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Revision 1.66 - (hide annotations) (download)
Wed Jul 28 02:18:38 2004 UTC (9 years, 8 months ago) by lv
Branch: MAIN
Changes since 1.65: +4 -1 lines
cockblock amd64 from the -fno-pic logic, as it will randomly break stuff

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 lv 1.66 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.65 2004/07/27 19:25:49 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 verwilst 1.2 #
15 vapier 1.18 #### filter-flags <flags> ####
16 verwilst 1.3 # Remove particular flags from C[XX]FLAGS
17 vapier 1.18 # Matches only complete flags
18 verwilst 1.2 #
19 vapier 1.18 #### append-flags <flags> ####
20 verwilst 1.3 # Add extra flags to your current C[XX]FLAGS
21     #
22 verwilst 1.4 #### replace-flags <orig.flag> <new.flag> ###
23 verwilst 1.3 # Replace a flag by another one
24     #
25 vapier 1.37 #### replace-cpu-flags <new.cpu> <old.cpus> ###
26     # Replace march/mcpu flags that specify <old.cpus>
27     # with flags that specify <new.cpu>
28     #
29 danarmak 1.7 #### is-flag <flag> ####
30     # Returns "true" if flag is set in C[XX]FLAGS
31 vapier 1.18 # Matches only complete a flag
32 danarmak 1.7 #
33 azarah 1.8 #### strip-flags ####
34     # Strip C[XX]FLAGS of everything except known
35     # good options.
36     #
37 puggy 1.29 #### strip-unsupported-flags ####
38     # Strip C[XX]FLAGS of any flags not supported by
39     # installed version of gcc
40     #
41 vapier 1.10 #### get-flag <flag> ####
42     # Find and echo the value for a particular flag
43     #
44 joker 1.16 #### replace-sparc64-flags ####
45     # Sets mcpu to v8 and uses the original value
46     # as mtune if none specified.
47     #
48 vapier 1.26 #### filter-mfpmath <math types> ####
49     # Remove specified math types from the fpmath specification
50     # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
51     # will leave the user with -mfpmath=386
52 solar 1.27 #
53     #### append-ldflags ####
54     # Add extra flags to your current LDFLAGS
55     #
56 solar 1.41 #### filter-ldflags <flags> ####
57     # Remove particular flags from LDFLAGS
58     # Matches only complete flags
59     #
60 solar 1.27 #### etexec-flags ####
61 pappy 1.50 # hooked function for hardened gcc that appends
62     # -fno-pic to {C,CXX,LD}FLAGS
63     # when a package is filtering -fpic, -fPIC, -fpie, -fPIE
64 solar 1.27 #
65     #### fstack-flags ####
66 pappy 1.50 # hooked function for hardened gcc that appends
67     # -fno-stack-protector to {C,CXX,LD}FLAGS
68     # when a package is filtering -fstack-protector, -fstack-protector-all
69     # notice: modern automatic specs files will also suppress -fstack-protector-all
70     # when only -fno-stack-protector is given
71 solar 1.27 #
72 verwilst 1.3
73 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
74 vapier 1.36 setup-allowed-flags() {
75 vapier 1.44 if [ -z "${ALLOWED_FLAGS}" ] ; then
76 lv 1.52 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
77 vapier 1.44 case "${ARCH}" in
78     mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
79 lv 1.51 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
80     x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
81 vapier 1.44 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
82 vapier 1.65 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83 vapier 1.44 esac
84     fi
85 vapier 1.65 # allow a bunch of flags that negate features / control ABI
86     ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
87     case "${ARCH}" in
88     x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
89     esac
90     ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
91 vapier 1.36
92     # C[XX]FLAGS that we are think is ok, but needs testing
93     # NOTE: currently -Os have issues with gcc3 and K6* arch's
94     export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
95     return 0
96 aliz 1.24 }
97 verwilst 1.13
98 vapier 1.18 filter-flags() {
99 agriffis 1.61 local x f fset
100     declare -a new_CFLAGS new_CXXFLAGS
101 agriffis 1.58
102 vapier 1.36 for x in "$@" ; do
103 solar 1.27 case "${x}" in
104 solar 1.39 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
105 solar 1.32 -fstack-protector|-fstack-protector-all) fstack-flags;;
106 solar 1.27 esac
107     done
108 vapier 1.36
109 agriffis 1.61 for fset in CFLAGS CXXFLAGS; do
110 agriffis 1.64 # Looping over the flags instead of using a global
111     # substitution ensures that we're working with flag atoms.
112     # Otherwise globs like -O* have the potential to wipe out the
113     # list of flags.
114 agriffis 1.61 for f in ${!fset}; do
115     for x in "$@"; do
116     # Note this should work with globs like -O*
117     [[ ${f} == ${x} ]] && continue 2
118     done
119     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
120     done
121     eval export ${fset}=\${new_${fset}\[*]}
122 verwilst 1.1 done
123 agriffis 1.61
124 vapier 1.36 return 0
125 verwilst 1.2 }
126    
127 vapier 1.40 filter-lfs-flags() {
128     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
129     }
130    
131 vapier 1.48 append-lfs-flags() {
132     append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
133     }
134    
135 vapier 1.18 append-flags() {
136 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
137     export CXXFLAGS="${CXXFLAGS} $*"
138     [ -n "`is-flag -fno-stack-protector`" -o \
139     -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
140 vapier 1.28 return 0
141 verwilst 1.1 }
142    
143 vapier 1.18 replace-flags() {
144 agriffis 1.64 local f fset
145     declare -a new_CFLAGS new_CXXFLAGS
146    
147     for fset in CFLAGS CXXFLAGS; do
148     # Looping over the flags instead of using a global
149     # substitution ensures that we're working with flag atoms.
150     # Otherwise globs like -O* have the potential to wipe out the
151     # list of flags.
152     for f in ${!fset}; do
153     # Note this should work with globs like -O*
154     [[ ${f} == ${1} ]] && f=${2}
155     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
156     done
157     eval export ${fset}=\${new_${fset}\[*]}
158     done
159    
160 vapier 1.28 return 0
161 danarmak 1.7 }
162    
163 vapier 1.37 replace-cpu-flags() {
164 agriffis 1.58 local oldcpu newcpu="$1" ; shift
165 vapier 1.37 for oldcpu in "$@" ; do
166 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
167     # ${oldcpu} prior to calling replace-flags
168     replace-flags "-march=${oldcpu}" "-march=${newcpu}"
169     replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}"
170     replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}"
171 vapier 1.37 done
172     return 0
173     }
174    
175 danarmak 1.7 is-flag() {
176 agriffis 1.58 local x
177    
178 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
179     if [ "${x}" == "$1" ] ; then
180 azarah 1.8 echo true
181 vapier 1.18 return 0
182     fi
183 danarmak 1.7 done
184 vapier 1.18 return 1
185 verwilst 1.1 }
186 azarah 1.8
187 vapier 1.36 filter-mfpmath() {
188 agriffis 1.58 local orig_mfpmath new_math prune_math
189    
190 vapier 1.36 # save the original -mfpmath flag
191 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
192 vapier 1.36 # get the value of the current -mfpmath flag
193 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
194 vapier 1.36 # figure out which math values are to be removed
195 agriffis 1.58 prune_math=""
196 vapier 1.36 for prune_math in "$@" ; do
197     new_math="${new_math/ ${prune_math} / }"
198     done
199     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
200    
201     if [ -z "${new_math}" ] ; then
202     # if we're removing all user specified math values are
203     # slated for removal, then we just filter the flag
204     filter-flags ${orig_mfpmath}
205     else
206     # if we only want to filter some of the user specified
207     # math values, then we replace the current flag
208     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
209     fi
210     return 0
211     }
212    
213 azarah 1.8 strip-flags() {
214 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
215    
216 vapier 1.36 setup-allowed-flags
217    
218 azarah 1.8 local NEW_CFLAGS=""
219     local NEW_CXXFLAGS=""
220    
221 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
222 vapier 1.49 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
223     use debug && einfo "Enabling the use of some unstable flags"
224 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
225     fi
226    
227 agriffis 1.58 set -f # disable pathname expansion
228 azarah 1.8
229 agriffis 1.58 for x in ${CFLAGS}; do
230     for y in ${ALLOWED_FLAGS}; do
231 lostlogic 1.14 flag=${x%%=*}
232 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
233 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
234     break
235 azarah 1.8 fi
236     done
237     done
238    
239 agriffis 1.58 for x in ${CXXFLAGS}; do
240     for y in ${ALLOWED_FLAGS}; do
241 lostlogic 1.14 flag=${x%%=*}
242 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
243 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
244     break
245 azarah 1.8 fi
246     done
247     done
248 azarah 1.30
249     # In case we filtered out all optimization flags fallback to -O2
250     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
251     NEW_CFLAGS="${NEW_CFLAGS} -O2"
252     fi
253     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
254     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
255     fi
256 azarah 1.8
257 agriffis 1.58 set +f # re-enable pathname expansion
258 azarah 1.8
259     export CFLAGS="${NEW_CFLAGS}"
260     export CXXFLAGS="${NEW_CXXFLAGS}"
261 vapier 1.36 return 0
262 puggy 1.29 }
263    
264 vapier 1.36 test_flag() {
265 agriffis 1.58 local cc=${CC:-gcc} ; cc=${cc%% *}
266     if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
267     printf "%s\n" "$*"
268 vapier 1.36 return 0
269 puggy 1.29 fi
270 vapier 1.36 return 1
271 puggy 1.29 }
272    
273 agriffis 1.58 test_version_info() {
274     local cc=${CC:-gcc} ; cc=${cc%% *}
275     if [[ $(${cc} --version 2>&1) == *$1* ]]; then
276     return 0
277     else
278     return 1
279     fi
280     }
281    
282 puggy 1.29 strip-unsupported-flags() {
283 agriffis 1.58 local NEW_CFLAGS NEW_CXXFLAGS
284    
285 vapier 1.36 for x in ${CFLAGS} ; do
286 agriffis 1.58 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
287 puggy 1.29 done
288 vapier 1.36 for x in ${CXXFLAGS} ; do
289 agriffis 1.58 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
290 puggy 1.29 done
291    
292 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
293     export CXXFLAGS="${NEW_CXXFLAGS}"
294 azarah 1.8 }
295    
296 vapier 1.10 get-flag() {
297 agriffis 1.58 local f findflag="$1"
298    
299 vapier 1.36 # this code looks a little flaky but seems to work for
300     # everything we want ...
301     # for example, if CFLAGS="-march=i686":
302 agriffis 1.58 # `get-flag -march` == "-march=i686"
303     # `get-flag march` == "i686"
304 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
305     if [ "${f/${findflag}}" != "${f}" ] ; then
306 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
307 vapier 1.28 return 0
308 vapier 1.10 fi
309     done
310 vapier 1.28 return 1
311 joker 1.16 }
312    
313 solar 1.53 has_hardened() {
314 agriffis 1.58 test_version_info Hardened
315 solar 1.53 return $?
316     }
317    
318 tseng 1.42 has_pic() {
319     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
320     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
321 agriffis 1.58 test_version_info pie && return 0
322 tseng 1.42 return 1
323     }
324    
325     has_pie() {
326 tseng 1.43 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
327     [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
328 agriffis 1.58 test_version_info pie && return 0
329 tseng 1.42 return 1
330     }
331    
332     has_ssp() {
333     [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
334 agriffis 1.58 test_version_info ssp && return 0
335 tseng 1.42 return 1
336     }
337    
338 lv 1.56 has_m64() {
339 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
340     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
341     # please dont replace this function with test_flag in some future
342     # clean-up!
343     temp=`mktemp`
344     echo "int main() { return(0); }" > ${temp}.c
345     ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
346     ret=$?
347     rm -f ${temp}.c
348     [ "$ret" != "1" ] && return 0
349     return 1
350 lv 1.56 }
351    
352     has_m32() {
353 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
354     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
355     # please dont replace this function with test_flag in some future
356     # clean-up!
357     temp=`mktemp`
358     echo "int main() { return(0); }" > ${temp}.c
359     ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
360     ret=$?
361     rm -f ${temp}.c
362     [ "$ret" != "1" ] && return 0
363     return 1
364 lv 1.56 }
365    
366 vapier 1.18 replace-sparc64-flags() {
367 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
368    
369 agriffis 1.58 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
370     for x in ${SPARC64_CPUS}; do
371 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
372     done
373     else
374 agriffis 1.58 for x in ${SPARC64_CPUS}; do
375 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
376     done
377     fi
378    
379 agriffis 1.58 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
380     for x in ${SPARC64_CPUS}; do
381 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
382     done
383     else
384 agriffis 1.58 for x in ${SPARC64_CPUS}; do
385 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
386     done
387     fi
388 vapier 1.59
389     export CFLAGS CXXFLAGS
390 solar 1.27 }
391    
392     append-ldflags() {
393 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
394 vapier 1.28 return 0
395 solar 1.27 }
396    
397 solar 1.41 filter-ldflags() {
398 agriffis 1.58 local x
399    
400 solar 1.41 # we do this fancy spacing stuff so as to not filter
401     # out part of a flag ... we want flag atoms ! :D
402     LDFLAGS=" ${LDFLAGS} "
403     for x in "$@" ; do
404     LDFLAGS="${LDFLAGS// ${x} / }"
405     done
406     LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
407 vapier 1.59 export LDFLAGS
408 solar 1.41 return 0
409     }
410    
411 vapier 1.36 etexec-flags() {
412 agriffis 1.58 # if you're not using a hardened compiler you wont need this
413 solar 1.53 # PIC/no-pic kludge in the first place.
414 agriffis 1.58 has_hardened || return 0
415 lv 1.66 # this kludge breaks on amd64, and probably other -fPIC dependant
416     # archs.
417     use amd64 && return 0
418 pappy 1.50
419 agriffis 1.58 if has_pie || has_pic; then
420     [ -z "`is-flag -fno-pic`" ] &&
421     export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
422     [ -z "`is-flag -nopie`" ] &&
423     export CFLAGS="${CFLAGS} `test_flag -nopie`"
424 solar 1.35 fi
425 agriffis 1.58 return 0
426 solar 1.27 }
427    
428     fstack-flags() {
429 agriffis 1.58 if has_ssp; then
430     [ -z "`is-flag -fno-stack-protector`" ] &&
431     export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
432 solar 1.35 fi
433 agriffis 1.58 return 0
434 vapier 1.10 }

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