/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.58 Revision 1.71
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2004 Gentoo Foundation
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 1.58 2004/06/10 15:28:56 agriffis Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.71 2004/10/01 10:00:36 robbat2 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"
9
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
9IUSE="$IUSE debug" 12IUSE="${IUSE} debug"
10 13
11# 14#
12#### filter-flags <flags> #### 15#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS 16# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags 17# Matches only complete flags
17# Add extra flags to your current C[XX]FLAGS 20# Add extra flags to your current C[XX]FLAGS
18# 21#
19#### replace-flags <orig.flag> <new.flag> ### 22#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one 23# Replace a flag by another one
21# 24#
22#### replace-cpu-flags <new.cpu> <old.cpus> ### 25#### replace-cpu-flags <old.cpus> <new.cpu> ###
23# Replace march/mcpu flags that specify <old.cpus> 26# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu> 27# with flags that specify <new.cpu>
25# 28#
26#### is-flag <flag> #### 29#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS 30# Returns "true" if flag is set in C[XX]FLAGS
68# 71#
69 72
70# C[XX]FLAGS that we allow in strip-flags 73# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() { 74setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 75 if [ -z "${ALLOWED_FLAGS}" ] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g"
74 case "${ARCH}" in 77 case "${ARCH}" in
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
80 esac 83 esac
81 fi 84 fi
85 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
87 case "${ARCH}" in
88 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
89 esac
90 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
82 91
83 # C[XX]FLAGS that we are think is ok, but needs testing 92 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's 93 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 94 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0 95 return 0
87} 96}
88 97
89filter-flags() { 98filter-flags() {
90 local x 99 local x f fset
100 declare -a new_CFLAGS new_CXXFLAGS
91 101
92 for x in "$@" ; do 102 for x in "$@" ; do
93 case "${x}" in 103 case "${x}" in
94 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 104 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
95 -fstack-protector|-fstack-protector-all) fstack-flags;; 105 -fstack-protector|-fstack-protector-all) fstack-flags;;
96 *) ;;
97 esac 106 esac
98 done 107 done
99 108
100 # we do this fancy spacing stuff so as to not filter 109 for fset in CFLAGS CXXFLAGS; do
101 # out part of a flag ... we want flag atoms ! :D 110 # Looping over the flags instead of using a global
102 CFLAGS=" ${CFLAGS} " 111 # substitution ensures that we're working with flag atoms.
103 CXXFLAGS=" ${CXXFLAGS} " 112 # Otherwise globs like -O* have the potential to wipe out the
113 # list of flags.
114 for f in ${!fset}; do
104 for x in "$@" ; do 115 for x in "$@"; do
105 CFLAGS="${CFLAGS// ${x} / }" 116 # Note this should work with globs like -O*
106 CXXFLAGS="${CXXFLAGS// ${x} / }" 117 [[ ${f} == ${x} ]] && continue 2
118 done
119 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
107 done 120 done
108 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 121 eval export ${fset}=\${new_${fset}\[*]}
109 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 122 done
123
110 return 0 124 return 0
111} 125}
112 126
113filter-lfs-flags() { 127filter-lfs-flags() {
114 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 128 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
125 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 139 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
126 return 0 140 return 0
127} 141}
128 142
129replace-flags() { 143replace-flags() {
130 # we do this fancy spacing stuff so as to not filter 144 local f fset
131 # out part of a flag ... we want flag atoms ! :D 145 declare -a new_CFLAGS new_CXXFLAGS
132 CFLAGS=" ${CFLAGS} " 146
133 CXXFLAGS=" ${CXXFLAGS} " 147 for fset in CFLAGS CXXFLAGS; do
134 CFLAGS="${CFLAGS// ${1} / ${2} }" 148 # Looping over the flags instead of using a global
135 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 149 # substitution ensures that we're working with flag atoms.
136 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 150 # Otherwise globs like -O* have the potential to wipe out the
137 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 151 # list of flags.
152 for f in ${!fset}; do
153 # Note this should work with globs like -O*
154 [[ ${f} == ${1} ]] && f=${2}
155 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
156 done
157 eval export ${fset}=\${new_${fset}\[*]}
158 done
159
138 return 0 160 return 0
139} 161}
140 162
141replace-cpu-flags() { 163replace-cpu-flags() {
142 local oldcpu newcpu="$1" ; shift 164 local newcpu="$#" ; newcpu="${!newcpu}"
143 for oldcpu in "$@" ; do 165 while [ $# -gt 1 ] ; do
166 # quote to make sure that no globbing is done (particularly on
167 # ${oldcpu} prior to calling replace-flags
144 replace-flags -march=${oldcpu} -march=${newcpu} 168 replace-flags "-march=${1}" "-march=${newcpu}"
145 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 169 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
146 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 170 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
171 shift
147 done 172 done
148 return 0 173 return 0
149} 174}
150 175
151is-flag() { 176is-flag() {
152 local x 177 local x
153 178
154 for x in ${CFLAGS} ${CXXFLAGS} ; do 179 for x in ${CFLAGS} ${CXXFLAGS} ; do
180 # Note this should work with globs like -mcpu=ultrasparc*
155 if [ "${x}" == "$1" ] ; then 181 if [[ ${x} == ${1} ]]; then
156 echo true 182 echo true
157 return 0 183 return 0
158 fi 184 fi
159 done 185 done
160 return 1 186 return 1
203 set -f # disable pathname expansion 229 set -f # disable pathname expansion
204 230
205 for x in ${CFLAGS}; do 231 for x in ${CFLAGS}; do
206 for y in ${ALLOWED_FLAGS}; do 232 for y in ${ALLOWED_FLAGS}; do
207 flag=${x%%=*} 233 flag=${x%%=*}
208 if [ "${flag%%${y}}" = "" ]; then 234 if [ "${flag%%${y}}" = "" ] ; then
209 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 235 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
210 break 236 break
211 fi 237 fi
212 done 238 done
213 done 239 done
214 240
215 for x in ${CXXFLAGS}; do 241 for x in ${CXXFLAGS}; do
216 for y in ${ALLOWED_FLAGS}; do 242 for y in ${ALLOWED_FLAGS}; do
217 flag=${x%%=*} 243 flag=${x%%=*}
218 if [ "${flag%%${y}}" = "" ]; then 244 if [ "${flag%%${y}}" = "" ] ; then
219 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 245 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
220 break 246 break
221 fi 247 fi
222 done 248 done
223 done 249 done
229 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 255 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
230 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 256 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
231 fi 257 fi
232 258
233 set +f # re-enable pathname expansion 259 set +f # re-enable pathname expansion
234
235 useq debug \
236 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
237 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
238 260
239 export CFLAGS="${NEW_CFLAGS}" 261 export CFLAGS="${NEW_CFLAGS}"
240 export CXXFLAGS="${NEW_CXXFLAGS}" 262 export CXXFLAGS="${NEW_CXXFLAGS}"
241 return 0 263 return 0
242} 264}
289 done 311 done
290 return 1 312 return 1
291} 313}
292 314
293has_hardened() { 315has_hardened() {
294 test_version_info Hardened 316 test_version_info Hardened && return 0
317 # the specs file wont exist unless gcc has GCC_SPECS support
318 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
319 return 0
295 return $? 320 return 1
296} 321}
297 322
298has_pic() { 323has_pic() {
299 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 324 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
300 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 325 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
314 test_version_info ssp && return 0 339 test_version_info ssp && return 0
315 return 1 340 return 1
316} 341}
317 342
318has_m64() { 343has_m64() {
319 test_flag -m64 344 # this doesnt test if the flag is accepted, it tests if the flag
345 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
346 # please dont replace this function with test_flag in some future
347 # clean-up!
348 temp=`mktemp`
349 echo "int main() { return(0); }" > ${temp}.c
350 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1
351 ret=$?
352 rm -f ${temp}.c
353 [ "$ret" != "1" ] && return 0
320 return $? 354 return 1
321} 355}
322 356
323has_m32() { 357has_m32() {
324 test_flag -m32 358 # this doesnt test if the flag is accepted, it tests if the flag
359 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
360 # please dont replace this function with test_flag in some future
361 # clean-up!
362 temp=`mktemp`
363 echo "int main() { return(0); }" > ${temp}.c
364 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
365 ret=$?
366 rm -f ${temp}.c
367 [ "$ret" != "1" ] && return 0
325 return $? 368 return 1
326} 369}
327 370
328replace-sparc64-flags() { 371replace-sparc64-flags() {
329 local SPARC64_CPUS="ultrasparc v9" 372 local SPARC64_CPUS="ultrasparc v9"
330 373
345 else 388 else
346 for x in ${SPARC64_CPUS}; do 389 for x in ${SPARC64_CPUS}; do
347 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 390 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
348 done 391 done
349 fi 392 fi
393
394 export CFLAGS CXXFLAGS
350} 395}
351 396
352append-ldflags() { 397append-ldflags() {
353 LDFLAGS="${LDFLAGS} $*" 398 export LDFLAGS="${LDFLAGS} $*"
354 return 0 399 return 0
355} 400}
356 401
357filter-ldflags() { 402filter-ldflags() {
358 local x 403 local x
362 LDFLAGS=" ${LDFLAGS} " 407 LDFLAGS=" ${LDFLAGS} "
363 for x in "$@" ; do 408 for x in "$@" ; do
364 LDFLAGS="${LDFLAGS// ${x} / }" 409 LDFLAGS="${LDFLAGS// ${x} / }"
365 done 410 done
366 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 411 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
412 export LDFLAGS
367 return 0 413 return 0
368} 414}
369 415
370etexec-flags() { 416etexec-flags() {
371 # if you're not using a hardened compiler you wont need this 417 # if you're not using a hardened compiler you wont need this
372 # PIC/no-pic kludge in the first place. 418 # PIC/no-pic kludge in the first place.
373 has_hardened || return 0 419 has_hardened || return 0
420 # this kludge breaks on amd64, and probably other -fPIC dependant
421 # archs.
422 use amd64 && return 0
374 423
375 if has_pie || has_pic; then 424 if has_pie || has_pic; then
376 [ -z "`is-flag -fno-pic`" ] && 425 [ -z "`is-flag -fno-pic`" ] &&
377 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 426 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
378 [ -z "`is-flag -nopie`" ] && 427 [ -z "`is-flag -nopie`" ] &&

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