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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 1.36 2004/02/21 07:07:56 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
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
60setup-allowed-flags() { 71setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then
61 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
62 case "${ARCH}" in 74 case "${ARCH}" in
63 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
64 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
65 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
66 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
67 esac 80 esac
81 fi
68 82
69 # 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
70 # NOTE: currently -Os have issues with gcc3 and K6* arch's 84 # NOTE: currently -Os have issues with gcc3 and K6* arch's
71 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
72 return 0 86 return 0
73} 87}
74 88
75filter-flags() { 89filter-flags() {
90 local x f fset
91 declare -a new_CFLAGS new_CXXFLAGS
92
76 for x in "$@" ; do 93 for x in "$@" ; do
77 case "${x}" in 94 case "${x}" in
78 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;; 95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
79 -fstack-protector|-fstack-protector-all) fstack-flags;; 96 -fstack-protector|-fstack-protector-all) fstack-flags;;
80 *) ;;
81 esac 97 esac
82 done 98 done
83 99
84 # we do this fancy spacing stuff so as to not filter 100 for fset in CFLAGS CXXFLAGS; do
85 # out part of a flag ... we want flag atoms ! :D 101 for f in ${!fset}; do
86 CFLAGS=" ${CFLAGS} "
87 CXXFLAGS=" ${CXXFLAGS} "
88 for x in "$@" ; do 102 for x in "$@"; do
89 CFLAGS="${CFLAGS/ ${x} / }" 103 # Note this should work with globs like -O*
90 CXXFLAGS="${CXXFLAGS/ ${x} / }" 104 [[ ${f} == ${x} ]] && continue 2
105 done
106 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
91 done 107 done
92 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 108 eval export ${fset}=\${new_${fset}\[*]}
93 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 109 done
110
94 return 0 111 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
95} 120}
96 121
97append-flags() { 122append-flags() {
98 export CFLAGS="${CFLAGS} $@" 123 export CFLAGS="${CFLAGS} $*"
99 export CXXFLAGS="${CXXFLAGS} $@" 124 export CXXFLAGS="${CXXFLAGS} $*"
100 [ "`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
101 return 0 127 return 0
102} 128}
103 129
104replace-flags() { 130replace-flags() {
105 # we do this fancy spacing stuff so as to not filter 131 # we do this fancy spacing stuff so as to not filter
106 # out part of a flag ... we want flag atoms ! :D 132 # out part of a flag ... we want flag atoms ! :D
107 CFLAGS=" ${CFLAGS} " 133 CFLAGS=" ${CFLAGS} "
108 CXXFLAGS=" ${CXXFLAGS} " 134 CXXFLAGS=" ${CXXFLAGS} "
109 CFLAGS="${CFLAGS/ ${1} / ${2} }" 135 CFLAGS="${CFLAGS// ${1} / ${2} }"
110 CXXFLAGS="${CXXFLAGS/ ${1} / ${2} }" 136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
111 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
112 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
139 export CFLAGS CXXFLAGS
140 return 0
141}
142
143replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift
145 for oldcpu in "$@" ; do
146 replace-flags -march=${oldcpu} -march=${newcpu}
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
149 done
113 return 0 150 return 0
114} 151}
115 152
116is-flag() { 153is-flag() {
154 local x
155
117 for x in ${CFLAGS} ${CXXFLAGS} ; do 156 for x in ${CFLAGS} ${CXXFLAGS} ; do
118 if [ "${x}" == "$1" ] ; then 157 if [ "${x}" == "$1" ] ; then
119 echo true 158 echo true
120 return 0 159 return 0
121 fi 160 fi
122 done 161 done
123 return 1 162 return 1
124} 163}
125 164
126filter-mfpmath() { 165filter-mfpmath() {
166 local orig_mfpmath new_math prune_math
167
127 # save the original -mfpmath flag 168 # save the original -mfpmath flag
128 local orig_mfpmath="`get-flag -mfpmath`" 169 orig_mfpmath="`get-flag -mfpmath`"
129 # get the value of the current -mfpmath flag 170 # get the value of the current -mfpmath flag
130 local new_math=" `get-flag mfpmath | tr , ' '` " 171 new_math=" `get-flag mfpmath | tr , ' '` "
131 # figure out which math values are to be removed 172 # figure out which math values are to be removed
132 local prune_math="" 173 prune_math=""
133 for prune_math in "$@" ; do 174 for prune_math in "$@" ; do
134 new_math="${new_math/ ${prune_math} / }" 175 new_math="${new_math/ ${prune_math} / }"
135 done 176 done
136 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 177 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
137 178
146 fi 187 fi
147 return 0 188 return 0
148} 189}
149 190
150strip-flags() { 191strip-flags() {
192 local x y flag NEW_CFLAGS NEW_CXXFLAGS
193
151 setup-allowed-flags 194 setup-allowed-flags
152 195
153 local NEW_CFLAGS="" 196 local NEW_CFLAGS=""
154 local NEW_CXXFLAGS="" 197 local NEW_CXXFLAGS=""
155 198
156 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 199 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
157 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
158 [ `use debug` ] && einfo "Enabling the use of some unstable flags" 201 use debug && einfo "Enabling the use of some unstable flags"
159 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
160 fi 203 fi
161 204
162 set -f 205 set -f # disable pathname expansion
163 206
164 for x in ${CFLAGS} 207 for x in ${CFLAGS}; do
165 do
166 for y in ${ALLOWED_FLAGS} 208 for y in ${ALLOWED_FLAGS}; do
167 do
168 flag=${x%%=*} 209 flag=${x%%=*}
169 if [ "${flag%%${y}}" = "" ] 210 if [ "${flag%%${y}}" = "" ]; then
170 then
171 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 211 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
172 break 212 break
173 fi 213 fi
174 done 214 done
175 done 215 done
176 216
177 for x in ${CXXFLAGS} 217 for x in ${CXXFLAGS}; do
178 do
179 for y in ${ALLOWED_FLAGS} 218 for y in ${ALLOWED_FLAGS}; do
180 do
181 flag=${x%%=*} 219 flag=${x%%=*}
182 if [ "${flag%%${y}}" = "" ] 220 if [ "${flag%%${y}}" = "" ]; then
183 then
184 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
185 break 222 break
186 fi 223 fi
187 done 224 done
188 done 225 done
193 fi 230 fi
194 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 231 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
195 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 232 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
196 fi 233 fi
197 234
198 set +f 235 set +f # re-enable pathname expansion
199
200 [ `use debug` ] \
201 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
202 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
203 236
204 export CFLAGS="${NEW_CFLAGS}" 237 export CFLAGS="${NEW_CFLAGS}"
205 export CXXFLAGS="${NEW_CXXFLAGS}" 238 export CXXFLAGS="${NEW_CXXFLAGS}"
206 return 0 239 return 0
207} 240}
208 241
209test_flag() { 242test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *}
210 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 244 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
211 echo "$@" 245 printf "%s\n" "$*"
212 return 0 246 return 0
213 fi 247 fi
214 return 1 248 return 1
215} 249}
216 250
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
217strip-unsupported-flags() { 260strip-unsupported-flags() {
261 local NEW_CFLAGS NEW_CXXFLAGS
262
218 for x in ${CFLAGS} ; do 263 for x in ${CFLAGS} ; do
219 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 264 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
220 done 265 done
221 for x in ${CXXFLAGS} ; do 266 for x in ${CXXFLAGS} ; do
222 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 267 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
223 done 268 done
224 269
225 export CFLAGS="${NEW_CFLAGS}" 270 export CFLAGS="${NEW_CFLAGS}"
226 export CXXFLAGS="${NEW_CXXFLAGS}" 271 export CXXFLAGS="${NEW_CXXFLAGS}"
227} 272}
228 273
229get-flag() { 274get-flag() {
275 local f findflag="$1"
276
230 # this code looks a little flaky but seems to work for 277 # this code looks a little flaky but seems to work for
231 # everything we want ... 278 # everything we want ...
232 # for example, if CFLAGS="-march=i686": 279 # for example, if CFLAGS="-march=i686":
233 # `get-flags -march` == "-march=i686" 280 # `get-flag -march` == "-march=i686"
234 # `get-flags march` == "i686" 281 # `get-flag march` == "i686"
235 local findflag="$1"
236 for f in ${CFLAGS} ${CXXFLAGS} ; do 282 for f in ${CFLAGS} ${CXXFLAGS} ; do
237 if [ "${f/${findflag}}" != "${f}" ] ; then 283 if [ "${f/${findflag}}" != "${f}" ] ; then
238 echo "${f/-${findflag}=}" 284 printf "%s\n" "${f/-${findflag}=}"
239 return 0 285 return 0
240 fi 286 fi
241 done 287 done
242 return 1 288 return 1
243} 289}
244 290
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
245replace-sparc64-flags() { 344replace-sparc64-flags() {
246 local SPARC64_CPUS="ultrasparc v9" 345 local SPARC64_CPUS="ultrasparc v9"
247 346
248 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
249 then
250 for x in ${SPARC64_CPUS} 348 for x in ${SPARC64_CPUS}; do
251 do
252 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
253 done 350 done
254 else 351 else
255 for x in ${SPARC64_CPUS} 352 for x in ${SPARC64_CPUS}; do
256 do
257 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
258 done 354 done
259 fi 355 fi
260 356
261 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
262 then
263 for x in ${SPARC64_CPUS} 358 for x in ${SPARC64_CPUS}; do
264 do
265 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
266 done 360 done
267 else 361 else
268 for x in ${SPARC64_CPUS} 362 for x in ${SPARC64_CPUS}; do
269 do
270 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 363 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
271 done 364 done
272 fi 365 fi
366
367 export CFLAGS CXXFLAGS
273} 368}
274 369
275append-ldflags() { 370append-ldflags() {
371 export LDFLAGS="${LDFLAGS} $*"
372 return 0
373}
374
375filter-ldflags() {
376 local x
377
378 # we do this fancy spacing stuff so as to not filter
379 # out part of a flag ... we want flag atoms ! :D
276 LDFLAGS="${LDFLAGS} $@" 380 LDFLAGS=" ${LDFLAGS} "
381 for x in "$@" ; do
382 LDFLAGS="${LDFLAGS// ${x} / }"
383 done
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
385 export LDFLAGS
277 return 0 386 return 0
278} 387}
279 388
280etexec-flags() { 389etexec-flags() {
281 has_version sys-devel/hardened-gcc 390 # if you're not using a hardened compiler you wont need this
282 if [ $? == 0 ] ; then 391 # PIC/no-pic kludge in the first place.
283 if [ "`is-flag -yet_exec`" != "true" ]; then 392 has_hardened || return 0
284 debug-print ">>> appending flags -yet_exec" 393
285 append-flags -yet_exec 394 if has_pie || has_pic; then
286 append-ldflags -yet_exec 395 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] &&
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
287 fi 399 fi
288 fi 400 return 0
289} 401}
290 402
291fstack-flags() { 403fstack-flags() {
292 has_version sys-devel/hardened-gcc 404 if has_ssp; then
293 if [ $? == 0 ] ; then 405 [ -z "`is-flag -fno-stack-protector`" ] &&
294 if [ "`is-flag -yno_propolice`" != "true" ]; then 406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
295 debug-print ">>> appending flags -yno_propolice"
296 append-flags -yno_propolice
297 append-ldflags -yno_propolice
298 fi 407 fi
299 fi 408 return 0
300} 409}

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