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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 1.163 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 # 4.5 59 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp" 60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
61 # 4.6
62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
60 63
61 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 64 export ALLOWED_FLAGS
62 # NOTE: currently -Os have issues with gcc3 and K6* arch's
63 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
64 return 0 65 return 0
65} 66}
66 67
67# inverted filters for hardened compiler. This is trying to unpick 68# inverted filters for hardened compiler. This is trying to unpick
68# the hardened compiler defaults. 69# the hardened compiler defaults.
125 126
126# @FUNCTION: filter-lfs-flags 127# @FUNCTION: filter-lfs-flags
127# @DESCRIPTION: 128# @DESCRIPTION:
128# Remove flags that enable Large File Support. 129# Remove flags that enable Large File Support.
129filter-lfs-flags() { 130filter-lfs-flags() {
130 [[ -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)
131 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
132} 137}
133 138
134# @FUNCTION: append-cppflags 139# @FUNCTION: append-cppflags
135# @USAGE: <flags> 140# @USAGE: <flags>
136# @DESCRIPTION: 141# @DESCRIPTION:
137# Add extra <flags> to the current CPPFLAGS. 142# Add extra <flags> to the current CPPFLAGS.
138append-cppflags() { 143append-cppflags() {
139 [[ -z $* ]] && return 0 144 [[ $# -eq 0 ]] && return 0
140 export CPPFLAGS="${CPPFLAGS} $*" 145 export CPPFLAGS="${CPPFLAGS} $*"
141 return 0 146 return 0
142} 147}
143 148
144# @FUNCTION: append-cflags 149# @FUNCTION: append-cflags
145# @USAGE: <flags> 150# @USAGE: <flags>
146# @DESCRIPTION: 151# @DESCRIPTION:
147# Add extra <flags> to the current CFLAGS. 152# Add extra <flags> to the current CFLAGS.
148append-cflags() { 153append-cflags() {
149 [[ -z $* ]] && return 0 154 [[ $# -eq 0 ]] && return 0
150 export CFLAGS="${CFLAGS} $*" 155 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
151 return 0 156 return 0
152} 157}
153 158
154# @FUNCTION: append-cxxflags 159# @FUNCTION: append-cxxflags
155# @USAGE: <flags> 160# @USAGE: <flags>
156# @DESCRIPTION: 161# @DESCRIPTION:
157# Add extra <flags> to the current CXXFLAGS. 162# Add extra <flags> to the current CXXFLAGS.
158append-cxxflags() { 163append-cxxflags() {
159 [[ -z $* ]] && return 0 164 [[ $# -eq 0 ]] && return 0
160 export CXXFLAGS="${CXXFLAGS} $*" 165 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
161 return 0 166 return 0
162} 167}
163 168
164# @FUNCTION: append-fflags 169# @FUNCTION: append-fflags
165# @USAGE: <flags> 170# @USAGE: <flags>
166# @DESCRIPTION: 171# @DESCRIPTION:
167# Add extra <flags> to the current {F,FC}FLAGS. 172# Add extra <flags> to the current {F,FC}FLAGS.
168append-fflags() { 173append-fflags() {
169 [[ -z $* ]] && return 0 174 [[ $# -eq 0 ]] && return 0
170 export FFLAGS="${FFLAGS} $*" 175 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
171 export FCFLAGS="${FCFLAGS} $*" 176 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
172 return 0 177 return 0
173} 178}
174 179
175# @FUNCTION: append-lfs-flags 180# @FUNCTION: append-lfs-flags
176# @DESCRIPTION: 181# @DESCRIPTION:
177# Add flags that enable Large File Support. 182# Add flags that enable Large File Support.
178append-lfs-flags() { 183append-lfs-flags() {
179 [[ -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
180 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
181} 187}
182 188
183# @FUNCTION: append-flags 189# @FUNCTION: append-flags
184# @USAGE: <flags> 190# @USAGE: <flags>
185# @DESCRIPTION: 191# @DESCRIPTION:
186# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 192# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
187append-flags() { 193append-flags() {
188 [[ -z $* ]] && return 0 194 [[ $# -eq 0 ]] && return 0
189 append-cflags "$@" 195 append-cflags "$@"
190 append-cxxflags "$@" 196 append-cxxflags "$@"
191 append-fflags "$@" 197 append-fflags "$@"
192 return 0 198 return 0
193} 199}
325 local NEW_CFLAGS="" 331 local NEW_CFLAGS=""
326 local NEW_CXXFLAGS="" 332 local NEW_CXXFLAGS=""
327 local NEW_FFLAGS="" 333 local NEW_FFLAGS=""
328 local NEW_FCFLAGS="" 334 local NEW_FCFLAGS=""
329 335
330 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
331 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
332 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
333 fi
334
335 set -f # disable pathname expansion 336 set -f # disable pathname expansion
336 337
337 for x in ${CFLAGS}; do 338 for x in ${CFLAGS}; do
338 for y in ${ALLOWED_FLAGS}; do 339 for y in ${ALLOWED_FLAGS}; do
339 flag=${x%%=*} 340 flag=${x%%=*}
399 400
400test-flag-PROG() { 401test-flag-PROG() {
401 local comp=$1 402 local comp=$1
402 local flags="$2" 403 local flags="$2"
403 404
404 [[ -z ${comp} || -z ${flags} ]] && \ 405 [[ -z ${comp} || -z ${flags} ]] && return 1
405 return 1
406 406
407 # use -c so we can test the assembler as well
407 local PROG=$(tc-get${comp}) 408 local PROG=$(tc-get${comp})
408 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 409 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
409 > /dev/null 2>&1 410 > /dev/null 2>&1
410} 411}
411 412
412# @FUNCTION: test-flag-CC 413# @FUNCTION: test-flag-CC
413# @USAGE: <flag> 414# @USAGE: <flag>
440 441
441 shift 442 shift
442 443
443 [[ -z ${comp} ]] && return 1 444 [[ -z ${comp} ]] && return 1
444 445
445 x=""
446 for x in "$@" ; do 446 for x in "$@" ; do
447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
448 done 448 done
449 449
450 echo "${flags}" 450 echo "${flags}"
481# @USAGE: <flags> 481# @USAGE: <flags>
482# @DESCRIPTION: 482# @DESCRIPTION:
483# Short-hand that should hopefully work for both C and C++ compiler, but 483# Short-hand that should hopefully work for both C and C++ compiler, but
484# its really only present due to the append-flags() abomination. 484# its really only present due to the append-flags() abomination.
485test-flags() { test-flags-CC "$@"; } 485test-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}
495 486
496# @FUNCTION: test_version_info 487# @FUNCTION: test_version_info
497# @USAGE: <version> 488# @USAGE: <version>
498# @DESCRIPTION: 489# @DESCRIPTION:
499# 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.
535 fi 526 fi
536 done 527 done
537 return 1 528 return 1
538} 529}
539 530
540# @FUNCTION: has_hardened 531# DEAD FUNCS. Remove by Dec 2011.
541# @DESCRIPTION: 532test_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 533has_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 534has_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 535has_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 536has_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 537has_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}
600 538
601# @FUNCTION: has_m64 539# @FUNCTION: has_m64
602# @DESCRIPTION: 540# @DESCRIPTION:
603# 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
604# 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
674# @FUNCTION: append-libs 612# @FUNCTION: append-libs
675# @USAGE: <libs> 613# @USAGE: <libs>
676# @DESCRIPTION: 614# @DESCRIPTION:
677# Add extra <libs> to the current LIBS. 615# Add extra <libs> to the current LIBS.
678append-libs() { 616append-libs() {
679 [[ -z $* ]] && return 0 617 [[ $# -eq 0 ]] && return 0
680 local flag 618 local flag
681 for flag in "$@"; do 619 for flag in "$@"; do
682 [[ ${flag} == -l* ]] && flag=${flag#-l} 620 [[ ${flag} == -l* ]] && flag=${flag#-l}
683 export LIBS="${LIBS} -l${flag}" 621 export LIBS="${LIBS} -l${flag}"
684 done 622 done
689# @FUNCTION: append-ldflags 627# @FUNCTION: append-ldflags
690# @USAGE: <flags> 628# @USAGE: <flags>
691# @DESCRIPTION: 629# @DESCRIPTION:
692# Add extra <flags> to the current LDFLAGS. 630# Add extra <flags> to the current LDFLAGS.
693append-ldflags() { 631append-ldflags() {
694 [[ -z $* ]] && return 0 632 [[ $# -eq 0 ]] && return 0
695 local flag 633 local flag
696 for flag in "$@"; do 634 for flag in "$@"; do
697 [[ ${flag} == -l* ]] && \ 635 [[ ${flag} == -l* ]] && \
698 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 636 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
699 done 637 done
710 _filter-var LDFLAGS "$@" 648 _filter-var LDFLAGS "$@"
711 return 0 649 return 0
712} 650}
713 651
714# @FUNCTION: raw-ldflags 652# @FUNCTION: raw-ldflags
715# @USAGE: <flags> 653# @USAGE: [flags]
716# @DESCRIPTION: 654# @DESCRIPTION:
717# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 655# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
718# 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
719# 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 ${LDFLAGS}.
720raw-ldflags() { 660raw-ldflags() {
721 local x input="$@" 661 local x input="$@"
722 [[ -z ${input} ]] && input=${LDFLAGS} 662 [[ -z ${input} ]] && input=${LDFLAGS}
723 set -- 663 set --
724 for x in ${input} ; do 664 for x in ${input} ; do
735 *GNU*) # GNU ld 675 *GNU*) # GNU ld
736 echo "-Wl,--no-as-needed" ;; 676 echo "-Wl,--no-as-needed" ;;
737 esac 677 esac
738} 678}
739 679
740# Some tests for when we screw with things and want to make 680fi
741# sure we didn't break anything
742#TESTS() {
743# CFLAGS="-a -b -c=1"
744# CXXFLAGS="-x -y -z=2"
745# LDFLAGS="-l -m -n=3"
746#
747# die() { exit 1; }
748# (is-flag 1 2 3) && die
749# (is-ldflag 1 2 3) && die
750#
751# is-flagq -l && die
752# is-ldflagq -a && die
753# is-flagq -a || die
754# is-flagq -x || die
755# is-ldflagq -n=* || die
756# is-ldflagq -n && die
757#
758# strip-unsupported-flags
759# [[ ${CFLAGS} == "-c=1" ]] || die
760# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
761#
762# echo "All tests pass"
763#}
764#TESTS

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