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Revision 1.11 Revision 1.76
1# Copyright 1999-2002 Gentoo Technologies, Inc. 1# Copyright 1999-2004 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.76 2004/10/30 00:00:14 vapier Exp $
4#
3# Author Bart Verwilst <verwilst@gentoo.org> 5# Author Bart Verwilst <verwilst@gentoo.org>
4# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.11 2002/12/22 12:11:56 cretin Exp $
5 6
6ECLASS=flag-o-matic 7ECLASS=flag-o-matic
7INHERITED="$INHERITED $ECLASS" 8INHERITED="$INHERITED $ECLASS"
8 9
10IUSE="debug"
11
12# need access to emktemp()
13inherit eutils toolchain-funcs
14
9# 15#
10#### filter-flags <flag> #### 16#### filter-flags <flags> ####
11# Remove particular flags from C[XX]FLAGS 17# Remove particular flags from C[XX]FLAGS
18# Matches only complete flags
12# 19#
13#### append-flags <flag> #### 20#### append-flags <flags> ####
14# Add extra flags to your current C[XX]FLAGS 21# Add extra flags to your current C[XX]FLAGS
15# 22#
16#### replace-flags <orig.flag> <new.flag> ### 23#### replace-flags <orig.flag> <new.flag> ###
17# Replace a flag by another one 24# Replace a flag by another one
18# 25#
26#### replace-cpu-flags <old.cpus> <new.cpu> ###
27# Replace march/mcpu flags that specify <old.cpus>
28# with flags that specify <new.cpu>
29#
19#### is-flag <flag> #### 30#### is-flag <flag> ####
20# Returns "true" if flag is set in C[XX]FLAGS 31# Returns "true" if flag is set in C[XX]FLAGS
21# Matches only complete flag 32# Matches only complete a flag
22# 33#
23#### strip-flags #### 34#### strip-flags ####
24# Strip C[XX]FLAGS of everything except known 35# Strip C[XX]FLAGS of everything except known
25# good options. 36# good options.
26# 37#
38#### strip-unsupported-flags ####
39# Strip C[XX]FLAGS of any flags not supported by
40# installed version of gcc
41#
27#### get-flag <flag> #### 42#### get-flag <flag> ####
28# Find and echo the value for a particular flag 43# Find and echo the value for a particular flag
29# 44#
45#### replace-sparc64-flags ####
46# Sets mcpu to v8 and uses the original value
47# as mtune if none specified.
48#
49#### filter-mfpmath <math types> ####
50# Remove specified math types from the fpmath specification
51# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52# will leave the user with -mfpmath=386
53#
54#### append-ldflags ####
55# Add extra flags to your current LDFLAGS
56#
57#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS
59# Matches only complete flags
60#
61#### etexec-flags ####
62# hooked function for hardened gcc that appends
63# -fno-pic to {C,CXX,LD}FLAGS
64# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
65#
66#### fstack-flags ####
67# hooked function for hardened gcc that appends
68# -fno-stack-protector to {C,CXX,LD}FLAGS
69# when a package is filtering -fstack-protector, -fstack-protector-all
70# notice: modern automatic specs files will also suppress -fstack-protector-all
71# when only -fno-stack-protector is given
72#
30 73
74# C[XX]FLAGS that we allow in strip-flags
75setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then
77 export ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
82 case "${ARCH}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
88 esac
89 fi
90 # allow a bunch of flags that negate features / control ABI
91 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
92 case "${ARCH}" in
93 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
94 esac
95 ALLOWED_FLAGS="${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"
96
97 # C[XX]FLAGS that we are think is ok, but needs testing
98 # NOTE: currently -Os have issues with gcc3 and K6* arch's
99 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
100 return 0
101}
102
31filter-flags () { 103filter-flags() {
104 local x f fset
105 declare -a new_CFLAGS new_CXXFLAGS
32 106
33 for x in $1 107 for x in "$@" ; do
108 case "${x}" in
109 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
110 -fstack-protector|-fstack-protector-all) fstack-flags;;
111 esac
34 do 112 done
35 export CFLAGS="${CFLAGS/${x}}" 113
36 export CXXFLAGS="${CXXFLAGS/${x}}" 114 for fset in CFLAGS CXXFLAGS; do
115 # Looping over the flags instead of using a global
116 # substitution ensures that we're working with flag atoms.
117 # Otherwise globs like -O* have the potential to wipe out the
118 # list of flags.
119 for f in ${!fset}; do
120 for x in "$@"; do
121 # Note this should work with globs like -O*
122 [[ ${f} == ${x} ]] && continue 2
123 done
124 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
37 done 125 done
126 eval export ${fset}=\${new_${fset}\[*]}
127 done
38 128
129 return 0
39} 130}
40 131
132filter-lfs-flags() {
133 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
134}
135
136append-lfs-flags() {
137 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
138}
139
41append-flags () { 140append-flags() {
42
43 CFLAGS="${CFLAGS} $1" 141 export CFLAGS="${CFLAGS} $*"
44 CXXFLAGS="${CXXFLAGS} $1" 142 export CXXFLAGS="${CXXFLAGS} $*"
45 143 [ -n "`is-flag -fno-stack-protector`" -o \
144 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
145 return 0
46} 146}
47 147
48replace-flags () { 148replace-flags() {
149 local f fset
150 declare -a new_CFLAGS new_CXXFLAGS
49 151
50 CFLAGS="${CFLAGS/${1}/${2} }" 152 for fset in CFLAGS CXXFLAGS; do
51 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 153 # Looping over the flags instead of using a global
154 # substitution ensures that we're working with flag atoms.
155 # Otherwise globs like -O* have the potential to wipe out the
156 # list of flags.
157 for f in ${!fset}; do
158 # Note this should work with globs like -O*
159 [[ ${f} == ${1} ]] && f=${2}
160 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
161 done
162 eval export ${fset}=\${new_${fset}\[*]}
163 done
52 164
165 return 0
166}
167
168replace-cpu-flags() {
169 local newcpu="$#" ; newcpu="${!newcpu}"
170 while [ $# -gt 1 ] ; do
171 # quote to make sure that no globbing is done (particularly on
172 # ${oldcpu} prior to calling replace-flags
173 replace-flags "-march=${1}" "-march=${newcpu}"
174 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
175 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
176 shift
177 done
178 return 0
53} 179}
54 180
55is-flag() { 181is-flag() {
182 local x
56 183
57 for x in ${CFLAGS} ${CXXFLAGS} 184 for x in ${CFLAGS} ${CXXFLAGS} ; do
58 do 185 # Note this should work with globs like -mcpu=ultrasparc*
59 if [ "${x}" = "$1" ] 186 if [[ ${x} == ${1} ]]; then
60 then
61 echo true 187 echo true
62 break 188 return 0
63 fi 189 fi
64 done 190 done
191 return 1
192}
65 193
194filter-mfpmath() {
195 local orig_mfpmath new_math prune_math
196
197 # save the original -mfpmath flag
198 orig_mfpmath="`get-flag -mfpmath`"
199 # get the value of the current -mfpmath flag
200 new_math=" `get-flag mfpmath | tr , ' '` "
201 # figure out which math values are to be removed
202 prune_math=""
203 for prune_math in "$@" ; do
204 new_math="${new_math/ ${prune_math} / }"
205 done
206 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
207
208 if [ -z "${new_math}" ] ; then
209 # if we're removing all user specified math values are
210 # slated for removal, then we just filter the flag
211 filter-flags ${orig_mfpmath}
212 else
213 # if we only want to filter some of the user specified
214 # math values, then we replace the current flag
215 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
216 fi
217 return 0
66} 218}
67 219
68strip-flags() { 220strip-flags() {
221 local x y flag NEW_CFLAGS NEW_CXXFLAGS
222
223 setup-allowed-flags
69 224
70 local NEW_CFLAGS="" 225 local NEW_CFLAGS=""
71 local NEW_CXXFLAGS="" 226 local NEW_CXXFLAGS=""
72 227
73 local ALLOWED_FLAGS="-O -mcpu -march -pipe -g" 228 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
229 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
230 use debug && einfo "Enabling the use of some unstable flags"
231 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
232 fi
74 233
75 set -f 234 set -f # disable pathname expansion
76 235
77 for x in ${CFLAGS} 236 for x in ${CFLAGS}; do
78 do
79 for y in ${ALLOWED_FLAGS} 237 for y in ${ALLOWED_FLAGS}; do
80 do 238 flag=${x%%=*}
81 if [ "${x/${y}}" != "${x}" ] 239 if [ "${flag%%${y}}" = "" ] ; then
82 then
83 if [ -z "${NEW_CFLAGS}" ]
84 then
85 NEW_CFLAGS="${x}"
86 else
87 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 240 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
88 fi 241 break
89 fi 242 fi
90 done 243 done
91 done 244 done
92 245
93 for x in ${CXXFLAGS} 246 for x in ${CXXFLAGS}; do
94 do
95 for y in ${ALLOWED_FLAGS} 247 for y in ${ALLOWED_FLAGS}; do
96 do 248 flag=${x%%=*}
97 if [ "${x/${y}}" != "${x}" ] 249 if [ "${flag%%${y}}" = "" ] ; then
98 then
99 if [ -z "${NEW_CXXFLAGS}" ]
100 then
101 NEW_CXXFLAGS="${x}"
102 else
103 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 250 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
104 fi 251 break
105 fi 252 fi
106 done 253 done
107 done 254 done
108 255
109 set +f 256 # In case we filtered out all optimization flags fallback to -O2
257 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
258 NEW_CFLAGS="${NEW_CFLAGS} -O2"
259 fi
260 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
261 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
262 fi
263
264 set +f # re-enable pathname expansion
110 265
111 export CFLAGS="${NEW_CFLAGS}" 266 export CFLAGS="${NEW_CFLAGS}"
112 export CXXFLAGS="${NEW_CXXFLAGS}" 267 export CXXFLAGS="${NEW_CXXFLAGS}"
268 return 0
269}
270
271test_flag() {
272 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
273 printf "%s\n" "$*"
274 return 0
275 fi
276 return 1
277}
278
279test_version_info() {
280 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 return 0
282 else
283 return 1
284 fi
285}
286
287strip-unsupported-flags() {
288 local NEW_CFLAGS NEW_CXXFLAGS
289
290 for x in ${CFLAGS} ; do
291 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
292 done
293 for x in ${CXXFLAGS} ; do
294 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
295 done
296
297 export CFLAGS="${NEW_CFLAGS}"
298 export CXXFLAGS="${NEW_CXXFLAGS}"
113} 299}
114 300
115get-flag() { 301get-flag() {
116 local findflag="$1" 302 local f findflag="$1"
117 303
304 # this code looks a little flaky but seems to work for
305 # everything we want ...
306 # for example, if CFLAGS="-march=i686":
307 # `get-flag -march` == "-march=i686"
308 # `get-flag march` == "i686"
118 for f in ${CFLAGS} ${CXXFLAGS} ; do 309 for f in ${CFLAGS} ${CXXFLAGS} ; do
119 if [ "${f/${findflag}}" != "${f}" ] ; then 310 if [ "${f/${findflag}}" != "${f}" ] ; then
120 echo "${f/-${findflag}=}" 311 printf "%s\n" "${f/-${findflag}=}"
121 return 312 return 0
122 fi 313 fi
123 done 314 done
315 return 1
124} 316}
317
318has_hardened() {
319 test_version_info Hardened && return 0
320 # the specs file wont exist unless gcc has GCC_SPECS support
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
322 return 0
323 return 1
324}
325
326has_pic() {
327 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
328 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
329 test_version_info pie && return 0
330 return 1
331}
332
333has_pie() {
334 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
335 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
336 test_version_info pie && return 0
337 return 1
338}
339
340has_ssp() {
341 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
342 test_version_info ssp && return 0
343 return 1
344}
345
346has_m64() {
347 # 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 local temp="$(emktemp)"
352 echo "int main() { return(0); }" > ${temp}.c
353 MY_CC=$(tc-getCC)
354 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
355 local ret=$?
356 rm -f ${temp}.c
357 [ "$ret" != "1" ] && return 0
358 return 1
359}
360
361has_m32() {
362 # 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 local temp="$(emktemp)"
367 echo "int main() { return(0); }" > ${temp}.c
368 MY_CC=$(tc-getCC)
369 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
370 local ret=$?
371 rm -f ${temp}.c
372 [ "$ret" != "1" ] && return 0
373 return 1
374}
375
376replace-sparc64-flags() {
377 local SPARC64_CPUS="ultrasparc v9"
378
379 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
380 for x in ${SPARC64_CPUS}; do
381 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
382 done
383 else
384 for x in ${SPARC64_CPUS}; do
385 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
386 done
387 fi
388
389 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
390 for x in ${SPARC64_CPUS}; do
391 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
392 done
393 else
394 for x in ${SPARC64_CPUS}; do
395 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
396 done
397 fi
398
399 export CFLAGS CXXFLAGS
400}
401
402append-ldflags() {
403 export LDFLAGS="${LDFLAGS} $*"
404 return 0
405}
406
407filter-ldflags() {
408 local x
409
410 # we do this fancy spacing stuff so as to not filter
411 # out part of a flag ... we want flag atoms ! :D
412 LDFLAGS=" ${LDFLAGS} "
413 for x in "$@" ; do
414 LDFLAGS="${LDFLAGS// ${x} / }"
415 done
416 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
417 export LDFLAGS
418 return 0
419}
420
421etexec-flags() {
422 # if you're not using a hardened compiler you wont need this
423 # PIC/no-pic kludge in the first place.
424 has_hardened || return 0
425 # this kludge breaks on amd64, and probably other -fPIC dependant
426 # archs.
427 use amd64 && return 0
428
429 if has_pie || has_pic; then
430 [ -z "`is-flag -fno-pic`" ] &&
431 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
432 [ -z "`is-flag -nopie`" ] &&
433 export CFLAGS="${CFLAGS} `test_flag -nopie`"
434 fi
435 return 0
436}
437
438fstack-flags() {
439 if has_ssp; then
440 [ -z "`is-flag -fno-stack-protector`" ] &&
441 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
442 fi
443 return 0
444}
445
446# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
447# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
448# fixes.
449#
450# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
451gcc2-flags() {
452 CFLAGS=${CFLAGS//pentium-mmx/i586}
453 CFLAGS=${CFLAGS//pentium[234]/i686}
454 CFLAGS=${CFLAGS//k6-[23]/k6}
455 CFLAGS=${CFLAGS//athlon-tbird/i686}
456 CFLAGS=${CFLAGS//athlon-4/i686}
457 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
458 CFLAGS=${CFLAGS//athlon/i686}
459
460 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
461 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
462 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
463 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
464 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
465 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
466 CXXFLAGS=${CXXFLAGS//athlon/i686}
467
468 if [ "$ARCH" = alpha ]; then
469 CHOST=${CHOST/#alphaev6[78]/alphaev6}
470 CFLAGS=${CFLAGS//ev6[78]/ev6}
471 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
472 fi
473
474 export CFLAGS CXXFLAGS
475}

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