Merge commit 'c546147db07d16a76c2fb698d2e8a3057f393475'
[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     test "$name" = "" && name=$pkg
1399     check_pkg_config "$@" || return 1
1400     add_cflags    $(get_safe "${pkg}_cflags")
1401     add_extralibs $(get_safe "${pkg}_extralibs")
1402 }
1403
1404 require_pkg_config(){
1405     use_pkg_config "$@" || die "ERROR: $pkg_version not found using pkg-config$pkg_config_fail_message"
1406 }
1407
1408 hostcc_e(){
1409     eval printf '%s\\n' $HOSTCC_E
1410 }
1411
1412 hostcc_o(){
1413     eval printf '%s\\n' $HOSTCC_O
1414 }
1415
1416 check_host_cc(){
1417     log check_host_cc "$@"
1418     cat > $TMPC
1419     log_file $TMPC
1420     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1421 }
1422
1423 check_host_cpp(){
1424     log check_host_cpp "$@"
1425     cat > $TMPC
1426     log_file $TMPC
1427     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1428 }
1429
1430 check_host_cppflags(){
1431     log check_host_cppflags "$@"
1432     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1433 #include <stdlib.h>
1434 EOF
1435 }
1436
1437 check_host_cflags(){
1438     log check_host_cflags "$@"
1439     set -- $($host_cflags_filter "$@")
1440     check_host_cc "$@" <<EOF && append host_cflags "$@"
1441 int x;
1442 EOF
1443 }
1444
1445 check_host_cpp_condition(){
1446     log check_host_cpp_condition "$@"
1447     header=$1
1448     condition=$2
1449     shift 2
1450     check_host_cpp "$@" <<EOF
1451 #include <$header>
1452 #if !($condition)
1453 #error "unsatisfied condition: $condition"
1454 #endif
1455 EOF
1456 }
1457
1458 cp_if_changed(){
1459     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1460     mkdir -p "$(dirname $2)"
1461     cp -f "$1" "$2"
1462 }
1463
1464 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1465 # system-dependent things.
1466
1467 AVCODEC_COMPONENTS="
1468     bsfs
1469     decoders
1470     encoders
1471     hwaccels
1472     parsers
1473 "
1474
1475 AVDEVICE_COMPONENTS="
1476     indevs
1477     outdevs
1478 "
1479
1480 AVFILTER_COMPONENTS="
1481     filters
1482 "
1483
1484 AVFORMAT_COMPONENTS="
1485     demuxers
1486     muxers
1487     protocols
1488 "
1489
1490 AVRESAMPLE_COMPONENTS=""
1491
1492 AVUTIL_COMPONENTS=""
1493
1494 COMPONENT_LIST="
1495     $AVCODEC_COMPONENTS
1496     $AVDEVICE_COMPONENTS
1497     $AVFILTER_COMPONENTS
1498     $AVFORMAT_COMPONENTS
1499     $AVRESAMPLE_COMPONENTS
1500     $AVUTIL_COMPONENTS
1501 "
1502
1503 EXAMPLE_LIST="
1504     avio_dir_cmd_example
1505     avio_reading_example
1506     decode_audio_example
1507     decode_video_example
1508     demuxing_decoding_example
1509     encode_audio_example
1510     encode_video_example
1511     extract_mvs_example
1512     filter_audio_example
1513     filtering_audio_example
1514     filtering_video_example
1515     http_multiclient_example
1516     hw_decode_example
1517     metadata_example
1518     muxing_example
1519     qsvdec_example
1520     remuxing_example
1521     resampling_audio_example
1522     scaling_video_example
1523     transcode_aac_example
1524     transcoding_example
1525 "
1526
1527 EXTERNAL_AUTODETECT_LIBRARY_LIST="
1528     alsa
1529     appkit
1530     avfoundation
1531     bzlib
1532     coreimage
1533     iconv
1534     jack
1535     libxcb
1536     libxcb_shm
1537     libxcb_shape
1538     libxcb_xfixes
1539     lzma
1540     schannel
1541     sdl2
1542     securetransport
1543     sndio
1544     xlib
1545     zlib
1546 "
1547
1548 EXTERNAL_LIBRARY_GPL_LIST="
1549     avisynth
1550     frei0r
1551     libcdio
1552     librubberband
1553     libvidstab
1554     libx264
1555     libx265
1556     libxavs
1557     libxvid
1558 "
1559
1560 EXTERNAL_LIBRARY_NONFREE_LIST="
1561     decklink
1562     libndi_newtek
1563     libfdk_aac
1564     openssl
1565 "
1566
1567 EXTERNAL_LIBRARY_VERSION3_LIST="
1568     gmp
1569     libopencore_amrnb
1570     libopencore_amrwb
1571     libvo_amrwbenc
1572     rkmpp
1573 "
1574
1575 EXTERNAL_LIBRARY_GPLV3_LIST="
1576     libsmbclient
1577 "
1578
1579 EXTERNAL_LIBRARY_LIST="
1580     $EXTERNAL_AUTODETECT_LIBRARY_LIST
1581     $EXTERNAL_LIBRARY_GPL_LIST
1582     $EXTERNAL_LIBRARY_NONFREE_LIST
1583     $EXTERNAL_LIBRARY_VERSION3_LIST
1584     $EXTERNAL_LIBRARY_GPLV3_LIST
1585     chromaprint
1586     gcrypt
1587     gnutls
1588     jni
1589     ladspa
1590     libass
1591     libbluray
1592     libbs2b
1593     libcaca
1594     libcelt
1595     libdc1394
1596     libdrm
1597     libflite
1598     libfontconfig
1599     libfreetype
1600     libfribidi
1601     libgme
1602     libgsm
1603     libiec61883
1604     libilbc
1605     libkvazaar
1606     libmodplug
1607     libmp3lame
1608     libmysofa
1609     libopencv
1610     libopenh264
1611     libopenjpeg
1612     libopenmpt
1613     libopus
1614     libpulse
1615     librsvg
1616     librtmp
1617     libshine
1618     libsmbclient
1619     libsnappy
1620     libsoxr
1621     libspeex
1622     libssh
1623     libtesseract
1624     libtheora
1625     libtwolame
1626     libv4l2
1627     libvmaf
1628     libvorbis
1629     libvpx
1630     libwavpack
1631     libwebp
1632     libxml2
1633     libzimg
1634     libzmq
1635     libzvbi
1636     mediacodec
1637     openal
1638     opencl
1639     opengl
1640 "
1641
1642 HWACCEL_AUTODETECT_LIBRARY_LIST="
1643     audiotoolbox
1644     crystalhd
1645     cuda
1646     cuvid
1647     d3d11va
1648     dxva2
1649     nvenc
1650     vaapi
1651     vda
1652     vdpau
1653     videotoolbox
1654     v4l2_m2m
1655     xvmc
1656 "
1657
1658 HWACCEL_LIBRARY_NONFREE_LIST="
1659     cuda_sdk
1660     libnpp
1661 "
1662
1663 HWACCEL_LIBRARY_LIST="
1664     $HWACCEL_AUTODETECT_LIBRARY_LIST
1665     $HWACCEL_LIBRARY_NONFREE_LIST
1666     libmfx
1667     mmal
1668     omx
1669 "
1670
1671 DOCUMENT_LIST="
1672     doc
1673     htmlpages
1674     manpages
1675     podpages
1676     txtpages
1677 "
1678
1679 FEATURE_LIST="
1680     ftrapv
1681     gray
1682     hardcoded_tables
1683     omx_rpi
1684     runtime_cpudetect
1685     safe_bitstream_reader
1686     shared
1687     small
1688     static
1689     swscale_alpha
1690 "
1691
1692 LIBRARY_LIST="
1693     avcodec
1694     avdevice
1695     avfilter
1696     avformat
1697     avresample
1698     avutil
1699     postproc
1700     swresample
1701     swscale
1702 "
1703
1704 LICENSE_LIST="
1705     gpl
1706     nonfree
1707     version3
1708 "
1709
1710 PROGRAM_LIST="
1711     ffplay
1712     ffprobe
1713     ffserver
1714     ffmpeg
1715 "
1716
1717 SUBSYSTEM_LIST="
1718     dct
1719     dwt
1720     error_resilience
1721     faan
1722     fast_unaligned
1723     fft
1724     lsp
1725     lzo
1726     mdct
1727     pixelutils
1728     network
1729     rdft
1730 "
1731
1732 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1733 CONFIG_LIST="
1734     $DOCUMENT_LIST
1735     $EXAMPLE_LIST
1736     $EXTERNAL_LIBRARY_LIST
1737     $HWACCEL_LIBRARY_LIST
1738     $FEATURE_LIST
1739     $LICENSE_LIST
1740     $LIBRARY_LIST
1741     $PROGRAM_LIST
1742     $SUBSYSTEM_LIST
1743     autodetect
1744     fontconfig
1745     linux_perf
1746     memory_poisoning
1747     neon_clobber_test
1748     ossfuzz
1749     pic
1750     thumb
1751     valgrind_backtrace
1752     xmm_clobber_test
1753     $COMPONENT_LIST
1754 "
1755
1756 THREADS_LIST="
1757     pthreads
1758     os2threads
1759     w32threads
1760 "
1761
1762 ATOMICS_LIST="
1763     atomics_gcc
1764     atomics_suncc
1765     atomics_win32
1766 "
1767
1768 AUTODETECT_LIBS="
1769     $EXTERNAL_AUTODETECT_LIBRARY_LIST
1770     $HWACCEL_AUTODETECT_LIBRARY_LIST
1771     $THREADS_LIST
1772 "
1773
1774 ARCH_LIST="
1775     aarch64
1776     alpha
1777     arm
1778     avr32
1779     avr32_ap
1780     avr32_uc
1781     bfin
1782     ia64
1783     m68k
1784     mips
1785     mips64
1786     parisc
1787     ppc
1788     ppc64
1789     s390
1790     sh4
1791     sparc
1792     sparc64
1793     tilegx
1794     tilepro
1795     tomi
1796     x86
1797     x86_32
1798     x86_64
1799 "
1800
1801 ARCH_EXT_LIST_ARM="
1802     armv5te
1803     armv6
1804     armv6t2
1805     armv8
1806     neon
1807     vfp
1808     vfpv3
1809     setend
1810 "
1811
1812 ARCH_EXT_LIST_MIPS="
1813     mipsfpu
1814     mips32r2
1815     mips32r5
1816     mips64r2
1817     mips32r6
1818     mips64r6
1819     mipsdsp
1820     mipsdspr2
1821     msa
1822 "
1823
1824 ARCH_EXT_LIST_LOONGSON="
1825     loongson2
1826     loongson3
1827     mmi
1828 "
1829
1830 ARCH_EXT_LIST_X86_SIMD="
1831     aesni
1832     amd3dnow
1833     amd3dnowext
1834     avx
1835     avx2
1836     fma3
1837     fma4
1838     mmx
1839     mmxext
1840     sse
1841     sse2
1842     sse3
1843     sse4
1844     sse42
1845     ssse3
1846     xop
1847 "
1848
1849 ARCH_EXT_LIST_PPC="
1850     altivec
1851     dcbzl
1852     ldbrx
1853     power8
1854     ppc4xx
1855     vsx
1856 "
1857
1858 ARCH_EXT_LIST_X86="
1859     $ARCH_EXT_LIST_X86_SIMD
1860     cpunop
1861     i686
1862 "
1863
1864 ARCH_EXT_LIST="
1865     $ARCH_EXT_LIST_ARM
1866     $ARCH_EXT_LIST_PPC
1867     $ARCH_EXT_LIST_X86
1868     $ARCH_EXT_LIST_MIPS
1869     $ARCH_EXT_LIST_LOONGSON
1870 "
1871
1872 ARCH_FEATURES="
1873     aligned_stack
1874     fast_64bit
1875     fast_clz
1876     fast_cmov
1877     local_aligned_8
1878     local_aligned_16
1879     local_aligned_32
1880     simd_align_16
1881     simd_align_32
1882 "
1883
1884 BUILTIN_LIST="
1885     atomic_cas_ptr
1886     machine_rw_barrier
1887     MemoryBarrier
1888     mm_empty
1889     rdtsc
1890     sarestart
1891     sem_timedwait
1892     sync_val_compare_and_swap
1893 "
1894 HAVE_LIST_CMDLINE="
1895     inline_asm
1896     symver
1897     x86asm
1898 "
1899
1900 HAVE_LIST_PUB="
1901     bigendian
1902     fast_unaligned
1903 "
1904
1905 HEADERS_LIST="
1906     altivec_h
1907     arpa_inet_h
1908     asm_types_h
1909     cdio_paranoia_h
1910     cdio_paranoia_paranoia_h
1911     cuda_h
1912     d3d11_h
1913     dispatch_dispatch_h
1914     dev_bktr_ioctl_bt848_h
1915     dev_bktr_ioctl_meteor_h
1916     dev_ic_bt8xx_h
1917     dev_video_bktr_ioctl_bt848_h
1918     dev_video_meteor_ioctl_meteor_h
1919     direct_h
1920     dirent_h
1921     dlfcn_h
1922     dxgidebug_h
1923     dxva_h
1924     ES2_gl_h
1925     gsm_h
1926     io_h
1927     mach_mach_time_h
1928     machine_ioctl_bt848_h
1929     machine_ioctl_meteor_h
1930     malloc_h
1931     opencv2_core_core_c_h
1932     openjpeg_2_2_openjpeg_h
1933     openjpeg_2_1_openjpeg_h
1934     openjpeg_2_0_openjpeg_h
1935     openjpeg_1_5_openjpeg_h
1936     OpenGL_gl3_h
1937     poll_h
1938     soundcard_h
1939     stdatomic_h
1940     sys_mman_h
1941     sys_param_h
1942     sys_resource_h
1943     sys_select_h
1944     sys_soundcard_h
1945     sys_time_h
1946     sys_un_h
1947     sys_videoio_h
1948     termios_h
1949     udplite_h
1950     unistd_h
1951     valgrind_valgrind_h
1952     windows_h
1953     winsock2_h
1954 "
1955
1956 INTRINSICS_LIST="
1957     intrinsics_neon
1958 "
1959
1960 COMPLEX_FUNCS="
1961     cabs
1962     cexp
1963 "
1964
1965 MATH_FUNCS="
1966     atanf
1967     atan2f
1968     cbrt
1969     cbrtf
1970     copysign
1971     cosf
1972     erf
1973     exp2
1974     exp2f
1975     expf
1976     hypot
1977     isfinite
1978     isinf
1979     isnan
1980     ldexpf
1981     llrint
1982     llrintf
1983     log2
1984     log2f
1985     log10f
1986     lrint
1987     lrintf
1988     powf
1989     rint
1990     round
1991     roundf
1992     sinf
1993     trunc
1994     truncf
1995 "
1996
1997 SYSTEM_FUNCS="
1998     access
1999     aligned_malloc
2000     arc4random
2001     clock_gettime
2002     closesocket
2003     CommandLineToArgvW
2004     CoTaskMemFree
2005     CryptGenRandom
2006     dlopen
2007     fcntl
2008     flt_lim
2009     fork
2010     getaddrinfo
2011     gethrtime
2012     getopt
2013     GetProcessAffinityMask
2014     GetProcessMemoryInfo
2015     GetProcessTimes
2016     getrusage
2017     GetSystemTimeAsFileTime
2018     gettimeofday
2019     glob
2020     glXGetProcAddress
2021     gmtime_r
2022     inet_aton
2023     isatty
2024     jack_port_get_latency_range
2025     kbhit
2026     LoadLibrary
2027     localtime_r
2028     lstat
2029     lzo1x_999_compress
2030     mach_absolute_time
2031     MapViewOfFile
2032     memalign
2033     mkstemp
2034     mmap
2035     mprotect
2036     nanosleep
2037     PeekNamedPipe
2038     posix_memalign
2039     pthread_cancel
2040     sched_getaffinity
2041     SetConsoleTextAttribute
2042     SetConsoleCtrlHandler
2043     setmode
2044     setrlimit
2045     Sleep
2046     strerror_r
2047     sysconf
2048     sysctl
2049     usleep
2050     UTGetOSTypeFromString
2051     VirtualAlloc
2052     wglGetProcAddress
2053 "
2054
2055 TOOLCHAIN_FEATURES="
2056     as_dn_directive
2057     as_fpu_directive
2058     as_func
2059     as_object_arch
2060     asm_mod_q
2061     attribute_may_alias
2062     attribute_packed
2063     blocks_extension
2064     ebp_available
2065     ebx_available
2066     gnu_as
2067     gnu_windres
2068     ibm_asm
2069     inline_asm_direct_symbol_refs
2070     inline_asm_labels
2071     inline_asm_nonlocal_labels
2072     pragma_deprecated
2073     rsync_contimeout
2074     symver_asm_label
2075     symver_gnu_asm
2076     vfp_args
2077     xform_asm
2078     xmm_clobbers
2079 "
2080
2081 TYPES_LIST="
2082     CONDITION_VARIABLE_Ptr
2083     socklen_t
2084     struct_addrinfo
2085     struct_group_source_req
2086     struct_ip_mreq_source
2087     struct_ipv6_mreq
2088     struct_msghdr_msg_flags
2089     struct_pollfd
2090     struct_rusage_ru_maxrss
2091     struct_sctp_event_subscribe
2092     struct_sockaddr_in6
2093     struct_sockaddr_sa_len
2094     struct_sockaddr_storage
2095     struct_stat_st_mtim_tv_nsec
2096     struct_v4l2_frmivalenum_discrete
2097 "
2098
2099 HAVE_LIST="
2100     $ARCH_EXT_LIST
2101     $(add_suffix _external $ARCH_EXT_LIST)
2102     $(add_suffix _inline   $ARCH_EXT_LIST)
2103     $ARCH_FEATURES
2104     $ATOMICS_LIST
2105     $BUILTIN_LIST
2106     $COMPLEX_FUNCS
2107     $HAVE_LIST_CMDLINE
2108     $HAVE_LIST_PUB
2109     $HEADERS_LIST
2110     $INTRINSICS_LIST
2111     $MATH_FUNCS
2112     $SYSTEM_FUNCS
2113     $THREADS_LIST
2114     $TOOLCHAIN_FEATURES
2115     $TYPES_LIST
2116     atomics_native
2117     dos_paths
2118     libc_msvcrt
2119     makeinfo
2120     makeinfo_html
2121     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
2122     perl
2123     pod2man
2124     section_data_rel_ro
2125     texi2html
2126     threads
2127     uwp
2128     vaapi_drm
2129     vaapi_x11
2130     vdpau_x11
2131     winrt
2132 "
2133
2134 # options emitted with CONFIG_ prefix but not available on the command line
2135 CONFIG_EXTRA="
2136     aandcttables
2137     ac3dsp
2138     audio_frame_queue
2139     audiodsp
2140     blockdsp
2141     bswapdsp
2142     cabac
2143     dirac_parse
2144     dvprofile
2145     exif
2146     faandct
2147     faanidct
2148     fdctdsp
2149     flacdsp
2150     fmtconvert
2151     frame_thread_encoder
2152     g722dsp
2153     golomb
2154     gplv3
2155     h263dsp
2156     h264chroma
2157     h264dsp
2158     h264parse
2159     h264pred
2160     h264qpel
2161     hevcparse
2162     hpeldsp
2163     huffman
2164     huffyuvdsp
2165     huffyuvencdsp
2166     idctdsp
2167     iirfilter
2168     mdct15
2169     intrax8
2170     iso_media
2171     ividsp
2172     jpegtables
2173     lgplv3
2174     libx262
2175     llauddsp
2176     llviddsp
2177     llvidencdsp
2178     lpc
2179     lzf
2180     me_cmp
2181     mpeg_er
2182     mpegaudio
2183     mpegaudiodsp
2184     mpegaudioheader
2185     mpegvideo
2186     mpegvideoenc
2187     mss34dsp
2188     pixblockdsp
2189     qpeldsp
2190     qsv
2191     qsvdec
2192     qsvenc
2193     rangecoder
2194     riffdec
2195     riffenc
2196     rtpdec
2197     rtpenc_chain
2198     rv34dsp
2199     sinewin
2200     snappy
2201     srtp
2202     startcode
2203     texturedsp
2204     texturedspenc
2205     tpeldsp
2206     vaapi_encode
2207     vc1dsp
2208     videodsp
2209     vp3dsp
2210     vp56dsp
2211     vp8dsp
2212     wma_freqs
2213     wmv2dsp
2214 "
2215
2216 CMDLINE_SELECT="
2217     $ARCH_EXT_LIST
2218     $CONFIG_LIST
2219     $HAVE_LIST_CMDLINE
2220     $THREADS_LIST
2221     asm
2222     cross_compile
2223     debug
2224     extra_warnings
2225     logging
2226     lto
2227     optimizations
2228     rpath
2229     stripping
2230 "
2231
2232 PATHS_LIST="
2233     bindir
2234     datadir
2235     docdir
2236     incdir
2237     libdir
2238     mandir
2239     pkgconfigdir
2240     prefix
2241     shlibdir
2242     install_name_dir
2243 "
2244
2245 CMDLINE_SET="
2246     $PATHS_LIST
2247     ar
2248     arch
2249     as
2250     assert_level
2251     build_suffix
2252     cc
2253     objcc
2254     cpu
2255     cross_prefix
2256     custom_allocator
2257     cxx
2258     dep_cc
2259     doxygen
2260     env
2261     extra_version
2262     gas
2263     host_cc
2264     host_cflags
2265     host_extralibs
2266     host_ld
2267     host_ldflags
2268     host_os
2269     ignore_tests
2270     install
2271     ld
2272     ln_s
2273     logfile
2274     malloc_prefix
2275     nm
2276     optflags
2277     nvccflags
2278     pkg_config
2279     pkg_config_flags
2280     progs_suffix
2281     random_seed
2282     ranlib
2283     samples
2284     strip
2285     sws_max_filter_size
2286     sysinclude
2287     sysroot
2288     target_exec
2289     target_os
2290     target_path
2291     target_samples
2292     tempprefix
2293     toolchain
2294     valgrind
2295     x86asmexe
2296 "
2297
2298 CMDLINE_APPEND="
2299     extra_cflags
2300     extra_cxxflags
2301     extra_objcflags
2302     host_cppflags
2303 "
2304
2305 # code dependency declarations
2306
2307 # architecture extensions
2308
2309 armv5te_deps="arm"
2310 armv6_deps="arm"
2311 armv6t2_deps="arm"
2312 armv8_deps="aarch64"
2313 neon_deps_any="aarch64 arm"
2314 intrinsics_neon_deps="neon"
2315 vfp_deps_any="aarch64 arm"
2316 vfpv3_deps="vfp"
2317 setend_deps="arm"
2318
2319 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
2320
2321 loongson2_deps="mips"
2322 loongson3_deps="mips"
2323 mipsfpu_deps="mips"
2324 mipsdsp_deps="mips"
2325 mipsdspr2_deps="mips"
2326 mips32r2_deps="mips"
2327 mips32r5_deps="mips"
2328 mips32r6_deps="mips"
2329 mips64r2_deps="mips"
2330 mips64r6_deps="mips"
2331 msa_deps="mipsfpu"
2332 mmi_deps="mips"
2333
2334 altivec_deps="ppc"
2335 dcbzl_deps="ppc"
2336 ldbrx_deps="ppc"
2337 ppc4xx_deps="ppc"
2338 vsx_deps="altivec"
2339 power8_deps="vsx"
2340
2341 cpunop_deps="i686"
2342 x86_64_select="i686"
2343 x86_64_suggest="fast_cmov"
2344
2345 amd3dnow_deps="mmx"
2346 amd3dnowext_deps="amd3dnow"
2347 i686_deps="x86"
2348 mmx_deps="x86"
2349 mmxext_deps="mmx"
2350 sse_deps="mmxext"
2351 sse2_deps="sse"
2352 sse3_deps="sse2"
2353 ssse3_deps="sse3"
2354 sse4_deps="ssse3"
2355 sse42_deps="sse4"
2356 aesni_deps="sse42"
2357 avx_deps="sse42"
2358 xop_deps="avx"
2359 fma3_deps="avx"
2360 fma4_deps="avx"
2361 avx2_deps="avx"
2362
2363 mmx_external_deps="x86asm"
2364 mmx_inline_deps="inline_asm"
2365 mmx_suggest="mmx_external mmx_inline"
2366
2367 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2368     eval dep=\$${ext}_deps
2369     eval ${ext}_external_deps='"${dep}_external"'
2370     eval ${ext}_inline_deps='"${dep}_inline"'
2371     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2372 done
2373
2374 aligned_stack_if_any="aarch64 ppc x86"
2375 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2376 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2377 fast_unaligned_if_any="aarch64 ppc x86"
2378 simd_align_16_if_any="altivec neon sse"
2379 simd_align_32_if_any="avx"
2380
2381 # system capabilities
2382 symver_if_any="symver_asm_label symver_gnu_asm"
2383 valgrind_backtrace_conflict="optimizations"
2384 valgrind_backtrace_deps="valgrind_valgrind_h"
2385
2386 # threading support
2387 atomics_gcc_if="sync_val_compare_and_swap"
2388 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2389 atomics_win32_if="MemoryBarrier"
2390 atomics_native_if_any="$ATOMICS_LIST"
2391 w32threads_deps="atomics_native"
2392 threads_if_any="$THREADS_LIST"
2393
2394 # subsystems
2395 dct_select="rdft"
2396 dirac_parse_select="golomb"
2397 error_resilience_select="me_cmp"
2398 faandct_deps="faan fdctdsp"
2399 faanidct_deps="faan idctdsp"
2400 h264dsp_select="startcode"
2401 hevcparse_select="golomb"
2402 frame_thread_encoder_deps="encoders threads"
2403 intrax8_select="blockdsp idctdsp"
2404 mdct_select="fft"
2405 mdct15_select="fft"
2406 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2407 mpeg_er_select="error_resilience"
2408 mpegaudio_select="mpegaudiodsp mpegaudioheader"
2409 mpegaudiodsp_select="dct"
2410 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp mpeg_er videodsp"
2411 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2412 vc1dsp_select="h264chroma qpeldsp startcode"
2413 rdft_select="fft"
2414
2415 # decoders / encoders
2416 aac_decoder_select="mdct15 mdct sinewin"
2417 aac_fixed_decoder_select="mdct sinewin"
2418 aac_encoder_select="audio_frame_queue iirfilter lpc mdct sinewin"
2419 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2420 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2421 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2422 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2423 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2424 adpcm_g722_decoder_select="g722dsp"
2425 adpcm_g722_encoder_select="g722dsp"
2426 aic_decoder_select="golomb idctdsp"
2427 alac_encoder_select="lpc"
2428 als_decoder_select="bswapdsp"
2429 amrnb_decoder_select="lsp"
2430 amrwb_decoder_select="lsp"
2431 amv_decoder_select="sp5x_decoder exif"
2432 amv_encoder_select="aandcttables jpegtables mpegvideoenc"
2433 ape_decoder_select="bswapdsp llauddsp"
2434 apng_decoder_select="zlib"
2435 apng_encoder_select="llvidencdsp zlib"
2436 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2437 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2438 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2439 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2440 atrac1_decoder_select="mdct sinewin"
2441 atrac3_decoder_select="mdct"
2442 atrac3p_decoder_select="mdct sinewin"
2443 avrn_decoder_select="exif jpegtables"
2444 bink_decoder_select="blockdsp hpeldsp"
2445 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2446 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2447 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2448 clearvideo_decoder_select="idctdsp"
2449 cllc_decoder_select="bswapdsp"
2450 comfortnoise_encoder_select="lpc"
2451 cook_decoder_select="audiodsp mdct sinewin"
2452 cscd_decoder_select="lzo"
2453 cscd_decoder_suggest="zlib"
2454 dca_decoder_select="mdct"
2455 dds_decoder_select="texturedsp"
2456 dirac_decoder_select="dirac_parse dwt golomb videodsp mpegvideoenc"
2457 dnxhd_decoder_select="blockdsp idctdsp"
2458 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2459 dolby_e_decoder_select="mdct"
2460 dvvideo_decoder_select="dvprofile idctdsp"
2461 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2462 dxa_decoder_select="zlib"
2463 dxv_decoder_select="lzf texturedsp"
2464 eac3_decoder_select="ac3_decoder"
2465 eac3_encoder_select="ac3_encoder"
2466 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2467 eatgq_decoder_select="aandcttables"
2468 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2469 exr_decoder_select="zlib"
2470 ffv1_decoder_select="rangecoder"
2471 ffv1_encoder_select="rangecoder"
2472 ffvhuff_decoder_select="huffyuv_decoder"
2473 ffvhuff_encoder_select="huffyuv_encoder"
2474 fic_decoder_select="golomb"
2475 flac_decoder_select="flacdsp"
2476 flac_encoder_select="bswapdsp flacdsp lpc"
2477 flashsv2_decoder_select="zlib"
2478 flashsv2_encoder_select="zlib"
2479 flashsv_decoder_select="zlib"
2480 flashsv_encoder_select="zlib"
2481 flv_decoder_select="h263_decoder"
2482 flv_encoder_select="h263_encoder"
2483 fourxm_decoder_select="blockdsp bswapdsp"
2484 fraps_decoder_select="bswapdsp huffman"
2485 g2m_decoder_select="blockdsp idctdsp jpegtables zlib"
2486 g729_decoder_select="audiodsp"
2487 h261_decoder_select="mpegvideo"
2488 h261_encoder_select="aandcttables mpegvideoenc"
2489 h263_decoder_select="h263_parser h263dsp mpegvideo qpeldsp"
2490 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2491 h263i_decoder_select="h263_decoder"
2492 h263p_decoder_select="h263_decoder"
2493 h263p_encoder_select="h263_encoder"
2494 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2495 h264_decoder_suggest="error_resilience"
2496 hap_decoder_select="snappy texturedsp"
2497 hap_encoder_deps="libsnappy"
2498 hap_encoder_select="texturedspenc"
2499 hevc_decoder_select="bswapdsp cabac golomb hevcparse videodsp"
2500 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2501 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llvidencdsp"
2502 iac_decoder_select="imc_decoder"
2503 imc_decoder_select="bswapdsp fft mdct sinewin"
2504 indeo3_decoder_select="hpeldsp"
2505 indeo4_decoder_select="ividsp"
2506 indeo5_decoder_select="ividsp"
2507 interplay_video_decoder_select="hpeldsp"
2508 jpegls_decoder_select="mjpeg_decoder"
2509 jv_decoder_select="blockdsp"
2510 lagarith_decoder_select="llviddsp"
2511 ljpeg_encoder_select="aandcttables idctdsp jpegtables mpegvideoenc"
2512 magicyuv_decoder_select="llviddsp"
2513 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2514 metasound_decoder_select="lsp mdct sinewin"
2515 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2516 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp jpegtables"
2517 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2518 mjpegb_decoder_select="mjpeg_decoder"
2519 mlp_decoder_select="mlp_parser"
2520 mlp_encoder_select="lpc"
2521 motionpixels_decoder_select="bswapdsp"
2522 mp1_decoder_select="mpegaudio"
2523 mp1float_decoder_select="mpegaudio"
2524 mp2_decoder_select="mpegaudio"
2525 mp2float_decoder_select="mpegaudio"
2526 mp3_decoder_select="mpegaudio"
2527 mp3adu_decoder_select="mpegaudio"
2528 mp3adufloat_decoder_select="mpegaudio"
2529 mp3float_decoder_select="mpegaudio"
2530 mp3on4_decoder_select="mpegaudio"
2531 mp3on4float_decoder_select="mpegaudio"
2532 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2533 mpc8_decoder_select="mpegaudiodsp"
2534 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2535 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2536 mpegvideo_decoder_select="mpegvideo"
2537 mpeg1video_decoder_select="mpegvideo"
2538 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2539 mpeg2video_decoder_select="mpegvideo"
2540 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2541 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2542 mpeg4_encoder_select="h263_encoder"
2543 msa1_decoder_select="mss34dsp"
2544 mscc_decoder_select="zlib"
2545 msmpeg4v1_decoder_select="h263_decoder"
2546 msmpeg4v2_decoder_select="h263_decoder"
2547 msmpeg4v2_encoder_select="h263_encoder"
2548 msmpeg4v3_decoder_select="h263_decoder"
2549 msmpeg4v3_encoder_select="h263_encoder"
2550 mss2_decoder_select="mpegvideo qpeldsp vc1_decoder"
2551 mts2_decoder_select="mss34dsp"
2552 mxpeg_decoder_select="mjpeg_decoder"
2553 nellymoser_decoder_select="mdct sinewin"
2554 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2555 nuv_decoder_select="idctdsp lzo"
2556 on2avc_decoder_select="mdct"
2557 opus_decoder_deps="swresample"
2558 opus_decoder_select="mdct15"
2559 opus_encoder_select="audio_frame_queue mdct15"
2560 png_decoder_select="zlib"
2561 png_encoder_select="llvidencdsp zlib"
2562 prores_decoder_select="blockdsp idctdsp"
2563 prores_encoder_select="fdctdsp"
2564 qcelp_decoder_select="lsp"
2565 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2566 ra_144_decoder_select="audiodsp"
2567 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2568 ralf_decoder_select="golomb"
2569 rawvideo_decoder_select="bswapdsp"
2570 rscc_decoder_select="zlib"
2571 rtjpeg_decoder_select="me_cmp"
2572 rv10_decoder_select="h263_decoder"
2573 rv10_encoder_select="h263_encoder"
2574 rv20_decoder_select="h263_decoder"
2575 rv20_encoder_select="h263_encoder"
2576 rv30_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2577 rv40_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2578 screenpresso_decoder_select="zlib"
2579 shorten_decoder_select="bswapdsp"
2580 sipr_decoder_select="lsp"
2581 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2582 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2583 sonic_decoder_select="golomb rangecoder"
2584 sonic_encoder_select="golomb rangecoder"
2585 sonic_ls_encoder_select="golomb rangecoder"
2586 sp5x_decoder_select="mjpeg_decoder"
2587 srgc_decoder_select="zlib"
2588 svq1_decoder_select="hpeldsp"
2589 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2590 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2591 svq3_decoder_suggest="zlib"
2592 tak_decoder_select="audiodsp"
2593 tdsc_decoder_select="zlib mjpeg_decoder"
2594 theora_decoder_select="vp3_decoder"
2595 thp_decoder_select="mjpeg_decoder"
2596 tiff_decoder_suggest="zlib lzma"
2597 tiff_encoder_suggest="zlib"
2598 truehd_decoder_select="mlp_parser"
2599 truehd_encoder_select="lpc"
2600 truemotion2_decoder_select="bswapdsp"
2601 truespeech_decoder_select="bswapdsp"
2602 tscc_decoder_select="zlib"
2603 twinvq_decoder_select="mdct lsp sinewin"
2604 txd_decoder_select="texturedsp"
2605 utvideo_decoder_select="bswapdsp llviddsp"
2606 utvideo_encoder_select="bswapdsp huffman llvidencdsp"
2607 vble_decoder_select="llviddsp"
2608 vc1_decoder_select="blockdsp h263_decoder h264qpel intrax8 mpegvideo vc1dsp"
2609 vc1_qsv_decoder_deps="libmfx"
2610 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2611 vc1image_decoder_select="vc1_decoder"
2612 vorbis_decoder_select="mdct"
2613 vorbis_encoder_select="mdct"
2614 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2615 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2616 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2617 vp6a_decoder_select="vp6_decoder"
2618 vp6f_decoder_select="vp6_decoder"
2619 vp7_decoder_select="h264pred videodsp vp8dsp"
2620 vp8_decoder_select="h264pred videodsp vp8dsp"
2621 vp9_decoder_select="videodsp vp9_parser"
2622 webp_decoder_select="vp8_decoder exif"
2623 wmalossless_decoder_select="llauddsp"
2624 wmapro_decoder_select="mdct sinewin wma_freqs"
2625 wmav1_decoder_select="mdct sinewin wma_freqs"
2626 wmav1_encoder_select="mdct sinewin wma_freqs"
2627 wmav2_decoder_select="mdct sinewin wma_freqs"
2628 wmav2_encoder_select="mdct sinewin wma_freqs"
2629 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2630 wmv1_decoder_select="h263_decoder"
2631 wmv1_encoder_select="h263_encoder"
2632 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2633 wmv2_encoder_select="h263_encoder wmv2dsp"
2634 wmv3_decoder_select="vc1_decoder"
2635 wmv3image_decoder_select="wmv3_decoder"
2636 xma1_decoder_select="wmapro_decoder"
2637 xma2_decoder_select="wmapro_decoder"
2638 zerocodec_decoder_select="zlib"
2639 zlib_decoder_select="zlib"
2640 zlib_encoder_select="zlib"
2641 zmbv_decoder_select="zlib"
2642 zmbv_encoder_select="zlib"
2643
2644 # hardware accelerators
2645 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2646 cuda_deps_any="dlopen LoadLibrary"
2647 cuvid_deps="cuda"
2648 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder ID3D11VideoContext"
2649 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32"
2650 dxva2_extralibs="-luser32"
2651 vda_framework_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension"
2652 vda_framework_extralibs="-framework VideoDecodeAcceleration"
2653 vda_deps="vda_framework pthreads"
2654 vda_extralibs="-framework CoreFoundation -framework QuartzCore"
2655 videotoolbox_hwaccel_deps="videotoolbox pthreads"
2656 videotoolbox_hwaccel_extralibs="-framework QuartzCore"
2657 xvmc_deps="X11_extensions_XvMClib_h"
2658
2659 h263_vaapi_hwaccel_deps="vaapi"
2660 h263_vaapi_hwaccel_select="h263_decoder"
2661 h263_videotoolbox_hwaccel_deps="videotoolbox"
2662 h263_videotoolbox_hwaccel_select="h263_decoder"
2663 h264_cuvid_hwaccel_deps="cuda cuvid"
2664 h264_cuvid_hwaccel_select="h264_cuvid_decoder"
2665 h264_d3d11va_hwaccel_deps="d3d11va"
2666 h264_d3d11va_hwaccel_select="h264_decoder"
2667 h264_d3d11va2_hwaccel_deps="d3d11va"
2668 h264_d3d11va2_hwaccel_select="h264_decoder"
2669 h264_dxva2_hwaccel_deps="dxva2"
2670 h264_dxva2_hwaccel_select="h264_decoder"
2671 h264_mediacodec_hwaccel_deps="mediacodec"
2672 h264_mmal_hwaccel_deps="mmal"
2673 h264_qsv_hwaccel_deps="libmfx"
2674 h264_vaapi_hwaccel_deps="vaapi"
2675 h264_vaapi_hwaccel_select="h264_decoder"
2676 h264_vda_hwaccel_deps="vda"
2677 h264_vda_hwaccel_select="h264_decoder"
2678 h264_vda_old_hwaccel_deps="vda"
2679 h264_vda_old_hwaccel_select="h264_decoder"
2680 h264_vdpau_hwaccel_deps="vdpau"
2681 h264_vdpau_hwaccel_select="h264_decoder"
2682 h264_videotoolbox_hwaccel_deps="videotoolbox"
2683 h264_videotoolbox_hwaccel_select="h264_decoder"
2684 hevc_cuvid_hwaccel_deps="cuda cuvid"
2685 hevc_cuvid_hwaccel_select="hevc_cuvid_decoder"
2686 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2687 hevc_d3d11va_hwaccel_select="hevc_decoder"
2688 hevc_mediacodec_hwaccel_deps="mediacodec"
2689 hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2690 hevc_d3d11va2_hwaccel_select="hevc_decoder"
2691 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2692 hevc_dxva2_hwaccel_select="hevc_decoder"
2693 hevc_qsv_hwaccel_deps="libmfx"
2694 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2695 hevc_vaapi_hwaccel_select="hevc_decoder"
2696 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2697 hevc_vdpau_hwaccel_select="hevc_decoder"
2698 mjpeg_cuvid_hwaccel_deps="cuda cuvid"
2699 mjpeg_cuvid_hwaccel_select="mjpeg_cuvid_decoder"
2700 mpeg_xvmc_hwaccel_deps="xvmc"
2701 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2702 mpeg1_cuvid_hwaccel_deps="cuda cuvid"
2703 mpeg1_cuvid_hwaccel_select="mpeg1_cuvid_decoder"
2704 mpeg1_vdpau_hwaccel_deps="vdpau"
2705 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2706 mpeg1_videotoolbox_hwaccel_deps="videotoolbox"
2707 mpeg1_videotoolbox_hwaccel_select="mpeg1video_decoder"
2708 mpeg1_xvmc_hwaccel_deps="xvmc"
2709 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2710 mpeg2_cuvid_hwaccel_deps="cuda cuvid"
2711 mpeg2_cuvid_hwaccel_select="mpeg2_cuvid_decoder"
2712 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2713 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2714 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2715 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2716 mpeg2_dxva2_hwaccel_deps="dxva2"
2717 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2718 mpeg2_mediacodec_hwaccel_deps="mediacodec"
2719 mpeg2_mmal_hwaccel_deps="mmal"
2720 mpeg2_qsv_hwaccel_deps="libmfx"
2721 mpeg2_qsv_hwaccel_select="qsvdec_mpeg2"
2722 mpeg2_vaapi_hwaccel_deps="vaapi"
2723 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2724 mpeg2_vdpau_hwaccel_deps="vdpau"
2725 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2726 mpeg2_videotoolbox_hwaccel_deps="videotoolbox"
2727 mpeg2_videotoolbox_hwaccel_select="mpeg2video_decoder"
2728 mpeg2_xvmc_hwaccel_deps="xvmc"
2729 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2730 mpeg4_cuvid_hwaccel_deps="cuda cuvid"
2731 mpeg4_cuvid_hwaccel_select="mpeg4_cuvid_decoder"
2732 mpeg4_mediacodec_hwaccel_deps="mediacodec"
2733 mpeg4_mmal_hwaccel_deps="mmal"
2734 mpeg4_vaapi_hwaccel_deps="vaapi"
2735 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2736 mpeg4_vdpau_hwaccel_deps="vdpau"
2737 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2738 mpeg4_videotoolbox_hwaccel_deps="videotoolbox"
2739 mpeg4_videotoolbox_hwaccel_select="mpeg4_decoder"
2740 vc1_cuvid_hwaccel_deps="cuda cuvid"
2741 vc1_cuvid_hwaccel_select="vc1_cuvid_decoder"
2742 vc1_d3d11va_hwaccel_deps="d3d11va"
2743 vc1_d3d11va_hwaccel_select="vc1_decoder"
2744 vc1_d3d11va2_hwaccel_deps="d3d11va"
2745 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2746 vc1_dxva2_hwaccel_deps="dxva2"
2747 vc1_dxva2_hwaccel_select="vc1_decoder"
2748 vc1_mmal_hwaccel_deps="mmal"
2749 vc1_qsv_hwaccel_deps="libmfx"
2750 vc1_qsv_hwaccel_select="qsvdec_vc1"
2751 vc1_vaapi_hwaccel_deps="vaapi"
2752 vc1_vaapi_hwaccel_select="vc1_decoder"
2753 vc1_vdpau_hwaccel_deps="vdpau"
2754 vc1_vdpau_hwaccel_select="vc1_decoder"
2755 vp8_cuvid_hwaccel_deps="cuda cuvid"
2756 vp8_cuvid_hwaccel_select="vp8_cuvid_decoder"
2757 vp9_cuvid_hwaccel_deps="cuda cuvid"
2758 vp9_cuvid_hwaccel_select="vp9_cuvid_decoder"
2759 vp8_mediacodec_hwaccel_deps="mediacodec"
2760 vp8_qsv_hwaccel_deps="libmfx"
2761 vp9_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2762 vp9_d3d11va_hwaccel_select="vp9_decoder"
2763 vp9_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2764 vp9_d3d11va2_hwaccel_select="vp9_decoder"
2765 vp9_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_VP9"
2766 vp9_dxva2_hwaccel_select="vp9_decoder"
2767 vp9_mediacodec_hwaccel_deps="mediacodec"
2768 vp9_vaapi_hwaccel_deps="vaapi VADecPictureParameterBufferVP9_bit_depth"
2769 vp9_vaapi_hwaccel_select="vp9_decoder"
2770 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2771 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2772 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2773 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2774 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2775
2776 # hardware-accelerated codecs
2777 omx_deps="dlopen pthreads"
2778 omx_extralibs='$ldl'
2779 omx_rpi_select="omx"
2780 qsvdec_select="qsv"
2781 qsvenc_select="qsv"
2782 vaapi_encode_deps="vaapi"
2783 v4l2_m2m_deps_any="linux_videodev2_h"
2784
2785 hwupload_cuda_filter_deps="cuda"
2786 scale_npp_filter_deps="cuda libnpp"
2787 scale_cuda_filter_deps="cuda_sdk"
2788 thumbnail_cuda_filter_deps="cuda_sdk"
2789
2790 nvenc_deps="cuda"
2791 nvenc_deps_any="dlopen LoadLibrary"
2792 nvenc_encoder_deps="nvenc"
2793
2794 h263_v4l2m2m_decoder_deps="v4l2_m2m h263_v4l2_m2m"
2795 h263_v4l2m2m_encoder_deps="v4l2_m2m h263_v4l2_m2m"
2796 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2797 h264_cuvid_decoder_deps="cuda cuvid"
2798 h264_cuvid_decoder_select="h264_mp4toannexb_bsf"
2799 h264_mediacodec_decoder_deps="mediacodec"
2800 h264_mediacodec_decoder_select="h264_mp4toannexb_bsf h264_parser"
2801 h264_mmal_decoder_deps="mmal"
2802 h264_nvenc_encoder_deps="nvenc"
2803 h264_omx_encoder_deps="omx"
2804 h264_qsv_decoder_deps="libmfx"
2805 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2806 h264_qsv_encoder_deps="libmfx"
2807 h264_qsv_encoder_select="qsvenc"
2808 h264_rkmpp_decoder_deps="rkmpp"
2809 h264_rkmpp_decoder_select="h264_mp4toannexb_bsf"
2810 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2811 h264_vaapi_encoder_select="vaapi_encode golomb"
2812 h264_vda_decoder_deps="vda"
2813 h264_vda_decoder_select="h264_decoder"
2814 h264_vdpau_decoder_deps="vdpau"
2815 h264_vdpau_decoder_select="h264_decoder"
2816 h264_v4l2m2m_decoder_deps="v4l2_m2m h264_v4l2_m2m"
2817 h264_v4l2m2m_encoder_deps="v4l2_m2m h264_v4l2_m2m"
2818 hevc_cuvid_decoder_deps="cuda cuvid"
2819 hevc_cuvid_decoder_select="hevc_mp4toannexb_bsf"
2820 hevc_mediacodec_decoder_deps="mediacodec"
2821 hevc_mediacodec_decoder_select="hevc_mp4toannexb_bsf hevc_parser"
2822 hevc_nvenc_encoder_deps="nvenc"
2823 hevc_qsv_decoder_deps="libmfx"
2824 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
2825 hevc_qsv_encoder_deps="libmfx"
2826 hevc_qsv_encoder_select="hevcparse qsvenc"
2827 hevc_rkmpp_decoder_deps="rkmpp"
2828 hevc_rkmpp_decoder_select="hevc_mp4toannexb_bsf"
2829 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2830 hevc_vaapi_encoder_select="vaapi_encode golomb"
2831 hevc_v4l2m2m_decoder_deps="v4l2_m2m hevc_v4l2_m2m"
2832 hevc_v4l2m2m_encoder_deps="v4l2_m2m hevc_v4l2_m2m"
2833 mjpeg_cuvid_decoder_deps="cuda cuvid"
2834 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2835 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2836 mpeg1_cuvid_decoder_deps="cuda cuvid"
2837 mpeg1_vdpau_decoder_deps="vdpau"
2838 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2839 mpeg1_v4l2m2m_decoder_deps="v4l2_m2m mpeg1_v4l2_m2m"
2840 mpeg2_crystalhd_decoder_select="crystalhd"
2841 mpeg2_cuvid_decoder_deps="cuda cuvid"
2842 mpeg2_mmal_decoder_deps="mmal"
2843 mpeg2_mediacodec_decoder_deps="mediacodec"
2844 mpeg2_qsv_decoder_deps="libmfx"
2845 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel"
2846 mpeg2_qsv_encoder_deps="libmfx"
2847 mpeg2_qsv_encoder_select="qsvenc"
2848 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2849 mpeg2_vaapi_encoder_select="vaapi_encode"
2850 mpeg2_v4l2m2m_decoder_deps="v4l2_m2m mpeg2_v4l2_m2m"
2851 mpeg4_crystalhd_decoder_select="crystalhd"
2852 mpeg4_cuvid_decoder_deps="cuda cuvid"
2853 mpeg4_mediacodec_decoder_deps="mediacodec"
2854 mpeg4_mmal_decoder_deps="mmal"
2855 mpeg4_omx_encoder_deps="omx"
2856 mpeg4_vdpau_decoder_deps="vdpau"
2857 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2858 mpeg4_v4l2m2m_decoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
2859 mpeg4_v4l2m2m_encoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
2860 mpeg_vdpau_decoder_deps="vdpau"
2861 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2862 msmpeg4_crystalhd_decoder_select="crystalhd"
2863 nvenc_h264_encoder_select="h264_nvenc_encoder"
2864 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2865 vc1_crystalhd_decoder_select="crystalhd"
2866 vc1_cuvid_decoder_deps="cuda cuvid"
2867 vc1_mmal_decoder_deps="mmal"
2868 vc1_vdpau_decoder_deps="vdpau"
2869 vc1_vdpau_decoder_select="vc1_decoder"
2870 vc1_v4l2m2m_decoder_deps="v4l2_m2m vc1_v4l2_m2m"
2871 vp8_cuvid_decoder_deps="cuda cuvid"
2872 vp8_mediacodec_decoder_deps="mediacodec"
2873 vp8_qsv_decoder_deps="libmfx"
2874 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2875 vp8_rkmpp_decoder_deps="rkmpp"
2876 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2877 vp8_vaapi_encoder_select="vaapi_encode"
2878 vp8_v4l2m2m_decoder_deps="v4l2_m2m vp8_v4l2_m2m"
2879 vp8_v4l2m2m_encoder_deps="v4l2_m2m vp8_v4l2_m2m"
2880 vp9_cuvid_decoder_deps="cuda cuvid"
2881 vp9_mediacodec_decoder_deps="mediacodec"
2882 vp9_rkmpp_decoder_deps="rkmpp"
2883 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2884 vp9_vaapi_encoder_select="vaapi_encode"
2885 vp9_v4l2m2m_decoder_deps="v4l2_m2m vp9_v4l2_m2m"
2886 wmv3_crystalhd_decoder_select="crystalhd"
2887 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2888
2889 # parsers
2890 h264_parser_select="golomb h264dsp h264parse"
2891 hevc_parser_select="hevcparse"
2892 mpegaudio_parser_select="mpegaudioheader"
2893 mpegvideo_parser_select="mpegvideo"
2894 mpeg4video_parser_select="h263dsp mpegvideo qpeldsp"
2895 vc1_parser_select="vc1dsp"
2896
2897 # bitstream_filters
2898 mjpeg2jpeg_bsf_select="jpegtables"
2899
2900 # external libraries
2901 aac_at_decoder_deps="audiotoolbox"
2902 ac3_at_decoder_deps="audiotoolbox"
2903 ac3_at_decoder_select="ac3_parser"
2904 adpcm_ima_qt_at_decoder_deps="audiotoolbox"
2905 alac_at_decoder_deps="audiotoolbox"
2906 amr_nb_at_decoder_deps="audiotoolbox"
2907 avisynth_deps_any="dlopen LoadLibrary"
2908 avisynth_demuxer_deps="avisynth"
2909 avisynth_demuxer_select="riffdec"
2910 eac3_at_decoder_deps="audiotoolbox"
2911 eac3_at_decoder_select="ac3_parser"
2912 gsm_ms_at_decoder_deps="audiotoolbox"
2913 ilbc_at_decoder_deps="audiotoolbox"
2914 mp1_at_decoder_deps="audiotoolbox"
2915 mp2_at_decoder_deps="audiotoolbox"
2916 mp3_at_decoder_deps="audiotoolbox"
2917 mp1_at_decoder_select="mpegaudioheader"
2918 mp2_at_decoder_select="mpegaudioheader"
2919 mp3_at_decoder_select="mpegaudioheader"
2920 pcm_alaw_at_decoder_deps="audiotoolbox"
2921 pcm_mulaw_at_decoder_deps="audiotoolbox"
2922 qdmc_at_decoder_deps="audiotoolbox"
2923 qdm2_at_decoder_deps="audiotoolbox"
2924 aac_at_encoder_deps="audiotoolbox"
2925 aac_at_encoder_select="audio_frame_queue"
2926 alac_at_encoder_deps="audiotoolbox"
2927 alac_at_encoder_select="audio_frame_queue"
2928 ilbc_at_encoder_deps="audiotoolbox"
2929 ilbc_at_encoder_select="audio_frame_queue"
2930 pcm_alaw_at_encoder_deps="audiotoolbox"
2931 pcm_alaw_at_encoder_select="audio_frame_queue"
2932 pcm_mulaw_at_encoder_deps="audiotoolbox"
2933 pcm_mulaw_at_encoder_select="audio_frame_queue"
2934 chromaprint_muxer_deps="chromaprint"
2935 h264_videotoolbox_encoder_deps="videotoolbox_encoder pthreads"
2936 libcelt_decoder_deps="libcelt"
2937 libfdk_aac_decoder_deps="libfdk_aac"
2938 libfdk_aac_encoder_deps="libfdk_aac"
2939 libfdk_aac_encoder_select="audio_frame_queue"
2940 libgme_demuxer_deps="libgme"
2941 libgsm_decoder_deps="libgsm"
2942 libgsm_encoder_deps="libgsm"
2943 libgsm_ms_decoder_deps="libgsm"
2944 libgsm_ms_encoder_deps="libgsm"
2945 libilbc_decoder_deps="libilbc"
2946 libilbc_encoder_deps="libilbc"
2947 libkvazaar_encoder_deps="libkvazaar"
2948 libmodplug_demuxer_deps="libmodplug"
2949 libmp3lame_encoder_deps="libmp3lame"
2950 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2951 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2952 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2953 libopencore_amrnb_encoder_select="audio_frame_queue"
2954 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2955 libopenh264_decoder_deps="libopenh264"
2956 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2957 libopenh264_encoder_deps="libopenh264"
2958 libopenjpeg_decoder_deps="libopenjpeg"
2959 libopenjpeg_encoder_deps="libopenjpeg"
2960 libopenmpt_demuxer_deps="libopenmpt"
2961 libopus_decoder_deps="libopus"
2962 libopus_encoder_deps="libopus"
2963 libopus_encoder_select="audio_frame_queue"
2964 librsvg_decoder_deps="librsvg"
2965 libshine_encoder_deps="libshine"
2966 libshine_encoder_select="audio_frame_queue"
2967 libspeex_decoder_deps="libspeex"
2968 libspeex_encoder_deps="libspeex"
2969 libspeex_encoder_select="audio_frame_queue"
2970 libtheora_encoder_deps="libtheora"
2971 libtwolame_encoder_deps="libtwolame"
2972 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2973 libvorbis_decoder_deps="libvorbis"
2974 libvorbis_encoder_deps="libvorbis"
2975 libvorbis_encoder_select="audio_frame_queue"
2976 libvpx_vp8_decoder_deps="libvpx"
2977 libvpx_vp8_encoder_deps="libvpx"
2978 libvpx_vp9_decoder_deps="libvpx"
2979 libvpx_vp9_encoder_deps="libvpx"
2980 libwavpack_encoder_deps="libwavpack"
2981 libwavpack_encoder_select="audio_frame_queue"
2982 libwebp_encoder_deps="libwebp"
2983 libwebp_anim_encoder_deps="libwebp"
2984 libx262_encoder_deps="libx262"
2985 libx264_encoder_deps="libx264"
2986 libx264rgb_encoder_deps="libx264 x264_csp_bgr"
2987 libx264rgb_encoder_select="libx264_encoder"
2988 libx265_encoder_deps="libx265"
2989 libxavs_encoder_deps="libxavs"
2990 libxvid_encoder_deps="libxvid"
2991 libzvbi_teletext_decoder_deps="libzvbi"
2992 videotoolbox_extralibs="-framework CoreFoundation -framework VideoToolbox -framework CoreMedia -framework CoreVideo"
2993 videotoolbox_encoder_deps="videotoolbox VTCompressionSessionPrepareToEncodeFrames"
2994 videotoolbox_encoder_suggest="vda_framework"
2995
2996 # demuxers / muxers
2997 ac3_demuxer_select="ac3_parser"
2998 aiff_muxer_select="iso_media"
2999 asf_demuxer_select="riffdec"
3000 asf_o_demuxer_select="riffdec"
3001 asf_muxer_select="riffenc"
3002 asf_stream_muxer_select="asf_muxer"
3003 avi_demuxer_select="iso_media riffdec exif"
3004 avi_muxer_select="riffenc"
3005 caf_demuxer_select="iso_media riffdec"
3006 caf_muxer_select="iso_media"
3007 dash_muxer_select="mp4_muxer"
3008 dash_demuxer_deps="libxml2"
3009 dirac_demuxer_select="dirac_parser"
3010 dts_demuxer_select="dca_parser"
3011 dtshd_demuxer_select="dca_parser"
3012 dv_demuxer_select="dvprofile"
3013 dv_muxer_select="dvprofile"
3014 dxa_demuxer_select="riffdec"
3015 eac3_demuxer_select="ac3_parser"
3016 f4v_muxer_select="mov_muxer"
3017 fifo_muxer_deps="threads"
3018 flac_demuxer_select="flac_parser"
3019 hds_muxer_select="flv_muxer"
3020 hls_muxer_select="mpegts_muxer"
3021 image2_alias_pix_demuxer_select="image2_demuxer"
3022 image2_brender_pix_demuxer_select="image2_demuxer"
3023 ipod_muxer_select="mov_muxer"
3024 ismv_muxer_select="mov_muxer"
3025 matroska_audio_muxer_select="matroska_muxer"
3026 matroska_demuxer_select="iso_media riffdec"
3027 matroska_demuxer_suggest="bzlib lzo zlib"
3028 matroska_muxer_select="iso_media riffenc"
3029 mmf_muxer_select="riffenc"
3030 mov_demuxer_select="iso_media riffdec"
3031 mov_demuxer_suggest="zlib"
3032 mov_muxer_select="iso_media riffenc rtpenc_chain"
3033 mp3_demuxer_select="mpegaudio_parser"
3034 mp3_muxer_select="mpegaudioheader"
3035 mp4_muxer_select="mov_muxer"
3036 mpegts_demuxer_select="iso_media"
3037 mpegts_muxer_select="adts_muxer latm_muxer"
3038 mpegtsraw_demuxer_select="mpegts_demuxer"
3039 mxf_d10_muxer_select="mxf_muxer"
3040 mxf_opatom_muxer_select="mxf_muxer"
3041 nut_muxer_select="riffenc"
3042 nuv_demuxer_select="riffdec"
3043 oga_muxer_select="ogg_muxer"
3044 ogg_demuxer_select="dirac_parse"
3045 ogv_muxer_select="ogg_muxer"
3046 opus_muxer_select="ogg_muxer"
3047 psp_muxer_select="mov_muxer"
3048 rtp_demuxer_select="sdp_demuxer"
3049 rtp_muxer_select="golomb"
3050 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
3051 rtsp_demuxer_select="http_protocol rtpdec"
3052 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
3053 sap_demuxer_select="sdp_demuxer"
3054 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
3055 sdp_demuxer_select="rtpdec"
3056 smoothstreaming_muxer_select="ismv_muxer"
3057 spdif_muxer_select="aac_parser"
3058 spx_muxer_select="ogg_muxer"
3059 swf_demuxer_suggest="zlib"
3060 tak_demuxer_select="tak_parser"
3061 tg2_muxer_select="mov_muxer"
3062 tgp_muxer_select="mov_muxer"
3063 vobsub_demuxer_select="mpegps_demuxer"
3064 w64_demuxer_select="wav_demuxer"
3065 w64_muxer_select="wav_muxer"
3066 wav_demuxer_select="riffdec"
3067 wav_muxer_select="riffenc"
3068 webm_muxer_select="iso_media riffenc"
3069 webm_dash_manifest_demuxer_select="matroska_demuxer"
3070 wtv_demuxer_select="mpegts_demuxer riffdec"
3071 wtv_muxer_select="mpegts_muxer riffenc"
3072 xmv_demuxer_select="riffdec"
3073 xwma_demuxer_select="riffdec"
3074
3075 # indevs / outdevs
3076 alsa_indev_deps="alsa"
3077 alsa_outdev_deps="alsa"
3078 avfoundation_indev_deps="avfoundation pthreads"
3079 avfoundation_indev_extralibs="-framework Foundation -framework CoreVideo -framework CoreMedia"
3080 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
3081 caca_outdev_deps="libcaca"
3082 decklink_indev_deps="decklink threads"
3083 decklink_indev_extralibs="-lstdc++"
3084 decklink_outdev_deps="decklink threads"
3085 decklink_outdev_extralibs="-lstdc++"
3086 libndi_newtek_indev_deps="libndi_newtek"
3087 libndi_newtek_indev_extralibs="-lndi"
3088 libndi_newtek_outdev_deps="libndi_newtek"
3089 libndi_newtek_outdev_extralibs="-lndi"
3090 dshow_indev_deps="IBaseFilter"
3091 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi"
3092 fbdev_indev_deps="linux_fb_h"
3093 fbdev_outdev_deps="linux_fb_h"
3094 gdigrab_indev_deps="CreateDIBSection"
3095 gdigrab_indev_extralibs="-lgdi32"
3096 gdigrab_indev_select="bmp_decoder"
3097 iec61883_indev_deps="libiec61883"
3098 jack_indev_deps="jack"
3099 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
3100 kmsgrab_indev_deps="libdrm"
3101 lavfi_indev_deps="avfilter"
3102 libcdio_indev_deps="libcdio"
3103 libdc1394_indev_deps="libdc1394"
3104 libv4l2_indev_deps="libv4l2"
3105 openal_indev_deps="openal"
3106 opengl_outdev_deps="opengl"
3107 oss_indev_deps_any="soundcard_h sys_soundcard_h"
3108 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
3109 pulse_indev_deps="libpulse"
3110 pulse_outdev_deps="libpulse"
3111 sdl2_outdev_deps="sdl2"
3112 sndio_indev_deps="sndio"
3113 sndio_outdev_deps="sndio"
3114 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
3115 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
3116 vfwcap_indev_deps="vfw32 vfwcap_defines"
3117 xcbgrab_indev_deps="libxcb"
3118 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
3119 xv_outdev_extralibs="-lXv -lX11 -lXext"
3120
3121 # protocols
3122 async_protocol_deps="threads"
3123 bluray_protocol_deps="libbluray"
3124 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
3125 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
3126 ffrtmpcrypt_protocol_select="tcp_protocol"
3127 ffrtmphttp_protocol_conflict="librtmp_protocol"
3128 ffrtmphttp_protocol_select="http_protocol"
3129 ftp_protocol_select="tcp_protocol"
3130 gopher_protocol_select="network"
3131 http_protocol_select="tcp_protocol"
3132 httpproxy_protocol_select="tcp_protocol"
3133 https_protocol_select="tls_protocol"
3134 icecast_protocol_select="http_protocol"
3135 librtmp_protocol_deps="librtmp"
3136 librtmpe_protocol_deps="librtmp"
3137 librtmps_protocol_deps="librtmp"
3138 librtmpt_protocol_deps="librtmp"
3139 librtmpte_protocol_deps="librtmp"
3140 libsmbclient_protocol_deps="libsmbclient gplv3"
3141 libssh_protocol_deps="libssh"
3142 mmsh_protocol_select="http_protocol"
3143 mmst_protocol_select="network"
3144 rtmp_protocol_conflict="librtmp_protocol"
3145 rtmp_protocol_select="tcp_protocol"
3146 rtmpe_protocol_select="ffrtmpcrypt_protocol"
3147 rtmps_protocol_conflict="librtmp_protocol"
3148 rtmps_protocol_select="tls_protocol"
3149 rtmpt_protocol_select="ffrtmphttp_protocol"
3150 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
3151 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
3152 rtp_protocol_select="udp_protocol"
3153 sctp_protocol_deps="struct_sctp_event_subscribe struct_msghdr_msg_flags"
3154 sctp_protocol_select="network"
3155 srtp_protocol_select="rtp_protocol srtp"
3156 tcp_protocol_select="network"
3157 tls_gnutls_protocol_conflict="tls_schannel_protocol tls_securetransport_protocol"
3158 tls_gnutls_protocol_deps="gnutls"
3159 tls_gnutls_protocol_select="tcp_protocol"
3160 tls_openssl_protocol_conflict="tls_schannel_protocol tls_securetransport_protocol tls_gnutls_protocol"
3161 tls_openssl_protocol_deps="openssl"
3162 tls_openssl_protocol_select="tcp_protocol"
3163 tls_schannel_protocol_deps="schannel"
3164 tls_schannel_protocol_select="tcp_protocol"
3165 tls_securetransport_protocol_deps="securetransport"
3166 tls_securetransport_protocol_select="tcp_protocol"
3167 tls_protocol_deps_any="tls_schannel_protocol tls_securetransport_protocol tls_gnutls_protocol tls_openssl_protocol"
3168 udp_protocol_select="network"
3169 udplite_protocol_select="network"
3170 unix_protocol_deps="sys_un_h"
3171 unix_protocol_select="network"
3172
3173 # filters
3174 afftfilt_filter_deps="avcodec"
3175 afftfilt_filter_select="fft"
3176 afir_filter_deps="avcodec"
3177 afir_filter_select="fft"
3178 amovie_filter_deps="avcodec avformat"
3179 aresample_filter_deps="swresample"
3180 ass_filter_deps="libass"
3181 atempo_filter_deps="avcodec"
3182 atempo_filter_select="rdft"
3183 azmq_filter_deps="libzmq"
3184 blackframe_filter_deps="gpl"
3185 boxblur_filter_deps="gpl"
3186 bs2b_filter_deps="libbs2b"
3187 colormatrix_filter_deps="gpl"
3188 coreimage_filter_deps="coreimage appkit"
3189 coreimage_filter_extralibs="-framework OpenGL"
3190 coreimagesrc_filter_deps="coreimage appkit"
3191 coreimagesrc_filter_extralibs="-framework OpenGL"
3192 cover_rect_filter_deps="avcodec avformat gpl"
3193 cropdetect_filter_deps="gpl"
3194 deinterlace_qsv_filter_deps="libmfx"
3195 deinterlace_vaapi_filter_deps="vaapi"
3196 delogo_filter_deps="gpl"
3197 deshake_filter_select="pixelutils"
3198 drawtext_filter_deps="libfreetype"
3199 elbg_filter_deps="avcodec"
3200 eq_filter_deps="gpl"
3201 fftfilt_filter_deps="avcodec"
3202 fftfilt_filter_select="rdft"
3203 find_rect_filter_deps="avcodec avformat gpl"
3204 firequalizer_filter_deps="avcodec"
3205 firequalizer_filter_select="rdft"
3206 flite_filter_deps="libflite"
3207 framerate_filter_select="pixelutils"
3208 frei0r_filter_deps="frei0r dlopen"
3209 frei0r_src_filter_deps="frei0r dlopen"
3210 fspp_filter_deps="gpl"
3211 geq_filter_deps="gpl"
3212 histeq_filter_deps="gpl"
3213 hqdn3d_filter_deps="gpl"
3214 interlace_filter_deps="gpl"
3215 kerndeint_filter_deps="gpl"
3216 ladspa_filter_deps="ladspa dlopen"
3217 mcdeint_filter_deps="avcodec gpl"
3218 movie_filter_deps="avcodec avformat"
3219 mpdecimate_filter_deps="gpl"
3220 mpdecimate_filter_select="pixelutils"
3221 mptestsrc_filter_deps="gpl"
3222 negate_filter_deps="lut_filter"
3223 nnedi_filter_deps="gpl"
3224 ocr_filter_deps="libtesseract"
3225 ocv_filter_deps="libopencv"
3226 owdenoise_filter_deps="gpl"
3227 pan_filter_deps="swresample"
3228 perspective_filter_deps="gpl"
3229 phase_filter_deps="gpl"
3230 pp7_filter_deps="gpl"
3231 pp_filter_deps="gpl postproc"
3232 pullup_filter_deps="gpl"
3233 removelogo_filter_deps="avcodec avformat swscale"
3234 repeatfields_filter_deps="gpl"
3235 resample_filter_deps="avresample"
3236 rubberband_filter_deps="librubberband"
3237 sab_filter_deps="gpl swscale"
3238 scale2ref_filter_deps="swscale"
3239 scale_filter_deps="swscale"
3240 scale_qsv_filter_deps="libmfx"
3241 select_filter_select="pixelutils"
3242 showcqt_filter_deps="avcodec avformat swscale"
3243 showcqt_filter_select="fft"
3244 showfreqs_filter_deps="avcodec"
3245 showfreqs_filter_select="fft"
3246 showspectrum_filter_deps="avcodec"
3247 showspectrum_filter_select="fft"
3248 showspectrumpic_filter_deps="avcodec"
3249 showspectrumpic_filter_select="fft"
3250 signature_filter_deps="gpl avcodec avformat"
3251 smartblur_filter_deps="gpl swscale"
3252 sofalizer_filter_deps="libmysofa avcodec"
3253 sofalizer_filter_select="fft"
3254 spectrumsynth_filter_deps="avcodec"
3255 spectrumsynth_filter_select="fft"
3256 spp_filter_deps="gpl avcodec"
3257 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
3258 stereo3d_filter_deps="gpl"
3259 subtitles_filter_deps="avformat avcodec libass"
3260 super2xsai_filter_deps="gpl"
3261 pixfmts_super2xsai_test_deps="super2xsai_filter"
3262 tinterlace_filter_deps="gpl"
3263 tinterlace_merge_test_deps="tinterlace_filter"
3264 tinterlace_pad_test_deps="tinterlace_filter"
3265 tonemap_filter_deps="const_nan"
3266 uspp_filter_deps="gpl avcodec"
3267 vaguedenoiser_filter_deps="gpl"
3268 vidstabdetect_filter_deps="libvidstab"
3269 vidstabtransform_filter_deps="libvidstab"
3270 libvmaf_filter_deps="libvmaf"
3271 zmq_filter_deps="libzmq"
3272 zoompan_filter_deps="swscale"
3273 zscale_filter_deps="libzimg const_nan"
3274 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
3275
3276 # examples
3277 avio_dir_cmd_deps="avformat avutil"
3278 avio_reading_deps="avformat avcodec avutil"
3279 decode_audio_example_deps="avcodec avutil"
3280 decode_video_example_deps="avcodec avutil"
3281 demuxing_decoding_example_deps="avcodec avformat avutil"
3282 encode_audio_example_deps="avcodec avutil"
3283 encode_video_example_deps="avcodec avutil"
3284 extract_mvs_example_deps="avcodec avformat avutil"
3285 filter_audio_example_deps="avfilter avutil"
3286 filtering_audio_example_deps="avfilter avcodec avformat avutil"
3287 filtering_video_example_deps="avfilter avcodec avformat avutil"
3288 http_multiclient_example_deps="avformat avutil fork"
3289 hw_decode_example_deps="avcodec avformat avutil"
3290 metadata_example_deps="avformat avutil"
3291 muxing_example_deps="avcodec avformat avutil swscale"
3292 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
3293 remuxing_example_deps="avcodec avformat avutil"
3294 resampling_audio_example_deps="avutil swresample"
3295 scaling_video_example_deps="avutil swscale"
3296 transcode_aac_example_deps="avcodec avformat swresample"
3297 transcoding_example_deps="avfilter avcodec avformat avutil"
3298
3299 # libraries, in linking order
3300 avcodec_deps="avutil"
3301 avcodec_select="null_bsf"
3302 avdevice_deps="avformat avcodec avutil"
3303 avfilter_deps="avutil"
3304 avformat_deps="avcodec avutil"
3305 avformat_suggest="network"
3306 avresample_deps="avutil"
3307 postproc_deps="avutil gpl"
3308 swresample_deps="avutil"
3309 swscale_deps="avutil"
3310
3311 # programs
3312 ffmpeg_deps="avcodec avfilter avformat swresample"
3313 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
3314                null_filter
3315                trim_filter"
3316 ffplay_deps="avcodec avformat swscale swresample sdl2"
3317 ffplay_extralibs='$sdl2_extralibs'
3318 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
3319 ffprobe_deps="avcodec avformat"
3320 ffserver_deps="avformat fork sarestart"
3321 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
3322
3323 # documentation
3324 podpages_deps="perl"
3325 manpages_deps="perl pod2man"
3326 htmlpages_deps="perl"
3327 htmlpages_deps_any="makeinfo_html texi2html"
3328 txtpages_deps="perl makeinfo"
3329 doc_deps_any="manpages htmlpages podpages txtpages"
3330
3331 # default parameters
3332
3333 logfile="ffbuild/config.log"
3334
3335 # installation paths
3336 prefix_default="/usr/local"
3337 bindir_default='${prefix}/bin'
3338 datadir_default='${prefix}/share/ffmpeg'
3339 docdir_default='${prefix}/share/doc/ffmpeg'
3340 incdir_default='${prefix}/include'
3341 libdir_default='${prefix}/lib'
3342 mandir_default='${prefix}/share/man'
3343
3344 # toolchain
3345 ar_default="ar"
3346 cc_default="gcc"
3347 cxx_default="g++"
3348 host_cc_default="gcc"
3349 doxygen_default="doxygen"
3350 install="install"
3351 ln_s_default="ln -s -f"
3352 nm_default="nm -g"
3353 pkg_config_default=pkg-config
3354 ranlib_default="ranlib"
3355 strip_default="strip"
3356 version_script='--version-script'
3357 x86asmexe_default="nasm"
3358 windres_default="windres"
3359 nvcc_default="nvcc"
3360 nvccflags_default="-gencode arch=compute_30,code=sm_30 -O2"
3361
3362 # OS
3363 target_os_default=$(tolower $(uname -s))
3364 host_os=$target_os_default
3365
3366 # machine
3367 if test "$target_os_default" = aix; then
3368     arch_default=$(uname -p)
3369     strip_default="strip -X32_64"
3370 else
3371     arch_default=$(uname -m)
3372 fi
3373 cpu="generic"
3374 intrinsics="none"
3375
3376 # configurable options
3377 enable $PROGRAM_LIST
3378 enable $DOCUMENT_LIST
3379 enable $EXAMPLE_LIST
3380 enable $(filter_out avresample $LIBRARY_LIST)
3381 enable stripping
3382
3383 enable asm
3384 enable debug
3385 enable doc
3386 enable faan faandct faanidct
3387 enable optimizations
3388 enable runtime_cpudetect
3389 enable safe_bitstream_reader
3390 enable static
3391 enable swscale_alpha
3392 enable valgrind_backtrace
3393
3394 sws_max_filter_size_default=256
3395 set_default sws_max_filter_size
3396
3397 # build settings
3398 SHFLAGS='-shared -Wl,-soname,$$(@F)'
3399 LIBPREF="lib"
3400 LIBSUF=".a"
3401 FULLNAME='$(NAME)$(BUILDSUF)'
3402 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
3403 SLIBPREF="lib"
3404 SLIBSUF=".so"
3405 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
3406 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
3407 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
3408 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
3409 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
3410 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
3411 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
3412
3413 asflags_filter=echo
3414 cflags_filter=echo
3415 ldflags_filter=echo
3416
3417 AS_C='-c'
3418 AS_O='-o $@'
3419 CC_C='-c'
3420 CC_E='-E -o $@'
3421 CC_O='-o $@'
3422 CXX_C='-c'
3423 CXX_O='-o $@'
3424 OBJCC_C='-c'
3425 OBJCC_E='-E -o $@'
3426 OBJCC_O='-o $@'
3427 X86ASM_O='-o $@'
3428 LD_O='-o $@'
3429 LD_LIB='-l%'
3430 LD_PATH='-L'
3431 HOSTCC_C='-c'
3432 HOSTCC_E='-E -o $@'
3433 HOSTCC_O='-o $@'
3434 HOSTLD_O='-o $@'
3435 NVCC_C='-c'
3436 NVCC_O='-o $@'
3437
3438 host_extralibs='-lm'
3439 host_cflags_filter=echo
3440 host_ldflags_filter=echo
3441
3442 target_path='$(CURDIR)'
3443
3444 # since the object filename is not given with the -MM flag, the compiler
3445 # is only able to print the basename, and we must add the path ourselves
3446 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(@F),$(@D)/$(@F)," > $(@:.o=.d)'
3447 DEPFLAGS='-MM'
3448
3449 mkdir -p ffbuild
3450
3451 # find source path
3452 if test -f configure; then
3453     source_path=.
3454 else
3455     source_path=$(cd $(dirname "$0"); pwd)
3456     case "$source_path" in
3457         *[[:blank:]]*) die "Out of tree builds are impossible with whitespace in source path." ;;
3458     esac
3459     test -e "$source_path/config.h" &&
3460         die "Out of tree builds are impossible with config.h in source dir."
3461 fi
3462
3463 for v in "$@"; do
3464     r=${v#*=}
3465     l=${v%"$r"}
3466     r=$(sh_quote "$r")
3467     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
3468 done
3469
3470 find_things(){
3471     thing=$1
3472     pattern=$2
3473     file=$source_path/$3
3474     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
3475 }
3476
3477 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
3478 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
3479 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
3480 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
3481 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
3482 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
3483 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
3484 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
3485 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
3486
3487 find_things_extern(){
3488     thing=$1
3489     pattern=$2
3490     file=$source_path/$3
3491     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
3492 }
3493
3494 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
3495 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
3496
3497 ALL_COMPONENTS="
3498     $BSF_LIST
3499     $DECODER_LIST
3500     $DEMUXER_LIST
3501     $ENCODER_LIST
3502     $FILTER_LIST
3503     $HWACCEL_LIST
3504     $INDEV_LIST
3505     $MUXER_LIST
3506     $OUTDEV_LIST
3507     $PARSER_LIST
3508     $PROTOCOL_LIST
3509 "
3510
3511 for n in $COMPONENT_LIST; do
3512     v=$(toupper ${n%s})_LIST
3513     eval enable \$$v
3514     eval ${n}_if_any="\$$v"
3515 done
3516
3517 enable $ARCH_EXT_LIST
3518
3519 die_unknown(){
3520     echo "Unknown option \"$1\"."
3521     echo "See $0 --help for available options."
3522     exit 1
3523 }
3524
3525 print_in_columns() {
3526     cols=$(expr $ncols / 24)
3527     cat | tr ' ' '\n' | sort | pr -r "-$cols" -w $ncols -t
3528 }
3529
3530 show_list() {
3531     suffix=_$1
3532     shift
3533     echo $* | sed s/$suffix//g | print_in_columns
3534     exit 0
3535 }
3536
3537 rand_list(){
3538     IFS=', '
3539     set -- $*
3540     unset IFS
3541     for thing; do
3542         comp=${thing%:*}
3543         prob=${thing#$comp}
3544         prob=${prob#:}
3545         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
3546         echo "prob ${prob:-0.5}"
3547         printf '%s\n' $comp
3548     done
3549 }
3550
3551 do_random(){
3552     action=$1
3553     shift
3554     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
3555     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
3556 }
3557
3558 for opt do
3559     optval="${opt#*=}"
3560     case "$opt" in
3561         --extra-ldflags=*)
3562             add_ldflags $optval
3563         ;;
3564         --extra-ldexeflags=*)
3565             add_ldexeflags $optval
3566         ;;
3567         --extra-ldlibflags=*)
3568             add_ldlibflags $optval
3569         ;;
3570         --extra-libs=*)
3571             add_extralibs $optval
3572         ;;
3573         --disable-devices)
3574             disable $INDEV_LIST $OUTDEV_LIST
3575         ;;
3576         --enable-debug=*)
3577             debuglevel="$optval"
3578         ;;
3579         --disable-programs)
3580             disable $PROGRAM_LIST
3581         ;;
3582         --disable-everything)
3583             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3584         ;;
3585         --disable-all)
3586             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3587             disable $LIBRARY_LIST $PROGRAM_LIST doc
3588             enable avutil
3589         ;;
3590         --enable-random|--disable-random)
3591             action=${opt%%-random}
3592             do_random ${action#--} $COMPONENT_LIST
3593         ;;
3594         --enable-random=*|--disable-random=*)
3595             action=${opt%%-random=*}
3596             do_random ${action#--} $optval
3597         ;;
3598         --enable-sdl)
3599             enable sdl2
3600         ;;
3601         --enable-*=*|--disable-*=*)
3602             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
3603             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
3604             eval list=\$$(toupper $thing)_LIST
3605             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
3606             list=$(filter "$name" $list)
3607             [ "$list" = "" ] && warn "Option $opt did not match anything"
3608             $action $list
3609         ;;
3610         --enable-yasm|--disable-yasm)
3611             warn "The ${opt} option is only provided for compatibility and will be\n"\
3612                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
3613             test $opt = --enable-yasm && x86asm=yes || x86asm=no
3614         ;;
3615         --yasmexe=*)
3616             warn "The --yasmexe option is only provided for compatibility and will be\n"\
3617                  "removed in the future. Use --x86asmexe instead."
3618             x86asmexe="$optval"
3619         ;;
3620         --enable-?*|--disable-?*)
3621             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
3622             if is_in $option $COMPONENT_LIST; then
3623                 test $action = disable && action=unset
3624                 eval $action \$$(toupper ${option%s})_LIST
3625             elif is_in $option $CMDLINE_SELECT; then
3626                 $action $option
3627             else
3628                 die_unknown $opt
3629             fi
3630         ;;
3631         --list-*)
3632             NAME="${opt#--list-}"
3633             is_in $NAME $COMPONENT_LIST || die_unknown $opt
3634             NAME=${NAME%s}
3635             eval show_list $NAME \$$(toupper $NAME)_LIST
3636         ;;
3637         --help|-h) show_help
3638         ;;
3639         --quiet|-q) quiet=yes
3640         ;;
3641         --fatal-warnings) enable fatal_warnings
3642         ;;
3643         --libfuzzer=*)
3644             libfuzzer_path="$optval"
3645         ;;
3646         *)
3647             optname="${opt%%=*}"
3648             optname="${optname#--}"
3649             optname=$(echo "$optname" | sed 's/-/_/g')
3650             if is_in $optname $CMDLINE_SET; then
3651                 eval $optname='$optval'
3652             elif is_in $optname $CMDLINE_APPEND; then
3653                 append $optname "$optval"
3654             else
3655                 die_unknown $opt
3656             fi
3657         ;;
3658     esac
3659 done
3660
3661 for e in $env; do
3662     eval "export $e"
3663 done
3664
3665 if disabled autodetect; then
3666
3667     # Unless iconv is explicitely disabled by the user, we still want to probe
3668     # for the iconv from the libc.
3669     disabled iconv || enable libc_iconv
3670
3671     disable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
3672     disable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
3673 fi
3674 # Mark specifically enabled, but normally autodetected libraries as requested.
3675 for lib in $AUTODETECT_LIBS; do
3676     enabled $lib && request $lib
3677 done
3678 #TODO: switch to $AUTODETECT_LIBS when $THREADS_LIST is supported the same way
3679 enable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
3680 enable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
3681
3682 disabled logging && logfile=/dev/null
3683
3684 die_license_disabled() {
3685     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
3686 }
3687
3688 die_license_disabled_gpl() {
3689     enabled $1 || { enabled $v && die "$v is incompatible with the gpl and --enable-$1 is not specified."; }
3690 }
3691
3692 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
3693 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
3694
3695 enabled gpl && map "die_license_disabled_gpl nonfree" $EXTERNAL_LIBRARY_NONFREE_LIST
3696 map "die_license_disabled nonfree" $HWACCEL_LIBRARY_NONFREE_LIST
3697
3698 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3699
3700 # Disable all the library-specific components if the library itself
3701 # is disabled, see AVCODEC_LIST and following _LIST variables.
3702
3703 disable_components(){
3704     disabled ${1} && disable $(
3705         eval components="\$$(toupper ${1})_COMPONENTS"
3706         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
3707     )
3708 }
3709
3710 map 'disable_components $v' $LIBRARY_LIST
3711
3712 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
3713 set >> $logfile
3714
3715 test -n "$valgrind" && toolchain="valgrind-memcheck"
3716
3717 enabled ossfuzz && {
3718     add_cflags  -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp -fno-omit-frame-pointer
3719     add_ldflags -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp
3720 }
3721
3722 case "$toolchain" in
3723     *-asan)
3724         cc_default="${toolchain%-asan}"
3725         add_cflags  -fsanitize=address
3726         add_ldflags -fsanitize=address
3727     ;;
3728     *-msan)
3729         cc_default="${toolchain%-msan}"
3730         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
3731         add_ldflags -fsanitize=memory
3732     ;;
3733     *-tsan)
3734         cc_default="${toolchain%-tsan}"
3735         add_cflags  -fsanitize=thread -fPIE
3736         add_ldflags -fsanitize=thread -pie
3737         case "$toolchain" in
3738             gcc-tsan)
3739                 add_cflags  -fPIC
3740                 add_ldflags -fPIC
3741                 ;;
3742         esac
3743     ;;
3744     *-usan)
3745         cc_default="${toolchain%-usan}"
3746         add_cflags  -fsanitize=undefined
3747         add_ldflags -fsanitize=undefined
3748     ;;
3749     valgrind-*)
3750         target_exec_default="valgrind"
3751         case "$toolchain" in
3752             valgrind-massif)
3753                 target_exec_args="--tool=massif --alloc-fn=av_malloc --alloc-fn=av_mallocz --alloc-fn=av_calloc --alloc-fn=av_fast_padded_malloc --alloc-fn=av_fast_malloc --alloc-fn=av_realloc_f --alloc-fn=av_fast_realloc --alloc-fn=av_realloc"
3754                 ;;
3755             valgrind-memcheck)
3756                 target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3757                 ;;
3758         esac
3759     ;;
3760     msvc)
3761         # Check whether the current MSVC version needs the C99 converter.
3762         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3763         # support enough of C99 to build ffmpeg. Default to the new
3764         # behaviour if the regexp was unable to match anything, since this
3765         # successfully parses the version number of existing supported
3766         # versions that require the converter (MSVC 2010 and 2012).
3767         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3768         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3769             cc_default="cl"
3770             cxx_default="cl"
3771         else
3772             cc_default="c99wrap cl"
3773             cxx_default="c99wrap cl"
3774         fi
3775         ld_default="$source_path/compat/windows/mslink"
3776         nm_default="dumpbin -symbols"
3777         ar_default="lib"
3778         case "$arch" in
3779         arm*)
3780             as_default="armasm"
3781             ;;
3782         esac
3783         target_os_default="win32"
3784         # Use a relative path for TMPDIR. This makes sure all the
3785         # ffconf temp files are written with a relative path, avoiding
3786         # issues with msys/win32 path conversion for MSVC parameters
3787         # such as -Fo<file> or -out:<file>.
3788         TMPDIR=.
3789     ;;
3790     icl)
3791         cc_default="icl"
3792         ld_default="xilink"
3793         nm_default="dumpbin -symbols"
3794         ar_default="xilib"
3795         target_os_default="win32"
3796         TMPDIR=.
3797     ;;
3798     gcov)
3799         add_cflags  -fprofile-arcs -ftest-coverage
3800         add_ldflags -fprofile-arcs -ftest-coverage
3801     ;;
3802     llvm-cov)
3803         add_cflags -fprofile-arcs -ftest-coverage
3804         add_ldflags --coverage
3805     ;;
3806     hardened)
3807         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3808         add_cflags   -fno-strict-overflow -fstack-protector-all
3809         add_ldflags  -Wl,-z,relro -Wl,-z,now
3810         add_cflags   -fPIE
3811         add_ldexeflags -fPIE -pie
3812     ;;
3813     ?*)
3814         die "Unknown toolchain $toolchain"
3815     ;;
3816 esac
3817
3818 test -n "$cross_prefix" && enable cross_compile
3819
3820 if enabled cross_compile; then
3821     test -n "$arch" && test -n "$target_os" ||
3822         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3823 fi
3824
3825 ar_default="${cross_prefix}${ar_default}"
3826 cc_default="${cross_prefix}${cc_default}"
3827 cxx_default="${cross_prefix}${cxx_default}"
3828 nm_default="${cross_prefix}${nm_default}"
3829 pkg_config_default="${cross_prefix}${pkg_config_default}"
3830 if ${cross_prefix}${ranlib_default} 2>&1 | grep -q "\-D "; then
3831     ranlib_default="${cross_prefix}${ranlib_default} -D"
3832 else
3833     ranlib_default="${cross_prefix}${ranlib_default}"
3834 fi
3835 strip_default="${cross_prefix}${strip_default}"
3836 windres_default="${cross_prefix}${windres_default}"
3837
3838 sysinclude_default="${sysroot}/usr/include"
3839
3840 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3841     target_exec target_os x86asmexe nvcc
3842 enabled cross_compile || host_cc_default=$cc
3843 set_default host_cc
3844
3845 pkg_config_fail_message=""
3846 if ! $pkg_config --version >/dev/null 2>&1; then
3847     warn "$pkg_config not found, library detection may fail."
3848     pkg_config=false
3849 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3850     pkg_config_fail_message="
3851 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3852 fi
3853
3854 if test $doxygen != $doxygen_default && \
3855   ! $doxygen --version >/dev/null 2>&1; then
3856     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3857 fi
3858
3859 exesuf() {
3860     case $1 in
3861         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3862     esac
3863 }
3864
3865 EXESUF=$(exesuf $target_os)
3866 HOSTEXESUF=$(exesuf $host_os)
3867
3868 # set temporary file name
3869 : ${TMPDIR:=$TEMPDIR}
3870 : ${TMPDIR:=$TMP}
3871 : ${TMPDIR:=/tmp}
3872
3873 if [ -n "$tempprefix" ] ; then
3874     mktemp(){
3875         tmpname="$tempprefix.${HOSTNAME}.${UID}"
3876         echo "$tmpname"
3877         mkdir "$tmpname"
3878     }
3879 elif ! check_cmd mktemp -u XXXXXX; then
3880     # simple replacement for missing mktemp
3881     # NOT SAFE FOR GENERAL USE
3882     mktemp(){
3883         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3884         echo "$tmpname"
3885         mkdir "$tmpname"
3886     }
3887 fi
3888
3889 FFTMPDIR=$(mktemp -d "${TMPDIR}/ffconf.XXXXXXXX" 2> /dev/null) ||
3890     die "Unable to create temporary directory in $TMPDIR."
3891
3892 tmpfile(){
3893     tmp="${FFTMPDIR}/test"$2
3894     (set -C; exec > $tmp) 2> /dev/null ||
3895         die "Unable to create temporary file in $FFTMPDIR."
3896     eval $1=$tmp
3897 }
3898
3899 trap 'rm -rf -- "$FFTMPDIR"' EXIT
3900 trap 'exit 2' INT
3901
3902 tmpfile TMPASM .asm
3903 tmpfile TMPC   .c
3904 tmpfile TMPCPP .cpp
3905 tmpfile TMPE   $EXESUF
3906 tmpfile TMPH   .h
3907 tmpfile TMPM   .m
3908 tmpfile TMPO   .o
3909 tmpfile TMPS   .S
3910 tmpfile TMPSH  .sh
3911 tmpfile TMPV   .ver
3912
3913 unset -f mktemp
3914
3915 chmod +x $TMPE
3916
3917 # make sure we can execute files in $TMPDIR
3918 cat > $TMPSH 2>> $logfile <<EOF
3919 #! /bin/sh
3920 EOF
3921 chmod +x $TMPSH >> $logfile 2>&1
3922 if ! $TMPSH >> $logfile 2>&1; then
3923     cat <<EOF
3924 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3925 variable to another directory and make sure that it is not mounted noexec.
3926 EOF
3927     die "Sanity test failed."
3928 fi
3929
3930 armasm_flags(){
3931     for flag; do
3932         case $flag in
3933             # Filter out MSVC cl.exe options from cflags that shouldn't
3934             # be passed to gas-preprocessor
3935             -M[TD]*)                                            ;;
3936             *)                  echo $flag                      ;;
3937         esac
3938    done
3939 }
3940
3941 ccc_flags(){
3942     for flag; do
3943         case $flag in
3944             -std=c99)           echo -c99                       ;;
3945             -mcpu=*)            echo -arch ${flag#*=}           ;;
3946             -mieee)             echo -ieee                      ;;
3947             -O*|-fast)          echo $flag                      ;;
3948             -fno-math-errno)    echo -assume nomath_errno       ;;
3949             -g)                 echo -g3                        ;;
3950             -Wall)              echo -msg_enable level2         ;;
3951             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3952             -Wl,*)              echo $flag                      ;;
3953             -f*|-W*)                                            ;;
3954             *)                  echo $flag                      ;;
3955         esac
3956    done
3957 }
3958
3959 cparser_flags(){
3960     for flag; do
3961         case $flag in
3962             -Wno-switch)             echo -Wno-switch-enum ;;
3963             -Wno-format-zero-length) ;;
3964             -Wdisabled-optimization) ;;
3965             -Wno-pointer-sign)       echo -Wno-other ;;
3966             *)                       echo $flag ;;
3967         esac
3968     done
3969 }
3970
3971 msvc_common_flags(){
3972     for flag; do
3973         case $flag in
3974             # In addition to specifying certain flags under the compiler
3975             # specific filters, they must be specified here as well or else the
3976             # generic catch all at the bottom will print the original flag.
3977             -Wall)                ;;
3978             -Wextra)              ;;
3979             -std=c99)             ;;
3980             # Common flags
3981             -fomit-frame-pointer) ;;
3982             -g)                   echo -Z7 ;;
3983             -fno-math-errno)      ;;
3984             -fno-common)          ;;
3985             -fno-signed-zeros)    ;;
3986             -fPIC)                ;;
3987             -mthumb)              ;;
3988             -march=*)             ;;
3989             -lz)                  echo zlib.lib ;;
3990             -lx264)               echo libx264.lib ;;
3991             -lstdc++)             ;;
3992             -l*)                  echo ${flag#-l}.lib ;;
3993             -LARGEADDRESSAWARE)   echo $flag ;;
3994             -L*)                  echo -libpath:${flag#-L} ;;
3995             *)                    echo $flag ;;
3996         esac
3997     done
3998 }
3999
4000 msvc_flags(){
4001     msvc_common_flags "$@"
4002     for flag; do
4003         case $flag in
4004             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
4005                                        -wd4554 ;;
4006             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
4007                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
4008                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
4009                                        -wd4307 \
4010                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
4011         esac
4012     done
4013 }
4014
4015 icl_flags(){
4016     msvc_common_flags "$@"
4017     for flag; do
4018         case $flag in
4019             # Despite what Intel's documentation says -Wall, which is supported
4020             # on Windows, does enable remarks so disable them here.
4021             -Wall)                echo $flag -Qdiag-disable:remark ;;
4022             -std=c99)             echo -Qstd=c99 ;;
4023             -flto)                echo -ipo ;;
4024         esac
4025     done
4026 }
4027
4028 icc_flags(){
4029     for flag; do
4030         case $flag in
4031             -flto)                echo -ipo ;;
4032             *)                    echo $flag ;;
4033         esac
4034     done
4035 }
4036
4037 pgi_flags(){
4038     for flag; do
4039         case $flag in
4040             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
4041             -fomit-frame-pointer) echo -Mnoframe ;;
4042             -g)                   echo -gopt ;;
4043             *)                    echo $flag ;;
4044         esac
4045     done
4046 }
4047
4048 suncc_flags(){
4049     for flag; do
4050         case $flag in
4051             -march=*|-mcpu=*)
4052                 case "${flag#*=}" in
4053                     native)                   echo -xtarget=native       ;;
4054                     v9|niagara)               echo -xarch=sparc          ;;
4055                     ultrasparc)               echo -xarch=sparcvis       ;;
4056                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
4057                     i586|pentium)             echo -xchip=pentium        ;;
4058                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
4059                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
4060                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
4061                     pentium4*)          echo -xtarget=pentium4           ;;
4062                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
4063                     *-sse3)             echo -xarch=sse3                 ;;
4064                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
4065                     bonnell)                   echo -xarch=ssse3         ;;
4066                     corei7|nehalem)            echo -xtarget=nehalem     ;;
4067                     westmere)                  echo -xtarget=westmere    ;;
4068                     silvermont)                echo -xarch=sse4_2        ;;
4069                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
4070                     core-avx*|ivybridge|haswell|broadwell|skylake*|knl)
4071                                                echo -xarch=avx           ;;
4072                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
4073                     btver1)                    echo -xarch=amdsse4a      ;;
4074                     btver2|bdver*|znver*)      echo -xarch=avx           ;;
4075                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
4076                     k8|opteron|athlon64|athlon-fx)
4077                                                echo -xarch=sse2a         ;;
4078                     athlon*)                   echo -xarch=pentium_proa  ;;
4079                 esac
4080                 ;;
4081             -std=c99)             echo -xc99              ;;
4082             -fomit-frame-pointer) echo -xregs=frameptr    ;;
4083             -fPIC)                echo -KPIC -xcode=pic32 ;;
4084             -W*,*)                echo $flag              ;;
4085             -f*-*|-W*|-mimpure-text)                      ;;
4086             -shared)              echo -G                 ;;
4087             *)                    echo $flag              ;;
4088         esac
4089     done
4090 }
4091
4092 tms470_flags(){
4093     for flag; do
4094         case $flag in
4095             -march=*|-mcpu=*)
4096                 case "${flag#*=}" in
4097                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
4098                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
4099                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
4100                     armv6*|arm11*)          echo -mv=6   ;;
4101                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
4102                                             echo -mv=5e  ;;
4103                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
4104                 esac
4105                 ;;
4106             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
4107             -mfpu=vfp)      echo --float_support=vfpv2        ;;
4108             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
4109             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
4110             -msoft-float)   echo --float_support=vfplib       ;;
4111             -O[0-3]|-mf=*)  echo $flag                        ;;
4112             -g)             echo -g -mn                       ;;
4113             -pds=*)         echo $flag                        ;;
4114             -D*|-I*)        echo $flag                        ;;
4115             --gcc|--abi=*)  echo $flag                        ;;
4116             -me)            echo $flag                        ;;
4117         esac
4118     done
4119 }
4120
4121 probe_cc(){
4122     pfx=$1
4123     _cc=$2
4124     first=$3
4125
4126     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
4127     unset _ld_o _ldflags _ld_lib _ld_path
4128     unset _depflags _DEPCMD _DEPFLAGS
4129     _flags_filter=echo
4130
4131     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
4132         true # no-op to avoid reading stdin in following checks
4133     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
4134         _type=llvm_gcc
4135         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
4136         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
4137         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4138         _cflags_speed='-O3'
4139         _cflags_size='-Os'
4140     elif $_cc -v 2>&1 | grep -qi ^gcc; then
4141         _type=gcc
4142         gcc_version=$($_cc --version | head -n1)
4143         gcc_basever=$($_cc -dumpversion)
4144         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
4145         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
4146         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
4147         case $gcc_basever in
4148             2) ;;
4149             2.*) ;;
4150             *) _depflags='-MMD -MF $(@:.o=.d) -MT $@' ;;
4151         esac
4152         if [ "$first" = true ]; then
4153             case $gcc_basever in
4154                 4.2*)
4155                 warn "gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler." ;;
4156             esac
4157         fi
4158         _cflags_speed='-O3'
4159         _cflags_size='-Os'
4160     elif $_cc --version 2>/dev/null | grep -q ^icc; then
4161         _type=icc
4162         _ident=$($_cc --version | head -n1)
4163         _depflags='-MMD'
4164         _cflags_speed='-O3'
4165         _cflags_size='-Os'
4166         _cflags_noopt='-O1'
4167         _flags_filter=icc_flags
4168     elif $_cc -v 2>&1 | grep -q xlc; then
4169         _type=xlc
4170         _ident=$($_cc -qversion 2>/dev/null | head -n1)
4171         _cflags_speed='-O5'
4172         _cflags_size='-O5 -qcompact'
4173     elif $_cc -V 2>/dev/null | grep -q Compaq; then
4174         _type=ccc
4175         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
4176         _DEPFLAGS='-M'
4177         _cflags_speed='-fast'
4178         _cflags_size='-O1'
4179         _flags_filter=ccc_flags
4180     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
4181         test -d "$sysroot" || die "No valid sysroot specified."
4182         _type=armcc
4183         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
4184         armcc_conf="$PWD/armcc.conf"
4185         $_cc --arm_linux_configure                 \
4186              --arm_linux_config_file="$armcc_conf" \
4187              --configure_sysroot="$sysroot"        \
4188              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
4189              die "Error creating armcc configuration file."
4190         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
4191         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
4192         as_default="${cross_prefix}gcc"
4193         _depflags='-MMD'
4194         _cflags_speed='-O3'
4195         _cflags_size='-Os'
4196     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
4197         _type=tms470
4198         _ident=$($_cc -version | head -n1 | tr -s ' ')
4199         _flags='--gcc --abi=eabi -me'
4200         _cc_e='-ppl -fe=$@'
4201         _cc_o='-fe=$@'
4202         _depflags='-ppa -ppd=$(@:.o=.d)'
4203         _cflags_speed='-O3 -mf=5'
4204         _cflags_size='-O3 -mf=2'
4205         _flags_filter=tms470_flags
4206     elif $_cc -v 2>&1 | grep -q clang; then
4207         _type=clang
4208         _ident=$($_cc --version 2>/dev/null | head -n1)
4209         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4210         _cflags_speed='-O3'
4211         _cflags_size='-Oz'
4212     elif $_cc -V 2>&1 | grep -q Sun; then
4213         _type=suncc
4214         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
4215         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
4216         _DEPFLAGS='-xM1 -xc99'
4217         _ldflags='-std=c99'
4218         _cflags_speed='-O5'
4219         _cflags_size='-O5 -xspace'
4220         _flags_filter=suncc_flags
4221     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
4222         _type=pathscale
4223         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
4224         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4225         _cflags_speed='-O2'
4226         _cflags_size='-Os'
4227         _flags_filter='filter_out -Wdisabled-optimization'
4228     elif $_cc -v 2>&1 | grep -q Open64; then
4229         _type=open64
4230         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
4231         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4232         _cflags_speed='-O2'
4233         _cflags_size='-Os'
4234         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
4235     elif $_cc -V 2>&1 | grep -q Portland; then
4236         _type=pgi
4237         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
4238         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
4239         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
4240         _cflags_size="-O2 -Munroll=c:1 $opt_common"
4241         _cflags_noopt="-O"
4242         _flags_filter=pgi_flags
4243     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
4244         _type=armasm
4245         _ident=$($_cc | head -n1)
4246         # 4509: "This form of conditional instruction is deprecated"
4247         _flags="-nologo -ignore 4509"
4248         _flags_filter=armasm_flags
4249     elif $_cc 2>&1 | grep -q Intel; then
4250         _type=icl
4251         _ident=$($_cc 2>&1 | head -n1)
4252         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
4253         # Not only is O3 broken on 13.x+ but it is slower on all previous
4254         # versions (tested) as well.
4255         _cflags_speed="-O2"
4256         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
4257         if $_cc 2>&1 | grep -q Linker; then
4258             _ld_o='-out:$@'
4259         else
4260             _ld_o='-Fe$@'
4261         fi
4262         _cc_o='-Fo$@'
4263         _cc_e='-P'
4264         _flags_filter=icl_flags
4265         _ld_lib='lib%.a'
4266         _ld_path='-libpath:'
4267         # -Qdiag-error to make icl error when seeing certain unknown arguments
4268         _flags='-nologo -Qdiag-error:4044,10157'
4269         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
4270         # with MSVC which enables it by default.
4271         _cflags='-Qms0 -Qvec- -Qsimd- -GS -fp:precise'
4272         disable stripping
4273     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
4274         # lld can emulate multiple different linkers; in ms link.exe mode,
4275         # the -? parameter gives the help output which contains an identifyable
4276         # string, while it gives an error in other modes.
4277         _type=lld-link
4278         # The link.exe mode doesn't have a switch for getting the version,
4279         # but we can force it back to gnu mode and get the version from there.
4280         _ident=$($_cc -flavor gnu --version 2>/dev/null)
4281         _ld_o='-out:$@'
4282         _flags_filter=msvc_flags
4283         _ld_lib='lib%.a'
4284         _ld_path='-libpath:'
4285     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
4286         _type=msvc
4287         _ident=$($_cc 2>&1 | head -n1)
4288         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
4289         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
4290         _cflags_speed="-O2"
4291         _cflags_size="-O1"
4292         _cflags_noopt="-O1"
4293         if $_cc -nologo- 2>&1 | grep -q Linker; then
4294             _ld_o='-out:$@'
4295         else
4296             _ld_o='-Fe$@'
4297         fi
4298         _cc_o='-Fo$@'
4299         _cc_e='-P -Fi$@'
4300         _flags_filter=msvc_flags
4301         _ld_lib='lib%.a'
4302         _ld_path='-libpath:'
4303         _flags='-nologo'
4304         disable stripping
4305     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
4306         _type=cparser
4307         _ident=$($_cc --version | head -n1)
4308         _depflags='-MMD'
4309         _cflags_speed='-O4'
4310         _cflags_size='-O2'
4311         _flags_filter=cparser_flags
4312     fi
4313
4314     eval ${pfx}_type=\$_type
4315     eval ${pfx}_ident=\$_ident
4316 }
4317
4318 set_ccvars(){
4319     eval ${1}_C=\${_cc_c-\${${1}_C}}
4320     eval ${1}_E=\${_cc_e-\${${1}_E}}
4321     eval ${1}_O=\${_cc_o-\${${1}_O}}
4322
4323     if [ -n "$_depflags" ]; then
4324         eval ${1}_DEPFLAGS=\$_depflags
4325     else
4326         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
4327         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
4328         eval DEP${1}FLAGS=\$_flags
4329     fi
4330 }
4331
4332 probe_cc cc "$cc" "true"
4333 cflags_filter=$_flags_filter
4334 cflags_speed=$_cflags_speed
4335 cflags_size=$_cflags_size
4336 cflags_noopt=$_cflags_noopt
4337 add_cflags $_flags $_cflags
4338 cc_ldflags=$_ldflags
4339 set_ccvars CC
4340 set_ccvars CXX
4341
4342 probe_cc hostcc "$host_cc"
4343 host_cflags_filter=$_flags_filter
4344 host_cflags_speed=$_cflags_speed
4345 add_host_cflags  $_flags $_cflags
4346 set_ccvars HOSTCC
4347
4348 test -n "$cc_type" && enable $cc_type ||
4349     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
4350
4351 : ${as_default:=$cc}
4352 : ${objcc_default:=$cc}
4353 : ${dep_cc_default:=$cc}
4354 : ${ld_default:=$cc}
4355 : ${host_ld_default:=$host_cc}
4356 set_default ar as objcc dep_cc ld ln_s host_ld windres
4357
4358 probe_cc as "$as"
4359 asflags_filter=$_flags_filter
4360 add_asflags $_flags $_cflags
4361 set_ccvars AS
4362
4363 probe_cc objcc "$objcc"
4364 objcflags_filter=$_flags_filter
4365 add_objcflags $_flags $_cflags
4366 set_ccvars OBJC
4367
4368 probe_cc ld "$ld"
4369 ldflags_filter=$_flags_filter
4370 add_ldflags $_flags $_ldflags
4371 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
4372 LD_O=${_ld_o-$LD_O}
4373 LD_LIB=${_ld_lib-$LD_LIB}
4374 LD_PATH=${_ld_path-$LD_PATH}
4375
4376 probe_cc hostld "$host_ld"
4377 host_ldflags_filter=$_flags_filter
4378 add_host_ldflags $_flags $_ldflags
4379 HOSTLD_O=${_ld_o-$HOSTLD_O}
4380
4381 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
4382     probe_cc depcc "$dep_cc"
4383     CCDEP=${_DEPCMD:-$DEPCMD}
4384     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
4385     DEPCCFLAGS=$_flags
4386 fi
4387
4388 if $ar 2>&1 | grep -q Microsoft; then
4389     arflags="-nologo"
4390     ar_o='-out:$@'
4391 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
4392     arflags="rq"
4393     ar_o='$@'
4394 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
4395     arflags='-Xany -r -c'
4396     ar_o='$@'
4397 elif $ar 2>&1 | grep -q "\[D\] "; then
4398     arflags="rcD"
4399     ar_o='$@'
4400 else
4401     arflags="rc"
4402     ar_o='$@'
4403 fi
4404
4405 add_cflags $extra_cflags
4406 add_cxxflags $extra_cxxflags
4407 add_objcflags $extra_objcflags
4408 add_asflags $extra_cflags
4409
4410 if test -n "$sysroot"; then
4411     case "$cc_type" in
4412         gcc|llvm_gcc|clang)
4413             add_cppflags --sysroot="$sysroot"
4414             add_ldflags --sysroot="$sysroot"
4415 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
4416             add_cppflags -isysroot "$sysroot"
4417             add_ldflags -isysroot "$sysroot"
4418         ;;
4419         tms470)
4420             add_cppflags -I"$sysinclude"
4421             add_ldflags  --sysroot="$sysroot"
4422         ;;
4423     esac
4424 fi
4425
4426 if test "$cpu" = host; then
4427     enabled cross_compile &&
4428         die "--cpu=host makes no sense when cross-compiling."
4429
4430     case "$cc_type" in
4431         gcc|llvm_gcc)
4432             check_native(){
4433                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4434                 sed -n "/cc1.*$1=/{
4435                             s/.*$1=\\([^ ]*\\).*/\\1/
4436                             p
4437                             q
4438                         }" $TMPE
4439             }
4440             cpu=$(check_native -march || check_native -mcpu)
4441         ;;
4442         clang)
4443             check_native(){
4444                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4445                 sed -n "/cc1.*-target-cpu /{
4446                             s/.*-target-cpu \\([^ ]*\\).*/\\1/
4447                             p
4448                             q
4449                         }" $TMPE
4450             }
4451             cpu=$(check_native -march)
4452         ;;
4453     esac
4454
4455     test "${cpu:-host}" = host &&
4456         die "--cpu=host not supported with compiler $cc"
4457 fi
4458
4459 # Deal with common $arch aliases
4460 case "$arch" in
4461     aarch64|arm64)
4462         arch="aarch64"
4463     ;;
4464     arm*|iPad*|iPhone*)
4465         arch="arm"
4466     ;;
4467     mips*|IP*)
4468         case "$arch" in
4469         *el)
4470             add_cppflags -EL
4471             add_ldflags -EL
4472         ;;
4473         *eb)
4474             add_cppflags -EB
4475             add_ldflags -EB
4476         ;;
4477         esac
4478         arch="mips"
4479     ;;
4480     parisc*|hppa*)
4481         arch="parisc"
4482     ;;
4483     "Power Macintosh"|ppc*|powerpc*)
4484         arch="ppc"
4485     ;;
4486     s390|s390x)
4487         arch="s390"
4488     ;;
4489     sh4|sh)
4490         arch="sh4"
4491     ;;
4492     sun4*|sparc*)
4493         arch="sparc"
4494     ;;
4495     tilegx|tile-gx)
4496         arch="tilegx"
4497     ;;
4498     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
4499         arch="x86"
4500     ;;
4501 esac
4502
4503 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
4504 enable $arch
4505
4506 # Add processor-specific flags
4507 if enabled aarch64; then
4508
4509     case $cpu in
4510         armv*)
4511             cpuflags="-march=$cpu"
4512         ;;
4513         *)
4514             cpuflags="-mcpu=$cpu"
4515         ;;
4516     esac
4517
4518 elif enabled alpha; then
4519
4520     cpuflags="-mcpu=$cpu"
4521
4522 elif enabled arm; then
4523
4524     check_arm_arch() {
4525         check_cpp_condition stddef.h \
4526             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
4527             $cpuflags
4528     }
4529
4530     probe_arm_arch() {
4531         if   check_arm_arch 4;        then echo armv4
4532         elif check_arm_arch 4T;       then echo armv4t
4533         elif check_arm_arch 5;        then echo armv5
4534         elif check_arm_arch 5E;       then echo armv5e
4535         elif check_arm_arch 5T;       then echo armv5t
4536         elif check_arm_arch 5TE;      then echo armv5te
4537         elif check_arm_arch 5TEJ;     then echo armv5te
4538         elif check_arm_arch 6;        then echo armv6
4539         elif check_arm_arch 6J;       then echo armv6j
4540         elif check_arm_arch 6K;       then echo armv6k
4541         elif check_arm_arch 6Z;       then echo armv6z
4542         elif check_arm_arch 6ZK;      then echo armv6zk
4543         elif check_arm_arch 6T2;      then echo armv6t2
4544         elif check_arm_arch 7;        then echo armv7
4545         elif check_arm_arch 7A  7_A;  then echo armv7-a
4546         elif check_arm_arch 7S;       then echo armv7-a
4547         elif check_arm_arch 7R  7_R;  then echo armv7-r
4548         elif check_arm_arch 7M  7_M;  then echo armv7-m
4549         elif check_arm_arch 7EM 7E_M; then echo armv7-m
4550         elif check_arm_arch 8A  8_A;  then echo armv8-a
4551         fi
4552     }
4553
4554     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
4555
4556     case $cpu in
4557         armv*)
4558             cpuflags="-march=$cpu"
4559             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
4560         ;;
4561         *)
4562             cpuflags="-mcpu=$cpu"
4563             case $cpu in
4564                 cortex-a*)                               subarch=armv7a  ;;
4565                 cortex-r*)                               subarch=armv7r  ;;
4566                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
4567                 arm11*)                                  subarch=armv6   ;;
4568                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
4569                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
4570                 *)                             subarch=$(probe_arm_arch) ;;
4571             esac
4572         ;;
4573     esac
4574
4575     case "$subarch" in
4576         armv5t*)    enable fast_clz                ;;
4577         armv[6-8]*)
4578             enable fast_clz
4579             disabled fast_unaligned || enable fast_unaligned
4580             ;;
4581     esac
4582
4583 elif enabled avr32; then
4584
4585     case $cpu in
4586         ap7[02]0[0-2])
4587             subarch="avr32_ap"
4588             cpuflags="-mpart=$cpu"
4589         ;;
4590         ap)
4591             subarch="avr32_ap"
4592             cpuflags="-march=$cpu"
4593         ;;
4594         uc3[ab]*)
4595             subarch="avr32_uc"
4596             cpuflags="-mcpu=$cpu"
4597         ;;
4598         uc)
4599             subarch="avr32_uc"
4600             cpuflags="-march=$cpu"
4601         ;;
4602     esac
4603
4604 elif enabled bfin; then
4605
4606     cpuflags="-mcpu=$cpu"
4607
4608 elif enabled mips; then
4609
4610     cpuflags="-march=$cpu"
4611
4612     if [ "$cpu" != "generic" ]; then
4613         disable mips32r2
4614         disable mips32r5
4615         disable mips64r2
4616         disable mips32r6
4617         disable mips64r6
4618         disable loongson2
4619         disable loongson3
4620
4621         case $cpu in
4622             24kc|24kf*|24kec|34kc|1004kc|24kef*|34kf*|1004kf*|74kc|74kf)
4623                 enable mips32r2
4624                 disable msa
4625             ;;
4626             p5600|i6400|p6600)
4627                 disable mipsdsp
4628                 disable mipsdspr2
4629             ;;
4630             loongson*)
4631                 enable loongson2
4632                 enable loongson3
4633                 enable local_aligned_8 local_aligned_16 local_aligned_32
4634                 enable simd_align_16
4635                 enable fast_64bit
4636                 enable fast_clz
4637                 enable fast_cmov
4638                 enable fast_unaligned
4639                 disable aligned_stack
4640                 disable mipsfpu
4641                 disable mipsdsp
4642                 disable mipsdspr2
4643                 case $cpu in
4644                     loongson3*)
4645                         cpuflags="-march=loongson3a -mhard-float -fno-expensive-optimizations"
4646                     ;;
4647                     loongson2e)
4648                         cpuflags="-march=loongson2e -mhard-float -fno-expensive-optimizations"
4649                     ;;
4650                     loongson2f)
4651                         cpuflags="-march=loongson2f -mhard-float -fno-expensive-optimizations"
4652                     ;;
4653                 esac
4654             ;;
4655             *)
4656                 # Unknown CPU. Disable everything.
4657                 warn "unknown CPU. Disabling all MIPS optimizations."
4658                 disable mipsfpu
4659                 disable mipsdsp
4660                 disable mipsdspr2
4661                 disable msa
4662                 disable mmi
4663             ;;
4664         esac
4665
4666         case $cpu in
4667             24kc)
4668                 disable mipsfpu
4669                 disable mipsdsp
4670                 disable mipsdspr2
4671             ;;
4672             24kf*)
4673                 disable mipsdsp
4674                 disable mipsdspr2
4675             ;;
4676             24kec|34kc|1004kc)
4677                 disable mipsfpu
4678                 disable mipsdspr2
4679             ;;
4680             24kef*|34kf*|1004kf*)
4681                 disable mipsdspr2
4682             ;;
4683             74kc)
4684                 disable mipsfpu
4685             ;;
4686             p5600)
4687                 enable mips32r5
4688                 check_cflags "-mtune=p5600" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops"
4689             ;;
4690             i6400)
4691                 enable mips64r6
4692                 check_cflags "-mtune=i6400 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4693             ;;
4694             p6600)
4695                 enable mips64r6
4696                 check_cflags "-mtune=p6600 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4697             ;;
4698         esac
4699     else
4700         # We do not disable anything. Is up to the user to disable the unwanted features.
4701         warn 'generic cpu selected'
4702     fi
4703
4704 elif enabled ppc; then
4705
4706     disable ldbrx
4707
4708     case $(tolower $cpu) in
4709         601|ppc601|powerpc601)
4710             cpuflags="-mcpu=601"
4711             disable altivec
4712         ;;
4713         603*|ppc603*|powerpc603*)
4714             cpuflags="-mcpu=603"
4715             disable altivec
4716         ;;
4717         604*|ppc604*|powerpc604*)
4718             cpuflags="-mcpu=604"
4719             disable altivec
4720         ;;
4721         g3|75*|ppc75*|powerpc75*)
4722             cpuflags="-mcpu=750"
4723             disable altivec
4724         ;;
4725         g4|745*|ppc745*|powerpc745*)
4726             cpuflags="-mcpu=7450"
4727             disable vsx
4728         ;;
4729         74*|ppc74*|powerpc74*)
4730             cpuflags="-mcpu=7400"
4731             disable vsx
4732         ;;
4733         g5|970|ppc970|powerpc970)
4734             cpuflags="-mcpu=970"
4735             disable vsx
4736         ;;
4737         power[3-6]*)
4738             cpuflags="-mcpu=$cpu"
4739             disable vsx
4740         ;;
4741         power[7-8]*)
4742             cpuflags="-mcpu=$cpu"
4743         ;;
4744         cell)
4745             cpuflags="-mcpu=cell"
4746             enable ldbrx
4747             disable vsx
4748         ;;
4749         e500mc)
4750             cpuflags="-mcpu=e500mc"
4751             disable altivec
4752         ;;
4753         e500v2)
4754             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
4755             disable altivec
4756             disable dcbzl
4757         ;;
4758         e500)
4759             cpuflags="-mcpu=8540 -mhard-float"
4760             disable altivec
4761             disable dcbzl
4762         ;;
4763     esac
4764
4765 elif enabled sparc; then
4766
4767     case $cpu in
4768         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
4769             cpuflags="-mcpu=$cpu"
4770         ;;
4771         ultrasparc*|niagara[234])
4772             cpuflags="-mcpu=$cpu"
4773         ;;
4774     esac
4775
4776 elif enabled x86; then
4777
4778     case $cpu in
4779         i[345]86|pentium)
4780             cpuflags="-march=$cpu"
4781             disable i686
4782             disable mmx
4783         ;;
4784         # targets that do NOT support nopl and conditional mov (cmov)
4785         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
4786             cpuflags="-march=$cpu"
4787             disable i686
4788         ;;
4789         # targets that do support nopl and conditional mov (cmov)
4790         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
4791         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|skylake*|knl\
4792         |amdfam10|barcelona|b[dt]ver*|znver*)
4793             cpuflags="-march=$cpu"
4794             enable i686
4795             enable fast_cmov
4796         ;;
4797         # targets that do support conditional mov but on which it's slow
4798         pentium4|pentium4m|prescott|nocona)
4799             cpuflags="-march=$cpu"
4800             enable i686
4801             disable fast_cmov
4802         ;;
4803     esac
4804
4805 fi
4806
4807 if [ "$cpu" != generic ]; then
4808     add_cflags  $cpuflags
4809     add_asflags $cpuflags
4810     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
4811 fi
4812
4813 # compiler sanity check
4814 check_exec <<EOF
4815 int main(void){ return 0; }
4816 EOF
4817 if test "$?" != 0; then
4818     echo "$cc is unable to create an executable file."
4819     if test -z "$cross_prefix" && ! enabled cross_compile ; then
4820         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
4821         echo "Only do this if you know what cross compiling means."
4822     fi
4823     die "C compiler test failed."
4824 fi
4825
4826 add_cppflags -D_ISOC99_SOURCE
4827 add_cxxflags -D__STDC_CONSTANT_MACROS
4828 check_cxxflags -std=c++11 || check_cxxflags -std=c++0x
4829
4830 # some compilers silently accept -std=c11, so we also need to check that the
4831 # version macro is defined properly
4832 check_cpp_condition ctype.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
4833     add_cflags -std=c11 ||
4834     check_cflags -std=c99
4835
4836 check_cppflags -D_FILE_OFFSET_BITS=64
4837 check_cppflags -D_LARGEFILE_SOURCE
4838
4839 add_host_cppflags -D_ISOC99_SOURCE
4840 check_host_cflags -std=c99
4841 check_host_cflags -Wall
4842 check_host_cflags $host_cflags_speed
4843
4844 check_64bit(){
4845     arch32=$1
4846     arch64=$2
4847     expr=$3
4848     check_code cc "" "int test[2*($expr) - 1]" &&
4849         subarch=$arch64 || subarch=$arch32
4850 }
4851
4852 case "$arch" in
4853     aarch64|alpha|ia64)
4854         spic=$shared
4855     ;;
4856     mips)
4857         check_64bit mips mips64 '_MIPS_SIM > 1'
4858         spic=$shared
4859     ;;
4860     parisc)
4861         check_64bit parisc parisc64 'sizeof(void *) > 4'
4862         spic=$shared
4863     ;;
4864     ppc)
4865         check_64bit ppc ppc64 'sizeof(void *) > 4'
4866         spic=$shared
4867     ;;
4868     s390)
4869         check_64bit s390 s390x 'sizeof(void *) > 4'
4870    &nbs