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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2014 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 1.79 2004/12/25 18:45:56 chriswhite Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.201 2014/07/11 08:21:58 ulm Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic 5# @ECLASS: flag-o-matic.eclass
8INHERITED="$INHERITED $ECLASS" 6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
9 12
10IUSE="debug" 13if [[ -z ${_FLAG_O_MATIC_ECLASS} ]]; then
14_FLAG_O_MATIC_ECLASS=1
11 15
12# need access to emktemp()
13inherit eutils toolchain-funcs 16inherit eutils toolchain-funcs multilib
14 17
15# 18# Return all the flag variables that our high level funcs operate on.
16#### filter-flags <flags> #### 19all-flag-vars() {
17# Remove particular flags from C[XX]FLAGS 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
18# Matches only complete flags 21}
19#
20#### append-flags <flags> ####
21# Add extra flags to your current C[XX]FLAGS
22#
23#### replace-flags <orig.flag> <new.flag> ###
24# Replace a flag by another one
25#
26#### replace-cpu-flags <old.cpus> <new.cpu> ###
27# Replace march/mcpu flags that specify <old.cpus>
28# with flags that specify <new.cpu>
29#
30#### is-flag <flag> ####
31# Returns "true" if flag is set in C[XX]FLAGS
32# Matches only complete a flag
33#
34#### strip-flags ####
35# Strip C[XX]FLAGS of everything except known
36# good options.
37#
38#### strip-unsupported-flags ####
39# Strip C[XX]FLAGS of any flags not supported by
40# installed version of gcc
41#
42#### get-flag <flag> ####
43# Find and echo the value for a particular flag
44#
45#### replace-sparc64-flags ####
46# Sets mcpu to v8 and uses the original value
47# as mtune if none specified.
48#
49#### filter-mfpmath <math types> ####
50# Remove specified math types from the fpmath specification
51# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52# will leave the user with -mfpmath=386
53#
54#### append-ldflags ####
55# Add extra flags to your current LDFLAGS
56#
57#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS
59# Matches only complete flags
60#
61#### etexec-flags ####
62# hooked function for hardened gcc that appends
63# -fno-pic to {C,CXX,LD}FLAGS
64# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
65#
66#### fstack-flags ####
67# hooked function for hardened gcc that appends
68# -fno-stack-protector to {C,CXX,LD}FLAGS
69# when a package is filtering -fstack-protector, -fstack-protector-all
70# notice: modern automatic specs files will also suppress -fstack-protector-all
71# when only -fno-stack-protector is given
72#
73 22
74# C[XX]FLAGS that we allow in strip-flags 23# {C,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags
24# Note: shell globs and character lists are allowed
75setup-allowed-flags() { 25setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then
77 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -Og -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 28 ALLOWED_FLAGS+=" -fstack-protector*"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gdwarf-* gstabs -gstabs+"
32 ALLOWED_FLAGS+=" -fno-ident -fpermissive -frecord-gcc-switches"
33 ALLOWED_FLAGS+=" -fdiagnostics*"
34 ALLOWED_FLAGS+=" -W* -w"
35
36 # allow a bunch of flags that negate features / control ABI
37 ALLOWED_FLAGS+=" -fno-stack-protector* -fabi-version=* \
38 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
39 -fno-omit-frame-pointer -fno-builtin*"
40 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
41 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
42 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
43 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
44 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
45 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
46 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
47 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
48 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
49 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi \
50 -D* -U*"
51
52 # 4.5
53 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
54 # 4.6
55 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
56 # 4.7
57 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
58 # 4.8
59 ALLOWED_FLAGS+=" -mno-fxsr -mno-rtm -mno-xsave -mno-xsaveopt"
60 # 4.9
61 ALLOWED_FLAGS+=" -mno-avx512cd -mno-avx512er -mno-avx512f -mno-avx512pf -mno-sha"
62
63 # CPPFLAGS and LDFLAGS
64 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
65
66 export ALLOWED_FLAGS
67 return 0
68}
69
70# inverted filters for hardened compiler. This is trying to unpick
71# the hardened compiler defaults.
72_filter-hardened() {
73 local f
74 for f in "$@" ; do
82 case "${ARCH}" in 75 case "${f}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 76 # Ideally we should only concern ourselves with PIE flags,
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 77 # not -fPIC or -fpic, but too many places filter -fPIC without
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 78 # thinking about -fPIE.
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 80 gcc-specs-pie || continue
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 81 is-flagq -nopie || append-flags -nopie;;
89 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 82 -fstack-protector)
83 gcc-specs-ssp || continue
84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
85 -fstack-protector-all)
86 gcc-specs-ssp-to-all || continue
87 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 -fno-strict-overflow)
89 gcc-specs-nostrict || continue
90 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
90 esac 91 esac
91 fi 92 done
92 # allow a bunch of flags that negate features / control ABI 93}
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 94
94 case "${ARCH}" in 95# Remove occurrences of strings from variable given in $1
95 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 96# Strings removed are matched as globs, so for example
97# '-O*' would remove -O1, -O2 etc.
98_filter-var() {
99 local f x var=$1 new=()
100 shift
101
102 for f in ${!var} ; do
103 for x in "$@" ; do
104 # Note this should work with globs like -O*
105 [[ ${f} == ${x} ]] && continue 2
106 done
107 new+=( "${f}" )
108 done
109 eval export ${var}=\""${new[*]}"\"
110}
111
112# @FUNCTION: filter-flags
113# @USAGE: <flags>
114# @DESCRIPTION:
115# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
116filter-flags() {
117 _filter-hardened "$@"
118 local v
119 for v in $(all-flag-vars) ; do
120 _filter-var ${v} "$@"
121 done
122 return 0
123}
124
125# @FUNCTION: filter-lfs-flags
126# @DESCRIPTION:
127# Remove flags that enable Large File Support.
128filter-lfs-flags() {
129 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
130 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
131 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
132 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
133 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135}
136
137# @FUNCTION: filter-ldflags
138# @USAGE: <flags>
139# @DESCRIPTION:
140# Remove particular <flags> from LDFLAGS. Accepts shell globs.
141filter-ldflags() {
142 _filter-var LDFLAGS "$@"
143 return 0
144}
145
146# @FUNCTION: append-cppflags
147# @USAGE: <flags>
148# @DESCRIPTION:
149# Add extra <flags> to the current CPPFLAGS.
150append-cppflags() {
151 [[ $# -eq 0 ]] && return 0
152 export CPPFLAGS+=" $*"
153 return 0
154}
155
156# @FUNCTION: append-cflags
157# @USAGE: <flags>
158# @DESCRIPTION:
159# Add extra <flags> to the current CFLAGS. If a flag might not be supported
160# with different compilers (or versions), then use test-flags-CC like so:
161# @CODE
162# append-cflags $(test-flags-CC -funky-flag)
163# @CODE
164append-cflags() {
165 [[ $# -eq 0 ]] && return 0
166 # Do not do automatic flag testing ourselves. #417047
167 export CFLAGS+=" $*"
168 return 0
169}
170
171# @FUNCTION: append-cxxflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current CXXFLAGS. If a flag might not be supported
175# with different compilers (or versions), then use test-flags-CXX like so:
176# @CODE
177# append-cxxflags $(test-flags-CXX -funky-flag)
178# @CODE
179append-cxxflags() {
180 [[ $# -eq 0 ]] && return 0
181 # Do not do automatic flag testing ourselves. #417047
182 export CXXFLAGS+=" $*"
183 return 0
184}
185
186# @FUNCTION: append-fflags
187# @USAGE: <flags>
188# @DESCRIPTION:
189# Add extra <flags> to the current {F,FC}FLAGS. If a flag might not be supported
190# with different compilers (or versions), then use test-flags-F77 like so:
191# @CODE
192# append-fflags $(test-flags-F77 -funky-flag)
193# @CODE
194append-fflags() {
195 [[ $# -eq 0 ]] && return 0
196 # Do not do automatic flag testing ourselves. #417047
197 export FFLAGS+=" $*"
198 export FCFLAGS+=" $*"
199 return 0
200}
201
202# @FUNCTION: append-lfs-flags
203# @DESCRIPTION:
204# Add flags that enable Large File Support.
205append-lfs-flags() {
206 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
207 # see comments in filter-lfs-flags func for meaning of these
208 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
209}
210
211# @FUNCTION: append-ldflags
212# @USAGE: <flags>
213# @DESCRIPTION:
214# Add extra <flags> to the current LDFLAGS.
215append-ldflags() {
216 [[ $# -eq 0 ]] && return 0
217 local flag
218 for flag in "$@"; do
219 [[ ${flag} == -l* ]] && \
220 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
221 done
222
223 export LDFLAGS="${LDFLAGS} $*"
224 return 0
225}
226
227# @FUNCTION: append-flags
228# @USAGE: <flags>
229# @DESCRIPTION:
230# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
231append-flags() {
232 [[ $# -eq 0 ]] && return 0
233 case " $* " in
234 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
235 *' '-L*|\
236 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
96 esac 237 esac
97 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias" 238 append-cflags "$@"
98 239 append-cxxflags "$@"
99 # C[XX]FLAGS that we are think is ok, but needs testing 240 append-fflags "$@"
100 # NOTE: currently -Os have issues with gcc3 and K6* arch's
101 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
102 return 0 241 return 0
103} 242}
104 243
105filter-flags() { 244# @FUNCTION: replace-flags
106 local x f fset 245# @USAGE: <old> <new>
107 declare -a new_CFLAGS new_CXXFLAGS 246# @DESCRIPTION:
247# Replace the <old> flag with <new>. Accepts shell globs for <old>.
248replace-flags() {
249 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
108 250
109 for x in "$@" ; do 251 local f var new
110 case "${x}" in 252 for var in $(all-flag-vars) ; do
111 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
112 -fstack-protector|-fstack-protector-all) fstack-flags;;
113 esac
114 done
115
116 for fset in CFLAGS CXXFLAGS; do
117 # Looping over the flags instead of using a global 253 # Looping over the flags instead of using a global
118 # substitution ensures that we're working with flag atoms. 254 # substitution ensures that we're working with flag atoms.
119 # Otherwise globs like -O* have the potential to wipe out the 255 # Otherwise globs like -O* have the potential to wipe out the
120 # list of flags. 256 # list of flags.
257 new=()
121 for f in ${!fset}; do 258 for f in ${!var} ; do
122 for x in "$@"; do
123 # Note this should work with globs like -O*
124 [[ ${f} == ${x} ]] && continue 2
125 done
126 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
127 done
128 eval export ${fset}=\${new_${fset}\[*]}
129 done
130
131 return 0
132}
133
134filter-lfs-flags() {
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136}
137
138append-lfs-flags() {
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140}
141
142append-flags() {
143 export CFLAGS="${CFLAGS} $*"
144 export CXXFLAGS="${CXXFLAGS} $*"
145 [ -n "`is-flag -fno-stack-protector`" -o \
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
147 return 0
148}
149
150replace-flags() {
151 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS
153
154 for fset in CFLAGS CXXFLAGS; do
155 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms.
157 # Otherwise globs like -O* have the potential to wipe out the
158 # list of flags.
159 for f in ${!fset}; do
160 # Note this should work with globs like -O* 259 # Note this should work with globs like -O*
161 [[ ${f} == ${1} ]] && f=${2} 260 [[ ${f} == ${1} ]] && f=${2}
162 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 261 new+=( "${f}" )
163 done
164 eval export ${fset}=\${new_${fset}\[*]}
165 done 262 done
263 eval export ${var}=\""${new[*]}"\"
264 done
166 265
167 return 0 266 return 0
168} 267}
169 268
269# @FUNCTION: replace-cpu-flags
270# @USAGE: <old> <new>
271# @DESCRIPTION:
272# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
273# with flags that select the <new> cpu. Accepts shell globs for <old>.
170replace-cpu-flags() { 274replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}" 275 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do 276 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on 277 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags 278 # ${oldcpu}) prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}" 279 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 280 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 281 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift 282 shift
179 done 283 done
180 return 0 284 return 0
181} 285}
182 286
287_is_flagq() {
288 local x var
289 eval var=\""\${$1[*]}"\"
290 for x in ${var} ; do
291 [[ ${x} == $2 ]] && return 0
292 done
293 return 1
294}
295
296# @FUNCTION: is-flagq
297# @USAGE: <flag>
298# @DESCRIPTION:
299# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
300is-flagq() {
301 [[ -n $2 ]] && die "Usage: is-flag <flag>"
302
303 local var
304 for var in $(all-flag-vars) ; do
305 _is_flagq ${var} "$1" && return 0
306 done
307 return 1
308}
309
310# @FUNCTION: is-flag
311# @USAGE: <flag>
312# @DESCRIPTION:
313# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
183is-flag() { 314is-flag() {
184 local x 315 is-flagq "$@" && echo true
185
186 for x in ${CFLAGS} ${CXXFLAGS} ; do
187 # Note this should work with globs like -mcpu=ultrasparc*
188 if [[ ${x} == ${1} ]]; then
189 echo true
190 return 0
191 fi
192 done
193 return 1
194} 316}
195 317
318# @FUNCTION: is-ldflagq
319# @USAGE: <flag>
320# @DESCRIPTION:
321# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
322is-ldflagq() {
323 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
324 _is_flagq LDFLAGS $1
325}
326
327# @FUNCTION: is-ldflag
328# @USAGE: <flag>
329# @DESCRIPTION:
330# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
331is-ldflag() {
332 is-ldflagq "$@" && echo true
333}
334
335# @FUNCTION: filter-mfpmath
336# @USAGE: <math types>
337# @DESCRIPTION:
338# Remove specified math types from the fpmath flag. For example, if the user
339# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
340# -mfpmath=386.
196filter-mfpmath() { 341filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 342 local orig_mfpmath new_math prune_math
198 343
199 # save the original -mfpmath flag 344 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 345 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 346 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 347 new_math=$(get-flag mfpmath)
348 # convert "both" to something we can filter
349 new_math=${new_math/both/387,sse}
350 new_math=" ${new_math//[,+]/ } "
203 # figure out which math values are to be removed 351 # figure out which math values are to be removed
204 prune_math="" 352 prune_math=""
205 for prune_math in "$@" ; do 353 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 354 new_math=${new_math/ ${prune_math} / }
207 done 355 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 356 new_math=$(echo ${new_math})
357 new_math=${new_math// /,}
209 358
210 if [ -z "${new_math}" ] ; then 359 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 360 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 361 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 362 filter-flags ${orig_mfpmath}
214 else 363 else
215 # if we only want to filter some of the user specified 364 # if we only want to filter some of the user specified
217 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 366 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218 fi 367 fi
219 return 0 368 return 0
220} 369}
221 370
371# @FUNCTION: strip-flags
372# @DESCRIPTION:
373# Strip *FLAGS of everything except known good/safe flags. This runs over all
374# flags returned by all_flag_vars().
222strip-flags() { 375strip-flags() {
223 local x y flag NEW_CFLAGS NEW_CXXFLAGS 376 local x y var
224 377
225 setup-allowed-flags 378 setup-allowed-flags
226 379
227 local NEW_CFLAGS="" 380 set -f # disable pathname expansion
228 local NEW_CXXFLAGS=""
229 381
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 382 for var in $(all-flag-vars) ; do
231 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 383 local new=()
232 use debug && einfo "Enabling the use of some unstable flags" 384
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 385 for x in ${!var} ; do
386 local flag=${x%%=*}
387 for y in ${ALLOWED_FLAGS} ; do
388 if [[ -z ${flag%%${y}} ]] ; then
389 new+=( "${x}" )
390 break
391 fi
392 done
393 done
394
395 # In case we filtered out all optimization flags fallback to -O2
396 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
397 new+=( -O2 )
398 fi
399
400 if [[ ${!var} != "${new[*]}" ]] ; then
401 einfo "strip-flags: ${var}: changed '${!var}' to '${new[*]}'"
402 fi
403 eval export ${var}=\""${new[*]}"\"
404 done
405
406 set +f # re-enable pathname expansion
407
408 return 0
409}
410
411test-flag-PROG() {
412 local comp=$1
413 local lang=$2
414 local flag=$3
415
416 [[ -z ${comp} || -z ${flag} ]] && return 1
417
418 # use -c so we can test the assembler as well
419 local PROG=$(tc-get${comp})
420 if ${PROG} -c -o /dev/null -x${lang} - < /dev/null > /dev/null 2>&1 ; then
421 ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \
422 > /dev/null 2>&1
423 else
424 ${PROG} "${flag}" -c -o /dev/null /dev/null > /dev/null 2>&1
234 fi 425 fi
426}
235 427
236 set -f # disable pathname expansion 428# @FUNCTION: test-flag-CC
429# @USAGE: <flag>
430# @DESCRIPTION:
431# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
432test-flag-CC() { test-flag-PROG "CC" c "$1"; }
237 433
238 for x in ${CFLAGS}; do 434# @FUNCTION: test-flag-CXX
239 for y in ${ALLOWED_FLAGS}; do 435# @USAGE: <flag>
240 flag=${x%%=*} 436# @DESCRIPTION:
241 if [ "${flag%%${y}}" = "" ] ; then 437# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
242 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 438test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
243 break 439
244 fi 440# @FUNCTION: test-flag-F77
441# @USAGE: <flag>
442# @DESCRIPTION:
443# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
444test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
445
446# @FUNCTION: test-flag-FC
447# @USAGE: <flag>
448# @DESCRIPTION:
449# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
450test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
451
452test-flags-PROG() {
453 local comp=$1
454 local flags=()
455 local x
456
457 shift
458
459 [[ -z ${comp} ]] && return 1
460
461 for x ; do
462 test-flag-${comp} "${x}" && flags+=( "${x}" )
245 done 463 done
246 done
247 464
248 for x in ${CXXFLAGS}; do 465 echo "${flags[*]}"
249 for y in ${ALLOWED_FLAGS}; do
250 flag=${x%%=*}
251 if [ "${flag%%${y}}" = "" ] ; then
252 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
253 break
254 fi
255 done
256 done
257 466
258 # In case we filtered out all optimization flags fallback to -O2 467 # Just bail if we dont have any flags
259 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 468 [[ ${#flags[@]} -gt 0 ]]
260 NEW_CFLAGS="${NEW_CFLAGS} -O2"
261 fi
262 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264 fi
265
266 set +f # re-enable pathname expansion
267
268 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}"
270 return 0
271} 469}
272 470
273test_flag() { 471# @FUNCTION: test-flags-CC
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 472# @USAGE: <flags>
275 printf "%s\n" "$*" 473# @DESCRIPTION:
276 return 0 474# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
277 fi 475test-flags-CC() { test-flags-PROG "CC" "$@"; }
278 return 1
279}
280 476
477# @FUNCTION: test-flags-CXX
478# @USAGE: <flags>
479# @DESCRIPTION:
480# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
481test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
482
483# @FUNCTION: test-flags-F77
484# @USAGE: <flags>
485# @DESCRIPTION:
486# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
487test-flags-F77() { test-flags-PROG "F77" "$@"; }
488
489# @FUNCTION: test-flags-FC
490# @USAGE: <flags>
491# @DESCRIPTION:
492# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
493test-flags-FC() { test-flags-PROG "FC" "$@"; }
494
495# @FUNCTION: test-flags
496# @USAGE: <flags>
497# @DESCRIPTION:
498# Short-hand that should hopefully work for both C and C++ compiler, but
499# its really only present due to the append-flags() abomination.
500test-flags() { test-flags-CC "$@"; }
501
502# @FUNCTION: test_version_info
503# @USAGE: <version>
504# @DESCRIPTION:
505# Returns shell true if the current C compiler version matches <version>, else returns shell false.
506# Accepts shell globs.
281test_version_info() { 507test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 508 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 509 return 0
284 else 510 else
285 return 1 511 return 1
286 fi 512 fi
287} 513}
288 514
515# @FUNCTION: strip-unsupported-flags
516# @DESCRIPTION:
517# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
289strip-unsupported-flags() { 518strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 519 export CFLAGS=$(test-flags-CC ${CFLAGS})
291 520 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
292 for x in ${CFLAGS} ; do 521 export FFLAGS=$(test-flags-F77 ${FFLAGS})
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 522 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
294 done
295 for x in ${CXXFLAGS} ; do
296 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
297 done
298
299 export CFLAGS="${NEW_CFLAGS}"
300 export CXXFLAGS="${NEW_CXXFLAGS}"
301} 523}
302 524
525# @FUNCTION: get-flag
526# @USAGE: <flag>
527# @DESCRIPTION:
528# Find and echo the value for a particular flag. Accepts shell globs.
303get-flag() { 529get-flag() {
304 local f findflag="$1" 530 local f var findflag="$1"
305 531
306 # this code looks a little flaky but seems to work for 532 # this code looks a little flaky but seems to work for
307 # everything we want ... 533 # everything we want ...
308 # for example, if CFLAGS="-march=i686": 534 # for example, if CFLAGS="-march=i686":
309 # `get-flag -march` == "-march=i686" 535 # `get-flag -march` == "-march=i686"
310 # `get-flag march` == "i686" 536 # `get-flag march` == "i686"
311 for f in ${CFLAGS} ${CXXFLAGS} ; do 537 for var in $(all-flag-vars) ; do
538 for f in ${!var} ; do
312 if [ "${f/${findflag}}" != "${f}" ] ; then 539 if [ "${f/${findflag}}" != "${f}" ] ; then
313 printf "%s\n" "${f/-${findflag}=}" 540 printf "%s\n" "${f/-${findflag}=}"
314 return 0 541 return 0
315 fi 542 fi
543 done
316 done 544 done
317 return 1 545 return 1
318} 546}
319 547
320has_hardened() { 548# @FUNCTION: has_m64
321 test_version_info Hardened && return 0 549# @DESCRIPTION:
322 # the specs file wont exist unless gcc has GCC_SPECS support 550# This doesn't test if the flag is accepted, it tests if the flag actually
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 551# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
324 return 0 552# return code is 0, else the return code is 1.
325 return 1
326}
327
328has_pic() {
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 test_version_info pie && return 0
332 return 1
333}
334
335has_pie() {
336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
338 test_version_info pie && return 0
339 return 1
340}
341
342has_ssp() {
343 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
344 test_version_info ssp && return 0
345 return 1
346}
347
348has_m64() { 553has_m64() {
554 eqawarn "${FUNCNAME}: don't use this anymore"
555
349 # this doesnt test if the flag is accepted, it tests if the flag 556 # this doesnt test if the flag is accepted, it tests if the flag
350 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 557 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
351 # please dont replace this function with test_flag in some future 558 # please dont replace this function with test_flag in some future
352 # clean-up! 559 # clean-up!
560
353 local temp="$(emktemp)" 561 local temp="$(emktemp)"
354 echo "int main() { return(0); }" > ${temp}.c 562 echo "int main() { return(0); }" > "${temp}".c
355 MY_CC=$(tc-getCC) 563 MY_CC=$(tc-getCC)
356 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 564 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
357 local ret=$? 565 local ret=$?
358 rm -f ${temp}.c 566 rm -f "${temp}".c
359 [ "$ret" != "1" ] && return 0 567 [[ ${ret} != 1 ]] && return 0
360 return 1 568 return 1
361} 569}
362 570
363has_m32() { 571has_m32() {
364 # this doesnt test if the flag is accepted, it tests if the flag 572 die "${FUNCNAME}: don't use this anymore"
365 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366 # please dont replace this function with test_flag in some future
367 # clean-up!
368 local temp="$(emktemp)"
369 echo "int main() { return(0); }" > ${temp}.c
370 MY_CC=$(tc-getCC)
371 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
372 local ret=$?
373 rm -f ${temp}.c
374 [ "$ret" != "1" ] && return 0
375 return 1
376} 573}
377 574
575# @FUNCTION: replace-sparc64-flags
576# @DESCRIPTION:
577# Sets mcpu to v8 and uses the original value as mtune if none specified.
378replace-sparc64-flags() { 578replace-sparc64-flags() {
379 local SPARC64_CPUS="ultrasparc v9" 579 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
380 580
381 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 581 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382 for x in ${SPARC64_CPUS}; do 582 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 583 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384 done 584 done
385 else 585 else
386 for x in ${SPARC64_CPUS}; do 586 for x in ${SPARC64_CPUS}; do
387 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 587 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388 done 588 done
389 fi 589 fi
390 590
391 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 591 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392 for x in ${SPARC64_CPUS}; do 592 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 593 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394 done 594 done
395 else 595 else
396 for x in ${SPARC64_CPUS}; do 596 for x in ${SPARC64_CPUS}; do
397 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 597 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
398 done 598 done
399 fi 599 fi
400 600
401 export CFLAGS CXXFLAGS 601 export CFLAGS CXXFLAGS
402} 602}
403 603
604# @FUNCTION: append-libs
605# @USAGE: <libs>
606# @DESCRIPTION:
607# Add extra <libs> to the current LIBS. All arguments should be prefixed with
608# either -l or -L. For compatibility, if arguments are not prefixed as
609# options, they are given a -l prefix automatically.
404append-ldflags() { 610append-libs() {
405 export LDFLAGS="${LDFLAGS} $*" 611 [[ $# -eq 0 ]] && return 0
406 return 0 612 local flag
407}
408
409filter-ldflags() {
410 local x
411
412 # we do this fancy spacing stuff so as to not filter
413 # out part of a flag ... we want flag atoms ! :D
414 LDFLAGS=" ${LDFLAGS} "
415 for x in "$@" ; do 613 for flag in "$@"; do
416 LDFLAGS="${LDFLAGS// ${x} / }" 614 if [[ -z "${flag// }" ]]; then
417 done 615 eqawarn "Appending an empty argument to LIBS is invalid! Skipping."
418 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 616 continue
419 export LDFLAGS
420 return 0
421}
422
423etexec-flags() {
424 # if you're not using a hardened compiler you wont need this
425 # PIC/no-pic kludge in the first place.
426 has_hardened || return 0
427 use amd64 && return 0
428 use mips && return 0
429
430 if has_pie || has_pic; then
431 [ -z "`is-flag -fno-pic`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
433 [ -z "`is-flag -nopie`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -nopie`"
435 fi 617 fi
436 return 0 618 case $flag in
437} 619 -[lL]*)
620 export LIBS="${LIBS} ${flag}"
621 ;;
622 -*)
623 eqawarn "Appending non-library to LIBS (${flag}); Other linker flags should be passed via LDFLAGS"
624 export LIBS="${LIBS} ${flag}"
625 ;;
626 *)
627 export LIBS="${LIBS} -l${flag}"
628 esac
629 done
438 630
439fstack-flags() {
440 if has_ssp; then
441 [ -z "`is-flag -fno-stack-protector`" ] &&
442 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
443 fi
444 return 0 631 return 0
445} 632}
446 633
447# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 634# @FUNCTION: raw-ldflags
448# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 635# @USAGE: [flags]
449# fixes. 636# @DESCRIPTION:
637# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
638# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
639# to gcc where it needs the '-Wl,'.
450# 640#
451# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 641# If no flags are specified, then default to ${LDFLAGS}.
452gcc2-flags() { 642raw-ldflags() {
453 CFLAGS=${CFLAGS//pentium-mmx/i586} 643 local x input="$@"
454 CFLAGS=${CFLAGS//pentium[234]/i686} 644 [[ -z ${input} ]] && input=${LDFLAGS}
455 CFLAGS=${CFLAGS//k6-[23]/k6} 645 set --
456 CFLAGS=${CFLAGS//athlon-tbird/i686} 646 for x in ${input} ; do
457 CFLAGS=${CFLAGS//athlon-4/i686} 647 case ${x} in
458 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 648 -Wl,*)
459 CFLAGS=${CFLAGS//athlon/i686} 649 x=${x#-Wl,}
650 set -- "$@" ${x//,/ }
651 ;;
652 *) # Assume it's a compiler driver flag, so throw it away #441808
653 ;;
654 esac
655 done
656 echo "$@"
657}
460 658
461 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 659# @FUNCTION: no-as-needed
462 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 660# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
463 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 661no-as-needed() {
464 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 662 case $($(tc-getLD) -v 2>&1 </dev/null) in
465 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 663 *GNU*) # GNU ld
466 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 664 echo "-Wl,--no-as-needed" ;;
467 CXXFLAGS=${CXXFLAGS//athlon/i686} 665 esac
666}
468 667
469 if [ "$ARCH" = alpha ]; then
470 CHOST=${CHOST/#alphaev6[78]/alphaev6}
471 CFLAGS=${CFLAGS//ev6[78]/ev6}
472 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
473 fi 668fi
474
475 export CFLAGS CXXFLAGS
476}

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