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Revision 1.86 - (hide annotations) (download)
Thu Apr 28 20:06:00 2005 UTC (9 years, 4 months ago) by solar
Branch: MAIN
Changes since 1.85: +21 -2 lines
- update has_pic to not test for pie. add has_ssp_all and comments. Kevin F. Quinn

1 vapier 1.84 # Copyright 1999-2005 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 solar 1.86 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.85 2005/04/06 23:29:23 vapier Exp $
4 azarah 1.8
5 verwilst 1.1 ECLASS=flag-o-matic
6 danarmak 1.6 INHERITED="$INHERITED $ECLASS"
7 vapier 1.63
8 vapier 1.75 IUSE="debug"
9 azarah 1.8
10 vapier 1.72 # need access to emktemp()
11 eradicator 1.80 inherit eutils toolchain-funcs multilib
12 vapier 1.72
13 verwilst 1.2 #
14 vapier 1.18 #### filter-flags <flags> ####
15 verwilst 1.3 # Remove particular flags from C[XX]FLAGS
16 vapier 1.18 # Matches only complete flags
17 verwilst 1.2 #
18 vapier 1.18 #### append-flags <flags> ####
19 verwilst 1.3 # Add extra flags to your current C[XX]FLAGS
20     #
21 verwilst 1.4 #### replace-flags <orig.flag> <new.flag> ###
22 verwilst 1.3 # Replace a flag by another one
23     #
24 vapier 1.70 #### replace-cpu-flags <old.cpus> <new.cpu> ###
25 vapier 1.37 # Replace march/mcpu flags that specify <old.cpus>
26     # with flags that specify <new.cpu>
27     #
28 danarmak 1.7 #### is-flag <flag> ####
29     # Returns "true" if flag is set in C[XX]FLAGS
30 vapier 1.18 # Matches only complete a flag
31 danarmak 1.7 #
32 azarah 1.8 #### strip-flags ####
33     # Strip C[XX]FLAGS of everything except known
34     # good options.
35     #
36 puggy 1.29 #### strip-unsupported-flags ####
37     # Strip C[XX]FLAGS of any flags not supported by
38     # installed version of gcc
39     #
40 vapier 1.10 #### get-flag <flag> ####
41     # Find and echo the value for a particular flag
42     #
43 joker 1.16 #### replace-sparc64-flags ####
44     # Sets mcpu to v8 and uses the original value
45     # as mtune if none specified.
46     #
47 vapier 1.26 #### filter-mfpmath <math types> ####
48     # Remove specified math types from the fpmath specification
49     # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
50     # will leave the user with -mfpmath=386
51 solar 1.27 #
52     #### append-ldflags ####
53     # Add extra flags to your current LDFLAGS
54     #
55 solar 1.41 #### filter-ldflags <flags> ####
56     # Remove particular flags from LDFLAGS
57     # Matches only complete flags
58     #
59 solar 1.27 #### fstack-flags ####
60 pappy 1.50 # hooked function for hardened gcc that appends
61     # -fno-stack-protector to {C,CXX,LD}FLAGS
62     # when a package is filtering -fstack-protector, -fstack-protector-all
63     # notice: modern automatic specs files will also suppress -fstack-protector-all
64     # when only -fno-stack-protector is given
65 solar 1.27 #
66 solar 1.86 #### has_pic ####
67     # Returns true if the compiler by default or with current CFLAGS
68     # builds position-independent code.
69     #
70     #### has_ssp_all ####
71     # Returns true if the compiler by default or with current CFLAGS
72     # generates stack smash protections for all functions
73     #
74     #### has_ssp ####
75     # Returns true if the compiler by default or with current CFLAGS
76     # generates stack smash protections for most vulnerable functions
77     #
78 verwilst 1.3
79 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
80 vapier 1.36 setup-allowed-flags() {
81 vapier 1.84 if [[ -z ${ALLOWED_FLAGS} ]] ; then
82 vapier 1.76 export ALLOWED_FLAGS="-pipe"
83     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
84     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
85     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
86     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
87 vapier 1.84 case $(tc-arch) in
88 robbat2 1.71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
89 lv 1.51 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
90     x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
91 vapier 1.44 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
92 vapier 1.65 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
93 vapier 1.84 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
94 chriswhite 1.79 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;;
95 vapier 1.44 esac
96     fi
97 vapier 1.65 # allow a bunch of flags that negate features / control ABI
98     ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
99 vapier 1.84 case $(tc-arch) in
100 vapier 1.65 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
101     esac
102     ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
103 vapier 1.36
104     # C[XX]FLAGS that we are think is ok, but needs testing
105     # NOTE: currently -Os have issues with gcc3 and K6* arch's
106     export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
107     return 0
108 aliz 1.24 }
109 verwilst 1.13
110 vapier 1.18 filter-flags() {
111 mr_bones_ 1.83 local x f fset
112 agriffis 1.61 declare -a new_CFLAGS new_CXXFLAGS
113 agriffis 1.58
114 vapier 1.36 for x in "$@" ; do
115 solar 1.27 case "${x}" in
116 solar 1.82 -fPIC|-fpic|-fPIE|-fpie|-pie)
117     append-flags `test_flag -fno-pie`;;
118     -fstack-protector|-fstack-protector-all)
119     fstack-flags;;
120 solar 1.27 esac
121     done
122 vapier 1.36
123 agriffis 1.61 for fset in CFLAGS CXXFLAGS; do
124 agriffis 1.64 # Looping over the flags instead of using a global
125     # substitution ensures that we're working with flag atoms.
126     # Otherwise globs like -O* have the potential to wipe out the
127     # list of flags.
128 agriffis 1.61 for f in ${!fset}; do
129     for x in "$@"; do
130     # Note this should work with globs like -O*
131     [[ ${f} == ${x} ]] && continue 2
132     done
133     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
134     done
135     eval export ${fset}=\${new_${fset}\[*]}
136 verwilst 1.1 done
137 agriffis 1.61
138 vapier 1.36 return 0
139 verwilst 1.2 }
140    
141 vapier 1.40 filter-lfs-flags() {
142     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
143     }
144    
145 vapier 1.48 append-lfs-flags() {
146     append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
147     }
148    
149 vapier 1.18 append-flags() {
150 solar 1.82 [[ -z $* ]] && return 0
151 agriffis 1.58 export CFLAGS="${CFLAGS} $*"
152     export CXXFLAGS="${CXXFLAGS} $*"
153     [ -n "`is-flag -fno-stack-protector`" -o \
154     -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
155 vapier 1.28 return 0
156 verwilst 1.1 }
157    
158 vapier 1.18 replace-flags() {
159 mr_bones_ 1.83 local f fset
160 agriffis 1.64 declare -a new_CFLAGS new_CXXFLAGS
161    
162     for fset in CFLAGS CXXFLAGS; do
163     # Looping over the flags instead of using a global
164     # substitution ensures that we're working with flag atoms.
165     # Otherwise globs like -O* have the potential to wipe out the
166     # list of flags.
167     for f in ${!fset}; do
168     # Note this should work with globs like -O*
169     [[ ${f} == ${1} ]] && f=${2}
170     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
171     done
172     eval export ${fset}=\${new_${fset}\[*]}
173     done
174    
175 vapier 1.28 return 0
176 danarmak 1.7 }
177    
178 vapier 1.37 replace-cpu-flags() {
179 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
180     while [ $# -gt 1 ] ; do
181 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
182     # ${oldcpu} prior to calling replace-flags
183 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
184     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
185     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
186     shift
187 vapier 1.37 done
188     return 0
189     }
190    
191 danarmak 1.7 is-flag() {
192 agriffis 1.58 local x
193    
194 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
195 agriffis 1.67 # Note this should work with globs like -mcpu=ultrasparc*
196     if [[ ${x} == ${1} ]]; then
197 azarah 1.8 echo true
198 vapier 1.18 return 0
199     fi
200 danarmak 1.7 done
201 vapier 1.18 return 1
202 verwilst 1.1 }
203 azarah 1.8
204 vapier 1.36 filter-mfpmath() {
205 agriffis 1.58 local orig_mfpmath new_math prune_math
206    
207 vapier 1.36 # save the original -mfpmath flag
208 agriffis 1.58 orig_mfpmath="`get-flag -mfpmath`"
209 vapier 1.36 # get the value of the current -mfpmath flag
210 agriffis 1.58 new_math=" `get-flag mfpmath | tr , ' '` "
211 vapier 1.36 # figure out which math values are to be removed
212 agriffis 1.58 prune_math=""
213 vapier 1.36 for prune_math in "$@" ; do
214     new_math="${new_math/ ${prune_math} / }"
215     done
216     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
217    
218     if [ -z "${new_math}" ] ; then
219     # if we're removing all user specified math values are
220     # slated for removal, then we just filter the flag
221     filter-flags ${orig_mfpmath}
222     else
223     # if we only want to filter some of the user specified
224     # math values, then we replace the current flag
225     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
226     fi
227     return 0
228     }
229    
230 azarah 1.8 strip-flags() {
231 agriffis 1.58 local x y flag NEW_CFLAGS NEW_CXXFLAGS
232    
233 vapier 1.36 setup-allowed-flags
234    
235 azarah 1.8 local NEW_CFLAGS=""
236     local NEW_CXXFLAGS=""
237    
238 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
239 vapier 1.84 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
240 vapier 1.49 use debug && einfo "Enabling the use of some unstable flags"
241 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
242     fi
243    
244 agriffis 1.58 set -f # disable pathname expansion
245 azarah 1.8
246 agriffis 1.58 for x in ${CFLAGS}; do
247     for y in ${ALLOWED_FLAGS}; do
248 lostlogic 1.14 flag=${x%%=*}
249 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
250 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
251     break
252 azarah 1.8 fi
253     done
254     done
255    
256 agriffis 1.58 for x in ${CXXFLAGS}; do
257     for y in ${ALLOWED_FLAGS}; do
258 lostlogic 1.14 flag=${x%%=*}
259 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
260 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
261     break
262 azarah 1.8 fi
263     done
264     done
265 azarah 1.30
266     # In case we filtered out all optimization flags fallback to -O2
267     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
268     NEW_CFLAGS="${NEW_CFLAGS} -O2"
269     fi
270     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
271     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
272     fi
273 azarah 1.8
274 agriffis 1.58 set +f # re-enable pathname expansion
275 azarah 1.8
276     export CFLAGS="${NEW_CFLAGS}"
277     export CXXFLAGS="${NEW_CXXFLAGS}"
278 vapier 1.36 return 0
279 puggy 1.29 }
280    
281 vapier 1.36 test_flag() {
282 vapier 1.75 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
283 agriffis 1.58 printf "%s\n" "$*"
284 vapier 1.36 return 0
285 puggy 1.29 fi
286 vapier 1.36 return 1
287 puggy 1.29 }
288    
289 agriffis 1.58 test_version_info() {
290 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
291 agriffis 1.58 return 0
292     else
293     return 1
294     fi
295     }
296    
297 puggy 1.29 strip-unsupported-flags() {
298 agriffis 1.58 local NEW_CFLAGS NEW_CXXFLAGS
299    
300 vapier 1.36 for x in ${CFLAGS} ; do
301 agriffis 1.58 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
302 puggy 1.29 done
303 vapier 1.36 for x in ${CXXFLAGS} ; do
304 agriffis 1.58 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
305 puggy 1.29 done
306    
307 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
308     export CXXFLAGS="${NEW_CXXFLAGS}"
309 azarah 1.8 }
310    
311 vapier 1.10 get-flag() {
312 agriffis 1.58 local f findflag="$1"
313    
314 vapier 1.36 # this code looks a little flaky but seems to work for
315     # everything we want ...
316     # for example, if CFLAGS="-march=i686":
317 agriffis 1.58 # `get-flag -march` == "-march=i686"
318     # `get-flag march` == "i686"
319 vapier 1.10 for f in ${CFLAGS} ${CXXFLAGS} ; do
320     if [ "${f/${findflag}}" != "${f}" ] ; then
321 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
322 vapier 1.28 return 0
323 vapier 1.10 fi
324     done
325 vapier 1.28 return 1
326 joker 1.16 }
327    
328 solar 1.53 has_hardened() {
329 lv 1.69 test_version_info Hardened && return 0
330     # the specs file wont exist unless gcc has GCC_SPECS support
331     [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
332     return 0
333     return 1
334 solar 1.53 }
335    
336 solar 1.81 # indicate whether PIC is set
337 tseng 1.42 has_pic() {
338     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
339     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
340 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
341 tseng 1.42 return 1
342     }
343    
344 solar 1.81 # indicate whether PIE is set
345 mr_bones_ 1.83 has_pie() {
346 tseng 1.43 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
347     [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
348 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
349     # test PIC while waiting for specs to be updated to generate __PIE__
350     [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
351 tseng 1.42 return 1
352     }
353 mr_bones_ 1.83
354 solar 1.86 # indicate whether code for SSP is being generated for all functions
355     has_ssp_all() {
356     # note; this matches only -fstack-protector-all
357     [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
358     [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
359     return 1
360     }
361    
362 solar 1.81 # indicate whether code for SSP is being generated
363 tseng 1.42 has_ssp() {
364 solar 1.81 # note; this matches both -fstack-protector and -fstack-protector-all
365 tseng 1.42 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
366 solar 1.81 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
367 tseng 1.42 return 1
368     }
369    
370 lv 1.56 has_m64() {
371 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
372     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
373     # please dont replace this function with test_flag in some future
374     # clean-up!
375 vapier 1.72 local temp="$(emktemp)"
376 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
377 kugelfang 1.74 MY_CC=$(tc-getCC)
378     ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
379 vapier 1.72 local ret=$?
380 lv 1.62 rm -f ${temp}.c
381     [ "$ret" != "1" ] && return 0
382     return 1
383 lv 1.56 }
384    
385     has_m32() {
386 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
387     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
388     # please dont replace this function with test_flag in some future
389     # clean-up!
390 eradicator 1.80
391     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
392    
393 vapier 1.72 local temp="$(emktemp)"
394 lv 1.62 echo "int main() { return(0); }" > ${temp}.c
395 kugelfang 1.74 MY_CC=$(tc-getCC)
396     ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
397 vapier 1.72 local ret=$?
398 lv 1.62 rm -f ${temp}.c
399     [ "$ret" != "1" ] && return 0
400     return 1
401 lv 1.56 }
402    
403 vapier 1.18 replace-sparc64-flags() {
404 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
405    
406 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
407 agriffis 1.58 for x in ${SPARC64_CPUS}; do
408 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
409     done
410 mr_bones_ 1.83 else
411 agriffis 1.58 for x in ${SPARC64_CPUS}; do
412 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
413     done
414     fi
415 mr_bones_ 1.83
416     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
417 agriffis 1.58 for x in ${SPARC64_CPUS}; do
418 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
419     done
420     else
421 agriffis 1.58 for x in ${SPARC64_CPUS}; do
422 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
423     done
424     fi
425 vapier 1.59
426     export CFLAGS CXXFLAGS
427 solar 1.27 }
428    
429     append-ldflags() {
430 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
431 vapier 1.28 return 0
432 solar 1.27 }
433    
434 solar 1.41 filter-ldflags() {
435 agriffis 1.58 local x
436    
437 solar 1.41 # we do this fancy spacing stuff so as to not filter
438     # out part of a flag ... we want flag atoms ! :D
439     LDFLAGS=" ${LDFLAGS} "
440     for x in "$@" ; do
441 vapier 1.84 LDFLAGS=${LDFLAGS// ${x} / }
442 solar 1.41 done
443 vapier 1.84 [[ -z ${LDFLAGS// } ]] \
444     && LDFLAGS="" \
445     || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
446 vapier 1.59 export LDFLAGS
447 solar 1.41 return 0
448     }
449    
450 solar 1.27 fstack-flags() {
451 agriffis 1.58 if has_ssp; then
452 mr_bones_ 1.83 [ -z "`is-flag -fno-stack-protector`" ] &&
453 agriffis 1.58 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
454 solar 1.35 fi
455 agriffis 1.58 return 0
456 vapier 1.10 }
457 vapier 1.73
458     # This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
459     # bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
460     # fixes.
461     #
462     # Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
463     gcc2-flags() {
464 vapier 1.85 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
465     CFLAGS=${CFLAGS//-mtune=/-mcpu=}
466     CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
467 vapier 1.73 fi
468    
469 vapier 1.85 replace-cpu-flags k6-{2,3} k6
470     replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
471    
472     replace-cpu-flags pentium-mmx i586
473     replace-cpu-flags pentium{2,3,4} i686
474    
475     replace-cpu-flags ev6{7,8} ev6
476    
477 vapier 1.73 export CFLAGS CXXFLAGS
478     }

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