Merge commit '0338c396987c82b41d322630ea9712fe5f9561d6'
[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 [PREFIX/lib]
88   --incdir=DIR             install includes in DIR [PREFIX/include]
89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
90
91 Licensing options:
92   --enable-gpl             allow use of GPL code, the resulting libs
93                            and binaries will be under GPL [no]
94   --enable-version3        upgrade (L)GPL to version 3 [no]
95   --enable-nonfree         allow use of nonfree code, the resulting libs
96                            and binaries will be unredistributable [no]
97
98 Configuration options:
99   --disable-static         do not build static libraries [no]
100   --enable-shared          build shared libraries [no]
101   --enable-small           optimize for size instead of speed
102   --disable-runtime-cpudetect disable detecting cpu capabilities at runtime (smaller binary)
103   --enable-gray            enable full grayscale support (slower color)
104   --disable-swscale-alpha  disable alpha channel support in swscale
105   --disable-all            disable building components, libraries and programs
106   --enable-incompatible-libav-abi enable incompatible Libav fork ABI [no]
107   --enable-incompatible-fork-abi  enable incompatible Libav fork ABI (deprecated) [no]
108
109 Program options:
110   --disable-programs       do not build command line programs
111   --disable-ffmpeg         disable ffmpeg build
112   --disable-ffplay         disable ffplay build
113   --disable-ffprobe        disable ffprobe build
114   --disable-ffserver       disable ffserver build
115
116 Documentation options:
117   --disable-doc            do not build documentation
118   --disable-htmlpages      do not build HTML documentation pages
119   --disable-manpages       do not build man documentation pages
120   --disable-podpages       do not build POD documentation pages
121   --disable-txtpages       do not build text documentation pages
122
123 Component options:
124   --disable-avdevice       disable libavdevice build
125   --disable-avcodec        disable libavcodec build
126   --disable-avformat       disable libavformat build
127   --disable-avutil         disable libavutil build
128   --disable-swresample     disable libswresample build
129   --disable-swscale        disable libswscale build
130   --disable-postproc       disable libpostproc build
131   --disable-avfilter       disable libavfilter build
132   --enable-avresample      enable libavresample build [no]
133   --disable-pthreads       disable pthreads [auto]
134   --disable-w32threads     disable Win32 threads [auto]
135   --disable-os2threads     disable OS/2 threads [auto]
136   --disable-network        disable network support [no]
137   --disable-dct            disable DCT code
138   --disable-dwt            disable DWT code
139   --disable-error-resilience disable error resilience code
140   --disable-lsp            disable LSP code
141   --disable-lzo            disable LZO decoder code
142   --disable-mdct           disable MDCT code
143   --disable-rdft           disable RDFT code
144   --disable-fft            disable FFT code
145
146 Hardware accelerators:
147   --disable-dxva2          disable DXVA2 code [autodetect]
148   --disable-vaapi          disable VAAPI code [autodetect]
149   --enable-vda             enable VDA code
150   --disable-vdpau          disable VDPAU code [autodetect]
151
152 Individual component options:
153   --disable-everything     disable all components listed below
154   --disable-encoder=NAME   disable encoder NAME
155   --enable-encoder=NAME    enable encoder NAME
156   --disable-encoders       disable all encoders
157   --disable-decoder=NAME   disable decoder NAME
158   --enable-decoder=NAME    enable decoder NAME
159   --disable-decoders       disable all decoders
160   --disable-hwaccel=NAME   disable hwaccel NAME
161   --enable-hwaccel=NAME    enable hwaccel NAME
162   --disable-hwaccels       disable all hwaccels
163   --disable-muxer=NAME     disable muxer NAME
164   --enable-muxer=NAME      enable muxer NAME
165   --disable-muxers         disable all muxers
166   --disable-demuxer=NAME   disable demuxer NAME
167   --enable-demuxer=NAME    enable demuxer NAME
168   --disable-demuxers       disable all demuxers
169   --enable-parser=NAME     enable parser NAME
170   --disable-parser=NAME    disable parser NAME
171   --disable-parsers        disable all parsers
172   --enable-bsf=NAME        enable bitstream filter NAME
173   --disable-bsf=NAME       disable bitstream filter NAME
174   --disable-bsfs           disable all bitstream filters
175   --enable-protocol=NAME   enable protocol NAME
176   --disable-protocol=NAME  disable protocol NAME
177   --disable-protocols      disable all protocols
178   --enable-indev=NAME      enable input device NAME
179   --disable-indev=NAME     disable input device NAME
180   --disable-indevs         disable input devices
181   --enable-outdev=NAME     enable output device NAME
182   --disable-outdev=NAME    disable output device NAME
183   --disable-outdevs        disable output devices
184   --disable-devices        disable all devices
185   --enable-filter=NAME     enable filter NAME
186   --disable-filter=NAME    disable filter NAME
187   --disable-filters        disable all filters
188
189 External library support:
190   --enable-avisynth        enable reading of AviSynth script files [no]
191   --disable-bzlib          disable bzlib [autodetect]
192   --enable-fontconfig      enable fontconfig
193   --enable-frei0r          enable frei0r video filtering
194   --enable-gnutls          enable gnutls [no]
195   --disable-iconv          disable iconv [autodetect]
196   --enable-ladspa          enable LADSPA audio filtering
197   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
198   --enable-libass          enable libass subtitles rendering [no]
199   --enable-libbluray       enable BluRay reading using libbluray [no]
200   --enable-libcaca         enable textual display using libcaca
201   --enable-libcelt         enable CELT decoding via libcelt [no]
202   --enable-libcdio         enable audio CD grabbing with libcdio
203   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
204                            and libraw1394 [no]
205   --enable-libfaac         enable AAC encoding via libfaac [no]
206   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
207   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
208   --enable-libfreetype     enable libfreetype [no]
209   --enable-libgme          enable Game Music Emu via libgme [no]
210   --enable-libgsm          enable GSM de/encoding via libgsm [no]
211   --enable-libiec61883     enable iec61883 via libiec61883 [no]
212   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
213   --enable-libmodplug      enable ModPlug via libmodplug [no]
214   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
215   --enable-libnut          enable NUT (de)muxing via libnut,
216                            native (de)muxer exists [no]
217   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
218   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
219   --enable-libopencv       enable video filtering via libopencv [no]
220   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
221   --enable-libopus         enable Opus decoding via libopus [no]
222   --enable-libpulse        enable Pulseaudio input via libpulse [no]
223   --enable-libquvi         enable quvi input via libquvi [no]
224   --enable-librtmp         enable RTMP[E] support via librtmp [no]
225   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
226   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
227   --enable-libsoxr         enable Include libsoxr resampling [no]
228   --enable-libspeex        enable Speex de/encoding via libspeex [no]
229   --enable-libssh          enable SFTP protocol via libssh [no]
230   --enable-libstagefright-h264  enable H.264 decoding via libstagefright [no]
231   --enable-libtheora       enable Theora encoding via libtheora [no]
232   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
233   --enable-libutvideo      enable Ut Video encoding and decoding via libutvideo [no]
234   --enable-libv4l2         enable libv4l2/v4l-utils [no]
235   --enable-libvidstab      enable video stabilization using vid.stab [no]
236   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
237   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
238   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
239                            native implementation exists [no]
240   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
241   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
242   --enable-libx264         enable H.264 encoding via x264 [no]
243   --enable-libxavs         enable AVS encoding via xavs [no]
244   --enable-libxvid         enable Xvid encoding via xvidcore,
245                            native MPEG-4/Xvid encoder exists [no]
246   --enable-libzmq          enable message passing via libzmq [no]
247   --enable-libzvbi         enable teletext support via libzvbi [no]
248   --enable-openal          enable OpenAL 1.1 capture support [no]
249   --enable-opencl          enable OpenCL code
250   --enable-openssl         enable openssl [no]
251   --enable-x11grab         enable X11 grabbing [no]
252   --disable-zlib           disable zlib [autodetect]
253
254 Advanced options (experts only):
255   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
256   --enable-cross-compile   assume a cross-compiler is used
257   --sysroot=PATH           root of cross-build tree
258   --sysinclude=PATH        location of cross-build system headers
259   --target-os=OS           compiler targets OS [$target_os]
260   --target-exec=CMD        command to run executables on target
261   --target-path=DIR        path to view of build directory on target
262   --target-samples=DIR     path to samples directory on target
263   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
264   --toolchain=NAME         set tool defaults according to NAME
265   --nm=NM                  use nm tool NM [$nm_default]
266   --ar=AR                  use archive tool AR [$ar_default]
267   --as=AS                  use assembler AS [$as_default]
268   --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]
269   --cc=CC                  use C compiler CC [$cc_default]
270   --cxx=CXX                use C compiler CXX [$cxx_default]
271   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
272   --ld=LD                  use linker LD [$ld_default]
273   --host-cc=HOSTCC         use host C compiler HOSTCC
274   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
275   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
276   --host-ld=HOSTLD         use host linker HOSTLD
277   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
278   --host-libs=HLIBS        use libs HLIBS when linking for host
279   --host-os=OS             compiler host OS [$target_os]
280   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
281   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
282   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
283   --extra-libs=ELIBS       add ELIBS [$ELIBS]
284   --extra-version=STRING   version string suffix []
285   --optflags=OPTFLAGS      override optimization-related compiler flags
286   --build-suffix=SUFFIX    library name suffix []
287   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
288   --progs-suffix=SUFFIX    program name suffix []
289   --arch=ARCH              select architecture [$arch]
290   --cpu=CPU                select the minimum required CPU (affects
291                            instruction selection, may crash on older CPUs)
292   --enable-pic             build position-independent code
293   --enable-sram            allow use of on-chip SRAM
294   --enable-thumb           compile for Thumb instruction set
295   --disable-symver         disable symbol versioning
296   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
297   --disable-safe-bitstream-reader
298                            disable buffer boundary checking in bitreaders
299                            (faster, but may crash)
300   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
301   --enable-lto             use link-time optimization
302
303 Optimization options (experts only):
304   --disable-asm            disable all assembler optimizations
305   --disable-altivec        disable AltiVec optimizations
306   --disable-amd3dnow       disable 3DNow! optimizations
307   --disable-amd3dnowext    disable 3DNow! extended optimizations
308   --disable-mmx            disable MMX optimizations
309   --disable-mmxext         disable MMXEXT optimizations
310   --disable-sse            disable SSE optimizations
311   --disable-sse2           disable SSE2 optimizations
312   --disable-sse3           disable SSE3 optimizations
313   --disable-ssse3          disable SSSE3 optimizations
314   --disable-sse4           disable SSE4 optimizations
315   --disable-sse42          disable SSE4.2 optimizations
316   --disable-avx            disable AVX optimizations
317   --disable-fma4           disable FMA4 optimizations
318   --disable-avx2           disable AVX2 optimizations
319   --disable-armv5te        disable armv5te optimizations
320   --disable-armv6          disable armv6 optimizations
321   --disable-armv6t2        disable armv6t2 optimizations
322   --disable-vfp            disable VFP optimizations
323   --disable-neon           disable NEON optimizations
324   --disable-vis            disable VIS optimizations
325   --disable-inline-asm     disable use of inline assembler
326   --disable-yasm           disable use of yasm assembler
327   --disable-mips32r2       disable MIPS32R2 optimizations
328   --disable-mipsdspr1      disable MIPS DSP ASE R1 optimizations
329   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
330   --disable-mipsfpu        disable floating point MIPS optimizations
331   --disable-fast-unaligned consider unaligned accesses slow
332
333 Developer options (useful when working on FFmpeg itself):
334   --disable-debug          disable debugging symbols
335   --enable-debug=LEVEL     set the debug level [$debuglevel]
336   --disable-optimizations  disable compiler optimizations
337   --enable-extra-warnings  enable more compiler warnings
338   --disable-stripping      disable stripping of executables and shared libraries
339   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
340                            2 causes a slowdown at runtime.
341   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
342   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
343                            leaks and errors, using the specified valgrind binary.
344                            Cannot be combined with --target-exec
345   --enable-ftrapv          Trap arithmetic overflows
346   --samples=PATH           location of test samples for FATE, if not set use
347                            \$FATE_SAMPLES at make invocation time.
348   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
349                            should be used only for debugging purposes)
350   --enable-random          randomly enable/disable components
351   --disable-random
352   --enable-random=LIST     randomly enable/disable specific components or
353   --disable-random=LIST    component groups. LIST is a comma-separated list
354                            of NAME[:PROB] entries where NAME is a component
355                            (group) and PROB the probability associated with
356                            NAME (default 0.5).
357   --random-seed=VALUE      seed value for --enable/disable-random
358
359 NOTE: Object files are built at the place where configure is launched.
360 EOF
361   exit 0
362 }
363
364 quotes='""'
365
366 log(){
367     echo "$@" >> $logfile
368 }
369
370 log_file(){
371     log BEGIN $1
372     pr -n -t $1 >> $logfile
373     log END $1
374 }
375
376 echolog(){
377     log "$@"
378     echo "$@"
379 }
380
381 warn(){
382     log "WARNING: $*"
383     WARNINGS="${WARNINGS}WARNING: $*\n"
384 }
385
386 die(){
387     echolog "$@"
388     cat <<EOF
389
390 If you think configure made a mistake, make sure you are using the latest
391 version from Git.  If the latest version fails, report the problem to the
392 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
393 EOF
394     if disabled logging; then
395         cat <<EOF
396 Rerun configure with logging enabled (do not use --disable-logging), and
397 include the log this produces with your report.
398 EOF
399     else
400         cat <<EOF
401 Include the log file "$logfile" produced by configure as this will help
402 solving the problem.
403 EOF
404     fi
405     exit 1
406 }
407
408 # Avoid locale weirdness, besides we really just want to translate ASCII.
409 toupper(){
410     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
411 }
412
413 tolower(){
414     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
415 }
416
417 c_escape(){
418     echo "$*" | sed 's/["\\]/\\\0/g'
419 }
420
421 sh_quote(){
422     v=$(echo "$1" | sed "s/'/'\\\\''/g")
423     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
424     echo "$v"
425 }
426
427 cleanws(){
428     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//;s/\r//g'
429 }
430
431 filter(){
432     pat=$1
433     shift
434     for v; do
435         eval "case $v in $pat) echo $v ;; esac"
436     done
437 }
438
439 filter_out(){
440     pat=$1
441     shift
442     for v; do
443         eval "case $v in $pat) ;; *) echo $v ;; esac"
444     done
445 }
446
447 map(){
448     m=$1
449     shift
450     for v; do eval $m; done
451 }
452
453 add_suffix(){
454     suffix=$1
455     shift
456     for v; do echo ${v}${suffix}; done
457 }
458
459 set_all(){
460     value=$1
461     shift
462     for var in $*; do
463         eval $var=$value
464     done
465 }
466
467 set_weak(){
468     value=$1
469     shift
470     for var; do
471         eval : \${$var:=$value}
472     done
473 }
474
475 sanitize_var_name(){
476     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
477 }
478
479 set_safe(){
480     var=$1
481     shift
482     eval $(sanitize_var_name "$var")='$*'
483 }
484
485 get_safe(){
486     eval echo \$$(sanitize_var_name "$1")
487 }
488
489 pushvar(){
490     for pvar in $*; do
491         eval level=\${${pvar}_level:=0}
492         eval ${pvar}_${level}="\$$pvar"
493         eval ${pvar}_level=$(($level+1))
494     done
495 }
496
497 popvar(){
498     for pvar in $*; do
499         eval level=\${${pvar}_level:-0}
500         test $level = 0 && continue
501         eval level=$(($level-1))
502         eval $pvar="\${${pvar}_${level}}"
503         eval ${pvar}_level=$level
504         eval unset ${pvar}_${level}
505     done
506 }
507
508 enable(){
509     set_all yes $*
510 }
511
512 disable(){
513     set_all no $*
514 }
515
516 enable_weak(){
517     set_weak yes $*
518 }
519
520 disable_weak(){
521     set_weak no $*
522 }
523
524 enable_safe(){
525     for var; do
526         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
527     done
528 }
529
530 disable_safe(){
531     for var; do
532         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
533     done
534 }
535
536 do_enable_deep(){
537     for var; do
538         enabled $var && continue
539         eval sel="\$${var}_select"
540         eval sgs="\$${var}_suggest"
541         pushvar var sgs
542         enable_deep $sel
543         popvar sgs
544         enable_deep_weak $sgs
545         popvar var
546     done
547 }
548
549 enable_deep(){
550     do_enable_deep $*
551     enable $*
552 }
553
554 enable_deep_weak(){
555     for var; do
556         disabled $var && continue
557         pushvar var
558         do_enable_deep $var
559         popvar var
560         enable_weak $var
561     done
562 }
563
564 enabled(){
565     test "${1#!}" = "$1" && op== || op=!=
566     eval test "x\$${1#!}" $op "xyes"
567 }
568
569 disabled(){
570     test "${1#!}" = "$1" && op== || op=!=
571     eval test "x\$${1#!}" $op "xno"
572 }
573
574 enabled_all(){
575     for opt; do
576         enabled $opt || return 1
577     done
578 }
579
580 disabled_all(){
581     for opt; do
582         disabled $opt || return 1
583     done
584 }
585
586 enabled_any(){
587     for opt; do
588         enabled $opt && return 0
589     done
590 }
591
592 disabled_any(){
593     for opt; do
594         disabled $opt && return 0
595     done
596     return 1
597 }
598
599 set_default(){
600     for opt; do
601         eval : \${$opt:=\$${opt}_default}
602     done
603 }
604
605 is_in(){
606     value=$1
607     shift
608     for var in $*; do
609         [ $var = $value ] && return 0
610     done
611     return 1
612 }
613
614 do_check_deps(){
615     for cfg; do
616         cfg="${cfg#!}"
617         enabled ${cfg}_checking && die "Circular dependency for $cfg."
618         disabled ${cfg}_checking && continue
619         enable ${cfg}_checking
620         append allopts $cfg
621
622         eval dep_all="\$${cfg}_deps"
623         eval dep_any="\$${cfg}_deps_any"
624         eval dep_sel="\$${cfg}_select"
625         eval dep_sgs="\$${cfg}_suggest"
626         eval dep_ifa="\$${cfg}_if"
627         eval dep_ifn="\$${cfg}_if_any"
628
629         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
630         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
631         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
632
633         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
634         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
635         enabled_all  $dep_all || disable $cfg
636         enabled_any  $dep_any || disable $cfg
637         disabled_any $dep_sel && disable $cfg
638
639         if enabled $cfg; then
640             enable_deep $dep_sel
641             enable_deep_weak $dep_sgs
642         fi
643
644         disable ${cfg}_checking
645     done
646 }
647
648 check_deps(){
649     unset allopts
650
651     do_check_deps "$@"
652
653     for cfg in $allopts; do
654         enabled $cfg || continue
655         eval dep_extralibs="\$${cfg}_extralibs"
656         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
657     done
658 }
659
660 print_config(){
661     pfx=$1
662     files=$2
663     shift 2
664     map 'eval echo "$v \${$v:-no}"' "$@" |
665     awk "BEGIN { split(\"$files\", files) }
666         {
667             c = \"$pfx\" toupper(\$1);
668             v = \$2;
669             sub(/yes/, 1, v);
670             sub(/no/,  0, v);
671             for (f in files) {
672                 file = files[f];
673                 if (file ~ /\\.h\$/) {
674                     printf(\"#define %s %d\\n\", c, v) >>file;
675                 } else if (file ~ /\\.asm\$/) {
676                     printf(\"%%define %s %d\\n\", c, v) >>file;
677                 } else if (file ~ /\\.mak\$/) {
678                     n = -v ? \"\" : \"!\";
679                     printf(\"%s%s=yes\\n\", n, c) >>file;
680                 } else if (file ~ /\\.texi\$/) {
681                     pre = -v ? \"\" : \"@c \";
682                     yesno = \$2;
683                     c2 = tolower(c);
684                     gsub(/_/, \"-\", c2);
685                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
686                 }
687             }
688         }"
689 }
690
691 print_enabled(){
692     suf=$1
693     shift
694     for v; do
695         enabled $v && printf "%s\n" ${v%$suf};
696     done
697 }
698
699 append(){
700     var=$1
701     shift
702     eval "$var=\"\$$var $*\""
703 }
704
705 prepend(){
706     var=$1
707     shift
708     eval "$var=\"$* \$$var\""
709 }
710
711 add_cppflags(){
712     append CPPFLAGS "$@"
713 }
714
715 add_cflags(){
716     append CFLAGS $($cflags_filter "$@")
717 }
718
719 add_cxxflags(){
720     append CXXFLAGS $($cflags_filter "$@")
721 }
722
723 add_asflags(){
724     append ASFLAGS $($asflags_filter "$@")
725 }
726
727 add_ldflags(){
728     append LDFLAGS $($ldflags_filter "$@")
729 }
730
731 add_extralibs(){
732     prepend extralibs $($ldflags_filter "$@")
733 }
734
735 add_host_cppflags(){
736     append host_cppflags "$@"
737 }
738
739 add_host_cflags(){
740     append host_cflags $($host_cflags_filter "$@")
741 }
742
743 add_host_ldflags(){
744     append host_ldflags $($host_ldflags_filter "$@")
745 }
746
747 add_compat(){
748     append compat_objs $1
749     shift
750     map 'add_cppflags -D$v' "$@"
751 }
752
753 check_cmd(){
754     log "$@"
755     "$@" >> $logfile 2>&1
756 }
757
758 cc_o(){
759     eval printf '%s\\n' $CC_O
760 }
761
762 cc_e(){
763     eval printf '%s\\n' $CC_E
764 }
765
766 check_cc(){
767     log check_cc "$@"
768     cat > $TMPC
769     log_file $TMPC
770     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
771 }
772
773 check_cxx(){
774     log check_cxx "$@"
775     cat > $TMPCPP
776     log_file $TMPCPP
777     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
778 }
779
780 check_cpp(){
781     log check_cpp "$@"
782     cat > $TMPC
783     log_file $TMPC
784     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
785 }
786
787 as_o(){
788     eval printf '%s\\n' $AS_O
789 }
790
791 check_as(){
792     log check_as "$@"
793     cat > $TMPS
794     log_file $TMPS
795     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
796 }
797
798 check_inline_asm(){
799     log check_inline_asm "$@"
800     name="$1"
801     code="$2"
802     shift 2
803     disable $name
804     check_cc "$@" <<EOF && enable $name
805 void foo(void){ __asm__ volatile($code); }
806 EOF
807 }
808
809 check_insn(){
810     log check_insn "$@"
811     check_inline_asm ${1}_inline "\"$2\""
812     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
813 }
814
815 check_yasm(){
816     log check_yasm "$@"
817     echo "$1" > $TMPS
818     log_file $TMPS
819     shift 1
820     check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS
821 }
822
823 ld_o(){
824     eval printf '%s\\n' $LD_O
825 }
826
827 check_ld(){
828     log check_ld "$@"
829     type=$1
830     shift 1
831     flags=$(filter_out '-l*|*.so' $@)
832     libs=$(filter '-l*|*.so' $@)
833     check_$type $($cflags_filter $flags) || return
834     flags=$($ldflags_filter $flags)
835     libs=$($ldflags_filter $libs)
836     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
837 }
838
839 check_code(){
840     log check_code "$@"
841     check=$1
842     headers=$2
843     code=$3
844     shift 3
845     {
846         for hdr in $headers; do
847             echo "#include <$hdr>"
848         done
849         echo "int main(void) { $code; return 0; }"
850     } | check_$check "$@"
851 }
852
853 check_cppflags(){
854     log check_cppflags "$@"
855     check_cc "$@" <<EOF && append CPPFLAGS "$@"
856 int x;
857 EOF
858 }
859
860 test_cflags(){
861     log test_cflags "$@"
862     set -- $($cflags_filter "$@")
863     check_cc "$@" <<EOF
864 int x;
865 EOF
866 }
867
868 check_cflags(){
869     log check_cflags "$@"
870     test_cflags "$@" && add_cflags "$@"
871 }
872
873 check_cxxflags(){
874     log check_cxxflags "$@"
875     set -- $($cflags_filter "$@")
876     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
877 int x;
878 EOF
879 }
880
881 test_ldflags(){
882     log test_ldflags "$@"
883     check_ld "cc" "$@" <<EOF
884 int main(void){ return 0; }
885 EOF
886 }
887
888 check_ldflags(){
889     log check_ldflags "$@"
890     test_ldflags "$@" && add_ldflags "$@"
891 }
892
893 check_header(){
894     log check_header "$@"
895     header=$1
896     shift
897     disable_safe $header
898     check_cpp "$@" <<EOF && enable_safe $header
899 #include <$header>
900 int x;
901 EOF
902 }
903
904 check_func(){
905     log check_func "$@"
906     func=$1
907     shift
908     disable $func
909     check_ld "cc" "$@" <<EOF && enable $func
910 extern int $func();
911 int main(void){ $func(); }
912 EOF
913 }
914
915 check_mathfunc(){
916     log check_mathfunc "$@"
917     func=$1
918     narg=$2
919     shift 2
920     test $narg = 2 && args="f, g" || args="f"
921     disable $func
922     check_ld "cc" "$@" <<EOF && enable $func
923 #include <math.h>
924 float foo(float f, float g) { return $func($args); }
925 int main(void){ return (int) foo; }
926 EOF
927 }
928
929 check_func_headers(){
930     log check_func_headers "$@"
931     headers=$1
932     funcs=$2
933     shift 2
934     {
935         for hdr in $headers; do
936             echo "#include <$hdr>"
937         done
938         for func in $funcs; do
939             echo "long check_$func(void) { return (long) $func; }"
940         done
941         echo "int main(void) { return 0; }"
942     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
943 }
944
945 check_class_headers_cpp(){
946     log check_class_headers_cpp "$@"
947     headers=$1
948     classes=$2
949     shift 2
950     {
951         for hdr in $headers; do
952             echo "#include <$hdr>"
953         done
954         echo "int main(void) { "
955         i=1
956         for class in $classes; do
957             echo "$class obj$i;"
958             i=$(expr $i + 1)
959         done
960         echo "return 0; }"
961     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
962 }
963
964 check_cpp_condition(){
965     log check_cpp_condition "$@"
966     header=$1
967     condition=$2
968     shift 2
969     check_cpp "$@" <<EOF
970 #include <$header>
971 #if !($condition)
972 #error "unsatisfied condition: $condition"
973 #endif
974 EOF
975 }
976
977 check_lib(){
978     log check_lib "$@"
979     header="$1"
980     func="$2"
981     shift 2
982     check_header $header && check_func $func "$@" && add_extralibs "$@"
983 }
984
985 check_lib2(){
986     log check_lib2 "$@"
987     headers="$1"
988     funcs="$2"
989     shift 2
990     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
991 }
992
993 check_lib_cpp(){
994     log check_lib_cpp "$@"
995     headers="$1"
996     classes="$2"
997     shift 2
998     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
999 }
1000
1001 check_pkg_config(){
1002     log check_pkg_config "$@"
1003     pkg="$1"
1004     headers="$2"
1005     funcs="$3"
1006     shift 3
1007     check_cmd $pkg_config --exists --print-errors $pkg || return
1008     pkg_cflags=$($pkg_config --cflags $pkg)
1009     pkg_libs=$($pkg_config --libs $pkg)
1010     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1011         set_safe ${pkg}_cflags $pkg_cflags   &&
1012         set_safe ${pkg}_libs   $pkg_libs
1013 }
1014
1015 check_exec(){
1016     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1017 }
1018
1019 check_exec_crash(){
1020     code=$(cat)
1021
1022     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1023     # are safe but may not be available everywhere.  Thus we use
1024     # raise(SIGTERM) instead.  The check is run in a subshell so we
1025     # can redirect the "Terminated" message from the shell.  SIGBUS
1026     # is not defined by standard C so it is used conditionally.
1027
1028     (check_exec "$@") >> $logfile 2>&1 <<EOF
1029 #include <signal.h>
1030 static void sighandler(int sig){
1031     raise(SIGTERM);
1032 }
1033 int foo(void){
1034     $code
1035 }
1036 int (*func_ptr)(void) = foo;
1037 int main(void){
1038     signal(SIGILL, sighandler);
1039     signal(SIGFPE, sighandler);
1040     signal(SIGSEGV, sighandler);
1041 #ifdef SIGBUS
1042     signal(SIGBUS, sighandler);
1043 #endif
1044     return func_ptr();
1045 }
1046 EOF
1047 }
1048
1049 check_type(){
1050     log check_type "$@"
1051     headers=$1
1052     type=$2
1053     shift 2
1054     disable_safe "$type"
1055     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1056 }
1057
1058 check_struct(){
1059     log check_struct "$@"
1060     headers=$1
1061     struct=$2
1062     member=$3
1063     shift 3
1064     disable_safe "${struct}_${member}"
1065     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1066         enable_safe "${struct}_${member}"
1067 }
1068
1069 check_builtin(){
1070     log check_builtin "$@"
1071     name=$1
1072     headers=$2
1073     builtin=$3
1074     shift 3
1075     disable "$name"
1076     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1077 }
1078
1079 require(){
1080     name="$1"
1081     header="$2"
1082     func="$3"
1083     shift 3
1084     check_lib $header $func "$@" || die "ERROR: $name not found"
1085 }
1086
1087 require2(){
1088     name="$1"
1089     headers="$2"
1090     func="$3"
1091     shift 3
1092     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1093 }
1094
1095 require_cpp(){
1096     name="$1"
1097     headers="$2"
1098     classes="$3"
1099     shift 3
1100     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1101 }
1102
1103 require_pkg_config(){
1104     pkg="$1"
1105     check_pkg_config "$@" || die "ERROR: $pkg not found"
1106     add_cflags    $(get_safe ${pkg}_cflags)
1107     add_extralibs $(get_safe ${pkg}_libs)
1108 }
1109
1110 hostcc_o(){
1111     eval printf '%s\\n' $HOSTCC_O
1112 }
1113
1114 check_host_cc(){
1115     log check_host_cc "$@"
1116     cat > $TMPC
1117     log_file $TMPC
1118     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1119 }
1120
1121 check_host_cppflags(){
1122     log check_host_cppflags "$@"
1123     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1124 int x;
1125 EOF
1126 }
1127
1128 check_host_cflags(){
1129     log check_host_cflags "$@"
1130     set -- $($host_cflags_filter "$@")
1131     check_host_cc "$@" <<EOF && append host_cflags "$@"
1132 int x;
1133 EOF
1134 }
1135
1136 apply(){
1137     file=$1
1138     shift
1139     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1140 }
1141
1142 cp_if_changed(){
1143     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1144     mkdir -p "$(dirname $2)"
1145     $cp_f "$1" "$2"
1146 }
1147
1148 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1149 # system-dependent things.
1150
1151 COMPONENT_LIST="
1152     bsfs
1153     decoders
1154     demuxers
1155     encoders
1156     filters
1157     hwaccels
1158     indevs
1159     muxers
1160     outdevs
1161     parsers
1162     protocols
1163 "
1164
1165 EXTERNAL_LIBRARY_LIST="
1166     avisynth
1167     bzlib
1168     crystalhd
1169     fontconfig
1170     frei0r
1171     gnutls
1172     iconv
1173     ladspa
1174     libaacplus
1175     libass
1176     libbluray
1177     libcaca
1178     libcdio
1179     libcelt
1180     libdc1394
1181     libfaac
1182     libfdk_aac
1183     libflite
1184     libfreetype
1185     libgme
1186     libgsm
1187     libiec61883
1188     libilbc
1189     libmodplug
1190     libmp3lame
1191     libnut
1192     libopencore_amrnb
1193     libopencore_amrwb
1194     libopencv
1195     libopenjpeg
1196     libopus
1197     libpulse
1198     libquvi
1199     librtmp
1200     libschroedinger
1201     libshine
1202     libsoxr
1203     libspeex
1204     libssh
1205     libstagefright_h264
1206     libtheora
1207     libtwolame
1208     libutvideo
1209     libv4l2
1210     libvidstab
1211     libvo_aacenc
1212     libvo_amrwbenc
1213     libvorbis
1214     libvpx
1215     libwavpack
1216     libx264
1217     libxavs
1218     libxvid
1219     libzmq
1220     libzvbi
1221     openal
1222     opencl
1223     openssl
1224     x11grab
1225     zlib
1226 "
1227
1228 DOCUMENT_LIST="
1229     doc
1230     htmlpages
1231     manpages
1232     podpages
1233     txtpages
1234 "
1235
1236 HWACCEL_LIST="
1237     dxva2
1238     vaapi
1239     vda
1240     vdpau
1241 "
1242
1243 LIBRARY_LIST="
1244     avcodec
1245     avdevice
1246     avfilter
1247     avformat
1248     avresample
1249     avutil
1250     postproc
1251     swresample
1252     swscale
1253 "
1254
1255 PROGRAM_LIST="
1256     ffplay
1257     ffprobe
1258     ffserver
1259     ffmpeg
1260 "
1261
1262 CONFIG_LIST="
1263     $COMPONENT_LIST
1264     $DOCUMENT_LIST
1265     $EXTERNAL_LIBRARY_LIST
1266     $HWACCEL_LIST
1267     $LIBRARY_LIST
1268     $PROGRAM_LIST
1269     dct
1270     dwt
1271     error_resilience
1272     fast_unaligned
1273     fft
1274     ftrapv
1275     gpl
1276     gray
1277     hardcoded_tables
1278     incompatible_libav_abi
1279     incompatible_fork_abi
1280     lsp
1281     lzo
1282     mdct
1283     memalign_hack
1284     memory_poisoning
1285     network
1286     nonfree
1287     pic
1288     rdft
1289     runtime_cpudetect
1290     safe_bitstream_reader
1291     shared
1292     small
1293     sram
1294     static
1295     swscale_alpha
1296     thumb
1297     version3
1298     xmm_clobber_test
1299 "
1300
1301 THREADS_LIST='
1302     pthreads
1303     w32threads
1304     os2threads
1305 '
1306
1307 ATOMICS_LIST='
1308     atomics_gcc
1309     atomics_suncc
1310     atomics_win32
1311 '
1312
1313 ARCH_LIST='
1314     aarch64
1315     alpha
1316     arm
1317     avr32
1318     avr32_ap
1319     avr32_uc
1320     bfin
1321     ia64
1322     m68k
1323     mips
1324     mips64
1325     parisc
1326     ppc
1327     ppc64
1328     s390
1329     sh4
1330     sparc
1331     sparc64
1332     tilegx
1333     tilepro
1334     tomi
1335     x86
1336     x86_32
1337     x86_64
1338 '
1339
1340 ARCH_EXT_LIST_ARM='
1341     armv5te
1342     armv6
1343     armv6t2
1344     neon
1345     vfp
1346     vfpv3
1347 '
1348
1349 ARCH_EXT_LIST_X86='
1350     amd3dnow
1351     amd3dnowext
1352     avx
1353     avx2
1354     fma4
1355     i686
1356     mmx
1357     mmxext
1358     sse
1359     sse2
1360     sse3
1361     sse4
1362     sse42
1363     ssse3
1364 '
1365
1366 ARCH_EXT_LIST="
1367     $ARCH_EXT_LIST_ARM
1368     $ARCH_EXT_LIST_X86
1369     altivec
1370     ppc4xx
1371     vis
1372     mipsfpu
1373     mips32r2
1374     mipsdspr1
1375     mipsdspr2
1376 "
1377
1378 HAVE_LIST_CMDLINE='
1379     inline_asm
1380     symver
1381     yasm
1382 '
1383
1384 HAVE_LIST_PUB='
1385     bigendian
1386     fast_unaligned
1387     incompatible_libav_abi
1388     incompatible_fork_abi
1389 '
1390
1391 MATH_FUNCS="
1392     atanf
1393     atan2f
1394     cbrt
1395     cbrtf
1396     cosf
1397     exp2
1398     exp2f
1399     expf
1400     isinf
1401     isnan
1402     ldexpf
1403     llrint
1404     llrintf
1405     log2
1406     log2f
1407     log10f
1408     lrint
1409     lrintf
1410     powf
1411     rint
1412     round
1413     roundf
1414     sinf
1415     trunc
1416     truncf
1417 "
1418
1419 HAVE_LIST="
1420     $ARCH_EXT_LIST
1421     $(add_suffix _external $ARCH_EXT_LIST)
1422     $(add_suffix _inline   $ARCH_EXT_LIST)
1423     $HAVE_LIST_CMDLINE
1424     $HAVE_LIST_PUB
1425     $THREADS_LIST
1426     $ATOMICS_LIST
1427     $MATH_FUNCS
1428     access
1429     aligned_malloc
1430     aligned_stack
1431     alsa_asoundlib_h
1432     altivec_h
1433     arpa_inet_h
1434     asm_mod_q
1435     asm_mod_y
1436     asm_types_h
1437     atomic_cas_ptr
1438     atomics_native
1439     attribute_may_alias
1440     attribute_packed
1441     cdio_paranoia_h
1442     cdio_paranoia_paranoia_h
1443     CL_cl_h
1444     clock_gettime
1445     closesocket
1446     CommandLineToArgvW
1447     cpunop
1448     CryptGenRandom
1449     dcbzl
1450     dev_bktr_ioctl_bt848_h
1451     dev_bktr_ioctl_meteor_h
1452     dev_ic_bt8xx_h
1453     dev_video_bktr_ioctl_bt848_h
1454     dev_video_meteor_ioctl_meteor_h
1455     direct_h
1456     dlfcn_h
1457     dlopen
1458     dos_paths
1459     dxva_h
1460     ebp_available
1461     ebx_available
1462     fast_64bit
1463     fast_clz
1464     fast_cmov
1465     fcntl
1466     fork
1467     getaddrinfo
1468     gethrtime
1469     getopt
1470     GetProcessAffinityMask
1471     GetProcessMemoryInfo
1472     GetProcessTimes
1473     GetSystemTimeAsFileTime
1474     getrusage
1475     getservbyport
1476     gettimeofday
1477     glob
1478     gnu_as
1479     gsm_h
1480     ibm_asm
1481     inet_aton
1482     io_h
1483     inline_asm_labels
1484     isatty
1485     jack_port_get_latency_range
1486     kbhit
1487     ldbrx
1488     libdc1394_1
1489     libdc1394_2
1490     local_aligned_16
1491     local_aligned_8
1492     localtime_r
1493     loongson
1494     lzo1x_999_compress
1495     machine_ioctl_bt848_h
1496     machine_ioctl_meteor_h
1497     machine_rw_barrier
1498     makeinfo
1499     malloc_h
1500     MapViewOfFile
1501     memalign
1502     MemoryBarrier
1503     mkstemp
1504     mm_empty
1505     mmap
1506     mprotect
1507     msvcrt
1508     nanosleep
1509     openjpeg_1_5_openjpeg_h
1510     PeekNamedPipe
1511     perl
1512     pod2man
1513     poll_h
1514     posix_memalign
1515     pragma_deprecated
1516     pthread_cancel
1517     rdtsc
1518     rsync_contimeout
1519     sarestart
1520     sched_getaffinity
1521     sdl
1522     SetConsoleTextAttribute
1523     setmode
1524     setrlimit
1525     Sleep
1526     sndio_h
1527     socklen_t
1528     soundcard_h
1529     strerror_r
1530     struct_addrinfo
1531     struct_group_source_req
1532     struct_ip_mreq_source
1533     struct_ipv6_mreq
1534     struct_pollfd
1535     struct_rusage_ru_maxrss
1536     struct_sctp_event_subscribe
1537     struct_sockaddr_in6
1538     struct_sockaddr_sa_len
1539     struct_sockaddr_storage
1540     struct_stat_st_mtim_tv_nsec
1541     struct_v4l2_frmivalenum_discrete
1542     symver_asm_label
1543     symver_gnu_asm
1544     sync_val_compare_and_swap
1545     sysconf
1546     sysctl
1547     sys_mman_h
1548     sys_param_h
1549     sys_resource_h
1550     sys_select_h
1551     sys_soundcard_h
1552     sys_time_h
1553     sys_un_h
1554     sys_videoio_h
1555     termios_h
1556     texi2html
1557     threads
1558     unistd_h
1559     usleep
1560     vfp_args
1561     VirtualAlloc
1562     windows_h
1563     winsock2_h
1564     xform_asm
1565     xmm_clobbers
1566 "
1567
1568 # options emitted with CONFIG_ prefix but not available on the command line
1569 CONFIG_EXTRA="
1570     aandcttables
1571     ac3dsp
1572     audio_frame_queue
1573     dsputil
1574     exif
1575     frame_thread_encoder
1576     gcrypt
1577     golomb
1578     gplv3
1579     h263dsp
1580     h264chroma
1581     h264dsp
1582     h264pred
1583     h264qpel
1584     hpeldsp
1585     huffman
1586     lgplv3
1587     lpc
1588     mpegaudio
1589     mpegaudiodsp
1590     mpegvideo
1591     mpegvideoenc
1592     nettle
1593     rangecoder
1594     riffdec
1595     riffenc
1596     rtpdec
1597     rtpenc_chain
1598     sinewin
1599     videodsp
1600     vp3dsp
1601 "
1602
1603 CMDLINE_SELECT="
1604     $ARCH_EXT_LIST
1605     $CONFIG_LIST
1606     $HAVE_LIST_CMDLINE
1607     $THREADS_LIST
1608     asm
1609     cross_compile
1610     debug
1611     extra_warnings
1612     logging
1613     lto
1614     optimizations
1615     stripping
1616 "
1617
1618 PATHS_LIST='
1619     bindir
1620     datadir
1621     docdir
1622     incdir
1623     libdir
1624     mandir
1625     prefix
1626     shlibdir
1627 '
1628
1629 CMDLINE_SET="
1630     $PATHS_LIST
1631     ar
1632     arch
1633     as
1634     assert_level
1635     build_suffix
1636     cc
1637     cpu
1638     cross_prefix
1639     cxx
1640     dep_cc
1641     extra_version
1642     host_cc
1643     host_cflags
1644     host_ld
1645     host_ldflags
1646     host_libs
1647     host_os
1648     install
1649     ld
1650     logfile
1651     malloc_prefix
1652     nm
1653     optflags
1654     pkg_config
1655     progs_suffix
1656     random_seed
1657     samples
1658     strip
1659     sysinclude
1660     sysroot
1661     target_exec
1662     target_os
1663     target_path
1664     target_samples
1665     tempprefix
1666     toolchain
1667     valgrind
1668     yasmexe
1669 "
1670
1671 CMDLINE_APPEND="
1672     extra_cflags
1673     extra_cxxflags
1674     host_cppflags
1675 "
1676
1677 # code dependency declarations
1678
1679 # architecture extensions
1680
1681 armv5te_deps="arm"
1682 armv6_deps="arm"
1683 armv6t2_deps="arm"
1684 neon_deps="arm"
1685 vfp_deps="arm"
1686 vfpv3_deps="vfp"
1687
1688 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1689
1690 mipsfpu_deps="mips"
1691 mips32r2_deps="mips"
1692 mipsdspr1_deps="mips"
1693 mipsdspr2_deps="mips"
1694
1695 altivec_deps="ppc"
1696 ppc4xx_deps="ppc"
1697
1698 vis_deps="sparc"
1699
1700 cpunop_deps="i686"
1701 x86_64_select="i686"
1702 x86_64_suggest="fast_cmov"
1703
1704 amd3dnow_deps="mmx"
1705 amd3dnowext_deps="amd3dnow"
1706 mmx_deps="x86"
1707 mmxext_deps="mmx"
1708 sse_deps="mmxext"
1709 sse2_deps="sse"
1710 sse3_deps="sse2"
1711 ssse3_deps="sse3"
1712 sse4_deps="ssse3"
1713 sse42_deps="sse4"
1714 avx_deps="sse42"
1715 fma4_deps="avx"
1716 avx2_deps="avx"
1717
1718 mmx_external_deps="yasm"
1719 mmx_inline_deps="inline_asm"
1720 mmx_suggest="mmx_external mmx_inline"
1721
1722 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86); do
1723     eval dep=\$${ext}_deps
1724     eval ${ext}_external_deps='"${dep}_external"'
1725     eval ${ext}_inline_deps='"${dep}_inline"'
1726     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1727 done
1728
1729 aligned_stack_if_any="ppc x86"
1730 fast_64bit_if_any="alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1731 fast_clz_if_any="alpha avr32 mips ppc x86"
1732 fast_unaligned_if_any="ppc x86"
1733
1734 inline_asm_deps="!tms470"
1735 need_memalign="altivec neon sse"
1736
1737 symver_if_any="symver_asm_label symver_gnu_asm"
1738
1739 log2_deps="!msvcrt"
1740
1741 # subsystems
1742 dct_select="rdft"
1743 error_resilience_select="dsputil"
1744 frame_thread_encoder_deps="encoders threads"
1745 lpc_select="dsputil"
1746 mdct_select="fft"
1747 rdft_select="fft"
1748 mpegaudio_select="mpegaudiodsp"
1749 mpegaudiodsp_select="dct"
1750 mpegvideo_select="dsputil h264chroma hpeldsp videodsp"
1751 mpegvideoenc_select="mpegvideo"
1752
1753 # decoders / encoders
1754 aac_decoder_select="mdct sinewin"
1755 aac_encoder_select="audio_frame_queue mdct sinewin"
1756 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1757 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1758 ac3_encoder_select="mdct ac3dsp dsputil"
1759 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1760 aic_decoder_select="dsputil golomb"
1761 alac_encoder_select="lpc"
1762 als_decoder_select="dsputil"
1763 amrnb_decoder_select="lsp"
1764 amrwb_decoder_select="lsp"
1765 amv_decoder_select="dsputil hpeldsp exif"
1766 amv_encoder_select="aandcttables"
1767 ape_decoder_select="dsputil"
1768 asv1_decoder_select="dsputil"
1769 asv1_encoder_select="dsputil"
1770 asv2_decoder_select="dsputil"
1771 asv2_encoder_select="dsputil"
1772 atrac1_decoder_select="mdct sinewin"
1773 atrac3_decoder_select="mdct"
1774 avrn_decoder_select="exif"
1775 bink_decoder_select="dsputil hpeldsp"
1776 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
1777 binkaudio_rdft_decoder_select="mdct rdft sinewin"
1778 cavs_decoder_select="dsputil golomb h264chroma videodsp"
1779 cllc_decoder_select="dsputil"
1780 comfortnoise_encoder_select="lpc"
1781 cook_decoder_select="dsputil mdct sinewin"
1782 cscd_decoder_select="lzo"
1783 cscd_decoder_suggest="zlib"
1784 dca_decoder_select="mdct"
1785 dirac_decoder_select="dsputil dwt golomb videodsp"
1786 dnxhd_decoder_select="dsputil"
1787 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
1788 dvvideo_decoder_select="dsputil"
1789 dvvideo_encoder_select="dsputil"
1790 dxa_decoder_select="zlib"
1791 eac3_decoder_select="ac3_decoder"
1792 eac3_encoder_select="ac3_encoder"
1793 eamad_decoder_select="aandcttables dsputil mpegvideo"
1794 eatgq_decoder_select="aandcttables"
1795 eatqi_decoder_select="aandcttables error_resilience mpegvideo"
1796 exr_decoder_select="zlib"
1797 ffv1_decoder_select="dsputil golomb rangecoder"
1798 ffv1_encoder_select="dsputil rangecoder"
1799 ffvhuff_decoder_select="dsputil"
1800 ffvhuff_encoder_select="dsputil huffman"
1801 flac_decoder_select="golomb"
1802 flac_encoder_select="dsputil golomb lpc"
1803 flashsv_decoder_select="zlib"
1804 flashsv_encoder_select="zlib"
1805 flashsv2_encoder_select="zlib"
1806 flashsv2_decoder_select="zlib"
1807 flv_decoder_select="h263_decoder"
1808 flv_encoder_select="h263_encoder"
1809 fourxm_decoder_select="dsputil"
1810 fraps_decoder_select="dsputil huffman"
1811 g2m_decoder_select="dsputil zlib"
1812 g729_decoder_select="dsputil"
1813 h261_decoder_select="error_resilience mpegvideo"
1814 h261_encoder_select="aandcttables mpegvideoenc"
1815 h263_decoder_select="error_resilience h263_parser h263dsp mpegvideo"
1816 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1817 h263i_decoder_select="h263_decoder"
1818 h263p_encoder_select="h263_encoder"
1819 h264_decoder_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1820 h264_decoder_suggest="error_resilience"
1821 hevc_decoder_select="dsputil golomb videodsp"
1822 huffyuv_decoder_select="dsputil"
1823 huffyuv_encoder_select="dsputil huffman"
1824 iac_decoder_select="dsputil fft mdct sinewin"
1825 imc_decoder_select="dsputil fft mdct sinewin"
1826 indeo3_decoder_select="hpeldsp"
1827 interplay_video_decoder_select="hpeldsp"
1828 jpegls_decoder_select="dsputil golomb hpeldsp exif"
1829 jpegls_encoder_select="golomb"
1830 jv_decoder_select="dsputil"
1831 lagarith_decoder_select="dsputil"
1832 ljpeg_encoder_select="aandcttables mpegvideoenc"
1833 loco_decoder_select="golomb"
1834 mdec_decoder_select="dsputil error_resilience mpegvideo"
1835 metasound_decoder_select="lsp mdct sinewin"
1836 mimic_decoder_select="dsputil hpeldsp"
1837 mjpeg_decoder_select="dsputil hpeldsp exif"
1838 mjpegb_decoder_select="dsputil hpeldsp exif"
1839 mjpeg_encoder_select="aandcttables dsputil mpegvideoenc"
1840 mlp_decoder_select="dsputil mlp_parser"
1841 motionpixels_decoder_select="dsputil"
1842 mp1_decoder_select="mpegaudio"
1843 mp1float_decoder_select="mpegaudio"
1844 mp2_decoder_select="mpegaudio"
1845 mp2float_decoder_select="mpegaudio"
1846 mp3_decoder_select="mpegaudio"
1847 mp3adu_decoder_select="mpegaudio"
1848 mp3adufloat_decoder_select="mpegaudio"
1849 mp3float_decoder_select="mpegaudio"
1850 mp3on4_decoder_select="mpegaudio"
1851 mp3on4float_decoder_select="mpegaudio"
1852 mpc7_decoder_select="dsputil mpegaudiodsp"
1853 mpc8_decoder_select="dsputil mpegaudiodsp"
1854 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1855 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1856 mpeg1video_decoder_select="error_resilience mpegvideo"
1857 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1858 mpeg2video_decoder_select="error_resilience mpegvideo"
1859 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1860 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1861 mpeg4_encoder_select="h263_encoder"
1862 msmpeg4v1_decoder_select="h263_decoder"
1863 msmpeg4v2_decoder_select="h263_decoder"
1864 msmpeg4v2_encoder_select="h263_encoder"
1865 msmpeg4v3_decoder_select="h263_decoder"
1866 msmpeg4v3_encoder_select="h263_encoder"
1867 mss2_decoder_select="error_resilience vc1_decoder"
1868 mxpeg_decoder_select="dsputil hpeldsp exif"
1869 nellymoser_decoder_select="mdct sinewin"
1870 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1871 nuv_decoder_select="dsputil lzo"
1872 png_decoder_select="zlib"
1873 png_encoder_select="dsputil zlib"
1874 prores_decoder_select="dsputil"
1875 prores_encoder_select="dsputil"
1876 qcelp_decoder_select="lsp"
1877 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1878 ra_144_encoder_select="audio_frame_queue lpc"
1879 ralf_decoder_select="golomb"
1880 rtjpeg_decoder_select="dsputil"
1881 rv10_decoder_select="error_resilience h263_decoder h263dsp"
1882 rv10_encoder_select="h263_encoder"
1883 rv20_decoder_select="error_resilience h263_decoder h263dsp"
1884 rv20_encoder_select="h263_encoder"
1885 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1886 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1887 shorten_decoder_select="golomb"
1888 sipr_decoder_select="lsp"
1889 snow_decoder_select="dsputil dwt h264qpel hpeldsp rangecoder"
1890 snow_encoder_select="aandcttables dsputil dwt h264qpel hpeldsp mpegvideoenc rangecoder"
1891 sonic_decoder_select="golomb"
1892 sonic_encoder_select="golomb"
1893 sonic_ls_encoder_select="golomb"
1894 sp5x_decoder_select="dsputil hpeldsp exif"
1895 svq1_decoder_select="hpeldsp"
1896 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
1897 svq3_decoder_select="golomb h264chroma h264dsp h264pred h264qpel hpeldsp mpegvideo videodsp"
1898 svq3_decoder_suggest="error_resilience zlib"
1899 tak_decoder_select="dsputil"
1900 theora_decoder_select="vp3_decoder"
1901 tiff_decoder_suggest="zlib"
1902 tiff_encoder_suggest="zlib"
1903 thp_decoder_select="dsputil hpeldsp exif"
1904 truehd_decoder_select="mlp_parser"
1905 truemotion2_decoder_select="dsputil"
1906 truespeech_decoder_select="dsputil"
1907 tscc_decoder_select="zlib"
1908 twinvq_decoder_select="mdct lsp sinewin"
1909 utvideo_decoder_select="dsputil"
1910 utvideo_encoder_select="dsputil huffman"
1911 vble_decoder_select="dsputil"
1912 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel"
1913 vc1image_decoder_select="vc1_decoder"
1914 vorbis_decoder_select="mdct"
1915 vorbis_encoder_select="mdct"
1916 vp3_decoder_select="hpeldsp vp3dsp videodsp"
1917 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
1918 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
1919 vp6a_decoder_select="vp6_decoder"
1920 vp6f_decoder_select="vp6_decoder"
1921 vp8_decoder_select="h264pred videodsp"
1922 vp9_decoder_select="videodsp"
1923 webp_decoder_select="vp8_decoder"
1924 wmapro_decoder_select="mdct sinewin"
1925 wmav1_decoder_select="mdct sinewin"
1926 wmav1_encoder_select="mdct sinewin"
1927 wmav2_decoder_select="mdct sinewin"
1928 wmav2_encoder_select="mdct sinewin"
1929 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
1930 wmv1_decoder_select="h263_decoder"
1931 wmv1_encoder_select="h263_encoder"
1932 wmv2_decoder_select="h263_decoder videodsp"
1933 wmv2_encoder_select="h263_encoder"
1934 wmv3_decoder_select="vc1_decoder"
1935 wmv3image_decoder_select="wmv3_decoder"
1936 zerocodec_decoder_select="zlib"
1937 zlib_decoder_select="zlib"
1938 zlib_encoder_select="zlib"
1939 zmbv_decoder_select="zlib"
1940 zmbv_encoder_select="zlib"
1941
1942 # hardware accelerators
1943 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
1944 dxva2_deps="dxva2api_h"
1945 vaapi_deps="va_va_h"
1946 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
1947 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
1948 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
1949
1950 h263_vaapi_hwaccel_deps="vaapi"
1951 h263_vaapi_hwaccel_select="h263_decoder"
1952 h263_vdpau_hwaccel_deps="vdpau"
1953 h263_vdpau_hwaccel_select="h263_decoder"
1954 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
1955 h264_dxva2_hwaccel_deps="dxva2"
1956 h264_dxva2_hwaccel_select="h264_decoder"
1957 h264_vaapi_hwaccel_deps="vaapi"
1958 h264_vaapi_hwaccel_select="h264_decoder"
1959 h264_vda_decoder_deps="vda"
1960 h264_vda_decoder_select="h264_decoder"
1961 h264_vda_hwaccel_deps="vda"
1962 h264_vda_hwaccel_select="h264_decoder"
1963 h264_vdpau_decoder_deps="vdpau"
1964 h264_vdpau_decoder_select="h264_decoder"
1965 h264_vdpau_hwaccel_deps="vdpau"
1966 h264_vdpau_hwaccel_select="h264_decoder"
1967 mpeg_vdpau_decoder_deps="vdpau"
1968 mpeg_vdpau_decoder_select="mpeg2video_decoder"
1969 mpeg1_vdpau_decoder_deps="vdpau"
1970 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
1971 mpeg1_vdpau_hwaccel_deps="vdpau"
1972 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
1973 mpeg2_crystalhd_decoder_select="crystalhd"
1974 mpeg2_dxva2_hwaccel_deps="dxva2"
1975 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
1976 mpeg2_vaapi_hwaccel_deps="vaapi"
1977 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
1978 mpeg2_vdpau_hwaccel_deps="vdpau"
1979 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
1980 mpeg4_crystalhd_decoder_select="crystalhd"
1981 mpeg4_vaapi_hwaccel_deps="vaapi"
1982 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
1983 mpeg4_vdpau_decoder_deps="vdpau"
1984 mpeg4_vdpau_decoder_select="mpeg4_decoder"
1985 mpeg4_vdpau_hwaccel_deps="vdpau"
1986 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
1987 msmpeg4_crystalhd_decoder_select="crystalhd"
1988 vc1_crystalhd_decoder_select="crystalhd"
1989 vc1_dxva2_hwaccel_deps="dxva2"
1990 vc1_dxva2_hwaccel_select="vc1_decoder"
1991 vc1_vaapi_hwaccel_deps="vaapi"
1992 vc1_vaapi_hwaccel_select="vc1_decoder"
1993 vc1_vdpau_decoder_deps="vdpau"
1994 vc1_vdpau_decoder_select="vc1_decoder"
1995 vc1_vdpau_hwaccel_deps="vdpau"
1996 vc1_vdpau_hwaccel_select="vc1_decoder"
1997 wmv3_crystalhd_decoder_select="crystalhd"
1998 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
1999 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2000 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2001 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2002
2003 # parsers
2004 h264_parser_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
2005 mpeg4video_parser_select="error_resilience mpegvideo"
2006 mpegvideo_parser_select="error_resilience mpegvideo"
2007 vc1_parser_select="mpegvideo"
2008
2009 # external libraries
2010 libaacplus_encoder_deps="libaacplus"
2011 libcelt_decoder_deps="libcelt"
2012 libfaac_encoder_deps="libfaac"
2013 libfaac_encoder_select="audio_frame_queue"
2014 libfdk_aac_decoder_deps="libfdk_aac"
2015 libfdk_aac_encoder_deps="libfdk_aac"
2016 libfdk_aac_encoder_select="audio_frame_queue"
2017 libgme_demuxer_deps="libgme"
2018 libgsm_decoder_deps="libgsm"
2019 libgsm_encoder_deps="libgsm"
2020 libgsm_ms_decoder_deps="libgsm"
2021 libgsm_ms_encoder_deps="libgsm"
2022 libilbc_decoder_deps="libilbc"
2023 libilbc_encoder_deps="libilbc"
2024 libmodplug_demuxer_deps="libmodplug"
2025 libmp3lame_encoder_deps="libmp3lame"
2026 libmp3lame_encoder_select="audio_frame_queue"
2027 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2028 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2029 libopencore_amrnb_encoder_select="audio_frame_queue"
2030 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2031 libopenjpeg_decoder_deps="libopenjpeg"
2032 libopenjpeg_encoder_deps="libopenjpeg"
2033 libopus_decoder_deps="libopus"
2034 libopus_encoder_deps="libopus"
2035 libopus_encoder_select="audio_frame_queue"
2036 libquvi_demuxer_deps="libquvi"
2037 libschroedinger_decoder_deps="libschroedinger"
2038 libschroedinger_encoder_deps="libschroedinger"
2039 libshine_encoder_deps="libshine"
2040 libshine_encoder_select="audio_frame_queue"
2041 libspeex_decoder_deps="libspeex"
2042 libspeex_encoder_deps="libspeex"
2043 libspeex_encoder_select="audio_frame_queue"
2044 libstagefright_h264_decoder_deps="libstagefright_h264"
2045 libtheora_encoder_deps="libtheora"
2046 libtwolame_encoder_deps="libtwolame"
2047 libvo_aacenc_encoder_deps="libvo_aacenc"
2048 libvo_aacenc_encoder_select="audio_frame_queue"
2049 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2050 libvorbis_decoder_deps="libvorbis"
2051 libvorbis_encoder_deps="libvorbis"
2052 libvorbis_encoder_select="audio_frame_queue"
2053 libvpx_vp8_decoder_deps="libvpx"
2054 libvpx_vp8_encoder_deps="libvpx"
2055 libvpx_vp9_decoder_deps="libvpx"
2056 libvpx_vp9_encoder_deps="libvpx"
2057 libwavpack_encoder_deps="libwavpack"
2058 libx264_encoder_deps="libx264"
2059 libx264rgb_encoder_deps="libx264"
2060 libxavs_encoder_deps="libxavs"
2061 libxvid_encoder_deps="libxvid"
2062 libutvideo_decoder_deps="libutvideo"
2063 libutvideo_encoder_deps="libutvideo"
2064 libzvbi_teletext_decoder_deps="libzvbi"
2065
2066 # demuxers / muxers
2067 ac3_demuxer_select="ac3_parser"
2068 asf_demuxer_select="riffdec"
2069 asf_muxer_select="riffenc"
2070 asf_stream_muxer_select="asf_muxer"
2071 avi_demuxer_select="riffdec"
2072 avi_muxer_select="riffenc"
2073 avisynth_demuxer_deps="avisynth"
2074 avisynth_demuxer_select="riffdec"
2075 caf_demuxer_select="riffdec"
2076 dirac_demuxer_select="dirac_parser"
2077 dts_demuxer_select="dca_parser"
2078 dtshd_demuxer_select="dca_parser"
2079 dxa_demuxer_select="riffdec"
2080 eac3_demuxer_select="ac3_parser"
2081 f4v_muxer_select="mov_muxer"
2082 flac_demuxer_select="flac_parser"
2083 hds_muxer_select="flv_muxer"
2084 hls_muxer_select="mpegts_muxer"
2085 ipod_muxer_select="mov_muxer"
2086 ismv_muxer_select="mov_muxer"
2087 libnut_demuxer_deps="libnut"
2088 libnut_muxer_deps="libnut"
2089 matroska_audio_muxer_select="matroska_muxer"
2090 matroska_demuxer_select="riffdec"
2091 matroska_demuxer_suggest="bzlib lzo zlib"
2092 matroska_muxer_select="riffenc"
2093 mmf_muxer_select="riffenc"
2094 mov_demuxer_select="riffdec"
2095 mov_demuxer_suggest="zlib"
2096 mov_muxer_select="riffenc rtpenc_chain"
2097 mp3_demuxer_select="mpegaudio_parser"
2098 mp4_muxer_select="mov_muxer"
2099 mpegts_muxer_select="adts_muxer latm_muxer"
2100 mpegtsraw_demuxer_select="mpegts_demuxer"
2101 mxf_d10_muxer_select="mxf_muxer"
2102 nut_muxer_select="riffenc"
2103 nuv_demuxer_select="riffdec"
2104 ogg_demuxer_select="golomb"
2105 psp_muxer_select="mov_muxer"
2106 rtp_demuxer_select="sdp_demuxer"
2107 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2108 rtsp_demuxer_select="http_protocol rtpdec"
2109 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2110 sap_demuxer_select="sdp_demuxer"
2111 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2112 sdp_demuxer_select="rtpdec"
2113 smoothstreaming_muxer_select="ismv_muxer"
2114 spdif_muxer_select="aac_parser"
2115 tak_demuxer_select="tak_parser"
2116 tg2_muxer_select="mov_muxer"
2117 tgp_muxer_select="mov_muxer"
2118 vobsub_demuxer_select="mpegps_demuxer"
2119 w64_demuxer_select="wav_demuxer"
2120 w64_muxer_select="wav_muxer"
2121 wav_demuxer_select="riffdec"
2122 wav_muxer_select="riffenc"
2123 webm_muxer_select="riffenc"
2124 wtv_demuxer_select="riffdec"
2125 xmv_demuxer_select="riffdec"
2126 xwma_demuxer_select="riffdec"
2127
2128 # indevs / outdevs
2129 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2130 alsa_outdev_deps="alsa_asoundlib_h"
2131 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2132 caca_outdev_deps="libcaca"
2133 dshow_indev_deps="IBaseFilter"
2134 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
2135 dv1394_indev_deps="dv1394"
2136 dv1394_indev_select="dv_demuxer"
2137 fbdev_indev_deps="linux_fb_h"
2138 fbdev_outdev_deps="linux_fb_h"
2139 iec61883_indev_deps="libiec61883"
2140 jack_indev_deps="jack_jack_h sem_timedwait"
2141 lavfi_indev_deps="avfilter"
2142 libcdio_indev_deps="libcdio"
2143 libdc1394_indev_deps="libdc1394"
2144 libv4l2_indev_deps="libv4l2"
2145 openal_indev_deps="openal"
2146 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2147 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2148 pulse_indev_deps="libpulse"
2149 pulse_outdev_deps="libpulse"
2150 sdl_outdev_deps="sdl"
2151 sndio_indev_deps="sndio_h"
2152 sndio_outdev_deps="sndio_h"
2153 v4l_indev_deps="linux_videodev_h"
2154 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2155 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2156 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2157 vfwcap_indev_extralibs="-lavicap32"
2158 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2159 xv_outdev_extralibs="-lXv -lX11 -lXext"
2160 x11grab_indev_deps="x11grab"
2161
2162 # protocols
2163 bluray_protocol_deps="libbluray"
2164 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2165 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2166 ffrtmpcrypt_protocol_select="tcp_protocol"
2167 ffrtmphttp_protocol_deps="!librtmp_protocol"
2168 ffrtmphttp_protocol_select="http_protocol"
2169 ftp_protocol_select="tcp_protocol"
2170 gopher_protocol_select="network"
2171 httpproxy_protocol_select="tcp_protocol"
2172 http_protocol_select="tcp_protocol"
2173 https_protocol_select="tls_protocol"
2174 librtmp_protocol_deps="librtmp"
2175 librtmpe_protocol_deps="librtmp"
2176 librtmps_protocol_deps="librtmp"
2177 librtmpt_protocol_deps="librtmp"
2178 librtmpte_protocol_deps="librtmp"
2179 libssh_protocol_deps="libssh"
2180 mmsh_protocol_select="http_protocol"
2181 mmst_protocol_select="network"
2182 rtmp_protocol_deps="!librtmp_protocol"
2183 rtmp_protocol_select="tcp_protocol"
2184 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2185 rtmps_protocol_deps="!librtmp_protocol"
2186 rtmps_protocol_select="tls_protocol"
2187 rtmpt_protocol_select="ffrtmphttp_protocol"
2188 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2189 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2190 rtp_protocol_select="udp_protocol"
2191 sctp_protocol_deps="struct_sctp_event_subscribe"
2192 sctp_protocol_select="network"
2193 srtp_protocol_select="rtp_protocol"
2194 tcp_protocol_select="network"
2195 tls_protocol_deps_any="openssl gnutls"
2196 tls_protocol_select="tcp_protocol"
2197 udp_protocol_select="network"
2198 unix_protocol_deps="sys_un_h"
2199 unix_protocol_select="network"
2200
2201 # filters
2202 aconvert_filter_deps="swresample"
2203 amovie_filter_deps="avcodec avformat"
2204 aresample_filter_deps="swresample"
2205 ass_filter_deps="libass"
2206 asyncts_filter_deps="avresample"
2207 atempo_filter_deps="avcodec"
2208 atempo_filter_select="rdft"
2209 azmq_filter_deps="libzmq"
2210 blackframe_filter_deps="gpl"
2211 boxblur_filter_deps="gpl"
2212 colormatrix_filter_deps="gpl"
2213 cropdetect_filter_deps="gpl"
2214 dctdnoiz_filter_deps="avcodec"
2215 dctdnoiz_filter_select="fft"
2216 delogo_filter_deps="gpl"
2217 deshake_filter_deps="avcodec"
2218 deshake_filter_select="dsputil"
2219 drawtext_filter_deps="libfreetype"
2220 ebur128_filter_deps="gpl"
2221 flite_filter_deps="libflite"
2222 frei0r_filter_deps="frei0r dlopen"
2223 frei0r_filter_extralibs='$ldl'
2224 frei0r_src_filter_deps="frei0r dlopen"
2225 frei0r_src_filter_extralibs='$ldl'
2226 geq_filter_deps="gpl"
2227 histeq_filter_deps="gpl"
2228 hqdn3d_filter_deps="gpl"
2229 interlace_filter_deps="gpl"
2230 kerndeint_filter_deps="gpl"
2231 ladspa_filter_deps="ladspa dlopen"
2232 mcdeint_filter_deps="avcodec gpl"
2233 movie_filter_deps="avcodec avformat"
2234 mp_filter_deps="gpl avcodec swscale inline_asm"
2235 mpdecimate_filter_deps="gpl avcodec"
2236 mptestsrc_filter_deps="gpl"
2237 negate_filter_deps="lut_filter"
2238 perspective_filter_deps="gpl"
2239 resample_filter_deps="avresample"
2240 ocv_filter_deps="libopencv"
2241 owdenoise_filter_deps="gpl"
2242 pan_filter_deps="swresample"
2243 phase_filter_deps="gpl"
2244 pp_filter_deps="gpl postproc"
2245 pullup_filter_deps="gpl"
2246 removelogo_filter_deps="avcodec avformat swscale"
2247 sab_filter_deps="gpl swscale"
2248 scale_filter_deps="swscale"
2249 smartblur_filter_deps="gpl swscale"
2250 showspectrum_filter_deps="avcodec"
2251 showspectrum_filter_select="rdft"
2252 spp_filter_deps="gpl avcodec"
2253 spp_filter_select="fft"
2254 stereo3d_filter_deps="gpl"
2255 subtitles_filter_deps="avformat avcodec libass"
2256 super2xsai_filter_deps="gpl"
2257 tinterlace_filter_deps="gpl"
2258 vidstabdetect_filter_deps="libvidstab"
2259 vidstabtransform_filter_deps="libvidstab"
2260 yadif_filter_deps="gpl"
2261 pixfmts_super2xsai_test_deps="super2xsai_filter"
2262 tinterlace_merge_test_deps="tinterlace_filter"
2263 tinterlace_pad_test_deps="tinterlace_filter"
2264 zmq_filter_deps="libzmq"
2265
2266 # libraries
2267 avcodec_deps="avutil"
2268 avdevice_deps="avutil avcodec avformat"
2269 avfilter_deps="avutil"
2270 avformat_deps="avutil avcodec"
2271 avresample_deps="avutil"
2272 postproc_deps="avutil gpl"
2273 swscale_deps="avutil"
2274
2275 # programs
2276 ffmpeg_deps="avcodec avfilter avformat swresample"
2277 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2278                null_filter
2279                setpts_filter trim_filter"
2280 ffplay_deps="avcodec avformat swscale swresample sdl"
2281 ffplay_select="rdft crop_filter"
2282 ffprobe_deps="avcodec avformat"
2283 ffserver_deps="avformat fork sarestart"
2284 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2285 ffserver_extralibs='$ldl'
2286
2287 # documentation
2288 podpages_deps="perl"
2289 manpages_deps="perl pod2man"
2290 htmlpages_deps="texi2html"
2291 txtpages_deps="makeinfo"
2292 doc_deps_any="manpages htmlpages podpages txtpages"
2293
2294 # default parameters
2295
2296 logfile="config.log"
2297
2298 # installation paths
2299 prefix_default="/usr/local"
2300 bindir_default='${prefix}/bin'
2301 datadir_default='${prefix}/share/ffmpeg'
2302 docdir_default='${prefix}/share/doc/ffmpeg'
2303 incdir_default='${prefix}/include'
2304 libdir_default='${prefix}/lib'
2305 mandir_default='${prefix}/share/man'
2306 shlibdir_default="$libdir_default"
2307
2308 # toolchain
2309 ar_default="ar"
2310 cc_default="gcc"
2311 cxx_default="g++"
2312 host_cc_default="gcc"
2313 cp_f="cp -f"
2314 install="install"
2315 ln_s="ln -s -f"
2316 nm_default="nm -g"
2317 objformat="elf"
2318 pkg_config_default=pkg-config
2319 ranlib="ranlib"
2320 strip_default="strip"
2321 yasmexe_default="yasm"
2322
2323 nogas=":"
2324
2325 # machine
2326 arch_default=$(uname -m)
2327 cpu="generic"
2328
2329 # OS
2330 target_os_default=$(tolower $(uname -s))
2331 host_os=$target_os_default
2332
2333 # configurable options
2334 enable $PROGRAM_LIST
2335 enable $DOCUMENT_LIST
2336 enable $(filter_out avresample $LIBRARY_LIST)
2337 enable stripping
2338
2339 enable asm
2340 enable debug
2341 enable doc
2342 enable optimizations
2343 enable runtime_cpudetect
2344 enable safe_bitstream_reader
2345 enable static
2346 enable swscale_alpha
2347
2348 # Enable hwaccels by default.
2349 enable dxva2 vaapi vdpau
2350
2351 # build settings
2352 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2353 LIBPREF="lib"
2354 LIBSUF=".a"
2355 FULLNAME='$(NAME)$(BUILDSUF)'
2356 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2357 SLIBPREF="lib"
2358 SLIBSUF=".so"
2359 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2360 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2361 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2362 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2363 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2364 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2365
2366 asflags_filter=echo
2367 cflags_filter=echo
2368 ldflags_filter=echo
2369
2370 AS_C='-c'
2371 AS_O='-o $@'
2372 CC_C='-c'
2373 CC_E='-E -o $@'
2374 CC_O='-o $@'
2375 CXX_C='-c'
2376 CXX_O='-o $@'
2377 LD_O='-o $@'
2378 LD_LIB='-l%'
2379 LD_PATH='-L'
2380 HOSTCC_C='-c'
2381 HOSTCC_O='-o $@'
2382 HOSTLD_O='-o $@'
2383
2384 host_cflags='-O3 -g'
2385 host_cppflags='-D_ISOC99_SOURCE -D_XOPEN_SOURCE=600'
2386 host_libs='-lm'
2387 host_cflags_filter=echo
2388 host_ldflags_filter=echo
2389
2390 target_path='$(CURDIR)'
2391
2392 # since the object filename is not given with the -MM flag, the compiler
2393 # is only able to print the basename, and we must add the path ourselves
2394 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2395 DEPFLAGS='-MM'
2396
2397 # find source path
2398 if test -f configure; then
2399     source_path=.
2400 else
2401     source_path=$(cd $(dirname "$0"); pwd)
2402     echo "$source_path" | grep -q '[[:blank:]]' &&
2403         die "Out of tree builds are impossible with whitespace in source path."
2404     test -e "$source_path/config.h" &&
2405         die "Out of tree builds are impossible with config.h in source dir."
2406 fi
2407
2408 for v in "$@"; do
2409     r=${v#*=}
2410     l=${v%"$r"}
2411     r=$(sh_quote "$r")
2412     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2413 done
2414
2415 find_things(){
2416     thing=$1
2417     pattern=$2
2418     file=$source_path/$3
2419     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2420 }
2421
2422 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2423 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2424 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2425 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2426 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2427 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2428 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2429 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2430 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2431 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2432 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2433
2434 ALL_COMPONENTS="
2435     $BSF_LIST
2436     $DECODER_LIST
2437     $DEMUXER_LIST
2438     $ENCODER_LIST
2439     $FILTER_LIST
2440     $HWACCEL_LIST
2441     $INDEV_LIST
2442     $MUXER_LIST
2443     $OUTDEV_LIST
2444     $PARSER_LIST
2445     $PROTOCOL_LIST
2446 "
2447
2448 for n in $COMPONENT_LIST; do
2449     v=$(toupper ${n%s})_LIST
2450     eval enable \$$v
2451     eval ${n}_if_any="\$$v"
2452 done
2453
2454 enable $ARCH_EXT_LIST
2455
2456 die_unknown(){
2457     echo "Unknown option \"$1\"."
2458     echo "See $0 --help for available options."
2459     exit 1
2460 }
2461
2462 print_3_columns() {
2463     cat | tr ' ' '\n' | sort | pr -r -3 -t
2464 }
2465
2466 show_list() {
2467     suffix=_$1
2468     shift
2469     echo $* | sed s/$suffix//g | print_3_columns
2470     exit 0
2471 }
2472
2473 rand_list(){
2474     IFS=', '
2475     set -- $*
2476     unset IFS
2477     for thing; do
2478         comp=${thing%:*}
2479         prob=${thing#$comp}
2480         prob=${prob#:}
2481         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2482         echo "prob ${prob:-0.5}"
2483         printf '%s\n' $comp
2484     done
2485 }
2486
2487 do_random(){
2488     action=$1
2489     shift
2490     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2491     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2492 }
2493
2494 for opt do
2495     optval="${opt#*=}"
2496     case "$opt" in
2497         --extra-ldflags=*)
2498             add_ldflags $optval
2499         ;;
2500         --extra-libs=*)
2501             add_extralibs $optval
2502         ;;
2503         --disable-devices)
2504             disable $INDEV_LIST $OUTDEV_LIST
2505         ;;
2506         --enable-debug=*)
2507             debuglevel="$optval"
2508         ;;
2509         --disable-programs)
2510             disable $PROGRAM_LIST
2511         ;;
2512         --disable-everything)
2513             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2514         ;;
2515         --disable-all)
2516             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2517             disable $LIBRARY_LIST $PROGRAM_LIST doc
2518         ;;
2519         --enable-random|--disable-random)
2520             action=${opt%%-random}
2521             do_random ${action#--} $COMPONENT_LIST
2522         ;;
2523         --enable-random=*|--disable-random=*)
2524             action=${opt%%-random=*}
2525             do_random ${action#--} $optval
2526         ;;
2527         --enable-*=*|--disable-*=*)
2528             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2529             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2530             eval list=\$$(toupper $thing)_LIST
2531             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2532             list=$(filter "$name" $list)
2533             [ "$list" = "" ] && warn "Option $opt did not match anything"
2534             $action $list
2535         ;;
2536         --enable-?*|--disable-?*)
2537             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2538             if is_in $option $COMPONENT_LIST; then
2539                 test $action = disable && action=unset
2540                 eval $action \$$(toupper ${option%s})_LIST
2541             elif is_in $option $CMDLINE_SELECT; then
2542                 $action $option
2543             else
2544                 die_unknown $opt
2545             fi
2546         ;;
2547         --list-*)
2548             NAME="${opt#--list-}"
2549             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2550             NAME=${NAME%s}
2551             eval show_list $NAME \$$(toupper $NAME)_LIST
2552         ;;
2553         --help|-h) show_help
2554         ;;
2555         --fatal-warnings) enable fatal_warnings
2556         ;;
2557         *)
2558             optname="${opt%%=*}"
2559             optname="${optname#--}"
2560             optname=$(echo "$optname" | sed 's/-/_/g')
2561             if is_in $optname $CMDLINE_SET; then
2562                 eval $optname='$optval'
2563             elif is_in $optname $CMDLINE_APPEND; then
2564                 append $optname "$optval"
2565             else
2566                 die_unknown $opt
2567             fi
2568         ;;
2569     esac
2570 done
2571
2572 disabled logging && logfile=/dev/null
2573
2574 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2575 set >> $logfile
2576
2577 test -n "$cross_prefix" && enable cross_compile
2578
2579 if enabled cross_compile; then
2580     test -n "$arch" && test -n "$target_os" ||
2581         die "Must specify target arch and OS when cross-compiling"
2582 fi
2583
2584 ar_default="${cross_prefix}${ar_default}"
2585 cc_default="${cross_prefix}${cc_default}"
2586 cxx_default="${cross_prefix}${cxx_default}"
2587 nm_default="${cross_prefix}${nm_default}"
2588 pkg_config_default="${cross_prefix}${pkg_config_default}"
2589 ranlib="${cross_prefix}${ranlib}"
2590 strip_default="${cross_prefix}${strip_default}"
2591
2592 sysinclude_default="${sysroot}/usr/include"
2593
2594 test -n "$valgrind" && toolchain="valgrind-memcheck"
2595
2596 case "$toolchain" in
2597     clang-asan)
2598         cc_default="clang"
2599         add_cflags  -fsanitize=address
2600         add_ldflags -fsanitize=address
2601     ;;
2602     clang-tsan)
2603         cc_default="clang"
2604         add_cflags  -fsanitize=thread -pie
2605         add_ldflags -fsanitize=thread -pie
2606     ;;
2607     gcc-asan)
2608         cc_default="gcc"
2609         add_cflags  -fsanitize=address
2610         add_ldflags -fsanitize=address
2611     ;;
2612     gcc-tsan)
2613         cc_default="gcc"
2614         add_cflags  -fsanitize=thread -pie -fPIC
2615         add_ldflags -fsanitize=thread -pie -fPIC
2616     ;;
2617     valgrind-massif)
2618         target_exec_default=${valgrind:-"valgrind"}
2619         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"
2620     ;;
2621     valgrind-memcheck)
2622         target_exec_default=${valgrind:-"valgrind"}
2623         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
2624     ;;
2625     msvc)
2626         cc_default="c99wrap cl"
2627         ld_default="c99wrap link"
2628         nm_default="dumpbin -symbols"
2629         ar_default="lib"
2630         target_os_default="win32"
2631     ;;
2632     icl)
2633         cc_default="c99wrap -noconv icl"
2634         ld_default="c99wrap xilink"
2635         nm_default="dumpbin -symbols"
2636         ar_default="xilib"
2637         target_os_default="win32"
2638     ;;
2639     gcov)
2640         add_cflags  -fprofile-arcs -ftest-coverage
2641         add_ldflags -fprofile-arcs -ftest-coverage
2642     ;;
2643     hardened)
2644         add_cflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2645         add_ldflags -Wl,-z,relro -Wl,-z,now
2646     ;;
2647     ?*)
2648         die "Unknown toolchain $toolchain"
2649     ;;
2650 esac
2651
2652 set_default arch cc cxx pkg_config strip sysinclude target_exec target_os yasmexe
2653 enabled cross_compile || host_cc_default=$cc
2654 set_default host_cc
2655
2656 if ! $pkg_config --version >/dev/null 2>&1; then
2657     warn "$pkg_config not found, library detection may fail."
2658     pkg_config=false
2659 fi
2660
2661 exesuf() {
2662     case $1 in
2663         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2664     esac
2665 }
2666
2667 EXESUF=$(exesuf $target_os)
2668 HOSTEXESUF=$(exesuf $host_os)
2669
2670 # set temporary file name
2671 : ${TMPDIR:=$TEMPDIR}
2672 : ${TMPDIR:=$TMP}
2673 : ${TMPDIR:=/tmp}
2674
2675 if [ -n "$tempprefix" ] ; then
2676     mktemp(){
2677         echo $tempprefix.${HOSTNAME}.${UID}
2678     }
2679 elif ! check_cmd mktemp -u XXXXXX; then
2680     # simple replacement for missing mktemp
2681     # NOT SAFE FOR GENERAL USE
2682     mktemp(){
2683         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2684     }
2685 fi
2686
2687 tmpfile(){
2688     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2689         (set -C; exec > $tmp) 2>/dev/null ||
2690         die "Unable to create temporary file in $TMPDIR."
2691     append TMPFILES $tmp
2692     eval $1=$tmp
2693 }
2694
2695 trap 'rm -f -- $TMPFILES' EXIT
2696
2697 tmpfile TMPASM .asm
2698 tmpfile TMPC   .c
2699 tmpfile TMPCPP .cpp
2700 tmpfile TMPE   $EXESUF
2701 tmpfile TMPH   .h
2702 tmpfile TMPO   .o
2703 tmpfile TMPS   .S
2704 tmpfile TMPSH  .sh
2705 tmpfile TMPV   .ver
2706
2707 unset -f mktemp
2708
2709 chmod +x $TMPE
2710
2711 # make sure we can execute files in $TMPDIR
2712 cat > $TMPSH 2>> $logfile <<EOF
2713 #! /bin/sh
2714 EOF
2715 chmod +x $TMPSH >> $logfile 2>&1
2716 if ! $TMPSH >> $logfile 2>&1; then
2717     cat <<EOF
2718 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2719 variable to another directory and make sure that it is not mounted noexec.
2720 EOF
2721     die "Sanity test failed."
2722 fi
2723
2724 ccc_flags(){
2725     for flag; do
2726         case $flag in
2727             -std=c99)           echo -c99                       ;;
2728             -mcpu=*)            echo -arch ${flag#*=}           ;;
2729             -mieee)             echo -ieee                      ;;
2730             -O*|-fast)          echo $flag                      ;;
2731             -fno-math-errno)    echo -assume nomath_errno       ;;
2732             -g)                 echo -g3                        ;;
2733             -Wall)              echo -msg_enable level2         ;;
2734             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2735             -Wl,*)              echo $flag                      ;;
2736             -f*|-W*)                                            ;;
2737             *)                  echo $flag                      ;;
2738         esac
2739    done
2740 }
2741
2742 cparser_flags(){
2743     for flag; do
2744         case $flag in
2745             -Wno-switch)             echo -Wno-switch-enum ;;
2746             -Wno-format-zero-length) ;;
2747             -Wdisabled-optimization) ;;
2748             -Wno-pointer-sign)       echo -Wno-other ;;
2749             *)                       echo $flag ;;
2750         esac
2751     done
2752 }
2753
2754 msvc_common_flags(){
2755     for flag; do
2756         case $flag in
2757             # In addition to specifying certain flags under the compiler
2758             # specific filters, they must be specified here as well or else the
2759             # generic catch all at the bottom will print the original flag.
2760             -Wall)                ;;
2761             -std=c99)             ;;
2762             # Common flags
2763             -fomit-frame-pointer) ;;
2764             -g)                   echo -Z7 ;;
2765             -fno-math-errno)      ;;
2766             -fno-common)          ;;
2767             -fno-signed-zeros)    ;;
2768             -fPIC)                ;;
2769             -mthumb)              ;;
2770             -march=*)             ;;
2771             -lz)                  echo zlib.lib ;;
2772             -lavifil32)           echo vfw32.lib ;;
2773             -lavicap32)           echo vfw32.lib user32.lib ;;
2774             -l*)                  echo ${flag#-l}.lib ;;
2775             *)                    echo $flag ;;
2776         esac
2777     done
2778 }
2779
2780 msvc_flags(){
2781     msvc_common_flags "$@"
2782     for flag; do
2783         case $flag in
2784             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2785                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2786                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2787                                        -wd4554 \
2788                                        -wd4273 ;;
2789         esac
2790     done
2791 }
2792
2793 icl_flags(){
2794     msvc_common_flags "$@"
2795     for flag; do
2796         case $flag in
2797             # Despite what Intel's documentation says -Wall, which is supported
2798             # on Windows, does enable remarks so disable them here.
2799             -Wall)                echo $flag -Qdiag-disable:remark ;;
2800             -std=c99)             echo -Qstd=c99 ;;
2801         esac
2802     done
2803 }
2804
2805 pgi_flags(){
2806     for flag; do
2807         case $flag in
2808             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2809             -fomit-frame-pointer) echo -Mnoframe ;;
2810             -g)                   echo -gopt ;;
2811             *)                    echo $flag ;;
2812         esac
2813     done
2814 }
2815
2816 suncc_flags(){
2817     for flag; do
2818         case $flag in
2819             -march=*|-mcpu=*)
2820                 case "${flag#*=}" in
2821                     native)                   echo -xtarget=native       ;;
2822                     v9|niagara)               echo -xarch=sparc          ;;
2823                     ultrasparc)               echo -xarch=sparcvis       ;;
2824                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2825                     i586|pentium)             echo -xchip=pentium        ;;
2826                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2827                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2828                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2829                     pentium4*)          echo -xtarget=pentium4           ;;
2830                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2831                     *-sse3)             echo -xarch=sse3                 ;;
2832                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2833                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2834                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2835                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
2836                     bdver*)                    echo -xarch=avx           ;;
2837                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2838                     k8|opteron|athlon64|athlon-fx)
2839                                                echo -xarch=sse2a         ;;
2840                     athlon*)                   echo -xarch=pentium_proa  ;;
2841                 esac
2842                 ;;
2843             -std=c99)             echo -xc99              ;;
2844             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2845             -fPIC)                echo -KPIC -xcode=pic32 ;;
2846             -W*,*)                echo $flag              ;;
2847             -f*-*|-W*|-mimpure-text)                      ;;
2848             -shared)              echo -G                 ;;
2849             *)                    echo $flag              ;;
2850         esac
2851     done
2852 }
2853
2854 tms470_flags(){
2855     for flag; do
2856         case $flag in
2857             -march=*|-mcpu=*)
2858                 case "${flag#*=}" in
2859                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2860                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2861                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2862                     armv6*|arm11*)          echo -mv=6   ;;
2863                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2864                                             echo -mv=5e  ;;
2865                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2866                 esac
2867                 ;;
2868             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2869             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2870             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2871             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2872             -msoft-float)   echo --float_support=vfplib       ;;
2873             -O[0-3]|-mf=*)  echo $flag                        ;;
2874             -g)             echo -g -mn                       ;;
2875             -pds=*)         echo $flag                        ;;
2876             -D*|-I*)        echo $flag                        ;;
2877             --gcc|--abi=*)  echo $flag                        ;;
2878             -me)            echo $flag                        ;;
2879         esac
2880     done
2881 }
2882
2883 probe_cc(){
2884     pfx=$1
2885     _cc=$2
2886
2887     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2888     unset _ld_o _ldflags _ld_lib _ld_path
2889     unset _depflags _DEPCMD _DEPFLAGS
2890     _flags_filter=echo
2891
2892     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2893         _type=llvm_gcc
2894         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
2895         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
2896         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2897         _cflags_speed='-O3'
2898         _cflags_size='-Os'
2899     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2900         _type=gcc
2901         gcc_version=$($_cc --version | head -n1)
2902         gcc_basever=$($_cc -dumpversion)
2903         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2904         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2905         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2906         if ! $_cc -dumpversion | grep -q '^2\.'; then
2907             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2908         fi
2909         _cflags_speed='-O3'
2910         _cflags_size='-Os'
2911     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2912         _type=icc
2913         _ident=$($_cc --version | head -n1)
2914         _depflags='-MMD'
2915         _cflags_speed='-O3'
2916         _cflags_size='-Os'
2917         _cflags_noopt='-O1'
2918     elif $_cc -v 2>&1 | grep -q xlc; then
2919         _type=xlc
2920         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2921         _cflags_speed='-O5'
2922         _cflags_size='-O5 -qcompact'
2923     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2924         _type=ccc
2925         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2926         _DEPFLAGS='-M'
2927         _cflags_speed='-fast'
2928         _cflags_size='-O1'
2929         _flags_filter=ccc_flags
2930     elif $_cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
2931         test -d "$sysroot" || die "No valid sysroot specified."
2932         _type=armcc
2933         _ident=$($_cc --vsn | head -n1)
2934         armcc_conf="$PWD/armcc.conf"
2935         $_cc --arm_linux_configure                 \
2936              --arm_linux_config_file="$armcc_conf" \
2937              --configure_sysroot="$sysroot"        \
2938              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
2939              die "Error creating armcc configuration file."
2940         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
2941         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
2942         as_default="${cross_prefix}gcc"
2943         _depflags='-MMD'
2944         _cflags_speed='-O3'
2945         _cflags_size='-Os'
2946     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
2947         _type=tms470
2948         _ident=$($_cc -version | head -n1 | tr -s ' ')
2949         _flags='--gcc --abi=eabi -me'
2950         _cc_e='-ppl -fe=$@'
2951         _cc_o='-fe=$@'
2952         _depflags='-ppa -ppd=$(@:.o=.d)'
2953         _cflags_speed='-O3 -mf=5'
2954         _cflags_size='-O3 -mf=2'
2955         _flags_filter=tms470_flags
2956     elif $_cc -v 2>&1 | grep -q clang; then
2957         _type=clang
2958         _ident=$($_cc --version | head -n1)
2959         _depflags='-MMD'
2960         _cflags_speed='-O3'
2961         _cflags_size='-Os'
2962     elif $_cc -V 2>&1 | grep -q Sun; then
2963         _type=suncc
2964         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
2965         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
2966         _DEPFLAGS='-xM1 -xc99'
2967         _ldflags='-std=c99'
2968         _cflags_speed='-O5'
2969         _cflags_size='-O5 -xspace'
2970         _flags_filter=suncc_flags
2971     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
2972         _type=pathscale
2973         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2974         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2975         _cflags_speed='-O2'
2976         _cflags_size='-Os'
2977         _flags_filter='filter_out -Wdisabled-optimization'
2978     elif $_cc -v 2>&1 | grep -q Open64; then
2979         _type=open64
2980         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2981         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2982         _cflags_speed='-O2'
2983         _cflags_size='-Os'
2984         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
2985     elif $_cc -V 2>&1 | grep -q Portland; then
2986         _type=pgi
2987         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
2988         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
2989         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
2990         _cflags_size="-O2 -Munroll=c:1 $opt_common"
2991         _cflags_noopt="-O"
2992         _flags_filter=pgi_flags
2993     elif $_cc 2>&1 | grep -q Microsoft; then
2994         _type=msvc
2995         _ident=$($cc 2>&1 | head -n1)
2996         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
2997         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
2998         _cflags_speed="-O2"
2999         _cflags_size="-O1"
3000         # Nonstandard output options, to avoid msys path conversion issues.
3001         # Relies on wrapper to remap it.
3002         if $_cc 2>&1 | grep -q Linker; then
3003             _ld_o='-out $@'
3004         else
3005             _ld_o='-Fe$@'
3006         fi
3007         _cc_o='-Fo $@'
3008         _cc_e='-P -Fi $@'
3009         _flags_filter=msvc_flags
3010         _ld_lib='lib%.a'
3011         _ld_path='-libpath:'
3012         _flags='-nologo'
3013         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3014         if [ $pfx = hostcc ]; then
3015             append _cflags -Dsnprintf=_snprintf
3016         fi
3017         disable stripping
3018     elif $_cc 2>&1 | grep -q Intel; then
3019         _type=icl
3020         _ident=$($cc 2>&1 | head -n1)
3021         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3022         # Not only is O3 broken on 13.x+ but it is slower on all previous
3023         # versions (tested) as well.
3024         _cflags_speed="-O2"
3025         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3026         # Nonstandard output options, to avoid msys path conversion issues.
3027         # Relies on wrapper to remap it.
3028         if $_cc 2>&1 | grep -q Linker; then
3029             _ld_o='-out $@'
3030         else
3031             _ld_o='-Fe$@'
3032         fi
3033         _cc_o='-Fo $@'
3034         _cc_e='-P'
3035         _flags_filter=icl_flags
3036         _ld_lib='lib%.a'
3037         _ld_path='-libpath:'
3038         # -Qdiag-error to make icl error when seeing certain unknown arguments
3039         _flags='-nologo -Qdiag-error:4044,10157'
3040         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3041         # with MSVC which enables it by default.
3042         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
3043         if [ $pfx = hostcc ]; then
3044             append _cflags -Dsnprintf=_snprintf
3045         fi
3046     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3047         _type=cparser
3048         _ident=$($_cc --version | head -n1)
3049         _depflags='-MMD'
3050         _cflags_speed='-O4'
3051         _cflags_size='-O2'
3052         _flags_filter=cparser_flags
3053     fi
3054
3055     eval ${pfx}_type=\$_type
3056     eval ${pfx}_ident=\$_ident
3057 }
3058
3059 set_ccvars(){
3060     eval ${1}_C=\${_cc_c-\${${1}_C}}
3061     eval ${1}_E=\${_cc_e-\${${1}_E}}
3062     eval ${1}_O=\${_cc_o-\${${1}_O}}
3063
3064     if [ -n "$_depflags" ]; then
3065         eval ${1}_DEPFLAGS=\$_depflags
3066     else
3067         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3068         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3069         eval DEP${1}FLAGS=\$_flags
3070     fi
3071 }
3072
3073 probe_cc cc "$cc"
3074 cflags_filter=$_flags_filter
3075 cflags_speed=$_cflags_speed
3076 cflags_size=$_cflags_size
3077 cflags_noopt=$_cflags_noopt
3078 add_cflags $_flags $_cflags
3079 cc_ldflags=$_ldflags
3080 set_ccvars CC
3081
3082 probe_cc hostcc "$host_cc"
3083 host_cflags_filter=$_flags_filter
3084 add_host_cflags  $_flags $_cflags
3085 set_ccvars HOSTCC
3086
3087 test -n "$cc_type" && enable $cc_type ||
3088     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3089
3090 : ${as_default:=$cc}
3091 : ${dep_cc_default:=$cc}
3092 : ${ld_default:=$cc}
3093 : ${host_ld_default:=$host_cc}
3094 set_default ar as dep_cc ld host_ld
3095
3096 probe_cc as "$as"
3097 asflags_filter=$_flags_filter
3098 add_asflags $_flags $_cflags
3099 set_ccvars AS
3100
3101 probe_cc ld "$ld"
3102 ldflags_filter=$_flags_filter
3103 add_ldflags $_flags $_ldflags
3104 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3105 LD_O=${_ld_o-$LD_O}
3106 LD_LIB=${_ld_lib-$LD_LIB}
3107 LD_PATH=${_ld_path-$LD_PATH}
3108
3109 probe_cc hostld "$host_ld"
3110 host_ldflags_filter=$_flags_filter
3111 add_host_ldflags $_flags $_ldflags
3112 HOSTLD_O=${_ld_o-$HOSTLD_O}
3113
3114 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3115     probe_cc depcc "$dep_cc"
3116     CCDEP=${_DEPCMD:-$DEPCMD}
3117     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3118     DEPCCFLAGS=$_flags
3119 fi
3120
3121 if $ar 2>&1 | grep -q Microsoft; then
3122     arflags="-nologo"
3123     ar_o='-out:$@'
3124 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3125     arflags="rq"
3126     ar_o='$@'
3127 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3128     arflags='-Xany -r -c'
3129     ar_o='$@'
3130 else
3131     arflags="rc"
3132     ar_o='$@'
3133 fi
3134
3135 add_cflags $extra_cflags
3136 add_cxxflags $extra_cxxflags
3137 add_asflags $extra_cflags
3138
3139 if test -n "$sysroot"; then
3140     case "$cc_type" in
3141         gcc|llvm_gcc|clang)
3142             add_cppflags --sysroot="$sysroot"
3143             add_ldflags --sysroot="$sysroot"
3144         ;;
3145         tms470)
3146             add_cppflags -I"$sysinclude"
3147             add_ldflags  --sysroot="$sysroot"
3148         ;;
3149     esac
3150 fi
3151
3152 if test "$cpu" = host; then
3153     enabled cross_compile &&
3154         die "--cpu=host makes no sense when cross-compiling."
3155
3156     case "$cc_type" in
3157         gcc|llvm_gcc)
3158             check_native(){
3159                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3160                 sed -n "/cc1.*$1=/{
3161                             s/.*$1=\\([^ ]*\\).*/\\1/
3162                             p
3163                             q
3164                         }" $TMPE
3165             }
3166             cpu=$(check_native -march || check_native -mcpu)
3167         ;;
3168     esac
3169
3170     test "${cpu:-host}" = host &&
3171         die "--cpu=host not supported with compiler $cc"
3172 fi
3173
3174 # Deal with common $arch aliases
3175 case "$arch" in
3176     aarch64|arm64)
3177         arch="aarch64"
3178     ;;
3179     arm*|iPad*|iPhone*)
3180         arch="arm"
3181     ;;
3182     mips*|IP*)
3183         arch="mips"
3184     ;;
3185     parisc*|hppa*)
3186         arch="parisc"
3187     ;;
3188     "Power Macintosh"|ppc*|powerpc*)
3189         arch="ppc"
3190     ;;
3191     s390|s390x)
3192         arch="s390"
3193     ;;
3194     sh4|sh)
3195         arch="sh4"
3196     ;;
3197     sun4u|sparc*)
3198         arch="sparc"
3199     ;;
3200     tilegx|tile-gx)
3201         arch="tilegx"
3202     ;;
3203     i[3-6]86|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3204         arch="x86"
3205     ;;
3206 esac
3207
3208 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3209 enable $arch
3210
3211 # Add processor-specific flags
3212 if enabled aarch64; then
3213
3214     case $cpu in
3215         armv*)
3216             cpuflags="-march=$cpu"
3217         ;;
3218         *)
3219             cpuflags="-mcpu=$cpu"
3220         ;;
3221     esac
3222
3223 elif enabled alpha; then
3224
3225     cpuflags="-mcpu=$cpu"
3226
3227 elif enabled arm; then
3228
3229     check_arm_arch() {
3230         check_cpp_condition stddef.h \
3231             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3232             $cpuflags
3233     }
3234
3235     probe_arm_arch() {
3236         if   check_arm_arch 4;        then echo armv4;
3237         elif check_arm_arch 4T;       then echo armv4t;
3238         elif check_arm_arch 5;        then echo armv5;
3239         elif check_arm_arch 5E;       then echo armv5e;
3240         elif check_arm_arch 5T;       then echo armv5t;
3241         elif check_arm_arch 5TE;      then echo armv5te;
3242         elif check_arm_arch 5TEJ;     then echo armv5te;
3243         elif check_arm_arch 6;        then echo armv6;
3244         elif check_arm_arch 6J;       then echo armv6j;
3245         elif check_arm_arch 6K;       then echo armv6k;
3246         elif check_arm_arch 6Z;       then echo armv6z;
3247         elif check_arm_arch 6ZK;      then echo armv6zk;
3248         elif check_arm_arch 6T2;      then echo armv6t2;
3249         elif check_arm_arch 7;        then echo armv7;
3250         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3251         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3252         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3253         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3254         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3255         fi
3256     }
3257
3258     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3259
3260     case $cpu in
3261         armv*)
3262             cpuflags="-march=$cpu"
3263             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3264         ;;
3265         *)
3266             cpuflags="-mcpu=$cpu"
3267             case $cpu in
3268                 cortex-a*)                               subarch=armv7a  ;;
3269                 cortex-r*)                               subarch=armv7r  ;;
3270                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3271                 arm11*)                                  subarch=armv6   ;;
3272                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3273                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3274                 *)                             subarch=$(probe_arm_arch) ;;
3275             esac
3276         ;;
3277     esac
3278
3279     case "$subarch" in
3280         armv5t*)    enable fast_clz                ;;
3281         armv[6-8]*) enable fast_clz fast_unaligned ;;
3282     esac
3283
3284 elif enabled avr32; then
3285
3286     case $cpu in
3287         ap7[02]0[0-2])
3288             subarch="avr32_ap"
3289             cpuflags="-mpart=$cpu"
3290         ;;
3291         ap)
3292             subarch="avr32_ap"
3293             cpuflags="-march=$cpu"
3294         ;;
3295         uc3[ab]*)
3296             subarch="avr32_uc"
3297             cpuflags="-mcpu=$cpu"
3298         ;;
3299         uc)
3300             subarch="avr32_uc"
3301             cpuflags="-march=$cpu"
3302         ;;
3303     esac
3304
3305 elif enabled bfin; then
3306
3307     cpuflags="-mcpu=$cpu"
3308
3309 elif enabled mips; then
3310
3311     cpuflags="-march=$cpu"
3312
3313     case $cpu in
3314         24kc)
3315             disable mipsfpu
3316             disable mipsdspr1
3317             disable mipsdspr2
3318         ;;
3319         24kf*)
3320             disable mipsdspr1
3321             disable mipsdspr2
3322         ;;
3323         24kec|34kc|1004kc)
3324             disable mipsfpu
3325             disable mipsdspr2
3326         ;;
3327         24kef*|34kf*|1004kf*)
3328             disable mipsdspr2
3329         ;;
3330         74kc)
3331             disable mipsfpu
3332         ;;
3333     esac
3334
3335 elif enabled ppc; then
3336
3337     case $(tolower $cpu) in
3338         601|ppc601|powerpc601)
3339             cpuflags="-mcpu=601"
3340             disable altivec
3341         ;;
3342         603*|ppc603*|powerpc603*)
3343             cpuflags="-mcpu=603"
3344             disable altivec
3345         ;;
3346         604*|ppc604*|powerpc604*)
3347             cpuflags="-mcpu=604"
3348             disable altivec
3349         ;;
3350         g3|75*|ppc75*|powerpc75*)
3351             cpuflags="-mcpu=750"
3352             disable altivec
3353         ;;
3354         g4|745*|ppc745*|powerpc745*)
3355             cpuflags="-mcpu=7450"
3356         ;;
3357         74*|ppc74*|powerpc74*)
3358             cpuflags="-mcpu=7400"
3359         ;;
3360         g5|970|ppc970|powerpc970)
3361             cpuflags="-mcpu=970"
3362         ;;
3363         power[3-7]*)
3364             cpuflags="-mcpu=$cpu"
3365         ;;
3366         cell)
3367             cpuflags="-mcpu=cell"
3368             enable ldbrx
3369         ;;
3370         e500mc)
3371             cpuflags="-mcpu=e500mc"
3372             disable altivec
3373         ;;
3374         e500v2)
3375             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3376             disable altivec
3377         ;;
3378         e500)
3379             cpuflags="-mcpu=8540 -mhard-float"
3380             disable altivec
3381         ;;
3382     esac
3383
3384 elif enabled sparc; then
3385
3386     case $cpu in
3387         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3388             cpuflags="-mcpu=$cpu"
3389             disable vis
3390         ;;
3391         ultrasparc*|niagara[234])
3392             cpuflags="-mcpu=$cpu"
3393         ;;
3394     esac
3395
3396 elif enabled x86; then
3397
3398     case $cpu in
3399         i[345]86|pentium)
3400             cpuflags="-march=$cpu"
3401             disable mmx
3402         ;;
3403         # targets that do NOT support nopl and conditional mov (cmov)
3404         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3405             cpuflags="-march=$cpu"
3406             disable i686
3407         ;;
3408         # targets that do support nopl and conditional mov (cmov)
3409         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3410             cpuflags="-march=$cpu"
3411             enable i686
3412             enable fast_cmov
3413         ;;
3414         # targets that do support conditional mov but on which it's slow
3415         pentium4|pentium4m|prescott|nocona)
3416             cpuflags="-march=$cpu"
3417             enable i686
3418             disable fast_cmov
3419         ;;
3420     esac
3421
3422 fi
3423
3424 if [ "$cpu" != generic ]; then
3425     add_cflags  $cpuflags
3426     add_asflags $cpuflags
3427 fi
3428
3429 # compiler sanity check
3430 check_exec <<EOF
3431 int main(void){ return 0; }
3432 EOF
3433 if test "$?" != 0; then
3434     echo "$cc is unable to create an executable file."
3435     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3436         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3437         echo "Only do this if you know what cross compiling means."
3438     fi
3439     die "C compiler test failed."
3440 fi
3441
3442 add_cppflags -D_ISOC99_SOURCE
3443 add_cxxflags -D__STDC_CONSTANT_MACROS
3444 check_cflags -std=c99
3445 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3446 #include <stdlib.h>
3447 EOF
3448 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3449 #include <stdlib.h>
3450 EOF
3451
3452 check_host_cflags -std=c99
3453 check_host_cflags -Wall
3454
3455 check_64bit(){
3456     arch32=$1
3457     arch64=$2
3458     expr=$3
3459     check_code cc "" "int test[2*($expr) - 1]" &&
3460         subarch=$arch64 || subarch=$arch32
3461 }
3462
3463 case "$arch" in
3464     aarch64|alpha|ia64)
3465         spic=$shared
3466     ;;
3467     mips)
3468         check_64bit mips mips64 '_MIPS_SIM > 1'
3469         spic=$shared
3470     ;;
3471     parisc)
3472         check_64bit parisc parisc64 'sizeof(void *) > 4'
3473         spic=$shared
3474     ;;
3475     ppc)
3476         check_64bit ppc ppc64 'sizeof(void *) > 4'
3477         spic=$shared
3478     ;;
3479     sparc)
3480         check_64bit sparc sparc64 'sizeof(void *) > 4'
3481         spic=$shared
3482     ;;
3483     x86)
3484         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3485         if test "$subarch" = "x86_64"; then
3486             spic=$shared
3487         fi
3488     ;;
3489     ppc)
3490         check_cc <<EOF && subarch="ppc64"
3491         int test[(int)sizeof(char*) - 7];
3492 EOF
3493     ;;
3494 esac
3495
3496 enable $subarch
3497 enabled spic && enable_weak pic
3498
3499 # OS specific
3500 case $target_os in
3501     aix)
3502         SHFLAGS=-shared
3503         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3504         enabled shared && add_ldflags -Wl,-brtl
3505         ;;
3506     haiku)
3507         prefix_default="/boot/common"
3508         network_extralibs="-lnetwork"
3509         host_libs=
3510         ;;
3511     sunos)
3512         SHFLAGS='-shared -Wl,-h,$$(@F)'
3513         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3514         network_extralibs="-lsocket -lnsl"
3515         add_cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3516         # When using suncc to build, the Solaris linker will mark
3517         # an executable with each instruction set encountered by
3518         # the Solaris assembler.  As our libraries contain their own
3519         # guards for processor-specific code, instead suppress
3520         # generation of the HWCAPS ELF section on Solaris x86 only.
3521         enabled_all suncc x86 &&
3522             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3523             add_ldflags -Wl,-M,mapfile
3524         nm_default='nm -P -g'
3525         ;;
3526     netbsd)
3527         disable symver
3528         oss_indev_extralibs="-lossaudio"
3529         oss_outdev_extralibs="-lossaudio"
3530         enabled gcc || check_ldflags -Wl,-zmuldefs
3531         ;;
3532     openbsd|bitrig)
3533         disable symver
3534         SHFLAGS='-shared'
3535         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3536         SLIB_INSTALL_LINKS=
3537         oss_indev_extralibs="-lossaudio"
3538         oss_outdev_extralibs="-lossaudio"
3539         ;;
3540     dragonfly)
3541         disable symver
3542         ;;
3543     freebsd)
3544         ;;
3545     bsd/os)
3546         add_extralibs -lpoll -lgnugetopt
3547         strip="strip -d"
3548         ;;
3549     darwin)
3550         gas="gas-preprocessor.pl $cc"
3551         enabled ppc && add_asflags -force_cpusubtype_ALL
3552         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3553         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3554         strip="${strip} -x"
3555         add_ldflags -Wl,-dynamic,-search_paths_first
3556         SLIBSUF=".dylib"
3557         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3558         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3559         objformat="macho"
3560         enabled x86_64 && objformat="macho64"
3561         enabled_any pic shared ||
3562             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3563         ;;
3564     mingw32*)
3565         if test $target_os = "mingw32ce"; then
3566             disable network
3567         else
3568             target_os=mingw32
3569         fi
3570         LIBTARGET=i386
3571         if enabled x86_64; then
3572             LIBTARGET="i386:x86-64"
3573         elif enabled arm; then
3574             LIBTARGET=arm-wince
3575         fi
3576         check_ldflags -Wl,--nxcompat
3577         check_ldflags -Wl,--dynamicbase
3578         shlibdir_default="$bindir_default"
3579         SLIBPREF=""
3580         SLIBSUF=".dll"
3581         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3582         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3583         dlltool="${cross_prefix}dlltool"
3584         if check_cmd lib.exe -list; then
3585             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3586             if enabled x86_64; then
3587                 LIBTARGET=x64
3588             fi
3589         elif check_cmd $dlltool --version; then
3590             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3591         fi
3592         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3593         SLIB_INSTALL_LINKS=
3594         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3595         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3596         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3597         objformat="win32"
3598         ranlib=:
3599         enable dos_paths
3600         ;;
3601     win32|win64)
3602         if enabled shared; then
3603             # Link to the import library instead of the normal static library
3604             # for shared libs.
3605             LD_LIB='%.lib'
3606             # Cannot build both shared and static libs with MSVC or icl.
3607             disable static
3608         fi
3609         shlibdir_default="$bindir_default"
3610         SLIBPREF=""
3611         SLIBSUF=".dll"
3612         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3613         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3614         SLIB_CREATE_DEF_CMD='makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3615         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3616         SLIB_INSTALL_LINKS=
3617         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3618         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3619         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3620         objformat="win32"
3621         ranlib=:
3622         enable dos_paths
3623         ;;
3624     cygwin*)
3625         target_os=cygwin
3626         shlibdir_default="$bindir_default"
3627         SLIBPREF="cyg"
3628         SLIBSUF=".dll"
3629         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3630         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3631         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3632         SLIB_INSTALL_LINKS=
3633         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3634         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3635         objformat="win32"
3636         enable dos_paths
3637         ;;
3638     *-dos|freedos|opendos)
3639         network_extralibs="-lsocket"
3640         objformat="coff"
3641         enable dos_paths
3642         add_cppflags -U__STRICT_ANSI__
3643         ;;
3644     linux)
3645         enable dv1394
3646         ;;
3647     irix*)
3648         target_os=irix
3649         ranlib="echo ignoring ranlib"
3650         ;;
3651     os/2*)
3652         strip="lxlite -CS"
3653         ln_s="cp -f"
3654         objformat="aout"
3655         add_cppflags -D_GNU_SOURCE
3656         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3657         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3658         LIBSUF="_s.a"
3659         SLIBPREF=""
3660         SLIBSUF=".dll"
3661         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3662         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3663         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3664             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3665             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3666             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3667             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3668             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3669         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3670             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3671         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3672         enable dos_paths
3673         enable_weak os2threads
3674         ;;
3675     gnu/kfreebsd)
3676         add_cppflags -D_BSD_SOURCE
3677         ;;
3678     gnu)
3679         ;;
3680     qnx)
3681         add_cppflags -D_QNX_SOURCE
3682         network_extralibs="-lsocket"
3683         ;;
3684     symbian)
3685         SLIBSUF=".dll"
3686         enable dos_paths
3687         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3688         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3689         add_ldflags -Wl,--target1-abs,--no-undefined \
3690                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3691                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3692         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3693                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3694                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3695         ;;
3696     osf1)
3697         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3698         ;;
3699     minix)
3700         ;;
3701     plan9)
3702         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3703                      -D_REENTRANT_SOURCE        \
3704                      -D_RESEARCH_SOURCE         \
3705                      -DFD_SETSIZE=96            \
3706                      -DHAVE_SOCK_OPTS
3707         add_compat strtod.o strtod=avpriv_strtod
3708         network_extralibs='-lbsd'
3709         exeobjs=compat/plan9/main.o
3710         disable ffserver
3711         cp_f='cp'
3712         ;;
3713     none)
3714         ;;
3715     *)
3716         die "Unknown OS '$target_os'."
3717         ;;
3718 esac
3719
3720 # determine libc flavour
3721
3722 # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3723 if check_cpp_condition features.h "defined __UCLIBC__"; then
3724     libc_type=uclibc
3725     add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3726 elif check_cpp_condition features.h "defined __GLIBC__"; then
3727     libc_type=glibc
3728     add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3729 # MinGW headers can be installed on Cygwin, so check for newlib first.
3730 elif check_cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3731     libc_type=newlib
3732     add_cppflags -U__STRICT_ANSI__
3733 elif check_header _mingw.h; then
3734     libc_type=mingw
3735     check_cpp_condition _mingw.h \
3736         "defined (__MINGW64_VERSION_MAJOR) || (__MINGW32_MAJOR_VERSION > 3) || \
3737             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3738         die "ERROR: MinGW runtime version must be >= 3.15."
3739     add_cppflags -U__STRICT_ANSI__
3740     if check_cpp_condition _mingw.h "defined(__MINGW64_VERSION_MAJOR) && \
3741             __MINGW64_VERSION_MAJOR < 3"; then
3742         add_compat msvcrt/snprintf.o
3743         add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
3744     else
3745         add_cppflags -D__USE_MINGW_ANSI_STDIO=1
3746     fi
3747 elif check_func_headers stdlib.h _get_doserrno; then
3748     libc_type=msvcrt
3749     add_compat strtod.o strtod=avpriv_strtod
3750     add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3751                                  _snprintf=avpriv_snprintf  \
3752                                  vsnprintf=avpriv_vsnprintf
3753     # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3754     # 0x601 by default unless something else is set by the user.
3755     # This can easily lead to us detecting functions only present
3756     # in such new versions and producing binaries requiring windows 7.0.
3757     # Therefore explicitly set the default to XP unless the user has
3758     # set something else on the command line.
3759     check_cpp_condition stdlib.h "defined(_WIN32_WINNT)" || add_cppflags -D_WIN32_WINNT=0x0502
3760 elif check_cpp_condition stddef.h "defined __KLIBC__"; then
3761     libc_type=klibc
3762 elif check_cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3763     libc_type=bionic
3764     add_compat strtod.o strtod=avpriv_strtod
3765 fi
3766
3767 test -n "$libc_type" && enable $libc_type
3768
3769 # hacks for compiler/libc/os combinations
3770
3771 if enabled_all tms470 glibc; then
3772     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3773     add_cppflags -D__USER_LABEL_PREFIX__=
3774     add_cppflags -D__builtin_memset=memset
3775     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3776     add_cflags   -pds=48    # incompatible redefinition of macro
3777 fi
3778
3779 if enabled_all ccc glibc; then
3780     add_ldflags -Wl,-z,now  # calls to libots crash without this
3781 fi
3782
3783 esc(){
3784     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3785 }
3786
3787 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
3788
3789 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3790
3791 set_default $PATHS_LIST
3792 set_default nm
3793
3794 # we need to build at least one lib type
3795 if ! enabled_any static shared; then
3796     cat <<EOF
3797 At least one library type must be built.
3798 Specify --enable-static to build the static libraries or --enable-shared to
3799 build the shared libraries as well. To only build the shared libraries specify
3800 --disable-static in addition to --enable-shared.
3801 EOF
3802     exit 1;
3803 fi
3804
3805 # backward compatibility layer for incompatible_libav/fork_abi
3806 enabled incompatible_fork_abi  && enable incompatible_libav_abi
3807 enabled incompatible_libav_abi && enable incompatible_fork_abi
3808
3809 die_license_disabled() {
3810     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3811 }
3812
3813 die_license_disabled_gpl() {
3814     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
3815 }
3816
3817 die_license_disabled gpl frei0r
3818 die_license_disabled gpl libcdio
3819 die_license_disabled gpl libutvideo
3820 die_license_disabled gpl libvidstab
3821 die_license_disabled gpl libx264
3822 die_license_disabled gpl libxavs
3823 die_license_disabled gpl libxvid
3824 die_license_disabled gpl libzvbi
3825 die_license_disabled gpl x11grab
3826
3827 die_license_disabled nonfree libaacplus
3828 die_license_disabled nonfree libfaac
3829 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
3830 enabled gpl && die_license_disabled_gpl nonfree openssl
3831
3832 die_license_disabled version3 libopencore_amrnb
3833 die_license_disabled version3 libopencore_amrwb
3834 die_license_disabled version3 libvo_aacenc
3835 die_license_disabled version3 libvo_amrwbenc
3836
3837 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3838
3839 disabled optimizations || check_cflags -fomit-frame-pointer
3840
3841 enable_weak_pic() {
3842     disabled pic && return
3843     enable pic
3844     add_cppflags -DPIC
3845     case "$target_os" in
3846     mingw*|cygwin*)
3847         ;;
3848     *)
3849         add_cflags -fPIC
3850         ;;
3851     esac
3852     add_asflags  -fPIC
3853 }
3854
3855 enabled pic && enable_weak_pic
3856
3857 check_cc <<EOF || die "Symbol mangling check failed."
3858 int ff_extern;
3859 EOF
3860 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3861 extern_prefix=${sym%%ff_extern*}
3862
3863 check_cc <<EOF && enable_weak inline_asm
3864 void foo(void) { __asm__ volatile ("" ::); }
3865 EOF
3866
3867 _restrict=
3868 for restrict_keyword in restrict __restrict__ __restrict; do
3869     check_cc <<EOF && _restrict=$restrict_keyword && break
3870 void foo(char * $restrict_keyword p);
3871 EOF
3872 done
3873
3874 check_cc <<EOF && enable pragma_deprecated
3875 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3876 EOF
3877
3878 check_cc <<EOF && enable attribute_packed
3879 struct { int x; } __attribute__((packed)) x;
3880 EOF
3881
3882 check_cc <<EOF && enable attribute_may_alias
3883 union { int x; } __attribute__((may_alias)) x;
3884 EOF
3885
3886 check_cc <<EOF || die "endian test failed"
3887 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3888 EOF
3889 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3890
3891 check_inline_asm inline_asm_labels '"1:\n"'
3892
3893 if enabled alpha; then
3894
3895     check_cflags -mieee
3896
3897 elif enabled arm; then
3898
3899     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
3900 float func(float a, float b){ return a+b; }
3901 EOF
3902
3903     enabled thumb && check_cflags -mthumb || check_cflags -marm
3904     nogas=die
3905
3906     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
3907         enable vfp_args
3908     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
3909         case "${cross_prefix:-$cc}" in
3910             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
3911             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
3912 __asm__ (".eabi_attribute 28, 1");
3913 int main(void) { return 0; }
3914 EOF
3915         esac
3916         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
3917     fi
3918
3919     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
3920     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
3921     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
3922     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
3923     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
3924     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
3925
3926     [ $target_os = linux ] ||
3927         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
3928             $ARCH_EXT_LIST_ARM
3929
3930     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
3931     check_inline_asm asm_mod_y '"vmul.i32 d0, d0, %y0" :: "x"(0)'
3932
3933     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
3934
3935 elif enabled mips; then
3936
3937     check_inline_asm loongson '"dmult.g $1, $2, $3"'
3938     enabled mips32r2  && add_cflags "-mips32r2" && add_asflags "-mips32r2" &&
3939      check_inline_asm mips32r2  '"rotr $t0, $t1, 1"'
3940     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
3941      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
3942     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
3943      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
3944     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
3945      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
3946
3947 elif enabled parisc; then
3948
3949     if enabled gcc; then
3950         case $($cc -dumpversion) in
3951             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
3952         esac
3953     fi
3954
3955 elif enabled ppc; then
3956
3957     enable local_aligned_8 local_aligned_16
3958
3959     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
3960     check_inline_asm ibm_asm   '"add 0, 0, 0"'
3961     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
3962     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
3963
3964     # AltiVec flags: The FSF version of GCC differs from the Apple version
3965     if enabled altivec; then
3966         if ! enabled_any pic ppc64; then
3967             nogas=warn
3968         fi
3969         check_cflags -maltivec -mabi=altivec &&
3970         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
3971         check_cflags -faltivec
3972
3973         # check if our compiler supports Motorola AltiVec C API
3974         check_cc <<EOF || disable altivec
3975 $inc_altivec_h
3976 int main(void) {
3977     vector signed int v1 = (vector signed int) { 0 };
3978     vector signed int v2 = (vector signed int) { 1 };
3979     v1 = vec_add(v1, v2);
3980     return 0;
3981 }
3982 EOF
3983
3984         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
3985     fi
3986
3987 elif enabled sparc; then
3988
3989     enabled vis && check_inline_asm vis '"pdist %f0, %f0, %f0"'
3990
3991 elif enabled x86; then
3992
3993     check_builtin rdtsc    intrin.h   "__rdtsc()"
3994     check_builtin mm_empty mmintrin.h "_mm_empty()"
3995
3996     enable local_aligned_8 local_aligned_16
3997
3998     # check whether EBP is available on x86
3999     # As 'i' is stored on the stack, this program will crash
4000     # if the base pointer is used to access it because the
4001     # base pointer is cleared in the inline assembly code.
4002     check_exec_crash <<EOF && enable ebp_available
4003 volatile int i=0;
4004 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4005 return i;
4006 EOF
4007
4008     # check whether EBX is available on x86
4009     check_inline_asm ebx_available '""::"b"(0)' &&
4010         check_inline_asm ebx_available '"":::"%ebx"'
4011
4012     # check whether xmm clobbers are supported
4013     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4014
4015     # check whether binutils is new enough to compile SSSE3/MMXEXT
4016     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4017     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4018
4019     if ! disabled_any asm mmx yasm; then
4020         if check_cmd $yasmexe --version; then
4021             enabled x86_64 && yasm_extra="-m amd64"
4022             yasm_debug="-g dwarf2"
4023         elif check_cmd nasm -v; then
4024             yasmexe=nasm
4025             yasm_debug="-g -F dwarf"
4026             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4027         fi
4028
4029         YASMFLAGS="-f $objformat $yasm_extra"
4030         enabled pic               && append YASMFLAGS "-DPIC"
4031         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4032         case "$objformat" in
4033             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4034         esac
4035
4036         check_yasm "movbe ecx, [5]" && enable yasm ||
4037             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4038         check_yasm "vextractf128 xmm0, ymm0, 0"      || disable avx_external avresample
4039         check_yasm "vfmaddps ymm0, ymm1, ymm2,&