/[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 1.30 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 1.30 2003/11/07 18:42:45 azarah 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
15#### append-flags <flags> #### 16#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS 17# Add extra flags to your current C[XX]FLAGS
17# 18#
18#### replace-flags <orig.flag> <new.flag> ### 19#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one 20# Replace a flag by another one
21#
22#### replace-cpu-flags <new.cpu> <old.cpus> ###
23# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu>
20# 25#
21#### is-flag <flag> #### 26#### is-flag <flag> ####
22# Returns "true" if flag is set in C[XX]FLAGS 27# Returns "true" if flag is set in C[XX]FLAGS
23# Matches only complete a flag 28# Matches only complete a flag
24# 29#
43# will leave the user with -mfpmath=386 48# will leave the user with -mfpmath=386
44# 49#
45#### append-ldflags #### 50#### append-ldflags ####
46# Add extra flags to your current LDFLAGS 51# Add extra flags to your current LDFLAGS
47# 52#
53#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS
55# Matches only complete flags
56#
48#### etexec-flags #### 57#### etexec-flags ####
49# hooked function for hardened-gcc that appends 58# hooked function for hardened gcc that appends
50# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed 59# -fno-pic to {C,CXX,LD}FLAGS
51# and a package is filtering -fPIC 60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
52# 61#
53#### fstack-flags #### 62#### fstack-flags ####
54# hooked function for hardened-gcc that appends 63# hooked function for hardened gcc that appends
55# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed 64# -fno-stack-protector to {C,CXX,LD}FLAGS
56# and a package is filtering -fstack-protector 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
57# 68#
58 69
59# C[XX]FLAGS that we allow in strip-flags 70# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then
60ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
61case "${ARCH}" in 74 case "${ARCH}" in
62 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
63 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
64 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
65esac 80 esac
81 fi
66 82
67# C[XX]FLAGS that we are think is ok, but needs testing 83 # C[XX]FLAGS that we are think is ok, but needs testing
68# NOTE: currently -Os have issues with gcc3 and K6* arch's 84 # NOTE: currently -Os have issues with gcc3 and K6* arch's
69UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
70 86 return 0
71filter-mfpmath() {
72 for a in $CFLAGS; do
73 if [ "${a:0:8}" == "-mfpmath" ]; then
74 orig_mfpmath=$a
75 fi
76 done
77
78 mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
79 for b in $@; do
80 mfpmath="${mfpmath/$b}"
81 done
82
83 if [ -z "${mfpmath/ }" ]; then
84 filter-flags "$orig_mfpmath"
85 else
86 new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
87 replace-flags "$orig_mfpmath" "$new_mfpmath"
88 fi
89} 87}
90 88
91filter-flags() { 89filter-flags() {
92 # we do two loops to avoid the first and last char from being chomped. 90 local x f fset
91 declare -a new_CFLAGS new_CXXFLAGS
92
93 for x in $@ ; do 93 for x in "$@" ; do
94 case "${x}" in 94 case "${x}" in
95 -fPIC) etexec-flags;; 95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
96 -fstack-protector) fstack-flags;; 96 -fstack-protector|-fstack-protector-all) fstack-flags;;
97 *) ;;
98 esac 97 esac
99 done 98 done
99
100 for fset in CFLAGS CXXFLAGS; do
101 for f in ${!fset}; do
102 for x in "$@"; do
103 # Note this should work with globs like -O*
104 [[ ${f} == ${x} ]] && continue 2
105 done
106 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
107 done
108 eval export ${fset}=\${new_${fset}\[*]}
109 done
110
111 return 0
112}
113
114filter-lfs-flags() {
115 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
116}
117
118append-lfs-flags() {
119 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
120}
121
122append-flags() {
123 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 return 0
128}
129
130replace-flags() {
100 # we do this fancy spacing stuff so as to not filter 131 # we do this fancy spacing stuff so as to not filter
101 # out part of a flag ... we want flag atoms ! :D 132 # out part of a flag ... we want flag atoms ! :D
102 CFLAGS=" ${CFLAGS} " 133 CFLAGS=" ${CFLAGS} "
103 CXXFLAGS=" ${CXXFLAGS} " 134 CXXFLAGS=" ${CXXFLAGS} "
104 for x in $@ ; do
105 CFLAGS="${CFLAGS/ ${x} / }" 135 CFLAGS="${CFLAGS// ${1} / ${2} }"
106 CXXFLAGS="${CXXFLAGS/ ${x} / }" 136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
107 done
108 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
109 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
110} 139 export CFLAGS CXXFLAGS
111
112append-flags() {
113 CFLAGS="${CFLAGS} $@"
114 CXXFLAGS="${CXXFLAGS} $@"
115 for x in $@; do
116 [ "${x}" = "-fno-stack-protector" ] && fstack-flags
117 done
118 return 0 140 return 0
119} 141}
120 142
121replace-flags() { 143replace-cpu-flags() {
122 CFLAGS="${CFLAGS/${1}/${2} }" 144 local oldcpu newcpu="$1" ; shift
123 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 145 for oldcpu in "$@" ; do
146 replace-flags -march=${oldcpu} -march=${newcpu}
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
149 done
124 return 0 150 return 0
125} 151}
126 152
127is-flag() { 153is-flag() {
154 local x
155
128 for x in ${CFLAGS} ${CXXFLAGS} ; do 156 for x in ${CFLAGS} ${CXXFLAGS} ; do
129 if [ "${x}" == "$1" ] ; then 157 if [ "${x}" == "$1" ] ; then
130 echo true 158 echo true
131 return 0 159 return 0
132 fi 160 fi
133 done 161 done
134 return 1 162 return 1
135} 163}
136 164
165filter-mfpmath() {
166 local orig_mfpmath new_math prune_math
167
168 # save the original -mfpmath flag
169 orig_mfpmath="`get-flag -mfpmath`"
170 # get the value of the current -mfpmath flag
171 new_math=" `get-flag mfpmath | tr , ' '` "
172 # figure out which math values are to be removed
173 prune_math=""
174 for prune_math in "$@" ; 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
137strip-flags() { 191strip-flags() {
192 local x y flag NEW_CFLAGS NEW_CXXFLAGS
193
194 setup-allowed-flags
195
138 local NEW_CFLAGS="" 196 local NEW_CFLAGS=""
139 local NEW_CXXFLAGS="" 197 local NEW_CXXFLAGS=""
140 198
141 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 199 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
142 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
143 [ `use debug` ] && einfo "Enabling the use of some unstable flags" 201 use debug && einfo "Enabling the use of some unstable flags"
144 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
145 fi 203 fi
146 204
147 set -f 205 set -f # disable pathname expansion
148 206
149 for x in ${CFLAGS} 207 for x in ${CFLAGS}; do
150 do
151 for y in ${ALLOWED_FLAGS} 208 for y in ${ALLOWED_FLAGS}; do
152 do
153 flag=${x%%=*} 209 flag=${x%%=*}
154 if [ "${flag%%${y}}" = "" ] 210 if [ "${flag%%${y}}" = "" ]; then
155 then
156 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 211 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
157 break 212 break
158 fi 213 fi
159 done 214 done
160 done 215 done
161 216
162 for x in ${CXXFLAGS} 217 for x in ${CXXFLAGS}; do
163 do
164 for y in ${ALLOWED_FLAGS} 218 for y in ${ALLOWED_FLAGS}; do
165 do
166 flag=${x%%=*} 219 flag=${x%%=*}
167 if [ "${flag%%${y}}" = "" ] 220 if [ "${flag%%${y}}" = "" ]; then
168 then
169 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
170 break 222 break
171 fi 223 fi
172 done 224 done
173 done 225 done
178 fi 230 fi
179 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 231 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
180 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 232 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
181 fi 233 fi
182 234
183 set +f 235 set +f # re-enable pathname expansion
184
185 [ `use debug` ] \
186 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
187 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
188 236
189 export CFLAGS="${NEW_CFLAGS}" 237 export CFLAGS="${NEW_CFLAGS}"
190 export CXXFLAGS="${NEW_CXXFLAGS}" 238 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0
191} 240}
192 241
193test_flag () { 242test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *}
194 if gcc -S -xc $1 -o /dev/null /dev/null >/dev/null 2>&1; then 244 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
195 echo "$1" 245 printf "%s\n" "$*"
246 return 0
247 fi
248 return 1
249}
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
196 fi 257 fi
197} 258}
198 259
199strip-unsupported-flags() { 260strip-unsupported-flags() {
261 local NEW_CFLAGS NEW_CXXFLAGS
262
200 for x in ${CFLAGS} 263 for x in ${CFLAGS} ; do
201 do
202 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 264 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
203 done 265 done
204
205 for x in ${CXXFLAGS} 266 for x in ${CXXFLAGS} ; do
206 do
207 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 267 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
208 done 268 done
209 269
210 CFLAGS="${NEW_CFLAGS}" 270 export CFLAGS="${NEW_CFLAGS}"
211 CXXFLAGS="${NEW_CXXFLAGS}" 271 export CXXFLAGS="${NEW_CXXFLAGS}"
212} 272}
213 273
214get-flag() { 274get-flag() {
215 local findflag="$1" 275 local f findflag="$1"
276
277 # this code looks a little flaky but seems to work for
278 # everything we want ...
279 # for example, if CFLAGS="-march=i686":
280 # `get-flag -march` == "-march=i686"
281 # `get-flag march` == "i686"
216 for f in ${CFLAGS} ${CXXFLAGS} ; do 282 for f in ${CFLAGS} ${CXXFLAGS} ; do
217 if [ "${f/${findflag}}" != "${f}" ] ; then 283 if [ "${f/${findflag}}" != "${f}" ] ; then
218 echo "${f/-${findflag}=}" 284 printf "%s\n" "${f/-${findflag}=}"
219 return 0 285 return 0
220 fi 286 fi
221 done 287 done
222 return 1 288 return 1
223} 289}
224 290
291has_hardened() {
292 test_version_info Hardened
293 return $?
294}
295
296has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
299 test_version_info pie && return 0
300 return 1
301}
302
303has_pie() {
304 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
305 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
306 test_version_info pie && return 0
307 return 1
308}
309
310has_ssp() {
311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
312 test_version_info 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
341 return 1
342}
343
225replace-sparc64-flags() { 344replace-sparc64-flags() {
226 local SPARC64_CPUS="ultrasparc v9" 345 local SPARC64_CPUS="ultrasparc v9"
227 346
228 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
229 then
230 for x in ${SPARC64_CPUS} 348 for x in ${SPARC64_CPUS}; do
231 do
232 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
233 done 350 done
234 else 351 else
235 for x in ${SPARC64_CPUS} 352 for x in ${SPARC64_CPUS}; do
236 do
237 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
238 done 354 done
239 fi 355 fi
240 356
241 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
242 then
243 for x in ${SPARC64_CPUS} 358 for x in ${SPARC64_CPUS}; do
244 do
245 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
246 done 360 done
247 else 361 else
248 for x in ${SPARC64_CPUS} 362 for x in ${SPARC64_CPUS}; do
249 do
250 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 363 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
251 done 364 done
252 fi 365 fi
366
367 export CFLAGS CXXFLAGS
253} 368}
254 369
255append-ldflags() { 370append-ldflags() {
371 export LDFLAGS="${LDFLAGS} $*"
372 return 0
373}
374
375filter-ldflags() {
376 local x
377
378 # we do this fancy spacing stuff so as to not filter
379 # out part of a flag ... we want flag atoms ! :D
256 LDFLAGS="${LDFLAGS} $@" 380 LDFLAGS=" ${LDFLAGS} "
381 for x in "$@" ; do
382 LDFLAGS="${LDFLAGS// ${x} / }"
383 done
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
385 export LDFLAGS
257 return 0 386 return 0
258} 387}
259 388
260etexec-flags() { 389etexec-flags() {
261 has_version 'sys-devel/hardened-gcc' && { 390 # if you're not using a hardened compiler you wont need this
262 debug-print ">>> appending flags -yet_exec" 391 # PIC/no-pic kludge in the first place.
263 append-flags -yet_exec 392 has_hardened || return 0
264 append-ldflags -yet_exec 393
265 } 394 if has_pie || has_pic; then
395 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] &&
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
399 fi
400 return 0
266} 401}
267 402
268fstack-flags() { 403fstack-flags() {
269 has_version 'sys-devel/hardened-gcc' && { 404 if has_ssp; then
270 debug-print ">>> appending flags -yno_propolice" 405 [ -z "`is-flag -fno-stack-protector`" ] &&
271 append-flags -yno_propolice 406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
272 append-ldflags -yno_propolice 407 fi
273 } 408 return 0
274} 409}

Legend:
Removed from v.1.30  
changed lines
  Added in v.1.62

  ViewVC Help
Powered by ViewVC 1.1.20