/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.11 Revision 1.53
1# Copyright 1999-2002 Gentoo Technologies, Inc. 1# Copyright 1999-2003 Gentoo Technologies, Inc.
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 1.53 2004/06/01 04:28:38 solar Exp $
4#
3# Author Bart Verwilst <verwilst@gentoo.org> 5# Author Bart Verwilst <verwilst@gentoo.org>
4# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.11 2002/12/22 12:11:56 cretin Exp $
5 6
6ECLASS=flag-o-matic 7ECLASS=flag-o-matic
7INHERITED="$INHERITED $ECLASS" 8INHERITED="$INHERITED $ECLASS"
8 9
9# 10#
10#### filter-flags <flag> #### 11#### filter-flags <flags> ####
11# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
12# 14#
13#### append-flags <flag> #### 15#### append-flags <flags> ####
14# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
15# 17#
16#### replace-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
17# Replace a flag by another one 19# Replace a flag by another one
18# 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#
19#### is-flag <flag> #### 25#### is-flag <flag> ####
20# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
21# Matches only complete flag 27# Matches only complete a flag
22# 28#
23#### strip-flags #### 29#### strip-flags ####
24# Strip C[XX]FLAGS of everything except known 30# Strip C[XX]FLAGS of everything except known
25# good options. 31# good options.
26# 32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
27#### get-flag <flag> #### 37#### get-flag <flag> ####
28# Find and echo the value for a particular flag 38# Find and echo the value for a particular flag
29# 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#
30 68
69# C[XX]FLAGS that we allow in strip-flags
70setup-allowed-flags() {
71 if [ -z "${ALLOWED_FLAGS}" ] ; then
72 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g"
73 case "${ARCH}" in
74 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
75 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
76 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
77 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
78 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
79 esac
80 fi
81
82 # C[XX]FLAGS that we are think is ok, but needs testing
83 # NOTE: currently -Os have issues with gcc3 and K6* arch's
84 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
85 return 0
86}
87
31filter-flags () { 88filter-flags() {
32 89 for x in "$@" ; do
33 for x in $1 90 case "${x}" in
91 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
92 -fstack-protector|-fstack-protector-all) fstack-flags;;
93 *) ;;
94 esac
34 do 95 done
96
97 # we do this fancy spacing stuff so as to not filter
98 # out part of a flag ... we want flag atoms ! :D
99 CFLAGS=" ${CFLAGS} "
100 CXXFLAGS=" ${CXXFLAGS} "
101 for x in "$@" ; do
35 export CFLAGS="${CFLAGS/${x}}" 102 CFLAGS="${CFLAGS// ${x} / }"
36 export CXXFLAGS="${CXXFLAGS/${x}}" 103 CXXFLAGS="${CXXFLAGS// ${x} / }"
37 done 104 done
38 105 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
106 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
107 return 0
39} 108}
40 109
110filter-lfs-flags() {
111 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
112}
113
114append-lfs-flags() {
115 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
116}
117
41append-flags () { 118append-flags() {
42
43 CFLAGS="${CFLAGS} $1" 119 export CFLAGS="${CFLAGS} $@"
44 CXXFLAGS="${CXXFLAGS} $1" 120 export CXXFLAGS="${CXXFLAGS} $@"
45 121 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
122 return 0
46} 123}
47 124
48replace-flags () { 125replace-flags() {
49 126 # we do this fancy spacing stuff so as to not filter
127 # out part of a flag ... we want flag atoms ! :D
128 CFLAGS=" ${CFLAGS} "
129 CXXFLAGS=" ${CXXFLAGS} "
50 CFLAGS="${CFLAGS/${1}/${2} }" 130 CFLAGS="${CFLAGS// ${1} / ${2} }"
51 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 131 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
132 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
133 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
134 return 0
135}
52 136
137replace-cpu-flags() {
138 local newcpu="$1" ; shift
139 local oldcpu=""
140 for oldcpu in "$@" ; do
141 replace-flags -march=${oldcpu} -march=${newcpu}
142 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
143 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
144 done
145 return 0
53} 146}
54 147
55is-flag() { 148is-flag() {
56
57 for x in ${CFLAGS} ${CXXFLAGS} 149 for x in ${CFLAGS} ${CXXFLAGS} ; do
58 do
59 if [ "${x}" = "$1" ] 150 if [ "${x}" == "$1" ] ; then
60 then
61 echo true 151 echo true
62 break 152 return 0
63 fi 153 fi
64 done 154 done
155 return 1
156}
65 157
158filter-mfpmath() {
159 # save the original -mfpmath flag
160 local orig_mfpmath="`get-flag -mfpmath`"
161 # get the value of the current -mfpmath flag
162 local new_math=" `get-flag mfpmath | tr , ' '` "
163 # figure out which math values are to be removed
164 local prune_math=""
165 for prune_math in "$@" ; do
166 new_math="${new_math/ ${prune_math} / }"
167 done
168 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
169
170 if [ -z "${new_math}" ] ; then
171 # if we're removing all user specified math values are
172 # slated for removal, then we just filter the flag
173 filter-flags ${orig_mfpmath}
174 else
175 # if we only want to filter some of the user specified
176 # math values, then we replace the current flag
177 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
178 fi
179 return 0
66} 180}
67 181
68strip-flags() { 182strip-flags() {
183 setup-allowed-flags
69 184
70 local NEW_CFLAGS="" 185 local NEW_CFLAGS=""
71 local NEW_CXXFLAGS="" 186 local NEW_CXXFLAGS=""
72 187
73 local ALLOWED_FLAGS="-O -mcpu -march -pipe -g" 188 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
189 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
190 use debug && einfo "Enabling the use of some unstable flags"
191 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
192 fi
74 193
75 set -f 194 set -f
76 195
77 for x in ${CFLAGS} 196 for x in ${CFLAGS}
78 do 197 do
79 for y in ${ALLOWED_FLAGS} 198 for y in ${ALLOWED_FLAGS}
80 do 199 do
200 flag=${x%%=*}
81 if [ "${x/${y}}" != "${x}" ] 201 if [ "${flag%%${y}}" = "" ]
82 then 202 then
83 if [ -z "${NEW_CFLAGS}" ]
84 then
85 NEW_CFLAGS="${x}"
86 else
87 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 203 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
88 fi 204 break
89 fi 205 fi
90 done 206 done
91 done 207 done
92 208
93 for x in ${CXXFLAGS} 209 for x in ${CXXFLAGS}
94 do 210 do
95 for y in ${ALLOWED_FLAGS} 211 for y in ${ALLOWED_FLAGS}
96 do 212 do
213 flag=${x%%=*}
97 if [ "${x/${y}}" != "${x}" ] 214 if [ "${flag%%${y}}" = "" ]
98 then 215 then
99 if [ -z "${NEW_CXXFLAGS}" ]
100 then
101 NEW_CXXFLAGS="${x}"
102 else
103 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 216 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
104 fi 217 break
105 fi 218 fi
106 done 219 done
107 done 220 done
108 221
222 # In case we filtered out all optimization flags fallback to -O2
223 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
224 NEW_CFLAGS="${NEW_CFLAGS} -O2"
225 fi
226 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
227 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
228 fi
229
109 set +f 230 set +f
231
232 use debug \
233 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
234 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
110 235
111 export CFLAGS="${NEW_CFLAGS}" 236 export CFLAGS="${NEW_CFLAGS}"
112 export CXXFLAGS="${NEW_CXXFLAGS}" 237 export CXXFLAGS="${NEW_CXXFLAGS}"
238 return 0
239}
240
241test_flag() {
242 if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then
243 echo "$@"
244 return 0
245 fi
246 return 1
247}
248
249strip-unsupported-flags() {
250 for x in ${CFLAGS} ; do
251 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
252 done
253 for x in ${CXXFLAGS} ; do
254 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
255 done
256
257 export CFLAGS="${NEW_CFLAGS}"
258 export CXXFLAGS="${NEW_CXXFLAGS}"
113} 259}
114 260
115get-flag() { 261get-flag() {
262 # this code looks a little flaky but seems to work for
263 # everything we want ...
264 # for example, if CFLAGS="-march=i686":
265 # `get-flags -march` == "-march=i686"
266 # `get-flags march` == "i686"
116 local findflag="$1" 267 local findflag="$1"
117
118 for f in ${CFLAGS} ${CXXFLAGS} ; do 268 for f in ${CFLAGS} ${CXXFLAGS} ; do
119 if [ "${f/${findflag}}" != "${f}" ] ; then 269 if [ "${f/${findflag}}" != "${f}" ] ; then
120 echo "${f/-${findflag}=}" 270 echo "${f/-${findflag}=}"
121 return 271 return 0
122 fi 272 fi
123 done 273 done
274 return 1
124} 275}
276
277has_hardened() {
278 local cc=${CC:-gcc}
279 [[ $(${cc%% *} --version 2>&1) == *Hardened* ]]
280 return $?
281}
282
283has_pic() {
284 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
285 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
286 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
287 return 1
288}
289
290has_pie() {
291 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
292 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
293 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
294 return 1
295}
296
297has_ssp() {
298 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
299 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
300 return 1
301}
302
303replace-sparc64-flags() {
304 local SPARC64_CPUS="ultrasparc v9"
305
306 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
307 then
308 for x in ${SPARC64_CPUS}
309 do
310 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
311 done
312 else
313 for x in ${SPARC64_CPUS}
314 do
315 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
316 done
317 fi
318
319 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
320 then
321 for x in ${SPARC64_CPUS}
322 do
323 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
324 done
325 else
326 for x in ${SPARC64_CPUS}
327 do
328 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
329 done
330 fi
331}
332
333append-ldflags() {
334 LDFLAGS="${LDFLAGS} $@"
335 return 0
336}
337
338filter-ldflags() {
339 # we do this fancy spacing stuff so as to not filter
340 # out part of a flag ... we want flag atoms ! :D
341 LDFLAGS=" ${LDFLAGS} "
342 for x in "$@" ; do
343 LDFLAGS="${LDFLAGS// ${x} / }"
344 done
345 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
346 return 0
347}
348
349etexec-flags() {
350 # if your not using a hardened compiler you wont need this
351 # PIC/no-pic kludge in the first place.
352 has_hardened || return
353
354 has_pie || has_pic
355 if [ $? == 0 ] ; then
356 [ -z "`is-flag -fno-pic`" ] &&
357 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
358
359 [ -z "`is-flag -nopie`" ] &&
360 export CFLAGS="${CFLAGS} `test_flag -nopie`"
361 fi
362}
363
364fstack-flags() {
365 has_ssp
366 if [ $? == 0 ] ; then
367 [ -z "`is-flag -fno-stack-protector`" ] &&
368 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
369 fi
370}
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