| 1 |
# Copyright 1999-2003 Gentoo Technologies, Inc.
|
| 2 |
# Distributed under the terms of the GNU General Public License v2
|
| 3 |
# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.56 2004/06/10 00:24:57 lv Exp $
|
| 4 |
#
|
| 5 |
# Author Bart Verwilst <verwilst@gentoo.org>
|
| 6 |
|
| 7 |
ECLASS=flag-o-matic
|
| 8 |
INHERITED="$INHERITED $ECLASS"
|
| 9 |
IUSE="$IUSE debug"
|
| 10 |
|
| 11 |
#
|
| 12 |
#### filter-flags <flags> ####
|
| 13 |
# Remove particular flags from C[XX]FLAGS
|
| 14 |
# Matches only complete flags
|
| 15 |
#
|
| 16 |
#### append-flags <flags> ####
|
| 17 |
# Add extra flags to your current C[XX]FLAGS
|
| 18 |
#
|
| 19 |
#### replace-flags <orig.flag> <new.flag> ###
|
| 20 |
# Replace a flag by another one
|
| 21 |
#
|
| 22 |
#### replace-cpu-flags <new.cpu> <old.cpus> ###
|
| 23 |
# Replace march/mcpu flags that specify <old.cpus>
|
| 24 |
# with flags that specify <new.cpu>
|
| 25 |
#
|
| 26 |
#### is-flag <flag> ####
|
| 27 |
# Returns "true" if flag is set in C[XX]FLAGS
|
| 28 |
# Matches only complete a flag
|
| 29 |
#
|
| 30 |
#### strip-flags ####
|
| 31 |
# Strip C[XX]FLAGS of everything except known
|
| 32 |
# good options.
|
| 33 |
#
|
| 34 |
#### strip-unsupported-flags ####
|
| 35 |
# Strip C[XX]FLAGS of any flags not supported by
|
| 36 |
# installed version of gcc
|
| 37 |
#
|
| 38 |
#### get-flag <flag> ####
|
| 39 |
# Find and echo the value for a particular flag
|
| 40 |
#
|
| 41 |
#### replace-sparc64-flags ####
|
| 42 |
# Sets mcpu to v8 and uses the original value
|
| 43 |
# as mtune if none specified.
|
| 44 |
#
|
| 45 |
#### filter-mfpmath <math types> ####
|
| 46 |
# Remove specified math types from the fpmath specification
|
| 47 |
# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
|
| 48 |
# will leave the user with -mfpmath=386
|
| 49 |
#
|
| 50 |
#### append-ldflags ####
|
| 51 |
# Add extra flags to your current LDFLAGS
|
| 52 |
#
|
| 53 |
#### filter-ldflags <flags> ####
|
| 54 |
# Remove particular flags from LDFLAGS
|
| 55 |
# Matches only complete flags
|
| 56 |
#
|
| 57 |
#### etexec-flags ####
|
| 58 |
# hooked function for hardened gcc that appends
|
| 59 |
# -fno-pic to {C,CXX,LD}FLAGS
|
| 60 |
# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
|
| 61 |
#
|
| 62 |
#### fstack-flags ####
|
| 63 |
# hooked function for hardened gcc that appends
|
| 64 |
# -fno-stack-protector to {C,CXX,LD}FLAGS
|
| 65 |
# when a package is filtering -fstack-protector, -fstack-protector-all
|
| 66 |
# notice: modern automatic specs files will also suppress -fstack-protector-all
|
| 67 |
# when only -fno-stack-protector is given
|
| 68 |
#
|
| 69 |
|
| 70 |
# C[XX]FLAGS that we allow in strip-flags
|
| 71 |
setup-allowed-flags() {
|
| 72 |
if [ -z "${ALLOWED_FLAGS}" ] ; then
|
| 73 |
export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
|
| 74 |
case "${ARCH}" in
|
| 75 |
mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
|
| 76 |
amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
|
| 77 |
x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
|
| 78 |
alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
|
| 79 |
ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
|
| 80 |
esac
|
| 81 |
fi
|
| 82 |
|
| 83 |
# C[XX]FLAGS that we are think is ok, but needs testing
|
| 84 |
# NOTE: currently -Os have issues with gcc3 and K6* arch's
|
| 85 |
export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
|
| 86 |
return 0
|
| 87 |
}
|
| 88 |
|
| 89 |
filter-flags() {
|
| 90 |
for x in "$@" ; do
|
| 91 |
case "${x}" in
|
| 92 |
-fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
|
| 93 |
-fstack-protector|-fstack-protector-all) fstack-flags;;
|
| 94 |
*) ;;
|
| 95 |
esac
|
| 96 |
done
|
| 97 |
|
| 98 |
# we do this fancy spacing stuff so as to not filter
|
| 99 |
# out part of a flag ... we want flag atoms ! :D
|
| 100 |
CFLAGS=" ${CFLAGS} "
|
| 101 |
CXXFLAGS=" ${CXXFLAGS} "
|
| 102 |
for x in "$@" ; do
|
| 103 |
CFLAGS="${CFLAGS// ${x} / }"
|
| 104 |
CXXFLAGS="${CXXFLAGS// ${x} / }"
|
| 105 |
done
|
| 106 |
CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
|
| 107 |
CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
|
| 108 |
return 0
|
| 109 |
}
|
| 110 |
|
| 111 |
filter-lfs-flags() {
|
| 112 |
filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
|
| 113 |
}
|
| 114 |
|
| 115 |
append-lfs-flags() {
|
| 116 |
append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
|
| 117 |
}
|
| 118 |
|
| 119 |
append-flags() {
|
| 120 |
export CFLAGS="${CFLAGS} $@"
|
| 121 |
export CXXFLAGS="${CXXFLAGS} $@"
|
| 122 |
[ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
|
| 123 |
return 0
|
| 124 |
}
|
| 125 |
|
| 126 |
replace-flags() {
|
| 127 |
# we do this fancy spacing stuff so as to not filter
|
| 128 |
# out part of a flag ... we want flag atoms ! :D
|
| 129 |
CFLAGS=" ${CFLAGS} "
|
| 130 |
CXXFLAGS=" ${CXXFLAGS} "
|
| 131 |
CFLAGS="${CFLAGS// ${1} / ${2} }"
|
| 132 |
CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
|
| 133 |
CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
|
| 134 |
CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
|
| 135 |
return 0
|
| 136 |
}
|
| 137 |
|
| 138 |
replace-cpu-flags() {
|
| 139 |
local newcpu="$1" ; shift
|
| 140 |
local oldcpu=""
|
| 141 |
for oldcpu in "$@" ; do
|
| 142 |
replace-flags -march=${oldcpu} -march=${newcpu}
|
| 143 |
replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
|
| 144 |
replace-flags -mtune=${oldcpu} -mtune=${newcpu}
|
| 145 |
done
|
| 146 |
return 0
|
| 147 |
}
|
| 148 |
|
| 149 |
is-flag() {
|
| 150 |
for x in ${CFLAGS} ${CXXFLAGS} ; do
|
| 151 |
if [ "${x}" == "$1" ] ; then
|
| 152 |
echo true
|
| 153 |
return 0
|
| 154 |
fi
|
| 155 |
done
|
| 156 |
return 1
|
| 157 |
}
|
| 158 |
|
| 159 |
filter-mfpmath() {
|
| 160 |
# save the original -mfpmath flag
|
| 161 |
local orig_mfpmath="`get-flag -mfpmath`"
|
| 162 |
# get the value of the current -mfpmath flag
|
| 163 |
local new_math=" `get-flag mfpmath | tr , ' '` "
|
| 164 |
# figure out which math values are to be removed
|
| 165 |
local prune_math=""
|
| 166 |
for prune_math in "$@" ; do
|
| 167 |
new_math="${new_math/ ${prune_math} / }"
|
| 168 |
done
|
| 169 |
new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
|
| 170 |
|
| 171 |
if [ -z "${new_math}" ] ; then
|
| 172 |
# if we're removing all user specified math values are
|
| 173 |
# slated for removal, then we just filter the flag
|
| 174 |
filter-flags ${orig_mfpmath}
|
| 175 |
else
|
| 176 |
# if we only want to filter some of the user specified
|
| 177 |
# math values, then we replace the current flag
|
| 178 |
replace-flags ${orig_mfpmath} -mfpmath=${new_math}
|
| 179 |
fi
|
| 180 |
return 0
|
| 181 |
}
|
| 182 |
|
| 183 |
strip-flags() {
|
| 184 |
setup-allowed-flags
|
| 185 |
|
| 186 |
local NEW_CFLAGS=""
|
| 187 |
local NEW_CXXFLAGS=""
|
| 188 |
|
| 189 |
# Allow unstable C[XX]FLAGS if we are using unstable profile ...
|
| 190 |
if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
|
| 191 |
use debug && einfo "Enabling the use of some unstable flags"
|
| 192 |
ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
|
| 193 |
fi
|
| 194 |
|
| 195 |
set -f
|
| 196 |
|
| 197 |
for x in ${CFLAGS}
|
| 198 |
do
|
| 199 |
for y in ${ALLOWED_FLAGS}
|
| 200 |
do
|
| 201 |
flag=${x%%=*}
|
| 202 |
if [ "${flag%%${y}}" = "" ]
|
| 203 |
then
|
| 204 |
NEW_CFLAGS="${NEW_CFLAGS} ${x}"
|
| 205 |
break
|
| 206 |
fi
|
| 207 |
done
|
| 208 |
done
|
| 209 |
|
| 210 |
for x in ${CXXFLAGS}
|
| 211 |
do
|
| 212 |
for y in ${ALLOWED_FLAGS}
|
| 213 |
do
|
| 214 |
flag=${x%%=*}
|
| 215 |
if [ "${flag%%${y}}" = "" ]
|
| 216 |
then
|
| 217 |
NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
|
| 218 |
break
|
| 219 |
fi
|
| 220 |
done
|
| 221 |
done
|
| 222 |
|
| 223 |
# In case we filtered out all optimization flags fallback to -O2
|
| 224 |
if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
|
| 225 |
NEW_CFLAGS="${NEW_CFLAGS} -O2"
|
| 226 |
fi
|
| 227 |
if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
|
| 228 |
NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
|
| 229 |
fi
|
| 230 |
|
| 231 |
set +f
|
| 232 |
|
| 233 |
use debug \
|
| 234 |
&& einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
|
| 235 |
&& einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
|
| 236 |
|
| 237 |
export CFLAGS="${NEW_CFLAGS}"
|
| 238 |
export CXXFLAGS="${NEW_CXXFLAGS}"
|
| 239 |
return 0
|
| 240 |
}
|
| 241 |
|
| 242 |
test_flag() {
|
| 243 |
if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then
|
| 244 |
echo "$@"
|
| 245 |
return 0
|
| 246 |
fi
|
| 247 |
return 1
|
| 248 |
}
|
| 249 |
|
| 250 |
strip-unsupported-flags() {
|
| 251 |
for x in ${CFLAGS} ; do
|
| 252 |
NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
|
| 253 |
done
|
| 254 |
for x in ${CXXFLAGS} ; do
|
| 255 |
NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
|
| 256 |
done
|
| 257 |
|
| 258 |
export CFLAGS="${NEW_CFLAGS}"
|
| 259 |
export CXXFLAGS="${NEW_CXXFLAGS}"
|
| 260 |
}
|
| 261 |
|
| 262 |
get-flag() {
|
| 263 |
# this code looks a little flaky but seems to work for
|
| 264 |
# everything we want ...
|
| 265 |
# for example, if CFLAGS="-march=i686":
|
| 266 |
# `get-flags -march` == "-march=i686"
|
| 267 |
# `get-flags march` == "i686"
|
| 268 |
local findflag="$1"
|
| 269 |
for f in ${CFLAGS} ${CXXFLAGS} ; do
|
| 270 |
if [ "${f/${findflag}}" != "${f}" ] ; then
|
| 271 |
echo "${f/-${findflag}=}"
|
| 272 |
return 0
|
| 273 |
fi
|
| 274 |
done
|
| 275 |
return 1
|
| 276 |
}
|
| 277 |
|
| 278 |
has_hardened() {
|
| 279 |
local cc=${CC:-gcc}
|
| 280 |
[[ $(${cc%% *} --version 2>&1) == *Hardened* ]]
|
| 281 |
return $?
|
| 282 |
}
|
| 283 |
|
| 284 |
has_pic() {
|
| 285 |
[ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
|
| 286 |
[ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
|
| 287 |
[ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
|
| 288 |
return 1
|
| 289 |
}
|
| 290 |
|
| 291 |
has_pie() {
|
| 292 |
[ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
|
| 293 |
[ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
|
| 294 |
[ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
|
| 295 |
return 1
|
| 296 |
}
|
| 297 |
|
| 298 |
has_ssp() {
|
| 299 |
[ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
|
| 300 |
[ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
|
| 301 |
return 1
|
| 302 |
}
|
| 303 |
|
| 304 |
has_m64() {
|
| 305 |
temp=`mktemp`
|
| 306 |
echo "int main() { return(0); }" > ${temp}.c
|
| 307 |
${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
|
| 308 |
ret=$?
|
| 309 |
rm -f ${temp}.c
|
| 310 |
[ "$ret" != "1" ] && return 0
|
| 311 |
return 1
|
| 312 |
}
|
| 313 |
|
| 314 |
has_m32() {
|
| 315 |
temp=`mktemp`
|
| 316 |
echo "int main() { return(0); }" > ${temp}.c
|
| 317 |
${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
|
| 318 |
ret=$?
|
| 319 |
rm -f ${temp}.c
|
| 320 |
[ "$ret" != "1" ] && return 0
|
| 321 |
return 1
|
| 322 |
}
|
| 323 |
|
| 324 |
replace-sparc64-flags() {
|
| 325 |
local SPARC64_CPUS="ultrasparc v9"
|
| 326 |
|
| 327 |
if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
|
| 328 |
then
|
| 329 |
for x in ${SPARC64_CPUS}
|
| 330 |
do
|
| 331 |
CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
|
| 332 |
done
|
| 333 |
else
|
| 334 |
for x in ${SPARC64_CPUS}
|
| 335 |
do
|
| 336 |
CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
|
| 337 |
done
|
| 338 |
fi
|
| 339 |
|
| 340 |
if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
|
| 341 |
then
|
| 342 |
for x in ${SPARC64_CPUS}
|
| 343 |
do
|
| 344 |
CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
|
| 345 |
done
|
| 346 |
else
|
| 347 |
for x in ${SPARC64_CPUS}
|
| 348 |
do
|
| 349 |
CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
|
| 350 |
done
|
| 351 |
fi
|
| 352 |
}
|
| 353 |
|
| 354 |
append-ldflags() {
|
| 355 |
LDFLAGS="${LDFLAGS} $@"
|
| 356 |
return 0
|
| 357 |
}
|
| 358 |
|
| 359 |
filter-ldflags() {
|
| 360 |
# we do this fancy spacing stuff so as to not filter
|
| 361 |
# out part of a flag ... we want flag atoms ! :D
|
| 362 |
LDFLAGS=" ${LDFLAGS} "
|
| 363 |
for x in "$@" ; do
|
| 364 |
LDFLAGS="${LDFLAGS// ${x} / }"
|
| 365 |
done
|
| 366 |
LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
|
| 367 |
return 0
|
| 368 |
}
|
| 369 |
|
| 370 |
etexec-flags() {
|
| 371 |
# if your not using a hardened compiler you wont need this
|
| 372 |
# PIC/no-pic kludge in the first place.
|
| 373 |
has_hardened || return
|
| 374 |
|
| 375 |
has_pie || has_pic
|
| 376 |
if [ $? == 0 ] ; then
|
| 377 |
[ -z "`is-flag -fno-pic`" ] &&
|
| 378 |
export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
|
| 379 |
|
| 380 |
[ -z "`is-flag -nopie`" ] &&
|
| 381 |
export CFLAGS="${CFLAGS} `test_flag -nopie`"
|
| 382 |
fi
|
| 383 |
}
|
| 384 |
|
| 385 |
fstack-flags() {
|
| 386 |
has_ssp
|
| 387 |
if [ $? == 0 ] ; then
|
| 388 |
[ -z "`is-flag -fno-stack-protector`" ] &&
|
| 389 |
export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
|
| 390 |
fi
|
| 391 |
}
|
| 392 |
|
Parent Directory
| 
Revision Log