configure: add version check for pkg libraries, and use it for vidstab
[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     resampling_audio_example
1250     scaling_video_example
1251     transcode_aac_example
1252 "
1253
1254 EXTERNAL_LIBRARY_LIST="
1255     avisynth
1256     bzlib
1257     crystalhd
1258     fontconfig
1259     frei0r
1260     gnutls
1261     iconv
1262     ladspa
1263     libaacplus
1264     libass
1265     libbluray
1266     libcaca
1267     libcdio
1268     libcelt
1269     libdc1394
1270     libfaac
1271     libfdk_aac
1272     libflite
1273     libfreetype
1274     libgme
1275     libgsm
1276     libiec61883
1277     libilbc
1278     libmodplug
1279     libmp3lame
1280     libnut
1281     libopencore_amrnb
1282     libopencore_amrwb
1283     libopencv
1284     libopenjpeg
1285     libopus
1286     libpulse
1287     libquvi
1288     librtmp
1289     libschroedinger
1290     libshine
1291     libsoxr
1292     libspeex
1293     libssh
1294     libstagefright_h264
1295     libtheora
1296     libtwolame
1297     libutvideo
1298     libv4l2
1299     libvidstab
1300     libvo_aacenc
1301     libvo_amrwbenc
1302     libvorbis
1303     libvpx
1304     libwavpack
1305     libwebp
1306     libx264
1307     libxavs
1308     libxvid
1309     libzmq
1310     libzvbi
1311     openal
1312     opencl
1313     openssl
1314     x11grab
1315     zlib
1316 "
1317
1318 DOCUMENT_LIST="
1319     doc
1320     htmlpages
1321     manpages
1322     podpages
1323     txtpages
1324 "
1325
1326 HWACCEL_LIST="
1327     dxva2
1328     vaapi
1329     vda
1330     vdpau
1331     xvmc
1332 "
1333
1334 LIBRARY_LIST="
1335     avcodec
1336     avdevice
1337     avfilter
1338     avformat
1339     avresample
1340     avutil
1341     postproc
1342     swresample
1343     swscale
1344 "
1345
1346 PROGRAM_LIST="
1347     ffplay
1348     ffprobe
1349     ffserver
1350     ffmpeg
1351 "
1352
1353 CONFIG_LIST="
1354     $COMPONENT_LIST
1355     $DOCUMENT_LIST
1356     $EXAMPLE_LIST
1357     $EXTERNAL_LIBRARY_LIST
1358     $HWACCEL_LIST
1359     $LIBRARY_LIST
1360     $PROGRAM_LIST
1361     dct
1362     dwt
1363     error_resilience
1364     fast_unaligned
1365     fft
1366     ftrapv
1367     gpl
1368     gray
1369     hardcoded_tables
1370     incompatible_libav_abi
1371     incompatible_fork_abi
1372     lsp
1373     lzo
1374     mdct
1375     memalign_hack
1376     memory_poisoning
1377     neon_clobber_test
1378     network
1379     nonfree
1380     pic
1381     raise_major
1382     rdft
1383     runtime_cpudetect
1384     safe_bitstream_reader
1385     shared
1386     small
1387     sram
1388     static
1389     swscale_alpha
1390     thumb
1391     version3
1392     xmm_clobber_test
1393 "
1394
1395 THREADS_LIST='
1396     pthreads
1397     w32threads
1398     os2threads
1399 '
1400
1401 ATOMICS_LIST='
1402     atomics_gcc
1403     atomics_suncc
1404     atomics_win32
1405 '
1406
1407 ARCH_LIST='
1408     aarch64
1409     alpha
1410     arm
1411     avr32
1412     avr32_ap
1413     avr32_uc
1414     bfin
1415     ia64
1416     m68k
1417     mips
1418     mips64
1419     parisc
1420     ppc
1421     ppc64
1422     s390
1423     sh4
1424     sparc
1425     sparc64
1426     tilegx
1427     tilepro
1428     tomi
1429     x86
1430     x86_32
1431     x86_64
1432 '
1433
1434 ARCH_EXT_LIST_ARM='
1435     armv5te
1436     armv6
1437     armv6t2
1438     neon
1439     vfp
1440     vfpv3
1441 '
1442
1443 ARCH_EXT_LIST_X86='
1444     amd3dnow
1445     amd3dnowext
1446     avx
1447     avx2
1448     fma4
1449     i686
1450     mmx
1451     mmxext
1452     sse
1453     sse2
1454     sse3
1455     sse4
1456     sse42
1457     ssse3
1458 '
1459
1460 ARCH_EXT_LIST="
1461     $ARCH_EXT_LIST_ARM
1462     $ARCH_EXT_LIST_X86
1463     altivec
1464     ppc4xx
1465     vis
1466     mipsfpu
1467     mips32r2
1468     mipsdspr1
1469     mipsdspr2
1470 "
1471
1472 HAVE_LIST_CMDLINE='
1473     inline_asm
1474     symver
1475     yasm
1476 '
1477
1478 HAVE_LIST_PUB='
1479     bigendian
1480     fast_unaligned
1481     incompatible_libav_abi
1482     incompatible_fork_abi
1483 '
1484
1485 MATH_FUNCS="
1486     atanf
1487     atan2f
1488     cbrt
1489     cbrtf
1490     cosf
1491     exp2
1492     exp2f
1493     expf
1494     isinf
1495     isnan
1496     ldexpf
1497     llrint
1498     llrintf
1499     log2
1500     log2f
1501     log10f
1502     lrint
1503     lrintf
1504     powf
1505     rint
1506     round
1507     roundf
1508     sinf
1509     trunc
1510     truncf
1511 "
1512
1513 HAVE_LIST="
1514     $ARCH_EXT_LIST
1515     $(add_suffix _external $ARCH_EXT_LIST)
1516     $(add_suffix _inline   $ARCH_EXT_LIST)
1517     $HAVE_LIST_CMDLINE
1518     $HAVE_LIST_PUB
1519     $THREADS_LIST
1520     $ATOMICS_LIST
1521     $MATH_FUNCS
1522     access
1523     aligned_malloc
1524     aligned_stack
1525     alsa_asoundlib_h
1526     altivec_h
1527     arpa_inet_h
1528     asm_mod_q
1529     asm_mod_y
1530     asm_types_h
1531     atomic_cas_ptr
1532     atomics_native
1533     attribute_may_alias
1534     attribute_packed
1535     cdio_paranoia_h
1536     cdio_paranoia_paranoia_h
1537     CL_cl_h
1538     clock_gettime
1539     closesocket
1540     CommandLineToArgvW
1541     cpunop
1542     CryptGenRandom
1543     dcbzl
1544     dev_bktr_ioctl_bt848_h
1545     dev_bktr_ioctl_meteor_h
1546     dev_ic_bt8xx_h
1547     dev_video_bktr_ioctl_bt848_h
1548     dev_video_meteor_ioctl_meteor_h
1549     direct_h
1550     dlfcn_h
1551     dlopen
1552     dos_paths
1553     dxva_h
1554     ebp_available
1555     ebx_available
1556     fast_64bit
1557     fast_clz
1558     fast_cmov
1559     fcntl
1560     fork
1561     getaddrinfo
1562     gethrtime
1563     getopt
1564     GetProcessAffinityMask
1565     GetProcessMemoryInfo
1566     GetProcessTimes
1567     GetSystemTimeAsFileTime
1568     getrusage
1569     getservbyport
1570     gettimeofday
1571     glob
1572     gnu_as
1573     gnu_windres
1574     gsm_h
1575     ibm_asm
1576     inet_aton
1577     io_h
1578     inline_asm_labels
1579     isatty
1580     jack_port_get_latency_range
1581     kbhit
1582     ldbrx
1583     libc_msvcrt
1584     libdc1394_1
1585     libdc1394_2
1586     local_aligned_16
1587     local_aligned_8
1588     localtime_r
1589     loongson
1590     lzo1x_999_compress
1591     machine_ioctl_bt848_h
1592     machine_ioctl_meteor_h
1593     machine_rw_barrier
1594     makeinfo
1595     malloc_h
1596     MapViewOfFile
1597     memalign
1598     MemoryBarrier
1599     mkstemp
1600     mm_empty
1601     mmap
1602     mprotect
1603     nanosleep
1604     openjpeg_1_5_openjpeg_h
1605     PeekNamedPipe
1606     perl
1607     pod2man
1608     poll_h
1609     posix_memalign
1610     pragma_deprecated
1611     pthread_cancel
1612     rdtsc
1613     rsync_contimeout
1614     sarestart
1615     sched_getaffinity
1616     sdl
1617     SetConsoleTextAttribute
1618     setmode
1619     setrlimit
1620     Sleep
1621     sndio_h
1622     socklen_t
1623     soundcard_h
1624     strerror_r
1625     struct_addrinfo
1626     struct_group_source_req
1627     struct_ip_mreq_source
1628     struct_ipv6_mreq
1629     struct_pollfd
1630     struct_rusage_ru_maxrss
1631     struct_sctp_event_subscribe
1632     struct_sockaddr_in6
1633     struct_sockaddr_sa_len
1634     struct_sockaddr_storage
1635     struct_stat_st_mtim_tv_nsec
1636     struct_v4l2_frmivalenum_discrete
1637     symver_asm_label
1638     symver_gnu_asm
1639     sync_val_compare_and_swap
1640     sysconf
1641     sysctl
1642     sys_mman_h
1643     sys_param_h
1644     sys_resource_h
1645     sys_select_h
1646     sys_soundcard_h
1647     sys_time_h
1648     sys_un_h
1649     sys_videoio_h
1650     termios_h
1651     texi2html
1652     threads
1653     unistd_h
1654     usleep
1655     vdpau_x11
1656     vfp_args
1657     VirtualAlloc
1658     windows_h
1659     winsock2_h
1660     xform_asm
1661     xlib
1662     xmm_clobbers
1663 "
1664
1665 # options emitted with CONFIG_ prefix but not available on the command line
1666 CONFIG_EXTRA="
1667     aandcttables
1668     ac3dsp
1669     audio_frame_queue
1670     dsputil
1671     exif
1672     frame_thread_encoder
1673     gcrypt
1674     golomb
1675     gplv3
1676     h263dsp
1677     h264chroma
1678     h264dsp
1679     h264pred
1680     h264qpel
1681     hpeldsp
1682     huffman
1683     intrax8
1684     lgplv3
1685     lpc
1686     mpegaudio
1687     mpegaudiodsp
1688     mpegvideo
1689     mpegvideoenc
1690     nettle
1691     rangecoder
1692     riffdec
1693     riffenc
1694     rtpdec
1695     rtpenc_chain
1696     sinewin
1697     videodsp
1698     vp3dsp
1699 "
1700
1701 CMDLINE_SELECT="
1702     $ARCH_EXT_LIST
1703     $CONFIG_LIST
1704     $HAVE_LIST_CMDLINE
1705     $THREADS_LIST
1706     asm
1707     cross_compile
1708     debug
1709     extra_warnings
1710     logging
1711     lto
1712     optimizations
1713     rpath
1714     stripping
1715 "
1716
1717 PATHS_LIST='
1718     bindir
1719     datadir
1720     docdir
1721     incdir
1722     libdir
1723     mandir
1724     prefix
1725     shlibdir
1726 '
1727
1728 CMDLINE_SET="
1729     $PATHS_LIST
1730     ar
1731     arch
1732     as
1733     assert_level
1734     build_suffix
1735     cc
1736     cpu
1737     cross_prefix
1738     cxx
1739     dep_cc
1740     extra_version
1741     host_cc
1742     host_cflags
1743     host_ld
1744     host_ldflags
1745     host_libs
1746     host_os
1747     install
1748     ld
1749     logfile
1750     malloc_prefix
1751     nm
1752     optflags
1753     pkg_config
1754     progs_suffix
1755     random_seed
1756     samples
1757     strip
1758     sysinclude
1759     sysroot
1760     target_exec
1761     target_os
1762     target_path
1763     target_samples
1764     tempprefix
1765     toolchain
1766     valgrind
1767     yasmexe
1768 "
1769
1770 CMDLINE_APPEND="
1771     extra_cflags
1772     extra_cxxflags
1773     host_cppflags
1774 "
1775
1776 # code dependency declarations
1777
1778 # architecture extensions
1779
1780 armv5te_deps="arm"
1781 armv6_deps="arm"
1782 armv6t2_deps="arm"
1783 neon_deps_any="aarch64 arm"
1784 vfp_deps_any="aarch64 arm"
1785 vfpv3_deps="vfp"
1786
1787 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1788
1789 mipsfpu_deps="mips"
1790 mips32r2_deps="mips"
1791 mipsdspr1_deps="mips"
1792 mipsdspr2_deps="mips"
1793
1794 altivec_deps="ppc"
1795 ppc4xx_deps="ppc"
1796
1797 vis_deps="sparc"
1798
1799 cpunop_deps="i686"
1800 x86_64_select="i686"
1801 x86_64_suggest="fast_cmov"
1802
1803 amd3dnow_deps="mmx"
1804 amd3dnowext_deps="amd3dnow"
1805 mmx_deps="x86"
1806 mmxext_deps="mmx"
1807 sse_deps="mmxext"
1808 sse2_deps="sse"
1809 sse3_deps="sse2"
1810 ssse3_deps="sse3"
1811 sse4_deps="ssse3"
1812 sse42_deps="sse4"
1813 avx_deps="sse42"
1814 fma4_deps="avx"
1815 avx2_deps="avx"
1816
1817 mmx_external_deps="yasm"
1818 mmx_inline_deps="inline_asm"
1819 mmx_suggest="mmx_external mmx_inline"
1820
1821 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86); do
1822     eval dep=\$${ext}_deps
1823     eval ${ext}_external_deps='"${dep}_external"'
1824     eval ${ext}_inline_deps='"${dep}_inline"'
1825     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1826 done
1827
1828 aligned_stack_if_any="aarch64 ppc x86"
1829 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1830 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1831 fast_unaligned_if_any="aarch64 ppc x86"
1832
1833 need_memalign="altivec neon sse"
1834
1835 # system capabilities
1836 log2_deps="!libc_msvcrt"
1837
1838 symver_if_any="symver_asm_label symver_gnu_asm"
1839
1840 # threading support
1841 atomics_gcc_if="sync_val_compare_and_swap"
1842 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1843 atomics_win32_if="MemoryBarrier"
1844 atomics_native_if_any="$ATOMICS_LIST"
1845 threads_if_any="$THREADS_LIST"
1846
1847 # subsystems
1848 dct_select="rdft"
1849 error_resilience_select="dsputil"
1850 frame_thread_encoder_deps="encoders threads"
1851 lpc_select="dsputil"
1852 mdct_select="fft"
1853 rdft_select="fft"
1854 mpegaudio_select="mpegaudiodsp"
1855 mpegaudiodsp_select="dct"
1856 mpegvideo_select="dsputil h264chroma hpeldsp videodsp"
1857 mpegvideoenc_select="mpegvideo"
1858
1859 # decoders / encoders
1860 aac_decoder_select="mdct sinewin"
1861 aac_encoder_select="audio_frame_queue mdct sinewin"
1862 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1863 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1864 ac3_encoder_select="mdct ac3dsp dsputil"
1865 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1866 aic_decoder_select="dsputil golomb"
1867 alac_encoder_select="lpc"
1868 als_decoder_select="dsputil"
1869 amrnb_decoder_select="lsp"
1870 amrwb_decoder_select="lsp"
1871 amv_decoder_select="dsputil hpeldsp exif"
1872 amv_encoder_select="aandcttables"
1873 ape_decoder_select="dsputil"
1874 asv1_decoder_select="dsputil"
1875 asv1_encoder_select="dsputil"
1876 asv2_decoder_select="dsputil"
1877 asv2_encoder_select="dsputil"
1878 atrac1_decoder_select="mdct sinewin"
1879 atrac3_decoder_select="mdct"
1880 atrac3p_decoder_select="mdct sinewin"
1881 avrn_decoder_select="exif"
1882 bink_decoder_select="dsputil hpeldsp"
1883 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
1884 binkaudio_rdft_decoder_select="mdct rdft sinewin"
1885 cavs_decoder_select="dsputil golomb h264chroma videodsp"
1886 cllc_decoder_select="dsputil"
1887 comfortnoise_encoder_select="lpc"
1888 cook_decoder_select="dsputil mdct sinewin"
1889 cscd_decoder_select="lzo"
1890 cscd_decoder_suggest="zlib"
1891 dca_decoder_select="mdct"
1892 dirac_decoder_select="dsputil dwt golomb videodsp"
1893 dnxhd_decoder_select="dsputil"
1894 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
1895 dvvideo_decoder_select="dsputil"
1896 dvvideo_encoder_select="dsputil"
1897 dxa_decoder_select="zlib"
1898 eac3_decoder_select="ac3_decoder"
1899 eac3_encoder_select="ac3_encoder"
1900 eamad_decoder_select="aandcttables dsputil mpegvideo"
1901 eatgq_decoder_select="aandcttables"
1902 eatqi_decoder_select="aandcttables error_resilience mpegvideo"
1903 exr_decoder_select="zlib"
1904 ffv1_decoder_select="dsputil golomb rangecoder"
1905 ffv1_encoder_select="dsputil rangecoder"
1906 ffvhuff_decoder_select="dsputil"
1907 ffvhuff_encoder_select="dsputil huffman"
1908 flac_decoder_select="golomb"
1909 flac_encoder_select="dsputil golomb lpc"
1910 flashsv_decoder_select="zlib"
1911 flashsv_encoder_select="zlib"
1912 flashsv2_encoder_select="zlib"
1913 flashsv2_decoder_select="zlib"
1914 flv_decoder_select="h263_decoder"
1915 flv_encoder_select="h263_encoder"
1916 fourxm_decoder_select="dsputil"
1917 fraps_decoder_select="dsputil huffman"
1918 g2m_decoder_select="dsputil zlib"
1919 g729_decoder_select="dsputil"
1920 h261_decoder_select="error_resilience mpegvideo"
1921 h261_encoder_select="aandcttables mpegvideoenc"
1922 h263_decoder_select="error_resilience h263_parser h263dsp mpegvideo"
1923 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1924 h263i_decoder_select="h263_decoder"
1925 h263p_encoder_select="h263_encoder"
1926 h264_decoder_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1927 h264_decoder_suggest="error_resilience"
1928 hevc_decoder_select="dsputil golomb videodsp"
1929 huffyuv_decoder_select="dsputil"
1930 huffyuv_encoder_select="dsputil huffman"
1931 iac_decoder_select="dsputil fft mdct sinewin"
1932 imc_decoder_select="dsputil fft mdct sinewin"
1933 indeo3_decoder_select="hpeldsp"
1934 interplay_video_decoder_select="hpeldsp"
1935 jpegls_decoder_select="dsputil golomb hpeldsp exif"
1936 jpegls_encoder_select="golomb"
1937 jv_decoder_select="dsputil"
1938 lagarith_decoder_select="dsputil"
1939 ljpeg_encoder_select="aandcttables mpegvideoenc"
1940 loco_decoder_select="golomb"
1941 mdec_decoder_select="dsputil error_resilience mpegvideo"
1942 metasound_decoder_select="lsp mdct sinewin"
1943 mimic_decoder_select="dsputil hpeldsp"
1944 mjpeg_decoder_select="dsputil hpeldsp exif"
1945 mjpegb_decoder_select="dsputil hpeldsp exif"
1946 mjpeg_encoder_select="aandcttables dsputil mpegvideoenc"
1947 mlp_decoder_select="dsputil mlp_parser"
1948 motionpixels_decoder_select="dsputil"
1949 mp1_decoder_select="mpegaudio"
1950 mp1float_decoder_select="mpegaudio"
1951 mp2_decoder_select="mpegaudio"
1952 mp2float_decoder_select="mpegaudio"
1953 mp3_decoder_select="mpegaudio"
1954 mp3adu_decoder_select="mpegaudio"
1955 mp3adufloat_decoder_select="mpegaudio"
1956 mp3float_decoder_select="mpegaudio"
1957 mp3on4_decoder_select="mpegaudio"
1958 mp3on4float_decoder_select="mpegaudio"
1959 mpc7_decoder_select="dsputil mpegaudiodsp"
1960 mpc8_decoder_select="dsputil mpegaudiodsp"
1961 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1962 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1963 mpeg1video_decoder_select="error_resilience mpegvideo"
1964 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1965 mpeg2video_decoder_select="error_resilience mpegvideo"
1966 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1967 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1968 mpeg4_encoder_select="h263_encoder"
1969 msmpeg4v1_decoder_select="h263_decoder"
1970 msmpeg4v2_decoder_select="h263_decoder"
1971 msmpeg4v2_encoder_select="h263_encoder"
1972 msmpeg4v3_decoder_select="h263_decoder"
1973 msmpeg4v3_encoder_select="h263_encoder"
1974 mss2_decoder_select="error_resilience vc1_decoder"
1975 mxpeg_decoder_select="dsputil hpeldsp exif"
1976 nellymoser_decoder_select="mdct sinewin"
1977 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1978 nuv_decoder_select="dsputil lzo"
1979 png_decoder_select="zlib"
1980 png_encoder_select="dsputil zlib"
1981 prores_decoder_select="dsputil"
1982 prores_encoder_select="dsputil"
1983 qcelp_decoder_select="lsp"
1984 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1985 ra_144_encoder_select="audio_frame_queue lpc"
1986 ralf_decoder_select="golomb"
1987 rtjpeg_decoder_select="dsputil"
1988 rv10_decoder_select="error_resilience h263_decoder h263dsp"
1989 rv10_encoder_select="h263_encoder"
1990 rv20_decoder_select="error_resilience h263_decoder h263dsp"
1991 rv20_encoder_select="h263_encoder"
1992 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1993 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1994 shorten_decoder_select="golomb"
1995 sipr_decoder_select="lsp"
1996 snow_decoder_select="dsputil dwt h264qpel hpeldsp rangecoder"
1997 snow_encoder_select="aandcttables dsputil dwt h264qpel hpeldsp mpegvideoenc rangecoder"
1998 sonic_decoder_select="golomb"
1999 sonic_encoder_select="golomb"
2000 sonic_ls_encoder_select="golomb"
2001 sp5x_decoder_select="dsputil hpeldsp exif"
2002 svq1_decoder_select="hpeldsp"
2003 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
2004 svq3_decoder_select="golomb h264chroma h264dsp h264pred h264qpel hpeldsp mpegvideo videodsp"
2005 svq3_decoder_suggest="error_resilience zlib"
2006 tak_decoder_select="dsputil"
2007 theora_decoder_select="vp3_decoder"
2008 tiff_decoder_suggest="zlib"
2009 tiff_encoder_suggest="zlib"
2010 thp_decoder_select="dsputil hpeldsp exif"
2011 truehd_decoder_select="mlp_parser"
2012 truemotion2_decoder_select="dsputil"
2013 truespeech_decoder_select="dsputil"
2014 tscc_decoder_select="zlib"
2015 twinvq_decoder_select="mdct lsp sinewin"
2016 utvideo_decoder_select="dsputil"
2017 utvideo_encoder_select="dsputil huffman"
2018 vble_decoder_select="dsputil"
2019 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel intrax8"
2020 vc1image_decoder_select="vc1_decoder"
2021 vorbis_decoder_select="mdct"
2022 vorbis_encoder_select="mdct"
2023 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2024 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
2025 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
2026 vp6a_decoder_select="vp6_decoder"
2027 vp6f_decoder_select="vp6_decoder"
2028 vp8_decoder_select="h264pred videodsp"
2029 vp9_decoder_select="videodsp"
2030 webp_decoder_select="vp8_decoder"
2031 wmapro_decoder_select="mdct sinewin"
2032 wmav1_decoder_select="mdct sinewin"
2033 wmav1_encoder_select="mdct sinewin"
2034 wmav2_decoder_select="mdct sinewin"
2035 wmav2_encoder_select="mdct sinewin"
2036 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2037 wmv1_decoder_select="h263_decoder"
2038 wmv1_encoder_select="h263_encoder"
2039 wmv2_decoder_select="h263_decoder intrax8 videodsp"
2040 wmv2_encoder_select="h263_encoder"
2041 wmv3_decoder_select="vc1_decoder"
2042 wmv3image_decoder_select="wmv3_decoder"
2043 zerocodec_decoder_select="zlib"
2044 zlib_decoder_select="zlib"
2045 zlib_encoder_select="zlib"
2046 zmbv_decoder_select="zlib"
2047 zmbv_encoder_select="zlib"
2048
2049 # hardware accelerators
2050 crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
2051 dxva2_deps="dxva2api_h"
2052 vaapi_deps="va_va_h"
2053 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2054 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2055 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2056 xvmc_deps="X11_extensions_XvMClib_h"
2057
2058 h263_vaapi_hwaccel_deps="vaapi"
2059 h263_vaapi_hwaccel_select="h263_decoder"
2060 h263_vdpau_hwaccel_deps="vdpau"
2061 h263_vdpau_hwaccel_select="h263_decoder"
2062 h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
2063 h264_dxva2_hwaccel_deps="dxva2"
2064 h264_dxva2_hwaccel_select="h264_decoder"
2065 h264_vaapi_hwaccel_deps="vaapi"
2066 h264_vaapi_hwaccel_select="h264_decoder"
2067 h264_vda_decoder_deps="vda"
2068 h264_vda_decoder_select="h264_decoder"
2069 h264_vda_hwaccel_deps="vda"
2070 h264_vda_hwaccel_select="h264_decoder"
2071 h264_vdpau_decoder_deps="vdpau"
2072 h264_vdpau_decoder_select="h264_decoder"
2073 h264_vdpau_hwaccel_deps="vdpau"
2074 h264_vdpau_hwaccel_select="h264_decoder"
2075 mpeg_vdpau_decoder_deps="vdpau"
2076 mpeg_vdpau_decoder_select="mpeg2video_decoder"
2077 mpeg_xvmc_hwaccel_deps="xvmc"
2078 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
2079 mpeg1_vdpau_decoder_deps="vdpau"
2080 mpeg1_vdpau_decoder_select="mpeg1video_decoder"
2081 mpeg1_vdpau_hwaccel_deps="vdpau"
2082 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2083 mpeg1_xvmc_hwaccel_deps="xvmc"
2084 mpeg1_xvmc_hwaccel_select="mpeg1video_decoder"
2085 mpeg2_crystalhd_decoder_select="crystalhd"
2086 mpeg2_dxva2_hwaccel_deps="dxva2"
2087 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2088 mpeg2_vaapi_hwaccel_deps="vaapi"
2089 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2090 mpeg2_vdpau_hwaccel_deps="vdpau"
2091 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2092 mpeg2_xvmc_hwaccel_deps="xvmc"
2093 mpeg2_xvmc_hwaccel_select="mpeg2video_decoder"
2094 mpeg4_crystalhd_decoder_select="crystalhd"
2095 mpeg4_vaapi_hwaccel_deps="vaapi"
2096 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2097 mpeg4_vdpau_decoder_deps="vdpau"
2098 mpeg4_vdpau_decoder_select="mpeg4_decoder"
2099 mpeg4_vdpau_hwaccel_deps="vdpau"
2100 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2101 msmpeg4_crystalhd_decoder_select="crystalhd"
2102 vc1_crystalhd_decoder_select="crystalhd"
2103 vc1_dxva2_hwaccel_deps="dxva2"
2104 vc1_dxva2_hwaccel_select="vc1_decoder"
2105 vc1_vaapi_hwaccel_deps="vaapi"
2106 vc1_vaapi_hwaccel_select="vc1_decoder"
2107 vc1_vdpau_decoder_deps="vdpau"
2108 vc1_vdpau_decoder_select="vc1_decoder"
2109 vc1_vdpau_hwaccel_deps="vdpau"
2110 vc1_vdpau_hwaccel_select="vc1_decoder"
2111 wmv3_crystalhd_decoder_select="crystalhd"
2112 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2113 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2114 wmv3_vdpau_decoder_select="vc1_vdpau_decoder"
2115 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2116
2117 # parsers
2118 h264_parser_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
2119 hevc_parser_select="hevc_decoder"
2120 mpeg4video_parser_select="error_resilience mpegvideo"
2121 mpegvideo_parser_select="error_resilience mpegvideo"
2122 vc1_parser_select="mpegvideo"
2123
2124 # external libraries
2125 libaacplus_encoder_deps="libaacplus"
2126 libcelt_decoder_deps="libcelt"
2127 libfaac_encoder_deps="libfaac"
2128 libfaac_encoder_select="audio_frame_queue"
2129 libfdk_aac_decoder_deps="libfdk_aac"
2130 libfdk_aac_encoder_deps="libfdk_aac"
2131 libfdk_aac_encoder_select="audio_frame_queue"
2132 libgme_demuxer_deps="libgme"
2133 libgsm_decoder_deps="libgsm"
2134 libgsm_encoder_deps="libgsm"
2135 libgsm_ms_decoder_deps="libgsm"
2136 libgsm_ms_encoder_deps="libgsm"
2137 libilbc_decoder_deps="libilbc"
2138 libilbc_encoder_deps="libilbc"
2139 libmodplug_demuxer_deps="libmodplug"
2140 libmp3lame_encoder_deps="libmp3lame"
2141 libmp3lame_encoder_select="audio_frame_queue"
2142 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2143 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2144 libopencore_amrnb_encoder_select="audio_frame_queue"
2145 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2146 libopenjpeg_decoder_deps="libopenjpeg"
2147 libopenjpeg_encoder_deps="libopenjpeg"
2148 libopus_decoder_deps="libopus"
2149 libopus_encoder_deps="libopus"
2150 libopus_encoder_select="audio_frame_queue"
2151 libquvi_demuxer_deps="libquvi"
2152 libschroedinger_decoder_deps="libschroedinger"
2153 libschroedinger_encoder_deps="libschroedinger"
2154 libshine_encoder_deps="libshine"
2155 libshine_encoder_select="audio_frame_queue"
2156 libspeex_decoder_deps="libspeex"
2157 libspeex_encoder_deps="libspeex"
2158 libspeex_encoder_select="audio_frame_queue"
2159 libstagefright_h264_decoder_deps="libstagefright_h264"
2160 libtheora_encoder_deps="libtheora"
2161 libtwolame_encoder_deps="libtwolame"
2162 libvo_aacenc_encoder_deps="libvo_aacenc"
2163 libvo_aacenc_encoder_select="audio_frame_queue"
2164 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2165 libvorbis_decoder_deps="libvorbis"
2166 libvorbis_encoder_deps="libvorbis"
2167 libvorbis_encoder_select="audio_frame_queue"
2168 libvpx_vp8_decoder_deps="libvpx"
2169 libvpx_vp8_encoder_deps="libvpx"
2170 libvpx_vp9_decoder_deps="libvpx"
2171 libvpx_vp9_encoder_deps="libvpx"
2172 libwavpack_encoder_deps="libwavpack"
2173 libwebp_encoder_deps="libwebp"
2174 libx264_encoder_deps="libx264"
2175 libx264rgb_encoder_deps="libx264"
2176 libxavs_encoder_deps="libxavs"
2177 libxvid_encoder_deps="libxvid"
2178 libutvideo_decoder_deps="libutvideo"
2179 libutvideo_encoder_deps="libutvideo"
2180 libzvbi_teletext_decoder_deps="libzvbi"
2181
2182 # demuxers / muxers
2183 ac3_demuxer_select="ac3_parser"
2184 asf_demuxer_select="riffdec"
2185 asf_muxer_select="riffenc"
2186 asf_stream_muxer_select="asf_muxer"
2187 avi_demuxer_select="riffdec"
2188 avi_muxer_select="riffenc"
2189 avisynth_demuxer_deps="avisynth"
2190 avisynth_demuxer_select="riffdec"
2191 caf_demuxer_select="riffdec"
2192 dirac_demuxer_select="dirac_parser"
2193 dts_demuxer_select="dca_parser"
2194 dtshd_demuxer_select="dca_parser"
2195 dxa_demuxer_select="riffdec"
2196 eac3_demuxer_select="ac3_parser"
2197 f4v_muxer_select="mov_muxer"
2198 flac_demuxer_select="flac_parser"
2199 hds_muxer_select="flv_muxer"
2200 hls_muxer_select="mpegts_muxer"
2201 ipod_muxer_select="mov_muxer"
2202 ismv_muxer_select="mov_muxer"
2203 libnut_demuxer_deps="libnut"
2204 libnut_muxer_deps="libnut"
2205 matroska_audio_muxer_select="matroska_muxer"
2206 matroska_demuxer_select="riffdec"
2207 matroska_demuxer_suggest="bzlib lzo zlib"
2208 matroska_muxer_select="riffenc"
2209 mmf_muxer_select="riffenc"
2210 mov_demuxer_select="riffdec"
2211 mov_demuxer_suggest="zlib"
2212 mov_muxer_select="riffenc rtpenc_chain"
2213 mp3_demuxer_select="mpegaudio_parser"
2214 mp4_muxer_select="mov_muxer"
2215 mpegts_muxer_select="adts_muxer latm_muxer"
2216 mpegtsraw_demuxer_select="mpegts_demuxer"
2217 mxf_d10_muxer_select="mxf_muxer"
2218 nut_muxer_select="riffenc"
2219 nuv_demuxer_select="riffdec"
2220 ogg_demuxer_select="golomb"
2221 psp_muxer_select="mov_muxer"
2222 rtp_demuxer_select="sdp_demuxer"
2223 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
2224 rtsp_demuxer_select="http_protocol rtpdec"
2225 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2226 sap_demuxer_select="sdp_demuxer"
2227 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2228 sdp_demuxer_select="rtpdec"
2229 smoothstreaming_muxer_select="ismv_muxer"
2230 spdif_muxer_select="aac_parser"
2231 tak_demuxer_select="tak_parser"
2232 tg2_muxer_select="mov_muxer"
2233 tgp_muxer_select="mov_muxer"
2234 vobsub_demuxer_select="mpegps_demuxer"
2235 w64_demuxer_select="wav_demuxer"
2236 w64_muxer_select="wav_muxer"
2237 wav_demuxer_select="riffdec"
2238 wav_muxer_select="riffenc"
2239 webm_muxer_select="riffenc"
2240 wtv_demuxer_select="riffdec"
2241 xmv_demuxer_select="riffdec"
2242 xwma_demuxer_select="riffdec"
2243
2244 # indevs / outdevs
2245 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2246 alsa_outdev_deps="alsa_asoundlib_h"
2247 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2248 caca_outdev_deps="libcaca"
2249 dshow_indev_deps="IBaseFilter"
2250 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
2251 dv1394_indev_deps="dv1394"
2252 dv1394_indev_select="dv_demuxer"
2253 fbdev_indev_deps="linux_fb_h"
2254 fbdev_outdev_deps="linux_fb_h"
2255 iec61883_indev_deps="libiec61883"
2256 jack_indev_deps="jack_jack_h sem_timedwait"
2257 lavfi_indev_deps="avfilter"
2258 libcdio_indev_deps="libcdio"
2259 libdc1394_indev_deps="libdc1394"
2260 libv4l2_indev_deps="libv4l2"
2261 openal_indev_deps="openal"
2262 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2263 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2264 pulse_indev_deps="libpulse"
2265 pulse_outdev_deps="libpulse"
2266 sdl_outdev_deps="sdl"
2267 sndio_indev_deps="sndio_h"
2268 sndio_outdev_deps="sndio_h"
2269 v4l_indev_deps="linux_videodev_h"
2270 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2271 v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
2272 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2273 vfwcap_indev_extralibs="-lavicap32"
2274 xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
2275 xv_outdev_extralibs="-lXv -lX11 -lXext"
2276 x11grab_indev_deps="x11grab"
2277
2278 # protocols
2279 bluray_protocol_deps="libbluray"
2280 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2281 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2282 ffrtmpcrypt_protocol_select="tcp_protocol"
2283 ffrtmphttp_protocol_deps="!librtmp_protocol"
2284 ffrtmphttp_protocol_select="http_protocol"
2285 ftp_protocol_select="tcp_protocol"
2286 gopher_protocol_select="network"
2287 httpproxy_protocol_select="tcp_protocol"
2288 http_protocol_select="tcp_protocol"
2289 https_protocol_select="tls_protocol"
2290 librtmp_protocol_deps="librtmp"
2291 librtmpe_protocol_deps="librtmp"
2292 librtmps_protocol_deps="librtmp"
2293 librtmpt_protocol_deps="librtmp"
2294 librtmpte_protocol_deps="librtmp"
2295 libssh_protocol_deps="libssh"
2296 mmsh_protocol_select="http_protocol"
2297 mmst_protocol_select="network"
2298 rtmp_protocol_deps="!librtmp_protocol"
2299 rtmp_protocol_select="tcp_protocol"
2300 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2301 rtmps_protocol_deps="!librtmp_protocol"
2302 rtmps_protocol_select="tls_protocol"
2303 rtmpt_protocol_select="ffrtmphttp_protocol"
2304 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2305 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2306 rtp_protocol_select="udp_protocol"
2307 sctp_protocol_deps="struct_sctp_event_subscribe"
2308 sctp_protocol_select="network"
2309 srtp_protocol_select="rtp_protocol"
2310 tcp_protocol_select="network"
2311 tls_protocol_deps_any="openssl gnutls"
2312 tls_protocol_select="tcp_protocol"
2313 udp_protocol_select="network"
2314 unix_protocol_deps="sys_un_h"
2315 unix_protocol_select="network"
2316
2317 # filters
2318 aconvert_filter_deps="swresample"
2319 amovie_filter_deps="avcodec avformat"
2320 aresample_filter_deps="swresample"
2321 ass_filter_deps="libass"
2322 asyncts_filter_deps="avresample"
2323 atempo_filter_deps="avcodec"
2324 atempo_filter_select="rdft"
2325 azmq_filter_deps="libzmq"
2326 blackframe_filter_deps="gpl"
2327 boxblur_filter_deps="gpl"
2328 colormatrix_filter_deps="gpl"
2329 cropdetect_filter_deps="gpl"
2330 dctdnoiz_filter_deps="avcodec"
2331 dctdnoiz_filter_select="fft"
2332 delogo_filter_deps="gpl"
2333 deshake_filter_deps="avcodec"
2334 deshake_filter_select="dsputil"
2335 drawtext_filter_deps="libfreetype"
2336 ebur128_filter_deps="gpl"
2337 flite_filter_deps="libflite"
2338 frei0r_filter_deps="frei0r dlopen"
2339 frei0r_filter_extralibs='$ldl'
2340 frei0r_src_filter_deps="frei0r dlopen"
2341 frei0r_src_filter_extralibs='$ldl'
2342 geq_filter_deps="gpl"
2343 histeq_filter_deps="gpl"
2344 hqdn3d_filter_deps="gpl"
2345 interlace_filter_deps="gpl"
2346 kerndeint_filter_deps="gpl"
2347 ladspa_filter_deps="ladspa dlopen"
2348 mcdeint_filter_deps="avcodec gpl"
2349 movie_filter_deps="avcodec avformat"
2350 mp_filter_deps="gpl avcodec swscale inline_asm"
2351 mpdecimate_filter_deps="gpl avcodec"
2352 mptestsrc_filter_deps="gpl"
2353 negate_filter_deps="lut_filter"
2354 perspective_filter_deps="gpl"
2355 resample_filter_deps="avresample"
2356 ocv_filter_deps="libopencv"
2357 owdenoise_filter_deps="gpl"
2358 pan_filter_deps="swresample"
2359 phase_filter_deps="gpl"
2360 pp_filter_deps="gpl postproc"
2361 pullup_filter_deps="gpl"
2362 removelogo_filter_deps="avcodec avformat swscale"
2363 sab_filter_deps="gpl swscale"
2364 scale_filter_deps="swscale"
2365 smartblur_filter_deps="gpl swscale"
2366 showspectrum_filter_deps="avcodec"
2367 showspectrum_filter_select="rdft"
2368 spp_filter_deps="gpl avcodec"
2369 spp_filter_select="fft"
2370 stereo3d_filter_deps="gpl"
2371 subtitles_filter_deps="avformat avcodec libass"
2372 super2xsai_filter_deps="gpl"
2373 tinterlace_filter_deps="gpl"
2374 vidstabdetect_filter_deps="libvidstab"
2375 vidstabtransform_filter_deps="libvidstab"
2376 pixfmts_super2xsai_test_deps="super2xsai_filter"
2377 tinterlace_merge_test_deps="tinterlace_filter"
2378 tinterlace_pad_test_deps="tinterlace_filter"
2379 zmq_filter_deps="libzmq"
2380
2381 # examples
2382 decoding_encoding_example_deps="avcodec avutil"
2383 demuxing_decoding_example_deps="avcodec avformat avutil"
2384 filtering_audio_example_deps="avfilter avcodec avformat avutil"
2385 filtering_video_example_deps="avfilter avcodec avformat avutil"
2386 metadata_example_deps="avformat avutil"
2387 muxing_example_deps="avcodec avformat avutil swscale"
2388 resampling_audio_example_deps="avutil swresample"
2389 scaling_video_example_deps="avutil swscale"
2390 transcode_aac_example_deps="avcodec avformat swresample"
2391
2392 # libraries
2393 avcodec_deps="avutil"
2394 avdevice_deps="avutil avcodec avformat"
2395 avfilter_deps="avutil"
2396 avformat_deps="avutil avcodec"
2397 avresample_deps="avutil"
2398 postproc_deps="avutil gpl"
2399 swscale_deps="avutil"
2400
2401 # programs
2402 ffmpeg_deps="avcodec avfilter avformat swresample"
2403 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
2404                null_filter
2405                setpts_filter trim_filter"
2406 ffplay_deps="avcodec avformat swscale swresample sdl"
2407 ffplay_select="rdft crop_filter"
2408 ffprobe_deps="avcodec avformat"
2409 ffserver_deps="avformat fork sarestart"
2410 ffserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2411 ffserver_extralibs='$ldl'
2412
2413 # documentation
2414 podpages_deps="perl"
2415 manpages_deps="perl pod2man"
2416 htmlpages_deps="perl texi2html"
2417 txtpages_deps="perl makeinfo"
2418 doc_deps_any="manpages htmlpages podpages txtpages"
2419
2420 # default parameters
2421
2422 logfile="config.log"
2423
2424 # installation paths
2425 prefix_default="/usr/local"
2426 bindir_default='${prefix}/bin'
2427 datadir_default='${prefix}/share/ffmpeg'
2428 docdir_default='${prefix}/share/doc/ffmpeg'
2429 incdir_default='${prefix}/include'
2430 libdir_default='${prefix}/lib'
2431 mandir_default='${prefix}/share/man'
2432 shlibdir_default="$libdir_default"
2433
2434 # toolchain
2435 ar_default="ar"
2436 cc_default="gcc"
2437 cxx_default="g++"
2438 host_cc_default="gcc"
2439 cp_f="cp -f"
2440 install="install"
2441 ln_s="ln -s -f"
2442 nm_default="nm -g"
2443 objformat="elf"
2444 pkg_config_default=pkg-config
2445 ranlib="ranlib"
2446 strip_default="strip"
2447 yasmexe_default="yasm"
2448 windres_default="windres"
2449
2450 nogas=":"
2451
2452 # machine
2453 arch_default=$(uname -m)
2454 cpu="generic"
2455
2456 # OS
2457 target_os_default=$(tolower $(uname -s))
2458 host_os=$target_os_default
2459
2460 # configurable options
2461 enable $PROGRAM_LIST
2462 enable $DOCUMENT_LIST
2463 enable $EXAMPLE_LIST
2464 enable $(filter_out avresample $LIBRARY_LIST)
2465 enable stripping
2466
2467 enable asm
2468 enable debug
2469 enable doc
2470 enable optimizations
2471 enable runtime_cpudetect
2472 enable safe_bitstream_reader
2473 enable static
2474 enable swscale_alpha
2475
2476 # Enable hwaccels by default.
2477 enable dxva2 vaapi vdpau xvmc
2478
2479 # build settings
2480 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2481 LIBPREF="lib"
2482 LIBSUF=".a"
2483 FULLNAME='$(NAME)$(BUILDSUF)'
2484 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2485 SLIBPREF="lib"
2486 SLIBSUF=".so"
2487 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2488 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2489 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2490 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2491 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2492 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2493
2494 asflags_filter=echo
2495 cflags_filter=echo
2496 ldflags_filter=echo
2497
2498 AS_C='-c'
2499 AS_O='-o $@'
2500 CC_C='-c'
2501 CC_E='-E -o $@'
2502 CC_O='-o $@'
2503 CXX_C='-c'
2504 CXX_O='-o $@'
2505 LD_O='-o $@'
2506 LD_LIB='-l%'
2507 LD_PATH='-L'
2508 HOSTCC_C='-c'
2509 HOSTCC_E='-E -o $@'
2510 HOSTCC_O='-o $@'
2511 HOSTLD_O='-o $@'
2512
2513 host_cflags='-O3'
2514 host_cppflags='-D_ISOC99_SOURCE'
2515 host_libs='-lm'
2516 host_cflags_filter=echo
2517 host_ldflags_filter=echo
2518
2519 target_path='$(CURDIR)'
2520
2521 # since the object filename is not given with the -MM flag, the compiler
2522 # is only able to print the basename, and we must add the path ourselves
2523 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2524 DEPFLAGS='-MM'
2525
2526 # find source path
2527 if test -f configure; then
2528     source_path=.
2529 else
2530     source_path=$(cd $(dirname "$0"); pwd)
2531     echo "$source_path" | grep -q '[[:blank:]]' &&
2532         die "Out of tree builds are impossible with whitespace in source path."
2533     test -e "$source_path/config.h" &&
2534         die "Out of tree builds are impossible with config.h in source dir."
2535 fi
2536
2537 for v in "$@"; do
2538     r=${v#*=}
2539     l=${v%"$r"}
2540     r=$(sh_quote "$r")
2541     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
2542 done
2543
2544 find_things(){
2545     thing=$1
2546     pattern=$2
2547     file=$source_path/$3
2548     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2549 }
2550
2551 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2552 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2553 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2554 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2555 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2556 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2557 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2558 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2559 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2560 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2561 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2562
2563 ALL_COMPONENTS="
2564     $BSF_LIST
2565     $DECODER_LIST
2566     $DEMUXER_LIST
2567     $ENCODER_LIST
2568     $FILTER_LIST
2569     $HWACCEL_LIST
2570     $INDEV_LIST
2571     $MUXER_LIST
2572     $OUTDEV_LIST
2573     $PARSER_LIST
2574     $PROTOCOL_LIST
2575 "
2576
2577 for n in $COMPONENT_LIST; do
2578     v=$(toupper ${n%s})_LIST
2579     eval enable \$$v
2580     eval ${n}_if_any="\$$v"
2581 done
2582
2583 enable $ARCH_EXT_LIST
2584
2585 die_unknown(){
2586     echo "Unknown option \"$1\"."
2587     echo "See $0 --help for available options."
2588     exit 1
2589 }
2590
2591 print_3_columns() {
2592     cat | tr ' ' '\n' | sort | pr -r -3 -t
2593 }
2594
2595 show_list() {
2596     suffix=_$1
2597     shift
2598     echo $* | sed s/$suffix//g | print_3_columns
2599     exit 0
2600 }
2601
2602 rand_list(){
2603     IFS=', '
2604     set -- $*
2605     unset IFS
2606     for thing; do
2607         comp=${thing%:*}
2608         prob=${thing#$comp}
2609         prob=${prob#:}
2610         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2611         echo "prob ${prob:-0.5}"
2612         printf '%s\n' $comp
2613     done
2614 }
2615
2616 do_random(){
2617     action=$1
2618     shift
2619     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2620     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2621 }
2622
2623 for opt do
2624     optval="${opt#*=}"
2625     case "$opt" in
2626         --extra-ldflags=*)
2627             add_ldflags $optval
2628         ;;
2629         --extra-libs=*)
2630             add_extralibs $optval
2631         ;;
2632         --disable-devices)
2633             disable $INDEV_LIST $OUTDEV_LIST
2634         ;;
2635         --enable-debug=*)
2636             debuglevel="$optval"
2637         ;;
2638         --disable-programs)
2639             disable $PROGRAM_LIST
2640         ;;
2641         --disable-everything)
2642             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2643         ;;
2644         --disable-all)
2645             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2646             disable $LIBRARY_LIST $PROGRAM_LIST doc
2647         ;;
2648         --enable-random|--disable-random)
2649             action=${opt%%-random}
2650             do_random ${action#--} $COMPONENT_LIST
2651         ;;
2652         --enable-random=*|--disable-random=*)
2653             action=${opt%%-random=*}
2654             do_random ${action#--} $optval
2655         ;;
2656         --enable-*=*|--disable-*=*)
2657             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2658             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2659             eval list=\$$(toupper $thing)_LIST
2660             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2661             list=$(filter "$name" $list)
2662             [ "$list" = "" ] && warn "Option $opt did not match anything"
2663             $action $list
2664         ;;
2665         --enable-?*|--disable-?*)
2666             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2667             if is_in $option $COMPONENT_LIST; then
2668                 test $action = disable && action=unset
2669                 eval $action \$$(toupper ${option%s})_LIST
2670             elif is_in $option $CMDLINE_SELECT; then
2671                 $action $option
2672             else
2673                 die_unknown $opt
2674             fi
2675         ;;
2676         --list-*)
2677             NAME="${opt#--list-}"
2678             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2679             NAME=${NAME%s}
2680             eval show_list $NAME \$$(toupper $NAME)_LIST
2681         ;;
2682         --help|-h) show_help
2683         ;;
2684         --fatal-warnings) enable fatal_warnings
2685         ;;
2686         *)
2687             optname="${opt%%=*}"
2688             optname="${optname#--}"
2689             optname=$(echo "$optname" | sed 's/-/_/g')
2690             if is_in $optname $CMDLINE_SET; then
2691                 eval $optname='$optval'
2692             elif is_in $optname $CMDLINE_APPEND; then
2693                 append $optname "$optval"
2694             else
2695                 die_unknown $opt
2696             fi
2697         ;;
2698     esac
2699 done
2700
2701 disabled logging && logfile=/dev/null
2702
2703 echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
2704 set >> $logfile
2705
2706 test -n "$cross_prefix" && enable cross_compile
2707
2708 if enabled cross_compile; then
2709     test -n "$arch" && test -n "$target_os" ||
2710         die "Must specify target arch and OS when cross-compiling"
2711 fi
2712
2713 ar_default="${cross_prefix}${ar_default}"
2714 cc_default="${cross_prefix}${cc_default}"
2715 cxx_default="${cross_prefix}${cxx_default}"
2716 nm_default="${cross_prefix}${nm_default}"
2717 pkg_config_default="${cross_prefix}${pkg_config_default}"
2718 ranlib="${cross_prefix}${ranlib}"
2719 strip_default="${cross_prefix}${strip_default}"
2720 windres_default="${cross_prefix}${windres_default}"
2721
2722 sysinclude_default="${sysroot}/usr/include"
2723
2724 test -n "$valgrind" && toolchain="valgrind-memcheck"
2725
2726 case "$toolchain" in
2727     clang-asan)
2728         cc_default="clang"
2729         add_cflags  -fsanitize=address
2730         add_ldflags -fsanitize=address
2731     ;;
2732     clang-tsan)
2733         cc_default="clang"
2734         add_cflags  -fsanitize=thread -pie
2735         add_ldflags -fsanitize=thread -pie
2736     ;;
2737     gcc-asan)
2738         cc_default="gcc"
2739         add_cflags  -fsanitize=address
2740         add_ldflags -fsanitize=address
2741     ;;
2742     gcc-tsan)
2743         cc_default="gcc"
2744         add_cflags  -fsanitize=thread -pie -fPIC
2745         add_ldflags -fsanitize=thread -pie -fPIC
2746     ;;
2747     valgrind-massif)
2748         target_exec_default=${valgrind:-"valgrind"}
2749         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"
2750     ;;
2751     valgrind-memcheck)
2752         target_exec_default=${valgrind:-"valgrind"}
2753         target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
2754     ;;
2755     msvc)
2756         # Check whether the current MSVC version needs the C99 converter.
2757         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2758         # support enough of C99 to build ffmpeg. Default to the new
2759         # behaviour if the regexp was unable to match anything, since this
2760         # successfully parses the version number of existing supported
2761         # versions that require the converter (MSVC 2010 and 2012).
2762         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2763         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2764             cc_default="cl"
2765         else
2766             cc_default="c99wrap cl"
2767         fi
2768         ld_default="link"
2769         nm_default="dumpbin -symbols"
2770         ar_default="lib"
2771         target_os_default="win32"
2772         # Use a relative path for TMPDIR. This makes sure all the
2773         # ffconf temp files are written with a relative path, avoiding
2774         # issues with msys/win32 path conversion for MSVC parameters
2775         # such as -Fo<file> or -out:<file>.
2776         TMPDIR=.
2777     ;;
2778     icl)
2779         cc_default="icl"
2780         ld_default="xilink"
2781         nm_default="dumpbin -symbols"
2782         ar_default="xilib"
2783         target_os_default="win32"
2784         TMPDIR=.
2785     ;;
2786     gcov)
2787         add_cflags  -fprofile-arcs -ftest-coverage
2788         add_ldflags -fprofile-arcs -ftest-coverage
2789     ;;
2790     hardened)
2791         add_cflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2792         add_ldflags -Wl,-z,relro -Wl,-z,now
2793     ;;
2794     ?*)
2795         die "Unknown toolchain $toolchain"
2796     ;;
2797 esac
2798
2799 set_default arch cc cxx pkg_config strip sysinclude target_exec target_os yasmexe
2800 enabled cross_compile || host_cc_default=$cc
2801 set_default host_cc
2802
2803 if ! $pkg_config --version >/dev/null 2>&1; then
2804     warn "$pkg_config not found, library detection may fail."
2805     pkg_config=false
2806 fi
2807
2808 exesuf() {
2809     case $1 in
2810         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2811     esac
2812 }
2813
2814 EXESUF=$(exesuf $target_os)
2815 HOSTEXESUF=$(exesuf $host_os)
2816
2817 # set temporary file name
2818 : ${TMPDIR:=$TEMPDIR}
2819 : ${TMPDIR:=$TMP}
2820 : ${TMPDIR:=/tmp}
2821
2822 if [ -n "$tempprefix" ] ; then
2823     mktemp(){
2824         echo $tempprefix.${HOSTNAME}.${UID}
2825     }
2826 elif ! check_cmd mktemp -u XXXXXX; then
2827     # simple replacement for missing mktemp
2828     # NOT SAFE FOR GENERAL USE
2829     mktemp(){
2830         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2831     }
2832 fi
2833
2834 tmpfile(){
2835     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2836         (set -C; exec > $tmp) 2>/dev/null ||
2837         die "Unable to create temporary file in $TMPDIR."
2838     append TMPFILES $tmp
2839     eval $1=$tmp
2840 }
2841
2842 trap 'rm -f -- $TMPFILES' EXIT
2843
2844 tmpfile TMPASM .asm
2845 tmpfile TMPC   .c
2846 tmpfile TMPCPP .cpp
2847 tmpfile TMPE   $EXESUF
2848 tmpfile TMPH   .h
2849 tmpfile TMPO   .o
2850 tmpfile TMPS   .S
2851 tmpfile TMPSH  .sh
2852 tmpfile TMPV   .ver
2853
2854 unset -f mktemp
2855
2856 chmod +x $TMPE
2857
2858 # make sure we can execute files in $TMPDIR
2859 cat > $TMPSH 2>> $logfile <<EOF
2860 #! /bin/sh
2861 EOF
2862 chmod +x $TMPSH >> $logfile 2>&1
2863 if ! $TMPSH >> $logfile 2>&1; then
2864     cat <<EOF
2865 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2866 variable to another directory and make sure that it is not mounted noexec.
2867 EOF
2868     die "Sanity test failed."
2869 fi
2870
2871 ccc_flags(){
2872     for flag; do
2873         case $flag in
2874             -std=c99)           echo -c99                       ;;
2875             -mcpu=*)            echo -arch ${flag#*=}           ;;
2876             -mieee)             echo -ieee                      ;;
2877             -O*|-fast)          echo $flag                      ;;
2878             -fno-math-errno)    echo -assume nomath_errno       ;;
2879             -g)                 echo -g3                        ;;
2880             -Wall)              echo -msg_enable level2         ;;
2881             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2882             -Wl,*)              echo $flag                      ;;
2883             -f*|-W*)                                            ;;
2884             *)                  echo $flag                      ;;
2885         esac
2886    done
2887 }
2888
2889 cparser_flags(){
2890     for flag; do
2891         case $flag in
2892             -Wno-switch)             echo -Wno-switch-enum ;;
2893             -Wno-format-zero-length) ;;
2894             -Wdisabled-optimization) ;;
2895             -Wno-pointer-sign)       echo -Wno-other ;;
2896             *)                       echo $flag ;;
2897         esac
2898     done
2899 }
2900
2901 msvc_common_flags(){
2902     for flag; do
2903         case $flag in
2904             # In addition to specifying certain flags under the compiler
2905             # specific filters, they must be specified here as well or else the
2906             # generic catch all at the bottom will print the original flag.
2907             -Wall)                ;;
2908             -std=c99)             ;;
2909             # Common flags
2910             -fomit-frame-pointer) ;;
2911             -g)                   echo -Z7 ;;
2912             -fno-math-errno)      ;;
2913             -fno-common)          ;;
2914             -fno-signed-zeros)    ;;
2915             -fPIC)                ;;
2916             -mthumb)              ;;
2917             -march=*)             ;;
2918             -lz)                  echo zlib.lib ;;
2919             -lavifil32)           echo vfw32.lib ;;
2920             -lavicap32)           echo vfw32.lib user32.lib ;;
2921             -l*)                  echo ${flag#-l}.lib ;;
2922             *)                    echo $flag ;;
2923         esac
2924     done
2925 }
2926
2927 msvc_flags(){
2928     msvc_common_flags "$@"
2929     for flag; do
2930         case $flag in
2931             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2932                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2933                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2934                                        -wd4554 \
2935                                        -wd4273 ;;
2936         esac
2937     done
2938 }
2939
2940 icl_flags(){
2941     msvc_common_flags "$@"
2942     for flag; do
2943         case $flag in
2944             # Despite what Intel's documentation says -Wall, which is supported
2945             # on Windows, does enable remarks so disable them here.
2946             -Wall)                echo $flag -Qdiag-disable:remark ;;
2947             -std=c99)             echo -Qstd=c99 ;;
2948         esac
2949     done
2950 }
2951
2952 pgi_flags(){
2953     for flag; do
2954         case $flag in
2955             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2956             -fomit-frame-pointer) echo -Mnoframe ;;
2957             -g)                   echo -gopt ;;
2958             *)                    echo $flag ;;
2959         esac
2960     done
2961 }
2962
2963 suncc_flags(){
2964     for flag; do
2965         case $flag in
2966             -march=*|-mcpu=*)
2967                 case "${flag#*=}" in
2968                     native)                   echo -xtarget=native       ;;
2969                     v9|niagara)               echo -xarch=sparc          ;;
2970                     ultrasparc)               echo -xarch=sparcvis       ;;
2971                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2972                     i586|pentium)             echo -xchip=pentium        ;;
2973                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2974                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2975                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2976                     pentium4*)          echo -xtarget=pentium4           ;;
2977                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2978                     *-sse3)             echo -xarch=sse3                 ;;
2979                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2980                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2981                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2982                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
2983                     bdver*)                    echo -xarch=avx           ;;
2984                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2985                     k8|opteron|athlon64|athlon-fx)
2986                                                echo -xarch=sse2a         ;;
2987                     athlon*)                   echo -xarch=pentium_proa  ;;
2988                 esac
2989                 ;;
2990             -std=c99)             echo -xc99              ;;
2991             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2992             -fPIC)                echo -KPIC -xcode=pic32 ;;
2993             -W*,*)                echo $flag              ;;
2994             -f*-*|-W*|-mimpure-text)                      ;;
2995             -shared)              echo -G                 ;;
2996             *)                    echo $flag              ;;
2997         esac
2998     done
2999 }
3000
3001 tms470_flags(){
3002     for flag; do
3003         case $flag in
3004             -march=*|-mcpu=*)
3005                 case "${flag#*=}" in
3006                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3007                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3008                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3009                     armv6*|arm11*)          echo -mv=6   ;;
3010                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3011                                             echo -mv=5e  ;;
3012                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3013                 esac
3014                 ;;
3015             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3016             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3017             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3018             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3019             -msoft-float)   echo --float_support=vfplib       ;;
3020             -O[0-3]|-mf=*)  echo $flag                        ;;
3021             -g)             echo -g -mn                       ;;
3022             -pds=*)         echo $flag                        ;;
3023             -D*|-I*)        echo $flag                        ;;
3024             --gcc|--abi=*)  echo $flag                        ;;
3025             -me)            echo $flag                        ;;
3026         esac
3027     done
3028 }
3029
3030 probe_cc(){
3031     pfx=$1
3032     _cc=$2
3033
3034     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3035     unset _ld_o _ldflags _ld_lib _ld_path
3036     unset _depflags _DEPCMD _DEPFLAGS
3037     _flags_filter=echo
3038
3039     if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
3040         true # no-op to avoid reading stdin in following checks
3041     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3042         _type=llvm_gcc
3043         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
3044         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
3045         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3046         _cflags_speed='-O3'
3047         _cflags_size='-Os'
3048     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3049         _type=gcc
3050         gcc_version=$($_cc --version | head -n1)
3051         gcc_basever=$($_cc -dumpversion)
3052         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3053         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3054         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3055         if ! $_cc -dumpversion | grep -q '^2\.'; then
3056             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3057         fi
3058         _cflags_speed='-O3'
3059         _cflags_size='-Os'
3060     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3061         _type=icc
3062         _ident=$($_cc --version | head -n1)
3063         _depflags='-MMD'
3064         _cflags_speed='-O3'
3065         _cflags_size='-Os'
3066         _cflags_noopt='-O1'
3067     elif $_cc -v 2>&1 | grep -q xlc; then
3068         _type=xlc
3069         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3070         _cflags_speed='-O5'
3071         _cflags_size='-O5 -qcompact'
3072     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3073         _type=ccc
3074         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3075         _DEPFLAGS='-M'
3076         _cflags_speed='-fast'
3077         _cflags_size='-O1'
3078         _flags_filter=ccc_flags
3079     elif $_cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
3080         test -d "$sysroot" || die "No valid sysroot specified."
3081         _type=armcc
3082         _ident=$($_cc --vsn | head -n1)
3083         armcc_conf="$PWD/armcc.conf"
3084         $_cc --arm_linux_configure                 \
3085              --arm_linux_config_file="$armcc_conf" \
3086              --configure_sysroot="$sysroot"        \
3087              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3088              die "Error creating armcc configuration file."
3089         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3090         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3091         as_default="${cross_prefix}gcc"
3092         _depflags='-MMD'
3093         _cflags_speed='-O3'
3094         _cflags_size='-Os'
3095     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3096         _type=tms470
3097         _ident=$($_cc -version | head -n1 | tr -s ' ')
3098         _flags='--gcc --abi=eabi -me'
3099         _cc_e='-ppl -fe=$@'
3100         _cc_o='-fe=$@'
3101         _depflags='-ppa -ppd=$(@:.o=.d)'
3102         _cflags_speed='-O3 -mf=5'
3103         _cflags_size='-O3 -mf=2'
3104         _flags_filter=tms470_flags
3105     elif $_cc -v 2>&1 | grep -q clang; then
3106         _type=clang
3107         _ident=$($_cc --version | head -n1)
3108         _depflags='-MMD'
3109         _cflags_speed='-O3'
3110         _cflags_size='-Os'
3111     elif $_cc -V 2>&1 | grep -q Sun; then
3112         _type=suncc
3113         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3114         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3115         _DEPFLAGS='-xM1 -xc99'
3116         _ldflags='-std=c99'
3117         _cflags_speed='-O5'
3118         _cflags_size='-O5 -xspace'
3119         _flags_filter=suncc_flags
3120     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3121         _type=pathscale
3122         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3123         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3124         _cflags_speed='-O2'
3125         _cflags_size='-Os'
3126         _flags_filter='filter_out -Wdisabled-optimization'
3127     elif $_cc -v 2>&1 | grep -q Open64; then
3128         _type=open64
3129         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3130         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3131         _cflags_speed='-O2'
3132         _cflags_size='-Os'
3133         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3134     elif $_cc -V 2>&1 | grep -q Portland; then
3135         _type=pgi
3136         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3137         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3138         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3139         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3140         _cflags_noopt="-O"
3141         _flags_filter=pgi_flags
3142     elif $_cc 2>&1 | grep -q Microsoft; then
3143         _type=msvc
3144         _ident=$($cc 2>&1 | head -n1)
3145         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3146         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3147         _cflags_speed="-O2"
3148         _cflags_size="-O1"
3149         if $_cc 2>&1 | grep -q Linker; then
3150             _ld_o='-out:$@'
3151         else
3152             _ld_o='-Fe$@'
3153         fi
3154         _cc_o='-Fo$@'
3155         _cc_e='-P -Fi$@'
3156         _flags_filter=msvc_flags
3157         _ld_lib='lib%.a'
3158         _ld_path='-libpath:'
3159         _flags='-nologo'
3160         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
3161         if [ $pfx = hostcc ]; then
3162             append _cflags -Dsnprintf=_snprintf
3163         fi
3164         disable stripping
3165     elif $_cc 2>&1 | grep -q Intel; then
3166         _type=icl
3167         _ident=$($cc 2>&1 | head -n1)
3168         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3169         # Not only is O3 broken on 13.x+ but it is slower on all previous
3170         # versions (tested) as well.
3171         _cflags_speed="-O2"
3172         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3173         if $_cc 2>&1 | grep -q Linker; then
3174             _ld_o='-out:$@'
3175         else
3176             _ld_o='-Fe$@'
3177         fi
3178         _cc_o='-Fo$@'
3179         _cc_e='-P'
3180         _flags_filter=icl_flags
3181         _ld_lib='lib%.a'
3182         _ld_path='-libpath:'
3183         # -Qdiag-error to make icl error when seeing certain unknown arguments
3184         _flags='-nologo -Qdiag-error:4044,10157'
3185         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3186         # with MSVC which enables it by default.
3187         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
3188         if [ $pfx = hostcc ]; then
3189             append _cflags -Dsnprintf=_snprintf
3190         fi
3191     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3192         _type=cparser
3193         _ident=$($_cc --version | head -n1)
3194         _depflags='-MMD'
3195         _cflags_speed='-O4'
3196         _cflags_size='-O2'
3197         _flags_filter=cparser_flags
3198     fi
3199
3200     eval ${pfx}_type=\$_type
3201     eval ${pfx}_ident=\$_ident
3202 }
3203
3204 set_ccvars(){
3205     eval ${1}_C=\${_cc_c-\${${1}_C}}
3206     eval ${1}_E=\${_cc_e-\${${1}_E}}
3207     eval ${1}_O=\${_cc_o-\${${1}_O}}
3208
3209     if [ -n "$_depflags" ]; then
3210         eval ${1}_DEPFLAGS=\$_depflags
3211     else
3212         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3213         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3214         eval DEP${1}FLAGS=\$_flags
3215     fi
3216 }
3217
3218 probe_cc cc "$cc"
3219 cflags_filter=$_flags_filter
3220 cflags_speed=$_cflags_speed
3221 cflags_size=$_cflags_size
3222 cflags_noopt=$_cflags_noopt
3223 add_cflags $_flags $_cflags
3224 cc_ldflags=$_ldflags
3225 set_ccvars CC
3226
3227 probe_cc hostcc "$host_cc"
3228 host_cflags_filter=$_flags_filter
3229 add_host_cflags  $_flags $_cflags
3230 set_ccvars HOSTCC
3231
3232 test -n "$cc_type" && enable $cc_type ||
3233     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3234
3235 : ${as_default:=$cc}
3236 : ${dep_cc_default:=$cc}
3237 : ${ld_default:=$cc}
3238 : ${host_ld_default:=$host_cc}
3239 set_default ar as dep_cc ld host_ld windres
3240
3241 probe_cc as "$as"
3242 asflags_filter=$_flags_filter
3243 add_asflags $_flags $_cflags
3244 set_ccvars AS
3245
3246 probe_cc ld "$ld"
3247 ldflags_filter=$_flags_filter
3248 add_ldflags $_flags $_ldflags
3249 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3250 LD_O=${_ld_o-$LD_O}
3251 LD_LIB=${_ld_lib-$LD_LIB}
3252 LD_PATH=${_ld_path-$LD_PATH}
3253
3254 probe_cc hostld "$host_ld"
3255 host_ldflags_filter=$_flags_filter
3256 add_host_ldflags $_flags $_ldflags
3257 HOSTLD_O=${_ld_o-$HOSTLD_O}
3258
3259 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3260     probe_cc depcc "$dep_cc"
3261     CCDEP=${_DEPCMD:-$DEPCMD}
3262     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3263     DEPCCFLAGS=$_flags
3264 fi
3265
3266 if $ar 2>&1 | grep -q Microsoft; then
3267     arflags="-nologo"
3268     ar_o='-out:$@'
3269 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3270     arflags="rq"
3271     ar_o='$@'
3272 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3273     arflags='-Xany -r -c'
3274     ar_o='$@'
3275 else
3276     arflags="rc"
3277     ar_o='$@'
3278 fi
3279
3280 add_cflags $extra_cflags
3281 add_cxxflags $extra_cxxflags
3282 add_asflags $extra_cflags
3283
3284 if test -n "$sysroot"; then
3285     case "$cc_type" in
3286         gcc|llvm_gcc|clang)
3287             add_cppflags --sysroot="$sysroot"
3288             add_ldflags --sysroot="$sysroot"
3289         ;;
3290         tms470)
3291             add_cppflags -I"$sysinclude"
3292             add_ldflags  --sysroot="$sysroot"
3293         ;;
3294     esac
3295 fi
3296
3297 if test "$cpu" = host; then
3298     enabled cross_compile &&
3299         die "--cpu=host makes no sense when cross-compiling."
3300
3301     case "$cc_type" in
3302         gcc|llvm_gcc)
3303             check_native(){
3304                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3305                 sed -n "/cc1.*$1=/{
3306                             s/.*$1=\\([^ ]*\\).*/\\1/
3307                             p
3308                             q
3309                         }" $TMPE
3310             }
3311             cpu=$(check_native -march || check_native -mcpu)
3312         ;;
3313     esac
3314
3315     test "${cpu:-host}" = host &&
3316         die "--cpu=host not supported with compiler $cc"
3317 fi
3318
3319 # Deal with common $arch aliases
3320 case "$arch" in
3321     aarch64|arm64)
3322         arch="aarch64"
3323     ;;
3324     arm*|iPad*|iPhone*)
3325         arch="arm"
3326     ;;
3327     mips*|IP*)
3328         arch="mips"
3329     ;;
3330     parisc*|hppa*)
3331         arch="parisc"
3332     ;;
3333     "Power Macintosh"|ppc*|powerpc*)
3334         arch="ppc"
3335     ;;
3336     s390|s390x)
3337         arch="s390"
3338     ;;
3339     sh4|sh)
3340         arch="sh4"
3341     ;;
3342     sun4u|sparc*)
3343         arch="sparc"
3344     ;;
3345     tilegx|tile-gx)
3346         arch="tilegx"
3347     ;;
3348     i[3-6]86|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
3349         arch="x86"
3350     ;;
3351 esac
3352
3353 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3354 enable $arch
3355
3356 # Add processor-specific flags
3357 if enabled aarch64; then
3358
3359     case $cpu in
3360         armv*)
3361             cpuflags="-march=$cpu"
3362         ;;
3363         *)
3364             cpuflags="-mcpu=$cpu"
3365         ;;
3366     esac
3367
3368 elif enabled alpha; then
3369
3370     cpuflags="-mcpu=$cpu"
3371
3372 elif enabled arm; then
3373
3374     check_arm_arch() {
3375         check_cpp_condition stddef.h \
3376             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3377             $cpuflags
3378     }
3379
3380     probe_arm_arch() {
3381         if   check_arm_arch 4;        then echo armv4;
3382         elif check_arm_arch 4T;       then echo armv4t;
3383         elif check_arm_arch 5;        then echo armv5;
3384         elif check_arm_arch 5E;       then echo armv5e;
3385         elif check_arm_arch 5T;       then echo armv5t;
3386         elif check_arm_arch 5TE;      then echo armv5te;
3387         elif check_arm_arch 5TEJ;     then echo armv5te;
3388         elif check_arm_arch 6;        then echo armv6;
3389         elif check_arm_arch 6J;       then echo armv6j;
3390         elif check_arm_arch 6K;       then echo armv6k;
3391         elif check_arm_arch 6Z;       then echo armv6z;
3392         elif check_arm_arch 6ZK;      then echo armv6zk;
3393         elif check_arm_arch 6T2;      then echo armv6t2;
3394         elif check_arm_arch 7;        then echo armv7;
3395         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3396         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3397         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3398         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3399         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3400         fi
3401     }
3402
3403     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3404
3405     case $cpu in
3406         armv*)
3407             cpuflags="-march=$cpu"
3408             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3409         ;;
3410         *)
3411             cpuflags="-mcpu=$cpu"
3412             case $cpu in
3413                 cortex-a*)                               subarch=armv7a  ;;
3414                 cortex-r*)                               subarch=armv7r  ;;
3415                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3416                 arm11*)                                  subarch=armv6   ;;
3417                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3418                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3419                 *)                             subarch=$(probe_arm_arch) ;;
3420             esac
3421         ;;
3422     esac
3423
3424     case "$subarch" in
3425         armv5t*)    enable fast_clz                ;;
3426         armv[6-8]*) enable fast_clz fast_unaligned ;;
3427     esac
3428
3429 elif enabled avr32; then
3430
3431     case $cpu in
3432         ap7[02]0[0-2])
3433             subarch="avr32_ap"
3434             cpuflags="-mpart=$cpu"
3435         ;;
3436         ap)
3437             subarch="avr32_ap"
3438             cpuflags="-march=$cpu"
3439         ;;
3440         uc3[ab]*)
3441             subarch="avr32_uc"
3442             cpuflags="-mcpu=$cpu"
3443         ;;
3444         uc)
3445             subarch="avr32_uc"
3446             cpuflags="-march=$cpu"
3447         ;;
3448     esac
3449
3450 elif enabled bfin; then
3451
3452     cpuflags="-mcpu=$cpu"
3453
3454 elif enabled mips; then
3455
3456     cpuflags="-march=$cpu"
3457
3458     case $cpu in
3459         24kc)
3460             disable mipsfpu
3461             disable mipsdspr1
3462             disable mipsdspr2
3463         ;;
3464         24kf*)
3465             disable mipsdspr1
3466             disable mipsdspr2
3467         ;;
3468         24kec|34kc|1004kc)
3469             disable mipsfpu
3470             disable mipsdspr2
3471         ;;
3472         24kef*|34kf*|1004kf*)
3473             disable mipsdspr2
3474         ;;
3475         74kc)
3476             disable mipsfpu
3477         ;;
3478     esac
3479
3480 elif enabled ppc; then
3481
3482     case $(tolower $cpu) in
3483         601|ppc601|powerpc601)
3484             cpuflags="-mcpu=601"
3485             disable altivec
3486         ;;
3487         603*|ppc603*|powerpc603*)
3488             cpuflags="-mcpu=603"
3489             disable altivec
3490         ;;
3491         604*|ppc604*|powerpc604*)
3492             cpuflags="-mcpu=604"
3493             disable altivec
3494         ;;
3495         g3|75*|ppc75*|powerpc75*)
3496             cpuflags="-mcpu=750"
3497             disable altivec
3498         ;;
3499         g4|745*|ppc745*|powerpc745*)
3500             cpuflags="-mcpu=7450"
3501         ;;
3502         74*|ppc74*|powerpc74*)
3503             cpuflags="-mcpu=7400"
3504         ;;
3505         g5|970|ppc970|powerpc970)
3506             cpuflags="-mcpu=970"
3507         ;;
3508         power[3-7]*)
3509             cpuflags="-mcpu=$cpu"
3510         ;;
3511         cell)
3512             cpuflags="-mcpu=cell"
3513             enable ldbrx
3514         ;;
3515         e500mc)
3516             cpuflags="-mcpu=e500mc"
3517             disable altivec
3518         ;;
3519         e500v2)
3520             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3521             disable altivec
3522         ;;
3523         e500)
3524             cpuflags="-mcpu=8540 -mhard-float"
3525             disable altivec
3526         ;;
3527     esac
3528
3529 elif enabled sparc; then
3530
3531     case $cpu in
3532         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3533             cpuflags="-mcpu=$cpu"
3534             disable vis
3535         ;;
3536         ultrasparc*|niagara[234])
3537             cpuflags="-mcpu=$cpu"
3538         ;;
3539     esac
3540
3541 elif enabled x86; then
3542
3543     case $cpu in
3544         i[345]86|pentium)
3545             cpuflags="-march=$cpu"
3546             disable mmx
3547         ;;
3548         # targets that do NOT support nopl and conditional mov (cmov)
3549         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3550             cpuflags="-march=$cpu"
3551             disable i686
3552         ;;
3553         # targets that do support nopl and conditional mov (cmov)
3554         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3555             cpuflags="-march=$cpu"
3556             enable i686
3557             enable fast_cmov
3558         ;;
3559         # targets that do support conditional mov but on which it's slow
3560         pentium4|pentium4m|prescott|nocona)
3561             cpuflags="-march=$cpu"
3562             enable i686
3563             disable fast_cmov
3564         ;;
3565     esac
3566
3567 fi
3568
3569 if [ "$cpu" != generic ]; then
3570     add_cflags  $cpuflags
3571     add_asflags $cpuflags
3572 fi
3573
3574 # compiler sanity check
3575 check_exec <<EOF
3576 int main(void){ return 0; }
3577 EOF
3578 if test "$?" != 0; then
3579     echo "$cc is unable to create an executable file."
3580     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3581         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3582         echo "Only do this if you know what cross compiling means."
3583     fi
3584     die "C compiler test failed."
3585 fi
3586
3587 add_cppflags -D_ISOC99_SOURCE
3588 add_cxxflags -D__STDC_CONSTANT_MACROS
3589 check_cflags -std=c99
3590 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3591 #include <stdlib.h>
3592 EOF
3593 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3594 #include <stdlib.h>
3595 EOF
3596
3597 check_host_cflags -std=c99
3598 check_host_cflags -Wall
3599
3600 check_64bit(){
3601     arch32=$1
3602     arch64=$2
3603     expr=$3
3604     check_code cc "" "int test[2*($expr) - 1]" &&
3605         subarch=$arch64 || subarch=$arch32
3606 }
3607
3608 case "$arch" in
3609     aarch64|alpha|ia64)
3610         spic=$shared
3611     ;;
3612     mips)
3613         check_64bit mips mips64 '_MIPS_SIM > 1'
3614         spic=$shared
3615     ;;
3616     parisc)
3617         check_64bit parisc parisc64 'sizeof(void *) > 4'
3618         spic=$shared
3619     ;;
3620     ppc)
3621         check_64bit ppc ppc64 'sizeof(void *) > 4'
3622         spic=$shared
3623     ;;
3624     sparc)
3625         check_64bit sparc sparc64 'sizeof(void *) > 4'
3626         spic=$shared
3627     ;;
3628     x86)
3629         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3630         if test "$subarch" = "x86_64"; then
3631             spic=$shared
3632         fi
3633     ;;
3634     ppc)
3635         check_cc <<EOF && subarch="ppc64"
3636         int test[(int)sizeof(char*) - 7];
3637 EOF
3638     ;;
3639 esac
3640
3641 enable $subarch
3642 enabled spic && enable_weak pic
3643
3644 # OS specific
3645 case $target_os in
3646     aix)
3647         SHFLAGS=-shared
3648         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3649         enabled shared && add_ldflags -Wl,-brtl
3650         ;;
3651     haiku)
3652         prefix_default="/boot/common"
3653         network_extralibs="-lnetwork"
3654         host_libs=
3655         ;;
3656     sunos)
3657         SHFLAGS='-shared -Wl,-h,$$(@F)'
3658         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3659         network_extralibs="-lsocket -lnsl"
3660         # When using suncc to build, the Solaris linker will mark
3661         # an executable with each instruction set encountered by
3662         # the Solaris assembler.  As our libraries contain their own
3663         # guards for processor-specific code, instead suppress
3664         # generation of the HWCAPS ELF section on Solaris x86 only.
3665         enabled_all suncc x86 &&
3666             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3667             add_ldflags -Wl,-M,mapfile
3668         nm_default='nm -P -g'
3669         ;;
3670     netbsd)
3671         disable symver
3672         oss_indev_extralibs="-lossaudio"
3673         oss_outdev_extralibs="-lossaudio"
3674         enabled gcc || check_ldflags -Wl,-zmuldefs
3675         ;;
3676     openbsd|bitrig)
3677         disable symver
3678         SHFLAGS='-shared'
3679         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3680         SLIB_INSTALL_LINKS=
3681         oss_indev_extralibs="-lossaudio"
3682         oss_outdev_extralibs="-lossaudio"
3683         ;;
3684     dragonfly)
3685         disable symver
3686         ;;
3687     freebsd)
3688         ;;
3689     bsd/os)
3690         add_extralibs -lpoll -lgnugetopt
3691         strip="strip -d"
3692         ;;
3693     darwin)
3694         gas="gas-preprocessor.pl $cc"
3695         enabled ppc && add_asflags -force_cpusubtype_ALL
3696         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3697         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3698         strip="${strip} -x"
3699         add_ldflags -Wl,-dynamic,-search_paths_first
3700         SLIBSUF=".dylib"
3701         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3702         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3703         objformat="macho"
3704         enabled x86_64 && objformat="macho64"
3705         enabled_any pic shared ||
3706             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3707         ;;
3708     mingw32*)
3709         if test $target_os = "mingw32ce"; then
3710             disable network
3711         else
3712             target_os=mingw32
3713         fi
3714         LIBTARGET=i386
3715         if enabled x86_64; then
3716             LIBTARGET="i386:x86-64"
3717         elif enabled arm; then
3718             LIBTARGET=arm-wince
3719         fi
3720         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3721         check_ldflags -Wl,--nxcompat
3722         check_ldflags -Wl,--dynamicbase
3723         shlibdir_default="$bindir_default"
3724         SLIBPREF=""
3725         SLIBSUF=".dll"
3726         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3727         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3728         dlltool="${cross_prefix}dlltool"
3729         if check_cmd lib.exe -list; then
3730             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); lib.exe /machine:$(LIBTARGET) /def:$$(@:$(SLIBSUF)=.def) /out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3731             if enabled x86_64; then
3732                 LIBTARGET=x64
3733             fi
3734         elif check_cmd $dlltool --version; then
3735             SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3736         fi
3737         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3738         SLIB_INSTALL_LINKS=
3739         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3740         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3741         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3742         objformat="win32"
3743         ranlib=:
3744         enable dos_paths
3745         ;;
3746     win32|win64)
3747         disable symver
3748         if enabled shared; then
3749             # Link to the import library instead of the normal static library
3750             # for shared libs.
3751             LD_LIB='%.lib'
3752             # Cannot build both shared and static libs with MSVC or icl.
3753             disable static
3754         fi
3755         shlibdir_default="$bindir_default"
3756         SLIBPREF=""
3757         SLIBSUF=".dll"
3758         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3759         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3760         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3761         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3762         SLIB_INSTALL_LINKS=
3763         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3764         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3765         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3766         objformat="win32"
3767         ranlib=:
3768         enable dos_paths
3769         ;;
3770     cygwin*)
3771         target_os=cygwin
3772         shlibdir_default="$bindir_default"
3773         SLIBPREF="cyg"
3774         SLIBSUF=".dll"
3775         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3776         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3777         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3778         SLIB_INSTALL_LINKS=
3779         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3780         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3781         objformat="win32"
3782         enable dos_paths
3783         enabled shared && ! enabled small && check_cmd $windres --version && enable gnu_windres
3784         ;;
3785     *-dos|freedos|opendos)
3786         network_extralibs="-lsocket"
3787         objformat="coff"
3788         enable dos_paths
3789         add_cppflags -U__STRICT_ANSI__
3790         ;;
3791     linux)
3792         enable dv1394
3793         ;;
3794     irix*)
3795         target_os=irix
3796         ranlib="echo ignoring ranlib"
3797         ;;
3798     os/2*)
3799         strip="lxlite -CS"
3800         ln_s="cp -f"
3801         objformat="aout"
3802         add_cppflags -D_GNU_SOURCE
3803         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3804         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3805         LIBSUF="_s.a"
3806         SLIBPREF=""
3807         SLIBSUF=".dll"
3808         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3809         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3810         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3811             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3812             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3813             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3814             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3815             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3816         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3817             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3818         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3819         enable dos_paths
3820         enable_weak os2threads
3821         ;;
3822     gnu/kfreebsd)
3823         add_cppflags -D_BSD_SOURCE
3824         ;;
3825     gnu)
3826         ;;
3827     qnx)
3828         add_cppflags -D_QNX_SOURCE
3829         network_extralibs="-lsocket"
3830         ;;
3831     symbian)
3832         SLIBSUF=".dll"
3833         enable dos_paths
3834         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3835         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3836         add_ldflags -Wl,--target1-abs,--no-undefined \
3837                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3838                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3839         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3840                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3841                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3842         ;;
3843     osf1)
3844         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3845         ;;
3846     minix)
3847         ;;
3848     plan9)
3849         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3850                      -D_REENTRANT_SOURCE        \
3851                      -D_RESEARCH_SOURCE         \
3852                      -DFD_SETSIZE=96            \
3853                      -DHAVE_SOCK_OPTS
3854         add_compat strtod.o strtod=avpriv_strtod
3855         network_extralibs='-lbsd'
3856         exeobjs=compat/plan9/main.o
3857         disable ffserver
3858         cp_f='cp'
3859         ;;
3860     none)
3861         ;;
3862     *)
3863         die "Unknown OS '$target_os'."
3864         ;;
3865 esac
3866
3867 # determine libc flavour
3868
3869 probe_libc(){
3870     pfx=$1
3871     pfx_no_=${pfx%_}
3872     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3873     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3874         eval ${pfx}libc_type=uclibc
3875         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3876     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3877         eval ${pfx}libc_type=glibc
3878         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3879     # MinGW headers can be installed on Cygwin, so check for newlib first.
3880     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3881         eval ${pfx}libc_type=newlib
3882         add_${pfx}cppflags -U__STRICT_ANSI__
3883     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3884     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3885         eval ${pfx}libc_type=mingw64
3886         if check_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
3887             add_compat msvcrt/snprintf.o
3888             add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
3889         fi
3890         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3891         eval test \$${pfx_no_}cc_type = "gcc" &&
3892             add_${pfx}cppflags -D__printf__=__gnu_printf__
3893     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3894          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3895         eval ${pfx}libc_type=mingw32
3896         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3897             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3898             die "ERROR: MinGW32 runtime version must be >= 3.15."
3899         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3900         eval test \$${pfx_no_}cc_type = "gcc" &&
3901             add_${pfx}cppflags -D__printf__=__gnu_printf__
3902     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3903         eval ${pfx}libc_type=msvcrt
3904         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3905         # 0x601 by default unless something else is set by the user.
3906         # This can easily lead to us detecting functions only present
3907         # in such new versions and producing binaries requiring windows 7.0.
3908         # Therefore explicitly set the default to XP unless the user has
3909         # set something else on the command line.
3910         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3911             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
3912     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3913         eval ${pfx}libc_type=klibc
3914     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3915         eval ${pfx}libc_type=bionic
3916     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3917         eval ${pfx}libc_type=solaris
3918         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3919     fi
3920 }
3921
3922 probe_libc
3923 test -n "$libc_type" && enable libc_$libc_type
3924 probe_libc host_
3925 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3926
3927 case $libc_type in
3928     bionic)
3929         add_compat strtod.o strtod=avpriv_strtod
3930         ;;
3931     msvcrt)
3932         add_compat strtod.o strtod=avpriv_strtod
3933         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3934                                      _snprintf=avpriv_snprintf  \
3935                                      vsnprintf=avpriv_vsnprintf
3936         ;;
3937 esac
3938
3939 # hacks for compiler/libc/os combinations
3940
3941 if enabled_all tms470 libc_glibc; then
3942     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3943     add_cppflags -D__USER_LABEL_PREFIX__=
3944     add_cppflags -D__builtin_memset=memset
3945     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3946     add_cflags   -pds=48    # incompatible redefinition of macro
3947 fi
3948
3949 if enabled_all ccc libc_glibc; then
3950     add_ldflags -Wl,-z,now  # calls to libots crash without this
3951 fi
3952
3953 esc(){
3954     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3955 }
3956
3957 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" >config.fate
3958
3959 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3960
3961 set_default $PATHS_LIST
3962 set_default nm
3963
3964 # we need to build at least one lib type
3965 if ! enabled_any static shared; then
3966     cat <<EOF
3967 At least one library type must be built.
3968 Specify --enable-static to build the static libraries or --enable-shared to
3969 build the shared libraries as well. To only build the shared libraries specify
3970 --disable-static in addition to --enable-shared.
3971 EOF
3972     exit 1;
3973 fi
3974
3975 # backward compatibility layer for incompatible_libav/fork_abi
3976 enabled incompatible_fork_abi  && enable incompatible_libav_abi
3977 enabled incompatible_libav_abi && enable incompatible_fork_abi
3978
3979 die_license_disabled() {
3980     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3981 }
3982
3983 die_license_disabled_gpl() {
3984     enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
3985 }
3986
3987 die_license_disabled gpl frei0r
3988 die_license_disabled gpl libcdio
3989 die_license_disabled gpl libutvideo
3990 die_license_disabled gpl libvidstab
3991 die_license_disabled gpl libx264
3992 die_license_disabled gpl libxavs
3993 die_license_disabled gpl libxvid
3994 die_license_disabled gpl libzvbi
3995 die_license_disabled gpl x11grab
3996
3997 die_license_disabled nonfree libaacplus
3998 die_license_disabled nonfree libfaac
3999 enabled gpl && die_license_disabled_gpl nonfree libfdk_aac
4000 enabled gpl && die_license_disabled_gpl nonfree openssl
4001
4002 die_license_disabled version3 libopencore_amrnb
4003 die_license_disabled version3 libopencore_amrwb
4004 die_license_disabled version3 libvo_aacenc
4005 die_license_disabled version3 libvo_amrwbenc
4006
4007 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4008
4009 disabled optimizations || check_cflags -fomit-frame-pointer
4010
4011 enable_weak_pic() {
4012     disabled pic && return
4013     enable pic
4014     add_cppflags -DPIC
4015     case "$target_os" in
4016     mingw*|cygwin*)
4017         ;;
4018     *)
4019         add_cflags -fPIC
4020         ;;
4021     esac
4022     add_asflags  -fPIC
4023 }
4024
4025 enabled pic && enable_weak_pic
4026
4027 check_cc <<EOF || die "Symbol mangling check failed."
4028 int ff_extern;
4029 EOF
4030 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4031 extern_prefix=${sym%%ff_extern*}
4032
4033 check_cc <<EOF && enable_weak inline_asm
4034 void foo(void) { __asm__ volatile ("" ::); }
4035 EOF
4036
4037 _restrict=
4038 for restrict_keyword in restrict __restrict__ __restrict; do
4039     check_cc <<EOF && _restrict=$restrict_keyword && break
4040 void foo(char * $restrict_keyword p);
4041 EOF
4042 done
4043
4044 check_cc <<EOF && enable pragma_deprecated
4045 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4046 EOF
4047
4048 check_cc <<EOF && enable attribute_packed
4049 struct { int x; } __attribute__((packed)) x;
4050 EOF
4051
4052 check_cc <<EOF && enable attribute_may_alias
4053 union { int x; } __attribute__((may_alias)) x;
4054 EOF
4055
4056 check_cc <<EOF || die "endian test failed"
4057 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4058 EOF
4059 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4060
4061 check_inline_asm inline_asm_labels '"1:\n"'
4062
4063 if enabled aarch64; then
4064     # internal assembler in clang 3.3 does not support this instruction
4065     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4066     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4067
4068     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4069
4070 elif enabled alpha; then
4071
4072     check_cflags -mieee
4073
4074 elif enabled arm; then
4075
4076     check_cpp_condition stddef.h "defined __thumb__" && check_cc <<EOF && enable_weak thumb
4077 float func(float a, float b){ return a+b; }
4078 EOF
4079
4080     enabled thumb && check_cflags -mthumb || check_cflags -marm
4081     nogas=die
4082
4083     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4084         enable vfp_args
4085     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
4086         case "${cross_prefix:-$cc}" in
4087             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4088             *) check_ld "cc" <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4089 __asm__ (".eabi_attribute 28, 1");
4090 int main(void) { return 0; }
4091 EOF
4092         esac
4093         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4094     fi
4095
4096     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4097     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4098     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4099     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4100     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4101     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4102
4103     [ $target_os = linux ] ||
4104         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4105             $ARCH_EXT_LIST_ARM
4106
4107     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4108     check_inline_asm asm_mod_y '"vmul.i32 d0, d0, %y0" :: "x"(0)'
4109
4110     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4111
4112 elif enabled mips; then
4113
4114     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4115     enabled mips32r2  && add_cflags "-mips32r2" && add_asflags "-mips32r2" &&
4116      check_inline_asm mips32r2  '"rotr $t0, $t1, 1"'
4117     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
4118      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
4119     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
4120      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
4121     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
4122      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
4123
4124 elif enabled parisc; then
4125
4126     if enabled gcc; then
4127         case $($cc -dumpversion) in
4128             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4129         esac
4130     fi
4131
4132 elif enabled ppc; then
4133
4134     enable local_aligned_8 local_aligned_16
4135
4136     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4137     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4138     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4139     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4140
4141     # AltiVec flags: The FSF version of GCC differs from the Apple version
4142     if enabled altivec; then
4143         if ! enabled_any pic ppc64; then
4144             nogas=warn
4145         fi
4146         check_cflags -maltivec -mabi=altivec &&
4147         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4148         check_cflags -faltivec
4149
4150         # check if our compiler supports Motorola AltiVec C API
4151         check_cc <<EOF || disable altivec
4152 $inc_altivec_h
4153 int main(void) {
4154     vector signed int v1 = (vector signed int) { 0 };
4155     vector signed int v2 = (vector signed int) { 1 };
4156     v1 = vec_add(v1, v2);
4157     return 0;
4158 }
4159 EOF
4160
4161         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4162     fi
4163
4164 elif enabled sparc; then
4165
4166     enabled vis && check_inline_asm vis '"pdist %f0, %f0, %f0"'
4167
4168 elif enabled x86; then
4169
4170     check_builtin rdtsc    intrin.h   "__rdtsc()"
4171     check_builtin mm_empty mmintrin.h "_mm_empty()"
4172
4173     enable local_aligned_8 local_aligned_16
4174
4175     # check whether EBP is available on x86
4176     # As 'i' is stored on the stack, this program will crash
4177     # if the base pointer is used to access it because the
4178     # base pointer is cleared in the inline assembly code.
4179     check_exec_crash <<EOF && enable ebp_available
4180 volatile int i=0;
4181 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4182 return i;
4183 EOF
4184
4185     # check whether EBX is available on x86
4186     check_inline_asm ebx_available '""::"b"(0)' &&
4187         check_inline_asm ebx_available '"":::"%ebx"'
4188
4189     # check whether xmm clobbers are supported
4190     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4191
4192     # check whether binutils is new enough to compile SSSE3/MMXEXT
4193     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4194     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4195
4196     if ! disabled_any asm mmx yasm; then
4197         if check_cmd $yasmexe --version; then
4198             enabled x86_64 && yasm_extra="-m amd64"
4199             yasm_debug="-g dwarf2"
4200         elif check_cmd nasm -v; then
4201             yasmexe=nasm
4202             yasm_debug="-g -F dwarf"
4203             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4204         fi
4205
4206         YASMFLAGS="-f $objformat $yasm_extra"
4207         enabled pic               && append YASMFLAGS "-DPIC"
4208         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4209         case "$objformat" in
4210             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4211         esac
4212
4213         check_yasm "movbe ecx, [5]" && enable yasm ||
4214             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4215         check_yasm "vextractf128 xmm0, ymm0, 0"      || disable avx_external avresample
4216         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4217         check_yasm "CPU amdnop" && enable cpunop
4218     fi
4219
4220     case "$cpu" in
4221         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4222             disable fast_clz
4223         ;;
4224     esac
4225
4226 fi
4227
4228 if enabled asm; then
4229     as=${gas:=$as}
4230     check_as <<EOF && enable gnu_as || \
4231         $nogas "GNU assembler not found, install gas-preprocessor"
4232 .macro m n
4233 \n: .int 0
4234 .endm
4235 m x
4236 EOF
4237 fi
4238
4239 check_ldflags -Wl,--as-needed
4240
4241 if check_func dlopen; then
4242     ldl=
4243 elif check_func dlopen -ldl; then
4244     ldl=-ldl
4245 fi
4246
4247 if ! disabled network; then
4248     check_type "sys/types.h sys/socket.h" socklen_t
4249     check_type netdb.h "struct addrinfo"
4250     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4251     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4252     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4253     check_type netinet/in.h "struct sockaddr_in6"
4254     check_type poll.h "struct pollfd"
4255     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4256     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4257     check_type netinet/sctp.h "struct sctp_event_subscribe"
4258     check_func getaddrinfo $network_extralibs
4259     check_func getservbyport $network_extralibs
4260     # Prefer arpa/inet.h over winsock2
4261     if check_header arpa/inet.h ; then
4262         check_func closesocket
4263     elif check_header winsock2.h ; then
4264         check_func_headers winsock2.h closesocket -lws2 &&
4265             network_extralibs="-lws2" ||
4266         { check_func_headers winsock2.h closesocket -lws2_32 &&
4267             network_extralibs="-lws2_32"; } || disable winsock2_h network
4268         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4269         check_type ws2tcpip.h socklen_t
4270         check_type ws2tcpip.h "struct addrinfo"
4271         check_type ws2tcpip.h "struct group_source_req"
4272         check_type ws2tcpip.h "struct ip_mreq_source"
4273         check_type ws2tcpip.h "struct ipv6_mreq"
4274         check_type winsock2.h "struct pollfd"
4275         check_type ws2tcpip.h "struct sockaddr_in6"
4276         check_type ws2tcpip.h "struct sockaddr_storage"
4277         check_struct winsock2.h "struct sockaddr" sa_len
4278     else
4279         disable network
4280     fi
4281 fi
4282
4283 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4284 check_func nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
4285
4286 check_func  access
4287 check_func  clock_gettime || { check_func clock_gettime -lrt && add_extralibs -lrt; }
4288 check_func  fcntl
4289 check_func  fork
4290 check_func_headers stdlib.h getenv
4291 check_func  gethrtime
4292 check_func  getopt
4293 check_func  getrusage
4294 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4295 check_func  gettimeofday
4296 check_func  inet_aton $network_extralibs
4297 check_func  isatty
4298 check_func  localtime_r
4299 check_func  ${malloc_prefix}memalign            && enable memalign
4300 check_func  mkstemp
4301 check_func  mmap
4302 check_func  mprotect
4303 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4304 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4305 check_func  setrlimit
4306 check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE
4307 check_func  strerror_r
4308 check_func  sched_getaffinity
4309 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4310 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4311 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4312 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4313 check_builtin sarestart signal.h "SA_RESTART"
4314 check_func  sysconf
4315 check_func  sysctl
4316 check_func  usleep
4317 check_func_headers conio.h kbhit
4318 check_func_headers windows.h PeekNamedPipe
4319 check_func_headers io.h setmode
4320 check_func_headers lzo/lzo1x.h lzo1x_999_compress
4321 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4322 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4323 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4324 check_func_headers windows.h GetProcessAffinityMask
4325 check_func_headers windows.h GetProcessTimes
4326 check_func_headers windows.h GetSystemTimeAsFileTime
4327 check_func_headers windows.h MapViewOfFile
4328 check_func_headers windows.h SetConsoleTextAttribute
4329 check_func_headers windows.h Sleep
4330 check_func_headers windows.h VirtualAlloc
4331 check_func_headers glob.h glob
4332 check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
4333
4334 check_header cl/cl.h
4335 check_header direct.h
4336 check_header dlfcn.h
4337 check_header dxva.h
4338 check_header dxva2api.h -D_WIN32_WINNT=0x0600
4339 check_header io.h
4340 check_header libcrystalhd/libcrystalhd_if.h
4341 check_header malloc.h
4342 check_header poll.h
4343 check_header sys/mman.h
4344 check_header sys/param.h
4345 check_header sys/resource.h
4346 check_header sys/select.h
4347 check_header sys/time.h
4348 check_header sys/un.h
4349 check_header termios.h
4350 check_header unistd.h
4351 check_header vdpau/vdpau.h
4352 check_header vdpau/vdpau_x11.h
4353 check_header VideoDecodeAcceleration/VDADecoder.h
4354 check_header windows.h
4355 check_header X11/extensions/XvMClib.h
4356 check_header asm/types.h
4357
4358 if ! disabled w32threads && ! enabled pthreads; then
4359     check_func_headers "windows.h process.h" _beginthreadex &&
4360         enable w32threads || disable w32threads
4361 fi
4362
4363 # check for some common methods of building with pthread support
4364 # do this before the optional library checks as some of them require pthreads
4365 if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
4366     enable pthreads
4367     if check_func pthread_join -pthread && check_func pthread_create -pthread; then
4368         add_cflags -pthread
4369         add_extralibs -pthread
4370     elif check_func pthread_join -pthreads && check_func pthread_create -pthreads; then
4371         add_cflags -pthreads
4372         add_extralibs -pthreads
4373     elif check_func pthread_join -lpthreadGC2 && check_func pthread_create -lpthreadGC2; then
4374         add_extralibs -lpthreadGC2
4375     elif check_lib pthread.h pthread_join -lpthread && check_lib pthread.h pthread_create -lpthread; then
4376         :
4377     elif ! check_func pthread_join && ! check_func pthread_create; then
4378         disable pthreads
4379     fi
4380     check_code cc "pthread.h" "static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER" || disable pthreads
4381 fi
4382
4383 for thread in $THREADS_LIST; do
4384     if enabled $thread; then
4385         test -n "$thread_type" &&
4386             die "ERROR: Only one thread type must be selected." ||
4387             thread_type="$thread"
4388     fi
4389 done
4390
4391 if enabled pthreads; then
4392   check_func pthread_cancel
4393 fi
4394
4395 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4396 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4397
4398 check_lib math.h sin -lm && LIBM="-lm"
4399 disabled crystalhd || check_lib libcrystalhd/libcrystalhd_if.h DtsCrystalHDVersion -lcrystalhd || disable crystalhd
4400
4401 atan2f_args=2
4402 ldexpf_args=2
4403 powf_args=2
4404
4405 for func in $MATH_FUNCS; do
4406     eval check_mathfunc $func \${${func}_args:-1}
4407 done
4408
4409 # these are off by default, so fail if requested and not available
4410 enabled avisynth          && { { check_lib2 "windows.h" LoadLibrary; } ||
4411                                { check_lib2 "dlfcn.h" dlopen -ldl; } ||
4412                                die "ERROR: LoadLibrary/dlopen not found for avisynth"; }
4413 enabled fontconfig        && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4414 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4415 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4416 enabled ladspa            && { check_header ladspa.h || die "ERROR: ladspa.h header not found"; }
4417 enabled libiec61883       && require libiec61883 libiec61883/iec61883.h iec61883_cmp_connect -lraw1394 -lavc1394 -lrom1394 -liec61883
4418 enabled libaacplus        && require "libaacplus >= 2.0.0" aacplus.h aacplusEncOpen -laacplus
4419 enabled libass            && require_pkg_config libass ass/ass.h ass_library_init
4420 enabled libbluray         && require libbluray libbluray/bluray.h bd_open -lbluray
4421 enabled libcelt           && require libcelt celt/celt.h celt_decode -lcelt0 &&
4422                              { check_lib celt/celt.h celt_decoder_create_custom -lcelt0 ||
4423                                die "ERROR: libcelt must be installed and version must be >= 0.11.0."; }
4424 enabled libcaca           && require_pkg_config caca caca.h caca_create_canvas
4425 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4426 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
4427 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"
4428 enabled libflite          && require2 libflite "flite/flite.h" flite_init $flite_libs
4429 enabled libfreetype       && require_libfreetype
4430 enabled libgme            && require  libgme gme/gme.h gme_new_emu -lgme -lstdc++
4431 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4432                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4433                                done || die "ERROR: libgsm not found"; }
4434 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4435 enabled libmodplug        && require libmodplug libmodplug/modplug.h ModPlug_Load -lmodplug
4436 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4437 enabled libnut            && require libnut libnut.h nut_demuxer_init -lnut
4438 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4439 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4440 enabled libopencv         && require_pkg_config opencv opencv/cxcore.h cvCreateImageHeader
4441 enabled libopenjpeg       && { check_lib openjpeg-1.5/openjpeg.h opj_version -lopenjpeg ||
4442                                check_lib openjpeg.h opj_version -lopenjpeg ||
4443                                die "ERROR: libopenjpeg not found"; }
4444 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4445 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4446 enabled libquvi           && require_pkg_config libquvi quvi/quvi.h quvi_init
4447 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4448 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4449 enabled libshine          && require_pkg_config shine shine/layer3.h shine_encode_buffer
4450 enabled libsoxr           && require libsoxr soxr.h soxr_create -lsoxr
4451 enabled libssh            && require_pkg_config libssh libssh/sftp.h sftp_init
4452 enabled libspeex          && require libspeex speex/speex.h speex_decoder_init -lspeex
4453 enabled libstagefright_h264 && require_cpp libstagefright_h264 "binder/ProcessState.h media/stagefright/MetaData.h
4454     media/stagefright/MediaBufferGroup.h media/stagefright/MediaDebug.h media/stagefright/MediaDefs.h
4455     media/stagefright/OMXClient.h media/stagefright/OMXCodec.h" android::OMXClient -lstagefright -lmedia -lutils -lbinder -lgnustl_static
4456 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4457 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame &&
4458                              { check_lib twolame.h twolame_encode_buffer_float32_interleaved -ltwolame ||
4459                                die "ERROR: libtwolame must be installed and version must be >= 0.3.10"; }
4460 enabled libutvideo        && require_cpp utvideo "stdint.h stdlib.h utvideo/utvideo.h utvideo/Codec.h" 'CCodec*' -lutvideo -lstdc++
4461 enabled libv4l2           && require_pkg_config libv4l2 libv4l2.h v4l2_ioctl
4462 enabled libvidstab        && require_pkg_config "vidstab >= 0.98" vid.stab/libvidstab.h vsMotionDetectInit
4463 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4464 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4465 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4466 enabled libvpx            && {
4467     enabled libvpx_vp8_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
4468                                     die "ERROR: libvpx decoder version must be >=0.9.1"; }
4469     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 ||
4470                                     die "ERROR: libvpx encoder version must be >=0.9.7"; }
4471     enabled libvpx_vp9_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx" -lvpx || disable libvpx_vp9_decoder; }
4472     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; } }
4473 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4474 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4475 enabled libx264           && require libx264 x264.h x264_encoder_encode -lx264 &&
4476                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4477                                die "ERROR: libx264 must be installed and version must be >= 0.118."; }
4478 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4479 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4480 enabled libzmq            && require_pkg_config libzmq zmq.h zmq_ctx_new
4481 enabled libzvbi           && require libzvbi libzvbi.h vbi_decoder_new -lzvbi
4482 enabled openal            && { { for al_libs in "${OPENAL_LIBS}" "-lopenal" "-lOpenAL32"; do
4483                                check_lib 'AL/al.h' alGetError "${al_libs}" && break; done } ||
4484                                die "ERROR: openal not found"; } &&
4485                              { check_cpp_condition "AL/al.h" "defined(AL_VERSION_1_1)" ||
4486                                die "ERROR: openal must be installed and version must be 1.1 or compatible"; }
4487 enabled opencl            && { check_lib2 OpenCL/cl.h clEnqueueNDRangeKernel -Wl,-framework,OpenCL ||
4488                                check_lib2 CL/cl.h clEnqueueNDRangeKernel -lOpenCL ||
4489                                die "ERROR: opencl not found"; } &&
4490                              { ! enabled_any w32threads os2threads ||
4491                                die "opencl currently needs --enable-pthreads or --disable-w32threads"; } &&
4492                              { check_cpp_condition "OpenCL/cl.h" "defined(CL_VERSION_1_2)" ||
4493                                check_cpp_condition "CL/cl.h" "defined(CL_VERSION_1_2)" ||
4494                                die "ERROR: opencl must be installed and version must be 1.2 or compatible"; }
4495 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4496                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4497                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4498                                die "ERROR: openssl not found"; }
4499
4500 if enabled gnutls; then
4501     { check_lib nettle/bignum.h nettle_mpz_get_str_256 -lnettle -lhogweed -lgmp && enable nettle; } ||
4502     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4503 fi
4504
4505 # libdc1394 check
4506 if enabled libdc1394; then
4507     { check_lib dc1394/dc1394.h dc1394_new -ldc1394 -lraw1394 &&
4508         enable libdc1394_2; } ||
4509     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4510         enable libdc1394_1; } ||
4511     die "ERROR: No version of libdc1394 found "
4512 fi
4513
4514 SDL_CONFIG="${cross_prefix}sdl-config"
4515 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4516     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4517     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4518     enable sdl
4519 else
4520   if "${SDL_CONFIG}" --version > /dev/null 2>&1; then
4521     sdl_cflags=$("${SDL_CONFIG}" --cflags)
4522     sdl_libs=$("${SDL_CONFIG}" --libs)
4523     check_func_headers SDL_version.h SDL_Linked_Version $sdl_cflags $sdl_libs &&
4524     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4525     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4526     enable sdl
4527   fi
4528 fi
4529 enabled sdl && add_cflags $sdl_cflags && add_extralibs $sdl_libs
4530
4531 texi2html --help 2> /dev/null | grep -q 'init-file' && enable texi2html || disable texi2html
4532 makeinfo --version > /dev/null 2>&1 && enable makeinfo  || disable makeinfo
4533 perl -v            > /dev/null 2>&1 && enable perl      || disable perl
4534 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4535 rsync --help 2> /dev/null | grep -q 'contimeout' && enable rsync_contimeout || disable rsync_contimeout
4536
4537 check_header linux/fb.h
4538 check_header linux/videodev.h
4539 check_header linux/videodev2.h
4540 check_code cc linux/videodev2.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_safe struct_v4l2_frmivalenum_discrete
4541
4542 check_header sys/videoio.h
4543
4544 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4545 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4546 # w32api 3.12 had it defined wrong
4547 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4548
4549 check_type "dshow.h" IBaseFilter
4550
4551 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4552 { check_header dev/bktr/ioctl_meteor.h &&
4553   check_header dev/bktr/ioctl_bt848.h; } ||
4554 { check_header machine/ioctl_meteor.h &&
4555   check_header machine/ioctl_bt848.h; } ||
4556 { check_header dev/video/meteor/ioctl_meteor.h &&
4557   check_header dev/video/bktr/ioctl_bt848.h; } ||
4558 check_header dev/ic/bt8xx.h
4559
4560 check_header sndio.h
4561 if check_struct sys/soundcard.h audio_buf_info bytes; then
4562     enable_safe sys/soundcard.h
4563 else
4564     check_cc -D__BSD_VISIBLE -D__XSI_VISIBLE <<EOF && add_cppflags -D__BSD_VISIBLE -D__XSI_VISIBLE && enable_safe sys/soundcard.h
4565     #include <sys/soundcard.h>
4566     audio_buf_info abc;
4567 EOF
4568 fi
4569 check_header soundcard.h
4570
4571 enabled_any alsa_indev alsa_outdev &&
4572     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4573
4574 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack && check_func sem_timedwait &&
4575     check_func jack_port_get_latency_range -ljack
4576
4577 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4578
4579 if enabled libcdio; then
4580     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4581     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4582     die "ERROR: libcdio-paranoia not found"
4583 fi
4584
4585 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4586
4587 enabled x11grab                                           &&
4588 require Xext X11/extensions/XShm.h XShmCreateImage -lXext &&
4589 require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes &&
4590 { enabled xlib || die "ERROR: Xlib not found"; }
4591
4592 enabled vaapi &&
4593     check_lib va/va.h vaInitialize -lva ||
4594     disable vaapi
4595
4596 enabled vdpau &&
4597     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4598     disable vdpau
4599
4600 enabled vdpau && enabled xlib &&
4601     check_lib2 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4602     enable vdpau_x11
4603
4604 # Funny iconv installations are not unusual, so check it after all flags have been set
4605 disabled iconv || check_func_headers iconv.h iconv || check_lib2 iconv.h iconv -liconv || disable iconv
4606
4607 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4608
4609 # add some useful compiler flags if supported
4610 check_cflags -Wdeclaration-after-statement
4611 check_cflags -Wall
4612 check_cflags -Wdisabled-optimization
4613 check_cflags -Wpointer-arith
4614 check_cflags -Wredundant-decls
4615 check_cflags -Wwrite-strings
4616 check_cflags -Wtype-limits
4617 check_cflags -Wundef
4618 check_cflags -Wmissing-prototypes
4619 check_cflags -Wno-pointer-to-int-cast
4620 check_cflags -Wstrict-prototypes
4621 enabled extra_warnings && check_cflags -Winline
4622
4623 check_disable_warning(){
4624     warning_flag=-W${1#-Wno-}
4625     test_cflags $warning_flag && add_cflags $1
4626 }
4627
4628 check_disable_warning -Wno-parentheses
4629 check_disable_warning -Wno-switch
4630 check_disable_warning -Wno-format-zero-length
4631 check_disable_warning -Wno-pointer-sign
4632
4633 # add some linker flags
4634 check_ldflags -Wl,--warn-common
4635 check_ldflags -Wl,-rpath-link=libpostproc:libswresample:libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4636 enabled rpath && add_ldflags -Wl,-rpath=$libdir
4637 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4638
4639 # add some strip flags
4640 # -wN '..@*' is more selective than -x, but not available everywhere.
4641 check_stripflags -wN \'..@*\' || check_stripflags -x
4642
4643 enabled neon_clobber_test &&
4644     check_ldflags -Wl,--wrap,avcodec_open2              \
4645                   -Wl,--wrap,avcodec_decode_audio4      \
4646                   -Wl,--wrap,avcodec_decode_video2      \
4647                   -Wl,--wrap,avcodec_decode_subtitle2   \
4648                   -Wl,--wrap,avcodec_encode_audio2      \
4649                   -Wl,--wrap,avcodec_encode_video2      \
4650                   -Wl,--wrap,avcodec_encode_subtitle    \
4651                   -Wl,--wrap,avresample_convert ||
4652     disable neon_clobber_test
4653
4654 enabled xmm_clobber_test &&
4655     check_ldflags -Wl,--wrap,avcodec_open2              \
4656                   -Wl,--wrap,avcodec_decode_audio4      \
4657                   -Wl,--wrap,avcodec_decode_video2      \
4658                   -Wl,--wrap,avcodec_decode_subtitle2   \
4659                   -Wl,--wrap,avcodec_encode_audio2      \
4660                   -Wl,--wrap,avcodec_encode_video       \
4661                   -Wl,--wrap,avcodec_encode_video2      \
4662                   -Wl,--wrap,avcodec_encode_subtitle    \
4663                   -Wl,--wrap,avresample_convert         \
4664                   -Wl,--wrap,sws_scale ||
4665     disable xmm_clobber_test
4666
4667 echo "X{};" > $TMPV
4668 if test_ldflags -Wl,--version-script,$TMPV; then
4669     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4670     check_cc <<EOF && enable symver_asm_label
4671 void ff_foo(void) __asm__ ("av_foo@VERSION");
4672 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4673 EOF
4674     check_cc <<EOF && enable symver_gnu_asm
4675 __asm__(".symver ff_foo,av_foo@VERSION");
4676 void ff_foo(void) {}
4677 EOF
4678 fi
4679
4680 if [ -z "$optflags" ]; then
4681     if enabled small; then
4682         optflags=$cflags_size
4683     elif enabled optimizations; then
4684         optflags=$cflags_speed
4685     else
4686         optflags=$cflags_noopt
4687     fi
4688 fi
4689
4690 check_optflags(){
4691     check_cflags "$@"
4692     enabled lto && check_ldflags "$@"
4693 }
4694
4695
4696 if enabled lto; then
4697     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4698     check_cflags  -flto
4699     check_ldflags -flto $cpuflags
4700 fi
4701
4702 check_optflags $optflags
4703 check_optflags -fno-math-errno
4704 check_optflags -fno-signed-zeros
4705
4706 enabled ftrapv && check_cflags -ftrapv
4707
4708 check_cc -mno-red-zone <<EOF && noredzone_flags="-mno-red-zone"
4709 int x;
4710 EOF
4711
4712
4713 if enabled icc; then
4714     # Just warnings, no remarks
4715     check_cflags -w1
4716     # -wd: Disable following warnings
4717     # 144, 167, 556: -Wno-pointer-sign
4718     # 188: enumerated type mixed with another type
4719     # 1292: attribute "foo" ignored
4720     # 1419: external declaration in primary source file
4721     # 10006: ignoring unknown option -fno-signed-zeros
4722     # 10148: ignoring unknown option -Wno-parentheses
4723     # 10156: ignoring option '-W'; no argument required
4724     check_cflags -wd144,167,188,556,1292,1419,10006,10148,10156
4725     # 11030: Warning unknown option --as-needed
4726     # 10156: ignoring option '-export'; no argument required
4727     check_ldflags -wd10156,11030
4728     # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
4729     enable ebp_available
4730     if enabled x86_32; then
4731         icc_version=$($cc -dumpversion)
4732         test ${icc_version%%.*} -ge 11 &&
4733             check_cflags -falign-stack=maintain-16-byte ||
4734             disable aligned_stack
4735     fi
4736 elif enabled ccc; then
4737     # disable some annoying warnings
4738     add_cflags -msg_disable bitnotint
4739     add_cflags -msg_disable mixfuncvoid
4740     add_cflags -msg_disable nonstandcast
4741     add_cflags -msg_disable unsupieee
4742 elif enabled gcc; then
4743     check_optflags -fno-tree-vectorize
4744     check_cflags -Werror=implicit-function-declaration
4745     check_cflags -Werror=missing-prototypes
4746     check_cflags -Werror=return-type
4747     check_cflags -Werror=vla
4748     enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
4749 elif enabled llvm_gcc; then
4750     check_cflags -mllvm -stack-alignment=16
4751 elif enabled clang; then
4752     check_cflags -mllvm -stack-alignment=16
4753     check_cflags -Qunused-arguments
4754     check_cflags -Werror=implicit-function-declaration
4755     check_cflags -Werror=missing-prototypes
4756     check_cflags -Werror=return-type
4757 elif enabled cparser; then
4758     add_cflags -Wno-missing-variable-declarations
4759     add_cflags -Wno-empty-statement
4760 elif enabled armcc; then
4761     # 2523: use of inline assembler is deprecated
4762     add_cflags -W${armcc_opt},--diag_suppress=2523