Add dependencies to configure file for vf_fftfilt
[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:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --fatal-warnings         fail if any configure warning is generated
82   --prefix=PREFIX          install in PREFIX [$prefix]
83   --bindir=DIR             install binaries in DIR [PREFIX/bin]
84   --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]
85   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]
86   --libdir=DIR             install libs in DIR [PREFIX/lib]
87   --shlibdir=DIR           install shared libs in DIR [LIBDIR]
88   --incdir=DIR             install includes in DIR [PREFIX/include]
89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
90   --enable-rpath           use rpath to allow installing libraries in paths
91                            not part of the dynamic linker search path
92                            use rpath when linking programs [USE WITH CARE]
93
94 Licensing options:
95   --enable-gpl             allow use of GPL code, the resulting libs
96                            and binaries will be under GPL [no]
97   --enable-version3        upgrade (L)GPL to version 3 [no]
98   --enable-nonfree         allow use of nonfree code, the resulting libs
99                            and binaries will be unredistributable [no]
100
101 Configuration options:
102   --disable-static         do not build static libraries [no]
103   --enable-shared          build shared libraries [no]
104   --enable-small           optimize for size instead of speed
105   --disable-runtime-cpudetect disable detecting cpu capabilities at runtime (smaller binary)
106   --enable-gray            enable full grayscale support (slower color)
107   --disable-swscale-alpha  disable alpha channel support in swscale
108   --disable-all            disable building components, libraries and programs
109   --enable-incompatible-libav-abi enable incompatible Libav fork ABI [no]
110   --enable-raise-major     increase major version numbers in sonames [no]
111
112 Program options:
113   --disable-programs       do not build command line programs
114   --disable-ffmpeg         disable ffmpeg build
115   --disable-ffplay         disable ffplay build
116   --disable-ffprobe        disable ffprobe build
117   --disable-ffserver       disable ffserver build
118
119 Documentation options:
120   --disable-doc            do not build documentation
121   --disable-htmlpages      do not build HTML documentation pages
122   --disable-manpages       do not build man documentation pages
123   --disable-podpages       do not build POD documentation pages
124   --disable-txtpages       do not build text documentation pages
125
126 Component options:
127   --disable-avdevice       disable libavdevice build
128   --disable-avcodec        disable libavcodec build
129   --disable-avformat       disable libavformat build
130   --disable-avutil         disable libavutil build
131   --disable-swresample     disable libswresample build
132   --disable-swscale        disable libswscale build
133   --disable-postproc       disable libpostproc build
134   --disable-avfilter       disable libavfilter build
135   --enable-avresample      enable libavresample build [no]
136   --disable-pthreads       disable pthreads [autodetect]
137   --disable-w32threads     disable Win32 threads [autodetect]
138   --disable-os2threads     disable OS/2 threads [autodetect]
139   --disable-network        disable network support [no]
140   --disable-dct            disable DCT code
141   --disable-dwt            disable DWT code
142   --disable-error-resilience disable error resilience code
143   --disable-lsp            disable LSP code
144   --disable-lzo            disable LZO decoder code
145   --disable-mdct           disable MDCT code
146   --disable-rdft           disable RDFT code
147   --disable-fft            disable FFT code
148   --disable-faan           disable floating point AAN (I)DCT code
149   --disable-pixelutils     disable pixel utils in libavutil
150
151 Hardware accelerators:
152   --disable-dxva2          disable DXVA2 code [autodetect]
153   --disable-vaapi          disable VAAPI code [autodetect]
154   --disable-vda            disable VDA code [autodetect]
155   --disable-vdpau          disable VDPAU code [autodetect]
156
157 Individual component options:
158   --disable-everything     disable all components listed below
159   --disable-encoder=NAME   disable encoder NAME
160   --enable-encoder=NAME    enable encoder NAME
161   --disable-encoders       disable all encoders
162   --disable-decoder=NAME   disable decoder NAME
163   --enable-decoder=NAME    enable decoder NAME
164   --disable-decoders       disable all decoders
165   --disable-hwaccel=NAME   disable hwaccel NAME
166   --enable-hwaccel=NAME    enable hwaccel NAME
167   --disable-hwaccels       disable all hwaccels
168   --disable-muxer=NAME     disable muxer NAME
169   --enable-muxer=NAME      enable muxer NAME
170   --disable-muxers         disable all muxers
171   --disable-demuxer=NAME   disable demuxer NAME
172   --enable-demuxer=NAME    enable demuxer NAME
173   --disable-demuxers       disable all demuxers
174   --enable-parser=NAME     enable parser NAME
175   --disable-parser=NAME    disable parser NAME
176   --disable-parsers        disable all parsers
177   --enable-bsf=NAME        enable bitstream filter NAME
178   --disable-bsf=NAME       disable bitstream filter NAME
179   --disable-bsfs           disable all bitstream filters
180   --enable-protocol=NAME   enable protocol NAME
181   --disable-protocol=NAME  disable protocol NAME
182   --disable-protocols      disable all protocols
183   --enable-indev=NAME      enable input device NAME
184   --disable-indev=NAME     disable input device NAME
185   --disable-indevs         disable input devices
186   --enable-outdev=NAME     enable output device NAME
187   --disable-outdev=NAME    disable output device NAME
188   --disable-outdevs        disable output devices
189   --disable-devices        disable all devices
190   --enable-filter=NAME     enable filter NAME
191   --disable-filter=NAME    disable filter NAME
192   --disable-filters        disable all filters
193
194 External library support:
195   --enable-avisynth        enable reading of AviSynth script files [no]
196   --disable-bzlib          disable bzlib [autodetect]
197   --enable-fontconfig      enable fontconfig, useful for drawtext filter [no]
198   --enable-frei0r          enable frei0r video filtering [no]
199   --enable-gnutls          enable gnutls, needed for https support
200                            if openssl is not used [no]
201   --disable-iconv          disable iconv [autodetect]
202   --enable-ladspa          enable LADSPA audio filtering [no]
203   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
204   --enable-libass          enable libass subtitles rendering,
205                            needed for subtitles and ass filter [no]
206   --enable-libbluray       enable BluRay reading using libbluray [no]
207   --enable-libbs2b         enable bs2b DSP library [no]
208   --enable-libcaca         enable textual display using libcaca [no]
209   --enable-libcelt         enable CELT decoding via libcelt [no]
210   --enable-libcdio         enable audio CD grabbing with libcdio [no]
211   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
212                            and libraw1394 [no]
213   --enable-libfaac         enable AAC encoding via libfaac [no]
214   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
215   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
216   --enable-libfreetype     enable libfreetype, needed for drawtext filter [no]
217   --enable-libfribidi      enable libfribidi, improves drawtext filter [no]
218   --enable-libgme          enable Game Music Emu via libgme [no]
219   --enable-libgsm          enable GSM de/encoding via libgsm [no]
220   --enable-libiec61883     enable iec61883 via libiec61883 [no]
221   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
222   --enable-libmfx          enable HW acceleration through libmfx
223   --enable-libmodplug      enable ModPlug via libmodplug [no]
224   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
225   --enable-libnut          enable NUT (de)muxing via libnut,
226                            native (de)muxer exists [no]
227   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
228   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
229   --enable-libopencv       enable video filtering via libopencv [no]
230   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
231   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
232   --enable-libopus         enable Opus de/encoding via libopus [no]
233   --enable-libpulse        enable Pulseaudio input via libpulse [no]
234   --enable-libquvi         enable quvi input via libquvi [no]
235   --enable-librtmp         enable RTMP[E] support via librtmp [no]
236   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
237   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
238   --enable-libsmbclient    enable Samba protocol via libsmbclient [no]
239   --enable-libsoxr         enable Include libsoxr resampling [no]
240   --enable-libspeex        enable Speex de/encoding via libspeex [no]
241   --enable-libssh          enable SFTP protocol via libssh [no]
242   --enable-libstagefright-h264  enable H.264 decoding via libstagefright [no]
243   --enable-libtheora       enable Theora encoding via libtheora [no]
244   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
245   --enable-libutvideo      enable Ut Video encoding and decoding via libutvideo [no]
246   --enable-libv4l2         enable libv4l2/v4l-utils [no]
247   --enable-libvidstab      enable video stabilization using vid.stab [no]
248   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
249   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
250   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
251                            native implementation exists [no]
252   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
253   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
254   --enable-libwebp         enable WebP encoding via libwebp [no]
255   --enable-libx264         enable H.264 encoding via x264 [no]
256   --enable-libx265         enable HEVC encoding via x265 [no]
257   --enable-libxavs         enable AVS encoding via xavs [no]
258   --enable-libxcb          enable X11 grabbing using XCB [autodetect]
259   --enable-libxcb-shm      enable X11 grabbing shm communication [autodetect]
260   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [autodetect]
261   --enable-libxcb-shape    enable X11 grabbing shape rendering [autodetect]
262   --enable-libxvid         enable Xvid encoding via xvidcore,
263                            native MPEG-4/Xvid encoder exists [no]
264   --enable-libzmq          enable message passing via libzmq [no]
265   --enable-libzvbi         enable teletext support via libzvbi [no]
266   --disable-lzma           disable lzma [autodetect]
267   --enable-decklink        enable Blackmagick DeckLink I/O support [no]
268   --enable-nvenc           enable NVIDIA NVENC support [no]
269   --enable-openal          enable OpenAL 1.1 capture support [no]
270   --enable-opencl          enable OpenCL code
271   --enable-opengl          enable OpenGL rendering [no]
272   --enable-openssl         enable openssl, needed for https support
273                            if gnutls is not used [no]
274   --disable-sdl            disable sdl [autodetect]
275   --enable-x11grab         enable X11 grabbing (legacy) [no]
276   --disable-xlib           disable xlib [autodetect]
277   --disable-zlib           disable zlib [autodetect]
278
279 Toolchain options:
280   --arch=ARCH              select architecture [$arch]
281   --cpu=CPU                select the minimum required CPU (affects
282                            instruction selection, may crash on older CPUs)
283   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
284   --progs-suffix=SUFFIX    program name suffix []
285   --enable-cross-compile   assume a cross-compiler is used
286   --sysroot=PATH           root of cross-build tree
287   --sysinclude=PATH        location of cross-build system headers
288   --target-os=OS           compiler targets OS [$target_os]
289   --target-exec=CMD        command to run executables on target
290   --target-path=DIR        path to view of build directory on target
291   --target-samples=DIR     path to samples directory on target
292   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
293   --toolchain=NAME         set tool defaults according to NAME
294   --nm=NM                  use nm tool NM [$nm_default]
295   --ar=AR                  use archive tool AR [$ar_default]
296   --as=AS                  use assembler AS [$as_default]
297   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
298   --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]
299   --cc=CC                  use C compiler CC [$cc_default]
300   --cxx=CXX                use C compiler CXX [$cxx_default]
301   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
302   --ld=LD                  use linker LD [$ld_default]
303   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
304   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
305   --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
306   --doxygen=DOXYGEN        use DOXYGEN to generate API doc [$doxygen_default]
307   --host-cc=HOSTCC         use host C compiler HOSTCC
308   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
309   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
310   --host-ld=HOSTLD         use host linker HOSTLD
311   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
312   --host-libs=HLIBS        use libs HLIBS when linking for host
313   --host-os=OS             compiler host OS [$target_os]
314   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
315   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
316   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
317   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
318   --extra-libs=ELIBS       add ELIBS [$ELIBS]
319   --extra-version=STRING   version string suffix []
320   --optflags=OPTFLAGS      override optimization-related compiler flags
321   --build-suffix=SUFFIX    library name suffix []
322   --enable-pic             build position-independent code
323   --enable-thumb           compile for Thumb instruction set
324   --enable-lto             use link-time optimization
325
326 Advanced options (experts only):
327   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
328   --disable-symver         disable symbol versioning
329   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
330   --disable-safe-bitstream-reader
331                            disable buffer boundary checking in bitreaders
332                            (faster, but may crash)
333   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
334   --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
335
336 Optimization options (experts only):
337   --disable-asm            disable all assembly optimizations
338   --disable-altivec        disable AltiVec optimizations
339   --disable-amd3dnow       disable 3DNow! optimizations
340   --disable-amd3dnowext    disable 3DNow! extended optimizations
341   --disable-mmx            disable MMX optimizations
342   --disable-mmxext         disable MMXEXT optimizations
343   --disable-sse            disable SSE optimizations
344   --disable-sse2           disable SSE2 optimizations
345   --disable-sse3           disable SSE3 optimizations
346   --disable-ssse3          disable SSSE3 optimizations
347   --disable-sse4           disable SSE4 optimizations
348   --disable-sse42          disable SSE4.2 optimizations
349   --disable-avx            disable AVX optimizations
350   --disable-xop            disable XOP optimizations
351   --disable-fma3           disable FMA3 optimizations
352   --disable-fma4           disable FMA4 optimizations
353   --disable-avx2           disable AVX2 optimizations
354   --disable-armv5te        disable armv5te optimizations
355   --disable-armv6          disable armv6 optimizations
356   --disable-armv6t2        disable armv6t2 optimizations
357   --disable-vfp            disable VFP optimizations
358   --disable-neon           disable NEON optimizations
359   --disable-inline-asm     disable use of inline assembly
360   --disable-yasm           disable use of nasm/yasm assembly
361   --disable-mipsdspr1      disable MIPS DSP ASE R1 optimizations
362   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
363   --disable-mipsfpu        disable floating point MIPS optimizations
364   --disable-fast-unaligned consider unaligned accesses slow
365
366 Developer options (useful when working on FFmpeg itself):
367   --disable-debug          disable debugging symbols
368   --enable-debug=LEVEL     set the debug level [$debuglevel]
369   --disable-optimizations  disable compiler optimizations
370   --enable-extra-warnings  enable more compiler warnings
371   --disable-stripping      disable stripping of executables and shared libraries
372   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
373                            2 causes a slowdown at runtime.
374   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
375   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
376                            leaks and errors, using the specified valgrind binary.
377                            Cannot be combined with --target-exec
378   --enable-ftrapv          Trap arithmetic overflows
379   --samples=PATH           location of test samples for FATE, if not set use
380                            \$FATE_SAMPLES at make invocation time.
381   --enable-neon-clobber-test check NEON registers for clobbering (should be
382                            used only for debugging purposes)
383   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
384                            should be used only for debugging purposes)
385   --enable-random          randomly enable/disable components
386   --disable-random
387   --enable-random=LIST     randomly enable/disable specific components or
388   --disable-random=LIST    component groups. LIST is a comma-separated list
389                            of NAME[:PROB] entries where NAME is a component
390                            (group) and PROB the probability associated with
391                            NAME (default 0.5).
392   --random-seed=VALUE      seed value for --enable/disable-random
393
394 NOTE: Object files are built at the place where configure is launched.
395 EOF
396   exit 0
397 }
398
399 quotes='""'
400
401 log(){
402     echo "$@" >> $logfile
403 }
404
405 log_file(){
406     log BEGIN $1
407     pr -n -t $1 >> $logfile
408     log END $1
409 }
410
411 echolog(){
412     log "$@"
413     echo "$@"
414 }
415
416 warn(){
417     log "WARNING: $*"
418     WARNINGS="${WARNINGS}WARNING: $*\n"
419 }
420
421 die(){
422     echolog "$@"
423     cat <<EOF
424
425 If you think configure made a mistake, make sure you are using the latest
426 version from Git.  If the latest version fails, report the problem to the
427 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
428 EOF
429     if disabled logging; then
430         cat <<EOF
431 Rerun configure with logging enabled (do not use --disable-logging), and
432 include the log this produces with your report.
433 EOF
434     else
435         cat <<EOF
436 Include the log file "$logfile" produced by configure as this will help
437 solve the problem.
438 EOF
439     fi
440     exit 1
441 }
442
443 # Avoid locale weirdness, besides we really just want to translate ASCII.
444 toupper(){
445     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
446 }
447
448 tolower(){
449     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
450 }
451
452 c_escape(){
453     echo "$*" | sed 's/["\\]/\\\0/g'
454 }
455
456 sh_quote(){
457     v=$(echo "$1" | sed "s/'/'\\\\''/g")
458     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
459     echo "$v"
460 }
461
462 cleanws(){
463     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//;s/\\r//g'
464 }
465
466 filter(){
467     pat=$1
468     shift
469     for v; do
470         eval "case $v in $pat) echo $v ;; esac"
471     done
472 }
473
474 filter_out(){
475     pat=$1
476     shift
477     for v; do
478         eval "case $v in $pat) ;; *) echo $v ;; esac"
479     done
480 }
481
482 map(){
483     m=$1
484     shift
485     for v; do eval $m; done
486 }
487
488 add_suffix(){
489     suffix=$1
490     shift
491     for v; do echo ${v}${suffix}; done
492 }
493
494 set_all(){
495     value=$1
496     shift
497     for var in $*; do
498         eval $var=$value
499     done
500 }
501
502 set_weak(){
503     value=$1
504     shift
505     for var; do
506         eval : \${$var:=$value}
507     done
508 }
509
510 sanitize_var_name(){
511     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
512 }
513
514 set_safe(){
515     var=$1
516     shift
517     eval $(sanitize_var_name "$var")='$*'
518 }
519
520 get_safe(){
521     eval echo \$$(sanitize_var_name "$1")
522 }
523
524 pushvar(){
525     for pvar in $*; do
526         eval level=\${${pvar}_level:=0}
527         eval ${pvar}_${level}="\$$pvar"
528         eval ${pvar}_level=$(($level+1))
529     done
530 }
531
532 popvar(){
533     for pvar in $*; do
534         eval level=\${${pvar}_level:-0}
535         test $level = 0 && continue
536         eval level=$(($level-1))
537         eval $pvar="\${${pvar}_${level}}"
538         eval ${pvar}_level=$level
539         eval unset ${pvar}_${level}
540     done
541 }
542
543 enable(){
544     set_all yes $*
545 }
546
547 disable(){
548     set_all no $*
549 }
550
551 enable_weak(){
552     set_weak yes $*
553 }
554
555 disable_weak(){
556     set_weak no $*
557 }
558
559 enable_safe(){
560     for var; do
561         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
562     done
563 }
564
565 disable_safe(){
566     for var; do
567         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
568     done
569 }
570
571 do_enable_deep(){
572     for var; do
573         enabled $var && continue
574         eval sel="\$${var}_select"
575         eval sgs="\$${var}_suggest"
576         pushvar var sgs
577         enable_deep $sel
578         popvar sgs
579         enable_deep_weak $sgs
580         popvar var
581     done
582 }
583
584 enable_deep(){
585     do_enable_deep $*
586     enable $*
587 }
588
589 enable_deep_weak(){
590     for var; do
591         disabled $var && continue
592         pushvar var
593         do_enable_deep $var
594         popvar var
595         enable_weak $var
596     done
597 }
598
599 enabled(){
600     test "${1#!}" = "$1" && op== || op=!=
601     eval test "x\$${1#!}" $op "xyes"
602 }
603
604 disabled(){
605     test "${1#!}" = "$1" && op== || op=!=
606     eval test "x\$${1#!}" $op "xno"
607 }
608
609 enabled_all(){
610     for opt; do
611         enabled $opt || return 1
612     done
613 }
614
615 disabled_all(){
616     for opt; do
617         disabled $opt || return 1
618     done
619 }
620
621 enabled_any(){
622     for opt; do
623         enabled $opt && return 0
624     done
625 }
626
627 disabled_any(){
628     for opt; do
629         disabled $opt && return 0
630     done
631     return 1
632 }
633
634 set_default(){
635     for opt; do
636         eval : \${$opt:=\$${opt}_default}
637     done
638 }
639
640 is_in(){
641     value=$1
642     shift
643     for var in $*; do
644         [ $var = $value ] && return 0
645     done
646     return 1
647 }
648
649 do_check_deps(){
650     for cfg; do
651         cfg="${cfg#!}"
652         enabled ${cfg}_checking && die "Circular dependency for $cfg."
653         disabled ${cfg}_checking && continue
654         enable ${cfg}_checking
655         append allopts $cfg
656
657         eval dep_all="\$${cfg}_deps"
658         eval dep_any="\$${cfg}_deps_any"
659         eval dep_sel="\$${cfg}_select"
660         eval dep_sgs="\$${cfg}_suggest"
661         eval dep_ifa="\$${cfg}_if"
662         eval dep_ifn="\$${cfg}_if_any"
663
664         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
665         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
666         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
667
668         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
669         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
670         enabled_all  $dep_all || disable $cfg
671         enabled_any  $dep_any || disable $cfg
672         disabled_any $dep_sel && disable $cfg
673
674         if enabled $cfg; then
675             enable_deep $dep_sel
676             enable_deep_weak $dep_sgs
677         fi
678
679         disable ${cfg}_checking
680     done
681 }
682
683 check_deps(){
684     unset allopts
685
686     do_check_deps "$@"
687
688     for cfg in $allopts; do
689         enabled $cfg || continue
690         eval dep_extralibs="\$${cfg}_extralibs"
691         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
692     done
693 }
694
695 print_config(){
696     pfx=$1
697     files=$2
698     shift 2
699     map 'eval echo "$v \${$v:-no}"' "$@" |
700     awk "BEGIN { split(\"$files\", files) }
701         {
702             c = \"$pfx\" toupper(\$1);
703             v = \$2;
704             sub(/yes/, 1, v);
705             sub(/no/,  0, v);
706             for (f in files) {
707                 file = files[f];
708                 if (file ~ /\\.h\$/) {
709                     printf(\"#define %s %d\\n\", c, v) >>file;
710                 } else if (file ~ /\\.asm\$/) {
711                     printf(\"%%define %s %d\\n\", c, v) >>file;
712                 } else if (file ~ /\\.mak\$/) {
713                     n = -v ? \"\" : \"!\";
714                     printf(\"%s%s=yes\\n\", n, c) >>file;
715                 } else if (file ~ /\\.texi\$/) {
716                     pre = -v ? \"\" : \"@c \";
717                     yesno = \$2;
718                     c2 = tolower(c);
719                     gsub(/_/, \"-\", c2);
720                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
721                 }
722             }
723         }"
724 }
725
726 print_enabled(){
727     suf=$1
728     shift
729     for v; do
730         enabled $v && printf "%s\n" ${v%$suf};
731     done
732 }
733
734 append(){
735     var=$1
736     shift
737     eval "$var=\"\$$var $*\""
738 }
739
740 prepend(){
741     var=$1
742     shift
743     eval "$var=\"$* \$$var\""
744 }
745
746 unique(){
747     var=$1
748     uniq_list=""
749     for tok in $(eval echo \$$var); do
750         uniq_list="$(filter_out $tok $uniq_list) $tok"
751     done
752     eval "$var=\"${uniq_list}\""
753 }
754
755 add_cppflags(){
756     append CPPFLAGS "$@"
757 }
758
759 add_cflags(){
760     append CFLAGS $($cflags_filter "$@")
761 }
762
763 add_cxxflags(){
764     append CXXFLAGS $($cflags_filter "$@")
765 }
766
767 add_asflags(){
768     append ASFLAGS $($asflags_filter "$@")
769 }
770
771 add_ldflags(){
772     append LDFLAGS $($ldflags_filter "$@")
773 }
774
775 add_ldexeflags(){
776     append LDEXEFLAGS $($ldflags_filter "$@")
777 }
778
779 add_stripflags(){
780     append ASMSTRIPFLAGS "$@"
781 }
782
783 add_extralibs(){
784     prepend extralibs $($ldflags_filter "$@")
785 }
786
787 add_host_cppflags(){
788     append host_cppflags "$@"
789 }
790
791 add_host_cflags(){
792     append host_cflags $($host_cflags_filter "$@")
793 }
794
795 add_host_ldflags(){
796     append host_ldflags $($host_ldflags_filter "$@")
797 }
798
799 add_compat(){
800     append compat_objs $1
801     shift
802     map 'add_cppflags -D$v' "$@"
803 }
804
805 check_cmd(){
806     log "$@"
807     "$@" >> $logfile 2>&1
808 }
809
810 check_stat(){
811     log check_stat "$@"
812     stat "$1" >> $logfile 2>&1
813 }
814
815 cc_o(){
816     eval printf '%s\\n' $CC_O
817 }
818
819 cc_e(){
820     eval printf '%s\\n' $CC_E
821 }
822
823 check_cc(){
824     log check_cc "$@"
825     cat > $TMPC
826     log_file $TMPC
827     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
828 }
829
830 check_cxx(){
831     log check_cxx "$@"
832     cat > $TMPCPP
833     log_file $TMPCPP
834     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
835 }
836
837 check_oc(){
838     log check_oc "$@"
839     cat > $TMPM
840     log_file $TMPM
841     check_cmd $cc -Werror=missing-prototypes $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPM
842 }
843
844 check_cpp(){
845     log check_cpp "$@"
846     cat > $TMPC
847     log_file $TMPC
848     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
849 }
850
851 as_o(){
852     eval printf '%s\\n' $AS_O
853 }
854
855 check_as(){
856     log check_as "$@"
857     cat > $TMPS
858     log_file $TMPS
859     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
860 }
861
862 check_inline_asm(){
863     log check_inline_asm "$@"
864     name="$1"
865     code="$2"
866     shift 2
867     disable $name
868     check_cc "$@" <<EOF && enable $name
869 void foo(void){ __asm__ volatile($code); }
870 EOF
871 }
872
873 check_insn(){
874     log check_insn "$@"
875     check_inline_asm ${1}_inline "\"$2\""
876     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
877 }
878
879 check_yasm(){
880     log check_yasm "$@"
881     echo "$1" > $TMPS
882     log_file $TMPS
883     shift 1
884     check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS
885 }
886
887 ld_o(){
888     eval printf '%s\\n' $LD_O
889 }
890
891 check_ld(){
892     log check_ld "$@"
893     type=$1
894     shift 1
895     flags=$(filter_out '-l*|*.so' $@)
896     libs=$(filter '-l*|*.so' $@)
897     check_$type $($cflags_filter $flags) || return
898     flags=$($ldflags_filter $flags)
899     libs=$($ldflags_filter $libs)
900     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
901 }
902
903 print_include(){
904     hdr=$1
905     test "${hdr%.h}" = "${hdr}" &&
906         echo "#include $hdr"    ||
907         echo "#include <$hdr>"
908 }
909
910 check_code(){
911     log check_code "$@"
912     check=$1
913     headers=$2
914     code=$3
915     shift 3
916     {
917         for hdr in $headers; do
918             print_include $hdr
919         done
920         echo "int main(void) { $code; return 0; }"
921     } | check_$check "$@"
922 }
923
924 check_cppflags(){
925     log check_cppflags "$@"
926     check_cc "$@" <<EOF && append CPPFLAGS "$@"
927 int x;
928 EOF
929 }
930
931 test_cflags(){
932     log test_cflags "$@"
933     set -- $($cflags_filter "$@")
934     check_cc "$@" <<EOF
935 int x;
936 EOF
937 }
938
939 check_cflags(){
940     log check_cflags "$@"
941     test_cflags "$@" && add_cflags "$@"
942 }
943
944 check_cxxflags(){
945     log check_cxxflags "$@"
946     set -- $($cflags_filter "$@")
947     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
948 int x;
949 EOF
950 }
951
952 test_ldflags(){
953     log test_ldflags "$@"
954     check_ld "cc" "$@" <<EOF
955 int main(void){ return 0; }
956 EOF
957 }
958
959 check_ldflags(){
960     log check_ldflags "$@"
961     test_ldflags "$@" && add_ldflags "$@"
962 }
963
964 test_stripflags(){
965     log test_stripflags "$@"
966     # call check_cc to get a fresh TMPO
967     check_cc <<EOF
968 int main(void) { return 0; }
969 EOF
970     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
971 }
972
973 check_stripflags(){
974     log check_stripflags "$@"
975     test_stripflags "$@" && add_stripflags "$@"
976 }
977
978 check_header(){
979     log check_header "$@"
980     header=$1
981     shift
982     disable_safe $header
983     check_cpp "$@" <<EOF && enable_safe $header
984 #include <$header>
985 int x;
986 EOF
987 }
988
989 check_header_oc(){
990     log check_header_oc "$@"
991     rm -f -- "$TMPO"
992     header=$1
993     shift
994     disable_safe $header
995     {
996        echo "#include <$header>"
997        echo "int main(void) { return 0; }"
998     } | check_oc && check_stat "$TMPO" && enable_safe $headers
999 }
1000
1001 check_func(){
1002     log check_func "$@"
1003     func=$1
1004     shift
1005     disable $func
1006     check_ld "cc" "$@" <<EOF && enable $func
1007 extern int $func();
1008 int main(void){ $func(); }
1009 EOF
1010 }
1011
1012 check_mathfunc(){
1013     log check_mathfunc "$@"
1014     func=$1
1015     narg=$2
1016     shift 2
1017     test $narg = 2 && args="f, g" || args="f"
1018     disable $func
1019     check_ld "cc" "$@" <<EOF && enable $func
1020 #include <math.h>
1021 float foo(float f, float g) { return $func($args); }
1022 int main(void){ return (int) foo; }
1023 EOF
1024 }
1025
1026 check_func_headers(){
1027     log check_func_headers "$@"
1028     headers=$1
1029     funcs=$2
1030     shift 2
1031     {
1032         for hdr in $headers; do
1033             print_include $hdr
1034         done
1035         for func in $funcs; do
1036             echo "long check_$func(void) { return (long) $func; }"
1037         done
1038         echo "int main(void) { return 0; }"
1039     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
1040 }
1041
1042 check_class_headers_cpp(){
1043     log check_class_headers_cpp "$@"
1044     headers=$1
1045     classes=$2
1046     shift 2
1047     {
1048         for hdr in $headers; do
1049             echo "#include <$hdr>"
1050         done
1051         echo "int main(void) { "
1052         i=1
1053         for class in $classes; do
1054             echo "$class obj$i;"
1055             i=$(expr $i + 1)
1056         done
1057         echo "return 0; }"
1058     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
1059 }
1060
1061 check_cpp_condition(){
1062     log check_cpp_condition "$@"
1063     header=$1
1064     condition=$2
1065     shift 2
1066     check_cpp "$@" <<EOF
1067 #include <$header>
1068 #if !($condition)
1069 #error "unsatisfied condition: $condition"
1070 #endif
1071 EOF
1072 }
1073
1074 check_lib(){
1075     log check_lib "$@"
1076     header="$1"
1077     func="$2"
1078     shift 2
1079     check_header $header && check_func $func "$@" && add_extralibs "$@"
1080 }
1081
1082 check_lib2(){
1083     log check_lib2 "$@"
1084     headers="$1"
1085     funcs="$2"
1086     shift 2
1087     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1088 }
1089
1090 check_lib_cpp(){
1091     log check_lib_cpp "$@"
1092     headers="$1"
1093     classes="$2"
1094     shift 2
1095     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1096 }
1097
1098 check_pkg_config(){
1099     log check_pkg_config "$@"
1100     pkgandversion="$1"
1101     pkg="${1%% *}"
1102     headers="$2"
1103     funcs="$3"
1104     shift 3
1105     check_cmd $pkg_config --exists --print-errors $pkgandversion || return
1106     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1107     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1108     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1109         set_safe ${pkg}_cflags $pkg_cflags   &&
1110         set_safe ${pkg}_libs   $pkg_libs
1111 }
1112
1113 check_exec(){
1114     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1115 }
1116
1117 check_exec_crash(){
1118     code=$(cat)
1119
1120     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1121     # are safe but may not be available everywhere.  Thus we use
1122     # raise(SIGTERM) instead.  The check is run in a subshell so we
1123     # can redirect the "Terminated" message from the shell.  SIGBUS
1124     # is not defined by standard C so it is used conditionally.
1125
1126     (check_exec "$@") >> $logfile 2>&1 <<EOF
1127 #include <signal.h>
1128 static void sighandler(int sig){
1129     raise(SIGTERM);
1130 }
1131 int foo(void){
1132     $code
1133 }
1134 int (*func_ptr)(void) = foo;
1135 int main(void){
1136     signal(SIGILL, sighandler);
1137     signal(SIGFPE, sighandler);
1138     signal(SIGSEGV, sighandler);
1139 #ifdef SIGBUS
1140     signal(SIGBUS, sighandler);
1141 #endif
1142     return func_ptr();
1143 }
1144 EOF
1145 }
1146
1147 check_type(){
1148     log check_type "$@"
1149     headers=$1
1150     type=$2
1151     shift 2
1152     disable_safe "$type"
1153     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1154 }
1155
1156 check_struct(){
1157     log check_struct "$@"
1158     headers=$1
1159     struct=$2
1160     member=$3
1161     shift 3
1162     disable_safe "${struct}_${member}"
1163     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1164         enable_safe "${struct}_${member}"
1165 }
1166
1167 check_builtin(){
1168     log check_builtin "$@"
1169     name=$1
1170     headers=$2
1171     builtin=$3
1172     shift 3
1173     disable "$name"
1174     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1175 }
1176
1177 check_compile_assert(){
1178     log check_compile_assert "$@"
1179     name=$1
1180     headers=$2
1181     condition=$3
1182     shift 3
1183     disable "$name"
1184     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1185 }
1186
1187 require(){
1188     name="$1"
1189     header="$2"
1190     func="$3"
1191     shift 3
1192     check_lib $header $func "$@" || die "ERROR: $name not found"
1193 }
1194
1195 require2(){
1196     name="$1"
1197     headers="$2"
1198     func="$3"
1199     shift 3
1200     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1201 }
1202
1203 require_cpp(){
1204     name="$1"
1205     headers="$2"
1206     classes="$3"
1207     shift 3
1208     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1209 }
1210
1211 use_pkg_config(){
1212     pkg="$1"
1213     check_pkg_config "$@" || return 1
1214     add_cflags    $(get_safe ${pkg}_cflags)
1215     add_extralibs $(get_safe ${pkg}_libs)
1216 }
1217
1218 require_pkg_config(){
1219     use_pkg_config "$@" || die "ERROR: $pkg not found using pkg-config$pkg_config_fail_message"
1220 }
1221
1222 require_libfreetype(){
1223     log require_libfreetype "$@"
1224     pkg="freetype2"
1225     check_cmd $pkg_config --exists --print-errors $pkg \
1226       || die "ERROR: $pkg not found"
1227     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1228     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1229     {
1230         echo "#include <ft2build.h>"
1231         echo "#include FT_FREETYPE_H"
1232         echo "long check_func(void) { return (long) FT_Init_FreeType; }"
1233         echo "int main(void) { return 0; }"
1234     } | check_ld "cc" $pkg_cflags $pkg_libs \
1235       && set_safe ${pkg}_cflags $pkg_cflags \
1236       && set_safe ${pkg}_libs   $pkg_libs \
1237       || die "ERROR: $pkg not found"
1238     add_cflags    $(get_safe ${pkg}_cflags)
1239     add_extralibs $(get_safe ${pkg}_libs)
1240 }
1241
1242 hostcc_e(){
1243     eval printf '%s\\n' $HOSTCC_E
1244 }
1245
1246 hostcc_o(){
1247     eval printf '%s\\n' $HOSTCC_O
1248 }
1249
1250 check_host_cc(){
1251     log check_host_cc "$@"
1252     cat > $TMPC
1253     log_file $TMPC
1254     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1255 }
1256
1257 check_host_cpp(){
1258     log check_host_cpp "$@"
1259     cat > $TMPC
1260     log_file $TMPC
1261     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1262 }
1263
1264 check_host_cppflags(){
1265     log check_host_cppflags "$@"
1266     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1267 int x;
1268 EOF
1269 }
1270
1271 check_host_cflags(){
1272     log check_host_cflags "$@"
1273     set -- $($host_cflags_filter "$@")
1274     check_host_cc "$@" <<EOF && append host_cflags "$@"
1275 int x;
1276 EOF
1277 }
1278
1279 check_host_cpp_condition(){
1280     log check_host_cpp_condition "$@"
1281     header=$1
1282     condition=$2
1283     shift 2
1284     check_host_cpp "$@" <<EOF
1285 #include <$header>
1286 #if !($condition)
1287 #error "unsatisfied condition: $condition"
1288 #endif
1289 EOF
1290 }
1291
1292 apply(){
1293     file=$1
1294     shift
1295     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1296 }
1297
1298 cp_if_changed(){
1299     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1300     mkdir -p "$(dirname $2)"
1301     $cp_f "$1" "$2"
1302 }
1303
1304 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1305 # system-dependent things.
1306
1307 COMPONENT_LIST="
1308     bsfs
1309     decoders
1310     demuxers
1311     encoders
1312     filters
1313     hwaccels
1314     indevs
1315     muxers
1316     outdevs
1317     parsers
1318     protocols
1319 "
1320
1321 EXAMPLE_LIST="
1322     avio_reading_example
1323     decoding_encoding_example
1324     demuxing_decoding_example
1325     extract_mvs_example
1326     filter_audio_example
1327     filtering_audio_example
1328     filtering_video_example
1329     metadata_example
1330     muxing_example
1331     qsvdec_example
1332     remuxing_example
1333     resampling_audio_example
1334     scaling_video_example
1335     transcode_aac_example
1336     transcoding_example
1337 "
1338
1339 EXTERNAL_LIBRARY_LIST="
1340     avisynth
1341     bzlib
1342     crystalhd
1343     decklink
1344     frei0r
1345     gnutls
1346     iconv
1347     ladspa
1348     libaacplus
1349     libass
1350     libbluray
1351     libbs2b
1352     libcaca
1353     libcdio
1354     libcelt
1355     libdc1394
1356     libfaac
1357     libfdk_aac
1358     libflite
1359     libfontconfig
1360     libfreetype
1361     libfribidi
1362     libgme
1363     libgsm
1364     libiec61883
1365     libilbc
1366     libmfx
1367     libmodplug
1368     libmp3lame
1369     libnut
1370     libopencore_amrnb
1371     libopencore_amrwb
1372     libopencv
1373     libopenh264
1374     libopenjpeg
1375     libopus
1376     libpulse
1377     libquvi
1378     librtmp
1379     libschroedinger
1380     libshine
1381     libsmbclient
1382     libsoxr
1383     libspeex
1384     libssh
1385     libstagefright_h264
1386     libtheora
1387     libtwolame
1388     libutvideo
1389     libv4l2
1390     libvidstab
1391     libvo_aacenc
1392     libvo_amrwbenc
1393     libvorbis
1394     libvpx
1395     libwavpack
1396     libwebp
1397     libx264
1398     libx265
1399     libxavs
1400     libxcb
1401     libxcb_shm
1402     libxcb_shape
1403     libxcb_xfixes
1404     libxvid
1405     libzmq
1406     libzvbi
1407     lzma
1408     nvenc
1409     openal
1410     opencl
1411     opengl
1412     openssl
1413     sdl
1414     x11grab
1415     xlib
1416     zlib
1417 "
1418
1419 DOCUMENT_LIST="
1420     doc
1421     htmlpages
1422     manpages
1423     podpages
1424     txtpages
1425 "
1426
1427 FEATURE_LIST="
1428     ftrapv
1429     gray
1430     hardcoded_tables
1431     runtime_cpudetect
1432     safe_bitstream_reader
1433     shared
1434     small
1435     static
1436     swscale_alpha
1437 "
1438
1439 HWACCEL_LIST="
1440     dxva2
1441     vaapi
1442     vda
1443     vdpau
1444     xvmc
1445 "
1446
1447 LIBRARY_LIST="
1448     avcodec
1449     avdevice
1450     avfilter
1451     avformat
1452     avresample
1453     avutil
1454     postproc
1455     swresample
1456     swscale
1457 "
1458
1459 LICENSE_LIST="
1460     gpl
1461     nonfree
1462     version3
1463 "
1464
1465 PROGRAM_LIST="
1466     ffplay
1467     ffprobe
1468     ffserver
1469     ffmpeg
1470 "
1471
1472 SUBSYSTEM_LIST="
1473     dct
1474     dwt
1475     error_resilience
1476     faan
1477     fast_unaligned
1478     fft
1479     lsp
1480     lzo
1481     mdct
1482     pixelutils
1483     network
1484     qsv
1485     rdft
1486 "
1487
1488 CONFIG_LIST="
1489     $COMPONENT_LIST
1490     $DOCUMENT_LIST
1491     $EXAMPLE_LIST
1492     $EXTERNAL_LIBRARY_LIST
1493     $FEATURE_LIST
1494     $HWACCEL_LIST
1495     $LICENSE_LIST
1496     $LIBRARY_LIST
1497     $PROGRAM_LIST
1498     $SUBSYSTEM_LIST
1499     fontconfig
1500     incompatible_libav_abi
1501     memalign_hack
1502     memory_poisoning
1503     neon_clobber_test
1504     pic
1505     pod2man
1506     raise_major
1507     thumb
1508     xmm_clobber_test
1509 "
1510
1511 THREADS_LIST="
1512     pthreads
1513     os2threads
1514     w32threads
1515 "
1516
1517 ATOMICS_LIST="
1518     atomics_gcc
1519     atomics_suncc
1520     atomics_win32
1521 "
1522
1523 ARCH_LIST="
1524     aarch64
1525     alpha
1526     arm
1527     avr32
1528     avr32_ap
1529     avr32_uc
1530     bfin
1531     ia64
1532     m68k
1533     mips
1534     mips64
1535     parisc
1536     ppc
1537     ppc64
1538     s390
1539     sh4
1540     sparc
1541     sparc64
1542     tilegx
1543     tilepro
1544     tomi
1545     x86
1546     x86_32
1547     x86_64
1548 "
1549
1550 ARCH_EXT_LIST_ARM="
1551     armv5te
1552     armv6
1553     armv6t2
1554     armv8
1555     neon
1556     vfp
1557     vfpv3
1558     setend
1559 "
1560
1561 ARCH_EXT_LIST_MIPS="
1562     mipsfpu
1563     mips32r2
1564     mipsdspr1
1565     mipsdspr2
1566 "
1567
1568 ARCH_EXT_LIST_X86_SIMD="
1569     amd3dnow
1570     amd3dnowext
1571     avx
1572     avx2
1573     fma3
1574     fma4
1575     mmx
1576     mmxext
1577     sse
1578     sse2
1579     sse3
1580     sse4
1581     sse42
1582     ssse3
1583     xop
1584 "
1585
1586 ARCH_EXT_LIST_PPC="
1587     altivec
1588     dcbzl
1589     ldbrx
1590     ppc4xx
1591     vsx
1592 "
1593
1594 ARCH_EXT_LIST_X86="
1595     $ARCH_EXT_LIST_X86_SIMD
1596     cpunop
1597     i686
1598 "
1599
1600 ARCH_EXT_LIST="
1601     $ARCH_EXT_LIST_ARM
1602     $ARCH_EXT_LIST_PPC
1603     $ARCH_EXT_LIST_X86
1604     $ARCH_EXT_LIST_MIPS
1605     loongson
1606 "
1607
1608 ARCH_FEATURES="
1609     aligned_stack
1610     fast_64bit
1611     fast_clz
1612     fast_cmov
1613     local_aligned_8
1614     local_aligned_16
1615     local_aligned_32
1616     simd_align_16
1617 "
1618
1619 BUILTIN_LIST="
1620     atomic_cas_ptr
1621     atomic_compare_exchange
1622     machine_rw_barrier
1623     MemoryBarrier
1624     mm_empty
1625     rdtsc
1626     sarestart
1627     sync_val_compare_and_swap
1628 "
1629 HAVE_LIST_CMDLINE="
1630     inline_asm
1631     symver
1632     yasm
1633 "
1634
1635 HAVE_LIST_PUB="
1636     bigendian
1637     fast_unaligned
1638     incompatible_libav_abi
1639 "
1640
1641 HEADERS_LIST="
1642     alsa_asoundlib_h
1643     altivec_h
1644     arpa_inet_h
1645     asm_types_h
1646     cdio_paranoia_h
1647     cdio_paranoia_paranoia_h
1648     dev_bktr_ioctl_bt848_h
1649     dev_bktr_ioctl_meteor_h
1650     dev_ic_bt8xx_h
1651     dev_video_bktr_ioctl_bt848_h
1652     dev_video_meteor_ioctl_meteor_h
1653     direct_h
1654     dlfcn_h
1655     dxva_h
1656     ES2_gl_h
1657     gsm_h
1658     io_h
1659     mach_mach_time_h
1660     machine_ioctl_bt848_h
1661     machine_ioctl_meteor_h
1662     malloc_h
1663     openjpeg_1_5_openjpeg_h
1664     OpenGL_gl3_h
1665     poll_h
1666     sndio_h
1667     soundcard_h
1668     sys_mman_h
1669     sys_param_h
1670     sys_resource_h
1671     sys_select_h
1672     sys_soundcard_h
1673     sys_time_h
1674     sys_un_h
1675     sys_videoio_h
1676     termios_h
1677     udplite_h
1678     unistd_h
1679     windows_h
1680     winsock2_h
1681 "
1682
1683 INTRINSICS_LIST="
1684     intrinsics_neon
1685 "
1686
1687 MATH_FUNCS="
1688     atanf
1689     atan2f
1690     cbrt
1691     cbrtf
1692     cosf
1693     exp2
1694     exp2f
1695     expf
1696     isinf
1697     isnan
1698     ldexpf
1699     llrint
1700     llrintf
1701     log2
1702     log2f
1703     log10f
1704     lrint
1705     lrintf
1706     powf
1707     rint
1708     round
1709     roundf
1710     sinf
1711     trunc
1712     truncf
1713 "
1714
1715 SYSTEM_FUNCS="
1716     access
1717     aligned_malloc
1718     clock_gettime
1719     closesocket
1720     CommandLineToArgvW
1721     CoTaskMemFree
1722     CryptGenRandom
1723     dlopen
1724     fcntl
1725     flt_lim
1726     fork
1727     getaddrinfo
1728     gethrtime
1729     getopt
1730     GetProcessAffinityMask
1731     GetProcessMemoryInfo
1732     GetProcessTimes
1733     getrusage
1734     getservbyport
1735     GetSystemTimeAsFileTime
1736     gettimeofday
1737     glob
1738     glXGetProcAddress
1739     gmtime_r
1740     inet_aton
1741     isatty
1742     jack_port_get_latency_range
1743     kbhit
1744     localtime_r
1745     lzo1x_999_compress
1746     mach_absolute_time
1747     MapViewOfFile
1748     memalign
1749     mkstemp
1750     mmap
1751     mprotect
1752     nanosleep
1753     PeekNamedPipe
1754     posix_memalign
1755     pthread_cancel
1756     sched_getaffinity
1757     SetConsoleTextAttribute
1758     setmode
1759     setrlimit
1760     Sleep
1761     strerror_r
1762     sysconf
1763     sysctl
1764     usleep
1765     VirtualAlloc
1766     wglGetProcAddress
1767 "
1768
1769 TOOLCHAIN_FEATURES="
1770     as_dn_directive
1771     as_func
1772     as_object_arch
1773     asm_mod_q
1774     attribute_may_alias
1775     attribute_packed
1776     ebp_available
1777     ebx_available
1778     gnu_as
1779     gnu_windres
1780     ibm_asm
1781     inline_asm_labels
1782     inline_asm_nonlocal_labels
1783     inline_asm_direct_symbol_refs
1784     pragma_deprecated
1785     rsync_contimeout
1786     symver_asm_label
1787     symver_gnu_asm
1788     vfp_args
1789     xform_asm
1790     xmm_clobbers
1791 "
1792
1793 TYPES_LIST="
1794     CONDITION_VARIABLE_Ptr
1795     DXVA_PicParams_HEVC
1796     socklen_t
1797     struct_addrinfo
1798     struct_group_source_req
1799     struct_ip_mreq_source
1800     struct_ipv6_mreq
1801     struct_pollfd
1802     struct_rusage_ru_maxrss
1803     struct_sctp_event_subscribe
1804     struct_sockaddr_in6
1805     struct_sockaddr_sa_len
1806     struct_sockaddr_storage
1807     struct_stat_st_mtim_tv_nsec
1808     struct_v4l2_frmivalenum_discrete
1809 "
1810
1811 HAVE_LIST="
1812     $ARCH_EXT_LIST
1813     $(add_suffix _external $ARCH_EXT_LIST)
1814     $(add_suffix _inline   $ARCH_EXT_LIST)
1815     $ARCH_FEATURES
1816     $ATOMICS_LIST
1817     $BUILTIN_LIST
1818     $HAVE_LIST_CMDLINE
1819     $HAVE_LIST_PUB
1820     $HEADERS_LIST
1821     $INTRINSICS_LIST
1822     $MATH_FUNCS
1823     $SYSTEM_FUNCS
1824     $THREADS_LIST
1825     $TOOLCHAIN_FEATURES
1826     $TYPES_LIST
1827     atomics_native
1828     dos_paths
1829     dxva2api_cobj
1830     dxva2_lib
1831     libc_msvcrt
1832     libdc1394_1
1833     libdc1394_2
1834     makeinfo
1835     makeinfo_html
1836     perl
1837     pod2man
1838     sdl
1839     section_data_rel_ro
1840     texi2html
1841     threads
1842     vaapi_x11
1843     vdpau_x11
1844     xlib
1845 "
1846
1847 # options emitted with CONFIG_ prefix but not available on the command line
1848 CONFIG_EXTRA="
1849     aandcttables
1850     ac3dsp
1851     audio_frame_queue
1852     audiodsp
1853     blockdsp
1854     bswapdsp
1855     cabac
1856     dvprofile
1857     exif
1858     faandct
1859     faanidct
1860     fdctdsp
1861     fmtconvert
1862     frame_thread_encoder
1863     gcrypt
1864     golomb
1865     gplv3
1866     h263dsp
1867     h264chroma
1868     h264dsp
1869     h264pred
1870     h264qpel
1871     hpeldsp
1872     huffman
1873     huffyuvdsp
1874     huffyuvencdsp
1875     idctdsp
1876     iirfilter
1877     imdct15
1878     intrax8
1879     lgplv3
1880     llauddsp
1881     llviddsp
1882     lpc
1883     me_cmp
1884     mpeg_er
1885     mpegaudio
1886     mpegaudiodsp
1887     mpegvideo
1888     mpegvideoenc
1889     nettle
1890     pixblockdsp
1891     qpeldsp
1892     rangecoder
1893     riffdec
1894     riffenc
1895     rtpdec
1896     rtpenc_chain
1897     sinewin
1898     startcode
1899     tpeldsp
1900     videodsp
1901     vp3dsp
1902     wma_freqs
1903 "
1904
1905 CMDLINE_SELECT="
1906     $ARCH_EXT_LIST
1907     $CONFIG_LIST
1908     $HAVE_LIST_CMDLINE
1909     $THREADS_LIST
1910     asm
1911     cross_compile
1912     debug
1913     extra_warnings
1914     logging
1915     lto
1916     optimizations
1917     rpath
1918     stripping
1919 "
1920
1921 PATHS_LIST="
1922     bindir
1923     datadir
1924     docdir
1925     incdir
1926     libdir
1927     mandir
1928     prefix
1929     shlibdir
1930 "
1931
1932 CMDLINE_SET="
1933     $PATHS_LIST
1934     ar
1935     arch
1936     as
1937     assert_level
1938     build_suffix
1939     cc
1940     cpu
1941     cross_prefix
1942     cxx
1943     dep_cc
1944     doxygen
1945     extra_version
1946     gas
1947     host_cc
1948     host_cflags
1949     host_ld
1950     host_ldflags
1951     host_libs
1952     host_os
1953     install
1954     ld
1955     logfile
1956     malloc_prefix
1957     nm
1958     optflags
1959     pkg_config
1960     pkg_config_flags
1961     progs_suffix
1962     random_seed
1963     ranlib
1964     samples
1965     strip
1966     sws_max_filter_size
1967     sysinclude
1968     sysroot
1969     target_exec
1970     target_os
1971     target_path
1972     target_samples
1973     tempprefix
1974     toolchain
1975     valgrind
1976     yasmexe
1977 "
1978
1979 CMDLINE_APPEND="
1980     extra_cflags
1981     extra_cxxflags
1982     host_cppflags
1983 "
1984
1985 # code dependency declarations
1986
1987 # architecture extensions
1988
1989 armv5te_deps="arm"
1990 armv6_deps="arm"
1991 armv6t2_deps="arm"
1992 armv8_deps="aarch64"
1993 neon_deps_any="aarch64 arm"
1994 intrinsics_neon_deps="neon"
1995 vfp_deps_any="aarch64 arm"
1996 vfpv3_deps="vfp"
1997 setend_deps="arm"
1998
1999 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
2000
2001 mipsfpu_deps="mips"
2002 mipsdspr1_deps="mips"
2003 mipsdspr2_deps="mips"
2004
2005 altivec_deps="ppc"
2006 ppc4xx_deps="ppc"
2007 vsx_deps="ppc"
2008
2009 cpunop_deps="i686"
2010 x86_64_select="i686"
2011 x86_64_suggest="fast_cmov"
2012
2013 amd3dnow_deps="mmx"
2014 amd3dnowext_deps="amd3dnow"
2015 i686_deps="x86"
2016 mmx_deps="x86"
2017 mmxext_deps="mmx"
2018 sse_deps="mmxext"
2019 sse2_deps="sse"
2020 sse3_deps="sse2"
2021 ssse3_deps="sse3"
2022 sse4_deps="ssse3"
2023 sse42_deps="sse4"
2024 avx_deps="sse42"
2025 xop_deps="avx"
2026 fma3_deps="avx"
2027 fma4_deps="avx"
2028 avx2_deps="avx"
2029
2030 mmx_external_deps="yasm"
2031 mmx_inline_deps="inline_asm"
2032 mmx_suggest="mmx_external mmx_inline"
2033
2034 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2035     eval dep=\$${ext}_deps
2036     eval ${ext}_external_deps='"${dep}_external"'
2037     eval ${ext}_inline_deps='"${dep}_inline"'
2038     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2039 done
2040
2041 aligned_stack_if_any="aarch64 ppc x86"
2042 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2043 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2044 fast_unaligned_if_any="aarch64 ppc x86"
2045 simd_align_16_if_any="altivec neon sse"
2046
2047 # system capabilities
2048
2049 symver_if_any="symver_asm_label symver_gnu_asm"
2050
2051 # threading support
2052 atomics_gcc_if_any="sync_val_compare_and_swap atomic_compare_exchange"
2053 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2054 atomics_win32_if="MemoryBarrier"
2055 atomics_native_if_any="$ATOMICS_LIST"
2056 w32threads_deps="atomics_native"
2057 threads_if_any="$THREADS_LIST"
2058
2059 # subsystems
2060 dct_select="rdft"
2061 error_resilience_select="me_cmp"
2062 faandct_deps="faan fdctdsp"
2063 faanidct_deps="faan idctdsp"
2064 frame_thread_encoder_deps="encoders threads"
2065 intrax8_select="error_resilience"
2066 mdct_select="fft"
2067 rdft_select="fft"
2068 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2069 mpeg_er_select="error_resilience"
2070 mpegaudio_select="mpegaudiodsp"
2071 mpegaudiodsp_select="dct"
2072 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp videodsp"
2073 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2074
2075 # decoders / encoders
2076 aac_decoder_select="imdct15 mdct sinewin"
2077 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
2078 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2079 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
2080 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2081 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2082 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2083 aic_decoder_select="golomb idctdsp"
2084 alac_encoder_select="lpc"
2085 als_decoder_select="bswapdsp"
2086 amrnb_decoder_select="lsp"
2087 amrwb_decoder_select="lsp"
2088 amv_decoder_select="sp5x_decoder exif"
2089 amv_encoder_select="aandcttables mpegvideoenc"
2090 ape_decoder_select="bswapdsp llauddsp"
2091 apng_decoder_select="zlib"
2092 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2093 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2094 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2095 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2096 atrac1_decoder_select="mdct sinewin"
2097 atrac3_decoder_select="mdct"
2098 atrac3p_decoder_select="mdct sinewin"
2099 avrn_decoder_select="exif"
2100 bink_decoder_select="blockdsp hpeldsp"
2101 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2102 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2103 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2104 cllc_decoder_select="bswapdsp"
2105 comfortnoise_encoder_select="lpc"
2106 cook_decoder_select="audiodsp mdct sinewin"
2107 cscd_decoder_select="lzo"
2108 cscd_decoder_suggest="zlib"
2109 dca_decoder_select="fmtconvert mdct"
2110 dirac_decoder_select="dwt golomb videodsp mpegvideoenc"
2111 dnxhd_decoder_select="blockdsp idctdsp"
2112 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2113 dvvideo_decoder_select="dvprofile idctdsp"
2114 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2115 dxa_decoder_select="zlib"
2116 eac3_decoder_select="ac3_decoder"
2117 eac3_encoder_select="ac3_encoder"
2118 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2119 eatgq_decoder_select="aandcttables"
2120 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
2121 exr_decoder_select="zlib"
2122 ffv1_decoder_select="golomb rangecoder"
2123 ffv1_encoder_select="rangecoder"
2124 ffvhuff_decoder_select="huffyuv_decoder"
2125 ffvhuff_encoder_select="huffyuv_encoder"
2126 fic_decoder_select="golomb"
2127 flac_decoder_select="golomb"
2128 flac_encoder_select="bswapdsp golomb lpc"
2129 flashsv_decoder_select="zlib"
2130 flashsv_encoder_select="zlib"
2131 flashsv2_encoder_select="zlib"
2132 flashsv2_decoder_select="zlib"
2133 flv_decoder_select="h263_decoder"
2134 flv_encoder_select="h263_encoder"
2135 fourxm_decoder_select="blockdsp bswapdsp"
2136 fraps_decoder_select="bswapdsp huffman"
2137 g2m_decoder_select="blockdsp idctdsp zlib"
2138 g729_decoder_select="audiodsp"
2139 h261_decoder_select="mpeg_er mpegvideo"
2140 h261_encoder_select="aandcttables mpegvideoenc"
2141 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2142 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2143 h263i_decoder_select="h263_decoder"
2144 h263p_encoder_select="h263_encoder"
2145 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
2146 h264_decoder_suggest="error_resilience"
2147 h264_qsv_decoder_deps="libmfx"
2148 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsv h264_qsv_hwaccel"
2149 hevc_decoder_select="bswapdsp cabac golomb videodsp"
2150 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2151 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llviddsp"
2152 iac_decoder_select="imc_decoder"
2153 imc_decoder_select="bswapdsp fft mdct sinewin"
2154 indeo3_decoder_select="hpeldsp"
2155 interplay_video_decoder_select="hpeldsp"
2156 jpegls_decoder_select="golomb mjpeg_decoder"
2157 jpegls_encoder_select="golomb"
2158 jv_decoder_select="blockdsp"
2159 lagarith_decoder_select="huffyuvdsp"
2160 ljpeg_encoder_select="aandcttables idctdsp"
2161 loco_decoder_select="golomb"
2162 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2163 metasound_decoder_select="lsp mdct sinewin"
2164 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2165 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp"
2166 mjpeg_encoder_select="aandcttables mpegvideoenc"
2167 mjpegb_decoder_select="mjpeg_decoder"
2168 mlp_decoder_select="mlp_parser"
2169 motionpixels_decoder_select="bswapdsp"
2170 mp1_decoder_select="mpegaudio"
2171 mp1float_decoder_select="mpegaudio"
2172 mp2_decoder_select="mpegaudio"
2173 mp2float_decoder_select="mpegaudio"
2174 mp3_decoder_select="mpegaudio"
2175 mp3adu_decoder_select="mpegaudio"
2176 mp3adufloat_decoder_select="mpegaudio"
2177 mp3float_decoder_select="mpegaudio"
2178 mp3on4_decoder_select="mpegaudio"
2179 mp3on4float_decoder_select="mpegaudio"
2180 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2181 mpc8_decoder_select="mpegaudiodsp"
2182 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2183 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2184 mpegvideo_decoder_select="error_resilience mpeg_er mpegvideo"
2185 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2186 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2187 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2188 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2189 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2190 mpeg4_encoder_select="h263_encoder"
2191 msmpeg4v1_decoder_select="h263_decoder"
2192 msmpeg4v2_decoder_select="h263_decoder"
2193 msmpeg4v2_encoder_select="h263_encoder"
2194 msmpeg4v3_decoder_select="h263_decoder"
2195 msmpeg4v3_encoder_select="h263_encoder"
2196 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2197 mxpeg_decoder_select="mjpeg_decoder"
2198 nellymoser_decoder_select="mdct sinewin"
2199 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2200 nuv_decoder_select="idctdsp lzo"
2201 on2avc_decoder_select="mdct"
2202 opus_decoder_deps="swresample"
2203 opus_decoder_select="imdct15"
2204 png_decoder_select="zlib"
2205 png_encoder_select="huffyuvencdsp zlib"
2206 prores_decoder_select="blockdsp idctdsp"
2207 prores_encoder_select="fdctdsp"
2208 qcelp_decoder_select="lsp"
2209 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2210 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2211 ra_144_decoder_select="audiodsp"
2212 ralf_decoder_select="golomb"
2213 rawvideo_decoder_select="bswapdsp"
2214 rtjpeg_decoder_select="me_cmp"
2215 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2216 rv10_encoder_select="h263_encoder"
2217 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2218 rv20_encoder_select="h263_encoder"
2219 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo videodsp"
2220 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo videodsp"
2221 shorten_decoder_select="golomb"
2222 sipr_decoder_select="lsp"
2223 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2224 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2225 sonic_decoder_select="golomb rangecoder"
2226 sonic_encoder_select="golomb rangecoder"
2227 sonic_ls_encoder_select="golomb rangecoder"
2228 sp5x_decoder_select="mjpeg_decoder"
2229 svq1_decoder_select="hpeldsp"
2230 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2231 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2232 svq3_decoder_suggest="zlib"
2233 tak_decoder_select="audiodsp"
2234 theora_decoder_select="vp3_decoder"
2235 thp_decoder_select="mjpeg_decoder"
2236 tiff_decoder_suggest="zlib lzma"
2237 tiff_encoder_suggest="zlib"
2238 truehd_decoder_select="mlp_parser"
2239 truemotion2_decoder_select="bswapdsp"
2240 truespeech_decoder_select="bswapdsp"
2241 tscc_decoder_select="zlib"
2242 twinvq_decoder_select="mdct lsp sinewin"
2243 utvideo_decoder_select="bswapdsp"
2244 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2245 vble_decoder_select="huffyuvdsp"
2246 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2247 vc1image_decoder_select="vc1_decoder"
2248 vorbis_decoder_select="mdct"
2249 vorbis_encoder_select="mdct"
2250 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2251 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
2252 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
2253 vp6a_decoder_select="vp6_decoder"
2254 vp6f_decoder_select="vp6_decoder"
2255 vp7_decoder_select="h264pred videodsp"
2256 vp8_decoder_select="h264pred videodsp"
2257 vp9_decoder_select="videodsp vp9_parser"
2258 webp_decoder_select="vp8_decoder"
2259 wmalossless_decoder_select="llauddsp"
2260 wmapro_decoder_select="mdct sinewin wma_freqs"
2261 wmav1_decoder_select="mdct sinewin wma_freqs"
2262 wmav1_encoder_select="mdct sinewin wma_freqs"
2263 wmav2_decoder_select="mdct sinewin wma_freqs"
2264 wmav2_encoder_select="mdct sinewin wma_freqs"
2265 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2266 wmv1_decoder_select="h263_decoder"
2267 wmv1_encoder_select="h263_encoder"
2268 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp"
2269 wmv2_encoder_select="h263_encoder"
2270 wmv3_decoder_select="vc1_decoder"
2271 wmv3image_decoder_select="wmv3_decoder"
2272 zerocodec_decoder_select="zlib"
2273 zlib_decoder_select="zlib"
2274 zlib_encoder_select="zlib"
2275 zmbv_decoder_select="zlib"
2276 zmbv_encoder_select="zlib"
2277
2278 # hardware accelerators
2279 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2280 dxva2_deps="dxva2api_h"
2281 vaapi_deps="va_va_h"
2282 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2283 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2284 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2285 xvmc_deps="X11_extensions_XvMClib_h"
2286
2287 h263_vaapi_hwaccel_deps="vaapi"
2288 h263_vaapi_hwaccel_select="h263_decoder"
2289 h263_vdpau_hwaccel_deps="vdpau"
2290 h263_vdpau_hwaccel_select="h263_decoder"
2291 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2292 h264_dxva2_hwaccel_deps="dxva2"
2293 h264_dxva2_hwaccel_select="h264_decoder"
2294 h264_qsv_hwaccel_deps="libmfx"
2295 h264_vaapi_hwaccel_deps="vaapi"
2296 h264_vaapi_hwaccel_select="h264_decoder"
2297 h264_vda_decoder_deps="vda"
2298 h264_vda_decoder_select="h264_decoder"
2299 h264_vda_hwaccel_deps="vda"
2300 h264_vda_hwaccel_select="h264_decoder"
2301 h264_vda_old_hwaccel_deps="vda"
2302 h264_vda_old_hwaccel_select="h264_decoder"
2303 h264_vdpau_decoder_deps="vdpau"
2304 h264_vdpau_decoder_select="h264_decoder"
2305 h264_vdpau_hwaccel_deps="vdpau"
2306 h264_vdpau_hwaccel_select="h264_decoder"
2307 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2308 hevc_dxva2_hwaccel_select="hevc_decoder"
2309 mpeg_vdpau_decoder_deps="vdpau"
2310 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2311 mpeg_xvmc_hwaccel_deps="xvmc"
2312 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2313 mpeg1_vdpau_decoder_deps="vdpau"
2314 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2315 mpeg1_vdpau_hwaccel_deps="vdpau"
2316 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2317 mpeg1_xvmc_hwaccel_deps="xvmc"
2318 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2319 mpeg2_crystalhd_decoder_select="crystalhd"
2320 mpeg2_dxva2_hwaccel_deps="dxva2"
2321 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2322 mpeg2_vaapi_hwaccel_deps="vaapi"
2323 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2324 mpeg2_vdpau_hwaccel_deps="vdpau"
2325 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2326 mpeg2_xvmc_hwaccel_deps="xvmc"
2327 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2328 mpeg4_crystalhd_decoder_select="crystalhd"
2329 mpeg4_vaapi_hwaccel_deps="vaapi"
2330 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2331 mpeg4_vdpau_decoder_deps="vdpau"
2332 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2333 mpeg4_vdpau_hwaccel_deps="vdpau"
2334 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2335 msmpeg4_crystalhd_decoder_select="crystalhd"
2336 vc1_crystalhd_decoder_select="crystalhd"
2337 vc1_dxva2_hwaccel_deps="dxva2"
2338 vc1_dxva2_hwaccel_select="vc1_decoder"
2339 vc1_vaapi_hwaccel_deps="vaapi"
2340 vc1_vaapi_hwaccel_select="vc1_decoder"
2341 vc1_vdpau_decoder_deps="vdpau"
2342 vc1_vdpau_decoder_select="vc1_decoder"
2343 vc1_vdpau_hwaccel_deps="vdpau"
2344 vc1_vdpau_hwaccel_select="vc1_decoder"
2345 wmv3_crystalhd_decoder_select="crystalhd"
2346 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2347 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2348 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2349 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2350
2351 # parsers
2352 h264_parser_select="h264_decoder"
2353 hevc_parser_select="hevc_decoder"
2354 mpegvideo_parser_select="mpegvideo"
2355 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2356 vc1_parser_select="mpegvideo startcode vc1_decoder"
2357
2358 # external libraries
2359 libaacplus_encoder_deps="libaacplus"
2360 libcelt_decoder_deps="libcelt"
2361 libfaac_encoder_deps="libfaac"
2362 libfaac_encoder_select="audio_frame_queue"
2363 libfdk_aac_decoder_deps="libfdk_aac"
2364 libfdk_aac_encoder_deps="libfdk_aac"
2365 libfdk_aac_encoder_select="audio_frame_queue"
2366 libgme_demuxer_deps="libgme"
2367 libgsm_decoder_deps="libgsm"
2368 libgsm_encoder_deps="libgsm"
2369 libgsm_ms_decoder_deps="libgsm"
2370 libgsm_ms_encoder_deps="libgsm"
2371 libilbc_decoder_deps="libilbc"
2372 libilbc_encoder_deps="libilbc"
2373 libmodplug_demuxer_deps="libmodplug"
2374 libmp3lame_encoder_deps="libmp3lame"
2375 libmp3lame_encoder_select="audio_frame_queue"
2376 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2377 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2378 libopencore_amrnb_encoder_select="audio_frame_queue"
2379 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2380 libopenh264_encoder_deps="libopenh264"
2381 libopenjpeg_decoder_deps="libopenjpeg"
2382 libopenjpeg_encoder_deps="libopenjpeg"
2383 libopus_decoder_deps="libopus"
2384 libopus_encoder_deps="libopus"
2385 libopus_encoder_select="audio_frame_queue"
2386 libquvi_demuxer_deps="libquvi"
2387 libschroedinger_decoder_deps="libschroedinger"
2388 libschroedinger_encoder_deps="libschroedinger"
2389 libshine_encoder_deps="libshine"
2390 libshine_encoder_select="audio_frame_queue"
2391 libspeex_decoder_deps="libspeex"
2392 libspeex_encoder_deps="libspeex"
2393 libspeex_encoder_select="audio_frame_queue"
2394 libstagefright_h264_decoder_deps="libstagefright_h264"
2395 libtheora_encoder_deps="libtheora"
2396 libtwolame_encoder_deps="libtwolame"
2397 libvo_aacenc_encoder_deps="libvo_aacenc"
2398 libvo_aacenc_encoder_select="audio_frame_queue"
2399 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2400 libvorbis_decoder_deps="libvorbis"
2401 libvorbis_encoder_deps="libvorbis"
2402 libvorbis_encoder_select="audio_frame_queue"
2403 libvpx_vp8_decoder_deps="libvpx"
2404 libvpx_vp8_encoder_deps="libvpx"
2405 libvpx_vp9_decoder_deps="libvpx"
2406 libvpx_vp9_encoder_deps="libvpx"
2407 libwavpack_encoder_deps="libwavpack"
2408 libwebp_encoder_deps="libwebp"
2409 libx264_encoder_deps="libx264"
2410 libx264rgb_encoder_deps="libx264"
2411 libx264rgb_encoder_select="libx264_encoder"
2412 libx265_encoder_deps="libx265"
2413 libxavs_encoder_deps="libxavs"
2414 libxvid_encoder_deps="libxvid"
2415 libutvideo_decoder_deps="libutvideo"
2416 libutvideo_encoder_deps="libutvideo"
2417 libzvbi_teletext_decoder_deps="libzvbi"
2418 nvenc_encoder_deps="nvenc"
2419
2420 # demuxers / muxers
2421 ac3_demuxer_select="ac3_parser"
2422 asf_demuxer_select="riffdec"
2423 asf_muxer_select="riffenc"
2424 asf_stream_muxer_select="asf_muxer"
2425 avi_demuxer_select="riffdec exif"
2426 avi_muxer_select="riffenc"
2427 avisynth_demuxer_deps="avisynth"
2428 avisynth_demuxer_select="riffdec"
2429 caf_demuxer_select="riffdec"
2430 dash_muxer_select="mp4_muxer"
2431 dirac_demuxer_select="dirac_parser"
2432 dts_demuxer_select="dca_parser"
2433 dtshd_demuxer_select="dca_parser"
2434 dv_demuxer_select="dvprofile"
2435 dv_muxer_select="dvprofile"
2436 dxa_demuxer_select="riffdec"
2437 eac3_demuxer_select="ac3_parser"
2438 f4v_muxer_select="mov_muxer"
2439 flac_demuxer_select="flac_parser"
2440 hds_muxer_select="flv_muxer"
2441 hls_muxer_select="mpegts_muxer"
2442 image2_alias_pix_demuxer_select="image2_demuxer"
2443 image2_brender_pix_demuxer_select="image2_demuxer"
2444 ipod_muxer_select="mov_muxer"
2445 ismv_muxer_select="mov_muxer"
2446 libnut_demuxer_deps="libnut"
2447 libnut_muxer_deps="libnut"
2448 matroska_audio_muxer_select="matroska_muxer"
2449 matroska_demuxer_select="riffdec"
2450 matroska_demuxer_suggest="bzlib lzo zlib"
2451 matroska_muxer_select="riffenc"
2452 mmf_muxer_select="riffenc"
2453 mov_demuxer_select="riffdec"
2454 mov_demuxer_suggest="zlib"
2455 mov_muxer_select="riffenc rtpenc_chain"
2456 mp3_demuxer_select="mpegaudio_parser"
2457 mp4_muxer_select="mov_muxer"
2458 mpegts_muxer_select="adts_muxer latm_muxer"
2459 mpegtsraw_demuxer_select="mpegts_demuxer"
2460 mxf_d10_muxer_select="mxf_muxer"
2461 mxf_opatom_muxer_select="mxf_muxer"
2462 nut_muxer_select="riffenc"
2463 nuv_demuxer_select="riffdec"
2464 oga_muxer_select="ogg_muxer"
2465 ogg_demuxer_select="golomb"
2466 opus_muxer_select="ogg_muxer"
2467 psp_muxer_select="mov_muxer"
2468 rtp_demuxer_select="sdp_demuxer"
2469 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2470 rtsp_demuxer_select="http_protocol rtpdec"
2471 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2472 sap_demuxer_select="sdp_demuxer"
2473 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2474 sdp_demuxer_select="rtpdec"
2475 smoothstreaming_muxer_select="ismv_muxer"
2476 spdif_muxer_select="aac_parser"
2477 spx_muxer_select="ogg_muxer"
2478 tak_demuxer_select="tak_parser"
2479 tg2_muxer_select="mov_muxer"
2480 tgp_muxer_select="mov_muxer"
2481 vobsub_demuxer_select="mpegps_demuxer"
2482 w64_demuxer_select="wav_demuxer"
2483 w64_muxer_select="wav_muxer"
2484 wav_demuxer_select="riffdec"
2485 wav_muxer_select="riffenc"
2486 webm_muxer_select="riffenc"
2487 wtv_demuxer_select="riffdec"
2488 wtv_muxer_select="riffenc"
2489 xmv_demuxer_select="riffdec"
2490 xwma_demuxer_select="riffdec"
2491
2492 # indevs / outdevs
2493 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2494 alsa_outdev_deps="alsa_asoundlib_h"
2495 avfoundation_indev_extralibs="-framework CoreVideo -framework Foundation -framework AVFoundation -framework CoreMedia"
2496 avfoundation_indev_select="avfoundation"
2497 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2498 caca_outdev_deps="libcaca"
2499 decklink_outdev_deps="decklink pthreads"
2500 decklink_outdev_extralibs="-lstdc++"
2501 decklink_indev_deps="decklink pthreads"
2502 decklink_indev_extralibs="-lstdc++"
2503 dshow_indev_deps="IBaseFilter"
2504 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32"
2505 dv1394_indev_deps="dv1394"
2506 dv1394_indev_select="dv_demuxer"
2507 fbdev_indev_deps="linux_fb_h"
2508 fbdev_outdev_deps="linux_fb_h"
2509 gdigrab_indev_deps="CreateDIBSection"
2510 gdigrab_indev_extralibs="-lgdi32"
2511 gdigrab_indev_select="bmp_decoder"
2512 iec61883_indev_deps="libiec61883"
2513 jack_indev_deps="jack_jack_h sem_timedwait"
2514 lavfi_indev_deps="avfilter"
2515 libcdio_indev_deps="libcdio"
2516 libdc1394_indev_deps="libdc1394"
2517 libv4l2_indev_deps="libv4l2"
2518 openal_indev_deps="openal"
2519 opengl_outdev_deps="opengl"
2520 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2521 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2522 pulse_indev_deps="libpulse"
2523 pulse_outdev_deps="libpulse"
2524 qtkit_indev_extralibs="-framework QTKit -framework Foundation -framework QuartzCore"
2525 qtkit_indev_select="qtkit"
2526 sdl_outdev_deps="sdl"
2527 sndio_indev_deps="sndio_h"
2528 sndio_outdev_deps="sndio_h"
2529 v4l_indev_deps="linux_videodev_h"
2530 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2531 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2532 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2533 vfwcap_indev_extralibs="-lavicap32"
2534 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2535 xv_outdev_extralibs="-lXv -lX11 -lXext"
2536 x11grab_indev_deps="x11grab"
2537 x11grab_xcb_indev_deps="libxcb"
2538
2539 # protocols
2540 bluray_protocol_deps="libbluray"
2541 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2542 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2543 ffrtmpcrypt_protocol_select="tcp_protocol"
2544 ffrtmphttp_protocol_deps="!librtmp_protocol"
2545 ffrtmphttp_protocol_select="http_protocol"
2546 ftp_protocol_select="tcp_protocol"
2547 gopher_protocol_select="network"
2548 http_protocol_select="tcp_protocol"
2549 httpproxy_protocol_select="tcp_protocol"
2550 https_protocol_select="tls_protocol"
2551 icecast_protocol_select="http_protocol"
2552 librtmp_protocol_deps="librtmp"
2553 librtmpe_protocol_deps="librtmp"
2554 librtmps_protocol_deps="librtmp"
2555 librtmpt_protocol_deps="librtmp"
2556 librtmpte_protocol_deps="librtmp"
2557 libsmbclient_protocol_deps="libsmbclient gplv3"
2558 libssh_protocol_deps="libssh"
2559 mmsh_protocol_select="http_protocol"
2560 mmst_protocol_select="network"
2561 rtmp_protocol_deps="!librtmp_protocol"
2562 rtmp_protocol_select="tcp_protocol"
2563 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2564 rtmps_protocol_deps="!librtmp_protocol"
2565 rtmps_protocol_select="tls_protocol"
2566 rtmpt_protocol_select="ffrtmphttp_protocol"
2567 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2568 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2569 rtp_protocol_select="udp_protocol"
2570 sctp_protocol_deps="struct_sctp_event_subscribe"
2571 sctp_protocol_select="network"
2572 srtp_protocol_select="rtp_protocol"
2573 tcp_protocol_select="network"
2574 tls_protocol_deps_any="openssl gnutls"
2575 tls_protocol_select="tcp_protocol"
2576 udp_protocol_select="network"
2577 udplite_protocol_select="network"
2578 unix_protocol_deps="sys_un_h"
2579 unix_protocol_select="network"
2580
2581 # filters
2582 amovie_filter_deps="avcodec avformat"
2583 aresample_filter_deps="swresample"
2584 ass_filter_deps="libass"
2585 asyncts_filter_deps="avresample"
2586 atempo_filter_deps="avcodec"
2587 atempo_filter_select="rdft"
2588 azmq_filter_deps="libzmq"
2589 blackframe_filter_deps="gpl"
2590 boxblur_filter_deps="gpl"
2591 bs2b_filter_deps="libbs2b"
2592 colormatrix_filter_deps="gpl"
2593 cropdetect_filter_deps="gpl"
2594 delogo_filter_deps="gpl"
2595 deshake_filter_select="pixelutils"
2596 drawtext_filter_deps="libfreetype"
2597 ebur128_filter_deps="gpl"
2598 eq_filter_deps="gpl"
2599 fftfilt_filter_deps="avcodec"
2600 fftfilt_filter_select="rdft"
2601 flite_filter_deps="libflite"
2602 frei0r_filter_deps="frei0r dlopen"
2603 frei0r_src_filter_deps="frei0r dlopen"
2604 fspp_filter_deps="gpl"
2605 geq_filter_deps="gpl"
2606 histeq_filter_deps="gpl"
2607 hqdn3d_filter_deps="gpl"
2608 interlace_filter_deps="gpl"
2609 kerndeint_filter_deps="gpl"
2610 ladspa_filter_deps="ladspa dlopen"
2611 mcdeint_filter_deps="avcodec gpl"
2612 movie_filter_deps="avcodec avformat"
2613 mpdecimate_filter_deps="gpl"
2614 mpdecimate_filter_select="pixelutils"
2615 mptestsrc_filter_deps="gpl"
2616 negate_filter_deps="lut_filter"
2617 perspective_filter_deps="gpl"
2618 pp7_filter_deps="gpl"
2619 ocv_filter_deps="libopencv"
2620 owdenoise_filter_deps="gpl"
2621 pan_filter_deps="swresample"
2622 phase_filter_deps="gpl"
2623 pp_filter_deps="gpl postproc"
2624 pullup_filter_deps="gpl"
2625 removelogo_filter_deps="avcodec avformat swscale"
2626 repeatfields_filter_deps="gpl"
2627 resample_filter_deps="avresample"
2628 sab_filter_deps="gpl swscale"
2629 scale_filter_deps="swscale"
2630 select_filter_select="pixelutils"
2631 smartblur_filter_deps="gpl swscale"
2632 showspectrum_filter_deps="avcodec"
2633 showspectrum_filter_select="rdft"
2634 spp_filter_deps="gpl avcodec"
2635 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
2636 stereo3d_filter_deps="gpl"
2637 subtitles_filter_deps="avformat avcodec libass"
2638 super2xsai_filter_deps="gpl"
2639 tinterlace_filter_deps="gpl"
2640 vidstabdetect_filter_deps="libvidstab"
2641 vidstabtransform_filter_deps="libvidstab"
2642 pixfmts_super2xsai_test_deps="super2xsai_filter"
2643 tinterlace_merge_test_deps="tinterlace_filter"
2644 tinterlace_pad_test_deps="tinterlace_filter"
2645 uspp_filter_deps="gpl avcodec"
2646 zmq_filter_deps="libzmq"
2647 zoompan_filter_deps="swscale"
2648
2649 # examples
2650 avio_reading="avformat avcodec avutil"
2651 avcodec_example_deps="avcodec avutil"
2652 decoding_encoding_example_deps="avcodec avformat avutil"
2653 demuxing_decoding_example_deps="avcodec avformat avutil"
2654 extract_mvs_example_deps="avcodec avformat avutil"
2655 filter_audio_example_deps="avfilter avutil"
2656 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2657 filtering_video_example_deps="avfilter avcodec avformat avutil"
2658 metadata_example_deps="avformat avutil"
2659 muxing_example_deps="avcodec avformat avutil swscale"
2660 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2661 remuxing_example_deps="avcodec avformat avutil"
2662 resampling_audio_example_deps="avutil swresample"
2663 scaling_video_example_deps="avutil swscale"
2664 transcode_aac_example_deps="avcodec avformat swresample"
2665 transcoding_example_deps="avfilter avcodec avformat avutil"
2666
2667 # libraries, in linking order
2668 avcodec_deps="avutil"
2669 avdevice_deps="avformat avcodec avutil"
2670 avfilter_deps="avutil"
2671 avformat_deps="avcodec avutil"
2672 avresample_deps="avutil"
2673 postproc_deps="avutil gpl"
2674 swresample_deps="avutil"
2675 swscale_deps="avutil"
2676
2677 # programs
2678 ffmpeg_deps="avcodec avfilter avformat swresample"
2679 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2680                null_filter
2681                setpts_filter trim_filter"
2682 ffplay_deps="avcodec avformat swscale swresample sdl"
2683 ffplay_libs='$sdl_libs'
2684 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
2685 ffprobe_deps="avcodec avformat"
2686 ffserver_deps="avformat fork sarestart"
2687 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2688
2689 # documentation
2690 podpages_deps="perl"
2691 manpages_deps="perl pod2man"
2692 htmlpages_deps="perl"
2693 htmlpages_deps_any="makeinfo_html texi2html"
2694 txtpages_deps="perl makeinfo"
2695 doc_deps_any="manpages htmlpages podpages txtpages"
2696
2697 # default parameters
2698
2699 logfile="config.log"
2700
2701 # installation paths
2702 prefix_default="/usr/local"
2703 bindir_default='${prefix}/bin'
2704 datadir_default='${prefix}/share/ffmpeg'
2705 docdir_default='${prefix}/share/doc/ffmpeg'
2706 incdir_default='${prefix}/include'
2707 libdir_default='${prefix}/lib'
2708 mandir_default='${prefix}/share/man'
2709
2710 # toolchain
2711 ar_default="ar"
2712 cc_default="gcc"
2713 cxx_default="g++"
2714 host_cc_default="gcc"
2715 cp_f="cp -f"
2716 doxygen_default="doxygen"
2717 install="install"
2718 ln_s="ln -s -f"
2719 nm_default="nm -g"
2720 objformat="elf"
2721 pkg_config_default=pkg-config
2722 if ranlib 2>&1 | grep -q "\-D "; then
2723     ranlib_default="ranlib -D"
2724 else
2725     ranlib_default="ranlib"
2726 fi
2727 strip_default="strip"
2728 yasmexe_default="yasm"
2729 windres_default="windres"
2730
2731 # OS
2732 target_os_default=$(tolower $(uname -s))
2733 host_os=$target_os_default
2734
2735 # machine
2736 if test "$target_os_default" = aix; then
2737     arch_default=$(uname -p)
2738     strip_default="strip -X32_64"
2739 else
2740     arch_default=$(uname -m)
2741 fi
2742 cpu="generic"
2743 intrinsics="none"
2744
2745 # configurable options
2746 enable $PROGRAM_LIST
2747 enable $DOCUMENT_LIST
2748 enable $EXAMPLE_LIST
2749 enable $(filter_out avresample $LIBRARY_LIST)
2750 enable stripping
2751
2752 enable asm
2753 enable debug
2754 enable doc
2755 enable faan faandct faanidct
2756 enable optimizations
2757 enable runtime_cpudetect
2758 enable safe_bitstream_reader
2759 enable static
2760 enable swscale_alpha
2761
2762 sws_max_filter_size_default=256
2763 set_default sws_max_filter_size
2764
2765 # Enable hwaccels by default.
2766 enable dxva2 vaapi vda vdpau xvmc
2767 enable xlib
2768
2769 # build settings
2770 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2771 LIBPREF="lib"
2772 LIBSUF=".a"
2773 FULLNAME='$(NAME)$(BUILDSUF)'
2774 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2775 SLIBPREF="lib"
2776 SLIBSUF=".so"
2777 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2778 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2779 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2780 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2781 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2782 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2783
2784 asflags_filter=echo
2785 cflags_filter=echo
2786 ldflags_filter=echo
2787
2788 AS_C='-c'
2789 AS_O='-o $@'
2790 CC_C='-c'
2791 CC_E='-E -o $@'
2792 CC_O='-o $@'
2793 CXX_C='-c'
2794 CXX_O='-o $@'
2795 LD_O='-o $@'
2796 LD_LIB='-l%'
2797 LD_PATH='-L'
2798 HOSTCC_C='-c'
2799 HOSTCC_E='-E -o $@'
2800 HOSTCC_O='-o $@'
2801 HOSTLD_O='-o $@'
2802
2803 host_libs='-lm'
2804 host_cflags_filter=echo
2805 host_ldflags_filter=echo
2806
2807 target_path='$(CURDIR)'
2808
2809 # since the object filename is not given with the -MM flag, the compiler
2810 # is only able to print the basename, and we must add the path ourselves
2811 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2812 DEPFLAGS='-MM'
2813
2814 # find source path
2815 if test -f configure; then
2816     source_path=.
2817 else
2818     source_path=$(cd $(dirname "$0"); pwd)
2819     echo "$source_path" | grep -q '[[:blank:]]' &&
2820         die "Out of tree builds are impossible with whitespace in source path."
2821     test -e "$source_path/config.h" &&
2822         die "Out of tree builds are impossible with config.h in source dir."
2823 fi
2824
2825 for v in "$@"; do
2826     r=${v#*=}
2827     l=${v%"$r"}
2828     r=$(sh_quote "$r")
2829     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2830 done
2831
2832 find_things(){
2833     thing=$1
2834     pattern=$2
2835     file=$source_path/$3
2836     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2837 }
2838
2839 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2840 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2841 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2842 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2843 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2844 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2845 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2846 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2847 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2848 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2849 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2850
2851 ALL_COMPONENTS="
2852     $BSF_LIST
2853     $DECODER_LIST
2854     $DEMUXER_LIST
2855     $ENCODER_LIST
2856     $FILTER_LIST
2857     $HWACCEL_LIST
2858     $INDEV_LIST
2859     $MUXER_LIST
2860     $OUTDEV_LIST
2861     $PARSER_LIST
2862     $PROTOCOL_LIST
2863 "
2864
2865 for n in $COMPONENT_LIST; do
2866     v=$(toupper ${n%s})_LIST
2867     eval enable \$$v
2868     eval ${n}_if_any="\$$v"
2869 done
2870
2871 enable $ARCH_EXT_LIST
2872
2873 die_unknown(){
2874     echo "Unknown option \"$1\"."
2875     echo "See $0 --help for available options."
2876     exit 1
2877 }
2878
2879 print_3_columns() {
2880     cat | tr ' ' '\n' | sort | pr -r -3 -t
2881 }
2882
2883 show_list() {
2884     suffix=_$1
2885     shift
2886     echo $* | sed s/$suffix//g | print_3_columns
2887     exit 0
2888 }
2889
2890 rand_list(){
2891     IFS=', '
2892     set -- $*
2893     unset IFS
2894     for thing; do
2895         comp=${thing%:*}
2896         prob=${thing#$comp}
2897         prob=${prob#:}
2898         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2899         echo "prob ${prob:-0.5}"
2900         printf '%s\n' $comp
2901     done
2902 }
2903
2904 do_random(){
2905     action=$1
2906     shift
2907     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2908     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2909 }
2910
2911 for opt do
2912     optval="${opt#*=}"
2913     case "$opt" in
2914         --extra-ldflags=*)
2915             add_ldflags $optval
2916         ;;
2917         --extra-ldexeflags=*)
2918             add_ldexeflags $optval
2919         ;;
2920         --extra-libs=*)
2921             add_extralibs $optval
2922         ;;
2923         --disable-devices)
2924             disable $INDEV_LIST $OUTDEV_LIST
2925         ;;
2926         --enable-debug=*)
2927             debuglevel="$optval"
2928         ;;
2929         --disable-programs)
2930             disable $PROGRAM_LIST
2931         ;;
2932         --disable-everything)
2933             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2934         ;;
2935         --disable-all)
2936             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2937             disable $LIBRARY_LIST $PROGRAM_LIST doc
2938         ;;
2939         --enable-random|--disable-random)
2940             action=${opt%%-random}
2941             do_random ${action#--} $COMPONENT_LIST
2942         ;;
2943         --enable-random=*|--disable-random=*)
2944             action=${opt%%-random=*}
2945             do_random ${action#--} $optval
2946         ;;
2947         --enable-*=*|--disable-*=*)
2948             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2949             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2950             eval list=\$$(toupper $thing)_LIST
2951             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2952             list=$(filter "$name" $list)
2953             [ "$list" = "" ] && warn "Option $opt did not match anything"
2954             $action $list
2955         ;;
2956         --enable-?*|--disable-?*)
2957             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2958             if is_in $option $COMPONENT_LIST; then
2959                 test $action = disable && action=unset
2960                 eval $action \$$(toupper ${option%s})_LIST
2961             elif is_in $option $CMDLINE_SELECT; then
2962                 $action $option
2963             else
2964                 die_unknown $opt
2965             fi
2966         ;;
2967         --list-*)
2968             NAME="${opt#--list-}"
2969             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2970             NAME=${NAME%s}
2971             eval show_list $NAME \$$(toupper $NAME)_LIST
2972         ;;
2973         --help|-h) show_help
2974         ;;
2975         --fatal-warnings) enable fatal_warnings
2976         ;;
2977         *)
2978             optname="${opt%%=*}"
2979             optname="${optname#--}"
2980             optname=$(echo "$optname" | sed 's/-/_/g')
2981             if is_in $optname $CMDLINE_SET; then
2982                 eval $optname='$optval'
2983             elif is_in $optname $CMDLINE_APPEND; then
2984                 append $optname "$optval"
2985             else
2986                 die_unknown $opt
2987             fi
2988         ;;
2989     esac
2990 done
2991
2992 disabled logging && logfile=/dev/null
2993
2994 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2995 set >> $logfile
2996
2997 test -n "$cross_prefix" && enable cross_compile
2998
2999 if enabled cross_compile; then
3000     test -n "$arch" && test -n "$target_os" ||
3001         die "Must specify target arch and OS when cross-compiling"
3002 fi
3003
3004 test -n "$valgrind" && toolchain="valgrind-memcheck"
3005
3006 case "$toolchain" in
3007     clang-asan)
3008         cc_default="clang"
3009         add_cflags  -fsanitize=address
3010         add_ldflags -fsanitize=address
3011     ;;
3012     clang-tsan)
3013         cc_default="clang"
3014         add_cflags  -fsanitize=thread -pie
3015         add_ldflags -fsanitize=thread -pie
3016     ;;
3017     clang-usan)
3018         cc_default="clang"
3019         add_cflags  -fsanitize=undefined
3020         add_ldflags -fsanitize=undefined
3021     ;;
3022     gcc-asan)
3023         cc_default="gcc"
3024         add_cflags  -fsanitize=address
3025         add_ldflags -fsanitize=address
3026     ;;
3027     gcc-tsan)
3028         cc_default="gcc"
3029         add_cflags  -fsanitize=thread -pie -fPIC
3030         add_ldflags -fsanitize=thread -pie -fPIC
3031     ;;
3032     gcc-usan)
3033         cc_default="gcc"
3034         add_cflags  -fsanitize=undefined
3035         add_ldflags -fsanitize=undefined
3036     ;;
3037     valgrind-massif)
3038         target_exec_default=${valgrind:-"valgrind"}
3039         target_exec_args="--tool=massif --alloc-fn=av_malloc --alloc-fn=av_mallocz --alloc-fn=av_calloc --alloc-fn=av_fast_padded_malloc --alloc-fn=av_fast_malloc --alloc-fn=av_realloc_f --alloc-fn=av_fast_realloc --alloc-fn=av_realloc"
3040     ;;
3041     valgrind-memcheck)
3042         target_exec_default=${valgrind:-"valgrind"}
3043         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3044     ;;
3045     msvc)
3046         # Check whether the current MSVC version needs the C99 converter.
3047         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3048         # support enough of C99 to build ffmpeg. Default to the new
3049         # behaviour if the regexp was unable to match anything, since this
3050         # successfully parses the version number of existing supported
3051         # versions that require the converter (MSVC 2010 and 2012).
3052         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3053         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3054             cc_default="cl"
3055         else
3056             cc_default="c99wrap cl"
3057         fi
3058         ld_default="link"
3059         nm_default="dumpbin -symbols"
3060         ar_default="lib"
3061         target_os_default="win32"
3062         # Use a relative path for TMPDIR. This makes sure all the
3063         # ffconf temp files are written with a relative path, avoiding
3064         # issues with msys/win32 path conversion for MSVC parameters
3065         # such as -Fo<file> or -out:<file>.
3066         TMPDIR=.
3067     ;;
3068     icl)
3069         cc_default="icl"
3070         ld_default="xilink"
3071         nm_default="dumpbin -symbols"
3072         ar_default="xilib"
3073         target_os_default="win32"
3074         TMPDIR=.
3075     ;;
3076     gcov)
3077         add_cflags  -fprofile-arcs -ftest-coverage
3078         add_ldflags -fprofile-arcs -ftest-coverage
3079     ;;
3080     hardened)
3081         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3082         add_cflags   -fno-strict-overflow -fstack-protector-all
3083         add_ldflags  -Wl,-z,relro -Wl,-z,now
3084     ;;
3085     ?*)
3086         die "Unknown toolchain $toolchain"
3087     ;;
3088 esac
3089
3090 ar_default="${cross_prefix}${ar_default}"
3091 cc_default="${cross_prefix}${cc_default}"
3092 cxx_default="${cross_prefix}${cxx_default}"
3093 nm_default="${cross_prefix}${nm_default}"
3094 pkg_config_default="${cross_prefix}${pkg_config_default}"
3095 ranlib_default="${cross_prefix}${ranlib_default}"
3096 strip_default="${cross_prefix}${strip_default}"
3097 windres_default="${cross_prefix}${windres_default}"
3098
3099 sysinclude_default="${sysroot}/usr/include"
3100
3101 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3102     target_exec target_os yasmexe
3103 enabled cross_compile || host_cc_default=$cc
3104 set_default host_cc
3105
3106 pkg_config_fail_message=""
3107 if ! $pkg_config --version >/dev/null 2>&1; then
3108     warn "$pkg_config not found, library detection may fail."
3109     pkg_config=false
3110 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3111     pkg_config_fail_message="
3112 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3113 fi
3114
3115 if test $doxygen != $doxygen_default && \
3116   ! $doxygen --version >/dev/null 2>&1; then
3117     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3118 fi
3119
3120 exesuf() {
3121     case $1 in
3122         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3123     esac
3124 }
3125
3126 EXESUF=$(exesuf $target_os)
3127 HOSTEXESUF=$(exesuf $host_os)
3128
3129 # set temporary file name
3130 : ${TMPDIR:=$TEMPDIR}
3131 : ${TMPDIR:=$TMP}
3132 : ${TMPDIR:=/tmp}
3133
3134 if [ -n "$tempprefix" ] ; then
3135     mktemp(){
3136         echo $tempprefix.${HOSTNAME}.${UID}
3137     }
3138 elif ! check_cmd mktemp -u XXXXXX; then
3139     # simple replacement for missing mktemp
3140     # NOT SAFE FOR GENERAL USE
3141     mktemp(){
3142         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3143     }
3144 fi
3145
3146 tmpfile(){
3147     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
3148         (set -C; exec > $tmp) 2>/dev/null ||
3149         die "Unable to create temporary file in $TMPDIR."
3150     append TMPFILES $tmp
3151     eval $1=$tmp
3152 }
3153
3154 trap 'rm -f -- $TMPFILES' EXIT
3155
3156 tmpfile TMPASM .asm
3157 tmpfile TMPC   .c
3158 tmpfile TMPCPP .cpp
3159 tmpfile TMPE   $EXESUF
3160 tmpfile TMPH   .h
3161 tmpfile TMPM   .m
3162 tmpfile TMPO   .o
3163 tmpfile TMPS   .S
3164 tmpfile TMPSH  .sh
3165 tmpfile TMPV   .ver
3166
3167 unset -f mktemp
3168
3169 chmod +x $TMPE
3170
3171 # make sure we can execute files in $TMPDIR
3172 cat > $TMPSH 2>> $logfile <<EOF
3173 #! /bin/sh
3174 EOF
3175 chmod +x $TMPSH >> $logfile 2>&1
3176 if ! $TMPSH >> $logfile 2>&1; then
3177     cat <<EOF
3178 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3179 variable to another directory and make sure that it is not mounted noexec.
3180 EOF
3181     die "Sanity test failed."
3182 fi
3183
3184 armasm_flags(){
3185     for flag; do
3186         case $flag in
3187             # Filter out MSVC cl.exe options from cflags that shouldn't
3188             # be passed to gas-preprocessor
3189             -M[TD]*)                                            ;;
3190             *)                  echo $flag                      ;;
3191         esac
3192    done
3193 }
3194
3195 ccc_flags(){
3196     for flag; do
3197         case $flag in
3198             -std=c99)           echo -c99                       ;;
3199             -mcpu=*)            echo -arch ${flag#*=}           ;;
3200             -mieee)             echo -ieee                      ;;
3201             -O*|-fast)          echo $flag                      ;;
3202             -fno-math-errno)    echo -assume nomath_errno       ;;
3203             -g)                 echo -g3                        ;;
3204             -Wall)              echo -msg_enable level2         ;;
3205             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3206             -Wl,*)              echo $flag                      ;;
3207             -f*|-W*)                                            ;;
3208             *)                  echo $flag                      ;;
3209         esac
3210    done
3211 }
3212
3213 cparser_flags(){
3214     for flag; do
3215         case $flag in
3216             -Wno-switch)             echo -Wno-switch-enum ;;
3217             -Wno-format-zero-length) ;;
3218             -Wdisabled-optimization) ;;
3219             -Wno-pointer-sign)       echo -Wno-other ;;
3220             *)                       echo $flag ;;
3221         esac
3222     done
3223 }
3224
3225 msvc_common_flags(){
3226     for flag; do
3227         case $flag in
3228             # In addition to specifying certain flags under the compiler
3229             # specific filters, they must be specified here as well or else the
3230             # generic catch all at the bottom will print the original flag.
3231             -Wall)                ;;
3232             -std=c99)             ;;
3233             # Common flags
3234             -fomit-frame-pointer) ;;
3235             -g)                   echo -Z7 ;;
3236             -fno-math-errno)      ;;
3237             -fno-common)          ;;
3238             -fno-signed-zeros)    ;;
3239             -fPIC)                ;;
3240             -mthumb)              ;;
3241             -march=*)             ;;
3242             -lz)                  echo zlib.lib ;;
3243             -lavifil32)           echo vfw32.lib ;;
3244             -lavicap32)           echo vfw32.lib user32.lib ;;
3245             -l*)                  echo ${flag#-l}.lib ;;
3246             -L*)                  echo -libpath:${flag#-L} ;;
3247             *)                    echo $flag ;;
3248         esac
3249     done
3250 }
3251
3252 msvc_flags(){
3253     msvc_common_flags "$@"
3254     for flag; do
3255         case $flag in
3256             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3257                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3258                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3259                                        -wd4554 \
3260                                        -wd4273 -wd4701 ;;
3261         esac
3262     done
3263 }
3264
3265 icl_flags(){
3266     msvc_common_flags "$@"
3267     for flag; do
3268         case $flag in
3269             # Despite what Intel's documentation says -Wall, which is supported
3270             # on Windows, does enable remarks so disable them here.
3271             -Wall)                echo $flag -Qdiag-disable:remark ;;
3272             -std=c99)             echo -Qstd=c99 ;;
3273             -flto)                echo -ipo ;;
3274         esac
3275     done
3276 }
3277
3278 icc_flags(){
3279     for flag; do
3280         case $flag in
3281             -flto)                echo -ipo ;;
3282             *)                    echo $flag ;;
3283         esac
3284     done
3285 }
3286
3287 pgi_flags(){
3288     for flag; do
3289         case $flag in
3290             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3291             -fomit-frame-pointer) echo -Mnoframe ;;
3292             -g)                   echo -gopt ;;
3293             *)                    echo $flag ;;
3294         esac
3295     done
3296 }
3297
3298 suncc_flags(){
3299     for flag; do
3300         case $flag in
3301             -march=*|-mcpu=*)
3302                 case "${flag#*=}" in
3303                     native)                   echo -xtarget=native       ;;
3304                     v9|niagara)               echo -xarch=sparc          ;;
3305                     ultrasparc)               echo -xarch=sparcvis       ;;
3306                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3307                     i586|pentium)             echo -xchip=pentium        ;;
3308                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3309                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3310                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3311                     pentium4*)          echo -xtarget=pentium4           ;;
3312                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3313                     *-sse3)             echo -xarch=sse3                 ;;
3314                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3315                     bonnell)                   echo -xarch=ssse3         ;;
3316                     corei7|nehalem)            echo -xtarget=nehalem     ;;
3317                     westmere)                  echo -xtarget=westmere    ;;
3318                     silvermont)                echo -xarch=sse4_2        ;;
3319                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
3320                     core-avx*|ivybridge|haswell|broadwell)
3321                                                echo -xarch=avx           ;;
3322                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
3323                     btver1)                    echo -xarch=amdsse4a      ;;
3324                     btver2|bdver*)             echo -xarch=avx           ;;
3325                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3326                     k8|opteron|athlon64|athlon-fx)
3327                                                echo -xarch=sse2a         ;;
3328                     athlon*)                   echo -xarch=pentium_proa  ;;
3329                 esac
3330                 ;;
3331             -std=c99)             echo -xc99              ;;
3332             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3333             -fPIC)                echo -KPIC -xcode=pic32 ;;
3334             -W*,*)                echo $flag              ;;
3335             -f*-*|-W*|-mimpure-text)                      ;;
3336             -shared)              echo -G                 ;;
3337             *)                    echo $flag              ;;
3338         esac
3339     done
3340 }
3341
3342 tms470_flags(){
3343     for flag; do
3344         case $flag in
3345             -march=*|-mcpu=*)
3346                 case "${flag#*=}" in
3347                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3348                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3349                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3350                     armv6*|arm11*)          echo -mv=6   ;;
3351                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3352                                             echo -mv=5e  ;;
3353                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3354                 esac
3355                 ;;
3356             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3357             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3358             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3359             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3360             -msoft-float)   echo --float_support=vfplib       ;;
3361             -O[0-3]|-mf=*)  echo $flag                        ;;
3362             -g)             echo -g -mn                       ;;
3363             -pds=*)         echo $flag                        ;;
3364             -D*|-I*)        echo $flag                        ;;
3365             --gcc|--abi=*)  echo $flag                        ;;
3366             -me)            echo $flag                        ;;
3367         esac
3368     done
3369 }
3370
3371 probe_cc(){
3372     pfx=$1
3373     _cc=$2
3374
3375     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3376     unset _ld_o _ldflags _ld_lib _ld_path
3377     unset _depflags _DEPCMD _DEPFLAGS
3378     _flags_filter=echo
3379
3380     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3381         true # no-op to avoid reading stdin in following checks
3382     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3383         _type=llvm_gcc
3384         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
3385         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
3386         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3387         _cflags_speed='-O3'
3388         _cflags_size='-Os'
3389     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3390         _type=gcc
3391         gcc_version=$($_cc --version | head -n1)
3392         gcc_basever=$($_cc -dumpversion)
3393         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3394         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3395         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3396         if ! $_cc -dumpversion | grep -q '^2\.'; then
3397             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3398         fi
3399         _cflags_speed='-O3'
3400         _cflags_size='-Os'
3401     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3402         _type=icc
3403         _ident=$($_cc --version | head -n1)
3404         _depflags='-MMD'
3405         _cflags_speed='-O3'
3406         _cflags_size='-Os'
3407         _cflags_noopt='-O1'
3408         _flags_filter=icc_flags
3409     elif $_cc -v 2>&1 | grep -q xlc; then
3410         _type=xlc
3411         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3412         _cflags_speed='-O5'
3413         _cflags_size='-O5 -qcompact'
3414     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3415         _type=ccc
3416         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3417         _DEPFLAGS='-M'
3418         _cflags_speed='-fast'
3419         _cflags_size='-O1'
3420         _flags_filter=ccc_flags
3421     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3422         test -d "$sysroot" || die "No valid sysroot specified."
3423         _type=armcc
3424         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3425         armcc_conf="$PWD/armcc.conf"
3426         $_cc --arm_linux_configure                 \
3427              --arm_linux_config_file="$armcc_conf" \
3428              --configure_sysroot="$sysroot"        \
3429              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3430              die "Error creating armcc configuration file."
3431         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3432         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3433         as_default="${cross_prefix}gcc"
3434         _depflags='-MMD'
3435         _cflags_speed='-O3'
3436         _cflags_size='-Os'
3437     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3438         _type=tms470
3439         _ident=$($_cc -version | head -n1 | tr -s ' ')
3440         _flags='--gcc --abi=eabi -me'
3441         _cc_e='-ppl -fe=$@'
3442         _cc_o='-fe=$@'
3443         _depflags='-ppa -ppd=$(@:.o=.d)'
3444         _cflags_speed='-O3 -mf=5'
3445         _cflags_size='-O3 -mf=2'
3446         _flags_filter=tms470_flags
3447     elif $_cc -v 2>&1 | grep -q clang; then
3448         _type=clang
3449         _ident=$($_cc --version | head -n1)
3450         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3451         _cflags_speed='-O3'
3452         _cflags_size='-Os'
3453     elif $_cc -V 2>&1 | grep -q Sun; then
3454         _type=suncc
3455         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3456         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3457         _DEPFLAGS='-xM1 -xc99'
3458         _ldflags='-std=c99'
3459         _cflags_speed='-O5'
3460         _cflags_size='-O5 -xspace'
3461         _flags_filter=suncc_flags
3462     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3463         _type=pathscale
3464         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3465         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3466         _cflags_speed='-O2'
3467         _cflags_size='-Os'
3468         _flags_filter='filter_out -Wdisabled-optimization'
3469     elif $_cc -v 2>&1 | grep -q Open64; then
3470         _type=open64
3471         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3472         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3473         _cflags_speed='-O2'
3474         _cflags_size='-Os'
3475         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3476     elif $_cc -V 2>&1 | grep -q Portland; then
3477         _type=pgi
3478         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3479         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3480         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3481         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3482         _cflags_noopt="-O"
3483         _flags_filter=pgi_flags
3484     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3485         _type=armasm
3486         _ident=$($_cc | head -n1)
3487         # 4509: "This form of conditional instruction is deprecated"
3488         _flags="-nologo -ignore 4509"
3489         _flags_filter=armasm_flags
3490     elif $_cc 2>&1 | grep -q Intel; then
3491         _type=icl
3492         _ident=$($cc 2>&1 | head -n1)
3493         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3494         # Not only is O3 broken on 13.x+ but it is slower on all previous
3495         # versions (tested) as well.
3496         _cflags_speed="-O2"
3497         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3498         if $_cc 2>&1 | grep -q Linker; then
3499             _ld_o='-out:$@'
3500         else
3501             _ld_o='-Fe$@'
3502         fi
3503         _cc_o='-Fo$@'
3504         _cc_e='-P'
3505         _flags_filter=icl_flags
3506         _ld_lib='lib%.a'
3507         _ld_path='-libpath:'
3508         # -Qdiag-error to make icl error when seeing certain unknown arguments
3509         _flags='-nologo -Qdiag-error:4044,10157'
3510         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
3511         # with MSVC which enables it by default.
3512         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS -fp:precise'
3513         if [ $pfx = hostcc ]; then
3514             append _cflags -Dsnprintf=_snprintf
3515         fi
3516         disable stripping
3517     elif $_cc 2>&1 | grep -q Microsoft; then
3518         _type=msvc
3519         _ident=$($cc 2>&1 | head -n1)
3520         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3521         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3522         _cflags_speed="-O2"
3523         _cflags_size="-O1"
3524         if $_cc 2>&1 | grep -q Linker; then
3525             _ld_o='-out:$@'
3526         else
3527             _ld_o='-Fe$@'
3528         fi
3529         _cc_o='-Fo$@'
3530         _cc_e='-P -Fi$@'
3531         _flags_filter=msvc_flags
3532         _ld_lib='lib%.a'
3533         _ld_path='-libpath:'
3534         _flags='-nologo'
3535         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3536         if [ $pfx = hostcc ]; then
3537             if [ -z "$cl_major_ver" ] || [ $cl_major_ver -le 18 ]; then
3538                 append _cflags -Dsnprintf=_snprintf
3539             fi
3540         fi
3541         disable stripping
3542     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3543         _type=cparser
3544         _ident=$($_cc --version | head -n1)
3545         _depflags='-MMD'
3546         _cflags_speed='-O4'
3547         _cflags_size='-O2'
3548         _flags_filter=cparser_flags
3549     fi
3550
3551     eval ${pfx}_type=\$_type
3552     eval ${pfx}_ident=\$_ident
3553 }
3554
3555 set_ccvars(){
3556     eval ${1}_C=\${_cc_c-\${${1}_C}}
3557     eval ${1}_E=\${_cc_e-\${${1}_E}}
3558     eval ${1}_O=\${_cc_o-\${${1}_O}}
3559
3560     if [ -n "$_depflags" ]; then
3561         eval ${1}_DEPFLAGS=\$_depflags
3562     else
3563         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3564         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3565         eval DEP${1}FLAGS=\$_flags
3566     fi
3567 }
3568
3569 probe_cc cc "$cc"
3570 cflags_filter=$_flags_filter
3571 cflags_speed=$_cflags_speed
3572 cflags_size=$_cflags_size
3573 cflags_noopt=$_cflags_noopt
3574 add_cflags $_flags $_cflags
3575 cc_ldflags=$_ldflags
3576 set_ccvars CC
3577
3578 probe_cc hostcc "$host_cc"
3579 host_cflags_filter=$_flags_filter
3580 add_host_cflags  $_flags $_cflags
3581 set_ccvars HOSTCC
3582
3583 test -n "$cc_type" && enable $cc_type ||
3584     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3585
3586 : ${as_default:=$cc}
3587 : ${dep_cc_default:=$cc}
3588 : ${ld_default:=$cc}
3589 : ${host_ld_default:=$host_cc}
3590 set_default ar as dep_cc ld host_ld windres
3591
3592 probe_cc as "$as"
3593 asflags_filter=$_flags_filter
3594 add_asflags $_flags $_cflags
3595 set_ccvars AS
3596
3597 probe_cc ld "$ld"
3598 ldflags_filter=$_flags_filter
3599 add_ldflags $_flags $_ldflags
3600 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3601 LD_O=${_ld_o-$LD_O}
3602 LD_LIB=${_ld_lib-$LD_LIB}
3603 LD_PATH=${_ld_path-$LD_PATH}
3604
3605 probe_cc hostld "$host_ld"
3606 host_ldflags_filter=$_flags_filter
3607 add_host_ldflags $_flags $_ldflags
3608 HOSTLD_O=${_ld_o-$HOSTLD_O}
3609
3610 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3611     probe_cc depcc "$dep_cc"
3612     CCDEP=${_DEPCMD:-$DEPCMD}
3613     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3614     DEPCCFLAGS=$_flags
3615 fi
3616
3617 if $ar 2>&1 | grep -q Microsoft; then
3618     arflags="-nologo"
3619     ar_o='-out:$@'
3620 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3621     arflags="rq"
3622     ar_o='$@'
3623 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3624     arflags='-Xany -r -c'
3625     ar_o='$@'
3626 elif $ar 2>&1 | grep -q "\[D\] "; then
3627     arflags="rcD"
3628     ar_o='$@'
3629 else
3630     arflags="rc"
3631     ar_o='$@'
3632 fi
3633
3634 add_cflags $extra_cflags
3635 add_cxxflags $extra_cxxflags
3636 add_asflags $extra_cflags
3637
3638 if test -n "$sysroot"; then
3639     case "$cc_type" in
3640         gcc|llvm_gcc|clang)
3641             add_cppflags --sysroot="$sysroot"
3642             add_ldflags --sysroot="$sysroot"
3643 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
3644             add_cppflags -isysroot "$sysroot"
3645             add_ldflags -isysroot "$sysroot"
3646         ;;
3647         tms470)
3648             add_cppflags -I"$sysinclude"
3649             add_ldflags  --sysroot="$sysroot"
3650         ;;
3651     esac
3652 fi
3653
3654 if test "$cpu" = host; then
3655     enabled cross_compile &&
3656         die "--cpu=host makes no sense when cross-compiling."
3657
3658     case "$cc_type" in
3659         gcc|llvm_gcc)
3660             check_native(){
3661                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3662                 sed -n "/cc1.*$1=/{
3663                             s/.*$1=\\([^ ]*\\).*/\\1/
3664                             p
3665                             q
3666                         }" $TMPE
3667             }
3668             cpu=$(check_native -march || check_native -mcpu)
3669         ;;
3670     esac
3671
3672     test "${cpu:-host}" = host &&
3673         die "--cpu=host not supported with compiler $cc"
3674 fi
3675
3676 # Deal with common $arch aliases
3677 case "$arch" in
3678     aarch64|arm64)
3679         arch="aarch64"
3680     ;;
3681     arm*|iPad*|iPhone*)
3682         arch="arm"
3683     ;;
3684     mips*|IP*)
3685         arch="mips"
3686     ;;
3687     parisc*|hppa*)
3688         arch="parisc"
3689     ;;
3690     "Power Macintosh"|ppc*|powerpc*)
3691         arch="ppc"
3692     ;;
3693     s390|s390x)
3694         arch="s390"
3695     ;;
3696     sh4|sh)
3697         arch="sh4"
3698     ;;
3699     sun4u|sparc*)
3700         arch="sparc"
3701     ;;
3702     tilegx|tile-gx)
3703         arch="tilegx"
3704     ;;
3705     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3706         arch="x86"
3707     ;;
3708 esac
3709
3710 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3711 enable $arch
3712
3713 # Add processor-specific flags
3714 if enabled aarch64; then
3715
3716     case $cpu in
3717         armv*)
3718             cpuflags="-march=$cpu"
3719         ;;
3720         *)
3721             cpuflags="-mcpu=$cpu"
3722         ;;
3723     esac
3724
3725 elif enabled alpha; then
3726
3727     cpuflags="-mcpu=$cpu"
3728
3729 elif enabled arm; then
3730
3731     check_arm_arch() {
3732         check_cpp_condition stddef.h \
3733             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3734             $cpuflags
3735     }
3736
3737     probe_arm_arch() {
3738         if   check_arm_arch 4;        then echo armv4;
3739         elif check_arm_arch 4T;       then echo armv4t;
3740         elif check_arm_arch 5;        then echo armv5;
3741         elif check_arm_arch 5E;       then echo armv5e;
3742         elif check_arm_arch 5T;       then echo armv5t;
3743         elif check_arm_arch 5TE;      then echo armv5te;
3744         elif check_arm_arch 5TEJ;     then echo armv5te;
3745         elif check_arm_arch 6;        then echo armv6;
3746         elif check_arm_arch 6J;       then echo armv6j;
3747         elif check_arm_arch 6K;       then echo armv6k;
3748         elif check_arm_arch 6Z;       then echo armv6z;
3749         elif check_arm_arch 6ZK;      then echo armv6zk;
3750         elif check_arm_arch 6T2;      then echo armv6t2;
3751         elif check_arm_arch 7;        then echo armv7;
3752         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3753         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3754         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3755         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3756         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3757         fi
3758     }
3759
3760     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3761
3762     case $cpu in
3763         armv*)
3764             cpuflags="-march=$cpu"
3765             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3766         ;;
3767         *)
3768             cpuflags="-mcpu=$cpu"
3769             case $cpu in
3770                 cortex-a*)                               subarch=armv7a  ;;
3771                 cortex-r*)                               subarch=armv7r  ;;
3772                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3773                 arm11*)                                  subarch=armv6   ;;
3774                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3775                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3776                 *)                             subarch=$(probe_arm_arch) ;;
3777             esac
3778         ;;
3779     esac
3780
3781     case "$subarch" in
3782         armv5t*)    enable fast_clz                ;;
3783         armv[6-8]*)
3784             enable fast_clz
3785             disabled fast_unaligned || enable fast_unaligned
3786             ;;
3787     esac
3788
3789 elif enabled avr32; then
3790
3791     case $cpu in
3792         ap7[02]0[0-2])
3793             subarch="avr32_ap"
3794             cpuflags="-mpart=$cpu"
3795         ;;
3796         ap)
3797             subarch="avr32_ap"
3798             cpuflags="-march=$cpu"
3799         ;;
3800         uc3[ab]*)
3801             subarch="avr32_uc"
3802             cpuflags="-mcpu=$cpu"
3803         ;;
3804         uc)
3805             subarch="avr32_uc"
3806             cpuflags="-march=$cpu"
3807         ;;
3808     esac
3809
3810 elif enabled bfin; then
3811
3812     cpuflags="-mcpu=$cpu"
3813
3814 elif enabled mips; then
3815
3816     cpuflags="-march=$cpu"
3817
3818     case $cpu in
3819         24kc)
3820             disable mipsfpu
3821             disable mipsdspr1
3822             disable mipsdspr2
3823         ;;
3824         24kf*)
3825             disable mipsdspr1
3826             disable mipsdspr2
3827         ;;
3828         24kec|34kc|1004kc)
3829             disable mipsfpu
3830             disable mipsdspr2
3831         ;;
3832         24kef*|34kf*|1004kf*)
3833             disable mipsdspr2
3834         ;;
3835         74kc)
3836             disable mipsfpu
3837         ;;
3838     esac
3839
3840 elif enabled ppc; then
3841
3842     disable ldbrx
3843     disable vsx
3844
3845     case $(tolower $cpu) in
3846         601|ppc601|powerpc601)
3847             cpuflags="-mcpu=601"
3848             disable altivec
3849         ;;
3850         603*|ppc603*|powerpc603*)
3851             cpuflags="-mcpu=603"
3852             disable altivec
3853         ;;
3854         604*|ppc604*|powerpc604*)
3855             cpuflags="-mcpu=604"
3856             disable altivec
3857         ;;
3858         g3|75*|ppc75*|powerpc75*)
3859             cpuflags="-mcpu=750"
3860             disable altivec
3861         ;;
3862         g4|745*|ppc745*|powerpc745*)
3863             cpuflags="-mcpu=7450"
3864         ;;
3865         74*|ppc74*|powerpc74*)
3866             cpuflags="-mcpu=7400"
3867         ;;
3868         g5|970|ppc970|powerpc970)
3869             cpuflags="-mcpu=970"
3870         ;;
3871         power[3-8]*)
3872             cpuflags="-mcpu=$cpu"
3873         ;;
3874         cell)
3875             cpuflags="-mcpu=cell"
3876             enable ldbrx
3877         ;;
3878         e500mc)
3879             cpuflags="-mcpu=e500mc"
3880             disable altivec
3881         ;;
3882         e500v2)
3883             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3884             disable altivec
3885             disable dcbzl
3886         ;;
3887         e500)
3888             cpuflags="-mcpu=8540 -mhard-float"
3889             disable altivec
3890             disable dcbzl
3891         ;;
3892     esac
3893
3894 elif enabled sparc; then
3895
3896     case $cpu in
3897         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3898             cpuflags="-mcpu=$cpu"
3899         ;;
3900         ultrasparc*|niagara[234])
3901             cpuflags="-mcpu=$cpu"
3902         ;;
3903     esac
3904
3905 elif enabled x86; then
3906
3907     case $cpu in
3908         i[345]86|pentium)
3909             cpuflags="-march=$cpu"
3910             disable i686
3911             disable mmx
3912         ;;
3913         # targets that do NOT support nopl and conditional mov (cmov)
3914         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3915             cpuflags="-march=$cpu"
3916             disable i686
3917         ;;
3918         # targets that do support nopl and conditional mov (cmov)
3919         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
3920         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|amdfam10|barcelona|b[dt]ver*)
3921             cpuflags="-march=$cpu"
3922             enable i686
3923             enable fast_cmov
3924         ;;
3925         # targets that do support conditional mov but on which it's slow
3926         pentium4|pentium4m|prescott|nocona)
3927             cpuflags="-march=$cpu"
3928             enable i686
3929             disable fast_cmov
3930         ;;
3931     esac
3932
3933 fi
3934
3935 if [ "$cpu" != generic ]; then
3936     add_cflags  $cpuflags
3937     add_asflags $cpuflags
3938 fi
3939
3940 # compiler sanity check
3941 check_exec <<EOF
3942 int main(void){ return 0; }
3943 EOF
3944 if test "$?" != 0; then
3945     echo "$cc is unable to create an executable file."
3946     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3947         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3948         echo "Only do this if you know what cross compiling means."
3949     fi
3950     die "C compiler test failed."
3951 fi
3952
3953 add_cppflags -D_ISOC99_SOURCE
3954 add_cxxflags -D__STDC_CONSTANT_MACROS
3955 check_cflags -std=c99
3956 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3957 #include <stdlib.h>
3958 EOF
3959 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3960 #include <stdlib.h>
3961 EOF
3962
3963 add_host_cppflags -D_ISOC99_SOURCE
3964 check_host_cflags -std=c99
3965 check_host_cflags -Wall
3966 check_host_cflags -O3
3967
3968 check_64bit(){
3969     arch32=$1
3970     arch64=$2
3971     expr=$3
3972     check_code cc "" "int test[2*($expr) - 1]" &&
3973         subarch=$arch64 || subarch=$arch32
3974 }
3975
3976 case "$arch" in
3977     aarch64|alpha|ia64)
3978         spic=$shared
3979     ;;
3980     mips)
3981         check_64bit mips mips64 '_MIPS_SIM > 1'
3982         spic=$shared
3983     ;;
3984     parisc)
3985         check_64bit parisc parisc64 'sizeof(void *) > 4'
3986         spic=$shared
3987     ;;
3988     ppc)
3989         check_64bit ppc ppc64 'sizeof(void *) > 4'
3990         spic=$shared
3991     ;;
3992     s390)
3993         check_64bit s390 s390x 'sizeof(void *) > 4'
3994         spic=$shared
3995     ;;
3996     sparc)
3997         check_64bit sparc sparc64 'sizeof(void *) > 4'
3998         spic=$shared
3999     ;;
4000     x86)
4001         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
4002         # Treat x32 as x64 for now. Note it also needs spic=$shared
4003         test "$subarch" = "x86_32" && check_cpp_condition stddef.h 'defined(__x86_64__)' &&
4004             subarch=x86_64
4005         if test "$subarch" = "x86_64"; then
4006             spic=$shared
4007         fi
4008     ;;
4009     ppc)
4010         check_cc <<EOF && subarch="ppc64"
4011         int test[(int)sizeof(char*) - 7];
4012 EOF
4013     ;;
4014 esac
4015
4016 enable $subarch
4017 enabled spic && enable_weak pic
4018
4019 # OS specific
4020 case $target_os in
4021     aix)
4022         SHFLAGS=-shared
4023         add_cppflags '-I\$(SRC_PATH)/compat/aix'
4024         enabled shared && add_ldflags -Wl,-brtl
4025         ;;
4026     android)
4027         disable symver
4028         enable section_data_rel_ro
4029         SLIB_INSTALL_NAME='$(SLIBNAME)'
4030         SLIB_INSTALL_LINKS=
4031         # soname not set on purpose
4032         SHFLAGS=-shared
4033         ;;
4034     haiku)
4035         prefix_default="/boot/common"
4036         network_extralibs="-lnetwork"
4037         host_libs=
4038         ;;
4039     sunos)
4040         SHFLAGS='-shared -Wl,-h,$$(@F)'
4041         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
4042         network_extralibs="-lsocket -lnsl"
4043         # When using suncc to build, the Solaris linker will mark
4044         # an executable with each instruction set encountered by
4045         # the Solaris assembler.  As our libraries contain their own
4046         # guards for processor-specific code, instead suppress
4047         # generation of the HWCAPS ELF section on Solaris x86 only.
4048         enabled_all suncc x86 &&
4049             echo "hwcap_1 = OVERRIDE;" > mapfile &&
4050             add_ldflags -Wl,-M,mapfile
4051         nm_default='nm -P -g'
4052         ;;
4053     netbsd)
4054         disable symver
4055         oss_indev_extralibs="-lossaudio"
4056         oss_outdev_extralibs="-lossaudio"
4057         enabled gcc || check_ldflags -Wl,-zmuldefs
4058         ;;
4059     openbsd|bitrig)
4060         disable symver
4061         SHFLAGS='-shared'
4062         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
4063         SLIB_INSTALL_LINKS=
4064         oss_indev_extralibs="-lossaudio"
4065         oss_outdev_extralibs="-lossaudio"
4066         ;;
4067     dragonfly)
4068         disable symver
4069         ;;
4070     freebsd)
4071         ;;
4072     bsd/os)
4073         add_extralibs -lpoll -lgnugetopt
4074         strip="strip -d"
4075         ;;
4076     darwin)
4077         enabled ppc && add_asflags -force_cpusubtype_ALL
4078         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
4079         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
4080         strip="${strip} -x"
4081         add_ldflags -Wl,-dynamic,-search_paths_first
4082         SLIBSUF=".dylib"
4083         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
4084         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
4085         objformat="macho"
4086         enabled x86_64 && objformat="macho64"
4087         enabled_any pic shared x86_64 ||
4088             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
4089         ;;
4090     mingw32*)
4091         if test $target_os = "mingw32ce"; then
4092             disable network
4093         else
4094             target_os=mingw32
4095         fi
4096         LIBTARGET=i386
4097         if enabled x86_64; then
4098             LIBTARGET="i386:x86-64"
4099         elif enabled arm; then
4100             LIBTARGET=arm-wince
4101         fi
4102         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4103         check_ldflags -Wl,--nxcompat
4104         check_ldflags -Wl,--dynamicbase
4105         enabled x86_32 && check_ldflags -Wl,--large-address-aware
4106         shlibdir_default="$bindir_default"
4107         SLIBPREF=""
4108         SLIBSUF=".dll"
4109         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4110         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4111         dlltool="${cross_prefix}dlltool"
4112         if check_cmd lib.exe -list; then
4113             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4114             if enabled x86_64; then
4115                 LIBTARGET=x64
4116             fi
4117         elif check_cmd $dlltool --version; then
4118             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
4119         fi
4120         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4121         SLIB_INSTALL_LINKS=
4122         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4123         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4124         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
4125         objformat="win32"
4126         ranlib=:
4127         enable dos_paths
4128         ;;
4129     win32|win64)
4130         disable symver
4131         if enabled shared; then
4132             # Link to the import library instead of the normal static library
4133             # for shared libs.
4134             LD_LIB='%.lib'
4135             # Cannot build both shared and static libs with MSVC or icl.
4136             disable static
4137         fi
4138         enabled x86_32 && check_ldflags -LARGEADDRESSAWARE
4139         shlibdir_default="$bindir_default"
4140         SLIBPREF=""
4141         SLIBSUF=".dll"
4142         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4143         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4144         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4145         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4146         SLIB_INSTALL_LINKS=
4147         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4148         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4149         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4150         objformat="win32"
4151         ranlib=:
4152         enable dos_paths
4153         ;;
4154     cygwin*)
4155         target_os=cygwin
4156         shlibdir_default="$bindir_default"
4157         SLIBPREF="cyg"
4158         SLIBSUF=".dll"
4159         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4160         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4161         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4162         SLIB_INSTALL_LINKS=
4163         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
4164         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
4165         objformat="win32"
4166         enable dos_paths
4167         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4168         ;;
4169     *-dos|freedos|opendos)
4170         network_extralibs="-lsocket"
4171         objformat="coff"
4172         enable dos_paths
4173         add_cppflags -U__STRICT_ANSI__
4174         ;;
4175     linux)
4176         enable dv1394
4177         enable section_data_rel_ro
4178         ;;
4179     irix*)
4180         target_os=irix
4181         ranlib="echo ignoring ranlib"
4182         ;;
4183     os/2*)
4184         strip="lxlite -CS"
4185         ln_s="cp -f"
4186         objformat="aout"
4187         add_cppflags -D_GNU_SOURCE
4188         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
4189         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4190         LIBSUF="_s.a"
4191         SLIBPREF=""
4192         SLIBSUF=".dll"
4193         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4194         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4195         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4196             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
4197             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4198             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4199             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4200             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
4201         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4202             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4203         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4204         enable dos_paths
4205         enable_weak os2threads
4206         ;;
4207     gnu/kfreebsd)
4208         add_cppflags -D_BSD_SOURCE
4209         ;;
4210     gnu)
4211         ;;
4212     qnx)
4213         add_cppflags -D_QNX_SOURCE
4214         network_extralibs="-lsocket"
4215         ;;
4216     symbian)
4217         SLIBSUF=".dll"
4218         enable dos_paths
4219         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4220         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4221         add_ldflags -Wl,--target1-abs,--no-undefined \
4222                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4223                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4224         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4225                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4226                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4227         ;;
4228     osf1)
4229         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4230         ;;
4231     minix)
4232         ;;
4233     plan9)
4234         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
4235                      -D_REENTRANT_SOURCE        \
4236                      -D_RESEARCH_SOURCE         \
4237                      -DFD_SETSIZE=96            \
4238                      -DHAVE_SOCK_OPTS
4239         add_compat strtod.o strtod=avpriv_strtod
4240         network_extralibs='-lbsd'
4241         exeobjs=compat/plan9/main.o
4242         disable ffserver
4243         cp_f='cp'
4244         ;;
4245     none)
4246         ;;
4247     *)
4248         die "Unknown OS '$target_os'."
4249         ;;
4250 esac
4251
4252 # determine libc flavour
4253
4254 probe_libc(){
4255     pfx=$1
4256     pfx_no_=${pfx%_}
4257     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4258     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4259         eval ${pfx}libc_type=uclibc
4260         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4261     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4262         eval ${pfx}libc_type=glibc
4263         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4264     # MinGW headers can be installed on Cygwin, so check for newlib first.
4265     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4266         eval ${pfx}libc_type=newlib
4267         add_${pfx}cppflags -U__STRICT_ANSI__
4268     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4269     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4270         eval ${pfx}libc_type=mingw64
4271         if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
4272             add_compat msvcrt/snprintf.o
4273             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
4274         fi
4275         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4276         eval test \$${pfx_no_}cc_type = "gcc" &&
4277             add_${pfx}cppflags -D__printf__=__gnu_printf__
4278     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4279          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4280         eval ${pfx}libc_type=mingw32
4281         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4282             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4283             die "ERROR: MinGW32 runtime version must be >= 3.15."
4284         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4285         eval test \$${pfx_no_}cc_type = "gcc" &&
4286             add_${pfx}cppflags -D__printf__=__gnu_printf__
4287     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4288         eval ${pfx}libc_type=msvcrt
4289         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4290         # 0x601 by default unless something else is set by the user.
4291         # This can easily lead to us detecting functions only present
4292         # in such new versions and producing binaries requiring windows 7.0.
4293         # Therefore explicitly set the default to XP unless the user has
4294         # set something else on the command line.
4295         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4296             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4297     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4298         eval ${pfx}libc_type=klibc
4299     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4300         eval ${pfx}libc_type=bionic
4301     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4302         eval ${pfx}libc_type=solaris
4303         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4304     fi
4305     check_${pfx}cc <<EOF
4306 #include <time.h>
4307 void *v = localtime_r;
4308 EOF
4309 test "$?" != 0 && check_${pfx}cc -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 <<EOF && add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4310 #include <time.h>
4311 void *v = localtime_r;
4312 EOF
4313
4314 }
4315
4316 probe_libc
4317 test -n "$libc_type" && enable libc_$libc_type
4318 probe_libc host_
4319 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4320
4321 case $libc_type in
4322     bionic)
4323         add_compat strtod.o strtod=avpriv_strtod
4324         ;;
4325     msvcrt)
4326         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -le 18 ]; then
4327             add_compat strtod.o strtod=avpriv_strtod
4328             add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4329                                          _snprintf=avpriv_snprintf  \
4330                                          vsnprintf=avpriv_vsnprintf
4331         fi
4332         ;;
4333 esac
4334
4335 # hacks for compiler/libc/os combinations
4336
4337 if enabled_all tms470 libc_glibc; then
4338     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4339     add_cppflags -D__USER_LABEL_PREFIX__=
4340     add_cppflags -D__builtin_memset=memset
4341     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4342     add_cflags   -pds=48    # incompatible redefinition of macro
4343 fi
4344
4345 if enabled_all ccc libc_glibc; then
4346     add_ldflags -Wl,-z,now  # calls to libots crash without this
4347 fi
4348
4349 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4350     add_cppflags '-I\$(SRC_PATH)/compat/float'
4351
4352 esc(){
4353     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4354 }
4355
4356 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
4357
4358 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4359
4360 set_default libdir
4361 : ${shlibdir_default:="$libdir"}
4362
4363 set_default $PATHS_LIST
4364 set_default nm
4365
4366 # we need to build at least one lib type
4367 if ! enabled_any static shared; then
4368     cat <<EOF
4369 At least one library type must be built.
4370 Specify --enable-static to build the static libraries or --enable-shared to
4371 build the shared libraries as well. To only build the shared libraries specify
4372 --disable-static in addition to --enable-shared.
4373 EOF
4374     exit 1;
4375 fi
4376
4377 die_license_disabled() {
4378     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4379 }
4380
4381 die_license_disabled_gpl() {
4382     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
4383 }
4384
4385 die_license_disabled gpl frei0r
4386 die_license_disabled gpl libcdio
4387 die_license_disabled gpl libsmbclient
4388 die_license_disabled gpl libutvideo
4389 die_license_disabled gpl libvidstab
4390 die_license_disabled gpl libx264
4391 die_license_disabled gpl libx265
4392 die_license_disabled gpl libxavs
4393 die_license_disabled gpl libxvid
4394 die_license_disabled gpl libzvbi
4395 die_license_disabled gpl x11grab
4396
4397 die_license_disabled nonfree libaacplus
4398 die_license_disabled nonfree libfaac
4399 die_license_disabled nonfree nvenc
4400 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
4401 enabled gpl && die_license_disabled_gpl nonfree openssl
4402
4403 die_license_disabled version3 libopencore_amrnb
4404 die_license_disabled version3 libopencore_amrwb
4405 die_license_disabled version3 libsmbclient
4406 die_license_disabled version3 libvo_aacenc
4407 die_license_disabled version3 libvo_amrwbenc
4408
4409 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4410
4411 disabled optimizations || check_cflags -fomit-frame-pointer
4412
4413 enable_weak_pic() {
4414     disabled pic && return
4415     enable pic
4416     add_cppflags -DPIC
4417     case "$target_os" in
4418     mingw*|cygwin*)
4419         ;;
4420     *)
4421         add_cflags -fPIC
4422         ;;
4423     esac
4424     add_asflags  -fPIC
4425 }
4426
4427 enabled pic && enable_weak_pic
4428
4429 check_cc <<EOF || die "Symbol mangling check failed."
4430 int ff_extern;
4431 EOF
4432 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4433 extern_prefix=${sym%%ff_extern*}
4434
4435 check_cc <<EOF && enable_weak inline_asm
4436 void foo(void) { __asm__ volatile ("" ::); }
4437 EOF
4438
4439 _restrict=
4440 for restrict_keyword in restrict __restrict__ __restrict; do
4441     check_cc <<EOF && _restrict=$restrict_keyword && break
4442 void foo(char * $restrict_keyword p);
4443 EOF
4444 done
4445
4446 check_cc <<EOF && enable pragma_deprecated
4447 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4448 EOF
4449
4450 check_cc <<EOF && enable attribute_packed
4451 struct { int x; } __attribute__((packed)) x;
4452 EOF
4453
4454 check_cc <<EOF && enable attribute_may_alias
4455 union { int x; } __attribute__((may_alias)) x;
4456 EOF
4457
4458 check_cc <<EOF || die "endian test failed"
4459 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4460 EOF
4461 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4462
4463 if  [ "$cpu" = "power7" ] || [ "$cpu" = "power8" ] || enabled ppc64; then
4464     if ! enabled bigendian && enabled altivec ;then
4465         enable vsx
4466     fi
4467 fi
4468
4469 check_gas() {
4470     log "check_gas using '$as' as AS"
4471     # :vararg is used on aarch64, arm and ppc altivec
4472     check_as <<EOF || return 1
4473 .macro m n, y:vararg=0
4474 \n: .int \y
4475 .endm
4476 m x
4477 EOF
4478     # .altmacro is only used in arm asm
4479     ! enabled arm || check_as <<EOF || return 1
4480 .altmacro
4481 EOF
4482     enable gnu_as
4483     return 0
4484 }
4485
4486 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4487     nogas=:
4488     enabled_any arm aarch64 && nogas=die
4489     enabled_all ppc altivec && [ $target_os_default != aix ] && nogas=warn
4490     as_noop=-v
4491
4492     case $as_type in
4493         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4494         gcc)  gaspp_as_type=gas ;;
4495         *)    gaspp_as_type=$as_type ;;
4496     esac
4497
4498     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4499
4500     test "${as#*gas-preprocessor.pl}" != "$as" ||
4501     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- ${as:=$cc} $as_noop &&
4502         gas="${gas:=gas-preprocessor.pl} -arch $arch -as-type $gaspp_as_type -- ${as:=$cc}"
4503
4504     if ! check_gas ; then
4505         as=${gas:=$as}
4506         check_gas || \
4507             $nogas "GNU assembler not found, install/update gas-preprocessor"
4508     fi
4509
4510     check_as <<EOF && enable as_func
4511 .func test
4512 .endfunc
4513 EOF
4514 fi
4515
4516 check_inline_asm inline_asm_labels '"1:\n"'
4517
4518 check_inline_asm inline_asm_nonlocal_labels '"Label:\n"'
4519
4520 if enabled aarch64; then
4521     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4522     # internal assembler in clang 3.3 does not support this instruction
4523     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4524     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4525
4526     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4527
4528 elif enabled alpha; then
4529
4530     check_cflags -mieee
4531
4532 elif enabled arm; then
4533
4534     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
4535 float func(float a, float b){ return a+b; }
4536 EOF
4537
4538     enabled thumb && check_cflags -mthumb || check_cflags -marm
4539
4540     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4541         enable vfp_args
4542     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
4543         case "${cross_prefix:-$cc}" in
4544             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4545             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4546 __asm__ (".eabi_attribute 28, 1");
4547 int main(void) { return 0; }
4548 EOF
4549         esac
4550         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4551     fi
4552
4553     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4554     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4555     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4556     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4557     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4558     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4559     enabled setend  && check_insn setend  'setend be'
4560
4561     [ $target_os = linux ] || [ $target_os = android ] ||
4562         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4563             $ARCH_EXT_LIST_ARM
4564
4565     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4566
4567     check_as <<EOF && enable as_dn_directive
4568 ra .dn d0.i16
4569 .unreq ra
4570 EOF
4571
4572     # llvm's integrated assembler supports .object_arch from llvm 3.5
4573     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4574 .object_arch armv4
4575 EOF
4576
4577     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4578
4579 elif enabled mips; then
4580
4581     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4582
4583     # Enable minimum ISA based on selected options
4584     if enabled mips64 && (enabled mipsdspr1 || enabled mipsdspr2); then
4585         add_cflags "-mips64r2"
4586         add_asflags "-mips64r2"
4587     elif enabled mips64 && enabled mipsfpu; then
4588         add_cflags "-mips64"
4589         add_asflags "-mips64"
4590     elif enabled mipsfpu || enabled mipsdspr1 || enabled mipsdspr2; then
4591         add_cflags "-mips32r2"
4592         add_asflags "-mips32r2"
4593     fi
4594
4595     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
4596      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
4597     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
4598      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
4599     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
4600      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
4601
4602 elif enabled parisc; then
4603
4604     if enabled gcc; then
4605         case $($cc -dumpversion) in
4606             4.[3-9].*) check_cflags -fno-optimize-sibling-calls ;;
4607         esac
4608     fi
4609
4610 elif enabled ppc; then
4611
4612     enable local_aligned_8 local_aligned_16 local_aligned_32
4613
4614     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4615     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4616     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4617     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4618
4619     # AltiVec flags: The FSF version of GCC differs from the Apple version
4620     if enabled altivec; then
4621         check_cflags -maltivec -mabi=altivec &&
4622         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4623         check_cflags -faltivec
4624
4625         # check if our compiler supports Motorola AltiVec C API
4626         check_cc <<EOF || disable altivec
4627 $inc_altivec_h
4628 int main(void) {
4629     vector signed int v1 = (vector signed int) { 0 };
4630     vector signed int v2 = (vector signed int) { 1 };
4631     v1 = vec_add(v1, v2);
4632     return 0;
4633 }
4634 EOF
4635
4636         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4637     fi
4638
4639     if enabled vsx; then
4640         check_cflags -mvsx
4641     fi
4642 elif enabled x86; then
4643
4644     check_builtin rdtsc    intrin.h   "__rdtsc()"
4645     check_builtin mm_empty mmintrin.h "_mm_empty()"
4646
4647     enable local_aligned_8 local_aligned_16 local_aligned_32
4648
4649     # check whether EBP is available on x86
4650     # As 'i' is stored on the stack, this program will crash
4651     # if the base pointer is used to access it because the
4652     # base pointer is cleared in the inline assembly code.
4653     check_exec_crash <<EOF && enable ebp_available
4654 volatile int i=0;
4655 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4656 return i;
4657 EOF
4658
4659     # check whether EBX is available on x86
4660     check_inline_asm ebx_available '""::"b"(0)' &&
4661         check_inline_asm ebx_available '"":::"%ebx"'
4662
4663     # check whether xmm clobbers are supported
4664     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4665
4666     check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test, %eax"' ||
4667         check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test(%rip), %eax"'
4668
4669     # check whether binutils is new enough to compile SSSE3/MMXEXT
4670     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4671     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4672
4673     if ! disabled_any asm mmx yasm; then
4674         if check_cmd $yasmexe --version; then
4675             enabled x86_64 && yasm_extra="-m amd64"
4676             yasm_debug="-g dwarf2"
4677         elif check_cmd nasm -v; then
4678             yasmexe=nasm
4679             yasm_debug="-g -F dwarf"
4680             if enabled x86_64; then
4681                 case "$objformat" in
4682                     elf)   objformat=elf64 ;;
4683                     win32) objformat=win64 ;;
4684                 esac
4685             fi
4686         fi
4687
4688         YASMFLAGS="-f $objformat $yasm_extra"
4689         enabled pic               && append YASMFLAGS "-DPIC"
4690         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4691         case "$objformat" in
4692             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4693         esac
4694
4695         check_yasm "movbe ecx, [5]" && enable yasm ||
4696             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4697         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4698         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4699         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4700         check_yasm "CPU amdnop" || disable cpunop
4701     fi
4702
4703     case "$cpu" in
4704         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4705             disable fast_clz
4706         ;;
4707     esac
4708
4709 fi
4710
4711 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4712
4713 check_ldflags -Wl,--as-needed
4714 check_ldflags -Wl,-z,noexecstack
4715
4716 if check_func dlopen; then
4717     ldl=
4718 elif check_func dlopen -ldl; then
4719     ldl=-ldl
4720 fi
4721
4722 frei0r_filter_extralibs='$ldl'
4723 frei0r_src_filter_extralibs='$ldl'
4724 ladspa_filter_extralibs='$ldl'
4725 nvenc_encoder_extralibs='$ldl'
4726
4727 if ! disabled network; then
4728     check_func getaddrinfo $network_extralibs
4729     check_func getservbyport $network_extralibs
4730     check_func inet_aton $network_extralibs
4731
4732     check_type netdb.h "struct addrinfo"
4733     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4734     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4735     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4736     check_type poll.h "struct pollfd"
4737     check_type netinet/sctp.h "struct sctp_event_subscribe"
4738     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4739     check_type netinet/in.h "struct sockaddr_in6"
4740     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4741     check_type "sys/types.h sys/socket.h" socklen_t
4742
4743     # Prefer arpa/inet.h over winsock2
4744     if check_header arpa/inet.h ; then
4745         check_func closesocket
4746     elif check_header winsock2.h ; then
4747         check_func_headers winsock2.h closesocket -lws2 &&
4748             network_extralibs="-lws2" ||
4749         { check_func_headers winsock2.h closesocket -lws2_32 &&
4750             network_extralibs="-lws2_32"; } || disable winsock2_h network
4751         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4752
4753         check_type ws2tcpip.h socklen_t
4754         check_type ws2tcpip.h "struct addrinfo"
4755         check_type ws2tcpip.h "struct group_source_req"
4756         check_type ws2tcpip.h "struct ip_mreq_source"
4757         check_type ws2tcpip.h "struct ipv6_mreq"
4758         check_type winsock2.h "struct pollfd"
4759         check_struct winsock2.h "struct sockaddr" sa_len
4760         check_type ws2tcpip.h "struct sockaddr_in6"
4761         check_type ws2tcpip.h "struct sockaddr_storage"
4762     else
4763         disable network
4764     fi
4765 fi
4766
4767 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4768 check_builtin atomic_compare_exchange "" "int *ptr, *oldval; int newval; __atomic_compare_exchange_n(ptr, oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)"
4769 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4770 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4771 check_builtin sarestart signal.h "SA_RESTART"
4772 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4773
4774 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4775 check_func  ${malloc_prefix}memalign            && enable memalign
4776 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4777
4778 check_func  access
4779 check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4780 check_func  fcntl
4781 check_func  fork
4782 check_func  gethrtime
4783 check_func  getopt
4784 check_func  getrusage
4785 check_func  gettimeofday
4786 check_func  gmtime_r
4787 check_func  isatty
4788 check_func  localtime_r
4789 check_func  mach_absolute_time
4790 check_func  mkstemp
4791 check_func  mmap
4792 check_func  mprotect
4793 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4794 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4795 check_func  sched_getaffinity
4796 check_func  setrlimit
4797 check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE
4798 check_func  strerror_r
4799 check_func  sysconf
4800 check_func  sysctl
4801 check_func  usleep
4802
4803 check_func_headers conio.h kbhit
4804 check_func_headers io.h setmode
4805 check_func_headers lzo/lzo1x.h lzo1x_999_compress
4806 check_func_headers stdlib.h getenv
4807
4808 check_func_headers windows.h CoTaskMemFree -lole32
4809 check_func_headers windows.h GetProcessAffinityMask
4810 check_func_headers windows.h GetProcessTimes
4811 check_func_headers windows.h GetSystemTimeAsFileTime
4812 check_func_headers windows.h MapViewOfFile
4813 check_func_headers windows.h PeekNamedPipe
4814 check_func_headers windows.h SetConsoleTextAttribute
4815 check_func_headers windows.h Sleep
4816 check_func_headers windows.h VirtualAlloc
4817 check_struct windows.h "CONDITION_VARIABLE" Ptr
4818 check_func_headers glob.h glob
4819 enabled xlib &&
4820     check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
4821
4822 check_header direct.h
4823 check_header dlfcn.h
4824 check_header dxva.h
4825 check_header dxva2api.h -D_WIN32_WINNT=0x0600
4826 check_header io.h
4827 check_header libcrystalhd/libcrystalhd_if.h
4828 check_header mach/mach_time.h
4829 check_header malloc.h
4830 check_header net/udplite.h
4831 check_header poll.h