable, so let's include
+		# the commit id in the SOVERSION to contain the breakage
+		suffix+="git${EGIT_VERSION::8}"
+	fi
+	if [[ $(tc-get-cxx-stdlib) == libc++ ]]; then
+		# Smart hack: alter version suffix -> SOVERSION when linking
+		# against libc++. This way we won't end up mixing LLVM libc++
+		# libraries with libstdc++ clang, and the other way around.
+		suffix+="+libcxx"
+		mycmakeargs+=(
+			-DLLVM_ENABLE_LIBCXX=ON
+		)
+	fi
+	mycmakeargs+=(
+		-DLLVM_VERSION_SUFFIX="${suffix}"
+	)
+
+	use test && mycmakeargs+=(
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+	)
+
+	if multilib_is_native_abi; then
+		local build_docs=OFF
+		if llvm_are_manpages_built; then
+			build_docs=ON
+			mycmakeargs+=(
+				-DCMAKE_INSTALL_MANDIR="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/share/man"
+				-DLLVM_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/html"
+				-DSPHINX_WARNINGS_AS_ERRORS=OFF
+			)
+		fi
+
+		mycmakeargs+=(
+			-DLLVM_BUILD_DOCS=${build_docs}
+			-DLLVM_ENABLE_OCAMLDOC=OFF
+			-DLLVM_ENABLE_SPHINX=${build_docs}
+			-DLLVM_ENABLE_DOXYGEN=OFF
+			-DLLVM_INSTALL_UTILS=ON
+		)
+		use binutils-plugin && mycmakeargs+=(
+			-DLLVM_BINUTILS_INCDIR="${EPREFIX}"/usr/include
+		)
+	fi
+
+	use kernel_Darwin && mycmakeargs+=(
+		# Use our libtool instead of looking it up with xcrun
+		-DCMAKE_LIBTOOL="${EPREFIX}/usr/bin/${CHOST}-libtool"
+	)
+
+	# LLVM can have very high memory consumption while linking,
+	# exhausting the limit on 32-bit linker executable
+	use x86 && local -x LDFLAGS="${LDFLAGS} -Wl,--no-keep-memory"
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+	cmake_src_configure
+
+	grep -q -E "^CMAKE_PROJECT_VERSION_MAJOR(:.*)?=${LLVM_MAJOR}$" \
+			CMakeCache.txt ||
+		die "Incorrect version, did you update _LLVM_MAIN_MAJOR?"
+	multilib_is_native_abi && check_distribution_components
+}
+
+multilib_src_compile() {
+	tc-env_build cmake_build distribution
+
+	pax-mark m "${BUILD_DIR}"/bin/llvm-rtdyld
+	pax-mark m "${BUILD_DIR}"/bin/lli
+	pax-mark m "${BUILD_DIR}"/bin/lli-child-target
+
+	if use test; then
+		pax-mark m "${BUILD_DIR}"/unittests/ExecutionEngine/Orc/OrcJITTests
+		pax-mark m "${BUILD_DIR}"/unittests/ExecutionEngine/MCJIT/MCJITTests
+		pax-mark m "${BUILD_DIR}"/unittests/Support/SupportTests
+	fi
+}
+
+multilib_src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check
+}
+
+src_install() {
+	local MULTILIB_CHOST_TOOLS=(
+		/usr/lib/llvm/${LLVM_MAJOR}/bin/llvm-config
+	)
+
+	local MULTILIB_WRAPPED_HEADERS=(
+		/usr/include/llvm/Config/llvm-config.h
+	)
+
+	local LLVM_LDPATHS=()
+	multilib-minimal_src_install
+
+	# move wrapped headers back
+	mv "${ED}"/usr/include "${ED}"/usr/lib/llvm/${LLVM_MAJOR}/include || die
+}
+
+multilib_src_install() {
+	DESTDIR=${D} cmake_build install-distribution
+
+	# move headers to /usr/include for wrapping
+	rm -rf "${ED}"/usr/include || die
+	mv "${ED}"/usr/lib/llvm/${LLVM_MAJOR}/include "${ED}"/usr/include || die
+
+	LLVM_LDPATHS+=( "${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/$(get_libdir)" )
+}
+
+multilib_src_install_all() {
+	local revord=$(( 9999 - ${LLVM_MAJOR} ))
+	newenvd - "60llvm-${revord}" <<-_EOF_
+		PATH="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin"
+		# we need to duplicate it in ROOTPATH for Portage to respect...
+		ROOTPATH="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/bin"
+		MANPATH="${EPREFIX}/usr/lib/llvm/${LLVM_MAJOR}/share/man"
+		LDPATH="$( IFS=:; echo "${LLVM_LDPATHS[*]}" )"
+	_EOF_
+
+	docompress "/usr/lib/llvm/${LLVM_MAJOR}/share/man"
+	llvm_install_manpages
+}
+
+pkg_postinst() {
+	elog "You can find additional opt-viewer utility scripts in:"
+	elog "  ${EROOT}/usr/lib/llvm/${LLVM_MAJOR}/share/opt-viewer"
+	elog "To use these scripts, you will need Python along with the following"
+	elog "packages:"
+	elog "  dev-python/pygments (for opt-viewer)"
+	elog "  dev-python/pyyaml (for all of them)"
+}