1 |
# Copyright 1999-2005 Gentoo Foundation |
2 |
# Distributed under the terms of the GNU General Public License v2 |
3 |
# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.97 2005/12/08 21:08:48 azarah Exp $ |
4 |
|
5 |
|
6 |
# need access to emktemp() |
7 |
inherit eutils toolchain-funcs multilib |
8 |
|
9 |
# |
10 |
#### filter-flags <flags> #### |
11 |
# Remove particular flags from C[XX]FLAGS |
12 |
# Matches only complete flags |
13 |
# |
14 |
#### append-flags <flags> #### |
15 |
# Add extra flags to your current C[XX]FLAGS |
16 |
# |
17 |
#### replace-flags <orig.flag> <new.flag> ### |
18 |
# Replace a flag by another one |
19 |
# |
20 |
#### replace-cpu-flags <old.cpus> <new.cpu> ### |
21 |
# Replace march/mcpu flags that specify <old.cpus> |
22 |
# with flags that specify <new.cpu> |
23 |
# |
24 |
#### is-flag <flag> #### |
25 |
# Returns "true" if flag is set in C[XX]FLAGS |
26 |
# Matches only complete a flag |
27 |
# |
28 |
#### strip-flags #### |
29 |
# Strip C[XX]FLAGS of everything except known |
30 |
# good options. |
31 |
# |
32 |
#### strip-unsupported-flags #### |
33 |
# Strip C[XX]FLAGS of any flags not supported by |
34 |
# installed version of gcc |
35 |
# |
36 |
#### get-flag <flag> #### |
37 |
# Find and echo the value for a particular flag |
38 |
# |
39 |
#### replace-sparc64-flags #### |
40 |
# Sets mcpu to v8 and uses the original value |
41 |
# as mtune if none specified. |
42 |
# |
43 |
#### filter-mfpmath <math types> #### |
44 |
# Remove specified math types from the fpmath specification |
45 |
# If the user has -mfpmath=sse,386, running `filter-mfpmath sse` |
46 |
# will leave the user with -mfpmath=386 |
47 |
# |
48 |
#### append-ldflags #### |
49 |
# Add extra flags to your current LDFLAGS |
50 |
# |
51 |
#### filter-ldflags <flags> #### |
52 |
# Remove particular flags from LDFLAGS |
53 |
# Matches only complete flags |
54 |
# |
55 |
#### fstack-flags #### |
56 |
# hooked function for hardened gcc that appends |
57 |
# -fno-stack-protector to {C,CXX,LD}FLAGS |
58 |
# when a package is filtering -fstack-protector, -fstack-protector-all |
59 |
# notice: modern automatic specs files will also suppress -fstack-protector-all |
60 |
# when only -fno-stack-protector is given |
61 |
# |
62 |
#### bindnow-flags #### |
63 |
# Returns the flags to enable "now" binding in the current selected linker. |
64 |
# |
65 |
################ DEPRECATED functions ################ |
66 |
# The following are still present to avoid breaking existing |
67 |
# code more than necessary; however they are deprecated. Please |
68 |
# use gcc-specs-* from toolchain-funcs.eclass instead, if you |
69 |
# need to know which hardened techs are active in the compiler. |
70 |
# See bug #100974 |
71 |
# |
72 |
#### has_hardened #### |
73 |
# Returns true if the compiler has 'Hardened' in its version string, |
74 |
# (note; switched-spec vanilla compilers satisfy this condition) or |
75 |
# the specs file name contains 'hardened'. |
76 |
# |
77 |
#### has_pie #### |
78 |
# Returns true if the compiler by default or with current CFLAGS |
79 |
# builds position-independent code. |
80 |
# |
81 |
#### has_pic #### |
82 |
# Returns true if the compiler by default or with current CFLAGS |
83 |
# builds position-independent code. |
84 |
# |
85 |
#### has_ssp_all #### |
86 |
# Returns true if the compiler by default or with current CFLAGS |
87 |
# generates stack smash protections for all functions |
88 |
# |
89 |
#### has_ssp #### |
90 |
# Returns true if the compiler by default or with current CFLAGS |
91 |
# generates stack smash protections for most vulnerable functions |
92 |
# |
93 |
|
94 |
# C[XX]FLAGS that we allow in strip-flags |
95 |
setup-allowed-flags() { |
96 |
if [[ -z ${ALLOWED_FLAGS} ]] ; then |
97 |
export ALLOWED_FLAGS="-pipe" |
98 |
export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" |
99 |
export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" |
100 |
export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" |
101 |
export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" |
102 |
export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" |
103 |
fi |
104 |
# allow a bunch of flags that negate features / control ABI |
105 |
ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" |
106 |
ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ |
107 |
-mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ |
108 |
-mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ |
109 |
-msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ |
110 |
-mieee -mieee-with-inexact \ |
111 |
-mtls-direct-seg-refs -mno-tls-direct-seg-refs \ |
112 |
-mflat -mno-flat -mno-faster-structs -mfaster-structs \ |
113 |
-m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ |
114 |
-mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" |
115 |
|
116 |
# C[XX]FLAGS that we are think is ok, but needs testing |
117 |
# NOTE: currently -Os have issues with gcc3 and K6* arch's |
118 |
export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" |
119 |
return 0 |
120 |
} |
121 |
|
122 |
filter-flags() { |
123 |
local x f fset |
124 |
declare -a new_CFLAGS new_CXXFLAGS |
125 |
|
126 |
for x in "$@" ; do |
127 |
case "${x}" in |
128 |
-fPIC|-fpic|-fPIE|-fpie|-pie) |
129 |
append-flags `test_flag -fno-pie`;; |
130 |
-fstack-protector|-fstack-protector-all) |
131 |
fstack-flags;; |
132 |
esac |
133 |
done |
134 |
|
135 |
for fset in CFLAGS CXXFLAGS; do |
136 |
# Looping over the flags instead of using a global |
137 |
# substitution ensures that we're working with flag atoms. |
138 |
# Otherwise globs like -O* have the potential to wipe out the |
139 |
# list of flags. |
140 |
for f in ${!fset}; do |
141 |
for x in "$@"; do |
142 |
# Note this should work with globs like -O* |
143 |
[[ ${f} == ${x} ]] && continue 2 |
144 |
done |
145 |
eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} |
146 |
done |
147 |
eval export ${fset}=\${new_${fset}\[*]} |
148 |
done |
149 |
|
150 |
return 0 |
151 |
} |
152 |
|
153 |
filter-lfs-flags() { |
154 |
[[ -n $@ ]] && die "filter-lfs-flags takes no arguments" |
155 |
filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
156 |
} |
157 |
|
158 |
append-lfs-flags() { |
159 |
[[ -n $@ ]] && die "append-lfs-flags takes no arguments" |
160 |
append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE |
161 |
} |
162 |
|
163 |
append-flags() { |
164 |
[[ -z $* ]] && return 0 |
165 |
export CFLAGS="${CFLAGS} $*" |
166 |
export CXXFLAGS="${CXXFLAGS} $*" |
167 |
[ -n "`is-flag -fno-stack-protector`" -o \ |
168 |
-n "`is-flag -fno-stack-protector-all`" ] && fstack-flags |
169 |
return 0 |
170 |
} |
171 |
|
172 |
replace-flags() { |
173 |
[[ $# != 2 ]] \ |
174 |
&& echo && eerror "Usage: replace-flags <old flag> <new flag>" \ |
175 |
&& die "replace-flags takes 2 arguments, not $#" |
176 |
|
177 |
local f fset |
178 |
declare -a new_CFLAGS new_CXXFLAGS |
179 |
|
180 |
for fset in CFLAGS CXXFLAGS; do |
181 |
# Looping over the flags instead of using a global |
182 |
# substitution ensures that we're working with flag atoms. |
183 |
# Otherwise globs like -O* have the potential to wipe out the |
184 |
# list of flags. |
185 |
for f in ${!fset}; do |
186 |
# Note this should work with globs like -O* |
187 |
[[ ${f} == ${1} ]] && f=${2} |
188 |
eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} |
189 |
done |
190 |
eval export ${fset}=\${new_${fset}\[*]} |
191 |
done |
192 |
|
193 |
return 0 |
194 |
} |
195 |
|
196 |
replace-cpu-flags() { |
197 |
local newcpu="$#" ; newcpu="${!newcpu}" |
198 |
while [ $# -gt 1 ] ; do |
199 |
# quote to make sure that no globbing is done (particularly on |
200 |
# ${oldcpu} prior to calling replace-flags |
201 |
replace-flags "-march=${1}" "-march=${newcpu}" |
202 |
replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" |
203 |
replace-flags "-mtune=${1}" "-mtune=${newcpu}" |
204 |
shift |
205 |
done |
206 |
return 0 |
207 |
} |
208 |
|
209 |
is-flag() { |
210 |
local x |
211 |
|
212 |
for x in ${CFLAGS} ${CXXFLAGS} ; do |
213 |
# Note this should work with globs like -mcpu=ultrasparc* |
214 |
if [[ ${x} == ${1} ]]; then |
215 |
echo true |
216 |
return 0 |
217 |
fi |
218 |
done |
219 |
return 1 |
220 |
} |
221 |
|
222 |
filter-mfpmath() { |
223 |
local orig_mfpmath new_math prune_math |
224 |
|
225 |
# save the original -mfpmath flag |
226 |
orig_mfpmath="`get-flag -mfpmath`" |
227 |
# get the value of the current -mfpmath flag |
228 |
new_math=" `get-flag mfpmath | tr , ' '` " |
229 |
# figure out which math values are to be removed |
230 |
prune_math="" |
231 |
for prune_math in "$@" ; do |
232 |
new_math="${new_math/ ${prune_math} / }" |
233 |
done |
234 |
new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" |
235 |
|
236 |
if [ -z "${new_math}" ] ; then |
237 |
# if we're removing all user specified math values are |
238 |
# slated for removal, then we just filter the flag |
239 |
filter-flags ${orig_mfpmath} |
240 |
else |
241 |
# if we only want to filter some of the user specified |
242 |
# math values, then we replace the current flag |
243 |
replace-flags ${orig_mfpmath} -mfpmath=${new_math} |
244 |
fi |
245 |
return 0 |
246 |
} |
247 |
|
248 |
strip-flags() { |
249 |
local x y flag NEW_CFLAGS NEW_CXXFLAGS |
250 |
|
251 |
setup-allowed-flags |
252 |
|
253 |
local NEW_CFLAGS="" |
254 |
local NEW_CXXFLAGS="" |
255 |
|
256 |
# Allow unstable C[XX]FLAGS if we are using unstable profile ... |
257 |
if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then |
258 |
ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" |
259 |
fi |
260 |
|
261 |
set -f # disable pathname expansion |
262 |
|
263 |
for x in ${CFLAGS}; do |
264 |
for y in ${ALLOWED_FLAGS}; do |
265 |
flag=${x%%=*} |
266 |
if [ "${flag%%${y}}" = "" ] ; then |
267 |
NEW_CFLAGS="${NEW_CFLAGS} ${x}" |
268 |
break |
269 |
fi |
270 |
done |
271 |
done |
272 |
|
273 |
for x in ${CXXFLAGS}; do |
274 |
for y in ${ALLOWED_FLAGS}; do |
275 |
flag=${x%%=*} |
276 |
if [ "${flag%%${y}}" = "" ] ; then |
277 |
NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" |
278 |
break |
279 |
fi |
280 |
done |
281 |
done |
282 |
|
283 |
# In case we filtered out all optimization flags fallback to -O2 |
284 |
if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then |
285 |
NEW_CFLAGS="${NEW_CFLAGS} -O2" |
286 |
fi |
287 |
if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then |
288 |
NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" |
289 |
fi |
290 |
|
291 |
set +f # re-enable pathname expansion |
292 |
|
293 |
export CFLAGS="${NEW_CFLAGS}" |
294 |
export CXXFLAGS="${NEW_CXXFLAGS}" |
295 |
return 0 |
296 |
} |
297 |
|
298 |
test-flag-PROG() { |
299 |
local comp=$1 |
300 |
local flags="$2" |
301 |
|
302 |
[[ -z ${comp} || -z ${flags} ]] && \ |
303 |
return 1 |
304 |
|
305 |
local PROG=$(tc-get${comp}) |
306 |
${PROG} ${flags} -S -o /dev/null -xc /dev/null \ |
307 |
> /dev/null 2>&1 |
308 |
} |
309 |
|
310 |
# Returns true if C compiler support given flag |
311 |
test-flag-CC() { test-flag-PROG "CC" "$1"; } |
312 |
|
313 |
# Returns true if C++ compiler support given flag |
314 |
test-flag-CXX() { test-flag-PROG "CXX" "$1"; } |
315 |
|
316 |
test-flags() { |
317 |
local x |
318 |
|
319 |
for x in "$@" ; do |
320 |
test-flag-CC "${x}" || return 1 |
321 |
done |
322 |
|
323 |
echo "$@" |
324 |
|
325 |
return 0 |
326 |
} |
327 |
|
328 |
# Depriciated, use test-flags() |
329 |
test_flag() { |
330 |
addwrite "/dev/stderr" |
331 |
ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr |
332 |
|
333 |
test-flags "$@" |
334 |
} |
335 |
|
336 |
test_version_info() { |
337 |
if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then |
338 |
return 0 |
339 |
else |
340 |
return 1 |
341 |
fi |
342 |
} |
343 |
|
344 |
strip-unsupported-flags() { |
345 |
local x NEW_CFLAGS NEW_CXXFLAGS |
346 |
|
347 |
for x in ${CFLAGS} ; do |
348 |
NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" |
349 |
done |
350 |
for x in ${CXXFLAGS} ; do |
351 |
NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})" |
352 |
done |
353 |
|
354 |
export CFLAGS=${NEW_CFLAGS} |
355 |
export CXXFLAGS=${NEW_CXXFLAGS} |
356 |
} |
357 |
|
358 |
get-flag() { |
359 |
local f findflag="$1" |
360 |
|
361 |
# this code looks a little flaky but seems to work for |
362 |
# everything we want ... |
363 |
# for example, if CFLAGS="-march=i686": |
364 |
# `get-flag -march` == "-march=i686" |
365 |
# `get-flag march` == "i686" |
366 |
for f in ${CFLAGS} ${CXXFLAGS} ; do |
367 |
if [ "${f/${findflag}}" != "${f}" ] ; then |
368 |
printf "%s\n" "${f/-${findflag}=}" |
369 |
return 0 |
370 |
fi |
371 |
done |
372 |
return 1 |
373 |
} |
374 |
|
375 |
# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs |
376 |
has_hardened() { |
377 |
addwrite "/dev/stderr" |
378 |
ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \ |
379 |
>/dev/stderr |
380 |
|
381 |
test_version_info Hardened && return 0 |
382 |
# The specs file wont exist unless gcc has GCC_SPECS support |
383 |
[[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] |
384 |
} |
385 |
|
386 |
# DEPRECATED - use gcc-specs-pie from toolchain-funcs |
387 |
# indicate whether PIC is set |
388 |
has_pic() { |
389 |
addwrite "/dev/stderr" |
390 |
ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr |
391 |
|
392 |
[[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ |
393 |
${CFLAGS/-fpic} != ${CFLAGS} || \ |
394 |
-n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]] |
395 |
} |
396 |
|
397 |
# DEPRECATED - use gcc-specs-pie from toolchain-funcs |
398 |
# indicate whether PIE is set |
399 |
has_pie() { |
400 |
addwrite "/dev/stderr" |
401 |
ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr |
402 |
|
403 |
[[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ |
404 |
${CFLAGS/-fpie} != ${CFLAGS} || \ |
405 |
-n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \ |
406 |
-n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]] |
407 |
# test PIC while waiting for specs to be updated to generate __PIE__ |
408 |
} |
409 |
|
410 |
# DEPRECATED - use gcc-specs-ssp from toolchain-funcs |
411 |
# indicate whether code for SSP is being generated for all functions |
412 |
has_ssp_all() { |
413 |
addwrite "/dev/stderr" |
414 |
ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >/dev/stderr |
415 |
|
416 |
# note; this matches only -fstack-protector-all |
417 |
[[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ |
418 |
-n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ |
419 |
gcc-specs-ssp |
420 |
} |
421 |
|
422 |
# DEPRECATED - use gcc-specs-ssp from toolchain-funcs |
423 |
# indicate whether code for SSP is being generated |
424 |
has_ssp() { |
425 |
addwrite "/dev/stderr" |
426 |
ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >/dev/stderr |
427 |
|
428 |
# note; this matches both -fstack-protector and -fstack-protector-all |
429 |
[[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ |
430 |
-n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ |
431 |
gcc-specs-ssp |
432 |
} |
433 |
|
434 |
has_m64() { |
435 |
# this doesnt test if the flag is accepted, it tests if the flag |
436 |
# actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
437 |
# please dont replace this function with test_flag in some future |
438 |
# clean-up! |
439 |
|
440 |
local temp="$(emktemp)" |
441 |
echo "int main() { return(0); }" > "${temp}".c |
442 |
MY_CC=$(tc-getCC) |
443 |
${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
444 |
local ret=$? |
445 |
rm -f "${temp}".c |
446 |
[[ ${ret} != 1 ]] && return 0 |
447 |
return 1 |
448 |
} |
449 |
|
450 |
has_m32() { |
451 |
# this doesnt test if the flag is accepted, it tests if the flag |
452 |
# actually -WORKS-. non-multilib gcc will take both -m32 and -m64! |
453 |
# please dont replace this function with test_flag in some future |
454 |
# clean-up! |
455 |
|
456 |
[ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 |
457 |
|
458 |
local temp=$(emktemp) |
459 |
echo "int main() { return(0); }" > "${temp}".c |
460 |
MY_CC=$(tc-getCC) |
461 |
${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 |
462 |
local ret=$? |
463 |
rm -f "${temp}".c |
464 |
[[ ${ret} != 1 ]] && return 0 |
465 |
return 1 |
466 |
} |
467 |
|
468 |
replace-sparc64-flags() { |
469 |
local SPARC64_CPUS="ultrasparc3 ultrasparc v9" |
470 |
|
471 |
if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then |
472 |
for x in ${SPARC64_CPUS}; do |
473 |
CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" |
474 |
done |
475 |
else |
476 |
for x in ${SPARC64_CPUS}; do |
477 |
CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
478 |
done |
479 |
fi |
480 |
|
481 |
if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then |
482 |
for x in ${SPARC64_CPUS}; do |
483 |
CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" |
484 |
done |
485 |
else |
486 |
for x in ${SPARC64_CPUS}; do |
487 |
CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" |
488 |
done |
489 |
fi |
490 |
|
491 |
export CFLAGS CXXFLAGS |
492 |
} |
493 |
|
494 |
append-ldflags() { |
495 |
export LDFLAGS="${LDFLAGS} $*" |
496 |
return 0 |
497 |
} |
498 |
|
499 |
filter-ldflags() { |
500 |
local x |
501 |
|
502 |
# we do this fancy spacing stuff so as to not filter |
503 |
# out part of a flag ... we want flag atoms ! :D |
504 |
LDFLAGS=" ${LDFLAGS} " |
505 |
for x in "$@" ; do |
506 |
LDFLAGS=${LDFLAGS// ${x} / } |
507 |
done |
508 |
[[ -z ${LDFLAGS// } ]] \ |
509 |
&& LDFLAGS="" \ |
510 |
|| LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2} |
511 |
export LDFLAGS |
512 |
return 0 |
513 |
} |
514 |
|
515 |
fstack-flags() { |
516 |
if gcc-specs-ssp; then |
517 |
[ -z "`is-flag -fno-stack-protector`" ] && |
518 |
export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" |
519 |
fi |
520 |
return 0 |
521 |
} |
522 |
|
523 |
# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, |
524 |
# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more |
525 |
# fixes. |
526 |
# |
527 |
# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 |
528 |
gcc2-flags() { |
529 |
if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then |
530 |
CFLAGS=${CFLAGS//-mtune=/-mcpu=} |
531 |
CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} |
532 |
fi |
533 |
|
534 |
replace-cpu-flags k6-{2,3} k6 |
535 |
replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 |
536 |
|
537 |
replace-cpu-flags pentium-mmx i586 |
538 |
replace-cpu-flags pentium{2,3,4} i686 |
539 |
|
540 |
replace-cpu-flags ev6{7,8} ev6 |
541 |
|
542 |
export CFLAGS CXXFLAGS |
543 |
} |
544 |
|
545 |
# Gets the flags needed for "NOW" binding |
546 |
bindnow-flags() { |
547 |
case $($(tc-getLD) -v 2>&1 </dev/null) in |
548 |
*GNU* | *'with BFD'*) # GNU ld |
549 |
echo "-Wl,-z,now" ;; |
550 |
*Apple*) # Darwin ld |
551 |
echo "-bind_at_load" ;; |
552 |
*) |
553 |
# Some linkers just recognize -V instead of -v |
554 |
case $($(tc-getLD) -V 2>&1 </dev/null) in |
555 |
*Solaris*) # Solaris accept almost the same GNU options |
556 |
echo "-Wl,-z,now" ;; |
557 |
esac |
558 |
;; |
559 |
esac |
560 |
} |