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eclass/usr-ldscript: Sync with Gentoo
It's from Gentoo commit a7361d2e880798bce305c5085c2f63b5d2c747a6.
This commit is contained in:
Krzesimir Nowak
parent
9f85085dcf
commit
85943f4d59
@ -1 +1,172 @@
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# Empty file
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# Copyright 2019-2023 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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# @ECLASS: usr-ldscript.eclass
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# @MAINTAINER:
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# Toolchain Ninjas <toolchain@gentoo.org>
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# @SUPPORTED_EAPIS: 7 8
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# @BLURB: Defines the gen_usr_ldscript function.
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case ${EAPI} in
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7|8) ;;
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*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
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esac
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if [[ -z ${_USR_LDSCRIPT_ECLASS} ]]; then
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_USR_LDSCRIPT_ECLASS=1
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inherit multilib toolchain-funcs
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IUSE="split-usr"
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# @FUNCTION: gen_usr_ldscript
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# @USAGE: [-a] <list of libs to create linker scripts for>
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# @DESCRIPTION:
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# This function generate linker scripts in /usr/lib for dynamic
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# libs in /lib. This is to fix linking problems when you have
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# the .so in /lib, and the .a in /usr/lib. What happens is that
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# in some cases when linking dynamic, the .a in /usr/lib is used
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# instead of the .so in /lib due to gcc/libtool tweaking ld's
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# library search path. This causes many builds to fail.
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# See bug #4411 for more info.
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#
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# Note that you should in general use the unversioned name of
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# the library (libfoo.so), as ldconfig should usually update it
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# correctly to point to the latest version of the library present.
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gen_usr_ldscript() {
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local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
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tc-is-static-only && return
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use prefix && return
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# The toolchain's sysroot is automatically prepended to paths in this
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# script. We therefore need to omit EPREFIX on standalone prefix (RAP)
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# systems. prefix-guest (non-RAP) systems don't apply a sysroot so EPREFIX
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# is still needed in that case. This is moot because the above line makes
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# the function a noop on prefix, but we keep this in case that changes.
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local prefix=$(usex prefix-guest "${EPREFIX}" "")
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# We only care about stuffing / for the native ABI. #479448
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if [[ $(type -t multilib_is_native_abi) == "function" ]] ; then
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multilib_is_native_abi || return 0
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fi
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# Eventually we'd like to get rid of this func completely #417451
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case ${CTARGET:-${CHOST}} in
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*-darwin*) ;;
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*-android*) return 0 ;;
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*linux*)
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use split-usr || return 0
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;;
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*) return 0 ;;
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esac
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# Just make sure it exists
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dodir /usr/${libdir}
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if [[ $1 == "-a" ]] ; then
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auto=true
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shift
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dodir /${libdir}
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fi
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# OUTPUT_FORMAT gives hints to the linker as to what binary format
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# is referenced ... makes multilib saner
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local flags=( ${CFLAGS} ${LDFLAGS} -Wl,--verbose )
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if $(tc-getLD) --version | grep -q 'GNU gold' ; then
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# If they're using gold, manually invoke the old bfd. #487696
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local d="${T}/bfd-linker"
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mkdir -p "${d}"
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ln -sf $(type -P ${CHOST}-ld.bfd) "${d}"/ld
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flags+=( -B"${d}" )
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fi
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output_format=$($(tc-getCC) "${flags[@]}" 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
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[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
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for lib in "$@" ; do
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local tlib
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if ${auto} ; then
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lib="lib${lib}${suffix}"
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else
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# Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
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# This especially is for AIX where $(get_libname) can return ".a",
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# so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
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[[ -r ${ED}/${libdir}/${lib} ]] || continue
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#TODO: better die here?
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fi
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case ${CTARGET:-${CHOST}} in
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*-darwin*)
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if ${auto} ; then
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tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
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else
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tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
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fi
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[[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
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tlib=${tlib##*/}
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if ${auto} ; then
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mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
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# some install_names are funky: they encode a version
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if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
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mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
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fi
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rm -f "${ED}"/${libdir}/${lib}
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fi
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# Mach-O files have an id, which is like a soname, it tells how
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# another object linking against this lib should reference it.
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# Since we moved the lib from usr/lib into lib this reference is
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# wrong. Hence, we update it here. We don't configure with
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# libdir=/lib because that messes up libtool files.
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# Make sure we don't lose the specific version, so just modify the
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# existing install_name
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if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
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chmod u+w "${ED}/${libdir}/${tlib}" || die # needed to write to it
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local nowrite=yes
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fi
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install_name_tool \
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-id "${EPREFIX}"/${libdir}/${tlib} \
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"${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
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if [[ -n ${nowrite} ]] ; then
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chmod u-w "${ED}/${libdir}/${tlib}" || die
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fi
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# Now as we don't use GNU binutils and our linker doesn't
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# understand linker scripts, just create a symlink.
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pushd "${ED}/usr/${libdir}" > /dev/null
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ln -snf "../../${libdir}/${tlib}" "${lib}"
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popd > /dev/null
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;;
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*)
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if ${auto} ; then
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tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
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[[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
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mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
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# some SONAMEs are funky: they encode a version before the .so
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if [[ ${tlib} != ${lib}* ]] ; then
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mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
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fi
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rm -f "${ED}"/${libdir}/${lib}
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else
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tlib=${lib}
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fi
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cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
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/* GNU ld script
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Since Gentoo has critical dynamic libraries in /lib, and the static versions
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in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
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run into linking problems. This "fake" dynamic lib is a linker script that
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redirects the linker to the real lib. And yes, this works in the cross-
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compiling scenario as the sysroot-ed linker will prepend the real path.
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See bug https://bugs.gentoo.org/4411 for more info.
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*/
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${output_format}
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GROUP ( ${prefix}/${libdir}/${tlib} )
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END_LDSCRIPT
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;;
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esac
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fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
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done
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}
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fi # _USR_LDSCRIPT_ECLASS
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