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Revision 1.62 Revision 1.162
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 1.62 2004/07/15 04:59:44 lv Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.162 2011/12/28 05:48:28 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 $ECLASS"
9IUSE="$IUSE debug"
10 31
11#
12#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags
15#
16#### append-flags <flags> ####
17# Add extra flags to your current C[XX]FLAGS
18#
19#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one
21#
22#### replace-cpu-flags <new.cpu> <old.cpus> ###
23# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu>
25#
26#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS
28# Matches only complete a flag
29#
30#### strip-flags ####
31# Strip C[XX]FLAGS of everything except known
32# good options.
33#
34#### strip-unsupported-flags ####
35# Strip C[XX]FLAGS of any flags not supported by
36# installed version of gcc
37#
38#### get-flag <flag> ####
39# Find and echo the value for a particular flag
40#
41#### replace-sparc64-flags ####
42# Sets mcpu to v8 and uses the original value
43# as mtune if none specified.
44#
45#### filter-mfpmath <math types> ####
46# Remove specified math types from the fpmath specification
47# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
48# will leave the user with -mfpmath=386
49#
50#### append-ldflags ####
51# Add extra flags to your current LDFLAGS
52#
53#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS
55# Matches only complete flags
56#
57#### etexec-flags ####
58# hooked function for hardened gcc that appends
59# -fno-pic to {C,CXX,LD}FLAGS
60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
61#
62#### fstack-flags ####
63# hooked function for hardened gcc that appends
64# -fno-stack-protector to {C,CXX,LD}FLAGS
65# when a package is filtering -fstack-protector, -fstack-protector-all
66# notice: modern automatic specs files will also suppress -fstack-protector-all
67# when only -fno-stack-protector is given
68#
69
70# 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
71setup-allowed-flags() { 34setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 35 if [[ -z ${ALLOWED_FLAGS} ]] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 36 export ALLOWED_FLAGS="-pipe"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O1 -O2 -Os -mcpu -march -mtune"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
41 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
42 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
43 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
44 fi
45 # allow a bunch of flags that negate features / control ABI
46 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
47 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
48 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
49 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
50 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
51 -mno-popcnt -mno-abm \
52 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
53 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
54 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
55 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
56 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
57 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
58 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
59 -msecure-plt -m*-toc -D* -U*"
60
61 # 4.5
62 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
63 # 4.6
64 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
65 -mno-bmi -mno-tbm"
66
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 "$@" ; do
74 case "${ARCH}" in 75 case "${f}" in
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 76 # Ideally we should only concern ourselves with PIE flags,
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 77 # not -fPIC or -fpic, but too many places filter -fPIC without
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 78 # thinking about -fPIE.
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 80 gcc-specs-pie || continue
81 is-flagq -nopie || append-flags -nopie;;
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);;
80 esac 91 esac
81 fi 92 done
82
83 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0
87} 93}
88 94
95# Remove occurrences of strings from variable given in $1
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 VAL
100 declare -a new
101
102 VAR=$1
103 shift
104 eval VAL=\${${VAR}}
105 for f in ${VAL}; do
106 for x in "$@"; do
107 # Note this should work with globs like -O*
108 [[ ${f} == ${x} ]] && continue 2
109 done
110 eval new\[\${\#new\[@]}]=\${f}
111 done
112 eval export ${VAR}=\${new\[*]}
113}
114
115# @FUNCTION: filter-flags
116# @USAGE: <flags>
117# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
89filter-flags() { 119filter-flags() {
120 _filter-hardened "$@"
121 _filter-var CFLAGS "$@"
122 _filter-var CPPFLAGS "$@"
123 _filter-var CXXFLAGS "$@"
124 _filter-var FFLAGS "$@"
125 _filter-var FCFLAGS "$@"
126 return 0
127}
128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
132filter-lfs-flags() {
133 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
134 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
135 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
136 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
137 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
138 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
139}
140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
145append-cppflags() {
146 [[ $# -eq 0 ]] && return 0
147 export CPPFLAGS="${CPPFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS.
155append-cflags() {
156 [[ $# -eq 0 ]] && return 0
157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
158 return 0
159}
160
161# @FUNCTION: append-cxxflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current CXXFLAGS.
165append-cxxflags() {
166 [[ $# -eq 0 ]] && return 0
167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
168 return 0
169}
170
171# @FUNCTION: append-fflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current {F,FC}FLAGS.
175append-fflags() {
176 [[ $# -eq 0 ]] && return 0
177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
179 return 0
180}
181
182# @FUNCTION: append-lfs-flags
183# @DESCRIPTION:
184# Add flags that enable Large File Support.
185append-lfs-flags() {
186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189}
190
191# @FUNCTION: append-flags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
195append-flags() {
196 [[ $# -eq 0 ]] && return 0
197 append-cflags "$@"
198 append-cxxflags "$@"
199 append-fflags "$@"
200 return 0
201}
202
203# @FUNCTION: replace-flags
204# @USAGE: <old> <new>
205# @DESCRIPTION:
206# Replace the <old> flag with <new>. Accepts shell globs for <old>.
207replace-flags() {
208 [[ $# != 2 ]] \
209 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
210 && die "replace-flags takes 2 arguments, not $#"
211
90 local x f fset 212 local f fset
91 declare -a new_CFLAGS new_CXXFLAGS 213 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
92 214
93 for x in "$@" ; do
94 case "${x}" in
95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
96 -fstack-protector|-fstack-protector-all) fstack-flags;;
97 esac
98 done
99
100 for fset in CFLAGS CXXFLAGS; do 215 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
216 # Looping over the flags instead of using a global
217 # substitution ensures that we're working with flag atoms.
218 # Otherwise globs like -O* have the potential to wipe out the
219 # list of flags.
101 for f in ${!fset}; do 220 for f in ${!fset}; do
102 for x in "$@"; do
103 # Note this should work with globs like -O* 221 # Note this should work with globs like -O*
104 [[ ${f} == ${x} ]] && continue 2 222 [[ ${f} == ${1} ]] && f=${2}
105 done
106 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 223 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
107 done 224 done
108 eval export ${fset}=\${new_${fset}\[*]} 225 eval export ${fset}=\${new_${fset}\[*]}
109 done 226 done
110 227
111 return 0 228 return 0
112} 229}
113 230
114filter-lfs-flags() { 231# @FUNCTION: replace-cpu-flags
115 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 232# @USAGE: <old> <new>
116} 233# @DESCRIPTION:
117 234# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
118append-lfs-flags() { 235# with flags that select the <new> cpu. Accepts shell globs for <old>.
119 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
120}
121
122append-flags() {
123 export CFLAGS="${CFLAGS} $*"
124 export CXXFLAGS="${CXXFLAGS} $*"
125 [ -n "`is-flag -fno-stack-protector`" -o \
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
127 return 0
128}
129
130replace-flags() {
131 # we do this fancy spacing stuff so as to not filter
132 # out part of a flag ... we want flag atoms ! :D
133 CFLAGS=" ${CFLAGS} "
134 CXXFLAGS=" ${CXXFLAGS} "
135 CFLAGS="${CFLAGS// ${1} / ${2} }"
136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
139 export CFLAGS CXXFLAGS
140 return 0
141}
142
143replace-cpu-flags() { 236replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift 237 local newcpu="$#" ; newcpu="${!newcpu}"
145 for oldcpu in "$@" ; do 238 while [ $# -gt 1 ] ; do
239 # quote to make sure that no globbing is done (particularly on
240 # ${oldcpu}) prior to calling replace-flags
146 replace-flags -march=${oldcpu} -march=${newcpu} 241 replace-flags "-march=${1}" "-march=${newcpu}"
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 242 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 243 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
244 shift
149 done 245 done
246 return 0
247}
248
249_is_flagq() {
250 local x
251 for x in ${!1} ; do
252 [[ ${x} == $2 ]] && return 0
253 done
150 return 0 254 return 1
151} 255}
152 256
257# @FUNCTION: is-flagq
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
261is-flagq() {
262 [[ -n $2 ]] && die "Usage: is-flag <flag>"
263 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
264}
265
266# @FUNCTION: is-flag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
153is-flag() { 270is-flag() {
154 local x 271 is-flagq "$@" && echo true
155
156 for x in ${CFLAGS} ${CXXFLAGS} ; do
157 if [ "${x}" == "$1" ] ; then
158 echo true
159 return 0
160 fi
161 done
162 return 1
163} 272}
164 273
274# @FUNCTION: is-ldflagq
275# @USAGE: <flag>
276# @DESCRIPTION:
277# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
278is-ldflagq() {
279 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
280 _is_flagq LDFLAGS $1
281}
282
283# @FUNCTION: is-ldflag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
287is-ldflag() {
288 is-ldflagq "$@" && echo true
289}
290
291# @FUNCTION: filter-mfpmath
292# @USAGE: <math types>
293# @DESCRIPTION:
294# Remove specified math types from the fpmath flag. For example, if the user
295# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
296# -mfpmath=386.
165filter-mfpmath() { 297filter-mfpmath() {
166 local orig_mfpmath new_math prune_math 298 local orig_mfpmath new_math prune_math
167 299
168 # save the original -mfpmath flag 300 # save the original -mfpmath flag
169 orig_mfpmath="`get-flag -mfpmath`" 301 orig_mfpmath=$(get-flag -mfpmath)
170 # get the value of the current -mfpmath flag 302 # get the value of the current -mfpmath flag
171 new_math=" `get-flag mfpmath | tr , ' '` " 303 new_math=$(get-flag mfpmath)
304 new_math=" ${new_math//,/ } "
172 # figure out which math values are to be removed 305 # figure out which math values are to be removed
173 prune_math="" 306 prune_math=""
174 for prune_math in "$@" ; do 307 for prune_math in "$@" ; do
175 new_math="${new_math/ ${prune_math} / }" 308 new_math=${new_math/ ${prune_math} / }
176 done 309 done
177 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 310 new_math=$(echo ${new_math})
311 new_math=${new_math// /,}
178 312
179 if [ -z "${new_math}" ] ; then 313 if [[ -z ${new_math} ]] ; then
180 # if we're removing all user specified math values are 314 # if we're removing all user specified math values are
181 # slated for removal, then we just filter the flag 315 # slated for removal, then we just filter the flag
182 filter-flags ${orig_mfpmath} 316 filter-flags ${orig_mfpmath}
183 else 317 else
184 # if we only want to filter some of the user specified 318 # if we only want to filter some of the user specified
186 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 320 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
187 fi 321 fi
188 return 0 322 return 0
189} 323}
190 324
325# @FUNCTION: strip-flags
326# @DESCRIPTION:
327# Strip C[XX]FLAGS of everything except known good/safe flags.
191strip-flags() { 328strip-flags() {
192 local x y flag NEW_CFLAGS NEW_CXXFLAGS 329 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
193 330
194 setup-allowed-flags 331 setup-allowed-flags
195 332
196 local NEW_CFLAGS="" 333 local NEW_CFLAGS=""
197 local NEW_CXXFLAGS="" 334 local NEW_CXXFLAGS=""
198 335 local NEW_FFLAGS=""
199 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 336 local NEW_FCFLAGS=""
200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
201 use debug && einfo "Enabling the use of some unstable flags"
202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
203 fi
204 337
205 set -f # disable pathname expansion 338 set -f # disable pathname expansion
206 339
207 for x in ${CFLAGS}; do 340 for x in ${CFLAGS}; do
208 for y in ${ALLOWED_FLAGS}; do 341 for y in ${ALLOWED_FLAGS}; do
209 flag=${x%%=*} 342 flag=${x%%=*}
210 if [ "${flag%%${y}}" = "" ]; then 343 if [ "${flag%%${y}}" = "" ] ; then
211 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 344 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
212 break 345 break
213 fi 346 fi
214 done 347 done
215 done 348 done
216 349
217 for x in ${CXXFLAGS}; do 350 for x in ${CXXFLAGS}; do
218 for y in ${ALLOWED_FLAGS}; do 351 for y in ${ALLOWED_FLAGS}; do
219 flag=${x%%=*} 352 flag=${x%%=*}
220 if [ "${flag%%${y}}" = "" ]; then 353 if [ "${flag%%${y}}" = "" ] ; then
221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 354 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222 break 355 break
223 fi 356 fi
224 done 357 done
225 done 358 done
226 359
360 for x in ${FFLAGS}; do
361 for y in ${ALLOWED_FLAGS}; do
362 flag=${x%%=*}
363 if [ "${flag%%${y}}" = "" ] ; then
364 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
365 break
366 fi
367 done
368 done
369
370 for x in ${FCFLAGS}; do
371 for y in ${ALLOWED_FLAGS}; do
372 flag=${x%%=*}
373 if [ "${flag%%${y}}" = "" ] ; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
375 break
376 fi
377 done
378 done
379
227 # In case we filtered out all optimization flags fallback to -O2 380 # In case we filtered out all optimization flags fallback to -O2
228 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 381 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
229 NEW_CFLAGS="${NEW_CFLAGS} -O2" 382 NEW_CFLAGS="${NEW_CFLAGS} -O2"
230 fi 383 fi
231 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 384 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
232 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 385 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
233 fi 386 fi
387 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
388 NEW_FFLAGS="${NEW_FFLAGS} -O2"
389 fi
390 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
391 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
392 fi
234 393
235 set +f # re-enable pathname expansion 394 set +f # re-enable pathname expansion
236 395
237 export CFLAGS="${NEW_CFLAGS}" 396 export CFLAGS="${NEW_CFLAGS}"
238 export CXXFLAGS="${NEW_CXXFLAGS}" 397 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0 398 export FFLAGS="${NEW_FFLAGS}"
240} 399 export FCFLAGS="${NEW_FCFLAGS}"
241
242test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *}
244 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
245 printf "%s\n" "$*"
246 return 0 400 return 0
247 fi
248 return 1
249} 401}
250 402
403test-flag-PROG() {
404 local comp=$1
405 local flags="$2"
406
407 [[ -z ${comp} || -z ${flags} ]] && return 1
408
409 # use -c so we can test the assembler as well
410 local PROG=$(tc-get${comp})
411 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
412 > /dev/null 2>&1
413}
414
415# @FUNCTION: test-flag-CC
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
419test-flag-CC() { test-flag-PROG "CC" "$1"; }
420
421# @FUNCTION: test-flag-CXX
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
425test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
426
427# @FUNCTION: test-flag-F77
428# @USAGE: <flag>
429# @DESCRIPTION:
430# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
431test-flag-F77() { test-flag-PROG "F77" "$1"; }
432
433# @FUNCTION: test-flag-FC
434# @USAGE: <flag>
435# @DESCRIPTION:
436# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
437test-flag-FC() { test-flag-PROG "FC" "$1"; }
438
439test-flags-PROG() {
440 local comp=$1
441 local flags
442 local x
443
444 shift
445
446 [[ -z ${comp} ]] && return 1
447
448 for x in "$@" ; do
449 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
450 done
451
452 echo "${flags}"
453
454 # Just bail if we dont have any flags
455 [[ -n ${flags} ]]
456}
457
458# @FUNCTION: test-flags-CC
459# @USAGE: <flags>
460# @DESCRIPTION:
461# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
462test-flags-CC() { test-flags-PROG "CC" "$@"; }
463
464# @FUNCTION: test-flags-CXX
465# @USAGE: <flags>
466# @DESCRIPTION:
467# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
468test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
469
470# @FUNCTION: test-flags-F77
471# @USAGE: <flags>
472# @DESCRIPTION:
473# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
474test-flags-F77() { test-flags-PROG "F77" "$@"; }
475
476# @FUNCTION: test-flags-FC
477# @USAGE: <flags>
478# @DESCRIPTION:
479# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
480test-flags-FC() { test-flags-PROG "FC" "$@"; }
481
482# @FUNCTION: test-flags
483# @USAGE: <flags>
484# @DESCRIPTION:
485# Short-hand that should hopefully work for both C and C++ compiler, but
486# its really only present due to the append-flags() abomination.
487test-flags() { test-flags-CC "$@"; }
488
489# @FUNCTION: test_version_info
490# @USAGE: <version>
491# @DESCRIPTION:
492# Returns shell true if the current C compiler version matches <version>, else returns shell false.
493# Accepts shell globs.
251test_version_info() { 494test_version_info() {
252 local cc=${CC:-gcc} ; cc=${cc%% *}
253 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 495 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
254 return 0 496 return 0
255 else 497 else
256 return 1 498 return 1
257 fi 499 fi
258} 500}
259 501
502# @FUNCTION: strip-unsupported-flags
503# @DESCRIPTION:
504# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
260strip-unsupported-flags() { 505strip-unsupported-flags() {
261 local NEW_CFLAGS NEW_CXXFLAGS 506 export CFLAGS=$(test-flags-CC ${CFLAGS})
262 507 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
263 for x in ${CFLAGS} ; do 508 export FFLAGS=$(test-flags-F77 ${FFLAGS})
264 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 509 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
265 done
266 for x in ${CXXFLAGS} ; do
267 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
268 done
269
270 export CFLAGS="${NEW_CFLAGS}"
271 export CXXFLAGS="${NEW_CXXFLAGS}"
272} 510}
273 511
512# @FUNCTION: get-flag
513# @USAGE: <flag>
514# @DESCRIPTION:
515# Find and echo the value for a particular flag. Accepts shell globs.
274get-flag() { 516get-flag() {
275 local f findflag="$1" 517 local f findflag="$1"
276 518
277 # this code looks a little flaky but seems to work for 519 # this code looks a little flaky but seems to work for
278 # everything we want ... 520 # everything we want ...
279 # for example, if CFLAGS="-march=i686": 521 # for example, if CFLAGS="-march=i686":
280 # `get-flag -march` == "-march=i686" 522 # `get-flag -march` == "-march=i686"
281 # `get-flag march` == "i686" 523 # `get-flag march` == "i686"
282 for f in ${CFLAGS} ${CXXFLAGS} ; do 524 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
283 if [ "${f/${findflag}}" != "${f}" ] ; then 525 if [ "${f/${findflag}}" != "${f}" ] ; then
284 printf "%s\n" "${f/-${findflag}=}" 526 printf "%s\n" "${f/-${findflag}=}"
285 return 0 527 return 0
286 fi 528 fi
287 done 529 done
288 return 1 530 return 1
289} 531}
290 532
291has_hardened() { 533# DEAD FUNCS. Remove by Dec 2011.
292 test_version_info Hardened 534test_flag() { die "$0: deprecated, please use test-flags()!" ; }
293 return $? 535has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
294} 536has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
537has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
538has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
539has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
295 540
296has_pic() { 541# @FUNCTION: has_m64
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 542# @DESCRIPTION:
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 543# This doesn't test if the flag is accepted, it tests if the flag actually
299 test_version_info pie && return 0 544# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
300 return 1 545# return code is 0, else the return code is 1.
301}
302
303has_pie() {
304 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
305 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
306 test_version_info pie && return 0
307 return 1
308}
309
310has_ssp() {
311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
312 test_version_info ssp && return 0
313 return 1
314}
315
316has_m64() { 546has_m64() {
317 # this doesnt test if the flag is accepted, it tests if the flag 547 # this doesnt test if the flag is accepted, it tests if the flag
318 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 548 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
319 # please dont replace this function with test_flag in some future 549 # please dont replace this function with test_flag in some future
320 # clean-up! 550 # clean-up!
321 temp=`mktemp` 551
552 local temp="$(emktemp)"
322 echo "int main() { return(0); }" > ${temp}.c 553 echo "int main() { return(0); }" > "${temp}".c
323 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 554 MY_CC=$(tc-getCC)
324 ret=$? 555 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
556 local ret=$?
325 rm -f ${temp}.c 557 rm -f "${temp}".c
326 [ "$ret" != "1" ] && return 0 558 [[ ${ret} != 1 ]] && return 0
327 return 1 559 return 1
328} 560}
329 561
562# @FUNCTION: has_m32
563# @DESCRIPTION:
564# This doesn't test if the flag is accepted, it tests if the flag actually
565# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
566# code is 0, else return code is 1.
330has_m32() { 567has_m32() {
331 # this doesnt test if the flag is accepted, it tests if the flag 568 # this doesnt test if the flag is accepted, it tests if the flag
332 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 569 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
333 # please dont replace this function with test_flag in some future 570 # please dont replace this function with test_flag in some future
334 # clean-up! 571 # clean-up!
335 temp=`mktemp` 572
573 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
574
575 local temp=$(emktemp)
336 echo "int main() { return(0); }" > ${temp}.c 576 echo "int main() { return(0); }" > "${temp}".c
337 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 577 MY_CC=$(tc-getCC)
338 ret=$? 578 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
579 local ret=$?
339 rm -f ${temp}.c 580 rm -f "${temp}".c
340 [ "$ret" != "1" ] && return 0 581 [[ ${ret} != 1 ]] && return 0
341 return 1 582 return 1
342} 583}
343 584
585# @FUNCTION: replace-sparc64-flags
586# @DESCRIPTION:
587# Sets mcpu to v8 and uses the original value as mtune if none specified.
344replace-sparc64-flags() { 588replace-sparc64-flags() {
345 local SPARC64_CPUS="ultrasparc v9" 589 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
346 590
347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 591 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
348 for x in ${SPARC64_CPUS}; do 592 for x in ${SPARC64_CPUS}; do
349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 593 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
350 done 594 done
351 else 595 else
352 for x in ${SPARC64_CPUS}; do 596 for x in ${SPARC64_CPUS}; do
353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 597 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
354 done 598 done
355 fi 599 fi
356 600
357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 601 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
358 for x in ${SPARC64_CPUS}; do 602 for x in ${SPARC64_CPUS}; do
359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 603 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
360 done 604 done
361 else 605 else
362 for x in ${SPARC64_CPUS}; do 606 for x in ${SPARC64_CPUS}; do
363 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 607 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
364 done 608 done
365 fi 609 fi
366 610
367 export CFLAGS CXXFLAGS 611 export CFLAGS CXXFLAGS
368} 612}
369 613
614# @FUNCTION: append-libs
615# @USAGE: <libs>
616# @DESCRIPTION:
617# Add extra <libs> to the current LIBS.
618append-libs() {
619 [[ $# -eq 0 ]] && return 0
620 local flag
621 for flag in "$@"; do
622 [[ ${flag} == -l* ]] && flag=${flag#-l}
623 export LIBS="${LIBS} -l${flag}"
624 done
625
626 return 0
627}
628
629# @FUNCTION: append-ldflags
630# @USAGE: <flags>
631# @DESCRIPTION:
632# Add extra <flags> to the current LDFLAGS.
370append-ldflags() { 633append-ldflags() {
634 [[ $# -eq 0 ]] && return 0
635 local flag
636 for flag in "$@"; do
637 [[ ${flag} == -l* ]] && \
638 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
639 done
640
371 export LDFLAGS="${LDFLAGS} $*" 641 export LDFLAGS="${LDFLAGS} $*"
372 return 0 642 return 0
373} 643}
374 644
645# @FUNCTION: filter-ldflags
646# @USAGE: <flags>
647# @DESCRIPTION:
648# Remove particular <flags> from LDFLAGS. Accepts shell globs.
375filter-ldflags() { 649filter-ldflags() {
376 local x 650 _filter-var LDFLAGS "$@"
651 return 0
652}
377 653
378 # we do this fancy spacing stuff so as to not filter 654# @FUNCTION: raw-ldflags
379 # out part of a flag ... we want flag atoms ! :D 655# @USAGE: [flags]
380 LDFLAGS=" ${LDFLAGS} " 656# @DESCRIPTION:
657# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
658# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
659# to gcc where it needs the '-Wl,'.
660#
661# If no flags are specified, then default to ${LDFLAGS}.
662raw-ldflags() {
663 local x input="$@"
664 [[ -z ${input} ]] && input=${LDFLAGS}
665 set --
381 for x in "$@" ; do 666 for x in ${input} ; do
382 LDFLAGS="${LDFLAGS// ${x} / }" 667 x=${x#-Wl,}
668 set -- "$@" ${x//,/ }
383 done 669 done
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 670 echo "$@"
385 export LDFLAGS
386 return 0
387} 671}
388 672
389etexec-flags() { 673# @FUNCTION: no-as-needed
390 # if you're not using a hardened compiler you wont need this 674# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
391 # PIC/no-pic kludge in the first place. 675no-as-needed() {
392 has_hardened || return 0 676 case $($(tc-getLD) -v 2>&1 </dev/null) in
677 *GNU*) # GNU ld
678 echo "-Wl,--no-as-needed" ;;
679 esac
680}
393 681
394 if has_pie || has_pic; then
395 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] &&
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
399 fi 682fi
400 return 0
401}
402
403fstack-flags() {
404 if has_ssp; then
405 [ -z "`is-flag -fno-stack-protector`" ] &&
406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
407 fi
408 return 0
409}

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