doc/APIchanges: Fill in the xx
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # FFmpeg 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 FFMPEG, 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 FFmpeg."
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:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --fatal-warnings         fail if any configure warning is generated
82   --prefix=PREFIX          install in PREFIX [$prefix]
83   --bindir=DIR             install binaries in DIR [PREFIX/bin]
84   --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]
85   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]
86   --libdir=DIR             install libs in DIR [PREFIX/lib]
87   --shlibdir=DIR           install shared libs in DIR [LIBDIR]
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 to allow installing libraries in paths
91                            not part of the dynamic linker search path
92                            use rpath when linking programs [USE WITH CARE]
93
94 Licensing options:
95   --enable-gpl             allow use of GPL code, the resulting libs
96                            and binaries will be under GPL [no]
97   --enable-version3        upgrade (L)GPL to version 3 [no]
98   --enable-nonfree         allow use of nonfree code, the resulting libs
99                            and binaries will be unredistributable [no]
100
101 Configuration options:
102   --disable-static         do not build static libraries [no]
103   --enable-shared          build shared libraries [no]
104   --enable-small           optimize for size instead of speed
105   --disable-runtime-cpudetect disable detecting cpu capabilities at runtime (smaller binary)
106   --enable-gray            enable full grayscale support (slower color)
107   --disable-swscale-alpha  disable alpha channel support in swscale
108   --disable-all            disable building components, libraries and programs
109   --enable-incompatible-libav-abi enable incompatible Libav fork ABI [no]
110   --enable-raise-major     increase major version numbers in sonames [no]
111
112 Program options:
113   --disable-programs       do not build command line programs
114   --disable-ffmpeg         disable ffmpeg build
115   --disable-ffplay         disable ffplay build
116   --disable-ffprobe        disable ffprobe build
117   --disable-ffserver       disable ffserver build
118
119 Documentation options:
120   --disable-doc            do not build documentation
121   --disable-htmlpages      do not build HTML documentation pages
122   --disable-manpages       do not build man documentation pages
123   --disable-podpages       do not build POD documentation pages
124   --disable-txtpages       do not build text documentation pages
125
126 Component options:
127   --disable-avdevice       disable libavdevice build
128   --disable-avcodec        disable libavcodec build
129   --disable-avformat       disable libavformat build
130   --disable-avutil         disable libavutil build
131   --disable-swresample     disable libswresample build
132   --disable-swscale        disable libswscale build
133   --disable-postproc       disable libpostproc build
134   --disable-avfilter       disable libavfilter build
135   --enable-avresample      enable libavresample build [no]
136   --disable-pthreads       disable pthreads [autodetect]
137   --disable-w32threads     disable Win32 threads [autodetect]
138   --disable-os2threads     disable OS/2 threads [autodetect]
139   --disable-network        disable network support [no]
140   --disable-dct            disable DCT code
141   --disable-dwt            disable DWT code
142   --disable-error-resilience disable error resilience code
143   --disable-lsp            disable LSP code
144   --disable-lzo            disable LZO decoder code
145   --disable-mdct           disable MDCT code
146   --disable-rdft           disable RDFT code
147   --disable-fft            disable FFT code
148   --disable-faan           disable floating point AAN (I)DCT code
149   --disable-pixelutils     disable pixel utils in libavutil
150
151 Hardware accelerators:
152   --disable-dxva2          disable DXVA2 code [autodetect]
153   --disable-vaapi          disable VAAPI code [autodetect]
154   --disable-vda            disable VDA code [autodetect]
155   --disable-vdpau          disable VDPAU code [autodetect]
156
157 Individual component options:
158   --disable-everything     disable all components listed below
159   --disable-encoder=NAME   disable encoder NAME
160   --enable-encoder=NAME    enable encoder NAME
161   --disable-encoders       disable all encoders
162   --disable-decoder=NAME   disable decoder NAME
163   --enable-decoder=NAME    enable decoder NAME
164   --disable-decoders       disable all decoders
165   --disable-hwaccel=NAME   disable hwaccel NAME
166   --enable-hwaccel=NAME    enable hwaccel NAME
167   --disable-hwaccels       disable all hwaccels
168   --disable-muxer=NAME     disable muxer NAME
169   --enable-muxer=NAME      enable muxer NAME
170   --disable-muxers         disable all muxers
171   --disable-demuxer=NAME   disable demuxer NAME
172   --enable-demuxer=NAME    enable demuxer NAME
173   --disable-demuxers       disable all demuxers
174   --enable-parser=NAME     enable parser NAME
175   --disable-parser=NAME    disable parser NAME
176   --disable-parsers        disable all parsers
177   --enable-bsf=NAME        enable bitstream filter NAME
178   --disable-bsf=NAME       disable bitstream filter NAME
179   --disable-bsfs           disable all bitstream filters
180   --enable-protocol=NAME   enable protocol NAME
181   --disable-protocol=NAME  disable protocol NAME
182   --disable-protocols      disable all protocols
183   --enable-indev=NAME      enable input device NAME
184   --disable-indev=NAME     disable input device NAME
185   --disable-indevs         disable input devices
186   --enable-outdev=NAME     enable output device NAME
187   --disable-outdev=NAME    disable output device NAME
188   --disable-outdevs        disable output devices
189   --disable-devices        disable all devices
190   --enable-filter=NAME     enable filter NAME
191   --disable-filter=NAME    disable filter NAME
192   --disable-filters        disable all filters
193
194 External library support:
195   --enable-avisynth        enable reading of AviSynth script files [no]
196   --disable-bzlib          disable bzlib [autodetect]
197   --enable-fontconfig      enable fontconfig, useful for drawtext filter [no]
198   --enable-frei0r          enable frei0r video filtering [no]
199   --enable-gnutls          enable gnutls, needed for https support
200                            if openssl is not used [no]
201   --disable-iconv          disable iconv [autodetect]
202   --enable-ladspa          enable LADSPA audio filtering [no]
203   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
204   --enable-libass          enable libass subtitles rendering,
205                            needed for subtitles and ass filter [no]
206   --enable-libbluray       enable BluRay reading using libbluray [no]
207   --enable-libbs2b         enable bs2b DSP library [no]
208   --enable-libcaca         enable textual display using libcaca [no]
209   --enable-libcelt         enable CELT decoding via libcelt [no]
210   --enable-libcdio         enable audio CD grabbing with libcdio [no]
211   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
212                            and libraw1394 [no]
213   --enable-libfaac         enable AAC encoding via libfaac [no]
214   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
215   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
216   --enable-libfreetype     enable libfreetype, needed for drawtext filter [no]
217   --enable-libfribidi      enable libfribidi, improves drawtext filter [no]
218   --enable-libgme          enable Game Music Emu via libgme [no]
219   --enable-libgsm          enable GSM de/encoding via libgsm [no]
220   --enable-libiec61883     enable iec61883 via libiec61883 [no]
221   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
222   --enable-libmfx          enable HW acceleration through libmfx
223   --enable-libmodplug      enable ModPlug via libmodplug [no]
224   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
225   --enable-libnut          enable NUT (de)muxing via libnut,
226                            native (de)muxer exists [no]
227   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
228   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
229   --enable-libopencv       enable video filtering via libopencv [no]
230   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
231   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
232   --enable-libopus         enable Opus de/encoding via libopus [no]
233   --enable-libpulse        enable Pulseaudio input via libpulse [no]
234   --enable-libquvi         enable quvi input via libquvi [no]
235   --enable-librtmp         enable RTMP[E] support via librtmp [no]
236   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
237   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
238   --enable-libsmbclient    enable Samba protocol via libsmbclient [no]
239   --enable-libsoxr         enable Include libsoxr resampling [no]
240   --enable-libspeex        enable Speex de/encoding via libspeex [no]
241   --enable-libssh          enable SFTP protocol via libssh [no]
242   --enable-libstagefright-h264  enable H.264 decoding via libstagefright [no]
243   --enable-libtheora       enable Theora encoding via libtheora [no]
244   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
245   --enable-libutvideo      enable Ut Video encoding and decoding via libutvideo [no]
246   --enable-libv4l2         enable libv4l2/v4l-utils [no]
247   --enable-libvidstab      enable video stabilization using vid.stab [no]
248   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
249   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
250   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
251                            native implementation exists [no]
252   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
253   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
254   --enable-libwebp         enable WebP encoding via libwebp [no]
255   --enable-libx264         enable H.264 encoding via x264 [no]
256   --enable-libx265         enable HEVC encoding via x265 [no]
257   --enable-libxavs         enable AVS encoding via xavs [no]
258   --enable-libxcb          enable X11 grabbing using XCB [autodetect]
259   --enable-libxcb-shm      enable X11 grabbing shm communication [autodetect]
260   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [autodetect]
261   --enable-libxcb-shape    enable X11 grabbing shape rendering [autodetect]
262   --enable-libxvid         enable Xvid encoding via xvidcore,
263                            native MPEG-4/Xvid encoder exists [no]
264   --enable-libzmq          enable message passing via libzmq [no]
265   --enable-libzvbi         enable teletext support via libzvbi [no]
266   --disable-lzma           disable lzma [autodetect]
267   --enable-decklink        enable Blackmagick DeckLink I/O support [no]
268   --enable-nvenc           enable NVIDIA NVENC support [no]
269   --enable-openal          enable OpenAL 1.1 capture support [no]
270   --enable-opencl          enable OpenCL code
271   --enable-opengl          enable OpenGL rendering [no]
272   --enable-openssl         enable openssl, needed for https support
273                            if gnutls is not used [no]
274   --disable-sdl            disable sdl [autodetect]
275   --enable-x11grab         enable X11 grabbing (legacy) [no]
276   --disable-xlib           disable xlib [autodetect]
277   --disable-zlib           disable zlib [autodetect]
278
279 Toolchain options:
280   --arch=ARCH              select architecture [$arch]
281   --cpu=CPU                select the minimum required CPU (affects
282                            instruction selection, may crash on older CPUs)
283   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
284   --progs-suffix=SUFFIX    program name suffix []
285   --enable-cross-compile   assume a cross-compiler is used
286   --sysroot=PATH           root of cross-build tree
287   --sysinclude=PATH        location of cross-build system headers
288   --target-os=OS           compiler targets OS [$target_os]
289   --target-exec=CMD        command to run executables on target
290   --target-path=DIR        path to view of build directory on target
291   --target-samples=DIR     path to samples directory on target
292   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
293   --toolchain=NAME         set tool defaults according to NAME
294   --nm=NM                  use nm tool NM [$nm_default]
295   --ar=AR                  use archive tool AR [$ar_default]
296   --as=AS                  use assembler AS [$as_default]
297   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
298   --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]
299   --cc=CC                  use C compiler CC [$cc_default]
300   --cxx=CXX                use C compiler CXX [$cxx_default]
301   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
302   --ld=LD                  use linker LD [$ld_default]
303   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
304   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
305   --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
306   --doxygen=DOXYGEN        use DOXYGEN to generate API doc [$doxygen_default]
307   --host-cc=HOSTCC         use host C compiler HOSTCC
308   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
309   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
310   --host-ld=HOSTLD         use host linker HOSTLD
311   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
312   --host-libs=HLIBS        use libs HLIBS when linking for host
313   --host-os=OS             compiler host OS [$target_os]
314   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
315   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
316   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
317   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
318   --extra-libs=ELIBS       add ELIBS [$ELIBS]
319   --extra-version=STRING   version string suffix []
320   --optflags=OPTFLAGS      override optimization-related compiler flags
321   --build-suffix=SUFFIX    library name suffix []
322   --enable-pic             build position-independent code
323   --enable-thumb           compile for Thumb instruction set
324   --enable-lto             use link-time optimization
325
326 Advanced options (experts only):
327   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
328   --disable-symver         disable symbol versioning
329   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
330   --disable-safe-bitstream-reader
331                            disable buffer boundary checking in bitreaders
332                            (faster, but may crash)
333   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
334   --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
335
336 Optimization options (experts only):
337   --disable-asm            disable all assembly optimizations
338   --disable-altivec        disable AltiVec optimizations
339   --disable-amd3dnow       disable 3DNow! optimizations
340   --disable-amd3dnowext    disable 3DNow! extended optimizations
341   --disable-mmx            disable MMX optimizations
342   --disable-mmxext         disable MMXEXT optimizations
343   --disable-sse            disable SSE optimizations
344   --disable-sse2           disable SSE2 optimizations
345   --disable-sse3           disable SSE3 optimizations
346   --disable-ssse3          disable SSSE3 optimizations
347   --disable-sse4           disable SSE4 optimizations
348   --disable-sse42          disable SSE4.2 optimizations
349   --disable-avx            disable AVX optimizations
350   --disable-xop            disable XOP optimizations
351   --disable-fma3           disable FMA3 optimizations
352   --disable-fma4           disable FMA4 optimizations
353   --disable-avx2           disable AVX2 optimizations
354   --disable-armv5te        disable armv5te optimizations
355   --disable-armv6          disable armv6 optimizations
356   --disable-armv6t2        disable armv6t2 optimizations
357   --disable-vfp            disable VFP optimizations
358   --disable-neon           disable NEON optimizations
359   --disable-inline-asm     disable use of inline assembly
360   --disable-yasm           disable use of nasm/yasm assembly
361   --disable-mipsdspr1      disable MIPS DSP ASE R1 optimizations
362   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
363   --disable-mipsfpu        disable floating point MIPS optimizations
364   --disable-fast-unaligned consider unaligned accesses slow
365
366 Developer options (useful when working on FFmpeg itself):
367   --disable-debug          disable debugging symbols
368   --enable-debug=LEVEL     set the debug level [$debuglevel]
369   --disable-optimizations  disable compiler optimizations
370   --enable-extra-warnings  enable more compiler warnings
371   --disable-stripping      disable stripping of executables and shared libraries
372   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
373                            2 causes a slowdown at runtime.
374   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
375   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
376                            leaks and errors, using the specified valgrind binary.
377                            Cannot be combined with --target-exec
378   --enable-ftrapv          Trap arithmetic overflows
379   --samples=PATH           location of test samples for FATE, if not set use
380                            \$FATE_SAMPLES at make invocation time.
381   --enable-neon-clobber-test check NEON registers for clobbering (should be
382                            used only for debugging purposes)
383   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
384                            should be used only for debugging purposes)
385   --enable-random          randomly enable/disable components
386   --disable-random
387   --enable-random=LIST     randomly enable/disable specific components or
388   --disable-random=LIST    component groups. LIST is a comma-separated list
389                            of NAME[:PROB] entries where NAME is a component
390                            (group) and PROB the probability associated with
391                            NAME (default 0.5).
392   --random-seed=VALUE      seed value for --enable/disable-random
393
394 NOTE: Object files are built at the place where configure is launched.
395 EOF
396   exit 0
397 }
398
399 quotes='""'
400
401 log(){
402     echo "$@" >> $logfile
403 }
404
405 log_file(){
406     log BEGIN $1
407     pr -n -t $1 >> $logfile
408     log END $1
409 }
410
411 echolog(){
412     log "$@"
413     echo "$@"
414 }
415
416 warn(){
417     log "WARNING: $*"
418     WARNINGS="${WARNINGS}WARNING: $*\n"
419 }
420
421 die(){
422     echolog "$@"
423     cat <<EOF
424
425 If you think configure made a mistake, make sure you are using the latest
426 version from Git.  If the latest version fails, report the problem to the
427 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
428 EOF
429     if disabled logging; then
430         cat <<EOF
431 Rerun configure with logging enabled (do not use --disable-logging), and
432 include the log this produces with your report.
433 EOF
434     else
435         cat <<EOF
436 Include the log file "$logfile" produced by configure as this will help
437 solve the problem.
438 EOF
439     fi
440     exit 1
441 }
442
443 # Avoid locale weirdness, besides we really just want to translate ASCII.
444 toupper(){
445     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
446 }
447
448 tolower(){
449     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
450 }
451
452 c_escape(){
453     echo "$*" | sed 's/["\\]/\\\0/g'
454 }
455
456 sh_quote(){
457     v=$(echo "$1" | sed "s/'/'\\\\''/g")
458     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
459     echo "$v"
460 }
461
462 cleanws(){
463     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//;s/\\r//g'
464 }
465
466 filter(){
467     pat=$1
468     shift
469     for v; do
470         eval "case $v in $pat) echo $v ;; esac"
471     done
472 }
473
474 filter_out(){
475     pat=$1
476     shift
477     for v; do
478         eval "case $v in $pat) ;; *) echo $v ;; esac"
479     done
480 }
481
482 map(){
483     m=$1
484     shift
485     for v; do eval $m; done
486 }
487
488 add_suffix(){
489     suffix=$1
490     shift
491     for v; do echo ${v}${suffix}; done
492 }
493
494 set_all(){
495     value=$1
496     shift
497     for var in $*; do
498         eval $var=$value
499     done
500 }
501
502 set_weak(){
503     value=$1
504     shift
505     for var; do
506         eval : \${$var:=$value}
507     done
508 }
509
510 sanitize_var_name(){
511     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
512 }
513
514 set_safe(){
515     var=$1
516     shift
517     eval $(sanitize_var_name "$var")='$*'
518 }
519
520 get_safe(){
521     eval echo \$$(sanitize_var_name "$1")
522 }
523
524 pushvar(){
525     for pvar in $*; do
526         eval level=\${${pvar}_level:=0}
527         eval ${pvar}_${level}="\$$pvar"
528         eval ${pvar}_level=$(($level+1))
529     done
530 }
531
532 popvar(){
533     for pvar in $*; do
534         eval level=\${${pvar}_level:-0}
535         test $level = 0 && continue
536         eval level=$(($level-1))
537         eval $pvar="\${${pvar}_${level}}"
538         eval ${pvar}_level=$level
539         eval unset ${pvar}_${level}
540     done
541 }
542
543 enable(){
544     set_all yes $*
545 }
546
547 disable(){
548     set_all no $*
549 }
550
551 enable_weak(){
552     set_weak yes $*
553 }
554
555 disable_weak(){
556     set_weak no $*
557 }
558
559 enable_safe(){
560     for var; do
561         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
562     done
563 }
564
565 disable_safe(){
566     for var; do
567         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
568     done
569 }
570
571 do_enable_deep(){
572     for var; do
573         enabled $var && continue
574         eval sel="\$${var}_select"
575         eval sgs="\$${var}_suggest"
576         pushvar var sgs
577         enable_deep $sel
578         popvar sgs
579         enable_deep_weak $sgs
580         popvar var
581     done
582 }
583
584 enable_deep(){
585     do_enable_deep $*
586     enable $*
587 }
588
589 enable_deep_weak(){
590     for var; do
591         disabled $var && continue
592         pushvar var
593         do_enable_deep $var
594         popvar var
595         enable_weak $var
596     done
597 }
598
599 enabled(){
600     test "${1#!}" = "$1" && op== || op=!=
601     eval test "x\$${1#!}" $op "xyes"
602 }
603
604 disabled(){
605     test "${1#!}" = "$1" && op== || op=!=
606     eval test "x\$${1#!}" $op "xno"
607 }
608
609 enabled_all(){
610     for opt; do
611         enabled $opt || return 1
612     done
613 }
614
615 disabled_all(){
616     for opt; do
617         disabled $opt || return 1
618     done
619 }
620
621 enabled_any(){
622     for opt; do
623         enabled $opt && return 0
624     done
625 }
626
627 disabled_any(){
628     for opt; do
629         disabled $opt && return 0
630     done
631     return 1
632 }
633
634 set_default(){
635     for opt; do
636         eval : \${$opt:=\$${opt}_default}
637     done
638 }
639
640 is_in(){
641     value=$1
642     shift
643     for var in $*; do
644         [ $var = $value ] && return 0
645     done
646     return 1
647 }
648
649 do_check_deps(){
650     for cfg; do
651         cfg="${cfg#!}"
652         enabled ${cfg}_checking && die "Circular dependency for $cfg."
653         disabled ${cfg}_checking && continue
654         enable ${cfg}_checking
655         append allopts $cfg
656
657         eval dep_all="\$${cfg}_deps"
658         eval dep_any="\$${cfg}_deps_any"
659         eval dep_sel="\$${cfg}_select"
660         eval dep_sgs="\$${cfg}_suggest"
661         eval dep_ifa="\$${cfg}_if"
662         eval dep_ifn="\$${cfg}_if_any"
663
664         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
665         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
666         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
667
668         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
669         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
670         enabled_all  $dep_all || disable $cfg
671         enabled_any  $dep_any || disable $cfg
672         disabled_any $dep_sel && disable $cfg
673
674         if enabled $cfg; then
675             enable_deep $dep_sel
676             enable_deep_weak $dep_sgs
677         fi
678
679         disable ${cfg}_checking
680     done
681 }
682
683 check_deps(){
684     unset allopts
685
686     do_check_deps "$@"
687
688     for cfg in $allopts; do
689         enabled $cfg || continue
690         eval dep_extralibs="\$${cfg}_extralibs"
691         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
692     done
693 }
694
695 print_config(){
696     pfx=$1
697     files=$2
698     shift 2
699     map 'eval echo "$v \${$v:-no}"' "$@" |
700     awk "BEGIN { split(\"$files\", files) }
701         {
702             c = \"$pfx\" toupper(\$1);
703             v = \$2;
704             sub(/yes/, 1, v);
705             sub(/no/,  0, v);
706             for (f in files) {
707                 file = files[f];
708                 if (file ~ /\\.h\$/) {
709                     printf(\"#define %s %d\\n\", c, v) >>file;
710                 } else if (file ~ /\\.asm\$/) {
711                     printf(\"%%define %s %d\\n\", c, v) >>file;
712                 } else if (file ~ /\\.mak\$/) {
713                     n = -v ? \"\" : \"!\";
714                     printf(\"%s%s=yes\\n\", n, c) >>file;
715                 } else if (file ~ /\\.texi\$/) {
716                     pre = -v ? \"\" : \"@c \";
717                     yesno = \$2;
718                     c2 = tolower(c);
719                     gsub(/_/, \"-\", c2);
720                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
721                 }
722             }
723         }"
724 }
725
726 print_enabled(){
727     suf=$1
728     shift
729     for v; do
730         enabled $v && printf "%s\n" ${v%$suf};
731     done
732 }
733
734 append(){
735     var=$1
736     shift
737     eval "$var=\"\$$var $*\""
738 }
739
740 prepend(){
741     var=$1
742     shift
743     eval "$var=\"$* \$$var\""
744 }
745
746 unique(){
747     var=$1
748     uniq_list=""
749     for tok in $(eval echo \$$var); do
750         uniq_list="$(filter_out $tok $uniq_list) $tok"
751     done
752     eval "$var=\"${uniq_list}\""
753 }
754
755 add_cppflags(){
756     append CPPFLAGS "$@"
757 }
758
759 add_cflags(){
760     append CFLAGS $($cflags_filter "$@")
761 }
762
763 add_cxxflags(){
764     append CXXFLAGS $($cflags_filter "$@")
765 }
766
767 add_asflags(){
768     append ASFLAGS $($asflags_filter "$@")
769 }
770
771 add_ldflags(){
772     append LDFLAGS $($ldflags_filter "$@")
773 }
774
775 add_ldexeflags(){
776     append LDEXEFLAGS $($ldflags_filter "$@")
777 }
778
779 add_stripflags(){
780     append ASMSTRIPFLAGS "$@"
781 }
782
783 add_extralibs(){
784     prepend extralibs $($ldflags_filter "$@")
785 }
786
787 add_host_cppflags(){
788     append host_cppflags "$@"
789 }
790
791 add_host_cflags(){
792     append host_cflags $($host_cflags_filter "$@")
793 }
794
795 add_host_ldflags(){
796     append host_ldflags $($host_ldflags_filter "$@")
797 }
798
799 add_compat(){
800     append compat_objs $1
801     shift
802     map 'add_cppflags -D$v' "$@"
803 }
804
805 check_cmd(){
806     log "$@"
807     "$@" >> $logfile 2>&1
808 }
809
810 check_stat(){
811     log check_stat "$@"
812     stat "$1" >> $logfile 2>&1
813 }
814
815 cc_o(){
816     eval printf '%s\\n' $CC_O
817 }
818
819 cc_e(){
820     eval printf '%s\\n' $CC_E
821 }
822
823 check_cc(){
824     log check_cc "$@"
825     cat > $TMPC
826     log_file $TMPC
827     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
828 }
829
830 check_cxx(){
831     log check_cxx "$@"
832     cat > $TMPCPP
833     log_file $TMPCPP
834     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
835 }
836
837 check_oc(){
838     log check_oc "$@"
839     cat > $TMPM
840     log_file $TMPM
841     check_cmd $cc -Werror=missing-prototypes $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPM
842 }
843
844 check_cpp(){
845     log check_cpp "$@"
846     cat > $TMPC
847     log_file $TMPC
848     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
849 }
850
851 as_o(){
852     eval printf '%s\\n' $AS_O
853 }
854
855 check_as(){
856     log check_as "$@"
857     cat > $TMPS
858     log_file $TMPS
859     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
860 }
861
862 check_inline_asm(){
863     log check_inline_asm "$@"
864     name="$1"
865     code="$2"
866     shift 2
867     disable $name
868     check_cc "$@" <<EOF && enable $name
869 void foo(void){ __asm__ volatile($code); }
870 EOF
871 }
872
873 check_insn(){
874     log check_insn "$@"
875     check_inline_asm ${1}_inline "\"$2\""
876     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
877 }
878
879 check_yasm(){
880     log check_yasm "$@"
881     echo "$1" > $TMPS
882     log_file $TMPS
883     shift 1
884     check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS
885 }
886
887 ld_o(){
888     eval printf '%s\\n' $LD_O
889 }
890
891 check_ld(){
892     log check_ld "$@"
893     type=$1
894     shift 1
895     flags=$(filter_out '-l*|*.so' $@)
896     libs=$(filter '-l*|*.so' $@)
897     check_$type $($cflags_filter $flags) || return
898     flags=$($ldflags_filter $flags)
899     libs=$($ldflags_filter $libs)
900     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
901 }
902
903 print_include(){
904     hdr=$1
905     test "${hdr%.h}" = "${hdr}" &&
906         echo "#include $hdr"    ||
907         echo "#include <$hdr>"
908 }
909
910 check_code(){
911     log check_code "$@"
912     check=$1
913     headers=$2
914     code=$3
915     shift 3
916     {
917         for hdr in $headers; do
918             print_include $hdr
919         done
920         echo "int main(void) { $code; return 0; }"
921     } | check_$check "$@"
922 }
923
924 check_cppflags(){
925     log check_cppflags "$@"
926     check_cc "$@" <<EOF && append CPPFLAGS "$@"
927 int x;
928 EOF
929 }
930
931 test_cflags(){
932     log test_cflags "$@"
933     set -- $($cflags_filter "$@")
934     check_cc "$@" <<EOF
935 int x;
936 EOF
937 }
938
939 check_cflags(){
940     log check_cflags "$@"
941     test_cflags "$@" && add_cflags "$@"
942 }
943
944 check_cxxflags(){
945     log check_cxxflags "$@"
946     set -- $($cflags_filter "$@")
947     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
948 int x;
949 EOF
950 }
951
952 test_ldflags(){
953     log test_ldflags "$@"
954     check_ld "cc" "$@" <<EOF
955 int main(void){ return 0; }
956 EOF
957 }
958
959 check_ldflags(){
960     log check_ldflags "$@"
961     test_ldflags "$@" && add_ldflags "$@"
962 }
963
964 test_stripflags(){
965     log test_stripflags "$@"
966     # call check_cc to get a fresh TMPO
967     check_cc <<EOF
968 int main(void) { return 0; }
969 EOF
970     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
971 }
972
973 check_stripflags(){
974     log check_stripflags "$@"
975     test_stripflags "$@" && add_stripflags "$@"
976 }
977
978 check_header(){
979     log check_header "$@"
980     header=$1
981     shift
982     disable_safe $header
983     check_cpp "$@" <<EOF && enable_safe $header
984 #include <$header>
985 int x;
986 EOF
987 }
988
989 check_header_oc(){
990     log check_header_oc "$@"
991     rm -f -- "$TMPO"
992     header=$1
993     shift
994     disable_safe $header
995     {
996        echo "#include <$header>"
997        echo "int main(void) { return 0; }"
998     } | check_oc && check_stat "$TMPO" && enable_safe $headers
999 }
1000
1001 check_func(){
1002     log check_func "$@"
1003     func=$1
1004     shift
1005     disable $func
1006     check_ld "cc" "$@" <<EOF && enable $func
1007 extern int $func();
1008 int main(void){ $func(); }
1009 EOF
1010 }
1011
1012 check_mathfunc(){
1013     log check_mathfunc "$@"
1014     func=$1
1015     narg=$2
1016     shift 2
1017     test $narg = 2 && args="f, g" || args="f"
1018     disable $func
1019     check_ld "cc" "$@" <<EOF && enable $func
1020 #include <math.h>
1021 float foo(float f, float g) { return $func($args); }
1022 int main(void){ return (int) foo; }
1023 EOF
1024 }
1025
1026 check_func_headers(){
1027     log check_func_headers "$@"
1028     headers=$1
1029     funcs=$2
1030     shift 2
1031     {
1032         for hdr in $headers; do
1033             print_include $hdr
1034         done
1035         for func in $funcs; do
1036             echo "long check_$func(void) { return (long) $func; }"
1037         done
1038         echo "int main(void) { return 0; }"
1039     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
1040 }
1041
1042 check_class_headers_cpp(){
1043     log check_class_headers_cpp "$@"
1044     headers=$1
1045     classes=$2
1046     shift 2
1047     {
1048         for hdr in $headers; do
1049             echo "#include <$hdr>"
1050         done
1051         echo "int main(void) { "
1052         i=1
1053         for class in $classes; do
1054             echo "$class obj$i;"
1055             i=$(expr $i + 1)
1056         done
1057         echo "return 0; }"
1058     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
1059 }
1060
1061 check_cpp_condition(){
1062     log check_cpp_condition "$@"
1063     header=$1
1064     condition=$2
1065     shift 2
1066     check_cpp "$@" <<EOF
1067 #include <$header>
1068 #if !($condition)
1069 #error "unsatisfied condition: $condition"
1070 #endif
1071 EOF
1072 }
1073
1074 check_lib(){
1075     log check_lib "$@"
1076     header="$1"
1077     func="$2"
1078     shift 2
1079     check_header $header && check_func $func "$@" && add_extralibs "$@"
1080 }
1081
1082 check_lib2(){
1083     log check_lib2 "$@"
1084     headers="$1"
1085     funcs="$2"
1086     shift 2
1087     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1088 }
1089
1090 check_lib_cpp(){
1091     log check_lib_cpp "$@"
1092     headers="$1"
1093     classes="$2"
1094     shift 2
1095     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1096 }
1097
1098 check_pkg_config(){
1099     log check_pkg_config "$@"
1100     pkgandversion="$1"
1101     pkg="${1%% *}"
1102     headers="$2"
1103     funcs="$3"
1104     shift 3
1105     check_cmd $pkg_config --exists --print-errors $pkgandversion || return
1106     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1107     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1108     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1109         set_safe ${pkg}_cflags $pkg_cflags   &&
1110         set_safe ${pkg}_libs   $pkg_libs
1111 }
1112
1113 check_exec(){
1114     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1115 }
1116
1117 check_exec_crash(){
1118     code=$(cat)
1119
1120     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1121     # are safe but may not be available everywhere.  Thus we use
1122     # raise(SIGTERM) instead.  The check is run in a subshell so we
1123     # can redirect the "Terminated" message from the shell.  SIGBUS
1124     # is not defined by standard C so it is used conditionally.
1125
1126     (check_exec "$@") >> $logfile 2>&1 <<EOF
1127 #include <signal.h>
1128 static void sighandler(int sig){
1129     raise(SIGTERM);
1130 }
1131 int foo(void){
1132     $code
1133 }
1134 int (*func_ptr)(void) = foo;
1135 int main(void){
1136     signal(SIGILL, sighandler);
1137     signal(SIGFPE, sighandler);
1138     signal(SIGSEGV, sighandler);
1139 #ifdef SIGBUS
1140     signal(SIGBUS, sighandler);
1141 #endif
1142     return func_ptr();
1143 }
1144 EOF
1145 }
1146
1147 check_type(){
1148     log check_type "$@"
1149     headers=$1
1150     type=$2
1151     shift 2
1152     disable_safe "$type"
1153     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1154 }
1155
1156 check_struct(){
1157     log check_struct "$@"
1158     headers=$1
1159     struct=$2
1160     member=$3
1161     shift 3
1162     disable_safe "${struct}_${member}"
1163     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1164         enable_safe "${struct}_${member}"
1165 }
1166
1167 check_builtin(){
1168     log check_builtin "$@"
1169     name=$1
1170     headers=$2
1171     builtin=$3
1172     shift 3
1173     disable "$name"
1174     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1175 }
1176
1177 check_compile_assert(){
1178     log check_compile_assert "$@"
1179     name=$1
1180     headers=$2
1181     condition=$3
1182     shift 3
1183     disable "$name"
1184     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1185 }
1186
1187 require(){
1188     name="$1"
1189     header="$2"
1190     func="$3"
1191     shift 3
1192     check_lib $header $func "$@" || die "ERROR: $name not found"
1193 }
1194
1195 require2(){
1196     name="$1"
1197     headers="$2"
1198     func="$3"
1199     shift 3
1200     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1201 }
1202
1203 require_cpp(){
1204     name="$1"
1205     headers="$2"
1206     classes="$3"
1207     shift 3
1208     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1209 }
1210
1211 use_pkg_config(){
1212     pkg="$1"
1213     check_pkg_config "$@" || return 1
1214     add_cflags    $(get_safe ${pkg}_cflags)
1215     add_extralibs $(get_safe ${pkg}_libs)
1216 }
1217
1218 require_pkg_config(){
1219     use_pkg_config "$@" || die "ERROR: $pkg not found using pkg-config$pkg_config_fail_message"
1220 }
1221
1222 require_libfreetype(){
1223     log require_libfreetype "$@"
1224     pkg="freetype2"
1225     check_cmd $pkg_config --exists --print-errors $pkg \
1226       || die "ERROR: $pkg not found"
1227     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1228     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1229     {
1230         echo "#include <ft2build.h>"
1231         echo "#include FT_FREETYPE_H"
1232         echo "long check_func(void) { return (long) FT_Init_FreeType; }"
1233         echo "int main(void) { return 0; }"
1234     } | check_ld "cc" $pkg_cflags $pkg_libs \
1235       && set_safe ${pkg}_cflags $pkg_cflags \
1236       && set_safe ${pkg}_libs   $pkg_libs \
1237       || die "ERROR: $pkg not found"
1238     add_cflags    $(get_safe ${pkg}_cflags)
1239     add_extralibs $(get_safe ${pkg}_libs)
1240 }
1241
1242 hostcc_e(){
1243     eval printf '%s\\n' $HOSTCC_E
1244 }
1245
1246 hostcc_o(){
1247     eval printf '%s\\n' $HOSTCC_O
1248 }
1249
1250 check_host_cc(){
1251     log check_host_cc "$@"
1252     cat > $TMPC
1253     log_file $TMPC
1254     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1255 }
1256
1257 check_host_cpp(){
1258     log check_host_cpp "$@"
1259     cat > $TMPC
1260     log_file $TMPC
1261     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1262 }
1263
1264 check_host_cppflags(){
1265     log check_host_cppflags "$@"
1266     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1267 int x;
1268 EOF
1269 }
1270
1271 check_host_cflags(){
1272     log check_host_cflags "$@"
1273     set -- $($host_cflags_filter "$@")
1274     check_host_cc "$@" <<EOF && append host_cflags "$@"
1275 int x;
1276 EOF
1277 }
1278
1279 check_host_cpp_condition(){
1280     log check_host_cpp_condition "$@"
1281     header=$1
1282     condition=$2
1283     shift 2
1284     check_host_cpp "$@" <<EOF
1285 #include <$header>
1286 #if !($condition)
1287 #error "unsatisfied condition: $condition"
1288 #endif
1289 EOF
1290 }
1291
1292 apply(){
1293     file=$1
1294     shift
1295     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1296 }
1297
1298 cp_if_changed(){
1299     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1300     mkdir -p "$(dirname $2)"
1301     $cp_f "$1" "$2"
1302 }
1303
1304 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1305 # system-dependent things.
1306
1307 COMPONENT_LIST="
1308     bsfs
1309     decoders
1310     demuxers
1311     encoders
1312     filters
1313     hwaccels
1314     indevs
1315     muxers
1316     outdevs
1317     parsers
1318     protocols
1319 "
1320
1321 EXAMPLE_LIST="
1322     avio_reading_example
1323     decoding_encoding_example
1324     demuxing_decoding_example
1325     extract_mvs_example
1326     filter_audio_example
1327     filtering_audio_example
1328     filtering_video_example
1329     metadata_example
1330     muxing_example
1331     qsvdec_example
1332     remuxing_example
1333     resampling_audio_example
1334     scaling_video_example
1335     transcode_aac_example
1336     transcoding_example
1337 "
1338
1339 EXTERNAL_LIBRARY_LIST="
1340     avisynth
1341     bzlib
1342     crystalhd
1343     decklink
1344     frei0r
1345     gnutls
1346     iconv
1347     ladspa
1348     libaacplus
1349     libass
1350     libbluray
1351     libbs2b
1352     libcaca
1353     libcdio
1354     libcelt
1355     libdc1394
1356     libfaac
1357     libfdk_aac
1358     libflite
1359     libfontconfig
1360     libfreetype
1361     libfribidi
1362     libgme
1363     libgsm
1364     libiec61883
1365     libilbc
1366     libmfx
1367     libmodplug
1368     libmp3lame
1369     libnut
1370     libopencore_amrnb
1371     libopencore_amrwb
1372     libopencv
1373     libopenh264
1374     libopenjpeg
1375     libopus
1376     libpulse
1377     libquvi
1378     librtmp
1379     libschroedinger
1380     libshine
1381     libsmbclient
1382     libsoxr
1383     libspeex
1384     libssh
1385     libstagefright_h264
1386     libtheora
1387     libtwolame
1388     libutvideo
1389     libv4l2
1390     libvidstab
1391     libvo_aacenc
1392     libvo_amrwbenc
1393     libvorbis
1394     libvpx
1395     libwavpack
1396     libwebp
1397     libx264
1398     libx265
1399     libxavs
1400     libxcb
1401     libxcb_shm
1402     libxcb_shape
1403     libxcb_xfixes
1404     libxvid
1405     libzmq
1406     libzvbi
1407     lzma
1408     nvenc
1409     openal
1410     opencl
1411     opengl
1412     openssl
1413     sdl
1414     x11grab
1415     xlib
1416     zlib
1417 "
1418
1419 DOCUMENT_LIST="
1420     doc
1421     htmlpages
1422     manpages
1423     podpages
1424     txtpages
1425 "
1426
1427 FEATURE_LIST="
1428     ftrapv
1429     gray
1430     hardcoded_tables
1431     runtime_cpudetect
1432     safe_bitstream_reader
1433     shared
1434     small
1435     static
1436     swscale_alpha
1437 "
1438
1439 HWACCEL_LIST="
1440     dxva2
1441     vaapi
1442     vda
1443     vdpau
1444     xvmc
1445 "
1446
1447 LIBRARY_LIST="
1448     avcodec
1449     avdevice
1450     avfilter
1451     avformat
1452     avresample
1453     avutil
1454     postproc
1455     swresample
1456     swscale
1457 "
1458
1459 LICENSE_LIST="
1460     gpl
1461     nonfree
1462     version3
1463 "
1464
1465 PROGRAM_LIST="
1466     ffplay
1467     ffprobe
1468     ffserver
1469     ffmpeg
1470 "
1471
1472 SUBSYSTEM_LIST="
1473     dct
1474     dwt
1475     error_resilience
1476     faan
1477     fast_unaligned
1478     fft
1479     lsp
1480     lzo
1481     mdct
1482     pixelutils
1483     network
1484     qsv
1485     rdft
1486 "
1487
1488 CONFIG_LIST="
1489     $COMPONENT_LIST
1490     $DOCUMENT_LIST
1491     $EXAMPLE_LIST
1492     $EXTERNAL_LIBRARY_LIST
1493     $FEATURE_LIST
1494     $HWACCEL_LIST
1495     $LICENSE_LIST
1496     $LIBRARY_LIST
1497     $PROGRAM_LIST
1498     $SUBSYSTEM_LIST
1499     fontconfig
1500     incompatible_libav_abi
1501     memalign_hack
1502     memory_poisoning
1503     neon_clobber_test
1504     pic
1505     pod2man
1506     raise_major
1507     thumb
1508     xmm_clobber_test
1509 "
1510
1511 THREADS_LIST="
1512     pthreads
1513     os2threads
1514     w32threads
1515 "
1516
1517 ATOMICS_LIST="
1518     atomics_gcc
1519     atomics_suncc
1520     atomics_win32
1521 "
1522
1523 ARCH_LIST="
1524     aarch64
1525     alpha
1526     arm
1527     avr32
1528     avr32_ap
1529     avr32_uc
1530     bfin
1531     ia64
1532     m68k
1533     mips
1534     mips64
1535     parisc
1536     ppc
1537     ppc64
1538     s390
1539     sh4
1540     sparc
1541     sparc64
1542     tilegx
1543     tilepro
1544     tomi
1545     x86
1546     x86_32
1547     x86_64
1548 "
1549
1550 ARCH_EXT_LIST_ARM="
1551     armv5te
1552     armv6
1553     armv6t2
1554     armv8
1555     neon
1556     vfp
1557     vfpv3
1558     setend
1559 "
1560
1561 ARCH_EXT_LIST_MIPS="
1562     mipsfpu
1563     mips32r2
1564     mipsdspr1
1565     mipsdspr2
1566 "
1567
1568 ARCH_EXT_LIST_X86_SIMD="
1569     amd3dnow
1570     amd3dnowext
1571     avx
1572     avx2
1573     fma3
1574     fma4
1575     mmx
1576     mmxext
1577     sse
1578     sse2
1579     sse3
1580     sse4
1581     sse42
1582     ssse3
1583     xop
1584 "
1585
1586 ARCH_EXT_LIST_PPC="
1587     altivec
1588     dcbzl
1589     ldbrx
1590     ppc4xx
1591     vsx
1592 "
1593
1594 ARCH_EXT_LIST_X86="
1595     $ARCH_EXT_LIST_X86_SIMD
1596     cpunop
1597     i686
1598 "
1599
1600 ARCH_EXT_LIST="
1601     $ARCH_EXT_LIST_ARM
1602     $ARCH_EXT_LIST_PPC
1603     $ARCH_EXT_LIST_X86
1604     $ARCH_EXT_LIST_MIPS
1605     loongson
1606 "
1607
1608 ARCH_FEATURES="
1609     aligned_stack
1610     fast_64bit
1611     fast_clz
1612     fast_cmov
1613     local_aligned_8
1614     local_aligned_16
1615     local_aligned_32
1616     simd_align_16
1617 "
1618
1619 BUILTIN_LIST="
1620     atomic_cas_ptr
1621     atomic_compare_exchange
1622     machine_rw_barrier
1623     MemoryBarrier
1624     mm_empty
1625     rdtsc
1626     sarestart
1627     sync_val_compare_and_swap
1628 "
1629 HAVE_LIST_CMDLINE="
1630     inline_asm
1631     symver
1632     yasm
1633 "
1634
1635 HAVE_LIST_PUB="
1636     bigendian
1637     fast_unaligned
1638     incompatible_libav_abi
1639 "
1640
1641 HEADERS_LIST="
1642     alsa_asoundlib_h
1643     altivec_h
1644     arpa_inet_h
1645     asm_types_h
1646     cdio_paranoia_h
1647     cdio_paranoia_paranoia_h
1648     dev_bktr_ioctl_bt848_h
1649     dev_bktr_ioctl_meteor_h
1650     dev_ic_bt8xx_h
1651     dev_video_bktr_ioctl_bt848_h
1652     dev_video_meteor_ioctl_meteor_h
1653     direct_h
1654     dlfcn_h
1655     dxva_h
1656     ES2_gl_h
1657     gsm_h
1658     io_h
1659     mach_mach_time_h
1660     machine_ioctl_bt848_h
1661     machine_ioctl_meteor_h
1662     malloc_h
1663     openjpeg_1_5_openjpeg_h
1664     OpenGL_gl3_h
1665     poll_h
1666     sndio_h
1667     soundcard_h
1668     sys_mman_h
1669     sys_param_h
1670     sys_resource_h
1671     sys_select_h
1672     sys_soundcard_h
1673     sys_time_h
1674     sys_un_h
1675     sys_videoio_h
1676     termios_h
1677     udplite_h
1678     unistd_h
1679     windows_h
1680     winsock2_h
1681 "
1682
1683 INTRINSICS_LIST="
1684     intrinsics_neon
1685 "
1686
1687 MATH_FUNCS="
1688     atanf
1689     atan2f
1690     cbrt
1691     cbrtf
1692     cosf
1693     exp2
1694     exp2f
1695     expf
1696     isinf
1697     isnan
1698     ldexpf
1699     llrint
1700     llrintf
1701     log2
1702     log2f
1703     log10f
1704     lrint
1705     lrintf
1706     powf
1707     rint
1708     round
1709     roundf
1710     sinf
1711     trunc
1712     truncf
1713 "
1714
1715 SYSTEM_FUNCS="
1716     access
1717     aligned_malloc
1718     clock_gettime
1719     closesocket
1720     CommandLineToArgvW
1721     CoTaskMemFree
1722     CryptGenRandom
1723     dlopen
1724     fcntl
1725     flt_lim
1726     fork
1727     getaddrinfo
1728     gethrtime
1729     getopt
1730     GetProcessAffinityMask
1731     GetProcessMemoryInfo
1732     GetProcessTimes
1733     getrusage
1734     getservbyport
1735     GetSystemTimeAsFileTime
1736     gettimeofday
1737     glob
1738     glXGetProcAddress
1739     gmtime_r
1740     inet_aton
1741     isatty
1742     jack_port_get_latency_range
1743     kbhit
1744     localtime_r
1745     lzo1x_999_compress
1746     mach_absolute_time
1747     MapViewOfFile
1748     memalign
1749     mkstemp
1750     mmap
1751     mprotect
1752     nanosleep
1753     PeekNamedPipe
1754     posix_memalign
1755     pthread_cancel
1756     sched_getaffinity
1757     SetConsoleTextAttribute
1758     setmode
1759     setrlimit
1760     Sleep
1761     strerror_r
1762     sysconf
1763     sysctl
1764     usleep
1765     VirtualAlloc
1766     wglGetProcAddress
1767 "
1768
1769 TOOLCHAIN_FEATURES="
1770     as_dn_directive
1771     as_func
1772     asm_mod_q
1773     attribute_may_alias
1774     attribute_packed
1775     ebp_available
1776     ebx_available
1777     gnu_as
1778     gnu_windres
1779     ibm_asm
1780     inline_asm_labels
1781     inline_asm_nonlocal_labels
1782     inline_asm_direct_symbol_refs
1783     pragma_deprecated
1784     rsync_contimeout
1785     symver_asm_label
1786     symver_gnu_asm
1787     vfp_args
1788     xform_asm
1789     xmm_clobbers
1790 "
1791
1792 TYPES_LIST="
1793     CONDITION_VARIABLE_Ptr
1794     DXVA_PicParams_HEVC
1795     socklen_t
1796     struct_addrinfo
1797     struct_group_source_req
1798     struct_ip_mreq_source
1799     struct_ipv6_mreq
1800     struct_pollfd
1801     struct_rusage_ru_maxrss
1802     struct_sctp_event_subscribe
1803     struct_sockaddr_in6
1804     struct_sockaddr_sa_len
1805     struct_sockaddr_storage
1806     struct_stat_st_mtim_tv_nsec
1807     struct_v4l2_frmivalenum_discrete
1808 "
1809
1810 HAVE_LIST="
1811     $ARCH_EXT_LIST
1812     $(add_suffix _external $ARCH_EXT_LIST)
1813     $(add_suffix _inline   $ARCH_EXT_LIST)
1814     $ARCH_FEATURES
1815     $ATOMICS_LIST
1816     $BUILTIN_LIST
1817     $HAVE_LIST_CMDLINE
1818     $HAVE_LIST_PUB
1819     $HEADERS_LIST
1820     $INTRINSICS_LIST
1821     $MATH_FUNCS
1822     $SYSTEM_FUNCS
1823     $THREADS_LIST
1824     $TOOLCHAIN_FEATURES
1825     $TYPES_LIST
1826     atomics_native
1827     dos_paths
1828     dxva2api_cobj
1829     dxva2_lib
1830     libc_msvcrt
1831     libdc1394_1
1832     libdc1394_2
1833     makeinfo
1834     makeinfo_html
1835     perl
1836     pod2man
1837     sdl
1838     section_data_rel_ro
1839     texi2html
1840     threads
1841     vaapi_x11
1842     vdpau_x11
1843     xlib
1844 "
1845
1846 # options emitted with CONFIG_ prefix but not available on the command line
1847 CONFIG_EXTRA="
1848     aandcttables
1849     ac3dsp
1850     audio_frame_queue
1851     audiodsp
1852     blockdsp
1853     bswapdsp
1854     cabac
1855     dvprofile
1856     exif
1857     faandct
1858     faanidct
1859     fdctdsp
1860     fmtconvert
1861     frame_thread_encoder
1862     gcrypt
1863     golomb
1864     gplv3
1865     h263dsp
1866     h264chroma
1867     h264dsp
1868     h264pred
1869     h264qpel
1870     hpeldsp
1871     huffman
1872     huffyuvdsp
1873     huffyuvencdsp
1874     idctdsp
1875     iirfilter
1876     imdct15
1877     intrax8
1878     lgplv3
1879     llauddsp
1880     llviddsp
1881     lpc
1882     me_cmp
1883     mpeg_er
1884     mpegaudio
1885     mpegaudiodsp
1886     mpegvideo
1887     mpegvideoenc
1888     nettle
1889     pixblockdsp
1890     qpeldsp
1891     rangecoder
1892     riffdec
1893     riffenc
1894     rtpdec
1895     rtpenc_chain
1896     sinewin
1897     startcode
1898     tpeldsp
1899     videodsp
1900     vp3dsp
1901     wma_freqs
1902 "
1903
1904 CMDLINE_SELECT="
1905     $ARCH_EXT_LIST
1906     $CONFIG_LIST
1907     $HAVE_LIST_CMDLINE
1908     $THREADS_LIST
1909     asm
1910     cross_compile
1911     debug
1912     extra_warnings
1913     logging
1914     lto
1915     optimizations
1916     rpath
1917     stripping
1918 "
1919
1920 PATHS_LIST="
1921     bindir
1922     datadir
1923     docdir
1924     incdir
1925     libdir
1926     mandir
1927     prefix
1928     shlibdir
1929 "
1930
1931 CMDLINE_SET="
1932     $PATHS_LIST
1933     ar
1934     arch
1935     as
1936     assert_level
1937     build_suffix
1938     cc
1939     cpu
1940     cross_prefix
1941     cxx
1942     dep_cc
1943     doxygen
1944     extra_version
1945     gas
1946     host_cc
1947     host_cflags
1948     host_ld
1949     host_ldflags
1950     host_libs
1951     host_os
1952     install
1953     ld
1954     logfile
1955     malloc_prefix
1956     nm
1957     optflags
1958     pkg_config
1959     pkg_config_flags
1960     progs_suffix
1961     random_seed
1962     ranlib
1963     samples
1964     strip
1965     sws_max_filter_size
1966     sysinclude
1967     sysroot
1968     target_exec
1969     target_os
1970     target_path
1971     target_samples
1972     tempprefix
1973     toolchain
1974     valgrind
1975     yasmexe
1976 "
1977
1978 CMDLINE_APPEND="
1979     extra_cflags
1980     extra_cxxflags
1981     host_cppflags
1982 "
1983
1984 # code dependency declarations
1985
1986 # architecture extensions
1987
1988 armv5te_deps="arm"
1989 armv6_deps="arm"
1990 armv6t2_deps="arm"
1991 armv8_deps="aarch64"
1992 neon_deps_any="aarch64 arm"
1993 intrinsics_neon_deps="neon"
1994 vfp_deps_any="aarch64 arm"
1995 vfpv3_deps="vfp"
1996 setend_deps="arm"
1997
1998 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1999
2000 mipsfpu_deps="mips"
2001 mipsdspr1_deps="mips"
2002 mipsdspr2_deps="mips"
2003
2004 altivec_deps="ppc"
2005 ppc4xx_deps="ppc"
2006 vsx_deps="ppc"
2007
2008 cpunop_deps="i686"
2009 x86_64_select="i686"
2010 x86_64_suggest="fast_cmov"
2011
2012 amd3dnow_deps="mmx"
2013 amd3dnowext_deps="amd3dnow"
2014 i686_deps="x86"
2015 mmx_deps="x86"
2016 mmxext_deps="mmx"
2017 sse_deps="mmxext"
2018 sse2_deps="sse"
2019 sse3_deps="sse2"
2020 ssse3_deps="sse3"
2021 sse4_deps="ssse3"
2022 sse42_deps="sse4"
2023 avx_deps="sse42"
2024 xop_deps="avx"
2025 fma3_deps="avx"
2026 fma4_deps="avx"
2027 avx2_deps="avx"
2028
2029 mmx_external_deps="yasm"
2030 mmx_inline_deps="inline_asm"
2031 mmx_suggest="mmx_external mmx_inline"
2032
2033 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2034     eval dep=\$${ext}_deps
2035     eval ${ext}_external_deps='"${dep}_external"'
2036     eval ${ext}_inline_deps='"${dep}_inline"'
2037     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2038 done
2039
2040 aligned_stack_if_any="aarch64 ppc x86"
2041 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2042 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2043 fast_unaligned_if_any="aarch64 ppc x86"
2044 simd_align_16_if_any="altivec neon sse"
2045
2046 # system capabilities
2047
2048 symver_if_any="symver_asm_label symver_gnu_asm"
2049
2050 # threading support
2051 atomics_gcc_if_any="sync_val_compare_and_swap atomic_compare_exchange"
2052 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2053 atomics_win32_if="MemoryBarrier"
2054 atomics_native_if_any="$ATOMICS_LIST"
2055 w32threads_deps="atomics_native"
2056 threads_if_any="$THREADS_LIST"
2057
2058 # subsystems
2059 dct_select="rdft"
2060 error_resilience_select="me_cmp"
2061 faandct_deps="faan fdctdsp"
2062 faanidct_deps="faan idctdsp"
2063 frame_thread_encoder_deps="encoders threads"
2064 intrax8_select="error_resilience"
2065 mdct_select="fft"
2066 rdft_select="fft"
2067 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2068 mpeg_er_select="error_resilience"
2069 mpegaudio_select="mpegaudiodsp"
2070 mpegaudiodsp_select="dct"
2071 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp videodsp"
2072 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2073
2074 # decoders / encoders
2075 aac_decoder_select="imdct15 mdct sinewin"
2076 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
2077 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2078 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2079 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2080 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2081 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2082 aic_decoder_select="golomb idctdsp"
2083 alac_encoder_select="lpc"
2084 als_decoder_select="bswapdsp"
2085 amrnb_decoder_select="lsp"
2086 amrwb_decoder_select="lsp"
2087 amv_decoder_select="sp5x_decoder exif"
2088 amv_encoder_select="aandcttables mpegvideoenc"
2089 ape_decoder_select="bswapdsp llauddsp"
2090 apng_decoder_select="zlib"
2091 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2092 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2093 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2094 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2095 atrac1_decoder_select="mdct sinewin"
2096 atrac3_decoder_select="mdct"
2097 atrac3p_decoder_select="mdct sinewin"
2098 avrn_decoder_select="exif"
2099 bink_decoder_select="blockdsp hpeldsp"
2100 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2101 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2102 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2103 cllc_decoder_select="bswapdsp"
2104 comfortnoise_encoder_select="lpc"
2105 cook_decoder_select="audiodsp mdct sinewin"
2106 cscd_decoder_select="lzo"
2107 cscd_decoder_suggest="zlib"
2108 dca_decoder_select="fmtconvert mdct"
2109 dirac_decoder_select="dwt golomb videodsp mpegvideoenc"
2110 dnxhd_decoder_select="blockdsp idctdsp"
2111 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2112 dvvideo_decoder_select="dvprofile idctdsp"
2113 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2114 dxa_decoder_select="zlib"
2115 eac3_decoder_select="ac3_decoder"
2116 eac3_encoder_select="ac3_encoder"
2117 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2118 eatgq_decoder_select="aandcttables"
2119 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
2120 exr_decoder_select="zlib"
2121 ffv1_decoder_select="golomb rangecoder"
2122 ffv1_encoder_select="rangecoder"
2123 ffvhuff_decoder_select="huffyuv_decoder"
2124 ffvhuff_encoder_select="huffyuv_encoder"
2125 fic_decoder_select="golomb"
2126 flac_decoder_select="golomb"
2127 flac_encoder_select="bswapdsp golomb lpc"
2128 flashsv_decoder_select="zlib"
2129 flashsv_encoder_select="zlib"
2130 flashsv2_encoder_select="zlib"
2131 flashsv2_decoder_select="zlib"
2132 flv_decoder_select="h263_decoder"
2133 flv_encoder_select="h263_encoder"
2134 fourxm_decoder_select="blockdsp bswapdsp"
2135 fraps_decoder_select="bswapdsp huffman"
2136 g2m_decoder_select="blockdsp idctdsp zlib"
2137 g729_decoder_select="audiodsp"
2138 h261_decoder_select="mpeg_er mpegvideo"
2139 h261_encoder_select="aandcttables mpegvideoenc"
2140 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2141 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2142 h263i_decoder_select="h263_decoder"
2143 h263p_encoder_select="h263_encoder"
2144 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
2145 h264_decoder_suggest="error_resilience"
2146 h264_qsv_decoder_deps="libmfx"
2147 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsv h264_qsv_hwaccel"
2148 hevc_decoder_select="bswapdsp cabac golomb videodsp"
2149 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2150 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llviddsp"
2151 iac_decoder_select="imc_decoder"
2152 imc_decoder_select="bswapdsp fft mdct sinewin"
2153 indeo3_decoder_select="hpeldsp"
2154 interplay_video_decoder_select="hpeldsp"
2155 jpegls_decoder_select="golomb mjpeg_decoder"
2156 jpegls_encoder_select="golomb"
2157 jv_decoder_select="blockdsp"
2158 lagarith_decoder_select="huffyuvdsp"
2159 ljpeg_encoder_select="aandcttables idctdsp"
2160 loco_decoder_select="golomb"
2161 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2162 metasound_decoder_select="lsp mdct sinewin"
2163 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2164 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp"
2165 mjpeg_encoder_select="aandcttables mpegvideoenc"
2166 mjpegb_decoder_select="mjpeg_decoder"
2167 mlp_decoder_select="mlp_parser"
2168 motionpixels_decoder_select="bswapdsp"
2169 mp1_decoder_select="mpegaudio"
2170 mp1float_decoder_select="mpegaudio"
2171 mp2_decoder_select="mpegaudio"
2172 mp2float_decoder_select="mpegaudio"
2173 mp3_decoder_select="mpegaudio"
2174 mp3adu_decoder_select="mpegaudio"
2175 mp3adufloat_decoder_select="mpegaudio"
2176 mp3float_decoder_select="mpegaudio"
2177 mp3on4_decoder_select="mpegaudio"
2178 mp3on4float_decoder_select="mpegaudio"
2179 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2180 mpc8_decoder_select="mpegaudiodsp"
2181 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2182 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2183 mpegvideo_decoder_select="error_resilience mpeg_er mpegvideo"
2184 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2185 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2186 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2187 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2188 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2189 mpeg4_encoder_select="h263_encoder"
2190 msmpeg4v1_decoder_select="h263_decoder"
2191 msmpeg4v2_decoder_select="h263_decoder"
2192 msmpeg4v2_encoder_select="h263_encoder"
2193 msmpeg4v3_decoder_select="h263_decoder"
2194 msmpeg4v3_encoder_select="h263_encoder"
2195 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2196 mxpeg_decoder_select="mjpeg_decoder"
2197 nellymoser_decoder_select="mdct sinewin"
2198 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2199 nuv_decoder_select="idctdsp lzo"
2200 on2avc_decoder_select="mdct"
2201 opus_decoder_deps="swresample"
2202 opus_decoder_select="imdct15"
2203 png_decoder_select="zlib"
2204 png_encoder_select="huffyuvencdsp zlib"
2205 prores_decoder_select="blockdsp idctdsp"
2206 prores_encoder_select="fdctdsp"
2207 qcelp_decoder_select="lsp"
2208 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2209 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2210 ra_144_decoder_select="audiodsp"
2211 ralf_decoder_select="golomb"
2212 rawvideo_decoder_select="bswapdsp"
2213 rtjpeg_decoder_select="me_cmp"
2214 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2215 rv10_encoder_select="h263_encoder"
2216 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2217 rv20_encoder_select="h263_encoder"
2218 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo videodsp"
2219 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo videodsp"
2220 shorten_decoder_select="golomb"
2221 sipr_decoder_select="lsp"
2222 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2223 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2224 sonic_decoder_select="golomb rangecoder"
2225 sonic_encoder_select="golomb rangecoder"
2226 sonic_ls_encoder_select="golomb rangecoder"
2227 sp5x_decoder_select="mjpeg_decoder"
2228 svq1_decoder_select="hpeldsp"
2229 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2230 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2231 svq3_decoder_suggest="zlib"
2232 tak_decoder_select="audiodsp"
2233 theora_decoder_select="vp3_decoder"
2234 thp_decoder_select="mjpeg_decoder"
2235 tiff_decoder_suggest="zlib lzma"
2236 tiff_encoder_suggest="zlib"
2237 truehd_decoder_select="mlp_parser"
2238 truemotion2_decoder_select="bswapdsp"
2239 truespeech_decoder_select="bswapdsp"
2240 tscc_decoder_select="zlib"
2241 twinvq_decoder_select="mdct lsp sinewin"
2242 utvideo_decoder_select="bswapdsp"
2243 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2244 vble_decoder_select="huffyuvdsp"
2245 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2246 vc1image_decoder_select="vc1_decoder"
2247 vorbis_decoder_select="mdct"
2248 vorbis_encoder_select="mdct"
2249 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2250 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
2251 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
2252 vp6a_decoder_select="vp6_decoder"
2253 vp6f_decoder_select="vp6_decoder"
2254 vp7_decoder_select="h264pred videodsp"
2255 vp8_decoder_select="h264pred videodsp"
2256 vp9_decoder_select="videodsp vp9_parser"
2257 webp_decoder_select="vp8_decoder"
2258 wmalossless_decoder_select="llauddsp"
2259 wmapro_decoder_select="mdct sinewin wma_freqs"
2260 wmav1_decoder_select="mdct sinewin wma_freqs"
2261 wmav1_encoder_select="mdct sinewin wma_freqs"
2262 wmav2_decoder_select="mdct sinewin wma_freqs"
2263 wmav2_encoder_select="mdct sinewin wma_freqs"
2264 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2265 wmv1_decoder_select="h263_decoder"
2266 wmv1_encoder_select="h263_encoder"
2267 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp"
2268 wmv2_encoder_select="h263_encoder"
2269 wmv3_decoder_select="vc1_decoder"
2270 wmv3image_decoder_select="wmv3_decoder"
2271 zerocodec_decoder_select="zlib"
2272 zlib_decoder_select="zlib"
2273 zlib_encoder_select="zlib"
2274 zmbv_decoder_select="zlib"
2275 zmbv_encoder_select="zlib"
2276
2277 # hardware accelerators
2278 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2279 dxva2_deps="dxva2api_h"
2280 vaapi_deps="va_va_h"
2281 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2282 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2283 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2284 xvmc_deps="X11_extensions_XvMClib_h"
2285
2286 h263_vaapi_hwaccel_deps="vaapi"
2287 h263_vaapi_hwaccel_select="h263_decoder"
2288 h263_vdpau_hwaccel_deps="vdpau"
2289 h263_vdpau_hwaccel_select="h263_decoder"
2290 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2291 h264_dxva2_hwaccel_deps="dxva2"
2292 h264_dxva2_hwaccel_select="h264_decoder"
2293 h264_qsv_hwaccel_deps="libmfx"
2294 h264_vaapi_hwaccel_deps="vaapi"
2295 h264_vaapi_hwaccel_select="h264_decoder"
2296 h264_vda_decoder_deps="vda"
2297 h264_vda_decoder_select="h264_decoder"
2298 h264_vda_hwaccel_deps="vda"
2299 h264_vda_hwaccel_select="h264_decoder"
2300 h264_vda_old_hwaccel_deps="vda"
2301 h264_vda_old_hwaccel_select="h264_decoder"
2302 h264_vdpau_decoder_deps="vdpau"
2303 h264_vdpau_decoder_select="h264_decoder"
2304 h264_vdpau_hwaccel_deps="vdpau"
2305 h264_vdpau_hwaccel_select="h264_decoder"
2306 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2307 hevc_dxva2_hwaccel_select="hevc_decoder"
2308 mpeg_vdpau_decoder_deps="vdpau"
2309 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2310 mpeg_xvmc_hwaccel_deps="xvmc"
2311 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2312 mpeg1_vdpau_decoder_deps="vdpau"
2313 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2314 mpeg1_vdpau_hwaccel_deps="vdpau"
2315 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2316 mpeg1_xvmc_hwaccel_deps="xvmc"
2317 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2318 mpeg2_crystalhd_decoder_select="crystalhd"
2319 mpeg2_dxva2_hwaccel_deps="dxva2"
2320 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2321 mpeg2_vaapi_hwaccel_deps="vaapi"
2322 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2323 mpeg2_vdpau_hwaccel_deps="vdpau"
2324 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2325 mpeg2_xvmc_hwaccel_deps="xvmc"
2326 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2327 mpeg4_crystalhd_decoder_select="crystalhd"
2328 mpeg4_vaapi_hwaccel_deps="vaapi"
2329 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2330 mpeg4_vdpau_decoder_deps="vdpau"
2331 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2332 mpeg4_vdpau_hwaccel_deps="vdpau"
2333 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2334 msmpeg4_crystalhd_decoder_select="crystalhd"
2335 vc1_crystalhd_decoder_select="crystalhd"
2336 vc1_dxva2_hwaccel_deps="dxva2"
2337 vc1_dxva2_hwaccel_select="vc1_decoder"
2338 vc1_vaapi_hwaccel_deps="vaapi"
2339 vc1_vaapi_hwaccel_select="vc1_decoder"
2340 vc1_vdpau_decoder_deps="vdpau"
2341 vc1_vdpau_decoder_select="vc1_decoder"
2342 vc1_vdpau_hwaccel_deps="vdpau"
2343 vc1_vdpau_hwaccel_select="vc1_decoder"
2344 wmv3_crystalhd_decoder_select="crystalhd"
2345 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2346 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2347 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2348 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2349
2350 # parsers
2351 h264_parser_select="h264_decoder"
2352 hevc_parser_select="hevc_decoder"
2353 mpegvideo_parser_select="mpegvideo"
2354 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2355 vc1_parser_select="mpegvideo startcode vc1_decoder"
2356
2357 # external libraries
2358 libaacplus_encoder_deps="libaacplus"
2359 libcelt_decoder_deps="libcelt"
2360 libfaac_encoder_deps="libfaac"
2361 libfaac_encoder_select="audio_frame_queue"
2362 libfdk_aac_decoder_deps="libfdk_aac"
2363 libfdk_aac_encoder_deps="libfdk_aac"
2364 libfdk_aac_encoder_select="audio_frame_queue"
2365 libgme_demuxer_deps="libgme"
2366 libgsm_decoder_deps="libgsm"
2367 libgsm_encoder_deps="libgsm"
2368 libgsm_ms_decoder_deps="libgsm"
2369 libgsm_ms_encoder_deps="libgsm"
2370 libilbc_decoder_deps="libilbc"
2371 libilbc_encoder_deps="libilbc"
2372 libmodplug_demuxer_deps="libmodplug"
2373 libmp3lame_encoder_deps="libmp3lame"
2374 libmp3lame_encoder_select="audio_frame_queue"
2375 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2376 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2377 libopencore_amrnb_encoder_select="audio_frame_queue"
2378 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2379 libopenh264_encoder_deps="libopenh264"
2380 libopenjpeg_decoder_deps="libopenjpeg"
2381 libopenjpeg_encoder_deps="libopenjpeg"
2382 libopus_decoder_deps="libopus"
2383 libopus_encoder_deps="libopus"
2384 libopus_encoder_select="audio_frame_queue"
2385 libquvi_demuxer_deps="libquvi"
2386 libschroedinger_decoder_deps="libschroedinger"
2387 libschroedinger_encoder_deps="libschroedinger"
2388 libshine_encoder_deps="libshine"
2389 libshine_encoder_select="audio_frame_queue"
2390 libspeex_decoder_deps="libspeex"
2391 libspeex_encoder_deps="libspeex"
2392 libspeex_encoder_select="audio_frame_queue"
2393 libstagefright_h264_decoder_deps="libstagefright_h264"
2394 libtheora_encoder_deps="libtheora"
2395 libtwolame_encoder_deps="libtwolame"
2396 libvo_aacenc_encoder_deps="libvo_aacenc"
2397 libvo_aacenc_encoder_select="audio_frame_queue"
2398 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2399 libvorbis_decoder_deps="libvorbis"
2400 libvorbis_encoder_deps="libvorbis"
2401 libvorbis_encoder_select="audio_frame_queue"
2402 libvpx_vp8_decoder_deps="libvpx"
2403 libvpx_vp8_encoder_deps="libvpx"
2404 libvpx_vp9_decoder_deps="libvpx"
2405 libvpx_vp9_encoder_deps="libvpx"
2406 libwavpack_encoder_deps="libwavpack"
2407 libwebp_encoder_deps="libwebp"
2408 libx264_encoder_deps="libx264"
2409 libx264rgb_encoder_deps="libx264"
2410 libx264rgb_encoder_select="libx264_encoder"
2411 libx265_encoder_deps="libx265"
2412 libxavs_encoder_deps="libxavs"
2413 libxvid_encoder_deps="libxvid"
2414 libutvideo_decoder_deps="libutvideo"
2415 libutvideo_encoder_deps="libutvideo"
2416 libzvbi_teletext_decoder_deps="libzvbi"
2417 nvenc_encoder_deps="nvenc"
2418
2419 # demuxers / muxers
2420 ac3_demuxer_select="ac3_parser"
2421 asf_demuxer_select="riffdec"
2422 asf_muxer_select="riffenc"
2423 asf_stream_muxer_select="asf_muxer"
2424 avi_demuxer_select="riffdec exif"
2425 avi_muxer_select="riffenc"
2426 avisynth_demuxer_deps="avisynth"
2427 avisynth_demuxer_select="riffdec"
2428 caf_demuxer_select="riffdec"
2429 dash_muxer_select="mp4_muxer"
2430 dirac_demuxer_select="dirac_parser"
2431 dts_demuxer_select="dca_parser"
2432 dtshd_demuxer_select="dca_parser"
2433 dv_demuxer_select="dvprofile"
2434 dv_muxer_select="dvprofile"
2435 dxa_demuxer_select="riffdec"
2436 eac3_demuxer_select="ac3_parser"
2437 f4v_muxer_select="mov_muxer"
2438 flac_demuxer_select="flac_parser"
2439 hds_muxer_select="flv_muxer"
2440 hls_muxer_select="mpegts_muxer"
2441 image2_alias_pix_demuxer_select="image2_demuxer"
2442 image2_brender_pix_demuxer_select="image2_demuxer"
2443 ipod_muxer_select="mov_muxer"
2444 ismv_muxer_select="mov_muxer"
2445 libnut_demuxer_deps="libnut"
2446 libnut_muxer_deps="libnut"
2447 matroska_audio_muxer_select="matroska_muxer"
2448 matroska_demuxer_select="riffdec"
2449 matroska_demuxer_suggest="bzlib lzo zlib"
2450 matroska_muxer_select="riffenc"
2451 mmf_muxer_select="riffenc"
2452 mov_demuxer_select="riffdec"
2453 mov_demuxer_suggest="zlib"
2454 mov_muxer_select="riffenc rtpenc_chain"
2455 mp3_demuxer_select="mpegaudio_parser"
2456 mp4_muxer_select="mov_muxer"
2457 mpegts_muxer_select="adts_muxer latm_muxer"
2458 mpegtsraw_demuxer_select="mpegts_demuxer"
2459 mxf_d10_muxer_select="mxf_muxer"
2460 mxf_opatom_muxer_select="mxf_muxer"
2461 nut_muxer_select="riffenc"
2462 nuv_demuxer_select="riffdec"
2463 oga_muxer_select="ogg_muxer"
2464 ogg_demuxer_select="golomb"
2465 opus_muxer_select="ogg_muxer"
2466 psp_muxer_select="mov_muxer"
2467 rtp_demuxer_select="sdp_demuxer"
2468 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2469 rtsp_demuxer_select="http_protocol rtpdec"
2470 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2471 sap_demuxer_select="sdp_demuxer"
2472 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2473 sdp_demuxer_select="rtpdec"
2474 smoothstreaming_muxer_select="ismv_muxer"
2475 spdif_muxer_select="aac_parser"
2476 spx_muxer_select="ogg_muxer"
2477 tak_demuxer_select="tak_parser"
2478 tg2_muxer_select="mov_muxer"
2479 tgp_muxer_select="mov_muxer"
2480 vobsub_demuxer_select="mpegps_demuxer"
2481 w64_demuxer_select="wav_demuxer"
2482 w64_muxer_select="wav_muxer"
2483 wav_demuxer_select="riffdec"
2484 wav_muxer_select="riffenc"
2485 webm_muxer_select="riffenc"
2486 wtv_demuxer_select="riffdec"
2487 wtv_muxer_select="riffenc"
2488 xmv_demuxer_select="riffdec"
2489 xwma_demuxer_select="riffdec"
2490
2491 # indevs / outdevs
2492 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2493 alsa_outdev_deps="alsa_asoundlib_h"
2494 avfoundation_indev_extralibs="-framework CoreVideo -framework Foundation -framework AVFoundation -framework CoreMedia"
2495 avfoundation_indev_select="avfoundation"
2496 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2497 caca_outdev_deps="libcaca"
2498 decklink_outdev_deps="decklink pthreads"
2499 decklink_outdev_extralibs="-lstdc++"
2500 decklink_indev_deps="decklink pthreads"
2501 decklink_indev_extralibs="-lstdc++"
2502 dshow_indev_deps="IBaseFilter"
2503 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32"
2504 dv1394_indev_deps="dv1394"
2505 dv1394_indev_select="dv_demuxer"
2506 fbdev_indev_deps="linux_fb_h"
2507 fbdev_outdev_deps="linux_fb_h"
2508 gdigrab_indev_deps="CreateDIBSection"
2509 gdigrab_indev_extralibs="-lgdi32"
2510 gdigrab_indev_select="bmp_decoder"
2511 iec61883_indev_deps="libiec61883"
2512 jack_indev_deps="jack_jack_h sem_timedwait"
2513 lavfi_indev_deps="avfilter"
2514 libcdio_indev_deps="libcdio"
2515 libdc1394_indev_deps="libdc1394"
2516 libv4l2_indev_deps="libv4l2"
2517 openal_indev_deps="openal"
2518 opengl_outdev_deps="opengl"
2519 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2520 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2521 pulse_indev_deps="libpulse"
2522 pulse_outdev_deps="libpulse"
2523 qtkit_indev_extralibs="-framework QTKit -framework Foundation -framework QuartzCore"
2524 qtkit_indev_select="qtkit"
2525 sdl_outdev_deps="sdl"
2526 sndio_indev_deps="sndio_h"
2527 sndio_outdev_deps="sndio_h"
2528 v4l_indev_deps="linux_videodev_h"
2529 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2530 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2531 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2532 vfwcap_indev_extralibs="-lavicap32"
2533 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2534 xv_outdev_extralibs="-lXv -lX11 -lXext"
2535 x11grab_indev_deps="x11grab"
2536 x11grab_xcb_indev_deps="libxcb"
2537
2538 # protocols
2539 bluray_protocol_deps="libbluray"
2540 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2541 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2542 ffrtmpcrypt_protocol_select="tcp_protocol"
2543 ffrtmphttp_protocol_deps="!librtmp_protocol"
2544 ffrtmphttp_protocol_select="http_protocol"
2545 ftp_protocol_select="tcp_protocol"
2546 gopher_protocol_select="network"
2547 http_protocol_select="tcp_protocol"
2548 httpproxy_protocol_select="tcp_protocol"
2549 https_protocol_select="tls_protocol"
2550 icecast_protocol_select="http_protocol"
2551 librtmp_protocol_deps="librtmp"
2552 librtmpe_protocol_deps="librtmp"
2553 librtmps_protocol_deps="librtmp"
2554 librtmpt_protocol_deps="librtmp"
2555 librtmpte_protocol_deps="librtmp"
2556 libsmbclient_protocol_deps="libsmbclient gplv3"
2557 libssh_protocol_deps="libssh"
2558 mmsh_protocol_select="http_protocol"
2559 mmst_protocol_select="network"
2560 rtmp_protocol_deps="!librtmp_protocol"
2561 rtmp_protocol_select="tcp_protocol"
2562 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2563 rtmps_protocol_deps="!librtmp_protocol"
2564 rtmps_protocol_select="tls_protocol"
2565 rtmpt_protocol_select="ffrtmphttp_protocol"
2566 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2567 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2568 rtp_protocol_select="udp_protocol"
2569 sctp_protocol_deps="struct_sctp_event_subscribe"
2570 sctp_protocol_select="network"
2571 srtp_protocol_select="rtp_protocol"
2572 tcp_protocol_select="network"
2573 tls_protocol_deps_any="openssl gnutls"
2574 tls_protocol_select="tcp_protocol"
2575 udp_protocol_select="network"
2576 udplite_protocol_select="network"
2577 unix_protocol_deps="sys_un_h"
2578 unix_protocol_select="network"
2579
2580 # filters
2581 amovie_filter_deps="avcodec avformat"
2582 aresample_filter_deps="swresample"
2583 ass_filter_deps="libass"
2584 asyncts_filter_deps="avresample"
2585 atempo_filter_deps="avcodec"
2586 atempo_filter_select="rdft"
2587 azmq_filter_deps="libzmq"
2588 blackframe_filter_deps="gpl"
2589 boxblur_filter_deps="gpl"
2590 bs2b_filter_deps="libbs2b"
2591 colormatrix_filter_deps="gpl"
2592 cropdetect_filter_deps="gpl"
2593 delogo_filter_deps="gpl"
2594 deshake_filter_select="pixelutils"
2595 drawtext_filter_deps="libfreetype"
2596 ebur128_filter_deps="gpl"
2597 eq_filter_deps="gpl"
2598 flite_filter_deps="libflite"
2599 frei0r_filter_deps="frei0r dlopen"
2600 frei0r_src_filter_deps="frei0r dlopen"
2601 fspp_filter_deps="gpl"
2602 geq_filter_deps="gpl"
2603 histeq_filter_deps="gpl"
2604 hqdn3d_filter_deps="gpl"
2605 interlace_filter_deps="gpl"
2606 kerndeint_filter_deps="gpl"
2607 ladspa_filter_deps="ladspa dlopen"
2608 mcdeint_filter_deps="avcodec gpl"
2609 movie_filter_deps="avcodec avformat"
2610 mpdecimate_filter_deps="gpl"
2611 mpdecimate_filter_select="pixelutils"
2612 mptestsrc_filter_deps="gpl"
2613 negate_filter_deps="lut_filter"
2614 perspective_filter_deps="gpl"
2615 pp7_filter_deps="gpl"
2616 ocv_filter_deps="libopencv"
2617 owdenoise_filter_deps="gpl"
2618 pan_filter_deps="swresample"
2619 phase_filter_deps="gpl"
2620 pp_filter_deps="gpl postproc"
2621 pullup_filter_deps="gpl"
2622 removelogo_filter_deps="avcodec avformat swscale"
2623 repeatfields_filter_deps="gpl"
2624 resample_filter_deps="avresample"
2625 sab_filter_deps="gpl swscale"
2626 scale_filter_deps="swscale"
2627 select_filter_select="pixelutils"
2628 smartblur_filter_deps="gpl swscale"
2629 showspectrum_filter_deps="avcodec"
2630 showspectrum_filter_select="rdft"
2631 spp_filter_deps="gpl avcodec"
2632 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
2633 stereo3d_filter_deps="gpl"
2634 subtitles_filter_deps="avformat avcodec libass"
2635 super2xsai_filter_deps="gpl"
2636 tinterlace_filter_deps="gpl"
2637 vidstabdetect_filter_deps="libvidstab"
2638 vidstabtransform_filter_deps="libvidstab"
2639 pixfmts_super2xsai_test_deps="super2xsai_filter"
2640 tinterlace_merge_test_deps="tinterlace_filter"
2641 tinterlace_pad_test_deps="tinterlace_filter"
2642 uspp_filter_deps="gpl avcodec"
2643 zmq_filter_deps="libzmq"
2644 zoompan_filter_deps="swscale"
2645
2646 # examples
2647 avio_reading="avformat avcodec avutil"
2648 avcodec_example_deps="avcodec avutil"
2649 decoding_encoding_example_deps="avcodec avformat avutil"
2650 demuxing_decoding_example_deps="avcodec avformat avutil"
2651 extract_mvs_example_deps="avcodec avformat avutil"
2652 filter_audio_example_deps="avfilter avutil"
2653 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2654 filtering_video_example_deps="avfilter avcodec avformat avutil"
2655 metadata_example_deps="avformat avutil"
2656 muxing_example_deps="avcodec avformat avutil swscale"
2657 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2658 remuxing_example_deps="avcodec avformat avutil"
2659 resampling_audio_example_deps="avutil swresample"
2660 scaling_video_example_deps="avutil swscale"
2661 transcode_aac_example_deps="avcodec avformat swresample"
2662 transcoding_example_deps="avfilter avcodec avformat avutil"
2663
2664 # libraries, in linking order
2665 avcodec_deps="avutil"
2666 avdevice_deps="avformat avcodec avutil"
2667 avfilter_deps="avutil"
2668 avformat_deps="avcodec avutil"
2669 avresample_deps="avutil"
2670 postproc_deps="avutil gpl"
2671 swresample_deps="avutil"
2672 swscale_deps="avutil"
2673
2674 # programs
2675 ffmpeg_deps="avcodec avfilter avformat swresample"
2676 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2677                null_filter
2678                setpts_filter trim_filter"
2679 ffplay_deps="avcodec avformat swscale swresample sdl"
2680 ffplay_libs='$sdl_libs'
2681 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
2682 ffprobe_deps="avcodec avformat"
2683 ffserver_deps="avformat fork sarestart"
2684 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2685
2686 # documentation
2687 podpages_deps="perl"
2688 manpages_deps="perl pod2man"
2689 htmlpages_deps="perl"
2690 htmlpages_deps_any="makeinfo_html texi2html"
2691 txtpages_deps="perl makeinfo"
2692 doc_deps_any="manpages htmlpages podpages txtpages"
2693
2694 # default parameters
2695
2696 logfile="config.log"
2697
2698 # installation paths
2699 prefix_default="/usr/local"
2700 bindir_default='${prefix}/bin'
2701 datadir_default='${prefix}/share/ffmpeg'
2702 docdir_default='${prefix}/share/doc/ffmpeg'
2703 incdir_default='${prefix}/include'
2704 libdir_default='${prefix}/lib'
2705 mandir_default='${prefix}/share/man'
2706
2707 # toolchain
2708 ar_default="ar"
2709 cc_default="gcc"
2710 cxx_default="g++"
2711 host_cc_default="gcc"
2712 cp_f="cp -f"
2713 doxygen_default="doxygen"
2714 install="install"
2715 ln_s="ln -s -f"
2716 nm_default="nm -g"
2717 objformat="elf"
2718 pkg_config_default=pkg-config
2719 if ranlib 2>&1 | grep -q "\-D "; then
2720     ranlib_default="ranlib -D"
2721 else
2722     ranlib_default="ranlib"
2723 fi
2724 strip_default="strip"
2725 yasmexe_default="yasm"
2726 windres_default="windres"
2727
2728 # OS
2729 target_os_default=$(tolower $(uname -s))
2730 host_os=$target_os_default
2731
2732 # machine
2733 if test "$target_os_default" = aix; then
2734     arch_default=$(uname -p)
2735     strip_default="strip -X32_64"
2736 else
2737     arch_default=$(uname -m)
2738 fi
2739 cpu="generic"
2740 intrinsics="none"
2741
2742 # configurable options
2743 enable $PROGRAM_LIST
2744 enable $DOCUMENT_LIST
2745 enable $EXAMPLE_LIST
2746 enable $(filter_out avresample $LIBRARY_LIST)
2747 enable stripping
2748
2749 enable asm
2750 enable debug
2751 enable doc
2752 enable faan faandct faanidct
2753 enable optimizations
2754 enable runtime_cpudetect
2755 enable safe_bitstream_reader
2756 enable static
2757 enable swscale_alpha
2758
2759 sws_max_filter_size_default=256
2760 set_default sws_max_filter_size
2761
2762 # Enable hwaccels by default.
2763 enable dxva2 vaapi vda vdpau xvmc
2764 enable xlib
2765
2766 # build settings
2767 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2768 LIBPREF="lib"
2769 LIBSUF=".a"
2770 FULLNAME='$(NAME)$(BUILDSUF)'
2771 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2772 SLIBPREF="lib"
2773 SLIBSUF=".so"
2774 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2775 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2776 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2777 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2778 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2779 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2780
2781 asflags_filter=echo
2782 cflags_filter=echo
2783 ldflags_filter=echo
2784
2785 AS_C='-c'
2786 AS_O='-o $@'
2787 CC_C='-c'
2788 CC_E='-E -o $@'
2789 CC_O='-o $@'
2790 CXX_C='-c'
2791 CXX_O='-o $@'
2792 LD_O='-o $@'
2793 LD_LIB='-l%'
2794 LD_PATH='-L'
2795 HOSTCC_C='-c'
2796 HOSTCC_E='-E -o $@'
2797 HOSTCC_O='-o $@'
2798 HOSTLD_O='-o $@'
2799
2800 host_libs='-lm'
2801 host_cflags_filter=echo
2802 host_ldflags_filter=echo
2803
2804 target_path='$(CURDIR)'
2805
2806 # since the object filename is not given with the -MM flag, the compiler
2807 # is only able to print the basename, and we must add the path ourselves
2808 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2809 DEPFLAGS='-MM'
2810
2811 # find source path
2812 if test -f configure; then
2813     source_path=.
2814 else
2815     source_path=$(cd $(dirname "$0"); pwd)
2816     echo "$source_path" | grep -q '[[:blank:]]' &&
2817         die "Out of tree builds are impossible with whitespace in source path."
2818     test -e "$source_path/config.h" &&
2819         die "Out of tree builds are impossible with config.h in source dir."
2820 fi
2821
2822 for v in "$@"; do
2823     r=${v#*=}
2824     l=${v%"$r"}
2825     r=$(sh_quote "$r")
2826     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2827 done
2828
2829 find_things(){
2830     thing=$1
2831     pattern=$2
2832     file=$source_path/$3
2833     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2834 }
2835
2836 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2837 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2838 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2839 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2840 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2841 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2842 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2843 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2844 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2845 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2846 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2847
2848 ALL_COMPONENTS="
2849     $BSF_LIST
2850     $DECODER_LIST
2851     $DEMUXER_LIST
2852     $ENCODER_LIST
2853     $FILTER_LIST
2854     $HWACCEL_LIST
2855     $INDEV_LIST
2856     $MUXER_LIST
2857     $OUTDEV_LIST
2858     $PARSER_LIST
2859     $PROTOCOL_LIST
2860 "
2861
2862 for n in $COMPONENT_LIST; do
2863     v=$(toupper ${n%s})_LIST
2864     eval enable \$$v
2865     eval ${n}_if_any="\$$v"
2866 done
2867
2868 enable $ARCH_EXT_LIST
2869
2870 die_unknown(){
2871     echo "Unknown option \"$1\"."
2872     echo "See $0 --help for available options."
2873     exit 1
2874 }
2875
2876 print_3_columns() {
2877     cat | tr ' ' '\n' | sort | pr -r -3 -t
2878 }
2879
2880 show_list() {
2881     suffix=_$1
2882     shift
2883     echo $* | sed s/$suffix//g | print_3_columns
2884     exit 0
2885 }
2886
2887 rand_list(){
2888     IFS=', '
2889     set -- $*
2890     unset IFS
2891     for thing; do
2892         comp=${thing%:*}
2893         prob=${thing#$comp}
2894         prob=${prob#:}
2895         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2896         echo "prob ${prob:-0.5}"
2897         printf '%s\n' $comp
2898     done
2899 }
2900
2901 do_random(){
2902     action=$1
2903     shift
2904     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2905     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2906 }
2907
2908 for opt do
2909     optval="${opt#*=}"
2910     case "$opt" in
2911         --extra-ldflags=*)
2912             add_ldflags $optval
2913         ;;
2914         --extra-ldexeflags=*)
2915             add_ldexeflags $optval
2916         ;;
2917         --extra-libs=*)
2918             add_extralibs $optval
2919         ;;
2920         --disable-devices)
2921             disable $INDEV_LIST $OUTDEV_LIST
2922         ;;
2923         --enable-debug=*)
2924             debuglevel="$optval"
2925         ;;
2926         --disable-programs)
2927             disable $PROGRAM_LIST
2928         ;;
2929         --disable-everything)
2930             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2931         ;;
2932         --disable-all)
2933             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2934             disable $LIBRARY_LIST $PROGRAM_LIST doc
2935         ;;
2936         --enable-random|--disable-random)
2937             action=${opt%%-random}
2938             do_random ${action#--} $COMPONENT_LIST
2939         ;;
2940         --enable-random=*|--disable-random=*)
2941             action=${opt%%-random=*}
2942             do_random ${action#--} $optval
2943         ;;
2944         --enable-*=*|--disable-*=*)
2945             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2946             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2947             eval list=\$$(toupper $thing)_LIST
2948             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2949             list=$(filter "$name" $list)
2950             [ "$list" = "" ] && warn "Option $opt did not match anything"
2951             $action $list
2952         ;;
2953         --enable-?*|--disable-?*)
2954             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2955             if is_in $option $COMPONENT_LIST; then
2956                 test $action = disable && action=unset
2957                 eval $action \$$(toupper ${option%s})_LIST
2958             elif is_in $option $CMDLINE_SELECT; then
2959                 $action $option
2960             else
2961                 die_unknown $opt
2962             fi
2963         ;;
2964         --list-*)
2965             NAME="${opt#--list-}"
2966             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2967             NAME=${NAME%s}
2968             eval show_list $NAME \$$(toupper $NAME)_LIST
2969         ;;
2970         --help|-h) show_help
2971         ;;
2972         --fatal-warnings) enable fatal_warnings
2973         ;;
2974         *)
2975             optname="${opt%%=*}"
2976             optname="${optname#--}"
2977             optname=$(echo "$optname" | sed 's/-/_/g')
2978             if is_in $optname $CMDLINE_SET; then
2979                 eval $optname='$optval'
2980             elif is_in $optname $CMDLINE_APPEND; then
2981                 append $optname "$optval"
2982             else
2983                 die_unknown $opt
2984             fi
2985         ;;
2986     esac
2987 done
2988
2989 disabled logging && logfile=/dev/null
2990
2991 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2992 set >> $logfile
2993
2994 test -n "$cross_prefix" && enable cross_compile
2995
2996 if enabled cross_compile; then
2997     test -n "$arch" && test -n "$target_os" ||
2998         die "Must specify target arch and OS when cross-compiling"
2999 fi
3000
3001 test -n "$valgrind" && toolchain="valgrind-memcheck"
3002
3003 case "$toolchain" in
3004     clang-asan)
3005         cc_default="clang"
3006         add_cflags  -fsanitize=address
3007         add_ldflags -fsanitize=address
3008     ;;
3009     clang-tsan)
3010         cc_default="clang"
3011         add_cflags  -fsanitize=thread -pie
3012         add_ldflags -fsanitize=thread -pie
3013     ;;
3014     clang-usan)
3015         cc_default="clang"
3016         add_cflags  -fsanitize=undefined
3017         add_ldflags -fsanitize=undefined
3018     ;;
3019     gcc-asan)
3020         cc_default="gcc"
3021         add_cflags  -fsanitize=address
3022         add_ldflags -fsanitize=address
3023     ;;
3024     gcc-tsan)
3025         cc_default="gcc"
3026         add_cflags  -fsanitize=thread -pie -fPIC
3027         add_ldflags -fsanitize=thread -pie -fPIC
3028     ;;
3029     gcc-usan)
3030         cc_default="gcc"
3031         add_cflags  -fsanitize=undefined
3032         add_ldflags -fsanitize=undefined
3033     ;;
3034     valgrind-massif)
3035         target_exec_default=${valgrind:-"valgrind"}
3036         target_exec_args="--tool=massif --alloc-fn=av_malloc --alloc-fn=av_mallocz --alloc-fn=av_calloc --alloc-fn=av_fast_padded_malloc --alloc-fn=av_fast_malloc --alloc-fn=av_realloc_f --alloc-fn=av_fast_realloc --alloc-fn=av_realloc"
3037     ;;
3038     valgrind-memcheck)
3039         target_exec_default=${valgrind:-"valgrind"}
3040         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3041     ;;
3042     msvc)
3043         # Check whether the current MSVC version needs the C99 converter.
3044         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3045         # support enough of C99 to build ffmpeg. Default to the new
3046         # behaviour if the regexp was unable to match anything, since this
3047         # successfully parses the version number of existing supported
3048         # versions that require the converter (MSVC 2010 and 2012).
3049         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3050         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3051             cc_default="cl"
3052         else
3053             cc_default="c99wrap cl"
3054         fi
3055         ld_default="link"
3056         nm_default="dumpbin -symbols"
3057         ar_default="lib"
3058         target_os_default="win32"
3059         # Use a relative path for TMPDIR. This makes sure all the
3060         # ffconf temp files are written with a relative path, avoiding
3061         # issues with msys/win32 path conversion for MSVC parameters
3062         # such as -Fo<file> or -out:<file>.
3063         TMPDIR=.
3064     ;;
3065     icl)
3066         cc_default="icl"
3067         ld_default="xilink"
3068         nm_default="dumpbin -symbols"
3069         ar_default="xilib"
3070         target_os_default="win32"
3071         TMPDIR=.
3072     ;;
3073     gcov)
3074         add_cflags  -fprofile-arcs -ftest-coverage
3075         add_ldflags -fprofile-arcs -ftest-coverage
3076     ;;
3077     hardened)
3078         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3079         add_cflags   -fno-strict-overflow -fstack-protector-all
3080         add_ldflags  -Wl,-z,relro -Wl,-z,now
3081     ;;
3082     ?*)
3083         die "Unknown toolchain $toolchain"
3084     ;;
3085 esac
3086
3087 ar_default="${cross_prefix}${ar_default}"
3088 cc_default="${cross_prefix}${cc_default}"
3089 cxx_default="${cross_prefix}${cxx_default}"
3090 nm_default="${cross_prefix}${nm_default}"
3091 pkg_config_default="${cross_prefix}${pkg_config_default}"
3092 ranlib_default="${cross_prefix}${ranlib_default}"
3093 strip_default="${cross_prefix}${strip_default}"
3094 windres_default="${cross_prefix}${windres_default}"
3095
3096 sysinclude_default="${sysroot}/usr/include"
3097
3098 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3099     target_exec target_os yasmexe
3100 enabled cross_compile || host_cc_default=$cc
3101 set_default host_cc
3102
3103 pkg_config_fail_message=""
3104 if ! $pkg_config --version >/dev/null 2>&1; then
3105     warn "$pkg_config not found, library detection may fail."
3106     pkg_config=false
3107 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3108     pkg_config_fail_message="
3109 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3110 fi
3111
3112 if test $doxygen != $doxygen_default && \
3113   ! $doxygen --version >/dev/null 2>&1; then
3114     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3115 fi
3116
3117 exesuf() {
3118     case $1 in
3119         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3120     esac
3121 }
3122
3123 EXESUF=$(exesuf $target_os)
3124 HOSTEXESUF=$(exesuf $host_os)
3125
3126 # set temporary file name
3127 : ${TMPDIR:=$TEMPDIR}
3128 : ${TMPDIR:=$TMP}
3129 : ${TMPDIR:=/tmp}
3130
3131 if [ -n "$tempprefix" ] ; then
3132     mktemp(){
3133         echo $tempprefix.${HOSTNAME}.${UID}
3134     }
3135 elif ! check_cmd mktemp -u XXXXXX; then
3136     # simple replacement for missing mktemp
3137     # NOT SAFE FOR GENERAL USE
3138     mktemp(){
3139         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3140     }
3141 fi
3142
3143 tmpfile(){
3144     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
3145         (set -C; exec > $tmp) 2>/dev/null ||
3146         die "Unable to create temporary file in $TMPDIR."
3147     append TMPFILES $tmp
3148     eval $1=$tmp
3149 }
3150
3151 trap 'rm -f -- $TMPFILES' EXIT
3152
3153 tmpfile TMPASM .asm
3154 tmpfile TMPC   .c
3155 tmpfile TMPCPP .cpp
3156 tmpfile TMPE   $EXESUF
3157 tmpfile TMPH   .h
3158 tmpfile TMPM   .m
3159 tmpfile TMPO   .o
3160 tmpfile TMPS   .S
3161 tmpfile TMPSH  .sh
3162 tmpfile TMPV   .ver
3163
3164 unset -f mktemp
3165
3166 chmod +x $TMPE
3167
3168 # make sure we can execute files in $TMPDIR
3169 cat > $TMPSH 2>> $logfile <<EOF
3170 #! /bin/sh
3171 EOF
3172 chmod +x $TMPSH >> $logfile 2>&1
3173 if ! $TMPSH >> $logfile 2>&1; then
3174     cat <<EOF
3175 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3176 variable to another directory and make sure that it is not mounted noexec.
3177 EOF
3178     die "Sanity test failed."
3179 fi
3180
3181 armasm_flags(){
3182     for flag; do
3183         case $flag in
3184             # Filter out MSVC cl.exe options from cflags that shouldn't
3185             # be passed to gas-preprocessor
3186             -M[TD]*)                                            ;;
3187             *)                  echo $flag                      ;;
3188         esac
3189    done
3190 }
3191
3192 ccc_flags(){
3193     for flag; do
3194         case $flag in
3195             -std=c99)           echo -c99                       ;;
3196             -mcpu=*)            echo -arch ${flag#*=}           ;;
3197             -mieee)             echo -ieee                      ;;
3198             -O*|-fast)          echo $flag                      ;;
3199             -fno-math-errno)    echo -assume nomath_errno       ;;
3200             -g)                 echo -g3                        ;;
3201             -Wall)              echo -msg_enable level2         ;;
3202             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3203             -Wl,*)              echo $flag                      ;;
3204             -f*|-W*)                                            ;;
3205             *)                  echo $flag                      ;;
3206         esac
3207    done
3208 }
3209
3210 cparser_flags(){
3211     for flag; do
3212         case $flag in
3213             -Wno-switch)             echo -Wno-switch-enum ;;
3214             -Wno-format-zero-length) ;;
3215             -Wdisabled-optimization) ;;
3216             -Wno-pointer-sign)       echo -Wno-other ;;
3217             *)                       echo $flag ;;
3218         esac
3219     done
3220 }
3221
3222 msvc_common_flags(){
3223     for flag; do
3224         case $flag in
3225             # In addition to specifying certain flags under the compiler
3226             # specific filters, they must be specified here as well or else the
3227             # generic catch all at the bottom will print the original flag.
3228             -Wall)                ;;
3229             -std=c99)             ;;
3230             # Common flags
3231             -fomit-frame-pointer) ;;
3232             -g)                   echo -Z7 ;;
3233             -fno-math-errno)      ;;
3234             -fno-common)          ;;
3235             -fno-signed-zeros)    ;;
3236             -fPIC)                ;;
3237             -mthumb)              ;;
3238             -march=*)             ;;
3239             -lz)                  echo zlib.lib ;;
3240             -lavifil32)           echo vfw32.lib ;;
3241             -lavicap32)           echo vfw32.lib user32.lib ;;
3242             -l*)                  echo ${flag#-l}.lib ;;
3243             -L*)                  echo -libpath:${flag#-L} ;;
3244             *)                    echo $flag ;;
3245         esac
3246     done
3247 }
3248
3249 msvc_flags(){
3250     msvc_common_flags "$@"
3251     for flag; do
3252         case $flag in
3253             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3254                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3255                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3256                                        -wd4554 \
3257                                        -wd4273 -wd4701 ;;
3258         esac
3259     done
3260 }
3261
3262 icl_flags(){
3263     msvc_common_flags "$@"
3264     for flag; do
3265         case $flag in
3266             # Despite what Intel's documentation says -Wall, which is supported
3267             # on Windows, does enable remarks so disable them here.
3268             -Wall)                echo $flag -Qdiag-disable:remark ;;
3269             -std=c99)             echo -Qstd=c99 ;;
3270             -flto)                echo -ipo ;;
3271         esac
3272     done
3273 }
3274
3275 icc_flags(){
3276     for flag; do
3277         case $flag in
3278             -flto)                echo -ipo ;;
3279             *)                    echo $flag ;;
3280         esac
3281     done
3282 }
3283
3284 pgi_flags(){
3285     for flag; do
3286         case $flag in
3287             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3288             -fomit-frame-pointer) echo -Mnoframe ;;
3289             -g)                   echo -gopt ;;
3290             *)                    echo $flag ;;
3291         esac
3292     done
3293 }
3294
3295 suncc_flags(){
3296     for flag; do
3297         case $flag in
3298             -march=*|-mcpu=*)
3299                 case "${flag#*=}" in
3300                     native)                   echo -xtarget=native       ;;
3301                     v9|niagara)               echo -xarch=sparc          ;;
3302                     ultrasparc)               echo -xarch=sparcvis       ;;
3303                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3304                     i586|pentium)             echo -xchip=pentium        ;;
3305                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3306                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3307                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3308                     pentium4*)          echo -xtarget=pentium4           ;;
3309                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3310                     *-sse3)             echo -xarch=sse3                 ;;
3311                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3312                     bonnell)                   echo -xarch=ssse3         ;;
3313                     corei7|nehalem)            echo -xtarget=nehalem     ;;
3314                     westmere)                  echo -xtarget=westmere    ;;
3315                     silvermont)                echo -xarch=sse4_2        ;;
3316                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
3317                     core-avx*|ivybridge|haswell|broadwell)
3318                                                echo -xarch=avx           ;;
3319                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
3320                     btver1)                    echo -xarch=amdsse4a      ;;
3321                     btver2|bdver*)             echo -xarch=avx           ;;
3322                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3323                     k8|opteron|athlon64|athlon-fx)
3324                                                echo -xarch=sse2a         ;;
3325                     athlon*)                   echo -xarch=pentium_proa  ;;
3326                 esac
3327                 ;;
3328             -std=c99)             echo -xc99              ;;
3329             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3330             -fPIC)                echo -KPIC -xcode=pic32 ;;
3331             -W*,*)                echo $flag              ;;
3332             -f*-*|-W*|-mimpure-text)                      ;;
3333             -shared)              echo -G                 ;;
3334             *)                    echo $flag              ;;
3335         esac
3336     done
3337 }
3338
3339 tms470_flags(){
3340     for flag; do
3341         case $flag in
3342             -march=*|-mcpu=*)
3343                 case "${flag#*=}" in
3344                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3345                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3346                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3347                     armv6*|arm11*)          echo -mv=6   ;;
3348                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3349                                             echo -mv=5e  ;;
3350                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3351                 esac
3352                 ;;
3353             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3354             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3355             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3356             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3357             -msoft-float)   echo --float_support=vfplib       ;;
3358             -O[0-3]|-mf=*)  echo $flag                        ;;
3359             -g)             echo -g -mn                       ;;
3360             -pds=*)         echo $flag                        ;;
3361             -D*|-I*)        echo $flag                        ;;
3362             --gcc|--abi=*)  echo $flag                        ;;
3363             -me)            echo $flag                        ;;
3364         esac
3365     done
3366 }
3367
3368 probe_cc(){
3369     pfx=$1
3370     _cc=$2
3371
3372     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3373     unset _ld_o _ldflags _ld_lib _ld_path
3374     unset _depflags _DEPCMD _DEPFLAGS
3375     _flags_filter=echo
3376
3377     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3378         true # no-op to avoid reading stdin in following checks
3379     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3380         _type=llvm_gcc
3381         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
3382         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
3383         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3384         _cflags_speed='-O3'
3385         _cflags_size='-Os'
3386     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3387         _type=gcc
3388         gcc_version=$($_cc --version | head -n1)
3389         gcc_basever=$($_cc -dumpversion)
3390         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3391         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3392         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3393         if ! $_cc -dumpversion | grep -q '^2\.'; then
3394             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3395         fi
3396         _cflags_speed='-O3'
3397         _cflags_size='-Os'
3398     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3399         _type=icc
3400         _ident=$($_cc --version | head -n1)
3401         _depflags='-MMD'
3402         _cflags_speed='-O3'
3403         _cflags_size='-Os'
3404         _cflags_noopt='-O1'
3405         _flags_filter=icc_flags
3406     elif $_cc -v 2>&1 | grep -q xlc; then
3407         _type=xlc
3408         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3409         _cflags_speed='-O5'
3410         _cflags_size='-O5 -qcompact'
3411     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3412         _type=ccc
3413         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3414         _DEPFLAGS='-M'
3415         _cflags_speed='-fast'
3416         _cflags_size='-O1'
3417         _flags_filter=ccc_flags
3418     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3419         test -d "$sysroot" || die "No valid sysroot specified."
3420         _type=armcc
3421         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3422         armcc_conf="$PWD/armcc.conf"
3423         $_cc --arm_linux_configure                 \
3424              --arm_linux_config_file="$armcc_conf" \
3425              --configure_sysroot="$sysroot"        \
3426              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3427              die "Error creating armcc configuration file."
3428         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3429         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3430         as_default="${cross_prefix}gcc"
3431         _depflags='-MMD'
3432         _cflags_speed='-O3'
3433         _cflags_size='-Os'
3434     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3435         _type=tms470
3436         _ident=$($_cc -version | head -n1 | tr -s ' ')
3437         _flags='--gcc --abi=eabi -me'
3438         _cc_e='-ppl -fe=$@'
3439         _cc_o='-fe=$@'
3440         _depflags='-ppa -ppd=$(@:.o=.d)'
3441         _cflags_speed='-O3 -mf=5'
3442         _cflags_size='-O3 -mf=2'
3443         _flags_filter=tms470_flags
3444     elif $_cc -v 2>&1 | grep -q clang; then
3445         _type=clang
3446         _ident=$($_cc --version | head -n1)
3447         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3448         _cflags_speed='-O3'
3449         _cflags_size='-Os'
3450     elif $_cc -V 2>&1 | grep -q Sun; then
3451         _type=suncc
3452         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3453         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3454         _DEPFLAGS='-xM1 -xc99'
3455         _ldflags='-std=c99'
3456         _cflags_speed='-O5'
3457         _cflags_size='-O5 -xspace'
3458         _flags_filter=suncc_flags
3459     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3460         _type=pathscale
3461         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3462         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3463         _cflags_speed='-O2'
3464         _cflags_size='-Os'
3465         _flags_filter='filter_out -Wdisabled-optimization'
3466     elif $_cc -v 2>&1 | grep -q Open64; then
3467         _type=open64
3468         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3469         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3470         _cflags_speed='-O2'
3471         _cflags_size='-Os'
3472         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3473     elif $_cc -V 2>&1 | grep -q Portland; then
3474         _type=pgi
3475         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3476         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3477         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3478         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3479         _cflags_noopt="-O"
3480         _flags_filter=pgi_flags
3481     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3482         _type=armasm
3483         _ident=$($_cc | head -n1)
3484         # 4509: "This form of conditional instruction is deprecated"
3485         _flags="-nologo -ignore 4509"
3486         _flags_filter=armasm_flags
3487     elif $_cc 2>&1 | grep -q Intel; then
3488         _type=icl
3489         _ident=$($cc 2>&1 | head -n1)
3490         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3491         # Not only is O3 broken on 13.x+ but it is slower on all previous
3492         # versions (tested) as well.
3493         _cflags_speed="-O2"
3494         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3495         if $_cc 2>&1 | grep -q Linker; then
3496             _ld_o='-out:$@'
3497         else
3498             _ld_o='-Fe$@'
3499         fi
3500         _cc_o='-Fo$@'
3501         _cc_e='-P'
3502         _flags_filter=icl_flags
3503         _ld_lib='lib%.a'
3504         _ld_path='-libpath:'
3505         # -Qdiag-error to make icl error when seeing certain unknown arguments
3506         _flags='-nologo -Qdiag-error:4044,10157'
3507         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
3508         # with MSVC which enables it by default.
3509         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS -fp:precise'
3510         if [ $pfx = hostcc ]; then
3511             append _cflags -Dsnprintf=_snprintf
3512         fi
3513         disable stripping
3514     elif $_cc 2>&1 | grep -q Microsoft; then
3515         _type=msvc
3516         _ident=$($cc 2>&1 | head -n1)
3517         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3518         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3519         _cflags_speed="-O2"
3520         _cflags_size="-O1"
3521         if $_cc 2>&1 | grep -q Linker; then
3522             _ld_o='-out:$@'
3523         else
3524             _ld_o='-Fe$@'
3525         fi
3526         _cc_o='-Fo$@'
3527         _cc_e='-P -Fi$@'
3528         _flags_filter=msvc_flags
3529         _ld_lib='lib%.a'
3530         _ld_path='-libpath:'
3531         _flags='-nologo'
3532         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3533         if [ $pfx = hostcc ]; then
3534             append _cflags -Dsnprintf=_snprintf
3535         fi
3536         disable stripping
3537     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3538         _type=cparser
3539         _ident=$($_cc --version | head -n1)
3540         _depflags='-MMD'
3541         _cflags_speed='-O4'
3542         _cflags_size='-O2'
3543         _flags_filter=cparser_flags
3544     fi
3545
3546     eval ${pfx}_type=\$_type
3547     eval ${pfx}_ident=\$_ident
3548 }
3549
3550 set_ccvars(){
3551     eval ${1}_C=\${_cc_c-\${${1}_C}}
3552     eval ${1}_E=\${_cc_e-\${${1}_E}}
3553     eval ${1}_O=\${_cc_o-\${${1}_O}}
3554
3555     if [ -n "$_depflags" ]; then
3556         eval ${1}_DEPFLAGS=\$_depflags
3557     else
3558         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3559         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3560         eval DEP${1}FLAGS=\$_flags
3561     fi
3562 }
3563
3564 probe_cc cc "$cc"
3565 cflags_filter=$_flags_filter
3566 cflags_speed=$_cflags_speed
3567 cflags_size=$_cflags_size
3568 cflags_noopt=$_cflags_noopt
3569 add_cflags $_flags $_cflags
3570 cc_ldflags=$_ldflags
3571 set_ccvars CC
3572
3573 probe_cc hostcc "$host_cc"
3574 host_cflags_filter=$_flags_filter
3575 add_host_cflags  $_flags $_cflags
3576 set_ccvars HOSTCC
3577
3578 test -n "$cc_type" && enable $cc_type ||
3579     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3580
3581 : ${as_default:=$cc}
3582 : ${dep_cc_default:=$cc}
3583 : ${ld_default:=$cc}
3584 : ${host_ld_default:=$host_cc}
3585 set_default ar as dep_cc ld host_ld windres
3586
3587 probe_cc as "$as"
3588 asflags_filter=$_flags_filter
3589 add_asflags $_flags $_cflags
3590 set_ccvars AS
3591
3592 probe_cc ld "$ld"
3593 ldflags_filter=$_flags_filter
3594 add_ldflags $_flags $_ldflags
3595 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3596 LD_O=${_ld_o-$LD_O}
3597 LD_LIB=${_ld_lib-$LD_LIB}
3598 LD_PATH=${_ld_path-$LD_PATH}
3599
3600 probe_cc hostld "$host_ld"
3601 host_ldflags_filter=$_flags_filter
3602 add_host_ldflags $_flags $_ldflags
3603 HOSTLD_O=${_ld_o-$HOSTLD_O}
3604
3605 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3606     probe_cc depcc "$dep_cc"
3607     CCDEP=${_DEPCMD:-$DEPCMD}
3608     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3609     DEPCCFLAGS=$_flags
3610 fi
3611
3612 if $ar 2>&1 | grep -q Microsoft; then
3613     arflags="-nologo"
3614     ar_o='-out:$@'
3615 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3616     arflags="rq"
3617     ar_o='$@'
3618 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3619     arflags='-Xany -r -c'
3620     ar_o='$@'
3621 elif $ar 2>&1 | grep -q "\[D\] "; then
3622     arflags="rcD"
3623     ar_o='$@'
3624 else
3625     arflags="rc"
3626     ar_o='$@'
3627 fi
3628
3629 add_cflags $extra_cflags
3630 add_cxxflags $extra_cxxflags
3631 add_asflags $extra_cflags
3632
3633 if test -n "$sysroot"; then
3634     case "$cc_type" in
3635         gcc|llvm_gcc|clang)
3636             add_cppflags --sysroot="$sysroot"
3637             add_ldflags --sysroot="$sysroot"
3638 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
3639             add_cppflags -isysroot "$sysroot"
3640             add_ldflags -isysroot "$sysroot"
3641         ;;
3642         tms470)
3643             add_cppflags -I"$sysinclude"
3644             add_ldflags  --sysroot="$sysroot"
3645         ;;
3646     esac
3647 fi
3648
3649 if test "$cpu" = host; then
3650     enabled cross_compile &&
3651         die "--cpu=host makes no sense when cross-compiling."
3652
3653     case "$cc_type" in
3654         gcc|llvm_gcc)
3655             check_native(){
3656                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3657                 sed -n "/cc1.*$1=/{
3658                             s/.*$1=\\([^ ]*\\).*/\\1/
3659                             p
3660                             q
3661                         }" $TMPE
3662             }
3663             cpu=$(check_native -march || check_native -mcpu)
3664         ;;
3665     esac
3666
3667     test "${cpu:-host}" = host &&
3668         die "--cpu=host not supported with compiler $cc"
3669 fi
3670
3671 # Deal with common $arch aliases
3672 case "$arch" in
3673     aarch64|arm64)
3674         arch="aarch64"
3675     ;;
3676     arm*|iPad*|iPhone*)
3677         arch="arm"
3678     ;;
3679     mips*|IP*)
3680         arch="mips"
3681     ;;
3682     parisc*|hppa*)
3683         arch="parisc"
3684     ;;
3685     "Power Macintosh"|ppc*|powerpc*)
3686         arch="ppc"
3687     ;;
3688     s390|s390x)
3689         arch="s390"
3690     ;;
3691     sh4|sh)
3692         arch="sh4"
3693     ;;
3694     sun4u|sparc*)
3695         arch="sparc"
3696     ;;
3697     tilegx|tile-gx)
3698         arch="tilegx"
3699     ;;
3700     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3701         arch="x86"
3702     ;;
3703 esac
3704
3705 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3706 enable $arch
3707
3708 # Add processor-specific flags
3709 if enabled aarch64; then
3710
3711     case $cpu in
3712         armv*)
3713             cpuflags="-march=$cpu"
3714         ;;
3715         *)
3716             cpuflags="-mcpu=$cpu"
3717         ;;
3718     esac
3719
3720 elif enabled alpha; then
3721
3722     cpuflags="-mcpu=$cpu"
3723
3724 elif enabled arm; then
3725
3726     check_arm_arch() {
3727         check_cpp_condition stddef.h \
3728             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3729             $cpuflags
3730     }
3731
3732     probe_arm_arch() {
3733         if   check_arm_arch 4;        then echo armv4;
3734         elif check_arm_arch 4T;       then echo armv4t;
3735         elif check_arm_arch 5;        then echo armv5;
3736         elif check_arm_arch 5E;       then echo armv5e;
3737         elif check_arm_arch 5T;       then echo armv5t;
3738         elif check_arm_arch 5TE;      then echo armv5te;
3739         elif check_arm_arch 5TEJ;     then echo armv5te;
3740         elif check_arm_arch 6;        then echo armv6;
3741         elif check_arm_arch 6J;       then echo armv6j;
3742         elif check_arm_arch 6K;       then echo armv6k;
3743         elif check_arm_arch 6Z;       then echo armv6z;
3744         elif check_arm_arch 6ZK;      then echo armv6zk;
3745         elif check_arm_arch 6T2;      then echo armv6t2;
3746         elif check_arm_arch 7;        then echo armv7;
3747         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3748         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3749         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3750         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3751         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3752         fi
3753     }
3754
3755     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3756
3757     case $cpu in
3758         armv*)
3759             cpuflags="-march=$cpu"
3760             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3761         ;;
3762         *)
3763             cpuflags="-mcpu=$cpu"
3764             case $cpu in
3765                 cortex-a*)                               subarch=armv7a  ;;
3766                 cortex-r*)                               subarch=armv7r  ;;
3767                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3768                 arm11*)                                  subarch=armv6   ;;
3769                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3770                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3771                 *)                             subarch=$(probe_arm_arch) ;;
3772             esac
3773         ;;
3774     esac
3775
3776     case "$subarch" in
3777         armv5t*)    enable fast_clz                ;;
3778         armv[6-8]*)
3779             enable fast_clz
3780             disabled fast_unaligned || enable fast_unaligned
3781             ;;
3782     esac
3783
3784 elif enabled avr32; then
3785
3786     case $cpu in
3787         ap7[02]0[0-2])
3788             subarch="avr32_ap"
3789             cpuflags="-mpart=$cpu"
3790         ;;
3791         ap)
3792             subarch="avr32_ap"
3793             cpuflags="-march=$cpu"
3794         ;;
3795         uc3[ab]*)
3796             subarch="avr32_uc"
3797             cpuflags="-mcpu=$cpu"
3798         ;;
3799         uc)
3800             subarch="avr32_uc"
3801             cpuflags="-march=$cpu"
3802         ;;
3803     esac
3804
3805 elif enabled bfin; then
3806
3807     cpuflags="-mcpu=$cpu"
3808
3809 elif enabled mips; then
3810
3811     cpuflags="-march=$cpu"
3812
3813     case $cpu in
3814         24kc)
3815             disable mipsfpu
3816             disable mipsdspr1
3817             disable mipsdspr2
3818         ;;
3819         24kf*)
3820             disable mipsdspr1
3821             disable mipsdspr2
3822         ;;
3823         24kec|34kc|1004kc)
3824             disable mipsfpu
3825             disable mipsdspr2
3826         ;;
3827         24kef*|34kf*|1004kf*)
3828             disable mipsdspr2
3829         ;;
3830         74kc)
3831             disable mipsfpu
3832         ;;
3833     esac
3834
3835 elif enabled ppc; then
3836
3837     disable ldbrx
3838     disable vsx
3839
3840     case $(tolower $cpu) in
3841         601|ppc601|powerpc601)
3842             cpuflags="-mcpu=601"
3843             disable altivec
3844         ;;
3845         603*|ppc603*|powerpc603*)
3846             cpuflags="-mcpu=603"
3847             disable altivec
3848         ;;
3849         604*|ppc604*|powerpc604*)
3850             cpuflags="-mcpu=604"
3851             disable altivec
3852         ;;
3853         g3|75*|ppc75*|powerpc75*)
3854             cpuflags="-mcpu=750"
3855             disable altivec
3856         ;;
3857         g4|745*|ppc745*|powerpc745*)
3858             cpuflags="-mcpu=7450"
3859         ;;
3860         74*|ppc74*|powerpc74*)
3861             cpuflags="-mcpu=7400"
3862         ;;
3863         g5|970|ppc970|powerpc970)
3864             cpuflags="-mcpu=970"
3865         ;;
3866         power[3-8]*)
3867             cpuflags="-mcpu=$cpu"
3868         ;;
3869         cell)
3870             cpuflags="-mcpu=cell"
3871             enable ldbrx
3872         ;;
3873         e500mc)
3874             cpuflags="-mcpu=e500mc"
3875             disable altivec
3876         ;;
3877         e500v2)
3878             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3879             disable altivec
3880             disable dcbzl
3881         ;;
3882         e500)
3883             cpuflags="-mcpu=8540 -mhard-float"
3884             disable altivec
3885             disable dcbzl
3886         ;;
3887     esac
3888
3889 elif enabled sparc; then
3890
3891     case $cpu in
3892         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3893             cpuflags="-mcpu=$cpu"
3894         ;;
3895         ultrasparc*|niagara[234])
3896             cpuflags="-mcpu=$cpu"
3897         ;;
3898     esac
3899
3900 elif enabled x86; then
3901
3902     case $cpu in
3903         i[345]86|pentium)
3904             cpuflags="-march=$cpu"
3905             disable i686
3906             disable mmx
3907         ;;
3908         # targets that do NOT support nopl and conditional mov (cmov)
3909         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3910             cpuflags="-march=$cpu"
3911             disable i686
3912         ;;
3913         # targets that do support nopl and conditional mov (cmov)
3914         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
3915         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|amdfam10|barcelona|b[dt]ver*)
3916             cpuflags="-march=$cpu"
3917             enable i686
3918             enable fast_cmov
3919         ;;
3920         # targets that do support conditional mov but on which it's slow
3921         pentium4|pentium4m|prescott|nocona)
3922             cpuflags="-march=$cpu"
3923             enable i686
3924             disable fast_cmov
3925         ;;
3926     esac
3927
3928 fi
3929
3930 if [ "$cpu" != generic ]; then
3931     add_cflags  $cpuflags
3932     add_asflags $cpuflags
3933 fi
3934
3935 # compiler sanity check
3936 check_exec <<EOF
3937 int main(void){ return 0; }
3938 EOF
3939 if test "$?" != 0; then
3940     echo "$cc is unable to create an executable file."
3941     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3942         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3943         echo "Only do this if you know what cross compiling means."
3944     fi
3945     die "C compiler test failed."
3946 fi
3947
3948 add_cppflags -D_ISOC99_SOURCE
3949 add_cxxflags -D__STDC_CONSTANT_MACROS
3950 check_cflags -std=c99
3951 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3952 #include <stdlib.h>
3953 EOF
3954 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3955 #include <stdlib.h>
3956 EOF
3957
3958 add_host_cppflags -D_ISOC99_SOURCE
3959 check_host_cflags -std=c99
3960 check_host_cflags -Wall
3961 check_host_cflags -O3
3962
3963 check_64bit(){
3964     arch32=$1
3965     arch64=$2
3966     expr=$3
3967     check_code cc "" "int test[2*($expr) - 1]" &&
3968         subarch=$arch64 || subarch=$arch32
3969 }
3970
3971 case "$arch" in
3972     aarch64|alpha|ia64)
3973         spic=$shared
3974     ;;
3975     mips)
3976         check_64bit mips mips64 '_MIPS_SIM > 1'
3977         spic=$shared
3978     ;;
3979     parisc)
3980         check_64bit parisc parisc64 'sizeof(void *) > 4'
3981         spic=$shared
3982     ;;
3983     ppc)
3984         check_64bit ppc ppc64 'sizeof(void *) > 4'
3985         spic=$shared
3986     ;;
3987     s390)
3988         check_64bit s390 s390x 'sizeof(void *) > 4'
3989         spic=$shared
3990     ;;
3991     sparc)
3992         check_64bit sparc sparc64 'sizeof(void *) > 4'
3993         spic=$shared
3994     ;;
3995     x86)
3996         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3997         # Treat x32 as x64 for now. Note it also needs spic=$shared
3998         test "$subarch" = "x86_32" && check_cpp_condition stddef.h 'defined(__x86_64__)' &&
3999             subarch=x86_64
4000         if test "$subarch" = "x86_64"; then
4001             spic=$shared
4002         fi
4003     ;;
4004     ppc)
4005         check_cc <<EOF && subarch="ppc64"
4006         int test[(int)sizeof(char*) - 7];
4007 EOF
4008     ;;
4009 esac
4010
4011 enable $subarch
4012 enabled spic && enable_weak pic
4013
4014 # OS specific
4015 case $target_os in
4016     aix)
4017         SHFLAGS=-shared
4018         add_cppflags '-I\$(SRC_PATH)/compat/aix'
4019         enabled shared && add_ldflags -Wl,-brtl
4020         ;;
4021     android)
4022         disable symver
4023         enable section_data_rel_ro
4024         SLIB_INSTALL_NAME='$(SLIBNAME)'
4025         SLIB_INSTALL_LINKS=
4026         # soname not set on purpose
4027         SHFLAGS=-shared
4028         ;;
4029     haiku)
4030         prefix_default="/boot/common"
4031         network_extralibs="-lnetwork"
4032         host_libs=
4033         ;;
4034     sunos)
4035         SHFLAGS='-shared -Wl,-h,$$(@F)'
4036         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
4037         network_extralibs="-lsocket -lnsl"
4038         # When using suncc to build, the Solaris linker will mark
4039         # an executable with each instruction set encountered by
4040         # the Solaris assembler.  As our libraries contain their own
4041         # guards for processor-specific code, instead suppress
4042         # generation of the HWCAPS ELF section on Solaris x86 only.
4043         enabled_all suncc x86 &&
4044             echo "hwcap_1 = OVERRIDE;" > mapfile &&
4045             add_ldflags -Wl,-M,mapfile
4046         nm_default='nm -P -g'
4047         ;;
4048     netbsd)
4049         disable symver
4050         oss_indev_extralibs="-lossaudio"
4051         oss_outdev_extralibs="-lossaudio"
4052         enabled gcc || check_ldflags -Wl,-zmuldefs
4053         ;;
4054     openbsd|bitrig)
4055         disable symver
4056         SHFLAGS='-shared'
4057         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
4058         SLIB_INSTALL_LINKS=
4059         oss_indev_extralibs="-lossaudio"
4060         oss_outdev_extralibs="-lossaudio"
4061         ;;
4062     dragonfly)
4063         disable symver
4064         ;;
4065     freebsd)
4066         ;;
4067     bsd/os)
4068         add_extralibs -lpoll -lgnugetopt
4069         strip="strip -d"
4070         ;;
4071     darwin)
4072         enabled ppc && add_asflags -force_cpusubtype_ALL
4073         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
4074         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
4075         strip="${strip} -x"
4076         add_ldflags -Wl,-dynamic,-search_paths_first
4077         SLIBSUF=".dylib"
4078         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
4079         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
4080         objformat="macho"
4081         enabled x86_64 && objformat="macho64"
4082         enabled_any pic shared x86_64 ||
4083             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
4084         ;;
4085     mingw32*)
4086         if test $target_os = "mingw32ce"; then
4087             disable network
4088         else
4089             target_os=mingw32
4090         fi
4091         LIBTARGET=i386
4092         if enabled x86_64; then
4093             LIBTARGET="i386:x86-64"
4094         elif enabled arm; then
4095             LIBTARGET=arm-wince
4096         fi
4097         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4098         check_ldflags -Wl,--nxcompat
4099         check_ldflags -Wl,--dynamicbase
4100         enabled x86_32 && check_ldflags -Wl,--large-address-aware
4101         shlibdir_default="$bindir_default"
4102         SLIBPREF=""
4103         SLIBSUF=".dll"
4104         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4105         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4106         dlltool="${cross_prefix}dlltool"
4107         if check_cmd lib.exe -list; then
4108             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4109             if enabled x86_64; then
4110                 LIBTARGET=x64
4111             fi
4112         elif check_cmd $dlltool --version; then
4113             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
4114         fi
4115         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4116         SLIB_INSTALL_LINKS=
4117         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4118         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4119         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
4120         objformat="win32"
4121         ranlib=:
4122         enable dos_paths
4123         ;;
4124     win32|win64)
4125         disable symver
4126         if enabled shared; then
4127             # Link to the import library instead of the normal static library
4128             # for shared libs.
4129             LD_LIB='%.lib'
4130             # Cannot build both shared and static libs with MSVC or icl.
4131             disable static
4132         fi
4133         enabled x86_32 && check_ldflags -LARGEADDRESSAWARE
4134         shlibdir_default="$bindir_default"
4135         SLIBPREF=""
4136         SLIBSUF=".dll"
4137         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4138         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4139         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4140         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4141         SLIB_INSTALL_LINKS=
4142         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4143         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4144         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4145         objformat="win32"
4146         ranlib=:
4147         enable dos_paths
4148         ;;
4149     cygwin*)
4150         target_os=cygwin
4151         shlibdir_default="$bindir_default"
4152         SLIBPREF="cyg"
4153         SLIBSUF=".dll"
4154         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4155         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4156         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4157         SLIB_INSTALL_LINKS=
4158         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
4159         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
4160         objformat="win32"
4161         enable dos_paths
4162         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4163         ;;
4164     *-dos|freedos|opendos)
4165         network_extralibs="-lsocket"
4166         objformat="coff"
4167         enable dos_paths
4168         add_cppflags -U__STRICT_ANSI__
4169         ;;
4170     linux)
4171         enable dv1394
4172         enable section_data_rel_ro
4173         ;;
4174     irix*)
4175         target_os=irix
4176         ranlib="echo ignoring ranlib"
4177         ;;
4178     os/2*)
4179         strip="lxlite -CS"
4180         ln_s="cp -f"
4181         objformat="aout"
4182         add_cppflags -D_GNU_SOURCE
4183         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
4184         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4185         LIBSUF="_s.a"
4186         SLIBPREF=""
4187         SLIBSUF=".dll"
4188         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4189         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4190         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4191             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
4192             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4193             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4194             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4195             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
4196         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4197             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4198         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4199         enable dos_paths
4200         enable_weak os2threads
4201         ;;
4202     gnu/kfreebsd)
4203         add_cppflags -D_BSD_SOURCE
4204         ;;
4205     gnu)
4206         ;;
4207     qnx)
4208         add_cppflags -D_QNX_SOURCE
4209         network_extralibs="-lsocket"
4210         ;;
4211     symbian)
4212         SLIBSUF=".dll"
4213         enable dos_paths
4214         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4215         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4216         add_ldflags -Wl,--target1-abs,--no-undefined \
4217                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4218                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4219         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4220                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4221                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4222         ;;
4223     osf1)
4224         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4225         ;;
4226     minix)
4227         ;;
4228     plan9)
4229         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
4230                      -D_REENTRANT_SOURCE        \
4231                      -D_RESEARCH_SOURCE         \
4232                      -DFD_SETSIZE=96            \
4233                      -DHAVE_SOCK_OPTS
4234         add_compat strtod.o strtod=avpriv_strtod
4235         network_extralibs='-lbsd'
4236         exeobjs=compat/plan9/main.o
4237         disable ffserver
4238         cp_f='cp'
4239         ;;
4240     none)
4241         ;;
4242     *)
4243         die "Unknown OS '$target_os'."
4244         ;;
4245 esac
4246
4247 # determine libc flavour
4248
4249 probe_libc(){
4250     pfx=$1
4251     pfx_no_=${pfx%_}
4252     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4253     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4254         eval ${pfx}libc_type=uclibc
4255         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4256     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4257         eval ${pfx}libc_type=glibc
4258         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4259     # MinGW headers can be installed on Cygwin, so check for newlib first.
4260     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4261         eval ${pfx}libc_type=newlib
4262         add_${pfx}cppflags -U__STRICT_ANSI__
4263     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4264     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4265         eval ${pfx}libc_type=mingw64
4266         if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
4267             add_compat msvcrt/snprintf.o
4268             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
4269         fi
4270         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4271         eval test \$${pfx_no_}cc_type = "gcc" &&
4272             add_${pfx}cppflags -D__printf__=__gnu_printf__
4273     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4274          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4275         eval ${pfx}libc_type=mingw32
4276         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4277             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4278             die "ERROR: MinGW32 runtime version must be >= 3.15."
4279         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4280         eval test \$${pfx_no_}cc_type = "gcc" &&
4281             add_${pfx}cppflags -D__printf__=__gnu_printf__
4282     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4283         eval ${pfx}libc_type=msvcrt
4284         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4285         # 0x601 by default unless something else is set by the user.
4286         # This can easily lead to us detecting functions only present
4287         # in such new versions and producing binaries requiring windows 7.0.
4288         # Therefore explicitly set the default to XP unless the user has
4289         # set something else on the command line.
4290         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4291             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4292     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4293         eval ${pfx}libc_type=klibc
4294     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4295         eval ${pfx}libc_type=bionic
4296     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4297         eval ${pfx}libc_type=solaris
4298         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4299     fi
4300     check_${pfx}cc <<EOF
4301 #include <time.h>
4302 void *v = localtime_r;
4303 EOF
4304 test "$?" != 0 && check_${pfx}cc -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 <<EOF && add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4305 #include <time.h>
4306 void *v = localtime_r;
4307 EOF
4308
4309 }
4310
4311 probe_libc
4312 test -n "$libc_type" && enable libc_$libc_type
4313 probe_libc host_
4314 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4315
4316 case $libc_type in
4317     bionic)
4318         add_compat strtod.o strtod=avpriv_strtod
4319         ;;
4320     msvcrt)
4321         add_compat strtod.o strtod=avpriv_strtod
4322         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4323                                      _snprintf=avpriv_snprintf  \
4324                                      vsnprintf=avpriv_vsnprintf
4325         ;;
4326 esac
4327
4328 # hacks for compiler/libc/os combinations
4329
4330 if enabled_all tms470 libc_glibc; then
4331     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4332     add_cppflags -D__USER_LABEL_PREFIX__=
4333     add_cppflags -D__builtin_memset=memset
4334     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4335     add_cflags   -pds=48    # incompatible redefinition of macro
4336 fi
4337
4338 if enabled_all ccc libc_glibc; then
4339     add_ldflags -Wl,-z,now  # calls to libots crash without this
4340 fi
4341
4342 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4343     add_cppflags '-I\$(SRC_PATH)/compat/float'
4344
4345 esc(){
4346     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4347 }
4348
4349 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
4350
4351 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4352
4353 set_default libdir
4354 : ${shlibdir_default:="$libdir"}
4355
4356 set_default $PATHS_LIST
4357 set_default nm
4358
4359 # we need to build at least one lib type
4360 if ! enabled_any static shared; then
4361     cat <<EOF
4362 At least one library type must be built.
4363 Specify --enable-static to build the static libraries or --enable-shared to
4364 build the shared libraries as well. To only build the shared libraries specify
4365 --disable-static in addition to --enable-shared.
4366 EOF
4367     exit 1;
4368 fi
4369
4370 die_license_disabled() {
4371     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4372 }
4373
4374 die_license_disabled_gpl() {
4375     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
4376 }
4377
4378 die_license_disabled gpl frei0r
4379 die_license_disabled gpl libcdio
4380 die_license_disabled gpl libsmbclient
4381 die_license_disabled gpl libutvideo
4382 die_license_disabled gpl libvidstab
4383 die_license_disabled gpl libx264
4384 die_license_disabled gpl libx265
4385 die_license_disabled gpl libxavs
4386 die_license_disabled gpl libxvid
4387 die_license_disabled gpl libzvbi
4388 die_license_disabled gpl x11grab
4389
4390 die_license_disabled nonfree libaacplus
4391 die_license_disabled nonfree libfaac
4392 die_license_disabled nonfree nvenc
4393 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
4394 enabled gpl && die_license_disabled_gpl nonfree openssl
4395
4396 die_license_disabled version3 libopencore_amrnb
4397 die_license_disabled version3 libopencore_amrwb
4398 die_license_disabled version3 libsmbclient
4399 die_license_disabled version3 libvo_aacenc
4400 die_license_disabled version3 libvo_amrwbenc
4401
4402 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4403
4404 disabled optimizations || check_cflags -fomit-frame-pointer
4405
4406 enable_weak_pic() {
4407     disabled pic && return
4408     enable pic
4409     add_cppflags -DPIC
4410     case "$target_os" in
4411     mingw*|cygwin*)
4412         ;;
4413     *)
4414         add_cflags -fPIC
4415         ;;
4416     esac
4417     add_asflags  -fPIC
4418 }
4419
4420 enabled pic && enable_weak_pic
4421
4422 check_cc <<EOF || die "Symbol mangling check failed."
4423 int ff_extern;
4424 EOF
4425 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4426 extern_prefix=${sym%%ff_extern*}
4427
4428 check_cc <<EOF && enable_weak inline_asm
4429 void foo(void) { __asm__ volatile ("" ::); }
4430 EOF
4431
4432 _restrict=
4433 for restrict_keyword in restrict __restrict__ __restrict; do
4434     check_cc <<EOF && _restrict=$restrict_keyword && break
4435 void foo(char * $restrict_keyword p);
4436 EOF
4437 done
4438
4439 check_cc <<EOF && enable pragma_deprecated
4440 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4441 EOF
4442
4443 check_cc <<EOF && enable attribute_packed
4444 struct { int x; } __attribute__((packed)) x;
4445 EOF
4446
4447 check_cc <<EOF && enable attribute_may_alias
4448 union { int x; } __attribute__((may_alias)) x;
4449 EOF
4450
4451 check_cc <<EOF || die "endian test failed"
4452 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4453 EOF
4454 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4455
4456 if  [ "$cpu" = "power7" ] || [ "$cpu" = "power8" ] || enabled ppc64; then
4457     if ! enabled bigendian && enabled altivec ;then
4458         enable vsx
4459     fi
4460 fi
4461
4462 check_gas() {
4463     log "check_gas using '$as' as AS"
4464     # :vararg is used on aarch64, arm and ppc altivec
4465     check_as <<EOF || return 1
4466 .macro m n, y:vararg=0
4467 \n: .int \y
4468 .endm
4469 m x
4470 EOF
4471     # .altmacro is only used in arm asm
4472     ! enabled arm || check_as <<EOF || return 1
4473 .altmacro
4474 EOF
4475     enable gnu_as
4476     return 0
4477 }
4478
4479 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4480     nogas=:
4481     enabled_any arm aarch64 && nogas=die
4482     enabled_all ppc altivec && [ $target_os_default != aix ] && nogas=warn
4483     as_noop=-v
4484
4485     case $as_type in
4486         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4487         gcc)  gaspp_as_type=gas ;;
4488         *)    gaspp_as_type=$as_type ;;
4489     esac
4490
4491     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4492
4493     test "${as#*gas-preprocessor.pl}" != "$as" ||
4494     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- ${as:=$cc} $as_noop &&
4495         gas="${gas:=gas-preprocessor.pl} -arch $arch -as-type $gaspp_as_type -- ${as:=$cc}"
4496
4497     if ! check_gas ; then
4498         as=${gas:=$as}
4499         check_gas || \
4500             $nogas "GNU assembler not found, install/update gas-preprocessor"
4501     fi
4502
4503     check_as <<EOF && enable as_func
4504 .func test
4505 .endfunc
4506 EOF
4507 fi
4508
4509 check_inline_asm inline_asm_labels '"1:\n"'
4510
4511 check_inline_asm inline_asm_nonlocal_labels '"Label:\n"'
4512
4513 if enabled aarch64; then
4514     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4515     # internal assembler in clang 3.3 does not support this instruction
4516     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4517     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4518
4519     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4520
4521 elif enabled alpha; then
4522
4523     check_cflags -mieee
4524
4525 elif enabled arm; then
4526
4527     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
4528 float func(float a, float b){ return a+b; }
4529 EOF
4530
4531     enabled thumb && check_cflags -mthumb || check_cflags -marm
4532
4533     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4534         enable vfp_args
4535     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
4536         case "${cross_prefix:-$cc}" in
4537             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4538             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4539 __asm__ (".eabi_attribute 28, 1");
4540 int main(void) { return 0; }
4541 EOF
4542         esac
4543         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4544     fi
4545
4546     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4547     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4548     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4549     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4550     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4551     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4552     enabled setend  && check_insn setend  'setend be'
4553
4554     [ $target_os = linux ] || [ $target_os = android ] ||
4555         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4556             $ARCH_EXT_LIST_ARM
4557
4558     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4559
4560     check_as <<EOF && enable as_dn_directive
4561 ra .dn d0.i16
4562 .unreq ra
4563 EOF
4564
4565     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4566
4567 elif enabled mips; then
4568
4569     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4570
4571     # Enable minimum ISA based on selected options
4572     if enabled mips64 && (enabled mipsdspr1 || enabled mipsdspr2); then
4573         add_cflags "-mips64r2"
4574         add_asflags "-mips64r2"
4575     elif enabled mips64 && enabled mipsfpu; then
4576         add_cflags "-mips64"
4577         add_asflags "-mips64"
4578     elif enabled mipsfpu || enabled mipsdspr1 || enabled mipsdspr2; then
4579         add_cflags "-mips32r2"
4580         add_asflags "-mips32r2"
4581     fi
4582
4583     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
4584      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
4585     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
4586      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
4587     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
4588      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
4589
4590 elif enabled parisc; then
4591
4592     if enabled gcc; then
4593         case $($cc -dumpversion) in
4594             4.[3-9].*) check_cflags -fno-optimize-sibling-calls ;;
4595         esac
4596     fi
4597
4598 elif enabled ppc; then
4599
4600     enable local_aligned_8 local_aligned_16 local_aligned_32
4601
4602     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4603     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4604     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4605     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4606
4607     # AltiVec flags: The FSF version of GCC differs from the Apple version
4608     if enabled altivec; then
4609         check_cflags -maltivec -mabi=altivec &&
4610         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4611         check_cflags -faltivec
4612
4613         # check if our compiler supports Motorola AltiVec C API
4614         check_cc <<EOF || disable altivec
4615 $inc_altivec_h
4616 int main(void) {
4617     vector signed int v1 = (vector signed int) { 0 };
4618     vector signed int v2 = (vector signed int) { 1 };
4619     v1 = vec_add(v1, v2);
4620     return 0;
4621 }
4622 EOF
4623
4624         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4625     fi
4626
4627     if enabled vsx; then
4628         check_cflags -mvsx
4629     fi
4630 elif enabled x86; then
4631
4632     check_builtin rdtsc    intrin.h   "__rdtsc()"
4633     check_builtin mm_empty mmintrin.h "_mm_empty()"
4634
4635     enable local_aligned_8 local_aligned_16 local_aligned_32
4636
4637     # check whether EBP is available on x86
4638     # As 'i' is stored on the stack, this program will crash
4639     # if the base pointer is used to access it because the
4640     # base pointer is cleared in the inline assembly code.
4641     check_exec_crash <<EOF && enable ebp_available
4642 volatile int i=0;
4643 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4644 return i;
4645 EOF
4646
4647     # check whether EBX is available on x86
4648     check_inline_asm ebx_available '""::"b"(0)' &&
4649         check_inline_asm ebx_available '"":::"%ebx"'
4650
4651     # check whether xmm clobbers are supported
4652     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4653
4654     check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test, %eax"' ||
4655         check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test(%rip), %eax"'
4656
4657     # check whether binutils is new enough to compile SSSE3/MMXEXT
4658     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4659     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4660
4661     if ! disabled_any asm mmx yasm; then
4662         if check_cmd $yasmexe --version; then
4663             enabled x86_64 && yasm_extra="-m amd64"
4664             yasm_debug="-g dwarf2"
4665         elif check_cmd nasm -v; then
4666             yasmexe=nasm
4667             yasm_debug="-g -F dwarf"
4668             if enabled x86_64; then
4669                 case "$objformat" in
4670                     elf)   objformat=elf64 ;;
4671                     win32) objformat=win64 ;;
4672                 esac
4673             fi
4674         fi
4675
4676         YASMFLAGS="-f $objformat $yasm_extra"
4677         enabled pic               && append YASMFLAGS "-DPIC"
4678         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4679         case "$objformat" in
4680             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4681         esac
4682
4683         check_yasm "movbe ecx, [5]" && enable yasm ||
4684             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4685         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4686         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4687         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4688         check_yasm "CPU amdnop" || disable cpunop
4689     fi
4690
4691     case "$cpu" in
4692         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4693             disable fast_clz
4694         ;;
4695     esac
4696
4697 fi
4698
4699 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4700
4701 check_ldflags -Wl,--as-needed
4702 check_ldflags -Wl,-z,noexecstack
4703
4704 if check_func dlopen; then
4705     ldl=
4706 elif check_func dlopen -ldl; then
4707     ldl=-ldl
4708 fi
4709
4710 frei0r_filter_extralibs='$ldl'
4711 frei0r_src_filter_extralibs='$ldl'
4712 ladspa_filter_extralibs='$ldl'
4713 nvenc_encoder_extralibs='$ldl'
4714
4715 if ! disabled network; then
4716     check_func getaddrinfo $network_extralibs
4717     check_func getservbyport $network_extralibs
4718     check_func inet_aton $network_extralibs
4719
4720     check_type netdb.h "struct addrinfo"
4721     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4722     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4723     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4724     check_type poll.h "struct pollfd"
4725     check_type netinet/sctp.h "struct sctp_event_subscribe"
4726     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4727     check_type netinet/in.h "struct sockaddr_in6"
4728     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4729     check_type "sys/types.h sys/socket.h" socklen_t
4730
4731     # Prefer arpa/inet.h over winsock2
4732     if check_header arpa/inet.h ; then
4733         check_func closesocket
4734     elif check_header winsock2.h ; then
4735         check_func_headers winsock2.h closesocket -lws2 &&
4736             network_extralibs="-lws2" ||
4737         { check_func_headers winsock2.h closesocket -lws2_32 &&
4738             network_extralibs="-lws2_32"; } || disable winsock2_h network
4739         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4740
4741         check_type ws2tcpip.h socklen_t
4742         check_type ws2tcpip.h "struct addrinfo"
4743         check_type ws2tcpip.h "struct group_source_req"
4744         check_type ws2tcpip.h "struct ip_mreq_source"
4745         check_type ws2tcpip.h "struct ipv6_mreq"
4746         check_type winsock2.h "struct pollfd"
4747         check_struct winsock2.h "struct sockaddr" sa_len
4748         check_type ws2tcpip.h "struct sockaddr_in6"
4749         check_type ws2tcpip.h "struct sockaddr_storage"
4750     else
4751         disable network
4752     fi
4753 fi
4754
4755 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4756 check_builtin atomic_compare_exchange "" "int *ptr, *oldval; int newval; __atomic_compare_exchange_n(ptr, oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)"
4757 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4758 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4759 check_builtin sarestart signal.h "SA_RESTART"
4760 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4761
4762 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4763 check_func  ${malloc_prefix}memalign            && enable memalign
4764 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4765
4766 check_func  access
4767 check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4768 check_func  fcntl
4769 check_func  fork
4770 check_func  gethrtime
4771 check_func  getopt
4772 check_func  getrusage
4773 check_func  gettimeofday
4774 check_func  gmtime_r
4775 check_func  isatty
4776 check_func  localtime_r
4777 check_func  mach_absolute_time
4778 check_func  mkstemp
4779 check_func  mmap
4780 check_func  mprotect
4781 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4782 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4783 check_func  sched_getaffinity
4784 check_func  setrlimit
4785 check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE
4786 check_func  strerror_r
4787 check_func  sysconf
4788 check_func  sysctl
4789 check_func  usleep
4790
4791 check_func_headers conio.h kbhit
4792 check_func_headers io.h setmode
4793 check_func_headers lzo/lzo1x.h lzo1x_999_compress
4794 check_func_headers stdlib.h getenv
4795
4796 check_func_headers windows.h CoTaskMemFree -lole32
4797 check_func_headers windows.h GetProcessAffinityMask
4798 check_func_headers windows.h GetProcessTimes
4799 check_func_headers windows.h GetSystemTimeAsFileTime
4800 check_func_headers windows.h MapViewOfFile
4801 check_func_headers windows.h PeekNamedPipe
4802 check_func_headers windows.h SetConsoleTextAttribute
4803 check_func_headers windows.h Sleep
4804 check_func_headers windows.h VirtualAlloc
4805 check_struct windows.h "CONDITION_VARIABLE" Ptr
4806 check_func_headers glob.h glob
4807 enabled xlib &&
4808     check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
4809
4810 check_header direct.h
4811 check_header dlfcn.h
4812 check_header dxva.h
4813 check_header dxva2api.h -D_WIN32_WINNT=0x0600
4814 check_header io.h
4815 check_header libcrystalhd/libcrystalhd_if.h
4816 check_header mach/mach_time.h
4817 check_header malloc.h
4818 check_header net/udplite.h
4819 check_header poll.h
4820 check_header sys/mman.h
4821 check_header sys/param.h
4822 check_header sys/resource.h
4823 check_header sys/select.h
4824 check_header sys/time.h
4825 check_header sys/un.h
4826 check_header termios.h
4827 check_header unistd.h
4828 check_header vdpau/vdpau.h
4829 check_header vdpau/vdpau_x11.h
4830 check_header VideoDecodeAcceleration/VDADecoder.h
4831 check_header windows.h
4832 check_header X11/extensions/XvMClib.h
4833 check_header asm/types.h
4834
4835 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4836 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4837 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4838
4839 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4840
4841 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC"
4842
4843 if ! disabled w32threads && ! enabled pthreads; then
4844     check_func_headers "windows.h process.h" _beginthreadex &&
4845         enable w32threads || disable w32threads
4846 fi
4847
4848 # check for some common methods of building with pthread support
4849 # do this before the optional library checks as some of them require pthreads
4850 if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
4851     enable pthreads
4852     if check_func pthread_join -pthread && check_func pthread_create -pthread; then
4853         add_cflags -pthread
4854         add_extralibs -pthread
4855     elif check_func pthread_join -pthreads && check_func pthread_create -pthreads; then
4856         add_cflags -pthreads
4857         add_extralibs -pthreads
4858     elif check_func pthread_join -ldl -pthread && check_func pthread_create -ldl -pthread; then
4859         add_cflags -ldl -pthread
4860         add_extralibs -ldl -pthread
4861     elif check_func pthread_join -lpthreadGC2 && check_func pthread_create -lpthreadGC2; then
4862         add_extralibs -lpthreadGC2
4863     elif check_lib pthread.h pthread_join -lpthread && check_lib pthread.h pthread_create -lpthread; then
4864         :
4865     elif ! check_func pthread_join && ! check_func pthread_create; then
4866         disable pthreads
4867     fi
4868     check_code cc "pthread.h" "static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER" || disable pthreads
4869 fi
4870
4871
4872 if enabled pthreads; then
4873   check_func pthread_cancel
4874 fi
4875
4876 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4877 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib