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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 1.76 2004/10/30 00:00:14 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 $ECLASS"
9
9IUSE="$IUSE debug" 10IUSE="debug"
11
12# need access to emktemp()
13inherit eutils toolchain-funcs
10 14
11# 15#
12#### filter-flags <flags> #### 16#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS 17# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags 18# Matches only complete flags
17# Add extra flags to your current C[XX]FLAGS 21# Add extra flags to your current C[XX]FLAGS
18# 22#
19#### replace-flags <orig.flag> <new.flag> ### 23#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one 24# Replace a flag by another one
21# 25#
22#### replace-cpu-flags <new.cpu> <old.cpus> ### 26#### replace-cpu-flags <old.cpus> <new.cpu> ###
23# Replace march/mcpu flags that specify <old.cpus> 27# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu> 28# with flags that specify <new.cpu>
25# 29#
26#### is-flag <flag> #### 30#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS 31# Returns "true" if flag is set in C[XX]FLAGS
68# 72#
69 73
70# C[XX]FLAGS that we allow in strip-flags 74# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() { 75setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 76 if [ -z "${ALLOWED_FLAGS}" ] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 77 export ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
74 case "${ARCH}" in 82 case "${ARCH}" in
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
80 esac 88 esac
81 fi 89 fi
90 # allow a bunch of flags that negate features / control ABI
91 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
92 case "${ARCH}" in
93 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
94 esac
95 ALLOWED_FLAGS="${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 96
83 # C[XX]FLAGS that we are think is ok, but needs testing 97 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's 98 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 99 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0 100 return 0
87} 101}
88 102
89filter-flags() { 103filter-flags() {
90 local x 104 local x f fset
105 declare -a new_CFLAGS new_CXXFLAGS
91 106
92 for x in "$@" ; do 107 for x in "$@" ; do
93 case "${x}" in 108 case "${x}" in
94 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 109 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
95 -fstack-protector|-fstack-protector-all) fstack-flags;; 110 -fstack-protector|-fstack-protector-all) fstack-flags;;
96 *) ;;
97 esac 111 esac
98 done 112 done
99 113
100 # we do this fancy spacing stuff so as to not filter 114 for fset in CFLAGS CXXFLAGS; do
101 # out part of a flag ... we want flag atoms ! :D 115 # Looping over the flags instead of using a global
102 CFLAGS=" ${CFLAGS} " 116 # substitution ensures that we're working with flag atoms.
103 CXXFLAGS=" ${CXXFLAGS} " 117 # Otherwise globs like -O* have the potential to wipe out the
118 # list of flags.
119 for f in ${!fset}; do
104 for x in "$@" ; do 120 for x in "$@"; do
105 CFLAGS="${CFLAGS// ${x} / }" 121 # Note this should work with globs like -O*
106 CXXFLAGS="${CXXFLAGS// ${x} / }" 122 [[ ${f} == ${x} ]] && continue 2
123 done
124 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
107 done 125 done
108 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 126 eval export ${fset}=\${new_${fset}\[*]}
109 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 127 done
128
110 return 0 129 return 0
111} 130}
112 131
113filter-lfs-flags() { 132filter-lfs-flags() {
114 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 133 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
125 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 144 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
126 return 0 145 return 0
127} 146}
128 147
129replace-flags() { 148replace-flags() {
130 # we do this fancy spacing stuff so as to not filter 149 local f fset
131 # out part of a flag ... we want flag atoms ! :D 150 declare -a new_CFLAGS new_CXXFLAGS
132 CFLAGS=" ${CFLAGS} " 151
133 CXXFLAGS=" ${CXXFLAGS} " 152 for fset in CFLAGS CXXFLAGS; do
134 CFLAGS="${CFLAGS// ${1} / ${2} }" 153 # Looping over the flags instead of using a global
135 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 154 # substitution ensures that we're working with flag atoms.
136 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 155 # Otherwise globs like -O* have the potential to wipe out the
137 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 156 # list of flags.
157 for f in ${!fset}; do
158 # Note this should work with globs like -O*
159 [[ ${f} == ${1} ]] && f=${2}
160 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
161 done
162 eval export ${fset}=\${new_${fset}\[*]}
163 done
164
138 return 0 165 return 0
139} 166}
140 167
141replace-cpu-flags() { 168replace-cpu-flags() {
142 local oldcpu newcpu="$1" ; shift 169 local newcpu="$#" ; newcpu="${!newcpu}"
143 for oldcpu in "$@" ; do 170 while [ $# -gt 1 ] ; do
171 # quote to make sure that no globbing is done (particularly on
172 # ${oldcpu} prior to calling replace-flags
144 replace-flags -march=${oldcpu} -march=${newcpu} 173 replace-flags "-march=${1}" "-march=${newcpu}"
145 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 174 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
146 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 175 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
176 shift
147 done 177 done
148 return 0 178 return 0
149} 179}
150 180
151is-flag() { 181is-flag() {
152 local x 182 local x
153 183
154 for x in ${CFLAGS} ${CXXFLAGS} ; do 184 for x in ${CFLAGS} ${CXXFLAGS} ; do
185 # Note this should work with globs like -mcpu=ultrasparc*
155 if [ "${x}" == "$1" ] ; then 186 if [[ ${x} == ${1} ]]; then
156 echo true 187 echo true
157 return 0 188 return 0
158 fi 189 fi
159 done 190 done
160 return 1 191 return 1
203 set -f # disable pathname expansion 234 set -f # disable pathname expansion
204 235
205 for x in ${CFLAGS}; do 236 for x in ${CFLAGS}; do
206 for y in ${ALLOWED_FLAGS}; do 237 for y in ${ALLOWED_FLAGS}; do
207 flag=${x%%=*} 238 flag=${x%%=*}
208 if [ "${flag%%${y}}" = "" ]; then 239 if [ "${flag%%${y}}" = "" ] ; then
209 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 240 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
210 break 241 break
211 fi 242 fi
212 done 243 done
213 done 244 done
214 245
215 for x in ${CXXFLAGS}; do 246 for x in ${CXXFLAGS}; do
216 for y in ${ALLOWED_FLAGS}; do 247 for y in ${ALLOWED_FLAGS}; do
217 flag=${x%%=*} 248 flag=${x%%=*}
218 if [ "${flag%%${y}}" = "" ]; then 249 if [ "${flag%%${y}}" = "" ] ; then
219 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 250 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
220 break 251 break
221 fi 252 fi
222 done 253 done
223 done 254 done
230 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 261 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
231 fi 262 fi
232 263
233 set +f # re-enable pathname expansion 264 set +f # re-enable pathname expansion
234 265
235 useq debug \
236 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
237 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
238
239 export CFLAGS="${NEW_CFLAGS}" 266 export CFLAGS="${NEW_CFLAGS}"
240 export CXXFLAGS="${NEW_CXXFLAGS}" 267 export CXXFLAGS="${NEW_CXXFLAGS}"
241 return 0 268 return 0
242} 269}
243 270
244test_flag() { 271test_flag() {
245 local cc=${CC:-gcc} ; cc=${cc%% *} 272 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
246 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
247 printf "%s\n" "$*" 273 printf "%s\n" "$*"
248 return 0 274 return 0
249 fi 275 fi
250 return 1 276 return 1
251} 277}
252 278
253test_version_info() { 279test_version_info() {
254 local cc=${CC:-gcc} ; cc=${cc%% *}
255 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 280 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
256 return 0 281 return 0
257 else 282 else
258 return 1 283 return 1
259 fi 284 fi
260} 285}
289 done 314 done
290 return 1 315 return 1
291} 316}
292 317
293has_hardened() { 318has_hardened() {
294 test_version_info Hardened 319 test_version_info Hardened && return 0
320 # the specs file wont exist unless gcc has GCC_SPECS support
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
322 return 0
295 return $? 323 return 1
296} 324}
297 325
298has_pic() { 326has_pic() {
299 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 327 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
300 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 328 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
314 test_version_info ssp && return 0 342 test_version_info ssp && return 0
315 return 1 343 return 1
316} 344}
317 345
318has_m64() { 346has_m64() {
319 test_flag -m64 347 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future
350 # clean-up!
351 local temp="$(emktemp)"
352 echo "int main() { return(0); }" > ${temp}.c
353 MY_CC=$(tc-getCC)
354 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
355 local ret=$?
356 rm -f ${temp}.c
357 [ "$ret" != "1" ] && return 0
320 return $? 358 return 1
321} 359}
322 360
323has_m32() { 361has_m32() {
324 test_flag -m32 362 # this doesnt test if the flag is accepted, it tests if the flag
363 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
364 # please dont replace this function with test_flag in some future
365 # clean-up!
366 local temp="$(emktemp)"
367 echo "int main() { return(0); }" > ${temp}.c
368 MY_CC=$(tc-getCC)
369 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
370 local ret=$?
371 rm -f ${temp}.c
372 [ "$ret" != "1" ] && return 0
325 return $? 373 return 1
326} 374}
327 375
328replace-sparc64-flags() { 376replace-sparc64-flags() {
329 local SPARC64_CPUS="ultrasparc v9" 377 local SPARC64_CPUS="ultrasparc v9"
330 378
345 else 393 else
346 for x in ${SPARC64_CPUS}; do 394 for x in ${SPARC64_CPUS}; do
347 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 395 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
348 done 396 done
349 fi 397 fi
398
399 export CFLAGS CXXFLAGS
350} 400}
351 401
352append-ldflags() { 402append-ldflags() {
353 LDFLAGS="${LDFLAGS} $*" 403 export LDFLAGS="${LDFLAGS} $*"
354 return 0 404 return 0
355} 405}
356 406
357filter-ldflags() { 407filter-ldflags() {
358 local x 408 local x
362 LDFLAGS=" ${LDFLAGS} " 412 LDFLAGS=" ${LDFLAGS} "
363 for x in "$@" ; do 413 for x in "$@" ; do
364 LDFLAGS="${LDFLAGS// ${x} / }" 414 LDFLAGS="${LDFLAGS// ${x} / }"
365 done 415 done
366 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 416 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
417 export LDFLAGS
367 return 0 418 return 0
368} 419}
369 420
370etexec-flags() { 421etexec-flags() {
371 # if you're not using a hardened compiler you wont need this 422 # if you're not using a hardened compiler you wont need this
372 # PIC/no-pic kludge in the first place. 423 # PIC/no-pic kludge in the first place.
373 has_hardened || return 0 424 has_hardened || return 0
425 # this kludge breaks on amd64, and probably other -fPIC dependant
426 # archs.
427 use amd64 && return 0
374 428
375 if has_pie || has_pic; then 429 if has_pie || has_pic; then
376 [ -z "`is-flag -fno-pic`" ] && 430 [ -z "`is-flag -fno-pic`" ] &&
377 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 431 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
378 [ -z "`is-flag -nopie`" ] && 432 [ -z "`is-flag -nopie`" ] &&
386 [ -z "`is-flag -fno-stack-protector`" ] && 440 [ -z "`is-flag -fno-stack-protector`" ] &&
387 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 441 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
388 fi 442 fi
389 return 0 443 return 0
390} 444}
445
446# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
447# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
448# fixes.
449#
450# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
451gcc2-flags() {
452 CFLAGS=${CFLAGS//pentium-mmx/i586}
453 CFLAGS=${CFLAGS//pentium[234]/i686}
454 CFLAGS=${CFLAGS//k6-[23]/k6}
455 CFLAGS=${CFLAGS//athlon-tbird/i686}
456 CFLAGS=${CFLAGS//athlon-4/i686}
457 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
458 CFLAGS=${CFLAGS//athlon/i686}
459
460 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
461 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
462 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
463 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
464 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
465 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
466 CXXFLAGS=${CXXFLAGS//athlon/i686}
467
468 if [ "$ARCH" = alpha ]; then
469 CHOST=${CHOST/#alphaev6[78]/alphaev6}
470 CFLAGS=${CFLAGS//ev6[78]/ev6}
471 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
472 fi
473
474 export CFLAGS CXXFLAGS
475}

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