Merge commit '9127ac5ebc941d5e54828a91e5072c876be8ec42'
[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:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-outdevs           show all available output devices
77   --list-filters           show all available filters
78
79 Standard options:
80   --logfile=FILE           log tests and output to FILE [ffbuild/config.log]
81   --disable-logging        do not log configure debug information
82   --fatal-warnings         fail if any configure warning is generated
83   --prefix=PREFIX          install in PREFIX [$prefix_default]
84   --bindir=DIR             install binaries in DIR [PREFIX/bin]
85   --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]
86   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]
87   --libdir=DIR             install libs in DIR [PREFIX/lib]
88   --shlibdir=DIR           install shared libs in DIR [LIBDIR]
89   --incdir=DIR             install includes in DIR [PREFIX/include]
90   --mandir=DIR             install man page in DIR [PREFIX/share/man]
91   --pkgconfigdir=DIR       install pkg-config files in DIR [LIBDIR/pkgconfig]
92   --enable-rpath           use rpath to allow installing libraries in paths
93                            not part of the dynamic linker search path
94                            use rpath when linking programs (USE WITH CARE)
95   --install-name-dir=DIR   Darwin directory name for installed targets
96
97 Licensing options:
98   --enable-gpl             allow use of GPL code, the resulting libs
99                            and binaries will be under GPL [no]
100   --enable-version3        upgrade (L)GPL to version 3 [no]
101   --enable-nonfree         allow use of nonfree code, the resulting libs
102                            and binaries will be unredistributable [no]
103
104 Configuration options:
105   --disable-static         do not build static libraries [no]
106   --enable-shared          build shared libraries [no]
107   --enable-small           optimize for size instead of speed
108   --disable-runtime-cpudetect disable detecting CPU capabilities at runtime (smaller binary)
109   --enable-gray            enable full grayscale support (slower color)
110   --disable-swscale-alpha  disable alpha channel support in swscale
111   --disable-all            disable building components, libraries and programs
112   --disable-autodetect     disable automatically detected external libraries [no]
113
114 Program options:
115   --disable-programs       do not build command line programs
116   --disable-ffmpeg         disable ffmpeg build
117   --disable-ffplay         disable ffplay build
118   --disable-ffprobe        disable ffprobe build
119   --disable-ffserver       disable ffserver build
120
121 Documentation options:
122   --disable-doc            do not build documentation
123   --disable-htmlpages      do not build HTML documentation pages
124   --disable-manpages       do not build man documentation pages
125   --disable-podpages       do not build POD documentation pages
126   --disable-txtpages       do not build text documentation pages
127
128 Component options:
129   --disable-avdevice       disable libavdevice build
130   --disable-avcodec        disable libavcodec build
131   --disable-avformat       disable libavformat build
132   --disable-swresample     disable libswresample build
133   --disable-swscale        disable libswscale build
134   --disable-postproc       disable libpostproc build
135   --disable-avfilter       disable libavfilter build
136   --enable-avresample      enable libavresample build [no]
137   --disable-pthreads       disable pthreads [autodetect]
138   --disable-w32threads     disable Win32 threads [autodetect]
139   --disable-os2threads     disable OS/2 threads [autodetect]
140   --disable-network        disable network support [no]
141   --disable-dct            disable DCT code
142   --disable-dwt            disable DWT code
143   --disable-error-resilience disable error resilience code
144   --disable-lsp            disable LSP code
145   --disable-lzo            disable LZO decoder code
146   --disable-mdct           disable MDCT code
147   --disable-rdft           disable RDFT code
148   --disable-fft            disable FFT code
149   --disable-faan           disable floating point AAN (I)DCT code
150   --disable-pixelutils     disable pixel utils in libavutil
151
152 Individual component options:
153   --disable-everything     disable all components listed below
154   --disable-encoder=NAME   disable encoder NAME
155   --enable-encoder=NAME    enable encoder NAME
156   --disable-encoders       disable all encoders
157   --disable-decoder=NAME   disable decoder NAME
158   --enable-decoder=NAME    enable decoder NAME
159   --disable-decoders       disable all decoders
160   --disable-hwaccel=NAME   disable hwaccel NAME
161   --enable-hwaccel=NAME    enable hwaccel NAME
162   --disable-hwaccels       disable all hwaccels
163   --disable-muxer=NAME     disable muxer NAME
164   --enable-muxer=NAME      enable muxer NAME
165   --disable-muxers         disable all muxers
166   --disable-demuxer=NAME   disable demuxer NAME
167   --enable-demuxer=NAME    enable demuxer NAME
168   --disable-demuxers       disable all demuxers
169   --enable-parser=NAME     enable parser NAME
170   --disable-parser=NAME    disable parser NAME
171   --disable-parsers        disable all parsers
172   --enable-bsf=NAME        enable bitstream filter NAME
173   --disable-bsf=NAME       disable bitstream filter NAME
174   --disable-bsfs           disable all bitstream filters
175   --enable-protocol=NAME   enable protocol NAME
176   --disable-protocol=NAME  disable protocol NAME
177   --disable-protocols      disable all protocols
178   --enable-indev=NAME      enable input device NAME
179   --disable-indev=NAME     disable input device NAME
180   --disable-indevs         disable input devices
181   --enable-outdev=NAME     enable output device NAME
182   --disable-outdev=NAME    disable output device NAME
183   --disable-outdevs        disable output devices
184   --disable-devices        disable all devices
185   --enable-filter=NAME     enable filter NAME
186   --disable-filter=NAME    disable filter NAME
187   --disable-filters        disable all filters
188   --disable-v4l2_m2m       disable V4L2 mem2mem code [autodetect]
189
190 External library support:
191
192   Using any of the following switches will allow FFmpeg to link to the
193   corresponding external library. All the components depending on that library
194   will become enabled, if all their other dependencies are met and they are not
195   explicitly disabled. E.g. --enable-libwavpack will enable linking to
196   libwavpack and allow the libwavpack encoder to be built, unless it is
197   specifically disabled with --disable-encoder=libwavpack.
198
199   Note that only the system libraries are auto-detected. All the other external
200   libraries must be explicitly enabled.
201
202   Also note that the following help text describes the purpose of the libraries
203   themselves, not all their features will necessarily be usable by FFmpeg.
204
205   --disable-alsa           disable ALSA support [autodetect]
206   --disable-appkit         disable Apple AppKit framework [autodetect]
207   --disable-avfoundation   disable Apple AVFoundation framework [autodetect]
208   --enable-avisynth        enable reading of AviSynth script files [no]
209   --disable-bzlib          disable bzlib [autodetect]
210   --disable-coreimage      disable Apple CoreImage framework [autodetect]
211   --enable-chromaprint     enable audio fingerprinting with chromaprint [no]
212   --enable-frei0r          enable frei0r video filtering [no]
213   --enable-gcrypt          enable gcrypt, needed for rtmp(t)e support
214                            if openssl, librtmp or gmp is not used [no]
215   --enable-gmp             enable gmp, needed for rtmp(t)e support
216                            if openssl or librtmp is not used [no]
217   --enable-gnutls          enable gnutls, needed for https support
218                            if openssl is not used [no]
219   --disable-iconv          disable iconv [autodetect]
220   --disable-jack           disable libjack support [autodetect]
221   --enable-jni             enable JNI support [no]
222   --enable-ladspa          enable LADSPA audio filtering [no]
223   --enable-libass          enable libass subtitles rendering,
224                            needed for subtitles and ass filter [no]
225   --enable-libbluray       enable BluRay reading using libbluray [no]
226   --enable-libbs2b         enable bs2b DSP library [no]
227   --enable-libcaca         enable textual display using libcaca [no]
228   --enable-libcelt         enable CELT decoding via libcelt [no]
229   --enable-libcdio         enable audio CD grabbing with libcdio [no]
230   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
231                            and libraw1394 [no]
232   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
233   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
234   --enable-libfontconfig   enable libfontconfig, useful for drawtext filter [no]
235   --enable-libfreetype     enable libfreetype, needed for drawtext filter [no]
236   --enable-libfribidi      enable libfribidi, improves drawtext filter [no]
237   --enable-libgme          enable Game Music Emu via libgme [no]
238   --enable-libgsm          enable GSM de/encoding via libgsm [no]
239   --enable-libiec61883     enable iec61883 via libiec61883 [no]
240   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
241   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
242   --enable-libmodplug      enable ModPlug via libmodplug [no]
243   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
244   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
245   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
246   --enable-libopencv       enable video filtering via libopencv [no]
247   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
248   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
249   --enable-libopenmpt      enable decoding tracked files via libopenmpt [no]
250   --enable-libopus         enable Opus de/encoding via libopus [no]
251   --enable-libpulse        enable Pulseaudio input via libpulse [no]
252   --enable-librsvg         enable SVG rasterization via librsvg [no]
253   --enable-librubberband   enable rubberband needed for rubberband filter [no]
254   --enable-librtmp         enable RTMP[E] support via librtmp [no]
255   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
256   --enable-libsmbclient    enable Samba protocol via libsmbclient [no]
257   --enable-libsnappy       enable Snappy compression, needed for hap encoding [no]
258   --enable-libsoxr         enable Include libsoxr resampling [no]
259   --enable-libspeex        enable Speex de/encoding via libspeex [no]
260   --enable-libssh          enable SFTP protocol via libssh [no]
261   --enable-libtesseract    enable Tesseract, needed for ocr filter [no]
262   --enable-libtheora       enable Theora encoding via libtheora [no]
263   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
264   --enable-libv4l2         enable libv4l2/v4l-utils [no]
265   --enable-libvidstab      enable video stabilization using vid.stab [no]
266   --enable-libvmaf         enable vmaf filter via libvmaf [no]
267   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
268   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
269                            native implementation exists [no]
270   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
271   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
272   --enable-libwebp         enable WebP encoding via libwebp [no]
273   --enable-libx264         enable H.264 encoding via x264 [no]
274   --enable-libx265         enable HEVC encoding via x265 [no]
275   --enable-libxavs         enable AVS encoding via xavs [no]
276   --enable-libxcb          enable X11 grabbing using XCB [autodetect]
277   --enable-libxcb-shm      enable X11 grabbing shm communication [autodetect]
278   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [autodetect]
279   --enable-libxcb-shape    enable X11 grabbing shape rendering [autodetect]
280   --enable-libxvid         enable Xvid encoding via xvidcore,
281                            native MPEG-4/Xvid encoder exists [no]
282   --enable-libxml2         enable XML parsing using the C library libxml2 [no]
283   --enable-libzimg         enable z.lib, needed for zscale filter [no]
284   --enable-libzmq          enable message passing via libzmq [no]
285   --enable-libzvbi         enable teletext support via libzvbi [no]
286   --disable-lzma           disable lzma [autodetect]
287   --enable-decklink        enable Blackmagic DeckLink I/O support [no]
288   --enable-libndi_newtek   enable Newteck NDI I/O support [no]
289   --enable-mediacodec      enable Android MediaCodec support [no]
290   --enable-libmysofa       enable libmysofa, needed for sofalizer filter [no]
291   --enable-openal          enable OpenAL 1.1 capture support [no]
292   --enable-opencl          enable OpenCL code
293   --enable-opengl          enable OpenGL rendering [no]
294   --enable-openssl         enable openssl, needed for https support
295                            if gnutls is not used [no]
296   --disable-sndio          disable sndio support [autodetect]
297   --disable-schannel       disable SChannel SSP, needed for TLS support on
298                            Windows if openssl and gnutls are not used [autodetect]
299   --disable-sdl2           disable sdl2 [autodetect]
300   --disable-securetransport disable Secure Transport, needed for TLS support
301                            on OSX if openssl and gnutls are not used [autodetect]
302   --disable-xlib           disable xlib [autodetect]
303   --disable-zlib           disable zlib [autodetect]
304
305   The following libraries provide various hardware acceleration features:
306   --disable-audiotoolbox   disable Apple AudioToolbox code [autodetect]
307   --disable-cuda           disable dynamically linked Nvidia CUDA code [autodetect]
308   --enable-cuda-sdk        enable CUDA features that require the CUDA SDK [no]
309   --disable-cuvid          disable Nvidia CUVID support [autodetect]
310   --disable-d3d11va        disable Microsoft Direct3D 11 video acceleration code [autodetect]
311   --disable-dxva2          disable Microsoft DirectX 9 video acceleration code [autodetect]
312   --enable-libdrm          enable DRM code (Linux) [no]
313   --enable-libmfx          enable Intel MediaSDK (AKA Quick Sync Video) code via libmfx [no]
314   --enable-libnpp          enable Nvidia Performance Primitives-based code [no]
315   --enable-mmal            enable Broadcom Multi-Media Abstraction Layer (Raspberry Pi) via MMAL [no]
316   --disable-nvenc          disable Nvidia video encoding code [autodetect]
317   --enable-omx             enable OpenMAX IL code [no]
318   --enable-omx-rpi         enable OpenMAX IL code for Raspberry Pi [no]
319   --disable-vaapi          disable Video Acceleration API (mainly Unix/Intel) code [autodetect]
320   --disable-vda            disable Apple Video Decode Acceleration code [autodetect]
321   --disable-vdpau          disable Nvidia Video Decode and Presentation API for Unix code [autodetect]
322   --disable-videotoolbox   disable VideoToolbox code [autodetect]
323
324 Toolchain options:
325   --arch=ARCH              select architecture [$arch]
326   --cpu=CPU                select the minimum required CPU (affects
327                            instruction selection, may crash on older CPUs)
328   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
329   --progs-suffix=SUFFIX    program name suffix []
330   --enable-cross-compile   assume a cross-compiler is used
331   --sysroot=PATH           root of cross-build tree
332   --sysinclude=PATH        location of cross-build system headers
333   --target-os=OS           compiler targets OS [$target_os]
334   --target-exec=CMD        command to run executables on target
335   --target-path=DIR        path to view of build directory on target
336   --target-samples=DIR     path to samples directory on target
337   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
338   --toolchain=NAME         set tool defaults according to NAME
339   --nm=NM                  use nm tool NM [$nm_default]
340   --ar=AR                  use archive tool AR [$ar_default]
341   --as=AS                  use assembler AS [$as_default]
342   --ln_s=LN_S              use symbolic link tool LN_S [$ln_s_default]
343   --strip=STRIP            use strip tool STRIP [$strip_default]
344   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
345   --x86asmexe=EXE          use nasm-compatible assembler EXE [$x86asmexe_default]
346   --cc=CC                  use C compiler CC [$cc_default]
347   --cxx=CXX                use C compiler CXX [$cxx_default]
348   --objcc=OCC              use ObjC compiler OCC [$cc_default]
349   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
350   --nvcc=NVCC              use Nvidia CUDA compiler NVCC [$nvcc_default]
351   --ld=LD                  use linker LD [$ld_default]
352   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
353   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
354   --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
355   --doxygen=DOXYGEN        use DOXYGEN to generate API doc [$doxygen_default]
356   --host-cc=HOSTCC         use host C compiler HOSTCC
357   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
358   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
359   --host-ld=HOSTLD         use host linker HOSTLD
360   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
361   --host-libs=HLIBS        use libs HLIBS when linking for host
362   --host-os=OS             compiler host OS [$target_os]
363   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
364   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
365   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
366   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
367   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
368   --extra-ldlibflags=ELDFLAGS add ELDFLAGS to LDLIBFLAGS [$LDLIBFLAGS]
369   --extra-libs=ELIBS       add ELIBS [$ELIBS]
370   --extra-version=STRING   version string suffix []
371   --optflags=OPTFLAGS      override optimization-related compiler flags
372   --nvccflags=NVCCFLAGS    override nvcc flags [$nvccflags_default]
373   --build-suffix=SUFFIX    library name suffix []
374   --enable-pic             build position-independent code
375   --enable-thumb           compile for Thumb instruction set
376   --enable-lto             use link-time optimization
377   --env="ENV=override"     override the environment variables
378
379 Advanced options (experts only):
380   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
381   --custom-allocator=NAME  use a supported custom allocator
382   --disable-symver         disable symbol versioning
383   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
384   --disable-safe-bitstream-reader
385                            disable buffer boundary checking in bitreaders
386                            (faster, but may crash)
387   --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
388
389 Optimization options (experts only):
390   --disable-asm            disable all assembly optimizations
391   --disable-altivec        disable AltiVec optimizations
392   --disable-vsx            disable VSX optimizations
393   --disable-power8         disable POWER8 optimizations
394   --disable-amd3dnow       disable 3DNow! optimizations
395   --disable-amd3dnowext    disable 3DNow! extended optimizations
396   --disable-mmx            disable MMX optimizations
397   --disable-mmxext         disable MMXEXT optimizations
398   --disable-sse            disable SSE optimizations
399   --disable-sse2           disable SSE2 optimizations
400   --disable-sse3           disable SSE3 optimizations
401   --disable-ssse3          disable SSSE3 optimizations
402   --disable-sse4           disable SSE4 optimizations
403   --disable-sse42          disable SSE4.2 optimizations
404   --disable-avx            disable AVX optimizations
405   --disable-xop            disable XOP optimizations
406   --disable-fma3           disable FMA3 optimizations
407   --disable-fma4           disable FMA4 optimizations
408   --disable-avx2           disable AVX2 optimizations
409   --disable-aesni          disable AESNI optimizations
410   --disable-armv5te        disable armv5te optimizations
411   --disable-armv6          disable armv6 optimizations
412   --disable-armv6t2        disable armv6t2 optimizations
413   --disable-vfp            disable VFP optimizations
414   --disable-neon           disable NEON optimizations
415   --disable-inline-asm     disable use of inline assembly
416   --disable-x86asm         disable use of standalone x86 assembly
417   --disable-mipsdsp        disable MIPS DSP ASE R1 optimizations
418   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
419   --disable-msa            disable MSA optimizations
420   --disable-mipsfpu        disable floating point MIPS optimizations
421   --disable-mmi            disable Loongson SIMD optimizations
422   --disable-fast-unaligned consider unaligned accesses slow
423
424 Developer options (useful when working on FFmpeg itself):
425   --disable-debug          disable debugging symbols
426   --enable-debug=LEVEL     set the debug level [$debuglevel]
427   --disable-optimizations  disable compiler optimizations
428   --enable-extra-warnings  enable more compiler warnings
429   --disable-stripping      disable stripping of executables and shared libraries
430   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
431                            2 causes a slowdown at runtime.
432   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
433   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
434                            leaks and errors, using the specified valgrind binary.
435                            Cannot be combined with --target-exec
436   --enable-ftrapv          Trap arithmetic overflows
437   --samples=PATH           location of test samples for FATE, if not set use
438                            \$FATE_SAMPLES at make invocation time.
439   --enable-neon-clobber-test check NEON registers for clobbering (should be
440                            used only for debugging purposes)
441   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
442                            should be used only for debugging purposes)
443   --enable-random          randomly enable/disable components
444   --disable-random
445   --enable-random=LIST     randomly enable/disable specific components or
446   --disable-random=LIST    component groups. LIST is a comma-separated list
447                            of NAME[:PROB] entries where NAME is a component
448                            (group) and PROB the probability associated with
449                            NAME (default 0.5).
450   --random-seed=VALUE      seed value for --enable/disable-random
451   --disable-valgrind-backtrace do not print a backtrace under Valgrind
452                            (only applies to --disable-optimizations builds)
453   --enable-osfuzz          Enable building fuzzer tool
454   --libfuzzer=PATH         path to libfuzzer
455   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
456                            in the name) of tests whose result is ignored
457   --enable-linux-perf      enable Linux Performance Monitor API
458
459 NOTE: Object files are built at the place where configure is launched.
460 EOF
461   exit 0
462 }
463
464 quotes='""'
465 if test -t 1 && which tput >/dev/null 2>&1; then
466     ncolors=$(tput colors)
467     if test -n "$ncolors" && test $ncolors -ge 8; then
468         bold_color=$(tput bold)
469         warn_color=$(tput setaf 3)
470         error_color=$(tput setaf 1)
471         reset_color=$(tput sgr0)
472     fi
473     # 72 used instead of 80 since that's the default of pr
474     ncols=$(tput cols)
475 fi
476 : ${ncols:=72}
477
478 log(){
479     echo "$@" >> $logfile
480 }
481
482 log_file(){
483     log BEGIN $1
484     pr -n -t $1 >> $logfile
485     log END $1
486 }
487
488 warn(){
489     log "WARNING: $*"
490     WARNINGS="${WARNINGS}WARNING: $*\n"
491 }
492
493 die(){
494     log "$@"
495     echo "$error_color$bold_color$@$reset_color"
496     cat <<EOF
497
498 If you think configure made a mistake, make sure you are using the latest
499 version from Git.  If the latest version fails, report the problem to the
500 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
501 EOF
502     if disabled logging; then
503         cat <<EOF
504 Rerun configure with logging enabled (do not use --disable-logging), and
505 include the log this produces with your report.
506 EOF
507     else
508         cat <<EOF
509 Include the log file "$logfile" produced by configure as this will help
510 solve the problem.
511 EOF
512     fi
513     exit 1
514 }
515
516 # Avoid locale weirdness, besides we really just want to translate ASCII.
517 toupper(){
518     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
519 }
520
521 tolower(){
522     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
523 }
524
525 c_escape(){
526     echo "$*" | sed 's/["\\]/\\\0/g'
527 }
528
529 sh_quote(){
530     v=$(echo "$1" | sed "s/'/'\\\\''/g")
531     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
532     echo "$v"
533 }
534
535 cleanws(){
536     echo "$@" | sed 's/^ *//;s/[[:space:]][[:space:]]*/ /g;s/ *$//'
537 }
538
539 filter(){
540     pat=$1
541     shift
542     for v; do
543         eval "case $v in $pat) printf '%s ' $v ;; esac"
544     done
545 }
546
547 filter_out(){
548     pat=$1
549     shift
550     for v; do
551         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
552     done
553 }
554
555 map(){
556     m=$1
557     shift
558     for v; do eval $m; done
559 }
560
561 add_suffix(){
562     suffix=$1
563     shift
564     for v; do echo ${v}${suffix}; done
565 }
566
567 set_all(){
568     value=$1
569     shift
570     for var in $*; do
571         eval $var=$value
572     done
573 }
574
575 set_weak(){
576     value=$1
577     shift
578     for var; do
579         eval : \${$var:=$value}
580     done
581 }
582
583 sanitize_var_name(){
584     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
585 }
586
587 set_safe(){
588     var=$1
589     shift
590     eval $(sanitize_var_name "$var")='$*'
591 }
592
593 get_safe(){
594     eval echo \$$(sanitize_var_name "$1")
595 }
596
597 pushvar(){
598     for pvar in $*; do
599         eval level=\${${pvar}_level:=0}
600         eval ${pvar}_${level}="\$$pvar"
601         eval ${pvar}_level=$(($level+1))
602     done
603 }
604
605 popvar(){
606     for pvar in $*; do
607         eval level=\${${pvar}_level:-0}
608         test $level = 0 && continue
609         eval level=$(($level-1))
610         eval $pvar="\${${pvar}_${level}}"
611         eval ${pvar}_level=$level
612         eval unset ${pvar}_${level}
613     done
614 }
615
616 request(){
617     for var in $*; do
618         eval ${var}_requested=yes
619         eval $var=
620     done
621 }
622
623 enable(){
624     set_all yes $*
625 }
626
627 disable(){
628     set_all no $*
629 }
630
631 enable_weak(){
632     set_weak yes $*
633 }
634
635 disable_weak(){
636     set_weak no $*
637 }
638
639 enable_safe(){
640     for var; do
641         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
642     done
643 }
644
645 disable_safe(){
646     for var; do
647         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
648     done
649 }
650
651 do_enable_deep(){
652     for var; do
653         enabled $var && continue
654         eval sel="\$${var}_select"
655         eval sgs="\$${var}_suggest"
656         pushvar var sgs
657         enable_deep $sel
658         popvar sgs
659         enable_deep_weak $sgs
660         popvar var
661     done
662 }
663
664 enable_deep(){
665     do_enable_deep $*
666     enable $*
667 }
668
669 enable_deep_weak(){
670     for var; do
671         disabled $var && continue
672         pushvar var
673         do_enable_deep $var
674         popvar var
675         enable_weak $var
676     done
677 }
678
679 requested(){
680     test "${1#!}" = "$1" && op='=' || op=!=
681     eval test "x\$${1#!}_requested" $op "xyes"
682 }
683
684 enabled(){
685     test "${1#!}" = "$1" && op='=' || op=!=
686     eval test "x\$${1#!}" $op "xyes"
687 }
688
689 disabled(){
690     test "${1#!}" = "$1" && op='=' || op=!=
691     eval test "x\$${1#!}" $op "xno"
692 }
693
694 enabled_all(){
695     for opt; do
696         enabled $opt || return 1
697     done
698 }
699
700 disabled_all(){
701     for opt; do
702         disabled $opt || return 1
703     done
704 }
705
706 enabled_any(){
707     for opt; do
708         enabled $opt && return 0
709     done
710 }
711
712 disabled_any(){
713     for opt; do
714         disabled $opt && return 0
715     done
716     return 1
717 }
718
719 set_default(){
720     for opt; do
721         eval : \${$opt:=\$${opt}_default}
722     done
723 }
724
725 is_in(){
726     value=$1
727     shift
728     for var in $*; do
729         [ $var = $value ] && return 0
730     done
731     return 1
732 }
733
734 do_check_deps(){
735     for cfg; do
736         cfg="${cfg#!}"
737         enabled ${cfg}_checking && die "Circular dependency for $cfg."
738         disabled ${cfg}_checking && continue
739         enable ${cfg}_checking
740         append allopts $cfg
741
742         eval dep_all="\$${cfg}_deps"
743         eval dep_any="\$${cfg}_deps_any"
744         eval dep_sel="\$${cfg}_select"
745         eval dep_sgs="\$${cfg}_suggest"
746         eval dep_ifa="\$${cfg}_if"
747         eval dep_ifn="\$${cfg}_if_any"
748
749         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
750         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
751         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
752
753         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
754         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
755         enabled_all  $dep_all || { disable $cfg && requested $cfg && die "ERROR: $cfg requested, but not all dependencies are satisfied: $dep_all"; }
756         enabled_any  $dep_any || { disable $cfg && requested $cfg && die "ERROR: $cfg requested, but not any dependency is satisfied: $dep_any"; }
757         disabled_any $dep_sel && { disable $cfg && requested $cfg && die "ERROR: $cfg requested, but some selected dependency is unsatisfied: $dep_sel"; }
758
759         if enabled $cfg; then
760             enable_deep $dep_sel
761             enable_deep_weak $dep_sgs
762         fi
763
764         disable ${cfg}_checking
765     done
766 }
767
768 check_deps(){
769     unset allopts
770
771     do_check_deps "$@"
772
773     for cfg in $allopts; do
774         enabled $cfg || continue
775         eval dep_extralibs="\$${cfg}_extralibs"
776         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
777     done
778 }
779
780 print_config(){
781     pfx=$1
782     files=$2
783     shift 2
784     map 'eval echo "$v \${$v:-no}"' "$@" |
785     awk "BEGIN { split(\"$files\", files) }
786         {
787             c = \"$pfx\" toupper(\$1);
788             v = \$2;
789             sub(/yes/, 1, v);
790             sub(/no/,  0, v);
791             for (f in files) {
792                 file = files[f];
793                 if (file ~ /\\.h\$/) {
794                     printf(\"#define %s %d\\n\", c, v) >>file;
795                 } else if (file ~ /\\.asm\$/) {
796                     printf(\"%%define %s %d\\n\", c, v) >>file;
797                 } else if (file ~ /\\.mak\$/) {
798                     n = -v ? \"\" : \"!\";
799                     printf(\"%s%s=yes\\n\", n, c) >>file;
800                 } else if (file ~ /\\.texi\$/) {
801                     pre = -v ? \"\" : \"@c \";
802                     yesno = \$2;
803                     c2 = tolower(c);
804                     gsub(/_/, \"-\", c2);
805                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
806                 }
807             }
808         }"
809 }
810
811 print_enabled(){
812     suf=$1
813     shift
814     for v; do
815         enabled $v && printf "%s\n" ${v%$suf}
816     done
817 }
818
819 append(){
820     var=$1
821     shift
822     eval "$var=\"\$$var $*\""
823 }
824
825 prepend(){
826     var=$1
827     shift
828     eval "$var=\"$* \$$var\""
829 }
830
831 unique(){
832     var=$1
833     uniq_list=""
834     for tok in $(eval echo \$$var); do
835         uniq_list="$(filter_out $tok $uniq_list) $tok"
836     done
837     eval "$var=\"${uniq_list}\""
838 }
839
840 add_cppflags(){
841     append CPPFLAGS "$@"
842 }
843
844 add_cflags(){
845     append CFLAGS $($cflags_filter "$@")
846 }
847
848 add_cflags_headers(){
849     append CFLAGS_HEADERS $($cflags_filter "$@")
850 }
851
852 add_cxxflags(){
853     append CXXFLAGS $($cflags_filter "$@")
854 }
855
856 add_asflags(){
857     append ASFLAGS $($asflags_filter "$@")
858 }
859
860 add_objcflags(){
861     append OBJCFLAGS $($objcflags_filter "$@")
862 }
863
864 add_ldflags(){
865     append LDFLAGS $($ldflags_filter "$@")
866 }
867
868 add_ldexeflags(){
869     append LDEXEFLAGS $($ldflags_filter "$@")
870 }
871
872 add_ldlibflags(){
873     append LDLIBFLAGS $($ldflags_filter "$@")
874 }
875
876 add_stripflags(){
877     append ASMSTRIPFLAGS "$@"
878 }
879
880 add_extralibs(){
881     prepend extralibs $($ldflags_filter "$@")
882 }
883
884 add_host_cppflags(){
885     append host_cppflags "$@"
886 }
887
888 add_host_cflags(){
889     append host_cflags $($host_cflags_filter "$@")
890 }
891
892 add_host_ldflags(){
893     append host_ldflags $($host_ldflags_filter "$@")
894 }
895
896 add_compat(){
897     append compat_objs $1
898     shift
899     map 'add_cppflags -D$v' "$@"
900 }
901
902 check_cmd(){
903     log "$@"
904     "$@" >> $logfile 2>&1
905 }
906
907 check_stat(){
908     log check_stat "$@"
909     stat "$1" >> $logfile 2>&1
910 }
911
912 cc_o(){
913     eval printf '%s\\n' $CC_O
914 }
915
916 cc_e(){
917     eval printf '%s\\n' $CC_E
918 }
919
920 check_cc(){
921     log check_cc "$@"
922     cat > $TMPC
923     log_file $TMPC
924     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
925 }
926
927 check_cxx(){
928     log check_cxx "$@"
929     cat > $TMPCPP
930     log_file $TMPCPP
931     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
932 }
933
934 check_objcc(){
935     log check_objcc "$@"
936     cat > $TMPM
937     log_file $TMPM
938     check_cmd $objcc -Werror=missing-prototypes $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPM
939 }
940
941 check_cpp(){
942     log check_cpp "$@"
943     cat > $TMPC
944     log_file $TMPC
945     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
946 }
947
948 as_o(){
949     eval printf '%s\\n' $AS_O
950 }
951
952 check_as(){
953     log check_as "$@"
954     cat > $TMPS
955     log_file $TMPS
956     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
957 }
958
959 check_inline_asm(){
960     log check_inline_asm "$@"
961     name="$1"
962     code="$2"
963     shift 2
964     disable $name
965     check_cc "$@" <<EOF && enable $name
966 void foo(void){ __asm__ volatile($code); }
967 EOF
968 }
969
970 check_inline_asm_flags(){
971     log check_inline_asm_flags "$@"
972     name="$1"
973     code="$2"
974     flags=''
975     shift 2
976     while [ "$1" != "" ]; do
977       append flags $1
978       shift
979     done;
980     disable $name
981     cat > $TMPC <<EOF
982 void foo(void){ __asm__ volatile($code); }
983 EOF
984     log_file $TMPC
985     check_cmd $cc $CPPFLAGS $CFLAGS $flags "$@" $CC_C $(cc_o $TMPO) $TMPC &&
986     enable $name && add_cflags $flags && add_asflags $flags && add_ldflags $flags
987 }
988
989 check_insn(){
990     log check_insn "$@"
991     check_inline_asm ${1}_inline "\"$2\""
992     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
993 }
994
995 check_x86asm(){
996     log check_x86asm "$@"
997     echo "$1" > $TMPS
998     log_file $TMPS
999     shift 1
1000     check_cmd $x86asmexe $X86ASMFLAGS -Werror "$@" -o $TMPO $TMPS
1001 }
1002
1003 ld_o(){
1004     eval printf '%s\\n' $LD_O
1005 }
1006
1007 check_ld(){
1008     log check_ld "$@"
1009     type=$1
1010     shift 1
1011     flags=$(filter_out '-l*|*.so' $@)
1012     libs=$(filter '-l*|*.so' $@)
1013     check_$type $($cflags_filter $flags) || return
1014     flags=$($ldflags_filter $flags)
1015     libs=$($ldflags_filter $libs)
1016     check_cmd $ld $LDFLAGS $LDEXEFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
1017 }
1018
1019 print_include(){
1020     hdr=$1
1021     test "${hdr%.h}" = "${hdr}" &&
1022         echo "#include $hdr"    ||
1023         echo "#include <$hdr>"
1024 }
1025
1026 check_code(){
1027     log check_code "$@"
1028     check=$1
1029     headers=$2
1030     code=$3
1031     shift 3
1032     {
1033         for hdr in $headers; do
1034             print_include $hdr
1035         done
1036         echo "int main(void) { $code; return 0; }"
1037     } | check_$check "$@"
1038 }
1039
1040 check_cppflags(){
1041     log check_cppflags "$@"
1042     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
1043 #include <stdlib.h>
1044 EOF
1045 }
1046
1047 test_cflags(){
1048     log test_cflags "$@"
1049     set -- $($cflags_filter "$@")
1050     check_cc "$@" <<EOF
1051 int x;
1052 EOF
1053 }
1054
1055 check_cflags(){
1056     log check_cflags "$@"
1057     test_cflags "$@" && add_cflags "$@"
1058 }
1059
1060 check_cxxflags(){
1061     log check_cxxflags "$@"
1062     set -- $($cflags_filter "$@")
1063     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
1064 int x;
1065 EOF
1066 }
1067
1068 test_objcflags(){
1069     log test_objcflags "$@"
1070     set -- $($objcflags_filter "$@")
1071     check_objcc "$@" <<EOF
1072 int x;
1073 EOF
1074 }
1075
1076 check_objcflags(){
1077     log check_objcflags "$@"
1078     test_objcflags "$@" && add_objcflags "$@"
1079 }
1080
1081 test_ldflags(){
1082     log test_ldflags "$@"
1083     check_ld "cc" "$@" <<EOF
1084 int main(void){ return 0; }
1085 EOF
1086 }
1087
1088 check_ldflags(){
1089     log check_ldflags "$@"
1090     test_ldflags "$@" && add_ldflags "$@"
1091 }
1092
1093 test_stripflags(){
1094     log test_stripflags "$@"
1095     # call check_cc to get a fresh TMPO
1096     check_cc <<EOF
1097 int main(void) { return 0; }
1098 EOF
1099     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
1100 }
1101
1102 check_stripflags(){
1103     log check_stripflags "$@"
1104     test_stripflags "$@" && add_stripflags "$@"
1105 }
1106
1107 check_header(){
1108     log check_header "$@"
1109     header=$1
1110     shift
1111     disable_safe $header
1112     check_cpp "$@" <<EOF && enable_safe $header
1113 #include <$header>
1114 int x;
1115 EOF
1116 }
1117
1118 check_header_objcc(){
1119     log check_header_objcc "$@"
1120     rm -f -- "$TMPO"
1121     header=$1
1122     shift
1123     disable_safe $header
1124     {
1125        echo "#include <$header>"
1126        echo "int main(void) { return 0; }"
1127     } | check_objcc && check_stat "$TMPO" && enable_safe $header
1128 }
1129
1130 check_apple_framework(){
1131     log check_apple_framework "$@"
1132     framework="$1"
1133     name="$(tolower $framework)"
1134     header="${framework}/${framework}.h"
1135     disable $name
1136     check_header_objcc $header && enable $name && add_extralibs "-framework $framework"
1137 }
1138
1139 check_func(){
1140     log check_func "$@"
1141     func=$1
1142     shift
1143     disable $func
1144     check_ld "cc" "$@" <<EOF && enable $func
1145 extern int $func();
1146 int main(void){ $func(); }
1147 EOF
1148 }
1149
1150 check_complexfunc(){
1151     log check_complexfunc "$@"
1152     func=$1
1153     narg=$2
1154     shift 2
1155     test $narg = 2 && args="f, g" || args="f * I"
1156     disable $func
1157     check_ld "cc" "$@" <<EOF && enable $func
1158 #include <complex.h>
1159 #include <math.h>
1160 float foo(complex float f, complex float g) { return $func($args); }
1161 int main(void){ return (int) foo; }
1162 EOF
1163 }
1164
1165 check_mathfunc(){
1166     log check_mathfunc "$@"
1167     func=$1
1168     narg=$2
1169     shift 2
1170     test $narg = 2 && args="f, g" || args="f"
1171     disable $func
1172     check_ld "cc" "$@" <<EOF && enable $func
1173 #include <math.h>
1174 float foo(float f, float g) { return $func($args); }
1175 int main(void){ return (int) foo; }
1176 EOF
1177 }
1178
1179 check_func_headers(){
1180     log check_func_headers "$@"
1181     headers=$1
1182     funcs=$2
1183     shift 2
1184     {
1185         for hdr in $headers; do
1186             print_include $hdr
1187         done
1188         echo "#include <stdint.h>"
1189         for func in $funcs; do
1190             echo "long check_$func(void) { return (long) $func; }"
1191         done
1192         echo "int main(void) { int ret = 0;"
1193         # LTO could optimize out the test functions without this
1194         for func in $funcs; do
1195             echo " ret |= ((intptr_t)check_$func) & 0xFFFF;"
1196         done
1197         echo "return ret; }"
1198     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
1199 }
1200
1201 check_class_headers_cpp(){
1202     log check_class_headers_cpp "$@"
1203     headers=$1
1204     classes=$2
1205     shift 2
1206     {
1207         for hdr in $headers; do
1208             echo "#include <$hdr>"
1209         done
1210         echo "int main(void) { "
1211         i=1
1212         for class in $classes; do
1213             echo "$class obj$i;"
1214             i=$(expr $i + 1)
1215         done
1216         echo "return 0; }"
1217     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
1218 }
1219
1220 check_cpp_condition(){
1221     log check_cpp_condition "$@"
1222     header=$1
1223     condition=$2
1224     shift 2
1225     check_cpp "$@" <<EOF
1226 #include <$header>
1227 #if !($condition)
1228 #error "unsatisfied condition: $condition"
1229 #endif
1230 EOF
1231 }
1232
1233 test_cflags_cc(){
1234     log test_cflags_cc "$@"
1235     flags=$1
1236     header=$2
1237     condition=$3
1238     shift 3
1239     set -- $($cflags_filter "$flags")
1240     check_cc "$@" <<EOF
1241 #include <$header>
1242 #if !($condition)
1243 #error "unsatisfied condition: $condition"
1244 #endif
1245 EOF
1246 }
1247
1248 check_lib(){
1249     log check_lib "$@"
1250     name="$1"
1251     headers="$2"
1252     funcs="$3"
1253     shift 3
1254     disable $name
1255     check_func_headers "$headers" "$funcs" "$@" &&
1256         enable $name && add_extralibs "$@"
1257 }
1258
1259 check_lib_cpp(){
1260     log check_lib_cpp "$@"
1261     headers="$1"
1262     classes="$2"
1263     shift 2
1264     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1265 }
1266
1267 check_pkg_config(){
1268     log check_pkg_config "$@"
1269     pkg_version="$1"
1270     pkg="${1%% *}"
1271     headers="$2"
1272     funcs="$3"
1273     shift 3
1274     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1275     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1276     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1277     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1278         set_safe "${pkg}_cflags"    $pkg_cflags &&
1279         set_safe "${pkg}_extralibs" $pkg_libs
1280 }
1281
1282 check_exec(){
1283     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1284 }
1285
1286 check_exec_crash(){
1287     log check_exec_crash "$@"
1288     code=$(cat)
1289
1290     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1291     # are safe but may not be available everywhere.  Thus we use
1292     # raise(SIGTERM) instead.  The check is run in a subshell so we
1293     # can redirect the "Terminated" message from the shell.  SIGBUS
1294     # is not defined by standard C so it is used conditionally.
1295
1296     (check_exec "$@") >> $logfile 2>&1 <<EOF
1297 #include <signal.h>
1298 static void sighandler(int sig){
1299     raise(SIGTERM);
1300 }
1301 int foo(void){
1302     $code
1303 }
1304 int (*func_ptr)(void) = foo;
1305 int main(void){
1306     signal(SIGILL, sighandler);
1307     signal(SIGFPE, sighandler);
1308     signal(SIGSEGV, sighandler);
1309 #ifdef SIGBUS
1310     signal(SIGBUS, sighandler);
1311 #endif
1312     return func_ptr();
1313 }
1314 EOF
1315 }
1316
1317 check_type(){
1318     log check_type "$@"
1319     headers=$1
1320     type=$2
1321     shift 2
1322     disable_safe "$type"
1323     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1324 }
1325
1326 check_struct(){
1327     log check_struct "$@"
1328     headers=$1
1329     struct=$2
1330     member=$3
1331     shift 3
1332     disable_safe "${struct}_${member}"
1333     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1334         enable_safe "${struct}_${member}"
1335 }
1336
1337 check_builtin(){
1338     log check_builtin "$@"
1339     name=$1
1340     headers=$2
1341     builtin=$3
1342     shift 3
1343     disable "$name"
1344     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1345 }
1346
1347 check_compile_assert(){
1348     log check_compile_assert "$@"
1349     name=$1
1350     headers=$2
1351     condition=$3
1352     shift 3
1353     disable "$name"
1354     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1355 }
1356
1357 require(){
1358     log require "$@"
1359     name_version="$1"
1360     name="${1%% *}"
1361     headers="$2"
1362     func="$3"
1363     shift 3
1364     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1365 }
1366
1367 require_cpp(){
1368     name="$1"
1369     headers="$2"
1370     classes="$3"
1371     shift 3
1372     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1373 }
1374
1375 require_header(){
1376     log require "$@"
1377     header="$1"
1378     shift
1379     check_header "$header" "$@" || die "ERROR: $header header not found"
1380 }
1381
1382 require_cpp_condition(){
1383     log require "$@"
1384     header="$1"
1385     condition="$2"
1386     shift 2
1387     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1388 }
1389
1390 use_pkg_config(){
1391     log use_pkg_config "$@"
1392     name="$1"
1393     shift
1394     pkg_version="$1"
1395     pkg="${1%% *}"
1396     test "$name" = "" && name=$pkg
1397     check_pkg_config "$@" || return 1
1398     add_cflags    $(get_safe "${pkg}_cflags")
1399     add_extralibs $(get_safe "${pkg}_extralibs")
1400 }
1401
1402 require_pkg_config(){
1403     use_pkg_config "$@" || die "ERROR: $pkg_version not found using pkg-config$pkg_config_fail_message"
1404 }
1405
1406 hostcc_e(){
1407     eval printf '%s\\n' $HOSTCC_E
1408 }
1409
1410 hostcc_o(){
1411     eval printf '%s\\n' $HOSTCC_O
1412 }
1413
1414 check_host_cc(){
1415     log check_host_cc "$@"
1416     cat > $TMPC
1417     log_file $TMPC
1418     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1419 }
1420
1421 check_host_cpp(){
1422     log check_host_cpp "$@"
1423     cat > $TMPC
1424     log_file $TMPC
1425     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1426 }
1427
1428 check_host_cppflags(){
1429     log check_host_cppflags "$@"
1430     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1431 #include <stdlib.h>
1432 EOF
1433 }
1434
1435 check_host_cflags(){
1436     log check_host_cflags "$@"
1437     set -- $($host_cflags_filter "$@")
1438     check_host_cc "$@" <<EOF && append host_cflags "$@"
1439 int x;
1440 EOF
1441 }
1442
1443 check_host_cpp_condition(){
1444     log check_host_cpp_condition "$@"
1445     header=$1
1446     condition=$2
1447     shift 2
1448     check_host_cpp "$@" <<EOF
1449 #include <$header>
1450 #if !($condition)
1451 #error "unsatisfied condition: $condition"
1452 #endif
1453 EOF
1454 }
1455
1456 cp_if_changed(){
1457     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1458     mkdir -p "$(dirname $2)"
1459     cp -f "$1" "$2"
1460 }
1461
1462 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1463 # system-dependent things.
1464
1465 AVCODEC_COMPONENTS="
1466     bsfs
1467     decoders
1468     encoders
1469     hwaccels
1470     parsers
1471 "
1472
1473 AVDEVICE_COMPONENTS="
1474     indevs
1475     outdevs
1476 "
1477
1478 AVFILTER_COMPONENTS="
1479     filters
1480 "
1481
1482 AVFORMAT_COMPONENTS="
1483     demuxers
1484     muxers
1485     protocols
1486 "
1487
1488 AVRESAMPLE_COMPONENTS=""
1489
1490 AVUTIL_COMPONENTS=""
1491
1492 COMPONENT_LIST="
1493     $AVCODEC_COMPONENTS
1494     $AVDEVICE_COMPONENTS
1495     $AVFILTER_COMPONENTS
1496     $AVFORMAT_COMPONENTS
1497     $AVRESAMPLE_COMPONENTS
1498     $AVUTIL_COMPONENTS
1499 "
1500
1501 EXAMPLE_LIST="
1502     avio_dir_cmd_example
1503     avio_reading_example
1504     decode_audio_example
1505     decode_video_example
1506     demuxing_decoding_example
1507     encode_audio_example
1508     encode_video_example
1509     extract_mvs_example
1510     filter_audio_example
1511     filtering_audio_example
1512     filtering_video_example
1513     http_multiclient_example
1514     hw_decode_example
1515     metadata_example
1516     muxing_example
1517     qsvdec_example
1518     remuxing_example
1519     resampling_audio_example
1520     scaling_video_example
1521     transcode_aac_example
1522     transcoding_example
1523 "
1524
1525 EXTERNAL_AUTODETECT_LIBRARY_LIST="
1526     alsa
1527     appkit
1528     avfoundation
1529     bzlib
1530     coreimage
1531     iconv
1532     jack
1533     libxcb
1534     libxcb_shm
1535     libxcb_shape
1536     libxcb_xfixes
1537     lzma
1538     schannel
1539     sdl2
1540     securetransport
1541     sndio
1542     xlib
1543     zlib
1544 "
1545
1546 EXTERNAL_LIBRARY_GPL_LIST="
1547     avisynth
1548     frei0r
1549     libcdio
1550     librubberband
1551     libvidstab
1552     libx264
1553     libx265
1554     libxavs
1555     libxvid
1556 "
1557
1558 EXTERNAL_LIBRARY_NONFREE_LIST="
1559     decklink
1560     libndi_newtek
1561     libfdk_aac
1562     openssl
1563 "
1564
1565 EXTERNAL_LIBRARY_VERSION3_LIST="
1566     gmp
1567     libopencore_amrnb
1568     libopencore_amrwb
1569     libvo_amrwbenc
1570 "
1571
1572 EXTERNAL_LIBRARY_GPLV3_LIST="
1573     libsmbclient
1574 "
1575
1576 EXTERNAL_LIBRARY_LIST="
1577     $EXTERNAL_AUTODETECT_LIBRARY_LIST
1578     $EXTERNAL_LIBRARY_GPL_LIST
1579     $EXTERNAL_LIBRARY_NONFREE_LIST
1580     $EXTERNAL_LIBRARY_VERSION3_LIST
1581     $EXTERNAL_LIBRARY_GPLV3_LIST
1582     chromaprint
1583     gcrypt
1584     gnutls
1585     jni
1586     ladspa
1587     libass
1588     libbluray
1589     libbs2b
1590     libcaca
1591     libcelt
1592     libdc1394
1593     libdrm
1594     libflite
1595     libfontconfig
1596     libfreetype
1597     libfribidi
1598     libgme
1599     libgsm
1600     libiec61883
1601     libilbc
1602     libkvazaar
1603     libmodplug
1604     libmp3lame
1605     libmysofa
1606     libopencv
1607     libopenh264
1608     libopenjpeg
1609     libopenmpt
1610     libopus
1611     libpulse
1612     librsvg
1613     librtmp
1614     libshine
1615     libsmbclient
1616     libsnappy
1617     libsoxr
1618     libspeex
1619     libssh
1620     libtesseract
1621     libtheora
1622     libtwolame
1623     libv4l2
1624     libvmaf
1625     libvorbis
1626     libvpx
1627     libwavpack
1628     libwebp
1629     libxml2
1630     libzimg
1631     libzmq
1632     libzvbi
1633     mediacodec
1634     openal
1635     opencl
1636     opengl
1637 "
1638
1639 HWACCEL_AUTODETECT_LIBRARY_LIST="
1640     audiotoolbox
1641     crystalhd
1642     cuda
1643     cuvid
1644     d3d11va
1645     dxva2
1646     nvenc
1647     vaapi
1648     vda
1649     vdpau
1650     videotoolbox
1651     v4l2_m2m
1652     xvmc
1653 "
1654
1655 HWACCEL_LIBRARY_NONFREE_LIST="
1656     cuda_sdk
1657     libnpp
1658 "
1659
1660 HWACCEL_LIBRARY_LIST="
1661     $HWACCEL_AUTODETECT_LIBRARY_LIST
1662     $HWACCEL_LIBRARY_NONFREE_LIST
1663     libmfx
1664     mmal
1665     omx
1666 "
1667
1668 DOCUMENT_LIST="
1669     doc
1670     htmlpages
1671     manpages
1672     podpages
1673     txtpages
1674 "
1675
1676 FEATURE_LIST="
1677     ftrapv
1678     gray
1679     hardcoded_tables
1680     omx_rpi
1681     runtime_cpudetect
1682     safe_bitstream_reader
1683     shared
1684     small
1685     static
1686     swscale_alpha
1687 "
1688
1689 LIBRARY_LIST="
1690     avcodec
1691     avdevice
1692     avfilter
1693     avformat
1694     avresample
1695     avutil
1696     postproc
1697     swresample
1698     swscale
1699 "
1700
1701 LICENSE_LIST="
1702     gpl
1703     nonfree
1704     version3
1705 "
1706
1707 PROGRAM_LIST="
1708     ffplay
1709     ffprobe
1710     ffserver
1711     ffmpeg
1712 "
1713
1714 SUBSYSTEM_LIST="
1715     dct
1716     dwt
1717     error_resilience
1718     faan
1719     fast_unaligned
1720     fft
1721     lsp
1722     lzo
1723     mdct
1724     pixelutils
1725     network
1726     rdft
1727 "
1728
1729 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1730 CONFIG_LIST="
1731     $DOCUMENT_LIST
1732     $EXAMPLE_LIST
1733     $EXTERNAL_LIBRARY_LIST
1734     $HWACCEL_LIBRARY_LIST
1735     $FEATURE_LIST
1736     $LICENSE_LIST
1737     $LIBRARY_LIST
1738     $PROGRAM_LIST
1739     $SUBSYSTEM_LIST
1740     autodetect
1741     fontconfig
1742     linux_perf
1743     memory_poisoning
1744     neon_clobber_test
1745     ossfuzz
1746     pic
1747     thumb
1748     valgrind_backtrace
1749     xmm_clobber_test
1750     $COMPONENT_LIST
1751 "
1752
1753 THREADS_LIST="
1754     pthreads
1755     os2threads
1756     w32threads
1757 "
1758
1759 ATOMICS_LIST="
1760     atomics_gcc
1761     atomics_suncc
1762     atomics_win32
1763 "
1764
1765 AUTODETECT_LIBS="
1766     $EXTERNAL_AUTODETECT_LIBRARY_LIST
1767     $HWACCEL_AUTODETECT_LIBRARY_LIST
1768     $THREADS_LIST
1769 "
1770
1771 ARCH_LIST="
1772     aarch64
1773     alpha
1774     arm
1775     avr32
1776     avr32_ap
1777     avr32_uc
1778     bfin
1779     ia64
1780     m68k
1781     mips
1782     mips64
1783     parisc
1784     ppc
1785     ppc64
1786     s390
1787     sh4
1788     sparc
1789     sparc64
1790     tilegx
1791     tilepro
1792     tomi
1793     x86
1794     x86_32
1795     x86_64
1796 "
1797
1798 ARCH_EXT_LIST_ARM="
1799     armv5te
1800     armv6
1801     armv6t2
1802     armv8
1803     neon
1804     vfp
1805     vfpv3
1806     setend
1807 "
1808
1809 ARCH_EXT_LIST_MIPS="
1810     mipsfpu
1811     mips32r2
1812     mips32r5
1813     mips64r2
1814     mips32r6
1815     mips64r6
1816     mipsdsp
1817     mipsdspr2
1818     msa
1819 "
1820
1821 ARCH_EXT_LIST_LOONGSON="
1822     loongson2
1823     loongson3
1824     mmi
1825 "
1826
1827 ARCH_EXT_LIST_X86_SIMD="
1828     aesni
1829     amd3dnow
1830     amd3dnowext
1831     avx
1832     avx2
1833     fma3
1834     fma4
1835     mmx
1836     mmxext
1837     sse
1838     sse2
1839     sse3
1840     sse4
1841     sse42
1842     ssse3
1843     xop
1844 "
1845
1846 ARCH_EXT_LIST_PPC="
1847     altivec
1848     dcbzl
1849     ldbrx
1850     power8
1851     ppc4xx
1852     vsx
1853 "
1854
1855 ARCH_EXT_LIST_X86="
1856     $ARCH_EXT_LIST_X86_SIMD
1857     cpunop
1858     i686
1859 "
1860
1861 ARCH_EXT_LIST="
1862     $ARCH_EXT_LIST_ARM
1863     $ARCH_EXT_LIST_PPC
1864     $ARCH_EXT_LIST_X86
1865     $ARCH_EXT_LIST_MIPS
1866     $ARCH_EXT_LIST_LOONGSON
1867 "
1868
1869 ARCH_FEATURES="
1870     aligned_stack
1871     fast_64bit
1872     fast_clz
1873     fast_cmov
1874     local_aligned_8
1875     local_aligned_16
1876     local_aligned_32
1877     simd_align_16
1878     simd_align_32
1879 "
1880
1881 BUILTIN_LIST="
1882     atomic_cas_ptr
1883     machine_rw_barrier
1884     MemoryBarrier
1885     mm_empty
1886     rdtsc
1887     sarestart
1888     sem_timedwait
1889     sync_val_compare_and_swap
1890 "
1891 HAVE_LIST_CMDLINE="
1892     inline_asm
1893     symver
1894     x86asm
1895 "
1896
1897 HAVE_LIST_PUB="
1898     bigendian
1899     fast_unaligned
1900 "
1901
1902 HEADERS_LIST="
1903     altivec_h
1904     arpa_inet_h
1905     asm_types_h
1906     cdio_paranoia_h
1907     cdio_paranoia_paranoia_h
1908     cuda_h
1909     d3d11_h
1910     dispatch_dispatch_h
1911     dev_bktr_ioctl_bt848_h
1912     dev_bktr_ioctl_meteor_h
1913     dev_ic_bt8xx_h
1914     dev_video_bktr_ioctl_bt848_h
1915     dev_video_meteor_ioctl_meteor_h
1916     direct_h
1917     dirent_h
1918     dlfcn_h
1919     dxgidebug_h
1920     dxva_h
1921     ES2_gl_h
1922     gsm_h
1923     io_h
1924     mach_mach_time_h
1925     machine_ioctl_bt848_h
1926     machine_ioctl_meteor_h
1927     malloc_h
1928     opencv2_core_core_c_h
1929     openjpeg_2_2_openjpeg_h
1930     openjpeg_2_1_openjpeg_h
1931     openjpeg_2_0_openjpeg_h
1932     openjpeg_1_5_openjpeg_h
1933     OpenGL_gl3_h
1934     poll_h
1935     soundcard_h
1936     stdatomic_h
1937     sys_mman_h
1938     sys_param_h
1939     sys_resource_h
1940     sys_select_h
1941     sys_soundcard_h
1942     sys_time_h
1943     sys_un_h
1944     sys_videoio_h
1945     termios_h
1946     udplite_h
1947     unistd_h
1948     valgrind_valgrind_h
1949     windows_h
1950     winsock2_h
1951 "
1952
1953 INTRINSICS_LIST="
1954     intrinsics_neon
1955 "
1956
1957 COMPLEX_FUNCS="
1958     cabs
1959     cexp
1960 "
1961
1962 MATH_FUNCS="
1963     atanf
1964     atan2f
1965     cbrt
1966     cbrtf
1967     copysign
1968     cosf
1969     erf
1970     exp2
1971     exp2f
1972     expf
1973     hypot
1974     isfinite
1975     isinf
1976     isnan
1977     ldexpf
1978     llrint
1979     llrintf
1980     log2
1981     log2f
1982     log10f
1983     lrint
1984     lrintf
1985     powf
1986     rint
1987     round
1988     roundf
1989     sinf
1990     trunc
1991     truncf
1992 "
1993
1994 SYSTEM_FUNCS="
1995     access
1996     aligned_malloc
1997     arc4random
1998     clock_gettime
1999     closesocket
2000     CommandLineToArgvW
2001     CoTaskMemFree
2002     CryptGenRandom
2003     dlopen
2004     fcntl
2005     flt_lim
2006     fork
2007     getaddrinfo
2008     gethrtime
2009     getopt
2010     GetProcessAffinityMask
2011     GetProcessMemoryInfo
2012     GetProcessTimes
2013     getrusage
2014     GetSystemTimeAsFileTime
2015     gettimeofday
2016     glob
2017     glXGetProcAddress
2018     gmtime_r
2019     inet_aton
2020     isatty
2021     jack_port_get_latency_range
2022     kbhit
2023     LoadLibrary
2024     localtime_r
2025     lstat
2026     lzo1x_999_compress
2027     mach_absolute_time
2028     MapViewOfFile
2029     memalign
2030     mkstemp
2031     mmap
2032     mprotect
2033     nanosleep
2034     PeekNamedPipe
2035     posix_memalign
2036     pthread_cancel
2037     sched_getaffinity
2038     SetConsoleTextAttribute
2039     SetConsoleCtrlHandler
2040     setmode
2041     setrlimit
2042     Sleep
2043     strerror_r
2044     sysconf
2045     sysctl
2046     usleep
2047     UTGetOSTypeFromString
2048     VirtualAlloc
2049     wglGetProcAddress
2050 "
2051
2052 TOOLCHAIN_FEATURES="
2053     as_dn_directive
2054     as_fpu_directive
2055     as_func
2056     as_object_arch
2057     asm_mod_q
2058     attribute_may_alias
2059     attribute_packed
2060     blocks_extension
2061     ebp_available
2062     ebx_available
2063     gnu_as
2064     gnu_windres
2065     ibm_asm
2066     inline_asm_direct_symbol_refs
2067     inline_asm_labels
2068     inline_asm_nonlocal_labels
2069     pragma_deprecated
2070     rsync_contimeout
2071     symver_asm_label
2072     symver_gnu_asm
2073     vfp_args
2074     xform_asm
2075     xmm_clobbers
2076 "
2077
2078 TYPES_LIST="
2079     CONDITION_VARIABLE_Ptr
2080     socklen_t
2081     struct_addrinfo
2082     struct_group_source_req
2083     struct_ip_mreq_source
2084     struct_ipv6_mreq
2085     struct_msghdr_msg_flags
2086     struct_pollfd
2087     struct_rusage_ru_maxrss
2088     struct_sctp_event_subscribe
2089     struct_sockaddr_in6
2090     struct_sockaddr_sa_len
2091     struct_sockaddr_storage
2092     struct_stat_st_mtim_tv_nsec
2093     struct_v4l2_frmivalenum_discrete
2094 "
2095
2096 HAVE_LIST="
2097     $ARCH_EXT_LIST
2098     $(add_suffix _external $ARCH_EXT_LIST)
2099     $(add_suffix _inline   $ARCH_EXT_LIST)
2100     $ARCH_FEATURES
2101     $ATOMICS_LIST
2102     $BUILTIN_LIST
2103     $COMPLEX_FUNCS
2104     $HAVE_LIST_CMDLINE
2105     $HAVE_LIST_PUB
2106     $HEADERS_LIST
2107     $INTRINSICS_LIST
2108     $MATH_FUNCS
2109     $SYSTEM_FUNCS
2110     $THREADS_LIST
2111     $TOOLCHAIN_FEATURES
2112     $TYPES_LIST
2113     atomics_native
2114     dos_paths
2115     libc_msvcrt
2116     makeinfo
2117     makeinfo_html
2118     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
2119     perl
2120     pod2man
2121     section_data_rel_ro
2122     texi2html
2123     threads
2124     uwp
2125     vaapi_drm
2126     vaapi_x11
2127     vdpau_x11
2128     winrt
2129 "
2130
2131 # options emitted with CONFIG_ prefix but not available on the command line
2132 CONFIG_EXTRA="
2133     aandcttables
2134     ac3dsp
2135     audio_frame_queue
2136     audiodsp
2137     blockdsp
2138     bswapdsp
2139     cabac
2140     dirac_parse
2141     dvprofile
2142     exif
2143     faandct
2144     faanidct
2145     fdctdsp
2146     flacdsp
2147     fmtconvert
2148     frame_thread_encoder
2149     g722dsp
2150     golomb
2151     gplv3
2152     h263dsp
2153     h264chroma
2154     h264dsp
2155     h264parse
2156     h264pred
2157     h264qpel
2158     hevcparse
2159     hpeldsp
2160     huffman
2161     huffyuvdsp
2162     huffyuvencdsp
2163     idctdsp
2164     iirfilter
2165     mdct15
2166     intrax8
2167     iso_media
2168     ividsp
2169     jpegtables
2170     lgplv3
2171     libx262
2172     llauddsp
2173     llviddsp
2174     llvidencdsp
2175     lpc
2176     lzf
2177     me_cmp
2178     mpeg_er
2179     mpegaudio
2180     mpegaudiodsp
2181     mpegaudioheader
2182     mpegvideo
2183     mpegvideoenc
2184     mss34dsp
2185     pixblockdsp
2186     qpeldsp
2187     qsv
2188     qsvdec
2189     qsvenc
2190     rangecoder
2191     riffdec
2192     riffenc
2193     rtpdec
2194     rtpenc_chain
2195     rv34dsp
2196     sinewin
2197     snappy
2198     srtp
2199     startcode
2200     texturedsp
2201     texturedspenc
2202     tpeldsp
2203     vaapi_encode
2204     vc1dsp
2205     videodsp
2206     vp3dsp
2207     vp56dsp
2208     vp8dsp
2209     wma_freqs
2210     wmv2dsp
2211 "
2212
2213 CMDLINE_SELECT="
2214     $ARCH_EXT_LIST
2215     $CONFIG_LIST
2216     $HAVE_LIST_CMDLINE
2217     $THREADS_LIST
2218     asm
2219     cross_compile
2220     debug
2221     extra_warnings
2222     logging
2223     lto
2224     optimizations
2225     rpath
2226     stripping
2227 "
2228
2229 PATHS_LIST="
2230     bindir
2231     datadir
2232     docdir
2233     incdir
2234     libdir
2235     mandir
2236     pkgconfigdir
2237     prefix
2238     shlibdir
2239     install_name_dir
2240 "
2241
2242 CMDLINE_SET="
2243     $PATHS_LIST
2244     ar
2245     arch
2246     as
2247     assert_level
2248     build_suffix
2249     cc
2250     objcc
2251     cpu
2252     cross_prefix
2253     custom_allocator
2254     cxx
2255     dep_cc
2256     doxygen
2257     env
2258     extra_version
2259     gas
2260     host_cc
2261     host_cflags
2262     host_extralibs
2263     host_ld
2264     host_ldflags
2265     host_os
2266     ignore_tests
2267     install
2268     ld
2269     ln_s
2270     logfile
2271     malloc_prefix
2272     nm
2273     optflags
2274     nvccflags
2275     pkg_config
2276     pkg_config_flags
2277     progs_suffix
2278     random_seed
2279     ranlib
2280     samples
2281     strip
2282     sws_max_filter_size
2283     sysinclude
2284     sysroot
2285     target_exec
2286     target_os
2287     target_path
2288     target_samples
2289     tempprefix
2290     toolchain
2291     valgrind
2292     x86asmexe
2293 "
2294
2295 CMDLINE_APPEND="
2296     extra_cflags
2297     extra_cxxflags
2298     extra_objcflags
2299     host_cppflags
2300 "
2301
2302 # code dependency declarations
2303
2304 # architecture extensions
2305
2306 armv5te_deps="arm"
2307 armv6_deps="arm"
2308 armv6t2_deps="arm"
2309 armv8_deps="aarch64"
2310 neon_deps_any="aarch64 arm"
2311 intrinsics_neon_deps="neon"
2312 vfp_deps_any="aarch64 arm"
2313 vfpv3_deps="vfp"
2314 setend_deps="arm"
2315
2316 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
2317
2318 loongson2_deps="mips"
2319 loongson3_deps="mips"
2320 mipsfpu_deps="mips"
2321 mipsdsp_deps="mips"
2322 mipsdspr2_deps="mips"
2323 mips32r2_deps="mips"
2324 mips32r5_deps="mips"
2325 mips32r6_deps="mips"
2326 mips64r2_deps="mips"
2327 mips64r6_deps="mips"
2328 msa_deps="mipsfpu"
2329 mmi_deps="mips"
2330
2331 altivec_deps="ppc"
2332 dcbzl_deps="ppc"
2333 ldbrx_deps="ppc"
2334 ppc4xx_deps="ppc"
2335 vsx_deps="altivec"
2336 power8_deps="vsx"
2337
2338 cpunop_deps="i686"
2339 x86_64_select="i686"
2340 x86_64_suggest="fast_cmov"
2341
2342 amd3dnow_deps="mmx"
2343 amd3dnowext_deps="amd3dnow"
2344 i686_deps="x86"
2345 mmx_deps="x86"
2346 mmxext_deps="mmx"
2347 sse_deps="mmxext"
2348 sse2_deps="sse"
2349 sse3_deps="sse2"
2350 ssse3_deps="sse3"
2351 sse4_deps="ssse3"
2352 sse42_deps="sse4"
2353 aesni_deps="sse42"
2354 avx_deps="sse42"
2355 xop_deps="avx"
2356 fma3_deps="avx"
2357 fma4_deps="avx"
2358 avx2_deps="avx"
2359
2360 mmx_external_deps="x86asm"
2361 mmx_inline_deps="inline_asm"
2362 mmx_suggest="mmx_external mmx_inline"
2363
2364 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2365     eval dep=\$${ext}_deps
2366     eval ${ext}_external_deps='"${dep}_external"'
2367     eval ${ext}_inline_deps='"${dep}_inline"'
2368     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2369 done
2370
2371 aligned_stack_if_any="aarch64 ppc x86"
2372 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2373 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2374 fast_unaligned_if_any="aarch64 ppc x86"
2375 simd_align_16_if_any="altivec neon sse"
2376 simd_align_32_if_any="avx"
2377
2378 # system capabilities
2379 symver_if_any="symver_asm_label symver_gnu_asm"
2380 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
2381
2382 # threading support
2383 atomics_gcc_if="sync_val_compare_and_swap"
2384 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2385 atomics_win32_if="MemoryBarrier"
2386 atomics_native_if_any="$ATOMICS_LIST"
2387 w32threads_deps="atomics_native"
2388 threads_if_any="$THREADS_LIST"
2389
2390 # subsystems
2391 dct_select="rdft"
2392 dirac_parse_select="golomb"
2393 error_resilience_select="me_cmp"
2394 faandct_deps="faan fdctdsp"
2395 faanidct_deps="faan idctdsp"
2396 h264dsp_select="startcode"
2397 hevcparse_select="golomb"
2398 frame_thread_encoder_deps="encoders threads"
2399 intrax8_select="blockdsp idctdsp"
2400 mdct_select="fft"
2401 mdct15_select="fft"
2402 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2403 mpeg_er_select="error_resilience"
2404 mpegaudio_select="mpegaudiodsp mpegaudioheader"
2405 mpegaudiodsp_select="dct"
2406 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp mpeg_er videodsp"
2407 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2408 vc1dsp_select="h264chroma qpeldsp startcode"
2409 rdft_select="fft"
2410
2411 # decoders / encoders
2412 aac_decoder_select="mdct15 mdct sinewin"
2413 aac_fixed_decoder_select="mdct sinewin"
2414 aac_encoder_select="audio_frame_queue iirfilter lpc mdct sinewin"
2415 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2416 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2417 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2418 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2419 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2420 adpcm_g722_decoder_select="g722dsp"
2421 adpcm_g722_encoder_select="g722dsp"
2422 aic_decoder_select="golomb idctdsp"
2423 alac_encoder_select="lpc"
2424 als_decoder_select="bswapdsp"
2425 amrnb_decoder_select="lsp"
2426 amrwb_decoder_select="lsp"
2427 amv_decoder_select="sp5x_decoder exif"
2428 amv_encoder_select="aandcttables jpegtables mpegvideoenc"
2429 ape_decoder_select="bswapdsp llauddsp"
2430 apng_decoder_select="zlib"
2431 apng_encoder_select="llvidencdsp zlib"
2432 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2433 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2434 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2435 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2436 atrac1_decoder_select="mdct sinewin"
2437 atrac3_decoder_select="mdct"
2438 atrac3p_decoder_select="mdct sinewin"
2439 avrn_decoder_select="exif jpegtables"
2440 bink_decoder_select="blockdsp hpeldsp"
2441 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2442 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2443 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2444 clearvideo_decoder_select="idctdsp"
2445 cllc_decoder_select="bswapdsp"
2446 comfortnoise_encoder_select="lpc"
2447 cook_decoder_select="audiodsp mdct sinewin"
2448 cscd_decoder_select="lzo"
2449 cscd_decoder_suggest="zlib"
2450 dca_decoder_select="mdct"
2451 dds_decoder_select="texturedsp"
2452 dirac_decoder_select="dirac_parse dwt golomb videodsp mpegvideoenc"
2453 dnxhd_decoder_select="blockdsp idctdsp"
2454 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2455 dolby_e_decoder_select="mdct"
2456 dvvideo_decoder_select="dvprofile idctdsp"
2457 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2458 dxa_decoder_select="zlib"
2459 dxv_decoder_select="lzf texturedsp"
2460 eac3_decoder_select="ac3_decoder"
2461 eac3_encoder_select="ac3_encoder"
2462 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2463 eatgq_decoder_select="aandcttables"
2464 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2465 exr_decoder_select="zlib"
2466 ffv1_decoder_select="rangecoder"
2467 ffv1_encoder_select="rangecoder"
2468 ffvhuff_decoder_select="huffyuv_decoder"
2469 ffvhuff_encoder_select="huffyuv_encoder"
2470 fic_decoder_select="golomb"
2471 flac_decoder_select="flacdsp"
2472 flac_encoder_select="bswapdsp flacdsp lpc"
2473 flashsv2_decoder_select="zlib"
2474 flashsv2_encoder_select="zlib"
2475 flashsv_decoder_select="zlib"
2476 flashsv_encoder_select="zlib"
2477 flv_decoder_select="h263_decoder"
2478 flv_encoder_select="h263_encoder"
2479 fourxm_decoder_select="blockdsp bswapdsp"
2480 fraps_decoder_select="bswapdsp huffman"
2481 g2m_decoder_select="blockdsp idctdsp jpegtables zlib"
2482 g729_decoder_select="audiodsp"
2483 h261_decoder_select="mpegvideo"
2484 h261_encoder_select="aandcttables mpegvideoenc"
2485 h263_decoder_select="h263_parser h263dsp mpegvideo qpeldsp"
2486 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2487 h263i_decoder_select="h263_decoder"
2488 h263p_decoder_select="h263_decoder"
2489 h263p_encoder_select="h263_encoder"
2490 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2491 h264_decoder_suggest="error_resilience"
2492 hap_decoder_select="snappy texturedsp"
2493 hap_encoder_deps="libsnappy"
2494 hap_encoder_select="texturedspenc"
2495 hevc_decoder_select="bswapdsp cabac golomb hevcparse videodsp"
2496 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2497 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llvidencdsp"
2498 iac_decoder_select="imc_decoder"
2499 imc_decoder_select="bswapdsp fft mdct sinewin"
2500 indeo3_decoder_select="hpeldsp"
2501 indeo4_decoder_select="ividsp"
2502 indeo5_decoder_select="ividsp"
2503 interplay_video_decoder_select="hpeldsp"
2504 jpegls_decoder_select="mjpeg_decoder"
2505 jv_decoder_select="blockdsp"
2506 lagarith_decoder_select="llviddsp"
2507 ljpeg_encoder_select="aandcttables idctdsp jpegtables mpegvideoenc"
2508 magicyuv_decoder_select="llviddsp"
2509 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2510 metasound_decoder_select="lsp mdct sinewin"
2511 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2512 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp jpegtables"
2513 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2514 mjpegb_decoder_select="mjpeg_decoder"
2515 mlp_decoder_select="mlp_parser"
2516 mlp_encoder_select="lpc"
2517 motionpixels_decoder_select="bswapdsp"
2518 mp1_decoder_select="mpegaudio"
2519 mp1float_decoder_select="mpegaudio"
2520 mp2_decoder_select="mpegaudio"
2521 mp2float_decoder_select="mpegaudio"
2522 mp3_decoder_select="mpegaudio"
2523 mp3adu_decoder_select="mpegaudio"
2524 mp3adufloat_decoder_select="mpegaudio"
2525 mp3float_decoder_select="mpegaudio"
2526 mp3on4_decoder_select="mpegaudio"
2527 mp3on4float_decoder_select="mpegaudio"
2528 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2529 mpc8_decoder_select="mpegaudiodsp"
2530 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2531 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2532 mpegvideo_decoder_select="mpegvideo"
2533 mpeg1video_decoder_select="mpegvideo"
2534 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2535 mpeg2video_decoder_select="mpegvideo"
2536 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2537 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2538 mpeg4_encoder_select="h263_encoder"
2539 msa1_decoder_select="mss34dsp"
2540 mscc_decoder_select="zlib"
2541 msmpeg4v1_decoder_select="h263_decoder"
2542 msmpeg4v2_decoder_select="h263_decoder"
2543 msmpeg4v2_encoder_select="h263_encoder"
2544 msmpeg4v3_decoder_select="h263_decoder"
2545 msmpeg4v3_encoder_select="h263_encoder"
2546 mss2_decoder_select="mpegvideo qpeldsp vc1_decoder"
2547 mts2_decoder_select="mss34dsp"
2548 mxpeg_decoder_select="mjpeg_decoder"
2549 nellymoser_decoder_select="mdct sinewin"
2550 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2551 nuv_decoder_select="idctdsp lzo"
2552 on2avc_decoder_select="mdct"
2553 opus_decoder_deps="swresample"
2554 opus_decoder_select="mdct15"
2555 opus_encoder_select="audio_frame_queue mdct15"
2556 png_decoder_select="zlib"
2557 png_encoder_select="llvidencdsp zlib"
2558 prores_decoder_select="blockdsp idctdsp"
2559 prores_encoder_select="fdctdsp"
2560 qcelp_decoder_select="lsp"
2561 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2562 ra_144_decoder_select="audiodsp"
2563 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2564 ralf_decoder_select="golomb"
2565 rawvideo_decoder_select="bswapdsp"
2566 rscc_decoder_select="zlib"
2567 rtjpeg_decoder_select="me_cmp"
2568 rv10_decoder_select="h263_decoder"
2569 rv10_encoder_select="h263_encoder"
2570 rv20_decoder_select="h263_decoder"
2571 rv20_encoder_select="h263_encoder"
2572 rv30_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2573 rv40_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2574 screenpresso_decoder_select="zlib"
2575 shorten_decoder_select="bswapdsp"
2576 sipr_decoder_select="lsp"
2577 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2578 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2579 sonic_decoder_select="golomb rangecoder"
2580 sonic_encoder_select="golomb rangecoder"
2581 sonic_ls_encoder_select="golomb rangecoder"
2582 sp5x_decoder_select="mjpeg_decoder"
2583 srgc_decoder_select="zlib"
2584 svq1_decoder_select="hpeldsp"
2585 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2586 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2587 svq3_decoder_suggest="zlib"
2588 tak_decoder_select="audiodsp"
2589 tdsc_decoder_select="zlib mjpeg_decoder"
2590 theora_decoder_select="vp3_decoder"
2591 thp_decoder_select="mjpeg_decoder"
2592 tiff_decoder_suggest="zlib lzma"
2593 tiff_encoder_suggest="zlib"
2594 truehd_decoder_select="mlp_parser"
2595 truehd_encoder_select="lpc"
2596 truemotion2_decoder_select="bswapdsp"
2597 truespeech_decoder_select="bswapdsp"
2598 tscc_decoder_select="zlib"
2599 twinvq_decoder_select="mdct lsp sinewin"
2600 txd_decoder_select="texturedsp"
2601 utvideo_decoder_select="bswapdsp llviddsp"
2602 utvideo_encoder_select="bswapdsp huffman llvidencdsp"
2603 vble_decoder_select="llviddsp"
2604 vc1_decoder_select="blockdsp h263_decoder h264qpel intrax8 mpegvideo vc1dsp"
2605 vc1_qsv_decoder_deps="libmfx"
2606 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2607 vc1image_decoder_select="vc1_decoder"
2608 vorbis_decoder_select="mdct"
2609 vorbis_encoder_select="mdct"
2610 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2611 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2612 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2613 vp6a_decoder_select="vp6_decoder"
2614 vp6f_decoder_select="vp6_decoder"
2615 vp7_decoder_select="h264pred videodsp vp8dsp"
2616 vp8_decoder_select="h264pred videodsp vp8dsp"
2617 vp9_decoder_select="videodsp vp9_parser"
2618 webp_decoder_select="vp8_decoder exif"
2619 wmalossless_decoder_select="llauddsp"
2620 wmapro_decoder_select="mdct sinewin wma_freqs"
2621 wmav1_decoder_select="mdct sinewin wma_freqs"
2622 wmav1_encoder_select="mdct sinewin wma_freqs"
2623 wmav2_decoder_select="mdct sinewin wma_freqs"
2624 wmav2_encoder_select="mdct sinewin wma_freqs"
2625 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2626 wmv1_decoder_select="h263_decoder"
2627 wmv1_encoder_select="h263_encoder"
2628 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2629 wmv2_encoder_select="h263_encoder wmv2dsp"
2630 wmv3_decoder_select="vc1_decoder"
2631 wmv3image_decoder_select="wmv3_decoder"
2632 xma1_decoder_select="wmapro_decoder"
2633 xma2_decoder_select="wmapro_decoder"
2634 zerocodec_decoder_select="zlib"
2635 zlib_decoder_select="zlib"
2636 zlib_encoder_select="zlib"
2637 zmbv_decoder_select="zlib"
2638 zmbv_encoder_select="zlib"
2639
2640 # hardware accelerators
2641 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2642 cuda_deps_any="dlopen LoadLibrary"
2643 cuvid_deps="cuda"
2644 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder ID3D11VideoContext"
2645 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32"
2646 dxva2_extralibs="-luser32"
2647 vda_framework_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension"
2648 vda_framework_extralibs="-framework VideoDecodeAcceleration"
2649 vda_deps="vda_framework pthreads"
2650 vda_extralibs="-framework CoreFoundation -framework QuartzCore"
2651 videotoolbox_hwaccel_deps="videotoolbox pthreads"
2652 videotoolbox_hwaccel_extralibs="-framework QuartzCore"
2653 xvmc_deps="X11_extensions_XvMClib_h"
2654
2655 h263_vaapi_hwaccel_deps="vaapi"
2656 h263_vaapi_hwaccel_select="h263_decoder"
2657 h263_videotoolbox_hwaccel_deps="videotoolbox"
2658 h263_videotoolbox_hwaccel_select="h263_decoder"
2659 h264_cuvid_hwaccel_deps="cuda cuvid"
2660 h264_cuvid_hwaccel_select="h264_cuvid_decoder"
2661 h264_d3d11va_hwaccel_deps="d3d11va"
2662 h264_d3d11va_hwaccel_select="h264_decoder"
2663 h264_d3d11va2_hwaccel_deps="d3d11va"
2664 h264_d3d11va2_hwaccel_select="h264_decoder"
2665 h264_dxva2_hwaccel_deps="dxva2"
2666 h264_dxva2_hwaccel_select="h264_decoder"
2667 h264_mediacodec_hwaccel_deps="mediacodec"
2668 h264_mmal_hwaccel_deps="mmal"
2669 h264_qsv_hwaccel_deps="libmfx"
2670 h264_vaapi_hwaccel_deps="vaapi"
2671 h264_vaapi_hwaccel_select="h264_decoder"
2672 h264_vda_hwaccel_deps="vda"
2673 h264_vda_hwaccel_select="h264_decoder"
2674 h264_vda_old_hwaccel_deps="vda"
2675 h264_vda_old_hwaccel_select="h264_decoder"
2676 h264_vdpau_hwaccel_deps="vdpau"
2677 h264_vdpau_hwaccel_select="h264_decoder"
2678 h264_videotoolbox_hwaccel_deps="videotoolbox"
2679 h264_videotoolbox_hwaccel_select="h264_decoder"
2680 hevc_cuvid_hwaccel_deps="cuda cuvid"
2681 hevc_cuvid_hwaccel_select="hevc_cuvid_decoder"
2682 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2683 hevc_d3d11va_hwaccel_select="hevc_decoder"
2684 hevc_mediacodec_hwaccel_deps="mediacodec"
2685 hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2686 hevc_d3d11va2_hwaccel_select="hevc_decoder"
2687 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2688 hevc_dxva2_hwaccel_select="hevc_decoder"
2689 hevc_qsv_hwaccel_deps="libmfx"
2690 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2691 hevc_vaapi_hwaccel_select="hevc_decoder"
2692 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2693 hevc_vdpau_hwaccel_select="hevc_decoder"
2694 mjpeg_cuvid_hwaccel_deps="cuda cuvid"
2695 mjpeg_cuvid_hwaccel_select="mjpeg_cuvid_decoder"
2696 mpeg_xvmc_hwaccel_deps="xvmc"
2697 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2698 mpeg1_cuvid_hwaccel_deps="cuda cuvid"
2699 mpeg1_cuvid_hwaccel_select="mpeg1_cuvid_decoder"
2700 mpeg1_vdpau_hwaccel_deps="vdpau"
2701 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2702 mpeg1_videotoolbox_hwaccel_deps="videotoolbox"
2703 mpeg1_videotoolbox_hwaccel_select="mpeg1video_decoder"
2704 mpeg1_xvmc_hwaccel_deps="xvmc"
2705 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2706 mpeg2_cuvid_hwaccel_deps="cuda cuvid"
2707 mpeg2_cuvid_hwaccel_select="mpeg2_cuvid_decoder"
2708 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2709 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2710 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2711 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2712 mpeg2_dxva2_hwaccel_deps="dxva2"
2713 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2714 mpeg2_mediacodec_hwaccel_deps="mediacodec"
2715 mpeg2_mmal_hwaccel_deps="mmal"
2716 mpeg2_qsv_hwaccel_deps="libmfx"
2717 mpeg2_qsv_hwaccel_select="qsvdec_mpeg2"
2718 mpeg2_vaapi_hwaccel_deps="vaapi"
2719 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2720 mpeg2_vdpau_hwaccel_deps="vdpau"
2721 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2722 mpeg2_videotoolbox_hwaccel_deps="videotoolbox"
2723 mpeg2_videotoolbox_hwaccel_select="mpeg2video_decoder"
2724 mpeg2_xvmc_hwaccel_deps="xvmc"
2725 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2726 mpeg4_cuvid_hwaccel_deps="cuda cuvid"
2727 mpeg4_cuvid_hwaccel_select="mpeg4_cuvid_decoder"
2728 mpeg4_mediacodec_hwaccel_deps="mediacodec"
2729 mpeg4_mmal_hwaccel_deps="mmal"
2730 mpeg4_vaapi_hwaccel_deps="vaapi"
2731 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2732 mpeg4_vdpau_hwaccel_deps="vdpau"
2733 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2734 mpeg4_videotoolbox_hwaccel_deps="videotoolbox"
2735 mpeg4_videotoolbox_hwaccel_select="mpeg4_decoder"
2736 vc1_cuvid_hwaccel_deps="cuda cuvid"
2737 vc1_cuvid_hwaccel_select="vc1_cuvid_decoder"
2738 vc1_d3d11va_hwaccel_deps="d3d11va"
2739 vc1_d3d11va_hwaccel_select="vc1_decoder"
2740 vc1_d3d11va2_hwaccel_deps="d3d11va"
2741 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2742 vc1_dxva2_hwaccel_deps="dxva2"
2743 vc1_dxva2_hwaccel_select="vc1_decoder"
2744 vc1_mmal_hwaccel_deps="mmal"
2745 vc1_qsv_hwaccel_deps="libmfx"
2746 vc1_qsv_hwaccel_select="qsvdec_vc1"
2747 vc1_vaapi_hwaccel_deps="vaapi"
2748 vc1_vaapi_hwaccel_select="vc1_decoder"
2749 vc1_vdpau_hwaccel_deps="vdpau"
2750 vc1_vdpau_hwaccel_select="vc1_decoder"
2751 vp8_cuvid_hwaccel_deps="cuda cuvid"
2752 vp8_cuvid_hwaccel_select="vp8_cuvid_decoder"
2753 vp9_cuvid_hwaccel_deps="cuda cuvid"
2754 vp9_cuvid_hwaccel_select="vp9_cuvid_decoder"
2755 vp8_mediacodec_hwaccel_deps="mediacodec"
2756 vp8_qsv_hwaccel_deps="libmfx"
2757 vp9_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2758 vp9_d3d11va_hwaccel_select="vp9_decoder"
2759 vp9_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2760 vp9_d3d11va2_hwaccel_select="vp9_decoder"
2761 vp9_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_VP9"
2762 vp9_dxva2_hwaccel_select="vp9_decoder"
2763 vp9_mediacodec_hwaccel_deps="mediacodec"
2764 vp9_vaapi_hwaccel_deps="vaapi VADecPictureParameterBufferVP9_bit_depth"
2765 vp9_vaapi_hwaccel_select="vp9_decoder"
2766 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2767 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2768 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2769 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2770 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2771
2772 # hardware-accelerated codecs
2773 omx_deps="dlopen pthreads"
2774 omx_extralibs='$ldl'
2775 omx_rpi_select="omx"
2776 qsvdec_select="qsv"
2777 qsvenc_select="qsv"
2778 vaapi_encode_deps="vaapi"
2779 v4l2_m2m_deps_any="linux_videodev2_h"
2780
2781 hwupload_cuda_filter_deps="cuda"
2782 scale_npp_filter_deps="cuda libnpp"
2783 scale_cuda_filter_deps="cuda_sdk"
2784 thumbnail_cuda_filter_deps="cuda_sdk"
2785
2786 nvenc_deps="cuda"
2787 nvenc_deps_any="dlopen LoadLibrary"
2788 nvenc_encoder_deps="nvenc"
2789
2790 h263_v4l2m2m_decoder_deps="v4l2_m2m h263_v4l2_m2m"
2791 h263_v4l2m2m_encoder_deps="v4l2_m2m h263_v4l2_m2m"
2792 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2793 h264_cuvid_decoder_deps="cuda cuvid"
2794 h264_cuvid_decoder_select="h264_mp4toannexb_bsf"
2795 h264_mediacodec_decoder_deps="mediacodec"
2796 h264_mediacodec_decoder_select="h264_mp4toannexb_bsf h264_parser"
2797 h264_mmal_decoder_deps="mmal"
2798 h264_nvenc_encoder_deps="nvenc"
2799 h264_omx_encoder_deps="omx"
2800 h264_qsv_decoder_deps="libmfx"
2801 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2802 h264_qsv_encoder_deps="libmfx"
2803 h264_qsv_encoder_select="qsvenc"
2804 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2805 h264_vaapi_encoder_select="vaapi_encode golomb"
2806 h264_vda_decoder_deps="vda"
2807 h264_vda_decoder_select="h264_decoder"
2808 h264_vdpau_decoder_deps="vdpau"
2809 h264_vdpau_decoder_select="h264_decoder"
2810 h264_v4l2m2m_decoder_deps="v4l2_m2m h264_v4l2_m2m"
2811 h264_v4l2m2m_encoder_deps="v4l2_m2m h264_v4l2_m2m"
2812 hevc_cuvid_decoder_deps="cuda cuvid"
2813 hevc_cuvid_decoder_select="hevc_mp4toannexb_bsf"
2814 hevc_mediacodec_decoder_deps="mediacodec"
2815 hevc_mediacodec_decoder_select="hevc_mp4toannexb_bsf hevc_parser"
2816 hevc_nvenc_encoder_deps="nvenc"
2817 hevc_qsv_decoder_deps="libmfx"
2818 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
2819 hevc_qsv_encoder_deps="libmfx"
2820 hevc_qsv_encoder_select="hevcparse qsvenc"
2821 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2822 hevc_vaapi_encoder_select="vaapi_encode golomb"
2823 hevc_v4l2m2m_decoder_deps="v4l2_m2m hevc_v4l2_m2m"
2824 hevc_v4l2m2m_encoder_deps="v4l2_m2m hevc_v4l2_m2m"
2825 mjpeg_cuvid_decoder_deps="cuda cuvid"
2826 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2827 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2828 mpeg1_cuvid_decoder_deps="cuda cuvid"
2829 mpeg1_vdpau_decoder_deps="vdpau"
2830 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2831 mpeg1_v4l2m2m_decoder_deps="v4l2_m2m mpeg1_v4l2_m2m"
2832 mpeg2_crystalhd_decoder_select="crystalhd"
2833 mpeg2_cuvid_decoder_deps="cuda cuvid"
2834 mpeg2_mmal_decoder_deps="mmal"
2835 mpeg2_mediacodec_decoder_deps="mediacodec"
2836 mpeg2_qsv_decoder_deps="libmfx"
2837 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel"
2838 mpeg2_qsv_encoder_deps="libmfx"
2839 mpeg2_qsv_encoder_select="qsvenc"
2840 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2841 mpeg2_vaapi_encoder_select="vaapi_encode"
2842 mpeg2_v4l2m2m_decoder_deps="v4l2_m2m mpeg2_v4l2_m2m"
2843 mpeg4_crystalhd_decoder_select="crystalhd"
2844 mpeg4_cuvid_decoder_deps="cuda cuvid"
2845 mpeg4_mediacodec_decoder_deps="mediacodec"
2846 mpeg4_mmal_decoder_deps="mmal"
2847 mpeg4_omx_encoder_deps="omx"
2848 mpeg4_vdpau_decoder_deps="vdpau"
2849 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2850 mpeg4_v4l2m2m_decoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
2851 mpeg4_v4l2m2m_encoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
2852 mpeg_vdpau_decoder_deps="vdpau"
2853 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2854 msmpeg4_crystalhd_decoder_select="crystalhd"
2855 nvenc_h264_encoder_select="h264_nvenc_encoder"
2856 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2857 vc1_crystalhd_decoder_select="crystalhd"
2858 vc1_cuvid_decoder_deps="cuda cuvid"
2859 vc1_mmal_decoder_deps="mmal"
2860 vc1_vdpau_decoder_deps="vdpau"
2861 vc1_vdpau_decoder_select="vc1_decoder"
2862 vc1_v4l2m2m_decoder_deps="v4l2_m2m vc1_v4l2_m2m"
2863 vp8_cuvid_decoder_deps="cuda cuvid"
2864 vp8_mediacodec_decoder_deps="mediacodec"
2865 vp8_qsv_decoder_deps="libmfx"
2866 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2867 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2868 vp8_vaapi_encoder_select="vaapi_encode"
2869 vp8_v4l2m2m_decoder_deps="v4l2_m2m vp8_v4l2_m2m"
2870 vp8_v4l2m2m_encoder_deps="v4l2_m2m vp8_v4l2_m2m"
2871 vp9_cuvid_decoder_deps="cuda cuvid"
2872 vp9_mediacodec_decoder_deps="mediacodec"
2873 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2874 vp9_vaapi_encoder_select="vaapi_encode"
2875 vp9_v4l2m2m_decoder_deps="v4l2_m2m vp9_v4l2_m2m"
2876 wmv3_crystalhd_decoder_select="crystalhd"
2877 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2878
2879 # parsers
2880 h264_parser_select="golomb h264dsp h264parse"
2881 hevc_parser_select="hevcparse"
2882 mpegaudio_parser_select="mpegaudioheader"
2883 mpegvideo_parser_select="mpegvideo"
2884 mpeg4video_parser_select="h263dsp mpegvideo qpeldsp"
2885 vc1_parser_select="vc1dsp"
2886
2887 # bitstream_filters
2888 mjpeg2jpeg_bsf_select="jpegtables"
2889
2890 # external libraries
2891 aac_at_decoder_deps="audiotoolbox"
2892 ac3_at_decoder_deps="audiotoolbox"
2893 ac3_at_decoder_select="ac3_parser"
2894 adpcm_ima_qt_at_decoder_deps="audiotoolbox"
2895 alac_at_decoder_deps="audiotoolbox"
2896 amr_nb_at_decoder_deps="audiotoolbox"
2897 avisynth_deps_any="dlopen LoadLibrary"
2898 avisynth_demuxer_deps="avisynth"
2899 avisynth_demuxer_select="riffdec"
2900 eac3_at_decoder_deps="audiotoolbox"
2901 eac3_at_decoder_select="ac3_parser"
2902 gsm_ms_at_decoder_deps="audiotoolbox"
2903 ilbc_at_decoder_deps="audiotoolbox"
2904 mp1_at_decoder_deps="audiotoolbox"
2905 mp2_at_decoder_deps="audiotoolbox"
2906 mp3_at_decoder_deps="audiotoolbox"
2907 mp1_at_decoder_select="mpegaudioheader"
2908 mp2_at_decoder_select="mpegaudioheader"
2909 mp3_at_decoder_select="mpegaudioheader"
2910 pcm_alaw_at_decoder_deps="audiotoolbox"
2911 pcm_mulaw_at_decoder_deps="audiotoolbox"
2912 qdmc_at_decoder_deps="audiotoolbox"
2913 qdm2_at_decoder_deps="audiotoolbox"
2914 aac_at_encoder_deps="audiotoolbox"
2915 aac_at_encoder_select="audio_frame_queue"
2916 alac_at_encoder_deps="audiotoolbox"
2917 alac_at_encoder_select="audio_frame_queue"
2918 ilbc_at_encoder_deps="audiotoolbox"
2919 ilbc_at_encoder_select="audio_frame_queue"
2920 pcm_alaw_at_encoder_deps="audiotoolbox"
2921 pcm_alaw_at_encoder_select="audio_frame_queue"
2922 pcm_mulaw_at_encoder_deps="audiotoolbox"
2923 pcm_mulaw_at_encoder_select="audio_frame_queue"
2924 chromaprint_muxer_deps="chromaprint"
2925 h264_videotoolbox_encoder_deps="videotoolbox_encoder pthreads"
2926 libcelt_decoder_deps="libcelt"
2927 libfdk_aac_decoder_deps="libfdk_aac"
2928 libfdk_aac_encoder_deps="libfdk_aac"
2929 libfdk_aac_encoder_select="audio_frame_queue"
2930 libgme_demuxer_deps="libgme"
2931 libgsm_decoder_deps="libgsm"
2932 libgsm_encoder_deps="libgsm"
2933 libgsm_ms_decoder_deps="libgsm"
2934 libgsm_ms_encoder_deps="libgsm"
2935 libilbc_decoder_deps="libilbc"
2936 libilbc_encoder_deps="libilbc"
2937 libkvazaar_encoder_deps="libkvazaar"
2938 libmodplug_demuxer_deps="libmodplug"
2939 libmp3lame_encoder_deps="libmp3lame"
2940 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2941 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2942 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2943 libopencore_amrnb_encoder_select="audio_frame_queue"
2944 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2945 libopenh264_decoder_deps="libopenh264"
2946 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2947 libopenh264_encoder_deps="libopenh264"
2948 libopenjpeg_decoder_deps="libopenjpeg"
2949 libopenjpeg_encoder_deps="libopenjpeg"
2950 libopenmpt_demuxer_deps="libopenmpt"
2951 libopus_decoder_deps="libopus"
2952 libopus_encoder_deps="libopus"
2953 libopus_encoder_select="audio_frame_queue"
2954 librsvg_decoder_deps="librsvg"
2955 libshine_encoder_deps="libshine"
2956 libshine_encoder_select="audio_frame_queue"
2957 libspeex_decoder_deps="libspeex"
2958 libspeex_encoder_deps="libspeex"
2959 libspeex_encoder_select="audio_frame_queue"
2960 libtheora_encoder_deps="libtheora"
2961 libtwolame_encoder_deps="libtwolame"
2962 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2963 libvorbis_decoder_deps="libvorbis"
2964 libvorbis_encoder_deps="libvorbis"
2965 libvorbis_encoder_select="audio_frame_queue"
2966 libvpx_vp8_decoder_deps="libvpx"
2967 libvpx_vp8_encoder_deps="libvpx"
2968 libvpx_vp9_decoder_deps="libvpx"
2969 libvpx_vp9_encoder_deps="libvpx"
2970 libwavpack_encoder_deps="libwavpack"
2971 libwavpack_encoder_select="audio_frame_queue"
2972 libwebp_encoder_deps="libwebp"
2973 libwebp_anim_encoder_deps="libwebp"
2974 libx262_encoder_deps="libx262"
2975 libx264_encoder_deps="libx264"
2976 libx264rgb_encoder_deps="libx264 x264_csp_bgr"
2977 libx264rgb_encoder_select="libx264_encoder"
2978 libx265_encoder_deps="libx265"
2979 libxavs_encoder_deps="libxavs"
2980 libxvid_encoder_deps="libxvid"
2981 libzvbi_teletext_decoder_deps="libzvbi"
2982 videotoolbox_extralibs="-framework CoreFoundation -framework VideoToolbox -framework CoreMedia -framework CoreVideo"
2983 videotoolbox_encoder_deps="videotoolbox VTCompressionSessionPrepareToEncodeFrames"
2984 videotoolbox_encoder_suggest="vda_framework"
2985
2986 # demuxers / muxers
2987 ac3_demuxer_select="ac3_parser"
2988 aiff_muxer_select="iso_media"
2989 asf_demuxer_select="riffdec"
2990 asf_o_demuxer_select="riffdec"
2991 asf_muxer_select="riffenc"
2992 asf_stream_muxer_select="asf_muxer"
2993 avi_demuxer_select="iso_media riffdec exif"
2994 avi_muxer_select="riffenc"
2995 caf_demuxer_select="iso_media riffdec"
2996 caf_muxer_select="iso_media"
2997 dash_muxer_select="mp4_muxer"
2998 dash_demuxer_deps="libxml2"
2999 dirac_demuxer_select="dirac_parser"
3000 dts_demuxer_select="dca_parser"
3001 dtshd_demuxer_select="dca_parser"
3002 dv_demuxer_select="dvprofile"
3003 dv_muxer_select="dvprofile"
3004 dxa_demuxer_select="riffdec"
3005 eac3_demuxer_select="ac3_parser"
3006 f4v_muxer_select="mov_muxer"
3007 fifo_muxer_deps="threads"
3008 flac_demuxer_select="flac_parser"
3009 hds_muxer_select="flv_muxer"
3010 hls_muxer_select="mpegts_muxer"
3011 image2_alias_pix_demuxer_select="image2_demuxer"
3012 image2_brender_pix_demuxer_select="image2_demuxer"
3013 ipod_muxer_select="mov_muxer"
3014 ismv_muxer_select="mov_muxer"
3015 matroska_audio_muxer_select="matroska_muxer"
3016 matroska_demuxer_select="iso_media riffdec"
3017 matroska_demuxer_suggest="bzlib lzo zlib"
3018 matroska_muxer_select="iso_media riffenc"
3019 mmf_muxer_select="riffenc"
3020 mov_demuxer_select="iso_media riffdec"
3021 mov_demuxer_suggest="zlib"
3022 mov_muxer_select="iso_media riffenc rtpenc_chain"
3023 mp3_demuxer_select="mpegaudio_parser"
3024 mp3_muxer_select="mpegaudioheader"
3025 mp4_muxer_select="mov_muxer"
3026 mpegts_demuxer_select="iso_media"
3027 mpegts_muxer_select="adts_muxer latm_muxer"
3028 mpegtsraw_demuxer_select="mpegts_demuxer"
3029 mxf_d10_muxer_select="mxf_muxer"
3030 mxf_opatom_muxer_select="mxf_muxer"
3031 nut_muxer_select="riffenc"
3032 nuv_demuxer_select="riffdec"
3033 oga_muxer_select="ogg_muxer"
3034 ogg_demuxer_select="dirac_parse"
3035 ogv_muxer_select="ogg_muxer"
3036 opus_muxer_select="ogg_muxer"
3037 psp_muxer_select="mov_muxer"
3038 rtp_demuxer_select="sdp_demuxer"
3039 rtp_muxer_select="golomb"
3040 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
3041 rtsp_demuxer_select="http_protocol rtpdec"
3042 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
3043 sap_demuxer_select="sdp_demuxer"
3044 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
3045 sdp_demuxer_select="rtpdec"
3046 smoothstreaming_muxer_select="ismv_muxer"
3047 spdif_muxer_select="aac_parser"
3048 spx_muxer_select="ogg_muxer"
3049 swf_demuxer_suggest="zlib"
3050 tak_demuxer_select="tak_parser"
3051 tg2_muxer_select="mov_muxer"
3052 tgp_muxer_select="mov_muxer"
3053 vobsub_demuxer_select="mpegps_demuxer"
3054 w64_demuxer_select="wav_demuxer"
3055 w64_muxer_select="wav_muxer"
3056 wav_demuxer_select="riffdec"
3057 wav_muxer_select="riffenc"
3058 webm_muxer_select="iso_media riffenc"
3059 webm_dash_manifest_demuxer_select="matroska_demuxer"
3060 wtv_demuxer_select="mpegts_demuxer riffdec"
3061 wtv_muxer_select="mpegts_muxer riffenc"
3062 xmv_demuxer_select="riffdec"
3063 xwma_demuxer_select="riffdec"
3064
3065 # indevs / outdevs
3066 alsa_indev_deps="alsa"
3067 alsa_outdev_deps="alsa"
3068 avfoundation_indev_deps="avfoundation pthreads"
3069 avfoundation_indev_extralibs="-framework Foundation -framework CoreVideo -framework CoreMedia"
3070 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
3071 caca_outdev_deps="libcaca"
3072 decklink_indev_deps="decklink threads"
3073 decklink_indev_extralibs="-lstdc++"
3074 decklink_outdev_deps="decklink threads"
3075 decklink_outdev_extralibs="-lstdc++"
3076 libndi_newtek_indev_deps="libndi_newtek"
3077 libndi_newtek_indev_extralibs="-lndi"
3078 libndi_newtek_outdev_deps="libndi_newtek"
3079 libndi_newtek_outdev_extralibs="-lndi"
3080 dshow_indev_deps="IBaseFilter"
3081 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi"
3082 fbdev_indev_deps="linux_fb_h"
3083 fbdev_outdev_deps="linux_fb_h"
3084 gdigrab_indev_deps="CreateDIBSection"
3085 gdigrab_indev_extralibs="-lgdi32"
3086 gdigrab_indev_select="bmp_decoder"
3087 iec61883_indev_deps="libiec61883"
3088 jack_indev_deps="jack"
3089 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
3090 kmsgrab_indev_deps="libdrm"
3091 lavfi_indev_deps="avfilter"
3092 libcdio_indev_deps="libcdio"
3093 libdc1394_indev_deps="libdc1394"
3094 libv4l2_indev_deps="libv4l2"
3095 openal_indev_deps="openal"
3096 opengl_outdev_deps="opengl"
3097 oss_indev_deps_any="soundcard_h sys_soundcard_h"
3098 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
3099 pulse_indev_deps="libpulse"
3100 pulse_outdev_deps="libpulse"
3101 sdl2_outdev_deps="sdl2"
3102 sndio_indev_deps="sndio"
3103 sndio_outdev_deps="sndio"
3104 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
3105 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
3106 vfwcap_indev_deps="vfw32 vfwcap_defines"
3107 xcbgrab_indev_deps="libxcb"
3108 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
3109 xv_outdev_extralibs="-lXv -lX11 -lXext"
3110
3111 # protocols
3112 async_protocol_deps="threads"
3113 bluray_protocol_deps="libbluray"
3114 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
3115 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
3116 ffrtmpcrypt_protocol_select="tcp_protocol"
3117 ffrtmphttp_protocol_deps="!librtmp_protocol"
3118 ffrtmphttp_protocol_select="http_protocol"
3119 ftp_protocol_select="tcp_protocol"
3120 gopher_protocol_select="network"
3121 http_protocol_select="tcp_protocol"
3122 httpproxy_protocol_select="tcp_protocol"
3123 https_protocol_select="tls_protocol"
3124 icecast_protocol_select="http_protocol"
3125 librtmp_protocol_deps="librtmp"
3126 librtmpe_protocol_deps="librtmp"
3127 librtmps_protocol_deps="librtmp"
3128 librtmpt_protocol_deps="librtmp"
3129 librtmpte_protocol_deps="librtmp"
3130 libsmbclient_protocol_deps="libsmbclient gplv3"
3131 libssh_protocol_deps="libssh"
3132 mmsh_protocol_select="http_protocol"
3133 mmst_protocol_select="network"
3134 rtmp_protocol_deps="!librtmp_protocol"
3135 rtmp_protocol_select="tcp_protocol"
3136 rtmpe_protocol_select="ffrtmpcrypt_protocol"
3137 rtmps_protocol_deps="!librtmp_protocol"
3138 rtmps_protocol_select="tls_protocol"
3139 rtmpt_protocol_select="ffrtmphttp_protocol"
3140 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
3141 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
3142 rtp_protocol_select="udp_protocol"
3143 sctp_protocol_deps="struct_sctp_event_subscribe struct_msghdr_msg_flags"
3144 sctp_protocol_select="network"
3145 srtp_protocol_select="rtp_protocol srtp"
3146 tcp_protocol_select="network"
3147 tls_gnutls_protocol_deps="gnutls !tls_schannel_protocol !tls_securetransport_protocol"
3148 tls_gnutls_protocol_select="tcp_protocol"
3149 tls_openssl_protocol_deps="openssl !tls_schannel_protocol !tls_securetransport_protocol !tls_gnutls_protocol"
3150 tls_openssl_protocol_select="tcp_protocol"
3151 tls_schannel_protocol_deps="schannel"
3152 tls_schannel_protocol_select="tcp_protocol"
3153 tls_securetransport_protocol_deps="securetransport"
3154 tls_securetransport_protocol_select="tcp_protocol"
3155 tls_protocol_deps_any="tls_schannel_protocol tls_securetransport_protocol tls_gnutls_protocol tls_openssl_protocol"
3156 udp_protocol_select="network"
3157 udplite_protocol_select="network"
3158 unix_protocol_deps="sys_un_h"
3159 unix_protocol_select="network"
3160
3161 # filters
3162 afftfilt_filter_deps="avcodec"
3163 afftfilt_filter_select="fft"
3164 afir_filter_deps="avcodec"
3165 afir_filter_select="fft"
3166 amovie_filter_deps="avcodec avformat"
3167 aresample_filter_deps="swresample"
3168 ass_filter_deps="libass"
3169 atempo_filter_deps="avcodec"
3170 atempo_filter_select="rdft"
3171 azmq_filter_deps="libzmq"
3172 blackframe_filter_deps="gpl"
3173 boxblur_filter_deps="gpl"
3174 bs2b_filter_deps="libbs2b"
3175 colormatrix_filter_deps="gpl"
3176 coreimage_filter_deps="coreimage appkit"
3177 coreimage_filter_extralibs="-framework OpenGL"
3178 coreimagesrc_filter_deps="coreimage appkit"
3179 coreimagesrc_filter_extralibs="-framework OpenGL"
3180 cover_rect_filter_deps="avcodec avformat gpl"
3181 cropdetect_filter_deps="gpl"
3182 deinterlace_qsv_filter_deps="libmfx"
3183 deinterlace_vaapi_filter_deps="vaapi"
3184 delogo_filter_deps="gpl"
3185 deshake_filter_select="pixelutils"
3186 drawtext_filter_deps="libfreetype"
3187 elbg_filter_deps="avcodec"
3188 eq_filter_deps="gpl"
3189 fftfilt_filter_deps="avcodec"
3190 fftfilt_filter_select="rdft"
3191 find_rect_filter_deps="avcodec avformat gpl"
3192 firequalizer_filter_deps="avcodec"
3193 firequalizer_filter_select="rdft"
3194 flite_filter_deps="libflite"
3195 framerate_filter_select="pixelutils"
3196 frei0r_filter_deps="frei0r dlopen"
3197 frei0r_src_filter_deps="frei0r dlopen"
3198 fspp_filter_deps="gpl"
3199 geq_filter_deps="gpl"
3200 histeq_filter_deps="gpl"
3201 hqdn3d_filter_deps="gpl"
3202 interlace_filter_deps="gpl"
3203 kerndeint_filter_deps="gpl"
3204 ladspa_filter_deps="ladspa dlopen"
3205 mcdeint_filter_deps="avcodec gpl"
3206 movie_filter_deps="avcodec avformat"
3207 mpdecimate_filter_deps="gpl"
3208 mpdecimate_filter_select="pixelutils"
3209 mptestsrc_filter_deps="gpl"
3210 negate_filter_deps="lut_filter"
3211 nnedi_filter_deps="gpl"
3212 ocr_filter_deps="libtesseract"
3213 ocv_filter_deps="libopencv"
3214 owdenoise_filter_deps="gpl"
3215 pan_filter_deps="swresample"
3216 perspective_filter_deps="gpl"
3217 phase_filter_deps="gpl"
3218 pp7_filter_deps="gpl"
3219 pp_filter_deps="gpl postproc"
3220 pullup_filter_deps="gpl"
3221 removelogo_filter_deps="avcodec avformat swscale"
3222 repeatfields_filter_deps="gpl"
3223 resample_filter_deps="avresample"
3224 rubberband_filter_deps="librubberband"
3225 sab_filter_deps="gpl swscale"
3226 scale2ref_filter_deps="swscale"
3227 scale_filter_deps="swscale"
3228 scale_qsv_filter_deps="libmfx"
3229 select_filter_select="pixelutils"
3230 showcqt_filter_deps="avcodec avformat swscale"
3231 showcqt_filter_select="fft"
3232 showfreqs_filter_deps="avcodec"
3233 showfreqs_filter_select="fft"
3234 showspectrum_filter_deps="avcodec"
3235 showspectrum_filter_select="fft"
3236 showspectrumpic_filter_deps="avcodec"
3237 showspectrumpic_filter_select="fft"
3238 signature_filter_deps="gpl avcodec avformat"
3239 smartblur_filter_deps="gpl swscale"
3240 sofalizer_filter_deps="libmysofa avcodec"
3241 sofalizer_filter_select="fft"
3242 spectrumsynth_filter_deps="avcodec"
3243 spectrumsynth_filter_select="fft"
3244 spp_filter_deps="gpl avcodec"
3245 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
3246 stereo3d_filter_deps="gpl"
3247 subtitles_filter_deps="avformat avcodec libass"
3248 super2xsai_filter_deps="gpl"
3249 pixfmts_super2xsai_test_deps="super2xsai_filter"
3250 tinterlace_filter_deps="gpl"
3251 tinterlace_merge_test_deps="tinterlace_filter"
3252 tinterlace_pad_test_deps="tinterlace_filter"
3253 tonemap_filter_deps="const_nan"
3254 uspp_filter_deps="gpl avcodec"
3255 vaguedenoiser_filter_deps="gpl"
3256 vidstabdetect_filter_deps="libvidstab"
3257 vidstabtransform_filter_deps="libvidstab"
3258 libvmaf_filter_deps="libvmaf"
3259 zmq_filter_deps="libzmq"
3260 zoompan_filter_deps="swscale"
3261 zscale_filter_deps="libzimg const_nan"
3262 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
3263
3264 # examples
3265 avio_dir_cmd_deps="avformat avutil"
3266 avio_reading_deps="avformat avcodec avutil"
3267 decode_audio_example_deps="avcodec avutil"
3268 decode_video_example_deps="avcodec avutil"
3269 demuxing_decoding_example_deps="avcodec avformat avutil"
3270 encode_audio_example_deps="avcodec avutil"
3271 encode_video_example_deps="avcodec avutil"
3272 extract_mvs_example_deps="avcodec avformat avutil"
3273 filter_audio_example_deps="avfilter avutil"
3274 filtering_audio_example_deps="avfilter avcodec avformat avutil"
3275 filtering_video_example_deps="avfilter avcodec avformat avutil"
3276 http_multiclient_example_deps="avformat avutil fork"
3277 hw_decode_example_deps="avcodec avformat avutil"
3278 metadata_example_deps="avformat avutil"
3279 muxing_example_deps="avcodec avformat avutil swscale"
3280 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
3281 remuxing_example_deps="avcodec avformat avutil"
3282 resampling_audio_example_deps="avutil swresample"
3283 scaling_video_example_deps="avutil swscale"
3284 transcode_aac_example_deps="avcodec avformat swresample"
3285 transcoding_example_deps="avfilter avcodec avformat avutil"
3286
3287 # libraries, in linking order
3288 avcodec_deps="avutil"
3289 avcodec_select="null_bsf"
3290 avdevice_deps="avformat avcodec avutil"
3291 avfilter_deps="avutil"
3292 avformat_deps="avcodec avutil"
3293 avformat_suggest="network"
3294 avresample_deps="avutil"
3295 postproc_deps="avutil gpl"
3296 swresample_deps="avutil"
3297 swscale_deps="avutil"
3298
3299 # programs
3300 ffmpeg_deps="avcodec avfilter avformat swresample"
3301 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
3302                null_filter
3303                trim_filter"
3304 ffplay_deps="avcodec avformat swscale swresample sdl2"
3305 ffplay_extralibs='$sdl2_extralibs'
3306 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
3307 ffprobe_deps="avcodec avformat"
3308 ffserver_deps="avformat fork sarestart"
3309 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
3310
3311 # documentation
3312 podpages_deps="perl"
3313 manpages_deps="perl pod2man"
3314 htmlpages_deps="perl"
3315 htmlpages_deps_any="makeinfo_html texi2html"
3316 txtpages_deps="perl makeinfo"
3317 doc_deps_any="manpages htmlpages podpages txtpages"
3318
3319 # default parameters
3320
3321 logfile="ffbuild/config.log"
3322
3323 # installation paths
3324 prefix_default="/usr/local"
3325 bindir_default='${prefix}/bin'
3326 datadir_default='${prefix}/share/ffmpeg'
3327 docdir_default='${prefix}/share/doc/ffmpeg'
3328 incdir_default='${prefix}/include'
3329 libdir_default='${prefix}/lib'
3330 mandir_default='${prefix}/share/man'
3331
3332 # toolchain
3333 ar_default="ar"
3334 cc_default="gcc"
3335 cxx_default="g++"
3336 host_cc_default="gcc"
3337 doxygen_default="doxygen"
3338 install="install"
3339 ln_s_default="ln -s -f"
3340 nm_default="nm -g"
3341 pkg_config_default=pkg-config
3342 ranlib_default="ranlib"
3343 strip_default="strip"
3344 version_script='--version-script'
3345 x86asmexe_default="nasm"
3346 windres_default="windres"
3347 nvcc_default="nvcc"
3348 nvccflags_default="-gencode arch=compute_30,code=sm_30 -O2"
3349
3350 # OS
3351 target_os_default=$(tolower $(uname -s))
3352 host_os=$target_os_default
3353
3354 # machine
3355 if test "$target_os_default" = aix; then
3356     arch_default=$(uname -p)
3357     strip_default="strip -X32_64"
3358 else
3359     arch_default=$(uname -m)
3360 fi
3361 cpu="generic"
3362 intrinsics="none"
3363
3364 # configurable options
3365 enable $PROGRAM_LIST
3366 enable $DOCUMENT_LIST
3367 enable $EXAMPLE_LIST
3368 enable $(filter_out avresample $LIBRARY_LIST)
3369 enable stripping
3370
3371 enable asm
3372 enable debug
3373 enable doc
3374 enable faan faandct faanidct
3375 enable optimizations
3376 enable runtime_cpudetect
3377 enable safe_bitstream_reader
3378 enable static
3379 enable swscale_alpha
3380 enable valgrind_backtrace
3381
3382 sws_max_filter_size_default=256
3383 set_default sws_max_filter_size
3384
3385 # build settings
3386 SHFLAGS='-shared -Wl,-soname,$$(@F)'
3387 LIBPREF="lib"
3388 LIBSUF=".a"
3389 FULLNAME='$(NAME)$(BUILDSUF)'
3390 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
3391 SLIBPREF="lib"
3392 SLIBSUF=".so"
3393 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
3394 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
3395 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
3396 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
3397 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
3398 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
3399 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
3400
3401 asflags_filter=echo
3402 cflags_filter=echo
3403 ldflags_filter=echo
3404
3405 AS_C='-c'
3406 AS_O='-o $@'
3407 CC_C='-c'
3408 CC_E='-E -o $@'
3409 CC_O='-o $@'
3410 CXX_C='-c'
3411 CXX_O='-o $@'
3412 OBJCC_C='-c'
3413 OBJCC_E='-E -o $@'
3414 OBJCC_O='-o $@'
3415 X86ASM_O='-o $@'
3416 LD_O='-o $@'
3417 LD_LIB='-l%'
3418 LD_PATH='-L'
3419 HOSTCC_C='-c'
3420 HOSTCC_E='-E -o $@'
3421 HOSTCC_O='-o $@'
3422 HOSTLD_O='-o $@'
3423 NVCC_C='-c'
3424 NVCC_O='-o $@'
3425
3426 host_extralibs='-lm'
3427 host_cflags_filter=echo
3428 host_ldflags_filter=echo
3429
3430 target_path='$(CURDIR)'
3431
3432 # since the object filename is not given with the -MM flag, the compiler
3433 # is only able to print the basename, and we must add the path ourselves
3434 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(@F),$(@D)/$(@F)," > $(@:.o=.d)'
3435 DEPFLAGS='-MM'
3436
3437 mkdir -p ffbuild
3438
3439 # find source path
3440 if test -f configure; then
3441     source_path=.
3442 else
3443     source_path=$(cd $(dirname "$0"); pwd)
3444     case "$source_path" in
3445         *[[:blank:]]*) die "Out of tree builds are impossible with whitespace in source path." ;;
3446     esac
3447     test -e "$source_path/config.h" &&
3448         die "Out of tree builds are impossible with config.h in source dir."
3449 fi
3450
3451 for v in "$@"; do
3452     r=${v#*=}
3453     l=${v%"$r"}
3454     r=$(sh_quote "$r")
3455     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
3456 done
3457
3458 find_things(){
3459     thing=$1
3460     pattern=$2
3461     file=$source_path/$3
3462     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
3463 }
3464
3465 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
3466 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
3467 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
3468 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
3469 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
3470 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
3471 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
3472 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
3473 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
3474
3475 find_things_extern(){
3476     thing=$1
3477     pattern=$2
3478     file=$source_path/$3
3479     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
3480 }
3481
3482 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
3483 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
3484
3485 ALL_COMPONENTS="
3486     $BSF_LIST
3487     $DECODER_LIST
3488     $DEMUXER_LIST
3489     $ENCODER_LIST
3490     $FILTER_LIST
3491     $HWACCEL_LIST
3492     $INDEV_LIST
3493     $MUXER_LIST
3494     $OUTDEV_LIST
3495     $PARSER_LIST
3496     $PROTOCOL_LIST
3497 "
3498
3499 for n in $COMPONENT_LIST; do
3500     v=$(toupper ${n%s})_LIST
3501     eval enable \$$v
3502     eval ${n}_if_any="\$$v"
3503 done
3504
3505 enable $ARCH_EXT_LIST
3506
3507 die_unknown(){
3508     echo "Unknown option \"$1\"."
3509     echo "See $0 --help for available options."
3510     exit 1
3511 }
3512
3513 print_in_columns() {
3514     cols=$(expr $ncols / 24)
3515     cat | tr ' ' '\n' | sort | pr -r "-$cols" -w $ncols -t
3516 }
3517
3518 show_list() {
3519     suffix=_$1
3520     shift
3521     echo $* | sed s/$suffix//g | print_in_columns
3522     exit 0
3523 }
3524
3525 rand_list(){
3526     IFS=', '
3527     set -- $*
3528     unset IFS
3529     for thing; do
3530         comp=${thing%:*}
3531         prob=${thing#$comp}
3532         prob=${prob#:}
3533         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
3534         echo "prob ${prob:-0.5}"
3535         printf '%s\n' $comp
3536     done
3537 }
3538
3539 do_random(){
3540     action=$1
3541     shift
3542     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
3543     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
3544 }
3545
3546 for opt do
3547     optval="${opt#*=}"
3548     case "$opt" in
3549         --extra-ldflags=*)
3550             add_ldflags $optval
3551         ;;
3552         --extra-ldexeflags=*)
3553             add_ldexeflags $optval
3554         ;;
3555         --extra-ldlibflags=*)
3556             add_ldlibflags $optval
3557         ;;
3558         --extra-libs=*)
3559             add_extralibs $optval
3560         ;;
3561         --disable-devices)
3562             disable $INDEV_LIST $OUTDEV_LIST
3563         ;;
3564         --enable-debug=*)
3565             debuglevel="$optval"
3566         ;;
3567         --disable-programs)
3568             disable $PROGRAM_LIST
3569         ;;
3570         --disable-everything)
3571             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3572         ;;
3573         --disable-all)
3574             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3575             disable $LIBRARY_LIST $PROGRAM_LIST doc
3576             enable avutil
3577         ;;
3578         --enable-random|--disable-random)
3579             action=${opt%%-random}
3580             do_random ${action#--} $COMPONENT_LIST
3581         ;;
3582         --enable-random=*|--disable-random=*)
3583             action=${opt%%-random=*}
3584             do_random ${action#--} $optval
3585         ;;
3586         --enable-sdl)
3587             enable sdl2
3588         ;;
3589         --enable-*=*|--disable-*=*)
3590             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
3591             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
3592             eval list=\$$(toupper $thing)_LIST
3593             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
3594             list=$(filter "$name" $list)
3595             [ "$list" = "" ] && warn "Option $opt did not match anything"
3596             $action $list
3597         ;;
3598         --enable-yasm|--disable-yasm)
3599             warn "The ${opt} option is only provided for compatibility and will be\n"\
3600                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
3601             test $opt = --enable-yasm && x86asm=yes || x86asm=no
3602         ;;
3603         --yasmexe=*)
3604             warn "The --yasmexe option is only provided for compatibility and will be\n"\
3605                  "removed in the future. Use --x86asmexe instead."
3606             x86asmexe="$optval"
3607         ;;
3608         --enable-?*|--disable-?*)
3609             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
3610             if is_in $option $COMPONENT_LIST; then
3611                 test $action = disable && action=unset
3612                 eval $action \$$(toupper ${option%s})_LIST
3613             elif is_in $option $CMDLINE_SELECT; then
3614                 $action $option
3615             else
3616                 die_unknown $opt
3617             fi
3618         ;;
3619         --list-*)
3620             NAME="${opt#--list-}"
3621             is_in $NAME $COMPONENT_LIST || die_unknown $opt
3622             NAME=${NAME%s}
3623             eval show_list $NAME \$$(toupper $NAME)_LIST
3624         ;;
3625         --help|-h) show_help
3626         ;;
3627         --quiet|-q) quiet=yes
3628         ;;
3629         --fatal-warnings) enable fatal_warnings
3630         ;;
3631         --libfuzzer=*)
3632             libfuzzer_path="$optval"
3633         ;;
3634         *)
3635             optname="${opt%%=*}"
3636             optname="${optname#--}"
3637             optname=$(echo "$optname" | sed 's/-/_/g')
3638             if is_in $optname $CMDLINE_SET; then
3639                 eval $optname='$optval'
3640             elif is_in $optname $CMDLINE_APPEND; then
3641                 append $optname "$optval"
3642             else
3643                 die_unknown $opt
3644             fi
3645         ;;
3646     esac
3647 done
3648
3649 for e in $env; do
3650     eval "export $e"
3651 done
3652
3653 if disabled autodetect; then
3654
3655     # Unless iconv is explicitely disabled by the user, we still want to probe
3656     # for the iconv from the libc.
3657     disabled iconv || enable libc_iconv
3658
3659     disable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
3660     disable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
3661 fi
3662 # Mark specifically enabled, but normally autodetected libraries as requested.
3663 for lib in $AUTODETECT_LIBS; do
3664     enabled $lib && request $lib
3665 done
3666 #TODO: switch to $AUTODETECT_LIBS when $THREADS_LIST is supported the same way
3667 enable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
3668 enable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
3669
3670 disabled logging && logfile=/dev/null
3671
3672 die_license_disabled() {
3673     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
3674 }
3675
3676 die_license_disabled_gpl() {
3677     enabled $1 || { enabled $v && die "$v is incompatible with the gpl and --enable-$1 is not specified."; }
3678 }
3679
3680 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
3681 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
3682
3683 enabled gpl && map "die_license_disabled_gpl nonfree" $EXTERNAL_LIBRARY_NONFREE_LIST
3684 map "die_license_disabled nonfree" $HWACCEL_LIBRARY_NONFREE_LIST
3685
3686 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3687
3688 # Disable all the library-specific components if the library itself
3689 # is disabled, see AVCODEC_LIST and following _LIST variables.
3690
3691 disable_components(){
3692     disabled ${1} && disable $(
3693         eval components="\$$(toupper ${1})_COMPONENTS"
3694         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
3695     )
3696 }
3697
3698 map 'disable_components $v' $LIBRARY_LIST
3699
3700 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
3701 set >> $logfile
3702
3703 test -n "$valgrind" && toolchain="valgrind-memcheck"
3704
3705 enabled ossfuzz && {
3706     add_cflags  -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp -fno-omit-frame-pointer
3707     add_ldflags -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp
3708 }
3709
3710 case "$toolchain" in
3711     *-asan)
3712         cc_default="${toolchain%-asan}"
3713         add_cflags  -fsanitize=address
3714         add_ldflags -fsanitize=address
3715     ;;
3716     *-msan)
3717         cc_default="${toolchain%-msan}"
3718         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
3719         add_ldflags -fsanitize=memory
3720     ;;
3721     *-tsan)
3722         cc_default="${toolchain%-tsan}"
3723         add_cflags  -fsanitize=thread -fPIE
3724         add_ldflags -fsanitize=thread -pie
3725         case "$toolchain" in
3726             gcc-tsan)
3727                 add_cflags  -fPIC
3728                 add_ldflags -fPIC
3729                 ;;
3730         esac
3731     ;;
3732     *-usan)
3733         cc_default="${toolchain%-usan}"
3734         add_cflags  -fsanitize=undefined
3735         add_ldflags -fsanitize=undefined
3736     ;;
3737     valgrind-*)
3738         target_exec_default="valgrind"
3739         case "$toolchain" in
3740             valgrind-massif)
3741                 target_exec_args="--tool=massif --alloc-fn=av_malloc --alloc-fn=av_mallocz --alloc-fn=av_calloc --alloc-fn=av_fast_padded_malloc --alloc-fn=av_fast_malloc --alloc-fn=av_realloc_f --alloc-fn=av_fast_realloc --alloc-fn=av_realloc"
3742                 ;;
3743             valgrind-memcheck)
3744                 target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3745                 ;;
3746         esac
3747     ;;
3748     msvc)
3749         # Check whether the current MSVC version needs the C99 converter.
3750         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3751         # support enough of C99 to build ffmpeg. Default to the new
3752         # behaviour if the regexp was unable to match anything, since this
3753         # successfully parses the version number of existing supported
3754         # versions that require the converter (MSVC 2010 and 2012).
3755         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3756         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3757             cc_default="cl"
3758             cxx_default="cl"
3759         else
3760             cc_default="c99wrap cl"
3761             cxx_default="c99wrap cl"
3762         fi
3763         ld_default="$source_path/compat/windows/mslink"
3764         nm_default="dumpbin -symbols"
3765         ar_default="lib"
3766         case "$arch" in
3767         arm*)
3768             as_default="armasm"
3769             ;;
3770         esac
3771         target_os_default="win32"
3772         # Use a relative path for TMPDIR. This makes sure all the
3773         # ffconf temp files are written with a relative path, avoiding
3774         # issues with msys/win32 path conversion for MSVC parameters
3775         # such as -Fo<file> or -out:<file>.
3776         TMPDIR=.
3777     ;;
3778     icl)
3779         cc_default="icl"
3780         ld_default="xilink"
3781         nm_default="dumpbin -symbols"
3782         ar_default="xilib"
3783         target_os_default="win32"
3784         TMPDIR=.
3785     ;;
3786     gcov)
3787         add_cflags  -fprofile-arcs -ftest-coverage
3788         add_ldflags -fprofile-arcs -ftest-coverage
3789     ;;
3790     llvm-cov)
3791         add_cflags -fprofile-arcs -ftest-coverage
3792         add_ldflags --coverage
3793     ;;
3794     hardened)
3795         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3796         add_cflags   -fno-strict-overflow -fstack-protector-all
3797         add_ldflags  -Wl,-z,relro -Wl,-z,now
3798         add_cflags   -fPIE
3799         add_ldexeflags -fPIE -pie
3800     ;;
3801     ?*)
3802         die "Unknown toolchain $toolchain"
3803     ;;
3804 esac
3805
3806 test -n "$cross_prefix" && enable cross_compile
3807
3808 if enabled cross_compile; then
3809     test -n "$arch" && test -n "$target_os" ||
3810         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3811 fi
3812
3813 ar_default="${cross_prefix}${ar_default}"
3814 cc_default="${cross_prefix}${cc_default}"
3815 cxx_default="${cross_prefix}${cxx_default}"
3816 nm_default="${cross_prefix}${nm_default}"
3817 pkg_config_default="${cross_prefix}${pkg_config_default}"
3818 if ${cross_prefix}${ranlib_default} 2>&1 | grep -q "\-D "; then
3819     ranlib_default="${cross_prefix}${ranlib_default} -D"
3820 else
3821     ranlib_default="${cross_prefix}${ranlib_default}"
3822 fi
3823 strip_default="${cross_prefix}${strip_default}"
3824 windres_default="${cross_prefix}${windres_default}"
3825
3826 sysinclude_default="${sysroot}/usr/include"
3827
3828 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3829     target_exec target_os x86asmexe nvcc
3830 enabled cross_compile || host_cc_default=$cc
3831 set_default host_cc
3832
3833 pkg_config_fail_message=""
3834 if ! $pkg_config --version >/dev/null 2>&1; then
3835     warn "$pkg_config not found, library detection may fail."
3836     pkg_config=false
3837 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3838     pkg_config_fail_message="
3839 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3840 fi
3841
3842 if test $doxygen != $doxygen_default && \
3843   ! $doxygen --version >/dev/null 2>&1; then
3844     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3845 fi
3846
3847 exesuf() {
3848     case $1 in
3849         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3850     esac
3851 }
3852
3853 EXESUF=$(exesuf $target_os)
3854 HOSTEXESUF=$(exesuf $host_os)
3855
3856 # set temporary file name
3857 : ${TMPDIR:=$TEMPDIR}
3858 : ${TMPDIR:=$TMP}
3859 : ${TMPDIR:=/tmp}
3860
3861 if [ -n "$tempprefix" ] ; then
3862     mktemp(){
3863         tmpname="$tempprefix.${HOSTNAME}.${UID}"
3864         echo "$tmpname"
3865         mkdir "$tmpname"
3866     }
3867 elif ! check_cmd mktemp -u XXXXXX; then
3868     # simple replacement for missing mktemp
3869     # NOT SAFE FOR GENERAL USE
3870     mktemp(){
3871         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3872         echo "$tmpname"
3873         mkdir "$tmpname"
3874     }
3875 fi
3876
3877 FFTMPDIR=$(mktemp -d "${TMPDIR}/ffconf.XXXXXXXX" 2> /dev/null) ||
3878     die "Unable to create temporary directory in $TMPDIR."
3879
3880 tmpfile(){
3881     tmp="${FFTMPDIR}/test"$2
3882     (set -C; exec > $tmp) 2> /dev/null ||
3883         die "Unable to create temporary file in $FFTMPDIR."
3884     eval $1=$tmp
3885 }
3886
3887 trap 'rm -rf -- "$FFTMPDIR"' EXIT
3888 trap 'exit 2' INT
3889
3890 tmpfile TMPASM .asm
3891 tmpfile TMPC   .c
3892 tmpfile TMPCPP .cpp
3893 tmpfile TMPE   $EXESUF
3894 tmpfile TMPH   .h
3895 tmpfile TMPM   .m
3896 tmpfile TMPO   .o
3897 tmpfile TMPS   .S
3898 tmpfile TMPSH  .sh
3899 tmpfile TMPV   .ver
3900
3901 unset -f mktemp
3902
3903 chmod +x $TMPE
3904
3905 # make sure we can execute files in $TMPDIR
3906 cat > $TMPSH 2>> $logfile <<EOF
3907 #! /bin/sh
3908 EOF
3909 chmod +x $TMPSH >> $logfile 2>&1
3910 if ! $TMPSH >> $logfile 2>&1; then
3911     cat <<EOF
3912 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3913 variable to another directory and make sure that it is not mounted noexec.
3914 EOF
3915     die "Sanity test failed."
3916 fi
3917
3918 armasm_flags(){
3919     for flag; do
3920         case $flag in
3921             # Filter out MSVC cl.exe options from cflags that shouldn't
3922             # be passed to gas-preprocessor
3923             -M[TD]*)                                            ;;
3924             *)                  echo $flag                      ;;
3925         esac
3926    done
3927 }
3928
3929 ccc_flags(){
3930     for flag; do
3931         case $flag in
3932             -std=c99)           echo -c99                       ;;
3933             -mcpu=*)            echo -arch ${flag#*=}           ;;
3934             -mieee)             echo -ieee                      ;;
3935             -O*|-fast)          echo $flag                      ;;
3936             -fno-math-errno)    echo -assume nomath_errno       ;;
3937             -g)                 echo -g3                        ;;
3938             -Wall)              echo -msg_enable level2         ;;
3939             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3940             -Wl,*)              echo $flag                      ;;
3941             -f*|-W*)                                            ;;
3942             *)                  echo $flag                      ;;
3943         esac
3944    done
3945 }
3946
3947 cparser_flags(){
3948     for flag; do
3949         case $flag in
3950             -Wno-switch)             echo -Wno-switch-enum ;;
3951             -Wno-format-zero-length) ;;
3952             -Wdisabled-optimization) ;;
3953             -Wno-pointer-sign)       echo -Wno-other ;;
3954             *)                       echo $flag ;;
3955         esac
3956     done
3957 }
3958
3959 msvc_common_flags(){
3960     for flag; do
3961         case $flag in
3962             # In addition to specifying certain flags under the compiler
3963             # specific filters, they must be specified here as well or else the
3964             # generic catch all at the bottom will print the original flag.
3965             -Wall)                ;;
3966             -Wextra)              ;;
3967             -std=c99)             ;;
3968             # Common flags
3969             -fomit-frame-pointer) ;;
3970             -g)                   echo -Z7 ;;
3971             -fno-math-errno)      ;;
3972             -fno-common)          ;;
3973             -fno-signed-zeros)    ;;
3974             -fPIC)                ;;
3975             -mthumb)              ;;
3976             -march=*)             ;;
3977             -lz)                  echo zlib.lib ;;
3978             -lx264)               echo libx264.lib ;;
3979             -lstdc++)             ;;
3980             -l*)                  echo ${flag#-l}.lib ;;
3981             -LARGEADDRESSAWARE)   echo $flag ;;
3982             -L*)                  echo -libpath:${flag#-L} ;;
3983             *)                    echo $flag ;;
3984         esac
3985     done
3986 }
3987
3988 msvc_flags(){
3989     msvc_common_flags "$@"
3990     for flag; do
3991         case $flag in
3992             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3993                                        -wd4554 ;;
3994             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3995                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3996                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3997                                        -wd4307 \
3998                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3999         esac
4000     done
4001 }
4002
4003 icl_flags(){
4004     msvc_common_flags "$@"
4005     for flag; do
4006         case $flag in
4007             # Despite what Intel's documentation says -Wall, which is supported
4008             # on Windows, does enable remarks so disable them here.
4009             -Wall)                echo $flag -Qdiag-disable:remark ;;
4010             -std=c99)             echo -Qstd=c99 ;;
4011             -flto)                echo -ipo ;;
4012         esac
4013     done
4014 }
4015
4016 icc_flags(){
4017     for flag; do
4018         case $flag in
4019             -flto)                echo -ipo ;;
4020             *)                    echo $flag ;;
4021         esac
4022     done
4023 }
4024
4025 pgi_flags(){
4026     for flag; do
4027         case $flag in
4028             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
4029             -fomit-frame-pointer) echo -Mnoframe ;;
4030             -g)                   echo -gopt ;;
4031             *)                    echo $flag ;;
4032         esac
4033     done
4034 }
4035
4036 suncc_flags(){
4037     for flag; do
4038         case $flag in
4039             -march=*|-mcpu=*)
4040                 case "${flag#*=}" in
4041                     native)                   echo -xtarget=native       ;;
4042                     v9|niagara)               echo -xarch=sparc          ;;
4043                     ultrasparc)               echo -xarch=sparcvis       ;;
4044                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
4045                     i586|pentium)             echo -xchip=pentium        ;;
4046                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
4047                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
4048                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
4049                     pentium4*)          echo -xtarget=pentium4           ;;
4050                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
4051                     *-sse3)             echo -xarch=sse3                 ;;
4052                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
4053                     bonnell)                   echo -xarch=ssse3         ;;
4054                     corei7|nehalem)            echo -xtarget=nehalem     ;;
4055                     westmere)                  echo -xtarget=westmere    ;;
4056                     silvermont)                echo -xarch=sse4_2        ;;
4057                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
4058                     core-avx*|ivybridge|haswell|broadwell|skylake*|knl)
4059                                                echo -xarch=avx           ;;
4060                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
4061                     btver1)                    echo -xarch=amdsse4a      ;;
4062                     btver2|bdver*|znver*)      echo -xarch=avx           ;;
4063                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
4064                     k8|opteron|athlon64|athlon-fx)
4065                                                echo -xarch=sse2a         ;;
4066                     athlon*)                   echo -xarch=pentium_proa  ;;
4067                 esac
4068                 ;;
4069             -std=c99)             echo -xc99              ;;
4070             -fomit-frame-pointer) echo -xregs=frameptr    ;;
4071             -fPIC)                echo -KPIC -xcode=pic32 ;;
4072             -W*,*)                echo $flag              ;;
4073             -f*-*|-W*|-mimpure-text)                      ;;
4074             -shared)              echo -G                 ;;
4075             *)                    echo $flag              ;;
4076         esac
4077     done
4078 }
4079
4080 tms470_flags(){
4081     for flag; do
4082         case $flag in
4083             -march=*|-mcpu=*)
4084                 case "${flag#*=}" in
4085                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
4086                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
4087                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
4088                     armv6*|arm11*)          echo -mv=6   ;;
4089                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
4090                                             echo -mv=5e  ;;
4091                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
4092                 esac
4093                 ;;
4094             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
4095             -mfpu=vfp)      echo --float_support=vfpv2        ;;
4096             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
4097             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
4098             -msoft-float)   echo --float_support=vfplib       ;;
4099             -O[0-3]|-mf=*)  echo $flag                        ;;
4100             -g)             echo -g -mn                       ;;
4101             -pds=*)         echo $flag                        ;;
4102             -D*|-I*)        echo $flag                        ;;
4103             --gcc|--abi=*)  echo $flag                        ;;
4104             -me)            echo $flag                        ;;
4105         esac
4106     done
4107 }
4108
4109 probe_cc(){
4110     pfx=$1
4111     _cc=$2
4112     first=$3
4113
4114     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
4115     unset _ld_o _ldflags _ld_lib _ld_path
4116     unset _depflags _DEPCMD _DEPFLAGS
4117     _flags_filter=echo
4118
4119     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
4120         true # no-op to avoid reading stdin in following checks
4121     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
4122         _type=llvm_gcc
4123         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
4124         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
4125         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4126         _cflags_speed='-O3'
4127         _cflags_size='-Os'
4128     elif $_cc -v 2>&1 | grep -qi ^gcc; then
4129         _type=gcc
4130         gcc_version=$($_cc --version | head -n1)
4131         gcc_basever=$($_cc -dumpversion)
4132         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
4133         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
4134         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
4135         case $gcc_basever in
4136             2) ;;
4137             2.*) ;;
4138             *) _depflags='-MMD -MF $(@:.o=.d) -MT $@' ;;
4139         esac
4140         if [ "$first" = true ]; then
4141             case $gcc_basever in
4142                 4.2*)
4143                 warn "gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler." ;;
4144             esac
4145         fi
4146         _cflags_speed='-O3'
4147         _cflags_size='-Os'
4148     elif $_cc --version 2>/dev/null | grep -q ^icc; then
4149         _type=icc
4150         _ident=$($_cc --version | head -n1)
4151         _depflags='-MMD'
4152         _cflags_speed='-O3'
4153         _cflags_size='-Os'
4154         _cflags_noopt='-O1'
4155         _flags_filter=icc_flags
4156     elif $_cc -v 2>&1 | grep -q xlc; then
4157         _type=xlc
4158         _ident=$($_cc -qversion 2>/dev/null | head -n1)
4159         _cflags_speed='-O5'
4160         _cflags_size='-O5 -qcompact'
4161     elif $_cc -V 2>/dev/null | grep -q Compaq; then
4162         _type=ccc
4163         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
4164         _DEPFLAGS='-M'
4165         _cflags_speed='-fast'
4166         _cflags_size='-O1'
4167         _flags_filter=ccc_flags
4168     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
4169         test -d "$sysroot" || die "No valid sysroot specified."
4170         _type=armcc
4171         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
4172         armcc_conf="$PWD/armcc.conf"
4173         $_cc --arm_linux_configure                 \
4174              --arm_linux_config_file="$armcc_conf" \
4175              --configure_sysroot="$sysroot"        \
4176              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
4177              die "Error creating armcc configuration file."
4178         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
4179         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
4180         as_default="${cross_prefix}gcc"
4181         _depflags='-MMD'
4182         _cflags_speed='-O3'
4183         _cflags_size='-Os'
4184     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
4185         _type=tms470
4186         _ident=$($_cc -version | head -n1 | tr -s ' ')
4187         _flags='--gcc --abi=eabi -me'
4188         _cc_e='-ppl -fe=$@'
4189         _cc_o='-fe=$@'
4190         _depflags='-ppa -ppd=$(@:.o=.d)'
4191         _cflags_speed='-O3 -mf=5'
4192         _cflags_size='-O3 -mf=2'
4193         _flags_filter=tms470_flags
4194     elif $_cc -v 2>&1 | grep -q clang; then
4195         _type=clang
4196         _ident=$($_cc --version 2>/dev/null | head -n1)
4197         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4198         _cflags_speed='-O3'
4199         _cflags_size='-Oz'
4200     elif $_cc -V 2>&1 | grep -q Sun; then
4201         _type=suncc
4202         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
4203         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
4204         _DEPFLAGS='-xM1 -xc99'
4205         _ldflags='-std=c99'
4206         _cflags_speed='-O5'
4207         _cflags_size='-O5 -xspace'
4208         _flags_filter=suncc_flags
4209     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
4210         _type=pathscale
4211         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
4212         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4213         _cflags_speed='-O2'
4214         _cflags_size='-Os'
4215         _flags_filter='filter_out -Wdisabled-optimization'
4216     elif $_cc -v 2>&1 | grep -q Open64; then
4217         _type=open64
4218         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
4219         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4220         _cflags_speed='-O2'
4221         _cflags_size='-Os'
4222         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
4223     elif $_cc -V 2>&1 | grep -q Portland; then
4224         _type=pgi
4225         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
4226         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
4227         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
4228         _cflags_size="-O2 -Munroll=c:1 $opt_common"
4229         _cflags_noopt="-O"
4230         _flags_filter=pgi_flags
4231     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
4232         _type=armasm
4233         _ident=$($_cc | head -n1)
4234         # 4509: "This form of conditional instruction is deprecated"
4235         _flags="-nologo -ignore 4509"
4236         _flags_filter=armasm_flags
4237     elif $_cc 2>&1 | grep -q Intel; then
4238         _type=icl
4239         _ident=$($_cc 2>&1 | head -n1)
4240         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
4241         # Not only is O3 broken on 13.x+ but it is slower on all previous
4242         # versions (tested) as well.
4243         _cflags_speed="-O2"
4244         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
4245         if $_cc 2>&1 | grep -q Linker; then
4246             _ld_o='-out:$@'
4247         else
4248             _ld_o='-Fe$@'
4249         fi
4250         _cc_o='-Fo$@'
4251         _cc_e='-P'
4252         _flags_filter=icl_flags
4253         _ld_lib='lib%.a'
4254         _ld_path='-libpath:'
4255         # -Qdiag-error to make icl error when seeing certain unknown arguments
4256         _flags='-nologo -Qdiag-error:4044,10157'
4257         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
4258         # with MSVC which enables it by default.
4259         _cflags='-Qms0 -Qvec- -Qsimd- -GS -fp:precise'
4260         disable stripping
4261     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
4262         # lld can emulate multiple different linkers; in ms link.exe mode,
4263         # the -? parameter gives the help output which contains an identifyable
4264         # string, while it gives an error in other modes.
4265         _type=lld-link
4266         # The link.exe mode doesn't have a switch for getting the version,
4267         # but we can force it back to gnu mode and get the version from there.
4268         _ident=$($_cc -flavor gnu --version 2>/dev/null)
4269         _ld_o='-out:$@'
4270         _flags_filter=msvc_flags
4271         _ld_lib='lib%.a'
4272         _ld_path='-libpath:'
4273     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
4274         _type=msvc
4275         _ident=$($_cc 2>&1 | head -n1)
4276         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
4277         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
4278         _cflags_speed="-O2"
4279         _cflags_size="-O1"
4280         _cflags_noopt="-O1"
4281         if $_cc -nologo- 2>&1 | grep -q Linker; then
4282             _ld_o='-out:$@'
4283         else
4284             _ld_o='-Fe$@'
4285         fi
4286         _cc_o='-Fo$@'
4287         _cc_e='-P -Fi$@'
4288         _flags_filter=msvc_flags
4289         _ld_lib='lib%.a'
4290         _ld_path='-libpath:'
4291         _flags='-nologo'
4292         disable stripping
4293     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
4294         _type=cparser
4295         _ident=$($_cc --version | head -n1)
4296         _depflags='-MMD'
4297         _cflags_speed='-O4'
4298         _cflags_size='-O2'
4299         _flags_filter=cparser_flags
4300     fi
4301
4302     eval ${pfx}_type=\$_type
4303     eval ${pfx}_ident=\$_ident
4304 }
4305
4306 set_ccvars(){
4307     eval ${1}_C=\${_cc_c-\${${1}_C}}
4308     eval ${1}_E=\${_cc_e-\${${1}_E}}
4309     eval ${1}_O=\${_cc_o-\${${1}_O}}
4310
4311     if [ -n "$_depflags" ]; then
4312         eval ${1}_DEPFLAGS=\$_depflags
4313     else
4314         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
4315         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
4316         eval DEP${1}FLAGS=\$_flags
4317     fi
4318 }
4319
4320 probe_cc cc "$cc" "true"
4321 cflags_filter=$_flags_filter
4322 cflags_speed=$_cflags_speed
4323 cflags_size=$_cflags_size
4324 cflags_noopt=$_cflags_noopt
4325 add_cflags $_flags $_cflags
4326 cc_ldflags=$_ldflags
4327 set_ccvars CC
4328 set_ccvars CXX
4329
4330 probe_cc hostcc "$host_cc"
4331 host_cflags_filter=$_flags_filter
4332 host_cflags_speed=$_cflags_speed
4333 add_host_cflags  $_flags $_cflags
4334 set_ccvars HOSTCC
4335
4336 test -n "$cc_type" && enable $cc_type ||
4337     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
4338
4339 : ${as_default:=$cc}
4340 : ${objcc_default:=$cc}
4341 : ${dep_cc_default:=$cc}
4342 : ${ld_default:=$cc}
4343 : ${host_ld_default:=$host_cc}
4344 set_default ar as objcc dep_cc ld ln_s host_ld windres
4345
4346 probe_cc as "$as"
4347 asflags_filter=$_flags_filter
4348 add_asflags $_flags $_cflags
4349 set_ccvars AS
4350
4351 probe_cc objcc "$objcc"
4352 objcflags_filter=$_flags_filter
4353 add_objcflags $_flags $_cflags
4354 set_ccvars OBJC
4355
4356 probe_cc ld "$ld"
4357 ldflags_filter=$_flags_filter
4358 add_ldflags $_flags $_ldflags
4359 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
4360 LD_O=${_ld_o-$LD_O}
4361 LD_LIB=${_ld_lib-$LD_LIB}
4362 LD_PATH=${_ld_path-$LD_PATH}
4363
4364 probe_cc hostld "$host_ld"
4365 host_ldflags_filter=$_flags_filter
4366 add_host_ldflags $_flags $_ldflags
4367 HOSTLD_O=${_ld_o-$HOSTLD_O}
4368
4369 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
4370     probe_cc depcc "$dep_cc"
4371     CCDEP=${_DEPCMD:-$DEPCMD}
4372     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
4373     DEPCCFLAGS=$_flags
4374 fi
4375
4376 if $ar 2>&1 | grep -q Microsoft; then
4377     arflags="-nologo"
4378     ar_o='-out:$@'
4379 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
4380     arflags="rq"
4381     ar_o='$@'
4382 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
4383     arflags='-Xany -r -c'
4384     ar_o='$@'
4385 elif $ar 2>&1 | grep -q "\[D\] "; then
4386     arflags="rcD"
4387     ar_o='$@'
4388 else
4389     arflags="rc"
4390     ar_o='$@'
4391 fi
4392
4393 add_cflags $extra_cflags
4394 add_cxxflags $extra_cxxflags
4395 add_objcflags $extra_objcflags
4396 add_asflags $extra_cflags
4397
4398 if test -n "$sysroot"; then
4399     case "$cc_type" in
4400         gcc|llvm_gcc|clang)
4401             add_cppflags --sysroot="$sysroot"
4402             add_ldflags --sysroot="$sysroot"
4403 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
4404             add_cppflags -isysroot "$sysroot"
4405             add_ldflags -isysroot "$sysroot"
4406         ;;
4407         tms470)
4408             add_cppflags -I"$sysinclude"
4409             add_ldflags  --sysroot="$sysroot"
4410         ;;
4411     esac
4412 fi
4413
4414 if test "$cpu" = host; then
4415     enabled cross_compile &&
4416         die "--cpu=host makes no sense when cross-compiling."
4417
4418     case "$cc_type" in
4419         gcc|llvm_gcc)
4420             check_native(){
4421                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4422                 sed -n "/cc1.*$1=/{
4423                             s/.*$1=\\([^ ]*\\).*/\\1/
4424                             p
4425                             q
4426                         }" $TMPE
4427             }
4428             cpu=$(check_native -march || check_native -mcpu)
4429         ;;
4430         clang)
4431             check_native(){
4432                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4433                 sed -n "/cc1.*-target-cpu /{
4434                             s/.*-target-cpu \\([^ ]*\\).*/\\1/
4435                             p
4436                             q
4437                         }" $TMPE
4438             }
4439             cpu=$(check_native -march)
4440         ;;
4441     esac
4442
4443     test "${cpu:-host}" = host &&
4444         die "--cpu=host not supported with compiler $cc"
4445 fi
4446
4447 # Deal with common $arch aliases
4448 case "$arch" in
4449     aarch64|arm64)
4450         arch="aarch64"
4451     ;;
4452     arm*|iPad*|iPhone*)
4453         arch="arm"
4454     ;;
4455     mips*|IP*)
4456         case "$arch" in
4457         *el)
4458             add_cppflags -EL
4459             add_ldflags -EL
4460         ;;
4461         *eb)
4462             add_cppflags -EB
4463             add_ldflags -EB
4464         ;;
4465         esac
4466         arch="mips"
4467     ;;
4468     parisc*|hppa*)
4469         arch="parisc"
4470     ;;
4471     "Power Macintosh"|ppc*|powerpc*)
4472         arch="ppc"
4473     ;;
4474     s390|s390x)
4475         arch="s390"
4476     ;;
4477     sh4|sh)
4478         arch="sh4"
4479     ;;
4480     sun4*|sparc*)
4481         arch="sparc"
4482     ;;
4483     tilegx|tile-gx)
4484         arch="tilegx"
4485     ;;
4486     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
4487         arch="x86"
4488     ;;
4489 esac
4490
4491 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
4492 enable $arch
4493
4494 # Add processor-specific flags
4495 if enabled aarch64; then
4496
4497     case $cpu in
4498         armv*)
4499             cpuflags="-march=$cpu"
4500         ;;
4501         *)
4502             cpuflags="-mcpu=$cpu"
4503         ;;
4504     esac
4505
4506 elif enabled alpha; then
4507
4508     cpuflags="-mcpu=$cpu"
4509
4510 elif enabled arm; then
4511
4512     check_arm_arch() {
4513         check_cpp_condition stddef.h \
4514             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
4515             $cpuflags
4516     }
4517
4518     probe_arm_arch() {
4519         if   check_arm_arch 4;        then echo armv4
4520         elif check_arm_arch 4T;       then echo armv4t
4521         elif check_arm_arch 5;        then echo armv5
4522         elif check_arm_arch 5E;       then echo armv5e
4523         elif check_arm_arch 5T;       then echo armv5t
4524         elif check_arm_arch 5TE;      then echo armv5te
4525         elif check_arm_arch 5TEJ;     then echo armv5te
4526         elif check_arm_arch 6;        then echo armv6
4527         elif check_arm_arch 6J;       then echo armv6j
4528         elif check_arm_arch 6K;       then echo armv6k
4529         elif check_arm_arch 6Z;       then echo armv6z
4530         elif check_arm_arch 6ZK;      then echo armv6zk
4531         elif check_arm_arch 6T2;      then echo armv6t2
4532         elif check_arm_arch 7;        then echo armv7
4533         elif check_arm_arch 7A  7_A;  then echo armv7-a
4534         elif check_arm_arch 7S;       then echo armv7-a
4535         elif check_arm_arch 7R  7_R;  then echo armv7-r
4536         elif check_arm_arch 7M  7_M;  then echo armv7-m
4537         elif check_arm_arch 7EM 7E_M; then echo armv7-m
4538         elif check_arm_arch 8A  8_A;  then echo armv8-a
4539         fi
4540     }
4541
4542     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
4543
4544     case $cpu in
4545         armv*)
4546             cpuflags="-march=$cpu"
4547             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
4548         ;;
4549         *)
4550             cpuflags="-mcpu=$cpu"
4551             case $cpu in
4552                 cortex-a*)                               subarch=armv7a  ;;
4553                 cortex-r*)                               subarch=armv7r  ;;
4554                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
4555                 arm11*)                                  subarch=armv6   ;;
4556                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
4557                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
4558                 *)                             subarch=$(probe_arm_arch) ;;
4559             esac
4560         ;;
4561     esac
4562
4563     case "$subarch" in
4564         armv5t*)    enable fast_clz                ;;
4565         armv[6-8]*)
4566             enable fast_clz
4567             disabled fast_unaligned || enable fast_unaligned
4568             ;;
4569     esac
4570
4571 elif enabled avr32; then
4572
4573     case $cpu in
4574         ap7[02]0[0-2])
4575             subarch="avr32_ap"
4576             cpuflags="-mpart=$cpu"
4577         ;;
4578         ap)
4579             subarch="avr32_ap"
4580             cpuflags="-march=$cpu"
4581         ;;
4582         uc3[ab]*)
4583             subarch="avr32_uc"
4584             cpuflags="-mcpu=$cpu"
4585         ;;
4586         uc)
4587             subarch="avr32_uc"
4588             cpuflags="-march=$cpu"
4589         ;;
4590     esac
4591
4592 elif enabled bfin; then
4593
4594     cpuflags="-mcpu=$cpu"
4595
4596 elif enabled mips; then
4597
4598     cpuflags="-march=$cpu"
4599
4600     if [ "$cpu" != "generic" ]; then
4601         disable mips32r2
4602         disable mips32r5
4603         disable mips64r2
4604         disable mips32r6
4605         disable mips64r6
4606         disable loongson2
4607         disable loongson3
4608
4609         case $cpu in
4610             24kc|24kf*|24kec|34kc|1004kc|24kef*|34kf*|1004kf*|74kc|74kf)
4611                 enable mips32r2
4612                 disable msa
4613             ;;
4614             p5600|i6400|p6600)
4615                 disable mipsdsp
4616                 disable mipsdspr2
4617             ;;
4618             loongson*)
4619                 enable loongson2
4620                 enable loongson3
4621                 enable local_aligned_8 local_aligned_16 local_aligned_32
4622                 enable simd_align_16
4623                 enable fast_64bit
4624                 enable fast_clz
4625                 enable fast_cmov
4626                 enable fast_unaligned
4627                 disable aligned_stack
4628                 disable mipsfpu
4629                 disable mipsdsp
4630                 disable mipsdspr2
4631                 case $cpu in
4632                     loongson3*)
4633                         cpuflags="-march=loongson3a -mhard-float -fno-expensive-optimizations"
4634                     ;;
4635                     loongson2e)
4636                         cpuflags="-march=loongson2e -mhard-float -fno-expensive-optimizations"
4637                     ;;
4638                     loongson2f)
4639                         cpuflags="-march=loongson2f -mhard-float -fno-expensive-optimizations"
4640                     ;;
4641                 esac
4642             ;;
4643             *)
4644                 # Unknown CPU. Disable everything.
4645                 warn "unknown CPU. Disabling all MIPS optimizations."
4646                 disable mipsfpu
4647                 disable mipsdsp
4648                 disable mipsdspr2
4649                 disable msa
4650                 disable mmi
4651             ;;
4652         esac
4653
4654         case $cpu in
4655             24kc)
4656                 disable mipsfpu
4657                 disable mipsdsp
4658                 disable mipsdspr2
4659             ;;
4660             24kf*)
4661                 disable mipsdsp
4662                 disable mipsdspr2
4663             ;;
4664             24kec|34kc|1004kc)
4665                 disable mipsfpu
4666                 disable mipsdspr2
4667             ;;
4668             24kef*|34kf*|1004kf*)
4669                 disable mipsdspr2
4670             ;;
4671             74kc)
4672                 disable mipsfpu
4673             ;;
4674             p5600)
4675                 enable mips32r5
4676                 check_cflags "-mtune=p5600" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops"
4677             ;;
4678             i6400)
4679                 enable mips64r6
4680                 check_cflags "-mtune=i6400 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4681             ;;
4682             p6600)
4683                 enable mips64r6
4684                 check_cflags "-mtune=p6600 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4685             ;;
4686         esac
4687     else
4688         # We do not disable anything. Is up to the user to disable the unwanted features.
4689         warn 'generic cpu selected'
4690     fi
4691
4692 elif enabled ppc; then
4693
4694     disable ldbrx
4695
4696     case $(tolower $cpu) in
4697         601|ppc601|powerpc601)
4698             cpuflags="-mcpu=601"
4699             disable altivec
4700         ;;
4701         603*|ppc603*|powerpc603*)
4702             cpuflags="-mcpu=603"
4703             disable altivec
4704         ;;
4705         604*|ppc604*|powerpc604*)
4706             cpuflags="-mcpu=604"
4707             disable altivec
4708         ;;
4709         g3|75*|ppc75*|powerpc75*)
4710             cpuflags="-mcpu=750"
4711             disable altivec
4712         ;;
4713         g4|745*|ppc745*|powerpc745*)
4714             cpuflags="-mcpu=7450"
4715             disable vsx
4716         ;;
4717         74*|ppc74*|powerpc74*)
4718             cpuflags="-mcpu=7400"
4719             disable vsx
4720         ;;
4721         g5|970|ppc970|powerpc970)
4722             cpuflags="-mcpu=970"
4723             disable vsx
4724         ;;
4725         power[3-6]*)
4726             cpuflags="-mcpu=$cpu"
4727             disable vsx
4728         ;;
4729         power[7-8]*)
4730             cpuflags="-mcpu=$cpu"
4731         ;;
4732         cell)
4733             cpuflags="-mcpu=cell"
4734             enable ldbrx
4735             disable vsx
4736         ;;
4737         e500mc)
4738             cpuflags="-mcpu=e500mc"
4739             disable altivec
4740         ;;
4741         e500v2)
4742             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
4743             disable altivec
4744             disable dcbzl
4745         ;;
4746         e500)
4747             cpuflags="-mcpu=8540 -mhard-float"
4748             disable altivec
4749             disable dcbzl
4750         ;;
4751     esac
4752
4753 elif enabled sparc; then
4754
4755     case $cpu in
4756         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
4757             cpuflags="-mcpu=$cpu"
4758         ;;
4759         ultrasparc*|niagara[234])
4760             cpuflags="-mcpu=$cpu"
4761         ;;
4762     esac
4763
4764 elif enabled x86; then
4765
4766     case $cpu in
4767         i[345]86|pentium)
4768             cpuflags="-march=$cpu"
4769             disable i686
4770             disable mmx
4771         ;;
4772         # targets that do NOT support nopl and conditional mov (cmov)
4773         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
4774             cpuflags="-march=$cpu"
4775             disable i686
4776         ;;
4777         # targets that do support nopl and conditional mov (cmov)
4778         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
4779         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|skylake*|knl\
4780         |amdfam10|barcelona|b[dt]ver*|znver*)
4781             cpuflags="-march=$cpu"
4782             enable i686
4783             enable fast_cmov
4784         ;;
4785         # targets that do support conditional mov but on which it's slow
4786         pentium4|pentium4m|prescott|nocona)
4787             cpuflags="-march=$cpu"
4788             enable i686
4789             disable fast_cmov
4790         ;;
4791     esac
4792
4793 fi
4794
4795 if [ "$cpu" != generic ]; then
4796     add_cflags  $cpuflags
4797     add_asflags $cpuflags
4798     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
4799 fi
4800
4801 # compiler sanity check
4802 check_exec <<EOF
4803 int main(void){ return 0; }
4804 EOF
4805 if test "$?" != 0; then
4806     echo "$cc is unable to create an executable file."
4807     if test -z "$cross_prefix" && ! enabled cross_compile ; then
4808         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
4809         echo "Only do this if you know what cross compiling means."
4810     fi
4811     die "C compiler test failed."
4812 fi
4813
4814 add_cppflags -D_ISOC99_SOURCE
4815 add_cxxflags -D__STDC_CONSTANT_MACROS
4816 check_cxxflags -std=c++11 || check_cxxflags -std=c++0x
4817
4818 # some compilers silently accept -std=c11, so we also need to check that the
4819 # version macro is defined properly
4820 check_cpp_condition ctype.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
4821     add_cflags -std=c11 ||
4822     check_cflags -std=c99
4823
4824 check_cppflags -D_FILE_OFFSET_BITS=64
4825 check_cppflags -D_LARGEFILE_SOURCE
4826
4827 add_host_cppflags -D_ISOC99_SOURCE
4828 check_host_cflags -std=c99
4829 check_host_cflags -Wall
4830 check_host_cflags $host_cflags_speed
4831
4832 check_64bit(){
4833     arch32=$1
4834     arch64=$2
4835     expr=$3
4836     check_code cc "" "int test[2*($expr) - 1]" &&
4837         subarch=$arch64 || subarch=$arch32
4838 }
4839
4840 case "$arch" in
4841     aarch64|alpha|ia64)
4842         spic=$shared
4843     ;;
4844     mips)
4845         check_64bit mips mips64 '_MIPS_SIM > 1'
4846         spic=$shared
4847     ;;
4848     parisc)
4849         check_64bit parisc parisc64 'sizeof(void *) > 4'
4850         spic=$shared
4851     ;;
4852     ppc)
4853         check_64bit ppc ppc64 'sizeof(void *) > 4'
4854         spic=$shared
4855     ;;
4856     s390)
4857         check_64bit s390 s390x 'sizeof(void *) > 4'
4858         spic=$shared
4859     ;;
4860     sparc)
4861         check_64bit sparc sparc64 'sizeof(void *) > 4'
4862         spic=$shared
4863     ;;
4864     x86)
4865         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
4866         # Treat x32 as x64 for now. Note it also needs spic=$shared
4867         test "$subarch" = "x86_32" && check_cpp_condition stddef.h 'defined(__x86_64__)' &&
4868             subarch=x86_64
4869         if test "$subarch" = "x86_64"; then