configure: check for recent dxva2api headers with fixed COBJMACROS defines
[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_vdpau_decoder_deps="vdpau"
2200 h264_vdpau_decoder_select="h264_decoder"
2201 h264_vdpau_hwaccel_deps="vdpau"
2202 h264_vdpau_hwaccel_select="h264_decoder"
2203 mpeg_vdpau_decoder_deps="vdpau"
2204 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2205 mpeg_xvmc_hwaccel_deps="xvmc"
2206 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2207 mpeg1_vdpau_decoder_deps="vdpau"
2208 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2209 mpeg1_vdpau_hwaccel_deps="vdpau"
2210 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2211 mpeg1_xvmc_hwaccel_deps="xvmc"
2212 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2213 mpeg2_crystalhd_decoder_select="crystalhd"
2214 mpeg2_dxva2_hwaccel_deps="dxva2"
2215 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2216 mpeg2_vaapi_hwaccel_deps="vaapi"
2217 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2218 mpeg2_vdpau_hwaccel_deps="vdpau"
2219 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2220 mpeg2_xvmc_hwaccel_deps="xvmc"
2221 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2222 mpeg4_crystalhd_decoder_select="crystalhd"
2223 mpeg4_vaapi_hwaccel_deps="vaapi"
2224 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2225 mpeg4_vdpau_decoder_deps="vdpau"
2226 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2227 mpeg4_vdpau_hwaccel_deps="vdpau"
2228 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2229 msmpeg4_crystalhd_decoder_select="crystalhd"
2230 vc1_crystalhd_decoder_select="crystalhd"
2231 vc1_dxva2_hwaccel_deps="dxva2"
2232 vc1_dxva2_hwaccel_select="vc1_decoder"
2233 vc1_vaapi_hwaccel_deps="vaapi"
2234 vc1_vaapi_hwaccel_select="vc1_decoder"
2235 vc1_vdpau_decoder_deps="vdpau"
2236 vc1_vdpau_decoder_select="vc1_decoder"
2237 vc1_vdpau_hwaccel_deps="vdpau"
2238 vc1_vdpau_hwaccel_select="vc1_decoder"
2239 wmv3_crystalhd_decoder_select="crystalhd"
2240 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2241 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2242 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2243 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2244
2245 # parsers
2246 h264_parser_select="h264_decoder"
2247 hevc_parser_select="hevc_decoder"
2248 mpeg4video_parser_select="error_resilience h263dsp mpegvideo"
2249 mpegvideo_parser_select="error_resilience mpegvideo"
2250 vc1_parser_select="mpegvideo"
2251
2252 # external libraries
2253 libaacplus_encoder_deps="libaacplus"
2254 libcelt_decoder_deps="libcelt"
2255 libfaac_encoder_deps="libfaac"
2256 libfaac_encoder_select="audio_frame_queue"
2257 libfdk_aac_decoder_deps="libfdk_aac"
2258 libfdk_aac_encoder_deps="libfdk_aac"
2259 libfdk_aac_encoder_select="audio_frame_queue"
2260 libgme_demuxer_deps="libgme"
2261 libgsm_decoder_deps="libgsm"
2262 libgsm_encoder_deps="libgsm"
2263 libgsm_ms_decoder_deps="libgsm"
2264 libgsm_ms_encoder_deps="libgsm"
2265 libilbc_decoder_deps="libilbc"
2266 libilbc_encoder_deps="libilbc"
2267 libmodplug_demuxer_deps="libmodplug"
2268 libmp3lame_encoder_deps="libmp3lame"
2269 libmp3lame_encoder_select="audio_frame_queue"
2270 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2271 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2272 libopencore_amrnb_encoder_select="audio_frame_queue"
2273 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2274 libopenjpeg_decoder_deps="libopenjpeg"
2275 libopenjpeg_encoder_deps="libopenjpeg"
2276 libopus_decoder_deps="libopus"
2277 libopus_encoder_deps="libopus"
2278 libopus_encoder_select="audio_frame_queue"
2279 libquvi_demuxer_deps="libquvi"
2280 libschroedinger_decoder_deps="libschroedinger"
2281 libschroedinger_encoder_deps="libschroedinger"
2282 libshine_encoder_deps="libshine"
2283 libshine_encoder_select="audio_frame_queue"
2284 libspeex_decoder_deps="libspeex"
2285 libspeex_encoder_deps="libspeex"
2286 libspeex_encoder_select="audio_frame_queue"
2287 libstagefright_h264_decoder_deps="libstagefright_h264"
2288 libtheora_encoder_deps="libtheora"
2289 libtwolame_encoder_deps="libtwolame"
2290 libvo_aacenc_encoder_deps="libvo_aacenc"
2291 libvo_aacenc_encoder_select="audio_frame_queue"
2292 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2293 libvorbis_decoder_deps="libvorbis"
2294 libvorbis_encoder_deps="libvorbis"
2295 libvorbis_encoder_select="audio_frame_queue"
2296 libvpx_vp8_decoder_deps="libvpx"
2297 libvpx_vp8_encoder_deps="libvpx"
2298 libvpx_vp9_decoder_deps="libvpx"
2299 libvpx_vp9_encoder_deps="libvpx"
2300 libwavpack_encoder_deps="libwavpack"
2301 libwebp_encoder_deps="libwebp"
2302 libx264_encoder_deps="libx264"
2303 libx264rgb_encoder_deps="libx264"
2304 libx265_encoder_deps="libx265"
2305 libxavs_encoder_deps="libxavs"
2306 libxvid_encoder_deps="libxvid"
2307 libutvideo_decoder_deps="libutvideo"
2308 libutvideo_encoder_deps="libutvideo"
2309 libzvbi_teletext_decoder_deps="libzvbi"
2310
2311 # demuxers / muxers
2312 ac3_demuxer_select="ac3_parser"
2313 asf_demuxer_select="riffdec"
2314 asf_muxer_select="riffenc"
2315 asf_stream_muxer_select="asf_muxer"
2316 avi_demuxer_select="riffdec exif"
2317 avi_muxer_select="riffenc"
2318 avisynth_demuxer_deps="avisynth"
2319 avisynth_demuxer_select="riffdec"
2320 caf_demuxer_select="riffdec"
2321 dirac_demuxer_select="dirac_parser"
2322 dts_demuxer_select="dca_parser"
2323 dtshd_demuxer_select="dca_parser"
2324 dxa_demuxer_select="riffdec"
2325 eac3_demuxer_select="ac3_parser"
2326 f4v_muxer_select="mov_muxer"
2327 flac_demuxer_select="flac_parser"
2328 hds_muxer_select="flv_muxer"
2329 hls_muxer_select="mpegts_muxer"
2330 image2_alias_pix_demuxer_select="image2_demuxer"
2331 image2_brender_pix_demuxer_select="image2_demuxer"
2332 ipod_muxer_select="mov_muxer"
2333 ismv_muxer_select="mov_muxer"
2334 libnut_demuxer_deps="libnut"
2335 libnut_muxer_deps="libnut"
2336 matroska_audio_muxer_select="matroska_muxer"
2337 matroska_demuxer_select="riffdec"
2338 matroska_demuxer_suggest="bzlib lzo zlib"
2339 matroska_muxer_select="riffenc"
2340 mmf_muxer_select="riffenc"
2341 mov_demuxer_select="riffdec"
2342 mov_demuxer_suggest="zlib"
2343 mov_muxer_select="riffenc rtpenc_chain"
2344 mp3_demuxer_select="mpegaudio_parser"
2345 mp4_muxer_select="mov_muxer"
2346 mpegts_muxer_select="adts_muxer latm_muxer"
2347 mpegtsraw_demuxer_select="mpegts_demuxer"
2348 mxf_d10_muxer_select="mxf_muxer"
2349 nut_muxer_select="riffenc"
2350 nuv_demuxer_select="riffdec"
2351 ogg_demuxer_select="golomb"
2352 psp_muxer_select="mov_muxer"
2353 rtp_demuxer_select="sdp_demuxer"
2354 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2355 rtsp_demuxer_select="http_protocol rtpdec"
2356 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2357 sap_demuxer_select="sdp_demuxer"
2358 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2359 sdp_demuxer_select="rtpdec"
2360 smoothstreaming_muxer_select="ismv_muxer"
2361 spdif_muxer_select="aac_parser"
2362 tak_demuxer_select="tak_parser"
2363 tg2_muxer_select="mov_muxer"
2364 tgp_muxer_select="mov_muxer"
2365 vobsub_demuxer_select="mpegps_demuxer"
2366 w64_demuxer_select="wav_demuxer"
2367 w64_muxer_select="wav_muxer"
2368 wav_demuxer_select="riffdec"
2369 wav_muxer_select="riffenc"
2370 webm_muxer_select="riffenc"
2371 wtv_demuxer_select="riffdec"
2372 wtv_muxer_select="riffenc"
2373 xmv_demuxer_select="riffdec"
2374 xwma_demuxer_select="riffdec"
2375
2376 # indevs / outdevs
2377 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2378 alsa_outdev_deps="alsa_asoundlib_h"
2379 avfoundation_indev_extralibs="-framework CoreVideo -framework Foundation -framework AVFoundation -framework CoreMedia"
2380 avfoundation_indev_select="avfoundation"
2381 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2382 caca_outdev_deps="libcaca"
2383 decklink_outdev_deps="decklink pthreads"
2384 decklink_outdev_extralibs="-lstdc++"
2385 dshow_indev_deps="IBaseFilter"
2386 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
2387 dv1394_indev_deps="dv1394"
2388 dv1394_indev_select="dv_demuxer"
2389 fbdev_indev_deps="linux_fb_h"
2390 fbdev_outdev_deps="linux_fb_h"
2391 gdigrab_indev_deps="CreateDIBSection"
2392 gdigrab_indev_extralibs="-lgdi32"
2393 gdigrab_indev_select="bmp_decoder"
2394 iec61883_indev_deps="libiec61883"
2395 jack_indev_deps="jack_jack_h sem_timedwait"
2396 lavfi_indev_deps="avfilter"
2397 libcdio_indev_deps="libcdio"
2398 libdc1394_indev_deps="libdc1394"
2399 libv4l2_indev_deps="libv4l2"
2400 openal_indev_deps="openal"
2401 opengl_outdev_deps="opengl"
2402 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2403 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2404 pulse_indev_deps="libpulse"
2405 pulse_outdev_deps="libpulse"
2406 qtkit_indev_extralibs="-framework QTKit -framework Foundation -framework QuartzCore"
2407 qtkit_indev_select="qtkit"
2408 sdl_outdev_deps="sdl"
2409 sndio_indev_deps="sndio_h"
2410 sndio_outdev_deps="sndio_h"
2411 v4l_indev_deps="linux_videodev_h"
2412 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2413 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2414 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2415 vfwcap_indev_extralibs="-lavicap32"
2416 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2417 xv_outdev_extralibs="-lXv -lX11 -lXext"
2418 x11grab_indev_deps="x11grab"
2419
2420 # protocols
2421 bluray_protocol_deps="libbluray"
2422 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2423 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2424 ffrtmpcrypt_protocol_select="tcp_protocol"
2425 ffrtmphttp_protocol_deps="!librtmp_protocol"
2426 ffrtmphttp_protocol_select="http_protocol"
2427 ftp_protocol_select="tcp_protocol"
2428 gopher_protocol_select="network"
2429 http_protocol_select="tcp_protocol"
2430 httpproxy_protocol_select="tcp_protocol"
2431 https_protocol_select="tls_protocol"
2432 librtmp_protocol_deps="librtmp"
2433 librtmpe_protocol_deps="librtmp"
2434 librtmps_protocol_deps="librtmp"
2435 librtmpt_protocol_deps="librtmp"
2436 librtmpte_protocol_deps="librtmp"
2437 libssh_protocol_deps="libssh"
2438 mmsh_protocol_select="http_protocol"
2439 mmst_protocol_select="network"
2440 rtmp_protocol_deps="!librtmp_protocol"
2441 rtmp_protocol_select="tcp_protocol"
2442 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2443 rtmps_protocol_deps="!librtmp_protocol"
2444 rtmps_protocol_select="tls_protocol"
2445 rtmpt_protocol_select="ffrtmphttp_protocol"
2446 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2447 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2448 rtp_protocol_select="udp_protocol"
2449 sctp_protocol_deps="struct_sctp_event_subscribe"
2450 sctp_protocol_select="network"
2451 srtp_protocol_select="rtp_protocol"
2452 tcp_protocol_select="network"
2453 tls_protocol_deps_any="openssl gnutls"
2454 tls_protocol_select="tcp_protocol"
2455 udp_protocol_select="network"
2456 unix_protocol_deps="sys_un_h"
2457 unix_protocol_select="network"
2458
2459 # filters
2460 aconvert_filter_deps="swresample"
2461 amovie_filter_deps="avcodec avformat"
2462 aresample_filter_deps="swresample"
2463 ass_filter_deps="libass"
2464 asyncts_filter_deps="avresample"
2465 atempo_filter_deps="avcodec"
2466 atempo_filter_select="rdft"
2467 azmq_filter_deps="libzmq"
2468 blackframe_filter_deps="gpl"
2469 boxblur_filter_deps="gpl"
2470 bs2b_filter_deps="libbs2b"
2471 colormatrix_filter_deps="gpl"
2472 cropdetect_filter_deps="gpl"
2473 dctdnoiz_filter_deps="avcodec"
2474 dctdnoiz_filter_select="dct"
2475 delogo_filter_deps="gpl"
2476 deshake_filter_deps="avcodec"
2477 deshake_filter_select="dsputil"
2478 drawtext_filter_deps="libfreetype"
2479 ebur128_filter_deps="gpl"
2480 flite_filter_deps="libflite"
2481 frei0r_filter_deps="frei0r dlopen"
2482 frei0r_filter_extralibs='$ldl'
2483 frei0r_src_filter_deps="frei0r dlopen"
2484 frei0r_src_filter_extralibs='$ldl'
2485 geq_filter_deps="gpl"
2486 histeq_filter_deps="gpl"
2487 hqdn3d_filter_deps="gpl"
2488 interlace_filter_deps="gpl"
2489 kerndeint_filter_deps="gpl"
2490 ladspa_filter_deps="ladspa dlopen"
2491 mcdeint_filter_deps="avcodec gpl"
2492 movie_filter_deps="avcodec avformat"
2493 mp_filter_deps="gpl avcodec swscale inline_asm"
2494 mpdecimate_filter_deps="gpl avcodec"
2495 mptestsrc_filter_deps="gpl"
2496 negate_filter_deps="lut_filter"
2497 perspective_filter_deps="gpl"
2498 ocv_filter_deps="libopencv"
2499 owdenoise_filter_deps="gpl"
2500 pan_filter_deps="swresample"
2501 phase_filter_deps="gpl"
2502 pp_filter_deps="gpl postproc"
2503 pullup_filter_deps="gpl"
2504 removelogo_filter_deps="avcodec avformat swscale"
2505 resample_filter_deps="avresample"
2506 sab_filter_deps="gpl swscale"
2507 scale_filter_deps="swscale"
2508 smartblur_filter_deps="gpl swscale"
2509 showspectrum_filter_deps="avcodec"
2510 showspectrum_filter_select="rdft"
2511 spp_filter_deps="gpl avcodec"
2512 spp_filter_select="fft"
2513 stereo3d_filter_deps="gpl"
2514 subtitles_filter_deps="avformat avcodec libass"
2515 super2xsai_filter_deps="gpl"
2516 tinterlace_filter_deps="gpl"
2517 vidstabdetect_filter_deps="libvidstab"
2518 vidstabtransform_filter_deps="libvidstab"
2519 pixfmts_super2xsai_test_deps="super2xsai_filter"
2520 tinterlace_merge_test_deps="tinterlace_filter"
2521 tinterlace_pad_test_deps="tinterlace_filter"
2522 zmq_filter_deps="libzmq"
2523
2524 # examples
2525 avio_reading="avformat avcodec avutil"
2526 avcodec_example_deps="avcodec avutil"
2527 demuxing_decoding_example_deps="avcodec avformat avutil"
2528 filter_audio_example_deps="avfilter avutil"
2529 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2530 filtering_video_example_deps="avfilter avcodec avformat avutil"
2531 metadata_example_deps="avformat avutil"
2532 muxing_example_deps="avcodec avformat avutil swscale"
2533 remuxing_example_deps="avcodec avformat avutil"
2534 resampling_audio_example_deps="avutil swresample"
2535 scaling_video_example_deps="avutil swscale"
2536 transcode_aac_example_deps="avcodec avformat swresample"
2537 transcoding_example_deps="avfilter avcodec avformat avutil"
2538
2539 # libraries
2540 avcodec_deps="avutil"
2541 avdevice_deps="avutil avcodec avformat"
2542 avfilter_deps="avutil"
2543 avformat_deps="avutil avcodec"
2544 avresample_deps="avutil"
2545 postproc_deps="avutil gpl"
2546 swscale_deps="avutil"
2547
2548 # programs
2549 ffmpeg_deps="avcodec avfilter avformat swresample"
2550 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2551                null_filter
2552                setpts_filter trim_filter"
2553 ffplay_deps="avcodec avformat swscale swresample sdl"
2554 ffplay_libs='$sdl_libs'
2555 ffplay_select="rdft crop_filter"
2556 ffprobe_deps="avcodec avformat"
2557 ffserver_deps="avformat fork sarestart"
2558 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2559
2560 # documentation
2561 podpages_deps="perl"
2562 manpages_deps="perl pod2man"
2563 htmlpages_deps="perl texi2html"
2564 txtpages_deps="perl makeinfo"
2565 doc_deps_any="manpages htmlpages podpages txtpages"
2566
2567 # default parameters
2568
2569 logfile="config.log"
2570
2571 # installation paths
2572 prefix_default="/usr/local"
2573 bindir_default='${prefix}/bin'
2574 datadir_default='${prefix}/share/ffmpeg'
2575 docdir_default='${prefix}/share/doc/ffmpeg'
2576 incdir_default='${prefix}/include'
2577 libdir_default='${prefix}/lib'
2578 mandir_default='${prefix}/share/man'
2579 shlibdir_default="$libdir_default"
2580
2581 # toolchain
2582 ar_default="ar"
2583 cc_default="gcc"
2584 cxx_default="g++"
2585 host_cc_default="gcc"
2586 cp_f="cp -f"
2587 install="install"
2588 ln_s="ln -s -f"
2589 nm_default="nm -g"
2590 objformat="elf"
2591 pkg_config_default=pkg-config
2592 ranlib_default="ranlib"
2593 strip_default="strip"
2594 yasmexe_default="yasm"
2595 windres_default="windres"
2596
2597 nogas=":"
2598
2599 # OS
2600 target_os_default=$(tolower $(uname -s))
2601 host_os=$target_os_default
2602
2603 # machine
2604 if test "$target_os_default" = aix; then
2605     arch_default=$(uname -p)
2606 else
2607     arch_default=$(uname -m)
2608 fi
2609 cpu="generic"
2610
2611 # configurable options
2612 enable $PROGRAM_LIST
2613 enable $DOCUMENT_LIST
2614 enable $EXAMPLE_LIST
2615 enable $(filter_out avresample $LIBRARY_LIST)
2616 enable stripping
2617
2618 enable asm
2619 enable debug
2620 enable doc
2621 enable optimizations
2622 enable runtime_cpudetect
2623 enable safe_bitstream_reader
2624 enable static
2625 enable swscale_alpha
2626
2627 # Enable hwaccels by default.
2628 enable dxva2 vaapi vda vdpau xvmc
2629 enable xlib
2630
2631 # build settings
2632 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2633 LIBPREF="lib"
2634 LIBSUF=".a"
2635 FULLNAME='$(NAME)$(BUILDSUF)'
2636 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2637 SLIBPREF="lib"
2638 SLIBSUF=".so"
2639 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2640 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2641 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2642 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2643 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2644 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2645
2646 asflags_filter=echo
2647 cflags_filter=echo
2648 ldflags_filter=echo
2649
2650 AS_C='-c'
2651 AS_O='-o $@'
2652 CC_C='-c'
2653 CC_E='-E -o $@'
2654 CC_O='-o $@'
2655 CXX_C='-c'
2656 CXX_O='-o $@'
2657 LD_O='-o $@'
2658 LD_LIB='-l%'
2659 LD_PATH='-L'
2660 HOSTCC_C='-c'
2661 HOSTCC_E='-E -o $@'
2662 HOSTCC_O='-o $@'
2663 HOSTLD_O='-o $@'
2664
2665 host_libs='-lm'
2666 host_cflags_filter=echo
2667 host_ldflags_filter=echo
2668
2669 target_path='$(CURDIR)'
2670
2671 # since the object filename is not given with the -MM flag, the compiler
2672 # is only able to print the basename, and we must add the path ourselves
2673 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2674 DEPFLAGS='-MM'
2675
2676 # find source path
2677 if test -f configure; then
2678     source_path=.
2679 else
2680     source_path=$(cd $(dirname "$0"); pwd)
2681     echo "$source_path" | grep -q '[[:blank:]]' &&
2682         die "Out of tree builds are impossible with whitespace in source path."
2683     test -e "$source_path/config.h" &&
2684         die "Out of tree builds are impossible with config.h in source dir."
2685 fi
2686
2687 for v in "$@"; do
2688     r=${v#*=}
2689     l=${v%"$r"}
2690     r=$(sh_quote "$r")
2691     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2692 done
2693
2694 find_things(){
2695     thing=$1
2696     pattern=$2
2697     file=$source_path/$3
2698     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2699 }
2700
2701 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2702 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2703 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2704 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2705 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2706 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2707 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2708 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2709 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2710 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2711 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2712
2713 ALL_COMPONENTS="
2714     $BSF_LIST
2715     $DECODER_LIST
2716     $DEMUXER_LIST
2717     $ENCODER_LIST
2718     $FILTER_LIST
2719     $HWACCEL_LIST
2720     $INDEV_LIST
2721     $MUXER_LIST
2722     $OUTDEV_LIST
2723     $PARSER_LIST
2724     $PROTOCOL_LIST
2725 "
2726
2727 for n in $COMPONENT_LIST; do
2728     v=$(toupper ${n%s})_LIST
2729     eval enable \$$v
2730     eval ${n}_if_any="\$$v"
2731 done
2732
2733 enable $ARCH_EXT_LIST
2734
2735 die_unknown(){
2736     echo "Unknown option \"$1\"."
2737     echo "See $0 --help for available options."
2738     exit 1
2739 }
2740
2741 print_3_columns() {
2742     cat | tr ' ' '\n' | sort | pr -r -3 -t
2743 }
2744
2745 show_list() {
2746     suffix=_$1
2747     shift
2748     echo $* | sed s/$suffix//g | print_3_columns
2749     exit 0
2750 }
2751
2752 rand_list(){
2753     IFS=', '
2754     set -- $*
2755     unset IFS
2756     for thing; do
2757         comp=${thing%:*}
2758         prob=${thing#$comp}
2759         prob=${prob#:}
2760         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2761         echo "prob ${prob:-0.5}"
2762         printf '%s\n' $comp
2763     done
2764 }
2765
2766 do_random(){
2767     action=$1
2768     shift
2769     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2770     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2771 }
2772
2773 for opt do
2774     optval="${opt#*=}"
2775     case "$opt" in
2776         --extra-ldflags=*)
2777             add_ldflags $optval
2778         ;;
2779         --extra-libs=*)
2780             add_extralibs $optval
2781         ;;
2782         --disable-devices)
2783             disable $INDEV_LIST $OUTDEV_LIST
2784         ;;
2785         --enable-debug=*)
2786             debuglevel="$optval"
2787         ;;
2788         --disable-programs)
2789             disable $PROGRAM_LIST
2790         ;;
2791         --disable-everything)
2792             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2793         ;;
2794         --disable-all)
2795             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2796             disable $LIBRARY_LIST $PROGRAM_LIST doc
2797         ;;
2798         --enable-random|--disable-random)
2799             action=${opt%%-random}
2800             do_random ${action#--} $COMPONENT_LIST
2801         ;;
2802         --enable-random=*|--disable-random=*)
2803             action=${opt%%-random=*}
2804             do_random ${action#--} $optval
2805         ;;
2806         --enable-*=*|--disable-*=*)
2807             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2808             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2809             eval list=\$$(toupper $thing)_LIST
2810             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2811             list=$(filter "$name" $list)
2812             [ "$list" = "" ] && warn "Option $opt did not match anything"
2813             $action $list
2814         ;;
2815         --enable-?*|--disable-?*)
2816             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2817             if is_in $option $COMPONENT_LIST; then
2818                 test $action = disable && action=unset
2819                 eval $action \$$(toupper ${option%s})_LIST
2820             elif is_in $option $CMDLINE_SELECT; then
2821                 $action $option
2822             else
2823                 die_unknown $opt
2824             fi
2825         ;;
2826         --list-*)
2827             NAME="${opt#--list-}"
2828             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2829             NAME=${NAME%s}
2830             eval show_list $NAME \$$(toupper $NAME)_LIST
2831         ;;
2832         --help|-h) show_help
2833         ;;
2834         --fatal-warnings) enable fatal_warnings
2835         ;;
2836         *)
2837             optname="${opt%%=*}"
2838             optname="${optname#--}"
2839             optname=$(echo "$optname" | sed 's/-/_/g')
2840             if is_in $optname $CMDLINE_SET; then
2841                 eval $optname='$optval'
2842             elif is_in $optname $CMDLINE_APPEND; then
2843                 append $optname "$optval"
2844             else
2845                 die_unknown $opt
2846             fi
2847         ;;
2848     esac
2849 done
2850
2851 disabled logging && logfile=/dev/null
2852
2853 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2854 set >> $logfile
2855
2856 test -n "$cross_prefix" && enable cross_compile
2857
2858 if enabled cross_compile; then
2859     test -n "$arch" && test -n "$target_os" ||
2860         die "Must specify target arch and OS when cross-compiling"
2861 fi
2862
2863 ar_default="${cross_prefix}${ar_default}"
2864 cc_default="${cross_prefix}${cc_default}"
2865 cxx_default="${cross_prefix}${cxx_default}"
2866 nm_default="${cross_prefix}${nm_default}"
2867 pkg_config_default="${cross_prefix}${pkg_config_default}"
2868 ranlib_default="${cross_prefix}${ranlib_default}"
2869 strip_default="${cross_prefix}${strip_default}"
2870 windres_default="${cross_prefix}${windres_default}"
2871
2872 sysinclude_default="${sysroot}/usr/include"
2873
2874 test -n "$valgrind" && toolchain="valgrind-memcheck"
2875
2876 case "$toolchain" in
2877     clang-asan)
2878         cc_default="clang"
2879         add_cflags  -fsanitize=address
2880         add_ldflags -fsanitize=address
2881     ;;
2882     clang-tsan)
2883         cc_default="clang"
2884         add_cflags  -fsanitize=thread -pie
2885         add_ldflags -fsanitize=thread -pie
2886     ;;
2887     clang-usan)
2888         cc_default="clang"
2889         add_cflags  -fsanitize=undefined
2890         add_ldflags -fsanitize=undefined
2891     ;;
2892     gcc-asan)
2893         cc_default="gcc"
2894         add_cflags  -fsanitize=address
2895         add_ldflags -fsanitize=address
2896     ;;
2897     gcc-tsan)
2898         cc_default="gcc"
2899         add_cflags  -fsanitize=thread -pie -fPIC
2900         add_ldflags -fsanitize=thread -pie -fPIC
2901     ;;
2902     gcc-usan)
2903         cc_default="gcc"
2904         add_cflags  -fsanitize=undefined
2905         add_ldflags -fsanitize=undefined
2906     ;;
2907     valgrind-massif)
2908         target_exec_default=${valgrind:-"valgrind"}
2909         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"
2910     ;;
2911     valgrind-memcheck)
2912         target_exec_default=${valgrind:-"valgrind"}
2913         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
2914     ;;
2915     msvc)
2916         # Check whether the current MSVC version needs the C99 converter.
2917         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2918         # support enough of C99 to build ffmpeg. Default to the new
2919         # behaviour if the regexp was unable to match anything, since this
2920         # successfully parses the version number of existing supported
2921         # versions that require the converter (MSVC 2010 and 2012).
2922         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2923         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2924             cc_default="cl"
2925         else
2926             cc_default="c99wrap cl"
2927         fi
2928         ld_default="link"
2929         nm_default="dumpbin -symbols"
2930         ar_default="lib"
2931         target_os_default="win32"
2932         # Use a relative path for TMPDIR. This makes sure all the
2933         # ffconf temp files are written with a relative path, avoiding
2934         # issues with msys/win32 path conversion for MSVC parameters
2935         # such as -Fo<file> or -out:<file>.
2936         TMPDIR=.
2937     ;;
2938     icl)
2939         cc_default="icl"
2940         ld_default="xilink"
2941         nm_default="dumpbin -symbols"
2942         ar_default="xilib"
2943         target_os_default="win32"
2944         TMPDIR=.
2945     ;;
2946     gcov)
2947         add_cflags  -fprofile-arcs -ftest-coverage
2948         add_ldflags -fprofile-arcs -ftest-coverage
2949     ;;
2950     hardened)
2951         add_cflags  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2952         add_ldflags -Wl,-z,relro -Wl,-z,now
2953     ;;
2954     ?*)
2955         die "Unknown toolchain $toolchain"
2956     ;;
2957 esac
2958
2959 set_default arch cc cxx pkg_config ranlib strip sysinclude target_exec target_os yasmexe
2960 enabled cross_compile || host_cc_default=$cc
2961 set_default host_cc
2962
2963 if ! $pkg_config --version >/dev/null 2>&1; then
2964     warn "$pkg_config not found, library detection may fail."
2965     pkg_config=false
2966 fi
2967
2968 exesuf() {
2969     case $1 in
2970         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2971     esac
2972 }
2973
2974 EXESUF=$(exesuf $target_os)
2975 HOSTEXESUF=$(exesuf $host_os)
2976
2977 # set temporary file name
2978 : ${TMPDIR:=$TEMPDIR}
2979 : ${TMPDIR:=$TMP}
2980 : ${TMPDIR:=/tmp}
2981
2982 if [ -n "$tempprefix" ] ; then
2983     mktemp(){
2984         echo $tempprefix.${HOSTNAME}.${UID}
2985     }
2986 elif ! check_cmd mktemp -u XXXXXX; then
2987     # simple replacement for missing mktemp
2988     # NOT SAFE FOR GENERAL USE
2989     mktemp(){
2990         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2991     }
2992 fi
2993
2994 tmpfile(){
2995     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2996         (set -C; exec > $tmp) 2>/dev/null ||
2997         die "Unable to create temporary file in $TMPDIR."
2998     append TMPFILES $tmp
2999     eval $1=$tmp
3000 }
3001
3002 trap 'rm -f -- $TMPFILES' EXIT
3003
3004 tmpfile TMPASM .asm
3005 tmpfile TMPC   .c
3006 tmpfile TMPCPP .cpp
3007 tmpfile TMPE   $EXESUF
3008 tmpfile TMPH   .h
3009 tmpfile TMPM   .m
3010 tmpfile TMPO   .o
3011 tmpfile TMPS   .S
3012 tmpfile TMPSH  .sh
3013 tmpfile TMPV   .ver
3014
3015 unset -f mktemp
3016
3017 chmod +x $TMPE
3018
3019 # make sure we can execute files in $TMPDIR
3020 cat > $TMPSH 2>> $logfile <<EOF
3021 #! /bin/sh
3022 EOF
3023 chmod +x $TMPSH >> $logfile 2>&1
3024 if ! $TMPSH >> $logfile 2>&1; then
3025     cat <<EOF
3026 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3027 variable to another directory and make sure that it is not mounted noexec.
3028 EOF
3029     die "Sanity test failed."
3030 fi
3031
3032 ccc_flags(){
3033     for flag; do
3034         case $flag in
3035             -std=c99)           echo -c99                       ;;
3036             -mcpu=*)            echo -arch ${flag#*=}           ;;
3037             -mieee)             echo -ieee                      ;;
3038             -O*|-fast)          echo $flag                      ;;
3039             -fno-math-errno)    echo -assume nomath_errno       ;;
3040             -g)                 echo -g3                        ;;
3041             -Wall)              echo -msg_enable level2         ;;
3042             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3043             -Wl,*)              echo $flag                      ;;
3044             -f*|-W*)                                            ;;
3045             *)                  echo $flag                      ;;
3046         esac
3047    done
3048 }
3049
3050 cparser_flags(){
3051     for flag; do
3052         case $flag in
3053             -Wno-switch)             echo -Wno-switch-enum ;;
3054             -Wno-format-zero-length) ;;
3055             -Wdisabled-optimization) ;;
3056             -Wno-pointer-sign)       echo -Wno-other ;;
3057             *)                       echo $flag ;;
3058         esac
3059     done
3060 }
3061
3062 msvc_common_flags(){
3063     for flag; do
3064         case $flag in
3065             # In addition to specifying certain flags under the compiler
3066             # specific filters, they must be specified here as well or else the
3067             # generic catch all at the bottom will print the original flag.
3068             -Wall)                ;;
3069             -std=c99)             ;;
3070             # Common flags
3071             -fomit-frame-pointer) ;;
3072             -g)                   echo -Z7 ;;
3073             -fno-math-errno)      ;;
3074             -fno-common)          ;;
3075             -fno-signed-zeros)    ;;
3076             -fPIC)                ;;
3077             -mthumb)              ;;
3078             -march=*)             ;;
3079             -lz)                  echo zlib.lib ;;
3080             -lavifil32)           echo vfw32.lib ;;
3081             -lavicap32)           echo vfw32.lib user32.lib ;;
3082             -l*)                  echo ${flag#-l}.lib ;;
3083             *)                    echo $flag ;;
3084         esac
3085     done
3086 }
3087
3088 msvc_flags(){
3089     msvc_common_flags "$@"
3090     for flag; do
3091         case $flag in
3092             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3093                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3094                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3095                                        -wd4554 \
3096                                        -wd4273 ;;
3097         esac
3098     done
3099 }
3100
3101 icl_flags(){
3102     msvc_common_flags "$@"
3103     for flag; do
3104         case $flag in
3105             # Despite what Intel's documentation says -Wall, which is supported
3106             # on Windows, does enable remarks so disable them here.
3107             -Wall)                echo $flag -Qdiag-disable:remark ;;
3108             -std=c99)             echo -Qstd=c99 ;;
3109         esac
3110     done
3111 }
3112
3113 icc_flags(){
3114     for flag; do
3115         case $flag in
3116             -flto)                echo -ipo ;;
3117             *)                    echo $flag ;;
3118         esac
3119     done
3120 }
3121
3122 pgi_flags(){
3123     for flag; do
3124         case $flag in
3125             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3126             -fomit-frame-pointer) echo -Mnoframe ;;
3127             -g)                   echo -gopt ;;
3128             *)                    echo $flag ;;
3129         esac
3130     done
3131 }
3132
3133 suncc_flags(){
3134     for flag; do
3135         case $flag in
3136             -march=*|-mcpu=*)
3137                 case "${flag#*=}" in
3138                     native)                   echo -xtarget=native       ;;
3139                     v9|niagara)               echo -xarch=sparc          ;;
3140                     ultrasparc)               echo -xarch=sparcvis       ;;
3141                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3142                     i586|pentium)             echo -xchip=pentium        ;;
3143                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3144                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3145                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3146                     pentium4*)          echo -xtarget=pentium4           ;;
3147                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3148                     *-sse3)             echo -xarch=sse3                 ;;
3149                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3150                     bonnell)                   echo -xarch=ssse3         ;;
3151                     corei7|nehalem)            echo -xtarget=nehalem     ;;
3152                     westmere)                  echo -xtarget=westmere    ;;
3153                     silvermont)                echo -xarch=sse4_2        ;;
3154                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
3155                     core-avx*|ivybridge|haswell|broadwell)
3156                                                echo -xarch=avx           ;;
3157                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
3158                     btver1)                    echo -xarch=amdsse4a      ;;
3159                     btver2|bdver*)             echo -xarch=avx           ;;
3160                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3161                     k8|opteron|athlon64|athlon-fx)
3162                                                echo -xarch=sse2a         ;;
3163                     athlon*)                   echo -xarch=pentium_proa  ;;
3164                 esac
3165                 ;;
3166             -std=c99)             echo -xc99              ;;
3167             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3168             -fPIC)                echo -KPIC -xcode=pic32 ;;
3169             -W*,*)                echo $flag              ;;
3170             -f*-*|-W*|-mimpure-text)                      ;;
3171             -shared)              echo -G                 ;;
3172             *)                    echo $flag              ;;
3173         esac
3174     done
3175 }
3176
3177 tms470_flags(){
3178     for flag; do
3179         case $flag in
3180             -march=*|-mcpu=*)
3181                 case "${flag#*=}" in
3182                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3183                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3184                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3185                     armv6*|arm11*)          echo -mv=6   ;;
3186                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3187                                             echo -mv=5e  ;;
3188                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3189                 esac
3190                 ;;
3191             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3192             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3193             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3194             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3195             -msoft-float)   echo --float_support=vfplib       ;;
3196             -O[0-3]|-mf=*)  echo $flag                        ;;
3197             -g)             echo -g -mn                       ;;
3198             -pds=*)         echo $flag                        ;;
3199             -D*|-I*)        echo $flag                        ;;
3200             --gcc|--abi=*)  echo $flag                        ;;
3201             -me)            echo $flag                        ;;
3202         esac
3203     done
3204 }
3205
3206 probe_cc(){
3207     pfx=$1
3208     _cc=$2
3209
3210     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3211     unset _ld_o _ldflags _ld_lib _ld_path
3212     unset _depflags _DEPCMD _DEPFLAGS
3213     _flags_filter=echo
3214
3215     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3216         true # no-op to avoid reading stdin in following checks
3217     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3218         _type=llvm_gcc
3219         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
3220         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
3221         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3222         _cflags_speed='-O3'
3223         _cflags_size='-Os'
3224     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3225         _type=gcc
3226         gcc_version=$($_cc --version | head -n1)
3227         gcc_basever=$($_cc -dumpversion)
3228         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3229         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3230         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3231         if ! $_cc -dumpversion | grep -q '^2\.'; then
3232             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3233         fi
3234         _cflags_speed='-O3'
3235         _cflags_size='-Os'
3236     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3237         _type=icc
3238         _ident=$($_cc --version | head -n1)
3239         _depflags='-MMD'
3240         _cflags_speed='-O3'
3241         _cflags_size='-Os'
3242         _cflags_noopt='-O1'
3243         _flags_filter=icc_flags
3244     elif $_cc -v 2>&1 | grep -q xlc; then
3245         _type=xlc
3246         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3247         _cflags_speed='-O5'
3248         _cflags_size='-O5 -qcompact'
3249     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3250         _type=ccc
3251         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3252         _DEPFLAGS='-M'
3253         _cflags_speed='-fast'
3254         _cflags_size='-O1'
3255         _flags_filter=ccc_flags
3256     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3257         test -d "$sysroot" || die "No valid sysroot specified."
3258         _type=armcc
3259         _ident=$($_cc --vsn | head -n1 | sed 's/.*: //')
3260         armcc_conf="$PWD/armcc.conf"
3261         $_cc --arm_linux_configure                 \
3262              --arm_linux_config_file="$armcc_conf" \
3263              --configure_sysroot="$sysroot"        \
3264              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3265              die "Error creating armcc configuration file."
3266         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3267         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3268         as_default="${cross_prefix}gcc"
3269         _depflags='-MMD'
3270         _cflags_speed='-O3'
3271         _cflags_size='-Os'
3272     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3273         _type=tms470
3274         _ident=$($_cc -version | head -n1 | tr -s ' ')
3275         _flags='--gcc --abi=eabi -me'
3276         _cc_e='-ppl -fe=$@'
3277         _cc_o='-fe=$@'
3278         _depflags='-ppa -ppd=$(@:.o=.d)'
3279         _cflags_speed='-O3 -mf=5'
3280         _cflags_size='-O3 -mf=2'
3281         _flags_filter=tms470_flags
3282     elif $_cc -v 2>&1 | grep -q clang; then
3283         _type=clang
3284         _ident=$($_cc --version | head -n1)
3285         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3286         _cflags_speed='-O3'
3287         _cflags_size='-Os'
3288     elif $_cc -V 2>&1 | grep -q Sun; then
3289         _type=suncc
3290         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3291         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3292         _DEPFLAGS='-xM1 -xc99'
3293         _ldflags='-std=c99'
3294         _cflags_speed='-O5'
3295         _cflags_size='-O5 -xspace'
3296         _flags_filter=suncc_flags
3297     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3298         _type=pathscale
3299         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3300         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3301         _cflags_speed='-O2'
3302         _cflags_size='-Os'
3303         _flags_filter='filter_out -Wdisabled-optimization'
3304     elif $_cc -v 2>&1 | grep -q Open64; then
3305         _type=open64
3306         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3307         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3308         _cflags_speed='-O2'
3309         _cflags_size='-Os'
3310         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3311     elif $_cc -V 2>&1 | grep -q Portland; then
3312         _type=pgi
3313         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3314         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3315         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3316         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3317         _cflags_noopt="-O"
3318         _flags_filter=pgi_flags
3319     elif $_cc 2>&1 | grep -q Microsoft; then
3320         _type=msvc
3321         _ident=$($cc 2>&1 | head -n1)
3322         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3323         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3324         _cflags_speed="-O2"
3325         _cflags_size="-O1"
3326         if $_cc 2>&1 | grep -q Linker; then
3327             _ld_o='-out:$@'
3328         else
3329             _ld_o='-Fe$@'
3330         fi
3331         _cc_o='-Fo$@'
3332         _cc_e='-P -Fi$@'
3333         _flags_filter=msvc_flags
3334         _ld_lib='lib%.a'
3335         _ld_path='-libpath:'
3336         _flags='-nologo'
3337         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3338         if [ $pfx = hostcc ]; then
3339             append _cflags -Dsnprintf=_snprintf
3340         fi
3341         disable stripping
3342     elif $_cc 2>&1 | grep -q Intel; then
3343         _type=icl
3344         _ident=$($cc 2>&1 | head -n1)
3345         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3346         # Not only is O3 broken on 13.x+ but it is slower on all previous
3347         # versions (tested) as well.
3348         _cflags_speed="-O2"
3349         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3350         if $_cc 2>&1 | grep -q Linker; then
3351             _ld_o='-out:$@'
3352         else
3353             _ld_o='-Fe$@'
3354         fi
3355         _cc_o='-Fo$@'
3356         _cc_e='-P'
3357         _flags_filter=icl_flags
3358         _ld_lib='lib%.a'
3359         _ld_path='-libpath:'
3360         # -Qdiag-error to make icl error when seeing certain unknown arguments
3361         _flags='-nologo -Qdiag-error:4044,10157'
3362         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3363         # with MSVC which enables it by default.
3364         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
3365         if [ $pfx = hostcc ]; then
3366             append _cflags -Dsnprintf=_snprintf
3367         fi
3368     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3369         _type=cparser
3370         _ident=$($_cc --version | head -n1)
3371         _depflags='-MMD'
3372         _cflags_speed='-O4'
3373         _cflags_size='-O2'
3374         _flags_filter=cparser_flags
3375     fi
3376
3377     eval ${pfx}_type=\$_type
3378     eval ${pfx}_ident=\$_ident
3379 }
3380
3381 set_ccvars(){
3382     eval ${1}_C=\${_cc_c-\${${1}_C}}
3383     eval ${1}_E=\${_cc_e-\${${1}_E}}
3384     eval ${1}_O=\${_cc_o-\${${1}_O}}
3385
3386     if [ -n "$_depflags" ]; then
3387         eval ${1}_DEPFLAGS=\$_depflags
3388     else
3389         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3390         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3391         eval DEP${1}FLAGS=\$_flags
3392     fi
3393 }
3394
3395 probe_cc cc "$cc"
3396 cflags_filter=$_flags_filter
3397 cflags_speed=$_cflags_speed
3398 cflags_size=$_cflags_size
3399 cflags_noopt=$_cflags_noopt
3400 add_cflags $_flags $_cflags
3401 cc_ldflags=$_ldflags
3402 set_ccvars CC
3403
3404 probe_cc hostcc "$host_cc"
3405 host_cflags_filter=$_flags_filter
3406 add_host_cflags  $_flags $_cflags
3407 set_ccvars HOSTCC
3408
3409 test -n "$cc_type" && enable $cc_type ||
3410     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3411
3412 : ${as_default:=$cc}
3413 : ${dep_cc_default:=$cc}
3414 : ${ld_default:=$cc}
3415 : ${host_ld_default:=$host_cc}
3416 set_default ar as dep_cc ld host_ld windres
3417
3418 probe_cc as "$as"
3419 asflags_filter=$_flags_filter
3420 add_asflags $_flags $_cflags
3421 set_ccvars AS
3422
3423 probe_cc ld "$ld"
3424 ldflags_filter=$_flags_filter
3425 add_ldflags $_flags $_ldflags
3426 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3427 LD_O=${_ld_o-$LD_O}
3428 LD_LIB=${_ld_lib-$LD_LIB}
3429 LD_PATH=${_ld_path-$LD_PATH}
3430
3431 probe_cc hostld "$host_ld"
3432 host_ldflags_filter=$_flags_filter
3433 add_host_ldflags $_flags $_ldflags
3434 HOSTLD_O=${_ld_o-$HOSTLD_O}
3435
3436 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3437     probe_cc depcc "$dep_cc"
3438     CCDEP=${_DEPCMD:-$DEPCMD}
3439     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3440     DEPCCFLAGS=$_flags
3441 fi
3442
3443 if $ar 2>&1 | grep -q Microsoft; then
3444     arflags="-nologo"
3445     ar_o='-out:$@'
3446 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3447     arflags="rq"
3448     ar_o='$@'
3449 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3450     arflags='-Xany -r -c'
3451     ar_o='$@'
3452 else
3453     arflags="rc"
3454     ar_o='$@'
3455 fi
3456
3457 add_cflags $extra_cflags
3458 add_cxxflags $extra_cxxflags
3459 add_asflags $extra_cflags
3460
3461 if test -n "$sysroot"; then
3462     case "$cc_type" in
3463         gcc|llvm_gcc|clang)
3464             add_cppflags --sysroot="$sysroot"
3465             add_ldflags --sysroot="$sysroot"
3466 # On Darwin --sysroot may be ignored, -isysroot always affects headers and linking
3467             add_cppflags -isysroot "$sysroot"
3468             add_ldflags -isysroot "$sysroot"
3469         ;;
3470         tms470)
3471             add_cppflags -I"$sysinclude"
3472             add_ldflags  --sysroot="$sysroot"
3473         ;;
3474     esac
3475 fi
3476
3477 if test "$cpu" = host; then
3478     enabled cross_compile &&
3479         die "--cpu=host makes no sense when cross-compiling."
3480
3481     case "$cc_type" in
3482         gcc|llvm_gcc)
3483             check_native(){
3484                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3485                 sed -n "/cc1.*$1=/{
3486                             s/.*$1=\\([^ ]*\\).*/\\1/
3487                             p
3488                             q
3489                         }" $TMPE
3490             }
3491             cpu=$(check_native -march || check_native -mcpu)
3492         ;;
3493     esac
3494
3495     test "${cpu:-host}" = host &&
3496         die "--cpu=host not supported with compiler $cc"
3497 fi
3498
3499 # Deal with common $arch aliases
3500 case "$arch" in
3501     aarch64|arm64)
3502         arch="aarch64"
3503     ;;
3504     arm*|iPad*|iPhone*)
3505         arch="arm"
3506     ;;
3507     mips*|IP*)
3508         arch="mips"
3509     ;;
3510     parisc*|hppa*)
3511         arch="parisc"
3512     ;;
3513     "Power Macintosh"|ppc*|powerpc*)
3514         arch="ppc"
3515     ;;
3516     s390|s390x)
3517         arch="s390"
3518     ;;
3519     sh4|sh)
3520         arch="sh4"
3521     ;;
3522     sun4u|sparc*)
3523         arch="sparc"
3524     ;;
3525     tilegx|tile-gx)
3526         arch="tilegx"
3527     ;;
3528     i[3-6]86|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3529         arch="x86"
3530     ;;
3531 esac
3532
3533 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3534 enable $arch
3535
3536 # Add processor-specific flags
3537 if enabled aarch64; then
3538
3539     case $cpu in
3540         armv*)
3541             cpuflags="-march=$cpu"
3542         ;;
3543         *)
3544             cpuflags="-mcpu=$cpu"
3545         ;;
3546     esac
3547
3548 elif enabled alpha; then
3549
3550     cpuflags="-mcpu=$cpu"
3551
3552 elif enabled arm; then
3553
3554     check_arm_arch() {
3555         check_cpp_condition stddef.h \
3556             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3557             $cpuflags
3558     }
3559
3560     probe_arm_arch() {
3561         if   check_arm_arch 4;        then echo armv4;
3562         elif check_arm_arch 4T;       then echo armv4t;
3563         elif check_arm_arch 5;        then echo armv5;
3564         elif check_arm_arch 5E;       then echo armv5e;
3565         elif check_arm_arch 5T;       then echo armv5t;
3566         elif check_arm_arch 5TE;      then echo armv5te;
3567         elif check_arm_arch 5TEJ;     then echo armv5te;
3568         elif check_arm_arch 6;        then echo armv6;
3569         elif check_arm_arch 6J;       then echo armv6j;
3570         elif check_arm_arch 6K;       then echo armv6k;
3571         elif check_arm_arch 6Z;       then echo armv6z;
3572         elif check_arm_arch 6ZK;      then echo armv6zk;
3573         elif check_arm_arch 6T2;      then echo armv6t2;
3574         elif check_arm_arch 7;        then echo armv7;
3575         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3576         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3577         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3578         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3579         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3580         fi
3581     }
3582
3583     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3584
3585     case $cpu in
3586         armv*)
3587             cpuflags="-march=$cpu"
3588             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3589         ;;
3590         *)
3591             cpuflags="-mcpu=$cpu"
3592             case $cpu in
3593                 cortex-a*)                               subarch=armv7a  ;;
3594                 cortex-r*)                               subarch=armv7r  ;;
3595                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3596                 arm11*)                                  subarch=armv6   ;;
3597                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3598                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3599                 *)                             subarch=$(probe_arm_arch) ;;
3600             esac
3601         ;;
3602     esac
3603
3604     case "$subarch" in
3605         armv5t*)    enable fast_clz                ;;
3606         armv[6-8]*) enable fast_clz fast_unaligned ;;
3607     esac
3608
3609 elif enabled avr32; then
3610
3611     case $cpu in
3612         ap7[02]0[0-2])
3613             subarch="avr32_ap"
3614             cpuflags="-mpart=$cpu"
3615         ;;
3616         ap)
3617             subarch="avr32_ap"
3618             cpuflags="-march=$cpu"
3619         ;;
3620         uc3[ab]*)
3621             subarch="avr32_uc"
3622             cpuflags="-mcpu=$cpu"
3623         ;;
3624         uc)
3625             subarch="avr32_uc"
3626             cpuflags="-march=$cpu"
3627         ;;
3628     esac
3629
3630 elif enabled bfin; then
3631
3632     cpuflags="-mcpu=$cpu"
3633
3634 elif enabled mips; then
3635
3636     cpuflags="-march=$cpu"
3637
3638     case $cpu in
3639         24kc)
3640             disable mipsfpu
3641             disable mipsdspr1
3642             disable mipsdspr2
3643         ;;
3644         24kf*)
3645             disable mipsdspr1
3646             disable mipsdspr2
3647         ;;
3648         24kec|34kc|1004kc)
3649             disable mipsfpu
3650             disable mipsdspr2
3651         ;;
3652         24kef*|34kf*|1004kf*)
3653             disable mipsdspr2
3654         ;;
3655         74kc)
3656             disable mipsfpu
3657         ;;
3658     esac
3659
3660 elif enabled ppc; then
3661
3662     disable ldbrx
3663
3664     case $(tolower $cpu) in
3665         601|ppc601|powerpc601)
3666             cpuflags="-mcpu=601"
3667             disable altivec
3668         ;;
3669         603*|ppc603*|powerpc603*)
3670             cpuflags="-mcpu=603"
3671             disable altivec
3672         ;;
3673         604*|ppc604*|powerpc604*)
3674             cpuflags="-mcpu=604"
3675             disable altivec
3676         ;;
3677         g3|75*|ppc75*|powerpc75*)
3678             cpuflags="-mcpu=750"
3679             disable altivec
3680         ;;
3681         g4|745*|ppc745*|powerpc745*)
3682             cpuflags="-mcpu=7450"
3683         ;;
3684         74*|ppc74*|powerpc74*)
3685             cpuflags="-mcpu=7400"
3686         ;;
3687         g5|970|ppc970|powerpc970)
3688             cpuflags="-mcpu=970"
3689         ;;
3690         power[3-7]*)
3691             cpuflags="-mcpu=$cpu"
3692         ;;
3693         cell)
3694             cpuflags="-mcpu=cell"
3695             enable ldbrx
3696         ;;
3697         e500mc)
3698             cpuflags="-mcpu=e500mc"
3699             disable altivec
3700         ;;
3701         e500v2)
3702             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3703             disable altivec
3704             disable dcbzl
3705         ;;
3706         e500)
3707             cpuflags="-mcpu=8540 -mhard-float"
3708             disable altivec
3709             disable dcbzl
3710         ;;
3711     esac
3712
3713 elif enabled sparc; then
3714
3715     case $cpu in
3716         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3717             cpuflags="-mcpu=$cpu"
3718         ;;
3719         ultrasparc*|niagara[234])
3720             cpuflags="-mcpu=$cpu"
3721         ;;
3722     esac
3723
3724 elif enabled x86; then
3725
3726     case $cpu in
3727         i[345]86|pentium)
3728             cpuflags="-march=$cpu"
3729             disable mmx
3730         ;;
3731         # targets that do NOT support nopl and conditional mov (cmov)
3732         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3733             cpuflags="-march=$cpu"
3734             disable i686
3735         ;;
3736         # targets that do support nopl and conditional mov (cmov)
3737         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
3738         |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|amdfam10|barcelona|b[dt]ver*)
3739             cpuflags="-march=$cpu"
3740             enable i686
3741             enable fast_cmov
3742         ;;
3743         # targets that do support conditional mov but on which it's slow
3744         pentium4|pentium4m|prescott|nocona)
3745             cpuflags="-march=$cpu"
3746             enable i686
3747             disable fast_cmov
3748         ;;
3749     esac
3750
3751 fi
3752
3753 if [ "$cpu" != generic ]; then
3754     add_cflags  $cpuflags
3755     add_asflags $cpuflags
3756 fi
3757
3758 # compiler sanity check
3759 check_exec <<EOF
3760 int main(void){ return 0; }
3761 EOF
3762 if test "$?" != 0; then
3763     echo "$cc is unable to create an executable file."
3764     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3765         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3766         echo "Only do this if you know what cross compiling means."
3767     fi
3768     die "C compiler test failed."
3769 fi
3770
3771 add_cppflags -D_ISOC99_SOURCE
3772 add_cxxflags -D__STDC_CONSTANT_MACROS
3773 check_cflags -std=c99
3774 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3775 #include <stdlib.h>
3776 EOF
3777 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3778 #include <stdlib.h>
3779 EOF
3780
3781 add_host_cppflags -D_ISOC99_SOURCE
3782 check_host_cflags -std=c99
3783 check_host_cflags -Wall
3784 check_host_cflags -O3
3785
3786 check_64bit(){
3787     arch32=$1
3788     arch64=$2
3789     expr=$3
3790     check_code cc "" "int test[2*($expr) - 1]" &&
3791         subarch=$arch64 || subarch=$arch32
3792 }
3793
3794 case "$arch" in
3795     aarch64|alpha|ia64)
3796         spic=$shared
3797     ;;
3798     mips)
3799         check_64bit mips mips64 '_MIPS_SIM > 1'
3800         spic=$shared
3801     ;;
3802     parisc)
3803         check_64bit parisc parisc64 'sizeof(void *) > 4'
3804         spic=$shared
3805     ;;
3806     ppc)
3807         check_64bit ppc ppc64 'sizeof(void *) > 4'
3808         spic=$shared
3809     ;;
3810     s390)
3811         check_64bit s390 s390x 'sizeof(void *) > 4'
3812         spic=$shared
3813     ;;
3814     sparc)
3815         check_64bit sparc sparc64 'sizeof(void *) > 4'
3816         spic=$shared
3817     ;;
3818     x86)
3819         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3820         if test "$subarch" = "x86_64"; then
3821             spic=$shared
3822         fi
3823     ;;
3824     ppc)
3825         check_cc <<EOF && subarch="ppc64"
3826         int test[(int)sizeof(char*) - 7];
3827 EOF
3828     ;;
3829 esac
3830
3831 enable $subarch
3832 enabled spic && enable_weak pic
3833
3834 # OS specific
3835 case $target_os in
3836     aix)
3837         SHFLAGS=-shared
3838         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3839         enabled shared && add_ldflags -Wl,-brtl
3840         ;;
3841     haiku)
3842         prefix_default="/boot/common"
3843         network_extralibs="-lnetwork"
3844         host_libs=
3845         ;;
3846     sunos)
3847         SHFLAGS='-shared -Wl,-h,$$(@F)'
3848         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3849         network_extralibs="-lsocket -lnsl"
3850         # When using suncc to build, the Solaris linker will mark
3851         # an executable with each instruction set encountered by
3852         # the Solaris assembler.  As our libraries contain their own
3853         # guards for processor-specific code, instead suppress
3854         # generation of the HWCAPS ELF section on Solaris x86 only.
3855         enabled_all suncc x86 &&
3856             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3857             add_ldflags -Wl,-M,mapfile
3858         nm_default='nm -P -g'
3859         ;;
3860     netbsd)
3861         disable symver
3862         oss_indev_extralibs="-lossaudio"
3863         oss_outdev_extralibs="-lossaudio"
3864         enabled gcc || check_ldflags -Wl,-zmuldefs
3865         ;;
3866     openbsd|bitrig)
3867         disable symver
3868         SHFLAGS='-shared'
3869         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3870         SLIB_INSTALL_LINKS=
3871         oss_indev_extralibs="-lossaudio"
3872         oss_outdev_extralibs="-lossaudio"
3873         ;;
3874     dragonfly)
3875         disable symver
3876         ;;
3877     freebsd)
3878         ;;
3879     bsd/os)
3880         add_extralibs -lpoll -lgnugetopt
3881         strip="strip -d"
3882         ;;
3883     darwin)
3884         test "${as#*gas-preprocessor.pl}" != "$as" || gas="${gas:=gas-preprocessor.pl} ${as:=$cc}"
3885         enabled ppc && add_asflags -force_cpusubtype_ALL
3886         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3887         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3888         strip="${strip} -x"
3889         add_ldflags -Wl,-dynamic,-search_paths_first
3890         SLIBSUF=".dylib"
3891         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3892         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3893         objformat="macho"
3894         enabled x86_64 && objformat="macho64"
3895         enabled_any pic shared ||
3896             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3897         ;;
3898     mingw32*)
3899         if test $target_os = "mingw32ce"; then
3900             disable network
3901         else
3902             target_os=mingw32
3903         fi
3904         LIBTARGET=i386
3905         if enabled x86_64; then
3906             LIBTARGET="i386:x86-64"
3907         elif enabled arm; then
3908             LIBTARGET=arm-wince
3909         fi
3910         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3911         check_ldflags -Wl,--nxcompat
3912         check_ldflags -Wl,--dynamicbase
3913         shlibdir_default="$bindir_default"
3914         SLIBPREF=""
3915         SLIBSUF=".dll"
3916         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3917         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3918         dlltool="${cross_prefix}dlltool"
3919         if check_cmd lib.exe -list; then
3920             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3921             if enabled x86_64; then
3922                 LIBTARGET=x64
3923             fi
3924         elif check_cmd $dlltool --version; then
3925             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3926         fi
3927         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3928         SLIB_INSTALL_LINKS=
3929         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3930         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3931         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3932         objformat="win32"
3933         ranlib=:
3934         enable dos_paths
3935         ;;
3936     win32|win64)
3937         disable symver
3938         if enabled shared; then
3939             # Link to the import library instead of the normal static library
3940             # for shared libs.
3941             LD_LIB='%.lib'
3942             # Cannot build both shared and static libs with MSVC or icl.
3943             disable static
3944         fi
3945         shlibdir_default="$bindir_default"
3946         SLIBPREF=""
3947         SLIBSUF=".dll"
3948         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3949         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3950         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3951         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3952         SLIB_INSTALL_LINKS=
3953         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3954         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3955         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3956         objformat="win32"
3957         ranlib=:
3958         enable dos_paths
3959         ;;
3960     cygwin*)
3961         target_os=cygwin
3962         shlibdir_default="$bindir_default"
3963         SLIBPREF="cyg"
3964         SLIBSUF=".dll"
3965         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3966         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3967         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3968         SLIB_INSTALL_LINKS=
3969         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3970         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3971         objformat="win32"
3972         enable dos_paths
3973         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3974         ;;
3975     *-dos|freedos|opendos)
3976         network_extralibs="-lsocket"
3977         objformat="coff"
3978         enable dos_paths
3979         add_cppflags -U__STRICT_ANSI__
3980         ;;
3981     linux)
3982         enable dv1394
3983         ;;
3984     irix*)
3985         target_os=irix
3986         ranlib="echo ignoring ranlib"
3987         ;;
3988     os/2*)
3989         strip="lxlite -CS"
3990         ln_s="cp -f"
3991         objformat="aout"
3992         add_cppflags -D_GNU_SOURCE
3993         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3994         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3995         LIBSUF="_s.a"
3996         SLIBPREF=""
3997         SLIBSUF=".dll"
3998         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3999         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4000         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4001             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
4002             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4003             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4004             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4005             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
4006         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4007             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4008         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4009         enable dos_paths
4010         enable_weak os2threads
4011         ;;
4012     gnu/kfreebsd)
4013         add_cppflags -D_BSD_SOURCE
4014         ;;
4015     gnu)
4016         ;;
4017     qnx)
4018         add_cppflags -D_QNX_SOURCE
4019         network_extralibs="-lsocket"
4020         ;;
4021     symbian)
4022         SLIBSUF=".dll"
4023         enable dos_paths
4024         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4025         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4026         add_ldflags -Wl,--target1-abs,--no-undefined \
4027                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4028                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4029         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4030                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4031                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4032         ;;
4033     osf1)
4034         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4035         ;;
4036     minix)
4037         ;;
4038     plan9)
4039         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
4040                      -D_REENTRANT_SOURCE        \
4041                      -D_RESEARCH_SOURCE         \
4042                      -DFD_SETSIZE=96            \
4043                      -DHAVE_SOCK_OPTS
4044         add_compat strtod.o strtod=avpriv_strtod
4045         network_extralibs='-lbsd'
4046         exeobjs=compat/plan9/main.o
4047         disable ffserver
4048         cp_f='cp'
4049         ;;
4050     none)
4051         ;;
4052     *)
4053         die "Unknown OS '$target_os'."
4054         ;;
4055 esac
4056
4057 # determine libc flavour
4058
4059 probe_libc(){
4060     pfx=$1
4061     pfx_no_=${pfx%_}
4062     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4063     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4064         eval ${pfx}libc_type=uclibc
4065         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4066     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4067         eval ${pfx}libc_type=glibc
4068         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4069     # MinGW headers can be installed on Cygwin, so check for newlib first.
4070     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4071         eval ${pfx}libc_type=newlib
4072         add_${pfx}cppflags -U__STRICT_ANSI__
4073     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4074     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4075         eval ${pfx}libc_type=mingw64
4076         if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
4077             add_compat msvcrt/snprintf.o
4078             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
4079         fi
4080         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4081         eval test \$${pfx_no_}cc_type = "gcc" &&
4082             add_${pfx}cppflags -D__printf__=__gnu_printf__
4083     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4084          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4085         eval ${pfx}libc_type=mingw32
4086         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4087             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4088             die "ERROR: MinGW32 runtime version must be >= 3.15."
4089         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4090         eval test \$${pfx_no_}cc_type = "gcc" &&
4091             add_${pfx}cppflags -D__printf__=__gnu_printf__
4092     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4093         eval ${pfx}libc_type=msvcrt
4094         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4095         # 0x601 by default unless something else is set by the user.
4096         # This can easily lead to us detecting functions only present
4097         # in such new versions and producing binaries requiring windows 7.0.
4098         # Therefore explicitly set the default to XP unless the user has
4099         # set something else on the command line.
4100         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4101             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
4102     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4103         eval ${pfx}libc_type=klibc
4104     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4105         eval ${pfx}libc_type=bionic
4106     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4107         eval ${pfx}libc_type=solaris
4108         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4109     fi
4110 }
4111
4112 probe_libc
4113 test -n "$libc_type" && enable libc_$libc_type
4114 probe_libc host_
4115 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4116
4117 case $libc_type in
4118     bionic)
4119         add_compat strtod.o strtod=avpriv_strtod
4120         ;;
4121     msvcrt)
4122         add_compat strtod.o strtod=avpriv_strtod
4123         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4124                                      _snprintf=avpriv_snprintf  \
4125                                      vsnprintf=avpriv_vsnprintf
4126         ;;
4127 esac
4128
4129 # hacks for compiler/libc/os combinations
4130
4131 if enabled_all tms470 libc_glibc; then
4132     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4133     add_cppflags -D__USER_LABEL_PREFIX__=
4134     add_cppflags -D__builtin_memset=memset
4135     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4136     add_cflags   -pds=48    # incompatible redefinition of macro
4137 fi
4138
4139 if enabled_all ccc libc_glibc; then
4140     add_ldflags -Wl,-z,now  # calls to libots crash without this
4141 fi
4142
4143 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4144     add_cppflags '-I\$(SRC_PATH)/compat/float'
4145
4146 esc(){
4147     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4148 }
4149
4150 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
4151
4152 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4153
4154 set_default $PATHS_LIST
4155 set_default nm
4156
4157 # we need to build at least one lib type
4158 if ! enabled_any static shared; then
4159     cat <<EOF
4160 At least one library type must be built.
4161 Specify --enable-static to build the static libraries or --enable-shared to
4162 build the shared libraries as well. To only build the shared libraries specify
4163 --disable-static in addition to --enable-shared.
4164 EOF
4165     exit 1;
4166 fi
4167
4168 die_license_disabled() {
4169     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4170 }
4171
4172 die_license_disabled_gpl() {
4173     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
4174 }
4175
4176 die_license_disabled gpl frei0r
4177 die_license_disabled gpl libcdio
4178 die_license_disabled gpl libutvideo
4179 die_license_disabled gpl libvidstab
4180 die_license_disabled gpl libx264
4181 die_license_disabled gpl libx265
4182 die_license_disabled gpl libxavs
4183 die_license_disabled gpl libxvid
4184 die_license_disabled gpl libzvbi
4185 die_license_disabled gpl x11grab
4186
4187 die_license_disabled nonfree libaacplus
4188 die_license_disabled nonfree libfaac
4189 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
4190 enabled gpl && die_license_disabled_gpl nonfree openssl
4191
4192 die_license_disabled version3 libopencore_amrnb
4193 die_license_disabled version3 libopencore_amrwb
4194 die_license_disabled version3 libvo_aacenc
4195 die_license_disabled version3 libvo_amrwbenc
4196
4197 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4198
4199 disabled optimizations || check_cflags -fomit-frame-pointer
4200
4201 enable_weak_pic() {
4202     disabled pic && return
4203     enable pic
4204     add_cppflags -DPIC
4205     case "$target_os" in
4206     mingw*|cygwin*)
4207         ;;
4208     *)
4209         add_cflags -fPIC
4210         ;;
4211     esac
4212     add_asflags  -fPIC
4213 }
4214
4215 enabled pic && enable_weak_pic
4216
4217 check_cc <<EOF || die "Symbol mangling check failed."
4218 int ff_extern;
4219 EOF
4220 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4221 extern_prefix=${sym%%ff_extern*}
4222
4223 check_cc <<EOF && enable_weak inline_asm
4224 void foo(void) { __asm__ volatile ("" ::); }
4225 EOF
4226
4227 _restrict=
4228 for restrict_keyword in restrict __restrict__ __restrict; do
4229     check_cc <<EOF && _restrict=$restrict_keyword && break
4230 void foo(char * $restrict_keyword p);
4231 EOF
4232 done
4233
4234 check_cc <<EOF && enable pragma_deprecated
4235 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4236 EOF
4237
4238 check_cc <<EOF && enable attribute_packed
4239 struct { int x; } __attribute__((packed)) x;
4240 EOF
4241
4242 check_cc <<EOF && enable attribute_may_alias
4243 union { int x; } __attribute__((may_alias)) x;
4244 EOF
4245
4246 check_cc <<EOF || die "endian test failed"
4247 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4248 EOF
4249 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4250
4251 check_inline_asm inline_asm_labels '"1:\n"'
4252
4253 check_inline_asm inline_asm_nonlocal_labels '"Label:\n"'
4254
4255 if enabled aarch64; then
4256     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4257     # internal assembler in clang 3.3 does not support this instruction
4258     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4259     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4260
4261     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4262
4263 elif enabled alpha; then
4264
4265     check_cflags -mieee
4266
4267 elif enabled arm; then
4268
4269     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
4270 float func(float a, float b){ return a+b; }
4271 EOF
4272
4273     enabled thumb && check_cflags -mthumb || check_cflags -marm
4274     nogas=die
4275
4276     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4277         enable vfp_args
4278     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
4279         case "${cross_prefix:-$cc}" in
4280             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4281             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4282 __asm__ (".eabi_attribute 28, 1");
4283 int main(void) { return 0; }
4284 EOF
4285         esac
4286         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4287     fi
4288
4289     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4290     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4291     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4292     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4293     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4294     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4295
4296     [ $target_os = linux ] ||
4297         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4298             $ARCH_EXT_LIST_ARM
4299
4300     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4301
4302     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4303
4304 elif enabled mips; then
4305
4306     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4307     enabled mips32r2  && add_cflags "-mips32r2" && add_asflags "-mips32r2" &&
4308      check_inline_asm mips32r2  '"rotr $t0, $t1, 1"'
4309     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
4310      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
4311     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
4312      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
4313     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
4314      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
4315
4316 elif enabled parisc; then
4317
4318     if enabled gcc; then
4319         case $($cc -dumpversion) in
4320             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4321         esac
4322     fi
4323
4324 elif enabled ppc; then
4325
4326     enable local_aligned_8 local_aligned_16 local_aligned_32
4327
4328     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4329     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4330     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4331     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4332
4333     # AltiVec flags: The FSF version of GCC differs from the Apple version
4334     if enabled altivec; then
4335         if ! enabled_any pic ppc64; then
4336             nogas=warn
4337         fi
4338         check_cflags -maltivec -mabi=altivec &&
4339         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4340         check_cflags -faltivec
4341
4342         # check if our compiler supports Motorola AltiVec C API
4343         check_cc <<EOF || disable altivec
4344 $inc_altivec_h
4345 int main(void) {
4346     vector signed int v1 = (vector signed int) { 0 };
4347     vector signed int v2 = (vector signed int) { 1 };
4348     v1 = vec_add(v1, v2);
4349     return 0;
4350 }
4351 EOF
4352
4353         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4354     fi
4355
4356 elif enabled x86; then
4357
4358     check_builtin rdtsc    intrin.h   "__rdtsc()"
4359     check_builtin mm_empty mmintrin.h "_mm_empty()"
4360
4361     enable local_aligned_8 local_aligned_16 local_aligned_32
4362
4363     # check whether EBP is available on x86
4364     # As 'i' is stored on the stack, this program will crash
4365     # if the base pointer is used to access it because the
4366     # base pointer is cleared in the inline assembly code.
4367     check_exec_crash <<EOF && enable ebp_available
4368 volatile int i=0;
4369 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4370 return i;
4371 EOF
4372
4373     # check whether EBX is available on x86
4374     check_inline_asm ebx_available '""::"b"(0)' &&
4375         check_inline_asm ebx_available '"":::"%ebx"'
4376
4377     # check whether xmm clobbers are supported
4378     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4379
4380     check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test, %eax"' ||
4381         check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test(%rip), %eax"'
4382
4383     # check whether binutils is new enough to compile SSSE3/MMXEXT
4384     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4385     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4386
4387     if ! disabled_any asm mmx yasm; then
4388         if check_cmd $yasmexe --version; then
4389             enabled x86_64 && yasm_extra="-m amd64"
4390             yasm_debug="-g dwarf2"
4391         elif check_cmd nasm -v; then
4392             yasmexe=nasm
4393             yasm_debug="-g -F dwarf"
4394             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4395         fi
4396
4397         YASMFLAGS="-f $objformat $yasm_extra"
4398         enabled pic               && append YASMFLAGS "-DPIC"
4399         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4400         case "$objformat" in
4401             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4402         esac
4403
4404         check_yasm "movbe ecx, [5]" && enable yasm ||
4405             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4406         check_yasm "vextractf128 xmm0, ymm0, 0"      || disable avx_external avresample
4407         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4408         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4409         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4410         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4411         check_yasm "CPU amdnop" || disable cpunop
4412     fi
4413
4414     case "$cpu" in
4415         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4416             disable fast_clz
4417         ;;
4418     esac
4419
4420 fi
4421
4422 if enabled asm; then
4423     as=${gas:=$as}
4424     check_as <<EOF && enable gnu_as || \
4425         $nogas "GNU assembler not found, install gas-preprocessor"
4426 .macro m n
4427 \n: .int 0
4428 .endm
4429 m x
4430 EOF
4431 fi
4432
4433 check_ldflags -Wl,--as-needed
4434
4435 if check_func dlopen; then
4436     ldl=
4437 elif check_func dlopen -ldl; then
4438     ldl=-ldl
4439 fi
4440
4441 if ! disabled network; then
4442     check_func getaddrinfo $network_extralibs
4443     check_func getservbyport $network_extralibs
4444     check_func inet_aton $network_extralibs
4445
4446     check_type netdb.h "struct addrinfo"
4447     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4448     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4449     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4450     check_type poll.h "struct pollfd"
4451     check_type netinet/sctp.h "struct sctp_event_subscribe"
4452     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4453     check_type netinet/in.h "struct sockaddr_in6"
4454     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4455     check_type "sys/types.h sys/socket.h" socklen_t
4456
4457     # Prefer arpa/inet.h over winsock2
4458     if check_header arpa/inet.h ; then
4459         check_func closesocket
4460     elif check_header winsock2.h ; then
4461         check_func_headers winsock2.h closesocket -lws2 &&
4462             network_extralibs="-lws2" ||
4463         { check_func_headers winsock2.h closesocket -lws2_32 &&
4464             network_extralibs="-lws2_32"; } || disable winsock2_h network
4465         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4466
4467         check_type ws2tcpip.h socklen_t
4468         check_type ws2tcpip.h "struct addrinfo"
4469         check_type ws2tcpip.h "struct group_source_req"
4470         check_type ws2tcpip.h "struct ip_mreq_source"
4471         check_type ws2tcpip.h "struct ipv6_mreq"
4472         check_type winsock2.h "struct pollfd"
4473         check_struct winsock2.h "struct sockaddr" sa_len
4474         check_type ws2tcpip.h "struct sockaddr_in6"
4475         check_type ws2tcpip.h "struct sockaddr_storage"
4476     else
4477         disable network
4478     fi
4479 fi
4480
4481 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4482 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4483 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4484 check_builtin sarestart signal.h "SA_RESTART"
4485 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4486
4487 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4488 check_func  ${malloc_prefix}memalign            && enable memalign
4489 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4490
4491 check_func  access
4492 check_func  clock_gettime || { check_func clock_gettime -lrt && add_extralibs -lrt; }
4493 check_func  fcntl
4494 check_func  fork
4495 check_func  gethrtime
4496 check_func  getopt
4497 check_func  getrusage
4498 check_func  gettimeofday
4499 check_func  isatty
4500 check_func  localtime_r
4501 check_func  mach_absolute_time
4502 check_func  mkstemp
4503 check_func  mmap
4504 check_func  mprotect
4505 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4506 check_func  nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
4507 check_func  sched_getaffinity
4508 check_func  setrlimit
4509 check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE
4510 check_func  strerror_r
4511 check_func  sysconf
4512 check_func  sysctl
4513 check_func  usleep
4514
4515 check_func_headers conio.h kbhit
4516 check_func_headers io.h setmode
4517 check_func_headers lzo/lzo1x.h lzo1x_999_compress
4518 check_func_headers stdlib.h getenv
4519
4520 check_func_headers windows.h CoTaskMemFree -lole32
4521 check_func_headers windows.h GetProcessAffinityMask
4522 check_func_headers windows.h GetProcessTimes
4523 check_func_headers windows.h GetSystemTimeAsFileTime
4524 check_func_headers windows.h MapViewOfFile
4525 check_func_headers windows.h PeekNamedPipe
4526 check_func_headers windows.h SetConsoleTextAttribute
4527 check_func_headers windows.h Sleep
4528 check_func_headers windows.h VirtualAlloc
4529 check_func_headers glob.h glob
4530 enabled xlib &&
4531     check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
4532
4533 check_header cl/cl.h
4534 check_header direct.h
4535 check_header dlfcn.h
4536 check_header dxva.h
4537 check_header dxva2api.h -D_WIN32_WINNT=0x0600
4538 check_header io.h
4539 check_header libcrystalhd/libcrystalhd_if.h
4540 check_header mach/mach_time.h
4541 check_header malloc.h
4542 check_header poll.h
4543 check_header sys/mman.h
4544 check_header sys/param.h
4545 check_header sys/resource.h
4546 check_header sys/select.h
4547 check_header sys/time.h
4548 check_header sys/un.h
4549 check_header termios.h
4550 check_header unistd.h
4551 check_header vdpau/vdpau.h
4552 check_header vdpau/vdpau_x11.h
4553 check_header VideoDecodeAcceleration/VDADecoder.h
4554 check_header windows.h
4555 check_header X11/extensions/XvMClib.h
4556 check_header asm/types.h
4557
4558 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4559 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4560 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4561
4562 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4563
4564 if ! disabled w32threads && ! enabled pthreads; then
4565     check_func_headers "windows.h process.h" _beginthreadex &&
4566         enable w32threads || disable w32threads
4567 fi
4568
4569 # check for some common methods of building with pthread support
4570 # do this before the optional library checks as some of them require pthreads
4571 if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
4572     enable pthreads
4573     if check_func pthread_join -pthread && check_func pthread_create -pthread; then
4574         add_cflags -pthread
4575         add_extralibs -pthread
4576     elif check_func pthread_join -pthreads && check_func pthread_create -pthreads; then
4577         add_cflags -pthreads
4578         add_extralibs -pthreads
4579     elif check_func pthread_join -lpthreadGC2 && check_func pthread_create -lpthreadGC2; then
4580         add_extralibs -lpthreadGC2
4581     elif check_lib pthread.h pthread_join -lpthread && check_lib pthread.h pthread_create -lpthread; then
4582         :
4583     elif ! check_func pthread_join && ! check_func pthread_create; then
4584         disable pthreads
4585     fi
4586     check_code cc "pthread.h" "static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER" || disable pthreads
4587 fi
4588
4589
4590 if enabled pthreads; then
4591   check_func pthread_cancel
4592 fi
4593
4594 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4595 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4596
4597 check_lib math.h sin -lm && LIBM="-lm"
4598 disabled crystalhd || check_lib libcrystalhd/libcrystalhd_if.h DtsCrystalHDVersion -lcrystalhd || disable crystalhd
4599
4600 atan2f_args=2
4601 ldexpf_args=2
4602 powf_args=2
4603
4604 for func in $MATH_FUNCS; do
4605     eval check_mathfunc $func \${${func}_args:-1}
4606 done
4607
4608 # these are off by default, so fail if requested and not available
4609 enabled avfoundation_indev && { check_header_oc AVFoundation/AVFoundation.h || disable avfoundation_indev; }
4610 enabled avisynth          && { { check_lib2 "windows.h" LoadLibrary; } ||
4611                                { check_lib2 "dlfcn.h" dlopen -ldl; } ||
4612                                die "ERROR: LoadLibrary/dlopen not found for avisynth"; }
4613 enabled decklink          && { check_header DeckLinkAPI.h || die "ERROR: DeckLinkAPI.h header not found"; }
4614 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4615 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4616 enabled ladspa            && { check_header ladspa.h || die "ERROR: ladspa.h header not found"; }
4617 enabled libiec61883       && require libiec61883 libiec61883/iec61883.h iec61883_cmp_connect -lraw1394 -lavc1394 -lrom1394 -liec61883
4618 enabled libaacplus        && require "libaacplus >= 2.0.0" aacplus.h aacplusEncOpen -laacplus
4619 enabled libass            && require_pkg_config libass ass/ass.h ass_library_init
4620 enabled libbluray         && require_pkg_config libbluray libbluray/bluray.h bd_open
4621 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4622 enabled libcelt           && require libcelt celt/celt.h celt_decode -lcelt0 &&
4623                              { check_lib celt/celt.h celt_decoder_create_custom -lcelt0 ||
4624                                die "ERROR: libcelt must be installed and version must be >= 0.11.0."; }
4625 enabled libcaca           && require_pkg_config caca caca.h caca_create_canvas
4626 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4627 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
4628 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"
4629 enabled libflite          && require2 libflite "flite/flite.h" flite_init $flite_libs
4630 enabled fontconfig        && enable libfontconfig
4631 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4632 enabled libfreetype       && require_libfreetype
4633 enabled libgme            && require  libgme gme/gme.h gme_new_emu -lgme -lstdc++
4634 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4635                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4636                                done || die "ERROR: libgsm not found"; }
4637 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4638 enabled libmodplug        && require libmodplug libmodplug/modplug.h ModPlug_Load -lmodplug
4639 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4640 enabled libnut            && require libnut libnut.h nut_demuxer_init -lnut
4641 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4642 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4643 enabled libopencv         && require_pkg_config opencv opencv/cxcore.h cvCreateImageHeader
4644 enabled libopenjpeg       && { check_lib openjpeg-1.5/openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4645                                check_lib openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4646                                die "ERROR: libopenjpeg not found"; }
4647 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4648 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4649 enabled libquvi           && require_pkg_config libquvi quvi/quvi.h quvi_init
4650 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4651 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4652 enabled libshine          && require_pkg_config shine shine/layer3.h shine_encode_buffer
4653 enabled libsoxr           && require libsoxr soxr.h soxr_create -lsoxr
4654 enabled libssh            && require_pkg_config libssh libssh/sftp.h sftp_init
4655 enabled libspeex          && require libspeex speex/speex.h speex_decoder_init -lspeex
4656 enabled libstagefright_h264 && require_cpp libstagefright_h264 "binder/ProcessState.h media/stagefright/MetaData.h
4657     media/stagefright/MediaBufferGroup.h media/stagefright/MediaDebug.h media/stagefright/MediaDefs.h
4658     media/stagefright/OMXClient.h media/stagefright/OMXCodec.h" android::OMXClient -lstagefright -lmedia -lutils -lbinder -lgnustl_static
4659 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4660 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame &&
4661                              { check_lib twolame.h twolame_encode_buffer_float32_interleaved -ltwolame ||
4662                                die "ERROR: libtwolame must be installed and version must be >= 0.3.10"; }
4663 enabled libutvideo        && require_cpp utvideo "stdint.h stdlib.h utvideo/utvideo.h utvideo/Codec.h" 'CCodec*' -lutvideo -lstdc++
4664 enabled libv4l2           && require_pkg_config libv4l2 libv4l2.h v4l2_ioctl
4665 enabled libvidstab        && require_pkg_config "vidstab >= 0.98" vid.stab/libvidstab.h vsMotionDetectInit
4666 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4667 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4668 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4669 enabled libvpx            && {
4670     enabled libvpx_vp8_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
4671                                     die "ERROR: libvpx decoder version must be >=0.9.1"; }
4672     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 ||
4673                                     die "ERROR: libvpx encoder version must be >=0.9.7"; }
4674     enabled libvpx_vp9_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx" -lvpx || disable libvpx_vp9_decoder; }
4675     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; } }
4676 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4677 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4678 enabled libx264           && require libx264 x264.h x264_encoder_encode -lx264 &&
4679                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4680                                die "ERROR: libx264 must be installed and version must be >= 0.118."; }
4681 enabled libx265           && require_pkg_config x265 x265.h x265_encoder_encode &&
4682                              { check_cpp_condition x265.h "X265_BUILD >= 13" ||
4683                                die "ERROR: libx265 version must be >= 13."; }
4684 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4685 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4686 enabled libzmq            && require_pkg_config libzmq zmq.h zmq_ctx_new
4687 enabled libzvbi           && require libzvbi libzvbi.h vbi_decoder_new -lzvbi
4688 enabled openal            && { { for al_libs in "${OPENAL_LIBS}" "-lopenal" "-lOpenAL32"; do
4689                                check_lib 'AL/al.h' alGetError "${al_libs}" && break; done } ||
4690                                die "ERROR: openal not found"; } &&
4691                              { check_cpp_condition "AL/al.h" "defined(AL_VERSION_1_1)" ||
4692                                die "ERROR: openal must be installed and version must be 1.1 or compatible"; }
4693 enabled opencl            && { check_lib2 OpenCL/cl.h clEnqueueNDRangeKernel -Wl,-framework,OpenCL ||
4694                                check_lib2 CL/cl.h clEnqueueNDRangeKernel -lOpenCL ||
4695                                die "ERROR: opencl not found"; } &&
4696                              { check_cpp_condition "OpenCL/cl.h" "defined(CL_VERSION_1_2)" ||
4697                                check_cpp_condition "CL/cl.h" "defined(CL_VERSION_1_2)" ||
4698                                die "ERROR: opencl must be installed and version must be 1.2 or compatible"; }
4699 enabled opengl            && { check_lib GL/glx.h glXGetProcAddress "-lGL" ||
4700                                check_lib2 windows.h wglGetProcAddress "-lopengl32 -lgdi32" ||
4701                                check_lib2 OpenGL/gl3.h glGetError "-Wl,-framework,OpenGL" ||
4702                                check_lib2 ES2/gl.h glGetError "-isysroot=${sysroot} -Wl,-framework,OpenGLES" ||
4703                                die "ERROR: opengl not found."
4704                              }
4705 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4706                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4707                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4708                                die "ERROR: openssl not found"; }
4709 enabled qtkit_indev      && { check_header_oc QTKit/QTKit.h || disable qtkit_indev; }
4710
4711 if enabled gnutls; then
4712     { check_lib nettle/bignum.h nettle_mpz_get_str_256 -lnettle -lhogweed -lgmp && enable nettle; } ||
4713     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4714 fi
4715
4716 # libdc1394 check
4717 if enabled libdc1394; then
4718     { check_lib dc1394/dc1394.h dc1394_new -ldc1394 -lraw1394 &&
4719         enable libdc1394_2; } ||
4720     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4721         enable libdc1394_1; } ||
4722     die "ERROR: No version of libdc1394 found "
4723 fi
4724
4725 SDL_CONFIG="${cross_prefix}sdl-config"
4726 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4727     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4728     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4729     enable sdl
4730 else
4731   if "${SDL_CONFIG}" --version > /dev/null 2>&1; then
4732     sdl_cflags=$("${SDL_CONFIG}" --cflags)
4733     sdl_libs=$("${SDL_CONFIG}" --libs)
4734     check_func_headers SDL_version.h SDL_Linked_Version $sdl_cflags $sdl_libs &&
4735     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4736     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4737     enable sdl
4738   fi
4739 fi
4740 enabled sdl && add_cflags $sdl_cflags && add_extralibs $sdl_libs
4741
4742 texi2html --help 2> /dev/null | grep -q 'init-file' && enable texi2html || disable texi2html
4743 makeinfo --version > /dev/null 2>&1 && enable makeinfo  || disable makeinfo
4744 perl -v            > /dev/null 2>&1 && enable perl      || disable perl
4745 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4746 rsync --help 2> /dev/null | grep -q 'contimeout' && enable rsync_contimeout || disable rsync_contimeout
4747
4748 check_header linux/fb.h
4749 check_header linux/videodev.h
4750 check_header linux/videodev2.h
4751 check_code cc linux/videodev2.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_safe struct_v4l2_frmivalenum_discrete
4752
4753 check_header sys/videoio.h
4754
4755 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4756 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4757 # w32api 3.12 had it defined wrong
4758 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4759
4760 check_type "dshow.h" IBaseFilter
4761
4762 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4763 { check_header dev/bktr/ioctl_meteor.h &&
4764   check_header dev/bktr/ioctl_bt848.h; } ||
4765 { check_header machine/ioctl_meteor.h &&
4766   check_header machine/i