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Revision 1.11 Revision 1.73
1# Copyright 1999-2002 Gentoo Technologies, Inc. 1# Copyright 1999-2004 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.73 2004/10/13 14:11:52 vapier Exp $
4#
3# Author Bart Verwilst <verwilst@gentoo.org> 5# Author Bart Verwilst <verwilst@gentoo.org>
4# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.11 2002/12/22 12:11:56 cretin Exp $
5 6
6ECLASS=flag-o-matic 7ECLASS=flag-o-matic
7INHERITED="$INHERITED $ECLASS" 8INHERITED="$INHERITED $ECLASS"
8 9
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
12IUSE="${IUSE} debug"
13
14# need access to emktemp()
15inherit eutils
16
9# 17#
10#### filter-flags <flag> #### 18#### filter-flags <flags> ####
11# Remove particular flags from C[XX]FLAGS 19# Remove particular flags from C[XX]FLAGS
20# Matches only complete flags
12# 21#
13#### append-flags <flag> #### 22#### append-flags <flags> ####
14# Add extra flags to your current C[XX]FLAGS 23# Add extra flags to your current C[XX]FLAGS
15# 24#
16#### replace-flags <orig.flag> <new.flag> ### 25#### replace-flags <orig.flag> <new.flag> ###
17# Replace a flag by another one 26# Replace a flag by another one
18# 27#
28#### replace-cpu-flags <old.cpus> <new.cpu> ###
29# Replace march/mcpu flags that specify <old.cpus>
30# with flags that specify <new.cpu>
31#
19#### is-flag <flag> #### 32#### is-flag <flag> ####
20# Returns "true" if flag is set in C[XX]FLAGS 33# Returns "true" if flag is set in C[XX]FLAGS
21# Matches only complete flag 34# Matches only complete a flag
22# 35#
23#### strip-flags #### 36#### strip-flags ####
24# Strip C[XX]FLAGS of everything except known 37# Strip C[XX]FLAGS of everything except known
25# good options. 38# good options.
26# 39#
40#### strip-unsupported-flags ####
41# Strip C[XX]FLAGS of any flags not supported by
42# installed version of gcc
43#
27#### get-flag <flag> #### 44#### get-flag <flag> ####
28# Find and echo the value for a particular flag 45# Find and echo the value for a particular flag
29# 46#
47#### replace-sparc64-flags ####
48# Sets mcpu to v8 and uses the original value
49# as mtune if none specified.
50#
51#### filter-mfpmath <math types> ####
52# Remove specified math types from the fpmath specification
53# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
54# will leave the user with -mfpmath=386
55#
56#### append-ldflags ####
57# Add extra flags to your current LDFLAGS
58#
59#### filter-ldflags <flags> ####
60# Remove particular flags from LDFLAGS
61# Matches only complete flags
62#
63#### etexec-flags ####
64# hooked function for hardened gcc that appends
65# -fno-pic to {C,CXX,LD}FLAGS
66# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
67#
68#### fstack-flags ####
69# hooked function for hardened gcc that appends
70# -fno-stack-protector to {C,CXX,LD}FLAGS
71# when a package is filtering -fstack-protector, -fstack-protector-all
72# notice: modern automatic specs files will also suppress -fstack-protector-all
73# when only -fno-stack-protector is given
74#
30 75
76# C[XX]FLAGS that we allow in strip-flags
77setup-allowed-flags() {
78 if [ -z "${ALLOWED_FLAGS}" ] ; then
79 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g"
80 case "${ARCH}" in
81 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
82 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
83 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
84 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
85 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
86 esac
87 fi
88 # allow a bunch of flags that negate features / control ABI
89 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
90 case "${ARCH}" in
91 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
92 esac
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
94
95 # C[XX]FLAGS that we are think is ok, but needs testing
96 # NOTE: currently -Os have issues with gcc3 and K6* arch's
97 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
98 return 0
99}
100
31filter-flags () { 101filter-flags() {
102 local x f fset
103 declare -a new_CFLAGS new_CXXFLAGS
32 104
33 for x in $1 105 for x in "$@" ; do
106 case "${x}" in
107 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
108 -fstack-protector|-fstack-protector-all) fstack-flags;;
109 esac
34 do 110 done
35 export CFLAGS="${CFLAGS/${x}}" 111
36 export CXXFLAGS="${CXXFLAGS/${x}}" 112 for fset in CFLAGS CXXFLAGS; do
113 # Looping over the flags instead of using a global
114 # substitution ensures that we're working with flag atoms.
115 # Otherwise globs like -O* have the potential to wipe out the
116 # list of flags.
117 for f in ${!fset}; do
118 for x in "$@"; do
119 # Note this should work with globs like -O*
120 [[ ${f} == ${x} ]] && continue 2
121 done
122 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
37 done 123 done
124 eval export ${fset}=\${new_${fset}\[*]}
125 done
38 126
127 return 0
39} 128}
40 129
130filter-lfs-flags() {
131 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
132}
133
134append-lfs-flags() {
135 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136}
137
41append-flags () { 138append-flags() {
42
43 CFLAGS="${CFLAGS} $1" 139 export CFLAGS="${CFLAGS} $*"
44 CXXFLAGS="${CXXFLAGS} $1" 140 export CXXFLAGS="${CXXFLAGS} $*"
45 141 [ -n "`is-flag -fno-stack-protector`" -o \
142 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
143 return 0
46} 144}
47 145
48replace-flags () { 146replace-flags() {
147 local f fset
148 declare -a new_CFLAGS new_CXXFLAGS
49 149
50 CFLAGS="${CFLAGS/${1}/${2} }" 150 for fset in CFLAGS CXXFLAGS; do
51 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 151 # Looping over the flags instead of using a global
152 # substitution ensures that we're working with flag atoms.
153 # Otherwise globs like -O* have the potential to wipe out the
154 # list of flags.
155 for f in ${!fset}; do
156 # Note this should work with globs like -O*
157 [[ ${f} == ${1} ]] && f=${2}
158 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
159 done
160 eval export ${fset}=\${new_${fset}\[*]}
161 done
52 162
163 return 0
164}
165
166replace-cpu-flags() {
167 local newcpu="$#" ; newcpu="${!newcpu}"
168 while [ $# -gt 1 ] ; do
169 # quote to make sure that no globbing is done (particularly on
170 # ${oldcpu} prior to calling replace-flags
171 replace-flags "-march=${1}" "-march=${newcpu}"
172 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
173 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
174 shift
175 done
176 return 0
53} 177}
54 178
55is-flag() { 179is-flag() {
180 local x
56 181
57 for x in ${CFLAGS} ${CXXFLAGS} 182 for x in ${CFLAGS} ${CXXFLAGS} ; do
58 do 183 # Note this should work with globs like -mcpu=ultrasparc*
59 if [ "${x}" = "$1" ] 184 if [[ ${x} == ${1} ]]; then
60 then
61 echo true 185 echo true
62 break 186 return 0
63 fi 187 fi
64 done 188 done
189 return 1
190}
65 191
192filter-mfpmath() {
193 local orig_mfpmath new_math prune_math
194
195 # save the original -mfpmath flag
196 orig_mfpmath="`get-flag -mfpmath`"
197 # get the value of the current -mfpmath flag
198 new_math=" `get-flag mfpmath | tr , ' '` "
199 # figure out which math values are to be removed
200 prune_math=""
201 for prune_math in "$@" ; do
202 new_math="${new_math/ ${prune_math} / }"
203 done
204 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
205
206 if [ -z "${new_math}" ] ; then
207 # if we're removing all user specified math values are
208 # slated for removal, then we just filter the flag
209 filter-flags ${orig_mfpmath}
210 else
211 # if we only want to filter some of the user specified
212 # math values, then we replace the current flag
213 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
214 fi
215 return 0
66} 216}
67 217
68strip-flags() { 218strip-flags() {
219 local x y flag NEW_CFLAGS NEW_CXXFLAGS
220
221 setup-allowed-flags
69 222
70 local NEW_CFLAGS="" 223 local NEW_CFLAGS=""
71 local NEW_CXXFLAGS="" 224 local NEW_CXXFLAGS=""
72 225
73 local ALLOWED_FLAGS="-O -mcpu -march -pipe -g" 226 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
227 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
228 use debug && einfo "Enabling the use of some unstable flags"
229 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
230 fi
74 231
75 set -f 232 set -f # disable pathname expansion
76 233
77 for x in ${CFLAGS} 234 for x in ${CFLAGS}; do
78 do
79 for y in ${ALLOWED_FLAGS} 235 for y in ${ALLOWED_FLAGS}; do
80 do 236 flag=${x%%=*}
81 if [ "${x/${y}}" != "${x}" ] 237 if [ "${flag%%${y}}" = "" ] ; then
82 then
83 if [ -z "${NEW_CFLAGS}" ]
84 then
85 NEW_CFLAGS="${x}"
86 else
87 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 238 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
88 fi 239 break
89 fi 240 fi
90 done 241 done
91 done 242 done
92 243
93 for x in ${CXXFLAGS} 244 for x in ${CXXFLAGS}; do
94 do
95 for y in ${ALLOWED_FLAGS} 245 for y in ${ALLOWED_FLAGS}; do
96 do 246 flag=${x%%=*}
97 if [ "${x/${y}}" != "${x}" ] 247 if [ "${flag%%${y}}" = "" ] ; then
98 then
99 if [ -z "${NEW_CXXFLAGS}" ]
100 then
101 NEW_CXXFLAGS="${x}"
102 else
103 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 248 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
104 fi 249 break
105 fi 250 fi
106 done 251 done
107 done 252 done
108 253
109 set +f 254 # In case we filtered out all optimization flags fallback to -O2
255 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
256 NEW_CFLAGS="${NEW_CFLAGS} -O2"
257 fi
258 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
259 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
260 fi
261
262 set +f # re-enable pathname expansion
110 263
111 export CFLAGS="${NEW_CFLAGS}" 264 export CFLAGS="${NEW_CFLAGS}"
112 export CXXFLAGS="${NEW_CXXFLAGS}" 265 export CXXFLAGS="${NEW_CXXFLAGS}"
266 return 0
267}
268
269test_flag() {
270 local cc=${CC:-gcc} ; cc=${cc%% *}
271 if ${cc} -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
272 printf "%s\n" "$*"
273 return 0
274 fi
275 return 1
276}
277
278test_version_info() {
279 local cc=${CC:-gcc} ; cc=${cc%% *}
280 if [[ $(${cc} --version 2>&1) == *$1* ]]; then
281 return 0
282 else
283 return 1
284 fi
285}
286
287strip-unsupported-flags() {
288 local NEW_CFLAGS NEW_CXXFLAGS
289
290 for x in ${CFLAGS} ; do
291 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
292 done
293 for x in ${CXXFLAGS} ; do
294 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
295 done
296
297 export CFLAGS="${NEW_CFLAGS}"
298 export CXXFLAGS="${NEW_CXXFLAGS}"
113} 299}
114 300
115get-flag() { 301get-flag() {
116 local findflag="$1" 302 local f findflag="$1"
117 303
304 # this code looks a little flaky but seems to work for
305 # everything we want ...
306 # for example, if CFLAGS="-march=i686":
307 # `get-flag -march` == "-march=i686"
308 # `get-flag march` == "i686"
118 for f in ${CFLAGS} ${CXXFLAGS} ; do 309 for f in ${CFLAGS} ${CXXFLAGS} ; do
119 if [ "${f/${findflag}}" != "${f}" ] ; then 310 if [ "${f/${findflag}}" != "${f}" ] ; then
120 echo "${f/-${findflag}=}" 311 printf "%s\n" "${f/-${findflag}=}"
121 return 312 return 0
122 fi 313 fi
123 done 314 done
315 return 1
124} 316}
317
318has_hardened() {
319 test_version_info Hardened && return 0
320 # the specs file wont exist unless gcc has GCC_SPECS support
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
322 return 0
323 return 1
324}
325
326has_pic() {
327 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
328 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
329 test_version_info pie && return 0
330 return 1
331}
332
333has_pie() {
334 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
335 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
336 test_version_info pie && return 0
337 return 1
338}
339
340has_ssp() {
341 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
342 test_version_info ssp && return 0
343 return 1
344}
345
346has_m64() {
347 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future
350 # clean-up!
351 local temp="$(emktemp)"
352 echo "int main() { return(0); }" > ${temp}.c
353 ${CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
354 local ret=$?
355 rm -f ${temp}.c
356 [ "$ret" != "1" ] && return 0
357 return 1
358}
359
360has_m32() {
361 # this doesnt test if the flag is accepted, it tests if the flag
362 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
363 # please dont replace this function with test_flag in some future
364 # clean-up!
365 local temp="$(emktemp)"
366 echo "int main() { return(0); }" > ${temp}.c
367 ${CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
368 local ret=$?
369 rm -f ${temp}.c
370 [ "$ret" != "1" ] && return 0
371 return 1
372}
373
374replace-sparc64-flags() {
375 local SPARC64_CPUS="ultrasparc v9"
376
377 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
378 for x in ${SPARC64_CPUS}; do
379 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
380 done
381 else
382 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
384 done
385 fi
386
387 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
388 for x in ${SPARC64_CPUS}; do
389 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
390 done
391 else
392 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
394 done
395 fi
396
397 export CFLAGS CXXFLAGS
398}
399
400append-ldflags() {
401 export LDFLAGS="${LDFLAGS} $*"
402 return 0
403}
404
405filter-ldflags() {
406 local x
407
408 # we do this fancy spacing stuff so as to not filter
409 # out part of a flag ... we want flag atoms ! :D
410 LDFLAGS=" ${LDFLAGS} "
411 for x in "$@" ; do
412 LDFLAGS="${LDFLAGS// ${x} / }"
413 done
414 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
415 export LDFLAGS
416 return 0
417}
418
419etexec-flags() {
420 # if you're not using a hardened compiler you wont need this
421 # PIC/no-pic kludge in the first place.
422 has_hardened || return 0
423 # this kludge breaks on amd64, and probably other -fPIC dependant
424 # archs.
425 use amd64 && return 0
426
427 if has_pie || has_pic; then
428 [ -z "`is-flag -fno-pic`" ] &&
429 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
430 [ -z "`is-flag -nopie`" ] &&
431 export CFLAGS="${CFLAGS} `test_flag -nopie`"
432 fi
433 return 0
434}
435
436fstack-flags() {
437 if has_ssp; then
438 [ -z "`is-flag -fno-stack-protector`" ] &&
439 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
440 fi
441 return 0
442}
443
444# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
445# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
446# fixes.
447#
448# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
449gcc2-flags() {
450 CFLAGS=${CFLAGS//pentium-mmx/i586}
451 CFLAGS=${CFLAGS//pentium[234]/i686}
452 CFLAGS=${CFLAGS//k6-[23]/k6}
453 CFLAGS=${CFLAGS//athlon-tbird/i686}
454 CFLAGS=${CFLAGS//athlon-4/i686}
455 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
456 CFLAGS=${CFLAGS//athlon/i686}
457
458 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
459 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
460 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
461 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
462 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
463 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
464 CXXFLAGS=${CXXFLAGS//athlon/i686}
465
466 if [ "$ARCH" = alpha ]; then
467 CHOST=${CHOST/#alphaev6[78]/alphaev6}
468 CFLAGS=${CFLAGS//ev6[78]/ev6}
469 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
470 fi
471
472 export CFLAGS CXXFLAGS
473}

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