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Revision 1.90 - (hide annotations) (download)
Mon Jul 11 19:28:20 2005 UTC (9 years, 1 month ago) by agriffis
Branch: MAIN
Changes since 1.89: +2 -1 lines
Add -mieee -mieee-with-inexact to ALLOWED_FLAGS, esp. for alpha

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 1.90 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.89 2005/07/06 20:23:20 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 1.87 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
93     -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
94     -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
95 vapier 1.36
96     # C[XX]FLAGS that we are think is ok, but needs testing
97     # NOTE: currently -Os have issues with gcc3 and K6* arch's
98     export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
99     return 0
100 aliz 1.24 }
101 verwilst 1.13
102 vapier 1.18 filter-flags() {
103 mr_bones_ 1.83 local x f fset
104 agriffis 1.61 declare -a new_CFLAGS new_CXXFLAGS
105 agriffis 1.58
106 vapier 1.36 for x in "$@" ; do
107 solar 1.27 case "${x}" in
108 solar 1.82 -fPIC|-fpic|-fPIE|-fpie|-pie)
109     append-flags `test_flag -fno-pie`;;
110     -fstack-protector|-fstack-protector-all)
111     fstack-flags;;
112 solar 1.27 esac
113     done
114 vapier 1.36
115 agriffis 1.61 for fset in CFLAGS CXXFLAGS; do
116 agriffis 1.64 # Looping over the flags instead of using a global
117     # substitution ensures that we're working with flag atoms.
118     # Otherwise globs like -O* have the potential to wipe out the
119     # list of flags.
120 agriffis 1.61 for f in ${!fset}; do
121     for x in "$@"; do
122     # Note this should work with globs like -O*
123     [[ ${f} == ${x} ]] && continue 2
124     done
125     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
126     done
127     eval export ${fset}=\${new_${fset}\[*]}
128 verwilst 1.1 done
129 agriffis 1.61
130 vapier 1.36 return 0
131 verwilst 1.2 }
132    
133 vapier 1.40 filter-lfs-flags() {
134     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135     }
136    
137 vapier 1.48 append-lfs-flags() {
138     append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
139     }
140    
141 vapier 1.18 append-flags() {
142 solar 1.82 [[ -z $* ]] && return 0
143 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
144     export CXXFLAGS="${CXXFLAGS} $*"
145     [ -n "`is-flag -fno-stack-protector`" -o \
146     -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
147 vapier 1.28 return 0
148 verwilst 1.1 }
149    
150 vapier 1.18 replace-flags() {
151 mr_bones_ 1.83 local f fset
152 agriffis 1.64 declare -a new_CFLAGS new_CXXFLAGS
153    
154     for fset in CFLAGS CXXFLAGS; do
155     # Looping over the flags instead of using a global
156     # substitution ensures that we're working with flag atoms.
157     # Otherwise globs like -O* have the potential to wipe out the
158     # list of flags.
159     for f in ${!fset}; do
160     # Note this should work with globs like -O*
161     [[ ${f} == ${1} ]] && f=${2}
162     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
163     done
164     eval export ${fset}=\${new_${fset}\[*]}
165     done
166    
167 vapier 1.28 return 0
168 danarmak 1.7 }
169    
170 vapier 1.37 replace-cpu-flags() {
171 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
172     while [ $# -gt 1 ] ; do
173 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
174     # ${oldcpu} prior to calling replace-flags
175 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
176     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178     shift
179 vapier 1.37 done
180     return 0
181     }
182    
183 danarmak 1.7 is-flag() {
184 agriffis 1.58 local x
185    
186 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
187 agriffis 1.67 # Note this should work with globs like -mcpu=ultrasparc*
188     if [[ ${x} == ${1} ]]; then
189 azarah 1.8 echo true
190 vapier 1.18 return 0
191     fi
192 danarmak 1.7 done
193 vapier 1.18 return 1
194 verwilst 1.1 }
195 azarah 1.8
196 vapier 1.36 filter-mfpmath() {
197 agriffis 1.58 local orig_mfpmath new_math prune_math
198    
199 vapier 1.36 # save the original -mfpmath flag
200 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
201 vapier 1.36 # get the value of the current -mfpmath flag
202 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
203 vapier 1.36 # figure out which math values are to be removed
204 agriffis 1.58 prune_math=""
205 vapier 1.36 for prune_math in "$@" ; do
206     new_math="${new_math/ ${prune_math} / }"
207     done
208     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
209    
210     if [ -z "${new_math}" ] ; then
211     # if we're removing all user specified math values are
212     # slated for removal, then we just filter the flag
213     filter-flags ${orig_mfpmath}
214     else
215     # if we only want to filter some of the user specified
216     # math values, then we replace the current flag
217     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218     fi
219     return 0
220     }
221    
222 azarah 1.8 strip-flags() {
223 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
224    
225 vapier 1.36 setup-allowed-flags
226    
227 azarah 1.8 local NEW_CFLAGS=""
228     local NEW_CXXFLAGS=""
229    
230 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
231 vapier 1.84 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
232 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
233     fi
234    
235 agriffis 1.58 set -f # disable pathname expansion
236 azarah 1.8
237 agriffis 1.58 for x in ${CFLAGS}; do
238     for y in ${ALLOWED_FLAGS}; do
239 lostlogic 1.14 flag=${x%%=*}
240 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
241 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
242     break
243 azarah 1.8 fi
244     done
245     done
246    
247 agriffis 1.58 for x in ${CXXFLAGS}; do
248     for y in ${ALLOWED_FLAGS}; do
249 lostlogic 1.14 flag=${x%%=*}
250 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
251 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
252     break
253 azarah 1.8 fi
254     done
255     done
256 azarah 1.30
257     # In case we filtered out all optimization flags fallback to -O2
258     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
259     NEW_CFLAGS="${NEW_CFLAGS} -O2"
260     fi
261     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
262     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
263     fi
264 azarah 1.8
265 agriffis 1.58 set +f # re-enable pathname expansion
266 azarah 1.8
267     export CFLAGS="${NEW_CFLAGS}"
268     export CXXFLAGS="${NEW_CXXFLAGS}"
269 vapier 1.36 return 0
270 puggy 1.29 }
271    
272 vapier 1.36 test_flag() {
273 vapier 1.75 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
274 agriffis 1.58 printf "%s\n" "$*"
275 vapier 1.36 return 0
276 puggy 1.29 fi
277 vapier 1.36 return 1
278 puggy 1.29 }
279    
280 agriffis 1.58 test_version_info() {
281 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
282 agriffis 1.58 return 0
283     else
284     return 1
285     fi
286     }
287    
288 puggy 1.29 strip-unsupported-flags() {
289 agriffis 1.58 local NEW_CFLAGS NEW_CXXFLAGS
290    
291 vapier 1.36 for x in ${CFLAGS} ; do
292 agriffis 1.58 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
293 puggy 1.29 done
294 vapier 1.36 for x in ${CXXFLAGS} ; do
295 agriffis 1.58 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
296 puggy 1.29 done
297    
298 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
299     export CXXFLAGS="${NEW_CXXFLAGS}"
300 azarah 1.8 }
301    
302 vapier 1.10 get-flag() {
303 agriffis 1.58 local f findflag="$1"
304    
305 vapier 1.36 # this code looks a little flaky but seems to work for
306     # everything we want ...
307     # for example, if CFLAGS="-march=i686":
308 agriffis 1.58 # `get-flag -march` == "-march=i686"
309     # `get-flag march` == "i686"
310 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
311     if [ "${f/${findflag}}" != "${f}" ] ; then
312 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
313 vapier 1.28 return 0
314 vapier 1.10 fi
315     done
316 vapier 1.28 return 1
317 joker 1.16 }
318    
319 solar 1.53 has_hardened() {
320 lv 1.69 test_version_info Hardened && return 0
321     # the specs file wont exist unless gcc has GCC_SPECS support
322     [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
323     return 0
324     return 1
325 solar 1.53 }
326    
327 solar 1.81 # indicate whether PIC is set
328 tseng 1.42 has_pic() {
329     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
330     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
332 tseng 1.42 return 1
333     }
334    
335 solar 1.81 # indicate whether PIE is set
336 mr_bones_ 1.83 has_pie() {
337 tseng 1.43 [ "${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) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
342 tseng 1.42 return 1
343     }
344 mr_bones_ 1.83
345 solar 1.86 # indicate whether code for SSP is being generated for all functions
346     has_ssp_all() {
347     # note; this matches only -fstack-protector-all
348     [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
349     [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
350     return 1
351     }
352    
353 solar 1.81 # indicate whether code for SSP is being generated
354 tseng 1.42 has_ssp() {
355 solar 1.81 # note; this matches both -fstack-protector and -fstack-protector-all
356 tseng 1.42 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
357 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
358 tseng 1.42 return 1
359     }
360    
361 lv 1.56 has_m64() {
362 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
363     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
364     # please dont replace this function with test_flag in some future
365     # clean-up!
366 vapier 1.72 local temp="$(emktemp)"
367 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
368 kugelfang 1.74 MY_CC=$(tc-getCC)
369     ${MY_CC/ .*/} -m64 -o "$(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     has_m32() {
377 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
378     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
379     # please dont replace this function with test_flag in some future
380     # clean-up!
381 eradicator 1.80
382     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
383    
384 vapier 1.72 local temp="$(emktemp)"
385 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
386 kugelfang 1.74 MY_CC=$(tc-getCC)
387     ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
388 vapier 1.72 local ret=$?
389 lv 1.62 rm -f ${temp}.c
390     [ "$ret" != "1" ] && return 0
391     return 1
392 lv 1.56 }
393    
394 vapier 1.18 replace-sparc64-flags() {
395 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
396    
397 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
398 agriffis 1.58 for x in ${SPARC64_CPUS}; do
399 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
400     done
401 mr_bones_ 1.83 else
402 agriffis 1.58 for x in ${SPARC64_CPUS}; do
403 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
404     done
405     fi
406 mr_bones_ 1.83
407     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
408 agriffis 1.58 for x in ${SPARC64_CPUS}; do
409 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
410     done
411     else
412 agriffis 1.58 for x in ${SPARC64_CPUS}; do
413 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
414     done
415     fi
416 vapier 1.59
417     export CFLAGS CXXFLAGS
418 solar 1.27 }
419    
420     append-ldflags() {
421 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
422 vapier 1.28 return 0
423 solar 1.27 }
424    
425 solar 1.41 filter-ldflags() {
426 agriffis 1.58 local x
427    
428 solar 1.41 # we do this fancy spacing stuff so as to not filter
429     # out part of a flag ... we want flag atoms ! :D
430     LDFLAGS=" ${LDFLAGS} "
431     for x in "$@" ; do
432 vapier 1.84 LDFLAGS=${LDFLAGS// ${x} / }
433 solar 1.41 done
434 vapier 1.84 [[ -z ${LDFLAGS// } ]] \
435     && LDFLAGS="" \
436     || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
437 vapier 1.59 export LDFLAGS
438 solar 1.41 return 0
439     }
440    
441 solar 1.27 fstack-flags() {
442 agriffis 1.58 if has_ssp; then
443 mr_bones_ 1.83 [ -z "`is-flag -fno-stack-protector`" ] &&
444 agriffis 1.58 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
445 solar 1.35 fi
446 agriffis 1.58 return 0
447 vapier 1.10 }
448 vapier 1.73
449     # This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
450     # bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
451     # fixes.
452     #
453     # Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
454     gcc2-flags() {
455 vapier 1.85 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
456     CFLAGS=${CFLAGS//-mtune=/-mcpu=}
457     CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
458 vapier 1.73 fi
459    
460 vapier 1.85 replace-cpu-flags k6-{2,3} k6
461     replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
462    
463     replace-cpu-flags pentium-mmx i586
464     replace-cpu-flags pentium{2,3,4} i686
465    
466     replace-cpu-flags ev6{7,8} ev6
467    
468 vapier 1.73 export CFLAGS CXXFLAGS
469     }

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