configure: use ar and ranlib in deterministic mode if available
[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     dev_bktr_ioctl_bt848_h
1646     dev_bktr_ioctl_meteor_h
1647     dev_ic_bt8xx_h
1648     dev_video_bktr_ioctl_bt848_h
1649     dev_video_meteor_ioctl_meteor_h
1650     direct_h
1651     dlfcn_h
1652     dxva_h
1653     ES2_gl_h
1654     gsm_h
1655     io_h
1656     mach_mach_time_h
1657     machine_ioctl_bt848_h
1658     machine_ioctl_meteor_h
1659     malloc_h
1660     openjpeg_1_5_openjpeg_h
1661     OpenGL_gl3_h
1662     poll_h
1663     sndio_h
1664     soundcard_h
1665     sys_mman_h
1666     sys_param_h
1667     sys_resource_h
1668     sys_select_h
1669     sys_soundcard_h
1670     sys_time_h
1671     sys_un_h
1672     sys_videoio_h
1673     termios_h
1674     udplite_h
1675     unistd_h
1676     windows_h
1677     winsock2_h
1678 "
1679
1680 INTRINSICS_LIST="
1681     intrinsics_neon
1682 "
1683
1684 MATH_FUNCS="
1685     atanf
1686     atan2f
1687     cbrt
1688     cbrtf
1689     cosf
1690     exp2
1691     exp2f
1692     expf
1693     isinf
1694     isnan
1695     ldexpf
1696     llrint
1697     llrintf
1698     log2
1699     log2f
1700     log10f
1701     lrint
1702     lrintf
1703     powf
1704     rint
1705     round
1706     roundf
1707     sinf
1708     trunc
1709     truncf
1710 "
1711
1712 SYSTEM_FUNCS="
1713     access
1714     aligned_malloc
1715     clock_gettime
1716     closesocket
1717     CommandLineToArgvW
1718     CoTaskMemFree
1719     CryptGenRandom
1720     dlopen
1721     fcntl
1722     flt_lim
1723     fork
1724     getaddrinfo
1725     gethrtime
1726     getopt
1727     GetProcessAffinityMask
1728     GetProcessMemoryInfo
1729     GetProcessTimes
1730     getrusage
1731     getservbyport
1732     GetSystemTimeAsFileTime
1733     gettimeofday
1734     glob
1735     glXGetProcAddress
1736     gmtime_r
1737     inet_aton
1738     isatty
1739     jack_port_get_latency_range
1740     kbhit
1741     localtime_r
1742     lzo1x_999_compress
1743     mach_absolute_time
1744     MapViewOfFile
1745     memalign
1746     mkstemp
1747     mmap
1748     mprotect
1749     nanosleep
1750     PeekNamedPipe
1751     posix_memalign
1752     pthread_cancel
1753     sched_getaffinity
1754     SetConsoleTextAttribute
1755     setmode
1756     setrlimit
1757     Sleep
1758     strerror_r
1759     sysconf
1760     sysctl
1761     usleep
1762     VirtualAlloc
1763     wglGetProcAddress
1764 "
1765
1766 TOOLCHAIN_FEATURES="
1767     as_dn_directive
1768     as_func
1769     asm_mod_q
1770     attribute_may_alias
1771     attribute_packed
1772     ebp_available
1773     ebx_available
1774     gnu_as
1775     gnu_windres
1776     ibm_asm
1777     inline_asm_labels
1778     inline_asm_nonlocal_labels
1779     inline_asm_direct_symbol_refs
1780     pragma_deprecated
1781     rsync_contimeout
1782     symver_asm_label
1783     symver_gnu_asm
1784     vfp_args
1785     xform_asm
1786     xmm_clobbers
1787 "
1788
1789 TYPES_LIST="
1790     CONDITION_VARIABLE_Ptr
1791     socklen_t
1792     struct_addrinfo
1793     struct_group_source_req
1794     struct_ip_mreq_source
1795     struct_ipv6_mreq
1796     struct_pollfd
1797     struct_rusage_ru_maxrss
1798     struct_sctp_event_subscribe
1799     struct_sockaddr_in6
1800     struct_sockaddr_sa_len
1801     struct_sockaddr_storage
1802     struct_stat_st_mtim_tv_nsec
1803     struct_v4l2_frmivalenum_discrete
1804 "
1805
1806 HAVE_LIST="
1807     $ARCH_EXT_LIST
1808     $(add_suffix _external $ARCH_EXT_LIST)
1809     $(add_suffix _inline   $ARCH_EXT_LIST)
1810     $ARCH_FEATURES
1811     $ATOMICS_LIST
1812     $BUILTIN_LIST
1813     $HAVE_LIST_CMDLINE
1814     $HAVE_LIST_PUB
1815     $HEADERS_LIST
1816     $INTRINSICS_LIST
1817     $MATH_FUNCS
1818     $SYSTEM_FUNCS
1819     $THREADS_LIST
1820     $TOOLCHAIN_FEATURES
1821     $TYPES_LIST
1822     atomics_native
1823     dos_paths
1824     dxva2api_cobj
1825     dxva2_lib
1826     libc_msvcrt
1827     libdc1394_1
1828     libdc1394_2
1829     makeinfo
1830     makeinfo_html
1831     perl
1832     pod2man
1833     sdl
1834     section_data_rel_ro
1835     texi2html
1836     threads
1837     vdpau_x11
1838     xlib
1839 "
1840
1841 # options emitted with CONFIG_ prefix but not available on the command line
1842 CONFIG_EXTRA="
1843     aandcttables
1844     ac3dsp
1845     audio_frame_queue
1846     audiodsp
1847     blockdsp
1848     bswapdsp
1849     cabac
1850     dvprofile
1851     exif
1852     faandct
1853     faanidct
1854     fdctdsp
1855     frame_thread_encoder
1856     gcrypt
1857     golomb
1858     gplv3
1859     h263dsp
1860     h264chroma
1861     h264dsp
1862     h264pred
1863     h264qpel
1864     hpeldsp
1865     huffman
1866     huffyuvdsp
1867     huffyuvencdsp
1868     idctdsp
1869     iirfilter
1870     intrax8
1871     lgplv3
1872     llauddsp
1873     llviddsp
1874     lpc
1875     me_cmp
1876     mpeg_er
1877     mpegaudio
1878     mpegaudiodsp
1879     mpegvideo
1880     mpegvideoenc
1881     nettle
1882     pixblockdsp
1883     qpeldsp
1884     rangecoder
1885     riffdec
1886     riffenc
1887     rtpdec
1888     rtpenc_chain
1889     sinewin
1890     startcode
1891     tpeldsp
1892     videodsp
1893     vp3dsp
1894     wma_freqs
1895 "
1896
1897 CMDLINE_SELECT="
1898     $ARCH_EXT_LIST
1899     $CONFIG_LIST
1900     $HAVE_LIST_CMDLINE
1901     $THREADS_LIST
1902     asm
1903     cross_compile
1904     debug
1905     extra_warnings
1906     logging
1907     lto
1908     optimizations
1909     rpath
1910     stripping
1911 "
1912
1913 PATHS_LIST="
1914     bindir
1915     datadir
1916     docdir
1917     incdir
1918     libdir
1919     mandir
1920     prefix
1921     shlibdir
1922 "
1923
1924 CMDLINE_SET="
1925     $PATHS_LIST
1926     ar
1927     arch
1928     as
1929     assert_level
1930     build_suffix
1931     cc
1932     cpu
1933     cross_prefix
1934     cxx
1935     dep_cc
1936     doxygen
1937     extra_version
1938     gas
1939     host_cc
1940     host_cflags
1941     host_ld
1942     host_ldflags
1943     host_libs
1944     host_os
1945     install
1946     ld
1947     logfile
1948     malloc_prefix
1949     nm
1950     optflags
1951     pkg_config
1952     pkg_config_flags
1953     progs_suffix
1954     random_seed
1955     ranlib
1956     samples
1957     strip
1958     sws_max_filter_size
1959     sysinclude
1960     sysroot
1961     target_exec
1962     target_os
1963     target_path
1964     target_samples
1965     tempprefix
1966     toolchain
1967     valgrind
1968     yasmexe
1969 "
1970
1971 CMDLINE_APPEND="
1972     extra_cflags
1973     extra_cxxflags
1974     host_cppflags
1975 "
1976
1977 # code dependency declarations
1978
1979 # architecture extensions
1980
1981 armv5te_deps="arm"
1982 armv6_deps="arm"
1983 armv6t2_deps="arm"
1984 armv8_deps="aarch64"
1985 neon_deps_any="aarch64 arm"
1986 intrinsics_neon_deps="neon"
1987 vfp_deps_any="aarch64 arm"
1988 vfpv3_deps="vfp"
1989 setend_deps="arm"
1990
1991 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1992
1993 mipsfpu_deps="mips"
1994 mips32r2_deps="mips"
1995 mipsdspr1_deps="mips"
1996 mipsdspr2_deps="mips"
1997
1998 altivec_deps="ppc"
1999 ppc4xx_deps="ppc"
2000 vsx_deps="ppc"
2001
2002 cpunop_deps="i686"
2003 x86_64_select="i686"
2004 x86_64_suggest="fast_cmov"
2005
2006 amd3dnow_deps="mmx"
2007 amd3dnowext_deps="amd3dnow"
2008 i686_deps="x86"
2009 mmx_deps="x86"
2010 mmxext_deps="mmx"
2011 sse_deps="mmxext"
2012 sse2_deps="sse"
2013 sse3_deps="sse2"
2014 ssse3_deps="sse3"
2015 sse4_deps="ssse3"
2016 sse42_deps="sse4"
2017 avx_deps="sse42"
2018 xop_deps="avx"
2019 fma3_deps="avx"
2020 fma4_deps="avx"
2021 avx2_deps="avx"
2022
2023 mmx_external_deps="yasm"
2024 mmx_inline_deps="inline_asm"
2025 mmx_suggest="mmx_external mmx_inline"
2026
2027 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
2028     eval dep=\$${ext}_deps
2029     eval ${ext}_external_deps='"${dep}_external"'
2030     eval ${ext}_inline_deps='"${dep}_inline"'
2031     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
2032 done
2033
2034 aligned_stack_if_any="aarch64 ppc x86"
2035 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
2036 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
2037 fast_unaligned_if_any="aarch64 ppc x86"
2038 simd_align_16_if_any="altivec neon sse"
2039
2040 # system capabilities
2041
2042 symver_if_any="symver_asm_label symver_gnu_asm"
2043
2044 # threading support
2045 atomics_gcc_if_any="sync_val_compare_and_swap atomic_compare_exchange"
2046 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
2047 atomics_win32_if="MemoryBarrier"
2048 atomics_native_if_any="$ATOMICS_LIST"
2049 w32threads_deps="atomics_native"
2050 threads_if_any="$THREADS_LIST"
2051
2052 # subsystems
2053 dct_select="rdft"
2054 error_resilience_select="me_cmp"
2055 faandct_deps="faan fdctdsp"
2056 faanidct_deps="faan idctdsp"
2057 frame_thread_encoder_deps="encoders threads"
2058 intrax8_select="error_resilience"
2059 mdct_select="fft"
2060 rdft_select="fft"
2061 me_cmp_select="fdctdsp idctdsp pixblockdsp"
2062 mpeg_er_select="error_resilience"
2063 mpegaudio_select="mpegaudiodsp"
2064 mpegaudiodsp_select="dct"
2065 mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp videodsp"
2066 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
2067
2068 # decoders / encoders
2069 aac_decoder_select="mdct sinewin"
2070 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
2071 aac_latm_decoder_select="aac_decoder aac_latm_parser"
2072 ac3_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2073 ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp mdct"
2074 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
2075 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
2076 aic_decoder_select="golomb idctdsp"
2077 alac_encoder_select="lpc"
2078 als_decoder_select="bswapdsp"
2079 amrnb_decoder_select="lsp"
2080 amrwb_decoder_select="lsp"
2081 amv_decoder_select="sp5x_decoder exif"
2082 amv_encoder_select="aandcttables mpegvideoenc"
2083 ape_decoder_select="bswapdsp llauddsp"
2084 apng_decoder_select="zlib"
2085 asv1_decoder_select="blockdsp bswapdsp idctdsp"
2086 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
2087 asv2_decoder_select="blockdsp bswapdsp idctdsp"
2088 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
2089 atrac1_decoder_select="mdct sinewin"
2090 atrac3_decoder_select="mdct"
2091 atrac3p_decoder_select="mdct sinewin"
2092 avrn_decoder_select="exif"
2093 bink_decoder_select="blockdsp hpeldsp"
2094 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
2095 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
2096 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
2097 cllc_decoder_select="bswapdsp"
2098 comfortnoise_encoder_select="lpc"
2099 cook_decoder_select="audiodsp mdct sinewin"
2100 cscd_decoder_select="lzo"
2101 cscd_decoder_suggest="zlib"
2102 dca_decoder_select="mdct"
2103 dirac_decoder_select="dwt golomb videodsp mpegvideoenc"
2104 dnxhd_decoder_select="blockdsp idctdsp"
2105 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2106 dvvideo_decoder_select="dvprofile idctdsp"
2107 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2108 dxa_decoder_select="zlib"
2109 eac3_decoder_select="ac3_decoder"
2110 eac3_encoder_select="ac3_encoder"
2111 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2112 eatgq_decoder_select="aandcttables"
2113 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
2114 exr_decoder_select="zlib"
2115 ffv1_decoder_select="golomb rangecoder"
2116 ffv1_encoder_select="rangecoder"
2117 ffvhuff_decoder_select="huffyuv_decoder"
2118 ffvhuff_encoder_select="huffyuv_encoder"
2119 fic_decoder_select="golomb"
2120 flac_decoder_select="golomb"
2121 flac_encoder_select="bswapdsp golomb lpc"
2122 flashsv_decoder_select="zlib"
2123 flashsv_encoder_select="zlib"
2124 flashsv2_encoder_select="zlib"
2125 flashsv2_decoder_select="zlib"
2126 flv_decoder_select="h263_decoder"
2127 flv_encoder_select="h263_encoder"
2128 fourxm_decoder_select="blockdsp bswapdsp"
2129 fraps_decoder_select="bswapdsp huffman"
2130 g2m_decoder_select="blockdsp idctdsp zlib"
2131 g729_decoder_select="audiodsp"
2132 h261_decoder_select="mpeg_er mpegvideo"
2133 h261_encoder_select="aandcttables mpegvideoenc"
2134 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2135 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2136 h263i_decoder_select="h263_decoder"
2137 h263p_encoder_select="h263_encoder"
2138 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
2139 h264_decoder_suggest="error_resilience"
2140 hevc_decoder_select="bswapdsp cabac golomb videodsp"
2141 huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
2142 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llviddsp"
2143 iac_decoder_select="imc_decoder"
2144 imc_decoder_select="bswapdsp fft mdct sinewin"
2145 indeo3_decoder_select="hpeldsp"
2146 interplay_video_decoder_select="hpeldsp"
2147 jpegls_decoder_select="golomb mjpeg_decoder"
2148 jpegls_encoder_select="golomb"
2149 jv_decoder_select="blockdsp"
2150 lagarith_decoder_select="huffyuvdsp"
2151 ljpeg_encoder_select="aandcttables idctdsp"
2152 loco_decoder_select="golomb"
2153 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2154 metasound_decoder_select="lsp mdct sinewin"
2155 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2156 mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp"
2157 mjpeg_encoder_select="aandcttables mpegvideoenc"
2158 mjpegb_decoder_select="mjpeg_decoder"
2159 mlp_decoder_select="mlp_parser"
2160 motionpixels_decoder_select="bswapdsp"
2161 mp1_decoder_select="mpegaudio"
2162 mp1float_decoder_select="mpegaudio"
2163 mp2_decoder_select="mpegaudio"
2164 mp2float_decoder_select="mpegaudio"
2165 mp3_decoder_select="mpegaudio"
2166 mp3adu_decoder_select="mpegaudio"
2167 mp3adufloat_decoder_select="mpegaudio"
2168 mp3float_decoder_select="mpegaudio"
2169 mp3on4_decoder_select="mpegaudio"
2170 mp3on4float_decoder_select="mpegaudio"
2171 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2172 mpc8_decoder_select="mpegaudiodsp"
2173 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2174 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2175 mpegvideo_decoder_select="error_resilience mpeg_er mpegvideo"
2176 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2177 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2178 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2179 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2180 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2181 mpeg4_encoder_select="h263_encoder"
2182 msmpeg4v1_decoder_select="h263_decoder"
2183 msmpeg4v2_decoder_select="h263_decoder"
2184 msmpeg4v2_encoder_select="h263_encoder"
2185 msmpeg4v3_decoder_select="h263_decoder"
2186 msmpeg4v3_encoder_select="h263_encoder"
2187 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2188 mxpeg_decoder_select="mjpeg_decoder"
2189 nellymoser_decoder_select="mdct sinewin"
2190 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2191 nuv_decoder_select="idctdsp lzo"
2192 on2avc_decoder_select="mdct"
2193 opus_decoder_deps="swresample"
2194 png_decoder_select="zlib"
2195 png_encoder_select="huffyuvencdsp zlib"
2196 prores_decoder_select="blockdsp idctdsp"
2197 prores_encoder_select="fdctdsp"
2198 qcelp_decoder_select="lsp"
2199 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2200 ra_144_encoder_select="audio_frame_queue lpc audiodsp"
2201 ra_144_decoder_select="audiodsp"
2202 ralf_decoder_select="golomb"
2203 rawvideo_decoder_select="bswapdsp"
2204 rtjpeg_decoder_select="me_cmp"
2205 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2206 rv10_encoder_select="h263_encoder"
2207 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2208 rv20_encoder_select="h263_encoder"
2209 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo videodsp"
2210 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo videodsp"
2211 shorten_decoder_select="golomb"
2212 sipr_decoder_select="lsp"
2213 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
2214 snow_encoder_select="aandcttables dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder"
2215 sonic_decoder_select="golomb rangecoder"
2216 sonic_encoder_select="golomb rangecoder"
2217 sonic_ls_encoder_select="golomb rangecoder"
2218 sp5x_decoder_select="mjpeg_decoder"
2219 svq1_decoder_select="hpeldsp"
2220 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2221 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2222 svq3_decoder_suggest="zlib"
2223 tak_decoder_select="audiodsp"
2224 theora_decoder_select="vp3_decoder"
2225 thp_decoder_select="mjpeg_decoder"
2226 tiff_decoder_suggest="zlib lzma"
2227 tiff_encoder_suggest="zlib"
2228 truehd_decoder_select="mlp_parser"
2229 truemotion2_decoder_select="bswapdsp"
2230 truespeech_decoder_select="bswapdsp"
2231 tscc_decoder_select="zlib"
2232 twinvq_decoder_select="mdct lsp sinewin"
2233 utvideo_decoder_select="bswapdsp"
2234 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2235 vble_decoder_select="huffyuvdsp"
2236 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2237 vc1image_decoder_select="vc1_decoder"
2238 vorbis_decoder_select="mdct"
2239 vorbis_encoder_select="mdct"
2240 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2241 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
2242 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
2243 vp6a_decoder_select="vp6_decoder"
2244 vp6f_decoder_select="vp6_decoder"
2245 vp7_decoder_select="h264pred videodsp"
2246 vp8_decoder_select="h264pred videodsp"
2247 vp9_decoder_select="videodsp vp9_parser"
2248 webp_decoder_select="vp8_decoder"
2249 wmalossless_decoder_select="llauddsp"
2250 wmapro_decoder_select="mdct sinewin wma_freqs"
2251 wmav1_decoder_select="mdct sinewin wma_freqs"
2252 wmav1_encoder_select="mdct sinewin wma_freqs"
2253 wmav2_decoder_select="mdct sinewin wma_freqs"
2254 wmav2_encoder_select="mdct sinewin wma_freqs"
2255 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2256 wmv1_decoder_select="h263_decoder"
2257 wmv1_encoder_select="h263_encoder"
2258 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp"
2259 wmv2_encoder_select="h263_encoder"
2260 wmv3_decoder_select="vc1_decoder"
2261 wmv3image_decoder_select="wmv3_decoder"
2262 zerocodec_decoder_select="zlib"
2263 zlib_decoder_select="zlib"
2264 zlib_encoder_select="zlib"
2265 zmbv_decoder_select="zlib"
2266 zmbv_encoder_select="zlib"
2267
2268 # hardware accelerators
2269 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2270 dxva2_deps="dxva2api_h"
2271 vaapi_deps="va_va_h"
2272 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2273 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2274 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2275 xvmc_deps="X11_extensions_XvMClib_h"
2276
2277 h263_vaapi_hwaccel_deps="vaapi"
2278 h263_vaapi_hwaccel_select="h263_decoder"
2279 h263_vdpau_hwaccel_deps="vdpau"
2280 h263_vdpau_hwaccel_select="h263_decoder"
2281 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2282 h264_dxva2_hwaccel_deps="dxva2"
2283 h264_dxva2_hwaccel_select="h264_decoder"
2284 h264_vaapi_hwaccel_deps="vaapi"
2285 h264_vaapi_hwaccel_select="h264_decoder"
2286 h264_vda_decoder_deps="vda"
2287 h264_vda_decoder_select="h264_decoder"
2288 h264_vda_hwaccel_deps="vda"
2289 h264_vda_hwaccel_select="h264_decoder"
2290 h264_vda_old_hwaccel_deps="vda"
2291 h264_vda_old_hwaccel_select="h264_decoder"
2292 h264_vdpau_decoder_deps="vdpau"
2293 h264_vdpau_decoder_select="h264_decoder"
2294 h264_vdpau_hwaccel_deps="vdpau"
2295 h264_vdpau_hwaccel_select="h264_decoder"
2296 mpeg_vdpau_decoder_deps="vdpau"
2297 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2298 mpeg_xvmc_hwaccel_deps="xvmc"
2299 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2300 mpeg1_vdpau_decoder_deps="vdpau"
2301 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2302 mpeg1_vdpau_hwaccel_deps="vdpau"
2303 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2304 mpeg1_xvmc_hwaccel_deps="xvmc"
2305 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2306 mpeg2_crystalhd_decoder_select="crystalhd"
2307 mpeg2_dxva2_hwaccel_deps="dxva2"
2308 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2309 mpeg2_vaapi_hwaccel_deps="vaapi"
2310 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2311 mpeg2_vdpau_hwaccel_deps="vdpau"
2312 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2313 mpeg2_xvmc_hwaccel_deps="xvmc"
2314 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2315 mpeg4_crystalhd_decoder_select="crystalhd"
2316 mpeg4_vaapi_hwaccel_deps="vaapi"
2317 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2318 mpeg4_vdpau_decoder_deps="vdpau"
2319 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2320 mpeg4_vdpau_hwaccel_deps="vdpau"
2321 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2322 msmpeg4_crystalhd_decoder_select="crystalhd"
2323 vc1_crystalhd_decoder_select="crystalhd"
2324 vc1_dxva2_hwaccel_deps="dxva2"
2325 vc1_dxva2_hwaccel_select="vc1_decoder"
2326 vc1_vaapi_hwaccel_deps="vaapi"
2327 vc1_vaapi_hwaccel_select="vc1_decoder"
2328 vc1_vdpau_decoder_deps="vdpau"
2329 vc1_vdpau_decoder_select="vc1_decoder"
2330 vc1_vdpau_hwaccel_deps="vdpau"
2331 vc1_vdpau_hwaccel_select="vc1_decoder"
2332 wmv3_crystalhd_decoder_select="crystalhd"
2333 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2334 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2335 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2336 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2337
2338 # parsers
2339 h264_parser_select="h264_decoder"
2340 hevc_parser_select="hevc_decoder"
2341 mpegvideo_parser_select="mpegvideo"
2342 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2343 vc1_parser_select="mpegvideo startcode vc1_decoder"
2344
2345 # external libraries
2346 libaacplus_encoder_deps="libaacplus"
2347 libcelt_decoder_deps="libcelt"
2348 libfaac_encoder_deps="libfaac"
2349 libfaac_encoder_select="audio_frame_queue"
2350 libfdk_aac_decoder_deps="libfdk_aac"
2351 libfdk_aac_encoder_deps="libfdk_aac"
2352 libfdk_aac_encoder_select="audio_frame_queue"
2353 libgme_demuxer_deps="libgme"
2354 libgsm_decoder_deps="libgsm"
2355 libgsm_encoder_deps="libgsm"
2356 libgsm_ms_decoder_deps="libgsm"
2357 libgsm_ms_encoder_deps="libgsm"
2358 libilbc_decoder_deps="libilbc"
2359 libilbc_encoder_deps="libilbc"
2360 libmodplug_demuxer_deps="libmodplug"
2361 libmp3lame_encoder_deps="libmp3lame"
2362 libmp3lame_encoder_select="audio_frame_queue"
2363 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2364 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2365 libopencore_amrnb_encoder_select="audio_frame_queue"
2366 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2367 libopenh264_encoder_deps="libopenh264"
2368 libopenjpeg_decoder_deps="libopenjpeg"
2369 libopenjpeg_encoder_deps="libopenjpeg"
2370 libopus_decoder_deps="libopus"
2371 libopus_encoder_deps="libopus"
2372 libopus_encoder_select="audio_frame_queue"
2373 libquvi_demuxer_deps="libquvi"
2374 libschroedinger_decoder_deps="libschroedinger"
2375 libschroedinger_encoder_deps="libschroedinger"
2376 libshine_encoder_deps="libshine"
2377 libshine_encoder_select="audio_frame_queue"
2378 libspeex_decoder_deps="libspeex"
2379 libspeex_encoder_deps="libspeex"
2380 libspeex_encoder_select="audio_frame_queue"
2381 libstagefright_h264_decoder_deps="libstagefright_h264"
2382 libtheora_encoder_deps="libtheora"
2383 libtwolame_encoder_deps="libtwolame"
2384 libvo_aacenc_encoder_deps="libvo_aacenc"
2385 libvo_aacenc_encoder_select="audio_frame_queue"
2386 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2387 libvorbis_decoder_deps="libvorbis"
2388 libvorbis_encoder_deps="libvorbis"
2389 libvorbis_encoder_select="audio_frame_queue"
2390 libvpx_vp8_decoder_deps="libvpx"
2391 libvpx_vp8_encoder_deps="libvpx"
2392 libvpx_vp9_decoder_deps="libvpx"
2393 libvpx_vp9_encoder_deps="libvpx"
2394 libwavpack_encoder_deps="libwavpack"
2395 libwebp_encoder_deps="libwebp"
2396 libx264_encoder_deps="libx264"
2397 libx264rgb_encoder_deps="libx264"
2398 libx264rgb_encoder_select="libx264_encoder"
2399 libx265_encoder_deps="libx265"
2400 libxavs_encoder_deps="libxavs"
2401 libxvid_encoder_deps="libxvid"
2402 libutvideo_decoder_deps="libutvideo"
2403 libutvideo_encoder_deps="libutvideo"
2404 libzvbi_teletext_decoder_deps="libzvbi"
2405 nvenc_encoder_deps="nvenc"
2406
2407 # demuxers / muxers
2408 ac3_demuxer_select="ac3_parser"
2409 asf_demuxer_select="riffdec"
2410 asf_muxer_select="riffenc"
2411 asf_stream_muxer_select="asf_muxer"
2412 avi_demuxer_select="riffdec exif"
2413 avi_muxer_select="riffenc"
2414 avisynth_demuxer_deps="avisynth"
2415 avisynth_demuxer_select="riffdec"
2416 caf_demuxer_select="riffdec"
2417 dash_muxer_select="mp4_muxer"
2418 dirac_demuxer_select="dirac_parser"
2419 dts_demuxer_select="dca_parser"
2420 dtshd_demuxer_select="dca_parser"
2421 dv_demuxer_select="dvprofile"
2422 dv_muxer_select="dvprofile"
2423 dxa_demuxer_select="riffdec"
2424 eac3_demuxer_select="ac3_parser"
2425 f4v_muxer_select="mov_muxer"
2426 flac_demuxer_select="flac_parser"
2427 hds_muxer_select="flv_muxer"
2428 hls_muxer_select="mpegts_muxer"
2429 image2_alias_pix_demuxer_select="image2_demuxer"
2430 image2_brender_pix_demuxer_select="image2_demuxer"
2431 ipod_muxer_select="mov_muxer"
2432 ismv_muxer_select="mov_muxer"
2433 libnut_demuxer_deps="libnut"
2434 libnut_muxer_deps="libnut"
2435 matroska_audio_muxer_select="matroska_muxer"
2436 matroska_demuxer_select="riffdec"
2437 matroska_demuxer_suggest="bzlib lzo zlib"
2438 matroska_muxer_select="riffenc"
2439 mmf_muxer_select="riffenc"
2440 mov_demuxer_select="riffdec"
2441 mov_demuxer_suggest="zlib"
2442 mov_muxer_select="riffenc rtpenc_chain"
2443 mp3_demuxer_select="mpegaudio_parser"
2444 mp4_muxer_select="mov_muxer"
2445 mpegts_muxer_select="adts_muxer latm_muxer"
2446 mpegtsraw_demuxer_select="mpegts_demuxer"
2447 mxf_d10_muxer_select="mxf_muxer"
2448 nut_muxer_select="riffenc"
2449 nuv_demuxer_select="riffdec"
2450 oga_muxer_select="ogg_muxer"
2451 ogg_demuxer_select="golomb"
2452 opus_muxer_select="ogg_muxer"
2453 psp_muxer_select="mov_muxer"
2454 rtp_demuxer_select="sdp_demuxer"
2455 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2456 rtsp_demuxer_select="http_protocol rtpdec"
2457 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2458 sap_demuxer_select="sdp_demuxer"
2459 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2460 sdp_demuxer_select="rtpdec"
2461 smoothstreaming_muxer_select="ismv_muxer"
2462 spdif_muxer_select="aac_parser"
2463 spx_muxer_select="ogg_muxer"
2464 tak_demuxer_select="tak_parser"
2465 tg2_muxer_select="mov_muxer"
2466 tgp_muxer_select="mov_muxer"
2467 vobsub_demuxer_select="mpegps_demuxer"
2468 w64_demuxer_select="wav_demuxer"
2469 w64_muxer_select="wav_muxer"
2470 wav_demuxer_select="riffdec"
2471 wav_muxer_select="riffenc"
2472 webm_muxer_select="riffenc"
2473 wtv_demuxer_select="riffdec"
2474 wtv_muxer_select="riffenc"
2475 xmv_demuxer_select="riffdec"
2476 xwma_demuxer_select="riffdec"
2477
2478 # indevs / outdevs
2479 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2480 alsa_outdev_deps="alsa_asoundlib_h"
2481 avfoundation_indev_extralibs="-framework CoreVideo -framework Foundation -framework AVFoundation -framework CoreMedia -framework CoreGraphics"
2482 avfoundation_indev_select="avfoundation"
2483 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2484 caca_outdev_deps="libcaca"
2485 decklink_outdev_deps="decklink pthreads"
2486 decklink_outdev_extralibs="-lstdc++"
2487 decklink_indev_deps="decklink pthreads"
2488 decklink_indev_extralibs="-lstdc++"
2489 dshow_indev_deps="IBaseFilter"
2490 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32"
2491 dv1394_indev_deps="dv1394"
2492 dv1394_indev_select="dv_demuxer"
2493 fbdev_indev_deps="linux_fb_h"
2494 fbdev_outdev_deps="linux_fb_h"
2495 gdigrab_indev_deps="CreateDIBSection"
2496 gdigrab_indev_extralibs="-lgdi32"
2497 gdigrab_indev_select="bmp_decoder"
2498 iec61883_indev_deps="libiec61883"
2499 jack_indev_deps="jack_jack_h sem_timedwait"
2500 lavfi_indev_deps="avfilter"
2501 libcdio_indev_deps="libcdio"
2502 libdc1394_indev_deps="libdc1394"
2503 libv4l2_indev_deps="libv4l2"
2504 openal_indev_deps="openal"
2505 opengl_outdev_deps="opengl"
2506 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2507 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2508 pulse_indev_deps="libpulse"
2509 pulse_outdev_deps="libpulse"
2510 qtkit_indev_extralibs="-framework QTKit -framework Foundation -framework QuartzCore"
2511 qtkit_indev_select="qtkit"
2512 sdl_outdev_deps="sdl"
2513 sndio_indev_deps="sndio_h"
2514 sndio_outdev_deps="sndio_h"
2515 v4l_indev_deps="linux_videodev_h"
2516 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2517 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2518 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2519 vfwcap_indev_extralibs="-lavicap32"
2520 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2521 xv_outdev_extralibs="-lXv -lX11 -lXext"
2522 x11grab_indev_deps="x11grab"
2523 x11grab_xcb_indev_deps="libxcb"
2524
2525 # protocols
2526 bluray_protocol_deps="libbluray"
2527 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2528 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2529 ffrtmpcrypt_protocol_select="tcp_protocol"
2530 ffrtmphttp_protocol_deps="!librtmp_protocol"
2531 ffrtmphttp_protocol_select="http_protocol"
2532 ftp_protocol_select="tcp_protocol"
2533 gopher_protocol_select="network"
2534 http_protocol_select="tcp_protocol"
2535 httpproxy_protocol_select="tcp_protocol"
2536 https_protocol_select="tls_protocol"
2537 icecast_protocol_select="http_protocol"
2538 librtmp_protocol_deps="librtmp"
2539 librtmpe_protocol_deps="librtmp"
2540 librtmps_protocol_deps="librtmp"
2541 librtmpt_protocol_deps="librtmp"
2542 librtmpte_protocol_deps="librtmp"
2543 libsmbclient_protocol_deps="libsmbclient gplv3"
2544 libssh_protocol_deps="libssh"
2545 mmsh_protocol_select="http_protocol"
2546 mmst_protocol_select="network"
2547 rtmp_protocol_deps="!librtmp_protocol"
2548 rtmp_protocol_select="tcp_protocol"
2549 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2550 rtmps_protocol_deps="!librtmp_protocol"
2551 rtmps_protocol_select="tls_protocol"
2552 rtmpt_protocol_select="ffrtmphttp_protocol"
2553 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2554 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2555 rtp_protocol_select="udp_protocol"
2556 sctp_protocol_deps="struct_sctp_event_subscribe"
2557 sctp_protocol_select="network"
2558 srtp_protocol_select="rtp_protocol"
2559 tcp_protocol_select="network"
2560 tls_protocol_deps_any="openssl gnutls"
2561 tls_protocol_select="tcp_protocol"
2562 udp_protocol_select="network"
2563 udplite_protocol_select="network"
2564 unix_protocol_deps="sys_un_h"
2565 unix_protocol_select="network"
2566
2567 # filters
2568 amovie_filter_deps="avcodec avformat"
2569 aresample_filter_deps="swresample"
2570 ass_filter_deps="libass"
2571 asyncts_filter_deps="avresample"
2572 atempo_filter_deps="avcodec"
2573 atempo_filter_select="rdft"
2574 azmq_filter_deps="libzmq"
2575 blackframe_filter_deps="gpl"
2576 boxblur_filter_deps="gpl"
2577 bs2b_filter_deps="libbs2b"
2578 colormatrix_filter_deps="gpl"
2579 cropdetect_filter_deps="gpl"
2580 delogo_filter_deps="gpl"
2581 deshake_filter_select="pixelutils"
2582 drawtext_filter_deps="libfreetype"
2583 ebur128_filter_deps="gpl"
2584 eq_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 pp7_filter_deps="gpl"
2604 ocv_filter_deps="libopencv"
2605 owdenoise_filter_deps="gpl"
2606 pan_filter_deps="swresample"
2607 phase_filter_deps="gpl"
2608 pp_filter_deps="gpl postproc"
2609 pullup_filter_deps="gpl"
2610 removelogo_filter_deps="avcodec avformat swscale"
2611 resample_filter_deps="avresample"
2612 sab_filter_deps="gpl swscale"
2613 scale_filter_deps="swscale"
2614 select_filter_select="pixelutils"
2615 smartblur_filter_deps="gpl swscale"
2616 showspectrum_filter_deps="avcodec"
2617 showspectrum_filter_select="rdft"
2618 spp_filter_deps="gpl avcodec"
2619 spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
2620 stereo3d_filter_deps="gpl"
2621 subtitles_filter_deps="avformat avcodec libass"
2622 super2xsai_filter_deps="gpl"
2623 tinterlace_filter_deps="gpl"
2624 vidstabdetect_filter_deps="libvidstab"
2625 vidstabtransform_filter_deps="libvidstab"
2626 pixfmts_super2xsai_test_deps="super2xsai_filter"
2627 tinterlace_merge_test_deps="tinterlace_filter"
2628 tinterlace_pad_test_deps="tinterlace_filter"
2629 uspp_filter_deps="gpl avcodec"
2630 zmq_filter_deps="libzmq"
2631 zoompan_filter_deps="swscale"
2632
2633 # examples
2634 avio_reading="avformat avcodec avutil"
2635 avcodec_example_deps="avcodec avutil"
2636 decoding_encoding_example_deps="avcodec avformat avutil"
2637 demuxing_decoding_example_deps="avcodec avformat avutil"
2638 extract_mvs_example_deps="avcodec avformat avutil"
2639 filter_audio_example_deps="avfilter avutil"
2640 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2641 filtering_video_example_deps="avfilter avcodec avformat avutil"
2642 metadata_example_deps="avformat avutil"
2643 muxing_example_deps="avcodec avformat avutil swscale"
2644 remuxing_example_deps="avcodec avformat avutil"
2645 resampling_audio_example_deps="avutil swresample"
2646 scaling_video_example_deps="avutil swscale"
2647 transcode_aac_example_deps="avcodec avformat swresample"
2648 transcoding_example_deps="avfilter avcodec avformat avutil"
2649
2650 # libraries, in linking order
2651 avcodec_deps="avutil"
2652 avdevice_deps="avformat avcodec avutil"
2653 avfilter_deps="avutil"
2654 avformat_deps="avcodec avutil"
2655 avresample_deps="avutil"
2656 postproc_deps="avutil gpl"
2657 swresample_deps="avutil"
2658 swscale_deps="avutil"
2659
2660 # programs
2661 ffmpeg_deps="avcodec avfilter avformat swresample"
2662 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2663                null_filter
2664                setpts_filter trim_filter"
2665 ffplay_deps="avcodec avformat swscale swresample sdl"
2666 ffplay_libs='$sdl_libs'
2667 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
2668 ffprobe_deps="avcodec avformat"
2669 ffserver_deps="avformat fork sarestart"
2670 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2671
2672 # documentation
2673 podpages_deps="perl"
2674 manpages_deps="perl pod2man"
2675 htmlpages_deps="perl"
2676 htmlpages_deps_any="makeinfo_html texi2html"
2677 txtpages_deps="perl makeinfo"
2678 doc_deps_any="manpages htmlpages podpages txtpages"
2679
2680 # default parameters
2681
2682 logfile="config.log"
2683
2684 # installation paths
2685 prefix_default="/usr/local"
2686 bindir_default='${prefix}/bin'
2687 datadir_default='${prefix}/share/ffmpeg'
2688 docdir_default='${prefix}/share/doc/ffmpeg'
2689 incdir_default='${prefix}/include'
2690 libdir_default='${prefix}/lib'
2691 mandir_default='${prefix}/share/man'
2692
2693 # toolchain
2694 ar_default="ar"
2695 cc_default="gcc"
2696 cxx_default="g++"
2697 host_cc_default="gcc"
2698 cp_f="cp -f"
2699 doxygen_default="doxygen"
2700 install="install"
2701 ln_s="ln -s -f"
2702 nm_default="nm -g"
2703 objformat="elf"
2704 pkg_config_default=pkg-config
2705 if ranlib 2>&1 | grep -q "\-D "; then
2706     ranlib_default="ranlib -D"
2707 else
2708     ranlib_default="ranlib"
2709 fi
2710 strip_default="strip"
2711 yasmexe_default="yasm"
2712 windres_default="windres"
2713
2714 # OS
2715 target_os_default=$(tolower $(uname -s))
2716 host_os=$target_os_default
2717
2718 # machine
2719 if test "$target_os_default" = aix; then
2720     arch_default=$(uname -p)
2721     strip_default="strip -X32_64"
2722 else
2723     arch_default=$(uname -m)
2724 fi
2725 cpu="generic"
2726 intrinsics="none"
2727
2728 # configurable options
2729 enable $PROGRAM_LIST
2730 enable $DOCUMENT_LIST
2731 enable $EXAMPLE_LIST
2732 enable $(filter_out avresample $LIBRARY_LIST)
2733 enable stripping
2734
2735 enable asm
2736 enable debug
2737 enable doc
2738 enable faan faandct faanidct
2739 enable optimizations
2740 enable runtime_cpudetect
2741 enable safe_bitstream_reader
2742 enable static
2743 enable swscale_alpha
2744
2745 sws_max_filter_size_default=256
2746 set_default sws_max_filter_size
2747
2748 # Enable hwaccels by default.
2749 enable dxva2 vaapi vda vdpau xvmc
2750 enable xlib
2751
2752 # build settings
2753 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2754 LIBPREF="lib"
2755 LIBSUF=".a"
2756 FULLNAME='$(NAME)$(BUILDSUF)'
2757 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2758 SLIBPREF="lib"
2759 SLIBSUF=".so"
2760 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2761 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2762 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2763 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2764 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2765 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2766
2767 asflags_filter=echo
2768 cflags_filter=echo
2769 ldflags_filter=echo
2770
2771 AS_C='-c'
2772 AS_O='-o $@'
2773 CC_C='-c'
2774 CC_E='-E -o $@'
2775 CC_O='-o $@'
2776 CXX_C='-c'
2777 CXX_O='-o $@'
2778 LD_O='-o $@'
2779 LD_LIB='-l%'
2780 LD_PATH='-L'
2781 HOSTCC_C='-c'
2782 HOSTCC_E='-E -o $@'
2783 HOSTCC_O='-o $@'
2784 HOSTLD_O='-o $@'
2785
2786 host_libs='-lm'
2787 host_cflags_filter=echo
2788 host_ldflags_filter=echo
2789
2790 target_path='$(CURDIR)'
2791
2792 # since the object filename is not given with the -MM flag, the compiler
2793 # is only able to print the basename, and we must add the path ourselves
2794 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2795 DEPFLAGS='-MM'
2796
2797 # find source path
2798 if test -f configure; then
2799     source_path=.
2800 else
2801     source_path=$(cd $(dirname "$0"); pwd)
2802     echo "$source_path" | grep -q '[[:blank:]]' &&
2803         die "Out of tree builds are impossible with whitespace in source path."
2804     test -e "$source_path/config.h" &&
2805         die "Out of tree builds are impossible with config.h in source dir."
2806 fi
2807
2808 for v in "$@"; do
2809     r=${v#*=}
2810     l=${v%"$r"}
2811     r=$(sh_quote "$r")
2812     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2813 done
2814
2815 find_things(){
2816     thing=$1
2817     pattern=$2
2818     file=$source_path/$3
2819     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2820 }
2821
2822 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2823 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2824 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2825 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2826 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2827 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2828 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2829 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2830 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2831 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2832 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2833
2834 ALL_COMPONENTS="
2835     $BSF_LIST
2836     $DECODER_LIST
2837     $DEMUXER_LIST
2838     $ENCODER_LIST
2839     $FILTER_LIST
2840     $HWACCEL_LIST
2841     $INDEV_LIST
2842     $MUXER_LIST
2843     $OUTDEV_LIST
2844     $PARSER_LIST
2845     $PROTOCOL_LIST
2846 "
2847
2848 for n in $COMPONENT_LIST; do
2849     v=$(toupper ${n%s})_LIST
2850     eval enable \$$v
2851     eval ${n}_if_any="\$$v"
2852 done
2853
2854 enable $ARCH_EXT_LIST
2855
2856 die_unknown(){
2857     echo "Unknown option \"$1\"."
2858     echo "See $0 --help for available options."
2859     exit 1
2860 }
2861
2862 print_3_columns() {
2863     cat | tr ' ' '\n' | sort | pr -r -3 -t
2864 }
2865
2866 show_list() {
2867     suffix=_$1
2868     shift
2869     echo $* | sed s/$suffix//g | print_3_columns
2870     exit 0
2871 }
2872
2873 rand_list(){
2874     IFS=', '
2875     set -- $*
2876     unset IFS
2877     for thing; do
2878         comp=${thing%:*}
2879         prob=${thing#$comp}
2880         prob=${prob#:}
2881         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2882         echo "prob ${prob:-0.5}"
2883         printf '%s\n' $comp
2884     done
2885 }
2886
2887 do_random(){
2888     action=$1
2889     shift
2890     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2891     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2892 }
2893
2894 for opt do
2895     optval="${opt#*=}"
2896     case "$opt" in
2897         --extra-ldflags=*)
2898             add_ldflags $optval
2899         ;;
2900         --extra-ldexeflags=*)
2901             add_ldexeflags $optval
2902         ;;
2903         --extra-libs=*)
2904             add_extralibs $optval
2905         ;;
2906         --disable-devices)
2907             disable $INDEV_LIST $OUTDEV_LIST
2908         ;;
2909         --enable-debug=*)
2910             debuglevel="$optval"
2911         ;;
2912         --disable-programs)
2913             disable $PROGRAM_LIST
2914         ;;
2915         --disable-everything)
2916             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2917         ;;
2918         --disable-all)
2919             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2920             disable $LIBRARY_LIST $PROGRAM_LIST doc
2921         ;;
2922         --enable-random|--disable-random)
2923             action=${opt%%-random}
2924             do_random ${action#--} $COMPONENT_LIST
2925         ;;
2926         --enable-random=*|--disable-random=*)
2927             action=${opt%%-random=*}
2928             do_random ${action#--} $optval
2929         ;;
2930         --enable-*=*|--disable-*=*)
2931             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2932             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2933             eval list=\$$(toupper $thing)_LIST
2934             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2935             list=$(filter "$name" $list)
2936             [ "$list" = "" ] && warn "Option $opt did not match anything"
2937             $action $list
2938         ;;
2939         --enable-?*|--disable-?*)
2940             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2941             if is_in $option $COMPONENT_LIST; then
2942                 test $action = disable && action=unset
2943                 eval $action \$$(toupper ${option%s})_LIST
2944             elif is_in $option $CMDLINE_SELECT; then
2945                 $action $option
2946             else
2947                 die_unknown $opt
2948             fi
2949         ;;
2950         --list-*)
2951             NAME="${opt#--list-}"
2952             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2953             NAME=${NAME%s}
2954             eval show_list $NAME \$$(toupper $NAME)_LIST
2955         ;;
2956         --help|-h) show_help
2957         ;;
2958         --fatal-warnings) enable fatal_warnings
2959         ;;
2960         *)
2961             optname="${opt%%=*}"
2962             optname="${optname#--}"
2963             optname=$(echo "$optname" | sed 's/-/_/g')
2964             if is_in $optname $CMDLINE_SET; then
2965                 eval $optname='$optval'
2966             elif is_in $optname $CMDLINE_APPEND; then
2967                 append $optname "$optval"
2968             else
2969                 die_unknown $opt
2970             fi
2971         ;;
2972     esac
2973 done
2974
2975 disabled logging && logfile=/dev/null
2976
2977 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2978 set >> $logfile
2979
2980 test -n "$cross_prefix" && enable cross_compile
2981
2982 if enabled cross_compile; then
2983     test -n "$arch" && test -n "$target_os" ||
2984         die "Must specify target arch and OS when cross-compiling"
2985 fi
2986
2987 ar_default="${cross_prefix}${ar_default}"
2988 cc_default="${cross_prefix}${cc_default}"
2989 cxx_default="${cross_prefix}${cxx_default}"
2990 nm_default="${cross_prefix}${nm_default}"
2991 pkg_config_default="${cross_prefix}${pkg_config_default}"
2992 ranlib_default="${cross_prefix}${ranlib_default}"
2993 strip_default="${cross_prefix}${strip_default}"
2994 windres_default="${cross_prefix}${windres_default}"
2995
2996 sysinclude_default="${sysroot}/usr/include"
2997
2998 test -n "$valgrind" && toolchain="valgrind-memcheck"
2999
3000 case "$toolchain" in
3001     clang-asan)
3002         cc_default="clang"
3003         add_cflags  -fsanitize=address
3004         add_ldflags -fsanitize=address
3005     ;;
3006     clang-tsan)
3007         cc_default="clang"
3008         add_cflags  -fsanitize=thread -pie
3009         add_ldflags -fsanitize=thread -pie
3010     ;;
3011     clang-usan)
3012         cc_default="clang"
3013         add_cflags  -fsanitize=undefined
3014         add_ldflags -fsanitize=undefined
3015     ;;
3016     gcc-asan)
3017         cc_default="gcc"
3018         add_cflags  -fsanitize=address
3019         add_ldflags -fsanitize=address
3020     ;;
3021     gcc-tsan)
3022         cc_default="gcc"
3023         add_cflags  -fsanitize=thread -pie -fPIC
3024         add_ldflags -fsanitize=thread -pie -fPIC
3025     ;;
3026     gcc-usan)
3027         cc_default="gcc"
3028         add_cflags  -fsanitize=undefined
3029         add_ldflags -fsanitize=undefined
3030     ;;
3031     valgrind-massif)
3032         target_exec_default=${valgrind:-"valgrind"}
3033         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"
3034     ;;
3035     valgrind-memcheck)
3036         target_exec_default=${valgrind:-"valgrind"}
3037         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
3038     ;;
3039     msvc)
3040         # Check whether the current MSVC version needs the C99 converter.
3041         # From MSVC 2013 (compiler major version 18) onwards, it does actually
3042         # support enough of C99 to build ffmpeg. Default to the new
3043         # behaviour if the regexp was unable to match anything, since this
3044         # successfully parses the version number of existing supported
3045         # versions that require the converter (MSVC 2010 and 2012).
3046         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
3047         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
3048             cc_default="cl"
3049         else
3050             cc_default="c99wrap cl"
3051         fi
3052         ld_default="link"
3053         nm_default="dumpbin -symbols"
3054         ar_default="lib"
3055         target_os_default="win32"
3056         # Use a relative path for TMPDIR. This makes sure all the
3057         # ffconf temp files are written with a relative path, avoiding
3058         # issues with msys/win32 path conversion for MSVC parameters
3059         # such as -Fo<file> or -out:<file>.
3060         TMPDIR=.
3061     ;;
3062     icl)
3063         cc_default="icl"
3064         ld_default="xilink"
3065         nm_default="dumpbin -symbols"
3066         ar_default="xilib"
3067         target_os_default="win32"
3068         TMPDIR=.
3069     ;;
3070     gcov)
3071         add_cflags  -fprofile-arcs -ftest-coverage
3072         add_ldflags -fprofile-arcs -ftest-coverage
3073     ;;
3074     hardened)
3075         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
3076         add_cflags   -fno-strict-overflow -fstack-protector-all
3077         add_ldflags  -Wl,-z,relro -Wl,-z,now
3078     ;;
3079     ?*)
3080         die "Unknown toolchain $toolchain"
3081     ;;
3082 esac
3083
3084 set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
3085     target_exec target_os yasmexe
3086 enabled cross_compile || host_cc_default=$cc
3087 set_default host_cc
3088
3089 pkg_config_fail_message=""
3090 if ! $pkg_config --version >/dev/null 2>&1; then
3091     warn "$pkg_config not found, library detection may fail."
3092     pkg_config=false
3093 elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
3094     pkg_config_fail_message="
3095 Note: When building a static binary, add --pkg-config-flags=\"--static\"."
3096 fi
3097
3098 if test $doxygen != $doxygen_default && \
3099   ! $doxygen --version >/dev/null 2>&1; then
3100     warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
3101 fi
3102
3103 exesuf() {
3104     case $1 in
3105         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3106     esac
3107 }
3108
3109 EXESUF=$(exesuf $target_os)
3110 HOSTEXESUF=$(exesuf $host_os)
3111
3112 # set temporary file name
3113 : ${TMPDIR:=$TEMPDIR}
3114 : ${TMPDIR:=$TMP}
3115 : ${TMPDIR:=/tmp}
3116
3117 if [ -n "$tempprefix" ] ; then
3118     mktemp(){
3119         echo $tempprefix.${HOSTNAME}.${UID}
3120     }
3121 elif ! check_cmd mktemp -u XXXXXX; then
3122     # simple replacement for missing mktemp
3123     # NOT SAFE FOR GENERAL USE
3124     mktemp(){
3125         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3126     }
3127 fi
3128
3129 tmpfile(){
3130     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
3131         (set -C; exec > $tmp) 2>/dev/null ||
3132         die "Unable to create temporary file in $TMPDIR."
3133     append TMPFILES $tmp
3134     eval $1=$tmp
3135 }
3136
3137 trap 'rm -f -- $TMPFILES' EXIT
3138
3139 tmpfile TMPASM .asm
3140 tmpfile TMPC   .c
3141 tmpfile TMPCPP .cpp
3142 tmpfile TMPE   $EXESUF
3143 tmpfile TMPH   .h
3144 tmpfile TMPM   .m
3145 tmpfile TMPO   .o
3146 tmpfile TMPS   .S
3147 tmpfile TMPSH  .sh
3148 tmpfile TMPV   .ver
3149
3150 unset -f mktemp
3151
3152 chmod +x $TMPE
3153
3154 # make sure we can execute files in $TMPDIR
3155 cat > $TMPSH 2>> $logfile <<EOF
3156 #! /bin/sh
3157 EOF
3158 chmod +x $TMPSH >> $logfile 2>&1
3159 if ! $TMPSH >> $logfile 2>&1; then
3160     cat <<EOF
3161 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3162 variable to another directory and make sure that it is not mounted noexec.
3163 EOF
3164     die "Sanity test failed."
3165 fi
3166
3167 armasm_flags(){
3168     for flag; do
3169         case $flag in
3170             # Filter out MSVC cl.exe options from cflags that shouldn't
3171             # be passed to gas-preprocessor
3172             -M[TD]*)                                            ;;
3173             *)                  echo $flag                      ;;
3174         esac
3175    done
3176 }
3177
3178 ccc_flags(){
3179     for flag; do
3180         case $flag in
3181             -std=c99)           echo -c99                       ;;
3182             -mcpu=*)            echo -arch ${flag#*=}           ;;
3183             -mieee)             echo -ieee                      ;;
3184             -O*|-fast)          echo $flag                      ;;
3185             -fno-math-errno)    echo -assume nomath_errno       ;;
3186             -g)                 echo -g3                        ;;
3187             -Wall)              echo -msg_enable level2         ;;
3188             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3189             -Wl,*)              echo $flag                      ;;
3190             -f*|-W*)                                            ;;
3191             *)                  echo $flag                      ;;
3192         esac
3193    done
3194 }
3195
3196 cparser_flags(){
3197     for flag; do
3198         case $flag in
3199             -Wno-switch)             echo -Wno-switch-enum ;;
3200             -Wno-format-zero-length) ;;
3201             -Wdisabled-optimization) ;;
3202             -Wno-pointer-sign)       echo -Wno-other ;;
3203             *)                       echo $flag ;;
3204         esac
3205     done
3206 }
3207
3208 msvc_common_flags(){
3209     for flag; do
3210         case $flag in
3211             # In addition to specifying certain flags under the compiler
3212             # specific filters, they must be specified here as well or else the
3213             # generic catch all at the bottom will print the original flag.
3214             -Wall)                ;;
3215             -std=c99)             ;;
3216             # Common flags
3217             -fomit-frame-pointer) ;;
3218             -g)                   echo -Z7 ;;
3219             -fno-math-errno)      ;;
3220             -fno-common)          ;;
3221             -fno-signed-zeros)    ;;
3222             -fPIC)                ;;
3223             -mthumb)              ;;
3224             -march=*)             ;;
3225             -lz)                  echo zlib.lib ;;
3226             -lavifil32)           echo vfw32.lib ;;
3227             -lavicap32)           echo vfw32.lib user32.lib ;;
3228             -l*)                  echo ${flag#-l}.lib ;;
3229             -L*)                  echo -libpath:${flag#-L} ;;
3230             *)                    echo $flag ;;
3231         esac
3232     done
3233 }
3234
3235 msvc_flags(){
3236     msvc_common_flags "$@"
3237     for flag; do
3238         case $flag in
3239             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3240                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3241                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3242                                        -wd4554 \
3243                                        -wd4273 -wd4701 ;;
3244         esac
3245     done
3246 }
3247
3248 icl_flags(){
3249     msvc_common_flags "$@"
3250     for flag; do
3251         case $flag in
3252             # Despite what Intel's documentation says -Wall, which is supported
3253             # on Windows, does enable remarks so disable them here.
3254             -Wall)                echo $flag -Qdiag-disable:remark ;;
3255             -std=c99)             echo -Qstd=c99 ;;
3256             -flto)                echo -ipo ;;
3257         esac
3258     done
3259 }
3260
3261 icc_flags(){
3262     for flag; do
3263         case $flag in
3264             -flto)                echo -ipo ;;
3265             *)                    echo $flag ;;
3266         esac
3267     done
3268 }
3269
3270 pgi_flags(){
3271     for flag; do
3272         case $flag in
3273             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3274             -fomit-frame-pointer) echo -Mnoframe ;;
3275             -g)                   echo -gopt ;;
3276             *)                    echo $flag ;;
3277         esac
3278     done
3279 }
3280
3281 suncc_flags(){
3282     for flag; do
3283         case $flag in
3284             -march=*|-mcpu=*)
3285                 case "${flag#*=}" in
3286                     native)                   echo -xtarget=native       ;;
3287                     v9|niagara)               echo -xarch=sparc          ;;
3288                     ultrasparc)               echo -xarch=sparcvis       ;;
3289                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3290                     i586|pentium)             echo -xchip=pentium        ;;
3291                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3292                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3293                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3294                     pentium4*)          echo -xtarget=pentium4           ;;
3295                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3296                     *-sse3)             echo -xarch=sse3                 ;;
3297                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3298                     bonnell)                   echo -xarch=ssse3         ;;
3299                     corei7|nehalem)            echo -xtarget=nehalem     ;;
3300                     westmere)                  echo -xtarget=westmere    ;;
3301                     silvermont)                echo -xarch=sse4_2        ;;
3302                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
3303                     core-avx*|ivybridge|haswell|broadwell)
3304                                                echo -xarch=avx           ;;
3305                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
3306                     btver1)                    echo -xarch=amdsse4a      ;;
3307                     btver2|bdver*)             echo -xarch=avx           ;;
3308                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3309                     k8|opteron|athlon64|athlon-fx)
3310                                                echo -xarch=sse2a         ;;
3311                     athlon*)                   echo -xarch=pentium_proa  ;;
3312                 esac
3313                 ;;
3314             -std=c99)             echo -xc99              ;;
3315             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3316             -fPIC)                echo -KPIC -xcode=pic32 ;;
3317             -W*,*)                echo $flag              ;;
3318             -f*-*|-W*|-mimpure-text)                      ;;
3319             -shared)              echo -G                 ;;
3320             *)                    echo $flag              ;;
3321         esac
3322     done
3323 }
3324
3325 tms470_flags(){
3326     for flag; do
3327         case $flag in
3328             -march=*|-mcpu=*)
3329                 case "${flag#*=}" in
3330                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3331                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3332                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3333                     armv6*|arm11*)          echo -mv=6   ;;
3334                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3335                                             echo -mv=5e  ;;
3336                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3337                 esac
3338                 ;;
3339             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3340             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3341             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3342             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3343             -msoft-float)   echo --float_support=vfplib       ;;
3344             -O[0-3]|-mf=*)  echo $flag                        ;;
3345             -g)             echo -g -mn                       ;;
3346             -pds=*)         echo $flag                        ;;
3347             -D*|-I*)        echo $flag                        ;;
3348             --gcc|--abi=*)  echo $flag                        ;;
3349             -me)            echo $flag                        ;;
3350         esac
3351     done
3352 }
3353
3354 probe_cc(){
3355     pfx=$1
3356     _cc=$2
3357
3358     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3359     unset _ld_o _ldflags _ld_lib _ld_path
3360     unset _depflags _DEPCMD _DEPFLAGS
3361     _flags_filter=echo
3362
3363     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3364         true # no-op to avoid reading stdin in following checks
3365     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3366         _type=llvm_gcc
3367         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
3368         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
3369         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3370         _cflags_speed='-O3'
3371         _cflags_size='-Os'
3372     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3373         _type=gcc
3374         gcc_version=$($_cc --version | head -n1)
3375         gcc_basever=$($_cc -dumpversion)
3376         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3377         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3378         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3379         if ! $_cc -dumpversion | grep -q '^2\.'; then
3380             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3381         fi
3382         _cflags_speed='-O3'
3383         _cflags_size='-Os'
3384     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3385         _type=icc
3386         _ident=$($_cc --version | head -n1)
3387         _depflags='-MMD'
3388         _cflags_speed='-O3'
3389         _cflags_size='-Os'
3390         _cflags_noopt='-O1'
3391         _flags_filter=icc_flags
3392     elif $_cc -v 2>&1 | grep -q xlc; then
3393         _type=xlc
3394         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3395         _cflags_speed='-O5'
3396         _cflags_size='-O5 -qcompact'
3397     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3398         _type=ccc
3399         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3400         _DEPFLAGS='-M'
3401         _cflags_speed='-fast'
3402         _cflags_size='-O1'
3403         _flags_filter=ccc_flags
3404     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3405         test -d "$sysroot" || die "No valid sysroot specified."
3406         _type=armcc
3407         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3408         armcc_conf="$PWD/armcc.conf"
3409         $_cc --arm_linux_configure                 \
3410              --arm_linux_config_file="$armcc_conf" \
3411              --configure_sysroot="$sysroot"        \
3412              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3413              die "Error creating armcc configuration file."
3414         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3415         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3416         as_default="${cross_prefix}gcc"
3417         _depflags='-MMD'
3418         _cflags_speed='-O3'
3419         _cflags_size='-Os'
3420     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3421         _type=tms470
3422         _ident=$($_cc -version | head -n1 | tr -s ' ')
3423         _flags='--gcc --abi=eabi -me'
3424         _cc_e='-ppl -fe=$@'
3425         _cc_o='-fe=$@'
3426         _depflags='-ppa -ppd=$(@:.o=.d)'
3427         _cflags_speed='-O3 -mf=5'
3428         _cflags_size='-O3 -mf=2'
3429         _flags_filter=tms470_flags
3430     elif $_cc -v 2>&1 | grep -q clang; then
3431         _type=clang
3432         _ident=$($_cc --version | head -n1)
3433         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3434         _cflags_speed='-O3'
3435         _cflags_size='-Os'
3436     elif $_cc -V 2>&1 | grep -q Sun; then
3437         _type=suncc
3438         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3439         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3440         _DEPFLAGS='-xM1 -xc99'
3441         _ldflags='-std=c99'
3442         _cflags_speed='-O5'
3443         _cflags_size='-O5 -xspace'
3444         _flags_filter=suncc_flags
3445     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3446         _type=pathscale
3447         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3448         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3449         _cflags_speed='-O2'
3450         _cflags_size='-Os'
3451         _flags_filter='filter_out -Wdisabled-optimization'
3452     elif $_cc -v 2>&1 | grep -q Open64; then
3453         _type=open64
3454         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3455         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3456         _cflags_speed='-O2'
3457         _cflags_size='-Os'
3458         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3459     elif $_cc -V 2>&1 | grep -q Portland; then
3460         _type=pgi
3461         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3462         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3463         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3464         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3465         _cflags_noopt="-O"
3466         _flags_filter=pgi_flags
3467     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3468         _type=armasm
3469         _ident=$($_cc | head -n1)
3470         # 4509: "This form of conditional instruction is deprecated"
3471         _flags="-nologo -ignore 4509"
3472         _flags_filter=armasm_flags
3473     elif $_cc 2>&1 | grep -q Intel; then
3474         _type=icl
3475         _ident=$($cc 2>&1 | head -n1)
3476         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3477         # Not only is O3 broken on 13.x+ but it is slower on all previous
3478         # versions (tested) as well.
3479         _cflags_speed="-O2"
3480         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3481         if $_cc 2>&1 | grep -q Linker; then
3482             _ld_o='-out:$@'
3483         else
3484             _ld_o='-Fe$@'
3485         fi
3486         _cc_o='-Fo$@'
3487         _cc_e='-P'
3488         _flags_filter=icl_flags
3489         _ld_lib='lib%.a'
3490         _ld_path='-libpath:'
3491         # -Qdiag-error to make icl error when seeing certain unknown arguments
3492         _flags='-nologo -Qdiag-error:4044,10157'
3493         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
3494         # with MSVC which enables it by default.
3495         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS -fp:precise'
3496         if [ $pfx = hostcc ]; then
3497             append _cflags -Dsnprintf=_snprintf
3498         fi
3499         disable stripping
3500     elif $_cc 2>&1 | grep -q Microsoft; then
3501         _type=msvc
3502         _ident=$($cc 2>&1 | head -n1)
3503         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3504         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3505         _cflags_speed="-O2"
3506         _cflags_size="-O1"
3507         if $_cc 2>&1 | grep -q Linker; then
3508             _ld_o='-out:$@'
3509         else
3510             _ld_o='-Fe$@'
3511         fi
3512         _cc_o='-Fo$@'
3513         _cc_e='-P -Fi$@'
3514         _flags_filter=msvc_flags
3515         _ld_lib='lib%.a'
3516         _ld_path='-libpath:'
3517         _flags='-nologo'
3518         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3519         if [ $pfx = hostcc ]; then
3520             append _cflags -Dsnprintf=_snprintf
3521         fi
3522         disable stripping
3523     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3524         _type=cparser
3525         _ident=$($_cc --version | head -n1)
3526         _depflags='-MMD'
3527         _cflags_speed='-O4'
3528         _cflags_size='-O2'
3529         _flags_filter=cparser_flags
3530     fi
3531
3532     eval ${pfx}_type=\$_type
3533     eval ${pfx}_ident=\$_ident
3534 }
3535
3536 set_ccvars(){
3537     eval ${1}_C=\${_cc_c-\${${1}_C}}
3538     eval ${1}_E=\${_cc_e-\${${1}_E}}
3539     eval ${1}_O=\${_cc_o-\${${1}_O}}
3540
3541     if [ -n "$_depflags" ]; then
3542         eval ${1}_DEPFLAGS=\$_depflags
3543     else
3544         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3545         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3546         eval DEP${1}FLAGS=\$_flags
3547     fi
3548 }
3549
3550 probe_cc cc "$cc"
3551 cflags_filter=$_flags_filter
3552 cflags_speed=$_cflags_speed
3553 cflags_size=$_cflags_size
3554 cflags_noopt=$_cflags_noopt
3555 add_cflags $_flags $_cflags
3556 cc_ldflags=$_ldflags
3557 set_ccvars CC
3558
3559 probe_cc hostcc "$host_cc"
3560 host_cflags_filter=$_flags_filter
3561 add_host_cflags  $_flags $_cflags
3562 set_ccvars HOSTCC
3563
3564 test -n "$cc_type" && enable $cc_type ||
3565     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3566
3567 : ${as_default:=$cc}
3568 : ${dep_cc_default:=$cc}
3569 : ${ld_default:=$cc}
3570 : ${host_ld_default:=$host_cc}
3571 set_default ar as dep_cc ld host_ld windres
3572
3573 probe_cc as "$as"
3574 asflags_filter=$_flags_filter
3575 add_asflags $_flags $_cflags
3576 set_ccvars AS
3577
3578 probe_cc ld "$ld"
3579 ldflags_filter=$_flags_filter
3580 add_ldflags $_flags $_ldflags
3581 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3582 LD_O=${_ld_o-$LD_O}
3583 LD_LIB=${_ld_lib-$LD_LIB}
3584 LD_PATH=${_ld_path-$LD_PATH}
3585
3586 probe_cc hostld "$host_ld"
3587 host_ldflags_filter=$_flags_filter
3588 add_host_ldflags $_flags $_ldflags
3589 HOSTLD_O=${_ld_o-$HOSTLD_O}
3590
3591 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3592     probe_cc depcc "$dep_cc"
3593     CCDEP=${_DEPCMD:-$DEPCMD}
3594     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3595     DEPCCFLAGS=$_flags
3596 fi
3597
3598 if $ar 2>&1 | grep -q Microsoft; then
3599     arflags="-nologo"
3600     ar_o='-out:$@'
3601 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3602     arflags="rq"
3603     ar_o='$@'
3604 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3605     arflags='-Xany -r -c'
3606     ar_o='$@'
3607 elif $ar 2>&1 | grep -q "\[D\] "; then
3608     arflags="rcD"
3609     ar_o='$@'
3610 else
3611     arflags="rc"
3612     ar_o='$@'
3613 fi
3614
3615 add_cflags $extra_cflags
3616 add_cxxflags $extra_cxxflags
3617 add_asflags $extra_cflags
3618
3619 if test -n "$sysroot"; then
3620     case "$cc_type" in
3621         gcc|llvm_gcc|clang)
3622             add_cppflags --sysroot="$sysroot"
3623             add_ldflags --sysroot="$sysroot"
3624 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
3625             add_cppflags -isysroot "$sysroot"
3626             add_ldflags -isysroot "$sysroot"
3627         ;;
3628         tms470)
3629             add_cppflags -I"$sysinclude"
3630             add_ldflags  --sysroot="$sysroot"
3631         ;;
3632     esac
3633 fi
3634
3635 if test "$cpu" = host; then
3636     enabled cross_compile &&
3637         die "--cpu=host makes no sense when cross-compiling."
3638
3639     case "$cc_type" in
3640         gcc|llvm_gcc)
3641             check_native(){
3642                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3643                 sed -n "/cc1.*$1=/{
3644                             s/.*$1=\\([^ ]*\\).*/\\1/
3645                             p
3646                             q
3647                         }" $TMPE
3648             }
3649             cpu=$(check_native -march || check_native -mcpu)
3650         ;;
3651     esac
3652
3653     test "${cpu:-host}" = host &&
3654         die "--cpu=host not supported with compiler $cc"
3655 fi
3656
3657 # Deal with common $arch aliases
3658 case "$arch" in
3659     aarch64|arm64)
3660         arch="aarch64"
3661     ;;
3662     arm*|iPad*|iPhone*)
3663         arch="arm"
3664     ;;
3665     mips*|IP*)
3666         arch="mips"
3667     ;;
3668     parisc*|hppa*)
3669         arch="parisc"
3670     ;;
3671     "Power Macintosh"|ppc*|powerpc*)
3672         arch="ppc"
3673     ;;
3674     s390|s390x)
3675         arch="s390"
3676     ;;
3677     sh4|sh)
3678         arch="sh4"
3679     ;;
3680     sun4u|sparc*)
3681         arch="sparc"
3682     ;;
3683     tilegx|tile-gx)
3684         arch="tilegx"
3685     ;;
3686     i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3687         arch="x86"
3688     ;;
3689 esac
3690
3691 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3692 enable $arch
3693
3694 # Add processor-specific flags
3695 if enabled aarch64; then
3696
3697     case $cpu in
3698         armv*)
3699             cpuflags="-march=$cpu"
3700         ;;
3701         *)
3702             cpuflags="-mcpu=$cpu"
3703         ;;
3704     esac
3705
3706 elif enabled alpha; then
3707
3708     cpuflags="-mcpu=$cpu"
3709
3710 elif enabled arm; then
3711
3712     check_arm_arch() {
3713         check_cpp_condition stddef.h \
3714             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3715             $cpuflags
3716     }
3717
3718     probe_arm_arch() {
3719         if   check_arm_arch 4;        then echo armv4;
3720         elif check_arm_arch 4T;       then echo armv4t;
3721         elif check_arm_arch 5;        then echo armv5;
3722         elif check_arm_arch 5E;       then echo armv5e;
3723         elif check_arm_arch 5T;       then echo armv5t;
3724         elif check_arm_arch 5TE;      then echo armv5te;
3725         elif check_arm_arch 5TEJ;     then echo armv5te;
3726         elif check_arm_arch 6;        then echo armv6;
3727         elif check_arm_arch 6J;       then echo armv6j;
3728         elif check_arm_arch 6K;       then echo armv6k;
3729         elif check_arm_arch 6Z;       then echo armv6z;
3730         elif check_arm_arch 6ZK;      then echo armv6zk;
3731         elif check_arm_arch 6T2;      then echo armv6t2;
3732         elif check_arm_arch 7;        then echo armv7;
3733         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3734         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3735         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3736         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3737         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3738         fi
3739     }
3740
3741     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3742
3743     case $cpu in
3744         armv*)
3745             cpuflags="-march=$cpu"
3746             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3747         ;;
3748         *)
3749             cpuflags="-mcpu=$cpu"
3750             case $cpu in
3751                 cortex-a*)                               subarch=armv7a  ;;
3752                 cortex-r*)                               subarch=armv7r  ;;
3753                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3754                 arm11*)                                  subarch=armv6   ;;
3755                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3756                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3757                 *)                             subarch=$(probe_arm_arch) ;;
3758             esac
3759         ;;
3760     esac
3761
3762     case "$subarch" in
3763         armv5t*)    enable fast_clz                ;;
3764         armv[6-8]*)
3765             enable fast_clz
3766             disabled fast_unaligned || enable fast_unaligned
3767             ;;
3768     esac
3769
3770 elif enabled avr32; then
3771
3772     case $cpu in
3773         ap7[02]0[0-2])
3774             subarch="avr32_ap"
3775             cpuflags="-mpart=$cpu"
3776         ;;
3777         ap)
3778             subarch="avr32_ap"
3779             cpuflags="-march=$cpu"
3780         ;;
3781         uc3[ab]*)
3782             subarch="avr32_uc"
3783             cpuflags="-mcpu=$cpu"
3784         ;;
3785         uc)
3786             subarch="avr32_uc"
3787             cpuflags="-march=$cpu"
3788         ;;
3789     esac
3790
3791 elif enabled bfin; then
3792
3793     cpuflags="-mcpu=$cpu"
3794
3795 elif enabled mips; then
3796
3797     cpuflags="-march=$cpu"
3798
3799     case $cpu in
3800         24kc)
3801             disable mipsfpu
3802             disable mipsdspr1
3803             disable mipsdspr2
3804         ;;
3805         24kf*)
3806             disable mipsdspr1
3807             disable mipsdspr2
3808         ;;
3809         24kec|34kc|1004kc)
3810             disable mipsfpu
3811             disable mipsdspr2
3812         ;;
3813         24kef*|34kf*|1004kf*)
3814             disable mipsdspr2
3815         ;;
3816         74kc)
3817             disable mipsfpu
3818         ;;
3819     esac
3820
3821 elif enabled ppc; then
3822
3823     disable ldbrx
3824     disable vsx
3825
3826     case $(tolower $cpu) in
3827         601|ppc601|powerpc601)
3828             cpuflags="-mcpu=601"
3829             disable altivec
3830         ;;
3831         603*|ppc603*|powerpc603*)
3832             cpuflags="-mcpu=603"
3833             disable altivec
3834         ;;
3835         604*|ppc604*|powerpc604*)
3836             cpuflags="-mcpu=604"
3837             disable altivec
3838         ;;
3839         g3|75*|ppc75*|powerpc75*)
3840             cpuflags="-mcpu=750"
3841             disable altivec
3842         ;;
3843         g4|745*|ppc745*|powerpc745*)
3844             cpuflags="-mcpu=7450"
3845         ;;
3846         74*|ppc74*|powerpc74*)
3847             cpuflags="-mcpu=7400"
3848         ;;
3849         g5|970|ppc970|powerpc970)
3850             cpuflags="-mcpu=970"
3851         ;;
3852         power[3-8]*)
3853             cpuflags="-mcpu=$cpu"
3854         ;;
3855         cell)
3856             cpuflags="-mcpu=cell"
3857             enable ldbrx
3858         ;;
3859         e500mc)
3860             cpuflags="-mcpu=e500mc"
3861             disable altivec
3862         ;;
3863         e500v2)
3864             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3865             disable altivec
3866             disable dcbzl
3867         ;;
3868         e500)
3869             cpuflags="-mcpu=8540 -mhard-float"
3870             disable altivec
3871             disable dcbzl
3872         ;;
3873     esac
3874
3875 elif enabled sparc; then
3876
3877     case $cpu in
3878         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3879             cpuflags="-mcpu=$cpu"
3880         ;;
3881         ultrasparc*|niagara[234])
3882             cpuflags="-mcpu=$cpu"
3883         ;;
3884     esac
3885
3886 elif enabled x86; then
3887
3888     case $cpu in
3889         i[345]86|pentium)
3890             cpuflags="-march=$cpu"
3891             disable i686
3892             disable mmx
3893         ;;
3894         # targets that do NOT support nopl and conditional mov (cmov)
3895         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3896             cpuflags="-march=$cpu"
3897             disable i686
3898         ;;
3899         # targets that do support nopl and conditional mov (cmov)
3900         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
3901         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|amdfam10|barcelona|b[dt]ver*)
3902             cpuflags="-march=$cpu"
3903             enable i686
3904             enable fast_cmov
3905         ;;
3906         # targets that do support conditional mov but on which it's slow
3907         pentium4|pentium4m|prescott|nocona)
3908             cpuflags="-march=$cpu"
3909             enable i686
3910             disable fast_cmov
3911         ;;
3912     esac
3913
3914 fi
3915
3916 if [ "$cpu" != generic ]; then
3917     add_cflags  $cpuflags
3918     add_asflags $cpuflags
3919 fi
3920
3921 # compiler sanity check
3922 check_exec <<EOF
3923 int main(void){ return 0; }
3924 EOF
3925 if test "$?" != 0; then
3926     echo "$cc is unable to create an executable file."
3927     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3928         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3929         echo "Only do this if you know what cross compiling means."
3930     fi
3931     die "C compiler test failed."
3932 fi
3933
3934 add_cppflags -D_ISOC99_SOURCE
3935 add_cxxflags -D__STDC_CONSTANT_MACROS
3936 check_cflags -std=c99
3937 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3938 #include <stdlib.h>
3939 EOF
3940 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3941 #include <stdlib.h>
3942 EOF
3943
3944 add_host_cppflags -D_ISOC99_SOURCE
3945 check_host_cflags -std=c99
3946 check_host_cflags -Wall
3947 check_host_cflags -O3
3948
3949 check_64bit(){
3950     arch32=$1
3951     arch64=$2
3952     expr=$3
3953     check_code cc "" "int test[2*($expr) - 1]" &&
3954         subarch=$arch64 || subarch=$arch32
3955 }
3956
3957 case "$arch" in
3958     aarch64|alpha|ia64)
3959         spic=$shared
3960     ;;
3961     mips)
3962         check_64bit mips mips64 '_MIPS_SIM > 1'
3963         spic=$shared
3964     ;;
3965     parisc)
3966         check_64bit parisc parisc64 'sizeof(void *) > 4'
3967         spic=$shared
3968     ;;
3969     ppc)
3970         check_64bit ppc ppc64 'sizeof(void *) > 4'
3971         spic=$shared
3972     ;;
3973     s390)
3974         check_64bit s390 s390x 'sizeof(void *) > 4'
3975         spic=$shared
3976     ;;
3977     sparc)
3978         check_64bit sparc sparc64 'sizeof(void *) > 4'
3979         spic=$shared
3980     ;;
3981     x86)
3982         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3983         # Treat x32 as x64 for now. Note it also needs spic=$shared
3984         test "$subarch" = "x86_32" && check_cpp_condition stddef.h 'defined(__x86_64__)' &&
3985             subarch=x86_64
3986         if test "$subarch" = "x86_64"; then
3987             spic=$shared
3988         fi
3989     ;;
3990     ppc)
3991         check_cc <<EOF && subarch="ppc64"
3992         int test[(int)sizeof(char*) - 7];
3993 EOF
3994     ;;
3995 esac
3996
3997 enable $subarch
3998 enabled spic && enable_weak pic
3999
4000 # OS specific
4001 case $target_os in
4002     aix)
4003         SHFLAGS=-shared
4004         add_cppflags '-I\$(SRC_PATH)/compat/aix'
4005         enabled shared && add_ldflags -Wl,-brtl
4006         ;;
4007     android)
4008         disable symver
4009         enable section_data_rel_ro
4010         SLIB_INSTALL_NAME='$(SLIBNAME)'
4011         SLIB_INSTALL_LINKS=
4012         # soname not set on purpose
4013         SHFLAGS=-shared
4014         ;;
4015     haiku)
4016         prefix_default="/boot/common"
4017         network_extralibs="-lnetwork"
4018         host_libs=
4019         ;;
4020     sunos)
4021         SHFLAGS='-shared -Wl,-h,$$(@F)'
4022         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
4023         network_extralibs="-lsocket -lnsl"
4024         # When using suncc to build, the Solaris linker will mark
4025         # an executable with each instruction set encountered by
4026         # the Solaris assembler.  As our libraries contain their own
4027         # guards for processor-specific code, instead suppress
4028         # generation of the HWCAPS ELF section on Solaris x86 only.
4029         enabled_all suncc x86 &&
4030             echo "hwcap_1 = OVERRIDE;" > mapfile &&
4031             add_ldflags -Wl,-M,mapfile
4032         nm_default='nm -P -g'
4033         ;;
4034     netbsd)
4035         disable symver
4036         oss_indev_extralibs="-lossaudio"
4037         oss_outdev_extralibs="-lossaudio"
4038         enabled gcc || check_ldflags -Wl,-zmuldefs
4039         ;;
4040     openbsd|bitrig)
4041         disable symver
4042         SHFLAGS='-shared'
4043         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
4044         SLIB_INSTALL_LINKS=
4045         oss_indev_extralibs="-lossaudio"
4046         oss_outdev_extralibs="-lossaudio"
4047         ;;
4048     dragonfly)
4049         disable symver
4050         ;;
4051     freebsd)
4052         ;;
4053     bsd/os)
4054         add_extralibs -lpoll -lgnugetopt
4055         strip="strip -d"
4056         ;;
4057     darwin)
4058         enabled ppc && add_asflags -force_cpusubtype_ALL
4059         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
4060         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
4061         strip="${strip} -x"
4062         add_ldflags -Wl,-dynamic,-search_paths_first
4063         SLIBSUF=".dylib"
4064         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
4065         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
4066         objformat="macho"
4067         enabled x86_64 && objformat="macho64"
4068         enabled_any pic shared ||
4069             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
4070         ;;
4071     mingw32*)
4072         if test $target_os = "mingw32ce"; then
4073             disable network
4074         else
4075             target_os=mingw32
4076         fi
4077         LIBTARGET=i386
4078         if enabled x86_64; then
4079             LIBTARGET="i386:x86-64"
4080         elif enabled arm; then
4081             LIBTARGET=arm-wince
4082         fi
4083         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4084         check_ldflags -Wl,--nxcompat
4085         check_ldflags -Wl,--dynamicbase
4086         enabled x86_32 && check_ldflags -Wl,--large-address-aware
4087         shlibdir_default="$bindir_default"
4088         SLIBPREF=""
4089         SLIBSUF=".dll"
4090         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4091         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4092         dlltool="${cross_prefix}dlltool"
4093         if check_cmd lib.exe -list; then
4094             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4095             if enabled x86_64; then
4096                 LIBTARGET=x64
4097             fi
4098         elif check_cmd $dlltool --version; then
4099             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
4100         fi
4101         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4102         SLIB_INSTALL_LINKS=
4103         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4104         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4105         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
4106         objformat="win32"
4107         ranlib=:
4108         enable dos_paths
4109         ;;
4110     win32|win64)
4111         disable symver
4112         if enabled shared; then
4113             # Link to the import library instead of the normal static library
4114             # for shared libs.
4115             LD_LIB='%.lib'
4116             # Cannot build both shared and static libs with MSVC or icl.
4117             disable static
4118         fi
4119         enabled x86_32 && check_ldflags -LARGEADDRESSAWARE
4120         shlibdir_default="$bindir_default"
4121         SLIBPREF=""
4122         SLIBSUF=".dll"
4123         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4124         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4125         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4126         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4127         SLIB_INSTALL_LINKS=
4128         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4129         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4130         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4131         objformat="win32"
4132         ranlib=:
4133         enable dos_paths
4134         ;;
4135     cygwin*)
4136         target_os=cygwin
4137         shlibdir_default="$bindir_default"
4138         SLIBPREF="cyg"
4139         SLIBSUF=".dll"
4140         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
4141         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
4142         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4143         SLIB_INSTALL_LINKS=
4144         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
4145         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
4146         objformat="win32"
4147         enable dos_paths
4148         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
4149         ;;
4150     *-dos|freedos|opendos)
4151         network_extralibs="-lsocket"
4152         objformat="coff"
4153         enable dos_paths
4154         add_cppflags -U__STRICT_ANSI__
4155         ;;
4156     linux)
4157         enable dv1394
4158         enable section_data_rel_ro
4159         ;;
4160     irix*)
4161         target_os=irix
4162         ranlib="echo ignoring ranlib"
4163         ;;
4164     os/2*)
4165         strip="lxlite -CS"
4166         ln_s="cp -f"
4167         objformat="aout"
4168         add_cppflags -D_GNU_SOURCE
4169         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
4170         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4171         LIBSUF="_s.a"
4172         SLIBPREF=""
4173         SLIBSUF=".dll"
4174         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4175         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4176         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4177             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
4178             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4179             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4180             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4181             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
4182         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4183             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4184         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4185         enable dos_paths
4186         enable_weak os2threads
4187         ;;
4188     gnu/kfreebsd)
4189         add_cppflags -D_BSD_SOURCE
4190         ;;
4191     gnu)
4192         ;;
4193     qnx)
4194         add_cppflags -D_QNX_SOURCE
4195         network_extralibs="-lsocket"
4196         ;;
4197     symbian)
4198         SLIBSUF=".dll"
4199         enable dos_paths
4200         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4201         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4202         add_ldflags -Wl,--target1-abs,--no-undefined \
4203                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4204                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4205         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4206                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4207                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4208         ;;
4209     osf1)
4210         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4211         ;;
4212     minix)
4213         ;;
4214     plan9)
4215         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
4216                      -D_REENTRANT_SOURCE        \
4217                      -D_RESEARCH_SOURCE         \
4218                      -DFD_SETSIZE=96            \
4219                      -DHAVE_SOCK_OPTS
4220         add_compat strtod.o strtod=avpriv_strtod
4221         network_extralibs='-lbsd'
4222         exeobjs=compat/plan9/main.o
4223         disable ffserver
4224         cp_f='cp'
4225         ;;
4226     none)
4227         ;;
4228     *)
4229         die "Unknown OS '$target_os'."
4230         ;;
4231 esac
4232
4233 # determine libc flavour
4234
4235 probe_libc(){
4236     pfx=$1
4237     pfx_no_=${pfx%_}
4238     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4239     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4240         eval ${pfx}libc_type=uclibc
4241         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4242     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4243         eval ${pfx}libc_type=glibc
4244         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4245     # MinGW headers can be installed on Cygwin, so check for newlib first.
4246     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4247         eval ${pfx}libc_type=newlib
4248         add_${pfx}cppflags -U__STRICT_ANSI__
4249     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4250     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4251         eval ${pfx}libc_type=mingw64
4252         if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
4253             add_compat msvcrt/snprintf.o
4254             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
4255         fi
4256         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4257         eval test \$${pfx_no_}cc_type = "gcc" &&
4258             add_${pfx}cppflags -D__printf__=__gnu_printf__
4259     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4260          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4261         eval ${pfx}libc_type=mingw32
4262         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4263             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4264             die "ERROR: MinGW32 runtime version must be >= 3.15."
4265         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4266         eval test \$${pfx_no_}cc_type = "gcc" &&
4267             add_${pfx}cppflags -D__printf__=__gnu_printf__
4268     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4269         eval ${pfx}libc_type=msvcrt
4270         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4271         # 0x601 by default unless something else is set by the user.
4272         # This can easily lead to us detecting functions only present
4273         # in such new versions and producing binaries requiring windows 7.0.
4274         # Therefore explicitly set the default to XP unless the user has
4275         # set something else on the command line.
4276         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4277             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4278     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4279         eval ${pfx}libc_type=klibc
4280     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4281         eval ${pfx}libc_type=bionic
4282     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4283         eval ${pfx}libc_type=solaris
4284         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4285     fi
4286     check_${pfx}cc <<EOF
4287 #include <time.h>
4288 void *v = localtime_r;
4289 EOF
4290 test "$?" != 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
4291 #include <time.h>
4292 void *v = localtime_r;
4293 EOF
4294
4295 }
4296
4297 probe_libc
4298 test -n "$libc_type" && enable libc_$libc_type
4299 probe_libc host_
4300 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4301
4302 case $libc_type in
4303     bionic)
4304         add_compat strtod.o strtod=avpriv_strtod
4305         ;;
4306     msvcrt)
4307         add_compat strtod.o strtod=avpriv_strtod
4308         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4309                                      _snprintf=avpriv_snprintf  \
4310                                      vsnprintf=avpriv_vsnprintf
4311         ;;
4312 esac
4313
4314 # hacks for compiler/libc/os combinations
4315
4316 if enabled_all tms470 libc_glibc; then
4317     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4318     add_cppflags -D__USER_LABEL_PREFIX__=
4319     add_cppflags -D__builtin_memset=memset
4320     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4321     add_cflags   -pds=48    # incompatible redefinition of macro
4322 fi
4323
4324 if enabled_all ccc libc_glibc; then
4325     add_ldflags -Wl,-z,now  # calls to libots crash without this
4326 fi
4327
4328 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4329     add_cppflags '-I\$(SRC_PATH)/compat/float'
4330
4331 esc(){
4332     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4333 }
4334
4335 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
4336
4337 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4338
4339 set_default libdir
4340 : ${shlibdir_default:="$libdir"}
4341
4342 set_default $PATHS_LIST
4343 set_default nm
4344
4345 # we need to build at least one lib type
4346 if ! enabled_any static shared; then
4347     cat <<EOF
4348 At least one library type must be built.
4349 Specify --enable-static to build the static libraries or --enable-shared to
4350 build the shared libraries as well. To only build the shared libraries specify
4351 --disable-static in addition to --enable-shared.
4352 EOF
4353     exit 1;
4354 fi
4355
4356 die_license_disabled() {
4357     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4358 }
4359
4360 die_license_disabled_gpl() {
4361     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
4362 }
4363
4364 die_license_disabled gpl frei0r
4365 die_license_disabled gpl libcdio
4366 die_license_disabled gpl libsmbclient
4367 die_license_disabled gpl libutvideo
4368 die_license_disabled gpl libvidstab
4369 die_license_disabled gpl libx264
4370 die_license_disabled gpl libx265
4371 die_license_disabled gpl libxavs
4372 die_license_disabled gpl libxvid
4373 die_license_disabled gpl libzvbi
4374 die_license_disabled gpl x11grab
4375
4376 die_license_disabled nonfree libaacplus
4377 die_license_disabled nonfree libfaac
4378 die_license_disabled nonfree nvenc
4379 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
4380 enabled gpl && die_license_disabled_gpl nonfree openssl
4381
4382 die_license_disabled version3 libopencore_amrnb
4383 die_license_disabled version3 libopencore_amrwb
4384 die_license_disabled version3 libsmbclient
4385 die_license_disabled version3 libvo_aacenc
4386 die_license_disabled version3 libvo_amrwbenc
4387
4388 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4389
4390 disabled optimizations || check_cflags -fomit-frame-pointer
4391
4392 enable_weak_pic() {
4393     disabled pic && return
4394     enable pic
4395     add_cppflags -DPIC
4396     case "$target_os" in
4397     mingw*|cygwin*)
4398         ;;
4399     *)
4400         add_cflags -fPIC
4401         ;;
4402     esac
4403     add_asflags  -fPIC
4404 }
4405
4406 enabled pic && enable_weak_pic
4407
4408 check_cc <<EOF || die "Symbol mangling check failed."
4409 int ff_extern;
4410 EOF
4411 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4412 extern_prefix=${sym%%ff_extern*}
4413
4414 check_cc <<EOF && enable_weak inline_asm
4415 void foo(void) { __asm__ volatile ("" ::); }
4416 EOF
4417
4418 _restrict=
4419 for restrict_keyword in restrict __restrict__ __restrict; do
4420     check_cc <<EOF && _restrict=$restrict_keyword && break
4421 void foo(char * $restrict_keyword p);
4422 EOF
4423 done
4424
4425 check_cc <<EOF && enable pragma_deprecated
4426 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4427 EOF
4428
4429 check_cc <<EOF && enable attribute_packed
4430 struct { int x; } __attribute__((packed)) x;
4431 EOF
4432
4433 check_cc <<EOF && enable attribute_may_alias
4434 union { int x; } __attribute__((may_alias)) x;
4435 EOF
4436
4437 check_cc <<EOF || die "endian test failed"
4438 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4439 EOF
4440 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4441
4442 if  [ "$cpu" = "power7" ] || [ "$cpu" = "power8" ] || enabled ppc64; then
4443     if ! enabled bigendian && enabled altivec ;then
4444         enable vsx
4445     fi
4446 fi
4447
4448 check_gas() {
4449     log "check_gas using '$as' as AS"
4450     # :vararg is used on aarch64, arm and ppc altivec
4451     check_as <<EOF || return 1
4452 .macro m n, y:vararg=0
4453 \n: .int \y
4454 .endm
4455 m x
4456 EOF
4457     # .altmacro is only used in arm asm
4458     ! enabled arm || check_as <<EOF || return 1
4459 .altmacro
4460 EOF
4461     enable gnu_as
4462     return 0
4463 }
4464
4465 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4466     nogas=:
4467     enabled_any arm aarch64 && nogas=die
4468     enabled_all ppc altivec && [ $target_os_default != aix ] && nogas=warn
4469     as_noop=-v
4470
4471     case $as_type in
4472         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4473         gcc)  gaspp_as_type=gas ;;
4474         *)    gaspp_as_type=$as_type ;;
4475     esac
4476
4477     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4478
4479     test "${as#*gas-preprocessor.pl}" != "$as" ||
4480     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- ${as:=$cc} $as_noop &&
4481         gas="${gas:=gas-preprocessor.pl} -arch $arch -as-type $gaspp_as_type -- ${as:=$cc}"
4482
4483     if ! check_gas ; then
4484         as=${gas:=$as}
4485         check_gas || \
4486             $nogas "GNU assembler not found, install/update gas-preprocessor"
4487     fi
4488
4489     check_as <<EOF && enable as_func
4490 .func test
4491 .endfunc
4492 EOF
4493 fi
4494
4495 check_inline_asm inline_asm_labels '"1:\n"'
4496
4497 check_inline_asm inline_asm_nonlocal_labels '"Label:\n"'
4498
4499 if enabled aarch64; then
4500     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4501     # internal assembler in clang 3.3 does not support this instruction
4502     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4503     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4504
4505     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4506
4507 elif enabled alpha; then
4508
4509     check_cflags -mieee
4510
4511 elif enabled arm; then
4512
4513     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
4514 float func(float a, float b){ return a+b; }
4515 EOF
4516
4517     enabled thumb && check_cflags -mthumb || check_cflags -marm
4518
4519     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4520         enable vfp_args
4521     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
4522         case "${cross_prefix:-$cc}" in
4523             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4524             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4525 __asm__ (".eabi_attribute 28, 1");
4526 int main(void) { return 0; }
4527 EOF
4528         esac
4529         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4530     fi
4531
4532     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4533     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4534     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4535     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4536     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4537     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4538     enabled setend  && check_insn setend  'setend be'
4539
4540     [ $target_os = linux ] || [ $target_os = android ] ||
4541         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4542             $ARCH_EXT_LIST_ARM
4543
4544     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4545
4546     check_as <<EOF && enable as_dn_directive
4547 ra .dn d0.i16
4548 .unreq ra
4549 EOF
4550
4551     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4552
4553 elif enabled mips; then
4554
4555     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4556     enabled mips32r2  && add_cflags "-mips32r2" && add_asflags "-mips32r2" &&
4557      check_inline_asm mips32r2  '"rotr $t0, $t1, 1"'
4558     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
4559      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
4560     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
4561      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
4562     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
4563      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
4564
4565 elif enabled parisc; then
4566
4567     if enabled gcc; then
4568         case $($cc -dumpversion) in
4569             4.[3-9].*) check_cflags -fno-optimize-sibling-calls ;;
4570         esac
4571     fi
4572
4573 elif enabled ppc; then
4574
4575     enable local_aligned_8 local_aligned_16 local_aligned_32
4576
4577     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4578     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4579     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4580     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4581
4582     # AltiVec flags: The FSF version of GCC differs from the Apple version
4583     if enabled altivec; then
4584         check_cflags -maltivec -mabi=altivec &&
4585         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4586         check_cflags -faltivec
4587
4588         # check if our compiler supports Motorola AltiVec C API
4589         check_cc <<EOF || disable altivec
4590 $inc_altivec_h
4591 int main(void) {
4592     vector signed int v1 = (vector signed int) { 0 };
4593     vector signed int v2 = (vector signed int) { 1 };
4594     v1 = vec_add(v1, v2);
4595     return 0;
4596 }
4597 EOF
4598
4599         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4600     fi
4601
4602     if enabled vsx; then
4603         check_cflags -mvsx
4604     fi
4605 elif enabled x86; then
4606
4607     check_builtin rdtsc    intrin.h   "__rdtsc()"
4608     check_builtin mm_empty mmintrin.h "_mm_empty()"
4609
4610     enable local_aligned_8 local_aligned_16 local_aligned_32
4611
4612     # check whether EBP is available on x86
4613     # As 'i' is stored on the stack, this program will crash
4614     # if the base pointer is used to access it because the
4615     # base pointer is cleared in the inline assembly code.
4616     check_exec_crash <<EOF && enable ebp_available
4617 volatile int i=0;
4618 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4619 return i;
4620 EOF
4621
4622     # check whether EBX is available on x86
4623     check_inline_asm ebx_available '""::"b"(0)' &&
4624         check_inline_asm ebx_available '"":::"%ebx"'
4625
4626     # check whether xmm clobbers are supported
4627     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4628
4629     check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test, %eax"' ||
4630         check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test(%rip), %eax"'
4631
4632     # check whether binutils is new enough to compile SSSE3/MMXEXT
4633     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4634     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4635
4636     if ! disabled_any asm mmx yasm; then
4637         if check_cmd $yasmexe --version; then
4638             enabled x86_64 && yasm_extra="-m amd64"
4639             yasm_debug="-g dwarf2"
4640         elif check_cmd nasm -v; then
4641             yasmexe=nasm
4642             yasm_debug="-g -F dwarf"
4643             if enabled x86_64; then
4644                 case "$objformat" in
4645                     elf)   objformat=elf64 ;;
4646                     win32) objformat=win64 ;;
4647                 esac
4648             fi
4649         fi
4650
4651         YASMFLAGS="-f $objformat $yasm_extra"
4652         enabled pic               && append YASMFLAGS "-DPIC"
4653         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4654         case "$objformat" in
4655             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4656         esac
4657
4658         check_yasm "movbe ecx, [5]" && enable yasm ||
4659             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4660         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4661         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4662         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4663         check_yasm "CPU amdnop" || disable cpunop
4664     fi
4665
4666     case "$cpu" in
4667         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4668             disable fast_clz
4669         ;;
4670     esac
4671
4672 fi
4673
4674 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4675
4676 check_ldflags -Wl,--as-needed
4677 check_ldflags -Wl,-z,noexecstack
4678
4679 if check_func dlopen; then
4680     ldl=
4681 elif check_func dlopen -ldl; then
4682     ldl=-ldl
4683 fi
4684
4685 frei0r_filter_extralibs='$ldl'
4686 frei0r_src_filter_extralibs='$ldl'
4687 ladspa_filter_extralibs='$ldl'
4688 nvenc_encoder_extralibs='$ldl'
4689
4690 if ! disabled network; then
4691     check_func getaddrinfo $network_extralibs
4692     check_func getservbyport $network_extralibs
4693     check_func inet_aton $network_extralibs
4694
4695     check_type netdb.h "struct addrinfo"
4696     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4697     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4698     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4699     check_type poll.h "struct pollfd"
4700     check_type netinet/sctp.h "struct sctp_event_subscribe"
4701     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4702     check_type netinet/in.h "struct sockaddr_in6"
4703     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4704     check_type "sys/types.h sys/socket.h" socklen_t
4705
4706     # Prefer arpa/inet.h over winsock2
4707     if check_header arpa/inet.h ; then
4708         check_func closesocket
4709     elif check_header winsock2.h ; then
4710         check_func_headers winsock2.h closesocket -lws2 &&
4711             network_extralibs="-lws2" ||
4712         { check_func_headers winsock2.h closesocket -lws2_32 &&
4713             network_extralibs="-lws2_32"; } || disable winsock2_h network
4714         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4715
4716         check_type ws2tcpip.h socklen_t
4717         check_type ws2tcpip.h "struct addrinfo"
4718         check_type ws2tcpip.h "struct group_source_req"
4719         check_type ws2tcpip.h "struct ip_mreq_source"
4720         check_type ws2tcpip.h "struct ipv6_mreq"
4721         check_type winsock2.h "struct pollfd"
4722         check_struct winsock2.h "struct sockaddr" sa_len
4723         check_type ws2tcpip.h "struct sockaddr_in6"
4724         check_type ws2tcpip.h "struct sockaddr_storage"
4725     else
4726         disable network
4727     fi
4728 fi
4729
4730 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4731 check_builtin atomic_compare_exchange "" "int *ptr, *oldval; int newval; __atomic_compare_exchange_n(ptr, oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)"
4732 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4733 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4734 check_builtin sarestart signal.h "SA_RESTART"
4735 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4736
4737 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4738 check_func  ${malloc_prefix}memalign            && enable memalign
4739 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4740
4741 check_func  access
4742 check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4743 check_func  fcntl
4744 check_func  fork
4745 check_func  gethrtime
4746 check_func  getopt
4747 check_func  getrusage
4748 check_func  gettimeofday
4749 check_func  gmtime_r
4750 check_func  isatty
4751 check_func  localtime_r
4752 check_func  mach_absolute_time
4753 check_func  mkstemp
4754 check_func  mmap
4755 check_func  mprotect
4756 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4757 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4758 check_func  sched_getaffinity
4759 check_func  setrlimit
4760 check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE
4761 check_func  strerror_r
4762 check_func  sysconf
4763 check_func  sysctl
4764 check_func  usleep
4765
4766 check_func_headers conio.h kbhit
4767 check_func_headers io.h setmode
4768 check_func_headers lzo/lzo1x.h lzo1x_999_compress
4769 check_func_headers stdlib.h getenv
4770
4771 check_func_headers windows.h CoTaskMemFree -lole32
4772 check_func_headers windows.h GetProcessAffinityMask
4773 check_func_headers windows.h GetProcessTimes
4774 check_func_headers windows.h GetSystemTimeAsFileTime
4775 check_func_headers windows.h MapViewOfFile
4776 check_func_headers windows.h PeekNamedPipe
4777 check_func_headers windows.h SetConsoleTextAttribute
4778 check_func_headers windows.h Sleep
4779 check_func_headers windows.h VirtualAlloc
4780 check_struct windows.h "CONDITION_VARIABLE" Ptr
4781 check_func_headers glob.h glob
4782 enabled xlib &&
4783     check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
4784
4785 check_header direct.h
4786 check_header dlfcn.h
4787 check_header dxva.h
4788 check_header dxva2api.h -D_WIN32_WINNT=0x0600
4789 check_header io.h
4790 check_header libcrystalhd/libcrystalhd_if.h
4791 check_header mach/mach_time.h
4792 check_header malloc.h
4793 check_header net/udplite.h
4794 check_header poll.h
4795 check_header sys/mman.h
4796 check_header sys/param.h
4797 check_header sys/resource.h
4798 check_header sys/select.h
4799 check_header sys/time.h
4800 check_header sys/un.h
4801 check_header termios.h
4802 check_header unistd.h
4803 check_header vdpau/vdpau.h
4804 check_header vdpau/vdpau_x11.h
4805 check_header VideoDecodeAcceleration/VDADecoder.h
4806 check_header windows.h
4807 check_header X11/extensions/XvMClib.h
4808 check_header asm/types.h
4809
4810 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4811 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4812 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4813
4814 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4815
4816 if ! disabled w32threads && ! enabled pthreads; then
4817     check_func_headers "windows.h process.h" _beginthreadex &&
4818         enable w32threads || disable w32threads
4819 fi
4820
4821 # check for some common methods of building with pthread support
4822 # do this before the optional library checks as some of them require pthreads
4823 if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
4824     enable pthreads
4825     if check_func pthread_join -pthread && check_func pthread_create -pthread; then
4826         add_cflags -pthread
4827         add_extralibs -pthread
4828     elif check_func pthread_join -pthreads && check_func pthread_create -pthreads; then
4829         add_cflags -pthreads
4830         add_extralibs -pthreads
4831     elif check_func pthread_join -ldl -pthread && check_func pthread_create -ldl -pthread; then
4832         add_cflags -ldl -pthread