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Revision 1.160 - (hide annotations) (download)
Sat Dec 10 20:03:17 2011 UTC (2 years, 11 months ago) by vapier
Branch: MAIN
Changes since 1.159: +6 -1 lines
avoid multiple inclusions when possible to speed caching up

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 1.160 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.159 2011/12/07 06:42:40 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 kevquinn 1.92 ################ DEPRECATED functions ################
19     # The following are still present to avoid breaking existing
20     # code more than necessary; however they are deprecated. Please
21     # use gcc-specs-* from toolchain-funcs.eclass instead, if you
22     # need to know which hardened techs are active in the compiler.
23     # See bug #100974
24     #
25 vapier 1.121 # has_hardened
26     # has_pie
27     # has_pic
28     # has_ssp_all
29     # has_ssp
30    
31 verwilst 1.3
32 dberkholz 1.124 # {C,CXX,F,FC}FLAGS that we allow in strip-flags
33 vapier 1.117 # Note: shell globs and character lists are allowed
34 vapier 1.36 setup-allowed-flags() {
35 vapier 1.84 if [[ -z ${ALLOWED_FLAGS} ]] ; then
36 vapier 1.76 export ALLOWED_FLAGS="-pipe"
37     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
38 vapier 1.87 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
39 solar 1.127 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
40 kevquinn 1.105 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
41 vapier 1.117 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
42 dirtyepic 1.150 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
43 dberkholz 1.120 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
44 vapier 1.44 fi
45 vapier 1.65 # allow a bunch of flags that negate features / control ABI
46 vapier 1.119 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
47 vapier 1.135 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
48 vapier 1.87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
49 dirtyepic 1.139 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
50     -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
51     -mno-popcnt -mno-abm \
52 vapier 1.140 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
53 vapier 1.87 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
54 dirtyepic 1.149 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
55 vapier 1.91 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
56 vapier 1.87 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
57 vapier 1.159 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
58 vapier 1.114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
59 solar 1.127 -msecure-plt -m*-toc -D* -U*"
60 vapier 1.135
61 dirtyepic 1.148 # 4.5
62     ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
63 dirtyepic 1.149 # 4.6
64     ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
65     -mno-bmi -mno-tbm"
66 dirtyepic 1.148
67 dberkholz 1.124 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
68 vapier 1.36 # NOTE: currently -Os have issues with gcc3 and K6* arch's
69 vapier 1.106 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
70 vapier 1.36 return 0
71 aliz 1.24 }
72 verwilst 1.13
73 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
74     # the hardened compiler defaults.
75     _filter-hardened() {
76     local f
77     for f in "$@" ; do
78     case "${f}" in
79     # Ideally we should only concern ourselves with PIE flags,
80     # not -fPIC or -fpic, but too many places filter -fPIC without
81     # thinking about -fPIE.
82     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
83     gcc-specs-pie || continue
84     is-flagq -nopie || append-flags -nopie;;
85     -fstack-protector)
86     gcc-specs-ssp || continue
87 gengor 1.131 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
88 kevquinn 1.105 -fstack-protector-all)
89     gcc-specs-ssp-to-all || continue
90 gengor 1.131 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
91 gengor 1.128 -fno-strict-overflow)
92     gcc-specs-nostrict || continue
93 gengor 1.131 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
94 solar 1.27 esac
95     done
96 kevquinn 1.105 }
97    
98     # Remove occurrences of strings from variable given in $1
99     # Strings removed are matched as globs, so for example
100     # '-O*' would remove -O1, -O2 etc.
101     _filter-var() {
102     local f x VAR VAL
103     declare -a new
104 vapier 1.36
105 kevquinn 1.105 VAR=$1
106     shift
107     eval VAL=\${${VAR}}
108     for f in ${VAL}; do
109     for x in "$@"; do
110     # Note this should work with globs like -O*
111     [[ ${f} == ${x} ]] && continue 2
112 agriffis 1.61 done
113 kevquinn 1.105 eval new\[\${\#new\[@]}]=\${f}
114 verwilst 1.1 done
115 kevquinn 1.105 eval export ${VAR}=\${new\[*]}
116     }
117 agriffis 1.61
118 vapier 1.121 # @FUNCTION: filter-flags
119     # @USAGE: <flags>
120     # @DESCRIPTION:
121 dberkholz 1.124 # Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
122 kevquinn 1.105 filter-flags() {
123     _filter-hardened "$@"
124     _filter-var CFLAGS "$@"
125 vapier 1.118 _filter-var CPPFLAGS "$@"
126 kevquinn 1.105 _filter-var CXXFLAGS "$@"
127 dberkholz 1.124 _filter-var FFLAGS "$@"
128     _filter-var FCFLAGS "$@"
129 vapier 1.36 return 0
130 verwilst 1.2 }
131    
132 vapier 1.121 # @FUNCTION: filter-lfs-flags
133     # @DESCRIPTION:
134     # Remove flags that enable Large File Support.
135 vapier 1.40 filter-lfs-flags() {
136 vapier 1.154 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
137 vapier 1.153 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
138     # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
139     # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
140     # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
141 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
142     }
143    
144 vapier 1.121 # @FUNCTION: append-cppflags
145     # @USAGE: <flags>
146     # @DESCRIPTION:
147     # Add extra <flags> to the current CPPFLAGS.
148 vapier 1.118 append-cppflags() {
149 vapier 1.158 [[ $# -eq 0 ]] && return 0
150 vapier 1.118 export CPPFLAGS="${CPPFLAGS} $*"
151     return 0
152     }
153    
154 vapier 1.136 # @FUNCTION: append-cflags
155     # @USAGE: <flags>
156     # @DESCRIPTION:
157     # Add extra <flags> to the current CFLAGS.
158 mr_bones_ 1.137 append-cflags() {
159 vapier 1.158 [[ $# -eq 0 ]] && return 0
160     export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
161 vapier 1.136 return 0
162     }
163    
164 gengor 1.132 # @FUNCTION: append-cxxflags
165     # @USAGE: <flags>
166     # @DESCRIPTION:
167     # Add extra <flags> to the current CXXFLAGS.
168     append-cxxflags() {
169 vapier 1.158 [[ $# -eq 0 ]] && return 0
170     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
171 gengor 1.132 return 0
172     }
173    
174 dberkholz 1.124 # @FUNCTION: append-fflags
175     # @USAGE: <flags>
176     # @DESCRIPTION:
177     # Add extra <flags> to the current {F,FC}FLAGS.
178     append-fflags() {
179 vapier 1.158 [[ $# -eq 0 ]] && return 0
180     export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
181     export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
182 dberkholz 1.124 return 0
183     }
184    
185 vapier 1.121 # @FUNCTION: append-lfs-flags
186     # @DESCRIPTION:
187     # Add flags that enable Large File Support.
188 vapier 1.48 append-lfs-flags() {
189 vapier 1.154 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
190 vapier 1.155 # see comments in filter-lfs-flags func for meaning of these
191 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
192 vapier 1.48 }
193    
194 vapier 1.121 # @FUNCTION: append-flags
195     # @USAGE: <flags>
196     # @DESCRIPTION:
197 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
198 vapier 1.18 append-flags() {
199 vapier 1.158 [[ $# -eq 0 ]] && return 0
200 vapier 1.136 append-cflags "$@"
201 vapier 1.138 append-cxxflags "$@"
202 vapier 1.136 append-fflags "$@"
203 vapier 1.28 return 0
204 verwilst 1.1 }
205    
206 vapier 1.121 # @FUNCTION: replace-flags
207     # @USAGE: <old> <new>
208     # @DESCRIPTION:
209     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
210 vapier 1.18 replace-flags() {
211 vapier 1.93 [[ $# != 2 ]] \
212     && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
213     && die "replace-flags takes 2 arguments, not $#"
214    
215 mr_bones_ 1.83 local f fset
216 dirtyepic 1.125 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
217 agriffis 1.64
218 dberkholz 1.124 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
219 agriffis 1.64 # Looping over the flags instead of using a global
220     # substitution ensures that we're working with flag atoms.
221     # Otherwise globs like -O* have the potential to wipe out the
222     # list of flags.
223     for f in ${!fset}; do
224     # Note this should work with globs like -O*
225     [[ ${f} == ${1} ]] && f=${2}
226     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
227     done
228     eval export ${fset}=\${new_${fset}\[*]}
229     done
230    
231 vapier 1.28 return 0
232 danarmak 1.7 }
233    
234 vapier 1.121 # @FUNCTION: replace-cpu-flags
235     # @USAGE: <old> <new>
236     # @DESCRIPTION:
237     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
238     # with flags that select the <new> cpu. Accepts shell globs for <old>.
239 vapier 1.37 replace-cpu-flags() {
240 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
241     while [ $# -gt 1 ] ; do
242 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
243 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
244 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
245     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
246     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
247     shift
248 vapier 1.37 done
249     return 0
250     }
251    
252 vapier 1.113 _is_flagq() {
253 kevquinn 1.105 local x
254 vapier 1.113 for x in ${!1} ; do
255     [[ ${x} == $2 ]] && return 0
256 kevquinn 1.105 done
257     return 1
258     }
259    
260 vapier 1.121 # @FUNCTION: is-flagq
261     # @USAGE: <flag>
262     # @DESCRIPTION:
263 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
264 vapier 1.113 is-flagq() {
265     [[ -n $2 ]] && die "Usage: is-flag <flag>"
266 dberkholz 1.124 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
267 vapier 1.113 }
268    
269 vapier 1.121 # @FUNCTION: is-flag
270     # @USAGE: <flag>
271     # @DESCRIPTION:
272 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
273 danarmak 1.7 is-flag() {
274 vapier 1.113 is-flagq "$@" && echo true
275 kevquinn 1.105 }
276    
277 vapier 1.121 # @FUNCTION: is-ldflagq
278     # @USAGE: <flag>
279     # @DESCRIPTION:
280     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
281 kevquinn 1.105 is-ldflagq() {
282 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
283     _is_flagq LDFLAGS $1
284 verwilst 1.1 }
285 azarah 1.8
286 vapier 1.121 # @FUNCTION: is-ldflag
287     # @USAGE: <flag>
288     # @DESCRIPTION:
289     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
290 kevquinn 1.105 is-ldflag() {
291 vapier 1.113 is-ldflagq "$@" && echo true
292 kevquinn 1.105 }
293    
294 vapier 1.121 # @FUNCTION: filter-mfpmath
295     # @USAGE: <math types>
296     # @DESCRIPTION:
297     # Remove specified math types from the fpmath flag. For example, if the user
298     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
299     # -mfpmath=386.
300 vapier 1.36 filter-mfpmath() {
301 agriffis 1.58 local orig_mfpmath new_math prune_math
302    
303 vapier 1.36 # save the original -mfpmath flag
304 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
305 vapier 1.36 # get the value of the current -mfpmath flag
306 vapier 1.109 new_math=$(get-flag mfpmath)
307     new_math=" ${new_math//,/ } "
308 vapier 1.36 # figure out which math values are to be removed
309 agriffis 1.58 prune_math=""
310 vapier 1.36 for prune_math in "$@" ; do
311 vapier 1.109 new_math=${new_math/ ${prune_math} / }
312 vapier 1.36 done
313 vapier 1.109 new_math=$(echo ${new_math})
314     new_math=${new_math// /,}
315 vapier 1.36
316 vapier 1.109 if [[ -z ${new_math} ]] ; then
317 vapier 1.36 # if we're removing all user specified math values are
318     # slated for removal, then we just filter the flag
319     filter-flags ${orig_mfpmath}
320     else
321     # if we only want to filter some of the user specified
322     # math values, then we replace the current flag
323     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
324     fi
325     return 0
326     }
327    
328 vapier 1.121 # @FUNCTION: strip-flags
329     # @DESCRIPTION:
330     # Strip C[XX]FLAGS of everything except known good/safe flags.
331 azarah 1.8 strip-flags() {
332 dberkholz 1.124 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
333 agriffis 1.58
334 vapier 1.36 setup-allowed-flags
335    
336 azarah 1.8 local NEW_CFLAGS=""
337     local NEW_CXXFLAGS=""
338 dberkholz 1.124 local NEW_FFLAGS=""
339     local NEW_FCFLAGS=""
340 azarah 1.8
341 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
342 vapier 1.144 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
343 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
344     fi
345    
346 agriffis 1.58 set -f # disable pathname expansion
347 azarah 1.8
348 agriffis 1.58 for x in ${CFLAGS}; do
349     for y in ${ALLOWED_FLAGS}; do
350 lostlogic 1.14 flag=${x%%=*}
351 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
352 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
353     break
354 azarah 1.8 fi
355     done
356     done
357    
358 agriffis 1.58 for x in ${CXXFLAGS}; do
359     for y in ${ALLOWED_FLAGS}; do
360 lostlogic 1.14 flag=${x%%=*}
361 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
362 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
363     break
364 azarah 1.8 fi
365     done
366     done
367 azarah 1.30
368 dberkholz 1.124 for x in ${FFLAGS}; do
369     for y in ${ALLOWED_FLAGS}; do
370     flag=${x%%=*}
371     if [ "${flag%%${y}}" = "" ] ; then
372     NEW_FFLAGS="${NEW_FFLAGS} ${x}"
373     break
374     fi
375     done
376     done
377    
378     for x in ${FCFLAGS}; do
379     for y in ${ALLOWED_FLAGS}; do
380     flag=${x%%=*}
381     if [ "${flag%%${y}}" = "" ] ; then
382     NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
383     break
384     fi
385     done
386     done
387    
388 azarah 1.30 # In case we filtered out all optimization flags fallback to -O2
389     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
390     NEW_CFLAGS="${NEW_CFLAGS} -O2"
391     fi
392     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
393     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
394     fi
395 dberkholz 1.124 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
396     NEW_FFLAGS="${NEW_FFLAGS} -O2"
397     fi
398     if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
399     NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
400     fi
401 azarah 1.8
402 agriffis 1.58 set +f # re-enable pathname expansion
403 azarah 1.8
404     export CFLAGS="${NEW_CFLAGS}"
405     export CXXFLAGS="${NEW_CXXFLAGS}"
406 dberkholz 1.124 export FFLAGS="${NEW_FFLAGS}"
407     export FCFLAGS="${NEW_FCFLAGS}"
408 vapier 1.36 return 0
409 puggy 1.29 }
410    
411 azarah 1.96 test-flag-PROG() {
412     local comp=$1
413     local flags="$2"
414    
415 vapier 1.152 [[ -z ${comp} || -z ${flags} ]] && return 1
416 azarah 1.96
417 vapier 1.152 # use -c so we can test the assembler as well
418 azarah 1.96 local PROG=$(tc-get${comp})
419 vapier 1.152 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
420 azarah 1.96 > /dev/null 2>&1
421     }
422    
423 vapier 1.121 # @FUNCTION: test-flag-CC
424     # @USAGE: <flag>
425     # @DESCRIPTION:
426     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
427 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
428    
429 vapier 1.121 # @FUNCTION: test-flag-CXX
430     # @USAGE: <flag>
431     # @DESCRIPTION:
432     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
433 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
434    
435 dberkholz 1.124 # @FUNCTION: test-flag-F77
436     # @USAGE: <flag>
437     # @DESCRIPTION:
438     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
439     test-flag-F77() { test-flag-PROG "F77" "$1"; }
440    
441     # @FUNCTION: test-flag-FC
442     # @USAGE: <flag>
443     # @DESCRIPTION:
444     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
445     test-flag-FC() { test-flag-PROG "FC" "$1"; }
446    
447 azarah 1.99 test-flags-PROG() {
448     local comp=$1
449     local flags
450 azarah 1.96 local x
451 azarah 1.99
452     shift
453    
454 vapier 1.113 [[ -z ${comp} ]] && return 1
455 swegener 1.101
456 azarah 1.96 for x in "$@" ; do
457 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
458 azarah 1.96 done
459    
460 azarah 1.99 echo "${flags}"
461 azarah 1.96
462 azarah 1.99 # Just bail if we dont have any flags
463     [[ -n ${flags} ]]
464 azarah 1.96 }
465    
466 vapier 1.121 # @FUNCTION: test-flags-CC
467     # @USAGE: <flags>
468     # @DESCRIPTION:
469     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
470 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
471    
472 vapier 1.121 # @FUNCTION: test-flags-CXX
473     # @USAGE: <flags>
474     # @DESCRIPTION:
475     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
476 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
477    
478 dberkholz 1.124 # @FUNCTION: test-flags-F77
479     # @USAGE: <flags>
480     # @DESCRIPTION:
481     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
482     test-flags-F77() { test-flags-PROG "F77" "$@"; }
483    
484     # @FUNCTION: test-flags-FC
485     # @USAGE: <flags>
486     # @DESCRIPTION:
487     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
488     test-flags-FC() { test-flags-PROG "FC" "$@"; }
489    
490 vapier 1.121 # @FUNCTION: test-flags
491     # @USAGE: <flags>
492     # @DESCRIPTION:
493 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
494 azarah 1.100 # its really only present due to the append-flags() abomination.
495 azarah 1.99 test-flags() { test-flags-CC "$@"; }
496    
497 vapier 1.121 # @FUNCTION: test_version_info
498     # @USAGE: <version>
499     # @DESCRIPTION:
500     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
501     # Accepts shell globs.
502 agriffis 1.58 test_version_info() {
503 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
504 agriffis 1.58 return 0
505     else
506     return 1
507     fi
508     }
509    
510 vapier 1.121 # @FUNCTION: strip-unsupported-flags
511     # @DESCRIPTION:
512 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
513 puggy 1.29 strip-unsupported-flags() {
514 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
515     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
516 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
517     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
518 azarah 1.8 }
519    
520 vapier 1.121 # @FUNCTION: get-flag
521     # @USAGE: <flag>
522     # @DESCRIPTION:
523     # Find and echo the value for a particular flag. Accepts shell globs.
524 vapier 1.10 get-flag() {
525 agriffis 1.58 local f findflag="$1"
526    
527 vapier 1.36 # this code looks a little flaky but seems to work for
528     # everything we want ...
529     # for example, if CFLAGS="-march=i686":
530 agriffis 1.58 # `get-flag -march` == "-march=i686"
531     # `get-flag march` == "i686"
532 dberkholz 1.124 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
533 vapier 1.10 if [ "${f/${findflag}}" != "${f}" ] ; then
534 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
535 vapier 1.28 return 0
536 vapier 1.10 fi
537     done
538 vapier 1.28 return 1
539 joker 1.16 }
540    
541 vapier 1.151 # DEAD FUNCS. Remove by Dec 2011.
542     test_flag() { die "$0: deprecated, please use test-flags()!" ; }
543     has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
544     has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
545     has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
546     has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
547     has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
548 tseng 1.42
549 vapier 1.121 # @FUNCTION: has_m64
550     # @DESCRIPTION:
551     # This doesn't test if the flag is accepted, it tests if the flag actually
552     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
553     # return code is 0, else the return code is 1.
554 lv 1.56 has_m64() {
555 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
556     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
557     # please dont replace this function with test_flag in some future
558     # clean-up!
559 swegener 1.101
560 vapier 1.72 local temp="$(emktemp)"
561 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
562 kugelfang 1.74 MY_CC=$(tc-getCC)
563 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
564 vapier 1.72 local ret=$?
565 azarah 1.96 rm -f "${temp}".c
566     [[ ${ret} != 1 ]] && return 0
567 lv 1.62 return 1
568 lv 1.56 }
569    
570 vapier 1.121 # @FUNCTION: has_m32
571     # @DESCRIPTION:
572     # This doesn't test if the flag is accepted, it tests if the flag actually
573     # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
574     # code is 0, else return code is 1.
575 lv 1.56 has_m32() {
576 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
577     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
578     # please dont replace this function with test_flag in some future
579     # clean-up!
580 eradicator 1.80
581     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
582    
583 vapier 1.95 local temp=$(emktemp)
584     echo "int main() { return(0); }" > "${temp}".c
585 kugelfang 1.74 MY_CC=$(tc-getCC)
586 vapier 1.95 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
587 vapier 1.72 local ret=$?
588 vapier 1.95 rm -f "${temp}".c
589 azarah 1.96 [[ ${ret} != 1 ]] && return 0
590 lv 1.62 return 1
591 lv 1.56 }
592    
593 vapier 1.121 # @FUNCTION: replace-sparc64-flags
594     # @DESCRIPTION:
595     # Sets mcpu to v8 and uses the original value as mtune if none specified.
596 vapier 1.18 replace-sparc64-flags() {
597 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
598 joker 1.16
599 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
600 agriffis 1.58 for x in ${SPARC64_CPUS}; do
601 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
602     done
603 mr_bones_ 1.83 else
604 swegener 1.111 for x in ${SPARC64_CPUS}; do
605 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
606     done
607     fi
608 mr_bones_ 1.83
609     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
610 agriffis 1.58 for x in ${SPARC64_CPUS}; do
611 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
612     done
613     else
614 swegener 1.111 for x in ${SPARC64_CPUS}; do
615 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
616     done
617     fi
618 vapier 1.59
619     export CFLAGS CXXFLAGS
620 solar 1.27 }
621    
622 abcd 1.147 # @FUNCTION: append-libs
623     # @USAGE: <libs>
624     # @DESCRIPTION:
625     # Add extra <libs> to the current LIBS.
626     append-libs() {
627 vapier 1.158 [[ $# -eq 0 ]] && return 0
628 abcd 1.147 local flag
629     for flag in "$@"; do
630     [[ ${flag} == -l* ]] && flag=${flag#-l}
631     export LIBS="${LIBS} -l${flag}"
632     done
633    
634     return 0
635     }
636    
637 vapier 1.121 # @FUNCTION: append-ldflags
638     # @USAGE: <flags>
639     # @DESCRIPTION:
640     # Add extra <flags> to the current LDFLAGS.
641 solar 1.27 append-ldflags() {
642 vapier 1.158 [[ $# -eq 0 ]] && return 0
643 flameeyes 1.123 local flag
644     for flag in "$@"; do
645     [[ ${flag} == -l* ]] && \
646     ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
647     done
648    
649 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
650 vapier 1.28 return 0
651 solar 1.27 }
652    
653 vapier 1.121 # @FUNCTION: filter-ldflags
654     # @USAGE: <flags>
655     # @DESCRIPTION:
656     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
657 solar 1.41 filter-ldflags() {
658 kevquinn 1.105 _filter-var LDFLAGS "$@"
659 solar 1.41 return 0
660     }
661    
662 vapier 1.121 # @FUNCTION: raw-ldflags
663 vapier 1.156 # @USAGE: [flags]
664 vapier 1.121 # @DESCRIPTION:
665 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
666     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
667     # to gcc where it needs the '-Wl,'.
668 vapier 1.156 #
669     # If no flags are specified, then default to ${LDFLAGS}.
670 vapier 1.102 raw-ldflags() {
671     local x input="$@"
672     [[ -z ${input} ]] && input=${LDFLAGS}
673     set --
674     for x in ${input} ; do
675 vapier 1.103 x=${x#-Wl,}
676     set -- "$@" ${x//,/ }
677 vapier 1.102 done
678     echo "$@"
679     }
680    
681 ssuominen 1.145 # @FUNCTION: no-as-needed
682     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
683     no-as-needed() {
684     case $($(tc-getLD) -v 2>&1 </dev/null) in
685     *GNU*) # GNU ld
686     echo "-Wl,--no-as-needed" ;;
687     esac
688     }
689 vapier 1.113
690     # Some tests for when we screw with things and want to make
691     # sure we didn't break anything
692     #TESTS() {
693     # CFLAGS="-a -b -c=1"
694     # CXXFLAGS="-x -y -z=2"
695     # LDFLAGS="-l -m -n=3"
696     #
697     # die() { exit 1; }
698     # (is-flag 1 2 3) && die
699     # (is-ldflag 1 2 3) && die
700     #
701     # is-flagq -l && die
702     # is-ldflagq -a && die
703     # is-flagq -a || die
704     # is-flagq -x || die
705     # is-ldflagq -n=* || die
706     # is-ldflagq -n && die
707     #
708     # strip-unsupported-flags
709     # [[ ${CFLAGS} == "-c=1" ]] || die
710     # [[ ${CXXFLAGS} == "-y -z=2" ]] || die
711     #
712     # echo "All tests pass"
713     #}
714     #TESTS
715 vapier 1.160
716     fi

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