/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.65 Revision 1.163
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 1.65 2004/07/27 19:25:49 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.163 2011/12/28 06:28:55 dirtyepic 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
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
12IUSE="${IUSE} debug"
13
14#
15#### filter-flags <flags> ####
16# Remove particular flags from C[XX]FLAGS
17# Matches only complete flags
18#
19#### append-flags <flags> ####
20# Add extra flags to your current C[XX]FLAGS
21#
22#### replace-flags <orig.flag> <new.flag> ###
23# Replace a flag by another one
24#
25#### replace-cpu-flags <new.cpu> <old.cpus> ###
26# Replace march/mcpu flags that specify <old.cpus>
27# with flags that specify <new.cpu>
28#
29#### is-flag <flag> ####
30# Returns "true" if flag is set in C[XX]FLAGS
31# Matches only complete a flag
32#
33#### strip-flags ####
34# Strip C[XX]FLAGS of everything except known
35# good options.
36#
37#### strip-unsupported-flags ####
38# Strip C[XX]FLAGS of any flags not supported by
39# installed version of gcc
40#
41#### get-flag <flag> ####
42# Find and echo the value for a particular flag
43#
44#### replace-sparc64-flags ####
45# Sets mcpu to v8 and uses the original value
46# as mtune if none specified.
47#
48#### filter-mfpmath <math types> ####
49# Remove specified math types from the fpmath specification
50# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
51# will leave the user with -mfpmath=386
52#
53#### append-ldflags ####
54# Add extra flags to your current LDFLAGS
55#
56#### filter-ldflags <flags> ####
57# Remove particular flags from LDFLAGS
58# Matches only complete flags
59#
60#### etexec-flags ####
61# hooked function for hardened gcc that appends
62# -fno-pic to {C,CXX,LD}FLAGS
63# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
64#
65#### fstack-flags ####
66# hooked function for hardened gcc that appends
67# -fno-stack-protector to {C,CXX,LD}FLAGS
68# when a package is filtering -fstack-protector, -fstack-protector-all
69# notice: modern automatic specs files will also suppress -fstack-protector-all
70# when only -fno-stack-protector is given
71#
72
73# 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
74setup-allowed-flags() { 34setup-allowed-flags() {
75 if [ -z "${ALLOWED_FLAGS}" ] ; then 35 ALLOWED_FLAGS="-pipe"
76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 36 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
37 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
38 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
39 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
40 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
41 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
42 ALLOWED_FLAGS+=" -W* -w"
43
44 # allow a bunch of flags that negate features / control ABI
45 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
46 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47 -fno-omit-frame-pointer"
48 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
49 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
50 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
51 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
58
59 # 4.5
60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
61 # 4.6
62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
63
64 export ALLOWED_FLAGS
65 return 0
66}
67
68# inverted filters for hardened compiler. This is trying to unpick
69# the hardened compiler defaults.
70_filter-hardened() {
71 local f
72 for f in "$@" ; do
77 case "${ARCH}" in 73 case "${f}" in
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 74 # Ideally we should only concern ourselves with PIE flags,
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 75 # not -fPIC or -fpic, but too many places filter -fPIC without
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 76 # thinking about -fPIE.
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 77 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 78 gcc-specs-pie || continue
79 is-flagq -nopie || append-flags -nopie;;
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 $(test-flags -fstrict-overflow);;
83 esac 89 esac
84 fi 90 done
85 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
87 case "${ARCH}" in
88 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
89 esac
90 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"
91
92 # C[XX]FLAGS that we are think is ok, but needs testing
93 # NOTE: currently -Os have issues with gcc3 and K6* arch's
94 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
95 return 0
96} 91}
97 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}FLAGS. Accepts shell globs.
98filter-flags() { 117filter-flags() {
99 local x f fset 118 _filter-hardened "$@"
100 declare -a new_CFLAGS new_CXXFLAGS 119 _filter-var CFLAGS "$@"
101 120 _filter-var CPPFLAGS "$@"
102 for x in "$@" ; do 121 _filter-var CXXFLAGS "$@"
103 case "${x}" in 122 _filter-var FFLAGS "$@"
104 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 123 _filter-var FCFLAGS "$@"
105 -fstack-protector|-fstack-protector-all) fstack-flags;;
106 esac
107 done
108
109 for fset in CFLAGS CXXFLAGS; do
110 # Looping over the flags instead of using a global
111 # substitution ensures that we're working with flag atoms.
112 # Otherwise globs like -O* have the potential to wipe out the
113 # list of flags.
114 for f in ${!fset}; do
115 for x in "$@"; do
116 # Note this should work with globs like -O*
117 [[ ${f} == ${x} ]] && continue 2
118 done
119 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
120 done
121 eval export ${fset}=\${new_${fset}\[*]}
122 done
123
124 return 0 124 return 0
125} 125}
126 126
127# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION:
129# Remove flags that enable Large File Support.
127filter-lfs-flags() { 130filter-lfs-flags() {
131 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
132 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
133 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
134 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
135 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
128 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 136 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
129} 137}
130 138
139# @FUNCTION: append-cppflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CPPFLAGS.
143append-cppflags() {
144 [[ $# -eq 0 ]] && return 0
145 export CPPFLAGS="${CPPFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-cflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current CFLAGS.
153append-cflags() {
154 [[ $# -eq 0 ]] && return 0
155 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
156 return 0
157}
158
159# @FUNCTION: append-cxxflags
160# @USAGE: <flags>
161# @DESCRIPTION:
162# Add extra <flags> to the current CXXFLAGS.
163append-cxxflags() {
164 [[ $# -eq 0 ]] && return 0
165 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
166 return 0
167}
168
169# @FUNCTION: append-fflags
170# @USAGE: <flags>
171# @DESCRIPTION:
172# Add extra <flags> to the current {F,FC}FLAGS.
173append-fflags() {
174 [[ $# -eq 0 ]] && return 0
175 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
176 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
177 return 0
178}
179
180# @FUNCTION: append-lfs-flags
181# @DESCRIPTION:
182# Add flags that enable Large File Support.
131append-lfs-flags() { 183append-lfs-flags() {
184 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
185 # see comments in filter-lfs-flags func for meaning of these
132 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 186 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
133} 187}
134 188
189# @FUNCTION: append-flags
190# @USAGE: <flags>
191# @DESCRIPTION:
192# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
135append-flags() { 193append-flags() {
136 export CFLAGS="${CFLAGS} $*" 194 [[ $# -eq 0 ]] && return 0
137 export CXXFLAGS="${CXXFLAGS} $*" 195 append-cflags "$@"
138 [ -n "`is-flag -fno-stack-protector`" -o \ 196 append-cxxflags "$@"
139 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 197 append-fflags "$@"
140 return 0 198 return 0
141} 199}
142 200
201# @FUNCTION: replace-flags
202# @USAGE: <old> <new>
203# @DESCRIPTION:
204# Replace the <old> flag with <new>. Accepts shell globs for <old>.
143replace-flags() { 205replace-flags() {
206 [[ $# != 2 ]] \
207 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
208 && die "replace-flags takes 2 arguments, not $#"
209
144 local f fset 210 local f fset
145 declare -a new_CFLAGS new_CXXFLAGS 211 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
146 212
147 for fset in CFLAGS CXXFLAGS; do 213 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
148 # Looping over the flags instead of using a global 214 # Looping over the flags instead of using a global
149 # substitution ensures that we're working with flag atoms. 215 # substitution ensures that we're working with flag atoms.
150 # Otherwise globs like -O* have the potential to wipe out the 216 # Otherwise globs like -O* have the potential to wipe out the
151 # list of flags. 217 # list of flags.
152 for f in ${!fset}; do 218 for f in ${!fset}; do
158 done 224 done
159 225
160 return 0 226 return 0
161} 227}
162 228
229# @FUNCTION: replace-cpu-flags
230# @USAGE: <old> <new>
231# @DESCRIPTION:
232# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
233# with flags that select the <new> cpu. Accepts shell globs for <old>.
163replace-cpu-flags() { 234replace-cpu-flags() {
164 local oldcpu newcpu="$1" ; shift 235 local newcpu="$#" ; newcpu="${!newcpu}"
165 for oldcpu in "$@" ; do 236 while [ $# -gt 1 ] ; do
166 # quote to make sure that no globbing is done (particularly on 237 # quote to make sure that no globbing is done (particularly on
167 # ${oldcpu} prior to calling replace-flags 238 # ${oldcpu}) prior to calling replace-flags
168 replace-flags "-march=${oldcpu}" "-march=${newcpu}" 239 replace-flags "-march=${1}" "-march=${newcpu}"
169 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}" 240 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
170 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}" 241 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
242 shift
171 done 243 done
244 return 0
245}
246
247_is_flagq() {
248 local x
249 for x in ${!1} ; do
250 [[ ${x} == $2 ]] && return 0
251 done
172 return 0 252 return 1
173} 253}
174 254
255# @FUNCTION: is-flagq
256# @USAGE: <flag>
257# @DESCRIPTION:
258# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
259is-flagq() {
260 [[ -n $2 ]] && die "Usage: is-flag <flag>"
261 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
262}
263
264# @FUNCTION: is-flag
265# @USAGE: <flag>
266# @DESCRIPTION:
267# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
175is-flag() { 268is-flag() {
176 local x 269 is-flagq "$@" && echo true
177
178 for x in ${CFLAGS} ${CXXFLAGS} ; do
179 if [ "${x}" == "$1" ] ; then
180 echo true
181 return 0
182 fi
183 done
184 return 1
185} 270}
186 271
272# @FUNCTION: is-ldflagq
273# @USAGE: <flag>
274# @DESCRIPTION:
275# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
276is-ldflagq() {
277 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
278 _is_flagq LDFLAGS $1
279}
280
281# @FUNCTION: is-ldflag
282# @USAGE: <flag>
283# @DESCRIPTION:
284# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
285is-ldflag() {
286 is-ldflagq "$@" && echo true
287}
288
289# @FUNCTION: filter-mfpmath
290# @USAGE: <math types>
291# @DESCRIPTION:
292# Remove specified math types from the fpmath flag. For example, if the user
293# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
294# -mfpmath=386.
187filter-mfpmath() { 295filter-mfpmath() {
188 local orig_mfpmath new_math prune_math 296 local orig_mfpmath new_math prune_math
189 297
190 # save the original -mfpmath flag 298 # save the original -mfpmath flag
191 orig_mfpmath="`get-flag -mfpmath`" 299 orig_mfpmath=$(get-flag -mfpmath)
192 # get the value of the current -mfpmath flag 300 # get the value of the current -mfpmath flag
193 new_math=" `get-flag mfpmath | tr , ' '` " 301 new_math=$(get-flag mfpmath)
302 new_math=" ${new_math//,/ } "
194 # figure out which math values are to be removed 303 # figure out which math values are to be removed
195 prune_math="" 304 prune_math=""
196 for prune_math in "$@" ; do 305 for prune_math in "$@" ; do
197 new_math="${new_math/ ${prune_math} / }" 306 new_math=${new_math/ ${prune_math} / }
198 done 307 done
199 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 308 new_math=$(echo ${new_math})
309 new_math=${new_math// /,}
200 310
201 if [ -z "${new_math}" ] ; then 311 if [[ -z ${new_math} ]] ; then
202 # if we're removing all user specified math values are 312 # if we're removing all user specified math values are
203 # slated for removal, then we just filter the flag 313 # slated for removal, then we just filter the flag
204 filter-flags ${orig_mfpmath} 314 filter-flags ${orig_mfpmath}
205 else 315 else
206 # if we only want to filter some of the user specified 316 # if we only want to filter some of the user specified
208 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 318 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
209 fi 319 fi
210 return 0 320 return 0
211} 321}
212 322
323# @FUNCTION: strip-flags
324# @DESCRIPTION:
325# Strip C[XX]FLAGS of everything except known good/safe flags.
213strip-flags() { 326strip-flags() {
214 local x y flag NEW_CFLAGS NEW_CXXFLAGS 327 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
215 328
216 setup-allowed-flags 329 setup-allowed-flags
217 330
218 local NEW_CFLAGS="" 331 local NEW_CFLAGS=""
219 local NEW_CXXFLAGS="" 332 local NEW_CXXFLAGS=""
220 333 local NEW_FFLAGS=""
221 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 334 local NEW_FCFLAGS=""
222 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
223 use debug && einfo "Enabling the use of some unstable flags"
224 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
225 fi
226 335
227 set -f # disable pathname expansion 336 set -f # disable pathname expansion
228 337
229 for x in ${CFLAGS}; do 338 for x in ${CFLAGS}; do
230 for y in ${ALLOWED_FLAGS}; do 339 for y in ${ALLOWED_FLAGS}; do
244 break 353 break
245 fi 354 fi
246 done 355 done
247 done 356 done
248 357
358 for x in ${FFLAGS}; do
359 for y in ${ALLOWED_FLAGS}; do
360 flag=${x%%=*}
361 if [ "${flag%%${y}}" = "" ] ; then
362 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
363 break
364 fi
365 done
366 done
367
368 for x in ${FCFLAGS}; do
369 for y in ${ALLOWED_FLAGS}; do
370 flag=${x%%=*}
371 if [ "${flag%%${y}}" = "" ] ; then
372 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
373 break
374 fi
375 done
376 done
377
249 # In case we filtered out all optimization flags fallback to -O2 378 # In case we filtered out all optimization flags fallback to -O2
250 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 379 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
251 NEW_CFLAGS="${NEW_CFLAGS} -O2" 380 NEW_CFLAGS="${NEW_CFLAGS} -O2"
252 fi 381 fi
253 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 382 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
254 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 383 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
255 fi 384 fi
385 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
386 NEW_FFLAGS="${NEW_FFLAGS} -O2"
387 fi
388 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
389 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
390 fi
256 391
257 set +f # re-enable pathname expansion 392 set +f # re-enable pathname expansion
258 393
259 export CFLAGS="${NEW_CFLAGS}" 394 export CFLAGS="${NEW_CFLAGS}"
260 export CXXFLAGS="${NEW_CXXFLAGS}" 395 export CXXFLAGS="${NEW_CXXFLAGS}"
261 return 0 396 export FFLAGS="${NEW_FFLAGS}"
262} 397 export FCFLAGS="${NEW_FCFLAGS}"
263
264test_flag() {
265 local cc=${CC:-gcc} ; cc=${cc%% *}
266 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
267 printf "%s\n" "$*"
268 return 0 398 return 0
269 fi
270 return 1
271} 399}
272 400
401test-flag-PROG() {
402 local comp=$1
403 local flags="$2"
404
405 [[ -z ${comp} || -z ${flags} ]] && return 1
406
407 # use -c so we can test the assembler as well
408 local PROG=$(tc-get${comp})
409 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
410 > /dev/null 2>&1
411}
412
413# @FUNCTION: test-flag-CC
414# @USAGE: <flag>
415# @DESCRIPTION:
416# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
417test-flag-CC() { test-flag-PROG "CC" "$1"; }
418
419# @FUNCTION: test-flag-CXX
420# @USAGE: <flag>
421# @DESCRIPTION:
422# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
423test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
424
425# @FUNCTION: test-flag-F77
426# @USAGE: <flag>
427# @DESCRIPTION:
428# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
429test-flag-F77() { test-flag-PROG "F77" "$1"; }
430
431# @FUNCTION: test-flag-FC
432# @USAGE: <flag>
433# @DESCRIPTION:
434# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
435test-flag-FC() { test-flag-PROG "FC" "$1"; }
436
437test-flags-PROG() {
438 local comp=$1
439 local flags
440 local x
441
442 shift
443
444 [[ -z ${comp} ]] && return 1
445
446 for x in "$@" ; do
447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
448 done
449
450 echo "${flags}"
451
452 # Just bail if we dont have any flags
453 [[ -n ${flags} ]]
454}
455
456# @FUNCTION: test-flags-CC
457# @USAGE: <flags>
458# @DESCRIPTION:
459# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
460test-flags-CC() { test-flags-PROG "CC" "$@"; }
461
462# @FUNCTION: test-flags-CXX
463# @USAGE: <flags>
464# @DESCRIPTION:
465# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
466test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
467
468# @FUNCTION: test-flags-F77
469# @USAGE: <flags>
470# @DESCRIPTION:
471# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
472test-flags-F77() { test-flags-PROG "F77" "$@"; }
473
474# @FUNCTION: test-flags-FC
475# @USAGE: <flags>
476# @DESCRIPTION:
477# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
478test-flags-FC() { test-flags-PROG "FC" "$@"; }
479
480# @FUNCTION: test-flags
481# @USAGE: <flags>
482# @DESCRIPTION:
483# Short-hand that should hopefully work for both C and C++ compiler, but
484# its really only present due to the append-flags() abomination.
485test-flags() { test-flags-CC "$@"; }
486
487# @FUNCTION: test_version_info
488# @USAGE: <version>
489# @DESCRIPTION:
490# Returns shell true if the current C compiler version matches <version>, else returns shell false.
491# Accepts shell globs.
273test_version_info() { 492test_version_info() {
274 local cc=${CC:-gcc} ; cc=${cc%% *}
275 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 493 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
276 return 0 494 return 0
277 else 495 else
278 return 1 496 return 1
279 fi 497 fi
280} 498}
281 499
500# @FUNCTION: strip-unsupported-flags
501# @DESCRIPTION:
502# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
282strip-unsupported-flags() { 503strip-unsupported-flags() {
283 local NEW_CFLAGS NEW_CXXFLAGS 504 export CFLAGS=$(test-flags-CC ${CFLAGS})
284 505 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
285 for x in ${CFLAGS} ; do 506 export FFLAGS=$(test-flags-F77 ${FFLAGS})
286 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 507 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
287 done
288 for x in ${CXXFLAGS} ; do
289 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
290 done
291
292 export CFLAGS="${NEW_CFLAGS}"
293 export CXXFLAGS="${NEW_CXXFLAGS}"
294} 508}
295 509
510# @FUNCTION: get-flag
511# @USAGE: <flag>
512# @DESCRIPTION:
513# Find and echo the value for a particular flag. Accepts shell globs.
296get-flag() { 514get-flag() {
297 local f findflag="$1" 515 local f findflag="$1"
298 516
299 # this code looks a little flaky but seems to work for 517 # this code looks a little flaky but seems to work for
300 # everything we want ... 518 # everything we want ...
301 # for example, if CFLAGS="-march=i686": 519 # for example, if CFLAGS="-march=i686":
302 # `get-flag -march` == "-march=i686" 520 # `get-flag -march` == "-march=i686"
303 # `get-flag march` == "i686" 521 # `get-flag march` == "i686"
304 for f in ${CFLAGS} ${CXXFLAGS} ; do 522 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
305 if [ "${f/${findflag}}" != "${f}" ] ; then 523 if [ "${f/${findflag}}" != "${f}" ] ; then
306 printf "%s\n" "${f/-${findflag}=}" 524 printf "%s\n" "${f/-${findflag}=}"
307 return 0 525 return 0
308 fi 526 fi
309 done 527 done
310 return 1 528 return 1
311} 529}
312 530
313has_hardened() { 531# DEAD FUNCS. Remove by Dec 2011.
314 test_version_info Hardened 532test_flag() { die "$0: deprecated, please use test-flags()!" ; }
315 return $? 533has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
316} 534has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
535has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
536has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
537has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
317 538
318has_pic() { 539# @FUNCTION: has_m64
319 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 540# @DESCRIPTION:
320 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 541# This doesn't test if the flag is accepted, it tests if the flag actually
321 test_version_info pie && return 0 542# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
322 return 1 543# return code is 0, else the return code is 1.
323}
324
325has_pie() {
326 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
327 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
328 test_version_info pie && return 0
329 return 1
330}
331
332has_ssp() {
333 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
334 test_version_info ssp && return 0
335 return 1
336}
337
338has_m64() { 544has_m64() {
339 # this doesnt test if the flag is accepted, it tests if the flag 545 # this doesnt test if the flag is accepted, it tests if the flag
340 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 546 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
341 # please dont replace this function with test_flag in some future 547 # please dont replace this function with test_flag in some future
342 # clean-up! 548 # clean-up!
343 temp=`mktemp` 549
550 local temp="$(emktemp)"
344 echo "int main() { return(0); }" > ${temp}.c 551 echo "int main() { return(0); }" > "${temp}".c
345 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 552 MY_CC=$(tc-getCC)
346 ret=$? 553 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
554 local ret=$?
347 rm -f ${temp}.c 555 rm -f "${temp}".c
348 [ "$ret" != "1" ] && return 0 556 [[ ${ret} != 1 ]] && return 0
349 return 1 557 return 1
350} 558}
351 559
560# @FUNCTION: has_m32
561# @DESCRIPTION:
562# This doesn't test if the flag is accepted, it tests if the flag actually
563# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
564# code is 0, else return code is 1.
352has_m32() { 565has_m32() {
353 # this doesnt test if the flag is accepted, it tests if the flag 566 # this doesnt test if the flag is accepted, it tests if the flag
354 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 567 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
355 # please dont replace this function with test_flag in some future 568 # please dont replace this function with test_flag in some future
356 # clean-up! 569 # clean-up!
357 temp=`mktemp` 570
571 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
572
573 local temp=$(emktemp)
358 echo "int main() { return(0); }" > ${temp}.c 574 echo "int main() { return(0); }" > "${temp}".c
359 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 575 MY_CC=$(tc-getCC)
360 ret=$? 576 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
577 local ret=$?
361 rm -f ${temp}.c 578 rm -f "${temp}".c
362 [ "$ret" != "1" ] && return 0 579 [[ ${ret} != 1 ]] && return 0
363 return 1 580 return 1
364} 581}
365 582
583# @FUNCTION: replace-sparc64-flags
584# @DESCRIPTION:
585# Sets mcpu to v8 and uses the original value as mtune if none specified.
366replace-sparc64-flags() { 586replace-sparc64-flags() {
367 local SPARC64_CPUS="ultrasparc v9" 587 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
368 588
369 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 589 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
370 for x in ${SPARC64_CPUS}; do 590 for x in ${SPARC64_CPUS}; do
371 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 591 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
372 done 592 done
373 else 593 else
374 for x in ${SPARC64_CPUS}; do 594 for x in ${SPARC64_CPUS}; do
375 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 595 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
376 done 596 done
377 fi 597 fi
378 598
379 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 599 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
380 for x in ${SPARC64_CPUS}; do 600 for x in ${SPARC64_CPUS}; do
381 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 601 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
382 done 602 done
383 else 603 else
384 for x in ${SPARC64_CPUS}; do 604 for x in ${SPARC64_CPUS}; do
385 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 605 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
386 done 606 done
387 fi 607 fi
388 608
389 export CFLAGS CXXFLAGS 609 export CFLAGS CXXFLAGS
390} 610}
391 611
612# @FUNCTION: append-libs
613# @USAGE: <libs>
614# @DESCRIPTION:
615# Add extra <libs> to the current LIBS.
616append-libs() {
617 [[ $# -eq 0 ]] && return 0
618 local flag
619 for flag in "$@"; do
620 [[ ${flag} == -l* ]] && flag=${flag#-l}
621 export LIBS="${LIBS} -l${flag}"
622 done
623
624 return 0
625}
626
627# @FUNCTION: append-ldflags
628# @USAGE: <flags>
629# @DESCRIPTION:
630# Add extra <flags> to the current LDFLAGS.
392append-ldflags() { 631append-ldflags() {
632 [[ $# -eq 0 ]] && return 0
633 local flag
634 for flag in "$@"; do
635 [[ ${flag} == -l* ]] && \
636 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
637 done
638
393 export LDFLAGS="${LDFLAGS} $*" 639 export LDFLAGS="${LDFLAGS} $*"
394 return 0 640 return 0
395} 641}
396 642
643# @FUNCTION: filter-ldflags
644# @USAGE: <flags>
645# @DESCRIPTION:
646# Remove particular <flags> from LDFLAGS. Accepts shell globs.
397filter-ldflags() { 647filter-ldflags() {
398 local x 648 _filter-var LDFLAGS "$@"
649 return 0
650}
399 651
400 # we do this fancy spacing stuff so as to not filter 652# @FUNCTION: raw-ldflags
401 # out part of a flag ... we want flag atoms ! :D 653# @USAGE: [flags]
402 LDFLAGS=" ${LDFLAGS} " 654# @DESCRIPTION:
655# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
656# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
657# to gcc where it needs the '-Wl,'.
658#
659# If no flags are specified, then default to ${LDFLAGS}.
660raw-ldflags() {
661 local x input="$@"
662 [[ -z ${input} ]] && input=${LDFLAGS}
663 set --
403 for x in "$@" ; do 664 for x in ${input} ; do
404 LDFLAGS="${LDFLAGS// ${x} / }" 665 x=${x#-Wl,}
666 set -- "$@" ${x//,/ }
405 done 667 done
406 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 668 echo "$@"
407 export LDFLAGS
408 return 0
409} 669}
410 670
411etexec-flags() { 671# @FUNCTION: no-as-needed
412 # if you're not using a hardened compiler you wont need this 672# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
413 # PIC/no-pic kludge in the first place. 673no-as-needed() {
414 has_hardened || return 0 674 case $($(tc-getLD) -v 2>&1 </dev/null) in
675 *GNU*) # GNU ld
676 echo "-Wl,--no-as-needed" ;;
677 esac
678}
415 679
416 if has_pie || has_pic; then
417 [ -z "`is-flag -fno-pic`" ] &&
418 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
419 [ -z "`is-flag -nopie`" ] &&
420 export CFLAGS="${CFLAGS} `test_flag -nopie`"
421 fi 680fi
422 return 0
423}
424
425fstack-flags() {
426 if has_ssp; then
427 [ -z "`is-flag -fno-stack-protector`" ] &&
428 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
429 fi
430 return 0
431}

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