build: Drop stray MLP decoder dependency on dsputil
[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 Toolchain options:
216   --arch=ARCH              select architecture [$arch]
217   --cpu=CPU                select the minimum required CPU (affects
218                            instruction selection, may crash on older CPUs)
219   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
220   --enable-cross-compile   assume a cross-compiler is used
221   --sysroot=PATH           root of cross-build tree
222   --sysinclude=PATH        location of cross-build system headers
223   --target-os=OS           compiler targets OS [$target_os]
224   --target-exec=CMD        command to run executables on target
225   --target-path=DIR        path to view of build directory on target
226   --target-samples=DIR     path to samples directory on target
227   --toolchain=NAME         set tool defaults according to NAME
228   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
229   --nm=NM                  use nm tool
230   --ar=AR                  use archive tool AR [$ar_default]
231   --as=AS                  use assembler AS [$as_default]
232   --cc=CC                  use C compiler CC [$cc_default]
233   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
234   --ld=LD                  use linker LD
235   --pkg-config=PKGCONF     use pkg-config PKGCONF [$pkg_config_default]
236   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
237   --host-cc=HOSTCC         use host C compiler HOSTCC
238   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
239   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
240   --host-ld=HOSTLD         use host linker HOSTLD
241   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
242   --host-libs=HLIBS        use libs HLIBS when linking for host
243   --host-os=OS             compiler host OS [$target_os]
244   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
245   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
246   --extra-libs=ELIBS       add ELIBS [$ELIBS]
247   --extra-version=STRING   version string suffix []
248   --optflags=OPTFLAGS      override optimization-related compiler flags
249   --build-suffix=SUFFIX    library name suffix []
250   --enable-pic             build position-independent code
251   --enable-thumb           compile for Thumb instruction set
252   --enable-lto             use link-time optimization
253
254 Advanced options (experts only):
255   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
256   --disable-symver         disable symbol versioning
257   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
258   --disable-safe-bitstream-reader
259                            disable buffer boundary checking in bitreaders
260                            (faster, but may crash)
261   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
262   --enable-sram            allow use of on-chip SRAM
263
264 Optimization options (experts only):
265   --disable-asm            disable all assembler optimizations
266   --disable-altivec        disable AltiVec optimizations
267   --disable-amd3dnow       disable 3DNow! optimizations
268   --disable-amd3dnowext    disable 3DNow! extended optimizations
269   --disable-mmx            disable MMX optimizations
270   --disable-mmxext         disable MMXEXT optimizations
271   --disable-sse            disable SSE optimizations
272   --disable-sse2           disable SSE2 optimizations
273   --disable-sse3           disable SSE3 optimizations
274   --disable-ssse3          disable SSSE3 optimizations
275   --disable-sse4           disable SSE4 optimizations
276   --disable-sse42          disable SSE4.2 optimizations
277   --disable-avx            disable AVX optimizations
278   --disable-xop            disable XOP optimizations
279   --disable-fma3           disable FMA3 optimizations
280   --disable-fma4           disable FMA4 optimizations
281   --disable-avx2           disable AVX2 optimizations
282   --disable-armv5te        disable armv5te optimizations
283   --disable-armv6          disable armv6 optimizations
284   --disable-armv6t2        disable armv6t2 optimizations
285   --disable-vfp            disable VFP optimizations
286   --disable-neon           disable NEON optimizations
287   --disable-vis            disable VIS optimizations
288   --disable-inline-asm     disable use of inline assembler
289   --disable-yasm           disable use of yasm assembler
290
291 Developer options (useful when working on Libav itself):
292   --disable-debug          disable debugging symbols
293   --enable-debug=LEVEL     set the debug level [$debuglevel]
294   --disable-optimizations  disable compiler optimizations
295   --enable-extra-warnings  enable more compiler warnings
296   --samples=PATH           location of test samples for FATE, if not set use
297                            \$LIBAV_SAMPLES at make invocation time.
298   --enable-neon-clobber-test check NEON registers for clobbering (should be
299                            used only for debugging purposes)
300   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
301                            should be used only for debugging purposes)
302   --enable-random          randomly enable/disable components
303   --disable-random
304   --enable-random=LIST     randomly enable/disable specific components or
305   --disable-random=LIST    component groups. LIST is a comma-separated list
306                            of NAME[:PROB] entries where NAME is a component
307                            (group) and PROB the probability associated with
308                            NAME (default 0.5).
309   --random-seed=VALUE      seed value for --enable/disable-random
310
311 NOTE: Object files are built at the place where configure is launched.
312 EOF
313   exit 0
314 }
315
316 quotes='""'
317
318 log(){
319     echo "$@" >> $logfile
320 }
321
322 log_file(){
323     log BEGIN $1
324     pr -n -t $1 >> $logfile
325     log END $1
326 }
327
328 echolog(){
329     log "$@"
330     echo "$@"
331 }
332
333 warn(){
334     log "WARNING: $*"
335     WARNINGS="${WARNINGS}WARNING: $*\n"
336 }
337
338 die(){
339     echolog "$@"
340     cat <<EOF
341
342 If you think configure made a mistake, make sure you are using the latest
343 version from Git.  If the latest version fails, report the problem to the
344 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
345 EOF
346     if disabled logging; then
347         cat <<EOF
348 Rerun configure with logging enabled (do not use --disable-logging), and
349 include the log this produces with your report.
350 EOF
351     else
352         cat <<EOF
353 Include the log file "$logfile" produced by configure as this will help
354 solving the problem.
355 EOF
356     fi
357     exit 1
358 }
359
360 # Avoid locale weirdness, besides we really just want to translate ASCII.
361 toupper(){
362     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
363 }
364
365 tolower(){
366     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
367 }
368
369 c_escape(){
370     echo "$*" | sed 's/["\\]/\\\0/g'
371 }
372
373 sh_quote(){
374     v=$(echo "$1" | sed "s/'/'\\\\''/g")
375     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
376     echo "$v"
377 }
378
379 cleanws(){
380     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
381 }
382
383 filter(){
384     pat=$1
385     shift
386     for v; do
387         eval "case $v in $pat) echo $v ;; esac"
388     done
389 }
390
391 filter_out(){
392     pat=$1
393     shift
394     for v; do
395         eval "case $v in $pat) ;; *) echo $v ;; esac"
396     done
397 }
398
399 map(){
400     m=$1
401     shift
402     for v; do eval $m; done
403 }
404
405 add_suffix(){
406     suffix=$1
407     shift
408     for v; do echo ${v}${suffix}; done
409 }
410
411 set_all(){
412     value=$1
413     shift
414     for var in $*; do
415         eval $var=$value
416     done
417 }
418
419 set_weak(){
420     value=$1
421     shift
422     for var; do
423         eval : \${$var:=$value}
424     done
425 }
426
427 sanitize_var_name(){
428     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
429 }
430
431 set_safe(){
432     var=$1
433     shift
434     eval $(sanitize_var_name "$var")='$*'
435 }
436
437 get_safe(){
438     eval echo \$$(sanitize_var_name "$1")
439 }
440
441 pushvar(){
442     for pvar in $*; do
443         eval level=\${${pvar}_level:=0}
444         eval ${pvar}_${level}="\$$pvar"
445         eval ${pvar}_level=$(($level+1))
446     done
447 }
448
449 popvar(){
450     for pvar in $*; do
451         eval level=\${${pvar}_level:-0}
452         test $level = 0 && continue
453         eval level=$(($level-1))
454         eval $pvar="\${${pvar}_${level}}"
455         eval ${pvar}_level=$level
456         eval unset ${pvar}_${level}
457     done
458 }
459
460 enable(){
461     set_all yes $*
462 }
463
464 disable(){
465     set_all no $*
466 }
467
468 enable_weak(){
469     set_weak yes $*
470 }
471
472 disable_weak(){
473     set_weak no $*
474 }
475
476 enable_safe(){
477     for var; do
478         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
479     done
480 }
481
482 disable_safe(){
483     for var; do
484         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
485     done
486 }
487
488 do_enable_deep(){
489     for var; do
490         enabled $var && continue
491         eval sel="\$${var}_select"
492         eval sgs="\$${var}_suggest"
493         pushvar var sgs
494         enable_deep $sel
495         popvar sgs
496         enable_deep_weak $sgs
497         popvar var
498     done
499 }
500
501 enable_deep(){
502     do_enable_deep $*
503     enable $*
504 }
505
506 enable_deep_weak(){
507     for var; do
508         disabled $var && continue
509         pushvar var
510         do_enable_deep $var
511         popvar var
512         enable_weak $var
513     done
514 }
515
516 enabled(){
517     test "${1#!}" = "$1" && op== || op=!=
518     eval test "x\$${1#!}" $op "xyes"
519 }
520
521 disabled(){
522     test "${1#!}" = "$1" && op== || op=!=
523     eval test "x\$${1#!}" $op "xno"
524 }
525
526 enabled_all(){
527     for opt; do
528         enabled $opt || return 1
529     done
530 }
531
532 disabled_all(){
533     for opt; do
534         disabled $opt || return 1
535     done
536 }
537
538 enabled_any(){
539     for opt; do
540         enabled $opt && return 0
541     done
542 }
543
544 disabled_any(){
545     for opt; do
546         disabled $opt && return 0
547     done
548     return 1
549 }
550
551 set_default(){
552     for opt; do
553         eval : \${$opt:=\$${opt}_default}
554     done
555 }
556
557 is_in(){
558     value=$1
559     shift
560     for var in $*; do
561         [ $var = $value ] && return 0
562     done
563     return 1
564 }
565
566 do_check_deps(){
567     for cfg; do
568         cfg="${cfg#!}"
569         enabled ${cfg}_checking && die "Circular dependency for $cfg."
570         disabled ${cfg}_checking && continue
571         enable ${cfg}_checking
572         append allopts $cfg
573
574         eval dep_all="\$${cfg}_deps"
575         eval dep_any="\$${cfg}_deps_any"
576         eval dep_sel="\$${cfg}_select"
577         eval dep_sgs="\$${cfg}_suggest"
578         eval dep_ifa="\$${cfg}_if"
579         eval dep_ifn="\$${cfg}_if_any"
580
581         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
582         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
583         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
584
585         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
586         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
587         enabled_all  $dep_all || disable $cfg
588         enabled_any  $dep_any || disable $cfg
589         disabled_any $dep_sel && disable $cfg
590
591         if enabled $cfg; then
592             enable_deep $dep_sel
593             enable_deep_weak $dep_sgs
594         fi
595
596         disable ${cfg}_checking
597     done
598 }
599
600 check_deps(){
601     unset allopts
602
603     do_check_deps "$@"
604
605     for cfg in $allopts; do
606         enabled $cfg || continue
607         eval dep_extralibs="\$${cfg}_extralibs"
608         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
609     done
610 }
611
612 print_config(){
613     pfx=$1
614     files=$2
615     shift 2
616     map 'eval echo "$v \${$v:-no}"' "$@" |
617     awk "BEGIN { split(\"$files\", files) }
618         {
619             c = \"$pfx\" toupper(\$1);
620             v = \$2;
621             sub(/yes/, 1, v);
622             sub(/no/,  0, v);
623             for (f in files) {
624                 file = files[f];
625                 if (file ~ /\\.h\$/) {
626                     printf(\"#define %s %d\\n\", c, v) >>file;
627                 } else if (file ~ /\\.asm\$/) {
628                     printf(\"%%define %s %d\\n\", c, v) >>file;
629                 } else if (file ~ /\\.mak\$/) {
630                     n = -v ? \"\" : \"!\";
631                     printf(\"%s%s=yes\\n\", n, c) >>file;
632                 }
633             }
634         }"
635 }
636
637 print_enabled(){
638     suf=$1
639     shift
640     for v; do
641         enabled $v && printf "%s\n" ${v%$suf};
642     done
643 }
644
645 append(){
646     var=$1
647     shift
648     eval "$var=\"\$$var $*\""
649 }
650
651 prepend(){
652     var=$1
653     shift
654     eval "$var=\"$* \$$var\""
655 }
656
657 add_cppflags(){
658     append CPPFLAGS "$@"
659 }
660
661 add_cflags(){
662     append CFLAGS $($cflags_filter "$@")
663 }
664
665 add_asflags(){
666     append ASFLAGS $($asflags_filter "$@")
667 }
668
669 add_ldflags(){
670     append LDFLAGS $($ldflags_filter "$@")
671 }
672
673 add_stripflags(){
674     append STRIPFLAGS "$@"
675 }
676
677 add_extralibs(){
678     prepend extralibs $($ldflags_filter "$@")
679 }
680
681 add_host_cppflags(){
682     append host_cppflags "$@"
683 }
684
685 add_host_cflags(){
686     append host_cflags $($host_cflags_filter "$@")
687 }
688
689 add_host_ldflags(){
690     append host_ldflags $($host_ldflags_filter "$@")
691 }
692
693 add_compat(){
694     append compat_objs $1
695     shift
696     map 'add_cppflags -D$v' "$@"
697 }
698
699 check_cmd(){
700     log "$@"
701     "$@" >> $logfile 2>&1
702 }
703
704 cc_o(){
705     eval printf '%s\\n' $CC_O
706 }
707
708 cc_e(){
709     eval printf '%s\\n' $CC_E
710 }
711
712 check_cc(){
713     log check_cc "$@"
714     cat > $TMPC
715     log_file $TMPC
716     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
717 }
718
719 check_cpp(){
720     log check_cpp "$@"
721     cat > $TMPC
722     log_file $TMPC
723     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
724 }
725
726 as_o(){
727     eval printf '%s\\n' $AS_O
728 }
729
730 check_as(){
731     log check_as "$@"
732     cat > $TMPS
733     log_file $TMPS
734     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
735 }
736
737 check_inline_asm(){
738     log check_inline_asm "$@"
739     name="$1"
740     code="$2"
741     shift 2
742     disable $name
743     check_cc "$@" <<EOF && enable $name
744 void foo(void){ __asm__ volatile($code); }
745 EOF
746 }
747
748 check_insn(){
749     log check_insn "$@"
750     check_inline_asm ${1}_inline "\"$2\""
751     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
752 }
753
754 check_yasm(){
755     log check_yasm "$@"
756     echo "$1" > $TMPS
757     log_file $TMPS
758     shift 1
759     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
760 }
761
762 ld_o(){
763     eval printf '%s\\n' $LD_O
764 }
765
766 check_ld(){
767     log check_ld "$@"
768     flags=$(filter_out '-l*' "$@")
769     libs=$(filter '-l*' "$@")
770     check_cc $($cflags_filter $flags) || return
771     flags=$($ldflags_filter $flags)
772     libs=$($ldflags_filter $libs)
773     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
774 }
775
776 print_include(){
777     hdr=$1
778     test "${hdr%.h}" = "${hdr}" &&
779         echo "#include $hdr"    ||
780         echo "#include <$hdr>"
781 }
782
783 check_code(){
784     log check_code "$@"
785     check=$1
786     headers=$2
787     code=$3
788     shift 3
789     {
790         for hdr in $headers; do
791             print_include $hdr
792         done
793         echo "int main(void) { $code; return 0; }"
794     } | check_$check "$@"
795 }
796
797 check_cppflags(){
798     log check_cppflags "$@"
799     check_cc "$@" <<EOF && append CPPFLAGS "$@"
800 int x;
801 EOF
802 }
803
804 test_cflags(){
805     log test_cflags "$@"
806     set -- $($cflags_filter "$@")
807     check_cc "$@" <<EOF
808 int x;
809 EOF
810 }
811
812 check_cflags(){
813     log check_cflags "$@"
814     test_cflags "$@" && add_cflags "$@"
815 }
816
817 test_ldflags(){
818     log test_ldflags "$@"
819     check_ld "$@" <<EOF
820 int main(void){ return 0; }
821 EOF
822 }
823
824 check_ldflags(){
825     log check_ldflags "$@"
826     test_ldflags "$@" && add_ldflags "$@"
827 }
828
829 test_stripflags(){
830     log test_stripflags "$@"
831     # call check_cc to get a fresh TMPO
832     check_cc <<EOF
833 int main(void) { return 0; }
834 EOF
835     check_cmd $strip $STRIPFLAGS "$@" $TMPO
836 }
837
838 check_stripflags(){
839     log check_stripflags "$@"
840     test_stripflags "$@" && add_stripflags "$@"
841 }
842
843 check_header(){
844     log check_header "$@"
845     header=$1
846     shift
847     disable_safe $header
848     check_cpp "$@" <<EOF && enable_safe $header
849 #include <$header>
850 int x;
851 EOF
852 }
853
854 check_func(){
855     log check_func "$@"
856     func=$1
857     shift
858     disable $func
859     check_ld "$@" <<EOF && enable $func
860 extern int $func();
861 int main(void){ $func(); }
862 EOF
863 }
864
865 check_mathfunc(){
866     log check_mathfunc "$@"
867     func=$1
868     narg=$2
869     shift 2
870     test $narg = 2 && args="f, g" || args="f"
871     disable $func
872     check_ld "$@" <<EOF && enable $func
873 #include <math.h>
874 float foo(float f, float g) { return $func($args); }
875 int main(void){ return 0; }
876 EOF
877 }
878
879 check_func_headers(){
880     log check_func_headers "$@"
881     headers=$1
882     funcs=$2
883     shift 2
884     {
885         for hdr in $headers; do
886             print_include $hdr
887         done
888         for func in $funcs; do
889             echo "long check_$func(void) { return (long) $func; }"
890         done
891         echo "int main(void) { return 0; }"
892     } | check_ld "$@" && enable $funcs && enable_safe $headers
893 }
894
895 check_cpp_condition(){
896     log check_cpp_condition "$@"
897     header=$1
898     condition=$2
899     shift 2
900     check_cpp "$@" <<EOF
901 #include <$header>
902 #if !($condition)
903 #error "unsatisfied condition: $condition"
904 #endif
905 EOF
906 }
907
908 check_lib(){
909     log check_lib "$@"
910     header="$1"
911     func="$2"
912     shift 2
913     check_header $header && check_func $func "$@" && add_extralibs "$@"
914 }
915
916 check_lib2(){
917     log check_lib2 "$@"
918     headers="$1"
919     funcs="$2"
920     shift 2
921     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
922 }
923
924 check_pkg_config(){
925     log check_pkg_config "$@"
926     pkg="$1"
927     headers="$2"
928     funcs="$3"
929     shift 3
930     check_cmd $pkg_config --exists --print-errors $pkg || return
931     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
932     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
933     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
934         set_safe ${pkg}_cflags $pkg_cflags   &&
935         set_safe ${pkg}_libs   $pkg_libs
936 }
937
938 check_exec(){
939     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
940 }
941
942 check_exec_crash(){
943     code=$(cat)
944
945     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
946     # are safe but may not be available everywhere.  Thus we use
947     # raise(SIGTERM) instead.  The check is run in a subshell so we
948     # can redirect the "Terminated" message from the shell.  SIGBUS
949     # is not defined by standard C so it is used conditionally.
950
951     (check_exec "$@") >> $logfile 2>&1 <<EOF
952 #include <signal.h>
953 static void sighandler(int sig){
954     raise(SIGTERM);
955 }
956 int foo(void){
957     $code
958 }
959 int (*func_ptr)(void) = foo;
960 int main(void){
961     signal(SIGILL, sighandler);
962     signal(SIGFPE, sighandler);
963     signal(SIGSEGV, sighandler);
964 #ifdef SIGBUS
965     signal(SIGBUS, sighandler);
966 #endif
967     return func_ptr();
968 }
969 EOF
970 }
971
972 check_type(){
973     log check_type "$@"
974     headers=$1
975     type=$2
976     shift 2
977     disable_safe "$type"
978     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
979 }
980
981 check_struct(){
982     log check_struct "$@"
983     headers=$1
984     struct=$2
985     member=$3
986     shift 3
987     disable_safe "${struct}_${member}"
988     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
989         enable_safe "${struct}_${member}"
990 }
991
992 check_builtin(){
993     log check_builtin "$@"
994     name=$1
995     headers=$2
996     builtin=$3
997     shift 3
998     disable "$name"
999     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1000 }
1001
1002 check_compile_assert(){
1003     log check_compile_assert "$@"
1004     name=$1
1005     headers=$2
1006     condition=$3
1007     shift 3
1008     disable "$name"
1009     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1010 }
1011
1012 require(){
1013     name="$1"
1014     header="$2"
1015     func="$3"
1016     shift 3
1017     check_lib $header $func "$@" || die "ERROR: $name not found"
1018 }
1019
1020 require2(){
1021     name="$1"
1022     headers="$2"
1023     func="$3"
1024     shift 3
1025     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1026 }
1027
1028 require_pkg_config(){
1029     pkg="$1"
1030     check_pkg_config "$@" || die "ERROR: $pkg not found"
1031     add_cflags    $(get_safe ${pkg}_cflags)
1032     add_extralibs $(get_safe ${pkg}_libs)
1033 }
1034
1035 hostcc_e(){
1036     eval printf '%s\\n' $HOSTCC_E
1037 }
1038
1039 hostcc_o(){
1040     eval printf '%s\\n' $HOSTCC_O
1041 }
1042
1043 check_host_cc(){
1044     log check_host_cc "$@"
1045     cat > $TMPC
1046     log_file $TMPC
1047     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1048 }
1049
1050 check_host_cpp(){
1051     log check_host_cpp "$@"
1052     cat > $TMPC
1053     log_file $TMPC
1054     check_cmd $host_cc $HOSTCPPFLAGS $HOSTCFLAGS "$@" $(hostcc_e $TMPO) $TMPC
1055 }
1056
1057 check_host_cppflags(){
1058     log check_host_cppflags "$@"
1059     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1060 int x;
1061 EOF
1062 }
1063
1064 check_host_cflags(){
1065     log check_host_cflags "$@"
1066     set -- $($host_cflags_filter "$@")
1067     check_host_cc "$@" <<EOF && append host_cflags "$@"
1068 int x;
1069 EOF
1070 }
1071
1072 check_host_cpp_condition(){
1073     log check_host_cpp_condition "$@"
1074     header=$1
1075     condition=$2
1076     shift 2
1077     check_host_cpp "$@" <<EOF
1078 #include <$header>
1079 #if !($condition)
1080 #error "unsatisfied condition: $condition"
1081 #endif
1082 EOF
1083 }
1084
1085 apply(){
1086     file=$1
1087     shift
1088     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1089 }
1090
1091 cp_if_changed(){
1092     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1093     mkdir -p "$(dirname $2)"
1094     $cp_f "$1" "$2"
1095 }
1096
1097 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1098 # system-dependent things.
1099
1100 COMPONENT_LIST="
1101     bsfs
1102     decoders
1103     demuxers
1104     encoders
1105     filters
1106     hwaccels
1107     indevs
1108     muxers
1109     outdevs
1110     parsers
1111     protocols
1112 "
1113
1114 EXAMPLE_LIST="
1115     avcodec_example
1116     filter_audio_example
1117     metadata_example
1118     output_example
1119     transcode_aac_example
1120 "
1121
1122 EXTERNAL_LIBRARY_LIST="
1123     avisynth
1124     bzlib
1125     frei0r
1126     gnutls
1127     libcdio
1128     libdc1394
1129     libfaac
1130     libfdk_aac
1131     libfreetype
1132     libgsm
1133     libilbc
1134     libmp3lame
1135     libopencore_amrnb
1136     libopencore_amrwb
1137     libopencv
1138     libopenjpeg
1139     libopus
1140     libpulse
1141     librtmp
1142     libschroedinger
1143     libspeex
1144     libtheora
1145     libvo_aacenc
1146     libvo_amrwbenc
1147     libvorbis
1148     libvpx
1149     libwavpack
1150     libwebp
1151     libx264
1152     libx265
1153     libxavs
1154     libxvid
1155     openssl
1156     x11grab
1157     zlib
1158 "
1159
1160 HWACCEL_LIST="
1161     dxva2
1162     vaapi
1163     vda
1164     vdpau
1165 "
1166
1167 LIBRARY_LIST="
1168     avcodec
1169     avdevice
1170     avfilter
1171     avformat
1172     avresample
1173     avutil
1174     swscale
1175 "
1176
1177 PROGRAM_LIST="
1178     avconv
1179     avplay
1180     avprobe
1181     avserver
1182 "
1183
1184 CONFIG_LIST="
1185     $COMPONENT_LIST
1186     $EXAMPLE_LIST
1187     $EXTERNAL_LIBRARY_LIST
1188     $HWACCEL_LIST
1189     $LIBRARY_LIST
1190     $PROGRAM_LIST
1191     dct
1192     doc
1193     error_resilience
1194     fft
1195     gpl
1196     gray
1197     hardcoded_tables
1198     lsp
1199     lzo
1200     mdct
1201     memalign_hack
1202     neon_clobber_test
1203     network
1204     nonfree
1205     pic
1206     pod2man
1207     rdft
1208     runtime_cpudetect
1209     safe_bitstream_reader
1210     shared
1211     small
1212     sram
1213     static
1214     swscale_alpha
1215     texi2html
1216     thumb
1217     version3
1218     xmm_clobber_test
1219 "
1220
1221 THREADS_LIST="
1222     pthreads
1223     w32threads
1224 "
1225
1226 ATOMICS_LIST="
1227     atomics_gcc
1228     atomics_suncc
1229     atomics_win32
1230 "
1231
1232 ARCH_LIST="
1233     aarch64
1234     alpha
1235     arm
1236     avr32
1237     avr32_ap
1238     avr32_uc
1239     bfin
1240     ia64
1241     m68k
1242     mips
1243     mips64
1244     parisc
1245     ppc
1246     ppc64
1247     s390
1248     sh4
1249     sparc
1250     sparc64
1251     tilegx
1252     tilepro
1253     tomi
1254     x86
1255     x86_32
1256     x86_64
1257 "
1258
1259 ARCH_EXT_LIST_ARM="
1260     armv5te
1261     armv6
1262     armv6t2
1263     neon
1264     vfp
1265     vfpv3
1266 "
1267
1268 ARCH_EXT_LIST_X86_SIMD="
1269     amd3dnow
1270     amd3dnowext
1271     avx
1272     avx2
1273     fma3
1274     fma4
1275     mmx
1276     mmxext
1277     sse
1278     sse2
1279     sse3
1280     sse4
1281     sse42
1282     ssse3
1283     xop
1284 "
1285
1286 ARCH_EXT_LIST_X86="
1287     $ARCH_EXT_LIST_X86_SIMD
1288     cpunop
1289     i686
1290 "
1291
1292 ARCH_EXT_LIST="
1293     $ARCH_EXT_LIST_ARM
1294     $ARCH_EXT_LIST_X86
1295     altivec
1296     ppc4xx
1297     vis
1298 "
1299
1300 HAVE_LIST_CMDLINE="
1301     inline_asm
1302     symver
1303     yasm
1304 "
1305
1306 HAVE_LIST_PUB="
1307     bigendian
1308     fast_unaligned
1309 "
1310
1311 MATH_FUNCS="
1312     atanf
1313     atan2f
1314     cbrtf
1315     cosf
1316     exp2
1317     exp2f
1318     expf
1319     isinf
1320     isnan
1321     ldexpf
1322     llrint
1323     llrintf
1324     log2
1325     log2f
1326     log10f
1327     lrint
1328     lrintf
1329     powf
1330     rint
1331     round
1332     roundf
1333     sinf
1334     trunc
1335     truncf
1336 "
1337
1338 HAVE_LIST="
1339     $ARCH_EXT_LIST
1340     $(add_suffix _external $ARCH_EXT_LIST)
1341     $(add_suffix _inline   $ARCH_EXT_LIST)
1342     $ATOMICS_LIST
1343     $HAVE_LIST_CMDLINE
1344     $HAVE_LIST_PUB
1345     $MATH_FUNCS
1346     $THREADS_LIST
1347     aligned_malloc
1348     aligned_stack
1349     alsa_asoundlib_h
1350     altivec_h
1351     arpa_inet_h
1352     asm_mod_q
1353     atomic_cas_ptr
1354     atomics_native
1355     attribute_may_alias
1356     attribute_packed
1357     cdio_paranoia_h
1358     cdio_paranoia_paranoia_h
1359     closesocket
1360     CommandLineToArgvW
1361     CryptGenRandom
1362     dcbzl
1363     dev_bktr_ioctl_bt848_h
1364     dev_bktr_ioctl_meteor_h
1365     dev_ic_bt8xx_h
1366     dev_video_bktr_ioctl_bt848_h
1367     dev_video_meteor_ioctl_meteor_h
1368     direct_h
1369     dlfcn_h
1370     dlopen
1371     dos_paths
1372     dxva_h
1373     ebp_available
1374     ebx_available
1375     fast_64bit
1376     fast_clz
1377     fast_cmov
1378     fcntl
1379     flt_lim
1380     fork
1381     getaddrinfo
1382     gethrtime
1383     getopt
1384     GetProcessAffinityMask
1385     GetProcessMemoryInfo
1386     GetProcessTimes
1387     getrusage
1388     getservbyport
1389     GetSystemTimeAsFileTime
1390     gettimeofday
1391     gnu_as
1392     gsm_h
1393     ibm_asm
1394     inet_aton
1395     inline_asm_labels
1396     io_h
1397     isatty
1398     jack_port_get_latency_range
1399     ldbrx
1400     libc_msvcrt
1401     libdc1394_1
1402     libdc1394_2
1403     local_aligned_16
1404     local_aligned_8
1405     localtime_r
1406     loongson
1407     mach_absolute_time
1408     mach_mach_time_h
1409     machine_ioctl_bt848_h
1410     machine_ioctl_meteor_h
1411     machine_rw_barrier
1412     malloc_h
1413     MapViewOfFile
1414     memalign
1415     MemoryBarrier
1416     mkstemp
1417     mm_empty
1418     mmap
1419     mprotect
1420     nanosleep
1421     poll_h
1422     posix_memalign
1423     pragma_deprecated
1424     rdtsc
1425     sched_getaffinity
1426     sdl
1427     SetConsoleTextAttribute
1428     setmode
1429     setrlimit
1430     Sleep
1431     sndio_h
1432     socklen_t
1433     soundcard_h
1434     strerror_r
1435     strptime
1436     struct_addrinfo
1437     struct_group_source_req
1438     struct_ip_mreq_source
1439     struct_ipv6_mreq
1440     struct_pollfd
1441     struct_rusage_ru_maxrss
1442     struct_sockaddr_in6
1443     struct_sockaddr_sa_len
1444     struct_sockaddr_storage
1445     struct_v4l2_frmivalenum_discrete
1446     symver_asm_label
1447     symver_gnu_asm
1448     sync_val_compare_and_swap
1449     sys_mman_h
1450     sys_param_h
1451     sys_resource_h
1452     sys_select_h
1453     sys_soundcard_h
1454     sys_time_h
1455     sys_un_h
1456     sys_videoio_h
1457     sysconf
1458     sysctl
1459     threads
1460     unistd_h
1461     usleep
1462     vdpau_x11
1463     vfp_args
1464     VirtualAlloc
1465     windows_h
1466     winsock2_h
1467     xform_asm
1468     xlib
1469     xmm_clobbers
1470 "
1471
1472 # options emitted with CONFIG_ prefix but not available on the command line
1473 CONFIG_EXTRA="
1474     aandcttables
1475     ac3dsp
1476     audio_frame_queue
1477     dsputil
1478     gcrypt
1479     golomb
1480     gplv3
1481     h263dsp
1482     h264chroma
1483     h264dsp
1484     h264pred
1485     h264qpel
1486     hpeldsp
1487     huffman
1488     intrax8
1489     lgplv3
1490     lpc
1491     mpegaudio
1492     mpegaudiodsp
1493     mpegvideo
1494     mpegvideoenc
1495     nettle
1496     rangecoder
1497     riffdec
1498     riffenc
1499     rtpdec
1500     rtpenc_chain
1501     sinewin
1502     videodsp
1503     vp3dsp
1504 "
1505
1506 CMDLINE_SELECT="
1507     $ARCH_EXT_LIST
1508     $CONFIG_LIST
1509     $HAVE_LIST_CMDLINE
1510     $THREADS_LIST
1511     asm
1512     cross_compile
1513     debug
1514     extra_warnings
1515     logging
1516     lto
1517     optimizations
1518 "
1519
1520 PATHS_LIST="
1521     bindir
1522     datadir
1523     docdir
1524     incdir
1525     libdir
1526     mandir
1527     prefix
1528     shlibdir
1529 "
1530
1531 CMDLINE_SET="
1532     $PATHS_LIST
1533     ar
1534     arch
1535     as
1536     build_suffix
1537     cc
1538     cpu
1539     cross_prefix
1540     dep_cc
1541     extra_version
1542     host_cc
1543     host_cflags
1544     host_ld
1545     host_ldflags
1546     host_libs
1547     host_os
1548     ld
1549     logfile
1550     malloc_prefix
1551     nm
1552     optflags
1553     pkg_config
1554     pkg_config_flags
1555     random_seed
1556     samples
1557     sysinclude
1558     sysroot
1559     target_exec
1560     target_os
1561     target_path
1562     target_samples
1563     toolchain
1564 "
1565
1566 CMDLINE_APPEND="
1567     extra_cflags
1568     host_cppflags
1569 "
1570
1571 # code dependency declarations
1572
1573 # architecture extensions
1574
1575 armv5te_deps="arm"
1576 armv6_deps="arm"
1577 armv6t2_deps="arm"
1578 neon_deps_any="aarch64 arm"
1579 vfp_deps_any="aarch64 arm"
1580 vfpv3_deps="vfp"
1581
1582 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1583
1584 altivec_deps="ppc"
1585 ppc4xx_deps="ppc"
1586
1587 vis_deps="sparc"
1588
1589 cpunop_deps="i686"
1590 x86_64_select="i686"
1591 x86_64_suggest="fast_cmov"
1592
1593 amd3dnow_deps="mmx"
1594 amd3dnowext_deps="amd3dnow"
1595 i686_deps="x86"
1596 mmx_deps="x86"
1597 mmxext_deps="mmx"
1598 sse_deps="mmxext"
1599 sse2_deps="sse"
1600 sse3_deps="sse2"
1601 ssse3_deps="sse3"
1602 sse4_deps="ssse3"
1603 sse42_deps="sse4"
1604 avx_deps="sse42"
1605 xop_deps="avx"
1606 fma3_deps="avx"
1607 fma4_deps="avx"
1608 avx2_deps="avx"
1609
1610 mmx_external_deps="yasm"
1611 mmx_inline_deps="inline_asm"
1612 mmx_suggest="mmx_external mmx_inline"
1613
1614 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1615     eval dep=\$${ext}_deps
1616     eval ${ext}_external_deps='"${dep}_external"'
1617     eval ${ext}_inline_deps='"${dep}_inline"'
1618     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1619 done
1620
1621 aligned_stack_if_any="aarch64 ppc x86"
1622 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1623 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1624 fast_unaligned_if_any="aarch64 ppc x86"
1625
1626 need_memalign="altivec neon sse"
1627
1628 # system capabilities
1629 log2_deps="!libc_msvcrt"
1630
1631 symver_if_any="symver_asm_label symver_gnu_asm"
1632
1633 # threading support
1634 atomics_gcc_if="sync_val_compare_and_swap"
1635 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1636 atomics_win32_if="MemoryBarrier"
1637 atomics_native_if_any="$ATOMICS_LIST"
1638 w32threads_deps="atomics_native"
1639 threads_if_any="$THREADS_LIST"
1640
1641 # subsystems
1642 dct_select="rdft"
1643 error_resilience_select="dsputil"
1644 lpc_select="dsputil"
1645 mdct_select="fft"
1646 rdft_select="fft"
1647 mpegaudio_select="mpegaudiodsp"
1648 mpegaudiodsp_select="dct"
1649 mpegvideo_select="dsputil hpeldsp videodsp"
1650 mpegvideoenc_select="mpegvideo"
1651
1652 # decoders / encoders
1653 aac_decoder_select="mdct sinewin"
1654 aac_encoder_select="audio_frame_queue mdct sinewin"
1655 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1656 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1657 ac3_encoder_select="mdct ac3dsp dsputil"
1658 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1659 aic_decoder_select="dsputil golomb"
1660 alac_encoder_select="lpc"
1661 als_decoder_select="dsputil"
1662 amrnb_decoder_select="lsp"
1663 amrwb_decoder_select="lsp"
1664 amv_decoder_select="sp5x_decoder"
1665 ape_decoder_select="dsputil"
1666 asv1_decoder_select="dsputil"
1667 asv1_encoder_select="dsputil"
1668 asv2_decoder_select="dsputil"
1669 asv2_encoder_select="dsputil"
1670 atrac1_decoder_select="mdct sinewin"
1671 atrac3_decoder_select="mdct"
1672 atrac3p_decoder_select="mdct sinewin"
1673 bink_decoder_select="dsputil hpeldsp"
1674 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
1675 binkaudio_rdft_decoder_select="mdct rdft sinewin"
1676 cavs_decoder_select="dsputil golomb h264chroma videodsp"
1677 cllc_decoder_select="dsputil"
1678 comfortnoise_encoder_select="lpc"
1679 cook_decoder_select="dsputil mdct sinewin"
1680 cscd_decoder_select="lzo"
1681 cscd_decoder_suggest="zlib"
1682 dca_decoder_select="mdct"
1683 dnxhd_decoder_select="dsputil"
1684 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
1685 dvvideo_decoder_select="dsputil"
1686 dvvideo_encoder_select="dsputil"
1687 dxa_decoder_deps="zlib"
1688 eac3_decoder_select="ac3_decoder"
1689 eac3_encoder_select="ac3_encoder"
1690 eamad_decoder_select="aandcttables dsputil mpegvideo"
1691 eatgq_decoder_select="aandcttables dsputil"
1692 eatqi_decoder_select="aandcttables error_resilience mpegvideo"
1693 ffv1_decoder_select="dsputil golomb rangecoder"
1694 ffv1_encoder_select="dsputil rangecoder"
1695 ffvhuff_decoder_select="huffyuv_decoder"
1696 ffvhuff_encoder_select="huffyuv_encoder"
1697 fic_decoder_select="dsputil golomb"
1698 flac_decoder_select="golomb"
1699 flac_encoder_select="dsputil golomb lpc"
1700 flashsv_decoder_deps="zlib"
1701 flashsv_encoder_deps="zlib"
1702 flashsv2_decoder_deps="zlib"
1703 flv_decoder_select="h263_decoder"
1704 flv_encoder_select="h263_encoder"
1705 fourxm_decoder_select="dsputil"
1706 fraps_decoder_select="dsputil huffman"
1707 g2m_decoder_deps="zlib"
1708 g2m_decoder_select="dsputil"
1709 h261_decoder_select="error_resilience mpegvideo"
1710 h261_encoder_select="aandcttables mpegvideoenc"
1711 h263_decoder_select="error_resilience h263_parser h263dsp mpegvideo"
1712 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1713 h263i_decoder_select="h263_decoder"
1714 h263p_encoder_select="h263_encoder"
1715 h264_decoder_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1716 h264_decoder_suggest="error_resilience"
1717 hevc_decoder_select="dsputil golomb videodsp"
1718 huffyuv_decoder_select="dsputil"
1719 huffyuv_encoder_select="dsputil huffman"
1720 iac_decoder_select="imc_decoder"
1721 imc_decoder_select="dsputil fft mdct sinewin"
1722 indeo3_decoder_select="hpeldsp"
1723 interplay_video_decoder_select="hpeldsp"
1724 jpegls_decoder_select="golomb mjpeg_decoder"
1725 jpegls_encoder_select="golomb"
1726 jv_decoder_select="dsputil"
1727 lagarith_decoder_select="dsputil"
1728 ljpeg_encoder_select="aandcttables mpegvideoenc"
1729 loco_decoder_select="golomb"
1730 mdec_decoder_select="dsputil error_resilience mpegvideo"
1731 metasound_decoder_select="lsp mdct sinewin"
1732 mimic_decoder_select="dsputil hpeldsp"
1733 mjpeg_decoder_select="dsputil hpeldsp"
1734 mjpeg_encoder_select="aandcttables dsputil mpegvideoenc"
1735 mjpegb_decoder_select="mjpeg_decoder"
1736 mlp_decoder_select="mlp_parser"
1737 motionpixels_decoder_select="dsputil"
1738 mp1_decoder_select="mpegaudio"
1739 mp1float_decoder_select="mpegaudio"
1740 mp2_decoder_select="mpegaudio"
1741 mp2float_decoder_select="mpegaudio"
1742 mp3_decoder_select="mpegaudio"
1743 mp3adu_decoder_select="mpegaudio"
1744 mp3adufloat_decoder_select="mpegaudio"
1745 mp3float_decoder_select="mpegaudio"
1746 mp3on4_decoder_select="mpegaudio"
1747 mp3on4float_decoder_select="mpegaudio"
1748 mpc7_decoder_select="dsputil mpegaudiodsp"
1749 mpc8_decoder_select="mpegaudiodsp"
1750 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1751 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1752 mpeg1video_decoder_select="error_resilience mpegvideo"
1753 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1754 mpeg2video_decoder_select="error_resilience mpegvideo"
1755 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1756 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1757 mpeg4_encoder_select="h263_encoder"
1758 msmpeg4v1_decoder_select="h263_decoder"
1759 msmpeg4v2_decoder_select="h263_decoder"
1760 msmpeg4v2_encoder_select="h263_encoder"
1761 msmpeg4v3_decoder_select="h263_decoder"
1762 msmpeg4v3_encoder_select="h263_encoder"
1763 mss2_decoder_select="error_resilience vc1_decoder"
1764 mxpeg_decoder_select="mjpeg_decoder"
1765 nellymoser_decoder_select="mdct sinewin"
1766 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1767 nuv_decoder_select="dsputil lzo"
1768 png_decoder_deps="zlib"
1769 png_encoder_deps="zlib"
1770 png_encoder_select="dsputil"
1771 prores_decoder_select="dsputil"
1772 prores_encoder_select="dsputil"
1773 qcelp_decoder_select="lsp"
1774 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1775 ra_144_encoder_select="audio_frame_queue lpc"
1776 ralf_decoder_select="golomb"
1777 rv10_decoder_select="error_resilience h263_decoder h263dsp"
1778 rv10_encoder_select="h263_encoder"
1779 rv20_decoder_select="error_resilience h263_decoder h263dsp"
1780 rv20_encoder_select="h263_encoder"
1781 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1782 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1783 shorten_decoder_select="golomb"
1784 sipr_decoder_select="lsp"
1785 sp5x_decoder_select="mjpeg_decoder"
1786 svq1_decoder_select="hpeldsp"
1787 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
1788 svq3_decoder_select="h264_decoder hpeldsp mpegvideo"
1789 svq3_decoder_suggest="zlib"
1790 tak_decoder_select="dsputil"
1791 theora_decoder_select="vp3_decoder"
1792 thp_decoder_select="mjpeg_decoder"
1793 tiff_decoder_suggest="zlib"
1794 tiff_encoder_suggest="zlib"
1795 truehd_decoder_select="mlp_decoder"
1796 truemotion2_decoder_select="dsputil"
1797 truespeech_decoder_select="dsputil"
1798 tscc_decoder_deps="zlib"
1799 twinvq_decoder_select="mdct lsp sinewin"
1800 utvideo_decoder_select="dsputil"
1801 utvideo_encoder_select="dsputil huffman"
1802 vble_decoder_select="dsputil"
1803 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel intrax8"
1804 vc1image_decoder_select="vc1_decoder"
1805 vorbis_decoder_select="mdct"
1806 vorbis_encoder_select="mdct"
1807 vp3_decoder_select="hpeldsp vp3dsp videodsp"
1808 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
1809 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
1810 vp6a_decoder_select="vp6_decoder"
1811 vp6f_decoder_select="vp6_decoder"
1812 vp8_decoder_select="h264pred videodsp"
1813 vp9_decoder_select="videodsp"
1814 webp_decoder_select="vp8_decoder"
1815 wmapro_decoder_select="mdct sinewin"
1816 wmav1_decoder_select="mdct sinewin"
1817 wmav1_encoder_select="mdct sinewin"
1818 wmav2_decoder_select="mdct sinewin"
1819 wmav2_encoder_select="mdct sinewin"
1820 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
1821 wmv1_decoder_select="h263_decoder"
1822 wmv1_encoder_select="h263_encoder"
1823 wmv2_decoder_select="h263_decoder intrax8 videodsp"
1824 wmv2_encoder_select="h263_encoder"
1825 wmv3_decoder_select="vc1_decoder"
1826 wmv3image_decoder_select="wmv3_decoder"
1827 zerocodec_decoder_deps="zlib"
1828 zlib_decoder_deps="zlib"
1829 zlib_encoder_deps="zlib"
1830 zmbv_decoder_deps="zlib"
1831 zmbv_encoder_deps="zlib"
1832
1833 # hardware accelerators
1834 dxva2_deps="dxva2api_h"
1835 vaapi_deps="va_va_h"
1836 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
1837 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
1838 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
1839
1840 h263_vaapi_hwaccel_deps="vaapi"
1841 h263_vaapi_hwaccel_select="h263_decoder"
1842 h263_vdpau_hwaccel_deps="vdpau"
1843 h263_vdpau_hwaccel_select="h263_decoder"
1844 h264_dxva2_hwaccel_deps="dxva2"
1845 h264_dxva2_hwaccel_select="h264_decoder"
1846 h264_vaapi_hwaccel_deps="vaapi"
1847 h264_vaapi_hwaccel_select="h264_decoder"
1848 h264_vda_hwaccel_deps="vda"
1849 h264_vda_hwaccel_select="h264_decoder"
1850 h264_vdpau_hwaccel_deps="vdpau"
1851 h264_vdpau_hwaccel_select="h264_decoder"
1852 mpeg1_vdpau_hwaccel_deps="vdpau"
1853 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
1854 mpeg2_dxva2_hwaccel_deps="dxva2"
1855 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
1856 mpeg2_vaapi_hwaccel_deps="vaapi"
1857 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
1858 mpeg2_vdpau_hwaccel_deps="vdpau"
1859 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
1860 mpeg4_vaapi_hwaccel_deps="vaapi"
1861 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
1862 mpeg4_vdpau_hwaccel_deps="vdpau"
1863 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
1864 vc1_dxva2_hwaccel_deps="dxva2"
1865 vc1_dxva2_hwaccel_select="vc1_decoder"
1866 vc1_vaapi_hwaccel_deps="vaapi"
1867 vc1_vaapi_hwaccel_select="vc1_decoder"
1868 vc1_vdpau_hwaccel_deps="vdpau"
1869 vc1_vdpau_hwaccel_select="vc1_decoder"
1870 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
1871 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
1872 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
1873
1874 # parsers
1875 h264_parser_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1876 mpeg4video_parser_select="error_resilience h263dsp mpegvideo"
1877 mpegvideo_parser_select="error_resilience mpegvideo"
1878 vc1_parser_select="mpegvideo"
1879
1880 # external libraries
1881 libfaac_encoder_deps="libfaac"
1882 libfaac_encoder_select="audio_frame_queue"
1883 libfdk_aac_decoder_deps="libfdk_aac"
1884 libfdk_aac_encoder_deps="libfdk_aac"
1885 libfdk_aac_encoder_select="audio_frame_queue"
1886 libgsm_decoder_deps="libgsm"
1887 libgsm_encoder_deps="libgsm"
1888 libgsm_ms_decoder_deps="libgsm"
1889 libgsm_ms_encoder_deps="libgsm"
1890 libilbc_decoder_deps="libilbc"
1891 libilbc_encoder_deps="libilbc"
1892 libmp3lame_encoder_deps="libmp3lame"
1893 libmp3lame_encoder_select="audio_frame_queue"
1894 libopencore_amrnb_decoder_deps="libopencore_amrnb"
1895 libopencore_amrnb_encoder_deps="libopencore_amrnb"
1896 libopencore_amrnb_encoder_select="audio_frame_queue"
1897 libopencore_amrwb_decoder_deps="libopencore_amrwb"
1898 libopenjpeg_decoder_deps="libopenjpeg"
1899 libopenjpeg_encoder_deps="libopenjpeg"
1900 libopus_decoder_deps="libopus"
1901 libopus_encoder_deps="libopus"
1902 libopus_encoder_select="audio_frame_queue"
1903 libschroedinger_decoder_deps="libschroedinger"
1904 libschroedinger_encoder_deps="libschroedinger"
1905 libspeex_decoder_deps="libspeex"
1906 libspeex_encoder_deps="libspeex"
1907 libspeex_encoder_select="audio_frame_queue"
1908 libtheora_encoder_deps="libtheora"
1909 libvo_aacenc_encoder_deps="libvo_aacenc"
1910 libvo_aacenc_encoder_select="audio_frame_queue"
1911 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
1912 libvorbis_encoder_deps="libvorbis"
1913 libvorbis_encoder_select="audio_frame_queue"
1914 libvpx_vp8_decoder_deps="libvpx"
1915 libvpx_vp8_encoder_deps="libvpx"
1916 libvpx_vp9_decoder_deps="libvpx"
1917 libvpx_vp9_encoder_deps="libvpx"
1918 libwavpack_encoder_deps="libwavpack"
1919 libwebp_encoder_deps="libwebp"
1920 libx264_encoder_deps="libx264"
1921 libx265_encoder_deps="libx265"
1922 libxavs_encoder_deps="libxavs"
1923 libxvid_encoder_deps="libxvid"
1924
1925 # demuxers / muxers
1926 ac3_demuxer_select="ac3_parser"
1927 asf_demuxer_select="riffdec"
1928 asf_muxer_select="riffenc"
1929 asf_stream_muxer_select="asf_muxer"
1930 avi_demuxer_select="riffdec"
1931 avi_muxer_select="riffenc"
1932 avisynth_demuxer_deps="avisynth"
1933 avisynth_demuxer_select="riffdec"
1934 caf_demuxer_select="riffdec"
1935 dirac_demuxer_select="dirac_parser"
1936 dxa_demuxer_select="riffdec"
1937 eac3_demuxer_select="ac3_parser"
1938 f4v_muxer_select="mov_muxer"
1939 flac_demuxer_select="flac_parser"
1940 hds_muxer_select="flv_muxer"
1941 hls_muxer_select="mpegts_muxer"
1942 ipod_muxer_select="mov_muxer"
1943 ismv_muxer_select="mov_muxer"
1944 matroska_audio_muxer_select="matroska_muxer"
1945 matroska_demuxer_select="riffdec"
1946 matroska_demuxer_suggest="bzlib lzo zlib"
1947 matroska_muxer_select="riffenc"
1948 mmf_muxer_select="riffenc"
1949 mov_demuxer_select="riffdec"
1950 mov_demuxer_suggest="zlib"
1951 mov_muxer_select="riffenc rtpenc_chain"
1952 mp3_demuxer_select="mpegaudio_parser"
1953 mp4_muxer_select="mov_muxer"
1954 mpegts_muxer_select="adts_muxer latm_muxer"
1955 mpegtsraw_demuxer_select="mpegts_demuxer"
1956 mxf_d10_muxer_select="mxf_muxer"
1957 nut_muxer_select="riffenc"
1958 nuv_demuxer_select="riffdec"
1959 ogg_demuxer_select="golomb"
1960 psp_muxer_select="mov_muxer"
1961 rtp_demuxer_select="sdp_demuxer"
1962 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
1963 rtsp_demuxer_select="http_protocol rtpdec"
1964 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
1965 sap_demuxer_select="sdp_demuxer"
1966 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
1967 sdp_demuxer_select="rtpdec"
1968 smoothstreaming_muxer_select="ismv_muxer"
1969 spdif_muxer_select="aac_parser"
1970 tak_demuxer_select="tak_parser"
1971 tg2_muxer_select="mov_muxer"
1972 tgp_muxer_select="mov_muxer"
1973 w64_demuxer_select="wav_demuxer"
1974 wav_demuxer_select="riffdec"
1975 wav_muxer_select="riffenc"
1976 webm_muxer_select="riffenc"
1977 wtv_demuxer_select="riffdec"
1978 xmv_demuxer_select="riffdec"
1979 xwma_demuxer_select="riffdec"
1980
1981 # indevs / outdevs
1982 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
1983 alsa_outdev_deps="alsa_asoundlib_h"
1984 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
1985 dv1394_indev_deps="dv1394"
1986 dv1394_indev_select="dv_demuxer"
1987 fbdev_indev_deps="linux_fb_h"
1988 jack_indev_deps="jack_jack_h pthreads"
1989 libcdio_indev_deps="libcdio"
1990 libdc1394_indev_deps="libdc1394"
1991 oss_indev_deps_any="soundcard_h sys_soundcard_h"
1992 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
1993 pulse_indev_deps="libpulse"
1994 sndio_indev_deps="sndio_h"
1995 sndio_outdev_deps="sndio_h"
1996 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
1997 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
1998 vfwcap_indev_extralibs="-lavicap32"
1999 x11grab_indev_deps="x11grab XShmCreateImage"
2000
2001 # protocols
2002 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2003 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2004 ffrtmpcrypt_protocol_select="tcp_protocol"
2005 ffrtmphttp_protocol_deps="!librtmp_protocol"
2006 ffrtmphttp_protocol_select="http_protocol"
2007 gopher_protocol_select="network"
2008 http_protocol_select="tcp_protocol"
2009 httpproxy_protocol_select="tcp_protocol"
2010 https_protocol_select="tls_protocol"
2011 librtmp_protocol_deps="librtmp"
2012 librtmpe_protocol_deps="librtmp"
2013 librtmps_protocol_deps="librtmp"
2014 librtmpt_protocol_deps="librtmp"
2015 librtmpte_protocol_deps="librtmp"
2016 mmsh_protocol_select="http_protocol"
2017 mmst_protocol_select="network"
2018 rtmp_protocol_deps="!librtmp_protocol"
2019 rtmp_protocol_select="tcp_protocol"
2020 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2021 rtmps_protocol_deps="!librtmp_protocol"
2022 rtmps_protocol_select="tls_protocol"
2023 rtmpt_protocol_select="ffrtmphttp_protocol"
2024 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2025 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2026 rtp_protocol_select="udp_protocol"
2027 sctp_protocol_deps="struct_sctp_event_subscribe"
2028 sctp_protocol_select="network"
2029 srtp_protocol_select="rtp_protocol"
2030 tcp_protocol_select="network"
2031 tls_protocol_deps_any="openssl gnutls"
2032 tls_protocol_select="tcp_protocol"
2033 udp_protocol_select="network"
2034 unix_protocol_deps="sys_un_h"
2035 unix_protocol_select="network"
2036
2037 # filters
2038 blackframe_filter_deps="gpl"
2039 boxblur_filter_deps="gpl"
2040 cropdetect_filter_deps="gpl"
2041 delogo_filter_deps="gpl"
2042 drawtext_filter_deps="libfreetype"
2043 frei0r_filter_deps="frei0r dlopen"
2044 frei0r_filter_extralibs='$ldl'
2045 frei0r_src_filter_deps="frei0r dlopen"
2046 frei0r_src_filter_extralibs='$ldl'
2047 hqdn3d_filter_deps="gpl"
2048 interlace_filter_deps="gpl"
2049 ocv_filter_deps="libopencv"
2050 resample_filter_deps="avresample"
2051 scale_filter_deps="swscale"
2052
2053 # examples
2054 avcodec_example_deps="avcodec avutil"
2055 filter_audio_example_deps="avfilter avutil"
2056 metadata_example_deps="avformat avutil"
2057 output_example_deps="avcodec avformat avutil swscale"
2058 transcode_aac_example_deps="avcodec avformat avresample"
2059
2060 # libraries
2061 avcodec_deps="avutil"
2062 avdevice_deps="avutil avcodec avformat"
2063 avfilter_deps="avutil"
2064 avformat_deps="avutil avcodec"
2065 avresample_deps="avutil"
2066 swscale_deps="avutil"
2067
2068 # programs
2069 avconv_deps="avcodec avfilter avformat avresample swscale"
2070 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2071                fps_filter null_filter resample_filter scale_filter
2072                setpts_filter trim_filter"
2073 avplay_deps="avcodec avformat avresample swscale sdl"
2074 avplay_libs='$sdl_libs'
2075 avplay_select="rdft"
2076 avprobe_deps="avcodec avformat"
2077 avserver_deps="avformat fork !shared"
2078 avserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2079
2080 # documentation
2081 pod2man_deps="doc"
2082 texi2html_deps="doc"
2083
2084 # default parameters
2085
2086 logfile="config.log"
2087
2088 # installation paths
2089 prefix_default="/usr/local"
2090 bindir_default='${prefix}/bin'
2091 datadir_default='${prefix}/share/avconv'
2092 docdir_default='${prefix}/share/doc/libav'
2093 incdir_default='${prefix}/include'
2094 libdir_default='${prefix}/lib'
2095 mandir_default='${prefix}/share/man'
2096 shlibdir_default="$libdir_default"
2097
2098 # toolchain
2099 ar_default="ar"
2100 cc_default="gcc"
2101 host_cc_default="gcc"
2102 cp_f="cp -f"
2103 ln_s="ln -s -f"
2104 nm_default="nm -g"
2105 objformat="elf"
2106 pkg_config_default=pkg-config
2107 ranlib="ranlib"
2108 strip="strip"
2109 yasmexe="yasm"
2110
2111 nogas=":"
2112
2113 # machine
2114 arch_default=$(uname -m)
2115 cpu="generic"
2116
2117 # OS
2118 target_os_default=$(tolower $(uname -s))
2119 host_os=$target_os_default
2120
2121 # configurable options
2122 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2123
2124 enable asm
2125 enable debug
2126 enable doc
2127 enable optimizations
2128 enable safe_bitstream_reader
2129 enable static
2130 enable swscale_alpha
2131
2132 # By default, enable only those hwaccels that have no external dependencies.
2133 enable dxva2 vdpau
2134
2135 # build settings
2136 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2137 LIBPREF="lib"
2138 LIBSUF=".a"
2139 FULLNAME='$(NAME)$(BUILDSUF)'
2140 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2141 SLIBPREF="lib"
2142 SLIBSUF=".so"
2143 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2144 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2145 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2146 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2147 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2148 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2149
2150 asflags_filter=echo
2151 cflags_filter=echo
2152 ldflags_filter=echo
2153
2154 AS_C='-c'
2155 AS_O='-o $@'
2156 CC_C='-c'
2157 CC_E='-E -o $@'
2158 CC_O='-o $@'
2159 LD_O='-o $@'
2160 LD_LIB='-l%'
2161 LD_PATH='-L'
2162 HOSTCC_C='-c'
2163 HOSTCC_E='-E -o $@'
2164 HOSTCC_O='-o $@'
2165 HOSTLD_O='-o $@'
2166
2167 host_libs='-lm'
2168 host_cflags_filter=echo
2169 host_ldflags_filter=echo
2170
2171 target_path='$(CURDIR)'
2172
2173 # since the object filename is not given with the -MM flag, the compiler
2174 # is only able to print the basename, and we must add the path ourselves
2175 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2176 DEPFLAGS='-MM'
2177
2178 # find source path
2179 if test -f configure; then
2180     source_path=.
2181 else
2182     source_path=$(cd $(dirname "$0"); pwd)
2183     echo "$source_path" | grep -q '[[:blank:]]' &&
2184         die "Out of tree builds are impossible with whitespace in source path."
2185     test -e "$source_path/config.h" &&
2186         die "Out of tree builds are impossible with config.h in source dir."
2187 fi
2188
2189 for v in "$@"; do
2190     r=${v#*=}
2191     l=${v%"$r"}
2192     r=$(sh_quote "$r")
2193     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2194 done
2195
2196 find_things(){
2197     thing=$1
2198     pattern=$2
2199     file=$source_path/$3
2200     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2201 }
2202
2203 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2204 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2205 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2206 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2207 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2208 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2209 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2210 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2211 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2212 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2213 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2214
2215 ALL_COMPONENTS="
2216     $BSF_LIST
2217     $DECODER_LIST
2218     $DEMUXER_LIST
2219     $ENCODER_LIST
2220     $FILTER_LIST
2221     $HWACCEL_LIST
2222     $INDEV_LIST
2223     $MUXER_LIST
2224     $OUTDEV_LIST
2225     $PARSER_LIST
2226     $PROTOCOL_LIST
2227 "
2228
2229 for n in $COMPONENT_LIST; do
2230     v=$(toupper ${n%s})_LIST
2231     eval enable \$$v
2232     eval ${n}_if_any="\$$v"
2233 done
2234
2235 enable $ARCH_EXT_LIST
2236
2237 die_unknown(){
2238     echo "Unknown option \"$1\"."
2239     echo "See $0 --help for available options."
2240     exit 1
2241 }
2242
2243 print_3_columns() {
2244     cat | tr ' ' '\n' | sort | pr -r -3 -t
2245 }
2246
2247 show_list() {
2248     suffix=_$1
2249     shift
2250     echo $* | sed s/$suffix//g | print_3_columns
2251     exit 0
2252 }
2253
2254 rand_list(){
2255     IFS=', '
2256     set -- $*
2257     unset IFS
2258     for thing; do
2259         comp=${thing%:*}
2260         prob=${thing#$comp}
2261         prob=${prob#:}
2262         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2263         echo "prob ${prob:-0.5}"
2264         printf '%s\n' $comp
2265     done
2266 }
2267
2268 do_random(){
2269     action=$1
2270     shift
2271     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2272     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2273 }
2274
2275 for opt do
2276     optval="${opt#*=}"
2277     case "$opt" in
2278         --extra-ldflags=*)
2279             add_ldflags $optval
2280         ;;
2281         --extra-libs=*)
2282             add_extralibs $optval
2283         ;;
2284         --disable-devices)
2285             disable $INDEV_LIST $OUTDEV_LIST
2286         ;;
2287         --enable-debug=*)
2288             debuglevel="$optval"
2289         ;;
2290         --disable-programs)
2291             disable $PROGRAM_LIST
2292         ;;
2293         --disable-everything)
2294             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2295         ;;
2296         --disable-all)
2297             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2298             disable $LIBRARY_LIST $PROGRAM_LIST doc
2299         ;;
2300         --enable-random|--disable-random)
2301             action=${opt%%-random}
2302             do_random ${action#--} $COMPONENT_LIST
2303         ;;
2304         --enable-random=*|--disable-random=*)
2305             action=${opt%%-random=*}
2306             do_random ${action#--} $optval
2307         ;;
2308         --enable-*=*|--disable-*=*)
2309             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2310             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2311             eval list=\$$(toupper $thing)_LIST
2312             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2313             $action $(filter "$name" $list)
2314         ;;
2315         --enable-?*|--disable-?*)
2316             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2317             if is_in $option $COMPONENT_LIST; then
2318                 test $action = disable && action=unset
2319                 eval $action \$$(toupper ${option%s})_LIST
2320             elif is_in $option $CMDLINE_SELECT; then
2321                 $action $option
2322             else
2323                 die_unknown $opt
2324             fi
2325         ;;
2326         --list-*)
2327             NAME="${opt#--list-}"
2328             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2329             NAME=${NAME%s}
2330             eval show_list $NAME \$$(toupper $NAME)_LIST
2331         ;;
2332         --help|-h) show_help
2333         ;;
2334         *)
2335             optname="${opt%%=*}"
2336             optname="${optname#--}"
2337             optname=$(echo "$optname" | sed 's/-/_/g')
2338             if is_in $optname $CMDLINE_SET; then
2339                 eval $optname='$optval'
2340             elif is_in $optname $CMDLINE_APPEND; then
2341                 append $optname "$optval"
2342             else
2343                 die_unknown $opt
2344             fi
2345         ;;
2346     esac
2347 done
2348
2349 disabled logging && logfile=/dev/null
2350
2351 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2352 set >> $logfile
2353
2354 test -n "$cross_prefix" && enable cross_compile
2355
2356 if enabled cross_compile; then
2357     test -n "$arch" && test -n "$target_os" ||
2358         die "Must specify target arch and OS when cross-compiling"
2359 fi
2360
2361 ar_default="${cross_prefix}${ar_default}"
2362 cc_default="${cross_prefix}${cc_default}"
2363 nm_default="${cross_prefix}${nm_default}"
2364 pkg_config_default="${cross_prefix}${pkg_config_default}"
2365 ranlib="${cross_prefix}${ranlib}"
2366 strip="${cross_prefix}${strip}"
2367
2368 sysinclude_default="${sysroot}/usr/include"
2369
2370 case "$toolchain" in
2371     clang-asan)
2372         cc_default="clang"
2373         add_cflags  -fsanitize=address
2374         add_ldflags -fsanitize=address
2375     ;;
2376     clang-tsan)
2377         cc_default="clang"
2378         add_cflags  -fsanitize=thread -pie
2379         add_ldflags -fsanitize=thread -pie
2380     ;;
2381     clang-usan)
2382         cc_default="clang"
2383         add_cflags  -fsanitize=undefined
2384         add_ldflags -fsanitize=undefined
2385     ;;
2386     gcc-asan)
2387         cc_default="gcc"
2388         add_cflags  -fsanitize=address
2389         add_ldflags -fsanitize=address
2390     ;;
2391     gcc-tsan)
2392         cc_default="gcc"
2393         add_cflags  -fsanitize=thread -pie -fPIC
2394         add_ldflags -fsanitize=thread -pie -fPIC
2395     ;;
2396     gcc-usan)
2397         cc_default="gcc"
2398         add_cflags  -fsanitize=undefined
2399         add_ldflags -fsanitize=undefined
2400     ;;
2401     valgrind-massif)
2402         target_exec_default="valgrind"
2403         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2404     ;;
2405     valgrind-memcheck)
2406         target_exec_default="valgrind"
2407         target_exec_args="--track-origins=yes --leak-check=full"
2408     ;;
2409     msvc)
2410         # Check whether the current MSVC version needs the C99 converter.
2411         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2412         # support enough of C99 to build libav. Default to the new
2413         # behaviour if the regexp was unable to match anything, since this
2414         # successfully parses the version number of existing supported
2415         # versions that require the converter (MSVC 2010 and 2012).
2416         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2417         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2418             cc_default="cl"
2419         else
2420             cc_default="c99wrap cl"
2421         fi
2422         ld_default="link"
2423         nm_default="dumpbin -symbols"
2424         ar_default="lib"
2425         target_os_default="win32"
2426         # Use a relative path for TMPDIR. This makes sure all the
2427         # ffconf temp files are written with a relative path, avoiding
2428         # issues with msys/win32 path conversion for MSVC parameters
2429         # such as -Fo<file> or -out:<file>.
2430         TMPDIR=.
2431     ;;
2432     icl)
2433         cc_default="icl"
2434         ld_default="xilink"
2435         nm_default="dumpbin -symbols"
2436         ar_default="xilib"
2437         target_os_default="win32"
2438         TMPDIR=.
2439     ;;
2440     gcov)
2441         add_cflags  -fprofile-arcs -ftest-coverage
2442         add_ldflags -fprofile-arcs -ftest-coverage
2443     ;;
2444     hardened)
2445         add_cflags  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2446         add_ldflags -Wl,-z,relro -Wl,-z,now
2447     ;;
2448     ?*)
2449         die "Unknown toolchain $toolchain"
2450     ;;
2451 esac
2452
2453 set_default arch cc pkg_config sysinclude target_exec target_os
2454 enabled cross_compile || host_cc_default=$cc
2455 set_default host_cc
2456
2457 if ! $pkg_config --version >/dev/null 2>&1; then
2458     warn "$pkg_config not found, library detection may fail."
2459     pkg_config=false
2460 fi
2461
2462 exesuf() {
2463     case $1 in
2464         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2465     esac
2466 }
2467
2468 EXESUF=$(exesuf $target_os)
2469 HOSTEXESUF=$(exesuf $host_os)
2470
2471 # set temporary file name
2472 : ${TMPDIR:=$TEMPDIR}
2473 : ${TMPDIR:=$TMP}
2474 : ${TMPDIR:=/tmp}
2475
2476 if ! check_cmd mktemp -u XXXXXX; then
2477     # simple replacement for missing mktemp
2478     # NOT SAFE FOR GENERAL USE
2479     mktemp(){
2480         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2481     }
2482 fi
2483
2484 tmpfile(){
2485     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2486         (set -C; exec > $tmp) 2>/dev/null ||
2487         die "Unable to create temporary file in $TMPDIR."
2488     append TMPFILES $tmp
2489     eval $1=$tmp
2490 }
2491
2492 trap 'rm -f -- $TMPFILES' EXIT
2493
2494 tmpfile TMPASM .asm
2495 tmpfile TMPC   .c
2496 tmpfile TMPE   $EXESUF
2497 tmpfile TMPH   .h
2498 tmpfile TMPO   .o
2499 tmpfile TMPS   .S
2500 tmpfile TMPSH  .sh
2501 tmpfile TMPV   .ver
2502
2503 unset -f mktemp
2504
2505 chmod +x $TMPE
2506
2507 # make sure we can execute files in $TMPDIR
2508 cat > $TMPSH 2>> $logfile <<EOF
2509 #! /bin/sh
2510 EOF
2511 chmod +x $TMPSH >> $logfile 2>&1
2512 if ! $TMPSH >> $logfile 2>&1; then
2513     cat <<EOF
2514 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2515 variable to another directory and make sure that it is not mounted noexec.
2516 EOF
2517     die "Sanity test failed."
2518 fi
2519
2520 ccc_flags(){
2521     for flag; do
2522         case $flag in
2523             -std=c99)           echo -c99                       ;;
2524             -mcpu=*)            echo -arch ${flag#*=}           ;;
2525             -mieee)             echo -ieee                      ;;
2526             -O*|-fast)          echo $flag                      ;;
2527             -fno-math-errno)    echo -assume nomath_errno       ;;
2528             -g)                 echo -g3                        ;;
2529             -Wall)              echo -msg_enable level2         ;;
2530             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2531             -Wl,*)              echo $flag                      ;;
2532             -f*|-W*)                                            ;;
2533             *)                  echo $flag                      ;;
2534         esac
2535    done
2536 }
2537
2538 cparser_flags(){
2539     for flag; do
2540         case $flag in
2541             -Wno-switch)             echo -Wno-switch-enum ;;
2542             -Wno-format-zero-length) ;;
2543             -Wdisabled-optimization) ;;
2544             -Wno-pointer-sign)       echo -Wno-other ;;
2545             *)                       echo $flag ;;
2546         esac
2547     done
2548 }
2549
2550 msvc_common_flags(){
2551     for flag; do
2552         case $flag in
2553             # In addition to specifying certain flags under the compiler
2554             # specific filters, they must be specified here as well or else the
2555             # generic catch all at the bottom will print the original flag.
2556             -Wall)                ;;
2557             -std=c99)             ;;
2558             # Common flags
2559             -fomit-frame-pointer) ;;
2560             -g)                   echo -Z7 ;;
2561             -fno-math-errno)      ;;
2562             -fno-common)          ;;
2563             -fno-signed-zeros)    ;;
2564             -fPIC)                ;;
2565             -mthumb)              ;;
2566             -march=*)             ;;
2567             -lz)                  echo zlib.lib ;;
2568             -lavifil32)           echo vfw32.lib ;;
2569             -lavicap32)           echo vfw32.lib user32.lib ;;
2570             -l*)                  echo ${flag#-l}.lib ;;
2571             *)                    echo $flag ;;
2572         esac
2573     done
2574 }
2575
2576 msvc_flags(){
2577     msvc_common_flags "$@"
2578     for flag; do
2579         case $flag in
2580             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2581                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2582                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2583                                        -wd4273 ;;
2584         esac
2585     done
2586 }
2587
2588 icl_flags(){
2589     msvc_common_flags "$@"
2590     for flag; do
2591         case $flag in
2592             # Despite what Intel's documentation says -Wall, which is supported
2593             # on Windows, does enable remarks so disable them here.
2594             -Wall)                echo $flag -Qdiag-disable:remark ;;
2595             -std=c99)             echo -Qstd=c99 ;;
2596         esac
2597     done
2598 }
2599
2600 pgi_flags(){
2601     for flag; do
2602         case $flag in
2603             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2604             -fomit-frame-pointer) echo -Mnoframe ;;
2605             -g)                   echo -gopt ;;
2606             *)                    echo $flag ;;
2607         esac
2608     done
2609 }
2610
2611 suncc_flags(){
2612     for flag; do
2613         case $flag in
2614             -march=*|-mcpu=*)
2615                 case "${flag#*=}" in
2616                     native)                   echo -xtarget=native       ;;
2617                     v9|niagara)               echo -xarch=sparc          ;;
2618                     ultrasparc)               echo -xarch=sparcvis       ;;
2619                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2620                     i586|pentium)             echo -xchip=pentium        ;;
2621                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2622                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2623                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2624                     pentium4*)          echo -xtarget=pentium4           ;;
2625                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2626                     *-sse3)             echo -xarch=sse3                 ;;
2627                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2628                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2629                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2630                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2631                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2632                     k8|opteron|athlon64|athlon-fx)
2633                                                echo -xarch=sse2a         ;;
2634                     athlon*)                   echo -xarch=pentium_proa  ;;
2635                 esac
2636                 ;;
2637             -std=c99)             echo -xc99              ;;
2638             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2639             -fPIC)                echo -KPIC -xcode=pic32 ;;
2640             -W*,*)                echo $flag              ;;
2641             -f*-*|-W*|-mimpure-text)                      ;;
2642             -shared)              echo -G                 ;;
2643             *)                    echo $flag              ;;
2644         esac
2645     done
2646 }
2647
2648 tms470_flags(){
2649     for flag; do
2650         case $flag in
2651             -march=*|-mcpu=*)
2652                 case "${flag#*=}" in
2653                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2654                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2655                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2656                     armv6*|arm11*)          echo -mv=6   ;;
2657                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2658                                             echo -mv=5e  ;;
2659                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2660                 esac
2661                 ;;
2662             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2663             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2664             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2665             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2666             -msoft-float)   echo --float_support=vfplib       ;;
2667             -O[0-3]|-mf=*)  echo $flag                        ;;
2668             -g)             echo -g -mn                       ;;
2669             -pds=*)         echo $flag                        ;;
2670             -D*|-I*)        echo $flag                        ;;
2671             --gcc|--abi=*)  echo $flag                        ;;
2672             -me)            echo $flag                        ;;
2673         esac
2674     done
2675 }
2676
2677 probe_cc(){
2678     pfx=$1
2679     _cc=$2
2680
2681     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2682     unset _ld_o _ldflags _ld_lib _ld_path
2683     unset _depflags _DEPCMD _DEPFLAGS
2684     _flags_filter=echo
2685
2686     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2687         _type=llvm_gcc
2688         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
2689         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
2690         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2691         _cflags_speed='-O3'
2692         _cflags_size='-Os'
2693     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2694         _type=gcc
2695         gcc_version=$($_cc --version | head -n1)
2696         gcc_basever=$($_cc -dumpversion)
2697         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2698         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2699         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2700         if ! $_cc -dumpversion | grep -q '^2\.'; then
2701             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2702         fi
2703         _cflags_speed='-O3'
2704         _cflags_size='-Os'
2705     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2706         _type=icc
2707         _ident=$($_cc --version | head -n1)
2708         _depflags='-MMD'
2709         _cflags_speed='-O3'
2710         _cflags_size='-Os'
2711         _cflags_noopt='-O1'
2712     elif $_cc -v 2>&1 | grep -q xlc; then
2713         _type=xlc
2714         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2715         _cflags_speed='-O5'
2716         _cflags_size='-O5 -qcompact'
2717     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2718         _type=ccc
2719         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2720         _DEPFLAGS='-M'
2721         _cflags_speed='-fast'
2722         _cflags_size='-O1'
2723         _flags_filter=ccc_flags
2724     elif $_cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
2725         test -d "$sysroot" || die "No valid sysroot specified."
2726         _type=armcc
2727         _ident=$($_cc --vsn | head -n1)
2728         armcc_conf="$PWD/armcc.conf"
2729         $_cc --arm_linux_configure                 \
2730              --arm_linux_config_file="$armcc_conf" \
2731              --configure_sysroot="$sysroot"        \
2732              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
2733              die "Error creating armcc configuration file."
2734         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
2735         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
2736         as_default="${cross_prefix}gcc"
2737         _depflags='-MMD'
2738         _cflags_speed='-O3'
2739         _cflags_size='-Os'
2740     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
2741         _type=tms470
2742         _ident=$($_cc -version | head -n1 | tr -s ' ')
2743         _flags='--gcc --abi=eabi -me'
2744         _cc_e='-ppl -fe=$@'
2745         _cc_o='-fe=$@'
2746         _depflags='-ppa -ppd=$(@:.o=.d)'
2747         _cflags_speed='-O3 -mf=5'
2748         _cflags_size='-O3 -mf=2'
2749         _flags_filter=tms470_flags
2750     elif $_cc -v 2>&1 | grep -q clang; then
2751         _type=clang
2752         _ident=$($_cc --version | head -n1)
2753         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2754         _cflags_speed='-O3'
2755         _cflags_size='-Os'
2756     elif $_cc -V 2>&1 | grep -q Sun; then
2757         _type=suncc
2758         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
2759         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
2760         _DEPFLAGS='-xM1 -xc99'
2761         _ldflags='-std=c99'
2762         _cflags_speed='-O5'
2763         _cflags_size='-O5 -xspace'
2764         _flags_filter=suncc_flags
2765     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
2766         _type=pathscale
2767         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2768         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2769         _cflags_speed='-O2'
2770         _cflags_size='-Os'
2771         _flags_filter='filter_out -Wdisabled-optimization'
2772     elif $_cc -v 2>&1 | grep -q Open64; then
2773         _type=open64
2774         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2775         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2776         _cflags_speed='-O2'
2777         _cflags_size='-Os'
2778         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
2779     elif $_cc -V 2>&1 | grep -q Portland; then
2780         _type=pgi
2781         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
2782         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
2783         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
2784         _cflags_size="-O2 -Munroll=c:1 $opt_common"
2785         _cflags_noopt="-O1"
2786         _flags_filter=pgi_flags
2787     elif $_cc 2>&1 | grep -q Microsoft; then
2788         _type=msvc
2789         _ident=$($cc 2>&1 | head -n1)
2790         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
2791         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
2792         _cflags_speed="-O2"
2793         _cflags_size="-O1"
2794         if $_cc 2>&1 | grep -q Linker; then
2795             _ld_o='-out:$@'
2796         else
2797             _ld_o='-Fe$@'
2798         fi
2799         _cc_o='-Fo$@'
2800         _cc_e='-P -Fi$@'
2801         _flags_filter=msvc_flags
2802         _ld_lib='lib%.a'
2803         _ld_path='-libpath:'
2804         _flags='-nologo'
2805         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
2806         if [ $pfx = hostcc ]; then
2807             append _cflags -Dsnprintf=_snprintf
2808         fi
2809     elif $_cc 2>&1 | grep -q Intel; then
2810         _type=icl
2811         _ident=$($cc 2>&1 | head -n1)
2812         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
2813         # Not only is O3 broken on 13.x+ but it is slower on all previous
2814         # versions (tested) as well.
2815         _cflags_speed="-O2"
2816         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
2817         if $_cc 2>&1 | grep -q Linker; then
2818             _ld_o='-out:$@'
2819         else
2820             _ld_o='-Fe$@'
2821         fi
2822         _cc_o='-Fo$@'
2823         _cc_e='-P'
2824         _flags_filter=icl_flags
2825         _ld_lib='lib%.a'
2826         _ld_path='-libpath:'
2827         # -Qdiag-error to make icl error when seeing certain unknown arguments
2828         _flags='-nologo -Qdiag-error:4044,10157'
2829         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
2830         # with MSVC which enables it by default.
2831         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
2832         if [ $pfx = hostcc ]; then
2833             append _cflags -Dsnprintf=_snprintf
2834         fi
2835     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
2836         _type=cparser
2837         _ident=$($_cc --version | head -n1)
2838         _depflags='-MMD'
2839         _cflags_speed='-O4'
2840         _cflags_size='-O2'
2841         _flags_filter=cparser_flags
2842     fi
2843
2844     eval ${pfx}_type=\$_type
2845     eval ${pfx}_ident=\$_ident
2846 }
2847
2848 set_ccvars(){
2849     eval ${1}_C=\${_cc_c-\${${1}_C}}
2850     eval ${1}_E=\${_cc_e-\${${1}_E}}
2851     eval ${1}_O=\${_cc_o-\${${1}_O}}
2852
2853     if [ -n "$_depflags" ]; then
2854         eval ${1}_DEPFLAGS=\$_depflags
2855     else
2856         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
2857         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
2858         eval DEP${1}FLAGS=\$_flags
2859     fi
2860 }
2861
2862 probe_cc cc "$cc"
2863 cflags_filter=$_flags_filter
2864 cflags_speed=$_cflags_speed
2865 cflags_size=$_cflags_size
2866 cflags_noopt=$_cflags_noopt
2867 add_cflags $_flags $_cflags
2868 cc_ldflags=$_ldflags
2869 set_ccvars CC
2870
2871 probe_cc hostcc "$host_cc"
2872 host_cflags_filter=$_flags_filter
2873 add_host_cflags  $_flags $_cflags
2874 set_ccvars HOSTCC
2875
2876 test -n "$cc_type" && enable $cc_type ||
2877     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
2878
2879 : ${as_default:=$cc}
2880 : ${dep_cc_default:=$cc}
2881 : ${ld_default:=$cc}
2882 : ${host_ld_default:=$host_cc}
2883 set_default ar as dep_cc ld host_ld
2884
2885 probe_cc as "$as"
2886 asflags_filter=$_flags_filter
2887 add_asflags $_flags $_cflags
2888 set_ccvars AS
2889
2890 probe_cc ld "$ld"
2891 ldflags_filter=$_flags_filter
2892 add_ldflags $_flags $_ldflags
2893 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
2894 LD_O=${_ld_o-$LD_O}
2895 LD_LIB=${_ld_lib-$LD_LIB}
2896 LD_PATH=${_ld_path-$LD_PATH}
2897
2898 probe_cc hostld "$host_ld"
2899 host_ldflags_filter=$_flags_filter
2900 add_host_ldflags $_flags $_ldflags
2901 HOSTLD_O=${_ld_o-$HOSTLD_O}
2902
2903 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
2904     probe_cc depcc "$dep_cc"
2905     CCDEP=${_DEPCMD:-$DEPCMD}
2906     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
2907     DEPCCFLAGS=$_flags
2908 fi
2909
2910 if $ar 2>&1 | grep -q Microsoft; then
2911     arflags="-nologo"
2912     ar_o='-out:$@'
2913 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
2914     arflags="rq"
2915     ar_o='$@'
2916 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
2917     arflags='-Xany -r -c'
2918     ar_o='$@'
2919 else
2920     arflags="rc"
2921     ar_o='$@'
2922 fi
2923
2924 add_cflags $extra_cflags
2925 add_asflags $extra_cflags
2926
2927 if test -n "$sysroot"; then
2928     case "$cc_type" in
2929         gcc|llvm_gcc|clang)
2930             add_cppflags --sysroot="$sysroot"
2931             add_ldflags --sysroot="$sysroot"
2932         ;;
2933         tms470)
2934             add_cppflags -I"$sysinclude"
2935             add_ldflags  --sysroot="$sysroot"
2936         ;;
2937     esac
2938 fi
2939
2940 if test "$cpu" = host; then
2941     enabled cross_compile &&
2942         die "--cpu=host makes no sense when cross-compiling."
2943
2944     case "$cc_type" in
2945         gcc|llvm_gcc)
2946             check_native(){
2947                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
2948                 sed -n "/cc1.*$1=/{
2949                             s/.*$1=\\([^ ]*\\).*/\\1/
2950                             p
2951                             q
2952                         }" $TMPE
2953             }
2954             cpu=$(check_native -march || check_native -mcpu)
2955         ;;
2956     esac
2957
2958     test "${cpu:-host}" = host &&
2959         die "--cpu=host not supported with compiler $cc"
2960 fi
2961
2962 # Deal with common $arch aliases
2963 case "$arch" in
2964     aarch64|arm64)
2965         arch="aarch64"
2966     ;;
2967     arm*)
2968         arch="arm"
2969     ;;
2970     mips*|IP*)
2971         arch="mips"
2972     ;;
2973     parisc*|hppa*)
2974         arch="parisc"
2975     ;;
2976     "Power Macintosh"|ppc*|powerpc*)
2977         arch="ppc"
2978     ;;
2979     s390|s390x)
2980         arch="s390"
2981     ;;
2982     sh4|sh)
2983         arch="sh4"
2984     ;;
2985     sun4u|sparc*)
2986         arch="sparc"
2987     ;;
2988     tilegx|tile-gx)
2989         arch="tilegx"
2990     ;;
2991     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
2992         arch="x86"
2993     ;;
2994 esac
2995
2996 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
2997 enable $arch
2998
2999 # Add processor-specific flags
3000 if enabled aarch64; then
3001
3002     case $cpu in
3003         armv*)
3004             cpuflags="-march=$cpu"
3005         ;;
3006         *)
3007             cpuflags="-mcpu=$cpu"
3008         ;;
3009     esac
3010
3011 elif enabled alpha; then
3012
3013     cpuflags="-mcpu=$cpu"
3014
3015 elif enabled arm; then
3016
3017     check_arm_arch() {
3018         check_cpp_condition stddef.h \
3019             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3020             $cpuflags
3021     }
3022
3023     probe_arm_arch() {
3024         if   check_arm_arch 4;        then echo armv4;
3025         elif check_arm_arch 4T;       then echo armv4t;
3026         elif check_arm_arch 5;        then echo armv5;
3027         elif check_arm_arch 5E;       then echo armv5e;
3028         elif check_arm_arch 5T;       then echo armv5t;
3029         elif check_arm_arch 5TE;      then echo armv5te;
3030         elif check_arm_arch 5TEJ;     then echo armv5te;
3031         elif check_arm_arch 6;        then echo armv6;
3032         elif check_arm_arch 6J;       then echo armv6j;
3033         elif check_arm_arch 6K;       then echo armv6k;
3034         elif check_arm_arch 6Z;       then echo armv6z;
3035         elif check_arm_arch 6ZK;      then echo armv6zk;
3036         elif check_arm_arch 6T2;      then echo armv6t2;
3037         elif check_arm_arch 7;        then echo armv7;
3038         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3039         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3040         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3041         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3042         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3043         fi
3044     }
3045
3046     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3047
3048     case $cpu in
3049         armv*)
3050             cpuflags="-march=$cpu"
3051             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3052         ;;
3053         *)
3054             cpuflags="-mcpu=$cpu"
3055             case $cpu in
3056                 cortex-a*)                               subarch=armv7a  ;;
3057                 cortex-r*)                               subarch=armv7r  ;;
3058                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3059                 arm11*)                                  subarch=armv6   ;;
3060                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3061                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3062                 *)                             subarch=$(probe_arm_arch) ;;
3063             esac
3064         ;;
3065     esac
3066
3067     case "$subarch" in
3068         armv5t*)    enable fast_clz                ;;
3069         armv[6-8]*) enable fast_clz fast_unaligned ;;
3070     esac
3071
3072 elif enabled avr32; then
3073
3074     case $cpu in
3075         ap7[02]0[0-2])
3076             subarch="avr32_ap"
3077             cpuflags="-mpart=$cpu"
3078         ;;
3079         ap)
3080             subarch="avr32_ap"
3081             cpuflags="-march=$cpu"
3082         ;;
3083         uc3[ab]*)
3084             subarch="avr32_uc"
3085             cpuflags="-mcpu=$cpu"
3086         ;;
3087         uc)
3088             subarch="avr32_uc"
3089             cpuflags="-march=$cpu"
3090         ;;
3091     esac
3092
3093 elif enabled bfin; then
3094
3095     cpuflags="-mcpu=$cpu"
3096
3097 elif enabled mips; then
3098
3099     cpuflags="-march=$cpu"
3100
3101 elif enabled ppc; then
3102
3103     case $(tolower $cpu) in
3104         601|ppc601|powerpc601)
3105             cpuflags="-mcpu=601"
3106             disable altivec
3107         ;;
3108         603*|ppc603*|powerpc603*)
3109             cpuflags="-mcpu=603"
3110             disable altivec
3111         ;;
3112         604*|ppc604*|powerpc604*)
3113             cpuflags="-mcpu=604"
3114             disable altivec
3115         ;;
3116         g3|75*|ppc75*|powerpc75*)
3117             cpuflags="-mcpu=750"
3118             disable altivec
3119         ;;
3120         g4|745*|ppc745*|powerpc745*)
3121             cpuflags="-mcpu=7450"
3122         ;;
3123         74*|ppc74*|powerpc74*)
3124             cpuflags="-mcpu=7400"
3125         ;;
3126         g5|970|ppc970|powerpc970)
3127             cpuflags="-mcpu=970"
3128         ;;
3129         power[3-7]*)
3130             cpuflags="-mcpu=$cpu"
3131         ;;
3132         cell)
3133             cpuflags="-mcpu=cell"
3134             enable ldbrx
3135         ;;
3136         e500mc)
3137             cpuflags="-mcpu=e500mc"
3138             disable altivec
3139         ;;
3140         e500v2)
3141             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3142             disable altivec
3143         ;;
3144         e500)
3145             cpuflags="-mcpu=8540 -mhard-float"
3146             disable altivec
3147         ;;
3148     esac
3149
3150 elif enabled sparc; then
3151
3152     case $cpu in
3153         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3154             cpuflags="-mcpu=$cpu"
3155             disable vis
3156         ;;
3157         ultrasparc*|niagara[234])
3158             cpuflags="-mcpu=$cpu"
3159         ;;
3160     esac
3161
3162 elif enabled x86; then
3163
3164     case $cpu in
3165         i[345]86|pentium)
3166             cpuflags="-march=$cpu"
3167             disable mmx
3168         ;;
3169         # targets that do NOT support nopl and conditional mov (cmov)
3170         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3171             cpuflags="-march=$cpu"
3172             disable i686
3173         ;;
3174         # targets that do support nopl and conditional mov (cmov)
3175         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3176             cpuflags="-march=$cpu"
3177             enable i686
3178             enable fast_cmov
3179         ;;
3180         # targets that do support conditional mov but on which it's slow
3181         pentium4|pentium4m|prescott|nocona)
3182             cpuflags="-march=$cpu"
3183             enable i686
3184             disable fast_cmov
3185         ;;
3186     esac
3187
3188 fi
3189
3190 if [ "$cpu" != generic ]; then
3191     add_cflags  $cpuflags
3192     add_asflags $cpuflags
3193 fi
3194
3195 # compiler sanity check
3196 check_exec <<EOF
3197 int main(void){ return 0; }
3198 EOF
3199 if test "$?" != 0; then
3200     echo "$cc is unable to create an executable file."
3201     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3202         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3203         echo "Only do this if you know what cross compiling means."
3204     fi
3205     die "C compiler test failed."
3206 fi
3207
3208 add_cppflags -D_ISOC99_SOURCE
3209 check_cflags -std=c99
3210 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3211 #include <stdlib.h>
3212 EOF
3213 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3214 #include <stdlib.h>
3215 EOF
3216
3217 add_host_cppflags -D_ISOC99_SOURCE
3218 check_host_cflags -std=c99
3219 check_host_cflags -Wall
3220 check_host_cflags -O3
3221
3222 check_64bit(){
3223     arch32=$1
3224     arch64=$2
3225     expr=$3
3226     check_code cc "" "int test[2*($expr) - 1]" &&
3227         subarch=$arch64 || subarch=$arch32
3228 }
3229
3230 case "$arch" in
3231     aarch64|alpha|ia64)
3232         spic=$shared
3233     ;;
3234     mips)
3235         check_64bit mips mips64 '_MIPS_SIM > 1'
3236         spic=$shared
3237     ;;
3238     parisc)
3239         check_64bit parisc parisc64 'sizeof(void *) > 4'
3240         spic=$shared
3241     ;;
3242     ppc)
3243         check_64bit ppc ppc64 'sizeof(void *) > 4'
3244         spic=$shared
3245     ;;
3246     s390)
3247         check_64bit s390 s390x 'sizeof(void *) > 4'
3248         spic=$shared
3249     ;;
3250     sparc)
3251         check_64bit sparc sparc64 'sizeof(void *) > 4'
3252         spic=$shared
3253     ;;
3254     x86)
3255         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3256         if test "$subarch" = "x86_64"; then
3257             spic=$shared
3258         fi
3259     ;;
3260 esac
3261
3262 enable $subarch
3263 enabled spic && enable_weak pic
3264
3265 # OS specific
3266 case $target_os in
3267     aix)
3268         SHFLAGS=-shared
3269         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3270         enabled shared && add_ldflags -Wl,-brtl
3271         ;;
3272     haiku)
3273         prefix_default="/boot/common"
3274         network_extralibs="-lnetwork"
3275         host_libs=
3276         ;;
3277     sunos)
3278         SHFLAGS='-shared -Wl,-h,$$(@F)'
3279         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3280         network_extralibs="-lsocket -lnsl"
3281         # When using suncc to build, the Solaris linker will mark
3282         # an executable with each instruction set encountered by
3283         # the Solaris assembler.  As our libraries contain their own
3284         # guards for processor-specific code, instead suppress
3285         # generation of the HWCAPS ELF section on Solaris x86 only.
3286         enabled_all suncc x86 &&
3287             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3288             add_ldflags -Wl,-M,mapfile
3289         nm_default='nm -P -g'
3290         ;;
3291     netbsd)
3292         disable symver
3293         oss_indev_extralibs="-lossaudio"
3294         oss_outdev_extralibs="-lossaudio"
3295         ;;
3296     openbsd|bitrig)
3297         disable symver
3298         SHFLAGS='-shared'
3299         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3300         SLIB_INSTALL_LINKS=
3301         oss_indev_extralibs="-lossaudio"
3302         oss_outdev_extralibs="-lossaudio"
3303         ;;
3304     dragonfly)
3305         disable symver
3306         ;;
3307     freebsd)
3308         ;;
3309     bsd/os)
3310         add_extralibs -lpoll -lgnugetopt
3311         ;;
3312     darwin)
3313         gas="gas-preprocessor.pl $cc"
3314         enabled ppc && add_asflags -force_cpusubtype_ALL
3315         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3316         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3317         add_ldflags -Wl,-dynamic,-search_paths_first
3318         SLIBSUF=".dylib"
3319         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3320         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3321         objformat="macho"
3322         enabled x86_64 && objformat="macho64"
3323         enabled_any pic shared ||
3324             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3325         ;;
3326     mingw32*)
3327         if test $target_os = "mingw32ce"; then
3328             disable network
3329         else
3330             target_os=mingw32
3331         fi
3332         LIBTARGET=i386
3333         if enabled x86_64; then
3334             LIBTARGET="i386:x86-64"
3335         elif enabled arm; then
3336             LIBTARGET=arm-wince
3337         fi
3338         check_ldflags -Wl,--nxcompat
3339         check_ldflags -Wl,--dynamicbase
3340         shlibdir_default="$bindir_default"
3341         SLIBPREF=""
3342         SLIBSUF=".dll"
3343         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3344         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3345         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3346         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3347         SLIB_INSTALL_LINKS=
3348         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3349         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3350         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3351         objformat="win32"
3352         dlltool="${cross_prefix}dlltool"
3353         ranlib=:
3354         enable dos_paths
3355         ;;
3356     win32|win64)
3357         disable symver
3358         if enabled shared; then
3359             # Link to the import library instead of the normal static library
3360             # for shared libs.
3361             LD_LIB='%.lib'
3362             # Cannot build both shared and static libs with MSVC or icl.
3363             disable static
3364         fi
3365         shlibdir_default="$bindir_default"
3366         SLIBPREF=""
3367         SLIBSUF=".dll"
3368         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3369         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3370         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3371         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3372         SLIB_INSTALL_LINKS=
3373         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3374         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3375         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3376         objformat="win32"
3377         ranlib=:
3378         enable dos_paths
3379         ;;
3380     cygwin*)
3381         target_os=cygwin
3382         shlibdir_default="$bindir_default"
3383         SLIBPREF="cyg"
3384         SLIBSUF=".dll"
3385         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3386         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3387         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3388         SLIB_INSTALL_LINKS=
3389         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3390         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3391         objformat="win32"
3392         enable dos_paths
3393         ;;
3394     *-dos|freedos|opendos)
3395         network_extralibs="-lsocket"
3396         objformat="coff"
3397         enable dos_paths
3398         add_cppflags -U__STRICT_ANSI__
3399         ;;
3400     linux)
3401         enable dv1394
3402         ;;
3403     irix*)
3404         target_os=irix
3405         ranlib="echo ignoring ranlib"
3406         ;;
3407     os/2*)
3408         ln_s="cp -f"
3409         objformat="aout"
3410         add_cppflags -D_GNU_SOURCE
3411         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3412         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3413         LIBSUF="_s.a"
3414         SLIBPREF=""
3415         SLIBSUF=".dll"
3416         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3417         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3418         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3419             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3420             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3421             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3422             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3423             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3424         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3425             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3426         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3427         enable dos_paths
3428         ;;
3429     gnu/kfreebsd)
3430         add_cppflags -D_BSD_SOURCE
3431         ;;
3432     gnu)
3433         ;;
3434     qnx)
3435         add_cppflags -D_QNX_SOURCE
3436         network_extralibs="-lsocket"
3437         ;;
3438     symbian)
3439         SLIBSUF=".dll"
3440         enable dos_paths
3441         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3442         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3443         add_ldflags -Wl,--target1-abs,--no-undefined \
3444                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3445                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3446         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3447                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3448                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3449         ;;
3450     osf1)
3451         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3452         ;;
3453     minix)
3454         ;;
3455     plan9)
3456         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3457                      -D_REENTRANT_SOURCE        \
3458                      -D_RESEARCH_SOURCE         \
3459                      -DFD_SETSIZE=96            \
3460                      -DHAVE_SOCK_OPTS
3461         add_compat strtod.o strtod=avpriv_strtod
3462         network_extralibs='-lbsd'
3463         exeobjs=compat/plan9/main.o
3464         disable avserver
3465         cp_f='cp'
3466         ;;
3467     none)
3468         ;;
3469     *)
3470         die "Unknown OS '$target_os'."
3471         ;;
3472 esac
3473
3474 # determine libc flavour
3475
3476 probe_libc(){
3477     pfx=$1
3478     pfx_no_=${pfx%_}
3479     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3480     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3481         eval ${pfx}libc_type=uclibc
3482         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3483     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3484         eval ${pfx}libc_type=glibc
3485         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3486     # MinGW headers can be installed on Cygwin, so check for newlib first.
3487     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3488         eval ${pfx}libc_type=newlib
3489         add_${pfx}cppflags -U__STRICT_ANSI__
3490     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3491     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3492         eval ${pfx}libc_type=mingw64
3493         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3494         eval test \$${pfx_no_}cc_type = "gcc" &&
3495             add_${pfx}cppflags -D__printf__=__gnu_printf__
3496     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3497          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3498         eval ${pfx}libc_type=mingw32
3499         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3500             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3501             die "ERROR: MinGW32 runtime version must be >= 3.15."
3502         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3503         eval test \$${pfx_no_}cc_type = "gcc" &&
3504             add_${pfx}cppflags -D__printf__=__gnu_printf__
3505     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3506         eval ${pfx}libc_type=msvcrt
3507         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3508         # 0x601 by default unless something else is set by the user.
3509         # This can easily lead to us detecting functions only present
3510         # in such new versions and producing binaries requiring windows 7.0.
3511         # Therefore explicitly set the default to XP unless the user has
3512         # set something else on the command line.
3513         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3514             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
3515     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3516         eval ${pfx}libc_type=klibc
3517     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3518         eval ${pfx}libc_type=bionic
3519     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3520         eval ${pfx}libc_type=solaris
3521         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3522     fi
3523 }
3524
3525 probe_libc
3526 test -n "$libc_type" && enable libc_$libc_type
3527 probe_libc host_
3528 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3529
3530 case $libc_type in
3531     bionic)
3532         add_compat strtod.o strtod=avpriv_strtod
3533         ;;
3534     msvcrt)
3535         add_compat strtod.o strtod=avpriv_strtod
3536         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3537                                      _snprintf=avpriv_snprintf  \
3538                                      vsnprintf=avpriv_vsnprintf
3539         ;;
3540 esac
3541
3542 # hacks for compiler/libc/os combinations
3543
3544 if enabled_all tms470 libc_glibc; then
3545     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3546     add_cppflags -D__USER_LABEL_PREFIX__=
3547     add_cppflags -D__builtin_memset=memset
3548     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3549     add_cflags   -pds=48    # incompatible redefinition of macro
3550 fi
3551
3552 if enabled_all ccc libc_glibc; then
3553     add_ldflags -Wl,-z,now  # calls to libots crash without this
3554 fi
3555
3556 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3557     add_cppflags '-I\$(SRC_PATH)/compat/float'
3558
3559 esc(){
3560     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3561 }
3562
3563 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3564
3565 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3566
3567 set_default $PATHS_LIST
3568 set_default nm
3569
3570 # we need to build at least one lib type
3571 if ! enabled_any static shared; then
3572     cat <<EOF
3573 At least one library type must be built.
3574 Specify --enable-static to build the static libraries or --enable-shared to
3575 build the shared libraries as well. To only build the shared libraries specify
3576 --disable-static in addition to --enable-shared.
3577 EOF
3578     exit 1;
3579 fi
3580
3581 die_license_disabled() {
3582     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3583 }
3584
3585 die_license_disabled gpl libcdio
3586 die_license_disabled gpl libx264
3587 die_license_disabled gpl libx265
3588 die_license_disabled gpl libxavs
3589 die_license_disabled gpl libxvid
3590 die_license_disabled gpl x11grab
3591
3592 die_license_disabled nonfree libfaac
3593 die_license_disabled nonfree libfdk_aac
3594 die_license_disabled nonfree openssl
3595
3596 die_license_disabled version3 libopencore_amrnb
3597 die_license_disabled version3 libopencore_amrwb
3598 die_license_disabled version3 libvo_aacenc
3599 die_license_disabled version3 libvo_amrwbenc
3600
3601 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3602
3603 disabled optimizations || check_cflags -fomit-frame-pointer
3604
3605 enable_weak_pic() {
3606     disabled pic && return
3607     enable pic
3608     add_cppflags -DPIC
3609     case "$target_os" in
3610     mingw*|cygwin*)
3611         ;;
3612     *)
3613         add_cflags -fPIC
3614         ;;
3615     esac
3616     add_asflags  -fPIC
3617 }
3618
3619 enabled pic && enable_weak_pic
3620
3621 check_cc <<EOF || die "Symbol mangling check failed."
3622 int ff_extern;
3623 EOF
3624 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3625 extern_prefix=${sym%%ff_extern*}
3626
3627 check_cc <<EOF && enable_weak inline_asm
3628 void foo(void) { __asm__ volatile ("" ::); }
3629 EOF
3630
3631 _restrict=
3632 for restrict_keyword in restrict __restrict__ __restrict; do
3633     check_cc <<EOF && _restrict=$restrict_keyword && break
3634 void foo(char * $restrict_keyword p);
3635 EOF
3636 done
3637
3638 check_cc <<EOF && enable pragma_deprecated
3639 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3640 EOF
3641
3642 check_cc <<EOF && enable attribute_packed
3643 struct { int x; } __attribute__((packed)) x;
3644 EOF
3645
3646 check_cc <<EOF && enable attribute_may_alias
3647 union { int x; } __attribute__((may_alias)) x;
3648 EOF
3649
3650 check_cc <<EOF || die "endian test failed"
3651 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3652 EOF
3653 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3654
3655 check_inline_asm inline_asm_labels '"1:\n"'
3656
3657 if enabled aarch64; then
3658     # internal assembler in clang 3.3 does not support this instruction
3659     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
3660     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
3661
3662     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
3663
3664 elif enabled alpha; then
3665
3666     check_cflags -mieee
3667
3668 elif enabled arm; then
3669
3670     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
3671     enabled thumb && check_cflags -mthumb || check_cflags -marm
3672     nogas=die
3673
3674     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
3675         enable vfp_args
3676     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
3677         case "${cross_prefix:-$cc}" in
3678             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
3679             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
3680 __asm__ (".eabi_attribute 28, 1");
3681 int main(void) { return 0; }
3682 EOF
3683         esac
3684         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
3685     fi
3686
3687     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
3688     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
3689     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
3690     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
3691     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
3692     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
3693
3694     [ $target_os = linux ] ||
3695         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
3696             $ARCH_EXT_LIST_ARM
3697
3698     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
3699
3700     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
3701
3702 elif enabled mips; then
3703
3704     check_inline_asm loongson '"dmult.g $1, $2, $3"'
3705
3706 elif enabled parisc; then
3707
3708     if enabled gcc; then
3709         case $($cc -dumpversion) in
3710             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
3711         esac
3712     fi
3713
3714 elif enabled ppc; then
3715
3716     enable local_aligned_8 local_aligned_16
3717
3718     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
3719     check_inline_asm ibm_asm   '"add 0, 0, 0"'
3720     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
3721     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
3722
3723     # AltiVec flags: The FSF version of GCC differs from the Apple version
3724     if enabled altivec; then
3725         nogas=warn
3726         check_cflags -maltivec -mabi=altivec &&
3727         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
3728         check_cflags -faltivec
3729
3730         # check if our compiler supports Motorola AltiVec C API
3731         check_cc <<EOF || disable altivec
3732 $inc_altivec_h
3733 int main(void) {
3734     vector signed int v1 = (vector signed int) { 0 };
3735     vector signed int v2 = (vector signed int) { 1 };
3736     v1 = vec_add(v1, v2);
3737     return 0;
3738 }
3739 EOF
3740
3741         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
3742     fi
3743
3744 elif enabled sparc; then
3745
3746     enabled vis && check_inline_asm vis '"pdist %f0, %f0, %f0"'
3747
3748 elif enabled x86; then
3749
3750     check_builtin rdtsc    intrin.h   "__rdtsc()"
3751     check_builtin mm_empty mmintrin.h "_mm_empty()"
3752
3753     enable local_aligned_8 local_aligned_16
3754
3755     # check whether EBP is available on x86
3756     # As 'i' is stored on the stack, this program will crash
3757     # if the base pointer is used to access it because the
3758     # base pointer is cleared in the inline assembly code.
3759     check_exec_crash <<EOF && enable ebp_available
3760 volatile int i=0;
3761 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
3762 return i;
3763 EOF
3764
3765     # check whether EBX is available on x86
3766     check_inline_asm ebx_available '""::"b"(0)' &&
3767         check_inline_asm ebx_available '"":::"%ebx"'
3768
3769     # check whether xmm clobbers are supported
3770     check_inline_asm xmm_clobbers '"":::"%xmm0"'
3771
3772     # check whether binutils is new enough to compile SSSE3/MMXEXT
3773     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
3774     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
3775
3776     if ! disabled_any asm mmx yasm; then
3777         if check_cmd $yasmexe --version; then
3778             enabled x86_64 && yasm_extra="-m amd64"
3779             yasm_debug="-g dwarf2"
3780         elif check_cmd nasm -v; then
3781             yasmexe=nasm
3782             yasm_debug="-g -F dwarf"
3783             enabled x86_64 && test "$objformat" = elf && objformat=elf64
3784         fi
3785
3786         YASMFLAGS="-f $objformat $yasm_extra"
3787         enabled pic               && append YASMFLAGS "-DPIC"
3788         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
3789         case "$objformat" in
3790             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
3791         esac
3792
3793         check_yasm "movbe ecx, [5]" && enable yasm ||
3794             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
3795         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
3796         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
3797         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
3798         check_yasm "CPU amdnop" || disable cpunop
3799     fi
3800
3801     case "$cpu" in
3802         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
3803             disable fast_clz
3804         ;;
3805     esac
3806
3807 fi
3808
3809 if enabled asm; then
3810     as=${gas:=$as}
3811     check_as <<EOF && enable gnu_as || \
3812         $nogas "GNU assembler not found, install gas-preprocessor"
3813 .macro m n
3814 \n: .int 0
3815 .endm
3816 m x
3817 EOF
3818 fi
3819
3820 check_ldflags -Wl,--as-needed
3821
3822 if check_func dlopen; then
3823     ldl=
3824 elif check_func dlopen -ldl; then
3825     ldl=-ldl
3826 fi
3827
3828 if ! disabled network; then
3829     check_type "sys/types.h sys/socket.h" socklen_t
3830     check_type netdb.h "struct addrinfo"
3831     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
3832     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
3833     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
3834     check_type netinet/in.h "struct sockaddr_in6"
3835     check_type poll.h "struct pollfd"
3836     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
3837     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
3838     check_type netinet/sctp.h "struct sctp_event_subscribe"
3839     check_func getaddrinfo $network_extralibs
3840     check_func getservbyport $network_extralibs
3841     check_func inet_aton $network_extralibs
3842     # Prefer arpa/inet.h over winsock2
3843     if check_header arpa/inet.h ; then
3844         check_func closesocket
3845     elif check_header winsock2.h ; then
3846         check_func_headers winsock2.h closesocket -lws2 &&
3847             network_extralibs="-lws2" ||
3848         { check_func_headers winsock2.h closesocket -lws2_32 &&
3849             network_extralibs="-lws2_32"; } || disable winsock2_h network
3850         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
3851         check_type ws2tcpip.h socklen_t
3852         check_type ws2tcpip.h "struct addrinfo"
3853         check_type ws2tcpip.h "struct group_source_req"
3854         check_type ws2tcpip.h "struct ip_mreq_source"
3855         check_type ws2tcpip.h "struct ipv6_mreq"
3856         check_type winsock2.h "struct pollfd"
3857         check_type ws2tcpip.h "struct sockaddr_in6"
3858         check_type ws2tcpip.h "struct sockaddr_storage"
3859         check_struct winsock2.h "struct sockaddr" sa_len
3860     else
3861         disable network
3862     fi
3863 fi
3864
3865 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
3866 check_func nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
3867
3868 check_func  fcntl
3869 check_func  fork
3870 check_func_headers stdlib.h getenv
3871 check_func  gethrtime
3872 check_func  getopt
3873 check_func  getrusage
3874 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
3875 check_func  gettimeofday
3876 check_func  isatty
3877 check_func  localtime_r
3878 check_func  mach_absolute_time
3879 check_func  ${malloc_prefix}memalign            && enable memalign
3880 check_func  mkstemp
3881 check_func  mmap
3882 check_func  mprotect
3883 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
3884 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
3885 check_func  setrlimit
3886 check_func  strerror_r
3887 check_func  strptime
3888 check_func  sched_getaffinity
3889 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
3890 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
3891 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
3892 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
3893 check_func  sysconf
3894 check_func  sysctl
3895 check_func  usleep
3896 check_func_headers io.h setmode
3897 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
3898 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
3899 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
3900 check_func_headers windows.h GetProcessAffinityMask
3901 check_func_headers windows.h GetProcessTimes
3902 check_func_headers windows.h GetSystemTimeAsFileTime
3903 check_func_headers windows.h MapViewOfFile
3904 check_func_headers windows.h SetConsoleTextAttribute
3905 check_func_headers windows.h Sleep
3906 check_func_headers windows.h VirtualAlloc
3907
3908 check_header direct.h
3909 check_header dlfcn.h
3910 check_header dxva.h
3911 check_header dxva2api.h
3912 check_header io.h
3913 check_header mach/mach_time.h
3914 check_header malloc.h
3915 check_header poll.h
3916 check_header sys/mman.h
3917 check_header sys/param.h
3918 check_header sys/resource.h
3919 check_header sys/select.h
3920 check_header sys/time.h
3921 check_header sys/un.h
3922 check_header unistd.h
3923 check_header vdpau/vdpau.h
3924 check_header vdpau/vdpau_x11.h
3925 check_header VideoDecodeAcceleration/VDADecoder.h
3926 check_header windows.h
3927 check_header X11/extensions/XvMClib.h
3928
3929 if ! disabled w32threads && ! enabled pthreads; then
3930     check_func_headers "windows.h process.h" _beginthreadex &&
3931         enable w32threads || disable w32threads
3932 fi
3933
3934 # check for some common methods of building with pthread support
3935 # do this before the optional library checks as some of them require pthreads
3936 if ! disabled pthreads && ! enabled w32threads; then
3937     enable pthreads
3938     if check_func pthread_join -pthread; then
3939         add_cflags -pthread
3940         add_extralibs -pthread
3941     elif check_func pthread_join -pthreads; then
3942         add_cflags -pthreads
3943         add_extralibs -pthreads
3944     elif check_func pthread_join -lpthreadGC2; then
3945         add_extralibs -lpthreadGC2
3946     elif check_lib pthread.h pthread_join -lpthread; then
3947         :
3948     elif ! check_func pthread_join; then
3949         disable pthreads
3950     fi
3951 fi
3952
3953 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
3954 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
3955
3956 check_lib math.h sin -lm && LIBM="-lm"
3957 enabled vaapi && require vaapi va/va.h vaInitialize -lva
3958
3959 atan2f_args=2
3960 ldexpf_args=2
3961 powf_args=2
3962
3963 for func in $MATH_FUNCS; do
3964     eval check_mathfunc $func \${${func}_args:-1}
3965 done
3966
3967 # these are off by default, so fail if requested and not available
3968 enabled avisynth          && { { check_header "avisynth/avisynth_c.h" && check_lib2 "windows.h" LoadLibrary; } ||
3969                                { check_header "avxsynth/avxsynth_c.h" && check_lib2 "dlfcn.h" dlopen -ldl; } ||
3970                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
3971 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
3972 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
3973 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
3974 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
3975 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
3976 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
3977                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
3978                                done || die "ERROR: libgsm not found"; }
3979 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
3980 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
3981 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
3982 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
3983 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
3984 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg; } ||
3985                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version; } }
3986 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
3987 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
3988 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
3989 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
3990 enabled libspeex          && require libspeex speex/speex.h speex_decoder_init -lspeex
3991 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
3992 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
3993 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
3994 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
3995 enabled libvpx            && {
3996     enabled libvpx_vp8_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
3997                                     die "ERROR: libvpx decoder version must be >=0.9.1"; }
3998     enabled libvpx_vp8_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_enc_init_ver VPX_CQ" -lvpx ||
3999                                     die "ERROR: libvpx encoder version must be >=0.9.6"; }
4000     enabled libvpx_vp9_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx" -lvpx || disable libvpx_vp9_decoder; }
4001     enabled libvpx_vp9_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_vp9_cx" -lvpx || disable libvpx_vp9_encoder; } }
4002 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4003 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4004 enabled libx264           && require libx264 x264.h x264_encoder_encode -lx264 &&
4005                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4006                                die "ERROR: libx264 version must be >= 0.118."; }
4007 enabled libx265           && require_pkg_config x265 x265.h x265_encoder_encode &&
4008                              { check_cpp_condition x265.h "X265_BUILD >= 9" ||
4009                                die "ERROR: libx265 version must be >= 9."; }
4010 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4011 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4012 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4013                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4014                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4015                                die "ERROR: openssl not found"; }
4016
4017 if enabled gnutls; then
4018     { check_lib nettle/bignum.h nettle_mpz_get_str_256 -lnettle -lhogweed -lgmp && enable nettle; } ||
4019     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }