Merge commit '54e39b102e29adcc2f59f1eca85be5f86c89454b'
[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     pkg_version="$1"
1272     pkg="${1%% *}"
1273     headers="$2"
1274     funcs="$3"
1275     shift 3
1276     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1277     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1278     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1279     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1280         set_safe "${pkg}_cflags"    $pkg_cflags &&
1281         set_safe "${pkg}_extralibs" $pkg_libs
1282 }
1283
1284 check_exec(){
1285     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1286 }
1287
1288 check_exec_crash(){
1289     log check_exec_crash "$@"
1290     code=$(cat)
1291
1292     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1293     # are safe but may not be available everywhere.  Thus we use
1294     # raise(SIGTERM) instead.  The check is run in a subshell so we
1295     # can redirect the "Terminated" message from the shell.  SIGBUS
1296     # is not defined by standard C so it is used conditionally.
1297
1298     (check_exec "$@") >> $logfile 2>&1 <<EOF
1299 #include <signal.h>
1300 static void sighandler(int sig){
1301     raise(SIGTERM);
1302 }
1303 int foo(void){
1304     $code
1305 }
1306 int (*func_ptr)(void) = foo;
1307 int main(void){
1308     signal(SIGILL, sighandler);
1309     signal(SIGFPE, sighandler);
1310     signal(SIGSEGV, sighandler);
1311 #ifdef SIGBUS
1312     signal(SIGBUS, sighandler);
1313 #endif
1314     return func_ptr();
1315 }
1316 EOF
1317 }
1318
1319 check_type(){
1320     log check_type "$@"
1321     headers=$1
1322     type=$2
1323     shift 2
1324     disable_safe "$type"
1325     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1326 }
1327
1328 check_struct(){
1329     log check_struct "$@"
1330     headers=$1
1331     struct=$2
1332     member=$3
1333     shift 3
1334     disable_safe "${struct}_${member}"
1335     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1336         enable_safe "${struct}_${member}"
1337 }
1338
1339 check_builtin(){
1340     log check_builtin "$@"
1341     name=$1
1342     headers=$2
1343     builtin=$3
1344     shift 3
1345     disable "$name"
1346     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1347 }
1348
1349 check_compile_assert(){
1350     log check_compile_assert "$@"
1351     name=$1
1352     headers=$2
1353     condition=$3
1354     shift 3
1355     disable "$name"
1356     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1357 }
1358
1359 require(){
1360     log require "$@"
1361     name_version="$1"
1362     name="${1%% *}"
1363     headers="$2"
1364     func="$3"
1365     shift 3
1366     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1367 }
1368
1369 require_cpp(){
1370     name="$1"
1371     headers="$2"
1372     classes="$3"
1373     shift 3
1374     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1375 }
1376
1377 require_header(){
1378     log require "$@"
1379     header="$1"
1380     shift
1381     check_header "$header" "$@" || die "ERROR: $header header not found"
1382 }
1383
1384 require_cpp_condition(){
1385     log require "$@"
1386     header="$1"
1387     condition="$2"
1388     shift 2
1389     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1390 }
1391
1392 use_pkg_config(){
1393     log use_pkg_config "$@"
1394     name="$1"
1395     shift
1396     pkg_version="$1"
1397     pkg="${1%% *}"
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     use_pkg_config "$@" || die "ERROR: $pkg_version not found using pkg-config$pkg_config_fail_message"
1405 }
1406
1407 hostcc_e(){
1408     eval printf '%s\\n' $HOSTCC_E
1409 }
1410
1411 hostcc_o(){
1412     eval printf '%s\\n' $HOSTCC_O
1413 }
1414
1415 check_host_cc(){
1416     log check_host_cc "$@"
1417     cat > $TMPC
1418     log_file $TMPC
1419     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1420 }
1421
1422 check_host_cpp(){
1423     log check_host_cpp "$@"
1424     cat > $TMPC
1425     log_file $TMPC
1426     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1427 }
1428
1429 check_host_cppflags(){
1430     log check_host_cppflags "$@"
1431     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1432 #include <stdlib.h>
1433 EOF
1434 }
1435
1436 check_host_cflags(){
1437     log check_host_cflags "$@"
1438     set -- $($host_cflags_filter "$@")
1439     check_host_cc "$@" <<EOF && append host_cflags "$@"
1440 int x;
1441 EOF
1442 }
1443
1444 check_host_cpp_condition(){
1445     log check_host_cpp_condition "$@"
1446     header=$1
1447     condition=$2
1448     shift 2
1449     check_host_cpp "$@" <<EOF
1450 #include <$header>
1451 #if !($condition)
1452 #error "unsatisfied condition: $condition"
1453 #endif
1454 EOF
1455 }
1456
1457 cp_if_changed(){
1458     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1459     mkdir -p "$(dirname $2)"
1460     cp -f "$1" "$2"
1461 }
1462
1463 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1464 # system-dependent things.
1465
1466 AVCODEC_COMPONENTS="
1467     bsfs
1468     decoders
1469     encoders
1470     hwaccels
1471     parsers
1472 "
1473
1474 AVDEVICE_COMPONENTS="
1475     indevs
1476     outdevs
1477 "
1478
1479 AVFILTER_COMPONENTS="
1480     filters
1481 "
1482
1483 AVFORMAT_COMPONENTS="
1484     demuxers
1485     muxers
1486     protocols
1487 "
1488
1489 AVRESAMPLE_COMPONENTS=""
1490
1491 AVUTIL_COMPONENTS=""
1492
1493 COMPONENT_LIST="
1494     $AVCODEC_COMPONENTS
1495     $AVDEVICE_COMPONENTS
1496     $AVFILTER_COMPONENTS
1497     $AVFORMAT_COMPONENTS
1498     $AVRESAMPLE_COMPONENTS
1499     $AVUTIL_COMPONENTS
1500 "
1501
1502 EXAMPLE_LIST="
1503     avio_dir_cmd_example
1504     avio_reading_example
1505     decode_audio_example
1506     decode_video_example
1507     demuxing_decoding_example
1508     encode_audio_example
1509     encode_video_example
1510     extract_mvs_example
1511     filter_audio_example
1512     filtering_audio_example
1513     filtering_video_example
1514     http_multiclient_example
1515     hw_decode_example
1516     metadata_example
1517     muxing_example
1518     qsvdec_example
1519     remuxing_example
1520     resampling_audio_example
1521     scaling_video_example
1522     transcode_aac_example
1523     transcoding_example
1524 "
1525
1526 EXTERNAL_AUTODETECT_LIBRARY_LIST="
1527     alsa
1528     appkit
1529     avfoundation
1530     bzlib
1531     coreimage
1532     iconv
1533     jack
1534     libxcb
1535     libxcb_shm
1536     libxcb_shape
1537     libxcb_xfixes
1538     lzma
1539     schannel
1540     sdl2
1541     securetransport
1542     sndio
1543     xlib
1544     zlib
1545 "
1546
1547 EXTERNAL_LIBRARY_GPL_LIST="
1548     avisynth
1549     frei0r
1550     libcdio
1551     librubberband
1552     libvidstab
1553     libx264
1554     libx265
1555     libxavs
1556     libxvid
1557 "
1558
1559 EXTERNAL_LIBRARY_NONFREE_LIST="
1560     decklink
1561     libndi_newtek
1562     libfdk_aac
1563     openssl
1564 "
1565
1566 EXTERNAL_LIBRARY_VERSION3_LIST="
1567     gmp
1568     libopencore_amrnb
1569     libopencore_amrwb
1570     libvo_amrwbenc
1571     rkmpp
1572 "
1573
1574 EXTERNAL_LIBRARY_GPLV3_LIST="
1575     libsmbclient
1576 "
1577
1578 EXTERNAL_LIBRARY_LIST="
1579     $EXTERNAL_AUTODETECT_LIBRARY_LIST
1580     $EXTERNAL_LIBRARY_GPL_LIST
1581     $EXTERNAL_LIBRARY_NONFREE_LIST
1582     $EXTERNAL_LIBRARY_VERSION3_LIST
1583     $EXTERNAL_LIBRARY_GPLV3_LIST
1584     chromaprint
1585     gcrypt
1586     gnutls
1587     jni
1588     ladspa
1589     libass
1590     libbluray
1591     libbs2b
1592     libcaca
1593     libcelt
1594     libdc1394
1595     libdrm
1596     libflite
1597     libfontconfig
1598     libfreetype
1599     libfribidi
1600     libgme
1601     libgsm
1602     libiec61883
1603     libilbc
1604     libkvazaar
1605     libmodplug
1606     libmp3lame
1607     libmysofa
1608     libopencv
1609     libopenh264
1610     libopenjpeg
1611     libopenmpt
1612     libopus
1613     libpulse
1614     librsvg
1615     librtmp
1616     libshine
1617     libsmbclient
1618     libsnappy
1619     libsoxr
1620     libspeex
1621     libssh
1622     libtesseract
1623     libtheora
1624     libtwolame
1625     libv4l2
1626     libvmaf
1627     libvorbis
1628     libvpx
1629     libwavpack
1630     libwebp
1631     libxml2
1632     libzimg
1633     libzmq
1634     libzvbi
1635     mediacodec
1636     openal
1637     opencl
1638     opengl
1639 "
1640
1641 HWACCEL_AUTODETECT_LIBRARY_LIST="
1642     audiotoolbox
1643     crystalhd
1644     cuda
1645     cuvid
1646     d3d11va
1647     dxva2
1648     nvenc
1649     vaapi
1650     vda
1651     vdpau
1652     videotoolbox
1653     v4l2_m2m
1654     xvmc
1655 "
1656
1657 HWACCEL_LIBRARY_NONFREE_LIST="
1658     cuda_sdk
1659     libnpp
1660 "
1661
1662 HWACCEL_LIBRARY_LIST="
1663     $HWACCEL_AUTODETECT_LIBRARY_LIST
1664     $HWACCEL_LIBRARY_NONFREE_LIST
1665     libmfx
1666     mmal
1667     omx
1668 "
1669
1670 DOCUMENT_LIST="
1671     doc
1672     htmlpages
1673     manpages
1674     podpages
1675     txtpages
1676 "
1677
1678 FEATURE_LIST="
1679     ftrapv
1680     gray
1681     hardcoded_tables
1682     omx_rpi
1683     runtime_cpudetect
1684     safe_bitstream_reader
1685     shared
1686     small
1687     static
1688     swscale_alpha
1689 "
1690
1691 LIBRARY_LIST="
1692     avcodec
1693     avdevice
1694     avfilter
1695     avformat
1696     avresample
1697     avutil
1698     postproc
1699     swresample
1700     swscale
1701 "
1702
1703 LICENSE_LIST="
1704     gpl
1705     nonfree
1706     version3
1707 "
1708
1709 PROGRAM_LIST="
1710     ffplay
1711     ffprobe
1712     ffserver
1713     ffmpeg
1714 "
1715
1716 SUBSYSTEM_LIST="
1717     dct
1718     dwt
1719     error_resilience
1720     faan
1721     fast_unaligned
1722     fft
1723     lsp
1724     lzo
1725     mdct
1726     pixelutils
1727     network
1728     rdft
1729 "
1730
1731 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1732 CONFIG_LIST="
1733     $DOCUMENT_LIST
1734     $EXAMPLE_LIST
1735     $EXTERNAL_LIBRARY_LIST
1736     $HWACCEL_LIBRARY_LIST
1737     $FEATURE_LIST
1738     $LICENSE_LIST
1739     $LIBRARY_LIST
1740     $PROGRAM_LIST
1741     $SUBSYSTEM_LIST
1742     autodetect
1743     fontconfig
1744     linux_perf
1745     memory_poisoning
1746     neon_clobber_test
1747     ossfuzz
1748     pic
1749     thumb
1750     valgrind_backtrace
1751     xmm_clobber_test
1752     $COMPONENT_LIST
1753 "
1754
1755 THREADS_LIST="
1756     pthreads
1757     os2threads
1758     w32threads
1759 "
1760
1761 ATOMICS_LIST="
1762     atomics_gcc
1763     atomics_suncc
1764     atomics_win32
1765 "
1766
1767 AUTODETECT_LIBS="
1768     $EXTERNAL_AUTODETECT_LIBRARY_LIST
1769     $HWACCEL_AUTODETECT_LIBRARY_LIST
1770     $THREADS_LIST
1771 "
1772
1773 ARCH_LIST="
1774     aarch64
1775     alpha
1776     arm
1777     avr32
1778     avr32_ap
1779     avr32_uc
1780     bfin
1781     ia64
1782     m68k
1783     mips
1784     mips64
1785     parisc
1786     ppc
1787     ppc64
1788     s390
1789     sh4
1790     sparc
1791     sparc64
1792     tilegx
1793     tilepro
1794     tomi
1795     x86
1796     x86_32
1797     x86_64
1798 "
1799
1800 ARCH_EXT_LIST_ARM="
1801     armv5te
1802     armv6
1803     armv6t2
1804     armv8
1805     neon
1806     vfp
1807     vfpv3
1808     setend
1809 "
1810
1811 ARCH_EXT_LIST_MIPS="
1812     mipsfpu
1813     mips32r2
1814     mips32r5
1815     mips64r2
1816     mips32r6
1817     mips64r6
1818     mipsdsp
1819     mipsdspr2
1820     msa
1821 "
1822
1823 ARCH_EXT_LIST_LOONGSON="
1824     loongson2
1825     loongson3
1826     mmi
1827 "
1828
1829 ARCH_EXT_LIST_X86_SIMD="
1830     aesni
1831     amd3dnow
1832     amd3dnowext
1833     avx
1834     avx2
1835     fma3
1836     fma4
1837     mmx
1838     mmxext
1839     sse
1840     sse2
1841     sse3
1842     sse4
1843     sse42
1844     ssse3
1845     xop
1846 "
1847
1848 ARCH_EXT_LIST_PPC="
1849     altivec
1850     dcbzl
1851     ldbrx
1852     power8
1853     ppc4xx
1854     vsx
1855 "
1856
1857 ARCH_EXT_LIST_X86="
1858     $ARCH_EXT_LIST_X86_SIMD
1859     cpunop
1860     i686
1861 "
1862
1863 ARCH_EXT_LIST="
1864     $ARCH_EXT_LIST_ARM
1865     $ARCH_EXT_LIST_PPC
1866     $ARCH_EXT_LIST_X86
1867     $ARCH_EXT_LIST_MIPS
1868     $ARCH_EXT_LIST_LOONGSON
1869 "
1870
1871 ARCH_FEATURES="
1872     aligned_stack
1873     fast_64bit
1874     fast_clz
1875     fast_cmov
1876     local_aligned_8
1877     local_aligned_16
1878     local_aligned_32
1879     simd_align_16
1880     simd_align_32
1881 "
1882
1883 BUILTIN_LIST="
1884     atomic_cas_ptr
1885     machine_rw_barrier
1886     MemoryBarrier
1887     mm_empty
1888     rdtsc
1889     sarestart
1890     sem_timedwait
1891     sync_val_compare_and_swap
1892 "
1893 HAVE_LIST_CMDLINE="
1894     inline_asm
1895     symver
1896     x86asm
1897 "
1898
1899 HAVE_LIST_PUB="
1900     bigendian
1901     fast_unaligned
1902 "
1903
1904 HEADERS_LIST="
1905     altivec_h
1906     arpa_inet_h
1907     asm_types_h
1908     cdio_paranoia_h
1909     cdio_paranoia_paranoia_h
1910     cuda_h
1911     d3d11_h
1912     dispatch_dispatch_h
1913     dev_bktr_ioctl_bt848_h
1914     dev_bktr_ioctl_meteor_h
1915     dev_ic_bt8xx_h
1916     dev_video_bktr_ioctl_bt848_h
1917     dev_video_meteor_ioctl_meteor_h
1918     direct_h
1919     dirent_h
1920     dlfcn_h
1921     dxgidebug_h
1922     dxva_h
1923     ES2_gl_h
1924     gsm_h
1925     io_h
1926     mach_mach_time_h
1927     machine_ioctl_bt848_h
1928     machine_ioctl_meteor_h
1929     malloc_h
1930     opencv2_core_core_c_h
1931     openjpeg_2_2_openjpeg_h
1932     openjpeg_2_1_openjpeg_h
1933     openjpeg_2_0_openjpeg_h
1934     openjpeg_1_5_openjpeg_h
1935     OpenGL_gl3_h
1936     poll_h
1937     soundcard_h
1938     stdatomic_h
1939     sys_mman_h
1940     sys_param_h
1941     sys_resource_h
1942     sys_select_h
1943     sys_soundcard_h
1944     sys_time_h
1945     sys_un_h
1946     sys_videoio_h
1947     termios_h
1948     udplite_h
1949     unistd_h
1950     valgrind_valgrind_h
1951     windows_h
1952     winsock2_h
1953 "
1954
1955 INTRINSICS_LIST="
1956     intrinsics_neon
1957 "
1958
1959 COMPLEX_FUNCS="
1960     cabs
1961     cexp
1962 "
1963
1964 MATH_FUNCS="
1965     atanf
1966     atan2f
1967     cbrt
1968     cbrtf
1969     copysign
1970     cosf
1971     erf
1972     exp2
1973     exp2f
1974     expf
1975     hypot
1976     isfinite
1977     isinf
1978     isnan
1979     ldexpf
1980     llrint
1981     llrintf
1982     log2
1983     log2f
1984     log10f
1985     lrint
1986     lrintf
1987     powf
1988     rint
1989     round
1990     roundf
1991     sinf
1992     trunc
1993     truncf
1994 "
1995
1996 SYSTEM_FUNCS="
1997     access
1998     aligned_malloc
1999     arc4random
2000     clock_gettime
2001     closesocket
2002     CommandLineToArgvW
2003     CoTaskMemFree
2004     CryptGenRandom
2005     dlopen
2006     fcntl
2007     flt_lim
2008     fork
2009     getaddrinfo
2010     gethrtime
2011     getopt
2012     GetProcessAffinityMask
2013     GetProcessMemoryInfo
2014     GetProcessTimes
2015     getrusage
2016     GetSystemTimeAsFileTime
2017     gettimeofday
2018     glob
2019     glXGetProcAddress
2020     gmtime_r
2021     inet_aton
2022     isatty
2023     jack_port_get_latency_range
2024     kbhit
2025     LoadLibrary
2026     localtime_r
2027     lstat
2028     lzo1x_999_compress
2029     mach_absolute_time
2030     MapViewOfFile
2031     memalign
2032     mkstemp
2033     mmap
2034     mprotect
2035     nanosleep
2036     PeekNamedPipe
2037     posix_memalign
2038     pthread_cancel
2039     sched_getaffinity
2040     SetConsoleTextAttribute
2041     SetConsoleCtrlHandler
2042     setmode
2043     setrlimit
2044     Sleep
2045     strerror_r
2046     sysconf
2047     sysctl
2048     usleep
2049     UTGetOSTypeFromString
2050     VirtualAlloc
2051     wglGetProcAddress
2052 "
2053
2054 TOOLCHAIN_FEATURES="
2055     as_dn_directive
2056     as_fpu_directive
2057     as_func
2058     as_object_arch
2059     asm_mod_q
2060     attribute_may_alias
2061     attribute_packed
2062     blocks_extension
2063     ebp_available
2064     ebx_available
2065     gnu_as
2066     gnu_windres
2067     ibm_asm
2068     inline_asm_direct_symbol_refs
2069     inline_asm_labels
2070     inline_asm_nonlocal_labels
2071     pragma_deprecated
2072     rsync_contimeout
2073     symver_asm_label
2074     symver_gnu_asm
2075     vfp_args
2076     xform_asm
2077     xmm_clobbers
2078 "
2079
2080 TYPES_LIST="
2081     CONDITION_VARIABLE_Ptr
2082     socklen_t
2083     struct_addrinfo
2084     struct_group_source_req
2085     struct_ip_mreq_source
2086     struct_ipv6_mreq
2087     struct_msghdr_msg_flags
2088     struct_pollfd
2089     struct_rusage_ru_maxrss
2090     struct_sctp_event_subscribe
2091     struct_sockaddr_in6
2092     struct_sockaddr_sa_len
2093     struct_sockaddr_storage
2094     struct_stat_st_mtim_tv_nsec
2095     struct_v4l2_frmivalenum_discrete
2096 "
2097
2098 HAVE_LIST="
2099     $ARCH_EXT_LIST
2100     $(add_suffix _external $ARCH_EXT_LIST)
2101     $(add_suffix _inline   $ARCH_EXT_LIST)
2102     $ARCH_FEATURES
2103     $ATOMICS_LIST
2104     $BUILTIN_LIST
2105     $COMPLEX_FUNCS
2106     $HAVE_LIST_CMDLINE
2107     $HAVE_LIST_PUB
2108     $HEADERS_LIST
2109     $INTRINSICS_LIST
2110     $MATH_FUNCS
2111     $SYSTEM_FUNCS
2112     $THREADS_LIST
2113     $TOOLCHAIN_FEATURES
2114     $TYPES_LIST
2115     atomics_native
2116     dos_paths
2117     libc_msvcrt
2118     makeinfo
2119     makeinfo_html
2120     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
2121     perl
2122     pod2man
2123     section_data_rel_ro
2124     texi2html
2125     threads
2126     uwp
2127     vaapi_drm
2128     vaapi_x11
2129     vdpau_x11
2130     winrt
2131 "
2132
2133 # options emitted with CONFIG_ prefix but not available on the command line
2134 CONFIG_EXTRA="
2135     aandcttables
2136     ac3dsp
2137     audio_frame_queue
2138     audiodsp
2139     blockdsp
2140     bswapdsp
2141     cabac
2142     dirac_parse
2143     dvprofile
2144     exif
2145     faandct
2146     faanidct
2147     fdctdsp
2148     flacdsp
2149     fmtconvert
2150     frame_thread_encoder
2151     g722dsp
2152     golomb
2153     gplv3
2154     h263dsp
2155     h264chroma
2156     h264dsp
2157     h264parse
2158     h264pred
2159     h264qpel
2160     hevcparse
2161     hpeldsp
2162     huffman
2163     huffyuvdsp
2164     huffyuvencdsp
2165     idctdsp
2166     iirfilter
2167     mdct15
2168     intrax8
2169     iso_media
2170     ividsp
2171     jpegtables
2172     lgplv3
2173     libx262
2174     llauddsp
2175     llviddsp
2176     llvidencdsp
2177     lpc
2178     lzf
2179     me_cmp
2180     mpeg_er
2181     mpegaudio
2182     mpegaudiodsp
2183     mpegaudioheader
2184     mpegvideo
2185     mpegvideoenc
2186     mss34dsp
2187     pixblockdsp
2188     qpeldsp
2189     qsv
2190     qsvdec
2191     qsvenc
2192     rangecoder
2193     riffdec
2194     riffenc
2195     rtpdec
2196     rtpenc_chain
2197     rv34dsp
2198     sinewin
2199     snappy
2200     srtp
2201     startcode
2202     texturedsp
2203     texturedspenc
2204     tpeldsp
2205     vaapi_encode
2206     vc1dsp
2207     videodsp
2208     vp3dsp
2209     vp56dsp
2210     vp8dsp
2211     wma_freqs
2212     wmv2dsp
2213 "
2214
2215 CMDLINE_SELECT="
2216     $ARCH_EXT_LIST
2217     $CONFIG_LIST
2218     $HAVE_LIST_CMDLINE
2219     $THREADS_LIST
2220     asm
2221     cross_compile
2222     debug
2223     extra_warnings
2224     logging
2225     lto
2226     optimizations
2227     rpath
2228     stripping
2229 "
2230
2231 PATHS_LIST="
2232     bindir
2233     datadir
2234     docdir
2235     incdir
2236     libdir
2237     mandir
2238     pkgconfigdir
2239     prefix
2240     shlibdir
2241     install_name_dir
2242 "
2243
2244 CMDLINE_SET="
2245     $PATHS_LIST
2246     ar
2247     arch
2248     as
2249     assert_level
2250     build_suffix
2251     cc
2252     objcc
2253     cpu
2254     cross_prefix
2255     custom_allocator
2256     cxx
2257     dep_cc
2258     doxygen
2259     env
2260     extra_version
2261     gas
2262     host_cc
2263     host_cflags
2264     host_extralibs
2265     host_ld
2266     host_ldflags
2267     host_os
2268     ignore_tests
2269     install
2270     ld
2271     ln_s
2272     logfile
2273     malloc_prefix
2274     nm
2275     optflags
2276     nvccflags
2277     pkg_config
2278     pkg_config_flags
2279     progs_suffix
2280     random_seed
2281     ranlib
2282     samples
2283     strip
2284     sws_max_filter_size
2285     sysinclude
2286     sysroot
2287     target_exec
2288     target_os
2289     target_path
2290     target_samples
2291     tempprefix
2292     toolchain
2293     valgrind
2294     x86asmexe
2295 "
2296
2297 CMDLINE_APPEND="
2298     extra_cflags
2299     extra_cxxflags
2300     extra_objcflags
2301     host_cppflags
2302 "
2303
2304 # code dependency declarations
2305
2306 # architecture extensions
2307
2308 armv5te_deps="arm"
2309 armv6_deps="arm"
2310 armv6t2_deps="arm"
2311 armv8_deps="aarch64"
2312 neon_deps_any="aarch64 arm"
2313 intrinsics_neon_deps="neon"
2314 vfp_deps_any="aarch64 arm"
2315 vfpv3_deps="vfp"
2316 setend_deps="arm"
2317
2318 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
2319
2320 loongson2_deps="mips"
2321 loongson3_deps="mips"
2322 mipsfpu_deps="mips"
2323 mipsdsp_deps="mips"
2324 mipsdspr2_deps="mips"
2325 mips32r2_deps="mips"
2326 mips32r5_deps="mips"
2327 mips32r6_deps="mips"
2328 mips64r2_deps="mips"
2329 mips64r6_deps="mips"
2330 msa_deps="mipsfpu"
2331 mmi_deps="mips"
2332
2333 altivec_deps="ppc"
2334 dcbzl_deps="ppc"
2335 ldbrx_deps="ppc"
2336 ppc4xx_deps="ppc"
2337 vsx_deps="altivec"
2338 power8_deps="vsx"
2339
2340 cpunop_deps="i686"
2341 x86_64_select="i686"
2342 x86_64_suggest="fast_cmov"
2343
2344 amd3dnow_deps="mmx"
2345 amd3dnowext_deps="amd3dnow"
2346 i686_deps="x86"
2347 mmx_deps="x86"
2348 mmxext_deps="mmx"
2349 sse_deps="mmxext"
2350 sse2_deps="sse"
2351 sse3_deps="sse2"
2352 ssse3_deps="sse3"
2353 sse4_deps="ssse3"
2354 sse42_deps="sse4"
2355 aesni_deps="sse42"
2356 avx_deps="sse42"
2357 xop_deps="avx"
2358 fma3_deps="avx"
2359 fma4_deps="avx"
2360 avx2_deps="avx"
2361
2362 mmx_external_deps="x86asm"
2363 mmx_inline_deps="inline_asm"
2364 mmx_suggest="mmx_external mmx_inline"
2365
2366 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2367     eval dep=\$${ext}_deps
2368     eval ${ext}_external_deps='"${dep}_external"'
2369     eval ${ext}_inline_deps='"${dep}_inline"'
2370     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2371 done
2372
2373 aligned_stack_if_any="aarch64 ppc x86"
2374 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2375 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2376 fast_unaligned_if_any="aarch64 ppc x86"
2377 simd_align_16_if_any="altivec neon sse"
2378 simd_align_32_if_any="avx"
2379
2380 # system capabilities
2381 symver_if_any="symver_asm_label symver_gnu_asm"
2382 valgrind_backtrace_conflict="optimizations"
2383 valgrind_backtrace_deps="valgrind_valgrind_h"
2384
2385 # threading support
2386 atomics_gcc_if="sync_val_compare_and_swap"
2387 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2388 atomics_win32_if="MemoryBarrier"
2389 atomics_native_if_any="$ATOMICS_LIST"
2390 w32threads_deps="atomics_native"
2391 threads_if_any="$THREADS_LIST"
2392
2393 # subsystems
2394 dct_select="rdft"
2395 dirac_parse_select="golomb"
2396 error_resilience_select="me_cmp"
2397 faandct_deps="faan fdctdsp"
2398 faanidct_deps="faan idctdsp"
2399 h264dsp_select="startcode"
2400 hevcparse_select="golomb"
2401 frame_thread_encoder_deps="encoders threads"
2402 intrax8_select="blockdsp idctdsp"
2403 mdct_select="fft"
2404 mdct15_select="fft"
2405 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2406 mpeg_er_select="error_resilience"
2407 mpegaudio_select="mpegaudiodsp mpegaudioheader"
2408 mpegaudiodsp_select="dct"
2409 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp mpeg_er videodsp"
2410 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2411 vc1dsp_select="h264chroma qpeldsp startcode"
2412 rdft_select="fft"
2413
2414 # decoders / encoders
2415 aac_decoder_select="mdct15 mdct sinewin"
2416 aac_fixed_decoder_select="mdct sinewin"
2417 aac_encoder_select="audio_frame_queue iirfilter lpc mdct sinewin"
2418 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2419 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2420 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2421 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2422 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2423 adpcm_g722_decoder_select="g722dsp"
2424 adpcm_g722_encoder_select="g722dsp"
2425 aic_decoder_select="golomb idctdsp"
2426 alac_encoder_select="lpc"
2427 als_decoder_select="bswapdsp"
2428 amrnb_decoder_select="lsp"
2429 amrwb_decoder_select="lsp"
2430 amv_decoder_select="sp5x_decoder exif"
2431 amv_encoder_select="aandcttables jpegtables mpegvideoenc"
2432 ape_decoder_select="bswapdsp llauddsp"
2433 apng_decoder_select="zlib"
2434 apng_encoder_select="llvidencdsp zlib"
2435 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2436 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2437 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2438 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2439 atrac1_decoder_select="mdct sinewin"
2440 atrac3_decoder_select="mdct"
2441 atrac3p_decoder_select="mdct sinewin"
2442 avrn_decoder_select="exif jpegtables"
2443 bink_decoder_select="blockdsp hpeldsp"
2444 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2445 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2446 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2447 clearvideo_decoder_select="idctdsp"
2448 cllc_decoder_select="bswapdsp"
2449 comfortnoise_encoder_select="lpc"
2450 cook_decoder_select="audiodsp mdct sinewin"
2451 cscd_decoder_select="lzo"
2452 cscd_decoder_suggest="zlib"
2453 dca_decoder_select="mdct"
2454 dds_decoder_select="texturedsp"
2455 dirac_decoder_select="dirac_parse dwt golomb videodsp mpegvideoenc"
2456 dnxhd_decoder_select="blockdsp idctdsp"
2457 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2458 dolby_e_decoder_select="mdct"
2459 dvvideo_decoder_select="dvprofile idctdsp"
2460 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2461 dxa_decoder_select="zlib"
2462 dxv_decoder_select="lzf texturedsp"
2463 eac3_decoder_select="ac3_decoder"
2464 eac3_encoder_select="ac3_encoder"
2465 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2466 eatgq_decoder_select="aandcttables"
2467 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2468 exr_decoder_select="zlib"
2469 ffv1_decoder_select="rangecoder"
2470 ffv1_encoder_select="rangecoder"
2471 ffvhuff_decoder_select="huffyuv_decoder"
2472 ffvhuff_encoder_select="huffyuv_encoder"
2473 fic_decoder_select="golomb"
2474 flac_decoder_select="flacdsp"
2475 flac_encoder_select="bswapdsp flacdsp lpc"
2476 flashsv2_decoder_select="zlib"
2477 flashsv2_encoder_select="zlib"
2478 flashsv_decoder_select="zlib"
2479 flashsv_encoder_select="zlib"
2480 flv_decoder_select="h263_decoder"
2481 flv_encoder_select="h263_encoder"
2482 fourxm_decoder_select="blockdsp bswapdsp"
2483 fraps_decoder_select="bswapdsp huffman"
2484 g2m_decoder_select="blockdsp idctdsp jpegtables zlib"
2485 g729_decoder_select="audiodsp"
2486 h261_decoder_select="mpegvideo"
2487 h261_encoder_select="aandcttables mpegvideoenc"
2488 h263_decoder_select="h263_parser h263dsp mpegvideo qpeldsp"
2489 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2490 h263i_decoder_select="h263_decoder"
2491 h263p_decoder_select="h263_decoder"
2492 h263p_encoder_select="h263_encoder"
2493 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2494 h264_decoder_suggest="error_resilience"
2495 hap_decoder_select="snappy texturedsp"
2496 hap_encoder_deps="libsnappy"
2497 hap_encoder_select="texturedspenc"
2498 hevc_decoder_select="bswapdsp cabac golomb hevcparse videodsp"
2499 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2500 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llvidencdsp"
2501 iac_decoder_select="imc_decoder"
2502 imc_decoder_select="bswapdsp fft mdct sinewin"
2503 indeo3_decoder_select="hpeldsp"
2504 indeo4_decoder_select="ividsp"
2505 indeo5_decoder_select="ividsp"
2506 interplay_video_decoder_select="hpeldsp"
2507 jpegls_decoder_select="mjpeg_decoder"
2508 jv_decoder_select="blockdsp"
2509 lagarith_decoder_select="llviddsp"
2510 ljpeg_encoder_select="aandcttables idctdsp jpegtables mpegvideoenc"
2511 magicyuv_decoder_select="llviddsp"
2512 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2513 metasound_decoder_select="lsp mdct sinewin"
2514 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2515 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp jpegtables"
2516 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2517 mjpegb_decoder_select="mjpeg_decoder"
2518 mlp_decoder_select="mlp_parser"
2519 mlp_encoder_select="lpc"
2520 motionpixels_decoder_select="bswapdsp"
2521 mp1_decoder_select="mpegaudio"
2522 mp1float_decoder_select="mpegaudio"
2523 mp2_decoder_select="mpegaudio"
2524 mp2float_decoder_select="mpegaudio"
2525 mp3_decoder_select="mpegaudio"
2526 mp3adu_decoder_select="mpegaudio"
2527 mp3adufloat_decoder_select="mpegaudio"
2528 mp3float_decoder_select="mpegaudio"
2529 mp3on4_decoder_select="mpegaudio"
2530 mp3on4float_decoder_select="mpegaudio"
2531 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2532 mpc8_decoder_select="mpegaudiodsp"
2533 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2534 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2535 mpegvideo_decoder_select="mpegvideo"
2536 mpeg1video_decoder_select="mpegvideo"
2537 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2538 mpeg2video_decoder_select="mpegvideo"
2539 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2540 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2541 mpeg4_encoder_select="h263_encoder"
2542 msa1_decoder_select="mss34dsp"
2543 mscc_decoder_select="zlib"
2544 msmpeg4v1_decoder_select="h263_decoder"
2545 msmpeg4v2_decoder_select="h263_decoder"
2546 msmpeg4v2_encoder_select="h263_encoder"
2547 msmpeg4v3_decoder_select="h263_decoder"
2548 msmpeg4v3_encoder_select="h263_encoder"
2549 mss2_decoder_select="mpegvideo qpeldsp vc1_decoder"
2550 mts2_decoder_select="mss34dsp"
2551 mxpeg_decoder_select="mjpeg_decoder"
2552 nellymoser_decoder_select="mdct sinewin"
2553 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2554 nuv_decoder_select="idctdsp lzo"
2555 on2avc_decoder_select="mdct"
2556 opus_decoder_deps="swresample"
2557 opus_decoder_select="mdct15"
2558 opus_encoder_select="audio_frame_queue mdct15"
2559 png_decoder_select="zlib"
2560 png_encoder_select="llvidencdsp zlib"
2561 prores_decoder_select="blockdsp idctdsp"
2562 prores_encoder_select="fdctdsp"
2563 qcelp_decoder_select="lsp"
2564 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2565 ra_144_decoder_select="audiodsp"
2566 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2567 ralf_decoder_select="golomb"
2568 rawvideo_decoder_select="bswapdsp"
2569 rscc_decoder_select="zlib"
2570 rtjpeg_decoder_select="me_cmp"
2571 rv10_decoder_select="h263_decoder"
2572 rv10_encoder_select="h263_encoder"
2573 rv20_decoder_select="h263_decoder"
2574 rv20_encoder_select="h263_encoder"
2575 rv30_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2576 rv40_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2577 screenpresso_decoder_select="zlib"
2578 shorten_decoder_select="bswapdsp"
2579 sipr_decoder_select="lsp"
2580 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2581 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2582 sonic_decoder_select="golomb rangecoder"
2583 sonic_encoder_select="golomb rangecoder"
2584 sonic_ls_encoder_select="golomb rangecoder"
2585 sp5x_decoder_select="mjpeg_decoder"
2586 srgc_decoder_select="zlib"
2587 svq1_decoder_select="hpeldsp"
2588 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2589 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2590 svq3_decoder_suggest="zlib"
2591 tak_decoder_select="audiodsp"
2592 tdsc_decoder_select="zlib mjpeg_decoder"
2593 theora_decoder_select="vp3_decoder"
2594 thp_decoder_select="mjpeg_decoder"
2595 tiff_decoder_suggest="zlib lzma"
2596 tiff_encoder_suggest="zlib"
2597 truehd_decoder_select="mlp_parser"
2598 truehd_encoder_select="lpc"
2599 truemotion2_decoder_select="bswapdsp"
2600 truespeech_decoder_select="bswapdsp"
2601 tscc_decoder_select="zlib"
2602 twinvq_decoder_select="mdct lsp sinewin"
2603 txd_decoder_select="texturedsp"
2604 utvideo_decoder_select="bswapdsp llviddsp"
2605 utvideo_encoder_select="bswapdsp huffman llvidencdsp"
2606 vble_decoder_select="llviddsp"
2607 vc1_decoder_select="blockdsp h263_decoder h264qpel intrax8 mpegvideo vc1dsp"
2608 vc1_qsv_decoder_deps="libmfx"
2609 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2610 vc1image_decoder_select="vc1_decoder"
2611 vorbis_decoder_select="mdct"
2612 vorbis_encoder_select="mdct"
2613 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2614 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2615 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2616 vp6a_decoder_select="vp6_decoder"
2617 vp6f_decoder_select="vp6_decoder"
2618 vp7_decoder_select="h264pred videodsp vp8dsp"
2619 vp8_decoder_select="h264pred videodsp vp8dsp"
2620 vp9_decoder_select="videodsp vp9_parser"
2621 webp_decoder_select="vp8_decoder exif"
2622 wmalossless_decoder_select="llauddsp"
2623 wmapro_decoder_select="mdct sinewin wma_freqs"
2624 wmav1_decoder_select="mdct sinewin wma_freqs"
2625 wmav1_encoder_select="mdct sinewin wma_freqs"
2626 wmav2_decoder_select="mdct sinewin wma_freqs"
2627 wmav2_encoder_select="mdct sinewin wma_freqs"
2628 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2629 wmv1_decoder_select="h263_decoder"
2630 wmv1_encoder_select="h263_encoder"
2631 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2632 wmv2_encoder_select="h263_encoder wmv2dsp"
2633 wmv3_decoder_select="vc1_decoder"
2634 wmv3image_decoder_select="wmv3_decoder"
2635 xma1_decoder_select="wmapro_decoder"
2636 xma2_decoder_select="wmapro_decoder"
2637 zerocodec_decoder_select="zlib"
2638 zlib_decoder_select="zlib"
2639 zlib_encoder_select="zlib"
2640 zmbv_decoder_select="zlib"
2641 zmbv_encoder_select="zlib"
2642
2643 # hardware accelerators
2644 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2645 cuda_deps_any="dlopen LoadLibrary"
2646 cuvid_deps="cuda"
2647 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder ID3D11VideoContext"
2648 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32"
2649 dxva2_extralibs="-luser32"
2650 vda_framework_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension"
2651 vda_framework_extralibs="-framework VideoDecodeAcceleration"
2652 vda_deps="vda_framework pthreads"
2653 vda_extralibs="-framework CoreFoundation -framework QuartzCore"
2654 videotoolbox_hwaccel_deps="videotoolbox pthreads"
2655 videotoolbox_hwaccel_extralibs="-framework QuartzCore"
2656 xvmc_deps="X11_extensions_XvMClib_h"
2657
2658 h263_vaapi_hwaccel_deps="vaapi"
2659 h263_vaapi_hwaccel_select="h263_decoder"
2660 h263_videotoolbox_hwaccel_deps="videotoolbox"
2661 h263_videotoolbox_hwaccel_select="h263_decoder"
2662 h264_cuvid_hwaccel_deps="cuda cuvid"
2663 h264_cuvid_hwaccel_select="h264_cuvid_decoder"
2664 h264_d3d11va_hwaccel_deps="d3d11va"
2665 h264_d3d11va_hwaccel_select="h264_decoder"
2666 h264_d3d11va2_hwaccel_deps="d3d11va"
2667 h264_d3d11va2_hwaccel_select="h264_decoder"
2668 h264_dxva2_hwaccel_deps="dxva2"
2669 h264_dxva2_hwaccel_select="h264_decoder"
2670 h264_mediacodec_hwaccel_deps="mediacodec"
2671 h264_mmal_hwaccel_deps="mmal"
2672 h264_qsv_hwaccel_deps="libmfx"
2673 h264_vaapi_hwaccel_deps="vaapi"
2674 h264_vaapi_hwaccel_select="h264_decoder"
2675 h264_vda_hwaccel_deps="vda"
2676 h264_vda_hwaccel_select="h264_decoder"
2677 h264_vda_old_hwaccel_deps="vda"
2678 h264_vda_old_hwaccel_select="h264_decoder"
2679 h264_vdpau_hwaccel_deps="vdpau"
2680 h264_vdpau_hwaccel_select="h264_decoder"
2681 h264_videotoolbox_hwaccel_deps="videotoolbox"
2682 h264_videotoolbox_hwaccel_select="h264_decoder"
2683 hevc_cuvid_hwaccel_deps="cuda cuvid"
2684 hevc_cuvid_hwaccel_select="hevc_cuvid_decoder"
2685 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2686 hevc_d3d11va_hwaccel_select="hevc_decoder"
2687 hevc_mediacodec_hwaccel_deps="mediacodec"
2688 hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2689 hevc_d3d11va2_hwaccel_select="hevc_decoder"
2690 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2691 hevc_dxva2_hwaccel_select="hevc_decoder"
2692 hevc_qsv_hwaccel_deps="libmfx"
2693 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2694 hevc_vaapi_hwaccel_select="hevc_decoder"
2695 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2696 hevc_vdpau_hwaccel_select="hevc_decoder"
2697 mjpeg_cuvid_hwaccel_deps="cuda cuvid"
2698 mjpeg_cuvid_hwaccel_select="mjpeg_cuvid_decoder"
2699 mpeg_xvmc_hwaccel_deps="xvmc"
2700 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2701 mpeg1_cuvid_hwaccel_deps="cuda cuvid"
2702 mpeg1_cuvid_hwaccel_select="mpeg1_cuvid_decoder"
2703 mpeg1_vdpau_hwaccel_deps="vdpau"
2704 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2705 mpeg1_videotoolbox_hwaccel_deps="videotoolbox"
2706 mpeg1_videotoolbox_hwaccel_select="mpeg1video_decoder"
2707 mpeg1_xvmc_hwaccel_deps="xvmc"
2708 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2709 mpeg2_cuvid_hwaccel_deps="cuda cuvid"
2710 mpeg2_cuvid_hwaccel_select="mpeg2_cuvid_decoder"
2711 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2712 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2713 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2714 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2715 mpeg2_dxva2_hwaccel_deps="dxva2"
2716 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2717 mpeg2_mediacodec_hwaccel_deps="mediacodec"
2718 mpeg2_mmal_hwaccel_deps="mmal"
2719 mpeg2_qsv_hwaccel_deps="libmfx"
2720 mpeg2_qsv_hwaccel_select="qsvdec_mpeg2"
2721 mpeg2_vaapi_hwaccel_deps="vaapi"
2722 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2723 mpeg2_vdpau_hwaccel_deps="vdpau"
2724 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2725 mpeg2_videotoolbox_hwaccel_deps="videotoolbox"
2726 mpeg2_videotoolbox_hwaccel_select="mpeg2video_decoder"
2727 mpeg2_xvmc_hwaccel_deps="xvmc"
2728 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2729 mpeg4_cuvid_hwaccel_deps="cuda cuvid"
2730 mpeg4_cuvid_hwaccel_select="mpeg4_cuvid_decoder"
2731 mpeg4_mediacodec_hwaccel_deps="mediacodec"
2732 mpeg4_mmal_hwaccel_deps="mmal"
2733 mpeg4_vaapi_hwaccel_deps="vaapi"
2734 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2735 mpeg4_vdpau_hwaccel_deps="vdpau"
2736 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2737 mpeg4_videotoolbox_hwaccel_deps="videotoolbox"
2738 mpeg4_videotoolbox_hwaccel_select="mpeg4_decoder"
2739 vc1_cuvid_hwaccel_deps="cuda cuvid"
2740 vc1_cuvid_hwaccel_select="vc1_cuvid_decoder"
2741 vc1_d3d11va_hwaccel_deps="d3d11va"
2742 vc1_d3d11va_hwaccel_select="vc1_decoder"
2743 vc1_d3d11va2_hwaccel_deps="d3d11va"
2744 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2745 vc1_dxva2_hwaccel_deps="dxva2"
2746 vc1_dxva2_hwaccel_select="vc1_decoder"
2747 vc1_mmal_hwaccel_deps="mmal"
2748 vc1_qsv_hwaccel_deps="libmfx"
2749 vc1_qsv_hwaccel_select="qsvdec_vc1"
2750 vc1_vaapi_hwaccel_deps="vaapi"
2751 vc1_vaapi_hwaccel_select="vc1_decoder"
2752 vc1_vdpau_hwaccel_deps="vdpau"
2753 vc1_vdpau_hwaccel_select="vc1_decoder"
2754 vp8_cuvid_hwaccel_deps="cuda cuvid"
2755 vp8_cuvid_hwaccel_select="vp8_cuvid_decoder"
2756 vp9_cuvid_hwaccel_deps="cuda cuvid"
2757 vp9_cuvid_hwaccel_select="vp9_cuvid_decoder"
2758 vp8_mediacodec_hwaccel_deps="mediacodec"
2759 vp8_qsv_hwaccel_deps="libmfx"
2760 vp9_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2761 vp9_d3d11va_hwaccel_select="vp9_decoder"
2762 vp9_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2763 vp9_d3d11va2_hwaccel_select="vp9_decoder"
2764 vp9_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_VP9"
2765 vp9_dxva2_hwaccel_select="vp9_decoder"
2766 vp9_mediacodec_hwaccel_deps="mediacodec"
2767 vp9_vaapi_hwaccel_deps="vaapi VADecPictureParameterBufferVP9_bit_depth"
2768 vp9_vaapi_hwaccel_select="vp9_decoder"
2769 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2770 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2771 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2772 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2773 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2774
2775 # hardware-accelerated codecs
2776 omx_deps="dlopen pthreads"
2777 omx_extralibs='$ldl'
2778 omx_rpi_select="omx"
2779 qsvdec_select="qsv"
2780 qsvenc_select="qsv"
2781 vaapi_encode_deps="vaapi"
2782 v4l2_m2m_deps_any="linux_videodev2_h"
2783
2784 hwupload_cuda_filter_deps="cuda"
2785 scale_npp_filter_deps="cuda libnpp"
2786 scale_cuda_filter_deps="cuda_sdk"
2787 thumbnail_cuda_filter_deps="cuda_sdk"
2788
2789 nvenc_deps="cuda"
2790 nvenc_deps_any="dlopen LoadLibrary"
2791 nvenc_encoder_deps="nvenc"
2792
2793 h263_v4l2m2m_decoder_deps="v4l2_m2m h263_v4l2_m2m"
2794 h263_v4l2m2m_encoder_deps="v4l2_m2m h263_v4l2_m2m"
2795 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2796 h264_cuvid_decoder_deps="cuda cuvid"
2797 h264_cuvid_decoder_select="h264_mp4toannexb_bsf"
2798 h264_mediacodec_decoder_deps="mediacodec"
2799 h264_mediacodec_decoder_select="h264_mp4toannexb_bsf h264_parser"
2800 h264_mmal_decoder_deps="mmal"
2801 h264_nvenc_encoder_deps="nvenc"
2802 h264_omx_encoder_deps="omx"
2803 h264_qsv_decoder_deps="libmfx"
2804 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2805 h264_qsv_encoder_deps="libmfx"
2806 h264_qsv_encoder_select="qsvenc"
2807 h264_rkmpp_decoder_deps="rkmpp"
2808 h264_rkmpp_decoder_select="h264_mp4toannexb_bsf"
2809 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2810 h264_vaapi_encoder_select="vaapi_encode golomb"
2811 h264_vda_decoder_deps="vda"
2812 h264_vda_decoder_select="h264_decoder"
2813 h264_vdpau_decoder_deps="vdpau"
2814 h264_vdpau_decoder_select="h264_decoder"
2815 h264_v4l2m2m_decoder_deps="v4l2_m2m h264_v4l2_m2m"
2816 h264_v4l2m2m_encoder_deps="v4l2_m2m h264_v4l2_m2m"
2817 hevc_cuvid_decoder_deps="cuda cuvid"
2818 hevc_cuvid_decoder_select="hevc_mp4toannexb_bsf"
2819 hevc_mediacodec_decoder_deps="mediacodec"
2820 hevc_mediacodec_decoder_select="hevc_mp4toannexb_bsf hevc_parser"
2821 hevc_nvenc_encoder_deps="nvenc"
2822 hevc_qsv_decoder_deps="libmfx"
2823 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
2824 hevc_qsv_encoder_deps="libmfx"
2825 hevc_qsv_encoder_select="hevcparse qsvenc"
2826 hevc_rkmpp_decoder_deps="rkmpp"
2827 hevc_rkmpp_decoder_select="hevc_mp4toannexb_bsf"
2828 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2829 hevc_vaapi_encoder_select="vaapi_encode golomb"
2830 hevc_v4l2m2m_decoder_deps="v4l2_m2m hevc_v4l2_m2m"
2831 hevc_v4l2m2m_encoder_deps="v4l2_m2m hevc_v4l2_m2m"
2832 mjpeg_cuvid_decoder_deps="cuda cuvid"
2833 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2834 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2835 mpeg1_cuvid_decoder_deps="cuda cuvid"
2836 mpeg1_vdpau_decoder_deps="vdpau"
2837 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2838 mpeg1_v4l2m2m_decoder_deps="v4l2_m2m mpeg1_v4l2_m2m"
2839 mpeg2_crystalhd_decoder_select="crystalhd"
2840 mpeg2_cuvid_decoder_deps="cuda cuvid"
2841 mpeg2_mmal_decoder_deps="mmal"
2842 mpeg2_mediacodec_decoder_deps="mediacodec"
2843 mpeg2_qsv_decoder_deps="libmfx"
2844 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel"
2845 mpeg2_qsv_encoder_deps="libmfx"
2846 mpeg2_qsv_encoder_select="qsvenc"
2847 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2848 mpeg2_vaapi_encoder_select="vaapi_encode"
2849 mpeg2_v4l2m2m_decoder_deps="v4l2_m2m mpeg2_v4l2_m2m"
2850 mpeg4_crystalhd_decoder_select="crystalhd"
2851 mpeg4_cuvid_decoder_deps="cuda cuvid"
2852 mpeg4_mediacodec_decoder_deps="mediacodec"
2853 mpeg4_mmal_decoder_deps="mmal"
2854 mpeg4_omx_encoder_deps="omx"
2855 mpeg4_vdpau_decoder_deps="vdpau"
2856 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2857 mpeg4_v4l2m2m_decoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
2858 mpeg4_v4l2m2m_encoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
2859 mpeg_vdpau_decoder_deps="vdpau"
2860 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2861 msmpeg4_crystalhd_decoder_select="crystalhd"
2862 nvenc_h264_encoder_select="h264_nvenc_encoder"
2863 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2864 vc1_crystalhd_decoder_select="crystalhd"
2865 vc1_cuvid_decoder_deps="cuda cuvid"
2866 vc1_mmal_decoder_deps="mmal"
2867 vc1_vdpau_decoder_deps="vdpau"
2868 vc1_vdpau_decoder_select="vc1_decoder"
2869 vc1_v4l2m2m_decoder_deps="v4l2_m2m vc1_v4l2_m2m"
2870 vp8_cuvid_decoder_deps="cuda cuvid"
2871 vp8_mediacodec_decoder_deps="mediacodec"
2872 vp8_qsv_decoder_deps="libmfx"
2873 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2874 vp8_rkmpp_decoder_deps="rkmpp"
2875 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2876 vp8_vaapi_encoder_select="vaapi_encode"
2877 vp8_v4l2m2m_decoder_deps="v4l2_m2m vp8_v4l2_m2m"
2878 vp8_v4l2m2m_encoder_deps="v4l2_m2m vp8_v4l2_m2m"
2879 vp9_cuvid_decoder_deps="cuda cuvid"
2880 vp9_mediacodec_decoder_deps="mediacodec"
2881 vp9_rkmpp_decoder_deps="rkmpp"
2882 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2883 vp9_vaapi_encoder_select="vaapi_encode"
2884 vp9_v4l2m2m_decoder_deps="v4l2_m2m vp9_v4l2_m2m"
2885 wmv3_crystalhd_decoder_select="crystalhd"
2886 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2887
2888 # parsers
2889 h264_parser_select="golomb h264dsp h264parse"
2890 hevc_parser_select="hevcparse"
2891 mpegaudio_parser_select="mpegaudioheader"
2892 mpegvideo_parser_select="mpegvideo"
2893 mpeg4video_parser_select="h263dsp mpegvideo qpeldsp"
2894 vc1_parser_select="vc1dsp"
2895
2896 # bitstream_filters
2897 mjpeg2jpeg_bsf_select="jpegtables"
2898
2899 # external libraries
2900 aac_at_decoder_deps="audiotoolbox"
2901 ac3_at_decoder_deps="audiotoolbox"
2902 ac3_at_decoder_select="ac3_parser"
2903 adpcm_ima_qt_at_decoder_deps="audiotoolbox"
2904 alac_at_decoder_deps="audiotoolbox"
2905 amr_nb_at_decoder_deps="audiotoolbox"
2906 avisynth_deps_any="dlopen LoadLibrary"
2907 avisynth_demuxer_deps="avisynth"
2908 avisynth_demuxer_select="riffdec"
2909 eac3_at_decoder_deps="audiotoolbox"
2910 eac3_at_decoder_select="ac3_parser"
2911 gsm_ms_at_decoder_deps="audiotoolbox"
2912 ilbc_at_decoder_deps="audiotoolbox"
2913 mp1_at_decoder_deps="audiotoolbox"
2914 mp2_at_decoder_deps="audiotoolbox"
2915 mp3_at_decoder_deps="audiotoolbox"
2916 mp1_at_decoder_select="mpegaudioheader"
2917 mp2_at_decoder_select="mpegaudioheader"
2918 mp3_at_decoder_select="mpegaudioheader"
2919 pcm_alaw_at_decoder_deps="audiotoolbox"
2920 pcm_mulaw_at_decoder_deps="audiotoolbox"
2921 qdmc_at_decoder_deps="audiotoolbox"
2922 qdm2_at_decoder_deps="audiotoolbox"
2923 aac_at_encoder_deps="audiotoolbox"
2924 aac_at_encoder_select="audio_frame_queue"
2925 alac_at_encoder_deps="audiotoolbox"
2926 alac_at_encoder_select="audio_frame_queue"
2927 ilbc_at_encoder_deps="audiotoolbox"
2928 ilbc_at_encoder_select="audio_frame_queue"
2929 pcm_alaw_at_encoder_deps="audiotoolbox"
2930 pcm_alaw_at_encoder_select="audio_frame_queue"
2931 pcm_mulaw_at_encoder_deps="audiotoolbox"
2932 pcm_mulaw_at_encoder_select="audio_frame_queue"
2933 chromaprint_muxer_deps="chromaprint"
2934 h264_videotoolbox_encoder_deps="videotoolbox_encoder pthreads"
2935 libcelt_decoder_deps="libcelt"
2936 libfdk_aac_decoder_deps="libfdk_aac"
2937 libfdk_aac_encoder_deps="libfdk_aac"
2938 libfdk_aac_encoder_select="audio_frame_queue"
2939 libgme_demuxer_deps="libgme"
2940 libgsm_decoder_deps="libgsm"
2941 libgsm_encoder_deps="libgsm"
2942 libgsm_ms_decoder_deps="libgsm"
2943 libgsm_ms_encoder_deps="libgsm"
2944 libilbc_decoder_deps="libilbc"
2945 libilbc_encoder_deps="libilbc"
2946 libkvazaar_encoder_deps="libkvazaar"
2947 libmodplug_demuxer_deps="libmodplug"
2948 libmp3lame_encoder_deps="libmp3lame"
2949 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2950 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2951 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2952 libopencore_amrnb_encoder_select="audio_frame_queue"
2953 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2954 libopenh264_decoder_deps="libopenh264"
2955 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2956 libopenh264_encoder_deps="libopenh264"
2957 libopenjpeg_decoder_deps="libopenjpeg"
2958 libopenjpeg_encoder_deps="libopenjpeg"
2959 libopenmpt_demuxer_deps="libopenmpt"
2960 libopus_decoder_deps="libopus"
2961 libopus_encoder_deps="libopus"
2962 libopus_encoder_select="audio_frame_queue"
2963 librsvg_decoder_deps="librsvg"
2964 libshine_encoder_deps="libshine"
2965 libshine_encoder_select="audio_frame_queue"
2966 libspeex_decoder_deps="libspeex"
2967 libspeex_encoder_deps="libspeex"
2968 libspeex_encoder_select="audio_frame_queue"
2969 libtheora_encoder_deps="libtheora"
2970 libtwolame_encoder_deps="libtwolame"
2971 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2972 libvorbis_decoder_deps="libvorbis"
2973 libvorbis_encoder_deps="libvorbis"
2974 libvorbis_encoder_select="audio_frame_queue"
2975 libvpx_vp8_decoder_deps="libvpx"
2976 libvpx_vp8_encoder_deps="libvpx"
2977 libvpx_vp9_decoder_deps="libvpx"
2978 libvpx_vp9_encoder_deps="libvpx"
2979 libwavpack_encoder_deps="libwavpack"
2980 libwavpack_encoder_select="audio_frame_queue"
2981 libwebp_encoder_deps="libwebp"
2982 libwebp_anim_encoder_deps="libwebp"
2983 libx262_encoder_deps="libx262"
2984 libx264_encoder_deps="libx264"
2985 libx264rgb_encoder_deps="libx264 x264_csp_bgr"
2986 libx264rgb_encoder_select="libx264_encoder"
2987 libx265_encoder_deps="libx265"
2988 libxavs_encoder_deps="libxavs"
2989 libxvid_encoder_deps="libxvid"
2990 libzvbi_teletext_decoder_deps="libzvbi"
2991 videotoolbox_extralibs="-framework CoreFoundation -framework VideoToolbox -framework CoreMedia -framework CoreVideo"
2992 videotoolbox_encoder_deps="videotoolbox VTCompressionSessionPrepareToEncodeFrames"
2993 videotoolbox_encoder_suggest="vda_framework"
2994
2995 # demuxers / muxers
2996 ac3_demuxer_select="ac3_parser"
2997 aiff_muxer_select="iso_media"
2998 asf_demuxer_select="riffdec"
2999 asf_o_demuxer_select="riffdec"
3000 asf_muxer_select="riffenc"
3001 asf_stream_muxer_select="asf_muxer"
3002 avi_demuxer_select="iso_media riffdec exif"
3003 avi_muxer_select="riffenc"
3004 caf_demuxer_select="iso_media riffdec"
3005 caf_muxer_select="iso_media"
3006 dash_muxer_select="mp4_muxer"
3007 dash_demuxer_deps="libxml2"
3008 dirac_demuxer_select="dirac_parser"
3009 dts_demuxer_select="dca_parser"
3010 dtshd_demuxer_select="dca_parser"
3011 dv_demuxer_select="dvprofile"
3012 dv_muxer_select="dvprofile"
3013 dxa_demuxer_select="riffdec"
3014 eac3_demuxer_select="ac3_parser"
3015 f4v_muxer_select="mov_muxer"
3016 fifo_muxer_deps="threads"
3017 flac_demuxer_select="flac_parser"
3018 hds_muxer_select="flv_muxer"
3019 hls_muxer_select="mpegts_muxer"
3020 image2_alias_pix_demuxer_select="image2_demuxer"
3021 image2_brender_pix_demuxer_select="image2_demuxer"
3022 ipod_muxer_select="mov_muxer"
3023 ismv_muxer_select="mov_muxer"
3024 matroska_audio_muxer_select="matroska_muxer"
3025 matroska_demuxer_select="iso_media riffdec"
3026 matroska_demuxer_suggest="bzlib lzo zlib"
3027 matroska_muxer_select="iso_media riffenc"
3028 mmf_muxer_select="riffenc"
3029 mov_demuxer_select="iso_media riffdec"
3030 mov_demuxer_suggest="zlib"
3031 mov_muxer_select="iso_media riffenc rtpenc_chain"
3032 mp3_demuxer_select="mpegaudio_parser"
3033 mp3_muxer_select="mpegaudioheader"
3034 mp4_muxer_select="mov_muxer"
3035 mpegts_demuxer_select="iso_media"
3036 mpegts_muxer_select="adts_muxer latm_muxer"
3037 mpegtsraw_demuxer_select="mpegts_demuxer"
3038 mxf_d10_muxer_select="mxf_muxer"
3039 mxf_opatom_muxer_select="mxf_muxer"
3040 nut_muxer_select="riffenc"
3041 nuv_demuxer_select="riffdec"
3042 oga_muxer_select="ogg_muxer"
3043 ogg_demuxer_select="dirac_parse"
3044 ogv_muxer_select="ogg_muxer"
3045 opus_muxer_select="ogg_muxer"
3046 psp_muxer_select="mov_muxer"
3047 rtp_demuxer_select="sdp_demuxer"
3048 rtp_muxer_select="golomb"
3049 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
3050 rtsp_demuxer_select="http_protocol rtpdec"
3051 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
3052 sap_demuxer_select="sdp_demuxer"
3053 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
3054 sdp_demuxer_select="rtpdec"
3055 smoothstreaming_muxer_select="ismv_muxer"
3056 spdif_muxer_select="aac_parser"
3057 spx_muxer_select="ogg_muxer"
3058 swf_demuxer_suggest="zlib"
3059 tak_demuxer_select="tak_parser"
3060 tg2_muxer_select="mov_muxer"
3061 tgp_muxer_select="mov_muxer"
3062 vobsub_demuxer_select="mpegps_demuxer"
3063 w64_demuxer_select="wav_demuxer"
3064 w64_muxer_select="wav_muxer"
3065 wav_demuxer_select="riffdec"
3066 wav_muxer_select="riffenc"
3067 webm_muxer_select="iso_media riffenc"
3068 webm_dash_manifest_demuxer_select="matroska_demuxer"
3069 wtv_demuxer_select="mpegts_demuxer riffdec"
3070 wtv_muxer_select="mpegts_muxer riffenc"
3071 xmv_demuxer_select="riffdec"
3072 xwma_demuxer_select="riffdec"
3073
3074 # indevs / outdevs
3075 alsa_indev_deps="alsa"
3076 alsa_outdev_deps="alsa"
3077 avfoundation_indev_deps="avfoundation pthreads"
3078 avfoundation_indev_extralibs="-framework Foundation -framework CoreVideo -framework CoreMedia"
3079 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
3080 caca_outdev_deps="libcaca"
3081 decklink_indev_deps="decklink threads"
3082 decklink_indev_extralibs="-lstdc++"
3083 decklink_outdev_deps="decklink threads"
3084 decklink_outdev_extralibs="-lstdc++"
3085 libndi_newtek_indev_deps="libndi_newtek"
3086 libndi_newtek_indev_extralibs="-lndi"
3087 libndi_newtek_outdev_deps="libndi_newtek"
3088 libndi_newtek_outdev_extralibs="-lndi"
3089 dshow_indev_deps="IBaseFilter"
3090 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi"
3091 fbdev_indev_deps="linux_fb_h"
3092 fbdev_outdev_deps="linux_fb_h"
3093 gdigrab_indev_deps="CreateDIBSection"
3094 gdigrab_indev_extralibs="-lgdi32"
3095 gdigrab_indev_select="bmp_decoder"
3096 iec61883_indev_deps="libiec61883"
3097 jack_indev_deps="jack"
3098 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
3099 kmsgrab_indev_deps="libdrm"
3100 lavfi_indev_deps="avfilter"
3101 libcdio_indev_deps="libcdio"
3102 libdc1394_indev_deps="libdc1394"
3103 libv4l2_indev_deps="libv4l2"
3104 openal_indev_deps="openal"
3105 opengl_outdev_deps="opengl"
3106 oss_indev_deps_any="soundcard_h sys_soundcard_h"
3107 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
3108 pulse_indev_deps="libpulse"
3109 pulse_outdev_deps="libpulse"
3110 sdl2_outdev_deps="sdl2"
3111 sndio_indev_deps="sndio"
3112 sndio_outdev_deps="sndio"
3113 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
3114 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
3115 vfwcap_indev_deps="vfw32 vfwcap_defines"
3116 xcbgrab_indev_deps="libxcb"
3117 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
3118 xv_outdev_extralibs="-lXv -lX11 -lXext"
3119
3120 # protocols
3121 async_protocol_deps="threads"
3122 bluray_protocol_deps="libbluray"
3123 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
3124 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
3125 ffrtmpcrypt_protocol_select="tcp_protocol"
3126 ffrtmphttp_protocol_conflict="librtmp_protocol"
3127 ffrtmphttp_protocol_select="http_protocol"
3128 ftp_protocol_select="tcp_protocol"
3129 gopher_protocol_select="network"
3130 http_protocol_select="tcp_protocol"
3131 httpproxy_protocol_select="tcp_protocol"
3132 https_protocol_select="tls_protocol"
3133 icecast_protocol_select="http_protocol"
3134 librtmp_protocol_deps="librtmp"
3135 librtmpe_protocol_deps="librtmp"
3136 librtmps_protocol_deps="librtmp"
3137 librtmpt_protocol_deps="librtmp"
3138 librtmpte_protocol_deps="librtmp"
3139 libsmbclient_protocol_deps="libsmbclient gplv3"
3140 libssh_protocol_deps="libssh"
3141 mmsh_protocol_select="http_protocol"
3142 mmst_protocol_select="network"
3143 rtmp_protocol_conflict="librtmp_protocol"
3144 rtmp_protocol_select="tcp_protocol"
3145 rtmpe_protocol_select="ffrtmpcrypt_protocol"
3146 rtmps_protocol_conflict="librtmp_protocol"
3147 rtmps_protocol_select="tls_protocol"
3148 rtmpt_protocol_select="ffrtmphttp_protocol"
3149 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
3150 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
3151 rtp_protocol_select="udp_protocol"
3152 sctp_protocol_deps="struct_sctp_event_subscribe struct_msghdr_msg_flags"
3153 sctp_protocol_select="network"
3154 srtp_protocol_select="rtp_protocol srtp"
3155 tcp_protocol_select="network"
3156 tls_gnutls_protocol_conflict="tls_schannel_protocol tls_securetransport_protocol"
3157 tls_gnutls_protocol_deps="gnutls"
3158 tls_gnutls_protocol_select="tcp_protocol"
3159 tls_openssl_protocol_conflict="tls_schannel_protocol tls_securetransport_protocol tls_gnutls_protocol"
3160 tls_openssl_protocol_deps="openssl"
3161 tls_openssl_protocol_select="tcp_protocol"
3162 tls_schannel_protocol_deps="schannel"
3163 tls_schannel_protocol_select="tcp_protocol"
3164 tls_securetransport_protocol_deps="securetransport"
3165 tls_securetransport_protocol_select="tcp_protocol"
3166 tls_protocol_deps_any="tls_schannel_protocol tls_securetransport_protocol tls_gnutls_protocol tls_openssl_protocol"
3167 udp_protocol_select="network"
3168 udplite_protocol_select="network"
3169 unix_protocol_deps="sys_un_h"
3170 unix_protocol_select="network"
3171
3172 # filters
3173 afftfilt_filter_deps="avcodec"
3174 afftfilt_filter_select="fft"
3175 afir_filter_deps="avcodec"
3176 afir_filter_select="fft"
3177 amovie_filter_deps="avcodec avformat"
3178 aresample_filter_deps="swresample"
3179 ass_filter_deps="libass"
3180 atempo_filter_deps="avcodec"
3181 atempo_filter_select="rdft"
3182 azmq_filter_deps="libzmq"
3183 blackframe_filter_deps="gpl"
3184 boxblur_filter_deps="gpl"
3185 bs2b_filter_deps="libbs2b"
3186 colormatrix_filter_deps="gpl"
3187 coreimage_filter_deps="coreimage appkit"
3188 coreimage_filter_extralibs="-framework OpenGL"
3189 coreimagesrc_filter_deps="coreimage appkit"
3190 coreimagesrc_filter_extralibs="-framework OpenGL"
3191 cover_rect_filter_deps="avcodec avformat gpl"
3192 cropdetect_filter_deps="gpl"
3193 deinterlace_qsv_filter_deps="libmfx"
3194 deinterlace_vaapi_filter_deps="vaapi"
3195 delogo_filter_deps="gpl"
3196 deshake_filter_select="pixelutils"
3197 drawtext_filter_deps="libfreetype"
3198 elbg_filter_deps="avcodec"
3199 eq_filter_deps="gpl"
3200 fftfilt_filter_deps="avcodec"
3201 fftfilt_filter_select="rdft"
3202 find_rect_filter_deps="avcodec avformat gpl"
3203 firequalizer_filter_deps="avcodec"
3204 firequalizer_filter_select="rdft"
3205 flite_filter_deps="libflite"
3206 framerate_filter_select="pixelutils"
3207 frei0r_filter_deps="frei0r dlopen"
3208 frei0r_src_filter_deps="frei0r dlopen"
3209 fspp_filter_deps="gpl"
3210 geq_filter_deps="gpl"
3211 histeq_filter_deps="gpl"
3212 hqdn3d_filter_deps="gpl"
3213 interlace_filter_deps="gpl"
3214 kerndeint_filter_deps="gpl"
3215 ladspa_filter_deps="ladspa dlopen"
3216 mcdeint_filter_deps="avcodec gpl"
3217 movie_filter_deps="avcodec avformat"
3218 mpdecimate_filter_deps="gpl"
3219 mpdecimate_filter_select="pixelutils"
3220 mptestsrc_filter_deps="gpl"
3221 negate_filter_deps="lut_filter"
3222 nnedi_filter_deps="gpl"
3223 ocr_filter_deps="libtesseract"
3224 ocv_filter_deps="libopencv"
3225 owdenoise_filter_deps="gpl"
3226 pan_filter_deps="swresample"
3227 perspective_filter_deps="gpl"
3228 phase_filter_deps="gpl"
3229 pp7_filter_deps="gpl"
3230 pp_filter_deps="gpl postproc"
3231 pullup_filter_deps="gpl"
3232 removelogo_filter_deps="avcodec avformat swscale"
3233 repeatfields_filter_deps="gpl"
3234 resample_filter_deps="avresample"
3235 rubberband_filter_deps="librubberband"
3236 sab_filter_deps="gpl swscale"
3237 scale2ref_filter_deps="swscale"
3238 scale_filter_deps="swscale"
3239 scale_qsv_filter_deps="libmfx"
3240 select_filter_select="pixelutils"
3241 showcqt_filter_deps="avcodec avformat swscale"
3242 showcqt_filter_select="fft"
3243 showfreqs_filter_deps="avcodec"
3244 showfreqs_filter_select="fft"
3245 showspectrum_filter_deps="avcodec"
3246 showspectrum_filter_select="fft"
3247 showspectrumpic_filter_deps="avcodec"
3248 showspectrumpic_filter_select="fft"
3249 signature_filter_deps="gpl avcodec avformat"
3250 smartblur_filter_deps="gpl swscale"
3251 sofalizer_filter_deps="libmysofa avcodec"
3252 sofalizer_filter_select="fft"
3253 spectrumsynth_filter_deps="avcodec"
3254 spectrumsynth_filter_select="fft"
3255 spp_filter_deps="gpl avcodec"
3256 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
3257 stereo3d_filter_deps="gpl"
3258 subtitles_filter_deps="avformat avcodec libass"
3259 super2xsai_filter_deps="gpl"
3260 pixfmts_super2xsai_test_deps="super2xsai_filter"
3261 tinterlace_filter_deps="gpl"
3262 tinterlace_merge_test_deps="tinterlace_filter"
3263 tinterlace_pad_test_deps="tinterlace_filter"
3264 tonemap_filter_deps="const_nan"
3265 uspp_filter_deps="gpl avcodec"
3266 vaguedenoiser_filter_deps="gpl"
3267 vidstabdetect_filter_deps="libvidstab"
3268 vidstabtransform_filter_deps="libvidstab"
3269 libvmaf_filter_deps="libvmaf"
3270 zmq_filter_deps="libzmq"
3271 zoompan_filter_deps="swscale"
3272 zscale_filter_deps="libzimg const_nan"
3273 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
3274
3275 # examples
3276 avio_dir_cmd_deps="avformat avutil"
3277 avio_reading_deps="avformat avcodec avutil"
3278 decode_audio_example_deps="avcodec avutil"
3279 decode_video_example_deps="avcodec avutil"
3280 demuxing_decoding_example_deps="avcodec avformat avutil"
3281 encode_audio_example_deps="avcodec avutil"
3282 encode_video_example_deps="avcodec avutil"
3283 extract_mvs_example_deps="avcodec avformat avutil"
3284 filter_audio_example_deps="avfilter avutil"
3285 filtering_audio_example_deps="avfilter avcodec avformat avutil"
3286 filtering_video_example_deps="avfilter avcodec avformat avutil"
3287 http_multiclient_example_deps="avformat avutil fork"
3288 hw_decode_example_deps="avcodec avformat avutil"
3289 metadata_example_deps="avformat avutil"
3290 muxing_example_deps="avcodec avformat avutil swscale"
3291 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
3292 remuxing_example_deps="avcodec avformat avutil"
3293 resampling_audio_example_deps="avutil swresample"
3294 scaling_video_example_deps="avutil swscale"
3295 transcode_aac_example_deps="avcodec avformat swresample"
3296 transcoding_example_deps="avfilter avcodec avformat avutil"
3297
3298 # libraries, in linking order
3299 avcodec_deps="avutil"
3300 avcodec_select="null_bsf"
3301 avdevice_deps="avformat avcodec avutil"
3302 avfilter_deps="avutil"
3303 avformat_deps="avcodec avutil"
3304 avformat_suggest="network"
3305 avresample_deps="avutil"
3306 postproc_deps="avutil gpl"
3307 swresample_deps="avutil"
3308 swscale_deps="avutil"
3309
3310 # programs
3311 ffmpeg_deps="avcodec avfilter avformat swresample"
3312 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
3313                null_filter
3314                trim_filter"
3315 ffplay_deps="avcodec avformat swscale swresample sdl2"
3316 ffplay_extralibs='$sdl2_extralibs'
3317 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
3318 ffprobe_deps="avcodec avformat"
3319 ffserver_deps="avformat fork sarestart"
3320 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
3321
3322 # documentation
3323 podpages_deps="perl"
3324 manpages_deps="perl pod2man"
3325 htmlpages_deps="perl"
3326 htmlpages_deps_any="makeinfo_html texi2html"
3327 txtpages_deps="perl makeinfo"
3328 doc_deps_any="manpages htmlpages podpages txtpages"
3329
3330 # default parameters
3331
3332 logfile="ffbuild/config.log"
3333
3334 # installation paths
3335 prefix_default="/usr/local"
3336 bindir_default='${prefix}/bin'
3337 datadir_default='${prefix}/share/ffmpeg'
3338 docdir_default='${prefix}/share/doc/ffmpeg'
3339 incdir_default='${prefix}/include'
3340 libdir_default='${prefix}/lib'
3341 mandir_default='${prefix}/share/man'
3342
3343 # toolchain
3344 ar_default="ar"
3345 cc_default="gcc"
3346 cxx_default="g++"
3347 host_cc_default="gcc"
3348 doxygen_default="doxygen"
3349 install="install"
3350 ln_s_default="ln -s -f"
3351 nm_default="nm -g"
3352 pkg_config_default=pkg-config
3353 ranlib_default="ranlib"
3354 strip_default="strip"
3355 version_script='--version-script'
3356 x86asmexe_default="nasm"
3357 windres_default="windres"
3358 nvcc_default="nvcc"
3359 nvccflags_default="-gencode arch=compute_30,code=sm_30 -O2"
3360
3361 # OS
3362 target_os_default=$(tolower $(uname -s))
3363 host_os=$target_os_default
3364
3365 # machine
3366 if test "$target_os_default" = aix; then
3367     arch_default=$(uname -p)
3368     strip_default="strip -X32_64"
3369 else
3370     arch_default=$(uname -m)
3371 fi
3372 cpu="generic"
3373 intrinsics="none"
3374
3375 # configurable options
3376 enable $PROGRAM_LIST
3377 enable $DOCUMENT_LIST
3378 enable $EXAMPLE_LIST
3379 enable $(filter_out avresample $LIBRARY_LIST)
3380 enable stripping
3381
3382 enable asm
3383 enable debug
3384 enable doc
3385 enable faan faandct faanidct
3386 enable optimizations
3387 enable runtime_cpudetect
3388 enable safe_bitstream_reader
3389 enable static
3390 enable swscale_alpha
3391 enable valgrind_backtrace
3392
3393 sws_max_filter_size_default=256
3394 set_default sws_max_filter_size
3395
3396 # build settings
3397 SHFLAGS='-shared -Wl,-soname,$$(@F)'
3398 LIBPREF="lib"
3399 LIBSUF=".a"
3400 FULLNAME='$(NAME)$(BUILDSUF)'
3401 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
3402 SLIBPREF="lib"
3403 SLIBSUF=".so"
3404 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
3405 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
3406 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
3407 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
3408 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
3409 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
3410 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
3411
3412 asflags_filter=echo
3413 cflags_filter=echo
3414 ldflags_filter=echo
3415
3416 AS_C='-c'
3417 AS_O='-o $@'
3418 CC_C='-c'
3419 CC_E='-E -o $@'
3420 CC_O='-o $@'
3421 CXX_C='-c'
3422 CXX_O='-o $@'
3423 OBJCC_C='-c'
3424 OBJCC_E='-E -o $@'
3425 OBJCC_O='-o $@'
3426 X86ASM_O='-o $@'
3427 LD_O='-o $@'
3428 LD_LIB='-l%'
3429 LD_PATH='-L'
3430 HOSTCC_C='-c'
3431 HOSTCC_E='-E -o $@'
3432 HOSTCC_O='-o $@'
3433 HOSTLD_O='-o $@'
3434 NVCC_C='-c'
3435 NVCC_O='-o $@'
3436
3437 host_extralibs='-lm'
3438 host_cflags_filter=echo
3439 host_ldflags_filter=echo
3440
3441 target_path='$(CURDIR)'
3442
3443 # since the object filename is not given with the -MM flag, the compiler
3444 # is only able to print the basename, and we must add the path ourselves
3445 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(@F),$(@D)/$(@F)," > $(@:.o=.d)'
3446 DEPFLAGS='-MM'
3447
3448 mkdir -p ffbuild
3449
3450 # find source path
3451 if test -f configure; then
3452     source_path=.
3453 else
3454     source_path=$(cd $(dirname "$0"); pwd)
3455     case "$source_path" in
3456         *[[:blank:]]*) die "Out of tree builds are impossible with whitespace in source path." ;;
3457     esac
3458     test -e "$source_path/config.h" &&
3459         die "Out of tree builds are impossible with config.h in source dir."
3460 fi
3461
3462 for v in "$@"; do
3463     r=${v#*=}
3464     l=${v%"$r"}
3465     r=$(sh_quote "$r")
3466     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
3467 done
3468
3469 find_things(){
3470     thing=$1
3471     pattern=$2
3472     file=$source_path/$3
3473     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
3474 }
3475
3476 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
3477 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
3478 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
3479 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
3480 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
3481 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
3482 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
3483 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
3484 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
3485
3486 find_things_extern(){
3487     thing=$1
3488     pattern=$2
3489     file=$source_path/$3
3490     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
3491 }
3492
3493 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
3494 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
3495
3496 ALL_COMPONENTS="
3497     $BSF_LIST
3498     $DECODER_LIST
3499     $DEMUXER_LIST
3500     $ENCODER_LIST
3501     $FILTER_LIST
3502     $HWACCEL_LIST
3503     $INDEV_LIST
3504     $MUXER_LIST
3505     $OUTDEV_LIST
3506     $PARSER_LIST
3507     $PROTOCOL_LIST
3508 "
3509
3510 for n in $COMPONENT_LIST; do
3511     v=$(toupper ${n%s})_LIST
3512     eval enable \$$v
3513     eval ${n}_if_any="\$$v"
3514 done
3515
3516 enable $ARCH_EXT_LIST
3517
3518 die_unknown(){
3519     echo "Unknown option \"$1\"."
3520     echo "See $0 --help for available options."
3521     exit 1
3522 }
3523
3524 print_in_columns() {
3525     cols=$(expr $ncols / 24)
3526     cat | tr ' ' '\n' | sort | pr -r "-$cols" -w $ncols -t
3527 }
3528
3529 show_list() {
3530     suffix=_$1
3531     shift
3532     echo $* | sed s/$suffix//g | print_in_columns
3533     exit 0
3534 }
3535
3536 rand_list(){
3537     IFS=', '
3538     set -- $*
3539     unset IFS
3540     for thing; do
3541         comp=${thing%:*}
3542         prob=${thing#$comp}
3543         prob=${prob#:}
3544         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
3545         echo "prob ${prob:-0.5}"
3546         printf '%s\n' $comp
3547     done
3548 }
3549
3550 do_random(){
3551     action=$1
3552     shift
3553     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
3554     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
3555 }
3556
3557 for opt do
3558     optval="${opt#*=}"
3559     case "$opt" in
3560         --extra-ldflags=*)
3561             add_ldflags $optval
3562         ;;
3563         --extra-ldexeflags=*)
3564             add_ldexeflags $optval
3565         ;;
3566         --extra-ldlibflags=*)
3567             add_ldlibflags $optval
3568         ;;
3569         --extra-libs=*)
3570             add_extralibs $optval
3571         ;;
3572         --disable-devices)
3573             disable $INDEV_LIST $OUTDEV_LIST
3574         ;;
3575         --enable-debug=*)
3576             debuglevel="$optval"
3577         ;;
3578         --disable-programs)
3579             disable $PROGRAM_LIST
3580         ;;
3581         --disable-everything)
3582             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3583         ;;
3584         --disable-all)
3585             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3586             disable $LIBRARY_LIST $PROGRAM_LIST doc
3587             enable avutil
3588         ;;
3589         --enable-random|--disable-random)
3590             action=${opt%%-random}
3591             do_random ${action#--} $COMPONENT_LIST
3592         ;;
3593         --enable-random=*|--disable-random=*)
3594             action=${opt%%-random=*}
3595             do_random ${action#--} $optval
3596         ;;
3597         --enable-sdl)
3598             enable sdl2
3599         ;;
3600         --enable-*=*|--disable-*=*)
3601             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
3602             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
3603             eval list=\$$(toupper $thing)_LIST
3604             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
3605             list=$(filter "$name" $list)
3606             [ "$list" = "" ] && warn "Option $opt did not match anything"
3607             $action $list
3608         ;;
3609         --enable-yasm|--disable-yasm)
3610             warn "The ${opt} option is only provided for compatibility and will be\n"\
3611                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
3612             test $opt = --enable-yasm && x86asm=yes || x86asm=no
3613         ;;
3614         --yasmexe=*)
3615             warn "The --yasmexe option is only provided for compatibility and will be\n"\
3616                  "removed in the future. Use --x86asmexe instead."
3617             x86asmexe="$optval"
3618         ;;
3619         --enable-?*|--disable-?*)
3620             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
3621             if is_in $option $COMPONENT_LIST; then
3622                 test $action = disable && action=unset
3623                 eval $action \$$(toupper ${option%s})_LIST
3624             elif is_in $option $CMDLINE_SELECT; then
3625                 $action $option
3626             else
3627                 die_unknown $opt
3628             fi
3629         ;;
3630         --list-*)
3631             NAME="${opt#--list-}"
3632             is_in $NAME $COMPONENT_LIST || die_unknown $opt
3633             NAME=${NAME%s}
3634             eval show_list $NAME \$$(toupper $NAME)_LIST
3635         ;;
3636         --help|-h) show_help
3637         ;;
3638         --quiet|-q) quiet=yes
3639         ;;
3640         --fatal-warnings) enable fatal_warnings
3641         ;;
3642         --libfuzzer=*)
3643             libfuzzer_path="$optval"
3644         ;;
3645         *)
3646             optname="${opt%%=*}"
3647             optname="${optname#--}"
3648             optname=$(echo "$optname" | sed 's/-/_/g')
3649             if is_in $optname $CMDLINE_SET; then
3650                 eval $optname='$optval'
3651             elif is_in $optname $CMDLINE_APPEND; then
3652                 append $optname "$optval"
3653             else
3654                 die_unknown $opt
3655             fi
3656         ;;
3657     esac
3658 done
3659
3660 for e in $env; do
3661     eval "export $e"
3662 done
3663
3664 if disabled autodetect; then
3665
3666     # Unless iconv is explicitely disabled by the user, we still want to probe
3667     # for the iconv from the libc.
3668     disabled iconv || enable libc_iconv
3669
3670     disable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
3671     disable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
3672 fi
3673 # Mark specifically enabled, but normally autodetected libraries as requested.
3674 for lib in $AUTODETECT_LIBS; do
3675     enabled $lib && request $lib
3676 done
3677 #TODO: switch to $AUTODETECT_LIBS when $THREADS_LIST is supported the same way
3678 enable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
3679 enable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
3680
3681 disabled logging && logfile=/dev/null
3682
3683 die_license_disabled() {
3684     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
3685 }
3686
3687 die_license_disabled_gpl() {
3688     enabled $1 || { enabled $v && die "$v is incompatible with the gpl and --enable-$1 is not specified."; }
3689 }
3690
3691 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
3692 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
3693
3694 enabled gpl && map "die_license_disabled_gpl nonfree" $EXTERNAL_LIBRARY_NONFREE_LIST
3695 map "die_license_disabled nonfree" $HWACCEL_LIBRARY_NONFREE_LIST
3696
3697 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3698
3699 # Disable all the library-specific components if the library itself
3700 # is disabled, see AVCODEC_LIST and following _LIST variables.
3701
3702 disable_components(){
3703     disabled ${1} && disable $(
3704         eval components="\$$(toupper ${1})_COMPONENTS"
3705         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
3706     )
3707 }
3708
3709 map 'disable_components $v' $LIBRARY_LIST
3710
3711 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
3712 set >> $logfile
3713
3714 test -n "$valgrind" && toolchain="valgrind-memcheck"
3715
3716 enabled ossfuzz && {
3717     add_cflags  -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp -fno-omit-frame-pointer
3718     add_ldflags -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp
3719 }
3720
3721 case "$toolchain" in
3722     *-asan)
3723         cc_default="${toolchain%-asan}"
3724         add_cflags  -fsanitize=address
3725         add_ldflags -fsanitize=address
3726     ;;
3727     *-msan)
3728         cc_default="${toolchain%-msan}"
3729         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
3730         add_ldflags -fsanitize=memory
3731     ;;
3732     *-tsan)
3733         cc_default="${toolchain%-tsan}"
3734         add_cflags  -fsanitize=thread -fPIE
3735         add_ldflags -fsanitize=thread -pie
3736         case "$toolchain" in
3737             gcc-tsan)
3738                 add_cflags  -fPIC
3739                 add_ldflags -fPIC
3740                 ;;
3741         esac
3742     ;;
3743     *-usan)
3744         cc_default="${toolchain%-usan}"
3745         add_cflags  -fsanitize=undefined
3746         add_ldflags -fsanitize=undefined
3747     ;;
3748     valgrind-*)
3749         target_exec_default="valgrind"
3750         case "$toolchain" in
3751             valgrind-massif)
3752                 target_exec_args="--tool=massif --alloc-fn=av_malloc --alloc-fn=av_mallocz --alloc-fn=av_calloc --alloc-fn=av_fast_padded_malloc --alloc-fn=av_fast_malloc --alloc-fn=av_realloc_f --alloc-fn=av_fast_realloc --alloc-fn=av_realloc"
3753                 ;;
3754             valgrind-memcheck)
3755                 target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3756                 ;;
3757         esac
3758     ;;
3759     msvc)
3760         # Check whether the current MSVC version needs the C99 converter.
3761         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3762         # support enough of C99 to build ffmpeg. Default to the new
3763         # behaviour if the regexp was unable to match anything, since this
3764         # successfully parses the version number of existing supported
3765         # versions that require the converter (MSVC 2010 and 2012).
3766         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3767         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3768             cc_default="cl"
3769             cxx_default="cl"
3770         else
3771             cc_default="c99wrap cl"
3772             cxx_default="c99wrap cl"
3773         fi
3774         ld_default="$source_path/compat/windows/mslink"
3775         nm_default="dumpbin -symbols"
3776         ar_default="lib"
3777         case "$arch" in
3778         arm*)
3779             as_default="armasm"
3780             ;;
3781         esac
3782         target_os_default="win32"
3783         # Use a relative path for TMPDIR. This makes sure all the
3784         # ffconf temp files are written with a relative path, avoiding
3785         # issues with msys/win32 path conversion for MSVC parameters
3786         # such as -Fo<file> or -out:<file>.
3787         TMPDIR=.
3788     ;;
3789     icl)
3790         cc_default="icl"
3791         ld_default="xilink"
3792         nm_default="dumpbin -symbols"
3793         ar_default="xilib"
3794         target_os_default="win32"
3795         TMPDIR=.
3796     ;;
3797     gcov)
3798         add_cflags  -fprofile-arcs -ftest-coverage
3799         add_ldflags -fprofile-arcs -ftest-coverage
3800     ;;
3801     llvm-cov)
3802         add_cflags -fprofile-arcs -ftest-coverage
3803         add_ldflags --coverage
3804     ;;
3805     hardened)
3806         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3807         add_cflags   -fno-strict-overflow -fstack-protector-all
3808         add_ldflags  -Wl,-z,relro -Wl,-z,now
3809         add_cflags   -fPIE
3810         add_ldexeflags -fPIE -pie
3811     ;;
3812     ?*)
3813         die "Unknown toolchain $toolchain"
3814     ;;
3815 esac
3816
3817 test -n "$cross_prefix" && enable cross_compile
3818
3819 if enabled cross_compile; then
3820     test -n "$arch" && test -n "$target_os" ||
3821         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3822 fi
3823
3824 ar_default="${cross_prefix}${ar_default}"
3825 cc_default="${cross_prefix}${cc_default}"
3826 cxx_default="${cross_prefix}${cxx_default}"
3827 nm_default="${cross_prefix}${nm_default}"
3828 pkg_config_default="${cross_prefix}${pkg_config_default}"
3829 if ${cross_prefix}${ranlib_default} 2>&1 | grep -q "\-D "; then
3830     ranlib_default="${cross_prefix}${ranlib_default} -D"
3831 else
3832     ranlib_default="${cross_prefix}${ranlib_default}"
3833 fi
3834 strip_default="${cross_prefix}${strip_default}"
3835 windres_default="${cross_prefix}${windres_default}"
3836
3837 sysinclude_default="${sysroot}/usr/include"
3838
3839 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3840     target_exec target_os x86asmexe nvcc
3841 enabled cross_compile || host_cc_default=$cc
3842 set_default host_cc
3843
3844 pkg_config_fail_message=""
3845 if ! $pkg_config --version >/dev/null 2>&1; then
3846     warn "$pkg_config not found, library detection may fail."
3847     pkg_config=false
3848 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3849     pkg_config_fail_message="
3850 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3851 fi
3852
3853 if test $doxygen != $doxygen_default && \
3854   ! $doxygen --version >/dev/null 2>&1; then
3855     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3856 fi
3857
3858 exesuf() {
3859     case $1 in
3860         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3861     esac
3862 }
3863
3864 EXESUF=$(exesuf $target_os)
3865 HOSTEXESUF=$(exesuf $host_os)
3866
3867 # set temporary file name
3868 : ${TMPDIR:=$TEMPDIR}
3869 : ${TMPDIR:=$TMP}
3870 : ${TMPDIR:=/tmp}
3871
3872 if [ -n "$tempprefix" ] ; then
3873     mktemp(){
3874         tmpname="$tempprefix.${HOSTNAME}.${UID}"
3875         echo "$tmpname"
3876         mkdir "$tmpname"
3877     }
3878 elif ! check_cmd mktemp -u XXXXXX; then
3879     # simple replacement for missing mktemp
3880     # NOT SAFE FOR GENERAL USE
3881     mktemp(){
3882         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3883         echo "$tmpname"
3884         mkdir "$tmpname"
3885     }
3886 fi
3887
3888 FFTMPDIR=$(mktemp -d "${TMPDIR}/ffconf.XXXXXXXX" 2> /dev/null) ||
3889     die "Unable to create temporary directory in $TMPDIR."
3890
3891 tmpfile(){
3892     tmp="${FFTMPDIR}/test"$2
3893     (set -C; exec > $tmp) 2> /dev/null ||
3894         die "Unable to create temporary file in $FFTMPDIR."
3895     eval $1=$tmp
3896 }
3897
3898 trap 'rm -rf -- "$FFTMPDIR"' EXIT
3899 trap 'exit 2' INT
3900
3901 tmpfile TMPASM .asm
3902 tmpfile TMPC   .c
3903 tmpfile TMPCPP .cpp
3904 tmpfile TMPE   $EXESUF
3905 tmpfile TMPH   .h
3906 tmpfile TMPM   .m
3907 tmpfile TMPO   .o
3908 tmpfile TMPS   .S
3909 tmpfile TMPSH  .sh
3910 tmpfile TMPV   .ver
3911
3912 unset -f mktemp
3913
3914 chmod +x $TMPE
3915
3916 # make sure we can execute files in $TMPDIR
3917 cat > $TMPSH 2>> $logfile <<EOF
3918 #! /bin/sh
3919 EOF
3920 chmod +x $TMPSH >> $logfile 2>&1
3921 if ! $TMPSH >> $logfile 2>&1; then
3922     cat <<EOF
3923 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3924 variable to another directory and make sure that it is not mounted noexec.
3925 EOF
3926     die "Sanity test failed."
3927 fi
3928
3929 armasm_flags(){
3930     for flag; do
3931         case $flag in
3932             # Filter out MSVC cl.exe options from cflags that shouldn't
3933             # be passed to gas-preprocessor
3934             -M[TD]*)                                            ;;
3935             *)                  echo $flag                      ;;
3936         esac
3937    done
3938 }
3939
3940 ccc_flags(){
3941     for flag; do
3942         case $flag in
3943             -std=c99)           echo -c99                       ;;
3944             -mcpu=*)            echo -arch ${flag#*=}           ;;
3945             -mieee)             echo -ieee                      ;;
3946             -O*|-fast)          echo $flag                      ;;
3947             -fno-math-errno)    echo -assume nomath_errno       ;;
3948             -g)                 echo -g3                        ;;
3949             -Wall)              echo -msg_enable level2         ;;
3950             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3951             -Wl,*)              echo $flag                      ;;
3952             -f*|-W*)                                            ;;
3953             *)                  echo $flag                      ;;
3954         esac
3955    done
3956 }
3957
3958 cparser_flags(){
3959     for flag; do
3960         case $flag in
3961             -Wno-switch)             echo -Wno-switch-enum ;;
3962             -Wno-format-zero-length) ;;
3963             -Wdisabled-optimization) ;;
3964             -Wno-pointer-sign)       echo -Wno-other ;;
3965             *)                       echo $flag ;;
3966         esac
3967     done
3968 }
3969
3970 msvc_common_flags(){
3971     for flag; do
3972         case $flag in
3973             # In addition to specifying certain flags under the compiler
3974             # specific filters, they must be specified here as well or else the
3975             # generic catch all at the bottom will print the original flag.
3976             -Wall)                ;;
3977             -Wextra)              ;;
3978             -std=c99)             ;;
3979             # Common flags
3980             -fomit-frame-pointer) ;;
3981             -g)                   echo -Z7 ;;
3982             -fno-math-errno)      ;;
3983             -fno-common)          ;;
3984             -fno-signed-zeros)    ;;
3985             -fPIC)                ;;
3986             -mthumb)              ;;
3987             -march=*)             ;;
3988             -lz)                  echo zlib.lib ;;
3989             -lx264)               echo libx264.lib ;;
3990             -lstdc++)             ;;
3991             -l*)                  echo ${flag#-l}.lib ;;
3992             -LARGEADDRESSAWARE)   echo $flag ;;
3993             -L*)                  echo -libpath:${flag#-L} ;;
3994             *)                    echo $flag ;;
3995         esac
3996     done
3997 }
3998
3999 msvc_flags(){
4000     msvc_common_flags "$@"
4001     for flag; do
4002         case $flag in
4003             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
4004                                        -wd4554 ;;
4005             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
4006                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
4007                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
4008                                        -wd4307 \
4009                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
4010         esac
4011     done
4012 }
4013
4014 icl_flags(){
4015     msvc_common_flags "$@"
4016     for flag; do
4017         case $flag in
4018             # Despite what Intel's documentation says -Wall, which is supported
4019             # on Windows, does enable remarks so disable them here.
4020             -Wall)                echo $flag -Qdiag-disable:remark ;;
4021             -std=c99)             echo -Qstd=c99 ;;
4022             -flto)                echo -ipo ;;
4023         esac
4024     done
4025 }
4026
4027 icc_flags(){
4028     for flag; do
4029         case $flag in
4030             -flto)                echo -ipo ;;
4031             *)                    echo $flag ;;
4032         esac
4033     done
4034 }
4035
4036 pgi_flags(){
4037     for flag; do
4038         case $flag in
4039             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
4040             -fomit-frame-pointer) echo -Mnoframe ;;
4041             -g)                   echo -gopt ;;
4042             *)                    echo $flag ;;
4043         esac
4044     done
4045 }
4046
4047 suncc_flags(){
4048     for flag; do
4049         case $flag in
4050             -march=*|-mcpu=*)
4051                 case "${flag#*=}" in
4052                     native)                   echo -xtarget=native       ;;
4053                     v9|niagara)               echo -xarch=sparc          ;;
4054                     ultrasparc)               echo -xarch=sparcvis       ;;
4055                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
4056                     i586|pentium)             echo -xchip=pentium        ;;
4057                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
4058                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
4059                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
4060                     pentium4*)          echo -xtarget=pentium4           ;;
4061                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
4062                     *-sse3)             echo -xarch=sse3                 ;;
4063                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
4064                     bonnell)                   echo -xarch=ssse3         ;;
4065                     corei7|nehalem)            echo -xtarget=nehalem     ;;
4066                     westmere)                  echo -xtarget=westmere    ;;
4067                     silvermont)                echo -xarch=sse4_2        ;;
4068                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
4069                     core-avx*|ivybridge|haswell|broadwell|skylake*|knl)
4070                                                echo -xarch=avx           ;;
4071                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
4072                     btver1)                    echo -xarch=amdsse4a      ;;
4073                     btver2|bdver*|znver*)      echo -xarch=avx           ;;
4074                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
4075                     k8|opteron|athlon64|athlon-fx)
4076                                                echo -xarch=sse2a         ;;
4077                     athlon*)                   echo -xarch=pentium_proa  ;;
4078                 esac
4079                 ;;
4080             -std=c99)             echo -xc99              ;;
4081             -fomit-frame-pointer) echo -xregs=frameptr    ;;
4082             -fPIC)                echo -KPIC -xcode=pic32 ;;
4083             -W*,*)                echo $flag              ;;
4084             -f*-*|-W*|-mimpure-text)                      ;;
4085             -shared)              echo -G                 ;;
4086             *)                    echo $flag              ;;
4087         esac
4088     done
4089 }
4090
4091 tms470_flags(){
4092     for flag; do
4093         case $flag in
4094             -march=*|-mcpu=*)
4095                 case "${flag#*=}" in
4096                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
4097                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
4098                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
4099                     armv6*|arm11*)          echo -mv=6   ;;
4100                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
4101                                             echo -mv=5e  ;;
4102                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
4103                 esac
4104                 ;;
4105             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
4106             -mfpu=vfp)      echo --float_support=vfpv2        ;;
4107             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
4108             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
4109             -msoft-float)   echo --float_support=vfplib       ;;
4110             -O[0-3]|-mf=*)  echo $flag                        ;;
4111             -g)             echo -g -mn                       ;;
4112             -pds=*)         echo $flag                        ;;
4113             -D*|-I*)        echo $flag                        ;;
4114             --gcc|--abi=*)  echo $flag                        ;;
4115             -me)            echo $flag                        ;;
4116         esac
4117     done
4118 }
4119
4120 probe_cc(){
4121     pfx=$1
4122     _cc=$2
4123     first=$3
4124
4125     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
4126     unset _ld_o _ldflags _ld_lib _ld_path
4127     unset _depflags _DEPCMD _DEPFLAGS
4128     _flags_filter=echo
4129
4130     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
4131         true # no-op to avoid reading stdin in following checks
4132     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
4133         _type=llvm_gcc
4134         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
4135         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
4136         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4137         _cflags_speed='-O3'
4138         _cflags_size='-Os'
4139     elif $_cc -v 2>&1 | grep -qi ^gcc; then
4140         _type=gcc
4141         gcc_version=$($_cc --version | head -n1)
4142         gcc_basever=$($_cc -dumpversion)
4143         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
4144         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
4145         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
4146         case $gcc_basever in
4147             2) ;;
4148             2.*) ;;
4149             *) _depflags='-MMD -MF $(@:.o=.d) -MT $@' ;;
4150         esac
4151         if [ "$first" = true ]; then
4152             case $gcc_basever in
4153                 4.2*)
4154                 warn "gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler." ;;
4155             esac
4156         fi
4157         _cflags_speed='-O3'
4158         _cflags_size='-Os'
4159     elif $_cc --version 2>/dev/null | grep -q ^icc; then
4160         _type=icc
4161         _ident=$($_cc --version | head -n1)
4162         _depflags='-MMD'
4163         _cflags_speed='-O3'
4164         _cflags_size='-Os'
4165         _cflags_noopt='-O1'
4166         _flags_filter=icc_flags
4167     elif $_cc -v 2>&1 | grep -q xlc; then
4168         _type=xlc
4169         _ident=$($_cc -qversion 2>/dev/null | head -n1)
4170         _cflags_speed='-O5'
4171         _cflags_size='-O5 -qcompact'
4172     elif $_cc -V 2>/dev/null | grep -q Compaq; then
4173         _type=ccc
4174         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
4175         _DEPFLAGS='-M'
4176         _cflags_speed='-fast'
4177         _cflags_size='-O1'
4178         _flags_filter=ccc_flags
4179     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
4180         test -d "$sysroot" || die "No valid sysroot specified."
4181         _type=armcc
4182         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
4183         armcc_conf="$PWD/armcc.conf"
4184         $_cc --arm_linux_configure                 \
4185              --arm_linux_config_file="$armcc_conf" \
4186              --configure_sysroot="$sysroot"        \
4187              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
4188              die "Error creating armcc configuration file."
4189         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
4190         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
4191         as_default="${cross_prefix}gcc"
4192         _depflags='-MMD'
4193         _cflags_speed='-O3'
4194         _cflags_size='-Os'
4195     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
4196         _type=tms470
4197         _ident=$($_cc -version | head -n1 | tr -s ' ')
4198         _flags='--gcc --abi=eabi -me'
4199         _cc_e='-ppl -fe=$@'
4200         _cc_o='-fe=$@'
4201         _depflags='-ppa -ppd=$(@:.o=.d)'
4202         _cflags_speed='-O3 -mf=5'
4203         _cflags_size='-O3 -mf=2'
4204         _flags_filter=tms470_flags
4205     elif $_cc -v 2>&1 | grep -q clang; then
4206         _type=clang
4207         _ident=$($_cc --version 2>/dev/null | head -n1)
4208         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4209         _cflags_speed='-O3'
4210         _cflags_size='-Oz'
4211     elif $_cc -V 2>&1 | grep -q Sun; then
4212         _type=suncc
4213         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
4214         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
4215         _DEPFLAGS='-xM1 -xc99'
4216         _ldflags='-std=c99'
4217         _cflags_speed='-O5'
4218         _cflags_size='-O5 -xspace'
4219         _flags_filter=suncc_flags
4220     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
4221         _type=pathscale
4222         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
4223         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4224         _cflags_speed='-O2'
4225         _cflags_size='-Os'
4226         _flags_filter='filter_out -Wdisabled-optimization'
4227     elif $_cc -v 2>&1 | grep -q Open64; then
4228         _type=open64
4229         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
4230         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4231         _cflags_speed='-O2'
4232         _cflags_size='-Os'
4233         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
4234     elif $_cc -V 2>&1 | grep -q Portland; then
4235         _type=pgi
4236         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
4237         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
4238         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
4239         _cflags_size="-O2 -Munroll=c:1 $opt_common"
4240         _cflags_noopt="-O"
4241         _flags_filter=pgi_flags
4242     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
4243         _type=armasm
4244         _ident=$($_cc | head -n1)
4245         # 4509: "This form of conditional instruction is deprecated"
4246         _flags="-nologo -ignore 4509"
4247         _flags_filter=armasm_flags
4248     elif $_cc 2>&1 | grep -q Intel; then
4249         _type=icl
4250         _ident=$($_cc 2>&1 | head -n1)
4251         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
4252         # Not only is O3 broken on 13.x+ but it is slower on all previous
4253         # versions (tested) as well.
4254         _cflags_speed="-O2"
4255         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
4256         if $_cc 2>&1 | grep -q Linker; then
4257             _ld_o='-out:$@'
4258         else
4259             _ld_o='-Fe$@'
4260         fi
4261         _cc_o='-Fo$@'
4262         _cc_e='-P'
4263         _flags_filter=icl_flags
4264         _ld_lib='lib%.a'
4265         _ld_path='-libpath:'
4266         # -Qdiag-error to make icl error when seeing certain unknown arguments
4267         _flags='-nologo -Qdiag-error:4044,10157'
4268         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
4269         # with MSVC which enables it by default.
4270         _cflags='-Qms0 -Qvec- -Qsimd- -GS -fp:precise'
4271         disable stripping
4272     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
4273         # lld can emulate multiple different linkers; in ms link.exe mode,
4274         # the -? parameter gives the help output which contains an identifyable
4275         # string, while it gives an error in other modes.
4276         _type=lld-link
4277         # The link.exe mode doesn't have a switch for getting the version,
4278         # but we can force it back to gnu mode and get the version from there.
4279         _ident=$($_cc -flavor gnu --version 2>/dev/null)
4280         _ld_o='-out:$@'
4281         _flags_filter=msvc_flags
4282         _ld_lib='lib%.a'
4283         _ld_path='-libpath:'
4284     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
4285         _type=msvc
4286         _ident=$($_cc 2>&1 | head -n1)
4287         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
4288         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
4289         _cflags_speed="-O2"
4290         _cflags_size="-O1"
4291         _cflags_noopt="-O1"
4292         if $_cc -nologo- 2>&1 | grep -q Linker; then
4293             _ld_o='-out:$@'
4294         else
4295             _ld_o='-Fe$@'
4296         fi
4297         _cc_o='-Fo$@'
4298         _cc_e='-P -Fi$@'
4299         _flags_filter=msvc_flags
4300         _ld_lib='lib%.a'
4301         _ld_path='-libpath:'
4302         _flags='-nologo'
4303         disable stripping
4304     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
4305         _type=cparser
4306         _ident=$($_cc --version | head -n1)
4307         _depflags='-MMD'
4308         _cflags_speed='-O4'
4309         _cflags_size='-O2'
4310         _flags_filter=cparser_flags
4311     fi
4312
4313     eval ${pfx}_type=\$_type
4314     eval ${pfx}_ident=\$_ident
4315 }
4316
4317 set_ccvars(){
4318     eval ${1}_C=\${_cc_c-\${${1}_C}}
4319     eval ${1}_E=\${_cc_e-\${${1}_E}}
4320     eval ${1}_O=\${_cc_o-\${${1}_O}}
4321
4322     if [ -n "$_depflags" ]; then
4323         eval ${1}_DEPFLAGS=\$_depflags
4324     else
4325         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
4326         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
4327         eval DEP${1}FLAGS=\$_flags
4328     fi
4329 }
4330
4331 probe_cc cc "$cc" "true"
4332 cflags_filter=$_flags_filter
4333 cflags_speed=$_cflags_speed
4334 cflags_size=$_cflags_size
4335 cflags_noopt=$_cflags_noopt
4336 add_cflags $_flags $_cflags
4337 cc_ldflags=$_ldflags
4338 set_ccvars CC
4339 set_ccvars CXX
4340
4341 probe_cc hostcc "$host_cc"
4342 host_cflags_filter=$_flags_filter
4343 host_cflags_speed=$_cflags_speed
4344 add_host_cflags  $_flags $_cflags
4345 set_ccvars HOSTCC
4346
4347 test -n "$cc_type" && enable $cc_type ||
4348     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
4349
4350 : ${as_default:=$cc}
4351 : ${objcc_default:=$cc}
4352 : ${dep_cc_default:=$cc}
4353 : ${ld_default:=$cc}
4354 : ${host_ld_default:=$host_cc}
4355 set_default ar as objcc dep_cc ld ln_s host_ld windres
4356
4357 probe_cc as "$as"
4358 asflags_filter=$_flags_filter
4359 add_asflags $_flags $_cflags
4360 set_ccvars AS
4361
4362 probe_cc objcc "$objcc"
4363 objcflags_filter=$_flags_filter
4364 add_objcflags $_flags $_cflags
4365 set_ccvars OBJC
4366
4367 probe_cc ld "$ld"
4368 ldflags_filter=$_flags_filter
4369 add_ldflags $_flags $_ldflags
4370 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
4371 LD_O=${_ld_o-$LD_O}
4372 LD_LIB=${_ld_lib-$LD_LIB}
4373 LD_PATH=${_ld_path-$LD_PATH}
4374
4375 probe_cc hostld "$host_ld"
4376 host_ldflags_filter=$_flags_filter
4377 add_host_ldflags $_flags $_ldflags
4378 HOSTLD_O=${_ld_o-$HOSTLD_O}
4379
4380 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
4381     probe_cc depcc "$dep_cc"
4382     CCDEP=${_DEPCMD:-$DEPCMD}
4383     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
4384     DEPCCFLAGS=$_flags
4385 fi
4386
4387 if $ar 2>&1 | grep -q Microsoft; then
4388     arflags="-nologo"
4389     ar_o='-out:$@'
4390 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
4391     arflags="rq"
4392     ar_o='$@'
4393 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
4394     arflags='-Xany -r -c'
4395     ar_o='$@'
4396 elif $ar 2>&1 | grep -q "\[D\] "; then
4397     arflags="rcD"
4398     ar_o='$@'
4399 else
4400     arflags="rc"
4401     ar_o='$@'
4402 fi
4403
4404 add_cflags $extra_cflags
4405 add_cxxflags $extra_cxxflags
4406 add_objcflags $extra_objcflags
4407 add_asflags $extra_cflags
4408
4409 if test -n "$sysroot"; then
4410     case "$cc_type" in
4411         gcc|llvm_gcc|clang)
4412             add_cppflags --sysroot="$sysroot"
4413             add_ldflags --sysroot="$sysroot"
4414 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
4415             add_cppflags -isysroot "$sysroot"
4416             add_ldflags -isysroot "$sysroot"
4417         ;;
4418         tms470)
4419             add_cppflags -I"$sysinclude"
4420             add_ldflags  --sysroot="$sysroot"
4421         ;;
4422     esac
4423 fi
4424
4425 if test "$cpu" = host; then
4426     enabled cross_compile &&
4427         die "--cpu=host makes no sense when cross-compiling."
4428
4429     case "$cc_type" in
4430         gcc|llvm_gcc)
4431             check_native(){
4432                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4433                 sed -n "/cc1.*$1=/{
4434                             s/.*$1=\\([^ ]*\\).*/\\1/
4435                             p
4436                             q
4437                         }" $TMPE
4438             }
4439             cpu=$(check_native -march || check_native -mcpu)
4440         ;;
4441         clang)
4442             check_native(){
4443                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4444                 sed -n "/cc1.*-target-cpu /{
4445                             s/.*-target-cpu \\([^ ]*\\).*/\\1/
4446                             p
4447                             q
4448                         }" $TMPE
4449             }
4450             cpu=$(check_native -march)
4451         ;;
4452     esac
4453
4454     test "${cpu:-host}" = host &&
4455         die "--cpu=host not supported with compiler $cc"
4456 fi
4457
4458 # Deal with common $arch aliases
4459 case "$arch" in
4460     aarch64|arm64)
4461         arch="aarch64"
4462     ;;
4463     arm*|iPad*|iPhone*)
4464         arch="arm"
4465     ;;
4466     mips*|IP*)
4467         case "$arch" in
4468         *el)
4469             add_cppflags -EL
4470             add_ldflags -EL
4471         ;;
4472         *eb)
4473             add_cppflags -EB
4474             add_ldflags -EB
4475         ;;
4476         esac
4477         arch="mips"
4478     ;;
4479     parisc*|hppa*)
4480         arch="parisc"
4481     ;;
4482     "Power Macintosh"|ppc*|powerpc*)
4483         arch="ppc"
4484     ;;
4485     s390|s390x)
4486         arch="s390"
4487     ;;
4488     sh4|sh)
4489         arch="sh4"
4490     ;;
4491     sun4*|sparc*)
4492         arch="sparc"
4493     ;;
4494     tilegx|tile-gx)
4495         arch="tilegx"
4496     ;;
4497     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
4498         arch="x86"
4499     ;;
4500 esac
4501
4502 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
4503 enable $arch
4504
4505 # Add processor-specific flags
4506 if enabled aarch64; then
4507
4508     case $cpu in
4509         armv*)
4510             cpuflags="-march=$cpu"
4511         ;;
4512         *)
4513             cpuflags="-mcpu=$cpu"
4514         ;;
4515     esac
4516
4517 elif enabled alpha; then
4518
4519     cpuflags="-mcpu=$cpu"
4520
4521 elif enabled arm; then
4522
4523     check_arm_arch() {
4524         check_cpp_condition stddef.h \
4525             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
4526             $cpuflags
4527     }
4528
4529     probe_arm_arch() {
4530         if   check_arm_arch 4;        then echo armv4
4531         elif check_arm_arch 4T;       then echo armv4t
4532         elif check_arm_arch 5;        then echo armv5
4533         elif check_arm_arch 5E;       then echo armv5e
4534         elif check_arm_arch 5T;       then echo armv5t
4535         elif check_arm_arch 5TE;      then echo armv5te
4536         elif check_arm_arch 5TEJ;     then echo armv5te
4537         elif check_arm_arch 6;        then echo armv6
4538         elif check_arm_arch 6J;       then echo armv6j
4539         elif check_arm_arch 6K;       then echo armv6k
4540         elif check_arm_arch 6Z;       then echo armv6z
4541         elif check_arm_arch 6ZK;      then echo armv6zk
4542         elif check_arm_arch 6T2;      then echo armv6t2
4543         elif check_arm_arch 7;        then echo armv7
4544         elif check_arm_arch 7A  7_A;  then echo armv7-a
4545         elif check_arm_arch 7S;       then echo armv7-a
4546         elif check_arm_arch 7R  7_R;  then echo armv7-r
4547         elif check_arm_arch 7M  7_M;  then echo armv7-m
4548         elif check_arm_arch 7EM 7E_M; then echo armv7-m
4549         elif check_arm_arch 8A  8_A;  then echo armv8-a
4550         fi
4551     }
4552
4553     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
4554
4555     case $cpu in
4556         armv*)
4557             cpuflags="-march=$cpu"
4558             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
4559         ;;
4560         *)
4561             cpuflags="-mcpu=$cpu"
4562             case $cpu in
4563                 cortex-a*)                               subarch=armv7a  ;;
4564                 cortex-r*)                               subarch=armv7r  ;;
4565                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
4566                 arm11*)                                  subarch=armv6   ;;
4567                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
4568                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
4569                 *)                             subarch=$(probe_arm_arch) ;;
4570             esac
4571         ;;
4572     esac
4573
4574     case "$subarch" in
4575         armv5t*)    enable fast_clz                ;;
4576         armv[6-8]*)
4577             enable fast_clz
4578             disabled fast_unaligned || enable fast_unaligned
4579             ;;
4580     esac
4581
4582 elif enabled avr32; then
4583
4584     case $cpu in
4585         ap7[02]0[0-2])
4586             subarch="avr32_ap"
4587             cpuflags="-mpart=$cpu"
4588         ;;
4589         ap)
4590             subarch="avr32_ap"
4591             cpuflags="-march=$cpu"
4592         ;;
4593         uc3[ab]*)
4594             subarch="avr32_uc"
4595             cpuflags="-mcpu=$cpu"
4596         ;;
4597         uc)
4598             subarch="avr32_uc"
4599             cpuflags="-march=$cpu"
4600         ;;
4601     esac
4602
4603 elif enabled bfin; then
4604
4605     cpuflags="-mcpu=$cpu"
4606
4607 elif enabled mips; then
4608
4609     cpuflags="-march=$cpu"
4610
4611     if [ "$cpu" != "generic" ]; then
4612         disable mips32r2
4613         disable mips32r5
4614         disable mips64r2
4615         disable mips32r6
4616         disable mips64r6
4617         disable loongson2
4618         disable loongson3
4619
4620         case $cpu in
4621             24kc|24kf*|24kec|34kc|1004kc|24kef*|34kf*|1004kf*|74kc|74kf)
4622                 enable mips32r2
4623                 disable msa
4624             ;;
4625             p5600|i6400|p6600)
4626                 disable mipsdsp
4627                 disable mipsdspr2
4628             ;;
4629             loongson*)
4630                 enable loongson2
4631                 enable loongson3
4632                 enable local_aligned_8 local_aligned_16 local_aligned_32
4633                 enable simd_align_16
4634                 enable fast_64bit
4635                 enable fast_clz
4636                 enable fast_cmov
4637                 enable fast_unaligned
4638                 disable aligned_stack
4639                 disable mipsfpu
4640                 disable mipsdsp
4641                 disable mipsdspr2
4642                 case $cpu in
4643                     loongson3*)
4644                         cpuflags="-march=loongson3a -mhard-float -fno-expensive-optimizations"
4645                     ;;
4646                     loongson2e)
4647                         cpuflags="-march=loongson2e -mhard-float -fno-expensive-optimizations"
4648                     ;;
4649                     loongson2f)
4650                         cpuflags="-march=loongson2f -mhard-float -fno-expensive-optimizations"
4651                     ;;
4652                 esac
4653             ;;
4654             *)
4655                 # Unknown CPU. Disable everything.
4656                 warn "unknown CPU. Disabling all MIPS optimizations."
4657                 disable mipsfpu
4658                 disable mipsdsp
4659                 disable mipsdspr2
4660                 disable msa
4661                 disable mmi
4662             ;;
4663         esac
4664
4665         case $cpu in
4666             24kc)
4667                 disable mipsfpu
4668                 disable mipsdsp
4669                 disable mipsdspr2
4670             ;;
4671             24kf*)
4672                 disable mipsdsp
4673                 disable mipsdspr2
4674             ;;
4675             24kec|34kc|1004kc)
4676                 disable mipsfpu
4677                 disable mipsdspr2
4678             ;;
4679             24kef*|34kf*|1004kf*)
4680                 disable mipsdspr2
4681             ;;
4682             74kc)
4683                 disable mipsfpu
4684             ;;
4685             p5600)
4686                 enable mips32r5
4687                 check_cflags "-mtune=p5600" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops"
4688             ;;
4689             i6400)
4690                 enable mips64r6
4691                 check_cflags "-mtune=i6400 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4692             ;;
4693             p6600)
4694                 enable mips64r6
4695                 check_cflags "-mtune=p6600 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4696             ;;
4697         esac
4698     else
4699         # We do not disable anything. Is up to the user to disable the unwanted features.
4700         warn 'generic cpu selected'
4701     fi
4702
4703 elif enabled ppc; then
4704
4705     disable ldbrx
4706
4707     case $(tolower $cpu) in
4708         601|ppc601|powerpc601)
4709             cpuflags="-mcpu=601"
4710             disable altivec
4711         ;;
4712         603*|ppc603*|powerpc603*)
4713             cpuflags="-mcpu=603"
4714             disable altivec
4715         ;;
4716         604*|ppc604*|powerpc604*)
4717             cpuflags="-mcpu=604"
4718             disable altivec
4719         ;;
4720         g3|75*|ppc75*|powerpc75*)
4721             cpuflags="-mcpu=750"
4722             disable altivec
4723         ;;
4724         g4|745*|ppc745*|powerpc745*)
4725             cpuflags="-mcpu=7450"
4726             disable vsx
4727         ;;
4728         74*|ppc74*|powerpc74*)
4729             cpuflags="-mcpu=7400"
4730             disable vsx
4731         ;;
4732         g5|970|ppc970|powerpc970)
4733             cpuflags="-mcpu=970"
4734             disable vsx
4735         ;;
4736         power[3-6]*)
4737             cpuflags="-mcpu=$cpu"
4738             disable vsx
4739         ;;
4740         power[7-8]*)
4741             cpuflags="-mcpu=$cpu"
4742         ;;
4743         cell)
4744             cpuflags="-mcpu=cell"
4745             enable ldbrx
4746             disable vsx
4747         ;;
4748         e500mc)
4749             cpuflags="-mcpu=e500mc"
4750             disable altivec
4751         ;;
4752         e500v2)
4753             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
4754             disable altivec
4755             disable dcbzl
4756         ;;
4757         e500)
4758             cpuflags="-mcpu=8540 -mhard-float"
4759             disable altivec
4760             disable dcbzl
4761         ;;
4762     esac
4763
4764 elif enabled sparc; then
4765
4766     case $cpu in
4767         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
4768             cpuflags="-mcpu=$cpu"
4769         ;;
4770         ultrasparc*|niagara[234])
4771             cpuflags="-mcpu=$cpu"
4772         ;;
4773     esac
4774
4775 elif enabled x86; then
4776
4777     case $cpu in
4778         i[345]86|pentium)
4779             cpuflags="-march=$cpu"
4780             disable i686
4781             disable mmx
4782         ;;
4783         # targets that do NOT support nopl and conditional mov (cmov)
4784         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
4785             cpuflags="-march=$cpu"
4786             disable i686
4787         ;;
4788         # targets that do support nopl and conditional mov (cmov)
4789         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
4790         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|skylake*|knl\
4791         |amdfam10|barcelona|b[dt]ver*|znver*)
4792             cpuflags="-march=$cpu"
4793             enable i686
4794             enable fast_cmov
4795         ;;
4796         # targets that do support conditional mov but on which it's slow
4797         pentium4|pentium4m|prescott|nocona)
4798             cpuflags="-march=$cpu"
4799             enable i686
4800             disable fast_cmov
4801         ;;
4802     esac
4803
4804 fi
4805
4806 if [ "$cpu" != generic ]; then
4807     add_cflags  $cpuflags
4808     add_asflags $cpuflags
4809     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
4810 fi
4811
4812 # compiler sanity check
4813 check_exec <<EOF
4814 int main(void){ return 0; }
4815 EOF
4816 if test "$?" != 0; then
4817     echo "$cc is unable to create an executable file."
4818     if test -z "$cross_prefix" && ! enabled cross_compile ; then
4819         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
4820         echo "Only do this if you know what cross compiling means."
4821     fi
4822     die "C compiler test failed."
4823 fi
4824
4825 add_cppflags -D_ISOC99_SOURCE
4826 add_cxxflags -D__STDC_CONSTANT_MACROS
4827 check_cxxflags -std=c++11 || check_cxxflags -std=c++0x
4828
4829 # some compilers silently accept -std=c11, so we also need to check that the
4830 # version macro is defined properly
4831 check_cpp_condition ctype.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
4832     add_cflags -std=c11 ||
4833     check_cflags -std=c99
4834
4835 check_cppflags -D_FILE_OFFSET_BITS=64
4836 check_cppflags -D_LARGEFILE_SOURCE
4837
4838 add_host_cppflags -D_ISOC99_SOURCE
4839 check_host_cflags -std=c99
4840 check_host_cflags -Wall
4841 check_host_cflags $host_cflags_speed
4842
4843 check_64bit(){
4844     arch32=$1
4845     arch64=$2
4846     expr=$3
4847     check_code cc "" "int test[2*($expr) - 1]" &&
4848         subarch=$arch64 || subarch=$arch32
4849 }
4850
4851 case "$arch" in
4852     aarch64|alpha|ia64)
4853         spic=$shared
4854     ;;
4855     mips)
4856         check_64bit mips mips64 '_MIPS_SIM > 1'
4857         spic=$shared
4858     ;;
4859     parisc)
4860         check_64bit parisc parisc64 'sizeof(void *) > 4'
4861         spic=$shared
4862     ;;
4863     ppc)
4864         check_64bit ppc ppc64 'sizeof(void *) > 4'
4865         spic=$shared
4866     ;;
4867     s390)
4868         check_64bit s390 s390x 'sizeof(void *) > 4'
4869         spic=$shared
4870     ;;