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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 1.163 2011/12/28 06:28:55 dirtyepic Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.175 2012/06/05 02:16:40 dirtyepic 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"
52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \ 44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \ 45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \ 46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \ 47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*" 48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi=* \
49 -D* -U*"
58 50
59 # 4.5 51 # 4.5
60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp" 52 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
61 # 4.6 53 # 4.6
62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm" 54 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
55 # 4.7
56 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
63 57
64 export ALLOWED_FLAGS 58 export ALLOWED_FLAGS
65 return 0 59 return 0
66} 60}
67 61
92 86
93# Remove occurrences of strings from variable given in $1 87# Remove occurrences of strings from variable given in $1
94# Strings removed are matched as globs, so for example 88# Strings removed are matched as globs, so for example
95# '-O*' would remove -O1, -O2 etc. 89# '-O*' would remove -O1, -O2 etc.
96_filter-var() { 90_filter-var() {
97 local f x VAR VAL 91 local f x var=$1 new=()
98 declare -a new
99
100 VAR=$1
101 shift 92 shift
102 eval VAL=\${${VAR}} 93
103 for f in ${VAL}; do 94 for f in ${!var} ; do
104 for x in "$@"; do 95 for x in "$@" ; do
105 # Note this should work with globs like -O* 96 # Note this should work with globs like -O*
106 [[ ${f} == ${x} ]] && continue 2 97 [[ ${f} == ${x} ]] && continue 2
107 done 98 done
108 eval new\[\${\#new\[@]}]=\${f} 99 new+=( "${f}" )
109 done 100 done
110 eval export ${VAR}=\${new\[*]} 101 eval export ${var}=\""${new[*]}"\"
111} 102}
112 103
113# @FUNCTION: filter-flags 104# @FUNCTION: filter-flags
114# @USAGE: <flags> 105# @USAGE: <flags>
115# @DESCRIPTION: 106# @DESCRIPTION:
116# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs. 107# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
117filter-flags() { 108filter-flags() {
118 _filter-hardened "$@" 109 _filter-hardened "$@"
110 local v
111 for v in $(all-flag-vars) ; do
119 _filter-var CFLAGS "$@" 112 _filter-var ${v} "$@"
120 _filter-var CPPFLAGS "$@" 113 done
121 _filter-var CXXFLAGS "$@"
122 _filter-var FFLAGS "$@"
123 _filter-var FCFLAGS "$@"
124 return 0 114 return 0
125} 115}
126 116
127# @FUNCTION: filter-lfs-flags 117# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION: 118# @DESCRIPTION:
134 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...) 124 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
135 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t) 125 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
136 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
137} 127}
138 128
129# @FUNCTION: filter-ldflags
130# @USAGE: <flags>
131# @DESCRIPTION:
132# Remove particular <flags> from LDFLAGS. Accepts shell globs.
133filter-ldflags() {
134 _filter-var LDFLAGS "$@"
135 return 0
136}
137
139# @FUNCTION: append-cppflags 138# @FUNCTION: append-cppflags
140# @USAGE: <flags> 139# @USAGE: <flags>
141# @DESCRIPTION: 140# @DESCRIPTION:
142# Add extra <flags> to the current CPPFLAGS. 141# Add extra <flags> to the current CPPFLAGS.
143append-cppflags() { 142append-cppflags() {
184 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments" 183 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
185 # see comments in filter-lfs-flags func for meaning of these 184 # see comments in filter-lfs-flags func for meaning of these
186 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 185 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
187} 186}
188 187
188# @FUNCTION: append-ldflags
189# @USAGE: <flags>
190# @DESCRIPTION:
191# Add extra <flags> to the current LDFLAGS.
192append-ldflags() {
193 [[ $# -eq 0 ]] && return 0
194 local flag
195 for flag in "$@"; do
196 [[ ${flag} == -l* ]] && \
197 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
198 done
199
200 export LDFLAGS="${LDFLAGS} $*"
201 return 0
202}
203
189# @FUNCTION: append-flags 204# @FUNCTION: append-flags
190# @USAGE: <flags> 205# @USAGE: <flags>
191# @DESCRIPTION: 206# @DESCRIPTION:
192# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 207# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
193append-flags() { 208append-flags() {
194 [[ $# -eq 0 ]] && return 0 209 [[ $# -eq 0 ]] && return 0
210 case " $* " in
211 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
212 *' '-L*|\
213 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
214 esac
195 append-cflags "$@" 215 append-cflags "$@"
196 append-cxxflags "$@" 216 append-cxxflags "$@"
197 append-fflags "$@" 217 append-fflags "$@"
198 return 0 218 return 0
199} 219}
201# @FUNCTION: replace-flags 221# @FUNCTION: replace-flags
202# @USAGE: <old> <new> 222# @USAGE: <old> <new>
203# @DESCRIPTION: 223# @DESCRIPTION:
204# Replace the <old> flag with <new>. Accepts shell globs for <old>. 224# Replace the <old> flag with <new>. Accepts shell globs for <old>.
205replace-flags() { 225replace-flags() {
206 [[ $# != 2 ]] \
207 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 226 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
208 && die "replace-flags takes 2 arguments, not $#"
209 227
210 local f fset 228 local f var new
211 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 229 for var in $(all-flag-vars) ; do
212
213 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
214 # Looping over the flags instead of using a global 230 # Looping over the flags instead of using a global
215 # substitution ensures that we're working with flag atoms. 231 # substitution ensures that we're working with flag atoms.
216 # Otherwise globs like -O* have the potential to wipe out the 232 # Otherwise globs like -O* have the potential to wipe out the
217 # list of flags. 233 # list of flags.
234 new=()
218 for f in ${!fset}; do 235 for f in ${!var} ; do
219 # Note this should work with globs like -O* 236 # Note this should work with globs like -O*
220 [[ ${f} == ${1} ]] && f=${2} 237 [[ ${f} == ${1} ]] && f=${2}
221 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 238 new+=( "${f}" )
222 done 239 done
223 eval export ${fset}=\${new_${fset}\[*]} 240 eval export ${var}=\""${new[*]}"\"
224 done 241 done
225 242
226 return 0 243 return 0
227} 244}
228 245
256# @USAGE: <flag> 273# @USAGE: <flag>
257# @DESCRIPTION: 274# @DESCRIPTION:
258# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. 275# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
259is-flagq() { 276is-flagq() {
260 [[ -n $2 ]] && die "Usage: is-flag <flag>" 277 [[ -n $2 ]] && die "Usage: is-flag <flag>"
261 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1 278
279 local var
280 for var in $(all-flag-vars) ; do
281 _is_flagq ${var} "$1" && return 0
282 done
283 return 1
262} 284}
263 285
264# @FUNCTION: is-flag 286# @FUNCTION: is-flag
265# @USAGE: <flag> 287# @USAGE: <flag>
266# @DESCRIPTION: 288# @DESCRIPTION:
322 344
323# @FUNCTION: strip-flags 345# @FUNCTION: strip-flags
324# @DESCRIPTION: 346# @DESCRIPTION:
325# Strip C[XX]FLAGS of everything except known good/safe flags. 347# Strip C[XX]FLAGS of everything except known good/safe flags.
326strip-flags() { 348strip-flags() {
327 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 349 local x y var
328 350
329 setup-allowed-flags 351 setup-allowed-flags
330 352
331 local NEW_CFLAGS=""
332 local NEW_CXXFLAGS=""
333 local NEW_FFLAGS=""
334 local NEW_FCFLAGS=""
335
336 set -f # disable pathname expansion 353 set -f # disable pathname expansion
337 354
338 for x in ${CFLAGS}; do 355 for var in $(all-flag-vars) ; do
356 local new=()
357
358 for x in ${!var} ; do
359 local flag=${x%%=*}
339 for y in ${ALLOWED_FLAGS}; do 360 for y in ${ALLOWED_FLAGS} ; do
340 flag=${x%%=*}
341 if [ "${flag%%${y}}" = "" ] ; then 361 if [[ -z ${flag%%${y}} ]] ; then
342 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 362 new+=( "${x}" )
343 break 363 break
344 fi 364 fi
345 done 365 done
346 done 366 done
347 367
348 for x in ${CXXFLAGS}; do
349 for y in ${ALLOWED_FLAGS}; do
350 flag=${x%%=*}
351 if [ "${flag%%${y}}" = "" ] ; then
352 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
353 break
354 fi
355 done
356 done
357
358 for x in ${FFLAGS}; do
359 for y in ${ALLOWED_FLAGS}; do
360 flag=${x%%=*}
361 if [ "${flag%%${y}}" = "" ] ; then
362 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
363 break
364 fi
365 done
366 done
367
368 for x in ${FCFLAGS}; do
369 for y in ${ALLOWED_FLAGS}; do
370 flag=${x%%=*}
371 if [ "${flag%%${y}}" = "" ] ; then
372 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
373 break
374 fi
375 done
376 done
377
378 # In case we filtered out all optimization flags fallback to -O2 368 # In case we filtered out all optimization flags fallback to -O2
379 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 369 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
380 NEW_CFLAGS="${NEW_CFLAGS} -O2" 370 new+=( -O2 )
381 fi 371 fi
382 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 372
383 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 373 eval export ${var}=\""${new[*]}"\"
384 fi 374 done
385 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
386 NEW_FFLAGS="${NEW_FFLAGS} -O2"
387 fi
388 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
389 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
390 fi
391 375
392 set +f # re-enable pathname expansion 376 set +f # re-enable pathname expansion
393 377
394 export CFLAGS="${NEW_CFLAGS}"
395 export CXXFLAGS="${NEW_CXXFLAGS}"
396 export FFLAGS="${NEW_FFLAGS}"
397 export FCFLAGS="${NEW_FCFLAGS}"
398 return 0 378 return 0
399} 379}
400 380
401test-flag-PROG() { 381test-flag-PROG() {
402 local comp=$1 382 local comp=$1
403 local flags="$2" 383 local flag=$2
404 384
405 [[ -z ${comp} || -z ${flags} ]] && return 1 385 [[ -z ${comp} || -z ${flag} ]] && return 1
406 386
407 # use -c so we can test the assembler as well 387 # use -c so we can test the assembler as well
408 local PROG=$(tc-get${comp}) 388 local PROG=$(tc-get${comp})
409 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \ 389 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
410 > /dev/null 2>&1 390 > /dev/null 2>&1
411} 391}
412 392
413# @FUNCTION: test-flag-CC 393# @FUNCTION: test-flag-CC
414# @USAGE: <flag> 394# @USAGE: <flag>
510# @FUNCTION: get-flag 490# @FUNCTION: get-flag
511# @USAGE: <flag> 491# @USAGE: <flag>
512# @DESCRIPTION: 492# @DESCRIPTION:
513# Find and echo the value for a particular flag. Accepts shell globs. 493# Find and echo the value for a particular flag. Accepts shell globs.
514get-flag() { 494get-flag() {
515 local f findflag="$1" 495 local f var findflag="$1"
516 496
517 # this code looks a little flaky but seems to work for 497 # this code looks a little flaky but seems to work for
518 # everything we want ... 498 # everything we want ...
519 # for example, if CFLAGS="-march=i686": 499 # for example, if CFLAGS="-march=i686":
520 # `get-flag -march` == "-march=i686" 500 # `get-flag -march` == "-march=i686"
521 # `get-flag march` == "i686" 501 # `get-flag march` == "i686"
522 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 502 for var in $(all-flag-vars) ; do
503 for f in ${!var} ; do
523 if [ "${f/${findflag}}" != "${f}" ] ; then 504 if [ "${f/${findflag}}" != "${f}" ] ; then
524 printf "%s\n" "${f/-${findflag}=}" 505 printf "%s\n" "${f/-${findflag}=}"
525 return 0 506 return 0
526 fi 507 fi
508 done
527 done 509 done
528 return 1 510 return 1
529} 511}
530
531# DEAD FUNCS. Remove by Dec 2011.
532test_flag() { die "$0: deprecated, please use test-flags()!" ; }
533has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
534has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
535has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
536has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
537has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
538 512
539# @FUNCTION: has_m64 513# @FUNCTION: has_m64
540# @DESCRIPTION: 514# @DESCRIPTION:
541# This doesn't test if the flag is accepted, it tests if the flag actually 515# This doesn't test if the flag is accepted, it tests if the flag actually
542# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 516# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
543# return code is 0, else the return code is 1. 517# return code is 0, else the return code is 1.
544has_m64() { 518has_m64() {
519 eqawarn "${FUNCNAME}: don't use this anymore"
520
545 # this doesnt test if the flag is accepted, it tests if the flag 521 # this doesnt test if the flag is accepted, it tests if the flag
546 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 522 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
547 # please dont replace this function with test_flag in some future 523 # please dont replace this function with test_flag in some future
548 # clean-up! 524 # clean-up!
549 525
555 rm -f "${temp}".c 531 rm -f "${temp}".c
556 [[ ${ret} != 1 ]] && return 0 532 [[ ${ret} != 1 ]] && return 0
557 return 1 533 return 1
558} 534}
559 535
560# @FUNCTION: has_m32
561# @DESCRIPTION:
562# This doesn't test if the flag is accepted, it tests if the flag actually
563# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
564# code is 0, else return code is 1.
565has_m32() { 536has_m32() {
566 # this doesnt test if the flag is accepted, it tests if the flag 537 die "${FUNCNAME}: don't use this anymore"
567 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
568 # please dont replace this function with test_flag in some future
569 # clean-up!
570
571 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
572
573 local temp=$(emktemp)
574 echo "int main() { return(0); }" > "${temp}".c
575 MY_CC=$(tc-getCC)
576 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
577 local ret=$?
578 rm -f "${temp}".c
579 [[ ${ret} != 1 ]] && return 0
580 return 1
581} 538}
582 539
583# @FUNCTION: replace-sparc64-flags 540# @FUNCTION: replace-sparc64-flags
584# @DESCRIPTION: 541# @DESCRIPTION:
585# Sets mcpu to v8 and uses the original value as mtune if none specified. 542# Sets mcpu to v8 and uses the original value as mtune if none specified.
619 for flag in "$@"; do 576 for flag in "$@"; do
620 [[ ${flag} == -l* ]] && flag=${flag#-l} 577 [[ ${flag} == -l* ]] && flag=${flag#-l}
621 export LIBS="${LIBS} -l${flag}" 578 export LIBS="${LIBS} -l${flag}"
622 done 579 done
623 580
624 return 0
625}
626
627# @FUNCTION: append-ldflags
628# @USAGE: <flags>
629# @DESCRIPTION:
630# Add extra <flags> to the current LDFLAGS.
631append-ldflags() {
632 [[ $# -eq 0 ]] && return 0
633 local flag
634 for flag in "$@"; do
635 [[ ${flag} == -l* ]] && \
636 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
637 done
638
639 export LDFLAGS="${LDFLAGS} $*"
640 return 0
641}
642
643# @FUNCTION: filter-ldflags
644# @USAGE: <flags>
645# @DESCRIPTION:
646# Remove particular <flags> from LDFLAGS. Accepts shell globs.
647filter-ldflags() {
648 _filter-var LDFLAGS "$@"
649 return 0 581 return 0
650} 582}
651 583
652# @FUNCTION: raw-ldflags 584# @FUNCTION: raw-ldflags
653# @USAGE: [flags] 585# @USAGE: [flags]

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