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Revision 1.50 Revision 1.161
1# Copyright 1999-2003 Gentoo Technologies, Inc. 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 1.50 2004/05/12 13:36:17 pappy Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.161 2011/12/15 05:23:15 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
10#
11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <new.cpu> <old.cpus> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28#
29#### strip-flags ####
30# Strip C[XX]FLAGS of everything except known
31# good options.
32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
37#### get-flag <flag> ####
38# Find and echo the value for a particular flag
39#
40#### replace-sparc64-flags ####
41# Sets mcpu to v8 and uses the original value
42# as mtune if none specified.
43#
44#### filter-mfpmath <math types> ####
45# Remove specified math types from the fpmath specification
46# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
47# will leave the user with -mfpmath=386
48#
49#### append-ldflags ####
50# Add extra flags to your current LDFLAGS
51#
52#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS
54# Matches only complete flags
55#
56#### etexec-flags ####
57# hooked function for hardened gcc that appends
58# -fno-pic to {C,CXX,LD}FLAGS
59# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
60#
61#### fstack-flags ####
62# hooked function for hardened gcc that appends
63# -fno-stack-protector to {C,CXX,LD}FLAGS
64# when a package is filtering -fstack-protector, -fstack-protector-all
65# notice: modern automatic specs files will also suppress -fstack-protector-all
66# when only -fno-stack-protector is given
67#
68
69# 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
70setup-allowed-flags() { 34setup-allowed-flags() {
71 if [ -z "${ALLOWED_FLAGS}" ] ; then 35 if [[ -z ${ALLOWED_FLAGS} ]] ; then
72 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 36 export ALLOWED_FLAGS="-pipe"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -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 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
68 # NOTE: currently -Os have issues with gcc3 and K6* arch's
69 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
70 return 0
71}
72
73# inverted filters for hardened compiler. This is trying to unpick
74# the hardened compiler defaults.
75_filter-hardened() {
76 local f
77 for f in "$@" ; do
73 case "${ARCH}" in 78 case "${f}" in
74 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 79 # Ideally we should only concern ourselves with PIE flags,
75 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 80 # not -fPIC or -fpic, but too many places filter -fPIC without
76 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 81 # thinking about -fPIE.
77 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 82 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
83 gcc-specs-pie || continue
84 is-flagq -nopie || append-flags -nopie;;
85 -fstack-protector)
86 gcc-specs-ssp || continue
87 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
88 -fstack-protector-all)
89 gcc-specs-ssp-to-all || continue
90 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
91 -fno-strict-overflow)
92 gcc-specs-nostrict || continue
93 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
78 esac 94 esac
79 fi 95 done
80
81 # C[XX]FLAGS that we are think is ok, but needs testing
82 # NOTE: currently -Os have issues with gcc3 and K6* arch's
83 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
84 return 0
85} 96}
86 97
98# Remove occurrences of strings from variable given in $1
99# Strings removed are matched as globs, so for example
100# '-O*' would remove -O1, -O2 etc.
101_filter-var() {
102 local f x VAR VAL
103 declare -a new
104
105 VAR=$1
106 shift
107 eval VAL=\${${VAR}}
108 for f in ${VAL}; do
109 for x in "$@"; do
110 # Note this should work with globs like -O*
111 [[ ${f} == ${x} ]] && continue 2
112 done
113 eval new\[\${\#new\[@]}]=\${f}
114 done
115 eval export ${VAR}=\${new\[*]}
116}
117
118# @FUNCTION: filter-flags
119# @USAGE: <flags>
120# @DESCRIPTION:
121# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
87filter-flags() { 122filter-flags() {
88 for x in "$@" ; do 123 _filter-hardened "$@"
89 case "${x}" in 124 _filter-var CFLAGS "$@"
90 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 125 _filter-var CPPFLAGS "$@"
91 -fstack-protector|-fstack-protector-all) fstack-flags;; 126 _filter-var CXXFLAGS "$@"
92 *) ;; 127 _filter-var FFLAGS "$@"
93 esac 128 _filter-var FCFLAGS "$@"
94 done
95
96 # we do this fancy spacing stuff so as to not filter
97 # out part of a flag ... we want flag atoms ! :D
98 CFLAGS=" ${CFLAGS} "
99 CXXFLAGS=" ${CXXFLAGS} "
100 for x in "$@" ; do
101 CFLAGS="${CFLAGS// ${x} / }"
102 CXXFLAGS="${CXXFLAGS// ${x} / }"
103 done
104 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
105 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
106 return 0 129 return 0
107} 130}
108 131
132# @FUNCTION: filter-lfs-flags
133# @DESCRIPTION:
134# Remove flags that enable Large File Support.
109filter-lfs-flags() { 135filter-lfs-flags() {
136 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
137 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
138 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
139 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
140 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
110 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 141 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
111} 142}
112 143
144# @FUNCTION: append-cppflags
145# @USAGE: <flags>
146# @DESCRIPTION:
147# Add extra <flags> to the current CPPFLAGS.
148append-cppflags() {
149 [[ $# -eq 0 ]] && return 0
150 export CPPFLAGS="${CPPFLAGS} $*"
151 return 0
152}
153
154# @FUNCTION: append-cflags
155# @USAGE: <flags>
156# @DESCRIPTION:
157# Add extra <flags> to the current CFLAGS.
158append-cflags() {
159 [[ $# -eq 0 ]] && return 0
160 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
161 return 0
162}
163
164# @FUNCTION: append-cxxflags
165# @USAGE: <flags>
166# @DESCRIPTION:
167# Add extra <flags> to the current CXXFLAGS.
168append-cxxflags() {
169 [[ $# -eq 0 ]] && return 0
170 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
171 return 0
172}
173
174# @FUNCTION: append-fflags
175# @USAGE: <flags>
176# @DESCRIPTION:
177# Add extra <flags> to the current {F,FC}FLAGS.
178append-fflags() {
179 [[ $# -eq 0 ]] && return 0
180 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
181 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
182 return 0
183}
184
185# @FUNCTION: append-lfs-flags
186# @DESCRIPTION:
187# Add flags that enable Large File Support.
113append-lfs-flags() { 188append-lfs-flags() {
189 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
190 # see comments in filter-lfs-flags func for meaning of these
114 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 191 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
115} 192}
116 193
194# @FUNCTION: append-flags
195# @USAGE: <flags>
196# @DESCRIPTION:
197# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
117append-flags() { 198append-flags() {
118 export CFLAGS="${CFLAGS} $@" 199 [[ $# -eq 0 ]] && return 0
119 export CXXFLAGS="${CXXFLAGS} $@" 200 append-cflags "$@"
120 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 201 append-cxxflags "$@"
202 append-fflags "$@"
121 return 0 203 return 0
122} 204}
123 205
206# @FUNCTION: replace-flags
207# @USAGE: <old> <new>
208# @DESCRIPTION:
209# Replace the <old> flag with <new>. Accepts shell globs for <old>.
124replace-flags() { 210replace-flags() {
125 # we do this fancy spacing stuff so as to not filter 211 [[ $# != 2 ]] \
126 # out part of a flag ... we want flag atoms ! :D 212 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
127 CFLAGS=" ${CFLAGS} " 213 && die "replace-flags takes 2 arguments, not $#"
128 CXXFLAGS=" ${CXXFLAGS} "
129 CFLAGS="${CFLAGS// ${1} / ${2} }"
130 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
131 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
132 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
133 return 0
134}
135 214
215 local f fset
216 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
217
218 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
219 # Looping over the flags instead of using a global
220 # substitution ensures that we're working with flag atoms.
221 # Otherwise globs like -O* have the potential to wipe out the
222 # list of flags.
223 for f in ${!fset}; do
224 # Note this should work with globs like -O*
225 [[ ${f} == ${1} ]] && f=${2}
226 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
227 done
228 eval export ${fset}=\${new_${fset}\[*]}
229 done
230
231 return 0
232}
233
234# @FUNCTION: replace-cpu-flags
235# @USAGE: <old> <new>
236# @DESCRIPTION:
237# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
238# with flags that select the <new> cpu. Accepts shell globs for <old>.
136replace-cpu-flags() { 239replace-cpu-flags() {
137 local newcpu="$1" ; shift 240 local newcpu="$#" ; newcpu="${!newcpu}"
138 local oldcpu="" 241 while [ $# -gt 1 ] ; do
139 for oldcpu in "$@" ; do 242 # quote to make sure that no globbing is done (particularly on
243 # ${oldcpu}) prior to calling replace-flags
140 replace-flags -march=${oldcpu} -march=${newcpu} 244 replace-flags "-march=${1}" "-march=${newcpu}"
141 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 245 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
142 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 246 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
247 shift
143 done 248 done
249 return 0
250}
251
252_is_flagq() {
253 local x
254 for x in ${!1} ; do
255 [[ ${x} == $2 ]] && return 0
256 done
144 return 0 257 return 1
145} 258}
146 259
260# @FUNCTION: is-flagq
261# @USAGE: <flag>
262# @DESCRIPTION:
263# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
264is-flagq() {
265 [[ -n $2 ]] && die "Usage: is-flag <flag>"
266 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
267}
268
269# @FUNCTION: is-flag
270# @USAGE: <flag>
271# @DESCRIPTION:
272# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
147is-flag() { 273is-flag() {
148 for x in ${CFLAGS} ${CXXFLAGS} ; do 274 is-flagq "$@" && echo true
149 if [ "${x}" == "$1" ] ; then
150 echo true
151 return 0
152 fi
153 done
154 return 1
155} 275}
156 276
277# @FUNCTION: is-ldflagq
278# @USAGE: <flag>
279# @DESCRIPTION:
280# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
281is-ldflagq() {
282 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
283 _is_flagq LDFLAGS $1
284}
285
286# @FUNCTION: is-ldflag
287# @USAGE: <flag>
288# @DESCRIPTION:
289# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
290is-ldflag() {
291 is-ldflagq "$@" && echo true
292}
293
294# @FUNCTION: filter-mfpmath
295# @USAGE: <math types>
296# @DESCRIPTION:
297# Remove specified math types from the fpmath flag. For example, if the user
298# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
299# -mfpmath=386.
157filter-mfpmath() { 300filter-mfpmath() {
301 local orig_mfpmath new_math prune_math
302
158 # save the original -mfpmath flag 303 # save the original -mfpmath flag
159 local orig_mfpmath="`get-flag -mfpmath`" 304 orig_mfpmath=$(get-flag -mfpmath)
160 # get the value of the current -mfpmath flag 305 # get the value of the current -mfpmath flag
161 local new_math=" `get-flag mfpmath | tr , ' '` " 306 new_math=$(get-flag mfpmath)
307 new_math=" ${new_math//,/ } "
162 # figure out which math values are to be removed 308 # figure out which math values are to be removed
163 local prune_math="" 309 prune_math=""
164 for prune_math in "$@" ; do 310 for prune_math in "$@" ; do
165 new_math="${new_math/ ${prune_math} / }" 311 new_math=${new_math/ ${prune_math} / }
166 done 312 done
167 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 313 new_math=$(echo ${new_math})
314 new_math=${new_math// /,}
168 315
169 if [ -z "${new_math}" ] ; then 316 if [[ -z ${new_math} ]] ; then
170 # if we're removing all user specified math values are 317 # if we're removing all user specified math values are
171 # slated for removal, then we just filter the flag 318 # slated for removal, then we just filter the flag
172 filter-flags ${orig_mfpmath} 319 filter-flags ${orig_mfpmath}
173 else 320 else
174 # if we only want to filter some of the user specified 321 # if we only want to filter some of the user specified
176 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 323 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
177 fi 324 fi
178 return 0 325 return 0
179} 326}
180 327
328# @FUNCTION: strip-flags
329# @DESCRIPTION:
330# Strip C[XX]FLAGS of everything except known good/safe flags.
181strip-flags() { 331strip-flags() {
332 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
333
182 setup-allowed-flags 334 setup-allowed-flags
183 335
184 local NEW_CFLAGS="" 336 local NEW_CFLAGS=""
185 local NEW_CXXFLAGS="" 337 local NEW_CXXFLAGS=""
338 local NEW_FFLAGS=""
339 local NEW_FCFLAGS=""
186 340
187 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 341 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
188 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 342 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
189 use debug && einfo "Enabling the use of some unstable flags"
190 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 343 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
191 fi 344 fi
192 345
193 set -f 346 set -f # disable pathname expansion
194 347
195 for x in ${CFLAGS} 348 for x in ${CFLAGS}; do
196 do
197 for y in ${ALLOWED_FLAGS} 349 for y in ${ALLOWED_FLAGS}; do
198 do
199 flag=${x%%=*} 350 flag=${x%%=*}
200 if [ "${flag%%${y}}" = "" ] 351 if [ "${flag%%${y}}" = "" ] ; then
201 then
202 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 352 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
203 break 353 break
204 fi 354 fi
205 done 355 done
206 done 356 done
207 357
208 for x in ${CXXFLAGS} 358 for x in ${CXXFLAGS}; do
209 do
210 for y in ${ALLOWED_FLAGS} 359 for y in ${ALLOWED_FLAGS}; do
211 do
212 flag=${x%%=*} 360 flag=${x%%=*}
213 if [ "${flag%%${y}}" = "" ] 361 if [ "${flag%%${y}}" = "" ] ; then
214 then
215 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 362 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
216 break 363 break
217 fi 364 fi
218 done 365 done
219 done 366 done
220 367
368 for x in ${FFLAGS}; do
369 for y in ${ALLOWED_FLAGS}; do
370 flag=${x%%=*}
371 if [ "${flag%%${y}}" = "" ] ; then
372 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
373 break
374 fi
375 done
376 done
377
378 for x in ${FCFLAGS}; do
379 for y in ${ALLOWED_FLAGS}; do
380 flag=${x%%=*}
381 if [ "${flag%%${y}}" = "" ] ; then
382 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
383 break
384 fi
385 done
386 done
387
221 # In case we filtered out all optimization flags fallback to -O2 388 # In case we filtered out all optimization flags fallback to -O2
222 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 389 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
223 NEW_CFLAGS="${NEW_CFLAGS} -O2" 390 NEW_CFLAGS="${NEW_CFLAGS} -O2"
224 fi 391 fi
225 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 392 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
226 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 393 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
227 fi 394 fi
395 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
396 NEW_FFLAGS="${NEW_FFLAGS} -O2"
397 fi
398 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
399 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
400 fi
228 401
229 set +f 402 set +f # re-enable pathname expansion
230
231 use debug \
232 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
233 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
234 403
235 export CFLAGS="${NEW_CFLAGS}" 404 export CFLAGS="${NEW_CFLAGS}"
236 export CXXFLAGS="${NEW_CXXFLAGS}" 405 export CXXFLAGS="${NEW_CXXFLAGS}"
406 export FFLAGS="${NEW_FFLAGS}"
407 export FCFLAGS="${NEW_FCFLAGS}"
237 return 0 408 return 0
238} 409}
239 410
240test_flag() { 411test-flag-PROG() {
241 if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then 412 local comp=$1
242 echo "$@" 413 local flags="$2"
414
415 [[ -z ${comp} || -z ${flags} ]] && return 1
416
417 # use -c so we can test the assembler as well
418 local PROG=$(tc-get${comp})
419 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
420 > /dev/null 2>&1
421}
422
423# @FUNCTION: test-flag-CC
424# @USAGE: <flag>
425# @DESCRIPTION:
426# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
427test-flag-CC() { test-flag-PROG "CC" "$1"; }
428
429# @FUNCTION: test-flag-CXX
430# @USAGE: <flag>
431# @DESCRIPTION:
432# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
433test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
434
435# @FUNCTION: test-flag-F77
436# @USAGE: <flag>
437# @DESCRIPTION:
438# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
439test-flag-F77() { test-flag-PROG "F77" "$1"; }
440
441# @FUNCTION: test-flag-FC
442# @USAGE: <flag>
443# @DESCRIPTION:
444# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
445test-flag-FC() { test-flag-PROG "FC" "$1"; }
446
447test-flags-PROG() {
448 local comp=$1
449 local flags
450 local x
451
452 shift
453
454 [[ -z ${comp} ]] && return 1
455
456 for x in "$@" ; do
457 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
458 done
459
460 echo "${flags}"
461
462 # Just bail if we dont have any flags
463 [[ -n ${flags} ]]
464}
465
466# @FUNCTION: test-flags-CC
467# @USAGE: <flags>
468# @DESCRIPTION:
469# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
470test-flags-CC() { test-flags-PROG "CC" "$@"; }
471
472# @FUNCTION: test-flags-CXX
473# @USAGE: <flags>
474# @DESCRIPTION:
475# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
476test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
477
478# @FUNCTION: test-flags-F77
479# @USAGE: <flags>
480# @DESCRIPTION:
481# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
482test-flags-F77() { test-flags-PROG "F77" "$@"; }
483
484# @FUNCTION: test-flags-FC
485# @USAGE: <flags>
486# @DESCRIPTION:
487# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
488test-flags-FC() { test-flags-PROG "FC" "$@"; }
489
490# @FUNCTION: test-flags
491# @USAGE: <flags>
492# @DESCRIPTION:
493# Short-hand that should hopefully work for both C and C++ compiler, but
494# its really only present due to the append-flags() abomination.
495test-flags() { test-flags-CC "$@"; }
496
497# @FUNCTION: test_version_info
498# @USAGE: <version>
499# @DESCRIPTION:
500# Returns shell true if the current C compiler version matches <version>, else returns shell false.
501# Accepts shell globs.
502test_version_info() {
503 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
243 return 0 504 return 0
244 fi 505 else
245 return 1 506 return 1
507 fi
246} 508}
247 509
510# @FUNCTION: strip-unsupported-flags
511# @DESCRIPTION:
512# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
248strip-unsupported-flags() { 513strip-unsupported-flags() {
249 for x in ${CFLAGS} ; do 514 export CFLAGS=$(test-flags-CC ${CFLAGS})
250 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 515 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
251 done 516 export FFLAGS=$(test-flags-F77 ${FFLAGS})
252 for x in ${CXXFLAGS} ; do 517 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
253 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
254 done
255
256 export CFLAGS="${NEW_CFLAGS}"
257 export CXXFLAGS="${NEW_CXXFLAGS}"
258} 518}
259 519
520# @FUNCTION: get-flag
521# @USAGE: <flag>
522# @DESCRIPTION:
523# Find and echo the value for a particular flag. Accepts shell globs.
260get-flag() { 524get-flag() {
525 local f findflag="$1"
526
261 # this code looks a little flaky but seems to work for 527 # this code looks a little flaky but seems to work for
262 # everything we want ... 528 # everything we want ...
263 # for example, if CFLAGS="-march=i686": 529 # for example, if CFLAGS="-march=i686":
264 # `get-flags -march` == "-march=i686" 530 # `get-flag -march` == "-march=i686"
265 # `get-flags march` == "i686" 531 # `get-flag march` == "i686"
266 local findflag="$1"
267 for f in ${CFLAGS} ${CXXFLAGS} ; do 532 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
268 if [ "${f/${findflag}}" != "${f}" ] ; then 533 if [ "${f/${findflag}}" != "${f}" ] ; then
269 echo "${f/-${findflag}=}" 534 printf "%s\n" "${f/-${findflag}=}"
270 return 0 535 return 0
271 fi 536 fi
272 done 537 done
273 return 1 538 return 1
274} 539}
275 540
276has_pic() { 541# DEAD FUNCS. Remove by Dec 2011.
277 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 542test_flag() { die "$0: deprecated, please use test-flags()!" ; }
278 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 543has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
279 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 544has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
545has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
546has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
547has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
548
549# @FUNCTION: has_m64
550# @DESCRIPTION:
551# This doesn't test if the flag is accepted, it tests if the flag actually
552# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
553# return code is 0, else the return code is 1.
554has_m64() {
555 # this doesnt test if the flag is accepted, it tests if the flag
556 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
557 # please dont replace this function with test_flag in some future
558 # clean-up!
559
560 local temp="$(emktemp)"
561 echo "int main() { return(0); }" > "${temp}".c
562 MY_CC=$(tc-getCC)
563 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
564 local ret=$?
565 rm -f "${temp}".c
566 [[ ${ret} != 1 ]] && return 0
280 return 1 567 return 1
281} 568}
282 569
283has_pie() { 570# @FUNCTION: has_m32
284 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 571# @DESCRIPTION:
285 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 572# This doesn't test if the flag is accepted, it tests if the flag actually
286 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 573# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
574# code is 0, else return code is 1.
575has_m32() {
576 # this doesnt test if the flag is accepted, it tests if the flag
577 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
578 # please dont replace this function with test_flag in some future
579 # clean-up!
580
581 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
582
583 local temp=$(emktemp)
584 echo "int main() { return(0); }" > "${temp}".c
585 MY_CC=$(tc-getCC)
586 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
587 local ret=$?
588 rm -f "${temp}".c
589 [[ ${ret} != 1 ]] && return 0
287 return 1 590 return 1
288} 591}
289
290has_ssp() {
291 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
292 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
293 return 1
294}
295 592
593# @FUNCTION: replace-sparc64-flags
594# @DESCRIPTION:
595# Sets mcpu to v8 and uses the original value as mtune if none specified.
296replace-sparc64-flags() { 596replace-sparc64-flags() {
297 local SPARC64_CPUS="ultrasparc v9" 597 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
298 598
299 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 599 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
300 then
301 for x in ${SPARC64_CPUS} 600 for x in ${SPARC64_CPUS}; do
302 do
303 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 601 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
304 done 602 done
305 else 603 else
306 for x in ${SPARC64_CPUS} 604 for x in ${SPARC64_CPUS}; do
307 do
308 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 605 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
309 done 606 done
310 fi 607 fi
311 608
312 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 609 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
313 then
314 for x in ${SPARC64_CPUS} 610 for x in ${SPARC64_CPUS}; do
315 do
316 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 611 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
317 done 612 done
318 else 613 else
319 for x in ${SPARC64_CPUS} 614 for x in ${SPARC64_CPUS}; do
320 do
321 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 615 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
322 done 616 done
323 fi 617 fi
324}
325 618
619 export CFLAGS CXXFLAGS
620}
621
622# @FUNCTION: append-libs
623# @USAGE: <libs>
624# @DESCRIPTION:
625# Add extra <libs> to the current LIBS.
626append-libs() {
627 [[ $# -eq 0 ]] && return 0
628 local flag
629 for flag in "$@"; do
630 [[ ${flag} == -l* ]] && flag=${flag#-l}
631 export LIBS="${LIBS} -l${flag}"
632 done
633
634 return 0
635}
636
637# @FUNCTION: append-ldflags
638# @USAGE: <flags>
639# @DESCRIPTION:
640# Add extra <flags> to the current LDFLAGS.
326append-ldflags() { 641append-ldflags() {
642 [[ $# -eq 0 ]] && return 0
643 local flag
644 for flag in "$@"; do
645 [[ ${flag} == -l* ]] && \
646 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
647 done
648
327 LDFLAGS="${LDFLAGS} $@" 649 export LDFLAGS="${LDFLAGS} $*"
328 return 0 650 return 0
329} 651}
330 652
653# @FUNCTION: filter-ldflags
654# @USAGE: <flags>
655# @DESCRIPTION:
656# Remove particular <flags> from LDFLAGS. Accepts shell globs.
331filter-ldflags() { 657filter-ldflags() {
332 # we do this fancy spacing stuff so as to not filter 658 _filter-var LDFLAGS "$@"
333 # out part of a flag ... we want flag atoms ! :D 659 return 0
334 LDFLAGS=" ${LDFLAGS} " 660}
661
662# @FUNCTION: raw-ldflags
663# @USAGE: [flags]
664# @DESCRIPTION:
665# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
666# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
667# to gcc where it needs the '-Wl,'.
668#
669# If no flags are specified, then default to ${LDFLAGS}.
670raw-ldflags() {
671 local x input="$@"
672 [[ -z ${input} ]] && input=${LDFLAGS}
673 set --
335 for x in "$@" ; do 674 for x in ${input} ; do
336 LDFLAGS="${LDFLAGS// ${x} / }" 675 x=${x#-Wl,}
676 set -- "$@" ${x//,/ }
337 done 677 done
338 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 678 echo "$@"
339 return 0
340} 679}
341 680
342etexec-flags() { 681# @FUNCTION: no-as-needed
343 has_pie || has_pic 682# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
344 if [ $? == 0 ] ; then 683no-as-needed() {
345 [ -z "`is-flag -fno-pic`" ] && 684 case $($(tc-getLD) -v 2>&1 </dev/null) in
346 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 685 *GNU*) # GNU ld
686 echo "-Wl,--no-as-needed" ;;
687 esac
688}
347 689
348 [ -z "`is-flag -nopie`" ] &&
349 export CFLAGS="${CFLAGS} `test_flag -nopie`"
350 fi 690fi
351}
352
353fstack-flags() {
354 has_ssp
355 if [ $? == 0 ] ; then
356 [ -z "`is-flag -fno-stack-protector`" ] &&
357 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
358 fi
359}

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