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1# Copyright 1999-2008 Gentoo Foundation 1# Copyright 1999-2009 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 1.124 2008/07/03 05:30:54 dberkholz Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.152 2011/07/12 04:08:52 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
31setup-allowed-flags() { 31setup-allowed-flags() {
32 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
33 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
34 export ALLOWED_FLAGS="${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" 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="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking" 44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \ 51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -D*" 56 -msecure-plt -m*-toc -D* -U*"
57
58 # 4.5
59 ALLOWED_FLAGS="${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"
55 63
56 # {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
57 # NOTE: currently -Os have issues with gcc3 and K6* arch's 65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
59 return 0 67 return 0
71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72 gcc-specs-pie || continue 80 gcc-specs-pie || continue
73 is-flagq -nopie || append-flags -nopie;; 81 is-flagq -nopie || append-flags -nopie;;
74 -fstack-protector) 82 -fstack-protector)
75 gcc-specs-ssp || continue 83 gcc-specs-ssp || continue
76 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
77 -fstack-protector-all) 85 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue 86 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 87 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 -fno-strict-overflow)
89 gcc-specs-nostrict || continue
90 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
80 esac 91 esac
81 done 92 done
82} 93}
83 94
84# Remove occurrences of strings from variable given in $1 95# Remove occurrences of strings from variable given in $1
131 [[ -z $* ]] && return 0 142 [[ -z $* ]] && return 0
132 export CPPFLAGS="${CPPFLAGS} $*" 143 export CPPFLAGS="${CPPFLAGS} $*"
133 return 0 144 return 0
134} 145}
135 146
147# @FUNCTION: append-cflags
148# @USAGE: <flags>
149# @DESCRIPTION:
150# Add extra <flags> to the current CFLAGS.
151append-cflags() {
152 [[ -z $* ]] && return 0
153 export CFLAGS="${CFLAGS} $*"
154 return 0
155}
156
157# @FUNCTION: append-cxxflags
158# @USAGE: <flags>
159# @DESCRIPTION:
160# Add extra <flags> to the current CXXFLAGS.
161append-cxxflags() {
162 [[ -z $* ]] && return 0
163 export CXXFLAGS="${CXXFLAGS} $*"
164 return 0
165}
166
136# @FUNCTION: append-fflags 167# @FUNCTION: append-fflags
137# @USAGE: <flags> 168# @USAGE: <flags>
138# @DESCRIPTION: 169# @DESCRIPTION:
139# Add extra <flags> to the current {F,FC}FLAGS. 170# Add extra <flags> to the current {F,FC}FLAGS.
140append-fflags() { 171append-fflags() {
156# @USAGE: <flags> 187# @USAGE: <flags>
157# @DESCRIPTION: 188# @DESCRIPTION:
158# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 189# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
159append-flags() { 190append-flags() {
160 [[ -z $* ]] && return 0 191 [[ -z $* ]] && return 0
161 export CFLAGS="${CFLAGS} $*" 192 append-cflags "$@"
162 export CXXFLAGS="${CXXFLAGS} $*" 193 append-cxxflags "$@"
163 export FFLAGS="${FFLAGS} $*" 194 append-fflags "$@"
164 export FCFLAGS="${FCFLAGS} $*"
165 return 0 195 return 0
166} 196}
167 197
168# @FUNCTION: replace-flags 198# @FUNCTION: replace-flags
169# @USAGE: <old> <new> 199# @USAGE: <old> <new>
173 [[ $# != 2 ]] \ 203 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 204 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#" 205 && die "replace-flags takes 2 arguments, not $#"
176 206
177 local f fset 207 local f fset
178 declare -a new_CFLAGS new_CXXFLAGS 208 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
179 209
180 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do 210 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
181 # Looping over the flags instead of using a global 211 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms. 212 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the 213 # Otherwise globs like -O* have the potential to wipe out the
299 local NEW_CXXFLAGS="" 329 local NEW_CXXFLAGS=""
300 local NEW_FFLAGS="" 330 local NEW_FFLAGS=""
301 local NEW_FCFLAGS="" 331 local NEW_FCFLAGS=""
302 332
303 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 333 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
304 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 334 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
305 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 335 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
306 fi 336 fi
307 337
308 set -f # disable pathname expansion 338 set -f # disable pathname expansion
309 339
372 402
373test-flag-PROG() { 403test-flag-PROG() {
374 local comp=$1 404 local comp=$1
375 local flags="$2" 405 local flags="$2"
376 406
377 [[ -z ${comp} || -z ${flags} ]] && \ 407 [[ -z ${comp} || -z ${flags} ]] && return 1
378 return 1
379 408
409 # use -c so we can test the assembler as well
380 local PROG=$(tc-get${comp}) 410 local PROG=$(tc-get${comp})
381 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 411 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
382 > /dev/null 2>&1 412 > /dev/null 2>&1
383} 413}
384 414
385# @FUNCTION: test-flag-CC 415# @FUNCTION: test-flag-CC
386# @USAGE: <flag> 416# @USAGE: <flag>
454# @USAGE: <flags> 484# @USAGE: <flags>
455# @DESCRIPTION: 485# @DESCRIPTION:
456# Short-hand that should hopefully work for both C and C++ compiler, but 486# Short-hand that should hopefully work for both C and C++ compiler, but
457# its really only present due to the append-flags() abomination. 487# its really only present due to the append-flags() abomination.
458test-flags() { test-flags-CC "$@"; } 488test-flags() { test-flags-CC "$@"; }
459
460# @FUNCTION: test_flag
461# @DESCRIPTION:
462# DEPRICIATED, use test-flags()
463test_flag() {
464 ewarn "test_flag: deprecated, please use test-flags()!" >&2
465
466 test-flags-CC "$@"
467}
468 489
469# @FUNCTION: test_version_info 490# @FUNCTION: test_version_info
470# @USAGE: <version> 491# @USAGE: <version>
471# @DESCRIPTION: 492# @DESCRIPTION:
472# Returns shell true if the current C compiler version matches <version>, else returns shell false. 493# Returns shell true if the current C compiler version matches <version>, else returns shell false.
508 fi 529 fi
509 done 530 done
510 return 1 531 return 1
511} 532}
512 533
513# @FUNCTION: has_hardened 534# DEAD FUNCS. Remove by Dec 2011.
514# @DESCRIPTION: 535test_flag() { die "$0: deprecated, please use test-flags()!" ; }
515# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
516has_hardened() {
517 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 536has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
518
519 test_version_info Hardened && return 0
520 # The specs file wont exist unless gcc has GCC_SPECS support
521 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
522}
523
524# @FUNCTION: has_pic
525# @DESCRIPTION:
526# DEPRECATED - use gcc-specs-pie from toolchain-funcs
527# indicate whether PIC is set
528has_pic() {
529 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 537has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
530
531 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
532 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
533 gcc-specs-pie
534}
535
536# @FUNCTION: has_pie
537# @DESCRIPTION:
538# DEPRECATED - use gcc-specs-pie from toolchain-funcs
539# indicate whether PIE is set
540has_pie() {
541 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 538has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
542
543 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
544 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
545 gcc-specs-pie
546}
547
548# @FUNCTION: has_ssp_all
549# @DESCRIPTION:
550# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
551# indicate whether code for SSP is being generated for all functions
552has_ssp_all() {
553 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 539has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
554
555 # note; this matches only -fstack-protector-all
556 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
557 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
558 gcc-specs-ssp-all
559}
560
561# @FUNCTION: has_ssp
562# @DESCRIPTION:
563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
564# indicate whether code for SSP is being generated
565has_ssp() {
566 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 540has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
567
568 # note; this matches both -fstack-protector and -fstack-protector-all
569 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
571 gcc-specs-ssp
572}
573 541
574# @FUNCTION: has_m64 542# @FUNCTION: has_m64
575# @DESCRIPTION: 543# @DESCRIPTION:
576# This doesn't test if the flag is accepted, it tests if the flag actually 544# This doesn't test if the flag is accepted, it tests if the flag actually
577# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 545# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
640 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 608 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
641 done 609 done
642 fi 610 fi
643 611
644 export CFLAGS CXXFLAGS 612 export CFLAGS CXXFLAGS
613}
614
615# @FUNCTION: append-libs
616# @USAGE: <libs>
617# @DESCRIPTION:
618# Add extra <libs> to the current LIBS.
619append-libs() {
620 [[ -z $* ]] && return 0
621 local flag
622 for flag in "$@"; do
623 [[ ${flag} == -l* ]] && flag=${flag#-l}
624 export LIBS="${LIBS} -l${flag}"
625 done
626
627 return 0
645} 628}
646 629
647# @FUNCTION: append-ldflags 630# @FUNCTION: append-ldflags
648# @USAGE: <flags> 631# @USAGE: <flags>
649# @DESCRIPTION: 632# @DESCRIPTION:
684 set -- "$@" ${x//,/ } 667 set -- "$@" ${x//,/ }
685 done 668 done
686 echo "$@" 669 echo "$@"
687} 670}
688 671
689# @FUNCTION: bindnow-flags 672# @FUNCTION: no-as-needed
690# @RETURN: Returns the flags to enable "now" binding in the current selected linker. 673# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
691# @DESCRIPTION: 674no-as-needed() {
692# DEPRECATED - Gets the flags needed for "NOW" binding
693bindnow-flags() {
694 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2
695
696 case $($(tc-getLD) -v 2>&1 </dev/null) in 675 case $($(tc-getLD) -v 2>&1 </dev/null) in
697 *GNU* | *'with BFD'*) # GNU ld 676 *GNU*) # GNU ld
698 echo "-Wl,-z,now" ;; 677 echo "-Wl,--no-as-needed" ;;
699 *Apple*) # Darwin ld
700 echo "-bind_at_load" ;;
701 *)
702 # Some linkers just recognize -V instead of -v
703 case $($(tc-getLD) -V 2>&1 </dev/null) in
704 *Solaris*) # Solaris accept almost the same GNU options
705 echo "-Wl,-z,now" ;;
706 esac
707 ;;
708 esac 678 esac
709} 679}
710
711 680
712# Some tests for when we screw with things and want to make 681# Some tests for when we screw with things and want to make
713# sure we didn't break anything 682# sure we didn't break anything
714#TESTS() { 683#TESTS() {
715# CFLAGS="-a -b -c=1" 684# CFLAGS="-a -b -c=1"

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