Merge commit '67afcefb35932b420998f6f3fda46c7c85848a3f'
[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-raise-major     increase major version numbers in sonames [no]
110
111 Program options:
112   --disable-programs       do not build command line programs
113   --disable-ffmpeg         disable ffmpeg build
114   --disable-ffplay         disable ffplay build
115   --disable-ffprobe        disable ffprobe build
116   --disable-ffserver       disable ffserver build
117
118 Documentation options:
119   --disable-doc            do not build documentation
120   --disable-htmlpages      do not build HTML documentation pages
121   --disable-manpages       do not build man documentation pages
122   --disable-podpages       do not build POD documentation pages
123   --disable-txtpages       do not build text documentation pages
124
125 Component options:
126   --disable-avdevice       disable libavdevice build
127   --disable-avcodec        disable libavcodec build
128   --disable-avformat       disable libavformat build
129   --disable-avutil         disable libavutil build
130   --disable-swresample     disable libswresample build
131   --disable-swscale        disable libswscale build
132   --disable-postproc       disable libpostproc build
133   --disable-avfilter       disable libavfilter build
134   --enable-avresample      enable libavresample build [no]
135   --disable-pthreads       disable pthreads [auto]
136   --disable-w32threads     disable Win32 threads [auto]
137   --disable-os2threads     disable OS/2 threads [auto]
138   --disable-network        disable network support [no]
139   --disable-dct            disable DCT code
140   --disable-dwt            disable DWT code
141   --disable-error-resilience disable error resilience code
142   --disable-lsp            disable LSP code
143   --disable-lzo            disable LZO decoder code
144   --disable-mdct           disable MDCT code
145   --disable-rdft           disable RDFT code
146   --disable-fft            disable FFT code
147
148 Hardware accelerators:
149   --disable-dxva2          disable DXVA2 code [autodetect]
150   --disable-vaapi          disable VAAPI code [autodetect]
151   --disable-vda            disable VDA code [autodetect]
152   --disable-vdpau          disable VDPAU code [autodetect]
153
154 Individual component options:
155   --disable-everything     disable all components listed below
156   --disable-encoder=NAME   disable encoder NAME
157   --enable-encoder=NAME    enable encoder NAME
158   --disable-encoders       disable all encoders
159   --disable-decoder=NAME   disable decoder NAME
160   --enable-decoder=NAME    enable decoder NAME
161   --disable-decoders       disable all decoders
162   --disable-hwaccel=NAME   disable hwaccel NAME
163   --enable-hwaccel=NAME    enable hwaccel NAME
164   --disable-hwaccels       disable all hwaccels
165   --disable-muxer=NAME     disable muxer NAME
166   --enable-muxer=NAME      enable muxer NAME
167   --disable-muxers         disable all muxers
168   --disable-demuxer=NAME   disable demuxer NAME
169   --enable-demuxer=NAME    enable demuxer NAME
170   --disable-demuxers       disable all demuxers
171   --enable-parser=NAME     enable parser NAME
172   --disable-parser=NAME    disable parser NAME
173   --disable-parsers        disable all parsers
174   --enable-bsf=NAME        enable bitstream filter NAME
175   --disable-bsf=NAME       disable bitstream filter NAME
176   --disable-bsfs           disable all bitstream filters
177   --enable-protocol=NAME   enable protocol NAME
178   --disable-protocol=NAME  disable protocol NAME
179   --disable-protocols      disable all protocols
180   --enable-indev=NAME      enable input device NAME
181   --disable-indev=NAME     disable input device NAME
182   --disable-indevs         disable input devices
183   --enable-outdev=NAME     enable output device NAME
184   --disable-outdev=NAME    disable output device NAME
185   --disable-outdevs        disable output devices
186   --disable-devices        disable all devices
187   --enable-filter=NAME     enable filter NAME
188   --disable-filter=NAME    disable filter NAME
189   --disable-filters        disable all filters
190
191 External library support:
192   --enable-avisynth        enable reading of AviSynth script files [no]
193   --disable-bzlib          disable bzlib [autodetect]
194   --enable-fontconfig      enable fontconfig
195   --enable-frei0r          enable frei0r video filtering
196   --enable-gnutls          enable gnutls [no]
197   --disable-iconv          disable iconv [autodetect]
198   --enable-ladspa          enable LADSPA audio filtering
199   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
200   --enable-libass          enable libass subtitles rendering [no]
201   --enable-libbluray       enable BluRay reading using libbluray [no]
202   --enable-libbs2b         enable bs2b DSP library [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   --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
290   --host-cc=HOSTCC         use host C compiler HOSTCC
291   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
292   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
293   --host-ld=HOSTLD         use host linker HOSTLD
294   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
295   --host-libs=HLIBS        use libs HLIBS when linking for host
296   --host-os=OS             compiler host OS [$target_os]
297   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
298   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
299   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
300   --extra-libs=ELIBS       add ELIBS [$ELIBS]
301   --extra-version=STRING   version string suffix []
302   --optflags=OPTFLAGS      override optimization-related compiler flags
303   --build-suffix=SUFFIX    library name suffix []
304   --enable-pic             build position-independent code
305   --enable-thumb           compile for Thumb instruction set
306   --enable-lto             use link-time optimization
307
308 Advanced options (experts only):
309   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
310   --disable-symver         disable symbol versioning
311   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
312   --disable-safe-bitstream-reader
313                            disable buffer boundary checking in bitreaders
314                            (faster, but may crash)
315   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
316   --enable-sram            allow use of on-chip SRAM
317
318 Optimization options (experts only):
319   --disable-asm            disable all assembler optimizations
320   --disable-altivec        disable AltiVec optimizations
321   --disable-amd3dnow       disable 3DNow! optimizations
322   --disable-amd3dnowext    disable 3DNow! extended optimizations
323   --disable-mmx            disable MMX optimizations
324   --disable-mmxext         disable MMXEXT optimizations
325   --disable-sse            disable SSE optimizations
326   --disable-sse2           disable SSE2 optimizations
327   --disable-sse3           disable SSE3 optimizations
328   --disable-ssse3          disable SSSE3 optimizations
329   --disable-sse4           disable SSE4 optimizations
330   --disable-sse42          disable SSE4.2 optimizations
331   --disable-avx            disable AVX optimizations
332   --disable-xop            disable XOP optimizations
333   --disable-fma3           disable FMA3 optimizations
334   --disable-fma4           disable FMA4 optimizations
335   --disable-avx2           disable AVX2 optimizations
336   --disable-armv5te        disable armv5te optimizations
337   --disable-armv6          disable armv6 optimizations
338   --disable-armv6t2        disable armv6t2 optimizations
339   --disable-vfp            disable VFP optimizations
340   --disable-neon           disable NEON optimizations
341   --disable-inline-asm     disable use of inline assembler
342   --disable-yasm           disable use of yasm assembler
343   --disable-mips32r2       disable MIPS32R2 optimizations
344   --disable-mipsdspr1      disable MIPS DSP ASE R1 optimizations
345   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
346   --disable-mipsfpu        disable floating point MIPS optimizations
347   --disable-fast-unaligned consider unaligned accesses slow
348
349 Developer options (useful when working on FFmpeg itself):
350   --disable-debug          disable debugging symbols
351   --enable-debug=LEVEL     set the debug level [$debuglevel]
352   --disable-optimizations  disable compiler optimizations
353   --enable-extra-warnings  enable more compiler warnings
354   --disable-stripping      disable stripping of executables and shared libraries
355   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
356                            2 causes a slowdown at runtime.
357   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
358   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
359                            leaks and errors, using the specified valgrind binary.
360                            Cannot be combined with --target-exec
361   --enable-ftrapv          Trap arithmetic overflows
362   --samples=PATH           location of test samples for FATE, if not set use
363                            \$FATE_SAMPLES at make invocation time.
364   --enable-neon-clobber-test check NEON registers for clobbering (should be
365                            used only for debugging purposes)
366   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
367                            should be used only for debugging purposes)
368   --enable-random          randomly enable/disable components
369   --disable-random
370   --enable-random=LIST     randomly enable/disable specific components or
371   --disable-random=LIST    component groups. LIST is a comma-separated list
372                            of NAME[:PROB] entries where NAME is a component
373                            (group) and PROB the probability associated with
374                            NAME (default 0.5).
375   --random-seed=VALUE      seed value for --enable/disable-random
376
377 NOTE: Object files are built at the place where configure is launched.
378 EOF
379   exit 0
380 }
381
382 quotes='""'
383
384 log(){
385     echo "$@" >> $logfile
386 }
387
388 log_file(){
389     log BEGIN $1
390     pr -n -t $1 >> $logfile
391     log END $1
392 }
393
394 echolog(){
395     log "$@"
396     echo "$@"
397 }
398
399 warn(){
400     log "WARNING: $*"
401     WARNINGS="${WARNINGS}WARNING: $*\n"
402 }
403
404 die(){
405     echolog "$@"
406     cat <<EOF
407
408 If you think configure made a mistake, make sure you are using the latest
409 version from Git.  If the latest version fails, report the problem to the
410 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
411 EOF
412     if disabled logging; then
413         cat <<EOF
414 Rerun configure with logging enabled (do not use --disable-logging), and
415 include the log this produces with your report.
416 EOF
417     else
418         cat <<EOF
419 Include the log file "$logfile" produced by configure as this will help
420 solving the problem.
421 EOF
422     fi
423     exit 1
424 }
425
426 # Avoid locale weirdness, besides we really just want to translate ASCII.
427 toupper(){
428     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
429 }
430
431 tolower(){
432     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
433 }
434
435 c_escape(){
436     echo "$*" | sed 's/["\\]/\\\0/g'
437 }
438
439 sh_quote(){
440     v=$(echo "$1" | sed "s/'/'\\\\''/g")
441     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
442     echo "$v"
443 }
444
445 cleanws(){
446     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//;s/\r//g'
447 }
448
449 filter(){
450     pat=$1
451     shift
452     for v; do
453         eval "case $v in $pat) echo $v ;; esac"
454     done
455 }
456
457 filter_out(){
458     pat=$1
459     shift
460     for v; do
461         eval "case $v in $pat) ;; *) echo $v ;; esac"
462     done
463 }
464
465 map(){
466     m=$1
467     shift
468     for v; do eval $m; done
469 }
470
471 add_suffix(){
472     suffix=$1
473     shift
474     for v; do echo ${v}${suffix}; done
475 }
476
477 set_all(){
478     value=$1
479     shift
480     for var in $*; do
481         eval $var=$value
482     done
483 }
484
485 set_weak(){
486     value=$1
487     shift
488     for var; do
489         eval : \${$var:=$value}
490     done
491 }
492
493 sanitize_var_name(){
494     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
495 }
496
497 set_safe(){
498     var=$1
499     shift
500     eval $(sanitize_var_name "$var")='$*'
501 }
502
503 get_safe(){
504     eval echo \$$(sanitize_var_name "$1")
505 }
506
507 pushvar(){
508     for pvar in $*; do
509         eval level=\${${pvar}_level:=0}
510         eval ${pvar}_${level}="\$$pvar"
511         eval ${pvar}_level=$(($level+1))
512     done
513 }
514
515 popvar(){
516     for pvar in $*; do
517         eval level=\${${pvar}_level:-0}
518         test $level = 0 && continue
519         eval level=$(($level-1))
520         eval $pvar="\${${pvar}_${level}}"
521         eval ${pvar}_level=$level
522         eval unset ${pvar}_${level}
523     done
524 }
525
526 enable(){
527     set_all yes $*
528 }
529
530 disable(){
531     set_all no $*
532 }
533
534 enable_weak(){
535     set_weak yes $*
536 }
537
538 disable_weak(){
539     set_weak no $*
540 }
541
542 enable_safe(){
543     for var; do
544         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
545     done
546 }
547
548 disable_safe(){
549     for var; do
550         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
551     done
552 }
553
554 do_enable_deep(){
555     for var; do
556         enabled $var && continue
557         eval sel="\$${var}_select"
558         eval sgs="\$${var}_suggest"
559         pushvar var sgs
560         enable_deep $sel
561         popvar sgs
562         enable_deep_weak $sgs
563         popvar var
564     done
565 }
566
567 enable_deep(){
568     do_enable_deep $*
569     enable $*
570 }
571
572 enable_deep_weak(){
573     for var; do
574         disabled $var && continue
575         pushvar var
576         do_enable_deep $var
577         popvar var
578         enable_weak $var
579     done
580 }
581
582 enabled(){
583     test "${1#!}" = "$1" && op== || op=!=
584     eval test "x\$${1#!}" $op "xyes"
585 }
586
587 disabled(){
588     test "${1#!}" = "$1" && op== || op=!=
589     eval test "x\$${1#!}" $op "xno"
590 }
591
592 enabled_all(){
593     for opt; do
594         enabled $opt || return 1
595     done
596 }
597
598 disabled_all(){
599     for opt; do
600         disabled $opt || return 1
601     done
602 }
603
604 enabled_any(){
605     for opt; do
606         enabled $opt && return 0
607     done
608 }
609
610 disabled_any(){
611     for opt; do
612         disabled $opt && return 0
613     done
614     return 1
615 }
616
617 set_default(){
618     for opt; do
619         eval : \${$opt:=\$${opt}_default}
620     done
621 }
622
623 is_in(){
624     value=$1
625     shift
626     for var in $*; do
627         [ $var = $value ] && return 0
628     done
629     return 1
630 }
631
632 do_check_deps(){
633     for cfg; do
634         cfg="${cfg#!}"
635         enabled ${cfg}_checking && die "Circular dependency for $cfg."
636         disabled ${cfg}_checking && continue
637         enable ${cfg}_checking
638         append allopts $cfg
639
640         eval dep_all="\$${cfg}_deps"
641         eval dep_any="\$${cfg}_deps_any"
642         eval dep_sel="\$${cfg}_select"
643         eval dep_sgs="\$${cfg}_suggest"
644         eval dep_ifa="\$${cfg}_if"
645         eval dep_ifn="\$${cfg}_if_any"
646
647         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
648         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
649         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
650
651         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
652         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
653         enabled_all  $dep_all || disable $cfg
654         enabled_any  $dep_any || disable $cfg
655         disabled_any $dep_sel && disable $cfg
656
657         if enabled $cfg; then
658             enable_deep $dep_sel
659             enable_deep_weak $dep_sgs
660         fi
661
662         disable ${cfg}_checking
663     done
664 }
665
666 check_deps(){
667     unset allopts
668
669     do_check_deps "$@"
670
671     for cfg in $allopts; do
672         enabled $cfg || continue
673         eval dep_extralibs="\$${cfg}_extralibs"
674         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
675     done
676 }
677
678 print_config(){
679     pfx=$1
680     files=$2
681     shift 2
682     map 'eval echo "$v \${$v:-no}"' "$@" |
683     awk "BEGIN { split(\"$files\", files) }
684         {
685             c = \"$pfx\" toupper(\$1);
686             v = \$2;
687             sub(/yes/, 1, v);
688             sub(/no/,  0, v);
689             for (f in files) {
690                 file = files[f];
691                 if (file ~ /\\.h\$/) {
692                     printf(\"#define %s %d\\n\", c, v) >>file;
693                 } else if (file ~ /\\.asm\$/) {
694                     printf(\"%%define %s %d\\n\", c, v) >>file;
695                 } else if (file ~ /\\.mak\$/) {
696                     n = -v ? \"\" : \"!\";
697                     printf(\"%s%s=yes\\n\", n, c) >>file;
698                 } else if (file ~ /\\.texi\$/) {
699                     pre = -v ? \"\" : \"@c \";
700                     yesno = \$2;
701                     c2 = tolower(c);
702                     gsub(/_/, \"-\", c2);
703                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
704                 }
705             }
706         }"
707 }
708
709 print_enabled(){
710     suf=$1
711     shift
712     for v; do
713         enabled $v && printf "%s\n" ${v%$suf};
714     done
715 }
716
717 append(){
718     var=$1
719     shift
720     eval "$var=\"\$$var $*\""
721 }
722
723 prepend(){
724     var=$1
725     shift
726     eval "$var=\"$* \$$var\""
727 }
728
729 add_cppflags(){
730     append CPPFLAGS "$@"
731 }
732
733 add_cflags(){
734     append CFLAGS $($cflags_filter "$@")
735 }
736
737 add_cxxflags(){
738     append CXXFLAGS $($cflags_filter "$@")
739 }
740
741 add_asflags(){
742     append ASFLAGS $($asflags_filter "$@")
743 }
744
745 add_ldflags(){
746     append LDFLAGS $($ldflags_filter "$@")
747 }
748
749 add_stripflags(){
750     append ASMSTRIPFLAGS "$@"
751 }
752
753 add_extralibs(){
754     prepend extralibs $($ldflags_filter "$@")
755 }
756
757 add_host_cppflags(){
758     append host_cppflags "$@"
759 }
760
761 add_host_cflags(){
762     append host_cflags $($host_cflags_filter "$@")
763 }
764
765 add_host_ldflags(){
766     append host_ldflags $($host_ldflags_filter "$@")
767 }
768
769 add_compat(){
770     append compat_objs $1
771     shift
772     map 'add_cppflags -D$v' "$@"
773 }
774
775 check_cmd(){
776     log "$@"
777     "$@" >> $logfile 2>&1
778 }
779
780 check_stat(){
781     log check_stat "$@"
782     stat "$1" >> $logfile 2>&1
783 }
784
785 cc_o(){
786     eval printf '%s\\n' $CC_O
787 }
788
789 cc_e(){
790     eval printf '%s\\n' $CC_E
791 }
792
793 check_cc(){
794     log check_cc "$@"
795     cat > $TMPC
796     log_file $TMPC
797     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
798 }
799
800 check_cxx(){
801     log check_cxx "$@"
802     cat > $TMPCPP
803     log_file $TMPCPP
804     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
805 }
806
807 check_oc(){
808     log check_oc "$@"
809     cat > $TMPM
810     log_file $TMPM
811     check_cmd $cc -Werror=missing-prototypes $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPM
812 }
813
814 check_cpp(){
815     log check_cpp "$@"
816     cat > $TMPC
817     log_file $TMPC
818     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
819 }
820
821 as_o(){
822     eval printf '%s\\n' $AS_O
823 }
824
825 check_as(){
826     log check_as "$@"
827     cat > $TMPS
828     log_file $TMPS
829     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
830 }
831
832 check_inline_asm(){
833     log check_inline_asm "$@"
834     name="$1"
835     code="$2"
836     shift 2
837     disable $name
838     check_cc "$@" <<EOF && enable $name
839 void foo(void){ __asm__ volatile($code); }
840 EOF
841 }
842
843 check_insn(){
844     log check_insn "$@"
845     check_inline_asm ${1}_inline "\"$2\""
846     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
847 }
848
849 check_yasm(){
850     log check_yasm "$@"
851     echo "$1" > $TMPS
852     log_file $TMPS
853     shift 1
854     check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS
855 }
856
857 ld_o(){
858     eval printf '%s\\n' $LD_O
859 }
860
861 check_ld(){
862     log check_ld "$@"
863     type=$1
864     shift 1
865     flags=$(filter_out '-l*|*.so' $@)
866     libs=$(filter '-l*|*.so' $@)
867     check_$type $($cflags_filter $flags) || return
868     flags=$($ldflags_filter $flags)
869     libs=$($ldflags_filter $libs)
870     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
871 }
872
873 print_include(){
874     hdr=$1
875     test "${hdr%.h}" = "${hdr}" &&
876         echo "#include $hdr"    ||
877         echo "#include <$hdr>"
878 }
879
880 check_code(){
881     log check_code "$@"
882     check=$1
883     headers=$2
884     code=$3
885     shift 3
886     {
887         for hdr in $headers; do
888             print_include $hdr
889         done
890         echo "int main(void) { $code; return 0; }"
891     } | check_$check "$@"
892 }
893
894 check_cppflags(){
895     log check_cppflags "$@"
896     check_cc "$@" <<EOF && append CPPFLAGS "$@"
897 int x;
898 EOF
899 }
900
901 test_cflags(){
902     log test_cflags "$@"
903     set -- $($cflags_filter "$@")
904     check_cc "$@" <<EOF
905 int x;
906 EOF
907 }
908
909 check_cflags(){
910     log check_cflags "$@"
911     test_cflags "$@" && add_cflags "$@"
912 }
913
914 check_cxxflags(){
915     log check_cxxflags "$@"
916     set -- $($cflags_filter "$@")
917     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
918 int x;
919 EOF
920 }
921
922 test_ldflags(){
923     log test_ldflags "$@"
924     check_ld "cc" "$@" <<EOF
925 int main(void){ return 0; }
926 EOF
927 }
928
929 check_ldflags(){
930     log check_ldflags "$@"
931     test_ldflags "$@" && add_ldflags "$@"
932 }
933
934 test_stripflags(){
935     log test_stripflags "$@"
936     # call check_cc to get a fresh TMPO
937     check_cc <<EOF
938 int main(void) { return 0; }
939 EOF
940     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
941 }
942
943 check_stripflags(){
944     log check_stripflags "$@"
945     test_stripflags "$@" && add_stripflags "$@"
946 }
947
948 check_header(){
949     log check_header "$@"
950     header=$1
951     shift
952     disable_safe $header
953     check_cpp "$@" <<EOF && enable_safe $header
954 #include <$header>
955 int x;
956 EOF
957 }
958
959 check_header_oc(){
960     log check_header_oc "$@"
961     rm -f -- "$TMPO"
962     header=$1
963     shift
964     disable_safe $header
965     {
966        echo "#include <$header>"
967        echo "int main(void) { return 0; }"
968     } | check_oc && check_stat "$TMPO" && enable_safe $headers
969 }
970
971 check_func(){
972     log check_func "$@"
973     func=$1
974     shift
975     disable $func
976     check_ld "cc" "$@" <<EOF && enable $func
977 extern int $func();
978 int main(void){ $func(); }
979 EOF
980 }
981
982 check_mathfunc(){
983     log check_mathfunc "$@"
984     func=$1
985     narg=$2
986     shift 2
987     test $narg = 2 && args="f, g" || args="f"
988     disable $func
989     check_ld "cc" "$@" <<EOF && enable $func
990 #include <math.h>
991 float foo(float f, float g) { return $func($args); }
992 int main(void){ return (int) foo; }
993 EOF
994 }
995
996 check_func_headers(){
997     log check_func_headers "$@"
998     headers=$1
999     funcs=$2
1000     shift 2
1001     {
1002         for hdr in $headers; do
1003             print_include $hdr
1004         done
1005         for func in $funcs; do
1006             echo "long check_$func(void) { return (long) $func; }"
1007         done
1008         echo "int main(void) { return 0; }"
1009     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
1010 }
1011
1012 check_class_headers_cpp(){
1013     log check_class_headers_cpp "$@"
1014     headers=$1
1015     classes=$2
1016     shift 2
1017     {
1018         for hdr in $headers; do
1019             echo "#include <$hdr>"
1020         done
1021         echo "int main(void) { "
1022         i=1
1023         for class in $classes; do
1024             echo "$class obj$i;"
1025             i=$(expr $i + 1)
1026         done
1027         echo "return 0; }"
1028     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
1029 }
1030
1031 check_cpp_condition(){
1032     log check_cpp_condition "$@"
1033     header=$1
1034     condition=$2
1035     shift 2
1036     check_cpp "$@" <<EOF
1037 #include <$header>
1038 #if !($condition)
1039 #error "unsatisfied condition: $condition"
1040 #endif
1041 EOF
1042 }
1043
1044 check_lib(){
1045     log check_lib "$@"
1046     header="$1"
1047     func="$2"
1048     shift 2
1049     check_header $header && check_func $func "$@" && add_extralibs "$@"
1050 }
1051
1052 check_lib2(){
1053     log check_lib2 "$@"
1054     headers="$1"
1055     funcs="$2"
1056     shift 2
1057     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1058 }
1059
1060 check_lib_cpp(){
1061     log check_lib_cpp "$@"
1062     headers="$1"
1063     classes="$2"
1064     shift 2
1065     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1066 }
1067
1068 check_pkg_config(){
1069     log check_pkg_config "$@"
1070     pkgandversion="$1"
1071     pkg="${1%% *}"
1072     headers="$2"
1073     funcs="$3"
1074     shift 3
1075     check_cmd $pkg_config --exists --print-errors $pkgandversion || return
1076     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1077     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1078     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1079         set_safe ${pkg}_cflags $pkg_cflags   &&
1080         set_safe ${pkg}_libs   $pkg_libs
1081 }
1082
1083 check_exec(){
1084     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1085 }
1086
1087 check_exec_crash(){
1088     code=$(cat)
1089
1090     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1091     # are safe but may not be available everywhere.  Thus we use
1092     # raise(SIGTERM) instead.  The check is run in a subshell so we
1093     # can redirect the "Terminated" message from the shell.  SIGBUS
1094     # is not defined by standard C so it is used conditionally.
1095
1096     (check_exec "$@") >> $logfile 2>&1 <<EOF
1097 #include <signal.h>
1098 static void sighandler(int sig){
1099     raise(SIGTERM);
1100 }
1101 int foo(void){
1102     $code
1103 }
1104 int (*func_ptr)(void) = foo;
1105 int main(void){
1106     signal(SIGILL, sighandler);
1107     signal(SIGFPE, sighandler);
1108     signal(SIGSEGV, sighandler);
1109 #ifdef SIGBUS
1110     signal(SIGBUS, sighandler);
1111 #endif
1112     return func_ptr();
1113 }
1114 EOF
1115 }
1116
1117 check_type(){
1118     log check_type "$@"
1119     headers=$1
1120     type=$2
1121     shift 2
1122     disable_safe "$type"
1123     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1124 }
1125
1126 check_struct(){
1127     log check_struct "$@"
1128     headers=$1
1129     struct=$2
1130     member=$3
1131     shift 3
1132     disable_safe "${struct}_${member}"
1133     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1134         enable_safe "${struct}_${member}"
1135 }
1136
1137 check_builtin(){
1138     log check_builtin "$@"
1139     name=$1
1140     headers=$2
1141     builtin=$3
1142     shift 3
1143     disable "$name"
1144     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1145 }
1146
1147 check_compile_assert(){
1148     log check_compile_assert "$@"
1149     name=$1
1150     headers=$2
1151     condition=$3
1152     shift 3
1153     disable "$name"
1154     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1155 }
1156
1157 require(){
1158     name="$1"
1159     header="$2"
1160     func="$3"
1161     shift 3
1162     check_lib $header $func "$@" || die "ERROR: $name not found"
1163 }
1164
1165 require2(){
1166     name="$1"
1167     headers="$2"
1168     func="$3"
1169     shift 3
1170     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1171 }
1172
1173 require_cpp(){
1174     name="$1"
1175     headers="$2"
1176     classes="$3"
1177     shift 3
1178     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1179 }
1180
1181 require_pkg_config(){
1182     pkg="$1"
1183     check_pkg_config "$@" || die "ERROR: $pkg not found"
1184     add_cflags    $(get_safe ${pkg}_cflags)
1185     add_extralibs $(get_safe ${pkg}_libs)
1186 }
1187
1188 require_libfreetype(){
1189     log require_libfreetype "$@"
1190     pkg="freetype2"
1191     check_cmd $pkg_config --exists --print-errors $pkg \
1192       || die "ERROR: $pkg not found"
1193     pkg_cflags=$($pkg_config --cflags $pkg)
1194     pkg_libs=$($pkg_config --libs $pkg)
1195     {
1196         echo "#include <ft2build.h>"
1197         echo "#include FT_FREETYPE_H"
1198         echo "long check_func(void) { return (long) FT_Init_FreeType; }"
1199         echo "int main(void) { return 0; }"
1200     } | check_ld "cc" $pkg_cflags $pkg_libs \
1201       && set_safe ${pkg}_cflags $pkg_cflags \
1202       && set_safe ${pkg}_libs   $pkg_libs \
1203       || die "ERROR: $pkg not found"
1204     add_cflags    $(get_safe ${pkg}_cflags)
1205     add_extralibs $(get_safe ${pkg}_libs)
1206 }
1207
1208 hostcc_e(){
1209     eval printf '%s\\n' $HOSTCC_E
1210 }
1211
1212 hostcc_o(){
1213     eval printf '%s\\n' $HOSTCC_O
1214 }
1215
1216 check_host_cc(){
1217     log check_host_cc "$@"
1218     cat > $TMPC
1219     log_file $TMPC
1220     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1221 }
1222
1223 check_host_cpp(){
1224     log check_host_cpp "$@"
1225     cat > $TMPC
1226     log_file $TMPC
1227     check_cmd $host_cc $HOSTCPPFLAGS $HOSTCFLAGS "$@" $(hostcc_e $TMPO) $TMPC
1228 }
1229
1230 check_host_cppflags(){
1231     log check_host_cppflags "$@"
1232     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1233 int x;
1234 EOF
1235 }
1236
1237 check_host_cflags(){
1238     log check_host_cflags "$@"
1239     set -- $($host_cflags_filter "$@")
1240     check_host_cc "$@" <<EOF && append host_cflags "$@"
1241 int x;
1242 EOF
1243 }
1244
1245 check_host_cpp_condition(){
1246     log check_host_cpp_condition "$@"
1247     header=$1
1248     condition=$2
1249     shift 2
1250     check_host_cpp "$@" <<EOF
1251 #include <$header>
1252 #if !($condition)
1253 #error "unsatisfied condition: $condition"
1254 #endif
1255 EOF
1256 }
1257
1258 apply(){
1259     file=$1
1260     shift
1261     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1262 }
1263
1264 cp_if_changed(){
1265     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1266     mkdir -p "$(dirname $2)"
1267     $cp_f "$1" "$2"
1268 }
1269
1270 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1271 # system-dependent things.
1272
1273 COMPONENT_LIST="
1274     bsfs
1275     decoders
1276     demuxers
1277     encoders
1278     filters
1279     hwaccels
1280     indevs
1281     muxers
1282     outdevs
1283     parsers
1284     protocols
1285 "
1286
1287 EXAMPLE_LIST="
1288     avio_reading_example
1289     decoding_encoding_example
1290     demuxing_decoding_example
1291     filter_audio_example
1292     filtering_audio_example
1293     filtering_video_example
1294     metadata_example
1295     muxing_example
1296     remuxing_example
1297     resampling_audio_example
1298     scaling_video_example
1299     transcode_aac_example
1300     transcoding_example
1301 "
1302
1303 EXTERNAL_LIBRARY_LIST="
1304     avisynth
1305     bzlib
1306     crystalhd
1307     decklink
1308     frei0r
1309     gnutls
1310     iconv
1311     ladspa
1312     libaacplus
1313     libass
1314     libbluray
1315     libbs2b
1316     libcaca
1317     libcdio
1318     libcelt
1319     libdc1394
1320     libfaac
1321     libfdk_aac
1322     libflite
1323     libfontconfig
1324     libfreetype
1325     libgme
1326     libgsm
1327     libiec61883
1328     libilbc
1329     libmodplug
1330     libmp3lame
1331     libnut
1332     libopencore_amrnb
1333     libopencore_amrwb
1334     libopencv
1335     libopenjpeg
1336     libopus
1337     libpulse
1338     libquvi
1339     librtmp
1340     libschroedinger
1341     libshine
1342     libsoxr
1343     libspeex
1344     libssh
1345     libstagefright_h264
1346     libtheora
1347     libtwolame
1348     libutvideo
1349     libv4l2
1350     libvidstab
1351     libvo_aacenc
1352     libvo_amrwbenc
1353     libvorbis
1354     libvpx
1355     libwavpack
1356     libwebp
1357     libx264
1358     libx265
1359     libxavs
1360     libxvid
1361     libzmq
1362     libzvbi
1363     openal
1364     opencl
1365     opengl
1366     openssl
1367     x11grab
1368     xlib
1369     zlib
1370 "
1371
1372 DOCUMENT_LIST="
1373     doc
1374     htmlpages
1375     manpages
1376     podpages
1377     txtpages
1378 "
1379
1380 FEATURE_LIST="
1381     ftrapv
1382     gray
1383     hardcoded_tables
1384     runtime_cpudetect
1385     safe_bitstream_reader
1386     shared
1387     small
1388     sram
1389     static
1390     swscale_alpha
1391 "
1392
1393 HWACCEL_LIST="
1394     dxva2
1395     vaapi
1396     vda
1397     vdpau
1398     xvmc
1399 "
1400
1401 LIBRARY_LIST="
1402     avcodec
1403     avdevice
1404     avfilter
1405     avformat
1406     avresample
1407     avutil
1408     postproc
1409     swresample
1410     swscale
1411 "
1412
1413 LICENSE_LIST="
1414     gpl
1415     nonfree
1416     version3
1417 "
1418
1419 PROGRAM_LIST="
1420     ffplay
1421     ffprobe
1422     ffserver
1423     ffmpeg
1424 "
1425
1426 SUBSYSTEM_LIST="
1427     dct
1428     dwt
1429     error_resilience
1430     fast_unaligned
1431     fft
1432     lsp
1433     lzo
1434     mdct
1435     network
1436     rdft
1437 "
1438
1439 CONFIG_LIST="
1440     $COMPONENT_LIST
1441     $DOCUMENT_LIST
1442     $EXAMPLE_LIST
1443     $EXTERNAL_LIBRARY_LIST
1444     $FEATURE_LIST
1445     $HWACCEL_LIST
1446     $LICENSE_LIST
1447     $LIBRARY_LIST
1448     $PROGRAM_LIST
1449     $SUBSYSTEM_LIST
1450     fontconfig
1451     incompatible_libav_abi
1452     memalign_hack
1453     memory_poisoning
1454     neon_clobber_test
1455     pic
1456     pod2man
1457     raise_major
1458     thumb
1459     xmm_clobber_test
1460 "
1461
1462 THREADS_LIST="
1463     pthreads
1464     os2threads
1465     w32threads
1466 "
1467
1468 ATOMICS_LIST="
1469     atomics_gcc
1470     atomics_suncc
1471     atomics_win32
1472 "
1473
1474 ARCH_LIST="
1475     aarch64
1476     alpha
1477     arm
1478     avr32
1479     avr32_ap
1480     avr32_uc
1481     bfin
1482     ia64
1483     m68k
1484     mips
1485     mips64
1486     parisc
1487     ppc
1488     ppc64
1489     s390
1490     sh4
1491     sparc
1492     sparc64
1493     tilegx
1494     tilepro
1495     tomi
1496     x86
1497     x86_32
1498     x86_64
1499 "
1500
1501 ARCH_EXT_LIST_ARM="
1502     armv5te
1503     armv6
1504     armv6t2
1505     armv8
1506     neon
1507     vfp
1508     vfpv3
1509 "
1510
1511 ARCH_EXT_LIST_MIPS="
1512     mipsfpu
1513     mips32r2
1514     mipsdspr1
1515     mipsdspr2
1516 "
1517
1518 ARCH_EXT_LIST_X86_SIMD="
1519     amd3dnow
1520     amd3dnowext
1521     avx
1522     avx2
1523     fma3
1524     fma4
1525     mmx
1526     mmxext
1527     sse
1528     sse2
1529     sse3
1530     sse4
1531     sse42
1532     ssse3
1533     xop
1534 "
1535
1536 ARCH_EXT_LIST_PPC="
1537     altivec
1538     dcbzl
1539     ldbrx
1540     ppc4xx
1541 "
1542
1543 ARCH_EXT_LIST_X86="
1544     $ARCH_EXT_LIST_X86_SIMD
1545     cpunop
1546     i686
1547 "
1548
1549 ARCH_EXT_LIST="
1550     $ARCH_EXT_LIST_ARM
1551     $ARCH_EXT_LIST_PPC
1552     $ARCH_EXT_LIST_X86
1553     $ARCH_EXT_LIST_MIPS
1554     loongson
1555 "
1556
1557 ARCH_FEATURES="
1558     aligned_stack
1559     fast_64bit
1560     fast_clz
1561     fast_cmov
1562     local_aligned_8
1563     local_aligned_16
1564     local_aligned_32
1565 "
1566
1567 BUILTIN_LIST="
1568     atomic_cas_ptr
1569     machine_rw_barrier
1570     MemoryBarrier
1571     mm_empty
1572     rdtsc
1573     sarestart
1574     sync_val_compare_and_swap
1575 "
1576 HAVE_LIST_CMDLINE="
1577     inline_asm
1578     symver
1579     yasm
1580 "
1581
1582 HAVE_LIST_PUB="
1583     bigendian
1584     fast_unaligned
1585     incompatible_libav_abi
1586 "
1587
1588 HEADERS_LIST="
1589     alsa_asoundlib_h
1590     altivec_h
1591     arpa_inet_h
1592     asm_types_h
1593     cdio_paranoia_h
1594     cdio_paranoia_paranoia_h
1595     CL_cl_h
1596     dev_bktr_ioctl_bt848_h
1597     dev_bktr_ioctl_meteor_h
1598     dev_ic_bt8xx_h
1599     dev_video_bktr_ioctl_bt848_h
1600     dev_video_meteor_ioctl_meteor_h
1601     direct_h
1602     dlfcn_h
1603     dxva_h
1604     ES2_gl_h
1605     gsm_h
1606     io_h
1607     mach_mach_time_h
1608     machine_ioctl_bt848_h
1609     machine_ioctl_meteor_h
1610     malloc_h
1611     openjpeg_1_5_openjpeg_h
1612     OpenGL_gl3_h
1613     poll_h
1614     sndio_h
1615     soundcard_h
1616     sys_mman_h
1617     sys_param_h
1618     sys_resource_h
1619     sys_select_h
1620     sys_soundcard_h
1621     sys_time_h
1622     sys_un_h
1623     sys_videoio_h
1624     termios_h
1625     unistd_h
1626     windows_h
1627     winsock2_h
1628 "
1629
1630 MATH_FUNCS="
1631     atanf
1632     atan2f
1633     cbrt
1634     cbrtf
1635     cosf
1636     exp2
1637     exp2f
1638     expf
1639     isinf
1640     isnan
1641     ldexpf
1642     llrint
1643     llrintf
1644     log2
1645     log2f
1646     log10f
1647     lrint
1648     lrintf
1649     powf
1650     rint
1651     round
1652     roundf
1653     sinf
1654     trunc
1655     truncf
1656 "
1657
1658 SYSTEM_FUNCS="
1659     access
1660     aligned_malloc
1661     clock_gettime
1662     closesocket
1663     CommandLineToArgvW
1664     CoTaskMemFree
1665     CryptGenRandom
1666     dlopen
1667     fcntl
1668     flt_lim
1669     fork
1670     getaddrinfo
1671     gethrtime
1672     getopt
1673     GetProcessAffinityMask
1674     GetProcessMemoryInfo
1675     GetProcessTimes
1676     getrusage
1677     getservbyport
1678     GetSystemTimeAsFileTime
1679     gettimeofday
1680     glob
1681     glXGetProcAddress
1682     inet_aton
1683     isatty
1684     jack_port_get_latency_range
1685     kbhit
1686     localtime_r
1687     lzo1x_999_compress
1688     mach_absolute_time
1689     MapViewOfFile
1690     memalign
1691     mkstemp
1692     mmap
1693     mprotect
1694     nanosleep
1695     PeekNamedPipe
1696     posix_memalign
1697     pthread_cancel
1698     sched_getaffinity
1699     SetConsoleTextAttribute
1700     setmode
1701     setrlimit
1702     Sleep
1703     strerror_r
1704     sysconf
1705     sysctl
1706     usleep
1707     VirtualAlloc
1708     wglGetProcAddress
1709 "
1710
1711 TOOLCHAIN_FEATURES="
1712     asm_mod_q
1713     attribute_may_alias
1714     attribute_packed
1715     ebp_available
1716     ebx_available
1717     gnu_as
1718     gnu_windres
1719     ibm_asm
1720     inline_asm_labels
1721     inline_asm_nonlocal_labels
1722     inline_asm_direct_symbol_refs
1723     pragma_deprecated
1724     rsync_contimeout
1725     symver_asm_label
1726     symver_gnu_asm
1727     vfp_args
1728     xform_asm
1729     xmm_clobbers
1730 "
1731
1732 TYPES_LIST="
1733     socklen_t
1734     struct_addrinfo
1735     struct_group_source_req
1736     struct_ip_mreq_source
1737     struct_ipv6_mreq
1738     struct_pollfd
1739     struct_rusage_ru_maxrss
1740     struct_sctp_event_subscribe
1741     struct_sockaddr_in6
1742     struct_sockaddr_sa_len
1743     struct_sockaddr_storage
1744     struct_stat_st_mtim_tv_nsec
1745     struct_v4l2_frmivalenum_discrete
1746 "
1747
1748 HAVE_LIST="
1749     $ARCH_EXT_LIST
1750     $(add_suffix _external $ARCH_EXT_LIST)
1751     $(add_suffix _inline   $ARCH_EXT_LIST)
1752     $ARCH_FEATURES
1753     $ATOMICS_LIST
1754     $BUILTIN_LIST
1755     $HAVE_LIST_CMDLINE
1756     $HAVE_LIST_PUB
1757     $HEADERS_LIST
1758     $MATH_FUNCS
1759     $SYSTEM_FUNCS
1760     $THREADS_LIST
1761     $TOOLCHAIN_FEATURES
1762     $TYPES_LIST
1763     atomics_native
1764     dos_paths
1765     dxva2api_cobj
1766     dxva2_lib
1767     libc_msvcrt
1768     libdc1394_1
1769     libdc1394_2
1770     makeinfo
1771     perl
1772     pod2man
1773     sdl
1774     texi2html
1775     threads
1776     vdpau_x11
1777     xlib
1778 "
1779
1780 # options emitted with CONFIG_ prefix but not available on the command line
1781 CONFIG_EXTRA="
1782     aandcttables
1783     ac3dsp
1784     audio_frame_queue
1785     cabac
1786     dsputil
1787     exif
1788     frame_thread_encoder
1789     gcrypt
1790     golomb
1791     gplv3
1792     h263dsp
1793     h264chroma
1794     h264dsp
1795     h264pred
1796     h264qpel
1797     hpeldsp
1798     huffman
1799     intrax8
1800     lgplv3
1801     llviddsp
1802     lpc
1803     mpegaudio
1804     mpegaudiodsp
1805     mpegvideo
1806     mpegvideoenc
1807     nettle
1808     rangecoder
1809     riffdec
1810     riffenc
1811     rtpdec
1812     rtpenc_chain
1813     sinewin
1814     tpeldsp
1815     videodsp
1816     vp3dsp
1817 "
1818
1819 CMDLINE_SELECT="
1820     $ARCH_EXT_LIST
1821     $CONFIG_LIST
1822     $HAVE_LIST_CMDLINE
1823     $THREADS_LIST
1824     asm
1825     cross_compile
1826     debug
1827     extra_warnings
1828     logging
1829     lto
1830     optimizations
1831     rpath
1832     stripping
1833 "
1834
1835 PATHS_LIST="
1836     bindir
1837     datadir
1838     docdir
1839     incdir
1840     libdir
1841     mandir
1842     prefix
1843     shlibdir
1844 "
1845
1846 CMDLINE_SET="
1847     $PATHS_LIST
1848     ar
1849     arch
1850     as
1851     assert_level
1852     build_suffix
1853     cc
1854     cpu
1855     cross_prefix
1856     cxx
1857     dep_cc
1858     extra_version
1859     gas
1860     host_cc
1861     host_cflags
1862     host_ld
1863     host_ldflags
1864     host_libs
1865     host_os
1866     install
1867     ld
1868     logfile
1869     malloc_prefix
1870     nm
1871     optflags
1872     pkg_config
1873     pkg_config_flags
1874     progs_suffix
1875     random_seed
1876     ranlib
1877     samples
1878     strip
1879     sysinclude
1880     sysroot
1881     target_exec
1882     target_os
1883     target_path
1884     target_samples
1885     tempprefix
1886     toolchain
1887     valgrind
1888     yasmexe
1889 "
1890
1891 CMDLINE_APPEND="
1892     extra_cflags
1893     extra_cxxflags
1894     host_cppflags
1895 "
1896
1897 # code dependency declarations
1898
1899 # architecture extensions
1900
1901 armv5te_deps="arm"
1902 armv6_deps="arm"
1903 armv6t2_deps="arm"
1904 armv8_deps="aarch64"
1905 neon_deps_any="aarch64 arm"
1906 vfp_deps_any="aarch64 arm"
1907 vfpv3_deps="vfp"
1908
1909 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1910
1911 mipsfpu_deps="mips"
1912 mips32r2_deps="mips"
1913 mipsdspr1_deps="mips"
1914 mipsdspr2_deps="mips"
1915
1916 altivec_deps="ppc"
1917 ppc4xx_deps="ppc"
1918
1919 cpunop_deps="i686"
1920 x86_64_select="i686"
1921 x86_64_suggest="fast_cmov"
1922
1923 amd3dnow_deps="mmx"
1924 amd3dnowext_deps="amd3dnow"
1925 i686_deps="x86"
1926 mmx_deps="x86"
1927 mmxext_deps="mmx"
1928 sse_deps="mmxext"
1929 sse2_deps="sse"
1930 sse3_deps="sse2"
1931 ssse3_deps="sse3"
1932 sse4_deps="ssse3"
1933 sse42_deps="sse4"
1934 avx_deps="sse42"
1935 xop_deps="avx"
1936 fma3_deps="avx"
1937 fma4_deps="avx"
1938 avx2_deps="avx"
1939
1940 mmx_external_deps="yasm"
1941 mmx_inline_deps="inline_asm"
1942 mmx_suggest="mmx_external mmx_inline"
1943
1944 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1945     eval dep=\$${ext}_deps
1946     eval ${ext}_external_deps='"${dep}_external"'
1947     eval ${ext}_inline_deps='"${dep}_inline"'
1948     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1949 done
1950
1951 aligned_stack_if_any="aarch64 ppc x86"
1952 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1953 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1954 fast_unaligned_if_any="aarch64 ppc x86"
1955
1956 need_memalign="altivec neon sse"
1957
1958 # system capabilities
1959 log2_deps="!libc_msvcrt"
1960
1961 symver_if_any="symver_asm_label symver_gnu_asm"
1962
1963 # threading support
1964 atomics_gcc_if="sync_val_compare_and_swap"
1965 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1966 atomics_win32_if="MemoryBarrier"
1967 atomics_native_if_any="$ATOMICS_LIST"
1968 w32threads_deps="atomics_native"
1969 threads_if_any="$THREADS_LIST"
1970
1971 # subsystems
1972 dct_select="rdft"
1973 error_resilience_select="dsputil"
1974 frame_thread_encoder_deps="encoders threads"
1975 mdct_select="fft"
1976 rdft_select="fft"
1977 mpegaudio_select="mpegaudiodsp"
1978 mpegaudiodsp_select="dct"
1979 mpegvideo_select="dsputil h264chroma hpeldsp videodsp"
1980 mpegvideoenc_select="dsputil mpegvideo"
1981
1982 # decoders / encoders
1983 aac_decoder_select="mdct sinewin"
1984 aac_encoder_select="audio_frame_queue mdct sinewin"
1985 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1986 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1987 ac3_fixed_decoder_select="mdct ac3dsp ac3_parser dsputil"
1988 ac3_encoder_select="mdct ac3dsp dsputil"
1989 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1990 aic_decoder_select="dsputil golomb"
1991 alac_encoder_select="lpc"
1992 als_decoder_select="dsputil"
1993 amrnb_decoder_select="lsp"
1994 amrwb_decoder_select="lsp"
1995 amv_decoder_select="sp5x_decoder exif"
1996 amv_encoder_select="aandcttables"
1997 ape_decoder_select="dsputil"
1998 asv1_decoder_select="dsputil"
1999 asv1_encoder_select="dsputil"
2000 asv2_decoder_select="dsputil"
2001 asv2_encoder_select="dsputil"
2002 atrac1_decoder_select="mdct sinewin"
2003 atrac3_decoder_select="mdct"
2004 atrac3p_decoder_select="mdct sinewin"
2005 avrn_decoder_select="exif"
2006 bink_decoder_select="dsputil hpeldsp"
2007 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
2008 binkaudio_rdft_decoder_select="mdct rdft sinewin"
2009 cavs_decoder_select="dsputil golomb h264chroma videodsp"
2010 cllc_decoder_select="dsputil"
2011 comfortnoise_encoder_select="lpc"
2012 cook_decoder_select="dsputil mdct sinewin"
2013 cscd_decoder_select="lzo"
2014 cscd_decoder_suggest="zlib"
2015 dca_decoder_select="mdct"
2016 dirac_decoder_select="dsputil dwt golomb videodsp"
2017 dnxhd_decoder_select="dsputil"
2018 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
2019 dvvideo_decoder_select="dsputil"
2020 dvvideo_encoder_select="dsputil"
2021 dxa_decoder_select="zlib"
2022 eac3_decoder_select="ac3_decoder"
2023 eac3_encoder_select="ac3_encoder"
2024 eamad_decoder_select="aandcttables dsputil mpegvideo"
2025 eatgq_decoder_select="aandcttables"
2026 eatqi_decoder_select="aandcttables dsputil error_resilience mpegvideo"
2027 exr_decoder_select="zlib"
2028 ffv1_decoder_select="golomb rangecoder"
2029 ffv1_encoder_select="rangecoder"
2030 ffvhuff_decoder_select="huffyuv_decoder"
2031 ffvhuff_encoder_select="huffyuv_encoder"
2032 fic_decoder_select="golomb"
2033 flac_decoder_select="golomb"
2034 flac_encoder_select="dsputil golomb lpc"
2035 flashsv_decoder_select="zlib"
2036 flashsv_encoder_select="zlib"
2037 flashsv2_encoder_select="zlib"
2038 flashsv2_decoder_select="zlib"
2039 flv_decoder_select="h263_decoder"
2040 flv_encoder_select="h263_encoder"
2041 fourxm_decoder_select="dsputil"
2042 fraps_decoder_select="dsputil huffman"
2043 g2m_decoder_select="dsputil zlib"
2044 g729_decoder_select="dsputil"
2045 h261_decoder_select="error_resilience mpegvideo"
2046 h261_encoder_select="aandcttables mpegvideoenc"
2047 h263_decoder_select="error_resilience h263_parser h263dsp mpegvideo"
2048 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2049 h263i_decoder_select="h263_decoder"
2050 h263p_encoder_select="h263_encoder"
2051 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
2052 h264_decoder_suggest="error_resilience"
2053 hevc_decoder_select="cabac dsputil golomb videodsp"
2054 huffyuv_decoder_select="dsputil llviddsp"
2055 huffyuv_encoder_select="dsputil huffman llviddsp"
2056 iac_decoder_select="imc_decoder"
2057 imc_decoder_select="dsputil fft mdct sinewin"
2058 indeo3_decoder_select="hpeldsp"
2059 interplay_video_decoder_select="hpeldsp"
2060 jpegls_decoder_select="golomb mjpeg_decoder"
2061 jpegls_encoder_select="golomb"
2062 jv_decoder_select="dsputil"
2063 lagarith_decoder_select="dsputil"
2064 ljpeg_encoder_select="aandcttables mpegvideoenc"
2065 loco_decoder_select="golomb"
2066 mdec_decoder_select="dsputil error_resilience mpegvideo"
2067 metasound_decoder_select="lsp mdct sinewin"
2068 mimic_decoder_select="dsputil hpeldsp"
2069 mjpeg_decoder_select="dsputil hpeldsp exif"
2070 mjpeg_encoder_select="aandcttables mpegvideoenc"
2071 mjpegb_decoder_select="mjpeg_decoder"
2072 mlp_decoder_select="mlp_parser"
2073 motionpixels_decoder_select="dsputil"
2074 mp1_decoder_select="mpegaudio"
2075 mp1float_decoder_select="mpegaudio"
2076 mp2_decoder_select="mpegaudio"
2077 mp2float_decoder_select="mpegaudio"
2078 mp3_decoder_select="mpegaudio"
2079 mp3adu_decoder_select="mpegaudio"
2080 mp3adufloat_decoder_select="mpegaudio"
2081 mp3float_decoder_select="mpegaudio"
2082 mp3on4_decoder_select="mpegaudio"
2083 mp3on4float_decoder_select="mpegaudio"
2084 mpc7_decoder_select="dsputil mpegaudiodsp"
2085 mpc8_decoder_select="mpegaudiodsp"
2086 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2087 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2088 mpeg1video_decoder_select="error_resilience mpegvideo"
2089 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
2090 mpeg2video_decoder_select="error_resilience mpegvideo"
2091 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
2092 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2093 mpeg4_encoder_select="h263_encoder"
2094 msmpeg4v1_decoder_select="h263_decoder"
2095 msmpeg4v2_decoder_select="h263_decoder"
2096 msmpeg4v2_encoder_select="h263_encoder"
2097 msmpeg4v3_decoder_select="h263_decoder"
2098 msmpeg4v3_encoder_select="h263_encoder"
2099 mss2_decoder_select="error_resilience vc1_decoder"
2100 mxpeg_decoder_select="mjpeg_decoder"
2101 nellymoser_decoder_select="mdct sinewin"
2102 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2103 nuv_decoder_select="dsputil lzo"
2104 on2avc_decoder_select="mdct"
2105 png_decoder_select="zlib"
2106 png_encoder_select="dsputil zlib"
2107 prores_decoder_select="dsputil"
2108 prores_encoder_select="dsputil"
2109 qcelp_decoder_select="lsp"
2110 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2111 ra_144_encoder_select="audio_frame_queue lpc"
2112 ralf_decoder_select="golomb"
2113 rawvideo_decoder_select="dsputil"
2114 rtjpeg_decoder_select="dsputil"
2115 rv10_decoder_select="error_resilience h263_decoder h263dsp"
2116 rv10_encoder_select="h263_encoder"
2117 rv20_decoder_select="error_resilience h263_decoder h263dsp"
2118 rv20_encoder_select="h263_encoder"
2119 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
2120 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
2121 shorten_decoder_select="golomb"
2122 sipr_decoder_select="lsp"
2123 snow_decoder_select="dsputil dwt h264qpel hpeldsp rangecoder"
2124 snow_encoder_select="aandcttables dsputil dwt h264qpel hpeldsp mpegvideoenc rangecoder"
2125 sonic_decoder_select="golomb rangecoder"
2126 sonic_encoder_select="golomb rangecoder"
2127 sonic_ls_encoder_select="golomb rangecoder"
2128 sp5x_decoder_select="mjpeg_decoder"
2129 svq1_decoder_select="hpeldsp"
2130 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
2131 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2132 svq3_decoder_suggest="zlib"
2133 tak_decoder_select="dsputil"
2134 theora_decoder_select="vp3_decoder"
2135 thp_decoder_select="mjpeg_decoder"
2136 tiff_decoder_suggest="zlib"
2137 tiff_encoder_suggest="zlib"
2138 truehd_decoder_select="mlp_parser"
2139 truemotion2_decoder_select="dsputil"
2140 truespeech_decoder_select="dsputil"
2141 tscc_decoder_select="zlib"
2142 twinvq_decoder_select="mdct lsp sinewin"
2143 utvideo_decoder_select="dsputil"
2144 utvideo_encoder_select="dsputil huffman"
2145 vble_decoder_select="dsputil"
2146 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel intrax8"
2147 vc1image_decoder_select="vc1_decoder"
2148 vorbis_decoder_select="mdct"
2149 vorbis_encoder_select="mdct"
2150 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2151 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
2152 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
2153 vp6a_decoder_select="vp6_decoder"
2154 vp6f_decoder_select="vp6_decoder"
2155 vp7_decoder_select="h264pred videodsp"
2156 vp8_decoder_select="h264pred videodsp"
2157 vp9_decoder_select="videodsp"
2158 webp_decoder_select="vp8_decoder"
2159 wmapro_decoder_select="mdct sinewin"
2160 wmav1_decoder_select="mdct sinewin"
2161 wmav1_encoder_select="mdct sinewin"
2162 wmav2_decoder_select="mdct sinewin"
2163 wmav2_encoder_select="mdct sinewin"
2164 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2165 wmv1_decoder_select="h263_decoder"
2166 wmv1_encoder_select="h263_encoder"
2167 wmv2_decoder_select="h263_decoder intrax8 videodsp"
2168 wmv2_encoder_select="h263_encoder"
2169 wmv3_decoder_select="vc1_decoder"
2170 wmv3image_decoder_select="wmv3_decoder"
2171 zerocodec_decoder_select="zlib"
2172 zlib_decoder_select="zlib"
2173 zlib_encoder_select="zlib"
2174 zmbv_decoder_select="zlib"
2175 zmbv_encoder_select="zlib"
2176
2177 # hardware accelerators
2178 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2179 dxva2_deps="dxva2api_h"
2180 vaapi_deps="va_va_h"
2181 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2182 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2183 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2184 xvmc_deps="X11_extensions_XvMClib_h"
2185
2186 h263_vaapi_hwaccel_deps="vaapi"
2187 h263_vaapi_hwaccel_select="h263_decoder"
2188 h263_vdpau_hwaccel_deps="vdpau"
2189 h263_vdpau_hwaccel_select="h263_decoder"
2190 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2191 h264_dxva2_hwaccel_deps="dxva2"
2192 h264_dxva2_hwaccel_select="h264_decoder"
2193 h264_vaapi_hwaccel_deps="vaapi"
2194 h264_vaapi_hwaccel_select="h264_decoder"
2195 h264_vda_decoder_deps="vda"
2196 h264_vda_decoder_select="h264_decoder"
2197 h264_vda_hwaccel_deps="vda"
2198 h264_vda_hwaccel_select="h264_decoder"
2199 h264_vda_old_hwaccel_deps="vda"
2200 h264_vda_old_hwaccel_select="h264_decoder"
2201 h264_vdpau_decoder_deps="vdpau"
2202 h264_vdpau_decoder_select="h264_decoder"
2203 h264_vdpau_hwaccel_deps="vdpau"
2204 h264_vdpau_hwaccel_select="h264_decoder"
2205 mpeg_vdpau_decoder_deps="vdpau"
2206 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2207 mpeg_xvmc_hwaccel_deps="xvmc"
2208 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2209 mpeg1_vdpau_decoder_deps="vdpau"
2210 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2211 mpeg1_vdpau_hwaccel_deps="vdpau"
2212 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2213 mpeg1_xvmc_hwaccel_deps="xvmc"
2214 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2215 mpeg2_crystalhd_decoder_select="crystalhd"
2216 mpeg2_dxva2_hwaccel_deps="dxva2"
2217 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2218 mpeg2_vaapi_hwaccel_deps="vaapi"
2219 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2220 mpeg2_vdpau_hwaccel_deps="vdpau"
2221 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2222 mpeg2_xvmc_hwaccel_deps="xvmc"
2223 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2224 mpeg4_crystalhd_decoder_select="crystalhd"
2225 mpeg4_vaapi_hwaccel_deps="vaapi"
2226 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2227 mpeg4_vdpau_decoder_deps="vdpau"
2228 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2229 mpeg4_vdpau_hwaccel_deps="vdpau"
2230 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2231 msmpeg4_crystalhd_decoder_select="crystalhd"
2232 vc1_crystalhd_decoder_select="crystalhd"
2233 vc1_dxva2_hwaccel_deps="dxva2"
2234 vc1_dxva2_hwaccel_select="vc1_decoder"
2235 vc1_vaapi_hwaccel_deps="vaapi"
2236 vc1_vaapi_hwaccel_select="vc1_decoder"
2237 vc1_vdpau_decoder_deps="vdpau"
2238 vc1_vdpau_decoder_select="vc1_decoder"
2239 vc1_vdpau_hwaccel_deps="vdpau"
2240 vc1_vdpau_hwaccel_select="vc1_decoder"
2241 wmv3_crystalhd_decoder_select="crystalhd"
2242 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2243 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2244 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2245 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2246
2247 # parsers
2248 h264_parser_select="h264_decoder"
2249 hevc_parser_select="hevc_decoder"
2250 mpeg4video_parser_select="error_resilience h263dsp mpegvideo"
2251 mpegvideo_parser_select="error_resilience mpegvideo"
2252 vc1_parser_select="mpegvideo"
2253
2254 # external libraries
2255 libaacplus_encoder_deps="libaacplus"
2256 libcelt_decoder_deps="libcelt"
2257 libfaac_encoder_deps="libfaac"
2258 libfaac_encoder_select="audio_frame_queue"
2259 libfdk_aac_decoder_deps="libfdk_aac"
2260 libfdk_aac_encoder_deps="libfdk_aac"
2261 libfdk_aac_encoder_select="audio_frame_queue"
2262 libgme_demuxer_deps="libgme"
2263 libgsm_decoder_deps="libgsm"
2264 libgsm_encoder_deps="libgsm"
2265 libgsm_ms_decoder_deps="libgsm"
2266 libgsm_ms_encoder_deps="libgsm"
2267 libilbc_decoder_deps="libilbc"
2268 libilbc_encoder_deps="libilbc"
2269 libmodplug_demuxer_deps="libmodplug"
2270 libmp3lame_encoder_deps="libmp3lame"
2271 libmp3lame_encoder_select="audio_frame_queue"
2272 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2273 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2274 libopencore_amrnb_encoder_select="audio_frame_queue"
2275 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2276 libopenjpeg_decoder_deps="libopenjpeg"
2277 libopenjpeg_encoder_deps="libopenjpeg"
2278 libopus_decoder_deps="libopus"
2279 libopus_encoder_deps="libopus"
2280 libopus_encoder_select="audio_frame_queue"
2281 libquvi_demuxer_deps="libquvi"
2282 libschroedinger_decoder_deps="libschroedinger"
2283 libschroedinger_encoder_deps="libschroedinger"
2284 libshine_encoder_deps="libshine"
2285 libshine_encoder_select="audio_frame_queue"
2286 libspeex_decoder_deps="libspeex"
2287 libspeex_encoder_deps="libspeex"
2288 libspeex_encoder_select="audio_frame_queue"
2289 libstagefright_h264_decoder_deps="libstagefright_h264"
2290 libtheora_encoder_deps="libtheora"
2291 libtwolame_encoder_deps="libtwolame"
2292 libvo_aacenc_encoder_deps="libvo_aacenc"
2293 libvo_aacenc_encoder_select="audio_frame_queue"
2294 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2295 libvorbis_decoder_deps="libvorbis"
2296 libvorbis_encoder_deps="libvorbis"
2297 libvorbis_encoder_select="audio_frame_queue"
2298 libvpx_vp8_decoder_deps="libvpx"
2299 libvpx_vp8_encoder_deps="libvpx"
2300 libvpx_vp9_decoder_deps="libvpx"
2301 libvpx_vp9_encoder_deps="libvpx"
2302 libwavpack_encoder_deps="libwavpack"
2303 libwebp_encoder_deps="libwebp"
2304 libx264_encoder_deps="libx264"
2305 libx264rgb_encoder_deps="libx264"
2306 libx265_encoder_deps="libx265"
2307 libxavs_encoder_deps="libxavs"
2308 libxvid_encoder_deps="libxvid"
2309 libutvideo_decoder_deps="libutvideo"
2310 libutvideo_encoder_deps="libutvideo"
2311 libzvbi_teletext_decoder_deps="libzvbi"
2312
2313 # demuxers / muxers
2314 ac3_demuxer_select="ac3_parser"
2315 asf_demuxer_select="riffdec"
2316 asf_muxer_select="riffenc"
2317 asf_stream_muxer_select="asf_muxer"
2318 avi_demuxer_select="riffdec exif"
2319 avi_muxer_select="riffenc"
2320 avisynth_demuxer_deps="avisynth"
2321 avisynth_demuxer_select="riffdec"
2322 caf_demuxer_select="riffdec"
2323 dirac_demuxer_select="dirac_parser"
2324 dts_demuxer_select="dca_parser"
2325 dtshd_demuxer_select="dca_parser"
2326 dxa_demuxer_select="riffdec"
2327 eac3_demuxer_select="ac3_parser"
2328 f4v_muxer_select="mov_muxer"
2329 flac_demuxer_select="flac_parser"
2330 hds_muxer_select="flv_muxer"
2331 hls_muxer_select="mpegts_muxer"
2332 image2_alias_pix_demuxer_select="image2_demuxer"
2333 image2_brender_pix_demuxer_select="image2_demuxer"
2334 ipod_muxer_select="mov_muxer"
2335 ismv_muxer_select="mov_muxer"
2336 libnut_demuxer_deps="libnut"
2337 libnut_muxer_deps="libnut"
2338 matroska_audio_muxer_select="matroska_muxer"
2339 matroska_demuxer_select="riffdec"
2340 matroska_demuxer_suggest="bzlib lzo zlib"
2341 matroska_muxer_select="riffenc"
2342 mmf_muxer_select="riffenc"
2343 mov_demuxer_select="riffdec"
2344 mov_demuxer_suggest="zlib"
2345 mov_muxer_select="riffenc rtpenc_chain"
2346 mp3_demuxer_select="mpegaudio_parser"
2347 mp4_muxer_select="mov_muxer"
2348 mpegts_muxer_select="adts_muxer latm_muxer"
2349 mpegtsraw_demuxer_select="mpegts_demuxer"
2350 mxf_d10_muxer_select="mxf_muxer"
2351 nut_muxer_select="riffenc"
2352 nuv_demuxer_select="riffdec"
2353 ogg_demuxer_select="golomb"
2354 psp_muxer_select="mov_muxer"
2355 rtp_demuxer_select="sdp_demuxer"
2356 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2357 rtsp_demuxer_select="http_protocol rtpdec"
2358 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2359 sap_demuxer_select="sdp_demuxer"
2360 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2361 sdp_demuxer_select="rtpdec"
2362 smoothstreaming_muxer_select="ismv_muxer"
2363 spdif_muxer_select="aac_parser"
2364 tak_demuxer_select="tak_parser"
2365 tg2_muxer_select="mov_muxer"
2366 tgp_muxer_select="mov_muxer"
2367 vobsub_demuxer_select="mpegps_demuxer"
2368 w64_demuxer_select="wav_demuxer"
2369 w64_muxer_select="wav_muxer"
2370 wav_demuxer_select="riffdec"
2371 wav_muxer_select="riffenc"
2372 webm_muxer_select="riffenc"
2373 wtv_demuxer_select="riffdec"
2374 wtv_muxer_select="riffenc"
2375 xmv_demuxer_select="riffdec"
2376 xwma_demuxer_select="riffdec"
2377
2378 # indevs / outdevs
2379 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2380 alsa_outdev_deps="alsa_asoundlib_h"
2381 avfoundation_indev_extralibs="-framework CoreVideo -framework Foundation -framework AVFoundation -framework CoreMedia"
2382 avfoundation_indev_select="avfoundation"
2383 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2384 caca_outdev_deps="libcaca"
2385 decklink_outdev_deps="decklink pthreads"
2386 decklink_outdev_extralibs="-lstdc++"
2387 dshow_indev_deps="IBaseFilter"
2388 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
2389 dv1394_indev_deps="dv1394"
2390 dv1394_indev_select="dv_demuxer"
2391 fbdev_indev_deps="linux_fb_h"
2392 fbdev_outdev_deps="linux_fb_h"
2393 gdigrab_indev_deps="CreateDIBSection"
2394 gdigrab_indev_extralibs="-lgdi32"
2395 gdigrab_indev_select="bmp_decoder"
2396 iec61883_indev_deps="libiec61883"
2397 jack_indev_deps="jack_jack_h sem_timedwait"
2398 lavfi_indev_deps="avfilter"
2399 libcdio_indev_deps="libcdio"
2400 libdc1394_indev_deps="libdc1394"
2401 libv4l2_indev_deps="libv4l2"
2402 openal_indev_deps="openal"
2403 opengl_outdev_deps="opengl"
2404 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2405 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2406 pulse_indev_deps="libpulse"
2407 pulse_outdev_deps="libpulse"
2408 qtkit_indev_extralibs="-framework QTKit -framework Foundation -framework QuartzCore"
2409 qtkit_indev_select="qtkit"
2410 sdl_outdev_deps="sdl"
2411 sndio_indev_deps="sndio_h"
2412 sndio_outdev_deps="sndio_h"
2413 v4l_indev_deps="linux_videodev_h"
2414 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2415 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2416 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2417 vfwcap_indev_extralibs="-lavicap32"
2418 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2419 xv_outdev_extralibs="-lXv -lX11 -lXext"
2420 x11grab_indev_deps="x11grab"
2421
2422 # protocols
2423 bluray_protocol_deps="libbluray"
2424 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2425 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2426 ffrtmpcrypt_protocol_select="tcp_protocol"
2427 ffrtmphttp_protocol_deps="!librtmp_protocol"
2428 ffrtmphttp_protocol_select="http_protocol"
2429 ftp_protocol_select="tcp_protocol"
2430 gopher_protocol_select="network"
2431 http_protocol_select="tcp_protocol"
2432 httpproxy_protocol_select="tcp_protocol"
2433 https_protocol_select="tls_protocol"
2434 librtmp_protocol_deps="librtmp"
2435 librtmpe_protocol_deps="librtmp"
2436 librtmps_protocol_deps="librtmp"
2437 librtmpt_protocol_deps="librtmp"
2438 librtmpte_protocol_deps="librtmp"
2439 libssh_protocol_deps="libssh"
2440 mmsh_protocol_select="http_protocol"
2441 mmst_protocol_select="network"
2442 rtmp_protocol_deps="!librtmp_protocol"
2443 rtmp_protocol_select="tcp_protocol"
2444 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2445 rtmps_protocol_deps="!librtmp_protocol"
2446 rtmps_protocol_select="tls_protocol"
2447 rtmpt_protocol_select="ffrtmphttp_protocol"
2448 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2449 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2450 rtp_protocol_select="udp_protocol"
2451 sctp_protocol_deps="struct_sctp_event_subscribe"
2452 sctp_protocol_select="network"
2453 srtp_protocol_select="rtp_protocol"
2454 tcp_protocol_select="network"
2455 tls_protocol_deps_any="openssl gnutls"
2456 tls_protocol_select="tcp_protocol"
2457 udp_protocol_select="network"
2458 unix_protocol_deps="sys_un_h"
2459 unix_protocol_select="network"
2460
2461 # filters
2462 aconvert_filter_deps="swresample"
2463 amovie_filter_deps="avcodec avformat"
2464 aresample_filter_deps="swresample"
2465 ass_filter_deps="libass"
2466 asyncts_filter_deps="avresample"
2467 atempo_filter_deps="avcodec"
2468 atempo_filter_select="rdft"
2469 azmq_filter_deps="libzmq"
2470 blackframe_filter_deps="gpl"
2471 boxblur_filter_deps="gpl"
2472 bs2b_filter_deps="libbs2b"
2473 colormatrix_filter_deps="gpl"
2474 cropdetect_filter_deps="gpl"
2475 dctdnoiz_filter_deps="avcodec"
2476 dctdnoiz_filter_select="dct"
2477 delogo_filter_deps="gpl"
2478 deshake_filter_deps="avcodec"
2479 deshake_filter_select="dsputil"
2480 drawtext_filter_deps="libfreetype"
2481 ebur128_filter_deps="gpl"
2482 flite_filter_deps="libflite"
2483 frei0r_filter_deps="frei0r dlopen"
2484 frei0r_filter_extralibs='$ldl'
2485 frei0r_src_filter_deps="frei0r dlopen"
2486 frei0r_src_filter_extralibs='$ldl'
2487 geq_filter_deps="gpl"
2488 histeq_filter_deps="gpl"
2489 hqdn3d_filter_deps="gpl"
2490 interlace_filter_deps="gpl"
2491 kerndeint_filter_deps="gpl"
2492 ladspa_filter_deps="ladspa dlopen"
2493 mcdeint_filter_deps="avcodec gpl"
2494 movie_filter_deps="avcodec avformat"
2495 mp_filter_deps="gpl avcodec swscale inline_asm"
2496 mpdecimate_filter_deps="gpl avcodec"
2497 mptestsrc_filter_deps="gpl"
2498 negate_filter_deps="lut_filter"
2499 perspective_filter_deps="gpl"
2500 ocv_filter_deps="libopencv"
2501 owdenoise_filter_deps="gpl"
2502 pan_filter_deps="swresample"
2503 phase_filter_deps="gpl"
2504 pp_filter_deps="gpl postproc"
2505 pullup_filter_deps="gpl"
2506 removelogo_filter_deps="avcodec avformat swscale"
2507 resample_filter_deps="avresample"
2508 sab_filter_deps="gpl swscale"
2509 scale_filter_deps="swscale"
2510 smartblur_filter_deps="gpl swscale"
2511 showspectrum_filter_deps="avcodec"
2512 showspectrum_filter_select="rdft"
2513 spp_filter_deps="gpl avcodec"
2514 spp_filter_select="fft"
2515 stereo3d_filter_deps="gpl"
2516 subtitles_filter_deps="avformat avcodec libass"
2517 super2xsai_filter_deps="gpl"
2518 tinterlace_filter_deps="gpl"
2519 vidstabdetect_filter_deps="libvidstab"
2520 vidstabtransform_filter_deps="libvidstab"
2521 pixfmts_super2xsai_test_deps="super2xsai_filter"
2522 tinterlace_merge_test_deps="tinterlace_filter"
2523 tinterlace_pad_test_deps="tinterlace_filter"
2524 zmq_filter_deps="libzmq"
2525
2526 # examples
2527 avio_reading="avformat avcodec avutil"
2528 avcodec_example_deps="avcodec avutil"
2529 demuxing_decoding_example_deps="avcodec avformat avutil"
2530 filter_audio_example_deps="avfilter avutil"
2531 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2532 filtering_video_example_deps="avfilter avcodec avformat avutil"
2533 metadata_example_deps="avformat avutil"
2534 muxing_example_deps="avcodec avformat avutil swscale"
2535 remuxing_example_deps="avcodec avformat avutil"
2536 resampling_audio_example_deps="avutil swresample"
2537 scaling_video_example_deps="avutil swscale"
2538 transcode_aac_example_deps="avcodec avformat swresample"
2539 transcoding_example_deps="avfilter avcodec avformat avutil"
2540
2541 # libraries
2542 avcodec_deps="avutil"
2543 avdevice_deps="avutil avcodec avformat"
2544 avfilter_deps="avutil"
2545 avformat_deps="avutil avcodec"
2546 avresample_deps="avutil"
2547 postproc_deps="avutil gpl"
2548 swscale_deps="avutil"
2549
2550 # programs
2551 ffmpeg_deps="avcodec avfilter avformat swresample"
2552 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2553                null_filter
2554                setpts_filter trim_filter"
2555 ffplay_deps="avcodec avformat swscale swresample sdl"
2556 ffplay_libs='$sdl_libs'
2557 ffplay_select="rdft crop_filter"
2558 ffprobe_deps="avcodec avformat"
2559 ffserver_deps="avformat fork sarestart"
2560 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2561
2562 # documentation
2563 podpages_deps="perl"
2564 manpages_deps="perl pod2man"
2565 htmlpages_deps="perl texi2html"
2566 txtpages_deps="perl makeinfo"
2567 doc_deps_any="manpages htmlpages podpages txtpages"
2568
2569 # default parameters
2570
2571 logfile="config.log"
2572
2573 # installation paths
2574 prefix_default="/usr/local"
2575 bindir_default='${prefix}/bin'
2576 datadir_default='${prefix}/share/ffmpeg'
2577 docdir_default='${prefix}/share/doc/ffmpeg'
2578 incdir_default='${prefix}/include'
2579 libdir_default='${prefix}/lib'
2580 mandir_default='${prefix}/share/man'
2581 shlibdir_default="$libdir_default"
2582
2583 # toolchain
2584 ar_default="ar"
2585 cc_default="gcc"
2586 cxx_default="g++"
2587 host_cc_default="gcc"
2588 cp_f="cp -f"
2589 install="install"
2590 ln_s="ln -s -f"
2591 nm_default="nm -g"
2592 objformat="elf"
2593 pkg_config_default=pkg-config
2594 ranlib_default="ranlib"
2595 strip_default="strip"
2596 yasmexe_default="yasm"
2597 windres_default="windres"
2598
2599 nogas=":"
2600
2601 # OS
2602 target_os_default=$(tolower $(uname -s))
2603 host_os=$target_os_default
2604
2605 # machine
2606 if test "$target_os_default" = aix; then
2607     arch_default=$(uname -p)
2608 else
2609     arch_default=$(uname -m)
2610 fi
2611 cpu="generic"
2612
2613 # configurable options
2614 enable $PROGRAM_LIST
2615 enable $DOCUMENT_LIST
2616 enable $EXAMPLE_LIST
2617 enable $(filter_out avresample $LIBRARY_LIST)
2618 enable stripping
2619
2620 enable asm
2621 enable debug
2622 enable doc
2623 enable optimizations
2624 enable runtime_cpudetect
2625 enable safe_bitstream_reader
2626 enable static
2627 enable swscale_alpha
2628
2629 # Enable hwaccels by default.
2630 enable dxva2 vaapi vda vdpau xvmc
2631 enable xlib
2632
2633 # build settings
2634 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2635 LIBPREF="lib"
2636 LIBSUF=".a"
2637 FULLNAME='$(NAME)$(BUILDSUF)'
2638 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2639 SLIBPREF="lib"
2640 SLIBSUF=".so"
2641 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2642 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2643 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2644 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2645 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2646 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2647
2648 asflags_filter=echo
2649 cflags_filter=echo
2650 ldflags_filter=echo
2651
2652 AS_C='-c'
2653 AS_O='-o $@'
2654 CC_C='-c'
2655 CC_E='-E -o $@'
2656 CC_O='-o $@'
2657 CXX_C='-c'
2658 CXX_O='-o $@'
2659 LD_O='-o $@'
2660 LD_LIB='-l%'
2661 LD_PATH='-L'
2662 HOSTCC_C='-c'
2663 HOSTCC_E='-E -o $@'
2664 HOSTCC_O='-o $@'
2665 HOSTLD_O='-o $@'
2666
2667 host_libs='-lm'
2668 host_cflags_filter=echo
2669 host_ldflags_filter=echo
2670
2671 target_path='$(CURDIR)'
2672
2673 # since the object filename is not given with the -MM flag, the compiler
2674 # is only able to print the basename, and we must add the path ourselves
2675 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2676 DEPFLAGS='-MM'
2677
2678 # find source path
2679 if test -f configure; then
2680     source_path=.
2681 else
2682     source_path=$(cd $(dirname "$0"); pwd)
2683     echo "$source_path" | grep -q '[[:blank:]]' &&
2684         die "Out of tree builds are impossible with whitespace in source path."
2685     test -e "$source_path/config.h" &&
2686         die "Out of tree builds are impossible with config.h in source dir."
2687 fi
2688
2689 for v in "$@"; do
2690     r=${v#*=}
2691     l=${v%"$r"}
2692     r=$(sh_quote "$r")
2693     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2694 done
2695
2696 find_things(){
2697     thing=$1
2698     pattern=$2
2699     file=$source_path/$3
2700     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2701 }
2702
2703 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2704 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2705 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2706 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2707 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2708 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2709 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2710 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2711 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2712 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2713 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2714
2715 ALL_COMPONENTS="
2716     $BSF_LIST
2717     $DECODER_LIST
2718     $DEMUXER_LIST
2719     $ENCODER_LIST
2720     $FILTER_LIST
2721     $HWACCEL_LIST
2722     $INDEV_LIST
2723     $MUXER_LIST
2724     $OUTDEV_LIST
2725     $PARSER_LIST
2726     $PROTOCOL_LIST
2727 "
2728
2729 for n in $COMPONENT_LIST; do
2730     v=$(toupper ${n%s})_LIST
2731     eval enable \$$v
2732     eval ${n}_if_any="\$$v"
2733 done
2734
2735 enable $ARCH_EXT_LIST
2736
2737 die_unknown(){
2738     echo "Unknown option \"$1\"."
2739     echo "See $0 --help for available options."
2740     exit 1
2741 }
2742
2743 print_3_columns() {
2744     cat | tr ' ' '\n' | sort | pr -r -3 -t
2745 }
2746
2747 show_list() {
2748     suffix=_$1
2749     shift
2750     echo $* | sed s/$suffix//g | print_3_columns
2751     exit 0
2752 }
2753
2754 rand_list(){
2755     IFS=', '
2756     set -- $*
2757     unset IFS
2758     for thing; do
2759         comp=${thing%:*}
2760         prob=${thing#$comp}
2761         prob=${prob#:}
2762         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2763         echo "prob ${prob:-0.5}"
2764         printf '%s\n' $comp
2765     done
2766 }
2767
2768 do_random(){
2769     action=$1
2770     shift
2771     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2772     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2773 }
2774
2775 for opt do
2776     optval="${opt#*=}"
2777     case "$opt" in
2778         --extra-ldflags=*)
2779             add_ldflags $optval
2780         ;;
2781         --extra-libs=*)
2782             add_extralibs $optval
2783         ;;
2784         --disable-devices)
2785             disable $INDEV_LIST $OUTDEV_LIST
2786         ;;
2787         --enable-debug=*)
2788             debuglevel="$optval"
2789         ;;
2790         --disable-programs)
2791             disable $PROGRAM_LIST
2792         ;;
2793         --disable-everything)
2794             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2795         ;;
2796         --disable-all)
2797             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2798             disable $LIBRARY_LIST $PROGRAM_LIST doc
2799         ;;
2800         --enable-random|--disable-random)
2801             action=${opt%%-random}
2802             do_random ${action#--} $COMPONENT_LIST
2803         ;;
2804         --enable-random=*|--disable-random=*)
2805             action=${opt%%-random=*}
2806             do_random ${action#--} $optval
2807         ;;
2808         --enable-*=*|--disable-*=*)
2809             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2810             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2811             eval list=\$$(toupper $thing)_LIST
2812             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2813             list=$(filter "$name" $list)
2814             [ "$list" = "" ] && warn "Option $opt did not match anything"
2815             $action $list
2816         ;;
2817         --enable-?*|--disable-?*)
2818             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2819             if is_in $option $COMPONENT_LIST; then
2820                 test $action = disable && action=unset
2821                 eval $action \$$(toupper ${option%s})_LIST
2822             elif is_in $option $CMDLINE_SELECT; then
2823                 $action $option
2824             else
2825                 die_unknown $opt
2826             fi
2827         ;;
2828         --list-*)
2829             NAME="${opt#--list-}"
2830             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2831             NAME=${NAME%s}
2832             eval show_list $NAME \$$(toupper $NAME)_LIST
2833         ;;
2834         --help|-h) show_help
2835         ;;
2836         --fatal-warnings) enable fatal_warnings
2837         ;;
2838         *)
2839             optname="${opt%%=*}"
2840             optname="${optname#--}"
2841             optname=$(echo "$optname" | sed 's/-/_/g')
2842             if is_in $optname $CMDLINE_SET; then
2843                 eval $optname='$optval'
2844             elif is_in $optname $CMDLINE_APPEND; then
2845                 append $optname "$optval"
2846             else
2847                 die_unknown $opt
2848             fi
2849         ;;
2850     esac
2851 done
2852
2853 disabled logging && logfile=/dev/null
2854
2855 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2856 set >> $logfile
2857
2858 test -n "$cross_prefix" && enable cross_compile
2859
2860 if enabled cross_compile; then
2861     test -n "$arch" && test -n "$target_os" ||
2862         die "Must specify target arch and OS when cross-compiling"
2863 fi
2864
2865 ar_default="${cross_prefix}${ar_default}"
2866 cc_default="${cross_prefix}${cc_default}"
2867 cxx_default="${cross_prefix}${cxx_default}"
2868 nm_default="${cross_prefix}${nm_default}"
2869 pkg_config_default="${cross_prefix}${pkg_config_default}"
2870 ranlib_default="${cross_prefix}${ranlib_default}"
2871 strip_default="${cross_prefix}${strip_default}"
2872 windres_default="${cross_prefix}${windres_default}"
2873
2874 sysinclude_default="${sysroot}/usr/include"
2875
2876 test -n "$valgrind" && toolchain="valgrind-memcheck"
2877
2878 case "$toolchain" in
2879     clang-asan)
2880         cc_default="clang"
2881         add_cflags  -fsanitize=address
2882         add_ldflags -fsanitize=address
2883     ;;
2884     clang-tsan)
2885         cc_default="clang"
2886         add_cflags  -fsanitize=thread -pie
2887         add_ldflags -fsanitize=thread -pie
2888     ;;
2889     clang-usan)
2890         cc_default="clang"
2891         add_cflags  -fsanitize=undefined
2892         add_ldflags -fsanitize=undefined
2893     ;;
2894     gcc-asan)
2895         cc_default="gcc"
2896         add_cflags  -fsanitize=address
2897         add_ldflags -fsanitize=address
2898     ;;
2899     gcc-tsan)
2900         cc_default="gcc"
2901         add_cflags  -fsanitize=thread -pie -fPIC
2902         add_ldflags -fsanitize=thread -pie -fPIC
2903     ;;
2904     gcc-usan)
2905         cc_default="gcc"
2906         add_cflags  -fsanitize=undefined
2907         add_ldflags -fsanitize=undefined
2908     ;;
2909     valgrind-massif)
2910         target_exec_default=${valgrind:-"valgrind"}
2911         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"
2912     ;;
2913     valgrind-memcheck)
2914         target_exec_default=${valgrind:-"valgrind"}
2915         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
2916     ;;
2917     msvc)
2918         # Check whether the current MSVC version needs the C99 converter.
2919         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2920         # support enough of C99 to build ffmpeg. Default to the new
2921         # behaviour if the regexp was unable to match anything, since this
2922         # successfully parses the version number of existing supported
2923         # versions that require the converter (MSVC 2010 and 2012).
2924         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2925         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2926             cc_default="cl"
2927         else
2928             cc_default="c99wrap cl"
2929         fi
2930         ld_default="link"
2931         nm_default="dumpbin -symbols"
2932         ar_default="lib"
2933         target_os_default="win32"
2934         # Use a relative path for TMPDIR. This makes sure all the
2935         # ffconf temp files are written with a relative path, avoiding
2936         # issues with msys/win32 path conversion for MSVC parameters
2937         # such as -Fo<file> or -out:<file>.
2938         TMPDIR=.
2939     ;;
2940     icl)
2941         cc_default="icl"
2942         ld_default="xilink"
2943         nm_default="dumpbin -symbols"
2944         ar_default="xilib"
2945         target_os_default="win32"
2946         TMPDIR=.
2947     ;;
2948     gcov)
2949         add_cflags  -fprofile-arcs -ftest-coverage
2950         add_ldflags -fprofile-arcs -ftest-coverage
2951     ;;
2952     hardened)
2953         add_cflags  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2954         add_ldflags -Wl,-z,relro -Wl,-z,now
2955     ;;
2956     ?*)
2957         die "Unknown toolchain $toolchain"
2958     ;;
2959 esac
2960
2961 set_default arch cc cxx pkg_config ranlib strip sysinclude target_exec target_os yasmexe
2962 enabled cross_compile || host_cc_default=$cc
2963 set_default host_cc
2964
2965 if ! $pkg_config --version >/dev/null 2>&1; then
2966     warn "$pkg_config not found, library detection may fail."
2967     pkg_config=false
2968 fi
2969
2970 exesuf() {
2971     case $1 in
2972         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2973     esac
2974 }
2975
2976 EXESUF=$(exesuf $target_os)
2977 HOSTEXESUF=$(exesuf $host_os)
2978
2979 # set temporary file name
2980 : ${TMPDIR:=$TEMPDIR}
2981 : ${TMPDIR:=$TMP}
2982 : ${TMPDIR:=/tmp}
2983
2984 if [ -n "$tempprefix" ] ; then
2985     mktemp(){
2986         echo $tempprefix.${HOSTNAME}.${UID}
2987     }
2988 elif ! check_cmd mktemp -u XXXXXX; then
2989     # simple replacement for missing mktemp
2990     # NOT SAFE FOR GENERAL USE
2991     mktemp(){
2992         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2993     }
2994 fi
2995
2996 tmpfile(){
2997     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2998         (set -C; exec > $tmp) 2>/dev/null ||
2999         die "Unable to create temporary file in $TMPDIR."
3000     append TMPFILES $tmp
3001     eval $1=$tmp
3002 }
3003
3004 trap 'rm -f -- $TMPFILES' EXIT
3005
3006 tmpfile TMPASM .asm
3007 tmpfile TMPC   .c
3008 tmpfile TMPCPP .cpp
3009 tmpfile TMPE   $EXESUF
3010 tmpfile TMPH   .h
3011 tmpfile TMPM   .m
3012 tmpfile TMPO   .o
3013 tmpfile TMPS   .S
3014 tmpfile TMPSH  .sh
3015 tmpfile TMPV   .ver
3016
3017 unset -f mktemp
3018
3019 chmod +x $TMPE
3020
3021 # make sure we can execute files in $TMPDIR
3022 cat > $TMPSH 2>> $logfile <<EOF
3023 #! /bin/sh
3024 EOF
3025 chmod +x $TMPSH >> $logfile 2>&1
3026 if ! $TMPSH >> $logfile 2>&1; then
3027     cat <<EOF
3028 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3029 variable to another directory and make sure that it is not mounted noexec.
3030 EOF
3031     die "Sanity test failed."
3032 fi
3033
3034 ccc_flags(){
3035     for flag; do
3036         case $flag in
3037             -std=c99)           echo -c99                       ;;
3038             -mcpu=*)            echo -arch ${flag#*=}           ;;
3039             -mieee)             echo -ieee                      ;;
3040             -O*|-fast)          echo $flag                      ;;
3041             -fno-math-errno)    echo -assume nomath_errno       ;;
3042             -g)                 echo -g3                        ;;
3043             -Wall)              echo -msg_enable level2         ;;
3044             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3045             -Wl,*)              echo $flag                      ;;
3046             -f*|-W*)                                            ;;
3047             *)                  echo $flag                      ;;
3048         esac
3049    done
3050 }
3051
3052 cparser_flags(){
3053     for flag; do
3054         case $flag in
3055             -Wno-switch)             echo -Wno-switch-enum ;;
3056             -Wno-format-zero-length) ;;
3057             -Wdisabled-optimization) ;;
3058             -Wno-pointer-sign)       echo -Wno-other ;;
3059             *)                       echo $flag ;;
3060         esac
3061     done
3062 }
3063
3064 msvc_common_flags(){
3065     for flag; do
3066         case $flag in
3067             # In addition to specifying certain flags under the compiler
3068             # specific filters, they must be specified here as well or else the
3069             # generic catch all at the bottom will print the original flag.
3070             -Wall)                ;;
3071             -std=c99)             ;;
3072             # Common flags
3073             -fomit-frame-pointer) ;;
3074             -g)                   echo -Z7 ;;
3075             -fno-math-errno)      ;;
3076             -fno-common)          ;;
3077             -fno-signed-zeros)    ;;
3078             -fPIC)                ;;
3079             -mthumb)              ;;
3080             -march=*)             ;;
3081             -lz)                  echo zlib.lib ;;
3082             -lavifil32)           echo vfw32.lib ;;
3083             -lavicap32)           echo vfw32.lib user32.lib ;;
3084             -l*)                  echo ${flag#-l}.lib ;;
3085             *)                    echo $flag ;;
3086         esac
3087     done
3088 }
3089
3090 msvc_flags(){
3091     msvc_common_flags "$@"
3092     for flag; do
3093         case $flag in
3094             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3095                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3096                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3097                                        -wd4554 \
3098                                        -wd4273 ;;
3099         esac
3100     done
3101 }
3102
3103 icl_flags(){
3104     msvc_common_flags "$@"
3105     for flag; do
3106         case $flag in
3107             # Despite what Intel's documentation says -Wall, which is supported
3108             # on Windows, does enable remarks so disable them here.
3109             -Wall)                echo $flag -Qdiag-disable:remark ;;
3110             -std=c99)             echo -Qstd=c99 ;;
3111         esac
3112     done
3113 }
3114
3115 icc_flags(){
3116     for flag; do
3117         case $flag in
3118             -flto)                echo -ipo ;;
3119             *)                    echo $flag ;;
3120         esac
3121     done
3122 }
3123
3124 pgi_flags(){
3125     for flag; do
3126         case $flag in
3127             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3128             -fomit-frame-pointer) echo -Mnoframe ;;
3129             -g)                   echo -gopt ;;
3130             *)                    echo $flag ;;
3131         esac
3132     done
3133 }
3134
3135 suncc_flags(){
3136     for flag; do
3137         case $flag in
3138             -march=*|-mcpu=*)
3139                 case "${flag#*=}" in
3140                     native)                   echo -xtarget=native       ;;
3141                     v9|niagara)               echo -xarch=sparc          ;;
3142                     ultrasparc)               echo -xarch=sparcvis       ;;
3143                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3144                     i586|pentium)             echo -xchip=pentium        ;;
3145                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3146                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3147                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3148                     pentium4*)          echo -xtarget=pentium4           ;;
3149                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3150                     *-sse3)             echo -xarch=sse3                 ;;
3151                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3152                     bonnell)                   echo -xarch=ssse3         ;;
3153                     corei7|nehalem)            echo -xtarget=nehalem     ;;
3154                     westmere)                  echo -xtarget=westmere    ;;
3155                     silvermont)                echo -xarch=sse4_2        ;;
3156                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
3157                     core-avx*|ivybridge|haswell|broadwell)
3158                                                echo -xarch=avx           ;;
3159                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
3160                     btver1)                    echo -xarch=amdsse4a      ;;
3161                     btver2|bdver*)             echo -xarch=avx           ;;
3162                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3163                     k8|opteron|athlon64|athlon-fx)
3164                                                echo -xarch=sse2a         ;;
3165                     athlon*)                   echo -xarch=pentium_proa  ;;
3166                 esac
3167                 ;;
3168             -std=c99)             echo -xc99              ;;
3169             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3170             -fPIC)                echo -KPIC -xcode=pic32 ;;
3171             -W*,*)                echo $flag              ;;
3172             -f*-*|-W*|-mimpure-text)                      ;;
3173             -shared)              echo -G                 ;;
3174             *)                    echo $flag              ;;
3175         esac
3176     done
3177 }
3178
3179 tms470_flags(){
3180     for flag; do
3181         case $flag in
3182             -march=*|-mcpu=*)
3183                 case "${flag#*=}" in
3184                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3185                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3186                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3187                     armv6*|arm11*)          echo -mv=6   ;;
3188                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3189                                             echo -mv=5e  ;;
3190                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3191                 esac
3192                 ;;
3193             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3194             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3195             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3196             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3197             -msoft-float)   echo --float_support=vfplib       ;;
3198             -O[0-3]|-mf=*)  echo $flag                        ;;
3199             -g)             echo -g -mn                       ;;
3200             -pds=*)         echo $flag                        ;;
3201             -D*|-I*)        echo $flag                        ;;
3202             --gcc|--abi=*)  echo $flag                        ;;
3203             -me)            echo $flag                        ;;
3204         esac
3205     done
3206 }
3207
3208 probe_cc(){
3209     pfx=$1
3210     _cc=$2
3211
3212     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3213     unset _ld_o _ldflags _ld_lib _ld_path
3214     unset _depflags _DEPCMD _DEPFLAGS
3215     _flags_filter=echo
3216
3217     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3218         true # no-op to avoid reading stdin in following checks
3219     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3220         _type=llvm_gcc
3221         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
3222         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
3223         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3224         _cflags_speed='-O3'
3225         _cflags_size='-Os'
3226     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3227         _type=gcc
3228         gcc_version=$($_cc --version | head -n1)
3229         gcc_basever=$($_cc -dumpversion)
3230         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3231         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3232         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3233         if ! $_cc -dumpversion | grep -q '^2\.'; then
3234             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3235         fi
3236         _cflags_speed='-O3'
3237         _cflags_size='-Os'
3238     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3239         _type=icc
3240         _ident=$($_cc --version | head -n1)
3241         _depflags='-MMD'
3242         _cflags_speed='-O3'
3243         _cflags_size='-Os'
3244         _cflags_noopt='-O1'
3245         _flags_filter=icc_flags
3246     elif $_cc -v 2>&1 | grep -q xlc; then
3247         _type=xlc
3248         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3249         _cflags_speed='-O5'
3250         _cflags_size='-O5 -qcompact'
3251     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3252         _type=ccc
3253         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3254         _DEPFLAGS='-M'
3255         _cflags_speed='-fast'
3256         _cflags_size='-O1'
3257         _flags_filter=ccc_flags
3258     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3259         test -d "$sysroot" || die "No valid sysroot specified."
3260         _type=armcc
3261         _ident=$($_cc --vsn | head -n1 | sed 's/.*: //')
3262         armcc_conf="$PWD/armcc.conf"
3263         $_cc --arm_linux_configure                 \
3264              --arm_linux_config_file="$armcc_conf" \
3265              --configure_sysroot="$sysroot"        \
3266              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3267              die "Error creating armcc configuration file."
3268         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3269         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3270         as_default="${cross_prefix}gcc"
3271         _depflags='-MMD'
3272         _cflags_speed='-O3'
3273         _cflags_size='-Os'
3274     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3275         _type=tms470
3276         _ident=$($_cc -version | head -n1 | tr -s ' ')
3277         _flags='--gcc --abi=eabi -me'
3278         _cc_e='-ppl -fe=$@'
3279         _cc_o='-fe=$@'
3280         _depflags='-ppa -ppd=$(@:.o=.d)'
3281         _cflags_speed='-O3 -mf=5'
3282         _cflags_size='-O3 -mf=2'
3283         _flags_filter=tms470_flags
3284     elif $_cc -v 2>&1 | grep -q clang; then
3285         _type=clang
3286         _ident=$($_cc --version | head -n1)
3287         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3288         _cflags_speed='-O3'
3289         _cflags_size='-Os'
3290     elif $_cc -V 2>&1 | grep -q Sun; then
3291         _type=suncc
3292         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3293         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3294         _DEPFLAGS='-xM1 -xc99'
3295         _ldflags='-std=c99'
3296         _cflags_speed='-O5'
3297         _cflags_size='-O5 -xspace'
3298         _flags_filter=suncc_flags
3299     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3300         _type=pathscale
3301         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3302         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3303         _cflags_speed='-O2'
3304         _cflags_size='-Os'
3305         _flags_filter='filter_out -Wdisabled-optimization'
3306     elif $_cc -v 2>&1 | grep -q Open64; then
3307         _type=open64
3308         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3309         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3310         _cflags_speed='-O2'
3311         _cflags_size='-Os'
3312         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3313     elif $_cc -V 2>&1 | grep -q Portland; then
3314         _type=pgi
3315         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3316         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3317         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3318         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3319         _cflags_noopt="-O"
3320         _flags_filter=pgi_flags
3321     elif $_cc 2>&1 | grep -q Microsoft; then
3322         _type=msvc
3323         _ident=$($cc 2>&1 | head -n1)
3324         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3325         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3326         _cflags_speed="-O2"
3327         _cflags_size="-O1"
3328         if $_cc 2>&1 | grep -q Linker; then
3329             _ld_o='-out:$@'
3330         else
3331             _ld_o='-Fe$@'
3332         fi
3333         _cc_o='-Fo$@'
3334         _cc_e='-P -Fi$@'
3335         _flags_filter=msvc_flags
3336         _ld_lib='lib%.a'
3337         _ld_path='-libpath:'
3338         _flags='-nologo'
3339         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3340         if [ $pfx = hostcc ]; then
3341             append _cflags -Dsnprintf=_snprintf
3342         fi
3343         disable stripping
3344     elif $_cc 2>&1 | grep -q Intel; then
3345         _type=icl
3346         _ident=$($cc 2>&1 | head -n1)
3347         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3348         # Not only is O3 broken on 13.x+ but it is slower on all previous
3349         # versions (tested) as well.
3350         _cflags_speed="-O2"
3351         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3352         if $_cc 2>&1 | grep -q Linker; then
3353             _ld_o='-out:$@'
3354         else
3355             _ld_o='-Fe$@'
3356         fi
3357         _cc_o='-Fo$@'
3358         _cc_e='-P'
3359         _flags_filter=icl_flags
3360         _ld_lib='lib%.a'
3361         _ld_path='-libpath:'
3362         # -Qdiag-error to make icl error when seeing certain unknown arguments
3363         _flags='-nologo -Qdiag-error:4044,10157'
3364         # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
3365         # with MSVC which enables it by default.
3366         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS -fp:precise'
3367         if [ $pfx = hostcc ]; then
3368             append _cflags -Dsnprintf=_snprintf
3369         fi
3370     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3371         _type=cparser
3372         _ident=$($_cc --version | head -n1)
3373         _depflags='-MMD'
3374         _cflags_speed='-O4'
3375         _cflags_size='-O2'
3376         _flags_filter=cparser_flags
3377     fi
3378
3379     eval ${pfx}_type=\$_type
3380     eval ${pfx}_ident=\$_ident
3381 }
3382
3383 set_ccvars(){
3384     eval ${1}_C=\${_cc_c-\${${1}_C}}
3385     eval ${1}_E=\${_cc_e-\${${1}_E}}
3386     eval ${1}_O=\${_cc_o-\${${1}_O}}
3387
3388     if [ -n "$_depflags" ]; then
3389         eval ${1}_DEPFLAGS=\$_depflags
3390     else
3391         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3392         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3393         eval DEP${1}FLAGS=\$_flags
3394     fi
3395 }
3396
3397 probe_cc cc "$cc"
3398 cflags_filter=$_flags_filter
3399 cflags_speed=$_cflags_speed
3400 cflags_size=$_cflags_size
3401 cflags_noopt=$_cflags_noopt
3402 add_cflags $_flags $_cflags
3403 cc_ldflags=$_ldflags
3404 set_ccvars CC
3405
3406 probe_cc hostcc "$host_cc"
3407 host_cflags_filter=$_flags_filter
3408 add_host_cflags  $_flags $_cflags
3409 set_ccvars HOSTCC
3410
3411 test -n "$cc_type" && enable $cc_type ||
3412     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3413
3414 : ${as_default:=$cc}
3415 : ${dep_cc_default:=$cc}
3416 : ${ld_default:=$cc}
3417 : ${host_ld_default:=$host_cc}
3418 set_default ar as dep_cc ld host_ld windres
3419
3420 probe_cc as "$as"
3421 asflags_filter=$_flags_filter
3422 add_asflags $_flags $_cflags
3423 set_ccvars AS
3424
3425 probe_cc ld "$ld"
3426 ldflags_filter=$_flags_filter
3427 add_ldflags $_flags $_ldflags
3428 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3429 LD_O=${_ld_o-$LD_O}
3430 LD_LIB=${_ld_lib-$LD_LIB}
3431 LD_PATH=${_ld_path-$LD_PATH}
3432
3433 probe_cc hostld "$host_ld"
3434 host_ldflags_filter=$_flags_filter
3435 add_host_ldflags $_flags $_ldflags
3436 HOSTLD_O=${_ld_o-$HOSTLD_O}
3437
3438 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3439     probe_cc depcc "$dep_cc"
3440     CCDEP=${_DEPCMD:-$DEPCMD}
3441     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3442     DEPCCFLAGS=$_flags
3443 fi
3444
3445 if $ar 2>&1 | grep -q Microsoft; then
3446     arflags="-nologo"
3447     ar_o='-out:$@'
3448 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3449     arflags="rq"
3450     ar_o='$@'
3451 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3452     arflags='-Xany -r -c'
3453     ar_o='$@'
3454 else
3455     arflags="rc"
3456     ar_o='$@'
3457 fi
3458
3459 add_cflags $extra_cflags
3460 add_cxxflags $extra_cxxflags
3461 add_asflags $extra_cflags
3462
3463 if test -n "$sysroot"; then
3464     case "$cc_type" in
3465         gcc|llvm_gcc|clang)
3466             add_cppflags --sysroot="$sysroot"
3467             add_ldflags --sysroot="$sysroot"
3468 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
3469             add_cppflags -isysroot "$sysroot"
3470             add_ldflags -isysroot "$sysroot"
3471         ;;
3472         tms470)
3473             add_cppflags -I"$sysinclude"
3474             add_ldflags  --sysroot="$sysroot"
3475         ;;
3476     esac
3477 fi
3478
3479 if test "$cpu" = host; then
3480     enabled cross_compile &&
3481         die "--cpu=host makes no sense when cross-compiling."
3482
3483     case "$cc_type" in
3484         gcc|llvm_gcc)
3485             check_native(){
3486                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3487                 sed -n "/cc1.*$1=/{
3488                             s/.*$1=\\([^ ]*\\).*/\\1/
3489                             p
3490                             q
3491                         }" $TMPE
3492             }
3493             cpu=$(check_native -march || check_native -mcpu)
3494         ;;
3495     esac
3496
3497     test "${cpu:-host}" = host &&
3498         die "--cpu=host not supported with compiler $cc"
3499 fi
3500
3501 # Deal with common $arch aliases
3502 case "$arch" in
3503     aarch64|arm64)
3504         arch="aarch64"
3505     ;;
3506     arm*|iPad*|iPhone*)
3507         arch="arm"
3508     ;;
3509     mips*|IP*)
3510         arch="mips"
3511     ;;
3512     parisc*|hppa*)
3513         arch="parisc"
3514     ;;
3515     "Power Macintosh"|ppc*|powerpc*)
3516         arch="ppc"
3517     ;;
3518     s390|s390x)
3519         arch="s390"
3520     ;;
3521     sh4|sh)
3522         arch="sh4"
3523     ;;
3524     sun4u|sparc*)
3525         arch="sparc"
3526     ;;
3527     tilegx|tile-gx)
3528         arch="tilegx"
3529     ;;
3530     i[3-6]86|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3531         arch="x86"
3532     ;;
3533 esac
3534
3535 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3536 enable $arch
3537
3538 # Add processor-specific flags
3539 if enabled aarch64; then
3540
3541     case $cpu in
3542         armv*)
3543             cpuflags="-march=$cpu"
3544         ;;
3545         *)
3546             cpuflags="-mcpu=$cpu"
3547         ;;
3548     esac
3549
3550 elif enabled alpha; then
3551
3552     cpuflags="-mcpu=$cpu"
3553
3554 elif enabled arm; then
3555
3556     check_arm_arch() {
3557         check_cpp_condition stddef.h \
3558             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3559             $cpuflags
3560     }
3561
3562     probe_arm_arch() {
3563         if   check_arm_arch 4;        then echo armv4;
3564         elif check_arm_arch 4T;       then echo armv4t;
3565         elif check_arm_arch 5;        then echo armv5;
3566         elif check_arm_arch 5E;       then echo armv5e;
3567         elif check_arm_arch 5T;       then echo armv5t;
3568         elif check_arm_arch 5TE;      then echo armv5te;
3569         elif check_arm_arch 5TEJ;     then echo armv5te;
3570         elif check_arm_arch 6;        then echo armv6;
3571         elif check_arm_arch 6J;       then echo armv6j;
3572         elif check_arm_arch 6K;       then echo armv6k;
3573         elif check_arm_arch 6Z;       then echo armv6z;
3574         elif check_arm_arch 6ZK;      then echo armv6zk;
3575         elif check_arm_arch 6T2;      then echo armv6t2;
3576         elif check_arm_arch 7;        then echo armv7;
3577         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3578         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3579         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3580         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3581         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3582         fi
3583     }
3584
3585     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3586
3587     case $cpu in
3588         armv*)
3589             cpuflags="-march=$cpu"
3590             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3591         ;;
3592         *)
3593             cpuflags="-mcpu=$cpu"
3594             case $cpu in
3595                 cortex-a*)                               subarch=armv7a  ;;
3596                 cortex-r*)                               subarch=armv7r  ;;
3597                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3598                 arm11*)                                  subarch=armv6   ;;
3599                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3600                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3601                 *)                             subarch=$(probe_arm_arch) ;;
3602             esac
3603         ;;
3604     esac
3605
3606     case "$subarch" in
3607         armv5t*)    enable fast_clz                ;;
3608         armv[6-8]*) enable fast_clz fast_unaligned ;;
3609     esac
3610
3611 elif enabled avr32; then
3612
3613     case $cpu in
3614         ap7[02]0[0-2])
3615             subarch="avr32_ap"
3616             cpuflags="-mpart=$cpu"
3617         ;;
3618         ap)
3619             subarch="avr32_ap"
3620             cpuflags="-march=$cpu"
3621         ;;
3622         uc3[ab]*)
3623             subarch="avr32_uc"
3624             cpuflags="-mcpu=$cpu"
3625         ;;
3626         uc)
3627             subarch="avr32_uc"
3628             cpuflags="-march=$cpu"
3629         ;;
3630     esac
3631
3632 elif enabled bfin; then
3633
3634     cpuflags="-mcpu=$cpu"
3635
3636 elif enabled mips; then
3637
3638     cpuflags="-march=$cpu"
3639
3640     case $cpu in
3641         24kc)
3642             disable mipsfpu
3643             disable mipsdspr1
3644             disable mipsdspr2
3645         ;;
3646         24kf*)
3647             disable mipsdspr1
3648             disable mipsdspr2
3649         ;;
3650         24kec|34kc|1004kc)
3651             disable mipsfpu
3652             disable mipsdspr2
3653         ;;
3654         24kef*|34kf*|1004kf*)
3655             disable mipsdspr2
3656         ;;
3657         74kc)
3658             disable mipsfpu
3659         ;;
3660     esac
3661
3662 elif enabled ppc; then
3663
3664     disable ldbrx
3665
3666     case $(tolower $cpu) in
3667         601|ppc601|powerpc601)
3668             cpuflags="-mcpu=601"
3669             disable altivec
3670         ;;
3671         603*|ppc603*|powerpc603*)
3672             cpuflags="-mcpu=603"
3673             disable altivec
3674         ;;
3675         604*|ppc604*|powerpc604*)
3676             cpuflags="-mcpu=604"
3677             disable altivec
3678         ;;
3679         g3|75*|ppc75*|powerpc75*)
3680             cpuflags="-mcpu=750"
3681             disable altivec
3682         ;;
3683         g4|745*|ppc745*|powerpc745*)
3684             cpuflags="-mcpu=7450"
3685         ;;
3686         74*|ppc74*|powerpc74*)
3687             cpuflags="-mcpu=7400"
3688         ;;
3689         g5|970|ppc970|powerpc970)
3690             cpuflags="-mcpu=970"
3691         ;;
3692         power[3-7]*)
3693             cpuflags="-mcpu=$cpu"
3694         ;;
3695         cell)
3696             cpuflags="-mcpu=cell"
3697             enable ldbrx
3698         ;;
3699         e500mc)
3700             cpuflags="-mcpu=e500mc"
3701             disable altivec
3702         ;;
3703         e500v2)
3704             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3705             disable altivec
3706             disable dcbzl
3707         ;;
3708         e500)
3709             cpuflags="-mcpu=8540 -mhard-float"
3710             disable altivec
3711             disable dcbzl
3712         ;;
3713     esac
3714
3715 elif enabled sparc; then
3716
3717     case $cpu in
3718         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3719             cpuflags="-mcpu=$cpu"
3720         ;;
3721         ultrasparc*|niagara[234])
3722             cpuflags="-mcpu=$cpu"
3723         ;;
3724     esac
3725
3726 elif enabled x86; then
3727
3728     case $cpu in
3729         i[345]86|pentium)
3730             cpuflags="-march=$cpu"
3731             disable mmx
3732         ;;
3733         # targets that do NOT support nopl and conditional mov (cmov)
3734         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3735             cpuflags="-march=$cpu"
3736             disable i686
3737         ;;
3738         # targets that do support nopl and conditional mov (cmov)
3739         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
3740         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|amdfam10|barcelona|b[dt]ver*)
3741             cpuflags="-march=$cpu"
3742             enable i686
3743             enable fast_cmov
3744         ;;
3745         # targets that do support conditional mov but on which it's slow
3746         pentium4|pentium4m|prescott|nocona)
3747             cpuflags="-march=$cpu"
3748             enable i686
3749             disable fast_cmov
3750         ;;
3751     esac
3752
3753 fi
3754
3755 if [ "$cpu" != generic ]; then
3756     add_cflags  $cpuflags
3757     add_asflags $cpuflags
3758 fi
3759
3760 # compiler sanity check
3761 check_exec <<EOF
3762 int main(void){ return 0; }
3763 EOF
3764 if test "$?" != 0; then
3765     echo "$cc is unable to create an executable file."
3766     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3767         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3768         echo "Only do this if you know what cross compiling means."
3769     fi
3770     die "C compiler test failed."
3771 fi
3772
3773 add_cppflags -D_ISOC99_SOURCE
3774 add_cxxflags -D__STDC_CONSTANT_MACROS
3775 check_cflags -std=c99
3776 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3777 #include <stdlib.h>
3778 EOF
3779 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3780 #include <stdlib.h>
3781 EOF
3782
3783 add_host_cppflags -D_ISOC99_SOURCE
3784 check_host_cflags -std=c99
3785 check_host_cflags -Wall
3786 check_host_cflags -O3
3787
3788 check_64bit(){
3789     arch32=$1
3790     arch64=$2
3791     expr=$3
3792     check_code cc "" "int test[2*($expr) - 1]" &&
3793         subarch=$arch64 || subarch=$arch32
3794 }
3795
3796 case "$arch" in
3797     aarch64|alpha|ia64)
3798         spic=$shared
3799     ;;
3800     mips)
3801         check_64bit mips mips64 '_MIPS_SIM > 1'
3802         spic=$shared
3803     ;;
3804     parisc)
3805         check_64bit parisc parisc64 'sizeof(void *) > 4'
3806         spic=$shared
3807     ;;
3808     ppc)
3809         check_64bit ppc ppc64 'sizeof(void *) > 4'
3810         spic=$shared
3811     ;;
3812     s390)
3813         check_64bit s390 s390x 'sizeof(void *) > 4'
3814         spic=$shared
3815     ;;
3816     sparc)
3817         check_64bit sparc sparc64 'sizeof(void *) > 4'
3818         spic=$shared
3819     ;;
3820     x86)
3821         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3822         if test "$subarch" = "x86_64"; then
3823             spic=$shared
3824         fi
3825     ;;
3826     ppc)
3827         check_cc <<EOF && subarch="ppc64"
3828         int test[(int)sizeof(char*) - 7];
3829 EOF
3830     ;;
3831 esac
3832
3833 enable $subarch
3834 enabled spic && enable_weak pic
3835
3836 # OS specific
3837 case $target_os in
3838     aix)
3839         SHFLAGS=-shared
3840         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3841         enabled shared && add_ldflags -Wl,-brtl
3842         ;;
3843     haiku)
3844         prefix_default="/boot/common"
3845         network_extralibs="-lnetwork"
3846         host_libs=
3847         ;;
3848     sunos)
3849         SHFLAGS='-shared -Wl,-h,$$(@F)'
3850         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3851         network_extralibs="-lsocket -lnsl"
3852         # When using suncc to build, the Solaris linker will mark
3853         # an executable with each instruction set encountered by
3854         # the Solaris assembler.  As our libraries contain their own
3855         # guards for processor-specific code, instead suppress
3856         # generation of the HWCAPS ELF section on Solaris x86 only.
3857         enabled_all suncc x86 &&
3858             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3859             add_ldflags -Wl,-M,mapfile
3860         nm_default='nm -P -g'
3861         ;;
3862     netbsd)
3863         disable symver
3864         oss_indev_extralibs="-lossaudio"
3865         oss_outdev_extralibs="-lossaudio"
3866         enabled gcc || check_ldflags -Wl,-zmuldefs
3867         ;;
3868     openbsd|bitrig)
3869         disable symver
3870         SHFLAGS='-shared'
3871         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3872         SLIB_INSTALL_LINKS=
3873         oss_indev_extralibs="-lossaudio"
3874         oss_outdev_extralibs="-lossaudio"
3875         ;;
3876     dragonfly)
3877         disable symver
3878         ;;
3879     freebsd)
3880         ;;
3881     bsd/os)
3882         add_extralibs -lpoll -lgnugetopt
3883         strip="strip -d"
3884         ;;
3885     darwin)
3886         test "${as#*gas-preprocessor.pl}" != "$as" || gas="${gas:=gas-preprocessor.pl} ${as:=$cc}"
3887         enabled ppc && add_asflags -force_cpusubtype_ALL
3888         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3889         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3890         strip="${strip} -x"
3891         add_ldflags -Wl,-dynamic,-search_paths_first
3892         SLIBSUF=".dylib"
3893         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3894         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3895         objformat="macho"
3896         enabled x86_64 && objformat="macho64"
3897         enabled_any pic shared ||
3898             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3899         ;;
3900     mingw32*)
3901         if test $target_os = "mingw32ce"; then
3902             disable network
3903         else
3904             target_os=mingw32
3905         fi
3906         LIBTARGET=i386
3907         if enabled x86_64; then
3908             LIBTARGET="i386:x86-64"
3909         elif enabled arm; then
3910             LIBTARGET=arm-wince
3911         fi
3912         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3913         check_ldflags -Wl,--nxcompat
3914         check_ldflags -Wl,--dynamicbase
3915         shlibdir_default="$bindir_default"
3916         SLIBPREF=""
3917         SLIBSUF=".dll"
3918         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3919         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3920         dlltool="${cross_prefix}dlltool"
3921         if check_cmd lib.exe -list; then
3922             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3923             if enabled x86_64; then
3924                 LIBTARGET=x64
3925             fi
3926         elif check_cmd $dlltool --version; then
3927             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3928         fi
3929         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3930         SLIB_INSTALL_LINKS=
3931         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3932         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3933         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3934         objformat="win32"
3935         ranlib=:
3936         enable dos_paths
3937         ;;
3938     win32|win64)
3939         disable symver
3940         if enabled shared; then
3941             # Link to the import library instead of the normal static library
3942             # for shared libs.
3943             LD_LIB='%.lib'
3944             # Cannot build both shared and static libs with MSVC or icl.
3945             disable static
3946         fi
3947         shlibdir_default="$bindir_default"
3948         SLIBPREF=""
3949         SLIBSUF=".dll"
3950         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3951         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3952         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3953         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3954         SLIB_INSTALL_LINKS=
3955         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3956         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3957         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3958         objformat="win32"
3959         ranlib=:
3960         enable dos_paths
3961         ;;
3962     cygwin*)
3963         target_os=cygwin
3964         shlibdir_default="$bindir_default"
3965         SLIBPREF="cyg"
3966         SLIBSUF=".dll"
3967         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3968         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3969         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3970         SLIB_INSTALL_LINKS=
3971         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3972         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3973         objformat="win32"
3974         enable dos_paths
3975         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3976         ;;
3977     *-dos|freedos|opendos)
3978         network_extralibs="-lsocket"
3979         objformat="coff"
3980         enable dos_paths
3981         add_cppflags -U__STRICT_ANSI__
3982         ;;
3983     linux)
3984         enable dv1394
3985         ;;
3986     irix*)
3987         target_os=irix
3988         ranlib="echo ignoring ranlib"
3989         ;;
3990     os/2*)
3991         strip="lxlite -CS"
3992         ln_s="cp -f"
3993         objformat="aout"
3994         add_cppflags -D_GNU_SOURCE
3995         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3996         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3997         LIBSUF="_s.a"
3998         SLIBPREF=""
3999         SLIBSUF=".dll"
4000         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4001         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4002         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4003             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
4004             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4005             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4006             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4007             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
4008         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4009             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4010         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4011         enable dos_paths
4012         enable_weak os2threads
4013         ;;
4014     gnu/kfreebsd)
4015         add_cppflags -D_BSD_SOURCE
4016         ;;
4017     gnu)
4018         ;;
4019     qnx)
4020         add_cppflags -D_QNX_SOURCE
4021         network_extralibs="-lsocket"
4022         ;;
4023     symbian)
4024         SLIBSUF=".dll"
4025         enable dos_paths
4026         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4027         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4028         add_ldflags -Wl,--target1-abs,--no-undefined \
4029                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4030                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4031         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4032                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4033                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4034         ;;
4035     osf1)
4036         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4037         ;;
4038     minix)
4039         ;;
4040     plan9)
4041         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
4042                      -D_REENTRANT_SOURCE        \
4043                      -D_RESEARCH_SOURCE         \
4044                      -DFD_SETSIZE=96            \
4045                      -DHAVE_SOCK_OPTS
4046         add_compat strtod.o strtod=avpriv_strtod
4047         network_extralibs='-lbsd'
4048         exeobjs=compat/plan9/main.o
4049         disable ffserver
4050         cp_f='cp'
4051         ;;
4052     none)
4053         ;;
4054     *)
4055         die "Unknown OS '$target_os'."
4056         ;;
4057 esac
4058
4059 # determine libc flavour
4060
4061 probe_libc(){
4062     pfx=$1
4063     pfx_no_=${pfx%_}
4064     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4065     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4066         eval ${pfx}libc_type=uclibc
4067         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4068     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4069         eval ${pfx}libc_type=glibc
4070         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4071     # MinGW headers can be installed on Cygwin, so check for newlib first.
4072     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4073         eval ${pfx}libc_type=newlib
4074         add_${pfx}cppflags -U__STRICT_ANSI__
4075     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4076     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4077         eval ${pfx}libc_type=mingw64
4078         if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
4079             add_compat msvcrt/snprintf.o
4080             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
4081         fi
4082         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4083         eval test \$${pfx_no_}cc_type = "gcc" &&
4084             add_${pfx}cppflags -D__printf__=__gnu_printf__
4085     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4086          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4087         eval ${pfx}libc_type=mingw32
4088         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4089             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4090             die "ERROR: MinGW32 runtime version must be >= 3.15."
4091         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4092         eval test \$${pfx_no_}cc_type = "gcc" &&
4093             add_${pfx}cppflags -D__printf__=__gnu_printf__
4094     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4095         eval ${pfx}libc_type=msvcrt
4096         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4097         # 0x601 by default unless something else is set by the user.
4098         # This can easily lead to us detecting functions only present
4099         # in such new versions and producing binaries requiring windows 7.0.
4100         # Therefore explicitly set the default to XP unless the user has
4101         # set something else on the command line.
4102         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4103             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4104     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4105         eval ${pfx}libc_type=klibc
4106     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4107         eval ${pfx}libc_type=bionic
4108     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4109         eval ${pfx}libc_type=solaris
4110         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4111     fi
4112 }
4113
4114 probe_libc
4115 test -n "$libc_type" && enable libc_$libc_type
4116 probe_libc host_
4117 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4118
4119 case $libc_type in
4120     bionic)
4121         add_compat strtod.o strtod=avpriv_strtod
4122         ;;
4123     msvcrt)
4124         add_compat strtod.o strtod=avpriv_strtod
4125         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4126                                      _snprintf=avpriv_snprintf  \
4127                                      vsnprintf=avpriv_vsnprintf
4128         ;;
4129 esac
4130
4131 # hacks for compiler/libc/os combinations
4132
4133 if enabled_all tms470 libc_glibc; then
4134     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4135     add_cppflags -D__USER_LABEL_PREFIX__=
4136     add_cppflags -D__builtin_memset=memset
4137     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4138     add_cflags   -pds=48    # incompatible redefinition of macro
4139 fi
4140
4141 if enabled_all ccc libc_glibc; then
4142     add_ldflags -Wl,-z,now  # calls to libots crash without this
4143 fi
4144
4145 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4146     add_cppflags '-I\$(SRC_PATH)/compat/float'
4147
4148 esc(){
4149     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4150 }
4151
4152 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
4153
4154 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4155
4156 set_default $PATHS_LIST
4157 set_default nm
4158
4159 # we need to build at least one lib type
4160 if ! enabled_any static shared; then
4161     cat <<EOF
4162 At least one library type must be built.
4163 Specify --enable-static to build the static libraries or --enable-shared to
4164 build the shared libraries as well. To only build the shared libraries specify
4165 --disable-static in addition to --enable-shared.
4166 EOF
4167     exit 1;
4168 fi
4169
4170 die_license_disabled() {
4171     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4172 }
4173
4174 die_license_disabled_gpl() {
4175     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
4176 }
4177
4178 die_license_disabled gpl frei0r
4179 die_license_disabled gpl libcdio
4180 die_license_disabled gpl libutvideo
4181 die_license_disabled gpl libvidstab
4182 die_license_disabled gpl libx264
4183 die_license_disabled gpl libx265
4184 die_license_disabled gpl libxavs
4185 die_license_disabled gpl libxvid
4186 die_license_disabled gpl libzvbi
4187 die_license_disabled gpl x11grab
4188
4189 die_license_disabled nonfree libaacplus
4190 die_license_disabled nonfree libfaac
4191 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
4192 enabled gpl && die_license_disabled_gpl nonfree openssl
4193
4194 die_license_disabled version3 libopencore_amrnb
4195 die_license_disabled version3 libopencore_amrwb
4196 die_license_disabled version3 libvo_aacenc
4197 die_license_disabled version3 libvo_amrwbenc
4198
4199 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4200
4201 disabled optimizations || check_cflags -fomit-frame-pointer
4202
4203 enable_weak_pic() {
4204     disabled pic && return
4205     enable pic
4206     add_cppflags -DPIC
4207     case "$target_os" in
4208     mingw*|cygwin*)
4209         ;;
4210     *)
4211         add_cflags -fPIC
4212         ;;
4213     esac
4214     add_asflags  -fPIC
4215 }
4216
4217 enabled pic && enable_weak_pic
4218
4219 check_cc <<EOF || die "Symbol mangling check failed."
4220 int ff_extern;
4221 EOF
4222 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4223 extern_prefix=${sym%%ff_extern*}
4224
4225 check_cc <<EOF && enable_weak inline_asm
4226 void foo(void) { __asm__ volatile ("" ::); }
4227 EOF
4228
4229 _restrict=
4230 for restrict_keyword in restrict __restrict__ __restrict; do
4231     check_cc <<EOF && _restrict=$restrict_keyword && break
4232 void foo(char * $restrict_keyword p);
4233 EOF
4234 done
4235
4236 check_cc <<EOF && enable pragma_deprecated
4237 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4238 EOF
4239
4240 check_cc <<EOF && enable attribute_packed
4241 struct { int x; } __attribute__((packed)) x;
4242 EOF
4243
4244 check_cc <<EOF && enable attribute_may_alias
4245 union { int x; } __attribute__((may_alias)) x;
4246 EOF
4247
4248 check_cc <<EOF || die "endian test failed"
4249 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4250 EOF
4251 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4252
4253 check_inline_asm inline_asm_labels '"1:\n"'
4254
4255 check_inline_asm inline_asm_nonlocal_labels '"Label:\n"'
4256
4257 if enabled aarch64; then
4258     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4259     # internal assembler in clang 3.3 does not support this instruction
4260     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4261     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4262
4263     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4264
4265 elif enabled alpha; then
4266
4267     check_cflags -mieee
4268
4269 elif enabled arm; then
4270
4271     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
4272 float func(float a, float b){ return a+b; }
4273 EOF
4274
4275     enabled thumb && check_cflags -mthumb || check_cflags -marm
4276     nogas=die
4277
4278     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4279         enable vfp_args
4280     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
4281         case "${cross_prefix:-$cc}" in
4282             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4283             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4284 __asm__ (".eabi_attribute 28, 1");
4285 int main(void) { return 0; }
4286 EOF
4287         esac
4288         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4289     fi
4290
4291     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4292     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4293     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4294     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4295     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4296     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4297
4298     [ $target_os = linux ] ||
4299         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4300             $ARCH_EXT_LIST_ARM
4301
4302     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4303
4304     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4305
4306 elif enabled mips; then
4307
4308     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4309     enabled mips32r2  && add_cflags "-mips32r2" && add_asflags "-mips32r2" &&
4310      check_inline_asm mips32r2  '"rotr $t0, $t1, 1"'
4311     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
4312      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
4313     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
4314      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
4315     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
4316      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
4317
4318 elif enabled parisc; then
4319
4320     if enabled gcc; then
4321         case $($cc -dumpversion) in
4322             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4323         esac
4324     fi
4325
4326 elif enabled ppc; then
4327
4328     enable local_aligned_8 local_aligned_16 local_aligned_32
4329
4330     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4331     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4332     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4333     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4334
4335     # AltiVec flags: The FSF version of GCC differs from the Apple version
4336     if enabled altivec; then
4337         if ! enabled_any pic ppc64; then
4338             nogas=warn
4339         fi
4340         check_cflags -maltivec -mabi=altivec &&
4341         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4342         check_cflags -faltivec
4343
4344         # check if our compiler supports Motorola AltiVec C API
4345         check_cc <<EOF || disable altivec
4346 $inc_altivec_h
4347 int main(void) {
4348     vector signed int v1 = (vector signed int) { 0 };
4349     vector signed int v2 = (vector signed int) { 1 };
4350     v1 = vec_add(v1, v2);
4351     return 0;
4352 }
4353 EOF
4354
4355         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4356     fi
4357
4358 elif enabled x86; then
4359
4360     check_builtin rdtsc    intrin.h   "__rdtsc()"
4361     check_builtin mm_empty mmintrin.h "_mm_empty()"
4362
4363     enable local_aligned_8 local_aligned_16 local_aligned_32
4364
4365     # check whether EBP is available on x86
4366     # As 'i' is stored on the stack, this program will crash
4367     # if the base pointer is used to access it because the
4368     # base pointer is cleared in the inline assembly code.
4369     check_exec_crash <<EOF && enable ebp_available
4370 volatile int i=0;
4371 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4372 return i;
4373 EOF
4374
4375     # check whether EBX is available on x86
4376     check_inline_asm ebx_available '""::"b"(0)' &&
4377         check_inline_asm ebx_available '"":::"%ebx"'
4378
4379     # check whether xmm clobbers are supported
4380     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4381
4382     check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test, %eax"' ||
4383         check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test(%rip), %eax"'
4384
4385     # check whether binutils is new enough to compile SSSE3/MMXEXT
4386     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4387     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4388
4389     if ! disabled_any asm mmx yasm; then
4390         if check_cmd $yasmexe --version; then
4391             enabled x86_64 && yasm_extra="-m amd64"
4392             yasm_debug="-g dwarf2"
4393         elif check_cmd nasm -v; then
4394             yasmexe=nasm
4395             yasm_debug="-g -F dwarf"
4396             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4397         fi
4398
4399         YASMFLAGS="-f $objformat $yasm_extra"
4400         enabled pic               && append YASMFLAGS "-DPIC"
4401         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4402         case "$objformat" in
4403             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4404         esac
4405
4406         check_yasm "movbe ecx, [5]" && enable yasm ||
4407             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4408         check_yasm "vextractf128 xmm0, ymm0, 0"      || disable avx_external avresample
4409         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4410         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4411         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4412         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4413         check_yasm "CPU amdnop" || disable cpunop
4414     fi
4415
4416     case "$cpu" in
4417         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4418             disable fast_clz
4419         ;;
4420     esac
4421
4422 fi
4423
4424 if enabled asm; then
4425     as=${gas:=$as}
4426     check_as <<EOF && enable gnu_as || \
4427         $nogas "GNU assembler not found, install gas-preprocessor"
4428 .macro m n
4429 \n: .int 0
4430 .endm
4431 m x
4432 EOF
4433 fi
4434
4435 check_ldflags -Wl,--as-needed
4436
4437 if check_func dlopen; then
4438     ldl=
4439 elif check_func dlopen -ldl; then
4440     ldl=-ldl
4441 fi
4442
4443 if ! disabled network; then
4444     check_func getaddrinfo $network_extralibs
4445     check_func getservbyport $network_extralibs
4446     check_func inet_aton $network_extralibs
4447
4448     check_type netdb.h "struct addrinfo"
4449     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4450     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4451     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4452     check_type poll.h "struct pollfd"
4453     check_type netinet/sctp.h "struct sctp_event_subscribe"
4454     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4455     check_type netinet/in.h "struct sockaddr_in6"
4456     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4457     check_type "sys/types.h sys/socket.h" socklen_t
4458
4459     # Prefer arpa/inet.h over winsock2
4460     if check_header arpa/inet.h ; then
4461         check_func closesocket
4462     elif check_header winsock2.h ; then
4463         check_func_headers winsock2.h closesocket -lws2 &&
4464             network_extralibs="-lws2" ||
4465         { check_func_headers winsock2.h closesocket -lws2_32 &&
4466             network_extralibs="-lws2_32"; } || disable winsock2_h network
4467         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4468
4469         check_type ws2tcpip.h socklen_t
4470         check_type ws2tcpip.h "struct addrinfo"
4471         check_type ws2tcpip.h "struct group_source_req"
4472         check_type ws2tcpip.h "struct ip_mreq_source"
4473         check_type ws2tcpip.h "struct ipv6_mreq"
4474         check_type winsock2.h "struct pollfd"
4475         check_struct winsock2.h "struct sockaddr" sa_len
4476         check_type ws2tcpip.h "struct sockaddr_in6"
4477         check_type ws2tcpip.h "struct sockaddr_storage"
4478     else
4479         disable network
4480     fi
4481 fi
4482
4483 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4484 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4485 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4486 check_builtin sarestart signal.h "SA_RESTART"
4487 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4488
4489 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4490 check_func  ${malloc_prefix}memalign            && enable memalign
4491 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4492
4493 check_func  access
4494 check_func  clock_gettime || { check_func clock_gettime -lrt && add_extralibs -lrt; }
4495 check_func  fcntl
4496 check_func  fork
4497 check_func  gethrtime
4498 check_func  getopt
4499 check_func  getrusage
4500 check_func  gettimeofday
4501 check_func  isatty
4502 check_func  localtime_r
4503 check_func  mach_absolute_time
4504 check_func  mkstemp
4505 check_func  mmap
4506 check_func  mprotect
4507 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4508 check_func  nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
4509 check_func  sched_getaffinity
4510 check_func  setrlimit
4511 check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE
4512 check_func  strerror_r
4513 check_func  sysconf
4514 check_func  sysctl
4515 check_func  usleep
4516
4517 check_func_headers conio.h kbhit
4518 check_func_headers io.h setmode
4519 check_func_headers lzo/lzo1x.h lzo1x_999_compress
4520 check_func_headers stdlib.h getenv
4521
4522 check_func_headers windows.h CoTaskMemFree -lole32
4523 check_func_headers windows.h GetProcessAffinityMask
4524 check_func_headers windows.h GetProcessTimes
4525 check_func_headers windows.h GetSystemTimeAsFileTime
4526 check_func_headers windows.h MapViewOfFile
4527 check_func_headers windows.h PeekNamedPipe
4528 check_func_headers windows.h SetConsoleTextAttribute
4529 check_func_headers windows.h Sleep
4530 check_func_headers windows.h VirtualAlloc
4531 check_func_headers glob.h glob
4532 enabled xlib &&
4533     check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
4534
4535 check_header cl/cl.h
4536 check_header direct.h
4537 check_header dlfcn.h
4538 check_header dxva.h
4539 check_header dxva2api.h -D_WIN32_WINNT=0x0600
4540 check_header io.h
4541 check_header libcrystalhd/libcrystalhd_if.h
4542 check_header mach/mach_time.h
4543 check_header malloc.h
4544 check_header poll.h
4545 check_header sys/mman.h
4546 check_header sys/param.h
4547 check_header sys/resource.h
4548 check_header sys/select.h
4549 check_header sys/time.h
4550 check_header sys/un.h
4551 check_header termios.h
4552 check_header unistd.h
4553 check_header vdpau/vdpau.h
4554 check_header vdpau/vdpau_x11.h
4555 check_header VideoDecodeAcceleration/VDADecoder.h
4556 check_header windows.h
4557 check_header X11/extensions/XvMClib.h
4558 check_header asm/types.h
4559
4560 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4561 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4562 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4563
4564 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4565
4566 if ! disabled w32threads && ! enabled pthreads; then
4567     check_func_headers "windows.h process.h" _beginthreadex &&
4568         enable w32threads || disable w32threads
4569 fi
4570
4571 # check for some common methods of building with pthread support
4572 # do this before the optional library checks as some of them require pthreads
4573 if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
4574     enable pthreads
4575     if check_func pthread_join -pthread && check_func pthread_create -pthread; then
4576         add_cflags -pthread
4577         add_extralibs -pthread
4578     elif check_func pthread_join -pthreads && check_func pthread_create -pthreads; then
4579         add_cflags -pthreads
4580         add_extralibs -pthreads
4581     elif check_func pthread_join -lpthreadGC2 && check_func pthread_create -lpthreadGC2; then
4582         add_extralibs -lpthreadGC2
4583     elif check_lib pthread.h pthread_join -lpthread && check_lib pthread.h pthread_create -lpthread; then
4584         :
4585     elif ! check_func pthread_join && ! check_func pthread_create; then
4586         disable pthreads
4587     fi
4588     check_code cc "pthread.h" "static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER" || disable pthreads
4589 fi
4590
4591
4592 if enabled pthreads; then
4593   check_func pthread_cancel
4594 fi
4595
4596 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4597 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4598
4599 check_lib math.h sin -lm && LIBM="-lm"
4600 disabled crystalhd || check_lib libcrystalhd/libcrystalhd_if.h DtsCrystalHDVersion -lcrystalhd || disable crystalhd
4601
4602 atan2f_args=2
4603 ldexpf_args=2
4604 powf_args=2
4605
4606 for func in $MATH_FUNCS; do
4607     eval check_mathfunc $func \${${func}_args:-1}
4608 done
4609
4610 # these are off by default, so fail if requested and not available
4611 enabled avfoundation_indev && { check_header_oc AVFoundation/AVFoundation.h || disable avfoundation_indev; }
4612 enabled avisynth          && { { check_lib2 "windows.h" LoadLibrary; } ||
4613                                { check_lib2 "dlfcn.h" dlopen -ldl; } ||
4614                                die "ERROR: LoadLibrary/dlopen not found for avisynth"; }
4615 enabled decklink          && { check_header DeckLinkAPI.h || die "ERROR: DeckLinkAPI.h header not found"; }
4616 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4617 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4618 enabled ladspa            && { check_header ladspa.h || die "ERROR: ladspa.h header not found"; }
4619 enabled libiec61883       && require libiec61883 libiec61883/iec61883.h iec61883_cmp_connect -lraw1394 -lavc1394 -lrom1394 -liec61883
4620 enabled libaacplus        && require "libaacplus >= 2.0.0" aacplus.h aacplusEncOpen -laacplus
4621 enabled libass            && require_pkg_config libass ass/ass.h ass_library_init
4622 enabled libbluray         && require_pkg_config libbluray libbluray/bluray.h bd_open
4623 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4624 enabled libcelt           && require libcelt celt/celt.h celt_decode -lcelt0 &&
4625                              { check_lib celt/celt.h celt_decoder_create_custom -lcelt0 ||
4626                                die "ERROR: libcelt must be installed and version must be >= 0.11.0."; }
4627 enabled libcaca           && require_pkg_config caca caca.h caca_create_canvas
4628 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4629 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
4630 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"
4631 enabled libflite          && require2 libflite "flite/flite.h" flite_init $flite_libs
4632 enabled fontconfig        && enable libfontconfig
4633 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4634 enabled libfreetype       && require_libfreetype
4635 enabled libgme            && require  libgme gme/gme.h gme_new_emu -lgme -lstdc++
4636 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4637                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4638                                done || die "ERROR: libgsm not found"; }
4639 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4640 enabled libmodplug        && require libmodplug libmodplug/modplug.h ModPlug_Load -lmodplug
4641 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4642 enabled libnut            && require libnut libnut.h nut_demuxer_init -lnut
4643 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4644 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4645 enabled libopencv         && require_pkg_config opencv opencv/cxcore.h cvCreateImageHeader
4646 enabled libopenjpeg       && { check_lib openjpeg-1.5/openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4647                                check_lib openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4648                                die "ERROR: libopenjpeg not found"; }
4649 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4650 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4651 enabled libquvi           && require_pkg_config libquvi quvi/quvi.h quvi_init
4652 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4653 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4654 enabled libshine          && require_pkg_config shine shine/layer3.h shine_encode_buffer
4655 enabled libsoxr           && require libsoxr soxr.h soxr_create -lsoxr
4656 enabled libssh            && require_pkg_config libssh libssh/sftp.h sftp_init
4657 enabled libspeex          && require libspeex speex/speex.h speex_decoder_init -lspeex
4658 enabled libstagefright_h264 && require_cpp libstagefright_h264 "binder/ProcessState.h media/stagefright/MetaData.h
4659     media/stagefright/MediaBufferGroup.h media/stagefright/MediaDebug.h media/stagefright/MediaDefs.h
4660     media/stagefright/OMXClient.h media/stagefright/OMXCodec.h" android::OMXClient -lstagefright -lmedia -lutils -lbinder -lgnustl_static
4661 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4662 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame &&
4663                              { check_lib twolame.h twolame_encode_buffer_float32_interleaved -ltwolame ||
4664                                die "ERROR: libtwolame must be installed and version must be >= 0.3.10"; }
4665 enabled libutvideo        && require_cpp utvideo "stdint.h stdlib.h utvideo/utvideo.h utvideo/Codec.h" 'CCodec*' -lutvideo -lstdc++
4666 enabled libv4l2           && require_pkg_config libv4l2 libv4l2.h v4l2_ioctl
4667 enabled libvidstab        && require_pkg_config "vidstab >= 0.98" vid.stab/libvidstab.h vsMotionDetectInit
4668 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4669 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4670 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4671 enabled libvpx            && {
4672     enabled libvpx_vp8_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
4673                                     die "ERROR: libvpx decoder version must be >=0.9.1"; }
4674     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 ||
4675                                     die "ERROR: libvpx encoder version must be >=0.9.7"; }
4676     enabled libvpx_vp9_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx" -lvpx || disable libvpx_vp9_decoder; }
4677     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; } }
4678 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4679 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4680 enabled libx264           && require libx264 x264.h x264_encoder_encode -lx264 &&
4681                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4682                                die "ERROR: libx264 must be installed and version must be >= 0.118."; }
4683 enabled libx265           && require_pkg_config x265 x265.h x265_encoder_encode &&
4684                              { check_cpp_condition x265.h "X265_BUILD >= 13" ||
4685                                die "ERROR: libx265 version must be >= 13."; }
4686 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4687 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4688 enabled libzmq            && require_pkg_config libzmq zmq.h zmq_ctx_new
4689 enabled libzvbi           && require libzvbi libzvbi.h vbi_decoder_new -lzvbi
4690 enabled openal            && { { for al_libs in "${OPENAL_LIBS}" "-lopenal" "-lOpenAL32"; do
4691                                check_lib 'AL/al.h' alGetError "${al_libs}" && break; done } ||
4692                                die "ERROR: openal not found"; } &&
4693                              { check_cpp_condition "AL/al.h" "defined(AL_VERSION_1_1)" ||
4694                                die "ERROR: openal must be installed and version must be 1.1 or compatible"; }
4695 enabled opencl            && { check_lib2 OpenCL/cl.h clEnqueueNDRangeKernel -Wl,-framework,OpenCL ||
4696                                check_lib2 CL/cl.h clEnqueueNDRangeKernel -lOpenCL ||
4697                                die "ERROR: opencl not found"; } &&
4698                              { check_cpp_condition "OpenCL/cl.h" "defined(CL_VERSION_1_2)" ||
4699                                check_cpp_condition "CL/cl.h" "defined(CL_VERSION_1_2)" ||
4700                                die "ERROR: opencl must be installed and version must be 1.2 or compatible"; }
4701 enabled opengl            && { check_lib GL/glx.h glXGetProcAddress "-lGL" ||
4702                                check_lib2 windows.h wglGetProcAddress "-lopengl32 -lgdi32" ||
4703                                check_lib2 OpenGL/gl3.h glGetError "-Wl,-framework,OpenGL" ||
4704                                check_lib2 ES2/gl.h glGetError "-isysroot=${sysroot} -Wl,-framework,OpenGLES" ||
4705                                die "ERROR: opengl not found."
4706                              }
4707 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4708                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4709                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4710                                die "ERROR: openssl not found"; }
4711 enabled qtkit_indev      && { check_header_oc QTKit/QTKit.h || disable qtkit_indev; }
4712
4713 if enabled gnutls; then
4714     { check_lib nettle/bignum.h nettle_mpz_get_str_256 -lnettle -lhogweed -lgmp && enable nettle; } ||
4715     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4716 fi
4717
4718 # libdc1394 check
4719 if enabled libdc1394; then
4720     { check_lib dc1394/dc1394.h dc1394_new -ldc1394 -lraw1394 &&
4721         enable libdc1394_2; } ||
4722     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4723         enable libdc1394_1; } ||
4724     die "ERROR: No version of libdc1394 found "
4725 fi
4726
4727 SDL_CONFIG="${cross_prefix}sdl-config"
4728 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4729     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4730     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4731     enable sdl
4732 else
4733   if "${SDL_CONFIG}" --version > /dev/null 2>&1; then
4734     sdl_cflags=$("${SDL_CONFIG}" --cflags)
4735     sdl_libs=$("${SDL_CONFIG}" --libs)
4736     check_func_headers SDL_version.h SDL_Linked_Version $sdl_cflags $sdl_libs &&
4737     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4738     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4739     enable sdl
4740   fi
4741 fi
4742 enabled sdl && add_cflags $sdl_cflags && add_extralibs $sdl_libs
4743
4744 texi2html --help 2> /dev/null | grep -q 'init-file' && enable texi2html || disable texi2html
4745 makeinfo --version > /dev/null 2>&1 && enable makeinfo  || disable makeinfo
4746 perl -v            > /dev/null 2>&1 && enable perl      || disable perl
4747 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4748 rsync --help 2> /dev/null | grep -q 'contimeout' && enable rsync_contimeout || disable rsync_contimeout
4749
4750 check_header linux/fb.h
4751 check_header linux/videodev.h
4752 check_header linux/videodev2.h
4753 check_code cc linux/videodev2.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_safe struct_v4l2_frmivalenum_discrete
4754
4755 check_header sys/videoio.h
4756
4757 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4758 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4759 # w32api 3.12 had it defined wrong
4760 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4761
4762 check_type "dshow.h" IBaseFilter
4763
4764 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4765 { check_header dev/bktr/ioctl_meteor.h &&
4766   check_header dev/bktr/ioctl_bt848.h;&