sys-devel/mold: backport musl test fix

Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 151 insertions, 0 deletions

diff --git a/sys-devel/mold/files/mold-2.0.0-reloc-test-fix.patch b/sys-devel/mold/files/mold-2.0.0-reloc-test-fix.patch
new file mode 100644
index 000000000000..8e6e04f5d535
--- /dev/null
+++ b/sys-devel/mold/files/mold-2.0.0-reloc-test-fix.patch
@@ -0,0 +1,58 @@
+https://github.com/rui314/mold/issues/1067
+https://github.com/rui314/mold/commit/1582b720d58df61bc4c0ae39fa269e3b250b94df
+
+From 1582b720d58df61bc4c0ae39fa269e3b250b94df Mon Sep 17 00:00:00 2001
+From: Rui Ueyama <ruiu@bluewhale.systems>
+Date: Fri, 28 Jul 2023 14:58:57 +0900
+Subject: [PATCH] Weak undefs should not keep DSOs alive
+
+Fixes https://github.com/rui314/mold/issues/1067
+--- a/elf/input-files.cc
++++ b/elf/input-files.cc
+@@ -1396,7 +1396,8 @@ SharedFile<E>::mark_live_objects(Context<E> &ctx,
+     if (sym.is_traced)
+       print_trace_symbol(ctx, *this, esym, sym);
+ 
+-    if (esym.is_undef() && sym.file && !sym.file->is_alive.test_and_set()) {
++    if (esym.is_undef() && !esym.is_weak() && sym.file &&
++        !sym.file->is_alive.test_and_set()) {
+       feeder(sym.file);
+ 
+       if (sym.is_traced)
+--- /dev/null
++++ b/test/elf/as-needed-dso2.sh
+@@ -0,0 +1,33 @@
++#!/bin/bash
++. $(dirname $0)/common.inc
++
++cat <<EOF | $CC -c -fPIC -o $t/a.o -xc -
++int foo() {
++  return 0;
++}
++EOF
++
++cat <<EOF | $CC -c -fPIC -o $t/b.o -xc -
++__attribute__((weak)) int foo();
++
++int bar() {
++  if (foo) return foo();
++  return 0;
++}
++EOF
++
++cat <<EOF | $CC -xc -c -o $t/c.o -
++int bar();
++
++int main() {
++  return bar();
++}
++EOF
++
++$CC -B. -shared -o $t/libfoo.so $t/a.o
++$CC -B. -shared -o $t/libbar.so $t/b.o
++$CC -B. -o $t/exe $t/c.o -L$t -Wl,--as-needed -lfoo -lbar
++
++readelf --dynamic $t/exe > $t/log
++! grep libfoo.so $t/log || false
++grep -q libbar.so $t/log
+
diff --git a/sys-devel/mold/mold-2.0.0-r1.ebuild b/sys-devel/mold/mold-2.0.0-r1.ebuild
new file mode 100644
index 000000000000..6d863f669627
--- /dev/null
+++ b/sys-devel/mold/mold-2.0.0-r1.ebuild
@@ -0,0 +1,93 @@
+# Copyright 2021-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake toolchain-funcs
+
+DESCRIPTION="A Modern Linker"
+HOMEPAGE="https://github.com/rui314/mold"
+if [[ ${PV} == 9999 ]] ; then
+	EGIT_REPO_URI="https://github.com/rui314/mold.git"
+	inherit git-r3
+else
+	SRC_URI="https://github.com/rui314/mold/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+	KEYWORDS="~amd64 ~arm64 ~ppc64 ~riscv ~x86"
+fi
+
+# mold (MIT)
+#  - xxhash (BSD-2)
+LICENSE="MIT BSD-2"
+SLOT="0"
+
+RDEPEND="
+	app-arch/zstd:=
+	>=dev-cpp/tbb-2021.7.0-r1:=
+	sys-libs/zlib
+	!kernel_Darwin? (
+		>=dev-libs/mimalloc-2:=
+		dev-libs/openssl:=
+	)
+"
+DEPEND="${RDEPEND}"
+
+PATCHES=(
+	"${FILESDIR}"/${P}-reloc-test-fix.patch
+)
+
+pkg_pretend() {
+	# Requires a c++20 compiler, see #831473
+	if [[ ${MERGE_TYPE} != binary ]]; then
+		if tc-is-gcc && [[ $(gcc-major-version) -lt 10 ]]; then
+			die "${PN} needs at least gcc 10"
+		elif tc-is-clang && [[ $(clang-major-version) -lt 12 ]]; then
+			die "${PN} needs at least clang 12"
+		fi
+	fi
+}
+
+src_prepare() {
+	cmake_src_prepare
+
+	# Needs unpackaged dwarfdump
+	rm test/elf/{{dead,compress}-debug-sections,compressed-debug-info}.sh || die
+
+	# Heavy tests, need qemu
+	rm test/elf/gdb-index-{compress-output,dwarf{2,3,4,5}}.sh || die
+	rm test/elf/lto-{archive,dso,gcc,llvm,version-script}.sh || die
+
+	# Sandbox sadness
+	rm test/elf/run.sh || die
+	sed -i 's|`pwd`/mold-wrapper.so|"& ${LD_PRELOAD}"|' \
+		test/elf/mold-wrapper{,2}.sh || die
+
+	# static-pie tests require glibc built with static-pie support
+	if ! has_version -d 'sys-libs/glibc[static-pie(+)]'; then
+		rm test/elf/{,ifunc-}static-pie.sh || die
+	fi
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DMOLD_ENABLE_QEMU_TESTS=OFF
+		-DMOLD_LTO=OFF # Should be up to the user to decide this with CXXFLAGS.
+		-DMOLD_USE_SYSTEM_MIMALLOC=ON
+		-DMOLD_USE_SYSTEM_TBB=ON
+	)
+	cmake_src_configure
+}
+
+src_install() {
+	dobin "${BUILD_DIR}"/${PN}
+
+	# https://bugs.gentoo.org/872773
+	insinto /usr/$(get_libdir)/mold
+	doins "${BUILD_DIR}"/${PN}-wrapper.so
+
+	dodoc docs/{design,execstack}.md
+	doman docs/${PN}.1
+
+	dosym ${PN} /usr/bin/ld.${PN}
+	dosym ${PN} /usr/bin/ld64.${PN}
+	dosym ../../../usr/bin/${PN} /usr/libexec/${PN}/ld
+}