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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 1.149 2011/02/01 05:41:30 dirtyepic 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 -fno-omit-frame-pointer" 44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \ 51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 -msecure-plt -m*-toc -D* -U*" 56 -msecure-plt -m*-toc -D* -U*"
57 57
58 # 4.5 58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp" 59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
128 128
129# @FUNCTION: filter-lfs-flags 129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION: 130# @DESCRIPTION:
131# Remove flags that enable Large File Support. 131# Remove flags that enable Large File Support.
132filter-lfs-flags() { 132filter-lfs-flags() {
133 [[ -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)
134 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
135} 139}
136 140
137# @FUNCTION: append-cppflags 141# @FUNCTION: append-cppflags
138# @USAGE: <flags> 142# @USAGE: <flags>
139# @DESCRIPTION: 143# @DESCRIPTION:
140# Add extra <flags> to the current CPPFLAGS. 144# Add extra <flags> to the current CPPFLAGS.
141append-cppflags() { 145append-cppflags() {
142 [[ -z $* ]] && return 0 146 [[ $# -eq 0 ]] && return 0
143 export CPPFLAGS="${CPPFLAGS} $*" 147 export CPPFLAGS="${CPPFLAGS} $*"
144 return 0 148 return 0
145} 149}
146 150
147# @FUNCTION: append-cflags 151# @FUNCTION: append-cflags
148# @USAGE: <flags> 152# @USAGE: <flags>
149# @DESCRIPTION: 153# @DESCRIPTION:
150# Add extra <flags> to the current CFLAGS. 154# Add extra <flags> to the current CFLAGS.
151append-cflags() { 155append-cflags() {
152 [[ -z $* ]] && return 0 156 [[ $# -eq 0 ]] && return 0
153 export CFLAGS="${CFLAGS} $*" 157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
154 return 0 158 return 0
155} 159}
156 160
157# @FUNCTION: append-cxxflags 161# @FUNCTION: append-cxxflags
158# @USAGE: <flags> 162# @USAGE: <flags>
159# @DESCRIPTION: 163# @DESCRIPTION:
160# Add extra <flags> to the current CXXFLAGS. 164# Add extra <flags> to the current CXXFLAGS.
161append-cxxflags() { 165append-cxxflags() {
162 [[ -z $* ]] && return 0 166 [[ $# -eq 0 ]] && return 0
163 export CXXFLAGS="${CXXFLAGS} $*" 167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
164 return 0 168 return 0
165} 169}
166 170
167# @FUNCTION: append-fflags 171# @FUNCTION: append-fflags
168# @USAGE: <flags> 172# @USAGE: <flags>
169# @DESCRIPTION: 173# @DESCRIPTION:
170# Add extra <flags> to the current {F,FC}FLAGS. 174# Add extra <flags> to the current {F,FC}FLAGS.
171append-fflags() { 175append-fflags() {
172 [[ -z $* ]] && return 0 176 [[ $# -eq 0 ]] && return 0
173 export FFLAGS="${FFLAGS} $*" 177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
174 export FCFLAGS="${FCFLAGS} $*" 178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
175 return 0 179 return 0
176} 180}
177 181
178# @FUNCTION: append-lfs-flags 182# @FUNCTION: append-lfs-flags
179# @DESCRIPTION: 183# @DESCRIPTION:
180# Add flags that enable Large File Support. 184# Add flags that enable Large File Support.
181append-lfs-flags() { 185append-lfs-flags() {
182 [[ -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
183 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
184} 189}
185 190
186# @FUNCTION: append-flags 191# @FUNCTION: append-flags
187# @USAGE: <flags> 192# @USAGE: <flags>
188# @DESCRIPTION: 193# @DESCRIPTION:
189# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
190append-flags() { 195append-flags() {
191 [[ -z $* ]] && return 0 196 [[ $# -eq 0 ]] && return 0
192 append-cflags "$@" 197 append-cflags "$@"
193 append-cxxflags "$@" 198 append-cxxflags "$@"
194 append-fflags "$@" 199 append-fflags "$@"
195 return 0 200 return 0
196} 201}
402 407
403test-flag-PROG() { 408test-flag-PROG() {
404 local comp=$1 409 local comp=$1
405 local flags="$2" 410 local flags="$2"
406 411
407 [[ -z ${comp} || -z ${flags} ]] && \ 412 [[ -z ${comp} || -z ${flags} ]] && return 1
408 return 1
409 413
414 # use -c so we can test the assembler as well
410 local PROG=$(tc-get${comp}) 415 local PROG=$(tc-get${comp})
411 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 416 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
412 > /dev/null 2>&1 417 > /dev/null 2>&1
413} 418}
414 419
415# @FUNCTION: test-flag-CC 420# @FUNCTION: test-flag-CC
416# @USAGE: <flag> 421# @USAGE: <flag>
443 448
444 shift 449 shift
445 450
446 [[ -z ${comp} ]] && return 1 451 [[ -z ${comp} ]] && return 1
447 452
448 x=""
449 for x in "$@" ; do 453 for x in "$@" ; do
450 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 454 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
451 done 455 done
452 456
453 echo "${flags}" 457 echo "${flags}"
484# @USAGE: <flags> 488# @USAGE: <flags>
485# @DESCRIPTION: 489# @DESCRIPTION:
486# Short-hand that should hopefully work for both C and C++ compiler, but 490# Short-hand that should hopefully work for both C and C++ compiler, but
487# its really only present due to the append-flags() abomination. 491# its really only present due to the append-flags() abomination.
488test-flags() { test-flags-CC "$@"; } 492test-flags() { test-flags-CC "$@"; }
489
490# @FUNCTION: test_flag
491# @DESCRIPTION:
492# DEPRICIATED, use test-flags()
493test_flag() {
494 ewarn "test_flag: deprecated, please use test-flags()!" >&2
495
496 test-flags-CC "$@"
497}
498 493
499# @FUNCTION: test_version_info 494# @FUNCTION: test_version_info
500# @USAGE: <version> 495# @USAGE: <version>
501# @DESCRIPTION: 496# @DESCRIPTION:
502# 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.
538 fi 533 fi
539 done 534 done
540 return 1 535 return 1
541} 536}
542 537
543# @FUNCTION: has_hardened 538# DEAD FUNCS. Remove by Dec 2011.
544# @DESCRIPTION: 539test_flag() { die "$0: deprecated, please use test-flags()!" ; }
545# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
546has_hardened() {
547 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 540has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
548
549 test_version_info Hardened && return 0
550 # The specs file wont exist unless gcc has GCC_SPECS support
551 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
552}
553
554# @FUNCTION: has_pic
555# @DESCRIPTION:
556# DEPRECATED - use gcc-specs-pie from toolchain-funcs
557# indicate whether PIC is set
558has_pic() {
559 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 541has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
560
561 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
562 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
563 gcc-specs-pie
564}
565
566# @FUNCTION: has_pie
567# @DESCRIPTION:
568# DEPRECATED - use gcc-specs-pie from toolchain-funcs
569# indicate whether PIE is set
570has_pie() {
571 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 542has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
572
573 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
574 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
575 gcc-specs-pie
576}
577
578# @FUNCTION: has_ssp_all
579# @DESCRIPTION:
580# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
581# indicate whether code for SSP is being generated for all functions
582has_ssp_all() {
583 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 543has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
584
585 # note; this matches only -fstack-protector-all
586 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
587 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
588 gcc-specs-ssp-to-all
589}
590
591# @FUNCTION: has_ssp
592# @DESCRIPTION:
593# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
594# indicate whether code for SSP is being generated
595has_ssp() {
596 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 544has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
597
598 # note; this matches both -fstack-protector and -fstack-protector-all
599 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
600 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
601 gcc-specs-ssp
602}
603 545
604# @FUNCTION: has_m64 546# @FUNCTION: has_m64
605# @DESCRIPTION: 547# @DESCRIPTION:
606# 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
607# 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
677# @FUNCTION: append-libs 619# @FUNCTION: append-libs
678# @USAGE: <libs> 620# @USAGE: <libs>
679# @DESCRIPTION: 621# @DESCRIPTION:
680# Add extra <libs> to the current LIBS. 622# Add extra <libs> to the current LIBS.
681append-libs() { 623append-libs() {
682 [[ -z $* ]] && return 0 624 [[ $# -eq 0 ]] && return 0
683 local flag 625 local flag
684 for flag in "$@"; do 626 for flag in "$@"; do
685 [[ ${flag} == -l* ]] && flag=${flag#-l} 627 [[ ${flag} == -l* ]] && flag=${flag#-l}
686 export LIBS="${LIBS} -l${flag}" 628 export LIBS="${LIBS} -l${flag}"
687 done 629 done
692# @FUNCTION: append-ldflags 634# @FUNCTION: append-ldflags
693# @USAGE: <flags> 635# @USAGE: <flags>
694# @DESCRIPTION: 636# @DESCRIPTION:
695# Add extra <flags> to the current LDFLAGS. 637# Add extra <flags> to the current LDFLAGS.
696append-ldflags() { 638append-ldflags() {
697 [[ -z $* ]] && return 0 639 [[ $# -eq 0 ]] && return 0
698 local flag 640 local flag
699 for flag in "$@"; do 641 for flag in "$@"; do
700 [[ ${flag} == -l* ]] && \ 642 [[ ${flag} == -l* ]] && \
701 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 643 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
702 done 644 done
713 _filter-var LDFLAGS "$@" 655 _filter-var LDFLAGS "$@"
714 return 0 656 return 0
715} 657}
716 658
717# @FUNCTION: raw-ldflags 659# @FUNCTION: raw-ldflags
718# @USAGE: <flags> 660# @USAGE: [flags]
719# @DESCRIPTION: 661# @DESCRIPTION:
720# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 662# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
721# 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
722# 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 ${LDFLAGS}.
723raw-ldflags() { 667raw-ldflags() {
724 local x input="$@" 668 local x input="$@"
725 [[ -z ${input} ]] && input=${LDFLAGS} 669 [[ -z ${input} ]] && input=${LDFLAGS}
726 set -- 670 set --
727 for x in ${input} ; do 671 for x in ${input} ; do

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