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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 1.132 2009/01/21 00:42:20 gengor Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.160 2011/12/10 20:03:17 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
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 [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
12 15
13inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
14 17
15################ DEPRECATED functions ################ 18################ DEPRECATED functions ################
16# The following are still present to avoid breaking existing 19# The following are still present to avoid breaking existing
34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow" 39 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" 40 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+" 41 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 42 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" 43 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
41 fi 44 fi
42 # allow a bunch of flags that negate features / control ABI 45 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 46 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow" 47 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 48 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 49 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
50 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
51 -mno-popcnt -mno-abm \
47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 52 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 53 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \ 54 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 55 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 56 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 57 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 58 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -m*-toc -D* -U*" 59 -msecure-plt -m*-toc -D* -U*"
60
61 # 4.5
62 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
63 # 4.6
64 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
65 -mno-bmi -mno-tbm"
55 66
56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 67 # {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 68 # NOTE: currently -Os have issues with gcc3 and K6* arch's
58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 69 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
59 return 0 70 return 0
120 131
121# @FUNCTION: filter-lfs-flags 132# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION: 133# @DESCRIPTION:
123# Remove flags that enable Large File Support. 134# Remove flags that enable Large File Support.
124filter-lfs-flags() { 135filter-lfs-flags() {
125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 136 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
137 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
138 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
139 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
140 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 141 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127} 142}
128 143
129# @FUNCTION: append-cppflags 144# @FUNCTION: append-cppflags
130# @USAGE: <flags> 145# @USAGE: <flags>
131# @DESCRIPTION: 146# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS. 147# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() { 148append-cppflags() {
134 [[ -z $* ]] && return 0 149 [[ $# -eq 0 ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*" 150 export CPPFLAGS="${CPPFLAGS} $*"
151 return 0
152}
153
154# @FUNCTION: append-cflags
155# @USAGE: <flags>
156# @DESCRIPTION:
157# Add extra <flags> to the current CFLAGS.
158append-cflags() {
159 [[ $# -eq 0 ]] && return 0
160 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
136 return 0 161 return 0
137} 162}
138 163
139# @FUNCTION: append-cxxflags 164# @FUNCTION: append-cxxflags
140# @USAGE: <flags> 165# @USAGE: <flags>
141# @DESCRIPTION: 166# @DESCRIPTION:
142# Add extra <flags> to the current CXXFLAGS. 167# Add extra <flags> to the current CXXFLAGS.
143append-cxxflags() { 168append-cxxflags() {
144 [[ -z $* ]] && return 0 169 [[ $# -eq 0 ]] && return 0
145 export CXXFLAGS="${CXXFLAGS} $*" 170 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
146 return 0 171 return 0
147} 172}
148 173
149# @FUNCTION: append-fflags 174# @FUNCTION: append-fflags
150# @USAGE: <flags> 175# @USAGE: <flags>
151# @DESCRIPTION: 176# @DESCRIPTION:
152# Add extra <flags> to the current {F,FC}FLAGS. 177# Add extra <flags> to the current {F,FC}FLAGS.
153append-fflags() { 178append-fflags() {
154 [[ -z $* ]] && return 0 179 [[ $# -eq 0 ]] && return 0
155 export FFLAGS="${FFLAGS} $*" 180 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
156 export FCFLAGS="${FCFLAGS} $*" 181 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
157 return 0 182 return 0
158} 183}
159 184
160# @FUNCTION: append-lfs-flags 185# @FUNCTION: append-lfs-flags
161# @DESCRIPTION: 186# @DESCRIPTION:
162# Add flags that enable Large File Support. 187# Add flags that enable Large File Support.
163append-lfs-flags() { 188append-lfs-flags() {
164 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 189 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
190 # see comments in filter-lfs-flags func for meaning of these
165 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 191 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
166} 192}
167 193
168# @FUNCTION: append-flags 194# @FUNCTION: append-flags
169# @USAGE: <flags> 195# @USAGE: <flags>
170# @DESCRIPTION: 196# @DESCRIPTION:
171# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 197# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
172append-flags() { 198append-flags() {
173 [[ -z $* ]] && return 0 199 [[ $# -eq 0 ]] && return 0
174 export CFLAGS="${CFLAGS} $*" 200 append-cflags "$@"
175 export CXXFLAGS="${CXXFLAGS} $*" 201 append-cxxflags "$@"
176 export FFLAGS="${FFLAGS} $*" 202 append-fflags "$@"
177 export FCFLAGS="${FCFLAGS} $*"
178 return 0 203 return 0
179} 204}
180 205
181# @FUNCTION: replace-flags 206# @FUNCTION: replace-flags
182# @USAGE: <old> <new> 207# @USAGE: <old> <new>
312 local NEW_CXXFLAGS="" 337 local NEW_CXXFLAGS=""
313 local NEW_FFLAGS="" 338 local NEW_FFLAGS=""
314 local NEW_FCFLAGS="" 339 local NEW_FCFLAGS=""
315 340
316 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 341 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
317 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 342 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
318 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 343 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
319 fi 344 fi
320 345
321 set -f # disable pathname expansion 346 set -f # disable pathname expansion
322 347
385 410
386test-flag-PROG() { 411test-flag-PROG() {
387 local comp=$1 412 local comp=$1
388 local flags="$2" 413 local flags="$2"
389 414
390 [[ -z ${comp} || -z ${flags} ]] && \ 415 [[ -z ${comp} || -z ${flags} ]] && return 1
391 return 1
392 416
417 # use -c so we can test the assembler as well
393 local PROG=$(tc-get${comp}) 418 local PROG=$(tc-get${comp})
394 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 419 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
395 > /dev/null 2>&1 420 > /dev/null 2>&1
396} 421}
397 422
398# @FUNCTION: test-flag-CC 423# @FUNCTION: test-flag-CC
399# @USAGE: <flag> 424# @USAGE: <flag>
426 451
427 shift 452 shift
428 453
429 [[ -z ${comp} ]] && return 1 454 [[ -z ${comp} ]] && return 1
430 455
431 x=""
432 for x in "$@" ; do 456 for x in "$@" ; do
433 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 457 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
434 done 458 done
435 459
436 echo "${flags}" 460 echo "${flags}"
467# @USAGE: <flags> 491# @USAGE: <flags>
468# @DESCRIPTION: 492# @DESCRIPTION:
469# Short-hand that should hopefully work for both C and C++ compiler, but 493# Short-hand that should hopefully work for both C and C++ compiler, but
470# its really only present due to the append-flags() abomination. 494# its really only present due to the append-flags() abomination.
471test-flags() { test-flags-CC "$@"; } 495test-flags() { test-flags-CC "$@"; }
472
473# @FUNCTION: test_flag
474# @DESCRIPTION:
475# DEPRICIATED, use test-flags()
476test_flag() {
477 ewarn "test_flag: deprecated, please use test-flags()!" >&2
478
479 test-flags-CC "$@"
480}
481 496
482# @FUNCTION: test_version_info 497# @FUNCTION: test_version_info
483# @USAGE: <version> 498# @USAGE: <version>
484# @DESCRIPTION: 499# @DESCRIPTION:
485# Returns shell true if the current C compiler version matches <version>, else returns shell false. 500# Returns shell true if the current C compiler version matches <version>, else returns shell false.
521 fi 536 fi
522 done 537 done
523 return 1 538 return 1
524} 539}
525 540
526# @FUNCTION: has_hardened 541# DEAD FUNCS. Remove by Dec 2011.
527# @DESCRIPTION: 542test_flag() { die "$0: deprecated, please use test-flags()!" ; }
528# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
529has_hardened() {
530 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 543has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
531
532 test_version_info Hardened && return 0
533 # The specs file wont exist unless gcc has GCC_SPECS support
534 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
535}
536
537# @FUNCTION: has_pic
538# @DESCRIPTION:
539# DEPRECATED - use gcc-specs-pie from toolchain-funcs
540# indicate whether PIC is set
541has_pic() {
542 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 544has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
543
544 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
545 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
546 gcc-specs-pie
547}
548
549# @FUNCTION: has_pie
550# @DESCRIPTION:
551# DEPRECATED - use gcc-specs-pie from toolchain-funcs
552# indicate whether PIE is set
553has_pie() {
554 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 545has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
555
556 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
557 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
558 gcc-specs-pie
559}
560
561# @FUNCTION: has_ssp_all
562# @DESCRIPTION:
563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
564# indicate whether code for SSP is being generated for all functions
565has_ssp_all() {
566 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 546has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
567
568 # note; this matches only -fstack-protector-all
569 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
571 gcc-specs-ssp-to-all
572}
573
574# @FUNCTION: has_ssp
575# @DESCRIPTION:
576# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
577# indicate whether code for SSP is being generated
578has_ssp() {
579 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 547has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
580
581 # note; this matches both -fstack-protector and -fstack-protector-all
582 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
583 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
584 gcc-specs-ssp
585}
586 548
587# @FUNCTION: has_m64 549# @FUNCTION: has_m64
588# @DESCRIPTION: 550# @DESCRIPTION:
589# This doesn't test if the flag is accepted, it tests if the flag actually 551# This doesn't test if the flag is accepted, it tests if the flag actually
590# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 552# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
655 fi 617 fi
656 618
657 export CFLAGS CXXFLAGS 619 export CFLAGS CXXFLAGS
658} 620}
659 621
622# @FUNCTION: append-libs
623# @USAGE: <libs>
624# @DESCRIPTION:
625# Add extra <libs> to the current LIBS.
626append-libs() {
627 [[ $# -eq 0 ]] && return 0
628 local flag
629 for flag in "$@"; do
630 [[ ${flag} == -l* ]] && flag=${flag#-l}
631 export LIBS="${LIBS} -l${flag}"
632 done
633
634 return 0
635}
636
660# @FUNCTION: append-ldflags 637# @FUNCTION: append-ldflags
661# @USAGE: <flags> 638# @USAGE: <flags>
662# @DESCRIPTION: 639# @DESCRIPTION:
663# Add extra <flags> to the current LDFLAGS. 640# Add extra <flags> to the current LDFLAGS.
664append-ldflags() { 641append-ldflags() {
665 [[ -z $* ]] && return 0 642 [[ $# -eq 0 ]] && return 0
666 local flag 643 local flag
667 for flag in "$@"; do 644 for flag in "$@"; do
668 [[ ${flag} == -l* ]] && \ 645 [[ ${flag} == -l* ]] && \
669 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 646 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
670 done 647 done
681 _filter-var LDFLAGS "$@" 658 _filter-var LDFLAGS "$@"
682 return 0 659 return 0
683} 660}
684 661
685# @FUNCTION: raw-ldflags 662# @FUNCTION: raw-ldflags
686# @USAGE: <flags> 663# @USAGE: [flags]
687# @DESCRIPTION: 664# @DESCRIPTION:
688# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 665# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
689# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 666# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
690# to gcc where it needs the '-Wl,'. 667# to gcc where it needs the '-Wl,'.
668#
669# If no flags are specified, then default to ${LDFLAGS}.
691raw-ldflags() { 670raw-ldflags() {
692 local x input="$@" 671 local x input="$@"
693 [[ -z ${input} ]] && input=${LDFLAGS} 672 [[ -z ${input} ]] && input=${LDFLAGS}
694 set -- 673 set --
695 for x in ${input} ; do 674 for x in ${input} ; do
697 set -- "$@" ${x//,/ } 676 set -- "$@" ${x//,/ }
698 done 677 done
699 echo "$@" 678 echo "$@"
700} 679}
701 680
702# @FUNCTION: bindnow-flags 681# @FUNCTION: no-as-needed
703# @RETURN: Returns the flags to enable "now" binding in the current selected linker. 682# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
704# @DESCRIPTION: 683no-as-needed() {
705# DEPRECATED - Gets the flags needed for "NOW" binding 684 case $($(tc-getLD) -v 2>&1 </dev/null) in
706bindnow-flags() { 685 *GNU*) # GNU ld
707 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" 686 echo "-Wl,--no-as-needed" ;;
687 esac
708} 688}
709
710 689
711# Some tests for when we screw with things and want to make 690# Some tests for when we screw with things and want to make
712# sure we didn't break anything 691# sure we didn't break anything
713#TESTS() { 692#TESTS() {
714# CFLAGS="-a -b -c=1" 693# CFLAGS="-a -b -c=1"
731# [[ ${CXXFLAGS} == "-y -z=2" ]] || die 710# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
732# 711#
733# echo "All tests pass" 712# echo "All tests pass"
734#} 713#}
735#TESTS 714#TESTS
715
716fi

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