/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.26 Revision 1.37
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 1.26 2003/09/15 15:21:04 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.37 2004/02/21 07:19:29 vapier 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.
32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
28# 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 ####
35# 43#
36#### filter-mfpmath <math types> #### 44#### filter-mfpmath <math types> ####
37# Remove specified math types from the fpmath specification 45# Remove specified math types from the fpmath specification
38# If the user has -mfpmath=sse,386, running `filter-mfpmath sse` 46# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
39# will leave the user with -mfpmath=386 47# will leave the user with -mfpmath=386
48#
49#### append-ldflags ####
50# Add extra flags to your current LDFLAGS
51#
52#### etexec-flags ####
53# hooked function for hardened-gcc that appends
54# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
55# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
56#
57#### fstack-flags ####
58# hooked function for hardened-gcc that appends
59# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
60# and a package is filtering -fstack-protector, -fstack-protector-all
61#
40 62
41# C[XX]FLAGS that we allow in strip-flags 63# C[XX]FLAGS that we allow in strip-flags
64setup-allowed-flags() {
42ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
43case "${ARCH}" in 66 case "${ARCH}" in
44 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
45 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
46 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
47esac 71 esac
48 72
49# C[XX]FLAGS that we are think is ok, but needs testing 73 # C[XX]FLAGS that we are think is ok, but needs testing
50# NOTE: currently -Os have issues with gcc3 and K6* arch's 74 # NOTE: currently -Os have issues with gcc3 and K6* arch's
51UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
52 76 return 0
53filter-mfpmath() {
54 for a in $CFLAGS; do
55 if [ "${a:0:8}" == "-mfpmath" ]; then
56 orig_mfpmath=$a
57 fi
58 done
59
60 mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
61 for b in $@; do
62 mfpmath="${mfpmath/$b}"
63 done
64
65 if [ -z "${mfpmath/ }" ]; then
66 filter-flags "$orig_mfpmath"
67 else
68 new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
69 replace-flags "$orig_mfpmath" "$new_mfpmath"
70 fi
71} 77}
72 78
73filter-flags() { 79filter-flags() {
80 for x in "$@" ; do
81 case "${x}" in
82 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;;
83 -fstack-protector|-fstack-protector-all) fstack-flags;;
84 *) ;;
85 esac
86 done
87
74 # we do this fancy spacing stuff so as to not filter 88 # we do this fancy spacing stuff so as to not filter
75 # out part of a flag ... we want flag atoms ! :D 89 # out part of a flag ... we want flag atoms ! :D
76 CFLAGS=" ${CFLAGS} " 90 CFLAGS=" ${CFLAGS} "
77 CXXFLAGS=" ${CXXFLAGS} " 91 CXXFLAGS=" ${CXXFLAGS} "
78 for x in $@ ; do 92 for x in "$@" ; do
79 CFLAGS="${CFLAGS/ ${x} / }" 93 CFLAGS="${CFLAGS// ${x} / }"
80 CXXFLAGS="${CXXFLAGS/ ${x} / }" 94 CXXFLAGS="${CXXFLAGS// ${x} / }"
81 done 95 done
82 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
83 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
98 return 0
84} 99}
85 100
86append-flags() { 101append-flags() {
87 CFLAGS="${CFLAGS} $@" 102 export CFLAGS="${CFLAGS} $@"
88 CXXFLAGS="${CXXFLAGS} $@" 103 export CXXFLAGS="${CXXFLAGS} $@"
104 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
105 return 0
89} 106}
90 107
91replace-flags() { 108replace-flags() {
109 # we do this fancy spacing stuff so as to not filter
110 # out part of a flag ... we want flag atoms ! :D
111 CFLAGS=" ${CFLAGS} "
112 CXXFLAGS=" ${CXXFLAGS} "
92 CFLAGS="${CFLAGS/${1}/${2} }" 113 CFLAGS="${CFLAGS// ${1} / ${2} }"
93 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 114 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
115 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
116 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
117 return 0
118}
119
120replace-cpu-flags() {
121 local newcpu="$1" ; shift
122 local oldcpu=""
123 for oldcpu in "$@" ; do
124 replace-flags -march=${oldcpu} -march=${newcpu}
125 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
126 done
127 return 0
94} 128}
95 129
96is-flag() { 130is-flag() {
97 for x in ${CFLAGS} ${CXXFLAGS} ; do 131 for x in ${CFLAGS} ${CXXFLAGS} ; do
98 if [ "${x}" == "$1" ] ; then 132 if [ "${x}" == "$1" ] ; then
101 fi 135 fi
102 done 136 done
103 return 1 137 return 1
104} 138}
105 139
140filter-mfpmath() {
141 # save the original -mfpmath flag
142 local orig_mfpmath="`get-flag -mfpmath`"
143 # get the value of the current -mfpmath flag
144 local new_math=" `get-flag mfpmath | tr , ' '` "
145 # figure out which math values are to be removed
146 local prune_math=""
147 for prune_math in "$@" ; do
148 new_math="${new_math/ ${prune_math} / }"
149 done
150 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
151
152 if [ -z "${new_math}" ] ; then
153 # if we're removing all user specified math values are
154 # slated for removal, then we just filter the flag
155 filter-flags ${orig_mfpmath}
156 else
157 # if we only want to filter some of the user specified
158 # math values, then we replace the current flag
159 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
160 fi
161 return 0
162}
163
106strip-flags() { 164strip-flags() {
165 setup-allowed-flags
166
107 local NEW_CFLAGS="" 167 local NEW_CFLAGS=""
108 local NEW_CXXFLAGS="" 168 local NEW_CXXFLAGS=""
109 169
110 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 170 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
111 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 171 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
139 break 199 break
140 fi 200 fi
141 done 201 done
142 done 202 done
143 203
204 # In case we filtered out all optimization flags fallback to -O2
205 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
206 NEW_CFLAGS="${NEW_CFLAGS} -O2"
207 fi
208 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
209 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
210 fi
211
144 set +f 212 set +f
145 213
146 [ `use debug` ] \ 214 [ `use debug` ] \
147 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ 215 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
148 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" 216 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
149 217
150 export CFLAGS="${NEW_CFLAGS}" 218 export CFLAGS="${NEW_CFLAGS}"
151 export CXXFLAGS="${NEW_CXXFLAGS}" 219 export CXXFLAGS="${NEW_CXXFLAGS}"
220 return 0
221}
222
223test_flag() {
224 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
225 echo "$@"
226 return 0
227 fi
228 return 1
229}
230
231strip-unsupported-flags() {
232 for x in ${CFLAGS} ; do
233 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
234 done
235 for x in ${CXXFLAGS} ; do
236 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
237 done
238
239 export CFLAGS="${NEW_CFLAGS}"
240 export CXXFLAGS="${NEW_CXXFLAGS}"
152} 241}
153 242
154get-flag() { 243get-flag() {
244 # this code looks a little flaky but seems to work for
245 # everything we want ...
246 # for example, if CFLAGS="-march=i686":
247 # `get-flags -march` == "-march=i686"
248 # `get-flags march` == "i686"
155 local findflag="$1" 249 local findflag="$1"
156
157 for f in ${CFLAGS} ${CXXFLAGS} ; do 250 for f in ${CFLAGS} ${CXXFLAGS} ; do
158 if [ "${f/${findflag}}" != "${f}" ] ; then 251 if [ "${f/${findflag}}" != "${f}" ] ; then
159 echo "${f/-${findflag}=}" 252 echo "${f/-${findflag}=}"
160 return 253 return 0
161 fi 254 fi
162 done 255 done
256 return 1
163} 257}
164 258
165replace-sparc64-flags() { 259replace-sparc64-flags() {
166 local SPARC64_CPUS="ultrasparc v9" 260 local SPARC64_CPUS="ultrasparc v9"
167 261
189 do 283 do
190 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
191 done 285 done
192 fi 286 fi
193} 287}
288
289append-ldflags() {
290 LDFLAGS="${LDFLAGS} $@"
291 return 0
292}
293
294etexec-flags() {
295 has_version sys-devel/hardened-gcc
296 if [ $? == 0 ] ; then
297 if [ "`is-flag -yet_exec`" != "true" ]; then
298 debug-print ">>> appending flags -yet_exec"
299 append-flags -yet_exec
300 append-ldflags -yet_exec
301 fi
302 fi
303}
304
305fstack-flags() {
306 has_version sys-devel/hardened-gcc
307 if [ $? == 0 ] ; then
308 if [ "`is-flag -yno_propolice`" != "true" ]; then
309 debug-print ">>> appending flags -yno_propolice"
310 append-flags -yno_propolice
311 append-ldflags -yno_propolice
312 fi
313 fi
314}

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