gentoo resync : 16.01.2021

2 files changed, 513 insertions, 0 deletions

diff --git a/sys-devel/llvm/Manifest b/sys-devel/llvm/Manifest
index ddf4f04e098a..bed98de3fba6 100644
--- a/sys-devel/llvm/Manifest
+++ b/sys-devel/llvm/Manifest
@@ -5,15 +5,18 @@ DIST llvm-gentoo-patchset-11.1.0-1.tar.xz 4032 BLAKE2B e69138a422e315b31a3d9c11f
 DIST llvm-gentoo-patchset-12.0.1.tar.xz 5280 BLAKE2B 963d005bc7b636570be90eb841ac5bcaeb927538cc7de27683167111a17d6496677c7517de2ecfaf14b5d8ac22bad357be490b8a2ed9aba502fd5f447ecc99e9 SHA512 fc7c38e671555751650299c3a8bee44d5c7f26e11b68d5538c507fb7fe9ff2d349bdcd43bce90a448a747f082d523b3849d6bcda5e3ae2e998edcb926d6aa249
 DIST llvm-gentoo-patchset-13.0.0.tar.xz 5012 BLAKE2B 6760c78c086aaf6629143fd920b0a2c68cad9278628fbea8164dfeb59db95984a5b5d6b3505b510c697e8c95bf8d2be782c6b73c01622d52f2da9b07ecff39e0 SHA512 7764d49343b795b6bebae64f646ba27e3e6cc2a20b8a1aee645ce0d8474633c34acfbb73c08546fee415755dd4ea5a98c1d84db5e394cf5f4fc802eb61148ab6
 DIST llvm-gentoo-patchset-13.0.1-rc1.tar.xz 5988 BLAKE2B 8f1d295d4b6937518d9e0cc00cc2ba9e12ff9773b35261f0985b2d2a4ed1e3363a7f961cb385728b5ae552d0e129d99d11e63958d32c3353b0a79a88ba5cc0d5 SHA512 8272c423a5e0e99d412bb449794ba2e8134aca69d09e90e93555dbd3b7549d6ce4d68617ca11074af0a35a6f6830bf0330cbc672c5a56054cfd824e3ac1900ea
+DIST llvm-gentoo-patchset-13.0.1-rc2.tar.xz 5192 BLAKE2B 4a129a3d0b7c1839d79c814ea57602f5e87aadb9050fc8e91868d2c3773ff7ae8e2137f785deeded6925a4368220767526c95790c9883f2031edc3ebae25b13c SHA512 2f384281d06f5378f7d1b2f036958c7db00d1c4d799406fd188fa8388f0cf18279dae36f2fb37bff26daa91419ab1bc1c2390be0f3af42359f1aef8de81b6ac8
 DIST llvm-gentoo-patchset-9999-1.tar.xz 4032 BLAKE2B b9413484dafed8ae0c68c2c164b45fd07bb8d5d0898f03abe118fd2120ffcb1fb6c949de9649a97c2e8105f24b9d131a725c67c0a502ca4d4d192c1a0d65f49d SHA512 e64449eeaf756c5bd945109937b84ba4bd8a015222bd792d39cf3947871e87571a4ca57814790e51544cb05ad4c2d1f044e818e4caaac7c2e2a02cb1aa290fcc
 DIST llvmorg-11.1.0.tar.gz 122776532 BLAKE2B ca842ff4afff8f44c82b5e7383962a9c45ca1c93b64fa4c6ebcd70a1d3849dbad2b8e4e24fba02d144c6266d7fab3607ebc6999b28c229cb35256cf40f26a985 SHA512 9a8ce022a935eed42fa71a224f2a207122aadcbef58ee855fdb4825f879e7d028e4dcff22c19b9d336db1c8bf63fb84372d44981acf84615f757e54306c92b81
 DIST llvmorg-12.0.1.tar.gz 134259748 BLAKE2B f41de787bc73ff2edfda1b22cc8602be6f65f37dd9e4c8888533cfa8c3ccdcf4f108aaab9de23ab0ab987966eb160f2a553a0bdff99461e71ddd5bfcd086090d SHA512 6eb0dc18e2c25935fabfdfc48b0114be0939158dfdef7b85b395fe2e71042672446af0e68750aae003c9847d10d1f63316fe95d3df738d18f249174292b1b9e1
 DIST llvmorg-13.0.0.tar.gz 147270176 BLAKE2B 628f316b580e1edf3a58d4825b724df759e6ed2a4116802470c04562caefc392fa325c91f388036365a2e45a9595cca6d3557fab12984fc8bcfef29c9116d822 SHA512 8004c05d32b9720fb3391783621690c1df9bd1e97e72cbff9192ed88a84b0acd303b61432145fa917b5b5e548c8cee29b24ef8547dcc8677adf4816e7a8a0eb2
 DIST llvmorg-13.0.1-rc1.tar.gz 147284646 BLAKE2B 3a1d8d382de633b7f8fc998f8ad1e03c24b733aefc591615cbd34115d1d6d74962ae33bbf2224527b521a76930ffee425527225563a558a04173e9aa9487c781 SHA512 d487bfc9b898ad0046e0c94338d7757d8a05a1a84d683abfbc9ed4994c6d12caf88fd18575225e284070fc67b3ac0970ca6639e61b1a7cc2948b216a5364a22d
+DIST llvmorg-13.0.1-rc2.tar.gz 147304491 BLAKE2B 86b2c64e57e4aaab837229b25a95d5517ac077d22cf552d71ff6b996dbdbcd171ad51de7eb12d098b50a139beda4ace843727181a1c6978fc487215391e64a3a SHA512 0d890f3317504c8cef10e118b245e5a4c815cc19f07cbc511a66bde6c9b1f3d15c167942608a8987befe9115b24657d29f72305f9f2794385a7434b80167f40f
 EBUILD llvm-11.1.0.ebuild 12490 BLAKE2B 17ec5620c4b1d155deb6a2b14dc49c6a439dc595b457b73d2e3f112fc913d6b7eb475b34284bd61a1bc7f8771069e54dff2a4888b762a43b3b62acd9c7b5abbe SHA512 f918a32bb9417186d127910d12766613554eff3127f50f4b4d7824ecb4b87ae9139fe8a30bf4a3779168dd10565869ee674c943b32c7b49762848ae3d2cf26f1
 EBUILD llvm-12.0.1.ebuild 12606 BLAKE2B 58c112a32620c890d2c7d88d8d6d8fcac961adad27033d23bb78b3b2e68497fddb9c0be1400c318ccc95a0d54a4aedaee1130fa45a389a98b2c00d29cfe60905 SHA512 283685e0186ccf6bcf40ce96165fe6ff52fdeed156da4d87f760c9c4ed5dffdee143a72363e133941898b2ebe5ef78359051b7af4bf138620cb207a19beae9b2
 EBUILD llvm-13.0.0.ebuild 12172 BLAKE2B 45cd85048de3487a9d9274031fdffd33956df69b1050563017f0a183ea76a44c1f62f588d715496ff121e07412ef8d4c7a723830494f59fff12700120793deb1 SHA512 3c180cdd684326a8dcf4ce2c1f3ce8dede7f31e534d2526ba7da539b42626057ab06acd2597735f91ee569bcada637e3ecbd868d53fcc18f19356f93d074ea54
 EBUILD llvm-13.0.1.9999.ebuild 12149 BLAKE2B 7cc44ed170ebcfb1fdda7be1380c80b7c59888e24ebe860beb935fba820c4473b49461f19545a123b3e7c598cca7c0541620bce754930c2733b833bb50a3b7c7 SHA512 c8637e532ba07e00afe72df782c8a41289d352cbd904e05a6503a56199ac4d51d913c172958e008654356da800767df55aeaeac0ff06e9bfeda350cd3bc29a84
 EBUILD llvm-13.0.1_rc1.ebuild 12152 BLAKE2B ef0e60da0b7875e2347cb7e12f6f0fe221ec03fc3af9b1e2d91a06220fda1136315150db3e61c95286544f510ee02cd09e6f4602afad081dedc4ee4794951376 SHA512 4df2950d660acf15eb63e9680903f4c81175f1a7910fa89c73260a5e95b235c8b74cd4eb2d4ad2c695c1fc2290241c7833ab12443c65fa8710318149659da3cd
+EBUILD llvm-13.0.1_rc2.ebuild 12152 BLAKE2B ef0e60da0b7875e2347cb7e12f6f0fe221ec03fc3af9b1e2d91a06220fda1136315150db3e61c95286544f510ee02cd09e6f4602afad081dedc4ee4794951376 SHA512 4df2950d660acf15eb63e9680903f4c81175f1a7910fa89c73260a5e95b235c8b74cd4eb2d4ad2c695c1fc2290241c7833ab12443c65fa8710318149659da3cd
 EBUILD llvm-14.0.0.9999.ebuild 12161 BLAKE2B a5a54339b16268303910d999adbebfc7360fdb8867670d0239486496df9d21d1686e7a154902709315bb677d1400d2271e338bbcf8da6e91fb9d5f2b751a84b8 SHA512 d94ccb772593db7f926dff66249d7d4bc6a8dfadf3a378c96e897f66dc12d1f40551a2a4889b40c277193949801abb6be506c9acae57c527fb050d17b61cf414
 MISC metadata.xml 2625 BLAKE2B 1017e4672b3ccd5a4f83d9df6a9db3661f548da9d75ad2c5b63e9843bfd737ff1fb64624678704f632544ac403efd8dbb35a006542023153733a6d4037b7245d SHA512 130444ec537891dc43754057c5a68666f52cb2959f351ee5be076ed41e39d49d8fafa2d0dca78d1a751b3a3190db81910b4472e75f9bad571ae42da51a5b25dd
diff --git a/sys-devel/llvm/llvm-13.0.1_rc2.ebuild b/sys-devel/llvm/llvm-13.0.1_rc2.ebuild
new file mode 100644
index 000000000000..f5d3be283708
--- /dev/null
+++ b/sys-devel/llvm/llvm-13.0.1_rc2.ebuild
@@ -0,0 +1,510 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{8..10} )
+inherit cmake llvm.org multilib-minimal pax-utils python-any-r1 \
+	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="$(ver_cut 1)"
+KEYWORDS=""
+IUSE="+binutils-plugin debug doc exegesis libedit +libffi ncurses test xar xml z3"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	sys-libs/zlib:0=[${MULTILIB_USEDEP}]
+	binutils-plugin? ( >=sys-devel/binutils-2.31.1-r4:*[plugins] )
+	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=[${MULTILIB_USEDEP}] )
+	xar? ( app-arch/xar )
+	xml? ( dev-libs/libxml2:2=[${MULTILIB_USEDEP}] )
+	z3? ( >=sci-mathematics/z3-4.7.1:0=[${MULTILIB_USEDEP}] )"
+DEPEND="${RDEPEND}
+	binutils-plugin? ( sys-libs/binutils-libs )"
+BDEPEND="
+	dev-lang/perl
+	>=dev-util/cmake-3.16
+	sys-devel/gnuconfig
+	kernel_Darwin? (
+		<sys-libs/libcxx-$(ver_cut 1-3).9999
+		>=sys-devel/binutils-apple-5.1
+	)
+	doc? ( $(python_gen_any_dep '
+		dev-python/recommonmark[${PYTHON_USEDEP}]
+		dev-python/sphinx[${PYTHON_USEDEP}]
+	') )
+	libffi? ( virtual/pkgconfig )
+	${PYTHON_DEPS}"
+# There are no file collisions between these versions but having :0
+# installed means llvm-config there will take precedence.
+RDEPEND="${RDEPEND}
+	!sys-devel/llvm:0"
+PDEPEND="sys-devel/llvm-common
+	binutils-plugin? ( >=sys-devel/llvmgold-${SLOT} )"
+
+LLVM_COMPONENTS=( llvm )
+LLVM_MANPAGES=build
+LLVM_PATCHSET=${PV/_/-}
+LLVM_USE_TARGETS=provide
+llvm.org_set_globals
+
+python_check_deps() {
+	use doc || return 0
+
+	has_version -b "dev-python/recommonmark[${PYTHON_USEDEP}]" &&
+	has_version -b "dev-python/sphinx[${PYTHON_USEDEP}]"
+}
+
+check_live_ebuild() {
+	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 ${l} in
+					# shared libs
+					LLVM|LLVMgold)
+						;;
+					# TableGen lib + deps
+					LLVMDemangle|LLVMSupport|LLVMTableGen)
+						;;
+					# static libs
+					LLVM*)
+						continue
+						;;
+					# meta-targets
+					distribution|llvm-libraries)
+						continue
+						;;
+					# used only w/ USE=doc
+					docs-llvm-html)
+						use doc || continue
+						;;
+				esac
+
+				all_targets+=( "${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 live ebuild is up-to-date
+	check_live_ebuild
+
+	llvm.org_src_prepare
+}
+
+# Is LLVM being linked against libc++?
+is_libcxx_linked() {
+	local code='#include <ciso646>
+#if defined(_LIBCPP_VERSION)
+	HAVE_LIBCXX
+#endif
+'
+	local out=$($(tc-getCXX) ${CXXFLAGS} ${CPPFLAGS} -x c++ -E -P - <<<"${code}") || return 1
+
+	[[ ${out} == *HAVE_LIBCXX* ]]
+}
+
+get_distribution_components() {
+	local sep=${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
+	)
+
+	if multilib_is_native_abi; then
+		out+=(
+			# utilities
+			llvm-tblgen
+			FileCheck
+			llvm-PerfectShuffle
+			count
+			not
+			yaml-bench
+
+			# 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-diff
+			llvm-dis
+			llvm-dlltool
+			llvm-dwarfdump
+			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-reduce
+			llvm-rtdyld
+			llvm-sim
+			llvm-size
+			llvm-split
+			llvm-stress
+			llvm-strings
+			llvm-strip
+			llvm-symbolizer
+			llvm-tapi-diff
+			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
+		)
+	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/${SLOT}"
+		-DLLVM_LIBDIR_SUFFIX=${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_BUILD_TESTS=$(usex test)
+
+		-DLLVM_ENABLE_FFI=$(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_HOST_TRIPLE="${CHOST}"
+
+		-DFFI_INCLUDE_DIR="${ffi_cflags#-I}"
+		-DFFI_LIBRARY_DIR="${ffi_ldflags#-L}"
+		# used only for llvm-objdump tool
+		-DLLVM_HAVE_LIBXAR=$(multilib_native_usex xar 1 0)
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+
+		# disable OCaml bindings (now in dev-ml/llvm-ocaml)
+		-DOCAMLFIND=NO
+	)
+
+	if is_libcxx_linked; then
+		# Smart hack: alter version suffix -> SOVERSION when linking
+		# against libc++. This way we won't end up mixing LLVM libc++
+		# libraries with libstdc++ clang, and the other way around.
+		mycmakeargs+=(
+			-DLLVM_VERSION_SUFFIX="libcxx"
+			-DLLVM_ENABLE_LIBCXX=ON
+		)
+	fi
+
+#	Note: go bindings have no CMake rules at the moment
+#	but let's kill the check in case they are introduced
+#	if ! multilib_is_native_abi || ! use go; then
+		mycmakeargs+=(
+			-DGO_EXECUTABLE=GO_EXECUTABLE-NOTFOUND
+		)
+#	fi
+
+	use test && mycmakeargs+=(
+		-DLLVM_LIT_ARGS="$(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="${EPREFIX}/usr/lib/llvm/${SLOT}/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="${EPREFIX}"/usr/include
+		)
+	fi
+
+	if tc-is-cross-compiler; then
+		local tblgen="${EPREFIX}/usr/lib/llvm/${SLOT}/bin/llvm-tblgen"
+		[[ -x "${tblgen}" ]] \
+			|| die "${tblgen} not found or usable"
+		mycmakeargs+=(
+			-DCMAKE_CROSSCOMPILING=ON
+			-DLLVM_TABLEGEN="${tblgen}"
+		)
+	fi
+
+	# 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="${CPPFLAGS} -DNDEBUG"
+	cmake_src_configure
+
+	multilib_is_native_abi && check_distribution_components
+}
+
+multilib_src_compile() {
+	cmake_build distribution
+
+	pax-mark m "${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 "${BUILD_DIR}"/unittests/Support/SupportTests
+	fi
+}
+
+multilib_src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check
+}
+
+src_install() {
+	local MULTILIB_CHOST_TOOLS=(
+		/usr/lib/llvm/${SLOT}/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/${SLOT}/include || die
+}
+
+multilib_src_install() {
+	DESTDIR=${D} cmake_build install-distribution
+
+	# move headers to /usr/include for wrapping
+	rm -rf "${ED}"/usr/include || die
+	mv "${ED}"/usr/lib/llvm/${SLOT}/include "${ED}"/usr/include || die
+
+	LLVM_LDPATHS+=( "${EPREFIX}/usr/lib/llvm/${SLOT}/$(get_libdir)" )
+}
+
+multilib_src_install_all() {
+	local revord=$(( 9999 - ${SLOT} ))
+	newenvd - "60llvm-${revord}" <<-_EOF_
+		PATH="${EPREFIX}/usr/lib/llvm/${SLOT}/bin"
+		# we need to duplicate it in ROOTPATH for Portage to respect...
+		ROOTPATH="${EPREFIX}/usr/lib/llvm/${SLOT}/bin"
+		MANPATH="${EPREFIX}/usr/lib/llvm/${SLOT}/share/man"
+		LDPATH="$( IFS=:; echo "${LLVM_LDPATHS[*]}" )"
+	_EOF_
+
+	docompress "/usr/lib/llvm/${SLOT}/share/man"
+	llvm_install_manpages
+}
+
+pkg_postinst() {
+	elog "You can find additional opt-viewer utility scripts in:"
+	elog "  ${EROOT}/usr/lib/llvm/${SLOT}/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)"
+}