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

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

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.64 - (show annotations) (download)
Thu Jul 22 15:29:10 2004 UTC (10 years, 1 month ago) by agriffis
Branch: MAIN
Changes since 1.63: +29 -14 lines
update replace-flags to use atom code from filter-flags, related to #42006.  Also add ${IUSE} to IUSE for the sake of portage .50 users, which is basically all of them at the moment

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 1.63 2004/07/18 04:59:30 vapier Exp $
4 #
5 # Author Bart Verwilst <verwilst@gentoo.org>
6
7 ECLASS=flag-o-matic
8 INHERITED="$INHERITED $ECLASS"
9
10 # Please leave ${IUSE} in this until portage .51 is stable, otherwise
11 # IUSE gets clobbered.
12 IUSE="${IUSE} debug"
13
14 #
15 #### filter-flags <flags> ####
16 # Remove particular flags from C[XX]FLAGS
17 # Matches only complete flags
18 #
19 #### append-flags <flags> ####
20 # Add extra flags to your current C[XX]FLAGS
21 #
22 #### replace-flags <orig.flag> <new.flag> ###
23 # Replace a flag by another one
24 #
25 #### replace-cpu-flags <new.cpu> <old.cpus> ###
26 # Replace march/mcpu flags that specify <old.cpus>
27 # with flags that specify <new.cpu>
28 #
29 #### is-flag <flag> ####
30 # Returns "true" if flag is set in C[XX]FLAGS
31 # Matches only complete a flag
32 #
33 #### strip-flags ####
34 # Strip C[XX]FLAGS of everything except known
35 # good options.
36 #
37 #### strip-unsupported-flags ####
38 # Strip C[XX]FLAGS of any flags not supported by
39 # installed version of gcc
40 #
41 #### get-flag <flag> ####
42 # Find and echo the value for a particular flag
43 #
44 #### replace-sparc64-flags ####
45 # Sets mcpu to v8 and uses the original value
46 # as mtune if none specified.
47 #
48 #### filter-mfpmath <math types> ####
49 # Remove specified math types from the fpmath specification
50 # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
51 # will leave the user with -mfpmath=386
52 #
53 #### append-ldflags ####
54 # Add extra flags to your current LDFLAGS
55 #
56 #### filter-ldflags <flags> ####
57 # Remove particular flags from LDFLAGS
58 # Matches only complete flags
59 #
60 #### etexec-flags ####
61 # hooked function for hardened gcc that appends
62 # -fno-pic to {C,CXX,LD}FLAGS
63 # when a package is filtering -fpic, -fPIC, -fpie, -fPIE
64 #
65 #### fstack-flags ####
66 # hooked function for hardened gcc that appends
67 # -fno-stack-protector to {C,CXX,LD}FLAGS
68 # when a package is filtering -fstack-protector, -fstack-protector-all
69 # notice: modern automatic specs files will also suppress -fstack-protector-all
70 # when only -fno-stack-protector is given
71 #
72
73 # C[XX]FLAGS that we allow in strip-flags
74 setup-allowed-flags() {
75 if [ -z "${ALLOWED_FLAGS}" ] ; then
76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
77 case "${ARCH}" in
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83 esac
84 fi
85
86 # C[XX]FLAGS that we are think is ok, but needs testing
87 # NOTE: currently -Os have issues with gcc3 and K6* arch's
88 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
89 return 0
90 }
91
92 filter-flags() {
93 local x f fset
94 declare -a new_CFLAGS new_CXXFLAGS
95
96 for x in "$@" ; do
97 case "${x}" in
98 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
99 -fstack-protector|-fstack-protector-all) fstack-flags;;
100 esac
101 done
102
103 for fset in CFLAGS CXXFLAGS; do
104 # Looping over the flags instead of using a global
105 # substitution ensures that we're working with flag atoms.
106 # Otherwise globs like -O* have the potential to wipe out the
107 # list of flags.
108 for f in ${!fset}; do
109 for x in "$@"; do
110 # Note this should work with globs like -O*
111 [[ ${f} == ${x} ]] && continue 2
112 done
113 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
114 done
115 eval export ${fset}=\${new_${fset}\[*]}
116 done
117
118 return 0
119 }
120
121 filter-lfs-flags() {
122 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
123 }
124
125 append-lfs-flags() {
126 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127 }
128
129 append-flags() {
130 export CFLAGS="${CFLAGS} $*"
131 export CXXFLAGS="${CXXFLAGS} $*"
132 [ -n "`is-flag -fno-stack-protector`" -o \
133 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
134 return 0
135 }
136
137 replace-flags() {
138 local f fset
139 declare -a new_CFLAGS new_CXXFLAGS
140
141 for fset in CFLAGS CXXFLAGS; do
142 # Looping over the flags instead of using a global
143 # substitution ensures that we're working with flag atoms.
144 # Otherwise globs like -O* have the potential to wipe out the
145 # list of flags.
146 for f in ${!fset}; do
147 # Note this should work with globs like -O*
148 [[ ${f} == ${1} ]] && f=${2}
149 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
150 done
151 eval export ${fset}=\${new_${fset}\[*]}
152 done
153
154 return 0
155 }
156
157 replace-cpu-flags() {
158 local oldcpu newcpu="$1" ; shift
159 for oldcpu in "$@" ; do
160 # quote to make sure that no globbing is done (particularly on
161 # ${oldcpu} prior to calling replace-flags
162 replace-flags "-march=${oldcpu}" "-march=${newcpu}"
163 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}"
164 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}"
165 done
166 return 0
167 }
168
169 is-flag() {
170 local x
171
172 for x in ${CFLAGS} ${CXXFLAGS} ; do
173 if [ "${x}" == "$1" ] ; then
174 echo true
175 return 0
176 fi
177 done
178 return 1
179 }
180
181 filter-mfpmath() {
182 local orig_mfpmath new_math prune_math
183
184 # save the original -mfpmath flag
185 orig_mfpmath="`get-flag -mfpmath`"
186 # get the value of the current -mfpmath flag
187 new_math=" `get-flag mfpmath | tr , ' '` "
188 # figure out which math values are to be removed
189 prune_math=""
190 for prune_math in "$@" ; do
191 new_math="${new_math/ ${prune_math} / }"
192 done
193 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
194
195 if [ -z "${new_math}" ] ; then
196 # if we're removing all user specified math values are
197 # slated for removal, then we just filter the flag
198 filter-flags ${orig_mfpmath}
199 else
200 # if we only want to filter some of the user specified
201 # math values, then we replace the current flag
202 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
203 fi
204 return 0
205 }
206
207 strip-flags() {
208 local x y flag NEW_CFLAGS NEW_CXXFLAGS
209
210 setup-allowed-flags
211
212 local NEW_CFLAGS=""
213 local NEW_CXXFLAGS=""
214
215 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
216 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
217 use debug && einfo "Enabling the use of some unstable flags"
218 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
219 fi
220
221 set -f # disable pathname expansion
222
223 for x in ${CFLAGS}; do
224 for y in ${ALLOWED_FLAGS}; do
225 flag=${x%%=*}
226 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then
227 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
228 break
229 fi
230 done
231 done
232
233 for x in ${CXXFLAGS}; do
234 for y in ${ALLOWED_FLAGS}; do
235 flag=${x%%=*}
236 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then
237 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
238 break
239 fi
240 done
241 done
242
243 # In case we filtered out all optimization flags fallback to -O2
244 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
245 NEW_CFLAGS="${NEW_CFLAGS} -O2"
246 fi
247 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
248 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
249 fi
250
251 set +f # re-enable pathname expansion
252
253 export CFLAGS="${NEW_CFLAGS}"
254 export CXXFLAGS="${NEW_CXXFLAGS}"
255 return 0
256 }
257
258 test_flag() {
259 local cc=${CC:-gcc} ; cc=${cc%% *}
260 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
261 printf "%s\n" "$*"
262 return 0
263 fi
264 return 1
265 }
266
267 test_version_info() {
268 local cc=${CC:-gcc} ; cc=${cc%% *}
269 if [[ $(${cc} --version 2>&1) == *$1* ]]; then
270 return 0
271 else
272 return 1
273 fi
274 }
275
276 strip-unsupported-flags() {
277 local NEW_CFLAGS NEW_CXXFLAGS
278
279 for x in ${CFLAGS} ; do
280 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
281 done
282 for x in ${CXXFLAGS} ; do
283 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
284 done
285
286 export CFLAGS="${NEW_CFLAGS}"
287 export CXXFLAGS="${NEW_CXXFLAGS}"
288 }
289
290 get-flag() {
291 local f findflag="$1"
292
293 # this code looks a little flaky but seems to work for
294 # everything we want ...
295 # for example, if CFLAGS="-march=i686":
296 # `get-flag -march` == "-march=i686"
297 # `get-flag march` == "i686"
298 for f in ${CFLAGS} ${CXXFLAGS} ; do
299 if [ "${f/${findflag}}" != "${f}" ] ; then
300 printf "%s\n" "${f/-${findflag}=}"
301 return 0
302 fi
303 done
304 return 1
305 }
306
307 has_hardened() {
308 test_version_info Hardened
309 return $?
310 }
311
312 has_pic() {
313 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
314 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
315 test_version_info pie && return 0
316 return 1
317 }
318
319 has_pie() {
320 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
321 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
322 test_version_info pie && return 0
323 return 1
324 }
325
326 has_ssp() {
327 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
328 test_version_info ssp && return 0
329 return 1
330 }
331
332 has_m64() {
333 # this doesnt test if the flag is accepted, it tests if the flag
334 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
335 # please dont replace this function with test_flag in some future
336 # clean-up!
337 temp=`mktemp`
338 echo "int main() { return(0); }" > ${temp}.c
339 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
340 ret=$?
341 rm -f ${temp}.c
342 [ "$ret" != "1" ] && return 0
343 return 1
344 }
345
346 has_m32() {
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 temp=`mktemp`
352 echo "int main() { return(0); }" > ${temp}.c
353 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
354 ret=$?
355 rm -f ${temp}.c
356 [ "$ret" != "1" ] && return 0
357 return 1
358 }
359
360 replace-sparc64-flags() {
361 local SPARC64_CPUS="ultrasparc v9"
362
363 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
364 for x in ${SPARC64_CPUS}; do
365 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
366 done
367 else
368 for x in ${SPARC64_CPUS}; do
369 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
370 done
371 fi
372
373 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
374 for x in ${SPARC64_CPUS}; do
375 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
376 done
377 else
378 for x in ${SPARC64_CPUS}; do
379 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
380 done
381 fi
382
383 export CFLAGS CXXFLAGS
384 }
385
386 append-ldflags() {
387 export LDFLAGS="${LDFLAGS} $*"
388 return 0
389 }
390
391 filter-ldflags() {
392 local x
393
394 # we do this fancy spacing stuff so as to not filter
395 # out part of a flag ... we want flag atoms ! :D
396 LDFLAGS=" ${LDFLAGS} "
397 for x in "$@" ; do
398 LDFLAGS="${LDFLAGS// ${x} / }"
399 done
400 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
401 export LDFLAGS
402 return 0
403 }
404
405 etexec-flags() {
406 # if you're not using a hardened compiler you wont need this
407 # PIC/no-pic kludge in the first place.
408 has_hardened || return 0
409
410 if has_pie || has_pic; then
411 [ -z "`is-flag -fno-pic`" ] &&
412 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
413 [ -z "`is-flag -nopie`" ] &&
414 export CFLAGS="${CFLAGS} `test_flag -nopie`"
415 fi
416 return 0
417 }
418
419 fstack-flags() {
420 if has_ssp; then
421 [ -z "`is-flag -fno-stack-protector`" ] &&
422 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
423 fi
424 return 0
425 }

  ViewVC Help
Powered by ViewVC 1.1.20