/[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 1.15 Revision 1.88
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2005 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 1.15 2003/04/06 23:35:41 method Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.88 2005/07/06 20:20:03 agriffis Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS" 5INHERITED="$INHERITED $ECLASS"
9 6
7# need access to emktemp()
8inherit eutils toolchain-funcs multilib
9
10# 10#
11#### filter-flags <flag> #### 11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
13# 14#
14#### append-flags <flag> #### 15#### append-flags <flags> ####
15# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
16# 17#
17#### replace-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
18# Replace a flag by another one 19# Replace a flag by another one
19# 20#
21#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
20#### is-flag <flag> #### 25#### is-flag <flag> ####
21# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
22# Matches only complete flag 27# Matches only complete a flag
23# 28#
24#### strip-flags #### 29#### strip-flags ####
25# Strip C[XX]FLAGS of everything except known 30# Strip C[XX]FLAGS of everything except known
26# good options. 31# good options.
27# 32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
28#### get-flag <flag> #### 37#### get-flag <flag> ####
29# Find and echo the value for a particular flag 38# Find and echo the value for a particular flag
30# 39#
40#### replace-sparc64-flags ####
41# Sets mcpu to v8 and uses the original value
42# as mtune if none specified.
43#
44#### filter-mfpmath <math types> ####
45# Remove specified math types from the fpmath specification
46# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
47# will leave the user with -mfpmath=386
48#
49#### append-ldflags ####
50# Add extra flags to your current LDFLAGS
51#
52#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS
54# Matches only complete flags
55#
56#### fstack-flags ####
57# hooked function for hardened gcc that appends
58# -fno-stack-protector to {C,CXX,LD}FLAGS
59# when a package is filtering -fstack-protector, -fstack-protector-all
60# notice: modern automatic specs files will also suppress -fstack-protector-all
61# when only -fno-stack-protector is given
62#
63#### has_pic ####
64# Returns true if the compiler by default or with current CFLAGS
65# builds position-independent code.
66#
67#### has_ssp_all ####
68# Returns true if the compiler by default or with current CFLAGS
69# generates stack smash protections for all functions
70#
71#### has_ssp ####
72# Returns true if the compiler by default or with current CFLAGS
73# generates stack smash protections for most vulnerable functions
74#
31 75
32ALLOWED_FLAGS="-O -mcpu -march -mtune -fstack-protector -pipe -g" 76# C[XX]FLAGS that we allow in strip-flags
77setup-allowed-flags() {
78 if [[ -z ${ALLOWED_FLAGS} ]] ; then
79 export ALLOWED_FLAGS="-pipe"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
84 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
85 fi
86 # allow a bunch of flags that negate features / control ABI
87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
88 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
89 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
90 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
91 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
92 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
93 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
94 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
33 95
96 # C[XX]FLAGS that we are think is ok, but needs testing
97 # NOTE: currently -Os have issues with gcc3 and K6* arch's
98 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
99 return 0
100}
34 101
35filter-flags () { 102filter-flags() {
103 local x f fset
104 declare -a new_CFLAGS new_CXXFLAGS
36 105
37 for x in $1 106 for x in "$@" ; do
107 case "${x}" in
108 -fPIC|-fpic|-fPIE|-fpie|-pie)
109 append-flags `test_flag -fno-pie`;;
110 -fstack-protector|-fstack-protector-all)
111 fstack-flags;;
112 esac
38 do 113 done
39 export CFLAGS="${CFLAGS/${x}}" 114
40 export CXXFLAGS="${CXXFLAGS/${x}}" 115 for fset in CFLAGS CXXFLAGS; do
116 # Looping over the flags instead of using a global
117 # substitution ensures that we're working with flag atoms.
118 # Otherwise globs like -O* have the potential to wipe out the
119 # list of flags.
120 for f in ${!fset}; do
121 for x in "$@"; do
122 # Note this should work with globs like -O*
123 [[ ${f} == ${x} ]] && continue 2
124 done
125 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
41 done 126 done
127 eval export ${fset}=\${new_${fset}\[*]}
128 done
42 129
130 return 0
43} 131}
44 132
133filter-lfs-flags() {
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135}
136
137append-lfs-flags() {
138 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
139}
140
45append-flags () { 141append-flags() {
46 142 [[ -z $* ]] && return 0
47 CFLAGS="${CFLAGS} $1" 143 export CFLAGS="${CFLAGS} $*"
48 CXXFLAGS="${CXXFLAGS} $1" 144 export CXXFLAGS="${CXXFLAGS} $*"
49 145 [ -n "`is-flag -fno-stack-protector`" -o \
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
147 return 0
50} 148}
51 149
52replace-flags () { 150replace-flags() {
151 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS
53 153
54 CFLAGS="${CFLAGS/${1}/${2} }" 154 for fset in CFLAGS CXXFLAGS; do
55 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 155 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms.
157 # Otherwise globs like -O* have the potential to wipe out the
158 # list of flags.
159 for f in ${!fset}; do
160 # Note this should work with globs like -O*
161 [[ ${f} == ${1} ]] && f=${2}
162 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
163 done
164 eval export ${fset}=\${new_${fset}\[*]}
165 done
56 166
167 return 0
168}
169
170replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift
179 done
180 return 0
57} 181}
58 182
59is-flag() { 183is-flag() {
184 local x
60 185
61 for x in ${CFLAGS} ${CXXFLAGS} 186 for x in ${CFLAGS} ${CXXFLAGS} ; do
62 do 187 # Note this should work with globs like -mcpu=ultrasparc*
63 if [ "${x}" = "$1" ] 188 if [[ ${x} == ${1} ]]; then
64 then
65 echo true 189 echo true
66 break 190 return 0
67 fi 191 fi
68 done 192 done
193 return 1
194}
69 195
196filter-mfpmath() {
197 local orig_mfpmath new_math prune_math
198
199 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`"
201 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` "
203 # figure out which math values are to be removed
204 prune_math=""
205 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }"
207 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
209
210 if [ -z "${new_math}" ] ; then
211 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath}
214 else
215 # if we only want to filter some of the user specified
216 # math values, then we replace the current flag
217 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218 fi
219 return 0
70} 220}
71 221
72strip-flags() { 222strip-flags() {
223 local x y flag NEW_CFLAGS NEW_CXXFLAGS
224
225 setup-allowed-flags
73 226
74 local NEW_CFLAGS="" 227 local NEW_CFLAGS=""
75 local NEW_CXXFLAGS="" 228 local NEW_CXXFLAGS=""
76 229
77 set -f 230 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
231 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
232 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
233 fi
78 234
235 set -f # disable pathname expansion
236
79 for x in ${CFLAGS} 237 for x in ${CFLAGS}; do
80 do
81 for y in ${ALLOWED_FLAGS} 238 for y in ${ALLOWED_FLAGS}; do
82 do
83 flag=${x%%=*} 239 flag=${x%%=*}
84 if [ "${flag%%${y}}" = "" ] 240 if [ "${flag%%${y}}" = "" ] ; then
85 then
86 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 241 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
87 break 242 break
88 fi 243 fi
89 done 244 done
90 done 245 done
91 246
92 for x in ${CXXFLAGS} 247 for x in ${CXXFLAGS}; do
93 do
94 for y in ${ALLOWED_FLAGS} 248 for y in ${ALLOWED_FLAGS}; do
95 do
96 flag=${x%%=*} 249 flag=${x%%=*}
97 if [ "${flag%%${y}}" = "" ] 250 if [ "${flag%%${y}}" = "" ] ; then
98 then
99 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 251 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
100 break 252 break
101 fi 253 fi
102 done 254 done
103 done 255 done
104 256
105 set +f 257 # In case we filtered out all optimization flags fallback to -O2
258 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
259 NEW_CFLAGS="${NEW_CFLAGS} -O2"
260 fi
261 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
262 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
263 fi
264
265 set +f # re-enable pathname expansion
106 266
107 export CFLAGS="${NEW_CFLAGS}" 267 export CFLAGS="${NEW_CFLAGS}"
108 export CXXFLAGS="${NEW_CXXFLAGS}" 268 export CXXFLAGS="${NEW_CXXFLAGS}"
269 return 0
270}
271
272test_flag() {
273 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
274 printf "%s\n" "$*"
275 return 0
276 fi
277 return 1
278}
279
280test_version_info() {
281 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
282 return 0
283 else
284 return 1
285 fi
286}
287
288strip-unsupported-flags() {
289 local NEW_CFLAGS NEW_CXXFLAGS
290
291 for x in ${CFLAGS} ; do
292 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
293 done
294 for x in ${CXXFLAGS} ; do
295 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
296 done
297
298 export CFLAGS="${NEW_CFLAGS}"
299 export CXXFLAGS="${NEW_CXXFLAGS}"
109} 300}
110 301
111get-flag() { 302get-flag() {
112 local findflag="$1" 303 local f findflag="$1"
113 304
305 # this code looks a little flaky but seems to work for
306 # everything we want ...
307 # for example, if CFLAGS="-march=i686":
308 # `get-flag -march` == "-march=i686"
309 # `get-flag march` == "i686"
114 for f in ${CFLAGS} ${CXXFLAGS} ; do 310 for f in ${CFLAGS} ${CXXFLAGS} ; do
115 if [ "${f/${findflag}}" != "${f}" ] ; then 311 if [ "${f/${findflag}}" != "${f}" ] ; then
116 echo "${f/-${findflag}=}" 312 printf "%s\n" "${f/-${findflag}=}"
117 return 313 return 0
118 fi 314 fi
119 done 315 done
316 return 1
120} 317}
318
319has_hardened() {
320 test_version_info Hardened && return 0
321 # the specs file wont exist unless gcc has GCC_SPECS support
322 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
323 return 0
324 return 1
325}
326
327# indicate whether PIC is set
328has_pic() {
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
332 return 1
333}
334
335# indicate whether PIE is set
336has_pie() {
337 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
338 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
339 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
340 # test PIC while waiting for specs to be updated to generate __PIE__
341 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
342 return 1
343}
344
345# indicate whether code for SSP is being generated for all functions
346has_ssp_all() {
347 # note; this matches only -fstack-protector-all
348 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
349 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
350 return 1
351}
352
353# indicate whether code for SSP is being generated
354has_ssp() {
355 # note; this matches both -fstack-protector and -fstack-protector-all
356 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
357 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
358 return 1
359}
360
361has_m64() {
362 # this doesnt test if the flag is accepted, it tests if the flag
363 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
364 # please dont replace this function with test_flag in some future
365 # clean-up!
366 local temp="$(emktemp)"
367 echo "int main() { return(0); }" > ${temp}.c
368 MY_CC=$(tc-getCC)
369 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
370 local ret=$?
371 rm -f ${temp}.c
372 [ "$ret" != "1" ] && return 0
373 return 1
374}
375
376has_m32() {
377 # this doesnt test if the flag is accepted, it tests if the flag
378 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
379 # please dont replace this function with test_flag in some future
380 # clean-up!
381
382 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
383
384 local temp="$(emktemp)"
385 echo "int main() { return(0); }" > ${temp}.c
386 MY_CC=$(tc-getCC)
387 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
388 local ret=$?
389 rm -f ${temp}.c
390 [ "$ret" != "1" ] && return 0
391 return 1
392}
393
394replace-sparc64-flags() {
395 local SPARC64_CPUS="ultrasparc v9"
396
397 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
398 for x in ${SPARC64_CPUS}; do
399 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
400 done
401 else
402 for x in ${SPARC64_CPUS}; do
403 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
404 done
405 fi
406
407 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
408 for x in ${SPARC64_CPUS}; do
409 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
410 done
411 else
412 for x in ${SPARC64_CPUS}; do
413 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
414 done
415 fi
416
417 export CFLAGS CXXFLAGS
418}
419
420append-ldflags() {
421 export LDFLAGS="${LDFLAGS} $*"
422 return 0
423}
424
425filter-ldflags() {
426 local x
427
428 # we do this fancy spacing stuff so as to not filter
429 # out part of a flag ... we want flag atoms ! :D
430 LDFLAGS=" ${LDFLAGS} "
431 for x in "$@" ; do
432 LDFLAGS=${LDFLAGS// ${x} / }
433 done
434 [[ -z ${LDFLAGS// } ]] \
435 && LDFLAGS="" \
436 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
437 export LDFLAGS
438 return 0
439}
440
441fstack-flags() {
442 if has_ssp; then
443 [ -z "`is-flag -fno-stack-protector`" ] &&
444 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
445 fi
446 return 0
447}
448
449# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
450# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
451# fixes.
452#
453# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
454gcc2-flags() {
455 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
456 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
457 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
458 fi
459
460 replace-cpu-flags k6-{2,3} k6
461 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
462
463 replace-cpu-flags pentium-mmx i586
464 replace-cpu-flags pentium{2,3,4} i686
465
466 replace-cpu-flags ev6{7,8} ev6
467
468 export CFLAGS CXXFLAGS
469}

Legend:
Removed from v.1.15  
changed lines
  Added in v.1.88

  ViewVC Help
Powered by ViewVC 1.1.20