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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 1.170 2012/05/26 02:55:02 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.
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
127} 124}
128 125
129# @FUNCTION: append-cppflags 126# @FUNCTION: append-cppflags
130# @USAGE: <flags> 127# @USAGE: <flags>
131# @DESCRIPTION: 128# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS. 129# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() { 130append-cppflags() {
134 [[ -z $* ]] && return 0 131 [[ $# -eq 0 ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*" 132 export CPPFLAGS="${CPPFLAGS} $*"
133 return 0
134}
135
136# @FUNCTION: append-cflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current CFLAGS.
140append-cflags() {
141 [[ $# -eq 0 ]] && return 0
142 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
136 return 0 143 return 0
137} 144}
138 145
139# @FUNCTION: append-cxxflags 146# @FUNCTION: append-cxxflags
140# @USAGE: <flags> 147# @USAGE: <flags>
141# @DESCRIPTION: 148# @DESCRIPTION:
142# Add extra <flags> to the current CXXFLAGS. 149# Add extra <flags> to the current CXXFLAGS.
143append-cxxflags() { 150append-cxxflags() {
144 [[ -z $* ]] && return 0 151 [[ $# -eq 0 ]] && return 0
145 export CXXFLAGS="${CXXFLAGS} $*" 152 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
146 return 0 153 return 0
147} 154}
148 155
149# @FUNCTION: append-fflags 156# @FUNCTION: append-fflags
150# @USAGE: <flags> 157# @USAGE: <flags>
151# @DESCRIPTION: 158# @DESCRIPTION:
152# Add extra <flags> to the current {F,FC}FLAGS. 159# Add extra <flags> to the current {F,FC}FLAGS.
153append-fflags() { 160append-fflags() {
154 [[ -z $* ]] && return 0 161 [[ $# -eq 0 ]] && return 0
155 export FFLAGS="${FFLAGS} $*" 162 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
156 export FCFLAGS="${FCFLAGS} $*" 163 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
157 return 0 164 return 0
158} 165}
159 166
160# @FUNCTION: append-lfs-flags 167# @FUNCTION: append-lfs-flags
161# @DESCRIPTION: 168# @DESCRIPTION:
162# Add flags that enable Large File Support. 169# Add flags that enable Large File Support.
163append-lfs-flags() { 170append-lfs-flags() {
164 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 171 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
172 # 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 173 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
166} 174}
167 175
168# @FUNCTION: append-flags 176# @FUNCTION: append-flags
169# @USAGE: <flags> 177# @USAGE: <flags>
170# @DESCRIPTION: 178# @DESCRIPTION:
171# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 179# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
172append-flags() { 180append-flags() {
173 [[ -z $* ]] && return 0 181 [[ $# -eq 0 ]] && return 0
174 export CFLAGS="${CFLAGS} $*" 182 case " $* " in
175 export CXXFLAGS="${CXXFLAGS} $*" 183 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
176 export FFLAGS="${FFLAGS} $*" 184 *' '-L*) eqawarn 'please use append-ldflags for linker flags' ;;
177 export FCFLAGS="${FCFLAGS} $*" 185 esac
186 append-cflags "$@"
187 append-cxxflags "$@"
188 append-fflags "$@"
178 return 0 189 return 0
179} 190}
180 191
181# @FUNCTION: replace-flags 192# @FUNCTION: replace-flags
182# @USAGE: <old> <new> 193# @USAGE: <old> <new>
183# @DESCRIPTION: 194# @DESCRIPTION:
184# Replace the <old> flag with <new>. Accepts shell globs for <old>. 195# Replace the <old> flag with <new>. Accepts shell globs for <old>.
185replace-flags() { 196replace-flags() {
186 [[ $# != 2 ]] \
187 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 197 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
188 && die "replace-flags takes 2 arguments, not $#"
189 198
190 local f fset 199 local f var new
191 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 200 for var in $(all-flag-vars) ; do
192
193 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
194 # Looping over the flags instead of using a global 201 # Looping over the flags instead of using a global
195 # substitution ensures that we're working with flag atoms. 202 # substitution ensures that we're working with flag atoms.
196 # Otherwise globs like -O* have the potential to wipe out the 203 # Otherwise globs like -O* have the potential to wipe out the
197 # list of flags. 204 # list of flags.
205 new=()
198 for f in ${!fset}; do 206 for f in ${!var} ; do
199 # Note this should work with globs like -O* 207 # Note this should work with globs like -O*
200 [[ ${f} == ${1} ]] && f=${2} 208 [[ ${f} == ${1} ]] && f=${2}
201 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 209 new+=( "${f}" )
202 done 210 done
203 eval export ${fset}=\${new_${fset}\[*]} 211 eval export ${var}=\""${new[*]}"\"
204 done 212 done
205 213
206 return 0 214 return 0
207} 215}
208 216
236# @USAGE: <flag> 244# @USAGE: <flag>
237# @DESCRIPTION: 245# @DESCRIPTION:
238# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. 246# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
239is-flagq() { 247is-flagq() {
240 [[ -n $2 ]] && die "Usage: is-flag <flag>" 248 [[ -n $2 ]] && die "Usage: is-flag <flag>"
241 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1 249
250 local var
251 for var in $(all-flag-vars) ; do
252 _is_flagq ${var} "$1" && return 0
253 done
254 return 1
242} 255}
243 256
244# @FUNCTION: is-flag 257# @FUNCTION: is-flag
245# @USAGE: <flag> 258# @USAGE: <flag>
246# @DESCRIPTION: 259# @DESCRIPTION:
302 315
303# @FUNCTION: strip-flags 316# @FUNCTION: strip-flags
304# @DESCRIPTION: 317# @DESCRIPTION:
305# Strip C[XX]FLAGS of everything except known good/safe flags. 318# Strip C[XX]FLAGS of everything except known good/safe flags.
306strip-flags() { 319strip-flags() {
307 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 320 local x y var
308 321
309 setup-allowed-flags 322 setup-allowed-flags
310 323
311 local NEW_CFLAGS=""
312 local NEW_CXXFLAGS=""
313 local NEW_FFLAGS=""
314 local NEW_FCFLAGS=""
315
316 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
317 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
318 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
319 fi
320
321 set -f # disable pathname expansion 324 set -f # disable pathname expansion
322 325
323 for x in ${CFLAGS}; do 326 for var in $(all-flag-vars) ; do
327 local new=()
328
329 for x in ${!var} ; do
330 local flag=${x%%=*}
324 for y in ${ALLOWED_FLAGS}; do 331 for y in ${ALLOWED_FLAGS} ; do
325 flag=${x%%=*}
326 if [ "${flag%%${y}}" = "" ] ; then 332 if [[ -z ${flag%%${y}} ]] ; then
327 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 333 new+=( "${x}" )
328 break 334 break
329 fi 335 fi
330 done 336 done
331 done 337 done
332 338
333 for x in ${CXXFLAGS}; do
334 for y in ${ALLOWED_FLAGS}; do
335 flag=${x%%=*}
336 if [ "${flag%%${y}}" = "" ] ; then
337 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
338 break
339 fi
340 done
341 done
342
343 for x in ${FFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 for x in ${FCFLAGS}; do
354 for y in ${ALLOWED_FLAGS}; do
355 flag=${x%%=*}
356 if [ "${flag%%${y}}" = "" ] ; then
357 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
358 break
359 fi
360 done
361 done
362
363 # In case we filtered out all optimization flags fallback to -O2 339 # In case we filtered out all optimization flags fallback to -O2
364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 340 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
365 NEW_CFLAGS="${NEW_CFLAGS} -O2" 341 new+=( -O2 )
366 fi 342 fi
367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 343
368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 344 eval export ${var}=\""${new[*]}"\"
369 fi 345 done
370 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
371 NEW_FFLAGS="${NEW_FFLAGS} -O2"
372 fi
373 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
375 fi
376 346
377 set +f # re-enable pathname expansion 347 set +f # re-enable pathname expansion
378 348
379 export CFLAGS="${NEW_CFLAGS}"
380 export CXXFLAGS="${NEW_CXXFLAGS}"
381 export FFLAGS="${NEW_FFLAGS}"
382 export FCFLAGS="${NEW_FCFLAGS}"
383 return 0 349 return 0
384} 350}
385 351
386test-flag-PROG() { 352test-flag-PROG() {
387 local comp=$1 353 local comp=$1
388 local flags="$2" 354 local flag=$2
389 355
390 [[ -z ${comp} || -z ${flags} ]] && \ 356 [[ -z ${comp} || -z ${flag} ]] && return 1
391 return 1
392 357
358 # use -c so we can test the assembler as well
393 local PROG=$(tc-get${comp}) 359 local PROG=$(tc-get${comp})
394 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 360 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
395 > /dev/null 2>&1 361 > /dev/null 2>&1
396} 362}
397 363
398# @FUNCTION: test-flag-CC 364# @FUNCTION: test-flag-CC
399# @USAGE: <flag> 365# @USAGE: <flag>
426 392
427 shift 393 shift
428 394
429 [[ -z ${comp} ]] && return 1 395 [[ -z ${comp} ]] && return 1
430 396
431 x=""
432 for x in "$@" ; do 397 for x in "$@" ; do
433 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 398 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
434 done 399 done
435 400
436 echo "${flags}" 401 echo "${flags}"
467# @USAGE: <flags> 432# @USAGE: <flags>
468# @DESCRIPTION: 433# @DESCRIPTION:
469# Short-hand that should hopefully work for both C and C++ compiler, but 434# Short-hand that should hopefully work for both C and C++ compiler, but
470# its really only present due to the append-flags() abomination. 435# its really only present due to the append-flags() abomination.
471test-flags() { test-flags-CC "$@"; } 436test-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}
481 437
482# @FUNCTION: test_version_info 438# @FUNCTION: test_version_info
483# @USAGE: <version> 439# @USAGE: <version>
484# @DESCRIPTION: 440# @DESCRIPTION:
485# Returns shell true if the current C compiler version matches <version>, else returns shell false. 441# Returns shell true if the current C compiler version matches <version>, else returns shell false.
505# @FUNCTION: get-flag 461# @FUNCTION: get-flag
506# @USAGE: <flag> 462# @USAGE: <flag>
507# @DESCRIPTION: 463# @DESCRIPTION:
508# Find and echo the value for a particular flag. Accepts shell globs. 464# Find and echo the value for a particular flag. Accepts shell globs.
509get-flag() { 465get-flag() {
510 local f findflag="$1" 466 local f var findflag="$1"
511 467
512 # this code looks a little flaky but seems to work for 468 # this code looks a little flaky but seems to work for
513 # everything we want ... 469 # everything we want ...
514 # for example, if CFLAGS="-march=i686": 470 # for example, if CFLAGS="-march=i686":
515 # `get-flag -march` == "-march=i686" 471 # `get-flag -march` == "-march=i686"
516 # `get-flag march` == "i686" 472 # `get-flag march` == "i686"
517 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 473 for var in $(all-flag-vars) ; do
474 for f in ${!var} ; do
518 if [ "${f/${findflag}}" != "${f}" ] ; then 475 if [ "${f/${findflag}}" != "${f}" ] ; then
519 printf "%s\n" "${f/-${findflag}=}" 476 printf "%s\n" "${f/-${findflag}=}"
520 return 0 477 return 0
521 fi 478 fi
479 done
522 done 480 done
523 return 1 481 return 1
524}
525
526# @FUNCTION: has_hardened
527# @DESCRIPTION:
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
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
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
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
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
580
581 # note; this matches both -fstack-protector and -fstack-protector-all
582 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
583 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
584 gcc-specs-ssp
585} 482}
586 483
587# @FUNCTION: has_m64 484# @FUNCTION: has_m64
588# @DESCRIPTION: 485# @DESCRIPTION:
589# This doesn't test if the flag is accepted, it tests if the flag actually 486# This doesn't test if the flag is accepted, it tests if the flag actually
590# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 487# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
591# return code is 0, else the return code is 1. 488# return code is 0, else the return code is 1.
592has_m64() { 489has_m64() {
490 eqawarn "${FUNCNAME}: don't use this anymore"
491
593 # this doesnt test if the flag is accepted, it tests if the flag 492 # this doesnt test if the flag is accepted, it tests if the flag
594 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 493 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
595 # please dont replace this function with test_flag in some future 494 # please dont replace this function with test_flag in some future
596 # clean-up! 495 # clean-up!
597 496
603 rm -f "${temp}".c 502 rm -f "${temp}".c
604 [[ ${ret} != 1 ]] && return 0 503 [[ ${ret} != 1 ]] && return 0
605 return 1 504 return 1
606} 505}
607 506
608# @FUNCTION: has_m32
609# @DESCRIPTION:
610# This doesn't test if the flag is accepted, it tests if the flag actually
611# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
612# code is 0, else return code is 1.
613has_m32() { 507has_m32() {
614 # this doesnt test if the flag is accepted, it tests if the flag 508 die "${FUNCNAME}: don't use this anymore"
615 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
616 # please dont replace this function with test_flag in some future
617 # clean-up!
618
619 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
620
621 local temp=$(emktemp)
622 echo "int main() { return(0); }" > "${temp}".c
623 MY_CC=$(tc-getCC)
624 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
625 local ret=$?
626 rm -f "${temp}".c
627 [[ ${ret} != 1 ]] && return 0
628 return 1
629} 509}
630 510
631# @FUNCTION: replace-sparc64-flags 511# @FUNCTION: replace-sparc64-flags
632# @DESCRIPTION: 512# @DESCRIPTION:
633# Sets mcpu to v8 and uses the original value as mtune if none specified. 513# Sets mcpu to v8 and uses the original value as mtune if none specified.
655 fi 535 fi
656 536
657 export CFLAGS CXXFLAGS 537 export CFLAGS CXXFLAGS
658} 538}
659 539
540# @FUNCTION: append-libs
541# @USAGE: <libs>
542# @DESCRIPTION:
543# Add extra <libs> to the current LIBS.
544append-libs() {
545 [[ $# -eq 0 ]] && return 0
546 local flag
547 for flag in "$@"; do
548 [[ ${flag} == -l* ]] && flag=${flag#-l}
549 export LIBS="${LIBS} -l${flag}"
550 done
551
552 return 0
553}
554
660# @FUNCTION: append-ldflags 555# @FUNCTION: append-ldflags
661# @USAGE: <flags> 556# @USAGE: <flags>
662# @DESCRIPTION: 557# @DESCRIPTION:
663# Add extra <flags> to the current LDFLAGS. 558# Add extra <flags> to the current LDFLAGS.
664append-ldflags() { 559append-ldflags() {
665 [[ -z $* ]] && return 0 560 [[ $# -eq 0 ]] && return 0
666 local flag 561 local flag
667 for flag in "$@"; do 562 for flag in "$@"; do
668 [[ ${flag} == -l* ]] && \ 563 [[ ${flag} == -l* ]] && \
669 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 564 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
670 done 565 done
681 _filter-var LDFLAGS "$@" 576 _filter-var LDFLAGS "$@"
682 return 0 577 return 0
683} 578}
684 579
685# @FUNCTION: raw-ldflags 580# @FUNCTION: raw-ldflags
686# @USAGE: <flags> 581# @USAGE: [flags]
687# @DESCRIPTION: 582# @DESCRIPTION:
688# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 583# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
689# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 584# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
690# to gcc where it needs the '-Wl,'. 585# to gcc where it needs the '-Wl,'.
586#
587# If no flags are specified, then default to ${LDFLAGS}.
691raw-ldflags() { 588raw-ldflags() {
692 local x input="$@" 589 local x input="$@"
693 [[ -z ${input} ]] && input=${LDFLAGS} 590 [[ -z ${input} ]] && input=${LDFLAGS}
694 set -- 591 set --
695 for x in ${input} ; do 592 for x in ${input} ; do
697 set -- "$@" ${x//,/ } 594 set -- "$@" ${x//,/ }
698 done 595 done
699 echo "$@" 596 echo "$@"
700} 597}
701 598
702# @FUNCTION: bindnow-flags 599# @FUNCTION: no-as-needed
703# @RETURN: Returns the flags to enable "now" binding in the current selected linker. 600# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
704# @DESCRIPTION: 601no-as-needed() {
705# DEPRECATED - Gets the flags needed for "NOW" binding 602 case $($(tc-getLD) -v 2>&1 </dev/null) in
706bindnow-flags() { 603 *GNU*) # GNU ld
707 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" 604 echo "-Wl,--no-as-needed" ;;
605 esac
708} 606}
709 607
710 608fi
711# Some tests for when we screw with things and want to make
712# sure we didn't break anything
713#TESTS() {
714# CFLAGS="-a -b -c=1"
715# CXXFLAGS="-x -y -z=2"
716# LDFLAGS="-l -m -n=3"
717#
718# die() { exit 1; }
719# (is-flag 1 2 3) && die
720# (is-ldflag 1 2 3) && die
721#
722# is-flagq -l && die
723# is-ldflagq -a && die
724# is-flagq -a || die
725# is-flagq -x || die
726# is-ldflagq -n=* || die
727# is-ldflagq -n && die
728#
729# strip-unsupported-flags
730# [[ ${CFLAGS} == "-c=1" ]] || die
731# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
732#
733# echo "All tests pass"
734#}
735#TESTS

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