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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 1.147 2010/04/02 02:50:29 abcd Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.163 2011/12/28 06:28:55 dirtyepic 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
27 30
28 31
29# {C,CXX,F,FC}FLAGS that we allow in strip-flags 32# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed 33# Note: shell globs and character lists are allowed
31setup-allowed-flags() { 34setup-allowed-flags() {
32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
33 export ALLOWED_FLAGS="-pipe" 35 ALLOWED_FLAGS="-pipe"
34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 36 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 37 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow" 38 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 39 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 40 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 41 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" 42 ALLOWED_FLAGS+=" -W* -w"
41 fi 43
42 # allow a bunch of flags that negate features / control ABI 44 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 45 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer" 46 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47 -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 48 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \ 49 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \ 50 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
48 -mno-popcnt -mno-abm \
49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \ 51 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 -mieee -mieee-with-inexact -mschedule \ 53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
56 -msecure-plt -m*-toc -D* -U*"
57 58
58 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 59 # 4.5
59 # NOTE: currently -Os have issues with gcc3 and K6* arch's 60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 61 # 4.6
62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
63
64 export ALLOWED_FLAGS
61 return 0 65 return 0
62} 66}
63 67
64# inverted filters for hardened compiler. This is trying to unpick 68# inverted filters for hardened compiler. This is trying to unpick
65# the hardened compiler defaults. 69# the hardened compiler defaults.
122 126
123# @FUNCTION: filter-lfs-flags 127# @FUNCTION: filter-lfs-flags
124# @DESCRIPTION: 128# @DESCRIPTION:
125# Remove flags that enable Large File Support. 129# Remove flags that enable Large File Support.
126filter-lfs-flags() { 130filter-lfs-flags() {
127 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 131 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
132 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
133 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
134 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
135 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
128 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 136 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
129} 137}
130 138
131# @FUNCTION: append-cppflags 139# @FUNCTION: append-cppflags
132# @USAGE: <flags> 140# @USAGE: <flags>
133# @DESCRIPTION: 141# @DESCRIPTION:
134# Add extra <flags> to the current CPPFLAGS. 142# Add extra <flags> to the current CPPFLAGS.
135append-cppflags() { 143append-cppflags() {
136 [[ -z $* ]] && return 0 144 [[ $# -eq 0 ]] && return 0
137 export CPPFLAGS="${CPPFLAGS} $*" 145 export CPPFLAGS="${CPPFLAGS} $*"
138 return 0 146 return 0
139} 147}
140 148
141# @FUNCTION: append-cflags 149# @FUNCTION: append-cflags
142# @USAGE: <flags> 150# @USAGE: <flags>
143# @DESCRIPTION: 151# @DESCRIPTION:
144# Add extra <flags> to the current CFLAGS. 152# Add extra <flags> to the current CFLAGS.
145append-cflags() { 153append-cflags() {
146 [[ -z $* ]] && return 0 154 [[ $# -eq 0 ]] && return 0
147 export CFLAGS="${CFLAGS} $*" 155 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
148 return 0 156 return 0
149} 157}
150 158
151# @FUNCTION: append-cxxflags 159# @FUNCTION: append-cxxflags
152# @USAGE: <flags> 160# @USAGE: <flags>
153# @DESCRIPTION: 161# @DESCRIPTION:
154# Add extra <flags> to the current CXXFLAGS. 162# Add extra <flags> to the current CXXFLAGS.
155append-cxxflags() { 163append-cxxflags() {
156 [[ -z $* ]] && return 0 164 [[ $# -eq 0 ]] && return 0
157 export CXXFLAGS="${CXXFLAGS} $*" 165 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
158 return 0 166 return 0
159} 167}
160 168
161# @FUNCTION: append-fflags 169# @FUNCTION: append-fflags
162# @USAGE: <flags> 170# @USAGE: <flags>
163# @DESCRIPTION: 171# @DESCRIPTION:
164# Add extra <flags> to the current {F,FC}FLAGS. 172# Add extra <flags> to the current {F,FC}FLAGS.
165append-fflags() { 173append-fflags() {
166 [[ -z $* ]] && return 0 174 [[ $# -eq 0 ]] && return 0
167 export FFLAGS="${FFLAGS} $*" 175 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
168 export FCFLAGS="${FCFLAGS} $*" 176 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
169 return 0 177 return 0
170} 178}
171 179
172# @FUNCTION: append-lfs-flags 180# @FUNCTION: append-lfs-flags
173# @DESCRIPTION: 181# @DESCRIPTION:
174# Add flags that enable Large File Support. 182# Add flags that enable Large File Support.
175append-lfs-flags() { 183append-lfs-flags() {
176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 184 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
185 # see comments in filter-lfs-flags func for meaning of these
177 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 186 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178} 187}
179 188
180# @FUNCTION: append-flags 189# @FUNCTION: append-flags
181# @USAGE: <flags> 190# @USAGE: <flags>
182# @DESCRIPTION: 191# @DESCRIPTION:
183# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 192# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
184append-flags() { 193append-flags() {
185 [[ -z $* ]] && return 0 194 [[ $# -eq 0 ]] && return 0
186 append-cflags "$@" 195 append-cflags "$@"
187 append-cxxflags "$@" 196 append-cxxflags "$@"
188 append-fflags "$@" 197 append-fflags "$@"
189 return 0 198 return 0
190} 199}
322 local NEW_CFLAGS="" 331 local NEW_CFLAGS=""
323 local NEW_CXXFLAGS="" 332 local NEW_CXXFLAGS=""
324 local NEW_FFLAGS="" 333 local NEW_FFLAGS=""
325 local NEW_FCFLAGS="" 334 local NEW_FCFLAGS=""
326 335
327 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
328 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
329 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
330 fi
331
332 set -f # disable pathname expansion 336 set -f # disable pathname expansion
333 337
334 for x in ${CFLAGS}; do 338 for x in ${CFLAGS}; do
335 for y in ${ALLOWED_FLAGS}; do 339 for y in ${ALLOWED_FLAGS}; do
336 flag=${x%%=*} 340 flag=${x%%=*}
396 400
397test-flag-PROG() { 401test-flag-PROG() {
398 local comp=$1 402 local comp=$1
399 local flags="$2" 403 local flags="$2"
400 404
401 [[ -z ${comp} || -z ${flags} ]] && \ 405 [[ -z ${comp} || -z ${flags} ]] && return 1
402 return 1
403 406
407 # use -c so we can test the assembler as well
404 local PROG=$(tc-get${comp}) 408 local PROG=$(tc-get${comp})
405 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 409 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
406 > /dev/null 2>&1 410 > /dev/null 2>&1
407} 411}
408 412
409# @FUNCTION: test-flag-CC 413# @FUNCTION: test-flag-CC
410# @USAGE: <flag> 414# @USAGE: <flag>
437 441
438 shift 442 shift
439 443
440 [[ -z ${comp} ]] && return 1 444 [[ -z ${comp} ]] && return 1
441 445
442 x=""
443 for x in "$@" ; do 446 for x in "$@" ; do
444 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
445 done 448 done
446 449
447 echo "${flags}" 450 echo "${flags}"
478# @USAGE: <flags> 481# @USAGE: <flags>
479# @DESCRIPTION: 482# @DESCRIPTION:
480# Short-hand that should hopefully work for both C and C++ compiler, but 483# Short-hand that should hopefully work for both C and C++ compiler, but
481# its really only present due to the append-flags() abomination. 484# its really only present due to the append-flags() abomination.
482test-flags() { test-flags-CC "$@"; } 485test-flags() { test-flags-CC "$@"; }
483
484# @FUNCTION: test_flag
485# @DESCRIPTION:
486# DEPRICIATED, use test-flags()
487test_flag() {
488 ewarn "test_flag: deprecated, please use test-flags()!" >&2
489
490 test-flags-CC "$@"
491}
492 486
493# @FUNCTION: test_version_info 487# @FUNCTION: test_version_info
494# @USAGE: <version> 488# @USAGE: <version>
495# @DESCRIPTION: 489# @DESCRIPTION:
496# Returns shell true if the current C compiler version matches <version>, else returns shell false. 490# Returns shell true if the current C compiler version matches <version>, else returns shell false.
532 fi 526 fi
533 done 527 done
534 return 1 528 return 1
535} 529}
536 530
537# @FUNCTION: has_hardened 531# DEAD FUNCS. Remove by Dec 2011.
538# @DESCRIPTION: 532test_flag() { die "$0: deprecated, please use test-flags()!" ; }
539# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
540has_hardened() {
541 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 533has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
542
543 test_version_info Hardened && return 0
544 # The specs file wont exist unless gcc has GCC_SPECS support
545 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
546}
547
548# @FUNCTION: has_pic
549# @DESCRIPTION:
550# DEPRECATED - use gcc-specs-pie from toolchain-funcs
551# indicate whether PIC is set
552has_pic() {
553 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 534has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
554
555 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
556 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
557 gcc-specs-pie
558}
559
560# @FUNCTION: has_pie
561# @DESCRIPTION:
562# DEPRECATED - use gcc-specs-pie from toolchain-funcs
563# indicate whether PIE is set
564has_pie() {
565 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 535has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
566
567 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
568 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
569 gcc-specs-pie
570}
571
572# @FUNCTION: has_ssp_all
573# @DESCRIPTION:
574# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
575# indicate whether code for SSP is being generated for all functions
576has_ssp_all() {
577 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 536has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
578
579 # note; this matches only -fstack-protector-all
580 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
581 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
582 gcc-specs-ssp-to-all
583}
584
585# @FUNCTION: has_ssp
586# @DESCRIPTION:
587# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
588# indicate whether code for SSP is being generated
589has_ssp() {
590 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 537has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
591
592 # note; this matches both -fstack-protector and -fstack-protector-all
593 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
594 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
595 gcc-specs-ssp
596}
597 538
598# @FUNCTION: has_m64 539# @FUNCTION: has_m64
599# @DESCRIPTION: 540# @DESCRIPTION:
600# This doesn't test if the flag is accepted, it tests if the flag actually 541# This doesn't test if the flag is accepted, it tests if the flag actually
601# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 542# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
671# @FUNCTION: append-libs 612# @FUNCTION: append-libs
672# @USAGE: <libs> 613# @USAGE: <libs>
673# @DESCRIPTION: 614# @DESCRIPTION:
674# Add extra <libs> to the current LIBS. 615# Add extra <libs> to the current LIBS.
675append-libs() { 616append-libs() {
676 [[ -z $* ]] && return 0 617 [[ $# -eq 0 ]] && return 0
677 local flag 618 local flag
678 for flag in "$@"; do 619 for flag in "$@"; do
679 [[ ${flag} == -l* ]] && flag=${flag#-l} 620 [[ ${flag} == -l* ]] && flag=${flag#-l}
680 export LIBS="${LIBS} -l${flag}" 621 export LIBS="${LIBS} -l${flag}"
681 done 622 done
686# @FUNCTION: append-ldflags 627# @FUNCTION: append-ldflags
687# @USAGE: <flags> 628# @USAGE: <flags>
688# @DESCRIPTION: 629# @DESCRIPTION:
689# Add extra <flags> to the current LDFLAGS. 630# Add extra <flags> to the current LDFLAGS.
690append-ldflags() { 631append-ldflags() {
691 [[ -z $* ]] && return 0 632 [[ $# -eq 0 ]] && return 0
692 local flag 633 local flag
693 for flag in "$@"; do 634 for flag in "$@"; do
694 [[ ${flag} == -l* ]] && \ 635 [[ ${flag} == -l* ]] && \
695 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 636 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
696 done 637 done
707 _filter-var LDFLAGS "$@" 648 _filter-var LDFLAGS "$@"
708 return 0 649 return 0
709} 650}
710 651
711# @FUNCTION: raw-ldflags 652# @FUNCTION: raw-ldflags
712# @USAGE: <flags> 653# @USAGE: [flags]
713# @DESCRIPTION: 654# @DESCRIPTION:
714# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 655# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
715# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 656# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
716# to gcc where it needs the '-Wl,'. 657# to gcc where it needs the '-Wl,'.
658#
659# If no flags are specified, then default to ${LDFLAGS}.
717raw-ldflags() { 660raw-ldflags() {
718 local x input="$@" 661 local x input="$@"
719 [[ -z ${input} ]] && input=${LDFLAGS} 662 [[ -z ${input} ]] && input=${LDFLAGS}
720 set -- 663 set --
721 for x in ${input} ; do 664 for x in ${input} ; do
732 *GNU*) # GNU ld 675 *GNU*) # GNU ld
733 echo "-Wl,--no-as-needed" ;; 676 echo "-Wl,--no-as-needed" ;;
734 esac 677 esac
735} 678}
736 679
737# Some tests for when we screw with things and want to make 680fi
738# sure we didn't break anything
739#TESTS() {
740# CFLAGS="-a -b -c=1"
741# CXXFLAGS="-x -y -z=2"
742# LDFLAGS="-l -m -n=3"
743#
744# die() { exit 1; }
745# (is-flag 1 2 3) && die
746# (is-ldflag 1 2 3) && die
747#
748# is-flagq -l && die
749# is-ldflagq -a && die
750# is-flagq -a || die
751# is-flagq -x || die
752# is-ldflagq -n=* || die
753# is-ldflagq -n && die
754#
755# strip-unsupported-flags
756# [[ ${CFLAGS} == "-c=1" ]] || die
757# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
758#
759# echo "All tests pass"
760#}
761#TESTS

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