51999de58c64f2f8c32bbae59900c5f75c50a303
[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 [auto]
137   --disable-w32threads     disable Win32 threads [auto]
138   --disable-os2threads     disable OS/2 threads [auto]
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-libmodplug      enable ModPlug via libmodplug [no]
223   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
224   --enable-libnut          enable NUT (de)muxing via libnut,
225                            native (de)muxer exists [no]
226   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
227   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
228   --enable-libopencv       enable video filtering via libopencv [no]
229   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
230   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
231   --enable-libopus         enable Opus de/encoding via libopus [no]
232   --enable-libpulse        enable Pulseaudio input via libpulse [no]
233   --enable-libquvi         enable quvi input via libquvi [no]
234   --enable-librtmp         enable RTMP[E] support via librtmp [no]
235   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
236   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
237   --enable-libsmbclient    enable Samba protocol via libsmbclient [no]
238   --enable-libsoxr         enable Include libsoxr resampling [no]
239   --enable-libspeex        enable Speex de/encoding via libspeex [no]
240   --enable-libssh          enable SFTP protocol via libssh [no]
241   --enable-libstagefright-h264  enable H.264 decoding via libstagefright [no]
242   --enable-libtheora       enable Theora encoding via libtheora [no]
243   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
244   --enable-libutvideo      enable Ut Video encoding and decoding via libutvideo [no]
245   --enable-libv4l2         enable libv4l2/v4l-utils [no]
246   --enable-libvidstab      enable video stabilization using vid.stab [no]
247   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
248   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
249   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
250                            native implementation exists [no]
251   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
252   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
253   --enable-libwebp         enable WebP encoding via libwebp [no]
254   --enable-libx264         enable H.264 encoding via x264 [no]
255   --enable-libx265         enable HEVC encoding via x265 [no]
256   --enable-libxavs         enable AVS encoding via xavs [no]
257   --enable-libxcb          enable X11 grabbing using XCB [auto]
258   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
259   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
260   --enable-libxcb-shape    enable X11 grabbing shape rendering [auto]
261   --enable-libxvid         enable Xvid encoding via xvidcore,
262                            native MPEG-4/Xvid encoder exists [no]
263   --enable-libzmq          enable message passing via libzmq [no]
264   --enable-libzvbi         enable teletext support via libzvbi [no]
265   --disable-lzma           disable lzma [autodetect]
266   --enable-decklink        enable Blackmagick DeckLink I/O support [no]
267   --enable-nvenc           enable NVIDIA NVENC support [no]
268   --enable-openal          enable OpenAL 1.1 capture support [no]
269   --enable-opencl          enable OpenCL code
270   --enable-opengl          enable OpenGL rendering [no]
271   --enable-openssl         enable openssl, needed for https support
272                            if gnutls is not used [no]
273   --disable-sdl            disable sdl [autodetect]
274   --enable-x11grab         enable X11 grabbing (legacy) [no]
275   --disable-xlib           disable xlib [autodetect]
276   --disable-zlib           disable zlib [autodetect]
277
278 Toolchain options:
279   --arch=ARCH              select architecture [$arch]
280   --cpu=CPU                select the minimum required CPU (affects
281                            instruction selection, may crash on older CPUs)
282   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
283   --progs-suffix=SUFFIX    program name suffix []
284   --enable-cross-compile   assume a cross-compiler is used
285   --sysroot=PATH           root of cross-build tree
286   --sysinclude=PATH        location of cross-build system headers
287   --target-os=OS           compiler targets OS [$target_os]
288   --target-exec=CMD        command to run executables on target
289   --target-path=DIR        path to view of build directory on target
290   --target-samples=DIR     path to samples directory on target
291   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
292   --toolchain=NAME         set tool defaults according to NAME
293   --nm=NM                  use nm tool NM [$nm_default]
294   --ar=AR                  use archive tool AR [$ar_default]
295   --as=AS                  use assembler AS [$as_default]
296   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
297   --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]
298   --cc=CC                  use C compiler CC [$cc_default]
299   --cxx=CXX                use C compiler CXX [$cxx_default]
300   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
301   --ld=LD                  use linker LD [$ld_default]
302   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
303   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
304   --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
305   --doxygen=DOXYGEN        use DOXYGEN to generate API doc [$doxygen_default]
306   --host-cc=HOSTCC         use host C compiler HOSTCC
307   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
308   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
309   --host-ld=HOSTLD         use host linker HOSTLD
310   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
311   --host-libs=HLIBS        use libs HLIBS when linking for host
312   --host-os=OS             compiler host OS [$target_os]
313   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
314   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
315   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
316   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
317   --extra-libs=ELIBS       add ELIBS [$ELIBS]
318   --extra-version=STRING   version string suffix []
319   --optflags=OPTFLAGS      override optimization-related compiler flags
320   --build-suffix=SUFFIX    library name suffix []
321   --enable-pic             build position-independent code
322   --enable-thumb           compile for Thumb instruction set
323   --enable-lto             use link-time optimization
324
325 Advanced options (experts only):
326   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
327   --disable-symver         disable symbol versioning
328   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
329   --disable-safe-bitstream-reader
330                            disable buffer boundary checking in bitreaders
331                            (faster, but may crash)
332   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
333   --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
334
335 Optimization options (experts only):
336   --disable-asm            disable all assembly optimizations
337   --disable-altivec        disable AltiVec optimizations
338   --disable-amd3dnow       disable 3DNow! optimizations
339   --disable-amd3dnowext    disable 3DNow! extended optimizations
340   --disable-mmx            disable MMX optimizations
341   --disable-mmxext         disable MMXEXT optimizations
342   --disable-sse            disable SSE optimizations
343   --disable-sse2           disable SSE2 optimizations
344   --disable-sse3           disable SSE3 optimizations
345   --disable-ssse3          disable SSSE3 optimizations
346   --disable-sse4           disable SSE4 optimizations
347   --disable-sse42          disable SSE4.2 optimizations
348   --disable-avx            disable AVX optimizations
349   --disable-xop            disable XOP optimizations
350   --disable-fma3           disable FMA3 optimizations
351   --disable-fma4           disable FMA4 optimizations
352   --disable-avx2           disable AVX2 optimizations
353   --disable-armv5te        disable armv5te optimizations
354   --disable-armv6          disable armv6 optimizations
355   --disable-armv6t2        disable armv6t2 optimizations
356   --disable-vfp            disable VFP optimizations
357   --disable-neon           disable NEON optimizations
358   --disable-inline-asm     disable use of inline assembly
359   --disable-yasm           disable use of nasm/yasm assembly
360   --disable-mips32r2       disable MIPS32R2 optimizations
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     remuxing_example
1332     resampling_audio_example
1333     scaling_video_example
1334     transcode_aac_example
1335     transcoding_example
1336 "
1337
1338 EXTERNAL_LIBRARY_LIST="
1339     avisynth
1340     bzlib
1341     crystalhd
1342     decklink
1343     frei0r
1344     gnutls
1345     iconv
1346     ladspa
1347     libaacplus
1348     libass
1349     libbluray
1350     libbs2b
1351     libcaca
1352     libcdio
1353     libcelt
1354     libdc1394
1355     libfaac
1356     libfdk_aac
1357     libflite
1358     libfontconfig
1359     libfreetype
1360     libfribidi
1361     libgme
1362     libgsm
1363     libiec61883
1364     libilbc
1365     libmodplug
1366     libmp3lame
1367     libnut
1368     libopencore_amrnb
1369     libopencore_amrwb
1370     libopencv
1371     libopenh264
1372     libopenjpeg
1373     libopus
1374     libpulse
1375     libquvi
1376     librtmp
1377     libschroedinger
1378     libshine
1379     libsmbclient
1380     libsoxr
1381     libspeex
1382     libssh
1383     libstagefright_h264
1384     libtheora
1385     libtwolame
1386     libutvideo
1387     libv4l2
1388     libvidstab
1389     libvo_aacenc
1390     libvo_amrwbenc
1391     libvorbis
1392     libvpx
1393     libwavpack
1394     libwebp
1395     libx264
1396     libx265
1397     libxavs
1398     libxcb
1399     libxcb_shm
1400     libxcb_shape
1401     libxcb_xfixes
1402     libxvid
1403     libzmq
1404     libzvbi
1405     lzma
1406     nvenc
1407     openal
1408     opencl
1409     opengl
1410     openssl
1411     sdl
1412     x11grab
1413     xlib
1414     zlib
1415 "
1416
1417 DOCUMENT_LIST="
1418     doc
1419     htmlpages
1420     manpages
1421     podpages
1422     txtpages
1423 "
1424
1425 FEATURE_LIST="
1426     ftrapv
1427     gray
1428     hardcoded_tables
1429     runtime_cpudetect
1430     safe_bitstream_reader
1431     shared
1432     small
1433     static
1434     swscale_alpha
1435 "
1436
1437 HWACCEL_LIST="
1438     dxva2
1439     vaapi
1440     vda
1441     vdpau
1442     xvmc
1443 "
1444
1445 LIBRARY_LIST="
1446     avcodec
1447     avdevice
1448     avfilter
1449     avformat
1450     avresample
1451     avutil
1452     postproc
1453     swresample
1454     swscale
1455 "
1456
1457 LICENSE_LIST="
1458     gpl
1459     nonfree
1460     version3
1461 "
1462
1463 PROGRAM_LIST="
1464     ffplay
1465     ffprobe
1466     ffserver
1467     ffmpeg
1468 "
1469
1470 SUBSYSTEM_LIST="
1471     dct
1472     dwt
1473     error_resilience
1474     faan
1475     fast_unaligned
1476     fft
1477     lsp
1478     lzo
1479     mdct
1480     pixelutils
1481     network
1482     rdft
1483 "
1484
1485 CONFIG_LIST="
1486     $COMPONENT_LIST
1487     $DOCUMENT_LIST
1488     $EXAMPLE_LIST
1489     $EXTERNAL_LIBRARY_LIST
1490     $FEATURE_LIST
1491     $HWACCEL_LIST
1492     $LICENSE_LIST
1493     $LIBRARY_LIST
1494     $PROGRAM_LIST
1495     $SUBSYSTEM_LIST
1496     fontconfig
1497     incompatible_libav_abi
1498     memalign_hack
1499     memory_poisoning
1500     neon_clobber_test
1501     pic
1502     pod2man
1503     raise_major
1504     thumb
1505     xmm_clobber_test
1506 "
1507
1508 THREADS_LIST="
1509     pthreads
1510     os2threads
1511     w32threads
1512 "
1513
1514 ATOMICS_LIST="
1515     atomics_gcc
1516     atomics_suncc
1517     atomics_win32
1518 "
1519
1520 ARCH_LIST="
1521     aarch64
1522     alpha
1523     arm
1524     avr32
1525     avr32_ap
1526     avr32_uc
1527     bfin
1528     ia64
1529     m68k
1530     mips
1531     mips64
1532     parisc
1533     ppc
1534     ppc64
1535     s390
1536     sh4
1537     sparc
1538     sparc64
1539     tilegx
1540     tilepro
1541     tomi
1542     x86
1543     x86_32
1544     x86_64
1545 "
1546
1547 ARCH_EXT_LIST_ARM="
1548     armv5te
1549     armv6
1550     armv6t2
1551     armv8
1552     neon
1553     vfp
1554     vfpv3
1555     setend
1556 "
1557
1558 ARCH_EXT_LIST_MIPS="
1559     mipsfpu
1560     mips32r2
1561     mipsdspr1
1562     mipsdspr2
1563 "
1564
1565 ARCH_EXT_LIST_X86_SIMD="
1566     amd3dnow
1567     amd3dnowext
1568     avx
1569     avx2
1570     fma3
1571     fma4
1572     mmx
1573     mmxext
1574     sse
1575     sse2
1576     sse3
1577     sse4
1578     sse42
1579     ssse3
1580     xop
1581 "
1582
1583 ARCH_EXT_LIST_PPC="
1584     altivec
1585     dcbzl
1586     ldbrx
1587     ppc4xx
1588     vsx
1589 "
1590
1591 ARCH_EXT_LIST_X86="
1592     $ARCH_EXT_LIST_X86_SIMD
1593     cpunop
1594     i686
1595 "
1596
1597 ARCH_EXT_LIST="
1598     $ARCH_EXT_LIST_ARM
1599     $ARCH_EXT_LIST_PPC
1600     $ARCH_EXT_LIST_X86
1601     $ARCH_EXT_LIST_MIPS
1602     loongson
1603 "
1604
1605 ARCH_FEATURES="
1606     aligned_stack
1607     fast_64bit
1608     fast_clz
1609     fast_cmov
1610     local_aligned_8
1611     local_aligned_16
1612     local_aligned_32
1613     simd_align_16
1614 "
1615
1616 BUILTIN_LIST="
1617     atomic_cas_ptr
1618     atomic_compare_exchange
1619     machine_rw_barrier
1620     MemoryBarrier
1621     mm_empty
1622     rdtsc
1623     sarestart
1624     sync_val_compare_and_swap
1625 "
1626 HAVE_LIST_CMDLINE="
1627     inline_asm
1628     symver
1629     yasm
1630 "
1631
1632 HAVE_LIST_PUB="
1633     bigendian
1634     fast_unaligned
1635     incompatible_libav_abi
1636 "
1637
1638 HEADERS_LIST="
1639     alsa_asoundlib_h
1640     altivec_h
1641     arpa_inet_h
1642     asm_types_h
1643     cdio_paranoia_h
1644     cdio_paranoia_paranoia_h
1645     CL_cl_h
1646     dev_bktr_ioctl_bt848_h
1647     dev_bktr_ioctl_meteor_h
1648     dev_ic_bt8xx_h
1649     dev_video_bktr_ioctl_bt848_h
1650     dev_video_meteor_ioctl_meteor_h
1651     direct_h
1652     dlfcn_h
1653     dxva_h
1654     ES2_gl_h
1655     gsm_h
1656     io_h
1657     mach_mach_time_h
1658     machine_ioctl_bt848_h
1659     machine_ioctl_meteor_h
1660     malloc_h
1661     openjpeg_1_5_openjpeg_h
1662     OpenGL_gl3_h
1663     poll_h
1664     sndio_h
1665     soundcard_h
1666     sys_mman_h
1667     sys_param_h
1668     sys_resource_h
1669     sys_select_h
1670     sys_soundcard_h
1671     sys_time_h
1672     sys_un_h
1673     sys_videoio_h
1674     termios_h
1675     udplite_h
1676     unistd_h
1677     windows_h
1678     winsock2_h
1679 "
1680
1681 INTRINSICS_LIST="
1682     intrinsics_neon
1683 "
1684
1685 MATH_FUNCS="
1686     atanf
1687     atan2f
1688     cbrt
1689     cbrtf
1690     cosf
1691     exp2
1692     exp2f
1693     expf
1694     isinf
1695     isnan
1696     ldexpf
1697     llrint
1698     llrintf
1699     log2
1700     log2f
1701     log10f
1702     lrint
1703     lrintf
1704     powf
1705     rint
1706     round
1707     roundf
1708     sinf
1709     trunc
1710     truncf
1711 "
1712
1713 SYSTEM_FUNCS="
1714     access
1715     aligned_malloc
1716     clock_gettime
1717     closesocket
1718     CommandLineToArgvW
1719     CoTaskMemFree
1720     CryptGenRandom
1721     dlopen
1722     fcntl
1723     flt_lim
1724     fork
1725     getaddrinfo
1726     gethrtime
1727     getopt
1728     GetProcessAffinityMask
1729     GetProcessMemoryInfo
1730     GetProcessTimes
1731     getrusage
1732     getservbyport
1733     GetSystemTimeAsFileTime
1734     gettimeofday
1735     glob
1736     glXGetProcAddress
1737     gmtime_r
1738     inet_aton
1739     isatty
1740     jack_port_get_latency_range
1741     kbhit
1742     localtime_r
1743     lzo1x_999_compress
1744     mach_absolute_time
1745     MapViewOfFile
1746     memalign
1747     mkstemp
1748     mmap
1749     mprotect
1750     nanosleep
1751     PeekNamedPipe
1752     posix_memalign
1753     pthread_cancel
1754     sched_getaffinity
1755     SetConsoleTextAttribute
1756     setmode
1757     setrlimit
1758     Sleep
1759     strerror_r
1760     sysconf
1761     sysctl
1762     usleep
1763     VirtualAlloc
1764     wglGetProcAddress
1765 "
1766
1767 TOOLCHAIN_FEATURES="
1768     as_dn_directive
1769     as_func
1770     asm_mod_q
1771     attribute_may_alias
1772     attribute_packed
1773     ebp_available
1774     ebx_available
1775     gnu_as
1776     gnu_windres
1777     ibm_asm
1778     inline_asm_labels
1779     inline_asm_nonlocal_labels
1780     inline_asm_direct_symbol_refs
1781     pragma_deprecated
1782     rsync_contimeout
1783     symver_asm_label
1784     symver_gnu_asm
1785     vfp_args
1786     xform_asm
1787     xmm_clobbers
1788 "
1789
1790 TYPES_LIST="
1791     CONDITION_VARIABLE_Ptr
1792     socklen_t
1793     struct_addrinfo
1794     struct_group_source_req
1795     struct_ip_mreq_source
1796     struct_ipv6_mreq
1797     struct_pollfd
1798     struct_rusage_ru_maxrss
1799     struct_sctp_event_subscribe
1800     struct_sockaddr_in6
1801     struct_sockaddr_sa_len
1802     struct_sockaddr_storage
1803     struct_stat_st_mtim_tv_nsec
1804     struct_v4l2_frmivalenum_discrete
1805 "
1806
1807 HAVE_LIST="
1808     $ARCH_EXT_LIST
1809     $(add_suffix _external $ARCH_EXT_LIST)
1810     $(add_suffix _inline   $ARCH_EXT_LIST)
1811     $ARCH_FEATURES
1812     $ATOMICS_LIST
1813     $BUILTIN_LIST
1814     $HAVE_LIST_CMDLINE
1815     $HAVE_LIST_PUB
1816     $HEADERS_LIST
1817     $INTRINSICS_LIST
1818     $MATH_FUNCS
1819     $SYSTEM_FUNCS
1820     $THREADS_LIST
1821     $TOOLCHAIN_FEATURES
1822     $TYPES_LIST
1823     atomics_native
1824     dos_paths
1825     dxva2api_cobj
1826     dxva2_lib
1827     libc_msvcrt
1828     libdc1394_1
1829     libdc1394_2
1830     makeinfo
1831     makeinfo_html
1832     perl
1833     pod2man
1834     sdl
1835     section_data_rel_ro
1836     texi2html
1837     threads
1838     vdpau_x11
1839     xlib
1840 "
1841
1842 # options emitted with CONFIG_ prefix but not available on the command line
1843 CONFIG_EXTRA="
1844     aandcttables
1845     ac3dsp
1846     audio_frame_queue
1847     audiodsp
1848     blockdsp
1849     bswapdsp
1850     cabac
1851     dvprofile
1852     exif
1853     faandct
1854     faanidct
1855     fdctdsp
1856     frame_thread_encoder
1857     gcrypt
1858     golomb
1859     gplv3
1860     h263dsp
1861     h264chroma
1862     h264dsp
1863     h264pred
1864     h264qpel
1865     hpeldsp
1866     huffman
1867     huffyuvdsp
1868     huffyuvencdsp
1869     idctdsp
1870     iirfilter
1871     intrax8
1872     lgplv3
1873     llauddsp
1874     llviddsp
1875     lpc
1876     me_cmp
1877     mpeg_er
1878     mpegaudio
1879     mpegaudiodsp
1880     mpegvideo
1881     mpegvideoenc
1882     nettle
1883     pixblockdsp
1884     qpeldsp
1885     rangecoder
1886     riffdec
1887     riffenc
1888     rtpdec
1889     rtpenc_chain
1890     sinewin
1891     startcode
1892     tpeldsp
1893     videodsp
1894     vp3dsp
1895     wma_freqs
1896 "
1897
1898 CMDLINE_SELECT="
1899     $ARCH_EXT_LIST
1900     $CONFIG_LIST
1901     $HAVE_LIST_CMDLINE
1902     $THREADS_LIST
1903     asm
1904     cross_compile
1905     debug
1906     extra_warnings
1907     logging
1908     lto
1909     optimizations
1910     rpath
1911     stripping
1912 "
1913
1914 PATHS_LIST="
1915     bindir
1916     datadir
1917     docdir
1918     incdir
1919     libdir
1920     mandir
1921     prefix
1922     shlibdir
1923 "
1924
1925 CMDLINE_SET="
1926     $PATHS_LIST
1927     ar
1928     arch
1929     as
1930     assert_level
1931     build_suffix
1932     cc
1933     cpu
1934     cross_prefix
1935     cxx
1936     dep_cc
1937     doxygen
1938     extra_version
1939     gas
1940     host_cc
1941     host_cflags
1942     host_ld
1943     host_ldflags
1944     host_libs
1945     host_os
1946     install
1947     ld
1948     logfile
1949     malloc_prefix
1950     nm
1951     optflags
1952     pkg_config
1953     pkg_config_flags
1954     progs_suffix
1955     random_seed
1956     ranlib
1957     samples
1958     strip
1959     sws_max_filter_size
1960     sysinclude
1961     sysroot
1962     target_exec
1963     target_os
1964     target_path
1965     target_samples
1966     tempprefix
1967     toolchain
1968     valgrind
1969     yasmexe
1970 "
1971
1972 CMDLINE_APPEND="
1973     extra_cflags
1974     extra_cxxflags
1975     host_cppflags
1976 "
1977
1978 # code dependency declarations
1979
1980 # architecture extensions
1981
1982 armv5te_deps="arm"
1983 armv6_deps="arm"
1984 armv6t2_deps="arm"
1985 armv8_deps="aarch64"
1986 neon_deps_any="aarch64 arm"
1987 intrinsics_neon_deps="neon"
1988 vfp_deps_any="aarch64 arm"
1989 vfpv3_deps="vfp"
1990 setend_deps="arm"
1991
1992 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1993
1994 mipsfpu_deps="mips"
1995 mips32r2_deps="mips"
1996 mipsdspr1_deps="mips"
1997 mipsdspr2_deps="mips"
1998
1999 altivec_deps="ppc"
2000 ppc4xx_deps="ppc"
2001 vsx_deps="ppc"
2002
2003 cpunop_deps="i686"
2004 x86_64_select="i686"
2005 x86_64_suggest="fast_cmov"
2006
2007 amd3dnow_deps="mmx"
2008 amd3dnowext_deps="amd3dnow"
2009 i686_deps="x86"
2010 mmx_deps="x86"
2011 mmxext_deps="mmx"
2012 sse_deps="mmxext"
2013 sse2_deps="sse"
2014 sse3_deps="sse2"
2015 ssse3_deps="sse3"
2016 sse4_deps="ssse3"
2017 sse42_deps="sse4"
2018 avx_deps="sse42"
2019 xop_deps="avx"
2020 fma3_deps="avx"
2021 fma4_deps="avx"
2022 avx2_deps="avx"
2023
2024 mmx_external_deps="yasm"
2025 mmx_inline_deps="inline_asm"
2026 mmx_suggest="mmx_external mmx_inline"
2027
2028 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2029     eval dep=\$${ext}_deps
2030     eval ${ext}_external_deps='"${dep}_external"'
2031     eval ${ext}_inline_deps='"${dep}_inline"'
2032     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2033 done
2034
2035 aligned_stack_if_any="aarch64 ppc x86"
2036 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2037 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2038 fast_unaligned_if_any="aarch64 ppc x86"
2039 simd_align_16_if_any="altivec neon sse"
2040
2041 # system capabilities
2042
2043 symver_if_any="symver_asm_label symver_gnu_asm"
2044
2045 # threading support
2046 atomics_gcc_if_any="sync_val_compare_and_swap atomic_compare_exchange"
2047 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2048 atomics_win32_if="MemoryBarrier"
2049 atomics_native_if_any="$ATOMICS_LIST"
2050 w32threads_deps="atomics_native"
2051 threads_if_any="$THREADS_LIST"
2052
2053 # subsystems
2054 dct_select="rdft"
2055 error_resilience_select="me_cmp"
2056 faandct_deps="faan fdctdsp"
2057 faanidct_deps="faan idctdsp"
2058 frame_thread_encoder_deps="encoders threads"
2059 intrax8_select="error_resilience"
2060 mdct_select="fft"
2061 rdft_select="fft"
2062 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2063 mpeg_er_select="error_resilience"
2064 mpegaudio_select="mpegaudiodsp"
2065 mpegaudiodsp_select="dct"
2066 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp videodsp"
2067 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2068
2069 # decoders / encoders
2070 aac_decoder_select="mdct sinewin"
2071 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
2072 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2073 ac3_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2074 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2075 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2076 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2077 aic_decoder_select="golomb idctdsp"
2078 alac_encoder_select="lpc"
2079 als_decoder_select="bswapdsp"
2080 amrnb_decoder_select="lsp"
2081 amrwb_decoder_select="lsp"
2082 amv_decoder_select="sp5x_decoder exif"
2083 amv_encoder_select="aandcttables mpegvideoenc"
2084 ape_decoder_select="bswapdsp llauddsp"
2085 apng_decoder_select="zlib"
2086 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2087 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2088 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2089 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2090 atrac1_decoder_select="mdct sinewin"
2091 atrac3_decoder_select="mdct"
2092 atrac3p_decoder_select="mdct sinewin"
2093 avrn_decoder_select="exif"
2094 bink_decoder_select="blockdsp hpeldsp"
2095 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2096 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2097 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2098 cllc_decoder_select="bswapdsp"
2099 comfortnoise_encoder_select="lpc"
2100 cook_decoder_select="audiodsp mdct sinewin"
2101 cscd_decoder_select="lzo"
2102 cscd_decoder_suggest="zlib"
2103 dca_decoder_select="mdct"
2104 dirac_decoder_select="dwt golomb videodsp mpegvideoenc"
2105 dnxhd_decoder_select="blockdsp idctdsp"
2106 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2107 dvvideo_decoder_select="dvprofile idctdsp"
2108 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2109 dxa_decoder_select="zlib"
2110 eac3_decoder_select="ac3_decoder"
2111 eac3_encoder_select="ac3_encoder"
2112 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2113 eatgq_decoder_select="aandcttables"
2114 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
2115 exr_decoder_select="zlib"
2116 ffv1_decoder_select="golomb rangecoder"
2117 ffv1_encoder_select="rangecoder"
2118 ffvhuff_decoder_select="huffyuv_decoder"
2119 ffvhuff_encoder_select="huffyuv_encoder"
2120 fic_decoder_select="golomb"
2121 flac_decoder_select="golomb"
2122 flac_encoder_select="bswapdsp golomb lpc"
2123 flashsv_decoder_select="zlib"
2124 flashsv_encoder_select="zlib"
2125 flashsv2_encoder_select="zlib"
2126 flashsv2_decoder_select="zlib"
2127 flv_decoder_select="h263_decoder"
2128 flv_encoder_select="h263_encoder"
2129 fourxm_decoder_select="blockdsp bswapdsp"
2130 fraps_decoder_select="bswapdsp huffman"
2131 g2m_decoder_select="blockdsp idctdsp zlib"
2132 g729_decoder_select="audiodsp"
2133 h261_decoder_select="mpeg_er mpegvideo"
2134 h261_encoder_select="aandcttables mpegvideoenc"
2135 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2136 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2137 h263i_decoder_select="h263_decoder"
2138 h263p_encoder_select="h263_encoder"
2139 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
2140 h264_decoder_suggest="error_resilience"
2141 hevc_decoder_select="bswapdsp cabac golomb videodsp"
2142 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2143 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llviddsp"
2144 iac_decoder_select="imc_decoder"
2145 imc_decoder_select="bswapdsp fft mdct sinewin"
2146 indeo3_decoder_select="hpeldsp"
2147 interplay_video_decoder_select="hpeldsp"
2148 jpegls_decoder_select="golomb mjpeg_decoder"
2149 jpegls_encoder_select="golomb"
2150 jv_decoder_select="blockdsp"
2151 lagarith_decoder_select="huffyuvdsp"
2152 ljpeg_encoder_select="aandcttables idctdsp"
2153 loco_decoder_select="golomb"
2154 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2155 metasound_decoder_select="lsp mdct sinewin"
2156 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2157 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp"
2158 mjpeg_encoder_select="aandcttables mpegvideoenc"
2159 mjpegb_decoder_select="mjpeg_decoder"
2160 mlp_decoder_select="mlp_parser"
2161 motionpixels_decoder_select="bswapdsp"
2162 mp1_decoder_select="mpegaudio"
2163 mp1float_decoder_select="mpegaudio"
2164 mp2_decoder_select="mpegaudio"
2165 mp2float_decoder_select="mpegaudio"
2166 mp3_decoder_select="mpegaudio"
2167 mp3adu_decoder_select="mpegaudio"
2168 mp3adufloat_decoder_select="mpegaudio"
2169 mp3float_decoder_select="mpegaudio"
2170 mp3on4_decoder_select="mpegaudio"
2171 mp3on4float_decoder_select="mpegaudio"
2172 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2173 mpc8_decoder_select="mpegaudiodsp"
2174 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2175 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2176 mpegvideo_decoder_select="error_resilience mpeg_er mpegvideo"
2177 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2178 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2179 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2180 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2181 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2182 mpeg4_encoder_select="h263_encoder"
2183 msmpeg4v1_decoder_select="h263_decoder"
2184 msmpeg4v2_decoder_select="h263_decoder"
2185 msmpeg4v2_encoder_select="h263_encoder"
2186 msmpeg4v3_decoder_select="h263_decoder"
2187 msmpeg4v3_encoder_select="h263_encoder"
2188 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2189 mxpeg_decoder_select="mjpeg_decoder"
2190 nellymoser_decoder_select="mdct sinewin"
2191 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2192 nuv_decoder_select="idctdsp lzo"
2193 on2avc_decoder_select="mdct"
2194 opus_decoder_deps="swresample"
2195 png_decoder_select="zlib"
2196 png_encoder_select="huffyuvencdsp zlib"
2197 prores_decoder_select="blockdsp idctdsp"
2198 prores_encoder_select="fdctdsp"
2199 qcelp_decoder_select="lsp"
2200 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2201 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2202 ra_144_decoder_select="audiodsp"
2203 ralf_decoder_select="golomb"
2204 rawvideo_decoder_select="bswapdsp"
2205 rtjpeg_decoder_select="me_cmp"
2206 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2207 rv10_encoder_select="h263_encoder"
2208 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2209 rv20_encoder_select="h263_encoder"
2210 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo videodsp"
2211 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo videodsp"
2212 shorten_decoder_select="golomb"
2213 sipr_decoder_select="lsp"
2214 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2215 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2216 sonic_decoder_select="golomb rangecoder"
2217 sonic_encoder_select="golomb rangecoder"
2218 sonic_ls_encoder_select="golomb rangecoder"
2219 sp5x_decoder_select="mjpeg_decoder"
2220 svq1_decoder_select="hpeldsp"
2221 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2222 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2223 svq3_decoder_suggest="zlib"
2224 tak_decoder_select="audiodsp"
2225 theora_decoder_select="vp3_decoder"
2226 thp_decoder_select="mjpeg_decoder"
2227 tiff_decoder_suggest="zlib lzma"
2228 tiff_encoder_suggest="zlib"
2229 truehd_decoder_select="mlp_parser"
2230 truemotion2_decoder_select="bswapdsp"
2231 truespeech_decoder_select="bswapdsp"
2232 tscc_decoder_select="zlib"
2233 twinvq_decoder_select="mdct lsp sinewin"
2234 utvideo_decoder_select="bswapdsp"
2235 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2236 vble_decoder_select="huffyuvdsp"
2237 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2238 vc1image_decoder_select="vc1_decoder"
2239 vorbis_decoder_select="mdct"
2240 vorbis_encoder_select="mdct"
2241 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2242 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
2243 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
2244 vp6a_decoder_select="vp6_decoder"
2245 vp6f_decoder_select="vp6_decoder"
2246 vp7_decoder_select="h264pred videodsp"
2247 vp8_decoder_select="h264pred videodsp"
2248 vp9_decoder_select="videodsp vp9_parser"
2249 webp_decoder_select="vp8_decoder"
2250 wmalossless_decoder_select="llauddsp"
2251 wmapro_decoder_select="mdct sinewin wma_freqs"
2252 wmav1_decoder_select="mdct sinewin wma_freqs"
2253 wmav1_encoder_select="mdct sinewin wma_freqs"
2254 wmav2_decoder_select="mdct sinewin wma_freqs"
2255 wmav2_encoder_select="mdct sinewin wma_freqs"
2256 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2257 wmv1_decoder_select="h263_decoder"
2258 wmv1_encoder_select="h263_encoder"
2259 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp"
2260 wmv2_encoder_select="h263_encoder"
2261 wmv3_decoder_select="vc1_decoder"
2262 wmv3image_decoder_select="wmv3_decoder"
2263 zerocodec_decoder_select="zlib"
2264 zlib_decoder_select="zlib"
2265 zlib_encoder_select="zlib"
2266 zmbv_decoder_select="zlib"
2267 zmbv_encoder_select="zlib"
2268
2269 # hardware accelerators
2270 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2271 dxva2_deps="dxva2api_h"
2272 vaapi_deps="va_va_h"
2273 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2274 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2275 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2276 xvmc_deps="X11_extensions_XvMClib_h"
2277
2278 h263_vaapi_hwaccel_deps="vaapi"
2279 h263_vaapi_hwaccel_select="h263_decoder"
2280 h263_vdpau_hwaccel_deps="vdpau"
2281 h263_vdpau_hwaccel_select="h263_decoder"
2282 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2283 h264_dxva2_hwaccel_deps="dxva2"
2284 h264_dxva2_hwaccel_select="h264_decoder"
2285 h264_vaapi_hwaccel_deps="vaapi"
2286 h264_vaapi_hwaccel_select="h264_decoder"
2287 h264_vda_decoder_deps="vda"
2288 h264_vda_decoder_select="h264_decoder"
2289 h264_vda_hwaccel_deps="vda"
2290 h264_vda_hwaccel_select="h264_decoder"
2291 h264_vda_old_hwaccel_deps="vda"
2292 h264_vda_old_hwaccel_select="h264_decoder"
2293 h264_vdpau_decoder_deps="vdpau"
2294 h264_vdpau_decoder_select="h264_decoder"
2295 h264_vdpau_hwaccel_deps="vdpau"
2296 h264_vdpau_hwaccel_select="h264_decoder"
2297 mpeg_vdpau_decoder_deps="vdpau"
2298 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2299 mpeg_xvmc_hwaccel_deps="xvmc"
2300 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2301 mpeg1_vdpau_decoder_deps="vdpau"
2302 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2303 mpeg1_vdpau_hwaccel_deps="vdpau"
2304 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2305 mpeg1_xvmc_hwaccel_deps="xvmc"
2306 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2307 mpeg2_crystalhd_decoder_select="crystalhd"
2308 mpeg2_dxva2_hwaccel_deps="dxva2"
2309 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2310 mpeg2_vaapi_hwaccel_deps="vaapi"
2311 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2312 mpeg2_vdpau_hwaccel_deps="vdpau"
2313 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2314 mpeg2_xvmc_hwaccel_deps="xvmc"
2315 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2316 mpeg4_crystalhd_decoder_select="crystalhd"
2317 mpeg4_vaapi_hwaccel_deps="vaapi"
2318 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2319 mpeg4_vdpau_decoder_deps="vdpau"
2320 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2321 mpeg4_vdpau_hwaccel_deps="vdpau"
2322 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2323 msmpeg4_crystalhd_decoder_select="crystalhd"
2324 vc1_crystalhd_decoder_select="crystalhd"
2325 vc1_dxva2_hwaccel_deps="dxva2"
2326 vc1_dxva2_hwaccel_select="vc1_decoder"
2327 vc1_vaapi_hwaccel_deps="vaapi"
2328 vc1_vaapi_hwaccel_select="vc1_decoder"
2329 vc1_vdpau_decoder_deps="vdpau"
2330 vc1_vdpau_decoder_select="vc1_decoder"
2331 vc1_vdpau_hwaccel_deps="vdpau"
2332 vc1_vdpau_hwaccel_select="vc1_decoder"
2333 wmv3_crystalhd_decoder_select="crystalhd"
2334 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2335 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2336 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2337 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2338
2339 # parsers
2340 h264_parser_select="h264_decoder"
2341 hevc_parser_select="hevc_decoder"
2342 mpegvideo_parser_select="mpegvideo"
2343 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2344 vc1_parser_select="mpegvideo startcode vc1_decoder"
2345
2346 # external libraries
2347 libaacplus_encoder_deps="libaacplus"
2348 libcelt_decoder_deps="libcelt"
2349 libfaac_encoder_deps="libfaac"
2350 libfaac_encoder_select="audio_frame_queue"
2351 libfdk_aac_decoder_deps="libfdk_aac"
2352 libfdk_aac_encoder_deps="libfdk_aac"
2353 libfdk_aac_encoder_select="audio_frame_queue"
2354 libgme_demuxer_deps="libgme"
2355 libgsm_decoder_deps="libgsm"
2356 libgsm_encoder_deps="libgsm"
2357 libgsm_ms_decoder_deps="libgsm"
2358 libgsm_ms_encoder_deps="libgsm"
2359 libilbc_decoder_deps="libilbc"
2360 libilbc_encoder_deps="libilbc"
2361 libmodplug_demuxer_deps="libmodplug"
2362 libmp3lame_encoder_deps="libmp3lame"
2363 libmp3lame_encoder_select="audio_frame_queue"
2364 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2365 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2366 libopencore_amrnb_encoder_select="audio_frame_queue"
2367 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2368 libopenh264_encoder_deps="libopenh264"
2369 libopenjpeg_decoder_deps="libopenjpeg"
2370 libopenjpeg_encoder_deps="libopenjpeg"
2371 libopus_decoder_deps="libopus"
2372 libopus_encoder_deps="libopus"
2373 libopus_encoder_select="audio_frame_queue"
2374 libquvi_demuxer_deps="libquvi"
2375 libschroedinger_decoder_deps="libschroedinger"
2376 libschroedinger_encoder_deps="libschroedinger"
2377 libshine_encoder_deps="libshine"
2378 libshine_encoder_select="audio_frame_queue"
2379 libspeex_decoder_deps="libspeex"
2380 libspeex_encoder_deps="libspeex"
2381 libspeex_encoder_select="audio_frame_queue"
2382 libstagefright_h264_decoder_deps="libstagefright_h264"
2383 libtheora_encoder_deps="libtheora"
2384 libtwolame_encoder_deps="libtwolame"
2385 libvo_aacenc_encoder_deps="libvo_aacenc"
2386 libvo_aacenc_encoder_select="audio_frame_queue"
2387 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2388 libvorbis_decoder_deps="libvorbis"
2389 libvorbis_encoder_deps="libvorbis"
2390 libvorbis_encoder_select="audio_frame_queue"
2391 libvpx_vp8_decoder_deps="libvpx"
2392 libvpx_vp8_encoder_deps="libvpx"
2393 libvpx_vp9_decoder_deps="libvpx"
2394 libvpx_vp9_encoder_deps="libvpx"
2395 libwavpack_encoder_deps="libwavpack"
2396 libwebp_encoder_deps="libwebp"
2397 libx264_encoder_deps="libx264"
2398 libx264rgb_encoder_deps="libx264"
2399 libx264rgb_encoder_select="libx264_encoder"
2400 libx265_encoder_deps="libx265"
2401 libxavs_encoder_deps="libxavs"
2402 libxvid_encoder_deps="libxvid"
2403 libutvideo_decoder_deps="libutvideo"
2404 libutvideo_encoder_deps="libutvideo"
2405 libzvbi_teletext_decoder_deps="libzvbi"
2406 nvenc_encoder_deps="nvenc"
2407
2408 # demuxers / muxers
2409 ac3_demuxer_select="ac3_parser"
2410 asf_demuxer_select="riffdec"
2411 asf_muxer_select="riffenc"
2412 asf_stream_muxer_select="asf_muxer"
2413 avi_demuxer_select="riffdec exif"
2414 avi_muxer_select="riffenc"
2415 avisynth_demuxer_deps="avisynth"
2416 avisynth_demuxer_select="riffdec"
2417 caf_demuxer_select="riffdec"
2418 dash_muxer_select="mp4_muxer"
2419 dirac_demuxer_select="dirac_parser"
2420 dts_demuxer_select="dca_parser"
2421 dtshd_demuxer_select="dca_parser"
2422 dv_demuxer_select="dvprofile"
2423 dv_muxer_select="dvprofile"
2424 dxa_demuxer_select="riffdec"
2425 eac3_demuxer_select="ac3_parser"
2426 f4v_muxer_select="mov_muxer"
2427 flac_demuxer_select="flac_parser"
2428 hds_muxer_select="flv_muxer"
2429 hls_muxer_select="mpegts_muxer"
2430 image2_alias_pix_demuxer_select="image2_demuxer"
2431 image2_brender_pix_demuxer_select="image2_demuxer"
2432 ipod_muxer_select="mov_muxer"
2433 ismv_muxer_select="mov_muxer"
2434 libnut_demuxer_deps="libnut"
2435 libnut_muxer_deps="libnut"
2436 matroska_audio_muxer_select="matroska_muxer"
2437 matroska_demuxer_select="riffdec"
2438 matroska_demuxer_suggest="bzlib lzo zlib"
2439 matroska_muxer_select="riffenc"
2440 mmf_muxer_select="riffenc"
2441 mov_demuxer_select="riffdec"
2442 mov_demuxer_suggest="zlib"
2443 mov_muxer_select="riffenc rtpenc_chain"
2444 mp3_demuxer_select="mpegaudio_parser"
2445 mp4_muxer_select="mov_muxer"
2446 mpegts_muxer_select="adts_muxer latm_muxer"
2447 mpegtsraw_demuxer_select="mpegts_demuxer"
2448 mxf_d10_muxer_select="mxf_muxer"
2449 nut_muxer_select="riffenc"
2450 nuv_demuxer_select="riffdec"
2451 oga_muxer_select="ogg_muxer"
2452 ogg_demuxer_select="golomb"
2453 opus_muxer_select="ogg_muxer"
2454 psp_muxer_select="mov_muxer"
2455 rtp_demuxer_select="sdp_demuxer"
2456 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2457 rtsp_demuxer_select="http_protocol rtpdec"
2458 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2459 sap_demuxer_select="sdp_demuxer"
2460 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2461 sdp_demuxer_select="rtpdec"
2462 smoothstreaming_muxer_select="ismv_muxer"
2463 spdif_muxer_select="aac_parser"
2464 spx_muxer_select="ogg_muxer"
2465 tak_demuxer_select="tak_parser"
2466 tg2_muxer_select="mov_muxer"
2467 tgp_muxer_select="mov_muxer"
2468 vobsub_demuxer_select="mpegps_demuxer"
2469 w64_demuxer_select="wav_demuxer"
2470 w64_muxer_select="wav_muxer"
2471 wav_demuxer_select="riffdec"
2472 wav_muxer_select="riffenc"
2473 webm_muxer_select="riffenc"
2474 wtv_demuxer_select="riffdec"
2475 wtv_muxer_select="riffenc"
2476 xmv_demuxer_select="riffdec"
2477 xwma_demuxer_select="riffdec"
2478
2479 # indevs / outdevs
2480 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2481 alsa_outdev_deps="alsa_asoundlib_h"
2482 avfoundation_indev_extralibs="-framework CoreVideo -framework Foundation -framework AVFoundation -framework CoreMedia -framework CoreGraphics"
2483 avfoundation_indev_select="avfoundation"
2484 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2485 caca_outdev_deps="libcaca"
2486 decklink_outdev_deps="decklink pthreads"
2487 decklink_outdev_extralibs="-lstdc++"
2488 decklink_indev_deps="decklink pthreads"
2489 decklink_indev_extralibs="-lstdc++"
2490 dshow_indev_deps="IBaseFilter"
2491 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
2492 dv1394_indev_deps="dv1394"
2493 dv1394_indev_select="dv_demuxer"
2494 fbdev_indev_deps="linux_fb_h"
2495 fbdev_outdev_deps="linux_fb_h"
2496 gdigrab_indev_deps="CreateDIBSection"
2497 gdigrab_indev_extralibs="-lgdi32"
2498 gdigrab_indev_select="bmp_decoder"
2499 iec61883_indev_deps="libiec61883"
2500 jack_indev_deps="jack_jack_h sem_timedwait"
2501 lavfi_indev_deps="avfilter"
2502 libcdio_indev_deps="libcdio"
2503 libdc1394_indev_deps="libdc1394"
2504 libv4l2_indev_deps="libv4l2"
2505 openal_indev_deps="openal"
2506 opengl_outdev_deps="opengl"
2507 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2508 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2509 pulse_indev_deps="libpulse"
2510 pulse_outdev_deps="libpulse"
2511 qtkit_indev_extralibs="-framework QTKit -framework Foundation -framework QuartzCore"
2512 qtkit_indev_select="qtkit"
2513 sdl_outdev_deps="sdl"
2514 sndio_indev_deps="sndio_h"
2515 sndio_outdev_deps="sndio_h"
2516 v4l_indev_deps="linux_videodev_h"
2517 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2518 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2519 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2520 vfwcap_indev_extralibs="-lavicap32"
2521 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2522 xv_outdev_extralibs="-lXv -lX11 -lXext"
2523 x11grab_indev_deps="x11grab"
2524 x11grab_xcb_indev_deps="libxcb"
2525
2526 # protocols
2527 bluray_protocol_deps="libbluray"
2528 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2529 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2530 ffrtmpcrypt_protocol_select="tcp_protocol"
2531 ffrtmphttp_protocol_deps="!librtmp_protocol"
2532 ffrtmphttp_protocol_select="http_protocol"
2533 ftp_protocol_select="tcp_protocol"
2534 gopher_protocol_select="network"
2535 http_protocol_select="tcp_protocol"
2536 httpproxy_protocol_select="tcp_protocol"
2537 https_protocol_select="tls_protocol"
2538 icecast_protocol_select="http_protocol"
2539 librtmp_protocol_deps="librtmp"
2540 librtmpe_protocol_deps="librtmp"
2541 librtmps_protocol_deps="librtmp"
2542 librtmpt_protocol_deps="librtmp"
2543 librtmpte_protocol_deps="librtmp"
2544 libsmbclient_protocol_deps="libsmbclient gplv3"
2545 libssh_protocol_deps="libssh"
2546 mmsh_protocol_select="http_protocol"
2547 mmst_protocol_select="network"
2548 rtmp_protocol_deps="!librtmp_protocol"
2549 rtmp_protocol_select="tcp_protocol"
2550 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2551 rtmps_protocol_deps="!librtmp_protocol"
2552 rtmps_protocol_select="tls_protocol"
2553 rtmpt_protocol_select="ffrtmphttp_protocol"
2554 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2555 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2556 rtp_protocol_select="udp_protocol"
2557 sctp_protocol_deps="struct_sctp_event_subscribe"
2558 sctp_protocol_select="network"
2559 srtp_protocol_select="rtp_protocol"
2560 tcp_protocol_select="network"
2561 tls_protocol_deps_any="openssl gnutls"
2562 tls_protocol_select="tcp_protocol"
2563 udp_protocol_select="network"
2564 udplite_protocol_select="network"
2565 unix_protocol_deps="sys_un_h"
2566 unix_protocol_select="network"
2567
2568 # filters
2569 amovie_filter_deps="avcodec avformat"
2570 aresample_filter_deps="swresample"
2571 ass_filter_deps="libass"
2572 asyncts_filter_deps="avresample"
2573 atempo_filter_deps="avcodec"
2574 atempo_filter_select="rdft"
2575 azmq_filter_deps="libzmq"
2576 blackframe_filter_deps="gpl"
2577 boxblur_filter_deps="gpl"
2578 bs2b_filter_deps="libbs2b"
2579 colormatrix_filter_deps="gpl"
2580 cropdetect_filter_deps="gpl"
2581 delogo_filter_deps="gpl"
2582 deshake_filter_select="pixelutils"
2583 drawtext_filter_deps="libfreetype"
2584 ebur128_filter_deps="gpl"
2585 flite_filter_deps="libflite"
2586 frei0r_filter_deps="frei0r dlopen"
2587 frei0r_src_filter_deps="frei0r dlopen"
2588 fspp_filter_deps="gpl"
2589 geq_filter_deps="gpl"
2590 histeq_filter_deps="gpl"
2591 hqdn3d_filter_deps="gpl"
2592 interlace_filter_deps="gpl"
2593 kerndeint_filter_deps="gpl"
2594 ladspa_filter_deps="ladspa dlopen"
2595 mcdeint_filter_deps="avcodec gpl"
2596 movie_filter_deps="avcodec avformat"
2597 mp_filter_deps="gpl avcodec swscale"
2598 mpdecimate_filter_deps="gpl"
2599 mpdecimate_filter_select="pixelutils"
2600 mptestsrc_filter_deps="gpl"
2601 negate_filter_deps="lut_filter"
2602 perspective_filter_deps="gpl"
2603 ocv_filter_deps="libopencv"
2604 owdenoise_filter_deps="gpl"
2605 pan_filter_deps="swresample"
2606 phase_filter_deps="gpl"
2607 pp_filter_deps="gpl postproc"
2608 pullup_filter_deps="gpl"
2609 removelogo_filter_deps="avcodec avformat swscale"
2610 resample_filter_deps="avresample"
2611 sab_filter_deps="gpl swscale"
2612 scale_filter_deps="swscale"
2613 select_filter_select="pixelutils"
2614 smartblur_filter_deps="gpl swscale"
2615 showspectrum_filter_deps="avcodec"
2616 showspectrum_filter_select="rdft"
2617 spp_filter_deps="gpl avcodec"
2618 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
2619 stereo3d_filter_deps="gpl"
2620 subtitles_filter_deps="avformat avcodec libass"
2621 super2xsai_filter_deps="gpl"
2622 tinterlace_filter_deps="gpl"
2623 vidstabdetect_filter_deps="libvidstab"
2624 vidstabtransform_filter_deps="libvidstab"
2625 pixfmts_super2xsai_test_deps="super2xsai_filter"
2626 tinterlace_merge_test_deps="tinterlace_filter"
2627 tinterlace_pad_test_deps="tinterlace_filter"
2628 uspp_filter_deps="gpl avcodec"
2629 zmq_filter_deps="libzmq"
2630 zoompan_filter_deps="swscale"
2631
2632 # examples
2633 avio_reading="avformat avcodec avutil"
2634 avcodec_example_deps="avcodec avutil"
2635 decoding_encoding_example_deps="avcodec avformat avutil"
2636 demuxing_decoding_example_deps="avcodec avformat avutil"
2637 extract_mvs_example_deps="avcodec avformat avutil"
2638 filter_audio_example_deps="avfilter avutil"
2639 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2640 filtering_video_example_deps="avfilter avcodec avformat avutil"
2641 metadata_example_deps="avformat avutil"
2642 muxing_example_deps="avcodec avformat avutil swscale"
2643 remuxing_example_deps="avcodec avformat avutil"
2644 resampling_audio_example_deps="avutil swresample"
2645 scaling_video_example_deps="avutil swscale"
2646 transcode_aac_example_deps="avcodec avformat swresample"
2647 transcoding_example_deps="avfilter avcodec avformat avutil"
2648
2649 # libraries, in linking order
2650 avcodec_deps="avutil"
2651 avdevice_deps="avformat avcodec avutil"
2652 avfilter_deps="avutil"
2653 avformat_deps="avcodec avutil"
2654 avresample_deps="avutil"
2655 postproc_deps="avutil gpl"
2656 swresample_deps="avutil"
2657 swscale_deps="avutil"
2658
2659 # programs
2660 ffmpeg_deps="avcodec avfilter avformat swresample"
2661 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2662                null_filter
2663                setpts_filter trim_filter"
2664 ffplay_deps="avcodec avformat swscale swresample sdl"
2665 ffplay_libs='$sdl_libs'
2666 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
2667 ffprobe_deps="avcodec avformat"
2668 ffserver_deps="avformat fork sarestart"
2669 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2670
2671 # documentation
2672 podpages_deps="perl"
2673 manpages_deps="perl pod2man"
2674 htmlpages_deps="perl"
2675 htmlpages_deps_any="makeinfo_html texi2html"
2676 txtpages_deps="perl makeinfo"
2677 doc_deps_any="manpages htmlpages podpages txtpages"
2678
2679 # default parameters
2680
2681 logfile="config.log"
2682
2683 # installation paths
2684 prefix_default="/usr/local"
2685 bindir_default='${prefix}/bin'
2686 datadir_default='${prefix}/share/ffmpeg'
2687 docdir_default='${prefix}/share/doc/ffmpeg'
2688 incdir_default='${prefix}/include'
2689 libdir_default='${prefix}/lib'
2690 mandir_default='${prefix}/share/man'
2691
2692 # toolchain
2693 ar_default="ar"
2694 cc_default="gcc"
2695 cxx_default="g++"
2696 host_cc_default="gcc"
2697 cp_f="cp -f"
2698 doxygen_default="doxygen"
2699 install="install"
2700 ln_s="ln -s -f"
2701 nm_default="nm -g"
2702 objformat="elf"
2703 pkg_config_default=pkg-config
2704 ranlib_default="ranlib"
2705 strip_default="strip"
2706 yasmexe_default="yasm"
2707 windres_default="windres"
2708
2709 # OS
2710 target_os_default=$(tolower $(uname -s))
2711 host_os=$target_os_default
2712
2713 # machine
2714 if test "$target_os_default" = aix; then
2715     arch_default=$(uname -p)
2716     strip_default="strip -X32_64"
2717 else
2718     arch_default=$(uname -m)
2719 fi
2720 cpu="generic"
2721 intrinsics="none"
2722
2723 # configurable options
2724 enable $PROGRAM_LIST
2725 enable $DOCUMENT_LIST
2726 enable $EXAMPLE_LIST
2727 enable $(filter_out avresample $LIBRARY_LIST)
2728 enable stripping
2729
2730 enable asm
2731 enable debug
2732 enable doc
2733 enable faan faandct faanidct
2734 enable optimizations
2735 enable runtime_cpudetect
2736 enable safe_bitstream_reader
2737 enable static
2738 enable swscale_alpha
2739
2740 sws_max_filter_size_default=256
2741 set_default sws_max_filter_size
2742
2743 # Enable hwaccels by default.
2744 enable dxva2 vaapi vda vdpau xvmc
2745 enable xlib
2746
2747 # build settings
2748 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2749 LIBPREF="lib"
2750 LIBSUF=".a"
2751 FULLNAME='$(NAME)$(BUILDSUF)'
2752 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2753 SLIBPREF="lib"
2754 SLIBSUF=".so"
2755 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2756 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2757 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2758 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2759 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2760 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2761
2762 asflags_filter=echo
2763 cflags_filter=echo
2764 ldflags_filter=echo
2765
2766 AS_C='-c'
2767 AS_O='-o $@'
2768 CC_C='-c'
2769 CC_E='-E -o $@'
2770 CC_O='-o $@'
2771 CXX_C='-c'
2772 CXX_O='-o $@'
2773 LD_O='-o $@'
2774 LD_LIB='-l%'
2775 LD_PATH='-L'
2776 HOSTCC_C='-c'
2777 HOSTCC_E='-E -o $@'
2778 HOSTCC_O='-o $@'
2779 HOSTLD_O='-o $@'
2780
2781 host_libs='-lm'
2782 host_cflags_filter=echo
2783 host_ldflags_filter=echo
2784
2785 target_path='$(CURDIR)'
2786
2787 # since the object filename is not given with the -MM flag, the compiler
2788 # is only able to print the basename, and we must add the path ourselves
2789 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2790 DEPFLAGS='-MM'
2791
2792 # find source path
2793 if test -f configure; then
2794     source_path=.
2795 else
2796     source_path=$(cd $(dirname "$0"); pwd)
2797     echo "$source_path" | grep -q '[[:blank:]]' &&
2798         die "Out of tree builds are impossible with whitespace in source path."
2799     test -e "$source_path/config.h" &&
2800         die "Out of tree builds are impossible with config.h in source dir."
2801 fi
2802
2803 for v in "$@"; do
2804     r=${v#*=}
2805     l=${v%"$r"}
2806     r=$(sh_quote "$r")
2807     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2808 done
2809
2810 find_things(){
2811     thing=$1
2812     pattern=$2
2813     file=$source_path/$3
2814     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2815 }
2816
2817 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2818 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2819 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2820 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2821 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2822 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2823 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2824 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2825 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2826 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2827 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2828
2829 ALL_COMPONENTS="
2830     $BSF_LIST
2831     $DECODER_LIST
2832     $DEMUXER_LIST
2833     $ENCODER_LIST
2834     $FILTER_LIST
2835     $HWACCEL_LIST
2836     $INDEV_LIST
2837     $MUXER_LIST
2838     $OUTDEV_LIST
2839     $PARSER_LIST
2840     $PROTOCOL_LIST
2841 "
2842
2843 for n in $COMPONENT_LIST; do
2844     v=$(toupper ${n%s})_LIST
2845     eval enable \$$v
2846     eval ${n}_if_any="\$$v"
2847 done
2848
2849 enable $ARCH_EXT_LIST
2850
2851 die_unknown(){
2852     echo "Unknown option \"$1\"."
2853     echo "See $0 --help for available options."
2854     exit 1
2855 }
2856
2857 print_3_columns() {
2858     cat | tr ' ' '\n' | sort | pr -r -3 -t
2859 }
2860
2861 show_list() {
2862     suffix=_$1
2863     shift
2864     echo $* | sed s/$suffix//g | print_3_columns
2865     exit 0
2866 }
2867
2868 rand_list(){
2869     IFS=', '
2870     set -- $*
2871     unset IFS
2872     for thing; do
2873         comp=${thing%:*}
2874         prob=${thing#$comp}
2875         prob=${prob#:}
2876         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2877         echo "prob ${prob:-0.5}"
2878         printf '%s\n' $comp
2879     done
2880 }
2881
2882 do_random(){
2883     action=$1
2884     shift
2885     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2886     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2887 }
2888
2889 for opt do
2890     optval="${opt#*=}"
2891     case "$opt" in
2892         --extra-ldflags=*)
2893             add_ldflags $optval
2894         ;;
2895         --extra-ldexeflags=*)
2896             add_ldexeflags $optval
2897         ;;
2898         --extra-libs=*)
2899             add_extralibs $optval
2900         ;;
2901         --disable-devices)
2902             disable $INDEV_LIST $OUTDEV_LIST
2903         ;;
2904         --enable-debug=*)
2905             debuglevel="$optval"
2906         ;;
2907         --disable-programs)
2908             disable $PROGRAM_LIST
2909         ;;
2910         --disable-everything)
2911             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2912         ;;
2913         --disable-all)
2914             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2915             disable $LIBRARY_LIST $PROGRAM_LIST doc
2916         ;;
2917         --enable-random|--disable-random)
2918             action=${opt%%-random}
2919             do_random ${action#--} $COMPONENT_LIST
2920         ;;
2921         --enable-random=*|--disable-random=*)
2922             action=${opt%%-random=*}
2923             do_random ${action#--} $optval
2924         ;;
2925         --enable-*=*|--disable-*=*)
2926             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2927             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2928             eval list=\$$(toupper $thing)_LIST
2929             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2930             list=$(filter "$name" $list)
2931             [ "$list" = "" ] && warn "Option $opt did not match anything"
2932             $action $list
2933         ;;
2934         --enable-?*|--disable-?*)
2935             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2936             if is_in $option $COMPONENT_LIST; then
2937                 test $action = disable && action=unset
2938                 eval $action \$$(toupper ${option%s})_LIST
2939             elif is_in $option $CMDLINE_SELECT; then
2940                 $action $option
2941             else
2942                 die_unknown $opt
2943             fi
2944         ;;
2945         --list-*)
2946             NAME="${opt#--list-}"
2947             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2948             NAME=${NAME%s}
2949             eval show_list $NAME \$$(toupper $NAME)_LIST
2950         ;;
2951         --help|-h) show_help
2952         ;;
2953         --fatal-warnings) enable fatal_warnings
2954         ;;
2955         *)
2956             optname="${opt%%=*}"
2957             optname="${optname#--}"
2958             optname=$(echo "$optname" | sed 's/-/_/g')
2959             if is_in $optname $CMDLINE_SET; then
2960                 eval $optname='$optval'
2961             elif is_in $optname $CMDLINE_APPEND; then
2962                 append $optname "$optval"
2963             else
2964                 die_unknown $opt
2965             fi
2966         ;;
2967     esac
2968 done
2969
2970 disabled logging && logfile=/dev/null
2971
2972 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2973 set >> $logfile
2974
2975 test -n "$cross_prefix" && enable cross_compile
2976
2977 if enabled cross_compile; then
2978     test -n "$arch" && test -n "$target_os" ||
2979         die "Must specify target arch and OS when cross-compiling"
2980 fi
2981
2982 ar_default="${cross_prefix}${ar_default}"
2983 cc_default="${cross_prefix}${cc_default}"
2984 cxx_default="${cross_prefix}${cxx_default}"
2985 nm_default="${cross_prefix}${nm_default}"
2986 pkg_config_default="${cross_prefix}${pkg_config_default}"
2987 ranlib_default="${cross_prefix}${ranlib_default}"
2988 strip_default="${cross_prefix}${strip_default}"
2989 windres_default="${cross_prefix}${windres_default}"
2990
2991 sysinclude_default="${sysroot}/usr/include"
2992
2993 test -n "$valgrind" && toolchain="valgrind-memcheck"
2994
2995 case "$toolchain" in
2996     clang-asan)
2997         cc_default="clang"
2998         add_cflags  -fsanitize=address
2999         add_ldflags -fsanitize=address
3000     ;;
3001     clang-tsan)
3002         cc_default="clang"
3003         add_cflags  -fsanitize=thread -pie
3004         add_ldflags -fsanitize=thread -pie
3005     ;;
3006     clang-usan)
3007         cc_default="clang"
3008         add_cflags  -fsanitize=undefined
3009         add_ldflags -fsanitize=undefined
3010     ;;
3011     gcc-asan)
3012         cc_default="gcc"
3013         add_cflags  -fsanitize=address
3014         add_ldflags -fsanitize=address
3015     ;;
3016     gcc-tsan)
3017         cc_default="gcc"
3018         add_cflags  -fsanitize=thread -pie -fPIC
3019         add_ldflags -fsanitize=thread -pie -fPIC
3020     ;;
3021     gcc-usan)
3022         cc_default="gcc"
3023         add_cflags  -fsanitize=undefined
3024         add_ldflags -fsanitize=undefined
3025     ;;
3026     valgrind-massif)
3027         target_exec_default=${valgrind:-"valgrind"}
3028         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"
3029     ;;
3030     valgrind-memcheck)
3031         target_exec_default=${valgrind:-"valgrind"}
3032         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3033     ;;
3034     msvc)
3035         # Check whether the current MSVC version needs the C99 converter.
3036         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3037         # support enough of C99 to build ffmpeg. Default to the new
3038         # behaviour if the regexp was unable to match anything, since this
3039         # successfully parses the version number of existing supported
3040         # versions that require the converter (MSVC 2010 and 2012).
3041         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3042         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3043             cc_default="cl"
3044         else
3045             cc_default="c99wrap cl"
3046         fi
3047         ld_default="link"
3048         nm_default="dumpbin -symbols"
3049         ar_default="lib"
3050         target_os_default="win32"
3051         # Use a relative path for TMPDIR. This makes sure all the
3052         # ffconf temp files are written with a relative path, avoiding
3053         # issues with msys/win32 path conversion for MSVC parameters
3054         # such as -Fo<file> or -out:<file>.
3055         TMPDIR=.
3056     ;;
3057     icl)
3058         cc_default="icl"
3059         ld_default="xilink"
3060         nm_default="dumpbin -symbols"
3061         ar_default="xilib"
3062         target_os_default="win32"
3063         TMPDIR=.
3064     ;;
3065     gcov)
3066         add_cflags  -fprofile-arcs -ftest-coverage
3067         add_ldflags -fprofile-arcs -ftest-coverage
3068     ;;
3069     hardened)
3070         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3071         add_cflags   -fno-strict-overflow -fstack-protector-all
3072         add_ldflags  -Wl,-z,relro -Wl,-z,now
3073     ;;
3074     ?*)
3075         die "Unknown toolchain $toolchain"
3076     ;;
3077 esac
3078
3079 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3080     target_exec target_os yasmexe
3081 enabled cross_compile || host_cc_default=$cc
3082 set_default host_cc
3083
3084 pkg_config_fail_message=""
3085 if ! $pkg_config --version >/dev/null 2>&1; then
3086     warn "$pkg_config not found, library detection may fail."
3087     pkg_config=false
3088 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3089     pkg_config_fail_message="
3090 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3091 fi
3092
3093 if test $doxygen != $doxygen_default && \
3094   ! $doxygen --version >/dev/null 2>&1; then
3095     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3096 fi
3097
3098 exesuf() {
3099     case $1 in
3100         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3101     esac
3102 }
3103
3104 EXESUF=$(exesuf $target_os)
3105 HOSTEXESUF=$(exesuf $host_os)
3106
3107 # set temporary file name
3108 : ${TMPDIR:=$TEMPDIR}
3109 : ${TMPDIR:=$TMP}
3110 : ${TMPDIR:=/tmp}
3111
3112 if [ -n "$tempprefix" ] ; then
3113     mktemp(){
3114         echo $tempprefix.${HOSTNAME}.${UID}
3115     }
3116 elif ! check_cmd mktemp -u XXXXXX; then
3117     # simple replacement for missing mktemp
3118     # NOT SAFE FOR GENERAL USE
3119     mktemp(){
3120         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3121     }
3122 fi
3123
3124 tmpfile(){
3125     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
3126         (set -C; exec > $tmp) 2>/dev/null ||
3127         die "Unable to create temporary file in $TMPDIR."
3128     append TMPFILES $tmp
3129     eval $1=$tmp
3130 }
3131
3132 trap 'rm -f -- $TMPFILES' EXIT
3133
3134 tmpfile TMPASM .asm
3135 tmpfile TMPC   .c
3136 tmpfile TMPCPP .cpp
3137 tmpfile TMPE   $EXESUF
3138 tmpfile TMPH   .h
3139 tmpfile TMPM   .m
3140 tmpfile TMPO   .o
3141 tmpfile TMPS   .S
3142 tmpfile TMPSH  .sh
3143 tmpfile TMPV   .ver
3144
3145 unset -f mktemp
3146
3147 chmod +x $TMPE
3148
3149 # make sure we can execute files in $TMPDIR
3150 cat > $TMPSH 2>> $logfile <<EOF
3151 #! /bin/sh
3152 EOF
3153 chmod +x $TMPSH >> $logfile 2>&1
3154 if ! $TMPSH >> $logfile 2>&1; then
3155     cat <<EOF
3156 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3157 variable to another directory and make sure that it is not mounted noexec.
3158 EOF
3159     die "Sanity test failed."
3160 fi
3161
3162 armasm_flags(){
3163     for flag; do
3164         case $flag in
3165             # Filter out MSVC cl.exe options from cflags that shouldn't
3166             # be passed to gas-preprocessor
3167             -M[TD]*)                                            ;;
3168             *)                  echo $flag                      ;;
3169         esac
3170    done
3171 }
3172
3173 ccc_flags(){
3174     for flag; do
3175         case $flag in
3176             -std=c99)           echo -c99                       ;;
3177             -mcpu=*)            echo -arch ${flag#*=}           ;;
3178             -mieee)             echo -ieee                      ;;
3179             -O*|-fast)          echo $flag                      ;;
3180             -fno-math-errno)    echo -assume nomath_errno       ;;
3181             -g)                 echo -g3                        ;;
3182             -Wall)              echo -msg_enable level2         ;;
3183             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3184             -Wl,*)              echo $flag                      ;;
3185             -f*|-W*)                                            ;;
3186             *)                  echo $flag                      ;;
3187         esac
3188    done
3189 }
3190
3191 cparser_flags(){
3192     for flag; do
3193         case $flag in
3194             -Wno-switch)             echo -Wno-switch-enum ;;
3195             -Wno-format-zero-length) ;;
3196             -Wdisabled-optimization) ;;
3197             -Wno-pointer-sign)       echo -Wno-other ;;
3198             *)                       echo $flag ;;
3199         esac
3200     done
3201 }
3202
3203 msvc_common_flags(){
3204     for flag; do
3205         case $flag in
3206             # In addition to specifying certain flags under the compiler
3207             # specific filters, they must be specified here as well or else the
3208             # generic catch all at the bottom will print the original flag.
3209             -Wall)                ;;
3210             -std=c99)             ;;
3211             # Common flags
3212             -fomit-frame-pointer) ;;
3213             -g)                   echo -Z7 ;;
3214             -fno-math-errno)      ;;
3215             -fno-common)          ;;
3216             -fno-signed-zeros)    ;;
3217             -fPIC)                ;;
3218             -mthumb)              ;;
3219             -march=*)             ;;
3220             -lz)                  echo zlib.lib ;;
3221             -lavifil32)           echo vfw32.lib ;;
3222             -lavicap32)           echo vfw32.lib user32.lib ;;
3223             -l*)                  echo ${flag#-l}.lib ;;
3224             -L*)                  echo -libpath:${flag#-L} ;;
3225             *)                    echo $flag ;;
3226         esac
3227     done
3228 }
3229
3230 msvc_flags(){
3231     msvc_common_flags "$@"
3232     for flag; do
3233         case $flag in
3234             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3235                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3236                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3237                                        -wd4554 \
3238                                        -wd4273 -wd4701 ;;
3239         esac
3240     done
3241 }
3242
3243 icl_flags(){
3244     msvc_common_flags "$@"
3245     for flag; do
3246         case $flag in
3247             # Despite what Intel's documentation says -Wall, which is supported
3248             # on Windows, does enable remarks so disable them here.
3249             -Wall)                echo $flag -Qdiag-disable:remark ;;
3250             -std=c99)             echo -Qstd=c99 ;;
3251             -flto)                echo -ipo ;;
3252         esac
3253     done
3254 }
3255
3256 icc_flags(){
3257     for flag; do
3258         case $flag in
3259             -flto)                echo -ipo ;;
3260             *)                    echo $flag ;;
3261         esac
3262     done
3263 }
3264
3265 pgi_flags(){
3266     for flag; do
3267         case $flag in
3268             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3269             -fomit-frame-pointer) echo -Mnoframe ;;
3270             -g)                   echo -gopt ;;
3271             *)                    echo $flag ;;
3272         esac
3273     done
3274 }
3275
3276 suncc_flags(){
3277     for flag; do
3278         case $flag in
3279             -march=*|-mcpu=*)
3280                 case "${flag#*=}" in
3281                     native)                   echo -xtarget=native       ;;
3282                     v9|niagara)               echo -xarch=sparc          ;;
3283                     ultrasparc)               echo -xarch=sparcvis       ;;
3284                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3285                     i586|pentium)             echo -xchip=pentium        ;;
3286                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3287                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3288                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3289                     pentium4*)          echo -xtarget=pentium4           ;;
3290                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3291                     *-sse3)             echo -xarch=sse3                 ;;
3292                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3293                     bonnell)                   echo -xarch=ssse3         ;;
3294                     corei7|nehalem)            echo -xtarget=nehalem     ;;
3295                     westmere)                  echo -xtarget=westmere    ;;
3296                     silvermont)                echo -xarch=sse4_2        ;;
3297                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
3298                     core-avx*|ivybridge|haswell|broadwell)
3299                                                echo -xarch=avx           ;;
3300                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
3301                     btver1)                    echo -xarch=amdsse4a      ;;
3302                     btver2|bdver*)             echo -xarch=avx           ;;
3303                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3304                     k8|opteron|athlon64|athlon-fx)
3305                                                echo -xarch=sse2a         ;;
3306                     athlon*)                   echo -xarch=pentium_proa  ;;
3307                 esac
3308                 ;;
3309             -std=c99)             echo -xc99              ;;
3310             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3311             -fPIC)                echo -KPIC -xcode=pic32 ;;
3312             -W*,*)                echo $flag              ;;
3313             -f*-*|-W*|-mimpure-text)                      ;;
3314             -shared)              echo -G                 ;;
3315             *)                    echo $flag              ;;
3316         esac
3317     done
3318 }
3319
3320 tms470_flags(){
3321     for flag; do
3322         case $flag in
3323             -march=*|-mcpu=*)
3324                 case "${flag#*=}" in
3325                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3326                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3327                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3328                     armv6*|arm11*)          echo -mv=6   ;;
3329                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3330                                             echo -mv=5e  ;;
3331                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3332                 esac
3333                 ;;
3334             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3335             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3336             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3337             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3338             -msoft-float)   echo --float_support=vfplib       ;;
3339             -O[0-3]|-mf=*)  echo $flag                        ;;
3340             -g)             echo -g -mn                       ;;
3341             -pds=*)         echo $flag                        ;;
3342             -D*|-I*)        echo $flag                        ;;
3343             --gcc|--abi=*)  echo $flag                        ;;
3344             -me)            echo $flag                        ;;
3345         esac
3346     done
3347 }
3348
3349 probe_cc(){
3350     pfx=$1
3351     _cc=$2
3352
3353     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3354     unset _ld_o _ldflags _ld_lib _ld_path
3355     unset _depflags _DEPCMD _DEPFLAGS
3356     _flags_filter=echo
3357
3358     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3359         true # no-op to avoid reading stdin in following checks
3360     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3361         _type=llvm_gcc
3362         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
3363         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
3364         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3365         _cflags_speed='-O3'
3366         _cflags_size='-Os'
3367     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3368         _type=gcc
3369         gcc_version=$($_cc --version | head -n1)
3370         gcc_basever=$($_cc -dumpversion)
3371         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3372         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3373         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3374         if ! $_cc -dumpversion | grep -q '^2\.'; then
3375             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3376         fi
3377         _cflags_speed='-O3'
3378         _cflags_size='-Os'
3379     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3380         _type=icc
3381         _ident=$($_cc --version | head -n1)
3382         _depflags='-MMD'
3383         _cflags_speed='-O3'
3384         _cflags_size='-Os'
3385         _cflags_noopt='-O1'
3386         _flags_filter=icc_flags
3387     elif $_cc -v 2>&1 | grep -q xlc; then
3388         _type=xlc
3389         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3390         _cflags_speed='-O5'
3391         _cflags_size='-O5 -qcompact'
3392     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3393         _type=ccc
3394         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3395         _DEPFLAGS='-M'
3396         _cflags_speed='-fast'
3397         _cflags_size='-O1'
3398         _flags_filter=ccc_flags
3399     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3400         test -d "$sysroot" || die "No valid sysroot specified."
3401         _type=armcc
3402         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3403         armcc_conf="$PWD/armcc.conf"
3404         $_cc --arm_linux_configure                 \
3405              --arm_linux_config_file="$armcc_conf" \
3406              --configure_sysroot="$sysroot"        \
3407              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3408              die "Error creating armcc configuration file."
3409         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3410         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3411         as_default="${cross_prefix}gcc"
3412         _depflags='-MMD'
3413         _cflags_speed='-O3'
3414         _cflags_size='-Os'
3415     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3416         _type=tms470
3417         _ident=$($_cc -version | head -n1 | tr -s ' ')
3418         _flags='--gcc --abi=eabi -me'
3419         _cc_e='-ppl -fe=$@'
3420         _cc_o='-fe=$@'
3421         _depflags='-ppa -ppd=$(@:.o=.d)'
3422         _cflags_speed='-O3 -mf=5'
3423         _cflags_size='-O3 -mf=2'
3424         _flags_filter=tms470_flags
3425     elif $_cc -v 2>&1 | grep -q clang; then
3426         _type=clang
3427         _ident=$($_cc --version | head -n1)
3428         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3429         _cflags_speed='-O3'
3430         _cflags_size='-Os'
3431     elif $_cc -V 2>&1 | grep -q Sun; then
3432         _type=suncc
3433         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3434         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3435         _DEPFLAGS='-xM1 -xc99'
3436         _ldflags='-std=c99'
3437         _cflags_speed='-O5'
3438         _cflags_size='-O5 -xspace'
3439         _flags_filter=suncc_flags
3440     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3441         _type=pathscale
3442         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3443         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3444         _cflags_speed='-O2'
3445         _cflags_size='-Os'
3446         _flags_filter='filter_out -Wdisabled-optimization'
3447     elif $_cc -v 2>&1 | grep -q Open64; then
3448         _type=open64
3449         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3450         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3451         _cflags_speed='-O2'
3452         _cflags_size='-Os'
3453         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3454     elif $_cc -V 2>&1 | grep -q Portland; then
3455         _type=pgi
3456         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3457         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3458         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3459         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3460         _cflags_noopt="-O"
3461         _flags_filter=pgi_flags
3462     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3463         _type=armasm
3464         _ident=$($_cc | head -n1)
3465         # 4509: "This form of conditional instruction is deprecated"
3466         _flags="-nologo -ignore 4509"
3467         _flags_filter=armasm_flags
3468     elif $_cc 2>&1 | grep -q Intel; then
3469         _type=icl
3470         _ident=$($cc 2>&1 | head -n1)
3471         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3472         # Not only is O3 broken on 13.x+ but it is slower on all previous
3473         # versions (tested) as well.
3474         _cflags_speed="-O2"
3475         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3476         if $_cc 2>&1 | grep -q Linker; then
3477             _ld_o='-out:$@'
3478         else
3479             _ld_o='-Fe$@'
3480         fi
3481         _cc_o='-Fo$@'
3482         _cc_e='-P'
3483         _flags_filter=icl_flags
3484         _ld_lib='lib%.a'
3485         _ld_path='-libpath:'
3486         # -Qdiag-error to make icl error when seeing certain unknown arguments
3487         _flags='-nologo -Qdiag-error:4044,10157'
3488         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
3489         # with MSVC which enables it by default.
3490         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS -fp:precise'
3491         if [ $pfx = hostcc ]; then
3492             append _cflags -Dsnprintf=_snprintf
3493         fi
3494         disable stripping
3495     elif $_cc 2>&1 | grep -q Microsoft; then
3496         _type=msvc
3497         _ident=$($cc 2>&1 | head -n1)
3498         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3499         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3500         _cflags_speed="-O2"
3501         _cflags_size="-O1"
3502         if $_cc 2>&1 | grep -q Linker; then
3503             _ld_o='-out:$@'
3504         else
3505             _ld_o='-Fe$@'
3506         fi
3507         _cc_o='-Fo$@'
3508         _cc_e='-P -Fi$@'
3509         _flags_filter=msvc_flags
3510         _ld_lib='lib%.a'
3511         _ld_path='-libpath:'
3512         _flags='-nologo'
3513         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3514         if [ $pfx = hostcc ]; then
3515             append _cflags -Dsnprintf=_snprintf
3516         fi
3517         disable stripping
3518     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3519         _type=cparser
3520         _ident=$($_cc --version | head -n1)
3521         _depflags='-MMD'
3522         _cflags_speed='-O4'
3523         _cflags_size='-O2'
3524         _flags_filter=cparser_flags
3525     fi
3526
3527     eval ${pfx}_type=\$_type
3528     eval ${pfx}_ident=\$_ident
3529 }
3530
3531 set_ccvars(){
3532     eval ${1}_C=\${_cc_c-\${${1}_C}}
3533     eval ${1}_E=\${_cc_e-\${${1}_E}}
3534     eval ${1}_O=\${_cc_o-\${${1}_O}}
3535
3536     if [ -n "$_depflags" ]; then
3537         eval ${1}_DEPFLAGS=\$_depflags
3538     else
3539         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3540         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3541         eval DEP${1}FLAGS=\$_flags
3542     fi
3543 }
3544
3545 probe_cc cc "$cc"
3546 cflags_filter=$_flags_filter
3547 cflags_speed=$_cflags_speed
3548 cflags_size=$_cflags_size
3549 cflags_noopt=$_cflags_noopt
3550 add_cflags $_flags $_cflags
3551 cc_ldflags=$_ldflags
3552 set_ccvars CC
3553
3554 probe_cc hostcc "$host_cc"
3555 host_cflags_filter=$_flags_filter
3556 add_host_cflags  $_flags $_cflags
3557 set_ccvars HOSTCC
3558
3559 test -n "$cc_type" && enable $cc_type ||
3560     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3561
3562 : ${as_default:=$cc}
3563 : ${dep_cc_default:=$cc}
3564 : ${ld_default:=$cc}
3565 : ${host_ld_default:=$host_cc}
3566 set_default ar as dep_cc ld host_ld windres
3567
3568 probe_cc as "$as"
3569 asflags_filter=$_flags_filter
3570 add_asflags $_flags $_cflags
3571 set_ccvars AS
3572
3573 probe_cc ld "$ld"
3574 ldflags_filter=$_flags_filter
3575 add_ldflags $_flags $_ldflags
3576 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3577 LD_O=${_ld_o-$LD_O}
3578 LD_LIB=${_ld_lib-$LD_LIB}
3579 LD_PATH=${_ld_path-$LD_PATH}
3580
3581 probe_cc hostld "$host_ld"
3582 host_ldflags_filter=$_flags_filter
3583 add_host_ldflags $_flags $_ldflags
3584 HOSTLD_O=${_ld_o-$HOSTLD_O}
3585
3586 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3587     probe_cc depcc "$dep_cc"
3588     CCDEP=${_DEPCMD:-$DEPCMD}
3589     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3590     DEPCCFLAGS=$_flags
3591 fi
3592
3593 if $ar 2>&1 | grep -q Microsoft; then
3594     arflags="-nologo"
3595     ar_o='-out:$@'
3596 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3597     arflags="rq"
3598     ar_o='$@'
3599 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3600     arflags='-Xany -r -c'
3601     ar_o='$@'
3602 else
3603     arflags="rc"
3604     ar_o='$@'
3605 fi
3606
3607 add_cflags $extra_cflags
3608 add_cxxflags $extra_cxxflags
3609 add_asflags $extra_cflags
3610
3611 if test -n "$sysroot"; then
3612     case "$cc_type" in
3613         gcc|llvm_gcc|clang)
3614             add_cppflags --sysroot="$sysroot"
3615             add_ldflags --sysroot="$sysroot"
3616 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
3617             add_cppflags -isysroot "$sysroot"
3618             add_ldflags -isysroot "$sysroot"
3619         ;;
3620         tms470)
3621             add_cppflags -I"$sysinclude"
3622             add_ldflags  --sysroot="$sysroot"
3623         ;;
3624     esac
3625 fi
3626
3627 if test "$cpu" = host; then
3628     enabled cross_compile &&
3629         die "--cpu=host makes no sense when cross-compiling."
3630
3631     case "$cc_type" in
3632         gcc|llvm_gcc)
3633             check_native(){
3634                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3635                 sed -n "/cc1.*$1=/{
3636                             s/.*$1=\\([^ ]*\\).*/\\1/
3637                             p
3638                             q
3639                         }" $TMPE
3640             }
3641             cpu=$(check_native -march || check_native -mcpu)
3642         ;;
3643     esac
3644
3645     test "${cpu:-host}" = host &&
3646         die "--cpu=host not supported with compiler $cc"
3647 fi
3648
3649 # Deal with common $arch aliases
3650 case "$arch" in
3651     aarch64|arm64)
3652         arch="aarch64"
3653     ;;
3654     arm*|iPad*|iPhone*)
3655         arch="arm"
3656     ;;
3657     mips*|IP*)
3658         arch="mips"
3659     ;;
3660     parisc*|hppa*)
3661         arch="parisc"
3662     ;;
3663     "Power Macintosh"|ppc*|powerpc*)
3664         arch="ppc"
3665     ;;
3666     s390|s390x)
3667         arch="s390"
3668     ;;
3669     sh4|sh)
3670         arch="sh4"
3671     ;;
3672     sun4u|sparc*)
3673         arch="sparc"
3674     ;;
3675     tilegx|tile-gx)
3676         arch="tilegx"
3677     ;;
3678     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3679         arch="x86"
3680     ;;
3681 esac
3682
3683 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3684 enable $arch
3685
3686 # Add processor-specific flags
3687 if enabled aarch64; then
3688
3689     case $cpu in
3690         armv*)
3691             cpuflags="-march=$cpu"
3692         ;;
3693         *)
3694             cpuflags="-mcpu=$cpu"
3695         ;;
3696     esac
3697
3698 elif enabled alpha; then
3699
3700     cpuflags="-mcpu=$cpu"
3701
3702 elif enabled arm; then
3703
3704     check_arm_arch() {
3705         check_cpp_condition stddef.h \
3706             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3707             $cpuflags
3708     }
3709
3710     probe_arm_arch() {
3711         if   check_arm_arch 4;        then echo armv4;
3712         elif check_arm_arch 4T;       then echo armv4t;
3713         elif check_arm_arch 5;        then echo armv5;
3714         elif check_arm_arch 5E;       then echo armv5e;
3715         elif check_arm_arch 5T;       then echo armv5t;
3716         elif check_arm_arch 5TE;      then echo armv5te;
3717         elif check_arm_arch 5TEJ;     then echo armv5te;
3718         elif check_arm_arch 6;        then echo armv6;
3719         elif check_arm_arch 6J;       then echo armv6j;
3720         elif check_arm_arch 6K;       then echo armv6k;
3721         elif check_arm_arch 6Z;       then echo armv6z;
3722         elif check_arm_arch 6ZK;      then echo armv6zk;
3723         elif check_arm_arch 6T2;      then echo armv6t2;
3724         elif check_arm_arch 7;        then echo armv7;
3725         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3726         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3727         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3728         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3729         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3730         fi
3731     }
3732
3733     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3734
3735     case $cpu in
3736         armv*)
3737             cpuflags="-march=$cpu"
3738             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3739         ;;
3740         *)
3741             cpuflags="-mcpu=$cpu"
3742             case $cpu in
3743                 cortex-a*)                               subarch=armv7a  ;;
3744                 cortex-r*)                               subarch=armv7r  ;;
3745                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3746                 arm11*)                                  subarch=armv6   ;;
3747                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3748                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3749                 *)                             subarch=$(probe_arm_arch) ;;
3750             esac
3751         ;;
3752     esac
3753
3754     case "$subarch" in
3755         armv5t*)    enable fast_clz                ;;
3756         armv[6-8]*)
3757             enable fast_clz
3758             disabled fast_unaligned || enable fast_unaligned
3759             ;;
3760     esac
3761
3762 elif enabled avr32; then
3763
3764     case $cpu in
3765         ap7[02]0[0-2])
3766             subarch="avr32_ap"
3767             cpuflags="-mpart=$cpu"
3768         ;;
3769         ap)
3770             subarch="avr32_ap"
3771             cpuflags="-march=$cpu"
3772         ;;
3773         uc3[ab]*)
3774             subarch="avr32_uc"
3775             cpuflags="-mcpu=$cpu"
3776         ;;
3777         uc)
3778             subarch="avr32_uc"
3779             cpuflags="-march=$cpu"
3780         ;;
3781     esac
3782
3783 elif enabled bfin; then
3784
3785     cpuflags="-mcpu=$cpu"
3786
3787 elif enabled mips; then
3788
3789     cpuflags="-march=$cpu"
3790
3791     case $cpu in
3792         24kc)
3793             disable mipsfpu
3794             disable mipsdspr1
3795             disable mipsdspr2
3796         ;;
3797         24kf*)
3798             disable mipsdspr1
3799             disable mipsdspr2
3800         ;;
3801         24kec|34kc|1004kc)
3802             disable mipsfpu
3803             disable mipsdspr2
3804         ;;
3805         24kef*|34kf*|1004kf*)
3806             disable mipsdspr2
3807         ;;
3808         74kc)
3809             disable mipsfpu
3810         ;;
3811     esac
3812
3813 elif enabled ppc; then
3814
3815     disable ldbrx
3816     disable vsx
3817
3818     case $(tolower $cpu) in
3819         601|ppc601|powerpc601)
3820             cpuflags="-mcpu=601"
3821             disable altivec
3822         ;;
3823         603*|ppc603*|powerpc603*)
3824             cpuflags="-mcpu=603"
3825             disable altivec
3826         ;;
3827         604*|ppc604*|powerpc604*)
3828             cpuflags="-mcpu=604"
3829             disable altivec
3830         ;;
3831         g3|75*|ppc75*|powerpc75*)
3832             cpuflags="-mcpu=750"
3833             disable altivec
3834         ;;
3835         g4|745*|ppc745*|powerpc745*)
3836             cpuflags="-mcpu=7450"
3837         ;;
3838         74*|ppc74*|powerpc74*)
3839             cpuflags="-mcpu=7400"
3840         ;;
3841         g5|970|ppc970|powerpc970)
3842             cpuflags="-mcpu=970"
3843         ;;
3844         power[3-8]*)
3845             cpuflags="-mcpu=$cpu"
3846         ;;
3847         cell)
3848             cpuflags="-mcpu=cell"
3849             enable ldbrx
3850         ;;
3851         e500mc)
3852             cpuflags="-mcpu=e500mc"
3853             disable altivec
3854         ;;
3855         e500v2)
3856             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3857             disable altivec
3858             disable dcbzl
3859         ;;
3860         e500)
3861             cpuflags="-mcpu=8540 -mhard-float"
3862             disable altivec
3863             disable dcbzl
3864         ;;
3865     esac
3866
3867 elif enabled sparc; then
3868
3869     case $cpu in
3870         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3871             cpuflags="-mcpu=$cpu"
3872         ;;
3873         ultrasparc*|niagara[234])
3874             cpuflags="-mcpu=$cpu"
3875         ;;
3876     esac
3877
3878 elif enabled x86; then
3879
3880     case $cpu in
3881         i[345]86|pentium)
3882             cpuflags="-march=$cpu"
3883             disable i686
3884             disable mmx
3885         ;;
3886         # targets that do NOT support nopl and conditional mov (cmov)
3887         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3888             cpuflags="-march=$cpu"
3889             disable i686
3890         ;;
3891         # targets that do support nopl and conditional mov (cmov)
3892         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
3893         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|amdfam10|barcelona|b[dt]ver*)
3894             cpuflags="-march=$cpu"
3895             enable i686
3896             enable fast_cmov
3897         ;;
3898         # targets that do support conditional mov but on which it's slow
3899         pentium4|pentium4m|prescott|nocona)
3900             cpuflags="-march=$cpu"
3901             enable i686
3902             disable fast_cmov
3903         ;;
3904     esac
3905
3906 fi
3907
3908 if [ "$cpu" != generic ]; then
3909     add_cflags  $cpuflags
3910     add_asflags $cpuflags
3911 fi
3912
3913 # compiler sanity check
3914 check_exec <<EOF
3915 int main(void){ return 0; }
3916 EOF
3917 if test "$?" != 0; then
3918     echo "$cc is unable to create an executable file."
3919     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3920         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3921         echo "Only do this if you know what cross compiling means."
3922     fi
3923     die "C compiler test failed."
3924 fi
3925
3926 add_cppflags -D_ISOC99_SOURCE
3927 add_cxxflags -D__STDC_CONSTANT_MACROS
3928 check_cflags -std=c99
3929 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3930 #include <stdlib.h>
3931 EOF
3932 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3933 #include <stdlib.h>
3934 EOF
3935
3936 add_host_cppflags -D_ISOC99_SOURCE
3937 check_host_cflags -std=c99
3938 check_host_cflags -Wall
3939 check_host_cflags -O3
3940
3941 check_64bit(){
3942     arch32=$1
3943     arch64=$2
3944     expr=$3
3945     check_code cc "" "int test[2*($expr) - 1]" &&
3946         subarch=$arch64 || subarch=$arch32
3947 }
3948
3949 case "$arch" in
3950     aarch64|alpha|ia64)
3951         spic=$shared
3952     ;;
3953     mips)
3954         check_64bit mips mips64 '_MIPS_SIM > 1'
3955         spic=$shared
3956     ;;
3957     parisc)
3958         check_64bit parisc parisc64 'sizeof(void *) > 4'
3959         spic=$shared
3960     ;;
3961     ppc)
3962         check_64bit ppc ppc64 'sizeof(void *) > 4'
3963         spic=$shared
3964     ;;
3965     s390)
3966         check_64bit s390 s390x 'sizeof(void *) > 4'
3967         spic=$shared
3968     ;;
3969     sparc)
3970         check_64bit sparc sparc64 'sizeof(void *) > 4'
3971         spic=$shared
3972     ;;
3973     x86)
3974         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3975         # Treat x32 as x64 for now. Note it also needs spic=$shared
3976         test "$subarch" = "x86_32" && check_cpp_condition stddef.h 'defined(__x86_64__)' &&
3977             subarch=x86_64
3978         if test "$subarch" = "x86_64"; then
3979             spic=$shared
3980         fi
3981     ;;
3982     ppc)
3983         check_cc <<EOF && subarch="ppc64"
3984         int test[(int)sizeof(char*) - 7];
3985 EOF
3986     ;;
3987 esac
3988
3989 enable $subarch
3990 enabled spic && enable_weak pic
3991
3992 # OS specific
3993 case $target_os in
3994     aix)
3995         SHFLAGS=-shared
3996         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3997         enabled shared && add_ldflags -Wl,-brtl
3998         ;;
3999     android)
4000         disable symver
4001         enable section_data_rel_ro
4002         SLIB_INSTALL_NAME='$(SLIBNAME)'
4003         SLIB_INSTALL_LINKS=
4004         # soname not set on purpose
4005         SHFLAGS=-shared
4006         ;;
4007     haiku)
4008         prefix_default="/boot/common"
4009         network_extralibs="-lnetwork"
4010         host_libs=
4011         ;;
4012     sunos)
4013         SHFLAGS='-shared -Wl,-h,$$(@F)'
4014         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
4015         network_extralibs="-lsocket -lnsl"
4016         # When using suncc to build, the Solaris linker will mark
4017         # an executable with each instruction set encountered by
4018         # the Solaris assembler.  As our libraries contain their own
4019         # guards for processor-specific code, instead suppress
4020         # generation of the HWCAPS ELF section on Solaris x86 only.
4021         enabled_all suncc x86 &&
4022             echo "hwcap_1 = OVERRIDE;" > mapfile &&
4023             add_ldflags -Wl,-M,mapfile
4024         nm_default='nm -P -g'
4025         ;;
4026     netbsd)
4027         disable symver
4028         oss_indev_extralibs="-lossaudio"
4029         oss_outdev_extralibs="-lossaudio"
4030         enabled gcc || check_ldflags -Wl,-zmuldefs
4031         ;;
4032     openbsd|bitrig)
4033         disable symver
4034         SHFLAGS='-shared'
4035         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
4036         SLIB_INSTALL_LINKS=
4037         oss_indev_extralibs="-lossaudio"
4038         oss_outdev_extralibs="-lossaudio"
4039         ;;
4040     dragonfly)
4041         disable symver
4042         ;;
4043     freebsd)
4044         ;;
4045     bsd/os)
4046         add_extralibs -lpoll -lgnugetopt
4047         strip="strip -d"
4048         ;;
4049     darwin)
4050         enabled ppc && add_asflags -force_cpusubtype_ALL
4051         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
4052         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
4053         strip="${strip} -x"
4054         add_ldflags -Wl,-dynamic,-search_paths_first
4055         SLIBSUF=".dylib"
4056         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
4057         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
4058         objformat="macho"
4059         enabled x86_64 && objformat="macho64"
4060         enabled_any pic shared ||
4061             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
4062         ;;
4063     mingw32*)
4064         if test $target_os = "mingw32ce"; then
4065             disable network
4066         else
4067             target_os=mingw32
4068         fi
4069         LIBTARGET=i386
4070         if enabled x86_64; then
4071             LIBTARGET="i386:x86-64"
4072         elif enabled arm; then
4073             LIBTARGET=arm-wince
4074         fi
4075         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4076         check_ldflags -Wl,--nxcompat
4077         check_ldflags -Wl,--dynamicbase
4078         enabled x86_32 && check_ldflags -Wl,--large-address-aware
4079         shlibdir_default="$bindir_default"
4080         SLIBPREF=""
4081         SLIBSUF=".dll"
4082         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4083         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4084         dlltool="${cross_prefix}dlltool"
4085         if check_cmd lib.exe -list; then
4086             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4087             if enabled x86_64; then
4088                 LIBTARGET=x64
4089             fi
4090         elif check_cmd $dlltool --version; then
4091             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
4092         fi
4093         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4094         SLIB_INSTALL_LINKS=
4095         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4096         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4097         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
4098         objformat="win32"
4099         ranlib=:
4100         enable dos_paths
4101         ;;
4102     win32|win64)
4103         disable symver
4104         if enabled shared; then
4105             # Link to the import library instead of the normal static library
4106             # for shared libs.
4107             LD_LIB='%.lib'
4108             # Cannot build both shared and static libs with MSVC or icl.
4109             disable static
4110         fi
4111         enabled x86_32 && check_ldflags -LARGEADDRESSAWARE
4112         shlibdir_default="$bindir_default"
4113         SLIBPREF=""
4114         SLIBSUF=".dll"
4115         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4116         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4117         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4118         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4119         SLIB_INSTALL_LINKS=
4120         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4121         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4122         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4123         objformat="win32"
4124         ranlib=:
4125         enable dos_paths
4126         ;;
4127     cygwin*)
4128         target_os=cygwin
4129         shlibdir_default="$bindir_default"
4130         SLIBPREF="cyg"
4131         SLIBSUF=".dll"
4132         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4133         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4134         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4135         SLIB_INSTALL_LINKS=
4136         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
4137         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
4138         objformat="win32"
4139         enable dos_paths
4140         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4141         ;;
4142     *-dos|freedos|opendos)
4143         network_extralibs="-lsocket"
4144         objformat="coff"
4145         enable dos_paths
4146         add_cppflags -U__STRICT_ANSI__
4147         ;;
4148     linux)
4149         enable dv1394
4150         enable section_data_rel_ro
4151         ;;
4152     irix*)
4153         target_os=irix
4154         ranlib="echo ignoring ranlib"
4155         ;;
4156     os/2*)
4157         strip="lxlite -CS"
4158         ln_s="cp -f"
4159         objformat="aout"
4160         add_cppflags -D_GNU_SOURCE
4161         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
4162         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4163         LIBSUF="_s.a"
4164         SLIBPREF=""
4165         SLIBSUF=".dll"
4166         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4167         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4168         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4169             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
4170             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4171             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4172             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4173             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
4174         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4175             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4176         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4177         enable dos_paths
4178         enable_weak os2threads
4179         ;;
4180     gnu/kfreebsd)
4181         add_cppflags -D_BSD_SOURCE
4182         ;;
4183     gnu)
4184         ;;
4185     qnx)
4186         add_cppflags -D_QNX_SOURCE
4187         network_extralibs="-lsocket"
4188         ;;
4189     symbian)
4190         SLIBSUF=".dll"
4191         enable dos_paths
4192         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4193         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4194         add_ldflags -Wl,--target1-abs,--no-undefined \
4195                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4196                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4197         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4198                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4199                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4200         ;;
4201     osf1)
4202         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4203         ;;
4204     minix)
4205         ;;
4206     plan9)
4207         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
4208                      -D_REENTRANT_SOURCE        \
4209                      -D_RESEARCH_SOURCE         \
4210                      -DFD_SETSIZE=96            \
4211                      -DHAVE_SOCK_OPTS
4212         add_compat strtod.o strtod=avpriv_strtod
4213         network_extralibs='-lbsd'
4214         exeobjs=compat/plan9/main.o
4215         disable ffserver
4216         cp_f='cp'
4217         ;;
4218     none)
4219         ;;
4220     *)
4221         die "Unknown OS '$target_os'."
4222         ;;
4223 esac
4224
4225 # determine libc flavour
4226
4227 probe_libc(){
4228     pfx=$1
4229     pfx_no_=${pfx%_}
4230     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4231     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4232         eval ${pfx}libc_type=uclibc
4233         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4234     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4235         eval ${pfx}libc_type=glibc
4236         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4237     # MinGW headers can be installed on Cygwin, so check for newlib first.
4238     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4239         eval ${pfx}libc_type=newlib
4240         add_${pfx}cppflags -U__STRICT_ANSI__
4241     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4242     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4243         eval ${pfx}libc_type=mingw64
4244         if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
4245             add_compat msvcrt/snprintf.o
4246             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
4247         fi
4248         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4249         eval test \$${pfx_no_}cc_type = "gcc" &&
4250             add_${pfx}cppflags -D__printf__=__gnu_printf__
4251     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4252          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4253         eval ${pfx}libc_type=mingw32
4254         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4255             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4256             die "ERROR: MinGW32 runtime version must be >= 3.15."
4257         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4258         eval test \$${pfx_no_}cc_type = "gcc" &&
4259             add_${pfx}cppflags -D__printf__=__gnu_printf__
4260     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4261         eval ${pfx}libc_type=msvcrt
4262         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4263         # 0x601 by default unless something else is set by the user.
4264         # This can easily lead to us detecting functions only present
4265         # in such new versions and producing binaries requiring windows 7.0.
4266         # Therefore explicitly set the default to XP unless the user has
4267         # set something else on the command line.
4268         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4269             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4270     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4271         eval ${pfx}libc_type=klibc
4272     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4273         eval ${pfx}libc_type=bionic
4274     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4275         eval ${pfx}libc_type=solaris
4276         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4277     fi
4278     check_${pfx}cc <<EOF
4279 #include <time.h>
4280 void *v = localtime_r;
4281 EOF
4282 test "$?" != 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
4283 #include <time.h>
4284 void *v = localtime_r;
4285 EOF
4286
4287 }
4288
4289 probe_libc
4290 test -n "$libc_type" && enable libc_$libc_type
4291 probe_libc host_
4292 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4293
4294 case $libc_type in
4295     bionic)
4296         add_compat strtod.o strtod=avpriv_strtod
4297         ;;
4298     msvcrt)
4299         add_compat strtod.o strtod=avpriv_strtod
4300         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4301                                      _snprintf=avpriv_snprintf  \
4302                                      vsnprintf=avpriv_vsnprintf
4303         ;;
4304 esac
4305
4306 # hacks for compiler/libc/os combinations
4307
4308 if enabled_all tms470 libc_glibc; then
4309     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4310     add_cppflags -D__USER_LABEL_PREFIX__=
4311     add_cppflags -D__builtin_memset=memset
4312     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4313     add_cflags   -pds=48    # incompatible redefinition of macro
4314 fi
4315
4316 if enabled_all ccc libc_glibc; then
4317     add_ldflags -Wl,-z,now  # calls to libots crash without this
4318 fi
4319
4320 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4321     add_cppflags '-I\$(SRC_PATH)/compat/float'
4322
4323 esc(){
4324     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4325 }
4326
4327 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
4328
4329 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4330
4331 set_default libdir
4332 : ${shlibdir_default:="$libdir"}
4333
4334 set_default $PATHS_LIST
4335 set_default nm
4336
4337 # we need to build at least one lib type
4338 if ! enabled_any static shared; then
4339     cat <<EOF
4340 At least one library type must be built.
4341 Specify --enable-static to build the static libraries or --enable-shared to
4342 build the shared libraries as well. To only build the shared libraries specify
4343 --disable-static in addition to --enable-shared.
4344 EOF
4345     exit 1;
4346 fi
4347
4348 die_license_disabled() {
4349     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4350 }
4351
4352 die_license_disabled_gpl() {
4353     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
4354 }
4355
4356 die_license_disabled gpl frei0r
4357 die_license_disabled gpl libcdio
4358 die_license_disabled gpl libsmbclient
4359 die_license_disabled gpl libutvideo
4360 die_license_disabled gpl libvidstab
4361 die_license_disabled gpl libx264
4362 die_license_disabled gpl libx265
4363 die_license_disabled gpl libxavs
4364 die_license_disabled gpl libxvid
4365 die_license_disabled gpl libzvbi
4366 die_license_disabled gpl x11grab
4367
4368 die_license_disabled nonfree libaacplus
4369 die_license_disabled nonfree libfaac
4370 die_license_disabled nonfree nvenc
4371 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
4372 enabled gpl && die_license_disabled_gpl nonfree openssl
4373
4374 die_license_disabled version3 libopencore_amrnb
4375 die_license_disabled version3 libopencore_amrwb
4376 die_license_disabled version3 libsmbclient
4377 die_license_disabled version3 libvo_aacenc
4378 die_license_disabled version3 libvo_amrwbenc
4379
4380 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4381
4382 disabled optimizations || check_cflags -fomit-frame-pointer
4383
4384 enable_weak_pic() {
4385     disabled pic && return
4386     enable pic
4387     add_cppflags -DPIC
4388     case "$target_os" in
4389     mingw*|cygwin*)
4390         ;;
4391     *)
4392         add_cflags -fPIC
4393         ;;
4394     esac
4395     add_asflags  -fPIC
4396 }
4397
4398 enabled pic && enable_weak_pic
4399
4400 check_cc <<EOF || die "Symbol mangling check failed."
4401 int ff_extern;
4402 EOF
4403 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4404 extern_prefix=${sym%%ff_extern*}
4405
4406 check_cc <<EOF && enable_weak inline_asm
4407 void foo(void) { __asm__ volatile ("" ::); }
4408 EOF
4409
4410 _restrict=
4411 for restrict_keyword in restrict __restrict__ __restrict; do
4412     check_cc <<EOF && _restrict=$restrict_keyword && break
4413 void foo(char * $restrict_keyword p);
4414 EOF
4415 done
4416
4417 check_cc <<EOF && enable pragma_deprecated
4418 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4419 EOF
4420
4421 check_cc <<EOF && enable attribute_packed
4422 struct { int x; } __attribute__((packed)) x;
4423 EOF
4424
4425 check_cc <<EOF && enable attribute_may_alias
4426 union { int x; } __attribute__((may_alias)) x;
4427 EOF
4428
4429 check_cc <<EOF || die "endian test failed"
4430 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4431 EOF
4432 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4433
4434 if  [ "$cpu" = "power7" ] || [ "$cpu" = "power8" ] ;then
4435     if ! enabled bigendian && enabled altivec ;then
4436         enable vsx
4437     fi
4438 fi
4439
4440 check_gas() {
4441     log "check_gas using '$as' as AS"
4442     # :vararg is used on aarch64, arm and ppc altivec
4443     check_as <<EOF || return 1
4444 .macro m n, y:vararg=0
4445 \n: .int \y
4446 .endm
4447 m x
4448 EOF
4449     # .altmacro is only used in arm asm
4450     ! enabled arm || check_as <<EOF || return 1
4451 .altmacro
4452 EOF
4453     enable gnu_as
4454     return 0
4455 }
4456
4457 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4458     nogas=:
4459     enabled_any arm aarch64 && nogas=die
4460     enabled_all ppc altivec && [ $target_os_default != aix ] && nogas=warn
4461     as_noop=-v
4462
4463     case $as_type in
4464         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4465         gcc)  gaspp_as_type=gas ;;
4466         *)    gaspp_as_type=$as_type ;;
4467     esac
4468
4469     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4470
4471     test "${as#*gas-preprocessor.pl}" != "$as" ||
4472     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- ${as:=$cc} $as_noop &&
4473         gas="${gas:=gas-preprocessor.pl} -arch $arch -as-type $gaspp_as_type -- ${as:=$cc}"
4474
4475     if ! check_gas ; then
4476         as=${gas:=$as}
4477         check_gas || \
4478             $nogas "GNU assembler not found, install/update gas-preprocessor"
4479     fi
4480
4481     check_as <<EOF && enable as_func
4482 .func test
4483 .endfunc
4484 EOF
4485 fi
4486
4487 check_inline_asm inline_asm_labels '"1:\n"'
4488
4489 check_inline_asm inline_asm_nonlocal_labels '"Label:\n"'
4490
4491 if enabled aarch64; then
4492     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4493     # internal assembler in clang 3.3 does not support this instruction
4494     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4495     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4496
4497     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4498
4499 elif enabled alpha; then
4500
4501     check_cflags -mieee
4502
4503 elif enabled arm; then
4504
4505     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
4506 float func(float a, float b){ return a+b; }
4507 EOF
4508
4509     enabled thumb && check_cflags -mthumb || check_cflags -marm
4510
4511     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4512         enable vfp_args
4513     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
4514         case "${cross_prefix:-$cc}" in
4515             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4516             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4517 __asm__ (".eabi_attribute 28, 1");
4518 int main(void) { return 0; }
4519 EOF
4520         esac
4521         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4522     fi
4523
4524     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4525     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4526     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4527     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4528     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4529     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4530     enabled setend  && check_insn setend  'setend be'
4531
4532     [ $target_os = linux ] || [ $target_os = android ] ||
4533         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4534             $ARCH_EXT_LIST_ARM
4535
4536     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4537
4538     check_as <<EOF && enable as_dn_directive
4539 ra .dn d0.i16
4540 .unreq ra
4541 EOF
4542
4543     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4544
4545 elif enabled mips; then
4546
4547     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4548     enabled mips32r2  && add_cflags "-mips32r2" && add_asflags "-mips32r2" &&
4549      check_inline_asm mips32r2  '"rotr $t0, $t1, 1"'
4550     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
4551      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
4552     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
4553      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
4554     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
4555      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
4556
4557 elif enabled parisc; then
4558
4559     if enabled gcc; then
4560         case $($cc -dumpversion) in
4561             4.[3-9].*) check_cflags -fno-optimize-sibling-calls ;;
4562         esac
4563     fi
4564
4565 elif enabled ppc; then
4566
4567     enable local_aligned_8 local_aligned_16 local_aligned_32
4568
4569     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4570     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4571     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4572     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4573
4574     # AltiVec flags: The FSF version of GCC differs from the Apple version
4575     if enabled altivec; then
4576         check_cflags -maltivec -mabi=altivec &&
4577         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4578         check_cflags -faltivec
4579
4580         # check if our compiler supports Motorola AltiVec C API
4581         check_cc <<EOF || disable altivec
4582 $inc_altivec_h
4583 int main(void) {
4584     vector signed int v1 = (vector signed int) { 0 };
4585     vector signed int v2 = (vector signed int) { 1 };
4586     v1 = vec_add(v1, v2);
4587     return 0;
4588 }
4589 EOF
4590
4591         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4592     fi
4593
4594     if enabled vsx; then
4595         check_cflags -mvsx
4596     fi
4597 elif enabled x86; then
4598
4599     check_builtin rdtsc    intrin.h   "__rdtsc()"
4600     check_builtin mm_empty mmintrin.h "_mm_empty()"
4601
4602     enable local_aligned_8 local_aligned_16 local_aligned_32
4603
4604     # check whether EBP is available on x86
4605     # As 'i' is stored on the stack, this program will crash
4606     # if the base pointer is used to access it because the
4607     # base pointer is cleared in the inline assembly code.
4608     check_exec_crash <<EOF && enable ebp_available
4609 volatile int i=0;
4610 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4611 return i;
4612 EOF
4613
4614     # check whether EBX is available on x86
4615     check_inline_asm ebx_available '""::"b"(0)' &&
4616         check_inline_asm ebx_available '"":::"%ebx"'
4617
4618     # check whether xmm clobbers are supported
4619     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4620
4621     check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test, %eax"' ||
4622         check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test(%rip), %eax"'
4623
4624     # check whether binutils is new enough to compile SSSE3/MMXEXT
4625     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4626     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4627
4628     if ! disabled_any asm mmx yasm; then
4629         if check_cmd $yasmexe --version; then
4630             enabled x86_64 && yasm_extra="-m amd64"
4631             yasm_debug="-g dwarf2"
4632         elif check_cmd nasm -v; then
4633             yasmexe=nasm
4634             yasm_debug="-g -F dwarf"
4635             if enabled x86_64; then
4636                 case "$objformat" in
4637                     elf)   objformat=elf64 ;;
4638                     win32) objformat=win64 ;;
4639                 esac
4640             fi
4641         fi
4642
4643         YASMFLAGS="-f $objformat $yasm_extra"
4644         enabled pic               && append YASMFLAGS "-DPIC"
4645         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4646         case "$objformat" in
4647             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4648         esac
4649
4650         check_yasm "movbe ecx, [5]" && enable yasm ||
4651             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4652         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4653         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4654         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4655         check_yasm "CPU amdnop" || disable cpunop
4656     fi
4657
4658     case "$cpu" in
4659         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4660             disable fast_clz
4661         ;;
4662     esac
4663
4664 fi
4665
4666 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4667
4668 check_ldflags -Wl,--as-needed
4669 check_ldflags -Wl,-z,noexecstack
4670
4671 if check_func dlopen; then
4672     ldl=
4673 elif check_func dlopen -ldl; then
4674     ldl=-ldl
4675 fi
4676
4677 frei0r_filter_extralibs='$ldl'
4678 frei0r_src_filter_extralibs='$ldl'
4679 ladspa_filter_extralibs='$ldl'
4680 nvenc_encoder_extralibs='$ldl'
4681
4682 if ! disabled network; then
4683     check_func getaddrinfo $network_extralibs
4684     check_func getservbyport $network_extralibs
4685     check_func inet_aton $network_extralibs
4686
4687     check_type netdb.h "struct addrinfo"
4688     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4689     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4690     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4691     check_type poll.h "struct pollfd"
4692     check_type netinet/sctp.h "struct sctp_event_subscribe"
4693     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4694     check_type netinet/in.h "struct sockaddr_in6"
4695     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4696     check_type "sys/types.h sys/socket.h" socklen_t
4697
4698     # Prefer arpa/inet.h over winsock2
4699     if check_header arpa/inet.h ; then
4700         check_func closesocket
4701     elif check_header winsock2.h ; then
4702         check_func_headers winsock2.h closesocket -lws2 &&
4703             network_extralibs="-lws2" ||
4704         { check_func_headers winsock2.h closesocket -lws2_32 &&
4705             network_extralibs="-lws2_32"; } || disable winsock2_h network
4706         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4707
4708         check_type ws2tcpip.h socklen_t
4709         check_type ws2tcpip.h "struct addrinfo"
4710         check_type ws2tcpip.h "struct group_source_req"
4711         check_type ws2tcpip.h "struct ip_mreq_source"
4712         check_type ws2tcpip.h "struct ipv6_mreq"
4713         check_type winsock2.h "struct pollfd"
4714         check_struct winsock2.h "struct sockaddr" sa_len
4715         check_type ws2tcpip.h "struct sockaddr_in6"
4716         check_type ws2tcpip.h "struct sockaddr_storage"
4717     else
4718         disable network
4719     fi
4720 fi
4721
4722 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4723 check_builtin atomic_compare_exchange "" "int *ptr, *oldval; int newval; __atomic_compare_exchange_n(ptr, oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)"
4724 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4725 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4726 check_builtin sarestart signal.h "SA_RESTART"
4727 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4728
4729 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4730 check_func  ${malloc_prefix}memalign            && enable memalign
4731 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4732
4733 check_func  access
4734 check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4735 check_func  fcntl
4736 check_func  fork
4737 check_func  gethrtime
4738 check_func  getopt
4739 check_func  getrusage
4740 check_func  gettimeofday
4741 check_func  gmtime_r
4742 check_func  isatty
4743 check_func  localtime_r
4744 check_func  mach_absolute_time
4745 check_func  mkstemp
4746 check_func  mmap
4747 check_func  mprotect
4748 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4749 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4750 check_func  sched_getaffinity
4751 check_func  setrlimit
4752 check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE
4753 check_func  strerror_r
4754 check_func  sysconf
4755 check_func  sysctl
4756 check_func  usleep
4757
4758 check_func_headers conio.h kbhit
4759 check_func_headers io.h setmode
4760 check_func_headers lzo/lzo1x.h lzo1x_999_compress
4761 check_func_headers stdlib.h getenv
4762
4763 check_func_headers windows.h CoTaskMemFree -lole32
4764 check_func_headers windows.h GetProcessAffinityMask
4765 check_func_headers windows.h GetProcessTimes
4766 check_func_headers windows.h GetSystemTimeAsFileTime
4767 check_func_headers windows.h MapViewOfFile
4768 check_func_headers windows.h PeekNamedPipe
4769 check_func_headers windows.h SetConsoleTextAttribute
4770 check_func_headers windows.h Sleep
4771 check_func_headers windows.h VirtualAlloc
4772 check_struct windows.h "CONDITION_VARIABLE" Ptr
4773 check_func_headers glob.h glob
4774 enabled xlib &&
4775     check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
4776
4777 check_header cl/cl.h
4778 check_header direct.h
4779 check_header dlfcn.h
4780 check_header dxva.h
4781 check_header dxva2api.h -D_WIN32_WINNT=0x0600
4782 check_header io.h
4783 check_header libcrystalhd/libcrystalhd_if.h
4784 check_header mach/mach_time.h
4785 check_header malloc.h
4786 check_header net/udplite.h
4787 check_header poll.h
4788 check_header sys/mman.h
4789 check_header sys/param.h
4790 check_header sys/resource.h
4791 check_header sys/select.h
4792 check_header sys/time.h
4793 check_header sys/un.h
4794 check_header termios.h
4795 check_header unistd.h
4796 check_header vdpau/vdpau.h
4797 check_header vdpau/vdpau_x11.h
4798 check_header VideoDecodeAcceleration/VDADecoder.h
4799 check_header windows.h
4800 check_header X11/extensions/XvMClib.h
4801 check_header asm/types.h
4802
4803 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4804 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4805 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4806
4807 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4808
4809 if ! disabled w32threads && ! enabled pthreads; then
4810     check_func_headers "windows.h process.h" _beginthreadex &&
4811         enable w32threads || disable w32threads
4812 fi
4813
4814 # check for some common methods of building with pthread support
4815 # do this before the optional library checks as some of them require pthreads
4816 if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
4817     enable pthreads
4818     if check_func pthread_join -pthread && check_func pthread_create -pthread; then
4819         add_cflags -pthread
4820         add_extralibs -pthread
4821     elif check_func pthread_join -pthreads && check_func pthread_create -pthreads; then
4822         add_cflags -pthreads
4823         add_extralibs -pthreads
4824     elif check_func pthread_join -ldl -pthread && check_func pthread_create -ldl -pthread; then
4825         add_cflags -ldl -pthread
4826         add_extralibs -ldl -pthread
4827     elif check_func pthread_join -lpthreadGC2 && check_func pthread_create -lpthreadGC2; then
4828         add_extralibs -lpthreadGC2
4829     elif check_lib pthread.h pthread_join -lpthread && check_lib pthread.h pthread_create -lpthread; then
4830         :
4831     elif ! check_func pthread_join && ! check_func pthread_create; then
4832         disable pthreads
4833     fi
4834     check_code cc "pthread.h" "static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER" || disable pthreads
4835 fi
4836
4837
4838 if enabled pthreads; then
4839   check_func pthread_cancel
4840 fi
4841
4842 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4843 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4844 disabled  lzma || check_lib2  lzma.h lzma_version_number -llzma || disable lzma
4845
4846 check_lib math.h sin -lm && LIBM="-lm"
4847 disabled crystalhd || check_lib libcrystalhd/libcrystalhd_if.h DtsCrystalHDVersion -lcrystalhd || disable crystalhd
4848
4849 atan2f_args=2
4850 ldexpf_args=2
4851 powf_args=2
4852
4853 for func in $MATH_FUNCS; do
4854     eval check_mathfunc $func \${${func}_args:-1}
4855 done
4856
4857 # these are off by default, so fail if requested and not available
4858 enabled avfoundation_indev && { check_header_oc AVFoundation/AVFoundation.h || disable avfoundation_indev; }