289 lines
8.5 KiB
Plaintext
289 lines
8.5 KiB
Plaintext
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# Copyright 1999-2007 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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# $Header: /var/cvsroot/gentoo-x86/sys-libs/glibc/files/eblits/common.eblit,v 1.9 2009/01/28 18:11:41 vapier Exp $
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# We need to be able to set alternative headers for
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# compiling for non-native platform
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# Will also become useful for testing kernel-headers without screwing up
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# the whole system.
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# note: intentionally undocumented.
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alt_headers() {
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if [[ -z ${ALT_HEADERS} ]] ; then
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if is_crosscompile ; then
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ALT_HEADERS="/usr/${CTARGET}/usr/include"
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else
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ALT_HEADERS="/usr/include"
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fi
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fi
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echo "${ALT_HEADERS}"
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}
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alt_build_headers() {
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if [[ -z ${ALT_BUILD_HEADERS} ]] ; then
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ALT_BUILD_HEADERS=$(alt_headers)
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if tc-is-cross-compiler ; then
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ALT_BUILD_HEADERS=${ROOT}$(alt_headers)
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if [[ ! -e ${ALT_BUILD_HEADERS}/linux/version.h ]] ; then
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local header_path=$(echo '#include <linux/version.h>' | $(tc-getCPP ${CTARGET}) ${CFLAGS} 2>&1 | grep -o '[^"]*linux/version.h')
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ALT_BUILD_HEADERS=${header_path%/linux/version.h}
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fi
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fi
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fi
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echo "${ALT_BUILD_HEADERS}"
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}
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alt_usrlibdir() {
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if is_crosscompile ; then
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echo /usr/${CTARGET}/usr/$(get_libdir)
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else
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echo /usr/$(get_libdir)
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fi
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}
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setup_flags() {
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# Make sure host make.conf doesn't pollute us
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if is_crosscompile || tc-is-cross-compiler ; then
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CHOST=${CTARGET} strip-unsupported-flags
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fi
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# Store our CFLAGS because it's changed depending on which CTARGET
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# we are building when pulling glibc on a multilib profile
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CFLAGS_BASE=${CFLAGS_BASE-${CFLAGS}}
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CFLAGS=${CFLAGS_BASE}
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CXXFLAGS_BASE=${CXXFLAGS_BASE-${CXXFLAGS}}
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CXXFLAGS=${CXXFLAGS_BASE}
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ASFLAGS_BASE=${ASFLAGS_BASE-${ASFLAGS}}
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ASFLAGS=${ASFLAGS_BASE}
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# Over-zealous CFLAGS can often cause problems. What may work for one
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# person may not work for another. To avoid a large influx of bugs
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# relating to failed builds, we strip most CFLAGS out to ensure as few
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# problems as possible.
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strip-flags
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strip-unsupported-flags
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filter-flags -m32 -m64 -mabi=*
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unset CBUILD_OPT CTARGET_OPT
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if has_multilib_profile ; then
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CTARGET_OPT=$(get_abi_CTARGET)
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[[ -z ${CTARGET_OPT} ]] && CTARGET_OPT=$(get_abi_CHOST)
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fi
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case $(tc-arch) in
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x86)
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# -march needed for #185404
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local t=${CTARGET_OPT:-${CTARGET}}
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t=${t%%-*}
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if ! echo "" | $(tc-getCC) ${CFLAGS} -E -dD - | grep -qs __${t}__ ; then
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filter-flags '-march=*'
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export CFLAGS="-march=${t} ${CFLAGS}"
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fi
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;;
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amd64)
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# Punt this when amd64's 2004.3 is removed
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CFLAGS_x86="-m32"
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# -march needed for #185404
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local t=${CTARGET_OPT:-${CTARGET}}
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t=${t%%-*}
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if ! echo "" | $(tc-getCC) ${CFLAGS} ${CFLAGS_x86} -m32 -E -dD - | grep -qs __${t}__ ; then
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filter-flags '-march=*'
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export CFLAGS_x86="${CFLAGS_x86} -march=${t}"
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fi
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;;
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ppc)
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append-flags "-freorder-blocks"
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;;
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sparc)
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# Both sparc and sparc64 can use -fcall-used-g6. -g7 is bad, though.
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filter-flags "-fcall-used-g7"
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append-flags "-fcall-used-g6"
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filter-flags "-mvis"
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GLIBCMAJOR=$(get_version_component_range 1 ${PV})
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GLIBCMINOR=$(get_version_component_range 2 ${PV})
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# set CTARGET_OPT so glibc can use cpu-specific .S files for better performance
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# - UltraSPARC T1 (niagara) support requires >= glibc 2.8
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# - UltraSPARC T2 (niagara2) support requires >= glibc 2.7
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if is_crosscompile || [[ ${PROFILE_ARCH} == "sparc64" ]] || { has_multilib_profile && ! tc-is-cross-compiler; } ; then
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case ${ABI} in
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sparc64)
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filter-flags -Wa,-xarch -Wa,-A
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if is-flagq "-mcpu=niagara2" && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.7 ]] ; then
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CTARGET_OPT="sparc64v2-unknown-linux-gnu"
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append-flags "-Wa,-xarch=v9b"
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export ASFLAGS="${ASFLAGS} -Wa,-xarch=v9b"
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elif { is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2" ; } && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.6 ]] ; then
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CTARGET_OPT="sparc64v-unknown-linux-gnu"
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append-flags "-Wa,-xarch=v9b"
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export ASFLAGS="${ASFLAGS} -Wa,-xarch=v9b"
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elif is-flagq "-mcpu=ultrasparc3" || is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2"; then
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CTARGET_OPT="sparc64b-unknown-linux-gnu"
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append-flags "-Wa,-xarch=v9b"
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export ASFLAGS="${ASFLAGS} -Wa,-xarch=v9b"
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else
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CTARGET_OPT="sparc64-unknown-linux-gnu"
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append-flags "-Wa,-xarch=v9a"
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export ASFLAGS="${ASFLAGS} -Wa,-xarch=v9a"
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fi
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;;
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*)
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if is-flagq "-mcpu=niagara2" && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.7 ]] ; then
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CTARGET_OPT="sparcv9v2-unknown-linux-gnu"
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elif { is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2" ; } && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.6 ]] ; then
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CTARGET_OPT="sparcv9v-unknown-linux-gnu"
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elif is-flagq "-mcpu=ultrasparc3" || is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2"; then
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CTARGET_OPT="sparcv9b-unknown-linux-gnu"
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else
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CTARGET_OPT="sparcv9-unknown-linux-gnu"
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fi
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;;
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esac
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else
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if is-flagq "-mcpu=niagara2" && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.7 ]] ; then
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CTARGET_OPT="sparcv9v2-unknown-linux-gnu"
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elif { is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2" ; } && [[ ${GLIBCMAJOR}.${GLIBCMINOR} > 2.6 ]] ; then
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CTARGET_OPT="sparcv9v-unknown-linux-gnu"
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elif is-flagq "-mcpu=ultrasparc3" || is-flagq "-mcpu=niagara" || is-flagq "-mcpu=niagara2"; then
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CTARGET_OPT="sparcv9b-unknown-linux-gnu"
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elif { is_crosscompile && want_nptl; } || is-flagq "-mcpu=ultrasparc2" || is-flagq "-mcpu=ultrasparc"; then
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CTARGET_OPT="sparcv9-unknown-linux-gnu"
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fi
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fi
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;;
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esac
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if [[ -n ${CTARGET_OPT} && ${CBUILD} == ${CHOST} ]] && ! is_crosscompile; then
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CBUILD_OPT=${CTARGET_OPT}
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fi
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# Lock glibc at -O2 -- linuxthreads needs it and we want to be
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# conservative here. -fno-strict-aliasing is to work around #155906
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filter-flags -O?
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append-flags -O2 -fno-strict-aliasing
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# Cant build glibc itself with fortify code
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append-cppflags -U_FORTIFY_SOURCE
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# building glibc with SSP is fraught with difficulty, especially
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# due to __stack_chk_fail_local which would mean significant changes
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# to the glibc build process. See bug #94325
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filter-flags -fstack-protector
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if use hardened && gcc-specs-pie ; then
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# Force PIC macro definition for all compilations since they're all
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# either -fPIC or -fPIE with the default-PIE compiler.
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append-cppflags -DPIC
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else
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# Don't build -fPIE without the default-PIE compiler and the
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# hardened-pie patch
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filter-flags -fPIE
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fi
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}
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want_nptl() {
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[[ -z ${LT_VER} ]] && return 0
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want_tls || return 1
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use nptl || return 1
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# Only list the arches that cannot do NPTL
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case $(tc-arch) in
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m68k) return 1;;
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sparc)
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# >= v9 is needed for nptl.
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[[ ${PROFILE_ARCH} == "sparc" ]] && return 1
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;;
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esac
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return 0
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}
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want_linuxthreads() {
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[[ -z ${LT_VER} ]] && return 1
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! use nptlonly && return 0
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want_nptl || return 0
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return 1
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}
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want_tls() {
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# Archs that can use TLS (Thread Local Storage)
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case $(tc-arch) in
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sparc)
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# 2.3.6 should have tls support on sparc64
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# when using newer binutils
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case ${CTARGET/-*} in
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sparc64*) return 1 ;;
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*) return 0 ;;
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esac
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;;
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x86)
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# requires i486 or better #106556
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[[ ${CTARGET} == i[4567]86* ]] && return 0
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return 1
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;;
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esac
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return 0
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}
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want__thread() {
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want_tls || return 1
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# For some reason --with-tls --with__thread is causing segfaults on sparc32.
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[[ ${PROFILE_ARCH} == "sparc" ]] && return 1
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[[ -n ${WANT__THREAD} ]] && return ${WANT__THREAD}
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echo 'extern __thread int i;' > "${T}"/test-__thread.c
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$(tc-getCC ${CTARGET}) -c "${T}"/test-__thread.c -o "${T}"/test-__thread.o &> /dev/null
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WANT__THREAD=$?
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rm -f "${T}"/test-__thread.[co]
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return ${WANT__THREAD}
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}
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use_multilib() {
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case ${CTARGET} in
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sparc*|mips64*|x86_64*|powerpc64*|s390x*)
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has_multilib_profile || use multilib ;;
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*) false ;;
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esac
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}
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# Setup toolchain variables that would be defined in the profiles for these archs.
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setup_env() {
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# silly users
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unset LD_RUN_PATH
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if is_crosscompile || tc-is-cross-compiler ; then
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multilib_env ${CTARGET}
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if ! use multilib ; then
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MULTILIB_ABIS=${DEFAULT_ABI}
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else
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MULTILIB_ABIS=${MULTILIB_ABIS:-${DEFAULT_ABI}}
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fi
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# If the user has CFLAGS_<CTARGET> in their make.conf, use that,
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# and fall back on CFLAGS.
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local VAR=CFLAGS_${CTARGET//[-.]/_}
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CFLAGS=${!VAR-${CFLAGS}}
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fi
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setup_flags
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export ABI=${ABI:-${DEFAULT_ABI:-default}}
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if is_crosscompile || tc-is-cross-compiler ; then
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local VAR=CFLAGS_${ABI}
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# We need to export CFLAGS with abi information in them because
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# glibc's configure script checks CFLAGS for some targets (like mips)
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export CFLAGS="${!VAR} ${CFLAGS}"
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fi
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}
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just_headers() {
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is_crosscompile && use crosscompile_opts_headers-only
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}
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