Merge "vp9_find_mv_refs_idx: remove unused split_count"
[aom.git] / configure
blobbc6439db7bc0bd6cdedde9e417406a4f22a2836f
1 #!/bin/bash
2 ##
3 ## configure
4 ##
5 ## This script is the front-end to the build system. It provides a similar
6 ## interface to standard configure scripts with some extra bits for dealing
7 ## with toolchains that differ from the standard POSIX interface and
8 ## for extracting subsets of the source tree. In theory, reusable parts
9 ## of this script were intended to live in build/make/configure.sh,
10 ## but in practice, the line is pretty blurry.
12 ## This build system is based in part on the FFmpeg configure script.
15 #source_path="`dirname \"$0\"`"
16 source_path=${0%/*}
17 . "${source_path}/build/make/configure.sh"
19 show_help(){
20 show_help_pre
21 cat << EOF
22 Advanced options:
23 ${toggle_libs} libraries
24 ${toggle_examples} examples
25 ${toggle_docs} documentation
26 ${toggle_unit_tests} unit tests
27 --libc=PATH path to alternate libc
28 --as={yasm|nasm|auto} use specified assembler [auto, yasm preferred]
29 --sdk-path=PATH path to root of sdk (iOS, android builds only)
30 ${toggle_fast_unaligned} don't use unaligned accesses, even when
31 supported by hardware [auto]
32 ${toggle_codec_srcs} in/exclude codec library source code
33 ${toggle_debug_libs} in/exclude debug version of libraries
34 ${toggle_md5} support for output of checksum data
35 ${toggle_static_msvcrt} use static MSVCRT (VS builds only)
36 ${toggle_vp8} VP8 codec support
37 ${toggle_vp9} VP9 codec support
38 ${toggle_internal_stats} output of encoder internal stats for debug, if supported (encoders)
39 ${toggle_mem_tracker} track memory usage
40 ${toggle_postproc} postprocessing
41 ${toggle_multithread} multithreaded encoding and decoding
42 ${toggle_spatial_resampling} spatial sampling (scaling) support
43 ${toggle_realtime_only} enable this option while building for real-time encoding
44 ${toggle_onthefly_bitpacking} enable on-the-fly bitpacking in real-time encoding
45 ${toggle_error_concealment} enable this option to get a decoder which is able to conceal losses
46 ${toggle_runtime_cpu_detect} runtime cpu detection
47 ${toggle_shared} shared library support
48 ${toggle_static} static library support
49 ${toggle_small} favor smaller size over speed
50 ${toggle_postproc_visualizer} macro block / block level visualizers
51 ${toggle_multi_res_encoding} enable multiple-resolution encoding
52 ${toggle_temporal_denoising} enable temporal denoising and disable the spatial denoiser
54 Codecs:
55 Codecs can be selectively enabled or disabled individually, or by family:
56 --disable-<codec>
57 is equivalent to:
58 --disable-<codec>-encoder
59 --disable-<codec>-decoder
61 Codecs available in this distribution:
62 EOF
63 #restore editor state '
65 local family;
66 local last_family;
67 local c;
68 local str;
69 for c in ${CODECS}; do
70 family=${c%_*}
71 if [ "${family}" != "${last_family}" ]; then
72 [ -z "${str}" ] || echo "${str}"
73 str="$(printf ' %10s:' ${family})"
75 str="${str} $(printf '%10s' ${c#*_})"
76 last_family=${family}
77 done
78 echo "${str}"
79 show_help_post
83 ## BEGIN APPLICATION SPECIFIC CONFIGURATION
86 # all_platforms is a list of all supported target platforms. Maintain
87 # alphabetically by architecture, generic-gnu last.
88 all_platforms="${all_platforms} armv5te-android-gcc"
89 all_platforms="${all_platforms} armv5te-linux-rvct"
90 all_platforms="${all_platforms} armv5te-linux-gcc"
91 all_platforms="${all_platforms} armv5te-none-rvct"
92 all_platforms="${all_platforms} armv6-darwin-gcc"
93 all_platforms="${all_platforms} armv6-linux-rvct"
94 all_platforms="${all_platforms} armv6-linux-gcc"
95 all_platforms="${all_platforms} armv6-none-rvct"
96 all_platforms="${all_platforms} armv7-android-gcc" #neon Cortex-A8
97 all_platforms="${all_platforms} armv7-darwin-gcc" #neon Cortex-A8
98 all_platforms="${all_platforms} armv7-linux-rvct" #neon Cortex-A8
99 all_platforms="${all_platforms} armv7-linux-gcc" #neon Cortex-A8
100 all_platforms="${all_platforms} armv7-none-rvct" #neon Cortex-A8
101 all_platforms="${all_platforms} armv7-win32-vs11"
102 all_platforms="${all_platforms} mips32-linux-gcc"
103 all_platforms="${all_platforms} ppc32-darwin8-gcc"
104 all_platforms="${all_platforms} ppc32-darwin9-gcc"
105 all_platforms="${all_platforms} ppc32-linux-gcc"
106 all_platforms="${all_platforms} ppc64-darwin8-gcc"
107 all_platforms="${all_platforms} ppc64-darwin9-gcc"
108 all_platforms="${all_platforms} ppc64-linux-gcc"
109 all_platforms="${all_platforms} sparc-solaris-gcc"
110 all_platforms="${all_platforms} x86-android-gcc"
111 all_platforms="${all_platforms} x86-darwin8-gcc"
112 all_platforms="${all_platforms} x86-darwin8-icc"
113 all_platforms="${all_platforms} x86-darwin9-gcc"
114 all_platforms="${all_platforms} x86-darwin9-icc"
115 all_platforms="${all_platforms} x86-darwin10-gcc"
116 all_platforms="${all_platforms} x86-darwin11-gcc"
117 all_platforms="${all_platforms} x86-darwin12-gcc"
118 all_platforms="${all_platforms} x86-darwin13-gcc"
119 all_platforms="${all_platforms} x86-linux-gcc"
120 all_platforms="${all_platforms} x86-linux-icc"
121 all_platforms="${all_platforms} x86-os2-gcc"
122 all_platforms="${all_platforms} x86-solaris-gcc"
123 all_platforms="${all_platforms} x86-win32-gcc"
124 all_platforms="${all_platforms} x86-win32-vs7"
125 all_platforms="${all_platforms} x86-win32-vs8"
126 all_platforms="${all_platforms} x86-win32-vs9"
127 all_platforms="${all_platforms} x86-win32-vs10"
128 all_platforms="${all_platforms} x86-win32-vs11"
129 all_platforms="${all_platforms} x86_64-darwin9-gcc"
130 all_platforms="${all_platforms} x86_64-darwin10-gcc"
131 all_platforms="${all_platforms} x86_64-darwin11-gcc"
132 all_platforms="${all_platforms} x86_64-darwin12-gcc"
133 all_platforms="${all_platforms} x86_64-darwin13-gcc"
134 all_platforms="${all_platforms} x86_64-linux-gcc"
135 all_platforms="${all_platforms} x86_64-linux-icc"
136 all_platforms="${all_platforms} x86_64-solaris-gcc"
137 all_platforms="${all_platforms} x86_64-win64-gcc"
138 all_platforms="${all_platforms} x86_64-win64-vs8"
139 all_platforms="${all_platforms} x86_64-win64-vs9"
140 all_platforms="${all_platforms} x86_64-win64-vs10"
141 all_platforms="${all_platforms} x86_64-win64-vs11"
142 all_platforms="${all_platforms} universal-darwin8-gcc"
143 all_platforms="${all_platforms} universal-darwin9-gcc"
144 all_platforms="${all_platforms} universal-darwin10-gcc"
145 all_platforms="${all_platforms} universal-darwin11-gcc"
146 all_platforms="${all_platforms} universal-darwin12-gcc"
147 all_platforms="${all_platforms} universal-darwin13-gcc"
148 all_platforms="${all_platforms} generic-gnu"
150 # all_targets is a list of all targets that can be configured
151 # note that these should be in dependency order for now.
152 all_targets="libs examples docs"
154 # all targets available are enabled, by default.
155 for t in ${all_targets}; do
156 [ -f ${source_path}/${t}.mk ] && enable ${t}
157 done
159 # check installed doxygen version
160 doxy_version=$(doxygen --version 2>/dev/null)
161 doxy_major=${doxy_version%%.*}
162 if [ ${doxy_major:-0} -ge 1 ]; then
163 doxy_version=${doxy_version#*.}
164 doxy_minor=${doxy_version%%.*}
165 doxy_patch=${doxy_version##*.}
167 [ $doxy_major -gt 1 ] && enable doxygen
168 [ $doxy_minor -gt 5 ] && enable doxygen
169 [ $doxy_minor -eq 5 ] && [ $doxy_patch -ge 3 ] && enable doxygen
172 # install everything except the sources, by default. sources will have
173 # to be enabled when doing dist builds, since that's no longer a common
174 # case.
175 enabled doxygen && php -v >/dev/null 2>&1 && enable install_docs
176 enable install_bins
177 enable install_libs
179 enable static
180 enable optimizations
181 enable fast_unaligned #allow unaligned accesses, if supported by hw
182 enable md5
183 enable spatial_resampling
184 enable multithread
185 enable os_support
186 enable temporal_denoising
188 [ -d ${source_path}/../include ] && enable alt_tree_layout
189 for d in vp8 vp9; do
190 [ -d ${source_path}/${d} ] && disable alt_tree_layout;
191 done
193 if ! enabled alt_tree_layout; then
194 # development environment
195 [ -d ${source_path}/vp8 ] && CODECS="${CODECS} vp8_encoder vp8_decoder"
196 [ -d ${source_path}/vp9 ] && CODECS="${CODECS} vp9_encoder vp9_decoder"
197 else
198 # customer environment
199 [ -f ${source_path}/../include/vpx/vp8cx.h ] && CODECS="${CODECS} vp8_encoder"
200 [ -f ${source_path}/../include/vpx/vp8dx.h ] && CODECS="${CODECS} vp8_decoder"
201 [ -f ${source_path}/../include/vpx/vp9cx.h ] && CODECS="${CODECS} vp9_encoder"
202 [ -f ${source_path}/../include/vpx/vp9dx.h ] && CODECS="${CODECS} vp9_decoder"
203 [ -f ${source_path}/../include/vpx/vp8cx.h ] || disable vp8_encoder
204 [ -f ${source_path}/../include/vpx/vp8dx.h ] || disable vp8_decoder
205 [ -f ${source_path}/../include/vpx/vp9cx.h ] || disable vp9_encoder
206 [ -f ${source_path}/../include/vpx/vp9dx.h ] || disable vp9_decoder
208 [ -f ${source_path}/../lib/*/*mt.lib ] && soft_enable static_msvcrt
211 CODECS="$(echo ${CODECS} | tr ' ' '\n')"
212 CODEC_FAMILIES="$(for c in ${CODECS}; do echo ${c%_*}; done | sort | uniq)"
214 ARCH_LIST="
216 mips
218 x86_64
219 ppc32
220 ppc64
222 ARCH_EXT_LIST="
223 edsp
224 media
225 neon
227 mips32
228 dspr2
232 sse2
233 sse3
234 ssse3
235 sse4_1
237 altivec
239 HAVE_LIST="
240 ${ARCH_EXT_LIST}
241 vpx_ports
242 stdint_h
243 alt_tree_layout
244 pthread_h
245 sys_mman_h
246 unistd_h
248 EXPERIMENT_LIST="
249 oneshotq
250 multiple_arf
251 non420
252 alpha
253 balanced_coeftree
255 CONFIG_LIST="
256 external_build
257 install_docs
258 install_bins
259 install_libs
260 install_srcs
261 debug
262 gprof
263 gcov
264 rvct
266 msvs
268 big_endian
270 codec_srcs
271 debug_libs
272 fast_unaligned
273 mem_manager
274 mem_tracker
275 mem_checks
278 dequant_tokens
279 dc_recon
280 runtime_cpu_detect
281 postproc
282 multithread
283 internal_stats
284 ${CODECS}
285 ${CODEC_FAMILIES}
286 encoders
287 decoders
288 static_msvcrt
289 spatial_resampling
290 realtime_only
291 onthefly_bitpacking
292 error_concealment
293 shared
294 static
295 small
296 postproc_visualizer
297 os_support
298 unit_tests
299 multi_res_encoding
300 temporal_denoising
301 experimental
302 decrypt
303 ${EXPERIMENT_LIST}
305 CMDLINE_SELECT="
306 external_build
307 extra_warnings
308 werror
309 install_docs
310 install_bins
311 install_libs
312 install_srcs
313 debug
314 gprof
315 gcov
317 optimizations
318 ccache
319 runtime_cpu_detect
320 thumb
322 libs
323 examples
324 docs
325 libc
327 fast_unaligned
328 codec_srcs
329 debug_libs
332 dequant_tokens
333 dc_recon
334 postproc
335 multithread
336 internal_stats
337 ${CODECS}
338 ${CODEC_FAMILIES}
339 static_msvcrt
340 mem_tracker
341 spatial_resampling
342 realtime_only
343 onthefly_bitpacking
344 error_concealment
345 shared
346 static
347 small
348 postproc_visualizer
349 unit_tests
350 multi_res_encoding
351 temporal_denoising
352 experimental
353 decrypt
356 process_cmdline() {
357 for opt do
358 optval="${opt#*=}"
359 case "$opt" in
360 --disable-codecs) for c in ${CODECS}; do disable $c; done ;;
361 --enable-?*|--disable-?*)
362 eval `echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g'`
363 if echo "${EXPERIMENT_LIST}" | grep "^ *$option\$" >/dev/null; then
364 if enabled experimental; then
365 $action $option
366 else
367 log_echo "Ignoring $opt -- not in experimental mode."
369 else
370 process_common_cmdline $opt
373 *) process_common_cmdline "$opt"
375 esac
376 done
379 post_process_cmdline() {
380 local c
382 # If the codec family is disabled, disable all components of that family.
383 # If the codec family is enabled, enable all components of that family.
384 log_echo "Configuring selected codecs"
385 for c in ${CODECS}; do
386 disabled ${c%%_*} && disable ${c}
387 enabled ${c%%_*} && enable ${c}
388 done
390 # Enable all detected codecs, if they haven't been disabled
391 for c in ${CODECS}; do soft_enable $c; done
393 # Enable the codec family if any component of that family is enabled
394 for c in ${CODECS}; do
395 enabled $c && enable ${c%_*}
396 done
398 # Set the {en,de}coders variable if any algorithm in that class is enabled
399 for c in ${CODECS}; do
400 enabled ${c} && enable ${c##*_}s
401 done
405 process_targets() {
406 enabled child || write_common_config_banner
407 enabled universal || write_common_target_config_h ${BUILD_PFX}vpx_config.h
409 # TODO: add host tools target (obj_int_extract, etc)
411 # For fat binaries, call configure recursively to configure for each
412 # binary architecture to be included.
413 if enabled universal; then
414 # Call configure (ourselves) for each subarchitecture
415 for arch in $fat_bin_archs; do
416 BUILD_PFX=${arch}/ toolchain=${arch} $self --child $cmdline_args || exit $?
417 done
420 # The write_common_config (config.mk) logic is deferred until after the
421 # recursive calls to configure complete, becuase we want our universal
422 # targets to be executed last.
423 write_common_config_targets
424 enabled universal && echo "FAT_ARCHS=${fat_bin_archs}" >> config.mk
426 # Calculate the default distribution name, based on the enabled features
427 local cf
428 local DIST_DIR=vpx
429 for cf in $CODEC_FAMILIES; do
430 if enabled ${cf}_encoder && enabled ${cf}_decoder; then
431 DIST_DIR="${DIST_DIR}-${cf}"
432 elif enabled ${cf}_encoder; then
433 DIST_DIR="${DIST_DIR}-${cf}cx"
434 elif enabled ${cf}_decoder; then
435 DIST_DIR="${DIST_DIR}-${cf}dx"
437 done
438 enabled debug_libs && DIST_DIR="${DIST_DIR}-debug"
439 enabled codec_srcs && DIST_DIR="${DIST_DIR}-src"
440 ! enabled postproc && DIST_DIR="${DIST_DIR}-nopost"
441 ! enabled multithread && DIST_DIR="${DIST_DIR}-nomt"
442 ! enabled install_docs && DIST_DIR="${DIST_DIR}-nodocs"
443 DIST_DIR="${DIST_DIR}-${tgt_isa}-${tgt_os}"
444 case "${tgt_os}" in
445 win*) enabled static_msvcrt && DIST_DIR="${DIST_DIR}mt" || DIST_DIR="${DIST_DIR}md"
446 DIST_DIR="${DIST_DIR}-${tgt_cc}"
448 esac
449 if [ -f "${source_path}/build/make/version.sh" ]; then
450 local ver=`"$source_path/build/make/version.sh" --bare $source_path`
451 DIST_DIR="${DIST_DIR}-${ver}"
452 VERSION_STRING=${ver}
453 ver=${ver%%-*}
454 VERSION_PATCH=${ver##*.}
455 ver=${ver%.*}
456 VERSION_MINOR=${ver##*.}
457 ver=${ver#v}
458 VERSION_MAJOR=${ver%.*}
460 enabled child || cat <<EOF >> config.mk
462 PREFIX=${prefix}
463 ifeq (\$(MAKECMDGOALS),dist)
464 DIST_DIR?=${DIST_DIR}
465 else
466 DIST_DIR?=\$(DESTDIR)${prefix}
467 endif
468 LIBSUBDIR=${libdir##${prefix}/}
470 VERSION_STRING=${VERSION_STRING}
472 VERSION_MAJOR=${VERSION_MAJOR}
473 VERSION_MINOR=${VERSION_MINOR}
474 VERSION_PATCH=${VERSION_PATCH}
476 CONFIGURE_ARGS=${CONFIGURE_ARGS}
478 enabled child || echo "CONFIGURE_ARGS?=${CONFIGURE_ARGS}" >> config.mk
481 # Write makefiles for all enabled targets
483 for tgt in libs examples docs solution; do
484 local tgt_fn="$tgt-$toolchain.mk"
486 if enabled $tgt; then
487 echo "Creating makefiles for ${toolchain} ${tgt}"
488 write_common_target_config_mk $tgt_fn ${BUILD_PFX}vpx_config.h
489 #write_${tgt}_config
491 done
495 process_detect() {
496 if enabled shared; then
497 # Can only build shared libs on a subset of platforms. Doing this check
498 # here rather than at option parse time because the target auto-detect
499 # magic happens after the command line has been parsed.
500 if ! enabled linux; then
501 if enabled gnu; then
502 echo "--enable-shared is only supported on ELF; assuming this is OK"
503 else
504 die "--enable-shared only supported on ELF for now"
508 if [ -z "$CC" ] || enabled external_build; then
509 echo "Bypassing toolchain for environment detection."
510 enable external_build
511 check_header() {
512 log fake_check_header "$@"
513 header=$1
514 shift
515 var=`echo $header | sed 's/[^A-Za-z0-9_]/_/g'`
516 disable $var
517 # Headers common to all environments
518 case $header in
519 stdio.h)
520 true;
523 local result=false
524 for d in "$@"; do
525 [ -f "${d##-I}/$header" ] && result=true && break
526 done
527 ${result:-true}
528 esac && enable $var
530 # Specialize windows and POSIX environments.
531 case $toolchain in
532 *-win*-*)
533 case $header-$toolchain in
534 stdint*-gcc) true;;
535 *) false;;
536 esac && enable $var
539 case $header in
540 stdint.h) true;;
541 pthread.h) true;;
542 sys/mman.h) true;;
543 unistd.h) true;;
544 *) false;;
545 esac && enable $var
546 esac
547 enabled $var
549 check_ld() {
550 true
553 check_header stdio.h || die "Unable to invoke compiler: ${CC} ${CFLAGS}"
554 check_ld <<EOF || die "Toolchain is unable to link executables"
555 int main(void) {return 0;}
557 # check system headers
558 check_header stdint.h
559 check_header pthread.h
560 check_header sys/mman.h
561 check_header unistd.h # for sysconf(3) and friends.
563 check_header vpx/vpx_integer.h -I${source_path} && enable vpx_ports
566 process_toolchain() {
567 process_common_toolchain
569 # Handle universal binaries for this architecture
570 case $toolchain in
571 universal-darwin*)
572 local darwin_ver=${tgt_os##darwin}
574 # Snow Leopard (10.6/darwin10) dropped support for PPC
575 # Include PPC support for all prior versions
576 if [ $darwin_ver -lt 10 ]; then
577 fat_bin_archs="$fat_bin_archs ppc32-${tgt_os}-gcc"
580 # Tiger (10.4/darwin8) brought support for x86
581 if [ $darwin_ver -ge 8 ]; then
582 fat_bin_archs="$fat_bin_archs x86-${tgt_os}-${tgt_cc}"
585 # Leopard (10.5/darwin9) brought 64 bit support
586 if [ $darwin_ver -ge 9 ]; then
587 fat_bin_archs="$fat_bin_archs x86_64-${tgt_os}-${tgt_cc}"
590 esac
593 # Enable some useful compiler flags
594 if enabled gcc; then
595 enabled werror && check_add_cflags -Werror
596 check_add_cflags -Wall
597 check_add_cflags -Wdeclaration-after-statement
598 check_add_cflags -Wdisabled-optimization
599 check_add_cflags -Wpointer-arith
600 check_add_cflags -Wtype-limits
601 check_add_cflags -Wcast-qual
602 check_add_cflags -Wvla
603 check_add_cflags -Wimplicit-function-declaration
604 check_add_cflags -Wuninitialized
605 check_add_cflags -Wunused-variable
606 case ${CC} in
607 *clang*) ;;
608 *) check_add_cflags -Wunused-but-set-variable ;;
609 esac
610 enabled extra_warnings || check_add_cflags -Wno-unused-function
613 if enabled icc; then
614 enabled werror && check_add_cflags -Werror
615 check_add_cflags -Wall
616 check_add_cflags -Wpointer-arith
618 # ICC has a number of floating point optimizations that we disable
619 # in favor of deterministic output WRT to other compilers
620 add_cflags -fp-model precise
623 # Enable extra, harmless warnings. These might provide additional insight
624 # to what the compiler is doing and why, but in general, but they shouldn't
625 # be treated as fatal, even if we're treating warnings as errors.
626 GCC_EXTRA_WARNINGS="
627 -Wdisabled-optimization
628 -Winline
630 enabled gcc && EXTRA_WARNINGS="${GCC_EXTRA_WARNINGS}"
631 RVCT_EXTRA_WARNINGS="
632 --remarks
634 enabled rvct && EXTRA_WARNINGS="${RVCT_EXTRA_WARNINGS}"
635 if enabled extra_warnings; then
636 for w in ${EXTRA_WARNINGS}; do
637 check_add_cflags ${w}
638 enabled gcc && enabled werror && check_add_cflags -Wno-error=${w}
639 done
642 # ccache only really works on gcc toolchains
643 enabled gcc || soft_disable ccache
644 if enabled mips; then
645 enable dequant_tokens
646 enable dc_recon
649 # Enable the postbuild target if building for visual studio.
650 case "$tgt_cc" in
651 vs*) enable msvs
652 enable solution
653 vs_version=${tgt_cc##vs}
654 case $vs_version in
655 [789])
656 VCPROJ_SFX=vcproj
657 gen_vcproj_cmd=${source_path}/build/make/gen_msvs_proj.sh
659 10|11)
660 VCPROJ_SFX=vcxproj
661 gen_vcproj_cmd=${source_path}/build/make/gen_msvs_vcxproj.sh
663 esac
664 all_targets="${all_targets} solution"
665 INLINE="__forceinline"
667 esac
669 # Other toolchain specific defaults
670 case $toolchain in x86*|ppc*|universal*) soft_enable postproc;; esac
672 if enabled postproc_visualizer; then
673 enabled postproc || die "postproc_visualizer requires postproc to be enabled"
676 # Enable unit tests by default if we have a working C++ compiler.
677 case "$toolchain" in
678 *-vs*)
679 soft_enable unit_tests
681 *-android-*)
682 # GTestLog must be modified to use Android logging utilities.
684 *-darwin-*)
685 # iOS/ARM builds do not work with gtest. This does not match
686 # x86 targets.
688 *-win*)
689 # Some mingw toolchains don't have pthread available by default.
690 # Treat these more like visual studio where threading in gtest
691 # would be disabled for the same reason.
692 check_cxx "$@" <<EOF && soft_enable unit_tests
693 int z;
697 enabled pthread_h && check_cxx "$@" <<EOF && soft_enable unit_tests
698 int z;
701 esac
706 ## END APPLICATION SPECIFIC CONFIGURATION
708 CONFIGURE_ARGS="$@"
709 process "$@"
710 print_webm_license ${BUILD_PFX}vpx_config.c "/*" " */"
711 cat <<EOF >> ${BUILD_PFX}vpx_config.c
712 static const char* const cfg = "$CONFIGURE_ARGS";
713 const char *vpx_codec_build_config(void) {return cfg;}