sys-devel/binutils: apply linker search path fixes from Chewi for prefix

Quoting Chewi on the PR for posterity:
"""
The first of these changes fixes two related issues with prefixed and crossdev environments.
The prefix issue is detailed in Gentoo bug #892549. The crossdev issue can be reproduced by trying something like:

USE="-python icu" aarch64-unknown-linux-gnu-emerge libxml2

The second of these changes is not essential, but it does make bfd's behaviour
in this area more consistent with the other linkers, which have not experienced these issues at all.

I'm not sure what upstream will make of these changes, particularly the second one,
but it is interesting that even gold does not behave the same way as bfd here.

Perhaps we can give them some exposure in Gentoo for a while before seeing what they think.
The second change would not be submitted upstream as-is because fully removing the ld.so.conf feature is a much bigger diff.
"""

This patch is, for now, only applied for prefix. It should be safe
on other systems but the issue is more pressing on prefix given a recent
migration.

Bug: https://bugs.gentoo.org/892549
Thanks-to: James Le Cuirot <chewi@gentoo.org>
Signed-off-by: Sam James <sam@gentoo.org>

3 files changed, 584 insertions, 5 deletions

diff --git a/sys-devel/binutils/binutils-2.40-r2.ebuild b/sys-devel/binutils/binutils-2.40-r2.ebuild
new file mode 100644
index 000000000000..d8c2553ece20
--- /dev/null
+++ b/sys-devel/binutils/binutils-2.40-r2.ebuild
@@ -0,0 +1,503 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit libtool flag-o-matic gnuconfig strip-linguas toolchain-funcs
+
+DESCRIPTION="Tools necessary to build programs"
+HOMEPAGE="https://sourceware.org/binutils/"
+
+LICENSE="GPL-3+"
+IUSE="cet doc gold gprofng multitarget +nls pgo +plugins static-libs test vanilla zstd"
+
+# Variables that can be set here  (ignored for live ebuilds)
+# PATCH_VER          - the patchset version
+#                      Default: empty, no patching
+# PATCH_BINUTILS_VER - the binutils version in the patchset name
+#                    - Default: PV
+# PATCH_DEV          - Use download URI https://dev.gentoo.org/~{PATCH_DEV}/distfiles/...
+#                      for the patchsets
+
+PATCH_VER=2
+PATCH_DEV=dilfridge
+
+if [[ ${PV} == 9999* ]]; then
+	inherit git-r3
+	SLOT=${PV}
+else
+	PATCH_BINUTILS_VER=${PATCH_BINUTILS_VER:-${PV}}
+	PATCH_DEV=${PATCH_DEV:-dilfridge}
+	SRC_URI="mirror://gnu/binutils/binutils-${PV}.tar.xz https://sourceware.org/pub/binutils/releases/binutils-${PV}.tar.xz https://dev.gentoo.org/~${PATCH_DEV}/distfiles/binutils-${PV}.tar.xz"
+	[[ -z ${PATCH_VER} ]] || SRC_URI="${SRC_URI}
+		https://dev.gentoo.org/~${PATCH_DEV}/distfiles/binutils-${PATCH_BINUTILS_VER}-patches-${PATCH_VER}.tar.xz"
+	SLOT=$(ver_cut 1-2)
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+fi
+
+#
+# The cross-compile logic
+#
+export CTARGET=${CTARGET:-${CHOST}}
+if [[ ${CTARGET} == ${CHOST} ]] ; then
+	if [[ ${CATEGORY} == cross-* ]] ; then
+		export CTARGET=${CATEGORY#cross-}
+	fi
+fi
+is_cross() { [[ ${CHOST} != ${CTARGET} ]] ; }
+
+#
+# The dependencies
+#
+RDEPEND="
+	>=sys-devel/binutils-config-3
+	sys-libs/zlib
+	zstd? ( app-arch/zstd:= )
+"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	doc? ( sys-apps/texinfo )
+	test? (
+		dev-util/dejagnu
+		sys-devel/bc
+	)
+	nls? ( sys-devel/gettext )
+	zstd? ( virtual/pkgconfig )
+	sys-devel/flex
+	app-alternatives/yacc
+"
+
+RESTRICT="!test? ( test )"
+
+MY_BUILDDIR=${WORKDIR}/build
+
+src_unpack() {
+	if [[ ${PV} == 9999* ]] ; then
+		EGIT_REPO_URI="https://anongit.gentoo.org/git/proj/toolchain/binutils-patches.git"
+		EGIT_CHECKOUT_DIR=${WORKDIR}/patches-git
+		git-r3_src_unpack
+		mv patches-git/9999 patch || die
+
+		EGIT_REPO_URI="https://sourceware.org/git/binutils-gdb.git"
+		S=${WORKDIR}/binutils
+		EGIT_CHECKOUT_DIR=${S}
+		git-r3_src_unpack
+	else
+		unpack ${P/-hppa64/}.tar.xz
+
+		cd "${WORKDIR}" || die
+		unpack binutils-${PATCH_BINUTILS_VER}-patches-${PATCH_VER}.tar.xz
+
+		# _p patch versions are Gentoo specific tarballs ...
+		local dir=${P%_p?}
+		dir=${dir/-hppa64/}
+
+		S=${WORKDIR}/${dir}
+	fi
+
+	cd "${WORKDIR}" || die
+	mkdir -p "${MY_BUILDDIR}" || die
+}
+
+src_prepare() {
+	local patchsetname
+	if [[ ${PV} == 9999* ]] ; then
+		patchsetname="from git master"
+	else
+		patchsetname="${PATCH_BINUTILS_VER}-${PATCH_VER}"
+	fi
+
+	if [[ -n ${PATCH_VER} ]] || [[ ${PV} == 9999* ]] ; then
+		if ! use vanilla; then
+			einfo "Applying binutils patchset ${patchsetname}"
+			eapply "${WORKDIR}/patch"
+			einfo "Done."
+
+			# This is applied conditionally for now just out of caution.
+			# It should be okay on non-prefix systems though. See bug #892549.
+			use prefix && eapply "${FILESDIR}"/binutils-2.40-linker-search-path.patch
+		fi
+	fi
+
+	# Make sure our explicit libdir paths don't get clobbered, bug #562460
+	sed -i \
+		-e 's:@bfdlibdir@:@libdir@:g' \
+		-e 's:@bfdincludedir@:@includedir@:g' \
+		{bfd,opcodes}/Makefile.in || die
+
+	# Fix locale issues if possible, bug #122216
+	if [[ -e ${FILESDIR}/binutils-configure-LANG.patch ]] ; then
+		einfo "Fixing misc issues in configure files"
+		for f in $(find "${S}" -name configure -exec grep -l 'autoconf version 2.13' {} +) ; do
+			ebegin "  Updating ${f/${S}\/}"
+			patch "${f}" "${FILESDIR}"/binutils-configure-LANG.patch >& "${T}"/configure-patch.log \
+				|| eerror "Please file a bug about this"
+			eend $?
+		done
+	fi
+
+	# Apply things from PATCHES and user dirs
+	default
+
+	# Run misc portage update scripts
+	gnuconfig_update
+	elibtoolize --portage --no-uclibc
+}
+
+toolchain-binutils_bugurl() {
+	printf "https://bugs.gentoo.org/"
+}
+toolchain-binutils_pkgversion() {
+	printf "Gentoo ${PV}"
+	[[ -n ${PATCH_VER} ]] && printf " p${PATCH_VER}"
+}
+
+src_configure() {
+	# See https://www.gnu.org/software/make/manual/html_node/Parallel-Output.html
+	# Avoid really confusing logs from subconfigure spam, makes logs far
+	# more legible.
+	MAKEOPTS="--output-sync=line ${MAKEOPTS}"
+
+	# Setup some paths
+	LIBPATH=/usr/$(get_libdir)/binutils/${CTARGET}/${PV}
+	INCPATH=${LIBPATH}/include
+	DATAPATH=/usr/share/binutils-data/${CTARGET}/${PV}
+	if is_cross ; then
+		TOOLPATH=/usr/${CHOST}/${CTARGET}
+	else
+		TOOLPATH=/usr/${CTARGET}
+	fi
+	BINPATH=${TOOLPATH}/binutils-bin/${PV}
+
+	# Make sure we filter $LINGUAS so that only ones that
+	# actually work make it through, bug #42033
+	strip-linguas -u */po
+
+	# Keep things sane
+	strip-flags
+	use cet && filter-flags -mindirect-branch -mindirect-branch=*
+	use elibc_musl && append-ldflags -Wl,-z,stack-size=2097152
+
+	# ideally we want !tc-ld-is-bfd for best future-proofing, but it needs
+	# https://github.com/gentoo/gentoo/pull/28355
+	# mold needs this too but right now tc-ld-is-mold is also not available
+	if tc-ld-is-lld; then
+		append-ldflags -Wl,--undefined-version
+	fi
+
+	local x
+	echo
+	for x in CATEGORY CBUILD CHOST CTARGET CFLAGS LDFLAGS ; do
+		einfo "$(printf '%10s' ${x}:) ${!x}"
+	done
+	echo
+
+	cd "${MY_BUILDDIR}" || die
+	local myconf=()
+
+	if use plugins ; then
+		myconf+=( --enable-plugins )
+	fi
+	# enable gold (installed as ld.gold) and ld's plugin architecture
+	if use gold ; then
+		myconf+=( --enable-gold )
+	fi
+
+	if use nls ; then
+		myconf+=( --without-included-gettext )
+	else
+		myconf+=( --disable-nls )
+	fi
+
+	myconf+=( --with-system-zlib )
+
+	# For bi-arch systems, enable a 64bit bfd. This matches the bi-arch
+	# logic in toolchain.eclass. bug #446946
+	#
+	# We used to do it for everyone, but it's slow on 32bit arches. bug #438522
+	case $(tc-arch) in
+		ppc|sparc|x86) myconf+=( --enable-64-bit-bfd ) ;;
+	esac
+
+	use multitarget && myconf+=( --enable-targets=all --enable-64-bit-bfd )
+
+	[[ -n ${CBUILD} ]] && myconf+=( --build=${CBUILD} )
+
+	is_cross && myconf+=(
+		--with-sysroot="${EPREFIX}"/usr/${CTARGET}
+		--enable-poison-system-directories
+	)
+
+	myconf+=( --enable-secureplt )
+
+	# mips can't do hash-style=gnu ...
+	if [[ $(tc-arch) != mips ]] ; then
+		myconf+=( --enable-default-hash-style=gnu )
+	fi
+
+	myconf+=(
+		--prefix="${EPREFIX}"/usr
+		--host=${CHOST}
+		--target=${CTARGET}
+		--datadir="${EPREFIX}"${DATAPATH}
+		--datarootdir="${EPREFIX}"${DATAPATH}
+		--infodir="${EPREFIX}"${DATAPATH}/info
+		--mandir="${EPREFIX}"${DATAPATH}/man
+		--bindir="${EPREFIX}"${BINPATH}
+		--libdir="${EPREFIX}"${LIBPATH}
+		--libexecdir="${EPREFIX}"${LIBPATH}
+		--includedir="${EPREFIX}"${INCPATH}
+		--enable-obsolete
+		--enable-shared
+		--enable-threads
+		# Newer versions (>=2.27) offer a configure flag now.
+		--enable-relro
+		# Newer versions (>=2.24) make this an explicit option, bug #497268
+		--enable-install-libiberty
+		# Available from 2.35 on
+		--enable-textrel-check=warning
+
+		# These hardening options are available from 2.39+ but
+		# they unconditionally enable the behaviour even on arches
+		# where e.g. execstacks can't be avoided.
+		# See https://sourceware.org/bugzilla/show_bug.cgi?id=29592.
+		#--enable-warn-execstack
+		#--enable-warn-rwx-segments
+		#--disable-default-execstack (or is it --enable-default-execstack=no? docs are confusing)
+
+		# Things to think about
+		#--enable-deterministic-archives
+
+		# Works better than vapier's patch, bug #808787
+		--enable-new-dtags
+
+		--disable-jansson
+		--disable-werror
+		--with-bugurl="$(toolchain-binutils_bugurl)"
+		--with-pkgversion="$(toolchain-binutils_pkgversion)"
+		$(use_enable static-libs static)
+		$(use_with zstd)
+
+		# Disable modules that are in a combined binutils/gdb tree, bug #490566
+		--disable-{gdb,libdecnumber,readline,sim}
+		# Strip out broken static link flags.
+		# https://gcc.gnu.org/PR56750
+		--without-stage1-ldflags
+		# Change SONAME to avoid conflict across
+		# {native,cross}/binutils, binutils-libs. bug #666100
+		--with-extra-soversion-suffix=gentoo-${CATEGORY}-${PN}-$(usex multitarget mt st)
+
+		# Avoid automagic dependency on (currently prefix) systems
+		# systems with debuginfod library, bug #754753
+		--without-debuginfod
+
+		# Avoid automagic dev-libs/msgpack dep, bug #865875
+		--without-msgpack
+
+		# Allow user to opt into CET for host libraries.
+		# Ideally we would like automagic-or-disabled here.
+		# But the check does not quite work on i686: bug #760926.
+		$(use_enable cet)
+
+		# We can enable this by default in future, but it's brand new
+		# in 2.39 with several bugs:
+		# - Doesn't build on musl (https://sourceware.org/bugzilla/show_bug.cgi?id=29477)
+		# - No man pages (https://sourceware.org/bugzilla/show_bug.cgi?id=29521)
+		# - Broken at runtime without Java (https://sourceware.org/bugzilla/show_bug.cgi?id=29479)
+		# - binutils-config (and this ebuild?) needs adaptation first (https://bugs.gentoo.org/865113)
+		$(use_enable gprofng)
+	)
+
+	if ! is_cross ; then
+		myconf+=( $(use_enable pgo pgo-build lto) )
+
+		if use pgo ; then
+			export BUILD_CFLAGS="${CFLAGS}"
+		fi
+	fi
+
+	ECONF_SOURCE="${S}" econf "${myconf[@]}" || die
+
+	# Prevent makeinfo from running if doc is unset.
+	if ! use doc ; then
+		sed -i \
+			-e '/^MAKEINFO/s:=.*:= true:' \
+			Makefile || die
+	fi
+}
+
+src_compile() {
+	cd "${MY_BUILDDIR}" || die
+
+	# see Note [tooldir hack for ldscripts]
+	emake V=1 tooldir="${EPREFIX}${TOOLPATH}" all
+
+	# only build info pages if the user wants them
+	if use doc ; then
+		emake V=1 info
+	fi
+
+	# we nuke the manpages when we're left with junk
+	# (like when we bootstrap, no perl -> no manpages)
+	find . -name '*.1' -a -size 0 -delete
+}
+
+src_test() {
+	cd "${MY_BUILDDIR}" || die
+
+	# bug #637066
+	filter-flags -Wall -Wreturn-type
+
+	emake -k V=1 check
+}
+
+src_install() {
+	local x d
+
+	cd "${MY_BUILDDIR}" || die
+
+	# see Note [tooldir hack for ldscripts]
+	emake V=1 DESTDIR="${D}" tooldir="${EPREFIX}${LIBPATH}" install
+	rm -rf "${ED}"/${LIBPATH}/bin || die
+	use static-libs || find "${ED}" -name '*.la' -delete
+
+	# Newer versions of binutils get fancy with ${LIBPATH}, bug #171905
+	cd "${ED}"/${LIBPATH} || die
+	for d in ../* ; do
+		[[ ${d} == ../${PV} ]] && continue
+		mv ${d}/* . || die
+		rmdir ${d} || die
+	done
+
+	# Now we collect everything intp the proper SLOT-ed dirs
+	# When something is built to cross-compile, it installs into
+	# /usr/$CHOST/ by default ... we have to 'fix' that :)
+	if is_cross ; then
+		cd "${ED}"/${BINPATH} || die
+		for x in * ; do
+			mv ${x} ${x/${CTARGET}-} || die
+		done
+
+		if [[ -d ${ED}/usr/${CHOST}/${CTARGET} ]] ; then
+			mv "${ED}"/usr/${CHOST}/${CTARGET}/include "${ED}"/${INCPATH}
+			mv "${ED}"/usr/${CHOST}/${CTARGET}/lib/* "${ED}"/${LIBPATH}/
+			rm -r "${ED}"/usr/${CHOST}/{include,lib}
+		fi
+	fi
+
+	insinto ${INCPATH}
+	local libiberty_headers=(
+		# Not all the libiberty headers.  See libiberty/Makefile.in:install_to_libdir.
+		demangle.h
+		dyn-string.h
+		fibheap.h
+		hashtab.h
+		libiberty.h
+		objalloc.h
+		splay-tree.h
+	)
+	doins "${libiberty_headers[@]/#/${S}/include/}"
+	if [[ -d ${ED}/${LIBPATH}/lib ]] ; then
+		mv "${ED}"/${LIBPATH}/lib/* "${ED}"/${LIBPATH}/ || die
+		rm -r "${ED}"/${LIBPATH}/lib || die
+	fi
+
+	# Generate an env.d entry for this binutils
+	insinto /etc/env.d/binutils
+	cat <<-EOF > "${T}"/env.d
+		TARGET="${CTARGET}"
+		VER="${PV}"
+		LIBPATH="${EPREFIX}${LIBPATH}"
+	EOF
+	newins "${T}"/env.d ${CTARGET}-${PV}
+
+	# Handle documentation
+	if ! is_cross ; then
+		cd "${S}" || die
+		dodoc README
+
+		docinto bfd
+		dodoc bfd/ChangeLog* bfd/README bfd/PORTING bfd/TODO
+
+		docinto binutils
+		dodoc binutils/ChangeLog binutils/NEWS binutils/README
+
+		docinto gas
+		dodoc gas/ChangeLog* gas/CONTRIBUTORS gas/NEWS gas/README*
+
+		docinto gprof
+		dodoc gprof/ChangeLog* gprof/TEST gprof/TODO gprof/bbconv.pl
+
+		docinto ld
+		dodoc ld/ChangeLog* ld/README ld/NEWS ld/TODO
+
+		docinto libiberty
+		dodoc libiberty/ChangeLog* libiberty/README
+
+		docinto opcodes
+		dodoc opcodes/ChangeLog*
+	fi
+
+	# Remove shared info pages
+	rm -f "${ED}"/${DATAPATH}/info/{dir,configure.info,standards.info}
+
+	# Trim all empty dirs
+	find "${ED}" -depth -type d -exec rmdir {} + 2>/dev/null
+}
+
+pkg_postinst() {
+	# Make sure this ${CTARGET} has a binutils version selected
+	[[ -e ${EROOT}/etc/env.d/binutils/config-${CTARGET} ]] && return 0
+	binutils-config ${CTARGET}-${PV}
+}
+
+pkg_postrm() {
+	local current_profile=$(binutils-config -c ${CTARGET})
+
+	# If no other versions exist, then uninstall for this
+	# target ... otherwise, switch to the newest version
+	# Note: only do this if this version is unmerged.  We
+	#       rerun binutils-config if this is a remerge, as
+	#       we want the mtimes on the symlinks updated (if
+	#       it is the same as the current selected profile)
+	if [[ ! -e ${EPREFIX}${BINPATH}/ld ]] && [[ ${current_profile} == ${CTARGET}-${PV} ]] ; then
+		local choice=$(binutils-config -l | grep ${CTARGET} | awk '{print $2}')
+		choice=${choice//$'\n'/ }
+		choice=${choice/* }
+		if [[ -z ${choice} ]] ; then
+			binutils-config -u ${CTARGET}
+		else
+			binutils-config ${choice}
+		fi
+	elif [[ $(CHOST=${CTARGET} binutils-config -c) == ${CTARGET}-${PV} ]] ; then
+		binutils-config ${CTARGET}-${PV}
+	fi
+}
+
+# Note [slotting support]
+# -----------------------
+# Gentoo's layout for binutils files is non-standard as Gentoo
+# supports slotted installation for binutils. Many tools
+# still expect binutils to reside in known locations.
+# binutils-config package restores symlinks into known locations,
+# like:
+#    /usr/bin/${CTARGET}-<tool>
+#    /usr/bin/${CHOST}/${CTARGET}/lib/ldscrips
+#    /usr/include/
+#
+# Note [tooldir hack for ldscripts]
+# ---------------------------------
+# Build system does not allow ./configure to tweak every location
+# we need for slotting binutils hence all the shuffling in
+# src_install(). This note is about SCRIPTDIR define handling.
+#
+# SCRIPTDIR defines 'ldscripts/' directory location. SCRIPTDIR value
+# is set at build-time in ld/Makefile.am as: 'scriptdir = $(tooldir)/lib'
+# and hardcoded as -DSCRIPTDIR='"$(scriptdir)"' at compile time.
+# Thus we can't just move files around after compilation finished.
+#
+# Our goal is the following:
+# - at build-time set scriptdir to point to symlinked location:
+#   ${TOOLPATH}: /usr/${CHOST} (or /usr/${CHOST}/${CTARGET} for cross-case)
+# - at install-time set scriptdir to point to slotted location:
+#   ${LIBPATH}: /usr/$(get_libdir)/binutils/${CTARGET}/${PV}
diff --git a/sys-devel/binutils/binutils-9999.ebuild b/sys-devel/binutils/binutils-9999.ebuild
index c8e0d5f94944..d8c2553ece20 100644
--- a/sys-devel/binutils/binutils-9999.ebuild
+++ b/sys-devel/binutils/binutils-9999.ebuild
@@ -19,7 +19,7 @@ IUSE="cet doc gold gprofng multitarget +nls pgo +plugins static-libs test vanill
 # PATCH_DEV          - Use download URI https://dev.gentoo.org/~{PATCH_DEV}/distfiles/...
 #                      for the patchsets
 
-PATCH_VER=0
+PATCH_VER=2
 PATCH_DEV=dilfridge
 
 if [[ ${PV} == 9999* ]]; then
@@ -28,11 +28,11 @@ if [[ ${PV} == 9999* ]]; then
 else
 	PATCH_BINUTILS_VER=${PATCH_BINUTILS_VER:-${PV}}
 	PATCH_DEV=${PATCH_DEV:-dilfridge}
-	SRC_URI="mirror://gnu/binutils/binutils-${PV}.tar.xz https://dev.gentoo.org/~${PATCH_DEV}/distfiles/binutils-${PV}.tar.xz"
+	SRC_URI="mirror://gnu/binutils/binutils-${PV}.tar.xz https://sourceware.org/pub/binutils/releases/binutils-${PV}.tar.xz https://dev.gentoo.org/~${PATCH_DEV}/distfiles/binutils-${PV}.tar.xz"
 	[[ -z ${PATCH_VER} ]] || SRC_URI="${SRC_URI}
 		https://dev.gentoo.org/~${PATCH_DEV}/distfiles/binutils-${PATCH_BINUTILS_VER}-patches-${PATCH_VER}.tar.xz"
 	SLOT=$(ver_cut 1-2)
-	#KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
 fi
 
 #
@@ -112,6 +112,10 @@ src_prepare() {
 			einfo "Applying binutils patchset ${patchsetname}"
 			eapply "${WORKDIR}/patch"
 			einfo "Done."
+
+			# This is applied conditionally for now just out of caution.
+			# It should be okay on non-prefix systems though. See bug #892549.
+			use prefix && eapply "${FILESDIR}"/binutils-2.40-linker-search-path.patch
 		fi
 	fi
 
@@ -181,8 +185,6 @@ src_configure() {
 		append-ldflags -Wl,--undefined-version
 	fi
 
-	use elibc_musl && append-ldflags -Wl,-z,stack-size=2097152
-
 	local x
 	echo
 	for x in CATEGORY CBUILD CHOST CTARGET CFLAGS LDFLAGS ; do
diff --git a/sys-devel/binutils/files/binutils-2.40-linker-search-path.patch b/sys-devel/binutils/files/binutils-2.40-linker-search-path.patch
new file mode 100644
index 000000000000..7423f8d70556
--- /dev/null
+++ b/sys-devel/binutils/files/binutils-2.40-linker-search-path.patch
@@ -0,0 +1,74 @@
+https://bugs.gentoo.org/892549
+https://github.com/gentoo/binutils-gdb/pull/4
+
+From 1601840f9f2397edd56177871527a198a14277bd Mon Sep 17 00:00:00 2001
+From: James Le Cuirot <chewi@gentoo.org>
+Date: Sat, 11 Feb 2023 15:15:20 +0000
+Subject: [PATCH 1/2] ldelf.c: Always consider -L arguments when handling
+ DT_NEEDED
+
+This is for consistency with other linkers, including gold. Without
+this, we typically rely on ld.so.conf to find libraries such as
+libstdc++.so.6, while other linkers do not use this file at all.
+--- a/ld/ldelf.c
++++ b/ld/ldelf.c
+@@ -1090,8 +1090,8 @@ ldelf_handle_dt_needed (struct elf_link_hash_table *htab,
+ 	 linker will search.  That means that we want to use
+ 	 rpath_link, rpath, then the environment variable
+ 	 LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH
+-	 entries (native only), then the linker script LIB_SEARCH_DIRS.
+-	 We do not search using the -L arguments.
++	 entries (native only), then the linker script LIB_SEARCH_DIRS,
++	 then the -L arguments.
+ 
+ 	 We search twice.  The first time, we skip objects which may
+ 	 introduce version mismatches.  The second time, we force
+@@ -1165,11 +1165,7 @@ ldelf_handle_dt_needed (struct elf_link_hash_table *htab,
+ 	  len = strlen (l->name);
+ 	  for (search = search_head; search != NULL; search = search->next)
+ 	    {
+-	      char *filename;
+-
+-	      if (search->cmdline)
+-		continue;
+-	      filename = (char *) xmalloc (strlen (search->name) + len + 2);
++	      char *filename = (char *) xmalloc (strlen (search->name) + len + 2);
+ 	      sprintf (filename, "%s/%s", search->name, l->name);
+ 	      nn.name = filename;
+ 	      if (ldelf_try_needed (&nn, force, is_linux))
+
+From 8afc65c8d8c0fff2f686ddd8eb9023c7ebabcca9 Mon Sep 17 00:00:00 2001
+From: James Le Cuirot <chewi@gentoo.org>
+Date: Sat, 11 Feb 2023 15:18:58 +0000
+Subject: [PATCH 2/2] ldelf.c: Do not search for libraries using ld.so.conf
+
+Other linkers do not do this. It is problematic for Gentoo Linux,
+because crossdev installs libraries such as libstdc++.so.6 outside of
+the sysroot.
+--- a/ld/ld.texi
++++ b/ld/ld.texi
+@@ -2355,7 +2355,9 @@ For a linker for a Linux system, if the file @file{/etc/ld.so.conf}
+ exists, the list of directories found in that file.  Note: the path
+ to this file is prefixed with the @code{sysroot} value, if that is
+ defined, and then any @code{prefix} string if the linker was
+-configured with the @command{--prefix=<path>} option.
++configured with the @command{--prefix=<path>} option. This has feature has
++been disabled on Gentoo Linux to make it consistent with the other
++linkers, which do not do this.
+ @item
+ For a native linker on a FreeBSD system, any directories specified by
+ the @code{_PATH_ELF_HINTS} macro defined in the @file{elf-hints.h}
+--- a/ld/ldelf.c
++++ b/ld/ldelf.c
+@@ -1156,10 +1156,6 @@ ldelf_handle_dt_needed (struct elf_link_hash_table *htab,
+ 	      if (is_freebsd
+ 		  && ldelf_check_ld_elf_hints (l, force, elfsize))
+ 		break;
+-
+-	      if (is_linux
+-		  && ldelf_check_ld_so_conf (l, force, elfsize, prefix))
+-		break;
+ 	    }
+ 
+ 	  len = strlen (l->name);
+