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Revision 1.89 - (hide annotations) (download)
Wed Jul 6 20:23:20 2005 UTC (9 years, 4 months ago) by agriffis
Branch: MAIN
Changes since 1.88: +1 -2 lines
Remove ECLASS= and INHERITED= which haven't been necessary for a long time now

1 vapier 1.84 # Copyright 1999-2005 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 agriffis 1.89 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.88 2005/07/06 20:20:03 agriffis Exp $
4 azarah 1.8
5 vapier 1.63
6 vapier 1.72 # need access to emktemp()
7 eradicator 1.80 inherit eutils toolchain-funcs multilib
8 vapier 1.72
9 verwilst 1.2 #
10 vapier 1.18 #### filter-flags <flags> ####
11 verwilst 1.3 # Remove particular flags from C[XX]FLAGS
12 vapier 1.18 # Matches only complete flags
13 verwilst 1.2 #
14 vapier 1.18 #### append-flags <flags> ####
15 verwilst 1.3 # Add extra flags to your current C[XX]FLAGS
16     #
17 verwilst 1.4 #### replace-flags <orig.flag> <new.flag> ###
18 verwilst 1.3 # Replace a flag by another one
19     #
20 vapier 1.70 #### replace-cpu-flags <old.cpus> <new.cpu> ###
21 vapier 1.37 # Replace march/mcpu flags that specify <old.cpus>
22     # with flags that specify <new.cpu>
23     #
24 danarmak 1.7 #### is-flag <flag> ####
25     # Returns "true" if flag is set in C[XX]FLAGS
26 vapier 1.18 # Matches only complete a flag
27 danarmak 1.7 #
28 azarah 1.8 #### strip-flags ####
29     # Strip C[XX]FLAGS of everything except known
30     # good options.
31     #
32 puggy 1.29 #### strip-unsupported-flags ####
33     # Strip C[XX]FLAGS of any flags not supported by
34     # installed version of gcc
35     #
36 vapier 1.10 #### get-flag <flag> ####
37     # Find and echo the value for a particular flag
38     #
39 joker 1.16 #### replace-sparc64-flags ####
40     # Sets mcpu to v8 and uses the original value
41     # as mtune if none specified.
42     #
43 vapier 1.26 #### filter-mfpmath <math types> ####
44     # Remove specified math types from the fpmath specification
45     # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
46     # will leave the user with -mfpmath=386
47 solar 1.27 #
48     #### append-ldflags ####
49     # Add extra flags to your current LDFLAGS
50     #
51 solar 1.41 #### filter-ldflags <flags> ####
52     # Remove particular flags from LDFLAGS
53     # Matches only complete flags
54     #
55 solar 1.27 #### fstack-flags ####
56 pappy 1.50 # hooked function for hardened gcc that appends
57     # -fno-stack-protector to {C,CXX,LD}FLAGS
58     # when a package is filtering -fstack-protector, -fstack-protector-all
59     # notice: modern automatic specs files will also suppress -fstack-protector-all
60     # when only -fno-stack-protector is given
61 solar 1.27 #
62 solar 1.86 #### has_pic ####
63     # Returns true if the compiler by default or with current CFLAGS
64     # builds position-independent code.
65     #
66     #### has_ssp_all ####
67     # Returns true if the compiler by default or with current CFLAGS
68     # generates stack smash protections for all functions
69     #
70     #### has_ssp ####
71     # Returns true if the compiler by default or with current CFLAGS
72     # generates stack smash protections for most vulnerable functions
73     #
74 verwilst 1.3
75 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
76 vapier 1.36 setup-allowed-flags() {
77 vapier 1.84 if [[ -z ${ALLOWED_FLAGS} ]] ; then
78 vapier 1.76 export ALLOWED_FLAGS="-pipe"
79     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
80 vapier 1.87 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
81     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
82 vapier 1.76 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
83     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
84 vapier 1.44 fi
85 vapier 1.65 # allow a bunch of flags that negate features / control ABI
86     ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
87 vapier 1.87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
88     -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
89     -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
90     -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
91     -mflat -mno-flat -mno-faster-structs -mfaster-structs \
92     -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
93     -mlive-g0 -mcmodel -mstack-bias -mno-stack-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 mr_bones_ 1.83 local x f fset
103 agriffis 1.61 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 1.82 -fPIC|-fpic|-fPIE|-fpie|-pie)
108     append-flags `test_flag -fno-pie`;;
109     -fstack-protector|-fstack-protector-all)
110     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 solar 1.82 [[ -z $* ]] && return 0
142 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
143     export CXXFLAGS="${CXXFLAGS} $*"
144     [ -n "`is-flag -fno-stack-protector`" -o \
145     -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
146 vapier 1.28 return 0
147 verwilst 1.1 }
148    
149 vapier 1.18 replace-flags() {
150 mr_bones_ 1.83 local f fset
151 agriffis 1.64 declare -a new_CFLAGS new_CXXFLAGS
152    
153     for fset in CFLAGS CXXFLAGS; do
154     # Looping over the flags instead of using a global
155     # substitution ensures that we're working with flag atoms.
156     # Otherwise globs like -O* have the potential to wipe out the
157     # list of flags.
158     for f in ${!fset}; do
159     # Note this should work with globs like -O*
160     [[ ${f} == ${1} ]] && f=${2}
161     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
162     done
163     eval export ${fset}=\${new_${fset}\[*]}
164     done
165    
166 vapier 1.28 return 0
167 danarmak 1.7 }
168    
169 vapier 1.37 replace-cpu-flags() {
170 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
171     while [ $# -gt 1 ] ; do
172 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
173     # ${oldcpu} prior to calling replace-flags
174 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
175     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
176     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
177     shift
178 vapier 1.37 done
179     return 0
180     }
181    
182 danarmak 1.7 is-flag() {
183 agriffis 1.58 local x
184    
185 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
186 agriffis 1.67 # Note this should work with globs like -mcpu=ultrasparc*
187     if [[ ${x} == ${1} ]]; then
188 azarah 1.8 echo true
189 vapier 1.18 return 0
190     fi
191 danarmak 1.7 done
192 vapier 1.18 return 1
193 verwilst 1.1 }
194 azarah 1.8
195 vapier 1.36 filter-mfpmath() {
196 agriffis 1.58 local orig_mfpmath new_math prune_math
197    
198 vapier 1.36 # save the original -mfpmath flag
199 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
200 vapier 1.36 # get the value of the current -mfpmath flag
201 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
202 vapier 1.36 # figure out which math values are to be removed
203 agriffis 1.58 prune_math=""
204 vapier 1.36 for prune_math in "$@" ; do
205     new_math="${new_math/ ${prune_math} / }"
206     done
207     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
208    
209     if [ -z "${new_math}" ] ; then
210     # if we're removing all user specified math values are
211     # slated for removal, then we just filter the flag
212     filter-flags ${orig_mfpmath}
213     else
214     # if we only want to filter some of the user specified
215     # math values, then we replace the current flag
216     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
217     fi
218     return 0
219     }
220    
221 azarah 1.8 strip-flags() {
222 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
223    
224 vapier 1.36 setup-allowed-flags
225    
226 azarah 1.8 local NEW_CFLAGS=""
227     local NEW_CXXFLAGS=""
228    
229 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
230 vapier 1.84 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
231 azarah 1.17 ALLOWED_FLAGS="${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) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
331 tseng 1.42 return 1
332     }
333    
334 solar 1.81 # indicate whether PIE is set
335 mr_bones_ 1.83 has_pie() {
336 tseng 1.43 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
337     [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
338 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
339     # test PIC while waiting for specs to be updated to generate __PIE__
340     [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
341 tseng 1.42 return 1
342     }
343 mr_bones_ 1.83
344 solar 1.86 # indicate whether code for SSP is being generated for all functions
345     has_ssp_all() {
346     # note; this matches only -fstack-protector-all
347     [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
348     [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
349     return 1
350     }
351    
352 solar 1.81 # indicate whether code for SSP is being generated
353 tseng 1.42 has_ssp() {
354 solar 1.81 # note; this matches both -fstack-protector and -fstack-protector-all
355 tseng 1.42 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
356 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
357 tseng 1.42 return 1
358     }
359    
360 lv 1.56 has_m64() {
361 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
362     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
363     # please dont replace this function with test_flag in some future
364     # clean-up!
365 vapier 1.72 local temp="$(emktemp)"
366 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
367 kugelfang 1.74 MY_CC=$(tc-getCC)
368     ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
369 vapier 1.72 local ret=$?
370 lv 1.62 rm -f ${temp}.c
371     [ "$ret" != "1" ] && return 0
372     return 1
373 lv 1.56 }
374    
375     has_m32() {
376 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
377     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
378     # please dont replace this function with test_flag in some future
379     # clean-up!
380 eradicator 1.80
381     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
382    
383 vapier 1.72 local temp="$(emktemp)"
384 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
385 kugelfang 1.74 MY_CC=$(tc-getCC)
386     ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
387 vapier 1.72 local ret=$?
388 lv 1.62 rm -f ${temp}.c
389     [ "$ret" != "1" ] && return 0
390     return 1
391 lv 1.56 }
392    
393 vapier 1.18 replace-sparc64-flags() {
394 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
395    
396 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
397 agriffis 1.58 for x in ${SPARC64_CPUS}; do
398 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
399     done
400 mr_bones_ 1.83 else
401 agriffis 1.58 for x in ${SPARC64_CPUS}; do
402 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
403     done
404     fi
405 mr_bones_ 1.83
406     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
407 agriffis 1.58 for x in ${SPARC64_CPUS}; do
408 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
409     done
410     else
411 agriffis 1.58 for x in ${SPARC64_CPUS}; do
412 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
413     done
414     fi
415 vapier 1.59
416     export CFLAGS CXXFLAGS
417 solar 1.27 }
418    
419     append-ldflags() {
420 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
421 vapier 1.28 return 0
422 solar 1.27 }
423    
424 solar 1.41 filter-ldflags() {
425 agriffis 1.58 local x
426    
427 solar 1.41 # we do this fancy spacing stuff so as to not filter
428     # out part of a flag ... we want flag atoms ! :D
429     LDFLAGS=" ${LDFLAGS} "
430     for x in "$@" ; do
431 vapier 1.84 LDFLAGS=${LDFLAGS// ${x} / }
432 solar 1.41 done
433 vapier 1.84 [[ -z ${LDFLAGS// } ]] \
434     && LDFLAGS="" \
435     || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
436 vapier 1.59 export LDFLAGS
437 solar 1.41 return 0
438     }
439    
440 solar 1.27 fstack-flags() {
441 agriffis 1.58 if has_ssp; then
442 mr_bones_ 1.83 [ -z "`is-flag -fno-stack-protector`" ] &&
443 agriffis 1.58 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
444 solar 1.35 fi
445 agriffis 1.58 return 0
446 vapier 1.10 }
447 vapier 1.73
448     # This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
449     # bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
450     # fixes.
451     #
452     # Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
453     gcc2-flags() {
454 vapier 1.85 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
455     CFLAGS=${CFLAGS//-mtune=/-mcpu=}
456     CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
457 vapier 1.73 fi
458    
459 vapier 1.85 replace-cpu-flags k6-{2,3} k6
460     replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
461    
462     replace-cpu-flags pentium-mmx i586
463     replace-cpu-flags pentium{2,3,4} i686
464    
465     replace-cpu-flags ev6{7,8} ev6
466    
467 vapier 1.73 export CFLAGS CXXFLAGS
468     }

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