gentoo auto-resync : 07:02:2024 - 21:58:53

15 files changed, 1494 insertions, 2 deletions

diff --git a/sys-devel/Manifest.gz b/sys-devel/Manifest.gz
index 502506ada330..c7a51ae00d7c 100644
--- a/sys-devel/Manifest.gz
+++ b/sys-devel/Manifest.gz
diff --git a/sys-devel/autogen/Manifest b/sys-devel/autogen/Manifest
index 3d4d6e183338..5b95c2ad2edc 100644
--- a/sys-devel/autogen/Manifest
+++ b/sys-devel/autogen/Manifest
@@ -9,5 +9,5 @@ DIST autogen-5.18.16-gnulib-3b57ddee0acffd23cc51bc8910a15cf879f90619-lib-verify.
 DIST autogen-5.18.16.tar.xz 1046276 BLAKE2B 23f9e0948f24ada715fb2bcbbfecba768cf51d169ea3ff4724a97b18f598d2d7fb2ffa7e23919ec8dcc0e352f9d3280f3740dab279a0af1412919cf10c6cb0bf SHA512 5f12c982dbe27873f5649a96049bf019ff183c90cc0c8a9196556b0ca02e72940cd422f6d6601f68cc7d8763b1124f2765c3b1a6335fc92ba07f84b03d2a53a1
 EBUILD autogen-5.18.16-r1.ebuild 2179 BLAKE2B ff3c00f51e6987aadf1913a70161457438ddc7990bc88f01d13ad3a79ecb3f7b1af905a490b0e25016fa981670aa57522afecc975af000a7093e301c6ede5c6a SHA512 e02e57585d3b46675c01018aa00652a4632a7b80cbe24d2b1f94664f4a7bafcb53adaacd0a60cc38e36033139edcb9392d9974a7749bb3865f18a108b21d9f8f
 EBUILD autogen-5.18.16-r2.ebuild 2006 BLAKE2B b7bc02d1e6838921f79559f2ee724d04b85cc8381a66ca5c16be451ca33d42d1081822f0d2e7f4ba1efa8fb35ef3b99180a04d83ff391ac094633375f28e5dbc SHA512 091f62d26998abed9236c25265fd7478bce1db0cbfec660c5be355d8dcdfffb7eaacf80c9e90728a24d07b8bad9397fed3c0a8e317a2e3357f9b23c8dfa8a089
-EBUILD autogen-5.18.16-r3.ebuild 2106 BLAKE2B dc8cc7233ea086fe05bc9aa32d96cf1f98ebc3559da2d7013872b6b68d9d05c070a95e582e76cae0da3d792fb15b32099e0d72a43622244727ea2b024863bbf5 SHA512 58c8298bb497164ba8705ef0bdef892ed8365903a994029dc38535c997fc627aeee59984d81c3351666528e850302733d0537fe0847c1364594a6491972aa3ed
+EBUILD autogen-5.18.16-r3.ebuild 2105 BLAKE2B f1be59c32642aee4c70b1cbcc541fb16fccb693116954f6cb23e194910c2072f51b58dbce90bb876a1aa0808a17743668e7628ffb37a7418284cab7aa02d73f8 SHA512 0f4b5f4e761557a7648ccf44afec48e0e377545e7edd6e485dd14460a924a26845986d940328c9ad82c011d9d5b452815495fa2ff8908126c8a4db3ce9231486
 MISC metadata.xml 465 BLAKE2B d749ac3e74b39a006006e3f8d09ca2e8dd392f05385ffaf4d4d4cc95af4571c48e6ff6383e5f582ed6158d3536c9d9447c8f9587a8dc8ad9bce3ea3d5f8b2b5a SHA512 da4398891bf5ddd30545e5ca15b1591da5126d0ae22d00a5d5851864351c43465e6eac9010a9e35a029eb3009727fcd3264cb4fa87fd1f6545639f90b9cf2a47
diff --git a/sys-devel/autogen/autogen-5.18.16-r3.ebuild b/sys-devel/autogen/autogen-5.18.16-r3.ebuild
index a254040d9a82..e9f534f54787 100644
--- a/sys-devel/autogen/autogen-5.18.16-r3.ebuild
+++ b/sys-devel/autogen/autogen-5.18.16-r3.ebuild
@@ -14,7 +14,7 @@ SRC_URI="
 
 LICENSE="GPL-2"
 SLOT="0"
-KEYWORDS="~alpha amd64 arm arm64 ~hppa ~ia64 ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux"
+KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux"
 IUSE="libopts static-libs"
 
 RDEPEND="
diff --git a/sys-devel/clang-common/Manifest b/sys-devel/clang-common/Manifest
index aaaba7702694..df706b66c577 100644
--- a/sys-devel/clang-common/Manifest
+++ b/sys-devel/clang-common/Manifest
@@ -6,12 +6,15 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-18.1.0rc1.src.tar.xz 131969632 BLAKE2B 0cc2f3049a89ee07182189a1ff7aec1751bfe6bbaed4887e139854737fe4eb0ec924b37d8d5b01e298d6a4b271735a615283465262345d0a288180edd6276139 SHA512 85afc331c8a023f4d8177cc42143b968b94d6987a7ed38b8be1170c6b4e1ef1a79d2d4e44d5fae98b713959b5d69bd4e44c6ba84355f59e8fe99588cbca03d7a
 DIST llvm-project-18.1.0rc1.src.tar.xz.sig 566 BLAKE2B c9fd7e92e0c6bb8291314ed388d518d15b75c5d4e7ba5da461c2176c5519d721c5ae95d8ecf99ce17bdc398cf23f13b540aacab306c2923e4c0ac8a5f059746f SHA512 0bb072ef2d3156241bcb74102c977db73720f38918e1a0b2cbe6191b6884ce5750ed9f5af69575599bad840c0151a04f81ebc5194c4ce258cbd6516d6c26d9cb
+DIST llvm-project-18.1.0rc2.src.tar.xz 131993176 BLAKE2B 8df1e34a54214975efe1b9a649753a2dc20c04e3c763bd8648000f48dd18f27ccfdc597ff6e68e0f408310493dfa92f48c7eee53376501e8ebc3b7c614809c15 SHA512 b595bb5d029723fee4e8f8edeaddd6fdcd48d668f66f4239e3208fd19d3a3622e8e4f90ae3fa4b1216fca1621d6c6b6ebf4d99dec7febff2457d0ceb79e8617a
+DIST llvm-project-18.1.0rc2.src.tar.xz.sig 566 BLAKE2B c765549386a92883bd348d9be25a3c92b1e66a1bac71385ef99978ec2af413a7616a2d9699c57554d927f95b80a3584572557d26e3df16b2ff6678359d5fd6b0 SHA512 83bb4c133f34faec8a0109689ed7aa18222c9a803ba8c95c571a18e854726024f106a1c8e3a820020255c426b7fa8bda26789ff1546972e233fbe3e3ab3a8e91
 DIST llvm-project-1f13203029333ac99cc9844b8b6915aae3fc0902.tar.gz 205629630 BLAKE2B cd6c127bc7b63fffc4707863ab8a34e23371ce28878818723ba74d78a1be1b43c2f401fba7de2084f628f9418b7f0e7b9fe9c224b92dc44233cde2f5e3470333 SHA512 0b35754d6e8836267393d0d63effe04e1af5851b217252953ca3a75e7d71e32b1188991d34ff649f8c1cf2a1b49b844ca7e0704597655ffd37d151f4b9a0cf36
 DIST llvm-project-78b4e7c5e349d8c101b50affbd260eb109748f8f.tar.gz 207433034 BLAKE2B ab7189fe82b5a9309348b499130295b3057dbb263ad9c60b1748e4ea92be3a85f0160baa1408dde5516650994951d9f948223d2d6260492a07b07dde51a51ff9 SHA512 366ecb02720d2b550ebeca989abf74ca1c93b2585a95fa378f44edc6c3329ee4e1548f5fa2cf7a19e59bc817abe6cc8850841415227380114c59b58867959a5a
 EBUILD clang-common-15.0.7-r7.ebuild 5462 BLAKE2B 098697c65115e672a1e878167997d820c93cad6a71c5a1dc17c731a031d37f20e50ef41e2f1d3238bc91065ba23bab5db4ab48e8274be9db3cb086ec6cdf7868 SHA512 7500bf0c4fde82b90aac68d09b95a49c241fae8b0d2340f7780e9baed1c85d855e45c4296a7daaa0b831a07f442e0be4faf6510a335fa5c979b3061e28fdb99d
 EBUILD clang-common-16.0.6-r2.ebuild 5681 BLAKE2B a00b9f67b615654b53eb4c55321c30bca9c52e080eca27cc5a9d438813c3b91538992b87fe84dcc43ee6d88fd6b206daa5c92dad11fcec93b1333ced403dfd1c SHA512 103ac4805618935c9208d8d970e52497818c83c620e2ca2646f18b43884055701cebff5b6bbba3365e9728bb7860722017a2fc18d28353ce362ec92e36742940
 EBUILD clang-common-17.0.6-r1.ebuild 8385 BLAKE2B f39a7d9ae89db10077c36f9daa26b7585ee362e2f8bdd8382e157159052fb45d5ad7a8e526e6474681b06d2dd642712056fcdb5b48b2db89b397e8b17810f7a5 SHA512 338efdac1a0acffd76ffb45ef427f94349b4184908a3f2287f431ec559e96164e56930b6b27db1a58ae86a5faeaacd38140e8d6fa79ff4e95a999b682d8ce9ef
 EBUILD clang-common-18.1.0_rc1.ebuild 8402 BLAKE2B 3adfd02f0482b3bec8ee07b8ae9f6ccdf368a5dbb70e31dcc09938a30afc2c50b02f474d9b6a78c114339305d69c1b998591790631cd22b5d85732a6416bd3ea SHA512 498ab238f0c032d80944da74818c4d495082a87b220bdd17dda3eb8e9a070e9636e6f79fc991554c96cdd90670e8a18ebca2ae222b26d8f93c8fa4b5615c6f81
+EBUILD clang-common-18.1.0_rc2.ebuild 8402 BLAKE2B 3adfd02f0482b3bec8ee07b8ae9f6ccdf368a5dbb70e31dcc09938a30afc2c50b02f474d9b6a78c114339305d69c1b998591790631cd22b5d85732a6416bd3ea SHA512 498ab238f0c032d80944da74818c4d495082a87b220bdd17dda3eb8e9a070e9636e6f79fc991554c96cdd90670e8a18ebca2ae222b26d8f93c8fa4b5615c6f81
 EBUILD clang-common-19.0.0.9999.ebuild 8402 BLAKE2B 3adfd02f0482b3bec8ee07b8ae9f6ccdf368a5dbb70e31dcc09938a30afc2c50b02f474d9b6a78c114339305d69c1b998591790631cd22b5d85732a6416bd3ea SHA512 498ab238f0c032d80944da74818c4d495082a87b220bdd17dda3eb8e9a070e9636e6f79fc991554c96cdd90670e8a18ebca2ae222b26d8f93c8fa4b5615c6f81
 EBUILD clang-common-19.0.0_pre20240127.ebuild 7650 BLAKE2B b8d648f4bf5b1713b5d6b6b0f8f0c748e27137dc377496df12ed3621c9aacdc7efb299f84d92925e9fe4d6e06ce7a770f4c3e7c311e789fde2bec20d5c131d25 SHA512 de7ee9e4c0ef261ffca3567ebe4d74dcab3ec2c4032af0c2c11cb40634b88f044a83031317b7c54e5e3420d6345a38b49e472669b762dd56d4fa81e4be0f2ffe
 EBUILD clang-common-19.0.0_pre20240203.ebuild 8402 BLAKE2B 3adfd02f0482b3bec8ee07b8ae9f6ccdf368a5dbb70e31dcc09938a30afc2c50b02f474d9b6a78c114339305d69c1b998591790631cd22b5d85732a6416bd3ea SHA512 498ab238f0c032d80944da74818c4d495082a87b220bdd17dda3eb8e9a070e9636e6f79fc991554c96cdd90670e8a18ebca2ae222b26d8f93c8fa4b5615c6f81
diff --git a/sys-devel/clang-common/clang-common-18.1.0_rc2.ebuild b/sys-devel/clang-common/clang-common-18.1.0_rc2.ebuild
new file mode 100644
index 000000000000..a50679150043
--- /dev/null
+++ b/sys-devel/clang-common/clang-common-18.1.0_rc2.ebuild
@@ -0,0 +1,283 @@
+# 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 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 )
+	!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 ${tool} driver.
+			@gentoo-common.cfg
+			@gentoo-common-ld.cfg
+		EOF
+	done
+
+	if use kernel_Darwin; then
+		cat >> "${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 ${triple}-clang-cpp driver.
+		@gentoo-common.cfg
+	EOF
+
+	# Install symlinks for triples with other vendor strings since some
+	# programs insist on mangling the triple.
+	local vendor
+	for vendor in gentoo pc unknown; do
+		local vendor_triple="${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 "${EPREFIX}/usr/include/gentoo/maybe-stddefs.h"
+	EOF
+
+	# clang-cpp does not like link args being passed to it when directly
+	# invoked, so use a separate configuration file.
+	newins - gentoo-common-ld.cfg <<-EOF
+		# This file contains flags common to clang and clang++
+		@gentoo-hardened-ld.cfg
+	EOF
+
+	# Baseline hardening (bug #851111)
+	newins - gentoo-hardened.cfg <<-EOF
+		# Some of these options are added unconditionally, regardless of
+		# USE=hardened, for parity with sys-devel/gcc.
+		-fstack-clash-protection
+		-fstack-protector-strong
+		-fPIE
+		-include "${EPREFIX}/usr/include/gentoo/fortify.h"
+	EOF
+
+	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
+	EOF
+
+	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.
+			-D_GLIBCXX_ASSERTIONS
+
+			# Analogue to GLIBCXX_ASSERTIONS
+			# https://libcxx.llvm.org/UsingLibcxx.html#assertions-mode
+			# https://libcxx.llvm.org/Hardening.html#using-hardened-mode
+			-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.
+			-Wl,-z,now
+		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 14ad601300ba..2c25683bd092 100644
--- a/sys-devel/clang-runtime/Manifest
+++ b/sys-devel/clang-runtime/Manifest
@@ -2,6 +2,7 @@ EBUILD clang-runtime-15.0.7.ebuild 759 BLAKE2B d7b481faffc4da0a6dc1b4e708322cd17
 EBUILD clang-runtime-16.0.6.ebuild 1448 BLAKE2B be376aab09a0268444784d1a0bcb590222c9c8a118e260b15939e574687334eb476d6f66ab0f1f4fb0841a226c7b7f690666c33bec2d9c14f27a4f30f986b859 SHA512 b0b7a2f5c69890cb2fc0a9c2c8a1910669a4eae16826c0702a2ef508f91b6ec3b5607beab5b24f02951cf9b377f1d09395bd97c27f476137ef6cdf2571330578
 EBUILD clang-runtime-17.0.6.ebuild 1452 BLAKE2B 4a093f4827fa5ebacf44f0bdeb9e2af8a39c491cac3100d96e4d04bf8f82c8247c39369ba85c1d257cbe5c38bb7bd228b986355d4bc446ec8c4c6f19ddac7a18 SHA512 9a3f35cfb6bf234a8e25d9127954fece3e285379469db8bfbbc0c3ca97e952242df930144c528402d48ca64d6b0b5bdadf428d4a41c19b170deb9198bdd3d21b
 EBUILD clang-runtime-18.1.0_rc1.ebuild 1339 BLAKE2B 4a5ee8a332faf2da21256df048867b1458a5ccb2d733d00ee3788bfbc28b3daf4ce2ae2455ab03c9ebb192d964feae2cd5806b5fef23eaa9401d57b35386aa57 SHA512 fac3e259b5a7b5e105b3d5fd2f8e9a9b6236642867e4c4a67106ec999dfaf0a30a97a3905685043a0ab9f38b15b7b8a5a814a97921e37029b9d0beac7ba7085a
+EBUILD clang-runtime-18.1.0_rc2.ebuild 1339 BLAKE2B 4a5ee8a332faf2da21256df048867b1458a5ccb2d733d00ee3788bfbc28b3daf4ce2ae2455ab03c9ebb192d964feae2cd5806b5fef23eaa9401d57b35386aa57 SHA512 fac3e259b5a7b5e105b3d5fd2f8e9a9b6236642867e4c4a67106ec999dfaf0a30a97a3905685043a0ab9f38b15b7b8a5a814a97921e37029b9d0beac7ba7085a
 EBUILD clang-runtime-19.0.0.9999.ebuild 1339 BLAKE2B 4a5ee8a332faf2da21256df048867b1458a5ccb2d733d00ee3788bfbc28b3daf4ce2ae2455ab03c9ebb192d964feae2cd5806b5fef23eaa9401d57b35386aa57 SHA512 fac3e259b5a7b5e105b3d5fd2f8e9a9b6236642867e4c4a67106ec999dfaf0a30a97a3905685043a0ab9f38b15b7b8a5a814a97921e37029b9d0beac7ba7085a
 EBUILD clang-runtime-19.0.0_pre20240127.ebuild 1339 BLAKE2B 4a5ee8a332faf2da21256df048867b1458a5ccb2d733d00ee3788bfbc28b3daf4ce2ae2455ab03c9ebb192d964feae2cd5806b5fef23eaa9401d57b35386aa57 SHA512 fac3e259b5a7b5e105b3d5fd2f8e9a9b6236642867e4c4a67106ec999dfaf0a30a97a3905685043a0ab9f38b15b7b8a5a814a97921e37029b9d0beac7ba7085a
 EBUILD clang-runtime-19.0.0_pre20240203.ebuild 1339 BLAKE2B 4a5ee8a332faf2da21256df048867b1458a5ccb2d733d00ee3788bfbc28b3daf4ce2ae2455ab03c9ebb192d964feae2cd5806b5fef23eaa9401d57b35386aa57 SHA512 fac3e259b5a7b5e105b3d5fd2f8e9a9b6236642867e4c4a67106ec999dfaf0a30a97a3905685043a0ab9f38b15b7b8a5a814a97921e37029b9d0beac7ba7085a
diff --git a/sys-devel/clang-runtime/clang-runtime-18.1.0_rc2.ebuild b/sys-devel/clang-runtime/clang-runtime-18.1.0_rc2.ebuild
new file mode 100644
index 000000000000..323c0b62c062
--- /dev/null
+++ b/sys-devel/clang-runtime/clang-runtime-18.1.0_rc2.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 cf0c2613fb16..cece555b81e5 100644
--- a/sys-devel/clang/Manifest
+++ b/sys-devel/clang/Manifest
@@ -11,12 +11,15 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-18.1.0rc1.src.tar.xz 131969632 BLAKE2B 0cc2f3049a89ee07182189a1ff7aec1751bfe6bbaed4887e139854737fe4eb0ec924b37d8d5b01e298d6a4b271735a615283465262345d0a288180edd6276139 SHA512 85afc331c8a023f4d8177cc42143b968b94d6987a7ed38b8be1170c6b4e1ef1a79d2d4e44d5fae98b713959b5d69bd4e44c6ba84355f59e8fe99588cbca03d7a
 DIST llvm-project-18.1.0rc1.src.tar.xz.sig 566 BLAKE2B c9fd7e92e0c6bb8291314ed388d518d15b75c5d4e7ba5da461c2176c5519d721c5ae95d8ecf99ce17bdc398cf23f13b540aacab306c2923e4c0ac8a5f059746f SHA512 0bb072ef2d3156241bcb74102c977db73720f38918e1a0b2cbe6191b6884ce5750ed9f5af69575599bad840c0151a04f81ebc5194c4ce258cbd6516d6c26d9cb
+DIST llvm-project-18.1.0rc2.src.tar.xz 131993176 BLAKE2B 8df1e34a54214975efe1b9a649753a2dc20c04e3c763bd8648000f48dd18f27ccfdc597ff6e68e0f408310493dfa92f48c7eee53376501e8ebc3b7c614809c15 SHA512 b595bb5d029723fee4e8f8edeaddd6fdcd48d668f66f4239e3208fd19d3a3622e8e4f90ae3fa4b1216fca1621d6c6b6ebf4d99dec7febff2457d0ceb79e8617a
+DIST llvm-project-18.1.0rc2.src.tar.xz.sig 566 BLAKE2B c765549386a92883bd348d9be25a3c92b1e66a1bac71385ef99978ec2af413a7616a2d9699c57554d927f95b80a3584572557d26e3df16b2ff6678359d5fd6b0 SHA512 83bb4c133f34faec8a0109689ed7aa18222c9a803ba8c95c571a18e854726024f106a1c8e3a820020255c426b7fa8bda26789ff1546972e233fbe3e3ab3a8e91
 DIST llvm-project-1f13203029333ac99cc9844b8b6915aae3fc0902.tar.gz 205629630 BLAKE2B cd6c127bc7b63fffc4707863ab8a34e23371ce28878818723ba74d78a1be1b43c2f401fba7de2084f628f9418b7f0e7b9fe9c224b92dc44233cde2f5e3470333 SHA512 0b35754d6e8836267393d0d63effe04e1af5851b217252953ca3a75e7d71e32b1188991d34ff649f8c1cf2a1b49b844ca7e0704597655ffd37d151f4b9a0cf36
 DIST llvm-project-78b4e7c5e349d8c101b50affbd260eb109748f8f.tar.gz 207433034 BLAKE2B ab7189fe82b5a9309348b499130295b3057dbb263ad9c60b1748e4ea92be3a85f0160baa1408dde5516650994951d9f948223d2d6260492a07b07dde51a51ff9 SHA512 366ecb02720d2b550ebeca989abf74ca1c93b2585a95fa378f44edc6c3329ee4e1548f5fa2cf7a19e59bc817abe6cc8850841415227380114c59b58867959a5a
 EBUILD clang-15.0.7-r3.ebuild 12523 BLAKE2B d2f9e112d8c8d782b9d19913332445b234870dbff770bfd520b646347d8d804258e5043a155bb5e15f40ecdb41b2c0d70ee72dbe908b5621c2349d37f181d236 SHA512 c4abe3701012b4f9da97ac182680dbaceed802e95be06ae065debea943fa4635e60f4a0f31b6f23e3f7818f2d30dfb1e2c28f1a85dc0175c158b4e5c68b5a23e
 EBUILD clang-16.0.6.ebuild 12452 BLAKE2B 446a354b58fc0535b81596a9a3785a4cd5d7b7ad52a461baa3b6b7beacdc12161f62da588cd837b8b9c8f35307b1a2c885b9d01bf8edc4af1b551efaab09ebe8 SHA512 58b5694a7d28a03edd4a71e3a99b0b2678285e616cdaab82bb196f092a8726e9cd3787ab07d724680113b4f6683e89103cab2478e49a85e7b5c75a633fb1ca51
 EBUILD clang-17.0.6.ebuild 12132 BLAKE2B d27b7485d05e0d375b9cfbeb509ba03b20c4d444f8ec24263ce7ce21961f6e646ec206aefaa9fb3872b91d3343c364e8eb31e2324f7dcbd212b9e25ca40cb600 SHA512 d581f9ae6b82b0852005932edc6a2f05a24f6c7a52360b95a85f13572dbdfcf95cf81279db313a967b816f21d51522d6704126c9e216445ee94e4ca1112af926
 EBUILD clang-18.1.0_rc1.ebuild 12030 BLAKE2B be1d7f543125a0ef72ef4b14bb5349325bb7c1d5d9ff3d07db8507e9cf4ace7843c863b192e12e868b06e5868f9f99aa2bc5c3e83554e35ea1de0c8615cbdac8 SHA512 0aa5c4b8db0335d0dfddb40efcf9b1f904c549c27716a585b2410a2f1249c879f83ccb82c20a50eb0981fbb939ff68d5ef20afa11658824b02a98eb0b8cb4fa7
+EBUILD clang-18.1.0_rc2.ebuild 12030 BLAKE2B be1d7f543125a0ef72ef4b14bb5349325bb7c1d5d9ff3d07db8507e9cf4ace7843c863b192e12e868b06e5868f9f99aa2bc5c3e83554e35ea1de0c8615cbdac8 SHA512 0aa5c4b8db0335d0dfddb40efcf9b1f904c549c27716a585b2410a2f1249c879f83ccb82c20a50eb0981fbb939ff68d5ef20afa11658824b02a98eb0b8cb4fa7
 EBUILD clang-19.0.0.9999.ebuild 12030 BLAKE2B be1d7f543125a0ef72ef4b14bb5349325bb7c1d5d9ff3d07db8507e9cf4ace7843c863b192e12e868b06e5868f9f99aa2bc5c3e83554e35ea1de0c8615cbdac8 SHA512 0aa5c4b8db0335d0dfddb40efcf9b1f904c549c27716a585b2410a2f1249c879f83ccb82c20a50eb0981fbb939ff68d5ef20afa11658824b02a98eb0b8cb4fa7
 EBUILD clang-19.0.0_pre20240127.ebuild 12030 BLAKE2B be1d7f543125a0ef72ef4b14bb5349325bb7c1d5d9ff3d07db8507e9cf4ace7843c863b192e12e868b06e5868f9f99aa2bc5c3e83554e35ea1de0c8615cbdac8 SHA512 0aa5c4b8db0335d0dfddb40efcf9b1f904c549c27716a585b2410a2f1249c879f83ccb82c20a50eb0981fbb939ff68d5ef20afa11658824b02a98eb0b8cb4fa7
 EBUILD clang-19.0.0_pre20240203.ebuild 12030 BLAKE2B be1d7f543125a0ef72ef4b14bb5349325bb7c1d5d9ff3d07db8507e9cf4ace7843c863b192e12e868b06e5868f9f99aa2bc5c3e83554e35ea1de0c8615cbdac8 SHA512 0aa5c4b8db0335d0dfddb40efcf9b1f904c549c27716a585b2410a2f1249c879f83ccb82c20a50eb0981fbb939ff68d5ef20afa11658824b02a98eb0b8cb4fa7
diff --git a/sys-devel/clang/clang-18.1.0_rc2.ebuild b/sys-devel/clang/clang-18.1.0_rc2.ebuild
new file mode 100644
index 000000000000..f5f1a7728b48
--- /dev/null
+++ b/sys-devel/clang/clang-18.1.0_rc2.ebuild
@@ -0,0 +1,472 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..12} )
+
+inherit cmake llvm llvm.org 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}
+	doc? ( $(python_gen_cond_dep '
+		dev-python/myst-parser[${PYTHON_USEDEP}]
+		dev-python/sphinx[${PYTHON_USEDEP}]
+	') )
+	xml? ( virtual/pkgconfig )
+"
+PDEPEND="
+	~sys-devel/clang-runtime-${PV}
+	sys-devel/clang-toolchain-symlinks:${LLVM_MAJOR}
+"
+
+LLVM_COMPONENTS=(
+	clang clang-tools-extra cmake
+	llvm/lib/Transforms/Hello
+)
+LLVM_MANPAGES=1
+LLVM_TEST_COMPONENTS=(
+	llvm/utils
+)
+LLVM_USE_TARGETS=llvm
+llvm.org_set_globals
+
+# 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).
+
+pkg_setup() {
+	LLVM_MAX_SLOT=${LLVM_MAJOR} llvm_pkg_setup
+	python-single-r1_pkg_setup
+}
+
+src_prepare() {
+	# create extra parent dir for relative CLANG_RESOURCE_DIR access
+	mkdir -p x/y || die
+	BUILD_DIR=${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
+			eqawarn "get_distribution_components() is outdated!"
+			eqawarn "   Add: ${add[*]}"
+			eqawarn "Remove: ${remove[*]}"
+		fi
+		cd - >/dev/null || die
+	fi
+}
+
+get_distribution_components() {
+	local sep=${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-linker-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() {
+	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="${LLVM_TARGETS// /;}"
+
+		# these are not propagated reliably, so redefine them
+		-DLLVM_ENABLE_EH=ON
+		-DLLVM_ENABLE_RTTI=ON
+
+		# libgomp support fails to find headers without explicit -I
+		# furthermore, it provides only syntax checking
+		-DCLANG_DEFAULT_OPENMP_RUNTIME=libomp
+
+		# disable using CUDA to autodetect GPU, just build for all
+		-DCMAKE_DISABLE_FIND_PACKAGE_CUDAToolkit=ON
+		# disable linking to HSA to avoid automagic dep,
+		# load it dynamically instead
+		-DCMAKE_DISABLE_FIND_PACKAGE_hsa-runtime64=ON
+
+		-DCLANG_DEFAULT_PIE_ON_LINUX=$(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/lld/Manifest b/sys-devel/lld/Manifest
index eaa3409fb1e9..3b47a3c67b7e 100644
--- a/sys-devel/lld/Manifest
+++ b/sys-devel/lld/Manifest
@@ -7,12 +7,15 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-18.1.0rc1.src.tar.xz 131969632 BLAKE2B 0cc2f3049a89ee07182189a1ff7aec1751bfe6bbaed4887e139854737fe4eb0ec924b37d8d5b01e298d6a4b271735a615283465262345d0a288180edd6276139 SHA512 85afc331c8a023f4d8177cc42143b968b94d6987a7ed38b8be1170c6b4e1ef1a79d2d4e44d5fae98b713959b5d69bd4e44c6ba84355f59e8fe99588cbca03d7a
 DIST llvm-project-18.1.0rc1.src.tar.xz.sig 566 BLAKE2B c9fd7e92e0c6bb8291314ed388d518d15b75c5d4e7ba5da461c2176c5519d721c5ae95d8ecf99ce17bdc398cf23f13b540aacab306c2923e4c0ac8a5f059746f SHA512 0bb072ef2d3156241bcb74102c977db73720f38918e1a0b2cbe6191b6884ce5750ed9f5af69575599bad840c0151a04f81ebc5194c4ce258cbd6516d6c26d9cb
+DIST llvm-project-18.1.0rc2.src.tar.xz 131993176 BLAKE2B 8df1e34a54214975efe1b9a649753a2dc20c04e3c763bd8648000f48dd18f27ccfdc597ff6e68e0f408310493dfa92f48c7eee53376501e8ebc3b7c614809c15 SHA512 b595bb5d029723fee4e8f8edeaddd6fdcd48d668f66f4239e3208fd19d3a3622e8e4f90ae3fa4b1216fca1621d6c6b6ebf4d99dec7febff2457d0ceb79e8617a
+DIST llvm-project-18.1.0rc2.src.tar.xz.sig 566 BLAKE2B c765549386a92883bd348d9be25a3c92b1e66a1bac71385ef99978ec2af413a7616a2d9699c57554d927f95b80a3584572557d26e3df16b2ff6678359d5fd6b0 SHA512 83bb4c133f34faec8a0109689ed7aa18222c9a803ba8c95c571a18e854726024f106a1c8e3a820020255c426b7fa8bda26789ff1546972e233fbe3e3ab3a8e91
 DIST llvm-project-1f13203029333ac99cc9844b8b6915aae3fc0902.tar.gz 205629630 BLAKE2B cd6c127bc7b63fffc4707863ab8a34e23371ce28878818723ba74d78a1be1b43c2f401fba7de2084f628f9418b7f0e7b9fe9c224b92dc44233cde2f5e3470333 SHA512 0b35754d6e8836267393d0d63effe04e1af5851b217252953ca3a75e7d71e32b1188991d34ff649f8c1cf2a1b49b844ca7e0704597655ffd37d151f4b9a0cf36
 DIST llvm-project-78b4e7c5e349d8c101b50affbd260eb109748f8f.tar.gz 207433034 BLAKE2B ab7189fe82b5a9309348b499130295b3057dbb263ad9c60b1748e4ea92be3a85f0160baa1408dde5516650994951d9f948223d2d6260492a07b07dde51a51ff9 SHA512 366ecb02720d2b550ebeca989abf74ca1c93b2585a95fa378f44edc6c3329ee4e1548f5fa2cf7a19e59bc817abe6cc8850841415227380114c59b58867959a5a
 EBUILD lld-15.0.7.ebuild 2269 BLAKE2B 322d5608e3acfb87bfb720646404ed405a3113c4faf1059428663a50d5566d7842fcff57ccf3aeb5e97b1a9acd4efd862db2368f130e088944ef4f0faf3c90f8 SHA512 e50d1d99fe18b6aba57c06eb6853f3212be1f7b7f2f3c70dcd226a69a4defc753eafcce77eb74f30eaa31b010fa094738718c1cdb23e584ef6e33eb72e536719
 EBUILD lld-16.0.6.ebuild 2324 BLAKE2B 9b849aea16a8188e4da4cfcf0c85fb3e997007e1287ec062aee182c7955c7bc78132e761c2611198c7207283fbe930fbee6bdc9a39b922d6d5387bedadaf1b76 SHA512 a7c3d4c1508e5435ba9f6250c6b2fd3157fb4f2c205a6888736f79fa739c59eec3e901927b53af81de3a3c6d4fa5d576be3eaa6ad45c60e5d952ed4ad9706c2f
 EBUILD lld-17.0.6.ebuild 2269 BLAKE2B 025ba62d48a5729b69dabfba00934540ec181b8681dbcdb9342337c85889daf5049d773db4d115f353d2e18ff2e9100f0c0e3463044884ef9636c4be2bc61779 SHA512 c319f1c24d8399f4f7feaf5ca3389b85e29ae090dfcb1447da55eba248646b15b779895f237258ec296c258a81c98f9f1537574467c2b10697ffa1150dbb8b49
 EBUILD lld-18.1.0_rc1.ebuild 2199 BLAKE2B ce9162e5de2ab6d0ffa94f5132f996d3b7f45d46937fe6a6d86a9b4cafc1435f27309853e7e00be2938ba8bc4e24a99eafc4a6fa11c9d2f49e6b3b2c3cbfd960 SHA512 e81ca64ee28290e35be514d4b3b1767f5efb21a26812a97291b865407fa7953c27a66145a9b0f6036b09353e6b5ee48c5a682580eaa093b36af28103749ec98c
+EBUILD lld-18.1.0_rc2.ebuild 2199 BLAKE2B ce9162e5de2ab6d0ffa94f5132f996d3b7f45d46937fe6a6d86a9b4cafc1435f27309853e7e00be2938ba8bc4e24a99eafc4a6fa11c9d2f49e6b3b2c3cbfd960 SHA512 e81ca64ee28290e35be514d4b3b1767f5efb21a26812a97291b865407fa7953c27a66145a9b0f6036b09353e6b5ee48c5a682580eaa093b36af28103749ec98c
 EBUILD lld-19.0.0.9999.ebuild 2199 BLAKE2B ce9162e5de2ab6d0ffa94f5132f996d3b7f45d46937fe6a6d86a9b4cafc1435f27309853e7e00be2938ba8bc4e24a99eafc4a6fa11c9d2f49e6b3b2c3cbfd960 SHA512 e81ca64ee28290e35be514d4b3b1767f5efb21a26812a97291b865407fa7953c27a66145a9b0f6036b09353e6b5ee48c5a682580eaa093b36af28103749ec98c
 EBUILD lld-19.0.0_pre20240127.ebuild 2199 BLAKE2B ce9162e5de2ab6d0ffa94f5132f996d3b7f45d46937fe6a6d86a9b4cafc1435f27309853e7e00be2938ba8bc4e24a99eafc4a6fa11c9d2f49e6b3b2c3cbfd960 SHA512 e81ca64ee28290e35be514d4b3b1767f5efb21a26812a97291b865407fa7953c27a66145a9b0f6036b09353e6b5ee48c5a682580eaa093b36af28103749ec98c
 EBUILD lld-19.0.0_pre20240203.ebuild 2199 BLAKE2B ce9162e5de2ab6d0ffa94f5132f996d3b7f45d46937fe6a6d86a9b4cafc1435f27309853e7e00be2938ba8bc4e24a99eafc4a6fa11c9d2f49e6b3b2c3cbfd960 SHA512 e81ca64ee28290e35be514d4b3b1767f5efb21a26812a97291b865407fa7953c27a66145a9b0f6036b09353e6b5ee48c5a682580eaa093b36af28103749ec98c
diff --git a/sys-devel/lld/lld-18.1.0_rc2.ebuild b/sys-devel/lld/lld-18.1.0_rc2.ebuild
new file mode 100644
index 000000000000..e72385c1bdb1
--- /dev/null
+++ b/sys-devel/lld/lld-18.1.0_rc2.ebuild
@@ -0,0 +1,89 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..12} )
+inherit cmake flag-o-matic llvm llvm.org 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}[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	LLVM_MAX_SLOT=${LLVM_MAJOR} llvm_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_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 cdf0f5804eb4..a60b5c641b04 100644
--- a/sys-devel/llvm-common/Manifest
+++ b/sys-devel/llvm-common/Manifest
@@ -6,12 +6,15 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-18.1.0rc1.src.tar.xz 131969632 BLAKE2B 0cc2f3049a89ee07182189a1ff7aec1751bfe6bbaed4887e139854737fe4eb0ec924b37d8d5b01e298d6a4b271735a615283465262345d0a288180edd6276139 SHA512 85afc331c8a023f4d8177cc42143b968b94d6987a7ed38b8be1170c6b4e1ef1a79d2d4e44d5fae98b713959b5d69bd4e44c6ba84355f59e8fe99588cbca03d7a
 DIST llvm-project-18.1.0rc1.src.tar.xz.sig 566 BLAKE2B c9fd7e92e0c6bb8291314ed388d518d15b75c5d4e7ba5da461c2176c5519d721c5ae95d8ecf99ce17bdc398cf23f13b540aacab306c2923e4c0ac8a5f059746f SHA512 0bb072ef2d3156241bcb74102c977db73720f38918e1a0b2cbe6191b6884ce5750ed9f5af69575599bad840c0151a04f81ebc5194c4ce258cbd6516d6c26d9cb
+DIST llvm-project-18.1.0rc2.src.tar.xz 131993176 BLAKE2B 8df1e34a54214975efe1b9a649753a2dc20c04e3c763bd8648000f48dd18f27ccfdc597ff6e68e0f408310493dfa92f48c7eee53376501e8ebc3b7c614809c15 SHA512 b595bb5d029723fee4e8f8edeaddd6fdcd48d668f66f4239e3208fd19d3a3622e8e4f90ae3fa4b1216fca1621d6c6b6ebf4d99dec7febff2457d0ceb79e8617a
+DIST llvm-project-18.1.0rc2.src.tar.xz.sig 566 BLAKE2B c765549386a92883bd348d9be25a3c92b1e66a1bac71385ef99978ec2af413a7616a2d9699c57554d927f95b80a3584572557d26e3df16b2ff6678359d5fd6b0 SHA512 83bb4c133f34faec8a0109689ed7aa18222c9a803ba8c95c571a18e854726024f106a1c8e3a820020255c426b7fa8bda26789ff1546972e233fbe3e3ab3a8e91
 DIST llvm-project-1f13203029333ac99cc9844b8b6915aae3fc0902.tar.gz 205629630 BLAKE2B cd6c127bc7b63fffc4707863ab8a34e23371ce28878818723ba74d78a1be1b43c2f401fba7de2084f628f9418b7f0e7b9fe9c224b92dc44233cde2f5e3470333 SHA512 0b35754d6e8836267393d0d63effe04e1af5851b217252953ca3a75e7d71e32b1188991d34ff649f8c1cf2a1b49b844ca7e0704597655ffd37d151f4b9a0cf36
 DIST llvm-project-78b4e7c5e349d8c101b50affbd260eb109748f8f.tar.gz 207433034 BLAKE2B ab7189fe82b5a9309348b499130295b3057dbb263ad9c60b1748e4ea92be3a85f0160baa1408dde5516650994951d9f948223d2d6260492a07b07dde51a51ff9 SHA512 366ecb02720d2b550ebeca989abf74ca1c93b2585a95fa378f44edc6c3329ee4e1548f5fa2cf7a19e59bc817abe6cc8850841415227380114c59b58867959a5a
 EBUILD llvm-common-15.0.7.ebuild 1014 BLAKE2B da3b7ec6cd3c1e57758312fb9ea25e693305e1ef72b350eea85fbde5a1e636269d84bd491b6f528aee8a9cb8229f6304b371f99e6ac416c661c6519706b83b61 SHA512 68b9d672372fe71e39f2b8f9d80eb1dcb5138b8b9b961f56a4eeb81b3fc4054448a51a46b3a62547ebb6262425512f39bc146e5f2c3703de10ab520f1594e7a4
 EBUILD llvm-common-16.0.6.ebuild 1034 BLAKE2B 1e0a0b6cbb746a7eb45e3f553bc949b69314afc3d913cda004d395e7b322c17f976496eed074cf08718dc2d9efa7f3db81dec4f38394fe6ea2b77793b74f4371 SHA512 8fbb211a6b05d24409642fcb00a4fb798499721cc30c4c5fa2df120ed74d9da7286916cf3788ea26f2cb21e334876417b05a4336fedff99e95d1ebe358f8b311
 EBUILD llvm-common-17.0.6.ebuild 1038 BLAKE2B 520c87adc7e5a3aab9b000c040610bb22da789fde0c20a9ee9042b3a2441a9403d82d1048144cb2e01e7215645872fbc7679ccc6e5d52d0258de3e595aed0d48 SHA512 9e8eae21e06bbe7179fbdbfe6eb7e77e9cc793c4f26605d2b96ca07b5e8e197e13fff8ce8d878d0b87375ba243bc08e48940b880f7602d145d16039515ec77a5
 EBUILD llvm-common-18.1.0_rc1.ebuild 925 BLAKE2B 18510f8adb0e892eb63bdbf8a6154f56e23ed026ee6f0bf05bbccbafea843beb228bf57e14b01525fb0b067fdfa897faadbfd61179844a7c397c7f1d3b6fca64 SHA512 0cff75fcbabf14ba1526201d65b79486aefaf559accf5bd479a3643c4351ac997f6d55b2323328fabc4009e887e1cfe70681df5593c62a5b5bbfffb8312ea22d
+EBUILD llvm-common-18.1.0_rc2.ebuild 925 BLAKE2B 18510f8adb0e892eb63bdbf8a6154f56e23ed026ee6f0bf05bbccbafea843beb228bf57e14b01525fb0b067fdfa897faadbfd61179844a7c397c7f1d3b6fca64 SHA512 0cff75fcbabf14ba1526201d65b79486aefaf559accf5bd479a3643c4351ac997f6d55b2323328fabc4009e887e1cfe70681df5593c62a5b5bbfffb8312ea22d
 EBUILD llvm-common-19.0.0.9999.ebuild 925 BLAKE2B 18510f8adb0e892eb63bdbf8a6154f56e23ed026ee6f0bf05bbccbafea843beb228bf57e14b01525fb0b067fdfa897faadbfd61179844a7c397c7f1d3b6fca64 SHA512 0cff75fcbabf14ba1526201d65b79486aefaf559accf5bd479a3643c4351ac997f6d55b2323328fabc4009e887e1cfe70681df5593c62a5b5bbfffb8312ea22d
 EBUILD llvm-common-19.0.0_pre20240127.ebuild 925 BLAKE2B 18510f8adb0e892eb63bdbf8a6154f56e23ed026ee6f0bf05bbccbafea843beb228bf57e14b01525fb0b067fdfa897faadbfd61179844a7c397c7f1d3b6fca64 SHA512 0cff75fcbabf14ba1526201d65b79486aefaf559accf5bd479a3643c4351ac997f6d55b2323328fabc4009e887e1cfe70681df5593c62a5b5bbfffb8312ea22d
 EBUILD llvm-common-19.0.0_pre20240203.ebuild 925 BLAKE2B 18510f8adb0e892eb63bdbf8a6154f56e23ed026ee6f0bf05bbccbafea843beb228bf57e14b01525fb0b067fdfa897faadbfd61179844a7c397c7f1d3b6fca64 SHA512 0cff75fcbabf14ba1526201d65b79486aefaf559accf5bd479a3643c4351ac997f6d55b2323328fabc4009e887e1cfe70681df5593c62a5b5bbfffb8312ea22d
diff --git a/sys-devel/llvm-common/llvm-common-18.1.0_rc2.ebuild b/sys-devel/llvm-common/llvm-common-18.1.0_rc2.ebuild
new file mode 100644
index 000000000000..2d8f35a84179
--- /dev/null
+++ b/sys-devel/llvm-common/llvm-common-18.1.0_rc2.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 c0073ba8dc2c..cb7900088baf 100644
--- a/sys-devel/llvm/Manifest
+++ b/sys-devel/llvm/Manifest
@@ -12,12 +12,15 @@ DIST llvm-project-17.0.6.src.tar.xz 127838860 BLAKE2B d6ede1a9fda8756995c3e06541
 DIST llvm-project-17.0.6.src.tar.xz.sig 438 BLAKE2B 186e75b6a0fbfe1e85408589c149e1800fcc47d685b74e4260018e05cd08bc793d1d1197c9c50e177eea941a3d0c65cb0c583ce6dae449099b920adf8a508ef7 SHA512 f78c55053a6450625f3e95f52c305110b4468a9854fec75831b65b8d6ceee3c9206ab9e63c4b5fda8be9bd344f72cfbdaae0520ed240abd505e08ebeaa25d340
 DIST llvm-project-18.1.0rc1.src.tar.xz 131969632 BLAKE2B 0cc2f3049a89ee07182189a1ff7aec1751bfe6bbaed4887e139854737fe4eb0ec924b37d8d5b01e298d6a4b271735a615283465262345d0a288180edd6276139 SHA512 85afc331c8a023f4d8177cc42143b968b94d6987a7ed38b8be1170c6b4e1ef1a79d2d4e44d5fae98b713959b5d69bd4e44c6ba84355f59e8fe99588cbca03d7a
 DIST llvm-project-18.1.0rc1.src.tar.xz.sig 566 BLAKE2B c9fd7e92e0c6bb8291314ed388d518d15b75c5d4e7ba5da461c2176c5519d721c5ae95d8ecf99ce17bdc398cf23f13b540aacab306c2923e4c0ac8a5f059746f SHA512 0bb072ef2d3156241bcb74102c977db73720f38918e1a0b2cbe6191b6884ce5750ed9f5af69575599bad840c0151a04f81ebc5194c4ce258cbd6516d6c26d9cb
+DIST llvm-project-18.1.0rc2.src.tar.xz 131993176 BLAKE2B 8df1e34a54214975efe1b9a649753a2dc20c04e3c763bd8648000f48dd18f27ccfdc597ff6e68e0f408310493dfa92f48c7eee53376501e8ebc3b7c614809c15 SHA512 b595bb5d029723fee4e8f8edeaddd6fdcd48d668f66f4239e3208fd19d3a3622e8e4f90ae3fa4b1216fca1621d6c6b6ebf4d99dec7febff2457d0ceb79e8617a
+DIST llvm-project-18.1.0rc2.src.tar.xz.sig 566 BLAKE2B c765549386a92883bd348d9be25a3c92b1e66a1bac71385ef99978ec2af413a7616a2d9699c57554d927f95b80a3584572557d26e3df16b2ff6678359d5fd6b0 SHA512 83bb4c133f34faec8a0109689ed7aa18222c9a803ba8c95c571a18e854726024f106a1c8e3a820020255c426b7fa8bda26789ff1546972e233fbe3e3ab3a8e91
 DIST llvm-project-1f13203029333ac99cc9844b8b6915aae3fc0902.tar.gz 205629630 BLAKE2B cd6c127bc7b63fffc4707863ab8a34e23371ce28878818723ba74d78a1be1b43c2f401fba7de2084f628f9418b7f0e7b9fe9c224b92dc44233cde2f5e3470333 SHA512 0b35754d6e8836267393d0d63effe04e1af5851b217252953ca3a75e7d71e32b1188991d34ff649f8c1cf2a1b49b844ca7e0704597655ffd37d151f4b9a0cf36
 DIST llvm-project-78b4e7c5e349d8c101b50affbd260eb109748f8f.tar.gz 207433034 BLAKE2B ab7189fe82b5a9309348b499130295b3057dbb263ad9c60b1748e4ea92be3a85f0160baa1408dde5516650994951d9f948223d2d6260492a07b07dde51a51ff9 SHA512 366ecb02720d2b550ebeca989abf74ca1c93b2585a95fa378f44edc6c3329ee4e1548f5fa2cf7a19e59bc817abe6cc8850841415227380114c59b58867959a5a
 EBUILD llvm-15.0.7-r3.ebuild 12507 BLAKE2B 61b25e81c868610f71c7c6c90150121bf00e65132a9de5c9a135b0aac7f0946dd342b7e98cc65e1f87717560a0fdbbe402f0ca9b2923af981aab595455d52380 SHA512 f3ee878de78c4c8b850eaed51aea03436c3263f7f6321b7ed4aea1928b81978f5f8897221330582f06d3742b5e715696368793205435a893822799c614d6de2a
 EBUILD llvm-16.0.6.ebuild 12812 BLAKE2B 30da8ed0c51b920dad6871a8eb98f1a80407c92916dd2d44caf90b89d6ba5513f3b5a7dfe5249dc245acdc2ae296aa0fd5e5de32c5801da9506886f286e0a93b SHA512 fdd03f815360c54992f41c2f15ffa3c505a3fba3e6cdcfe709dbf095a624797cc07367896c9f952b74bc71a6f0c1da3f110add4faa956a71e361f3127cbd6493
 EBUILD llvm-17.0.6.ebuild 13097 BLAKE2B 264d69f3f30807f734f5ed7240e006643dbd00d13dbedf7e1af52fdfec0071335a15ebf901df26afc91ca9c5d1d929081abf8f057d5d0a93efbf61febe6eeb2c SHA512 c026736f45e4318899bf52dc1ea48b28006f9a6634c7ac843ffd932e5b158920492bcd162d06ce28ded975cf93a572d48f440b98e21f07211154f874d35462d6
 EBUILD llvm-18.1.0_rc1.ebuild 12916 BLAKE2B caf2a912bf5a7acdffa32d457ba8969e80064de80b4ee579f7796ae6430510f31511457ad672e007b286726e4bc196f0b4fca9c4d47233712dfd409ed79ab711 SHA512 798fe3c2e11a08865db06e25df3ebb2a7c549fb405b5a9fe92598f64a76413526194d6af363c0b64b81057df971a48498c8208c3841b12274b215a45037d9fd8
+EBUILD llvm-18.1.0_rc2.ebuild 12916 BLAKE2B caf2a912bf5a7acdffa32d457ba8969e80064de80b4ee579f7796ae6430510f31511457ad672e007b286726e4bc196f0b4fca9c4d47233712dfd409ed79ab711 SHA512 798fe3c2e11a08865db06e25df3ebb2a7c549fb405b5a9fe92598f64a76413526194d6af363c0b64b81057df971a48498c8208c3841b12274b215a45037d9fd8
 EBUILD llvm-19.0.0.9999.ebuild 12916 BLAKE2B caf2a912bf5a7acdffa32d457ba8969e80064de80b4ee579f7796ae6430510f31511457ad672e007b286726e4bc196f0b4fca9c4d47233712dfd409ed79ab711 SHA512 798fe3c2e11a08865db06e25df3ebb2a7c549fb405b5a9fe92598f64a76413526194d6af363c0b64b81057df971a48498c8208c3841b12274b215a45037d9fd8
 EBUILD llvm-19.0.0_pre20240127.ebuild 12949 BLAKE2B d16a4783e1004bed2e7c8a4a3750605067989c436f4a753d2bdeb4b5305b6c82762f9ee1011ab44be6105ea4acb134178852ce99f5cd98c24fef6ec8ecad6a78 SHA512 25a92d4b81981bea436f6fba363474447ef464943f92d1541c0d04dfe2c4ed8abcd41a500aba133ea74dfc426dd92e636a247d5f9f6bd000a688f572b660a9d1
 EBUILD llvm-19.0.0_pre20240203.ebuild 12916 BLAKE2B caf2a912bf5a7acdffa32d457ba8969e80064de80b4ee579f7796ae6430510f31511457ad672e007b286726e4bc196f0b4fca9c4d47233712dfd409ed79ab711 SHA512 798fe3c2e11a08865db06e25df3ebb2a7c549fb405b5a9fe92598f64a76413526194d6af363c0b64b81057df971a48498c8208c3841b12274b215a45037d9fd8
diff --git a/sys-devel/llvm/llvm-18.1.0_rc2.ebuild b/sys-devel/llvm/llvm-18.1.0_rc2.ebuild
new file mode 100644
index 000000000000..23646ea90d8a
--- /dev/null
+++ b/sys-devel/llvm/llvm-18.1.0_rc2.ebuild
@@ -0,0 +1,540 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10..12} )
+
+inherit cmake 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}/${LLVM_SOABI}"
+IUSE="
+	+binutils-plugin +debug debuginfod doc exegesis libedit +libffi
+	ncurses test xml z3 zstd
+"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	sys-libs/zlib:0=[${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}] )
+	ncurses? ( >=sys-libs/ncurses-5.9-r3:0=[${MULTILIB_USEDEP}] )
+	xml? ( dev-libs/libxml2:2=[${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
+	)
+	doc? ( $(python_gen_any_dep '
+		dev-python/myst-parser[${PYTHON_USEDEP}]
+		dev-python/sphinx[${PYTHON_USEDEP}]
+	') )
+	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-${LLVM_MAJOR} )
+"
+
+LLVM_COMPONENTS=( llvm cmake third-party )
+LLVM_MANPAGES=1
+LLVM_USE_TARGETS=provide
+llvm.org_set_globals
+
+python_check_deps() {
+	use doc || return 0
+
+	python_has_version -b "dev-python/myst-parser[${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
+
+	if [[ ${exp_targets[*]} != ${ALL_LLVM_EXPERIMENTAL_TARGETS[*]} ]]; then
+		eqawarn "ALL_LLVM_EXPERIMENTAL_TARGETS is outdated!"
+		eqawarn "    Have: ${ALL_LLVM_EXPERIMENTAL_TARGETS[*]}"
+		eqawarn "Expected: ${exp_targets[*]}"
+		eqawarn
+	fi
+
+	if [[ ${prod_targets[*]} != ${ALL_LLVM_PRODUCTION_TARGETS[*]} ]]; then
+		eqawarn "ALL_LLVM_PRODUCTION_TARGETS is outdated!"
+		eqawarn "    Have: ${ALL_LLVM_PRODUCTION_TARGETS[*]}"
+		eqawarn "Expected: ${prod_targets[*]}"
+	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 ${l} in
+					# shared libs
+					LLVM|LLVMgold)
+						;;
+					# TableGen lib + deps
+					LLVMDemangle|LLVMSupport|LLVMTableGen)
+						;;
+					# used by lldb
+					LLVMDebuginfod)
+						;;
+					# testing libraries
+					LLVMTestingAnnotations|LLVMTestingSupport)
+						;;
+					# static libs
+					LLVM*)
+						continue
+						;;
+					# meta-targets
+					distribution|llvm-libraries)
+						continue
+						;;
+					# used only w/ USE=doc
+					docs-llvm-html)
+						use doc || continue
+						;;
+				esac
+
+				all_targets+=( "${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
+			eqawarn "get_distribution_components() is outdated!"
+			eqawarn "   Add: ${add[*]}"
+			eqawarn "Remove: ${remove[*]}"
+		fi
+		cd - >/dev/null || die
+	fi
+}
+
+src_prepare() {
+	# disable use of SDK on OSX, bug #568758
+	sed -i -e 's/xcrun/false/' utils/lit/lit/util.py || die
+
+	# Update config.guess to support more systems
+	cp "${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-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
+			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}" "${out[@]}"
+}
+
+multilib_src_configure() {
+	local ffi_cflags ffi_ldflags
+	if use libffi; then
+		ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
+		ffi_ldflags=$($(tc-getPKG_CONFIG) --libs-only-L libffi)
+	fi
+
+	local libdir=$(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_TERMINFO=$(usex ncurses)
+		-DLLVM_ENABLE_LIBXML2=$(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
+
+	# On Macos prefix, Gentoo doesn't split sys-libs/ncurses to libtinfo and
+	# libncurses, but llvm tries to use libtinfo before libncurses, and ends up
+	# using libtinfo (actually, libncurses.dylib) from system instead of prefix
+	use kernel_Darwin && mycmakeargs+=(
+		-DTerminfo_LIBRARIES=-lncurses
+	)
+
+	# workaround BMI bug in gcc-7 (fixed in 7.4)
+	# https://bugs.gentoo.org/649880
+	# apply only to x86, https://bugs.gentoo.org/650506
+	if tc-is-gcc && [[ ${MULTILIB_ABI_FLAG} == abi_x86* ]] &&
+			[[ $(gcc-major-version) -eq 7 && $(gcc-minor-version) -lt 4 ]]
+	then
+		local CFLAGS="${CFLAGS} -mno-bmi"
+		local CXXFLAGS="${CXXFLAGS} -mno-bmi"
+	fi
+
+	# LLVM can have very high memory consumption while linking,
+	# exhausting the limit on 32-bit linker executable
+	use x86 && local -x LDFLAGS="${LDFLAGS} -Wl,--no-keep-memory"
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+	cmake_src_configure
+
+	grep -q -E "^CMAKE_PROJECT_VERSION_MAJOR(:.*)?=${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)"
+}