Work around broken floating point limits on some systems.
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # Libav 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 LIBAV, 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 Libav."
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:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix]
82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
85   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89
90 Licensing options:
91   --enable-gpl             allow use of GPL code, the resulting libs
92                            and binaries will be under GPL [no]
93   --enable-version3        upgrade (L)GPL to version 3 [no]
94   --enable-nonfree         allow use of nonfree code, the resulting libs
95                            and binaries will be unredistributable [no]
96
97 Configuration options:
98   --disable-static         do not build static libraries [no]
99   --enable-shared          build shared libraries [no]
100   --enable-small           optimize for size instead of speed
101   --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
102   --enable-gray            enable full grayscale support (slower color)
103   --disable-swscale-alpha  disable alpha channel support in swscale
104   --disable-all            disable building components, libraries and programs
105
106 Program options:
107   --disable-programs       do not build command line programs
108   --disable-avconv         disable avconv build
109   --disable-avplay         disable avplay build
110   --disable-avprobe        disable avprobe build
111   --disable-avserver       disable avserver build
112
113 Component options:
114   --disable-doc            do not build documentation
115   --disable-avdevice       disable libavdevice build
116   --disable-avcodec        disable libavcodec build
117   --disable-avformat       disable libavformat build
118   --disable-avutil         disable libavutil build
119   --disable-swscale        disable libswscale build
120   --disable-avfilter       disable video filter support [no]
121   --disable-avresample     disable libavresample build [no]
122   --disable-pthreads       disable pthreads [auto]
123   --disable-w32threads     disable Win32 threads [auto]
124   --disable-network        disable network support [no]
125   --disable-dct            disable DCT code
126   --disable-error-resilience disable error resilience code
127   --disable-lsp            disable LSP code
128   --disable-lzo            disable LZO decoder code
129   --disable-mdct           disable MDCT code
130   --disable-rdft           disable RDFT code
131   --disable-fft            disable FFT code
132
133 Hardware accelerators:
134   --enable-dxva2           enable DXVA2 code
135   --enable-vaapi           enable VAAPI code
136   --enable-vda             enable VDA code
137   --enable-vdpau           enable VDPAU code
138
139 Individual component options:
140   --disable-everything     disable all components listed below
141   --disable-encoder=NAME   disable encoder NAME
142   --enable-encoder=NAME    enable encoder NAME
143   --disable-encoders       disable all encoders
144   --disable-decoder=NAME   disable decoder NAME
145   --enable-decoder=NAME    enable decoder NAME
146   --disable-decoders       disable all decoders
147   --disable-hwaccel=NAME   disable hwaccel NAME
148   --enable-hwaccel=NAME    enable hwaccel NAME
149   --disable-hwaccels       disable all hwaccels
150   --disable-muxer=NAME     disable muxer NAME
151   --enable-muxer=NAME      enable muxer NAME
152   --disable-muxers         disable all muxers
153   --disable-demuxer=NAME   disable demuxer NAME
154   --enable-demuxer=NAME    enable demuxer NAME
155   --disable-demuxers       disable all demuxers
156   --enable-parser=NAME     enable parser NAME
157   --disable-parser=NAME    disable parser NAME
158   --disable-parsers        disable all parsers
159   --enable-bsf=NAME        enable bitstream filter NAME
160   --disable-bsf=NAME       disable bitstream filter NAME
161   --disable-bsfs           disable all bitstream filters
162   --enable-protocol=NAME   enable protocol NAME
163   --disable-protocol=NAME  disable protocol NAME
164   --disable-protocols      disable all protocols
165   --enable-indev=NAME      enable input device NAME
166   --disable-indev=NAME     disable input device NAME
167   --disable-indevs         disable input devices
168   --enable-outdev=NAME     enable output device NAME
169   --disable-outdev=NAME    disable output device NAME
170   --disable-outdevs        disable output devices
171   --disable-devices        disable all devices
172   --enable-filter=NAME     enable filter NAME
173   --disable-filter=NAME    disable filter NAME
174   --disable-filters        disable all filters
175
176 External library support:
177   --enable-avisynth        enable reading of AviSynth script files [no]
178   --enable-bzlib           enable bzlib [autodetect]
179   --enable-frei0r          enable frei0r video filtering
180   --enable-gnutls          enable gnutls [no]
181   --enable-libcdio         enable audio CD grabbing with libcdio
182   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
183                            and libraw1394 [no]
184   --enable-libfaac         enable AAC encoding via libfaac [no]
185   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
186   --enable-libfreetype     enable libfreetype [no]
187   --enable-libgsm          enable GSM de/encoding via libgsm [no]
188   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
189   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
190   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
191   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
192   --enable-libopencv       enable video filtering via libopencv [no]
193   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
194   --enable-libopus         enable Opus decoding via libopus [no]
195   --enable-libpulse        enable Pulseaudio input via libpulse [no]
196   --enable-librtmp         enable RTMP[E] support via librtmp [no]
197   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
198   --enable-libspeex        enable Speex de/encoding via libspeex [no]
199   --enable-libtheora       enable Theora encoding via libtheora [no]
200   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
201   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
202   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
203   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
204   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
205   --enable-libwebp         enable WebP encoding via libwebp [no]
206   --enable-libx264         enable H.264 encoding via x264 [no]
207   --enable-libx265         enable HEVC encoding via x265 [no]
208   --enable-libxavs         enable AVS encoding via xavs [no]
209   --enable-libxvid         enable Xvid encoding via xvidcore,
210                            native MPEG-4/Xvid encoder exists [no]
211   --enable-openssl         enable openssl [no]
212   --enable-x11grab         enable X11 grabbing [no]
213   --enable-zlib            enable zlib [autodetect]
214
215 Advanced options (experts only):
216   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
217   --enable-cross-compile   assume a cross-compiler is used
218   --sysroot=PATH           root of cross-build tree
219   --sysinclude=PATH        location of cross-build system headers
220   --target-os=OS           compiler targets OS [$target_os]
221   --target-exec=CMD        command to run executables on target
222   --target-path=DIR        path to view of build directory on target
223   --target-samples=DIR     path to samples directory on target
224   --toolchain=NAME         set tool defaults according to NAME
225   --nm=NM                  use nm tool
226   --ar=AR                  use archive tool AR [$ar_default]
227   --as=AS                  use assembler AS [$as_default]
228   --cc=CC                  use C compiler CC [$cc_default]
229   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
230   --ld=LD                  use linker LD
231   --host-cc=HOSTCC         use host C compiler HOSTCC
232   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
233   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
234   --host-ld=HOSTLD         use host linker HOSTLD
235   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
236   --host-libs=HLIBS        use libs HLIBS when linking for host
237   --host-os=OS             compiler host OS [$target_os]
238   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
239   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
240   --extra-libs=ELIBS       add ELIBS [$ELIBS]
241   --extra-version=STRING   version string suffix []
242   --optflags=OPTFLAGS      override optimization-related compiler flags
243   --build-suffix=SUFFIX    library name suffix []
244   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
245   --arch=ARCH              select architecture [$arch]
246   --cpu=CPU                select the minimum required CPU (affects
247                            instruction selection, may crash on older CPUs)
248   --enable-pic             build position-independent code
249   --enable-sram            allow use of on-chip SRAM
250   --enable-thumb           compile for Thumb instruction set
251   --disable-symver         disable symbol versioning
252   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
253   --disable-safe-bitstream-reader
254                            disable buffer boundary checking in bitreaders
255                            (faster, but may crash)
256   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
257   --enable-lto             use link-time optimization
258
259 Optimization options (experts only):
260   --disable-asm            disable all assembler optimizations
261   --disable-altivec        disable AltiVec optimizations
262   --disable-amd3dnow       disable 3DNow! optimizations
263   --disable-amd3dnowext    disable 3DNow! extended optimizations
264   --disable-mmx            disable MMX optimizations
265   --disable-mmxext         disable MMXEXT optimizations
266   --disable-sse            disable SSE optimizations
267   --disable-sse2           disable SSE2 optimizations
268   --disable-sse3           disable SSE3 optimizations
269   --disable-ssse3          disable SSSE3 optimizations
270   --disable-sse4           disable SSE4 optimizations
271   --disable-sse42          disable SSE4.2 optimizations
272   --disable-avx            disable AVX optimizations
273   --disable-xop            disable XOP optimizations
274   --disable-fma3           disable FMA3 optimizations
275   --disable-fma4           disable FMA4 optimizations
276   --disable-avx2           disable AVX2 optimizations
277   --disable-armv5te        disable armv5te optimizations
278   --disable-armv6          disable armv6 optimizations
279   --disable-armv6t2        disable armv6t2 optimizations
280   --disable-vfp            disable VFP optimizations
281   --disable-neon           disable NEON optimizations
282   --disable-vis            disable VIS optimizations
283   --disable-inline-asm     disable use of inline assembler
284   --disable-yasm           disable use of yasm assembler
285
286 Developer options (useful when working on Libav itself):
287   --disable-debug          disable debugging symbols
288   --enable-debug=LEVEL     set the debug level [$debuglevel]
289   --disable-optimizations  disable compiler optimizations
290   --enable-extra-warnings  enable more compiler warnings
291   --samples=PATH           location of test samples for FATE, if not set use
292                            \$LIBAV_SAMPLES at make invocation time.
293   --enable-neon-clobber-test check NEON registers for clobbering (should be
294                            used only for debugging purposes)
295   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
296                            should be used only for debugging purposes)
297   --enable-random          randomly enable/disable components
298   --disable-random
299   --enable-random=LIST     randomly enable/disable specific components or
300   --disable-random=LIST    component groups. LIST is a comma-separated list
301                            of NAME[:PROB] entries where NAME is a component
302                            (group) and PROB the probability associated with
303                            NAME (default 0.5).
304   --random-seed=VALUE      seed value for --enable/disable-random
305
306 NOTE: Object files are built at the place where configure is launched.
307 EOF
308   exit 0
309 }
310
311 quotes='""'
312
313 log(){
314     echo "$@" >> $logfile
315 }
316
317 log_file(){
318     log BEGIN $1
319     pr -n -t $1 >> $logfile
320     log END $1
321 }
322
323 echolog(){
324     log "$@"
325     echo "$@"
326 }
327
328 warn(){
329     log "WARNING: $*"
330     WARNINGS="${WARNINGS}WARNING: $*\n"
331 }
332
333 die(){
334     echolog "$@"
335     cat <<EOF
336
337 If you think configure made a mistake, make sure you are using the latest
338 version from Git.  If the latest version fails, report the problem to the
339 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
340 EOF
341     if disabled logging; then
342         cat <<EOF
343 Rerun configure with logging enabled (do not use --disable-logging), and
344 include the log this produces with your report.
345 EOF
346     else
347         cat <<EOF
348 Include the log file "$logfile" produced by configure as this will help
349 solving the problem.
350 EOF
351     fi
352     exit 1
353 }
354
355 # Avoid locale weirdness, besides we really just want to translate ASCII.
356 toupper(){
357     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
358 }
359
360 tolower(){
361     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
362 }
363
364 c_escape(){
365     echo "$*" | sed 's/["\\]/\\\0/g'
366 }
367
368 sh_quote(){
369     v=$(echo "$1" | sed "s/'/'\\\\''/g")
370     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
371     echo "$v"
372 }
373
374 cleanws(){
375     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
376 }
377
378 filter(){
379     pat=$1
380     shift
381     for v; do
382         eval "case $v in $pat) echo $v ;; esac"
383     done
384 }
385
386 filter_out(){
387     pat=$1
388     shift
389     for v; do
390         eval "case $v in $pat) ;; *) echo $v ;; esac"
391     done
392 }
393
394 map(){
395     m=$1
396     shift
397     for v; do eval $m; done
398 }
399
400 add_suffix(){
401     suffix=$1
402     shift
403     for v; do echo ${v}${suffix}; done
404 }
405
406 set_all(){
407     value=$1
408     shift
409     for var in $*; do
410         eval $var=$value
411     done
412 }
413
414 set_weak(){
415     value=$1
416     shift
417     for var; do
418         eval : \${$var:=$value}
419     done
420 }
421
422 sanitize_var_name(){
423     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
424 }
425
426 set_safe(){
427     var=$1
428     shift
429     eval $(sanitize_var_name "$var")='$*'
430 }
431
432 get_safe(){
433     eval echo \$$(sanitize_var_name "$1")
434 }
435
436 pushvar(){
437     for pvar in $*; do
438         eval level=\${${pvar}_level:=0}
439         eval ${pvar}_${level}="\$$pvar"
440         eval ${pvar}_level=$(($level+1))
441     done
442 }
443
444 popvar(){
445     for pvar in $*; do
446         eval level=\${${pvar}_level:-0}
447         test $level = 0 && continue
448         eval level=$(($level-1))
449         eval $pvar="\${${pvar}_${level}}"
450         eval ${pvar}_level=$level
451         eval unset ${pvar}_${level}
452     done
453 }
454
455 enable(){
456     set_all yes $*
457 }
458
459 disable(){
460     set_all no $*
461 }
462
463 enable_weak(){
464     set_weak yes $*
465 }
466
467 disable_weak(){
468     set_weak no $*
469 }
470
471 enable_safe(){
472     for var; do
473         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
474     done
475 }
476
477 disable_safe(){
478     for var; do
479         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
480     done
481 }
482
483 do_enable_deep(){
484     for var; do
485         enabled $var && continue
486         eval sel="\$${var}_select"
487         eval sgs="\$${var}_suggest"
488         pushvar var sgs
489         enable_deep $sel
490         popvar sgs
491         enable_deep_weak $sgs
492         popvar var
493     done
494 }
495
496 enable_deep(){
497     do_enable_deep $*
498     enable $*
499 }
500
501 enable_deep_weak(){
502     for var; do
503         disabled $var && continue
504         pushvar var
505         do_enable_deep $var
506         popvar var
507         enable_weak $var
508     done
509 }
510
511 enabled(){
512     test "${1#!}" = "$1" && op== || op=!=
513     eval test "x\$${1#!}" $op "xyes"
514 }
515
516 disabled(){
517     test "${1#!}" = "$1" && op== || op=!=
518     eval test "x\$${1#!}" $op "xno"
519 }
520
521 enabled_all(){
522     for opt; do
523         enabled $opt || return 1
524     done
525 }
526
527 disabled_all(){
528     for opt; do
529         disabled $opt || return 1
530     done
531 }
532
533 enabled_any(){
534     for opt; do
535         enabled $opt && return 0
536     done
537 }
538
539 disabled_any(){
540     for opt; do
541         disabled $opt && return 0
542     done
543     return 1
544 }
545
546 set_default(){
547     for opt; do
548         eval : \${$opt:=\$${opt}_default}
549     done
550 }
551
552 is_in(){
553     value=$1
554     shift
555     for var in $*; do
556         [ $var = $value ] && return 0
557     done
558     return 1
559 }
560
561 do_check_deps(){
562     for cfg; do
563         cfg="${cfg#!}"
564         enabled ${cfg}_checking && die "Circular dependency for $cfg."
565         disabled ${cfg}_checking && continue
566         enable ${cfg}_checking
567         append allopts $cfg
568
569         eval dep_all="\$${cfg}_deps"
570         eval dep_any="\$${cfg}_deps_any"
571         eval dep_sel="\$${cfg}_select"
572         eval dep_sgs="\$${cfg}_suggest"
573         eval dep_ifa="\$${cfg}_if"
574         eval dep_ifn="\$${cfg}_if_any"
575
576         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
577         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
578         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
579
580         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
581         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
582         enabled_all  $dep_all || disable $cfg
583         enabled_any  $dep_any || disable $cfg
584         disabled_any $dep_sel && disable $cfg
585
586         if enabled $cfg; then
587             enable_deep $dep_sel
588             enable_deep_weak $dep_sgs
589         fi
590
591         disable ${cfg}_checking
592     done
593 }
594
595 check_deps(){
596     unset allopts
597
598     do_check_deps "$@"
599
600     for cfg in $allopts; do
601         enabled $cfg || continue
602         eval dep_extralibs="\$${cfg}_extralibs"
603         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
604     done
605 }
606
607 print_config(){
608     pfx=$1
609     files=$2
610     shift 2
611     map 'eval echo "$v \${$v:-no}"' "$@" |
612     awk "BEGIN { split(\"$files\", files) }
613         {
614             c = \"$pfx\" toupper(\$1);
615             v = \$2;
616             sub(/yes/, 1, v);
617             sub(/no/,  0, v);
618             for (f in files) {
619                 file = files[f];
620                 if (file ~ /\\.h\$/) {
621                     printf(\"#define %s %d\\n\", c, v) >>file;
622                 } else if (file ~ /\\.asm\$/) {
623                     printf(\"%%define %s %d\\n\", c, v) >>file;
624                 } else if (file ~ /\\.mak\$/) {
625                     n = -v ? \"\" : \"!\";
626                     printf(\"%s%s=yes\\n\", n, c) >>file;
627                 }
628             }
629         }"
630 }
631
632 print_enabled(){
633     suf=$1
634     shift
635     for v; do
636         enabled $v && printf "%s\n" ${v%$suf};
637     done
638 }
639
640 append(){
641     var=$1
642     shift
643     eval "$var=\"\$$var $*\""
644 }
645
646 prepend(){
647     var=$1
648     shift
649     eval "$var=\"$* \$$var\""
650 }
651
652 add_cppflags(){
653     append CPPFLAGS "$@"
654 }
655
656 add_cflags(){
657     append CFLAGS $($cflags_filter "$@")
658 }
659
660 add_asflags(){
661     append ASFLAGS $($asflags_filter "$@")
662 }
663
664 add_ldflags(){
665     append LDFLAGS $($ldflags_filter "$@")
666 }
667
668 add_stripflags(){
669     append STRIPFLAGS "$@"
670 }
671
672 add_extralibs(){
673     prepend extralibs $($ldflags_filter "$@")
674 }
675
676 add_host_cppflags(){
677     append host_cppflags "$@"
678 }
679
680 add_host_cflags(){
681     append host_cflags $($host_cflags_filter "$@")
682 }
683
684 add_host_ldflags(){
685     append host_ldflags $($host_ldflags_filter "$@")
686 }
687
688 add_compat(){
689     append compat_objs $1
690     shift
691     map 'add_cppflags -D$v' "$@"
692 }
693
694 check_cmd(){
695     log "$@"
696     "$@" >> $logfile 2>&1
697 }
698
699 cc_o(){
700     eval printf '%s\\n' $CC_O
701 }
702
703 cc_e(){
704     eval printf '%s\\n' $CC_E
705 }
706
707 check_cc(){
708     log check_cc "$@"
709     cat > $TMPC
710     log_file $TMPC
711     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
712 }
713
714 check_cpp(){
715     log check_cpp "$@"
716     cat > $TMPC
717     log_file $TMPC
718     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
719 }
720
721 as_o(){
722     eval printf '%s\\n' $AS_O
723 }
724
725 check_as(){
726     log check_as "$@"
727     cat > $TMPS
728     log_file $TMPS
729     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
730 }
731
732 check_inline_asm(){
733     log check_inline_asm "$@"
734     name="$1"
735     code="$2"
736     shift 2
737     disable $name
738     check_cc "$@" <<EOF && enable $name
739 void foo(void){ __asm__ volatile($code); }
740 EOF
741 }
742
743 check_insn(){
744     log check_insn "$@"
745     check_inline_asm ${1}_inline "\"$2\""
746     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
747 }
748
749 check_yasm(){
750     log check_yasm "$@"
751     echo "$1" > $TMPS
752     log_file $TMPS
753     shift 1
754     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
755 }
756
757 ld_o(){
758     eval printf '%s\\n' $LD_O
759 }
760
761 check_ld(){
762     log check_ld "$@"
763     flags=$(filter_out '-l*' "$@")
764     libs=$(filter '-l*' "$@")
765     check_cc $($cflags_filter $flags) || return
766     flags=$($ldflags_filter $flags)
767     libs=$($ldflags_filter $libs)
768     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
769 }
770
771 print_include(){
772     hdr=$1
773     test "${hdr%.h}" = "${hdr}" &&
774         echo "#include $hdr"    ||
775         echo "#include <$hdr>"
776 }
777
778 check_code(){
779     log check_code "$@"
780     check=$1
781     headers=$2
782     code=$3
783     shift 3
784     {
785         for hdr in $headers; do
786             print_include $hdr
787         done
788         echo "int main(void) { $code; return 0; }"
789     } | check_$check "$@"
790 }
791
792 check_cppflags(){
793     log check_cppflags "$@"
794     check_cc "$@" <<EOF && append CPPFLAGS "$@"
795 int x;
796 EOF
797 }
798
799 test_cflags(){
800     log test_cflags "$@"
801     set -- $($cflags_filter "$@")
802     check_cc "$@" <<EOF
803 int x;
804 EOF
805 }
806
807 check_cflags(){
808     log check_cflags "$@"
809     test_cflags "$@" && add_cflags "$@"
810 }
811
812 test_ldflags(){
813     log test_ldflags "$@"
814     check_ld "$@" <<EOF
815 int main(void){ return 0; }
816 EOF
817 }
818
819 check_ldflags(){
820     log check_ldflags "$@"
821     test_ldflags "$@" && add_ldflags "$@"
822 }
823
824 test_stripflags(){
825     log test_stripflags "$@"
826     # call check_cc to get a fresh TMPO
827     check_cc <<EOF
828 int main(void) { return 0; }
829 EOF
830     check_cmd $strip $STRIPFLAGS "$@" $TMPO
831 }
832
833 check_stripflags(){
834     log check_stripflags "$@"
835     test_stripflags "$@" && add_stripflags "$@"
836 }
837
838 check_header(){
839     log check_header "$@"
840     header=$1
841     shift
842     disable_safe $header
843     check_cpp "$@" <<EOF && enable_safe $header
844 #include <$header>
845 int x;
846 EOF
847 }
848
849 check_func(){
850     log check_func "$@"
851     func=$1
852     shift
853     disable $func
854     check_ld "$@" <<EOF && enable $func
855 extern int $func();
856 int main(void){ $func(); }
857 EOF
858 }
859
860 check_mathfunc(){
861     log check_mathfunc "$@"
862     func=$1
863     narg=$2
864     shift 2
865     test $narg = 2 && args="f, g" || args="f"
866     disable $func
867     check_ld "$@" <<EOF && enable $func
868 #include <math.h>
869 float foo(float f, float g) { return $func($args); }
870 int main(void){ return 0; }
871 EOF
872 }
873
874 check_func_headers(){
875     log check_func_headers "$@"
876     headers=$1
877     funcs=$2
878     shift 2
879     {
880         for hdr in $headers; do
881             print_include $hdr
882         done
883         for func in $funcs; do
884             echo "long check_$func(void) { return (long) $func; }"
885         done
886         echo "int main(void) { return 0; }"
887     } | check_ld "$@" && enable $funcs && enable_safe $headers
888 }
889
890 check_cpp_condition(){
891     log check_cpp_condition "$@"
892     header=$1
893     condition=$2
894     shift 2
895     check_cpp "$@" <<EOF
896 #include <$header>
897 #if !($condition)
898 #error "unsatisfied condition: $condition"
899 #endif
900 EOF
901 }
902
903 check_lib(){
904     log check_lib "$@"
905     header="$1"
906     func="$2"
907     shift 2
908     check_header $header && check_func $func "$@" && add_extralibs "$@"
909 }
910
911 check_lib2(){
912     log check_lib2 "$@"
913     headers="$1"
914     funcs="$2"
915     shift 2
916     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
917 }
918
919 check_pkg_config(){
920     log check_pkg_config "$@"
921     pkg="$1"
922     headers="$2"
923     funcs="$3"
924     shift 3
925     check_cmd $pkg_config --exists --print-errors $pkg || return
926     pkg_cflags=$($pkg_config --cflags $pkg)
927     pkg_libs=$($pkg_config --libs $pkg)
928     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
929         set_safe ${pkg}_cflags $pkg_cflags   &&
930         set_safe ${pkg}_libs   $pkg_libs
931 }
932
933 check_exec(){
934     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
935 }
936
937 check_exec_crash(){
938     code=$(cat)
939
940     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
941     # are safe but may not be available everywhere.  Thus we use
942     # raise(SIGTERM) instead.  The check is run in a subshell so we
943     # can redirect the "Terminated" message from the shell.  SIGBUS
944     # is not defined by standard C so it is used conditionally.
945
946     (check_exec "$@") >> $logfile 2>&1 <<EOF
947 #include <signal.h>
948 static void sighandler(int sig){
949     raise(SIGTERM);
950 }
951 int foo(void){
952     $code
953 }
954 int (*func_ptr)(void) = foo;
955 int main(void){
956     signal(SIGILL, sighandler);
957     signal(SIGFPE, sighandler);
958     signal(SIGSEGV, sighandler);
959 #ifdef SIGBUS
960     signal(SIGBUS, sighandler);
961 #endif
962     return func_ptr();
963 }
964 EOF
965 }
966
967 check_type(){
968     log check_type "$@"
969     headers=$1
970     type=$2
971     shift 2
972     disable_safe "$type"
973     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
974 }
975
976 check_struct(){
977     log check_struct "$@"
978     headers=$1
979     struct=$2
980     member=$3
981     shift 3
982     disable_safe "${struct}_${member}"
983     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
984         enable_safe "${struct}_${member}"
985 }
986
987 check_builtin(){
988     log check_builtin "$@"
989     name=$1
990     headers=$2
991     builtin=$3
992     shift 3
993     disable "$name"
994     check_code ld "$headers" "$builtin" "$@" && enable "$name"
995 }
996
997 check_compile_assert(){
998     log check_compile_assert "$@"
999     name=$1
1000     headers=$2
1001     condition=$3
1002     shift 3
1003     disable "$name"
1004     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1005 }
1006
1007 require(){
1008     name="$1"
1009     header="$2"
1010     func="$3"
1011     shift 3
1012     check_lib $header $func "$@" || die "ERROR: $name not found"
1013 }
1014
1015 require2(){
1016     name="$1"
1017     headers="$2"
1018     func="$3"
1019     shift 3
1020     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1021 }
1022
1023 require_pkg_config(){
1024     pkg="$1"
1025     check_pkg_config "$@" || die "ERROR: $pkg not found"
1026     add_cflags    $(get_safe ${pkg}_cflags)
1027     add_extralibs $(get_safe ${pkg}_libs)
1028 }
1029
1030 hostcc_e(){
1031     eval printf '%s\\n' $HOSTCC_E
1032 }
1033
1034 hostcc_o(){
1035     eval printf '%s\\n' $HOSTCC_O
1036 }
1037
1038 check_host_cc(){
1039     log check_host_cc "$@"
1040     cat > $TMPC
1041     log_file $TMPC
1042     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1043 }
1044
1045 check_host_cpp(){
1046     log check_host_cpp "$@"
1047     cat > $TMPC
1048     log_file $TMPC
1049     check_cmd $host_cc $HOSTCPPFLAGS $HOSTCFLAGS "$@" $(hostcc_e $TMPO) $TMPC
1050 }
1051
1052 check_host_cppflags(){
1053     log check_host_cppflags "$@"
1054     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1055 int x;
1056 EOF
1057 }
1058
1059 check_host_cflags(){
1060     log check_host_cflags "$@"
1061     set -- $($host_cflags_filter "$@")
1062     check_host_cc "$@" <<EOF && append host_cflags "$@"
1063 int x;
1064 EOF
1065 }
1066
1067 check_host_cpp_condition(){
1068     log check_host_cpp_condition "$@"
1069     header=$1
1070     condition=$2
1071     shift 2
1072     check_host_cpp "$@" <<EOF
1073 #include <$header>
1074 #if !($condition)
1075 #error "unsatisfied condition: $condition"
1076 #endif
1077 EOF
1078 }
1079
1080 apply(){
1081     file=$1
1082     shift
1083     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1084 }
1085
1086 cp_if_changed(){
1087     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1088     mkdir -p "$(dirname $2)"
1089     $cp_f "$1" "$2"
1090 }
1091
1092 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1093 # system-dependent things.
1094
1095 COMPONENT_LIST="
1096     bsfs
1097     decoders
1098     demuxers
1099     encoders
1100     filters
1101     hwaccels
1102     indevs
1103     muxers
1104     outdevs
1105     parsers
1106     protocols
1107 "
1108
1109 EXAMPLE_LIST="
1110     avcodec_example
1111     filter_audio_example
1112     metadata_example
1113     output_example
1114     transcode_aac_example
1115 "
1116
1117 EXTERNAL_LIBRARY_LIST="
1118     avisynth
1119     bzlib
1120     frei0r
1121     gnutls
1122     libcdio
1123     libdc1394
1124     libfaac
1125     libfdk_aac
1126     libfreetype
1127     libgsm
1128     libilbc
1129     libmp3lame
1130     libopencore_amrnb
1131     libopencore_amrwb
1132     libopencv
1133     libopenjpeg
1134     libopus
1135     libpulse
1136     librtmp
1137     libschroedinger
1138     libspeex
1139     libtheora
1140     libvo_aacenc
1141     libvo_amrwbenc
1142     libvorbis
1143     libvpx
1144     libwavpack
1145     libwebp
1146     libx264
1147     libx265
1148     libxavs
1149     libxvid
1150     openssl
1151     x11grab
1152     zlib
1153 "
1154
1155 HWACCEL_LIST="
1156     dxva2
1157     vaapi
1158     vda
1159     vdpau
1160 "
1161 LIBRARY_LIST="
1162     avcodec
1163     avdevice
1164     avfilter
1165     avformat
1166     avresample
1167     avutil
1168     swscale
1169 "
1170
1171 PROGRAM_LIST="
1172     avconv
1173     avplay
1174     avprobe
1175     avserver
1176 "
1177
1178 CONFIG_LIST="
1179     $COMPONENT_LIST
1180     $EXAMPLE_LIST
1181     $EXTERNAL_LIBRARY_LIST
1182     $HWACCEL_LIST
1183     $LIBRARY_LIST
1184     $PROGRAM_LIST
1185     dct
1186     doc
1187     error_resilience
1188     fft
1189     gpl
1190     gray
1191     hardcoded_tables
1192     lsp
1193     lzo
1194     mdct
1195     memalign_hack
1196     neon_clobber_test
1197     network
1198     nonfree
1199     pod2man
1200     pic
1201     rdft
1202     runtime_cpudetect
1203     safe_bitstream_reader
1204     shared
1205     small
1206     sram
1207     static
1208     swscale_alpha
1209     texi2html
1210     thumb
1211     version3
1212     xmm_clobber_test
1213 "
1214
1215 THREADS_LIST='
1216     pthreads
1217     w32threads
1218 '
1219
1220 ATOMICS_LIST='
1221     atomics_gcc
1222     atomics_suncc
1223     atomics_win32
1224 '
1225
1226 ARCH_LIST='
1227     aarch64
1228     alpha
1229     arm
1230     avr32
1231     avr32_ap
1232     avr32_uc
1233     bfin
1234     ia64
1235     m68k
1236     mips
1237     mips64
1238     parisc
1239     ppc
1240     ppc64
1241     s390
1242     sh4
1243     sparc
1244     sparc64
1245     tilegx
1246     tilepro
1247     tomi
1248     x86
1249     x86_32
1250     x86_64
1251 '
1252
1253 ARCH_EXT_LIST_ARM='
1254     armv5te
1255     armv6
1256     armv6t2
1257     neon
1258     vfp
1259     vfpv3
1260 '
1261
1262 ARCH_EXT_LIST_X86_SIMD='
1263     amd3dnow
1264     amd3dnowext
1265     avx
1266     avx2
1267     xop
1268     fma3
1269     fma4
1270     mmx
1271     mmxext
1272     sse
1273     sse2
1274     sse3
1275     sse4
1276     sse42
1277     ssse3
1278 '
1279
1280 ARCH_EXT_LIST_X86="
1281     $ARCH_EXT_LIST_X86_SIMD
1282     cpunop
1283     i686
1284 "
1285
1286 ARCH_EXT_LIST="
1287     $ARCH_EXT_LIST_ARM
1288     $ARCH_EXT_LIST_X86
1289     altivec
1290     ppc4xx
1291     vis
1292 "
1293
1294 HAVE_LIST_CMDLINE='
1295     inline_asm
1296     symver
1297     yasm
1298 '
1299
1300 HAVE_LIST_PUB='
1301     bigendian
1302     fast_unaligned
1303 '
1304
1305 MATH_FUNCS="
1306     atanf
1307     atan2f
1308     cbrtf
1309     cosf
1310     exp2
1311     exp2f
1312     expf
1313     isinf
1314     isnan
1315     ldexpf
1316     llrint
1317     llrintf
1318     log2
1319     log2f
1320     log10f
1321     lrint
1322     lrintf
1323     powf
1324     rint
1325     round
1326     roundf
1327     sinf
1328     trunc
1329     truncf
1330 "
1331
1332 HAVE_LIST="
1333     $ARCH_EXT_LIST
1334     $(add_suffix _external $ARCH_EXT_LIST)
1335     $(add_suffix _inline   $ARCH_EXT_LIST)
1336     $HAVE_LIST_CMDLINE
1337     $HAVE_LIST_PUB
1338     $THREADS_LIST
1339     $ATOMICS_LIST
1340     $MATH_FUNCS
1341     aligned_malloc
1342     aligned_stack
1343     alsa_asoundlib_h
1344     altivec_h
1345     arpa_inet_h
1346     asm_mod_q
1347     atomic_cas_ptr
1348     atomics_native
1349     attribute_may_alias
1350     attribute_packed
1351     cdio_paranoia_h
1352     cdio_paranoia_paranoia_h
1353     closesocket
1354     CommandLineToArgvW
1355     CryptGenRandom
1356     dcbzl
1357     dev_bktr_ioctl_bt848_h
1358     dev_bktr_ioctl_meteor_h
1359     dev_ic_bt8xx_h
1360     dev_video_bktr_ioctl_bt848_h
1361     dev_video_meteor_ioctl_meteor_h
1362     direct_h
1363     dlfcn_h
1364     dlopen
1365     dos_paths
1366     dxva_h
1367     ebp_available
1368     ebx_available
1369     fast_64bit
1370     fast_clz
1371     fast_cmov
1372     fcntl
1373     flt_lim
1374     fork
1375     getaddrinfo
1376     gethrtime
1377     getopt
1378     GetProcessAffinityMask
1379     GetProcessMemoryInfo
1380     GetProcessTimes
1381     GetSystemTimeAsFileTime
1382     getrusage
1383     getservbyport
1384     gettimeofday
1385     gnu_as
1386     gsm_h
1387     ibm_asm
1388     inet_aton
1389     io_h
1390     inline_asm_labels
1391     isatty
1392     jack_port_get_latency_range
1393     ldbrx
1394     libc_msvcrt
1395     libdc1394_1
1396     libdc1394_2
1397     local_aligned_16
1398     local_aligned_8
1399     localtime_r
1400     loongson
1401     mach_absolute_time
1402     mach_mach_time_h
1403     machine_ioctl_bt848_h
1404     machine_ioctl_meteor_h
1405     machine_rw_barrier
1406     malloc_h
1407     MapViewOfFile
1408     memalign
1409     MemoryBarrier
1410     mkstemp
1411     mm_empty
1412     mmap
1413     mprotect
1414     nanosleep
1415     poll_h
1416     posix_memalign
1417     pragma_deprecated
1418     rdtsc
1419     sched_getaffinity
1420     sdl
1421     SetConsoleTextAttribute
1422     setmode
1423     setrlimit
1424     Sleep
1425     sndio_h
1426     socklen_t
1427     soundcard_h
1428     strerror_r
1429     strptime
1430     struct_addrinfo
1431     struct_group_source_req
1432     struct_ip_mreq_source
1433     struct_ipv6_mreq
1434     struct_pollfd
1435     struct_rusage_ru_maxrss
1436     struct_sockaddr_in6
1437     struct_sockaddr_sa_len
1438     struct_sockaddr_storage
1439     struct_v4l2_frmivalenum_discrete
1440     symver_asm_label
1441     symver_gnu_asm
1442     sync_val_compare_and_swap
1443     sysconf
1444     sysctl
1445     sys_mman_h
1446     sys_param_h
1447     sys_resource_h
1448     sys_select_h
1449     sys_soundcard_h
1450     sys_time_h
1451     sys_un_h
1452     sys_videoio_h
1453     threads
1454     unistd_h
1455     usleep
1456     vdpau_x11
1457     vfp_args
1458     VirtualAlloc
1459     windows_h
1460     winsock2_h
1461     xform_asm
1462     xlib
1463     xmm_clobbers
1464 "
1465
1466 # options emitted with CONFIG_ prefix but not available on the command line
1467 CONFIG_EXTRA="
1468     aandcttables
1469     ac3dsp
1470     audio_frame_queue
1471     dsputil
1472     gcrypt
1473     golomb
1474     gplv3
1475     h263dsp
1476     h264chroma
1477     h264dsp
1478     h264pred
1479     h264qpel
1480     hpeldsp
1481     huffman
1482     intrax8
1483     lgplv3
1484     lpc
1485     mpegaudio
1486     mpegaudiodsp
1487     mpegvideo
1488     mpegvideoenc
1489     nettle
1490     rangecoder
1491     riffdec
1492     riffenc
1493     rtpdec
1494     rtpenc_chain
1495     sinewin
1496     videodsp
1497     vp3dsp
1498 "
1499
1500 CMDLINE_SELECT="
1501     $ARCH_EXT_LIST
1502     $CONFIG_LIST
1503     $HAVE_LIST_CMDLINE
1504     $THREADS_LIST
1505     asm
1506     cross_compile
1507     debug
1508     extra_warnings
1509     logging
1510     lto
1511     optimizations
1512 "
1513
1514 PATHS_LIST='
1515     bindir
1516     datadir
1517     docdir
1518     incdir
1519     libdir
1520     mandir
1521     prefix
1522     shlibdir
1523 '
1524
1525 CMDLINE_SET="
1526     $PATHS_LIST
1527     ar
1528     arch
1529     as
1530     build_suffix
1531     cc
1532     cpu
1533     cross_prefix
1534     dep_cc
1535     extra_version
1536     host_cc
1537     host_cflags
1538     host_ld
1539     host_ldflags
1540     host_libs
1541     host_os
1542     ld
1543     logfile
1544     malloc_prefix
1545     nm
1546     optflags
1547     pkg_config
1548     random_seed
1549     samples
1550     sysinclude
1551     sysroot
1552     target_exec
1553     target_os
1554     target_path
1555     target_samples
1556     toolchain
1557 "
1558
1559 CMDLINE_APPEND="
1560     extra_cflags
1561     host_cppflags
1562 "
1563
1564 # code dependency declarations
1565
1566 # architecture extensions
1567
1568 armv5te_deps="arm"
1569 armv6_deps="arm"
1570 armv6t2_deps="arm"
1571 neon_deps_any="aarch64 arm"
1572 vfp_deps_any="aarch64 arm"
1573 vfpv3_deps="vfp"
1574
1575 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1576
1577 altivec_deps="ppc"
1578 ppc4xx_deps="ppc"
1579
1580 vis_deps="sparc"
1581
1582 cpunop_deps="i686"
1583 x86_64_select="i686"
1584 x86_64_suggest="fast_cmov"
1585
1586 amd3dnow_deps="mmx"
1587 amd3dnowext_deps="amd3dnow"
1588 i686_deps="x86"
1589 mmx_deps="x86"
1590 mmxext_deps="mmx"
1591 sse_deps="mmxext"
1592 sse2_deps="sse"
1593 sse3_deps="sse2"
1594 ssse3_deps="sse3"
1595 sse4_deps="ssse3"
1596 sse42_deps="sse4"
1597 avx_deps="sse42"
1598 xop_deps="avx"
1599 fma3_deps="avx"
1600 fma4_deps="avx"
1601 avx2_deps="avx"
1602
1603 mmx_external_deps="yasm"
1604 mmx_inline_deps="inline_asm"
1605 mmx_suggest="mmx_external mmx_inline"
1606
1607 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1608     eval dep=\$${ext}_deps
1609     eval ${ext}_external_deps='"${dep}_external"'
1610     eval ${ext}_inline_deps='"${dep}_inline"'
1611     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1612 done
1613
1614 aligned_stack_if_any="aarch64 ppc x86"
1615 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1616 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1617 fast_unaligned_if_any="aarch64 ppc x86"
1618
1619 need_memalign="altivec neon sse"
1620
1621 # system capabilities
1622 log2_deps="!libc_msvcrt"
1623
1624 symver_if_any="symver_asm_label symver_gnu_asm"
1625
1626 # threading support
1627 atomics_gcc_if="sync_val_compare_and_swap"
1628 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1629 atomics_win32_if="MemoryBarrier"
1630 atomics_native_if_any="$ATOMICS_LIST"
1631 w32threads_deps="atomics_native"
1632 threads_if_any="$THREADS_LIST"
1633
1634 # subsystems
1635 dct_select="rdft"
1636 error_resilience_select="dsputil"
1637 lpc_select="dsputil"
1638 mdct_select="fft"
1639 rdft_select="fft"
1640 mpegaudio_select="mpegaudiodsp"
1641 mpegaudiodsp_select="dct"
1642 mpegvideo_select="dsputil hpeldsp videodsp"
1643 mpegvideoenc_select="mpegvideo"
1644
1645 # decoders / encoders
1646 aac_decoder_select="mdct sinewin"
1647 aac_encoder_select="audio_frame_queue mdct sinewin"
1648 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1649 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1650 ac3_encoder_select="mdct ac3dsp dsputil"
1651 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1652 aic_decoder_select="dsputil golomb"
1653 alac_encoder_select="lpc"
1654 als_decoder_select="dsputil"
1655 amrnb_decoder_select="lsp"
1656 amrwb_decoder_select="lsp"
1657 amv_decoder_select="sp5x_decoder"
1658 ape_decoder_select="dsputil"
1659 asv1_decoder_select="dsputil"
1660 asv1_encoder_select="dsputil"
1661 asv2_decoder_select="dsputil"
1662 asv2_encoder_select="dsputil"
1663 atrac1_decoder_select="mdct sinewin"
1664 atrac3_decoder_select="mdct"
1665 atrac3p_decoder_select="mdct sinewin"
1666 bink_decoder_select="dsputil hpeldsp"
1667 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
1668 binkaudio_rdft_decoder_select="mdct rdft sinewin"
1669 cavs_decoder_select="dsputil golomb h264chroma videodsp"
1670 cllc_decoder_select="dsputil"
1671 comfortnoise_encoder_select="lpc"
1672 cook_decoder_select="dsputil mdct sinewin"
1673 cscd_decoder_select="lzo"
1674 cscd_decoder_suggest="zlib"
1675 dca_decoder_select="mdct"
1676 dnxhd_decoder_select="dsputil"
1677 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
1678 dvvideo_decoder_select="dsputil"
1679 dvvideo_encoder_select="dsputil"
1680 dxa_decoder_deps="zlib"
1681 eac3_decoder_select="ac3_decoder"
1682 eac3_encoder_select="ac3_encoder"
1683 eamad_decoder_select="aandcttables dsputil mpegvideo"
1684 eatgq_decoder_select="aandcttables dsputil"
1685 eatqi_decoder_select="aandcttables error_resilience mpegvideo"
1686 ffv1_decoder_select="dsputil golomb rangecoder"
1687 ffv1_encoder_select="dsputil rangecoder"
1688 ffvhuff_decoder_select="huffyuv_decoder"
1689 ffvhuff_encoder_select="huffyuv_encoder"
1690 fic_decoder_select="dsputil golomb"
1691 flac_decoder_select="golomb"
1692 flac_encoder_select="dsputil golomb lpc"
1693 flashsv_decoder_deps="zlib"
1694 flashsv_encoder_deps="zlib"
1695 flashsv2_decoder_deps="zlib"
1696 flv_decoder_select="h263_decoder"
1697 flv_encoder_select="h263_encoder"
1698 fourxm_decoder_select="dsputil"
1699 fraps_decoder_select="dsputil huffman"
1700 g2m_decoder_deps="zlib"
1701 g2m_decoder_select="dsputil"
1702 h261_decoder_select="error_resilience mpegvideo"
1703 h261_encoder_select="aandcttables mpegvideoenc"
1704 h263_decoder_select="error_resilience h263_parser h263dsp mpegvideo"
1705 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1706 h263i_decoder_select="h263_decoder"
1707 h263p_encoder_select="h263_encoder"
1708 h264_decoder_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1709 h264_decoder_suggest="error_resilience"
1710 hevc_decoder_select="dsputil golomb videodsp"
1711 huffyuv_decoder_select="dsputil"
1712 huffyuv_encoder_select="dsputil huffman"
1713 iac_decoder_select="imc_decoder"
1714 imc_decoder_select="dsputil fft mdct sinewin"
1715 indeo3_decoder_select="hpeldsp"
1716 interplay_video_decoder_select="hpeldsp"
1717 jpegls_decoder_select="golomb mjpeg_decoder"
1718 jpegls_encoder_select="golomb"
1719 jv_decoder_select="dsputil"
1720 lagarith_decoder_select="dsputil"
1721 ljpeg_encoder_select="aandcttables mpegvideoenc"
1722 loco_decoder_select="golomb"
1723 mdec_decoder_select="dsputil error_resilience mpegvideo"
1724 metasound_decoder_select="lsp mdct sinewin"
1725 mimic_decoder_select="dsputil hpeldsp"
1726 mjpeg_decoder_select="dsputil hpeldsp"
1727 mjpegb_decoder_select="mjpeg_decoder"
1728 mjpeg_encoder_select="aandcttables dsputil mpegvideoenc"
1729 mlp_decoder_select="dsputil mlp_parser"
1730 motionpixels_decoder_select="dsputil"
1731 mp1_decoder_select="mpegaudio"
1732 mp1float_decoder_select="mpegaudio"
1733 mp2_decoder_select="mpegaudio"
1734 mp2float_decoder_select="mpegaudio"
1735 mp3_decoder_select="mpegaudio"
1736 mp3adu_decoder_select="mpegaudio"
1737 mp3adufloat_decoder_select="mpegaudio"
1738 mp3float_decoder_select="mpegaudio"
1739 mp3on4_decoder_select="mpegaudio"
1740 mp3on4float_decoder_select="mpegaudio"
1741 mpc7_decoder_select="dsputil mpegaudiodsp"
1742 mpc8_decoder_select="dsputil mpegaudiodsp"
1743 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1744 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1745 mpeg1video_decoder_select="error_resilience mpegvideo"
1746 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1747 mpeg2video_decoder_select="error_resilience mpegvideo"
1748 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1749 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1750 mpeg4_encoder_select="h263_encoder"
1751 msmpeg4v1_decoder_select="h263_decoder"
1752 msmpeg4v2_decoder_select="h263_decoder"
1753 msmpeg4v2_encoder_select="h263_encoder"
1754 msmpeg4v3_decoder_select="h263_decoder"
1755 msmpeg4v3_encoder_select="h263_encoder"
1756 mss2_decoder_select="error_resilience vc1_decoder"
1757 mxpeg_decoder_select="mjpeg_decoder"
1758 nellymoser_decoder_select="mdct sinewin"
1759 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1760 nuv_decoder_select="dsputil lzo"
1761 png_decoder_deps="zlib"
1762 png_decoder_select="dsputil"
1763 png_encoder_deps="zlib"
1764 png_encoder_select="dsputil"
1765 prores_decoder_select="dsputil"
1766 prores_encoder_select="dsputil"
1767 qcelp_decoder_select="lsp"
1768 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1769 ra_144_encoder_select="audio_frame_queue lpc"
1770 ralf_decoder_select="golomb"
1771 rv10_decoder_select="error_resilience h263_decoder h263dsp"
1772 rv10_encoder_select="h263_encoder"
1773 rv20_decoder_select="error_resilience h263_decoder h263dsp"
1774 rv20_encoder_select="h263_encoder"
1775 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1776 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1777 shorten_decoder_select="golomb"
1778 sipr_decoder_select="lsp"
1779 sp5x_decoder_select="mjpeg_decoder"
1780 svq1_decoder_select="hpeldsp"
1781 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
1782 svq3_decoder_select="h264_decoder hpeldsp mpegvideo"
1783 svq3_decoder_suggest="zlib"
1784 tak_decoder_select="dsputil"
1785 theora_decoder_select="vp3_decoder"
1786 tiff_decoder_suggest="zlib"
1787 tiff_encoder_suggest="zlib"
1788 thp_decoder_select="mjpeg_decoder"
1789 truehd_decoder_select="mlp_decoder"
1790 truemotion2_decoder_select="dsputil"
1791 truespeech_decoder_select="dsputil"
1792 tscc_decoder_deps="zlib"
1793 twinvq_decoder_select="mdct lsp sinewin"
1794 utvideo_decoder_select="dsputil"
1795 utvideo_encoder_select="dsputil huffman"
1796 vble_decoder_select="dsputil"
1797 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel intrax8"
1798 vc1image_decoder_select="vc1_decoder"
1799 vorbis_decoder_select="mdct"
1800 vorbis_encoder_select="mdct"
1801 vp3_decoder_select="hpeldsp vp3dsp videodsp"
1802 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
1803 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
1804 vp6a_decoder_select="vp6_decoder"
1805 vp6f_decoder_select="vp6_decoder"
1806 vp8_decoder_select="h264pred videodsp"
1807 vp9_decoder_select="videodsp"
1808 webp_decoder_select="vp8_decoder"
1809 wmapro_decoder_select="mdct sinewin"
1810 wmav1_decoder_select="mdct sinewin"
1811 wmav1_encoder_select="mdct sinewin"
1812 wmav2_decoder_select="mdct sinewin"
1813 wmav2_encoder_select="mdct sinewin"
1814 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
1815 wmv1_decoder_select="h263_decoder"
1816 wmv1_encoder_select="h263_encoder"
1817 wmv2_decoder_select="h263_decoder intrax8 videodsp"
1818 wmv2_encoder_select="h263_encoder"
1819 wmv3_decoder_select="vc1_decoder"
1820 wmv3image_decoder_select="wmv3_decoder"
1821 zerocodec_decoder_deps="zlib"
1822 zlib_decoder_deps="zlib"
1823 zlib_encoder_deps="zlib"
1824 zmbv_decoder_deps="zlib"
1825 zmbv_encoder_deps="zlib"
1826
1827 # hardware accelerators
1828 dxva2_deps="dxva2api_h"
1829 vaapi_deps="va_va_h"
1830 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
1831 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
1832 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
1833
1834 h263_vaapi_hwaccel_deps="vaapi"
1835 h263_vaapi_hwaccel_select="h263_decoder"
1836 h263_vdpau_hwaccel_deps="vdpau"
1837 h263_vdpau_hwaccel_select="h263_decoder"
1838 h264_dxva2_hwaccel_deps="dxva2"
1839 h264_dxva2_hwaccel_select="h264_decoder"
1840 h264_vaapi_hwaccel_deps="vaapi"
1841 h264_vaapi_hwaccel_select="h264_decoder"
1842 h264_vda_hwaccel_deps="vda"
1843 h264_vda_hwaccel_select="h264_decoder"
1844 h264_vdpau_hwaccel_deps="vdpau"
1845 h264_vdpau_hwaccel_select="h264_decoder"
1846 mpeg1_vdpau_hwaccel_deps="vdpau"
1847 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
1848 mpeg2_dxva2_hwaccel_deps="dxva2"
1849 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
1850 mpeg2_vaapi_hwaccel_deps="vaapi"
1851 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
1852 mpeg2_vdpau_hwaccel_deps="vdpau"
1853 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
1854 mpeg4_vaapi_hwaccel_deps="vaapi"
1855 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
1856 mpeg4_vdpau_hwaccel_deps="vdpau"
1857 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
1858 vc1_dxva2_hwaccel_deps="dxva2"
1859 vc1_dxva2_hwaccel_select="vc1_decoder"
1860 vc1_vaapi_hwaccel_deps="vaapi"
1861 vc1_vaapi_hwaccel_select="vc1_decoder"
1862 vc1_vdpau_hwaccel_deps="vdpau"
1863 vc1_vdpau_hwaccel_select="vc1_decoder"
1864 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
1865 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
1866 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
1867
1868 # parsers
1869 h264_parser_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1870 mpeg4video_parser_select="error_resilience h263dsp mpegvideo"
1871 mpegvideo_parser_select="error_resilience mpegvideo"
1872 vc1_parser_select="mpegvideo"
1873
1874 # external libraries
1875 libfaac_encoder_deps="libfaac"
1876 libfaac_encoder_select="audio_frame_queue"
1877 libfdk_aac_decoder_deps="libfdk_aac"
1878 libfdk_aac_encoder_deps="libfdk_aac"
1879 libfdk_aac_encoder_select="audio_frame_queue"
1880 libgsm_decoder_deps="libgsm"
1881 libgsm_encoder_deps="libgsm"
1882 libgsm_ms_decoder_deps="libgsm"
1883 libgsm_ms_encoder_deps="libgsm"
1884 libilbc_decoder_deps="libilbc"
1885 libilbc_encoder_deps="libilbc"
1886 libmp3lame_encoder_deps="libmp3lame"
1887 libmp3lame_encoder_select="audio_frame_queue"
1888 libopencore_amrnb_decoder_deps="libopencore_amrnb"
1889 libopencore_amrnb_encoder_deps="libopencore_amrnb"
1890 libopencore_amrnb_encoder_select="audio_frame_queue"
1891 libopencore_amrwb_decoder_deps="libopencore_amrwb"
1892 libopenjpeg_decoder_deps="libopenjpeg"
1893 libopenjpeg_encoder_deps="libopenjpeg"
1894 libopus_decoder_deps="libopus"
1895 libopus_encoder_deps="libopus"
1896 libopus_encoder_select="audio_frame_queue"
1897 libschroedinger_decoder_deps="libschroedinger"
1898 libschroedinger_encoder_deps="libschroedinger"
1899 libspeex_decoder_deps="libspeex"
1900 libspeex_encoder_deps="libspeex"
1901 libspeex_encoder_select="audio_frame_queue"
1902 libtheora_encoder_deps="libtheora"
1903 libvo_aacenc_encoder_deps="libvo_aacenc"
1904 libvo_aacenc_encoder_select="audio_frame_queue"
1905 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
1906 libvorbis_encoder_deps="libvorbis"
1907 libvorbis_encoder_select="audio_frame_queue"
1908 libvpx_vp8_decoder_deps="libvpx"
1909 libvpx_vp8_encoder_deps="libvpx"
1910 libvpx_vp9_decoder_deps="libvpx"
1911 libvpx_vp9_encoder_deps="libvpx"
1912 libwavpack_encoder_deps="libwavpack"
1913 libwebp_encoder_deps="libwebp"
1914 libx264_encoder_deps="libx264"
1915 libx265_encoder_deps="libx265"
1916 libxavs_encoder_deps="libxavs"
1917 libxvid_encoder_deps="libxvid"
1918
1919 # demuxers / muxers
1920 ac3_demuxer_select="ac3_parser"
1921 asf_demuxer_select="riffdec"
1922 asf_muxer_select="riffenc"
1923 asf_stream_muxer_select="asf_muxer"
1924 avi_demuxer_select="riffdec"
1925 avi_muxer_select="riffenc"
1926 avisynth_demuxer_deps="avisynth"
1927 avisynth_demuxer_select="riffdec"
1928 caf_demuxer_select="riffdec"
1929 dirac_demuxer_select="dirac_parser"
1930 dxa_demuxer_select="riffdec"
1931 eac3_demuxer_select="ac3_parser"
1932 f4v_muxer_select="mov_muxer"
1933 flac_demuxer_select="flac_parser"
1934 hds_muxer_select="flv_muxer"
1935 hls_muxer_select="mpegts_muxer"
1936 ipod_muxer_select="mov_muxer"
1937 ismv_muxer_select="mov_muxer"
1938 matroska_audio_muxer_select="matroska_muxer"
1939 matroska_demuxer_select="riffdec"
1940 matroska_demuxer_suggest="bzlib lzo zlib"
1941 matroska_muxer_select="riffenc"
1942 mmf_muxer_select="riffenc"
1943 mov_demuxer_select="riffdec"
1944 mov_demuxer_suggest="zlib"
1945 mov_muxer_select="riffenc rtpenc_chain"
1946 mp3_demuxer_select="mpegaudio_parser"
1947 mp4_muxer_select="mov_muxer"
1948 mpegts_muxer_select="adts_muxer latm_muxer"
1949 mpegtsraw_demuxer_select="mpegts_demuxer"
1950 mxf_d10_muxer_select="mxf_muxer"
1951 nut_muxer_select="riffenc"
1952 nuv_demuxer_select="riffdec"
1953 ogg_demuxer_select="golomb"
1954 psp_muxer_select="mov_muxer"
1955 rtp_demuxer_select="sdp_demuxer"
1956 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
1957 rtsp_demuxer_select="http_protocol rtpdec"
1958 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
1959 sap_demuxer_select="sdp_demuxer"
1960 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
1961 sdp_demuxer_select="rtpdec"
1962 smoothstreaming_muxer_select="ismv_muxer"
1963 spdif_muxer_select="aac_parser"
1964 tak_demuxer_select="tak_parser"
1965 tg2_muxer_select="mov_muxer"
1966 tgp_muxer_select="mov_muxer"
1967 w64_demuxer_select="wav_demuxer"
1968 wav_demuxer_select="riffdec"
1969 wav_muxer_select="riffenc"
1970 webm_muxer_select="riffenc"
1971 wtv_demuxer_select="riffdec"
1972 xmv_demuxer_select="riffdec"
1973 xwma_demuxer_select="riffdec"
1974
1975 # indevs / outdevs
1976 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
1977 alsa_outdev_deps="alsa_asoundlib_h"
1978 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
1979 dv1394_indev_deps="dv1394"
1980 dv1394_indev_select="dv_demuxer"
1981 fbdev_indev_deps="linux_fb_h"
1982 jack_indev_deps="jack_jack_h pthreads"
1983 libcdio_indev_deps="libcdio"
1984 libdc1394_indev_deps="libdc1394"
1985 oss_indev_deps_any="soundcard_h sys_soundcard_h"
1986 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
1987 pulse_indev_deps="libpulse"
1988 sndio_indev_deps="sndio_h"
1989 sndio_outdev_deps="sndio_h"
1990 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
1991 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
1992 vfwcap_indev_extralibs="-lavicap32"
1993 x11grab_indev_deps="x11grab XShmCreateImage"
1994
1995 # protocols
1996 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
1997 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
1998 ffrtmpcrypt_protocol_select="tcp_protocol"
1999 ffrtmphttp_protocol_deps="!librtmp_protocol"
2000 ffrtmphttp_protocol_select="http_protocol"
2001 gopher_protocol_select="network"
2002 httpproxy_protocol_select="tcp_protocol"
2003 http_protocol_select="tcp_protocol"
2004 https_protocol_select="tls_protocol"
2005 librtmp_protocol_deps="librtmp"
2006 librtmpe_protocol_deps="librtmp"
2007 librtmps_protocol_deps="librtmp"
2008 librtmpt_protocol_deps="librtmp"
2009 librtmpte_protocol_deps="librtmp"
2010 mmsh_protocol_select="http_protocol"
2011 mmst_protocol_select="network"
2012 rtmp_protocol_deps="!librtmp_protocol"
2013 rtmp_protocol_select="tcp_protocol"
2014 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2015 rtmps_protocol_deps="!librtmp_protocol"
2016 rtmps_protocol_select="tls_protocol"
2017 rtmpt_protocol_select="ffrtmphttp_protocol"
2018 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2019 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2020 rtp_protocol_select="udp_protocol"
2021 sctp_protocol_deps="struct_sctp_event_subscribe"
2022 sctp_protocol_select="network"
2023 srtp_protocol_select="rtp_protocol"
2024 tcp_protocol_select="network"
2025 tls_protocol_deps_any="openssl gnutls"
2026 tls_protocol_select="tcp_protocol"
2027 udp_protocol_select="network"
2028 unix_protocol_deps="sys_un_h"
2029 unix_protocol_select="network"
2030
2031 # filters
2032 blackframe_filter_deps="gpl"
2033 boxblur_filter_deps="gpl"
2034 cropdetect_filter_deps="gpl"
2035 delogo_filter_deps="gpl"
2036 drawtext_filter_deps="libfreetype"
2037 frei0r_filter_deps="frei0r dlopen"
2038 frei0r_filter_extralibs='$ldl'
2039 frei0r_src_filter_deps="frei0r dlopen"
2040 frei0r_src_filter_extralibs='$ldl'
2041 hqdn3d_filter_deps="gpl"
2042 interlace_filter_deps="gpl"
2043 resample_filter_deps="avresample"
2044 ocv_filter_deps="libopencv"
2045 scale_filter_deps="swscale"
2046
2047 # examples
2048 avcodec_example_deps="avcodec avutil"
2049 filter_audio_example_deps="avfilter avutil"
2050 metadata_example_deps="avformat avutil"
2051 output_example_deps="avcodec avformat avutil swscale"
2052 transcode_aac_example_deps="avcodec avformat avresample"
2053
2054 # libraries
2055 avcodec_deps="avutil"
2056 avdevice_deps="avutil avcodec avformat"
2057 avfilter_deps="avutil"
2058 avformat_deps="avutil avcodec"
2059 avresample_deps="avutil"
2060 swscale_deps="avutil"
2061
2062 # programs
2063 avconv_deps="avcodec avfilter avformat avresample swscale"
2064 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2065                fps_filter null_filter resample_filter scale_filter
2066                setpts_filter trim_filter"
2067 avplay_deps="avcodec avformat avresample swscale sdl"
2068 avplay_libs='$sdl_libs'
2069 avplay_select="rdft"
2070 avprobe_deps="avcodec avformat"
2071 avserver_deps="avformat fork !shared"
2072 avserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2073
2074 # documentation
2075 pod2man_deps="doc"
2076 texi2html_deps="doc"
2077
2078 # default parameters
2079
2080 logfile="config.log"
2081
2082 # installation paths
2083 prefix_default="/usr/local"
2084 bindir_default='${prefix}/bin'
2085 datadir_default='${prefix}/share/avconv'
2086 docdir_default='${prefix}/share/doc/libav'
2087 incdir_default='${prefix}/include'
2088 libdir_default='${prefix}/lib'
2089 mandir_default='${prefix}/share/man'
2090 shlibdir_default="$libdir_default"
2091
2092 # toolchain
2093 ar_default="ar"
2094 cc_default="gcc"
2095 host_cc_default="gcc"
2096 cp_f="cp -f"
2097 ln_s="ln -s -f"
2098 nm_default="nm -g"
2099 objformat="elf"
2100 pkg_config_default=pkg-config
2101 ranlib="ranlib"
2102 strip="strip"
2103 yasmexe="yasm"
2104
2105 nogas=":"
2106
2107 # machine
2108 arch_default=$(uname -m)
2109 cpu="generic"
2110
2111 # OS
2112 target_os_default=$(tolower $(uname -s))
2113 host_os=$target_os_default
2114
2115 # configurable options
2116 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2117
2118 enable asm
2119 enable debug
2120 enable doc
2121 enable optimizations
2122 enable safe_bitstream_reader
2123 enable static
2124 enable swscale_alpha
2125
2126 # By default, enable only those hwaccels that have no external dependencies.
2127 enable dxva2 vdpau
2128
2129 # build settings
2130 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2131 LIBPREF="lib"
2132 LIBSUF=".a"
2133 FULLNAME='$(NAME)$(BUILDSUF)'
2134 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2135 SLIBPREF="lib"
2136 SLIBSUF=".so"
2137 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2138 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2139 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2140 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2141 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2142 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2143
2144 asflags_filter=echo
2145 cflags_filter=echo
2146 ldflags_filter=echo
2147
2148 AS_C='-c'
2149 AS_O='-o $@'
2150 CC_C='-c'
2151 CC_E='-E -o $@'
2152 CC_O='-o $@'
2153 LD_O='-o $@'
2154 LD_LIB='-l%'
2155 LD_PATH='-L'
2156 HOSTCC_C='-c'
2157 HOSTCC_E='-E -o $@'
2158 HOSTCC_O='-o $@'
2159 HOSTLD_O='-o $@'
2160
2161 host_libs='-lm'
2162 host_cflags_filter=echo
2163 host_ldflags_filter=echo
2164
2165 target_path='$(CURDIR)'
2166
2167 # since the object filename is not given with the -MM flag, the compiler
2168 # is only able to print the basename, and we must add the path ourselves
2169 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2170 DEPFLAGS='-MM'
2171
2172 # find source path
2173 if test -f configure; then
2174     source_path=.
2175 else
2176     source_path=$(cd $(dirname "$0"); pwd)
2177     echo "$source_path" | grep -q '[[:blank:]]' &&
2178         die "Out of tree builds are impossible with whitespace in source path."
2179     test -e "$source_path/config.h" &&
2180         die "Out of tree builds are impossible with config.h in source dir."
2181 fi
2182
2183 for v in "$@"; do
2184     r=${v#*=}
2185     l=${v%"$r"}
2186     r=$(sh_quote "$r")
2187     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2188 done
2189
2190 find_things(){
2191     thing=$1
2192     pattern=$2
2193     file=$source_path/$3
2194     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2195 }
2196
2197 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2198 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2199 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2200 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2201 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2202 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2203 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2204 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2205 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2206 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2207 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2208
2209 ALL_COMPONENTS="
2210     $BSF_LIST
2211     $DECODER_LIST
2212     $DEMUXER_LIST
2213     $ENCODER_LIST
2214     $FILTER_LIST
2215     $HWACCEL_LIST
2216     $INDEV_LIST
2217     $MUXER_LIST
2218     $OUTDEV_LIST
2219     $PARSER_LIST
2220     $PROTOCOL_LIST
2221 "
2222
2223 for n in $COMPONENT_LIST; do
2224     v=$(toupper ${n%s})_LIST
2225     eval enable \$$v
2226     eval ${n}_if_any="\$$v"
2227 done
2228
2229 enable $ARCH_EXT_LIST
2230
2231 die_unknown(){
2232     echo "Unknown option \"$1\"."
2233     echo "See $0 --help for available options."
2234     exit 1
2235 }
2236
2237 print_3_columns() {
2238     cat | tr ' ' '\n' | sort | pr -r -3 -t
2239 }
2240
2241 show_list() {
2242     suffix=_$1
2243     shift
2244     echo $* | sed s/$suffix//g | print_3_columns
2245     exit 0
2246 }
2247
2248 rand_list(){
2249     IFS=', '
2250     set -- $*
2251     unset IFS
2252     for thing; do
2253         comp=${thing%:*}
2254         prob=${thing#$comp}
2255         prob=${prob#:}
2256         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2257         echo "prob ${prob:-0.5}"
2258         printf '%s\n' $comp
2259     done
2260 }
2261
2262 do_random(){
2263     action=$1
2264     shift
2265     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2266     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2267 }
2268
2269 for opt do
2270     optval="${opt#*=}"
2271     case "$opt" in
2272         --extra-ldflags=*)
2273             add_ldflags $optval
2274         ;;
2275         --extra-libs=*)
2276             add_extralibs $optval
2277         ;;
2278         --disable-devices)
2279             disable $INDEV_LIST $OUTDEV_LIST
2280         ;;
2281         --enable-debug=*)
2282             debuglevel="$optval"
2283         ;;
2284         --disable-programs)
2285             disable $PROGRAM_LIST
2286         ;;
2287         --disable-everything)
2288             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2289         ;;
2290         --disable-all)
2291             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2292             disable $LIBRARY_LIST $PROGRAM_LIST doc
2293         ;;
2294         --enable-random|--disable-random)
2295             action=${opt%%-random}
2296             do_random ${action#--} $COMPONENT_LIST
2297         ;;
2298         --enable-random=*|--disable-random=*)
2299             action=${opt%%-random=*}
2300             do_random ${action#--} $optval
2301         ;;
2302         --enable-*=*|--disable-*=*)
2303             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2304             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2305             eval list=\$$(toupper $thing)_LIST
2306             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2307             $action $(filter "$name" $list)
2308         ;;
2309         --enable-?*|--disable-?*)
2310             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2311             if is_in $option $COMPONENT_LIST; then
2312                 test $action = disable && action=unset
2313                 eval $action \$$(toupper ${option%s})_LIST
2314             elif is_in $option $CMDLINE_SELECT; then
2315                 $action $option
2316             else
2317                 die_unknown $opt
2318             fi
2319         ;;
2320         --list-*)
2321             NAME="${opt#--list-}"
2322             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2323             NAME=${NAME%s}
2324             eval show_list $NAME \$$(toupper $NAME)_LIST
2325         ;;
2326         --help|-h) show_help
2327         ;;
2328         *)
2329             optname="${opt%%=*}"
2330             optname="${optname#--}"
2331             optname=$(echo "$optname" | sed 's/-/_/g')
2332             if is_in $optname $CMDLINE_SET; then
2333                 eval $optname='$optval'
2334             elif is_in $optname $CMDLINE_APPEND; then
2335                 append $optname "$optval"
2336             else
2337                 die_unknown $opt
2338             fi
2339         ;;
2340     esac
2341 done
2342
2343 disabled logging && logfile=/dev/null
2344
2345 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2346 set >> $logfile
2347
2348 test -n "$cross_prefix" && enable cross_compile
2349
2350 if enabled cross_compile; then
2351     test -n "$arch" && test -n "$target_os" ||
2352         die "Must specify target arch and OS when cross-compiling"
2353 fi
2354
2355 ar_default="${cross_prefix}${ar_default}"
2356 cc_default="${cross_prefix}${cc_default}"
2357 nm_default="${cross_prefix}${nm_default}"
2358 pkg_config_default="${cross_prefix}${pkg_config_default}"
2359 ranlib="${cross_prefix}${ranlib}"
2360 strip="${cross_prefix}${strip}"
2361
2362 sysinclude_default="${sysroot}/usr/include"
2363
2364 case "$toolchain" in
2365     clang-asan)
2366         cc_default="clang"
2367         add_cflags  -fsanitize=address
2368         add_ldflags -fsanitize=address
2369     ;;
2370     clang-tsan)
2371         cc_default="clang"
2372         add_cflags  -fsanitize=thread -pie
2373         add_ldflags -fsanitize=thread -pie
2374     ;;
2375     clang-usan)
2376         cc_default="clang"
2377         add_cflags  -fsanitize=undefined
2378         add_ldflags -fsanitize=undefined
2379     ;;
2380     gcc-asan)
2381         cc_default="gcc"
2382         add_cflags  -fsanitize=address
2383         add_ldflags -fsanitize=address
2384     ;;
2385     gcc-tsan)
2386         cc_default="gcc"
2387         add_cflags  -fsanitize=thread -pie -fPIC
2388         add_ldflags -fsanitize=thread -pie -fPIC
2389     ;;
2390     gcc-usan)
2391         cc_default="gcc"
2392         add_cflags  -fsanitize=undefined
2393         add_ldflags -fsanitize=undefined
2394     ;;
2395     valgrind-massif)
2396         target_exec_default="valgrind"
2397         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2398     ;;
2399     valgrind-memcheck)
2400         target_exec_default="valgrind"
2401         target_exec_args="--track-origins=yes --leak-check=full"
2402     ;;
2403     msvc)
2404         # Check whether the current MSVC version needs the C99 converter.
2405         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2406         # support enough of C99 to build libav. Default to the new
2407         # behaviour if the regexp was unable to match anything, since this
2408         # successfully parses the version number of existing supported
2409         # versions that require the converter (MSVC 2010 and 2012).
2410         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2411         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2412             cc_default="cl"
2413         else
2414             cc_default="c99wrap cl"
2415         fi
2416         ld_default="link"
2417         nm_default="dumpbin -symbols"
2418         ar_default="lib"
2419         target_os_default="win32"
2420         # Use a relative path for TMPDIR. This makes sure all the
2421         # ffconf temp files are written with a relative path, avoiding
2422         # issues with msys/win32 path conversion for MSVC parameters
2423         # such as -Fo<file> or -out:<file>.
2424         TMPDIR=.
2425     ;;
2426     icl)
2427         cc_default="icl"
2428         ld_default="xilink"
2429         nm_default="dumpbin -symbols"
2430         ar_default="xilib"
2431         target_os_default="win32"
2432         TMPDIR=.
2433     ;;
2434     gcov)
2435         add_cflags  -fprofile-arcs -ftest-coverage
2436         add_ldflags -fprofile-arcs -ftest-coverage
2437     ;;
2438     hardened)
2439         add_cflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2440         add_ldflags -Wl,-z,relro -Wl,-z,now
2441     ;;
2442     ?*)
2443         die "Unknown toolchain $toolchain"
2444     ;;
2445 esac
2446
2447 set_default arch cc pkg_config sysinclude target_exec target_os
2448 enabled cross_compile || host_cc_default=$cc
2449 set_default host_cc
2450
2451 if ! $pkg_config --version >/dev/null 2>&1; then
2452     warn "$pkg_config not found, library detection may fail."
2453     pkg_config=false
2454 fi
2455
2456 exesuf() {
2457     case $1 in
2458         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2459     esac
2460 }
2461
2462 EXESUF=$(exesuf $target_os)
2463 HOSTEXESUF=$(exesuf $host_os)
2464
2465 # set temporary file name
2466 : ${TMPDIR:=$TEMPDIR}
2467 : ${TMPDIR:=$TMP}
2468 : ${TMPDIR:=/tmp}
2469
2470 if ! check_cmd mktemp -u XXXXXX; then
2471     # simple replacement for missing mktemp
2472     # NOT SAFE FOR GENERAL USE
2473     mktemp(){
2474         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2475     }
2476 fi
2477
2478 tmpfile(){
2479     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2480         (set -C; exec > $tmp) 2>/dev/null ||
2481         die "Unable to create temporary file in $TMPDIR."
2482     append TMPFILES $tmp
2483     eval $1=$tmp
2484 }
2485
2486 trap 'rm -f -- $TMPFILES' EXIT
2487
2488 tmpfile TMPASM .asm
2489 tmpfile TMPC   .c
2490 tmpfile TMPE   $EXESUF
2491 tmpfile TMPH   .h
2492 tmpfile TMPO   .o
2493 tmpfile TMPS   .S
2494 tmpfile TMPSH  .sh
2495 tmpfile TMPV   .ver
2496
2497 unset -f mktemp
2498
2499 chmod +x $TMPE
2500
2501 # make sure we can execute files in $TMPDIR
2502 cat > $TMPSH 2>> $logfile <<EOF
2503 #! /bin/sh
2504 EOF
2505 chmod +x $TMPSH >> $logfile 2>&1
2506 if ! $TMPSH >> $logfile 2>&1; then
2507     cat <<EOF
2508 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2509 variable to another directory and make sure that it is not mounted noexec.
2510 EOF
2511     die "Sanity test failed."
2512 fi
2513
2514 ccc_flags(){
2515     for flag; do
2516         case $flag in
2517             -std=c99)           echo -c99                       ;;
2518             -mcpu=*)            echo -arch ${flag#*=}           ;;
2519             -mieee)             echo -ieee                      ;;
2520             -O*|-fast)          echo $flag                      ;;
2521             -fno-math-errno)    echo -assume nomath_errno       ;;
2522             -g)                 echo -g3                        ;;
2523             -Wall)              echo -msg_enable level2         ;;
2524             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2525             -Wl,*)              echo $flag                      ;;
2526             -f*|-W*)                                            ;;
2527             *)                  echo $flag                      ;;
2528         esac
2529    done
2530 }
2531
2532 cparser_flags(){
2533     for flag; do
2534         case $flag in
2535             -Wno-switch)             echo -Wno-switch-enum ;;
2536             -Wno-format-zero-length) ;;
2537             -Wdisabled-optimization) ;;
2538             -Wno-pointer-sign)       echo -Wno-other ;;
2539             *)                       echo $flag ;;
2540         esac
2541     done
2542 }
2543
2544 msvc_common_flags(){
2545     for flag; do
2546         case $flag in
2547             # In addition to specifying certain flags under the compiler
2548             # specific filters, they must be specified here as well or else the
2549             # generic catch all at the bottom will print the original flag.
2550             -Wall)                ;;
2551             -std=c99)             ;;
2552             # Common flags
2553             -fomit-frame-pointer) ;;
2554             -g)                   echo -Z7 ;;
2555             -fno-math-errno)      ;;
2556             -fno-common)          ;;
2557             -fno-signed-zeros)    ;;
2558             -fPIC)                ;;
2559             -mthumb)              ;;
2560             -march=*)             ;;
2561             -lz)                  echo zlib.lib ;;
2562             -lavifil32)           echo vfw32.lib ;;
2563             -lavicap32)           echo vfw32.lib user32.lib ;;
2564             -l*)                  echo ${flag#-l}.lib ;;
2565             *)                    echo $flag ;;
2566         esac
2567     done
2568 }
2569
2570 msvc_flags(){
2571     msvc_common_flags "$@"
2572     for flag; do
2573         case $flag in
2574             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2575                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2576                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2577                                        -wd4273 ;;
2578         esac
2579     done
2580 }
2581
2582 icl_flags(){
2583     msvc_common_flags "$@"
2584     for flag; do
2585         case $flag in
2586             # Despite what Intel's documentation says -Wall, which is supported
2587             # on Windows, does enable remarks so disable them here.
2588             -Wall)                echo $flag -Qdiag-disable:remark ;;
2589             -std=c99)             echo -Qstd=c99 ;;
2590         esac
2591     done
2592 }
2593
2594 pgi_flags(){
2595     for flag; do
2596         case $flag in
2597             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2598             -fomit-frame-pointer) echo -Mnoframe ;;
2599             -g)                   echo -gopt ;;
2600             *)                    echo $flag ;;
2601         esac
2602     done
2603 }
2604
2605 suncc_flags(){
2606     for flag; do
2607         case $flag in
2608             -march=*|-mcpu=*)
2609                 case "${flag#*=}" in
2610                     native)                   echo -xtarget=native       ;;
2611                     v9|niagara)               echo -xarch=sparc          ;;
2612                     ultrasparc)               echo -xarch=sparcvis       ;;
2613                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2614                     i586|pentium)             echo -xchip=pentium        ;;
2615                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2616                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2617                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2618                     pentium4*)          echo -xtarget=pentium4           ;;
2619                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2620                     *-sse3)             echo -xarch=sse3                 ;;
2621                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2622                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2623                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2624                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2625                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2626                     k8|opteron|athlon64|athlon-fx)
2627                                                echo -xarch=sse2a         ;;
2628                     athlon*)                   echo -xarch=pentium_proa  ;;
2629                 esac
2630                 ;;
2631             -std=c99)             echo -xc99              ;;
2632             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2633             -fPIC)                echo -KPIC -xcode=pic32 ;;
2634             -W*,*)                echo $flag              ;;
2635             -f*-*|-W*|-mimpure-text)                      ;;
2636             -shared)              echo -G                 ;;
2637             *)                    echo $flag              ;;
2638         esac
2639     done
2640 }
2641
2642 tms470_flags(){
2643     for flag; do
2644         case $flag in
2645             -march=*|-mcpu=*)
2646                 case "${flag#*=}" in
2647                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2648                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2649                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2650                     armv6*|arm11*)          echo -mv=6   ;;
2651                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2652                                             echo -mv=5e  ;;
2653                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2654                 esac
2655                 ;;
2656             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2657             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2658             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2659             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2660             -msoft-float)   echo --float_support=vfplib       ;;
2661             -O[0-3]|-mf=*)  echo $flag                        ;;
2662             -g)             echo -g -mn                       ;;
2663             -pds=*)         echo $flag                        ;;
2664             -D*|-I*)        echo $flag                        ;;
2665             --gcc|--abi=*)  echo $flag                        ;;
2666             -me)            echo $flag                        ;;
2667         esac
2668     done
2669 }
2670
2671 probe_cc(){
2672     pfx=$1
2673     _cc=$2
2674
2675     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2676     unset _ld_o _ldflags _ld_lib _ld_path
2677     unset _depflags _DEPCMD _DEPFLAGS
2678     _flags_filter=echo
2679
2680     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2681         _type=llvm_gcc
2682         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
2683         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
2684         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2685         _cflags_speed='-O3'
2686         _cflags_size='-Os'
2687     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2688         _type=gcc
2689         gcc_version=$($_cc --version | head -n1)
2690         gcc_basever=$($_cc -dumpversion)
2691         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2692         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2693         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2694         if ! $_cc -dumpversion | grep -q '^2\.'; then
2695             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2696         fi
2697         _cflags_speed='-O3'
2698         _cflags_size='-Os'
2699     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2700         _type=icc
2701         _ident=$($_cc --version | head -n1)
2702         _depflags='-MMD'
2703         _cflags_speed='-O3'
2704         _cflags_size='-Os'
2705         _cflags_noopt='-O1'
2706     elif $_cc -v 2>&1 | grep -q xlc; then
2707         _type=xlc
2708         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2709         _cflags_speed='-O5'
2710         _cflags_size='-O5 -qcompact'
2711     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2712         _type=ccc
2713         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2714         _DEPFLAGS='-M'
2715         _cflags_speed='-fast'
2716         _cflags_size='-O1'
2717         _flags_filter=ccc_flags
2718     elif $_cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
2719         test -d "$sysroot" || die "No valid sysroot specified."
2720         _type=armcc
2721         _ident=$($_cc --vsn | head -n1)
2722         armcc_conf="$PWD/armcc.conf"
2723         $_cc --arm_linux_configure                 \
2724              --arm_linux_config_file="$armcc_conf" \
2725              --configure_sysroot="$sysroot"        \
2726              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
2727              die "Error creating armcc configuration file."
2728         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
2729         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
2730         as_default="${cross_prefix}gcc"
2731         _depflags='-MMD'
2732         _cflags_speed='-O3'
2733         _cflags_size='-Os'
2734     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
2735         _type=tms470
2736         _ident=$($_cc -version | head -n1 | tr -s ' ')
2737         _flags='--gcc --abi=eabi -me'
2738         _cc_e='-ppl -fe=$@'
2739         _cc_o='-fe=$@'
2740         _depflags='-ppa -ppd=$(@:.o=.d)'
2741         _cflags_speed='-O3 -mf=5'
2742         _cflags_size='-O3 -mf=2'
2743         _flags_filter=tms470_flags
2744     elif $_cc -v 2>&1 | grep -q clang; then
2745         _type=clang
2746         _ident=$($_cc --version | head -n1)
2747         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2748         _cflags_speed='-O3'
2749         _cflags_size='-Os'
2750     elif $_cc -V 2>&1 | grep -q Sun; then
2751         _type=suncc
2752         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
2753         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
2754         _DEPFLAGS='-xM1 -xc99'
2755         _ldflags='-std=c99'
2756         _cflags_speed='-O5'
2757         _cflags_size='-O5 -xspace'
2758         _flags_filter=suncc_flags
2759     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
2760         _type=pathscale
2761         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2762         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2763         _cflags_speed='-O2'
2764         _cflags_size='-Os'
2765         _flags_filter='filter_out -Wdisabled-optimization'
2766     elif $_cc -v 2>&1 | grep -q Open64; then
2767         _type=open64
2768         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2769         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2770         _cflags_speed='-O2'
2771         _cflags_size='-Os'
2772         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
2773     elif $_cc -V 2>&1 | grep -q Portland; then
2774         _type=pgi
2775         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
2776         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
2777         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
2778         _cflags_size="-O2 -Munroll=c:1 $opt_common"
2779         _cflags_noopt="-O1"
2780         _flags_filter=pgi_flags
2781     elif $_cc 2>&1 | grep -q Microsoft; then
2782         _type=msvc
2783         _ident=$($cc 2>&1 | head -n1)
2784         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
2785         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
2786         _cflags_speed="-O2"
2787         _cflags_size="-O1"
2788         if $_cc 2>&1 | grep -q Linker; then
2789             _ld_o='-out:$@'
2790         else
2791             _ld_o='-Fe$@'
2792         fi
2793         _cc_o='-Fo$@'
2794         _cc_e='-P -Fi$@'
2795         _flags_filter=msvc_flags
2796         _ld_lib='lib%.a'
2797         _ld_path='-libpath:'
2798         _flags='-nologo'
2799         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
2800         if [ $pfx = hostcc ]; then
2801             append _cflags -Dsnprintf=_snprintf
2802         fi
2803     elif $_cc 2>&1 | grep -q Intel; then
2804         _type=icl
2805         _ident=$($cc 2>&1 | head -n1)
2806         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
2807         # Not only is O3 broken on 13.x+ but it is slower on all previous
2808         # versions (tested) as well.
2809         _cflags_speed="-O2"
2810         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
2811         if $_cc 2>&1 | grep -q Linker; then
2812             _ld_o='-out:$@'
2813         else
2814             _ld_o='-Fe$@'
2815         fi
2816         _cc_o='-Fo$@'
2817         _cc_e='-P'
2818         _flags_filter=icl_flags
2819         _ld_lib='lib%.a'
2820         _ld_path='-libpath:'
2821         # -Qdiag-error to make icl error when seeing certain unknown arguments
2822         _flags='-nologo -Qdiag-error:4044,10157'
2823         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
2824         # with MSVC which enables it by default.
2825         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
2826         if [ $pfx = hostcc ]; then
2827             append _cflags -Dsnprintf=_snprintf
2828         fi
2829     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
2830         _type=cparser
2831         _ident=$($_cc --version | head -n1)
2832         _depflags='-MMD'
2833         _cflags_speed='-O4'
2834         _cflags_size='-O2'
2835         _flags_filter=cparser_flags
2836     fi
2837
2838     eval ${pfx}_type=\$_type
2839     eval ${pfx}_ident=\$_ident
2840 }
2841
2842 set_ccvars(){
2843     eval ${1}_C=\${_cc_c-\${${1}_C}}
2844     eval ${1}_E=\${_cc_e-\${${1}_E}}
2845     eval ${1}_O=\${_cc_o-\${${1}_O}}
2846
2847     if [ -n "$_depflags" ]; then
2848         eval ${1}_DEPFLAGS=\$_depflags
2849     else
2850         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
2851         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
2852         eval DEP${1}FLAGS=\$_flags
2853     fi
2854 }
2855
2856 probe_cc cc "$cc"
2857 cflags_filter=$_flags_filter
2858 cflags_speed=$_cflags_speed
2859 cflags_size=$_cflags_size
2860 cflags_noopt=$_cflags_noopt
2861 add_cflags $_flags $_cflags
2862 cc_ldflags=$_ldflags
2863 set_ccvars CC
2864
2865 probe_cc hostcc "$host_cc"
2866 host_cflags_filter=$_flags_filter
2867 add_host_cflags  $_flags $_cflags
2868 set_ccvars HOSTCC
2869
2870 test -n "$cc_type" && enable $cc_type ||
2871     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
2872
2873 : ${as_default:=$cc}
2874 : ${dep_cc_default:=$cc}
2875 : ${ld_default:=$cc}
2876 : ${host_ld_default:=$host_cc}
2877 set_default ar as dep_cc ld host_ld
2878
2879 probe_cc as "$as"
2880 asflags_filter=$_flags_filter
2881 add_asflags $_flags $_cflags
2882 set_ccvars AS
2883
2884 probe_cc ld "$ld"
2885 ldflags_filter=$_flags_filter
2886 add_ldflags $_flags $_ldflags
2887 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
2888 LD_O=${_ld_o-$LD_O}
2889 LD_LIB=${_ld_lib-$LD_LIB}
2890 LD_PATH=${_ld_path-$LD_PATH}
2891
2892 probe_cc hostld "$host_ld"
2893 host_ldflags_filter=$_flags_filter
2894 add_host_ldflags $_flags $_ldflags
2895 HOSTLD_O=${_ld_o-$HOSTLD_O}
2896
2897 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
2898     probe_cc depcc "$dep_cc"
2899     CCDEP=${_DEPCMD:-$DEPCMD}
2900     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
2901     DEPCCFLAGS=$_flags
2902 fi
2903
2904 if $ar 2>&1 | grep -q Microsoft; then
2905     arflags="-nologo"
2906     ar_o='-out:$@'
2907 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
2908     arflags="rq"
2909     ar_o='$@'
2910 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
2911     arflags='-Xany -r -c'
2912     ar_o='$@'
2913 else
2914     arflags="rc"
2915     ar_o='$@'
2916 fi
2917
2918 add_cflags $extra_cflags
2919 add_asflags $extra_cflags
2920
2921 if test -n "$sysroot"; then
2922     case "$cc_type" in
2923         gcc|llvm_gcc|clang)
2924             add_cppflags --sysroot="$sysroot"
2925             add_ldflags --sysroot="$sysroot"
2926         ;;
2927         tms470)
2928             add_cppflags -I"$sysinclude"
2929             add_ldflags  --sysroot="$sysroot"
2930         ;;
2931     esac
2932 fi
2933
2934 if test "$cpu" = host; then
2935     enabled cross_compile &&
2936         die "--cpu=host makes no sense when cross-compiling."
2937
2938     case "$cc_type" in
2939         gcc|llvm_gcc)
2940             check_native(){
2941                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
2942                 sed -n "/cc1.*$1=/{
2943                             s/.*$1=\\([^ ]*\\).*/\\1/
2944                             p
2945                             q
2946                         }" $TMPE
2947             }
2948             cpu=$(check_native -march || check_native -mcpu)
2949         ;;
2950     esac
2951
2952     test "${cpu:-host}" = host &&
2953         die "--cpu=host not supported with compiler $cc"
2954 fi
2955
2956 # Deal with common $arch aliases
2957 case "$arch" in
2958     aarch64|arm64)
2959         arch="aarch64"
2960     ;;
2961     arm*)
2962         arch="arm"
2963     ;;
2964     mips*|IP*)
2965         arch="mips"
2966     ;;
2967     parisc*|hppa*)
2968         arch="parisc"
2969     ;;
2970     "Power Macintosh"|ppc*|powerpc*)
2971         arch="ppc"
2972     ;;
2973     s390|s390x)
2974         arch="s390"
2975     ;;
2976     sh4|sh)
2977         arch="sh4"
2978     ;;
2979     sun4u|sparc*)
2980         arch="sparc"
2981     ;;
2982     tilegx|tile-gx)
2983         arch="tilegx"
2984     ;;
2985     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
2986         arch="x86"
2987     ;;
2988 esac
2989
2990 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
2991 enable $arch
2992
2993 # Add processor-specific flags
2994 if enabled aarch64; then
2995
2996     case $cpu in
2997         armv*)
2998             cpuflags="-march=$cpu"
2999         ;;
3000         *)
3001             cpuflags="-mcpu=$cpu"
3002         ;;
3003     esac
3004
3005 elif enabled alpha; then
3006
3007     cpuflags="-mcpu=$cpu"
3008
3009 elif enabled arm; then
3010
3011     check_arm_arch() {
3012         check_cpp_condition stddef.h \
3013             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3014             $cpuflags
3015     }
3016
3017     probe_arm_arch() {
3018         if   check_arm_arch 4;        then echo armv4;
3019         elif check_arm_arch 4T;       then echo armv4t;
3020         elif check_arm_arch 5;        then echo armv5;
3021         elif check_arm_arch 5E;       then echo armv5e;
3022         elif check_arm_arch 5T;       then echo armv5t;
3023         elif check_arm_arch 5TE;      then echo armv5te;
3024         elif check_arm_arch 5TEJ;     then echo armv5te;
3025         elif check_arm_arch 6;        then echo armv6;
3026         elif check_arm_arch 6J;       then echo armv6j;
3027         elif check_arm_arch 6K;       then echo armv6k;
3028         elif check_arm_arch 6Z;       then echo armv6z;
3029         elif check_arm_arch 6ZK;      then echo armv6zk;
3030         elif check_arm_arch 6T2;      then echo armv6t2;
3031         elif check_arm_arch 7;        then echo armv7;
3032         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3033         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3034         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3035         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3036         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3037         fi
3038     }
3039
3040     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3041
3042     case $cpu in
3043         armv*)
3044             cpuflags="-march=$cpu"
3045             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3046         ;;
3047         *)
3048             cpuflags="-mcpu=$cpu"
3049             case $cpu in
3050                 cortex-a*)                               subarch=armv7a  ;;
3051                 cortex-r*)                               subarch=armv7r  ;;
3052                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3053                 arm11*)                                  subarch=armv6   ;;
3054                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3055                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3056                 *)                             subarch=$(probe_arm_arch) ;;
3057             esac
3058         ;;
3059     esac
3060
3061     case "$subarch" in
3062         armv5t*)    enable fast_clz                ;;
3063         armv[6-8]*) enable fast_clz fast_unaligned ;;
3064     esac
3065
3066 elif enabled avr32; then
3067
3068     case $cpu in
3069         ap7[02]0[0-2])
3070             subarch="avr32_ap"
3071             cpuflags="-mpart=$cpu"
3072         ;;
3073         ap)
3074             subarch="avr32_ap"
3075             cpuflags="-march=$cpu"
3076         ;;
3077         uc3[ab]*)
3078             subarch="avr32_uc"
3079             cpuflags="-mcpu=$cpu"
3080         ;;
3081         uc)
3082             subarch="avr32_uc"
3083             cpuflags="-march=$cpu"
3084         ;;
3085     esac
3086
3087 elif enabled bfin; then
3088
3089     cpuflags="-mcpu=$cpu"
3090
3091 elif enabled mips; then
3092
3093     cpuflags="-march=$cpu"
3094
3095 elif enabled ppc; then
3096
3097     case $(tolower $cpu) in
3098         601|ppc601|powerpc601)
3099             cpuflags="-mcpu=601"
3100             disable altivec
3101         ;;
3102         603*|ppc603*|powerpc603*)
3103             cpuflags="-mcpu=603"
3104             disable altivec
3105         ;;
3106         604*|ppc604*|powerpc604*)
3107             cpuflags="-mcpu=604"
3108             disable altivec
3109         ;;
3110         g3|75*|ppc75*|powerpc75*)
3111             cpuflags="-mcpu=750"
3112             disable altivec
3113         ;;
3114         g4|745*|ppc745*|powerpc745*)
3115             cpuflags="-mcpu=7450"
3116         ;;
3117         74*|ppc74*|powerpc74*)
3118             cpuflags="-mcpu=7400"
3119         ;;
3120         g5|970|ppc970|powerpc970)
3121             cpuflags="-mcpu=970"
3122         ;;
3123         power[3-7]*)
3124             cpuflags="-mcpu=$cpu"
3125         ;;
3126         cell)
3127             cpuflags="-mcpu=cell"
3128             enable ldbrx
3129         ;;
3130         e500mc)
3131             cpuflags="-mcpu=e500mc"
3132             disable altivec
3133         ;;
3134         e500v2)
3135             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3136             disable altivec
3137         ;;
3138         e500)
3139             cpuflags="-mcpu=8540 -mhard-float"
3140             disable altivec
3141         ;;
3142     esac
3143
3144 elif enabled sparc; then
3145
3146     case $cpu in
3147         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3148             cpuflags="-mcpu=$cpu"
3149             disable vis
3150         ;;
3151         ultrasparc*|niagara[234])
3152             cpuflags="-mcpu=$cpu"
3153         ;;
3154     esac
3155
3156 elif enabled x86; then
3157
3158     case $cpu in
3159         i[345]86|pentium)
3160             cpuflags="-march=$cpu"
3161             disable mmx
3162         ;;
3163         # targets that do NOT support nopl and conditional mov (cmov)
3164         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3165             cpuflags="-march=$cpu"
3166             disable i686
3167         ;;
3168         # targets that do support nopl and conditional mov (cmov)
3169         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3170             cpuflags="-march=$cpu"
3171             enable i686
3172             enable fast_cmov
3173         ;;
3174         # targets that do support conditional mov but on which it's slow
3175         pentium4|pentium4m|prescott|nocona)
3176             cpuflags="-march=$cpu"
3177             enable i686
3178             disable fast_cmov
3179         ;;
3180     esac
3181
3182 fi
3183
3184 if [ "$cpu" != generic ]; then
3185     add_cflags  $cpuflags
3186     add_asflags $cpuflags
3187 fi
3188
3189 # compiler sanity check
3190 check_exec <<EOF
3191 int main(void){ return 0; }
3192 EOF
3193 if test "$?" != 0; then
3194     echo "$cc is unable to create an executable file."
3195     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3196         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3197         echo "Only do this if you know what cross compiling means."
3198     fi
3199     die "C compiler test failed."
3200 fi
3201
3202 add_cppflags -D_ISOC99_SOURCE
3203 check_cflags -std=c99
3204 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3205 #include <stdlib.h>
3206 EOF
3207 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3208 #include <stdlib.h>
3209 EOF
3210
3211 add_host_cppflags -D_ISOC99_SOURCE
3212 check_host_cflags -std=c99
3213 check_host_cflags -Wall
3214 check_host_cflags -O3
3215
3216 check_64bit(){
3217     arch32=$1
3218     arch64=$2
3219     expr=$3
3220     check_code cc "" "int test[2*($expr) - 1]" &&
3221         subarch=$arch64 || subarch=$arch32
3222 }
3223
3224 case "$arch" in
3225     aarch64|alpha|ia64)
3226         spic=$shared
3227     ;;
3228     mips)
3229         check_64bit mips mips64 '_MIPS_SIM > 1'
3230         spic=$shared
3231     ;;
3232     parisc)
3233         check_64bit parisc parisc64 'sizeof(void *) > 4'
3234         spic=$shared
3235     ;;
3236     ppc)
3237         check_64bit ppc ppc64 'sizeof(void *) > 4'
3238         spic=$shared
3239     ;;
3240     s390)
3241         check_64bit s390 s390x 'sizeof(void *) > 4'
3242         spic=$shared
3243     ;;
3244     sparc)
3245         check_64bit sparc sparc64 'sizeof(void *) > 4'
3246         spic=$shared
3247     ;;
3248     x86)
3249         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3250         if test "$subarch" = "x86_64"; then
3251             spic=$shared
3252         fi
3253     ;;
3254 esac
3255
3256 enable $subarch
3257 enabled spic && enable_weak pic
3258
3259 # OS specific
3260 case $target_os in
3261     aix)
3262         SHFLAGS=-shared
3263         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3264         enabled shared && add_ldflags -Wl,-brtl
3265         ;;
3266     haiku)
3267         prefix_default="/boot/common"
3268         network_extralibs="-lnetwork"
3269         host_libs=
3270         ;;
3271     sunos)
3272         SHFLAGS='-shared -Wl,-h,$$(@F)'
3273         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3274         network_extralibs="-lsocket -lnsl"
3275         # When using suncc to build, the Solaris linker will mark
3276         # an executable with each instruction set encountered by
3277         # the Solaris assembler.  As our libraries contain their own
3278         # guards for processor-specific code, instead suppress
3279         # generation of the HWCAPS ELF section on Solaris x86 only.
3280         enabled_all suncc x86 &&
3281             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3282             add_ldflags -Wl,-M,mapfile
3283         nm_default='nm -P -g'
3284         ;;
3285     netbsd)
3286         disable symver
3287         oss_indev_extralibs="-lossaudio"
3288         oss_outdev_extralibs="-lossaudio"
3289         ;;
3290     openbsd|bitrig)
3291         disable symver
3292         SHFLAGS='-shared'
3293         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3294         SLIB_INSTALL_LINKS=
3295         oss_indev_extralibs="-lossaudio"
3296         oss_outdev_extralibs="-lossaudio"
3297         ;;
3298     dragonfly)
3299         disable symver
3300         ;;
3301     freebsd)
3302         ;;
3303     bsd/os)
3304         add_extralibs -lpoll -lgnugetopt
3305         ;;
3306     darwin)
3307         gas="gas-preprocessor.pl $cc"
3308         enabled ppc && add_asflags -force_cpusubtype_ALL
3309         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3310         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3311         add_ldflags -Wl,-dynamic,-search_paths_first
3312         SLIBSUF=".dylib"
3313         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3314         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3315         objformat="macho"
3316         enabled x86_64 && objformat="macho64"
3317         enabled_any pic shared ||
3318             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3319         ;;
3320     mingw32*)
3321         if test $target_os = "mingw32ce"; then
3322             disable network
3323         else
3324             target_os=mingw32
3325         fi
3326         LIBTARGET=i386
3327         if enabled x86_64; then
3328             LIBTARGET="i386:x86-64"
3329         elif enabled arm; then
3330             LIBTARGET=arm-wince
3331         fi
3332         check_ldflags -Wl,--nxcompat
3333         check_ldflags -Wl,--dynamicbase
3334         shlibdir_default="$bindir_default"
3335         SLIBPREF=""
3336         SLIBSUF=".dll"
3337         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3338         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3339         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3340         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3341         SLIB_INSTALL_LINKS=
3342         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3343         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3344         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3345         objformat="win32"
3346         dlltool="${cross_prefix}dlltool"
3347         ranlib=:
3348         enable dos_paths
3349         ;;
3350     win32|win64)
3351         disable symver
3352         if enabled shared; then
3353             # Link to the import library instead of the normal static library
3354             # for shared libs.
3355             LD_LIB='%.lib'
3356             # Cannot build both shared and static libs with MSVC or icl.
3357             disable static
3358         fi
3359         shlibdir_default="$bindir_default"
3360         SLIBPREF=""
3361         SLIBSUF=".dll"
3362         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3363         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3364         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3365         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3366         SLIB_INSTALL_LINKS=
3367         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3368         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3369         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3370         objformat="win32"
3371         ranlib=:
3372         enable dos_paths
3373         ;;
3374     cygwin*)
3375         target_os=cygwin
3376         shlibdir_default="$bindir_default"
3377         SLIBPREF="cyg"
3378         SLIBSUF=".dll"
3379         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3380         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3381         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3382         SLIB_INSTALL_LINKS=
3383         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3384         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3385         objformat="win32"
3386         enable dos_paths
3387         ;;
3388     *-dos|freedos|opendos)
3389         network_extralibs="-lsocket"
3390         objformat="coff"
3391         enable dos_paths
3392         add_cppflags -U__STRICT_ANSI__
3393         ;;
3394     linux)
3395         enable dv1394
3396         ;;
3397     irix*)
3398         target_os=irix
3399         ranlib="echo ignoring ranlib"
3400         ;;
3401     os/2*)
3402         ln_s="cp -f"
3403         objformat="aout"
3404         add_cppflags -D_GNU_SOURCE
3405         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3406         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3407         LIBSUF="_s.a"
3408         SLIBPREF=""
3409         SLIBSUF=".dll"
3410         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3411         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3412         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3413             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3414             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3415             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3416             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3417             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3418         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3419             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3420         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3421         enable dos_paths
3422         ;;
3423     gnu/kfreebsd)
3424         add_cppflags -D_BSD_SOURCE
3425         ;;
3426     gnu)
3427         ;;
3428     qnx)
3429         add_cppflags -D_QNX_SOURCE
3430         network_extralibs="-lsocket"
3431         ;;
3432     symbian)
3433         SLIBSUF=".dll"
3434         enable dos_paths
3435         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3436         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3437         add_ldflags -Wl,--target1-abs,--no-undefined \
3438                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3439                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3440         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3441                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3442                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3443         ;;
3444     osf1)
3445         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3446         ;;
3447     minix)
3448         ;;
3449     plan9)
3450         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3451                      -D_REENTRANT_SOURCE        \
3452                      -D_RESEARCH_SOURCE         \
3453                      -DFD_SETSIZE=96            \
3454                      -DHAVE_SOCK_OPTS
3455         add_compat strtod.o strtod=avpriv_strtod
3456         network_extralibs='-lbsd'
3457         exeobjs=compat/plan9/main.o
3458         disable avserver
3459         cp_f='cp'
3460         ;;
3461     none)
3462         ;;
3463     *)
3464         die "Unknown OS '$target_os'."
3465         ;;
3466 esac
3467
3468 # determine libc flavour
3469
3470 probe_libc(){
3471     pfx=$1
3472     pfx_no_=${pfx%_}
3473     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3474     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3475         eval ${pfx}libc_type=uclibc
3476         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3477     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3478         eval ${pfx}libc_type=glibc
3479         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3480     # MinGW headers can be installed on Cygwin, so check for newlib first.
3481     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3482         eval ${pfx}libc_type=newlib
3483         add_${pfx}cppflags -U__STRICT_ANSI__
3484     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3485     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3486         eval ${pfx}libc_type=mingw64
3487         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3488         eval test \$${pfx_no_}cc_type = "gcc" &&
3489             add_${pfx}cppflags -D__printf__=__gnu_printf__
3490     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3491          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3492         eval ${pfx}libc_type=mingw32
3493         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3494             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3495             die "ERROR: MinGW32 runtime version must be >= 3.15."
3496         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3497         eval test \$${pfx_no_}cc_type = "gcc" &&
3498             add_${pfx}cppflags -D__printf__=__gnu_printf__
3499     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3500         eval ${pfx}libc_type=msvcrt
3501         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3502         # 0x601 by default unless something else is set by the user.
3503         # This can easily lead to us detecting functions only present
3504         # in such new versions and producing binaries requiring windows 7.0.
3505         # Therefore explicitly set the default to XP unless the user has
3506         # set something else on the command line.
3507         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3508             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
3509     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3510         eval ${pfx}libc_type=klibc
3511     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3512         eval ${pfx}libc_type=bionic
3513     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3514         eval ${pfx}libc_type=solaris
3515         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3516     fi
3517 }
3518
3519 probe_libc
3520 test -n "$libc_type" && enable libc_$libc_type
3521 probe_libc host_
3522 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3523
3524 case $libc_type in
3525     bionic)
3526         add_compat strtod.o strtod=avpriv_strtod
3527         ;;
3528     msvcrt)
3529         add_compat strtod.o strtod=avpriv_strtod
3530         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3531                                      _snprintf=avpriv_snprintf  \
3532                                      vsnprintf=avpriv_vsnprintf
3533         ;;
3534 esac
3535
3536 # hacks for compiler/libc/os combinations
3537
3538 if enabled_all tms470 libc_glibc; then
3539     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3540     add_cppflags -D__USER_LABEL_PREFIX__=
3541     add_cppflags -D__builtin_memset=memset
3542     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3543     add_cflags   -pds=48    # incompatible redefinition of macro
3544 fi
3545
3546 if enabled_all ccc libc_glibc; then
3547     add_ldflags -Wl,-z,now  # calls to libots crash without this
3548 fi
3549
3550 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3551     add_cppflags '-I\$(SRC_PATH)/compat/float'
3552
3553 esc(){
3554     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3555 }
3556
3557 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3558
3559 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3560
3561 set_default $PATHS_LIST
3562 set_default nm
3563
3564 # we need to build at least one lib type
3565 if ! enabled_any static shared; then
3566     cat <<EOF
3567 At least one library type must be built.
3568 Specify --enable-static to build the static libraries or --enable-shared to
3569 build the shared libraries as well. To only build the shared libraries specify
3570 --disable-static in addition to --enable-shared.
3571 EOF
3572     exit 1;
3573 fi
3574
3575 die_license_disabled() {
3576     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3577 }
3578
3579 die_license_disabled gpl libcdio
3580 die_license_disabled gpl libx264
3581 die_license_disabled gpl libx265
3582 die_license_disabled gpl libxavs
3583 die_license_disabled gpl libxvid
3584 die_license_disabled gpl x11grab
3585
3586 die_license_disabled nonfree libfaac
3587 die_license_disabled nonfree libfdk_aac
3588 die_license_disabled nonfree openssl
3589
3590 die_license_disabled version3 libopencore_amrnb
3591 die_license_disabled version3 libopencore_amrwb
3592 die_license_disabled version3 libvo_aacenc
3593 die_license_disabled version3 libvo_amrwbenc
3594
3595 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3596
3597 disabled optimizations || check_cflags -fomit-frame-pointer
3598
3599 enable_weak_pic() {
3600     disabled pic && return
3601     enable pic
3602     add_cppflags -DPIC
3603     case "$target_os" in
3604     mingw*|cygwin*)
3605         ;;
3606     *)
3607         add_cflags -fPIC
3608         ;;
3609     esac
3610     add_asflags  -fPIC
3611 }
3612
3613 enabled pic && enable_weak_pic
3614
3615 check_cc <<EOF || die "Symbol mangling check failed."
3616 int ff_extern;
3617 EOF
3618 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3619 extern_prefix=${sym%%ff_extern*}
3620
3621 check_cc <<EOF && enable_weak inline_asm
3622 void foo(void) { __asm__ volatile ("" ::); }
3623 EOF
3624
3625 _restrict=
3626 for restrict_keyword in restrict __restrict__ __restrict; do
3627     check_cc <<EOF && _restrict=$restrict_keyword && break
3628 void foo(char * $restrict_keyword p);
3629 EOF
3630 done
3631
3632 check_cc <<EOF && enable pragma_deprecated
3633 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3634 EOF
3635
3636 check_cc <<EOF && enable attribute_packed
3637 struct { int x; } __attribute__((packed)) x;
3638 EOF
3639
3640 check_cc <<EOF && enable attribute_may_alias
3641 union { int x; } __attribute__((may_alias)) x;
3642 EOF
3643
3644 check_cc <<EOF || die "endian test failed"
3645 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3646 EOF
3647 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3648
3649 check_inline_asm inline_asm_labels '"1:\n"'
3650
3651 if enabled aarch64; then
3652     # internal assembler in clang 3.3 does not support this instruction
3653     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
3654     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
3655
3656     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
3657
3658 elif enabled alpha; then
3659
3660     check_cflags -mieee
3661
3662 elif enabled arm; then
3663
3664     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
3665     enabled thumb && check_cflags -mthumb || check_cflags -marm
3666     nogas=die
3667
3668     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
3669         enable vfp_args
3670     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
3671         case "${cross_prefix:-$cc}" in
3672             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
3673             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
3674 __asm__ (".eabi_attribute 28, 1");
3675 int main(void) { return 0; }
3676 EOF
3677         esac
3678         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
3679     fi
3680
3681     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
3682     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
3683     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
3684     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
3685     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
3686     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
3687
3688     [ $target_os = linux ] ||
3689         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
3690             $ARCH_EXT_LIST_ARM
3691
3692     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
3693
3694     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
3695
3696 elif enabled mips; then
3697
3698     check_inline_asm loongson '"dmult.g $1, $2, $3"'
3699
3700 elif enabled parisc; then
3701
3702     if enabled gcc; then
3703         case $($cc -dumpversion) in
3704             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
3705         esac
3706     fi
3707
3708 elif enabled ppc; then
3709
3710     enable local_aligned_8 local_aligned_16
3711
3712     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
3713     check_inline_asm ibm_asm   '"add 0, 0, 0"'
3714     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
3715     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
3716
3717     # AltiVec flags: The FSF version of GCC differs from the Apple version
3718     if enabled altivec; then
3719         nogas=warn
3720         check_cflags -maltivec -mabi=altivec &&
3721         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
3722         check_cflags -faltivec
3723
3724         # check if our compiler supports Motorola AltiVec C API
3725         check_cc <<EOF || disable altivec
3726 $inc_altivec_h
3727 int main(void) {
3728     vector signed int v1 = (vector signed int) { 0 };
3729     vector signed int v2 = (vector signed int) { 1 };
3730     v1 = vec_add(v1, v2);
3731     return 0;
3732 }
3733 EOF
3734
3735         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
3736     fi
3737
3738 elif enabled sparc; then
3739
3740     enabled vis && check_inline_asm vis '"pdist %f0, %f0, %f0"'
3741
3742 elif enabled x86; then
3743
3744     check_builtin rdtsc    intrin.h   "__rdtsc()"
3745     check_builtin mm_empty mmintrin.h "_mm_empty()"
3746
3747     enable local_aligned_8 local_aligned_16
3748
3749     # check whether EBP is available on x86
3750     # As 'i' is stored on the stack, this program will crash
3751     # if the base pointer is used to access it because the
3752     # base pointer is cleared in the inline assembly code.
3753     check_exec_crash <<EOF && enable ebp_available
3754 volatile int i=0;
3755 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
3756 return i;
3757 EOF
3758
3759     # check whether EBX is available on x86
3760     check_inline_asm ebx_available '""::"b"(0)' &&
3761         check_inline_asm ebx_available '"":::"%ebx"'
3762
3763     # check whether xmm clobbers are supported
3764     check_inline_asm xmm_clobbers '"":::"%xmm0"'
3765
3766     # check whether binutils is new enough to compile SSSE3/MMXEXT
3767     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
3768     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
3769
3770     if ! disabled_any asm mmx yasm; then
3771         if check_cmd $yasmexe --version; then
3772             enabled x86_64 && yasm_extra="-m amd64"
3773             yasm_debug="-g dwarf2"
3774         elif check_cmd nasm -v; then
3775             yasmexe=nasm
3776             yasm_debug="-g -F dwarf"
3777             enabled x86_64 && test "$objformat" = elf && objformat=elf64
3778         fi
3779
3780         YASMFLAGS="-f $objformat $yasm_extra"
3781         enabled pic               && append YASMFLAGS "-DPIC"
3782         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
3783         case "$objformat" in
3784             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
3785         esac
3786
3787         check_yasm "movbe ecx, [5]" && enable yasm ||
3788             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
3789         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
3790         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
3791         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
3792         check_yasm "CPU amdnop" || disable cpunop
3793     fi
3794
3795     case "$cpu" in
3796         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
3797             disable fast_clz
3798         ;;
3799     esac
3800
3801 fi
3802
3803 if enabled asm; then
3804     as=${gas:=$as}
3805     check_as <<EOF && enable gnu_as || \
3806         $nogas "GNU assembler not found, install gas-preprocessor"
3807 .macro m n
3808 \n: .int 0
3809 .endm
3810 m x
3811 EOF
3812 fi
3813
3814 check_ldflags -Wl,--as-needed
3815
3816 if check_func dlopen; then
3817     ldl=
3818 elif check_func dlopen -ldl; then
3819     ldl=-ldl
3820 fi
3821
3822 if ! disabled network; then
3823     check_type "sys/types.h sys/socket.h" socklen_t
3824     check_type netdb.h "struct addrinfo"
3825     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
3826     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
3827     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
3828     check_type netinet/in.h "struct sockaddr_in6"
3829     check_type poll.h "struct pollfd"
3830     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
3831     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
3832     check_type netinet/sctp.h "struct sctp_event_subscribe"
3833     check_func getaddrinfo $network_extralibs
3834     check_func getservbyport $network_extralibs
3835     check_func inet_aton $network_extralibs
3836     # Prefer arpa/inet.h over winsock2
3837     if check_header arpa/inet.h ; then
3838         check_func closesocket
3839     elif check_header winsock2.h ; then
3840         check_func_headers winsock2.h closesocket -lws2 &&
3841             network_extralibs="-lws2" ||
3842         { check_func_headers winsock2.h closesocket -lws2_32 &&
3843             network_extralibs="-lws2_32"; } || disable winsock2_h network
3844         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
3845         check_type ws2tcpip.h socklen_t
3846         check_type ws2tcpip.h "struct addrinfo"
3847         check_type ws2tcpip.h "struct group_source_req"
3848         check_type ws2tcpip.h "struct ip_mreq_source"
3849         check_type ws2tcpip.h "struct ipv6_mreq"
3850         check_type winsock2.h "struct pollfd"
3851         check_type ws2tcpip.h "struct sockaddr_in6"
3852         check_type ws2tcpip.h "struct sockaddr_storage"
3853         check_struct winsock2.h "struct sockaddr" sa_len
3854     else
3855         disable network
3856     fi
3857 fi
3858
3859 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
3860 check_func nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
3861
3862 check_func  fcntl
3863 check_func  fork
3864 check_func_headers stdlib.h getenv
3865 check_func  gethrtime
3866 check_func  getopt
3867 check_func  getrusage
3868 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
3869 check_func  gettimeofday
3870 check_func  isatty
3871 check_func  localtime_r
3872 check_func  mach_absolute_time
3873 check_func  ${malloc_prefix}memalign            && enable memalign
3874 check_func  mkstemp
3875 check_func  mmap
3876 check_func  mprotect
3877 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
3878 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
3879 check_func  setrlimit
3880 check_func  strerror_r
3881 check_func  strptime
3882 check_func  sched_getaffinity
3883 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
3884 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
3885 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
3886 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
3887 check_func  sysconf
3888 check_func  sysctl
3889 check_func  usleep
3890 check_func_headers io.h setmode
3891 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
3892 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
3893 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
3894 check_func_headers windows.h GetProcessAffinityMask
3895 check_func_headers windows.h GetProcessTimes
3896 check_func_headers windows.h GetSystemTimeAsFileTime
3897 check_func_headers windows.h MapViewOfFile
3898 check_func_headers windows.h SetConsoleTextAttribute
3899 check_func_headers windows.h Sleep
3900 check_func_headers windows.h VirtualAlloc
3901
3902 check_header direct.h
3903 check_header dlfcn.h
3904 check_header dxva.h
3905 check_header dxva2api.h
3906 check_header io.h
3907 check_header mach/mach_time.h
3908 check_header malloc.h
3909 check_header poll.h
3910 check_header sys/mman.h
3911 check_header sys/param.h
3912 check_header sys/resource.h
3913 check_header sys/select.h
3914 check_header sys/time.h
3915 check_header sys/un.h
3916 check_header unistd.h
3917 check_header vdpau/vdpau.h
3918 check_header vdpau/vdpau_x11.h
3919 check_header VideoDecodeAcceleration/VDADecoder.h
3920 check_header windows.h
3921 check_header X11/extensions/XvMClib.h
3922
3923 if ! disabled w32threads && ! enabled pthreads; then
3924     check_func_headers "windows.h process.h" _beginthreadex &&
3925         enable w32threads || disable w32threads
3926 fi
3927
3928 # check for some common methods of building with pthread support
3929 # do this before the optional library checks as some of them require pthreads
3930 if ! disabled pthreads && ! enabled w32threads; then
3931     enable pthreads
3932     if check_func pthread_join -pthread; then
3933         add_cflags -pthread
3934         add_extralibs -pthread
3935     elif check_func pthread_join -pthreads; then
3936         add_cflags -pthreads
3937         add_extralibs -pthreads
3938     elif check_func pthread_join -lpthreadGC2; then
3939         add_extralibs -lpthreadGC2
3940     elif check_lib pthread.h pthread_join -lpthread; then
3941         :
3942     elif ! check_func pthread_join; then
3943         disable pthreads
3944     fi
3945 fi
3946
3947 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
3948 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
3949
3950 check_lib math.h sin -lm && LIBM="-lm"
3951 enabled vaapi && require vaapi va/va.h vaInitialize -lva
3952
3953 atan2f_args=2
3954 ldexpf_args=2
3955 powf_args=2
3956
3957 for func in $MATH_FUNCS; do
3958     eval check_mathfunc $func \${${func}_args:-1}
3959 done
3960
3961 # these are off by default, so fail if requested and not available
3962 enabled avisynth          && { { check_header "avisynth/avisynth_c.h" && check_lib2 "windows.h" LoadLibrary; } ||
3963                                { check_header "avxsynth/avxsynth_c.h" && check_lib2 "dlfcn.h" dlopen -ldl; } ||
3964                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
3965 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
3966 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
3967 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
3968 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
3969 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
3970 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
3971                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
3972                                done || die "ERROR: libgsm not found"; }
3973 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
3974 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
3975 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
3976 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
3977 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
3978 enabled libopenjpeg       && require_pkg_config libopenjpeg openjpeg.h opj_version
3979 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
3980 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
3981 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
3982 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
3983 enabled libspeex          && require libspeex speex/speex.h speex_decoder_init -lspeex
3984 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
3985 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
3986 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
3987 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
3988 enabled libvpx            && {
3989     enabled libvpx_vp8_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
3990                                     die "ERROR: libvpx decoder version must be >=0.9.1"; }
3991     enabled libvpx_vp8_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_enc_init_ver VPX_CQ" -lvpx ||
3992                                     die "ERROR: libvpx encoder version must be >=0.9.6"; }
3993     enabled libvpx_vp9_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx" -lvpx || disable libvpx_vp9_decoder; }
3994     enabled libvpx_vp9_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_vp9_cx" -lvpx || disable libvpx_vp9_encoder; } }
3995 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
3996 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
3997 enabled libx264           && require libx264 x264.h x264_encoder_encode -lx264 &&
3998                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
3999                                die "ERROR: libx264 version must be >= 0.118."; }
4000 enabled libx265           && require_pkg_config x265 x265.h x265_encoder_encode &&
4001                              { check_cpp_condition x265.h "X265_BUILD >= 9" ||
4002                                die "ERROR: libx265 version must be >= 9."; }
4003 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4004 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4005 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4006                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4007                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4008                                die "ERROR: openssl not found"; }
4009
4010 if enabled gnutls; then
4011     { check_lib nettle/bignum.h nettle_mpz_get_str_256 -lnettle -lhogweed -lgmp && enable nettle; } ||
4012     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4013 fi
4014
4015 # libdc1394 check
4016 if enabled libdc1394; then
4017     { check_lib dc1394/dc1394.h dc1394_new -ldc1394 -lraw1394 &&
4018         enable libdc1394_2; } ||
4019     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4020         enable libdc1394_1; } ||