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1# Copyright 1999-2009 Gentoo Foundation 1# Copyright 1999-2012 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 1.129 2009/01/04 17:22:16 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.173 2012/05/31 00:29:06 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 12
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
13inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
14 17
15################ DEPRECATED functions ################ 18# Return all the flag variables that our high level funcs operate on.
16# The following are still present to avoid breaking existing 19all-flag-vars() {
17# code more than necessary; however they are deprecated. Please 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
18# use gcc-specs-* from toolchain-funcs.eclass instead, if you 21}
19# need to know which hardened techs are active in the compiler.
20# See bug #100974
21#
22# has_hardened
23# has_pie
24# has_pic
25# has_ssp_all
26# has_ssp
27
28 22
29# {C,CXX,F,FC}FLAGS that we allow in strip-flags 23# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed 24# Note: shell globs and character lists are allowed
31setup-allowed-flags() { 25setup-allowed-flags() {
32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
33 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" 33 ALLOWED_FLAGS+=" -W* -w"
41 fi 34
42 # allow a bunch of flags that negate features / control ABI 35 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow" 37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \ 44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
54 -msecure-plt -m*-toc -D* -U*"
55 49
56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 50 # 4.5
57 # NOTE: currently -Os have issues with gcc3 and K6* arch's 51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 52 # 4.6
53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
54
55 export ALLOWED_FLAGS
59 return 0 56 return 0
60} 57}
61 58
62# inverted filters for hardened compiler. This is trying to unpick 59# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults. 60# the hardened compiler defaults.
71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 68 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72 gcc-specs-pie || continue 69 gcc-specs-pie || continue
73 is-flagq -nopie || append-flags -nopie;; 70 is-flagq -nopie || append-flags -nopie;;
74 -fstack-protector) 71 -fstack-protector)
75 gcc-specs-ssp || continue 72 gcc-specs-ssp || continue
76 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 73 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
77 -fstack-protector-all) 74 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue 75 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 76 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
80 -fno-strict-overflow) 77 -fno-strict-overflow)
81 gcc-specs-nostrict || continue 78 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags -fstrict-overflow;; 79 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
83 esac 80 esac
84 done 81 done
85} 82}
86 83
87# Remove occurrences of strings from variable given in $1 84# Remove occurrences of strings from variable given in $1
88# Strings removed are matched as globs, so for example 85# Strings removed are matched as globs, so for example
89# '-O*' would remove -O1, -O2 etc. 86# '-O*' would remove -O1, -O2 etc.
90_filter-var() { 87_filter-var() {
91 local f x VAR VAL 88 local f x var=$1 new=()
92 declare -a new
93
94 VAR=$1
95 shift 89 shift
96 eval VAL=\${${VAR}} 90
97 for f in ${VAL}; do 91 for f in ${!var} ; do
98 for x in "$@"; do 92 for x in "$@" ; do
99 # Note this should work with globs like -O* 93 # Note this should work with globs like -O*
100 [[ ${f} == ${x} ]] && continue 2 94 [[ ${f} == ${x} ]] && continue 2
101 done 95 done
102 eval new\[\${\#new\[@]}]=\${f} 96 new+=( "${f}" )
103 done 97 done
104 eval export ${VAR}=\${new\[*]} 98 eval export ${var}=\""${new[*]}"\"
105} 99}
106 100
107# @FUNCTION: filter-flags 101# @FUNCTION: filter-flags
108# @USAGE: <flags> 102# @USAGE: <flags>
109# @DESCRIPTION: 103# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs. 104# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
111filter-flags() { 105filter-flags() {
112 _filter-hardened "$@" 106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
113 _filter-var CFLAGS "$@" 109 _filter-var ${v} "$@"
114 _filter-var CPPFLAGS "$@" 110 done
115 _filter-var CXXFLAGS "$@"
116 _filter-var FFLAGS "$@"
117 _filter-var FCFLAGS "$@"
118 return 0 111 return 0
119} 112}
120 113
121# @FUNCTION: filter-lfs-flags 114# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION: 115# @DESCRIPTION:
123# Remove flags that enable Large File Support. 116# Remove flags that enable Large File Support.
124filter-lfs-flags() { 117filter-lfs-flags() {
125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124}
125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
127} 133}
128 134
129# @FUNCTION: append-cppflags 135# @FUNCTION: append-cppflags
130# @USAGE: <flags> 136# @USAGE: <flags>
131# @DESCRIPTION: 137# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS. 138# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() { 139append-cppflags() {
134 [[ -z $* ]] && return 0 140 [[ $# -eq 0 ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*" 141 export CPPFLAGS="${CPPFLAGS} $*"
142 return 0
143}
144
145# @FUNCTION: append-cflags
146# @USAGE: <flags>
147# @DESCRIPTION:
148# Add extra <flags> to the current CFLAGS.
149append-cflags() {
150 [[ $# -eq 0 ]] && return 0
151 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
152 return 0
153}
154
155# @FUNCTION: append-cxxflags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to the current CXXFLAGS.
159append-cxxflags() {
160 [[ $# -eq 0 ]] && return 0
161 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
136 return 0 162 return 0
137} 163}
138 164
139# @FUNCTION: append-fflags 165# @FUNCTION: append-fflags
140# @USAGE: <flags> 166# @USAGE: <flags>
141# @DESCRIPTION: 167# @DESCRIPTION:
142# Add extra <flags> to the current {F,FC}FLAGS. 168# Add extra <flags> to the current {F,FC}FLAGS.
143append-fflags() { 169append-fflags() {
144 [[ -z $* ]] && return 0 170 [[ $# -eq 0 ]] && return 0
145 export FFLAGS="${FFLAGS} $*" 171 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
146 export FCFLAGS="${FCFLAGS} $*" 172 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
147 return 0 173 return 0
148} 174}
149 175
150# @FUNCTION: append-lfs-flags 176# @FUNCTION: append-lfs-flags
151# @DESCRIPTION: 177# @DESCRIPTION:
152# Add flags that enable Large File Support. 178# Add flags that enable Large File Support.
153append-lfs-flags() { 179append-lfs-flags() {
154 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 180 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
181 # see comments in filter-lfs-flags func for meaning of these
155 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 182 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
183}
184
185# @FUNCTION: append-ldflags
186# @USAGE: <flags>
187# @DESCRIPTION:
188# Add extra <flags> to the current LDFLAGS.
189append-ldflags() {
190 [[ $# -eq 0 ]] && return 0
191 local flag
192 for flag in "$@"; do
193 [[ ${flag} == -l* ]] && \
194 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
195 done
196
197 export LDFLAGS="${LDFLAGS} $*"
198 return 0
156} 199}
157 200
158# @FUNCTION: append-flags 201# @FUNCTION: append-flags
159# @USAGE: <flags> 202# @USAGE: <flags>
160# @DESCRIPTION: 203# @DESCRIPTION:
161# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
162append-flags() { 205append-flags() {
163 [[ -z $* ]] && return 0 206 [[ $# -eq 0 ]] && return 0
164 export CFLAGS="${CFLAGS} $*" 207 case " $* " in
165 export CXXFLAGS="${CXXFLAGS} $*" 208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
166 export FFLAGS="${FFLAGS} $*" 209 *' '-L*|\
167 export FCFLAGS="${FCFLAGS} $*" 210 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
211 esac
212 append-cflags "$@"
213 append-cxxflags "$@"
214 append-fflags "$@"
168 return 0 215 return 0
169} 216}
170 217
171# @FUNCTION: replace-flags 218# @FUNCTION: replace-flags
172# @USAGE: <old> <new> 219# @USAGE: <old> <new>
173# @DESCRIPTION: 220# @DESCRIPTION:
174# Replace the <old> flag with <new>. Accepts shell globs for <old>. 221# Replace the <old> flag with <new>. Accepts shell globs for <old>.
175replace-flags() { 222replace-flags() {
176 [[ $# != 2 ]] \
177 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 223 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
178 && die "replace-flags takes 2 arguments, not $#"
179 224
180 local f fset 225 local f var new
181 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 226 for var in $(all-flag-vars) ; do
182
183 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
184 # Looping over the flags instead of using a global 227 # Looping over the flags instead of using a global
185 # substitution ensures that we're working with flag atoms. 228 # substitution ensures that we're working with flag atoms.
186 # Otherwise globs like -O* have the potential to wipe out the 229 # Otherwise globs like -O* have the potential to wipe out the
187 # list of flags. 230 # list of flags.
231 new=()
188 for f in ${!fset}; do 232 for f in ${!var} ; do
189 # Note this should work with globs like -O* 233 # Note this should work with globs like -O*
190 [[ ${f} == ${1} ]] && f=${2} 234 [[ ${f} == ${1} ]] && f=${2}
191 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 235 new+=( "${f}" )
192 done 236 done
193 eval export ${fset}=\${new_${fset}\[*]} 237 eval export ${var}=\""${new[*]}"\"
194 done 238 done
195 239
196 return 0 240 return 0
197} 241}
198 242
226# @USAGE: <flag> 270# @USAGE: <flag>
227# @DESCRIPTION: 271# @DESCRIPTION:
228# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. 272# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
229is-flagq() { 273is-flagq() {
230 [[ -n $2 ]] && die "Usage: is-flag <flag>" 274 [[ -n $2 ]] && die "Usage: is-flag <flag>"
231 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1 275
276 local var
277 for var in $(all-flag-vars) ; do
278 _is_flagq ${var} "$1" && return 0
279 done
280 return 1
232} 281}
233 282
234# @FUNCTION: is-flag 283# @FUNCTION: is-flag
235# @USAGE: <flag> 284# @USAGE: <flag>
236# @DESCRIPTION: 285# @DESCRIPTION:
292 341
293# @FUNCTION: strip-flags 342# @FUNCTION: strip-flags
294# @DESCRIPTION: 343# @DESCRIPTION:
295# Strip C[XX]FLAGS of everything except known good/safe flags. 344# Strip C[XX]FLAGS of everything except known good/safe flags.
296strip-flags() { 345strip-flags() {
297 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 346 local x y var
298 347
299 setup-allowed-flags 348 setup-allowed-flags
300 349
301 local NEW_CFLAGS=""
302 local NEW_CXXFLAGS=""
303 local NEW_FFLAGS=""
304 local NEW_FCFLAGS=""
305
306 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
307 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
308 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
309 fi
310
311 set -f # disable pathname expansion 350 set -f # disable pathname expansion
312 351
313 for x in ${CFLAGS}; do 352 for var in $(all-flag-vars) ; do
353 local new=()
354
355 for x in ${!var} ; do
356 local flag=${x%%=*}
314 for y in ${ALLOWED_FLAGS}; do 357 for y in ${ALLOWED_FLAGS} ; do
315 flag=${x%%=*}
316 if [ "${flag%%${y}}" = "" ] ; then 358 if [[ -z ${flag%%${y}} ]] ; then
317 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 359 new+=( "${x}" )
318 break 360 break
319 fi 361 fi
320 done 362 done
321 done 363 done
322 364
323 for x in ${CXXFLAGS}; do
324 for y in ${ALLOWED_FLAGS}; do
325 flag=${x%%=*}
326 if [ "${flag%%${y}}" = "" ] ; then
327 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
328 break
329 fi
330 done
331 done
332
333 for x in ${FFLAGS}; do
334 for y in ${ALLOWED_FLAGS}; do
335 flag=${x%%=*}
336 if [ "${flag%%${y}}" = "" ] ; then
337 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
338 break
339 fi
340 done
341 done
342
343 for x in ${FCFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 # In case we filtered out all optimization flags fallback to -O2 365 # In case we filtered out all optimization flags fallback to -O2
354 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 366 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
355 NEW_CFLAGS="${NEW_CFLAGS} -O2" 367 new+=( -O2 )
356 fi 368 fi
357 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 369
358 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 370 eval export ${var}=\""${new[*]}"\"
359 fi 371 done
360 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
361 NEW_FFLAGS="${NEW_FFLAGS} -O2"
362 fi
363 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
364 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
365 fi
366 372
367 set +f # re-enable pathname expansion 373 set +f # re-enable pathname expansion
368 374
369 export CFLAGS="${NEW_CFLAGS}"
370 export CXXFLAGS="${NEW_CXXFLAGS}"
371 export FFLAGS="${NEW_FFLAGS}"
372 export FCFLAGS="${NEW_FCFLAGS}"
373 return 0 375 return 0
374} 376}
375 377
376test-flag-PROG() { 378test-flag-PROG() {
377 local comp=$1 379 local comp=$1
378 local flags="$2" 380 local flag=$2
379 381
380 [[ -z ${comp} || -z ${flags} ]] && \ 382 [[ -z ${comp} || -z ${flag} ]] && return 1
381 return 1
382 383
384 # use -c so we can test the assembler as well
383 local PROG=$(tc-get${comp}) 385 local PROG=$(tc-get${comp})
384 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 386 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
385 > /dev/null 2>&1 387 > /dev/null 2>&1
386} 388}
387 389
388# @FUNCTION: test-flag-CC 390# @FUNCTION: test-flag-CC
389# @USAGE: <flag> 391# @USAGE: <flag>
416 418
417 shift 419 shift
418 420
419 [[ -z ${comp} ]] && return 1 421 [[ -z ${comp} ]] && return 1
420 422
421 x=""
422 for x in "$@" ; do 423 for x in "$@" ; do
423 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 424 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
424 done 425 done
425 426
426 echo "${flags}" 427 echo "${flags}"
457# @USAGE: <flags> 458# @USAGE: <flags>
458# @DESCRIPTION: 459# @DESCRIPTION:
459# Short-hand that should hopefully work for both C and C++ compiler, but 460# Short-hand that should hopefully work for both C and C++ compiler, but
460# its really only present due to the append-flags() abomination. 461# its really only present due to the append-flags() abomination.
461test-flags() { test-flags-CC "$@"; } 462test-flags() { test-flags-CC "$@"; }
462
463# @FUNCTION: test_flag
464# @DESCRIPTION:
465# DEPRICIATED, use test-flags()
466test_flag() {
467 ewarn "test_flag: deprecated, please use test-flags()!" >&2
468
469 test-flags-CC "$@"
470}
471 463
472# @FUNCTION: test_version_info 464# @FUNCTION: test_version_info
473# @USAGE: <version> 465# @USAGE: <version>
474# @DESCRIPTION: 466# @DESCRIPTION:
475# Returns shell true if the current C compiler version matches <version>, else returns shell false. 467# Returns shell true if the current C compiler version matches <version>, else returns shell false.
495# @FUNCTION: get-flag 487# @FUNCTION: get-flag
496# @USAGE: <flag> 488# @USAGE: <flag>
497# @DESCRIPTION: 489# @DESCRIPTION:
498# Find and echo the value for a particular flag. Accepts shell globs. 490# Find and echo the value for a particular flag. Accepts shell globs.
499get-flag() { 491get-flag() {
500 local f findflag="$1" 492 local f var findflag="$1"
501 493
502 # this code looks a little flaky but seems to work for 494 # this code looks a little flaky but seems to work for
503 # everything we want ... 495 # everything we want ...
504 # for example, if CFLAGS="-march=i686": 496 # for example, if CFLAGS="-march=i686":
505 # `get-flag -march` == "-march=i686" 497 # `get-flag -march` == "-march=i686"
506 # `get-flag march` == "i686" 498 # `get-flag march` == "i686"
507 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 499 for var in $(all-flag-vars) ; do
500 for f in ${!var} ; do
508 if [ "${f/${findflag}}" != "${f}" ] ; then 501 if [ "${f/${findflag}}" != "${f}" ] ; then
509 printf "%s\n" "${f/-${findflag}=}" 502 printf "%s\n" "${f/-${findflag}=}"
510 return 0 503 return 0
511 fi 504 fi
505 done
512 done 506 done
513 return 1 507 return 1
514}
515
516# @FUNCTION: has_hardened
517# @DESCRIPTION:
518# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
519has_hardened() {
520 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
521
522 test_version_info Hardened && return 0
523 # The specs file wont exist unless gcc has GCC_SPECS support
524 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
525}
526
527# @FUNCTION: has_pic
528# @DESCRIPTION:
529# DEPRECATED - use gcc-specs-pie from toolchain-funcs
530# indicate whether PIC is set
531has_pic() {
532 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
533
534 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
535 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
536 gcc-specs-pie
537}
538
539# @FUNCTION: has_pie
540# @DESCRIPTION:
541# DEPRECATED - use gcc-specs-pie from toolchain-funcs
542# indicate whether PIE is set
543has_pie() {
544 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
545
546 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
547 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
548 gcc-specs-pie
549}
550
551# @FUNCTION: has_ssp_all
552# @DESCRIPTION:
553# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
554# indicate whether code for SSP is being generated for all functions
555has_ssp_all() {
556 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
557
558 # note; this matches only -fstack-protector-all
559 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
560 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
561 gcc-specs-ssp-all
562}
563
564# @FUNCTION: has_ssp
565# @DESCRIPTION:
566# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
567# indicate whether code for SSP is being generated
568has_ssp() {
569 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
570
571 # note; this matches both -fstack-protector and -fstack-protector-all
572 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
573 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
574 gcc-specs-ssp
575} 508}
576 509
577# @FUNCTION: has_m64 510# @FUNCTION: has_m64
578# @DESCRIPTION: 511# @DESCRIPTION:
579# This doesn't test if the flag is accepted, it tests if the flag actually 512# This doesn't test if the flag is accepted, it tests if the flag actually
580# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 513# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
581# return code is 0, else the return code is 1. 514# return code is 0, else the return code is 1.
582has_m64() { 515has_m64() {
516 eqawarn "${FUNCNAME}: don't use this anymore"
517
583 # this doesnt test if the flag is accepted, it tests if the flag 518 # this doesnt test if the flag is accepted, it tests if the flag
584 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 519 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
585 # please dont replace this function with test_flag in some future 520 # please dont replace this function with test_flag in some future
586 # clean-up! 521 # clean-up!
587 522
593 rm -f "${temp}".c 528 rm -f "${temp}".c
594 [[ ${ret} != 1 ]] && return 0 529 [[ ${ret} != 1 ]] && return 0
595 return 1 530 return 1
596} 531}
597 532
598# @FUNCTION: has_m32
599# @DESCRIPTION:
600# This doesn't test if the flag is accepted, it tests if the flag actually
601# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
602# code is 0, else return code is 1.
603has_m32() { 533has_m32() {
604 # this doesnt test if the flag is accepted, it tests if the flag 534 die "${FUNCNAME}: don't use this anymore"
605 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
606 # please dont replace this function with test_flag in some future
607 # clean-up!
608
609 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
610
611 local temp=$(emktemp)
612 echo "int main() { return(0); }" > "${temp}".c
613 MY_CC=$(tc-getCC)
614 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
615 local ret=$?
616 rm -f "${temp}".c
617 [[ ${ret} != 1 ]] && return 0
618 return 1
619} 535}
620 536
621# @FUNCTION: replace-sparc64-flags 537# @FUNCTION: replace-sparc64-flags
622# @DESCRIPTION: 538# @DESCRIPTION:
623# Sets mcpu to v8 and uses the original value as mtune if none specified. 539# Sets mcpu to v8 and uses the original value as mtune if none specified.
645 fi 561 fi
646 562
647 export CFLAGS CXXFLAGS 563 export CFLAGS CXXFLAGS
648} 564}
649 565
650# @FUNCTION: append-ldflags 566# @FUNCTION: append-libs
651# @USAGE: <flags> 567# @USAGE: <libs>
652# @DESCRIPTION: 568# @DESCRIPTION:
653# Add extra <flags> to the current LDFLAGS. 569# Add extra <libs> to the current LIBS.
654append-ldflags() { 570append-libs() {
655 [[ -z $* ]] && return 0 571 [[ $# -eq 0 ]] && return 0
656 local flag 572 local flag
657 for flag in "$@"; do 573 for flag in "$@"; do
658 [[ ${flag} == -l* ]] && \ 574 [[ ${flag} == -l* ]] && flag=${flag#-l}
659 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 575 export LIBS="${LIBS} -l${flag}"
660 done 576 done
661 577
662 export LDFLAGS="${LDFLAGS} $*"
663 return 0
664}
665
666# @FUNCTION: filter-ldflags
667# @USAGE: <flags>
668# @DESCRIPTION:
669# Remove particular <flags> from LDFLAGS. Accepts shell globs.
670filter-ldflags() {
671 _filter-var LDFLAGS "$@"
672 return 0 578 return 0
673} 579}
674 580
675# @FUNCTION: raw-ldflags 581# @FUNCTION: raw-ldflags
676# @USAGE: <flags> 582# @USAGE: [flags]
677# @DESCRIPTION: 583# @DESCRIPTION:
678# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 584# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
679# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 585# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
680# to gcc where it needs the '-Wl,'. 586# to gcc where it needs the '-Wl,'.
587#
588# If no flags are specified, then default to ${LDFLAGS}.
681raw-ldflags() { 589raw-ldflags() {
682 local x input="$@" 590 local x input="$@"
683 [[ -z ${input} ]] && input=${LDFLAGS} 591 [[ -z ${input} ]] && input=${LDFLAGS}
684 set -- 592 set --
685 for x in ${input} ; do 593 for x in ${input} ; do
687 set -- "$@" ${x//,/ } 595 set -- "$@" ${x//,/ }
688 done 596 done
689 echo "$@" 597 echo "$@"
690} 598}
691 599
692# @FUNCTION: bindnow-flags 600# @FUNCTION: no-as-needed
693# @RETURN: Returns the flags to enable "now" binding in the current selected linker. 601# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
694# @DESCRIPTION: 602no-as-needed() {
695# DEPRECATED - Gets the flags needed for "NOW" binding 603 case $($(tc-getLD) -v 2>&1 </dev/null) in
696bindnow-flags() { 604 *GNU*) # GNU ld
697 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" 605 echo "-Wl,--no-as-needed" ;;
606 esac
698} 607}
699 608
700 609fi
701# Some tests for when we screw with things and want to make
702# sure we didn't break anything
703#TESTS() {
704# CFLAGS="-a -b -c=1"
705# CXXFLAGS="-x -y -z=2"
706# LDFLAGS="-l -m -n=3"
707#
708# die() { exit 1; }
709# (is-flag 1 2 3) && die
710# (is-ldflag 1 2 3) && die
711#
712# is-flagq -l && die
713# is-ldflagq -a && die
714# is-flagq -a || die
715# is-flagq -x || die
716# is-ldflagq -n=* || die
717# is-ldflagq -n && die
718#
719# strip-unsupported-flags
720# [[ ${CFLAGS} == "-c=1" ]] || die
721# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
722#
723# echo "All tests pass"
724#}
725#TESTS

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