/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.24 Revision 1.43
1# Copyright 1999-2003 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 1.24 2003/07/22 12:48:11 aliz Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.43 2004/04/06 04:25:16 tseng Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Author Bart Verwilst <verwilst@gentoo.org>
6 6
7ECLASS=flag-o-matic 7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS" 8INHERITED="$INHERITED $ECLASS"
16# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
17# 17#
18#### replace-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one 19# Replace a flag by another one
20# 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#
21#### is-flag <flag> #### 25#### is-flag <flag> ####
22# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
23# Matches only complete a flag 27# Matches only complete a flag
24# 28#
25#### strip-flags #### 29#### strip-flags ####
26# Strip C[XX]FLAGS of everything except known 30# Strip C[XX]FLAGS of everything except known
27# good options. 31# good options.
28# 32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
29#### get-flag <flag> #### 37#### get-flag <flag> ####
30# Find and echo the value for a particular flag 38# Find and echo the value for a particular flag
31# 39#
32#### replace-sparc64-flags #### 40#### replace-sparc64-flags ####
33# Sets mcpu to v8 and uses the original value 41# Sets mcpu to v8 and uses the original value
34# as mtune if none specified. 42# as mtune if none specified.
35# 43#
36 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# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
59# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
60#
61#### fstack-flags ####
62# hooked function for hardened-gcc that appends
63# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
64# and a package is filtering -fstack-protector, -fstack-protector-all
65#
37 66
38# C[XX]FLAGS that we allow in strip-flags 67# C[XX]FLAGS that we allow in strip-flags
68setup-allowed-flags() {
39ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 69 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
40case "${ARCH}" in 70 case "${ARCH}" in
41 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
42 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 72 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
73 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
74 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
43esac 75 esac
44 76
45# C[XX]FLAGS that we are think is ok, but needs testing 77 # C[XX]FLAGS that we are think is ok, but needs testing
46# NOTE: currently -Os have issues with gcc3 and K6* arch's 78 # NOTE: currently -Os have issues with gcc3 and K6* arch's
47UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 79 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
48 80 return 0
49filter-mfpmath() {
50 for a in $CFLAGS; do
51 if [ "${a:0:8}" == "-mfpmath" ]; then
52 orig_mfpmath=$a
53 fi
54 done
55
56 mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
57 for b in $@; do
58 mfpmath="${mfpmath/$b}"
59 done
60
61 if [ -z "${mfpmath/ }" ]; then
62 filter-flags "$orig_mfpmath"
63 else
64 new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
65 replace-flags "$orig_mfpmath" "$new_mfpmath"
66 fi
67} 81}
68 82
69filter-flags() { 83filter-flags() {
84 for x in "$@" ; do
85 case "${x}" in
86 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
87 -fstack-protector|-fstack-protector-all) fstack-flags;;
88 *) ;;
89 esac
90 done
91
70 # we do this fancy spacing stuff so as to not filter 92 # we do this fancy spacing stuff so as to not filter
71 # out part of a flag ... we want flag atoms ! :D 93 # out part of a flag ... we want flag atoms ! :D
72 export CFLAGS=" ${CFLAGS} " 94 CFLAGS=" ${CFLAGS} "
73 export CXXFLAGS=" ${CXXFLAGS} " 95 CXXFLAGS=" ${CXXFLAGS} "
74 for x in $@ ; do 96 for x in "$@" ; do
75 export CFLAGS="${CFLAGS/ ${x} / }" 97 CFLAGS="${CFLAGS// ${x} / }"
76 export CXXFLAGS="${CXXFLAGS/ ${x} / }" 98 CXXFLAGS="${CXXFLAGS// ${x} / }"
77 done 99 done
78 export CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 100 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
79 export CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 101 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
102 return 0
103}
104
105filter-lfs-flags() {
106 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
80} 107}
81 108
82append-flags() { 109append-flags() {
83 CFLAGS="${CFLAGS} $@" 110 export CFLAGS="${CFLAGS} $@"
84 CXXFLAGS="${CXXFLAGS} $@" 111 export CXXFLAGS="${CXXFLAGS} $@"
112 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
113 return 0
85} 114}
86 115
87replace-flags() { 116replace-flags() {
117 # we do this fancy spacing stuff so as to not filter
118 # out part of a flag ... we want flag atoms ! :D
119 CFLAGS=" ${CFLAGS} "
120 CXXFLAGS=" ${CXXFLAGS} "
88 CFLAGS="${CFLAGS/${1}/${2} }" 121 CFLAGS="${CFLAGS// ${1} / ${2} }"
89 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 122 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
123 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
124 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
125 return 0
126}
127
128replace-cpu-flags() {
129 local newcpu="$1" ; shift
130 local oldcpu=""
131 for oldcpu in "$@" ; do
132 replace-flags -march=${oldcpu} -march=${newcpu}
133 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
134 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
135 done
136 return 0
90} 137}
91 138
92is-flag() { 139is-flag() {
93 for x in ${CFLAGS} ${CXXFLAGS} ; do 140 for x in ${CFLAGS} ${CXXFLAGS} ; do
94 if [ "${x}" == "$1" ] ; then 141 if [ "${x}" == "$1" ] ; then
97 fi 144 fi
98 done 145 done
99 return 1 146 return 1
100} 147}
101 148
149filter-mfpmath() {
150 # save the original -mfpmath flag
151 local orig_mfpmath="`get-flag -mfpmath`"
152 # get the value of the current -mfpmath flag
153 local new_math=" `get-flag mfpmath | tr , ' '` "
154 # figure out which math values are to be removed
155 local prune_math=""
156 for prune_math in "$@" ; do
157 new_math="${new_math/ ${prune_math} / }"
158 done
159 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
160
161 if [ -z "${new_math}" ] ; then
162 # if we're removing all user specified math values are
163 # slated for removal, then we just filter the flag
164 filter-flags ${orig_mfpmath}
165 else
166 # if we only want to filter some of the user specified
167 # math values, then we replace the current flag
168 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
169 fi
170 return 0
171}
172
102strip-flags() { 173strip-flags() {
174 setup-allowed-flags
175
103 local NEW_CFLAGS="" 176 local NEW_CFLAGS=""
104 local NEW_CXXFLAGS="" 177 local NEW_CXXFLAGS=""
105 178
106 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 179 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
107 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 180 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
135 break 208 break
136 fi 209 fi
137 done 210 done
138 done 211 done
139 212
213 # In case we filtered out all optimization flags fallback to -O2
214 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
215 NEW_CFLAGS="${NEW_CFLAGS} -O2"
216 fi
217 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
218 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
219 fi
220
140 set +f 221 set +f
141 222
142 [ `use debug` ] \ 223 [ `use debug` ] \
143 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ 224 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
144 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" 225 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
145 226
146 export CFLAGS="${NEW_CFLAGS}" 227 export CFLAGS="${NEW_CFLAGS}"
147 export CXXFLAGS="${NEW_CXXFLAGS}" 228 export CXXFLAGS="${NEW_CXXFLAGS}"
229 return 0
230}
231
232test_flag() {
233 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
234 echo "$@"
235 return 0
236 fi
237 return 1
238}
239
240strip-unsupported-flags() {
241 for x in ${CFLAGS} ; do
242 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
243 done
244 for x in ${CXXFLAGS} ; do
245 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
246 done
247
248 export CFLAGS="${NEW_CFLAGS}"
249 export CXXFLAGS="${NEW_CXXFLAGS}"
148} 250}
149 251
150get-flag() { 252get-flag() {
253 # this code looks a little flaky but seems to work for
254 # everything we want ...
255 # for example, if CFLAGS="-march=i686":
256 # `get-flags -march` == "-march=i686"
257 # `get-flags march` == "i686"
151 local findflag="$1" 258 local findflag="$1"
152
153 for f in ${CFLAGS} ${CXXFLAGS} ; do 259 for f in ${CFLAGS} ${CXXFLAGS} ; do
154 if [ "${f/${findflag}}" != "${f}" ] ; then 260 if [ "${f/${findflag}}" != "${f}" ] ; then
155 echo "${f/-${findflag}=}" 261 echo "${f/-${findflag}=}"
156 return 262 return 0
157 fi 263 fi
158 done 264 done
265 return 1
266}
267
268has_pic() {
269 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
270 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
271 [ has_version sys-devel/hardened-gcc ] && return 0
272 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
273 return 1
274}
275
276has_pie() {
277 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
278 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
279 [ has_version sys-devel/hardened-gcc ] && return 0
280 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
281 return 1
282}
283
284has_ssp() {
285 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
286 [ has_version sys-devel/hardened-gcc ] && return 0
287 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
288 return 1
159} 289}
160 290
161replace-sparc64-flags() { 291replace-sparc64-flags() {
162 local SPARC64_CPUS="ultrasparc v9" 292 local SPARC64_CPUS="ultrasparc v9"
163 293
185 do 315 do
186 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 316 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
187 done 317 done
188 fi 318 fi
189} 319}
320
321append-ldflags() {
322 LDFLAGS="${LDFLAGS} $@"
323 return 0
324}
325
326filter-ldflags() {
327 # we do this fancy spacing stuff so as to not filter
328 # out part of a flag ... we want flag atoms ! :D
329 LDFLAGS=" ${LDFLAGS} "
330 for x in "$@" ; do
331 LDFLAGS="${LDFLAGS// ${x} / }"
332 done
333 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
334 return 0
335}
336
337etexec-flags() {
338 has_pie || has_pic
339 if [ $? == 0 ] ; then
340 # strip -fPIC regardless if you've gotten this far
341 strip-flags -fPIC -fpic -fPIE -fpie -pie
342 if [ "`is-flag -yet_exec`" != "true" ]; then
343 # If our compile support -yet_exec, append it now
344 [ -z "`gcc -yet_exec -S -o /dev/null -xc /dev/null 2>&1`" ] \
345 && ( debug-print ">>> appending flags -yet_exec" ; \
346 append-flags -yet_exec ; append-ldflags -yet_exec )
347 fi
348 fi
349}
350
351fstack-flags() {
352 has_ssp
353 if [ $? == 0 ] ; then
354 # strip -fstack-protector regardless if you've gotten this far
355 strip-flags -fstack-protector -fstack-protector-all
356 if [ "`is-flag -yno_propolice`" != "true" ]; then
357 # If our compile support -yno_propolice, append it now
358 [ -z "`gcc -yno_propolice -S -o /dev/null -xc /dev/null 2>&1`" ] \
359 && ( debug-print ">>> appending flags -yno_propolice" ; \
360 append-flags -yno_propolice ; append-ldflags -yno_propolice )
361 fi
362 fi
363}

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