/[gentoo-x86]/eclass/flag-o-matic.eclass
Gentoo

Diff of /eclass/flag-o-matic.eclass

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.37 Revision 1.64
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 1.37 2004/02/21 07:19:29 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.64 2004/07/22 15:29:10 agriffis 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"
9
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
12IUSE="${IUSE} debug"
9 13
10# 14#
11#### filter-flags <flags> #### 15#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS 16# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags 17# Matches only complete flags
47# will leave the user with -mfpmath=386 51# will leave the user with -mfpmath=386
48# 52#
49#### append-ldflags #### 53#### append-ldflags ####
50# Add extra flags to your current LDFLAGS 54# Add extra flags to your current LDFLAGS
51# 55#
56#### filter-ldflags <flags> ####
57# Remove particular flags from LDFLAGS
58# Matches only complete flags
59#
52#### etexec-flags #### 60#### etexec-flags ####
53# hooked function for hardened-gcc that appends 61# hooked function for hardened gcc that appends
54# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed 62# -fno-pic to {C,CXX,LD}FLAGS
55# and a package is filtering -fPIC,-fpic, -fPIE, -fpie 63# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
56# 64#
57#### fstack-flags #### 65#### fstack-flags ####
58# hooked function for hardened-gcc that appends 66# hooked function for hardened gcc that appends
59# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed 67# -fno-stack-protector to {C,CXX,LD}FLAGS
60# and a package is filtering -fstack-protector, -fstack-protector-all 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
61# 71#
62 72
63# C[XX]FLAGS that we allow in strip-flags 73# C[XX]FLAGS that we allow in strip-flags
64setup-allowed-flags() { 74setup-allowed-flags() {
75 if [ -z "${ALLOWED_FLAGS}" ] ; then
65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
66 case "${ARCH}" in 77 case "${ARCH}" in
67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
71 esac 83 esac
84 fi
72 85
73 # C[XX]FLAGS that we are think is ok, but needs testing 86 # C[XX]FLAGS that we are think is ok, but needs testing
74 # NOTE: currently -Os have issues with gcc3 and K6* arch's 87 # NOTE: currently -Os have issues with gcc3 and K6* arch's
75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 88 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
76 return 0 89 return 0
77} 90}
78 91
79filter-flags() { 92filter-flags() {
93 local x f fset
94 declare -a new_CFLAGS new_CXXFLAGS
95
80 for x in "$@" ; do 96 for x in "$@" ; do
81 case "${x}" in 97 case "${x}" in
82 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;; 98 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
83 -fstack-protector|-fstack-protector-all) fstack-flags;; 99 -fstack-protector|-fstack-protector-all) fstack-flags;;
84 *) ;;
85 esac 100 esac
86 done 101 done
87 102
88 # we do this fancy spacing stuff so as to not filter 103 for fset in CFLAGS CXXFLAGS; do
89 # out part of a flag ... we want flag atoms ! :D 104 # Looping over the flags instead of using a global
90 CFLAGS=" ${CFLAGS} " 105 # substitution ensures that we're working with flag atoms.
91 CXXFLAGS=" ${CXXFLAGS} " 106 # Otherwise globs like -O* have the potential to wipe out the
107 # list of flags.
108 for f in ${!fset}; do
92 for x in "$@" ; do 109 for x in "$@"; do
93 CFLAGS="${CFLAGS// ${x} / }" 110 # Note this should work with globs like -O*
94 CXXFLAGS="${CXXFLAGS// ${x} / }" 111 [[ ${f} == ${x} ]] && continue 2
112 done
113 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
95 done 114 done
96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 115 eval export ${fset}=\${new_${fset}\[*]}
97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 116 done
117
98 return 0 118 return 0
119}
120
121filter-lfs-flags() {
122 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
123}
124
125append-lfs-flags() {
126 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
99} 127}
100 128
101append-flags() { 129append-flags() {
102 export CFLAGS="${CFLAGS} $@" 130 export CFLAGS="${CFLAGS} $*"
103 export CXXFLAGS="${CXXFLAGS} $@" 131 export CXXFLAGS="${CXXFLAGS} $*"
104 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 132 [ -n "`is-flag -fno-stack-protector`" -o \
133 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
105 return 0 134 return 0
106} 135}
107 136
108replace-flags() { 137replace-flags() {
109 # we do this fancy spacing stuff so as to not filter 138 local f fset
110 # out part of a flag ... we want flag atoms ! :D 139 declare -a new_CFLAGS new_CXXFLAGS
111 CFLAGS=" ${CFLAGS} " 140
112 CXXFLAGS=" ${CXXFLAGS} " 141 for fset in CFLAGS CXXFLAGS; do
113 CFLAGS="${CFLAGS// ${1} / ${2} }" 142 # Looping over the flags instead of using a global
114 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 143 # substitution ensures that we're working with flag atoms.
115 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 144 # Otherwise globs like -O* have the potential to wipe out the
116 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 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
117 return 0 154 return 0
118} 155}
119 156
120replace-cpu-flags() { 157replace-cpu-flags() {
121 local newcpu="$1" ; shift 158 local oldcpu newcpu="$1" ; shift
122 local oldcpu=""
123 for oldcpu in "$@" ; do 159 for oldcpu in "$@" ; do
160 # quote to make sure that no globbing is done (particularly on
161 # ${oldcpu} prior to calling replace-flags
124 replace-flags -march=${oldcpu} -march=${newcpu} 162 replace-flags "-march=${oldcpu}" "-march=${newcpu}"
125 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 163 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}"
164 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}"
126 done 165 done
127 return 0 166 return 0
128} 167}
129 168
130is-flag() { 169is-flag() {
170 local x
171
131 for x in ${CFLAGS} ${CXXFLAGS} ; do 172 for x in ${CFLAGS} ${CXXFLAGS} ; do
132 if [ "${x}" == "$1" ] ; then 173 if [ "${x}" == "$1" ] ; then
133 echo true 174 echo true
134 return 0 175 return 0
135 fi 176 fi
136 done 177 done
137 return 1 178 return 1
138} 179}
139 180
140filter-mfpmath() { 181filter-mfpmath() {
182 local orig_mfpmath new_math prune_math
183
141 # save the original -mfpmath flag 184 # save the original -mfpmath flag
142 local orig_mfpmath="`get-flag -mfpmath`" 185 orig_mfpmath="`get-flag -mfpmath`"
143 # get the value of the current -mfpmath flag 186 # get the value of the current -mfpmath flag
144 local new_math=" `get-flag mfpmath | tr , ' '` " 187 new_math=" `get-flag mfpmath | tr , ' '` "
145 # figure out which math values are to be removed 188 # figure out which math values are to be removed
146 local prune_math="" 189 prune_math=""
147 for prune_math in "$@" ; do 190 for prune_math in "$@" ; do
148 new_math="${new_math/ ${prune_math} / }" 191 new_math="${new_math/ ${prune_math} / }"
149 done 192 done
150 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 193 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
151 194
160 fi 203 fi
161 return 0 204 return 0
162} 205}
163 206
164strip-flags() { 207strip-flags() {
208 local x y flag NEW_CFLAGS NEW_CXXFLAGS
209
165 setup-allowed-flags 210 setup-allowed-flags
166 211
167 local NEW_CFLAGS="" 212 local NEW_CFLAGS=""
168 local NEW_CXXFLAGS="" 213 local NEW_CXXFLAGS=""
169 214
170 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 215 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
171 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 216 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
172 [ `use debug` ] && einfo "Enabling the use of some unstable flags" 217 use debug && einfo "Enabling the use of some unstable flags"
173 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 218 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
174 fi 219 fi
175 220
176 set -f 221 set -f # disable pathname expansion
177 222
178 for x in ${CFLAGS} 223 for x in ${CFLAGS}; do
179 do
180 for y in ${ALLOWED_FLAGS} 224 for y in ${ALLOWED_FLAGS}; do
181 do
182 flag=${x%%=*} 225 flag=${x%%=*}
183 if [ "${flag%%${y}}" = "" ] 226 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then
184 then
185 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 227 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
186 break 228 break
187 fi 229 fi
188 done 230 done
189 done 231 done
190 232
191 for x in ${CXXFLAGS} 233 for x in ${CXXFLAGS}; do
192 do
193 for y in ${ALLOWED_FLAGS} 234 for y in ${ALLOWED_FLAGS}; do
194 do
195 flag=${x%%=*} 235 flag=${x%%=*}
196 if [ "${flag%%${y}}" = "" ] 236 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then
197 then
198 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 237 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
199 break 238 break
200 fi 239 fi
201 done 240 done
202 done 241 done
207 fi 246 fi
208 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 247 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
209 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 248 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
210 fi 249 fi
211 250
212 set +f 251 set +f # re-enable pathname expansion
213
214 [ `use debug` ] \
215 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
216 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
217 252
218 export CFLAGS="${NEW_CFLAGS}" 253 export CFLAGS="${NEW_CFLAGS}"
219 export CXXFLAGS="${NEW_CXXFLAGS}" 254 export CXXFLAGS="${NEW_CXXFLAGS}"
220 return 0 255 return 0
221} 256}
222 257
223test_flag() { 258test_flag() {
259 local cc=${CC:-gcc} ; cc=${cc%% *}
224 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 260 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
225 echo "$@" 261 printf "%s\n" "$*"
226 return 0 262 return 0
227 fi 263 fi
228 return 1 264 return 1
229} 265}
230 266
267test_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
231strip-unsupported-flags() { 276strip-unsupported-flags() {
277 local NEW_CFLAGS NEW_CXXFLAGS
278
232 for x in ${CFLAGS} ; do 279 for x in ${CFLAGS} ; do
233 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 280 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
234 done 281 done
235 for x in ${CXXFLAGS} ; do 282 for x in ${CXXFLAGS} ; do
236 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 283 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
237 done 284 done
238 285
239 export CFLAGS="${NEW_CFLAGS}" 286 export CFLAGS="${NEW_CFLAGS}"
240 export CXXFLAGS="${NEW_CXXFLAGS}" 287 export CXXFLAGS="${NEW_CXXFLAGS}"
241} 288}
242 289
243get-flag() { 290get-flag() {
291 local f findflag="$1"
292
244 # this code looks a little flaky but seems to work for 293 # this code looks a little flaky but seems to work for
245 # everything we want ... 294 # everything we want ...
246 # for example, if CFLAGS="-march=i686": 295 # for example, if CFLAGS="-march=i686":
247 # `get-flags -march` == "-march=i686" 296 # `get-flag -march` == "-march=i686"
248 # `get-flags march` == "i686" 297 # `get-flag march` == "i686"
249 local findflag="$1"
250 for f in ${CFLAGS} ${CXXFLAGS} ; do 298 for f in ${CFLAGS} ${CXXFLAGS} ; do
251 if [ "${f/${findflag}}" != "${f}" ] ; then 299 if [ "${f/${findflag}}" != "${f}" ] ; then
252 echo "${f/-${findflag}=}" 300 printf "%s\n" "${f/-${findflag}=}"
253 return 0 301 return 0
254 fi 302 fi
255 done 303 done
256 return 1 304 return 1
257} 305}
258 306
307has_hardened() {
308 test_version_info Hardened
309 return $?
310}
311
312has_pic() {
313 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
314 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
315 test_version_info pie && return 0
316 return 1
317}
318
319has_pie() {
320 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
321 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
322 test_version_info pie && return 0
323 return 1
324}
325
326has_ssp() {
327 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
328 test_version_info ssp && return 0
329 return 1
330}
331
332has_m64() {
333 # 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}
345
346has_m32() {
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 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}
359
259replace-sparc64-flags() { 360replace-sparc64-flags() {
260 local SPARC64_CPUS="ultrasparc v9" 361 local SPARC64_CPUS="ultrasparc v9"
261 362
262 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 363 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
263 then
264 for x in ${SPARC64_CPUS} 364 for x in ${SPARC64_CPUS}; do
265 do
266 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 365 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
267 done 366 done
268 else 367 else
269 for x in ${SPARC64_CPUS} 368 for x in ${SPARC64_CPUS}; do
270 do
271 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 369 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
272 done 370 done
273 fi 371 fi
274 372
275 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 373 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
276 then
277 for x in ${SPARC64_CPUS} 374 for x in ${SPARC64_CPUS}; do
278 do
279 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 375 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
280 done 376 done
281 else 377 else
282 for x in ${SPARC64_CPUS} 378 for x in ${SPARC64_CPUS}; do
283 do
284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 379 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
285 done 380 done
286 fi 381 fi
382
383 export CFLAGS CXXFLAGS
287} 384}
288 385
289append-ldflags() { 386append-ldflags() {
387 export LDFLAGS="${LDFLAGS} $*"
388 return 0
389}
390
391filter-ldflags() {
392 local x
393
394 # we do this fancy spacing stuff so as to not filter
395 # out part of a flag ... we want flag atoms ! :D
290 LDFLAGS="${LDFLAGS} $@" 396 LDFLAGS=" ${LDFLAGS} "
397 for x in "$@" ; do
398 LDFLAGS="${LDFLAGS// ${x} / }"
399 done
400 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
401 export LDFLAGS
291 return 0 402 return 0
292} 403}
293 404
294etexec-flags() { 405etexec-flags() {
295 has_version sys-devel/hardened-gcc 406 # if you're not using a hardened compiler you wont need this
296 if [ $? == 0 ] ; then 407 # PIC/no-pic kludge in the first place.
297 if [ "`is-flag -yet_exec`" != "true" ]; then 408 has_hardened || return 0
298 debug-print ">>> appending flags -yet_exec" 409
299 append-flags -yet_exec 410 if has_pie || has_pic; then
300 append-ldflags -yet_exec 411 [ -z "`is-flag -fno-pic`" ] &&
412 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
413 [ -z "`is-flag -nopie`" ] &&
414 export CFLAGS="${CFLAGS} `test_flag -nopie`"
301 fi 415 fi
302 fi 416 return 0
303} 417}
304 418
305fstack-flags() { 419fstack-flags() {
306 has_version sys-devel/hardened-gcc 420 if has_ssp; then
307 if [ $? == 0 ] ; then 421 [ -z "`is-flag -fno-stack-protector`" ] &&
308 if [ "`is-flag -yno_propolice`" != "true" ]; then 422 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
309 debug-print ">>> appending flags -yno_propolice"
310 append-flags -yno_propolice
311 append-ldflags -yno_propolice
312 fi 423 fi
313 fi 424 return 0
314} 425}

Legend:
Removed from v.1.37  
changed lines
  Added in v.1.64

  ViewVC Help
Powered by ViewVC 1.1.20