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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 1.159 2011/12/07 06:42:40 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
34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" 40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
41 fi 41 fi
42 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow" 44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \ 51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -m*-toc -D* -U*" 56 -msecure-plt -m*-toc -D* -U*"
55 57
56 # killing these two on OSX/Intel will disable SSE, resulting in failing 58 # 4.5
57 # compilations, as the headers expect SSE to be enabled (Apple knows what 59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
58 # hardware they run on afterall, don't they?) 60 # 4.6
59 [[ ${CHOST} == i?86-apple-darwin* ]] \ 61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
60 && ALLOWED_FLAGS="${ALLOWED_FLAGS} -march=prescott -march=nocona" 62 -mno-bmi -mno-tbm"
61 63
62 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
63 # NOTE: currently -Os have issues with gcc3 and K6* arch's 65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
64 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
65 return 0 67 return 0
126 128
127# @FUNCTION: filter-lfs-flags 129# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION: 130# @DESCRIPTION:
129# Remove flags that enable Large File Support. 131# Remove flags that enable Large File Support.
130filter-lfs-flags() { 132filter-lfs-flags() {
131 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 133 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
134 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
135 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
136 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
137 # _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 138 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
133} 139}
134 140
135# @FUNCTION: append-cppflags 141# @FUNCTION: append-cppflags
136# @USAGE: <flags> 142# @USAGE: <flags>
137# @DESCRIPTION: 143# @DESCRIPTION:
138# Add extra <flags> to the current CPPFLAGS. 144# Add extra <flags> to the current CPPFLAGS.
139append-cppflags() { 145append-cppflags() {
140 [[ -z $* ]] && return 0 146 [[ $# -eq 0 ]] && return 0
141 export CPPFLAGS="${CPPFLAGS} $*" 147 export CPPFLAGS="${CPPFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS.
155append-cflags() {
156 [[ $# -eq 0 ]] && return 0
157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
142 return 0 158 return 0
143} 159}
144 160
145# @FUNCTION: append-cxxflags 161# @FUNCTION: append-cxxflags
146# @USAGE: <flags> 162# @USAGE: <flags>
147# @DESCRIPTION: 163# @DESCRIPTION:
148# Add extra <flags> to the current CXXFLAGS. 164# Add extra <flags> to the current CXXFLAGS.
149append-cxxflags() { 165append-cxxflags() {
150 [[ -z $* ]] && return 0 166 [[ $# -eq 0 ]] && return 0
151 export CXXFLAGS="${CXXFLAGS} $*" 167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
152 return 0 168 return 0
153} 169}
154 170
155# @FUNCTION: append-fflags 171# @FUNCTION: append-fflags
156# @USAGE: <flags> 172# @USAGE: <flags>
157# @DESCRIPTION: 173# @DESCRIPTION:
158# Add extra <flags> to the current {F,FC}FLAGS. 174# Add extra <flags> to the current {F,FC}FLAGS.
159append-fflags() { 175append-fflags() {
160 [[ -z $* ]] && return 0 176 [[ $# -eq 0 ]] && return 0
161 export FFLAGS="${FFLAGS} $*" 177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
162 export FCFLAGS="${FCFLAGS} $*" 178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
163 return 0 179 return 0
164} 180}
165 181
166# @FUNCTION: append-lfs-flags 182# @FUNCTION: append-lfs-flags
167# @DESCRIPTION: 183# @DESCRIPTION:
168# Add flags that enable Large File Support. 184# Add flags that enable Large File Support.
169append-lfs-flags() { 185append-lfs-flags() {
170 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # 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 188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
172} 189}
173 190
174# @FUNCTION: append-flags 191# @FUNCTION: append-flags
175# @USAGE: <flags> 192# @USAGE: <flags>
176# @DESCRIPTION: 193# @DESCRIPTION:
177# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
178append-flags() { 195append-flags() {
179 [[ -z $* ]] && return 0 196 [[ $# -eq 0 ]] && return 0
180 export CFLAGS="${CFLAGS} $*" 197 append-cflags "$@"
181 export CXXFLAGS="${CXXFLAGS} $*" 198 append-cxxflags "$@"
182 export FFLAGS="${FFLAGS} $*" 199 append-fflags "$@"
183 export FCFLAGS="${FCFLAGS} $*"
184 return 0 200 return 0
185} 201}
186 202
187# @FUNCTION: replace-flags 203# @FUNCTION: replace-flags
188# @USAGE: <old> <new> 204# @USAGE: <old> <new>
318 local NEW_CXXFLAGS="" 334 local NEW_CXXFLAGS=""
319 local NEW_FFLAGS="" 335 local NEW_FFLAGS=""
320 local NEW_FCFLAGS="" 336 local NEW_FCFLAGS=""
321 337
322 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 338 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
323 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 339 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
324 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 340 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
325 fi 341 fi
326 342
327 set -f # disable pathname expansion 343 set -f # disable pathname expansion
328 344
391 407
392test-flag-PROG() { 408test-flag-PROG() {
393 local comp=$1 409 local comp=$1
394 local flags="$2" 410 local flags="$2"
395 411
396 [[ -z ${comp} || -z ${flags} ]] && \ 412 [[ -z ${comp} || -z ${flags} ]] && return 1
397 return 1
398 413
414 # use -c so we can test the assembler as well
399 local PROG=$(tc-get${comp}) 415 local PROG=$(tc-get${comp})
400 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 416 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
401 > /dev/null 2>&1 417 > /dev/null 2>&1
402} 418}
403 419
404# @FUNCTION: test-flag-CC 420# @FUNCTION: test-flag-CC
405# @USAGE: <flag> 421# @USAGE: <flag>
432 448
433 shift 449 shift
434 450
435 [[ -z ${comp} ]] && return 1 451 [[ -z ${comp} ]] && return 1
436 452
437 x=""
438 for x in "$@" ; do 453 for x in "$@" ; do
439 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 454 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
440 done 455 done
441 456
442 echo "${flags}" 457 echo "${flags}"
473# @USAGE: <flags> 488# @USAGE: <flags>
474# @DESCRIPTION: 489# @DESCRIPTION:
475# Short-hand that should hopefully work for both C and C++ compiler, but 490# Short-hand that should hopefully work for both C and C++ compiler, but
476# its really only present due to the append-flags() abomination. 491# its really only present due to the append-flags() abomination.
477test-flags() { test-flags-CC "$@"; } 492test-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}
487 493
488# @FUNCTION: test_version_info 494# @FUNCTION: test_version_info
489# @USAGE: <version> 495# @USAGE: <version>
490# @DESCRIPTION: 496# @DESCRIPTION:
491# Returns shell true if the current C compiler version matches <version>, else returns shell false. 497# Returns shell true if the current C compiler version matches <version>, else returns shell false.
527 fi 533 fi
528 done 534 done
529 return 1 535 return 1
530} 536}
531 537
532# @FUNCTION: has_hardened 538# DEAD FUNCS. Remove by Dec 2011.
533# @DESCRIPTION: 539test_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 540has_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 541has_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 542has_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 543has_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 544has_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}
592 545
593# @FUNCTION: has_m64 546# @FUNCTION: has_m64
594# @DESCRIPTION: 547# @DESCRIPTION:
595# This doesn't test if the flag is accepted, it tests if the flag actually 548# 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 549# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
661 fi 614 fi
662 615
663 export CFLAGS CXXFLAGS 616 export CFLAGS CXXFLAGS
664} 617}
665 618
619# @FUNCTION: append-libs
620# @USAGE: <libs>
621# @DESCRIPTION:
622# Add extra <libs> to the current LIBS.
623append-libs() {
624 [[ $# -eq 0 ]] && return 0
625 local flag
626 for flag in "$@"; do
627 [[ ${flag} == -l* ]] && flag=${flag#-l}
628 export LIBS="${LIBS} -l${flag}"
629 done
630
631 return 0
632}
633
666# @FUNCTION: append-ldflags 634# @FUNCTION: append-ldflags
667# @USAGE: <flags> 635# @USAGE: <flags>
668# @DESCRIPTION: 636# @DESCRIPTION:
669# Add extra <flags> to the current LDFLAGS. 637# Add extra <flags> to the current LDFLAGS.
670append-ldflags() { 638append-ldflags() {
671 [[ -z $* ]] && return 0 639 [[ $# -eq 0 ]] && return 0
672 local flag 640 local flag
673 for flag in "$@"; do 641 for flag in "$@"; do
674 [[ ${flag} == -l* ]] && \ 642 [[ ${flag} == -l* ]] && \
675 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 643 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
676 done 644 done
687 _filter-var LDFLAGS "$@" 655 _filter-var LDFLAGS "$@"
688 return 0 656 return 0
689} 657}
690 658
691# @FUNCTION: raw-ldflags 659# @FUNCTION: raw-ldflags
692# @USAGE: <flags> 660# @USAGE: [flags]
693# @DESCRIPTION: 661# @DESCRIPTION:
694# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 662# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
695# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 663# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
696# to gcc where it needs the '-Wl,'. 664# to gcc where it needs the '-Wl,'.
665#
666# If no flags are specified, then default to ${LDFLAGS}.
697raw-ldflags() { 667raw-ldflags() {
698 local x input="$@" 668 local x input="$@"
699 [[ -z ${input} ]] && input=${LDFLAGS} 669 [[ -z ${input} ]] && input=${LDFLAGS}
700 set -- 670 set --
701 for x in ${input} ; do 671 for x in ${input} ; do
703 set -- "$@" ${x//,/ } 673 set -- "$@" ${x//,/ }
704 done 674 done
705 echo "$@" 675 echo "$@"
706} 676}
707 677
708# @FUNCTION: bindnow-flags 678# @FUNCTION: no-as-needed
709# @RETURN: Returns the flags to enable "now" binding in the current selected linker. 679# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
710# @DESCRIPTION: 680no-as-needed() {
711# DEPRECATED - Gets the flags needed for "NOW" binding 681 case $($(tc-getLD) -v 2>&1 </dev/null) in
712bindnow-flags() { 682 *GNU*) # GNU ld
713 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" 683 echo "-Wl,--no-as-needed" ;;
684 esac
714} 685}
715
716 686
717# Some tests for when we screw with things and want to make 687# Some tests for when we screw with things and want to make
718# sure we didn't break anything 688# sure we didn't break anything
719#TESTS() { 689#TESTS() {
720# CFLAGS="-a -b -c=1" 690# CFLAGS="-a -b -c=1"

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