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Revision 1.172 - (hide annotations) (download)
Thu May 31 00:24:47 2012 UTC (2 years, 4 months ago) by vapier
Branch: MAIN
Changes since 1.171: +3 -2 lines
also warn on -Wl, flags passed to append-flags

1 jlec 1.171 # Copyright 1999-2012 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.172 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.171 2012/05/30 07:59:51 jlec Exp $
4 vapier 1.121
5     # @ECLASS: flag-o-matic.eclass
6     # @MAINTAINER:
7     # toolchain@gentoo.org
8     # @BLURB: common functions to manipulate and query toolchain flags
9     # @DESCRIPTION:
10     # This eclass contains a suite of functions to help developers sanely
11     # and safely manage toolchain flags in their builds.
12 vapier 1.63
13 vapier 1.160 if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14     ___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15    
16 eradicator 1.80 inherit eutils toolchain-funcs multilib
17 vapier 1.72
18 vapier 1.167 # Return all the flag variables that our high level funcs operate on.
19     all-flag-vars() {
20 blueness 1.169 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
21 vapier 1.167 }
22    
23 dberkholz 1.124 # {C,CXX,F,FC}FLAGS that we allow in strip-flags
24 vapier 1.117 # Note: shell globs and character lists are allowed
25 vapier 1.36 setup-allowed-flags() {
26 dirtyepic 1.163 ALLOWED_FLAGS="-pipe"
27     ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
28     ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
29     ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
30     ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
31     ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
32     ALLOWED_FLAGS+=" -fno-ident -fpermissive"
33     ALLOWED_FLAGS+=" -W* -w"
34    
35 vapier 1.65 # allow a bunch of flags that negate features / control ABI
36 dirtyepic 1.163 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
37     -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38     -fno-omit-frame-pointer"
39     ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
40     -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41     -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
42     -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
43 vapier 1.87 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
44 dirtyepic 1.149 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
45 dirtyepic 1.163 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
46     -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
47     -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
48     -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
49 vapier 1.135
50 dirtyepic 1.148 # 4.5
51 dirtyepic 1.163 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
52 dirtyepic 1.149 # 4.6
53 dirtyepic 1.163 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
54 dirtyepic 1.148
55 dirtyepic 1.163 export ALLOWED_FLAGS
56 vapier 1.36 return 0
57 aliz 1.24 }
58 verwilst 1.13
59 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
60     # the hardened compiler defaults.
61     _filter-hardened() {
62     local f
63     for f in "$@" ; do
64     case "${f}" in
65     # Ideally we should only concern ourselves with PIE flags,
66     # not -fPIC or -fpic, but too many places filter -fPIC without
67     # thinking about -fPIE.
68     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
69     gcc-specs-pie || continue
70     is-flagq -nopie || append-flags -nopie;;
71     -fstack-protector)
72     gcc-specs-ssp || continue
73 gengor 1.131 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
74 kevquinn 1.105 -fstack-protector-all)
75     gcc-specs-ssp-to-all || continue
76 gengor 1.131 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
77 gengor 1.128 -fno-strict-overflow)
78     gcc-specs-nostrict || continue
79 gengor 1.131 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
80 solar 1.27 esac
81     done
82 kevquinn 1.105 }
83    
84     # Remove occurrences of strings from variable given in $1
85     # Strings removed are matched as globs, so for example
86     # '-O*' would remove -O1, -O2 etc.
87     _filter-var() {
88 vapier 1.167 local f x var=$1 new=()
89     shift
90 vapier 1.36
91 vapier 1.167 for f in ${!var} ; do
92     for x in "$@" ; do
93 kevquinn 1.105 # Note this should work with globs like -O*
94     [[ ${f} == ${x} ]] && continue 2
95 agriffis 1.61 done
96 vapier 1.167 new+=( "${f}" )
97 verwilst 1.1 done
98 vapier 1.167 eval export ${var}=\""${new[*]}"\"
99 kevquinn 1.105 }
100 agriffis 1.61
101 vapier 1.121 # @FUNCTION: filter-flags
102     # @USAGE: <flags>
103     # @DESCRIPTION:
104 blueness 1.169 # Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
105 kevquinn 1.105 filter-flags() {
106     _filter-hardened "$@"
107 vapier 1.164 local v
108 vapier 1.167 for v in $(all-flag-vars) ; do
109     _filter-var ${v} "$@"
110 vapier 1.164 done
111 vapier 1.36 return 0
112 verwilst 1.2 }
113    
114 vapier 1.121 # @FUNCTION: filter-lfs-flags
115     # @DESCRIPTION:
116     # Remove flags that enable Large File Support.
117 vapier 1.40 filter-lfs-flags() {
118 vapier 1.154 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 vapier 1.153 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120     # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121     # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122     # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
123 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124     }
125    
126 jlec 1.171 # @FUNCTION: filter-ldflags
127     # @USAGE: <flags>
128     # @DESCRIPTION:
129     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
130     filter-ldflags() {
131     _filter-var LDFLAGS "$@"
132     return 0
133     }
134    
135 vapier 1.121 # @FUNCTION: append-cppflags
136     # @USAGE: <flags>
137     # @DESCRIPTION:
138     # Add extra <flags> to the current CPPFLAGS.
139 vapier 1.118 append-cppflags() {
140 vapier 1.158 [[ $# -eq 0 ]] && return 0
141 vapier 1.118 export CPPFLAGS="${CPPFLAGS} $*"
142     return 0
143     }
144    
145 vapier 1.136 # @FUNCTION: append-cflags
146     # @USAGE: <flags>
147     # @DESCRIPTION:
148     # Add extra <flags> to the current CFLAGS.
149 mr_bones_ 1.137 append-cflags() {
150 vapier 1.158 [[ $# -eq 0 ]] && return 0
151     export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
152 vapier 1.136 return 0
153     }
154    
155 gengor 1.132 # @FUNCTION: append-cxxflags
156     # @USAGE: <flags>
157     # @DESCRIPTION:
158     # Add extra <flags> to the current CXXFLAGS.
159     append-cxxflags() {
160 vapier 1.158 [[ $# -eq 0 ]] && return 0
161     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
162 gengor 1.132 return 0
163     }
164    
165 dberkholz 1.124 # @FUNCTION: append-fflags
166     # @USAGE: <flags>
167     # @DESCRIPTION:
168     # Add extra <flags> to the current {F,FC}FLAGS.
169     append-fflags() {
170 vapier 1.158 [[ $# -eq 0 ]] && return 0
171     export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
172     export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
173 dberkholz 1.124 return 0
174     }
175    
176 vapier 1.121 # @FUNCTION: append-lfs-flags
177     # @DESCRIPTION:
178     # Add flags that enable Large File Support.
179 vapier 1.48 append-lfs-flags() {
180 vapier 1.154 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
181 vapier 1.155 # see comments in filter-lfs-flags func for meaning of these
182 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
183 vapier 1.48 }
184    
185 jlec 1.171 # @FUNCTION: append-ldflags
186     # @USAGE: <flags>
187     # @DESCRIPTION:
188     # Add extra <flags> to the current LDFLAGS.
189     append-ldflags() {
190     [[ $# -eq 0 ]] && return 0
191     local flag
192     for flag in "$@"; do
193     [[ ${flag} == -l* ]] && \
194     ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
195     done
196    
197     export LDFLAGS="${LDFLAGS} $*"
198     return 0
199     }
200    
201 vapier 1.121 # @FUNCTION: append-flags
202     # @USAGE: <flags>
203     # @DESCRIPTION:
204 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
205 vapier 1.18 append-flags() {
206 vapier 1.158 [[ $# -eq 0 ]] && return 0
207 vapier 1.170 case " $* " in
208     *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
209 vapier 1.172 *' '-L*|\
210     *' '-Wl,*') eqawarn 'please use append-ldflags for linker flags' ;;
211 vapier 1.170 esac
212 vapier 1.136 append-cflags "$@"
213 vapier 1.138 append-cxxflags "$@"
214 vapier 1.136 append-fflags "$@"
215 vapier 1.28 return 0
216 verwilst 1.1 }
217    
218 vapier 1.121 # @FUNCTION: replace-flags
219     # @USAGE: <old> <new>
220     # @DESCRIPTION:
221     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
222 vapier 1.18 replace-flags() {
223 vapier 1.167 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
224 vapier 1.93
225 vapier 1.167 local f var new
226     for var in $(all-flag-vars) ; do
227 agriffis 1.64 # Looping over the flags instead of using a global
228     # substitution ensures that we're working with flag atoms.
229     # Otherwise globs like -O* have the potential to wipe out the
230     # list of flags.
231 vapier 1.167 new=()
232     for f in ${!var} ; do
233 agriffis 1.64 # Note this should work with globs like -O*
234     [[ ${f} == ${1} ]] && f=${2}
235 vapier 1.167 new+=( "${f}" )
236 agriffis 1.64 done
237 vapier 1.167 eval export ${var}=\""${new[*]}"\"
238 agriffis 1.64 done
239    
240 vapier 1.28 return 0
241 danarmak 1.7 }
242    
243 vapier 1.121 # @FUNCTION: replace-cpu-flags
244     # @USAGE: <old> <new>
245     # @DESCRIPTION:
246     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
247     # with flags that select the <new> cpu. Accepts shell globs for <old>.
248 vapier 1.37 replace-cpu-flags() {
249 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
250     while [ $# -gt 1 ] ; do
251 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
252 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
253 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
254     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
255     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
256     shift
257 vapier 1.37 done
258     return 0
259     }
260    
261 vapier 1.113 _is_flagq() {
262 kevquinn 1.105 local x
263 vapier 1.113 for x in ${!1} ; do
264     [[ ${x} == $2 ]] && return 0
265 kevquinn 1.105 done
266     return 1
267     }
268    
269 vapier 1.121 # @FUNCTION: is-flagq
270     # @USAGE: <flag>
271     # @DESCRIPTION:
272 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
273 vapier 1.113 is-flagq() {
274     [[ -n $2 ]] && die "Usage: is-flag <flag>"
275 vapier 1.167
276     local var
277     for var in $(all-flag-vars) ; do
278     _is_flagq ${var} "$1" && return 0
279     done
280     return 1
281 vapier 1.113 }
282    
283 vapier 1.121 # @FUNCTION: is-flag
284     # @USAGE: <flag>
285     # @DESCRIPTION:
286 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
287 danarmak 1.7 is-flag() {
288 vapier 1.113 is-flagq "$@" && echo true
289 kevquinn 1.105 }
290    
291 vapier 1.121 # @FUNCTION: is-ldflagq
292     # @USAGE: <flag>
293     # @DESCRIPTION:
294     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
295 kevquinn 1.105 is-ldflagq() {
296 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
297     _is_flagq LDFLAGS $1
298 verwilst 1.1 }
299 azarah 1.8
300 vapier 1.121 # @FUNCTION: is-ldflag
301     # @USAGE: <flag>
302     # @DESCRIPTION:
303     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
304 kevquinn 1.105 is-ldflag() {
305 vapier 1.113 is-ldflagq "$@" && echo true
306 kevquinn 1.105 }
307    
308 vapier 1.121 # @FUNCTION: filter-mfpmath
309     # @USAGE: <math types>
310     # @DESCRIPTION:
311     # Remove specified math types from the fpmath flag. For example, if the user
312     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
313     # -mfpmath=386.
314 vapier 1.36 filter-mfpmath() {
315 agriffis 1.58 local orig_mfpmath new_math prune_math
316    
317 vapier 1.36 # save the original -mfpmath flag
318 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
319 vapier 1.36 # get the value of the current -mfpmath flag
320 vapier 1.109 new_math=$(get-flag mfpmath)
321     new_math=" ${new_math//,/ } "
322 vapier 1.36 # figure out which math values are to be removed
323 agriffis 1.58 prune_math=""
324 vapier 1.36 for prune_math in "$@" ; do
325 vapier 1.109 new_math=${new_math/ ${prune_math} / }
326 vapier 1.36 done
327 vapier 1.109 new_math=$(echo ${new_math})
328     new_math=${new_math// /,}
329 vapier 1.36
330 vapier 1.109 if [[ -z ${new_math} ]] ; then
331 vapier 1.36 # if we're removing all user specified math values are
332     # slated for removal, then we just filter the flag
333     filter-flags ${orig_mfpmath}
334     else
335     # if we only want to filter some of the user specified
336     # math values, then we replace the current flag
337     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
338     fi
339     return 0
340     }
341    
342 vapier 1.121 # @FUNCTION: strip-flags
343     # @DESCRIPTION:
344     # Strip C[XX]FLAGS of everything except known good/safe flags.
345 azarah 1.8 strip-flags() {
346 vapier 1.167 local x y var
347 agriffis 1.58
348 vapier 1.36 setup-allowed-flags
349    
350 agriffis 1.58 set -f # disable pathname expansion
351 azarah 1.8
352 vapier 1.167 for var in $(all-flag-vars) ; do
353     local new=()
354 azarah 1.8
355 vapier 1.167 for x in ${!var} ; do
356     local flag=${x%%=*}
357     for y in ${ALLOWED_FLAGS} ; do
358     if [[ -z ${flag%%${y}} ]] ; then
359     new+=( "${x}" )
360     break
361     fi
362     done
363 azarah 1.8 done
364 azarah 1.30
365 vapier 1.167 # In case we filtered out all optimization flags fallback to -O2
366     if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
367     new+=( -O2 )
368     fi
369 dberkholz 1.124
370 vapier 1.167 eval export ${var}=\""${new[*]}"\"
371 dberkholz 1.124 done
372    
373 agriffis 1.58 set +f # re-enable pathname expansion
374 azarah 1.8
375 vapier 1.36 return 0
376 puggy 1.29 }
377    
378 azarah 1.96 test-flag-PROG() {
379     local comp=$1
380 vapier 1.168 local flag=$2
381 azarah 1.96
382 vapier 1.168 [[ -z ${comp} || -z ${flag} ]] && return 1
383 azarah 1.96
384 vapier 1.152 # use -c so we can test the assembler as well
385 azarah 1.96 local PROG=$(tc-get${comp})
386 vapier 1.168 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
387 azarah 1.96 > /dev/null 2>&1
388     }
389    
390 vapier 1.121 # @FUNCTION: test-flag-CC
391     # @USAGE: <flag>
392     # @DESCRIPTION:
393     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
394 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
395    
396 vapier 1.121 # @FUNCTION: test-flag-CXX
397     # @USAGE: <flag>
398     # @DESCRIPTION:
399     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
400 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
401    
402 dberkholz 1.124 # @FUNCTION: test-flag-F77
403     # @USAGE: <flag>
404     # @DESCRIPTION:
405     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
406     test-flag-F77() { test-flag-PROG "F77" "$1"; }
407    
408     # @FUNCTION: test-flag-FC
409     # @USAGE: <flag>
410     # @DESCRIPTION:
411     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
412     test-flag-FC() { test-flag-PROG "FC" "$1"; }
413    
414 azarah 1.99 test-flags-PROG() {
415     local comp=$1
416     local flags
417 azarah 1.96 local x
418 azarah 1.99
419     shift
420    
421 vapier 1.113 [[ -z ${comp} ]] && return 1
422 swegener 1.101
423 azarah 1.96 for x in "$@" ; do
424 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
425 azarah 1.96 done
426    
427 azarah 1.99 echo "${flags}"
428 azarah 1.96
429 azarah 1.99 # Just bail if we dont have any flags
430     [[ -n ${flags} ]]
431 azarah 1.96 }
432    
433 vapier 1.121 # @FUNCTION: test-flags-CC
434     # @USAGE: <flags>
435     # @DESCRIPTION:
436     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
437 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
438    
439 vapier 1.121 # @FUNCTION: test-flags-CXX
440     # @USAGE: <flags>
441     # @DESCRIPTION:
442     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
443 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
444    
445 dberkholz 1.124 # @FUNCTION: test-flags-F77
446     # @USAGE: <flags>
447     # @DESCRIPTION:
448     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
449     test-flags-F77() { test-flags-PROG "F77" "$@"; }
450    
451     # @FUNCTION: test-flags-FC
452     # @USAGE: <flags>
453     # @DESCRIPTION:
454     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
455     test-flags-FC() { test-flags-PROG "FC" "$@"; }
456    
457 vapier 1.121 # @FUNCTION: test-flags
458     # @USAGE: <flags>
459     # @DESCRIPTION:
460 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
461 azarah 1.100 # its really only present due to the append-flags() abomination.
462 azarah 1.99 test-flags() { test-flags-CC "$@"; }
463    
464 vapier 1.121 # @FUNCTION: test_version_info
465     # @USAGE: <version>
466     # @DESCRIPTION:
467     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
468     # Accepts shell globs.
469 agriffis 1.58 test_version_info() {
470 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
471 agriffis 1.58 return 0
472     else
473     return 1
474     fi
475     }
476    
477 vapier 1.121 # @FUNCTION: strip-unsupported-flags
478     # @DESCRIPTION:
479 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
480 puggy 1.29 strip-unsupported-flags() {
481 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
482     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
483 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
484     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
485 azarah 1.8 }
486    
487 vapier 1.121 # @FUNCTION: get-flag
488     # @USAGE: <flag>
489     # @DESCRIPTION:
490     # Find and echo the value for a particular flag. Accepts shell globs.
491 vapier 1.10 get-flag() {
492 vapier 1.167 local f var findflag="$1"
493 agriffis 1.58
494 vapier 1.36 # this code looks a little flaky but seems to work for
495     # everything we want ...
496     # for example, if CFLAGS="-march=i686":
497 agriffis 1.58 # `get-flag -march` == "-march=i686"
498     # `get-flag march` == "i686"
499 vapier 1.167 for var in $(all-flag-vars) ; do
500     for f in ${!var} ; do
501     if [ "${f/${findflag}}" != "${f}" ] ; then
502     printf "%s\n" "${f/-${findflag}=}"
503     return 0
504     fi
505     done
506 vapier 1.10 done
507 vapier 1.28 return 1
508 joker 1.16 }
509    
510 vapier 1.121 # @FUNCTION: has_m64
511     # @DESCRIPTION:
512     # This doesn't test if the flag is accepted, it tests if the flag actually
513     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
514     # return code is 0, else the return code is 1.
515 lv 1.56 has_m64() {
516 vapier 1.166 eqawarn "${FUNCNAME}: don't use this anymore"
517    
518 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
519     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
520     # please dont replace this function with test_flag in some future
521     # clean-up!
522 swegener 1.101
523 vapier 1.72 local temp="$(emktemp)"
524 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
525 kugelfang 1.74 MY_CC=$(tc-getCC)
526 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
527 vapier 1.72 local ret=$?
528 azarah 1.96 rm -f "${temp}".c
529     [[ ${ret} != 1 ]] && return 0
530 lv 1.62 return 1
531 lv 1.56 }
532    
533     has_m32() {
534 vapier 1.166 die "${FUNCNAME}: don't use this anymore"
535 lv 1.56 }
536    
537 vapier 1.121 # @FUNCTION: replace-sparc64-flags
538     # @DESCRIPTION:
539     # Sets mcpu to v8 and uses the original value as mtune if none specified.
540 vapier 1.18 replace-sparc64-flags() {
541 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
542 joker 1.16
543 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
544 agriffis 1.58 for x in ${SPARC64_CPUS}; do
545 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
546     done
547 mr_bones_ 1.83 else
548 swegener 1.111 for x in ${SPARC64_CPUS}; do
549 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
550     done
551     fi
552 mr_bones_ 1.83
553     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
554 agriffis 1.58 for x in ${SPARC64_CPUS}; do
555 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
556     done
557     else
558 swegener 1.111 for x in ${SPARC64_CPUS}; do
559 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
560     done
561     fi
562 vapier 1.59
563     export CFLAGS CXXFLAGS
564 solar 1.27 }
565    
566 abcd 1.147 # @FUNCTION: append-libs
567     # @USAGE: <libs>
568     # @DESCRIPTION:
569     # Add extra <libs> to the current LIBS.
570     append-libs() {
571 vapier 1.158 [[ $# -eq 0 ]] && return 0
572 abcd 1.147 local flag
573     for flag in "$@"; do
574     [[ ${flag} == -l* ]] && flag=${flag#-l}
575     export LIBS="${LIBS} -l${flag}"
576     done
577    
578     return 0
579     }
580    
581 vapier 1.121 # @FUNCTION: raw-ldflags
582 vapier 1.156 # @USAGE: [flags]
583 vapier 1.121 # @DESCRIPTION:
584 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
585     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
586     # to gcc where it needs the '-Wl,'.
587 vapier 1.156 #
588     # If no flags are specified, then default to ${LDFLAGS}.
589 vapier 1.102 raw-ldflags() {
590     local x input="$@"
591     [[ -z ${input} ]] && input=${LDFLAGS}
592     set --
593     for x in ${input} ; do
594 vapier 1.103 x=${x#-Wl,}
595     set -- "$@" ${x//,/ }
596 vapier 1.102 done
597     echo "$@"
598     }
599    
600 ssuominen 1.145 # @FUNCTION: no-as-needed
601     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
602     no-as-needed() {
603     case $($(tc-getLD) -v 2>&1 </dev/null) in
604     *GNU*) # GNU ld
605     echo "-Wl,--no-as-needed" ;;
606     esac
607     }
608 vapier 1.113
609 vapier 1.160 fi

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