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Revision 1.119 - (hide annotations) (download)
Sat May 12 11:45:51 2007 UTC (7 years, 7 months ago) by vapier
Branch: MAIN
Changes since 1.118: +4 -3 lines
allow -fno-strict-aliasing in strip-flags as pointed out by nyhm

1 vapier 1.116 # Copyright 1999-2007 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.119 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.118 2007/03/24 07:07:18 vapier Exp $
4 vapier 1.108 #
5 vapier 1.116 # Maintainer: toolchain@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 1.117 # Note: shell globs and character lists are allowed
96 vapier 1.36 setup-allowed-flags() {
97 vapier 1.84 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 vapier 1.76 export ALLOWED_FLAGS="-pipe"
99     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
100 vapier 1.87 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
101 vapier 1.119 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking"
102 kevquinn 1.105 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
103 vapier 1.117 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 vapier 1.107 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
105 vapier 1.44 fi
106 vapier 1.65 # allow a bunch of flags that negate features / control ABI
107 vapier 1.119 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
108     -fno-strict-aliasing -fno-bounds-checking"
109 vapier 1.87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
110     -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
111     -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
112     -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
113 vapier 1.110 -mieee -mieee-with-inexact -mschedule \
114 vapier 1.91 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
115 vapier 1.87 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
116     -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
117 vapier 1.114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
118 vapier 1.115 -msecure-plt -D*"
119 vapier 1.36
120     # C[XX]FLAGS that we are think is ok, but needs testing
121     # NOTE: currently -Os have issues with gcc3 and K6* arch's
122 vapier 1.106 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
123 vapier 1.36 return 0
124 aliz 1.24 }
125 verwilst 1.13
126 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
127     # the hardened compiler defaults.
128     _filter-hardened() {
129     local f
130     for f in "$@" ; do
131     case "${f}" in
132     # Ideally we should only concern ourselves with PIE flags,
133     # not -fPIC or -fpic, but too many places filter -fPIC without
134     # thinking about -fPIE.
135     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
136     gcc-specs-pie || continue
137     is-flagq -nopie || append-flags -nopie;;
138     -fstack-protector)
139     gcc-specs-ssp || continue
140     is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
141     -fstack-protector-all)
142     gcc-specs-ssp-to-all || continue
143     is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
144 solar 1.27 esac
145     done
146 kevquinn 1.105 }
147    
148     # Remove occurrences of strings from variable given in $1
149     # Strings removed are matched as globs, so for example
150     # '-O*' would remove -O1, -O2 etc.
151     _filter-var() {
152     local f x VAR VAL
153     declare -a new
154 vapier 1.36
155 kevquinn 1.105 VAR=$1
156     shift
157     eval VAL=\${${VAR}}
158     for f in ${VAL}; do
159     for x in "$@"; do
160     # Note this should work with globs like -O*
161     [[ ${f} == ${x} ]] && continue 2
162 agriffis 1.61 done
163 kevquinn 1.105 eval new\[\${\#new\[@]}]=\${f}
164 verwilst 1.1 done
165 kevquinn 1.105 eval export ${VAR}=\${new\[*]}
166     }
167 agriffis 1.61
168 kevquinn 1.105 filter-flags() {
169     _filter-hardened "$@"
170     _filter-var CFLAGS "$@"
171 vapier 1.118 _filter-var CPPFLAGS "$@"
172 kevquinn 1.105 _filter-var CXXFLAGS "$@"
173 vapier 1.36 return 0
174 verwilst 1.2 }
175    
176 vapier 1.40 filter-lfs-flags() {
177 vapier 1.93 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
178 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179     }
180    
181 vapier 1.118 append-cppflags() {
182     [[ -z $* ]] && return 0
183     export CPPFLAGS="${CPPFLAGS} $*"
184     return 0
185     }
186    
187 vapier 1.48 append-lfs-flags() {
188 vapier 1.93 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
189 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
190 vapier 1.48 }
191    
192 vapier 1.18 append-flags() {
193 solar 1.82 [[ -z $* ]] && return 0
194 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
195     export CXXFLAGS="${CXXFLAGS} $*"
196 vapier 1.28 return 0
197 verwilst 1.1 }
198    
199 vapier 1.18 replace-flags() {
200 vapier 1.93 [[ $# != 2 ]] \
201     && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
202     && die "replace-flags takes 2 arguments, not $#"
203    
204 mr_bones_ 1.83 local f fset
205 agriffis 1.64 declare -a new_CFLAGS new_CXXFLAGS
206    
207     for fset in CFLAGS CXXFLAGS; do
208     # Looping over the flags instead of using a global
209     # substitution ensures that we're working with flag atoms.
210     # Otherwise globs like -O* have the potential to wipe out the
211     # list of flags.
212     for f in ${!fset}; do
213     # Note this should work with globs like -O*
214     [[ ${f} == ${1} ]] && f=${2}
215     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
216     done
217     eval export ${fset}=\${new_${fset}\[*]}
218     done
219    
220 vapier 1.28 return 0
221 danarmak 1.7 }
222    
223 vapier 1.37 replace-cpu-flags() {
224 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
225     while [ $# -gt 1 ] ; do
226 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
227 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
228 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
229     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
230     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
231     shift
232 vapier 1.37 done
233     return 0
234     }
235    
236 vapier 1.113 _is_flagq() {
237 kevquinn 1.105 local x
238 vapier 1.113 for x in ${!1} ; do
239     [[ ${x} == $2 ]] && return 0
240 kevquinn 1.105 done
241     return 1
242     }
243    
244 vapier 1.113 is-flagq() {
245     [[ -n $2 ]] && die "Usage: is-flag <flag>"
246     _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
247     }
248    
249 danarmak 1.7 is-flag() {
250 vapier 1.113 is-flagq "$@" && echo true
251 kevquinn 1.105 }
252    
253     is-ldflagq() {
254 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
255     _is_flagq LDFLAGS $1
256 verwilst 1.1 }
257 azarah 1.8
258 kevquinn 1.105 is-ldflag() {
259 vapier 1.113 is-ldflagq "$@" && echo true
260 kevquinn 1.105 }
261    
262 vapier 1.36 filter-mfpmath() {
263 agriffis 1.58 local orig_mfpmath new_math prune_math
264    
265 vapier 1.36 # save the original -mfpmath flag
266 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
267 vapier 1.36 # get the value of the current -mfpmath flag
268 vapier 1.109 new_math=$(get-flag mfpmath)
269     new_math=" ${new_math//,/ } "
270 vapier 1.36 # figure out which math values are to be removed
271 agriffis 1.58 prune_math=""
272 vapier 1.36 for prune_math in "$@" ; do
273 vapier 1.109 new_math=${new_math/ ${prune_math} / }
274 vapier 1.36 done
275 vapier 1.109 new_math=$(echo ${new_math})
276     new_math=${new_math// /,}
277 vapier 1.36
278 vapier 1.109 if [[ -z ${new_math} ]] ; then
279 vapier 1.36 # if we're removing all user specified math values are
280     # slated for removal, then we just filter the flag
281     filter-flags ${orig_mfpmath}
282     else
283     # if we only want to filter some of the user specified
284     # math values, then we replace the current flag
285     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286     fi
287     return 0
288     }
289    
290 azarah 1.8 strip-flags() {
291 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
292    
293 vapier 1.36 setup-allowed-flags
294    
295 azarah 1.8 local NEW_CFLAGS=""
296     local NEW_CXXFLAGS=""
297    
298 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
299 vapier 1.84 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
300 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301     fi
302    
303 agriffis 1.58 set -f # disable pathname expansion
304 azarah 1.8
305 agriffis 1.58 for x in ${CFLAGS}; do
306     for y in ${ALLOWED_FLAGS}; do
307 lostlogic 1.14 flag=${x%%=*}
308 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
309 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
310     break
311 azarah 1.8 fi
312     done
313     done
314    
315 agriffis 1.58 for x in ${CXXFLAGS}; do
316     for y in ${ALLOWED_FLAGS}; do
317 lostlogic 1.14 flag=${x%%=*}
318 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
319 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
320     break
321 azarah 1.8 fi
322     done
323     done
324 azarah 1.30
325     # In case we filtered out all optimization flags fallback to -O2
326     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327     NEW_CFLAGS="${NEW_CFLAGS} -O2"
328     fi
329     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331     fi
332 azarah 1.8
333 agriffis 1.58 set +f # re-enable pathname expansion
334 azarah 1.8
335     export CFLAGS="${NEW_CFLAGS}"
336     export CXXFLAGS="${NEW_CXXFLAGS}"
337 vapier 1.36 return 0
338 puggy 1.29 }
339    
340 azarah 1.96 test-flag-PROG() {
341     local comp=$1
342     local flags="$2"
343    
344     [[ -z ${comp} || -z ${flags} ]] && \
345     return 1
346    
347     local PROG=$(tc-get${comp})
348     ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349     > /dev/null 2>&1
350     }
351    
352     # Returns true if C compiler support given flag
353     test-flag-CC() { test-flag-PROG "CC" "$1"; }
354    
355     # Returns true if C++ compiler support given flag
356     test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
357    
358 azarah 1.99 test-flags-PROG() {
359     local comp=$1
360     local flags
361 azarah 1.96 local x
362 azarah 1.99
363     shift
364    
365 vapier 1.113 [[ -z ${comp} ]] && return 1
366 swegener 1.101
367 vapier 1.113 x=""
368 azarah 1.96 for x in "$@" ; do
369 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
370 azarah 1.96 done
371    
372 azarah 1.99 echo "${flags}"
373 azarah 1.96
374 azarah 1.99 # Just bail if we dont have any flags
375     [[ -n ${flags} ]]
376 azarah 1.96 }
377    
378 azarah 1.99 # Returns (echo's) the given flags supported by the C compiler
379     test-flags-CC() { test-flags-PROG "CC" "$@"; }
380    
381     # Returns (echo's) the given flags supported by the C++ compiler
382     test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383    
384     # Short-hand that should hopefully work for both C and C++ compiler, but
385 azarah 1.100 # its really only present due to the append-flags() abomination.
386 azarah 1.99 test-flags() { test-flags-CC "$@"; }
387    
388 kevquinn 1.105 # Depriciated, use test-flags()
389 vapier 1.36 test_flag() {
390 kevquinn 1.104 ewarn "test_flag: deprecated, please use test-flags()!" >&2
391 azarah 1.96
392 azarah 1.99 test-flags-CC "$@"
393 puggy 1.29 }
394    
395 agriffis 1.58 test_version_info() {
396 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 agriffis 1.58 return 0
398     else
399     return 1
400     fi
401     }
402    
403 puggy 1.29 strip-unsupported-flags() {
404 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
405     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
406 azarah 1.8 }
407    
408 vapier 1.10 get-flag() {
409 agriffis 1.58 local f findflag="$1"
410    
411 vapier 1.36 # this code looks a little flaky but seems to work for
412     # everything we want ...
413     # for example, if CFLAGS="-march=i686":
414 agriffis 1.58 # `get-flag -march` == "-march=i686"
415     # `get-flag march` == "i686"
416 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
417     if [ "${f/${findflag}}" != "${f}" ] ; then
418 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
419 vapier 1.28 return 0
420 vapier 1.10 fi
421     done
422 vapier 1.28 return 1
423 joker 1.16 }
424    
425 kevquinn 1.92 # DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
426 solar 1.53 has_hardened() {
427 kevquinn 1.104 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
428 swegener 1.101
429 lv 1.69 test_version_info Hardened && return 0
430 azarah 1.96 # The specs file wont exist unless gcc has GCC_SPECS support
431     [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
432 solar 1.53 }
433    
434 kevquinn 1.92 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
435 solar 1.81 # indicate whether PIC is set
436 tseng 1.42 has_pic() {
437 kevquinn 1.104 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
438 swegener 1.101
439 azarah 1.96 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
440 kevquinn 1.105 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
441     gcc-specs-pie
442 tseng 1.42 }
443    
444 kevquinn 1.92 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
445 solar 1.81 # indicate whether PIE is set
446 mr_bones_ 1.83 has_pie() {
447 kevquinn 1.104 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
448 swegener 1.101
449 azarah 1.96 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
450 kevquinn 1.105 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
451     gcc-specs-pie
452 tseng 1.42 }
453 mr_bones_ 1.83
454 kevquinn 1.92 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
455 solar 1.86 # indicate whether code for SSP is being generated for all functions
456     has_ssp_all() {
457 kevquinn 1.104 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
458 swegener 1.101
459 solar 1.86 # note; this matches only -fstack-protector-all
460 azarah 1.96 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
461     -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
462 kevquinn 1.105 gcc-specs-ssp-all
463 solar 1.86 }
464    
465 kevquinn 1.92 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466 solar 1.81 # indicate whether code for SSP is being generated
467 tseng 1.42 has_ssp() {
468 kevquinn 1.104 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
469 swegener 1.101
470 solar 1.81 # note; this matches both -fstack-protector and -fstack-protector-all
471 azarah 1.96 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
472     -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
473     gcc-specs-ssp
474 tseng 1.42 }
475    
476 lv 1.56 has_m64() {
477 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
478     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
479     # please dont replace this function with test_flag in some future
480     # clean-up!
481 swegener 1.101
482 vapier 1.72 local temp="$(emktemp)"
483 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
484 kugelfang 1.74 MY_CC=$(tc-getCC)
485 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
486 vapier 1.72 local ret=$?
487 azarah 1.96 rm -f "${temp}".c
488     [[ ${ret} != 1 ]] && return 0
489 lv 1.62 return 1
490 lv 1.56 }
491    
492     has_m32() {
493 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
494     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
495     # please dont replace this function with test_flag in some future
496     # clean-up!
497 eradicator 1.80
498     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
499    
500 vapier 1.95 local temp=$(emktemp)
501     echo "int main() { return(0); }" > "${temp}".c
502 kugelfang 1.74 MY_CC=$(tc-getCC)
503 vapier 1.95 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
504 vapier 1.72 local ret=$?
505 vapier 1.95 rm -f "${temp}".c
506 azarah 1.96 [[ ${ret} != 1 ]] && return 0
507 lv 1.62 return 1
508 lv 1.56 }
509    
510 vapier 1.18 replace-sparc64-flags() {
511 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
512 joker 1.16
513 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
514 agriffis 1.58 for x in ${SPARC64_CPUS}; do
515 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
516     done
517 mr_bones_ 1.83 else
518 swegener 1.111 for x in ${SPARC64_CPUS}; do
519 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
520     done
521     fi
522 mr_bones_ 1.83
523     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
524 agriffis 1.58 for x in ${SPARC64_CPUS}; do
525 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
526     done
527     else
528 swegener 1.111 for x in ${SPARC64_CPUS}; do
529 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
530     done
531     fi
532 vapier 1.59
533     export CFLAGS CXXFLAGS
534 solar 1.27 }
535    
536     append-ldflags() {
537 kevquinn 1.105 [[ -z $* ]] && return 0
538 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
539 vapier 1.28 return 0
540 solar 1.27 }
541    
542 kevquinn 1.105 # Remove flags from LDFLAGS - it's up to the ebuild to filter
543     # CFLAGS and CXXFLAGS via filter-flags if they need to.
544 solar 1.41 filter-ldflags() {
545 kevquinn 1.105 _filter-var LDFLAGS "$@"
546 solar 1.41 return 0
547     }
548    
549 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
550     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
551     # to gcc where it needs the '-Wl,'.
552 vapier 1.102 raw-ldflags() {
553     local x input="$@"
554     [[ -z ${input} ]] && input=${LDFLAGS}
555     set --
556     for x in ${input} ; do
557 vapier 1.103 x=${x#-Wl,}
558     set -- "$@" ${x//,/ }
559 vapier 1.102 done
560     echo "$@"
561     }
562    
563 flameeyes 1.94 # Gets the flags needed for "NOW" binding
564     bindnow-flags() {
565     case $($(tc-getLD) -v 2>&1 </dev/null) in
566     *GNU* | *'with BFD'*) # GNU ld
567     echo "-Wl,-z,now" ;;
568     *Apple*) # Darwin ld
569     echo "-bind_at_load" ;;
570     *)
571     # Some linkers just recognize -V instead of -v
572     case $($(tc-getLD) -V 2>&1 </dev/null) in
573     *Solaris*) # Solaris accept almost the same GNU options
574     echo "-Wl,-z,now" ;;
575     esac
576     ;;
577     esac
578     }
579 vapier 1.113
580    
581     # Some tests for when we screw with things and want to make
582     # sure we didn't break anything
583     #TESTS() {
584     # CFLAGS="-a -b -c=1"
585     # CXXFLAGS="-x -y -z=2"
586     # LDFLAGS="-l -m -n=3"
587     #
588     # die() { exit 1; }
589     # (is-flag 1 2 3) && die
590     # (is-ldflag 1 2 3) && die
591     #
592     # is-flagq -l && die
593     # is-ldflagq -a && die
594     # is-flagq -a || die
595     # is-flagq -x || die
596     # is-ldflagq -n=* || die
597     # is-ldflagq -n && die
598     #
599     # strip-unsupported-flags
600     # [[ ${CFLAGS} == "-c=1" ]] || die
601     # [[ ${CXXFLAGS} == "-y -z=2" ]] || die
602     #
603     # echo "All tests pass"
604     #}
605     #TESTS

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