diff options
Diffstat (limited to 'sys-libs/glibc/files/eblits/common.eblit')
| -rw-r--r-- | sys-libs/glibc/files/eblits/common.eblit | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/sys-libs/glibc/files/eblits/common.eblit b/sys-libs/glibc/files/eblits/common.eblit new file mode 100644 index 0000000..2f7471e --- /dev/null +++ b/sys-libs/glibc/files/eblits/common.eblit @@ -0,0 +1,343 @@ +# Copyright 1999-2014 Gentoo Foundation +# Distributed under the terms of the GNU General Public License v2 +# $Header: /var/cvsroot/gentoo-x86/sys-libs/glibc/files/eblits/common.eblit,v 1.45 2014/10/18 23:09:51 vapier Exp $ + +alt_prefix() { + is_crosscompile && echo /usr/${CTARGET} +} + +if [[ ${EAPI:-0} == [012] ]] ; then + : ${ED:=${D}} + : ${EROOT:=${ROOT}} +fi +# This indirection is for binpkgs. #523332 +_nonfatal() { nonfatal "$@" ; } +if [[ ${EAPI:-0} == [0123] ]] ; then + nonfatal() { "$@" ; } + _nonfatal() { "$@" ; } +fi + +# We need to be able to set alternative headers for +# compiling for non-native platform +# Will also become useful for testing kernel-headers without screwing up +# the whole system. +# note: intentionally undocumented. +alt_headers() { + echo ${ALT_HEADERS:=$(alt_prefix)/usr/include} +} +alt_build_headers() { + if [[ -z ${ALT_BUILD_HEADERS} ]] ; then + ALT_BUILD_HEADERS=$(alt_headers) + if tc-is-cross-compiler ; then + ALT_BUILD_HEADERS=${SYSROOT}$(alt_headers) + if [[ ! -e ${ALT_BUILD_HEADERS}/linux/version.h ]] ; then + local header_path=$(echo '#include <linux/version.h>' | $(tc-getCPP ${CTARGET}) ${CFLAGS} 2>&1 | grep -o '[^"]*linux/version.h') + ALT_BUILD_HEADERS=${header_path%/linux/version.h} + fi + fi + fi + echo "${ALT_BUILD_HEADERS}" +} + +alt_libdir() { + echo $(alt_prefix)/$(get_libdir) +} +alt_usrlibdir() { + echo $(alt_prefix)/usr/$(get_libdir) +} + +builddir() { + echo "${WORKDIR}/build-${ABI}-${CTARGET}-$1" +} + +setup_target_flags() { + # This largely mucks with compiler flags. None of which should matter + # when building up just the headers. + just_headers && return 0 + + case $(tc-arch) in + x86) + # -march needed for #185404 #199334 + if ! glibc_compile_test "" 'void f(int i, void *p) {if (__sync_fetch_and_add(&i, 1)) f(i, p);}\nint main(){return 0;}\n' 2>/dev/null ; then + local t=${CTARGET_OPT:-${CTARGET}} + t=${t%%-*} + filter-flags '-march=*' + export CFLAGS="-march=${t} ${CFLAGS}" + einfo "Auto adding -march=${t} to CFLAGS #185404" + fi + ;; + amd64) + # -march needed for #185404 #199334 + if ! glibc_compile_test "${CFLAGS_x86}" 'void f(int i, void *p) {if (__sync_fetch_and_add(&i, 1)) f(i, p);}\nint main(){return 0;}\n' 2>/dev/null ; then + local t=${CTARGET_OPT:-${CTARGET}} + t=${t%%-*} + filter-flags '-march=*' + # ugly, ugly, ugly. ugly. + CFLAGS_x86=$(CFLAGS=${CFLAGS_x86} filter-flags '-march=*'; echo "${CFLAGS}") + export CFLAGS_x86="${CFLAGS_x86} -march=${t}" + einfo "Auto adding -march=${t} to CFLAGS_x86 #185404" + fi + ;; + ppc) + append-flags "-freorder-blocks" + ;; + sparc) + # Both sparc and sparc64 can use -fcall-used-g6. -g7 is bad, though. + filter-flags "-fcall-used-g7" + append-flags "-fcall-used-g6" + filter-flags "-mvis" + + GLIBCMAJOR=$(get_version_component_range 1 ${PV}) + GLIBCMINOR=$(get_version_component_range 2 ${PV}) + + # set CTARGET_OPT so glibc can use cpu-specific .S files for better performance + # - UltraSPARC T1 (niagara) support requires >= glibc 2.8 + # - UltraSPARC T2 (niagara2) support requires >= glibc 2.7 + + if is_crosscompile || [[ ${PROFILE_ARCH} == "sparc64" ]] || { has_multilib_profile && ! tc-is-cross-compiler; } ; then + case ${ABI}:${CTARGET} in + sparc64:*|\ + default:sparc64*) + filter-flags -Wa,-xarch -Wa,-A + + if is-flagq "-mcpu=niagara2" && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.7 ]] ; then + CTARGET_OPT="sparc64v2-unknown-linux-gnu" + append-flags "-Wa,-xarch=v9b" + export ASFLAGS="${ASFLAGS} -Wa,-xarch=v9b" + elif { is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2" ; } && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.6 ]] ; then + CTARGET_OPT="sparc64v-unknown-linux-gnu" + append-flags "-Wa,-xarch=v9b" + export ASFLAGS="${ASFLAGS} -Wa,-xarch=v9b" + elif is-flagq "-mcpu=ultrasparc3" || is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2"; then + CTARGET_OPT="sparc64b-unknown-linux-gnu" + append-flags "-Wa,-xarch=v9b" + export ASFLAGS="${ASFLAGS} -Wa,-xarch=v9b" + else + CTARGET_OPT="sparc64-unknown-linux-gnu" + append-flags "-Wa,-xarch=v9a" + export ASFLAGS="${ASFLAGS} -Wa,-xarch=v9a" + fi + ;; + *) + if is-flagq "-mcpu=niagara2" && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.7 ]] ; then + CTARGET_OPT="sparcv9v2-unknown-linux-gnu" + elif { is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2" ; } && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.6 ]] ; then + CTARGET_OPT="sparcv9v-unknown-linux-gnu" + elif is-flagq "-mcpu=ultrasparc3" || is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2"; then + CTARGET_OPT="sparcv9b-unknown-linux-gnu" + else + CTARGET_OPT="sparcv9-unknown-linux-gnu" + fi + ;; + esac + else + if is-flagq "-mcpu=niagara2" && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.7 ]] ; then + CTARGET_OPT="sparcv9v2-unknown-linux-gnu" + elif { is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2" ; } && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.6 ]] ; then + CTARGET_OPT="sparcv9v-unknown-linux-gnu" + elif is-flagq "-mcpu=ultrasparc3" || is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2"; then + CTARGET_OPT="sparcv9b-unknown-linux-gnu" + elif { is_crosscompile && want_nptl; } || is-flagq "-mcpu=ultrasparc2" || is-flagq "-mcpu=ultrasparc"; then + CTARGET_OPT="sparcv9-unknown-linux-gnu" + fi + fi + ;; + esac +} + +setup_flags() { + # Make sure host make.conf doesn't pollute us + if is_crosscompile || tc-is-cross-compiler ; then + CHOST=${CTARGET} strip-unsupported-flags + fi + + # Store our CFLAGS because it's changed depending on which CTARGET + # we are building when pulling glibc on a multilib profile + CFLAGS_BASE=${CFLAGS_BASE-${CFLAGS}} + CFLAGS=${CFLAGS_BASE} + CXXFLAGS_BASE=${CXXFLAGS_BASE-${CXXFLAGS}} + CXXFLAGS=${CXXFLAGS_BASE} + ASFLAGS_BASE=${ASFLAGS_BASE-${ASFLAGS}} + ASFLAGS=${ASFLAGS_BASE} + + # Over-zealous CFLAGS can often cause problems. What may work for one + # person may not work for another. To avoid a large influx of bugs + # relating to failed builds, we strip most CFLAGS out to ensure as few + # problems as possible. + strip-flags + strip-unsupported-flags + filter-flags -m32 -m64 -mabi=* + + # Bug 492892. + filter-flags -frecord-gcc-switches + + unset CBUILD_OPT CTARGET_OPT + if use multilib ; then + CTARGET_OPT=$(get_abi_CTARGET) + [[ -z ${CTARGET_OPT} ]] && CTARGET_OPT=$(get_abi_CHOST) + fi + + setup_target_flags + + if [[ -n ${CTARGET_OPT} && ${CBUILD} == ${CHOST} ]] && ! is_crosscompile; then + CBUILD_OPT=${CTARGET_OPT} + fi + + # Lock glibc at -O2 -- linuxthreads needs it and we want to be + # conservative here. -fno-strict-aliasing is to work around #155906 + filter-flags -O? + append-flags -O2 -fno-strict-aliasing + + # Can't build glibc itself with fortify code. Newer versions add + # this flag for us, so no need to do it manually. + version_is_at_least 2.16 ${PV} || append-cppflags -U_FORTIFY_SOURCE + + # building glibc with SSP is fraught with difficulty, especially + # due to __stack_chk_fail_local which would mean significant changes + # to the glibc build process. See bug #94325 #293721 + # Note we have to handle both user-given CFLAGS and gcc defaults via + # spec rules here. We can't simply add -fno-stack-protector as it gets + # added before user flags, and we can't just filter-flags because + # _filter_hardened doesn't support globs. + filter-flags -fstack-protector* + gcc-specs-ssp && append-flags $(test-flags -fno-stack-protector) + + if use hardened && gcc-specs-pie ; then + # Force PIC macro definition for all compilations since they're all + # either -fPIC or -fPIE with the default-PIE compiler. + append-cppflags -DPIC + else + # Don't build -fPIE without the default-PIE compiler and the + # hardened-pie patch + filter-flags -fPIE + fi +} + +want_nptl() { + [[ -z ${LT_VER} ]] && return 0 + want_tls || return 1 + use nptl || return 1 + + # Older versions of glibc had incomplete arch support for nptl. + # But if you're building those now, you can handle USE=nptl yourself. + return 0 +} + +want_linuxthreads() { + [[ -z ${LT_VER} ]] && return 1 + use linuxthreads +} + +want_tls() { + # Archs that can use TLS (Thread Local Storage) + case $(tc-arch) in + x86) + # requires i486 or better #106556 + [[ ${CTARGET} == i[4567]86* ]] && return 0 + return 1 + ;; + esac + + return 0 +} + +want__thread() { + want_tls || return 1 + + # For some reason --with-tls --with__thread is causing segfaults on sparc32. + [[ ${PROFILE_ARCH} == "sparc" ]] && return 1 + + [[ -n ${WANT__THREAD} ]] && return ${WANT__THREAD} + + # only test gcc -- cant test linking yet + tc-has-tls -c ${CTARGET} + WANT__THREAD=$? + + return ${WANT__THREAD} +} + +use_multiarch() { + # Make sure binutils is new enough to support indirect functions #336792 + # This funky sed supports gold and bfd linkers. + local bver nver + bver=$($(tc-getLD ${CTARGET}) -v | sed -n -r '1{s:[^0-9]*::;s:^([0-9.]*).*:\1:;p}') + case $(tc-arch ${CTARGET}) in + amd64|x86) nver="2.20" ;; + arm) nver="2.22" ;; + hppa) nver="2.23" ;; + ppc|ppc64) nver="2.20" ;; + # ifunc was added in 2.23, but glibc also needs machinemode which is in 2.24. + s390) nver="2.24" ;; + sparc) nver="2.21" ;; + *) return 1 ;; + esac + version_is_at_least ${nver} ${bver} +} + +# Setup toolchain variables that had historically +# been defined in the profiles for these archs. +setup_env() { + # silly users + unset LD_RUN_PATH + unset LD_ASSUME_KERNEL + + multilib_env ${CTARGET_OPT:-${CTARGET}} + if is_crosscompile || tc-is-cross-compiler ; then + if ! use multilib ; then + MULTILIB_ABIS=${DEFAULT_ABI} + else + MULTILIB_ABIS=${MULTILIB_ABIS:-${DEFAULT_ABI}} + fi + + # If the user has CFLAGS_<CTARGET> in their make.conf, use that, + # and fall back on CFLAGS. + local VAR=CFLAGS_${CTARGET//[-.]/_} + CFLAGS=${!VAR-${CFLAGS}} + fi + + setup_flags + + export ABI=${ABI:-${DEFAULT_ABI:-default}} + + local VAR=CFLAGS_${ABI} + # We need to export CFLAGS with abi information in them because glibc's + # configure script checks CFLAGS for some targets (like mips). Keep + # around the original clean value to avoid appending multiple ABIs on + # top of each other. + : ${__GLIBC_CC:=$(tc-getCC ${CTARGET_OPT:-${CTARGET}})} + export __GLIBC_CC CC="${__GLIBC_CC} ${!VAR}" +} + +foreach_abi() { + setup_env + + local ret=0 + local abilist="" + if use multilib ; then + abilist=$(get_install_abis) + else + abilist=${DEFAULT_ABI} + fi + evar_push ABI + export ABI + for ABI in ${abilist:-default} ; do + setup_env + einfo "Running $1 for ABI ${ABI}" + $1 + : $(( ret |= $? )) + done + evar_pop + return ${ret} +} + +just_headers() { + is_crosscompile && use crosscompile_opts_headers-only +} + +glibc_banner() { + local b="Gentoo ${PVR}" + [[ -n ${SNAP_VER} ]] && b+=" snapshot ${SNAP_VER}" + [[ -n ${BRANCH_UPDATE} ]] && b+=" branch ${BRANCH_UPDATE}" + [[ -n ${PATCH_VER} ]] && ! use vanilla && b+=" p${PATCH_VER}" + echo "${b}" +} |