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Revision 1.129 - (hide annotations) (download)
Sun Jan 4 17:22:16 2009 UTC (5 years, 9 months ago) by vapier
Branch: MAIN
Changes since 1.128: +3 -17 lines
neuter bindnow-flags even more

1 vapier 1.129 # Copyright 1999-2009 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.129 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.128 2009/01/02 22:14:18 gengor 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 eradicator 1.80 inherit eutils toolchain-funcs multilib
14 vapier 1.72
15 kevquinn 1.92 ################ DEPRECATED functions ################
16     # The following are still present to avoid breaking existing
17     # code more than necessary; however they are deprecated. Please
18     # use gcc-specs-* from toolchain-funcs.eclass instead, if you
19     # need to know which hardened techs are active in the compiler.
20     # See bug #100974
21     #
22 vapier 1.121 # has_hardened
23     # has_pie
24     # has_pic
25     # has_ssp_all
26     # has_ssp
27    
28 verwilst 1.3
29 dberkholz 1.124 # {C,CXX,F,FC}FLAGS that we allow in strip-flags
30 vapier 1.117 # Note: shell globs and character lists are allowed
31 vapier 1.36 setup-allowed-flags() {
32 vapier 1.84 if [[ -z ${ALLOWED_FLAGS} ]] ; then
33 vapier 1.76 export ALLOWED_FLAGS="-pipe"
34     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
35 vapier 1.87 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 solar 1.127 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
37 kevquinn 1.105 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
38 vapier 1.117 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 vapier 1.107 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
40 dberkholz 1.120 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
41 vapier 1.44 fi
42 vapier 1.65 # allow a bunch of flags that negate features / control ABI
43 vapier 1.119 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 solar 1.127 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
45 vapier 1.87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46     -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
47     -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
48     -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 vapier 1.110 -mieee -mieee-with-inexact -mschedule \
50 vapier 1.91 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
51 vapier 1.87 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
52     -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
53 vapier 1.114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 solar 1.127 -msecure-plt -m*-toc -D* -U*"
55 vapier 1.36
56 dberkholz 1.124 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
57 vapier 1.36 # NOTE: currently -Os have issues with gcc3 and K6* arch's
58 vapier 1.106 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
59 vapier 1.36 return 0
60 aliz 1.24 }
61 verwilst 1.13
62 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
63     # the hardened compiler defaults.
64     _filter-hardened() {
65     local f
66     for f in "$@" ; do
67     case "${f}" in
68     # Ideally we should only concern ourselves with PIE flags,
69     # not -fPIC or -fpic, but too many places filter -fPIC without
70     # thinking about -fPIE.
71     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72     gcc-specs-pie || continue
73     is-flagq -nopie || append-flags -nopie;;
74     -fstack-protector)
75     gcc-specs-ssp || continue
76     is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
77     -fstack-protector-all)
78     gcc-specs-ssp-to-all || continue
79     is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
80 gengor 1.128 -fno-strict-overflow)
81     gcc-specs-nostrict || continue
82     is-flagq -fstrict-overflow || append-flags -fstrict-overflow;;
83 solar 1.27 esac
84     done
85 kevquinn 1.105 }
86    
87     # Remove occurrences of strings from variable given in $1
88     # Strings removed are matched as globs, so for example
89     # '-O*' would remove -O1, -O2 etc.
90     _filter-var() {
91     local f x VAR VAL
92     declare -a new
93 vapier 1.36
94 kevquinn 1.105 VAR=$1
95     shift
96     eval VAL=\${${VAR}}
97     for f in ${VAL}; do
98     for x in "$@"; do
99     # Note this should work with globs like -O*
100     [[ ${f} == ${x} ]] && continue 2
101 agriffis 1.61 done
102 kevquinn 1.105 eval new\[\${\#new\[@]}]=\${f}
103 verwilst 1.1 done
104 kevquinn 1.105 eval export ${VAR}=\${new\[*]}
105     }
106 agriffis 1.61
107 vapier 1.121 # @FUNCTION: filter-flags
108     # @USAGE: <flags>
109     # @DESCRIPTION:
110 dberkholz 1.124 # Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
111 kevquinn 1.105 filter-flags() {
112     _filter-hardened "$@"
113     _filter-var CFLAGS "$@"
114 vapier 1.118 _filter-var CPPFLAGS "$@"
115 kevquinn 1.105 _filter-var CXXFLAGS "$@"
116 dberkholz 1.124 _filter-var FFLAGS "$@"
117     _filter-var FCFLAGS "$@"
118 vapier 1.36 return 0
119 verwilst 1.2 }
120    
121 vapier 1.121 # @FUNCTION: filter-lfs-flags
122     # @DESCRIPTION:
123     # Remove flags that enable Large File Support.
124 vapier 1.40 filter-lfs-flags() {
125 vapier 1.93 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
126 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127     }
128    
129 vapier 1.121 # @FUNCTION: append-cppflags
130     # @USAGE: <flags>
131     # @DESCRIPTION:
132     # Add extra <flags> to the current CPPFLAGS.
133 vapier 1.118 append-cppflags() {
134     [[ -z $* ]] && return 0
135     export CPPFLAGS="${CPPFLAGS} $*"
136     return 0
137     }
138    
139 dberkholz 1.124 # @FUNCTION: append-fflags
140     # @USAGE: <flags>
141     # @DESCRIPTION:
142     # Add extra <flags> to the current {F,FC}FLAGS.
143     append-fflags() {
144     [[ -z $* ]] && return 0
145     export FFLAGS="${FFLAGS} $*"
146     export FCFLAGS="${FCFLAGS} $*"
147     return 0
148     }
149    
150 vapier 1.121 # @FUNCTION: append-lfs-flags
151     # @DESCRIPTION:
152     # Add flags that enable Large File Support.
153 vapier 1.48 append-lfs-flags() {
154 vapier 1.93 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
155 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
156 vapier 1.48 }
157    
158 vapier 1.121 # @FUNCTION: append-flags
159     # @USAGE: <flags>
160     # @DESCRIPTION:
161 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
162 vapier 1.18 append-flags() {
163 solar 1.82 [[ -z $* ]] && return 0
164 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
165     export CXXFLAGS="${CXXFLAGS} $*"
166 dberkholz 1.124 export FFLAGS="${FFLAGS} $*"
167     export FCFLAGS="${FCFLAGS} $*"
168 vapier 1.28 return 0
169 verwilst 1.1 }
170    
171 vapier 1.121 # @FUNCTION: replace-flags
172     # @USAGE: <old> <new>
173     # @DESCRIPTION:
174     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
175 vapier 1.18 replace-flags() {
176 vapier 1.93 [[ $# != 2 ]] \
177     && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
178     && die "replace-flags takes 2 arguments, not $#"
179    
180 mr_bones_ 1.83 local f fset
181 dirtyepic 1.125 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
182 agriffis 1.64
183 dberkholz 1.124 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
184 agriffis 1.64 # Looping over the flags instead of using a global
185     # substitution ensures that we're working with flag atoms.
186     # Otherwise globs like -O* have the potential to wipe out the
187     # list of flags.
188     for f in ${!fset}; do
189     # Note this should work with globs like -O*
190     [[ ${f} == ${1} ]] && f=${2}
191     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
192     done
193     eval export ${fset}=\${new_${fset}\[*]}
194     done
195    
196 vapier 1.28 return 0
197 danarmak 1.7 }
198    
199 vapier 1.121 # @FUNCTION: replace-cpu-flags
200     # @USAGE: <old> <new>
201     # @DESCRIPTION:
202     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
203     # with flags that select the <new> cpu. Accepts shell globs for <old>.
204 vapier 1.37 replace-cpu-flags() {
205 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
206     while [ $# -gt 1 ] ; do
207 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
208 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
209 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
210     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
211     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
212     shift
213 vapier 1.37 done
214     return 0
215     }
216    
217 vapier 1.113 _is_flagq() {
218 kevquinn 1.105 local x
219 vapier 1.113 for x in ${!1} ; do
220     [[ ${x} == $2 ]] && return 0
221 kevquinn 1.105 done
222     return 1
223     }
224    
225 vapier 1.121 # @FUNCTION: is-flagq
226     # @USAGE: <flag>
227     # @DESCRIPTION:
228 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
229 vapier 1.113 is-flagq() {
230     [[ -n $2 ]] && die "Usage: is-flag <flag>"
231 dberkholz 1.124 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
232 vapier 1.113 }
233    
234 vapier 1.121 # @FUNCTION: is-flag
235     # @USAGE: <flag>
236     # @DESCRIPTION:
237 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
238 danarmak 1.7 is-flag() {
239 vapier 1.113 is-flagq "$@" && echo true
240 kevquinn 1.105 }
241    
242 vapier 1.121 # @FUNCTION: is-ldflagq
243     # @USAGE: <flag>
244     # @DESCRIPTION:
245     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
246 kevquinn 1.105 is-ldflagq() {
247 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
248     _is_flagq LDFLAGS $1
249 verwilst 1.1 }
250 azarah 1.8
251 vapier 1.121 # @FUNCTION: is-ldflag
252     # @USAGE: <flag>
253     # @DESCRIPTION:
254     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
255 kevquinn 1.105 is-ldflag() {
256 vapier 1.113 is-ldflagq "$@" && echo true
257 kevquinn 1.105 }
258    
259 vapier 1.121 # @FUNCTION: filter-mfpmath
260     # @USAGE: <math types>
261     # @DESCRIPTION:
262     # Remove specified math types from the fpmath flag. For example, if the user
263     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
264     # -mfpmath=386.
265 vapier 1.36 filter-mfpmath() {
266 agriffis 1.58 local orig_mfpmath new_math prune_math
267    
268 vapier 1.36 # save the original -mfpmath flag
269 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
270 vapier 1.36 # get the value of the current -mfpmath flag
271 vapier 1.109 new_math=$(get-flag mfpmath)
272     new_math=" ${new_math//,/ } "
273 vapier 1.36 # figure out which math values are to be removed
274 agriffis 1.58 prune_math=""
275 vapier 1.36 for prune_math in "$@" ; do
276 vapier 1.109 new_math=${new_math/ ${prune_math} / }
277 vapier 1.36 done
278 vapier 1.109 new_math=$(echo ${new_math})
279     new_math=${new_math// /,}
280 vapier 1.36
281 vapier 1.109 if [[ -z ${new_math} ]] ; then
282 vapier 1.36 # if we're removing all user specified math values are
283     # slated for removal, then we just filter the flag
284     filter-flags ${orig_mfpmath}
285     else
286     # if we only want to filter some of the user specified
287     # math values, then we replace the current flag
288     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
289     fi
290     return 0
291     }
292    
293 vapier 1.121 # @FUNCTION: strip-flags
294     # @DESCRIPTION:
295     # Strip C[XX]FLAGS of everything except known good/safe flags.
296 azarah 1.8 strip-flags() {
297 dberkholz 1.124 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
298 agriffis 1.58
299 vapier 1.36 setup-allowed-flags
300    
301 azarah 1.8 local NEW_CFLAGS=""
302     local NEW_CXXFLAGS=""
303 dberkholz 1.124 local NEW_FFLAGS=""
304     local NEW_FCFLAGS=""
305 azarah 1.8
306 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
307 vapier 1.84 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
308 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
309     fi
310    
311 agriffis 1.58 set -f # disable pathname expansion
312 azarah 1.8
313 agriffis 1.58 for x in ${CFLAGS}; do
314     for y in ${ALLOWED_FLAGS}; do
315 lostlogic 1.14 flag=${x%%=*}
316 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
317 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
318     break
319 azarah 1.8 fi
320     done
321     done
322    
323 agriffis 1.58 for x in ${CXXFLAGS}; do
324     for y in ${ALLOWED_FLAGS}; do
325 lostlogic 1.14 flag=${x%%=*}
326 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
327 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
328     break
329 azarah 1.8 fi
330     done
331     done
332 azarah 1.30
333 dberkholz 1.124 for x in ${FFLAGS}; do
334     for y in ${ALLOWED_FLAGS}; do
335     flag=${x%%=*}
336     if [ "${flag%%${y}}" = "" ] ; then
337     NEW_FFLAGS="${NEW_FFLAGS} ${x}"
338     break
339     fi
340     done
341     done
342    
343     for x in ${FCFLAGS}; do
344     for y in ${ALLOWED_FLAGS}; do
345     flag=${x%%=*}
346     if [ "${flag%%${y}}" = "" ] ; then
347     NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
348     break
349     fi
350     done
351     done
352    
353 azarah 1.30 # In case we filtered out all optimization flags fallback to -O2
354     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
355     NEW_CFLAGS="${NEW_CFLAGS} -O2"
356     fi
357     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
358     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
359     fi
360 dberkholz 1.124 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
361     NEW_FFLAGS="${NEW_FFLAGS} -O2"
362     fi
363     if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
364     NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
365     fi
366 azarah 1.8
367 agriffis 1.58 set +f # re-enable pathname expansion
368 azarah 1.8
369     export CFLAGS="${NEW_CFLAGS}"
370     export CXXFLAGS="${NEW_CXXFLAGS}"
371 dberkholz 1.124 export FFLAGS="${NEW_FFLAGS}"
372     export FCFLAGS="${NEW_FCFLAGS}"
373 vapier 1.36 return 0
374 puggy 1.29 }
375    
376 azarah 1.96 test-flag-PROG() {
377     local comp=$1
378     local flags="$2"
379    
380     [[ -z ${comp} || -z ${flags} ]] && \
381     return 1
382    
383     local PROG=$(tc-get${comp})
384     ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
385     > /dev/null 2>&1
386     }
387    
388 vapier 1.121 # @FUNCTION: test-flag-CC
389     # @USAGE: <flag>
390     # @DESCRIPTION:
391     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
392 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
393    
394 vapier 1.121 # @FUNCTION: test-flag-CXX
395     # @USAGE: <flag>
396     # @DESCRIPTION:
397     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
398 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
399    
400 dberkholz 1.124 # @FUNCTION: test-flag-F77
401     # @USAGE: <flag>
402     # @DESCRIPTION:
403     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
404     test-flag-F77() { test-flag-PROG "F77" "$1"; }
405    
406     # @FUNCTION: test-flag-FC
407     # @USAGE: <flag>
408     # @DESCRIPTION:
409     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
410     test-flag-FC() { test-flag-PROG "FC" "$1"; }
411    
412 azarah 1.99 test-flags-PROG() {
413     local comp=$1
414     local flags
415 azarah 1.96 local x
416 azarah 1.99
417     shift
418    
419 vapier 1.113 [[ -z ${comp} ]] && return 1
420 swegener 1.101
421 vapier 1.113 x=""
422 azarah 1.96 for x in "$@" ; do
423 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
424 azarah 1.96 done
425    
426 azarah 1.99 echo "${flags}"
427 azarah 1.96
428 azarah 1.99 # Just bail if we dont have any flags
429     [[ -n ${flags} ]]
430 azarah 1.96 }
431    
432 vapier 1.121 # @FUNCTION: test-flags-CC
433     # @USAGE: <flags>
434     # @DESCRIPTION:
435     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
436 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
437    
438 vapier 1.121 # @FUNCTION: test-flags-CXX
439     # @USAGE: <flags>
440     # @DESCRIPTION:
441     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
442 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
443    
444 dberkholz 1.124 # @FUNCTION: test-flags-F77
445     # @USAGE: <flags>
446     # @DESCRIPTION:
447     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
448     test-flags-F77() { test-flags-PROG "F77" "$@"; }
449    
450     # @FUNCTION: test-flags-FC
451     # @USAGE: <flags>
452     # @DESCRIPTION:
453     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
454     test-flags-FC() { test-flags-PROG "FC" "$@"; }
455    
456 vapier 1.121 # @FUNCTION: test-flags
457     # @USAGE: <flags>
458     # @DESCRIPTION:
459 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
460 azarah 1.100 # its really only present due to the append-flags() abomination.
461 azarah 1.99 test-flags() { test-flags-CC "$@"; }
462    
463 vapier 1.121 # @FUNCTION: test_flag
464     # @DESCRIPTION:
465     # DEPRICIATED, use test-flags()
466 vapier 1.36 test_flag() {
467 kevquinn 1.104 ewarn "test_flag: deprecated, please use test-flags()!" >&2
468 azarah 1.96
469 azarah 1.99 test-flags-CC "$@"
470 puggy 1.29 }
471    
472 vapier 1.121 # @FUNCTION: test_version_info
473     # @USAGE: <version>
474     # @DESCRIPTION:
475     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
476     # Accepts shell globs.
477 agriffis 1.58 test_version_info() {
478 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
479 agriffis 1.58 return 0
480     else
481     return 1
482     fi
483     }
484    
485 vapier 1.121 # @FUNCTION: strip-unsupported-flags
486     # @DESCRIPTION:
487 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
488 puggy 1.29 strip-unsupported-flags() {
489 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
490     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
491 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
492     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
493 azarah 1.8 }
494    
495 vapier 1.121 # @FUNCTION: get-flag
496     # @USAGE: <flag>
497     # @DESCRIPTION:
498     # Find and echo the value for a particular flag. Accepts shell globs.
499 vapier 1.10 get-flag() {
500 agriffis 1.58 local f findflag="$1"
501    
502 vapier 1.36 # this code looks a little flaky but seems to work for
503     # everything we want ...
504     # for example, if CFLAGS="-march=i686":
505 agriffis 1.58 # `get-flag -march` == "-march=i686"
506     # `get-flag march` == "i686"
507 dberkholz 1.124 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
508 vapier 1.10 if [ "${f/${findflag}}" != "${f}" ] ; then
509 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
510 vapier 1.28 return 0
511 vapier 1.10 fi
512     done
513 vapier 1.28 return 1
514 joker 1.16 }
515    
516 vapier 1.121 # @FUNCTION: has_hardened
517     # @DESCRIPTION:
518 kevquinn 1.92 # DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
519 solar 1.53 has_hardened() {
520 kevquinn 1.104 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
521 swegener 1.101
522 lv 1.69 test_version_info Hardened && return 0
523 azarah 1.96 # The specs file wont exist unless gcc has GCC_SPECS support
524     [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
525 solar 1.53 }
526    
527 vapier 1.121 # @FUNCTION: has_pic
528     # @DESCRIPTION:
529 kevquinn 1.92 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
530 solar 1.81 # indicate whether PIC is set
531 tseng 1.42 has_pic() {
532 kevquinn 1.104 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
533 swegener 1.101
534 azarah 1.96 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
535 kevquinn 1.105 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
536     gcc-specs-pie
537 tseng 1.42 }
538    
539 vapier 1.121 # @FUNCTION: has_pie
540     # @DESCRIPTION:
541 kevquinn 1.92 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
542 solar 1.81 # indicate whether PIE is set
543 mr_bones_ 1.83 has_pie() {
544 kevquinn 1.104 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
545 swegener 1.101
546 azarah 1.96 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
547 kevquinn 1.105 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
548     gcc-specs-pie
549 tseng 1.42 }
550 mr_bones_ 1.83
551 vapier 1.121 # @FUNCTION: has_ssp_all
552     # @DESCRIPTION:
553 kevquinn 1.92 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
554 solar 1.86 # indicate whether code for SSP is being generated for all functions
555     has_ssp_all() {
556 kevquinn 1.104 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
557 swegener 1.101
558 solar 1.86 # note; this matches only -fstack-protector-all
559 azarah 1.96 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
560     -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
561 kevquinn 1.105 gcc-specs-ssp-all
562 solar 1.86 }
563    
564 vapier 1.121 # @FUNCTION: has_ssp
565     # @DESCRIPTION:
566 kevquinn 1.92 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
567 solar 1.81 # indicate whether code for SSP is being generated
568 tseng 1.42 has_ssp() {
569 kevquinn 1.104 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
570 swegener 1.101
571 solar 1.81 # note; this matches both -fstack-protector and -fstack-protector-all
572 azarah 1.96 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
573     -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
574     gcc-specs-ssp
575 tseng 1.42 }
576    
577 vapier 1.121 # @FUNCTION: has_m64
578     # @DESCRIPTION:
579     # This doesn't test if the flag is accepted, it tests if the flag actually
580     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
581     # return code is 0, else the return code is 1.
582 lv 1.56 has_m64() {
583 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
584     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
585     # please dont replace this function with test_flag in some future
586     # clean-up!
587 swegener 1.101
588 vapier 1.72 local temp="$(emktemp)"
589 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
590 kugelfang 1.74 MY_CC=$(tc-getCC)
591 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
592 vapier 1.72 local ret=$?
593 azarah 1.96 rm -f "${temp}".c
594     [[ ${ret} != 1 ]] && return 0
595 lv 1.62 return 1
596 lv 1.56 }
597    
598 vapier 1.121 # @FUNCTION: has_m32
599     # @DESCRIPTION:
600     # This doesn't test if the flag is accepted, it tests if the flag actually
601     # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
602     # code is 0, else return code is 1.
603 lv 1.56 has_m32() {
604 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
605     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
606     # please dont replace this function with test_flag in some future
607     # clean-up!
608 eradicator 1.80
609     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
610    
611 vapier 1.95 local temp=$(emktemp)
612     echo "int main() { return(0); }" > "${temp}".c
613 kugelfang 1.74 MY_CC=$(tc-getCC)
614 vapier 1.95 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
615 vapier 1.72 local ret=$?
616 vapier 1.95 rm -f "${temp}".c
617 azarah 1.96 [[ ${ret} != 1 ]] && return 0
618 lv 1.62 return 1
619 lv 1.56 }
620    
621 vapier 1.121 # @FUNCTION: replace-sparc64-flags
622     # @DESCRIPTION:
623     # Sets mcpu to v8 and uses the original value as mtune if none specified.
624 vapier 1.18 replace-sparc64-flags() {
625 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
626 joker 1.16
627 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
628 agriffis 1.58 for x in ${SPARC64_CPUS}; do
629 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
630     done
631 mr_bones_ 1.83 else
632 swegener 1.111 for x in ${SPARC64_CPUS}; do
633 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
634     done
635     fi
636 mr_bones_ 1.83
637     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
638 agriffis 1.58 for x in ${SPARC64_CPUS}; do
639 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
640     done
641     else
642 swegener 1.111 for x in ${SPARC64_CPUS}; do
643 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
644     done
645     fi
646 vapier 1.59
647     export CFLAGS CXXFLAGS
648 solar 1.27 }
649    
650 vapier 1.121 # @FUNCTION: append-ldflags
651     # @USAGE: <flags>
652     # @DESCRIPTION:
653     # Add extra <flags> to the current LDFLAGS.
654 solar 1.27 append-ldflags() {
655 kevquinn 1.105 [[ -z $* ]] && return 0
656 flameeyes 1.123 local flag
657     for flag in "$@"; do
658     [[ ${flag} == -l* ]] && \
659     ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
660     done
661    
662 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
663 vapier 1.28 return 0
664 solar 1.27 }
665    
666 vapier 1.121 # @FUNCTION: filter-ldflags
667     # @USAGE: <flags>
668     # @DESCRIPTION:
669     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
670 solar 1.41 filter-ldflags() {
671 kevquinn 1.105 _filter-var LDFLAGS "$@"
672 solar 1.41 return 0
673     }
674    
675 vapier 1.121 # @FUNCTION: raw-ldflags
676     # @USAGE: <flags>
677     # @DESCRIPTION:
678 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
679     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
680     # to gcc where it needs the '-Wl,'.
681 vapier 1.102 raw-ldflags() {
682     local x input="$@"
683     [[ -z ${input} ]] && input=${LDFLAGS}
684     set --
685     for x in ${input} ; do
686 vapier 1.103 x=${x#-Wl,}
687     set -- "$@" ${x//,/ }
688 vapier 1.102 done
689     echo "$@"
690     }
691    
692 vapier 1.121 # @FUNCTION: bindnow-flags
693     # @RETURN: Returns the flags to enable "now" binding in the current selected linker.
694     # @DESCRIPTION:
695     # DEPRECATED - Gets the flags needed for "NOW" binding
696 flameeyes 1.94 bindnow-flags() {
697 vapier 1.129 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
698 flameeyes 1.94 }
699 vapier 1.113
700    
701     # Some tests for when we screw with things and want to make
702     # sure we didn't break anything
703     #TESTS() {
704     # CFLAGS="-a -b -c=1"
705     # CXXFLAGS="-x -y -z=2"
706     # LDFLAGS="-l -m -n=3"
707     #
708     # die() { exit 1; }
709     # (is-flag 1 2 3) && die
710     # (is-ldflag 1 2 3) && die
711     #
712     # is-flagq -l && die
713     # is-ldflagq -a && die
714     # is-flagq -a || die
715     # is-flagq -x || die
716     # is-ldflagq -n=* || die
717     # is-ldflagq -n && die
718     #
719     # strip-unsupported-flags
720     # [[ ${CFLAGS} == "-c=1" ]] || die
721     # [[ ${CXXFLAGS} == "-y -z=2" ]] || die
722     #
723     # echo "All tests pass"
724     #}
725     #TESTS

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