/[gentoo-x86]/eclass/flag-o-matic.eclass
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1# Copyright 1999-2011 Gentoo Foundation 1# Copyright 1999-2012 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.164 2012/01/13 22:40:29 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.173 2012/05/31 00:29:06 vapier Exp $
4 4
5# @ECLASS: flag-o-matic.eclass 5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER: 6# @MAINTAINER:
7# toolchain@gentoo.org 7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags 8# @BLURB: common functions to manipulate and query toolchain flags
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank" 14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15 15
16inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
17 17
18################ DEPRECATED functions ################ 18# Return all the flag variables that our high level funcs operate on.
19# The following are still present to avoid breaking existing 19all-flag-vars() {
20# code more than necessary; however they are deprecated. Please 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
21# use gcc-specs-* from toolchain-funcs.eclass instead, if you 21}
22# need to know which hardened techs are active in the compiler.
23# See bug #100974
24#
25# has_hardened
26# has_pie
27# has_pic
28# has_ssp_all
29# has_ssp
30
31 22
32# {C,CXX,F,FC}FLAGS that we allow in strip-flags 23# {C,CXX,F,FC}FLAGS that we allow in strip-flags
33# Note: shell globs and character lists are allowed 24# Note: shell globs and character lists are allowed
34setup-allowed-flags() { 25setup-allowed-flags() {
35 ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
92 83
93# Remove occurrences of strings from variable given in $1 84# Remove occurrences of strings from variable given in $1
94# Strings removed are matched as globs, so for example 85# Strings removed are matched as globs, so for example
95# '-O*' would remove -O1, -O2 etc. 86# '-O*' would remove -O1, -O2 etc.
96_filter-var() { 87_filter-var() {
97 local f x VAR VAL 88 local f x var=$1 new=()
98 declare -a new
99
100 VAR=$1
101 shift 89 shift
102 eval VAL=\${${VAR}} 90
103 for f in ${VAL}; do 91 for f in ${!var} ; do
104 for x in "$@"; do 92 for x in "$@" ; do
105 # Note this should work with globs like -O* 93 # Note this should work with globs like -O*
106 [[ ${f} == ${x} ]] && continue 2 94 [[ ${f} == ${x} ]] && continue 2
107 done 95 done
108 eval new\[\${\#new\[@]}]=\${f} 96 new+=( "${f}" )
109 done 97 done
110 eval export ${VAR}=\${new\[*]} 98 eval export ${var}=\""${new[*]}"\"
111} 99}
112 100
113# @FUNCTION: filter-flags 101# @FUNCTION: filter-flags
114# @USAGE: <flags> 102# @USAGE: <flags>
115# @DESCRIPTION: 103# @DESCRIPTION:
116# Remove particular <flags> from {C,CPP,CXX,F,FC,LD}FLAGS. Accepts shell globs. 104# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
117filter-flags() { 105filter-flags() {
118 _filter-hardened "$@" 106 _filter-hardened "$@"
119 local v 107 local v
120 for v in C CPP CXX F FC LD ; do 108 for v in $(all-flag-vars) ; do
121 _filter-var ${v}FLAGS "$@" 109 _filter-var ${v} "$@"
122 done 110 done
123 return 0 111 return 0
124} 112}
125 113
126# @FUNCTION: filter-lfs-flags 114# @FUNCTION: filter-lfs-flags
133 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...) 121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
134 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t) 122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 124}
137 125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
133}
134
138# @FUNCTION: append-cppflags 135# @FUNCTION: append-cppflags
139# @USAGE: <flags> 136# @USAGE: <flags>
140# @DESCRIPTION: 137# @DESCRIPTION:
141# Add extra <flags> to the current CPPFLAGS. 138# Add extra <flags> to the current CPPFLAGS.
142append-cppflags() { 139append-cppflags() {
183 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments" 180 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
184 # see comments in filter-lfs-flags func for meaning of these 181 # see comments in filter-lfs-flags func for meaning of these
185 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 182 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
186} 183}
187 184
185# @FUNCTION: append-ldflags
186# @USAGE: <flags>
187# @DESCRIPTION:
188# Add extra <flags> to the current LDFLAGS.
189append-ldflags() {
190 [[ $# -eq 0 ]] && return 0
191 local flag
192 for flag in "$@"; do
193 [[ ${flag} == -l* ]] && \
194 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
195 done
196
197 export LDFLAGS="${LDFLAGS} $*"
198 return 0
199}
200
188# @FUNCTION: append-flags 201# @FUNCTION: append-flags
189# @USAGE: <flags> 202# @USAGE: <flags>
190# @DESCRIPTION: 203# @DESCRIPTION:
191# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
192append-flags() { 205append-flags() {
193 [[ $# -eq 0 ]] && return 0 206 [[ $# -eq 0 ]] && return 0
207 case " $* " in
208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
209 *' '-L*|\
210 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
211 esac
194 append-cflags "$@" 212 append-cflags "$@"
195 append-cxxflags "$@" 213 append-cxxflags "$@"
196 append-fflags "$@" 214 append-fflags "$@"
197 return 0 215 return 0
198} 216}
200# @FUNCTION: replace-flags 218# @FUNCTION: replace-flags
201# @USAGE: <old> <new> 219# @USAGE: <old> <new>
202# @DESCRIPTION: 220# @DESCRIPTION:
203# Replace the <old> flag with <new>. Accepts shell globs for <old>. 221# Replace the <old> flag with <new>. Accepts shell globs for <old>.
204replace-flags() { 222replace-flags() {
205 [[ $# != 2 ]] \
206 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 223 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
207 && die "replace-flags takes 2 arguments, not $#"
208 224
209 local f fset 225 local f var new
210 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 226 for var in $(all-flag-vars) ; do
211
212 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
213 # Looping over the flags instead of using a global 227 # Looping over the flags instead of using a global
214 # substitution ensures that we're working with flag atoms. 228 # substitution ensures that we're working with flag atoms.
215 # Otherwise globs like -O* have the potential to wipe out the 229 # Otherwise globs like -O* have the potential to wipe out the
216 # list of flags. 230 # list of flags.
231 new=()
217 for f in ${!fset}; do 232 for f in ${!var} ; do
218 # Note this should work with globs like -O* 233 # Note this should work with globs like -O*
219 [[ ${f} == ${1} ]] && f=${2} 234 [[ ${f} == ${1} ]] && f=${2}
220 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 235 new+=( "${f}" )
221 done 236 done
222 eval export ${fset}=\${new_${fset}\[*]} 237 eval export ${var}=\""${new[*]}"\"
223 done 238 done
224 239
225 return 0 240 return 0
226} 241}
227 242
255# @USAGE: <flag> 270# @USAGE: <flag>
256# @DESCRIPTION: 271# @DESCRIPTION:
257# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. 272# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
258is-flagq() { 273is-flagq() {
259 [[ -n $2 ]] && die "Usage: is-flag <flag>" 274 [[ -n $2 ]] && die "Usage: is-flag <flag>"
260 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1 275
276 local var
277 for var in $(all-flag-vars) ; do
278 _is_flagq ${var} "$1" && return 0
279 done
280 return 1
261} 281}
262 282
263# @FUNCTION: is-flag 283# @FUNCTION: is-flag
264# @USAGE: <flag> 284# @USAGE: <flag>
265# @DESCRIPTION: 285# @DESCRIPTION:
321 341
322# @FUNCTION: strip-flags 342# @FUNCTION: strip-flags
323# @DESCRIPTION: 343# @DESCRIPTION:
324# Strip C[XX]FLAGS of everything except known good/safe flags. 344# Strip C[XX]FLAGS of everything except known good/safe flags.
325strip-flags() { 345strip-flags() {
326 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 346 local x y var
327 347
328 setup-allowed-flags 348 setup-allowed-flags
329 349
330 local NEW_CFLAGS=""
331 local NEW_CXXFLAGS=""
332 local NEW_FFLAGS=""
333 local NEW_FCFLAGS=""
334
335 set -f # disable pathname expansion 350 set -f # disable pathname expansion
336 351
337 for x in ${CFLAGS}; do 352 for var in $(all-flag-vars) ; do
353 local new=()
354
355 for x in ${!var} ; do
356 local flag=${x%%=*}
338 for y in ${ALLOWED_FLAGS}; do 357 for y in ${ALLOWED_FLAGS} ; do
339 flag=${x%%=*}
340 if [ "${flag%%${y}}" = "" ] ; then 358 if [[ -z ${flag%%${y}} ]] ; then
341 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 359 new+=( "${x}" )
342 break 360 break
343 fi 361 fi
344 done 362 done
345 done 363 done
346 364
347 for x in ${CXXFLAGS}; do
348 for y in ${ALLOWED_FLAGS}; do
349 flag=${x%%=*}
350 if [ "${flag%%${y}}" = "" ] ; then
351 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
352 break
353 fi
354 done
355 done
356
357 for x in ${FFLAGS}; do
358 for y in ${ALLOWED_FLAGS}; do
359 flag=${x%%=*}
360 if [ "${flag%%${y}}" = "" ] ; then
361 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
362 break
363 fi
364 done
365 done
366
367 for x in ${FCFLAGS}; do
368 for y in ${ALLOWED_FLAGS}; do
369 flag=${x%%=*}
370 if [ "${flag%%${y}}" = "" ] ; then
371 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
372 break
373 fi
374 done
375 done
376
377 # In case we filtered out all optimization flags fallback to -O2 365 # In case we filtered out all optimization flags fallback to -O2
378 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 366 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
379 NEW_CFLAGS="${NEW_CFLAGS} -O2" 367 new+=( -O2 )
380 fi 368 fi
381 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 369
382 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 370 eval export ${var}=\""${new[*]}"\"
383 fi 371 done
384 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
385 NEW_FFLAGS="${NEW_FFLAGS} -O2"
386 fi
387 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
388 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
389 fi
390 372
391 set +f # re-enable pathname expansion 373 set +f # re-enable pathname expansion
392 374
393 export CFLAGS="${NEW_CFLAGS}"
394 export CXXFLAGS="${NEW_CXXFLAGS}"
395 export FFLAGS="${NEW_FFLAGS}"
396 export FCFLAGS="${NEW_FCFLAGS}"
397 return 0 375 return 0
398} 376}
399 377
400test-flag-PROG() { 378test-flag-PROG() {
401 local comp=$1 379 local comp=$1
402 local flags="$2" 380 local flag=$2
403 381
404 [[ -z ${comp} || -z ${flags} ]] && return 1 382 [[ -z ${comp} || -z ${flag} ]] && return 1
405 383
406 # use -c so we can test the assembler as well 384 # use -c so we can test the assembler as well
407 local PROG=$(tc-get${comp}) 385 local PROG=$(tc-get${comp})
408 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \ 386 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
409 > /dev/null 2>&1 387 > /dev/null 2>&1
410} 388}
411 389
412# @FUNCTION: test-flag-CC 390# @FUNCTION: test-flag-CC
413# @USAGE: <flag> 391# @USAGE: <flag>
509# @FUNCTION: get-flag 487# @FUNCTION: get-flag
510# @USAGE: <flag> 488# @USAGE: <flag>
511# @DESCRIPTION: 489# @DESCRIPTION:
512# Find and echo the value for a particular flag. Accepts shell globs. 490# Find and echo the value for a particular flag. Accepts shell globs.
513get-flag() { 491get-flag() {
514 local f findflag="$1" 492 local f var findflag="$1"
515 493
516 # this code looks a little flaky but seems to work for 494 # this code looks a little flaky but seems to work for
517 # everything we want ... 495 # everything we want ...
518 # for example, if CFLAGS="-march=i686": 496 # for example, if CFLAGS="-march=i686":
519 # `get-flag -march` == "-march=i686" 497 # `get-flag -march` == "-march=i686"
520 # `get-flag march` == "i686" 498 # `get-flag march` == "i686"
521 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 499 for var in $(all-flag-vars) ; do
500 for f in ${!var} ; do
522 if [ "${f/${findflag}}" != "${f}" ] ; then 501 if [ "${f/${findflag}}" != "${f}" ] ; then
523 printf "%s\n" "${f/-${findflag}=}" 502 printf "%s\n" "${f/-${findflag}=}"
524 return 0 503 return 0
525 fi 504 fi
505 done
526 done 506 done
527 return 1 507 return 1
528} 508}
529
530# DEAD FUNCS. Remove by Dec 2011.
531test_flag() { die "$0: deprecated, please use test-flags()!" ; }
532has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
533has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
534has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
535has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
536has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
537 509
538# @FUNCTION: has_m64 510# @FUNCTION: has_m64
539# @DESCRIPTION: 511# @DESCRIPTION:
540# This doesn't test if the flag is accepted, it tests if the flag actually 512# This doesn't test if the flag is accepted, it tests if the flag actually
541# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 513# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
542# return code is 0, else the return code is 1. 514# return code is 0, else the return code is 1.
543has_m64() { 515has_m64() {
516 eqawarn "${FUNCNAME}: don't use this anymore"
517
544 # this doesnt test if the flag is accepted, it tests if the flag 518 # this doesnt test if the flag is accepted, it tests if the flag
545 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 519 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
546 # please dont replace this function with test_flag in some future 520 # please dont replace this function with test_flag in some future
547 # clean-up! 521 # clean-up!
548 522
554 rm -f "${temp}".c 528 rm -f "${temp}".c
555 [[ ${ret} != 1 ]] && return 0 529 [[ ${ret} != 1 ]] && return 0
556 return 1 530 return 1
557} 531}
558 532
559# @FUNCTION: has_m32
560# @DESCRIPTION:
561# This doesn't test if the flag is accepted, it tests if the flag actually
562# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
563# code is 0, else return code is 1.
564has_m32() { 533has_m32() {
565 # this doesnt test if the flag is accepted, it tests if the flag 534 die "${FUNCNAME}: don't use this anymore"
566 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
567 # please dont replace this function with test_flag in some future
568 # clean-up!
569
570 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
571
572 local temp=$(emktemp)
573 echo "int main() { return(0); }" > "${temp}".c
574 MY_CC=$(tc-getCC)
575 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
576 local ret=$?
577 rm -f "${temp}".c
578 [[ ${ret} != 1 ]] && return 0
579 return 1
580} 535}
581 536
582# @FUNCTION: replace-sparc64-flags 537# @FUNCTION: replace-sparc64-flags
583# @DESCRIPTION: 538# @DESCRIPTION:
584# Sets mcpu to v8 and uses the original value as mtune if none specified. 539# Sets mcpu to v8 and uses the original value as mtune if none specified.
618 for flag in "$@"; do 573 for flag in "$@"; do
619 [[ ${flag} == -l* ]] && flag=${flag#-l} 574 [[ ${flag} == -l* ]] && flag=${flag#-l}
620 export LIBS="${LIBS} -l${flag}" 575 export LIBS="${LIBS} -l${flag}"
621 done 576 done
622 577
623 return 0
624}
625
626# @FUNCTION: append-ldflags
627# @USAGE: <flags>
628# @DESCRIPTION:
629# Add extra <flags> to the current LDFLAGS.
630append-ldflags() {
631 [[ $# -eq 0 ]] && return 0
632 local flag
633 for flag in "$@"; do
634 [[ ${flag} == -l* ]] && \
635 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
636 done
637
638 export LDFLAGS="${LDFLAGS} $*"
639 return 0
640}
641
642# @FUNCTION: filter-ldflags
643# @USAGE: <flags>
644# @DESCRIPTION:
645# Remove particular <flags> from LDFLAGS. Accepts shell globs.
646filter-ldflags() {
647 _filter-var LDFLAGS "$@"
648 return 0 578 return 0
649} 579}
650 580
651# @FUNCTION: raw-ldflags 581# @FUNCTION: raw-ldflags
652# @USAGE: [flags] 582# @USAGE: [flags]

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