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Revision 1.83 - (hide annotations) (download)
Sat Feb 19 07:11:31 2005 UTC (9 years, 10 months ago) by mr_bones_
Branch: MAIN
Changes since 1.82: +10 -10 lines
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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 mr_bones_ 1.83 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.82 2005/02/07 17:50:24 solar 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 eradicator 1.80 inherit eutils toolchain-funcs multilib
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 #### fstack-flags ####
62 pappy 1.50 # hooked function for hardened gcc that appends
63     # -fno-stack-protector to {C,CXX,LD}FLAGS
64     # when a package is filtering -fstack-protector, -fstack-protector-all
65     # notice: modern automatic specs files will also suppress -fstack-protector-all
66     # when only -fno-stack-protector is given
67 solar 1.27 #
68 verwilst 1.3
69 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
70 vapier 1.36 setup-allowed-flags() {
71 vapier 1.44 if [ -z "${ALLOWED_FLAGS}" ] ; then
72 vapier 1.76 export ALLOWED_FLAGS="-pipe"
73     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
74     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
75     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
76     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
77 vapier 1.44 case "${ARCH}" in
78 robbat2 1.71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
79 lv 1.51 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
80     x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
81 vapier 1.44 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
82 vapier 1.65 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83 eradicator 1.78 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
84 chriswhite 1.79 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;;
85 vapier 1.44 esac
86     fi
87 vapier 1.65 # allow a bunch of flags that negate features / control ABI
88     ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
89     case "${ARCH}" in
90     x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
91     esac
92     ALLOWED_FLAGS="${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"
93 vapier 1.36
94     # C[XX]FLAGS that we are think is ok, but needs testing
95     # NOTE: currently -Os have issues with gcc3 and K6* arch's
96     export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
97     return 0
98 aliz 1.24 }
99 verwilst 1.13
100 vapier 1.18 filter-flags() {
101 mr_bones_ 1.83 local x f fset
102 agriffis 1.61 declare -a new_CFLAGS new_CXXFLAGS
103 agriffis 1.58
104 vapier 1.36 for x in "$@" ; do
105 solar 1.27 case "${x}" in
106 solar 1.82 -fPIC|-fpic|-fPIE|-fpie|-pie)
107     append-flags `test_flag -fno-pie`;;
108     -fstack-protector|-fstack-protector-all)
109     fstack-flags;;
110 solar 1.27 esac
111     done
112 vapier 1.36
113 agriffis 1.61 for fset in CFLAGS CXXFLAGS; do
114 agriffis 1.64 # Looping over the flags instead of using a global
115     # substitution ensures that we're working with flag atoms.
116     # Otherwise globs like -O* have the potential to wipe out the
117     # list of flags.
118 agriffis 1.61 for f in ${!fset}; do
119     for x in "$@"; do
120     # Note this should work with globs like -O*
121     [[ ${f} == ${x} ]] && continue 2
122     done
123     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
124     done
125     eval export ${fset}=\${new_${fset}\[*]}
126 verwilst 1.1 done
127 agriffis 1.61
128 vapier 1.36 return 0
129 verwilst 1.2 }
130    
131 vapier 1.40 filter-lfs-flags() {
132     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
133     }
134    
135 vapier 1.48 append-lfs-flags() {
136     append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
137     }
138    
139 vapier 1.18 append-flags() {
140 solar 1.82 [[ -z $* ]] && return 0
141 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
142     export CXXFLAGS="${CXXFLAGS} $*"
143     [ -n "`is-flag -fno-stack-protector`" -o \
144     -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
145 vapier 1.28 return 0
146 verwilst 1.1 }
147    
148 vapier 1.18 replace-flags() {
149 mr_bones_ 1.83 local f fset
150 agriffis 1.64 declare -a new_CFLAGS new_CXXFLAGS
151    
152     for fset in CFLAGS CXXFLAGS; do
153     # Looping over the flags instead of using a global
154     # substitution ensures that we're working with flag atoms.
155     # Otherwise globs like -O* have the potential to wipe out the
156     # list of flags.
157     for f in ${!fset}; do
158     # Note this should work with globs like -O*
159     [[ ${f} == ${1} ]] && f=${2}
160     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
161     done
162     eval export ${fset}=\${new_${fset}\[*]}
163     done
164    
165 vapier 1.28 return 0
166 danarmak 1.7 }
167    
168 vapier 1.37 replace-cpu-flags() {
169 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
170     while [ $# -gt 1 ] ; do
171 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
172     # ${oldcpu} prior to calling replace-flags
173 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
174     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
175     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
176     shift
177 vapier 1.37 done
178     return 0
179     }
180    
181 danarmak 1.7 is-flag() {
182 agriffis 1.58 local x
183    
184 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
185 agriffis 1.67 # Note this should work with globs like -mcpu=ultrasparc*
186     if [[ ${x} == ${1} ]]; then
187 azarah 1.8 echo true
188 vapier 1.18 return 0
189     fi
190 danarmak 1.7 done
191 vapier 1.18 return 1
192 verwilst 1.1 }
193 azarah 1.8
194 vapier 1.36 filter-mfpmath() {
195 agriffis 1.58 local orig_mfpmath new_math prune_math
196    
197 vapier 1.36 # save the original -mfpmath flag
198 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
199 vapier 1.36 # get the value of the current -mfpmath flag
200 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
201 vapier 1.36 # figure out which math values are to be removed
202 agriffis 1.58 prune_math=""
203 vapier 1.36 for prune_math in "$@" ; do
204     new_math="${new_math/ ${prune_math} / }"
205     done
206     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
207    
208     if [ -z "${new_math}" ] ; then
209     # if we're removing all user specified math values are
210     # slated for removal, then we just filter the flag
211     filter-flags ${orig_mfpmath}
212     else
213     # if we only want to filter some of the user specified
214     # math values, then we replace the current flag
215     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
216     fi
217     return 0
218     }
219    
220 azarah 1.8 strip-flags() {
221 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
222    
223 vapier 1.36 setup-allowed-flags
224    
225 azarah 1.8 local NEW_CFLAGS=""
226     local NEW_CXXFLAGS=""
227    
228 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
229 vapier 1.49 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
230     use debug && einfo "Enabling the use of some unstable flags"
231 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
232     fi
233    
234 agriffis 1.58 set -f # disable pathname expansion
235 azarah 1.8
236 agriffis 1.58 for x in ${CFLAGS}; do
237     for y in ${ALLOWED_FLAGS}; do
238 lostlogic 1.14 flag=${x%%=*}
239 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
240 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
241     break
242 azarah 1.8 fi
243     done
244     done
245    
246 agriffis 1.58 for x in ${CXXFLAGS}; do
247     for y in ${ALLOWED_FLAGS}; do
248 lostlogic 1.14 flag=${x%%=*}
249 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
250 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
251     break
252 azarah 1.8 fi
253     done
254     done
255 azarah 1.30
256     # In case we filtered out all optimization flags fallback to -O2
257     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
258     NEW_CFLAGS="${NEW_CFLAGS} -O2"
259     fi
260     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
261     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
262     fi
263 azarah 1.8
264 agriffis 1.58 set +f # re-enable pathname expansion
265 azarah 1.8
266     export CFLAGS="${NEW_CFLAGS}"
267     export CXXFLAGS="${NEW_CXXFLAGS}"
268 vapier 1.36 return 0
269 puggy 1.29 }
270    
271 vapier 1.36 test_flag() {
272 vapier 1.75 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
273 agriffis 1.58 printf "%s\n" "$*"
274 vapier 1.36 return 0
275 puggy 1.29 fi
276 vapier 1.36 return 1
277 puggy 1.29 }
278    
279 agriffis 1.58 test_version_info() {
280 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 agriffis 1.58 return 0
282     else
283     return 1
284     fi
285     }
286    
287 puggy 1.29 strip-unsupported-flags() {
288 agriffis 1.58 local NEW_CFLAGS NEW_CXXFLAGS
289    
290 vapier 1.36 for x in ${CFLAGS} ; do
291 agriffis 1.58 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
292 puggy 1.29 done
293 vapier 1.36 for x in ${CXXFLAGS} ; do
294 agriffis 1.58 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
295 puggy 1.29 done
296    
297 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
298     export CXXFLAGS="${NEW_CXXFLAGS}"
299 azarah 1.8 }
300    
301 vapier 1.10 get-flag() {
302 agriffis 1.58 local f findflag="$1"
303    
304 vapier 1.36 # this code looks a little flaky but seems to work for
305     # everything we want ...
306     # for example, if CFLAGS="-march=i686":
307 agriffis 1.58 # `get-flag -march` == "-march=i686"
308     # `get-flag march` == "i686"
309 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
310     if [ "${f/${findflag}}" != "${f}" ] ; then
311 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
312 vapier 1.28 return 0
313 vapier 1.10 fi
314     done
315 vapier 1.28 return 1
316 joker 1.16 }
317    
318 solar 1.53 has_hardened() {
319 lv 1.69 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}" != "${GCC_SPECS/hardened/}" ] && \
322     return 0
323     return 1
324 solar 1.53 }
325    
326 solar 1.81 # indicate whether PIC is set
327 tseng 1.42 has_pic() {
328     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
329     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
330 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
331 agriffis 1.58 test_version_info pie && return 0
332 tseng 1.42 return 1
333     }
334    
335 solar 1.81 # indicate whether PIE is set
336 mr_bones_ 1.83 has_pie() {
337 tseng 1.43 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
338     [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
339 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
340     # test PIC while waiting for specs to be updated to generate __PIE__
341     [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
342 tseng 1.42 return 1
343     }
344 mr_bones_ 1.83
345 solar 1.81 # indicate whether code for SSP is being generated
346 tseng 1.42 has_ssp() {
347 solar 1.81 # note; this matches both -fstack-protector and -fstack-protector-all
348 tseng 1.42 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
349 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
350 tseng 1.42 return 1
351     }
352    
353 lv 1.56 has_m64() {
354 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
355     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
356     # please dont replace this function with test_flag in some future
357     # clean-up!
358 vapier 1.72 local temp="$(emktemp)"
359 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
360 kugelfang 1.74 MY_CC=$(tc-getCC)
361     ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
362 vapier 1.72 local ret=$?
363 lv 1.62 rm -f ${temp}.c
364     [ "$ret" != "1" ] && return 0
365     return 1
366 lv 1.56 }
367    
368     has_m32() {
369 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
370     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
371     # please dont replace this function with test_flag in some future
372     # clean-up!
373 eradicator 1.80
374     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
375    
376 vapier 1.72 local temp="$(emktemp)"
377 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
378 kugelfang 1.74 MY_CC=$(tc-getCC)
379     ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
380 vapier 1.72 local ret=$?
381 lv 1.62 rm -f ${temp}.c
382     [ "$ret" != "1" ] && return 0
383     return 1
384 lv 1.56 }
385    
386 vapier 1.18 replace-sparc64-flags() {
387 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
388    
389 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
390 agriffis 1.58 for x in ${SPARC64_CPUS}; do
391 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
392     done
393 mr_bones_ 1.83 else
394 agriffis 1.58 for x in ${SPARC64_CPUS}; do
395 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
396     done
397     fi
398 mr_bones_ 1.83
399     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
400 agriffis 1.58 for x in ${SPARC64_CPUS}; do
401 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
402     done
403     else
404 agriffis 1.58 for x in ${SPARC64_CPUS}; do
405 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
406     done
407     fi
408 vapier 1.59
409     export CFLAGS CXXFLAGS
410 solar 1.27 }
411    
412     append-ldflags() {
413 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
414 vapier 1.28 return 0
415 solar 1.27 }
416    
417 solar 1.41 filter-ldflags() {
418 agriffis 1.58 local x
419    
420 solar 1.41 # we do this fancy spacing stuff so as to not filter
421     # out part of a flag ... we want flag atoms ! :D
422     LDFLAGS=" ${LDFLAGS} "
423     for x in "$@" ; do
424     LDFLAGS="${LDFLAGS// ${x} / }"
425     done
426     LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
427 vapier 1.59 export LDFLAGS
428 solar 1.41 return 0
429     }
430    
431 solar 1.27 fstack-flags() {
432 agriffis 1.58 if has_ssp; then
433 mr_bones_ 1.83 [ -z "`is-flag -fno-stack-protector`" ] &&
434 agriffis 1.58 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
435 solar 1.35 fi
436 agriffis 1.58 return 0
437 vapier 1.10 }
438 vapier 1.73
439     # This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
440     # bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
441     # fixes.
442     #
443     # Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
444     gcc2-flags() {
445     CFLAGS=${CFLAGS//pentium-mmx/i586}
446     CFLAGS=${CFLAGS//pentium[234]/i686}
447     CFLAGS=${CFLAGS//k6-[23]/k6}
448     CFLAGS=${CFLAGS//athlon-tbird/i686}
449     CFLAGS=${CFLAGS//athlon-4/i686}
450     CFLAGS=${CFLAGS//athlon-[xm]p/i686}
451     CFLAGS=${CFLAGS//athlon/i686}
452    
453     CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
454     CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
455     CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
456     CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
457     CXXFLAGS=${CXXFLAGS//athlon-4/i686}
458     CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
459     CXXFLAGS=${CXXFLAGS//athlon/i686}
460    
461     if [ "$ARCH" = alpha ]; then
462     CHOST=${CHOST/#alphaev6[78]/alphaev6}
463     CFLAGS=${CFLAGS//ev6[78]/ev6}
464     CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
465     fi
466    
467     export CFLAGS CXXFLAGS
468     }

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