/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.11 Revision 1.50
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 1.50 2004/05/12 13:36:17 pappy 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 -pipe -g"
73 case "${ARCH}" in
74 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
75 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
76 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
77 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
78 esac
79 fi
80
81 # C[XX]FLAGS that we are think is ok, but needs testing
82 # NOTE: currently -Os have issues with gcc3 and K6* arch's
83 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
84 return 0
85}
86
31filter-flags () { 87filter-flags() {
32 88 for x in "$@" ; do
33 for x in $1 89 case "${x}" in
90 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
91 -fstack-protector|-fstack-protector-all) fstack-flags;;
92 *) ;;
93 esac
34 do 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
35 export CFLAGS="${CFLAGS/${x}}" 101 CFLAGS="${CFLAGS// ${x} / }"
36 export CXXFLAGS="${CXXFLAGS/${x}}" 102 CXXFLAGS="${CXXFLAGS// ${x} / }"
37 done 103 done
38 104 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
105 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
106 return 0
39} 107}
40 108
109filter-lfs-flags() {
110 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
111}
112
113append-lfs-flags() {
114 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
115}
116
41append-flags () { 117append-flags() {
42
43 CFLAGS="${CFLAGS} $1" 118 export CFLAGS="${CFLAGS} $@"
44 CXXFLAGS="${CXXFLAGS} $1" 119 export CXXFLAGS="${CXXFLAGS} $@"
45 120 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
121 return 0
46} 122}
47 123
48replace-flags () { 124replace-flags() {
49 125 # we do this fancy spacing stuff so as to not filter
126 # out part of a flag ... we want flag atoms ! :D
127 CFLAGS=" ${CFLAGS} "
128 CXXFLAGS=" ${CXXFLAGS} "
50 CFLAGS="${CFLAGS/${1}/${2} }" 129 CFLAGS="${CFLAGS// ${1} / ${2} }"
51 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 130 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
131 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
132 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
133 return 0
134}
52 135
136replace-cpu-flags() {
137 local newcpu="$1" ; shift
138 local oldcpu=""
139 for oldcpu in "$@" ; do
140 replace-flags -march=${oldcpu} -march=${newcpu}
141 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
142 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
143 done
144 return 0
53} 145}
54 146
55is-flag() { 147is-flag() {
56
57 for x in ${CFLAGS} ${CXXFLAGS} 148 for x in ${CFLAGS} ${CXXFLAGS} ; do
58 do
59 if [ "${x}" = "$1" ] 149 if [ "${x}" == "$1" ] ; then
60 then
61 echo true 150 echo true
62 break 151 return 0
63 fi 152 fi
64 done 153 done
154 return 1
155}
65 156
157filter-mfpmath() {
158 # save the original -mfpmath flag
159 local orig_mfpmath="`get-flag -mfpmath`"
160 # get the value of the current -mfpmath flag
161 local new_math=" `get-flag mfpmath | tr , ' '` "
162 # figure out which math values are to be removed
163 local prune_math=""
164 for prune_math in "$@" ; do
165 new_math="${new_math/ ${prune_math} / }"
166 done
167 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
168
169 if [ -z "${new_math}" ] ; then
170 # if we're removing all user specified math values are
171 # slated for removal, then we just filter the flag
172 filter-flags ${orig_mfpmath}
173 else
174 # if we only want to filter some of the user specified
175 # math values, then we replace the current flag
176 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
177 fi
178 return 0
66} 179}
67 180
68strip-flags() { 181strip-flags() {
182 setup-allowed-flags
69 183
70 local NEW_CFLAGS="" 184 local NEW_CFLAGS=""
71 local NEW_CXXFLAGS="" 185 local NEW_CXXFLAGS=""
72 186
73 local ALLOWED_FLAGS="-O -mcpu -march -pipe -g" 187 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
188 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
189 use debug && einfo "Enabling the use of some unstable flags"
190 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
191 fi
74 192
75 set -f 193 set -f
76 194
77 for x in ${CFLAGS} 195 for x in ${CFLAGS}
78 do 196 do
79 for y in ${ALLOWED_FLAGS} 197 for y in ${ALLOWED_FLAGS}
80 do 198 do
199 flag=${x%%=*}
81 if [ "${x/${y}}" != "${x}" ] 200 if [ "${flag%%${y}}" = "" ]
82 then 201 then
83 if [ -z "${NEW_CFLAGS}" ]
84 then
85 NEW_CFLAGS="${x}"
86 else
87 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 202 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
88 fi 203 break
89 fi 204 fi
90 done 205 done
91 done 206 done
92 207
93 for x in ${CXXFLAGS} 208 for x in ${CXXFLAGS}
94 do 209 do
95 for y in ${ALLOWED_FLAGS} 210 for y in ${ALLOWED_FLAGS}
96 do 211 do
212 flag=${x%%=*}
97 if [ "${x/${y}}" != "${x}" ] 213 if [ "${flag%%${y}}" = "" ]
98 then 214 then
99 if [ -z "${NEW_CXXFLAGS}" ]
100 then
101 NEW_CXXFLAGS="${x}"
102 else
103 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 215 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
104 fi 216 break
105 fi 217 fi
106 done 218 done
107 done 219 done
108 220
221 # In case we filtered out all optimization flags fallback to -O2
222 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
223 NEW_CFLAGS="${NEW_CFLAGS} -O2"
224 fi
225 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
226 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
227 fi
228
109 set +f 229 set +f
230
231 use debug \
232 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
233 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
110 234
111 export CFLAGS="${NEW_CFLAGS}" 235 export CFLAGS="${NEW_CFLAGS}"
112 export CXXFLAGS="${NEW_CXXFLAGS}" 236 export CXXFLAGS="${NEW_CXXFLAGS}"
237 return 0
238}
239
240test_flag() {
241 if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then
242 echo "$@"
243 return 0
244 fi
245 return 1
246}
247
248strip-unsupported-flags() {
249 for x in ${CFLAGS} ; do
250 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
251 done
252 for x in ${CXXFLAGS} ; do
253 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
254 done
255
256 export CFLAGS="${NEW_CFLAGS}"
257 export CXXFLAGS="${NEW_CXXFLAGS}"
113} 258}
114 259
115get-flag() { 260get-flag() {
261 # this code looks a little flaky but seems to work for
262 # everything we want ...
263 # for example, if CFLAGS="-march=i686":
264 # `get-flags -march` == "-march=i686"
265 # `get-flags march` == "i686"
116 local findflag="$1" 266 local findflag="$1"
117
118 for f in ${CFLAGS} ${CXXFLAGS} ; do 267 for f in ${CFLAGS} ${CXXFLAGS} ; do
119 if [ "${f/${findflag}}" != "${f}" ] ; then 268 if [ "${f/${findflag}}" != "${f}" ] ; then
120 echo "${f/-${findflag}=}" 269 echo "${f/-${findflag}=}"
121 return 270 return 0
122 fi 271 fi
123 done 272 done
273 return 1
124} 274}
275
276has_pic() {
277 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
278 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
279 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
280 return 1
281}
282
283has_pie() {
284 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
285 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
286 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
287 return 1
288}
289
290has_ssp() {
291 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
292 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
293 return 1
294}
295
296replace-sparc64-flags() {
297 local SPARC64_CPUS="ultrasparc v9"
298
299 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
300 then
301 for x in ${SPARC64_CPUS}
302 do
303 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
304 done
305 else
306 for x in ${SPARC64_CPUS}
307 do
308 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
309 done
310 fi
311
312 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
313 then
314 for x in ${SPARC64_CPUS}
315 do
316 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
317 done
318 else
319 for x in ${SPARC64_CPUS}
320 do
321 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
322 done
323 fi
324}
325
326append-ldflags() {
327 LDFLAGS="${LDFLAGS} $@"
328 return 0
329}
330
331filter-ldflags() {
332 # we do this fancy spacing stuff so as to not filter
333 # out part of a flag ... we want flag atoms ! :D
334 LDFLAGS=" ${LDFLAGS} "
335 for x in "$@" ; do
336 LDFLAGS="${LDFLAGS// ${x} / }"
337 done
338 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
339 return 0
340}
341
342etexec-flags() {
343 has_pie || has_pic
344 if [ $? == 0 ] ; then
345 [ -z "`is-flag -fno-pic`" ] &&
346 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
347
348 [ -z "`is-flag -nopie`" ] &&
349 export CFLAGS="${CFLAGS} `test_flag -nopie`"
350 fi
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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