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Revision 1.49 Revision 1.62
1# Copyright 1999-2003 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 1.49 2004/05/11 13:02:05 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.62 2004/07/15 04:59:44 lv Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Author Bart Verwilst <verwilst@gentoo.org>
6 6
7ECLASS=flag-o-matic 7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS" 8INHERITED="$INHERITED $ECLASS"
9IUSE="$IUSE debug"
9 10
10# 11#
11#### filter-flags <flags> #### 12#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS 13# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags 14# Matches only complete flags
52#### filter-ldflags <flags> #### 53#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS 54# Remove particular flags from LDFLAGS
54# Matches only complete flags 55# Matches only complete flags
55# 56#
56#### etexec-flags #### 57#### etexec-flags ####
57# hooked function for hardened-gcc that appends 58# hooked function for hardened gcc that appends
58# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed 59# -fno-pic to {C,CXX,LD}FLAGS
59# and a package is filtering -fPIC,-fpic, -fPIE, -fpie 60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
60# 61#
61#### fstack-flags #### 62#### fstack-flags ####
62# hooked function for hardened-gcc that appends 63# hooked function for hardened gcc that appends
63# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed 64# -fno-stack-protector to {C,CXX,LD}FLAGS
64# and a package is filtering -fstack-protector, -fstack-protector-all 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
65# 68#
66 69
67# C[XX]FLAGS that we allow in strip-flags 70# C[XX]FLAGS that we allow in strip-flags
68setup-allowed-flags() { 71setup-allowed-flags() {
69 if [ -z "${ALLOWED_FLAGS}" ] ; then 72 if [ -z "${ALLOWED_FLAGS}" ] ; then
70 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
71 case "${ARCH}" in 74 case "${ARCH}" in
72 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
73 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
74 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
75 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
76 esac 80 esac
77 fi 81 fi
78 82
81 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
82 return 0 86 return 0
83} 87}
84 88
85filter-flags() { 89filter-flags() {
90 local x f fset
91 declare -a new_CFLAGS new_CXXFLAGS
92
86 for x in "$@" ; do 93 for x in "$@" ; do
87 case "${x}" in 94 case "${x}" in
88 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
89 -fstack-protector|-fstack-protector-all) fstack-flags;; 96 -fstack-protector|-fstack-protector-all) fstack-flags;;
90 *) ;;
91 esac 97 esac
92 done 98 done
93 99
94 # we do this fancy spacing stuff so as to not filter 100 for fset in CFLAGS CXXFLAGS; do
95 # out part of a flag ... we want flag atoms ! :D 101 for f in ${!fset}; do
96 CFLAGS=" ${CFLAGS} "
97 CXXFLAGS=" ${CXXFLAGS} "
98 for x in "$@" ; do 102 for x in "$@"; do
99 CFLAGS="${CFLAGS// ${x} / }" 103 # Note this should work with globs like -O*
100 CXXFLAGS="${CXXFLAGS// ${x} / }" 104 [[ ${f} == ${x} ]] && continue 2
105 done
106 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
101 done 107 done
102 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 108 eval export ${fset}=\${new_${fset}\[*]}
103 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 109 done
110
104 return 0 111 return 0
105} 112}
106 113
107filter-lfs-flags() { 114filter-lfs-flags() {
108 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 115 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
111append-lfs-flags() { 118append-lfs-flags() {
112 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 119 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
113} 120}
114 121
115append-flags() { 122append-flags() {
116 export CFLAGS="${CFLAGS} $@" 123 export CFLAGS="${CFLAGS} $*"
117 export CXXFLAGS="${CXXFLAGS} $@" 124 export CXXFLAGS="${CXXFLAGS} $*"
118 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 125 [ -n "`is-flag -fno-stack-protector`" -o \
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
119 return 0 127 return 0
120} 128}
121 129
122replace-flags() { 130replace-flags() {
123 # we do this fancy spacing stuff so as to not filter 131 # we do this fancy spacing stuff so as to not filter
126 CXXFLAGS=" ${CXXFLAGS} " 134 CXXFLAGS=" ${CXXFLAGS} "
127 CFLAGS="${CFLAGS// ${1} / ${2} }" 135 CFLAGS="${CFLAGS// ${1} / ${2} }"
128 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
129 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
130 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
139 export CFLAGS CXXFLAGS
131 return 0 140 return 0
132} 141}
133 142
134replace-cpu-flags() { 143replace-cpu-flags() {
135 local newcpu="$1" ; shift 144 local oldcpu newcpu="$1" ; shift
136 local oldcpu=""
137 for oldcpu in "$@" ; do 145 for oldcpu in "$@" ; do
138 replace-flags -march=${oldcpu} -march=${newcpu} 146 replace-flags -march=${oldcpu} -march=${newcpu}
139 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
140 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 148 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
141 done 149 done
142 return 0 150 return 0
143} 151}
144 152
145is-flag() { 153is-flag() {
154 local x
155
146 for x in ${CFLAGS} ${CXXFLAGS} ; do 156 for x in ${CFLAGS} ${CXXFLAGS} ; do
147 if [ "${x}" == "$1" ] ; then 157 if [ "${x}" == "$1" ] ; then
148 echo true 158 echo true
149 return 0 159 return 0
150 fi 160 fi
151 done 161 done
152 return 1 162 return 1
153} 163}
154 164
155filter-mfpmath() { 165filter-mfpmath() {
166 local orig_mfpmath new_math prune_math
167
156 # save the original -mfpmath flag 168 # save the original -mfpmath flag
157 local orig_mfpmath="`get-flag -mfpmath`" 169 orig_mfpmath="`get-flag -mfpmath`"
158 # get the value of the current -mfpmath flag 170 # get the value of the current -mfpmath flag
159 local new_math=" `get-flag mfpmath | tr , ' '` " 171 new_math=" `get-flag mfpmath | tr , ' '` "
160 # figure out which math values are to be removed 172 # figure out which math values are to be removed
161 local prune_math="" 173 prune_math=""
162 for prune_math in "$@" ; do 174 for prune_math in "$@" ; do
163 new_math="${new_math/ ${prune_math} / }" 175 new_math="${new_math/ ${prune_math} / }"
164 done 176 done
165 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 177 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
166 178
175 fi 187 fi
176 return 0 188 return 0
177} 189}
178 190
179strip-flags() { 191strip-flags() {
192 local x y flag NEW_CFLAGS NEW_CXXFLAGS
193
180 setup-allowed-flags 194 setup-allowed-flags
181 195
182 local NEW_CFLAGS="" 196 local NEW_CFLAGS=""
183 local NEW_CXXFLAGS="" 197 local NEW_CXXFLAGS=""
184 198
186 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
187 use debug && einfo "Enabling the use of some unstable flags" 201 use debug && einfo "Enabling the use of some unstable flags"
188 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
189 fi 203 fi
190 204
191 set -f 205 set -f # disable pathname expansion
192 206
193 for x in ${CFLAGS} 207 for x in ${CFLAGS}; do
194 do
195 for y in ${ALLOWED_FLAGS} 208 for y in ${ALLOWED_FLAGS}; do
196 do
197 flag=${x%%=*} 209 flag=${x%%=*}
198 if [ "${flag%%${y}}" = "" ] 210 if [ "${flag%%${y}}" = "" ]; then
199 then
200 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 211 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
201 break 212 break
202 fi 213 fi
203 done 214 done
204 done 215 done
205 216
206 for x in ${CXXFLAGS} 217 for x in ${CXXFLAGS}; do
207 do
208 for y in ${ALLOWED_FLAGS} 218 for y in ${ALLOWED_FLAGS}; do
209 do
210 flag=${x%%=*} 219 flag=${x%%=*}
211 if [ "${flag%%${y}}" = "" ] 220 if [ "${flag%%${y}}" = "" ]; then
212 then
213 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
214 break 222 break
215 fi 223 fi
216 done 224 done
217 done 225 done
222 fi 230 fi
223 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 231 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
224 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 232 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
225 fi 233 fi
226 234
227 set +f 235 set +f # re-enable pathname expansion
228
229 use debug \
230 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
231 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
232 236
233 export CFLAGS="${NEW_CFLAGS}" 237 export CFLAGS="${NEW_CFLAGS}"
234 export CXXFLAGS="${NEW_CXXFLAGS}" 238 export CXXFLAGS="${NEW_CXXFLAGS}"
235 return 0 239 return 0
236} 240}
237 241
238test_flag() { 242test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *}
239 if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then 244 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
240 echo "$@" 245 printf "%s\n" "$*"
241 return 0 246 return 0
242 fi 247 fi
243 return 1 248 return 1
244} 249}
245 250
251test_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
246strip-unsupported-flags() { 260strip-unsupported-flags() {
261 local NEW_CFLAGS NEW_CXXFLAGS
262
247 for x in ${CFLAGS} ; do 263 for x in ${CFLAGS} ; do
248 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 264 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
249 done 265 done
250 for x in ${CXXFLAGS} ; do 266 for x in ${CXXFLAGS} ; do
251 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 267 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
252 done 268 done
253 269
254 export CFLAGS="${NEW_CFLAGS}" 270 export CFLAGS="${NEW_CFLAGS}"
255 export CXXFLAGS="${NEW_CXXFLAGS}" 271 export CXXFLAGS="${NEW_CXXFLAGS}"
256} 272}
257 273
258get-flag() { 274get-flag() {
275 local f findflag="$1"
276
259 # this code looks a little flaky but seems to work for 277 # this code looks a little flaky but seems to work for
260 # everything we want ... 278 # everything we want ...
261 # for example, if CFLAGS="-march=i686": 279 # for example, if CFLAGS="-march=i686":
262 # `get-flags -march` == "-march=i686" 280 # `get-flag -march` == "-march=i686"
263 # `get-flags march` == "i686" 281 # `get-flag march` == "i686"
264 local findflag="$1"
265 for f in ${CFLAGS} ${CXXFLAGS} ; do 282 for f in ${CFLAGS} ${CXXFLAGS} ; do
266 if [ "${f/${findflag}}" != "${f}" ] ; then 283 if [ "${f/${findflag}}" != "${f}" ] ; then
267 echo "${f/-${findflag}=}" 284 printf "%s\n" "${f/-${findflag}=}"
268 return 0 285 return 0
269 fi 286 fi
270 done 287 done
271 return 1 288 return 1
289}
290
291has_hardened() {
292 test_version_info Hardened
293 return $?
272} 294}
273 295
274has_pic() { 296has_pic() {
275 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
276 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
277 has_version sys-devel/hardened-gcc && return 0 299 test_version_info pie && return 0
278 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
279 return 1 300 return 1
280} 301}
281 302
282has_pie() { 303has_pie() {
283 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 304 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
284 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 305 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
285 has_version sys-devel/hardened-gcc && return 0 306 test_version_info pie && return 0
286 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
287 return 1 307 return 1
288} 308}
289 309
290has_ssp() { 310has_ssp() {
291 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
292 has_version sys-devel/hardened-gcc && return 0 312 test_version_info ssp && return 0
293 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0 313 return 1
314}
315
316has_m64() {
317 # this doesnt test if the flag is accepted, it tests if the flag
318 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
319 # please dont replace this function with test_flag in some future
320 # clean-up!
321 temp=`mktemp`
322 echo "int main() { return(0); }" > ${temp}.c
323 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
324 ret=$?
325 rm -f ${temp}.c
326 [ "$ret" != "1" ] && return 0
327 return 1
328}
329
330has_m32() {
331 # this doesnt test if the flag is accepted, it tests if the flag
332 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
333 # please dont replace this function with test_flag in some future
334 # clean-up!
335 temp=`mktemp`
336 echo "int main() { return(0); }" > ${temp}.c
337 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
338 ret=$?
339 rm -f ${temp}.c
340 [ "$ret" != "1" ] && return 0
294 return 1 341 return 1
295} 342}
296 343
297replace-sparc64-flags() { 344replace-sparc64-flags() {
298 local SPARC64_CPUS="ultrasparc v9" 345 local SPARC64_CPUS="ultrasparc v9"
299 346
300 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
301 then
302 for x in ${SPARC64_CPUS} 348 for x in ${SPARC64_CPUS}; do
303 do
304 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
305 done 350 done
306 else 351 else
307 for x in ${SPARC64_CPUS} 352 for x in ${SPARC64_CPUS}; do
308 do
309 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
310 done 354 done
311 fi 355 fi
312 356
313 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
314 then
315 for x in ${SPARC64_CPUS} 358 for x in ${SPARC64_CPUS}; do
316 do
317 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
318 done 360 done
319 else 361 else
320 for x in ${SPARC64_CPUS} 362 for x in ${SPARC64_CPUS}; do
321 do
322 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 363 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
323 done 364 done
324 fi 365 fi
366
367 export CFLAGS CXXFLAGS
325} 368}
326 369
327append-ldflags() { 370append-ldflags() {
328 LDFLAGS="${LDFLAGS} $@" 371 export LDFLAGS="${LDFLAGS} $*"
329 return 0 372 return 0
330} 373}
331 374
332filter-ldflags() { 375filter-ldflags() {
376 local x
377
333 # we do this fancy spacing stuff so as to not filter 378 # we do this fancy spacing stuff so as to not filter
334 # out part of a flag ... we want flag atoms ! :D 379 # out part of a flag ... we want flag atoms ! :D
335 LDFLAGS=" ${LDFLAGS} " 380 LDFLAGS=" ${LDFLAGS} "
336 for x in "$@" ; do 381 for x in "$@" ; do
337 LDFLAGS="${LDFLAGS// ${x} / }" 382 LDFLAGS="${LDFLAGS// ${x} / }"
338 done 383 done
339 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
385 export LDFLAGS
340 return 0 386 return 0
341} 387}
342 388
343etexec-flags() { 389etexec-flags() {
390 # if you're not using a hardened compiler you wont need this
391 # PIC/no-pic kludge in the first place.
392 has_hardened || return 0
393
344 has_pie || has_pic 394 if has_pie || has_pic; then
345 if [ $? == 0 ] ; then
346 [ -z "`is-flag -yet_exec`" ] && 395 [ -z "`is-flag -fno-pic`" ] &&
347 export CFLAGS="${CFLAGS} `test_flag -yet_exec`" 396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
348 [ -z "`is-flag -nopie`" ] && 397 [ -z "`is-flag -nopie`" ] &&
349 export CFLAGS="${CFLAGS} `test_flag -nopie`" 398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
350 fi 399 fi
400 return 0
351} 401}
352 402
353fstack-flags() { 403fstack-flags() {
354 has_ssp 404 if has_ssp; then
355 if [ $? == 0 ] ; then
356 [ -z "`is-flag -yno_propolice`" ] && 405 [ -z "`is-flag -fno-stack-protector`" ] &&
357 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
358 fi 407 fi
408 return 0
359} 409}

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