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Revision 1.75 - (show annotations) (download)
Thu Oct 28 01:38:31 2004 UTC (9 years, 5 months ago) by vapier
Branch: MAIN
Changes since 1.74: +4 -8 lines
use $(tc-getCC)

1 # Copyright 1999-2004 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.74 2004/10/21 07:40:47 kugelfang Exp $
4 #
5 # Author Bart Verwilst <verwilst@gentoo.org>
6
7 ECLASS=flag-o-matic
8 INHERITED="$INHERITED $ECLASS"
9
10 IUSE="debug"
11
12 # need access to emktemp()
13 inherit eutils toolchain-funcs
14
15 #
16 #### filter-flags <flags> ####
17 # Remove particular flags from C[XX]FLAGS
18 # Matches only complete flags
19 #
20 #### append-flags <flags> ####
21 # Add extra flags to your current C[XX]FLAGS
22 #
23 #### replace-flags <orig.flag> <new.flag> ###
24 # Replace a flag by another one
25 #
26 #### replace-cpu-flags <old.cpus> <new.cpu> ###
27 # Replace march/mcpu flags that specify <old.cpus>
28 # with flags that specify <new.cpu>
29 #
30 #### is-flag <flag> ####
31 # Returns "true" if flag is set in C[XX]FLAGS
32 # Matches only complete a flag
33 #
34 #### strip-flags ####
35 # Strip C[XX]FLAGS of everything except known
36 # good options.
37 #
38 #### strip-unsupported-flags ####
39 # Strip C[XX]FLAGS of any flags not supported by
40 # installed version of gcc
41 #
42 #### get-flag <flag> ####
43 # Find and echo the value for a particular flag
44 #
45 #### replace-sparc64-flags ####
46 # Sets mcpu to v8 and uses the original value
47 # as mtune if none specified.
48 #
49 #### filter-mfpmath <math types> ####
50 # Remove specified math types from the fpmath specification
51 # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52 # will leave the user with -mfpmath=386
53 #
54 #### append-ldflags ####
55 # Add extra flags to your current LDFLAGS
56 #
57 #### filter-ldflags <flags> ####
58 # Remove particular flags from LDFLAGS
59 # Matches only complete flags
60 #
61 #### etexec-flags ####
62 # hooked function for hardened gcc that appends
63 # -fno-pic to {C,CXX,LD}FLAGS
64 # when a package is filtering -fpic, -fPIC, -fpie, -fPIE
65 #
66 #### fstack-flags ####
67 # hooked function for hardened gcc that appends
68 # -fno-stack-protector to {C,CXX,LD}FLAGS
69 # when a package is filtering -fstack-protector, -fstack-protector-all
70 # notice: modern automatic specs files will also suppress -fstack-protector-all
71 # when only -fno-stack-protector is given
72 #
73
74 # C[XX]FLAGS that we allow in strip-flags
75 setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then
77 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g"
78 case "${ARCH}" in
79 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
80 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
81 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
82 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
84 esac
85 fi
86 # allow a bunch of flags that negate features / control ABI
87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
88 case "${ARCH}" in
89 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
90 esac
91 ALLOWED_FLAGS="${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"
92
93 # C[XX]FLAGS that we are think is ok, but needs testing
94 # NOTE: currently -Os have issues with gcc3 and K6* arch's
95 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
96 return 0
97 }
98
99 filter-flags() {
100 local x f fset
101 declare -a new_CFLAGS new_CXXFLAGS
102
103 for x in "$@" ; do
104 case "${x}" in
105 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
106 -fstack-protector|-fstack-protector-all) fstack-flags;;
107 esac
108 done
109
110 for fset in CFLAGS CXXFLAGS; do
111 # Looping over the flags instead of using a global
112 # substitution ensures that we're working with flag atoms.
113 # Otherwise globs like -O* have the potential to wipe out the
114 # list of flags.
115 for f in ${!fset}; do
116 for x in "$@"; do
117 # Note this should work with globs like -O*
118 [[ ${f} == ${x} ]] && continue 2
119 done
120 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
121 done
122 eval export ${fset}=\${new_${fset}\[*]}
123 done
124
125 return 0
126 }
127
128 filter-lfs-flags() {
129 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
130 }
131
132 append-lfs-flags() {
133 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
134 }
135
136 append-flags() {
137 export CFLAGS="${CFLAGS} $*"
138 export CXXFLAGS="${CXXFLAGS} $*"
139 [ -n "`is-flag -fno-stack-protector`" -o \
140 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
141 return 0
142 }
143
144 replace-flags() {
145 local f fset
146 declare -a new_CFLAGS new_CXXFLAGS
147
148 for fset in CFLAGS CXXFLAGS; do
149 # Looping over the flags instead of using a global
150 # substitution ensures that we're working with flag atoms.
151 # Otherwise globs like -O* have the potential to wipe out the
152 # list of flags.
153 for f in ${!fset}; do
154 # Note this should work with globs like -O*
155 [[ ${f} == ${1} ]] && f=${2}
156 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
157 done
158 eval export ${fset}=\${new_${fset}\[*]}
159 done
160
161 return 0
162 }
163
164 replace-cpu-flags() {
165 local newcpu="$#" ; newcpu="${!newcpu}"
166 while [ $# -gt 1 ] ; do
167 # quote to make sure that no globbing is done (particularly on
168 # ${oldcpu} prior to calling replace-flags
169 replace-flags "-march=${1}" "-march=${newcpu}"
170 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
171 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
172 shift
173 done
174 return 0
175 }
176
177 is-flag() {
178 local x
179
180 for x in ${CFLAGS} ${CXXFLAGS} ; do
181 # Note this should work with globs like -mcpu=ultrasparc*
182 if [[ ${x} == ${1} ]]; then
183 echo true
184 return 0
185 fi
186 done
187 return 1
188 }
189
190 filter-mfpmath() {
191 local orig_mfpmath new_math prune_math
192
193 # save the original -mfpmath flag
194 orig_mfpmath="`get-flag -mfpmath`"
195 # get the value of the current -mfpmath flag
196 new_math=" `get-flag mfpmath | tr , ' '` "
197 # figure out which math values are to be removed
198 prune_math=""
199 for prune_math in "$@" ; do
200 new_math="${new_math/ ${prune_math} / }"
201 done
202 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
203
204 if [ -z "${new_math}" ] ; then
205 # if we're removing all user specified math values are
206 # slated for removal, then we just filter the flag
207 filter-flags ${orig_mfpmath}
208 else
209 # if we only want to filter some of the user specified
210 # math values, then we replace the current flag
211 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
212 fi
213 return 0
214 }
215
216 strip-flags() {
217 local x y flag NEW_CFLAGS NEW_CXXFLAGS
218
219 setup-allowed-flags
220
221 local NEW_CFLAGS=""
222 local NEW_CXXFLAGS=""
223
224 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
225 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
226 use debug && einfo "Enabling the use of some unstable flags"
227 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
228 fi
229
230 set -f # disable pathname expansion
231
232 for x in ${CFLAGS}; do
233 for y in ${ALLOWED_FLAGS}; do
234 flag=${x%%=*}
235 if [ "${flag%%${y}}" = "" ] ; then
236 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
237 break
238 fi
239 done
240 done
241
242 for x in ${CXXFLAGS}; do
243 for y in ${ALLOWED_FLAGS}; do
244 flag=${x%%=*}
245 if [ "${flag%%${y}}" = "" ] ; then
246 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
247 break
248 fi
249 done
250 done
251
252 # In case we filtered out all optimization flags fallback to -O2
253 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
254 NEW_CFLAGS="${NEW_CFLAGS} -O2"
255 fi
256 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
257 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
258 fi
259
260 set +f # re-enable pathname expansion
261
262 export CFLAGS="${NEW_CFLAGS}"
263 export CXXFLAGS="${NEW_CXXFLAGS}"
264 return 0
265 }
266
267 test_flag() {
268 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
269 printf "%s\n" "$*"
270 return 0
271 fi
272 return 1
273 }
274
275 test_version_info() {
276 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
277 return 0
278 else
279 return 1
280 fi
281 }
282
283 strip-unsupported-flags() {
284 local NEW_CFLAGS NEW_CXXFLAGS
285
286 for x in ${CFLAGS} ; do
287 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
288 done
289 for x in ${CXXFLAGS} ; do
290 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
291 done
292
293 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}"
295 }
296
297 get-flag() {
298 local f findflag="$1"
299
300 # this code looks a little flaky but seems to work for
301 # everything we want ...
302 # for example, if CFLAGS="-march=i686":
303 # `get-flag -march` == "-march=i686"
304 # `get-flag march` == "i686"
305 for f in ${CFLAGS} ${CXXFLAGS} ; do
306 if [ "${f/${findflag}}" != "${f}" ] ; then
307 printf "%s\n" "${f/-${findflag}=}"
308 return 0
309 fi
310 done
311 return 1
312 }
313
314 has_hardened() {
315 test_version_info Hardened && return 0
316 # the specs file wont exist unless gcc has GCC_SPECS support
317 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
318 return 0
319 return 1
320 }
321
322 has_pic() {
323 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
324 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
325 test_version_info pie && return 0
326 return 1
327 }
328
329 has_pie() {
330 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
331 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
332 test_version_info pie && return 0
333 return 1
334 }
335
336 has_ssp() {
337 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
338 test_version_info ssp && return 0
339 return 1
340 }
341
342 has_m64() {
343 # this doesnt test if the flag is accepted, it tests if the flag
344 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
345 # please dont replace this function with test_flag in some future
346 # clean-up!
347 local temp="$(emktemp)"
348 echo "int main() { return(0); }" > ${temp}.c
349 MY_CC=$(tc-getCC)
350 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
351 local ret=$?
352 rm -f ${temp}.c
353 [ "$ret" != "1" ] && return 0
354 return 1
355 }
356
357 has_m32() {
358 # this doesnt test if the flag is accepted, it tests if the flag
359 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
360 # please dont replace this function with test_flag in some future
361 # clean-up!
362 local temp="$(emktemp)"
363 echo "int main() { return(0); }" > ${temp}.c
364 MY_CC=$(tc-getCC)
365 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
366 local ret=$?
367 rm -f ${temp}.c
368 [ "$ret" != "1" ] && return 0
369 return 1
370 }
371
372 replace-sparc64-flags() {
373 local SPARC64_CPUS="ultrasparc v9"
374
375 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
376 for x in ${SPARC64_CPUS}; do
377 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
378 done
379 else
380 for x in ${SPARC64_CPUS}; do
381 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
382 done
383 fi
384
385 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
386 for x in ${SPARC64_CPUS}; do
387 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
388 done
389 else
390 for x in ${SPARC64_CPUS}; do
391 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
392 done
393 fi
394
395 export CFLAGS CXXFLAGS
396 }
397
398 append-ldflags() {
399 export LDFLAGS="${LDFLAGS} $*"
400 return 0
401 }
402
403 filter-ldflags() {
404 local x
405
406 # we do this fancy spacing stuff so as to not filter
407 # out part of a flag ... we want flag atoms ! :D
408 LDFLAGS=" ${LDFLAGS} "
409 for x in "$@" ; do
410 LDFLAGS="${LDFLAGS// ${x} / }"
411 done
412 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
413 export LDFLAGS
414 return 0
415 }
416
417 etexec-flags() {
418 # if you're not using a hardened compiler you wont need this
419 # PIC/no-pic kludge in the first place.
420 has_hardened || return 0
421 # this kludge breaks on amd64, and probably other -fPIC dependant
422 # archs.
423 use amd64 && return 0
424
425 if has_pie || has_pic; then
426 [ -z "`is-flag -fno-pic`" ] &&
427 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
428 [ -z "`is-flag -nopie`" ] &&
429 export CFLAGS="${CFLAGS} `test_flag -nopie`"
430 fi
431 return 0
432 }
433
434 fstack-flags() {
435 if has_ssp; then
436 [ -z "`is-flag -fno-stack-protector`" ] &&
437 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
438 fi
439 return 0
440 }
441
442 # This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
443 # bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
444 # fixes.
445 #
446 # Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
447 gcc2-flags() {
448 CFLAGS=${CFLAGS//pentium-mmx/i586}
449 CFLAGS=${CFLAGS//pentium[234]/i686}
450 CFLAGS=${CFLAGS//k6-[23]/k6}
451 CFLAGS=${CFLAGS//athlon-tbird/i686}
452 CFLAGS=${CFLAGS//athlon-4/i686}
453 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
454 CFLAGS=${CFLAGS//athlon/i686}
455
456 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
457 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
458 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
459 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
460 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
461 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
462 CXXFLAGS=${CXXFLAGS//athlon/i686}
463
464 if [ "$ARCH" = alpha ]; then
465 CHOST=${CHOST/#alphaev6[78]/alphaev6}
466 CFLAGS=${CFLAGS//ev6[78]/ev6}
467 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
468 fi
469
470 export CFLAGS CXXFLAGS
471 }

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