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# Copyright 1999-2003 Gentoo Technologies, Inc.
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# Distributed under the terms of the GNU General Public License v2
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# $Header: /home/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.31 2003/12/10 21:13:25 agriffis Exp $
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#
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# Author Bart Verwilst <verwilst@gentoo.org>
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ECLASS=flag-o-matic
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INHERITED="$INHERITED $ECLASS"
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#
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#### filter-flags <flags> ####
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# Remove particular flags from C[XX]FLAGS
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# Matches only complete flags
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#
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#### append-flags <flags> ####
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# Add extra flags to your current C[XX]FLAGS
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#
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#### replace-flags <orig.flag> <new.flag> ###
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# Replace a flag by another one
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#
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#### is-flag <flag> ####
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# Returns "true" if flag is set in C[XX]FLAGS
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# Matches only complete a flag
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#
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#### strip-flags ####
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# Strip C[XX]FLAGS of everything except known
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# good options.
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#
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#### strip-unsupported-flags ####
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# Strip C[XX]FLAGS of any flags not supported by
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# installed version of gcc
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#
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#### get-flag <flag> ####
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# Find and echo the value for a particular flag
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#
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#### replace-sparc64-flags ####
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# Sets mcpu to v8 and uses the original value
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# as mtune if none specified.
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#
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#### filter-mfpmath <math types> ####
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# Remove specified math types from the fpmath specification
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# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
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# will leave the user with -mfpmath=386
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#
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#### append-ldflags ####
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# Add extra flags to your current LDFLAGS
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#
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#### etexec-flags ####
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# hooked function for hardened-gcc that appends
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# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
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# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
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#
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#### fstack-flags ####
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# hooked function for hardened-gcc that appends
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# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
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# and a package is filtering -fstack-protector, -fstack-protector-all
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#
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# C[XX]FLAGS that we allow in strip-flags
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ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
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case "${ARCH}" in
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mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
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amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
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alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
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ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
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esac
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# C[XX]FLAGS that we are think is ok, but needs testing
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# NOTE: currently -Os have issues with gcc3 and K6* arch's
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UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
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filter-mfpmath() {
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for a in $CFLAGS; do
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if [ "${a:0:8}" == "-mfpmath" ]; then
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orig_mfpmath=$a
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fi
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done
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mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
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for b in $@; do
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mfpmath="${mfpmath/$b}"
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done
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if [ -z "${mfpmath/ }" ]; then
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filter-flags "$orig_mfpmath"
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else
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new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
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replace-flags "$orig_mfpmath" "$new_mfpmath"
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fi
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}
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filter-flags() {
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# we do two loops to avoid the first and last char from being chomped.
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for x in $@ ; do
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case "${x}" in
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-fPIC|-fpic|-fPIE|-fpie) etexec-flags;;
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-fstack-protector|-fstack-protector-all) fstack-flags;;
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*) ;;
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esac
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done
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# we do this fancy spacing stuff so as to not filter
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# out part of a flag ... we want flag atoms ! :D
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CFLAGS=" ${CFLAGS} "
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CXXFLAGS=" ${CXXFLAGS} "
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for x in $@ ; do
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CFLAGS="${CFLAGS/ ${x} / }"
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CXXFLAGS="${CXXFLAGS/ ${x} / }"
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done
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CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
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CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
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}
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append-flags() {
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CFLAGS="${CFLAGS} $@"
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CXXFLAGS="${CXXFLAGS} $@"
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for x in $@; do
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[ "${x}" = "-fno-stack-protector" -o "${x}" = "-fno-stack-protector-all" ] && fstack-flags
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done
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return 0
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}
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replace-flags() {
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CFLAGS="${CFLAGS/${1}/${2} }"
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CXXFLAGS="${CXXFLAGS/${1}/${2} }"
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return 0
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}
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is-flag() {
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for x in ${CFLAGS} ${CXXFLAGS} ; do
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if [ "${x}" == "$1" ] ; then
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echo true
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return 0
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fi
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done
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return 1
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}
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strip-flags() {
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local NEW_CFLAGS=""
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local NEW_CXXFLAGS=""
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# Allow unstable C[XX]FLAGS if we are using unstable profile ...
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if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
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[ `use debug` ] && einfo "Enabling the use of some unstable flags"
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ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
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fi
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set -f
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for x in ${CFLAGS}
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do
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for y in ${ALLOWED_FLAGS}
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do
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flag=${x%%=*}
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if [ "${flag%%${y}}" = "" ]
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then
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NEW_CFLAGS="${NEW_CFLAGS} ${x}"
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break
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fi
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done
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done
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for x in ${CXXFLAGS}
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do
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for y in ${ALLOWED_FLAGS}
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do
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flag=${x%%=*}
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if [ "${flag%%${y}}" = "" ]
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then
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NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
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break
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fi
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done
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done
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# In case we filtered out all optimization flags fallback to -O2
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if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
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NEW_CFLAGS="${NEW_CFLAGS} -O2"
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fi
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if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
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NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
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fi
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set +f
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[ `use debug` ] \
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&& einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
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&& einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
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export CFLAGS="${NEW_CFLAGS}"
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export CXXFLAGS="${NEW_CXXFLAGS}"
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}
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test_flag () {
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if gcc -S -xc $1 -o /dev/null /dev/null >/dev/null 2>&1; then
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echo "$1"
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fi
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}
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strip-unsupported-flags() {
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for x in ${CFLAGS}
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do
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NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
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done
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for x in ${CXXFLAGS}
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do
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NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
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done
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CFLAGS="${NEW_CFLAGS}"
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CXXFLAGS="${NEW_CXXFLAGS}"
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}
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get-flag() {
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local findflag="$1"
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for f in ${CFLAGS} ${CXXFLAGS} ; do
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if [ "${f/${findflag}}" != "${f}" ] ; then
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echo "${f/-${findflag}=}"
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return 0
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fi
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done
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return 1
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}
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replace-sparc64-flags() {
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local SPARC64_CPUS="ultrasparc v9"
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if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
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then
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for x in ${SPARC64_CPUS}
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do
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CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
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done
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else
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for x in ${SPARC64_CPUS}
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do
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CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
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done
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fi
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if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
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then
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for x in ${SPARC64_CPUS}
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do
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CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
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done
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else
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for x in ${SPARC64_CPUS}
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do
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CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
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done
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fi
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}
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append-ldflags() {
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LDFLAGS="${LDFLAGS} $@"
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return 0
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}
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etexec-flags() {
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has_version 'sys-devel/hardened-gcc' && {
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debug-print ">>> appending flags -yet_exec"
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append-flags -yet_exec
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append-ldflags -yet_exec
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}
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}
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fstack-flags() {
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has_version 'sys-devel/hardened-gcc' && {
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debug-print ">>> appending flags -yno_propolice"
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append-flags -yno_propolice
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append-ldflags -yno_propolice
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}
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}
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