Merge commit '7208e5b5d638d4b9c2784036b4fc5728f32233c7'
[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   --enable-rkmpp           enable Rockchip Media Process Platform code [no]
320   --disable-vaapi          disable Video Acceleration API (mainly Unix/Intel) code [autodetect]
321   --disable-vda            disable Apple Video Decode Acceleration code [autodetect]
322   --disable-vdpau          disable Nvidia Video Decode and Presentation API for Unix code [autodetect]
323   --disable-videotoolbox   disable VideoToolbox code [autodetect]
324
325 Toolchain options:
326   --arch=ARCH              select architecture [$arch]
327   --cpu=CPU                select the minimum required CPU (affects
328                            instruction selection, may crash on older CPUs)
329   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
330   --progs-suffix=SUFFIX    program name suffix []
331   --enable-cross-compile   assume a cross-compiler is used
332   --sysroot=PATH           root of cross-build tree
333   --sysinclude=PATH        location of cross-build system headers
334   --target-os=OS           compiler targets OS [$target_os]
335   --target-exec=CMD        command to run executables on target
336   --target-path=DIR        path to view of build directory on target
337   --target-samples=DIR     path to samples directory on target
338   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
339   --toolchain=NAME         set tool defaults according to NAME
340   --nm=NM                  use nm tool NM [$nm_default]
341   --ar=AR                  use archive tool AR [$ar_default]
342   --as=AS                  use assembler AS [$as_default]
343   --ln_s=LN_S              use symbolic link tool LN_S [$ln_s_default]
344   --strip=STRIP            use strip tool STRIP [$strip_default]
345   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
346   --x86asmexe=EXE          use nasm-compatible assembler EXE [$x86asmexe_default]
347   --cc=CC                  use C compiler CC [$cc_default]
348   --cxx=CXX                use C compiler CXX [$cxx_default]
349   --objcc=OCC              use ObjC compiler OCC [$cc_default]
350   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
351   --nvcc=NVCC              use Nvidia CUDA compiler NVCC [$nvcc_default]
352   --ld=LD                  use linker LD [$ld_default]
353   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
354   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
355   --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
356   --doxygen=DOXYGEN        use DOXYGEN to generate API doc [$doxygen_default]
357   --host-cc=HOSTCC         use host C compiler HOSTCC
358   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
359   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
360   --host-ld=HOSTLD         use host linker HOSTLD
361   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
362   --host-libs=HLIBS        use libs HLIBS when linking for host
363   --host-os=OS             compiler host OS [$target_os]
364   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
365   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
366   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
367   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
368   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
369   --extra-ldlibflags=ELDFLAGS add ELDFLAGS to LDLIBFLAGS [$LDLIBFLAGS]
370   --extra-libs=ELIBS       add ELIBS [$ELIBS]
371   --extra-version=STRING   version string suffix []
372   --optflags=OPTFLAGS      override optimization-related compiler flags
373   --nvccflags=NVCCFLAGS    override nvcc flags [$nvccflags_default]
374   --build-suffix=SUFFIX    library name suffix []
375   --enable-pic             build position-independent code
376   --enable-thumb           compile for Thumb instruction set
377   --enable-lto             use link-time optimization
378   --env="ENV=override"     override the environment variables
379
380 Advanced options (experts only):
381   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
382   --custom-allocator=NAME  use a supported custom allocator
383   --disable-symver         disable symbol versioning
384   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
385   --disable-safe-bitstream-reader
386                            disable buffer boundary checking in bitreaders
387                            (faster, but may crash)
388   --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
389
390 Optimization options (experts only):
391   --disable-asm            disable all assembly optimizations
392   --disable-altivec        disable AltiVec optimizations
393   --disable-vsx            disable VSX optimizations
394   --disable-power8         disable POWER8 optimizations
395   --disable-amd3dnow       disable 3DNow! optimizations
396   --disable-amd3dnowext    disable 3DNow! extended optimizations
397   --disable-mmx            disable MMX optimizations
398   --disable-mmxext         disable MMXEXT optimizations
399   --disable-sse            disable SSE optimizations
400   --disable-sse2           disable SSE2 optimizations
401   --disable-sse3           disable SSE3 optimizations
402   --disable-ssse3          disable SSSE3 optimizations
403   --disable-sse4           disable SSE4 optimizations
404   --disable-sse42          disable SSE4.2 optimizations
405   --disable-avx            disable AVX optimizations
406   --disable-xop            disable XOP optimizations
407   --disable-fma3           disable FMA3 optimizations
408   --disable-fma4           disable FMA4 optimizations
409   --disable-avx2           disable AVX2 optimizations
410   --disable-aesni          disable AESNI optimizations
411   --disable-armv5te        disable armv5te optimizations
412   --disable-armv6          disable armv6 optimizations
413   --disable-armv6t2        disable armv6t2 optimizations
414   --disable-vfp            disable VFP optimizations
415   --disable-neon           disable NEON optimizations
416   --disable-inline-asm     disable use of inline assembly
417   --disable-x86asm         disable use of standalone x86 assembly
418   --disable-mipsdsp        disable MIPS DSP ASE R1 optimizations
419   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
420   --disable-msa            disable MSA optimizations
421   --disable-mipsfpu        disable floating point MIPS optimizations
422   --disable-mmi            disable Loongson SIMD optimizations
423   --disable-fast-unaligned consider unaligned accesses slow
424
425 Developer options (useful when working on FFmpeg itself):
426   --disable-debug          disable debugging symbols
427   --enable-debug=LEVEL     set the debug level [$debuglevel]
428   --disable-optimizations  disable compiler optimizations
429   --enable-extra-warnings  enable more compiler warnings
430   --disable-stripping      disable stripping of executables and shared libraries
431   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
432                            2 causes a slowdown at runtime.
433   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
434   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
435                            leaks and errors, using the specified valgrind binary.
436                            Cannot be combined with --target-exec
437   --enable-ftrapv          Trap arithmetic overflows
438   --samples=PATH           location of test samples for FATE, if not set use
439                            \$FATE_SAMPLES at make invocation time.
440   --enable-neon-clobber-test check NEON registers for clobbering (should be
441                            used only for debugging purposes)
442   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
443                            should be used only for debugging purposes)
444   --enable-random          randomly enable/disable components
445   --disable-random
446   --enable-random=LIST     randomly enable/disable specific components or
447   --disable-random=LIST    component groups. LIST is a comma-separated list
448                            of NAME[:PROB] entries where NAME is a component
449                            (group) and PROB the probability associated with
450                            NAME (default 0.5).
451   --random-seed=VALUE      seed value for --enable/disable-random
452   --disable-valgrind-backtrace do not print a backtrace under Valgrind
453                            (only applies to --disable-optimizations builds)
454   --enable-osfuzz          Enable building fuzzer tool
455   --libfuzzer=PATH         path to libfuzzer
456   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
457                            in the name) of tests whose result is ignored
458   --enable-linux-perf      enable Linux Performance Monitor API
459
460 NOTE: Object files are built at the place where configure is launched.
461 EOF
462   exit 0
463 }
464
465 quotes='""'
466 if test -t 1 && which tput >/dev/null 2>&1; then
467     ncolors=$(tput colors)
468     if test -n "$ncolors" && test $ncolors -ge 8; then
469         bold_color=$(tput bold)
470         warn_color=$(tput setaf 3)
471         error_color=$(tput setaf 1)
472         reset_color=$(tput sgr0)
473     fi
474     # 72 used instead of 80 since that's the default of pr
475     ncols=$(tput cols)
476 fi
477 : ${ncols:=72}
478
479 log(){
480     echo "$@" >> $logfile
481 }
482
483 log_file(){
484     log BEGIN $1
485     pr -n -t $1 >> $logfile
486     log END $1
487 }
488
489 warn(){
490     log "WARNING: $*"
491     WARNINGS="${WARNINGS}WARNING: $*\n"
492 }
493
494 die(){
495     log "$@"
496     echo "$error_color$bold_color$@$reset_color"
497     cat <<EOF
498
499 If you think configure made a mistake, make sure you are using the latest
500 version from Git.  If the latest version fails, report the problem to the
501 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
502 EOF
503     if disabled logging; then
504         cat <<EOF
505 Rerun configure with logging enabled (do not use --disable-logging), and
506 include the log this produces with your report.
507 EOF
508     else
509         cat <<EOF
510 Include the log file "$logfile" produced by configure as this will help
511 solve the problem.
512 EOF
513     fi
514     exit 1
515 }
516
517 # Avoid locale weirdness, besides we really just want to translate ASCII.
518 toupper(){
519     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
520 }
521
522 tolower(){
523     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
524 }
525
526 c_escape(){
527     echo "$*" | sed 's/["\\]/\\\0/g'
528 }
529
530 sh_quote(){
531     v=$(echo "$1" | sed "s/'/'\\\\''/g")
532     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
533     echo "$v"
534 }
535
536 cleanws(){
537     echo "$@" | sed 's/^ *//;s/[[:space:]][[:space:]]*/ /g;s/ *$//'
538 }
539
540 filter(){
541     pat=$1
542     shift
543     for v; do
544         eval "case $v in $pat) printf '%s ' $v ;; esac"
545     done
546 }
547
548 filter_out(){
549     pat=$1
550     shift
551     for v; do
552         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
553     done
554 }
555
556 map(){
557     m=$1
558     shift
559     for v; do eval $m; done
560 }
561
562 add_suffix(){
563     suffix=$1
564     shift
565     for v; do echo ${v}${suffix}; done
566 }
567
568 set_all(){
569     value=$1
570     shift
571     for var in $*; do
572         eval $var=$value
573     done
574 }
575
576 set_weak(){
577     value=$1
578     shift
579     for var; do
580         eval : \${$var:=$value}
581     done
582 }
583
584 sanitize_var_name(){
585     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
586 }
587
588 set_safe(){
589     var=$1
590     shift
591     eval $(sanitize_var_name "$var")='$*'
592 }
593
594 get_safe(){
595     eval echo \$$(sanitize_var_name "$1")
596 }
597
598 pushvar(){
599     for pvar in $*; do
600         eval level=\${${pvar}_level:=0}
601         eval ${pvar}_${level}="\$$pvar"
602         eval ${pvar}_level=$(($level+1))
603     done
604 }
605
606 popvar(){
607     for pvar in $*; do
608         eval level=\${${pvar}_level:-0}
609         test $level = 0 && continue
610         eval level=$(($level-1))
611         eval $pvar="\${${pvar}_${level}}"
612         eval ${pvar}_level=$level
613         eval unset ${pvar}_${level}
614     done
615 }
616
617 request(){
618     for var in $*; do
619         eval ${var}_requested=yes
620         eval $var=
621     done
622 }
623
624 enable(){
625     set_all yes $*
626 }
627
628 disable(){
629     set_all no $*
630 }
631
632 enable_weak(){
633     set_weak yes $*
634 }
635
636 disable_weak(){
637     set_weak no $*
638 }
639
640 enable_safe(){
641     for var; do
642         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
643     done
644 }
645
646 disable_safe(){
647     for var; do
648         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
649     done
650 }
651
652 do_enable_deep(){
653     for var; do
654         enabled $var && continue
655         eval sel="\$${var}_select"
656         eval sgs="\$${var}_suggest"
657         pushvar var sgs
658         enable_deep $sel
659         popvar sgs
660         enable_deep_weak $sgs
661         popvar var
662     done
663 }
664
665 enable_deep(){
666     do_enable_deep $*
667     enable $*
668 }
669
670 enable_deep_weak(){
671     for var; do
672         disabled $var && continue
673         pushvar var
674         do_enable_deep $var
675         popvar var
676         enable_weak $var
677     done
678 }
679
680 requested(){
681     test "${1#!}" = "$1" && op='=' || op=!=
682     eval test "x\$${1#!}_requested" $op "xyes"
683 }
684
685 enabled(){
686     test "${1#!}" = "$1" && op='=' || op=!=
687     eval test "x\$${1#!}" $op "xyes"
688 }
689
690 disabled(){
691     test "${1#!}" = "$1" && op='=' || op=!=
692     eval test "x\$${1#!}" $op "xno"
693 }
694
695 enabled_all(){
696     for opt; do
697         enabled $opt || return 1
698     done
699 }
700
701 disabled_all(){
702     for opt; do
703         disabled $opt || return 1
704     done
705 }
706
707 enabled_any(){
708     for opt; do
709         enabled $opt && return 0
710     done
711 }
712
713 disabled_any(){
714     for opt; do
715         disabled $opt && return 0
716     done
717     return 1
718 }
719
720 set_default(){
721     for opt; do
722         eval : \${$opt:=\$${opt}_default}
723     done
724 }
725
726 is_in(){
727     value=$1
728     shift
729     for var in $*; do
730         [ $var = $value ] && return 0
731     done
732     return 1
733 }
734
735 do_check_deps(){
736     for cfg; do
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_con="\$${cfg}_conflict"
745         eval dep_sel="\$${cfg}_select"
746         eval dep_sgs="\$${cfg}_suggest"
747         eval dep_ifa="\$${cfg}_if"
748         eval dep_ifn="\$${cfg}_if_any"
749
750         pushvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
751         do_check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
752         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
753
754         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
755         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
756         enabled_all  $dep_all || { disable $cfg && requested $cfg && die "ERROR: $cfg requested, but not all dependencies are satisfied: $dep_all"; }
757         enabled_any  $dep_any || { disable $cfg && requested $cfg && die "ERROR: $cfg requested, but not any dependency is satisfied: $dep_any"; }
758         disabled_all $dep_con || { disable $cfg && requested $cfg && die "ERROR: $cfg requested, but some conflicting dependencies are unsatisfied: $dep_con"; }
759         disabled_any $dep_sel && { disable $cfg && requested $cfg && die "ERROR: $cfg requested, but some selected dependency is unsatisfied: $dep_sel"; }
760
761         if enabled $cfg; then
762             enable_deep $dep_sel
763             enable_deep_weak $dep_sgs
764         fi
765
766         disable ${cfg}_checking
767     done
768 }
769
770 check_deps(){
771     unset allopts
772
773     do_check_deps "$@"
774
775     for cfg in $allopts; do
776         enabled $cfg || continue
777         eval dep_extralibs="\$${cfg}_extralibs"
778         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
779     done
780 }
781
782 print_config(){
783     pfx=$1
784     files=$2
785     shift 2
786     map 'eval echo "$v \${$v:-no}"' "$@" |
787     awk "BEGIN { split(\"$files\", files) }
788         {
789             c = \"$pfx\" toupper(\$1);
790             v = \$2;
791             sub(/yes/, 1, v);
792             sub(/no/,  0, v);
793             for (f in files) {
794                 file = files[f];
795                 if (file ~ /\\.h\$/) {
796                     printf(\"#define %s %d\\n\", c, v) >>file;
797                 } else if (file ~ /\\.asm\$/) {
798                     printf(\"%%define %s %d\\n\", c, v) >>file;
799                 } else if (file ~ /\\.mak\$/) {
800                     n = -v ? \"\" : \"!\";
801                     printf(\"%s%s=yes\\n\", n, c) >>file;
802                 } else if (file ~ /\\.texi\$/) {
803                     pre = -v ? \"\" : \"@c \";
804                     yesno = \$2;
805                     c2 = tolower(c);
806                     gsub(/_/, \"-\", c2);
807                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
808                 }
809             }
810         }"
811 }
812
813 print_enabled(){
814     suf=$1
815     shift
816     for v; do
817         enabled $v && printf "%s\n" ${v%$suf}
818     done
819 }
820
821 append(){
822     var=$1
823     shift
824     eval "$var=\"\$$var $*\""
825 }
826
827 prepend(){
828     var=$1
829     shift
830     eval "$var=\"$* \$$var\""
831 }
832
833 unique(){
834     var=$1
835     uniq_list=""
836     for tok in $(eval echo \$$var); do
837         uniq_list="$(filter_out $tok $uniq_list) $tok"
838     done
839     eval "$var=\"${uniq_list}\""
840 }
841
842 add_cppflags(){
843     append CPPFLAGS "$@"
844 }
845
846 add_cflags(){
847     append CFLAGS $($cflags_filter "$@")
848 }
849
850 add_cflags_headers(){
851     append CFLAGS_HEADERS $($cflags_filter "$@")
852 }
853
854 add_cxxflags(){
855     append CXXFLAGS $($cflags_filter "$@")
856 }
857
858 add_asflags(){
859     append ASFLAGS $($asflags_filter "$@")
860 }
861
862 add_objcflags(){
863     append OBJCFLAGS $($objcflags_filter "$@")
864 }
865
866 add_ldflags(){
867     append LDFLAGS $($ldflags_filter "$@")
868 }
869
870 add_ldexeflags(){
871     append LDEXEFLAGS $($ldflags_filter "$@")
872 }
873
874 add_ldlibflags(){
875     append LDLIBFLAGS $($ldflags_filter "$@")
876 }
877
878 add_stripflags(){
879     append ASMSTRIPFLAGS "$@"
880 }
881
882 add_extralibs(){
883     prepend extralibs $($ldflags_filter "$@")
884 }
885
886 add_host_cppflags(){
887     append host_cppflags "$@"
888 }
889
890 add_host_cflags(){
891     append host_cflags $($host_cflags_filter "$@")
892 }
893
894 add_host_ldflags(){
895     append host_ldflags $($host_ldflags_filter "$@")
896 }
897
898 add_compat(){
899     append compat_objs $1
900     shift
901     map 'add_cppflags -D$v' "$@"
902 }
903
904 check_cmd(){
905     log "$@"
906     "$@" >> $logfile 2>&1
907 }
908
909 check_stat(){
910     log check_stat "$@"
911     stat "$1" >> $logfile 2>&1
912 }
913
914 cc_o(){
915     eval printf '%s\\n' $CC_O
916 }
917
918 cc_e(){
919     eval printf '%s\\n' $CC_E
920 }
921
922 check_cc(){
923     log check_cc "$@"
924     cat > $TMPC
925     log_file $TMPC
926     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
927 }
928
929 check_cxx(){
930     log check_cxx "$@"
931     cat > $TMPCPP
932     log_file $TMPCPP
933     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
934 }
935
936 check_objcc(){
937     log check_objcc "$@"
938     cat > $TMPM
939     log_file $TMPM
940     check_cmd $objcc -Werror=missing-prototypes $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPM
941 }
942
943 check_cpp(){
944     log check_cpp "$@"
945     cat > $TMPC
946     log_file $TMPC
947     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
948 }
949
950 as_o(){
951     eval printf '%s\\n' $AS_O
952 }
953
954 check_as(){
955     log check_as "$@"
956     cat > $TMPS
957     log_file $TMPS
958     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
959 }
960
961 check_inline_asm(){
962     log check_inline_asm "$@"
963     name="$1"
964     code="$2"
965     shift 2
966     disable $name
967     check_cc "$@" <<EOF && enable $name
968 void foo(void){ __asm__ volatile($code); }
969 EOF
970 }
971
972 check_inline_asm_flags(){
973     log check_inline_asm_flags "$@"
974     name="$1"
975     code="$2"
976     flags=''
977     shift 2
978     while [ "$1" != "" ]; do
979       append flags $1
980       shift
981     done;
982     disable $name
983     cat > $TMPC <<EOF
984 void foo(void){ __asm__ volatile($code); }
985 EOF
986     log_file $TMPC
987     check_cmd $cc $CPPFLAGS $CFLAGS $flags "$@" $CC_C $(cc_o $TMPO) $TMPC &&
988     enable $name && add_cflags $flags && add_asflags $flags && add_ldflags $flags
989 }
990
991 check_insn(){
992     log check_insn "$@"
993     check_inline_asm ${1}_inline "\"$2\""
994     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
995 }
996
997 check_x86asm(){
998     log check_x86asm "$@"
999     echo "$1" > $TMPS
1000     log_file $TMPS
1001     shift 1
1002     check_cmd $x86asmexe $X86ASMFLAGS -Werror "$@" -o $TMPO $TMPS
1003 }
1004
1005 ld_o(){
1006     eval printf '%s\\n' $LD_O
1007 }
1008
1009 check_ld(){
1010     log check_ld "$@"
1011     type=$1
1012     shift 1
1013     flags=$(filter_out '-l*|*.so' $@)
1014     libs=$(filter '-l*|*.so' $@)
1015     check_$type $($cflags_filter $flags) || return
1016     flags=$($ldflags_filter $flags)
1017     libs=$($ldflags_filter $libs)
1018     check_cmd $ld $LDFLAGS $LDEXEFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
1019 }
1020
1021 print_include(){
1022     hdr=$1
1023     test "${hdr%.h}" = "${hdr}" &&
1024         echo "#include $hdr"    ||
1025         echo "#include <$hdr>"
1026 }
1027
1028 check_code(){
1029     log check_code "$@"
1030     check=$1
1031     headers=$2
1032     code=$3
1033     shift 3
1034     {
1035         for hdr in $headers; do
1036             print_include $hdr
1037         done
1038         echo "int main(void) { $code; return 0; }"
1039     } | check_$check "$@"
1040 }
1041
1042 check_cppflags(){
1043     log check_cppflags "$@"
1044     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
1045 #include <stdlib.h>
1046 EOF
1047 }
1048
1049 test_cflags(){
1050     log test_cflags "$@"
1051     set -- $($cflags_filter "$@")
1052     check_cc "$@" <<EOF
1053 int x;
1054 EOF
1055 }
1056
1057 check_cflags(){
1058     log check_cflags "$@"
1059     test_cflags "$@" && add_cflags "$@"
1060 }
1061
1062 check_cxxflags(){
1063     log check_cxxflags "$@"
1064     set -- $($cflags_filter "$@")
1065     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
1066 int x;
1067 EOF
1068 }
1069
1070 test_objcflags(){
1071     log test_objcflags "$@"
1072     set -- $($objcflags_filter "$@")
1073     check_objcc "$@" <<EOF
1074 int x;
1075 EOF
1076 }
1077
1078 check_objcflags(){
1079     log check_objcflags "$@"
1080     test_objcflags "$@" && add_objcflags "$@"
1081 }
1082
1083 test_ldflags(){
1084     log test_ldflags "$@"
1085     check_ld "cc" "$@" <<EOF
1086 int main(void){ return 0; }
1087 EOF
1088 }
1089
1090 check_ldflags(){
1091     log check_ldflags "$@"
1092     test_ldflags "$@" && add_ldflags "$@"
1093 }
1094
1095 test_stripflags(){
1096     log test_stripflags "$@"
1097     # call check_cc to get a fresh TMPO
1098     check_cc <<EOF
1099 int main(void) { return 0; }
1100 EOF
1101     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
1102 }
1103
1104 check_stripflags(){
1105     log check_stripflags "$@"
1106     test_stripflags "$@" && add_stripflags "$@"
1107 }
1108
1109 check_header(){
1110     log check_header "$@"
1111     header=$1
1112     shift
1113     disable_safe $header
1114     check_cpp "$@" <<EOF && enable_safe $header
1115 #include <$header>
1116 int x;
1117 EOF
1118 }
1119
1120 check_header_objcc(){
1121     log check_header_objcc "$@"
1122     rm -f -- "$TMPO"
1123     header=$1
1124     shift
1125     disable_safe $header
1126     {
1127        echo "#include <$header>"
1128        echo "int main(void) { return 0; }"
1129     } | check_objcc && check_stat "$TMPO" && enable_safe $header
1130 }
1131
1132 check_apple_framework(){
1133     log check_apple_framework "$@"
1134     framework="$1"
1135     name="$(tolower $framework)"
1136     header="${framework}/${framework}.h"
1137     disable $name
1138     check_header_objcc $header && enable $name && add_extralibs "-framework $framework"
1139 }
1140
1141 check_func(){
1142     log check_func "$@"
1143     func=$1
1144     shift
1145     disable $func
1146     check_ld "cc" "$@" <<EOF && enable $func
1147 extern int $func();
1148 int main(void){ $func(); }
1149 EOF
1150 }
1151
1152 check_complexfunc(){
1153     log check_complexfunc "$@"
1154     func=$1
1155     narg=$2
1156     shift 2
1157     test $narg = 2 && args="f, g" || args="f * I"
1158     disable $func
1159     check_ld "cc" "$@" <<EOF && enable $func
1160 #include <complex.h>
1161 #include <math.h>
1162 float foo(complex float f, complex float g) { return $func($args); }
1163 int main(void){ return (int) foo; }
1164 EOF
1165 }
1166
1167 check_mathfunc(){
1168     log check_mathfunc "$@"
1169     func=$1
1170     narg=$2
1171     shift 2
1172     test $narg = 2 && args="f, g" || args="f"
1173     disable $func
1174     check_ld "cc" "$@" <<EOF && enable $func
1175 #include <math.h>
1176 float foo(float f, float g) { return $func($args); }
1177 int main(void){ return (int) foo; }
1178 EOF
1179 }
1180
1181 check_func_headers(){
1182     log check_func_headers "$@"
1183     headers=$1
1184     funcs=$2
1185     shift 2
1186     {
1187         for hdr in $headers; do
1188             print_include $hdr
1189         done
1190         echo "#include <stdint.h>"
1191         for func in $funcs; do
1192             echo "long check_$func(void) { return (long) $func; }"
1193         done
1194         echo "int main(void) { int ret = 0;"
1195         # LTO could optimize out the test functions without this
1196         for func in $funcs; do
1197             echo " ret |= ((intptr_t)check_$func) & 0xFFFF;"
1198         done
1199         echo "return ret; }"
1200     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
1201 }
1202
1203 check_class_headers_cpp(){
1204     log check_class_headers_cpp "$@"
1205     headers=$1
1206     classes=$2
1207     shift 2
1208     {
1209         for hdr in $headers; do
1210             echo "#include <$hdr>"
1211         done
1212         echo "int main(void) { "
1213         i=1
1214         for class in $classes; do
1215             echo "$class obj$i;"
1216             i=$(expr $i + 1)
1217         done
1218         echo "return 0; }"
1219     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
1220 }
1221
1222 check_cpp_condition(){
1223     log check_cpp_condition "$@"
1224     header=$1
1225     condition=$2
1226     shift 2
1227     check_cpp "$@" <<EOF
1228 #include <$header>
1229 #if !($condition)
1230 #error "unsatisfied condition: $condition"
1231 #endif
1232 EOF
1233 }
1234
1235 test_cflags_cc(){
1236     log test_cflags_cc "$@"
1237     flags=$1
1238     header=$2
1239     condition=$3
1240     shift 3
1241     set -- $($cflags_filter "$flags")
1242     check_cc "$@" <<EOF
1243 #include <$header>
1244 #if !($condition)
1245 #error "unsatisfied condition: $condition"
1246 #endif
1247 EOF
1248 }
1249
1250 check_lib(){
1251     log check_lib "$@"
1252     name="$1"
1253     headers="$2"
1254     funcs="$3"
1255     shift 3
1256     disable $name
1257     check_func_headers "$headers" "$funcs" "$@" &&
1258         enable $name && add_extralibs "$@"
1259 }
1260
1261 check_lib_cpp(){
1262     log check_lib_cpp "$@"
1263     headers="$1"
1264     classes="$2"
1265     shift 2
1266     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1267 }
1268
1269 check_pkg_config(){
1270     log check_pkg_config "$@"
1271     name="$1"
1272     pkg_version="$2"
1273     pkg="${2%% *}"
1274     headers="$3"
1275     funcs="$4"
1276     shift 4
1277     disable $name
1278     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1279     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1280     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1281     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1282         enable $name &&
1283         set_safe "${pkg}_cflags"    $pkg_cflags &&
1284         set_safe "${pkg}_extralibs" $pkg_libs
1285 }
1286
1287 check_exec(){
1288     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1289 }
1290
1291 check_exec_crash(){
1292     log check_exec_crash "$@"
1293     code=$(cat)
1294
1295     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1296     # are safe but may not be available everywhere.  Thus we use
1297     # raise(SIGTERM) instead.  The check is run in a subshell so we
1298     # can redirect the "Terminated" message from the shell.  SIGBUS
1299     # is not defined by standard C so it is used conditionally.
1300
1301     (check_exec "$@") >> $logfile 2>&1 <<EOF
1302 #include <signal.h>
1303 static void sighandler(int sig){
1304     raise(SIGTERM);
1305 }
1306 int foo(void){
1307     $code
1308 }
1309 int (*func_ptr)(void) = foo;
1310 int main(void){
1311     signal(SIGILL, sighandler);
1312     signal(SIGFPE, sighandler);
1313     signal(SIGSEGV, sighandler);
1314 #ifdef SIGBUS
1315     signal(SIGBUS, sighandler);
1316 #endif
1317     return func_ptr();
1318 }
1319 EOF
1320 }
1321
1322 check_type(){
1323     log check_type "$@"
1324     headers=$1
1325     type=$2
1326     shift 2
1327     disable_safe "$type"
1328     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1329 }
1330
1331 check_struct(){
1332     log check_struct "$@"
1333     headers=$1
1334     struct=$2
1335     member=$3
1336     shift 3
1337     disable_safe "${struct}_${member}"
1338     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1339         enable_safe "${struct}_${member}"
1340 }
1341
1342 check_builtin(){
1343     log check_builtin "$@"
1344     name=$1
1345     headers=$2
1346     builtin=$3
1347     shift 3
1348     disable "$name"
1349     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1350 }
1351
1352 check_compile_assert(){
1353     log check_compile_assert "$@"
1354     name=$1
1355     headers=$2
1356     condition=$3
1357     shift 3
1358     disable "$name"
1359     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1360 }
1361
1362 require(){
1363     log require "$@"
1364     name_version="$1"
1365     name="${1%% *}"
1366     headers="$2"
1367     func="$3"
1368     shift 3
1369     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1370 }
1371
1372 require_cpp(){
1373     name="$1"
1374     headers="$2"
1375     classes="$3"
1376     shift 3
1377     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1378 }
1379
1380 require_header(){
1381     log require "$@"
1382     header="$1"
1383     shift
1384     check_header "$header" "$@" || die "ERROR: $header header not found"
1385 }
1386
1387 require_cpp_condition(){
1388     log require "$@"
1389     header="$1"
1390     condition="$2"
1391     shift 2
1392     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1393 }
1394
1395 use_pkg_config(){
1396     log use_pkg_config "$@"
1397     pkg="${2%% *}"
1398     check_pkg_config "$@" || return 1
1399     add_cflags    $(get_safe "${pkg}_cflags")
1400     add_extralibs $(get_safe "${pkg}_extralibs")
1401 }
1402
1403 require_pkg_config(){
1404     log require_pkg_config "$@"
1405     pkg_version="$2"
1406     use_pkg_config "$@" || die "ERROR: $pkg_version not found using pkg-config$pkg_config_fail_message"
1407 }
1408
1409 hostcc_e(){
1410     eval printf '%s\\n' $HOSTCC_E
1411 }
1412
1413 hostcc_o(){
1414     eval printf '%s\\n' $HOSTCC_O
1415 }
1416
1417 check_host_cc(){
1418     log check_host_cc "$@"
1419     cat > $TMPC
1420     log_file $TMPC
1421     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1422 }
1423
1424 check_host_cpp(){
1425     log check_host_cpp "$@"
1426     cat > $TMPC
1427     log_file $TMPC
1428     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1429 }
1430
1431 check_host_cppflags(){
1432     log check_host_cppflags "$@"
1433     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1434 #include <stdlib.h>
1435 EOF
1436 }
1437
1438 check_host_cflags(){
1439     log check_host_cflags "$@"
1440     set -- $($host_cflags_filter "$@")
1441     check_host_cc "$@" <<EOF && append host_cflags "$@"
1442 int x;
1443 EOF
1444 }
1445
1446 check_host_cpp_condition(){
1447     log check_host_cpp_condition "$@"
1448     header=$1
1449     condition=$2
1450     shift 2
1451     check_host_cpp "$@" <<EOF
1452 #include <$header>
1453 #if !($condition)
1454 #error "unsatisfied condition: $condition"
1455 #endif
1456 EOF
1457 }
1458
1459 cp_if_changed(){
1460     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1461     mkdir -p "$(dirname $2)"
1462     cp -f "$1" "$2"
1463 }
1464
1465 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1466 # system-dependent things.
1467
1468 AVCODEC_COMPONENTS="
1469     bsfs
1470     decoders
1471     encoders
1472     hwaccels
1473     parsers
1474 "
1475
1476 AVDEVICE_COMPONENTS="
1477     indevs
1478     outdevs
1479 "
1480
1481 AVFILTER_COMPONENTS="
1482     filters
1483 "
1484
1485 AVFORMAT_COMPONENTS="
1486     demuxers
1487     muxers
1488     protocols
1489 "
1490
1491 AVRESAMPLE_COMPONENTS=""
1492
1493 AVUTIL_COMPONENTS=""
1494
1495 COMPONENT_LIST="
1496     $AVCODEC_COMPONENTS
1497     $AVDEVICE_COMPONENTS
1498     $AVFILTER_COMPONENTS
1499     $AVFORMAT_COMPONENTS
1500     $AVRESAMPLE_COMPONENTS
1501     $AVUTIL_COMPONENTS
1502 "
1503
1504 EXAMPLE_LIST="
1505     avio_dir_cmd_example
1506     avio_reading_example
1507     decode_audio_example
1508     decode_video_example
1509     demuxing_decoding_example
1510     encode_audio_example
1511     encode_video_example
1512     extract_mvs_example
1513     filter_audio_example
1514     filtering_audio_example
1515     filtering_video_example
1516     http_multiclient_example
1517     hw_decode_example
1518     metadata_example
1519     muxing_example
1520     qsvdec_example
1521     remuxing_example
1522     resampling_audio_example
1523     scaling_video_example
1524     transcode_aac_example
1525     transcoding_example
1526 "
1527
1528 EXTERNAL_AUTODETECT_LIBRARY_LIST="
1529     alsa
1530     appkit
1531     avfoundation
1532     bzlib
1533     coreimage
1534     iconv
1535     jack
1536     libxcb
1537     libxcb_shm
1538     libxcb_shape
1539     libxcb_xfixes
1540     lzma
1541     schannel
1542     sdl2
1543     securetransport
1544     sndio
1545     xlib
1546     zlib
1547 "
1548
1549 EXTERNAL_LIBRARY_GPL_LIST="
1550     avisynth
1551     frei0r
1552     libcdio
1553     librubberband
1554     libvidstab
1555     libx264
1556     libx265
1557     libxavs
1558     libxvid
1559 "
1560
1561 EXTERNAL_LIBRARY_NONFREE_LIST="
1562     decklink
1563     libndi_newtek
1564     libfdk_aac
1565     openssl
1566 "
1567
1568 EXTERNAL_LIBRARY_VERSION3_LIST="
1569     gmp
1570     libopencore_amrnb
1571     libopencore_amrwb
1572     libvo_amrwbenc
1573     rkmpp
1574 "
1575
1576 EXTERNAL_LIBRARY_GPLV3_LIST="
1577     libsmbclient
1578 "
1579
1580 EXTERNAL_LIBRARY_LIST="
1581     $EXTERNAL_AUTODETECT_LIBRARY_LIST
1582     $EXTERNAL_LIBRARY_GPL_LIST
1583     $EXTERNAL_LIBRARY_NONFREE_LIST
1584     $EXTERNAL_LIBRARY_VERSION3_LIST
1585     $EXTERNAL_LIBRARY_GPLV3_LIST
1586     chromaprint
1587     gcrypt
1588     gnutls
1589     jni
1590     ladspa
1591     libass
1592     libbluray
1593     libbs2b
1594     libcaca
1595     libcelt
1596     libdc1394
1597     libdrm
1598     libflite
1599     libfontconfig
1600     libfreetype
1601     libfribidi
1602     libgme
1603     libgsm
1604     libiec61883
1605     libilbc
1606     libkvazaar
1607     libmodplug
1608     libmp3lame
1609     libmysofa
1610     libopencv
1611     libopenh264
1612     libopenjpeg
1613     libopenmpt
1614     libopus
1615     libpulse
1616     librsvg
1617     librtmp
1618     libshine
1619     libsmbclient
1620     libsnappy
1621     libsoxr
1622     libspeex
1623     libssh
1624     libtesseract
1625     libtheora
1626     libtwolame
1627     libv4l2
1628     libvmaf
1629     libvorbis
1630     libvpx
1631     libwavpack
1632     libwebp
1633     libxml2
1634     libzimg
1635     libzmq
1636     libzvbi
1637     mediacodec
1638     openal
1639     opencl
1640     opengl
1641 "
1642
1643 HWACCEL_AUTODETECT_LIBRARY_LIST="
1644     audiotoolbox
1645     crystalhd
1646     cuda
1647     cuvid
1648     d3d11va
1649     dxva2
1650     nvenc
1651     vaapi
1652     vda
1653     vdpau
1654     videotoolbox
1655     v4l2_m2m
1656     xvmc
1657 "
1658
1659 HWACCEL_LIBRARY_NONFREE_LIST="
1660     cuda_sdk
1661     libnpp
1662 "
1663
1664 HWACCEL_LIBRARY_LIST="
1665     $HWACCEL_AUTODETECT_LIBRARY_LIST
1666     $HWACCEL_LIBRARY_NONFREE_LIST
1667     libmfx
1668     mmal
1669     omx
1670 "
1671
1672 DOCUMENT_LIST="
1673     doc
1674     htmlpages
1675     manpages
1676     podpages
1677     txtpages
1678 "
1679
1680 FEATURE_LIST="
1681     ftrapv
1682     gray
1683     hardcoded_tables
1684     omx_rpi
1685     runtime_cpudetect
1686     safe_bitstream_reader
1687     shared
1688     small
1689     static
1690     swscale_alpha
1691 "
1692
1693 LIBRARY_LIST="
1694     avcodec
1695     avdevice
1696     avfilter
1697     avformat
1698     avresample
1699     avutil
1700     postproc
1701     swresample
1702     swscale
1703 "
1704
1705 LICENSE_LIST="
1706     gpl
1707     nonfree
1708     version3
1709 "
1710
1711 PROGRAM_LIST="
1712     ffplay
1713     ffprobe
1714     ffserver
1715     ffmpeg
1716 "
1717
1718 SUBSYSTEM_LIST="
1719     dct
1720     dwt
1721     error_resilience
1722     faan
1723     fast_unaligned
1724     fft
1725     lsp
1726     lzo
1727     mdct
1728     pixelutils
1729     network
1730     rdft
1731 "
1732
1733 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1734 CONFIG_LIST="
1735     $DOCUMENT_LIST
1736     $EXAMPLE_LIST
1737     $EXTERNAL_LIBRARY_LIST
1738     $HWACCEL_LIBRARY_LIST
1739     $FEATURE_LIST
1740     $LICENSE_LIST
1741     $LIBRARY_LIST
1742     $PROGRAM_LIST
1743     $SUBSYSTEM_LIST
1744     autodetect
1745     fontconfig
1746     linux_perf
1747     memory_poisoning
1748     neon_clobber_test
1749     ossfuzz
1750     pic
1751     thumb
1752     valgrind_backtrace
1753     xmm_clobber_test
1754     $COMPONENT_LIST
1755 "
1756
1757 THREADS_LIST="
1758     pthreads
1759     os2threads
1760     w32threads
1761 "
1762
1763 ATOMICS_LIST="
1764     atomics_gcc
1765     atomics_suncc
1766     atomics_win32
1767 "
1768
1769 AUTODETECT_LIBS="
1770     $EXTERNAL_AUTODETECT_LIBRARY_LIST
1771     $HWACCEL_AUTODETECT_LIBRARY_LIST
1772     $THREADS_LIST
1773 "
1774
1775 ARCH_LIST="
1776     aarch64
1777     alpha
1778     arm
1779     avr32
1780     avr32_ap
1781     avr32_uc
1782     bfin
1783     ia64
1784     m68k
1785     mips
1786     mips64
1787     parisc
1788     ppc
1789     ppc64
1790     s390
1791     sh4
1792     sparc
1793     sparc64
1794     tilegx
1795     tilepro
1796     tomi
1797     x86
1798     x86_32
1799     x86_64
1800 "
1801
1802 ARCH_EXT_LIST_ARM="
1803     armv5te
1804     armv6
1805     armv6t2
1806     armv8
1807     neon
1808     vfp
1809     vfpv3
1810     setend
1811 "
1812
1813 ARCH_EXT_LIST_MIPS="
1814     mipsfpu
1815     mips32r2
1816     mips32r5
1817     mips64r2
1818     mips32r6
1819     mips64r6
1820     mipsdsp
1821     mipsdspr2
1822     msa
1823 "
1824
1825 ARCH_EXT_LIST_LOONGSON="
1826     loongson2
1827     loongson3
1828     mmi
1829 "
1830
1831 ARCH_EXT_LIST_X86_SIMD="
1832     aesni
1833     amd3dnow
1834     amd3dnowext
1835     avx
1836     avx2
1837     fma3
1838     fma4
1839     mmx
1840     mmxext
1841     sse
1842     sse2
1843     sse3
1844     sse4
1845     sse42
1846     ssse3
1847     xop
1848 "
1849
1850 ARCH_EXT_LIST_PPC="
1851     altivec
1852     dcbzl
1853     ldbrx
1854     power8
1855     ppc4xx
1856     vsx
1857 "
1858
1859 ARCH_EXT_LIST_X86="
1860     $ARCH_EXT_LIST_X86_SIMD
1861     cpunop
1862     i686
1863 "
1864
1865 ARCH_EXT_LIST="
1866     $ARCH_EXT_LIST_ARM
1867     $ARCH_EXT_LIST_PPC
1868     $ARCH_EXT_LIST_X86
1869     $ARCH_EXT_LIST_MIPS
1870     $ARCH_EXT_LIST_LOONGSON
1871 "
1872
1873 ARCH_FEATURES="
1874     aligned_stack
1875     fast_64bit
1876     fast_clz
1877     fast_cmov
1878     local_aligned_8
1879     local_aligned_16
1880     local_aligned_32
1881     simd_align_16
1882     simd_align_32
1883 "
1884
1885 BUILTIN_LIST="
1886     atomic_cas_ptr
1887     machine_rw_barrier
1888     MemoryBarrier
1889     mm_empty
1890     rdtsc
1891     sarestart
1892     sem_timedwait
1893     sync_val_compare_and_swap
1894 "
1895 HAVE_LIST_CMDLINE="
1896     inline_asm
1897     symver
1898     x86asm
1899 "
1900
1901 HAVE_LIST_PUB="
1902     bigendian
1903     fast_unaligned
1904 "
1905
1906 HEADERS_LIST="
1907     altivec_h
1908     arpa_inet_h
1909     asm_types_h
1910     cdio_paranoia_h
1911     cdio_paranoia_paranoia_h
1912     cuda_h
1913     d3d11_h
1914     dispatch_dispatch_h
1915     dev_bktr_ioctl_bt848_h
1916     dev_bktr_ioctl_meteor_h
1917     dev_ic_bt8xx_h
1918     dev_video_bktr_ioctl_bt848_h
1919     dev_video_meteor_ioctl_meteor_h
1920     direct_h
1921     dirent_h
1922     dlfcn_h
1923     dxgidebug_h
1924     dxva_h
1925     ES2_gl_h
1926     gsm_h
1927     io_h
1928     mach_mach_time_h
1929     machine_ioctl_bt848_h
1930     machine_ioctl_meteor_h
1931     malloc_h
1932     opencv2_core_core_c_h
1933     openjpeg_2_2_openjpeg_h
1934     openjpeg_2_1_openjpeg_h
1935     openjpeg_2_0_openjpeg_h
1936     openjpeg_1_5_openjpeg_h
1937     OpenGL_gl3_h
1938     poll_h
1939     soundcard_h
1940     stdatomic_h
1941     sys_mman_h
1942     sys_param_h
1943     sys_resource_h
1944     sys_select_h
1945     sys_soundcard_h
1946     sys_time_h
1947     sys_un_h
1948     sys_videoio_h
1949     termios_h
1950     udplite_h
1951     unistd_h
1952     valgrind_valgrind_h
1953     windows_h
1954     winsock2_h
1955 "
1956
1957 INTRINSICS_LIST="
1958     intrinsics_neon
1959 "
1960
1961 COMPLEX_FUNCS="
1962     cabs
1963     cexp
1964 "
1965
1966 MATH_FUNCS="
1967     atanf
1968     atan2f
1969     cbrt
1970     cbrtf
1971     copysign
1972     cosf
1973     erf
1974     exp2
1975     exp2f
1976     expf
1977     hypot
1978     isfinite
1979     isinf
1980     isnan
1981     ldexpf
1982     llrint
1983     llrintf
1984     log2
1985     log2f
1986     log10f
1987     lrint
1988     lrintf
1989     powf
1990     rint
1991     round
1992     roundf
1993     sinf
1994     trunc
1995     truncf
1996 "
1997
1998 SYSTEM_FUNCS="
1999     access
2000     aligned_malloc
2001     arc4random
2002     clock_gettime
2003     closesocket
2004     CommandLineToArgvW
2005     CoTaskMemFree
2006     CryptGenRandom
2007     dlopen
2008     fcntl
2009     flt_lim
2010     fork
2011     getaddrinfo
2012     gethrtime
2013     getopt
2014     GetProcessAffinityMask
2015     GetProcessMemoryInfo
2016     GetProcessTimes
2017     getrusage
2018     GetSystemTimeAsFileTime
2019     gettimeofday
2020     glob
2021     glXGetProcAddress
2022     gmtime_r
2023     inet_aton
2024     isatty
2025     jack_port_get_latency_range
2026     kbhit
2027     LoadLibrary
2028     localtime_r
2029     lstat
2030     lzo1x_999_compress
2031     mach_absolute_time
2032     MapViewOfFile
2033     memalign
2034     mkstemp
2035     mmap
2036     mprotect
2037     nanosleep
2038     PeekNamedPipe
2039     posix_memalign
2040     pthread_cancel
2041     sched_getaffinity
2042     SetConsoleTextAttribute
2043     SetConsoleCtrlHandler
2044     setmode
2045     setrlimit
2046     Sleep
2047     strerror_r
2048     sysconf
2049     sysctl
2050     usleep
2051     UTGetOSTypeFromString
2052     VirtualAlloc
2053     wglGetProcAddress
2054 "
2055
2056 TOOLCHAIN_FEATURES="
2057     as_dn_directive
2058     as_fpu_directive
2059     as_func
2060     as_object_arch
2061     asm_mod_q
2062     attribute_may_alias
2063     attribute_packed
2064     blocks_extension
2065     ebp_available
2066     ebx_available
2067     gnu_as
2068     gnu_windres
2069     ibm_asm
2070     inline_asm_direct_symbol_refs
2071     inline_asm_labels
2072     inline_asm_nonlocal_labels
2073     pragma_deprecated
2074     rsync_contimeout
2075     symver_asm_label
2076     symver_gnu_asm
2077     vfp_args
2078     xform_asm
2079     xmm_clobbers
2080 "
2081
2082 TYPES_LIST="
2083     CONDITION_VARIABLE_Ptr
2084     socklen_t
2085     struct_addrinfo
2086     struct_group_source_req
2087     struct_ip_mreq_source
2088     struct_ipv6_mreq
2089     struct_msghdr_msg_flags
2090     struct_pollfd
2091     struct_rusage_ru_maxrss
2092     struct_sctp_event_subscribe
2093     struct_sockaddr_in6
2094     struct_sockaddr_sa_len
2095     struct_sockaddr_storage
2096     struct_stat_st_mtim_tv_nsec
2097     struct_v4l2_frmivalenum_discrete
2098 "
2099
2100 HAVE_LIST="
2101     $ARCH_EXT_LIST
2102     $(add_suffix _external $ARCH_EXT_LIST)
2103     $(add_suffix _inline   $ARCH_EXT_LIST)
2104     $ARCH_FEATURES
2105     $ATOMICS_LIST
2106     $BUILTIN_LIST
2107     $COMPLEX_FUNCS
2108     $HAVE_LIST_CMDLINE
2109     $HAVE_LIST_PUB
2110     $HEADERS_LIST
2111     $INTRINSICS_LIST
2112     $MATH_FUNCS
2113     $SYSTEM_FUNCS
2114     $THREADS_LIST
2115     $TOOLCHAIN_FEATURES
2116     $TYPES_LIST
2117     atomics_native
2118     dos_paths
2119     libc_msvcrt
2120     makeinfo
2121     makeinfo_html
2122     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
2123     perl
2124     pod2man
2125     section_data_rel_ro
2126     texi2html
2127     threads
2128     uwp
2129     vaapi_drm
2130     vaapi_x11
2131     vdpau_x11
2132     winrt
2133 "
2134
2135 # options emitted with CONFIG_ prefix but not available on the command line
2136 CONFIG_EXTRA="
2137     aandcttables
2138     ac3dsp
2139     audio_frame_queue
2140     audiodsp
2141     blockdsp
2142     bswapdsp
2143     cabac
2144     dirac_parse
2145     dvprofile
2146     exif
2147     faandct
2148     faanidct
2149     fdctdsp
2150     flacdsp
2151     fmtconvert
2152     frame_thread_encoder
2153     g722dsp
2154     golomb
2155     gplv3
2156     h263dsp
2157     h264chroma
2158     h264dsp
2159     h264parse
2160     h264pred
2161     h264qpel
2162     hevcparse
2163     hpeldsp
2164     huffman
2165     huffyuvdsp
2166     huffyuvencdsp
2167     idctdsp
2168     iirfilter
2169     mdct15
2170     intrax8
2171     iso_media
2172     ividsp
2173     jpegtables
2174     lgplv3
2175     libx262
2176     llauddsp
2177     llviddsp
2178     llvidencdsp
2179     lpc
2180     lzf
2181     me_cmp
2182     mpeg_er
2183     mpegaudio
2184     mpegaudiodsp
2185     mpegaudioheader
2186     mpegvideo
2187     mpegvideoenc
2188     mss34dsp
2189     pixblockdsp
2190     qpeldsp
2191     qsv
2192     qsvdec
2193     qsvenc
2194     rangecoder
2195     riffdec
2196     riffenc
2197     rtpdec
2198     rtpenc_chain
2199     rv34dsp
2200     sinewin
2201     snappy
2202     srtp
2203     startcode
2204     texturedsp
2205     texturedspenc
2206     tpeldsp
2207     vaapi_encode
2208     vc1dsp
2209     videodsp
2210     vp3dsp
2211     vp56dsp
2212     vp8dsp
2213     wma_freqs
2214     wmv2dsp
2215 "
2216
2217 CMDLINE_SELECT="
2218     $ARCH_EXT_LIST
2219     $CONFIG_LIST
2220     $HAVE_LIST_CMDLINE
2221     $THREADS_LIST
2222     asm
2223     cross_compile
2224     debug
2225     extra_warnings
2226     logging
2227     lto
2228     optimizations
2229     rpath
2230     stripping
2231 "
2232
2233 PATHS_LIST="
2234     bindir
2235     datadir
2236     docdir
2237     incdir
2238     libdir
2239     mandir
2240     pkgconfigdir
2241     prefix
2242     shlibdir
2243     install_name_dir
2244 "
2245
2246 CMDLINE_SET="
2247     $PATHS_LIST
2248     ar
2249     arch
2250     as
2251     assert_level
2252     build_suffix
2253     cc
2254     objcc
2255     cpu
2256     cross_prefix
2257     custom_allocator
2258     cxx
2259     dep_cc
2260     doxygen
2261     env
2262     extra_version
2263     gas
2264     host_cc
2265     host_cflags
2266     host_extralibs
2267     host_ld
2268     host_ldflags
2269     host_os
2270     ignore_tests
2271     install
2272     ld
2273     ln_s
2274     logfile
2275     malloc_prefix
2276     nm
2277     optflags
2278     nvccflags
2279     pkg_config
2280     pkg_config_flags
2281     progs_suffix
2282     random_seed
2283     ranlib
2284     samples
2285     strip
2286     sws_max_filter_size
2287     sysinclude
2288     sysroot
2289     target_exec
2290     target_os
2291     target_path
2292     target_samples
2293     tempprefix
2294     toolchain
2295     valgrind
2296     x86asmexe
2297 "
2298
2299 CMDLINE_APPEND="
2300     extra_cflags
2301     extra_cxxflags
2302     extra_objcflags
2303     host_cppflags
2304 "
2305
2306 # code dependency declarations
2307
2308 # architecture extensions
2309
2310 armv5te_deps="arm"
2311 armv6_deps="arm"
2312 armv6t2_deps="arm"
2313 armv8_deps="aarch64"
2314 neon_deps_any="aarch64 arm"
2315 intrinsics_neon_deps="neon"
2316 vfp_deps_any="aarch64 arm"
2317 vfpv3_deps="vfp"
2318 setend_deps="arm"
2319
2320 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
2321
2322 loongson2_deps="mips"
2323 loongson3_deps="mips"
2324 mipsfpu_deps="mips"
2325 mipsdsp_deps="mips"
2326 mipsdspr2_deps="mips"
2327 mips32r2_deps="mips"
2328 mips32r5_deps="mips"
2329 mips32r6_deps="mips"
2330 mips64r2_deps="mips"
2331 mips64r6_deps="mips"
2332 msa_deps="mipsfpu"
2333 mmi_deps="mips"
2334
2335 altivec_deps="ppc"
2336 dcbzl_deps="ppc"
2337 ldbrx_deps="ppc"
2338 ppc4xx_deps="ppc"
2339 vsx_deps="altivec"
2340 power8_deps="vsx"
2341
2342 cpunop_deps="i686"
2343 x86_64_select="i686"
2344 x86_64_suggest="fast_cmov"
2345
2346 amd3dnow_deps="mmx"
2347 amd3dnowext_deps="amd3dnow"
2348 i686_deps="x86"
2349 mmx_deps="x86"
2350 mmxext_deps="mmx"
2351 sse_deps="mmxext"
2352 sse2_deps="sse"
2353 sse3_deps="sse2"
2354 ssse3_deps="sse3"
2355 sse4_deps="ssse3"
2356 sse42_deps="sse4"
2357 aesni_deps="sse42"
2358 avx_deps="sse42"
2359 xop_deps="avx"
2360 fma3_deps="avx"
2361 fma4_deps="avx"
2362 avx2_deps="avx"
2363
2364 mmx_external_deps="x86asm"
2365 mmx_inline_deps="inline_asm"
2366 mmx_suggest="mmx_external mmx_inline"
2367
2368 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2369     eval dep=\$${ext}_deps
2370     eval ${ext}_external_deps='"${dep}_external"'
2371     eval ${ext}_inline_deps='"${dep}_inline"'
2372     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2373 done
2374
2375 aligned_stack_if_any="aarch64 ppc x86"
2376 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2377 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2378 fast_unaligned_if_any="aarch64 ppc x86"
2379 simd_align_16_if_any="altivec neon sse"
2380 simd_align_32_if_any="avx"
2381
2382 # system capabilities
2383 symver_if_any="symver_asm_label symver_gnu_asm"
2384 valgrind_backtrace_conflict="optimizations"
2385 valgrind_backtrace_deps="valgrind_valgrind_h"
2386
2387 # threading support
2388 atomics_gcc_if="sync_val_compare_and_swap"
2389 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2390 atomics_win32_if="MemoryBarrier"
2391 atomics_native_if_any="$ATOMICS_LIST"
2392 w32threads_deps="atomics_native"
2393 threads_if_any="$THREADS_LIST"
2394
2395 # subsystems
2396 dct_select="rdft"
2397 dirac_parse_select="golomb"
2398 error_resilience_select="me_cmp"
2399 faandct_deps="faan fdctdsp"
2400 faanidct_deps="faan idctdsp"
2401 h264dsp_select="startcode"
2402 hevcparse_select="golomb"
2403 frame_thread_encoder_deps="encoders threads"
2404 intrax8_select="blockdsp idctdsp"
2405 mdct_select="fft"
2406 mdct15_select="fft"
2407 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2408 mpeg_er_select="error_resilience"
2409 mpegaudio_select="mpegaudiodsp mpegaudioheader"
2410 mpegaudiodsp_select="dct"
2411 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp mpeg_er videodsp"
2412 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2413 vc1dsp_select="h264chroma qpeldsp startcode"
2414 rdft_select="fft"
2415
2416 # decoders / encoders
2417 aac_decoder_select="mdct15 mdct sinewin"
2418 aac_fixed_decoder_select="mdct sinewin"
2419 aac_encoder_select="audio_frame_queue iirfilter lpc mdct sinewin"
2420 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2421 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2422 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2423 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2424 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2425 adpcm_g722_decoder_select="g722dsp"
2426 adpcm_g722_encoder_select="g722dsp"
2427 aic_decoder_select="golomb idctdsp"
2428 alac_encoder_select="lpc"
2429 als_decoder_select="bswapdsp"
2430 amrnb_decoder_select="lsp"
2431 amrwb_decoder_select="lsp"
2432 amv_decoder_select="sp5x_decoder exif"
2433 amv_encoder_select="aandcttables jpegtables mpegvideoenc"
2434 ape_decoder_select="bswapdsp llauddsp"
2435 apng_decoder_select="zlib"
2436 apng_encoder_select="llvidencdsp zlib"
2437 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2438 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2439 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2440 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2441 atrac1_decoder_select="mdct sinewin"
2442 atrac3_decoder_select="mdct"
2443 atrac3p_decoder_select="mdct sinewin"
2444 avrn_decoder_select="exif jpegtables"
2445 bink_decoder_select="blockdsp hpeldsp"
2446 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2447 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2448 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2449 clearvideo_decoder_select="idctdsp"
2450 cllc_decoder_select="bswapdsp"
2451 comfortnoise_encoder_select="lpc"
2452 cook_decoder_select="audiodsp mdct sinewin"
2453 cscd_decoder_select="lzo"
2454 cscd_decoder_suggest="zlib"
2455 dca_decoder_select="mdct"
2456 dds_decoder_select="texturedsp"
2457 dirac_decoder_select="dirac_parse dwt golomb videodsp mpegvideoenc"
2458 dnxhd_decoder_select="blockdsp idctdsp"
2459 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2460 dolby_e_decoder_select="mdct"
2461 dvvideo_decoder_select="dvprofile idctdsp"
2462 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2463 dxa_decoder_select="zlib"
2464 dxv_decoder_select="lzf texturedsp"
2465 eac3_decoder_select="ac3_decoder"
2466 eac3_encoder_select="ac3_encoder"
2467 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2468 eatgq_decoder_select="aandcttables"
2469 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2470 exr_decoder_select="zlib"
2471 ffv1_decoder_select="rangecoder"
2472 ffv1_encoder_select="rangecoder"
2473 ffvhuff_decoder_select="huffyuv_decoder"
2474 ffvhuff_encoder_select="huffyuv_encoder"
2475 fic_decoder_select="golomb"
2476 flac_decoder_select="flacdsp"
2477 flac_encoder_select="bswapdsp flacdsp lpc"
2478 flashsv2_decoder_select="zlib"
2479 flashsv2_encoder_select="zlib"
2480 flashsv_decoder_select="zlib"
2481 flashsv_encoder_select="zlib"
2482 flv_decoder_select="h263_decoder"
2483 flv_encoder_select="h263_encoder"
2484 fourxm_decoder_select="blockdsp bswapdsp"
2485 fraps_decoder_select="bswapdsp huffman"
2486 g2m_decoder_select="blockdsp idctdsp jpegtables zlib"
2487 g729_decoder_select="audiodsp"
2488 h261_decoder_select="mpegvideo"
2489 h261_encoder_select="aandcttables mpegvideoenc"
2490 h263_decoder_select="h263_parser h263dsp mpegvideo qpeldsp"
2491 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2492 h263i_decoder_select="h263_decoder"
2493 h263p_decoder_select="h263_decoder"
2494 h263p_encoder_select="h263_encoder"
2495 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2496 h264_decoder_suggest="error_resilience"
2497 hap_decoder_select="snappy texturedsp"
2498 hap_encoder_deps="libsnappy"
2499 hap_encoder_select="texturedspenc"
2500 hevc_decoder_select="bswapdsp cabac golomb hevcparse videodsp"
2501 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2502 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llvidencdsp"
2503 iac_decoder_select="imc_decoder"
2504 imc_decoder_select="bswapdsp fft mdct sinewin"
2505 indeo3_decoder_select="hpeldsp"
2506 indeo4_decoder_select="ividsp"
2507 indeo5_decoder_select="ividsp"
2508 interplay_video_decoder_select="hpeldsp"
2509 jpegls_decoder_select="mjpeg_decoder"
2510 jv_decoder_select="blockdsp"
2511 lagarith_decoder_select="llviddsp"
2512 ljpeg_encoder_select="aandcttables idctdsp jpegtables mpegvideoenc"
2513 magicyuv_decoder_select="llviddsp"
2514 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2515 metasound_decoder_select="lsp mdct sinewin"
2516 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2517 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp jpegtables"
2518 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2519 mjpegb_decoder_select="mjpeg_decoder"
2520 mlp_decoder_select="mlp_parser"
2521 mlp_encoder_select="lpc"
2522 motionpixels_decoder_select="bswapdsp"
2523 mp1_decoder_select="mpegaudio"
2524 mp1float_decoder_select="mpegaudio"
2525 mp2_decoder_select="mpegaudio"
2526 mp2float_decoder_select="mpegaudio"
2527 mp3_decoder_select="mpegaudio"
2528 mp3adu_decoder_select="mpegaudio"
2529 mp3adufloat_decoder_select="mpegaudio"
2530 mp3float_decoder_select="mpegaudio"
2531 mp3on4_decoder_select="mpegaudio"
2532 mp3on4float_decoder_select="mpegaudio"
2533 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2534 mpc8_decoder_select="mpegaudiodsp"
2535 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2536 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2537 mpegvideo_decoder_select="mpegvideo"
2538 mpeg1video_decoder_select="mpegvideo"
2539 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2540 mpeg2video_decoder_select="mpegvideo"
2541 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2542 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2543 mpeg4_encoder_select="h263_encoder"
2544 msa1_decoder_select="mss34dsp"
2545 mscc_decoder_select="zlib"
2546 msmpeg4v1_decoder_select="h263_decoder"
2547 msmpeg4v2_decoder_select="h263_decoder"
2548 msmpeg4v2_encoder_select="h263_encoder"
2549 msmpeg4v3_decoder_select="h263_decoder"
2550 msmpeg4v3_encoder_select="h263_encoder"
2551 mss2_decoder_select="mpegvideo qpeldsp vc1_decoder"
2552 mts2_decoder_select="mss34dsp"
2553 mxpeg_decoder_select="mjpeg_decoder"
2554 nellymoser_decoder_select="mdct sinewin"
2555 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2556 nuv_decoder_select="idctdsp lzo"
2557 on2avc_decoder_select="mdct"
2558 opus_decoder_deps="swresample"
2559 opus_decoder_select="mdct15"
2560 opus_encoder_select="audio_frame_queue mdct15"
2561 png_decoder_select="zlib"
2562 png_encoder_select="llvidencdsp zlib"
2563 prores_decoder_select="blockdsp idctdsp"
2564 prores_encoder_select="fdctdsp"
2565 qcelp_decoder_select="lsp"
2566 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2567 ra_144_decoder_select="audiodsp"
2568 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2569 ralf_decoder_select="golomb"
2570 rawvideo_decoder_select="bswapdsp"
2571 rscc_decoder_select="zlib"
2572 rtjpeg_decoder_select="me_cmp"
2573 rv10_decoder_select="h263_decoder"
2574 rv10_encoder_select="h263_encoder"
2575 rv20_decoder_select="h263_decoder"
2576 rv20_encoder_select="h263_encoder"
2577 rv30_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2578 rv40_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2579 screenpresso_decoder_select="zlib"
2580 shorten_decoder_select="bswapdsp"
2581 sipr_decoder_select="lsp"
2582 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2583 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2584 sonic_decoder_select="golomb rangecoder"
2585 sonic_encoder_select="golomb rangecoder"
2586 sonic_ls_encoder_select="golomb rangecoder"
2587 sp5x_decoder_select="mjpeg_decoder"
2588 srgc_decoder_select="zlib"
2589 svq1_decoder_select="hpeldsp"
2590 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2591 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2592 svq3_decoder_suggest="zlib"
2593 tak_decoder_select="audiodsp"
2594 tdsc_decoder_select="zlib mjpeg_decoder"
2595 theora_decoder_select="vp3_decoder"
2596 thp_decoder_select="mjpeg_decoder"
2597 tiff_decoder_suggest="zlib lzma"
2598 tiff_encoder_suggest="zlib"
2599 truehd_decoder_select="mlp_parser"
2600 truehd_encoder_select="lpc"
2601 truemotion2_decoder_select="bswapdsp"
2602 truespeech_decoder_select="bswapdsp"
2603 tscc_decoder_select="zlib"
2604 twinvq_decoder_select="mdct lsp sinewin"
2605 txd_decoder_select="texturedsp"
2606 utvideo_decoder_select="bswapdsp llviddsp"
2607 utvideo_encoder_select="bswapdsp huffman llvidencdsp"
2608 vble_decoder_select="llviddsp"
2609 vc1_decoder_select="blockdsp h263_decoder h264qpel intrax8 mpegvideo vc1dsp"
2610 vc1_qsv_decoder_deps="libmfx"
2611 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2612 vc1image_decoder_select="vc1_decoder"
2613 vorbis_decoder_select="mdct"
2614 vorbis_encoder_select="mdct"
2615 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2616 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2617 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2618 vp6a_decoder_select="vp6_decoder"
2619 vp6f_decoder_select="vp6_decoder"
2620 vp7_decoder_select="h264pred videodsp vp8dsp"
2621 vp8_decoder_select="h264pred videodsp vp8dsp"
2622 vp9_decoder_select="videodsp vp9_parser"
2623 webp_decoder_select="vp8_decoder exif"
2624 wmalossless_decoder_select="llauddsp"
2625 wmapro_decoder_select="mdct sinewin wma_freqs"
2626 wmav1_decoder_select="mdct sinewin wma_freqs"
2627 wmav1_encoder_select="mdct sinewin wma_freqs"
2628 wmav2_decoder_select="mdct sinewin wma_freqs"
2629 wmav2_encoder_select="mdct sinewin wma_freqs"
2630 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2631 wmv1_decoder_select="h263_decoder"
2632 wmv1_encoder_select="h263_encoder"
2633 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2634 wmv2_encoder_select="h263_encoder wmv2dsp"
2635 wmv3_decoder_select="vc1_decoder"
2636 wmv3image_decoder_select="wmv3_decoder"
2637 xma1_decoder_select="wmapro_decoder"
2638 xma2_decoder_select="wmapro_decoder"
2639 zerocodec_decoder_select="zlib"
2640 zlib_decoder_select="zlib"
2641 zlib_encoder_select="zlib"
2642 zmbv_decoder_select="zlib"
2643 zmbv_encoder_select="zlib"
2644
2645 # hardware accelerators
2646 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2647 cuda_deps_any="dlopen LoadLibrary"
2648 cuvid_deps="cuda"
2649 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder ID3D11VideoContext"
2650 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32"
2651 dxva2_extralibs="-luser32"
2652 vda_framework_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension"
2653 vda_framework_extralibs="-framework VideoDecodeAcceleration"
2654 vda_deps="vda_framework pthreads"
2655 vda_extralibs="-framework CoreFoundation -framework QuartzCore"
2656 videotoolbox_hwaccel_deps="videotoolbox pthreads"
2657 videotoolbox_hwaccel_extralibs="-framework QuartzCore"
2658 xvmc_deps="X11_extensions_XvMClib_h"
2659
2660 h263_vaapi_hwaccel_deps="vaapi"
2661 h263_vaapi_hwaccel_select="h263_decoder"
2662 h263_videotoolbox_hwaccel_deps="videotoolbox"
2663 h263_videotoolbox_hwaccel_select="h263_decoder"
2664 h264_cuvid_hwaccel_deps="cuda cuvid"
2665 h264_cuvid_hwaccel_select="h264_cuvid_decoder"
2666 h264_d3d11va_hwaccel_deps="d3d11va"
2667 h264_d3d11va_hwaccel_select="h264_decoder"
2668 h264_d3d11va2_hwaccel_deps="d3d11va"
2669 h264_d3d11va2_hwaccel_select="h264_decoder"
2670 h264_dxva2_hwaccel_deps="dxva2"
2671 h264_dxva2_hwaccel_select="h264_decoder"
2672 h264_mediacodec_hwaccel_deps="mediacodec"
2673 h264_mmal_hwaccel_deps="mmal"
2674 h264_qsv_hwaccel_deps="libmfx"
2675 h264_vaapi_hwaccel_deps="vaapi"
2676 h264_vaapi_hwaccel_select="h264_decoder"
2677 h264_vda_hwaccel_deps="vda"
2678 h264_vda_hwaccel_select="h264_decoder"
2679 h264_vda_old_hwaccel_deps="vda"
2680 h264_vda_old_hwaccel_select="h264_decoder"
2681 h264_vdpau_hwaccel_deps="vdpau"
2682 h264_vdpau_hwaccel_select="h264_decoder"
2683 h264_videotoolbox_hwaccel_deps="videotoolbox"
2684 h264_videotoolbox_hwaccel_select="h264_decoder"
2685 hevc_cuvid_hwaccel_deps="cuda cuvid"
2686 hevc_cuvid_hwaccel_select="hevc_cuvid_decoder"
2687 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2688 hevc_d3d11va_hwaccel_select="hevc_decoder"
2689 hevc_mediacodec_hwaccel_deps="mediacodec"
2690 hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2691 hevc_d3d11va2_hwaccel_select="hevc_decoder"
2692 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2693 hevc_dxva2_hwaccel_select="hevc_decoder"
2694 hevc_qsv_hwaccel_deps="libmfx"
2695 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2696 hevc_vaapi_hwaccel_select="hevc_decoder"
2697 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2698 hevc_vdpau_hwaccel_select="hevc_decoder"
2699 mjpeg_cuvid_hwaccel_deps="cuda cuvid"
2700 mjpeg_cuvid_hwaccel_select="mjpeg_cuvid_decoder"
2701 mpeg_xvmc_hwaccel_deps="xvmc"
2702 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2703 mpeg1_cuvid_hwaccel_deps="cuda cuvid"
2704 mpeg1_cuvid_hwaccel_select="mpeg1_cuvid_decoder"
2705 mpeg1_vdpau_hwaccel_deps="vdpau"
2706 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2707 mpeg1_videotoolbox_hwaccel_deps="videotoolbox"
2708 mpeg1_videotoolbox_hwaccel_select="mpeg1video_decoder"
2709 mpeg1_xvmc_hwaccel_deps="xvmc"
2710 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2711 mpeg2_cuvid_hwaccel_deps="cuda cuvid"
2712 mpeg2_cuvid_hwaccel_select="mpeg2_cuvid_decoder"
2713 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2714 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2715 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2716 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2717 mpeg2_dxva2_hwaccel_deps="dxva2"
2718 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2719 mpeg2_mediacodec_hwaccel_deps="mediacodec"
2720 mpeg2_mmal_hwaccel_deps="mmal"
2721 mpeg2_qsv_hwaccel_deps="libmfx"
2722 mpeg2_qsv_hwaccel_select="qsvdec_mpeg2"
2723 mpeg2_vaapi_hwaccel_deps="vaapi"
2724 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2725 mpeg2_vdpau_hwaccel_deps="vdpau"
2726 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2727 mpeg2_videotoolbox_hwaccel_deps="videotoolbox"
2728 mpeg2_videotoolbox_hwaccel_select="mpeg2video_decoder"
2729 mpeg2_xvmc_hwaccel_deps="xvmc"
2730 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2731 mpeg4_cuvid_hwaccel_deps="cuda cuvid"
2732 mpeg4_cuvid_hwaccel_select="mpeg4_cuvid_decoder"
2733 mpeg4_mediacodec_hwaccel_deps="mediacodec"
2734 mpeg4_mmal_hwaccel_deps="mmal"
2735 mpeg4_vaapi_hwaccel_deps="vaapi"
2736 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2737 mpeg4_vdpau_hwaccel_deps="vdpau"
2738 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2739 mpeg4_videotoolbox_hwaccel_deps="videotoolbox"
2740 mpeg4_videotoolbox_hwaccel_select="mpeg4_decoder"
2741 vc1_cuvid_hwaccel_deps="cuda cuvid"
2742 vc1_cuvid_hwaccel_select="vc1_cuvid_decoder"
2743 vc1_d3d11va_hwaccel_deps="d3d11va"
2744 vc1_d3d11va_hwaccel_select="vc1_decoder"
2745 vc1_d3d11va2_hwaccel_deps="d3d11va"
2746 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2747 vc1_dxva2_hwaccel_deps="dxva2"
2748 vc1_dxva2_hwaccel_select="vc1_decoder"
2749 vc1_mmal_hwaccel_deps="mmal"
2750 vc1_qsv_hwaccel_deps="libmfx"
2751 vc1_qsv_hwaccel_select="qsvdec_vc1"
2752 vc1_vaapi_hwaccel_deps="vaapi"
2753 vc1_vaapi_hwaccel_select="vc1_decoder"
2754 vc1_vdpau_hwaccel_deps="vdpau"
2755 vc1_vdpau_hwaccel_select="vc1_decoder"
2756 vp8_cuvid_hwaccel_deps="cuda cuvid"
2757 vp8_cuvid_hwaccel_select="vp8_cuvid_decoder"
2758 vp9_cuvid_hwaccel_deps="cuda cuvid"
2759 vp9_cuvid_hwaccel_select="vp9_cuvid_decoder"
2760 vp8_mediacodec_hwaccel_deps="mediacodec"
2761 vp8_qsv_hwaccel_deps="libmfx"
2762 vp9_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2763 vp9_d3d11va_hwaccel_select="vp9_decoder"
2764 vp9_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2765 vp9_d3d11va2_hwaccel_select="vp9_decoder"
2766 vp9_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_VP9"
2767 vp9_dxva2_hwaccel_select="vp9_decoder"
2768 vp9_mediacodec_hwaccel_deps="mediacodec"
2769 vp9_vaapi_hwaccel_deps="vaapi VADecPictureParameterBufferVP9_bit_depth"
2770 vp9_vaapi_hwaccel_select="vp9_decoder"
2771 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2772 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2773 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2774 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2775 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2776
2777 # hardware-accelerated codecs
2778 omx_deps="dlopen pthreads"
2779 omx_extralibs='$ldl'
2780 omx_rpi_select="omx"
2781 qsvdec_select="qsv"
2782 qsvenc_select="qsv"
2783 vaapi_encode_deps="vaapi"
2784 v4l2_m2m_deps_any="linux_videodev2_h"
2785
2786 hwupload_cuda_filter_deps="cuda"
2787 scale_npp_filter_deps="cuda libnpp"
2788 scale_cuda_filter_deps="cuda_sdk"
2789 thumbnail_cuda_filter_deps="cuda_sdk"
2790
2791 nvenc_deps="cuda"
2792 nvenc_deps_any="dlopen LoadLibrary"
2793 nvenc_encoder_deps="nvenc"
2794
2795 h263_v4l2m2m_decoder_deps="v4l2_m2m h263_v4l2_m2m"
2796 h263_v4l2m2m_encoder_deps="v4l2_m2m h263_v4l2_m2m"
2797 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2798 h264_cuvid_decoder_deps="cuda cuvid"
2799 h264_cuvid_decoder_select="h264_mp4toannexb_bsf"
2800 h264_mediacodec_decoder_deps="mediacodec"
2801 h264_mediacodec_decoder_select="h264_mp4toannexb_bsf h264_parser"
2802 h264_mmal_decoder_deps="mmal"
2803 h264_nvenc_encoder_deps="nvenc"
2804 h264_omx_encoder_deps="omx"
2805 h264_qsv_decoder_deps="libmfx"
2806 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2807 h264_qsv_encoder_deps="libmfx"
2808 h264_qsv_encoder_select="qsvenc"
2809 h264_rkmpp_decoder_deps="rkmpp"
2810 h264_rkmpp_decoder_select="h264_mp4toannexb_bsf"
2811 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2812 h264_vaapi_encoder_select="vaapi_encode golomb"
2813 h264_vda_decoder_deps="vda"
2814 h264_vda_decoder_select="h264_decoder"
2815 h264_vdpau_decoder_deps="vdpau"
2816 h264_vdpau_decoder_select="h264_decoder"
2817 h264_v4l2m2m_decoder_deps="v4l2_m2m h264_v4l2_m2m"
2818 h264_v4l2m2m_encoder_deps="v4l2_m2m h264_v4l2_m2m"
2819 hevc_cuvid_decoder_deps="cuda cuvid"
2820 hevc_cuvid_decoder_select="hevc_mp4toannexb_bsf"
2821 hevc_mediacodec_decoder_deps="mediacodec"
2822 hevc_mediacodec_decoder_select="hevc_mp4toannexb_bsf hevc_parser"
2823 hevc_nvenc_encoder_deps="nvenc"
2824 hevc_qsv_decoder_deps="libmfx"
2825 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
2826 hevc_qsv_encoder_deps="libmfx"
2827 hevc_qsv_encoder_select="hevcparse qsvenc"
2828 hevc_rkmpp_decoder_deps="rkmpp"
2829 hevc_rkmpp_decoder_select="hevc_mp4toannexb_bsf"
2830 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2831 hevc_vaapi_encoder_select="vaapi_encode golomb"
2832 hevc_v4l2m2m_decoder_deps="v4l2_m2m hevc_v4l2_m2m"
2833 hevc_v4l2m2m_encoder_deps="v4l2_m2m hevc_v4l2_m2m"
2834 mjpeg_cuvid_decoder_deps="cuda cuvid"
2835 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2836 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2837 mpeg1_cuvid_decoder_deps="cuda cuvid"
2838 mpeg1_vdpau_decoder_deps="vdpau"
2839 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2840 mpeg1_v4l2m2m_decoder_deps="v4l2_m2m mpeg1_v4l2_m2m"
2841 mpeg2_crystalhd_decoder_select="crystalhd"
2842 mpeg2_cuvid_decoder_deps="cuda cuvid"
2843 mpeg2_mmal_decoder_deps="mmal"
2844 mpeg2_mediacodec_decoder_deps="mediacodec"
2845 mpeg2_qsv_decoder_deps="libmfx"
2846 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel"
2847 mpeg2_qsv_encoder_deps="libmfx"
2848 mpeg2_qsv_encoder_select="qsvenc"
2849 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2850 mpeg2_vaapi_encoder_select="vaapi_encode"
2851 mpeg2_v4l2m2m_decoder_deps="v4l2_m2m mpeg2_v4l2_m2m"
2852 mpeg4_crystalhd_decoder_select="crystalhd"
2853 mpeg4_cuvid_decoder_deps="cuda cuvid"
2854 mpeg4_mediacodec_decoder_deps="mediacodec"
2855 mpeg4_mmal_decoder_deps="mmal"
2856 mpeg4_omx_encoder_deps="omx"
2857 mpeg4_vdpau_decoder_deps="vdpau"
2858 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2859 mpeg4_v4l2m2m_decoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
2860 mpeg4_v4l2m2m_encoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
2861 mpeg_vdpau_decoder_deps="vdpau"
2862 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2863 msmpeg4_crystalhd_decoder_select="crystalhd"
2864 nvenc_h264_encoder_select="h264_nvenc_encoder"
2865 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2866 vc1_crystalhd_decoder_select="crystalhd"
2867 vc1_cuvid_decoder_deps="cuda cuvid"
2868 vc1_mmal_decoder_deps="mmal"
2869 vc1_vdpau_decoder_deps="vdpau"
2870 vc1_vdpau_decoder_select="vc1_decoder"
2871 vc1_v4l2m2m_decoder_deps="v4l2_m2m vc1_v4l2_m2m"
2872 vp8_cuvid_decoder_deps="cuda cuvid"
2873 vp8_mediacodec_decoder_deps="mediacodec"
2874 vp8_qsv_decoder_deps="libmfx"
2875 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2876 vp8_rkmpp_decoder_deps="rkmpp"
2877 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2878 vp8_vaapi_encoder_select="vaapi_encode"
2879 vp8_v4l2m2m_decoder_deps="v4l2_m2m vp8_v4l2_m2m"
2880 vp8_v4l2m2m_encoder_deps="v4l2_m2m vp8_v4l2_m2m"
2881 vp9_cuvid_decoder_deps="cuda cuvid"
2882 vp9_mediacodec_decoder_deps="mediacodec"
2883 vp9_rkmpp_decoder_deps="rkmpp"
2884 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2885 vp9_vaapi_encoder_select="vaapi_encode"
2886 vp9_v4l2m2m_decoder_deps="v4l2_m2m vp9_v4l2_m2m"
2887 wmv3_crystalhd_decoder_select="crystalhd"
2888 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2889
2890 # parsers
2891 h264_parser_select="golomb h264dsp h264parse"
2892 hevc_parser_select="hevcparse"
2893 mpegaudio_parser_select="mpegaudioheader"
2894 mpegvideo_parser_select="mpegvideo"
2895 mpeg4video_parser_select="h263dsp mpegvideo qpeldsp"
2896 vc1_parser_select="vc1dsp"
2897
2898 # bitstream_filters
2899 mjpeg2jpeg_bsf_select="jpegtables"
2900
2901 # external libraries
2902 aac_at_decoder_deps="audiotoolbox"
2903 ac3_at_decoder_deps="audiotoolbox"
2904 ac3_at_decoder_select="ac3_parser"
2905 adpcm_ima_qt_at_decoder_deps="audiotoolbox"
2906 alac_at_decoder_deps="audiotoolbox"
2907 amr_nb_at_decoder_deps="audiotoolbox"
2908 avisynth_deps_any="dlopen LoadLibrary"
2909 avisynth_demuxer_deps="avisynth"
2910 avisynth_demuxer_select="riffdec"
2911 eac3_at_decoder_deps="audiotoolbox"
2912 eac3_at_decoder_select="ac3_parser"
2913 gsm_ms_at_decoder_deps="audiotoolbox"
2914 ilbc_at_decoder_deps="audiotoolbox"
2915 mp1_at_decoder_deps="audiotoolbox"
2916 mp2_at_decoder_deps="audiotoolbox"
2917 mp3_at_decoder_deps="audiotoolbox"
2918 mp1_at_decoder_select="mpegaudioheader"
2919 mp2_at_decoder_select="mpegaudioheader"
2920 mp3_at_decoder_select="mpegaudioheader"
2921 pcm_alaw_at_decoder_deps="audiotoolbox"
2922 pcm_mulaw_at_decoder_deps="audiotoolbox"
2923 qdmc_at_decoder_deps="audiotoolbox"
2924 qdm2_at_decoder_deps="audiotoolbox"
2925 aac_at_encoder_deps="audiotoolbox"
2926 aac_at_encoder_select="audio_frame_queue"
2927 alac_at_encoder_deps="audiotoolbox"
2928 alac_at_encoder_select="audio_frame_queue"
2929 ilbc_at_encoder_deps="audiotoolbox"
2930 ilbc_at_encoder_select="audio_frame_queue"
2931 pcm_alaw_at_encoder_deps="audiotoolbox"
2932 pcm_alaw_at_encoder_select="audio_frame_queue"
2933 pcm_mulaw_at_encoder_deps="audiotoolbox"
2934 pcm_mulaw_at_encoder_select="audio_frame_queue"
2935 chromaprint_muxer_deps="chromaprint"
2936 h264_videotoolbox_encoder_deps="videotoolbox_encoder pthreads"
2937 libcelt_decoder_deps="libcelt"
2938 libfdk_aac_decoder_deps="libfdk_aac"
2939 libfdk_aac_encoder_deps="libfdk_aac"
2940 libfdk_aac_encoder_select="audio_frame_queue"
2941 libgme_demuxer_deps="libgme"
2942 libgsm_decoder_deps="libgsm"
2943 libgsm_encoder_deps="libgsm"
2944 libgsm_ms_decoder_deps="libgsm"
2945 libgsm_ms_encoder_deps="libgsm"
2946 libilbc_decoder_deps="libilbc"
2947 libilbc_encoder_deps="libilbc"
2948 libkvazaar_encoder_deps="libkvazaar"
2949 libmodplug_demuxer_deps="libmodplug"
2950 libmp3lame_encoder_deps="libmp3lame"
2951 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2952 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2953 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2954 libopencore_amrnb_encoder_select="audio_frame_queue"
2955 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2956 libopenh264_decoder_deps="libopenh264"
2957 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2958 libopenh264_encoder_deps="libopenh264"
2959 libopenjpeg_decoder_deps="libopenjpeg"
2960 libopenjpeg_encoder_deps="libopenjpeg"
2961 libopenmpt_demuxer_deps="libopenmpt"
2962 libopus_decoder_deps="libopus"
2963 libopus_encoder_deps="libopus"
2964 libopus_encoder_select="audio_frame_queue"
2965 librsvg_decoder_deps="librsvg"
2966 libshine_encoder_deps="libshine"
2967 libshine_encoder_select="audio_frame_queue"
2968 libspeex_decoder_deps="libspeex"
2969 libspeex_encoder_deps="libspeex"
2970 libspeex_encoder_select="audio_frame_queue"
2971 libtheora_encoder_deps="libtheora"
2972 libtwolame_encoder_deps="libtwolame"
2973 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2974 libvorbis_decoder_deps="libvorbis"
2975 libvorbis_encoder_deps="libvorbis"
2976 libvorbis_encoder_select="audio_frame_queue"
2977 libvpx_vp8_decoder_deps="libvpx"
2978 libvpx_vp8_encoder_deps="libvpx"
2979 libvpx_vp9_decoder_deps="libvpx"
2980 libvpx_vp9_encoder_deps="libvpx"
2981 libwavpack_encoder_deps="libwavpack"
2982 libwavpack_encoder_select="audio_frame_queue"
2983 libwebp_encoder_deps="libwebp"
2984 libwebp_anim_encoder_deps="libwebp"
2985 libx262_encoder_deps="libx262"
2986 libx264_encoder_deps="libx264"
2987 libx264rgb_encoder_deps="libx264 x264_csp_bgr"
2988 libx264rgb_encoder_select="libx264_encoder"
2989 libx265_encoder_deps="libx265"
2990 libxavs_encoder_deps="libxavs"
2991 libxvid_encoder_deps="libxvid"
2992 libzvbi_teletext_decoder_deps="libzvbi"
2993 videotoolbox_extralibs="-framework CoreFoundation -framework VideoToolbox -framework CoreMedia -framework CoreVideo"
2994 videotoolbox_encoder_deps="videotoolbox VTCompressionSessionPrepareToEncodeFrames"
2995 videotoolbox_encoder_suggest="vda_framework"
2996
2997 # demuxers / muxers
2998 ac3_demuxer_select="ac3_parser"
2999 aiff_muxer_select="iso_media"
3000 asf_demuxer_select="riffdec"
3001 asf_o_demuxer_select="riffdec"
3002 asf_muxer_select="riffenc"
3003 asf_stream_muxer_select="asf_muxer"
3004 avi_demuxer_select="iso_media riffdec exif"
3005 avi_muxer_select="riffenc"
3006 caf_demuxer_select="iso_media riffdec"
3007 caf_muxer_select="iso_media"
3008 dash_muxer_select="mp4_muxer"
3009 dash_demuxer_deps="libxml2"
3010 dirac_demuxer_select="dirac_parser"
3011 dts_demuxer_select="dca_parser"
3012 dtshd_demuxer_select="dca_parser"
3013 dv_demuxer_select="dvprofile"
3014 dv_muxer_select="dvprofile"
3015 dxa_demuxer_select="riffdec"
3016 eac3_demuxer_select="ac3_parser"
3017 f4v_muxer_select="mov_muxer"
3018 fifo_muxer_deps="threads"
3019 flac_demuxer_select="flac_parser"
3020 hds_muxer_select="flv_muxer"
3021 hls_muxer_select="mpegts_muxer"
3022 image2_alias_pix_demuxer_select="image2_demuxer"
3023 image2_brender_pix_demuxer_select="image2_demuxer"
3024 ipod_muxer_select="mov_muxer"
3025 ismv_muxer_select="mov_muxer"
3026 matroska_audio_muxer_select="matroska_muxer"
3027 matroska_demuxer_select="iso_media riffdec"
3028 matroska_demuxer_suggest="bzlib lzo zlib"
3029 matroska_muxer_select="iso_media riffenc"
3030 mmf_muxer_select="riffenc"
3031 mov_demuxer_select="iso_media riffdec"
3032 mov_demuxer_suggest="zlib"
3033 mov_muxer_select="iso_media riffenc rtpenc_chain"
3034 mp3_demuxer_select="mpegaudio_parser"
3035 mp3_muxer_select="mpegaudioheader"
3036 mp4_muxer_select="mov_muxer"
3037 mpegts_demuxer_select="iso_media"
3038 mpegts_muxer_select="adts_muxer latm_muxer"
3039 mpegtsraw_demuxer_select="mpegts_demuxer"
3040 mxf_d10_muxer_select="mxf_muxer"
3041 mxf_opatom_muxer_select="mxf_muxer"
3042 nut_muxer_select="riffenc"
3043 nuv_demuxer_select="riffdec"
3044 oga_muxer_select="ogg_muxer"
3045 ogg_demuxer_select="dirac_parse"
3046 ogv_muxer_select="ogg_muxer"
3047 opus_muxer_select="ogg_muxer"
3048 psp_muxer_select="mov_muxer"
3049 rtp_demuxer_select="sdp_demuxer"
3050 rtp_muxer_select="golomb"
3051 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
3052 rtsp_demuxer_select="http_protocol rtpdec"
3053 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
3054 sap_demuxer_select="sdp_demuxer"
3055 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
3056 sdp_demuxer_select="rtpdec"
3057 smoothstreaming_muxer_select="ismv_muxer"
3058 spdif_muxer_select="aac_parser"
3059 spx_muxer_select="ogg_muxer"
3060 swf_demuxer_suggest="zlib"
3061 tak_demuxer_select="tak_parser"
3062 tg2_muxer_select="mov_muxer"
3063 tgp_muxer_select="mov_muxer"
3064 vobsub_demuxer_select="mpegps_demuxer"
3065 w64_demuxer_select="wav_demuxer"
3066 w64_muxer_select="wav_muxer"
3067 wav_demuxer_select="riffdec"
3068 wav_muxer_select="riffenc"
3069 webm_muxer_select="iso_media riffenc"
3070 webm_dash_manifest_demuxer_select="matroska_demuxer"
3071 wtv_demuxer_select="mpegts_demuxer riffdec"
3072 wtv_muxer_select="mpegts_muxer riffenc"
3073 xmv_demuxer_select="riffdec"
3074 xwma_demuxer_select="riffdec"
3075
3076 # indevs / outdevs
3077 alsa_indev_deps="alsa"
3078 alsa_outdev_deps="alsa"
3079 avfoundation_indev_deps="avfoundation pthreads"
3080 avfoundation_indev_extralibs="-framework Foundation -framework CoreVideo -framework CoreMedia"
3081 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
3082 caca_outdev_deps="libcaca"
3083 decklink_indev_deps="decklink threads"
3084 decklink_indev_extralibs="-lstdc++"
3085 decklink_outdev_deps="decklink threads"
3086 decklink_outdev_extralibs="-lstdc++"
3087 libndi_newtek_indev_deps="libndi_newtek"
3088 libndi_newtek_indev_extralibs="-lndi"
3089 libndi_newtek_outdev_deps="libndi_newtek"
3090 libndi_newtek_outdev_extralibs="-lndi"
3091 dshow_indev_deps="IBaseFilter"
3092 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi"
3093 fbdev_indev_deps="linux_fb_h"
3094 fbdev_outdev_deps="linux_fb_h"
3095 gdigrab_indev_deps="CreateDIBSection"
3096 gdigrab_indev_extralibs="-lgdi32"
3097 gdigrab_indev_select="bmp_decoder"
3098 iec61883_indev_deps="libiec61883"
3099 jack_indev_deps="jack"
3100 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
3101 kmsgrab_indev_deps="libdrm"
3102 lavfi_indev_deps="avfilter"
3103 libcdio_indev_deps="libcdio"
3104 libdc1394_indev_deps="libdc1394"
3105 libv4l2_indev_deps="libv4l2"
3106 openal_indev_deps="openal"
3107 opengl_outdev_deps="opengl"
3108 oss_indev_deps_any="soundcard_h sys_soundcard_h"
3109 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
3110 pulse_indev_deps="libpulse"
3111 pulse_outdev_deps="libpulse"
3112 sdl2_outdev_deps="sdl2"
3113 sndio_indev_deps="sndio"
3114 sndio_outdev_deps="sndio"
3115 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
3116 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
3117 vfwcap_indev_deps="vfw32 vfwcap_defines"
3118 xcbgrab_indev_deps="libxcb"
3119 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
3120 xv_outdev_extralibs="-lXv -lX11 -lXext"
3121
3122 # protocols
3123 async_protocol_deps="threads"
3124 bluray_protocol_deps="libbluray"
3125 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
3126 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
3127 ffrtmpcrypt_protocol_select="tcp_protocol"
3128 ffrtmphttp_protocol_conflict="librtmp_protocol"
3129 ffrtmphttp_protocol_select="http_protocol"
3130 ftp_protocol_select="tcp_protocol"
3131 gopher_protocol_select="network"
3132 http_protocol_select="tcp_protocol"
3133 httpproxy_protocol_select="tcp_protocol"
3134 https_protocol_select="tls_protocol"
3135 icecast_protocol_select="http_protocol"
3136 librtmp_protocol_deps="librtmp"
3137 librtmpe_protocol_deps="librtmp"
3138 librtmps_protocol_deps="librtmp"
3139 librtmpt_protocol_deps="librtmp"
3140 librtmpte_protocol_deps="librtmp"
3141 libsmbclient_protocol_deps="libsmbclient gplv3"
3142 libssh_protocol_deps="libssh"
3143 mmsh_protocol_select="http_protocol"
3144 mmst_protocol_select="network"
3145 rtmp_protocol_conflict="librtmp_protocol"
3146 rtmp_protocol_select="tcp_protocol"
3147 rtmpe_protocol_select="ffrtmpcrypt_protocol"
3148 rtmps_protocol_conflict="librtmp_protocol"
3149 rtmps_protocol_select="tls_protocol"
3150 rtmpt_protocol_select="ffrtmphttp_protocol"
3151 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
3152 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
3153 rtp_protocol_select="udp_protocol"
3154 sctp_protocol_deps="struct_sctp_event_subscribe struct_msghdr_msg_flags"
3155 sctp_protocol_select="network"
3156 srtp_protocol_select="rtp_protocol srtp"
3157 tcp_protocol_select="network"
3158 tls_gnutls_protocol_conflict="tls_schannel_protocol tls_securetransport_protocol"
3159 tls_gnutls_protocol_deps="gnutls"
3160 tls_gnutls_protocol_select="tcp_protocol"
3161 tls_openssl_protocol_conflict="tls_schannel_protocol tls_securetransport_protocol tls_gnutls_protocol"
3162 tls_openssl_protocol_deps="openssl"
3163 tls_openssl_protocol_select="tcp_protocol"
3164 tls_schannel_protocol_deps="schannel"
3165 tls_schannel_protocol_select="tcp_protocol"
3166 tls_securetransport_protocol_deps="securetransport"
3167 tls_securetransport_protocol_select="tcp_protocol"
3168 tls_protocol_deps_any="tls_schannel_protocol tls_securetransport_protocol tls_gnutls_protocol tls_openssl_protocol"
3169 udp_protocol_select="network"
3170 udplite_protocol_select="network"
3171 unix_protocol_deps="sys_un_h"
3172 unix_protocol_select="network"
3173
3174 # filters
3175 afftfilt_filter_deps="avcodec"
3176 afftfilt_filter_select="fft"
3177 afir_filter_deps="avcodec"
3178 afir_filter_select="fft"
3179 amovie_filter_deps="avcodec avformat"
3180 aresample_filter_deps="swresample"
3181 ass_filter_deps="libass"
3182 atempo_filter_deps="avcodec"
3183 atempo_filter_select="rdft"
3184 azmq_filter_deps="libzmq"
3185 blackframe_filter_deps="gpl"
3186 boxblur_filter_deps="gpl"
3187 bs2b_filter_deps="libbs2b"
3188 colormatrix_filter_deps="gpl"
3189 coreimage_filter_deps="coreimage appkit"
3190 coreimage_filter_extralibs="-framework OpenGL"
3191 coreimagesrc_filter_deps="coreimage appkit"
3192 coreimagesrc_filter_extralibs="-framework OpenGL"
3193 cover_rect_filter_deps="avcodec avformat gpl"
3194 cropdetect_filter_deps="gpl"
3195 deinterlace_qsv_filter_deps="libmfx"
3196 deinterlace_vaapi_filter_deps="vaapi"
3197 delogo_filter_deps="gpl"
3198 deshake_filter_select="pixelutils"
3199 drawtext_filter_deps="libfreetype"
3200 elbg_filter_deps="avcodec"
3201 eq_filter_deps="gpl"
3202 fftfilt_filter_deps="avcodec"
3203 fftfilt_filter_select="rdft"
3204 find_rect_filter_deps="avcodec avformat gpl"
3205 firequalizer_filter_deps="avcodec"
3206 firequalizer_filter_select="rdft"
3207 flite_filter_deps="libflite"
3208 framerate_filter_select="pixelutils"
3209 frei0r_filter_deps="frei0r dlopen"
3210 frei0r_src_filter_deps="frei0r dlopen"
3211 fspp_filter_deps="gpl"
3212 geq_filter_deps="gpl"
3213 histeq_filter_deps="gpl"
3214 hqdn3d_filter_deps="gpl"
3215 interlace_filter_deps="gpl"
3216 kerndeint_filter_deps="gpl"
3217 ladspa_filter_deps="ladspa dlopen"
3218 mcdeint_filter_deps="avcodec gpl"
3219 movie_filter_deps="avcodec avformat"
3220 mpdecimate_filter_deps="gpl"
3221 mpdecimate_filter_select="pixelutils"
3222 mptestsrc_filter_deps="gpl"
3223 negate_filter_deps="lut_filter"
3224 nnedi_filter_deps="gpl"
3225 ocr_filter_deps="libtesseract"
3226 ocv_filter_deps="libopencv"
3227 owdenoise_filter_deps="gpl"
3228 pan_filter_deps="swresample"
3229 perspective_filter_deps="gpl"
3230 phase_filter_deps="gpl"
3231 pp7_filter_deps="gpl"
3232 pp_filter_deps="gpl postproc"
3233 pullup_filter_deps="gpl"
3234 removelogo_filter_deps="avcodec avformat swscale"
3235 repeatfields_filter_deps="gpl"
3236 resample_filter_deps="avresample"
3237 rubberband_filter_deps="librubberband"
3238 sab_filter_deps="gpl swscale"
3239 scale2ref_filter_deps="swscale"
3240 scale_filter_deps="swscale"
3241 scale_qsv_filter_deps="libmfx"
3242 select_filter_select="pixelutils"
3243 showcqt_filter_deps="avcodec avformat swscale"
3244 showcqt_filter_select="fft"
3245 showfreqs_filter_deps="avcodec"
3246 showfreqs_filter_select="fft"
3247 showspectrum_filter_deps="avcodec"
3248 showspectrum_filter_select="fft"
3249 showspectrumpic_filter_deps="avcodec"
3250 showspectrumpic_filter_select="fft"
3251 signature_filter_deps="gpl avcodec avformat"
3252 smartblur_filter_deps="gpl swscale"
3253 sofalizer_filter_deps="libmysofa avcodec"
3254 sofalizer_filter_select="fft"
3255 spectrumsynth_filter_deps="avcodec"
3256 spectrumsynth_filter_select="fft"
3257 spp_filter_deps="gpl avcodec"
3258 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
3259 stereo3d_filter_deps="gpl"
3260 subtitles_filter_deps="avformat avcodec libass"
3261 super2xsai_filter_deps="gpl"
3262 pixfmts_super2xsai_test_deps="super2xsai_filter"
3263 tinterlace_filter_deps="gpl"
3264 tinterlace_merge_test_deps="tinterlace_filter"
3265 tinterlace_pad_test_deps="tinterlace_filter"
3266 tonemap_filter_deps="const_nan"
3267 uspp_filter_deps="gpl avcodec"
3268 vaguedenoiser_filter_deps="gpl"
3269 vidstabdetect_filter_deps="libvidstab"
3270 vidstabtransform_filter_deps="libvidstab"
3271 libvmaf_filter_deps="libvmaf"
3272 zmq_filter_deps="libzmq"
3273 zoompan_filter_deps="swscale"
3274 zscale_filter_deps="libzimg const_nan"
3275 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
3276
3277 # examples
3278 avio_dir_cmd_deps="avformat avutil"
3279 avio_reading_deps="avformat avcodec avutil"
3280 decode_audio_example_deps="avcodec avutil"
3281 decode_video_example_deps="avcodec avutil"
3282 demuxing_decoding_example_deps="avcodec avformat avutil"
3283 encode_audio_example_deps="avcodec avutil"
3284 encode_video_example_deps="avcodec avutil"
3285 extract_mvs_example_deps="avcodec avformat avutil"
3286 filter_audio_example_deps="avfilter avutil"
3287 filtering_audio_example_deps="avfilter avcodec avformat avutil"
3288 filtering_video_example_deps="avfilter avcodec avformat avutil"
3289 http_multiclient_example_deps="avformat avutil fork"
3290 hw_decode_example_deps="avcodec avformat avutil"
3291 metadata_example_deps="avformat avutil"
3292 muxing_example_deps="avcodec avformat avutil swscale"
3293 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
3294 remuxing_example_deps="avcodec avformat avutil"
3295 resampling_audio_example_deps="avutil swresample"
3296 scaling_video_example_deps="avutil swscale"
3297 transcode_aac_example_deps="avcodec avformat swresample"
3298 transcoding_example_deps="avfilter avcodec avformat avutil"
3299
3300 # libraries, in linking order
3301 avcodec_deps="avutil"
3302 avcodec_select="null_bsf"
3303 avdevice_deps="avformat avcodec avutil"
3304 avfilter_deps="avutil"
3305 avformat_deps="avcodec avutil"
3306 avformat_suggest="network"
3307 avresample_deps="avutil"
3308 postproc_deps="avutil gpl"
3309 swresample_deps="avutil"
3310 swscale_deps="avutil"
3311
3312 # programs
3313 ffmpeg_deps="avcodec avfilter avformat swresample"
3314 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
3315                null_filter
3316                trim_filter"
3317 ffplay_deps="avcodec avformat swscale swresample sdl2"
3318 ffplay_extralibs='$sdl2_extralibs'
3319 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
3320 ffprobe_deps="avcodec avformat"
3321 ffserver_deps="avformat fork sarestart"
3322 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
3323
3324 # documentation
3325 podpages_deps="perl"
3326 manpages_deps="perl pod2man"
3327 htmlpages_deps="perl"
3328 htmlpages_deps_any="makeinfo_html texi2html"
3329 txtpages_deps="perl makeinfo"
3330 doc_deps_any="manpages htmlpages podpages txtpages"
3331
3332 # default parameters
3333
3334 logfile="ffbuild/config.log"
3335
3336 # installation paths
3337 prefix_default="/usr/local"
3338 bindir_default='${prefix}/bin'
3339 datadir_default='${prefix}/share/ffmpeg'
3340 docdir_default='${prefix}/share/doc/ffmpeg'
3341 incdir_default='${prefix}/include'
3342 libdir_default='${prefix}/lib'
3343 mandir_default='${prefix}/share/man'
3344
3345 # toolchain
3346 ar_default="ar"
3347 cc_default="gcc"
3348 cxx_default="g++"
3349 host_cc_default="gcc"
3350 doxygen_default="doxygen"
3351 install="install"
3352 ln_s_default="ln -s -f"
3353 nm_default="nm -g"
3354 pkg_config_default=pkg-config
3355 ranlib_default="ranlib"
3356 strip_default="strip"
3357 version_script='--version-script'
3358 x86asmexe_default="nasm"
3359 windres_default="windres"
3360 nvcc_default="nvcc"
3361 nvccflags_default="-gencode arch=compute_30,code=sm_30 -O2"
3362
3363 # OS
3364 target_os_default=$(tolower $(uname -s))
3365 host_os=$target_os_default
3366
3367 # machine
3368 if test "$target_os_default" = aix; then
3369     arch_default=$(uname -p)
3370     strip_default="strip -X32_64"
3371 else
3372     arch_default=$(uname -m)
3373 fi
3374 cpu="generic"
3375 intrinsics="none"
3376
3377 # configurable options
3378 enable $PROGRAM_LIST
3379 enable $DOCUMENT_LIST
3380 enable $EXAMPLE_LIST
3381 enable $(filter_out avresample $LIBRARY_LIST)
3382 enable stripping
3383
3384 enable asm
3385 enable debug
3386 enable doc
3387 enable faan faandct faanidct
3388 enable optimizations
3389 enable runtime_cpudetect
3390 enable safe_bitstream_reader
3391 enable static
3392 enable swscale_alpha
3393 enable valgrind_backtrace
3394
3395 sws_max_filter_size_default=256
3396 set_default sws_max_filter_size
3397
3398 # build settings
3399 SHFLAGS='-shared -Wl,-soname,$$(@F)'
3400 LIBPREF="lib"
3401 LIBSUF=".a"
3402 FULLNAME='$(NAME)$(BUILDSUF)'
3403 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
3404 SLIBPREF="lib"
3405 SLIBSUF=".so"
3406 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
3407 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
3408 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
3409 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
3410 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
3411 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
3412 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
3413
3414 asflags_filter=echo
3415 cflags_filter=echo
3416 ldflags_filter=echo
3417
3418 AS_C='-c'
3419 AS_O='-o $@'
3420 CC_C='-c'
3421 CC_E='-E -o $@'
3422 CC_O='-o $@'
3423 CXX_C='-c'
3424 CXX_O='-o $@'
3425 OBJCC_C='-c'
3426 OBJCC_E='-E -o $@'
3427 OBJCC_O='-o $@'
3428 X86ASM_O='-o $@'
3429 LD_O='-o $@'
3430 LD_LIB='-l%'
3431 LD_PATH='-L'
3432 HOSTCC_C='-c'
3433 HOSTCC_E='-E -o $@'
3434 HOSTCC_O='-o $@'
3435 HOSTLD_O='-o $@'
3436 NVCC_C='-c'
3437 NVCC_O='-o $@'
3438
3439 host_extralibs='-lm'
3440 host_cflags_filter=echo
3441 host_ldflags_filter=echo
3442
3443 target_path='$(CURDIR)'
3444
3445 # since the object filename is not given with the -MM flag, the compiler
3446 # is only able to print the basename, and we must add the path ourselves
3447 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(@F),$(@D)/$(@F)," > $(@:.o=.d)'
3448 DEPFLAGS='-MM'
3449
3450 mkdir -p ffbuild
3451
3452 # find source path
3453 if test -f configure; then
3454     source_path=.
3455 else
3456     source_path=$(cd $(dirname "$0"); pwd)
3457     case "$source_path" in
3458         *[[:blank:]]*) die "Out of tree builds are impossible with whitespace in source path." ;;
3459     esac
3460     test -e "$source_path/config.h" &&
3461         die "Out of tree builds are impossible with config.h in source dir."
3462 fi
3463
3464 for v in "$@"; do
3465     r=${v#*=}
3466     l=${v%"$r"}
3467     r=$(sh_quote "$r")
3468     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
3469 done
3470
3471 find_things(){
3472     thing=$1
3473     pattern=$2
3474     file=$source_path/$3
3475     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
3476 }
3477
3478 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
3479 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
3480 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
3481 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
3482 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
3483 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
3484 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
3485 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
3486 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
3487
3488 find_things_extern(){
3489     thing=$1
3490     pattern=$2
3491     file=$source_path/$3
3492     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
3493 }
3494
3495 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
3496 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
3497
3498 ALL_COMPONENTS="
3499     $BSF_LIST
3500     $DECODER_LIST
3501     $DEMUXER_LIST
3502     $ENCODER_LIST
3503     $FILTER_LIST
3504     $HWACCEL_LIST
3505     $INDEV_LIST
3506     $MUXER_LIST
3507     $OUTDEV_LIST
3508     $PARSER_LIST
3509     $PROTOCOL_LIST
3510 "
3511
3512 for n in $COMPONENT_LIST; do
3513     v=$(toupper ${n%s})_LIST
3514     eval enable \$$v
3515     eval ${n}_if_any="\$$v"
3516 done
3517
3518 enable $ARCH_EXT_LIST
3519
3520 die_unknown(){
3521     echo "Unknown option \"$1\"."
3522     echo "See $0 --help for available options."
3523     exit 1
3524 }
3525
3526 print_in_columns() {
3527     cols=$(expr $ncols / 24)
3528     cat | tr ' ' '\n' | sort | pr -r "-$cols" -w $ncols -t
3529 }
3530
3531 show_list() {
3532     suffix=_$1
3533     shift
3534     echo $* | sed s/$suffix//g | print_in_columns
3535     exit 0
3536 }
3537
3538 rand_list(){
3539     IFS=', '
3540     set -- $*
3541     unset IFS
3542     for thing; do
3543         comp=${thing%:*}
3544         prob=${thing#$comp}
3545         prob=${prob#:}
3546         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
3547         echo "prob ${prob:-0.5}"
3548         printf '%s\n' $comp
3549     done
3550 }
3551
3552 do_random(){
3553     action=$1
3554     shift
3555     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
3556     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
3557 }
3558
3559 for opt do
3560     optval="${opt#*=}"
3561     case "$opt" in
3562         --extra-ldflags=*)
3563             add_ldflags $optval
3564         ;;
3565         --extra-ldexeflags=*)
3566             add_ldexeflags $optval
3567         ;;
3568         --extra-ldlibflags=*)
3569             add_ldlibflags $optval
3570         ;;
3571         --extra-libs=*)
3572             add_extralibs $optval
3573         ;;
3574         --disable-devices)
3575             disable $INDEV_LIST $OUTDEV_LIST
3576         ;;
3577         --enable-debug=*)
3578             debuglevel="$optval"
3579         ;;
3580         --disable-programs)
3581             disable $PROGRAM_LIST
3582         ;;
3583         --disable-everything)
3584             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3585         ;;
3586         --disable-all)
3587             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3588             disable $LIBRARY_LIST $PROGRAM_LIST doc
3589             enable avutil
3590         ;;
3591         --enable-random|--disable-random)
3592             action=${opt%%-random}
3593             do_random ${action#--} $COMPONENT_LIST
3594         ;;
3595         --enable-random=*|--disable-random=*)
3596             action=${opt%%-random=*}
3597             do_random ${action#--} $optval
3598         ;;
3599         --enable-sdl)
3600             enable sdl2
3601         ;;
3602         --enable-*=*|--disable-*=*)
3603             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
3604             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
3605             eval list=\$$(toupper $thing)_LIST
3606             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
3607             list=$(filter "$name" $list)
3608             [ "$list" = "" ] && warn "Option $opt did not match anything"
3609             $action $list
3610         ;;
3611         --enable-yasm|--disable-yasm)
3612             warn "The ${opt} option is only provided for compatibility and will be\n"\
3613                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
3614             test $opt = --enable-yasm && x86asm=yes || x86asm=no
3615         ;;
3616         --yasmexe=*)
3617             warn "The --yasmexe option is only provided for compatibility and will be\n"\
3618                  "removed in the future. Use --x86asmexe instead."
3619             x86asmexe="$optval"
3620         ;;
3621         --enable-?*|--disable-?*)
3622             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
3623             if is_in $option $COMPONENT_LIST; then
3624                 test $action = disable && action=unset
3625                 eval $action \$$(toupper ${option%s})_LIST
3626             elif is_in $option $CMDLINE_SELECT; then
3627                 $action $option
3628             else
3629                 die_unknown $opt
3630             fi
3631         ;;
3632         --list-*)
3633             NAME="${opt#--list-}"
3634             is_in $NAME $COMPONENT_LIST || die_unknown $opt
3635             NAME=${NAME%s}
3636             eval show_list $NAME \$$(toupper $NAME)_LIST
3637         ;;
3638         --help|-h) show_help
3639         ;;
3640         --quiet|-q) quiet=yes
3641         ;;
3642         --fatal-warnings) enable fatal_warnings
3643         ;;
3644         --libfuzzer=*)
3645             libfuzzer_path="$optval"
3646         ;;
3647         *)
3648             optname="${opt%%=*}"
3649             optname="${optname#--}"
3650             optname=$(echo "$optname" | sed 's/-/_/g')
3651             if is_in $optname $CMDLINE_SET; then
3652                 eval $optname='$optval'
3653             elif is_in $optname $CMDLINE_APPEND; then
3654                 append $optname "$optval"
3655             else
3656                 die_unknown $opt
3657             fi
3658         ;;
3659     esac
3660 done
3661
3662 for e in $env; do
3663     eval "export $e"
3664 done
3665
3666 if disabled autodetect; then
3667
3668     # Unless iconv is explicitely disabled by the user, we still want to probe
3669     # for the iconv from the libc.
3670     disabled iconv || enable libc_iconv
3671
3672     disable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
3673     disable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
3674 fi
3675 # Mark specifically enabled, but normally autodetected libraries as requested.
3676 for lib in $AUTODETECT_LIBS; do
3677     enabled $lib && request $lib
3678 done
3679 #TODO: switch to $AUTODETECT_LIBS when $THREADS_LIST is supported the same way
3680 enable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
3681 enable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
3682
3683 disabled logging && logfile=/dev/null
3684
3685 die_license_disabled() {
3686     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
3687 }
3688
3689 die_license_disabled_gpl() {
3690     enabled $1 || { enabled $v && die "$v is incompatible with the gpl and --enable-$1 is not specified."; }
3691 }
3692
3693 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
3694 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
3695
3696 enabled gpl && map "die_license_disabled_gpl nonfree" $EXTERNAL_LIBRARY_NONFREE_LIST
3697 map "die_license_disabled nonfree" $HWACCEL_LIBRARY_NONFREE_LIST
3698
3699 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3700
3701 # Disable all the library-specific components if the library itself
3702 # is disabled, see AVCODEC_LIST and following _LIST variables.
3703
3704 disable_components(){
3705     disabled ${1} && disable $(
3706         eval components="\$$(toupper ${1})_COMPONENTS"
3707         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
3708     )
3709 }
3710
3711 map 'disable_components $v' $LIBRARY_LIST
3712
3713 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
3714 set >> $logfile
3715
3716 test -n "$valgrind" && toolchain="valgrind-memcheck"
3717
3718 enabled ossfuzz && {
3719     add_cflags  -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp -fno-omit-frame-pointer
3720     add_ldflags -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp
3721 }
3722
3723 case "$toolchain" in
3724     *-asan)
3725         cc_default="${toolchain%-asan}"
3726         add_cflags  -fsanitize=address
3727         add_ldflags -fsanitize=address
3728     ;;
3729     *-msan)
3730         cc_default="${toolchain%-msan}"
3731         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
3732         add_ldflags -fsanitize=memory
3733     ;;
3734     *-tsan)
3735         cc_default="${toolchain%-tsan}"
3736         add_cflags  -fsanitize=thread -fPIE
3737         add_ldflags -fsanitize=thread -pie
3738         case "$toolchain" in
3739             gcc-tsan)
3740                 add_cflags  -fPIC
3741                 add_ldflags -fPIC
3742                 ;;
3743         esac
3744     ;;
3745     *-usan)
3746         cc_default="${toolchain%-usan}"
3747         add_cflags  -fsanitize=undefined
3748         add_ldflags -fsanitize=undefined
3749     ;;
3750     valgrind-*)
3751         target_exec_default="valgrind"
3752         case "$toolchain" in
3753             valgrind-massif)
3754                 target_exec_args="--tool=massif --alloc-fn=av_malloc --alloc-fn=av_mallocz --alloc-fn=av_calloc --alloc-fn=av_fast_padded_malloc --alloc-fn=av_fast_malloc --alloc-fn=av_realloc_f --alloc-fn=av_fast_realloc --alloc-fn=av_realloc"
3755                 ;;
3756             valgrind-memcheck)
3757                 target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3758                 ;;
3759         esac
3760     ;;
3761     msvc)
3762         # Check whether the current MSVC version needs the C99 converter.
3763         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3764         # support enough of C99 to build ffmpeg. Default to the new
3765         # behaviour if the regexp was unable to match anything, since this
3766         # successfully parses the version number of existing supported
3767         # versions that require the converter (MSVC 2010 and 2012).
3768         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3769         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3770             cc_default="cl"
3771             cxx_default="cl"
3772         else
3773             cc_default="c99wrap cl"
3774             cxx_default="c99wrap cl"
3775         fi
3776         ld_default="$source_path/compat/windows/mslink"
3777         nm_default="dumpbin -symbols"
3778         ar_default="lib"
3779         case "$arch" in
3780         arm*)
3781             as_default="armasm"
3782             ;;
3783         esac
3784         target_os_default="win32"
3785         # Use a relative path for TMPDIR. This makes sure all the
3786         # ffconf temp files are written with a relative path, avoiding
3787         # issues with msys/win32 path conversion for MSVC parameters
3788         # such as -Fo<file> or -out:<file>.
3789         TMPDIR=.
3790     ;;
3791     icl)
3792         cc_default="icl"
3793         ld_default="xilink"
3794         nm_default="dumpbin -symbols"
3795         ar_default="xilib"
3796         target_os_default="win32"
3797         TMPDIR=.
3798     ;;
3799     gcov)
3800         add_cflags  -fprofile-arcs -ftest-coverage
3801         add_ldflags -fprofile-arcs -ftest-coverage
3802     ;;
3803     llvm-cov)
3804         add_cflags -fprofile-arcs -ftest-coverage
3805         add_ldflags --coverage
3806     ;;
3807     hardened)
3808         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3809         add_cflags   -fno-strict-overflow -fstack-protector-all
3810         add_ldflags  -Wl,-z,relro -Wl,-z,now
3811         add_cflags   -fPIE
3812         add_ldexeflags -fPIE -pie
3813     ;;
3814     ?*)
3815         die "Unknown toolchain $toolchain"
3816     ;;
3817 esac
3818
3819 test -n "$cross_prefix" && enable cross_compile
3820
3821 if enabled cross_compile; then
3822     test -n "$arch" && test -n "$target_os" ||
3823         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3824 fi
3825
3826 ar_default="${cross_prefix}${ar_default}"
3827 cc_default="${cross_prefix}${cc_default}"
3828 cxx_default="${cross_prefix}${cxx_default}"
3829 nm_default="${cross_prefix}${nm_default}"
3830 pkg_config_default="${cross_prefix}${pkg_config_default}"
3831 if ${cross_prefix}${ranlib_default} 2>&1 | grep -q "\-D "; then
3832     ranlib_default="${cross_prefix}${ranlib_default} -D"
3833 else
3834     ranlib_default="${cross_prefix}${ranlib_default}"
3835 fi
3836 strip_default="${cross_prefix}${strip_default}"
3837 windres_default="${cross_prefix}${windres_default}"
3838
3839 sysinclude_default="${sysroot}/usr/include"
3840
3841 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3842     target_exec target_os x86asmexe nvcc
3843 enabled cross_compile || host_cc_default=$cc
3844 set_default host_cc
3845
3846 pkg_config_fail_message=""
3847 if ! $pkg_config --version >/dev/null 2>&1; then
3848     warn "$pkg_config not found, library detection may fail."
3849     pkg_config=false
3850 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3851     pkg_config_fail_message="
3852 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3853 fi
3854
3855 if test $doxygen != $doxygen_default && \
3856   ! $doxygen --version >/dev/null 2>&1; then
3857     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3858 fi
3859
3860 exesuf() {
3861     case $1 in
3862         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3863     esac
3864 }
3865
3866 EXESUF=$(exesuf $target_os)
3867 HOSTEXESUF=$(exesuf $host_os)
3868
3869 # set temporary file name
3870 : ${TMPDIR:=$TEMPDIR}
3871 : ${TMPDIR:=$TMP}
3872 : ${TMPDIR:=/tmp}
3873
3874 if [ -n "$tempprefix" ] ; then
3875     mktemp(){
3876         tmpname="$tempprefix.${HOSTNAME}.${UID}"
3877         echo "$tmpname"
3878         mkdir "$tmpname"
3879     }
3880 elif ! check_cmd mktemp -u XXXXXX; then
3881     # simple replacement for missing mktemp
3882     # NOT SAFE FOR GENERAL USE
3883     mktemp(){
3884         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3885         echo "$tmpname"
3886         mkdir "$tmpname"
3887     }
3888 fi
3889
3890 FFTMPDIR=$(mktemp -d "${TMPDIR}/ffconf.XXXXXXXX" 2> /dev/null) ||
3891     die "Unable to create temporary directory in $TMPDIR."
3892
3893 tmpfile(){
3894     tmp="${FFTMPDIR}/test"$2
3895     (set -C; exec > $tmp) 2> /dev/null ||
3896         die "Unable to create temporary file in $FFTMPDIR."
3897     eval $1=$tmp
3898 }
3899
3900 trap 'rm -rf -- "$FFTMPDIR"' EXIT
3901 trap 'exit 2' INT
3902
3903 tmpfile TMPASM .asm
3904 tmpfile TMPC   .c
3905 tmpfile TMPCPP .cpp
3906 tmpfile TMPE   $EXESUF
3907 tmpfile TMPH   .h
3908 tmpfile TMPM   .m
3909 tmpfile TMPO   .o
3910 tmpfile TMPS   .S
3911 tmpfile TMPSH  .sh
3912 tmpfile TMPV   .ver
3913
3914 unset -f mktemp
3915
3916 chmod +x $TMPE
3917
3918 # make sure we can execute files in $TMPDIR
3919 cat > $TMPSH 2>> $logfile <<EOF
3920 #! /bin/sh
3921 EOF
3922 chmod +x $TMPSH >> $logfile 2>&1
3923 if ! $TMPSH >> $logfile 2>&1; then
3924     cat <<EOF
3925 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3926 variable to another directory and make sure that it is not mounted noexec.
3927 EOF
3928     die "Sanity test failed."
3929 fi
3930
3931 armasm_flags(){
3932     for flag; do
3933         case $flag in
3934             # Filter out MSVC cl.exe options from cflags that shouldn't
3935             # be passed to gas-preprocessor
3936             -M[TD]*)                                            ;;
3937             *)                  echo $flag                      ;;
3938         esac
3939    done
3940 }
3941
3942 ccc_flags(){
3943     for flag; do
3944         case $flag in
3945             -std=c99)           echo -c99                       ;;
3946             -mcpu=*)            echo -arch ${flag#*=}           ;;
3947             -mieee)             echo -ieee                      ;;
3948             -O*|-fast)          echo $flag                      ;;
3949             -fno-math-errno)    echo -assume nomath_errno       ;;
3950             -g)                 echo -g3                        ;;
3951             -Wall)              echo -msg_enable level2         ;;
3952             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3953             -Wl,*)              echo $flag                      ;;
3954             -f*|-W*)                                            ;;
3955             *)                  echo $flag                      ;;
3956         esac
3957    done
3958 }
3959
3960 cparser_flags(){
3961     for flag; do
3962         case $flag in
3963             -Wno-switch)             echo -Wno-switch-enum ;;
3964             -Wno-format-zero-length) ;;
3965             -Wdisabled-optimization) ;;
3966             -Wno-pointer-sign)       echo -Wno-other ;;
3967             *)                       echo $flag ;;
3968         esac
3969     done
3970 }
3971
3972 msvc_common_flags(){
3973     for flag; do
3974         case $flag in
3975             # In addition to specifying certain flags under the compiler
3976             # specific filters, they must be specified here as well or else the
3977             # generic catch all at the bottom will print the original flag.
3978             -Wall)                ;;
3979             -Wextra)              ;;
3980             -std=c99)             ;;
3981             # Common flags
3982             -fomit-frame-pointer) ;;
3983             -g)                   echo -Z7 ;;
3984             -fno-math-errno)      ;;
3985             -fno-common)          ;;
3986             -fno-signed-zeros)    ;;
3987             -fPIC)                ;;
3988             -mthumb)              ;;
3989             -march=*)             ;;
3990             -lz)                  echo zlib.lib ;;
3991             -lx264)               echo libx264.lib ;;
3992             -lstdc++)             ;;
3993             -l*)                  echo ${flag#-l}.lib ;;
3994             -LARGEADDRESSAWARE)   echo $flag ;;
3995             -L*)                  echo -libpath:${flag#-L} ;;
3996             *)                    echo $flag ;;
3997         esac
3998     done
3999 }
4000
4001 msvc_flags(){
4002     msvc_common_flags "$@"
4003     for flag; do
4004         case $flag in
4005             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
4006                                        -wd4554 ;;
4007             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
4008                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
4009                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
4010                                        -wd4307 \
4011                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
4012         esac
4013     done
4014 }
4015
4016 icl_flags(){
4017     msvc_common_flags "$@"
4018     for flag; do
4019         case $flag in
4020             # Despite what Intel's documentation says -Wall, which is supported
4021             # on Windows, does enable remarks so disable them here.
4022             -Wall)                echo $flag -Qdiag-disable:remark ;;
4023             -std=c99)             echo -Qstd=c99 ;;
4024             -flto)                echo -ipo ;;
4025         esac
4026     done
4027 }
4028
4029 icc_flags(){
4030     for flag; do
4031         case $flag in
4032             -flto)                echo -ipo ;;
4033             *)                    echo $flag ;;
4034         esac
4035     done
4036 }
4037
4038 pgi_flags(){
4039     for flag; do
4040         case $flag in
4041             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
4042             -fomit-frame-pointer) echo -Mnoframe ;;
4043             -g)                   echo -gopt ;;
4044             *)                    echo $flag ;;
4045         esac
4046     done
4047 }
4048
4049 suncc_flags(){
4050     for flag; do
4051         case $flag in
4052             -march=*|-mcpu=*)
4053                 case "${flag#*=}" in
4054                     native)                   echo -xtarget=native       ;;
4055                     v9|niagara)               echo -xarch=sparc          ;;
4056                     ultrasparc)               echo -xarch=sparcvis       ;;
4057                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
4058                     i586|pentium)             echo -xchip=pentium        ;;
4059                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
4060                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
4061                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
4062                     pentium4*)          echo -xtarget=pentium4           ;;
4063                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
4064                     *-sse3)             echo -xarch=sse3                 ;;
4065                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
4066                     bonnell)                   echo -xarch=ssse3         ;;
4067                     corei7|nehalem)            echo -xtarget=nehalem     ;;
4068                     westmere)                  echo -xtarget=westmere    ;;
4069                     silvermont)                echo -xarch=sse4_2        ;;
4070                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
4071                     core-avx*|ivybridge|haswell|broadwell|skylake*|knl)
4072                                                echo -xarch=avx           ;;
4073                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
4074                     btver1)                    echo -xarch=amdsse4a      ;;
4075                     btver2|bdver*|znver*)      echo -xarch=avx           ;;
4076                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
4077                     k8|opteron|athlon64|athlon-fx)
4078                                                echo -xarch=sse2a         ;;
4079                     athlon*)                   echo -xarch=pentium_proa  ;;
4080                 esac
4081                 ;;
4082             -std=c99)             echo -xc99              ;;
4083             -fomit-frame-pointer) echo -xregs=frameptr    ;;
4084             -fPIC)                echo -KPIC -xcode=pic32 ;;
4085             -W*,*)                echo $flag              ;;
4086             -f*-*|-W*|-mimpure-text)                      ;;
4087             -shared)              echo -G                 ;;
4088             *)                    echo $flag              ;;
4089         esac
4090     done
4091 }
4092
4093 tms470_flags(){
4094     for flag; do
4095         case $flag in
4096             -march=*|-mcpu=*)
4097                 case "${flag#*=}" in
4098                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
4099                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
4100                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
4101                     armv6*|arm11*)          echo -mv=6   ;;
4102                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
4103                                             echo -mv=5e  ;;
4104                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
4105                 esac
4106                 ;;
4107             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
4108             -mfpu=vfp)      echo --float_support=vfpv2        ;;
4109             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
4110             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
4111             -msoft-float)   echo --float_support=vfplib       ;;
4112             -O[0-3]|-mf=*)  echo $flag                        ;;
4113             -g)             echo -g -mn                       ;;
4114             -pds=*)         echo $flag                        ;;
4115             -D*|-I*)        echo $flag                        ;;
4116             --gcc|--abi=*)  echo $flag                        ;;
4117             -me)            echo $flag                        ;;
4118         esac
4119     done
4120 }
4121
4122 probe_cc(){
4123     pfx=$1
4124     _cc=$2
4125     first=$3
4126
4127     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
4128     unset _ld_o _ldflags _ld_lib _ld_path
4129     unset _depflags _DEPCMD _DEPFLAGS
4130     _flags_filter=echo
4131
4132     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
4133         true # no-op to avoid reading stdin in following checks
4134     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
4135         _type=llvm_gcc
4136         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
4137         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
4138         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4139         _cflags_speed='-O3'
4140         _cflags_size='-Os'
4141     elif $_cc -v 2>&1 | grep -qi ^gcc; then
4142         _type=gcc
4143         gcc_version=$($_cc --version | head -n1)
4144         gcc_basever=$($_cc -dumpversion)
4145         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
4146         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
4147         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
4148         case $gcc_basever in
4149             2) ;;
4150             2.*) ;;
4151             *) _depflags='-MMD -MF $(@:.o=.d) -MT $@' ;;
4152         esac
4153         if [ "$first" = true ]; then
4154             case $gcc_basever in
4155                 4.2*)
4156                 warn "gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler." ;;
4157             esac
4158         fi
4159         _cflags_speed='-O3'
4160         _cflags_size='-Os'
4161     elif $_cc --version 2>/dev/null | grep -q ^icc; then
4162         _type=icc
4163         _ident=$($_cc --version | head -n1)
4164         _depflags='-MMD'
4165         _cflags_speed='-O3'
4166         _cflags_size='-Os'
4167         _cflags_noopt='-O1'
4168         _flags_filter=icc_flags
4169     elif $_cc -v 2>&1 | grep -q xlc; then
4170         _type=xlc
4171         _ident=$($_cc -qversion 2>/dev/null | head -n1)
4172         _cflags_speed='-O5'
4173         _cflags_size='-O5 -qcompact'
4174     elif $_cc -V 2>/dev/null | grep -q Compaq; then
4175         _type=ccc
4176         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
4177         _DEPFLAGS='-M'
4178         _cflags_speed='-fast'
4179         _cflags_size='-O1'
4180         _flags_filter=ccc_flags
4181     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
4182         test -d "$sysroot" || die "No valid sysroot specified."
4183         _type=armcc
4184         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
4185         armcc_conf="$PWD/armcc.conf"
4186         $_cc --arm_linux_configure                 \
4187              --arm_linux_config_file="$armcc_conf" \
4188              --configure_sysroot="$sysroot"        \
4189              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
4190              die "Error creating armcc configuration file."
4191         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
4192         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
4193         as_default="${cross_prefix}gcc"
4194         _depflags='-MMD'
4195         _cflags_speed='-O3'
4196         _cflags_size='-Os'
4197     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
4198         _type=tms470
4199         _ident=$($_cc -version | head -n1 | tr -s ' ')
4200         _flags='--gcc --abi=eabi -me'
4201         _cc_e='-ppl -fe=$@'
4202         _cc_o='-fe=$@'
4203         _depflags='-ppa -ppd=$(@:.o=.d)'
4204         _cflags_speed='-O3 -mf=5'
4205         _cflags_size='-O3 -mf=2'
4206         _flags_filter=tms470_flags
4207     elif $_cc -v 2>&1 | grep -q clang; then
4208         _type=clang
4209         _ident=$($_cc --version 2>/dev/null | head -n1)
4210         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4211         _cflags_speed='-O3'
4212         _cflags_size='-Oz'
4213     elif $_cc -V 2>&1 | grep -q Sun; then
4214         _type=suncc
4215         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
4216         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
4217         _DEPFLAGS='-xM1 -xc99'
4218         _ldflags='-std=c99'
4219         _cflags_speed='-O5'
4220         _cflags_size='-O5 -xspace'
4221         _flags_filter=suncc_flags
4222     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
4223         _type=pathscale
4224         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
4225         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4226         _cflags_speed='-O2'
4227         _cflags_size='-Os'
4228         _flags_filter='filter_out -Wdisabled-optimization'
4229     elif $_cc -v 2>&1 | grep -q Open64; then
4230         _type=open64
4231         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
4232         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4233         _cflags_speed='-O2'
4234         _cflags_size='-Os'
4235         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
4236     elif $_cc -V 2>&1 | grep -q Portland; then
4237         _type=pgi
4238         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
4239         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
4240         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
4241         _cflags_size="-O2 -Munroll=c:1 $opt_common"
4242         _cflags_noopt="-O"
4243         _flags_filter=pgi_flags
4244     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
4245         _type=armasm
4246         _ident=$($_cc | head -n1)
4247         # 4509: "This form of conditional instruction is deprecated"
4248         _flags="-nologo -ignore 4509"
4249         _flags_filter=armasm_flags
4250     elif $_cc 2>&1 | grep -q Intel; then
4251         _type=icl
4252         _ident=$($_cc 2>&1 | head -n1)
4253         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
4254         # Not only is O3 broken on 13.x+ but it is slower on all previous
4255         # versions (tested) as well.
4256         _cflags_speed="-O2"
4257         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
4258         if $_cc 2>&1 | grep -q Linker; then
4259             _ld_o='-out:$@'
4260         else
4261             _ld_o='-Fe$@'
4262         fi
4263         _cc_o='-Fo$@'
4264         _cc_e='-P'
4265         _flags_filter=icl_flags
4266         _ld_lib='lib%.a'
4267         _ld_path='-libpath:'
4268         # -Qdiag-error to make icl error when seeing certain unknown arguments
4269         _flags='-nologo -Qdiag-error:4044,10157'
4270         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
4271         # with MSVC which enables it by default.
4272         _cflags='-Qms0 -Qvec- -Qsimd- -GS -fp:precise'
4273         disable stripping
4274     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
4275         # lld can emulate multiple different linkers; in ms link.exe mode,
4276         # the -? parameter gives the help output which contains an identifyable
4277         # string, while it gives an error in other modes.
4278         _type=lld-link
4279         # The link.exe mode doesn't have a switch for getting the version,
4280         # but we can force it back to gnu mode and get the version from there.
4281         _ident=$($_cc -flavor gnu --version 2>/dev/null)
4282         _ld_o='-out:$@'
4283         _flags_filter=msvc_flags
4284         _ld_lib='lib%.a'
4285         _ld_path='-libpath:'
4286     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
4287         _type=msvc
4288         _ident=$($_cc 2>&1 | head -n1)
4289         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
4290         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
4291         _cflags_speed="-O2"
4292         _cflags_size="-O1"
4293         _cflags_noopt="-O1"
4294         if $_cc -nologo- 2>&1 | grep -q Linker; then
4295             _ld_o='-out:$@'
4296         else
4297             _ld_o='-Fe$@'
4298         fi
4299         _cc_o='-Fo$@'
4300         _cc_e='-P -Fi$@'
4301         _flags_filter=msvc_flags
4302         _ld_lib='lib%.a'
4303         _ld_path='-libpath:'
4304         _flags='-nologo'
4305         disable stripping
4306     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
4307         _type=cparser
4308         _ident=$($_cc --version | head -n1)
4309         _depflags='-MMD'
4310         _cflags_speed='-O4'
4311         _cflags_size='-O2'
4312         _flags_filter=cparser_flags
4313     fi
4314
4315     eval ${pfx}_type=\$_type
4316     eval ${pfx}_ident=\$_ident
4317 }
4318
4319 set_ccvars(){
4320     eval ${1}_C=\${_cc_c-\${${1}_C}}
4321     eval ${1}_E=\${_cc_e-\${${1}_E}}
4322     eval ${1}_O=\${_cc_o-\${${1}_O}}
4323
4324     if [ -n "$_depflags" ]; then
4325         eval ${1}_DEPFLAGS=\$_depflags
4326     else
4327         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
4328         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
4329         eval DEP${1}FLAGS=\$_flags
4330     fi
4331 }
4332
4333 probe_cc cc "$cc" "true"
4334 cflags_filter=$_flags_filter
4335 cflags_speed=$_cflags_speed
4336 cflags_size=$_cflags_size
4337 cflags_noopt=$_cflags_noopt
4338 add_cflags $_flags $_cflags
4339 cc_ldflags=$_ldflags
4340 set_ccvars CC
4341 set_ccvars CXX
4342
4343 probe_cc hostcc "$host_cc"
4344 host_cflags_filter=$_flags_filter
4345 host_cflags_speed=$_cflags_speed
4346 add_host_cflags  $_flags $_cflags
4347 set_ccvars HOSTCC
4348
4349 test -n "$cc_type" && enable $cc_type ||
4350     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
4351
4352 : ${as_default:=$cc}
4353 : ${objcc_default:=$cc}
4354 : ${dep_cc_default:=$cc}
4355 : ${ld_default:=$cc}
4356 : ${host_ld_default:=$host_cc}
4357 set_default ar as objcc dep_cc ld ln_s host_ld windres
4358
4359 probe_cc as "$as"
4360 asflags_filter=$_flags_filter
4361 add_asflags $_flags $_cflags
4362 set_ccvars AS
4363
4364 probe_cc objcc "$objcc"
4365 objcflags_filter=$_flags_filter
4366 add_objcflags $_flags $_cflags
4367 set_ccvars OBJC
4368
4369 probe_cc ld "$ld"
4370 ldflags_filter=$_flags_filter
4371 add_ldflags $_flags $_ldflags
4372 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
4373 LD_O=${_ld_o-$LD_O}
4374 LD_LIB=${_ld_lib-$LD_LIB}
4375 LD_PATH=${_ld_path-$LD_PATH}
4376
4377 probe_cc hostld "$host_ld"
4378 host_ldflags_filter=$_flags_filter
4379 add_host_ldflags $_flags $_ldflags
4380 HOSTLD_O=${_ld_o-$HOSTLD_O}
4381
4382 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
4383     probe_cc depcc "$dep_cc"
4384     CCDEP=${_DEPCMD:-$DEPCMD}
4385     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
4386     DEPCCFLAGS=$_flags
4387 fi
4388
4389 if $ar 2>&1 | grep -q Microsoft; then
4390     arflags="-nologo"
4391     ar_o='-out:$@'
4392 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
4393     arflags="rq"
4394     ar_o='$@'
4395 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
4396     arflags='-Xany -r -c'
4397     ar_o='$@'
4398 elif $ar 2>&1 | grep -q "\[D\] "; then
4399     arflags="rcD"
4400     ar_o='$@'
4401 else
4402     arflags="rc"
4403     ar_o='$@'
4404 fi
4405
4406 add_cflags $extra_cflags
4407 add_cxxflags $extra_cxxflags
4408 add_objcflags $extra_objcflags
4409 add_asflags $extra_cflags
4410
4411 if test -n "$sysroot"; then
4412     case "$cc_type" in
4413         gcc|llvm_gcc|clang)
4414             add_cppflags --sysroot="$sysroot"
4415             add_ldflags --sysroot="$sysroot"
4416 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
4417             add_cppflags -isysroot "$sysroot"
4418             add_ldflags -isysroot "$sysroot"
4419         ;;
4420         tms470)
4421             add_cppflags -I"$sysinclude"
4422             add_ldflags  --sysroot="$sysroot"
4423         ;;
4424     esac
4425 fi
4426
4427 if test "$cpu" = host; then
4428     enabled cross_compile &&
4429         die "--cpu=host makes no sense when cross-compiling."
4430
4431     case "$cc_type" in
4432         gcc|llvm_gcc)
4433             check_native(){
4434                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4435                 sed -n "/cc1.*$1=/{
4436                             s/.*$1=\\([^ ]*\\).*/\\1/
4437                             p
4438                             q
4439                         }" $TMPE
4440             }
4441             cpu=$(check_native -march || check_native -mcpu)
4442         ;;
4443         clang)
4444             check_native(){
4445                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4446                 sed -n "/cc1.*-target-cpu /{
4447                             s/.*-target-cpu \\([^ ]*\\).*/\\1/
4448                             p
4449                             q
4450                         }" $TMPE
4451             }
4452             cpu=$(check_native -march)
4453         ;;
4454     esac
4455
4456     test "${cpu:-host}" = host &&
4457         die "--cpu=host not supported with compiler $cc"
4458 fi
4459
4460 # Deal with common $arch aliases
4461 case "$arch" in
4462     aarch64|arm64)
4463         arch="aarch64"
4464     ;;
4465     arm*|iPad*|iPhone*)
4466         arch="arm"
4467     ;;
4468     mips*|IP*)
4469         case "$arch" in
4470         *el)
4471             add_cppflags -EL
4472             add_ldflags -EL
4473         ;;
4474         *eb)
4475             add_cppflags -EB
4476             add_ldflags -EB
4477         ;;
4478         esac
4479         arch="mips"
4480     ;;
4481     parisc*|hppa*)
4482         arch="parisc"
4483     ;;
4484     "Power Macintosh"|ppc*|powerpc*)
4485         arch="ppc"
4486     ;;
4487     s390|s390x)
4488         arch="s390"
4489     ;;
4490     sh4|sh)
4491         arch="sh4"
4492     ;;
4493     sun4*|sparc*)
4494         arch="sparc"
4495     ;;
4496     tilegx|tile-gx)
4497         arch="tilegx"
4498     ;;
4499     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
4500         arch="x86"
4501     ;;
4502 esac
4503
4504 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
4505 enable $arch
4506
4507 # Add processor-specific flags
4508 if enabled aarch64; then
4509
4510     case $cpu in
4511         armv*)
4512             cpuflags="-march=$cpu"
4513         ;;
4514         *)
4515             cpuflags="-mcpu=$cpu"
4516         ;;
4517     esac
4518
4519 elif enabled alpha; then
4520
4521     cpuflags="-mcpu=$cpu"
4522
4523 elif enabled arm; then
4524
4525     check_arm_arch() {
4526         check_cpp_condition stddef.h \
4527             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
4528             $cpuflags
4529     }
4530
4531     probe_arm_arch() {
4532         if   check_arm_arch 4;        then echo armv4
4533         elif check_arm_arch 4T;       then echo armv4t
4534         elif check_arm_arch 5;        then echo armv5
4535         elif check_arm_arch 5E;       then echo armv5e
4536         elif check_arm_arch 5T;       then echo armv5t
4537         elif check_arm_arch 5TE;      then echo armv5te
4538         elif check_arm_arch 5TEJ;     then echo armv5te
4539         elif check_arm_arch 6;        then echo armv6
4540         elif check_arm_arch 6J;       then echo armv6j
4541         elif check_arm_arch 6K;       then echo armv6k
4542         elif check_arm_arch 6Z;       then echo armv6z
4543         elif check_arm_arch 6ZK;      then echo armv6zk
4544         elif check_arm_arch 6T2;      then echo armv6t2
4545         elif check_arm_arch 7;        then echo armv7
4546         elif check_arm_arch 7A  7_A;  then echo armv7-a
4547         elif check_arm_arch 7S;       then echo armv7-a
4548         elif check_arm_arch 7R  7_R;  then echo armv7-r
4549         elif check_arm_arch 7M  7_M;  then echo armv7-m
4550         elif check_arm_arch 7EM 7E_M; then echo armv7-m
4551         elif check_arm_arch 8A  8_A;  then echo armv8-a
4552         fi
4553     }
4554
4555     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
4556
4557     case $cpu in
4558         armv*)
4559             cpuflags="-march=$cpu"
4560             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
4561         ;;
4562         *)
4563             cpuflags="-mcpu=$cpu"
4564             case $cpu in
4565                 cortex-a*)                               subarch=armv7a  ;;
4566                 cortex-r*)                               subarch=armv7r  ;;
4567                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
4568                 arm11*)                                  subarch=armv6   ;;
4569                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
4570                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
4571                 *)                             subarch=$(probe_arm_arch) ;;
4572             esac
4573         ;;
4574     esac
4575
4576     case "$subarch" in
4577         armv5t*)    enable fast_clz                ;;
4578         armv[6-8]*)
4579             enable fast_clz
4580             disabled fast_unaligned || enable fast_unaligned
4581             ;;
4582     esac
4583
4584 elif enabled avr32; then
4585
4586     case $cpu in
4587         ap7[02]0[0-2])
4588             subarch="avr32_ap"
4589             cpuflags="-mpart=$cpu"
4590         ;;
4591         ap)
4592             subarch="avr32_ap"
4593             cpuflags="-march=$cpu"
4594         ;;
4595         uc3[ab]*)
4596             subarch="avr32_uc"
4597             cpuflags="-mcpu=$cpu"
4598         ;;
4599         uc)
4600             subarch="avr32_uc"
4601             cpuflags="-march=$cpu"
4602         ;;
4603     esac
4604
4605 elif enabled bfin; then
4606
4607     cpuflags="-mcpu=$cpu"
4608
4609 elif enabled mips; then
4610
4611     cpuflags="-march=$cpu"
4612
4613     if [ "$cpu" != "generic" ]; then
4614         disable mips32r2
4615         disable mips32r5
4616         disable mips64r2
4617         disable mips32r6
4618         disable mips64r6
4619         disable loongson2
4620         disable loongson3
4621
4622         case $cpu in
4623             24kc|24kf*|24kec|34kc|1004kc|24kef*|34kf*|1004kf*|74kc|74kf)
4624                 enable mips32r2
4625                 disable msa
4626             ;;
4627             p5600|i6400|p6600)
4628                 disable mipsdsp
4629                 disable mipsdspr2
4630             ;;
4631             loongson*)
4632                 enable loongson2
4633                 enable loongson3
4634                 enable local_aligned_8 local_aligned_16 local_aligned_32
4635                 enable simd_align_16
4636                 enable fast_64bit
4637                 enable fast_clz
4638                 enable fast_cmov
4639                 enable fast_unaligned
4640                 disable aligned_stack
4641                 disable mipsfpu
4642                 disable mipsdsp
4643                 disable mipsdspr2
4644                 case $cpu in
4645                     loongson3*)
4646                         cpuflags="-march=loongson3a -mhard-float -fno-expensive-optimizations"
4647                     ;;
4648                     loongson2e)
4649                         cpuflags="-march=loongson2e -mhard-float -fno-expensive-optimizations"
4650                     ;;
4651                     loongson2f)
4652                         cpuflags="-march=loongson2f -mhard-float -fno-expensive-optimizations"
4653                     ;;
4654                 esac
4655             ;;
4656             *)
4657                 # Unknown CPU. Disable everything.
4658                 warn "unknown CPU. Disabling all MIPS optimizations."
4659                 disable mipsfpu
4660                 disable mipsdsp
4661                 disable mipsdspr2
4662                 disable msa
4663                 disable mmi
4664             ;;
4665         esac
4666
4667         case $cpu in
4668             24kc)
4669                 disable mipsfpu
4670                 disable mipsdsp
4671                 disable mipsdspr2
4672             ;;
4673             24kf*)
4674                 disable mipsdsp
4675                 disable mipsdspr2
4676             ;;
4677             24kec|34kc|1004kc)
4678                 disable mipsfpu
4679                 disable mipsdspr2
4680             ;;
4681             24kef*|34kf*|1004kf*)
4682                 disable mipsdspr2
4683             ;;
4684             74kc)
4685                 disable mipsfpu
4686             ;;
4687             p5600)
4688                 enable mips32r5
4689                 check_cflags "-mtune=p5600" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops"
4690             ;;
4691             i6400)
4692                 enable mips64r6
4693                 check_cflags "-mtune=i6400 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4694             ;;
4695             p6600)
4696                 enable mips64r6
4697                 check_cflags "-mtune=p6600 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4698             ;;
4699         esac
4700     else
4701         # We do not disable anything. Is up to the user to disable the unwanted features.
4702         warn 'generic cpu selected'
4703     fi
4704
4705 elif enabled ppc; then
4706
4707     disable ldbrx
4708
4709     case $(tolower $cpu) in
4710         601|ppc601|powerpc601)
4711             cpuflags="-mcpu=601"
4712             disable altivec
4713         ;;
4714         603*|ppc603*|powerpc603*)
4715             cpuflags="-mcpu=603"
4716             disable altivec
4717         ;;
4718         604*|ppc604*|powerpc604*)
4719             cpuflags="-mcpu=604"
4720             disable altivec
4721         ;;
4722         g3|75*|ppc75*|powerpc75*)
4723             cpuflags="-mcpu=750"
4724             disable altivec
4725         ;;
4726         g4|745*|ppc745*|powerpc745*)
4727             cpuflags="-mcpu=7450"
4728             disable vsx
4729         ;;
4730         74*|ppc74*|powerpc74*)
4731             cpuflags="-mcpu=7400"
4732             disable vsx
4733         ;;
4734         g5|970|ppc970|powerpc970)
4735             cpuflags="-mcpu=970"
4736             disable vsx
4737         ;;
4738         power[3-6]*)
4739             cpuflags="-mcpu=$cpu"
4740             disable vsx
4741         ;;
4742         power[7-8]*)
4743             cpuflags="-mcpu=$cpu"
4744         ;;
4745         cell)
4746             cpuflags="-mcpu=cell"
4747             enable ldbrx
4748             disable vsx
4749         ;;
4750         e500mc)
4751             cpuflags="-mcpu=e500mc"
4752             disable altivec
4753         ;;
4754         e500v2)
4755             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
4756             disable altivec
4757             disable dcbzl
4758         ;;
4759         e500)
4760             cpuflags="-mcpu=8540 -mhard-float"
4761             disable altivec
4762             disable dcbzl
4763         ;;
4764     esac
4765
4766 elif enabled sparc; then
4767
4768     case $cpu in
4769         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
4770             cpuflags="-mcpu=$cpu"
4771         ;;
4772         ultrasparc*|niagara[234])
4773             cpuflags="-mcpu=$cpu"
4774         ;;
4775     esac
4776
4777 elif enabled x86; then
4778
4779     case $cpu in
4780         i[345]86|pentium)
4781             cpuflags="-march=$cpu"
4782             disable i686
4783             disable mmx
4784         ;;
4785         # targets that do NOT support nopl and conditional mov (cmov)
4786         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
4787             cpuflags="-march=$cpu"
4788             disable i686
4789         ;;
4790         # targets that do support nopl and conditional mov (cmov)
4791         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
4792         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|skylake*|knl\
4793         |amdfam10|barcelona|b[dt]ver*|znver*)
4794             cpuflags="-march=$cpu"
4795             enable i686
4796             enable fast_cmov
4797         ;;
4798         # targets that do support conditional mov but on which it's slow
4799         pentium4|pentium4m|prescott|nocona)
4800             cpuflags="-march=$cpu"
4801             enable i686
4802             disable fast_cmov
4803         ;;
4804     esac
4805
4806 fi
4807
4808 if [ "$cpu" != generic ]; then
4809     add_cflags  $cpuflags
4810     add_asflags $cpuflags
4811     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
4812 fi
4813
4814 # compiler sanity check
4815 check_exec <<EOF
4816 int main(void){ return 0; }
4817 EOF
4818 if test "$?" != 0; then
4819     echo "$cc is unable to create an executable file."
4820     if test -z "$cross_prefix" && ! enabled cross_compile ; then
4821         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
4822         echo "Only do this if you know what cross compiling means."
4823     fi
4824     die "C compiler test failed."
4825 fi
4826
4827 add_cppflags -D_ISOC99_SOURCE
4828 add_cxxflags -D__STDC_CONSTANT_MACROS
4829 check_cxxflags -std=c++11 || check_cxxflags -std=c++0x
4830
4831 # some compilers silently accept -std=c11, so we also need to check that the
4832 # version macro is defined properly
4833 check_cpp_condition ctype.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
4834     add_cflags -std=c11 ||
4835     check_cflags -std=c99
4836
4837 check_cppflags -D_FILE_OFFSET_BITS=64
4838 check_cppflags -D_LARGEFILE_SOURCE
4839
4840 add_host_cppflags -D_ISOC99_SOURCE
4841 check_host_cflags -std=c99
4842 check_host_cflags -Wall
4843 check_host_cflags $host_cflags_speed
4844
4845 check_64bit(){
4846     arch32=$1
4847     arch64=$2
4848     expr=$3
4849     check_code cc "" "int test[2*($expr) - 1]" &&
4850         subarch=$arch64 || subarch=$arch32
4851 }
4852
4853 case "$arch" in
4854     aarch64|alpha|ia64)
4855         spic=$shared
4856     ;;
4857     mips)
4858         check_64bit mips mips64 '_MIPS_SIM > 1'
4859         spic=$shared
4860     ;;
4861     parisc)
4862         check_64bit parisc parisc64 'sizeof(void *) > 4'
4863         spic=$shared
4864     ;;
4865     ppc)
4866         check_64bit ppc ppc64 'sizeof(void *) > 4'
4867         spic=$shared
4868     ;;
4869     s390)
4870         check_64bit s390 s390x 'sizeo