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Revision 1.168 - (hide annotations) (download)
Mon Jan 16 20:03:32 2012 UTC (2 years, 11 months ago) by vapier
Branch: MAIN
Changes since 1.167: +4 -4 lines
quote single flag arg to test-flag-PROG since we are only testing one flag, and we want to handle any weirdness in that flag (such as spaces) #399055

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 1.168 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.167 2012/01/14 09:10:54 vapier 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     echo {C,CPP,CXX,F,FC,LD}FLAGS
21     }
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 vapier 1.164 # Remove particular <flags> from {C,CPP,CXX,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 [[ $# -eq 0 ]] && return 0
182 vapier 1.136 append-cflags "$@"
183 vapier 1.138 append-cxxflags "$@"
184 vapier 1.136 append-fflags "$@"
185 vapier 1.28 return 0
186 verwilst 1.1 }
187    
188 vapier 1.121 # @FUNCTION: replace-flags
189     # @USAGE: <old> <new>
190     # @DESCRIPTION:
191     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
192 vapier 1.18 replace-flags() {
193 vapier 1.167 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
194 vapier 1.93
195 vapier 1.167 local f var new
196     for var in $(all-flag-vars) ; do
197 agriffis 1.64 # Looping over the flags instead of using a global
198     # substitution ensures that we're working with flag atoms.
199     # Otherwise globs like -O* have the potential to wipe out the
200     # list of flags.
201 vapier 1.167 new=()
202     for f in ${!var} ; do
203 agriffis 1.64 # Note this should work with globs like -O*
204     [[ ${f} == ${1} ]] && f=${2}
205 vapier 1.167 new+=( "${f}" )
206 agriffis 1.64 done
207 vapier 1.167 eval export ${var}=\""${new[*]}"\"
208 agriffis 1.64 done
209    
210 vapier 1.28 return 0
211 danarmak 1.7 }
212    
213 vapier 1.121 # @FUNCTION: replace-cpu-flags
214     # @USAGE: <old> <new>
215     # @DESCRIPTION:
216     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
217     # with flags that select the <new> cpu. Accepts shell globs for <old>.
218 vapier 1.37 replace-cpu-flags() {
219 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
220     while [ $# -gt 1 ] ; do
221 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
222 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
223 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
224     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
225     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
226     shift
227 vapier 1.37 done
228     return 0
229     }
230    
231 vapier 1.113 _is_flagq() {
232 kevquinn 1.105 local x
233 vapier 1.113 for x in ${!1} ; do
234     [[ ${x} == $2 ]] && return 0
235 kevquinn 1.105 done
236     return 1
237     }
238    
239 vapier 1.121 # @FUNCTION: is-flagq
240     # @USAGE: <flag>
241     # @DESCRIPTION:
242 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
243 vapier 1.113 is-flagq() {
244     [[ -n $2 ]] && die "Usage: is-flag <flag>"
245 vapier 1.167
246     local var
247     for var in $(all-flag-vars) ; do
248     _is_flagq ${var} "$1" && return 0
249     done
250     return 1
251 vapier 1.113 }
252    
253 vapier 1.121 # @FUNCTION: is-flag
254     # @USAGE: <flag>
255     # @DESCRIPTION:
256 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
257 danarmak 1.7 is-flag() {
258 vapier 1.113 is-flagq "$@" && echo true
259 kevquinn 1.105 }
260    
261 vapier 1.121 # @FUNCTION: is-ldflagq
262     # @USAGE: <flag>
263     # @DESCRIPTION:
264     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
265 kevquinn 1.105 is-ldflagq() {
266 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
267     _is_flagq LDFLAGS $1
268 verwilst 1.1 }
269 azarah 1.8
270 vapier 1.121 # @FUNCTION: is-ldflag
271     # @USAGE: <flag>
272     # @DESCRIPTION:
273     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
274 kevquinn 1.105 is-ldflag() {
275 vapier 1.113 is-ldflagq "$@" && echo true
276 kevquinn 1.105 }
277    
278 vapier 1.121 # @FUNCTION: filter-mfpmath
279     # @USAGE: <math types>
280     # @DESCRIPTION:
281     # Remove specified math types from the fpmath flag. For example, if the user
282     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
283     # -mfpmath=386.
284 vapier 1.36 filter-mfpmath() {
285 agriffis 1.58 local orig_mfpmath new_math prune_math
286    
287 vapier 1.36 # save the original -mfpmath flag
288 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
289 vapier 1.36 # get the value of the current -mfpmath flag
290 vapier 1.109 new_math=$(get-flag mfpmath)
291     new_math=" ${new_math//,/ } "
292 vapier 1.36 # figure out which math values are to be removed
293 agriffis 1.58 prune_math=""
294 vapier 1.36 for prune_math in "$@" ; do
295 vapier 1.109 new_math=${new_math/ ${prune_math} / }
296 vapier 1.36 done
297 vapier 1.109 new_math=$(echo ${new_math})
298     new_math=${new_math// /,}
299 vapier 1.36
300 vapier 1.109 if [[ -z ${new_math} ]] ; then
301 vapier 1.36 # if we're removing all user specified math values are
302     # slated for removal, then we just filter the flag
303     filter-flags ${orig_mfpmath}
304     else
305     # if we only want to filter some of the user specified
306     # math values, then we replace the current flag
307     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
308     fi
309     return 0
310     }
311    
312 vapier 1.121 # @FUNCTION: strip-flags
313     # @DESCRIPTION:
314     # Strip C[XX]FLAGS of everything except known good/safe flags.
315 azarah 1.8 strip-flags() {
316 vapier 1.167 local x y var
317 agriffis 1.58
318 vapier 1.36 setup-allowed-flags
319    
320 agriffis 1.58 set -f # disable pathname expansion
321 azarah 1.8
322 vapier 1.167 for var in $(all-flag-vars) ; do
323     local new=()
324 azarah 1.8
325 vapier 1.167 for x in ${!var} ; do
326     local flag=${x%%=*}
327     for y in ${ALLOWED_FLAGS} ; do
328     if [[ -z ${flag%%${y}} ]] ; then
329     new+=( "${x}" )
330     break
331     fi
332     done
333 azarah 1.8 done
334 azarah 1.30
335 vapier 1.167 # In case we filtered out all optimization flags fallback to -O2
336     if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
337     new+=( -O2 )
338     fi
339 dberkholz 1.124
340 vapier 1.167 eval export ${var}=\""${new[*]}"\"
341 dberkholz 1.124 done
342    
343 agriffis 1.58 set +f # re-enable pathname expansion
344 azarah 1.8
345 vapier 1.36 return 0
346 puggy 1.29 }
347    
348 azarah 1.96 test-flag-PROG() {
349     local comp=$1
350 vapier 1.168 local flag=$2
351 azarah 1.96
352 vapier 1.168 [[ -z ${comp} || -z ${flag} ]] && return 1
353 azarah 1.96
354 vapier 1.152 # use -c so we can test the assembler as well
355 azarah 1.96 local PROG=$(tc-get${comp})
356 vapier 1.168 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
357 azarah 1.96 > /dev/null 2>&1
358     }
359    
360 vapier 1.121 # @FUNCTION: test-flag-CC
361     # @USAGE: <flag>
362     # @DESCRIPTION:
363     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
364 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
365    
366 vapier 1.121 # @FUNCTION: test-flag-CXX
367     # @USAGE: <flag>
368     # @DESCRIPTION:
369     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
370 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
371    
372 dberkholz 1.124 # @FUNCTION: test-flag-F77
373     # @USAGE: <flag>
374     # @DESCRIPTION:
375     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
376     test-flag-F77() { test-flag-PROG "F77" "$1"; }
377    
378     # @FUNCTION: test-flag-FC
379     # @USAGE: <flag>
380     # @DESCRIPTION:
381     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
382     test-flag-FC() { test-flag-PROG "FC" "$1"; }
383    
384 azarah 1.99 test-flags-PROG() {
385     local comp=$1
386     local flags
387 azarah 1.96 local x
388 azarah 1.99
389     shift
390    
391 vapier 1.113 [[ -z ${comp} ]] && return 1
392 swegener 1.101
393 azarah 1.96 for x in "$@" ; do
394 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
395 azarah 1.96 done
396    
397 azarah 1.99 echo "${flags}"
398 azarah 1.96
399 azarah 1.99 # Just bail if we dont have any flags
400     [[ -n ${flags} ]]
401 azarah 1.96 }
402    
403 vapier 1.121 # @FUNCTION: test-flags-CC
404     # @USAGE: <flags>
405     # @DESCRIPTION:
406     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
407 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
408    
409 vapier 1.121 # @FUNCTION: test-flags-CXX
410     # @USAGE: <flags>
411     # @DESCRIPTION:
412     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
413 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
414    
415 dberkholz 1.124 # @FUNCTION: test-flags-F77
416     # @USAGE: <flags>
417     # @DESCRIPTION:
418     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
419     test-flags-F77() { test-flags-PROG "F77" "$@"; }
420    
421     # @FUNCTION: test-flags-FC
422     # @USAGE: <flags>
423     # @DESCRIPTION:
424     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
425     test-flags-FC() { test-flags-PROG "FC" "$@"; }
426    
427 vapier 1.121 # @FUNCTION: test-flags
428     # @USAGE: <flags>
429     # @DESCRIPTION:
430 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
431 azarah 1.100 # its really only present due to the append-flags() abomination.
432 azarah 1.99 test-flags() { test-flags-CC "$@"; }
433    
434 vapier 1.121 # @FUNCTION: test_version_info
435     # @USAGE: <version>
436     # @DESCRIPTION:
437     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
438     # Accepts shell globs.
439 agriffis 1.58 test_version_info() {
440 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
441 agriffis 1.58 return 0
442     else
443     return 1
444     fi
445     }
446    
447 vapier 1.121 # @FUNCTION: strip-unsupported-flags
448     # @DESCRIPTION:
449 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
450 puggy 1.29 strip-unsupported-flags() {
451 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
452     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
453 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
454     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
455 azarah 1.8 }
456    
457 vapier 1.121 # @FUNCTION: get-flag
458     # @USAGE: <flag>
459     # @DESCRIPTION:
460     # Find and echo the value for a particular flag. Accepts shell globs.
461 vapier 1.10 get-flag() {
462 vapier 1.167 local f var findflag="$1"
463 agriffis 1.58
464 vapier 1.36 # this code looks a little flaky but seems to work for
465     # everything we want ...
466     # for example, if CFLAGS="-march=i686":
467 agriffis 1.58 # `get-flag -march` == "-march=i686"
468     # `get-flag march` == "i686"
469 vapier 1.167 for var in $(all-flag-vars) ; do
470     for f in ${!var} ; do
471     if [ "${f/${findflag}}" != "${f}" ] ; then
472     printf "%s\n" "${f/-${findflag}=}"
473     return 0
474     fi
475     done
476 vapier 1.10 done
477 vapier 1.28 return 1
478 joker 1.16 }
479    
480 vapier 1.121 # @FUNCTION: has_m64
481     # @DESCRIPTION:
482     # This doesn't test if the flag is accepted, it tests if the flag actually
483     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
484     # return code is 0, else the return code is 1.
485 lv 1.56 has_m64() {
486 vapier 1.166 eqawarn "${FUNCNAME}: don't use this anymore"
487    
488 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
489     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
490     # please dont replace this function with test_flag in some future
491     # clean-up!
492 swegener 1.101
493 vapier 1.72 local temp="$(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     [[ ${ret} != 1 ]] && return 0
500 lv 1.62 return 1
501 lv 1.56 }
502    
503     has_m32() {
504 vapier 1.166 die "${FUNCNAME}: don't use this anymore"
505 lv 1.56 }
506    
507 vapier 1.121 # @FUNCTION: replace-sparc64-flags
508     # @DESCRIPTION:
509     # Sets mcpu to v8 and uses the original value as mtune if none specified.
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 abcd 1.147 # @FUNCTION: append-libs
537     # @USAGE: <libs>
538     # @DESCRIPTION:
539     # Add extra <libs> to the current LIBS.
540     append-libs() {
541 vapier 1.158 [[ $# -eq 0 ]] && return 0
542 abcd 1.147 local flag
543     for flag in "$@"; do
544     [[ ${flag} == -l* ]] && flag=${flag#-l}
545     export LIBS="${LIBS} -l${flag}"
546     done
547    
548     return 0
549     }
550    
551 vapier 1.121 # @FUNCTION: append-ldflags
552     # @USAGE: <flags>
553     # @DESCRIPTION:
554     # Add extra <flags> to the current LDFLAGS.
555 solar 1.27 append-ldflags() {
556 vapier 1.158 [[ $# -eq 0 ]] && return 0
557 flameeyes 1.123 local flag
558     for flag in "$@"; do
559     [[ ${flag} == -l* ]] && \
560     ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
561     done
562    
563 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
564 vapier 1.28 return 0
565 solar 1.27 }
566    
567 vapier 1.121 # @FUNCTION: filter-ldflags
568     # @USAGE: <flags>
569     # @DESCRIPTION:
570     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
571 solar 1.41 filter-ldflags() {
572 kevquinn 1.105 _filter-var LDFLAGS "$@"
573 solar 1.41 return 0
574     }
575    
576 vapier 1.121 # @FUNCTION: raw-ldflags
577 vapier 1.156 # @USAGE: [flags]
578 vapier 1.121 # @DESCRIPTION:
579 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
580     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
581     # to gcc where it needs the '-Wl,'.
582 vapier 1.156 #
583     # If no flags are specified, then default to ${LDFLAGS}.
584 vapier 1.102 raw-ldflags() {
585     local x input="$@"
586     [[ -z ${input} ]] && input=${LDFLAGS}
587     set --
588     for x in ${input} ; do
589 vapier 1.103 x=${x#-Wl,}
590     set -- "$@" ${x//,/ }
591 vapier 1.102 done
592     echo "$@"
593     }
594    
595 ssuominen 1.145 # @FUNCTION: no-as-needed
596     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
597     no-as-needed() {
598     case $($(tc-getLD) -v 2>&1 </dev/null) in
599     *GNU*) # GNU ld
600     echo "-Wl,--no-as-needed" ;;
601     esac
602     }
603 vapier 1.113
604 vapier 1.160 fi

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