/[gentoo-x86]/eclass/flag-o-matic.eclass
Gentoo

Contents of /eclass/flag-o-matic.eclass

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.78 - (show annotations) (download)
Wed Dec 22 21:18:35 2004 UTC (9 years, 8 months ago) by eradicator
Branch: MAIN
Changes since 1.77: +2 -1 lines
Added -m{32,64} to allowed flags on sparc.

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 1.77 2004/11/13 07:07:08 solar 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="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
82 case "${ARCH}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
89 esac
90 fi
91 # allow a bunch of flags that negate features / control ABI
92 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
93 case "${ARCH}" in
94 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
95 esac
96 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
97
98 # C[XX]FLAGS that we are think is ok, but needs testing
99 # NOTE: currently -Os have issues with gcc3 and K6* arch's
100 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
101 return 0
102 }
103
104 filter-flags() {
105 local x f fset
106 declare -a new_CFLAGS new_CXXFLAGS
107
108 for x in "$@" ; do
109 case "${x}" in
110 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
111 -fstack-protector|-fstack-protector-all) fstack-flags;;
112 esac
113 done
114
115 for fset in CFLAGS CXXFLAGS; do
116 # Looping over the flags instead of using a global
117 # substitution ensures that we're working with flag atoms.
118 # Otherwise globs like -O* have the potential to wipe out the
119 # list of flags.
120 for f in ${!fset}; do
121 for x in "$@"; do
122 # Note this should work with globs like -O*
123 [[ ${f} == ${x} ]] && continue 2
124 done
125 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
126 done
127 eval export ${fset}=\${new_${fset}\[*]}
128 done
129
130 return 0
131 }
132
133 filter-lfs-flags() {
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135 }
136
137 append-lfs-flags() {
138 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
139 }
140
141 append-flags() {
142 export CFLAGS="${CFLAGS} $*"
143 export CXXFLAGS="${CXXFLAGS} $*"
144 [ -n "`is-flag -fno-stack-protector`" -o \
145 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
146 return 0
147 }
148
149 replace-flags() {
150 local f fset
151 declare -a new_CFLAGS new_CXXFLAGS
152
153 for fset in CFLAGS CXXFLAGS; do
154 # Looping over the flags instead of using a global
155 # substitution ensures that we're working with flag atoms.
156 # Otherwise globs like -O* have the potential to wipe out the
157 # list of flags.
158 for f in ${!fset}; do
159 # Note this should work with globs like -O*
160 [[ ${f} == ${1} ]] && f=${2}
161 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
162 done
163 eval export ${fset}=\${new_${fset}\[*]}
164 done
165
166 return 0
167 }
168
169 replace-cpu-flags() {
170 local newcpu="$#" ; newcpu="${!newcpu}"
171 while [ $# -gt 1 ] ; do
172 # quote to make sure that no globbing is done (particularly on
173 # ${oldcpu} prior to calling replace-flags
174 replace-flags "-march=${1}" "-march=${newcpu}"
175 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
176 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
177 shift
178 done
179 return 0
180 }
181
182 is-flag() {
183 local x
184
185 for x in ${CFLAGS} ${CXXFLAGS} ; do
186 # Note this should work with globs like -mcpu=ultrasparc*
187 if [[ ${x} == ${1} ]]; then
188 echo true
189 return 0
190 fi
191 done
192 return 1
193 }
194
195 filter-mfpmath() {
196 local orig_mfpmath new_math prune_math
197
198 # save the original -mfpmath flag
199 orig_mfpmath="`get-flag -mfpmath`"
200 # get the value of the current -mfpmath flag
201 new_math=" `get-flag mfpmath | tr , ' '` "
202 # figure out which math values are to be removed
203 prune_math=""
204 for prune_math in "$@" ; do
205 new_math="${new_math/ ${prune_math} / }"
206 done
207 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
208
209 if [ -z "${new_math}" ] ; then
210 # if we're removing all user specified math values are
211 # slated for removal, then we just filter the flag
212 filter-flags ${orig_mfpmath}
213 else
214 # if we only want to filter some of the user specified
215 # math values, then we replace the current flag
216 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
217 fi
218 return 0
219 }
220
221 strip-flags() {
222 local x y flag NEW_CFLAGS NEW_CXXFLAGS
223
224 setup-allowed-flags
225
226 local NEW_CFLAGS=""
227 local NEW_CXXFLAGS=""
228
229 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
230 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
231 use debug && einfo "Enabling the use of some unstable flags"
232 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
233 fi
234
235 set -f # disable pathname expansion
236
237 for x in ${CFLAGS}; do
238 for y in ${ALLOWED_FLAGS}; do
239 flag=${x%%=*}
240 if [ "${flag%%${y}}" = "" ] ; then
241 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
242 break
243 fi
244 done
245 done
246
247 for x in ${CXXFLAGS}; do
248 for y in ${ALLOWED_FLAGS}; do
249 flag=${x%%=*}
250 if [ "${flag%%${y}}" = "" ] ; then
251 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
252 break
253 fi
254 done
255 done
256
257 # In case we filtered out all optimization flags fallback to -O2
258 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
259 NEW_CFLAGS="${NEW_CFLAGS} -O2"
260 fi
261 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
262 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
263 fi
264
265 set +f # re-enable pathname expansion
266
267 export CFLAGS="${NEW_CFLAGS}"
268 export CXXFLAGS="${NEW_CXXFLAGS}"
269 return 0
270 }
271
272 test_flag() {
273 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
274 printf "%s\n" "$*"
275 return 0
276 fi
277 return 1
278 }
279
280 test_version_info() {
281 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
282 return 0
283 else
284 return 1
285 fi
286 }
287
288 strip-unsupported-flags() {
289 local NEW_CFLAGS NEW_CXXFLAGS
290
291 for x in ${CFLAGS} ; do
292 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
293 done
294 for x in ${CXXFLAGS} ; do
295 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
296 done
297
298 export CFLAGS="${NEW_CFLAGS}"
299 export CXXFLAGS="${NEW_CXXFLAGS}"
300 }
301
302 get-flag() {
303 local f findflag="$1"
304
305 # this code looks a little flaky but seems to work for
306 # everything we want ...
307 # for example, if CFLAGS="-march=i686":
308 # `get-flag -march` == "-march=i686"
309 # `get-flag march` == "i686"
310 for f in ${CFLAGS} ${CXXFLAGS} ; do
311 if [ "${f/${findflag}}" != "${f}" ] ; then
312 printf "%s\n" "${f/-${findflag}=}"
313 return 0
314 fi
315 done
316 return 1
317 }
318
319 has_hardened() {
320 test_version_info Hardened && return 0
321 # the specs file wont exist unless gcc has GCC_SPECS support
322 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
323 return 0
324 return 1
325 }
326
327 has_pic() {
328 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
329 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
330 test_version_info pie && return 0
331 return 1
332 }
333
334 has_pie() {
335 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
336 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
337 test_version_info pie && return 0
338 return 1
339 }
340
341 has_ssp() {
342 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
343 test_version_info ssp && return 0
344 return 1
345 }
346
347 has_m64() {
348 # this doesnt test if the flag is accepted, it tests if the flag
349 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
350 # please dont replace this function with test_flag in some future
351 # clean-up!
352 local temp="$(emktemp)"
353 echo "int main() { return(0); }" > ${temp}.c
354 MY_CC=$(tc-getCC)
355 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
356 local ret=$?
357 rm -f ${temp}.c
358 [ "$ret" != "1" ] && return 0
359 return 1
360 }
361
362 has_m32() {
363 # this doesnt test if the flag is accepted, it tests if the flag
364 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
365 # please dont replace this function with test_flag in some future
366 # clean-up!
367 local temp="$(emktemp)"
368 echo "int main() { return(0); }" > ${temp}.c
369 MY_CC=$(tc-getCC)
370 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
371 local ret=$?
372 rm -f ${temp}.c
373 [ "$ret" != "1" ] && return 0
374 return 1
375 }
376
377 replace-sparc64-flags() {
378 local SPARC64_CPUS="ultrasparc v9"
379
380 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
381 for x in ${SPARC64_CPUS}; do
382 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
383 done
384 else
385 for x in ${SPARC64_CPUS}; do
386 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
387 done
388 fi
389
390 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
391 for x in ${SPARC64_CPUS}; do
392 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
393 done
394 else
395 for x in ${SPARC64_CPUS}; do
396 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
397 done
398 fi
399
400 export CFLAGS CXXFLAGS
401 }
402
403 append-ldflags() {
404 export LDFLAGS="${LDFLAGS} $*"
405 return 0
406 }
407
408 filter-ldflags() {
409 local x
410
411 # we do this fancy spacing stuff so as to not filter
412 # out part of a flag ... we want flag atoms ! :D
413 LDFLAGS=" ${LDFLAGS} "
414 for x in "$@" ; do
415 LDFLAGS="${LDFLAGS// ${x} / }"
416 done
417 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
418 export LDFLAGS
419 return 0
420 }
421
422 etexec-flags() {
423 # if you're not using a hardened compiler you wont need this
424 # PIC/no-pic kludge in the first place.
425 has_hardened || return 0
426 use amd64 && return 0
427 use mips && return 0
428
429 if has_pie || has_pic; then
430 [ -z "`is-flag -fno-pic`" ] &&
431 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
432 [ -z "`is-flag -nopie`" ] &&
433 export CFLAGS="${CFLAGS} `test_flag -nopie`"
434 fi
435 return 0
436 }
437
438 fstack-flags() {
439 if has_ssp; then
440 [ -z "`is-flag -fno-stack-protector`" ] &&
441 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
442 fi
443 return 0
444 }
445
446 # This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
447 # bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
448 # fixes.
449 #
450 # Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
451 gcc2-flags() {
452 CFLAGS=${CFLAGS//pentium-mmx/i586}
453 CFLAGS=${CFLAGS//pentium[234]/i686}
454 CFLAGS=${CFLAGS//k6-[23]/k6}
455 CFLAGS=${CFLAGS//athlon-tbird/i686}
456 CFLAGS=${CFLAGS//athlon-4/i686}
457 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
458 CFLAGS=${CFLAGS//athlon/i686}
459
460 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
461 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
462 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
463 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
464 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
465 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
466 CXXFLAGS=${CXXFLAGS//athlon/i686}
467
468 if [ "$ARCH" = alpha ]; then
469 CHOST=${CHOST/#alphaev6[78]/alphaev6}
470 CFLAGS=${CFLAGS//ev6[78]/ev6}
471 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
472 fi
473
474 export CFLAGS CXXFLAGS
475 }

  ViewVC Help
Powered by ViewVC 1.1.20