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Revision 1.75 - (hide annotations) (download)
Thu Oct 28 01:38:31 2004 UTC (9 years, 10 months ago) by vapier
Branch: MAIN
Changes since 1.74: +4 -8 lines
use $(tc-getCC)

1 vapier 1.60 # Copyright 1999-2004 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.75 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.74 2004/10/21 07:40:47 kugelfang Exp $
4 vapier 1.12 #
5 verwilst 1.1 # Author Bart Verwilst <verwilst@gentoo.org>
6 azarah 1.8
7 verwilst 1.1 ECLASS=flag-o-matic
8 danarmak 1.6 INHERITED="$INHERITED $ECLASS"
9 vapier 1.63
10 vapier 1.75 IUSE="debug"
11 azarah 1.8
12 vapier 1.72 # need access to emktemp()
13 kugelfang 1.74 inherit eutils toolchain-funcs
14 vapier 1.72
15 verwilst 1.2 #
16 vapier 1.18 #### filter-flags <flags> ####
17 verwilst 1.3 # Remove particular flags from C[XX]FLAGS
18 vapier 1.18 # Matches only complete flags
19 verwilst 1.2 #
20 vapier 1.18 #### append-flags <flags> ####
21 verwilst 1.3 # Add extra flags to your current C[XX]FLAGS
22     #
23 verwilst 1.4 #### replace-flags <orig.flag> <new.flag> ###
24 verwilst 1.3 # Replace a flag by another one
25     #
26 vapier 1.70 #### replace-cpu-flags <old.cpus> <new.cpu> ###
27 vapier 1.37 # Replace march/mcpu flags that specify <old.cpus>
28     # with flags that specify <new.cpu>
29     #
30 danarmak 1.7 #### is-flag <flag> ####
31     # Returns "true" if flag is set in C[XX]FLAGS
32 vapier 1.18 # Matches only complete a flag
33 danarmak 1.7 #
34 azarah 1.8 #### strip-flags ####
35     # Strip C[XX]FLAGS of everything except known
36     # good options.
37     #
38 puggy 1.29 #### strip-unsupported-flags ####
39     # Strip C[XX]FLAGS of any flags not supported by
40     # installed version of gcc
41     #
42 vapier 1.10 #### get-flag <flag> ####
43     # Find and echo the value for a particular flag
44     #
45 joker 1.16 #### replace-sparc64-flags ####
46     # Sets mcpu to v8 and uses the original value
47     # as mtune if none specified.
48     #
49 vapier 1.26 #### 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 solar 1.27 #
54     #### append-ldflags ####
55     # Add extra flags to your current LDFLAGS
56     #
57 solar 1.41 #### filter-ldflags <flags> ####
58     # Remove particular flags from LDFLAGS
59     # Matches only complete flags
60     #
61 solar 1.27 #### etexec-flags ####
62 pappy 1.50 # 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 solar 1.27 #
66     #### fstack-flags ####
67 pappy 1.50 # 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 solar 1.27 #
73 verwilst 1.3
74 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
75 vapier 1.36 setup-allowed-flags() {
76 vapier 1.44 if [ -z "${ALLOWED_FLAGS}" ] ; then
77 lv 1.68 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g"
78 vapier 1.44 case "${ARCH}" in
79 robbat2 1.71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
80 lv 1.51 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
81     x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
82 vapier 1.44 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83 vapier 1.65 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
84 vapier 1.44 esac
85     fi
86 vapier 1.65 # 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 vapier 1.36
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 aliz 1.24 }
98 verwilst 1.13
99 vapier 1.18 filter-flags() {
100 agriffis 1.61 local x f fset
101     declare -a new_CFLAGS new_CXXFLAGS
102 agriffis 1.58
103 vapier 1.36 for x in "$@" ; do
104 solar 1.27 case "${x}" in
105 solar 1.39 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
106 solar 1.32 -fstack-protector|-fstack-protector-all) fstack-flags;;
107 solar 1.27 esac
108     done
109 vapier 1.36
110 agriffis 1.61 for fset in CFLAGS CXXFLAGS; do
111 agriffis 1.64 # 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 agriffis 1.61 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 verwilst 1.1 done
124 agriffis 1.61
125 vapier 1.36 return 0
126 verwilst 1.2 }
127    
128 vapier 1.40 filter-lfs-flags() {
129     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
130     }
131    
132 vapier 1.48 append-lfs-flags() {
133     append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
134     }
135    
136 vapier 1.18 append-flags() {
137 agriffis 1.58 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 vapier 1.28 return 0
142 verwilst 1.1 }
143    
144 vapier 1.18 replace-flags() {
145 agriffis 1.64 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 vapier 1.28 return 0
162 danarmak 1.7 }
163    
164 vapier 1.37 replace-cpu-flags() {
165 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
166     while [ $# -gt 1 ] ; do
167 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
168     # ${oldcpu} prior to calling replace-flags
169 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
170     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
171     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
172     shift
173 vapier 1.37 done
174     return 0
175     }
176    
177 danarmak 1.7 is-flag() {
178 agriffis 1.58 local x
179    
180 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
181 agriffis 1.67 # Note this should work with globs like -mcpu=ultrasparc*
182     if [[ ${x} == ${1} ]]; then
183 azarah 1.8 echo true
184 vapier 1.18 return 0
185     fi
186 danarmak 1.7 done
187 vapier 1.18 return 1
188 verwilst 1.1 }
189 azarah 1.8
190 vapier 1.36 filter-mfpmath() {
191 agriffis 1.58 local orig_mfpmath new_math prune_math
192    
193 vapier 1.36 # save the original -mfpmath flag
194 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
195 vapier 1.36 # get the value of the current -mfpmath flag
196 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
197 vapier 1.36 # figure out which math values are to be removed
198 agriffis 1.58 prune_math=""
199 vapier 1.36 for prune_math in "$@" ; 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 azarah 1.8 strip-flags() {
217 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
218    
219 vapier 1.36 setup-allowed-flags
220    
221 azarah 1.8 local NEW_CFLAGS=""
222     local NEW_CXXFLAGS=""
223    
224 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
225 vapier 1.49 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
226     use debug && einfo "Enabling the use of some unstable flags"
227 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
228     fi
229    
230 agriffis 1.58 set -f # disable pathname expansion
231 azarah 1.8
232 agriffis 1.58 for x in ${CFLAGS}; do
233     for y in ${ALLOWED_FLAGS}; do
234 lostlogic 1.14 flag=${x%%=*}
235 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
236 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
237     break
238 azarah 1.8 fi
239     done
240     done
241    
242 agriffis 1.58 for x in ${CXXFLAGS}; do
243     for y in ${ALLOWED_FLAGS}; do
244 lostlogic 1.14 flag=${x%%=*}
245 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
246 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
247     break
248 azarah 1.8 fi
249     done
250     done
251 azarah 1.30
252     # In case we filtered out all optimization flags fallback to -O2
253     if [ "${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="${NEW_CXXFLAGS} -O2"
258     fi
259 azarah 1.8
260 agriffis 1.58 set +f # re-enable pathname expansion
261 azarah 1.8
262     export CFLAGS="${NEW_CFLAGS}"
263     export CXXFLAGS="${NEW_CXXFLAGS}"
264 vapier 1.36 return 0
265 puggy 1.29 }
266    
267 vapier 1.36 test_flag() {
268 vapier 1.75 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
269 agriffis 1.58 printf "%s\n" "$*"
270 vapier 1.36 return 0
271 puggy 1.29 fi
272 vapier 1.36 return 1
273 puggy 1.29 }
274    
275 agriffis 1.58 test_version_info() {
276 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
277 agriffis 1.58 return 0
278     else
279     return 1
280     fi
281     }
282    
283 puggy 1.29 strip-unsupported-flags() {
284 agriffis 1.58 local NEW_CFLAGS NEW_CXXFLAGS
285    
286 vapier 1.36 for x in ${CFLAGS} ; do
287 agriffis 1.58 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
288 puggy 1.29 done
289 vapier 1.36 for x in ${CXXFLAGS} ; do
290 agriffis 1.58 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
291 puggy 1.29 done
292    
293 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
294     export CXXFLAGS="${NEW_CXXFLAGS}"
295 azarah 1.8 }
296    
297 vapier 1.10 get-flag() {
298 agriffis 1.58 local f findflag="$1"
299    
300 vapier 1.36 # this code looks a little flaky but seems to work for
301     # everything we want ...
302     # for example, if CFLAGS="-march=i686":
303 agriffis 1.58 # `get-flag -march` == "-march=i686"
304     # `get-flag march` == "i686"
305 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
306     if [ "${f/${findflag}}" != "${f}" ] ; then
307 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
308 vapier 1.28 return 0
309 vapier 1.10 fi
310     done
311 vapier 1.28 return 1
312 joker 1.16 }
313    
314 solar 1.53 has_hardened() {
315 lv 1.69 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}" != "${GCC_SPECS/hardened/}" ] && \
318     return 0
319     return 1
320 solar 1.53 }
321    
322 tseng 1.42 has_pic() {
323     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
324     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
325 agriffis 1.58 test_version_info pie && return 0
326 tseng 1.42 return 1
327     }
328    
329     has_pie() {
330 tseng 1.43 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
331     [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
332 agriffis 1.58 test_version_info pie && return 0
333 tseng 1.42 return 1
334     }
335    
336     has_ssp() {
337     [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
338 agriffis 1.58 test_version_info ssp && return 0
339 tseng 1.42 return 1
340     }
341    
342 lv 1.56 has_m64() {
343 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
344     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
345     # please dont replace this function with test_flag in some future
346     # clean-up!
347 vapier 1.72 local temp="$(emktemp)"
348 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
349 kugelfang 1.74 MY_CC=$(tc-getCC)
350     ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
351 vapier 1.72 local ret=$?
352 lv 1.62 rm -f ${temp}.c
353     [ "$ret" != "1" ] && return 0
354     return 1
355 lv 1.56 }
356    
357     has_m32() {
358 lv 1.62 # 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 vapier 1.72 local temp="$(emktemp)"
363 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
364 kugelfang 1.74 MY_CC=$(tc-getCC)
365     ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
366 vapier 1.72 local ret=$?
367 lv 1.62 rm -f ${temp}.c
368     [ "$ret" != "1" ] && return 0
369     return 1
370 lv 1.56 }
371    
372 vapier 1.18 replace-sparc64-flags() {
373 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
374    
375 agriffis 1.58 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
376     for x in ${SPARC64_CPUS}; do
377 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
378     done
379     else
380 agriffis 1.58 for x in ${SPARC64_CPUS}; do
381 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
382     done
383     fi
384    
385 agriffis 1.58 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
386     for x in ${SPARC64_CPUS}; do
387 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
388     done
389     else
390 agriffis 1.58 for x in ${SPARC64_CPUS}; do
391 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
392     done
393     fi
394 vapier 1.59
395     export CFLAGS CXXFLAGS
396 solar 1.27 }
397    
398     append-ldflags() {
399 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
400 vapier 1.28 return 0
401 solar 1.27 }
402    
403 solar 1.41 filter-ldflags() {
404 agriffis 1.58 local x
405    
406 solar 1.41 # 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:${#LDFLAGS}-2}"
413 vapier 1.59 export LDFLAGS
414 solar 1.41 return 0
415     }
416    
417 vapier 1.36 etexec-flags() {
418 agriffis 1.58 # if you're not using a hardened compiler you wont need this
419 solar 1.53 # PIC/no-pic kludge in the first place.
420 agriffis 1.58 has_hardened || return 0
421 lv 1.66 # this kludge breaks on amd64, and probably other -fPIC dependant
422     # archs.
423     use amd64 && return 0
424 pappy 1.50
425 agriffis 1.58 if has_pie || has_pic; then
426     [ -z "`is-flag -fno-pic`" ] &&
427     export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
428     [ -z "`is-flag -nopie`" ] &&
429     export CFLAGS="${CFLAGS} `test_flag -nopie`"
430 solar 1.35 fi
431 agriffis 1.58 return 0
432 solar 1.27 }
433    
434     fstack-flags() {
435 agriffis 1.58 if has_ssp; then
436     [ -z "`is-flag -fno-stack-protector`" ] &&
437     export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
438 solar 1.35 fi
439 agriffis 1.58 return 0
440 vapier 1.10 }
441 vapier 1.73
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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