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Revision 1.73 - (hide annotations) (download)
Wed Oct 13 14:11:52 2004 UTC (9 years, 9 months ago) by vapier
Branch: MAIN
Changes since 1.72: +32 -1 lines
move gcc2-flags out of gcc.eclass and into flag-o-matic

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 1.73 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.72 2004/10/09 18:28:46 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 agriffis 1.64 # Please leave ${IUSE} in this until portage .51 is stable, otherwise
11     # IUSE gets clobbered.
12     IUSE="${IUSE} debug"
13 azarah 1.8
14 vapier 1.72 # need access to emktemp()
15     inherit eutils
16    
17 verwilst 1.2 #
18 vapier 1.18 #### filter-flags <flags> ####
19 verwilst 1.3 # Remove particular flags from C[XX]FLAGS
20 vapier 1.18 # Matches only complete flags
21 verwilst 1.2 #
22 vapier 1.18 #### append-flags <flags> ####
23 verwilst 1.3 # Add extra flags to your current C[XX]FLAGS
24     #
25 verwilst 1.4 #### replace-flags <orig.flag> <new.flag> ###
26 verwilst 1.3 # Replace a flag by another one
27     #
28 vapier 1.70 #### replace-cpu-flags <old.cpus> <new.cpu> ###
29 vapier 1.37 # Replace march/mcpu flags that specify <old.cpus>
30     # with flags that specify <new.cpu>
31     #
32 danarmak 1.7 #### is-flag <flag> ####
33     # Returns "true" if flag is set in C[XX]FLAGS
34 vapier 1.18 # Matches only complete a flag
35 danarmak 1.7 #
36 azarah 1.8 #### strip-flags ####
37     # Strip C[XX]FLAGS of everything except known
38     # good options.
39     #
40 puggy 1.29 #### strip-unsupported-flags ####
41     # Strip C[XX]FLAGS of any flags not supported by
42     # installed version of gcc
43     #
44 vapier 1.10 #### get-flag <flag> ####
45     # Find and echo the value for a particular flag
46     #
47 joker 1.16 #### replace-sparc64-flags ####
48     # Sets mcpu to v8 and uses the original value
49     # as mtune if none specified.
50     #
51 vapier 1.26 #### filter-mfpmath <math types> ####
52     # Remove specified math types from the fpmath specification
53     # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
54     # will leave the user with -mfpmath=386
55 solar 1.27 #
56     #### append-ldflags ####
57     # Add extra flags to your current LDFLAGS
58     #
59 solar 1.41 #### filter-ldflags <flags> ####
60     # Remove particular flags from LDFLAGS
61     # Matches only complete flags
62     #
63 solar 1.27 #### etexec-flags ####
64 pappy 1.50 # hooked function for hardened gcc that appends
65     # -fno-pic to {C,CXX,LD}FLAGS
66     # when a package is filtering -fpic, -fPIC, -fpie, -fPIE
67 solar 1.27 #
68     #### fstack-flags ####
69 pappy 1.50 # hooked function for hardened gcc that appends
70     # -fno-stack-protector to {C,CXX,LD}FLAGS
71     # when a package is filtering -fstack-protector, -fstack-protector-all
72     # notice: modern automatic specs files will also suppress -fstack-protector-all
73     # when only -fno-stack-protector is given
74 solar 1.27 #
75 verwilst 1.3
76 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
77 vapier 1.36 setup-allowed-flags() {
78 vapier 1.44 if [ -z "${ALLOWED_FLAGS}" ] ; then
79 lv 1.68 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g"
80 vapier 1.44 case "${ARCH}" in
81 robbat2 1.71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
82 lv 1.51 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
83     x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
84 vapier 1.44 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
85 vapier 1.65 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
86 vapier 1.44 esac
87     fi
88 vapier 1.65 # allow a bunch of flags that negate features / control ABI
89     ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
90     case "${ARCH}" in
91     x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
92     esac
93     ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
94 vapier 1.36
95     # C[XX]FLAGS that we are think is ok, but needs testing
96     # NOTE: currently -Os have issues with gcc3 and K6* arch's
97     export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
98     return 0
99 aliz 1.24 }
100 verwilst 1.13
101 vapier 1.18 filter-flags() {
102 agriffis 1.61 local x f fset
103     declare -a new_CFLAGS new_CXXFLAGS
104 agriffis 1.58
105 vapier 1.36 for x in "$@" ; do
106 solar 1.27 case "${x}" in
107 solar 1.39 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
108 solar 1.32 -fstack-protector|-fstack-protector-all) fstack-flags;;
109 solar 1.27 esac
110     done
111 vapier 1.36
112 agriffis 1.61 for fset in CFLAGS CXXFLAGS; do
113 agriffis 1.64 # Looping over the flags instead of using a global
114     # substitution ensures that we're working with flag atoms.
115     # Otherwise globs like -O* have the potential to wipe out the
116     # list of flags.
117 agriffis 1.61 for f in ${!fset}; do
118     for x in "$@"; do
119     # Note this should work with globs like -O*
120     [[ ${f} == ${x} ]] && continue 2
121     done
122     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
123     done
124     eval export ${fset}=\${new_${fset}\[*]}
125 verwilst 1.1 done
126 agriffis 1.61
127 vapier 1.36 return 0
128 verwilst 1.2 }
129    
130 vapier 1.40 filter-lfs-flags() {
131     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
132     }
133    
134 vapier 1.48 append-lfs-flags() {
135     append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136     }
137    
138 vapier 1.18 append-flags() {
139 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
140     export CXXFLAGS="${CXXFLAGS} $*"
141     [ -n "`is-flag -fno-stack-protector`" -o \
142     -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
143 vapier 1.28 return 0
144 verwilst 1.1 }
145    
146 vapier 1.18 replace-flags() {
147 agriffis 1.64 local f fset
148     declare -a new_CFLAGS new_CXXFLAGS
149    
150     for fset in CFLAGS CXXFLAGS; do
151     # Looping over the flags instead of using a global
152     # substitution ensures that we're working with flag atoms.
153     # Otherwise globs like -O* have the potential to wipe out the
154     # list of flags.
155     for f in ${!fset}; do
156     # Note this should work with globs like -O*
157     [[ ${f} == ${1} ]] && f=${2}
158     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
159     done
160     eval export ${fset}=\${new_${fset}\[*]}
161     done
162    
163 vapier 1.28 return 0
164 danarmak 1.7 }
165    
166 vapier 1.37 replace-cpu-flags() {
167 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
168     while [ $# -gt 1 ] ; do
169 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
170     # ${oldcpu} prior to calling replace-flags
171 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
172     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
173     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
174     shift
175 vapier 1.37 done
176     return 0
177     }
178    
179 danarmak 1.7 is-flag() {
180 agriffis 1.58 local x
181    
182 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
183 agriffis 1.67 # Note this should work with globs like -mcpu=ultrasparc*
184     if [[ ${x} == ${1} ]]; then
185 azarah 1.8 echo true
186 vapier 1.18 return 0
187     fi
188 danarmak 1.7 done
189 vapier 1.18 return 1
190 verwilst 1.1 }
191 azarah 1.8
192 vapier 1.36 filter-mfpmath() {
193 agriffis 1.58 local orig_mfpmath new_math prune_math
194    
195 vapier 1.36 # save the original -mfpmath flag
196 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
197 vapier 1.36 # get the value of the current -mfpmath flag
198 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
199 vapier 1.36 # figure out which math values are to be removed
200 agriffis 1.58 prune_math=""
201 vapier 1.36 for prune_math in "$@" ; do
202     new_math="${new_math/ ${prune_math} / }"
203     done
204     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
205    
206     if [ -z "${new_math}" ] ; then
207     # if we're removing all user specified math values are
208     # slated for removal, then we just filter the flag
209     filter-flags ${orig_mfpmath}
210     else
211     # if we only want to filter some of the user specified
212     # math values, then we replace the current flag
213     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
214     fi
215     return 0
216     }
217    
218 azarah 1.8 strip-flags() {
219 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
220    
221 vapier 1.36 setup-allowed-flags
222    
223 azarah 1.8 local NEW_CFLAGS=""
224     local NEW_CXXFLAGS=""
225    
226 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
227 vapier 1.49 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
228     use debug && einfo "Enabling the use of some unstable flags"
229 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
230     fi
231    
232 agriffis 1.58 set -f # disable pathname expansion
233 azarah 1.8
234 agriffis 1.58 for x in ${CFLAGS}; do
235     for y in ${ALLOWED_FLAGS}; do
236 lostlogic 1.14 flag=${x%%=*}
237 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
238 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
239     break
240 azarah 1.8 fi
241     done
242     done
243    
244 agriffis 1.58 for x in ${CXXFLAGS}; do
245     for y in ${ALLOWED_FLAGS}; do
246 lostlogic 1.14 flag=${x%%=*}
247 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
248 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
249     break
250 azarah 1.8 fi
251     done
252     done
253 azarah 1.30
254     # In case we filtered out all optimization flags fallback to -O2
255     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
256     NEW_CFLAGS="${NEW_CFLAGS} -O2"
257     fi
258     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
259     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
260     fi
261 azarah 1.8
262 agriffis 1.58 set +f # re-enable pathname expansion
263 azarah 1.8
264     export CFLAGS="${NEW_CFLAGS}"
265     export CXXFLAGS="${NEW_CXXFLAGS}"
266 vapier 1.36 return 0
267 puggy 1.29 }
268    
269 vapier 1.36 test_flag() {
270 agriffis 1.58 local cc=${CC:-gcc} ; cc=${cc%% *}
271 vapier 1.72 if ${cc} -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
272 agriffis 1.58 printf "%s\n" "$*"
273 vapier 1.36 return 0
274 puggy 1.29 fi
275 vapier 1.36 return 1
276 puggy 1.29 }
277    
278 agriffis 1.58 test_version_info() {
279     local cc=${CC:-gcc} ; cc=${cc%% *}
280     if [[ $(${cc} --version 2>&1) == *$1* ]]; then
281     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 vapier 1.72 ${CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
354     local ret=$?
355 lv 1.62 rm -f ${temp}.c
356     [ "$ret" != "1" ] && return 0
357     return 1
358 lv 1.56 }
359    
360     has_m32() {
361 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
362     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
363     # please dont replace this function with test_flag in some future
364     # clean-up!
365 vapier 1.72 local temp="$(emktemp)"
366 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
367 vapier 1.72 ${CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
368     local ret=$?
369 lv 1.62 rm -f ${temp}.c
370     [ "$ret" != "1" ] && return 0
371     return 1
372 lv 1.56 }
373    
374 vapier 1.18 replace-sparc64-flags() {
375 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
376    
377 agriffis 1.58 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
378     for x in ${SPARC64_CPUS}; do
379 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
380     done
381     else
382 agriffis 1.58 for x in ${SPARC64_CPUS}; do
383 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
384     done
385     fi
386    
387 agriffis 1.58 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
388     for x in ${SPARC64_CPUS}; do
389 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
390     done
391     else
392 agriffis 1.58 for x in ${SPARC64_CPUS}; do
393 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
394     done
395     fi
396 vapier 1.59
397     export CFLAGS CXXFLAGS
398 solar 1.27 }
399    
400     append-ldflags() {
401 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
402 vapier 1.28 return 0
403 solar 1.27 }
404    
405 solar 1.41 filter-ldflags() {
406 agriffis 1.58 local x
407    
408 solar 1.41 # we do this fancy spacing stuff so as to not filter
409     # out part of a flag ... we want flag atoms ! :D
410     LDFLAGS=" ${LDFLAGS} "
411     for x in "$@" ; do
412     LDFLAGS="${LDFLAGS// ${x} / }"
413     done
414     LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
415 vapier 1.59 export LDFLAGS
416 solar 1.41 return 0
417     }
418    
419 vapier 1.36 etexec-flags() {
420 agriffis 1.58 # if you're not using a hardened compiler you wont need this
421 solar 1.53 # PIC/no-pic kludge in the first place.
422 agriffis 1.58 has_hardened || return 0
423 lv 1.66 # this kludge breaks on amd64, and probably other -fPIC dependant
424     # archs.
425     use amd64 && return 0
426 pappy 1.50
427 agriffis 1.58 if has_pie || has_pic; then
428     [ -z "`is-flag -fno-pic`" ] &&
429     export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
430     [ -z "`is-flag -nopie`" ] &&
431     export CFLAGS="${CFLAGS} `test_flag -nopie`"
432 solar 1.35 fi
433 agriffis 1.58 return 0
434 solar 1.27 }
435    
436     fstack-flags() {
437 agriffis 1.58 if has_ssp; then
438     [ -z "`is-flag -fno-stack-protector`" ] &&
439     export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
440 solar 1.35 fi
441 agriffis 1.58 return 0
442 vapier 1.10 }
443 vapier 1.73
444     # This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
445     # bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
446     # fixes.
447     #
448     # Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
449     gcc2-flags() {
450     CFLAGS=${CFLAGS//pentium-mmx/i586}
451     CFLAGS=${CFLAGS//pentium[234]/i686}
452     CFLAGS=${CFLAGS//k6-[23]/k6}
453     CFLAGS=${CFLAGS//athlon-tbird/i686}
454     CFLAGS=${CFLAGS//athlon-4/i686}
455     CFLAGS=${CFLAGS//athlon-[xm]p/i686}
456     CFLAGS=${CFLAGS//athlon/i686}
457    
458     CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
459     CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
460     CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
461     CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
462     CXXFLAGS=${CXXFLAGS//athlon-4/i686}
463     CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
464     CXXFLAGS=${CXXFLAGS//athlon/i686}
465    
466     if [ "$ARCH" = alpha ]; then
467     CHOST=${CHOST/#alphaev6[78]/alphaev6}
468     CFLAGS=${CFLAGS//ev6[78]/ev6}
469     CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
470     fi
471    
472     export CFLAGS CXXFLAGS
473     }

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