[gentoo-commits] repo/gentoo:master commit in: llvm-core/clang-runtime/

["Michał Górny" <mgorny@gentoo.org>]

commit:     48f104e91c85fe0f6642f17f8e0652e086f63b82
Author:     Michał Górny <mgorny <AT> gentoo <DOT> org>
AuthorDate: Sun Dec 29 16:30:19 2024 +0000
Commit:     Michał Górny <mgorny <AT> gentoo <DOT> org>
CommitDate: Wed Mar  5 13:05:13 2025 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=48f104e9

llvm-core/clang-runtime: Install minimal per-slot configs

Install per-slot config files.  They include the top-level configs
from llvm-core/clang-common and override runtimes.

Signed-off-by: Michał Górny <mgorny <AT> gentoo.org>

 .../clang-runtime/clang-runtime-21.0.0.9999.ebuild | 95 +++++++++++++++++++++-
 llvm-core/clang-runtime/metadata.xml               |  4 +
 2 files changed, 96 insertions(+), 3 deletions(-)

diff --git a/llvm-core/clang-runtime/clang-runtime-21.0.0.9999.ebuild b/llvm-core/clang-runtime/clang-runtime-21.0.0.9999.ebuild
index 542c7b28a6f4..1cf7f46d4148 100644
--- a/llvm-core/clang-runtime/clang-runtime-21.0.0.9999.ebuild
+++ b/llvm-core/clang-runtime/clang-runtime-21.0.0.9999.ebuild
@@ -3,15 +3,21 @@
 
 EAPI=8
 
-inherit multilib-build
+inherit multilib-build toolchain-funcs
 
 DESCRIPTION="Meta-ebuild for clang runtime libraries"
 HOMEPAGE="https://clang.llvm.org/"
+S=${WORKDIR}
 
 LICENSE="metapackage"
 SLOT="${PV%%.*}"
-IUSE="+compiler-rt libcxx offload openmp +sanitize"
-REQUIRED_USE="sanitize? ( compiler-rt )"
+IUSE="
+	+compiler-rt libcxx offload openmp +sanitize
+	default-compiler-rt default-libcxx default-lld llvm-libunwind
+"
+REQUIRED_USE="
+	sanitize? ( compiler-rt )
+"
 
 RDEPEND="
 	compiler-rt? (
@@ -27,4 +33,87 @@ RDEPEND="
 			>=llvm-runtimes/offload-${PV}
 		)
 	)
+
+	llvm-core/clang-common
+	default-compiler-rt? (
+		~llvm-runtimes/compiler-rt-${PV}:${SLOT}[abi_x86_32(+)?,abi_x86_64(+)?]
+		llvm-libunwind? ( llvm-runtimes/libunwind[static-libs] )
+		!llvm-libunwind? ( sys-libs/libunwind[static-libs] )
+	)
+	!default-compiler-rt? ( sys-devel/gcc )
+	default-libcxx? ( >=llvm-runtimes/libcxx-${PV}[static-libs] )
+	!default-libcxx? ( sys-devel/gcc )
+	default-lld? ( ~llvm-core/lld-${PV} )
+	!default-lld? ( sys-devel/binutils )
 "
+
+_doclang_cfg() {
+	local triple="${1}"
+
+	local tool
+	for tool in ${triple}-clang{,++,-cpp}; do
+		newins - "${tool}.cfg" <<-EOF
+			# This configuration file is used by ${tool} driver.
+			@../${tool}.cfg
+			@gentoo-runtimes.cfg
+		EOF
+	done
+
+	# 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/${SLOT}/${vendor_triple}-${tool}.cfg" ]]; then
+				dosym "${triple}-${tool}.cfg" "/etc/clang/${SLOT}/${vendor_triple}-${tool}.cfg"
+			fi
+		done
+	done
+}
+
+doclang_cfg() {
+	local triple=$(get_abi_CHOST "${abi}")
+
+	_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() {
+	insinto "/etc/clang/${SLOT}"
+	newins - gentoo-runtimes.cfg <<-EOF
+		# This file is initially generated by llvm-core/clang-runtime.
+		# It is used to control the default runtimes using by clang.
+
+		--rtlib=$(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
+
+	multilib_foreach_abi doclang_cfg
+}

diff --git a/llvm-core/clang-runtime/metadata.xml b/llvm-core/clang-runtime/metadata.xml
index 2167c069cc50..e7a356772fe4 100644
--- a/llvm-core/clang-runtime/metadata.xml
+++ b/llvm-core/clang-runtime/metadata.xml
@@ -10,6 +10,10 @@
 		<flag name="offload">Install <pkg>llvm-runtimes/offload</pkg> for -fopenmp GPU offloading</flag>
 		<flag name="openmp">Install <pkg>llvm-runtimes/openmp</pkg> for -fopenmp support</flag>
 		<flag name="sanitize">Enable compiler-rt sanitizer (-fsanitize*) support</flag>
+
+		<flag name="default-compiler-rt">Use compiler-rt + libunwind instead of libgcc as the default rtlib for clang</flag>
+		<flag name="default-libcxx">Use libc++ instead of libstdc++ as the default stdlib for clang</flag>
+		<flag name="default-lld">Use lld as the default linker for clang</flag>
 	</use>
 	<upstream>
 		<remote-id type="github">llvm/llvm-project</remote-id>