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# Copyright 1999-2003 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.26 2003/09/15 15:21:04 vapier Exp $
#
# Author Bart Verwilst <verwilst@gentoo.org>
ECLASS=flag-o-matic
INHERITED="$INHERITED $ECLASS"
#
#### filter-flags <flags> ####
# Remove particular flags from C[XX]FLAGS
# Matches only complete flags
#
#### append-flags <flags> ####
# Add extra flags to your current C[XX]FLAGS
#
#### replace-flags <orig.flag> <new.flag> ###
# Replace a flag by another one
#
#### is-flag <flag> ####
# Returns "true" if flag is set in C[XX]FLAGS
# Matches only complete a flag
#
#### strip-flags ####
# Strip C[XX]FLAGS of everything except known
# good options.
#
#### get-flag <flag> ####
# Find and echo the value for a particular flag
#
#### replace-sparc64-flags ####
# Sets mcpu to v8 and uses the original value
# as mtune if none specified.
#
#### filter-mfpmath <math types> ####
# Remove specified math types from the fpmath specification
# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
# will leave the user with -mfpmath=386
# C[XX]FLAGS that we allow in strip-flags
ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
case "${ARCH}" in
mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
esac
# C[XX]FLAGS that we are think is ok, but needs testing
# NOTE: currently -Os have issues with gcc3 and K6* arch's
UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
filter-mfpmath() {
for a in $CFLAGS; do
if [ "${a:0:8}" == "-mfpmath" ]; then
orig_mfpmath=$a
fi
done
mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
for b in $@; do
mfpmath="${mfpmath/$b}"
done
if [ -z "${mfpmath/ }" ]; then
filter-flags "$orig_mfpmath"
else
new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
replace-flags "$orig_mfpmath" "$new_mfpmath"
fi
}
filter-flags() {
# we do this fancy spacing stuff so as to not filter
# out part of a flag ... we want flag atoms ! :D
CFLAGS=" ${CFLAGS} "
CXXFLAGS=" ${CXXFLAGS} "
for x in $@ ; do
CFLAGS="${CFLAGS/ ${x} / }"
CXXFLAGS="${CXXFLAGS/ ${x} / }"
done
CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
}
append-flags() {
CFLAGS="${CFLAGS} $@"
CXXFLAGS="${CXXFLAGS} $@"
}
replace-flags() {
CFLAGS="${CFLAGS/${1}/${2} }"
CXXFLAGS="${CXXFLAGS/${1}/${2} }"
}
is-flag() {
for x in ${CFLAGS} ${CXXFLAGS} ; do
if [ "${x}" == "$1" ] ; then
echo true
return 0
fi
done
return 1
}
strip-flags() {
local NEW_CFLAGS=""
local NEW_CXXFLAGS=""
# Allow unstable C[XX]FLAGS if we are using unstable profile ...
if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
[ `use debug` ] && einfo "Enabling the use of some unstable flags"
ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
fi
set -f
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} ${x}"
break
fi
done
done
set +f
[ `use debug` ] \
&& einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
&& einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
export CFLAGS="${NEW_CFLAGS}"
export CXXFLAGS="${NEW_CXXFLAGS}"
}
get-flag() {
local findflag="$1"
for f in ${CFLAGS} ${CXXFLAGS} ; do
if [ "${f/${findflag}}" != "${f}" ] ; then
echo "${f/-${findflag}=}"
return
fi
done
}
replace-sparc64-flags() {
local SPARC64_CPUS="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
}
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