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Revision 1.76 - (hide annotations) (download)
Sat Oct 30 00:00:14 2004 UTC (9 years, 9 months ago) by vapier
Branch: MAIN
Changes since 1.75: +6 -2 lines
allow debugging flags through strip-flags

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 1.76 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.75 2004/10/28 01:38:31 vapier 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 vapier 1.76 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 vapier 1.44 case "${ARCH}" in
83 robbat2 1.71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
84 lv 1.51 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
85     x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
86 vapier 1.44 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
87 vapier 1.65 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
88 vapier 1.44 esac
89     fi
90 vapier 1.65 # allow a bunch of flags that negate features / control ABI
91     ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
92     case "${ARCH}" in
93     x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
94     esac
95     ALLOWED_FLAGS="${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"
96 vapier 1.36
97     # C[XX]FLAGS that we are think is ok, but needs testing
98     # NOTE: currently -Os have issues with gcc3 and K6* arch's
99     export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
100     return 0
101 aliz 1.24 }
102 verwilst 1.13
103 vapier 1.18 filter-flags() {
104 agriffis 1.61 local x f fset
105     declare -a new_CFLAGS new_CXXFLAGS
106 agriffis 1.58
107 vapier 1.36 for x in "$@" ; do
108 solar 1.27 case "${x}" in
109 solar 1.39 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
110 solar 1.32 -fstack-protector|-fstack-protector-all) fstack-flags;;
111 solar 1.27 esac
112     done
113 vapier 1.36
114 agriffis 1.61 for fset in CFLAGS CXXFLAGS; do
115 agriffis 1.64 # Looping over the flags instead of using a global
116     # substitution ensures that we're working with flag atoms.
117     # Otherwise globs like -O* have the potential to wipe out the
118     # list of flags.
119 agriffis 1.61 for f in ${!fset}; do
120     for x in "$@"; do
121     # Note this should work with globs like -O*
122     [[ ${f} == ${x} ]] && continue 2
123     done
124     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
125     done
126     eval export ${fset}=\${new_${fset}\[*]}
127 verwilst 1.1 done
128 agriffis 1.61
129 vapier 1.36 return 0
130 verwilst 1.2 }
131    
132 vapier 1.40 filter-lfs-flags() {
133     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
134     }
135    
136 vapier 1.48 append-lfs-flags() {
137     append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
138     }
139    
140 vapier 1.18 append-flags() {
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 agriffis 1.64 local f fset
150     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}" != "${GCC_SPECS/hardened/}" ] && \
322     return 0
323     return 1
324 solar 1.53 }
325    
326 tseng 1.42 has_pic() {
327     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
328     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
329 agriffis 1.58 test_version_info pie && return 0
330 tseng 1.42 return 1
331     }
332    
333     has_pie() {
334 tseng 1.43 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
335     [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
336 agriffis 1.58 test_version_info pie && return 0
337 tseng 1.42 return 1
338     }
339    
340     has_ssp() {
341     [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
342 agriffis 1.58 test_version_info ssp && return 0
343 tseng 1.42 return 1
344     }
345    
346 lv 1.56 has_m64() {
347 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
348     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349     # please dont replace this function with test_flag in some future
350     # clean-up!
351 vapier 1.72 local temp="$(emktemp)"
352 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
353 kugelfang 1.74 MY_CC=$(tc-getCC)
354     ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
355 vapier 1.72 local ret=$?
356 lv 1.62 rm -f ${temp}.c
357     [ "$ret" != "1" ] && return 0
358     return 1
359 lv 1.56 }
360    
361     has_m32() {
362 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
363     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
364     # please dont replace this function with test_flag in some future
365     # clean-up!
366 vapier 1.72 local temp="$(emktemp)"
367 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
368 kugelfang 1.74 MY_CC=$(tc-getCC)
369     ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
370 vapier 1.72 local ret=$?
371 lv 1.62 rm -f ${temp}.c
372     [ "$ret" != "1" ] && return 0
373     return 1
374 lv 1.56 }
375    
376 vapier 1.18 replace-sparc64-flags() {
377 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
378    
379 agriffis 1.58 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
380     for x in ${SPARC64_CPUS}; do
381 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
382     done
383     else
384 agriffis 1.58 for x in ${SPARC64_CPUS}; do
385 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
386     done
387     fi
388    
389 agriffis 1.58 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
390     for x in ${SPARC64_CPUS}; do
391 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
392     done
393     else
394 agriffis 1.58 for x in ${SPARC64_CPUS}; do
395 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
396     done
397     fi
398 vapier 1.59
399     export CFLAGS CXXFLAGS
400 solar 1.27 }
401    
402     append-ldflags() {
403 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
404 vapier 1.28 return 0
405 solar 1.27 }
406    
407 solar 1.41 filter-ldflags() {
408 agriffis 1.58 local x
409    
410 solar 1.41 # we do this fancy spacing stuff so as to not filter
411     # out part of a flag ... we want flag atoms ! :D
412     LDFLAGS=" ${LDFLAGS} "
413     for x in "$@" ; do
414     LDFLAGS="${LDFLAGS// ${x} / }"
415     done
416     LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
417 vapier 1.59 export LDFLAGS
418 solar 1.41 return 0
419     }
420    
421 vapier 1.36 etexec-flags() {
422 agriffis 1.58 # if you're not using a hardened compiler you wont need this
423 solar 1.53 # PIC/no-pic kludge in the first place.
424 agriffis 1.58 has_hardened || return 0
425 lv 1.66 # this kludge breaks on amd64, and probably other -fPIC dependant
426     # archs.
427     use amd64 && return 0
428 pappy 1.50
429 agriffis 1.58 if has_pie || has_pic; then
430     [ -z "`is-flag -fno-pic`" ] &&
431     export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
432     [ -z "`is-flag -nopie`" ] &&
433     export CFLAGS="${CFLAGS} `test_flag -nopie`"
434 solar 1.35 fi
435 agriffis 1.58 return 0
436 solar 1.27 }
437    
438     fstack-flags() {
439 agriffis 1.58 if has_ssp; then
440     [ -z "`is-flag -fno-stack-protector`" ] &&
441     export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
442 solar 1.35 fi
443 agriffis 1.58 return 0
444 vapier 1.10 }
445 vapier 1.73
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     }

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