linamh/sys-libs/glibc/files/eblits/common.eblit

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# Copyright 1999-2007 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 1.9 2009/01/28 18:11:41 vapier Exp $
# 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() {
if [[ -z ${ALT_HEADERS} ]] ; then
if is_crosscompile ; then
ALT_HEADERS="/usr/${CTARGET}/usr/include"
else
ALT_HEADERS="/usr/include"
fi
fi
echo "${ALT_HEADERS}"
}
alt_build_headers() {
if [[ -z ${ALT_BUILD_HEADERS} ]] ; then
ALT_BUILD_HEADERS=$(alt_headers)
if tc-is-cross-compiler ; then
ALT_BUILD_HEADERS=${ROOT}$(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 "${ALT_BUILD_HEADERS}"
}
alt_usrlibdir() {
if is_crosscompile ; then
echo /usr/${CTARGET}/usr/$(get_libdir)
else
echo /usr/$(get_libdir)
fi
}
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=*
unset CBUILD_OPT CTARGET_OPT
if has_multilib_profile ; then
CTARGET_OPT=$(get_abi_CTARGET)
[[ -z ${CTARGET_OPT} ]] && CTARGET_OPT=$(get_abi_CHOST)
fi
case $(tc-arch) in
x86)
# -march needed for #185404
local t=${CTARGET_OPT:-${CTARGET}}
t=${t%%-*}
if ! echo "" | $(tc-getCC) ${CFLAGS} -E -dD - | grep -qs __${t}__ ; then
filter-flags '-march=*'
export CFLAGS="-march=${t} ${CFLAGS}"
fi
;;
amd64)
# Punt this when amd64's 2004.3 is removed
CFLAGS_x86="-m32"
# -march needed for #185404
local t=${CTARGET_OPT:-${CTARGET}}
t=${t%%-*}
if ! echo "" | $(tc-getCC) ${CFLAGS} ${CFLAGS_x86} -m32 -E -dD - | grep -qs __${t}__ ; then
filter-flags '-march=*'
export CFLAGS_x86="${CFLAGS_x86} -march=${t}"
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} in
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
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
# Cant build glibc itself with fortify code
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
filter-flags -fstack-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
# Only list the arches that cannot do NPTL
case $(tc-arch) in
m68k) return 1;;
sparc)
# >= v9 is needed for nptl.
[[ ${PROFILE_ARCH} == "sparc" ]] && return 1
;;
esac
return 0
}
want_linuxthreads() {
[[ -z ${LT_VER} ]] && return 1
! use nptlonly && return 0
want_nptl || return 0
return 1
}
want_tls() {
# Archs that can use TLS (Thread Local Storage)
case $(tc-arch) in
sparc)
# 2.3.6 should have tls support on sparc64
# when using newer binutils
case ${CTARGET/-*} in
sparc64*) return 1 ;;
*) return 0 ;;
esac
;;
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 ${WANT__THREAD}
echo 'extern __thread int i;' > "${T}"/test-__thread.c
$(tc-getCC ${CTARGET}) -c "${T}"/test-__thread.c -o "${T}"/test-__thread.o &> /dev/null
WANT__THREAD=$?
rm -f "${T}"/test-__thread.[co]
return ${WANT__THREAD}
}
use_multilib() {
case ${CTARGET} in
sparc*|mips64*|x86_64*|powerpc64*|s390x*)
has_multilib_profile || use multilib ;;
*) false ;;
esac
}
# Setup toolchain variables that would be defined in the profiles for these archs.
setup_env() {
# silly users
unset LD_RUN_PATH
if is_crosscompile || tc-is-cross-compiler ; then
multilib_env ${CTARGET}
if ! use multilib ; then
MULTILIB_ABIS=${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:-${DEFAULT_ABI:-default}}
if is_crosscompile || tc-is-cross-compiler ; then
local VAR=CFLAGS_${ABI}
# We need to export CFLAGS with abi information in them because
# glibc's configure script checks CFLAGS for some targets (like mips)
export CFLAGS="${!VAR} ${CFLAGS}"
fi
}
just_headers() {
is_crosscompile && use crosscompile_opts_headers-only
}