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Revision 1.37 Revision 1.65
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 1.65 2004/07/27 19:25:49 vapier 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 "${ALLOWED_FLAGS}" ] ; then
65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
77 case "${ARCH}" in
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83 esac
84 fi
85 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
66 case "${ARCH}" in 87 case "${ARCH}" in
67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 88 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
71 esac 89 esac
90 ALLOWED_FLAGS="${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"
72 91
73 # C[XX]FLAGS that we are think is ok, but needs testing 92 # C[XX]FLAGS that we are think is ok, but needs testing
74 # NOTE: currently -Os have issues with gcc3 and K6* arch's 93 # NOTE: currently -Os have issues with gcc3 and K6* arch's
75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 94 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
76 return 0 95 return 0
77} 96}
78 97
79filter-flags() { 98filter-flags() {
99 local x f fset
100 declare -a new_CFLAGS new_CXXFLAGS
101
80 for x in "$@" ; do 102 for x in "$@" ; do
81 case "${x}" in 103 case "${x}" in
82 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;; 104 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
83 -fstack-protector|-fstack-protector-all) fstack-flags;; 105 -fstack-protector|-fstack-protector-all) fstack-flags;;
84 *) ;;
85 esac 106 esac
86 done 107 done
87 108
88 # we do this fancy spacing stuff so as to not filter 109 for fset in CFLAGS CXXFLAGS; do
89 # out part of a flag ... we want flag atoms ! :D 110 # Looping over the flags instead of using a global
90 CFLAGS=" ${CFLAGS} " 111 # substitution ensures that we're working with flag atoms.
91 CXXFLAGS=" ${CXXFLAGS} " 112 # Otherwise globs like -O* have the potential to wipe out the
113 # list of flags.
114 for f in ${!fset}; do
92 for x in "$@" ; do 115 for x in "$@"; do
93 CFLAGS="${CFLAGS// ${x} / }" 116 # Note this should work with globs like -O*
94 CXXFLAGS="${CXXFLAGS// ${x} / }" 117 [[ ${f} == ${x} ]] && continue 2
118 done
119 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
95 done 120 done
96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 121 eval export ${fset}=\${new_${fset}\[*]}
97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 122 done
123
98 return 0 124 return 0
125}
126
127filter-lfs-flags() {
128 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
129}
130
131append-lfs-flags() {
132 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
99} 133}
100 134
101append-flags() { 135append-flags() {
102 export CFLAGS="${CFLAGS} $@" 136 export CFLAGS="${CFLAGS} $*"
103 export CXXFLAGS="${CXXFLAGS} $@" 137 export CXXFLAGS="${CXXFLAGS} $*"
104 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 138 [ -n "`is-flag -fno-stack-protector`" -o \
139 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
105 return 0 140 return 0
106} 141}
107 142
108replace-flags() { 143replace-flags() {
109 # we do this fancy spacing stuff so as to not filter 144 local f fset
110 # out part of a flag ... we want flag atoms ! :D 145 declare -a new_CFLAGS new_CXXFLAGS
111 CFLAGS=" ${CFLAGS} " 146
112 CXXFLAGS=" ${CXXFLAGS} " 147 for fset in CFLAGS CXXFLAGS; do
113 CFLAGS="${CFLAGS// ${1} / ${2} }" 148 # Looping over the flags instead of using a global
114 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 149 # substitution ensures that we're working with flag atoms.
115 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 150 # Otherwise globs like -O* have the potential to wipe out the
116 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 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
117 return 0 160 return 0
118} 161}
119 162
120replace-cpu-flags() { 163replace-cpu-flags() {
121 local newcpu="$1" ; shift 164 local oldcpu newcpu="$1" ; shift
122 local oldcpu=""
123 for oldcpu in "$@" ; do 165 for oldcpu in "$@" ; do
166 # quote to make sure that no globbing is done (particularly on
167 # ${oldcpu} prior to calling replace-flags
124 replace-flags -march=${oldcpu} -march=${newcpu} 168 replace-flags "-march=${oldcpu}" "-march=${newcpu}"
125 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 169 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}"
170 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}"
126 done 171 done
127 return 0 172 return 0
128} 173}
129 174
130is-flag() { 175is-flag() {
176 local x
177
131 for x in ${CFLAGS} ${CXXFLAGS} ; do 178 for x in ${CFLAGS} ${CXXFLAGS} ; do
132 if [ "${x}" == "$1" ] ; then 179 if [ "${x}" == "$1" ] ; then
133 echo true 180 echo true
134 return 0 181 return 0
135 fi 182 fi
136 done 183 done
137 return 1 184 return 1
138} 185}
139 186
140filter-mfpmath() { 187filter-mfpmath() {
188 local orig_mfpmath new_math prune_math
189
141 # save the original -mfpmath flag 190 # save the original -mfpmath flag
142 local orig_mfpmath="`get-flag -mfpmath`" 191 orig_mfpmath="`get-flag -mfpmath`"
143 # get the value of the current -mfpmath flag 192 # get the value of the current -mfpmath flag
144 local new_math=" `get-flag mfpmath | tr , ' '` " 193 new_math=" `get-flag mfpmath | tr , ' '` "
145 # figure out which math values are to be removed 194 # figure out which math values are to be removed
146 local prune_math="" 195 prune_math=""
147 for prune_math in "$@" ; do 196 for prune_math in "$@" ; do
148 new_math="${new_math/ ${prune_math} / }" 197 new_math="${new_math/ ${prune_math} / }"
149 done 198 done
150 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 199 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
151 200
160 fi 209 fi
161 return 0 210 return 0
162} 211}
163 212
164strip-flags() { 213strip-flags() {
214 local x y flag NEW_CFLAGS NEW_CXXFLAGS
215
165 setup-allowed-flags 216 setup-allowed-flags
166 217
167 local NEW_CFLAGS="" 218 local NEW_CFLAGS=""
168 local NEW_CXXFLAGS="" 219 local NEW_CXXFLAGS=""
169 220
170 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 221 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
171 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 222 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
172 [ `use debug` ] && einfo "Enabling the use of some unstable flags" 223 use debug && einfo "Enabling the use of some unstable flags"
173 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 224 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
174 fi 225 fi
175 226
176 set -f 227 set -f # disable pathname expansion
177 228
178 for x in ${CFLAGS} 229 for x in ${CFLAGS}; do
179 do
180 for y in ${ALLOWED_FLAGS} 230 for y in ${ALLOWED_FLAGS}; do
181 do
182 flag=${x%%=*} 231 flag=${x%%=*}
183 if [ "${flag%%${y}}" = "" ] 232 if [ "${flag%%${y}}" = "" ] ; then
184 then
185 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 233 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
186 break 234 break
187 fi 235 fi
188 done 236 done
189 done 237 done
190 238
191 for x in ${CXXFLAGS} 239 for x in ${CXXFLAGS}; do
192 do
193 for y in ${ALLOWED_FLAGS} 240 for y in ${ALLOWED_FLAGS}; do
194 do
195 flag=${x%%=*} 241 flag=${x%%=*}
196 if [ "${flag%%${y}}" = "" ] 242 if [ "${flag%%${y}}" = "" ] ; then
197 then
198 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 243 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
199 break 244 break
200 fi 245 fi
201 done 246 done
202 done 247 done
207 fi 252 fi
208 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 253 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
209 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 254 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
210 fi 255 fi
211 256
212 set +f 257 set +f # re-enable pathname expansion
213
214 [ `use debug` ] \
215 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
216 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
217 258
218 export CFLAGS="${NEW_CFLAGS}" 259 export CFLAGS="${NEW_CFLAGS}"
219 export CXXFLAGS="${NEW_CXXFLAGS}" 260 export CXXFLAGS="${NEW_CXXFLAGS}"
220 return 0 261 return 0
221} 262}
222 263
223test_flag() { 264test_flag() {
265 local cc=${CC:-gcc} ; cc=${cc%% *}
224 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 266 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
225 echo "$@" 267 printf "%s\n" "$*"
226 return 0 268 return 0
227 fi 269 fi
228 return 1 270 return 1
229} 271}
230 272
273test_version_info() {
274 local cc=${CC:-gcc} ; cc=${cc%% *}
275 if [[ $(${cc} --version 2>&1) == *$1* ]]; then
276 return 0
277 else
278 return 1
279 fi
280}
281
231strip-unsupported-flags() { 282strip-unsupported-flags() {
283 local NEW_CFLAGS NEW_CXXFLAGS
284
232 for x in ${CFLAGS} ; do 285 for x in ${CFLAGS} ; do
233 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 286 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
234 done 287 done
235 for x in ${CXXFLAGS} ; do 288 for x in ${CXXFLAGS} ; do
236 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 289 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
237 done 290 done
238 291
239 export CFLAGS="${NEW_CFLAGS}" 292 export CFLAGS="${NEW_CFLAGS}"
240 export CXXFLAGS="${NEW_CXXFLAGS}" 293 export CXXFLAGS="${NEW_CXXFLAGS}"
241} 294}
242 295
243get-flag() { 296get-flag() {
297 local f findflag="$1"
298
244 # this code looks a little flaky but seems to work for 299 # this code looks a little flaky but seems to work for
245 # everything we want ... 300 # everything we want ...
246 # for example, if CFLAGS="-march=i686": 301 # for example, if CFLAGS="-march=i686":
247 # `get-flags -march` == "-march=i686" 302 # `get-flag -march` == "-march=i686"
248 # `get-flags march` == "i686" 303 # `get-flag march` == "i686"
249 local findflag="$1"
250 for f in ${CFLAGS} ${CXXFLAGS} ; do 304 for f in ${CFLAGS} ${CXXFLAGS} ; do
251 if [ "${f/${findflag}}" != "${f}" ] ; then 305 if [ "${f/${findflag}}" != "${f}" ] ; then
252 echo "${f/-${findflag}=}" 306 printf "%s\n" "${f/-${findflag}=}"
253 return 0 307 return 0
254 fi 308 fi
255 done 309 done
256 return 1 310 return 1
257} 311}
258 312
313has_hardened() {
314 test_version_info Hardened
315 return $?
316}
317
318has_pic() {
319 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
320 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
321 test_version_info pie && return 0
322 return 1
323}
324
325has_pie() {
326 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
327 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
328 test_version_info pie && return 0
329 return 1
330}
331
332has_ssp() {
333 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
334 test_version_info ssp && return 0
335 return 1
336}
337
338has_m64() {
339 # this doesnt test if the flag is accepted, it tests if the flag
340 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
341 # please dont replace this function with test_flag in some future
342 # clean-up!
343 temp=`mktemp`
344 echo "int main() { return(0); }" > ${temp}.c
345 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
346 ret=$?
347 rm -f ${temp}.c
348 [ "$ret" != "1" ] && return 0
349 return 1
350}
351
352has_m32() {
353 # this doesnt test if the flag is accepted, it tests if the flag
354 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
355 # please dont replace this function with test_flag in some future
356 # clean-up!
357 temp=`mktemp`
358 echo "int main() { return(0); }" > ${temp}.c
359 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
360 ret=$?
361 rm -f ${temp}.c
362 [ "$ret" != "1" ] && return 0
363 return 1
364}
365
259replace-sparc64-flags() { 366replace-sparc64-flags() {
260 local SPARC64_CPUS="ultrasparc v9" 367 local SPARC64_CPUS="ultrasparc v9"
261 368
262 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 369 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
263 then
264 for x in ${SPARC64_CPUS} 370 for x in ${SPARC64_CPUS}; do
265 do
266 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 371 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
267 done 372 done
268 else 373 else
269 for x in ${SPARC64_CPUS} 374 for x in ${SPARC64_CPUS}; do
270 do
271 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 375 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
272 done 376 done
273 fi 377 fi
274 378
275 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 379 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
276 then
277 for x in ${SPARC64_CPUS} 380 for x in ${SPARC64_CPUS}; do
278 do
279 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 381 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
280 done 382 done
281 else 383 else
282 for x in ${SPARC64_CPUS} 384 for x in ${SPARC64_CPUS}; do
283 do
284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 385 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
285 done 386 done
286 fi 387 fi
388
389 export CFLAGS CXXFLAGS
287} 390}
288 391
289append-ldflags() { 392append-ldflags() {
393 export LDFLAGS="${LDFLAGS} $*"
394 return 0
395}
396
397filter-ldflags() {
398 local x
399
400 # we do this fancy spacing stuff so as to not filter
401 # out part of a flag ... we want flag atoms ! :D
290 LDFLAGS="${LDFLAGS} $@" 402 LDFLAGS=" ${LDFLAGS} "
403 for x in "$@" ; do
404 LDFLAGS="${LDFLAGS// ${x} / }"
405 done
406 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
407 export LDFLAGS
291 return 0 408 return 0
292} 409}
293 410
294etexec-flags() { 411etexec-flags() {
295 has_version sys-devel/hardened-gcc 412 # if you're not using a hardened compiler you wont need this
296 if [ $? == 0 ] ; then 413 # PIC/no-pic kludge in the first place.
297 if [ "`is-flag -yet_exec`" != "true" ]; then 414 has_hardened || return 0
298 debug-print ">>> appending flags -yet_exec" 415
299 append-flags -yet_exec 416 if has_pie || has_pic; then
300 append-ldflags -yet_exec 417 [ -z "`is-flag -fno-pic`" ] &&
418 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
419 [ -z "`is-flag -nopie`" ] &&
420 export CFLAGS="${CFLAGS} `test_flag -nopie`"
301 fi 421 fi
302 fi 422 return 0
303} 423}
304 424
305fstack-flags() { 425fstack-flags() {
306 has_version sys-devel/hardened-gcc 426 if has_ssp; then
307 if [ $? == 0 ] ; then 427 [ -z "`is-flag -fno-stack-protector`" ] &&
308 if [ "`is-flag -yno_propolice`" != "true" ]; then 428 export CFLAGS="${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 429 fi
313 fi 430 return 0
314} 431}

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