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Revision 1.153 - (hide annotations) (download)
Wed Aug 17 17:54:48 2011 UTC (3 years ago) by vapier
Branch: MAIN
Changes since 1.152: +5 -1 lines
document what each LFS flag does exactly

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 1.153 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.152 2011/07/12 04:08:52 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 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 dirtyepic 1.150 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 dberkholz 1.120 export ALLOWED_FLAGS="${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="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 vapier 1.135 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
45 vapier 1.87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 dirtyepic 1.139 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47     -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48     -mno-popcnt -mno-abm \
49 vapier 1.140 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 vapier 1.87 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 dirtyepic 1.149 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
52 vapier 1.91 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
53 vapier 1.87 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
54     -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
55 vapier 1.114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 solar 1.127 -msecure-plt -m*-toc -D* -U*"
57 vapier 1.135
58 dirtyepic 1.148 # 4.5
59     ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 dirtyepic 1.149 # 4.6
61     ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62     -mno-bmi -mno-tbm"
63 dirtyepic 1.148
64 dberkholz 1.124 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
65 vapier 1.36 # NOTE: currently -Os have issues with gcc3 and K6* arch's
66 vapier 1.106 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
67 vapier 1.36 return 0
68 aliz 1.24 }
69 verwilst 1.13
70 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
71     # the hardened compiler defaults.
72     _filter-hardened() {
73     local f
74     for f in "$@" ; do
75     case "${f}" in
76     # Ideally we should only concern ourselves with PIE flags,
77     # not -fPIC or -fpic, but too many places filter -fPIC without
78     # thinking about -fPIE.
79     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
80     gcc-specs-pie || continue
81     is-flagq -nopie || append-flags -nopie;;
82     -fstack-protector)
83     gcc-specs-ssp || continue
84 gengor 1.131 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
85 kevquinn 1.105 -fstack-protector-all)
86     gcc-specs-ssp-to-all || continue
87 gengor 1.131 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 gengor 1.128 -fno-strict-overflow)
89     gcc-specs-nostrict || continue
90 gengor 1.131 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
91 solar 1.27 esac
92     done
93 kevquinn 1.105 }
94    
95     # Remove occurrences of strings from variable given in $1
96     # Strings removed are matched as globs, so for example
97     # '-O*' would remove -O1, -O2 etc.
98     _filter-var() {
99     local f x VAR VAL
100     declare -a new
101 vapier 1.36
102 kevquinn 1.105 VAR=$1
103     shift
104     eval VAL=\${${VAR}}
105     for f in ${VAL}; do
106     for x in "$@"; do
107     # Note this should work with globs like -O*
108     [[ ${f} == ${x} ]] && continue 2
109 agriffis 1.61 done
110 kevquinn 1.105 eval new\[\${\#new\[@]}]=\${f}
111 verwilst 1.1 done
112 kevquinn 1.105 eval export ${VAR}=\${new\[*]}
113     }
114 agriffis 1.61
115 vapier 1.121 # @FUNCTION: filter-flags
116     # @USAGE: <flags>
117     # @DESCRIPTION:
118 dberkholz 1.124 # Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
119 kevquinn 1.105 filter-flags() {
120     _filter-hardened "$@"
121     _filter-var CFLAGS "$@"
122 vapier 1.118 _filter-var CPPFLAGS "$@"
123 kevquinn 1.105 _filter-var CXXFLAGS "$@"
124 dberkholz 1.124 _filter-var FFLAGS "$@"
125     _filter-var FCFLAGS "$@"
126 vapier 1.36 return 0
127 verwilst 1.2 }
128    
129 vapier 1.121 # @FUNCTION: filter-lfs-flags
130     # @DESCRIPTION:
131     # Remove flags that enable Large File Support.
132 vapier 1.40 filter-lfs-flags() {
133 vapier 1.93 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
134 vapier 1.153 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
135     # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
136     # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
137     # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
138 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
139     }
140    
141 vapier 1.121 # @FUNCTION: append-cppflags
142     # @USAGE: <flags>
143     # @DESCRIPTION:
144     # Add extra <flags> to the current CPPFLAGS.
145 vapier 1.118 append-cppflags() {
146     [[ -z $* ]] && return 0
147     export CPPFLAGS="${CPPFLAGS} $*"
148     return 0
149     }
150    
151 vapier 1.136 # @FUNCTION: append-cflags
152     # @USAGE: <flags>
153     # @DESCRIPTION:
154     # Add extra <flags> to the current CFLAGS.
155 mr_bones_ 1.137 append-cflags() {
156 vapier 1.136 [[ -z $* ]] && return 0
157     export CFLAGS="${CFLAGS} $*"
158     return 0
159     }
160    
161 gengor 1.132 # @FUNCTION: append-cxxflags
162     # @USAGE: <flags>
163     # @DESCRIPTION:
164     # Add extra <flags> to the current CXXFLAGS.
165     append-cxxflags() {
166     [[ -z $* ]] && return 0
167     export CXXFLAGS="${CXXFLAGS} $*"
168     return 0
169     }
170    
171 dberkholz 1.124 # @FUNCTION: append-fflags
172     # @USAGE: <flags>
173     # @DESCRIPTION:
174     # Add extra <flags> to the current {F,FC}FLAGS.
175     append-fflags() {
176     [[ -z $* ]] && return 0
177     export FFLAGS="${FFLAGS} $*"
178     export FCFLAGS="${FCFLAGS} $*"
179     return 0
180     }
181    
182 vapier 1.121 # @FUNCTION: append-lfs-flags
183     # @DESCRIPTION:
184     # Add flags that enable Large File Support.
185 vapier 1.48 append-lfs-flags() {
186 vapier 1.93 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
187 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
188 vapier 1.48 }
189    
190 vapier 1.121 # @FUNCTION: append-flags
191     # @USAGE: <flags>
192     # @DESCRIPTION:
193 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
194 vapier 1.18 append-flags() {
195 solar 1.82 [[ -z $* ]] && return 0
196 vapier 1.136 append-cflags "$@"
197 vapier 1.138 append-cxxflags "$@"
198 vapier 1.136 append-fflags "$@"
199 vapier 1.28 return 0
200 verwilst 1.1 }
201    
202 vapier 1.121 # @FUNCTION: replace-flags
203     # @USAGE: <old> <new>
204     # @DESCRIPTION:
205     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
206 vapier 1.18 replace-flags() {
207 vapier 1.93 [[ $# != 2 ]] \
208     && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
209     && die "replace-flags takes 2 arguments, not $#"
210    
211 mr_bones_ 1.83 local f fset
212 dirtyepic 1.125 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
213 agriffis 1.64
214 dberkholz 1.124 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
215 agriffis 1.64 # Looping over the flags instead of using a global
216     # substitution ensures that we're working with flag atoms.
217     # Otherwise globs like -O* have the potential to wipe out the
218     # list of flags.
219     for f in ${!fset}; do
220     # Note this should work with globs like -O*
221     [[ ${f} == ${1} ]] && f=${2}
222     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
223     done
224     eval export ${fset}=\${new_${fset}\[*]}
225     done
226    
227 vapier 1.28 return 0
228 danarmak 1.7 }
229    
230 vapier 1.121 # @FUNCTION: replace-cpu-flags
231     # @USAGE: <old> <new>
232     # @DESCRIPTION:
233     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
234     # with flags that select the <new> cpu. Accepts shell globs for <old>.
235 vapier 1.37 replace-cpu-flags() {
236 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
237     while [ $# -gt 1 ] ; do
238 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
239 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
240 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
241     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
242     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
243     shift
244 vapier 1.37 done
245     return 0
246     }
247    
248 vapier 1.113 _is_flagq() {
249 kevquinn 1.105 local x
250 vapier 1.113 for x in ${!1} ; do
251     [[ ${x} == $2 ]] && return 0
252 kevquinn 1.105 done
253     return 1
254     }
255    
256 vapier 1.121 # @FUNCTION: is-flagq
257     # @USAGE: <flag>
258     # @DESCRIPTION:
259 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
260 vapier 1.113 is-flagq() {
261     [[ -n $2 ]] && die "Usage: is-flag <flag>"
262 dberkholz 1.124 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
263 vapier 1.113 }
264    
265 vapier 1.121 # @FUNCTION: is-flag
266     # @USAGE: <flag>
267     # @DESCRIPTION:
268 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
269 danarmak 1.7 is-flag() {
270 vapier 1.113 is-flagq "$@" && echo true
271 kevquinn 1.105 }
272    
273 vapier 1.121 # @FUNCTION: is-ldflagq
274     # @USAGE: <flag>
275     # @DESCRIPTION:
276     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
277 kevquinn 1.105 is-ldflagq() {
278 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
279     _is_flagq LDFLAGS $1
280 verwilst 1.1 }
281 azarah 1.8
282 vapier 1.121 # @FUNCTION: is-ldflag
283     # @USAGE: <flag>
284     # @DESCRIPTION:
285     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
286 kevquinn 1.105 is-ldflag() {
287 vapier 1.113 is-ldflagq "$@" && echo true
288 kevquinn 1.105 }
289    
290 vapier 1.121 # @FUNCTION: filter-mfpmath
291     # @USAGE: <math types>
292     # @DESCRIPTION:
293     # Remove specified math types from the fpmath flag. For example, if the user
294     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
295     # -mfpmath=386.
296 vapier 1.36 filter-mfpmath() {
297 agriffis 1.58 local orig_mfpmath new_math prune_math
298    
299 vapier 1.36 # save the original -mfpmath flag
300 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
301 vapier 1.36 # get the value of the current -mfpmath flag
302 vapier 1.109 new_math=$(get-flag mfpmath)
303     new_math=" ${new_math//,/ } "
304 vapier 1.36 # figure out which math values are to be removed
305 agriffis 1.58 prune_math=""
306 vapier 1.36 for prune_math in "$@" ; do
307 vapier 1.109 new_math=${new_math/ ${prune_math} / }
308 vapier 1.36 done
309 vapier 1.109 new_math=$(echo ${new_math})
310     new_math=${new_math// /,}
311 vapier 1.36
312 vapier 1.109 if [[ -z ${new_math} ]] ; then
313 vapier 1.36 # if we're removing all user specified math values are
314     # slated for removal, then we just filter the flag
315     filter-flags ${orig_mfpmath}
316     else
317     # if we only want to filter some of the user specified
318     # math values, then we replace the current flag
319     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
320     fi
321     return 0
322     }
323    
324 vapier 1.121 # @FUNCTION: strip-flags
325     # @DESCRIPTION:
326     # Strip C[XX]FLAGS of everything except known good/safe flags.
327 azarah 1.8 strip-flags() {
328 dberkholz 1.124 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
329 agriffis 1.58
330 vapier 1.36 setup-allowed-flags
331    
332 azarah 1.8 local NEW_CFLAGS=""
333     local NEW_CXXFLAGS=""
334 dberkholz 1.124 local NEW_FFLAGS=""
335     local NEW_FCFLAGS=""
336 azarah 1.8
337 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
338 vapier 1.144 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
339 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
340     fi
341    
342 agriffis 1.58 set -f # disable pathname expansion
343 azarah 1.8
344 agriffis 1.58 for x in ${CFLAGS}; do
345     for y in ${ALLOWED_FLAGS}; do
346 lostlogic 1.14 flag=${x%%=*}
347 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
348 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
349     break
350 azarah 1.8 fi
351     done
352     done
353    
354 agriffis 1.58 for x in ${CXXFLAGS}; do
355     for y in ${ALLOWED_FLAGS}; do
356 lostlogic 1.14 flag=${x%%=*}
357 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
358 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
359     break
360 azarah 1.8 fi
361     done
362     done
363 azarah 1.30
364 dberkholz 1.124 for x in ${FFLAGS}; do
365     for y in ${ALLOWED_FLAGS}; do
366     flag=${x%%=*}
367     if [ "${flag%%${y}}" = "" ] ; then
368     NEW_FFLAGS="${NEW_FFLAGS} ${x}"
369     break
370     fi
371     done
372     done
373    
374     for x in ${FCFLAGS}; do
375     for y in ${ALLOWED_FLAGS}; do
376     flag=${x%%=*}
377     if [ "${flag%%${y}}" = "" ] ; then
378     NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
379     break
380     fi
381     done
382     done
383    
384 azarah 1.30 # In case we filtered out all optimization flags fallback to -O2
385     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
386     NEW_CFLAGS="${NEW_CFLAGS} -O2"
387     fi
388     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
389     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
390     fi
391 dberkholz 1.124 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
392     NEW_FFLAGS="${NEW_FFLAGS} -O2"
393     fi
394     if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
395     NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
396     fi
397 azarah 1.8
398 agriffis 1.58 set +f # re-enable pathname expansion
399 azarah 1.8
400     export CFLAGS="${NEW_CFLAGS}"
401     export CXXFLAGS="${NEW_CXXFLAGS}"
402 dberkholz 1.124 export FFLAGS="${NEW_FFLAGS}"
403     export FCFLAGS="${NEW_FCFLAGS}"
404 vapier 1.36 return 0
405 puggy 1.29 }
406    
407 azarah 1.96 test-flag-PROG() {
408     local comp=$1
409     local flags="$2"
410    
411 vapier 1.152 [[ -z ${comp} || -z ${flags} ]] && return 1
412 azarah 1.96
413 vapier 1.152 # use -c so we can test the assembler as well
414 azarah 1.96 local PROG=$(tc-get${comp})
415 vapier 1.152 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
416 azarah 1.96 > /dev/null 2>&1
417     }
418    
419 vapier 1.121 # @FUNCTION: test-flag-CC
420     # @USAGE: <flag>
421     # @DESCRIPTION:
422     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
423 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
424    
425 vapier 1.121 # @FUNCTION: test-flag-CXX
426     # @USAGE: <flag>
427     # @DESCRIPTION:
428     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
429 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
430    
431 dberkholz 1.124 # @FUNCTION: test-flag-F77
432     # @USAGE: <flag>
433     # @DESCRIPTION:
434     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
435     test-flag-F77() { test-flag-PROG "F77" "$1"; }
436    
437     # @FUNCTION: test-flag-FC
438     # @USAGE: <flag>
439     # @DESCRIPTION:
440     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
441     test-flag-FC() { test-flag-PROG "FC" "$1"; }
442    
443 azarah 1.99 test-flags-PROG() {
444     local comp=$1
445     local flags
446 azarah 1.96 local x
447 azarah 1.99
448     shift
449    
450 vapier 1.113 [[ -z ${comp} ]] && return 1
451 swegener 1.101
452 vapier 1.113 x=""
453 azarah 1.96 for x in "$@" ; do
454 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
455 azarah 1.96 done
456    
457 azarah 1.99 echo "${flags}"
458 azarah 1.96
459 azarah 1.99 # Just bail if we dont have any flags
460     [[ -n ${flags} ]]
461 azarah 1.96 }
462    
463 vapier 1.121 # @FUNCTION: test-flags-CC
464     # @USAGE: <flags>
465     # @DESCRIPTION:
466     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
467 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
468    
469 vapier 1.121 # @FUNCTION: test-flags-CXX
470     # @USAGE: <flags>
471     # @DESCRIPTION:
472     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
473 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
474    
475 dberkholz 1.124 # @FUNCTION: test-flags-F77
476     # @USAGE: <flags>
477     # @DESCRIPTION:
478     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
479     test-flags-F77() { test-flags-PROG "F77" "$@"; }
480    
481     # @FUNCTION: test-flags-FC
482     # @USAGE: <flags>
483     # @DESCRIPTION:
484     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
485     test-flags-FC() { test-flags-PROG "FC" "$@"; }
486    
487 vapier 1.121 # @FUNCTION: test-flags
488     # @USAGE: <flags>
489     # @DESCRIPTION:
490 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
491 azarah 1.100 # its really only present due to the append-flags() abomination.
492 azarah 1.99 test-flags() { test-flags-CC "$@"; }
493    
494 vapier 1.121 # @FUNCTION: test_version_info
495     # @USAGE: <version>
496     # @DESCRIPTION:
497     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
498     # Accepts shell globs.
499 agriffis 1.58 test_version_info() {
500 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
501 agriffis 1.58 return 0
502     else
503     return 1
504     fi
505     }
506    
507 vapier 1.121 # @FUNCTION: strip-unsupported-flags
508     # @DESCRIPTION:
509 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
510 puggy 1.29 strip-unsupported-flags() {
511 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
512     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
513 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
514     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
515 azarah 1.8 }
516    
517 vapier 1.121 # @FUNCTION: get-flag
518     # @USAGE: <flag>
519     # @DESCRIPTION:
520     # Find and echo the value for a particular flag. Accepts shell globs.
521 vapier 1.10 get-flag() {
522 agriffis 1.58 local f findflag="$1"
523    
524 vapier 1.36 # this code looks a little flaky but seems to work for
525     # everything we want ...
526     # for example, if CFLAGS="-march=i686":
527 agriffis 1.58 # `get-flag -march` == "-march=i686"
528     # `get-flag march` == "i686"
529 dberkholz 1.124 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
530 vapier 1.10 if [ "${f/${findflag}}" != "${f}" ] ; then
531 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
532 vapier 1.28 return 0
533 vapier 1.10 fi
534     done
535 vapier 1.28 return 1
536 joker 1.16 }
537    
538 vapier 1.151 # DEAD FUNCS. Remove by Dec 2011.
539     test_flag() { die "$0: deprecated, please use test-flags()!" ; }
540     has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
541     has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
542     has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
543     has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
544     has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
545 tseng 1.42
546 vapier 1.121 # @FUNCTION: has_m64
547     # @DESCRIPTION:
548     # This doesn't test if the flag is accepted, it tests if the flag actually
549     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
550     # return code is 0, else the return code is 1.
551 lv 1.56 has_m64() {
552 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
553     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
554     # please dont replace this function with test_flag in some future
555     # clean-up!
556 swegener 1.101
557 vapier 1.72 local temp="$(emktemp)"
558 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
559 kugelfang 1.74 MY_CC=$(tc-getCC)
560 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
561 vapier 1.72 local ret=$?
562 azarah 1.96 rm -f "${temp}".c
563     [[ ${ret} != 1 ]] && return 0
564 lv 1.62 return 1
565 lv 1.56 }
566    
567 vapier 1.121 # @FUNCTION: has_m32
568     # @DESCRIPTION:
569     # This doesn't test if the flag is accepted, it tests if the flag actually
570     # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
571     # code is 0, else return code is 1.
572 lv 1.56 has_m32() {
573 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
574     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
575     # please dont replace this function with test_flag in some future
576     # clean-up!
577 eradicator 1.80
578     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
579    
580 vapier 1.95 local temp=$(emktemp)
581     echo "int main() { return(0); }" > "${temp}".c
582 kugelfang 1.74 MY_CC=$(tc-getCC)
583 vapier 1.95 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
584 vapier 1.72 local ret=$?
585 vapier 1.95 rm -f "${temp}".c
586 azarah 1.96 [[ ${ret} != 1 ]] && return 0
587 lv 1.62 return 1
588 lv 1.56 }
589    
590 vapier 1.121 # @FUNCTION: replace-sparc64-flags
591     # @DESCRIPTION:
592     # Sets mcpu to v8 and uses the original value as mtune if none specified.
593 vapier 1.18 replace-sparc64-flags() {
594 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
595 joker 1.16
596 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
597 agriffis 1.58 for x in ${SPARC64_CPUS}; do
598 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
599     done
600 mr_bones_ 1.83 else
601 swegener 1.111 for x in ${SPARC64_CPUS}; do
602 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
603     done
604     fi
605 mr_bones_ 1.83
606     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
607 agriffis 1.58 for x in ${SPARC64_CPUS}; do
608 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
609     done
610     else
611 swegener 1.111 for x in ${SPARC64_CPUS}; do
612 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
613     done
614     fi
615 vapier 1.59
616     export CFLAGS CXXFLAGS
617 solar 1.27 }
618    
619 abcd 1.147 # @FUNCTION: append-libs
620     # @USAGE: <libs>
621     # @DESCRIPTION:
622     # Add extra <libs> to the current LIBS.
623     append-libs() {
624     [[ -z $* ]] && return 0
625     local flag
626     for flag in "$@"; do
627     [[ ${flag} == -l* ]] && flag=${flag#-l}
628     export LIBS="${LIBS} -l${flag}"
629     done
630    
631     return 0
632     }
633    
634 vapier 1.121 # @FUNCTION: append-ldflags
635     # @USAGE: <flags>
636     # @DESCRIPTION:
637     # Add extra <flags> to the current LDFLAGS.
638 solar 1.27 append-ldflags() {
639 kevquinn 1.105 [[ -z $* ]] && return 0
640 flameeyes 1.123 local flag
641     for flag in "$@"; do
642     [[ ${flag} == -l* ]] && \
643     ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
644     done
645    
646 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
647 vapier 1.28 return 0
648 solar 1.27 }
649    
650 vapier 1.121 # @FUNCTION: filter-ldflags
651     # @USAGE: <flags>
652     # @DESCRIPTION:
653     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
654 solar 1.41 filter-ldflags() {
655 kevquinn 1.105 _filter-var LDFLAGS "$@"
656 solar 1.41 return 0
657     }
658    
659 vapier 1.121 # @FUNCTION: raw-ldflags
660     # @USAGE: <flags>
661     # @DESCRIPTION:
662 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
663     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
664     # to gcc where it needs the '-Wl,'.
665 vapier 1.102 raw-ldflags() {
666     local x input="$@"
667     [[ -z ${input} ]] && input=${LDFLAGS}
668     set --
669     for x in ${input} ; do
670 vapier 1.103 x=${x#-Wl,}
671     set -- "$@" ${x//,/ }
672 vapier 1.102 done
673     echo "$@"
674     }
675    
676 ssuominen 1.145 # @FUNCTION: no-as-needed
677     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
678     no-as-needed() {
679     case $($(tc-getLD) -v 2>&1 </dev/null) in
680     *GNU*) # GNU ld
681     echo "-Wl,--no-as-needed" ;;
682     esac
683     }
684 vapier 1.113
685     # Some tests for when we screw with things and want to make
686     # sure we didn't break anything
687     #TESTS() {
688     # CFLAGS="-a -b -c=1"
689     # CXXFLAGS="-x -y -z=2"
690     # LDFLAGS="-l -m -n=3"
691     #
692     # die() { exit 1; }
693     # (is-flag 1 2 3) && die
694     # (is-ldflag 1 2 3) && die
695     #
696     # is-flagq -l && die
697     # is-ldflagq -a && die
698     # is-flagq -a || die
699     # is-flagq -x || die
700     # is-ldflagq -n=* || die
701     # is-ldflagq -n && die
702     #
703     # strip-unsupported-flags
704     # [[ ${CFLAGS} == "-c=1" ]] || die
705     # [[ ${CXXFLAGS} == "-y -z=2" ]] || die
706     #
707     # echo "All tests pass"
708     #}
709     #TESTS

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