configure: Disentangle vfw32 and user32 lib handling
[libav.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-outdevs           show all available output devices
77   --list-filters           show all available filters
78
79 Standard options:
80   --logfile=FILE           log tests and output to FILE [config.log]
81   --disable-logging        do not log configure debug information
82   --prefix=PREFIX          install in PREFIX [$prefix_default]
83   --bindir=DIR             install binaries in DIR [PREFIX/bin]
84   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
85   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
86   --libdir=DIR             install libs in DIR [PREFIX/lib]
87   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
88   --incdir=DIR             install includes in DIR [PREFIX/include]
89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
90   --enable-rpath           use rpath when linking programs (USE WITH CARE)
91
92 Licensing options:
93   --enable-gpl             allow use of GPL code, the resulting libs
94                            and binaries will be under GPL [no]
95   --enable-version3        upgrade (L)GPL to version 3 [no]
96   --enable-nonfree         allow use of nonfree code, the resulting libs
97                            and binaries will be unredistributable [no]
98
99 Configuration options:
100   --disable-static         do not build static libraries [no]
101   --enable-shared          build shared libraries [no]
102   --enable-small           optimize for size instead of speed
103   --enable-runtime-cpudetect detect CPU capabilities at runtime (bigger binary)
104   --enable-gray            enable full grayscale support (slower color)
105   --disable-swscale-alpha  disable alpha channel support in swscale
106   --disable-all            disable building components, libraries and programs
107
108 Program options:
109   --disable-programs       do not build command line programs
110   --disable-avconv         disable avconv build
111   --disable-avplay         disable avplay build
112   --disable-avprobe        disable avprobe build
113   --disable-avserver       deprecated, does nothing
114
115 Component options:
116   --disable-doc            do not build documentation
117   --disable-pod2man        do not build manual pages
118   --disable-texi2html      do not build HTML documentation
119   --disable-avdevice       disable libavdevice build
120   --disable-avcodec        disable libavcodec build
121   --disable-avformat       disable libavformat build
122   --disable-avutil         disable libavutil build
123   --disable-swscale        disable libswscale build
124   --disable-avfilter       disable video filter support [no]
125   --disable-avresample     disable libavresample build [no]
126   --disable-pthreads       disable pthreads [auto]
127   --disable-w32threads     disable Win32 threads [auto]
128   --disable-network        disable network support [no]
129   --disable-dct            disable DCT code
130   --disable-error-resilience disable error resilience code
131   --disable-lsp            disable LSP code
132   --disable-lzo            disable LZO decoder code
133   --disable-mdct           disable MDCT code
134   --disable-rdft           disable RDFT code
135   --disable-fft            disable FFT code
136   --disable-faan           disable floating point AAN (I)DCT code
137
138 Individual component options:
139   --disable-everything     disable all components listed below
140   --disable-encoder=NAME   disable encoder NAME
141   --enable-encoder=NAME    enable encoder NAME
142   --disable-encoders       disable all encoders
143   --disable-decoder=NAME   disable decoder NAME
144   --enable-decoder=NAME    enable decoder NAME
145   --disable-decoders       disable all decoders
146   --disable-hwaccel=NAME   disable hwaccel NAME
147   --enable-hwaccel=NAME    enable hwaccel NAME
148   --disable-hwaccels       disable all hwaccels
149   --disable-muxer=NAME     disable muxer NAME
150   --enable-muxer=NAME      enable muxer NAME
151   --disable-muxers         disable all muxers
152   --disable-demuxer=NAME   disable demuxer NAME
153   --enable-demuxer=NAME    enable demuxer NAME
154   --disable-demuxers       disable all demuxers
155   --enable-parser=NAME     enable parser NAME
156   --disable-parser=NAME    disable parser NAME
157   --disable-parsers        disable all parsers
158   --enable-bsf=NAME        enable bitstream filter NAME
159   --disable-bsf=NAME       disable bitstream filter NAME
160   --disable-bsfs           disable all bitstream filters
161   --enable-protocol=NAME   enable protocol NAME
162   --disable-protocol=NAME  disable protocol NAME
163   --disable-protocols      disable all protocols
164   --enable-indev=NAME      enable input device NAME
165   --disable-indev=NAME     disable input device NAME
166   --disable-indevs         disable input devices
167   --enable-outdev=NAME     enable output device NAME
168   --disable-outdev=NAME    disable output device NAME
169   --disable-outdevs        disable output devices
170   --disable-devices        disable all devices
171   --enable-filter=NAME     enable filter NAME
172   --disable-filter=NAME    disable filter NAME
173   --disable-filters        disable all filters
174
175 External library support:
176
177   Using any of the following switches will allow Libav to link to the
178   corresponding external library. All the components depending on that library
179   will become enabled, if all their other dependencies are met and they are not
180   explicitly disabled. E.g. --enable-libwavpack will enable linking to
181   libwavpack and allow the libwavpack encoder to be built, unless it is
182   specifically disabled with --disable-encoder=libwavpack.
183
184   Note that only the system libraries are auto-detected. All the other external
185   libraries must be explicitly enabled.
186
187   Also note that the following help text describes the purpose of the libraries
188   themselves, not all their features will necessarily be usable by Libav.
189
190   --enable-avisynth          video frameserver
191   --enable-avxsynth          Linux version of AviSynth
192   --enable-bzlib             bzip2 compression [autodetect]
193   --enable-frei0r            video filtering plugins
194   --enable-gnutls            crypto
195   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
196   --enable-libcdio           audio CD input
197   --enable-libdc1394         IEEE 1394/Firewire camera input
198   --enable-libdcadec         DCA audio decoding
199   --enable-libfaac           AAC audio encoding
200   --enable-libfdk-aac        AAC audio encoding/decoding
201   --enable-libfontconfig     font configuration and management
202   --enable-libfreetype       font rendering
203   --enable-libgsm            GSM audio encoding/decoding
204   --enable-libhdcd           HDCD decoding filter
205   --enable-libilbc           ILBC audio encoding/decoding
206   --enable-libkvazaar        HEVC video encoding
207   --enable-libmp3lame        MP3 audio encoding
208   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
209   --enable-libopencore-amrwb AMR-WB audio decoding
210   --enable-libopencv         computer vision
211   --enable-libopenh264       H.264 video encoding/decoding
212   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
213   --enable-libopus           Opus audio encoding/decoding
214   --enable-libpulse          Pulseaudio sound server
215   --enable-librtmp           RTMP streaming
216   --enable-libschroedinger   Dirac video encoding/decoding
217   --enable-libsnappy         snappy compression
218   --enable-libspeex          Speex audio encoding/decoding
219   --enable-libtheora         Theora video encoding/decoding
220   --enable-libtwolame        MP2 audio encoding
221   --enable-libvo-aacenc      AAC audio encoding
222   --enable-libvo-amrwbenc    AMR-WB audio encoding
223   --enable-libvorbis         Vorbis audio encoding/decoding
224   --enable-libvpx            VP* video encoding/decoding
225   --enable-libwavpack        Wavpack audio encoding/decoding
226   --enable-libwebp           WebP image encoding/decoding
227   --enable-libx264           H.264 video encoding
228   --enable-libx265           HEVC video encoding
229   --enable-libxavs           Chinese AVS video encoding
230   --enable-libxcb            X window system protocol communication
231   --enable-libxcb-shm        X11 shm communication [auto]
232   --enable-libxcb-xfixes     X11 mouse rendering [auto]
233   --enable-libxvid           MPEG-4 ASP video encoding
234   --enable-openssl           crypto
235   --enable-zlib              compression [autodetect]
236
237   The following libraries provide various hardware acceleration features:
238   --enable-cuda    Nvidia CUDA (dynamically linked)
239   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
240   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
241   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
242   --enable-libnpp  Nvidia CUDA processing
243   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
244   --enable-nvenc   Nvidia video encoding
245   --enable-omx     OpenMAX IL
246   --enable-omx-rpi OpenMAX IL for Raspberry Pi
247   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
248   --enable-vda     Apple Video Decode Acceleration [auto]
249   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
250
251 Toolchain options:
252   --arch=ARCH              select architecture [$arch]
253   --cpu=CPU                select the minimum required CPU (affects
254                            instruction selection, may crash on older CPUs)
255   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
256   --enable-cross-compile   assume a cross-compiler is used
257   --sysroot=PATH           root of cross-build tree
258   --sysinclude=PATH        location of cross-build system headers
259   --target-os=OS           compiler targets OS [$target_os]
260   --target-exec=CMD        command to run executables on target
261   --target-path=DIR        path to view of build directory on target
262   --target-samples=DIR     path to samples directory on target
263   --toolchain=NAME         set tool defaults according to NAME
264   --nm=NM                  use nm tool
265   --ar=AR                  use archive tool AR [$ar_default]
266   --as=AS                  use assembler AS [$as_default]
267   --cc=CC                  use C compiler CC [$cc_default]
268   --objcc=OCC              use ObjC compiler OCC [$cc_default]
269   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
270   --ld=LD                  use linker LD
271   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
272   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
273   --host-cc=HOSTCC         use host C compiler HOSTCC
274   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
275   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
276   --host-ld=HOSTLD         use host linker HOSTLD
277   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
278   --host-libs=HLIBS        use libs HLIBS when linking for host
279   --host-os=OS             compiler host OS [$target_os]
280   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
281   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
282   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
283   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
284   --extra-libs=ELIBS       add ELIBS [$ELIBS]
285   --extra-version=STRING   version string suffix []
286   --optflags=OPTFLAGS      override optimization-related compiler flags
287   --enable-pic             build position-independent code
288   --enable-thumb           compile for Thumb instruction set
289   --enable-lto             use link-time optimization
290   --env="ENV=override"     override the environment variables
291
292 Advanced options (experts only):
293   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
294   --custom-allocator=NAME  use a supported custom allocator
295   --disable-symver         disable symbol versioning
296   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
297   --disable-safe-bitstream-reader
298                            disable buffer boundary checking in bitreaders
299                            (faster, but may crash)
300   --enable-sram            allow use of on-chip SRAM
301
302 Optimization options (experts only):
303   --disable-asm            disable all assembly optimizations
304   --disable-altivec        disable AltiVec optimizations
305   --disable-vsx            disable VSX optimizations
306   --disable-power8         disable POWER8 optimizations
307   --disable-amd3dnow       disable 3DNow! optimizations
308   --disable-amd3dnowext    disable 3DNow! extended optimizations
309   --disable-mmx            disable MMX optimizations
310   --disable-mmxext         disable MMXEXT optimizations
311   --disable-sse            disable SSE optimizations
312   --disable-sse2           disable SSE2 optimizations
313   --disable-sse3           disable SSE3 optimizations
314   --disable-ssse3          disable SSSE3 optimizations
315   --disable-sse4           disable SSE4 optimizations
316   --disable-sse42          disable SSE4.2 optimizations
317   --disable-avx            disable AVX optimizations
318   --disable-xop            disable XOP optimizations
319   --disable-fma3           disable FMA3 optimizations
320   --disable-fma4           disable FMA4 optimizations
321   --disable-avx2           disable AVX2 optimizations
322   --disable-armv5te        disable armv5te optimizations
323   --disable-armv6          disable armv6 optimizations
324   --disable-armv6t2        disable armv6t2 optimizations
325   --disable-vfp            disable VFP optimizations
326   --disable-neon           disable NEON optimizations
327   --disable-inline-asm     disable use of inline assembly
328   --disable-yasm           disable use of nasm/yasm assembly
329
330 Developer options (useful when working on Libav itself):
331   --disable-debug          disable debugging symbols
332   --enable-debug=LEVEL     set the debug level [$debuglevel]
333   --disable-optimizations  disable compiler optimizations
334   --enable-extra-warnings  enable more compiler warnings
335   --samples=PATH           location of test samples for FATE, if not set use
336                            \$LIBAV_SAMPLES at make invocation time.
337   --enable-neon-clobber-test check NEON registers for clobbering (should be
338                            used only for debugging purposes)
339   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
340                            should be used only for debugging purposes)
341   --enable-random          randomly enable/disable components
342   --disable-random
343   --enable-random=LIST     randomly enable/disable specific components or
344   --disable-random=LIST    component groups. LIST is a comma-separated list
345                            of NAME[:PROB] entries where NAME is a component
346                            (group) and PROB the probability associated with
347                            NAME (default 0.5).
348   --random-seed=VALUE      seed value for --enable/disable-random
349   --disable-valgrind-backtrace do not print a backtrace under Valgrind
350                            (only applies to --disable-optimizations builds)
351
352 NOTE: Object files are built at the place where configure is launched.
353 EOF
354   exit 0
355 }
356
357 quotes='""'
358
359 log(){
360     echo "$@" >> $logfile
361 }
362
363 log_file(){
364     log BEGIN $1
365     i=1
366     while read line; do
367         printf '%5s   %s\n' "${i}" "${line}"
368         i=$(($i+1))
369     done < $1 >> $logfile
370     log END $1
371 }
372
373 echolog(){
374     log "$@"
375     echo "$@"
376 }
377
378 warn(){
379     log "WARNING: $*"
380     WARNINGS="${WARNINGS}WARNING: $*\n"
381 }
382
383 die(){
384     echolog "$@"
385     cat <<EOF
386
387 If you think configure made a mistake, make sure you are using the latest
388 version from Git.  If the latest version fails, report the problem to the
389 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
390 EOF
391     if disabled logging; then
392         cat <<EOF
393 Rerun configure with logging enabled (do not use --disable-logging), and
394 include the log this produces with your report.
395 EOF
396     else
397         cat <<EOF
398 Include the log file "$logfile" produced by configure as this will help
399 solving the problem.
400 EOF
401     fi
402     exit 1
403 }
404
405 # Avoid locale weirdness, besides we really just want to translate ASCII.
406 toupper(){
407     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
408 }
409
410 tolower(){
411     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
412 }
413
414 c_escape(){
415     echo "$*" | sed 's/["\\]/\\\0/g'
416 }
417
418 sh_quote(){
419     v=$(echo "$1" | sed "s/'/'\\\\''/g")
420     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
421     echo "$v"
422 }
423
424 cleanws(){
425     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
426 }
427
428 filter(){
429     pat=$1
430     shift
431     for v; do
432         eval "case $v in $pat) printf '%s ' $v ;; esac"
433     done
434 }
435
436 filter_out(){
437     pat=$1
438     shift
439     for v; do
440         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
441     done
442 }
443
444 map(){
445     m=$1
446     shift
447     for v; do eval $m; done
448 }
449
450 add_suffix(){
451     suffix=$1
452     shift
453     for v; do echo ${v}${suffix}; done
454 }
455
456 set_all(){
457     value=$1
458     shift
459     for var in $*; do
460         eval $var=$value
461     done
462 }
463
464 set_weak(){
465     value=$1
466     shift
467     for var; do
468         eval : \${$var:=$value}
469     done
470 }
471
472 sanitize_var_name(){
473     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
474 }
475
476 set_safe(){
477     var=$1
478     shift
479     eval $(sanitize_var_name "$var")='$*'
480 }
481
482 get_safe(){
483     eval echo \$$(sanitize_var_name "$1")
484 }
485
486 pushvar(){
487     for pvar in $*; do
488         eval level=\${${pvar}_level:=0}
489         eval ${pvar}_${level}="\$$pvar"
490         eval ${pvar}_level=$(($level+1))
491     done
492 }
493
494 popvar(){
495     for pvar in $*; do
496         eval level=\${${pvar}_level:-0}
497         test $level = 0 && continue
498         eval level=$(($level-1))
499         eval $pvar="\${${pvar}_${level}}"
500         eval ${pvar}_level=$level
501         eval unset ${pvar}_${level}
502     done
503 }
504
505 enable(){
506     set_all yes $*
507 }
508
509 disable(){
510     set_all no $*
511 }
512
513 enable_weak(){
514     set_weak yes $*
515 }
516
517 disable_weak(){
518     set_weak no $*
519 }
520
521 enable_safe(){
522     for var; do
523         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
524     done
525 }
526
527 disable_safe(){
528     for var; do
529         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
530     done
531 }
532
533 do_enable_deep(){
534     for var; do
535         enabled $var && continue
536         eval sel="\$${var}_select"
537         eval sgs="\$${var}_suggest"
538         pushvar var sgs
539         enable_deep $sel
540         popvar sgs
541         enable_deep_weak $sgs
542         popvar var
543     done
544 }
545
546 enable_deep(){
547     do_enable_deep $*
548     enable $*
549 }
550
551 enable_deep_weak(){
552     for var; do
553         disabled $var && continue
554         pushvar var
555         do_enable_deep $var
556         popvar var
557         enable_weak $var
558     done
559 }
560
561 enabled(){
562     test "${1#!}" = "$1" && op== || op=!=
563     eval test "x\$${1#!}" $op "xyes"
564 }
565
566 disabled(){
567     test "${1#!}" = "$1" && op== || op=!=
568     eval test "x\$${1#!}" $op "xno"
569 }
570
571 enabled_all(){
572     for opt; do
573         enabled $opt || return 1
574     done
575 }
576
577 disabled_all(){
578     for opt; do
579         disabled $opt || return 1
580     done
581 }
582
583 enabled_any(){
584     for opt; do
585         enabled $opt && return 0
586     done
587 }
588
589 disabled_any(){
590     for opt; do
591         disabled $opt && return 0
592     done
593     return 1
594 }
595
596 set_default(){
597     for opt; do
598         eval : \${$opt:=\$${opt}_default}
599     done
600 }
601
602 is_in(){
603     value=$1
604     shift
605     for var in $*; do
606         [ $var = $value ] && return 0
607     done
608     return 1
609 }
610
611 do_check_deps(){
612     for cfg; do
613         cfg="${cfg#!}"
614         enabled ${cfg}_checking && die "Circular dependency for $cfg."
615         disabled ${cfg}_checking && continue
616         enable ${cfg}_checking
617         append allopts $cfg
618
619         eval dep_all="\$${cfg}_deps"
620         eval dep_any="\$${cfg}_deps_any"
621         eval dep_sel="\$${cfg}_select"
622         eval dep_sgs="\$${cfg}_suggest"
623         eval dep_ifa="\$${cfg}_if"
624         eval dep_ifn="\$${cfg}_if_any"
625
626         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
627         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
628         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
629
630         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
631         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
632         enabled_all  $dep_all || disable $cfg
633         enabled_any  $dep_any || disable $cfg
634         disabled_any $dep_sel && disable $cfg
635
636         if enabled $cfg; then
637             enable_deep $dep_sel
638             enable_deep_weak $dep_sgs
639         fi
640
641         disable ${cfg}_checking
642     done
643 }
644
645 check_deps(){
646     unset allopts
647
648     do_check_deps "$@"
649
650     for cfg in $allopts; do
651         enabled $cfg || continue
652         eval dep_extralibs="\$${cfg}_extralibs"
653         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
654     done
655 }
656
657 print_config(){
658     pfx=$1
659     files=$2
660     shift 2
661     map 'eval echo "$v \${$v:-no}"' "$@" |
662     awk "BEGIN { split(\"$files\", files) }
663         {
664             c = \"$pfx\" toupper(\$1);
665             v = \$2;
666             sub(/yes/, 1, v);
667             sub(/no/,  0, v);
668             for (f in files) {
669                 file = files[f];
670                 if (file ~ /\\.h\$/) {
671                     printf(\"#define %s %d\\n\", c, v) >>file;
672                 } else if (file ~ /\\.asm\$/) {
673                     printf(\"%%define %s %d\\n\", c, v) >>file;
674                 } else if (file ~ /\\.mak\$/) {
675                     n = -v ? \"\" : \"!\";
676                     printf(\"%s%s=yes\\n\", n, c) >>file;
677                 }
678             }
679         }"
680 }
681
682 print_enabled(){
683     suf=$1
684     shift
685     for v; do
686         enabled $v && printf "%s\n" ${v%$suf}
687     done
688 }
689
690 append(){
691     var=$1
692     shift
693     eval "$var=\"\$$var $*\""
694 }
695
696 prepend(){
697     var=$1
698     shift
699     eval "$var=\"$* \$$var\""
700 }
701
702 unique(){
703     var=$1
704     uniq_list=""
705     for tok in $(eval echo \$$var); do
706         uniq_list="$(filter_out $tok $uniq_list) $tok"
707     done
708     eval "$var=\"${uniq_list}\""
709 }
710
711 add_cppflags(){
712     append CPPFLAGS "$@"
713 }
714
715 add_cflags(){
716     append CFLAGS $($cflags_filter "$@")
717 }
718
719 add_cflags_headers(){
720     append CFLAGS_HEADERS $($cflags_filter "$@")
721 }
722
723 add_asflags(){
724     append ASFLAGS $($asflags_filter "$@")
725 }
726
727 add_objcflags(){
728     append OBJCFLAGS $($objcflags_filter "$@")
729 }
730
731 add_ldflags(){
732     append LDFLAGS $($ldflags_filter "$@")
733 }
734
735 add_ldexeflags(){
736     append LDEXEFLAGS $($ldflags_filter "$@")
737 }
738
739 add_stripflags(){
740     append STRIPFLAGS "$@"
741 }
742
743 add_extralibs(){
744     prepend extralibs $($ldflags_filter "$@")
745 }
746
747 add_host_cppflags(){
748     append host_cppflags "$@"
749 }
750
751 add_host_cflags(){
752     append host_cflags $($host_cflags_filter "$@")
753 }
754
755 add_host_ldflags(){
756     append host_ldflags $($host_ldflags_filter "$@")
757 }
758
759 add_compat(){
760     append compat_objs $1
761     shift
762     map 'add_cppflags -D$v' "$@"
763 }
764
765 check_cmd(){
766     log "$@"
767     "$@" >> $logfile 2>&1
768 }
769
770 cc_o(){
771     eval printf '%s\\n' $CC_O
772 }
773
774 cc_e(){
775     eval printf '%s\\n' $CC_E
776 }
777
778 check_cc(){
779     log check_cc "$@"
780     cat > $TMPC
781     log_file $TMPC
782     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
783 }
784
785 check_objcc(){
786     log check_objcc "$@"
787     cat > $TMPC
788     log_file $TMPC
789     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
790 }
791
792 check_cpp(){
793     log check_cpp "$@"
794     cat > $TMPC
795     log_file $TMPC
796     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
797 }
798
799 as_o(){
800     eval printf '%s\\n' $AS_O
801 }
802
803 check_as(){
804     log check_as "$@"
805     cat > $TMPS
806     log_file $TMPS
807     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
808 }
809
810 check_inline_asm(){
811     log check_inline_asm "$@"
812     name="$1"
813     code="$2"
814     shift 2
815     disable $name
816     check_cc "$@" <<EOF && enable $name
817 void foo(void){ __asm__ volatile($code); }
818 EOF
819 }
820
821 check_insn(){
822     log check_insn "$@"
823     check_inline_asm ${1}_inline "\"$2\""
824     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
825 }
826
827 check_yasm(){
828     log check_yasm "$@"
829     echo "$1" > $TMPS
830     log_file $TMPS
831     shift 1
832     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
833 }
834
835 ld_o(){
836     eval printf '%s\\n' $LD_O
837 }
838
839 check_ld(){
840     log check_ld "$@"
841     flags=$(filter_out '-l*' "$@")
842     libs=$(filter '-l*' "$@")
843     check_cc $($cflags_filter $flags) || return
844     flags=$($ldflags_filter $flags)
845     libs=$($ldflags_filter $libs)
846     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
847 }
848
849 print_include(){
850     hdr=$1
851     test "${hdr%.h}" = "${hdr}" &&
852         echo "#include $hdr"    ||
853         echo "#include <$hdr>"
854 }
855
856 check_code(){
857     log check_code "$@"
858     check=$1
859     headers=$2
860     code=$3
861     shift 3
862     {
863         for hdr in $headers; do
864             print_include $hdr
865         done
866         echo "int main(void) { $code; return 0; }"
867     } | check_$check "$@"
868 }
869
870 check_cppflags(){
871     log check_cppflags "$@"
872     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
873 int x;
874 EOF
875 }
876
877 test_cflags(){
878     log test_cflags "$@"
879     set -- $($cflags_filter "$@")
880     check_cc "$@" <<EOF
881 int x;
882 EOF
883 }
884
885 check_cflags(){
886     log check_cflags "$@"
887     test_cflags "$@" && add_cflags "$@"
888 }
889
890 test_objcflags(){
891     log test_objcflags "$@"
892     set -- $($objcflags_filter "$@")
893     check_objcc "$@" <<EOF
894 int x;
895 EOF
896 }
897
898 check_objcflags(){
899     log check_objcflags "$@"
900     test_objcflags "$@" && add_objcflags "$@"
901 }
902
903 test_ldflags(){
904     log test_ldflags "$@"
905     check_ld "$@" <<EOF
906 int main(void){ return 0; }
907 EOF
908 }
909
910 check_ldflags(){
911     log check_ldflags "$@"
912     test_ldflags "$@" && add_ldflags "$@"
913 }
914
915 test_stripflags(){
916     log test_stripflags "$@"
917     # call check_cc to get a fresh TMPO
918     check_cc <<EOF
919 int main(void) { return 0; }
920 EOF
921     check_cmd $strip $STRIPFLAGS "$@" $TMPO
922 }
923
924 check_stripflags(){
925     log check_stripflags "$@"
926     test_stripflags "$@" && add_stripflags "$@"
927 }
928
929 check_header(){
930     log check_header "$@"
931     header=$1
932     shift
933     disable_safe $header
934     check_cpp "$@" <<EOF && enable_safe $header
935 #include <$header>
936 int x;
937 EOF
938 }
939
940 check_func(){
941     log check_func "$@"
942     func=$1
943     shift
944     disable $func
945     check_ld "$@" <<EOF && enable $func
946 extern int $func();
947 int main(void){ $func(); }
948 EOF
949 }
950
951 check_mathfunc(){
952     log check_mathfunc "$@"
953     func=$1
954     narg=$2
955     shift 2
956     test $narg = 2 && args="f, g" || args="f"
957     disable $func
958     check_ld "$@" <<EOF && enable $func
959 #include <math.h>
960 float foo(float f, float g) { return $func($args); }
961 int main(void){ return 0; }
962 EOF
963 }
964
965 check_func_headers(){
966     log check_func_headers "$@"
967     headers=$1
968     funcs=$2
969     shift 2
970     {
971         for hdr in $headers; do
972             print_include $hdr
973         done
974         for func in $funcs; do
975             echo "long check_$func(void) { return (long) $func; }"
976         done
977         echo "int main(void) { return 0; }"
978     } | check_ld "$@" && enable $funcs && enable_safe $headers
979 }
980
981 check_cpp_condition(){
982     log check_cpp_condition "$@"
983     header=$1
984     condition=$2
985     shift 2
986     check_cpp "$@" <<EOF
987 #include <$header>
988 #if !($condition)
989 #error "unsatisfied condition: $condition"
990 #endif
991 EOF
992 }
993
994 test_cflags_cpp(){
995     log test_cflags_cpp "$@"
996     flags=$1
997     condition=$2
998     shift 2
999     set -- $($cflags_filter "$flags")
1000     check_cpp "$@" <<EOF
1001 #if !($condition)
1002 #error "unsatisfied condition: $condition"
1003 #endif
1004 EOF
1005 }
1006
1007 check_lib(){
1008     log check_lib "$@"
1009     headers="$1"
1010     funcs="$2"
1011     shift 2
1012     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1013 }
1014
1015 check_pkg_config(){
1016     log check_pkg_config "$@"
1017     pkg_version="$1"
1018     pkg="${1%% *}"
1019     headers="$2"
1020     funcs="$3"
1021     shift 3
1022     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1023     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1024     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1025     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1026         set_safe "${pkg}_cflags"    $pkg_cflags &&
1027         set_safe "${pkg}_extralibs" $pkg_libs
1028 }
1029
1030 check_exec(){
1031     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1032 }
1033
1034 check_exec_crash(){
1035     log check_exec_crash "$@"
1036     code=$(cat)
1037
1038     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1039     # are safe but may not be available everywhere.  Thus we use
1040     # raise(SIGTERM) instead.  The check is run in a subshell so we
1041     # can redirect the "Terminated" message from the shell.  SIGBUS
1042     # is not defined by standard C so it is used conditionally.
1043
1044     (check_exec "$@") >> $logfile 2>&1 <<EOF
1045 #include <signal.h>
1046 static void sighandler(int sig){
1047     raise(SIGTERM);
1048 }
1049 int foo(void){
1050     $code
1051 }
1052 int (*func_ptr)(void) = foo;
1053 int main(void){
1054     signal(SIGILL, sighandler);
1055     signal(SIGFPE, sighandler);
1056     signal(SIGSEGV, sighandler);
1057 #ifdef SIGBUS
1058     signal(SIGBUS, sighandler);
1059 #endif
1060     return func_ptr();
1061 }
1062 EOF
1063 }
1064
1065 check_type(){
1066     log check_type "$@"
1067     headers=$1
1068     type=$2
1069     shift 2
1070     disable_safe "$type"
1071     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1072 }
1073
1074 check_struct(){
1075     log check_struct "$@"
1076     headers=$1
1077     struct=$2
1078     member=$3
1079     shift 3
1080     disable_safe "${struct}_${member}"
1081     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1082         enable_safe "${struct}_${member}"
1083 }
1084
1085 check_builtin(){
1086     log check_builtin "$@"
1087     name=$1
1088     headers=$2
1089     builtin=$3
1090     shift 3
1091     disable "$name"
1092     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1093 }
1094
1095 check_compile_assert(){
1096     log check_compile_assert "$@"
1097     name=$1
1098     headers=$2
1099     condition=$3
1100     shift 3
1101     disable "$name"
1102     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1103 }
1104
1105 require(){
1106     log require "$@"
1107     name_version="$1"
1108     headers="$2"
1109     func="$3"
1110     shift 3
1111     check_lib "$headers" $func "$@" || die "ERROR: $name_version not found"
1112 }
1113
1114 require_pkg_config(){
1115     log require_pkg_config "$@"
1116     pkg_version="$1"
1117     pkg="${1%% *}"
1118     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1119     add_cflags    $(get_safe "${pkg}_cflags")
1120     add_extralibs $(get_safe "${pkg}_extralibs")
1121 }
1122
1123 hostcc_e(){
1124     eval printf '%s\\n' $HOSTCC_E
1125 }
1126
1127 hostcc_o(){
1128     eval printf '%s\\n' $HOSTCC_O
1129 }
1130
1131 check_host_cc(){
1132     log check_host_cc "$@"
1133     cat > $TMPC
1134     log_file $TMPC
1135     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1136 }
1137
1138 check_host_cpp(){
1139     log check_host_cpp "$@"
1140     cat > $TMPC
1141     log_file $TMPC
1142     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1143 }
1144
1145 check_host_cppflags(){
1146     log check_host_cppflags "$@"
1147     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1148 int x;
1149 EOF
1150 }
1151
1152 check_host_cflags(){
1153     log check_host_cflags "$@"
1154     set -- $($host_cflags_filter "$@")
1155     check_host_cc "$@" <<EOF && append host_cflags "$@"
1156 int x;
1157 EOF
1158 }
1159
1160 check_host_cpp_condition(){
1161     log check_host_cpp_condition "$@"
1162     header=$1
1163     condition=$2
1164     shift 2
1165     check_host_cpp "$@" <<EOF
1166 #include <$header>
1167 #if !($condition)
1168 #error "unsatisfied condition: $condition"
1169 #endif
1170 EOF
1171 }
1172
1173 apply(){
1174     file=$1
1175     shift
1176     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1177 }
1178
1179 cp_if_changed(){
1180     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1181     mkdir -p "$(dirname $2)"
1182     cp -f "$1" "$2"
1183 }
1184
1185 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1186 # system-dependent things.
1187
1188 AVCODEC_COMPONENTS="
1189     bsfs
1190     decoders
1191     encoders
1192     hwaccels
1193     parsers
1194 "
1195
1196 AVDEVICE_COMPONENTS="
1197     indevs
1198     outdevs
1199 "
1200 AVFILTER_COMPONENTS="
1201     filters
1202 "
1203 AVFORMAT_COMPONENTS="
1204     demuxers
1205     muxers
1206     protocols
1207 "
1208
1209 AVRESAMPLE_COMPONENTS=""
1210 AVUTIL_COMPONENTS=""
1211
1212 COMPONENT_LIST="
1213     $AVCODEC_COMPONENTS
1214     $AVDEVICE_COMPONENTS
1215     $AVFILTER_COMPONENTS
1216     $AVFORMAT_COMPONENTS
1217     $AVRESAMPLE_COMPONENTS
1218     $AVUTIL_COMPONENTS
1219 "
1220
1221 EXAMPLE_LIST="
1222     decode_audio_example
1223     decode_video_example
1224     encode_audio_example
1225     encode_video_example
1226     filter_audio_example
1227     metadata_example
1228     output_example
1229     qsvdec_example
1230     transcode_aac_example
1231 "
1232
1233 HWACCEL_LIBRARY_NONFREE_LIST="
1234     cuda
1235     libnpp
1236 "
1237 HWACCEL_LIBRARY_LIST="
1238     $HWACCEL_LIBRARY_NONFREE_LIST
1239     d3d11va
1240     dxva2
1241     libmfx
1242     mmal
1243     nvenc
1244     omx
1245     vaapi
1246     vda
1247     vdpau
1248 "
1249
1250 EXTERNAL_LIBRARY_GPL_LIST="
1251     libcdio
1252     libx264
1253     libx265
1254     libxavs
1255     libxvid
1256 "
1257
1258 EXTERNAL_LIBRARY_NONFREE_LIST="
1259     libfaac
1260     libfdk_aac
1261     openssl
1262 "
1263
1264 EXTERNAL_LIBRARY_VERSION3_LIST="
1265     libopencore_amrnb
1266     libopencore_amrwb
1267     libvo_aacenc
1268     libvo_amrwbenc
1269 "
1270
1271 EXTERNAL_LIBRARY_LIST="
1272     $EXTERNAL_LIBRARY_GPL_LIST
1273     $EXTERNAL_LIBRARY_NONFREE_LIST
1274     $EXTERNAL_LIBRARY_VERSION3_LIST
1275     avisynth
1276     avxsynth
1277     bzlib
1278     frei0r
1279     gnutls
1280     libbs2b
1281     libdc1394
1282     libdcadec
1283     libfontconfig
1284     libfreetype
1285     libgsm
1286     libhdcd
1287     libilbc
1288     libkvazaar
1289     libmp3lame
1290     libopencv
1291     libopenh264
1292     libopenjpeg
1293     libopus
1294     libpulse
1295     librtmp
1296     libschroedinger
1297     libsnappy
1298     libspeex
1299     libtheora
1300     libtwolame
1301     libvorbis
1302     libvpx
1303     libwavpack
1304     libwebp
1305     libxcb
1306     libxcb_shm
1307     libxcb_xfixes
1308     zlib
1309 "
1310
1311 FEATURE_LIST="
1312     gray
1313     hardcoded_tables
1314     omx_rpi
1315     runtime_cpudetect
1316     safe_bitstream_reader
1317     shared
1318     small
1319     sram
1320     static
1321     swscale_alpha
1322 "
1323
1324 LIBRARY_LIST="
1325     avcodec
1326     avdevice
1327     avfilter
1328     avformat
1329     avresample
1330     avutil
1331     swscale
1332 "
1333
1334 LICENSE_LIST="
1335     gpl
1336     nonfree
1337     version3
1338 "
1339
1340 PROGRAM_LIST="
1341     avconv
1342     avplay
1343     avprobe
1344 "
1345
1346 SUBSYSTEM_LIST="
1347     dct
1348     doc
1349     error_resilience
1350     faan
1351     fft
1352     lsp
1353     lzo
1354     mdct
1355     network
1356     rdft
1357 "
1358
1359 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1360 CONFIG_LIST="
1361     $EXAMPLE_LIST
1362     $EXTERNAL_LIBRARY_LIST
1363     $HWACCEL_LIBRARY_LIST
1364     $FEATURE_LIST
1365     $LICENSE_LIST
1366     $LIBRARY_LIST
1367     $PROGRAM_LIST
1368     $SUBSYSTEM_LIST
1369     neon_clobber_test
1370     pic
1371     pod2man
1372     texi2html
1373     thumb
1374     valgrind_backtrace
1375     xmm_clobber_test
1376     $COMPONENT_LIST
1377 "
1378
1379 THREADS_LIST="
1380     pthreads
1381     w32threads
1382 "
1383
1384 ATOMICS_LIST="
1385     atomics_gcc
1386     atomics_suncc
1387     atomics_win32
1388 "
1389
1390 ARCH_LIST="
1391     aarch64
1392     alpha
1393     arm
1394     avr32
1395     avr32_ap
1396     avr32_uc
1397     bfin
1398     ia64
1399     m68k
1400     mips
1401     mips64
1402     parisc
1403     ppc
1404     ppc64
1405     s390
1406     sh4
1407     sparc
1408     sparc64
1409     tilegx
1410     tilepro
1411     tomi
1412     x86
1413     x86_32
1414     x86_64
1415 "
1416
1417 ARCH_EXT_LIST_ARM="
1418     armv5te
1419     armv6
1420     armv6t2
1421     armv8
1422     neon
1423     vfp
1424     vfpv3
1425 "
1426
1427 ARCH_EXT_LIST_X86_SIMD="
1428     amd3dnow
1429     amd3dnowext
1430     avx
1431     avx2
1432     fma3
1433     fma4
1434     mmx
1435     mmxext
1436     sse
1437     sse2
1438     sse3
1439     sse4
1440     sse42
1441     ssse3
1442     xop
1443 "
1444
1445 ARCH_EXT_LIST_PPC="
1446     altivec
1447     dcbzl
1448     ldbrx
1449     power8
1450     ppc4xx
1451     vsx
1452 "
1453
1454 ARCH_EXT_LIST_X86="
1455     $ARCH_EXT_LIST_X86_SIMD
1456     cpunop
1457     i686
1458 "
1459
1460 ARCH_EXT_LIST_MIPS="
1461     loongson
1462     mips32r1
1463     mips64r1
1464     mips32r2
1465     mips64r2
1466     mips32r6
1467     mips64r6
1468 "
1469
1470 ARCH_EXT_LIST="
1471     $ARCH_EXT_LIST_ARM
1472     $ARCH_EXT_LIST_MIPS
1473     $ARCH_EXT_LIST_PPC
1474     $ARCH_EXT_LIST_X86
1475     vis
1476 "
1477
1478 ARCH_FEATURES="
1479     aligned_stack
1480     fast_64bit
1481     fast_clz
1482     fast_cmov
1483     local_aligned_8
1484     local_aligned_16
1485     local_aligned_32
1486     simd_align_16
1487     simd_align_32
1488 "
1489
1490 BUILTIN_LIST="
1491     atomic_cas_ptr
1492     machine_rw_barrier
1493     MemoryBarrier
1494     mm_empty
1495     rdtsc
1496     sem_timedwait
1497     sync_val_compare_and_swap
1498 "
1499 HAVE_LIST_CMDLINE="
1500     inline_asm
1501     symver
1502     yasm
1503 "
1504
1505 HAVE_LIST_PUB="
1506     bigendian
1507     fast_unaligned
1508 "
1509
1510 HEADERS_LIST="
1511     AVFoundation_AVFoundation_h
1512     alsa_asoundlib_h
1513     altivec_h
1514     arpa_inet_h
1515     cdio_paranoia_h
1516     cdio_paranoia_paranoia_h
1517     d3d11_h
1518     dispatch_dispatch_h
1519     dev_bktr_ioctl_bt848_h
1520     dev_bktr_ioctl_meteor_h
1521     dev_ic_bt8xx_h
1522     dev_video_bktr_ioctl_bt848_h
1523     dev_video_meteor_ioctl_meteor_h
1524     direct_h
1525     dlfcn_h
1526     dxva_h
1527     gsm_h
1528     io_h
1529     mach_mach_time_h
1530     machine_ioctl_bt848_h
1531     machine_ioctl_meteor_h
1532     malloc_h
1533     poll_h
1534     sndio_h
1535     soundcard_h
1536     stdatomic_h
1537     sys_mman_h
1538     sys_param_h
1539     sys_resource_h
1540     sys_select_h
1541     sys_soundcard_h
1542     sys_time_h
1543     sys_un_h
1544     sys_videoio_h
1545     unistd_h
1546     valgrind_valgrind_h
1547     windows_h
1548     winsock2_h
1549 "
1550
1551 INTRINSICS_LIST="
1552     intrinsics_neon
1553 "
1554
1555 MATH_FUNCS="
1556     atanf
1557     atan2f
1558     cbrtf
1559     cosf
1560     exp2
1561     exp2f
1562     expf
1563     isinf
1564     isnan
1565     ldexpf
1566     llrint
1567     llrintf
1568     log2
1569     log2f
1570     log10f
1571     lrint
1572     lrintf
1573     powf
1574     rint
1575     round
1576     roundf
1577     sinf
1578     trunc
1579     truncf
1580 "
1581
1582 SYSTEM_FUNCS="
1583     aligned_malloc
1584     clock_gettime
1585     closesocket
1586     CommandLineToArgvW
1587     CoTaskMemFree
1588     CryptGenRandom
1589     dlopen
1590     fcntl
1591     flt_lim
1592     fork
1593     getaddrinfo
1594     gethrtime
1595     getopt
1596     GetProcessAffinityMask
1597     GetProcessMemoryInfo
1598     GetProcessTimes
1599     getrusage
1600     GetSystemTimeAsFileTime
1601     gettimeofday
1602     gmtime_r
1603     inet_aton
1604     isatty
1605     jack_port_get_latency_range
1606     LoadLibrary
1607     localtime_r
1608     mach_absolute_time
1609     MapViewOfFile
1610     memalign
1611     mkstemp
1612     mmap
1613     mprotect
1614     nanosleep
1615     posix_memalign
1616     sched_getaffinity
1617     SetConsoleTextAttribute
1618     setmode
1619     setrlimit
1620     Sleep
1621     strerror_r
1622     sysconf
1623     sysctl
1624     usleep
1625     VirtualAlloc
1626 "
1627
1628 TOOLCHAIN_FEATURES="
1629     as_dn_directive
1630     as_fpu_directive
1631     as_func
1632     as_object_arch
1633     asm_mod_q
1634     attribute_may_alias
1635     attribute_packed
1636     ebp_available
1637     ebx_available
1638     gnu_as
1639     ibm_asm
1640     inline_asm_labels
1641     pragma_deprecated
1642     symver_asm_label
1643     symver_gnu_asm
1644     vfp_args
1645     xform_asm
1646     xmm_clobbers
1647 "
1648
1649 TYPES_LIST="
1650     CONDITION_VARIABLE_Ptr
1651     socklen_t
1652     struct_addrinfo
1653     struct_group_source_req
1654     struct_ip_mreq_source
1655     struct_ipv6_mreq
1656     struct_pollfd
1657     struct_rusage_ru_maxrss
1658     struct_sockaddr_in6
1659     struct_sockaddr_sa_len
1660     struct_sockaddr_storage
1661     struct_v4l2_frmivalenum_discrete
1662 "
1663
1664 HAVE_LIST="
1665     $ARCH_EXT_LIST
1666     $(add_suffix _external $ARCH_EXT_LIST)
1667     $(add_suffix _inline   $ARCH_EXT_LIST)
1668     $ARCH_FEATURES
1669     $BUILTIN_LIST
1670     $HAVE_LIST_CMDLINE
1671     $HAVE_LIST_PUB
1672     $HEADERS_LIST
1673     $INTRINSICS_LIST
1674     $MATH_FUNCS
1675     $SYSTEM_FUNCS
1676     $THREADS_LIST
1677     $TOOLCHAIN_FEATURES
1678     $TYPES_LIST
1679     dos_paths
1680     dxva2_lib
1681     libc_msvcrt
1682     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1683     sdl
1684     section_data_rel_ro
1685     threads
1686     vaapi_drm
1687     vaapi_x11
1688     vdpau_x11
1689 "
1690
1691 # options emitted with CONFIG_ prefix but not available on the command line
1692 CONFIG_EXTRA="
1693     aandcttables
1694     ac3dsp
1695     audio_frame_queue
1696     audiodsp
1697     blockdsp
1698     bswapdsp
1699     cabac
1700     dirac_parse
1701     dvprofile
1702     faandct
1703     faanidct
1704     fdctdsp
1705     flacdsp
1706     fmtconvert
1707     g722dsp
1708     gmp
1709     golomb
1710     gplv3
1711     h263dsp
1712     h264chroma
1713     h264dsp
1714     h264parse
1715     h264pred
1716     h264qpel
1717     hevc_ps
1718     hpeldsp
1719     huffman
1720     huffyuvdsp
1721     huffyuvencdsp
1722     idctdsp
1723     iirfilter
1724     imdct15
1725     intrax8
1726     iso_media
1727     ividsp
1728     jpegtables
1729     libx262
1730     lgplv3
1731     lpc
1732     lzf
1733     me_cmp
1734     mpeg_er
1735     mpegaudio
1736     mpegaudiodsp
1737     mpegaudioheader
1738     mpegvideo
1739     mpegvideoenc
1740     mss34dsp
1741     pixblockdsp
1742     qpeldsp
1743     qsv
1744     qsvdec
1745     qsvenc
1746     rangecoder
1747     riffdec
1748     riffenc
1749     rtpdec
1750     rtpenc_chain
1751     rv34dsp
1752     sinewin
1753     snappy
1754     srtp
1755     startcode
1756     texturedsp
1757     texturedspenc
1758     tpeldsp
1759     vaapi_encode
1760     vc1dsp
1761     videodsp
1762     vp3dsp
1763     vp56dsp
1764     vp8dsp
1765     wma_freqs
1766     wmv2dsp
1767 "
1768
1769 CMDLINE_SELECT="
1770     $ARCH_EXT_LIST
1771     $CONFIG_LIST
1772     $HAVE_LIST_CMDLINE
1773     $THREADS_LIST
1774     asm
1775     cross_compile
1776     debug
1777     extra_warnings
1778     logging
1779     lto
1780     optimizations
1781     rpath
1782 "
1783
1784 PATHS_LIST="
1785     bindir
1786     datadir
1787     docdir
1788     incdir
1789     libdir
1790     mandir
1791     prefix
1792     shlibdir
1793 "
1794
1795 CMDLINE_SET="
1796     $PATHS_LIST
1797     ar
1798     arch
1799     as
1800     cc
1801     objcc
1802     cpu
1803     cross_prefix
1804     custom_allocator
1805     dep_cc
1806     env
1807     extra_version
1808     host_cc
1809     host_cflags
1810     host_extralibs
1811     host_ld
1812     host_ldflags
1813     host_os
1814     ld
1815     logfile
1816     malloc_prefix
1817     nm
1818     optflags
1819     pkg_config
1820     pkg_config_flags
1821     random_seed
1822     samples
1823     sysinclude
1824     sysroot
1825     target_exec
1826     target_os
1827     target_path
1828     target_samples
1829     toolchain
1830 "
1831
1832 CMDLINE_APPEND="
1833     extra_cflags
1834     extra_objcflags
1835     host_cppflags
1836 "
1837
1838 # code dependency declarations
1839
1840 # architecture extensions
1841
1842 armv5te_deps="arm"
1843 armv6_deps="arm"
1844 armv6t2_deps="arm"
1845 armv8_deps="aarch64"
1846 neon_deps_any="aarch64 arm"
1847 intrinsics_neon_deps="neon"
1848 vfp_deps_any="aarch64 arm"
1849 vfpv3_deps="vfp"
1850
1851 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1852
1853 altivec_deps="ppc"
1854 ppc4xx_deps="ppc"
1855 vsx_deps="altivec"
1856 power8_deps="vsx"
1857
1858 cpunop_deps="i686"
1859 x86_64_select="i686"
1860 x86_64_suggest="fast_cmov"
1861
1862 amd3dnow_deps="mmx"
1863 amd3dnowext_deps="amd3dnow"
1864 i686_deps="x86"
1865 mmx_deps="x86"
1866 mmxext_deps="mmx"
1867 sse_deps="mmxext"
1868 sse2_deps="sse"
1869 sse3_deps="sse2"
1870 ssse3_deps="sse3"
1871 sse4_deps="ssse3"
1872 sse42_deps="sse4"
1873 avx_deps="sse42"
1874 xop_deps="avx"
1875 fma3_deps="avx"
1876 fma4_deps="avx"
1877 avx2_deps="avx"
1878
1879 mmx_external_deps="yasm"
1880 mmx_inline_deps="inline_asm"
1881 mmx_suggest="mmx_external mmx_inline"
1882
1883 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1884     eval dep=\$${ext}_deps
1885     eval ${ext}_external_deps='"${dep}_external"'
1886     eval ${ext}_inline_deps='"${dep}_inline"'
1887     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1888 done
1889
1890 aligned_stack_if_any="aarch64 ppc x86"
1891 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1892 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1893 fast_unaligned_if_any="aarch64 ppc x86"
1894 simd_align_16_if_any="altivec neon sse"
1895 simd_align_32_if_any="avx"
1896
1897 # system capabilities
1898 symver_if_any="symver_asm_label symver_gnu_asm"
1899 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1900
1901 # threading support
1902 atomics_gcc_if="sync_val_compare_and_swap"
1903 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1904 atomics_win32_if="MemoryBarrier"
1905 atomics_native_if_any="$ATOMICS_LIST"
1906 w32threads_deps="atomics_native"
1907 threads_if_any="$THREADS_LIST"
1908
1909 # subsystems
1910 dct_select="rdft"
1911 dirac_parse_select="golomb"
1912 error_resilience_select="me_cmp"
1913 faandct_deps="faan fdctdsp"
1914 faanidct_deps="faan idctdsp"
1915 h264dsp_select="startcode"
1916 hevc_ps_select="golomb"
1917 intrax8_select="blockdsp idctdsp"
1918 mdct_select="fft"
1919 rdft_select="fft"
1920 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1921 mpeg_er_select="error_resilience"
1922 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1923 mpegaudiodsp_select="dct"
1924 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1925 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1926 vc1dsp_select="h264chroma qpeldsp startcode"
1927
1928 # decoders / encoders
1929 aac_decoder_select="imdct15 mdct sinewin"
1930 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1931 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1932 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1933 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1934 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1935 adpcm_g722_decoder_select="g722dsp"
1936 adpcm_g722_encoder_select="g722dsp"
1937 aic_decoder_select="golomb idctdsp"
1938 alac_encoder_select="lpc"
1939 als_decoder_select="bswapdsp"
1940 amrnb_decoder_select="lsp"
1941 amrwb_decoder_select="lsp"
1942 amv_decoder_select="sp5x_decoder"
1943 ape_decoder_select="bswapdsp"
1944 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1945 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1946 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1947 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1948 atrac1_decoder_select="mdct sinewin"
1949 atrac3_decoder_select="mdct"
1950 atrac3p_decoder_select="mdct sinewin"
1951 bink_decoder_select="blockdsp hpeldsp"
1952 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1953 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1954 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1955 cllc_decoder_select="bswapdsp"
1956 comfortnoise_encoder_select="lpc"
1957 cook_decoder_select="audiodsp mdct sinewin"
1958 cscd_decoder_select="lzo"
1959 cscd_decoder_suggest="zlib"
1960 dca_decoder_select="fmtconvert mdct"
1961 dds_decoder_select="texturedsp"
1962 dnxhd_decoder_select="blockdsp idctdsp"
1963 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1964 dvvideo_decoder_select="dvprofile idctdsp"
1965 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1966 dxa_decoder_deps="zlib"
1967 dxv_decoder_select="lzf texturedsp"
1968 eac3_decoder_select="ac3_decoder"
1969 eac3_encoder_select="ac3_encoder"
1970 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1971 eatgq_decoder_select="aandcttables idctdsp"
1972 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1973 exr_decoder_deps="zlib"
1974 ffv1_decoder_select="rangecoder"
1975 ffv1_encoder_select="rangecoder"
1976 ffvhuff_decoder_select="huffyuv_decoder"
1977 ffvhuff_encoder_select="huffyuv_encoder"
1978 fic_decoder_select="golomb"
1979 flac_decoder_select="flacdsp"
1980 flac_encoder_select="bswapdsp flacdsp lpc"
1981 flashsv_decoder_deps="zlib"
1982 flashsv_encoder_deps="zlib"
1983 flashsv2_decoder_deps="zlib"
1984 flv_decoder_select="h263_decoder"
1985 flv_encoder_select="h263_encoder"
1986 fourxm_decoder_select="blockdsp bswapdsp"
1987 fraps_decoder_select="bswapdsp huffman"
1988 g2m_decoder_deps="zlib"
1989 g2m_decoder_select="blockdsp idctdsp jpegtables"
1990 h261_decoder_select="mpeg_er mpegvideo"
1991 h261_encoder_select="aandcttables mpegvideoenc"
1992 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1993 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1994 h263i_decoder_select="h263_decoder"
1995 h263p_encoder_select="h263_encoder"
1996 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
1997 h264_decoder_suggest="error_resilience"
1998 hap_decoder_select="snappy texturedsp"
1999 hap_encoder_deps="libsnappy"
2000 hap_encoder_select="texturedspenc"
2001 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2002 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2003 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2004 iac_decoder_select="imc_decoder"
2005 imc_decoder_select="bswapdsp fft mdct sinewin"
2006 indeo3_decoder_select="hpeldsp"
2007 indeo4_decoder_select="ividsp"
2008 indeo5_decoder_select="ividsp"
2009 interplay_video_decoder_select="hpeldsp"
2010 jpegls_decoder_select="mjpeg_decoder"
2011 jv_decoder_select="blockdsp"
2012 lagarith_decoder_select="huffyuvdsp"
2013 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2014 magicyuv_decoder_select="huffyuvdsp"
2015 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2016 metasound_decoder_select="lsp mdct sinewin"
2017 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2018 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2019 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2020 mjpegb_decoder_select="mjpeg_decoder"
2021 mlp_decoder_select="mlp_parser"
2022 motionpixels_decoder_select="bswapdsp"
2023 mp1_decoder_select="mpegaudio"
2024 mp1float_decoder_select="mpegaudio"
2025 mp2_decoder_select="mpegaudio"
2026 mp2float_decoder_select="mpegaudio"
2027 mp3_decoder_select="mpegaudio"
2028 mp3adu_decoder_select="mpegaudio"
2029 mp3adufloat_decoder_select="mpegaudio"
2030 mp3float_decoder_select="mpegaudio"
2031 mp3on4_decoder_select="mpegaudio"
2032 mp3on4float_decoder_select="mpegaudio"
2033 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2034 mpc8_decoder_select="mpegaudiodsp"
2035 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2036 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2037 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2038 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2039 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2040 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2041 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2042 mpeg4_encoder_select="h263_encoder"
2043 msa1_decoder_select="mss34dsp"
2044 msmpeg4v1_decoder_select="h263_decoder"
2045 msmpeg4v2_decoder_select="h263_decoder"
2046 msmpeg4v2_encoder_select="h263_encoder"
2047 msmpeg4v3_decoder_select="h263_decoder"
2048 msmpeg4v3_encoder_select="h263_encoder"
2049 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2050 mts2_decoder_select="mss34dsp"
2051 mxpeg_decoder_select="mjpeg_decoder"
2052 nellymoser_decoder_select="mdct sinewin"
2053 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2054 nuv_decoder_select="idctdsp lzo"
2055 on2avc_decoder_select="mdct"
2056 opus_decoder_deps="avresample"
2057 opus_decoder_select="imdct15"
2058 png_decoder_deps="zlib"
2059 png_encoder_deps="zlib"
2060 png_encoder_select="huffyuvencdsp"
2061 prores_decoder_select="idctdsp"
2062 prores_encoder_select="fdctdsp"
2063 qcelp_decoder_select="lsp"
2064 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2065 ra_144_encoder_select="audio_frame_queue lpc"
2066 ralf_decoder_select="golomb"
2067 rscc_decoder_deps="zlib"
2068 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2069 rv10_encoder_select="h263_encoder"
2070 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2071 rv20_encoder_select="h263_encoder"
2072 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2073 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2074 screenpresso_decoder_deps="zlib"
2075 sipr_decoder_select="lsp"
2076 sp5x_decoder_select="mjpeg_decoder"
2077 svq1_decoder_select="hpeldsp"
2078 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2079 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2080 svq3_decoder_suggest="zlib"
2081 tak_decoder_select="audiodsp"
2082 tdsc_decoder_deps="zlib"
2083 tdsc_decoder_select="mjpeg_decoder"
2084 theora_decoder_select="vp3_decoder"
2085 thp_decoder_select="mjpeg_decoder"
2086 tiff_decoder_suggest="zlib"
2087 tiff_encoder_suggest="zlib"
2088 truehd_decoder_select="mlp_decoder"
2089 truemotion2_decoder_select="bswapdsp"
2090 truespeech_decoder_select="bswapdsp"
2091 tscc_decoder_deps="zlib"
2092 txd_decoder_select="texturedsp"
2093 twinvq_decoder_select="mdct lsp sinewin"
2094 utvideo_decoder_select="bswapdsp"
2095 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2096 vble_decoder_select="huffyuvdsp"
2097 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2098 vc1image_decoder_select="vc1_decoder"
2099 vorbis_decoder_select="mdct"
2100 vorbis_encoder_select="mdct"
2101 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2102 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2103 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2104 vp6a_decoder_select="vp6_decoder"
2105 vp6f_decoder_select="vp6_decoder"
2106 vp7_decoder_select="h264pred videodsp vp8dsp"
2107 vp8_decoder_select="h264pred videodsp vp8dsp"
2108 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2109 webp_decoder_select="vp8_decoder"
2110 wmapro_decoder_select="mdct sinewin wma_freqs"
2111 wmav1_decoder_select="mdct sinewin wma_freqs"
2112 wmav1_encoder_select="mdct sinewin wma_freqs"
2113 wmav2_decoder_select="mdct sinewin wma_freqs"
2114 wmav2_encoder_select="mdct sinewin wma_freqs"
2115 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2116 wmv1_decoder_select="h263_decoder"
2117 wmv1_encoder_select="h263_encoder"
2118 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2119 wmv2_encoder_select="h263_encoder wmv2dsp"
2120 wmv3_decoder_select="vc1_decoder"
2121 wmv3image_decoder_select="wmv3_decoder"
2122 zerocodec_decoder_deps="zlib"
2123 zlib_decoder_deps="zlib"
2124 zlib_encoder_deps="zlib"
2125 zmbv_decoder_deps="zlib"
2126 zmbv_encoder_deps="zlib"
2127
2128 # hardware accelerators
2129 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2130 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2131 dxva2_lib_deps="dxva2"
2132 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2133 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2134
2135 h263_vaapi_hwaccel_deps="vaapi"
2136 h263_vaapi_hwaccel_select="h263_decoder"
2137 h264_d3d11va_hwaccel_deps="d3d11va"
2138 h264_d3d11va_hwaccel_select="h264_decoder"
2139 h264_dxva2_hwaccel_deps="dxva2"
2140 h264_dxva2_hwaccel_select="h264_decoder"
2141 h264_mmal_hwaccel_deps="mmal"
2142 h264_qsv_hwaccel_deps="libmfx"
2143 h264_vaapi_hwaccel_deps="vaapi"
2144 h264_vaapi_hwaccel_select="h264_decoder"
2145 h264_vda_hwaccel_deps="vda"
2146 h264_vda_hwaccel_select="h264_decoder"
2147 h264_vda_old_hwaccel_deps="vda"
2148 h264_vda_old_hwaccel_select="h264_decoder"
2149 h264_vdpau_hwaccel_deps="vdpau"
2150 h264_vdpau_hwaccel_select="h264_decoder"
2151 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2152 hevc_d3d11va_hwaccel_select="hevc_decoder"
2153 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2154 hevc_dxva2_hwaccel_select="hevc_decoder"
2155 hevc_qsv_hwaccel_deps="libmfx"
2156 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2157 hevc_vdpau_hwaccel_select="hevc_decoder"
2158 mpeg1_vdpau_hwaccel_deps="vdpau"
2159 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2160 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2161 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2162 mpeg2_dxva2_hwaccel_deps="dxva2"
2163 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2164 mpeg2_mmal_hwaccel_deps="mmal"
2165 mpeg2_qsv_hwaccel_deps="libmfx"
2166 mpeg2_vaapi_hwaccel_deps="vaapi"
2167 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2168 mpeg2_vdpau_hwaccel_deps="vdpau"
2169 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2170 mpeg4_vaapi_hwaccel_deps="vaapi"
2171 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2172 mpeg4_vdpau_hwaccel_deps="vdpau"
2173 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2174 vc1_d3d11va_hwaccel_deps="d3d11va"
2175 vc1_d3d11va_hwaccel_select="vc1_decoder"
2176 vc1_dxva2_hwaccel_deps="dxva2"
2177 vc1_dxva2_hwaccel_select="vc1_decoder"
2178 vc1_mmal_hwaccel_deps="mmal"
2179 vc1_qsv_hwaccel_deps="libmfx"
2180 vc1_vaapi_hwaccel_deps="vaapi"
2181 vc1_vaapi_hwaccel_select="vc1_decoder"
2182 vc1_vdpau_hwaccel_deps="vdpau"
2183 vc1_vdpau_hwaccel_select="vc1_decoder"
2184 vp8_qsv_hwaccel_deps="libmfx"
2185 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2186 vp8_vaapi_hwaccel_select="vp8_decoder"
2187 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2188 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2189 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2190 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2191
2192 # hardware-accelerated codecs
2193 nvenc_deps_any="dlopen LoadLibrary"
2194 nvenc_extralibs='$ldl'
2195 omx_deps="dlopen pthreads"
2196 omx_extralibs='$ldl'
2197 omx_rpi_select="omx"
2198 qsvdec_select="qsv"
2199 qsvenc_select="qsv"
2200 vaapi_encode_deps="vaapi"
2201
2202 hwupload_cuda_filter_deps="cuda"
2203 scale_npp_filter_deps="cuda libnpp"
2204
2205 h264_mmal_decoder_deps="mmal"
2206 h264_nvenc_encoder_deps="nvenc"
2207 h264_omx_encoder_deps="omx"
2208 h264_qsv_decoder_deps="libmfx"
2209 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2210 h264_qsv_encoder_deps="libmfx"
2211 h264_qsv_encoder_select="qsvenc"
2212 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2213 h264_vaapi_encoder_select="vaapi_encode golomb"
2214 hevc_nvenc_encoder_deps="nvenc"
2215 hevc_qsv_decoder_deps="libmfx"
2216 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2217 hevc_qsv_encoder_deps="libmfx"
2218 hevc_qsv_encoder_select="hevc_ps qsvenc"
2219 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2220 hevc_vaapi_encoder_select="vaapi_encode golomb"
2221 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2222 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2223 mpeg2_mmal_decoder_deps="mmal"
2224 mpeg2_qsv_decoder_deps="libmfx"
2225 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2226 mpeg2_qsv_encoder_deps="libmfx"
2227 mpeg2_qsv_encoder_select="qsvenc"
2228 mpeg4_omx_encoder_deps="omx"
2229 vc1_mmal_decoder_deps="mmal"
2230 vc1_qsv_decoder_deps="libmfx"
2231 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2232 vp8_qsv_decoder_deps="libmfx"
2233 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2234
2235 nvenc_h264_encoder_select="h264_nvenc_encoder"
2236 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2237
2238 # parsers
2239 h264_parser_select="golomb h264dsp h264parse"
2240 hevc_parser_select="hevc_ps"
2241 mpegaudio_parser_select="mpegaudioheader"
2242 mpegvideo_parser_select="mpegvideo"
2243 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2244 vc1_parser_select="vc1dsp"
2245
2246 # bitstream_filters
2247 mjpeg2jpeg_bsf_select="jpegtables"
2248
2249 # external libraries
2250 avisynth_deps="LoadLibrary"
2251 avxsynth_deps="dlopen"
2252 avisynth_demuxer_deps_any="avisynth avxsynth"
2253 avisynth_demuxer_select="riffdec"
2254 libdcadec_decoder_deps="libdcadec"
2255 libfaac_encoder_deps="libfaac"
2256 libfaac_encoder_select="audio_frame_queue"
2257 libfdk_aac_decoder_deps="libfdk_aac"
2258 libfdk_aac_encoder_deps="libfdk_aac"
2259 libfdk_aac_encoder_select="audio_frame_queue"
2260 libgsm_decoder_deps="libgsm"
2261 libgsm_encoder_deps="libgsm"
2262 libgsm_ms_decoder_deps="libgsm"
2263 libgsm_ms_encoder_deps="libgsm"
2264 libilbc_decoder_deps="libilbc"
2265 libilbc_encoder_deps="libilbc"
2266 libkvazaar_encoder_deps="libkvazaar"
2267 libmp3lame_encoder_deps="libmp3lame"
2268 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2269 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2270 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2271 libopencore_amrnb_encoder_select="audio_frame_queue"
2272 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2273 libopenh264_decoder_deps="libopenh264"
2274 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2275 libopenh264_encoder_deps="libopenh264"
2276 libopenjpeg_decoder_deps="libopenjpeg"
2277 libopenjpeg_encoder_deps="libopenjpeg"
2278 libopus_decoder_deps="libopus"
2279 libopus_encoder_deps="libopus"
2280 libopus_encoder_select="audio_frame_queue"
2281 libschroedinger_decoder_deps="libschroedinger"
2282 libschroedinger_encoder_deps="libschroedinger"
2283 libspeex_decoder_deps="libspeex"
2284 libspeex_encoder_deps="libspeex"
2285 libspeex_encoder_select="audio_frame_queue"
2286 libtheora_encoder_deps="libtheora"
2287 libtwolame_encoder_deps="libtwolame"
2288 libvo_aacenc_encoder_deps="libvo_aacenc"
2289 libvo_aacenc_encoder_select="audio_frame_queue"
2290 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2291 libvorbis_encoder_deps="libvorbis"
2292 libvorbis_encoder_select="audio_frame_queue"
2293 libvpx_vp8_decoder_deps="libvpx"
2294 libvpx_vp8_encoder_deps="libvpx"
2295 libvpx_vp9_decoder_deps="libvpx"
2296 libvpx_vp9_encoder_deps="libvpx"
2297 libwavpack_encoder_deps="libwavpack"
2298 libwavpack_encoder_select="audio_frame_queue"
2299 libwebp_encoder_deps="libwebp"
2300 libx262_encoder_deps="libx262"
2301 libx264_encoder_deps="libx264"
2302 libx265_encoder_deps="libx265"
2303 libxavs_encoder_deps="libxavs"
2304 libxvid_encoder_deps="libxvid mkstemp"
2305
2306 # demuxers / muxers
2307 ac3_demuxer_select="ac3_parser"
2308 asf_demuxer_select="riffdec"
2309 asf_muxer_select="riffenc"
2310 asf_stream_muxer_select="asf_muxer"
2311 avi_demuxer_select="iso_media riffdec"
2312 avi_muxer_select="riffenc"
2313 caf_demuxer_select="iso_media riffdec"
2314 dash_muxer_select="mp4_muxer"
2315 dirac_demuxer_select="dirac_parser"
2316 dv_demuxer_select="dvprofile"
2317 dv_muxer_select="dvprofile"
2318 dxa_demuxer_select="riffdec"
2319 eac3_demuxer_select="ac3_parser"
2320 f4v_muxer_select="mov_muxer"
2321 flac_demuxer_select="flac_parser"
2322 hds_muxer_select="flv_muxer"
2323 hls_muxer_select="mpegts_muxer"
2324 ipod_muxer_select="mov_muxer"
2325 ismv_muxer_select="mov_muxer"
2326 matroska_audio_muxer_select="matroska_muxer"
2327 matroska_demuxer_select="iso_media riffdec"
2328 matroska_demuxer_suggest="bzlib lzo zlib"
2329 matroska_muxer_select="iso_media riffenc"
2330 mmf_muxer_select="riffenc"
2331 mov_demuxer_select="iso_media riffdec"
2332 mov_demuxer_suggest="zlib"
2333 mov_muxer_select="iso_media riffenc rtpenc_chain"
2334 mp3_demuxer_select="mpegaudio_parser"
2335 mp3_muxer_select="mpegaudioheader"
2336 mp4_muxer_select="mov_muxer"
2337 mpegts_demuxer_select="iso_media"
2338 mpegts_muxer_select="adts_muxer latm_muxer"
2339 mpegtsraw_demuxer_select="mpegts_demuxer"
2340 mxf_d10_muxer_select="mxf_muxer"
2341 nut_muxer_select="riffenc"
2342 nuv_demuxer_select="riffdec"
2343 oga_muxer_select="ogg_muxer"
2344 ogg_demuxer_select="dirac_parse"
2345 opus_muxer_select="ogg_muxer"
2346 psp_muxer_select="mov_muxer"
2347 rtp_demuxer_select="sdp_demuxer"
2348 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2349 rtsp_demuxer_select="http_protocol rtpdec"
2350 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2351 sap_demuxer_select="sdp_demuxer"
2352 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2353 sdp_demuxer_select="rtpdec"
2354 smoothstreaming_muxer_select="ismv_muxer"
2355 spdif_muxer_select="aac_parser"
2356 spx_muxer_select="ogg_muxer"
2357 swf_demuxer_suggest="zlib"
2358 tak_demuxer_select="tak_parser"
2359 tg2_muxer_select="mov_muxer"
2360 tgp_muxer_select="mov_muxer"
2361 w64_demuxer_select="wav_demuxer"
2362 wav_demuxer_select="riffdec"
2363 wav_muxer_select="riffenc"
2364 webm_muxer_select="iso_media riffenc"
2365 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2366 wtv_demuxer_select="mpegts_demuxer riffdec"
2367 xmv_demuxer_select="riffdec"
2368 xwma_demuxer_select="riffdec"
2369
2370 # indevs / outdevs
2371 alsa_indev_deps="alsa"
2372 alsa_outdev_deps="alsa"
2373 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2374 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2375 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2376 dv1394_indev_deps="dv1394"
2377 dv1394_indev_select="dv_demuxer"
2378 fbdev_indev_deps="linux_fb_h"
2379 jack_indev_deps="jack"
2380 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2381 libcdio_indev_deps="libcdio"
2382 libdc1394_indev_deps="libdc1394"
2383 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2384 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2385 pulse_indev_deps="libpulse"
2386 sndio_indev_deps="sndio"
2387 sndio_outdev_deps="sndio"
2388 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2389 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2390 xcbgrab_indev_deps="libxcb"
2391
2392 # protocols
2393 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2394 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2395 ffrtmpcrypt_protocol_select="tcp_protocol"
2396 ffrtmphttp_protocol_deps="!librtmp_protocol"
2397 ffrtmphttp_protocol_select="http_protocol"
2398 gopher_protocol_select="network"
2399 http_protocol_select="tcp_protocol"
2400 httpproxy_protocol_select="tcp_protocol"
2401 https_protocol_select="tls_protocol"
2402 icecast_protocol_select="http_protocol"
2403 librtmp_protocol_deps="librtmp"
2404 librtmpe_protocol_deps="librtmp"
2405 librtmps_protocol_deps="librtmp"
2406 librtmpt_protocol_deps="librtmp"
2407 librtmpte_protocol_deps="librtmp"
2408 mmsh_protocol_select="http_protocol"
2409 mmst_protocol_select="network"
2410 rtmp_protocol_deps="!librtmp_protocol"
2411 rtmp_protocol_select="tcp_protocol"
2412 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2413 rtmps_protocol_deps="!librtmp_protocol"
2414 rtmps_protocol_select="tls_protocol"
2415 rtmpt_protocol_select="ffrtmphttp_protocol"
2416 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2417 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2418 rtp_protocol_select="udp_protocol"
2419 sctp_protocol_deps="struct_sctp_event_subscribe"
2420 sctp_protocol_select="network"
2421 srtp_protocol_select="rtp_protocol srtp"
2422 tcp_protocol_select="network"
2423 tls_gnutls_protocol_deps="gnutls"
2424 tls_gnutls_protocol_select="tcp_protocol"
2425 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2426 tls_openssl_protocol_select="tcp_protocol"
2427 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2428 udp_protocol_select="network"
2429 unix_protocol_deps="sys_un_h"
2430 unix_protocol_select="network"
2431
2432 # filters
2433 asyncts_filter_deps="avresample"
2434 blackframe_filter_deps="gpl"
2435 boxblur_filter_deps="gpl"
2436 bs2b_filter_deps="libbs2b"
2437 cropdetect_filter_deps="gpl"
2438 deinterlace_qsv_filter_deps="libmfx"
2439 deinterlace_vaapi_filter_deps="vaapi"
2440 delogo_filter_deps="gpl"
2441 drawtext_filter_deps="libfreetype"
2442 frei0r_filter_deps="frei0r dlopen"
2443 frei0r_filter_extralibs='$ldl'
2444 frei0r_src_filter_deps="frei0r dlopen"
2445 frei0r_src_filter_extralibs='$ldl'
2446 hdcd_filter_deps="libhdcd"
2447 hqdn3d_filter_deps="gpl"
2448 interlace_filter_deps="gpl"
2449 movie_filter_deps="avcodec avformat"
2450 ocv_filter_deps="libopencv"
2451 resample_filter_deps="avresample"
2452 scale_filter_deps="swscale"
2453 scale_qsv_filter_deps="libmfx"
2454 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2455
2456 # examples
2457 decode_audio_example_deps="avcodec avutil"
2458 decode_video_example_deps="avcodec avutil"
2459 encode_audio_example_deps="avcodec avutil"
2460 encode_video_example_deps="avcodec avutil"
2461 filter_audio_example_deps="avfilter avutil"
2462 metadata_example_deps="avformat avutil"
2463 output_example_deps="avcodec avformat avresample avutil swscale"
2464 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2465 transcode_aac_example_deps="avcodec avformat avresample"
2466
2467 # libraries, in linking order
2468 avcodec_deps="avutil"
2469 avcodec_select="null_bsf"
2470 avdevice_deps="avformat avcodec avutil"
2471 avfilter_deps="avutil"
2472 avformat_deps="avcodec avutil"
2473 avresample_deps="avutil"
2474 swscale_deps="avutil"
2475
2476 # programs
2477 avconv_deps="avcodec avfilter avformat avresample swscale"
2478 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2479                fps_filter null_filter resample_filter scale_filter
2480                trim_filter"
2481 avplay_deps="avcodec avfilter avformat avresample sdl"
2482 avplay_extralibs='$sdl_extralibs'
2483 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2484 avprobe_deps="avcodec avformat"
2485
2486 # documentation
2487 pod2man_deps="doc"
2488 texi2html_deps="doc"
2489
2490 # default parameters
2491
2492 logfile="config.log"
2493
2494 # installation paths
2495 prefix_default="/usr/local"
2496 bindir_default='${prefix}/bin'
2497 datadir_default='${prefix}/share/avconv'
2498 docdir_default='${prefix}/share/doc/libav'
2499 incdir_default='${prefix}/include'
2500 libdir_default='${prefix}/lib'
2501 mandir_default='${prefix}/share/man'
2502 shlibdir_default="$libdir_default"
2503
2504 # toolchain
2505 ar_default="ar"
2506 cc_default="gcc"
2507 host_cc_default="gcc"
2508 ln_s="ln -s -f"
2509 nm_default="nm -g"
2510 objformat="elf"
2511 pkg_config_default=pkg-config
2512 ranlib="ranlib"
2513 strip="strip"
2514 version_script='--version-script'
2515 yasmexe="yasm"
2516
2517 # machine
2518 arch_default=$(uname -m)
2519 cpu="generic"
2520 intrinsics="none"
2521
2522 # OS
2523 target_os_default=$(tolower $(uname -s))
2524 host_os=$target_os_default
2525
2526 # configurable options
2527 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2528
2529 enable asm
2530 enable debug
2531 enable doc
2532 enable faan faandct faanidct
2533 enable optimizations
2534 enable safe_bitstream_reader
2535 enable static
2536 enable swscale_alpha
2537 enable valgrind_backtrace
2538
2539 # By default, enable only those hwaccels that have no external dependencies.
2540 enable d3d11va dxva2 vda vdpau
2541
2542 # build settings
2543 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2544 LIBPREF="lib"
2545 LIBSUF=".a"
2546 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2547 SLIBPREF="lib"
2548 SLIBSUF=".so"
2549 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2550 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2551 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2552 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2553 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2554 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2555 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2556
2557 asflags_filter=echo
2558 cflags_filter=echo
2559 ldflags_filter=echo
2560
2561 AS_C='-c'
2562 AS_O='-o $@'
2563 CC_C='-c'
2564 CC_E='-E -o $@'
2565 CC_O='-o $@'
2566 OBJCC_C='-c'
2567 OBJCC_E='-E -o $@'
2568 OBJCC_O='-o $@'
2569 LD_O='-o $@'
2570 LD_LIB='-l%'
2571 LD_PATH='-L'
2572 HOSTCC_C='-c'
2573 HOSTCC_E='-E -o $@'
2574 HOSTCC_O='-o $@'
2575 HOSTLD_O='-o $@'
2576
2577 host_extralibs='-lm'
2578 host_cflags_filter=echo
2579 host_ldflags_filter=echo
2580
2581 target_path='$(CURDIR)'
2582
2583 # since the object filename is not given with the -MM flag, the compiler
2584 # is only able to print the basename, and we must add the path ourselves
2585 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2586 DEPFLAGS='-MM'
2587
2588 # find source path
2589 if test -f configure; then
2590     source_path=.
2591 else
2592     source_path=$(cd $(dirname "$0"); pwd)
2593     echo "$source_path" | grep -q '[[:blank:]]' &&
2594         die "Out of tree builds are impossible with whitespace in source path."
2595     test -e "$source_path/config.h" &&
2596         die "Out of tree builds are impossible with config.h in source dir."
2597 fi
2598
2599 for v in "$@"; do
2600     r=${v#*=}
2601     l=${v%"$r"}
2602     r=$(sh_quote "$r")
2603     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2604 done
2605
2606 find_things(){
2607     thing=$1
2608     pattern=$2
2609     file=$source_path/$3
2610     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2611 }
2612
2613 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2614 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2615 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2616 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2617 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2618 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2619 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2620 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2621 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2622
2623 find_things_extern(){
2624     thing=$1
2625     pattern=$2
2626     file=$source_path/$3
2627     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2628 }
2629
2630 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2631 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2632
2633 ALL_COMPONENTS="
2634     $BSF_LIST
2635     $DECODER_LIST
2636     $DEMUXER_LIST
2637     $ENCODER_LIST
2638     $FILTER_LIST
2639     $HWACCEL_LIST
2640     $INDEV_LIST
2641     $MUXER_LIST
2642     $OUTDEV_LIST
2643     $PARSER_LIST
2644     $PROTOCOL_LIST
2645 "
2646
2647 for n in $COMPONENT_LIST; do
2648     v=$(toupper ${n%s})_LIST
2649     eval enable \$$v
2650     eval ${n}_if_any="\$$v"
2651 done
2652
2653 enable $ARCH_EXT_LIST
2654
2655 die_unknown(){
2656     echo "Unknown option \"$1\"."
2657     echo "See $0 --help for available options."
2658     exit 1
2659 }
2660
2661 print_3_columns() {
2662     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2663 }
2664
2665 show_list() {
2666     suffix=_$1
2667     shift
2668     echo $* | sed s/$suffix//g | print_3_columns
2669     exit 0
2670 }
2671
2672 rand_list(){
2673     IFS=', '
2674     set -- $*
2675     unset IFS
2676     for thing; do
2677         comp=${thing%:*}
2678         prob=${thing#$comp}
2679         prob=${prob#:}
2680         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2681         echo "prob ${prob:-0.5}"
2682         printf '%s\n' $comp
2683     done
2684 }
2685
2686 do_random(){
2687     action=$1
2688     shift
2689     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2690     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2691 }
2692
2693 for opt do
2694     optval="${opt#*=}"
2695     case "$opt" in
2696         --extra-ldflags=*)
2697             add_ldflags $optval
2698         ;;
2699         --extra-ldexeflags=*)
2700             add_ldexeflags $optval
2701         ;;
2702         --extra-libs=*)
2703             add_extralibs $optval
2704         ;;
2705         --disable-devices)
2706             disable $INDEV_LIST $OUTDEV_LIST
2707         ;;
2708         --enable-debug=*)
2709             debuglevel="$optval"
2710         ;;
2711         --disable-programs)
2712             disable $PROGRAM_LIST
2713         ;;
2714         --disable-everything)
2715             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2716         ;;
2717         --disable-all)
2718             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2719             disable $LIBRARY_LIST $PROGRAM_LIST doc
2720         ;;
2721         --enable-random|--disable-random)
2722             action=${opt%%-random}
2723             do_random ${action#--} $COMPONENT_LIST
2724         ;;
2725         --enable-random=*|--disable-random=*)
2726             action=${opt%%-random=*}
2727             do_random ${action#--} $optval
2728         ;;
2729         --enable-*=*|--disable-*=*)
2730             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2731             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2732             eval list=\$$(toupper $thing)_LIST
2733             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2734             $action $(filter "$name" $list)
2735         ;;
2736         --enable-avserver|--disable-avserver*)
2737             warn "avserver has been removed, the ${opt} option is only"\
2738                  "provided for compatibility and will be removed in the future"
2739         ;;
2740         --enable-?*|--disable-?*)
2741             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2742             if is_in $option $COMPONENT_LIST; then
2743                 test $action = disable && action=unset
2744                 eval $action \$$(toupper ${option%s})_LIST
2745             elif is_in $option $CMDLINE_SELECT; then
2746                 $action $option
2747             else
2748                 die_unknown $opt
2749             fi
2750         ;;
2751         --list-*)
2752             NAME="${opt#--list-}"
2753             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2754             NAME=${NAME%s}
2755             eval show_list $NAME \$$(toupper $NAME)_LIST
2756         ;;
2757         --help|-h) show_help
2758         ;;
2759         --quiet|-q) quiet=yes
2760         ;;
2761         *)
2762             optname="${opt%%=*}"
2763             optname="${optname#--}"
2764             optname=$(echo "$optname" | sed 's/-/_/g')
2765             if is_in $optname $CMDLINE_SET; then
2766                 eval $optname='$optval'
2767             elif is_in $optname $CMDLINE_APPEND; then
2768                 append $optname "$optval"
2769             else
2770                 die_unknown $opt
2771             fi
2772         ;;
2773     esac
2774 done
2775
2776 for e in $env; do
2777     eval "export $e"
2778 done
2779
2780 disabled logging && logfile=/dev/null
2781
2782 # Die early if licensing-related configure options are incompatible.
2783 die_license_disabled() {
2784     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2785 }
2786
2787 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2788 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2789 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2790
2791 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2792
2793 # Disable all the library-specific components if the library itself
2794 # is disabled, see AVCODEC_LIST and following _LIST variables.
2795
2796 disable_components(){
2797     disabled ${1} && disable $(
2798         eval components="\$$(toupper ${1})_COMPONENTS"
2799         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2800     )
2801 }
2802
2803 map 'disable_components $v' $LIBRARY_LIST
2804
2805 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2806 set >> $logfile
2807
2808 case "$toolchain" in
2809     *-asan)
2810         cc_default="${toolchain%-asan}"
2811         add_cflags  -fsanitize=address
2812         add_ldflags -fsanitize=address
2813     ;;
2814     *-msan)
2815         cc_default="${toolchain%-msan}"
2816         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2817         add_ldflags -fsanitize=memory
2818     ;;
2819     *-tsan)
2820         cc_default="${toolchain%-tsan}"
2821         add_cflags  -fsanitize=thread -fPIE
2822         add_ldflags -fsanitize=thread -pie
2823         case "$toolchain" in
2824             gcc-tsan)
2825                 add_cflags  -fPIC
2826                 add_ldflags -fPIC
2827                 ;;
2828         esac
2829     ;;
2830     *-usan)
2831         cc_default="${toolchain%-usan}"
2832         add_cflags  -fsanitize=undefined
2833         add_ldflags -fsanitize=undefined
2834         case "$toolchain" in
2835             clang-usan)
2836                 add_cflags -O1
2837                 ;;
2838         esac
2839     ;;
2840     valgrind-*)
2841         target_exec_default="valgrind"
2842         case "$toolchain" in
2843             valgrind-massif)
2844                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2845                 ;;
2846             valgrind-memcheck)
2847                 target_exec_args="--track-origins=yes --leak-check=full"
2848                 ;;
2849         esac
2850     ;;
2851     msvc)
2852         # Check whether the current MSVC version needs the C99 converter.
2853         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2854         # support enough of C99 to build libav. Default to the new
2855         # behaviour if the regexp was unable to match anything, since this
2856         # successfully parses the version number of existing supported
2857         # versions that require the converter (MSVC 2010 and 2012).
2858         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2859         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2860             cc_default="cl"
2861         else
2862             cc_default="c99wrap cl"
2863         fi
2864         ld_default="$source_path/compat/windows/mslink"
2865         nm_default="dumpbin -symbols"
2866         ar_default="lib"
2867         case "$arch" in
2868         arm*)
2869             as_default="armasm"
2870             ;;
2871         esac
2872         target_os_default="win32"
2873         # Use a relative path for TMPDIR. This makes sure all the
2874         # ffconf temp files are written with a relative path, avoiding
2875         # issues with msys/win32 path conversion for MSVC parameters
2876         # such as -Fo<file> or -out:<file>.
2877         TMPDIR=.
2878     ;;
2879     icl)
2880         cc_default="icl"
2881         ld_default="xilink"
2882         nm_default="dumpbin -symbols"
2883         ar_default="xilib"
2884         target_os_default="win32"
2885         TMPDIR=.
2886     ;;
2887     gcov)
2888         add_cflags  -fprofile-arcs -ftest-coverage
2889         add_ldflags -fprofile-arcs -ftest-coverage
2890     ;;
2891     llvm-cov)
2892         add_cflags -fprofile-arcs -ftest-coverage
2893         add_ldflags --coverage
2894     ;;
2895     hardened)
2896         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2897         add_cflags   -fno-strict-overflow -fstack-protector-all
2898         add_ldflags  -Wl,-z,relro -Wl,-z,now
2899     ;;
2900     ?*)
2901         die "Unknown toolchain $toolchain"
2902     ;;
2903 esac
2904
2905 test -n "$cross_prefix" && enable cross_compile
2906
2907 if enabled cross_compile; then
2908     test -n "$arch" && test -n "$target_os" ||
2909         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2910 fi
2911
2912 ar_default="${cross_prefix}${ar_default}"
2913 cc_default="${cross_prefix}${cc_default}"
2914 occ_default="${cross_prefix}${occ_default}"
2915 nm_default="${cross_prefix}${nm_default}"
2916 pkg_config_default="${cross_prefix}${pkg_config_default}"
2917 ranlib="${cross_prefix}${ranlib}"
2918 strip="${cross_prefix}${strip}"
2919
2920 sysinclude_default="${sysroot}/usr/include"
2921
2922 set_default arch cc pkg_config sysinclude target_exec target_os
2923 enabled cross_compile || host_cc_default=$cc
2924 set_default host_cc
2925
2926 if ! $pkg_config --version >/dev/null 2>&1; then
2927     warn "$pkg_config not found, library detection may fail."
2928     pkg_config=false
2929 fi
2930
2931 exesuf() {
2932     case $1 in
2933         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2934     esac
2935 }
2936
2937 EXESUF=$(exesuf $target_os)
2938 HOSTEXESUF=$(exesuf $host_os)
2939
2940 # set temporary file name
2941 : ${TMPDIR:=$TEMPDIR}
2942 : ${TMPDIR:=$TMP}
2943 : ${TMPDIR:=/tmp}
2944
2945 if ! check_cmd mktemp -u XXXXXX; then
2946     # simple replacement for missing mktemp
2947     # NOT SAFE FOR GENERAL USE
2948     mktemp(){
2949         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2950     }
2951 fi
2952
2953 tmpfile(){
2954     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2955         (set -C; exec > $tmp) 2>/dev/null ||
2956         die "Unable to create temporary file in $TMPDIR."
2957     append TMPFILES $tmp
2958     eval $1=$tmp
2959 }
2960
2961 trap 'rm -f -- $TMPFILES' EXIT
2962
2963 tmpfile TMPASM .asm
2964 tmpfile TMPC   .c
2965 tmpfile TMPE   $EXESUF
2966 tmpfile TMPH   .h
2967 tmpfile TMPO   .o
2968 tmpfile TMPS   .S
2969 tmpfile TMPSH  .sh
2970 tmpfile TMPV   .ver
2971
2972 unset -f mktemp
2973
2974 chmod +x $TMPE
2975
2976 # make sure we can execute files in $TMPDIR
2977 cat > $TMPSH 2>> $logfile <<EOF
2978 #! /bin/sh
2979 EOF
2980 chmod +x $TMPSH >> $logfile 2>&1
2981 if ! $TMPSH >> $logfile 2>&1; then
2982     cat <<EOF
2983 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2984 variable to another directory and make sure that it is not mounted noexec.
2985 EOF
2986     die "Sanity test failed."
2987 fi
2988
2989 armasm_flags(){
2990     for flag; do
2991         case $flag in
2992             # Filter out MSVC cl.exe options from cflags that shouldn't
2993             # be passed to gas-preprocessor
2994             -M[TD]*)                                            ;;
2995             *)                  echo $flag                      ;;
2996         esac
2997    done
2998 }
2999
3000 ccc_flags(){
3001     for flag; do
3002         case $flag in
3003             -std=c99)           echo -c99                       ;;
3004             -mcpu=*)            echo -arch ${flag#*=}           ;;
3005             -mieee)             echo -ieee                      ;;
3006             -O*|-fast)          echo $flag                      ;;
3007             -fno-math-errno)    echo -assume nomath_errno       ;;
3008             -g)                 echo -g3                        ;;
3009             -Wall)              echo -msg_enable level2         ;;
3010             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3011             -Wl,*)              echo $flag                      ;;
3012             -f*|-W*)                                            ;;
3013             *)                  echo $flag                      ;;
3014         esac
3015    done
3016 }
3017
3018 cparser_flags(){
3019     for flag; do
3020         case $flag in
3021             -Wno-switch)             echo -Wno-switch-enum ;;
3022             -Wno-format-zero-length) ;;
3023             -Wdisabled-optimization) ;;
3024             -Wno-pointer-sign)       echo -Wno-other ;;
3025             *)                       echo $flag ;;
3026         esac
3027     done
3028 }
3029
3030 msvc_common_flags(){
3031     for flag; do
3032         case $flag in
3033             # In addition to specifying certain flags under the compiler
3034             # specific filters, they must be specified here as well or else the
3035             # generic catch all at the bottom will print the original flag.
3036             -Wall)                ;;
3037             -std=c99)             ;;
3038             # Common flags
3039             -fomit-frame-pointer) ;;
3040             -g)                   echo -Z7 ;;
3041             -fno-math-errno)      ;;
3042             -fno-common)          ;;
3043             -fno-signed-zeros)    ;;
3044             -fPIC)                ;;
3045             -mthumb)              ;;
3046             -march=*)             ;;
3047             -lz)                  echo zlib.lib ;;
3048             -lx264)               echo libx264.lib ;;
3049             -l*)                  echo ${flag#-l}.lib ;;
3050             -L*)                  echo -libpath:${flag#-L} ;;
3051             *)                    echo $flag ;;
3052         esac
3053     done
3054 }
3055
3056 msvc_flags(){
3057     msvc_common_flags "$@"
3058     for flag; do
3059         case $flag in
3060             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3061                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3062                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3063                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3064         esac
3065     done
3066 }
3067
3068 icl_flags(){
3069     msvc_common_flags "$@"
3070     for flag; do
3071         case $flag in
3072             # Despite what Intel's documentation says -Wall, which is supported
3073             # on Windows, does enable remarks so disable them here.
3074             -Wall)                echo $flag -Qdiag-disable:remark ;;
3075             -std=c99)             echo -Qstd=c99 ;;
3076         esac
3077     done
3078 }
3079
3080 pgi_flags(){
3081     for flag; do
3082         case $flag in
3083             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3084             -fomit-frame-pointer) echo -Mnoframe ;;
3085             -g)                   echo -gopt ;;
3086             *)                    echo $flag ;;
3087         esac
3088     done
3089 }
3090
3091 suncc_flags(){
3092     for flag; do
3093         case $flag in
3094             -march=*|-mcpu=*)
3095                 case "${flag#*=}" in
3096                     native)                   echo -xtarget=native       ;;
3097                     v9|niagara)               echo -xarch=sparc          ;;
3098                     ultrasparc)               echo -xarch=sparcvis       ;;
3099                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3100                     i586|pentium)             echo -xchip=pentium        ;;
3101                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3102                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3103                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3104                     pentium4*)          echo -xtarget=pentium4           ;;
3105                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3106                     *-sse3)             echo -xarch=sse3                 ;;
3107                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3108                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3109                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3110                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3111                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3112                     k8|opteron|athlon64|athlon-fx)
3113                                                echo -xarch=sse2a         ;;
3114                     athlon*)                   echo -xarch=pentium_proa  ;;
3115                 esac
3116                 ;;
3117             -std=c99)             echo -xc99              ;;
3118             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3119             -fPIC)                echo -KPIC -xcode=pic32 ;;
3120             -W*,*)                echo $flag              ;;
3121             -f*-*|-W*|-mimpure-text)                      ;;
3122             -shared)              echo -G                 ;;
3123             *)                    echo $flag              ;;
3124         esac
3125     done
3126 }
3127
3128 tms470_flags(){
3129     for flag; do
3130         case $flag in
3131             -march=*|-mcpu=*)
3132                 case "${flag#*=}" in
3133                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3134                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3135                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3136                     armv6*|arm11*)          echo -mv=6   ;;
3137                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3138                                             echo -mv=5e  ;;
3139                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3140                 esac
3141                 ;;
3142             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3143             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3144             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3145             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3146             -msoft-float)   echo --float_support=vfplib       ;;
3147             -O[0-3]|-mf=*)  echo $flag                        ;;
3148             -g)             echo -g -mn                       ;;
3149             -pds=*)         echo $flag                        ;;
3150             -D*|-I*)        echo $flag                        ;;
3151             --gcc|--abi=*)  echo $flag                        ;;
3152             -me)            echo $flag                        ;;
3153         esac
3154     done
3155 }
3156
3157 probe_cc(){
3158     pfx=$1
3159     _cc=$2
3160
3161     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3162     unset _ld_o _ldflags _ld_lib _ld_path
3163     unset _depflags _DEPCMD _DEPFLAGS
3164     _flags_filter=echo
3165
3166     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3167         _type=llvm_gcc
3168         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3169         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3170         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3171         _cflags_speed='-O3'
3172         _cflags_size='-Os'
3173     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3174         _type=gcc
3175         gcc_version=$($_cc --version | head -n1)
3176         gcc_basever=$($_cc -dumpversion)
3177         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3178         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3179         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3180         if ! $_cc -dumpversion | grep -q '^2\.'; then
3181             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3182         fi
3183         _cflags_speed='-O3'
3184         _cflags_size='-Os'
3185     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3186         _type=icc
3187         _ident=$($_cc --version | head -n1)
3188         _depflags='-MMD'
3189         _cflags_speed='-O3'
3190         _cflags_size='-Os'
3191         _cflags_noopt='-O1'
3192     elif $_cc -v 2>&1 | grep -q xlc; then
3193         _type=xlc
3194         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3195         _cflags_speed='-O5'
3196         _cflags_size='-O5 -qcompact'
3197     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3198         _type=ccc
3199         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3200         _DEPFLAGS='-M'
3201         _cflags_speed='-fast'
3202         _cflags_size='-O1'
3203         _flags_filter=ccc_flags
3204     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3205         test -d "$sysroot" || die "No valid sysroot specified."
3206         _type=armcc
3207         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3208         armcc_conf="$PWD/armcc.conf"
3209         $_cc --arm_linux_configure                 \
3210              --arm_linux_config_file="$armcc_conf" \
3211              --configure_sysroot="$sysroot"        \
3212              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3213              die "Error creating armcc configuration file."
3214         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3215         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3216         as_default="${cross_prefix}gcc"
3217         _depflags='-MMD'
3218         _cflags_speed='-O3'
3219         _cflags_size='-Os'
3220     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3221         _type=tms470
3222         _ident=$($_cc -version | head -n1 | tr -s ' ')
3223         _flags='--gcc --abi=eabi -me'
3224         _cc_e='-ppl -fe=$@'
3225         _cc_o='-fe=$@'
3226         _depflags='-ppa -ppd=$(@:.o=.d)'
3227         _cflags_speed='-O3 -mf=5'
3228         _cflags_size='-O3 -mf=2'
3229         _flags_filter=tms470_flags
3230     elif $_cc -v 2>&1 | grep -q clang; then
3231         _type=clang
3232         _ident=$($_cc --version 2>/dev/null | head -n1)
3233         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3234         _cflags_speed='-O3'
3235         _cflags_size='-Os'
3236     elif $_cc -V 2>&1 | grep -q Sun; then
3237         _type=suncc
3238         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3239         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3240         _DEPFLAGS='-xM1 -xc99'
3241         _ldflags='-std=c99'
3242         _cflags_speed='-O5'
3243         _cflags_size='-O5 -xspace'
3244         _flags_filter=suncc_flags
3245     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3246         _type=pathscale
3247         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3248         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3249         _cflags_speed='-O2'
3250         _cflags_size='-Os'
3251         _flags_filter='filter_out -Wdisabled-optimization'
3252     elif $_cc -v 2>&1 | grep -q Open64; then
3253         _type=open64
3254         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3255         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3256         _cflags_speed='-O2'
3257         _cflags_size='-Os'
3258         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3259     elif $_cc -V 2>&1 | grep -q Portland; then
3260         _type=pgi
3261         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3262         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3263         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3264         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3265         _cflags_noopt="-O1"
3266         _flags_filter=pgi_flags
3267     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3268         _type=armasm
3269         _ident=$($_cc | head -n1)
3270         # 4509: "This form of conditional instruction is deprecated"
3271         _flags="-nologo -ignore 4509"
3272         _flags_filter=armasm_flags
3273     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3274         _type=msvc
3275         _ident=$($_cc 2>&1 | head -n1)
3276         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3277         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3278         _cflags_speed="-O2"
3279         _cflags_size="-O1"
3280         _cflags_noopt="-O1"
3281         if $_cc -nologo- 2>&1 | grep -q Linker; then
3282             _ld_o='-out:$@'
3283         else
3284             _ld_o='-Fe$@'
3285         fi
3286         _cc_o='-Fo$@'
3287         _cc_e='-P -Fi$@'
3288         _flags_filter=msvc_flags
3289         _ld_lib='lib%.a'
3290         _ld_path='-libpath:'
3291         _flags='-nologo'
3292     elif $_cc 2>&1 | grep -q Intel; then
3293         _type=icl
3294         _ident=$($_cc 2>&1 | head -n1)
3295         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3296         # Not only is O3 broken on 13.x+ but it is slower on all previous
3297         # versions (tested) as well.
3298         _cflags_speed="-O2"
3299         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3300         if $_cc 2>&1 | grep -q Linker; then
3301             _ld_o='-out:$@'
3302         else
3303             _ld_o='-Fe$@'
3304         fi
3305         _cc_o='-Fo$@'
3306         _cc_e='-P'
3307         _flags_filter=icl_flags
3308         _ld_lib='lib%.a'
3309         _ld_path='-libpath:'
3310         # -Qdiag-error to make icl error when seeing certain unknown arguments
3311         _flags='-nologo -Qdiag-error:4044,10157'
3312         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3313         # with MSVC which enables it by default.
3314         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3315     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3316         # lld can emulate multiple different linkers; in ms link.exe mode,
3317         # the -? parameter gives the help output which contains an identifyable
3318         # string, while it gives an error in other modes.
3319         _type=lld-link
3320         # The link.exe mode doesn't have a switch for getting the version,
3321         # but we can force it back to gnu mode and get the version from there.
3322         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3323         _ld_o='-out:$@'
3324         _flags_filter=msvc_flags
3325         _ld_lib='lib%.a'
3326         _ld_path='-libpath:'
3327     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3328         _type=cparser
3329         _ident=$($_cc --version | head -n1)
3330         _depflags='-MMD'
3331         _cflags_speed='-O4'
3332         _cflags_size='-O2'
3333         _flags_filter=cparser_flags
3334     fi
3335
3336     eval ${pfx}_type=\$_type
3337     eval ${pfx}_ident=\$_ident
3338 }
3339
3340 set_ccvars(){
3341     eval ${1}_C=\${_cc_c-\${${1}_C}}
3342     eval ${1}_E=\${_cc_e-\${${1}_E}}
3343     eval ${1}_O=\${_cc_o-\${${1}_O}}
3344
3345     if [ -n "$_depflags" ]; then
3346         eval ${1}_DEPFLAGS=\$_depflags
3347     else
3348         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3349         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3350         eval DEP${1}FLAGS=\$_flags
3351     fi
3352 }
3353
3354 probe_cc cc "$cc"
3355 cflags_filter=$_flags_filter
3356 cflags_speed=$_cflags_speed
3357 cflags_size=$_cflags_size
3358 cflags_noopt=$_cflags_noopt
3359 add_cflags $_flags $_cflags
3360 cc_ldflags=$_ldflags
3361 set_ccvars CC
3362
3363 probe_cc hostcc "$host_cc"
3364 host_cflags_filter=$_flags_filter
3365 add_host_cflags  $_flags $_cflags
3366 set_ccvars HOSTCC
3367
3368 test -n "$cc_type" && enable $cc_type ||
3369     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3370
3371 : ${as_default:=$cc}
3372 : ${objcc_default:=$cc}
3373 : ${dep_cc_default:=$cc}
3374 : ${ld_default:=$cc}
3375 : ${host_ld_default:=$host_cc}
3376 set_default ar as objcc dep_cc ld host_ld
3377
3378 probe_cc as "$as"
3379 asflags_filter=$_flags_filter
3380 add_asflags $_flags $_cflags
3381 set_ccvars AS
3382
3383 probe_cc objcc "$objcc"
3384 objcflags_filter=$_flags_filter
3385 add_objcflags $_flags $_cflags
3386 set_ccvars OBJC
3387
3388 probe_cc ld "$ld"
3389 ldflags_filter=$_flags_filter
3390 add_ldflags $_flags $_ldflags
3391 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3392 LD_O=${_ld_o-$LD_O}
3393 LD_LIB=${_ld_lib-$LD_LIB}
3394 LD_PATH=${_ld_path-$LD_PATH}
3395
3396 probe_cc hostld "$host_ld"
3397 host_ldflags_filter=$_flags_filter
3398 add_host_ldflags $_flags $_ldflags
3399 HOSTLD_O=${_ld_o-$HOSTLD_O}
3400
3401 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3402     probe_cc depcc "$dep_cc"
3403     CCDEP=${_DEPCMD:-$DEPCMD}
3404     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3405     DEPCCFLAGS=$_flags
3406 fi
3407
3408 if $ar 2>&1 | grep -q Microsoft; then
3409     arflags="-nologo"
3410     ar_o='-out:$@'
3411 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3412     arflags="rq"
3413     ar_o='$@'
3414 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3415     arflags='-Xany -r -c'
3416     ar_o='$@'
3417 else
3418     arflags="rc"
3419     ar_o='$@'
3420 fi
3421
3422 add_cflags $extra_cflags
3423 add_objcflags $extra_objcflags
3424 add_asflags $extra_cflags
3425
3426 if test -n "$sysroot"; then
3427     case "$cc_type" in
3428         gcc|llvm_gcc|clang)
3429             add_cppflags --sysroot="$sysroot"
3430             add_ldflags --sysroot="$sysroot"
3431         ;;
3432         tms470)
3433             add_cppflags -I"$sysinclude"
3434             add_ldflags  --sysroot="$sysroot"
3435         ;;
3436     esac
3437 fi
3438
3439 if test "$cpu" = host; then
3440     enabled cross_compile &&
3441         die "--cpu=host makes no sense when cross-compiling."
3442
3443     case "$cc_type" in
3444         gcc|llvm_gcc)
3445             check_native(){
3446                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3447                 sed -n "/cc1.*$1=/{
3448                             s/.*$1=\\([^ ]*\\).*/\\1/
3449                             p
3450                             q
3451                         }" $TMPE
3452             }
3453             cpu=$(check_native -march || check_native -mcpu)
3454         ;;
3455     esac
3456
3457     test "${cpu:-host}" = host &&
3458         die "--cpu=host not supported with compiler $cc"
3459 fi
3460
3461 # Deal with common $arch aliases
3462 case "$arch" in
3463     aarch64|arm64)
3464         arch="aarch64"
3465     ;;
3466     arm*)
3467         arch="arm"
3468     ;;
3469     mips*|IP*)
3470         case "$arch" in
3471         *el)
3472             add_cppflags -EL
3473             add_ldflags -EL
3474         ;;
3475         *eb)
3476             add_cppflags -EB
3477             add_ldflags -EB
3478         ;;
3479         esac
3480         arch="mips"
3481     ;;
3482     parisc*|hppa*)
3483         arch="parisc"
3484     ;;
3485     "Power Macintosh"|ppc*|powerpc*)
3486         arch="ppc"
3487     ;;
3488     s390|s390x)
3489         arch="s390"
3490     ;;
3491     sh4|sh)
3492         arch="sh4"
3493     ;;
3494     sun4u|sparc*)
3495         arch="sparc"
3496     ;;
3497     tilegx|tile-gx)
3498         arch="tilegx"
3499     ;;
3500     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3501         arch="x86"
3502     ;;
3503 esac
3504
3505 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3506 enable $arch
3507
3508 # Add processor-specific flags
3509 if enabled aarch64; then
3510
3511     case $cpu in
3512         armv*)
3513             cpuflags="-march=$cpu"
3514         ;;
3515         *)
3516             cpuflags="-mcpu=$cpu"
3517         ;;
3518     esac
3519
3520 elif enabled alpha; then
3521
3522     cpuflags="-mcpu=$cpu"
3523
3524 elif enabled arm; then
3525
3526     check_arm_arch() {
3527         check_cpp_condition stddef.h \
3528             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3529             $cpuflags
3530     }
3531
3532     probe_arm_arch() {
3533         if   check_arm_arch 4;        then echo armv4
3534         elif check_arm_arch 4T;       then echo armv4t
3535         elif check_arm_arch 5;        then echo armv5
3536         elif check_arm_arch 5E;       then echo armv5e
3537         elif check_arm_arch 5T;       then echo armv5t
3538         elif check_arm_arch 5TE;      then echo armv5te
3539         elif check_arm_arch 5TEJ;     then echo armv5te
3540         elif check_arm_arch 6;        then echo armv6
3541         elif check_arm_arch 6J;       then echo armv6j
3542         elif check_arm_arch 6K;       then echo armv6k
3543         elif check_arm_arch 6Z;       then echo armv6z
3544         elif check_arm_arch 6ZK;      then echo armv6zk
3545         elif check_arm_arch 6T2;      then echo armv6t2
3546         elif check_arm_arch 7;        then echo armv7
3547         elif check_arm_arch 7A  7_A;  then echo armv7-a
3548         elif check_arm_arch 7S;       then echo armv7-a
3549         elif check_arm_arch 7R  7_R;  then echo armv7-r
3550         elif check_arm_arch 7M  7_M;  then echo armv7-m
3551         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3552         elif check_arm_arch 8A  8_A;  then echo armv8-a
3553         fi
3554     }
3555
3556     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3557
3558     case $cpu in
3559         armv*)
3560             cpuflags="-march=$cpu"
3561             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3562         ;;
3563         *)
3564             cpuflags="-mcpu=$cpu"
3565             case $cpu in
3566                 cortex-a*)                               subarch=armv7a  ;;
3567                 cortex-r*)                               subarch=armv7r  ;;
3568                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3569                 arm11*)                                  subarch=armv6   ;;
3570                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3571                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3572                 *)                             subarch=$(probe_arm_arch) ;;
3573             esac
3574         ;;
3575     esac
3576
3577     case "$subarch" in
3578         armv5t*)    enable fast_clz                ;;
3579         armv[6-8]*) enable fast_clz fast_unaligned ;;
3580     esac
3581
3582 elif enabled avr32; then
3583
3584     case $cpu in
3585         ap7[02]0[0-2])
3586             subarch="avr32_ap"
3587             cpuflags="-mpart=$cpu"
3588         ;;
3589         ap)
3590             subarch="avr32_ap"
3591             cpuflags="-march=$cpu"
3592         ;;
3593         uc3[ab]*)
3594             subarch="avr32_uc"
3595             cpuflags="-mcpu=$cpu"
3596         ;;
3597         uc)
3598             subarch="avr32_uc"
3599             cpuflags="-march=$cpu"
3600         ;;
3601     esac
3602
3603 elif enabled bfin; then
3604
3605     cpuflags="-mcpu=$cpu"
3606
3607 elif enabled mips; then
3608
3609     cpuflags="-march=$cpu"
3610
3611 elif enabled ppc; then
3612
3613     disable ldbrx
3614
3615     case $(tolower $cpu) in
3616         601|ppc601|powerpc601)
3617             cpuflags="-mcpu=601"
3618             disable altivec
3619         ;;
3620         603*|ppc603*|powerpc603*)
3621             cpuflags="-mcpu=603"
3622             disable altivec
3623         ;;
3624         604*|ppc604*|powerpc604*)
3625             cpuflags="-mcpu=604"
3626             disable altivec
3627         ;;
3628         g3|75*|ppc75*|powerpc75*)
3629             cpuflags="-mcpu=750"
3630             disable altivec
3631         ;;
3632         g4|745*|ppc745*|powerpc745*)
3633             cpuflags="-mcpu=7450"
3634             disable vsx
3635         ;;
3636         74*|ppc74*|powerpc74*)
3637             cpuflags="-mcpu=7400"
3638             disable vsx
3639         ;;
3640         g5|970|ppc970|powerpc970)
3641             cpuflags="-mcpu=970"
3642             disable vsx
3643         ;;
3644         power[3-6]*)
3645             cpuflags="-mcpu=$cpu"
3646             disable vsx
3647         ;;
3648         power[7-8]*)
3649             cpuflags="-mcpu=$cpu"
3650             enable ldbrx
3651         ;;
3652         cell)
3653             cpuflags="-mcpu=cell"
3654             enable ldbrx
3655             disable vsx
3656         ;;
3657         e500mc)
3658             cpuflags="-mcpu=e500mc"
3659             disable altivec
3660         ;;
3661         e500v2)
3662             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3663             disable altivec
3664             disable dcbzl
3665         ;;
3666         e500)
3667             cpuflags="-mcpu=8540 -mhard-float"
3668             disable altivec
3669             disable dcbzl
3670         ;;
3671     esac
3672
3673 elif enabled sparc; then
3674
3675     case $cpu in
3676         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3677             cpuflags="-mcpu=$cpu"
3678         ;;
3679         ultrasparc*|niagara[234])
3680             cpuflags="-mcpu=$cpu"
3681         ;;
3682     esac
3683
3684 elif enabled x86; then
3685
3686     case $cpu in
3687         i[345]86|pentium)
3688             cpuflags="-march=$cpu"
3689             disable i686
3690             disable mmx
3691         ;;
3692         # targets that do NOT support nopl and conditional mov (cmov)
3693         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3694             cpuflags="-march=$cpu"
3695             disable i686
3696         ;;
3697         # targets that do support nopl and conditional mov (cmov)
3698         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3699             cpuflags="-march=$cpu"
3700             enable i686
3701             enable fast_cmov
3702         ;;
3703         # targets that do support conditional mov but on which it's slow
3704         pentium4|pentium4m|prescott|nocona)
3705             cpuflags="-march=$cpu"
3706             enable i686
3707             disable fast_cmov
3708         ;;
3709     esac
3710
3711 fi
3712
3713 if [ "$cpu" != generic ]; then
3714     add_cflags  $cpuflags
3715     add_asflags $cpuflags
3716     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3717 fi
3718
3719 # compiler sanity check
3720 check_exec <<EOF
3721 int main(void){ return 0; }
3722 EOF
3723 if test "$?" != 0; then
3724     echo "$cc is unable to create an executable file."
3725     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3726         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3727         echo "Only do this if you know what cross compiling means."
3728     fi
3729     die "C compiler test failed."
3730 fi
3731
3732 add_cppflags -D_ISOC99_SOURCE
3733
3734 # some compilers silently accept -std=c11, so we also need to check that the
3735 # version macro is defined properly
3736 if test_cflags_cpp -std=c11 "__STDC_VERSION__ >= 201112L"; then
3737     add_cflags -std=c11
3738 else
3739     check_cflags -std=c99
3740 fi
3741
3742 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3743 #include <stdlib.h>
3744 EOF
3745 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3746 #include <stdlib.h>
3747 EOF
3748
3749 add_host_cppflags -D_ISOC99_SOURCE
3750 check_host_cflags -std=c99
3751 check_host_cflags -Wall
3752 check_host_cflags -O3
3753
3754 check_64bit(){
3755     arch32=$1
3756     arch64=$2
3757     expr=$3
3758     check_code cc "" "int test[2*($expr) - 1]" &&
3759         subarch=$arch64 || subarch=$arch32
3760 }
3761
3762 case "$arch" in
3763     aarch64|alpha|ia64)
3764         spic=$shared
3765     ;;
3766     mips)
3767         check_64bit mips mips64 '_MIPS_SIM > 1'
3768         spic=$shared
3769     ;;
3770     parisc)
3771         check_64bit parisc parisc64 'sizeof(void *) > 4'
3772         spic=$shared
3773     ;;
3774     ppc)
3775         check_64bit ppc ppc64 'sizeof(void *) > 4'
3776         spic=$shared
3777     ;;
3778     s390)
3779         check_64bit s390 s390x 'sizeof(void *) > 4'
3780         spic=$shared
3781     ;;
3782     sparc)
3783         check_64bit sparc sparc64 'sizeof(void *) > 4'
3784         spic=$shared
3785     ;;
3786     x86)
3787         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3788         if test "$subarch" = "x86_64"; then
3789             spic=$shared
3790         fi
3791     ;;
3792 esac
3793
3794 enable $subarch
3795 enabled spic && enable_weak pic
3796
3797 # OS specific
3798 case $target_os in
3799     aix)
3800         SHFLAGS=-shared
3801         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3802         enabled shared && add_ldflags -Wl,-brtl
3803         ;;
3804     android)
3805         disable symver
3806         enable section_data_rel_ro
3807         SLIB_INSTALL_NAME='$(SLIBNAME)'
3808         SLIB_INSTALL_LINKS=
3809         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3810         ;;
3811     haiku)
3812         prefix_default="/boot/common"
3813         network_extralibs="-lnetwork"
3814         host_extralibs=
3815         ;;
3816     sunos)
3817         SHFLAGS='-shared -Wl,-h,$$(@F)'
3818         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3819         network_extralibs="-lsocket -lnsl"
3820         # When using suncc to build, the Solaris linker will mark
3821         # an executable with each instruction set encountered by
3822         # the Solaris assembler.  As our libraries contain their own
3823         # guards for processor-specific code, instead suppress
3824         # generation of the HWCAPS ELF section on Solaris x86 only.
3825         enabled_all suncc x86 &&
3826             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3827             add_ldflags -Wl,-M,mapfile
3828         nm_default='nm -P -g'
3829         version_script='-M'
3830         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3831         ;;
3832     netbsd)
3833         disable symver
3834         oss_indev_extralibs="-lossaudio"
3835         oss_outdev_extralibs="-lossaudio"
3836         ;;
3837     openbsd|bitrig)
3838         disable symver
3839         SHFLAGS='-shared'
3840         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3841         SLIB_INSTALL_LINKS=
3842         oss_indev_extralibs="-lossaudio"
3843         oss_outdev_extralibs="-lossaudio"
3844         ;;
3845     dragonfly)
3846         disable symver
3847         ;;
3848     freebsd)
3849         ;;
3850     bsd/os)
3851         add_extralibs -lpoll -lgnugetopt
3852         ;;
3853     darwin)
3854         enabled ppc && add_asflags -force_cpusubtype_ALL
3855         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3856         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3857         add_ldflags -Wl,-dynamic,-search_paths_first
3858         SLIBSUF=".dylib"
3859         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3860         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3861         objformat="macho"
3862         enabled x86_64 && objformat="macho64"
3863         enabled_any pic shared ||
3864             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3865         check_header dispatch/dispatch.h &&
3866             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3867         ;;
3868     msys*)
3869         die "Native MSYS builds are discouraged, please use the MINGW environment."
3870         ;;
3871     mingw32*|mingw64*)
3872         if test $target_os = "mingw32ce"; then
3873             disable network
3874         else
3875             target_os=mingw32
3876         fi
3877         LIBTARGET=i386
3878         if enabled x86_64; then
3879             LIBTARGET="i386:x86-64"
3880         elif enabled arm; then
3881             LIBTARGET=arm-wince
3882         fi
3883         check_ldflags -Wl,--nxcompat
3884         check_ldflags -Wl,--dynamicbase
3885         shlibdir_default="$bindir_default"
3886         SLIBPREF=""
3887         SLIBSUF=".dll"
3888         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3889         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3890         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3891         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3892         SLIB_INSTALL_LINKS=
3893         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3894         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3895         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3896         objformat="win32"
3897         dlltool="${cross_prefix}dlltool"
3898         ranlib=:
3899         enable dos_paths
3900         ;;
3901     win32|win64)
3902         disable symver
3903         if enabled shared; then
3904             # Link to the import library instead of the normal static library
3905             # for shared libs.
3906             LD_LIB='%.lib'
3907             # Cannot build both shared and static libs with MSVC or icl.
3908             disable static
3909         fi
3910         shlibdir_default="$bindir_default"
3911         SLIBPREF=""
3912         SLIBSUF=".dll"
3913         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3914         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3915         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3916         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3917         SLIB_INSTALL_LINKS=
3918         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3919         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3920         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3921         objformat="win32"
3922         ranlib=:
3923         enable dos_paths
3924         ;;
3925     cygwin*)
3926         target_os=cygwin
3927         shlibdir_default="$bindir_default"
3928         SLIBPREF="cyg"
3929         SLIBSUF=".dll"
3930         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3931         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3932         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3933         SLIB_INSTALL_LINKS=
3934         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3935         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3936         objformat="win32"
3937         enable dos_paths
3938         ;;
3939     *-dos|freedos|opendos)
3940         network_extralibs="-lsocket"
3941         objformat="coff"
3942         enable dos_paths
3943         add_cppflags -U__STRICT_ANSI__
3944         ;;
3945     linux)
3946         enable dv1394
3947         enable section_data_rel_ro
3948         ;;
3949     irix*)
3950         target_os=irix
3951         ranlib="echo ignoring ranlib"
3952         ;;
3953     os/2*)
3954         ln_s="cp -f"
3955         objformat="aout"
3956         add_cppflags -D_GNU_SOURCE
3957         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3958         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3959         LIBSUF="_s.a"
3960         SLIBPREF=""
3961         SLIBSUF=".dll"
3962         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3963         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3964         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3965             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3966             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3967             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3968             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3969         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3970             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3971         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3972         enable dos_paths
3973         ;;
3974     gnu/kfreebsd)
3975         add_cppflags -D_BSD_SOURCE
3976         ;;
3977     gnu)
3978         ;;
3979     qnx)
3980         add_cppflags -D_QNX_SOURCE
3981         network_extralibs="-lsocket"
3982         ;;
3983     symbian)
3984         SLIBSUF=".dll"
3985         enable dos_paths
3986         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3987         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3988         add_ldflags -Wl,--target1-abs,--no-undefined \
3989                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3990                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3991         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3992                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3993                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3994         ;;
3995     osf1)
3996         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3997         ;;
3998     minix)
3999         ;;
4000     none)
4001         ;;
4002     *)
4003         die "Unknown OS '$target_os'."
4004         ;;
4005 esac
4006
4007 # determine libc flavour
4008
4009 probe_libc(){
4010     pfx=$1
4011     pfx_no_=${pfx%_}
4012     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4013     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4014         eval ${pfx}libc_type=uclibc
4015         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4016     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4017         eval ${pfx}libc_type=glibc
4018         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4019     # MinGW headers can be installed on Cygwin, so check for newlib first.
4020     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4021         eval ${pfx}libc_type=newlib
4022         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4023     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4024     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4025         eval ${pfx}libc_type=mingw64
4026         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4027         eval test \$${pfx_no_}cc_type = "gcc" &&
4028             add_${pfx}cppflags -D__printf__=__gnu_printf__
4029     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4030          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4031         eval ${pfx}libc_type=mingw32
4032         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4033             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4034             die "ERROR: MinGW32 runtime version must be >= 3.15."
4035         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4036         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4037             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4038         eval test \$${pfx_no_}cc_type = "gcc" &&
4039             add_${pfx}cppflags -D__printf__=__gnu_printf__
4040     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4041         eval ${pfx}libc_type=msvcrt
4042         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4043             if [ "$pfx" = host_ ]; then
4044                 add_host_cppflags -Dsnprintf=_snprintf
4045             else
4046                 add_compat strtod.o strtod=avpriv_strtod
4047                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4048                                              _snprintf=avpriv_snprintf  \
4049                                              vsnprintf=avpriv_vsnprintf
4050             fi
4051         fi
4052         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4053         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4054         # 0x601 by default unless something else is set by the user.
4055         # This can easily lead to us detecting functions only present
4056         # in such new versions and producing binaries requiring windows 7.0.
4057         # Therefore explicitly set the default to XP unless the user has
4058         # set something else on the command line.
4059         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4060         # family. For these cases, configure is free to use any functions
4061         # found in the SDK headers by default. (Alternatively, we could force
4062         # _WIN32_WINNT to 0x0602 in that case.)
4063         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4064             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4065 #ifdef WINAPI_FAMILY
4066 #include <winapifamily.h>
4067 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4068 #error not desktop
4069 #endif
4070 #endif
4071 EOF
4072         if [ "$pfx" = "" ]; then
4073             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4074         fi
4075     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4076         eval ${pfx}libc_type=klibc
4077     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4078         eval ${pfx}libc_type=bionic
4079     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4080         eval ${pfx}libc_type=solaris
4081         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4082     else
4083         eval ${pfx}libc_type=default
4084         add_${pfx}cppflags -D_DEFAULT_SOURCE
4085     fi
4086 }
4087
4088 probe_libc
4089 test -n "$libc_type" && enable libc_$libc_type
4090 probe_libc host_
4091 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4092
4093 case $libc_type in
4094     bionic)
4095         add_compat strtod.o strtod=avpriv_strtod
4096         ;;
4097 esac
4098
4099 # hacks for compiler/libc/os combinations
4100
4101 if enabled_all tms470 libc_glibc; then
4102     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4103     add_cppflags -D__USER_LABEL_PREFIX__=
4104     add_cppflags -D__builtin_memset=memset
4105     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4106     add_cflags   -pds=48    # incompatible redefinition of macro
4107 fi
4108
4109 if enabled_all ccc libc_glibc; then
4110     add_ldflags -Wl,-z,now  # calls to libots crash without this
4111 fi
4112
4113 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4114     add_cppflags '-I\$(SRC_PATH)/compat/float'
4115
4116 esc(){
4117     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4118 }
4119
4120 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4121
4122 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4123
4124 set_default $PATHS_LIST
4125 set_default nm
4126
4127 # we need to build at least one lib type
4128 if ! enabled_any static shared; then
4129     cat <<EOF
4130 At least one library type must be built.
4131 Specify --enable-static to build the static libraries or --enable-shared to
4132 build the shared libraries as well. To only build the shared libraries specify
4133 --disable-static in addition to --enable-shared.
4134 EOF
4135     exit 1
4136 fi
4137
4138 disabled optimizations || check_cflags -fomit-frame-pointer
4139
4140 enable_weak_pic() {
4141     disabled pic && return
4142     enable pic
4143     add_cppflags -DPIC
4144     case "$target_os" in
4145     mingw*|cygwin*)
4146         ;;
4147     *)
4148         add_cflags -fPIC
4149         ;;
4150     esac
4151     add_asflags  -fPIC
4152 }
4153
4154 enabled pic && enable_weak_pic
4155
4156 check_cc <<EOF || die "Symbol mangling check failed."
4157 int ff_extern;
4158 EOF
4159 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4160 extern_prefix=${sym%%ff_extern*}
4161
4162 check_cc <<EOF && enable_weak inline_asm
4163 void foo(void) { __asm__ volatile ("" ::); }
4164 EOF
4165
4166 _restrict=
4167 for restrict_keyword in restrict __restrict__ __restrict; do
4168     check_cc <<EOF && _restrict=$restrict_keyword && break
4169 void foo(char * $restrict_keyword p);
4170 EOF
4171 done
4172
4173 check_cc <<EOF && enable pragma_deprecated
4174 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4175 EOF
4176
4177 check_cc <<EOF && enable attribute_packed
4178 struct { int x; } __attribute__((packed)) x;
4179 EOF
4180
4181 check_cc <<EOF && enable attribute_may_alias
4182 union { int x; } __attribute__((may_alias)) x;
4183 EOF
4184
4185 check_cc <<EOF || die "endian test failed"
4186 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4187 EOF
4188 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4189
4190 check_gas() {
4191     log "check_gas using '$as' as AS"
4192     # :vararg is used on aarch64, arm and ppc altivec
4193     check_as <<EOF || return 1
4194 .macro m n, y:vararg=0
4195 \n: .int \y
4196 .endm
4197 m x
4198 EOF
4199     # .altmacro is only used in arm asm
4200     ! enabled arm || check_as <<EOF || return 1
4201 .altmacro
4202 EOF
4203     enable gnu_as
4204     return 0
4205 }
4206
4207 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4208     nogas=:
4209     enabled_any arm aarch64 && nogas=die
4210     enabled_all ppc altivec && nogas=warn
4211     as_noop=-v
4212
4213     case $as_type in
4214         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4215         gcc)  gaspp_as_type=gas ;;
4216         *)    gaspp_as_type=$as_type ;;
4217     esac
4218
4219     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4220
4221     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4222         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4223
4224     if ! check_gas ; then
4225         as=${gas:=$as}
4226         check_gas || \
4227             $nogas "GNU assembler not found, install/update gas-preprocessor"
4228     fi
4229
4230     check_as <<EOF && enable as_func
4231 .func test
4232 .endfunc
4233 EOF
4234 fi
4235
4236 check_inline_asm inline_asm_labels '"1:\n"'
4237
4238 if enabled aarch64; then
4239     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4240     # internal assembler in clang 3.3 does not support this instruction
4241     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4242     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4243
4244     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4245
4246 elif enabled alpha; then
4247
4248     check_cflags -mieee
4249
4250 elif enabled arm; then
4251
4252     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4253     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4254     enabled thumb && check_cflags -mthumb || check_cflags -marm
4255
4256     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4257         enable vfp_args
4258     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4259         enable vfp_args
4260     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4261         case "${cross_prefix:-$cc}" in
4262             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4263             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4264 __asm__ (".eabi_attribute 28, 1");
4265 int main(void) { return 0; }
4266 EOF
4267         esac
4268         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4269     fi
4270
4271     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4272     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4273     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4274     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4275     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4276     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4277
4278     [ $target_os = linux ] || [ $target_os = android ] ||
4279         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4280             $ARCH_EXT_LIST_ARM
4281
4282     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4283
4284     check_as <<EOF && enable as_dn_directive
4285 ra .dn d0.i16
4286 .unreq ra
4287 EOF
4288     check_as <<EOF && enable as_fpu_directive
4289 .fpu neon
4290 EOF
4291
4292     # llvm's integrated assembler supports .object_arch from llvm 3.5
4293     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4294 .object_arch armv4
4295 EOF
4296
4297     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4298
4299 elif enabled mips; then
4300
4301     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4302
4303     # make sure that only an instruction set is enabled
4304     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4305
4306     if enabled mips64; then
4307         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4308             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4309                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4310     else
4311         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4312             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4313                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4314     fi
4315
4316 elif enabled parisc; then
4317
4318     if enabled gcc; then
4319         case $($cc -dumpversion) in
4320             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4321         esac
4322     fi
4323
4324 elif enabled ppc; then
4325
4326     enable local_aligned_8 local_aligned_16 local_aligned_32
4327
4328     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4329     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4330     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4331     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4332
4333     # AltiVec flags: The FSF version of GCC differs from the Apple version
4334     if enabled altivec; then
4335         check_cflags -maltivec -mabi=altivec &&
4336         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4337         check_cflags -faltivec
4338
4339         # check if our compiler supports Motorola AltiVec C API
4340         check_cc <<EOF || disable altivec
4341 $inc_altivec_h
4342 int main(void) {
4343     vector signed int v1 = (vector signed int) { 0 };
4344     vector signed int v2 = (vector signed int) { 1 };
4345     v1 = vec_add(v1, v2);
4346     return 0;
4347 }
4348 EOF
4349
4350         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4351     fi
4352
4353     if enabled vsx; then
4354         check_cflags -mvsx &&
4355         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4356     fi
4357
4358     if enabled power8; then
4359         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4360     fi
4361
4362 elif enabled x86; then
4363
4364     check_builtin rdtsc    intrin.h   "__rdtsc()"
4365     check_builtin mm_empty mmintrin.h "_mm_empty()"
4366
4367     enable local_aligned_8 local_aligned_16 local_aligned_32
4368
4369     # check whether EBP is available on x86
4370     # As 'i' is stored on the stack, this program will crash
4371     # if the base pointer is used to access it because the
4372     # base pointer is cleared in the inline assembly code.
4373     check_exec_crash <<EOF && enable ebp_available
4374 volatile int i=0;
4375 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4376 return i;
4377 EOF
4378
4379     # check whether EBX is available on x86
4380     check_inline_asm ebx_available '""::"b"(0)' &&
4381         check_inline_asm ebx_available '"":::"%ebx"'
4382
4383     # check whether xmm clobbers are supported
4384     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4385
4386     # check whether binutils is new enough to compile SSSE3/MMXEXT
4387     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4388     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4389
4390     if ! disabled_any asm mmx yasm; then
4391         if check_cmd $yasmexe --version; then
4392             enabled x86_64 && yasm_extra="-m amd64"
4393             yasm_debug="-g dwarf2"
4394         elif check_cmd nasm -v; then
4395             yasmexe=nasm
4396             yasm_debug="-g -F dwarf"
4397             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4398         fi
4399
4400         YASMFLAGS="-f $objformat $yasm_extra"
4401         enabled pic               && append YASMFLAGS "-DPIC"
4402         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4403         case "$objformat" in
4404             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4405         esac
4406
4407         check_yasm "movbe ecx, [5]" && enable yasm ||
4408             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4409         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4410         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4411         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4412         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4413         check_yasm "CPU amdnop" || disable cpunop
4414     fi
4415
4416     case "$cpu" in
4417         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4418             disable fast_clz
4419         ;;
4420     esac
4421
4422 fi
4423
4424 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4425
4426 check_ldflags -Wl,--as-needed
4427
4428 if check_func dlopen; then
4429     ldl=
4430 elif check_func dlopen -ldl; then
4431     ldl=-ldl
4432 fi
4433
4434 if ! disabled network; then
4435     check_func getaddrinfo $network_extralibs
4436     check_func inet_aton $network_extralibs
4437
4438     check_type netdb.h "struct addrinfo"
4439     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4440     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4441     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4442     check_type poll.h "struct pollfd"
4443     check_type netinet/sctp.h "struct sctp_event_subscribe"
4444     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4445     check_type netinet/in.h "struct sockaddr_in6"
4446     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4447     check_type "sys/types.h sys/socket.h" socklen_t
4448
4449     # Prefer arpa/inet.h over winsock2
4450     if check_header arpa/inet.h ; then
4451         check_func closesocket
4452     elif check_header winsock2.h ; then
4453         check_func_headers winsock2.h closesocket -lws2 &&
4454             network_extralibs="-lws2" ||
4455         { check_func_headers winsock2.h closesocket -lws2_32 &&
4456             network_extralibs="-lws2_32"; } || disable winsock2_h network
4457         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4458
4459         check_type ws2tcpip.h socklen_t
4460         check_type ws2tcpip.h "struct addrinfo"
4461         check_type ws2tcpip.h "struct group_source_req"
4462         check_type ws2tcpip.h "struct ip_mreq_source"
4463         check_type ws2tcpip.h "struct ipv6_mreq"
4464         check_type winsock2.h "struct pollfd"
4465         check_struct winsock2.h "struct sockaddr" sa_len
4466         check_type ws2tcpip.h "struct sockaddr_in6"
4467         check_type ws2tcpip.h "struct sockaddr_storage"
4468     else
4469         disable network
4470     fi
4471 fi
4472
4473 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4474 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4475 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4476 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4477
4478 case "$custom_allocator" in
4479     jemalloc)
4480         # jemalloc by default does not use a prefix
4481         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4482     ;;
4483     tcmalloc)
4484         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4485         malloc_prefix=tc_
4486     ;;
4487 esac
4488
4489 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4490 check_func  ${malloc_prefix}memalign            && enable memalign
4491 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4492
4493 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4494     check_func_headers time.h clock_gettime ||
4495         { check_lib time.h clock_gettime -lrt && LIBRT="-lrt"; }
4496
4497 check_func  fcntl
4498 check_func  fork
4499 check_func  gethrtime
4500 check_func  getopt
4501 check_func  getrusage
4502 check_func  gettimeofday
4503 check_func  gmtime_r
4504 check_func  isatty
4505 check_func  localtime_r
4506 check_func  mach_absolute_time
4507 check_func  mkstemp
4508 check_func  mmap
4509 check_func  mprotect
4510 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4511 check_func_headers time.h nanosleep || check_lib time.h nanosleep -lrt
4512 check_func  sched_getaffinity
4513 check_func  setrlimit
4514 check_func  strerror_r
4515 check_func  sysconf
4516 check_func  sysctl
4517 check_func  usleep
4518
4519 check_func_headers io.h setmode
4520 check_func_headers stdlib.h getenv
4521
4522 check_func_headers windows.h GetProcessAffinityMask
4523 check_func_headers windows.h GetProcessTimes
4524 check_func_headers windows.h GetSystemTimeAsFileTime
4525 check_func_headers windows.h LoadLibrary
4526 check_func_headers windows.h MapViewOfFile
4527 check_func_headers windows.h SetConsoleTextAttribute
4528 check_func_headers windows.h Sleep
4529 check_func_headers windows.h VirtualAlloc
4530 check_struct windows.h "CONDITION_VARIABLE" Ptr
4531
4532 check_header d3d11.h
4533 check_header direct.h
4534 check_header dlfcn.h
4535 check_header dxva.h
4536 check_header dxva2api.h
4537 check_header io.h
4538 check_header mach/mach_time.h
4539 check_header malloc.h
4540 check_header poll.h
4541 check_header sys/mman.h
4542 check_header sys/param.h
4543 check_header sys/resource.h
4544 check_header sys/select.h
4545 check_header sys/time.h
4546 check_header sys/un.h
4547 check_header unistd.h
4548 check_header valgrind/valgrind.h
4549 check_header VideoDecodeAcceleration/VDADecoder.h
4550 check_header windows.h
4551 check_header X11/extensions/XvMClib.h
4552
4553 # it seems there are versions of clang in some distros that try to use the
4554 # gcc headers, which explodes for stdatomic
4555 # so we also check that atomics actually work here
4556 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4557
4558 check_lib "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4559 check_lib "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4560 check_lib "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4561
4562 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4563
4564 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4565 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4566 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4567
4568 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4569 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4570 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4571 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4572 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4573
4574 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4575
4576 if ! disabled w32threads && ! enabled pthreads; then
4577     check_func_headers "windows.h process.h" _beginthreadex &&
4578         enable w32threads || disable w32threads
4579 fi
4580
4581 # check for some common methods of building with pthread support
4582 # do this before the optional library checks as some of them require pthreads
4583 if ! disabled pthreads && ! enabled w32threads; then
4584     enable pthreads
4585     if check_lib pthread.h pthread_join -pthread; then
4586         add_cflags -pthread
4587     elif check_lib pthread.h pthread_join -pthreads; then
4588         add_cflags -pthreads
4589     elif check_lib pthread.h pthread_join -lpthreadGC2; then
4590         :
4591     elif check_lib pthread.h pthread_join -lpthread; then
4592         :
4593     elif ! check_func pthread_join; then
4594         disable pthreads
4595     fi
4596 fi
4597
4598 enabled pthreads &&
4599     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4600
4601 disabled  zlib || check_lib  zlib.h      zlibVersion -lz   || disable  zlib
4602 disabled bzlib || check_lib bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4603
4604 check_lib math.h sin -lm && LIBM="-lm"
4605
4606 atan2f_args=2
4607 ldexpf_args=2
4608 powf_args=2
4609
4610 for func in $MATH_FUNCS; do
4611     eval check_mathfunc $func \${${func}_args:-1} $LIBM
4612 done
4613
4614 # these are off by default, so fail if requested and not available
4615 enabled avisynth          && { check_header avisynth/avisynth_c.h || die "ERROR: avisynth/avisynth_c.h header not found"; }
4616 enabled avxsynth          && require avxsynth "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl
4617 enabled cuda              && require cuda cuda.h cuInit -lcuda
4618 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4619 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4620 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4621 enabled libdc1394         && require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new
4622 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4623 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4624 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4625 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4626 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4627 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4628                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4629                                done || die "ERROR: libgsm not found"; }
4630 enabled libhdcd           && require_pkg_config libhdcd "hdcd/hdcd_simple.h" hdcd_new
4631 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4632 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4633 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4634 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4635 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4636 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4637 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4638 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4639 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4640 enabled libopenjpeg       && { check_lib openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4641                                require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4642 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4643 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4644 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4645 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4646 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4647 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4648 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4649 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4650 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4651 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4652 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4653 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4654     enabled libvpx_vp8_decoder && {
4655         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4656             disable libvpx_vp8_decoder;
4657     }
4658     enabled libvpx_vp8_encoder && {
4659         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4660             disable libvpx_vp8_encoder;
4661     }
4662     enabled libvpx_vp9_decoder && {
4663         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4664             disable libvpx_vp9_decoder;
4665     }
4666     enabled libvpx_vp9_encoder && {
4667         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4668             disable libvpx_vp9_encoder;
4669     }
4670     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4671         die "libvpx enabled but no supported decoders found"
4672     fi
4673 }
4674 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4675 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4676 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4677                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4678                                die "ERROR: libx264 version must be >= 0.118."; } &&
4679                              { check_cpp_condition x264.h "X264_MPEG2" &&
4680                                enable libx262; }
4681 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4682                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4683                                die "ERROR: libx265 version must be >= 57."; }
4684 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4685 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4686 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4687                                { ! enabled cross_compile &&
4688                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4689                                  add_ldflags -L/opt/vc/lib/ &&
4690                                  check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4691                                die "ERROR: mmal not found" &&
4692                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4693 enabled omx_rpi           && { check_header OMX_Core.h ||
4694                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4695                                die "ERROR: OpenMAX IL headers not found"; }
4696 enabled omx               && { check_header OMX_Core.h || die "ERROR: OpenMAX IL headers not found"; }
4697 enabled openssl           && { { check_pkg_config openssl openssl/ssl.h OPENSSL_init_ssl ||
4698                                  check_pkg_config openssl openssl/ssl.h SSL_library_init; } && {
4699                                add_cflags $openssl_cflags && add_extralibs $openssl_extralibs; } ||
4700                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4701                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4702                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4703                                die "ERROR: openssl not found"; }
4704
4705 enabled gnutls            && check_lib gmp.h mpz_export -lgmp && enable gmp
4706
4707 if enabled nvenc; then
4708     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4709     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6" ||
4710         die "ERROR: NVENC API version 5 or older is not supported"
4711 fi
4712
4713 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4714     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4715     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4716     enable sdl
4717 fi
4718
4719 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4720 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4721
4722 check_header linux/fb.h
4723 check_header linux/videodev2.h
4724 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4725
4726 check_header AVFoundation/AVFoundation.h
4727
4728 check_header sys/videoio.h
4729
4730 check_lib "windows.h winuser.h" GetShellWindow -luser32
4731 check_lib "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4732 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4733 # w32api 3.12 had it defined wrong
4734 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4735
4736 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4737 { check_header dev/bktr/ioctl_meteor.h &&
4738   check_header dev/bktr/ioctl_bt848.h; } ||
4739 { check_header machine/ioctl_meteor.h &&
4740   check_header machine/ioctl_bt848.h; } ||
4741 { check_header dev/video/meteor/ioctl_meteor.h &&
4742   check_header dev/video/bktr/ioctl_bt848.h; } ||
4743 check_header dev/ic/bt8xx.h
4744
4745 check_header sys/soundcard.h
4746 check_header soundcard.h
4747
4748 enabled_any alsa_indev alsa_outdev &&
4749     check_lib alsa/asoundlib.h snd_pcm_htimestamp -lasound
4750
4751 enabled jack_indev && check_lib jack/jack.h jack_client_open -ljack &&
4752     check_func jack_port_get_latency_range -ljack
4753
4754 enabled_any sndio_indev sndio_outdev && check_lib sndio.h sio_open -lsndio
4755
4756 if enabled libcdio; then
4757     check_lib "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4758     check_lib "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4759     die "ERROR: No usable libcdio/cdparanoia found"
4760 fi
4761
4762 if enabled libxcb; then
4763     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4764         enabled libxcb && die "ERROR: libxcb not found";
4765     } && enable libxcb
4766
4767     disabled libxcb_shm ||
4768         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4769             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4770         } && check_header sys/shm.h && enable libxcb_shm
4771
4772     disabled libxcb_xfixes ||
4773         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4774             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4775         } && enable libxcb_xfixes
4776
4777     add_cflags "$xcb_shape_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4778     add_extralibs "$xcb_shape_extralibs $xcb_shm_extralibs $xcb_xfixes_extralibs"
4779 fi
4780
4781 enabled dxva2 &&
4782     check_lib windows.h CoTaskMemFree -lole32 &&
4783     enable dxva2_lib
4784
4785 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4786
4787 enabled vaapi &&
4788     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4789     disable vaapi
4790
4791 enabled vaapi &&
4792     check_lib "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4793     enable vaapi_drm
4794
4795 enabled vaapi &&
4796     check_lib "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11 &&
4797     enable vaapi_x11
4798
4799 enabled vdpau &&
4800     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4801     disable vdpau
4802
4803 enabled vdpau &&
4804     check_lib "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11 &&
4805     enable vdpau_x11
4806
4807 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4808
4809 # add some useful compiler flags if supported
4810 check_cflags -Wdeclaration-after-statement
4811 check_cflags -Wall
4812 check_cflags -Wdisabled-optimization
4813 check_cflags -Wpointer-arith
4814 check_cflags -Wredundant-decls
4815 check_cflags -Wwrite-strings
4816 check_cflags -Wtype-limits
4817 check_cflags -Wundef
4818 check_cflags -Wmissing-prototypes
4819 check_cflags -Wstrict-prototypes
4820
4821 if enabled extra_warnings; then
4822     check_cflags -Wcast-qual
4823     check_cflags -Wextra
4824     check_cflags -Wpedantic
4825 fi
4826
4827 check_disable_warning(){
4828     warning_flag=-W${1#-Wno-}
4829     test_cflags $warning_flag && add_cflags $1
4830 }
4831
4832 check_disable_warning -Wno-parentheses
4833 check_disable_warning -Wno-switch
4834 check_disable_warning -Wno-format-zero-length
4835 check_disable_warning -Wno-pointer-sign
4836
4837 check_disable_warning_headers(){
4838     warning_flag=-W${1#-Wno-}
4839     test_cflags $warning_flag && add_cflags_headers $1
4840 }
4841
4842 check_disable_warning_headers -Wno-deprecated-declarations
4843 check_disable_warning_headers -Wno-unused-variable
4844
4845 check_objcflags -fobjc-arc && enable objc_arc
4846
4847 # add some linker flags
4848 check_ldflags -Wl,--warn-common
4849 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample