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1# Copyright 1999-2004 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 1.79 2004/12/25 18:45:56 chriswhite Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.164 2012/01/13 22:40:29 vapier Exp $
4
5# @ECLASS: flag-o-matic.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.
12
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
16inherit eutils toolchain-funcs multilib
17
18################ DEPRECATED functions ################
19# The following are still present to avoid breaking existing
20# code more than necessary; however they are deprecated. Please
21# use gcc-specs-* from toolchain-funcs.eclass instead, if you
22# need to know which hardened techs are active in the compiler.
23# See bug #100974
4# 24#
5# Author Bart Verwilst <verwilst@gentoo.org> 25# has_hardened
26# has_pie
27# has_pic
28# has_ssp_all
29# has_ssp
6 30
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9 31
10IUSE="debug"
11
12# need access to emktemp()
13inherit eutils toolchain-funcs
14
15#
16#### filter-flags <flags> ####
17# Remove particular flags from C[XX]FLAGS
18# Matches only complete flags
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
74# C[XX]FLAGS that we allow in strip-flags 32# {C,CXX,F,FC}FLAGS that we allow in strip-flags
33# Note: shell globs and character lists are allowed
75setup-allowed-flags() { 34setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then
77 export ALLOWED_FLAGS="-pipe" 35 ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 36 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 37 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 38 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 39 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
40 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
41 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
42 ALLOWED_FLAGS+=" -W* -w"
43
44 # allow a bunch of flags that negate features / control ABI
45 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
46 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47 -fno-omit-frame-pointer"
48 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
49 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
50 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
51 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
58
59 # 4.5
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"
63
64 export ALLOWED_FLAGS
65 return 0
66}
67
68# inverted filters for hardened compiler. This is trying to unpick
69# the hardened compiler defaults.
70_filter-hardened() {
71 local f
72 for f in "$@" ; do
82 case "${ARCH}" in 73 case "${f}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 74 # Ideally we should only concern ourselves with PIE flags,
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 75 # not -fPIC or -fpic, but too many places filter -fPIC without
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 76 # thinking about -fPIE.
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 77 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 78 gcc-specs-pie || continue
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 79 is-flagq -nopie || append-flags -nopie;;
89 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 80 -fstack-protector)
81 gcc-specs-ssp || continue
82 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
83 -fstack-protector-all)
84 gcc-specs-ssp-to-all || continue
85 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
86 -fno-strict-overflow)
87 gcc-specs-nostrict || continue
88 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
90 esac 89 esac
91 fi 90 done
92 # allow a bunch of flags that negate features / control ABI
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
94 case "${ARCH}" in
95 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
96 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"
98
99 # C[XX]FLAGS that we are think is ok, but needs testing
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
103} 91}
104 92
93# Remove occurrences of strings from variable given in $1
94# Strings removed are matched as globs, so for example
95# '-O*' would remove -O1, -O2 etc.
96_filter-var() {
97 local f x VAR VAL
98 declare -a new
99
100 VAR=$1
101 shift
102 eval VAL=\${${VAR}}
103 for f in ${VAL}; do
104 for x in "$@"; do
105 # Note this should work with globs like -O*
106 [[ ${f} == ${x} ]] && continue 2
107 done
108 eval new\[\${\#new\[@]}]=\${f}
109 done
110 eval export ${VAR}=\${new\[*]}
111}
112
113# @FUNCTION: filter-flags
114# @USAGE: <flags>
115# @DESCRIPTION:
116# Remove particular <flags> from {C,CPP,CXX,F,FC,LD}FLAGS. Accepts shell globs.
105filter-flags() { 117filter-flags() {
106 local x f fset 118 _filter-hardened "$@"
107 declare -a new_CFLAGS new_CXXFLAGS 119 local v
108 120 for v in C CPP CXX F FC LD ; do
109 for x in "$@" ; do 121 _filter-var ${v}FLAGS "$@"
110 case "${x}" in
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
118 # substitution ensures that we're working with flag atoms.
119 # Otherwise globs like -O* have the potential to wipe out the
120 # list of flags.
121 for f in ${!fset}; do
122 for x in "$@"; 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 122 done
128 eval export ${fset}=\${new_${fset}\[*]}
129 done
130
131 return 0 123 return 0
132} 124}
133 125
126# @FUNCTION: filter-lfs-flags
127# @DESCRIPTION:
128# Remove flags that enable Large File Support.
134filter-lfs-flags() { 129filter-lfs-flags() {
130 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
131 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
132 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
133 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
134 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 136}
137 137
138# @FUNCTION: append-cppflags
139# @USAGE: <flags>
140# @DESCRIPTION:
141# Add extra <flags> to the current CPPFLAGS.
142append-cppflags() {
143 [[ $# -eq 0 ]] && return 0
144 export CPPFLAGS="${CPPFLAGS} $*"
145 return 0
146}
147
148# @FUNCTION: append-cflags
149# @USAGE: <flags>
150# @DESCRIPTION:
151# Add extra <flags> to the current CFLAGS.
152append-cflags() {
153 [[ $# -eq 0 ]] && return 0
154 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
155 return 0
156}
157
158# @FUNCTION: append-cxxflags
159# @USAGE: <flags>
160# @DESCRIPTION:
161# Add extra <flags> to the current CXXFLAGS.
162append-cxxflags() {
163 [[ $# -eq 0 ]] && return 0
164 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
165 return 0
166}
167
168# @FUNCTION: append-fflags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to the current {F,FC}FLAGS.
172append-fflags() {
173 [[ $# -eq 0 ]] && return 0
174 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
175 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
176 return 0
177}
178
179# @FUNCTION: append-lfs-flags
180# @DESCRIPTION:
181# Add flags that enable Large File Support.
138append-lfs-flags() { 182append-lfs-flags() {
183 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
184 # see comments in filter-lfs-flags func for meaning of these
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 185 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140} 186}
141 187
188# @FUNCTION: append-flags
189# @USAGE: <flags>
190# @DESCRIPTION:
191# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
142append-flags() { 192append-flags() {
143 export CFLAGS="${CFLAGS} $*" 193 [[ $# -eq 0 ]] && return 0
144 export CXXFLAGS="${CXXFLAGS} $*" 194 append-cflags "$@"
145 [ -n "`is-flag -fno-stack-protector`" -o \ 195 append-cxxflags "$@"
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 196 append-fflags "$@"
147 return 0 197 return 0
148} 198}
149 199
200# @FUNCTION: replace-flags
201# @USAGE: <old> <new>
202# @DESCRIPTION:
203# Replace the <old> flag with <new>. Accepts shell globs for <old>.
150replace-flags() { 204replace-flags() {
205 [[ $# != 2 ]] \
206 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
207 && die "replace-flags takes 2 arguments, not $#"
208
151 local f fset 209 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS 210 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
153 211
154 for fset in CFLAGS CXXFLAGS; do 212 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
155 # Looping over the flags instead of using a global 213 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms. 214 # substitution ensures that we're working with flag atoms.
157 # Otherwise globs like -O* have the potential to wipe out the 215 # Otherwise globs like -O* have the potential to wipe out the
158 # list of flags. 216 # list of flags.
159 for f in ${!fset}; do 217 for f in ${!fset}; do
165 done 223 done
166 224
167 return 0 225 return 0
168} 226}
169 227
228# @FUNCTION: replace-cpu-flags
229# @USAGE: <old> <new>
230# @DESCRIPTION:
231# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
232# with flags that select the <new> cpu. Accepts shell globs for <old>.
170replace-cpu-flags() { 233replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}" 234 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do 235 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on 236 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags 237 # ${oldcpu}) prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}" 238 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 239 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 240 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift 241 shift
179 done 242 done
180 return 0 243 return 0
181} 244}
182 245
246_is_flagq() {
247 local x
248 for x in ${!1} ; do
249 [[ ${x} == $2 ]] && return 0
250 done
251 return 1
252}
253
254# @FUNCTION: is-flagq
255# @USAGE: <flag>
256# @DESCRIPTION:
257# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
258is-flagq() {
259 [[ -n $2 ]] && die "Usage: is-flag <flag>"
260 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
261}
262
263# @FUNCTION: is-flag
264# @USAGE: <flag>
265# @DESCRIPTION:
266# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
183is-flag() { 267is-flag() {
184 local x 268 is-flagq "$@" && 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} 269}
195 270
271# @FUNCTION: is-ldflagq
272# @USAGE: <flag>
273# @DESCRIPTION:
274# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
275is-ldflagq() {
276 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
277 _is_flagq LDFLAGS $1
278}
279
280# @FUNCTION: is-ldflag
281# @USAGE: <flag>
282# @DESCRIPTION:
283# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
284is-ldflag() {
285 is-ldflagq "$@" && echo true
286}
287
288# @FUNCTION: filter-mfpmath
289# @USAGE: <math types>
290# @DESCRIPTION:
291# Remove specified math types from the fpmath flag. For example, if the user
292# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
293# -mfpmath=386.
196filter-mfpmath() { 294filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 295 local orig_mfpmath new_math prune_math
198 296
199 # save the original -mfpmath flag 297 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 298 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 299 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 300 new_math=$(get-flag mfpmath)
301 new_math=" ${new_math//,/ } "
203 # figure out which math values are to be removed 302 # figure out which math values are to be removed
204 prune_math="" 303 prune_math=""
205 for prune_math in "$@" ; do 304 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 305 new_math=${new_math/ ${prune_math} / }
207 done 306 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 307 new_math=$(echo ${new_math})
308 new_math=${new_math// /,}
209 309
210 if [ -z "${new_math}" ] ; then 310 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 311 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 312 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 313 filter-flags ${orig_mfpmath}
214 else 314 else
215 # if we only want to filter some of the user specified 315 # if we only want to filter some of the user specified
217 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 317 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218 fi 318 fi
219 return 0 319 return 0
220} 320}
221 321
322# @FUNCTION: strip-flags
323# @DESCRIPTION:
324# Strip C[XX]FLAGS of everything except known good/safe flags.
222strip-flags() { 325strip-flags() {
223 local x y flag NEW_CFLAGS NEW_CXXFLAGS 326 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
224 327
225 setup-allowed-flags 328 setup-allowed-flags
226 329
227 local NEW_CFLAGS="" 330 local NEW_CFLAGS=""
228 local NEW_CXXFLAGS="" 331 local NEW_CXXFLAGS=""
229 332 local NEW_FFLAGS=""
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 333 local NEW_FCFLAGS=""
231 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
232 use debug && einfo "Enabling the use of some unstable flags"
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234 fi
235 334
236 set -f # disable pathname expansion 335 set -f # disable pathname expansion
237 336
238 for x in ${CFLAGS}; do 337 for x in ${CFLAGS}; do
239 for y in ${ALLOWED_FLAGS}; do 338 for y in ${ALLOWED_FLAGS}; do
253 break 352 break
254 fi 353 fi
255 done 354 done
256 done 355 done
257 356
357 for x in ${FFLAGS}; do
358 for y in ${ALLOWED_FLAGS}; do
359 flag=${x%%=*}
360 if [ "${flag%%${y}}" = "" ] ; then
361 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
362 break
363 fi
364 done
365 done
366
367 for x in ${FCFLAGS}; do
368 for y in ${ALLOWED_FLAGS}; do
369 flag=${x%%=*}
370 if [ "${flag%%${y}}" = "" ] ; then
371 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
372 break
373 fi
374 done
375 done
376
258 # In case we filtered out all optimization flags fallback to -O2 377 # In case we filtered out all optimization flags fallback to -O2
259 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 378 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
260 NEW_CFLAGS="${NEW_CFLAGS} -O2" 379 NEW_CFLAGS="${NEW_CFLAGS} -O2"
261 fi 380 fi
262 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 381 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 382 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264 fi 383 fi
384 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
385 NEW_FFLAGS="${NEW_FFLAGS} -O2"
386 fi
387 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
388 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
389 fi
265 390
266 set +f # re-enable pathname expansion 391 set +f # re-enable pathname expansion
267 392
268 export CFLAGS="${NEW_CFLAGS}" 393 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}" 394 export CXXFLAGS="${NEW_CXXFLAGS}"
270 return 0 395 export FFLAGS="${NEW_FFLAGS}"
271} 396 export FCFLAGS="${NEW_FCFLAGS}"
272
273test_flag() {
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
275 printf "%s\n" "$*"
276 return 0 397 return 0
277 fi
278 return 1
279} 398}
280 399
400test-flag-PROG() {
401 local comp=$1
402 local flags="$2"
403
404 [[ -z ${comp} || -z ${flags} ]] && return 1
405
406 # use -c so we can test the assembler as well
407 local PROG=$(tc-get${comp})
408 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
409 > /dev/null 2>&1
410}
411
412# @FUNCTION: test-flag-CC
413# @USAGE: <flag>
414# @DESCRIPTION:
415# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
416test-flag-CC() { test-flag-PROG "CC" "$1"; }
417
418# @FUNCTION: test-flag-CXX
419# @USAGE: <flag>
420# @DESCRIPTION:
421# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
422test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
423
424# @FUNCTION: test-flag-F77
425# @USAGE: <flag>
426# @DESCRIPTION:
427# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
428test-flag-F77() { test-flag-PROG "F77" "$1"; }
429
430# @FUNCTION: test-flag-FC
431# @USAGE: <flag>
432# @DESCRIPTION:
433# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
434test-flag-FC() { test-flag-PROG "FC" "$1"; }
435
436test-flags-PROG() {
437 local comp=$1
438 local flags
439 local x
440
441 shift
442
443 [[ -z ${comp} ]] && return 1
444
445 for x in "$@" ; do
446 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
447 done
448
449 echo "${flags}"
450
451 # Just bail if we dont have any flags
452 [[ -n ${flags} ]]
453}
454
455# @FUNCTION: test-flags-CC
456# @USAGE: <flags>
457# @DESCRIPTION:
458# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
459test-flags-CC() { test-flags-PROG "CC" "$@"; }
460
461# @FUNCTION: test-flags-CXX
462# @USAGE: <flags>
463# @DESCRIPTION:
464# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
465test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
466
467# @FUNCTION: test-flags-F77
468# @USAGE: <flags>
469# @DESCRIPTION:
470# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
471test-flags-F77() { test-flags-PROG "F77" "$@"; }
472
473# @FUNCTION: test-flags-FC
474# @USAGE: <flags>
475# @DESCRIPTION:
476# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
477test-flags-FC() { test-flags-PROG "FC" "$@"; }
478
479# @FUNCTION: test-flags
480# @USAGE: <flags>
481# @DESCRIPTION:
482# Short-hand that should hopefully work for both C and C++ compiler, but
483# its really only present due to the append-flags() abomination.
484test-flags() { test-flags-CC "$@"; }
485
486# @FUNCTION: test_version_info
487# @USAGE: <version>
488# @DESCRIPTION:
489# Returns shell true if the current C compiler version matches <version>, else returns shell false.
490# Accepts shell globs.
281test_version_info() { 491test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 492 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 493 return 0
284 else 494 else
285 return 1 495 return 1
286 fi 496 fi
287} 497}
288 498
499# @FUNCTION: strip-unsupported-flags
500# @DESCRIPTION:
501# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
289strip-unsupported-flags() { 502strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 503 export CFLAGS=$(test-flags-CC ${CFLAGS})
291 504 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
292 for x in ${CFLAGS} ; do 505 export FFLAGS=$(test-flags-F77 ${FFLAGS})
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 506 export FCFLAGS=$(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} 507}
302 508
509# @FUNCTION: get-flag
510# @USAGE: <flag>
511# @DESCRIPTION:
512# Find and echo the value for a particular flag. Accepts shell globs.
303get-flag() { 513get-flag() {
304 local f findflag="$1" 514 local f findflag="$1"
305 515
306 # this code looks a little flaky but seems to work for 516 # this code looks a little flaky but seems to work for
307 # everything we want ... 517 # everything we want ...
308 # for example, if CFLAGS="-march=i686": 518 # for example, if CFLAGS="-march=i686":
309 # `get-flag -march` == "-march=i686" 519 # `get-flag -march` == "-march=i686"
310 # `get-flag march` == "i686" 520 # `get-flag march` == "i686"
311 for f in ${CFLAGS} ${CXXFLAGS} ; do 521 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
312 if [ "${f/${findflag}}" != "${f}" ] ; then 522 if [ "${f/${findflag}}" != "${f}" ] ; then
313 printf "%s\n" "${f/-${findflag}=}" 523 printf "%s\n" "${f/-${findflag}=}"
314 return 0 524 return 0
315 fi 525 fi
316 done 526 done
317 return 1 527 return 1
318} 528}
319 529
320has_hardened() { 530# DEAD FUNCS. Remove by Dec 2011.
321 test_version_info Hardened && return 0 531test_flag() { die "$0: deprecated, please use test-flags()!" ; }
322 # the specs file wont exist unless gcc has GCC_SPECS support 532has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 533has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
324 return 0 534has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
325 return 1 535has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
326} 536has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
327 537
328has_pic() { 538# @FUNCTION: has_m64
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 539# @DESCRIPTION:
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 540# This doesn't test if the flag is accepted, it tests if the flag actually
331 test_version_info pie && return 0 541# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
332 return 1 542# return code is 0, else the return code is 1.
333}
334
335has_pie() {
336 [ "${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}" != "${CFLAGS}" ] && return 0
344 test_version_info ssp && return 0
345 return 1
346}
347
348has_m64() { 543has_m64() {
349 # this doesnt test if the flag is accepted, it tests if the flag 544 # this doesnt test if the flag is accepted, it tests if the flag
350 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 545 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
351 # please dont replace this function with test_flag in some future 546 # please dont replace this function with test_flag in some future
352 # clean-up! 547 # clean-up!
548
353 local temp="$(emktemp)" 549 local temp="$(emktemp)"
354 echo "int main() { return(0); }" > ${temp}.c 550 echo "int main() { return(0); }" > "${temp}".c
355 MY_CC=$(tc-getCC) 551 MY_CC=$(tc-getCC)
356 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 552 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
357 local ret=$? 553 local ret=$?
358 rm -f ${temp}.c 554 rm -f "${temp}".c
359 [ "$ret" != "1" ] && return 0 555 [[ ${ret} != 1 ]] && return 0
360 return 1 556 return 1
361} 557}
362 558
559# @FUNCTION: has_m32
560# @DESCRIPTION:
561# This doesn't test if the flag is accepted, it tests if the flag actually
562# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
563# code is 0, else return code is 1.
363has_m32() { 564has_m32() {
364 # this doesnt test if the flag is accepted, it tests if the flag 565 # this doesnt test if the flag is accepted, it tests if the flag
365 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 566 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366 # please dont replace this function with test_flag in some future 567 # please dont replace this function with test_flag in some future
367 # clean-up! 568 # clean-up!
569
570 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
571
368 local temp="$(emktemp)" 572 local temp=$(emktemp)
369 echo "int main() { return(0); }" > ${temp}.c 573 echo "int main() { return(0); }" > "${temp}".c
370 MY_CC=$(tc-getCC) 574 MY_CC=$(tc-getCC)
371 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 575 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
372 local ret=$? 576 local ret=$?
373 rm -f ${temp}.c 577 rm -f "${temp}".c
374 [ "$ret" != "1" ] && return 0 578 [[ ${ret} != 1 ]] && return 0
375 return 1 579 return 1
376} 580}
377 581
582# @FUNCTION: replace-sparc64-flags
583# @DESCRIPTION:
584# Sets mcpu to v8 and uses the original value as mtune if none specified.
378replace-sparc64-flags() { 585replace-sparc64-flags() {
379 local SPARC64_CPUS="ultrasparc v9" 586 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
380 587
381 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 588 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382 for x in ${SPARC64_CPUS}; do 589 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 590 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384 done 591 done
385 else 592 else
386 for x in ${SPARC64_CPUS}; do 593 for x in ${SPARC64_CPUS}; do
387 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 594 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388 done 595 done
389 fi 596 fi
390 597
391 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 598 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392 for x in ${SPARC64_CPUS}; do 599 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 600 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394 done 601 done
395 else 602 else
396 for x in ${SPARC64_CPUS}; do 603 for x in ${SPARC64_CPUS}; do
397 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 604 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
398 done 605 done
399 fi 606 fi
400 607
401 export CFLAGS CXXFLAGS 608 export CFLAGS CXXFLAGS
402} 609}
403 610
611# @FUNCTION: append-libs
612# @USAGE: <libs>
613# @DESCRIPTION:
614# Add extra <libs> to the current LIBS.
615append-libs() {
616 [[ $# -eq 0 ]] && return 0
617 local flag
618 for flag in "$@"; do
619 [[ ${flag} == -l* ]] && flag=${flag#-l}
620 export LIBS="${LIBS} -l${flag}"
621 done
622
623 return 0
624}
625
626# @FUNCTION: append-ldflags
627# @USAGE: <flags>
628# @DESCRIPTION:
629# Add extra <flags> to the current LDFLAGS.
404append-ldflags() { 630append-ldflags() {
631 [[ $# -eq 0 ]] && return 0
632 local flag
633 for flag in "$@"; do
634 [[ ${flag} == -l* ]] && \
635 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
636 done
637
405 export LDFLAGS="${LDFLAGS} $*" 638 export LDFLAGS="${LDFLAGS} $*"
406 return 0 639 return 0
407} 640}
408 641
642# @FUNCTION: filter-ldflags
643# @USAGE: <flags>
644# @DESCRIPTION:
645# Remove particular <flags> from LDFLAGS. Accepts shell globs.
409filter-ldflags() { 646filter-ldflags() {
410 local x 647 _filter-var LDFLAGS "$@"
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
416 LDFLAGS="${LDFLAGS// ${x} / }"
417 done
418 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
419 export LDFLAGS
420 return 0 648 return 0
421} 649}
422 650
423etexec-flags() { 651# @FUNCTION: raw-ldflags
424 # if you're not using a hardened compiler you wont need this 652# @USAGE: [flags]
425 # PIC/no-pic kludge in the first place. 653# @DESCRIPTION:
426 has_hardened || return 0 654# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
427 use amd64 && return 0 655# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
428 use mips && return 0 656# to gcc where it needs the '-Wl,'.
429
430 if has_pie || has_pic; then
431 [ -z "`is-flag -fno-pic`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
433 [ -z "`is-flag -nopie`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -nopie`"
435 fi
436 return 0
437}
438
439fstack-flags() {
440 if has_ssp; then
441 [ -z "`is-flag -fno-stack-protector`" ] &&
442 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
443 fi
444 return 0
445}
446
447# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
448# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
449# fixes.
450# 657#
451# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 658# If no flags are specified, then default to ${LDFLAGS}.
452gcc2-flags() { 659raw-ldflags() {
453 CFLAGS=${CFLAGS//pentium-mmx/i586} 660 local x input="$@"
454 CFLAGS=${CFLAGS//pentium[234]/i686} 661 [[ -z ${input} ]] && input=${LDFLAGS}
455 CFLAGS=${CFLAGS//k6-[23]/k6} 662 set --
456 CFLAGS=${CFLAGS//athlon-tbird/i686} 663 for x in ${input} ; do
457 CFLAGS=${CFLAGS//athlon-4/i686} 664 x=${x#-Wl,}
458 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 665 set -- "$@" ${x//,/ }
459 CFLAGS=${CFLAGS//athlon/i686} 666 done
667 echo "$@"
668}
460 669
461 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 670# @FUNCTION: no-as-needed
462 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 671# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
463 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 672no-as-needed() {
464 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 673 case $($(tc-getLD) -v 2>&1 </dev/null) in
465 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 674 *GNU*) # GNU ld
466 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 675 echo "-Wl,--no-as-needed" ;;
467 CXXFLAGS=${CXXFLAGS//athlon/i686} 676 esac
677}
468 678
469 if [ "$ARCH" = alpha ]; then
470 CHOST=${CHOST/#alphaev6[78]/alphaev6}
471 CFLAGS=${CFLAGS//ev6[78]/ev6}
472 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
473 fi 679fi
474
475 export CFLAGS CXXFLAGS
476}

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