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Revision 1.64 - (hide annotations) (download)
Thu Jul 22 15:29:10 2004 UTC (9 years, 11 months ago) by agriffis
Branch: MAIN
Changes since 1.63: +29 -14 lines
update replace-flags to use atom code from filter-flags, related to #42006.  Also add ${IUSE} to IUSE for the sake of portage .50 users, which is basically all of them at the moment

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 agriffis 1.64 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.63 2004/07/18 04:59:30 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     ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83     esac
84     fi
85 vapier 1.36
86     # C[XX]FLAGS that we are think is ok, but needs testing
87     # NOTE: currently -Os have issues with gcc3 and K6* arch's
88     export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
89     return 0
90 aliz 1.24 }
91 verwilst 1.13
92 vapier 1.18 filter-flags() {
93 agriffis 1.61 local x f fset
94     declare -a new_CFLAGS new_CXXFLAGS
95 agriffis 1.58
96 vapier 1.36 for x in "$@" ; do
97 solar 1.27 case "${x}" in
98 solar 1.39 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
99 solar 1.32 -fstack-protector|-fstack-protector-all) fstack-flags;;
100 solar 1.27 esac
101     done
102 vapier 1.36
103 agriffis 1.61 for fset in CFLAGS CXXFLAGS; do
104 agriffis 1.64 # Looping over the flags instead of using a global
105     # substitution ensures that we're working with flag atoms.
106     # Otherwise globs like -O* have the potential to wipe out the
107     # list of flags.
108 agriffis 1.61 for f in ${!fset}; do
109     for x in "$@"; do
110     # Note this should work with globs like -O*
111     [[ ${f} == ${x} ]] && continue 2
112     done
113     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
114     done
115     eval export ${fset}=\${new_${fset}\[*]}
116 verwilst 1.1 done
117 agriffis 1.61
118 vapier 1.36 return 0
119 verwilst 1.2 }
120    
121 vapier 1.40 filter-lfs-flags() {
122     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
123     }
124    
125 vapier 1.48 append-lfs-flags() {
126     append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127     }
128    
129 vapier 1.18 append-flags() {
130 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
131     export CXXFLAGS="${CXXFLAGS} $*"
132     [ -n "`is-flag -fno-stack-protector`" -o \
133     -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
134 vapier 1.28 return 0
135 verwilst 1.1 }
136    
137 vapier 1.18 replace-flags() {
138 agriffis 1.64 local f fset
139     declare -a new_CFLAGS new_CXXFLAGS
140    
141     for fset in CFLAGS CXXFLAGS; do
142     # Looping over the flags instead of using a global
143     # substitution ensures that we're working with flag atoms.
144     # Otherwise globs like -O* have the potential to wipe out the
145     # list of flags.
146     for f in ${!fset}; do
147     # Note this should work with globs like -O*
148     [[ ${f} == ${1} ]] && f=${2}
149     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
150     done
151     eval export ${fset}=\${new_${fset}\[*]}
152     done
153    
154 vapier 1.28 return 0
155 danarmak 1.7 }
156    
157 vapier 1.37 replace-cpu-flags() {
158 agriffis 1.58 local oldcpu newcpu="$1" ; shift
159 vapier 1.37 for oldcpu in "$@" ; do
160 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
161     # ${oldcpu} prior to calling replace-flags
162     replace-flags "-march=${oldcpu}" "-march=${newcpu}"
163     replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}"
164     replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}"
165 vapier 1.37 done
166     return 0
167     }
168    
169 danarmak 1.7 is-flag() {
170 agriffis 1.58 local x
171    
172 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
173     if [ "${x}" == "$1" ] ; then
174 azarah 1.8 echo true
175 vapier 1.18 return 0
176     fi
177 danarmak 1.7 done
178 vapier 1.18 return 1
179 verwilst 1.1 }
180 azarah 1.8
181 vapier 1.36 filter-mfpmath() {
182 agriffis 1.58 local orig_mfpmath new_math prune_math
183    
184 vapier 1.36 # save the original -mfpmath flag
185 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
186 vapier 1.36 # get the value of the current -mfpmath flag
187 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
188 vapier 1.36 # figure out which math values are to be removed
189 agriffis 1.58 prune_math=""
190 vapier 1.36 for prune_math in "$@" ; do
191     new_math="${new_math/ ${prune_math} / }"
192     done
193     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
194    
195     if [ -z "${new_math}" ] ; then
196     # if we're removing all user specified math values are
197     # slated for removal, then we just filter the flag
198     filter-flags ${orig_mfpmath}
199     else
200     # if we only want to filter some of the user specified
201     # math values, then we replace the current flag
202     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
203     fi
204     return 0
205     }
206    
207 azarah 1.8 strip-flags() {
208 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
209    
210 vapier 1.36 setup-allowed-flags
211    
212 azarah 1.8 local NEW_CFLAGS=""
213     local NEW_CXXFLAGS=""
214    
215 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
216 vapier 1.49 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
217     use debug && einfo "Enabling the use of some unstable flags"
218 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
219     fi
220    
221 agriffis 1.58 set -f # disable pathname expansion
222 azarah 1.8
223 agriffis 1.58 for x in ${CFLAGS}; do
224     for y in ${ALLOWED_FLAGS}; do
225 lostlogic 1.14 flag=${x%%=*}
226 vapier 1.63 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then
227 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
228     break
229 azarah 1.8 fi
230     done
231     done
232    
233 agriffis 1.58 for x in ${CXXFLAGS}; do
234     for y in ${ALLOWED_FLAGS}; do
235 lostlogic 1.14 flag=${x%%=*}
236 vapier 1.63 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then
237 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
238     break
239 azarah 1.8 fi
240     done
241     done
242 azarah 1.30
243     # In case we filtered out all optimization flags fallback to -O2
244     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
245     NEW_CFLAGS="${NEW_CFLAGS} -O2"
246     fi
247     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
248     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
249     fi
250 azarah 1.8
251 agriffis 1.58 set +f # re-enable pathname expansion
252 azarah 1.8
253     export CFLAGS="${NEW_CFLAGS}"
254     export CXXFLAGS="${NEW_CXXFLAGS}"
255 vapier 1.36 return 0
256 puggy 1.29 }
257    
258 vapier 1.36 test_flag() {
259 agriffis 1.58 local cc=${CC:-gcc} ; cc=${cc%% *}
260     if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
261     printf "%s\n" "$*"
262 vapier 1.36 return 0
263 puggy 1.29 fi
264 vapier 1.36 return 1
265 puggy 1.29 }
266    
267 agriffis 1.58 test_version_info() {
268     local cc=${CC:-gcc} ; cc=${cc%% *}
269     if [[ $(${cc} --version 2>&1) == *$1* ]]; then
270     return 0
271     else
272     return 1
273     fi
274     }
275    
276 puggy 1.29 strip-unsupported-flags() {
277 agriffis 1.58 local NEW_CFLAGS NEW_CXXFLAGS
278    
279 vapier 1.36 for x in ${CFLAGS} ; do
280 agriffis 1.58 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
281 puggy 1.29 done
282 vapier 1.36 for x in ${CXXFLAGS} ; do
283 agriffis 1.58 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
284 puggy 1.29 done
285    
286 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
287     export CXXFLAGS="${NEW_CXXFLAGS}"
288 azarah 1.8 }
289    
290 vapier 1.10 get-flag() {
291 agriffis 1.58 local f findflag="$1"
292    
293 vapier 1.36 # this code looks a little flaky but seems to work for
294     # everything we want ...
295     # for example, if CFLAGS="-march=i686":
296 agriffis 1.58 # `get-flag -march` == "-march=i686"
297     # `get-flag march` == "i686"
298 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
299     if [ "${f/${findflag}}" != "${f}" ] ; then
300 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
301 vapier 1.28 return 0
302 vapier 1.10 fi
303     done
304 vapier 1.28 return 1
305 joker 1.16 }
306    
307 solar 1.53 has_hardened() {
308 agriffis 1.58 test_version_info Hardened
309 solar 1.53 return $?
310     }
311    
312 tseng 1.42 has_pic() {
313     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
314     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
315 agriffis 1.58 test_version_info pie && return 0
316 tseng 1.42 return 1
317     }
318    
319     has_pie() {
320 tseng 1.43 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
321     [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
322 agriffis 1.58 test_version_info pie && return 0
323 tseng 1.42 return 1
324     }
325    
326     has_ssp() {
327     [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
328 agriffis 1.58 test_version_info ssp && return 0
329 tseng 1.42 return 1
330     }
331    
332 lv 1.56 has_m64() {
333 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
334     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
335     # please dont replace this function with test_flag in some future
336     # clean-up!
337     temp=`mktemp`
338     echo "int main() { return(0); }" > ${temp}.c
339     ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
340     ret=$?
341     rm -f ${temp}.c
342     [ "$ret" != "1" ] && return 0
343     return 1
344 lv 1.56 }
345    
346     has_m32() {
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     temp=`mktemp`
352     echo "int main() { return(0); }" > ${temp}.c
353     ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
354     ret=$?
355     rm -f ${temp}.c
356     [ "$ret" != "1" ] && return 0
357     return 1
358 lv 1.56 }
359    
360 vapier 1.18 replace-sparc64-flags() {
361 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
362    
363 agriffis 1.58 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
364     for x in ${SPARC64_CPUS}; do
365 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
366     done
367     else
368 agriffis 1.58 for x in ${SPARC64_CPUS}; do
369 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
370     done
371     fi
372    
373 agriffis 1.58 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
374     for x in ${SPARC64_CPUS}; do
375 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
376     done
377     else
378 agriffis 1.58 for x in ${SPARC64_CPUS}; do
379 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
380     done
381     fi
382 vapier 1.59
383     export CFLAGS CXXFLAGS
384 solar 1.27 }
385    
386     append-ldflags() {
387 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
388 vapier 1.28 return 0
389 solar 1.27 }
390    
391 solar 1.41 filter-ldflags() {
392 agriffis 1.58 local x
393    
394 solar 1.41 # we do this fancy spacing stuff so as to not filter
395     # out part of a flag ... we want flag atoms ! :D
396     LDFLAGS=" ${LDFLAGS} "
397     for x in "$@" ; do
398     LDFLAGS="${LDFLAGS// ${x} / }"
399     done
400     LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
401 vapier 1.59 export LDFLAGS
402 solar 1.41 return 0
403     }
404    
405 vapier 1.36 etexec-flags() {
406 agriffis 1.58 # if you're not using a hardened compiler you wont need this
407 solar 1.53 # PIC/no-pic kludge in the first place.
408 agriffis 1.58 has_hardened || return 0
409 pappy 1.50
410 agriffis 1.58 if has_pie || has_pic; then
411     [ -z "`is-flag -fno-pic`" ] &&
412     export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
413     [ -z "`is-flag -nopie`" ] &&
414     export CFLAGS="${CFLAGS} `test_flag -nopie`"
415 solar 1.35 fi
416 agriffis 1.58 return 0
417 solar 1.27 }
418    
419     fstack-flags() {
420 agriffis 1.58 if has_ssp; then
421     [ -z "`is-flag -fno-stack-protector`" ] &&
422     export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
423 solar 1.35 fi
424 agriffis 1.58 return 0
425 vapier 1.10 }

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