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Revision 1.60 - (hide annotations) (download)
Fri Jun 25 00:39:48 2004 UTC (10 years, 2 months ago) by vapier
Branch: MAIN
Changes since 1.59: +2 -2 lines
update the copyright info

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 vapier 1.60 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.59 2004/06/25 00:18:04 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 $ECLASS"
9 lv 1.55 IUSE="$IUSE debug"
10 azarah 1.8
11 verwilst 1.2 #
12 vapier 1.18 #### filter-flags <flags> ####
13 verwilst 1.3 # Remove particular flags from C[XX]FLAGS
14 vapier 1.18 # Matches only complete flags
15 verwilst 1.2 #
16 vapier 1.18 #### append-flags <flags> ####
17 verwilst 1.3 # Add extra flags to your current C[XX]FLAGS
18     #
19 verwilst 1.4 #### replace-flags <orig.flag> <new.flag> ###
20 verwilst 1.3 # Replace a flag by another one
21     #
22 vapier 1.37 #### replace-cpu-flags <new.cpu> <old.cpus> ###
23     # Replace march/mcpu flags that specify <old.cpus>
24     # with flags that specify <new.cpu>
25     #
26 danarmak 1.7 #### is-flag <flag> ####
27     # Returns "true" if flag is set in C[XX]FLAGS
28 vapier 1.18 # Matches only complete a flag
29 danarmak 1.7 #
30 azarah 1.8 #### strip-flags ####
31     # Strip C[XX]FLAGS of everything except known
32     # good options.
33     #
34 puggy 1.29 #### strip-unsupported-flags ####
35     # Strip C[XX]FLAGS of any flags not supported by
36     # installed version of gcc
37     #
38 vapier 1.10 #### get-flag <flag> ####
39     # Find and echo the value for a particular flag
40     #
41 joker 1.16 #### replace-sparc64-flags ####
42     # Sets mcpu to v8 and uses the original value
43     # as mtune if none specified.
44     #
45 vapier 1.26 #### filter-mfpmath <math types> ####
46     # Remove specified math types from the fpmath specification
47     # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
48     # will leave the user with -mfpmath=386
49 solar 1.27 #
50     #### append-ldflags ####
51     # Add extra flags to your current LDFLAGS
52     #
53 solar 1.41 #### filter-ldflags <flags> ####
54     # Remove particular flags from LDFLAGS
55     # Matches only complete flags
56     #
57 solar 1.27 #### etexec-flags ####
58 pappy 1.50 # hooked function for hardened gcc that appends
59     # -fno-pic to {C,CXX,LD}FLAGS
60     # when a package is filtering -fpic, -fPIC, -fpie, -fPIE
61 solar 1.27 #
62     #### fstack-flags ####
63 pappy 1.50 # hooked function for hardened gcc that appends
64     # -fno-stack-protector to {C,CXX,LD}FLAGS
65     # when a package is filtering -fstack-protector, -fstack-protector-all
66     # notice: modern automatic specs files will also suppress -fstack-protector-all
67     # when only -fno-stack-protector is given
68 solar 1.27 #
69 verwilst 1.3
70 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
71 vapier 1.36 setup-allowed-flags() {
72 vapier 1.44 if [ -z "${ALLOWED_FLAGS}" ] ; then
73 lv 1.52 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
74 vapier 1.44 case "${ARCH}" in
75     mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
76 lv 1.51 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77     x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
78 vapier 1.44 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
79     ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
80     esac
81     fi
82 vapier 1.36
83     # C[XX]FLAGS that we are think is ok, but needs testing
84     # NOTE: currently -Os have issues with gcc3 and K6* arch's
85     export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86     return 0
87 aliz 1.24 }
88 verwilst 1.13
89 vapier 1.18 filter-flags() {
90 agriffis 1.58 local x
91    
92 vapier 1.36 for x in "$@" ; do
93 solar 1.27 case "${x}" in
94 solar 1.39 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
95 solar 1.32 -fstack-protector|-fstack-protector-all) fstack-flags;;
96 solar 1.27 *) ;;
97     esac
98     done
99 vapier 1.36
100 vapier 1.18 # we do this fancy spacing stuff so as to not filter
101     # out part of a flag ... we want flag atoms ! :D
102 agriffis 1.25 CFLAGS=" ${CFLAGS} "
103     CXXFLAGS=" ${CXXFLAGS} "
104 vapier 1.36 for x in "$@" ; do
105 vapier 1.37 CFLAGS="${CFLAGS// ${x} / }"
106     CXXFLAGS="${CXXFLAGS// ${x} / }"
107 verwilst 1.1 done
108 agriffis 1.25 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
109     CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
110 vapier 1.59 export CFLAGS CXXFLAGS
111 vapier 1.36 return 0
112 verwilst 1.2 }
113    
114 vapier 1.40 filter-lfs-flags() {
115     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
116     }
117    
118 vapier 1.48 append-lfs-flags() {
119     append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
120     }
121    
122 vapier 1.18 append-flags() {
123 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
124     export CXXFLAGS="${CXXFLAGS} $*"
125     [ -n "`is-flag -fno-stack-protector`" -o \
126     -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
127 vapier 1.28 return 0
128 verwilst 1.1 }
129    
130 vapier 1.18 replace-flags() {
131 vapier 1.36 # we do this fancy spacing stuff so as to not filter
132     # out part of a flag ... we want flag atoms ! :D
133     CFLAGS=" ${CFLAGS} "
134     CXXFLAGS=" ${CXXFLAGS} "
135 vapier 1.37 CFLAGS="${CFLAGS// ${1} / ${2} }"
136     CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
137 vapier 1.36 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
138     CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
139 vapier 1.59 export CFLAGS CXXFLAGS
140 vapier 1.28 return 0
141 danarmak 1.7 }
142    
143 vapier 1.37 replace-cpu-flags() {
144 agriffis 1.58 local oldcpu newcpu="$1" ; shift
145 vapier 1.37 for oldcpu in "$@" ; do
146     replace-flags -march=${oldcpu} -march=${newcpu}
147     replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
148 vapier 1.38 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
149 vapier 1.37 done
150     return 0
151     }
152    
153 danarmak 1.7 is-flag() {
154 agriffis 1.58 local x
155    
156 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
157     if [ "${x}" == "$1" ] ; then
158 azarah 1.8 echo true
159 vapier 1.18 return 0
160     fi
161 danarmak 1.7 done
162 vapier 1.18 return 1
163 verwilst 1.1 }
164 azarah 1.8
165 vapier 1.36 filter-mfpmath() {
166 agriffis 1.58 local orig_mfpmath new_math prune_math
167    
168 vapier 1.36 # save the original -mfpmath flag
169 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
170 vapier 1.36 # get the value of the current -mfpmath flag
171 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
172 vapier 1.36 # figure out which math values are to be removed
173 agriffis 1.58 prune_math=""
174 vapier 1.36 for prune_math in "$@" ; do
175     new_math="${new_math/ ${prune_math} / }"
176     done
177     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
178    
179     if [ -z "${new_math}" ] ; then
180     # if we're removing all user specified math values are
181     # slated for removal, then we just filter the flag
182     filter-flags ${orig_mfpmath}
183     else
184     # if we only want to filter some of the user specified
185     # math values, then we replace the current flag
186     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
187     fi
188     return 0
189     }
190    
191 azarah 1.8 strip-flags() {
192 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
193    
194 vapier 1.36 setup-allowed-flags
195    
196 azarah 1.8 local NEW_CFLAGS=""
197     local NEW_CXXFLAGS=""
198    
199 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
200 vapier 1.49 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
201     use debug && einfo "Enabling the use of some unstable flags"
202 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
203     fi
204    
205 agriffis 1.58 set -f # disable pathname expansion
206 azarah 1.8
207 agriffis 1.58 for x in ${CFLAGS}; do
208     for y in ${ALLOWED_FLAGS}; do
209 lostlogic 1.14 flag=${x%%=*}
210 agriffis 1.58 if [ "${flag%%${y}}" = "" ]; then
211 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
212     break
213 azarah 1.8 fi
214     done
215     done
216    
217 agriffis 1.58 for x in ${CXXFLAGS}; do
218     for y in ${ALLOWED_FLAGS}; do
219 lostlogic 1.14 flag=${x%%=*}
220 agriffis 1.58 if [ "${flag%%${y}}" = "" ]; then
221 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222     break
223 azarah 1.8 fi
224     done
225     done
226 azarah 1.30
227     # In case we filtered out all optimization flags fallback to -O2
228     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
229     NEW_CFLAGS="${NEW_CFLAGS} -O2"
230     fi
231     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
232     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
233     fi
234 azarah 1.8
235 agriffis 1.58 set +f # re-enable pathname expansion
236 azarah 1.8
237     export CFLAGS="${NEW_CFLAGS}"
238     export CXXFLAGS="${NEW_CXXFLAGS}"
239 vapier 1.36 return 0
240 puggy 1.29 }
241    
242 vapier 1.36 test_flag() {
243 agriffis 1.58 local cc=${CC:-gcc} ; cc=${cc%% *}
244     if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
245     printf "%s\n" "$*"
246 vapier 1.36 return 0
247 puggy 1.29 fi
248 vapier 1.36 return 1
249 puggy 1.29 }
250    
251 agriffis 1.58 test_version_info() {
252     local cc=${CC:-gcc} ; cc=${cc%% *}
253     if [[ $(${cc} --version 2>&1) == *$1* ]]; then
254     return 0
255     else
256     return 1
257     fi
258     }
259    
260 puggy 1.29 strip-unsupported-flags() {
261 agriffis 1.58 local NEW_CFLAGS NEW_CXXFLAGS
262    
263 vapier 1.36 for x in ${CFLAGS} ; do
264 agriffis 1.58 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
265 puggy 1.29 done
266 vapier 1.36 for x in ${CXXFLAGS} ; do
267 agriffis 1.58 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
268 puggy 1.29 done
269    
270 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
271     export CXXFLAGS="${NEW_CXXFLAGS}"
272 azarah 1.8 }
273    
274 vapier 1.10 get-flag() {
275 agriffis 1.58 local f findflag="$1"
276    
277 vapier 1.36 # this code looks a little flaky but seems to work for
278     # everything we want ...
279     # for example, if CFLAGS="-march=i686":
280 agriffis 1.58 # `get-flag -march` == "-march=i686"
281     # `get-flag march` == "i686"
282 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
283     if [ "${f/${findflag}}" != "${f}" ] ; then
284 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
285 vapier 1.28 return 0
286 vapier 1.10 fi
287     done
288 vapier 1.28 return 1
289 joker 1.16 }
290    
291 solar 1.53 has_hardened() {
292 agriffis 1.58 test_version_info Hardened
293 solar 1.53 return $?
294     }
295    
296 tseng 1.42 has_pic() {
297     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
298     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
299 agriffis 1.58 test_version_info pie && return 0
300 tseng 1.42 return 1
301     }
302    
303     has_pie() {
304 tseng 1.43 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
305     [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
306 agriffis 1.58 test_version_info pie && return 0
307 tseng 1.42 return 1
308     }
309    
310     has_ssp() {
311     [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
312 agriffis 1.58 test_version_info ssp && return 0
313 tseng 1.42 return 1
314     }
315    
316 lv 1.56 has_m64() {
317 agriffis 1.58 test_flag -m64
318     return $?
319 lv 1.56 }
320    
321     has_m32() {
322 agriffis 1.58 test_flag -m32
323     return $?
324 lv 1.56 }
325    
326 vapier 1.18 replace-sparc64-flags() {
327 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
328    
329 agriffis 1.58 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
330     for x in ${SPARC64_CPUS}; do
331 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
332     done
333     else
334 agriffis 1.58 for x in ${SPARC64_CPUS}; do
335 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
336     done
337     fi
338    
339 agriffis 1.58 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
340     for x in ${SPARC64_CPUS}; do
341 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
342     done
343     else
344 agriffis 1.58 for x in ${SPARC64_CPUS}; do
345 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
346     done
347     fi
348 vapier 1.59
349     export CFLAGS CXXFLAGS
350 solar 1.27 }
351    
352     append-ldflags() {
353 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
354 vapier 1.28 return 0
355 solar 1.27 }
356    
357 solar 1.41 filter-ldflags() {
358 agriffis 1.58 local x
359    
360 solar 1.41 # we do this fancy spacing stuff so as to not filter
361     # out part of a flag ... we want flag atoms ! :D
362     LDFLAGS=" ${LDFLAGS} "
363     for x in "$@" ; do
364     LDFLAGS="${LDFLAGS// ${x} / }"
365     done
366     LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
367 vapier 1.59 export LDFLAGS
368 solar 1.41 return 0
369     }
370    
371 vapier 1.36 etexec-flags() {
372 agriffis 1.58 # if you're not using a hardened compiler you wont need this
373 solar 1.53 # PIC/no-pic kludge in the first place.
374 agriffis 1.58 has_hardened || return 0
375 pappy 1.50
376 agriffis 1.58 if has_pie || has_pic; then
377     [ -z "`is-flag -fno-pic`" ] &&
378     export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
379     [ -z "`is-flag -nopie`" ] &&
380     export CFLAGS="${CFLAGS} `test_flag -nopie`"
381 solar 1.35 fi
382 agriffis 1.58 return 0
383 solar 1.27 }
384    
385     fstack-flags() {
386 agriffis 1.58 if has_ssp; then
387     [ -z "`is-flag -fno-stack-protector`" ] &&
388     export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
389 solar 1.35 fi
390 agriffis 1.58 return 0
391 vapier 1.10 }

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