Revert "Merge commit 'a97563c889fefd81ad6b3758471434d8c2e2e550'"
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # FFmpeg configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN FFMPEG, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken FFmpeg."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-outdevs           show all available output devices
77   --list-filters           show all available filters
78
79 Standard options:
80   --logfile=FILE           log tests and output to FILE [ffbuild/config.log]
81   --disable-logging        do not log configure debug information
82   --fatal-warnings         fail if any configure warning is generated
83   --prefix=PREFIX          install in PREFIX [$prefix_default]
84   --bindir=DIR             install binaries in DIR [PREFIX/bin]
85   --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]
86   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]
87   --libdir=DIR             install libs in DIR [PREFIX/lib]
88   --shlibdir=DIR           install shared libs in DIR [LIBDIR]
89   --incdir=DIR             install includes in DIR [PREFIX/include]
90   --mandir=DIR             install man page in DIR [PREFIX/share/man]
91   --pkgconfigdir=DIR       install pkg-config files in DIR [LIBDIR/pkgconfig]
92   --enable-rpath           use rpath to allow installing libraries in paths
93                            not part of the dynamic linker search path
94                            use rpath when linking programs (USE WITH CARE)
95   --install-name-dir=DIR   Darwin directory name for installed targets
96
97 Licensing options:
98   --enable-gpl             allow use of GPL code, the resulting libs
99                            and binaries will be under GPL [no]
100   --enable-version3        upgrade (L)GPL to version 3 [no]
101   --enable-nonfree         allow use of nonfree code, the resulting libs
102                            and binaries will be unredistributable [no]
103
104 Configuration options:
105   --disable-static         do not build static libraries [no]
106   --enable-shared          build shared libraries [no]
107   --enable-small           optimize for size instead of speed
108   --disable-runtime-cpudetect disable detecting CPU capabilities at runtime (smaller binary)
109   --enable-gray            enable full grayscale support (slower color)
110   --disable-swscale-alpha  disable alpha channel support in swscale
111   --disable-all            disable building components, libraries and programs
112   --disable-autodetect     disable automatically detected external libraries [no]
113
114 Program options:
115   --disable-programs       do not build command line programs
116   --disable-ffmpeg         disable ffmpeg build
117   --disable-ffplay         disable ffplay build
118   --disable-ffprobe        disable ffprobe build
119   --disable-ffserver       disable ffserver build
120
121 Documentation options:
122   --disable-doc            do not build documentation
123   --disable-htmlpages      do not build HTML documentation pages
124   --disable-manpages       do not build man documentation pages
125   --disable-podpages       do not build POD documentation pages
126   --disable-txtpages       do not build text documentation pages
127
128 Component options:
129   --disable-avdevice       disable libavdevice build
130   --disable-avcodec        disable libavcodec build
131   --disable-avformat       disable libavformat build
132   --disable-swresample     disable libswresample build
133   --disable-swscale        disable libswscale build
134   --disable-postproc       disable libpostproc build
135   --disable-avfilter       disable libavfilter build
136   --enable-avresample      enable libavresample build [no]
137   --disable-pthreads       disable pthreads [autodetect]
138   --disable-w32threads     disable Win32 threads [autodetect]
139   --disable-os2threads     disable OS/2 threads [autodetect]
140   --disable-network        disable network support [no]
141   --disable-dct            disable DCT code
142   --disable-dwt            disable DWT code
143   --disable-error-resilience disable error resilience code
144   --disable-lsp            disable LSP code
145   --disable-lzo            disable LZO decoder code
146   --disable-mdct           disable MDCT code
147   --disable-rdft           disable RDFT code
148   --disable-fft            disable FFT code
149   --disable-faan           disable floating point AAN (I)DCT code
150   --disable-pixelutils     disable pixel utils in libavutil
151
152 Individual component options:
153   --disable-everything     disable all components listed below
154   --disable-encoder=NAME   disable encoder NAME
155   --enable-encoder=NAME    enable encoder NAME
156   --disable-encoders       disable all encoders
157   --disable-decoder=NAME   disable decoder NAME
158   --enable-decoder=NAME    enable decoder NAME
159   --disable-decoders       disable all decoders
160   --disable-hwaccel=NAME   disable hwaccel NAME
161   --enable-hwaccel=NAME    enable hwaccel NAME
162   --disable-hwaccels       disable all hwaccels
163   --disable-muxer=NAME     disable muxer NAME
164   --enable-muxer=NAME      enable muxer NAME
165   --disable-muxers         disable all muxers
166   --disable-demuxer=NAME   disable demuxer NAME
167   --enable-demuxer=NAME    enable demuxer NAME
168   --disable-demuxers       disable all demuxers
169   --enable-parser=NAME     enable parser NAME
170   --disable-parser=NAME    disable parser NAME
171   --disable-parsers        disable all parsers
172   --enable-bsf=NAME        enable bitstream filter NAME
173   --disable-bsf=NAME       disable bitstream filter NAME
174   --disable-bsfs           disable all bitstream filters
175   --enable-protocol=NAME   enable protocol NAME
176   --disable-protocol=NAME  disable protocol NAME
177   --disable-protocols      disable all protocols
178   --enable-indev=NAME      enable input device NAME
179   --disable-indev=NAME     disable input device NAME
180   --disable-indevs         disable input devices
181   --enable-outdev=NAME     enable output device NAME
182   --disable-outdev=NAME    disable output device NAME
183   --disable-outdevs        disable output devices
184   --disable-devices        disable all devices
185   --enable-filter=NAME     enable filter NAME
186   --disable-filter=NAME    disable filter NAME
187   --disable-filters        disable all filters
188   --disable-v4l2_m2m       disable V4L2 mem2mem code [autodetect]
189
190 External library support:
191
192   Using any of the following switches will allow FFmpeg to link to the
193   corresponding external library. All the components depending on that library
194   will become enabled, if all their other dependencies are met and they are not
195   explicitly disabled. E.g. --enable-libwavpack will enable linking to
196   libwavpack and allow the libwavpack encoder to be built, unless it is
197   specifically disabled with --disable-encoder=libwavpack.
198
199   Note that only the system libraries are auto-detected. All the other external
200   libraries must be explicitly enabled.
201
202   Also note that the following help text describes the purpose of the libraries
203   themselves, not all their features will necessarily be usable by FFmpeg.
204
205   --disable-alsa           disable ALSA support [autodetect]
206   --disable-appkit         disable Apple AppKit framework [autodetect]
207   --disable-avfoundation   disable Apple AVFoundation framework [autodetect]
208   --enable-avisynth        enable reading of AviSynth script files [no]
209   --disable-bzlib          disable bzlib [autodetect]
210   --disable-coreimage      disable Apple CoreImage framework [autodetect]
211   --enable-chromaprint     enable audio fingerprinting with chromaprint [no]
212   --enable-frei0r          enable frei0r video filtering [no]
213   --enable-gcrypt          enable gcrypt, needed for rtmp(t)e support
214                            if openssl, librtmp or gmp is not used [no]
215   --enable-gmp             enable gmp, needed for rtmp(t)e support
216                            if openssl or librtmp is not used [no]
217   --enable-gnutls          enable gnutls, needed for https support
218                            if openssl is not used [no]
219   --disable-iconv          disable iconv [autodetect]
220   --disable-jack           disable libjack support [autodetect]
221   --enable-jni             enable JNI support [no]
222   --enable-ladspa          enable LADSPA audio filtering [no]
223   --enable-libass          enable libass subtitles rendering,
224                            needed for subtitles and ass filter [no]
225   --enable-libbluray       enable BluRay reading using libbluray [no]
226   --enable-libbs2b         enable bs2b DSP library [no]
227   --enable-libcaca         enable textual display using libcaca [no]
228   --enable-libcelt         enable CELT decoding via libcelt [no]
229   --enable-libcdio         enable audio CD grabbing with libcdio [no]
230   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
231                            and libraw1394 [no]
232   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
233   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
234   --enable-libfontconfig   enable libfontconfig, useful for drawtext filter [no]
235   --enable-libfreetype     enable libfreetype, needed for drawtext filter [no]
236   --enable-libfribidi      enable libfribidi, improves drawtext filter [no]
237   --enable-libgme          enable Game Music Emu via libgme [no]
238   --enable-libgsm          enable GSM de/encoding via libgsm [no]
239   --enable-libiec61883     enable iec61883 via libiec61883 [no]
240   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
241   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
242   --enable-libmodplug      enable ModPlug via libmodplug [no]
243   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
244   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
245   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
246   --enable-libopencv       enable video filtering via libopencv [no]
247   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
248   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
249   --enable-libopenmpt      enable decoding tracked files via libopenmpt [no]
250   --enable-libopus         enable Opus de/encoding via libopus [no]
251   --enable-libpulse        enable Pulseaudio input via libpulse [no]
252   --enable-librsvg         enable SVG rasterization via librsvg [no]
253   --enable-librubberband   enable rubberband needed for rubberband filter [no]
254   --enable-librtmp         enable RTMP[E] support via librtmp [no]
255   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
256   --enable-libsmbclient    enable Samba protocol via libsmbclient [no]
257   --enable-libsnappy       enable Snappy compression, needed for hap encoding [no]
258   --enable-libsoxr         enable Include libsoxr resampling [no]
259   --enable-libspeex        enable Speex de/encoding via libspeex [no]
260   --enable-libssh          enable SFTP protocol via libssh [no]
261   --enable-libtesseract    enable Tesseract, needed for ocr filter [no]
262   --enable-libtheora       enable Theora encoding via libtheora [no]
263   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
264   --enable-libv4l2         enable libv4l2/v4l-utils [no]
265   --enable-libvidstab      enable video stabilization using vid.stab [no]
266   --enable-libvmaf         enable vmaf filter via libvmaf [no]
267   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
268   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
269                            native implementation exists [no]
270   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
271   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
272   --enable-libwebp         enable WebP encoding via libwebp [no]
273   --enable-libx264         enable H.264 encoding via x264 [no]
274   --enable-libx265         enable HEVC encoding via x265 [no]
275   --enable-libxavs         enable AVS encoding via xavs [no]
276   --enable-libxcb          enable X11 grabbing using XCB [autodetect]
277   --enable-libxcb-shm      enable X11 grabbing shm communication [autodetect]
278   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [autodetect]
279   --enable-libxcb-shape    enable X11 grabbing shape rendering [autodetect]
280   --enable-libxvid         enable Xvid encoding via xvidcore,
281                            native MPEG-4/Xvid encoder exists [no]
282   --enable-libxml2         enable XML parsing using the C library libxml2 [no]
283   --enable-libzimg         enable z.lib, needed for zscale filter [no]
284   --enable-libzmq          enable message passing via libzmq [no]
285   --enable-libzvbi         enable teletext support via libzvbi [no]
286   --disable-lzma           disable lzma [autodetect]
287   --enable-decklink        enable Blackmagic DeckLink I/O support [no]
288   --enable-libndi_newtek   enable Newteck NDI I/O support [no]
289   --enable-mediacodec      enable Android MediaCodec support [no]
290   --enable-libmysofa       enable libmysofa, needed for sofalizer filter [no]
291   --enable-openal          enable OpenAL 1.1 capture support [no]
292   --enable-opencl          enable OpenCL code
293   --enable-opengl          enable OpenGL rendering [no]
294   --enable-openssl         enable openssl, needed for https support
295                            if gnutls is not used [no]
296   --disable-sndio          disable sndio support [autodetect]
297   --disable-schannel       disable SChannel SSP, needed for TLS support on
298                            Windows if openssl and gnutls are not used [autodetect]
299   --disable-sdl2           disable sdl2 [autodetect]
300   --disable-securetransport disable Secure Transport, needed for TLS support
301                            on OSX if openssl and gnutls are not used [autodetect]
302   --disable-xlib           disable xlib [autodetect]
303   --disable-zlib           disable zlib [autodetect]
304
305   The following libraries provide various hardware acceleration features:
306   --disable-audiotoolbox   disable Apple AudioToolbox code [autodetect]
307   --disable-cuda           disable dynamically linked Nvidia CUDA code [autodetect]
308   --enable-cuda-sdk        enable CUDA features that require the CUDA SDK [no]
309   --disable-cuvid          disable Nvidia CUVID support [autodetect]
310   --disable-d3d11va        disable Microsoft Direct3D 11 video acceleration code [autodetect]
311   --disable-dxva2          disable Microsoft DirectX 9 video acceleration code [autodetect]
312   --enable-libdrm          enable DRM code (Linux) [no]
313   --enable-libmfx          enable Intel MediaSDK (AKA Quick Sync Video) code via libmfx [no]
314   --enable-libnpp          enable Nvidia Performance Primitives-based code [no]
315   --enable-mmal            enable Broadcom Multi-Media Abstraction Layer (Raspberry Pi) via MMAL [no]
316   --disable-nvenc          disable Nvidia video encoding code [autodetect]
317   --enable-omx             enable OpenMAX IL code [no]
318   --enable-omx-rpi         enable OpenMAX IL code for Raspberry Pi [no]
319   --disable-vaapi          disable Video Acceleration API (mainly Unix/Intel) code [autodetect]
320   --disable-vda            disable Apple Video Decode Acceleration code [autodetect]
321   --disable-vdpau          disable Nvidia Video Decode and Presentation API for Unix code [autodetect]
322   --disable-videotoolbox   disable VideoToolbox code [autodetect]
323
324 Toolchain options:
325   --arch=ARCH              select architecture [$arch]
326   --cpu=CPU                select the minimum required CPU (affects
327                            instruction selection, may crash on older CPUs)
328   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
329   --progs-suffix=SUFFIX    program name suffix []
330   --enable-cross-compile   assume a cross-compiler is used
331   --sysroot=PATH           root of cross-build tree
332   --sysinclude=PATH        location of cross-build system headers
333   --target-os=OS           compiler targets OS [$target_os]
334   --target-exec=CMD        command to run executables on target
335   --target-path=DIR        path to view of build directory on target
336   --target-samples=DIR     path to samples directory on target
337   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
338   --toolchain=NAME         set tool defaults according to NAME
339   --nm=NM                  use nm tool NM [$nm_default]
340   --ar=AR                  use archive tool AR [$ar_default]
341   --as=AS                  use assembler AS [$as_default]
342   --ln_s=LN_S              use symbolic link tool LN_S [$ln_s_default]
343   --strip=STRIP            use strip tool STRIP [$strip_default]
344   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
345   --x86asmexe=EXE          use nasm-compatible assembler EXE [$x86asmexe_default]
346   --cc=CC                  use C compiler CC [$cc_default]
347   --cxx=CXX                use C compiler CXX [$cxx_default]
348   --objcc=OCC              use ObjC compiler OCC [$cc_default]
349   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
350   --nvcc=NVCC              use Nvidia CUDA compiler NVCC [$nvcc_default]
351   --ld=LD                  use linker LD [$ld_default]
352   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
353   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
354   --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
355   --doxygen=DOXYGEN        use DOXYGEN to generate API doc [$doxygen_default]
356   --host-cc=HOSTCC         use host C compiler HOSTCC
357   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
358   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
359   --host-ld=HOSTLD         use host linker HOSTLD
360   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
361   --host-libs=HLIBS        use libs HLIBS when linking for host
362   --host-os=OS             compiler host OS [$target_os]
363   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
364   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
365   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
366   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
367   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
368   --extra-ldlibflags=ELDFLAGS add ELDFLAGS to LDLIBFLAGS [$LDLIBFLAGS]
369   --extra-libs=ELIBS       add ELIBS [$ELIBS]
370   --extra-version=STRING   version string suffix []
371   --optflags=OPTFLAGS      override optimization-related compiler flags
372   --nvccflags=NVCCFLAGS    override nvcc flags [$nvccflags_default]
373   --build-suffix=SUFFIX    library name suffix []
374   --enable-pic             build position-independent code
375   --enable-thumb           compile for Thumb instruction set
376   --enable-lto             use link-time optimization
377   --env="ENV=override"     override the environment variables
378
379 Advanced options (experts only):
380   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
381   --custom-allocator=NAME  use a supported custom allocator
382   --disable-symver         disable symbol versioning
383   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
384   --disable-safe-bitstream-reader
385                            disable buffer boundary checking in bitreaders
386                            (faster, but may crash)
387   --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
388
389 Optimization options (experts only):
390   --disable-asm            disable all assembly optimizations
391   --disable-altivec        disable AltiVec optimizations
392   --disable-vsx            disable VSX optimizations
393   --disable-power8         disable POWER8 optimizations
394   --disable-amd3dnow       disable 3DNow! optimizations
395   --disable-amd3dnowext    disable 3DNow! extended optimizations
396   --disable-mmx            disable MMX optimizations
397   --disable-mmxext         disable MMXEXT optimizations
398   --disable-sse            disable SSE optimizations
399   --disable-sse2           disable SSE2 optimizations
400   --disable-sse3           disable SSE3 optimizations
401   --disable-ssse3          disable SSSE3 optimizations
402   --disable-sse4           disable SSE4 optimizations
403   --disable-sse42          disable SSE4.2 optimizations
404   --disable-avx            disable AVX optimizations
405   --disable-xop            disable XOP optimizations
406   --disable-fma3           disable FMA3 optimizations
407   --disable-fma4           disable FMA4 optimizations
408   --disable-avx2           disable AVX2 optimizations
409   --disable-aesni          disable AESNI optimizations
410   --disable-armv5te        disable armv5te optimizations
411   --disable-armv6          disable armv6 optimizations
412   --disable-armv6t2        disable armv6t2 optimizations
413   --disable-vfp            disable VFP optimizations
414   --disable-neon           disable NEON optimizations
415   --disable-inline-asm     disable use of inline assembly
416   --disable-x86asm         disable use of standalone x86 assembly
417   --disable-mipsdsp        disable MIPS DSP ASE R1 optimizations
418   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
419   --disable-msa            disable MSA optimizations
420   --disable-mipsfpu        disable floating point MIPS optimizations
421   --disable-mmi            disable Loongson SIMD optimizations
422   --disable-fast-unaligned consider unaligned accesses slow
423
424 Developer options (useful when working on FFmpeg itself):
425   --disable-debug          disable debugging symbols
426   --enable-debug=LEVEL     set the debug level [$debuglevel]
427   --disable-optimizations  disable compiler optimizations
428   --enable-extra-warnings  enable more compiler warnings
429   --disable-stripping      disable stripping of executables and shared libraries
430   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
431                            2 causes a slowdown at runtime.
432   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
433   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
434                            leaks and errors, using the specified valgrind binary.
435                            Cannot be combined with --target-exec
436   --enable-ftrapv          Trap arithmetic overflows
437   --samples=PATH           location of test samples for FATE, if not set use
438                            \$FATE_SAMPLES at make invocation time.
439   --enable-neon-clobber-test check NEON registers for clobbering (should be
440                            used only for debugging purposes)
441   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
442                            should be used only for debugging purposes)
443   --enable-random          randomly enable/disable components
444   --disable-random
445   --enable-random=LIST     randomly enable/disable specific components or
446   --disable-random=LIST    component groups. LIST is a comma-separated list
447                            of NAME[:PROB] entries where NAME is a component
448                            (group) and PROB the probability associated with
449                            NAME (default 0.5).
450   --random-seed=VALUE      seed value for --enable/disable-random
451   --disable-valgrind-backtrace do not print a backtrace under Valgrind
452                            (only applies to --disable-optimizations builds)
453   --enable-osfuzz          Enable building fuzzer tool
454   --libfuzzer=PATH         path to libfuzzer
455   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
456                            in the name) of tests whose result is ignored
457   --enable-linux-perf      enable Linux Performance Monitor API
458
459 NOTE: Object files are built at the place where configure is launched.
460 EOF
461   exit 0
462 }
463
464 quotes='""'
465 if test -t 1 && which tput >/dev/null 2>&1; then
466     ncolors=$(tput colors)
467     if test -n "$ncolors" && test $ncolors -ge 8; then
468         bold_color=$(tput bold)
469         warn_color=$(tput setaf 3)
470         error_color=$(tput setaf 1)
471         reset_color=$(tput sgr0)
472     fi
473     # 72 used instead of 80 since that's the default of pr
474     ncols=$(tput cols)
475 fi
476 : ${ncols:=72}
477
478 log(){
479     echo "$@" >> $logfile
480 }
481
482 log_file(){
483     log BEGIN $1
484     pr -n -t $1 >> $logfile
485     log END $1
486 }
487
488 warn(){
489     log "WARNING: $*"
490     WARNINGS="${WARNINGS}WARNING: $*\n"
491 }
492
493 die(){
494     log "$@"
495     echo "$error_color$bold_color$@$reset_color"
496     cat <<EOF
497
498 If you think configure made a mistake, make sure you are using the latest
499 version from Git.  If the latest version fails, report the problem to the
500 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
501 EOF
502     if disabled logging; then
503         cat <<EOF
504 Rerun configure with logging enabled (do not use --disable-logging), and
505 include the log this produces with your report.
506 EOF
507     else
508         cat <<EOF
509 Include the log file "$logfile" produced by configure as this will help
510 solve the problem.
511 EOF
512     fi
513     exit 1
514 }
515
516 # Avoid locale weirdness, besides we really just want to translate ASCII.
517 toupper(){
518     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
519 }
520
521 tolower(){
522     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
523 }
524
525 c_escape(){
526     echo "$*" | sed 's/["\\]/\\\0/g'
527 }
528
529 sh_quote(){
530     v=$(echo "$1" | sed "s/'/'\\\\''/g")
531     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
532     echo "$v"
533 }
534
535 cleanws(){
536     echo "$@" | sed 's/^ *//;s/[[:space:]][[:space:]]*/ /g;s/ *$//'
537 }
538
539 filter(){
540     pat=$1
541     shift
542     for v; do
543         eval "case $v in $pat) printf '%s ' $v ;; esac"
544     done
545 }
546
547 filter_out(){
548     pat=$1
549     shift
550     for v; do
551         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
552     done
553 }
554
555 map(){
556     m=$1
557     shift
558     for v; do eval $m; done
559 }
560
561 add_suffix(){
562     suffix=$1
563     shift
564     for v; do echo ${v}${suffix}; done
565 }
566
567 set_all(){
568     value=$1
569     shift
570     for var in $*; do
571         eval $var=$value
572     done
573 }
574
575 set_weak(){
576     value=$1
577     shift
578     for var; do
579         eval : \${$var:=$value}
580     done
581 }
582
583 sanitize_var_name(){
584     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
585 }
586
587 set_safe(){
588     var=$1
589     shift
590     eval $(sanitize_var_name "$var")='$*'
591 }
592
593 get_safe(){
594     eval echo \$$(sanitize_var_name "$1")
595 }
596
597 pushvar(){
598     for pvar in $*; do
599         eval level=\${${pvar}_level:=0}
600         eval ${pvar}_${level}="\$$pvar"
601         eval ${pvar}_level=$(($level+1))
602     done
603 }
604
605 popvar(){
606     for pvar in $*; do
607         eval level=\${${pvar}_level:-0}
608         test $level = 0 && continue
609         eval level=$(($level-1))
610         eval $pvar="\${${pvar}_${level}}"
611         eval ${pvar}_level=$level
612         eval unset ${pvar}_${level}
613     done
614 }
615
616 request(){
617     for var in $*; do
618         eval ${var}_requested=yes
619         eval $var=
620     done
621 }
622
623 enable(){
624     set_all yes $*
625 }
626
627 disable(){
628     set_all no $*
629 }
630
631 enable_weak(){
632     set_weak yes $*
633 }
634
635 disable_weak(){
636     set_weak no $*
637 }
638
639 enable_safe(){
640     for var; do
641         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
642     done
643 }
644
645 disable_safe(){
646     for var; do
647         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
648     done
649 }
650
651 do_enable_deep(){
652     for var; do
653         enabled $var && continue
654         eval sel="\$${var}_select"
655         eval sgs="\$${var}_suggest"
656         pushvar var sgs
657         enable_deep $sel
658         popvar sgs
659         enable_deep_weak $sgs
660         popvar var
661     done
662 }
663
664 enable_deep(){
665     do_enable_deep $*
666     enable $*
667 }
668
669 enable_deep_weak(){
670     for var; do
671         disabled $var && continue
672         pushvar var
673         do_enable_deep $var
674         popvar var
675         enable_weak $var
676     done
677 }
678
679 requested(){
680     test "${1#!}" = "$1" && op='=' || op=!=
681     eval test "x\$${1#!}_requested" $op "xyes"
682 }
683
684 enabled(){
685     test "${1#!}" = "$1" && op='=' || op=!=
686     eval test "x\$${1#!}" $op "xyes"
687 }
688
689 disabled(){
690     test "${1#!}" = "$1" && op='=' || op=!=
691     eval test "x\$${1#!}" $op "xno"
692 }
693
694 enabled_all(){
695     for opt; do
696         enabled $opt || return 1
697     done
698 }
699
700 disabled_all(){
701     for opt; do
702         disabled $opt || return 1
703     done
704 }
705
706 enabled_any(){
707     for opt; do
708         enabled $opt && return 0
709     done
710 }
711
712 disabled_any(){
713     for opt; do
714         disabled $opt && return 0
715     done
716     return 1
717 }
718
719 set_default(){
720     for opt; do
721         eval : \${$opt:=\$${opt}_default}
722     done
723 }
724
725 is_in(){
726     value=$1
727     shift
728     for var in $*; do
729         [ $var = $value ] && return 0
730     done
731     return 1
732 }
733
734 do_check_deps(){
735     for cfg; do
736         cfg="${cfg#!}"
737         enabled ${cfg}_checking && die "Circular dependency for $cfg."
738         disabled ${cfg}_checking && continue
739         enable ${cfg}_checking
740         append allopts $cfg
741
742         eval dep_all="\$${cfg}_deps"
743         eval dep_any="\$${cfg}_deps_any"
744         eval dep_sel="\$${cfg}_select"
745         eval dep_sgs="\$${cfg}_suggest"
746         eval dep_ifa="\$${cfg}_if"
747         eval dep_ifn="\$${cfg}_if_any"
748
749         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
750         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
751         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
752
753         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
754         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
755         enabled_all  $dep_all || { disable $cfg && requested $cfg && die "ERROR: $cfg requested, but not all dependencies are satisfied: $dep_all"; }
756         enabled_any  $dep_any || { disable $cfg && requested $cfg && die "ERROR: $cfg requested, but not any dependency is satisfied: $dep_any"; }
757         disabled_any $dep_sel && { disable $cfg && requested $cfg && die "ERROR: $cfg requested, but some selected dependency is unsatisfied: $dep_sel"; }
758
759         if enabled $cfg; then
760             enable_deep $dep_sel
761             enable_deep_weak $dep_sgs
762         fi
763
764         disable ${cfg}_checking
765     done
766 }
767
768 check_deps(){
769     unset allopts
770
771     do_check_deps "$@"
772
773     for cfg in $allopts; do
774         enabled $cfg || continue
775         eval dep_extralibs="\$${cfg}_extralibs"
776         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
777     done
778 }
779
780 print_config(){
781     pfx=$1
782     files=$2
783     shift 2
784     map 'eval echo "$v \${$v:-no}"' "$@" |
785     awk "BEGIN { split(\"$files\", files) }
786         {
787             c = \"$pfx\" toupper(\$1);
788             v = \$2;
789             sub(/yes/, 1, v);
790             sub(/no/,  0, v);
791             for (f in files) {
792                 file = files[f];
793                 if (file ~ /\\.h\$/) {
794                     printf(\"#define %s %d\\n\", c, v) >>file;
795                 } else if (file ~ /\\.asm\$/) {
796                     printf(\"%%define %s %d\\n\", c, v) >>file;
797                 } else if (file ~ /\\.mak\$/) {
798                     n = -v ? \"\" : \"!\";
799                     printf(\"%s%s=yes\\n\", n, c) >>file;
800                 } else if (file ~ /\\.texi\$/) {
801                     pre = -v ? \"\" : \"@c \";
802                     yesno = \$2;
803                     c2 = tolower(c);
804                     gsub(/_/, \"-\", c2);
805                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
806                 }
807             }
808         }"
809 }
810
811 print_enabled(){
812     suf=$1
813     shift
814     for v; do
815         enabled $v && printf "%s\n" ${v%$suf}
816     done
817 }
818
819 append(){
820     var=$1
821     shift
822     eval "$var=\"\$$var $*\""
823 }
824
825 prepend(){
826     var=$1
827     shift
828     eval "$var=\"$* \$$var\""
829 }
830
831 unique(){
832     var=$1
833     uniq_list=""
834     for tok in $(eval echo \$$var); do
835         uniq_list="$(filter_out $tok $uniq_list) $tok"
836     done
837     eval "$var=\"${uniq_list}\""
838 }
839
840 add_cppflags(){
841     append CPPFLAGS "$@"
842 }
843
844 add_cflags(){
845     append CFLAGS $($cflags_filter "$@")
846 }
847
848 add_cflags_headers(){
849     append CFLAGS_HEADERS $($cflags_filter "$@")
850 }
851
852 add_cxxflags(){
853     append CXXFLAGS $($cflags_filter "$@")
854 }
855
856 add_asflags(){
857     append ASFLAGS $($asflags_filter "$@")
858 }
859
860 add_objcflags(){
861     append OBJCFLAGS $($objcflags_filter "$@")
862 }
863
864 add_ldflags(){
865     append LDFLAGS $($ldflags_filter "$@")
866 }
867
868 add_ldexeflags(){
869     append LDEXEFLAGS $($ldflags_filter "$@")
870 }
871
872 add_ldlibflags(){
873     append LDLIBFLAGS $($ldflags_filter "$@")
874 }
875
876 add_stripflags(){
877     append ASMSTRIPFLAGS "$@"
878 }
879
880 add_extralibs(){
881     prepend extralibs $($ldflags_filter "$@")
882 }
883
884 add_host_cppflags(){
885     append host_cppflags "$@"
886 }
887
888 add_host_cflags(){
889     append host_cflags $($host_cflags_filter "$@")
890 }
891
892 add_host_ldflags(){
893     append host_ldflags $($host_ldflags_filter "$@")
894 }
895
896 add_compat(){
897     append compat_objs $1
898     shift
899     map 'add_cppflags -D$v' "$@"
900 }
901
902 check_cmd(){
903     log "$@"
904     "$@" >> $logfile 2>&1
905 }
906
907 check_stat(){
908     log check_stat "$@"
909     stat "$1" >> $logfile 2>&1
910 }
911
912 cc_o(){
913     eval printf '%s\\n' $CC_O
914 }
915
916 cc_e(){
917     eval printf '%s\\n' $CC_E
918 }
919
920 check_cc(){
921     log check_cc "$@"
922     cat > $TMPC
923     log_file $TMPC
924     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
925 }
926
927 check_cxx(){
928     log check_cxx "$@"
929     cat > $TMPCPP
930     log_file $TMPCPP
931     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
932 }
933
934 check_objcc(){
935     log check_objcc "$@"
936     cat > $TMPM
937     log_file $TMPM
938     check_cmd $objcc -Werror=missing-prototypes $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPM
939 }
940
941 check_cpp(){
942     log check_cpp "$@"
943     cat > $TMPC
944     log_file $TMPC
945     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
946 }
947
948 as_o(){
949     eval printf '%s\\n' $AS_O
950 }
951
952 check_as(){
953     log check_as "$@"
954     cat > $TMPS
955     log_file $TMPS
956     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
957 }
958
959 check_inline_asm(){
960     log check_inline_asm "$@"
961     name="$1"
962     code="$2"
963     shift 2
964     disable $name
965     check_cc "$@" <<EOF && enable $name
966 void foo(void){ __asm__ volatile($code); }
967 EOF
968 }
969
970 check_inline_asm_flags(){
971     log check_inline_asm_flags "$@"
972     name="$1"
973     code="$2"
974     flags=''
975     shift 2
976     while [ "$1" != "" ]; do
977       append flags $1
978       shift
979     done;
980     disable $name
981     cat > $TMPC <<EOF
982 void foo(void){ __asm__ volatile($code); }
983 EOF
984     log_file $TMPC
985     check_cmd $cc $CPPFLAGS $CFLAGS $flags "$@" $CC_C $(cc_o $TMPO) $TMPC &&
986     enable $name && add_cflags $flags && add_asflags $flags && add_ldflags $flags
987 }
988
989 check_insn(){
990     log check_insn "$@"
991     check_inline_asm ${1}_inline "\"$2\""
992     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
993 }
994
995 check_x86asm(){
996     log check_x86asm "$@"
997     echo "$1" > $TMPS
998     log_file $TMPS
999     shift 1
1000     check_cmd $x86asmexe $X86ASMFLAGS -Werror "$@" -o $TMPO $TMPS
1001 }
1002
1003 ld_o(){
1004     eval printf '%s\\n' $LD_O
1005 }
1006
1007 check_ld(){
1008     log check_ld "$@"
1009     type=$1
1010     shift 1
1011     flags=$(filter_out '-l*|*.so' $@)
1012     libs=$(filter '-l*|*.so' $@)
1013     check_$type $($cflags_filter $flags) || return
1014     flags=$($ldflags_filter $flags)
1015     libs=$($ldflags_filter $libs)
1016     check_cmd $ld $LDFLAGS $LDEXEFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
1017 }
1018
1019 print_include(){
1020     hdr=$1
1021     test "${hdr%.h}" = "${hdr}" &&
1022         echo "#include $hdr"    ||
1023         echo "#include <$hdr>"
1024 }
1025
1026 check_code(){
1027     log check_code "$@"
1028     check=$1
1029     headers=$2
1030     code=$3
1031     shift 3
1032     {
1033         for hdr in $headers; do
1034             print_include $hdr
1035         done
1036         echo "int main(void) { $code; return 0; }"
1037     } | check_$check "$@"
1038 }
1039
1040 check_cppflags(){
1041     log check_cppflags "$@"
1042     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
1043 #include <stdlib.h>
1044 EOF
1045 }
1046
1047 test_cflags(){
1048     log test_cflags "$@"
1049     set -- $($cflags_filter "$@")
1050     check_cc "$@" <<EOF
1051 int x;
1052 EOF
1053 }
1054
1055 check_cflags(){
1056     log check_cflags "$@"
1057     test_cflags "$@" && add_cflags "$@"
1058 }
1059
1060 check_cxxflags(){
1061     log check_cxxflags "$@"
1062     set -- $($cflags_filter "$@")
1063     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
1064 int x;
1065 EOF
1066 }
1067
1068 test_objcflags(){
1069     log test_objcflags "$@"
1070     set -- $($objcflags_filter "$@")
1071     check_objcc "$@" <<EOF
1072 int x;
1073 EOF
1074 }
1075
1076 check_objcflags(){
1077     log check_objcflags "$@"
1078     test_objcflags "$@" && add_objcflags "$@"
1079 }
1080
1081 test_ldflags(){
1082     log test_ldflags "$@"
1083     check_ld "cc" "$@" <<EOF
1084 int main(void){ return 0; }
1085 EOF
1086 }
1087
1088 check_ldflags(){
1089     log check_ldflags "$@"
1090     test_ldflags "$@" && add_ldflags "$@"
1091 }
1092
1093 test_stripflags(){
1094     log test_stripflags "$@"
1095     # call check_cc to get a fresh TMPO
1096     check_cc <<EOF
1097 int main(void) { return 0; }
1098 EOF
1099     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
1100 }
1101
1102 check_stripflags(){
1103     log check_stripflags "$@"
1104     test_stripflags "$@" && add_stripflags "$@"
1105 }
1106
1107 check_header(){
1108     log check_header "$@"
1109     header=$1
1110     shift
1111     disable_safe $header
1112     check_cpp "$@" <<EOF && enable_safe $header
1113 #include <$header>
1114 int x;
1115 EOF
1116 }
1117
1118 check_header_objcc(){
1119     log check_header_objcc "$@"
1120     rm -f -- "$TMPO"
1121     header=$1
1122     shift
1123     disable_safe $header
1124     {
1125        echo "#include <$header>"
1126        echo "int main(void) { return 0; }"
1127     } | check_objcc && check_stat "$TMPO" && enable_safe $header
1128 }
1129
1130 check_apple_framework(){
1131     log check_apple_framework "$@"
1132     framework="$1"
1133     name="$(tolower $framework)"
1134     header="${framework}/${framework}.h"
1135     disable $name
1136     check_header_objcc $header && enable $name && add_extralibs "-framework $framework"
1137 }
1138
1139 check_func(){
1140     log check_func "$@"
1141     func=$1
1142     shift
1143     disable $func
1144     check_ld "cc" "$@" <<EOF && enable $func
1145 extern int $func();
1146 int main(void){ $func(); }
1147 EOF
1148 }
1149
1150 check_complexfunc(){
1151     log check_complexfunc "$@"
1152     func=$1
1153     narg=$2
1154     shift 2
1155     test $narg = 2 && args="f, g" || args="f * I"
1156     disable $func
1157     check_ld "cc" "$@" <<EOF && enable $func
1158 #include <complex.h>
1159 #include <math.h>
1160 float foo(complex float f, complex float g) { return $func($args); }
1161 int main(void){ return (int) foo; }
1162 EOF
1163 }
1164
1165 check_mathfunc(){
1166     log check_mathfunc "$@"
1167     func=$1
1168     narg=$2
1169     shift 2
1170     test $narg = 2 && args="f, g" || args="f"
1171     disable $func
1172     check_ld "cc" "$@" <<EOF && enable $func
1173 #include <math.h>
1174 float foo(float f, float g) { return $func($args); }
1175 int main(void){ return (int) foo; }
1176 EOF
1177 }
1178
1179 check_func_headers(){
1180     log check_func_headers "$@"
1181     headers=$1
1182     funcs=$2
1183     shift 2
1184     {
1185         for hdr in $headers; do
1186             print_include $hdr
1187         done
1188         echo "#include <stdint.h>"
1189         for func in $funcs; do
1190             echo "long check_$func(void) { return (long) $func; }"
1191         done
1192         echo "int main(void) { int ret = 0;"
1193         # LTO could optimize out the test functions without this
1194         for func in $funcs; do
1195             echo " ret |= ((intptr_t)check_$func) & 0xFFFF;"
1196         done
1197         echo "return ret; }"
1198     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
1199 }
1200
1201 check_class_headers_cpp(){
1202     log check_class_headers_cpp "$@"
1203     headers=$1
1204     classes=$2
1205     shift 2
1206     {
1207         for hdr in $headers; do
1208             echo "#include <$hdr>"
1209         done
1210         echo "int main(void) { "
1211         i=1
1212         for class in $classes; do
1213             echo "$class obj$i;"
1214             i=$(expr $i + 1)
1215         done
1216         echo "return 0; }"
1217     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
1218 }
1219
1220 check_cpp_condition(){
1221     log check_cpp_condition "$@"
1222     header=$1
1223     condition=$2
1224     shift 2
1225     check_cpp "$@" <<EOF
1226 #include <$header>
1227 #if !($condition)
1228 #error "unsatisfied condition: $condition"
1229 #endif
1230 EOF
1231 }
1232
1233 test_cflags_cc(){
1234     log test_cflags_cc "$@"
1235     flags=$1
1236     header=$2
1237     condition=$3
1238     shift 3
1239     set -- $($cflags_filter "$flags")
1240     check_cc "$@" <<EOF
1241 #include <$header>
1242 #if !($condition)
1243 #error "unsatisfied condition: $condition"
1244 #endif
1245 EOF
1246 }
1247
1248 check_lib(){
1249     log check_lib "$@"
1250     name="$1"
1251     headers="$2"
1252     funcs="$3"
1253     shift 3
1254     disable $name
1255     check_func_headers "$headers" "$funcs" "$@" &&
1256         enable $name && add_extralibs "$@"
1257 }
1258
1259 check_lib_cpp(){
1260     log check_lib_cpp "$@"
1261     headers="$1"
1262     classes="$2"
1263     shift 2
1264     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1265 }
1266
1267 check_pkg_config(){
1268     log check_pkg_config "$@"
1269     pkg_version="$1"
1270     pkg="${1%% *}"
1271     headers="$2"
1272     funcs="$3"
1273     shift 3
1274     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1275     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1276     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1277     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1278         set_safe "${pkg}_cflags"    $pkg_cflags &&
1279         set_safe "${pkg}_extralibs" $pkg_libs
1280 }
1281
1282 check_exec(){
1283     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1284 }
1285
1286 check_exec_crash(){
1287     log check_exec_crash "$@"
1288     code=$(cat)
1289
1290     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1291     # are safe but may not be available everywhere.  Thus we use
1292     # raise(SIGTERM) instead.  The check is run in a subshell so we
1293     # can redirect the "Terminated" message from the shell.  SIGBUS
1294     # is not defined by standard C so it is used conditionally.
1295
1296     (check_exec "$@") >> $logfile 2>&1 <<EOF
1297 #include <signal.h>
1298 static void sighandler(int sig){
1299     raise(SIGTERM);
1300 }
1301 int foo(void){
1302     $code
1303 }
1304 int (*func_ptr)(void) = foo;
1305 int main(void){
1306     signal(SIGILL, sighandler);
1307     signal(SIGFPE, sighandler);
1308     signal(SIGSEGV, sighandler);
1309 #ifdef SIGBUS
1310     signal(SIGBUS, sighandler);
1311 #endif
1312     return func_ptr();
1313 }
1314 EOF
1315 }
1316
1317 check_type(){
1318     log check_type "$@"
1319     headers=$1
1320     type=$2
1321     shift 2
1322     disable_safe "$type"
1323     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1324 }
1325
1326 check_struct(){
1327     log check_struct "$@"
1328     headers=$1
1329     struct=$2
1330     member=$3
1331     shift 3
1332     disable_safe "${struct}_${member}"
1333     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1334         enable_safe "${struct}_${member}"
1335 }
1336
1337 check_builtin(){
1338     log check_builtin "$@"
1339     name=$1
1340     headers=$2
1341     builtin=$3
1342     shift 3
1343     disable "$name"
1344     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1345 }
1346
1347 check_compile_assert(){
1348     log check_compile_assert "$@"
1349     name=$1
1350     headers=$2
1351     condition=$3
1352     shift 3
1353     disable "$name"
1354     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1355 }
1356
1357 require(){
1358     log require "$@"
1359     name_version="$1"
1360     name="${1%% *}"
1361     headers="$2"
1362     func="$3"
1363     shift 3
1364     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1365 }
1366
1367 require_cpp(){
1368     name="$1"
1369     headers="$2"
1370     classes="$3"
1371     shift 3
1372     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1373 }
1374
1375 require_header(){
1376     log require "$@"
1377     header="$1"
1378     shift
1379     check_header "$header" "$@" || die "ERROR: $header header not found"
1380 }
1381
1382 require_cpp_condition(){
1383     log require "$@"
1384     header="$1"
1385     condition="$2"
1386     shift 2
1387     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1388 }
1389
1390 use_pkg_config(){
1391     log use_pkg_config "$@"
1392     pkg="$1"
1393     check_pkg_config "$@" || return 1
1394     add_cflags    $(get_safe "${pkg}_cflags")
1395     add_extralibs $(get_safe "${pkg}_extralibs")
1396 }
1397
1398 require_pkg_config(){
1399     use_pkg_config "$@" || die "ERROR: $pkg not found using pkg-config$pkg_config_fail_message"
1400 }
1401
1402 hostcc_e(){
1403     eval printf '%s\\n' $HOSTCC_E
1404 }
1405
1406 hostcc_o(){
1407     eval printf '%s\\n' $HOSTCC_O
1408 }
1409
1410 check_host_cc(){
1411     log check_host_cc "$@"
1412     cat > $TMPC
1413     log_file $TMPC
1414     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1415 }
1416
1417 check_host_cpp(){
1418     log check_host_cpp "$@"
1419     cat > $TMPC
1420     log_file $TMPC
1421     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1422 }
1423
1424 check_host_cppflags(){
1425     log check_host_cppflags "$@"
1426     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1427 #include <stdlib.h>
1428 EOF
1429 }
1430
1431 check_host_cflags(){
1432     log check_host_cflags "$@"
1433     set -- $($host_cflags_filter "$@")
1434     check_host_cc "$@" <<EOF && append host_cflags "$@"
1435 int x;
1436 EOF
1437 }
1438
1439 check_host_cpp_condition(){
1440     log check_host_cpp_condition "$@"
1441     header=$1
1442     condition=$2
1443     shift 2
1444     check_host_cpp "$@" <<EOF
1445 #include <$header>
1446 #if !($condition)
1447 #error "unsatisfied condition: $condition"
1448 #endif
1449 EOF
1450 }
1451
1452 cp_if_changed(){
1453     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1454     mkdir -p "$(dirname $2)"
1455     cp -f "$1" "$2"
1456 }
1457
1458 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1459 # system-dependent things.
1460
1461 AVCODEC_COMPONENTS="
1462     bsfs
1463     decoders
1464     encoders
1465     hwaccels
1466     parsers
1467 "
1468
1469 AVDEVICE_COMPONENTS="
1470     indevs
1471     outdevs
1472 "
1473
1474 AVFILTER_COMPONENTS="
1475     filters
1476 "
1477
1478 AVFORMAT_COMPONENTS="
1479     demuxers
1480     muxers
1481     protocols
1482 "
1483
1484 AVRESAMPLE_COMPONENTS=""
1485
1486 AVUTIL_COMPONENTS=""
1487
1488 COMPONENT_LIST="
1489     $AVCODEC_COMPONENTS
1490     $AVDEVICE_COMPONENTS
1491     $AVFILTER_COMPONENTS
1492     $AVFORMAT_COMPONENTS
1493     $AVRESAMPLE_COMPONENTS
1494     $AVUTIL_COMPONENTS
1495 "
1496
1497 EXAMPLE_LIST="
1498     avio_dir_cmd_example
1499     avio_reading_example
1500     decode_audio_example
1501     decode_video_example
1502     demuxing_decoding_example
1503     encode_audio_example
1504     encode_video_example
1505     extract_mvs_example
1506     filter_audio_example
1507     filtering_audio_example
1508     filtering_video_example
1509     http_multiclient_example
1510     hw_decode_example
1511     metadata_example
1512     muxing_example
1513     qsvdec_example
1514     remuxing_example
1515     resampling_audio_example
1516     scaling_video_example
1517     transcode_aac_example
1518     transcoding_example
1519 "
1520
1521 EXTERNAL_AUTODETECT_LIBRARY_LIST="
1522     alsa
1523     appkit
1524     avfoundation
1525     bzlib
1526     coreimage
1527     iconv
1528     jack
1529     libxcb
1530     libxcb_shm
1531     libxcb_shape
1532     libxcb_xfixes
1533     lzma
1534     schannel
1535     sdl2
1536     securetransport
1537     sndio
1538     xlib
1539     zlib
1540 "
1541
1542 EXTERNAL_LIBRARY_GPL_LIST="
1543     avisynth
1544     frei0r
1545     libcdio
1546     librubberband
1547     libvidstab
1548     libx264
1549     libx265
1550     libxavs
1551     libxvid
1552 "
1553
1554 EXTERNAL_LIBRARY_NONFREE_LIST="
1555     decklink
1556     libndi_newtek
1557     libfdk_aac
1558     openssl
1559 "
1560
1561 EXTERNAL_LIBRARY_VERSION3_LIST="
1562     gmp
1563     libopencore_amrnb
1564     libopencore_amrwb
1565     libvo_amrwbenc
1566 "
1567
1568 EXTERNAL_LIBRARY_GPLV3_LIST="
1569     libsmbclient
1570 "
1571
1572 EXTERNAL_LIBRARY_LIST="
1573     $EXTERNAL_AUTODETECT_LIBRARY_LIST
1574     $EXTERNAL_LIBRARY_GPL_LIST
1575     $EXTERNAL_LIBRARY_NONFREE_LIST
1576     $EXTERNAL_LIBRARY_VERSION3_LIST
1577     $EXTERNAL_LIBRARY_GPLV3_LIST
1578     chromaprint
1579     gcrypt
1580     gnutls
1581     jni
1582     ladspa
1583     libass
1584     libbluray
1585     libbs2b
1586     libcaca
1587     libcelt
1588     libdc1394
1589     libdrm
1590     libflite
1591     libfontconfig
1592     libfreetype
1593     libfribidi
1594     libgme
1595     libgsm
1596     libiec61883
1597     libilbc
1598     libkvazaar
1599     libmodplug
1600     libmp3lame
1601     libmysofa
1602     libopencv
1603     libopenh264
1604     libopenjpeg
1605     libopenmpt
1606     libopus
1607     libpulse
1608     librsvg
1609     librtmp
1610     libshine
1611     libsmbclient
1612     libsnappy
1613     libsoxr
1614     libspeex
1615     libssh
1616     libtesseract
1617     libtheora
1618     libtwolame
1619     libv4l2
1620     libvmaf
1621     libvorbis
1622     libvpx
1623     libwavpack
1624     libwebp
1625     libxml2
1626     libzimg
1627     libzmq
1628     libzvbi
1629     mediacodec
1630     openal
1631     opencl
1632     opengl
1633 "
1634
1635 HWACCEL_AUTODETECT_LIBRARY_LIST="
1636     audiotoolbox
1637     crystalhd
1638     cuda
1639     cuvid
1640     d3d11va
1641     dxva2
1642     nvenc
1643     vaapi
1644     vda
1645     vdpau
1646     videotoolbox
1647     v4l2_m2m
1648     xvmc
1649 "
1650
1651 HWACCEL_LIBRARY_NONFREE_LIST="
1652     cuda_sdk
1653     libnpp
1654 "
1655
1656 HWACCEL_LIBRARY_LIST="
1657     $HWACCEL_AUTODETECT_LIBRARY_LIST
1658     $HWACCEL_LIBRARY_NONFREE_LIST
1659     libmfx
1660     mmal
1661     omx
1662 "
1663
1664 DOCUMENT_LIST="
1665     doc
1666     htmlpages
1667     manpages
1668     podpages
1669     txtpages
1670 "
1671
1672 FEATURE_LIST="
1673     ftrapv
1674     gray
1675     hardcoded_tables
1676     omx_rpi
1677     runtime_cpudetect
1678     safe_bitstream_reader
1679     shared
1680     small
1681     static
1682     swscale_alpha
1683 "
1684
1685 LIBRARY_LIST="
1686     avcodec
1687     avdevice
1688     avfilter
1689     avformat
1690     avresample
1691     avutil
1692     postproc
1693     swresample
1694     swscale
1695 "
1696
1697 LICENSE_LIST="
1698     gpl
1699     nonfree
1700     version3
1701 "
1702
1703 PROGRAM_LIST="
1704     ffplay
1705     ffprobe
1706     ffserver
1707     ffmpeg
1708 "
1709
1710 SUBSYSTEM_LIST="
1711     dct
1712     dwt
1713     error_resilience
1714     faan
1715     fast_unaligned
1716     fft
1717     lsp
1718     lzo
1719     mdct
1720     pixelutils
1721     network
1722     rdft
1723 "
1724
1725 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1726 CONFIG_LIST="
1727     $DOCUMENT_LIST
1728     $EXAMPLE_LIST
1729     $EXTERNAL_LIBRARY_LIST
1730     $HWACCEL_LIBRARY_LIST
1731     $FEATURE_LIST
1732     $LICENSE_LIST
1733     $LIBRARY_LIST
1734     $PROGRAM_LIST
1735     $SUBSYSTEM_LIST
1736     autodetect
1737     fontconfig
1738     linux_perf
1739     memory_poisoning
1740     neon_clobber_test
1741     ossfuzz
1742     pic
1743     thumb
1744     valgrind_backtrace
1745     xmm_clobber_test
1746     $COMPONENT_LIST
1747 "
1748
1749 THREADS_LIST="
1750     pthreads
1751     os2threads
1752     w32threads
1753 "
1754
1755 ATOMICS_LIST="
1756     atomics_gcc
1757     atomics_suncc
1758     atomics_win32
1759 "
1760
1761 AUTODETECT_LIBS="
1762     $EXTERNAL_AUTODETECT_LIBRARY_LIST
1763     $HWACCEL_AUTODETECT_LIBRARY_LIST
1764     $THREADS_LIST
1765 "
1766
1767 ARCH_LIST="
1768     aarch64
1769     alpha
1770     arm
1771     avr32
1772     avr32_ap
1773     avr32_uc
1774     bfin
1775     ia64
1776     m68k
1777     mips
1778     mips64
1779     parisc
1780     ppc
1781     ppc64
1782     s390
1783     sh4
1784     sparc
1785     sparc64
1786     tilegx
1787     tilepro
1788     tomi
1789     x86
1790     x86_32
1791     x86_64
1792 "
1793
1794 ARCH_EXT_LIST_ARM="
1795     armv5te
1796     armv6
1797     armv6t2
1798     armv8
1799     neon
1800     vfp
1801     vfpv3
1802     setend
1803 "
1804
1805 ARCH_EXT_LIST_MIPS="
1806     mipsfpu
1807     mips32r2
1808     mips32r5
1809     mips64r2
1810     mips32r6
1811     mips64r6
1812     mipsdsp
1813     mipsdspr2
1814     msa
1815 "
1816
1817 ARCH_EXT_LIST_LOONGSON="
1818     loongson2
1819     loongson3
1820     mmi
1821 "
1822
1823 ARCH_EXT_LIST_X86_SIMD="
1824     aesni
1825     amd3dnow
1826     amd3dnowext
1827     avx
1828     avx2
1829     fma3
1830     fma4
1831     mmx
1832     mmxext
1833     sse
1834     sse2
1835     sse3
1836     sse4
1837     sse42
1838     ssse3
1839     xop
1840 "
1841
1842 ARCH_EXT_LIST_PPC="
1843     altivec
1844     dcbzl
1845     ldbrx
1846     power8
1847     ppc4xx
1848     vsx
1849 "
1850
1851 ARCH_EXT_LIST_X86="
1852     $ARCH_EXT_LIST_X86_SIMD
1853     cpunop
1854     i686
1855 "
1856
1857 ARCH_EXT_LIST="
1858     $ARCH_EXT_LIST_ARM
1859     $ARCH_EXT_LIST_PPC
1860     $ARCH_EXT_LIST_X86
1861     $ARCH_EXT_LIST_MIPS
1862     $ARCH_EXT_LIST_LOONGSON
1863 "
1864
1865 ARCH_FEATURES="
1866     aligned_stack
1867     fast_64bit
1868     fast_clz
1869     fast_cmov
1870     local_aligned_8
1871     local_aligned_16
1872     local_aligned_32
1873     simd_align_16
1874     simd_align_32
1875 "
1876
1877 BUILTIN_LIST="
1878     atomic_cas_ptr
1879     machine_rw_barrier
1880     MemoryBarrier
1881     mm_empty
1882     rdtsc
1883     sarestart
1884     sem_timedwait
1885     sync_val_compare_and_swap
1886 "
1887 HAVE_LIST_CMDLINE="
1888     inline_asm
1889     symver
1890     x86asm
1891 "
1892
1893 HAVE_LIST_PUB="
1894     bigendian
1895     fast_unaligned
1896 "
1897
1898 HEADERS_LIST="
1899     altivec_h
1900     arpa_inet_h
1901     asm_types_h
1902     cdio_paranoia_h
1903     cdio_paranoia_paranoia_h
1904     cuda_h
1905     d3d11_h
1906     dispatch_dispatch_h
1907     dev_bktr_ioctl_bt848_h
1908     dev_bktr_ioctl_meteor_h
1909     dev_ic_bt8xx_h
1910     dev_video_bktr_ioctl_bt848_h
1911     dev_video_meteor_ioctl_meteor_h
1912     direct_h
1913     dirent_h
1914     dlfcn_h
1915     dxgidebug_h
1916     dxva_h
1917     ES2_gl_h
1918     gsm_h
1919     io_h
1920     mach_mach_time_h
1921     machine_ioctl_bt848_h
1922     machine_ioctl_meteor_h
1923     malloc_h
1924     opencv2_core_core_c_h
1925     openjpeg_2_2_openjpeg_h
1926     openjpeg_2_1_openjpeg_h
1927     openjpeg_2_0_openjpeg_h
1928     openjpeg_1_5_openjpeg_h
1929     OpenGL_gl3_h
1930     poll_h
1931     soundcard_h
1932     stdatomic_h
1933     sys_mman_h
1934     sys_param_h
1935     sys_resource_h
1936     sys_select_h
1937     sys_soundcard_h
1938     sys_time_h
1939     sys_un_h
1940     sys_videoio_h
1941     termios_h
1942     udplite_h
1943     unistd_h
1944     valgrind_valgrind_h
1945     windows_h
1946     winsock2_h
1947 "
1948
1949 INTRINSICS_LIST="
1950     intrinsics_neon
1951 "
1952
1953 COMPLEX_FUNCS="
1954     cabs
1955     cexp
1956 "
1957
1958 MATH_FUNCS="
1959     atanf
1960     atan2f
1961     cbrt
1962     cbrtf
1963     copysign
1964     cosf
1965     erf
1966     exp2
1967     exp2f
1968     expf
1969     hypot
1970     isfinite
1971     isinf
1972     isnan
1973     ldexpf
1974     llrint
1975     llrintf
1976     log2
1977     log2f
1978     log10f
1979     lrint
1980     lrintf
1981     powf
1982     rint
1983     round
1984     roundf
1985     sinf
1986     trunc
1987     truncf
1988 "
1989
1990 SYSTEM_FUNCS="
1991     access
1992     aligned_malloc
1993     arc4random
1994     clock_gettime
1995     closesocket
1996     CommandLineToArgvW
1997     CoTaskMemFree
1998     CryptGenRandom
1999     dlopen
2000     fcntl
2001     flt_lim
2002     fork
2003     getaddrinfo
2004     gethrtime
2005     getopt
2006     GetProcessAffinityMask
2007     GetProcessMemoryInfo
2008     GetProcessTimes
2009     getrusage
2010     GetSystemTimeAsFileTime
2011     gettimeofday
2012     glob
2013     glXGetProcAddress
2014     gmtime_r
2015     inet_aton
2016     isatty
2017     jack_port_get_latency_range
2018     kbhit
2019     LoadLibrary
2020     localtime_r
2021     lstat
2022     lzo1x_999_compress
2023     mach_absolute_time
2024     MapViewOfFile
2025     memalign
2026     mkstemp
2027     mmap
2028     mprotect
2029     nanosleep
2030     PeekNamedPipe
2031     posix_memalign
2032     pthread_cancel
2033     sched_getaffinity
2034     SetConsoleTextAttribute
2035     SetConsoleCtrlHandler
2036     setmode
2037     setrlimit
2038     Sleep
2039     strerror_r
2040     sysconf
2041     sysctl
2042     usleep
2043     UTGetOSTypeFromString
2044     VirtualAlloc
2045     wglGetProcAddress
2046 "
2047
2048 TOOLCHAIN_FEATURES="
2049     as_dn_directive
2050     as_fpu_directive
2051     as_func
2052     as_object_arch
2053     asm_mod_q
2054     attribute_may_alias
2055     attribute_packed
2056     blocks_extension
2057     ebp_available
2058     ebx_available
2059     gnu_as
2060     gnu_windres
2061     ibm_asm
2062     inline_asm_direct_symbol_refs
2063     inline_asm_labels
2064     inline_asm_nonlocal_labels
2065     pragma_deprecated
2066     rsync_contimeout
2067     symver_asm_label
2068     symver_gnu_asm
2069     vfp_args
2070     xform_asm
2071     xmm_clobbers
2072 "
2073
2074 TYPES_LIST="
2075     CONDITION_VARIABLE_Ptr
2076     socklen_t
2077     struct_addrinfo
2078     struct_group_source_req
2079     struct_ip_mreq_source
2080     struct_ipv6_mreq
2081     struct_msghdr_msg_flags
2082     struct_pollfd
2083     struct_rusage_ru_maxrss
2084     struct_sctp_event_subscribe
2085     struct_sockaddr_in6
2086     struct_sockaddr_sa_len
2087     struct_sockaddr_storage
2088     struct_stat_st_mtim_tv_nsec
2089     struct_v4l2_frmivalenum_discrete
2090 "
2091
2092 HAVE_LIST="
2093     $ARCH_EXT_LIST
2094     $(add_suffix _external $ARCH_EXT_LIST)
2095     $(add_suffix _inline   $ARCH_EXT_LIST)
2096     $ARCH_FEATURES
2097     $ATOMICS_LIST
2098     $BUILTIN_LIST
2099     $COMPLEX_FUNCS
2100     $HAVE_LIST_CMDLINE
2101     $HAVE_LIST_PUB
2102     $HEADERS_LIST
2103     $INTRINSICS_LIST
2104     $MATH_FUNCS
2105     $SYSTEM_FUNCS
2106     $THREADS_LIST
2107     $TOOLCHAIN_FEATURES
2108     $TYPES_LIST
2109     atomics_native
2110     dos_paths
2111     libc_msvcrt
2112     makeinfo
2113     makeinfo_html
2114     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
2115     perl
2116     pod2man
2117     section_data_rel_ro
2118     texi2html
2119     threads
2120     uwp
2121     vaapi_drm
2122     vaapi_x11
2123     vdpau_x11
2124     winrt
2125 "
2126
2127 # options emitted with CONFIG_ prefix but not available on the command line
2128 CONFIG_EXTRA="
2129     aandcttables
2130     ac3dsp
2131     audio_frame_queue
2132     audiodsp
2133     blockdsp
2134     bswapdsp
2135     cabac
2136     dirac_parse
2137     dvprofile
2138     exif
2139     faandct
2140     faanidct
2141     fdctdsp
2142     flacdsp
2143     fmtconvert
2144     frame_thread_encoder
2145     g722dsp
2146     golomb
2147     gplv3
2148     h263dsp
2149     h264chroma
2150     h264dsp
2151     h264parse
2152     h264pred
2153     h264qpel
2154     hevcparse
2155     hpeldsp
2156     huffman
2157     huffyuvdsp
2158     huffyuvencdsp
2159     idctdsp
2160     iirfilter
2161     mdct15
2162     intrax8
2163     iso_media
2164     ividsp
2165     jpegtables
2166     lgplv3
2167     libx262
2168     llauddsp
2169     llviddsp
2170     llvidencdsp
2171     lpc
2172     lzf
2173     me_cmp
2174     mpeg_er
2175     mpegaudio
2176     mpegaudiodsp
2177     mpegaudioheader
2178     mpegvideo
2179     mpegvideoenc
2180     mss34dsp
2181     pixblockdsp
2182     qpeldsp
2183     qsv
2184     qsvdec
2185     qsvenc
2186     rangecoder
2187     riffdec
2188     riffenc
2189     rtpdec
2190     rtpenc_chain
2191     rv34dsp
2192     sinewin
2193     snappy
2194     srtp
2195     startcode
2196     texturedsp
2197     texturedspenc
2198     tpeldsp
2199     vaapi_encode
2200     vc1dsp
2201     videodsp
2202     vp3dsp
2203     vp56dsp
2204     vp8dsp
2205     wma_freqs
2206     wmv2dsp
2207 "
2208
2209 CMDLINE_SELECT="
2210     $ARCH_EXT_LIST
2211     $CONFIG_LIST
2212     $HAVE_LIST_CMDLINE
2213     $THREADS_LIST
2214     asm
2215     cross_compile
2216     debug
2217     extra_warnings
2218     logging
2219     lto
2220     optimizations
2221     rpath
2222     stripping
2223 "
2224
2225 PATHS_LIST="
2226     bindir
2227     datadir
2228     docdir
2229     incdir
2230     libdir
2231     mandir
2232     pkgconfigdir
2233     prefix
2234     shlibdir
2235     install_name_dir
2236 "
2237
2238 CMDLINE_SET="
2239     $PATHS_LIST
2240     ar
2241     arch
2242     as
2243     assert_level
2244     build_suffix
2245     cc
2246     objcc
2247     cpu
2248     cross_prefix
2249     custom_allocator
2250     cxx
2251     dep_cc
2252     doxygen
2253     env
2254     extra_version
2255     gas
2256     host_cc
2257     host_cflags
2258     host_extralibs
2259     host_ld
2260     host_ldflags
2261     host_os
2262     ignore_tests
2263     install
2264     ld
2265     ln_s
2266     logfile
2267     malloc_prefix
2268     nm
2269     optflags
2270     nvccflags
2271     pkg_config
2272     pkg_config_flags
2273     progs_suffix
2274     random_seed
2275     ranlib
2276     samples
2277     strip
2278     sws_max_filter_size
2279     sysinclude
2280     sysroot
2281     target_exec
2282     target_os
2283     target_path
2284     target_samples
2285     tempprefix
2286     toolchain
2287     valgrind
2288     x86asmexe
2289 "
2290
2291 CMDLINE_APPEND="
2292     extra_cflags
2293     extra_cxxflags
2294     extra_objcflags
2295     host_cppflags
2296 "
2297
2298 # code dependency declarations
2299
2300 # architecture extensions
2301
2302 armv5te_deps="arm"
2303 armv6_deps="arm"
2304 armv6t2_deps="arm"
2305 armv8_deps="aarch64"
2306 neon_deps_any="aarch64 arm"
2307 intrinsics_neon_deps="neon"
2308 vfp_deps_any="aarch64 arm"
2309 vfpv3_deps="vfp"
2310 setend_deps="arm"
2311
2312 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
2313
2314 loongson2_deps="mips"
2315 loongson3_deps="mips"
2316 mipsfpu_deps="mips"
2317 mipsdsp_deps="mips"
2318 mipsdspr2_deps="mips"
2319 mips32r2_deps="mips"
2320 mips32r5_deps="mips"
2321 mips32r6_deps="mips"
2322 mips64r2_deps="mips"
2323 mips64r6_deps="mips"
2324 msa_deps="mipsfpu"
2325 mmi_deps="mips"
2326
2327 altivec_deps="ppc"
2328 dcbzl_deps="ppc"
2329 ldbrx_deps="ppc"
2330 ppc4xx_deps="ppc"
2331 vsx_deps="altivec"
2332 power8_deps="vsx"
2333
2334 cpunop_deps="i686"
2335 x86_64_select="i686"
2336 x86_64_suggest="fast_cmov"
2337
2338 amd3dnow_deps="mmx"
2339 amd3dnowext_deps="amd3dnow"
2340 i686_deps="x86"
2341 mmx_deps="x86"
2342 mmxext_deps="mmx"
2343 sse_deps="mmxext"
2344 sse2_deps="sse"
2345 sse3_deps="sse2"
2346 ssse3_deps="sse3"
2347 sse4_deps="ssse3"
2348 sse42_deps="sse4"
2349 aesni_deps="sse42"
2350 avx_deps="sse42"
2351 xop_deps="avx"
2352 fma3_deps="avx"
2353 fma4_deps="avx"
2354 avx2_deps="avx"
2355
2356 mmx_external_deps="x86asm"
2357 mmx_inline_deps="inline_asm"
2358 mmx_suggest="mmx_external mmx_inline"
2359
2360 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2361     eval dep=\$${ext}_deps
2362     eval ${ext}_external_deps='"${dep}_external"'
2363     eval ${ext}_inline_deps='"${dep}_inline"'
2364     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2365 done
2366
2367 aligned_stack_if_any="aarch64 ppc x86"
2368 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2369 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2370 fast_unaligned_if_any="aarch64 ppc x86"
2371 simd_align_16_if_any="altivec neon sse"
2372 simd_align_32_if_any="avx"
2373
2374 # system capabilities
2375 symver_if_any="symver_asm_label symver_gnu_asm"
2376 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
2377
2378 # threading support
2379 atomics_gcc_if="sync_val_compare_and_swap"
2380 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2381 atomics_win32_if="MemoryBarrier"
2382 atomics_native_if_any="$ATOMICS_LIST"
2383 w32threads_deps="atomics_native"
2384 threads_if_any="$THREADS_LIST"
2385
2386 # subsystems
2387 dct_select="rdft"
2388 dirac_parse_select="golomb"
2389 error_resilience_select="me_cmp"
2390 faandct_deps="faan fdctdsp"
2391 faanidct_deps="faan idctdsp"
2392 h264dsp_select="startcode"
2393 hevcparse_select="golomb"
2394 frame_thread_encoder_deps="encoders threads"
2395 intrax8_select="blockdsp idctdsp"
2396 mdct_select="fft"
2397 mdct15_select="fft"
2398 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2399 mpeg_er_select="error_resilience"
2400 mpegaudio_select="mpegaudiodsp mpegaudioheader"
2401 mpegaudiodsp_select="dct"
2402 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp mpeg_er videodsp"
2403 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2404 vc1dsp_select="h264chroma qpeldsp startcode"
2405 rdft_select="fft"
2406
2407 # decoders / encoders
2408 aac_decoder_select="mdct15 mdct sinewin"
2409 aac_fixed_decoder_select="mdct sinewin"
2410 aac_encoder_select="audio_frame_queue iirfilter lpc mdct sinewin"
2411 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2412 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2413 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2414 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2415 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2416 adpcm_g722_decoder_select="g722dsp"
2417 adpcm_g722_encoder_select="g722dsp"
2418 aic_decoder_select="golomb idctdsp"
2419 alac_encoder_select="lpc"
2420 als_decoder_select="bswapdsp"
2421 amrnb_decoder_select="lsp"
2422 amrwb_decoder_select="lsp"
2423 amv_decoder_select="sp5x_decoder exif"
2424 amv_encoder_select="aandcttables jpegtables mpegvideoenc"
2425 ape_decoder_select="bswapdsp llauddsp"
2426 apng_decoder_select="zlib"
2427 apng_encoder_select="llvidencdsp zlib"
2428 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2429 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2430 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2431 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2432 atrac1_decoder_select="mdct sinewin"
2433 atrac3_decoder_select="mdct"
2434 atrac3p_decoder_select="mdct sinewin"
2435 avrn_decoder_select="exif jpegtables"
2436 bink_decoder_select="blockdsp hpeldsp"
2437 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2438 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2439 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2440 clearvideo_decoder_select="idctdsp"
2441 cllc_decoder_select="bswapdsp"
2442 comfortnoise_encoder_select="lpc"
2443 cook_decoder_select="audiodsp mdct sinewin"
2444 cscd_decoder_select="lzo"
2445 cscd_decoder_suggest="zlib"
2446 dca_decoder_select="mdct"
2447 dds_decoder_select="texturedsp"
2448 dirac_decoder_select="dirac_parse dwt golomb videodsp mpegvideoenc"
2449 dnxhd_decoder_select="blockdsp idctdsp"
2450 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2451 dolby_e_decoder_select="mdct"
2452 dvvideo_decoder_select="dvprofile idctdsp"
2453 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2454 dxa_decoder_select="zlib"
2455 dxv_decoder_select="lzf texturedsp"
2456 eac3_decoder_select="ac3_decoder"
2457 eac3_encoder_select="ac3_encoder"
2458 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2459 eatgq_decoder_select="aandcttables"
2460 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2461 exr_decoder_select="zlib"
2462 ffv1_decoder_select="rangecoder"
2463 ffv1_encoder_select="rangecoder"
2464 ffvhuff_decoder_select="huffyuv_decoder"
2465 ffvhuff_encoder_select="huffyuv_encoder"
2466 fic_decoder_select="golomb"
2467 flac_decoder_select="flacdsp"
2468 flac_encoder_select="bswapdsp flacdsp lpc"
2469 flashsv2_decoder_select="zlib"
2470 flashsv2_encoder_select="zlib"
2471 flashsv_decoder_select="zlib"
2472 flashsv_encoder_select="zlib"
2473 flv_decoder_select="h263_decoder"
2474 flv_encoder_select="h263_encoder"
2475 fourxm_decoder_select="blockdsp bswapdsp"
2476 fraps_decoder_select="bswapdsp huffman"
2477 g2m_decoder_select="blockdsp idctdsp jpegtables zlib"
2478 g729_decoder_select="audiodsp"
2479 h261_decoder_select="mpegvideo"
2480 h261_encoder_select="aandcttables mpegvideoenc"
2481 h263_decoder_select="h263_parser h263dsp mpegvideo qpeldsp"
2482 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2483 h263i_decoder_select="h263_decoder"
2484 h263p_decoder_select="h263_decoder"
2485 h263p_encoder_select="h263_encoder"
2486 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2487 h264_decoder_suggest="error_resilience"
2488 hap_decoder_select="snappy texturedsp"
2489 hap_encoder_deps="libsnappy"
2490 hap_encoder_select="texturedspenc"
2491 hevc_decoder_select="bswapdsp cabac golomb hevcparse videodsp"
2492 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2493 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llvidencdsp"
2494 iac_decoder_select="imc_decoder"
2495 imc_decoder_select="bswapdsp fft mdct sinewin"
2496 indeo3_decoder_select="hpeldsp"
2497 indeo4_decoder_select="ividsp"
2498 indeo5_decoder_select="ividsp"
2499 interplay_video_decoder_select="hpeldsp"
2500 jpegls_decoder_select="mjpeg_decoder"
2501 jv_decoder_select="blockdsp"
2502 lagarith_decoder_select="llviddsp"
2503 ljpeg_encoder_select="aandcttables idctdsp jpegtables mpegvideoenc"
2504 magicyuv_decoder_select="llviddsp"
2505 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2506 metasound_decoder_select="lsp mdct sinewin"
2507 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2508 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp jpegtables"
2509 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2510 mjpegb_decoder_select="mjpeg_decoder"
2511 mlp_decoder_select="mlp_parser"
2512 mlp_encoder_select="lpc"
2513 motionpixels_decoder_select="bswapdsp"
2514 mp1_decoder_select="mpegaudio"
2515 mp1float_decoder_select="mpegaudio"
2516 mp2_decoder_select="mpegaudio"
2517 mp2float_decoder_select="mpegaudio"
2518 mp3_decoder_select="mpegaudio"
2519 mp3adu_decoder_select="mpegaudio"
2520 mp3adufloat_decoder_select="mpegaudio"
2521 mp3float_decoder_select="mpegaudio"
2522 mp3on4_decoder_select="mpegaudio"
2523 mp3on4float_decoder_select="mpegaudio"
2524 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2525 mpc8_decoder_select="mpegaudiodsp"
2526 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2527 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2528 mpegvideo_decoder_select="mpegvideo"
2529 mpeg1video_decoder_select="mpegvideo"
2530 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2531 mpeg2video_decoder_select="mpegvideo"
2532 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2533 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2534 mpeg4_encoder_select="h263_encoder"
2535 msa1_decoder_select="mss34dsp"
2536 mscc_decoder_select="zlib"
2537 msmpeg4v1_decoder_select="h263_decoder"
2538 msmpeg4v2_decoder_select="h263_decoder"
2539 msmpeg4v2_encoder_select="h263_encoder"
2540 msmpeg4v3_decoder_select="h263_decoder"
2541 msmpeg4v3_encoder_select="h263_encoder"
2542 mss2_decoder_select="mpegvideo qpeldsp vc1_decoder"
2543 mts2_decoder_select="mss34dsp"
2544 mxpeg_decoder_select="mjpeg_decoder"
2545 nellymoser_decoder_select="mdct sinewin"
2546 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2547 nuv_decoder_select="idctdsp lzo"
2548 on2avc_decoder_select="mdct"
2549 opus_decoder_deps="swresample"
2550 opus_decoder_select="mdct15"
2551 opus_encoder_select="audio_frame_queue mdct15"
2552 png_decoder_select="zlib"
2553 png_encoder_select="llvidencdsp zlib"
2554 prores_decoder_select="blockdsp idctdsp"
2555 prores_encoder_select="fdctdsp"
2556 qcelp_decoder_select="lsp"
2557 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2558 ra_144_decoder_select="audiodsp"
2559 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2560 ralf_decoder_select="golomb"
2561 rawvideo_decoder_select="bswapdsp"
2562 rscc_decoder_select="zlib"
2563 rtjpeg_decoder_select="me_cmp"
2564 rv10_decoder_select="h263_decoder"
2565 rv10_encoder_select="h263_encoder"
2566 rv20_decoder_select="h263_decoder"
2567 rv20_encoder_select="h263_encoder"
2568 rv30_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2569 rv40_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
2570 screenpresso_decoder_select="zlib"
2571 shorten_decoder_select="bswapdsp"
2572 sipr_decoder_select="lsp"
2573 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2574 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2575 sonic_decoder_select="golomb rangecoder"
2576 sonic_encoder_select="golomb rangecoder"
2577 sonic_ls_encoder_select="golomb rangecoder"
2578 sp5x_decoder_select="mjpeg_decoder"
2579 srgc_decoder_select="zlib"
2580 svq1_decoder_select="hpeldsp"
2581 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2582 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2583 svq3_decoder_suggest="zlib"
2584 tak_decoder_select="audiodsp"
2585 tdsc_decoder_select="zlib mjpeg_decoder"
2586 theora_decoder_select="vp3_decoder"
2587 thp_decoder_select="mjpeg_decoder"
2588 tiff_decoder_suggest="zlib lzma"
2589 tiff_encoder_suggest="zlib"
2590 truehd_decoder_select="mlp_parser"
2591 truehd_encoder_select="lpc"
2592 truemotion2_decoder_select="bswapdsp"
2593 truespeech_decoder_select="bswapdsp"
2594 tscc_decoder_select="zlib"
2595 twinvq_decoder_select="mdct lsp sinewin"
2596 txd_decoder_select="texturedsp"
2597 utvideo_decoder_select="bswapdsp llviddsp"
2598 utvideo_encoder_select="bswapdsp huffman llvidencdsp"
2599 vble_decoder_select="llviddsp"
2600 vc1_decoder_select="blockdsp h263_decoder h264qpel intrax8 mpegvideo vc1dsp"
2601 vc1_qsv_decoder_deps="libmfx"
2602 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2603 vc1image_decoder_select="vc1_decoder"
2604 vorbis_decoder_select="mdct"
2605 vorbis_encoder_select="mdct"
2606 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2607 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2608 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2609 vp6a_decoder_select="vp6_decoder"
2610 vp6f_decoder_select="vp6_decoder"
2611 vp7_decoder_select="h264pred videodsp vp8dsp"
2612 vp8_decoder_select="h264pred videodsp vp8dsp"
2613 vp9_decoder_select="videodsp vp9_parser"
2614 webp_decoder_select="vp8_decoder exif"
2615 wmalossless_decoder_select="llauddsp"
2616 wmapro_decoder_select="mdct sinewin wma_freqs"
2617 wmav1_decoder_select="mdct sinewin wma_freqs"
2618 wmav1_encoder_select="mdct sinewin wma_freqs"
2619 wmav2_decoder_select="mdct sinewin wma_freqs"
2620 wmav2_encoder_select="mdct sinewin wma_freqs"
2621 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2622 wmv1_decoder_select="h263_decoder"
2623 wmv1_encoder_select="h263_encoder"
2624 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2625 wmv2_encoder_select="h263_encoder wmv2dsp"
2626 wmv3_decoder_select="vc1_decoder"
2627 wmv3image_decoder_select="wmv3_decoder"
2628 xma1_decoder_select="wmapro_decoder"
2629 xma2_decoder_select="wmapro_decoder"
2630 zerocodec_decoder_select="zlib"
2631 zlib_decoder_select="zlib"
2632 zlib_encoder_select="zlib"
2633 zmbv_decoder_select="zlib"
2634 zmbv_encoder_select="zlib"
2635
2636 # hardware accelerators
2637 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2638 cuda_deps_any="dlopen LoadLibrary"
2639 cuvid_deps="cuda"
2640 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder ID3D11VideoContext"
2641 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32"
2642 dxva2_extralibs="-luser32"
2643 vda_framework_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension"
2644 vda_framework_extralibs="-framework VideoDecodeAcceleration"
2645 vda_deps="vda_framework pthreads"
2646 vda_extralibs="-framework CoreFoundation -framework QuartzCore"
2647 videotoolbox_hwaccel_deps="videotoolbox pthreads"
2648 videotoolbox_hwaccel_extralibs="-framework QuartzCore"
2649 xvmc_deps="X11_extensions_XvMClib_h"
2650
2651 h263_vaapi_hwaccel_deps="vaapi"
2652 h263_vaapi_hwaccel_select="h263_decoder"
2653 h263_videotoolbox_hwaccel_deps="videotoolbox"
2654 h263_videotoolbox_hwaccel_select="h263_decoder"
2655 h264_cuvid_hwaccel_deps="cuda cuvid"
2656 h264_cuvid_hwaccel_select="h264_cuvid_decoder"
2657 h264_d3d11va_hwaccel_deps="d3d11va"
2658 h264_d3d11va_hwaccel_select="h264_decoder"
2659 h264_d3d11va2_hwaccel_deps="d3d11va"
2660 h264_d3d11va2_hwaccel_select="h264_decoder"
2661 h264_dxva2_hwaccel_deps="dxva2"
2662 h264_dxva2_hwaccel_select="h264_decoder"
2663 h264_mediacodec_hwaccel_deps="mediacodec"
2664 h264_mmal_hwaccel_deps="mmal"
2665 h264_qsv_hwaccel_deps="libmfx"
2666 h264_vaapi_hwaccel_deps="vaapi"
2667 h264_vaapi_hwaccel_select="h264_decoder"
2668 h264_vda_hwaccel_deps="vda"
2669 h264_vda_hwaccel_select="h264_decoder"
2670 h264_vda_old_hwaccel_deps="vda"
2671 h264_vda_old_hwaccel_select="h264_decoder"
2672 h264_vdpau_hwaccel_deps="vdpau"
2673 h264_vdpau_hwaccel_select="h264_decoder"
2674 h264_videotoolbox_hwaccel_deps="videotoolbox"
2675 h264_videotoolbox_hwaccel_select="h264_decoder"
2676 hevc_cuvid_hwaccel_deps="cuda cuvid"
2677 hevc_cuvid_hwaccel_select="hevc_cuvid_decoder"
2678 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2679 hevc_d3d11va_hwaccel_select="hevc_decoder"
2680 hevc_mediacodec_hwaccel_deps="mediacodec"
2681 hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2682 hevc_d3d11va2_hwaccel_select="hevc_decoder"
2683 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2684 hevc_dxva2_hwaccel_select="hevc_decoder"
2685 hevc_qsv_hwaccel_deps="libmfx"
2686 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2687 hevc_vaapi_hwaccel_select="hevc_decoder"
2688 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2689 hevc_vdpau_hwaccel_select="hevc_decoder"
2690 mjpeg_cuvid_hwaccel_deps="cuda cuvid"
2691 mjpeg_cuvid_hwaccel_select="mjpeg_cuvid_decoder"
2692 mpeg_xvmc_hwaccel_deps="xvmc"
2693 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2694 mpeg1_cuvid_hwaccel_deps="cuda cuvid"
2695 mpeg1_cuvid_hwaccel_select="mpeg1_cuvid_decoder"
2696 mpeg1_vdpau_hwaccel_deps="vdpau"
2697 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2698 mpeg1_videotoolbox_hwaccel_deps="videotoolbox"
2699 mpeg1_videotoolbox_hwaccel_select="mpeg1video_decoder"
2700 mpeg1_xvmc_hwaccel_deps="xvmc"
2701 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2702 mpeg2_cuvid_hwaccel_deps="cuda cuvid"
2703 mpeg2_cuvid_hwaccel_select="mpeg2_cuvid_decoder"
2704 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2705 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2706 mpeg2_d3d11va2_hwaccel_deps="d3d11va"
2707 mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
2708 mpeg2_dxva2_hwaccel_deps="dxva2"
2709 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2710 mpeg2_mediacodec_hwaccel_deps="mediacodec"
2711 mpeg2_mmal_hwaccel_deps="mmal"
2712 mpeg2_qsv_hwaccel_deps="libmfx"
2713 mpeg2_qsv_hwaccel_select="qsvdec_mpeg2"
2714 mpeg2_vaapi_hwaccel_deps="vaapi"
2715 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2716 mpeg2_vdpau_hwaccel_deps="vdpau"
2717 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2718 mpeg2_videotoolbox_hwaccel_deps="videotoolbox"
2719 mpeg2_videotoolbox_hwaccel_select="mpeg2video_decoder"
2720 mpeg2_xvmc_hwaccel_deps="xvmc"
2721 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2722 mpeg4_cuvid_hwaccel_deps="cuda cuvid"
2723 mpeg4_cuvid_hwaccel_select="mpeg4_cuvid_decoder"
2724 mpeg4_mediacodec_hwaccel_deps="mediacodec"
2725 mpeg4_mmal_hwaccel_deps="mmal"
2726 mpeg4_vaapi_hwaccel_deps="vaapi"
2727 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2728 mpeg4_vdpau_hwaccel_deps="vdpau"
2729 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2730 mpeg4_videotoolbox_hwaccel_deps="videotoolbox"
2731 mpeg4_videotoolbox_hwaccel_select="mpeg4_decoder"
2732 vc1_cuvid_hwaccel_deps="cuda cuvid"
2733 vc1_cuvid_hwaccel_select="vc1_cuvid_decoder"
2734 vc1_d3d11va_hwaccel_deps="d3d11va"
2735 vc1_d3d11va_hwaccel_select="vc1_decoder"
2736 vc1_d3d11va2_hwaccel_deps="d3d11va"
2737 vc1_d3d11va2_hwaccel_select="vc1_decoder"
2738 vc1_dxva2_hwaccel_deps="dxva2"
2739 vc1_dxva2_hwaccel_select="vc1_decoder"
2740 vc1_mmal_hwaccel_deps="mmal"
2741 vc1_qsv_hwaccel_deps="libmfx"
2742 vc1_qsv_hwaccel_select="qsvdec_vc1"
2743 vc1_vaapi_hwaccel_deps="vaapi"
2744 vc1_vaapi_hwaccel_select="vc1_decoder"
2745 vc1_vdpau_hwaccel_deps="vdpau"
2746 vc1_vdpau_hwaccel_select="vc1_decoder"
2747 vp8_cuvid_hwaccel_deps="cuda cuvid"
2748 vp8_cuvid_hwaccel_select="vp8_cuvid_decoder"
2749 vp9_cuvid_hwaccel_deps="cuda cuvid"
2750 vp9_cuvid_hwaccel_select="vp9_cuvid_decoder"
2751 vp8_mediacodec_hwaccel_deps="mediacodec"
2752 vp8_qsv_hwaccel_deps="libmfx"
2753 vp9_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2754 vp9_d3d11va_hwaccel_select="vp9_decoder"
2755 vp9_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
2756 vp9_d3d11va2_hwaccel_select="vp9_decoder"
2757 vp9_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_VP9"
2758 vp9_dxva2_hwaccel_select="vp9_decoder"
2759 vp9_mediacodec_hwaccel_deps="mediacodec"
2760 vp9_vaapi_hwaccel_deps="vaapi VADecPictureParameterBufferVP9_bit_depth"
2761 vp9_vaapi_hwaccel_select="vp9_decoder"
2762 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2763 wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
2764 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2765 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2766 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2767
2768 # hardware-accelerated codecs
2769 omx_deps="dlopen pthreads"
2770 omx_extralibs='$ldl'
2771 omx_rpi_select="omx"
2772 qsvdec_select="qsv"
2773 qsvenc_select="qsv"
2774 vaapi_encode_deps="vaapi"
2775 v4l2_m2m_deps_any="linux_videodev2_h"
2776
2777 hwupload_cuda_filter_deps="cuda"
2778 scale_npp_filter_deps="cuda libnpp"
2779 scale_cuda_filter_deps="cuda_sdk"
2780 thumbnail_cuda_filter_deps="cuda_sdk"
2781
2782 nvenc_deps="cuda"
2783 nvenc_deps_any="dlopen LoadLibrary"
2784 nvenc_encoder_deps="nvenc"
2785
2786 h263_v4l2m2m_decoder_deps="v4l2_m2m h263_v4l2_m2m"
2787 h263_v4l2m2m_encoder_deps="v4l2_m2m h263_v4l2_m2m"
2788 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2789 h264_cuvid_decoder_deps="cuda cuvid"
2790 h264_cuvid_decoder_select="h264_mp4toannexb_bsf"
2791 h264_mediacodec_decoder_deps="mediacodec"
2792 h264_mediacodec_decoder_select="h264_mp4toannexb_bsf h264_parser"
2793 h264_mmal_decoder_deps="mmal"
2794 h264_nvenc_encoder_deps="nvenc"
2795 h264_omx_encoder_deps="omx"
2796 h264_qsv_decoder_deps="libmfx"
2797 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2798 h264_qsv_encoder_deps="libmfx"
2799 h264_qsv_encoder_select="qsvenc"
2800 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2801 h264_vaapi_encoder_select="vaapi_encode golomb"
2802 h264_vda_decoder_deps="vda"
2803 h264_vda_decoder_select="h264_decoder"
2804 h264_vdpau_decoder_deps="vdpau"
2805 h264_vdpau_decoder_select="h264_decoder"
2806 h264_v4l2m2m_decoder_deps="v4l2_m2m h264_v4l2_m2m"
2807 h264_v4l2m2m_encoder_deps="v4l2_m2m h264_v4l2_m2m"
2808 hevc_cuvid_decoder_deps="cuda cuvid"
2809 hevc_cuvid_decoder_select="hevc_mp4toannexb_bsf"
2810 hevc_mediacodec_decoder_deps="mediacodec"
2811 hevc_mediacodec_decoder_select="hevc_mp4toannexb_bsf hevc_parser"
2812 hevc_nvenc_encoder_deps="nvenc"
2813 hevc_qsv_decoder_deps="libmfx"
2814 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
2815 hevc_qsv_encoder_deps="libmfx"
2816 hevc_qsv_encoder_select="hevcparse qsvenc"
2817 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2818 hevc_vaapi_encoder_select="vaapi_encode golomb"
2819 hevc_v4l2m2m_decoder_deps="v4l2_m2m hevc_v4l2_m2m"
2820 hevc_v4l2m2m_encoder_deps="v4l2_m2m hevc_v4l2_m2m"
2821 mjpeg_cuvid_decoder_deps="cuda cuvid"
2822 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2823 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2824 mpeg1_cuvid_decoder_deps="cuda cuvid"
2825 mpeg1_vdpau_decoder_deps="vdpau"
2826 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2827 mpeg1_v4l2m2m_decoder_deps="v4l2_m2m mpeg1_v4l2_m2m"
2828 mpeg2_crystalhd_decoder_select="crystalhd"
2829 mpeg2_cuvid_decoder_deps="cuda cuvid"
2830 mpeg2_mmal_decoder_deps="mmal"
2831 mpeg2_mediacodec_decoder_deps="mediacodec"
2832 mpeg2_qsv_decoder_deps="libmfx"
2833 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel"
2834 mpeg2_qsv_encoder_deps="libmfx"
2835 mpeg2_qsv_encoder_select="qsvenc"
2836 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2837 mpeg2_vaapi_encoder_select="vaapi_encode"
2838 mpeg2_v4l2m2m_decoder_deps="v4l2_m2m mpeg2_v4l2_m2m"
2839 mpeg4_crystalhd_decoder_select="crystalhd"
2840 mpeg4_cuvid_decoder_deps="cuda cuvid"
2841 mpeg4_mediacodec_decoder_deps="mediacodec"
2842 mpeg4_mmal_decoder_deps="mmal"
2843 mpeg4_omx_encoder_deps="omx"
2844 mpeg4_vdpau_decoder_deps="vdpau"
2845 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2846 mpeg4_v4l2m2m_decoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
2847 mpeg4_v4l2m2m_encoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
2848 mpeg_vdpau_decoder_deps="vdpau"
2849 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2850 msmpeg4_crystalhd_decoder_select="crystalhd"
2851 nvenc_h264_encoder_select="h264_nvenc_encoder"
2852 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2853 vc1_crystalhd_decoder_select="crystalhd"
2854 vc1_cuvid_decoder_deps="cuda cuvid"
2855 vc1_mmal_decoder_deps="mmal"
2856 vc1_vdpau_decoder_deps="vdpau"
2857 vc1_vdpau_decoder_select="vc1_decoder"
2858 vc1_v4l2m2m_decoder_deps="v4l2_m2m vc1_v4l2_m2m"
2859 vp8_cuvid_decoder_deps="cuda cuvid"
2860 vp8_mediacodec_decoder_deps="mediacodec"
2861 vp8_qsv_decoder_deps="libmfx"
2862 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2863 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2864 vp8_vaapi_encoder_select="vaapi_encode"
2865 vp8_v4l2m2m_decoder_deps="v4l2_m2m vp8_v4l2_m2m"
2866 vp8_v4l2m2m_encoder_deps="v4l2_m2m vp8_v4l2_m2m"
2867 vp9_cuvid_decoder_deps="cuda cuvid"
2868 vp9_mediacodec_decoder_deps="mediacodec"
2869 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
2870 vp9_vaapi_encoder_select="vaapi_encode"
2871 vp9_v4l2m2m_decoder_deps="v4l2_m2m vp9_v4l2_m2m"
2872 wmv3_crystalhd_decoder_select="crystalhd"
2873 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2874
2875 # parsers
2876 h264_parser_select="golomb h264dsp h264parse"
2877 hevc_parser_select="hevcparse"
2878 mpegaudio_parser_select="mpegaudioheader"
2879 mpegvideo_parser_select="mpegvideo"
2880 mpeg4video_parser_select="h263dsp mpegvideo qpeldsp"
2881 vc1_parser_select="vc1dsp"
2882
2883 # bitstream_filters
2884 mjpeg2jpeg_bsf_select="jpegtables"
2885
2886 # external libraries
2887 aac_at_decoder_deps="audiotoolbox"
2888 ac3_at_decoder_deps="audiotoolbox"
2889 ac3_at_decoder_select="ac3_parser"
2890 adpcm_ima_qt_at_decoder_deps="audiotoolbox"
2891 alac_at_decoder_deps="audiotoolbox"
2892 amr_nb_at_decoder_deps="audiotoolbox"
2893 avisynth_deps_any="dlopen LoadLibrary"
2894 avisynth_demuxer_deps="avisynth"
2895 avisynth_demuxer_select="riffdec"
2896 eac3_at_decoder_deps="audiotoolbox"
2897 eac3_at_decoder_select="ac3_parser"
2898 gsm_ms_at_decoder_deps="audiotoolbox"
2899 ilbc_at_decoder_deps="audiotoolbox"
2900 mp1_at_decoder_deps="audiotoolbox"
2901 mp2_at_decoder_deps="audiotoolbox"
2902 mp3_at_decoder_deps="audiotoolbox"
2903 mp1_at_decoder_select="mpegaudioheader"
2904 mp2_at_decoder_select="mpegaudioheader"
2905 mp3_at_decoder_select="mpegaudioheader"
2906 pcm_alaw_at_decoder_deps="audiotoolbox"
2907 pcm_mulaw_at_decoder_deps="audiotoolbox"
2908 qdmc_at_decoder_deps="audiotoolbox"
2909 qdm2_at_decoder_deps="audiotoolbox"
2910 aac_at_encoder_deps="audiotoolbox"
2911 aac_at_encoder_select="audio_frame_queue"
2912 alac_at_encoder_deps="audiotoolbox"
2913 alac_at_encoder_select="audio_frame_queue"
2914 ilbc_at_encoder_deps="audiotoolbox"
2915 ilbc_at_encoder_select="audio_frame_queue"
2916 pcm_alaw_at_encoder_deps="audiotoolbox"
2917 pcm_alaw_at_encoder_select="audio_frame_queue"
2918 pcm_mulaw_at_encoder_deps="audiotoolbox"
2919 pcm_mulaw_at_encoder_select="audio_frame_queue"
2920 chromaprint_muxer_deps="chromaprint"
2921 h264_videotoolbox_encoder_deps="videotoolbox_encoder pthreads"
2922 libcelt_decoder_deps="libcelt"
2923 libfdk_aac_decoder_deps="libfdk_aac"
2924 libfdk_aac_encoder_deps="libfdk_aac"
2925 libfdk_aac_encoder_select="audio_frame_queue"
2926 libgme_demuxer_deps="libgme"
2927 libgsm_decoder_deps="libgsm"
2928 libgsm_encoder_deps="libgsm"
2929 libgsm_ms_decoder_deps="libgsm"
2930 libgsm_ms_encoder_deps="libgsm"
2931 libilbc_decoder_deps="libilbc"
2932 libilbc_encoder_deps="libilbc"
2933 libkvazaar_encoder_deps="libkvazaar"
2934 libmodplug_demuxer_deps="libmodplug"
2935 libmp3lame_encoder_deps="libmp3lame"
2936 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2937 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2938 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2939 libopencore_amrnb_encoder_select="audio_frame_queue"
2940 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2941 libopenh264_decoder_deps="libopenh264"
2942 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2943 libopenh264_encoder_deps="libopenh264"
2944 libopenjpeg_decoder_deps="libopenjpeg"
2945 libopenjpeg_encoder_deps="libopenjpeg"
2946 libopenmpt_demuxer_deps="libopenmpt"
2947 libopus_decoder_deps="libopus"
2948 libopus_encoder_deps="libopus"
2949 libopus_encoder_select="audio_frame_queue"
2950 librsvg_decoder_deps="librsvg"
2951 libshine_encoder_deps="libshine"
2952 libshine_encoder_select="audio_frame_queue"
2953 libspeex_decoder_deps="libspeex"
2954 libspeex_encoder_deps="libspeex"
2955 libspeex_encoder_select="audio_frame_queue"
2956 libtheora_encoder_deps="libtheora"
2957 libtwolame_encoder_deps="libtwolame"
2958 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2959 libvorbis_decoder_deps="libvorbis"
2960 libvorbis_encoder_deps="libvorbis"
2961 libvorbis_encoder_select="audio_frame_queue"
2962 libvpx_vp8_decoder_deps="libvpx"
2963 libvpx_vp8_encoder_deps="libvpx"
2964 libvpx_vp9_decoder_deps="libvpx"
2965 libvpx_vp9_encoder_deps="libvpx"
2966 libwavpack_encoder_deps="libwavpack"
2967 libwavpack_encoder_select="audio_frame_queue"
2968 libwebp_encoder_deps="libwebp"
2969 libwebp_anim_encoder_deps="libwebp"
2970 libx262_encoder_deps="libx262"
2971 libx264_encoder_deps="libx264"
2972 libx264rgb_encoder_deps="libx264 x264_csp_bgr"
2973 libx264rgb_encoder_select="libx264_encoder"
2974 libx265_encoder_deps="libx265"
2975 libxavs_encoder_deps="libxavs"
2976 libxvid_encoder_deps="libxvid"
2977 libzvbi_teletext_decoder_deps="libzvbi"
2978 videotoolbox_extralibs="-framework CoreFoundation -framework VideoToolbox -framework CoreMedia -framework CoreVideo"
2979 videotoolbox_encoder_deps="videotoolbox VTCompressionSessionPrepareToEncodeFrames"
2980 videotoolbox_encoder_suggest="vda_framework"
2981
2982 # demuxers / muxers
2983 ac3_demuxer_select="ac3_parser"
2984 aiff_muxer_select="iso_media"
2985 asf_demuxer_select="riffdec"
2986 asf_o_demuxer_select="riffdec"
2987 asf_muxer_select="riffenc"
2988 asf_stream_muxer_select="asf_muxer"
2989 avi_demuxer_select="iso_media riffdec exif"
2990 avi_muxer_select="riffenc"
2991 caf_demuxer_select="iso_media riffdec"
2992 caf_muxer_select="iso_media"
2993 dash_muxer_select="mp4_muxer"
2994 dash_demuxer_deps="libxml2"
2995 dirac_demuxer_select="dirac_parser"
2996 dts_demuxer_select="dca_parser"
2997 dtshd_demuxer_select="dca_parser"
2998 dv_demuxer_select="dvprofile"
2999 dv_muxer_select="dvprofile"
3000 dxa_demuxer_select="riffdec"
3001 eac3_demuxer_select="ac3_parser"
3002 f4v_muxer_select="mov_muxer"
3003 fifo_muxer_deps="threads"
3004 flac_demuxer_select="flac_parser"
3005 hds_muxer_select="flv_muxer"
3006 hls_muxer_select="mpegts_muxer"
3007 image2_alias_pix_demuxer_select="image2_demuxer"
3008 image2_brender_pix_demuxer_select="image2_demuxer"
3009 ipod_muxer_select="mov_muxer"
3010 ismv_muxer_select="mov_muxer"
3011 matroska_audio_muxer_select="matroska_muxer"
3012 matroska_demuxer_select="iso_media riffdec"
3013 matroska_demuxer_suggest="bzlib lzo zlib"
3014 matroska_muxer_select="iso_media riffenc"
3015 mmf_muxer_select="riffenc"
3016 mov_demuxer_select="iso_media riffdec"
3017 mov_demuxer_suggest="zlib"
3018 mov_muxer_select="iso_media riffenc rtpenc_chain"
3019 mp3_demuxer_select="mpegaudio_parser"
3020 mp3_muxer_select="mpegaudioheader"
3021 mp4_muxer_select="mov_muxer"
3022 mpegts_demuxer_select="iso_media"
3023 mpegts_muxer_select="adts_muxer latm_muxer"
3024 mpegtsraw_demuxer_select="mpegts_demuxer"
3025 mxf_d10_muxer_select="mxf_muxer"
3026 mxf_opatom_muxer_select="mxf_muxer"
3027 nut_muxer_select="riffenc"
3028 nuv_demuxer_select="riffdec"
3029 oga_muxer_select="ogg_muxer"
3030 ogg_demuxer_select="dirac_parse"
3031 ogv_muxer_select="ogg_muxer"
3032 opus_muxer_select="ogg_muxer"
3033 psp_muxer_select="mov_muxer"
3034 rtp_demuxer_select="sdp_demuxer"
3035 rtp_muxer_select="golomb"
3036 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
3037 rtsp_demuxer_select="http_protocol rtpdec"
3038 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
3039 sap_demuxer_select="sdp_demuxer"
3040 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
3041 sdp_demuxer_select="rtpdec"
3042 smoothstreaming_muxer_select="ismv_muxer"
3043 spdif_muxer_select="aac_parser"
3044 spx_muxer_select="ogg_muxer"
3045 swf_demuxer_suggest="zlib"
3046 tak_demuxer_select="tak_parser"
3047 tg2_muxer_select="mov_muxer"
3048 tgp_muxer_select="mov_muxer"
3049 vobsub_demuxer_select="mpegps_demuxer"
3050 w64_demuxer_select="wav_demuxer"
3051 w64_muxer_select="wav_muxer"
3052 wav_demuxer_select="riffdec"
3053 wav_muxer_select="riffenc"
3054 webm_muxer_select="iso_media riffenc"
3055 webm_dash_manifest_demuxer_select="matroska_demuxer"
3056 wtv_demuxer_select="mpegts_demuxer riffdec"
3057 wtv_muxer_select="mpegts_muxer riffenc"
3058 xmv_demuxer_select="riffdec"
3059 xwma_demuxer_select="riffdec"
3060
3061 # indevs / outdevs
3062 alsa_indev_deps="alsa"
3063 alsa_outdev_deps="alsa"
3064 avfoundation_indev_deps="avfoundation pthreads"
3065 avfoundation_indev_extralibs="-framework Foundation -framework CoreVideo -framework CoreMedia"
3066 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
3067 caca_outdev_deps="libcaca"
3068 decklink_indev_deps="decklink threads"
3069 decklink_indev_extralibs="-lstdc++"
3070 decklink_outdev_deps="decklink threads"
3071 decklink_outdev_extralibs="-lstdc++"
3072 libndi_newtek_indev_deps="libndi_newtek"
3073 libndi_newtek_indev_extralibs="-lndi"
3074 libndi_newtek_outdev_deps="libndi_newtek"
3075 libndi_newtek_outdev_extralibs="-lndi"
3076 dshow_indev_deps="IBaseFilter"
3077 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi"
3078 fbdev_indev_deps="linux_fb_h"
3079 fbdev_outdev_deps="linux_fb_h"
3080 gdigrab_indev_deps="CreateDIBSection"
3081 gdigrab_indev_extralibs="-lgdi32"
3082 gdigrab_indev_select="bmp_decoder"
3083 iec61883_indev_deps="libiec61883"
3084 jack_indev_deps="jack"
3085 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
3086 kmsgrab_indev_deps="libdrm"
3087 lavfi_indev_deps="avfilter"
3088 libcdio_indev_deps="libcdio"
3089 libdc1394_indev_deps="libdc1394"
3090 libv4l2_indev_deps="libv4l2"
3091 openal_indev_deps="openal"
3092 opengl_outdev_deps="opengl"
3093 oss_indev_deps_any="soundcard_h sys_soundcard_h"
3094 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
3095 pulse_indev_deps="libpulse"
3096 pulse_outdev_deps="libpulse"
3097 sdl2_outdev_deps="sdl2"
3098 sndio_indev_deps="sndio"
3099 sndio_outdev_deps="sndio"
3100 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
3101 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
3102 vfwcap_indev_deps="vfw32 vfwcap_defines"
3103 xcbgrab_indev_deps="libxcb"
3104 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
3105 xv_outdev_extralibs="-lXv -lX11 -lXext"
3106
3107 # protocols
3108 async_protocol_deps="threads"
3109 bluray_protocol_deps="libbluray"
3110 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
3111 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
3112 ffrtmpcrypt_protocol_select="tcp_protocol"
3113 ffrtmphttp_protocol_deps="!librtmp_protocol"
3114 ffrtmphttp_protocol_select="http_protocol"
3115 ftp_protocol_select="tcp_protocol"
3116 gopher_protocol_select="network"
3117 http_protocol_select="tcp_protocol"
3118 httpproxy_protocol_select="tcp_protocol"
3119 https_protocol_select="tls_protocol"
3120 icecast_protocol_select="http_protocol"
3121 librtmp_protocol_deps="librtmp"
3122 librtmpe_protocol_deps="librtmp"
3123 librtmps_protocol_deps="librtmp"
3124 librtmpt_protocol_deps="librtmp"
3125 librtmpte_protocol_deps="librtmp"
3126 libsmbclient_protocol_deps="libsmbclient gplv3"
3127 libssh_protocol_deps="libssh"
3128 mmsh_protocol_select="http_protocol"
3129 mmst_protocol_select="network"
3130 rtmp_protocol_deps="!librtmp_protocol"
3131 rtmp_protocol_select="tcp_protocol"
3132 rtmpe_protocol_select="ffrtmpcrypt_protocol"
3133 rtmps_protocol_deps="!librtmp_protocol"
3134 rtmps_protocol_select="tls_protocol"
3135 rtmpt_protocol_select="ffrtmphttp_protocol"
3136 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
3137 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
3138 rtp_protocol_select="udp_protocol"
3139 sctp_protocol_deps="struct_sctp_event_subscribe struct_msghdr_msg_flags"
3140 sctp_protocol_select="network"
3141 srtp_protocol_select="rtp_protocol srtp"
3142 tcp_protocol_select="network"
3143 tls_gnutls_protocol_deps="gnutls !tls_schannel_protocol !tls_securetransport_protocol"
3144 tls_gnutls_protocol_select="tcp_protocol"
3145 tls_openssl_protocol_deps="openssl !tls_schannel_protocol !tls_securetransport_protocol !tls_gnutls_protocol"
3146 tls_openssl_protocol_select="tcp_protocol"
3147 tls_schannel_protocol_deps="schannel"
3148 tls_schannel_protocol_select="tcp_protocol"
3149 tls_securetransport_protocol_deps="securetransport"
3150 tls_securetransport_protocol_select="tcp_protocol"
3151 tls_protocol_deps_any="tls_schannel_protocol tls_securetransport_protocol tls_gnutls_protocol tls_openssl_protocol"
3152 udp_protocol_select="network"
3153 udplite_protocol_select="network"
3154 unix_protocol_deps="sys_un_h"
3155 unix_protocol_select="network"
3156
3157 # filters
3158 afftfilt_filter_deps="avcodec"
3159 afftfilt_filter_select="fft"
3160 afir_filter_deps="avcodec"
3161 afir_filter_select="fft"
3162 amovie_filter_deps="avcodec avformat"
3163 aresample_filter_deps="swresample"
3164 ass_filter_deps="libass"
3165 atempo_filter_deps="avcodec"
3166 atempo_filter_select="rdft"
3167 azmq_filter_deps="libzmq"
3168 blackframe_filter_deps="gpl"
3169 boxblur_filter_deps="gpl"
3170 bs2b_filter_deps="libbs2b"
3171 colormatrix_filter_deps="gpl"
3172 coreimage_filter_deps="coreimage appkit"
3173 coreimage_filter_extralibs="-framework OpenGL"
3174 coreimagesrc_filter_deps="coreimage appkit"
3175 coreimagesrc_filter_extralibs="-framework OpenGL"
3176 cover_rect_filter_deps="avcodec avformat gpl"
3177 cropdetect_filter_deps="gpl"
3178 deinterlace_qsv_filter_deps="libmfx"
3179 deinterlace_vaapi_filter_deps="vaapi"
3180 delogo_filter_deps="gpl"
3181 deshake_filter_select="pixelutils"
3182 drawtext_filter_deps="libfreetype"
3183 elbg_filter_deps="avcodec"
3184 eq_filter_deps="gpl"
3185 fftfilt_filter_deps="avcodec"
3186 fftfilt_filter_select="rdft"
3187 find_rect_filter_deps="avcodec avformat gpl"
3188 firequalizer_filter_deps="avcodec"
3189 firequalizer_filter_select="rdft"
3190 flite_filter_deps="libflite"
3191 framerate_filter_select="pixelutils"
3192 frei0r_filter_deps="frei0r dlopen"
3193 frei0r_src_filter_deps="frei0r dlopen"
3194 fspp_filter_deps="gpl"
3195 geq_filter_deps="gpl"
3196 histeq_filter_deps="gpl"
3197 hqdn3d_filter_deps="gpl"
3198 interlace_filter_deps="gpl"
3199 kerndeint_filter_deps="gpl"
3200 ladspa_filter_deps="ladspa dlopen"
3201 mcdeint_filter_deps="avcodec gpl"
3202 movie_filter_deps="avcodec avformat"
3203 mpdecimate_filter_deps="gpl"
3204 mpdecimate_filter_select="pixelutils"
3205 mptestsrc_filter_deps="gpl"
3206 negate_filter_deps="lut_filter"
3207 nnedi_filter_deps="gpl"
3208 ocr_filter_deps="libtesseract"
3209 ocv_filter_deps="libopencv"
3210 owdenoise_filter_deps="gpl"
3211 pan_filter_deps="swresample"
3212 perspective_filter_deps="gpl"
3213 phase_filter_deps="gpl"
3214 pp7_filter_deps="gpl"
3215 pp_filter_deps="gpl postproc"
3216 pullup_filter_deps="gpl"
3217 removelogo_filter_deps="avcodec avformat swscale"
3218 repeatfields_filter_deps="gpl"
3219 resample_filter_deps="avresample"
3220 rubberband_filter_deps="librubberband"
3221 sab_filter_deps="gpl swscale"
3222 scale2ref_filter_deps="swscale"
3223 scale_filter_deps="swscale"
3224 scale_qsv_filter_deps="libmfx"
3225 select_filter_select="pixelutils"
3226 showcqt_filter_deps="avcodec avformat swscale"
3227 showcqt_filter_select="fft"
3228 showfreqs_filter_deps="avcodec"
3229 showfreqs_filter_select="fft"
3230 showspectrum_filter_deps="avcodec"
3231 showspectrum_filter_select="fft"
3232 showspectrumpic_filter_deps="avcodec"
3233 showspectrumpic_filter_select="fft"
3234 signature_filter_deps="gpl avcodec avformat"
3235 smartblur_filter_deps="gpl swscale"
3236 sofalizer_filter_deps="libmysofa avcodec"
3237 sofalizer_filter_select="fft"
3238 spectrumsynth_filter_deps="avcodec"
3239 spectrumsynth_filter_select="fft"
3240 spp_filter_deps="gpl avcodec"
3241 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
3242 stereo3d_filter_deps="gpl"
3243 subtitles_filter_deps="avformat avcodec libass"
3244 super2xsai_filter_deps="gpl"
3245 pixfmts_super2xsai_test_deps="super2xsai_filter"
3246 tinterlace_filter_deps="gpl"
3247 tinterlace_merge_test_deps="tinterlace_filter"
3248 tinterlace_pad_test_deps="tinterlace_filter"
3249 tonemap_filter_deps="const_nan"
3250 uspp_filter_deps="gpl avcodec"
3251 vaguedenoiser_filter_deps="gpl"
3252 vidstabdetect_filter_deps="libvidstab"
3253 vidstabtransform_filter_deps="libvidstab"
3254 libvmaf_filter_deps="libvmaf"
3255 zmq_filter_deps="libzmq"
3256 zoompan_filter_deps="swscale"
3257 zscale_filter_deps="libzimg const_nan"
3258 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
3259
3260 # examples
3261 avio_dir_cmd_deps="avformat avutil"
3262 avio_reading_deps="avformat avcodec avutil"
3263 decode_audio_example_deps="avcodec avutil"
3264 decode_video_example_deps="avcodec avutil"
3265 demuxing_decoding_example_deps="avcodec avformat avutil"
3266 encode_audio_example_deps="avcodec avutil"
3267 encode_video_example_deps="avcodec avutil"
3268 extract_mvs_example_deps="avcodec avformat avutil"
3269 filter_audio_example_deps="avfilter avutil"
3270 filtering_audio_example_deps="avfilter avcodec avformat avutil"
3271 filtering_video_example_deps="avfilter avcodec avformat avutil"
3272 http_multiclient_example_deps="avformat avutil fork"
3273 hw_decode_example_deps="avcodec avformat avutil"
3274 metadata_example_deps="avformat avutil"
3275 muxing_example_deps="avcodec avformat avutil swscale"
3276 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
3277 remuxing_example_deps="avcodec avformat avutil"
3278 resampling_audio_example_deps="avutil swresample"
3279 scaling_video_example_deps="avutil swscale"
3280 transcode_aac_example_deps="avcodec avformat swresample"
3281 transcoding_example_deps="avfilter avcodec avformat avutil"
3282
3283 # libraries, in linking order
3284 avcodec_deps="avutil"
3285 avcodec_select="null_bsf"
3286 avdevice_deps="avformat avcodec avutil"
3287 avfilter_deps="avutil"
3288 avformat_deps="avcodec avutil"
3289 avformat_suggest="network"
3290 avresample_deps="avutil"
3291 postproc_deps="avutil gpl"
3292 swresample_deps="avutil"
3293 swscale_deps="avutil"
3294
3295 # programs
3296 ffmpeg_deps="avcodec avfilter avformat swresample"
3297 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
3298                null_filter
3299                trim_filter"
3300 ffplay_deps="avcodec avformat swscale swresample sdl2"
3301 ffplay_extralibs='$sdl2_extralibs'
3302 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
3303 ffprobe_deps="avcodec avformat"
3304 ffserver_deps="avformat fork sarestart"
3305 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
3306
3307 # documentation
3308 podpages_deps="perl"
3309 manpages_deps="perl pod2man"
3310 htmlpages_deps="perl"
3311 htmlpages_deps_any="makeinfo_html texi2html"
3312 txtpages_deps="perl makeinfo"
3313 doc_deps_any="manpages htmlpages podpages txtpages"
3314
3315 # default parameters
3316
3317 logfile="ffbuild/config.log"
3318
3319 # installation paths
3320 prefix_default="/usr/local"
3321 bindir_default='${prefix}/bin'
3322 datadir_default='${prefix}/share/ffmpeg'
3323 docdir_default='${prefix}/share/doc/ffmpeg'
3324 incdir_default='${prefix}/include'
3325 libdir_default='${prefix}/lib'
3326 mandir_default='${prefix}/share/man'
3327
3328 # toolchain
3329 ar_default="ar"
3330 cc_default="gcc"
3331 cxx_default="g++"
3332 host_cc_default="gcc"
3333 doxygen_default="doxygen"
3334 install="install"
3335 ln_s_default="ln -s -f"
3336 nm_default="nm -g"
3337 pkg_config_default=pkg-config
3338 ranlib_default="ranlib"
3339 strip_default="strip"
3340 version_script='--version-script'
3341 x86asmexe_default="nasm"
3342 windres_default="windres"
3343 nvcc_default="nvcc"
3344 nvccflags_default="-gencode arch=compute_30,code=sm_30 -O2"
3345
3346 # OS
3347 target_os_default=$(tolower $(uname -s))
3348 host_os=$target_os_default
3349
3350 # machine
3351 if test "$target_os_default" = aix; then
3352     arch_default=$(uname -p)
3353     strip_default="strip -X32_64"
3354 else
3355     arch_default=$(uname -m)
3356 fi
3357 cpu="generic"
3358 intrinsics="none"
3359
3360 # configurable options
3361 enable $PROGRAM_LIST
3362 enable $DOCUMENT_LIST
3363 enable $EXAMPLE_LIST
3364 enable $(filter_out avresample $LIBRARY_LIST)
3365 enable stripping
3366
3367 enable asm
3368 enable debug
3369 enable doc
3370 enable faan faandct faanidct
3371 enable optimizations
3372 enable runtime_cpudetect
3373 enable safe_bitstream_reader
3374 enable static
3375 enable swscale_alpha
3376 enable valgrind_backtrace
3377
3378 sws_max_filter_size_default=256
3379 set_default sws_max_filter_size
3380
3381 # build settings
3382 SHFLAGS='-shared -Wl,-soname,$$(@F)'
3383 LIBPREF="lib"
3384 LIBSUF=".a"
3385 FULLNAME='$(NAME)$(BUILDSUF)'
3386 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
3387 SLIBPREF="lib"
3388 SLIBSUF=".so"
3389 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
3390 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
3391 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
3392 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
3393 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
3394 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
3395 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
3396
3397 asflags_filter=echo
3398 cflags_filter=echo
3399 ldflags_filter=echo
3400
3401 AS_C='-c'
3402 AS_O='-o $@'
3403 CC_C='-c'
3404 CC_E='-E -o $@'
3405 CC_O='-o $@'
3406 CXX_C='-c'
3407 CXX_O='-o $@'
3408 OBJCC_C='-c'
3409 OBJCC_E='-E -o $@'
3410 OBJCC_O='-o $@'
3411 X86ASM_O='-o $@'
3412 LD_O='-o $@'
3413 LD_LIB='-l%'
3414 LD_PATH='-L'
3415 HOSTCC_C='-c'
3416 HOSTCC_E='-E -o $@'
3417 HOSTCC_O='-o $@'
3418 HOSTLD_O='-o $@'
3419 NVCC_C='-c'
3420 NVCC_O='-o $@'
3421
3422 host_extralibs='-lm'
3423 host_cflags_filter=echo
3424 host_ldflags_filter=echo
3425
3426 target_path='$(CURDIR)'
3427
3428 # since the object filename is not given with the -MM flag, the compiler
3429 # is only able to print the basename, and we must add the path ourselves
3430 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(@F),$(@D)/$(@F)," > $(@:.o=.d)'
3431 DEPFLAGS='-MM'
3432
3433 mkdir -p ffbuild
3434
3435 # find source path
3436 if test -f configure; then
3437     source_path=.
3438 else
3439     source_path=$(cd $(dirname "$0"); pwd)
3440     case "$source_path" in
3441         *[[:blank:]]*) die "Out of tree builds are impossible with whitespace in source path." ;;
3442     esac
3443     test -e "$source_path/config.h" &&
3444         die "Out of tree builds are impossible with config.h in source dir."
3445 fi
3446
3447 for v in "$@"; do
3448     r=${v#*=}
3449     l=${v%"$r"}
3450     r=$(sh_quote "$r")
3451     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
3452 done
3453
3454 find_things(){
3455     thing=$1
3456     pattern=$2
3457     file=$source_path/$3
3458     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
3459 }
3460
3461 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
3462 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
3463 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
3464 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
3465 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
3466 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
3467 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
3468 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
3469 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
3470
3471 find_things_extern(){
3472     thing=$1
3473     pattern=$2
3474     file=$source_path/$3
3475     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
3476 }
3477
3478 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
3479 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
3480
3481 ALL_COMPONENTS="
3482     $BSF_LIST
3483     $DECODER_LIST
3484     $DEMUXER_LIST
3485     $ENCODER_LIST
3486     $FILTER_LIST
3487     $HWACCEL_LIST
3488     $INDEV_LIST
3489     $MUXER_LIST
3490     $OUTDEV_LIST
3491     $PARSER_LIST
3492     $PROTOCOL_LIST
3493 "
3494
3495 for n in $COMPONENT_LIST; do
3496     v=$(toupper ${n%s})_LIST
3497     eval enable \$$v
3498     eval ${n}_if_any="\$$v"
3499 done
3500
3501 enable $ARCH_EXT_LIST
3502
3503 die_unknown(){
3504     echo "Unknown option \"$1\"."
3505     echo "See $0 --help for available options."
3506     exit 1
3507 }
3508
3509 print_in_columns() {
3510     cols=$(expr $ncols / 24)
3511     cat | tr ' ' '\n' | sort | pr -r "-$cols" -w $ncols -t
3512 }
3513
3514 show_list() {
3515     suffix=_$1
3516     shift
3517     echo $* | sed s/$suffix//g | print_in_columns
3518     exit 0
3519 }
3520
3521 rand_list(){
3522     IFS=', '
3523     set -- $*
3524     unset IFS
3525     for thing; do
3526         comp=${thing%:*}
3527         prob=${thing#$comp}
3528         prob=${prob#:}
3529         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
3530         echo "prob ${prob:-0.5}"
3531         printf '%s\n' $comp
3532     done
3533 }
3534
3535 do_random(){
3536     action=$1
3537     shift
3538     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
3539     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
3540 }
3541
3542 for opt do
3543     optval="${opt#*=}"
3544     case "$opt" in
3545         --extra-ldflags=*)
3546             add_ldflags $optval
3547         ;;
3548         --extra-ldexeflags=*)
3549             add_ldexeflags $optval
3550         ;;
3551         --extra-ldlibflags=*)
3552             add_ldlibflags $optval
3553         ;;
3554         --extra-libs=*)
3555             add_extralibs $optval
3556         ;;
3557         --disable-devices)
3558             disable $INDEV_LIST $OUTDEV_LIST
3559         ;;
3560         --enable-debug=*)
3561             debuglevel="$optval"
3562         ;;
3563         --disable-programs)
3564             disable $PROGRAM_LIST
3565         ;;
3566         --disable-everything)
3567             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3568         ;;
3569         --disable-all)
3570             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
3571             disable $LIBRARY_LIST $PROGRAM_LIST doc
3572             enable avutil
3573         ;;
3574         --enable-random|--disable-random)
3575             action=${opt%%-random}
3576             do_random ${action#--} $COMPONENT_LIST
3577         ;;
3578         --enable-random=*|--disable-random=*)
3579             action=${opt%%-random=*}
3580             do_random ${action#--} $optval
3581         ;;
3582         --enable-sdl)
3583             enable sdl2
3584         ;;
3585         --enable-*=*|--disable-*=*)
3586             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
3587             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
3588             eval list=\$$(toupper $thing)_LIST
3589             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
3590             list=$(filter "$name" $list)
3591             [ "$list" = "" ] && warn "Option $opt did not match anything"
3592             $action $list
3593         ;;
3594         --enable-yasm|--disable-yasm)
3595             warn "The ${opt} option is only provided for compatibility and will be\n"\
3596                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
3597             test $opt = --enable-yasm && x86asm=yes || x86asm=no
3598         ;;
3599         --yasmexe=*)
3600             warn "The --yasmexe option is only provided for compatibility and will be\n"\
3601                  "removed in the future. Use --x86asmexe instead."
3602             x86asmexe="$optval"
3603         ;;
3604         --enable-?*|--disable-?*)
3605             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
3606             if is_in $option $COMPONENT_LIST; then
3607                 test $action = disable && action=unset
3608                 eval $action \$$(toupper ${option%s})_LIST
3609             elif is_in $option $CMDLINE_SELECT; then
3610                 $action $option
3611             else
3612                 die_unknown $opt
3613             fi
3614         ;;
3615         --list-*)
3616             NAME="${opt#--list-}"
3617             is_in $NAME $COMPONENT_LIST || die_unknown $opt
3618             NAME=${NAME%s}
3619             eval show_list $NAME \$$(toupper $NAME)_LIST
3620         ;;
3621         --help|-h) show_help
3622         ;;
3623         --quiet|-q) quiet=yes
3624         ;;
3625         --fatal-warnings) enable fatal_warnings
3626         ;;
3627         --libfuzzer=*)
3628             libfuzzer_path="$optval"
3629         ;;
3630         *)
3631             optname="${opt%%=*}"
3632             optname="${optname#--}"
3633             optname=$(echo "$optname" | sed 's/-/_/g')
3634             if is_in $optname $CMDLINE_SET; then
3635                 eval $optname='$optval'
3636             elif is_in $optname $CMDLINE_APPEND; then
3637                 append $optname "$optval"
3638             else
3639                 die_unknown $opt
3640             fi
3641         ;;
3642     esac
3643 done
3644
3645 for e in $env; do
3646     eval "export $e"
3647 done
3648
3649 if disabled autodetect; then
3650
3651     # Unless iconv is explicitely disabled by the user, we still want to probe
3652     # for the iconv from the libc.
3653     disabled iconv || enable libc_iconv
3654
3655     disable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
3656     disable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
3657 fi
3658 # Mark specifically enabled, but normally autodetected libraries as requested.
3659 for lib in $AUTODETECT_LIBS; do
3660     enabled $lib && request $lib
3661 done
3662 #TODO: switch to $AUTODETECT_LIBS when $THREADS_LIST is supported the same way
3663 enable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
3664 enable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
3665
3666 disabled logging && logfile=/dev/null
3667
3668 die_license_disabled() {
3669     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
3670 }
3671
3672 die_license_disabled_gpl() {
3673     enabled $1 || { enabled $v && die "$v is incompatible with the gpl and --enable-$1 is not specified."; }
3674 }
3675
3676 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
3677 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
3678
3679 enabled gpl && map "die_license_disabled_gpl nonfree" $EXTERNAL_LIBRARY_NONFREE_LIST
3680 map "die_license_disabled nonfree" $HWACCEL_LIBRARY_NONFREE_LIST
3681
3682 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3683
3684 # Disable all the library-specific components if the library itself
3685 # is disabled, see AVCODEC_LIST and following _LIST variables.
3686
3687 disable_components(){
3688     disabled ${1} && disable $(
3689         eval components="\$$(toupper ${1})_COMPONENTS"
3690         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
3691     )
3692 }
3693
3694 map 'disable_components $v' $LIBRARY_LIST
3695
3696 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
3697 set >> $logfile
3698
3699 test -n "$valgrind" && toolchain="valgrind-memcheck"
3700
3701 enabled ossfuzz && {
3702     add_cflags  -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp -fno-omit-frame-pointer
3703     add_ldflags -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp
3704 }
3705
3706 case "$toolchain" in
3707     *-asan)
3708         cc_default="${toolchain%-asan}"
3709         add_cflags  -fsanitize=address
3710         add_ldflags -fsanitize=address
3711     ;;
3712     *-msan)
3713         cc_default="${toolchain%-msan}"
3714         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
3715         add_ldflags -fsanitize=memory
3716     ;;
3717     *-tsan)
3718         cc_default="${toolchain%-tsan}"
3719         add_cflags  -fsanitize=thread -fPIE
3720         add_ldflags -fsanitize=thread -pie
3721         case "$toolchain" in
3722             gcc-tsan)
3723                 add_cflags  -fPIC
3724                 add_ldflags -fPIC
3725                 ;;
3726         esac
3727     ;;
3728     *-usan)
3729         cc_default="${toolchain%-usan}"
3730         add_cflags  -fsanitize=undefined
3731         add_ldflags -fsanitize=undefined
3732     ;;
3733     valgrind-*)
3734         target_exec_default="valgrind"
3735         case "$toolchain" in
3736             valgrind-massif)
3737                 target_exec_args="--tool=massif --alloc-fn=av_malloc --alloc-fn=av_mallocz --alloc-fn=av_calloc --alloc-fn=av_fast_padded_malloc --alloc-fn=av_fast_malloc --alloc-fn=av_realloc_f --alloc-fn=av_fast_realloc --alloc-fn=av_realloc"
3738                 ;;
3739             valgrind-memcheck)
3740                 target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3741                 ;;
3742         esac
3743     ;;
3744     msvc)
3745         # Check whether the current MSVC version needs the C99 converter.
3746         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3747         # support enough of C99 to build ffmpeg. Default to the new
3748         # behaviour if the regexp was unable to match anything, since this
3749         # successfully parses the version number of existing supported
3750         # versions that require the converter (MSVC 2010 and 2012).
3751         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3752         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3753             cc_default="cl"
3754             cxx_default="cl"
3755         else
3756             cc_default="c99wrap cl"
3757             cxx_default="c99wrap cl"
3758         fi
3759         ld_default="$source_path/compat/windows/mslink"
3760         nm_default="dumpbin -symbols"
3761         ar_default="lib"
3762         case "$arch" in
3763         arm*)
3764             as_default="armasm"
3765             ;;
3766         esac
3767         target_os_default="win32"
3768         # Use a relative path for TMPDIR. This makes sure all the
3769         # ffconf temp files are written with a relative path, avoiding
3770         # issues with msys/win32 path conversion for MSVC parameters
3771         # such as -Fo<file> or -out:<file>.
3772         TMPDIR=.
3773     ;;
3774     icl)
3775         cc_default="icl"
3776         ld_default="xilink"
3777         nm_default="dumpbin -symbols"
3778         ar_default="xilib"
3779         target_os_default="win32"
3780         TMPDIR=.
3781     ;;
3782     gcov)
3783         add_cflags  -fprofile-arcs -ftest-coverage
3784         add_ldflags -fprofile-arcs -ftest-coverage
3785     ;;
3786     llvm-cov)
3787         add_cflags -fprofile-arcs -ftest-coverage
3788         add_ldflags --coverage
3789     ;;
3790     hardened)
3791         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3792         add_cflags   -fno-strict-overflow -fstack-protector-all
3793         add_ldflags  -Wl,-z,relro -Wl,-z,now
3794         add_cflags   -fPIE
3795         add_ldexeflags -fPIE -pie
3796     ;;
3797     ?*)
3798         die "Unknown toolchain $toolchain"
3799     ;;
3800 esac
3801
3802 test -n "$cross_prefix" && enable cross_compile
3803
3804 if enabled cross_compile; then
3805     test -n "$arch" && test -n "$target_os" ||
3806         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
3807 fi
3808
3809 ar_default="${cross_prefix}${ar_default}"
3810 cc_default="${cross_prefix}${cc_default}"
3811 cxx_default="${cross_prefix}${cxx_default}"
3812 nm_default="${cross_prefix}${nm_default}"
3813 pkg_config_default="${cross_prefix}${pkg_config_default}"
3814 if ${cross_prefix}${ranlib_default} 2>&1 | grep -q "\-D "; then
3815     ranlib_default="${cross_prefix}${ranlib_default} -D"
3816 else
3817     ranlib_default="${cross_prefix}${ranlib_default}"
3818 fi
3819 strip_default="${cross_prefix}${strip_default}"
3820 windres_default="${cross_prefix}${windres_default}"
3821
3822 sysinclude_default="${sysroot}/usr/include"
3823
3824 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3825     target_exec target_os x86asmexe nvcc
3826 enabled cross_compile || host_cc_default=$cc
3827 set_default host_cc
3828
3829 pkg_config_fail_message=""
3830 if ! $pkg_config --version >/dev/null 2>&1; then
3831     warn "$pkg_config not found, library detection may fail."
3832     pkg_config=false
3833 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3834     pkg_config_fail_message="
3835 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3836 fi
3837
3838 if test $doxygen != $doxygen_default && \
3839   ! $doxygen --version >/dev/null 2>&1; then
3840     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3841 fi
3842
3843 exesuf() {
3844     case $1 in
3845         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3846     esac
3847 }
3848
3849 EXESUF=$(exesuf $target_os)
3850 HOSTEXESUF=$(exesuf $host_os)
3851
3852 # set temporary file name
3853 : ${TMPDIR:=$TEMPDIR}
3854 : ${TMPDIR:=$TMP}
3855 : ${TMPDIR:=/tmp}
3856
3857 if [ -n "$tempprefix" ] ; then
3858     mktemp(){
3859         tmpname="$tempprefix.${HOSTNAME}.${UID}"
3860         echo "$tmpname"
3861         mkdir "$tmpname"
3862     }
3863 elif ! check_cmd mktemp -u XXXXXX; then
3864     # simple replacement for missing mktemp
3865     # NOT SAFE FOR GENERAL USE
3866     mktemp(){
3867         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3868         echo "$tmpname"
3869         mkdir "$tmpname"
3870     }
3871 fi
3872
3873 FFTMPDIR=$(mktemp -d "${TMPDIR}/ffconf.XXXXXXXX" 2> /dev/null) ||
3874     die "Unable to create temporary directory in $TMPDIR."
3875
3876 tmpfile(){
3877     tmp="${FFTMPDIR}/test"$2
3878     (set -C; exec > $tmp) 2> /dev/null ||
3879         die "Unable to create temporary file in $FFTMPDIR."
3880     eval $1=$tmp
3881 }
3882
3883 trap 'rm -rf -- "$FFTMPDIR"' EXIT
3884 trap 'exit 2' INT
3885
3886 tmpfile TMPASM .asm
3887 tmpfile TMPC   .c
3888 tmpfile TMPCPP .cpp
3889 tmpfile TMPE   $EXESUF
3890 tmpfile TMPH   .h
3891 tmpfile TMPM   .m
3892 tmpfile TMPO   .o
3893 tmpfile TMPS   .S
3894 tmpfile TMPSH  .sh
3895 tmpfile TMPV   .ver
3896
3897 unset -f mktemp
3898
3899 chmod +x $TMPE
3900
3901 # make sure we can execute files in $TMPDIR
3902 cat > $TMPSH 2>> $logfile <<EOF
3903 #! /bin/sh
3904 EOF
3905 chmod +x $TMPSH >> $logfile 2>&1
3906 if ! $TMPSH >> $logfile 2>&1; then
3907     cat <<EOF
3908 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3909 variable to another directory and make sure that it is not mounted noexec.
3910 EOF
3911     die "Sanity test failed."
3912 fi
3913
3914 armasm_flags(){
3915     for flag; do
3916         case $flag in
3917             # Filter out MSVC cl.exe options from cflags that shouldn't
3918             # be passed to gas-preprocessor
3919             -M[TD]*)                                            ;;
3920             *)                  echo $flag                      ;;
3921         esac
3922    done
3923 }
3924
3925 ccc_flags(){
3926     for flag; do
3927         case $flag in
3928             -std=c99)           echo -c99                       ;;
3929             -mcpu=*)            echo -arch ${flag#*=}           ;;
3930             -mieee)             echo -ieee                      ;;
3931             -O*|-fast)          echo $flag                      ;;
3932             -fno-math-errno)    echo -assume nomath_errno       ;;
3933             -g)                 echo -g3                        ;;
3934             -Wall)              echo -msg_enable level2         ;;
3935             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3936             -Wl,*)              echo $flag                      ;;
3937             -f*|-W*)                                            ;;
3938             *)                  echo $flag                      ;;
3939         esac
3940    done
3941 }
3942
3943 cparser_flags(){
3944     for flag; do
3945         case $flag in
3946             -Wno-switch)             echo -Wno-switch-enum ;;
3947             -Wno-format-zero-length) ;;
3948             -Wdisabled-optimization) ;;
3949             -Wno-pointer-sign)       echo -Wno-other ;;
3950             *)                       echo $flag ;;
3951         esac
3952     done
3953 }
3954
3955 msvc_common_flags(){
3956     for flag; do
3957         case $flag in
3958             # In addition to specifying certain flags under the compiler
3959             # specific filters, they must be specified here as well or else the
3960             # generic catch all at the bottom will print the original flag.
3961             -Wall)                ;;
3962             -Wextra)              ;;
3963             -std=c99)             ;;
3964             # Common flags
3965             -fomit-frame-pointer) ;;
3966             -g)                   echo -Z7 ;;
3967             -fno-math-errno)      ;;
3968             -fno-common)          ;;
3969             -fno-signed-zeros)    ;;
3970             -fPIC)                ;;
3971             -mthumb)              ;;
3972             -march=*)             ;;
3973             -lz)                  echo zlib.lib ;;
3974             -lx264)               echo libx264.lib ;;
3975             -lstdc++)             ;;
3976             -l*)                  echo ${flag#-l}.lib ;;
3977             -LARGEADDRESSAWARE)   echo $flag ;;
3978             -L*)                  echo -libpath:${flag#-L} ;;
3979             *)                    echo $flag ;;
3980         esac
3981     done
3982 }
3983
3984 msvc_flags(){
3985     msvc_common_flags "$@"
3986     for flag; do
3987         case $flag in
3988             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3989                                        -wd4554 ;;
3990             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3991                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3992                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3993                                        -wd4307 \
3994                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3995         esac
3996     done
3997 }
3998
3999 icl_flags(){
4000     msvc_common_flags "$@"
4001     for flag; do
4002         case $flag in
4003             # Despite what Intel's documentation says -Wall, which is supported
4004             # on Windows, does enable remarks so disable them here.
4005             -Wall)                echo $flag -Qdiag-disable:remark ;;
4006             -std=c99)             echo -Qstd=c99 ;;
4007             -flto)                echo -ipo ;;
4008         esac
4009     done
4010 }
4011
4012 icc_flags(){
4013     for flag; do
4014         case $flag in
4015             -flto)                echo -ipo ;;
4016             *)                    echo $flag ;;
4017         esac
4018     done
4019 }
4020
4021 pgi_flags(){
4022     for flag; do
4023         case $flag in
4024             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
4025             -fomit-frame-pointer) echo -Mnoframe ;;
4026             -g)                   echo -gopt ;;
4027             *)                    echo $flag ;;
4028         esac
4029     done
4030 }
4031
4032 suncc_flags(){
4033     for flag; do
4034         case $flag in
4035             -march=*|-mcpu=*)
4036                 case "${flag#*=}" in
4037                     native)                   echo -xtarget=native       ;;
4038                     v9|niagara)               echo -xarch=sparc          ;;
4039                     ultrasparc)               echo -xarch=sparcvis       ;;
4040                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
4041                     i586|pentium)             echo -xchip=pentium        ;;
4042                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
4043                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
4044                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
4045                     pentium4*)          echo -xtarget=pentium4           ;;
4046                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
4047                     *-sse3)             echo -xarch=sse3                 ;;
4048                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
4049                     bonnell)                   echo -xarch=ssse3         ;;
4050                     corei7|nehalem)            echo -xtarget=nehalem     ;;
4051                     westmere)                  echo -xtarget=westmere    ;;
4052                     silvermont)                echo -xarch=sse4_2        ;;
4053                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
4054                     core-avx*|ivybridge|haswell|broadwell|skylake*|knl)
4055                                                echo -xarch=avx           ;;
4056                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
4057                     btver1)                    echo -xarch=amdsse4a      ;;
4058                     btver2|bdver*|znver*)      echo -xarch=avx           ;;
4059                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
4060                     k8|opteron|athlon64|athlon-fx)
4061                                                echo -xarch=sse2a         ;;
4062                     athlon*)                   echo -xarch=pentium_proa  ;;
4063                 esac
4064                 ;;
4065             -std=c99)             echo -xc99              ;;
4066             -fomit-frame-pointer) echo -xregs=frameptr    ;;
4067             -fPIC)                echo -KPIC -xcode=pic32 ;;
4068             -W*,*)                echo $flag              ;;
4069             -f*-*|-W*|-mimpure-text)                      ;;
4070             -shared)              echo -G                 ;;
4071             *)                    echo $flag              ;;
4072         esac
4073     done
4074 }
4075
4076 tms470_flags(){
4077     for flag; do
4078         case $flag in
4079             -march=*|-mcpu=*)
4080                 case "${flag#*=}" in
4081                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
4082                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
4083                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
4084                     armv6*|arm11*)          echo -mv=6   ;;
4085                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
4086                                             echo -mv=5e  ;;
4087                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
4088                 esac
4089                 ;;
4090             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
4091             -mfpu=vfp)      echo --float_support=vfpv2        ;;
4092             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
4093             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
4094             -msoft-float)   echo --float_support=vfplib       ;;
4095             -O[0-3]|-mf=*)  echo $flag                        ;;
4096             -g)             echo -g -mn                       ;;
4097             -pds=*)         echo $flag                        ;;
4098             -D*|-I*)        echo $flag                        ;;
4099             --gcc|--abi=*)  echo $flag                        ;;
4100             -me)            echo $flag                        ;;
4101         esac
4102     done
4103 }
4104
4105 probe_cc(){
4106     pfx=$1
4107     _cc=$2
4108     first=$3
4109
4110     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
4111     unset _ld_o _ldflags _ld_lib _ld_path
4112     unset _depflags _DEPCMD _DEPFLAGS
4113     _flags_filter=echo
4114
4115     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
4116         true # no-op to avoid reading stdin in following checks
4117     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
4118         _type=llvm_gcc
4119         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
4120         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
4121         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4122         _cflags_speed='-O3'
4123         _cflags_size='-Os'
4124     elif $_cc -v 2>&1 | grep -qi ^gcc; then
4125         _type=gcc
4126         gcc_version=$($_cc --version | head -n1)
4127         gcc_basever=$($_cc -dumpversion)
4128         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
4129         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
4130         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
4131         case $gcc_basever in
4132             2) ;;
4133             2.*) ;;
4134             *) _depflags='-MMD -MF $(@:.o=.d) -MT $@' ;;
4135         esac
4136         if [ "$first" = true ]; then
4137             case $gcc_basever in
4138                 4.2*)
4139                 warn "gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler." ;;
4140             esac
4141         fi
4142         _cflags_speed='-O3'
4143         _cflags_size='-Os'
4144     elif $_cc --version 2>/dev/null | grep -q ^icc; then
4145         _type=icc
4146         _ident=$($_cc --version | head -n1)
4147         _depflags='-MMD'
4148         _cflags_speed='-O3'
4149         _cflags_size='-Os'
4150         _cflags_noopt='-O1'
4151         _flags_filter=icc_flags
4152     elif $_cc -v 2>&1 | grep -q xlc; then
4153         _type=xlc
4154         _ident=$($_cc -qversion 2>/dev/null | head -n1)
4155         _cflags_speed='-O5'
4156         _cflags_size='-O5 -qcompact'
4157     elif $_cc -V 2>/dev/null | grep -q Compaq; then
4158         _type=ccc
4159         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
4160         _DEPFLAGS='-M'
4161         _cflags_speed='-fast'
4162         _cflags_size='-O1'
4163         _flags_filter=ccc_flags
4164     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
4165         test -d "$sysroot" || die "No valid sysroot specified."
4166         _type=armcc
4167         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
4168         armcc_conf="$PWD/armcc.conf"
4169         $_cc --arm_linux_configure                 \
4170              --arm_linux_config_file="$armcc_conf" \
4171              --configure_sysroot="$sysroot"        \
4172              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
4173              die "Error creating armcc configuration file."
4174         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
4175         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
4176         as_default="${cross_prefix}gcc"
4177         _depflags='-MMD'
4178         _cflags_speed='-O3'
4179         _cflags_size='-Os'
4180     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
4181         _type=tms470
4182         _ident=$($_cc -version | head -n1 | tr -s ' ')
4183         _flags='--gcc --abi=eabi -me'
4184         _cc_e='-ppl -fe=$@'
4185         _cc_o='-fe=$@'
4186         _depflags='-ppa -ppd=$(@:.o=.d)'
4187         _cflags_speed='-O3 -mf=5'
4188         _cflags_size='-O3 -mf=2'
4189         _flags_filter=tms470_flags
4190     elif $_cc -v 2>&1 | grep -q clang; then
4191         _type=clang
4192         _ident=$($_cc --version 2>/dev/null | head -n1)
4193         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4194         _cflags_speed='-O3'
4195         _cflags_size='-Oz'
4196     elif $_cc -V 2>&1 | grep -q Sun; then
4197         _type=suncc
4198         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
4199         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
4200         _DEPFLAGS='-xM1 -xc99'
4201         _ldflags='-std=c99'
4202         _cflags_speed='-O5'
4203         _cflags_size='-O5 -xspace'
4204         _flags_filter=suncc_flags
4205     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
4206         _type=pathscale
4207         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
4208         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4209         _cflags_speed='-O2'
4210         _cflags_size='-Os'
4211         _flags_filter='filter_out -Wdisabled-optimization'
4212     elif $_cc -v 2>&1 | grep -q Open64; then
4213         _type=open64
4214         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
4215         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
4216         _cflags_speed='-O2'
4217         _cflags_size='-Os'
4218         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
4219     elif $_cc -V 2>&1 | grep -q Portland; then
4220         _type=pgi
4221         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
4222         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
4223         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
4224         _cflags_size="-O2 -Munroll=c:1 $opt_common"
4225         _cflags_noopt="-O"
4226         _flags_filter=pgi_flags
4227     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
4228         _type=armasm
4229         _ident=$($_cc | head -n1)
4230         # 4509: "This form of conditional instruction is deprecated"
4231         _flags="-nologo -ignore 4509"
4232         _flags_filter=armasm_flags
4233     elif $_cc 2>&1 | grep -q Intel; then
4234         _type=icl
4235         _ident=$($_cc 2>&1 | head -n1)
4236         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
4237         # Not only is O3 broken on 13.x+ but it is slower on all previous
4238         # versions (tested) as well.
4239         _cflags_speed="-O2"
4240         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
4241         if $_cc 2>&1 | grep -q Linker; then
4242             _ld_o='-out:$@'
4243         else
4244             _ld_o='-Fe$@'
4245         fi
4246         _cc_o='-Fo$@'
4247         _cc_e='-P'
4248         _flags_filter=icl_flags
4249         _ld_lib='lib%.a'
4250         _ld_path='-libpath:'
4251         # -Qdiag-error to make icl error when seeing certain unknown arguments
4252         _flags='-nologo -Qdiag-error:4044,10157'
4253         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
4254         # with MSVC which enables it by default.
4255         _cflags='-Qms0 -Qvec- -Qsimd- -GS -fp:precise'
4256         disable stripping
4257     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
4258         # lld can emulate multiple different linkers; in ms link.exe mode,
4259         # the -? parameter gives the help output which contains an identifyable
4260         # string, while it gives an error in other modes.
4261         _type=lld-link
4262         # The link.exe mode doesn't have a switch for getting the version,
4263         # but we can force it back to gnu mode and get the version from there.
4264         _ident=$($_cc -flavor gnu --version 2>/dev/null)
4265         _ld_o='-out:$@'
4266         _flags_filter=msvc_flags
4267         _ld_lib='lib%.a'
4268         _ld_path='-libpath:'
4269     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
4270         _type=msvc
4271         _ident=$($_cc 2>&1 | head -n1)
4272         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
4273         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
4274         _cflags_speed="-O2"
4275         _cflags_size="-O1"
4276         _cflags_noopt="-O1"
4277         if $_cc -nologo- 2>&1 | grep -q Linker; then
4278             _ld_o='-out:$@'
4279         else
4280             _ld_o='-Fe$@'
4281         fi
4282         _cc_o='-Fo$@'
4283         _cc_e='-P -Fi$@'
4284         _flags_filter=msvc_flags
4285         _ld_lib='lib%.a'
4286         _ld_path='-libpath:'
4287         _flags='-nologo'
4288         disable stripping
4289     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
4290         _type=cparser
4291         _ident=$($_cc --version | head -n1)
4292         _depflags='-MMD'
4293         _cflags_speed='-O4'
4294         _cflags_size='-O2'
4295         _flags_filter=cparser_flags
4296     fi
4297
4298     eval ${pfx}_type=\$_type
4299     eval ${pfx}_ident=\$_ident
4300 }
4301
4302 set_ccvars(){
4303     eval ${1}_C=\${_cc_c-\${${1}_C}}
4304     eval ${1}_E=\${_cc_e-\${${1}_E}}
4305     eval ${1}_O=\${_cc_o-\${${1}_O}}
4306
4307     if [ -n "$_depflags" ]; then
4308         eval ${1}_DEPFLAGS=\$_depflags
4309     else
4310         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
4311         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
4312         eval DEP${1}FLAGS=\$_flags
4313     fi
4314 }
4315
4316 probe_cc cc "$cc" "true"
4317 cflags_filter=$_flags_filter
4318 cflags_speed=$_cflags_speed
4319 cflags_size=$_cflags_size
4320 cflags_noopt=$_cflags_noopt
4321 add_cflags $_flags $_cflags
4322 cc_ldflags=$_ldflags
4323 set_ccvars CC
4324 set_ccvars CXX
4325
4326 probe_cc hostcc "$host_cc"
4327 host_cflags_filter=$_flags_filter
4328 host_cflags_speed=$_cflags_speed
4329 add_host_cflags  $_flags $_cflags
4330 set_ccvars HOSTCC
4331
4332 test -n "$cc_type" && enable $cc_type ||
4333     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
4334
4335 : ${as_default:=$cc}
4336 : ${objcc_default:=$cc}
4337 : ${dep_cc_default:=$cc}
4338 : ${ld_default:=$cc}
4339 : ${host_ld_default:=$host_cc}
4340 set_default ar as objcc dep_cc ld ln_s host_ld windres
4341
4342 probe_cc as "$as"
4343 asflags_filter=$_flags_filter
4344 add_asflags $_flags $_cflags
4345 set_ccvars AS
4346
4347 probe_cc objcc "$objcc"
4348 objcflags_filter=$_flags_filter
4349 add_objcflags $_flags $_cflags
4350 set_ccvars OBJC
4351
4352 probe_cc ld "$ld"
4353 ldflags_filter=$_flags_filter
4354 add_ldflags $_flags $_ldflags
4355 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
4356 LD_O=${_ld_o-$LD_O}
4357 LD_LIB=${_ld_lib-$LD_LIB}
4358 LD_PATH=${_ld_path-$LD_PATH}
4359
4360 probe_cc hostld "$host_ld"
4361 host_ldflags_filter=$_flags_filter
4362 add_host_ldflags $_flags $_ldflags
4363 HOSTLD_O=${_ld_o-$HOSTLD_O}
4364
4365 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
4366     probe_cc depcc "$dep_cc"
4367     CCDEP=${_DEPCMD:-$DEPCMD}
4368     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
4369     DEPCCFLAGS=$_flags
4370 fi
4371
4372 if $ar 2>&1 | grep -q Microsoft; then
4373     arflags="-nologo"
4374     ar_o='-out:$@'
4375 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
4376     arflags="rq"
4377     ar_o='$@'
4378 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
4379     arflags='-Xany -r -c'
4380     ar_o='$@'
4381 elif $ar 2>&1 | grep -q "\[D\] "; then
4382     arflags="rcD"
4383     ar_o='$@'
4384 else
4385     arflags="rc"
4386     ar_o='$@'
4387 fi
4388
4389 add_cflags $extra_cflags
4390 add_cxxflags $extra_cxxflags
4391 add_objcflags $extra_objcflags
4392 add_asflags $extra_cflags
4393
4394 if test -n "$sysroot"; then
4395     case "$cc_type" in
4396         gcc|llvm_gcc|clang)
4397             add_cppflags --sysroot="$sysroot"
4398             add_ldflags --sysroot="$sysroot"
4399 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
4400             add_cppflags -isysroot "$sysroot"
4401             add_ldflags -isysroot "$sysroot"
4402         ;;
4403         tms470)
4404             add_cppflags -I"$sysinclude"
4405             add_ldflags  --sysroot="$sysroot"
4406         ;;
4407     esac
4408 fi
4409
4410 if test "$cpu" = host; then
4411     enabled cross_compile &&
4412         die "--cpu=host makes no sense when cross-compiling."
4413
4414     case "$cc_type" in
4415         gcc|llvm_gcc)
4416             check_native(){
4417                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4418                 sed -n "/cc1.*$1=/{
4419                             s/.*$1=\\([^ ]*\\).*/\\1/
4420                             p
4421                             q
4422                         }" $TMPE
4423             }
4424             cpu=$(check_native -march || check_native -mcpu)
4425         ;;
4426         clang)
4427             check_native(){
4428                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
4429                 sed -n "/cc1.*-target-cpu /{
4430                             s/.*-target-cpu \\([^ ]*\\).*/\\1/
4431                             p
4432                             q
4433                         }" $TMPE
4434             }
4435             cpu=$(check_native -march)
4436         ;;
4437     esac
4438
4439     test "${cpu:-host}" = host &&
4440         die "--cpu=host not supported with compiler $cc"
4441 fi
4442
4443 # Deal with common $arch aliases
4444 case "$arch" in
4445     aarch64|arm64)
4446         arch="aarch64"
4447     ;;
4448     arm*|iPad*|iPhone*)
4449         arch="arm"
4450     ;;
4451     mips*|IP*)
4452         case "$arch" in
4453         *el)
4454             add_cppflags -EL
4455             add_ldflags -EL
4456         ;;
4457         *eb)
4458             add_cppflags -EB
4459             add_ldflags -EB
4460         ;;
4461         esac
4462         arch="mips"
4463     ;;
4464     parisc*|hppa*)
4465         arch="parisc"
4466     ;;
4467     "Power Macintosh"|ppc*|powerpc*)
4468         arch="ppc"
4469     ;;
4470     s390|s390x)
4471         arch="s390"
4472     ;;
4473     sh4|sh)
4474         arch="sh4"
4475     ;;
4476     sun4*|sparc*)
4477         arch="sparc"
4478     ;;
4479     tilegx|tile-gx)
4480         arch="tilegx"
4481     ;;
4482     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
4483         arch="x86"
4484     ;;
4485 esac
4486
4487 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
4488 enable $arch
4489
4490 # Add processor-specific flags
4491 if enabled aarch64; then
4492
4493     case $cpu in
4494         armv*)
4495             cpuflags="-march=$cpu"
4496         ;;
4497         *)
4498             cpuflags="-mcpu=$cpu"
4499         ;;
4500     esac
4501
4502 elif enabled alpha; then
4503
4504     cpuflags="-mcpu=$cpu"
4505
4506 elif enabled arm; then
4507
4508     check_arm_arch() {
4509         check_cpp_condition stddef.h \
4510             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
4511             $cpuflags
4512     }
4513
4514     probe_arm_arch() {
4515         if   check_arm_arch 4;        then echo armv4
4516         elif check_arm_arch 4T;       then echo armv4t
4517         elif check_arm_arch 5;        then echo armv5
4518         elif check_arm_arch 5E;       then echo armv5e
4519         elif check_arm_arch 5T;       then echo armv5t
4520         elif check_arm_arch 5TE;      then echo armv5te
4521         elif check_arm_arch 5TEJ;     then echo armv5te
4522         elif check_arm_arch 6;        then echo armv6
4523         elif check_arm_arch 6J;       then echo armv6j
4524         elif check_arm_arch 6K;       then echo armv6k
4525         elif check_arm_arch 6Z;       then echo armv6z
4526         elif check_arm_arch 6ZK;      then echo armv6zk
4527         elif check_arm_arch 6T2;      then echo armv6t2
4528         elif check_arm_arch 7;        then echo armv7
4529         elif check_arm_arch 7A  7_A;  then echo armv7-a
4530         elif check_arm_arch 7S;       then echo armv7-a
4531         elif check_arm_arch 7R  7_R;  then echo armv7-r
4532         elif check_arm_arch 7M  7_M;  then echo armv7-m
4533         elif check_arm_arch 7EM 7E_M; then echo armv7-m
4534         elif check_arm_arch 8A  8_A;  then echo armv8-a
4535         fi
4536     }
4537
4538     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
4539
4540     case $cpu in
4541         armv*)
4542             cpuflags="-march=$cpu"
4543             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
4544         ;;
4545         *)
4546             cpuflags="-mcpu=$cpu"
4547             case $cpu in
4548                 cortex-a*)                               subarch=armv7a  ;;
4549                 cortex-r*)                               subarch=armv7r  ;;
4550                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
4551                 arm11*)                                  subarch=armv6   ;;
4552                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
4553                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
4554                 *)                             subarch=$(probe_arm_arch) ;;
4555             esac
4556         ;;
4557     esac
4558
4559     case "$subarch" in
4560         armv5t*)    enable fast_clz                ;;
4561         armv[6-8]*)
4562             enable fast_clz
4563             disabled fast_unaligned || enable fast_unaligned
4564             ;;
4565     esac
4566
4567 elif enabled avr32; then
4568
4569     case $cpu in
4570         ap7[02]0[0-2])
4571             subarch="avr32_ap"
4572             cpuflags="-mpart=$cpu"
4573         ;;
4574         ap)
4575             subarch="avr32_ap"
4576             cpuflags="-march=$cpu"
4577         ;;
4578         uc3[ab]*)
4579             subarch="avr32_uc"
4580             cpuflags="-mcpu=$cpu"
4581         ;;
4582         uc)
4583             subarch="avr32_uc"
4584             cpuflags="-march=$cpu"
4585         ;;
4586     esac
4587
4588 elif enabled bfin; then
4589
4590     cpuflags="-mcpu=$cpu"
4591
4592 elif enabled mips; then
4593
4594     cpuflags="-march=$cpu"
4595
4596     if [ "$cpu" != "generic" ]; then
4597         disable mips32r2
4598         disable mips32r5
4599         disable mips64r2
4600         disable mips32r6
4601         disable mips64r6
4602         disable loongson2
4603         disable loongson3
4604
4605         case $cpu in
4606             24kc|24kf*|24kec|34kc|1004kc|24kef*|34kf*|1004kf*|74kc|74kf)
4607                 enable mips32r2
4608                 disable msa
4609             ;;
4610             p5600|i6400|p6600)
4611                 disable mipsdsp
4612                 disable mipsdspr2
4613             ;;
4614             loongson*)
4615                 enable loongson2
4616                 enable loongson3
4617                 enable local_aligned_8 local_aligned_16 local_aligned_32
4618                 enable simd_align_16
4619                 enable fast_64bit
4620                 enable fast_clz
4621                 enable fast_cmov
4622                 enable fast_unaligned
4623                 disable aligned_stack
4624                 disable mipsfpu
4625                 disable mipsdsp
4626                 disable mipsdspr2
4627                 case $cpu in
4628                     loongson3*)
4629                         cpuflags="-march=loongson3a -mhard-float -fno-expensive-optimizations"
4630                     ;;
4631                     loongson2e)
4632                         cpuflags="-march=loongson2e -mhard-float -fno-expensive-optimizations"
4633                     ;;
4634                     loongson2f)
4635                         cpuflags="-march=loongson2f -mhard-float -fno-expensive-optimizations"
4636                     ;;
4637                 esac
4638             ;;
4639             *)
4640                 # Unknown CPU. Disable everything.
4641                 warn "unknown CPU. Disabling all MIPS optimizations."
4642                 disable mipsfpu
4643                 disable mipsdsp
4644                 disable mipsdspr2
4645                 disable msa
4646                 disable mmi
4647             ;;
4648         esac
4649
4650         case $cpu in
4651             24kc)
4652                 disable mipsfpu
4653                 disable mipsdsp
4654                 disable mipsdspr2
4655             ;;
4656             24kf*)
4657                 disable mipsdsp
4658                 disable mipsdspr2
4659             ;;
4660             24kec|34kc|1004kc)
4661                 disable mipsfpu
4662                 disable mipsdspr2
4663             ;;
4664             24kef*|34kf*|1004kf*)
4665                 disable mipsdspr2
4666             ;;
4667             74kc)
4668                 disable mipsfpu
4669             ;;
4670             p5600)
4671                 enable mips32r5
4672                 check_cflags "-mtune=p5600" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops"
4673             ;;
4674             i6400)
4675                 enable mips64r6
4676                 check_cflags "-mtune=i6400 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4677             ;;
4678             p6600)
4679                 enable mips64r6
4680                 check_cflags "-mtune=p6600 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
4681             ;;
4682         esac
4683     else
4684         # We do not disable anything. Is up to the user to disable the unwanted features.
4685         warn 'generic cpu selected'
4686     fi
4687
4688 elif enabled ppc; then
4689
4690     disable ldbrx
4691
4692     case $(tolower $cpu) in
4693         601|ppc601|powerpc601)
4694             cpuflags="-mcpu=601"
4695             disable altivec
4696         ;;
4697         603*|ppc603*|powerpc603*)
4698             cpuflags="-mcpu=603"
4699             disable altivec
4700         ;;
4701         604*|ppc604*|powerpc604*)
4702             cpuflags="-mcpu=604"
4703             disable altivec
4704         ;;
4705         g3|75*|ppc75*|powerpc75*)
4706             cpuflags="-mcpu=750"
4707             disable altivec
4708         ;;
4709         g4|745*|ppc745*|powerpc745*)
4710             cpuflags="-mcpu=7450"
4711             disable vsx
4712         ;;
4713         74*|ppc74*|powerpc74*)
4714             cpuflags="-mcpu=7400"
4715             disable vsx
4716         ;;
4717         g5|970|ppc970|powerpc970)
4718             cpuflags="-mcpu=970"
4719             disable vsx
4720         ;;
4721         power[3-6]*)
4722             cpuflags="-mcpu=$cpu"
4723             disable vsx
4724         ;;
4725         power[7-8]*)
4726             cpuflags="-mcpu=$cpu"
4727         ;;
4728         cell)
4729             cpuflags="-mcpu=cell"
4730             enable ldbrx
4731             disable vsx
4732         ;;
4733         e500mc)
4734             cpuflags="-mcpu=e500mc"
4735             disable altivec
4736         ;;
4737         e500v2)
4738             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
4739             disable altivec
4740             disable dcbzl
4741         ;;
4742         e500)
4743             cpuflags="-mcpu=8540 -mhard-float"
4744             disable altivec
4745             disable dcbzl
4746         ;;
4747     esac
4748
4749 elif enabled sparc; then
4750
4751     case $cpu in
4752         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
4753             cpuflags="-mcpu=$cpu"
4754         ;;
4755         ultrasparc*|niagara[234])
4756             cpuflags="-mcpu=$cpu"
4757         ;;
4758     esac
4759
4760 elif enabled x86; then
4761
4762     case $cpu in
4763         i[345]86|pentium)
4764             cpuflags="-march=$cpu"
4765             disable i686
4766             disable mmx
4767         ;;
4768         # targets that do NOT support nopl and conditional mov (cmov)
4769         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
4770             cpuflags="-march=$cpu"
4771             disable i686
4772         ;;
4773         # targets that do support nopl and conditional mov (cmov)
4774         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
4775         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|skylake*|knl\
4776         |amdfam10|barcelona|b[dt]ver*|znver*)
4777             cpuflags="-march=$cpu"
4778             enable i686
4779             enable fast_cmov
4780         ;;
4781         # targets that do support conditional mov but on which it's slow
4782         pentium4|pentium4m|prescott|nocona)
4783             cpuflags="-march=$cpu"
4784             enable i686
4785             disable fast_cmov
4786         ;;
4787     esac
4788
4789 fi
4790
4791 if [ "$cpu" != generic ]; then
4792     add_cflags  $cpuflags
4793     add_asflags $cpuflags
4794     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
4795 fi
4796
4797 # compiler sanity check
4798 check_exec <<EOF
4799 int main(void){ return 0; }
4800 EOF
4801 if test "$?" != 0; then
4802     echo "$cc is unable to create an executable file."
4803     if test -z "$cross_prefix" && ! enabled cross_compile ; then
4804         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
4805         echo "Only do this if you know what cross compiling means."
4806     fi
4807     die "C compiler test failed."
4808 fi
4809
4810 add_cppflags -D_ISOC99_SOURCE
4811 add_cxxflags -D__STDC_CONSTANT_MACROS
4812 check_cxxflags -std=c++11 || check_cxxflags -std=c++0x
4813
4814 # some compilers silently accept -std=c11, so we also need to check that the
4815 # version macro is defined properly
4816 check_cpp_condition ctype.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
4817     add_cflags -std=c11 ||
4818     check_cflags -std=c99
4819
4820 check_cppflags -D_FILE_OFFSET_BITS=64
4821 check_cppflags -D_LARGEFILE_SOURCE
4822
4823 add_host_cppflags -D_ISOC99_SOURCE
4824 check_host_cflags -std=c99
4825 check_host_cflags -Wall
4826 check_host_cflags $host_cflags_speed
4827
4828 check_64bit(){
4829     arch32=$1
4830     arch64=$2
4831     expr=$3
4832     check_code cc "" "int test[2*($expr) - 1]" &&
4833         subarch=$arch64 || subarch=$arch32
4834 }
4835
4836 case "$arch" in
4837     aarch64|alpha|ia64)
4838         spic=$shared
4839     ;;
4840     mips)
4841         check_64bit mips mips64 '_MIPS_SIM > 1'
4842         spic=$shared
4843     ;;
4844     parisc)
4845         check_64bit parisc parisc64 'sizeof(void *) > 4'
4846         spic=$shared
4847     ;;
4848     ppc)
4849         check_64bit ppc ppc64 'sizeof(void *) > 4'
4850         spic=$shared
4851     ;;
4852     s390)
4853         check_64bit s390 s390x 'sizeof(void *) > 4'
4854         spic=$shared
4855     ;;
4856     sparc)
4857         check_64bit sparc sparc64 'sizeof(void *) > 4'
4858         spic=$shared
4859     ;;
4860     x86)
4861         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
4862         # Treat x32 as x64 for now. Note it also needs spic=$shared
4863         test "$subarch" = "x86_32" && check_cpp_condition stddef.h 'defined(__x86_64__)' &&
4864             subarch=x86_64
4865         if test "$subarch" = "x86_64"; then
4866             spic=$shared
4867         fi
4868     ;;
4869     ppc)