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Revision 1.71 - (hide annotations) (download)
Fri Oct 1 10:00:36 2004 UTC (10 years, 2 months ago) by robbat2
Branch: MAIN
Changes since 1.70: +2 -2 lines
Add support for other classes of MIPS cpus.

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 robbat2 1.71 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.70 2004/09/25 07:37:19 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 1.70 #### replace-cpu-flags <old.cpus> <new.cpu> ###
26 vapier 1.37 # 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 "${ALLOWED_FLAGS}" ] ; then
76 lv 1.68 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g"
77 vapier 1.44 case "${ARCH}" in
78 robbat2 1.71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
79 lv 1.51 amd64) ALLOWED_FLAGS="${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 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
165     while [ $# -gt 1 ] ; do
166 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
167     # ${oldcpu} prior to calling replace-flags
168 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
169     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
170     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
171     shift
172 vapier 1.37 done
173     return 0
174     }
175    
176 danarmak 1.7 is-flag() {
177 agriffis 1.58 local x
178    
179 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
180 agriffis 1.67 # Note this should work with globs like -mcpu=ultrasparc*
181     if [[ ${x} == ${1} ]]; then
182 azarah 1.8 echo true
183 vapier 1.18 return 0
184     fi
185 danarmak 1.7 done
186 vapier 1.18 return 1
187 verwilst 1.1 }
188 azarah 1.8
189 vapier 1.36 filter-mfpmath() {
190 agriffis 1.58 local orig_mfpmath new_math prune_math
191    
192 vapier 1.36 # save the original -mfpmath flag
193 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
194 vapier 1.36 # get the value of the current -mfpmath flag
195 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
196 vapier 1.36 # figure out which math values are to be removed
197 agriffis 1.58 prune_math=""
198 vapier 1.36 for prune_math in "$@" ; do
199     new_math="${new_math/ ${prune_math} / }"
200     done
201     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
202    
203     if [ -z "${new_math}" ] ; then
204     # if we're removing all user specified math values are
205     # slated for removal, then we just filter the flag
206     filter-flags ${orig_mfpmath}
207     else
208     # if we only want to filter some of the user specified
209     # math values, then we replace the current flag
210     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
211     fi
212     return 0
213     }
214    
215 azarah 1.8 strip-flags() {
216 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
217    
218 vapier 1.36 setup-allowed-flags
219    
220 azarah 1.8 local NEW_CFLAGS=""
221     local NEW_CXXFLAGS=""
222    
223 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
224 vapier 1.49 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
225     use debug && einfo "Enabling the use of some unstable flags"
226 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
227     fi
228    
229 agriffis 1.58 set -f # disable pathname expansion
230 azarah 1.8
231 agriffis 1.58 for x in ${CFLAGS}; do
232     for y in ${ALLOWED_FLAGS}; do
233 lostlogic 1.14 flag=${x%%=*}
234 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
235 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
236     break
237 azarah 1.8 fi
238     done
239     done
240    
241 agriffis 1.58 for x in ${CXXFLAGS}; do
242     for y in ${ALLOWED_FLAGS}; do
243 lostlogic 1.14 flag=${x%%=*}
244 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
245 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
246     break
247 azarah 1.8 fi
248     done
249     done
250 azarah 1.30
251     # In case we filtered out all optimization flags fallback to -O2
252     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
253     NEW_CFLAGS="${NEW_CFLAGS} -O2"
254     fi
255     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
256     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
257     fi
258 azarah 1.8
259 agriffis 1.58 set +f # re-enable pathname expansion
260 azarah 1.8
261     export CFLAGS="${NEW_CFLAGS}"
262     export CXXFLAGS="${NEW_CXXFLAGS}"
263 vapier 1.36 return 0
264 puggy 1.29 }
265    
266 vapier 1.36 test_flag() {
267 agriffis 1.58 local cc=${CC:-gcc} ; cc=${cc%% *}
268     if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
269     printf "%s\n" "$*"
270 vapier 1.36 return 0
271 puggy 1.29 fi
272 vapier 1.36 return 1
273 puggy 1.29 }
274    
275 agriffis 1.58 test_version_info() {
276     local cc=${CC:-gcc} ; cc=${cc%% *}
277     if [[ $(${cc} --version 2>&1) == *$1* ]]; then
278     return 0
279     else
280     return 1
281     fi
282     }
283    
284 puggy 1.29 strip-unsupported-flags() {
285 agriffis 1.58 local NEW_CFLAGS NEW_CXXFLAGS
286    
287 vapier 1.36 for x in ${CFLAGS} ; do
288 agriffis 1.58 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
289 puggy 1.29 done
290 vapier 1.36 for x in ${CXXFLAGS} ; do
291 agriffis 1.58 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
292 puggy 1.29 done
293    
294 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
295     export CXXFLAGS="${NEW_CXXFLAGS}"
296 azarah 1.8 }
297    
298 vapier 1.10 get-flag() {
299 agriffis 1.58 local f findflag="$1"
300    
301 vapier 1.36 # this code looks a little flaky but seems to work for
302     # everything we want ...
303     # for example, if CFLAGS="-march=i686":
304 agriffis 1.58 # `get-flag -march` == "-march=i686"
305     # `get-flag march` == "i686"
306 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
307     if [ "${f/${findflag}}" != "${f}" ] ; then
308 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
309 vapier 1.28 return 0
310 vapier 1.10 fi
311     done
312 vapier 1.28 return 1
313 joker 1.16 }
314    
315 solar 1.53 has_hardened() {
316 lv 1.69 test_version_info Hardened && return 0
317     # the specs file wont exist unless gcc has GCC_SPECS support
318     [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
319     return 0
320     return 1
321 solar 1.53 }
322    
323 tseng 1.42 has_pic() {
324     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
325     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
326 agriffis 1.58 test_version_info pie && return 0
327 tseng 1.42 return 1
328     }
329    
330     has_pie() {
331 tseng 1.43 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
332     [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
333 agriffis 1.58 test_version_info pie && return 0
334 tseng 1.42 return 1
335     }
336    
337     has_ssp() {
338     [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
339 agriffis 1.58 test_version_info ssp && return 0
340 tseng 1.42 return 1
341     }
342    
343 lv 1.56 has_m64() {
344 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
345     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
346     # please dont replace this function with test_flag in some future
347     # clean-up!
348     temp=`mktemp`
349     echo "int main() { return(0); }" > ${temp}.c
350     ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
351     ret=$?
352     rm -f ${temp}.c
353     [ "$ret" != "1" ] && return 0
354     return 1
355 lv 1.56 }
356    
357     has_m32() {
358 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
359     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
360     # please dont replace this function with test_flag in some future
361     # clean-up!
362     temp=`mktemp`
363     echo "int main() { return(0); }" > ${temp}.c
364     ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
365     ret=$?
366     rm -f ${temp}.c
367     [ "$ret" != "1" ] && return 0
368     return 1
369 lv 1.56 }
370    
371 vapier 1.18 replace-sparc64-flags() {
372 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
373    
374 agriffis 1.58 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
375     for x in ${SPARC64_CPUS}; do
376 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
377     done
378     else
379 agriffis 1.58 for x in ${SPARC64_CPUS}; do
380 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
381     done
382     fi
383    
384 agriffis 1.58 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
385     for x in ${SPARC64_CPUS}; do
386 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
387     done
388     else
389 agriffis 1.58 for x in ${SPARC64_CPUS}; do
390 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
391     done
392     fi
393 vapier 1.59
394     export CFLAGS CXXFLAGS
395 solar 1.27 }
396    
397     append-ldflags() {
398 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
399 vapier 1.28 return 0
400 solar 1.27 }
401    
402 solar 1.41 filter-ldflags() {
403 agriffis 1.58 local x
404    
405 solar 1.41 # we do this fancy spacing stuff so as to not filter
406     # out part of a flag ... we want flag atoms ! :D
407     LDFLAGS=" ${LDFLAGS} "
408     for x in "$@" ; do
409     LDFLAGS="${LDFLAGS// ${x} / }"
410     done
411     LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
412 vapier 1.59 export LDFLAGS
413 solar 1.41 return 0
414     }
415    
416 vapier 1.36 etexec-flags() {
417 agriffis 1.58 # if you're not using a hardened compiler you wont need this
418 solar 1.53 # PIC/no-pic kludge in the first place.
419 agriffis 1.58 has_hardened || return 0
420 lv 1.66 # this kludge breaks on amd64, and probably other -fPIC dependant
421     # archs.
422     use amd64 && return 0
423 pappy 1.50
424 agriffis 1.58 if has_pie || has_pic; then
425     [ -z "`is-flag -fno-pic`" ] &&
426     export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
427     [ -z "`is-flag -nopie`" ] &&
428     export CFLAGS="${CFLAGS} `test_flag -nopie`"
429 solar 1.35 fi
430 agriffis 1.58 return 0
431 solar 1.27 }
432    
433     fstack-flags() {
434 agriffis 1.58 if has_ssp; then
435     [ -z "`is-flag -fno-stack-protector`" ] &&
436     export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
437 solar 1.35 fi
438 agriffis 1.58 return 0
439 vapier 1.10 }

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