diff options
Diffstat (limited to 'eclass/flag-o-matic.eclass')
| -rw-r--r-- | eclass/flag-o-matic.eclass | 780 |
1 files changed, 780 insertions, 0 deletions
diff --git a/eclass/flag-o-matic.eclass b/eclass/flag-o-matic.eclass new file mode 100644 index 0000000..60223b8 --- /dev/null +++ b/eclass/flag-o-matic.eclass @@ -0,0 +1,780 @@ +# Copyright 1999-2009 Gentoo Foundation +# Distributed under the terms of the GNU General Public License v2 +# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.150 2011/02/25 10:51:44 dirtyepic Exp $ + +# @ECLASS: flag-o-matic.eclass +# @MAINTAINER: +# toolchain@gentoo.org +# @BLURB: common functions to manipulate and query toolchain flags +# @DESCRIPTION: +# This eclass contains a suite of functions to help developers sanely +# and safely manage toolchain flags in their builds. + +inherit eutils toolchain-funcs multilib + +################ DEPRECATED functions ################ +# The following are still present to avoid breaking existing +# code more than necessary; however they are deprecated. Please +# use gcc-specs-* from toolchain-funcs.eclass instead, if you +# need to know which hardened techs are active in the compiler. +# See bug #100974 +# +# has_hardened +# has_pie +# has_pic +# has_ssp_all +# has_ssp + + +# {C,CXX,F,FC}FLAGS that we allow in strip-flags +# Note: shell globs and character lists are allowed +setup-allowed-flags() { + if [[ -z ${ALLOWED_FLAGS} ]] ; then + export ALLOWED_FLAGS="-pipe" + export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" + export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" + export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow" + export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" + export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" + export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive" + export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" + fi + # allow a bunch of flags that negate features / control ABI + ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ + -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer" + ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ + -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \ + -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \ + -mno-popcnt -mno-abm \ + -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \ + -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ + -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \ + -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ + -mflat -mno-flat -mno-faster-structs -mfaster-structs \ + -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ + -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ + -msecure-plt -m*-toc -D* -U*" + + # 4.5 + ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp" + # 4.6 + ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \ + -mno-bmi -mno-tbm" + + # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing + # NOTE: currently -Os have issues with gcc3 and K6* arch's + export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" + return 0 +} + +# inverted filters for hardened compiler. This is trying to unpick +# the hardened compiler defaults. +_filter-hardened() { + local f + for f in "$@" ; do + case "${f}" in + # Ideally we should only concern ourselves with PIE flags, + # not -fPIC or -fpic, but too many places filter -fPIC without + # thinking about -fPIE. + -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) + gcc-specs-pie || continue + is-flagq -nopie || append-flags -nopie;; + -fstack-protector) + gcc-specs-ssp || continue + is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);; + -fstack-protector-all) + gcc-specs-ssp-to-all || continue + is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);; + -fno-strict-overflow) + gcc-specs-nostrict || continue + is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);; + esac + done +} + +# Remove occurrences of strings from variable given in $1 +# Strings removed are matched as globs, so for example +# '-O*' would remove -O1, -O2 etc. +_filter-var() { + local f x VAR VAL + declare -a new + + VAR=$1 + shift + eval VAL=\${${VAR}} + for f in ${VAL}; do + for x in "$@"; do + # Note this should work with globs like -O* + [[ ${f} == ${x} ]] && continue 2 + done + eval new\[\${\#new\[@]}]=\${f} + done + eval export ${VAR}=\${new\[*]} +} + +# @FUNCTION: filter-flags +# @USAGE: <flags> +# @DESCRIPTION: +# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs. +filter-flags() { + _filter-hardened "$@" + _filter-var CFLAGS "$@" + _filter-var CPPFLAGS "$@" + _filter-var CXXFLAGS "$@" + _filter-var FFLAGS "$@" + _filter-var FCFLAGS "$@" + return 0 +} + +# @FUNCTION: filter-lfs-flags +# @DESCRIPTION: +# Remove flags that enable Large File Support. +filter-lfs-flags() { + [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" + filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_LARGE_FILES -D_LARGE_FILE_API +} + +# @FUNCTION: append-cppflags +# @USAGE: <flags> +# @DESCRIPTION: +# Add extra <flags> to the current CPPFLAGS. +append-cppflags() { + [[ -z $* ]] && return 0 + export CPPFLAGS="${CPPFLAGS} $*" + return 0 +} + +# @FUNCTION: append-cflags +# @USAGE: <flags> +# @DESCRIPTION: +# Add extra <flags> to the current CFLAGS. +append-cflags() { + [[ -z $* ]] && return 0 + export CFLAGS="${CFLAGS} $*" + return 0 +} + +# @FUNCTION: append-cxxflags +# @USAGE: <flags> +# @DESCRIPTION: +# Add extra <flags> to the current CXXFLAGS. +append-cxxflags() { + [[ -z $* ]] && return 0 + export CXXFLAGS="${CXXFLAGS} $*" + return 0 +} + +# @FUNCTION: append-fflags +# @USAGE: <flags> +# @DESCRIPTION: +# Add extra <flags> to the current {F,FC}FLAGS. +append-fflags() { + [[ -z $* ]] && return 0 + export FFLAGS="${FFLAGS} $*" + export FCFLAGS="${FCFLAGS} $*" + return 0 +} + +# @FUNCTION: append-lfs-flags +# @DESCRIPTION: +# Add flags that enable Large File Support. +append-lfs-flags() { + [[ -n $@ ]] && die "append-lfs-flags takes no arguments" + case ${CHOST} in + *-aix*) append-cppflags -D_LARGE_FILES -D_LARGE_FILE_API ;; + *) append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE ;; + esac +} + +# @FUNCTION: append-flags +# @USAGE: <flags> +# @DESCRIPTION: +# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. +append-flags() { + [[ -z $* ]] && return 0 + append-cflags "$@" + append-cxxflags "$@" + append-fflags "$@" + return 0 +} + +# @FUNCTION: replace-flags +# @USAGE: <old> <new> +# @DESCRIPTION: +# Replace the <old> flag with <new>. Accepts shell globs for <old>. +replace-flags() { + [[ $# != 2 ]] \ + && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ + && die "replace-flags takes 2 arguments, not $#" + + local f fset + declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS + + for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do + # Looping over the flags instead of using a global + # substitution ensures that we're working with flag atoms. + # Otherwise globs like -O* have the potential to wipe out the + # list of flags. + for f in ${!fset}; do + # Note this should work with globs like -O* + [[ ${f} == ${1} ]] && f=${2} + eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} + done + eval export ${fset}=\${new_${fset}\[*]} + done + + return 0 +} + +# @FUNCTION: replace-cpu-flags +# @USAGE: <old> <new> +# @DESCRIPTION: +# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu +# with flags that select the <new> cpu. Accepts shell globs for <old>. +replace-cpu-flags() { + local newcpu="$#" ; newcpu="${!newcpu}" + while [ $# -gt 1 ] ; do + # quote to make sure that no globbing is done (particularly on + # ${oldcpu}) prior to calling replace-flags + replace-flags "-march=${1}" "-march=${newcpu}" + replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" + replace-flags "-mtune=${1}" "-mtune=${newcpu}" + shift + done + return 0 +} + +_is_flagq() { + local x + for x in ${!1} ; do + [[ ${x} == $2 ]] && return 0 + done + return 1 +} + +# @FUNCTION: is-flagq +# @USAGE: <flag> +# @DESCRIPTION: +# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. +is-flagq() { + [[ -n $2 ]] && die "Usage: is-flag <flag>" + _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1 +} + +# @FUNCTION: is-flag +# @USAGE: <flag> +# @DESCRIPTION: +# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs. +is-flag() { + is-flagq "$@" && echo true +} + +# @FUNCTION: is-ldflagq +# @USAGE: <flag> +# @DESCRIPTION: +# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs. +is-ldflagq() { + [[ -n $2 ]] && die "Usage: is-ldflag <flag>" + _is_flagq LDFLAGS $1 +} + +# @FUNCTION: is-ldflag +# @USAGE: <flag> +# @DESCRIPTION: +# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs. +is-ldflag() { + is-ldflagq "$@" && echo true +} + +# @FUNCTION: filter-mfpmath +# @USAGE: <math types> +# @DESCRIPTION: +# Remove specified math types from the fpmath flag. For example, if the user +# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with +# -mfpmath=386. +filter-mfpmath() { + local orig_mfpmath new_math prune_math + + # save the original -mfpmath flag + orig_mfpmath=$(get-flag -mfpmath) + # get the value of the current -mfpmath flag + new_math=$(get-flag mfpmath) + new_math=" ${new_math//,/ } " + # figure out which math values are to be removed + prune_math="" + for prune_math in "$@" ; do + new_math=${new_math/ ${prune_math} / } + done + new_math=$(echo ${new_math}) + new_math=${new_math// /,} + + if [[ -z ${new_math} ]] ; then + # if we're removing all user specified math values are + # slated for removal, then we just filter the flag + filter-flags ${orig_mfpmath} + else + # if we only want to filter some of the user specified + # math values, then we replace the current flag + replace-flags ${orig_mfpmath} -mfpmath=${new_math} + fi + return 0 +} + +# @FUNCTION: strip-flags +# @DESCRIPTION: +# Strip C[XX]FLAGS of everything except known good/safe flags. +strip-flags() { + local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS + + setup-allowed-flags + + local NEW_CFLAGS="" + local NEW_CXXFLAGS="" + local NEW_FFLAGS="" + local NEW_FCFLAGS="" + + # Allow unstable C[XX]FLAGS if we are using unstable profile ... + + # + # + # In Gentoo Prefix, this is useless. Not a problem, but on aix6 it causes + # bash to hang and I can't figure it out. So it is disabled for now. + # --darkside@g.o (14 Jan 2009) + + if use !prefix; then + if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then + ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" + fi + fi + + set -f # disable pathname expansion + + for x in ${CFLAGS}; do + for y in ${ALLOWED_FLAGS}; do + flag=${x%%=*} + if [ "${flag%%${y}}" = "" ] ; then + NEW_CFLAGS="${NEW_CFLAGS} ${x}" + break + fi + done + done + + for x in ${CXXFLAGS}; do + for y in ${ALLOWED_FLAGS}; do + flag=${x%%=*} + if [ "${flag%%${y}}" = "" ] ; then + NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" + break + fi + done + done + + for x in ${FFLAGS}; do + for y in ${ALLOWED_FLAGS}; do + flag=${x%%=*} + if [ "${flag%%${y}}" = "" ] ; then + NEW_FFLAGS="${NEW_FFLAGS} ${x}" + break + fi + done + done + + for x in ${FCFLAGS}; do + for y in ${ALLOWED_FLAGS}; do + flag=${x%%=*} + if [ "${flag%%${y}}" = "" ] ; then + NEW_FCFLAGS="${NEW_FCFLAGS} ${x}" + break + fi + done + done + + # In case we filtered out all optimization flags fallback to -O2 + if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then + NEW_CFLAGS="${NEW_CFLAGS} -O2" + fi + if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then + NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" + fi + if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then + NEW_FFLAGS="${NEW_FFLAGS} -O2" + fi + if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then + NEW_FCFLAGS="${NEW_FCFLAGS} -O2" + fi + + set +f # re-enable pathname expansion + + export CFLAGS="${NEW_CFLAGS}" + export CXXFLAGS="${NEW_CXXFLAGS}" + export FFLAGS="${NEW_FFLAGS}" + export FCFLAGS="${NEW_FCFLAGS}" + return 0 +} + +test-flag-PROG() { + local comp=$1 + local flags="$2" + + [[ -z ${comp} || -z ${flags} ]] && \ + return 1 + + local PROG=$(tc-get${comp}) + ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ + > /dev/null 2>&1 +} + +# @FUNCTION: test-flag-CC +# @USAGE: <flag> +# @DESCRIPTION: +# Returns shell true if <flag> is supported by the C compiler, else returns shell false. +test-flag-CC() { test-flag-PROG "CC" "$1"; } + +# @FUNCTION: test-flag-CXX +# @USAGE: <flag> +# @DESCRIPTION: +# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false. +test-flag-CXX() { test-flag-PROG "CXX" "$1"; } + +# @FUNCTION: test-flag-F77 +# @USAGE: <flag> +# @DESCRIPTION: +# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false. +test-flag-F77() { test-flag-PROG "F77" "$1"; } + +# @FUNCTION: test-flag-FC +# @USAGE: <flag> +# @DESCRIPTION: +# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false. +test-flag-FC() { test-flag-PROG "FC" "$1"; } + +test-flags-PROG() { + local comp=$1 + local flags + local x + + shift + + [[ -z ${comp} ]] && return 1 + + x="" + for x in "$@" ; do + test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" || \ + ewarn "removing ${x} because ${comp} rejected it" + done + + echo "${flags}" + + # Just bail if we dont have any flags + [[ -n ${flags} ]] +} + +# @FUNCTION: test-flags-CC +# @USAGE: <flags> +# @DESCRIPTION: +# Returns shell true if <flags> are supported by the C compiler, else returns shell false. +test-flags-CC() { test-flags-PROG "CC" "$@"; } + +# @FUNCTION: test-flags-CXX +# @USAGE: <flags> +# @DESCRIPTION: +# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false. +test-flags-CXX() { test-flags-PROG "CXX" "$@"; } + +# @FUNCTION: test-flags-F77 +# @USAGE: <flags> +# @DESCRIPTION: +# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false. +test-flags-F77() { test-flags-PROG "F77" "$@"; } + +# @FUNCTION: test-flags-FC +# @USAGE: <flags> +# @DESCRIPTION: +# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false. +test-flags-FC() { test-flags-PROG "FC" "$@"; } + +# @FUNCTION: test-flags +# @USAGE: <flags> +# @DESCRIPTION: +# Short-hand that should hopefully work for both C and C++ compiler, but +# its really only present due to the append-flags() abomination. +test-flags() { test-flags-CC "$@"; } + +# @FUNCTION: test_flag +# @DESCRIPTION: +# DEPRICIATED, use test-flags() +test_flag() { + ewarn "test_flag: deprecated, please use test-flags()!" >&2 + + test-flags-CC "$@" +} + +# @FUNCTION: test_version_info +# @USAGE: <version> +# @DESCRIPTION: +# Returns shell true if the current C compiler version matches <version>, else returns shell false. +# Accepts shell globs. +test_version_info() { + if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then + return 0 + else + return 1 + fi +} + +# @FUNCTION: strip-unsupported-flags +# @DESCRIPTION: +# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain. +strip-unsupported-flags() { + export CFLAGS=$(test-flags-CC ${CFLAGS}) + export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) + export FFLAGS=$(test-flags-F77 ${FFLAGS}) + export FCFLAGS=$(test-flags-FC ${FCFLAGS}) +} + +# @FUNCTION: get-flag +# @USAGE: <flag> +# @DESCRIPTION: +# Find and echo the value for a particular flag. Accepts shell globs. +get-flag() { + local f findflag="$1" + + # this code looks a little flaky but seems to work for + # everything we want ... + # for example, if CFLAGS="-march=i686": + # `get-flag -march` == "-march=i686" + # `get-flag march` == "i686" + for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do + if [ "${f/${findflag}}" != "${f}" ] ; then + printf "%s\n" "${f/-${findflag}=}" + return 0 + fi + done + return 1 +} + +# @FUNCTION: has_hardened +# @DESCRIPTION: +# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs +has_hardened() { + ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 + + test_version_info Hardened && return 0 + # The specs file wont exist unless gcc has GCC_SPECS support + [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] +} + +# @FUNCTION: has_pic +# @DESCRIPTION: +# DEPRECATED - use gcc-specs-pie from toolchain-funcs +# indicate whether PIC is set +has_pic() { + ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 + + [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ + ${CFLAGS/-fpic} != ${CFLAGS} ]] || \ + gcc-specs-pie +} + +# @FUNCTION: has_pie +# @DESCRIPTION: +# DEPRECATED - use gcc-specs-pie from toolchain-funcs +# indicate whether PIE is set +has_pie() { + ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 + + [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ + ${CFLAGS/-fpie} != ${CFLAGS} ]] || \ + gcc-specs-pie +} + +# @FUNCTION: has_ssp_all +# @DESCRIPTION: +# DEPRECATED - use gcc-specs-ssp from toolchain-funcs +# indicate whether code for SSP is being generated for all functions +has_ssp_all() { + ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 + + # note; this matches only -fstack-protector-all + [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ + -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ + gcc-specs-ssp-to-all +} + +# @FUNCTION: has_ssp +# @DESCRIPTION: +# DEPRECATED - use gcc-specs-ssp from toolchain-funcs +# indicate whether code for SSP is being generated +has_ssp() { + ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 + + # note; this matches both -fstack-protector and -fstack-protector-all + [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ + -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ + gcc-specs-ssp +} + +# @FUNCTION: has_m64 +# @DESCRIPTION: +# This doesn't test if the flag is accepted, it tests if the flag actually +# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works +# return code is 0, else the return code is 1. +has_m64() { + # this doesnt test if the flag is accepted, it tests if the flag + # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! + # please dont replace this function with test_flag in some future + # clean-up! + + local temp="$(emktemp)" + echo "int main() { return(0); }" > "${temp}".c + MY_CC=$(tc-getCC) + ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 + local ret=$? + rm -f "${temp}".c + [[ ${ret} != 1 ]] && return 0 + return 1 +} + +# @FUNCTION: has_m32 +# @DESCRIPTION: +# This doesn't test if the flag is accepted, it tests if the flag actually +# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return +# code is 0, else return code is 1. +has_m32() { + # this doesnt test if the flag is accepted, it tests if the flag + # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! + # please dont replace this function with test_flag in some future + # clean-up! + + [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 + + local temp=$(emktemp) + echo "int main() { return(0); }" > "${temp}".c + MY_CC=$(tc-getCC) + ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 + local ret=$? + rm -f "${temp}".c + [[ ${ret} != 1 ]] && return 0 + return 1 +} + +# @FUNCTION: replace-sparc64-flags +# @DESCRIPTION: +# Sets mcpu to v8 and uses the original value as mtune if none specified. +replace-sparc64-flags() { + local SPARC64_CPUS="ultrasparc3 ultrasparc v9" + + if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then + for x in ${SPARC64_CPUS}; do + CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" + done + else + for x in ${SPARC64_CPUS}; do + CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" + done + fi + + if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then + for x in ${SPARC64_CPUS}; do + CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" + done + else + for x in ${SPARC64_CPUS}; do + CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" + done + fi + + export CFLAGS CXXFLAGS +} + +# @FUNCTION: append-libs +# @USAGE: <libs> +# @DESCRIPTION: +# Add extra <libs> to the current LIBS. +append-libs() { + [[ -z $* ]] && return 0 + local flag + for flag in "$@"; do + [[ ${flag} == -l* ]] && flag=${flag#-l} + export LIBS="${LIBS} -l${flag}" + done + + return 0 +} + +# @FUNCTION: append-ldflags +# @USAGE: <flags> +# @DESCRIPTION: +# Add extra <flags> to the current LDFLAGS. +append-ldflags() { + [[ -z $* ]] && return 0 + local flag + for flag in "$@"; do + [[ ${flag} == -l* ]] && \ + ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" + done + + export LDFLAGS="${LDFLAGS} $(test-flags "$@")" + return 0 +} + +# @FUNCTION: filter-ldflags +# @USAGE: <flags> +# @DESCRIPTION: +# Remove particular <flags> from LDFLAGS. Accepts shell globs. +filter-ldflags() { + _filter-var LDFLAGS "$@" + return 0 +} + +# @FUNCTION: raw-ldflags +# @USAGE: <flags> +# @DESCRIPTION: +# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results +# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed +# to gcc where it needs the '-Wl,'. +raw-ldflags() { + local x input="$@" + [[ -z ${input} ]] && input=${LDFLAGS} + set -- + for x in ${input} ; do + x=${x#-Wl,} + set -- "$@" ${x//,/ } + done + echo "$@" +} + +# @FUNCTION: no-as-needed +# @RETURN: Flag to disable asneeded behavior for use with append-ldflags. +no-as-needed() { + case $($(tc-getLD) -v 2>&1 </dev/null) in + *GNU*) # GNU ld + echo "-Wl,--no-as-needed" ;; + esac +} + +# Some tests for when we screw with things and want to make +# sure we didn't break anything +#TESTS() { +# CFLAGS="-a -b -c=1" +# CXXFLAGS="-x -y -z=2" +# LDFLAGS="-l -m -n=3" +# +# die() { exit 1; } +# (is-flag 1 2 3) && die +# (is-ldflag 1 2 3) && die +# +# is-flagq -l && die +# is-ldflagq -a && die +# is-flagq -a || die +# is-flagq -x || die +# is-ldflagq -n=* || die +# is-ldflagq -n && die +# +# strip-unsupported-flags +# [[ ${CFLAGS} == "-c=1" ]] || die +# [[ ${CXXFLAGS} == "-y -z=2" ]] || die +# +# echo "All tests pass" +#} +#TESTS |