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Revision 1.108 - (hide annotations) (download)
Thu Jun 15 14:45:59 2006 UTC (8 years, 2 months ago) by vapier
Branch: MAIN
Changes since 1.107: +4 -3 lines
document maintainers

1 vapier 1.108 # Copyright 1999-2006 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.108 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.107 2006/04/15 00:44:16 vapier Exp $
4     #
5     # Maintainer: base-system@gentoo.org
6 vapier 1.63
7 vapier 1.72 # need access to emktemp()
8 eradicator 1.80 inherit eutils toolchain-funcs multilib
9 vapier 1.72
10 verwilst 1.2 #
11 vapier 1.18 #### filter-flags <flags> ####
12 verwilst 1.3 # Remove particular flags from C[XX]FLAGS
13 vapier 1.18 # Matches only complete flags
14 verwilst 1.2 #
15 vapier 1.18 #### append-flags <flags> ####
16 verwilst 1.3 # Add extra flags to your current C[XX]FLAGS
17     #
18 verwilst 1.4 #### replace-flags <orig.flag> <new.flag> ###
19 verwilst 1.3 # Replace a flag by another one
20     #
21 vapier 1.70 #### replace-cpu-flags <old.cpus> <new.cpu> ###
22 vapier 1.37 # Replace march/mcpu flags that specify <old.cpus>
23     # with flags that specify <new.cpu>
24     #
25 kevquinn 1.105 #### is-flag[q] <flag> ####
26 danarmak 1.7 # Returns "true" if flag is set in C[XX]FLAGS
27 vapier 1.18 # Matches only complete a flag
28 kevquinn 1.105 # q version sets return code but doesn't echo
29     #
30     #### is-ldflag[q] <flag> ####
31     # Returns "true" if flag is set in LDFLAGS
32     # Matches only complete a flag
33     # q version sets return code but doesn't echo
34 danarmak 1.7 #
35 azarah 1.8 #### strip-flags ####
36     # Strip C[XX]FLAGS of everything except known
37     # good options.
38     #
39 puggy 1.29 #### strip-unsupported-flags ####
40     # Strip C[XX]FLAGS of any flags not supported by
41     # installed version of gcc
42     #
43 vapier 1.10 #### get-flag <flag> ####
44     # Find and echo the value for a particular flag
45     #
46 joker 1.16 #### replace-sparc64-flags ####
47     # Sets mcpu to v8 and uses the original value
48     # as mtune if none specified.
49     #
50 vapier 1.26 #### filter-mfpmath <math types> ####
51     # Remove specified math types from the fpmath specification
52     # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
53     # will leave the user with -mfpmath=386
54 solar 1.27 #
55     #### append-ldflags ####
56     # Add extra flags to your current LDFLAGS
57     #
58 solar 1.41 #### filter-ldflags <flags> ####
59     # Remove particular flags from LDFLAGS
60     # Matches only complete flags
61     #
62 flameeyes 1.94 #### bindnow-flags ####
63     # Returns the flags to enable "now" binding in the current selected linker.
64 kevquinn 1.92 #
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 solar 1.86 #### 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 verwilst 1.3
94 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
95 vapier 1.36 setup-allowed-flags() {
96 vapier 1.84 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 vapier 1.76 export ALLOWED_FLAGS="-pipe"
98     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
99 vapier 1.87 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
101 kevquinn 1.105 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
102 vapier 1.76 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
103 vapier 1.107 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
104 vapier 1.44 fi
105 vapier 1.65 # allow a bunch of flags that negate features / control ABI
106     ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
107 vapier 1.87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
108     -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
109     -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
110     -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 agriffis 1.90 -mieee -mieee-with-inexact \
112 vapier 1.91 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
113 vapier 1.87 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
114     -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
115     -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
116 vapier 1.36
117     # C[XX]FLAGS that we are think is ok, but needs testing
118     # NOTE: currently -Os have issues with gcc3 and K6* arch's
119 vapier 1.106 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
120 vapier 1.36 return 0
121 aliz 1.24 }
122 verwilst 1.13
123 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
124     # the hardened compiler defaults.
125     _filter-hardened() {
126     local f
127     for f in "$@" ; do
128     case "${f}" in
129     # Ideally we should only concern ourselves with PIE flags,
130     # not -fPIC or -fpic, but too many places filter -fPIC without
131     # thinking about -fPIE.
132     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
133     gcc-specs-pie || continue
134     is-flagq -nopie || append-flags -nopie;;
135     -fstack-protector)
136     gcc-specs-ssp || continue
137     is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
138     -fstack-protector-all)
139     gcc-specs-ssp-to-all || continue
140     is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
141 solar 1.27 esac
142     done
143 kevquinn 1.105 }
144    
145     # Remove occurrences of strings from variable given in $1
146     # Strings removed are matched as globs, so for example
147     # '-O*' would remove -O1, -O2 etc.
148     _filter-var() {
149     local f x VAR VAL
150     declare -a new
151 vapier 1.36
152 kevquinn 1.105 VAR=$1
153     shift
154     eval VAL=\${${VAR}}
155     for f in ${VAL}; do
156     for x in "$@"; do
157     # Note this should work with globs like -O*
158     [[ ${f} == ${x} ]] && continue 2
159 agriffis 1.61 done
160 kevquinn 1.105 eval new\[\${\#new\[@]}]=\${f}
161 verwilst 1.1 done
162 kevquinn 1.105 eval export ${VAR}=\${new\[*]}
163     }
164 agriffis 1.61
165 kevquinn 1.105 filter-flags() {
166     _filter-hardened "$@"
167     _filter-var CFLAGS "$@"
168     _filter-var CXXFLAGS "$@"
169 vapier 1.36 return 0
170 verwilst 1.2 }
171    
172 vapier 1.40 filter-lfs-flags() {
173 vapier 1.93 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
174 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
175     }
176    
177 vapier 1.48 append-lfs-flags() {
178 vapier 1.93 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
179 vapier 1.48 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
180     }
181    
182 vapier 1.18 append-flags() {
183 solar 1.82 [[ -z $* ]] && return 0
184 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
185     export CXXFLAGS="${CXXFLAGS} $*"
186 vapier 1.28 return 0
187 verwilst 1.1 }
188    
189 vapier 1.18 replace-flags() {
190 vapier 1.93 [[ $# != 2 ]] \
191     && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
192     && die "replace-flags takes 2 arguments, not $#"
193    
194 mr_bones_ 1.83 local f fset
195 agriffis 1.64 declare -a new_CFLAGS new_CXXFLAGS
196    
197     for fset in CFLAGS CXXFLAGS; do
198     # Looping over the flags instead of using a global
199     # substitution ensures that we're working with flag atoms.
200     # Otherwise globs like -O* have the potential to wipe out the
201     # list of flags.
202     for f in ${!fset}; do
203     # Note this should work with globs like -O*
204     [[ ${f} == ${1} ]] && f=${2}
205     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
206     done
207     eval export ${fset}=\${new_${fset}\[*]}
208     done
209    
210 vapier 1.28 return 0
211 danarmak 1.7 }
212    
213 vapier 1.37 replace-cpu-flags() {
214 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
215     while [ $# -gt 1 ] ; do
216 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
217     # ${oldcpu} prior to calling replace-flags
218 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
219     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
220     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
221     shift
222 vapier 1.37 done
223     return 0
224     }
225    
226 kevquinn 1.105 is-flagq() {
227     local x
228    
229     for x in ${CFLAGS} ${CXXFLAGS} ; do
230     # Note this should work with globs like -mcpu=ultrasparc*
231     if [[ ${x} == ${1} ]]; then
232     return 0
233     fi
234     done
235     return 1
236     }
237    
238 danarmak 1.7 is-flag() {
239 kevquinn 1.105 if is-flagq ${1}; then
240     echo true
241     return 0
242     fi
243     return 1
244     }
245    
246     is-ldflagq() {
247 agriffis 1.58 local x
248    
249 kevquinn 1.105 for x in ${LDFLAGS} ; do
250 agriffis 1.67 # Note this should work with globs like -mcpu=ultrasparc*
251     if [[ ${x} == ${1} ]]; then
252 vapier 1.18 return 0
253     fi
254 danarmak 1.7 done
255 vapier 1.18 return 1
256 verwilst 1.1 }
257 azarah 1.8
258 kevquinn 1.105 is-ldflag() {
259     if is-ldflagq ${1}; then
260     echo true
261     return 0
262     fi
263     return 1
264     }
265    
266 vapier 1.36 filter-mfpmath() {
267 agriffis 1.58 local orig_mfpmath new_math prune_math
268    
269 vapier 1.36 # save the original -mfpmath flag
270 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
271 vapier 1.36 # get the value of the current -mfpmath flag
272 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
273 vapier 1.36 # figure out which math values are to be removed
274 agriffis 1.58 prune_math=""
275 vapier 1.36 for prune_math in "$@" ; do
276     new_math="${new_math/ ${prune_math} / }"
277     done
278     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
279    
280     if [ -z "${new_math}" ] ; then
281     # if we're removing all user specified math values are
282     # slated for removal, then we just filter the flag
283     filter-flags ${orig_mfpmath}
284     else
285     # if we only want to filter some of the user specified
286     # math values, then we replace the current flag
287     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
288     fi
289     return 0
290     }
291    
292 azarah 1.8 strip-flags() {
293 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
294    
295 vapier 1.36 setup-allowed-flags
296    
297 azarah 1.8 local NEW_CFLAGS=""
298     local NEW_CXXFLAGS=""
299    
300 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
301 vapier 1.84 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
302 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
303     fi
304    
305 agriffis 1.58 set -f # disable pathname expansion
306 azarah 1.8
307 agriffis 1.58 for x in ${CFLAGS}; do
308     for y in ${ALLOWED_FLAGS}; do
309 lostlogic 1.14 flag=${x%%=*}
310 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
311 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
312     break
313 azarah 1.8 fi
314     done
315     done
316    
317 agriffis 1.58 for x in ${CXXFLAGS}; do
318     for y in ${ALLOWED_FLAGS}; do
319 lostlogic 1.14 flag=${x%%=*}
320 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
321 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
322     break
323 azarah 1.8 fi
324     done
325     done
326 azarah 1.30
327     # In case we filtered out all optimization flags fallback to -O2
328     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
329     NEW_CFLAGS="${NEW_CFLAGS} -O2"
330     fi
331     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
332     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
333     fi
334 azarah 1.8
335 agriffis 1.58 set +f # re-enable pathname expansion
336 azarah 1.8
337     export CFLAGS="${NEW_CFLAGS}"
338     export CXXFLAGS="${NEW_CXXFLAGS}"
339 vapier 1.36 return 0
340 puggy 1.29 }
341    
342 azarah 1.96 test-flag-PROG() {
343     local comp=$1
344     local flags="$2"
345    
346     [[ -z ${comp} || -z ${flags} ]] && \
347     return 1
348    
349     local PROG=$(tc-get${comp})
350     ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
351     > /dev/null 2>&1
352     }
353    
354     # Returns true if C compiler support given flag
355     test-flag-CC() { test-flag-PROG "CC" "$1"; }
356    
357     # Returns true if C++ compiler support given flag
358     test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
359    
360 azarah 1.99 test-flags-PROG() {
361     local comp=$1
362     local flags
363 azarah 1.96 local x
364 azarah 1.99
365     shift
366    
367     [[ -z ${comp} ]] && \
368     return 1
369 swegener 1.101
370 azarah 1.96 for x in "$@" ; do
371 azarah 1.99 test-flag-${comp} "${x}" && flags="${flags} ${x}"
372 azarah 1.96 done
373    
374 azarah 1.99 echo "${flags}"
375 azarah 1.96
376 azarah 1.99 # Just bail if we dont have any flags
377     [[ -n ${flags} ]]
378 azarah 1.96 }
379    
380 azarah 1.99 # Returns (echo's) the given flags supported by the C compiler
381     test-flags-CC() { test-flags-PROG "CC" "$@"; }
382    
383     # Returns (echo's) the given flags supported by the C++ compiler
384     test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
385    
386     # Short-hand that should hopefully work for both C and C++ compiler, but
387 azarah 1.100 # its really only present due to the append-flags() abomination.
388 azarah 1.99 test-flags() { test-flags-CC "$@"; }
389    
390 kevquinn 1.105 # Depriciated, use test-flags()
391 vapier 1.36 test_flag() {
392 kevquinn 1.104 ewarn "test_flag: deprecated, please use test-flags()!" >&2
393 azarah 1.96
394 azarah 1.99 test-flags-CC "$@"
395 puggy 1.29 }
396    
397 agriffis 1.58 test_version_info() {
398 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
399 agriffis 1.58 return 0
400     else
401     return 1
402     fi
403     }
404    
405 puggy 1.29 strip-unsupported-flags() {
406 vapier 1.95 local x NEW_CFLAGS NEW_CXXFLAGS
407 agriffis 1.58
408 vapier 1.36 for x in ${CFLAGS} ; do
409 azarah 1.96 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
410 puggy 1.29 done
411 vapier 1.36 for x in ${CXXFLAGS} ; do
412 azarah 1.96 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
413 puggy 1.29 done
414    
415 vapier 1.95 export CFLAGS=${NEW_CFLAGS}
416     export CXXFLAGS=${NEW_CXXFLAGS}
417 azarah 1.8 }
418    
419 vapier 1.10 get-flag() {
420 agriffis 1.58 local f findflag="$1"
421    
422 vapier 1.36 # this code looks a little flaky but seems to work for
423     # everything we want ...
424     # for example, if CFLAGS="-march=i686":
425 agriffis 1.58 # `get-flag -march` == "-march=i686"
426     # `get-flag march` == "i686"
427 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
428     if [ "${f/${findflag}}" != "${f}" ] ; then
429 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
430 vapier 1.28 return 0
431 vapier 1.10 fi
432     done
433 vapier 1.28 return 1
434 joker 1.16 }
435    
436 kevquinn 1.92 # DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
437 solar 1.53 has_hardened() {
438 kevquinn 1.104 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
439 swegener 1.101
440 lv 1.69 test_version_info Hardened && return 0
441 azarah 1.96 # The specs file wont exist unless gcc has GCC_SPECS support
442     [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
443 solar 1.53 }
444    
445 kevquinn 1.92 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
446 solar 1.81 # indicate whether PIC is set
447 tseng 1.42 has_pic() {
448 kevquinn 1.104 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
449 swegener 1.101
450 azarah 1.96 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
451 kevquinn 1.105 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
452     gcc-specs-pie
453 tseng 1.42 }
454    
455 kevquinn 1.92 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
456 solar 1.81 # indicate whether PIE is set
457 mr_bones_ 1.83 has_pie() {
458 kevquinn 1.104 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
459 swegener 1.101
460 azarah 1.96 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
461 kevquinn 1.105 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
462     gcc-specs-pie
463 tseng 1.42 }
464 mr_bones_ 1.83
465 kevquinn 1.92 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466 solar 1.86 # indicate whether code for SSP is being generated for all functions
467     has_ssp_all() {
468 kevquinn 1.104 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
469 swegener 1.101
470 solar 1.86 # note; this matches only -fstack-protector-all
471 azarah 1.96 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
472     -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
473 kevquinn 1.105 gcc-specs-ssp-all
474 solar 1.86 }
475    
476 kevquinn 1.92 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
477 solar 1.81 # indicate whether code for SSP is being generated
478 tseng 1.42 has_ssp() {
479 kevquinn 1.104 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
480 swegener 1.101
481 solar 1.81 # note; this matches both -fstack-protector and -fstack-protector-all
482 azarah 1.96 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
483     -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
484     gcc-specs-ssp
485 tseng 1.42 }
486    
487 lv 1.56 has_m64() {
488 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
489     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
490     # please dont replace this function with test_flag in some future
491     # clean-up!
492 swegener 1.101
493 vapier 1.72 local temp="$(emktemp)"
494 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
495 kugelfang 1.74 MY_CC=$(tc-getCC)
496 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
497 vapier 1.72 local ret=$?
498 azarah 1.96 rm -f "${temp}".c
499     [[ ${ret} != 1 ]] && return 0
500 lv 1.62 return 1
501 lv 1.56 }
502    
503     has_m32() {
504 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
505     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
506     # please dont replace this function with test_flag in some future
507     # clean-up!
508 eradicator 1.80
509     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
510    
511 vapier 1.95 local temp=$(emktemp)
512     echo "int main() { return(0); }" > "${temp}".c
513 kugelfang 1.74 MY_CC=$(tc-getCC)
514 vapier 1.95 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
515 vapier 1.72 local ret=$?
516 vapier 1.95 rm -f "${temp}".c
517 azarah 1.96 [[ ${ret} != 1 ]] && return 0
518 lv 1.62 return 1
519 lv 1.56 }
520    
521 vapier 1.18 replace-sparc64-flags() {
522 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
523 joker 1.16
524 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
525 agriffis 1.58 for x in ${SPARC64_CPUS}; do
526 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
527     done
528 mr_bones_ 1.83 else
529 agriffis 1.58 for x in ${SPARC64_CPUS}; do
530 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
531     done
532     fi
533 mr_bones_ 1.83
534     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
535 agriffis 1.58 for x in ${SPARC64_CPUS}; do
536 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
537     done
538     else
539 agriffis 1.58 for x in ${SPARC64_CPUS}; do
540 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
541     done
542     fi
543 vapier 1.59
544     export CFLAGS CXXFLAGS
545 solar 1.27 }
546    
547     append-ldflags() {
548 kevquinn 1.105 [[ -z $* ]] && return 0
549 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
550 vapier 1.28 return 0
551 solar 1.27 }
552    
553 kevquinn 1.105 # Remove flags from LDFLAGS - it's up to the ebuild to filter
554     # CFLAGS and CXXFLAGS via filter-flags if they need to.
555 solar 1.41 filter-ldflags() {
556 kevquinn 1.105 _filter-var LDFLAGS "$@"
557 solar 1.41 return 0
558     }
559    
560 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
561     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
562     # to gcc where it needs the '-Wl,'.
563 vapier 1.102 raw-ldflags() {
564     local x input="$@"
565     [[ -z ${input} ]] && input=${LDFLAGS}
566     set --
567     for x in ${input} ; do
568 vapier 1.103 x=${x#-Wl,}
569     set -- "$@" ${x//,/ }
570 vapier 1.102 done
571     echo "$@"
572     }
573    
574 vapier 1.73 # This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
575     # bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
576     # fixes.
577     #
578     # Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
579     gcc2-flags() {
580 vapier 1.85 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
581     CFLAGS=${CFLAGS//-mtune=/-mcpu=}
582     CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
583 vapier 1.73 fi
584    
585 vapier 1.85 replace-cpu-flags k6-{2,3} k6
586     replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
587    
588     replace-cpu-flags pentium-mmx i586
589     replace-cpu-flags pentium{2,3,4} i686
590    
591     replace-cpu-flags ev6{7,8} ev6
592    
593 vapier 1.73 export CFLAGS CXXFLAGS
594     }
595 flameeyes 1.94
596     # Gets the flags needed for "NOW" binding
597     bindnow-flags() {
598     case $($(tc-getLD) -v 2>&1 </dev/null) in
599     *GNU* | *'with BFD'*) # GNU ld
600     echo "-Wl,-z,now" ;;
601     *Apple*) # Darwin ld
602     echo "-bind_at_load" ;;
603     *)
604     # Some linkers just recognize -V instead of -v
605     case $($(tc-getLD) -V 2>&1 </dev/null) in
606     *Solaris*) # Solaris accept almost the same GNU options
607     echo "-Wl,-z,now" ;;
608     esac
609     ;;
610     esac
611     }

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