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Revision 1.27 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 1.27 2003/09/24 05:51:32 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
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
20# 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>
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#
25#### strip-flags #### 30#### strip-flags ####
26# Strip C[XX]FLAGS of everything except known 31# Strip C[XX]FLAGS of everything except known
27# good options. 32# good options.
33#
34#### strip-unsupported-flags ####
35# Strip C[XX]FLAGS of any flags not supported by
36# installed version of gcc
28# 37#
29#### get-flag <flag> #### 38#### get-flag <flag> ####
30# Find and echo the value for a particular flag 39# Find and echo the value for a particular flag
31# 40#
32#### replace-sparc64-flags #### 41#### replace-sparc64-flags ####
39# will leave the user with -mfpmath=386 48# will leave the user with -mfpmath=386
40# 49#
41#### append-ldflags #### 50#### append-ldflags ####
42# Add extra flags to your current LDFLAGS 51# Add extra flags to your current LDFLAGS
43# 52#
53#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS
55# Matches only complete flags
56#
44#### etexec-flags #### 57#### etexec-flags ####
45# hooked function for hardened-gcc that appends 58# hooked function for hardened gcc that appends
46# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed 59# -fno-pic to {C,CXX,LD}FLAGS
47# and a package is filtering -fPIC 60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
48# 61#
49#### fstack-flags #### 62#### fstack-flags ####
50# hooked function for hardened-gcc that appends 63# hooked function for hardened gcc that appends
51# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed 64# -fno-stack-protector to {C,CXX,LD}FLAGS
52# 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
53# 68#
54 69
55# 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 "${ALLOWED_FLAGS}" ] ; then
56ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
57case "${ARCH}" in 74 case "${ARCH}" in
58 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
59 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
60 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
61esac 80 esac
81 fi
62 82
63# 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
64# NOTE: currently -Os have issues with gcc3 and K6* arch's 84 # NOTE: currently -Os have issues with gcc3 and K6* arch's
65UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
66 86 return 0
67filter-mfpmath() {
68 for a in $CFLAGS; do
69 if [ "${a:0:8}" == "-mfpmath" ]; then
70 orig_mfpmath=$a
71 fi
72 done
73
74 mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
75 for b in $@; do
76 mfpmath="${mfpmath/$b}"
77 done
78
79 if [ -z "${mfpmath/ }" ]; then
80 filter-flags "$orig_mfpmath"
81 else
82 new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
83 replace-flags "$orig_mfpmath" "$new_mfpmath"
84 fi
85} 87}
86 88
87filter-flags() { 89filter-flags() {
88 # 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
89 for x in $@ ; do 93 for x in "$@" ; do
90 case "${x}" in 94 case "${x}" in
91 -fPIC) etexec-flags;; 95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
92 -fstack-protector) fstack-flags;; 96 -fstack-protector|-fstack-protector-all) fstack-flags;;
93 *) ;;
94 esac 97 esac
95 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() {
96 # we do this fancy spacing stuff so as to not filter 131 # we do this fancy spacing stuff so as to not filter
97 # out part of a flag ... we want flag atoms ! :D 132 # out part of a flag ... we want flag atoms ! :D
98 CFLAGS=" ${CFLAGS} " 133 CFLAGS=" ${CFLAGS} "
99 CXXFLAGS=" ${CXXFLAGS} " 134 CXXFLAGS=" ${CXXFLAGS} "
100 for x in $@ ; do
101 CFLAGS="${CFLAGS/ ${x} / }" 135 CFLAGS="${CFLAGS// ${1} / ${2} }"
102 CXXFLAGS="${CXXFLAGS/ ${x} / }" 136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
103 done
104 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
105 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
139 export CFLAGS CXXFLAGS
140 return 0
106} 141}
107 142
108append-flags() {
109 CFLAGS="${CFLAGS} $@"
110 CXXFLAGS="${CXXFLAGS} $@"
111 for x in $@; do
112 [ "${x}" = "-fno-stack-protector" ] &&
113 fstack-flags
114 done
115}
116
117replace-flags() { 143replace-cpu-flags() {
118 CFLAGS="${CFLAGS/${1}/${2} }" 144 local oldcpu newcpu="$1" ; shift
119 CXXFLAGS="${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
150 return 0
120} 151}
121 152
122is-flag() { 153is-flag() {
154 local x
155
123 for x in ${CFLAGS} ${CXXFLAGS} ; do 156 for x in ${CFLAGS} ${CXXFLAGS} ; do
124 if [ "${x}" == "$1" ] ; then 157 if [ "${x}" == "$1" ] ; then
125 echo true 158 echo true
126 return 0 159 return 0
127 fi 160 fi
128 done 161 done
129 return 1 162 return 1
130} 163}
131 164
165filter-mfpmath() {
166 local orig_mfpmath new_math prune_math
167
168 # save the original -mfpmath flag
169 orig_mfpmath="`get-flag -mfpmath`"
170 # get the value of the current -mfpmath flag
171 new_math=" `get-flag mfpmath | tr , ' '` "
172 # figure out which math values are to be removed
173 prune_math=""
174 for prune_math in "$@" ; 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
132strip-flags() { 191strip-flags() {
192 local x y flag NEW_CFLAGS NEW_CXXFLAGS
193
194 setup-allowed-flags
195
133 local NEW_CFLAGS="" 196 local NEW_CFLAGS=""
134 local NEW_CXXFLAGS="" 197 local NEW_CXXFLAGS=""
135 198
136 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 199 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
137 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
138 [ `use debug` ] && einfo "Enabling the use of some unstable flags" 201 use debug && einfo "Enabling the use of some unstable flags"
139 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
140 fi 203 fi
141 204
142 set -f 205 set -f # disable pathname expansion
143 206
144 for x in ${CFLAGS} 207 for x in ${CFLAGS}; do
145 do
146 for y in ${ALLOWED_FLAGS} 208 for y in ${ALLOWED_FLAGS}; do
147 do
148 flag=${x%%=*} 209 flag=${x%%=*}
149 if [ "${flag%%${y}}" = "" ] 210 if [ "${flag%%${y}}" = "" ]; then
150 then
151 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 211 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
152 break 212 break
153 fi 213 fi
154 done 214 done
155 done 215 done
156 216
157 for x in ${CXXFLAGS} 217 for x in ${CXXFLAGS}; do
158 do
159 for y in ${ALLOWED_FLAGS} 218 for y in ${ALLOWED_FLAGS}; do
160 do
161 flag=${x%%=*} 219 flag=${x%%=*}
162 if [ "${flag%%${y}}" = "" ] 220 if [ "${flag%%${y}}" = "" ]; then
163 then
164 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
165 break 222 break
166 fi 223 fi
167 done 224 done
168 done 225 done
169 226
170 set +f 227 # In case we filtered out all optimization flags fallback to -O2
228 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
229 NEW_CFLAGS="${NEW_CFLAGS} -O2"
230 fi
231 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
232 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
233 fi
171 234
172 [ `use debug` ] \ 235 set +f # re-enable pathname expansion
173 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
174 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
175 236
176 export CFLAGS="${NEW_CFLAGS}" 237 export CFLAGS="${NEW_CFLAGS}"
177 export CXXFLAGS="${NEW_CXXFLAGS}" 238 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0
240}
241
242test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *}
244 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
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
257 fi
258}
259
260strip-unsupported-flags() {
261 local NEW_CFLAGS NEW_CXXFLAGS
262
263 for x in ${CFLAGS} ; do
264 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
265 done
266 for x in ${CXXFLAGS} ; do
267 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
268 done
269
270 export CFLAGS="${NEW_CFLAGS}"
271 export CXXFLAGS="${NEW_CXXFLAGS}"
178} 272}
179 273
180get-flag() { 274get-flag() {
181 local findflag="$1" 275 local f findflag="$1"
182 276
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"
183 for f in ${CFLAGS} ${CXXFLAGS} ; do 282 for f in ${CFLAGS} ${CXXFLAGS} ; do
184 if [ "${f/${findflag}}" != "${f}" ] ; then 283 if [ "${f/${findflag}}" != "${f}" ] ; then
185 echo "${f/-${findflag}=}" 284 printf "%s\n" "${f/-${findflag}=}"
186 return 285 return 0
187 fi 286 fi
188 done 287 done
288 return 1
289}
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
189} 342}
190 343
191replace-sparc64-flags() { 344replace-sparc64-flags() {
192 local SPARC64_CPUS="ultrasparc v9" 345 local SPARC64_CPUS="ultrasparc v9"
193 346
194 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
195 then
196 for x in ${SPARC64_CPUS} 348 for x in ${SPARC64_CPUS}; do
197 do
198 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
199 done 350 done
200 else 351 else
201 for x in ${SPARC64_CPUS} 352 for x in ${SPARC64_CPUS}; do
202 do
203 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
204 done 354 done
205 fi 355 fi
206 356
207 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
208 then
209 for x in ${SPARC64_CPUS} 358 for x in ${SPARC64_CPUS}; do
210 do
211 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
212 done 360 done
213 else 361 else
214 for x in ${SPARC64_CPUS} 362 for x in ${SPARC64_CPUS}; do
215 do
216 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 363 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
217 done 364 done
218 fi 365 fi
366
367 export CFLAGS CXXFLAGS
219} 368}
220 369
221append-ldflags() { 370append-ldflags() {
371 export LDFLAGS="${LDFLAGS} $*"
372 return 0
373}
374
375filter-ldflags() {
376 local x
377
378 # we do this fancy spacing stuff so as to not filter
379 # out part of a flag ... we want flag atoms ! :D
222 LDFLAGS="${LDFLAGS} $@" 380 LDFLAGS=" ${LDFLAGS} "
381 for x in "$@" ; do
382 LDFLAGS="${LDFLAGS// ${x} / }"
383 done
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
385 export LDFLAGS
386 return 0
223} 387}
224 388
225etexec-flags() { 389etexec-flags() {
226 has_version 'sys-devel/hardened-gcc' && { 390 # if you're not using a hardened compiler you wont need this
227 debug-print ">>> appending flags -yet_exec" 391 # PIC/no-pic kludge in the first place.
228 append-flags -yet_exec 392 has_hardened || return 0
229 append-ldflags -yet_exec 393
230 } 394 if has_pie || has_pic; then
395 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] &&
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
399 fi
400 return 0
231} 401}
232 402
233fstack-flags() { 403fstack-flags() {
234 has_version 'sys-devel/hardened-gcc' && { 404 if has_ssp; then
235 debug-print ">>> appending flags -yno_propolice" 405 [ -z "`is-flag -fno-stack-protector`" ] &&
236 append-flags -yno_propolice 406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
237 append-ldflags -yno_propolice 407 fi
238 } 408 return 0
239} 409}

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