Merge commit '0f0d1d056e1a3ad3db32b7d1a06286b2841e91b1'
[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   --enable-rpath           use rpath to allow installing libraries in paths
91                            not part of the dynamic linker search path
92
93 Licensing options:
94   --enable-gpl             allow use of GPL code, the resulting libs
95                            and binaries will be under GPL [no]
96   --enable-version3        upgrade (L)GPL to version 3 [no]
97   --enable-nonfree         allow use of nonfree code, the resulting libs
98                            and binaries will be unredistributable [no]
99
100 Configuration options:
101   --disable-static         do not build static libraries [no]
102   --enable-shared          build shared libraries [no]
103   --enable-small           optimize for size instead of speed
104   --disable-runtime-cpudetect disable detecting cpu capabilities at runtime (smaller binary)
105   --enable-gray            enable full grayscale support (slower color)
106   --disable-swscale-alpha  disable alpha channel support in swscale
107   --disable-all            disable building components, libraries and programs
108   --enable-incompatible-libav-abi enable incompatible Libav fork ABI [no]
109   --enable-incompatible-fork-abi  enable incompatible Libav fork ABI (deprecated) [no]
110   --enable-raise-major     increase major version numbers in sonames [no]
111
112 Program options:
113   --disable-programs       do not build command line programs
114   --disable-ffmpeg         disable ffmpeg build
115   --disable-ffplay         disable ffplay build
116   --disable-ffprobe        disable ffprobe build
117   --disable-ffserver       disable ffserver build
118
119 Documentation options:
120   --disable-doc            do not build documentation
121   --disable-htmlpages      do not build HTML documentation pages
122   --disable-manpages       do not build man documentation pages
123   --disable-podpages       do not build POD documentation pages
124   --disable-txtpages       do not build text documentation pages
125
126 Component options:
127   --disable-avdevice       disable libavdevice build
128   --disable-avcodec        disable libavcodec build
129   --disable-avformat       disable libavformat build
130   --disable-avutil         disable libavutil build
131   --disable-swresample     disable libswresample build
132   --disable-swscale        disable libswscale build
133   --disable-postproc       disable libpostproc build
134   --disable-avfilter       disable libavfilter build
135   --enable-avresample      enable libavresample build [no]
136   --disable-pthreads       disable pthreads [auto]
137   --disable-w32threads     disable Win32 threads [auto]
138   --disable-os2threads     disable OS/2 threads [auto]
139   --disable-network        disable network support [no]
140   --disable-dct            disable DCT code
141   --disable-dwt            disable DWT code
142   --disable-error-resilience disable error resilience code
143   --disable-lsp            disable LSP code
144   --disable-lzo            disable LZO decoder code
145   --disable-mdct           disable MDCT code
146   --disable-rdft           disable RDFT code
147   --disable-fft            disable FFT code
148
149 Hardware accelerators:
150   --disable-dxva2          disable DXVA2 code [autodetect]
151   --disable-vaapi          disable VAAPI code [autodetect]
152   --enable-vda             enable VDA code
153   --disable-vdpau          disable VDPAU code [autodetect]
154
155 Individual component options:
156   --disable-everything     disable all components listed below
157   --disable-encoder=NAME   disable encoder NAME
158   --enable-encoder=NAME    enable encoder NAME
159   --disable-encoders       disable all encoders
160   --disable-decoder=NAME   disable decoder NAME
161   --enable-decoder=NAME    enable decoder NAME
162   --disable-decoders       disable all decoders
163   --disable-hwaccel=NAME   disable hwaccel NAME
164   --enable-hwaccel=NAME    enable hwaccel NAME
165   --disable-hwaccels       disable all hwaccels
166   --disable-muxer=NAME     disable muxer NAME
167   --enable-muxer=NAME      enable muxer NAME
168   --disable-muxers         disable all muxers
169   --disable-demuxer=NAME   disable demuxer NAME
170   --enable-demuxer=NAME    enable demuxer NAME
171   --disable-demuxers       disable all demuxers
172   --enable-parser=NAME     enable parser NAME
173   --disable-parser=NAME    disable parser NAME
174   --disable-parsers        disable all parsers
175   --enable-bsf=NAME        enable bitstream filter NAME
176   --disable-bsf=NAME       disable bitstream filter NAME
177   --disable-bsfs           disable all bitstream filters
178   --enable-protocol=NAME   enable protocol NAME
179   --disable-protocol=NAME  disable protocol NAME
180   --disable-protocols      disable all protocols
181   --enable-indev=NAME      enable input device NAME
182   --disable-indev=NAME     disable input device NAME
183   --disable-indevs         disable input devices
184   --enable-outdev=NAME     enable output device NAME
185   --disable-outdev=NAME    disable output device NAME
186   --disable-outdevs        disable output devices
187   --disable-devices        disable all devices
188   --enable-filter=NAME     enable filter NAME
189   --disable-filter=NAME    disable filter NAME
190   --disable-filters        disable all filters
191
192 External library support:
193   --enable-avisynth        enable reading of AviSynth script files [no]
194   --disable-bzlib          disable bzlib [autodetect]
195   --enable-fontconfig      enable fontconfig
196   --enable-frei0r          enable frei0r video filtering
197   --enable-gnutls          enable gnutls [no]
198   --disable-iconv          disable iconv [autodetect]
199   --enable-ladspa          enable LADSPA audio filtering
200   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
201   --enable-libass          enable libass subtitles rendering [no]
202   --enable-libbluray       enable BluRay reading using libbluray [no]
203   --enable-libcaca         enable textual display using libcaca
204   --enable-libcelt         enable CELT decoding via libcelt [no]
205   --enable-libcdio         enable audio CD grabbing with libcdio
206   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
207                            and libraw1394 [no]
208   --enable-libfaac         enable AAC encoding via libfaac [no]
209   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
210   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
211   --enable-libfreetype     enable libfreetype [no]
212   --enable-libgme          enable Game Music Emu via libgme [no]
213   --enable-libgsm          enable GSM de/encoding via libgsm [no]
214   --enable-libiec61883     enable iec61883 via libiec61883 [no]
215   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
216   --enable-libmodplug      enable ModPlug via libmodplug [no]
217   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
218   --enable-libnut          enable NUT (de)muxing via libnut,
219                            native (de)muxer exists [no]
220   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
221   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
222   --enable-libopencv       enable video filtering via libopencv [no]
223   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
224   --enable-libopus         enable Opus decoding via libopus [no]
225   --enable-libpulse        enable Pulseaudio input via libpulse [no]
226   --enable-libquvi         enable quvi input via libquvi [no]
227   --enable-librtmp         enable RTMP[E] support via librtmp [no]
228   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
229   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
230   --enable-libsoxr         enable Include libsoxr resampling [no]
231   --enable-libspeex        enable Speex de/encoding via libspeex [no]
232   --enable-libssh          enable SFTP protocol via libssh [no]
233   --enable-libstagefright-h264  enable H.264 decoding via libstagefright [no]
234   --enable-libtheora       enable Theora encoding via libtheora [no]
235   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
236   --enable-libutvideo      enable Ut Video encoding and decoding via libutvideo [no]
237   --enable-libv4l2         enable libv4l2/v4l-utils [no]
238   --enable-libvidstab      enable video stabilization using vid.stab [no]
239   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
240   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
241   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
242                            native implementation exists [no]
243   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
244   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
245   --enable-libwebp         enable WebP encoding via libwebp [no]
246   --enable-libx264         enable H.264 encoding via x264 [no]
247   --enable-libx265         enable HEVC encoding via x265 [no]
248   --enable-libxavs         enable AVS encoding via xavs [no]
249   --enable-libxvid         enable Xvid encoding via xvidcore,
250                            native MPEG-4/Xvid encoder exists [no]
251   --enable-libzmq          enable message passing via libzmq [no]
252   --enable-libzvbi         enable teletext support via libzvbi [no]
253   --enable-decklink        enable Blackmagick DeckLink output [no]
254   --enable-openal          enable OpenAL 1.1 capture support [no]
255   --enable-opencl          enable OpenCL code
256   --enable-opengl          enable OpenGL rendering [no]
257   --enable-openssl         enable openssl [no]
258   --enable-x11grab         enable X11 grabbing [no]
259   --disable-xlib           disable xlib [autodetect]
260   --disable-zlib           disable zlib [autodetect]
261
262 Toolchain options:
263   --arch=ARCH              select architecture [$arch]
264   --cpu=CPU                select the minimum required CPU (affects
265                            instruction selection, may crash on older CPUs)
266   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
267   --progs-suffix=SUFFIX    program name suffix []
268   --enable-cross-compile   assume a cross-compiler is used
269   --sysroot=PATH           root of cross-build tree
270   --sysinclude=PATH        location of cross-build system headers
271   --target-os=OS           compiler targets OS [$target_os]
272   --target-exec=CMD        command to run executables on target
273   --target-path=DIR        path to view of build directory on target
274   --target-samples=DIR     path to samples directory on target
275   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
276   --toolchain=NAME         set tool defaults according to NAME
277   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
278   --nm=NM                  use nm tool NM [$nm_default]
279   --ar=AR                  use archive tool AR [$ar_default]
280   --as=AS                  use assembler AS [$as_default]
281   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
282   --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]
283   --cc=CC                  use C compiler CC [$cc_default]
284   --cxx=CXX                use C compiler CXX [$cxx_default]
285   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
286   --ld=LD                  use linker LD [$ld_default]
287   --pkg-config=PKGCONF     use pkg-config PKGCONF [$pkg_config_default]
288   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
289   --host-cc=HOSTCC         use host C compiler HOSTCC
290   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
291   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
292   --host-ld=HOSTLD         use host linker HOSTLD
293   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
294   --host-libs=HLIBS        use libs HLIBS when linking for host
295   --host-os=OS             compiler host OS [$target_os]
296   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
297   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
298   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
299   --extra-libs=ELIBS       add ELIBS [$ELIBS]
300   --extra-version=STRING   version string suffix []
301   --optflags=OPTFLAGS      override optimization-related compiler flags
302   --build-suffix=SUFFIX    library name suffix []
303   --enable-pic             build position-independent code
304   --enable-thumb           compile for Thumb instruction set
305   --enable-lto             use link-time optimization
306
307 Advanced options (experts only):
308   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
309   --disable-symver         disable symbol versioning
310   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
311   --disable-safe-bitstream-reader
312                            disable buffer boundary checking in bitreaders
313                            (faster, but may crash)
314   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
315   --enable-sram            allow use of on-chip SRAM
316
317 Optimization options (experts only):
318   --disable-asm            disable all assembler optimizations
319   --disable-altivec        disable AltiVec optimizations
320   --disable-amd3dnow       disable 3DNow! optimizations
321   --disable-amd3dnowext    disable 3DNow! extended optimizations
322   --disable-mmx            disable MMX optimizations
323   --disable-mmxext         disable MMXEXT optimizations
324   --disable-sse            disable SSE optimizations
325   --disable-sse2           disable SSE2 optimizations
326   --disable-sse3           disable SSE3 optimizations
327   --disable-ssse3          disable SSSE3 optimizations
328   --disable-sse4           disable SSE4 optimizations
329   --disable-sse42          disable SSE4.2 optimizations
330   --disable-avx            disable AVX optimizations
331   --disable-xop            disable XOP optimizations
332   --disable-fma3           disable FMA3 optimizations
333   --disable-fma4           disable FMA4 optimizations
334   --disable-avx2           disable AVX2 optimizations
335   --disable-armv5te        disable armv5te optimizations
336   --disable-armv6          disable armv6 optimizations
337   --disable-armv6t2        disable armv6t2 optimizations
338   --disable-vfp            disable VFP optimizations
339   --disable-neon           disable NEON optimizations
340   --disable-inline-asm     disable use of inline assembler
341   --disable-yasm           disable use of yasm assembler
342   --disable-mips32r2       disable MIPS32R2 optimizations
343   --disable-mipsdspr1      disable MIPS DSP ASE R1 optimizations
344   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
345   --disable-mipsfpu        disable floating point MIPS optimizations
346   --disable-fast-unaligned consider unaligned accesses slow
347
348 Developer options (useful when working on FFmpeg itself):
349   --disable-debug          disable debugging symbols
350   --enable-debug=LEVEL     set the debug level [$debuglevel]
351   --disable-optimizations  disable compiler optimizations
352   --enable-extra-warnings  enable more compiler warnings
353   --disable-stripping      disable stripping of executables and shared libraries
354   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
355                            2 causes a slowdown at runtime.
356   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
357   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
358                            leaks and errors, using the specified valgrind binary.
359                            Cannot be combined with --target-exec
360   --enable-ftrapv          Trap arithmetic overflows
361   --samples=PATH           location of test samples for FATE, if not set use
362                            \$FATE_SAMPLES at make invocation time.
363   --enable-neon-clobber-test check NEON registers for clobbering (should be
364                            used only for debugging purposes)
365   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
366                            should be used only for debugging purposes)
367   --enable-random          randomly enable/disable components
368   --disable-random
369   --enable-random=LIST     randomly enable/disable specific components or
370   --disable-random=LIST    component groups. LIST is a comma-separated list
371                            of NAME[:PROB] entries where NAME is a component
372                            (group) and PROB the probability associated with
373                            NAME (default 0.5).
374   --random-seed=VALUE      seed value for --enable/disable-random
375
376 NOTE: Object files are built at the place where configure is launched.
377 EOF
378   exit 0
379 }
380
381 quotes='""'
382
383 log(){
384     echo "$@" >> $logfile
385 }
386
387 log_file(){
388     log BEGIN $1
389     pr -n -t $1 >> $logfile
390     log END $1
391 }
392
393 echolog(){
394     log "$@"
395     echo "$@"
396 }
397
398 warn(){
399     log "WARNING: $*"
400     WARNINGS="${WARNINGS}WARNING: $*\n"
401 }
402
403 die(){
404     echolog "$@"
405     cat <<EOF
406
407 If you think configure made a mistake, make sure you are using the latest
408 version from Git.  If the latest version fails, report the problem to the
409 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
410 EOF
411     if disabled logging; then
412         cat <<EOF
413 Rerun configure with logging enabled (do not use --disable-logging), and
414 include the log this produces with your report.
415 EOF
416     else
417         cat <<EOF
418 Include the log file "$logfile" produced by configure as this will help
419 solving the problem.
420 EOF
421     fi
422     exit 1
423 }
424
425 # Avoid locale weirdness, besides we really just want to translate ASCII.
426 toupper(){
427     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
428 }
429
430 tolower(){
431     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
432 }
433
434 c_escape(){
435     echo "$*" | sed 's/["\\]/\\\0/g'
436 }
437
438 sh_quote(){
439     v=$(echo "$1" | sed "s/'/'\\\\''/g")
440     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
441     echo "$v"
442 }
443
444 cleanws(){
445     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//;s/\r//g'
446 }
447
448 filter(){
449     pat=$1
450     shift
451     for v; do
452         eval "case $v in $pat) echo $v ;; esac"
453     done
454 }
455
456 filter_out(){
457     pat=$1
458     shift
459     for v; do
460         eval "case $v in $pat) ;; *) echo $v ;; esac"
461     done
462 }
463
464 map(){
465     m=$1
466     shift
467     for v; do eval $m; done
468 }
469
470 add_suffix(){
471     suffix=$1
472     shift
473     for v; do echo ${v}${suffix}; done
474 }
475
476 set_all(){
477     value=$1
478     shift
479     for var in $*; do
480         eval $var=$value
481     done
482 }
483
484 set_weak(){
485     value=$1
486     shift
487     for var; do
488         eval : \${$var:=$value}
489     done
490 }
491
492 sanitize_var_name(){
493     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
494 }
495
496 set_safe(){
497     var=$1
498     shift
499     eval $(sanitize_var_name "$var")='$*'
500 }
501
502 get_safe(){
503     eval echo \$$(sanitize_var_name "$1")
504 }
505
506 pushvar(){
507     for pvar in $*; do
508         eval level=\${${pvar}_level:=0}
509         eval ${pvar}_${level}="\$$pvar"
510         eval ${pvar}_level=$(($level+1))
511     done
512 }
513
514 popvar(){
515     for pvar in $*; do
516         eval level=\${${pvar}_level:-0}
517         test $level = 0 && continue
518         eval level=$(($level-1))
519         eval $pvar="\${${pvar}_${level}}"
520         eval ${pvar}_level=$level
521         eval unset ${pvar}_${level}
522     done
523 }
524
525 enable(){
526     set_all yes $*
527 }
528
529 disable(){
530     set_all no $*
531 }
532
533 enable_weak(){
534     set_weak yes $*
535 }
536
537 disable_weak(){
538     set_weak no $*
539 }
540
541 enable_safe(){
542     for var; do
543         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
544     done
545 }
546
547 disable_safe(){
548     for var; do
549         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
550     done
551 }
552
553 do_enable_deep(){
554     for var; do
555         enabled $var && continue
556         eval sel="\$${var}_select"
557         eval sgs="\$${var}_suggest"
558         pushvar var sgs
559         enable_deep $sel
560         popvar sgs
561         enable_deep_weak $sgs
562         popvar var
563     done
564 }
565
566 enable_deep(){
567     do_enable_deep $*
568     enable $*
569 }
570
571 enable_deep_weak(){
572     for var; do
573         disabled $var && continue
574         pushvar var
575         do_enable_deep $var
576         popvar var
577         enable_weak $var
578     done
579 }
580
581 enabled(){
582     test "${1#!}" = "$1" && op== || op=!=
583     eval test "x\$${1#!}" $op "xyes"
584 }
585
586 disabled(){
587     test "${1#!}" = "$1" && op== || op=!=
588     eval test "x\$${1#!}" $op "xno"
589 }
590
591 enabled_all(){
592     for opt; do
593         enabled $opt || return 1
594     done
595 }
596
597 disabled_all(){
598     for opt; do
599         disabled $opt || return 1
600     done
601 }
602
603 enabled_any(){
604     for opt; do
605         enabled $opt && return 0
606     done
607 }
608
609 disabled_any(){
610     for opt; do
611         disabled $opt && return 0
612     done
613     return 1
614 }
615
616 set_default(){
617     for opt; do
618         eval : \${$opt:=\$${opt}_default}
619     done
620 }
621
622 is_in(){
623     value=$1
624     shift
625     for var in $*; do
626         [ $var = $value ] && return 0
627     done
628     return 1
629 }
630
631 do_check_deps(){
632     for cfg; do
633         cfg="${cfg#!}"
634         enabled ${cfg}_checking && die "Circular dependency for $cfg."
635         disabled ${cfg}_checking && continue
636         enable ${cfg}_checking
637         append allopts $cfg
638
639         eval dep_all="\$${cfg}_deps"
640         eval dep_any="\$${cfg}_deps_any"
641         eval dep_sel="\$${cfg}_select"
642         eval dep_sgs="\$${cfg}_suggest"
643         eval dep_ifa="\$${cfg}_if"
644         eval dep_ifn="\$${cfg}_if_any"
645
646         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
647         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
648         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
649
650         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
651         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
652         enabled_all  $dep_all || disable $cfg
653         enabled_any  $dep_any || disable $cfg
654         disabled_any $dep_sel && disable $cfg
655
656         if enabled $cfg; then
657             enable_deep $dep_sel
658             enable_deep_weak $dep_sgs
659         fi
660
661         disable ${cfg}_checking
662     done
663 }
664
665 check_deps(){
666     unset allopts
667
668     do_check_deps "$@"
669
670     for cfg in $allopts; do
671         enabled $cfg || continue
672         eval dep_extralibs="\$${cfg}_extralibs"
673         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
674     done
675 }
676
677 print_config(){
678     pfx=$1
679     files=$2
680     shift 2
681     map 'eval echo "$v \${$v:-no}"' "$@" |
682     awk "BEGIN { split(\"$files\", files) }
683         {
684             c = \"$pfx\" toupper(\$1);
685             v = \$2;
686             sub(/yes/, 1, v);
687             sub(/no/,  0, v);
688             for (f in files) {
689                 file = files[f];
690                 if (file ~ /\\.h\$/) {
691                     printf(\"#define %s %d\\n\", c, v) >>file;
692                 } else if (file ~ /\\.asm\$/) {
693                     printf(\"%%define %s %d\\n\", c, v) >>file;
694                 } else if (file ~ /\\.mak\$/) {
695                     n = -v ? \"\" : \"!\";
696                     printf(\"%s%s=yes\\n\", n, c) >>file;
697                 } else if (file ~ /\\.texi\$/) {
698                     pre = -v ? \"\" : \"@c \";
699                     yesno = \$2;
700                     c2 = tolower(c);
701                     gsub(/_/, \"-\", c2);
702                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
703                 }
704             }
705         }"
706 }
707
708 print_enabled(){
709     suf=$1
710     shift
711     for v; do
712         enabled $v && printf "%s\n" ${v%$suf};
713     done
714 }
715
716 append(){
717     var=$1
718     shift
719     eval "$var=\"\$$var $*\""
720 }
721
722 prepend(){
723     var=$1
724     shift
725     eval "$var=\"$* \$$var\""
726 }
727
728 add_cppflags(){
729     append CPPFLAGS "$@"
730 }
731
732 add_cflags(){
733     append CFLAGS $($cflags_filter "$@")
734 }
735
736 add_cxxflags(){
737     append CXXFLAGS $($cflags_filter "$@")
738 }
739
740 add_asflags(){
741     append ASFLAGS $($asflags_filter "$@")
742 }
743
744 add_ldflags(){
745     append LDFLAGS $($ldflags_filter "$@")
746 }
747
748 add_stripflags(){
749     append ASMSTRIPFLAGS "$@"
750 }
751
752 add_extralibs(){
753     prepend extralibs $($ldflags_filter "$@")
754 }
755
756 add_host_cppflags(){
757     append host_cppflags "$@"
758 }
759
760 add_host_cflags(){
761     append host_cflags $($host_cflags_filter "$@")
762 }
763
764 add_host_ldflags(){
765     append host_ldflags $($host_ldflags_filter "$@")
766 }
767
768 add_compat(){
769     append compat_objs $1
770     shift
771     map 'add_cppflags -D$v' "$@"
772 }
773
774 check_cmd(){
775     log "$@"
776     "$@" >> $logfile 2>&1
777 }
778
779 cc_o(){
780     eval printf '%s\\n' $CC_O
781 }
782
783 cc_e(){
784     eval printf '%s\\n' $CC_E
785 }
786
787 check_cc(){
788     log check_cc "$@"
789     cat > $TMPC
790     log_file $TMPC
791     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
792 }
793
794 check_cxx(){
795     log check_cxx "$@"
796     cat > $TMPCPP
797     log_file $TMPCPP
798     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
799 }
800
801 check_cpp(){
802     log check_cpp "$@"
803     cat > $TMPC
804     log_file $TMPC
805     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
806 }
807
808 as_o(){
809     eval printf '%s\\n' $AS_O
810 }
811
812 check_as(){
813     log check_as "$@"
814     cat > $TMPS
815     log_file $TMPS
816     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
817 }
818
819 check_inline_asm(){
820     log check_inline_asm "$@"
821     name="$1"
822     code="$2"
823     shift 2
824     disable $name
825     check_cc "$@" <<EOF && enable $name
826 void foo(void){ __asm__ volatile($code); }
827 EOF
828 }
829
830 check_insn(){
831     log check_insn "$@"
832     check_inline_asm ${1}_inline "\"$2\""
833     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
834 }
835
836 check_yasm(){
837     log check_yasm "$@"
838     echo "$1" > $TMPS
839     log_file $TMPS
840     shift 1
841     check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS
842 }
843
844 ld_o(){
845     eval printf '%s\\n' $LD_O
846 }
847
848 check_ld(){
849     log check_ld "$@"
850     type=$1
851     shift 1
852     flags=$(filter_out '-l*|*.so' $@)
853     libs=$(filter '-l*|*.so' $@)
854     check_$type $($cflags_filter $flags) || return
855     flags=$($ldflags_filter $flags)
856     libs=$($ldflags_filter $libs)
857     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
858 }
859
860 print_include(){
861     hdr=$1
862     test "${hdr%.h}" = "${hdr}" &&
863         echo "#include $hdr"    ||
864         echo "#include <$hdr>"
865 }
866
867 check_code(){
868     log check_code "$@"
869     check=$1
870     headers=$2
871     code=$3
872     shift 3
873     {
874         for hdr in $headers; do
875             print_include $hdr
876         done
877         echo "int main(void) { $code; return 0; }"
878     } | check_$check "$@"
879 }
880
881 check_cppflags(){
882     log check_cppflags "$@"
883     check_cc "$@" <<EOF && append CPPFLAGS "$@"
884 int x;
885 EOF
886 }
887
888 test_cflags(){
889     log test_cflags "$@"
890     set -- $($cflags_filter "$@")
891     check_cc "$@" <<EOF
892 int x;
893 EOF
894 }
895
896 check_cflags(){
897     log check_cflags "$@"
898     test_cflags "$@" && add_cflags "$@"
899 }
900
901 check_cxxflags(){
902     log check_cxxflags "$@"
903     set -- $($cflags_filter "$@")
904     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
905 int x;
906 EOF
907 }
908
909 test_ldflags(){
910     log test_ldflags "$@"
911     check_ld "cc" "$@" <<EOF
912 int main(void){ return 0; }
913 EOF
914 }
915
916 check_ldflags(){
917     log check_ldflags "$@"
918     test_ldflags "$@" && add_ldflags "$@"
919 }
920
921 test_stripflags(){
922     log test_stripflags "$@"
923     # call check_cc to get a fresh TMPO
924     check_cc <<EOF
925 int main(void) { return 0; }
926 EOF
927     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
928 }
929
930 check_stripflags(){
931     log check_stripflags "$@"
932     test_stripflags "$@" && add_stripflags "$@"
933 }
934
935 check_header(){
936     log check_header "$@"
937     header=$1
938     shift
939     disable_safe $header
940     check_cpp "$@" <<EOF && enable_safe $header
941 #include <$header>
942 int x;
943 EOF
944 }
945
946 check_func(){
947     log check_func "$@"
948     func=$1
949     shift
950     disable $func
951     check_ld "cc" "$@" <<EOF && enable $func
952 extern int $func();
953 int main(void){ $func(); }
954 EOF
955 }
956
957 check_mathfunc(){
958     log check_mathfunc "$@"
959     func=$1
960     narg=$2
961     shift 2
962     test $narg = 2 && args="f, g" || args="f"
963     disable $func
964     check_ld "cc" "$@" <<EOF && enable $func
965 #include <math.h>
966 float foo(float f, float g) { return $func($args); }
967 int main(void){ return (int) foo; }
968 EOF
969 }
970
971 check_func_headers(){
972     log check_func_headers "$@"
973     headers=$1
974     funcs=$2
975     shift 2
976     {
977         for hdr in $headers; do
978             print_include $hdr
979         done
980         for func in $funcs; do
981             echo "long check_$func(void) { return (long) $func; }"
982         done
983         echo "int main(void) { return 0; }"
984     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
985 }
986
987 check_class_headers_cpp(){
988     log check_class_headers_cpp "$@"
989     headers=$1
990     classes=$2
991     shift 2
992     {
993         for hdr in $headers; do
994             echo "#include <$hdr>"
995         done
996         echo "int main(void) { "
997         i=1
998         for class in $classes; do
999             echo "$class obj$i;"
1000             i=$(expr $i + 1)
1001         done
1002         echo "return 0; }"
1003     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
1004 }
1005
1006 check_cpp_condition(){
1007     log check_cpp_condition "$@"
1008     header=$1
1009     condition=$2
1010     shift 2
1011     check_cpp "$@" <<EOF
1012 #include <$header>
1013 #if !($condition)
1014 #error "unsatisfied condition: $condition"
1015 #endif
1016 EOF
1017 }
1018
1019 check_lib(){
1020     log check_lib "$@"
1021     header="$1"
1022     func="$2"
1023     shift 2
1024     check_header $header && check_func $func "$@" && add_extralibs "$@"
1025 }
1026
1027 check_lib2(){
1028     log check_lib2 "$@"
1029     headers="$1"
1030     funcs="$2"
1031     shift 2
1032     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1033 }
1034
1035 check_lib_cpp(){
1036     log check_lib_cpp "$@"
1037     headers="$1"
1038     classes="$2"
1039     shift 2
1040     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1041 }
1042
1043 check_pkg_config(){
1044     log check_pkg_config "$@"
1045     pkgandversion="$1"
1046     pkg="${1%% *}"
1047     headers="$2"
1048     funcs="$3"
1049     shift 3
1050     check_cmd $pkg_config --exists --print-errors $pkgandversion || return
1051     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1052     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1053     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1054         set_safe ${pkg}_cflags $pkg_cflags   &&
1055         set_safe ${pkg}_libs   $pkg_libs
1056 }
1057
1058 check_exec(){
1059     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1060 }
1061
1062 check_exec_crash(){
1063     code=$(cat)
1064
1065     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1066     # are safe but may not be available everywhere.  Thus we use
1067     # raise(SIGTERM) instead.  The check is run in a subshell so we
1068     # can redirect the "Terminated" message from the shell.  SIGBUS
1069     # is not defined by standard C so it is used conditionally.
1070
1071     (check_exec "$@") >> $logfile 2>&1 <<EOF
1072 #include <signal.h>
1073 static void sighandler(int sig){
1074     raise(SIGTERM);
1075 }
1076 int foo(void){
1077     $code
1078 }
1079 int (*func_ptr)(void) = foo;
1080 int main(void){
1081     signal(SIGILL, sighandler);
1082     signal(SIGFPE, sighandler);
1083     signal(SIGSEGV, sighandler);
1084 #ifdef SIGBUS
1085     signal(SIGBUS, sighandler);
1086 #endif
1087     return func_ptr();
1088 }
1089 EOF
1090 }
1091
1092 check_type(){
1093     log check_type "$@"
1094     headers=$1
1095     type=$2
1096     shift 2
1097     disable_safe "$type"
1098     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1099 }
1100
1101 check_struct(){
1102     log check_struct "$@"
1103     headers=$1
1104     struct=$2
1105     member=$3
1106     shift 3
1107     disable_safe "${struct}_${member}"
1108     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1109         enable_safe "${struct}_${member}"
1110 }
1111
1112 check_builtin(){
1113     log check_builtin "$@"
1114     name=$1
1115     headers=$2
1116     builtin=$3
1117     shift 3
1118     disable "$name"
1119     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1120 }
1121
1122 check_compile_assert(){
1123     log check_compile_assert "$@"
1124     name=$1
1125     headers=$2
1126     condition=$3
1127     shift 3
1128     disable "$name"
1129     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1130 }
1131
1132 require(){
1133     name="$1"
1134     header="$2"
1135     func="$3"
1136     shift 3
1137     check_lib $header $func "$@" || die "ERROR: $name not found"
1138 }
1139
1140 require2(){
1141     name="$1"
1142     headers="$2"
1143     func="$3"
1144     shift 3
1145     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1146 }
1147
1148 require_cpp(){
1149     name="$1"
1150     headers="$2"
1151     classes="$3"
1152     shift 3
1153     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1154 }
1155
1156 require_pkg_config(){
1157     pkg="$1"
1158     check_pkg_config "$@" || die "ERROR: $pkg not found"
1159     add_cflags    $(get_safe ${pkg}_cflags)
1160     add_extralibs $(get_safe ${pkg}_libs)
1161 }
1162
1163 require_libfreetype(){
1164     log require_libfreetype "$@"
1165     pkg="freetype2"
1166     check_cmd $pkg_config --exists --print-errors $pkg \
1167       || die "ERROR: $pkg not found"
1168     pkg_cflags=$($pkg_config --cflags $pkg)
1169     pkg_libs=$($pkg_config --libs $pkg)
1170     {
1171         echo "#include <ft2build.h>"
1172         echo "#include FT_FREETYPE_H"
1173         echo "long check_func(void) { return (long) FT_Init_FreeType; }"
1174         echo "int main(void) { return 0; }"
1175     } | check_ld "cc" $pkg_cflags $pkg_libs \
1176       && set_safe ${pkg}_cflags $pkg_cflags \
1177       && set_safe ${pkg}_libs   $pkg_libs \
1178       || die "ERROR: $pkg not found"
1179     add_cflags    $(get_safe ${pkg}_cflags)
1180     add_extralibs $(get_safe ${pkg}_libs)
1181 }
1182
1183 hostcc_e(){
1184     eval printf '%s\\n' $HOSTCC_E
1185 }
1186
1187 hostcc_o(){
1188     eval printf '%s\\n' $HOSTCC_O
1189 }
1190
1191 check_host_cc(){
1192     log check_host_cc "$@"
1193     cat > $TMPC
1194     log_file $TMPC
1195     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1196 }
1197
1198 check_host_cpp(){
1199     log check_host_cpp "$@"
1200     cat > $TMPC
1201     log_file $TMPC
1202     check_cmd $host_cc $HOSTCPPFLAGS $HOSTCFLAGS "$@" $(hostcc_e $TMPO) $TMPC
1203 }
1204
1205 check_host_cppflags(){
1206     log check_host_cppflags "$@"
1207     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1208 int x;
1209 EOF
1210 }
1211
1212 check_host_cflags(){
1213     log check_host_cflags "$@"
1214     set -- $($host_cflags_filter "$@")
1215     check_host_cc "$@" <<EOF && append host_cflags "$@"
1216 int x;
1217 EOF
1218 }
1219
1220 check_host_cpp_condition(){
1221     log check_host_cpp_condition "$@"
1222     header=$1
1223     condition=$2
1224     shift 2
1225     check_host_cpp "$@" <<EOF
1226 #include <$header>
1227 #if !($condition)
1228 #error "unsatisfied condition: $condition"
1229 #endif
1230 EOF
1231 }
1232
1233 apply(){
1234     file=$1
1235     shift
1236     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1237 }
1238
1239 cp_if_changed(){
1240     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1241     mkdir -p "$(dirname $2)"
1242     $cp_f "$1" "$2"
1243 }
1244
1245 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1246 # system-dependent things.
1247
1248 COMPONENT_LIST="
1249     bsfs
1250     decoders
1251     demuxers
1252     encoders
1253     filters
1254     hwaccels
1255     indevs
1256     muxers
1257     outdevs
1258     parsers
1259     protocols
1260 "
1261
1262 EXAMPLE_LIST="
1263     avio_reading_example
1264     avcodec_example
1265     demuxing_decoding_example
1266     filter_audio_example
1267     filtering_audio_example
1268     filtering_video_example
1269     metadata_example
1270     muxing_example
1271     remuxing_example
1272     resampling_audio_example
1273     scaling_video_example
1274     transcode_aac_example
1275     transcoding_example
1276 "
1277
1278 EXTERNAL_LIBRARY_LIST="
1279     avisynth
1280     bzlib
1281     crystalhd
1282     decklink
1283     fontconfig
1284     frei0r
1285     gnutls
1286     iconv
1287     ladspa
1288     libaacplus
1289     libass
1290     libbluray
1291     libcaca
1292     libcdio
1293     libcelt
1294     libdc1394
1295     libfaac
1296     libfdk_aac
1297     libflite
1298     libfreetype
1299     libgme
1300     libgsm
1301     libiec61883
1302     libilbc
1303     libmodplug
1304     libmp3lame
1305     libnut
1306     libopencore_amrnb
1307     libopencore_amrwb
1308     libopencv
1309     libopenjpeg
1310     libopus
1311     libpulse
1312     libquvi
1313     librtmp
1314     libschroedinger
1315     libshine
1316     libsoxr
1317     libspeex
1318     libssh
1319     libstagefright_h264
1320     libtheora
1321     libtwolame
1322     libutvideo
1323     libv4l2
1324     libvidstab
1325     libvo_aacenc
1326     libvo_amrwbenc
1327     libvorbis
1328     libvpx
1329     libwavpack
1330     libwebp
1331     libx264
1332     libx265
1333     libxavs
1334     libxvid
1335     libzmq
1336     libzvbi
1337     openal
1338     opencl
1339     opengl
1340     openssl
1341     x11grab
1342     xlib
1343     zlib
1344 "
1345
1346 DOCUMENT_LIST="
1347     doc
1348     htmlpages
1349     manpages
1350     podpages
1351     txtpages
1352 "
1353
1354 FEATURE_LIST="
1355     ftrapv
1356     gray
1357     hardcoded_tables
1358     runtime_cpudetect
1359     safe_bitstream_reader
1360     shared
1361     small
1362     sram
1363     static
1364     swscale_alpha
1365 "
1366
1367 HWACCEL_LIST="
1368     dxva2
1369     vaapi
1370     vda
1371     vdpau
1372     xvmc
1373 "
1374
1375 LIBRARY_LIST="
1376     avcodec
1377     avdevice
1378     avfilter
1379     avformat
1380     avresample
1381     avutil
1382     postproc
1383     swresample
1384     swscale
1385 "
1386
1387 LICENSE_LIST="
1388     gpl
1389     nonfree
1390     version3
1391 "
1392
1393 PROGRAM_LIST="
1394     ffplay
1395     ffprobe
1396     ffserver
1397     ffmpeg
1398 "
1399
1400 SUBSYSTEM_LIST="
1401     dct
1402     dwt
1403     error_resilience
1404     fast_unaligned
1405     fft
1406     lsp
1407     lzo
1408     mdct
1409     network
1410     rdft
1411 "
1412
1413 CONFIG_LIST="
1414     $COMPONENT_LIST
1415     $DOCUMENT_LIST
1416     $EXAMPLE_LIST
1417     $EXTERNAL_LIBRARY_LIST
1418     $FEATURE_LIST
1419     $HWACCEL_LIST
1420     $LICENSE_LIST
1421     $LIBRARY_LIST
1422     $PROGRAM_LIST
1423     $SUBSYSTEM_LIST
1424     incompatible_libav_abi
1425     incompatible_fork_abi
1426     memalign_hack
1427     memory_poisoning
1428     neon_clobber_test
1429     pic
1430     pod2man
1431     raise_major
1432     thumb
1433     xmm_clobber_test
1434 "
1435
1436 THREADS_LIST="
1437     pthreads
1438     os2threads
1439     w32threads
1440 "
1441
1442 ATOMICS_LIST="
1443     atomics_gcc
1444     atomics_suncc
1445     atomics_win32
1446 "
1447
1448 ARCH_LIST="
1449     aarch64
1450     alpha
1451     arm
1452     avr32
1453     avr32_ap
1454     avr32_uc
1455     bfin
1456     ia64
1457     m68k
1458     mips
1459     mips64
1460     parisc
1461     ppc
1462     ppc64
1463     s390
1464     sh4
1465     sparc
1466     sparc64
1467     tilegx
1468     tilepro
1469     tomi
1470     x86
1471     x86_32
1472     x86_64
1473 "
1474
1475 ARCH_EXT_LIST_ARM="
1476     armv5te
1477     armv6
1478     armv6t2
1479     neon
1480     vfp
1481     vfpv3
1482 "
1483
1484 ARCH_EXT_LIST_MIPS="
1485     mipsfpu
1486     mips32r2
1487     mipsdspr1
1488     mipsdspr2
1489 "
1490
1491 ARCH_EXT_LIST_X86_SIMD="
1492     amd3dnow
1493     amd3dnowext
1494     avx
1495     avx2
1496     fma3
1497     fma4
1498     mmx
1499     mmxext
1500     sse
1501     sse2
1502     sse3
1503     sse4
1504     sse42
1505     ssse3
1506     xop
1507 "
1508
1509 ARCH_EXT_LIST_PPC="
1510     altivec
1511     dcbzl
1512     ldbrx
1513     ppc4xx
1514 "
1515
1516 ARCH_EXT_LIST_X86="
1517     $ARCH_EXT_LIST_X86_SIMD
1518     cpunop
1519     i686
1520 "
1521
1522 ARCH_EXT_LIST="
1523     $ARCH_EXT_LIST_ARM
1524     $ARCH_EXT_LIST_PPC
1525     $ARCH_EXT_LIST_X86
1526     $ARCH_EXT_LIST_MIPS
1527     loongson
1528 "
1529
1530 ARCH_FEATURES="
1531     aligned_stack
1532     fast_64bit
1533     fast_clz
1534     fast_cmov
1535     local_aligned_8
1536     local_aligned_16
1537 "
1538
1539 BUILTIN_LIST="
1540     atomic_cas_ptr
1541     machine_rw_barrier
1542     MemoryBarrier
1543     mm_empty
1544     rdtsc
1545     sarestart
1546     sync_val_compare_and_swap
1547 "
1548 HAVE_LIST_CMDLINE="
1549     inline_asm
1550     symver
1551     yasm
1552 "
1553
1554 HAVE_LIST_PUB="
1555     bigendian
1556     fast_unaligned
1557     incompatible_libav_abi
1558     incompatible_fork_abi
1559 "
1560
1561 HEADERS_LIST="
1562     alsa_asoundlib_h
1563     altivec_h
1564     arpa_inet_h
1565     asm_types_h
1566     cdio_paranoia_h
1567     cdio_paranoia_paranoia_h
1568     CL_cl_h
1569     dev_bktr_ioctl_bt848_h
1570     dev_bktr_ioctl_meteor_h
1571     dev_ic_bt8xx_h
1572     dev_video_bktr_ioctl_bt848_h
1573     dev_video_meteor_ioctl_meteor_h
1574     direct_h
1575     dlfcn_h
1576     dxva_h
1577     ES2_gl_h
1578     gsm_h
1579     io_h
1580     mach_mach_time_h
1581     machine_ioctl_bt848_h
1582     machine_ioctl_meteor_h
1583     malloc_h
1584     openjpeg_1_5_openjpeg_h
1585     OpenGL_gl3_h
1586     poll_h
1587     sndio_h
1588     soundcard_h
1589     sys_mman_h
1590     sys_param_h
1591     sys_resource_h
1592     sys_select_h
1593     sys_soundcard_h
1594     sys_time_h
1595     sys_un_h
1596     sys_videoio_h
1597     termios_h
1598     unistd_h
1599     windows_h
1600     winsock2_h
1601 "
1602
1603 MATH_FUNCS="
1604     atanf
1605     atan2f
1606     cbrt
1607     cbrtf
1608     cosf
1609     exp2
1610     exp2f
1611     expf
1612     isinf
1613     isnan
1614     ldexpf
1615     llrint
1616     llrintf
1617     log2
1618     log2f
1619     log10f
1620     lrint
1621     lrintf
1622     powf
1623     rint
1624     round
1625     roundf
1626     sinf
1627     trunc
1628     truncf
1629 "
1630
1631 SYSTEM_FUNCS="
1632     access
1633     aligned_malloc
1634     clock_gettime
1635     closesocket
1636     CommandLineToArgvW
1637     CryptGenRandom
1638     dlopen
1639     fcntl
1640     flt_lim
1641     fork
1642     getaddrinfo
1643     gethrtime
1644     getopt
1645     GetProcessAffinityMask
1646     GetProcessMemoryInfo
1647     GetProcessTimes
1648     getrusage
1649     getservbyport
1650     GetSystemTimeAsFileTime
1651     gettimeofday
1652     glob
1653     glXGetProcAddress
1654     inet_aton
1655     isatty
1656     jack_port_get_latency_range
1657     kbhit
1658     localtime_r
1659     lzo1x_999_compress
1660     mach_absolute_time
1661     MapViewOfFile
1662     memalign
1663     mkstemp
1664     mmap
1665     mprotect
1666     nanosleep
1667     PeekNamedPipe
1668     posix_memalign
1669     pthread_cancel
1670     sched_getaffinity
1671     SetConsoleTextAttribute
1672     setmode
1673     setrlimit
1674     Sleep
1675     strerror_r
1676     sysconf
1677     sysctl
1678     usleep
1679     VirtualAlloc
1680     wglGetProcAddress
1681 "
1682
1683 TOOLCHAIN_FEATURES="
1684     asm_mod_q
1685     attribute_may_alias
1686     attribute_packed
1687     ebp_available
1688     ebx_available
1689     gnu_as
1690     gnu_windres
1691     ibm_asm
1692     inline_asm_labels
1693     inline_asm_nonlocal_labels
1694     inline_asm_direct_symbol_refs
1695     pragma_deprecated
1696     rsync_contimeout
1697     symver_asm_label
1698     symver_gnu_asm
1699     vfp_args
1700     xform_asm
1701     xmm_clobbers
1702 "
1703
1704 TYPES_LIST="
1705     socklen_t
1706     struct_addrinfo
1707     struct_group_source_req
1708     struct_ip_mreq_source
1709     struct_ipv6_mreq
1710     struct_pollfd
1711     struct_rusage_ru_maxrss
1712     struct_sctp_event_subscribe
1713     struct_sockaddr_in6
1714     struct_sockaddr_sa_len
1715     struct_sockaddr_storage
1716     struct_stat_st_mtim_tv_nsec
1717     struct_v4l2_frmivalenum_discrete
1718 "
1719
1720 HAVE_LIST="
1721     $ARCH_EXT_LIST
1722     $(add_suffix _external $ARCH_EXT_LIST)
1723     $(add_suffix _inline   $ARCH_EXT_LIST)
1724     $ARCH_FEATURES
1725     $ATOMICS_LIST
1726     $BUILTIN_LIST
1727     $HAVE_LIST_CMDLINE
1728     $HAVE_LIST_PUB
1729     $HEADERS_LIST
1730     $MATH_FUNCS
1731     $SYSTEM_FUNCS
1732     $THREADS_LIST
1733     $TOOLCHAIN_FEATURES
1734     $TYPES_LIST
1735     atomics_native
1736     dos_paths
1737     libc_msvcrt
1738     libdc1394_1
1739     libdc1394_2
1740     makeinfo
1741     perl
1742     pod2man
1743     sdl
1744     texi2html
1745     threads
1746     vdpau_x11
1747     xlib
1748 "
1749
1750 # options emitted with CONFIG_ prefix but not available on the command line
1751 CONFIG_EXTRA="
1752     aandcttables
1753     ac3dsp
1754     audio_frame_queue
1755     dsputil
1756     exif
1757     frame_thread_encoder
1758     gcrypt
1759     golomb
1760     gplv3
1761     h263dsp
1762     h264chroma
1763     h264dsp
1764     h264pred
1765     h264qpel
1766     hpeldsp
1767     huffman
1768     intrax8
1769     lgplv3
1770     llviddsp
1771     lpc
1772     mpegaudio
1773     mpegaudiodsp
1774     mpegvideo
1775     mpegvideoenc
1776     nettle
1777     rangecoder
1778     riffdec
1779     riffenc
1780     rtpdec
1781     rtpenc_chain
1782     sinewin
1783     tpeldsp
1784     videodsp
1785     vp3dsp
1786 "
1787
1788 CMDLINE_SELECT="
1789     $ARCH_EXT_LIST
1790     $CONFIG_LIST
1791     $HAVE_LIST_CMDLINE
1792     $THREADS_LIST
1793     asm
1794     cross_compile
1795     debug
1796     extra_warnings
1797     logging
1798     lto
1799     optimizations
1800     rpath
1801     stripping
1802 "
1803
1804 PATHS_LIST="
1805     bindir
1806     datadir
1807     docdir
1808     incdir
1809     libdir
1810     mandir
1811     prefix
1812     shlibdir
1813 "
1814
1815 CMDLINE_SET="
1816     $PATHS_LIST
1817     ar
1818     arch
1819     as
1820     assert_level
1821     build_suffix
1822     cc
1823     cpu
1824     cross_prefix
1825     cxx
1826     dep_cc
1827     extra_version
1828     host_cc
1829     host_cflags
1830     host_ld
1831     host_ldflags
1832     host_libs
1833     host_os
1834     install
1835     ld
1836     logfile
1837     malloc_prefix
1838     nm
1839     optflags
1840     pkg_config
1841     pkg_config_flags
1842     progs_suffix
1843     random_seed
1844     samples
1845     strip
1846     sysinclude
1847     sysroot
1848     target_exec
1849     target_os
1850     target_path
1851     target_samples
1852     tempprefix
1853     toolchain
1854     valgrind
1855     yasmexe
1856 "
1857
1858 CMDLINE_APPEND="
1859     extra_cflags
1860     extra_cxxflags
1861     host_cppflags
1862 "
1863
1864 # code dependency declarations
1865
1866 # architecture extensions
1867
1868 armv5te_deps="arm"
1869 armv6_deps="arm"
1870 armv6t2_deps="arm"
1871 neon_deps_any="aarch64 arm"
1872 vfp_deps_any="aarch64 arm"
1873 vfpv3_deps="vfp"
1874
1875 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1876
1877 mipsfpu_deps="mips"
1878 mips32r2_deps="mips"
1879 mipsdspr1_deps="mips"
1880 mipsdspr2_deps="mips"
1881
1882 altivec_deps="ppc"
1883 ppc4xx_deps="ppc"
1884
1885 cpunop_deps="i686"
1886 x86_64_select="i686"
1887 x86_64_suggest="fast_cmov"
1888
1889 amd3dnow_deps="mmx"
1890 amd3dnowext_deps="amd3dnow"
1891 i686_deps="x86"
1892 mmx_deps="x86"
1893 mmxext_deps="mmx"
1894 sse_deps="mmxext"
1895 sse2_deps="sse"
1896 sse3_deps="sse2"
1897 ssse3_deps="sse3"
1898 sse4_deps="ssse3"
1899 sse42_deps="sse4"
1900 avx_deps="sse42"
1901 xop_deps="avx"
1902 fma3_deps="avx"
1903 fma4_deps="avx"
1904 avx2_deps="avx"
1905
1906 mmx_external_deps="yasm"
1907 mmx_inline_deps="inline_asm"
1908 mmx_suggest="mmx_external mmx_inline"
1909
1910 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1911     eval dep=\$${ext}_deps
1912     eval ${ext}_external_deps='"${dep}_external"'
1913     eval ${ext}_inline_deps='"${dep}_inline"'
1914     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1915 done
1916
1917 aligned_stack_if_any="aarch64 ppc x86"
1918 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1919 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1920 fast_unaligned_if_any="aarch64 ppc x86"
1921
1922 need_memalign="altivec neon sse"
1923
1924 # system capabilities
1925 log2_deps="!libc_msvcrt"
1926
1927 symver_if_any="symver_asm_label symver_gnu_asm"
1928
1929 # threading support
1930 atomics_gcc_if="sync_val_compare_and_swap"
1931 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1932 atomics_win32_if="MemoryBarrier"
1933 atomics_native_if_any="$ATOMICS_LIST"
1934 w32threads_deps="atomics_native"
1935 threads_if_any="$THREADS_LIST"
1936
1937 # subsystems
1938 dct_select="rdft"
1939 error_resilience_select="dsputil"
1940 frame_thread_encoder_deps="encoders threads"
1941 mdct_select="fft"
1942 rdft_select="fft"
1943 mpegaudio_select="mpegaudiodsp"
1944 mpegaudiodsp_select="dct"
1945 mpegvideo_select="dsputil h264chroma hpeldsp videodsp"
1946 mpegvideoenc_select="dsputil mpegvideo"
1947
1948 # decoders / encoders
1949 aac_decoder_select="mdct sinewin"
1950 aac_encoder_select="audio_frame_queue mdct sinewin"
1951 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1952 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1953 ac3_encoder_select="mdct ac3dsp dsputil"
1954 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1955 aic_decoder_select="dsputil golomb"
1956 alac_encoder_select="lpc"
1957 als_decoder_select="dsputil"
1958 amrnb_decoder_select="lsp"
1959 amrwb_decoder_select="lsp"
1960 amv_decoder_select="sp5x_decoder exif"
1961 amv_encoder_select="aandcttables"
1962 ape_decoder_select="dsputil"
1963 asv1_decoder_select="dsputil"
1964 asv1_encoder_select="dsputil"
1965 asv2_decoder_select="dsputil"
1966 asv2_encoder_select="dsputil"
1967 atrac1_decoder_select="mdct sinewin"
1968 atrac3_decoder_select="mdct"
1969 atrac3p_decoder_select="mdct sinewin"
1970 avrn_decoder_select="exif"
1971 bink_decoder_select="dsputil hpeldsp"
1972 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
1973 binkaudio_rdft_decoder_select="mdct rdft sinewin"
1974 cavs_decoder_select="dsputil golomb h264chroma videodsp"
1975 cllc_decoder_select="dsputil"
1976 comfortnoise_encoder_select="lpc"
1977 cook_decoder_select="dsputil mdct sinewin"
1978 cscd_decoder_select="lzo"
1979 cscd_decoder_suggest="zlib"
1980 dca_decoder_select="mdct"
1981 dirac_decoder_select="dsputil dwt golomb videodsp"
1982 dnxhd_decoder_select="dsputil"
1983 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
1984 dvvideo_decoder_select="dsputil"
1985 dvvideo_encoder_select="dsputil"
1986 dxa_decoder_select="zlib"
1987 eac3_decoder_select="ac3_decoder"
1988 eac3_encoder_select="ac3_encoder"
1989 eamad_decoder_select="aandcttables dsputil mpegvideo"
1990 eatgq_decoder_select="aandcttables"
1991 eatqi_decoder_select="aandcttables dsputil error_resilience mpegvideo"
1992 exr_decoder_select="zlib"
1993 ffv1_decoder_select="golomb rangecoder"
1994 ffv1_encoder_select="rangecoder"
1995 ffvhuff_decoder_select="huffyuv_decoder"
1996 ffvhuff_encoder_select="huffyuv_encoder"
1997 fic_decoder_select="dsputil golomb"
1998 flac_decoder_select="golomb"
1999 flac_encoder_select="dsputil golomb lpc"
2000 flashsv_decoder_select="zlib"
2001 flashsv_encoder_select="zlib"
2002 flashsv2_encoder_select="zlib"
2003 flashsv2_decoder_select="zlib"
2004 flv_decoder_select="h263_decoder"
2005 flv_encoder_select="h263_encoder"
2006 fourxm_decoder_select="dsputil"
2007 fraps_decoder_select="dsputil huffman"
2008 g2m_decoder_select="dsputil zlib"
2009 g729_decoder_select="dsputil"
2010 h261_decoder_select="error_resilience mpegvideo"
2011 h261_encoder_select="aandcttables mpegvideoenc"
2012 h263_decoder_select="error_resilience h263_parser h263dsp mpegvideo"
2013 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2014 h263i_decoder_select="h263_decoder"
2015 h263p_encoder_select="h263_encoder"
2016 h264_decoder_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
2017 h264_decoder_suggest="error_resilience"
2018 hevc_decoder_select="dsputil golomb videodsp"
2019 huffyuv_decoder_select="dsputil llviddsp"
2020 huffyuv_encoder_select="dsputil huffman llviddsp"
2021 iac_decoder_select="imc_decoder"
2022 imc_decoder_select="dsputil fft mdct sinewin"
2023 indeo3_decoder_select="hpeldsp"
2024 interplay_video_decoder_select="hpeldsp"
2025 jpegls_decoder_select="golomb mjpeg_decoder"
2026 jpegls_encoder_select="golomb"
2027 jv_decoder_select="dsputil"
2028 lagarith_decoder_select="dsputil"
2029 ljpeg_encoder_select="aandcttables mpegvideoenc"
2030 loco_decoder_select="golomb"
2031 mdec_decoder_select="dsputil error_resilience mpegvideo"
2032 metasound_decoder_select="lsp mdct sinewin"
2033 mimic_decoder_select="dsputil hpeldsp"
2034 mjpeg_decoder_select="dsputil hpeldsp exif"
2035 mjpeg_encoder_select="aandcttables mpegvideoenc"
2036 mjpegb_decoder_select="mjpeg_decoder"
2037 mlp_decoder_select="mlp_parser"
2038 motionpixels_decoder_select="dsputil"
2039 mp1_decoder_select="mpegaudio"
2040 mp1float_decoder_select="mpegaudio"
2041 mp2_decoder_select="mpegaudio"
2042 mp2float_decoder_select="mpegaudio"
2043 mp3_decoder_select="mpegaudio"
2044 mp3adu_decoder_select="mpegaudio"
2045 mp3adufloat_decoder_select="mpegaudio"
2046 mp3float_decoder_select="mpegaudio"
2047 mp3on4_decoder_select="mpegaudio"
2048 mp3on4float_decoder_select="mpegaudio"
2049 mpc7_decoder_select="dsputil mpegaudiodsp"
2050 mpc8_decoder_select="mpegaudiodsp"
2051 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2052 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2053 mpeg1video_decoder_select="error_resilience mpegvideo"
2054 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2055 mpeg2video_decoder_select="error_resilience mpegvideo"
2056 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2057 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2058 mpeg4_encoder_select="h263_encoder"
2059 msmpeg4v1_decoder_select="h263_decoder"
2060 msmpeg4v2_decoder_select="h263_decoder"
2061 msmpeg4v2_encoder_select="h263_encoder"
2062 msmpeg4v3_decoder_select="h263_decoder"
2063 msmpeg4v3_encoder_select="h263_encoder"
2064 mss2_decoder_select="error_resilience vc1_decoder"
2065 mxpeg_decoder_select="mjpeg_decoder"
2066 nellymoser_decoder_select="mdct sinewin"
2067 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2068 nuv_decoder_select="dsputil lzo"
2069 png_decoder_select="zlib"
2070 png_encoder_select="dsputil zlib"
2071 prores_decoder_select="dsputil"
2072 prores_encoder_select="dsputil"
2073 qcelp_decoder_select="lsp"
2074 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2075 ra_144_encoder_select="audio_frame_queue lpc"
2076 ralf_decoder_select="golomb"
2077 rtjpeg_decoder_select="dsputil"
2078 rv10_decoder_select="error_resilience h263_decoder h263dsp"
2079 rv10_encoder_select="h263_encoder"
2080 rv20_decoder_select="error_resilience h263_decoder h263dsp"
2081 rv20_encoder_select="h263_encoder"
2082 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
2083 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
2084 shorten_decoder_select="golomb"
2085 sipr_decoder_select="lsp"
2086 snow_decoder_select="dsputil dwt h264qpel hpeldsp rangecoder"
2087 snow_encoder_select="aandcttables dsputil dwt h264qpel hpeldsp mpegvideoenc rangecoder"
2088 sonic_decoder_select="golomb rangecoder"
2089 sonic_encoder_select="golomb rangecoder"
2090 sonic_ls_encoder_select="golomb"
2091 sp5x_decoder_select="mjpeg_decoder"
2092 svq1_decoder_select="hpeldsp"
2093 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
2094 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2095 svq3_decoder_suggest="zlib"
2096 tak_decoder_select="dsputil"
2097 theora_decoder_select="vp3_decoder"
2098 thp_decoder_select="mjpeg_decoder"
2099 tiff_decoder_suggest="zlib"
2100 tiff_encoder_suggest="zlib"
2101 truehd_decoder_select="mlp_parser"
2102 truemotion2_decoder_select="dsputil"
2103 truespeech_decoder_select="dsputil"
2104 tscc_decoder_select="zlib"
2105 twinvq_decoder_select="mdct lsp sinewin"
2106 utvideo_decoder_select="dsputil"
2107 utvideo_encoder_select="dsputil huffman"
2108 vble_decoder_select="dsputil"
2109 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel intrax8"
2110 vc1image_decoder_select="vc1_decoder"
2111 vorbis_decoder_select="mdct"
2112 vorbis_encoder_select="mdct"
2113 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2114 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
2115 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
2116 vp6a_decoder_select="vp6_decoder"
2117 vp6f_decoder_select="vp6_decoder"
2118 vp8_decoder_select="h264pred videodsp"
2119 vp9_decoder_select="videodsp"
2120 webp_decoder_select="vp8_decoder"
2121 wmapro_decoder_select="mdct sinewin"
2122 wmav1_decoder_select="mdct sinewin"
2123 wmav1_encoder_select="mdct sinewin"
2124 wmav2_decoder_select="mdct sinewin"
2125 wmav2_encoder_select="mdct sinewin"
2126 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2127 wmv1_decoder_select="h263_decoder"
2128 wmv1_encoder_select="h263_encoder"
2129 wmv2_decoder_select="h263_decoder intrax8 videodsp"
2130 wmv2_encoder_select="h263_encoder"
2131 wmv3_decoder_select="vc1_decoder"
2132 wmv3image_decoder_select="wmv3_decoder"
2133 zerocodec_decoder_select="zlib"
2134 zlib_decoder_select="zlib"
2135 zlib_encoder_select="zlib"
2136 zmbv_decoder_select="zlib"
2137 zmbv_encoder_select="zlib"
2138
2139 # hardware accelerators
2140 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2141 dxva2_deps="dxva2api_h"
2142 vaapi_deps="va_va_h"
2143 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2144 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2145 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2146 xvmc_deps="X11_extensions_XvMClib_h"
2147
2148 h263_vaapi_hwaccel_deps="vaapi"
2149 h263_vaapi_hwaccel_select="h263_decoder"
2150 h263_vdpau_hwaccel_deps="vdpau"
2151 h263_vdpau_hwaccel_select="h263_decoder"
2152 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2153 h264_dxva2_hwaccel_deps="dxva2"
2154 h264_dxva2_hwaccel_select="h264_decoder"
2155 h264_vaapi_hwaccel_deps="vaapi"
2156 h264_vaapi_hwaccel_select="h264_decoder"
2157 h264_vda_decoder_deps="vda"
2158 h264_vda_decoder_select="h264_decoder"
2159 h264_vda_hwaccel_deps="vda"
2160 h264_vda_hwaccel_select="h264_decoder"
2161 h264_vdpau_decoder_deps="vdpau"
2162 h264_vdpau_decoder_select="h264_decoder"
2163 h264_vdpau_hwaccel_deps="vdpau"
2164 h264_vdpau_hwaccel_select="h264_decoder"
2165 mpeg_vdpau_decoder_deps="vdpau"
2166 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2167 mpeg_xvmc_hwaccel_deps="xvmc"
2168 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2169 mpeg1_vdpau_decoder_deps="vdpau"
2170 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2171 mpeg1_vdpau_hwaccel_deps="vdpau"
2172 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2173 mpeg1_xvmc_hwaccel_deps="xvmc"
2174 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2175 mpeg2_crystalhd_decoder_select="crystalhd"
2176 mpeg2_dxva2_hwaccel_deps="dxva2"
2177 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2178 mpeg2_vaapi_hwaccel_deps="vaapi"
2179 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2180 mpeg2_vdpau_hwaccel_deps="vdpau"
2181 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2182 mpeg2_xvmc_hwaccel_deps="xvmc"
2183 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2184 mpeg4_crystalhd_decoder_select="crystalhd"
2185 mpeg4_vaapi_hwaccel_deps="vaapi"
2186 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2187 mpeg4_vdpau_decoder_deps="vdpau"
2188 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2189 mpeg4_vdpau_hwaccel_deps="vdpau"
2190 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2191 msmpeg4_crystalhd_decoder_select="crystalhd"
2192 vc1_crystalhd_decoder_select="crystalhd"
2193 vc1_dxva2_hwaccel_deps="dxva2"
2194 vc1_dxva2_hwaccel_select="vc1_decoder"
2195 vc1_vaapi_hwaccel_deps="vaapi"
2196 vc1_vaapi_hwaccel_select="vc1_decoder"
2197 vc1_vdpau_decoder_deps="vdpau"
2198 vc1_vdpau_decoder_select="vc1_decoder"
2199 vc1_vdpau_hwaccel_deps="vdpau"
2200 vc1_vdpau_hwaccel_select="vc1_decoder"
2201 wmv3_crystalhd_decoder_select="crystalhd"
2202 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2203 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2204 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2205 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2206
2207 # parsers
2208 h264_parser_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
2209 hevc_parser_select="hevc_decoder"
2210 mpeg4video_parser_select="error_resilience h263dsp mpegvideo"
2211 mpegvideo_parser_select="error_resilience mpegvideo"
2212 vc1_parser_select="mpegvideo"
2213
2214 # external libraries
2215 libaacplus_encoder_deps="libaacplus"
2216 libcelt_decoder_deps="libcelt"
2217 libfaac_encoder_deps="libfaac"
2218 libfaac_encoder_select="audio_frame_queue"
2219 libfdk_aac_decoder_deps="libfdk_aac"
2220 libfdk_aac_encoder_deps="libfdk_aac"
2221 libfdk_aac_encoder_select="audio_frame_queue"
2222 libgme_demuxer_deps="libgme"
2223 libgsm_decoder_deps="libgsm"
2224 libgsm_encoder_deps="libgsm"
2225 libgsm_ms_decoder_deps="libgsm"
2226 libgsm_ms_encoder_deps="libgsm"
2227 libilbc_decoder_deps="libilbc"
2228 libilbc_encoder_deps="libilbc"
2229 libmodplug_demuxer_deps="libmodplug"
2230 libmp3lame_encoder_deps="libmp3lame"
2231 libmp3lame_encoder_select="audio_frame_queue"
2232 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2233 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2234 libopencore_amrnb_encoder_select="audio_frame_queue"
2235 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2236 libopenjpeg_decoder_deps="libopenjpeg"
2237 libopenjpeg_encoder_deps="libopenjpeg"
2238 libopus_decoder_deps="libopus"
2239 libopus_encoder_deps="libopus"
2240 libopus_encoder_select="audio_frame_queue"
2241 libquvi_demuxer_deps="libquvi"
2242 libschroedinger_decoder_deps="libschroedinger"
2243 libschroedinger_encoder_deps="libschroedinger"
2244 libshine_encoder_deps="libshine"
2245 libshine_encoder_select="audio_frame_queue"
2246 libspeex_decoder_deps="libspeex"
2247 libspeex_encoder_deps="libspeex"
2248 libspeex_encoder_select="audio_frame_queue"
2249 libstagefright_h264_decoder_deps="libstagefright_h264"
2250 libtheora_encoder_deps="libtheora"
2251 libtwolame_encoder_deps="libtwolame"
2252 libvo_aacenc_encoder_deps="libvo_aacenc"
2253 libvo_aacenc_encoder_select="audio_frame_queue"
2254 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2255 libvorbis_decoder_deps="libvorbis"
2256 libvorbis_encoder_deps="libvorbis"
2257 libvorbis_encoder_select="audio_frame_queue"
2258 libvpx_vp8_decoder_deps="libvpx"
2259 libvpx_vp8_encoder_deps="libvpx"
2260 libvpx_vp9_decoder_deps="libvpx"
2261 libvpx_vp9_encoder_deps="libvpx"
2262 libwavpack_encoder_deps="libwavpack"
2263 libwebp_encoder_deps="libwebp"
2264 libx264_encoder_deps="libx264"
2265 libx264rgb_encoder_deps="libx264"
2266 libx265_encoder_deps="libx265"
2267 libxavs_encoder_deps="libxavs"
2268 libxvid_encoder_deps="libxvid"
2269 libutvideo_decoder_deps="libutvideo"
2270 libutvideo_encoder_deps="libutvideo"
2271 libzvbi_teletext_decoder_deps="libzvbi"
2272
2273 # demuxers / muxers
2274 ac3_demuxer_select="ac3_parser"
2275 asf_demuxer_select="riffdec"
2276 asf_muxer_select="riffenc"
2277 asf_stream_muxer_select="asf_muxer"
2278 avi_demuxer_select="riffdec"
2279 avi_muxer_select="riffenc"
2280 avisynth_demuxer_deps="avisynth"
2281 avisynth_demuxer_select="riffdec"
2282 caf_demuxer_select="riffdec"
2283 dirac_demuxer_select="dirac_parser"
2284 dts_demuxer_select="dca_parser"
2285 dtshd_demuxer_select="dca_parser"
2286 dxa_demuxer_select="riffdec"
2287 eac3_demuxer_select="ac3_parser"
2288 f4v_muxer_select="mov_muxer"
2289 flac_demuxer_select="flac_parser"
2290 hds_muxer_select="flv_muxer"
2291 hls_muxer_select="mpegts_muxer"
2292 ipod_muxer_select="mov_muxer"
2293 ismv_muxer_select="mov_muxer"
2294 libnut_demuxer_deps="libnut"
2295 libnut_muxer_deps="libnut"
2296 matroska_audio_muxer_select="matroska_muxer"
2297 matroska_demuxer_select="riffdec"
2298 matroska_demuxer_suggest="bzlib lzo zlib"
2299 matroska_muxer_select="riffenc"
2300 mmf_muxer_select="riffenc"
2301 mov_demuxer_select="riffdec"
2302 mov_demuxer_suggest="zlib"
2303 mov_muxer_select="riffenc rtpenc_chain"
2304 mp3_demuxer_select="mpegaudio_parser"
2305 mp4_muxer_select="mov_muxer"
2306 mpegts_muxer_select="adts_muxer latm_muxer"
2307 mpegtsraw_demuxer_select="mpegts_demuxer"
2308 mxf_d10_muxer_select="mxf_muxer"
2309 nut_muxer_select="riffenc"
2310 nuv_demuxer_select="riffdec"
2311 ogg_demuxer_select="golomb"
2312 psp_muxer_select="mov_muxer"
2313 rtp_demuxer_select="sdp_demuxer"
2314 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2315 rtsp_demuxer_select="http_protocol rtpdec"
2316 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2317 sap_demuxer_select="sdp_demuxer"
2318 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2319 sdp_demuxer_select="rtpdec"
2320 smoothstreaming_muxer_select="ismv_muxer"
2321 spdif_muxer_select="aac_parser"
2322 tak_demuxer_select="tak_parser"
2323 tg2_muxer_select="mov_muxer"
2324 tgp_muxer_select="mov_muxer"
2325 vobsub_demuxer_select="mpegps_demuxer"
2326 w64_demuxer_select="wav_demuxer"
2327 w64_muxer_select="wav_muxer"
2328 wav_demuxer_select="riffdec"
2329 wav_muxer_select="riffenc"
2330 webm_muxer_select="riffenc"
2331 wtv_demuxer_select="riffdec"
2332 wtv_muxer_select="riffenc"
2333 xmv_demuxer_select="riffdec"
2334 xwma_demuxer_select="riffdec"
2335
2336 # indevs / outdevs
2337 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2338 alsa_outdev_deps="alsa_asoundlib_h"
2339 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2340 caca_outdev_deps="libcaca"
2341 decklink_outdev_deps="decklink pthreads"
2342 decklink_outdev_extralibs="-lstdc++"
2343 dshow_indev_deps="IBaseFilter"
2344 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
2345 dv1394_indev_deps="dv1394"
2346 dv1394_indev_select="dv_demuxer"
2347 fbdev_indev_deps="linux_fb_h"
2348 fbdev_outdev_deps="linux_fb_h"
2349 iec61883_indev_deps="libiec61883"
2350 jack_indev_deps="jack_jack_h sem_timedwait"
2351 lavfi_indev_deps="avfilter"
2352 libcdio_indev_deps="libcdio"
2353 libdc1394_indev_deps="libdc1394"
2354 libv4l2_indev_deps="libv4l2"
2355 openal_indev_deps="openal"
2356 opengl_outdev_deps="opengl"
2357 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2358 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2359 pulse_indev_deps="libpulse"
2360 pulse_outdev_deps="libpulse"
2361 sdl_outdev_deps="sdl"
2362 sndio_indev_deps="sndio_h"
2363 sndio_outdev_deps="sndio_h"
2364 v4l_indev_deps="linux_videodev_h"
2365 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2366 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2367 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2368 vfwcap_indev_extralibs="-lavicap32"
2369 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2370 xv_outdev_extralibs="-lXv -lX11 -lXext"
2371 x11grab_indev_deps="x11grab"
2372
2373 # protocols
2374 bluray_protocol_deps="libbluray"
2375 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2376 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2377 ffrtmpcrypt_protocol_select="tcp_protocol"
2378 ffrtmphttp_protocol_deps="!librtmp_protocol"
2379 ffrtmphttp_protocol_select="http_protocol"
2380 ftp_protocol_select="tcp_protocol"
2381 gopher_protocol_select="network"
2382 http_protocol_select="tcp_protocol"
2383 httpproxy_protocol_select="tcp_protocol"
2384 https_protocol_select="tls_protocol"
2385 librtmp_protocol_deps="librtmp"
2386 librtmpe_protocol_deps="librtmp"
2387 librtmps_protocol_deps="librtmp"
2388 librtmpt_protocol_deps="librtmp"
2389 librtmpte_protocol_deps="librtmp"
2390 libssh_protocol_deps="libssh"
2391 mmsh_protocol_select="http_protocol"
2392 mmst_protocol_select="network"
2393 rtmp_protocol_deps="!librtmp_protocol"
2394 rtmp_protocol_select="tcp_protocol"
2395 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2396 rtmps_protocol_deps="!librtmp_protocol"
2397 rtmps_protocol_select="tls_protocol"
2398 rtmpt_protocol_select="ffrtmphttp_protocol"
2399 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2400 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2401 rtp_protocol_select="udp_protocol"
2402 sctp_protocol_deps="struct_sctp_event_subscribe"
2403 sctp_protocol_select="network"
2404 srtp_protocol_select="rtp_protocol"
2405 tcp_protocol_select="network"
2406 tls_protocol_deps_any="openssl gnutls"
2407 tls_protocol_select="tcp_protocol"
2408 udp_protocol_select="network"
2409 unix_protocol_deps="sys_un_h"
2410 unix_protocol_select="network"
2411
2412 # filters
2413 aconvert_filter_deps="swresample"
2414 amovie_filter_deps="avcodec avformat"
2415 aresample_filter_deps="swresample"
2416 ass_filter_deps="libass"
2417 asyncts_filter_deps="avresample"
2418 atempo_filter_deps="avcodec"
2419 atempo_filter_select="rdft"
2420 azmq_filter_deps="libzmq"
2421 blackframe_filter_deps="gpl"
2422 boxblur_filter_deps="gpl"
2423 colormatrix_filter_deps="gpl"
2424 cropdetect_filter_deps="gpl"
2425 dctdnoiz_filter_deps="avcodec"
2426 dctdnoiz_filter_select="dct"
2427 delogo_filter_deps="gpl"
2428 deshake_filter_deps="avcodec"
2429 deshake_filter_select="dsputil"
2430 drawtext_filter_deps="libfreetype"
2431 ebur128_filter_deps="gpl"
2432 flite_filter_deps="libflite"
2433 frei0r_filter_deps="frei0r dlopen"
2434 frei0r_filter_extralibs='$ldl'
2435 frei0r_src_filter_deps="frei0r dlopen"
2436 frei0r_src_filter_extralibs='$ldl'
2437 geq_filter_deps="gpl"
2438 histeq_filter_deps="gpl"
2439 hqdn3d_filter_deps="gpl"
2440 interlace_filter_deps="gpl"
2441 kerndeint_filter_deps="gpl"
2442 ladspa_filter_deps="ladspa dlopen"
2443 mcdeint_filter_deps="avcodec gpl"
2444 movie_filter_deps="avcodec avformat"
2445 mp_filter_deps="gpl avcodec swscale inline_asm"
2446 mpdecimate_filter_deps="gpl avcodec"
2447 mptestsrc_filter_deps="gpl"
2448 negate_filter_deps="lut_filter"
2449 perspective_filter_deps="gpl"
2450 ocv_filter_deps="libopencv"
2451 owdenoise_filter_deps="gpl"
2452 pan_filter_deps="swresample"
2453 phase_filter_deps="gpl"
2454 pp_filter_deps="gpl postproc"
2455 pullup_filter_deps="gpl"
2456 removelogo_filter_deps="avcodec avformat swscale"
2457 resample_filter_deps="avresample"
2458 sab_filter_deps="gpl swscale"
2459 scale_filter_deps="swscale"
2460 smartblur_filter_deps="gpl swscale"
2461 showspectrum_filter_deps="avcodec"
2462 showspectrum_filter_select="rdft"
2463 spp_filter_deps="gpl avcodec"
2464 spp_filter_select="fft"
2465 stereo3d_filter_deps="gpl"
2466 subtitles_filter_deps="avformat avcodec libass"
2467 super2xsai_filter_deps="gpl"
2468 tinterlace_filter_deps="gpl"
2469 vidstabdetect_filter_deps="libvidstab"
2470 vidstabtransform_filter_deps="libvidstab"
2471 pixfmts_super2xsai_test_deps="super2xsai_filter"
2472 tinterlace_merge_test_deps="tinterlace_filter"
2473 tinterlace_pad_test_deps="tinterlace_filter"
2474 zmq_filter_deps="libzmq"
2475
2476 # examples
2477 avio_reading="avformat avcodec avutil"
2478 avcodec_example_deps="avcodec avutil"
2479 demuxing_decoding_example_deps="avcodec avformat avutil"
2480 filter_audio_example_deps="avfilter avutil"
2481 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2482 filtering_video_example_deps="avfilter avcodec avformat avutil"
2483 metadata_example_deps="avformat avutil"
2484 muxing_example_deps="avcodec avformat avutil swscale"
2485 remuxing_example_deps="avcodec avformat avutil"
2486 resampling_audio_example_deps="avutil swresample"
2487 scaling_video_example_deps="avutil swscale"
2488 transcode_aac_example_deps="avcodec avformat swresample"
2489 transcoding_example_deps="avfilter avcodec avformat avutil"
2490
2491 # libraries
2492 avcodec_deps="avutil"
2493 avdevice_deps="avutil avcodec avformat"
2494 avfilter_deps="avutil"
2495 avformat_deps="avutil avcodec"
2496 avresample_deps="avutil"
2497 postproc_deps="avutil gpl"
2498 swscale_deps="avutil"
2499
2500 # programs
2501 ffmpeg_deps="avcodec avfilter avformat swresample"
2502 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2503                null_filter
2504                setpts_filter trim_filter"
2505 ffplay_deps="avcodec avformat swscale swresample sdl"
2506 ffplay_libs='$sdl_libs'
2507 ffplay_select="rdft crop_filter"
2508 ffprobe_deps="avcodec avformat"
2509 ffserver_deps="avformat fork sarestart"
2510 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2511
2512 # documentation
2513 podpages_deps="perl"
2514 manpages_deps="perl pod2man"
2515 htmlpages_deps="perl texi2html"
2516 txtpages_deps="perl makeinfo"
2517 doc_deps_any="manpages htmlpages podpages txtpages"
2518
2519 # default parameters
2520
2521 logfile="config.log"
2522
2523 # installation paths
2524 prefix_default="/usr/local"
2525 bindir_default='${prefix}/bin'
2526 datadir_default='${prefix}/share/ffmpeg'
2527 docdir_default='${prefix}/share/doc/ffmpeg'
2528 incdir_default='${prefix}/include'
2529 libdir_default='${prefix}/lib'
2530 mandir_default='${prefix}/share/man'
2531 shlibdir_default="$libdir_default"
2532
2533 # toolchain
2534 ar_default="ar"
2535 cc_default="gcc"
2536 cxx_default="g++"
2537 host_cc_default="gcc"
2538 cp_f="cp -f"
2539 install="install"
2540 ln_s="ln -s -f"
2541 nm_default="nm -g"
2542 objformat="elf"
2543 pkg_config_default=pkg-config
2544 ranlib="ranlib"
2545 strip_default="strip"
2546 yasmexe_default="yasm"
2547 windres_default="windres"
2548
2549 nogas=":"
2550
2551 # OS
2552 target_os_default=$(tolower $(uname -s))
2553 host_os=$target_os_default
2554
2555 # machine
2556 if test "$target_os_default" = aix; then
2557     arch_default=$(uname -p)
2558 else
2559     arch_default=$(uname -m)
2560 fi
2561 cpu="generic"
2562
2563 # configurable options
2564 enable $PROGRAM_LIST
2565 enable $DOCUMENT_LIST
2566 enable $EXAMPLE_LIST
2567 enable $(filter_out avresample $LIBRARY_LIST)
2568 enable stripping
2569
2570 enable asm
2571 enable debug
2572 enable doc
2573 enable optimizations
2574 enable runtime_cpudetect
2575 enable safe_bitstream_reader
2576 enable static
2577 enable swscale_alpha
2578
2579 # Enable hwaccels by default.
2580 enable dxva2 vaapi vdpau xvmc
2581 enable xlib
2582
2583 # build settings
2584 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2585 LIBPREF="lib"
2586 LIBSUF=".a"
2587 FULLNAME='$(NAME)$(BUILDSUF)'
2588 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2589 SLIBPREF="lib"
2590 SLIBSUF=".so"
2591 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2592 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2593 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2594 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2595 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2596 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2597
2598 asflags_filter=echo
2599 cflags_filter=echo
2600 ldflags_filter=echo
2601
2602 AS_C='-c'
2603 AS_O='-o $@'
2604 CC_C='-c'
2605 CC_E='-E -o $@'
2606 CC_O='-o $@'
2607 CXX_C='-c'
2608 CXX_O='-o $@'
2609 LD_O='-o $@'
2610 LD_LIB='-l%'
2611 LD_PATH='-L'
2612 HOSTCC_C='-c'
2613 HOSTCC_E='-E -o $@'
2614 HOSTCC_O='-o $@'
2615 HOSTLD_O='-o $@'
2616
2617 host_libs='-lm'
2618 host_cflags_filter=echo
2619 host_ldflags_filter=echo
2620
2621 target_path='$(CURDIR)'
2622
2623 # since the object filename is not given with the -MM flag, the compiler
2624 # is only able to print the basename, and we must add the path ourselves
2625 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2626 DEPFLAGS='-MM'
2627
2628 # find source path
2629 if test -f configure; then
2630     source_path=.
2631 else
2632     source_path=$(cd $(dirname "$0"); pwd)
2633     echo "$source_path" | grep -q '[[:blank:]]' &&
2634         die "Out of tree builds are impossible with whitespace in source path."
2635     test -e "$source_path/config.h" &&
2636         die "Out of tree builds are impossible with config.h in source dir."
2637 fi
2638
2639 for v in "$@"; do
2640     r=${v#*=}
2641     l=${v%"$r"}
2642     r=$(sh_quote "$r")
2643     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2644 done
2645
2646 find_things(){
2647     thing=$1
2648     pattern=$2
2649     file=$source_path/$3
2650     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2651 }
2652
2653 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2654 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2655 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2656 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2657 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2658 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2659 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2660 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2661 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2662 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2663 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2664
2665 ALL_COMPONENTS="
2666     $BSF_LIST
2667     $DECODER_LIST
2668     $DEMUXER_LIST
2669     $ENCODER_LIST
2670     $FILTER_LIST
2671     $HWACCEL_LIST
2672     $INDEV_LIST
2673     $MUXER_LIST
2674     $OUTDEV_LIST
2675     $PARSER_LIST
2676     $PROTOCOL_LIST
2677 "
2678
2679 for n in $COMPONENT_LIST; do
2680     v=$(toupper ${n%s})_LIST
2681     eval enable \$$v
2682     eval ${n}_if_any="\$$v"
2683 done
2684
2685 enable $ARCH_EXT_LIST
2686
2687 die_unknown(){
2688     echo "Unknown option \"$1\"."
2689     echo "See $0 --help for available options."
2690     exit 1
2691 }
2692
2693 print_3_columns() {
2694     cat | tr ' ' '\n' | sort | pr -r -3 -t
2695 }
2696
2697 show_list() {
2698     suffix=_$1
2699     shift
2700     echo $* | sed s/$suffix//g | print_3_columns
2701     exit 0
2702 }
2703
2704 rand_list(){
2705     IFS=', '
2706     set -- $*
2707     unset IFS
2708     for thing; do
2709         comp=${thing%:*}
2710         prob=${thing#$comp}
2711         prob=${prob#:}
2712         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2713         echo "prob ${prob:-0.5}"
2714         printf '%s\n' $comp
2715     done
2716 }
2717
2718 do_random(){
2719     action=$1
2720     shift
2721     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2722     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2723 }
2724
2725 for opt do
2726     optval="${opt#*=}"
2727     case "$opt" in
2728         --extra-ldflags=*)
2729             add_ldflags $optval
2730         ;;
2731         --extra-libs=*)
2732             add_extralibs $optval
2733         ;;
2734         --disable-devices)
2735             disable $INDEV_LIST $OUTDEV_LIST
2736         ;;
2737         --enable-debug=*)
2738             debuglevel="$optval"
2739         ;;
2740         --disable-programs)
2741             disable $PROGRAM_LIST
2742         ;;
2743         --disable-everything)
2744             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2745         ;;
2746         --disable-all)
2747             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2748             disable $LIBRARY_LIST $PROGRAM_LIST doc
2749         ;;
2750         --enable-random|--disable-random)
2751             action=${opt%%-random}
2752             do_random ${action#--} $COMPONENT_LIST
2753         ;;
2754         --enable-random=*|--disable-random=*)
2755             action=${opt%%-random=*}
2756             do_random ${action#--} $optval
2757         ;;
2758         --enable-*=*|--disable-*=*)
2759             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2760             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2761             eval list=\$$(toupper $thing)_LIST
2762             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2763             list=$(filter "$name" $list)
2764             [ "$list" = "" ] && warn "Option $opt did not match anything"
2765             $action $list
2766         ;;
2767         --enable-?*|--disable-?*)
2768             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2769             if is_in $option $COMPONENT_LIST; then
2770                 test $action = disable && action=unset
2771                 eval $action \$$(toupper ${option%s})_LIST
2772             elif is_in $option $CMDLINE_SELECT; then
2773                 $action $option
2774             else
2775                 die_unknown $opt
2776             fi
2777         ;;
2778         --list-*)
2779             NAME="${opt#--list-}"
2780             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2781             NAME=${NAME%s}
2782             eval show_list $NAME \$$(toupper $NAME)_LIST
2783         ;;
2784         --help|-h) show_help
2785         ;;
2786         --fatal-warnings) enable fatal_warnings
2787         ;;
2788         *)
2789             optname="${opt%%=*}"
2790             optname="${optname#--}"
2791             optname=$(echo "$optname" | sed 's/-/_/g')
2792             if is_in $optname $CMDLINE_SET; then
2793                 eval $optname='$optval'
2794             elif is_in $optname $CMDLINE_APPEND; then
2795                 append $optname "$optval"
2796             else
2797                 die_unknown $opt
2798             fi
2799         ;;
2800     esac
2801 done
2802
2803 disabled logging && logfile=/dev/null
2804
2805 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2806 set >> $logfile
2807
2808 test -n "$cross_prefix" && enable cross_compile
2809
2810 if enabled cross_compile; then
2811     test -n "$arch" && test -n "$target_os" ||
2812         die "Must specify target arch and OS when cross-compiling"
2813 fi
2814
2815 ar_default="${cross_prefix}${ar_default}"
2816 cc_default="${cross_prefix}${cc_default}"
2817 cxx_default="${cross_prefix}${cxx_default}"
2818 nm_default="${cross_prefix}${nm_default}"
2819 pkg_config_default="${cross_prefix}${pkg_config_default}"
2820 ranlib="${cross_prefix}${ranlib}"
2821 strip_default="${cross_prefix}${strip_default}"
2822 windres_default="${cross_prefix}${windres_default}"
2823
2824 sysinclude_default="${sysroot}/usr/include"
2825
2826 test -n "$valgrind" && toolchain="valgrind-memcheck"
2827
2828 case "$toolchain" in
2829     clang-asan)
2830         cc_default="clang"
2831         add_cflags  -fsanitize=address
2832         add_ldflags -fsanitize=address
2833     ;;
2834     clang-tsan)
2835         cc_default="clang"
2836         add_cflags  -fsanitize=thread -pie
2837         add_ldflags -fsanitize=thread -pie
2838     ;;
2839     clang-usan)
2840         cc_default="clang"
2841         add_cflags  -fsanitize=undefined
2842         add_ldflags -fsanitize=undefined
2843     ;;
2844     gcc-asan)
2845         cc_default="gcc"
2846         add_cflags  -fsanitize=address
2847         add_ldflags -fsanitize=address
2848     ;;
2849     gcc-tsan)
2850         cc_default="gcc"
2851         add_cflags  -fsanitize=thread -pie -fPIC
2852         add_ldflags -fsanitize=thread -pie -fPIC
2853     ;;
2854     gcc-usan)
2855         cc_default="gcc"
2856         add_cflags  -fsanitize=undefined
2857         add_ldflags -fsanitize=undefined
2858     ;;
2859     valgrind-massif)
2860         target_exec_default=${valgrind:-"valgrind"}
2861         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"
2862     ;;
2863     valgrind-memcheck)
2864         target_exec_default=${valgrind:-"valgrind"}
2865         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
2866     ;;
2867     msvc)
2868         # Check whether the current MSVC version needs the C99 converter.
2869         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2870         # support enough of C99 to build ffmpeg. Default to the new
2871         # behaviour if the regexp was unable to match anything, since this
2872         # successfully parses the version number of existing supported
2873         # versions that require the converter (MSVC 2010 and 2012).
2874         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2875         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2876             cc_default="cl"
2877         else
2878             cc_default="c99wrap cl"
2879         fi
2880         ld_default="link"
2881         nm_default="dumpbin -symbols"
2882         ar_default="lib"
2883         target_os_default="win32"
2884         # Use a relative path for TMPDIR. This makes sure all the
2885         # ffconf temp files are written with a relative path, avoiding
2886         # issues with msys/win32 path conversion for MSVC parameters
2887         # such as -Fo<file> or -out:<file>.
2888         TMPDIR=.
2889     ;;
2890     icl)
2891         cc_default="icl"
2892         ld_default="xilink"
2893         nm_default="dumpbin -symbols"
2894         ar_default="xilib"
2895         target_os_default="win32"
2896         TMPDIR=.
2897     ;;
2898     gcov)
2899         add_cflags  -fprofile-arcs -ftest-coverage
2900         add_ldflags -fprofile-arcs -ftest-coverage
2901     ;;
2902     hardened)
2903         add_cflags  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2904         add_ldflags -Wl,-z,relro -Wl,-z,now
2905     ;;
2906     ?*)
2907         die "Unknown toolchain $toolchain"
2908     ;;
2909 esac
2910
2911 set_default arch cc cxx pkg_config strip sysinclude target_exec target_os yasmexe
2912 enabled cross_compile || host_cc_default=$cc
2913 set_default host_cc
2914
2915 if ! $pkg_config --version >/dev/null 2>&1; then
2916     warn "$pkg_config not found, library detection may fail."
2917     pkg_config=false
2918 fi
2919
2920 exesuf() {
2921     case $1 in
2922         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2923     esac
2924 }
2925
2926 EXESUF=$(exesuf $target_os)
2927 HOSTEXESUF=$(exesuf $host_os)
2928
2929 # set temporary file name
2930 : ${TMPDIR:=$TEMPDIR}
2931 : ${TMPDIR:=$TMP}
2932 : ${TMPDIR:=/tmp}
2933
2934 if [ -n "$tempprefix" ] ; then
2935     mktemp(){
2936         echo $tempprefix.${HOSTNAME}.${UID}
2937     }
2938 elif ! check_cmd mktemp -u XXXXXX; then
2939     # simple replacement for missing mktemp
2940     # NOT SAFE FOR GENERAL USE
2941     mktemp(){
2942         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2943     }
2944 fi
2945
2946 tmpfile(){
2947     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2948         (set -C; exec > $tmp) 2>/dev/null ||
2949         die "Unable to create temporary file in $TMPDIR."
2950     append TMPFILES $tmp
2951     eval $1=$tmp
2952 }
2953
2954 trap 'rm -f -- $TMPFILES' EXIT
2955
2956 tmpfile TMPASM .asm
2957 tmpfile TMPC   .c
2958 tmpfile TMPCPP .cpp
2959 tmpfile TMPE   $EXESUF
2960 tmpfile TMPH   .h
2961 tmpfile TMPO   .o
2962 tmpfile TMPS   .S
2963 tmpfile TMPSH  .sh
2964 tmpfile TMPV   .ver
2965
2966 unset -f mktemp
2967
2968 chmod +x $TMPE
2969
2970 # make sure we can execute files in $TMPDIR
2971 cat > $TMPSH 2>> $logfile <<EOF
2972 #! /bin/sh
2973 EOF
2974 chmod +x $TMPSH >> $logfile 2>&1
2975 if ! $TMPSH >> $logfile 2>&1; then
2976     cat <<EOF
2977 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2978 variable to another directory and make sure that it is not mounted noexec.
2979 EOF
2980     die "Sanity test failed."
2981 fi
2982
2983 ccc_flags(){
2984     for flag; do
2985         case $flag in
2986             -std=c99)           echo -c99                       ;;
2987             -mcpu=*)            echo -arch ${flag#*=}           ;;
2988             -mieee)             echo -ieee                      ;;
2989             -O*|-fast)          echo $flag                      ;;
2990             -fno-math-errno)    echo -assume nomath_errno       ;;
2991             -g)                 echo -g3                        ;;
2992             -Wall)              echo -msg_enable level2         ;;
2993             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2994             -Wl,*)              echo $flag                      ;;
2995             -f*|-W*)                                            ;;
2996             *)                  echo $flag                      ;;
2997         esac
2998    done
2999 }
3000
3001 cparser_flags(){
3002     for flag; do
3003         case $flag in
3004             -Wno-switch)             echo -Wno-switch-enum ;;
3005             -Wno-format-zero-length) ;;
3006             -Wdisabled-optimization) ;;
3007             -Wno-pointer-sign)       echo -Wno-other ;;
3008             *)                       echo $flag ;;
3009         esac
3010     done
3011 }
3012
3013 msvc_common_flags(){
3014     for flag; do
3015         case $flag in
3016             # In addition to specifying certain flags under the compiler
3017             # specific filters, they must be specified here as well or else the
3018             # generic catch all at the bottom will print the original flag.
3019             -Wall)                ;;
3020             -std=c99)             ;;
3021             # Common flags
3022             -fomit-frame-pointer) ;;
3023             -g)                   echo -Z7 ;;
3024             -fno-math-errno)      ;;
3025             -fno-common)          ;;
3026             -fno-signed-zeros)    ;;
3027             -fPIC)                ;;
3028             -mthumb)              ;;
3029             -march=*)             ;;
3030             -lz)                  echo zlib.lib ;;
3031             -lavifil32)           echo vfw32.lib ;;
3032             -lavicap32)           echo vfw32.lib user32.lib ;;
3033             -l*)                  echo ${flag#-l}.lib ;;
3034             *)                    echo $flag ;;
3035         esac
3036     done
3037 }
3038
3039 msvc_flags(){
3040     msvc_common_flags "$@"
3041     for flag; do
3042         case $flag in
3043             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3044                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3045                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3046                                        -wd4554 \
3047                                        -wd4273 ;;
3048         esac
3049     done
3050 }
3051
3052 icl_flags(){
3053     msvc_common_flags "$@"
3054     for flag; do
3055         case $flag in
3056             # Despite what Intel's documentation says -Wall, which is supported
3057             # on Windows, does enable remarks so disable them here.
3058             -Wall)                echo $flag -Qdiag-disable:remark ;;
3059             -std=c99)             echo -Qstd=c99 ;;
3060         esac
3061     done
3062 }
3063
3064 pgi_flags(){
3065     for flag; do
3066         case $flag in
3067             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3068             -fomit-frame-pointer) echo -Mnoframe ;;
3069             -g)                   echo -gopt ;;
3070             *)                    echo $flag ;;
3071         esac
3072     done
3073 }
3074
3075 suncc_flags(){
3076     for flag; do
3077         case $flag in
3078             -march=*|-mcpu=*)
3079                 case "${flag#*=}" in
3080                     native)                   echo -xtarget=native       ;;
3081                     v9|niagara)               echo -xarch=sparc          ;;
3082                     ultrasparc)               echo -xarch=sparcvis       ;;
3083                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3084                     i586|pentium)             echo -xchip=pentium        ;;
3085                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3086                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3087                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3088                     pentium4*)          echo -xtarget=pentium4           ;;
3089                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3090                     *-sse3)             echo -xarch=sse3                 ;;
3091                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3092                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3093                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3094                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
3095                     bdver*)                    echo -xarch=avx           ;;
3096                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3097                     k8|opteron|athlon64|athlon-fx)
3098                                                echo -xarch=sse2a         ;;
3099                     athlon*)                   echo -xarch=pentium_proa  ;;
3100                 esac
3101                 ;;
3102             -std=c99)             echo -xc99              ;;
3103             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3104             -fPIC)                echo -KPIC -xcode=pic32 ;;
3105             -W*,*)                echo $flag              ;;
3106             -f*-*|-W*|-mimpure-text)                      ;;
3107             -shared)              echo -G                 ;;
3108             *)                    echo $flag              ;;
3109         esac
3110     done
3111 }
3112
3113 tms470_flags(){
3114     for flag; do
3115         case $flag in
3116             -march=*|-mcpu=*)
3117                 case "${flag#*=}" in
3118                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3119                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3120                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3121                     armv6*|arm11*)          echo -mv=6   ;;
3122                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3123                                             echo -mv=5e  ;;
3124                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3125                 esac
3126                 ;;
3127             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3128             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3129             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3130             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3131             -msoft-float)   echo --float_support=vfplib       ;;
3132             -O[0-3]|-mf=*)  echo $flag                        ;;
3133             -g)             echo -g -mn                       ;;
3134             -pds=*)         echo $flag                        ;;
3135             -D*|-I*)        echo $flag                        ;;
3136             --gcc|--abi=*)  echo $flag                        ;;
3137             -me)            echo $flag                        ;;
3138         esac
3139     done
3140 }
3141
3142 probe_cc(){
3143     pfx=$1
3144     _cc=$2
3145
3146     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3147     unset _ld_o _ldflags _ld_lib _ld_path
3148     unset _depflags _DEPCMD _DEPFLAGS
3149     _flags_filter=echo
3150
3151     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3152         true # no-op to avoid reading stdin in following checks
3153     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3154         _type=llvm_gcc
3155         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
3156         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
3157         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3158         _cflags_speed='-O3'
3159         _cflags_size='-Os'
3160     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3161         _type=gcc
3162         gcc_version=$($_cc --version | head -n1)
3163         gcc_basever=$($_cc -dumpversion)
3164         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3165         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3166         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3167         if ! $_cc -dumpversion | grep -q '^2\.'; then
3168             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3169         fi
3170         _cflags_speed='-O3'
3171         _cflags_size='-Os'
3172     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3173         _type=icc
3174         _ident=$($_cc --version | head -n1)
3175         _depflags='-MMD'
3176         _cflags_speed='-O3'
3177         _cflags_size='-Os'
3178         _cflags_noopt='-O1'
3179     elif $_cc -v 2>&1 | grep -q xlc; then
3180         _type=xlc
3181         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3182         _cflags_speed='-O5'
3183         _cflags_size='-O5 -qcompact'
3184     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3185         _type=ccc
3186         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3187         _DEPFLAGS='-M'
3188         _cflags_speed='-fast'
3189         _cflags_size='-O1'
3190         _flags_filter=ccc_flags
3191     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM C/C[+][+] Compiler|Component: ARM Compiler "; then
3192         test -d "$sysroot" || die "No valid sysroot specified."
3193         _type=armcc
3194         _ident=$($_cc --vsn | head -n1)
3195         armcc_conf="$PWD/armcc.conf"
3196         $_cc --arm_linux_configure                 \
3197              --arm_linux_config_file="$armcc_conf" \
3198              --configure_sysroot="$sysroot"        \
3199              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3200              die "Error creating armcc configuration file."
3201         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3202         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3203         as_default="${cross_prefix}gcc"
3204         _depflags='-MMD'
3205         _cflags_speed='-O3'
3206         _cflags_size='-Os'
3207     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3208         _type=tms470
3209         _ident=$($_cc -version | head -n1 | tr -s ' ')
3210         _flags='--gcc --abi=eabi -me'
3211         _cc_e='-ppl -fe=$@'
3212         _cc_o='-fe=$@'
3213         _depflags='-ppa -ppd=$(@:.o=.d)'
3214         _cflags_speed='-O3 -mf=5'
3215         _cflags_size='-O3 -mf=2'
3216         _flags_filter=tms470_flags
3217     elif $_cc -v 2>&1 | grep -q clang; then
3218         _type=clang
3219         _ident=$($_cc --version | head -n1)
3220         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3221         _cflags_speed='-O3'
3222         _cflags_size='-Os'
3223     elif $_cc -V 2>&1 | grep -q Sun; then
3224         _type=suncc
3225         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3226         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3227         _DEPFLAGS='-xM1 -xc99'
3228         _ldflags='-std=c99'
3229         _cflags_speed='-O5'
3230         _cflags_size='-O5 -xspace'
3231         _flags_filter=suncc_flags
3232     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3233         _type=pathscale
3234         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3235         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3236         _cflags_speed='-O2'
3237         _cflags_size='-Os'
3238         _flags_filter='filter_out -Wdisabled-optimization'
3239     elif $_cc -v 2>&1 | grep -q Open64; then
3240         _type=open64
3241         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3242         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3243         _cflags_speed='-O2'
3244         _cflags_size='-Os'
3245         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3246     elif $_cc -V 2>&1 | grep -q Portland; then
3247         _type=pgi
3248         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3249         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3250         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3251         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3252         _cflags_noopt="-O"
3253         _flags_filter=pgi_flags
3254     elif $_cc 2>&1 | grep -q Microsoft; then
3255         _type=msvc
3256         _ident=$($cc 2>&1 | head -n1)
3257         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3258         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3259         _cflags_speed="-O2"
3260         _cflags_size="-O1"
3261         if $_cc 2>&1 | grep -q Linker; then
3262             _ld_o='-out:$@'
3263         else
3264             _ld_o='-Fe$@'
3265         fi
3266         _cc_o='-Fo$@'
3267         _cc_e='-P -Fi$@'
3268         _flags_filter=msvc_flags
3269         _ld_lib='lib%.a'
3270         _ld_path='-libpath:'
3271         _flags='-nologo'
3272         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3273         if [ $pfx = hostcc ]; then
3274             append _cflags -Dsnprintf=_snprintf
3275         fi
3276         disable stripping
3277     elif $_cc 2>&1 | grep -q Intel; then
3278         _type=icl
3279         _ident=$($cc 2>&1 | head -n1)
3280         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3281         # Not only is O3 broken on 13.x+ but it is slower on all previous
3282         # versions (tested) as well.
3283         _cflags_speed="-O2"
3284         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3285         if $_cc 2>&1 | grep -q Linker; then
3286             _ld_o='-out:$@'
3287         else
3288             _ld_o='-Fe$@'
3289         fi
3290         _cc_o='-Fo$@'
3291         _cc_e='-P'
3292         _flags_filter=icl_flags
3293         _ld_lib='lib%.a'
3294         _ld_path='-libpath:'
3295         # -Qdiag-error to make icl error when seeing certain unknown arguments
3296         _flags='-nologo -Qdiag-error:4044,10157'
3297         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3298         # with MSVC which enables it by default.
3299         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
3300         if [ $pfx = hostcc ]; then
3301             append _cflags -Dsnprintf=_snprintf
3302         fi
3303     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3304         _type=cparser
3305         _ident=$($_cc --version | head -n1)
3306         _depflags='-MMD'
3307         _cflags_speed='-O4'
3308         _cflags_size='-O2'
3309         _flags_filter=cparser_flags
3310     fi
3311
3312     eval ${pfx}_type=\$_type
3313     eval ${pfx}_ident=\$_ident
3314 }
3315
3316 set_ccvars(){
3317     eval ${1}_C=\${_cc_c-\${${1}_C}}
3318     eval ${1}_E=\${_cc_e-\${${1}_E}}
3319     eval ${1}_O=\${_cc_o-\${${1}_O}}
3320
3321     if [ -n "$_depflags" ]; then
3322         eval ${1}_DEPFLAGS=\$_depflags
3323     else
3324         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3325         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3326         eval DEP${1}FLAGS=\$_flags
3327     fi
3328 }
3329
3330 probe_cc cc "$cc"
3331 cflags_filter=$_flags_filter
3332 cflags_speed=$_cflags_speed
3333 cflags_size=$_cflags_size
3334 cflags_noopt=$_cflags_noopt
3335 add_cflags $_flags $_cflags
3336 cc_ldflags=$_ldflags
3337 set_ccvars CC
3338
3339 probe_cc hostcc "$host_cc"
3340 host_cflags_filter=$_flags_filter
3341 add_host_cflags  $_flags $_cflags
3342 set_ccvars HOSTCC
3343
3344 test -n "$cc_type" && enable $cc_type ||
3345     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3346
3347 : ${as_default:=$cc}
3348 : ${dep_cc_default:=$cc}
3349 : ${ld_default:=$cc}
3350 : ${host_ld_default:=$host_cc}
3351 set_default ar as dep_cc ld host_ld windres
3352
3353 probe_cc as "$as"
3354 asflags_filter=$_flags_filter
3355 add_asflags $_flags $_cflags
3356 set_ccvars AS
3357
3358 probe_cc ld "$ld"
3359 ldflags_filter=$_flags_filter
3360 add_ldflags $_flags $_ldflags
3361 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3362 LD_O=${_ld_o-$LD_O}
3363 LD_LIB=${_ld_lib-$LD_LIB}
3364 LD_PATH=${_ld_path-$LD_PATH}
3365
3366 probe_cc hostld "$host_ld"
3367 host_ldflags_filter=$_flags_filter
3368 add_host_ldflags $_flags $_ldflags
3369 HOSTLD_O=${_ld_o-$HOSTLD_O}
3370
3371 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3372     probe_cc depcc "$dep_cc"
3373     CCDEP=${_DEPCMD:-$DEPCMD}
3374     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3375     DEPCCFLAGS=$_flags
3376 fi
3377
3378 if $ar 2>&1 | grep -q Microsoft; then
3379     arflags="-nologo"
3380     ar_o='-out:$@'
3381 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3382     arflags="rq"
3383     ar_o='$@'
3384 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3385     arflags='-Xany -r -c'
3386     ar_o='$@'
3387 else
3388     arflags="rc"
3389     ar_o='$@'
3390 fi
3391
3392 add_cflags $extra_cflags
3393 add_cxxflags $extra_cxxflags
3394 add_asflags $extra_cflags
3395
3396 if test -n "$sysroot"; then
3397     case "$cc_type" in
3398         gcc|llvm_gcc|clang)
3399             add_cppflags --sysroot="$sysroot"
3400             add_ldflags --sysroot="$sysroot"
3401         ;;
3402         tms470)
3403             add_cppflags -I"$sysinclude"
3404             add_ldflags  --sysroot="$sysroot"
3405         ;;
3406     esac
3407 fi
3408
3409 if test "$cpu" = host; then
3410     enabled cross_compile &&
3411         die "--cpu=host makes no sense when cross-compiling."
3412
3413     case "$cc_type" in
3414         gcc|llvm_gcc)
3415             check_native(){
3416                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3417                 sed -n "/cc1.*$1=/{
3418                             s/.*$1=\\([^ ]*\\).*/\\1/
3419                             p
3420                             q
3421                         }" $TMPE
3422             }
3423             cpu=$(check_native -march || check_native -mcpu)
3424         ;;
3425     esac
3426
3427     test "${cpu:-host}" = host &&
3428         die "--cpu=host not supported with compiler $cc"
3429 fi
3430
3431 # Deal with common $arch aliases
3432 case "$arch" in
3433     aarch64|arm64)
3434         arch="aarch64"
3435     ;;
3436     arm*|iPad*|iPhone*)
3437         arch="arm"
3438     ;;
3439     mips*|IP*)
3440         arch="mips"
3441     ;;
3442     parisc*|hppa*)
3443         arch="parisc"
3444     ;;
3445     "Power Macintosh"|ppc*|powerpc*)
3446         arch="ppc"
3447     ;;
3448     s390|s390x)
3449         arch="s390"
3450     ;;
3451     sh4|sh)
3452         arch="sh4"
3453     ;;
3454     sun4u|sparc*)
3455         arch="sparc"
3456     ;;
3457     tilegx|tile-gx)
3458         arch="tilegx"
3459     ;;
3460     i[3-6]86|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3461         arch="x86"
3462     ;;
3463 esac
3464
3465 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3466 enable $arch
3467
3468 # Add processor-specific flags
3469 if enabled aarch64; then
3470
3471     case $cpu in
3472         armv*)
3473             cpuflags="-march=$cpu"
3474         ;;
3475         *)
3476             cpuflags="-mcpu=$cpu"
3477         ;;
3478     esac
3479
3480 elif enabled alpha; then
3481
3482     cpuflags="-mcpu=$cpu"
3483
3484 elif enabled arm; then
3485
3486     check_arm_arch() {
3487         check_cpp_condition stddef.h \
3488             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3489             $cpuflags
3490     }
3491
3492     probe_arm_arch() {
3493         if   check_arm_arch 4;        then echo armv4;
3494         elif check_arm_arch 4T;       then echo armv4t;
3495         elif check_arm_arch 5;        then echo armv5;
3496         elif check_arm_arch 5E;       then echo armv5e;
3497         elif check_arm_arch 5T;       then echo armv5t;
3498         elif check_arm_arch 5TE;      then echo armv5te;
3499         elif check_arm_arch 5TEJ;     then echo armv5te;
3500         elif check_arm_arch 6;        then echo armv6;
3501         elif check_arm_arch 6J;       then echo armv6j;
3502         elif check_arm_arch 6K;       then echo armv6k;
3503         elif check_arm_arch 6Z;       then echo armv6z;
3504         elif check_arm_arch 6ZK;      then echo armv6zk;
3505         elif check_arm_arch 6T2;      then echo armv6t2;
3506         elif check_arm_arch 7;        then echo armv7;
3507         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3508         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3509         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3510         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3511         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3512         fi
3513     }
3514
3515     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3516
3517     case $cpu in
3518         armv*)
3519             cpuflags="-march=$cpu"
3520             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3521         ;;
3522         *)
3523             cpuflags="-mcpu=$cpu"
3524             case $cpu in
3525                 cortex-a*)                               subarch=armv7a  ;;
3526                 cortex-r*)                               subarch=armv7r  ;;
3527                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3528                 arm11*)                                  subarch=armv6   ;;
3529                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3530                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3531                 *)                             subarch=$(probe_arm_arch) ;;
3532             esac
3533         ;;
3534     esac
3535
3536     case "$subarch" in
3537         armv5t*)    enable fast_clz                ;;
3538         armv[6-8]*) enable fast_clz fast_unaligned ;;
3539     esac
3540
3541 elif enabled avr32; then
3542
3543     case $cpu in
3544         ap7[02]0[0-2])
3545             subarch="avr32_ap"
3546             cpuflags="-mpart=$cpu"
3547         ;;
3548         ap)
3549             subarch="avr32_ap"
3550             cpuflags="-march=$cpu"
3551         ;;
3552         uc3[ab]*)
3553             subarch="avr32_uc"
3554             cpuflags="-mcpu=$cpu"
3555         ;;
3556         uc)
3557             subarch="avr32_uc"
3558             cpuflags="-march=$cpu"
3559         ;;
3560     esac
3561
3562 elif enabled bfin; then
3563
3564     cpuflags="-mcpu=$cpu"
3565
3566 elif enabled mips; then
3567
3568     cpuflags="-march=$cpu"
3569
3570     case $cpu in
3571         24kc)
3572             disable mipsfpu
3573             disable mipsdspr1
3574             disable mipsdspr2
3575         ;;
3576         24kf*)
3577             disable mipsdspr1
3578             disable mipsdspr2
3579         ;;
3580         24kec|34kc|1004kc)
3581             disable mipsfpu
3582             disable mipsdspr2
3583         ;;
3584         24kef*|34kf*|1004kf*)
3585             disable mipsdspr2
3586         ;;
3587         74kc)
3588             disable mipsfpu
3589         ;;
3590     esac
3591
3592 elif enabled ppc; then
3593
3594     disable ldbrx
3595
3596     case $(tolower $cpu) in
3597         601|ppc601|powerpc601)
3598             cpuflags="-mcpu=601"
3599             disable altivec
3600         ;;
3601         603*|ppc603*|powerpc603*)
3602             cpuflags="-mcpu=603"
3603             disable altivec
3604         ;;
3605         604*|ppc604*|powerpc604*)
3606             cpuflags="-mcpu=604"
3607             disable altivec
3608         ;;
3609         g3|75*|ppc75*|powerpc75*)
3610             cpuflags="-mcpu=750"
3611             disable altivec
3612         ;;
3613         g4|745*|ppc745*|powerpc745*)
3614             cpuflags="-mcpu=7450"
3615         ;;
3616         74*|ppc74*|powerpc74*)
3617             cpuflags="-mcpu=7400"
3618         ;;
3619         g5|970|ppc970|powerpc970)
3620             cpuflags="-mcpu=970"
3621         ;;
3622         power[3-7]*)
3623             cpuflags="-mcpu=$cpu"
3624         ;;
3625         cell)
3626             cpuflags="-mcpu=cell"
3627             enable ldbrx
3628         ;;
3629         e500mc)
3630             cpuflags="-mcpu=e500mc"
3631             disable altivec
3632         ;;
3633         e500v2)
3634             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3635             disable altivec
3636         ;;
3637         e500)
3638             cpuflags="-mcpu=8540 -mhard-float"
3639             disable altivec
3640         ;;
3641     esac
3642
3643 elif enabled sparc; then
3644
3645     case $cpu in
3646         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3647             cpuflags="-mcpu=$cpu"
3648         ;;
3649         ultrasparc*|niagara[234])
3650             cpuflags="-mcpu=$cpu"
3651         ;;
3652     esac
3653
3654 elif enabled x86; then
3655
3656     case $cpu in
3657         i[345]86|pentium)
3658             cpuflags="-march=$cpu"
3659             disable mmx
3660         ;;
3661         # targets that do NOT support nopl and conditional mov (cmov)
3662         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3663             cpuflags="-march=$cpu"
3664             disable i686
3665         ;;
3666         # targets that do support nopl and conditional mov (cmov)
3667         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3668             cpuflags="-march=$cpu"
3669             enable i686
3670             enable fast_cmov
3671         ;;
3672         # targets that do support conditional mov but on which it's slow
3673         pentium4|pentium4m|prescott|nocona)
3674             cpuflags="-march=$cpu"
3675             enable i686
3676             disable fast_cmov
3677         ;;
3678     esac
3679
3680 fi
3681
3682 if [ "$cpu" != generic ]; then
3683     add_cflags  $cpuflags
3684     add_asflags $cpuflags
3685 fi
3686
3687 # compiler sanity check
3688 check_exec <<EOF
3689 int main(void){ return 0; }
3690 EOF
3691 if test "$?" != 0; then
3692     echo "$cc is unable to create an executable file."
3693     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3694         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3695         echo "Only do this if you know what cross compiling means."
3696     fi
3697     die "C compiler test failed."
3698 fi
3699
3700 add_cppflags -D_ISOC99_SOURCE
3701 add_cxxflags -D__STDC_CONSTANT_MACROS
3702 check_cflags -std=c99
3703 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3704 #include <stdlib.h>
3705 EOF
3706 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3707 #include <stdlib.h>
3708 EOF
3709
3710 add_host_cppflags -D_ISOC99_SOURCE
3711 check_host_cflags -std=c99
3712 check_host_cflags -Wall
3713 check_host_cflags -O3
3714
3715 check_64bit(){
3716     arch32=$1
3717     arch64=$2
3718     expr=$3
3719     check_code cc "" "int test[2*($expr) - 1]" &&
3720         subarch=$arch64 || subarch=$arch32
3721 }
3722
3723 case "$arch" in
3724     aarch64|alpha|ia64)
3725         spic=$shared
3726     ;;
3727     mips)
3728         check_64bit mips mips64 '_MIPS_SIM > 1'
3729         spic=$shared
3730     ;;
3731     parisc)
3732         check_64bit parisc parisc64 'sizeof(void *) > 4'
3733         spic=$shared
3734     ;;
3735     ppc)
3736         check_64bit ppc ppc64 'sizeof(void *) > 4'
3737         spic=$shared
3738     ;;
3739     s390)
3740         check_64bit s390 s390x 'sizeof(void *) > 4'
3741         spic=$shared
3742     ;;
3743     sparc)
3744         check_64bit sparc sparc64 'sizeof(void *) > 4'
3745         spic=$shared
3746     ;;
3747     x86)
3748         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3749         if test "$subarch" = "x86_64"; then
3750             spic=$shared
3751         fi
3752     ;;
3753     ppc)
3754         check_cc <<EOF && subarch="ppc64"
3755         int test[(int)sizeof(char*) - 7];
3756 EOF
3757     ;;
3758 esac
3759
3760 enable $subarch
3761 enabled spic && enable_weak pic
3762
3763 # OS specific
3764 case $target_os in
3765     aix)
3766         SHFLAGS=-shared
3767         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3768         enabled shared && add_ldflags -Wl,-brtl
3769         ;;
3770     haiku)
3771         prefix_default="/boot/common"
3772         network_extralibs="-lnetwork"
3773         host_libs=
3774         ;;
3775     sunos)
3776         SHFLAGS='-shared -Wl,-h,$$(@F)'
3777         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3778         network_extralibs="-lsocket -lnsl"
3779         # When using suncc to build, the Solaris linker will mark
3780         # an executable with each instruction set encountered by
3781         # the Solaris assembler.  As our libraries contain their own
3782         # guards for processor-specific code, instead suppress
3783         # generation of the HWCAPS ELF section on Solaris x86 only.
3784         enabled_all suncc x86 &&
3785             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3786             add_ldflags -Wl,-M,mapfile
3787         nm_default='nm -P -g'
3788         ;;
3789     netbsd)
3790         disable symver
3791         oss_indev_extralibs="-lossaudio"
3792         oss_outdev_extralibs="-lossaudio"
3793         enabled gcc || check_ldflags -Wl,-zmuldefs
3794         ;;
3795     openbsd|bitrig)
3796         disable symver
3797         SHFLAGS='-shared'
3798         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3799         SLIB_INSTALL_LINKS=
3800         oss_indev_extralibs="-lossaudio"
3801         oss_outdev_extralibs="-lossaudio"
3802         ;;
3803     dragonfly)
3804         disable symver
3805         ;;
3806     freebsd)
3807         ;;
3808     bsd/os)
3809         add_extralibs -lpoll -lgnugetopt
3810         strip="strip -d"
3811         ;;
3812     darwin)
3813         gas="gas-preprocessor.pl $cc"
3814         enabled ppc && add_asflags -force_cpusubtype_ALL
3815         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3816         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3817         strip="${strip} -x"
3818         add_ldflags -Wl,-dynamic,-search_paths_first
3819         SLIBSUF=".dylib"
3820         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3821         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3822         objformat="macho"
3823         enabled x86_64 && objformat="macho64"
3824         enabled_any pic shared ||
3825             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3826         ;;
3827     mingw32*)
3828         if test $target_os = "mingw32ce"; then
3829             disable network
3830         else
3831             target_os=mingw32
3832         fi
3833         LIBTARGET=i386
3834         if enabled x86_64; then
3835             LIBTARGET="i386:x86-64"
3836         elif enabled arm; then
3837             LIBTARGET=arm-wince
3838         fi
3839         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3840         check_ldflags -Wl,--nxcompat
3841         check_ldflags -Wl,--dynamicbase
3842         shlibdir_default="$bindir_default"
3843         SLIBPREF=""
3844         SLIBSUF=".dll"
3845         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3846         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3847         dlltool="${cross_prefix}dlltool"
3848         if check_cmd lib.exe -list; then
3849             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3850             if enabled x86_64; then
3851                 LIBTARGET=x64
3852             fi
3853         elif check_cmd $dlltool --version; then
3854             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3855         fi
3856         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3857         SLIB_INSTALL_LINKS=
3858         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3859         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3860         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3861         objformat="win32"
3862         ranlib=:
3863         enable dos_paths
3864         ;;
3865     win32|win64)
3866         disable symver
3867         if enabled shared; then
3868             # Link to the import library instead of the normal static library
3869             # for shared libs.
3870             LD_LIB='%.lib'
3871             # Cannot build both shared and static libs with MSVC or icl.
3872             disable static
3873         fi
3874         shlibdir_default="$bindir_default"
3875         SLIBPREF=""
3876         SLIBSUF=".dll"
3877         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3878         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3879         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3880         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3881         SLIB_INSTALL_LINKS=
3882         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3883         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3884         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3885         objformat="win32"
3886         ranlib=:
3887         enable dos_paths
3888         ;;
3889     cygwin*)
3890         target_os=cygwin
3891         shlibdir_default="$bindir_default"
3892         SLIBPREF="cyg"
3893         SLIBSUF=".dll"
3894         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3895         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3896         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3897         SLIB_INSTALL_LINKS=
3898         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3899         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3900         objformat="win32"
3901         enable dos_paths
3902         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3903         ;;
3904     *-dos|freedos|opendos)
3905         network_extralibs="-lsocket"
3906         objformat="coff"
3907         enable dos_paths
3908         add_cppflags -U__STRICT_ANSI__
3909         ;;
3910     linux)
3911         enable dv1394
3912         ;;
3913     irix*)
3914         target_os=irix
3915         ranlib="echo ignoring ranlib"
3916         ;;
3917     os/2*)
3918         strip="lxlite -CS"
3919         ln_s="cp -f"
3920         objformat="aout"
3921         add_cppflags -D_GNU_SOURCE
3922         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3923         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3924         LIBSUF="_s.a"
3925         SLIBPREF=""
3926         SLIBSUF=".dll"
3927         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3928         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3929         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3930             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3931             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3932             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3933             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3934             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3935         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3936             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3937         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3938         enable dos_paths
3939         enable_weak os2threads
3940         ;;
3941     gnu/kfreebsd)
3942         add_cppflags -D_BSD_SOURCE
3943         ;;
3944     gnu)
3945         ;;
3946     qnx)
3947         add_cppflags -D_QNX_SOURCE
3948         network_extralibs="-lsocket"
3949         ;;
3950     symbian)
3951         SLIBSUF=".dll"
3952         enable dos_paths
3953         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3954         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3955         add_ldflags -Wl,--target1-abs,--no-undefined \
3956                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3957                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3958         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3959                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3960                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3961         ;;
3962     osf1)
3963         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3964         ;;
3965     minix)
3966         ;;
3967     plan9)
3968         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3969                      -D_REENTRANT_SOURCE        \
3970                      -D_RESEARCH_SOURCE         \
3971                      -DFD_SETSIZE=96            \
3972                      -DHAVE_SOCK_OPTS
3973         add_compat strtod.o strtod=avpriv_strtod
3974         network_extralibs='-lbsd'
3975         exeobjs=compat/plan9/main.o
3976         disable ffserver
3977         cp_f='cp'
3978         ;;
3979     none)
3980         ;;
3981     *)
3982         die "Unknown OS '$target_os'."
3983         ;;
3984 esac
3985
3986 # determine libc flavour
3987
3988 probe_libc(){
3989     pfx=$1
3990     pfx_no_=${pfx%_}
3991     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3992     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3993         eval ${pfx}libc_type=uclibc
3994         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3995     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3996         eval ${pfx}libc_type=glibc
3997         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3998     # MinGW headers can be installed on Cygwin, so check for newlib first.
3999     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4000         eval ${pfx}libc_type=newlib
4001         add_${pfx}cppflags -U__STRICT_ANSI__
4002     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4003     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4004         eval ${pfx}libc_type=mingw64
4005         if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
4006             add_compat msvcrt/snprintf.o
4007             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
4008         fi
4009         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4010         eval test \$${pfx_no_}cc_type = "gcc" &&
4011             add_${pfx}cppflags -D__printf__=__gnu_printf__
4012     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4013          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4014         eval ${pfx}libc_type=mingw32
4015         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4016             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4017             die "ERROR: MinGW32 runtime version must be >= 3.15."
4018         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4019         eval test \$${pfx_no_}cc_type = "gcc" &&
4020             add_${pfx}cppflags -D__printf__=__gnu_printf__
4021     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4022         eval ${pfx}libc_type=msvcrt
4023         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4024         # 0x601 by default unless something else is set by the user.
4025         # This can easily lead to us detecting functions only present
4026         # in such new versions and producing binaries requiring windows 7.0.
4027         # Therefore explicitly set the default to XP unless the user has
4028         # set something else on the command line.
4029         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4030             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4031     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4032         eval ${pfx}libc_type=klibc
4033     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4034         eval ${pfx}libc_type=bionic
4035     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4036         eval ${pfx}libc_type=solaris
4037         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4038     fi
4039 }
4040
4041 probe_libc
4042 test -n "$libc_type" && enable libc_$libc_type
4043 probe_libc host_
4044 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4045
4046 case $libc_type in
4047     bionic)
4048         add_compat strtod.o strtod=avpriv_strtod
4049         ;;
4050     msvcrt)
4051         add_compat strtod.o strtod=avpriv_strtod
4052         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4053                                      _snprintf=avpriv_snprintf  \
4054                                      vsnprintf=avpriv_vsnprintf
4055         ;;
4056 esac
4057
4058 # hacks for compiler/libc/os combinations
4059
4060 if enabled_all tms470 libc_glibc; then
4061     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4062     add_cppflags -D__USER_LABEL_PREFIX__=
4063     add_cppflags -D__builtin_memset=memset
4064     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4065     add_cflags   -pds=48    # incompatible redefinition of macro
4066 fi
4067
4068 if enabled_all ccc libc_glibc; then
4069     add_ldflags -Wl,-z,now  # calls to libots crash without this
4070 fi
4071
4072 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4073     add_cppflags '-I\$(SRC_PATH)/compat/float'
4074
4075 esc(){
4076     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4077 }
4078
4079 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
4080
4081 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4082
4083 set_default $PATHS_LIST
4084 set_default nm
4085
4086 # we need to build at least one lib type
4087 if ! enabled_any static shared; then
4088     cat <<EOF
4089 At least one library type must be built.
4090 Specify --enable-static to build the static libraries or --enable-shared to
4091 build the shared libraries as well. To only build the shared libraries specify
4092 --disable-static in addition to --enable-shared.
4093 EOF
4094     exit 1;
4095 fi
4096
4097 # backward compatibility layer for incompatible_libav/fork_abi
4098 enabled incompatible_fork_abi  && enable incompatible_libav_abi
4099 enabled incompatible_libav_abi && enable incompatible_fork_abi
4100
4101 die_license_disabled() {
4102     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4103 }
4104
4105 die_license_disabled_gpl() {
4106     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
4107 }
4108
4109 die_license_disabled gpl frei0r
4110 die_license_disabled gpl libcdio
4111 die_license_disabled gpl libutvideo
4112 die_license_disabled gpl libvidstab
4113 die_license_disabled gpl libx264
4114 die_license_disabled gpl libx265
4115 die_license_disabled gpl libxavs
4116 die_license_disabled gpl libxvid
4117 die_license_disabled gpl libzvbi
4118 die_license_disabled gpl x11grab
4119
4120 die_license_disabled nonfree libaacplus
4121 die_license_disabled nonfree libfaac
4122 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
4123 enabled gpl && die_license_disabled_gpl nonfree openssl
4124
4125 die_license_disabled version3 libopencore_amrnb
4126 die_license_disabled version3 libopencore_amrwb
4127 die_license_disabled version3 libvo_aacenc
4128 die_license_disabled version3 libvo_amrwbenc
4129
4130 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4131
4132 disabled optimizations || check_cflags -fomit-frame-pointer
4133
4134 enable_weak_pic() {
4135     disabled pic && return
4136     enable pic
4137     add_cppflags -DPIC
4138     case "$target_os" in
4139     mingw*|cygwin*)
4140         ;;
4141     *)
4142         add_cflags -fPIC
4143         ;;
4144     esac
4145     add_asflags  -fPIC
4146 }
4147
4148 enabled pic && enable_weak_pic
4149
4150 check_cc <<EOF || die "Symbol mangling check failed."
4151 int ff_extern;
4152 EOF
4153 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4154 extern_prefix=${sym%%ff_extern*}
4155
4156 check_cc <<EOF && enable_weak inline_asm
4157 void foo(void) { __asm__ volatile ("" ::); }
4158 EOF
4159
4160 _restrict=
4161 for restrict_keyword in restrict __restrict__ __restrict; do
4162     check_cc <<EOF && _restrict=$restrict_keyword && break
4163 void foo(char * $restrict_keyword p);
4164 EOF
4165 done
4166
4167 check_cc <<EOF && enable pragma_deprecated
4168 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4169 EOF
4170
4171 check_cc <<EOF && enable attribute_packed
4172 struct { int x; } __attribute__((packed)) x;
4173 EOF
4174
4175 check_cc <<EOF && enable attribute_may_alias
4176 union { int x; } __attribute__((may_alias)) x;
4177 EOF
4178
4179 check_cc <<EOF || die "endian test failed"
4180 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4181 EOF
4182 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4183
4184 check_inline_asm inline_asm_labels '"1:\n"'
4185
4186 check_inline_asm inline_asm_nonlocal_labels '"Label:\n"'
4187
4188 if enabled aarch64; then
4189     # internal assembler in clang 3.3 does not support this instruction
4190     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4191     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4192
4193     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4194
4195 elif enabled alpha; then
4196
4197     check_cflags -mieee
4198
4199 elif enabled arm; then
4200
4201     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
4202 float func(float a, float b){ return a+b; }
4203 EOF
4204
4205     enabled thumb && check_cflags -mthumb || check_cflags -marm
4206     nogas=die
4207
4208     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4209         enable vfp_args
4210     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
4211         case "${cross_prefix:-$cc}" in
4212             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4213             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4214 __asm__ (".eabi_attribute 28, 1");
4215 int main(void) { return 0; }
4216 EOF
4217         esac
4218         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4219     fi
4220
4221     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4222     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4223     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4224     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4225     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4226     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4227
4228     [ $target_os = linux ] ||
4229         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4230             $ARCH_EXT_LIST_ARM
4231
4232     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4233
4234     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4235
4236 elif enabled mips; then
4237
4238     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4239     enabled mips32r2  && add_cflags "-mips32r2" && add_asflags "-mips32r2" &&
4240      check_inline_asm mips32r2  '"rotr $t0, $t1, 1"'
4241     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
4242      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
4243     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
4244      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
4245     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
4246      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
4247
4248 elif enabled parisc; then
4249
4250     if enabled gcc; then
4251         case $($cc -dumpversion) in
4252             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4253         esac
4254     fi
4255
4256 elif enabled ppc; then
4257
4258     enable local_aligned_8 local_aligned_16
4259
4260     [ $cpu != e500 -a $cpu != e500v2 ] &&
4261      check_inline_asm dcbzl    '"dcbzl 0, %0" :: "r"(0)'
4262     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4263     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4264     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4265
4266     # AltiVec flags: The FSF version of GCC differs from the Apple version
4267     if enabled altivec; then
4268         if ! enabled_any pic ppc64; then
4269             nogas=warn
4270         fi
4271         check_cflags -maltivec -mabi=altivec &&
4272         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4273         check_cflags -faltivec
4274
4275         # check if our compiler supports Motorola AltiVec C API
4276         check_cc <<EOF || disable altivec
4277 $inc_altivec_h
4278 int main(void) {
4279     vector signed int v1 = (vector signed int) { 0 };
4280     vector signed int v2 = (vector signed int) { 1 };
4281     v1 = vec_add(v1, v2);
4282     return 0;
4283 }
4284 EOF
4285
4286         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4287     fi
4288
4289 elif enabled x86; then
4290
4291     check_builtin rdtsc    intrin.h   "__rdtsc()"
4292     check_builtin mm_empty mmintrin.h "_mm_empty()"
4293
4294     enable local_aligned_8 local_aligned_16
4295
4296     # check whether EBP is available on x86
4297     # As 'i' is stored on the stack, this program will crash
4298     # if the base pointer is used to access it because the
4299     # base pointer is cleared in the inline assembly code.
4300     check_exec_crash <<EOF && enable ebp_available
4301 volatile int i=0;
4302 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4303 return i;
4304 EOF
4305
4306     # check whether EBX is available on x86
4307     check_inline_asm ebx_available '""::"b"(0)' &&
4308         check_inline_asm ebx_available '"":::"%ebx"'
4309
4310     # check whether xmm clobbers are supported
4311     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4312
4313     check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test, %eax"' ||
4314         check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test(%rip), %eax"'
4315
4316     # check whether binutils is new enough to compile SSSE3/MMXEXT
4317     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4318     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4319
4320     if ! disabled_any asm mmx yasm; then
4321         if check_cmd $yasmexe --version; then
4322             enabled x86_64 && yasm_extra="-m amd64"
4323             yasm_debug="-g dwarf2"
4324         elif check_cmd nasm -v; then
4325             yasmexe=nasm
4326             yasm_debug="-g -F dwarf"
4327             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4328         fi
4329
4330         YASMFLAGS="-f $objformat $yasm_extra"
4331         enabled pic               && append YASMFLAGS "-DPIC"
4332         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4333         case "$objformat" in
4334             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4335         esac
4336
4337         check_yasm "movbe ecx, [5]" && enable yasm ||
4338             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4339         check_yasm "vextractf128 xmm0, ymm0, 0"      || disable avx_external avresample
4340         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4341         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4342         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4343         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4344         check_yasm "CPU amdnop" || disable cpunop
4345     fi
4346
4347     case "$cpu" in
4348         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4349             disable fast_clz
4350         ;;
4351     esac
4352
4353 fi
4354
4355 if enabled asm; then
4356     as=${gas:=$as}
4357     check_as <<EOF && enable gnu_as || \
4358         $nogas "GNU assembler not found, install gas-preprocessor"
4359 .macro m n
4360 \n: .int 0
4361 .endm
4362 m x
4363 EOF
4364 fi
4365
4366 check_ldflags -Wl,--as-needed
4367
4368 if check_func dlopen; then
4369     ldl=
4370 elif check_func dlopen -ldl; then
4371     ldl=-ldl
4372 fi
4373
4374 if ! disabled network; then
4375     check_func getaddrinfo $network_extralibs
4376     check_func getservbyport $network_extralibs
4377     check_func inet_aton $network_extralibs
4378
4379     check_type netdb.h "struct addrinfo"
4380     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4381     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4382     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4383     check_type poll.h "struct pollfd"
4384     check_type netinet/sctp.h "struct sctp_event_subscribe"
4385     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4386     check_type netinet/in.h "struct sockaddr_in6"
4387     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4388     check_type "sys/types.h sys/socket.h" socklen_t
4389
4390     # Prefer arpa/inet.h over winsock2
4391     if check_header arpa/inet.h ; then
4392         check_func closesocket
4393     elif check_header winsock2.h ; then
4394         check_func_headers winsock2.h closesocket -lws2 &&
4395             network_extralibs="-lws2" ||
4396         { check_func_headers winsock2.h closesocket -lws2_32 &&
4397             network_extralibs="-lws2_32"; } || disable winsock2_h network
4398         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4399
4400         check_type ws2tcpip.h socklen_t
4401         check_type ws2tcpip.h "struct addrinfo"
4402         check_type ws2tcpip.h "struct group_source_req"
4403         check_type ws2tcpip.h "struct ip_mreq_source"
4404         check_type ws2tcpip.h "struct ipv6_mreq"
4405         check_type winsock2.h "struct pollfd"
4406         check_struct winsock2.h "struct sockaddr" sa_len
4407         check_type ws2tcpip.h "struct sockaddr_in6"
4408         check_type ws2tcpip.h "struct sockaddr_storage"
4409     else
4410         disable network
4411     fi
4412 fi
4413
4414 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4415 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4416 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4417 check_builtin sarestart signal.h "SA_RESTART"
4418 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4419
4420 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4421 check_func  ${malloc_prefix}memalign            && enable memalign
4422 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4423
4424 check_func  access
4425 check_func  clock_gettime || { check_func clock_gettime -lrt && add_extralibs -lrt; }
4426 check_func  fcntl
4427 check_func  fork
4428 check_func  gethrtime
4429 check_func  getopt
4430 check_func  getrusage
4431 check_func  gettimeofday
4432 check_func  isatty
4433 check_func  localtime_r
4434 check_func  mach_absolute_time
4435 check_func  mkstemp
4436 check_func  mmap
4437 check_func  mprotect
4438 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4439 check_func  nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
4440 check_func  sched_getaffinity
4441 check_func  setrlimit
4442 check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE
4443 check_func  strerror_r
4444 check_func  sysconf
4445 check_func  sysctl
4446 check_func  usleep
4447
4448 check_func_headers conio.h kbhit
4449 check_func_headers io.h setmode
4450 check_func_headers lzo/lzo1x.h lzo1x_999_compress
4451 check_func_headers stdlib.h getenv
4452
4453 check_func_headers windows.h GetProcessAffinityMask
4454 check_func_headers windows.h GetProcessTimes
4455 check_func_headers windows.h GetSystemTimeAsFileTime
4456 check_func_headers windows.h MapViewOfFile
4457 check_func_headers windows.h PeekNamedPipe
4458 check_func_headers windows.h SetConsoleTextAttribute
4459 check_func_headers windows.h Sleep
4460 check_func_headers windows.h VirtualAlloc
4461 check_func_headers glob.h glob
4462 enabled xlib &&
4463     check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
4464
4465 check_header cl/cl.h
4466 check_header direct.h
4467 check_header dlfcn.h
4468 check_header dxva.h
4469 check_header dxva2api.h -D_WIN32_WINNT=0x0600
4470 check_header io.h
4471 check_header libcrystalhd/libcrystalhd_if.h
4472 check_header mach/mach_time.h
4473 check_header malloc.h
4474 check_header poll.h
4475 check_header sys/mman.h
4476 check_header sys/param.h
4477 check_header sys/resource.h
4478 check_header sys/select.h
4479 check_header sys/time.h
4480 check_header sys/un.h
4481 check_header termios.h
4482 check_header unistd.h
4483 check_header vdpau/vdpau.h
4484 check_header vdpau/vdpau_x11.h
4485 check_header VideoDecodeAcceleration/VDADecoder.h
4486 check_header windows.h
4487 check_header X11/extensions/XvMClib.h
4488 check_header asm/types.h
4489
4490 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4491 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4492 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4493
4494 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4495
4496 if ! disabled w32threads && ! enabled pthreads; then
4497     check_func_headers "windows.h process.h" _beginthreadex &&
4498         enable w32threads || disable w32threads
4499 fi
4500
4501 # check for some common methods of building with pthread support
4502 # do this before the optional library checks as some of them require pthreads
4503 if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
4504     enable pthreads
4505     if check_func pthread_join -pthread && check_func pthread_create -pthread; then
4506         add_cflags -pthread
4507         add_extralibs -pthread
4508     elif check_func pthread_join -pthreads && check_func pthread_create -pthreads; then
4509         add_cflags -pthreads
4510         add_extralibs -pthreads
4511     elif check_func pthread_join -lpthreadGC2 && check_func pthread_create -lpthreadGC2; then
4512         add_extralibs -lpthreadGC2
4513     elif check_lib pthread.h pthread_join -lpthread && check_lib pthread.h pthread_create -lpthread; then
4514         :
4515     elif ! check_func pthread_join && ! check_func pthread_create; then
4516         disable pthreads
4517     fi
4518     check_code cc "pthread.h" "static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER" || disable pthreads
4519 fi
4520
4521
4522 if enabled pthreads; then
4523   check_func pthread_cancel
4524 fi
4525
4526 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4527 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4528
4529 check_lib math.h sin -lm && LIBM="-lm"
4530 disabled crystalhd || check_lib libcrystalhd/libcrystalhd_if.h DtsCrystalHDVersion -lcrystalhd || disable crystalhd
4531
4532 atan2f_args=2
4533 ldexpf_args=2
4534 powf_args=2
4535
4536 for func in $MATH_FUNCS; do
4537     eval check_mathfunc $func \${${func}_args:-1}
4538 done
4539
4540 # these are off by default, so fail if requested and not available
4541 enabled avisynth          && { { check_lib2 "windows.h" LoadLibrary; } ||
4542                                { check_lib2 "dlfcn.h" dlopen -ldl; } ||
4543                                die "ERROR: LoadLibrary/dlopen not found for avisynth"; }
4544 enabled decklink          && { check_header DeckLinkAPI.h || die "ERROR: DeckLinkAPI.h header not found"; }
4545 enabled fontconfig        && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4546 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4547 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4548 enabled ladspa            && { check_header ladspa.h || die "ERROR: ladspa.h header not found"; }
4549 enabled libiec61883       && require libiec61883 libiec61883/iec61883.h iec61883_cmp_connect -lraw1394 -lavc1394 -lrom1394 -liec61883
4550 enabled libaacplus        && require "libaacplus >= 2.0.0" aacplus.h aacplusEncOpen -laacplus
4551 enabled libass            && require_pkg_config libass ass/ass.h ass_library_init
4552 enabled libbluray         && require_pkg_config libbluray libbluray/bluray.h bd_open
4553 enabled libcelt           && require libcelt celt/celt.h celt_decode -lcelt0 &&
4554                              { check_lib celt/celt.h celt_decoder_create_custom -lcelt0 ||
4555                                die "ERROR: libcelt must be installed and version must be >= 0.11.0."; }
4556 enabled libcaca           && require_pkg_config caca caca.h caca_create_canvas
4557 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4558 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
4559 flite_libs="-lflite_cmu_time_awb -lflite_cmu_us_awb -lflite_cmu_us_kal -lflite_cmu_us_kal16 -lflite_cmu_us_rms -lflite_cmu_us_slt -lflite_usenglish -lflite_cmulex -lflite"
4560 enabled libflite          && require2 libflite "flite/flite.h" flite_init $flite_libs
4561 enabled libfreetype       && require_libfreetype
4562 enabled libgme            && require  libgme gme/gme.h gme_new_emu -lgme -lstdc++
4563 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4564                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4565                                done || die "ERROR: libgsm not found"; }
4566 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4567 enabled libmodplug        && require libmodplug libmodplug/modplug.h ModPlug_Load -lmodplug
4568 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4569 enabled libnut            && require libnut libnut.h nut_demuxer_init -lnut
4570 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4571 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4572 enabled libopencv         && require_pkg_config opencv opencv/cxcore.h cvCreateImageHeader
4573 enabled libopenjpeg       && { check_lib openjpeg-1.5/openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4574                                check_lib openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4575                                die "ERROR: libopenjpeg not found"; }
4576 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4577 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4578 enabled libquvi           && require_pkg_config libquvi quvi/quvi.h quvi_init
4579 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4580 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4581 enabled libshine          && require_pkg_config shine shine/layer3.h shine_encode_buffer
4582 enabled libsoxr           && require libsoxr soxr.h soxr_create -lsoxr
4583 enabled libssh            && require_pkg_config libssh libssh/sftp.h sftp_init
4584 enabled libspeex          && require libspeex speex/speex.h speex_decoder_init -lspeex
4585 enabled libstagefright_h264 && require_cpp libstagefright_h264 "binder/ProcessState.h media/stagefright/MetaData.h
4586     media/stagefright/MediaBufferGroup.h media/stagefright/MediaDebug.h media/stagefright/MediaDefs.h
4587     media/stagefright/OMXClient.h media/stagefright/OMXCodec.h" android::OMXClient -lstagefright -lmedia -lutils -lbinder -lgnustl_static
4588 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4589 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame &&
4590                              { check_lib twolame.h twolame_encode_buffer_float32_interleaved -ltwolame ||
4591                                die "ERROR: libtwolame must be installed and version must be >= 0.3.10"; }
4592 enabled libutvideo        && require_cpp utvideo "stdint.h stdlib.h utvideo/utvideo.h utvideo/Codec.h" 'CCodec*' -lutvideo -lstdc++
4593 enabled libv4l2           && require_pkg_config libv4l2 libv4l2.h v4l2_ioctl
4594 enabled libvidstab        && require_pkg_config "vidstab >= 0.98" vid.stab/libvidstab.h vsMotionDetectInit
4595 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4596 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4597 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4598 enabled libvpx            && {
4599     enabled libvpx_vp8_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
4600                                     die "ERROR: libvpx decoder version must be >=0.9.1"; }
4601     enabled libvpx_vp8_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_enc_init_ver VP8E_SET_MAX_INTRA_BITRATE_PCT" -lvpx ||
4602                                     die "ERROR: libvpx encoder version must be >=0.9.7"; }
4603     enabled libvpx_vp9_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx" -lvpx || disable libvpx_vp9_decoder; }
4604     enabled libvpx_vp9_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_vp9_cx VP9E_SET_SVC" -lvpx || disable libvpx_vp9_encoder; } }
4605 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4606 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4607 enabled libx264           && require libx264 x264.h x264_encoder_encode -lx264 &&
4608                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4609                                die "ERROR: libx264 must be installed and version must be >= 0.118."; }
4610 enabled libx265           && require_pkg_config x265 x265.h x265_encoder_encode &&
4611                              { check_cpp_condition x265.h "X265_BUILD >= 9" ||
4612                                die "ERROR: libx265 version must be >= 9."; }
4613 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4614 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4615 enabled libzmq            && require_pkg_config libzmq zmq.h zmq_ctx_new
4616 enabled libzvbi           && require libzvbi libzvbi.h vbi_decoder_new -lzvbi
4617 enabled openal            && { { for al_libs in "${OPENAL_LIBS}" "-lopenal" "-lOpenAL32"; do
4618                                check_lib 'AL/al.h' alGetError "${al_libs}" && break; done } ||
4619                                die "ERROR: openal not found"; } &&
4620                              { check_cpp_condition "AL/al.h" "defined(AL_VERSION_1_1)" ||
4621                                die "ERROR: openal must be installed and version must be 1.1 or compatible"; }
4622 enabled opencl            && { check_lib2 OpenCL/cl.h clEnqueueNDRangeKernel -Wl,-framework,OpenCL ||
4623                                check_lib2 CL/cl.h clEnqueueNDRangeKernel -lOpenCL ||
4624                                die "ERROR: opencl not found"; } &&
4625                              { ! enabled_any w32threads os2threads ||
4626                                die "opencl currently needs --enable-pthreads or --disable-w32threads"; } &&
4627                              { check_cpp_condition "OpenCL/cl.h" "defined(CL_VERSION_1_2)" ||
4628                                check_cpp_condition "CL/cl.h" "defined(CL_VERSION_1_2)" ||
4629                                die "ERROR: opencl must be installed and version must be 1.2 or compatible"; }
4630 enabled opengl            && { check_lib GL/glx.h glXGetProcAddress "-lGL" ||
4631                                check_lib2 windows.h wglGetProcAddress "-lopengl32 -lgdi32" ||
4632                                check_lib2 OpenGL/gl3.h glGetError "-Wl,-framework,OpenGL" ||
4633                                check_lib2 ES2/gl.h glGetError "-isysroot=${sysroot} -Wl,-framework,OpenGLES" ||
4634                                die "ERROR: opengl not found."
4635                              }
4636 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4637                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4638                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4639                                die "ERROR: openssl not found"; }
4640
4641 if enabled gnutls; then
4642     { check_lib nettle/bignum.h nettle_mpz_get_str_256 -lnettle -lhogweed -lgmp && enable nettle; } ||
4643     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4644 fi
4645
4646 # libdc1394 check
4647 if enabled libdc1394; then
4648     { check_lib dc1394/dc1394.h dc1394_new -ldc1394 -lraw1394 &&
4649         enable libdc1394_2; } ||
4650     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4651         enable libdc1394_1; } ||
4652     die "ERROR: No version of libdc1394 found "
4653 fi
4654
4655 SDL_CONFIG="${cross_prefix}sdl-config"
4656 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4657     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4658     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4659     enable sdl
4660 else
4661   if "${SDL_CONFIG}" --version > /dev/null 2>&1; then
4662     sdl_cflags=$("${SDL_CONFIG}" --cflags)
4663     sdl_libs=$("${SDL_CONFIG}" --libs)
4664     check_func_headers SDL_version.h SDL_Linked_Version $sdl_cflags $sdl_libs &&
4665     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4666     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4667     enable sdl
4668   fi
4669 fi
4670 enabled sdl && add_cflags $sdl_cflags && add_extralibs $sdl_libs
4671
4672 texi2html --help 2> /dev/null | grep -q 'init-file' && enable texi2html || disable texi2html
4673 makeinfo --version > /dev/null 2>&1 && enable makeinfo  || disable makeinfo
4674 perl -v            > /dev/null 2>&1 && enable perl      || disable perl
4675 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4676 rsync --help 2> /dev/null | grep -q 'contimeout' && enable rsync_contimeout || disable rsync_contimeout
4677
4678 check_header linux/fb.h
4679 check_header linux/videodev.h
4680 check_header linux/videodev2.h
4681 check_code cc linux/videodev2.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_safe struct_v4l2_frmivalenum_discrete
4682
4683 check_header sys/videoio.h
4684
4685 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4686 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4687 # w32api 3.12 had it defined wrong
4688 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4689
4690 check_type "dshow.h" IBaseFilter
4691
4692 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4693 { check_header dev/bktr/ioctl_meteor.h &&
4694   check_header dev/bktr/ioctl_bt848.h; } ||
4695 { check_header machine/ioctl_meteor.h &&
4696   check_header machine/ioctl_bt848.h; } ||
4697 { check_header dev/video/meteor/ioctl_meteor.h &&
4698   check_header dev/video/bktr/ioctl_bt848.h; } ||
4699 check_header dev/ic/bt8xx.h
4700
4701 check_header sndio.h
4702 if check_struct sys/soundcard.h audio_buf_info bytes; then
4703     enable_safe sys/soundcard.h
4704 else
4705     check_cc -D__BSD_VISIBLE -D__XSI_VISIBLE <<EOF && add_cppflags -D__BSD_VISIBLE -D__XSI_VISIBLE && enable_safe sys/soundcard.h
4706     #include <sys/soundcard.h>
4707     audio_buf_info abc;
4708 EOF
4709 fi
4710 check_header soundcard.h
4711
4712 enabled_any alsa_indev alsa_outdev &&
4713     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4714
4715 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack && check_func sem_timedwait &&
4716     check_func jack_port_get_latency_range -ljack
4717
4718 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4719
4720 if enabled libcdio; then
4721     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4722     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4723     die "ERROR: libcdio-paranoia not found"
4724 fi
4725
4726 enabled xlib &&
4727     check_lib X11/Xlib.h XOpenDisplay -lX11 || disable xlib
4728
4729 enabled x11grab                                           &&
4730 require Xext X11/extensions/XShm.h XShmCreateImage -lXext &&
4731 require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes &&
4732 { enabled xlib || die "ERROR: Xlib not found"; }
4733
4734 enabled vaapi &&
4735     check_lib va/va.h vaInitialize -lva ||
4736     disable vaapi
4737
4738 enabled vdpau &&
4739     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4740     disable vdpau
4741
4742 enabled vdpau && enabled xlib &&
4743     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4744     prepend ffmpeg_libs $($ldflags_filter "-lvdpau") &&
4745     enable vdpau_x11
4746
4747 # Funny iconv installations are not unusual, so check it after all flags have been set
4748 disabled iconv || check_func_headers iconv.h iconv || check_lib2 iconv.h iconv -liconv || disable iconv
4749
4750 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4751
4752 # add some useful compiler flags if supported
4753 check_cflags -Wdeclaration-after-statement
4754 check_cflags -Wall
4755 check_cflags -Wdisabled-optimization
4756 check_cflags -Wpointer-arith
4757 check_cflags -Wredundant-decls
4758 check_cflags -Wwrite-strings
4759 check_cflags -Wtype-limits
4760 check_cflags -Wundef
4761 check_cflags -Wmissing-prototypes
4762 check_cflags -Wno-pointer-to-int-cast
4763 check_cflags -Wstrict-prototypes
4764 enabled extra_warnings && check_cflags -Winline
4765
4766 check_disable_warning(){
4767     warning_flag=-W${1#-Wno-}
4768     test_cflags $warning_flag && add_cflags $1
4769 }
4770
4771 check_disable_warning -Wno-parentheses
4772 check_disable_warning -Wno-switch
4773 check_disable_warning -Wno-format-zero-l