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Revision 1.35 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 1.35 2004/01/20 10:37:19 solar 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,-fpic, -fPIE, -fpie 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, -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
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" ;;
65 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
66esac 80 esac
81 fi
67 82
68# 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
69# NOTE: currently -Os have issues with gcc3 and K6* arch's 84 # NOTE: currently -Os have issues with gcc3 and K6* arch's
70UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
71 86 return 0
72filter-mfpmath() {
73 for a in $CFLAGS; do
74 if [ "${a:0:8}" == "-mfpmath" ]; then
75 orig_mfpmath=$a
76 fi
77 done
78
79 mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
80 for b in $@; do
81 mfpmath="${mfpmath/$b}"
82 done
83
84 if [ -z "${mfpmath/ }" ]; then
85 filter-flags "$orig_mfpmath"
86 else
87 new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
88 replace-flags "$orig_mfpmath" "$new_mfpmath"
89 fi
90} 87}
91 88
92filter-flags() { 89filter-flags() {
93 # 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
94 for x in $@ ; do 93 for x in "$@" ; do
95 case "${x}" in 94 case "${x}" in
96 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;; 95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
97 -fstack-protector|-fstack-protector-all) fstack-flags;; 96 -fstack-protector|-fstack-protector-all) fstack-flags;;
98 *) ;;
99 esac 97 esac
100 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() {
101 # we do this fancy spacing stuff so as to not filter 131 # we do this fancy spacing stuff so as to not filter
102 # out part of a flag ... we want flag atoms ! :D 132 # out part of a flag ... we want flag atoms ! :D
103 CFLAGS=" ${CFLAGS} " 133 CFLAGS=" ${CFLAGS} "
104 CXXFLAGS=" ${CXXFLAGS} " 134 CXXFLAGS=" ${CXXFLAGS} "
105 for x in $@ ; do
106 CFLAGS="${CFLAGS/ ${x} / }" 135 CFLAGS="${CFLAGS// ${1} / ${2} }"
107 CXXFLAGS="${CXXFLAGS/ ${x} / }" 136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
108 done
109 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
110 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
111} 139 export CFLAGS CXXFLAGS
112
113append-flags() {
114 CFLAGS="${CFLAGS} $@"
115 CXXFLAGS="${CXXFLAGS} $@"
116 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
117 return 0 140 return 0
118} 141}
119 142
120replace-flags() { 143replace-cpu-flags() {
121 CFLAGS="${CFLAGS/${1}/${2} }" 144 local oldcpu newcpu="$1" ; shift
122 CXXFLAGS="${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
123 return 0 150 return 0
124} 151}
125 152
126is-flag() { 153is-flag() {
154 local x
155
127 for x in ${CFLAGS} ${CXXFLAGS} ; do 156 for x in ${CFLAGS} ${CXXFLAGS} ; do
128 if [ "${x}" == "$1" ] ; then 157 if [ "${x}" == "$1" ] ; then
129 echo true 158 echo true
130 return 0 159 return 0
131 fi 160 fi
132 done 161 done
133 return 1 162 return 1
134} 163}
135 164
165filter-mfpmath() {
166 local orig_mfpmath new_math prune_math
167
168 # save the original -mfpmath flag
169 orig_mfpmath="`get-flag -mfpmath`"
170 # get the value of the current -mfpmath flag
171 new_math=" `get-flag mfpmath | tr , ' '` "
172 # figure out which math values are to be removed
173 prune_math=""
174 for prune_math in "$@" ; 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
136strip-flags() { 191strip-flags() {
192 local x y flag NEW_CFLAGS NEW_CXXFLAGS
193
194 setup-allowed-flags
195
137 local NEW_CFLAGS="" 196 local NEW_CFLAGS=""
138 local NEW_CXXFLAGS="" 197 local NEW_CXXFLAGS=""
139 198
140 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 199 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
141 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
142 [ `use debug` ] && einfo "Enabling the use of some unstable flags" 201 use debug && einfo "Enabling the use of some unstable flags"
143 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
144 fi 203 fi
145 204
146 set -f 205 set -f # disable pathname expansion
147 206
148 for x in ${CFLAGS} 207 for x in ${CFLAGS}; do
149 do
150 for y in ${ALLOWED_FLAGS} 208 for y in ${ALLOWED_FLAGS}; do
151 do
152 flag=${x%%=*} 209 flag=${x%%=*}
153 if [ "${flag%%${y}}" = "" ] 210 if [ "${flag%%${y}}" = "" ]; then
154 then
155 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 211 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
156 break 212 break
157 fi 213 fi
158 done 214 done
159 done 215 done
160 216
161 for x in ${CXXFLAGS} 217 for x in ${CXXFLAGS}; do
162 do
163 for y in ${ALLOWED_FLAGS} 218 for y in ${ALLOWED_FLAGS}; do
164 do
165 flag=${x%%=*} 219 flag=${x%%=*}
166 if [ "${flag%%${y}}" = "" ] 220 if [ "${flag%%${y}}" = "" ]; then
167 then
168 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
169 break 222 break
170 fi 223 fi
171 done 224 done
172 done 225 done
177 fi 230 fi
178 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 231 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
179 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 232 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
180 fi 233 fi
181 234
182 set +f 235 set +f # re-enable pathname expansion
183
184 [ `use debug` ] \
185 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
186 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
187 236
188 export CFLAGS="${NEW_CFLAGS}" 237 export CFLAGS="${NEW_CFLAGS}"
189 export CXXFLAGS="${NEW_CXXFLAGS}" 238 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0
190} 240}
191 241
192test_flag () { 242test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *}
193 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
194 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
195 fi 257 fi
196} 258}
197 259
198strip-unsupported-flags() { 260strip-unsupported-flags() {
261 local NEW_CFLAGS NEW_CXXFLAGS
262
199 for x in ${CFLAGS} 263 for x in ${CFLAGS} ; do
200 do
201 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 264 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
202 done 265 done
203
204 for x in ${CXXFLAGS} 266 for x in ${CXXFLAGS} ; do
205 do
206 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 267 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
207 done 268 done
208 269
209 CFLAGS="${NEW_CFLAGS}" 270 export CFLAGS="${NEW_CFLAGS}"
210 CXXFLAGS="${NEW_CXXFLAGS}" 271 export CXXFLAGS="${NEW_CXXFLAGS}"
211} 272}
212 273
213get-flag() { 274get-flag() {
214 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"
215 for f in ${CFLAGS} ${CXXFLAGS} ; do 282 for f in ${CFLAGS} ${CXXFLAGS} ; do
216 if [ "${f/${findflag}}" != "${f}" ] ; then 283 if [ "${f/${findflag}}" != "${f}" ] ; then
217 echo "${f/-${findflag}=}" 284 printf "%s\n" "${f/-${findflag}=}"
218 return 0 285 return 0
219 fi 286 fi
220 done 287 done
221 return 1 288 return 1
222} 289}
223 290
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
224replace-sparc64-flags() { 344replace-sparc64-flags() {
225 local SPARC64_CPUS="ultrasparc v9" 345 local SPARC64_CPUS="ultrasparc v9"
226 346
227 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
228 then
229 for x in ${SPARC64_CPUS} 348 for x in ${SPARC64_CPUS}; do
230 do
231 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
232 done 350 done
233 else 351 else
234 for x in ${SPARC64_CPUS} 352 for x in ${SPARC64_CPUS}; do
235 do
236 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
237 done 354 done
238 fi 355 fi
239 356
240 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
241 then
242 for x in ${SPARC64_CPUS} 358 for x in ${SPARC64_CPUS}; do
243 do
244 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
245 done 360 done
246 else 361 else
247 for x in ${SPARC64_CPUS} 362 for x in ${SPARC64_CPUS}; do
248 do
249 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 363 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
250 done 364 done
251 fi 365 fi
366
367 export CFLAGS CXXFLAGS
252} 368}
253 369
254append-ldflags() { 370append-ldflags() {
371 export LDFLAGS="${LDFLAGS} $*"
372 return 0
373}
374
375filter-ldflags() {
376 local x
377
378 # we do this fancy spacing stuff so as to not filter
379 # out part of a flag ... we want flag atoms ! :D
255 LDFLAGS="${LDFLAGS} $@" 380 LDFLAGS=" ${LDFLAGS} "
381 for x in "$@" ; do
382 LDFLAGS="${LDFLAGS// ${x} / }"
383 done
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
385 export LDFLAGS
256 return 0 386 return 0
257} 387}
258 388
259etexec-flags() { 389etexec-flags() {
260 has_version sys-devel/hardened-gcc 390 # if you're not using a hardened compiler you wont need this
261 if [ $? == 0 ]; then 391 # PIC/no-pic kludge in the first place.
262 if [ "`is-flag -yet_exec`" != "true" ]; then 392 has_hardened || return 0
263 debug-print ">>> appending flags -yet_exec" 393
264 append-flags -yet_exec 394 if has_pie || has_pic; then
265 append-ldflags -yet_exec 395 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] &&
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
266 fi 399 fi
267 fi 400 return 0
268} 401}
269 402
270fstack-flags() { 403fstack-flags() {
271 has_version sys-devel/hardened-gcc 404 if has_ssp; then
272 if [ $? == 0 ]; then 405 [ -z "`is-flag -fno-stack-protector`" ] &&
273 if [ "`is-flag -yno_propolice`" != "true" ]; then 406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
274 debug-print ">>> appending flags -yno_propolice"
275 append-flags -yno_propolice
276 append-ldflags -yno_propolice
277 fi 407 fi
278 fi 408 return 0
279} 409}

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