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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 1.133 2009/04/04 17:57:54 grobian 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
56 # killing these two on OSX/Intel will disable SSE, resulting in failing
57 # compilations, as the headers expect SSE to be enabled (Apple knows what
58 # hardware they run on afterall, don't they?)
59 [[ ${CHOST} == i?86-apple-darwin* ]] \
60 && ALLOWED_FLAGS="${ALLOWED_FLAGS} -march=prescott -march=nocona"
61 58
62 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 59 # 4.5
63 # NOTE: currently -Os have issues with gcc3 and K6* arch's 60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
64 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
65 return 0 65 return 0
66} 66}
67 67
68# inverted filters for hardened compiler. This is trying to unpick 68# inverted filters for hardened compiler. This is trying to unpick
69# the hardened compiler defaults. 69# the hardened compiler defaults.
126 126
127# @FUNCTION: filter-lfs-flags 127# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION: 128# @DESCRIPTION:
129# Remove flags that enable Large File Support. 129# Remove flags that enable Large File Support.
130filter-lfs-flags() { 130filter-lfs-flags() {
131 [[ -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)
132 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
133} 137}
134 138
135# @FUNCTION: append-cppflags 139# @FUNCTION: append-cppflags
136# @USAGE: <flags> 140# @USAGE: <flags>
137# @DESCRIPTION: 141# @DESCRIPTION:
138# Add extra <flags> to the current CPPFLAGS. 142# Add extra <flags> to the current CPPFLAGS.
139append-cppflags() { 143append-cppflags() {
140 [[ -z $* ]] && return 0 144 [[ $# -eq 0 ]] && return 0
141 export CPPFLAGS="${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 ${CFLAGS} "$@")
142 return 0 156 return 0
143} 157}
144 158
145# @FUNCTION: append-cxxflags 159# @FUNCTION: append-cxxflags
146# @USAGE: <flags> 160# @USAGE: <flags>
147# @DESCRIPTION: 161# @DESCRIPTION:
148# Add extra <flags> to the current CXXFLAGS. 162# Add extra <flags> to the current CXXFLAGS.
149append-cxxflags() { 163append-cxxflags() {
150 [[ -z $* ]] && return 0 164 [[ $# -eq 0 ]] && return 0
151 export CXXFLAGS="${CXXFLAGS} $*" 165 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
152 return 0 166 return 0
153} 167}
154 168
155# @FUNCTION: append-fflags 169# @FUNCTION: append-fflags
156# @USAGE: <flags> 170# @USAGE: <flags>
157# @DESCRIPTION: 171# @DESCRIPTION:
158# Add extra <flags> to the current {F,FC}FLAGS. 172# Add extra <flags> to the current {F,FC}FLAGS.
159append-fflags() { 173append-fflags() {
160 [[ -z $* ]] && return 0 174 [[ $# -eq 0 ]] && return 0
161 export FFLAGS="${FFLAGS} $*" 175 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
162 export FCFLAGS="${FCFLAGS} $*" 176 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
163 return 0 177 return 0
164} 178}
165 179
166# @FUNCTION: append-lfs-flags 180# @FUNCTION: append-lfs-flags
167# @DESCRIPTION: 181# @DESCRIPTION:
168# Add flags that enable Large File Support. 182# Add flags that enable Large File Support.
169append-lfs-flags() { 183append-lfs-flags() {
170 [[ -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
171 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
172} 187}
173 188
174# @FUNCTION: append-flags 189# @FUNCTION: append-flags
175# @USAGE: <flags> 190# @USAGE: <flags>
176# @DESCRIPTION: 191# @DESCRIPTION:
177# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 192# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
178append-flags() { 193append-flags() {
179 [[ -z $* ]] && return 0 194 [[ $# -eq 0 ]] && return 0
180 export CFLAGS="${CFLAGS} $*" 195 append-cflags "$@"
181 export CXXFLAGS="${CXXFLAGS} $*" 196 append-cxxflags "$@"
182 export FFLAGS="${FFLAGS} $*" 197 append-fflags "$@"
183 export FCFLAGS="${FCFLAGS} $*"
184 return 0 198 return 0
185} 199}
186 200
187# @FUNCTION: replace-flags 201# @FUNCTION: replace-flags
188# @USAGE: <old> <new> 202# @USAGE: <old> <new>
317 local NEW_CFLAGS="" 331 local NEW_CFLAGS=""
318 local NEW_CXXFLAGS="" 332 local NEW_CXXFLAGS=""
319 local NEW_FFLAGS="" 333 local NEW_FFLAGS=""
320 local NEW_FCFLAGS="" 334 local NEW_FCFLAGS=""
321 335
322 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
323 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
324 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
325 fi
326
327 set -f # disable pathname expansion 336 set -f # disable pathname expansion
328 337
329 for x in ${CFLAGS}; do 338 for x in ${CFLAGS}; do
330 for y in ${ALLOWED_FLAGS}; do 339 for y in ${ALLOWED_FLAGS}; do
331 flag=${x%%=*} 340 flag=${x%%=*}
391 400
392test-flag-PROG() { 401test-flag-PROG() {
393 local comp=$1 402 local comp=$1
394 local flags="$2" 403 local flags="$2"
395 404
396 [[ -z ${comp} || -z ${flags} ]] && \ 405 [[ -z ${comp} || -z ${flags} ]] && return 1
397 return 1
398 406
407 # use -c so we can test the assembler as well
399 local PROG=$(tc-get${comp}) 408 local PROG=$(tc-get${comp})
400 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 409 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
401 > /dev/null 2>&1 410 > /dev/null 2>&1
402} 411}
403 412
404# @FUNCTION: test-flag-CC 413# @FUNCTION: test-flag-CC
405# @USAGE: <flag> 414# @USAGE: <flag>
432 441
433 shift 442 shift
434 443
435 [[ -z ${comp} ]] && return 1 444 [[ -z ${comp} ]] && return 1
436 445
437 x=""
438 for x in "$@" ; do 446 for x in "$@" ; do
439 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
440 done 448 done
441 449
442 echo "${flags}" 450 echo "${flags}"
473# @USAGE: <flags> 481# @USAGE: <flags>
474# @DESCRIPTION: 482# @DESCRIPTION:
475# Short-hand that should hopefully work for both C and C++ compiler, but 483# Short-hand that should hopefully work for both C and C++ compiler, but
476# its really only present due to the append-flags() abomination. 484# its really only present due to the append-flags() abomination.
477test-flags() { test-flags-CC "$@"; } 485test-flags() { test-flags-CC "$@"; }
478
479# @FUNCTION: test_flag
480# @DESCRIPTION:
481# DEPRICIATED, use test-flags()
482test_flag() {
483 ewarn "test_flag: deprecated, please use test-flags()!" >&2
484
485 test-flags-CC "$@"
486}
487 486
488# @FUNCTION: test_version_info 487# @FUNCTION: test_version_info
489# @USAGE: <version> 488# @USAGE: <version>
490# @DESCRIPTION: 489# @DESCRIPTION:
491# 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.
527 fi 526 fi
528 done 527 done
529 return 1 528 return 1
530} 529}
531 530
532# @FUNCTION: has_hardened 531# DEAD FUNCS. Remove by Dec 2011.
533# @DESCRIPTION: 532test_flag() { die "$0: deprecated, please use test-flags()!" ; }
534# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
535has_hardened() {
536 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 533has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
537
538 test_version_info Hardened && return 0
539 # The specs file wont exist unless gcc has GCC_SPECS support
540 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
541}
542
543# @FUNCTION: has_pic
544# @DESCRIPTION:
545# DEPRECATED - use gcc-specs-pie from toolchain-funcs
546# indicate whether PIC is set
547has_pic() {
548 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 534has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
549
550 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
551 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
552 gcc-specs-pie
553}
554
555# @FUNCTION: has_pie
556# @DESCRIPTION:
557# DEPRECATED - use gcc-specs-pie from toolchain-funcs
558# indicate whether PIE is set
559has_pie() {
560 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 535has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
561
562 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
563 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
564 gcc-specs-pie
565}
566
567# @FUNCTION: has_ssp_all
568# @DESCRIPTION:
569# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
570# indicate whether code for SSP is being generated for all functions
571has_ssp_all() {
572 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 536has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
573
574 # note; this matches only -fstack-protector-all
575 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
576 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
577 gcc-specs-ssp-to-all
578}
579
580# @FUNCTION: has_ssp
581# @DESCRIPTION:
582# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
583# indicate whether code for SSP is being generated
584has_ssp() {
585 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 537has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
586
587 # note; this matches both -fstack-protector and -fstack-protector-all
588 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
589 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
590 gcc-specs-ssp
591}
592 538
593# @FUNCTION: has_m64 539# @FUNCTION: has_m64
594# @DESCRIPTION: 540# @DESCRIPTION:
595# 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
596# 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
661 fi 607 fi
662 608
663 export CFLAGS CXXFLAGS 609 export CFLAGS CXXFLAGS
664} 610}
665 611
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
666# @FUNCTION: append-ldflags 627# @FUNCTION: append-ldflags
667# @USAGE: <flags> 628# @USAGE: <flags>
668# @DESCRIPTION: 629# @DESCRIPTION:
669# Add extra <flags> to the current LDFLAGS. 630# Add extra <flags> to the current LDFLAGS.
670append-ldflags() { 631append-ldflags() {
671 [[ -z $* ]] && return 0 632 [[ $# -eq 0 ]] && return 0
672 local flag 633 local flag
673 for flag in "$@"; do 634 for flag in "$@"; do
674 [[ ${flag} == -l* ]] && \ 635 [[ ${flag} == -l* ]] && \
675 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 636 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
676 done 637 done
687 _filter-var LDFLAGS "$@" 648 _filter-var LDFLAGS "$@"
688 return 0 649 return 0
689} 650}
690 651
691# @FUNCTION: raw-ldflags 652# @FUNCTION: raw-ldflags
692# @USAGE: <flags> 653# @USAGE: [flags]
693# @DESCRIPTION: 654# @DESCRIPTION:
694# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 655# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
695# 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
696# 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 ${LDFLAGS}.
697raw-ldflags() { 660raw-ldflags() {
698 local x input="$@" 661 local x input="$@"
699 [[ -z ${input} ]] && input=${LDFLAGS} 662 [[ -z ${input} ]] && input=${LDFLAGS}
700 set -- 663 set --
701 for x in ${input} ; do 664 for x in ${input} ; do
703 set -- "$@" ${x//,/ } 666 set -- "$@" ${x//,/ }
704 done 667 done
705 echo "$@" 668 echo "$@"
706} 669}
707 670
708# @FUNCTION: bindnow-flags 671# @FUNCTION: no-as-needed
709# @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.
710# @DESCRIPTION: 673no-as-needed() {
711# DEPRECATED - Gets the flags needed for "NOW" binding 674 case $($(tc-getLD) -v 2>&1 </dev/null) in
712bindnow-flags() { 675 *GNU*) # GNU ld
713 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" 676 echo "-Wl,--no-as-needed" ;;
677 esac
714} 678}
715 679
716 680fi
717# Some tests for when we screw with things and want to make
718# sure we didn't break anything
719#TESTS() {
720# CFLAGS="-a -b -c=1"
721# CXXFLAGS="-x -y -z=2"
722# LDFLAGS="-l -m -n=3"
723#
724# die() { exit 1; }
725# (is-flag 1 2 3) && die
726# (is-ldflag 1 2 3) && die
727#
728# is-flagq -l && die
729# is-ldflagq -a && die
730# is-flagq -a || die
731# is-flagq -x || die
732# is-ldflagq -n=* || die
733# is-ldflagq -n && die
734#
735# strip-unsupported-flags
736# [[ ${CFLAGS} == "-c=1" ]] || die
737# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
738#
739# echo "All tests pass"
740#}
741#TESTS

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