/[gentoo-x86]/eclass/flag-o-matic.eclass
Gentoo

Contents of /eclass/flag-o-matic.eclass

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.170 - (hide annotations) (download)
Sat May 26 02:55:02 2012 UTC (2 years, 2 months ago) by vapier
Branch: MAIN
Changes since 1.169: +5 -1 lines
warn when people add preprocessor/linker flags with `append-flags`

1 dirtyepic 1.157 # Copyright 1999-2011 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.170 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.169 2012/02/26 12:09:44 blueness 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 vapier 1.121 # @FUNCTION: append-cppflags
127     # @USAGE: <flags>
128     # @DESCRIPTION:
129     # Add extra <flags> to the current CPPFLAGS.
130 vapier 1.118 append-cppflags() {
131 vapier 1.158 [[ $# -eq 0 ]] && return 0
132 vapier 1.118 export CPPFLAGS="${CPPFLAGS} $*"
133     return 0
134     }
135    
136 vapier 1.136 # @FUNCTION: append-cflags
137     # @USAGE: <flags>
138     # @DESCRIPTION:
139     # Add extra <flags> to the current CFLAGS.
140 mr_bones_ 1.137 append-cflags() {
141 vapier 1.158 [[ $# -eq 0 ]] && return 0
142     export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
143 vapier 1.136 return 0
144     }
145    
146 gengor 1.132 # @FUNCTION: append-cxxflags
147     # @USAGE: <flags>
148     # @DESCRIPTION:
149     # Add extra <flags> to the current CXXFLAGS.
150     append-cxxflags() {
151 vapier 1.158 [[ $# -eq 0 ]] && return 0
152     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
153 gengor 1.132 return 0
154     }
155    
156 dberkholz 1.124 # @FUNCTION: append-fflags
157     # @USAGE: <flags>
158     # @DESCRIPTION:
159     # Add extra <flags> to the current {F,FC}FLAGS.
160     append-fflags() {
161 vapier 1.158 [[ $# -eq 0 ]] && return 0
162     export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
163     export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
164 dberkholz 1.124 return 0
165     }
166    
167 vapier 1.121 # @FUNCTION: append-lfs-flags
168     # @DESCRIPTION:
169     # Add flags that enable Large File Support.
170 vapier 1.48 append-lfs-flags() {
171 vapier 1.154 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
172 vapier 1.155 # see comments in filter-lfs-flags func for meaning of these
173 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
174 vapier 1.48 }
175    
176 vapier 1.121 # @FUNCTION: append-flags
177     # @USAGE: <flags>
178     # @DESCRIPTION:
179 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
180 vapier 1.18 append-flags() {
181 vapier 1.158 [[ $# -eq 0 ]] && return 0
182 vapier 1.170 case " $* " in
183     *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
184     *' '-L*) eqawarn 'please use append-ldflags for linker flags' ;;
185     esac
186 vapier 1.136 append-cflags "$@"
187 vapier 1.138 append-cxxflags "$@"
188 vapier 1.136 append-fflags "$@"
189 vapier 1.28 return 0
190 verwilst 1.1 }
191    
192 vapier 1.121 # @FUNCTION: replace-flags
193     # @USAGE: <old> <new>
194     # @DESCRIPTION:
195     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
196 vapier 1.18 replace-flags() {
197 vapier 1.167 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
198 vapier 1.93
199 vapier 1.167 local f var new
200     for var in $(all-flag-vars) ; do
201 agriffis 1.64 # Looping over the flags instead of using a global
202     # substitution ensures that we're working with flag atoms.
203     # Otherwise globs like -O* have the potential to wipe out the
204     # list of flags.
205 vapier 1.167 new=()
206     for f in ${!var} ; do
207 agriffis 1.64 # Note this should work with globs like -O*
208     [[ ${f} == ${1} ]] && f=${2}
209 vapier 1.167 new+=( "${f}" )
210 agriffis 1.64 done
211 vapier 1.167 eval export ${var}=\""${new[*]}"\"
212 agriffis 1.64 done
213    
214 vapier 1.28 return 0
215 danarmak 1.7 }
216    
217 vapier 1.121 # @FUNCTION: replace-cpu-flags
218     # @USAGE: <old> <new>
219     # @DESCRIPTION:
220     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
221     # with flags that select the <new> cpu. Accepts shell globs for <old>.
222 vapier 1.37 replace-cpu-flags() {
223 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
224     while [ $# -gt 1 ] ; do
225 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
226 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
227 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
228     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
229     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
230     shift
231 vapier 1.37 done
232     return 0
233     }
234    
235 vapier 1.113 _is_flagq() {
236 kevquinn 1.105 local x
237 vapier 1.113 for x in ${!1} ; do
238     [[ ${x} == $2 ]] && return 0
239 kevquinn 1.105 done
240     return 1
241     }
242    
243 vapier 1.121 # @FUNCTION: is-flagq
244     # @USAGE: <flag>
245     # @DESCRIPTION:
246 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
247 vapier 1.113 is-flagq() {
248     [[ -n $2 ]] && die "Usage: is-flag <flag>"
249 vapier 1.167
250     local var
251     for var in $(all-flag-vars) ; do
252     _is_flagq ${var} "$1" && return 0
253     done
254     return 1
255 vapier 1.113 }
256    
257 vapier 1.121 # @FUNCTION: is-flag
258     # @USAGE: <flag>
259     # @DESCRIPTION:
260 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
261 danarmak 1.7 is-flag() {
262 vapier 1.113 is-flagq "$@" && echo true
263 kevquinn 1.105 }
264    
265 vapier 1.121 # @FUNCTION: is-ldflagq
266     # @USAGE: <flag>
267     # @DESCRIPTION:
268     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
269 kevquinn 1.105 is-ldflagq() {
270 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
271     _is_flagq LDFLAGS $1
272 verwilst 1.1 }
273 azarah 1.8
274 vapier 1.121 # @FUNCTION: is-ldflag
275     # @USAGE: <flag>
276     # @DESCRIPTION:
277     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
278 kevquinn 1.105 is-ldflag() {
279 vapier 1.113 is-ldflagq "$@" && echo true
280 kevquinn 1.105 }
281    
282 vapier 1.121 # @FUNCTION: filter-mfpmath
283     # @USAGE: <math types>
284     # @DESCRIPTION:
285     # Remove specified math types from the fpmath flag. For example, if the user
286     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
287     # -mfpmath=386.
288 vapier 1.36 filter-mfpmath() {
289 agriffis 1.58 local orig_mfpmath new_math prune_math
290    
291 vapier 1.36 # save the original -mfpmath flag
292 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
293 vapier 1.36 # get the value of the current -mfpmath flag
294 vapier 1.109 new_math=$(get-flag mfpmath)
295     new_math=" ${new_math//,/ } "
296 vapier 1.36 # figure out which math values are to be removed
297 agriffis 1.58 prune_math=""
298 vapier 1.36 for prune_math in "$@" ; do
299 vapier 1.109 new_math=${new_math/ ${prune_math} / }
300 vapier 1.36 done
301 vapier 1.109 new_math=$(echo ${new_math})
302     new_math=${new_math// /,}
303 vapier 1.36
304 vapier 1.109 if [[ -z ${new_math} ]] ; then
305 vapier 1.36 # if we're removing all user specified math values are
306     # slated for removal, then we just filter the flag
307     filter-flags ${orig_mfpmath}
308     else
309     # if we only want to filter some of the user specified
310     # math values, then we replace the current flag
311     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
312     fi
313     return 0
314     }
315    
316 vapier 1.121 # @FUNCTION: strip-flags
317     # @DESCRIPTION:
318     # Strip C[XX]FLAGS of everything except known good/safe flags.
319 azarah 1.8 strip-flags() {
320 vapier 1.167 local x y var
321 agriffis 1.58
322 vapier 1.36 setup-allowed-flags
323    
324 agriffis 1.58 set -f # disable pathname expansion
325 azarah 1.8
326 vapier 1.167 for var in $(all-flag-vars) ; do
327     local new=()
328 azarah 1.8
329 vapier 1.167 for x in ${!var} ; do
330     local flag=${x%%=*}
331     for y in ${ALLOWED_FLAGS} ; do
332     if [[ -z ${flag%%${y}} ]] ; then
333     new+=( "${x}" )
334     break
335     fi
336     done
337 azarah 1.8 done
338 azarah 1.30
339 vapier 1.167 # In case we filtered out all optimization flags fallback to -O2
340     if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
341     new+=( -O2 )
342     fi
343 dberkholz 1.124
344 vapier 1.167 eval export ${var}=\""${new[*]}"\"
345 dberkholz 1.124 done
346    
347 agriffis 1.58 set +f # re-enable pathname expansion
348 azarah 1.8
349 vapier 1.36 return 0
350 puggy 1.29 }
351    
352 azarah 1.96 test-flag-PROG() {
353     local comp=$1
354 vapier 1.168 local flag=$2
355 azarah 1.96
356 vapier 1.168 [[ -z ${comp} || -z ${flag} ]] && return 1
357 azarah 1.96
358 vapier 1.152 # use -c so we can test the assembler as well
359 azarah 1.96 local PROG=$(tc-get${comp})
360 vapier 1.168 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
361 azarah 1.96 > /dev/null 2>&1
362     }
363    
364 vapier 1.121 # @FUNCTION: test-flag-CC
365     # @USAGE: <flag>
366     # @DESCRIPTION:
367     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
368 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
369    
370 vapier 1.121 # @FUNCTION: test-flag-CXX
371     # @USAGE: <flag>
372     # @DESCRIPTION:
373     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
374 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
375    
376 dberkholz 1.124 # @FUNCTION: test-flag-F77
377     # @USAGE: <flag>
378     # @DESCRIPTION:
379     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
380     test-flag-F77() { test-flag-PROG "F77" "$1"; }
381    
382     # @FUNCTION: test-flag-FC
383     # @USAGE: <flag>
384     # @DESCRIPTION:
385     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
386     test-flag-FC() { test-flag-PROG "FC" "$1"; }
387    
388 azarah 1.99 test-flags-PROG() {
389     local comp=$1
390     local flags
391 azarah 1.96 local x
392 azarah 1.99
393     shift
394    
395 vapier 1.113 [[ -z ${comp} ]] && return 1
396 swegener 1.101
397 azarah 1.96 for x in "$@" ; do
398 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
399 azarah 1.96 done
400    
401 azarah 1.99 echo "${flags}"
402 azarah 1.96
403 azarah 1.99 # Just bail if we dont have any flags
404     [[ -n ${flags} ]]
405 azarah 1.96 }
406    
407 vapier 1.121 # @FUNCTION: test-flags-CC
408     # @USAGE: <flags>
409     # @DESCRIPTION:
410     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
411 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
412    
413 vapier 1.121 # @FUNCTION: test-flags-CXX
414     # @USAGE: <flags>
415     # @DESCRIPTION:
416     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
417 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
418    
419 dberkholz 1.124 # @FUNCTION: test-flags-F77
420     # @USAGE: <flags>
421     # @DESCRIPTION:
422     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
423     test-flags-F77() { test-flags-PROG "F77" "$@"; }
424    
425     # @FUNCTION: test-flags-FC
426     # @USAGE: <flags>
427     # @DESCRIPTION:
428     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
429     test-flags-FC() { test-flags-PROG "FC" "$@"; }
430    
431 vapier 1.121 # @FUNCTION: test-flags
432     # @USAGE: <flags>
433     # @DESCRIPTION:
434 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
435 azarah 1.100 # its really only present due to the append-flags() abomination.
436 azarah 1.99 test-flags() { test-flags-CC "$@"; }
437    
438 vapier 1.121 # @FUNCTION: test_version_info
439     # @USAGE: <version>
440     # @DESCRIPTION:
441     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
442     # Accepts shell globs.
443 agriffis 1.58 test_version_info() {
444 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
445 agriffis 1.58 return 0
446     else
447     return 1
448     fi
449     }
450    
451 vapier 1.121 # @FUNCTION: strip-unsupported-flags
452     # @DESCRIPTION:
453 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
454 puggy 1.29 strip-unsupported-flags() {
455 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
456     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
457 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
458     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
459 azarah 1.8 }
460    
461 vapier 1.121 # @FUNCTION: get-flag
462     # @USAGE: <flag>
463     # @DESCRIPTION:
464     # Find and echo the value for a particular flag. Accepts shell globs.
465 vapier 1.10 get-flag() {
466 vapier 1.167 local f var findflag="$1"
467 agriffis 1.58
468 vapier 1.36 # this code looks a little flaky but seems to work for
469     # everything we want ...
470     # for example, if CFLAGS="-march=i686":
471 agriffis 1.58 # `get-flag -march` == "-march=i686"
472     # `get-flag march` == "i686"
473 vapier 1.167 for var in $(all-flag-vars) ; do
474     for f in ${!var} ; do
475     if [ "${f/${findflag}}" != "${f}" ] ; then
476     printf "%s\n" "${f/-${findflag}=}"
477     return 0
478     fi
479     done
480 vapier 1.10 done
481 vapier 1.28 return 1
482 joker 1.16 }
483    
484 vapier 1.121 # @FUNCTION: has_m64
485     # @DESCRIPTION:
486     # This doesn't test if the flag is accepted, it tests if the flag actually
487     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
488     # return code is 0, else the return code is 1.
489 lv 1.56 has_m64() {
490 vapier 1.166 eqawarn "${FUNCNAME}: don't use this anymore"
491    
492 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
493     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
494     # please dont replace this function with test_flag in some future
495     # clean-up!
496 swegener 1.101
497 vapier 1.72 local temp="$(emktemp)"
498 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
499 kugelfang 1.74 MY_CC=$(tc-getCC)
500 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
501 vapier 1.72 local ret=$?
502 azarah 1.96 rm -f "${temp}".c
503     [[ ${ret} != 1 ]] && return 0
504 lv 1.62 return 1
505 lv 1.56 }
506    
507     has_m32() {
508 vapier 1.166 die "${FUNCNAME}: don't use this anymore"
509 lv 1.56 }
510    
511 vapier 1.121 # @FUNCTION: replace-sparc64-flags
512     # @DESCRIPTION:
513     # Sets mcpu to v8 and uses the original value as mtune if none specified.
514 vapier 1.18 replace-sparc64-flags() {
515 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
516 joker 1.16
517 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
518 agriffis 1.58 for x in ${SPARC64_CPUS}; do
519 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
520     done
521 mr_bones_ 1.83 else
522 swegener 1.111 for x in ${SPARC64_CPUS}; do
523 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
524     done
525     fi
526 mr_bones_ 1.83
527     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
528 agriffis 1.58 for x in ${SPARC64_CPUS}; do
529 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
530     done
531     else
532 swegener 1.111 for x in ${SPARC64_CPUS}; do
533 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
534     done
535     fi
536 vapier 1.59
537     export CFLAGS CXXFLAGS
538 solar 1.27 }
539    
540 abcd 1.147 # @FUNCTION: append-libs
541     # @USAGE: <libs>
542     # @DESCRIPTION:
543     # Add extra <libs> to the current LIBS.
544     append-libs() {
545 vapier 1.158 [[ $# -eq 0 ]] && return 0
546 abcd 1.147 local flag
547     for flag in "$@"; do
548     [[ ${flag} == -l* ]] && flag=${flag#-l}
549     export LIBS="${LIBS} -l${flag}"
550     done
551    
552     return 0
553     }
554    
555 vapier 1.121 # @FUNCTION: append-ldflags
556     # @USAGE: <flags>
557     # @DESCRIPTION:
558     # Add extra <flags> to the current LDFLAGS.
559 solar 1.27 append-ldflags() {
560 vapier 1.158 [[ $# -eq 0 ]] && return 0
561 flameeyes 1.123 local flag
562     for flag in "$@"; do
563     [[ ${flag} == -l* ]] && \
564     ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
565     done
566    
567 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
568 vapier 1.28 return 0
569 solar 1.27 }
570    
571 vapier 1.121 # @FUNCTION: filter-ldflags
572     # @USAGE: <flags>
573     # @DESCRIPTION:
574     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
575 solar 1.41 filter-ldflags() {
576 kevquinn 1.105 _filter-var LDFLAGS "$@"
577 solar 1.41 return 0
578     }
579    
580 vapier 1.121 # @FUNCTION: raw-ldflags
581 vapier 1.156 # @USAGE: [flags]
582 vapier 1.121 # @DESCRIPTION:
583 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
584     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
585     # to gcc where it needs the '-Wl,'.
586 vapier 1.156 #
587     # If no flags are specified, then default to ${LDFLAGS}.
588 vapier 1.102 raw-ldflags() {
589     local x input="$@"
590     [[ -z ${input} ]] && input=${LDFLAGS}
591     set --
592     for x in ${input} ; do
593 vapier 1.103 x=${x#-Wl,}
594     set -- "$@" ${x//,/ }
595 vapier 1.102 done
596     echo "$@"
597     }
598    
599 ssuominen 1.145 # @FUNCTION: no-as-needed
600     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
601     no-as-needed() {
602     case $($(tc-getLD) -v 2>&1 </dev/null) in
603     *GNU*) # GNU ld
604     echo "-Wl,--no-as-needed" ;;
605     esac
606     }
607 vapier 1.113
608 vapier 1.160 fi

  ViewVC Help
Powered by ViewVC 1.1.20