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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 1.148 2010/05/08 03:47:41 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"
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \ 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 \ 47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \ 48 -mno-popcnt -mno-abm \
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 \ 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"
60 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62 -mno-bmi -mno-tbm"
60 63
61 # {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
62 # NOTE: currently -Os have issues with gcc3 and K6* arch's 65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
63 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
64 return 0 67 return 0
125 128
126# @FUNCTION: filter-lfs-flags 129# @FUNCTION: filter-lfs-flags
127# @DESCRIPTION: 130# @DESCRIPTION:
128# Remove flags that enable Large File Support. 131# Remove flags that enable Large File Support.
129filter-lfs-flags() { 132filter-lfs-flags() {
130 [[ -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)
131 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
132} 139}
133 140
134# @FUNCTION: append-cppflags 141# @FUNCTION: append-cppflags
135# @USAGE: <flags> 142# @USAGE: <flags>
136# @DESCRIPTION: 143# @DESCRIPTION:
137# Add extra <flags> to the current CPPFLAGS. 144# Add extra <flags> to the current CPPFLAGS.
138append-cppflags() { 145append-cppflags() {
139 [[ -z $* ]] && return 0 146 [[ $# -eq 0 ]] && return 0
140 export CPPFLAGS="${CPPFLAGS} $*" 147 export CPPFLAGS="${CPPFLAGS} $*"
141 return 0 148 return 0
142} 149}
143 150
144# @FUNCTION: append-cflags 151# @FUNCTION: append-cflags
145# @USAGE: <flags> 152# @USAGE: <flags>
146# @DESCRIPTION: 153# @DESCRIPTION:
147# Add extra <flags> to the current CFLAGS. 154# Add extra <flags> to the current CFLAGS.
148append-cflags() { 155append-cflags() {
149 [[ -z $* ]] && return 0 156 [[ $# -eq 0 ]] && return 0
150 export CFLAGS="${CFLAGS} $*" 157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
151 return 0 158 return 0
152} 159}
153 160
154# @FUNCTION: append-cxxflags 161# @FUNCTION: append-cxxflags
155# @USAGE: <flags> 162# @USAGE: <flags>
156# @DESCRIPTION: 163# @DESCRIPTION:
157# Add extra <flags> to the current CXXFLAGS. 164# Add extra <flags> to the current CXXFLAGS.
158append-cxxflags() { 165append-cxxflags() {
159 [[ -z $* ]] && return 0 166 [[ $# -eq 0 ]] && return 0
160 export CXXFLAGS="${CXXFLAGS} $*" 167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
161 return 0 168 return 0
162} 169}
163 170
164# @FUNCTION: append-fflags 171# @FUNCTION: append-fflags
165# @USAGE: <flags> 172# @USAGE: <flags>
166# @DESCRIPTION: 173# @DESCRIPTION:
167# Add extra <flags> to the current {F,FC}FLAGS. 174# Add extra <flags> to the current {F,FC}FLAGS.
168append-fflags() { 175append-fflags() {
169 [[ -z $* ]] && return 0 176 [[ $# -eq 0 ]] && return 0
170 export FFLAGS="${FFLAGS} $*" 177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
171 export FCFLAGS="${FCFLAGS} $*" 178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
172 return 0 179 return 0
173} 180}
174 181
175# @FUNCTION: append-lfs-flags 182# @FUNCTION: append-lfs-flags
176# @DESCRIPTION: 183# @DESCRIPTION:
177# Add flags that enable Large File Support. 184# Add flags that enable Large File Support.
178append-lfs-flags() { 185append-lfs-flags() {
179 [[ -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
180 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
181} 189}
182 190
183# @FUNCTION: append-flags 191# @FUNCTION: append-flags
184# @USAGE: <flags> 192# @USAGE: <flags>
185# @DESCRIPTION: 193# @DESCRIPTION:
186# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
187append-flags() { 195append-flags() {
188 [[ -z $* ]] && return 0 196 [[ $# -eq 0 ]] && return 0
189 append-cflags "$@" 197 append-cflags "$@"
190 append-cxxflags "$@" 198 append-cxxflags "$@"
191 append-fflags "$@" 199 append-fflags "$@"
192 return 0 200 return 0
193} 201}
399 407
400test-flag-PROG() { 408test-flag-PROG() {
401 local comp=$1 409 local comp=$1
402 local flags="$2" 410 local flags="$2"
403 411
404 [[ -z ${comp} || -z ${flags} ]] && \ 412 [[ -z ${comp} || -z ${flags} ]] && return 1
405 return 1
406 413
414 # use -c so we can test the assembler as well
407 local PROG=$(tc-get${comp}) 415 local PROG=$(tc-get${comp})
408 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 416 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
409 > /dev/null 2>&1 417 > /dev/null 2>&1
410} 418}
411 419
412# @FUNCTION: test-flag-CC 420# @FUNCTION: test-flag-CC
413# @USAGE: <flag> 421# @USAGE: <flag>
440 448
441 shift 449 shift
442 450
443 [[ -z ${comp} ]] && return 1 451 [[ -z ${comp} ]] && return 1
444 452
445 x=""
446 for x in "$@" ; do 453 for x in "$@" ; do
447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 454 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
448 done 455 done
449 456
450 echo "${flags}" 457 echo "${flags}"
481# @USAGE: <flags> 488# @USAGE: <flags>
482# @DESCRIPTION: 489# @DESCRIPTION:
483# Short-hand that should hopefully work for both C and C++ compiler, but 490# Short-hand that should hopefully work for both C and C++ compiler, but
484# its really only present due to the append-flags() abomination. 491# its really only present due to the append-flags() abomination.
485test-flags() { test-flags-CC "$@"; } 492test-flags() { test-flags-CC "$@"; }
486
487# @FUNCTION: test_flag
488# @DESCRIPTION:
489# DEPRICIATED, use test-flags()
490test_flag() {
491 ewarn "test_flag: deprecated, please use test-flags()!" >&2
492
493 test-flags-CC "$@"
494}
495 493
496# @FUNCTION: test_version_info 494# @FUNCTION: test_version_info
497# @USAGE: <version> 495# @USAGE: <version>
498# @DESCRIPTION: 496# @DESCRIPTION:
499# 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.
535 fi 533 fi
536 done 534 done
537 return 1 535 return 1
538} 536}
539 537
540# @FUNCTION: has_hardened 538# DEAD FUNCS. Remove by Dec 2011.
541# @DESCRIPTION: 539test_flag() { die "$0: deprecated, please use test-flags()!" ; }
542# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
543has_hardened() {
544 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 540has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
545
546 test_version_info Hardened && return 0
547 # The specs file wont exist unless gcc has GCC_SPECS support
548 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
549}
550
551# @FUNCTION: has_pic
552# @DESCRIPTION:
553# DEPRECATED - use gcc-specs-pie from toolchain-funcs
554# indicate whether PIC is set
555has_pic() {
556 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 541has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
557
558 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
559 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
560 gcc-specs-pie
561}
562
563# @FUNCTION: has_pie
564# @DESCRIPTION:
565# DEPRECATED - use gcc-specs-pie from toolchain-funcs
566# indicate whether PIE is set
567has_pie() {
568 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 542has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
569
570 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
571 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
572 gcc-specs-pie
573}
574
575# @FUNCTION: has_ssp_all
576# @DESCRIPTION:
577# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
578# indicate whether code for SSP is being generated for all functions
579has_ssp_all() {
580 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 543has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
581
582 # note; this matches only -fstack-protector-all
583 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
584 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
585 gcc-specs-ssp-to-all
586}
587
588# @FUNCTION: has_ssp
589# @DESCRIPTION:
590# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
591# indicate whether code for SSP is being generated
592has_ssp() {
593 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 544has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
594
595 # note; this matches both -fstack-protector and -fstack-protector-all
596 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
597 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
598 gcc-specs-ssp
599}
600 545
601# @FUNCTION: has_m64 546# @FUNCTION: has_m64
602# @DESCRIPTION: 547# @DESCRIPTION:
603# 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
604# 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
674# @FUNCTION: append-libs 619# @FUNCTION: append-libs
675# @USAGE: <libs> 620# @USAGE: <libs>
676# @DESCRIPTION: 621# @DESCRIPTION:
677# Add extra <libs> to the current LIBS. 622# Add extra <libs> to the current LIBS.
678append-libs() { 623append-libs() {
679 [[ -z $* ]] && return 0 624 [[ $# -eq 0 ]] && return 0
680 local flag 625 local flag
681 for flag in "$@"; do 626 for flag in "$@"; do
682 [[ ${flag} == -l* ]] && flag=${flag#-l} 627 [[ ${flag} == -l* ]] && flag=${flag#-l}
683 export LIBS="${LIBS} -l${flag}" 628 export LIBS="${LIBS} -l${flag}"
684 done 629 done
689# @FUNCTION: append-ldflags 634# @FUNCTION: append-ldflags
690# @USAGE: <flags> 635# @USAGE: <flags>
691# @DESCRIPTION: 636# @DESCRIPTION:
692# Add extra <flags> to the current LDFLAGS. 637# Add extra <flags> to the current LDFLAGS.
693append-ldflags() { 638append-ldflags() {
694 [[ -z $* ]] && return 0 639 [[ $# -eq 0 ]] && return 0
695 local flag 640 local flag
696 for flag in "$@"; do 641 for flag in "$@"; do
697 [[ ${flag} == -l* ]] && \ 642 [[ ${flag} == -l* ]] && \
698 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 643 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
699 done 644 done
710 _filter-var LDFLAGS "$@" 655 _filter-var LDFLAGS "$@"
711 return 0 656 return 0
712} 657}
713 658
714# @FUNCTION: raw-ldflags 659# @FUNCTION: raw-ldflags
715# @USAGE: <flags> 660# @USAGE: [flags]
716# @DESCRIPTION: 661# @DESCRIPTION:
717# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 662# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
718# 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
719# 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 ${LDFLAGS}.
720raw-ldflags() { 667raw-ldflags() {
721 local x input="$@" 668 local x input="$@"
722 [[ -z ${input} ]] && input=${LDFLAGS} 669 [[ -z ${input} ]] && input=${LDFLAGS}
723 set -- 670 set --
724 for x in ${input} ; do 671 for x in ${input} ; do

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