/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.24 Revision 1.50
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 1.50 2004/05/12 13:36:17 pappy 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# -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#
37 68
38# C[XX]FLAGS that we allow in strip-flags 69# C[XX]FLAGS that we allow in strip-flags
70setup-allowed-flags() {
71 if [ -z "${ALLOWED_FLAGS}" ] ; then
39ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 72 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
40case "${ARCH}" in 73 case "${ARCH}" in
41 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 74 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
42 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 75 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
76 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
77 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
43esac 78 esac
79 fi
44 80
45# C[XX]FLAGS that we are think is ok, but needs testing 81 # C[XX]FLAGS that we are think is ok, but needs testing
46# NOTE: currently -Os have issues with gcc3 and K6* arch's 82 # NOTE: currently -Os have issues with gcc3 and K6* arch's
47UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 83 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
48 84 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" "$new_mfpmath"
66 fi
67} 85}
68 86
69filter-flags() { 87filter-flags() {
88 for x in "$@" ; do
89 case "${x}" in
90 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
91 -fstack-protector|-fstack-protector-all) fstack-flags;;
92 *) ;;
93 esac
94 done
95
70 # we do this fancy spacing stuff so as to not filter 96 # we do this fancy spacing stuff so as to not filter
71 # out part of a flag ... we want flag atoms ! :D 97 # out part of a flag ... we want flag atoms ! :D
72 export CFLAGS=" ${CFLAGS} " 98 CFLAGS=" ${CFLAGS} "
73 export CXXFLAGS=" ${CXXFLAGS} " 99 CXXFLAGS=" ${CXXFLAGS} "
74 for x in $@ ; do 100 for x in "$@" ; do
75 export CFLAGS="${CFLAGS/ ${x} / }" 101 CFLAGS="${CFLAGS// ${x} / }"
76 export CXXFLAGS="${CXXFLAGS/ ${x} / }" 102 CXXFLAGS="${CXXFLAGS// ${x} / }"
77 done 103 done
78 export CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 104 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
79 export CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 105 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
106 return 0
107}
108
109filter-lfs-flags() {
110 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
111}
112
113append-lfs-flags() {
114 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
80} 115}
81 116
82append-flags() { 117append-flags() {
83 CFLAGS="${CFLAGS} $@" 118 export CFLAGS="${CFLAGS} $@"
84 CXXFLAGS="${CXXFLAGS} $@" 119 export CXXFLAGS="${CXXFLAGS} $@"
120 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
121 return 0
85} 122}
86 123
87replace-flags() { 124replace-flags() {
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=" ${CXXFLAGS} "
88 CFLAGS="${CFLAGS/${1}/${2} }" 129 CFLAGS="${CFLAGS// ${1} / ${2} }"
89 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 130 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
131 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
132 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
133 return 0
134}
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
90} 145}
91 146
92is-flag() { 147is-flag() {
93 for x in ${CFLAGS} ${CXXFLAGS} ; do 148 for x in ${CFLAGS} ${CXXFLAGS} ; do
94 if [ "${x}" == "$1" ] ; then 149 if [ "${x}" == "$1" ] ; then
97 fi 152 fi
98 done 153 done
99 return 1 154 return 1
100} 155}
101 156
157filter-mfpmath() {
158 # save the original -mfpmath flag
159 local orig_mfpmath="`get-flag -mfpmath`"
160 # get the value of the current -mfpmath flag
161 local new_math=" `get-flag mfpmath | tr , ' '` "
162 # figure out which math values are to be removed
163 local prune_math=""
164 for prune_math in "$@" ; 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
179}
180
102strip-flags() { 181strip-flags() {
182 setup-allowed-flags
183
103 local NEW_CFLAGS="" 184 local NEW_CFLAGS=""
104 local NEW_CXXFLAGS="" 185 local NEW_CXXFLAGS=""
105 186
106 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 187 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
107 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 188 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
108 [ `use debug` ] && einfo "Enabling the use of some unstable flags" 189 use debug && einfo "Enabling the use of some unstable flags"
109 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 190 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
110 fi 191 fi
111 192
112 set -f 193 set -f
113 194
135 break 216 break
136 fi 217 fi
137 done 218 done
138 done 219 done
139 220
221 # In case we filtered out all optimization flags fallback to -O2
222 if [ "${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="${NEW_CXXFLAGS} -O2"
227 fi
228
140 set +f 229 set +f
141 230
142 [ `use debug` ] \ 231 use debug \
143 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ 232 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
144 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" 233 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
145 234
146 export CFLAGS="${NEW_CFLAGS}" 235 export CFLAGS="${NEW_CFLAGS}"
147 export CXXFLAGS="${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}"
148} 258}
149 259
150get-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"
151 local findflag="$1" 266 local findflag="$1"
152
153 for f in ${CFLAGS} ${CXXFLAGS} ; do 267 for f in ${CFLAGS} ${CXXFLAGS} ; do
154 if [ "${f/${findflag}}" != "${f}" ] ; then 268 if [ "${f/${findflag}}" != "${f}" ] ; then
155 echo "${f/-${findflag}=}" 269 echo "${f/-${findflag}=}"
156 return 270 return 0
157 fi 271 fi
158 done 272 done
273 return 1
274}
275
276has_pic() {
277 [ "${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
159} 294}
160 295
161replace-sparc64-flags() { 296replace-sparc64-flags() {
162 local SPARC64_CPUS="ultrasparc v9" 297 local SPARC64_CPUS="ultrasparc v9"
163 298
185 do 320 do
186 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 321 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
187 done 322 done
188 fi 323 fi
189} 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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