configure: add missing dependency for the remuxing example
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # FFmpeg configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN FFMPEG, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken FFmpeg."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --fatal-warnings         fail if any configure warning is generated
82   --prefix=PREFIX          install in PREFIX [$prefix]
83   --bindir=DIR             install binaries in DIR [PREFIX/bin]
84   --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]
85   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]
86   --libdir=DIR             install libs in DIR [PREFIX/lib]
87   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
88   --incdir=DIR             install includes in DIR [PREFIX/include]
89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
90   --enable-rpath           use rpath to allow installing libraries in paths
91                            not part of the dynamic linker search path
92
93 Licensing options:
94   --enable-gpl             allow use of GPL code, the resulting libs
95                            and binaries will be under GPL [no]
96   --enable-version3        upgrade (L)GPL to version 3 [no]
97   --enable-nonfree         allow use of nonfree code, the resulting libs
98                            and binaries will be unredistributable [no]
99
100 Configuration options:
101   --disable-static         do not build static libraries [no]
102   --enable-shared          build shared libraries [no]
103   --enable-small           optimize for size instead of speed
104   --disable-runtime-cpudetect disable detecting cpu capabilities at runtime (smaller binary)
105   --enable-gray            enable full grayscale support (slower color)
106   --disable-swscale-alpha  disable alpha channel support in swscale
107   --disable-all            disable building components, libraries and programs
108   --enable-incompatible-libav-abi enable incompatible Libav fork ABI [no]
109   --enable-incompatible-fork-abi  enable incompatible Libav fork ABI (deprecated) [no]
110   --enable-raise-major     increase major version numbers in sonames [no]
111
112 Program options:
113   --disable-programs       do not build command line programs
114   --disable-ffmpeg         disable ffmpeg build
115   --disable-ffplay         disable ffplay build
116   --disable-ffprobe        disable ffprobe build
117   --disable-ffserver       disable ffserver build
118
119 Documentation options:
120   --disable-doc            do not build documentation
121   --disable-htmlpages      do not build HTML documentation pages
122   --disable-manpages       do not build man documentation pages
123   --disable-podpages       do not build POD documentation pages
124   --disable-txtpages       do not build text documentation pages
125
126 Component options:
127   --disable-avdevice       disable libavdevice build
128   --disable-avcodec        disable libavcodec build
129   --disable-avformat       disable libavformat build
130   --disable-avutil         disable libavutil build
131   --disable-swresample     disable libswresample build
132   --disable-swscale        disable libswscale build
133   --disable-postproc       disable libpostproc build
134   --disable-avfilter       disable libavfilter build
135   --enable-avresample      enable libavresample build [no]
136   --disable-pthreads       disable pthreads [auto]
137   --disable-w32threads     disable Win32 threads [auto]
138   --disable-os2threads     disable OS/2 threads [auto]
139   --disable-network        disable network support [no]
140   --disable-dct            disable DCT code
141   --disable-dwt            disable DWT code
142   --disable-error-resilience disable error resilience code
143   --disable-lsp            disable LSP code
144   --disable-lzo            disable LZO decoder code
145   --disable-mdct           disable MDCT code
146   --disable-rdft           disable RDFT code
147   --disable-fft            disable FFT code
148
149 Hardware accelerators:
150   --disable-dxva2          disable DXVA2 code [autodetect]
151   --disable-vaapi          disable VAAPI code [autodetect]
152   --enable-vda             enable VDA code
153   --disable-vdpau          disable VDPAU code [autodetect]
154
155 Individual component options:
156   --disable-everything     disable all components listed below
157   --disable-encoder=NAME   disable encoder NAME
158   --enable-encoder=NAME    enable encoder NAME
159   --disable-encoders       disable all encoders
160   --disable-decoder=NAME   disable decoder NAME
161   --enable-decoder=NAME    enable decoder NAME
162   --disable-decoders       disable all decoders
163   --disable-hwaccel=NAME   disable hwaccel NAME
164   --enable-hwaccel=NAME    enable hwaccel NAME
165   --disable-hwaccels       disable all hwaccels
166   --disable-muxer=NAME     disable muxer NAME
167   --enable-muxer=NAME      enable muxer NAME
168   --disable-muxers         disable all muxers
169   --disable-demuxer=NAME   disable demuxer NAME
170   --enable-demuxer=NAME    enable demuxer NAME
171   --disable-demuxers       disable all demuxers
172   --enable-parser=NAME     enable parser NAME
173   --disable-parser=NAME    disable parser NAME
174   --disable-parsers        disable all parsers
175   --enable-bsf=NAME        enable bitstream filter NAME
176   --disable-bsf=NAME       disable bitstream filter NAME
177   --disable-bsfs           disable all bitstream filters
178   --enable-protocol=NAME   enable protocol NAME
179   --disable-protocol=NAME  disable protocol NAME
180   --disable-protocols      disable all protocols
181   --enable-indev=NAME      enable input device NAME
182   --disable-indev=NAME     disable input device NAME
183   --disable-indevs         disable input devices
184   --enable-outdev=NAME     enable output device NAME
185   --disable-outdev=NAME    disable output device NAME
186   --disable-outdevs        disable output devices
187   --disable-devices        disable all devices
188   --enable-filter=NAME     enable filter NAME
189   --disable-filter=NAME    disable filter NAME
190   --disable-filters        disable all filters
191
192 External library support:
193   --enable-avisynth        enable reading of AviSynth script files [no]
194   --disable-bzlib          disable bzlib [autodetect]
195   --enable-fontconfig      enable fontconfig
196   --enable-frei0r          enable frei0r video filtering
197   --enable-gnutls          enable gnutls [no]
198   --disable-iconv          disable iconv [autodetect]
199   --enable-ladspa          enable LADSPA audio filtering
200   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
201   --enable-libass          enable libass subtitles rendering [no]
202   --enable-libbluray       enable BluRay reading using libbluray [no]
203   --enable-libcaca         enable textual display using libcaca
204   --enable-libcelt         enable CELT decoding via libcelt [no]
205   --enable-libcdio         enable audio CD grabbing with libcdio
206   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
207                            and libraw1394 [no]
208   --enable-libfaac         enable AAC encoding via libfaac [no]
209   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
210   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
211   --enable-libfreetype     enable libfreetype [no]
212   --enable-libgme          enable Game Music Emu via libgme [no]
213   --enable-libgsm          enable GSM de/encoding via libgsm [no]
214   --enable-libiec61883     enable iec61883 via libiec61883 [no]
215   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
216   --enable-libmodplug      enable ModPlug via libmodplug [no]
217   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
218   --enable-libnut          enable NUT (de)muxing via libnut,
219                            native (de)muxer exists [no]
220   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
221   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
222   --enable-libopencv       enable video filtering via libopencv [no]
223   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
224   --enable-libopus         enable Opus decoding via libopus [no]
225   --enable-libpulse        enable Pulseaudio input via libpulse [no]
226   --enable-libquvi         enable quvi input via libquvi [no]
227   --enable-librtmp         enable RTMP[E] support via librtmp [no]
228   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
229   --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
230   --enable-libsoxr         enable Include libsoxr resampling [no]
231   --enable-libspeex        enable Speex de/encoding via libspeex [no]
232   --enable-libssh          enable SFTP protocol via libssh [no]
233   --enable-libstagefright-h264  enable H.264 decoding via libstagefright [no]
234   --enable-libtheora       enable Theora encoding via libtheora [no]
235   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
236   --enable-libutvideo      enable Ut Video encoding and decoding via libutvideo [no]
237   --enable-libv4l2         enable libv4l2/v4l-utils [no]
238   --enable-libvidstab      enable video stabilization using vid.stab [no]
239   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
240   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
241   --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
242                            native implementation exists [no]
243   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
244   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
245   --enable-libwebp         enable WebP encoding via libwebp [no]
246   --enable-libx264         enable H.264 encoding via x264 [no]
247   --enable-libxavs         enable AVS encoding via xavs [no]
248   --enable-libxvid         enable Xvid encoding via xvidcore,
249                            native MPEG-4/Xvid encoder exists [no]
250   --enable-libzmq          enable message passing via libzmq [no]
251   --enable-libzvbi         enable teletext support via libzvbi [no]
252   --enable-openal          enable OpenAL 1.1 capture support [no]
253   --enable-opencl          enable OpenCL code
254   --enable-openssl         enable openssl [no]
255   --enable-x11grab         enable X11 grabbing [no]
256   --disable-zlib           disable zlib [autodetect]
257
258 Advanced options (experts only):
259   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
260   --enable-cross-compile   assume a cross-compiler is used
261   --sysroot=PATH           root of cross-build tree
262   --sysinclude=PATH        location of cross-build system headers
263   --target-os=OS           compiler targets OS [$target_os]
264   --target-exec=CMD        command to run executables on target
265   --target-path=DIR        path to view of build directory on target
266   --target-samples=DIR     path to samples directory on target
267   --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
268   --toolchain=NAME         set tool defaults according to NAME
269   --nm=NM                  use nm tool NM [$nm_default]
270   --ar=AR                  use archive tool AR [$ar_default]
271   --as=AS                  use assembler AS [$as_default]
272   --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
273   --yasmexe=EXE            use yasm-compatible assembler EXE [$yasmexe_default]
274   --cc=CC                  use C compiler CC [$cc_default]
275   --cxx=CXX                use C compiler CXX [$cxx_default]
276   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
277   --ld=LD                  use linker LD [$ld_default]
278   --host-cc=HOSTCC         use host C compiler HOSTCC
279   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
280   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
281   --host-ld=HOSTLD         use host linker HOSTLD
282   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
283   --host-libs=HLIBS        use libs HLIBS when linking for host
284   --host-os=OS             compiler host OS [$target_os]
285   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
286   --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
287   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
288   --extra-libs=ELIBS       add ELIBS [$ELIBS]
289   --extra-version=STRING   version string suffix []
290   --optflags=OPTFLAGS      override optimization-related compiler flags
291   --build-suffix=SUFFIX    library name suffix []
292   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
293   --progs-suffix=SUFFIX    program name suffix []
294   --arch=ARCH              select architecture [$arch]
295   --cpu=CPU                select the minimum required CPU (affects
296                            instruction selection, may crash on older CPUs)
297   --enable-pic             build position-independent code
298   --enable-sram            allow use of on-chip SRAM
299   --enable-thumb           compile for Thumb instruction set
300   --disable-symver         disable symbol versioning
301   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
302   --disable-safe-bitstream-reader
303                            disable buffer boundary checking in bitreaders
304                            (faster, but may crash)
305   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
306   --enable-lto             use link-time optimization
307
308 Optimization options (experts only):
309   --disable-asm            disable all assembler optimizations
310   --disable-altivec        disable AltiVec optimizations
311   --disable-amd3dnow       disable 3DNow! optimizations
312   --disable-amd3dnowext    disable 3DNow! extended optimizations
313   --disable-mmx            disable MMX optimizations
314   --disable-mmxext         disable MMXEXT optimizations
315   --disable-sse            disable SSE optimizations
316   --disable-sse2           disable SSE2 optimizations
317   --disable-sse3           disable SSE3 optimizations
318   --disable-ssse3          disable SSSE3 optimizations
319   --disable-sse4           disable SSE4 optimizations
320   --disable-sse42          disable SSE4.2 optimizations
321   --disable-avx            disable AVX optimizations
322   --disable-fma4           disable FMA4 optimizations
323   --disable-avx2           disable AVX2 optimizations
324   --disable-armv5te        disable armv5te optimizations
325   --disable-armv6          disable armv6 optimizations
326   --disable-armv6t2        disable armv6t2 optimizations
327   --disable-vfp            disable VFP optimizations
328   --disable-neon           disable NEON optimizations
329   --disable-vis            disable VIS optimizations
330   --disable-inline-asm     disable use of inline assembler
331   --disable-yasm           disable use of yasm assembler
332   --disable-mips32r2       disable MIPS32R2 optimizations
333   --disable-mipsdspr1      disable MIPS DSP ASE R1 optimizations
334   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
335   --disable-mipsfpu        disable floating point MIPS optimizations
336   --disable-fast-unaligned consider unaligned accesses slow
337
338 Developer options (useful when working on FFmpeg itself):
339   --disable-debug          disable debugging symbols
340   --enable-debug=LEVEL     set the debug level [$debuglevel]
341   --disable-optimizations  disable compiler optimizations
342   --enable-extra-warnings  enable more compiler warnings
343   --disable-stripping      disable stripping of executables and shared libraries
344   --assert-level=level     0(default), 1 or 2, amount of assertion testing,
345                            2 causes a slowdown at runtime.
346   --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
347   --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
348                            leaks and errors, using the specified valgrind binary.
349                            Cannot be combined with --target-exec
350   --enable-ftrapv          Trap arithmetic overflows
351   --samples=PATH           location of test samples for FATE, if not set use
352                            \$FATE_SAMPLES at make invocation time.
353   --enable-neon-clobber-test check NEON registers for clobbering (should be
354                            used only for debugging purposes)
355   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
356                            should be used only for debugging purposes)
357   --enable-random          randomly enable/disable components
358   --disable-random
359   --enable-random=LIST     randomly enable/disable specific components or
360   --disable-random=LIST    component groups. LIST is a comma-separated list
361                            of NAME[:PROB] entries where NAME is a component
362                            (group) and PROB the probability associated with
363                            NAME (default 0.5).
364   --random-seed=VALUE      seed value for --enable/disable-random
365
366 NOTE: Object files are built at the place where configure is launched.
367 EOF
368   exit 0
369 }
370
371 quotes='""'
372
373 log(){
374     echo "$@" >> $logfile
375 }
376
377 log_file(){
378     log BEGIN $1
379     pr -n -t $1 >> $logfile
380     log END $1
381 }
382
383 echolog(){
384     log "$@"
385     echo "$@"
386 }
387
388 warn(){
389     log "WARNING: $*"
390     WARNINGS="${WARNINGS}WARNING: $*\n"
391 }
392
393 die(){
394     echolog "$@"
395     cat <<EOF
396
397 If you think configure made a mistake, make sure you are using the latest
398 version from Git.  If the latest version fails, report the problem to the
399 ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
400 EOF
401     if disabled logging; then
402         cat <<EOF
403 Rerun configure with logging enabled (do not use --disable-logging), and
404 include the log this produces with your report.
405 EOF
406     else
407         cat <<EOF
408 Include the log file "$logfile" produced by configure as this will help
409 solving the problem.
410 EOF
411     fi
412     exit 1
413 }
414
415 # Avoid locale weirdness, besides we really just want to translate ASCII.
416 toupper(){
417     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
418 }
419
420 tolower(){
421     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
422 }
423
424 c_escape(){
425     echo "$*" | sed 's/["\\]/\\\0/g'
426 }
427
428 sh_quote(){
429     v=$(echo "$1" | sed "s/'/'\\\\''/g")
430     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
431     echo "$v"
432 }
433
434 cleanws(){
435     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//;s/\r//g'
436 }
437
438 filter(){
439     pat=$1
440     shift
441     for v; do
442         eval "case $v in $pat) echo $v ;; esac"
443     done
444 }
445
446 filter_out(){
447     pat=$1
448     shift
449     for v; do
450         eval "case $v in $pat) ;; *) echo $v ;; esac"
451     done
452 }
453
454 map(){
455     m=$1
456     shift
457     for v; do eval $m; done
458 }
459
460 add_suffix(){
461     suffix=$1
462     shift
463     for v; do echo ${v}${suffix}; done
464 }
465
466 set_all(){
467     value=$1
468     shift
469     for var in $*; do
470         eval $var=$value
471     done
472 }
473
474 set_weak(){
475     value=$1
476     shift
477     for var; do
478         eval : \${$var:=$value}
479     done
480 }
481
482 sanitize_var_name(){
483     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
484 }
485
486 set_safe(){
487     var=$1
488     shift
489     eval $(sanitize_var_name "$var")='$*'
490 }
491
492 get_safe(){
493     eval echo \$$(sanitize_var_name "$1")
494 }
495
496 pushvar(){
497     for pvar in $*; do
498         eval level=\${${pvar}_level:=0}
499         eval ${pvar}_${level}="\$$pvar"
500         eval ${pvar}_level=$(($level+1))
501     done
502 }
503
504 popvar(){
505     for pvar in $*; do
506         eval level=\${${pvar}_level:-0}
507         test $level = 0 && continue
508         eval level=$(($level-1))
509         eval $pvar="\${${pvar}_${level}}"
510         eval ${pvar}_level=$level
511         eval unset ${pvar}_${level}
512     done
513 }
514
515 enable(){
516     set_all yes $*
517 }
518
519 disable(){
520     set_all no $*
521 }
522
523 enable_weak(){
524     set_weak yes $*
525 }
526
527 disable_weak(){
528     set_weak no $*
529 }
530
531 enable_safe(){
532     for var; do
533         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
534     done
535 }
536
537 disable_safe(){
538     for var; do
539         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
540     done
541 }
542
543 do_enable_deep(){
544     for var; do
545         enabled $var && continue
546         eval sel="\$${var}_select"
547         eval sgs="\$${var}_suggest"
548         pushvar var sgs
549         enable_deep $sel
550         popvar sgs
551         enable_deep_weak $sgs
552         popvar var
553     done
554 }
555
556 enable_deep(){
557     do_enable_deep $*
558     enable $*
559 }
560
561 enable_deep_weak(){
562     for var; do
563         disabled $var && continue
564         pushvar var
565         do_enable_deep $var
566         popvar var
567         enable_weak $var
568     done
569 }
570
571 enabled(){
572     test "${1#!}" = "$1" && op== || op=!=
573     eval test "x\$${1#!}" $op "xyes"
574 }
575
576 disabled(){
577     test "${1#!}" = "$1" && op== || op=!=
578     eval test "x\$${1#!}" $op "xno"
579 }
580
581 enabled_all(){
582     for opt; do
583         enabled $opt || return 1
584     done
585 }
586
587 disabled_all(){
588     for opt; do
589         disabled $opt || return 1
590     done
591 }
592
593 enabled_any(){
594     for opt; do
595         enabled $opt && return 0
596     done
597 }
598
599 disabled_any(){
600     for opt; do
601         disabled $opt && return 0
602     done
603     return 1
604 }
605
606 set_default(){
607     for opt; do
608         eval : \${$opt:=\$${opt}_default}
609     done
610 }
611
612 is_in(){
613     value=$1
614     shift
615     for var in $*; do
616         [ $var = $value ] && return 0
617     done
618     return 1
619 }
620
621 do_check_deps(){
622     for cfg; do
623         cfg="${cfg#!}"
624         enabled ${cfg}_checking && die "Circular dependency for $cfg."
625         disabled ${cfg}_checking && continue
626         enable ${cfg}_checking
627         append allopts $cfg
628
629         eval dep_all="\$${cfg}_deps"
630         eval dep_any="\$${cfg}_deps_any"
631         eval dep_sel="\$${cfg}_select"
632         eval dep_sgs="\$${cfg}_suggest"
633         eval dep_ifa="\$${cfg}_if"
634         eval dep_ifn="\$${cfg}_if_any"
635
636         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
637         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
638         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
639
640         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
641         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
642         enabled_all  $dep_all || disable $cfg
643         enabled_any  $dep_any || disable $cfg
644         disabled_any $dep_sel && disable $cfg
645
646         if enabled $cfg; then
647             enable_deep $dep_sel
648             enable_deep_weak $dep_sgs
649         fi
650
651         disable ${cfg}_checking
652     done
653 }
654
655 check_deps(){
656     unset allopts
657
658     do_check_deps "$@"
659
660     for cfg in $allopts; do
661         enabled $cfg || continue
662         eval dep_extralibs="\$${cfg}_extralibs"
663         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
664     done
665 }
666
667 print_config(){
668     pfx=$1
669     files=$2
670     shift 2
671     map 'eval echo "$v \${$v:-no}"' "$@" |
672     awk "BEGIN { split(\"$files\", files) }
673         {
674             c = \"$pfx\" toupper(\$1);
675             v = \$2;
676             sub(/yes/, 1, v);
677             sub(/no/,  0, v);
678             for (f in files) {
679                 file = files[f];
680                 if (file ~ /\\.h\$/) {
681                     printf(\"#define %s %d\\n\", c, v) >>file;
682                 } else if (file ~ /\\.asm\$/) {
683                     printf(\"%%define %s %d\\n\", c, v) >>file;
684                 } else if (file ~ /\\.mak\$/) {
685                     n = -v ? \"\" : \"!\";
686                     printf(\"%s%s=yes\\n\", n, c) >>file;
687                 } else if (file ~ /\\.texi\$/) {
688                     pre = -v ? \"\" : \"@c \";
689                     yesno = \$2;
690                     c2 = tolower(c);
691                     gsub(/_/, \"-\", c2);
692                     printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
693                 }
694             }
695         }"
696 }
697
698 print_enabled(){
699     suf=$1
700     shift
701     for v; do
702         enabled $v && printf "%s\n" ${v%$suf};
703     done
704 }
705
706 append(){
707     var=$1
708     shift
709     eval "$var=\"\$$var $*\""
710 }
711
712 prepend(){
713     var=$1
714     shift
715     eval "$var=\"$* \$$var\""
716 }
717
718 add_cppflags(){
719     append CPPFLAGS "$@"
720 }
721
722 add_cflags(){
723     append CFLAGS $($cflags_filter "$@")
724 }
725
726 add_cxxflags(){
727     append CXXFLAGS $($cflags_filter "$@")
728 }
729
730 add_asflags(){
731     append ASFLAGS $($asflags_filter "$@")
732 }
733
734 add_ldflags(){
735     append LDFLAGS $($ldflags_filter "$@")
736 }
737
738 add_stripflags(){
739     append ASMSTRIPFLAGS "$@"
740 }
741
742 add_extralibs(){
743     prepend extralibs $($ldflags_filter "$@")
744 }
745
746 add_host_cppflags(){
747     append host_cppflags "$@"
748 }
749
750 add_host_cflags(){
751     append host_cflags $($host_cflags_filter "$@")
752 }
753
754 add_host_ldflags(){
755     append host_ldflags $($host_ldflags_filter "$@")
756 }
757
758 add_compat(){
759     append compat_objs $1
760     shift
761     map 'add_cppflags -D$v' "$@"
762 }
763
764 check_cmd(){
765     log "$@"
766     "$@" >> $logfile 2>&1
767 }
768
769 cc_o(){
770     eval printf '%s\\n' $CC_O
771 }
772
773 cc_e(){
774     eval printf '%s\\n' $CC_E
775 }
776
777 check_cc(){
778     log check_cc "$@"
779     cat > $TMPC
780     log_file $TMPC
781     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
782 }
783
784 check_cxx(){
785     log check_cxx "$@"
786     cat > $TMPCPP
787     log_file $TMPCPP
788     check_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
789 }
790
791 check_cpp(){
792     log check_cpp "$@"
793     cat > $TMPC
794     log_file $TMPC
795     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
796 }
797
798 as_o(){
799     eval printf '%s\\n' $AS_O
800 }
801
802 check_as(){
803     log check_as "$@"
804     cat > $TMPS
805     log_file $TMPS
806     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
807 }
808
809 check_inline_asm(){
810     log check_inline_asm "$@"
811     name="$1"
812     code="$2"
813     shift 2
814     disable $name
815     check_cc "$@" <<EOF && enable $name
816 void foo(void){ __asm__ volatile($code); }
817 EOF
818 }
819
820 check_insn(){
821     log check_insn "$@"
822     check_inline_asm ${1}_inline "\"$2\""
823     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
824 }
825
826 check_yasm(){
827     log check_yasm "$@"
828     echo "$1" > $TMPS
829     log_file $TMPS
830     shift 1
831     check_cmd $yasmexe $YASMFLAGS -Werror "$@" -o $TMPO $TMPS
832 }
833
834 ld_o(){
835     eval printf '%s\\n' $LD_O
836 }
837
838 check_ld(){
839     log check_ld "$@"
840     type=$1
841     shift 1
842     flags=$(filter_out '-l*|*.so' $@)
843     libs=$(filter '-l*|*.so' $@)
844     check_$type $($cflags_filter $flags) || return
845     flags=$($ldflags_filter $flags)
846     libs=$($ldflags_filter $libs)
847     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
848 }
849
850 print_include(){
851     hdr=$1
852     test "${hdr%.h}" = "${hdr}" &&
853         echo "#include $hdr"    ||
854         echo "#include <$hdr>"
855 }
856
857 check_code(){
858     log check_code "$@"
859     check=$1
860     headers=$2
861     code=$3
862     shift 3
863     {
864         for hdr in $headers; do
865             print_include $hdr
866         done
867         echo "int main(void) { $code; return 0; }"
868     } | check_$check "$@"
869 }
870
871 check_cppflags(){
872     log check_cppflags "$@"
873     check_cc "$@" <<EOF && append CPPFLAGS "$@"
874 int x;
875 EOF
876 }
877
878 test_cflags(){
879     log test_cflags "$@"
880     set -- $($cflags_filter "$@")
881     check_cc "$@" <<EOF
882 int x;
883 EOF
884 }
885
886 check_cflags(){
887     log check_cflags "$@"
888     test_cflags "$@" && add_cflags "$@"
889 }
890
891 check_cxxflags(){
892     log check_cxxflags "$@"
893     set -- $($cflags_filter "$@")
894     check_cxx "$@" <<EOF && append CXXFLAGS "$@"
895 int x;
896 EOF
897 }
898
899 test_ldflags(){
900     log test_ldflags "$@"
901     check_ld "cc" "$@" <<EOF
902 int main(void){ return 0; }
903 EOF
904 }
905
906 check_ldflags(){
907     log check_ldflags "$@"
908     test_ldflags "$@" && add_ldflags "$@"
909 }
910
911 test_stripflags(){
912     log test_stripflags "$@"
913     # call check_cc to get a fresh TMPO
914     check_cc <<EOF
915 int main(void) { return 0; }
916 EOF
917     check_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
918 }
919
920 check_stripflags(){
921     log check_stripflags "$@"
922     test_stripflags "$@" && add_stripflags "$@"
923 }
924
925 check_header(){
926     log check_header "$@"
927     header=$1
928     shift
929     disable_safe $header
930     check_cpp "$@" <<EOF && enable_safe $header
931 #include <$header>
932 int x;
933 EOF
934 }
935
936 check_func(){
937     log check_func "$@"
938     func=$1
939     shift
940     disable $func
941     check_ld "cc" "$@" <<EOF && enable $func
942 extern int $func();
943 int main(void){ $func(); }
944 EOF
945 }
946
947 check_mathfunc(){
948     log check_mathfunc "$@"
949     func=$1
950     narg=$2
951     shift 2
952     test $narg = 2 && args="f, g" || args="f"
953     disable $func
954     check_ld "cc" "$@" <<EOF && enable $func
955 #include <math.h>
956 float foo(float f, float g) { return $func($args); }
957 int main(void){ return (int) foo; }
958 EOF
959 }
960
961 check_func_headers(){
962     log check_func_headers "$@"
963     headers=$1
964     funcs=$2
965     shift 2
966     {
967         for hdr in $headers; do
968             print_include $hdr
969         done
970         for func in $funcs; do
971             echo "long check_$func(void) { return (long) $func; }"
972         done
973         echo "int main(void) { return 0; }"
974     } | check_ld "cc" "$@" && enable $funcs && enable_safe $headers
975 }
976
977 check_class_headers_cpp(){
978     log check_class_headers_cpp "$@"
979     headers=$1
980     classes=$2
981     shift 2
982     {
983         for hdr in $headers; do
984             echo "#include <$hdr>"
985         done
986         echo "int main(void) { "
987         i=1
988         for class in $classes; do
989             echo "$class obj$i;"
990             i=$(expr $i + 1)
991         done
992         echo "return 0; }"
993     } | check_ld "cxx" "$@" && enable $funcs && enable_safe $headers
994 }
995
996 check_cpp_condition(){
997     log check_cpp_condition "$@"
998     header=$1
999     condition=$2
1000     shift 2
1001     check_cpp "$@" <<EOF
1002 #include <$header>
1003 #if !($condition)
1004 #error "unsatisfied condition: $condition"
1005 #endif
1006 EOF
1007 }
1008
1009 check_lib(){
1010     log check_lib "$@"
1011     header="$1"
1012     func="$2"
1013     shift 2
1014     check_header $header && check_func $func "$@" && add_extralibs "$@"
1015 }
1016
1017 check_lib2(){
1018     log check_lib2 "$@"
1019     headers="$1"
1020     funcs="$2"
1021     shift 2
1022     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1023 }
1024
1025 check_lib_cpp(){
1026     log check_lib_cpp "$@"
1027     headers="$1"
1028     classes="$2"
1029     shift 2
1030     check_class_headers_cpp "$headers" "$classes" "$@" && add_extralibs "$@"
1031 }
1032
1033 check_pkg_config(){
1034     log check_pkg_config "$@"
1035     pkgandversion="$1"
1036     pkg="${1%% *}"
1037     headers="$2"
1038     funcs="$3"
1039     shift 3
1040     check_cmd $pkg_config --exists --print-errors $pkgandversion || return
1041     pkg_cflags=$($pkg_config --cflags $pkg)
1042     pkg_libs=$($pkg_config --libs $pkg)
1043     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1044         set_safe ${pkg}_cflags $pkg_cflags   &&
1045         set_safe ${pkg}_libs   $pkg_libs
1046 }
1047
1048 check_exec(){
1049     check_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1050 }
1051
1052 check_exec_crash(){
1053     code=$(cat)
1054
1055     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1056     # are safe but may not be available everywhere.  Thus we use
1057     # raise(SIGTERM) instead.  The check is run in a subshell so we
1058     # can redirect the "Terminated" message from the shell.  SIGBUS
1059     # is not defined by standard C so it is used conditionally.
1060
1061     (check_exec "$@") >> $logfile 2>&1 <<EOF
1062 #include <signal.h>
1063 static void sighandler(int sig){
1064     raise(SIGTERM);
1065 }
1066 int foo(void){
1067     $code
1068 }
1069 int (*func_ptr)(void) = foo;
1070 int main(void){
1071     signal(SIGILL, sighandler);
1072     signal(SIGFPE, sighandler);
1073     signal(SIGSEGV, sighandler);
1074 #ifdef SIGBUS
1075     signal(SIGBUS, sighandler);
1076 #endif
1077     return func_ptr();
1078 }
1079 EOF
1080 }
1081
1082 check_type(){
1083     log check_type "$@"
1084     headers=$1
1085     type=$2
1086     shift 2
1087     disable_safe "$type"
1088     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1089 }
1090
1091 check_struct(){
1092     log check_struct "$@"
1093     headers=$1
1094     struct=$2
1095     member=$3
1096     shift 3
1097     disable_safe "${struct}_${member}"
1098     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1099         enable_safe "${struct}_${member}"
1100 }
1101
1102 check_builtin(){
1103     log check_builtin "$@"
1104     name=$1
1105     headers=$2
1106     builtin=$3
1107     shift 3
1108     disable "$name"
1109     check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
1110 }
1111
1112 require(){
1113     name="$1"
1114     header="$2"
1115     func="$3"
1116     shift 3
1117     check_lib $header $func "$@" || die "ERROR: $name not found"
1118 }
1119
1120 require2(){
1121     name="$1"
1122     headers="$2"
1123     func="$3"
1124     shift 3
1125     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1126 }
1127
1128 require_cpp(){
1129     name="$1"
1130     headers="$2"
1131     classes="$3"
1132     shift 3
1133     check_lib_cpp "$headers" "$classes" "$@" || die "ERROR: $name not found"
1134 }
1135
1136 require_pkg_config(){
1137     pkg="$1"
1138     check_pkg_config "$@" || die "ERROR: $pkg not found"
1139     add_cflags    $(get_safe ${pkg}_cflags)
1140     add_extralibs $(get_safe ${pkg}_libs)
1141 }
1142
1143 require_libfreetype(){
1144     log require_libfreetype "$@"
1145     pkg="freetype2"
1146     check_cmd $pkg_config --exists --print-errors $pkg \
1147       || die "ERROR: $pkg not found"
1148     pkg_cflags=$($pkg_config --cflags $pkg)
1149     pkg_libs=$($pkg_config --libs $pkg)
1150     {
1151         echo "#include <ft2build.h>"
1152         echo "#include FT_FREETYPE_H"
1153         echo "long check_func(void) { return (long) FT_Init_FreeType; }"
1154         echo "int main(void) { return 0; }"
1155     } | check_ld "cc" $pkg_cflags $pkg_libs \
1156       && set_safe ${pkg}_cflags $pkg_cflags \
1157       && set_safe ${pkg}_libs   $pkg_libs \
1158       || die "ERROR: $pkg not found"
1159     add_cflags    $(get_safe ${pkg}_cflags)
1160     add_extralibs $(get_safe ${pkg}_libs)
1161 }
1162
1163 hostcc_e(){
1164     eval printf '%s\\n' $HOSTCC_E
1165 }
1166
1167 hostcc_o(){
1168     eval printf '%s\\n' $HOSTCC_O
1169 }
1170
1171 check_host_cc(){
1172     log check_host_cc "$@"
1173     cat > $TMPC
1174     log_file $TMPC
1175     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1176 }
1177
1178 check_host_cpp(){
1179     log check_host_cpp "$@"
1180     cat > $TMPC
1181     log_file $TMPC
1182     check_cmd $host_cc $HOSTCPPFLAGS $HOSTCFLAGS "$@" $(hostcc_e $TMPO) $TMPC
1183 }
1184
1185 check_host_cppflags(){
1186     log check_host_cppflags "$@"
1187     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1188 int x;
1189 EOF
1190 }
1191
1192 check_host_cflags(){
1193     log check_host_cflags "$@"
1194     set -- $($host_cflags_filter "$@")
1195     check_host_cc "$@" <<EOF && append host_cflags "$@"
1196 int x;
1197 EOF
1198 }
1199
1200 check_host_cpp_condition(){
1201     log check_host_cpp_condition "$@"
1202     header=$1
1203     condition=$2
1204     shift 2
1205     check_host_cpp "$@" <<EOF
1206 #include <$header>
1207 #if !($condition)
1208 #error "unsatisfied condition: $condition"
1209 #endif
1210 EOF
1211 }
1212
1213 apply(){
1214     file=$1
1215     shift
1216     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1217 }
1218
1219 cp_if_changed(){
1220     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1221     mkdir -p "$(dirname $2)"
1222     $cp_f "$1" "$2"
1223 }
1224
1225 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1226 # system-dependent things.
1227
1228 COMPONENT_LIST="
1229     bsfs
1230     decoders
1231     demuxers
1232     encoders
1233     filters
1234     hwaccels
1235     indevs
1236     muxers
1237     outdevs
1238     parsers
1239     protocols
1240 "
1241
1242 EXAMPLE_LIST="
1243     decoding_encoding_example
1244     demuxing_decoding_example
1245     filtering_audio_example
1246     filtering_video_example
1247     metadata_example
1248     muxing_example
1249     remuxing_example
1250     resampling_audio_example
1251     scaling_video_example
1252     transcode_aac_example
1253 "
1254
1255 EXTERNAL_LIBRARY_LIST="
1256     avisynth
1257     bzlib
1258     crystalhd
1259     fontconfig
1260     frei0r
1261     gnutls
1262     iconv
1263     ladspa
1264     libaacplus
1265     libass
1266     libbluray
1267     libcaca
1268     libcdio
1269     libcelt
1270     libdc1394
1271     libfaac
1272     libfdk_aac
1273     libflite
1274     libfreetype
1275     libgme
1276     libgsm
1277     libiec61883
1278     libilbc
1279     libmodplug
1280     libmp3lame
1281     libnut
1282     libopencore_amrnb
1283     libopencore_amrwb
1284     libopencv
1285     libopenjpeg
1286     libopus
1287     libpulse
1288     libquvi
1289     librtmp
1290     libschroedinger
1291     libshine
1292     libsoxr
1293     libspeex
1294     libssh
1295     libstagefright_h264
1296     libtheora
1297     libtwolame
1298     libutvideo
1299     libv4l2
1300     libvidstab
1301     libvo_aacenc
1302     libvo_amrwbenc
1303     libvorbis
1304     libvpx
1305     libwavpack
1306     libwebp
1307     libx264
1308     libxavs
1309     libxvid
1310     libzmq
1311     libzvbi
1312     openal
1313     opencl
1314     openssl
1315     x11grab
1316     zlib
1317 "
1318
1319 DOCUMENT_LIST="
1320     doc
1321     htmlpages
1322     manpages
1323     podpages
1324     txtpages
1325 "
1326
1327 HWACCEL_LIST="
1328     dxva2
1329     vaapi
1330     vda
1331     vdpau
1332     xvmc
1333 "
1334
1335 LIBRARY_LIST="
1336     avcodec
1337     avdevice
1338     avfilter
1339     avformat
1340     avresample
1341     avutil
1342     postproc
1343     swresample
1344     swscale
1345 "
1346
1347 PROGRAM_LIST="
1348     ffplay
1349     ffprobe
1350     ffserver
1351     ffmpeg
1352 "
1353
1354 CONFIG_LIST="
1355     $COMPONENT_LIST
1356     $DOCUMENT_LIST
1357     $EXAMPLE_LIST
1358     $EXTERNAL_LIBRARY_LIST
1359     $HWACCEL_LIST
1360     $LIBRARY_LIST
1361     $PROGRAM_LIST
1362     dct
1363     dwt
1364     error_resilience
1365     fast_unaligned
1366     fft
1367     ftrapv
1368     gpl
1369     gray
1370     hardcoded_tables
1371     incompatible_libav_abi
1372     incompatible_fork_abi
1373     lsp
1374     lzo
1375     mdct
1376     memalign_hack
1377     memory_poisoning
1378     neon_clobber_test
1379     network
1380     nonfree
1381     pic
1382     raise_major
1383     rdft
1384     runtime_cpudetect
1385     safe_bitstream_reader
1386     shared
1387     small
1388     sram
1389     static
1390     swscale_alpha
1391     thumb
1392     version3
1393     xmm_clobber_test
1394 "
1395
1396 THREADS_LIST='
1397     pthreads
1398     w32threads
1399     os2threads
1400 '
1401
1402 ATOMICS_LIST='
1403     atomics_gcc
1404     atomics_suncc
1405     atomics_win32
1406 '
1407
1408 ARCH_LIST='
1409     aarch64
1410     alpha
1411     arm
1412     avr32
1413     avr32_ap
1414     avr32_uc
1415     bfin
1416     ia64
1417     m68k
1418     mips
1419     mips64
1420     parisc
1421     ppc
1422     ppc64
1423     s390
1424     sh4
1425     sparc
1426     sparc64
1427     tilegx
1428     tilepro
1429     tomi
1430     x86
1431     x86_32
1432     x86_64
1433 '
1434
1435 ARCH_EXT_LIST_ARM='
1436     armv5te
1437     armv6
1438     armv6t2
1439     neon
1440     vfp
1441     vfpv3
1442 '
1443
1444 ARCH_EXT_LIST_X86='
1445     amd3dnow
1446     amd3dnowext
1447     avx
1448     avx2
1449     fma4
1450     i686
1451     mmx
1452     mmxext
1453     sse
1454     sse2
1455     sse3
1456     sse4
1457     sse42
1458     ssse3
1459 '
1460
1461 ARCH_EXT_LIST="
1462     $ARCH_EXT_LIST_ARM
1463     $ARCH_EXT_LIST_X86
1464     altivec
1465     ppc4xx
1466     vis
1467     mipsfpu
1468     mips32r2
1469     mipsdspr1
1470     mipsdspr2
1471 "
1472
1473 HAVE_LIST_CMDLINE='
1474     inline_asm
1475     symver
1476     yasm
1477 '
1478
1479 HAVE_LIST_PUB='
1480     bigendian
1481     fast_unaligned
1482     incompatible_libav_abi
1483     incompatible_fork_abi
1484 '
1485
1486 MATH_FUNCS="
1487     atanf
1488     atan2f
1489     cbrt
1490     cbrtf
1491     cosf
1492     exp2
1493     exp2f
1494     expf
1495     isinf
1496     isnan
1497     ldexpf
1498     llrint
1499     llrintf
1500     log2
1501     log2f
1502     log10f
1503     lrint
1504     lrintf
1505     powf
1506     rint
1507     round
1508     roundf
1509     sinf
1510     trunc
1511     truncf
1512 "
1513
1514 HAVE_LIST="
1515     $ARCH_EXT_LIST
1516     $(add_suffix _external $ARCH_EXT_LIST)
1517     $(add_suffix _inline   $ARCH_EXT_LIST)
1518     $HAVE_LIST_CMDLINE
1519     $HAVE_LIST_PUB
1520     $THREADS_LIST
1521     $ATOMICS_LIST
1522     $MATH_FUNCS
1523     access
1524     aligned_malloc
1525     aligned_stack
1526     alsa_asoundlib_h
1527     altivec_h
1528     arpa_inet_h
1529     asm_mod_q
1530     asm_mod_y
1531     asm_types_h
1532     atomic_cas_ptr
1533     atomics_native
1534     attribute_may_alias
1535     attribute_packed
1536     cdio_paranoia_h
1537     cdio_paranoia_paranoia_h
1538     CL_cl_h
1539     clock_gettime
1540     closesocket
1541     CommandLineToArgvW
1542     cpunop
1543     CryptGenRandom
1544     dcbzl
1545     dev_bktr_ioctl_bt848_h
1546     dev_bktr_ioctl_meteor_h
1547     dev_ic_bt8xx_h
1548     dev_video_bktr_ioctl_bt848_h
1549     dev_video_meteor_ioctl_meteor_h
1550     direct_h
1551     dlfcn_h
1552     dlopen
1553     dos_paths
1554     dxva_h
1555     ebp_available
1556     ebx_available
1557     fast_64bit
1558     fast_clz
1559     fast_cmov
1560     fcntl
1561     fork
1562     getaddrinfo
1563     gethrtime
1564     getopt
1565     GetProcessAffinityMask
1566     GetProcessMemoryInfo
1567     GetProcessTimes
1568     GetSystemTimeAsFileTime
1569     getrusage
1570     getservbyport
1571     gettimeofday
1572     glob
1573     gnu_as
1574     gnu_windres
1575     gsm_h
1576     ibm_asm
1577     inet_aton
1578     io_h
1579     inline_asm_labels
1580     isatty
1581     jack_port_get_latency_range
1582     kbhit
1583     ldbrx
1584     libc_msvcrt
1585     libdc1394_1
1586     libdc1394_2
1587     local_aligned_16
1588     local_aligned_8
1589     localtime_r
1590     loongson
1591     lzo1x_999_compress
1592     machine_ioctl_bt848_h
1593     machine_ioctl_meteor_h
1594     machine_rw_barrier
1595     makeinfo
1596     malloc_h
1597     MapViewOfFile
1598     memalign
1599     MemoryBarrier
1600     mkstemp
1601     mm_empty
1602     mmap
1603     mprotect
1604     nanosleep
1605     openjpeg_1_5_openjpeg_h
1606     PeekNamedPipe
1607     perl
1608     pod2man
1609     poll_h
1610     posix_memalign
1611     pragma_deprecated
1612     pthread_cancel
1613     rdtsc
1614     rsync_contimeout
1615     sarestart
1616     sched_getaffinity
1617     sdl
1618     SetConsoleTextAttribute
1619     setmode
1620     setrlimit
1621     Sleep
1622     sndio_h
1623     socklen_t
1624     soundcard_h
1625     strerror_r
1626     struct_addrinfo
1627     struct_group_source_req
1628     struct_ip_mreq_source
1629     struct_ipv6_mreq
1630     struct_pollfd
1631     struct_rusage_ru_maxrss
1632     struct_sctp_event_subscribe
1633     struct_sockaddr_in6
1634     struct_sockaddr_sa_len
1635     struct_sockaddr_storage
1636     struct_stat_st_mtim_tv_nsec
1637     struct_v4l2_frmivalenum_discrete
1638     symver_asm_label
1639     symver_gnu_asm
1640     sync_val_compare_and_swap
1641     sysconf
1642     sysctl
1643     sys_mman_h
1644     sys_param_h
1645     sys_resource_h
1646     sys_select_h
1647     sys_soundcard_h
1648     sys_time_h
1649     sys_un_h
1650     sys_videoio_h
1651     termios_h
1652     texi2html
1653     threads
1654     unistd_h
1655     usleep
1656     vdpau_x11
1657     vfp_args
1658     VirtualAlloc
1659     windows_h
1660     winsock2_h
1661     xform_asm
1662     xlib
1663     xmm_clobbers
1664 "
1665
1666 # options emitted with CONFIG_ prefix but not available on the command line
1667 CONFIG_EXTRA="
1668     aandcttables
1669     ac3dsp
1670     audio_frame_queue
1671     dsputil
1672     exif
1673     frame_thread_encoder
1674     gcrypt
1675     golomb
1676     gplv3
1677     h263dsp
1678     h264chroma
1679     h264dsp
1680     h264pred
1681     h264qpel
1682     hpeldsp
1683     huffman
1684     intrax8
1685     lgplv3
1686     llviddsp
1687     lpc
1688     mpegaudio
1689     mpegaudiodsp
1690     mpegvideo
1691     mpegvideoenc
1692     nettle
1693     rangecoder
1694     riffdec
1695     riffenc
1696     rtpdec
1697     rtpenc_chain
1698     sinewin
1699     videodsp
1700     vp3dsp
1701 "
1702
1703 CMDLINE_SELECT="
1704     $ARCH_EXT_LIST
1705     $CONFIG_LIST
1706     $HAVE_LIST_CMDLINE
1707     $THREADS_LIST
1708     asm
1709     cross_compile
1710     debug
1711     extra_warnings
1712     logging
1713     lto
1714     optimizations
1715     rpath
1716     stripping
1717 "
1718
1719 PATHS_LIST='
1720     bindir
1721     datadir
1722     docdir
1723     incdir
1724     libdir
1725     mandir
1726     prefix
1727     shlibdir
1728 '
1729
1730 CMDLINE_SET="
1731     $PATHS_LIST
1732     ar
1733     arch
1734     as
1735     assert_level
1736     build_suffix
1737     cc
1738     cpu
1739     cross_prefix
1740     cxx
1741     dep_cc
1742     extra_version
1743     host_cc
1744     host_cflags
1745     host_ld
1746     host_ldflags
1747     host_libs
1748     host_os
1749     install
1750     ld
1751     logfile
1752     malloc_prefix
1753     nm
1754     optflags
1755     pkg_config
1756     progs_suffix
1757     random_seed
1758     samples
1759     strip
1760     sysinclude
1761     sysroot
1762     target_exec
1763     target_os
1764     target_path
1765     target_samples
1766     tempprefix
1767     toolchain
1768     valgrind
1769     yasmexe
1770 "
1771
1772 CMDLINE_APPEND="
1773     extra_cflags
1774     extra_cxxflags
1775     host_cppflags
1776 "
1777
1778 # code dependency declarations
1779
1780 # architecture extensions
1781
1782 armv5te_deps="arm"
1783 armv6_deps="arm"
1784 armv6t2_deps="arm"
1785 neon_deps_any="aarch64 arm"
1786 vfp_deps_any="aarch64 arm"
1787 vfpv3_deps="vfp"
1788
1789 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1790
1791 mipsfpu_deps="mips"
1792 mips32r2_deps="mips"
1793 mipsdspr1_deps="mips"
1794 mipsdspr2_deps="mips"
1795
1796 altivec_deps="ppc"
1797 ppc4xx_deps="ppc"
1798
1799 vis_deps="sparc"
1800
1801 cpunop_deps="i686"
1802 x86_64_select="i686"
1803 x86_64_suggest="fast_cmov"
1804
1805 amd3dnow_deps="mmx"
1806 amd3dnowext_deps="amd3dnow"
1807 i686_deps="x86"
1808 mmx_deps="x86"
1809 mmxext_deps="mmx"
1810 sse_deps="mmxext"
1811 sse2_deps="sse"
1812 sse3_deps="sse2"
1813 ssse3_deps="sse3"
1814 sse4_deps="ssse3"
1815 sse42_deps="sse4"
1816 avx_deps="sse42"
1817 fma4_deps="avx"
1818 avx2_deps="avx"
1819
1820 mmx_external_deps="yasm"
1821 mmx_inline_deps="inline_asm"
1822 mmx_suggest="mmx_external mmx_inline"
1823
1824 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86); do
1825     eval dep=\$${ext}_deps
1826     eval ${ext}_external_deps='"${dep}_external"'
1827     eval ${ext}_inline_deps='"${dep}_inline"'
1828     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1829 done
1830
1831 aligned_stack_if_any="aarch64 ppc x86"
1832 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1833 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1834 fast_unaligned_if_any="aarch64 ppc x86"
1835
1836 need_memalign="altivec neon sse"
1837
1838 # system capabilities
1839 log2_deps="!libc_msvcrt"
1840
1841 symver_if_any="symver_asm_label symver_gnu_asm"
1842
1843 # threading support
1844 atomics_gcc_if="sync_val_compare_and_swap"
1845 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1846 atomics_win32_if="MemoryBarrier"
1847 atomics_native_if_any="$ATOMICS_LIST"
1848 threads_if_any="$THREADS_LIST"
1849
1850 # subsystems
1851 dct_select="rdft"
1852 error_resilience_select="dsputil"
1853 frame_thread_encoder_deps="encoders threads"
1854 lpc_select="dsputil"
1855 mdct_select="fft"
1856 rdft_select="fft"
1857 mpegaudio_select="mpegaudiodsp"
1858 mpegaudiodsp_select="dct"
1859 mpegvideo_select="dsputil h264chroma hpeldsp videodsp"
1860 mpegvideoenc_select="mpegvideo"
1861
1862 # decoders / encoders
1863 aac_decoder_select="mdct sinewin"
1864 aac_encoder_select="audio_frame_queue mdct sinewin"
1865 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1866 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1867 ac3_encoder_select="mdct ac3dsp dsputil"
1868 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1869 aic_decoder_select="dsputil golomb"
1870 alac_encoder_select="lpc"
1871 als_decoder_select="dsputil"
1872 amrnb_decoder_select="lsp"
1873 amrwb_decoder_select="lsp"
1874 amv_decoder_select="dsputil hpeldsp exif"
1875 amv_encoder_select="aandcttables"
1876 ape_decoder_select="dsputil"
1877 asv1_decoder_select="dsputil"
1878 asv1_encoder_select="dsputil"
1879 asv2_decoder_select="dsputil"
1880 asv2_encoder_select="dsputil"
1881 atrac1_decoder_select="mdct sinewin"
1882 atrac3_decoder_select="mdct"
1883 atrac3p_decoder_select="mdct sinewin"
1884 avrn_decoder_select="exif"
1885 bink_decoder_select="dsputil hpeldsp"
1886 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
1887 binkaudio_rdft_decoder_select="mdct rdft sinewin"
1888 cavs_decoder_select="dsputil golomb h264chroma videodsp"
1889 cllc_decoder_select="dsputil"
1890 comfortnoise_encoder_select="lpc"
1891 cook_decoder_select="dsputil mdct sinewin"
1892 cscd_decoder_select="lzo"
1893 cscd_decoder_suggest="zlib"
1894 dca_decoder_select="mdct"
1895 dirac_decoder_select="dsputil dwt golomb videodsp"
1896 dnxhd_decoder_select="dsputil"
1897 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
1898 dvvideo_decoder_select="dsputil"
1899 dvvideo_encoder_select="dsputil"
1900 dxa_decoder_select="zlib"
1901 eac3_decoder_select="ac3_decoder"
1902 eac3_encoder_select="ac3_encoder"
1903 eamad_decoder_select="aandcttables dsputil mpegvideo"
1904 eatgq_decoder_select="aandcttables"
1905 eatqi_decoder_select="aandcttables error_resilience mpegvideo"
1906 exr_decoder_select="zlib"
1907 ffv1_decoder_select="dsputil golomb rangecoder"
1908 ffv1_encoder_select="dsputil rangecoder"
1909 ffvhuff_decoder_select="dsputil llviddsp"
1910 ffvhuff_encoder_select="dsputil huffman llviddsp"
1911 flac_decoder_select="golomb"
1912 flac_encoder_select="dsputil golomb lpc"
1913 flashsv_decoder_select="zlib"
1914 flashsv_encoder_select="zlib"
1915 flashsv2_encoder_select="zlib"
1916 flashsv2_decoder_select="zlib"
1917 flv_decoder_select="h263_decoder"
1918 flv_encoder_select="h263_encoder"
1919 fourxm_decoder_select="dsputil"
1920 fraps_decoder_select="dsputil huffman"
1921 g2m_decoder_select="dsputil zlib"
1922 g729_decoder_select="dsputil"
1923 h261_decoder_select="error_resilience mpegvideo"
1924 h261_encoder_select="aandcttables mpegvideoenc"
1925 h263_decoder_select="error_resilience h263_parser h263dsp mpegvideo"
1926 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1927 h263i_decoder_select="h263_decoder"
1928 h263p_encoder_select="h263_encoder"
1929 h264_decoder_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1930 h264_decoder_suggest="error_resilience"
1931 hevc_decoder_select="dsputil golomb videodsp"
1932 huffyuv_decoder_select="dsputil llviddsp"
1933 huffyuv_encoder_select="dsputil huffman llviddsp"
1934 iac_decoder_select="dsputil fft mdct sinewin"
1935 imc_decoder_select="dsputil fft mdct sinewin"
1936 indeo3_decoder_select="hpeldsp"
1937 interplay_video_decoder_select="hpeldsp"
1938 jpegls_decoder_select="dsputil golomb hpeldsp exif"
1939 jpegls_encoder_select="golomb"
1940 jv_decoder_select="dsputil"
1941 lagarith_decoder_select="dsputil"
1942 ljpeg_encoder_select="aandcttables mpegvideoenc"
1943 loco_decoder_select="golomb"
1944 mdec_decoder_select="dsputil error_resilience mpegvideo"
1945 metasound_decoder_select="lsp mdct sinewin"
1946 mimic_decoder_select="dsputil hpeldsp"
1947 mjpeg_decoder_select="dsputil hpeldsp exif"
1948 mjpegb_decoder_select="dsputil hpeldsp exif"
1949 mjpeg_encoder_select="aandcttables dsputil mpegvideoenc"
1950 mlp_decoder_select="dsputil mlp_parser"
1951 motionpixels_decoder_select="dsputil"
1952 mp1_decoder_select="mpegaudio"
1953 mp1float_decoder_select="mpegaudio"
1954 mp2_decoder_select="mpegaudio"
1955 mp2float_decoder_select="mpegaudio"
1956 mp3_decoder_select="mpegaudio"
1957 mp3adu_decoder_select="mpegaudio"
1958 mp3adufloat_decoder_select="mpegaudio"
1959 mp3float_decoder_select="mpegaudio"
1960 mp3on4_decoder_select="mpegaudio"
1961 mp3on4float_decoder_select="mpegaudio"
1962 mpc7_decoder_select="dsputil mpegaudiodsp"
1963 mpc8_decoder_select="dsputil mpegaudiodsp"
1964 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1965 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1966 mpeg1video_decoder_select="error_resilience mpegvideo"
1967 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
1968 mpeg2video_decoder_select="error_resilience mpegvideo"
1969 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
1970 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1971 mpeg4_encoder_select="h263_encoder"
1972 msmpeg4v1_decoder_select="h263_decoder"
1973 msmpeg4v2_decoder_select="h263_decoder"
1974 msmpeg4v2_encoder_select="h263_encoder"
1975 msmpeg4v3_decoder_select="h263_decoder"
1976 msmpeg4v3_encoder_select="h263_encoder"
1977 mss2_decoder_select="error_resilience vc1_decoder"
1978 mxpeg_decoder_select="dsputil hpeldsp exif"
1979 nellymoser_decoder_select="mdct sinewin"
1980 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1981 nuv_decoder_select="dsputil lzo"
1982 png_decoder_select="zlib"
1983 png_encoder_select="dsputil zlib"
1984 prores_decoder_select="dsputil"
1985 prores_encoder_select="dsputil"
1986 qcelp_decoder_select="lsp"
1987 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1988 ra_144_encoder_select="audio_frame_queue lpc"
1989 ralf_decoder_select="golomb"
1990 rtjpeg_decoder_select="dsputil"
1991 rv10_decoder_select="error_resilience h263_decoder h263dsp"
1992 rv10_encoder_select="h263_encoder"
1993 rv20_decoder_select="error_resilience h263_decoder h263dsp"
1994 rv20_encoder_select="h263_encoder"
1995 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1996 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1997 shorten_decoder_select="golomb"
1998 sipr_decoder_select="lsp"
1999 snow_decoder_select="dsputil dwt h264qpel hpeldsp rangecoder"
2000 snow_encoder_select="aandcttables dsputil dwt h264qpel hpeldsp mpegvideoenc rangecoder"
2001 sonic_decoder_select="golomb"
2002 sonic_encoder_select="golomb"
2003 sonic_ls_encoder_select="golomb"
2004 sp5x_decoder_select="dsputil hpeldsp exif"
2005 svq1_decoder_select="hpeldsp"
2006 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
2007 svq3_decoder_select="golomb h264chroma h264dsp h264pred h264qpel hpeldsp mpegvideo videodsp"
2008 svq3_decoder_suggest="error_resilience zlib"
2009 tak_decoder_select="dsputil"
2010 theora_decoder_select="vp3_decoder"
2011 tiff_decoder_suggest="zlib"
2012 tiff_encoder_suggest="zlib"
2013 thp_decoder_select="dsputil hpeldsp exif"
2014 truehd_decoder_select="mlp_parser"
2015 truemotion2_decoder_select="dsputil"
2016 truespeech_decoder_select="dsputil"
2017 tscc_decoder_select="zlib"
2018 twinvq_decoder_select="mdct lsp sinewin"
2019 utvideo_decoder_select="dsputil"
2020 utvideo_encoder_select="dsputil huffman"
2021 vble_decoder_select="dsputil"
2022 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel intrax8"
2023 vc1image_decoder_select="vc1_decoder"
2024 vorbis_decoder_select="mdct"
2025 vorbis_encoder_select="mdct"
2026 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2027 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
2028 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
2029 vp6a_decoder_select="vp6_decoder"
2030 vp6f_decoder_select="vp6_decoder"
2031 vp8_decoder_select="h264pred videodsp"
2032 vp9_decoder_select="videodsp"
2033 webp_decoder_select="vp8_decoder"
2034 wmapro_decoder_select="mdct sinewin"
2035 wmav1_decoder_select="mdct sinewin"
2036 wmav1_encoder_select="mdct sinewin"
2037 wmav2_decoder_select="mdct sinewin"
2038 wmav2_encoder_select="mdct sinewin"
2039 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2040 wmv1_decoder_select="h263_decoder"
2041 wmv1_encoder_select="h263_encoder"
2042 wmv2_decoder_select="h263_decoder intrax8 videodsp"
2043 wmv2_encoder_select="h263_encoder"
2044 wmv3_decoder_select="vc1_decoder"
2045 wmv3image_decoder_select="wmv3_decoder"
2046 zerocodec_decoder_select="zlib"
2047 zlib_decoder_select="zlib"
2048 zlib_encoder_select="zlib"
2049 zmbv_decoder_select="zlib"
2050 zmbv_encoder_select="zlib"
2051
2052 # hardware accelerators
2053 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2054 dxva2_deps="dxva2api_h"
2055 vaapi_deps="va_va_h"
2056 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2057 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2058 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2059 xvmc_deps="X11_extensions_XvMClib_h"
2060
2061 h263_vaapi_hwaccel_deps="vaapi"
2062 h263_vaapi_hwaccel_select="h263_decoder"
2063 h263_vdpau_hwaccel_deps="vdpau"
2064 h263_vdpau_hwaccel_select="h263_decoder"
2065 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2066 h264_dxva2_hwaccel_deps="dxva2"
2067 h264_dxva2_hwaccel_select="h264_decoder"
2068 h264_vaapi_hwaccel_deps="vaapi"
2069 h264_vaapi_hwaccel_select="h264_decoder"
2070 h264_vda_decoder_deps="vda"
2071 h264_vda_decoder_select="h264_decoder"
2072 h264_vda_hwaccel_deps="vda"
2073 h264_vda_hwaccel_select="h264_decoder"
2074 h264_vdpau_decoder_deps="vdpau"
2075 h264_vdpau_decoder_select="h264_decoder"
2076 h264_vdpau_hwaccel_deps="vdpau"
2077 h264_vdpau_hwaccel_select="h264_decoder"
2078 mpeg_vdpau_decoder_deps="vdpau"
2079 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2080 mpeg_xvmc_hwaccel_deps="xvmc"
2081 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2082 mpeg1_vdpau_decoder_deps="vdpau"
2083 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2084 mpeg1_vdpau_hwaccel_deps="vdpau"
2085 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2086 mpeg1_xvmc_hwaccel_deps="xvmc"
2087 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2088 mpeg2_crystalhd_decoder_select="crystalhd"
2089 mpeg2_dxva2_hwaccel_deps="dxva2"
2090 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2091 mpeg2_vaapi_hwaccel_deps="vaapi"
2092 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2093 mpeg2_vdpau_hwaccel_deps="vdpau"
2094 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2095 mpeg2_xvmc_hwaccel_deps="xvmc"
2096 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2097 mpeg4_crystalhd_decoder_select="crystalhd"
2098 mpeg4_vaapi_hwaccel_deps="vaapi"
2099 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2100 mpeg4_vdpau_decoder_deps="vdpau"
2101 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2102 mpeg4_vdpau_hwaccel_deps="vdpau"
2103 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2104 msmpeg4_crystalhd_decoder_select="crystalhd"
2105 vc1_crystalhd_decoder_select="crystalhd"
2106 vc1_dxva2_hwaccel_deps="dxva2"
2107 vc1_dxva2_hwaccel_select="vc1_decoder"
2108 vc1_vaapi_hwaccel_deps="vaapi"
2109 vc1_vaapi_hwaccel_select="vc1_decoder"
2110 vc1_vdpau_decoder_deps="vdpau"
2111 vc1_vdpau_decoder_select="vc1_decoder"
2112 vc1_vdpau_hwaccel_deps="vdpau"
2113 vc1_vdpau_hwaccel_select="vc1_decoder"
2114 wmv3_crystalhd_decoder_select="crystalhd"
2115 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2116 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2117 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2118 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2119
2120 # parsers
2121 h264_parser_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
2122 hevc_parser_select="hevc_decoder"
2123 mpeg4video_parser_select="error_resilience mpegvideo"
2124 mpegvideo_parser_select="error_resilience mpegvideo"
2125 vc1_parser_select="mpegvideo"
2126
2127 # external libraries
2128 libaacplus_encoder_deps="libaacplus"
2129 libcelt_decoder_deps="libcelt"
2130 libfaac_encoder_deps="libfaac"
2131 libfaac_encoder_select="audio_frame_queue"
2132 libfdk_aac_decoder_deps="libfdk_aac"
2133 libfdk_aac_encoder_deps="libfdk_aac"
2134 libfdk_aac_encoder_select="audio_frame_queue"
2135 libgme_demuxer_deps="libgme"
2136 libgsm_decoder_deps="libgsm"
2137 libgsm_encoder_deps="libgsm"
2138 libgsm_ms_decoder_deps="libgsm"
2139 libgsm_ms_encoder_deps="libgsm"
2140 libilbc_decoder_deps="libilbc"
2141 libilbc_encoder_deps="libilbc"
2142 libmodplug_demuxer_deps="libmodplug"
2143 libmp3lame_encoder_deps="libmp3lame"
2144 libmp3lame_encoder_select="audio_frame_queue"
2145 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2146 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2147 libopencore_amrnb_encoder_select="audio_frame_queue"
2148 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2149 libopenjpeg_decoder_deps="libopenjpeg"
2150 libopenjpeg_encoder_deps="libopenjpeg"
2151 libopus_decoder_deps="libopus"
2152 libopus_encoder_deps="libopus"
2153 libopus_encoder_select="audio_frame_queue"
2154 libquvi_demuxer_deps="libquvi"
2155 libschroedinger_decoder_deps="libschroedinger"
2156 libschroedinger_encoder_deps="libschroedinger"
2157 libshine_encoder_deps="libshine"
2158 libshine_encoder_select="audio_frame_queue"
2159 libspeex_decoder_deps="libspeex"
2160 libspeex_encoder_deps="libspeex"
2161 libspeex_encoder_select="audio_frame_queue"
2162 libstagefright_h264_decoder_deps="libstagefright_h264"
2163 libtheora_encoder_deps="libtheora"
2164 libtwolame_encoder_deps="libtwolame"
2165 libvo_aacenc_encoder_deps="libvo_aacenc"
2166 libvo_aacenc_encoder_select="audio_frame_queue"
2167 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2168 libvorbis_decoder_deps="libvorbis"
2169 libvorbis_encoder_deps="libvorbis"
2170 libvorbis_encoder_select="audio_frame_queue"
2171 libvpx_vp8_decoder_deps="libvpx"
2172 libvpx_vp8_encoder_deps="libvpx"
2173 libvpx_vp9_decoder_deps="libvpx"
2174 libvpx_vp9_encoder_deps="libvpx"
2175 libwavpack_encoder_deps="libwavpack"
2176 libwebp_encoder_deps="libwebp"
2177 libx264_encoder_deps="libx264"
2178 libx264rgb_encoder_deps="libx264"
2179 libxavs_encoder_deps="libxavs"
2180 libxvid_encoder_deps="libxvid"
2181 libutvideo_decoder_deps="libutvideo"
2182 libutvideo_encoder_deps="libutvideo"
2183 libzvbi_teletext_decoder_deps="libzvbi"
2184
2185 # demuxers / muxers
2186 ac3_demuxer_select="ac3_parser"
2187 asf_demuxer_select="riffdec"
2188 asf_muxer_select="riffenc"
2189 asf_stream_muxer_select="asf_muxer"
2190 avi_demuxer_select="riffdec"
2191 avi_muxer_select="riffenc"
2192 avisynth_demuxer_deps="avisynth"
2193 avisynth_demuxer_select="riffdec"
2194 caf_demuxer_select="riffdec"
2195 dirac_demuxer_select="dirac_parser"
2196 dts_demuxer_select="dca_parser"
2197 dtshd_demuxer_select="dca_parser"
2198 dxa_demuxer_select="riffdec"
2199 eac3_demuxer_select="ac3_parser"
2200 f4v_muxer_select="mov_muxer"
2201 flac_demuxer_select="flac_parser"
2202 hds_muxer_select="flv_muxer"
2203 hls_muxer_select="mpegts_muxer"
2204 ipod_muxer_select="mov_muxer"
2205 ismv_muxer_select="mov_muxer"
2206 libnut_demuxer_deps="libnut"
2207 libnut_muxer_deps="libnut"
2208 matroska_audio_muxer_select="matroska_muxer"
2209 matroska_demuxer_select="riffdec"
2210 matroska_demuxer_suggest="bzlib lzo zlib"
2211 matroska_muxer_select="riffenc"
2212 mmf_muxer_select="riffenc"
2213 mov_demuxer_select="riffdec"
2214 mov_demuxer_suggest="zlib"
2215 mov_muxer_select="riffenc rtpenc_chain"
2216 mp3_demuxer_select="mpegaudio_parser"
2217 mp4_muxer_select="mov_muxer"
2218 mpegts_muxer_select="adts_muxer latm_muxer"
2219 mpegtsraw_demuxer_select="mpegts_demuxer"
2220 mxf_d10_muxer_select="mxf_muxer"
2221 nut_muxer_select="riffenc"
2222 nuv_demuxer_select="riffdec"
2223 ogg_demuxer_select="golomb"
2224 psp_muxer_select="mov_muxer"
2225 rtp_demuxer_select="sdp_demuxer"
2226 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2227 rtsp_demuxer_select="http_protocol rtpdec"
2228 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2229 sap_demuxer_select="sdp_demuxer"
2230 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2231 sdp_demuxer_select="rtpdec"
2232 smoothstreaming_muxer_select="ismv_muxer"
2233 spdif_muxer_select="aac_parser"
2234 tak_demuxer_select="tak_parser"
2235 tg2_muxer_select="mov_muxer"
2236 tgp_muxer_select="mov_muxer"
2237 vobsub_demuxer_select="mpegps_demuxer"
2238 w64_demuxer_select="wav_demuxer"
2239 w64_muxer_select="wav_muxer"
2240 wav_demuxer_select="riffdec"
2241 wav_muxer_select="riffenc"
2242 webm_muxer_select="riffenc"
2243 wtv_demuxer_select="riffdec"
2244 xmv_demuxer_select="riffdec"
2245 xwma_demuxer_select="riffdec"
2246
2247 # indevs / outdevs
2248 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2249 alsa_outdev_deps="alsa_asoundlib_h"
2250 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2251 caca_outdev_deps="libcaca"
2252 dshow_indev_deps="IBaseFilter"
2253 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
2254 dv1394_indev_deps="dv1394"
2255 dv1394_indev_select="dv_demuxer"
2256 fbdev_indev_deps="linux_fb_h"
2257 fbdev_outdev_deps="linux_fb_h"
2258 iec61883_indev_deps="libiec61883"
2259 jack_indev_deps="jack_jack_h sem_timedwait"
2260 lavfi_indev_deps="avfilter"
2261 libcdio_indev_deps="libcdio"
2262 libdc1394_indev_deps="libdc1394"
2263 libv4l2_indev_deps="libv4l2"
2264 openal_indev_deps="openal"
2265 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2266 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2267 pulse_indev_deps="libpulse"
2268 pulse_outdev_deps="libpulse"
2269 sdl_outdev_deps="sdl"
2270 sndio_indev_deps="sndio_h"
2271 sndio_outdev_deps="sndio_h"
2272 v4l_indev_deps="linux_videodev_h"
2273 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2274 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2275 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2276 vfwcap_indev_extralibs="-lavicap32"
2277 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2278 xv_outdev_extralibs="-lXv -lX11 -lXext"
2279 x11grab_indev_deps="x11grab"
2280
2281 # protocols
2282 bluray_protocol_deps="libbluray"
2283 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2284 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2285 ffrtmpcrypt_protocol_select="tcp_protocol"
2286 ffrtmphttp_protocol_deps="!librtmp_protocol"
2287 ffrtmphttp_protocol_select="http_protocol"
2288 ftp_protocol_select="tcp_protocol"
2289 gopher_protocol_select="network"
2290 httpproxy_protocol_select="tcp_protocol"
2291 http_protocol_select="tcp_protocol"
2292 https_protocol_select="tls_protocol"
2293 librtmp_protocol_deps="librtmp"
2294 librtmpe_protocol_deps="librtmp"
2295 librtmps_protocol_deps="librtmp"
2296 librtmpt_protocol_deps="librtmp"
2297 librtmpte_protocol_deps="librtmp"
2298 libssh_protocol_deps="libssh"
2299 mmsh_protocol_select="http_protocol"
2300 mmst_protocol_select="network"
2301 rtmp_protocol_deps="!librtmp_protocol"
2302 rtmp_protocol_select="tcp_protocol"
2303 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2304 rtmps_protocol_deps="!librtmp_protocol"
2305 rtmps_protocol_select="tls_protocol"
2306 rtmpt_protocol_select="ffrtmphttp_protocol"
2307 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2308 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2309 rtp_protocol_select="udp_protocol"
2310 sctp_protocol_deps="struct_sctp_event_subscribe"
2311 sctp_protocol_select="network"
2312 srtp_protocol_select="rtp_protocol"
2313 tcp_protocol_select="network"
2314 tls_protocol_deps_any="openssl gnutls"
2315 tls_protocol_select="tcp_protocol"
2316 udp_protocol_select="network"
2317 unix_protocol_deps="sys_un_h"
2318 unix_protocol_select="network"
2319
2320 # filters
2321 aconvert_filter_deps="swresample"
2322 amovie_filter_deps="avcodec avformat"
2323 aresample_filter_deps="swresample"
2324 ass_filter_deps="libass"
2325 asyncts_filter_deps="avresample"
2326 atempo_filter_deps="avcodec"
2327 atempo_filter_select="rdft"
2328 azmq_filter_deps="libzmq"
2329 blackframe_filter_deps="gpl"
2330 boxblur_filter_deps="gpl"
2331 colormatrix_filter_deps="gpl"
2332 cropdetect_filter_deps="gpl"
2333 dctdnoiz_filter_deps="avcodec"
2334 dctdnoiz_filter_select="fft"
2335 delogo_filter_deps="gpl"
2336 deshake_filter_deps="avcodec"
2337 deshake_filter_select="dsputil"
2338 drawtext_filter_deps="libfreetype"
2339 ebur128_filter_deps="gpl"
2340 flite_filter_deps="libflite"
2341 frei0r_filter_deps="frei0r dlopen"
2342 frei0r_filter_extralibs='$ldl'
2343 frei0r_src_filter_deps="frei0r dlopen"
2344 frei0r_src_filter_extralibs='$ldl'
2345 geq_filter_deps="gpl"
2346 histeq_filter_deps="gpl"
2347 hqdn3d_filter_deps="gpl"
2348 interlace_filter_deps="gpl"
2349 kerndeint_filter_deps="gpl"
2350 ladspa_filter_deps="ladspa dlopen"
2351 mcdeint_filter_deps="avcodec gpl"
2352 movie_filter_deps="avcodec avformat"
2353 mp_filter_deps="gpl avcodec swscale inline_asm"
2354 mpdecimate_filter_deps="gpl avcodec"
2355 mptestsrc_filter_deps="gpl"
2356 negate_filter_deps="lut_filter"
2357 perspective_filter_deps="gpl"
2358 resample_filter_deps="avresample"
2359 ocv_filter_deps="libopencv"
2360 owdenoise_filter_deps="gpl"
2361 pan_filter_deps="swresample"
2362 phase_filter_deps="gpl"
2363 pp_filter_deps="gpl postproc"
2364 pullup_filter_deps="gpl"
2365 removelogo_filter_deps="avcodec avformat swscale"
2366 sab_filter_deps="gpl swscale"
2367 scale_filter_deps="swscale"
2368 smartblur_filter_deps="gpl swscale"
2369 showspectrum_filter_deps="avcodec"
2370 showspectrum_filter_select="rdft"
2371 spp_filter_deps="gpl avcodec"
2372 spp_filter_select="fft"
2373 stereo3d_filter_deps="gpl"
2374 subtitles_filter_deps="avformat avcodec libass"
2375 super2xsai_filter_deps="gpl"
2376 tinterlace_filter_deps="gpl"
2377 vidstabdetect_filter_deps="libvidstab"
2378 vidstabtransform_filter_deps="libvidstab"
2379 pixfmts_super2xsai_test_deps="super2xsai_filter"
2380 tinterlace_merge_test_deps="tinterlace_filter"
2381 tinterlace_pad_test_deps="tinterlace_filter"
2382 zmq_filter_deps="libzmq"
2383
2384 # examples
2385 decoding_encoding_example_deps="avcodec avutil"
2386 demuxing_decoding_example_deps="avcodec avformat avutil"
2387 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2388 filtering_video_example_deps="avfilter avcodec avformat avutil"
2389 metadata_example_deps="avformat avutil"
2390 muxing_example_deps="avcodec avformat avutil swscale"
2391 remuxing_example_deps="avcodec avformat avutil"
2392 resampling_audio_example_deps="avutil swresample"
2393 scaling_video_example_deps="avutil swscale"
2394 transcode_aac_example_deps="avcodec avformat swresample"
2395
2396 # libraries
2397 avcodec_deps="avutil"
2398 avdevice_deps="avutil avcodec avformat"
2399 avfilter_deps="avutil"
2400 avformat_deps="avutil avcodec"
2401 avresample_deps="avutil"
2402 postproc_deps="avutil gpl"
2403 swscale_deps="avutil"
2404
2405 # programs
2406 ffmpeg_deps="avcodec avfilter avformat swresample"
2407 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2408                null_filter
2409                setpts_filter trim_filter"
2410 ffplay_deps="avcodec avformat swscale swresample sdl"
2411 ffplay_select="rdft crop_filter"
2412 ffprobe_deps="avcodec avformat"
2413 ffserver_deps="avformat fork sarestart"
2414 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2415 ffserver_extralibs='$ldl'
2416
2417 # documentation
2418 podpages_deps="perl"
2419 manpages_deps="perl pod2man"
2420 htmlpages_deps="perl texi2html"
2421 txtpages_deps="perl makeinfo"
2422 doc_deps_any="manpages htmlpages podpages txtpages"
2423
2424 # default parameters
2425
2426 logfile="config.log"
2427
2428 # installation paths
2429 prefix_default="/usr/local"
2430 bindir_default='${prefix}/bin'
2431 datadir_default='${prefix}/share/ffmpeg'
2432 docdir_default='${prefix}/share/doc/ffmpeg'
2433 incdir_default='${prefix}/include'
2434 libdir_default='${prefix}/lib'
2435 mandir_default='${prefix}/share/man'
2436 shlibdir_default="$libdir_default"
2437
2438 # toolchain
2439 ar_default="ar"
2440 cc_default="gcc"
2441 cxx_default="g++"
2442 host_cc_default="gcc"
2443 cp_f="cp -f"
2444 install="install"
2445 ln_s="ln -s -f"
2446 nm_default="nm -g"
2447 objformat="elf"
2448 pkg_config_default=pkg-config
2449 ranlib="ranlib"
2450 strip_default="strip"
2451 yasmexe_default="yasm"
2452 windres_default="windres"
2453
2454 nogas=":"
2455
2456 # machine
2457 arch_default=$(uname -m)
2458 cpu="generic"
2459
2460 # OS
2461 target_os_default=$(tolower $(uname -s))
2462 host_os=$target_os_default
2463
2464 # configurable options
2465 enable $PROGRAM_LIST
2466 enable $DOCUMENT_LIST
2467 enable $EXAMPLE_LIST
2468 enable $(filter_out avresample $LIBRARY_LIST)
2469 enable stripping
2470
2471 enable asm
2472 enable debug
2473 enable doc
2474 enable optimizations
2475 enable runtime_cpudetect
2476 enable safe_bitstream_reader
2477 enable static
2478 enable swscale_alpha
2479
2480 # Enable hwaccels by default.
2481 enable dxva2 vaapi vdpau xvmc
2482
2483 # build settings
2484 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2485 LIBPREF="lib"
2486 LIBSUF=".a"
2487 FULLNAME='$(NAME)$(BUILDSUF)'
2488 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2489 SLIBPREF="lib"
2490 SLIBSUF=".so"
2491 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2492 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2493 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2494 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2495 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2496 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2497
2498 asflags_filter=echo
2499 cflags_filter=echo
2500 ldflags_filter=echo
2501
2502 AS_C='-c'
2503 AS_O='-o $@'
2504 CC_C='-c'
2505 CC_E='-E -o $@'
2506 CC_O='-o $@'
2507 CXX_C='-c'
2508 CXX_O='-o $@'
2509 LD_O='-o $@'
2510 LD_LIB='-l%'
2511 LD_PATH='-L'
2512 HOSTCC_C='-c'
2513 HOSTCC_E='-E -o $@'
2514 HOSTCC_O='-o $@'
2515 HOSTLD_O='-o $@'
2516
2517 host_libs='-lm'
2518 host_cflags_filter=echo
2519 host_ldflags_filter=echo
2520
2521 target_path='$(CURDIR)'
2522
2523 # since the object filename is not given with the -MM flag, the compiler
2524 # is only able to print the basename, and we must add the path ourselves
2525 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2526 DEPFLAGS='-MM'
2527
2528 # find source path
2529 if test -f configure; then
2530     source_path=.
2531 else
2532     source_path=$(cd $(dirname "$0"); pwd)
2533     echo "$source_path" | grep -q '[[:blank:]]' &&
2534         die "Out of tree builds are impossible with whitespace in source path."
2535     test -e "$source_path/config.h" &&
2536         die "Out of tree builds are impossible with config.h in source dir."
2537 fi
2538
2539 for v in "$@"; do
2540     r=${v#*=}
2541     l=${v%"$r"}
2542     r=$(sh_quote "$r")
2543     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2544 done
2545
2546 find_things(){
2547     thing=$1
2548     pattern=$2
2549     file=$source_path/$3
2550     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2551 }
2552
2553 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2554 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2555 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2556 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2557 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2558 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2559 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2560 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2561 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2562 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2563 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2564
2565 ALL_COMPONENTS="
2566     $BSF_LIST
2567     $DECODER_LIST
2568     $DEMUXER_LIST
2569     $ENCODER_LIST
2570     $FILTER_LIST
2571     $HWACCEL_LIST
2572     $INDEV_LIST
2573     $MUXER_LIST
2574     $OUTDEV_LIST
2575     $PARSER_LIST
2576     $PROTOCOL_LIST
2577 "
2578
2579 for n in $COMPONENT_LIST; do
2580     v=$(toupper ${n%s})_LIST
2581     eval enable \$$v
2582     eval ${n}_if_any="\$$v"
2583 done
2584
2585 enable $ARCH_EXT_LIST
2586
2587 die_unknown(){
2588     echo "Unknown option \"$1\"."
2589     echo "See $0 --help for available options."
2590     exit 1
2591 }
2592
2593 print_3_columns() {
2594     cat | tr ' ' '\n' | sort | pr -r -3 -t
2595 }
2596
2597 show_list() {
2598     suffix=_$1
2599     shift
2600     echo $* | sed s/$suffix//g | print_3_columns
2601     exit 0
2602 }
2603
2604 rand_list(){
2605     IFS=', '
2606     set -- $*
2607     unset IFS
2608     for thing; do
2609         comp=${thing%:*}
2610         prob=${thing#$comp}
2611         prob=${prob#:}
2612         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2613         echo "prob ${prob:-0.5}"
2614         printf '%s\n' $comp
2615     done
2616 }
2617
2618 do_random(){
2619     action=$1
2620     shift
2621     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2622     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2623 }
2624
2625 for opt do
2626     optval="${opt#*=}"
2627     case "$opt" in
2628         --extra-ldflags=*)
2629             add_ldflags $optval
2630         ;;
2631         --extra-libs=*)
2632             add_extralibs $optval
2633         ;;
2634         --disable-devices)
2635             disable $INDEV_LIST $OUTDEV_LIST
2636         ;;
2637         --enable-debug=*)
2638             debuglevel="$optval"
2639         ;;
2640         --disable-programs)
2641             disable $PROGRAM_LIST
2642         ;;
2643         --disable-everything)
2644             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2645         ;;
2646         --disable-all)
2647             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2648             disable $LIBRARY_LIST $PROGRAM_LIST doc
2649         ;;
2650         --enable-random|--disable-random)
2651             action=${opt%%-random}
2652             do_random ${action#--} $COMPONENT_LIST
2653         ;;
2654         --enable-random=*|--disable-random=*)
2655             action=${opt%%-random=*}
2656             do_random ${action#--} $optval
2657         ;;
2658         --enable-*=*|--disable-*=*)
2659             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2660             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2661             eval list=\$$(toupper $thing)_LIST
2662             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2663             list=$(filter "$name" $list)
2664             [ "$list" = "" ] && warn "Option $opt did not match anything"
2665             $action $list
2666         ;;
2667         --enable-?*|--disable-?*)
2668             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2669             if is_in $option $COMPONENT_LIST; then
2670                 test $action = disable && action=unset
2671                 eval $action \$$(toupper ${option%s})_LIST
2672             elif is_in $option $CMDLINE_SELECT; then
2673                 $action $option
2674             else
2675                 die_unknown $opt
2676             fi
2677         ;;
2678         --list-*)
2679             NAME="${opt#--list-}"
2680             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2681             NAME=${NAME%s}
2682             eval show_list $NAME \$$(toupper $NAME)_LIST
2683         ;;
2684         --help|-h) show_help
2685         ;;
2686         --fatal-warnings) enable fatal_warnings
2687         ;;
2688         *)
2689             optname="${opt%%=*}"
2690             optname="${optname#--}"
2691             optname=$(echo "$optname" | sed 's/-/_/g')
2692             if is_in $optname $CMDLINE_SET; then
2693                 eval $optname='$optval'
2694             elif is_in $optname $CMDLINE_APPEND; then
2695                 append $optname "$optval"
2696             else
2697                 die_unknown $opt
2698             fi
2699         ;;
2700     esac
2701 done
2702
2703 disabled logging && logfile=/dev/null
2704
2705 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2706 set >> $logfile
2707
2708 test -n "$cross_prefix" && enable cross_compile
2709
2710 if enabled cross_compile; then
2711     test -n "$arch" && test -n "$target_os" ||
2712         die "Must specify target arch and OS when cross-compiling"
2713 fi
2714
2715 ar_default="${cross_prefix}${ar_default}"
2716 cc_default="${cross_prefix}${cc_default}"
2717 cxx_default="${cross_prefix}${cxx_default}"
2718 nm_default="${cross_prefix}${nm_default}"
2719 pkg_config_default="${cross_prefix}${pkg_config_default}"
2720 ranlib="${cross_prefix}${ranlib}"
2721 strip_default="${cross_prefix}${strip_default}"
2722 windres_default="${cross_prefix}${windres_default}"
2723
2724 sysinclude_default="${sysroot}/usr/include"
2725
2726 test -n "$valgrind" && toolchain="valgrind-memcheck"
2727
2728 case "$toolchain" in
2729     clang-asan)
2730         cc_default="clang"
2731         add_cflags  -fsanitize=address
2732         add_ldflags -fsanitize=address
2733     ;;
2734     clang-tsan)
2735         cc_default="clang"
2736         add_cflags  -fsanitize=thread -pie
2737         add_ldflags -fsanitize=thread -pie
2738     ;;
2739     gcc-asan)
2740         cc_default="gcc"
2741         add_cflags  -fsanitize=address
2742         add_ldflags -fsanitize=address
2743     ;;
2744     gcc-tsan)
2745         cc_default="gcc"
2746         add_cflags  -fsanitize=thread -pie -fPIC
2747         add_ldflags -fsanitize=thread -pie -fPIC
2748     ;;
2749     valgrind-massif)
2750         target_exec_default=${valgrind:-"valgrind"}
2751         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"
2752     ;;
2753     valgrind-memcheck)
2754         target_exec_default=${valgrind:-"valgrind"}
2755         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
2756     ;;
2757     msvc)
2758         # Check whether the current MSVC version needs the C99 converter.
2759         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2760         # support enough of C99 to build ffmpeg. Default to the new
2761         # behaviour if the regexp was unable to match anything, since this
2762         # successfully parses the version number of existing supported
2763         # versions that require the converter (MSVC 2010 and 2012).
2764         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2765         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2766             cc_default="cl"
2767         else
2768             cc_default="c99wrap cl"
2769         fi
2770         ld_default="link"
2771         nm_default="dumpbin -symbols"
2772         ar_default="lib"
2773         target_os_default="win32"
2774         # Use a relative path for TMPDIR. This makes sure all the
2775         # ffconf temp files are written with a relative path, avoiding
2776         # issues with msys/win32 path conversion for MSVC parameters
2777         # such as -Fo<file> or -out:<file>.
2778         TMPDIR=.
2779     ;;
2780     icl)
2781         cc_default="icl"
2782         ld_default="xilink"
2783         nm_default="dumpbin -symbols"
2784         ar_default="xilib"
2785         target_os_default="win32"
2786         TMPDIR=.
2787     ;;
2788     gcov)
2789         add_cflags  -fprofile-arcs -ftest-coverage
2790         add_ldflags -fprofile-arcs -ftest-coverage
2791     ;;
2792     hardened)
2793         add_cflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2794         add_ldflags -Wl,-z,relro -Wl,-z,now
2795     ;;
2796     ?*)
2797         die "Unknown toolchain $toolchain"
2798     ;;
2799 esac
2800
2801 set_default arch cc cxx pkg_config strip sysinclude target_exec target_os yasmexe
2802 enabled cross_compile || host_cc_default=$cc
2803 set_default host_cc
2804
2805 if ! $pkg_config --version >/dev/null 2>&1; then
2806     warn "$pkg_config not found, library detection may fail."
2807     pkg_config=false
2808 fi
2809
2810 exesuf() {
2811     case $1 in
2812         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2813     esac
2814 }
2815
2816 EXESUF=$(exesuf $target_os)
2817 HOSTEXESUF=$(exesuf $host_os)
2818
2819 # set temporary file name
2820 : ${TMPDIR:=$TEMPDIR}
2821 : ${TMPDIR:=$TMP}
2822 : ${TMPDIR:=/tmp}
2823
2824 if [ -n "$tempprefix" ] ; then
2825     mktemp(){
2826         echo $tempprefix.${HOSTNAME}.${UID}
2827     }
2828 elif ! check_cmd mktemp -u XXXXXX; then
2829     # simple replacement for missing mktemp
2830     # NOT SAFE FOR GENERAL USE
2831     mktemp(){
2832         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2833     }
2834 fi
2835
2836 tmpfile(){
2837     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2838         (set -C; exec > $tmp) 2>/dev/null ||
2839         die "Unable to create temporary file in $TMPDIR."
2840     append TMPFILES $tmp
2841     eval $1=$tmp
2842 }
2843
2844 trap 'rm -f -- $TMPFILES' EXIT
2845
2846 tmpfile TMPASM .asm
2847 tmpfile TMPC   .c
2848 tmpfile TMPCPP .cpp
2849 tmpfile TMPE   $EXESUF
2850 tmpfile TMPH   .h
2851 tmpfile TMPO   .o
2852 tmpfile TMPS   .S
2853 tmpfile TMPSH  .sh
2854 tmpfile TMPV   .ver
2855
2856 unset -f mktemp
2857
2858 chmod +x $TMPE
2859
2860 # make sure we can execute files in $TMPDIR
2861 cat > $TMPSH 2>> $logfile <<EOF
2862 #! /bin/sh
2863 EOF
2864 chmod +x $TMPSH >> $logfile 2>&1
2865 if ! $TMPSH >> $logfile 2>&1; then
2866     cat <<EOF
2867 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2868 variable to another directory and make sure that it is not mounted noexec.
2869 EOF
2870     die "Sanity test failed."
2871 fi
2872
2873 ccc_flags(){
2874     for flag; do
2875         case $flag in
2876             -std=c99)           echo -c99                       ;;
2877             -mcpu=*)            echo -arch ${flag#*=}           ;;
2878             -mieee)             echo -ieee                      ;;
2879             -O*|-fast)          echo $flag                      ;;
2880             -fno-math-errno)    echo -assume nomath_errno       ;;
2881             -g)                 echo -g3                        ;;
2882             -Wall)              echo -msg_enable level2         ;;
2883             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2884             -Wl,*)              echo $flag                      ;;
2885             -f*|-W*)                                            ;;
2886             *)                  echo $flag                      ;;
2887         esac
2888    done
2889 }
2890
2891 cparser_flags(){
2892     for flag; do
2893         case $flag in
2894             -Wno-switch)             echo -Wno-switch-enum ;;
2895             -Wno-format-zero-length) ;;
2896             -Wdisabled-optimization) ;;
2897             -Wno-pointer-sign)       echo -Wno-other ;;
2898             *)                       echo $flag ;;
2899         esac
2900     done
2901 }
2902
2903 msvc_common_flags(){
2904     for flag; do
2905         case $flag in
2906             # In addition to specifying certain flags under the compiler
2907             # specific filters, they must be specified here as well or else the
2908             # generic catch all at the bottom will print the original flag.
2909             -Wall)                ;;
2910             -std=c99)             ;;
2911             # Common flags
2912             -fomit-frame-pointer) ;;
2913             -g)                   echo -Z7 ;;
2914             -fno-math-errno)      ;;
2915             -fno-common)          ;;
2916             -fno-signed-zeros)    ;;
2917             -fPIC)                ;;
2918             -mthumb)              ;;
2919             -march=*)             ;;
2920             -lz)                  echo zlib.lib ;;
2921             -lavifil32)           echo vfw32.lib ;;
2922             -lavicap32)           echo vfw32.lib user32.lib ;;
2923             -l*)                  echo ${flag#-l}.lib ;;
2924             *)                    echo $flag ;;
2925         esac
2926     done
2927 }
2928
2929 msvc_flags(){
2930     msvc_common_flags "$@"
2931     for flag; do
2932         case $flag in
2933             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2934                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2935                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2936                                        -wd4554 \
2937                                        -wd4273 ;;
2938         esac
2939     done
2940 }
2941
2942 icl_flags(){
2943     msvc_common_flags "$@"
2944     for flag; do
2945         case $flag in
2946             # Despite what Intel's documentation says -Wall, which is supported
2947             # on Windows, does enable remarks so disable them here.
2948             -Wall)                echo $flag -Qdiag-disable:remark ;;
2949             -std=c99)             echo -Qstd=c99 ;;
2950         esac
2951     done
2952 }
2953
2954 pgi_flags(){
2955     for flag; do
2956         case $flag in
2957             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2958             -fomit-frame-pointer) echo -Mnoframe ;;
2959             -g)                   echo -gopt ;;
2960             *)                    echo $flag ;;
2961         esac
2962     done
2963 }
2964
2965 suncc_flags(){
2966     for flag; do
2967         case $flag in
2968             -march=*|-mcpu=*)
2969                 case "${flag#*=}" in
2970                     native)                   echo -xtarget=native       ;;
2971                     v9|niagara)               echo -xarch=sparc          ;;
2972                     ultrasparc)               echo -xarch=sparcvis       ;;
2973                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2974                     i586|pentium)             echo -xchip=pentium        ;;
2975                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2976                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2977                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2978                     pentium4*)          echo -xtarget=pentium4           ;;
2979                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2980                     *-sse3)             echo -xarch=sse3                 ;;
2981                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2982                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2983                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2984                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
2985                     bdver*)                    echo -xarch=avx           ;;
2986                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2987                     k8|opteron|athlon64|athlon-fx)
2988                                                echo -xarch=sse2a         ;;
2989                     athlon*)                   echo -xarch=pentium_proa  ;;
2990                 esac
2991                 ;;
2992             -std=c99)             echo -xc99              ;;
2993             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2994             -fPIC)                echo -KPIC -xcode=pic32 ;;
2995             -W*,*)                echo $flag              ;;
2996             -f*-*|-W*|-mimpure-text)                      ;;
2997             -shared)              echo -G                 ;;
2998             *)                    echo $flag              ;;
2999         esac
3000     done
3001 }
3002
3003 tms470_flags(){
3004     for flag; do
3005         case $flag in
3006             -march=*|-mcpu=*)
3007                 case "${flag#*=}" in
3008                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3009                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3010                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3011                     armv6*|arm11*)          echo -mv=6   ;;
3012                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3013                                             echo -mv=5e  ;;
3014                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3015                 esac
3016                 ;;
3017             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3018             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3019             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3020             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3021             -msoft-float)   echo --float_support=vfplib       ;;
3022             -O[0-3]|-mf=*)  echo $flag                        ;;
3023             -g)             echo -g -mn                       ;;
3024             -pds=*)         echo $flag                        ;;
3025             -D*|-I*)        echo $flag                        ;;
3026             --gcc|--abi=*)  echo $flag                        ;;
3027             -me)            echo $flag                        ;;
3028         esac
3029     done
3030 }
3031
3032 probe_cc(){
3033     pfx=$1
3034     _cc=$2
3035
3036     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3037     unset _ld_o _ldflags _ld_lib _ld_path
3038     unset _depflags _DEPCMD _DEPFLAGS
3039     _flags_filter=echo
3040
3041     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3042         true # no-op to avoid reading stdin in following checks
3043     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3044         _type=llvm_gcc
3045         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
3046         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
3047         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3048         _cflags_speed='-O3'
3049         _cflags_size='-Os'
3050     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3051         _type=gcc
3052         gcc_version=$($_cc --version | head -n1)
3053         gcc_basever=$($_cc -dumpversion)
3054         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3055         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3056         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3057         if ! $_cc -dumpversion | grep -q '^2\.'; then
3058             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3059         fi
3060         _cflags_speed='-O3'
3061         _cflags_size='-Os'
3062     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3063         _type=icc
3064         _ident=$($_cc --version | head -n1)
3065         _depflags='-MMD'
3066         _cflags_speed='-O3'
3067         _cflags_size='-Os'
3068         _cflags_noopt='-O1'
3069     elif $_cc -v 2>&1 | grep -q xlc; then
3070         _type=xlc
3071         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3072         _cflags_speed='-O5'
3073         _cflags_size='-O5 -qcompact'
3074     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3075         _type=ccc
3076         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3077         _DEPFLAGS='-M'
3078         _cflags_speed='-fast'
3079         _cflags_size='-O1'
3080         _flags_filter=ccc_flags
3081     elif $_cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
3082         test -d "$sysroot" || die "No valid sysroot specified."
3083         _type=armcc
3084         _ident=$($_cc --vsn | head -n1)
3085         armcc_conf="$PWD/armcc.conf"
3086         $_cc --arm_linux_configure                 \
3087              --arm_linux_config_file="$armcc_conf" \
3088              --configure_sysroot="$sysroot"        \
3089              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3090              die "Error creating armcc configuration file."
3091         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3092         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3093         as_default="${cross_prefix}gcc"
3094         _depflags='-MMD'
3095         _cflags_speed='-O3'
3096         _cflags_size='-Os'
3097     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3098         _type=tms470
3099         _ident=$($_cc -version | head -n1 | tr -s ' ')
3100         _flags='--gcc --abi=eabi -me'
3101         _cc_e='-ppl -fe=$@'
3102         _cc_o='-fe=$@'
3103         _depflags='-ppa -ppd=$(@:.o=.d)'
3104         _cflags_speed='-O3 -mf=5'
3105         _cflags_size='-O3 -mf=2'
3106         _flags_filter=tms470_flags
3107     elif $_cc -v 2>&1 | grep -q clang; then
3108         _type=clang
3109         _ident=$($_cc --version | head -n1)
3110         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3111         _cflags_speed='-O3'
3112         _cflags_size='-Os'
3113     elif $_cc -V 2>&1 | grep -q Sun; then
3114         _type=suncc
3115         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3116         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3117         _DEPFLAGS='-xM1 -xc99'
3118         _ldflags='-std=c99'
3119         _cflags_speed='-O5'
3120         _cflags_size='-O5 -xspace'
3121         _flags_filter=suncc_flags
3122     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3123         _type=pathscale
3124         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3125         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3126         _cflags_speed='-O2'
3127         _cflags_size='-Os'
3128         _flags_filter='filter_out -Wdisabled-optimization'
3129     elif $_cc -v 2>&1 | grep -q Open64; then
3130         _type=open64
3131         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3132         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3133         _cflags_speed='-O2'
3134         _cflags_size='-Os'
3135         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3136     elif $_cc -V 2>&1 | grep -q Portland; then
3137         _type=pgi
3138         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3139         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3140         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3141         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3142         _cflags_noopt="-O"
3143         _flags_filter=pgi_flags
3144     elif $_cc 2>&1 | grep -q Microsoft; then
3145         _type=msvc
3146         _ident=$($cc 2>&1 | head -n1)
3147         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3148         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3149         _cflags_speed="-O2"
3150         _cflags_size="-O1"
3151         if $_cc 2>&1 | grep -q Linker; then
3152             _ld_o='-out:$@'
3153         else
3154             _ld_o='-Fe$@'
3155         fi
3156         _cc_o='-Fo$@'
3157         _cc_e='-P -Fi$@'
3158         _flags_filter=msvc_flags
3159         _ld_lib='lib%.a'
3160         _ld_path='-libpath:'
3161         _flags='-nologo'
3162         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3163         if [ $pfx = hostcc ]; then
3164             append _cflags -Dsnprintf=_snprintf
3165         fi
3166         disable stripping
3167     elif $_cc 2>&1 | grep -q Intel; then
3168         _type=icl
3169         _ident=$($cc 2>&1 | head -n1)
3170         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3171         # Not only is O3 broken on 13.x+ but it is slower on all previous
3172         # versions (tested) as well.
3173         _cflags_speed="-O2"
3174         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3175         if $_cc 2>&1 | grep -q Linker; then
3176             _ld_o='-out:$@'
3177         else
3178             _ld_o='-Fe$@'
3179         fi
3180         _cc_o='-Fo$@'
3181         _cc_e='-P'
3182         _flags_filter=icl_flags
3183         _ld_lib='lib%.a'
3184         _ld_path='-libpath:'
3185         # -Qdiag-error to make icl error when seeing certain unknown arguments
3186         _flags='-nologo -Qdiag-error:4044,10157'
3187         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3188         # with MSVC which enables it by default.
3189         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
3190         if [ $pfx = hostcc ]; then
3191             append _cflags -Dsnprintf=_snprintf
3192         fi
3193     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3194         _type=cparser
3195         _ident=$($_cc --version | head -n1)
3196         _depflags='-MMD'
3197         _cflags_speed='-O4'
3198         _cflags_size='-O2'
3199         _flags_filter=cparser_flags
3200     fi
3201
3202     eval ${pfx}_type=\$_type
3203     eval ${pfx}_ident=\$_ident
3204 }
3205
3206 set_ccvars(){
3207     eval ${1}_C=\${_cc_c-\${${1}_C}}
3208     eval ${1}_E=\${_cc_e-\${${1}_E}}
3209     eval ${1}_O=\${_cc_o-\${${1}_O}}
3210
3211     if [ -n "$_depflags" ]; then
3212         eval ${1}_DEPFLAGS=\$_depflags
3213     else
3214         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3215         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3216         eval DEP${1}FLAGS=\$_flags
3217     fi
3218 }
3219
3220 probe_cc cc "$cc"
3221 cflags_filter=$_flags_filter
3222 cflags_speed=$_cflags_speed
3223 cflags_size=$_cflags_size
3224 cflags_noopt=$_cflags_noopt
3225 add_cflags $_flags $_cflags
3226 cc_ldflags=$_ldflags
3227 set_ccvars CC
3228
3229 probe_cc hostcc "$host_cc"
3230 host_cflags_filter=$_flags_filter
3231 add_host_cflags  $_flags $_cflags
3232 set_ccvars HOSTCC
3233
3234 test -n "$cc_type" && enable $cc_type ||
3235     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3236
3237 : ${as_default:=$cc}
3238 : ${dep_cc_default:=$cc}
3239 : ${ld_default:=$cc}
3240 : ${host_ld_default:=$host_cc}
3241 set_default ar as dep_cc ld host_ld windres
3242
3243 probe_cc as "$as"
3244 asflags_filter=$_flags_filter
3245 add_asflags $_flags $_cflags
3246 set_ccvars AS
3247
3248 probe_cc ld "$ld"
3249 ldflags_filter=$_flags_filter
3250 add_ldflags $_flags $_ldflags
3251 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3252 LD_O=${_ld_o-$LD_O}
3253 LD_LIB=${_ld_lib-$LD_LIB}
3254 LD_PATH=${_ld_path-$LD_PATH}
3255
3256 probe_cc hostld "$host_ld"
3257 host_ldflags_filter=$_flags_filter
3258 add_host_ldflags $_flags $_ldflags
3259 HOSTLD_O=${_ld_o-$HOSTLD_O}
3260
3261 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3262     probe_cc depcc "$dep_cc"
3263     CCDEP=${_DEPCMD:-$DEPCMD}
3264     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3265     DEPCCFLAGS=$_flags
3266 fi
3267
3268 if $ar 2>&1 | grep -q Microsoft; then
3269     arflags="-nologo"
3270     ar_o='-out:$@'
3271 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3272     arflags="rq"
3273     ar_o='$@'
3274 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3275     arflags='-Xany -r -c'
3276     ar_o='$@'
3277 else
3278     arflags="rc"
3279     ar_o='$@'
3280 fi
3281
3282 add_cflags $extra_cflags
3283 add_cxxflags $extra_cxxflags
3284 add_asflags $extra_cflags
3285
3286 if test -n "$sysroot"; then
3287     case "$cc_type" in
3288         gcc|llvm_gcc|clang)
3289             add_cppflags --sysroot="$sysroot"
3290             add_ldflags --sysroot="$sysroot"
3291         ;;
3292         tms470)
3293             add_cppflags -I"$sysinclude"
3294             add_ldflags  --sysroot="$sysroot"
3295         ;;
3296     esac
3297 fi
3298
3299 if test "$cpu" = host; then
3300     enabled cross_compile &&
3301         die "--cpu=host makes no sense when cross-compiling."
3302
3303     case "$cc_type" in
3304         gcc|llvm_gcc)
3305             check_native(){
3306                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3307                 sed -n "/cc1.*$1=/{
3308                             s/.*$1=\\([^ ]*\\).*/\\1/
3309                             p
3310                             q
3311                         }" $TMPE
3312             }
3313             cpu=$(check_native -march || check_native -mcpu)
3314         ;;
3315     esac
3316
3317     test "${cpu:-host}" = host &&
3318         die "--cpu=host not supported with compiler $cc"
3319 fi
3320
3321 # Deal with common $arch aliases
3322 case "$arch" in
3323     aarch64|arm64)
3324         arch="aarch64"
3325     ;;
3326     arm*|iPad*|iPhone*)
3327         arch="arm"
3328     ;;
3329     mips*|IP*)
3330         arch="mips"
3331     ;;
3332     parisc*|hppa*)
3333         arch="parisc"
3334     ;;
3335     "Power Macintosh"|ppc*|powerpc*)
3336         arch="ppc"
3337     ;;
3338     s390|s390x)
3339         arch="s390"
3340     ;;
3341     sh4|sh)
3342         arch="sh4"
3343     ;;
3344     sun4u|sparc*)
3345         arch="sparc"
3346     ;;
3347     tilegx|tile-gx)
3348         arch="tilegx"
3349     ;;
3350     i[3-6]86|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3351         arch="x86"
3352     ;;
3353 esac
3354
3355 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3356 enable $arch
3357
3358 # Add processor-specific flags
3359 if enabled aarch64; then
3360
3361     case $cpu in
3362         armv*)
3363             cpuflags="-march=$cpu"
3364         ;;
3365         *)
3366             cpuflags="-mcpu=$cpu"
3367         ;;
3368     esac
3369
3370 elif enabled alpha; then
3371
3372     cpuflags="-mcpu=$cpu"
3373
3374 elif enabled arm; then
3375
3376     check_arm_arch() {
3377         check_cpp_condition stddef.h \
3378             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3379             $cpuflags
3380     }
3381
3382     probe_arm_arch() {
3383         if   check_arm_arch 4;        then echo armv4;
3384         elif check_arm_arch 4T;       then echo armv4t;
3385         elif check_arm_arch 5;        then echo armv5;
3386         elif check_arm_arch 5E;       then echo armv5e;
3387         elif check_arm_arch 5T;       then echo armv5t;
3388         elif check_arm_arch 5TE;      then echo armv5te;
3389         elif check_arm_arch 5TEJ;     then echo armv5te;
3390         elif check_arm_arch 6;        then echo armv6;
3391         elif check_arm_arch 6J;       then echo armv6j;
3392         elif check_arm_arch 6K;       then echo armv6k;
3393         elif check_arm_arch 6Z;       then echo armv6z;
3394         elif check_arm_arch 6ZK;      then echo armv6zk;
3395         elif check_arm_arch 6T2;      then echo armv6t2;
3396         elif check_arm_arch 7;        then echo armv7;
3397         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3398         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3399         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3400         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3401         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3402         fi
3403     }
3404
3405     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3406
3407     case $cpu in
3408         armv*)
3409             cpuflags="-march=$cpu"
3410             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3411         ;;
3412         *)
3413             cpuflags="-mcpu=$cpu"
3414             case $cpu in
3415                 cortex-a*)                               subarch=armv7a  ;;
3416                 cortex-r*)                               subarch=armv7r  ;;
3417                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3418                 arm11*)                                  subarch=armv6   ;;
3419                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3420                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3421                 *)                             subarch=$(probe_arm_arch) ;;
3422             esac
3423         ;;
3424     esac
3425
3426     case "$subarch" in
3427         armv5t*)    enable fast_clz                ;;
3428         armv[6-8]*) enable fast_clz fast_unaligned ;;
3429     esac
3430
3431 elif enabled avr32; then
3432
3433     case $cpu in
3434         ap7[02]0[0-2])
3435             subarch="avr32_ap"
3436             cpuflags="-mpart=$cpu"
3437         ;;
3438         ap)
3439             subarch="avr32_ap"
3440             cpuflags="-march=$cpu"
3441         ;;
3442         uc3[ab]*)
3443             subarch="avr32_uc"
3444             cpuflags="-mcpu=$cpu"
3445         ;;
3446         uc)
3447             subarch="avr32_uc"
3448             cpuflags="-march=$cpu"
3449         ;;
3450     esac
3451
3452 elif enabled bfin; then
3453
3454     cpuflags="-mcpu=$cpu"
3455
3456 elif enabled mips; then
3457
3458     cpuflags="-march=$cpu"
3459
3460     case $cpu in
3461         24kc)
3462             disable mipsfpu
3463             disable mipsdspr1
3464             disable mipsdspr2
3465         ;;
3466         24kf*)
3467             disable mipsdspr1
3468             disable mipsdspr2
3469         ;;
3470         24kec|34kc|1004kc)
3471             disable mipsfpu
3472             disable mipsdspr2
3473         ;;
3474         24kef*|34kf*|1004kf*)
3475             disable mipsdspr2
3476         ;;
3477         74kc)
3478             disable mipsfpu
3479         ;;
3480     esac
3481
3482 elif enabled ppc; then
3483
3484     case $(tolower $cpu) in
3485         601|ppc601|powerpc601)
3486             cpuflags="-mcpu=601"
3487             disable altivec
3488         ;;
3489         603*|ppc603*|powerpc603*)
3490             cpuflags="-mcpu=603"
3491             disable altivec
3492         ;;
3493         604*|ppc604*|powerpc604*)
3494             cpuflags="-mcpu=604"
3495             disable altivec
3496         ;;
3497         g3|75*|ppc75*|powerpc75*)
3498             cpuflags="-mcpu=750"
3499             disable altivec
3500         ;;
3501         g4|745*|ppc745*|powerpc745*)
3502             cpuflags="-mcpu=7450"
3503         ;;
3504         74*|ppc74*|powerpc74*)
3505             cpuflags="-mcpu=7400"
3506         ;;
3507         g5|970|ppc970|powerpc970)
3508             cpuflags="-mcpu=970"
3509         ;;
3510         power[3-7]*)
3511             cpuflags="-mcpu=$cpu"
3512         ;;
3513         cell)
3514             cpuflags="-mcpu=cell"
3515             enable ldbrx
3516         ;;
3517         e500mc)
3518             cpuflags="-mcpu=e500mc"
3519             disable altivec
3520         ;;
3521         e500v2)
3522             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3523             disable altivec
3524         ;;
3525         e500)
3526             cpuflags="-mcpu=8540 -mhard-float"
3527             disable altivec
3528         ;;
3529     esac
3530
3531 elif enabled sparc; then
3532
3533     case $cpu in
3534         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3535             cpuflags="-mcpu=$cpu"
3536             disable vis
3537         ;;
3538         ultrasparc*|niagara[234])
3539             cpuflags="-mcpu=$cpu"
3540         ;;
3541     esac
3542
3543 elif enabled x86; then
3544
3545     case $cpu in
3546         i[345]86|pentium)
3547             cpuflags="-march=$cpu"
3548             disable mmx
3549         ;;
3550         # targets that do NOT support nopl and conditional mov (cmov)
3551         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3552             cpuflags="-march=$cpu"
3553             disable i686
3554         ;;
3555         # targets that do support nopl and conditional mov (cmov)
3556         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3557             cpuflags="-march=$cpu"
3558             enable i686
3559             enable fast_cmov
3560         ;;
3561         # targets that do support conditional mov but on which it's slow
3562         pentium4|pentium4m|prescott|nocona)
3563             cpuflags="-march=$cpu"
3564             enable i686
3565             disable fast_cmov
3566         ;;
3567     esac
3568
3569 fi
3570
3571 if [ "$cpu" != generic ]; then
3572     add_cflags  $cpuflags
3573     add_asflags $cpuflags
3574 fi
3575
3576 # compiler sanity check
3577 check_exec <<EOF
3578 int main(void){ return 0; }
3579 EOF
3580 if test "$?" != 0; then
3581     echo "$cc is unable to create an executable file."
3582     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3583         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3584         echo "Only do this if you know what cross compiling means."
3585     fi
3586     die "C compiler test failed."
3587 fi
3588
3589 add_cppflags -D_ISOC99_SOURCE
3590 add_cxxflags -D__STDC_CONSTANT_MACROS
3591 check_cflags -std=c99
3592 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3593 #include <stdlib.h>
3594 EOF
3595 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3596 #include <stdlib.h>
3597 EOF
3598
3599 add_host_cppflags -D_ISOC99_SOURCE
3600 check_host_cflags -std=c99
3601 check_host_cflags -Wall
3602 check_host_cflags -O3
3603
3604 check_64bit(){
3605     arch32=$1
3606     arch64=$2
3607     expr=$3
3608     check_code cc "" "int test[2*($expr) - 1]" &&
3609         subarch=$arch64 || subarch=$arch32
3610 }
3611
3612 case "$arch" in
3613     aarch64|alpha|ia64)
3614         spic=$shared
3615     ;;
3616     mips)
3617         check_64bit mips mips64 '_MIPS_SIM > 1'
3618         spic=$shared
3619     ;;
3620     parisc)
3621         check_64bit parisc parisc64 'sizeof(void *) > 4'
3622         spic=$shared
3623     ;;
3624     ppc)
3625         check_64bit ppc ppc64 'sizeof(void *) > 4'
3626         spic=$shared
3627     ;;
3628     sparc)
3629         check_64bit sparc sparc64 'sizeof(void *) > 4'
3630         spic=$shared
3631     ;;
3632     x86)
3633         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3634         if test "$subarch" = "x86_64"; then
3635             spic=$shared
3636         fi
3637     ;;
3638     ppc)
3639         check_cc <<EOF && subarch="ppc64"
3640         int test[(int)sizeof(char*) - 7];
3641 EOF
3642     ;;
3643 esac
3644
3645 enable $subarch
3646 enabled spic && enable_weak pic
3647
3648 # OS specific
3649 case $target_os in
3650     aix)
3651         SHFLAGS=-shared
3652         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3653         enabled shared && add_ldflags -Wl,-brtl
3654         ;;
3655     haiku)
3656         prefix_default="/boot/common"
3657         network_extralibs="-lnetwork"
3658         host_libs=
3659         ;;
3660     sunos)
3661         SHFLAGS='-shared -Wl,-h,$$(@F)'
3662         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3663         network_extralibs="-lsocket -lnsl"
3664         # When using suncc to build, the Solaris linker will mark
3665         # an executable with each instruction set encountered by
3666         # the Solaris assembler.  As our libraries contain their own
3667         # guards for processor-specific code, instead suppress
3668         # generation of the HWCAPS ELF section on Solaris x86 only.
3669         enabled_all suncc x86 &&
3670             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3671             add_ldflags -Wl,-M,mapfile
3672         nm_default='nm -P -g'
3673         ;;
3674     netbsd)
3675         disable symver
3676         oss_indev_extralibs="-lossaudio"
3677         oss_outdev_extralibs="-lossaudio"
3678         enabled gcc || check_ldflags -Wl,-zmuldefs
3679         ;;
3680     openbsd|bitrig)
3681         disable symver
3682         SHFLAGS='-shared'
3683         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3684         SLIB_INSTALL_LINKS=
3685         oss_indev_extralibs="-lossaudio"
3686         oss_outdev_extralibs="-lossaudio"
3687         ;;
3688     dragonfly)
3689         disable symver
3690         ;;
3691     freebsd)
3692         ;;
3693     bsd/os)
3694         add_extralibs -lpoll -lgnugetopt
3695         strip="strip -d"
3696         ;;
3697     darwin)
3698         gas="gas-preprocessor.pl $cc"
3699         enabled ppc && add_asflags -force_cpusubtype_ALL
3700         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3701         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3702         strip="${strip} -x"
3703         add_ldflags -Wl,-dynamic,-search_paths_first
3704         SLIBSUF=".dylib"
3705         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3706         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3707         objformat="macho"
3708         enabled x86_64 && objformat="macho64"
3709         enabled_any pic shared ||
3710             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3711         ;;
3712     mingw32*)
3713         if test $target_os = "mingw32ce"; then
3714             disable network
3715         else
3716             target_os=mingw32
3717         fi
3718         LIBTARGET=i386
3719         if enabled x86_64; then
3720             LIBTARGET="i386:x86-64"
3721         elif enabled arm; then
3722             LIBTARGET=arm-wince
3723         fi
3724         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3725         check_ldflags -Wl,--nxcompat
3726         check_ldflags -Wl,--dynamicbase
3727         shlibdir_default="$bindir_default"
3728         SLIBPREF=""
3729         SLIBSUF=".dll"
3730         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3731         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3732         dlltool="${cross_prefix}dlltool"
3733         if check_cmd lib.exe -list; then
3734             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3735             if enabled x86_64; then
3736                 LIBTARGET=x64
3737             fi
3738         elif check_cmd $dlltool --version; then
3739             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3740         fi
3741         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3742         SLIB_INSTALL_LINKS=
3743         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3744         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3745         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3746         objformat="win32"
3747         ranlib=:
3748         enable dos_paths
3749         ;;
3750     win32|win64)
3751         disable symver
3752         if enabled shared; then
3753             # Link to the import library instead of the normal static library
3754             # for shared libs.
3755             LD_LIB='%.lib'
3756             # Cannot build both shared and static libs with MSVC or icl.
3757             disable static
3758         fi
3759         shlibdir_default="$bindir_default"
3760         SLIBPREF=""
3761         SLIBSUF=".dll"
3762         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3763         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3764         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3765         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3766         SLIB_INSTALL_LINKS=
3767         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3768         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3769         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3770         objformat="win32"
3771         ranlib=:
3772         enable dos_paths
3773         ;;
3774     cygwin*)
3775         target_os=cygwin
3776         shlibdir_default="$bindir_default"
3777         SLIBPREF="cyg"
3778         SLIBSUF=".dll"
3779         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3780         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3781         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3782         SLIB_INSTALL_LINKS=
3783         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3784         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3785         objformat="win32"
3786         enable dos_paths
3787         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3788         ;;
3789     *-dos|freedos|opendos)
3790         network_extralibs="-lsocket"
3791         objformat="coff"
3792         enable dos_paths
3793         add_cppflags -U__STRICT_ANSI__
3794         ;;
3795     linux)
3796         enable dv1394
3797         ;;
3798     irix*)
3799         target_os=irix
3800         ranlib="echo ignoring ranlib"
3801         ;;
3802     os/2*)
3803         strip="lxlite -CS"
3804         ln_s="cp -f"
3805         objformat="aout"
3806         add_cppflags -D_GNU_SOURCE
3807         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3808         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3809         LIBSUF="_s.a"
3810         SLIBPREF=""
3811         SLIBSUF=".dll"
3812         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3813         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3814         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3815             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3816             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3817             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3818             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3819             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3820         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3821             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3822         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3823         enable dos_paths
3824         enable_weak os2threads
3825         ;;
3826     gnu/kfreebsd)
3827         add_cppflags -D_BSD_SOURCE
3828         ;;
3829     gnu)
3830         ;;
3831     qnx)
3832         add_cppflags -D_QNX_SOURCE
3833         network_extralibs="-lsocket"
3834         ;;
3835     symbian)
3836         SLIBSUF=".dll"
3837         enable dos_paths
3838         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3839         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3840         add_ldflags -Wl,--target1-abs,--no-undefined \
3841                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3842                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3843         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3844                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3845                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3846         ;;
3847     osf1)
3848         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3849         ;;
3850     minix)
3851         ;;
3852     plan9)
3853         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3854                      -D_REENTRANT_SOURCE        \
3855                      -D_RESEARCH_SOURCE         \
3856                      -DFD_SETSIZE=96            \
3857                      -DHAVE_SOCK_OPTS
3858         add_compat strtod.o strtod=avpriv_strtod
3859         network_extralibs='-lbsd'
3860         exeobjs=compat/plan9/main.o
3861         disable ffserver
3862         cp_f='cp'
3863         ;;
3864     none)
3865         ;;
3866     *)
3867         die "Unknown OS '$target_os'."
3868         ;;
3869 esac
3870
3871 # determine libc flavour
3872
3873 probe_libc(){
3874     pfx=$1
3875     pfx_no_=${pfx%_}
3876     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3877     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3878         eval ${pfx}libc_type=uclibc
3879         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3880     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3881         eval ${pfx}libc_type=glibc
3882         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3883     # MinGW headers can be installed on Cygwin, so check for newlib first.
3884     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3885         eval ${pfx}libc_type=newlib
3886         add_${pfx}cppflags -U__STRICT_ANSI__
3887     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3888     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3889         eval ${pfx}libc_type=mingw64
3890         if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
3891             add_compat msvcrt/snprintf.o
3892             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
3893         fi
3894         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3895         eval test \$${pfx_no_}cc_type = "gcc" &&
3896             add_${pfx}cppflags -D__printf__=__gnu_printf__
3897     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3898          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3899         eval ${pfx}libc_type=mingw32
3900         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3901             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3902             die "ERROR: MinGW32 runtime version must be >= 3.15."
3903         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3904         eval test \$${pfx_no_}cc_type = "gcc" &&
3905             add_${pfx}cppflags -D__printf__=__gnu_printf__
3906     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3907         eval ${pfx}libc_type=msvcrt
3908         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3909         # 0x601 by default unless something else is set by the user.
3910         # This can easily lead to us detecting functions only present
3911         # in such new versions and producing binaries requiring windows 7.0.
3912         # Therefore explicitly set the default to XP unless the user has
3913         # set something else on the command line.
3914         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3915             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
3916     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3917         eval ${pfx}libc_type=klibc
3918     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3919         eval ${pfx}libc_type=bionic
3920     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3921         eval ${pfx}libc_type=solaris
3922         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3923     fi
3924 }
3925
3926 probe_libc
3927 test -n "$libc_type" && enable libc_$libc_type
3928 probe_libc host_
3929 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3930
3931 case $libc_type in
3932     bionic)
3933         add_compat strtod.o strtod=avpriv_strtod
3934         ;;
3935     msvcrt)
3936         add_compat strtod.o strtod=avpriv_strtod
3937         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3938                                      _snprintf=avpriv_snprintf  \
3939                                      vsnprintf=avpriv_vsnprintf
3940         ;;
3941 esac
3942
3943 # hacks for compiler/libc/os combinations
3944
3945 if enabled_all tms470 libc_glibc; then
3946     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3947     add_cppflags -D__USER_LABEL_PREFIX__=
3948     add_cppflags -D__builtin_memset=memset
3949     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3950     add_cflags   -pds=48    # incompatible redefinition of macro
3951 fi
3952
3953 if enabled_all ccc libc_glibc; then
3954     add_ldflags -Wl,-z,now  # calls to libots crash without this
3955 fi
3956
3957 esc(){
3958     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3959 }
3960
3961 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
3962
3963 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3964
3965 set_default $PATHS_LIST
3966 set_default nm
3967
3968 # we need to build at least one lib type
3969 if ! enabled_any static shared; then
3970     cat <<EOF
3971 At least one library type must be built.
3972 Specify --enable-static to build the static libraries or --enable-shared to
3973 build the shared libraries as well. To only build the shared libraries specify
3974 --disable-static in addition to --enable-shared.
3975 EOF
3976     exit 1;
3977 fi
3978
3979 # backward compatibility layer for incompatible_libav/fork_abi
3980 enabled incompatible_fork_abi  && enable incompatible_libav_abi
3981 enabled incompatible_libav_abi && enable incompatible_fork_abi
3982
3983 die_license_disabled() {
3984     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3985 }
3986
3987 die_license_disabled_gpl() {
3988     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
3989 }
3990
3991 die_license_disabled gpl frei0r
3992 die_license_disabled gpl libcdio
3993 die_license_disabled gpl libutvideo
3994 die_license_disabled gpl libvidstab
3995 die_license_disabled gpl libx264
3996 die_license_disabled gpl libxavs
3997 die_license_disabled gpl libxvid
3998 die_license_disabled gpl libzvbi
3999 die_license_disabled gpl x11grab
4000
4001 die_license_disabled nonfree libaacplus
4002 die_license_disabled nonfree libfaac
4003 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
4004 enabled gpl && die_license_disabled_gpl nonfree openssl
4005
4006 die_license_disabled version3 libopencore_amrnb
4007 die_license_disabled version3 libopencore_amrwb
4008 die_license_disabled version3 libvo_aacenc
4009 die_license_disabled version3 libvo_amrwbenc
4010
4011 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4012
4013 disabled optimizations || check_cflags -fomit-frame-pointer
4014
4015 enable_weak_pic() {
4016     disabled pic && return
4017     enable pic
4018     add_cppflags -DPIC
4019     case "$target_os" in
4020     mingw*|cygwin*)
4021         ;;
4022     *)
4023         add_cflags -fPIC
4024         ;;
4025     esac
4026     add_asflags  -fPIC
4027 }
4028
4029 enabled pic && enable_weak_pic
4030
4031 check_cc <<EOF || die "Symbol mangling check failed."
4032 int ff_extern;
4033 EOF
4034 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4035 extern_prefix=${sym%%ff_extern*}
4036
4037 check_cc <<EOF && enable_weak inline_asm
4038 void foo(void) { __asm__ volatile ("" ::); }
4039 EOF
4040
4041 _restrict=
4042 for restrict_keyword in restrict __restrict__ __restrict; do
4043     check_cc <<EOF && _restrict=$restrict_keyword && break
4044 void foo(char * $restrict_keyword p);
4045 EOF
4046 done
4047
4048 check_cc <<EOF && enable pragma_deprecated
4049 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4050 EOF
4051
4052 check_cc <<EOF && enable attribute_packed
4053 struct { int x; } __attribute__((packed)) x;
4054 EOF
4055
4056 check_cc <<EOF && enable attribute_may_alias
4057 union { int x; } __attribute__((may_alias)) x;
4058 EOF
4059
4060 check_cc <<EOF || die "endian test failed"
4061 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4062 EOF
4063 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4064
4065 check_inline_asm inline_asm_labels '"1:\n"'
4066
4067 if enabled aarch64; then
4068     # internal assembler in clang 3.3 does not support this instruction
4069     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4070     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4071
4072     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4073
4074 elif enabled alpha; then
4075
4076     check_cflags -mieee
4077
4078 elif enabled arm; then
4079
4080     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
4081 float func(float a, float b){ return a+b; }
4082 EOF
4083
4084     enabled thumb && check_cflags -mthumb || check_cflags -marm
4085     nogas=die
4086
4087     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4088         enable vfp_args
4089     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
4090         case "${cross_prefix:-$cc}" in
4091             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4092             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4093 __asm__ (".eabi_attribute 28, 1");
4094 int main(void) { return 0; }
4095 EOF
4096         esac
4097         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4098     fi
4099
4100     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4101     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4102     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4103     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4104     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4105     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4106
4107     [ $target_os = linux ] ||
4108         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4109             $ARCH_EXT_LIST_ARM
4110
4111     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4112     check_inline_asm asm_mod_y '"vmul.i32 d0, d0, %y0" :: "x"(0)'
4113
4114     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4115
4116 elif enabled mips; then
4117
4118     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4119     enabled mips32r2  && add_cflags "-mips32r2" && add_asflags "-mips32r2" &&
4120      check_inline_asm mips32r2  '"rotr $t0, $t1, 1"'
4121     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
4122      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
4123     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
4124      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
4125     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
4126      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
4127
4128 elif enabled parisc; then
4129
4130     if enabled gcc; then
4131         case $($cc -dumpversion) in
4132             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4133         esac
4134     fi
4135
4136 elif enabled ppc; then
4137
4138     enable local_aligned_8 local_aligned_16
4139
4140     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4141     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4142     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4143     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4144
4145     # AltiVec flags: The FSF version of GCC differs from the Apple version
4146     if enabled altivec; then
4147         if ! enabled_any pic ppc64; then
4148             nogas=warn
4149         fi
4150         check_cflags -maltivec -mabi=altivec &&
4151         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4152         check_cflags -faltivec
4153
4154         # check if our compiler supports Motorola AltiVec C API
4155         check_cc <<EOF || disable altivec
4156 $inc_altivec_h
4157 int main(void) {
4158     vector signed int v1 = (vector signed int) { 0 };
4159     vector signed int v2 = (vector signed int) { 1 };
4160     v1 = vec_add(v1, v2);
4161     return 0;
4162 }
4163 EOF
4164
4165         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4166     fi
4167
4168 elif enabled sparc; then
4169
4170     enabled vis && check_inline_asm vis '"pdist %f0, %f0, %f0"'
4171
4172 elif enabled x86; then
4173
4174     check_builtin rdtsc    intrin.h   "__rdtsc()"
4175     check_builtin mm_empty mmintrin.h "_mm_empty()"
4176
4177     enable local_aligned_8 local_aligned_16
4178
4179     # check whether EBP is available on x86
4180     # As 'i' is stored on the stack, this program will crash
4181     # if the base pointer is used to access it because the
4182     # base pointer is cleared in the inline assembly code.
4183     check_exec_crash <<EOF && enable ebp_available
4184 volatile int i=0;
4185 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4186 return i;
4187 EOF
4188
4189     # check whether EBX is available on x86
4190     check_inline_asm ebx_available '""::"b"(0)' &&
4191         check_inline_asm ebx_available '"":::"%ebx"'
4192
4193     # check whether xmm clobbers are supported
4194     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4195
4196     # check whether binutils is new enough to compile SSSE3/MMXEXT
4197     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4198     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4199
4200     if ! disabled_any asm mmx yasm; then
4201         if check_cmd $yasmexe --version; then
4202             enabled x86_64 && yasm_extra="-m amd64"
4203             yasm_debug="-g dwarf2"
4204         elif check_cmd nasm -v; then
4205             yasmexe=nasm
4206             yasm_debug="-g -F dwarf"
4207             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4208         fi
4209
4210         YASMFLAGS="-f $objformat $yasm_extra"
4211         enabled pic               && append YASMFLAGS "-DPIC"
4212         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4213         case "$objformat" in
4214             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4215         esac
4216
4217         check_yasm "movbe ecx, [5]" && enable yasm ||
4218             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4219         check_yasm "vextractf128 xmm0, ymm0, 0"      || disable avx_external avresample
4220         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4221         check_yasm "CPU amdnop" && enable cpunop
4222     fi
4223
4224     case "$cpu" in
4225         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4226             disable fast_clz
4227         ;;
4228     esac
4229
4230 fi
4231
4232 if enabled asm; then
4233     as=${gas:=$as}
4234     check_as <<EOF && enable gnu_as || \
4235         $nogas "GNU assembler not found, install gas-preprocessor"
4236 .macro m n
4237 \n: .int 0
4238 .endm
4239 m x
4240 EOF
4241 fi
4242
4243 check_ldflags -Wl,--as-needed
4244
4245 if check_func dlopen; then
4246     ldl=
4247 elif check_func dlopen -ldl; then
4248     ldl=-ldl
4249 fi
4250
4251 if ! disabled network; then
4252     check_type "sys/types.h sys/socket.h" socklen_t
4253     check_type netdb.h "struct addrinfo"
4254     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4255     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4256     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4257     check_type netinet/in.h "struct sockaddr_in6"
4258     check_type poll.h "struct pollfd"
4259     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4260     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4261     check_type netinet/sctp.h "struct sctp_event_subscribe"
4262     check_func getaddrinfo $network_extralibs
4263     check_func getservbyport $network_extralibs
4264     # Prefer arpa/inet.h over winsock2
4265     if check_header arpa/inet.h ; then
4266         check_func closesocket
4267     elif check_header winsock2.h ; then
4268         check_func_headers winsock2.h closesocket -lws2 &&
4269             network_extralibs="-lws2" ||
4270         { check_func_headers winsock2.h closesocket -lws2_32 &&
4271             network_extralibs="-lws2_32"; } || disable winsock2_h network
4272         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4273         check_type ws2tcpip.h socklen_t
4274         check_type ws2tcpip.h "struct addrinfo"
4275         check_type ws2tcpip.h "struct group_source_req"
4276         check_type ws2tcpip.h "struct ip_mreq_source"
4277         check_type ws2tcpip.h "struct ipv6_mreq"
4278         check_type winsock2.h "struct pollfd"
4279         check_type ws2tcpip.h "struct sockaddr_in6"
4280         check_type ws2tcpip.h "struct sockaddr_storage"
4281         check_struct winsock2.h "struct sockaddr" sa_len
4282     else
4283         disable network
4284     fi
4285 fi
4286
4287 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4288 check_func nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
4289
4290 check_func  access
4291 check_func  clock_gettime || { check_func clock_gettime -lrt && add_extralibs -lrt; }
4292 check_func  fcntl
4293 check_func  fork
4294 check_func_headers stdlib.h getenv
4295 check_func  gethrtime
4296 check_func  getopt
4297 check_func  getrusage
4298 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4299 check_func  gettimeofday
4300 check_func  inet_aton $network_extralibs
4301 check_func  isatty
4302 check_func  localtime_r
4303 check_func  ${malloc_prefix}memalign            && enable memalign
4304 check_func  mkstemp
4305 check_func  mmap
4306 check_func  mprotect
4307 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4308 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4309 check_func  setrlimit
4310 check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE
4311 check_func  strerror_r
4312 check_func  sched_getaffinity
4313 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4314 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4315 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4316 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4317 check_builtin sarestart signal.h "SA_RESTART"
4318 check_func  sysconf
4319 check_func  sysctl
4320 check_func  usleep
4321 check_func_headers conio.h kbhit
4322 check_func_headers windows.h PeekNamedPipe
4323 check_func_headers io.h setmode
4324 check_func_headers lzo/lzo1x.h lzo1x_999_compress
4325 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4326 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4327 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4328 check_func_headers windows.h GetProcessAffinityMask
4329 check_func_headers windows.h GetProcessTimes
4330 check_func_headers windows.h GetSystemTimeAsFileTime
4331 check_func_headers windows.h MapViewOfFile
4332 check_func_headers windows.h SetConsoleTextAttribute
4333 check_func_headers windows.h Sleep
4334 check_func_headers windows.h VirtualAlloc
4335 check_func_headers glob.h glob
4336 check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
4337
4338 check_header cl/cl.h
4339 check_header direct.h
4340 check_header dlfcn.h
4341 check_header dxva.h
4342 check_header dxva2api.h -D_WIN32_WINNT=0x0600
4343 check_header io.h
4344 check_header libcrystalhd/libcrystalhd_if.h
4345 check_header malloc.h
4346 check_header poll.h
4347 check_header sys/mman.h
4348 check_header sys/param.h
4349 check_header sys/resource.h
4350 check_header sys/select.h
4351 check_header sys/time.h
4352 check_header sys/un.h
4353 check_header termios.h
4354 check_header unistd.h
4355 check_header vdpau/vdpau.h
4356 check_header vdpau/vdpau_x11.h
4357 check_header VideoDecodeAcceleration/VDADecoder.h
4358 check_header windows.h
4359 check_header X11/extensions/XvMClib.h
4360 check_header asm/types.h
4361
4362 if ! disabled w32threads && ! enabled pthreads; then
4363     check_func_headers "windows.h process.h" _beginthreadex &&
4364         enable w32threads || disable w32threads
4365 fi
4366
4367 # check for some common methods of building with pthread support
4368 # do this before the optional library checks as some of them require pthreads
4369 if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
4370     enable pthreads
4371     if check_func pthread_join -pthread && check_func pthread_create -pthread; then
4372         add_cflags -pthread
4373         add_extralibs -pthread
4374     elif check_func pthread_join -pthreads && check_func pthread_create -pthreads; then
4375         add_cflags -pthreads
4376         add_extralibs -pthreads
4377     elif check_func pthread_join -lpthreadGC2 && check_func pthread_create -lpthreadGC2; then
4378         add_extralibs -lpthreadGC2
4379     elif check_lib pthread.h pthread_join -lpthread && check_lib pthread.h pthread_create -lpthread; then
4380         :
4381     elif ! check_func pthread_join && ! check_func pthread_create; then
4382         disable pthreads
4383     fi
4384     check_code cc "pthread.h" "static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER" || disable pthreads
4385 fi
4386
4387 for thread in $THREADS_LIST; do
4388     if enabled $thread; then
4389         test -n "$thread_type" &&
4390             die "ERROR: Only one thread type must be selected." ||
4391             thread_type="$thread"
4392     fi
4393 done
4394
4395 if enabled pthreads; then
4396   check_func pthread_cancel
4397 fi
4398
4399 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4400 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4401
4402 check_lib math.h sin -lm && LIBM="-lm"
4403 disabled crystalhd || check_lib libcrystalhd/libcrystalhd_if.h DtsCrystalHDVersion -lcrystalhd || disable crystalhd
4404
4405 atan2f_args=2
4406 ldexpf_args=2
4407 powf_args=2
4408
4409 for func in $MATH_FUNCS; do
4410     eval check_mathfunc $func \${${func}_args:-1}
4411 done
4412
4413 # these are off by default, so fail if requested and not available
4414 enabled avisynth          && { { check_lib2 "windows.h" LoadLibrary; } ||
4415                                { check_lib2 "dlfcn.h" dlopen -ldl; } ||
4416                                die "ERROR: LoadLibrary/dlopen not found for avisynth"; }
4417 enabled fontconfig        && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4418 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4419 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4420 enabled ladspa            && { check_header ladspa.h || die "ERROR: ladspa.h header not found"; }
4421 enabled libiec61883       && require libiec61883 libiec61883/iec61883.h iec61883_cmp_connect -lraw1394 -lavc1394 -lrom1394 -liec61883
4422 enabled libaacplus        && require "libaacplus >= 2.0.0" aacplus.h aacplusEncOpen -laacplus
4423 enabled libass            && require_pkg_config libass ass/ass.h ass_library_init
4424 enabled libbluray         && require libbluray libbluray/bluray.h bd_open -lbluray
4425 enabled libcelt           && require libcelt celt/celt.h celt_decode -lcelt0 &&
4426                              { check_lib celt/celt.h celt_decoder_create_custom -lcelt0 ||
4427                                die "ERROR: libcelt must be installed and version must be >= 0.11.0."; }
4428 enabled libcaca           && require_pkg_config caca caca.h caca_create_canvas
4429 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4430 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac &&
4431                              { check_cpp_condition fdk-aac/aacenc_lib.h "AACENCODER_LIB_VL0 >= 3 && AACENCODER_LIB_VL1 >= 4 && AACENCODER_LIB_VL2 >= 12" ||
4432                                die "ERROR: libfdk_aac must be installed and version must be >= 3.4.12."; }
4433 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"
4434 enabled libflite          && require2 libflite "flite/flite.h" flite_init $flite_libs
4435 enabled libfreetype       && require_libfreetype
4436 enabled libgme            && require  libgme gme/gme.h gme_new_emu -lgme -lstdc++
4437 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4438                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4439                                done || die "ERROR: libgsm not found"; }
4440 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4441 enabled libmodplug        && require libmodplug libmodplug/modplug.h ModPlug_Load -lmodplug
4442 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4443 enabled libnut            && require libnut libnut.h nut_demuxer_init -lnut
4444 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4445 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4446 enabled libopencv         && require_pkg_config opencv opencv/cxcore.h cvCreateImageHeader
4447 enabled libopenjpeg       && { check_lib openjpeg-1.5/openjpeg.h opj_version -lopenjpeg ||
4448                                check_lib openjpeg.h opj_version -lopenjpeg ||
4449                                die "ERROR: libopenjpeg not found"; }
4450 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4451 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4452 enabled libquvi           && require_pkg_config libquvi quvi/quvi.h quvi_init
4453 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4454 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4455 enabled libshine          && require_pkg_config shine shine/layer3.h shine_encode_buffer
4456 enabled libsoxr           && require libsoxr soxr.h soxr_create -lsoxr
4457 enabled libssh            && require_pkg_config libssh libssh/sftp.h sftp_init
4458 enabled libspeex          && require libspeex speex/speex.h speex_decoder_init -lspeex
4459 enabled libstagefright_h264 && require_cpp libstagefright_h264 "binder/ProcessState.h media/stagefright/MetaData.h
4460     media/stagefright/MediaBufferGroup.h media/stagefright/MediaDebug.h media/stagefright/MediaDefs.h
4461     media/stagefright/OMXClient.h media/stagefright/OMXCodec.h" android::OMXClient -lstagefright -lmedia -lutils -lbinder -lgnustl_static
4462 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4463 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame &&
4464                              { check_lib twolame.h twolame_encode_buffer_float32_interleaved -ltwolame ||
4465                                die "ERROR: libtwolame must be installed and version must be >= 0.3.10"; }
4466 enabled libutvideo        && require_cpp utvideo "stdint.h stdlib.h utvideo/utvideo.h utvideo/Codec.h" 'CCodec*' -lutvideo -lstdc++
4467 enabled libv4l2           && require_pkg_config libv4l2 libv4l2.h v4l2_ioctl
4468 enabled libvidstab        && require_pkg_config "vidstab >= 0.98" vid.stab/libvidstab.h vsMotionDetectInit
4469 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4470 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4471 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4472 enabled libvpx            && {
4473     enabled libvpx_vp8_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
4474                                     die "ERROR: libvpx decoder version must be >=0.9.1"; }
4475     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 ||
4476                                     die "ERROR: libvpx encoder version must be >=0.9.7"; }
4477     enabled libvpx_vp9_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx" -lvpx || disable libvpx_vp9_decoder; }
4478     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; } }
4479 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4480 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4481 enabled libx264           && require libx264 x264.h x264_encoder_encode -lx264 &&
4482                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4483                                die "ERROR: libx264 must be installed and version must be >= 0.118."; }
4484 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4485 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4486 enabled libzmq            && require_pkg_config libzmq zmq.h zmq_ctx_new
4487 enabled libzvbi           && require libzvbi libzvbi.h vbi_decoder_new -lzvbi
4488 enabled openal            && { { for al_libs in "${OPENAL_LIBS}" "-lopenal" "-lOpenAL32"; do
4489                                check_lib 'AL/al.h' alGetError "${al_libs}" && break; done } ||
4490                                die "ERROR: openal not found"; } &&
4491                              { check_cpp_condition "AL/al.h" "defined(AL_VERSION_1_1)" ||
4492                                die "ERROR: openal must be installed and version must be 1.1 or compatible"; }
4493 enabled opencl            && { check_lib2 OpenCL/cl.h clEnqueueNDRangeKernel -Wl,-framework,OpenCL ||
4494                                check_lib2 CL/cl.h clEnqueueNDRangeKernel -lOpenCL ||
4495                                die "ERROR: opencl not found"; } &&
4496                              { ! enabled_any w32threads os2threads ||
4497                                die "opencl currently needs --enable-pthreads or --disable-w32threads"; } &&
4498                              { check_cpp_condition "OpenCL/cl.h" "defined(CL_VERSION_1_2)" ||
4499                                check_cpp_condition "CL/cl.h" "defined(CL_VERSION_1_2)" ||
4500                                die "ERROR: opencl must be installed and version must be 1.2 or compatible"; }
4501 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4502                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4503                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4504                                die "ERROR: openssl not found"; }
4505
4506 if enabled gnutls; then
4507     { check_lib nettle/bignum.h nettle_mpz_get_str_256 -lnettle -lhogweed -lgmp && enable nettle; } ||
4508     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4509 fi
4510
4511 # libdc1394 check
4512 if enabled libdc1394; then
4513     { check_lib dc1394/dc1394.h dc1394_new -ldc1394 -lraw1394 &&
4514         enable libdc1394_2; } ||
4515     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4516         enable libdc1394_1; } ||
4517     die "ERROR: No version of libdc1394 found "
4518 fi
4519
4520 SDL_CONFIG="${cross_prefix}sdl-config"
4521 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4522     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4523     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4524     enable sdl
4525 else
4526   if "${SDL_CONFIG}" --version > /dev/null 2>&1; then
4527     sdl_cflags=$("${SDL_CONFIG}" --cflags)
4528     sdl_libs=$("${SDL_CONFIG}" --libs)
4529     check_func_headers SDL_version.h SDL_Linked_Version $sdl_cflags $sdl_libs &&
4530     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4531     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4532     enable sdl
4533   fi
4534 fi
4535 enabled sdl && add_cflags $sdl_cflags && add_extralibs $sdl_libs
4536
4537 texi2html --help 2> /dev/null | grep -q 'init-file' && enable texi2html || disable texi2html
4538 makeinfo --version > /dev/null 2>&1 && enable makeinfo  || disable makeinfo
4539 perl -v            > /dev/null 2>&1 && enable perl      || disable perl
4540 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4541 rsync --help 2> /dev/null | grep -q 'contimeout' && enable rsync_contimeout || disable rsync_contimeout
4542
4543 check_header linux/fb.h
4544 check_header linux/videodev.h
4545 check_header linux/videodev2.h
4546 check_code cc linux/videodev2.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_safe struct_v4l2_frmivalenum_discrete
4547
4548 check_header sys/videoio.h
4549
4550 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4551 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4552 # w32api 3.12 had it defined wrong
4553 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4554
4555 check_type "dshow.h" IBaseFilter
4556
4557 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4558 { check_header dev/bktr/ioctl_meteor.h &&
4559   check_header dev/bktr/ioctl_bt848.h; } ||
4560 { check_header machine/ioctl_meteor.h &&
4561   check_header machine/ioctl_bt848.h; } ||
4562 { check_header dev/video/meteor/ioctl_meteor.h &&
4563   check_header dev/video/bktr/ioctl_bt848.h; } ||
4564 check_header dev/ic/bt8xx.h
4565
4566 check_header sndio.h
4567 if check_struct sys/soundcard.h audio_buf_info bytes; then
4568     enable_safe sys/soundcard.h
4569 else
4570     check_cc -D__BSD_VISIBLE -D__XSI_VISIBLE <<EOF && add_cppflags -D__BSD_VISIBLE -D__XSI_VISIBLE && enable_safe sys/soundcard.h
4571     #include <sys/soundcard.h>
4572     audio_buf_info abc;
4573 EOF
4574 fi
4575 check_header soundcard.h
4576
4577 enabled_any alsa_indev alsa_outdev &&
4578     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4579
4580 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack && check_func sem_timedwait &&
4581     check_func jack_port_get_latency_range -ljack
4582
4583 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4584
4585 if enabled libcdio; then
4586     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4587     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4588     die "ERROR: libcdio-paranoia not found"
4589 fi
4590
4591 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4592
4593 enabled x11grab                                           &&
4594 require Xext X11/extensions/XShm.h XShmCreateImage -lXext &&
4595 require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes &&
4596 { enabled xlib || die "ERROR: Xlib not found"; }
4597
4598 enabled vaapi &&
4599     check_lib va/va.h vaInitialize -lva ||
4600     disable vaapi
4601
4602 enabled vdpau &&
4603     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4604     disable vdpau
4605
4606 enabled vdpau && enabled xlib &&
4607     check_lib2 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4608     enable vdpau_x11
4609
4610 # Funny iconv installations are not unusual, so check it after all flags have been set
4611 disabled iconv || check_func_headers iconv.h iconv || check_lib2 iconv.h iconv -liconv || disable iconv
4612
4613 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4614
4615 # add some useful compiler flags if supported
4616 check_cflags -Wdeclaration-after-statement
4617 check_cflags -Wall
4618 check_cflags -Wdisabled-optimization
4619 check_cflags -Wpointer-arith
4620 check_cflags -Wredundant-decls
4621 check_cflags -Wwrite-strings
4622 check_cflags -Wtype-limits
4623 check_cflags -Wundef
4624 check_cflags -Wmissing-prototypes
4625 check_cflags -Wno-pointer-to-int-cast
4626 check_cflags -Wstrict-prototypes
4627 enabled extra_warnings && check_cflags -Winline
4628
4629 check_disable_warning(){
4630     warning_flag=-W${1#-Wno-}
4631     test_cflags $warning_flag && add_cflags $1
4632 }
4633
4634 check_disable_warning -Wno-parentheses
4635 check_disable_warning -Wno-switch
4636 check_disable_warning -Wno-format-zero-length
4637 check_disable_warning -Wno-pointer-sign
4638
4639 # add some linker flags
4640 check_ldflags -Wl,--warn-common
4641 check_ldflags -Wl,-rpath-link=libpostproc:libswresample:libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4642 enabled rpath && add_ldflags -Wl,-rpath=$libdir
4643 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4644
4645 # add some strip flags
4646 # -wN '..@*' is more selective than -x, but not available everywhere.
4647 check_stripflags -wN \'..@*\' || check_stripflags -x
4648
4649 enabled neon_clobber_test &&
4650     check_ldflags -Wl,--wrap,avcodec_open2              \
4651                   -Wl,--wrap,avcodec_decode_audio4      \
4652                   -Wl,--wrap,avcodec_decode_video2      \
4653                   -Wl,--wrap,avcodec_decode_subtitle2   \
4654                   -Wl,--wrap,avcodec_encode_audio2      \
4655                   -Wl,--wrap,avcodec_encode_video2      \
4656                   -Wl,--wrap,avcodec_encode_subtitle    \
4657                   -Wl,--wrap,swr_convert                \
4658                   -Wl,--wrap,avresample_convert ||
4659     disable neon_clobber_test
4660
4661 enabled xmm_clobber_test &&
4662     check_ldflags -Wl,--wrap,avcodec_open2              \
4663                   -Wl,--wrap,avcodec_decode_audio4      \
4664                   -Wl,--wrap,avcodec_decode_video2      \
4665                   -Wl,--wrap,avcodec_decode_subtitle2   \
4666                   -Wl,--wrap,avcodec_encode_audio2      \
4667                   -Wl,--wrap,avcodec_encode_video       \
4668                   -Wl,--wrap,avcodec_encode_video2      \
4669                   -Wl,--wrap,avcodec_encode_subtitle    \
4670                   -Wl,--wrap,swr_convert                \
4671                   -Wl,--wrap,avresample_convert         \
4672                   -Wl,--wrap,sws_scale ||
4673     disable xmm_clobber_test
4674
4675 echo "X{};" > $TMPV
4676 if test_ldflags -Wl,--version-script,$TMPV; then
4677     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4678     check_cc <<EOF && enable symver_asm_label
4679 void ff_foo(void) __asm__ ("av_foo@VERSION");
4680 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4681 EOF
4682     check_cc <<EOF && enable symver_gnu_asm
4683 __asm__(".symver ff_foo,av_foo@VERSION");
4684 void ff_foo(void) {}
4685 EOF
4686 fi
4687
4688 if [ -z "$optflags" ]; then
4689     if enabled small; then
4690         optflags=$cflags_size
4691     elif enabled optimizations; then
4692         optflags=$cflags_speed
4693     else
4694         optflags=$cflags_noopt
4695     fi
4696 fi
4697
4698 check_optflags(){
4699     check_cflags "$@"
4700     enabled lto && check_ldflags "$@"
4701 }
4702
4703
4704 if enabled lto; then
4705     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4706     check_cflags  -flto
4707     check_ldflags -flto $cpuflags
4708 fi
4709
4710 check_optflags $optflags
4711 check_optflags -fno-math-errno
4712 check_optflags -fno-signed-zeros
4713
4714 enabled ftrapv && check_cflags -ftrapv
4715
4716 check_cc -mno-red-zone <<EOF && noredzone_flags="-mno-red-zone"
4717 int x;
4718 EOF
4719
4720
4721 if enabled icc; then
4722     # Just warnings, no remarks
4723     check_cflags -w1
4724     # -wd: Disable following warnings
4725     # 144, 167, 556: -Wno-pointer-sign
4726     # 188: enumerated type mixed with another type
4727     # 1292: attribute "foo" ignored
4728     # 1419: external declaration in primary source file
4729     # 10006: ignoring unknown option -fno-signed-zeros
4730     # 10148: ignoring unknown option -Wno-parentheses
4731     # 10156: ignoring option '-W'; no argument required
4732     check_cflags -wd144,167,188,556,1292,1419,10006,10148,10156
4733     # 11030: Warning unknown option --as-needed
4734     # 10156: ignoring option '-export'; no argument required
4735     check_ldflags -wd10156,11030
4736     # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
4737     enable ebp_available
4738     if enabled x86_32; then
4739         icc_version=$($cc -dumpversion)
4740         test ${icc_version%%.*} -ge 11 &&
4741             check_cflags -falign-stack=maintain-16-byte ||
4742             disable aligned_stack
4743     fi
4744 elif enabled ccc; then
4745     # disable some annoying warnings
4746     add_cflags -msg_disable bitnotint
4747     add_cflags -msg_disable mixfuncvoid
4748     add_cflags -msg_disable nonstandcast
4749     add_cflags -msg_disable unsupieee
4750 elif enabled gcc; then
4751     check_optflags -fno-tree-vectorize
4752     check_cflags -Werror=implicit-function-declaration
4753     check_cflags -Werror=missing-prototypes
4754     check_cflags -Werror=return-type
4755     check_cflags -Werror=vla
4756     enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
4757 elif enabled llvm_gcc; then
4758  &nb