/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.64 Revision 1.108
1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2006 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 1.64 2004/07/22 15:29:10 agriffis Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.108 2006/06/15 14:45:59 vapier Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Maintainer: base-system@gentoo.org
6 6
7ECLASS=flag-o-matic 7# need access to emktemp()
8INHERITED="$INHERITED $ECLASS" 8inherit eutils toolchain-funcs multilib
9
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
12IUSE="${IUSE} debug"
13 9
14# 10#
15#### filter-flags <flags> #### 11#### filter-flags <flags> ####
16# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
17# Matches only complete flags 13# Matches only complete flags
20# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
21# 17#
22#### replace-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
23# Replace a flag by another one 19# Replace a flag by another one
24# 20#
25#### replace-cpu-flags <new.cpu> <old.cpus> ### 21#### replace-cpu-flags <old.cpus> <new.cpu> ###
26# Replace march/mcpu flags that specify <old.cpus> 22# Replace march/mcpu flags that specify <old.cpus>
27# with flags that specify <new.cpu> 23# with flags that specify <new.cpu>
28# 24#
29#### is-flag <flag> #### 25#### is-flag[q] <flag> ####
30# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
31# Matches only complete a flag 27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
32# 34#
33#### strip-flags #### 35#### strip-flags ####
34# Strip C[XX]FLAGS of everything except known 36# Strip C[XX]FLAGS of everything except known
35# good options. 37# good options.
36# 38#
55# 57#
56#### filter-ldflags <flags> #### 58#### filter-ldflags <flags> ####
57# Remove particular flags from LDFLAGS 59# Remove particular flags from LDFLAGS
58# Matches only complete flags 60# Matches only complete flags
59# 61#
60#### etexec-flags #### 62#### bindnow-flags ####
61# hooked function for hardened gcc that appends 63# Returns the flags to enable "now" binding in the current selected linker.
62# -fno-pic to {C,CXX,LD}FLAGS
63# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
64# 64#
65#### fstack-flags #### 65################ DEPRECATED functions ################
66# hooked function for hardened gcc that appends 66# The following are still present to avoid breaking existing
67# -fno-stack-protector to {C,CXX,LD}FLAGS 67# code more than necessary; however they are deprecated. Please
68# when a package is filtering -fstack-protector, -fstack-protector-all 68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# notice: modern automatic specs files will also suppress -fstack-protector-all 69# need to know which hardened techs are active in the compiler.
70# when only -fno-stack-protector is given 70# See bug #100974
71#
72#### has_hardened ####
73# Returns true if the compiler has 'Hardened' in its version string,
74# (note; switched-spec vanilla compilers satisfy this condition) or
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all ####
86# Returns true if the compiler by default or with current CFLAGS
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
71# 92#
72 93
73# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
74setup-allowed-flags() { 95setup-allowed-flags() {
75 if [ -z "${ALLOWED_FLAGS}" ] ; then 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 97 export ALLOWED_FLAGS="-pipe"
77 case "${ARCH}" in 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
83 esac
84 fi 104 fi
105 # allow a bunch of flags that negate features / control ABI
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
108 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 -mieee -mieee-with-inexact \
112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
85 116
86 # C[XX]FLAGS that we are think is ok, but needs testing 117 # C[XX]FLAGS that we are think is ok, but needs testing
87 # NOTE: currently -Os have issues with gcc3 and K6* arch's 118 # NOTE: currently -Os have issues with gcc3 and K6* arch's
88 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 119 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
89 return 0 120 return 0
121}
122
123# inverted filters for hardened compiler. This is trying to unpick
124# the hardened compiler defaults.
125_filter-hardened() {
126 local f
127 for f in "$@" ; do
128 case "${f}" in
129 # Ideally we should only concern ourselves with PIE flags,
130 # not -fPIC or -fpic, but too many places filter -fPIC without
131 # thinking about -fPIE.
132 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
133 gcc-specs-pie || continue
134 is-flagq -nopie || append-flags -nopie;;
135 -fstack-protector)
136 gcc-specs-ssp || continue
137 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
138 -fstack-protector-all)
139 gcc-specs-ssp-to-all || continue
140 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
141 esac
142 done
143}
144
145# Remove occurrences of strings from variable given in $1
146# Strings removed are matched as globs, so for example
147# '-O*' would remove -O1, -O2 etc.
148_filter-var() {
149 local f x VAR VAL
150 declare -a new
151
152 VAR=$1
153 shift
154 eval VAL=\${${VAR}}
155 for f in ${VAL}; do
156 for x in "$@"; do
157 # Note this should work with globs like -O*
158 [[ ${f} == ${x} ]] && continue 2
159 done
160 eval new\[\${\#new\[@]}]=\${f}
161 done
162 eval export ${VAR}=\${new\[*]}
90} 163}
91 164
92filter-flags() { 165filter-flags() {
93 local x f fset 166 _filter-hardened "$@"
94 declare -a new_CFLAGS new_CXXFLAGS 167 _filter-var CFLAGS "$@"
95 168 _filter-var CXXFLAGS "$@"
96 for x in "$@" ; do
97 case "${x}" in
98 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
99 -fstack-protector|-fstack-protector-all) fstack-flags;;
100 esac
101 done
102
103 for fset in CFLAGS CXXFLAGS; do
104 # Looping over the flags instead of using a global
105 # substitution ensures that we're working with flag atoms.
106 # Otherwise globs like -O* have the potential to wipe out the
107 # list of flags.
108 for f in ${!fset}; do
109 for x in "$@"; do
110 # Note this should work with globs like -O*
111 [[ ${f} == ${x} ]] && continue 2
112 done
113 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
114 done
115 eval export ${fset}=\${new_${fset}\[*]}
116 done
117
118 return 0 169 return 0
119} 170}
120 171
121filter-lfs-flags() { 172filter-lfs-flags() {
173 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
122 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 174 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
123} 175}
124 176
125append-lfs-flags() { 177append-lfs-flags() {
178 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
126 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 179 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127} 180}
128 181
129append-flags() { 182append-flags() {
183 [[ -z $* ]] && return 0
130 export CFLAGS="${CFLAGS} $*" 184 export CFLAGS="${CFLAGS} $*"
131 export CXXFLAGS="${CXXFLAGS} $*" 185 export CXXFLAGS="${CXXFLAGS} $*"
132 [ -n "`is-flag -fno-stack-protector`" -o \
133 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
134 return 0 186 return 0
135} 187}
136 188
137replace-flags() { 189replace-flags() {
190 [[ $# != 2 ]] \
191 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
192 && die "replace-flags takes 2 arguments, not $#"
193
138 local f fset 194 local f fset
139 declare -a new_CFLAGS new_CXXFLAGS 195 declare -a new_CFLAGS new_CXXFLAGS
140 196
141 for fset in CFLAGS CXXFLAGS; do 197 for fset in CFLAGS CXXFLAGS; do
142 # Looping over the flags instead of using a global 198 # Looping over the flags instead of using a global
143 # substitution ensures that we're working with flag atoms. 199 # substitution ensures that we're working with flag atoms.
153 209
154 return 0 210 return 0
155} 211}
156 212
157replace-cpu-flags() { 213replace-cpu-flags() {
158 local oldcpu newcpu="$1" ; shift 214 local newcpu="$#" ; newcpu="${!newcpu}"
159 for oldcpu in "$@" ; do 215 while [ $# -gt 1 ] ; do
160 # quote to make sure that no globbing is done (particularly on 216 # quote to make sure that no globbing is done (particularly on
161 # ${oldcpu} prior to calling replace-flags 217 # ${oldcpu} prior to calling replace-flags
162 replace-flags "-march=${oldcpu}" "-march=${newcpu}" 218 replace-flags "-march=${1}" "-march=${newcpu}"
163 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}" 219 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
164 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}" 220 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
221 shift
165 done 222 done
166 return 0 223 return 0
167} 224}
168 225
169is-flag() { 226is-flagq() {
170 local x 227 local x
171 228
172 for x in ${CFLAGS} ${CXXFLAGS} ; do 229 for x in ${CFLAGS} ${CXXFLAGS} ; do
230 # Note this should work with globs like -mcpu=ultrasparc*
173 if [ "${x}" == "$1" ] ; then 231 if [[ ${x} == ${1} ]]; then
174 echo true
175 return 0 232 return 0
176 fi 233 fi
177 done 234 done
235 return 1
236}
237
238is-flag() {
239 if is-flagq ${1}; then
240 echo true
241 return 0
242 fi
243 return 1
244}
245
246is-ldflagq() {
247 local x
248
249 for x in ${LDFLAGS} ; do
250 # Note this should work with globs like -mcpu=ultrasparc*
251 if [[ ${x} == ${1} ]]; then
252 return 0
253 fi
254 done
255 return 1
256}
257
258is-ldflag() {
259 if is-ldflagq ${1}; then
260 echo true
261 return 0
262 fi
178 return 1 263 return 1
179} 264}
180 265
181filter-mfpmath() { 266filter-mfpmath() {
182 local orig_mfpmath new_math prune_math 267 local orig_mfpmath new_math prune_math
211 296
212 local NEW_CFLAGS="" 297 local NEW_CFLAGS=""
213 local NEW_CXXFLAGS="" 298 local NEW_CXXFLAGS=""
214 299
215 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 300 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
216 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 301 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
217 use debug && einfo "Enabling the use of some unstable flags"
218 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 302 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
219 fi 303 fi
220 304
221 set -f # disable pathname expansion 305 set -f # disable pathname expansion
222 306
223 for x in ${CFLAGS}; do 307 for x in ${CFLAGS}; do
224 for y in ${ALLOWED_FLAGS}; do 308 for y in ${ALLOWED_FLAGS}; do
225 flag=${x%%=*} 309 flag=${x%%=*}
226 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then 310 if [ "${flag%%${y}}" = "" ] ; then
227 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 311 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
228 break 312 break
229 fi 313 fi
230 done 314 done
231 done 315 done
232 316
233 for x in ${CXXFLAGS}; do 317 for x in ${CXXFLAGS}; do
234 for y in ${ALLOWED_FLAGS}; do 318 for y in ${ALLOWED_FLAGS}; do
235 flag=${x%%=*} 319 flag=${x%%=*}
236 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then 320 if [ "${flag%%${y}}" = "" ] ; then
237 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 321 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
238 break 322 break
239 fi 323 fi
240 done 324 done
241 done 325 done
253 export CFLAGS="${NEW_CFLAGS}" 337 export CFLAGS="${NEW_CFLAGS}"
254 export CXXFLAGS="${NEW_CXXFLAGS}" 338 export CXXFLAGS="${NEW_CXXFLAGS}"
255 return 0 339 return 0
256} 340}
257 341
342test-flag-PROG() {
343 local comp=$1
344 local flags="$2"
345
346 [[ -z ${comp} || -z ${flags} ]] && \
347 return 1
348
349 local PROG=$(tc-get${comp})
350 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
351 > /dev/null 2>&1
352}
353
354# Returns true if C compiler support given flag
355test-flag-CC() { test-flag-PROG "CC" "$1"; }
356
357# Returns true if C++ compiler support given flag
358test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
359
360test-flags-PROG() {
361 local comp=$1
362 local flags
363 local x
364
365 shift
366
367 [[ -z ${comp} ]] && \
368 return 1
369
370 for x in "$@" ; do
371 test-flag-${comp} "${x}" && flags="${flags} ${x}"
372 done
373
374 echo "${flags}"
375
376 # Just bail if we dont have any flags
377 [[ -n ${flags} ]]
378}
379
380# Returns (echo's) the given flags supported by the C compiler
381test-flags-CC() { test-flags-PROG "CC" "$@"; }
382
383# Returns (echo's) the given flags supported by the C++ compiler
384test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
385
386# Short-hand that should hopefully work for both C and C++ compiler, but
387# its really only present due to the append-flags() abomination.
388test-flags() { test-flags-CC "$@"; }
389
390# Depriciated, use test-flags()
258test_flag() { 391test_flag() {
259 local cc=${CC:-gcc} ; cc=${cc%% *} 392 ewarn "test_flag: deprecated, please use test-flags()!" >&2
260 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then 393
261 printf "%s\n" "$*" 394 test-flags-CC "$@"
262 return 0
263 fi
264 return 1
265} 395}
266 396
267test_version_info() { 397test_version_info() {
268 local cc=${CC:-gcc} ; cc=${cc%% *}
269 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 398 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
270 return 0 399 return 0
271 else 400 else
272 return 1 401 return 1
273 fi 402 fi
274} 403}
275 404
276strip-unsupported-flags() { 405strip-unsupported-flags() {
277 local NEW_CFLAGS NEW_CXXFLAGS 406 local x NEW_CFLAGS NEW_CXXFLAGS
278 407
279 for x in ${CFLAGS} ; do 408 for x in ${CFLAGS} ; do
280 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 409 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
281 done 410 done
282 for x in ${CXXFLAGS} ; do 411 for x in ${CXXFLAGS} ; do
283 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" 412 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
284 done 413 done
285 414
286 export CFLAGS="${NEW_CFLAGS}" 415 export CFLAGS=${NEW_CFLAGS}
287 export CXXFLAGS="${NEW_CXXFLAGS}" 416 export CXXFLAGS=${NEW_CXXFLAGS}
288} 417}
289 418
290get-flag() { 419get-flag() {
291 local f findflag="$1" 420 local f findflag="$1"
292 421
302 fi 431 fi
303 done 432 done
304 return 1 433 return 1
305} 434}
306 435
436# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
307has_hardened() { 437has_hardened() {
438 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
439
308 test_version_info Hardened 440 test_version_info Hardened && return 0
309 return $? 441 # The specs file wont exist unless gcc has GCC_SPECS support
442 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
310} 443}
311 444
445# DEPRECATED - use gcc-specs-pie from toolchain-funcs
446# indicate whether PIC is set
312has_pic() { 447has_pic() {
313 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 448 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
314 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
315 test_version_info pie && return 0
316 return 1
317}
318 449
450 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
451 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
452 gcc-specs-pie
453}
454
455# DEPRECATED - use gcc-specs-pie from toolchain-funcs
456# indicate whether PIE is set
319has_pie() { 457has_pie() {
320 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 458 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
321 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 459
322 test_version_info pie && return 0 460 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
323 return 1 461 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
462 gcc-specs-pie
324} 463}
325 464
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated for all functions
467has_ssp_all() {
468 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
469
470 # note; this matches only -fstack-protector-all
471 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
473 gcc-specs-ssp-all
474}
475
476# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
477# indicate whether code for SSP is being generated
326has_ssp() { 478has_ssp() {
479 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
480
481 # note; this matches both -fstack-protector and -fstack-protector-all
327 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 482 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
328 test_version_info ssp && return 0 483 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
329 return 1 484 gcc-specs-ssp
330} 485}
331 486
332has_m64() { 487has_m64() {
333 # this doesnt test if the flag is accepted, it tests if the flag 488 # this doesnt test if the flag is accepted, it tests if the flag
334 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 489 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
335 # please dont replace this function with test_flag in some future 490 # please dont replace this function with test_flag in some future
336 # clean-up! 491 # clean-up!
337 temp=`mktemp` 492
493 local temp="$(emktemp)"
338 echo "int main() { return(0); }" > ${temp}.c 494 echo "int main() { return(0); }" > "${temp}".c
339 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 495 MY_CC=$(tc-getCC)
340 ret=$? 496 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
497 local ret=$?
341 rm -f ${temp}.c 498 rm -f "${temp}".c
342 [ "$ret" != "1" ] && return 0 499 [[ ${ret} != 1 ]] && return 0
343 return 1 500 return 1
344} 501}
345 502
346has_m32() { 503has_m32() {
347 # this doesnt test if the flag is accepted, it tests if the flag 504 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 505 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future 506 # please dont replace this function with test_flag in some future
350 # clean-up! 507 # clean-up!
351 temp=`mktemp` 508
509 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
510
511 local temp=$(emktemp)
352 echo "int main() { return(0); }" > ${temp}.c 512 echo "int main() { return(0); }" > "${temp}".c
353 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 513 MY_CC=$(tc-getCC)
354 ret=$? 514 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
515 local ret=$?
355 rm -f ${temp}.c 516 rm -f "${temp}".c
356 [ "$ret" != "1" ] && return 0 517 [[ ${ret} != 1 ]] && return 0
357 return 1 518 return 1
358} 519}
359 520
360replace-sparc64-flags() { 521replace-sparc64-flags() {
361 local SPARC64_CPUS="ultrasparc v9" 522 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
362 523
363 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 524 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
364 for x in ${SPARC64_CPUS}; do 525 for x in ${SPARC64_CPUS}; do
365 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 526 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
366 done 527 done
367 else 528 else
368 for x in ${SPARC64_CPUS}; do 529 for x in ${SPARC64_CPUS}; do
369 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 530 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
370 done 531 done
371 fi 532 fi
372 533
373 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 534 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
374 for x in ${SPARC64_CPUS}; do 535 for x in ${SPARC64_CPUS}; do
375 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 536 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
376 done 537 done
377 else 538 else
378 for x in ${SPARC64_CPUS}; do 539 for x in ${SPARC64_CPUS}; do
382 543
383 export CFLAGS CXXFLAGS 544 export CFLAGS CXXFLAGS
384} 545}
385 546
386append-ldflags() { 547append-ldflags() {
548 [[ -z $* ]] && return 0
387 export LDFLAGS="${LDFLAGS} $*" 549 export LDFLAGS="${LDFLAGS} $*"
388 return 0 550 return 0
389} 551}
390 552
553# Remove flags from LDFLAGS - it's up to the ebuild to filter
554# CFLAGS and CXXFLAGS via filter-flags if they need to.
391filter-ldflags() { 555filter-ldflags() {
392 local x 556 _filter-var LDFLAGS "$@"
557 return 0
558}
393 559
394 # we do this fancy spacing stuff so as to not filter 560# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
395 # out part of a flag ... we want flag atoms ! :D 561# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
396 LDFLAGS=" ${LDFLAGS} " 562# to gcc where it needs the '-Wl,'.
563raw-ldflags() {
564 local x input="$@"
565 [[ -z ${input} ]] && input=${LDFLAGS}
566 set --
397 for x in "$@" ; do 567 for x in ${input} ; do
398 LDFLAGS="${LDFLAGS// ${x} / }" 568 x=${x#-Wl,}
569 set -- "$@" ${x//,/ }
399 done 570 done
400 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 571 echo "$@"
401 export LDFLAGS
402 return 0
403} 572}
404 573
405etexec-flags() { 574# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
406 # if you're not using a hardened compiler you wont need this 575# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
407 # PIC/no-pic kludge in the first place. 576# fixes.
408 has_hardened || return 0 577#
409 578# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
410 if has_pie || has_pic; then 579gcc2-flags() {
411 [ -z "`is-flag -fno-pic`" ] && 580 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
412 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 581 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
413 [ -z "`is-flag -nopie`" ] && 582 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
414 export CFLAGS="${CFLAGS} `test_flag -nopie`"
415 fi 583 fi
416 return 0
417}
418 584
419fstack-flags() { 585 replace-cpu-flags k6-{2,3} k6
420 if has_ssp; then 586 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
421 [ -z "`is-flag -fno-stack-protector`" ] && 587
422 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 588 replace-cpu-flags pentium-mmx i586
423 fi 589 replace-cpu-flags pentium{2,3,4} i686
424 return 0 590
591 replace-cpu-flags ev6{7,8} ev6
592
593 export CFLAGS CXXFLAGS
425} 594}
595
596# Gets the flags needed for "NOW" binding
597bindnow-flags() {
598 case $($(tc-getLD) -v 2>&1 </dev/null) in
599 *GNU* | *'with BFD'*) # GNU ld
600 echo "-Wl,-z,now" ;;
601 *Apple*) # Darwin ld
602 echo "-bind_at_load" ;;
603 *)
604 # Some linkers just recognize -V instead of -v
605 case $($(tc-getLD) -V 2>&1 </dev/null) in
606 *Solaris*) # Solaris accept almost the same GNU options
607 echo "-Wl,-z,now" ;;
608 esac
609 ;;
610 esac
611}

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