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Revision 1.91 - (hide annotations) (download)
Fri Jul 22 21:47:51 2005 UTC (9 years, 1 month ago) by vapier
Branch: MAIN
Changes since 1.90: +2 -1 lines
dont file -m{,no-}tls-direct-seg-refs flags #99896

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 vapier 1.91 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.90 2005/07/11 19:28:20 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 agriffis 1.90 -mieee -mieee-with-inexact \
92 vapier 1.91 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
93 vapier 1.87 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
94     -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
95     -mlive-g0 -mcmodel -mstack-bias -mno-stack-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 mr_bones_ 1.83 local x f fset
105 agriffis 1.61 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 1.82 -fPIC|-fpic|-fPIE|-fpie|-pie)
110     append-flags `test_flag -fno-pie`;;
111     -fstack-protector|-fstack-protector-all)
112     fstack-flags;;
113 solar 1.27 esac
114     done
115 vapier 1.36
116 agriffis 1.61 for fset in CFLAGS CXXFLAGS; do
117 agriffis 1.64 # Looping over the flags instead of using a global
118     # substitution ensures that we're working with flag atoms.
119     # Otherwise globs like -O* have the potential to wipe out the
120     # list of flags.
121 agriffis 1.61 for f in ${!fset}; do
122     for x in "$@"; do
123     # Note this should work with globs like -O*
124     [[ ${f} == ${x} ]] && continue 2
125     done
126     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
127     done
128     eval export ${fset}=\${new_${fset}\[*]}
129 verwilst 1.1 done
130 agriffis 1.61
131 vapier 1.36 return 0
132 verwilst 1.2 }
133    
134 vapier 1.40 filter-lfs-flags() {
135     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136     }
137    
138 vapier 1.48 append-lfs-flags() {
139     append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140     }
141    
142 vapier 1.18 append-flags() {
143 solar 1.82 [[ -z $* ]] && return 0
144 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
145     export CXXFLAGS="${CXXFLAGS} $*"
146     [ -n "`is-flag -fno-stack-protector`" -o \
147     -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
148 vapier 1.28 return 0
149 verwilst 1.1 }
150    
151 vapier 1.18 replace-flags() {
152 mr_bones_ 1.83 local f fset
153 agriffis 1.64 declare -a new_CFLAGS new_CXXFLAGS
154    
155     for fset in CFLAGS CXXFLAGS; do
156     # Looping over the flags instead of using a global
157     # substitution ensures that we're working with flag atoms.
158     # Otherwise globs like -O* have the potential to wipe out the
159     # list of flags.
160     for f in ${!fset}; do
161     # Note this should work with globs like -O*
162     [[ ${f} == ${1} ]] && f=${2}
163     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
164     done
165     eval export ${fset}=\${new_${fset}\[*]}
166     done
167    
168 vapier 1.28 return 0
169 danarmak 1.7 }
170    
171 vapier 1.37 replace-cpu-flags() {
172 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
173     while [ $# -gt 1 ] ; do
174 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
175     # ${oldcpu} prior to calling replace-flags
176 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
177     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
178     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
179     shift
180 vapier 1.37 done
181     return 0
182     }
183    
184 danarmak 1.7 is-flag() {
185 agriffis 1.58 local x
186    
187 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
188 agriffis 1.67 # Note this should work with globs like -mcpu=ultrasparc*
189     if [[ ${x} == ${1} ]]; then
190 azarah 1.8 echo true
191 vapier 1.18 return 0
192     fi
193 danarmak 1.7 done
194 vapier 1.18 return 1
195 verwilst 1.1 }
196 azarah 1.8
197 vapier 1.36 filter-mfpmath() {
198 agriffis 1.58 local orig_mfpmath new_math prune_math
199    
200 vapier 1.36 # save the original -mfpmath flag
201 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
202 vapier 1.36 # get the value of the current -mfpmath flag
203 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
204 vapier 1.36 # figure out which math values are to be removed
205 agriffis 1.58 prune_math=""
206 vapier 1.36 for prune_math in "$@" ; do
207     new_math="${new_math/ ${prune_math} / }"
208     done
209     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
210    
211     if [ -z "${new_math}" ] ; then
212     # if we're removing all user specified math values are
213     # slated for removal, then we just filter the flag
214     filter-flags ${orig_mfpmath}
215     else
216     # if we only want to filter some of the user specified
217     # math values, then we replace the current flag
218     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
219     fi
220     return 0
221     }
222    
223 azarah 1.8 strip-flags() {
224 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
225    
226 vapier 1.36 setup-allowed-flags
227    
228 azarah 1.8 local NEW_CFLAGS=""
229     local NEW_CXXFLAGS=""
230    
231 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
232 vapier 1.84 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
233 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234     fi
235    
236 agriffis 1.58 set -f # disable pathname expansion
237 azarah 1.8
238 agriffis 1.58 for x in ${CFLAGS}; do
239     for y in ${ALLOWED_FLAGS}; do
240 lostlogic 1.14 flag=${x%%=*}
241 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
242 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
243     break
244 azarah 1.8 fi
245     done
246     done
247    
248 agriffis 1.58 for x in ${CXXFLAGS}; do
249     for y in ${ALLOWED_FLAGS}; do
250 lostlogic 1.14 flag=${x%%=*}
251 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
252 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
253     break
254 azarah 1.8 fi
255     done
256     done
257 azarah 1.30
258     # In case we filtered out all optimization flags fallback to -O2
259     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
260     NEW_CFLAGS="${NEW_CFLAGS} -O2"
261     fi
262     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264     fi
265 azarah 1.8
266 agriffis 1.58 set +f # re-enable pathname expansion
267 azarah 1.8
268     export CFLAGS="${NEW_CFLAGS}"
269     export CXXFLAGS="${NEW_CXXFLAGS}"
270 vapier 1.36 return 0
271 puggy 1.29 }
272    
273 vapier 1.36 test_flag() {
274 vapier 1.75 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
275 agriffis 1.58 printf "%s\n" "$*"
276 vapier 1.36 return 0
277 puggy 1.29 fi
278 vapier 1.36 return 1
279 puggy 1.29 }
280    
281 agriffis 1.58 test_version_info() {
282 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 agriffis 1.58 return 0
284     else
285     return 1
286     fi
287     }
288    
289 puggy 1.29 strip-unsupported-flags() {
290 agriffis 1.58 local NEW_CFLAGS NEW_CXXFLAGS
291    
292 vapier 1.36 for x in ${CFLAGS} ; do
293 agriffis 1.58 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
294 puggy 1.29 done
295 vapier 1.36 for x in ${CXXFLAGS} ; do
296 agriffis 1.58 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
297 puggy 1.29 done
298    
299 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
300     export CXXFLAGS="${NEW_CXXFLAGS}"
301 azarah 1.8 }
302    
303 vapier 1.10 get-flag() {
304 agriffis 1.58 local f findflag="$1"
305    
306 vapier 1.36 # this code looks a little flaky but seems to work for
307     # everything we want ...
308     # for example, if CFLAGS="-march=i686":
309 agriffis 1.58 # `get-flag -march` == "-march=i686"
310     # `get-flag march` == "i686"
311 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
312     if [ "${f/${findflag}}" != "${f}" ] ; then
313 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
314 vapier 1.28 return 0
315 vapier 1.10 fi
316     done
317 vapier 1.28 return 1
318 joker 1.16 }
319    
320 solar 1.53 has_hardened() {
321 lv 1.69 test_version_info Hardened && return 0
322     # the specs file wont exist unless gcc has GCC_SPECS support
323     [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
324     return 0
325     return 1
326 solar 1.53 }
327    
328 solar 1.81 # indicate whether PIC is set
329 tseng 1.42 has_pic() {
330     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
331     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
332 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
333 tseng 1.42 return 1
334     }
335    
336 solar 1.81 # indicate whether PIE is set
337 mr_bones_ 1.83 has_pie() {
338 tseng 1.43 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
339     [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
340 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
341     # test PIC while waiting for specs to be updated to generate __PIE__
342     [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
343 tseng 1.42 return 1
344     }
345 mr_bones_ 1.83
346 solar 1.86 # indicate whether code for SSP is being generated for all functions
347     has_ssp_all() {
348     # note; this matches only -fstack-protector-all
349     [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
350     [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
351     return 1
352     }
353    
354 solar 1.81 # indicate whether code for SSP is being generated
355 tseng 1.42 has_ssp() {
356 solar 1.81 # note; this matches both -fstack-protector and -fstack-protector-all
357 tseng 1.42 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
358 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
359 tseng 1.42 return 1
360     }
361    
362 lv 1.56 has_m64() {
363 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
364     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
365     # please dont replace this function with test_flag in some future
366     # clean-up!
367 vapier 1.72 local temp="$(emktemp)"
368 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
369 kugelfang 1.74 MY_CC=$(tc-getCC)
370     ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
371 vapier 1.72 local ret=$?
372 lv 1.62 rm -f ${temp}.c
373     [ "$ret" != "1" ] && return 0
374     return 1
375 lv 1.56 }
376    
377     has_m32() {
378 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
379     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
380     # please dont replace this function with test_flag in some future
381     # clean-up!
382 eradicator 1.80
383     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
384    
385 vapier 1.72 local temp="$(emktemp)"
386 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
387 kugelfang 1.74 MY_CC=$(tc-getCC)
388     ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
389 vapier 1.72 local ret=$?
390 lv 1.62 rm -f ${temp}.c
391     [ "$ret" != "1" ] && return 0
392     return 1
393 lv 1.56 }
394    
395 vapier 1.18 replace-sparc64-flags() {
396 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
397    
398 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
399 agriffis 1.58 for x in ${SPARC64_CPUS}; do
400 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
401     done
402 mr_bones_ 1.83 else
403 agriffis 1.58 for x in ${SPARC64_CPUS}; do
404 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
405     done
406     fi
407 mr_bones_ 1.83
408     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
409 agriffis 1.58 for x in ${SPARC64_CPUS}; do
410 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
411     done
412     else
413 agriffis 1.58 for x in ${SPARC64_CPUS}; do
414 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
415     done
416     fi
417 vapier 1.59
418     export CFLAGS CXXFLAGS
419 solar 1.27 }
420    
421     append-ldflags() {
422 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
423 vapier 1.28 return 0
424 solar 1.27 }
425    
426 solar 1.41 filter-ldflags() {
427 agriffis 1.58 local x
428    
429 solar 1.41 # we do this fancy spacing stuff so as to not filter
430     # out part of a flag ... we want flag atoms ! :D
431     LDFLAGS=" ${LDFLAGS} "
432     for x in "$@" ; do
433 vapier 1.84 LDFLAGS=${LDFLAGS// ${x} / }
434 solar 1.41 done
435 vapier 1.84 [[ -z ${LDFLAGS// } ]] \
436     && LDFLAGS="" \
437     || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
438 vapier 1.59 export LDFLAGS
439 solar 1.41 return 0
440     }
441    
442 solar 1.27 fstack-flags() {
443 agriffis 1.58 if has_ssp; then
444 mr_bones_ 1.83 [ -z "`is-flag -fno-stack-protector`" ] &&
445 agriffis 1.58 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
446 solar 1.35 fi
447 agriffis 1.58 return 0
448 vapier 1.10 }
449 vapier 1.73
450     # This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
451     # bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
452     # fixes.
453     #
454     # Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
455     gcc2-flags() {
456 vapier 1.85 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
457     CFLAGS=${CFLAGS//-mtune=/-mcpu=}
458     CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
459 vapier 1.73 fi
460    
461 vapier 1.85 replace-cpu-flags k6-{2,3} k6
462     replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
463    
464     replace-cpu-flags pentium-mmx i586
465     replace-cpu-flags pentium{2,3,4} i686
466    
467     replace-cpu-flags ev6{7,8} ev6
468    
469 vapier 1.73 export CFLAGS CXXFLAGS
470     }

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