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Revision 1.95 Revision 1.108
1# Copyright 1999-2005 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 1.95 2005/10/13 05:33:34 vapier 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# Maintainer: base-system@gentoo.org
5 6
6# need access to emktemp() 7# need access to emktemp()
7inherit eutils toolchain-funcs multilib 8inherit eutils toolchain-funcs multilib
8 9
9# 10#
19# 20#
20#### replace-cpu-flags <old.cpus> <new.cpu> ### 21#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus> 22# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu> 23# with flags that specify <new.cpu>
23# 24#
24#### is-flag <flag> #### 25#### is-flag[q] <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
26# 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
27# 34#
28#### strip-flags #### 35#### strip-flags ####
29# Strip C[XX]FLAGS of everything except known 36# Strip C[XX]FLAGS of everything except known
30# good options. 37# good options.
31# 38#
49# Add extra flags to your current LDFLAGS 56# Add extra flags to your current LDFLAGS
50# 57#
51#### filter-ldflags <flags> #### 58#### filter-ldflags <flags> ####
52# Remove particular flags from LDFLAGS 59# Remove particular flags from LDFLAGS
53# Matches only complete flags 60# Matches only complete flags
54#
55#### fstack-flags ####
56# hooked function for hardened gcc that appends
57# -fno-stack-protector to {C,CXX,LD}FLAGS
58# when a package is filtering -fstack-protector, -fstack-protector-all
59# notice: modern automatic specs files will also suppress -fstack-protector-all
60# when only -fno-stack-protector is given
61# 61#
62#### bindnow-flags #### 62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker. 63# Returns the flags to enable "now" binding in the current selected linker.
64# 64#
65################ DEPRECATED functions ################ 65################ DEPRECATED functions ################
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 97 export ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
103 fi 104 fi
104 # allow a bunch of flags that negate features / control ABI 105 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 108 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
115 116
116 # 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
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 118 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 119 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 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\[*]}
120} 163}
121 164
122filter-flags() { 165filter-flags() {
123 local x f fset 166 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 167 _filter-var CFLAGS "$@"
125 168 _filter-var CXXFLAGS "$@"
126 for x in "$@" ; do
127 case "${x}" in
128 -fPIC|-fpic|-fPIE|-fpie|-pie)
129 append-flags `test_flag -fno-pie`;;
130 -fstack-protector|-fstack-protector-all)
131 fstack-flags;;
132 esac
133 done
134
135 for fset in CFLAGS CXXFLAGS; do
136 # Looping over the flags instead of using a global
137 # substitution ensures that we're working with flag atoms.
138 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags.
140 for f in ${!fset}; do
141 for x in "$@"; do
142 # Note this should work with globs like -O*
143 [[ ${f} == ${x} ]] && continue 2
144 done
145 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
146 done
147 eval export ${fset}=\${new_${fset}\[*]}
148 done
149
150 return 0 169 return 0
151} 170}
152 171
153filter-lfs-flags() { 172filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 173 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
162 181
163append-flags() { 182append-flags() {
164 [[ -z $* ]] && return 0 183 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 184 export CFLAGS="${CFLAGS} $*"
166 export CXXFLAGS="${CXXFLAGS} $*" 185 export CXXFLAGS="${CXXFLAGS} $*"
167 [ -n "`is-flag -fno-stack-protector`" -o \
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0 186 return 0
170} 187}
171 188
172replace-flags() { 189replace-flags() {
173 [[ $# != 2 ]] \ 190 [[ $# != 2 ]] \
204 shift 221 shift
205 done 222 done
206 return 0 223 return 0
207} 224}
208 225
209is-flag() { 226is-flagq() {
210 local x 227 local x
211 228
212 for x in ${CFLAGS} ${CXXFLAGS} ; do 229 for x in ${CFLAGS} ${CXXFLAGS} ; do
213 # Note this should work with globs like -mcpu=ultrasparc* 230 # Note this should work with globs like -mcpu=ultrasparc*
214 if [[ ${x} == ${1} ]]; then 231 if [[ ${x} == ${1} ]]; then
215 echo true
216 return 0 232 return 0
217 fi 233 fi
218 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 ${1}; then
260 echo true
261 return 0
262 fi
219 return 1 263 return 1
220} 264}
221 265
222filter-mfpmath() { 266filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 267 local orig_mfpmath new_math prune_math
293 export CFLAGS="${NEW_CFLAGS}" 337 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}" 338 export CXXFLAGS="${NEW_CXXFLAGS}"
295 return 0 339 return 0
296} 340}
297 341
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()
298test_flag() { 391test_flag() {
299 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 392 ewarn "test_flag: deprecated, please use test-flags()!" >&2
300 printf "%s\n" "$*" 393
301 return 0 394 test-flags-CC "$@"
302 fi
303 return 1
304} 395}
305 396
306test_version_info() { 397test_version_info() {
307 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 398 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
308 return 0 399 return 0
313 404
314strip-unsupported-flags() { 405strip-unsupported-flags() {
315 local x NEW_CFLAGS NEW_CXXFLAGS 406 local x NEW_CFLAGS NEW_CXXFLAGS
316 407
317 for x in ${CFLAGS} ; do 408 for x in ${CFLAGS} ; do
318 NEW_CFLAGS="${NEW_CFLAGS} $(test_flag ${x})" 409 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
319 done 410 done
320 for x in ${CXXFLAGS} ; do 411 for x in ${CXXFLAGS} ; do
321 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test_flag ${x})" 412 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
322 done 413 done
323 414
324 export CFLAGS=${NEW_CFLAGS} 415 export CFLAGS=${NEW_CFLAGS}
325 export CXXFLAGS=${NEW_CXXFLAGS} 416 export CXXFLAGS=${NEW_CXXFLAGS}
326} 417}
342 return 1 433 return 1
343} 434}
344 435
345# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 436# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
346has_hardened() { 437has_hardened() {
438 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
439
347 test_version_info Hardened && return 0 440 test_version_info Hardened && return 0
348 # the specs file wont exist unless gcc has GCC_SPECS support 441 # The specs file wont exist unless gcc has GCC_SPECS support
349 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 442 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
350 return 0
351 return 1
352} 443}
353 444
354# DEPRECATED - use gcc-specs-pie from toolchain-funcs 445# DEPRECATED - use gcc-specs-pie from toolchain-funcs
355# indicate whether PIC is set 446# indicate whether PIC is set
356has_pic() { 447has_pic() {
357 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 448 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
358 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 449
359 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0 450 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
360 return 1 451 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
452 gcc-specs-pie
361} 453}
362 454
363# DEPRECATED - use gcc-specs-pie from toolchain-funcs 455# DEPRECATED - use gcc-specs-pie from toolchain-funcs
364# indicate whether PIE is set 456# indicate whether PIE is set
365has_pie() { 457has_pie() {
366 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 458 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
367 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 459
368 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0 460 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
369 # test PIC while waiting for specs to be updated to generate __PIE__ 461 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
370 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0 462 gcc-specs-pie
371 return 1
372} 463}
373 464
374# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
375# indicate whether code for SSP is being generated for all functions 466# indicate whether code for SSP is being generated for all functions
376has_ssp_all() { 467has_ssp_all() {
468 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
469
377 # note; this matches only -fstack-protector-all 470 # note; this matches only -fstack-protector-all
378 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0 471 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
379 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0 472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
380 gcc-specs-ssp && return 0 473 gcc-specs-ssp-all
381 return 1
382} 474}
383 475
384# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 476# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
385# indicate whether code for SSP is being generated 477# indicate whether code for SSP is being generated
386has_ssp() { 478has_ssp() {
479 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
480
387 # note; this matches both -fstack-protector and -fstack-protector-all 481 # note; this matches both -fstack-protector and -fstack-protector-all
388 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 482 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
389 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0 483 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
390 gcc-specs-ssp && return 0 484 gcc-specs-ssp
391 return 1
392} 485}
393 486
394has_m64() { 487has_m64() {
395 # this doesnt test if the flag is accepted, it tests if the flag 488 # this doesnt test if the flag is accepted, it tests if the flag
396 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 489 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
397 # please dont replace this function with test_flag in some future 490 # please dont replace this function with test_flag in some future
398 # clean-up! 491 # clean-up!
492
399 local temp="$(emktemp)" 493 local temp="$(emktemp)"
400 echo "int main() { return(0); }" > ${temp}.c 494 echo "int main() { return(0); }" > "${temp}".c
401 MY_CC=$(tc-getCC) 495 MY_CC=$(tc-getCC)
402 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 496 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
403 local ret=$? 497 local ret=$?
404 rm -f ${temp}.c 498 rm -f "${temp}".c
405 [ "$ret" != "1" ] && return 0 499 [[ ${ret} != 1 ]] && return 0
406 return 1 500 return 1
407} 501}
408 502
409has_m32() { 503has_m32() {
410 # this doesnt test if the flag is accepted, it tests if the flag 504 # this doesnt test if the flag is accepted, it tests if the flag
418 echo "int main() { return(0); }" > "${temp}".c 512 echo "int main() { return(0); }" > "${temp}".c
419 MY_CC=$(tc-getCC) 513 MY_CC=$(tc-getCC)
420 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 514 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
421 local ret=$? 515 local ret=$?
422 rm -f "${temp}".c 516 rm -f "${temp}".c
423 [ "$ret" != "1" ] && return 0 517 [[ ${ret} != 1 ]] && return 0
424 return 1 518 return 1
425} 519}
426 520
427replace-sparc64-flags() { 521replace-sparc64-flags() {
428 local SPARC64_CPUS="ultrasparc v9" 522 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
429 523
430 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 524 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
431 for x in ${SPARC64_CPUS}; do 525 for x in ${SPARC64_CPUS}; do
432 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 526 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
433 done 527 done
449 543
450 export CFLAGS CXXFLAGS 544 export CFLAGS CXXFLAGS
451} 545}
452 546
453append-ldflags() { 547append-ldflags() {
548 [[ -z $* ]] && return 0
454 export LDFLAGS="${LDFLAGS} $*" 549 export LDFLAGS="${LDFLAGS} $*"
455 return 0 550 return 0
456} 551}
457 552
553# Remove flags from LDFLAGS - it's up to the ebuild to filter
554# CFLAGS and CXXFLAGS via filter-flags if they need to.
458filter-ldflags() { 555filter-ldflags() {
459 local x 556 _filter-var LDFLAGS "$@"
557 return 0
558}
460 559
461 # we do this fancy spacing stuff so as to not filter 560# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
462 # out part of a flag ... we want flag atoms ! :D 561# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
463 LDFLAGS=" ${LDFLAGS} " 562# to gcc where it needs the '-Wl,'.
563raw-ldflags() {
564 local x input="$@"
565 [[ -z ${input} ]] && input=${LDFLAGS}
566 set --
464 for x in "$@" ; do 567 for x in ${input} ; do
465 LDFLAGS=${LDFLAGS// ${x} / } 568 x=${x#-Wl,}
569 set -- "$@" ${x//,/ }
466 done 570 done
467 [[ -z ${LDFLAGS// } ]] \ 571 echo "$@"
468 && LDFLAGS="" \
469 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
470 export LDFLAGS
471 return 0
472}
473
474fstack-flags() {
475 if gcc-specs-ssp; then
476 [ -z "`is-flag -fno-stack-protector`" ] &&
477 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
478 fi
479 return 0
480} 572}
481 573
482# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 574# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
483# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 575# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
484# fixes. 576# fixes.

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