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1# Copyright 1999-2009 Gentoo Foundation 1# Copyright 1999-2011 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 1.131 2009/01/08 11:29:06 gengor Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.163 2011/12/28 06:28:55 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
9# @DESCRIPTION: 9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely 10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds. 11# and safely manage toolchain flags in their builds.
12
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
12 15
13inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
14 17
15################ DEPRECATED functions ################ 18################ DEPRECATED functions ################
16# The following are still present to avoid breaking existing 19# The following are still present to avoid breaking existing
27 30
28 31
29# {C,CXX,F,FC}FLAGS that we allow in strip-flags 32# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed 33# Note: shell globs and character lists are allowed
31setup-allowed-flags() { 34setup-allowed-flags() {
32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
33 export ALLOWED_FLAGS="-pipe" 35 ALLOWED_FLAGS="-pipe"
34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 36 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 37 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow" 38 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 39 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 40 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 41 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" 42 ALLOWED_FLAGS+=" -W* -w"
41 fi 43
42 # allow a bunch of flags that negate features / control ABI 44 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 45 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow" 46 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47 -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 48 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 49 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
50 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 51 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \ 53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
54 -msecure-plt -m*-toc -D* -U*"
55 58
56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 59 # 4.5
57 # NOTE: currently -Os have issues with gcc3 and K6* arch's 60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 61 # 4.6
62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
63
64 export ALLOWED_FLAGS
59 return 0 65 return 0
60} 66}
61 67
62# inverted filters for hardened compiler. This is trying to unpick 68# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults. 69# the hardened compiler defaults.
120 126
121# @FUNCTION: filter-lfs-flags 127# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION: 128# @DESCRIPTION:
123# Remove flags that enable Large File Support. 129# Remove flags that enable Large File Support.
124filter-lfs-flags() { 130filter-lfs-flags() {
125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 131 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
132 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
133 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
134 # _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)
126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 136 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127} 137}
128 138
129# @FUNCTION: append-cppflags 139# @FUNCTION: append-cppflags
130# @USAGE: <flags> 140# @USAGE: <flags>
131# @DESCRIPTION: 141# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS. 142# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() { 143append-cppflags() {
134 [[ -z $* ]] && return 0 144 [[ $# -eq 0 ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*" 145 export CPPFLAGS="${CPPFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-cflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current CFLAGS.
153append-cflags() {
154 [[ $# -eq 0 ]] && return 0
155 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
156 return 0
157}
158
159# @FUNCTION: append-cxxflags
160# @USAGE: <flags>
161# @DESCRIPTION:
162# Add extra <flags> to the current CXXFLAGS.
163append-cxxflags() {
164 [[ $# -eq 0 ]] && return 0
165 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
136 return 0 166 return 0
137} 167}
138 168
139# @FUNCTION: append-fflags 169# @FUNCTION: append-fflags
140# @USAGE: <flags> 170# @USAGE: <flags>
141# @DESCRIPTION: 171# @DESCRIPTION:
142# Add extra <flags> to the current {F,FC}FLAGS. 172# Add extra <flags> to the current {F,FC}FLAGS.
143append-fflags() { 173append-fflags() {
144 [[ -z $* ]] && return 0 174 [[ $# -eq 0 ]] && return 0
145 export FFLAGS="${FFLAGS} $*" 175 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
146 export FCFLAGS="${FCFLAGS} $*" 176 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
147 return 0 177 return 0
148} 178}
149 179
150# @FUNCTION: append-lfs-flags 180# @FUNCTION: append-lfs-flags
151# @DESCRIPTION: 181# @DESCRIPTION:
152# Add flags that enable Large File Support. 182# Add flags that enable Large File Support.
153append-lfs-flags() { 183append-lfs-flags() {
154 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 184 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
185 # see comments in filter-lfs-flags func for meaning of these
155 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 186 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
156} 187}
157 188
158# @FUNCTION: append-flags 189# @FUNCTION: append-flags
159# @USAGE: <flags> 190# @USAGE: <flags>
160# @DESCRIPTION: 191# @DESCRIPTION:
161# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 192# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
162append-flags() { 193append-flags() {
163 [[ -z $* ]] && return 0 194 [[ $# -eq 0 ]] && return 0
164 export CFLAGS="${CFLAGS} $*" 195 append-cflags "$@"
165 export CXXFLAGS="${CXXFLAGS} $*" 196 append-cxxflags "$@"
166 export FFLAGS="${FFLAGS} $*" 197 append-fflags "$@"
167 export FCFLAGS="${FCFLAGS} $*"
168 return 0 198 return 0
169} 199}
170 200
171# @FUNCTION: replace-flags 201# @FUNCTION: replace-flags
172# @USAGE: <old> <new> 202# @USAGE: <old> <new>
301 local NEW_CFLAGS="" 331 local NEW_CFLAGS=""
302 local NEW_CXXFLAGS="" 332 local NEW_CXXFLAGS=""
303 local NEW_FFLAGS="" 333 local NEW_FFLAGS=""
304 local NEW_FCFLAGS="" 334 local NEW_FCFLAGS=""
305 335
306 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
307 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
308 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
309 fi
310
311 set -f # disable pathname expansion 336 set -f # disable pathname expansion
312 337
313 for x in ${CFLAGS}; do 338 for x in ${CFLAGS}; do
314 for y in ${ALLOWED_FLAGS}; do 339 for y in ${ALLOWED_FLAGS}; do
315 flag=${x%%=*} 340 flag=${x%%=*}
375 400
376test-flag-PROG() { 401test-flag-PROG() {
377 local comp=$1 402 local comp=$1
378 local flags="$2" 403 local flags="$2"
379 404
380 [[ -z ${comp} || -z ${flags} ]] && \ 405 [[ -z ${comp} || -z ${flags} ]] && return 1
381 return 1
382 406
407 # use -c so we can test the assembler as well
383 local PROG=$(tc-get${comp}) 408 local PROG=$(tc-get${comp})
384 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 409 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
385 > /dev/null 2>&1 410 > /dev/null 2>&1
386} 411}
387 412
388# @FUNCTION: test-flag-CC 413# @FUNCTION: test-flag-CC
389# @USAGE: <flag> 414# @USAGE: <flag>
416 441
417 shift 442 shift
418 443
419 [[ -z ${comp} ]] && return 1 444 [[ -z ${comp} ]] && return 1
420 445
421 x=""
422 for x in "$@" ; do 446 for x in "$@" ; do
423 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
424 done 448 done
425 449
426 echo "${flags}" 450 echo "${flags}"
457# @USAGE: <flags> 481# @USAGE: <flags>
458# @DESCRIPTION: 482# @DESCRIPTION:
459# Short-hand that should hopefully work for both C and C++ compiler, but 483# Short-hand that should hopefully work for both C and C++ compiler, but
460# its really only present due to the append-flags() abomination. 484# its really only present due to the append-flags() abomination.
461test-flags() { test-flags-CC "$@"; } 485test-flags() { test-flags-CC "$@"; }
462
463# @FUNCTION: test_flag
464# @DESCRIPTION:
465# DEPRICIATED, use test-flags()
466test_flag() {
467 ewarn "test_flag: deprecated, please use test-flags()!" >&2
468
469 test-flags-CC "$@"
470}
471 486
472# @FUNCTION: test_version_info 487# @FUNCTION: test_version_info
473# @USAGE: <version> 488# @USAGE: <version>
474# @DESCRIPTION: 489# @DESCRIPTION:
475# Returns shell true if the current C compiler version matches <version>, else returns shell false. 490# Returns shell true if the current C compiler version matches <version>, else returns shell false.
511 fi 526 fi
512 done 527 done
513 return 1 528 return 1
514} 529}
515 530
516# @FUNCTION: has_hardened 531# DEAD FUNCS. Remove by Dec 2011.
517# @DESCRIPTION: 532test_flag() { die "$0: deprecated, please use test-flags()!" ; }
518# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
519has_hardened() {
520 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 533has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
521
522 test_version_info Hardened && return 0
523 # The specs file wont exist unless gcc has GCC_SPECS support
524 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
525}
526
527# @FUNCTION: has_pic
528# @DESCRIPTION:
529# DEPRECATED - use gcc-specs-pie from toolchain-funcs
530# indicate whether PIC is set
531has_pic() {
532 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 534has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
533
534 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
535 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
536 gcc-specs-pie
537}
538
539# @FUNCTION: has_pie
540# @DESCRIPTION:
541# DEPRECATED - use gcc-specs-pie from toolchain-funcs
542# indicate whether PIE is set
543has_pie() {
544 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 535has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
545
546 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
547 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
548 gcc-specs-pie
549}
550
551# @FUNCTION: has_ssp_all
552# @DESCRIPTION:
553# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
554# indicate whether code for SSP is being generated for all functions
555has_ssp_all() {
556 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 536has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
557
558 # note; this matches only -fstack-protector-all
559 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
560 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
561 gcc-specs-ssp-to-all
562}
563
564# @FUNCTION: has_ssp
565# @DESCRIPTION:
566# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
567# indicate whether code for SSP is being generated
568has_ssp() {
569 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 537has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
570
571 # note; this matches both -fstack-protector and -fstack-protector-all
572 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
573 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
574 gcc-specs-ssp
575}
576 538
577# @FUNCTION: has_m64 539# @FUNCTION: has_m64
578# @DESCRIPTION: 540# @DESCRIPTION:
579# This doesn't test if the flag is accepted, it tests if the flag actually 541# 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 542# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
645 fi 607 fi
646 608
647 export CFLAGS CXXFLAGS 609 export CFLAGS CXXFLAGS
648} 610}
649 611
612# @FUNCTION: append-libs
613# @USAGE: <libs>
614# @DESCRIPTION:
615# Add extra <libs> to the current LIBS.
616append-libs() {
617 [[ $# -eq 0 ]] && return 0
618 local flag
619 for flag in "$@"; do
620 [[ ${flag} == -l* ]] && flag=${flag#-l}
621 export LIBS="${LIBS} -l${flag}"
622 done
623
624 return 0
625}
626
650# @FUNCTION: append-ldflags 627# @FUNCTION: append-ldflags
651# @USAGE: <flags> 628# @USAGE: <flags>
652# @DESCRIPTION: 629# @DESCRIPTION:
653# Add extra <flags> to the current LDFLAGS. 630# Add extra <flags> to the current LDFLAGS.
654append-ldflags() { 631append-ldflags() {
655 [[ -z $* ]] && return 0 632 [[ $# -eq 0 ]] && return 0
656 local flag 633 local flag
657 for flag in "$@"; do 634 for flag in "$@"; do
658 [[ ${flag} == -l* ]] && \ 635 [[ ${flag} == -l* ]] && \
659 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 636 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
660 done 637 done
671 _filter-var LDFLAGS "$@" 648 _filter-var LDFLAGS "$@"
672 return 0 649 return 0
673} 650}
674 651
675# @FUNCTION: raw-ldflags 652# @FUNCTION: raw-ldflags
676# @USAGE: <flags> 653# @USAGE: [flags]
677# @DESCRIPTION: 654# @DESCRIPTION:
678# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 655# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
679# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 656# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
680# to gcc where it needs the '-Wl,'. 657# to gcc where it needs the '-Wl,'.
658#
659# If no flags are specified, then default to ${LDFLAGS}.
681raw-ldflags() { 660raw-ldflags() {
682 local x input="$@" 661 local x input="$@"
683 [[ -z ${input} ]] && input=${LDFLAGS} 662 [[ -z ${input} ]] && input=${LDFLAGS}
684 set -- 663 set --
685 for x in ${input} ; do 664 for x in ${input} ; do
687 set -- "$@" ${x//,/ } 666 set -- "$@" ${x//,/ }
688 done 667 done
689 echo "$@" 668 echo "$@"
690} 669}
691 670
692# @FUNCTION: bindnow-flags 671# @FUNCTION: no-as-needed
693# @RETURN: Returns the flags to enable "now" binding in the current selected linker. 672# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
694# @DESCRIPTION: 673no-as-needed() {
695# DEPRECATED - Gets the flags needed for "NOW" binding 674 case $($(tc-getLD) -v 2>&1 </dev/null) in
696bindnow-flags() { 675 *GNU*) # GNU ld
697 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" 676 echo "-Wl,--no-as-needed" ;;
677 esac
698} 678}
699 679
700 680fi
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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