libavutil: x86: Add AVX2 capable CPU detection.
[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-libx264         enable H.264 encoding via x264 [no]
206   --enable-libxavs         enable AVS encoding via xavs [no]
207   --enable-libxvid         enable Xvid encoding via xvidcore,
208                            native MPEG-4/Xvid encoder exists [no]
209   --enable-openssl         enable openssl [no]
210   --enable-x11grab         enable X11 grabbing [no]
211   --enable-zlib            enable zlib [autodetect]
212
213 Advanced options (experts only):
214   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
215   --enable-cross-compile   assume a cross-compiler is used
216   --sysroot=PATH           root of cross-build tree
217   --sysinclude=PATH        location of cross-build system headers
218   --target-os=OS           compiler targets OS [$target_os]
219   --target-exec=CMD        command to run executables on target
220   --target-path=DIR        path to view of build directory on target
221   --target-samples=DIR     path to samples directory on target
222   --toolchain=NAME         set tool defaults according to NAME
223   --nm=NM                  use nm tool
224   --ar=AR                  use archive tool AR [$ar_default]
225   --as=AS                  use assembler AS [$as_default]
226   --cc=CC                  use C compiler CC [$cc_default]
227   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
228   --ld=LD                  use linker LD
229   --host-cc=HOSTCC         use host C compiler HOSTCC
230   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
231   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
232   --host-ld=HOSTLD         use host linker HOSTLD
233   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
234   --host-libs=HLIBS        use libs HLIBS when linking for host
235   --host-os=OS             compiler host OS [$target_os]
236   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
237   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
238   --extra-libs=ELIBS       add ELIBS [$ELIBS]
239   --extra-version=STRING   version string suffix []
240   --optflags=OPTFLAGS      override optimization-related compiler flags
241   --build-suffix=SUFFIX    library name suffix []
242   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
243   --arch=ARCH              select architecture [$arch]
244   --cpu=CPU                select the minimum required CPU (affects
245                            instruction selection, may crash on older CPUs)
246   --enable-pic             build position-independent code
247   --enable-sram            allow use of on-chip SRAM
248   --enable-thumb           compile for Thumb instruction set
249   --disable-symver         disable symbol versioning
250   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
251   --disable-safe-bitstream-reader
252                            disable buffer boundary checking in bitreaders
253                            (faster, but may crash)
254   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
255   --enable-lto             use link-time optimization
256
257 Optimization options (experts only):
258   --disable-asm            disable all assembler optimizations
259   --disable-altivec        disable AltiVec optimizations
260   --disable-amd3dnow       disable 3DNow! optimizations
261   --disable-amd3dnowext    disable 3DNow! extended optimizations
262   --disable-mmx            disable MMX optimizations
263   --disable-mmxext         disable MMXEXT optimizations
264   --disable-sse            disable SSE optimizations
265   --disable-sse2           disable SSE2 optimizations
266   --disable-sse3           disable SSE3 optimizations
267   --disable-ssse3          disable SSSE3 optimizations
268   --disable-sse4           disable SSE4 optimizations
269   --disable-sse42          disable SSE4.2 optimizations
270   --disable-avx            disable AVX optimizations
271   --disable-fma4           disable FMA4 optimizations
272   --disable-avx2           disable AVX2 optimizations
273   --disable-armv5te        disable armv5te optimizations
274   --disable-armv6          disable armv6 optimizations
275   --disable-armv6t2        disable armv6t2 optimizations
276   --disable-vfp            disable VFP optimizations
277   --disable-neon           disable NEON optimizations
278   --disable-vis            disable VIS optimizations
279   --disable-inline-asm     disable use of inline assembler
280   --disable-yasm           disable use of yasm assembler
281
282 Developer options (useful when working on Libav itself):
283   --disable-debug          disable debugging symbols
284   --enable-debug=LEVEL     set the debug level [$debuglevel]
285   --disable-optimizations  disable compiler optimizations
286   --enable-extra-warnings  enable more compiler warnings
287   --samples=PATH           location of test samples for FATE, if not set use
288                            \$LIBAV_SAMPLES at make invocation time.
289   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
290                            should be used only for debugging purposes)
291   --enable-random          randomly enable/disable components
292   --disable-random
293   --enable-random=LIST     randomly enable/disable specific components or
294   --disable-random=LIST    component groups. LIST is a comma-separated list
295                            of NAME[:PROB] entries where NAME is a component
296                            (group) and PROB the probability associated with
297                            NAME (default 0.5).
298   --random-seed=VALUE      seed value for --enable/disable-random
299
300 NOTE: Object files are built at the place where configure is launched.
301 EOF
302   exit 0
303 }
304
305 quotes='""'
306
307 log(){
308     echo "$@" >> $logfile
309 }
310
311 log_file(){
312     log BEGIN $1
313     pr -n -t $1 >> $logfile
314     log END $1
315 }
316
317 echolog(){
318     log "$@"
319     echo "$@"
320 }
321
322 warn(){
323     log "WARNING: $*"
324     WARNINGS="${WARNINGS}WARNING: $*\n"
325 }
326
327 die(){
328     echolog "$@"
329     cat <<EOF
330
331 If you think configure made a mistake, make sure you are using the latest
332 version from Git.  If the latest version fails, report the problem to the
333 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
334 EOF
335     if disabled logging; then
336         cat <<EOF
337 Rerun configure with logging enabled (do not use --disable-logging), and
338 include the log this produces with your report.
339 EOF
340     else
341         cat <<EOF
342 Include the log file "$logfile" produced by configure as this will help
343 solving the problem.
344 EOF
345     fi
346     exit 1
347 }
348
349 # Avoid locale weirdness, besides we really just want to translate ASCII.
350 toupper(){
351     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
352 }
353
354 tolower(){
355     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
356 }
357
358 c_escape(){
359     echo "$*" | sed 's/["\\]/\\\0/g'
360 }
361
362 sh_quote(){
363     v=$(echo "$1" | sed "s/'/'\\\\''/g")
364     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
365     echo "$v"
366 }
367
368 cleanws(){
369     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
370 }
371
372 filter(){
373     pat=$1
374     shift
375     for v; do
376         eval "case $v in $pat) echo $v ;; esac"
377     done
378 }
379
380 filter_out(){
381     pat=$1
382     shift
383     for v; do
384         eval "case $v in $pat) ;; *) echo $v ;; esac"
385     done
386 }
387
388 map(){
389     m=$1
390     shift
391     for v; do eval $m; done
392 }
393
394 add_suffix(){
395     suffix=$1
396     shift
397     for v; do echo ${v}${suffix}; done
398 }
399
400 set_all(){
401     value=$1
402     shift
403     for var in $*; do
404         eval $var=$value
405     done
406 }
407
408 set_weak(){
409     value=$1
410     shift
411     for var; do
412         eval : \${$var:=$value}
413     done
414 }
415
416 sanitize_var_name(){
417     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
418 }
419
420 set_safe(){
421     var=$1
422     shift
423     eval $(sanitize_var_name "$var")='$*'
424 }
425
426 get_safe(){
427     eval echo \$$(sanitize_var_name "$1")
428 }
429
430 pushvar(){
431     for pvar in $*; do
432         eval level=\${${pvar}_level:=0}
433         eval ${pvar}_${level}="\$$pvar"
434         eval ${pvar}_level=$(($level+1))
435     done
436 }
437
438 popvar(){
439     for pvar in $*; do
440         eval level=\${${pvar}_level:-0}
441         test $level = 0 && continue
442         eval level=$(($level-1))
443         eval $pvar="\${${pvar}_${level}}"
444         eval ${pvar}_level=$level
445         eval unset ${pvar}_${level}
446     done
447 }
448
449 enable(){
450     set_all yes $*
451 }
452
453 disable(){
454     set_all no $*
455 }
456
457 enable_weak(){
458     set_weak yes $*
459 }
460
461 disable_weak(){
462     set_weak no $*
463 }
464
465 enable_safe(){
466     for var; do
467         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
468     done
469 }
470
471 disable_safe(){
472     for var; do
473         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
474     done
475 }
476
477 do_enable_deep(){
478     for var; do
479         enabled $var && continue
480         eval sel="\$${var}_select"
481         eval sgs="\$${var}_suggest"
482         pushvar var sgs
483         enable_deep $sel
484         popvar sgs
485         enable_deep_weak $sgs
486         popvar var
487     done
488 }
489
490 enable_deep(){
491     do_enable_deep $*
492     enable $*
493 }
494
495 enable_deep_weak(){
496     for var; do
497         disabled $var && continue
498         pushvar var
499         do_enable_deep $var
500         popvar var
501         enable_weak $var
502     done
503 }
504
505 enabled(){
506     test "${1#!}" = "$1" && op== || op=!=
507     eval test "x\$${1#!}" $op "xyes"
508 }
509
510 disabled(){
511     test "${1#!}" = "$1" && op== || op=!=
512     eval test "x\$${1#!}" $op "xno"
513 }
514
515 enabled_all(){
516     for opt; do
517         enabled $opt || return 1
518     done
519 }
520
521 disabled_all(){
522     for opt; do
523         disabled $opt || return 1
524     done
525 }
526
527 enabled_any(){
528     for opt; do
529         enabled $opt && return 0
530     done
531 }
532
533 disabled_any(){
534     for opt; do
535         disabled $opt && return 0
536     done
537     return 1
538 }
539
540 set_default(){
541     for opt; do
542         eval : \${$opt:=\$${opt}_default}
543     done
544 }
545
546 is_in(){
547     value=$1
548     shift
549     for var in $*; do
550         [ $var = $value ] && return 0
551     done
552     return 1
553 }
554
555 do_check_deps(){
556     for cfg; do
557         cfg="${cfg#!}"
558         enabled ${cfg}_checking && die "Circular dependency for $cfg."
559         disabled ${cfg}_checking && continue
560         enable ${cfg}_checking
561         append allopts $cfg
562
563         eval dep_all="\$${cfg}_deps"
564         eval dep_any="\$${cfg}_deps_any"
565         eval dep_sel="\$${cfg}_select"
566         eval dep_sgs="\$${cfg}_suggest"
567         eval dep_ifa="\$${cfg}_if"
568         eval dep_ifn="\$${cfg}_if_any"
569
570         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
571         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
572         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
573
574         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
575         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
576         enabled_all  $dep_all || disable $cfg
577         enabled_any  $dep_any || disable $cfg
578         disabled_any $dep_sel && disable $cfg
579
580         if enabled $cfg; then
581             enable_deep $dep_sel
582             enable_deep_weak $dep_sgs
583         fi
584
585         disable ${cfg}_checking
586     done
587 }
588
589 check_deps(){
590     unset allopts
591
592     do_check_deps "$@"
593
594     for cfg in $allopts; do
595         enabled $cfg || continue
596         eval dep_extralibs="\$${cfg}_extralibs"
597         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
598     done
599 }
600
601 print_config(){
602     pfx=$1
603     files=$2
604     shift 2
605     map 'eval echo "$v \${$v:-no}"' "$@" |
606     awk "BEGIN { split(\"$files\", files) }
607         {
608             c = \"$pfx\" toupper(\$1);
609             v = \$2;
610             sub(/yes/, 1, v);
611             sub(/no/,  0, v);
612             for (f in files) {
613                 file = files[f];
614                 if (file ~ /\\.h\$/) {
615                     printf(\"#define %s %d\\n\", c, v) >>file;
616                 } else if (file ~ /\\.asm\$/) {
617                     printf(\"%%define %s %d\\n\", c, v) >>file;
618                 } else if (file ~ /\\.mak\$/) {
619                     n = -v ? \"\" : \"!\";
620                     printf(\"%s%s=yes\\n\", n, c) >>file;
621                 }
622             }
623         }"
624 }
625
626 print_enabled(){
627     suf=$1
628     shift
629     for v; do
630         enabled $v && printf "%s\n" ${v%$suf};
631     done
632 }
633
634 append(){
635     var=$1
636     shift
637     eval "$var=\"\$$var $*\""
638 }
639
640 prepend(){
641     var=$1
642     shift
643     eval "$var=\"$* \$$var\""
644 }
645
646 add_cppflags(){
647     append CPPFLAGS "$@"
648 }
649
650 add_cflags(){
651     append CFLAGS $($cflags_filter "$@")
652 }
653
654 add_asflags(){
655     append ASFLAGS $($asflags_filter "$@")
656 }
657
658 add_ldflags(){
659     append LDFLAGS $($ldflags_filter "$@")
660 }
661
662 add_extralibs(){
663     prepend extralibs $($ldflags_filter "$@")
664 }
665
666 add_host_cppflags(){
667     append host_cppflags "$@"
668 }
669
670 add_host_cflags(){
671     append host_cflags $($host_cflags_filter "$@")
672 }
673
674 add_host_ldflags(){
675     append host_ldflags $($host_ldflags_filter "$@")
676 }
677
678 add_compat(){
679     append compat_objs $1
680     shift
681     map 'add_cppflags -D$v' "$@"
682 }
683
684 check_cmd(){
685     log "$@"
686     "$@" >> $logfile 2>&1
687 }
688
689 cc_o(){
690     eval printf '%s\\n' $CC_O
691 }
692
693 cc_e(){
694     eval printf '%s\\n' $CC_E
695 }
696
697 check_cc(){
698     log check_cc "$@"
699     cat > $TMPC
700     log_file $TMPC
701     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
702 }
703
704 check_cpp(){
705     log check_cpp "$@"
706     cat > $TMPC
707     log_file $TMPC
708     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
709 }
710
711 as_o(){
712     eval printf '%s\\n' $AS_O
713 }
714
715 check_as(){
716     log check_as "$@"
717     cat > $TMPS
718     log_file $TMPS
719     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
720 }
721
722 check_inline_asm(){
723     log check_inline_asm "$@"
724     name="$1"
725     code="$2"
726     shift 2
727     disable $name
728     check_cc "$@" <<EOF && enable $name
729 void foo(void){ __asm__ volatile($code); }
730 EOF
731 }
732
733 check_insn(){
734     log check_insn "$@"
735     check_inline_asm ${1}_inline "\"$2\""
736     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
737 }
738
739 check_yasm(){
740     log check_yasm "$@"
741     echo "$1" > $TMPS
742     log_file $TMPS
743     shift 1
744     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
745 }
746
747 ld_o(){
748     eval printf '%s\\n' $LD_O
749 }
750
751 check_ld(){
752     log check_ld "$@"
753     flags=$(filter_out '-l*' "$@")
754     libs=$(filter '-l*' "$@")
755     check_cc $($cflags_filter $flags) || return
756     flags=$($ldflags_filter $flags)
757     libs=$($ldflags_filter $libs)
758     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
759 }
760
761 check_code(){
762     log check_code "$@"
763     check=$1
764     headers=$2
765     code=$3
766     shift 3
767     {
768         for hdr in $headers; do
769             echo "#include <$hdr>"
770         done
771         echo "int main(void) { $code; return 0; }"
772     } | check_$check "$@"
773 }
774
775 check_cppflags(){
776     log check_cppflags "$@"
777     check_cc "$@" <<EOF && append CPPFLAGS "$@"
778 int x;
779 EOF
780 }
781
782 check_cflags(){
783     log check_cflags "$@"
784     set -- $($cflags_filter "$@")
785     check_cc "$@" <<EOF && append CFLAGS "$@"
786 int x;
787 EOF
788 }
789
790 test_ldflags(){
791     log test_ldflags "$@"
792     check_ld "$@" <<EOF
793 int main(void){ return 0; }
794 EOF
795 }
796
797 check_ldflags(){
798     log check_ldflags "$@"
799     test_ldflags "$@" && add_ldflags "$@"
800 }
801
802 check_header(){
803     log check_header "$@"
804     header=$1
805     shift
806     disable_safe $header
807     check_cpp "$@" <<EOF && enable_safe $header
808 #include <$header>
809 int x;
810 EOF
811 }
812
813 check_func(){
814     log check_func "$@"
815     func=$1
816     shift
817     disable $func
818     check_ld "$@" <<EOF && enable $func
819 extern int $func();
820 int main(void){ $func(); }
821 EOF
822 }
823
824 check_mathfunc(){
825     log check_mathfunc "$@"
826     func=$1
827     narg=$2
828     shift 2
829     test $narg = 2 && args="f, g" || args="f"
830     disable $func
831     check_ld "$@" <<EOF && enable $func
832 #include <math.h>
833 float foo(float f, float g) { return $func($args); }
834 int main(void){ return 0; }
835 EOF
836 }
837
838 check_func_headers(){
839     log check_func_headers "$@"
840     headers=$1
841     funcs=$2
842     shift 2
843     {
844         for hdr in $headers; do
845             echo "#include <$hdr>"
846         done
847         for func in $funcs; do
848             echo "long check_$func(void) { return (long) $func; }"
849         done
850         echo "int main(void) { return 0; }"
851     } | check_ld "$@" && enable $funcs && enable_safe $headers
852 }
853
854 check_cpp_condition(){
855     log check_cpp_condition "$@"
856     header=$1
857     condition=$2
858     shift 2
859     check_cpp "$@" <<EOF
860 #include <$header>
861 #if !($condition)
862 #error "unsatisfied condition: $condition"
863 #endif
864 EOF
865 }
866
867 check_lib(){
868     log check_lib "$@"
869     header="$1"
870     func="$2"
871     shift 2
872     check_header $header && check_func $func "$@" && add_extralibs "$@"
873 }
874
875 check_lib2(){
876     log check_lib2 "$@"
877     headers="$1"
878     funcs="$2"
879     shift 2
880     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
881 }
882
883 check_pkg_config(){
884     log check_pkg_config "$@"
885     pkg="$1"
886     headers="$2"
887     funcs="$3"
888     shift 3
889     check_cmd $pkg_config --exists --print-errors $pkg || return
890     pkg_cflags=$($pkg_config --cflags $pkg)
891     pkg_libs=$($pkg_config --libs $pkg)
892     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
893         set_safe ${pkg}_cflags $pkg_cflags   &&
894         set_safe ${pkg}_libs   $pkg_libs
895 }
896
897 check_exec(){
898     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
899 }
900
901 check_exec_crash(){
902     code=$(cat)
903
904     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
905     # are safe but may not be available everywhere.  Thus we use
906     # raise(SIGTERM) instead.  The check is run in a subshell so we
907     # can redirect the "Terminated" message from the shell.  SIGBUS
908     # is not defined by standard C so it is used conditionally.
909
910     (check_exec "$@") >> $logfile 2>&1 <<EOF
911 #include <signal.h>
912 static void sighandler(int sig){
913     raise(SIGTERM);
914 }
915 int foo(void){
916     $code
917 }
918 int (*func_ptr)(void) = foo;
919 int main(void){
920     signal(SIGILL, sighandler);
921     signal(SIGFPE, sighandler);
922     signal(SIGSEGV, sighandler);
923 #ifdef SIGBUS
924     signal(SIGBUS, sighandler);
925 #endif
926     return func_ptr();
927 }
928 EOF
929 }
930
931 check_type(){
932     log check_type "$@"
933     headers=$1
934     type=$2
935     shift 2
936     disable_safe "$type"
937     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
938 }
939
940 check_struct(){
941     log check_struct "$@"
942     headers=$1
943     struct=$2
944     member=$3
945     shift 3
946     disable_safe "${struct}_${member}"
947     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
948         enable_safe "${struct}_${member}"
949 }
950
951 check_builtin(){
952     log check_builtin "$@"
953     name=$1
954     headers=$2
955     builtin=$3
956     shift 3
957     disable "$name"
958     check_code ld "$headers" "$builtin" "$@" && enable "$name"
959 }
960
961 require(){
962     name="$1"
963     header="$2"
964     func="$3"
965     shift 3
966     check_lib $header $func "$@" || die "ERROR: $name not found"
967 }
968
969 require2(){
970     name="$1"
971     headers="$2"
972     func="$3"
973     shift 3
974     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
975 }
976
977 require_pkg_config(){
978     pkg="$1"
979     check_pkg_config "$@" || die "ERROR: $pkg not found"
980     add_cflags    $(get_safe ${pkg}_cflags)
981     add_extralibs $(get_safe ${pkg}_libs)
982 }
983
984 hostcc_o(){
985     eval printf '%s\\n' $HOSTCC_O
986 }
987
988 check_host_cc(){
989     log check_host_cc "$@"
990     cat > $TMPC
991     log_file $TMPC
992     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
993 }
994
995 check_host_cppflags(){
996     log check_host_cppflags "$@"
997     check_host_cc "$@" <<EOF && append host_cppflags "$@"
998 int x;
999 EOF
1000 }
1001
1002 check_host_cflags(){
1003     log check_host_cflags "$@"
1004     set -- $($host_cflags_filter "$@")
1005     check_host_cc "$@" <<EOF && append host_cflags "$@"
1006 int x;
1007 EOF
1008 }
1009
1010 apply(){
1011     file=$1
1012     shift
1013     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1014 }
1015
1016 cp_if_changed(){
1017     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1018     mkdir -p "$(dirname $2)"
1019     $cp_f "$1" "$2"
1020 }
1021
1022 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1023 # system-dependent things.
1024
1025 COMPONENT_LIST="
1026     bsfs
1027     decoders
1028     demuxers
1029     encoders
1030     filters
1031     hwaccels
1032     indevs
1033     muxers
1034     outdevs
1035     parsers
1036     protocols
1037 "
1038
1039 EXTERNAL_LIBRARY_LIST="
1040     avisynth
1041     bzlib
1042     frei0r
1043     gnutls
1044     libcdio
1045     libdc1394
1046     libfaac
1047     libfdk_aac
1048     libfreetype
1049     libgsm
1050     libilbc
1051     libmp3lame
1052     libopencore_amrnb
1053     libopencore_amrwb
1054     libopencv
1055     libopenjpeg
1056     libopus
1057     libpulse
1058     librtmp
1059     libschroedinger
1060     libspeex
1061     libtheora
1062     libvo_aacenc
1063     libvo_amrwbenc
1064     libvorbis
1065     libvpx
1066     libwavpack
1067     libx264
1068     libxavs
1069     libxvid
1070     openssl
1071     x11grab
1072     zlib
1073 "
1074
1075 HWACCEL_LIST="
1076     dxva2
1077     vaapi
1078     vda
1079     vdpau
1080 "
1081 LIBRARY_LIST="
1082     avcodec
1083     avdevice
1084     avfilter
1085     avformat
1086     avresample
1087     avutil
1088     swscale
1089 "
1090
1091 PROGRAM_LIST="
1092     avconv
1093     avplay
1094     avprobe
1095     avserver
1096 "
1097
1098 CONFIG_LIST="
1099     $COMPONENT_LIST
1100     $EXTERNAL_LIBRARY_LIST
1101     $HWACCEL_LIST
1102     $LIBRARY_LIST
1103     $PROGRAM_LIST
1104     dct
1105     doc
1106     error_resilience
1107     fft
1108     gpl
1109     gray
1110     hardcoded_tables
1111     lsp
1112     lzo
1113     mdct
1114     memalign_hack
1115     network
1116     nonfree
1117     pic
1118     rdft
1119     runtime_cpudetect
1120     safe_bitstream_reader
1121     shared
1122     small
1123     sram
1124     static
1125     swscale_alpha
1126     thumb
1127     version3
1128     xmm_clobber_test
1129 "
1130
1131 THREADS_LIST='
1132     pthreads
1133     w32threads
1134 '
1135
1136 ATOMICS_LIST='
1137     atomics_gcc
1138     atomics_suncc
1139     atomics_win32
1140 '
1141
1142 ARCH_LIST='
1143     aarch64
1144     alpha
1145     arm
1146     avr32
1147     avr32_ap
1148     avr32_uc
1149     bfin
1150     ia64
1151     m68k
1152     mips
1153     mips64
1154     parisc
1155     ppc
1156     ppc64
1157     s390
1158     sh4
1159     sparc
1160     sparc64
1161     tilegx
1162     tilepro
1163     tomi
1164     x86
1165     x86_32
1166     x86_64
1167 '
1168
1169 ARCH_EXT_LIST_ARM='
1170     armv5te
1171     armv6
1172     armv6t2
1173     neon
1174     vfp
1175     vfpv3
1176 '
1177
1178 ARCH_EXT_LIST_X86='
1179     amd3dnow
1180     amd3dnowext
1181     avx
1182     avx2
1183     fma4
1184     i686
1185     mmx
1186     mmxext
1187     sse
1188     sse2
1189     sse3
1190     sse4
1191     sse42
1192     ssse3
1193 '
1194
1195 ARCH_EXT_LIST="
1196     $ARCH_EXT_LIST_ARM
1197     $ARCH_EXT_LIST_X86
1198     altivec
1199     ppc4xx
1200     vis
1201 "
1202
1203 HAVE_LIST_CMDLINE='
1204     inline_asm
1205     symver
1206     yasm
1207 '
1208
1209 HAVE_LIST_PUB='
1210     bigendian
1211     fast_unaligned
1212 '
1213
1214 MATH_FUNCS="
1215     atanf
1216     atan2f
1217     cbrtf
1218     cosf
1219     exp2
1220     exp2f
1221     expf
1222     isinf
1223     isnan
1224     ldexpf
1225     llrint
1226     llrintf
1227     log2
1228     log2f
1229     log10f
1230     lrint
1231     lrintf
1232     powf
1233     rint
1234     round
1235     roundf
1236     sinf
1237     trunc
1238     truncf
1239 "
1240
1241 HAVE_LIST="
1242     $ARCH_EXT_LIST
1243     $(add_suffix _external $ARCH_EXT_LIST)
1244     $(add_suffix _inline   $ARCH_EXT_LIST)
1245     $HAVE_LIST_CMDLINE
1246     $HAVE_LIST_PUB
1247     $THREADS_LIST
1248     $ATOMICS_LIST
1249     $MATH_FUNCS
1250     aligned_malloc
1251     aligned_stack
1252     alsa_asoundlib_h
1253     altivec_h
1254     arpa_inet_h
1255     asm_mod_q
1256     asm_mod_y
1257     atomic_cas_ptr
1258     atomics_native
1259     attribute_may_alias
1260     attribute_packed
1261     cdio_paranoia_h
1262     cdio_paranoia_paranoia_h
1263     closesocket
1264     CommandLineToArgvW
1265     cpunop
1266     CryptGenRandom
1267     dcbzl
1268     dev_bktr_ioctl_bt848_h
1269     dev_bktr_ioctl_meteor_h
1270     dev_ic_bt8xx_h
1271     dev_video_bktr_ioctl_bt848_h
1272     dev_video_meteor_ioctl_meteor_h
1273     direct_h
1274     dlfcn_h
1275     dlopen
1276     dos_paths
1277     dxva_h
1278     ebp_available
1279     ebx_available
1280     fast_64bit
1281     fast_clz
1282     fast_cmov
1283     fcntl
1284     fork
1285     getaddrinfo
1286     gethrtime
1287     getopt
1288     GetProcessAffinityMask
1289     GetProcessMemoryInfo
1290     GetProcessTimes
1291     GetSystemTimeAsFileTime
1292     getrusage
1293     getservbyport
1294     gettimeofday
1295     gnu_as
1296     gsm_h
1297     ibm_asm
1298     inet_aton
1299     io_h
1300     inline_asm_labels
1301     isatty
1302     jack_port_get_latency_range
1303     ldbrx
1304     libdc1394_1
1305     libdc1394_2
1306     local_aligned_16
1307     local_aligned_8
1308     localtime_r
1309     loongson
1310     machine_ioctl_bt848_h
1311     machine_ioctl_meteor_h
1312     machine_rw_barrier
1313     malloc_h
1314     MapViewOfFile
1315     memalign
1316     MemoryBarrier
1317     mkstemp
1318     mm_empty
1319     mmap
1320     mprotect
1321     msvcrt
1322     nanosleep
1323     poll_h
1324     posix_memalign
1325     pragma_deprecated
1326     rdtsc
1327     sched_getaffinity
1328     sdl
1329     SetConsoleTextAttribute
1330     setmode
1331     setrlimit
1332     Sleep
1333     sndio_h
1334     socklen_t
1335     soundcard_h
1336     strerror_r
1337     strptime
1338     strtok_r
1339     struct_addrinfo
1340     struct_group_source_req
1341     struct_ip_mreq_source
1342     struct_ipv6_mreq
1343     struct_pollfd
1344     struct_rusage_ru_maxrss
1345     struct_sockaddr_in6
1346     struct_sockaddr_sa_len
1347     struct_sockaddr_storage
1348     struct_v4l2_frmivalenum_discrete
1349     symver_asm_label
1350     symver_gnu_asm
1351     sync_val_compare_and_swap
1352     sysconf
1353     sysctl
1354     sys_mman_h
1355     sys_param_h
1356     sys_resource_h
1357     sys_select_h
1358     sys_soundcard_h
1359     sys_time_h
1360     sys_un_h
1361     sys_videoio_h
1362     threads
1363     unistd_h
1364     usleep
1365     vfp_args
1366     VirtualAlloc
1367     windows_h
1368     winsock2_h
1369     xform_asm
1370     xmm_clobbers
1371 "
1372
1373 # options emitted with CONFIG_ prefix but not available on the command line
1374 CONFIG_EXTRA="
1375     aandcttables
1376     ac3dsp
1377     audio_frame_queue
1378     dsputil
1379     gcrypt
1380     golomb
1381     gplv3
1382     h264chroma
1383     h264dsp
1384     h264pred
1385     h264qpel
1386     hpeldsp
1387     huffman
1388     lgplv3
1389     lpc
1390     mpegaudio
1391     mpegaudiodsp
1392     mpegvideo
1393     mpegvideoenc
1394     nettle
1395     rangecoder
1396     riffdec
1397     riffenc
1398     rtpdec
1399     rtpenc_chain
1400     sinewin
1401     videodsp
1402     vp3dsp
1403 "
1404
1405 CMDLINE_SELECT="
1406     $ARCH_EXT_LIST
1407     $CONFIG_LIST
1408     $HAVE_LIST_CMDLINE
1409     $THREADS_LIST
1410     asm
1411     cross_compile
1412     debug
1413     extra_warnings
1414     logging
1415     lto
1416     optimizations
1417 "
1418
1419 PATHS_LIST='
1420     bindir
1421     datadir
1422     docdir
1423     incdir
1424     libdir
1425     mandir
1426     prefix
1427     shlibdir
1428 '
1429
1430 CMDLINE_SET="
1431     $PATHS_LIST
1432     ar
1433     arch
1434     as
1435     build_suffix
1436     cc
1437     cpu
1438     cross_prefix
1439     dep_cc
1440     extra_version
1441     host_cc
1442     host_cflags
1443     host_ld
1444     host_ldflags
1445     host_libs
1446     host_os
1447     ld
1448     logfile
1449     malloc_prefix
1450     nm
1451     optflags
1452     pkg_config
1453     random_seed
1454     samples
1455     sysinclude
1456     sysroot
1457     target_exec
1458     target_os
1459     target_path
1460     target_samples
1461     toolchain
1462 "
1463
1464 CMDLINE_APPEND="
1465     extra_cflags
1466     host_cppflags
1467 "
1468
1469 # code dependency declarations
1470
1471 # architecture extensions
1472
1473 armv5te_deps="arm"
1474 armv6_deps="arm"
1475 armv6t2_deps="arm"
1476 neon_deps="arm"
1477 vfp_deps="arm"
1478 vfpv3_deps="vfp"
1479
1480 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1481
1482 altivec_deps="ppc"
1483 ppc4xx_deps="ppc"
1484
1485 vis_deps="sparc"
1486
1487 cpunop_deps="i686"
1488 x86_64_select="i686"
1489 x86_64_suggest="fast_cmov"
1490
1491 amd3dnow_deps="mmx"
1492 amd3dnowext_deps="amd3dnow"
1493 mmx_deps="x86"
1494 mmxext_deps="mmx"
1495 sse_deps="mmxext"
1496 sse2_deps="sse"
1497 sse3_deps="sse2"
1498 ssse3_deps="sse3"
1499 sse4_deps="ssse3"
1500 sse42_deps="sse4"
1501 avx_deps="sse42"
1502 fma4_deps="avx"
1503 avx2_deps="avx"
1504
1505 mmx_external_deps="yasm"
1506 mmx_inline_deps="inline_asm"
1507 mmx_suggest="mmx_external mmx_inline"
1508
1509 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86); do
1510     eval dep=\$${ext}_deps
1511     eval ${ext}_external_deps='"${dep}_external"'
1512     eval ${ext}_inline_deps='"${dep}_inline"'
1513     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1514 done
1515
1516 aligned_stack_if_any="ppc x86"
1517 fast_64bit_if_any="alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1518 fast_clz_if_any="alpha avr32 mips ppc x86"
1519 fast_unaligned_if_any="ppc x86"
1520
1521 inline_asm_deps="!tms470"
1522 need_memalign="altivec neon sse"
1523
1524 symver_if_any="symver_asm_label symver_gnu_asm"
1525
1526 log2_deps="!msvcrt"
1527
1528 # subsystems
1529 dct_select="rdft"
1530 error_resilience_select="dsputil"
1531 lpc_select="dsputil"
1532 mdct_select="fft"
1533 rdft_select="fft"
1534 mpegaudio_select="mpegaudiodsp"
1535 mpegaudiodsp_select="dct"
1536 mpegvideo_select="dsputil hpeldsp videodsp"
1537 mpegvideoenc_select="mpegvideo"
1538
1539 # decoders / encoders
1540 aac_decoder_select="mdct sinewin"
1541 aac_encoder_select="audio_frame_queue mdct sinewin"
1542 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1543 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1544 ac3_encoder_select="mdct ac3dsp dsputil"
1545 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1546 aic_decoder_select="dsputil golomb"
1547 alac_encoder_select="lpc"
1548 als_decoder_select="dsputil"
1549 amrnb_decoder_select="lsp"
1550 amrwb_decoder_select="lsp"
1551 amv_decoder_select="dsputil hpeldsp"
1552 ape_decoder_select="dsputil"
1553 asv1_decoder_select="dsputil"
1554 asv1_encoder_select="dsputil"
1555 asv2_decoder_select="dsputil"
1556 asv2_encoder_select="dsputil"
1557 atrac1_decoder_select="mdct sinewin"
1558 atrac3_decoder_select="mdct"
1559 bink_decoder_select="dsputil hpeldsp"
1560 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
1561 binkaudio_rdft_decoder_select="mdct rdft sinewin"
1562 cavs_decoder_select="dsputil golomb h264chroma videodsp"
1563 cllc_decoder_select="dsputil"
1564 comfortnoise_encoder_select="lpc"
1565 cook_decoder_select="dsputil mdct sinewin"
1566 cscd_decoder_select="lzo"
1567 cscd_decoder_suggest="zlib"
1568 dca_decoder_select="mdct"
1569 dnxhd_decoder_select="dsputil"
1570 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
1571 dvvideo_decoder_select="dsputil"
1572 dvvideo_encoder_select="dsputil"
1573 dxa_decoder_deps="zlib"
1574 eac3_decoder_select="ac3_decoder"
1575 eac3_encoder_select="ac3_encoder"
1576 eamad_decoder_select="aandcttables dsputil mpegvideo"
1577 eatgq_decoder_select="aandcttables dsputil"
1578 eatqi_decoder_select="aandcttables error_resilience mpegvideo"
1579 ffv1_decoder_select="dsputil golomb rangecoder"
1580 ffv1_encoder_select="dsputil rangecoder"
1581 ffvhuff_decoder_select="dsputil"
1582 ffvhuff_encoder_select="dsputil huffman"
1583 flac_decoder_select="golomb"
1584 flac_encoder_select="dsputil golomb lpc"
1585 flashsv_decoder_deps="zlib"
1586 flashsv_encoder_deps="zlib"
1587 flashsv2_decoder_deps="zlib"
1588 flv_decoder_select="h263_decoder"
1589 flv_encoder_select="h263_encoder"
1590 fourxm_decoder_select="dsputil"
1591 fraps_decoder_select="dsputil huffman"
1592 g2m_decoder_deps="zlib"
1593 g2m_decoder_select="dsputil"
1594 h261_decoder_select="error_resilience mpegvideo"
1595 h261_encoder_select="aandcttables mpegvideoenc"
1596 h263_decoder_select="error_resilience h263_parser mpegvideo"
1597 h263_encoder_select="aandcttables mpegvideoenc"
1598 h263i_decoder_select="h263_decoder"
1599 h263p_encoder_select="h263_encoder"
1600 h264_decoder_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1601 h264_decoder_suggest="error_resilience"
1602 huffyuv_decoder_select="dsputil"
1603 huffyuv_encoder_select="dsputil huffman"
1604 iac_decoder_select="dsputil fft mdct sinewin"
1605 imc_decoder_select="dsputil fft mdct sinewin"
1606 indeo3_decoder_select="hpeldsp"
1607 interplay_video_decoder_select="hpeldsp"
1608 jpegls_decoder_select="dsputil golomb hpeldsp"
1609 jpegls_encoder_select="golomb"
1610 jv_decoder_select="dsputil"
1611 lagarith_decoder_select="dsputil"
1612 ljpeg_encoder_select="aandcttables mpegvideoenc"
1613 loco_decoder_select="golomb"
1614 mdec_decoder_select="dsputil error_resilience mpegvideo"
1615 metasound_decoder_select="lsp mdct sinewin"
1616 mimic_decoder_select="dsputil hpeldsp"
1617 mjpeg_decoder_select="dsputil hpeldsp"
1618 mjpegb_decoder_select="dsputil hpeldsp"
1619 mjpeg_encoder_select="aandcttables dsputil mpegvideoenc"
1620 mlp_decoder_select="dsputil mlp_parser"
1621 motionpixels_decoder_select="dsputil"
1622 mp1_decoder_select="mpegaudio"
1623 mp1float_decoder_select="mpegaudio"
1624 mp2_decoder_select="mpegaudio"
1625 mp2float_decoder_select="mpegaudio"
1626 mp3_decoder_select="mpegaudio"
1627 mp3adu_decoder_select="mpegaudio"
1628 mp3adufloat_decoder_select="mpegaudio"
1629 mp3float_decoder_select="mpegaudio"
1630 mp3on4_decoder_select="mpegaudio"
1631 mp3on4float_decoder_select="mpegaudio"
1632 mpc7_decoder_select="dsputil mpegaudiodsp"
1633 mpc8_decoder_select="dsputil mpegaudiodsp"
1634 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1635 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1636 mpeg1video_decoder_select="error_resilience mpegvideo"
1637 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1638 mpeg2video_decoder_select="error_resilience mpegvideo"
1639 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1640 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1641 mpeg4_encoder_select="h263_encoder"
1642 msmpeg4v1_decoder_select="h263_decoder"
1643 msmpeg4v2_decoder_select="h263_decoder"
1644 msmpeg4v2_encoder_select="h263_encoder"
1645 msmpeg4v3_decoder_select="h263_decoder"
1646 msmpeg4v3_encoder_select="h263_encoder"
1647 mss2_decoder_select="error_resilience vc1_decoder"
1648 mxpeg_decoder_select="dsputil hpeldsp"
1649 nellymoser_decoder_select="mdct sinewin"
1650 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1651 nuv_decoder_select="dsputil lzo"
1652 png_decoder_deps="zlib"
1653 png_decoder_select="dsputil"
1654 png_encoder_deps="zlib"
1655 png_encoder_select="dsputil"
1656 prores_decoder_select="dsputil"
1657 prores_encoder_select="dsputil"
1658 qcelp_decoder_select="lsp"
1659 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1660 ra_144_encoder_select="audio_frame_queue lpc"
1661 ralf_decoder_select="golomb"
1662 rv10_decoder_select="error_resilience h263_decoder"
1663 rv10_encoder_select="h263_encoder"
1664 rv20_decoder_select="error_resilience h263_decoder"
1665 rv20_encoder_select="h263_encoder"
1666 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1667 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1668 shorten_decoder_select="golomb"
1669 sipr_decoder_select="lsp"
1670 sp5x_decoder_select="dsputil hpeldsp"
1671 svq1_decoder_select="hpeldsp"
1672 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
1673 svq3_decoder_select="golomb h264chroma h264dsp h264pred h264qpel hpeldsp mpegvideo videodsp"
1674 svq3_decoder_suggest="error_resilience zlib"
1675 tak_decoder_select="dsputil"
1676 theora_decoder_select="vp3_decoder"
1677 tiff_decoder_suggest="zlib"
1678 tiff_encoder_suggest="zlib"
1679 thp_decoder_select="dsputil hpeldsp"
1680 truehd_decoder_select="mlp_decoder"
1681 truemotion2_decoder_select="dsputil"
1682 truespeech_decoder_select="dsputil"
1683 tscc_decoder_deps="zlib"
1684 twinvq_decoder_select="mdct lsp sinewin"
1685 utvideo_decoder_select="dsputil"
1686 utvideo_encoder_select="dsputil huffman"
1687 vble_decoder_select="dsputil"
1688 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel"
1689 vc1image_decoder_select="vc1_decoder"
1690 vorbis_decoder_select="mdct"
1691 vorbis_encoder_select="mdct"
1692 vp3_decoder_select="hpeldsp vp3dsp videodsp"
1693 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
1694 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
1695 vp6a_decoder_select="vp6_decoder"
1696 vp6f_decoder_select="vp6_decoder"
1697 vp8_decoder_select="h264pred videodsp"
1698 webp_decoder_select="vp8_decoder"
1699 wmapro_decoder_select="mdct sinewin"
1700 wmav1_decoder_select="mdct sinewin"
1701 wmav1_encoder_select="mdct sinewin"
1702 wmav2_decoder_select="mdct sinewin"
1703 wmav2_encoder_select="mdct sinewin"
1704 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
1705 wmv1_decoder_select="h263_decoder"
1706 wmv1_encoder_select="h263_encoder"
1707 wmv2_decoder_select="h263_decoder videodsp"
1708 wmv2_encoder_select="h263_encoder"
1709 wmv3_decoder_select="vc1_decoder"
1710 wmv3image_decoder_select="wmv3_decoder"
1711 zerocodec_decoder_deps="zlib"
1712 zlib_decoder_deps="zlib"
1713 zlib_encoder_deps="zlib"
1714 zmbv_decoder_deps="zlib"
1715 zmbv_encoder_deps="zlib"
1716
1717 # hardware accelerators
1718 dxva2_deps="dxva2api_h"
1719 vaapi_deps="va_va_h"
1720 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
1721 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
1722 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
1723
1724 h263_vaapi_hwaccel_deps="vaapi"
1725 h263_vaapi_hwaccel_select="h263_decoder"
1726 h263_vdpau_hwaccel_deps="vdpau"
1727 h263_vdpau_hwaccel_select="h263_decoder"
1728 h264_dxva2_hwaccel_deps="dxva2"
1729 h264_dxva2_hwaccel_select="h264_decoder"
1730 h264_vaapi_hwaccel_deps="vaapi"
1731 h264_vaapi_hwaccel_select="h264_decoder"
1732 h264_vda_hwaccel_deps="vda"
1733 h264_vda_hwaccel_select="h264_decoder"
1734 h264_vdpau_hwaccel_deps="vdpau"
1735 h264_vdpau_hwaccel_select="h264_decoder"
1736 mpeg1_vdpau_hwaccel_deps="vdpau"
1737 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
1738 mpeg2_dxva2_hwaccel_deps="dxva2"
1739 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
1740 mpeg2_vaapi_hwaccel_deps="vaapi"
1741 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
1742 mpeg2_vdpau_hwaccel_deps="vdpau"
1743 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
1744 mpeg4_vaapi_hwaccel_deps="vaapi"
1745 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
1746 mpeg4_vdpau_hwaccel_deps="vdpau"
1747 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
1748 vc1_dxva2_hwaccel_deps="dxva2"
1749 vc1_dxva2_hwaccel_select="vc1_decoder"
1750 vc1_vaapi_hwaccel_deps="vaapi"
1751 vc1_vaapi_hwaccel_select="vc1_decoder"
1752 vc1_vdpau_hwaccel_deps="vdpau"
1753 vc1_vdpau_hwaccel_select="vc1_decoder"
1754 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
1755 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
1756 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
1757
1758 # parsers
1759 h264_parser_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1760 mpeg4video_parser_select="error_resilience mpegvideo"
1761 mpegvideo_parser_select="error_resilience mpegvideo"
1762 vc1_parser_select="mpegvideo"
1763
1764 # external libraries
1765 libfaac_encoder_deps="libfaac"
1766 libfaac_encoder_select="audio_frame_queue"
1767 libfdk_aac_decoder_deps="libfdk_aac"
1768 libfdk_aac_encoder_deps="libfdk_aac"
1769 libfdk_aac_encoder_select="audio_frame_queue"
1770 libgsm_decoder_deps="libgsm"
1771 libgsm_encoder_deps="libgsm"
1772 libgsm_ms_decoder_deps="libgsm"
1773 libgsm_ms_encoder_deps="libgsm"
1774 libilbc_decoder_deps="libilbc"
1775 libilbc_encoder_deps="libilbc"
1776 libmp3lame_encoder_deps="libmp3lame"
1777 libmp3lame_encoder_select="audio_frame_queue"
1778 libopencore_amrnb_decoder_deps="libopencore_amrnb"
1779 libopencore_amrnb_encoder_deps="libopencore_amrnb"
1780 libopencore_amrnb_encoder_select="audio_frame_queue"
1781 libopencore_amrwb_decoder_deps="libopencore_amrwb"
1782 libopenjpeg_decoder_deps="libopenjpeg"
1783 libopenjpeg_encoder_deps="libopenjpeg"
1784 libopus_decoder_deps="libopus"
1785 libopus_encoder_deps="libopus"
1786 libopus_encoder_select="audio_frame_queue"
1787 libschroedinger_decoder_deps="libschroedinger"
1788 libschroedinger_encoder_deps="libschroedinger"
1789 libspeex_decoder_deps="libspeex"
1790 libspeex_encoder_deps="libspeex"
1791 libspeex_encoder_select="audio_frame_queue"
1792 libtheora_encoder_deps="libtheora"
1793 libvo_aacenc_encoder_deps="libvo_aacenc"
1794 libvo_aacenc_encoder_select="audio_frame_queue"
1795 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
1796 libvorbis_encoder_deps="libvorbis"
1797 libvorbis_encoder_select="audio_frame_queue"
1798 libvpx_vp8_decoder_deps="libvpx"
1799 libvpx_vp8_encoder_deps="libvpx"
1800 libvpx_vp9_decoder_deps="libvpx"
1801 libvpx_vp9_encoder_deps="libvpx"
1802 libwavpack_encoder_deps="libwavpack"
1803 libx264_encoder_deps="libx264"
1804 libxavs_encoder_deps="libxavs"
1805 libxvid_encoder_deps="libxvid"
1806
1807 # demuxers / muxers
1808 ac3_demuxer_select="ac3_parser"
1809 asf_demuxer_select="riffdec"
1810 asf_muxer_select="riffenc"
1811 asf_stream_muxer_select="asf_muxer"
1812 avi_demuxer_select="riffdec"
1813 avi_muxer_select="riffenc"
1814 avisynth_demuxer_deps="avisynth"
1815 avisynth_demuxer_select="riffdec"
1816 caf_demuxer_select="riffdec"
1817 dirac_demuxer_select="dirac_parser"
1818 dxa_demuxer_select="riffdec"
1819 eac3_demuxer_select="ac3_parser"
1820 f4v_muxer_select="mov_muxer"
1821 flac_demuxer_select="flac_parser"
1822 hls_muxer_select="mpegts_muxer"
1823 ipod_muxer_select="mov_muxer"
1824 ismv_muxer_select="mov_muxer"
1825 matroska_audio_muxer_select="matroska_muxer"
1826 matroska_demuxer_select="riffdec"
1827 matroska_demuxer_suggest="bzlib lzo zlib"
1828 matroska_muxer_select="riffenc"
1829 mmf_muxer_select="riffenc"
1830 mov_demuxer_select="riffdec"
1831 mov_demuxer_suggest="zlib"
1832 mov_muxer_select="riffenc rtpenc_chain"
1833 mp3_demuxer_select="mpegaudio_parser"
1834 mp4_muxer_select="mov_muxer"
1835 mpegts_muxer_select="adts_muxer latm_muxer"
1836 mpegtsraw_demuxer_select="mpegts_demuxer"
1837 mxf_d10_muxer_select="mxf_muxer"
1838 nut_muxer_select="riffenc"
1839 nuv_demuxer_select="riffdec"
1840 ogg_demuxer_select="golomb"
1841 psp_muxer_select="mov_muxer"
1842 rtp_demuxer_select="sdp_demuxer"
1843 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
1844 rtsp_demuxer_select="http_protocol rtpdec"
1845 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
1846 sap_demuxer_select="sdp_demuxer"
1847 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
1848 sdp_demuxer_select="rtpdec"
1849 smoothstreaming_muxer_select="ismv_muxer"
1850 spdif_muxer_select="aac_parser"
1851 tak_demuxer_select="tak_parser"
1852 tg2_muxer_select="mov_muxer"
1853 tgp_muxer_select="mov_muxer"
1854 w64_demuxer_select="wav_demuxer"
1855 wav_demuxer_select="riffdec"
1856 wav_muxer_select="riffenc"
1857 webm_muxer_select="riffenc"
1858 wtv_demuxer_select="riffdec"
1859 xmv_demuxer_select="riffdec"
1860 xwma_demuxer_select="riffdec"
1861
1862 # indevs / outdevs
1863 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
1864 alsa_outdev_deps="alsa_asoundlib_h"
1865 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
1866 dv1394_indev_deps="dv1394"
1867 dv1394_indev_select="dv_demuxer"
1868 fbdev_indev_deps="linux_fb_h"
1869 jack_indev_deps="jack_jack_h pthreads"
1870 libcdio_indev_deps="libcdio"
1871 libdc1394_indev_deps="libdc1394"
1872 oss_indev_deps_any="soundcard_h sys_soundcard_h"
1873 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
1874 pulse_indev_deps="libpulse"
1875 sndio_indev_deps="sndio_h"
1876 sndio_outdev_deps="sndio_h"
1877 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
1878 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
1879 vfwcap_indev_extralibs="-lavicap32"
1880 x11grab_indev_deps="x11grab XShmCreateImage"
1881
1882 # protocols
1883 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
1884 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
1885 ffrtmpcrypt_protocol_select="tcp_protocol"
1886 ffrtmphttp_protocol_deps="!librtmp_protocol"
1887 ffrtmphttp_protocol_select="http_protocol"
1888 gopher_protocol_select="network"
1889 httpproxy_protocol_select="tcp_protocol"
1890 http_protocol_select="tcp_protocol"
1891 https_protocol_select="tls_protocol"
1892 librtmp_protocol_deps="librtmp"
1893 librtmpe_protocol_deps="librtmp"
1894 librtmps_protocol_deps="librtmp"
1895 librtmpt_protocol_deps="librtmp"
1896 librtmpte_protocol_deps="librtmp"
1897 mmsh_protocol_select="http_protocol"
1898 mmst_protocol_select="network"
1899 rtmp_protocol_deps="!librtmp_protocol"
1900 rtmp_protocol_select="tcp_protocol"
1901 rtmpe_protocol_select="ffrtmpcrypt_protocol"
1902 rtmps_protocol_deps="!librtmp_protocol"
1903 rtmps_protocol_select="tls_protocol"
1904 rtmpt_protocol_select="ffrtmphttp_protocol"
1905 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
1906 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
1907 rtp_protocol_select="udp_protocol"
1908 sctp_protocol_deps="struct_sctp_event_subscribe"
1909 sctp_protocol_select="network"
1910 srtp_protocol_select="rtp_protocol"
1911 tcp_protocol_select="network"
1912 tls_protocol_deps_any="openssl gnutls"
1913 tls_protocol_select="tcp_protocol"
1914 udp_protocol_select="network"
1915 unix_protocol_deps="sys_un_h"
1916 unix_protocol_select="network"
1917
1918 # filters
1919 blackframe_filter_deps="gpl"
1920 boxblur_filter_deps="gpl"
1921 cropdetect_filter_deps="gpl"
1922 delogo_filter_deps="gpl"
1923 drawtext_filter_deps="libfreetype"
1924 frei0r_filter_deps="frei0r dlopen strtok_r"
1925 frei0r_filter_extralibs='$ldl'
1926 frei0r_src_filter_deps="frei0r dlopen strtok_r"
1927 frei0r_src_filter_extralibs='$ldl'
1928 hqdn3d_filter_deps="gpl"
1929 interlace_filter_deps="gpl"
1930 resample_filter_deps="avresample"
1931 ocv_filter_deps="libopencv"
1932 scale_filter_deps="swscale"
1933 yadif_filter_deps="gpl"
1934
1935 # libraries
1936 avcodec_deps="avutil"
1937 avdevice_deps="avutil avcodec avformat"
1938 avfilter_deps="avutil"
1939 avformat_deps="avutil avcodec"
1940 avresample_deps="avutil"
1941 swscale_deps="avutil"
1942
1943 # programs
1944 avconv_deps="avcodec avfilter avformat avresample swscale"
1945 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
1946                fps_filter null_filter resample_filter scale_filter
1947                setpts_filter trim_filter"
1948 avplay_deps="avcodec avformat avresample swscale sdl"
1949 avplay_select="rdft"
1950 avprobe_deps="avcodec avformat"
1951 avserver_deps="avformat fork !shared"
1952 avserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
1953 avserver_extralibs='$ldl'
1954
1955 doc_deps="texi2html"
1956
1957 # default parameters
1958
1959 logfile="config.log"
1960
1961 # installation paths
1962 prefix_default="/usr/local"
1963 bindir_default='${prefix}/bin'
1964 datadir_default='${prefix}/share/avconv'
1965 docdir_default='${prefix}/share/doc/libav'
1966 incdir_default='${prefix}/include'
1967 libdir_default='${prefix}/lib'
1968 mandir_default='${prefix}/share/man'
1969 shlibdir_default="$libdir_default"
1970
1971 # toolchain
1972 ar_default="ar"
1973 cc_default="gcc"
1974 host_cc_default="gcc"
1975 cp_f="cp -f"
1976 ln_s="ln -s -f"
1977 nm_default="nm -g"
1978 objformat="elf"
1979 pkg_config_default=pkg-config
1980 ranlib="ranlib"
1981 strip="strip"
1982 yasmexe="yasm"
1983
1984 nogas=":"
1985
1986 # machine
1987 arch_default=$(uname -m)
1988 cpu="generic"
1989
1990 # OS
1991 target_os_default=$(tolower $(uname -s))
1992 host_os=$target_os_default
1993
1994 # configurable options
1995 enable $LIBRARY_LIST $PROGRAM_LIST
1996
1997 enable asm
1998 enable debug
1999 enable doc
2000 enable optimizations
2001 enable safe_bitstream_reader
2002 enable static
2003 enable swscale_alpha
2004
2005 # By default, enable only those hwaccels that have no external dependencies.
2006 enable dxva2 vdpau
2007
2008 # build settings
2009 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2010 LIBPREF="lib"
2011 LIBSUF=".a"
2012 FULLNAME='$(NAME)$(BUILDSUF)'
2013 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2014 SLIBPREF="lib"
2015 SLIBSUF=".so"
2016 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2017 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2018 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2019 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2020 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2021 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2022
2023 asflags_filter=echo
2024 cflags_filter=echo
2025 ldflags_filter=echo
2026
2027 AS_C='-c'
2028 AS_O='-o $@'
2029 CC_C='-c'
2030 CC_E='-E -o $@'
2031 CC_O='-o $@'
2032 LD_O='-o $@'
2033 LD_LIB='-l%'
2034 LD_PATH='-L'
2035 HOSTCC_C='-c'
2036 HOSTCC_O='-o $@'
2037 HOSTLD_O='-o $@'
2038
2039 host_cflags='-O3 -g'
2040 host_cppflags='-D_ISOC99_SOURCE -D_XOPEN_SOURCE=600'
2041 host_libs='-lm'
2042 host_cflags_filter=echo
2043 host_ldflags_filter=echo
2044
2045 target_path='$(CURDIR)'
2046
2047 # since the object filename is not given with the -MM flag, the compiler
2048 # is only able to print the basename, and we must add the path ourselves
2049 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2050 DEPFLAGS='-MM'
2051
2052 # find source path
2053 if test -f configure; then
2054     source_path=.
2055 else
2056     source_path=$(cd $(dirname "$0"); pwd)
2057     echo "$source_path" | grep -q '[[:blank:]]' &&
2058         die "Out of tree builds are impossible with whitespace in source path."
2059     test -e "$source_path/config.h" &&
2060         die "Out of tree builds are impossible with config.h in source dir."
2061 fi
2062
2063 for v in "$@"; do
2064     r=${v#*=}
2065     l=${v%"$r"}
2066     r=$(sh_quote "$r")
2067     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2068 done
2069
2070 find_things(){
2071     thing=$1
2072     pattern=$2
2073     file=$source_path/$3
2074     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2075 }
2076
2077 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2078 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2079 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2080 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2081 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2082 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2083 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2084 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2085 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2086 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2087 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2088
2089 ALL_COMPONENTS="
2090     $BSF_LIST
2091     $DECODER_LIST
2092     $DEMUXER_LIST
2093     $ENCODER_LIST
2094     $FILTER_LIST
2095     $HWACCEL_LIST
2096     $INDEV_LIST
2097     $MUXER_LIST
2098     $OUTDEV_LIST
2099     $PARSER_LIST
2100     $PROTOCOL_LIST
2101 "
2102
2103 for n in $COMPONENT_LIST; do
2104     v=$(toupper ${n%s})_LIST
2105     eval enable \$$v
2106     eval ${n}_if_any="\$$v"
2107 done
2108
2109 enable $ARCH_EXT_LIST
2110
2111 die_unknown(){
2112     echo "Unknown option \"$1\"."
2113     echo "See $0 --help for available options."
2114     exit 1
2115 }
2116
2117 print_3_columns() {
2118     cat | tr ' ' '\n' | sort | pr -r -3 -t
2119 }
2120
2121 show_list() {
2122     suffix=_$1
2123     shift
2124     echo $* | sed s/$suffix//g | print_3_columns
2125     exit 0
2126 }
2127
2128 rand_list(){
2129     IFS=', '
2130     set -- $*
2131     unset IFS
2132     for thing; do
2133         comp=${thing%:*}
2134         prob=${thing#$comp}
2135         prob=${prob#:}
2136         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2137         echo "prob ${prob:-0.5}"
2138         printf '%s\n' $comp
2139     done
2140 }
2141
2142 do_random(){
2143     action=$1
2144     shift
2145     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2146     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2147 }
2148
2149 for opt do
2150     optval="${opt#*=}"
2151     case "$opt" in
2152         --extra-ldflags=*)
2153             add_ldflags $optval
2154         ;;
2155         --extra-libs=*)
2156             add_extralibs $optval
2157         ;;
2158         --disable-devices)
2159             disable $INDEV_LIST $OUTDEV_LIST
2160         ;;
2161         --enable-debug=*)
2162             debuglevel="$optval"
2163         ;;
2164         --disable-programs)
2165             disable $PROGRAM_LIST
2166         ;;
2167         --disable-everything)
2168             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2169         ;;
2170         --disable-all)
2171             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2172             disable $LIBRARY_LIST $PROGRAM_LIST doc
2173         ;;
2174         --enable-random|--disable-random)
2175             action=${opt%%-random}
2176             do_random ${action#--} $COMPONENT_LIST
2177         ;;
2178         --enable-random=*|--disable-random=*)
2179             action=${opt%%-random=*}
2180             do_random ${action#--} $optval
2181         ;;
2182         --enable-*=*|--disable-*=*)
2183             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2184             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2185             eval list=\$$(toupper $thing)_LIST
2186             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2187             $action $(filter "$name" $list)
2188         ;;
2189         --enable-?*|--disable-?*)
2190             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2191             if is_in $option $COMPONENT_LIST; then
2192                 test $action = disable && action=unset
2193                 eval $action \$$(toupper ${option%s})_LIST
2194             elif is_in $option $CMDLINE_SELECT; then
2195                 $action $option
2196             else
2197                 die_unknown $opt
2198             fi
2199         ;;
2200         --list-*)
2201             NAME="${opt#--list-}"
2202             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2203             NAME=${NAME%s}
2204             eval show_list $NAME \$$(toupper $NAME)_LIST
2205         ;;
2206         --help|-h) show_help
2207         ;;
2208         *)
2209             optname="${opt%%=*}"
2210             optname="${optname#--}"
2211             optname=$(echo "$optname" | sed 's/-/_/g')
2212             if is_in $optname $CMDLINE_SET; then
2213                 eval $optname='$optval'
2214             elif is_in $optname $CMDLINE_APPEND; then
2215                 append $optname "$optval"
2216             else
2217                 die_unknown $opt
2218             fi
2219         ;;
2220     esac
2221 done
2222
2223 disabled logging && logfile=/dev/null
2224
2225 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2226 set >> $logfile
2227
2228 test -n "$cross_prefix" && enable cross_compile
2229
2230 if enabled cross_compile; then
2231     test -n "$arch" && test -n "$target_os" ||
2232         die "Must specify target arch and OS when cross-compiling"
2233 fi
2234
2235 ar_default="${cross_prefix}${ar_default}"
2236 cc_default="${cross_prefix}${cc_default}"
2237 nm_default="${cross_prefix}${nm_default}"
2238 pkg_config_default="${cross_prefix}${pkg_config_default}"
2239 ranlib="${cross_prefix}${ranlib}"
2240 strip="${cross_prefix}${strip}"
2241
2242 sysinclude_default="${sysroot}/usr/include"
2243
2244 case "$toolchain" in
2245     clang-asan)
2246         cc_default="clang"
2247         add_cflags  -fsanitize=address
2248         add_ldflags -fsanitize=address
2249     ;;
2250     clang-tsan)
2251         cc_default="clang"
2252         add_cflags  -fsanitize=thread -pie
2253         add_ldflags -fsanitize=thread -pie
2254     ;;
2255     gcc-asan)
2256         cc_default="gcc"
2257         add_cflags  -fsanitize=address
2258         add_ldflags -fsanitize=address
2259     ;;
2260     gcc-tsan)
2261         cc_default="gcc"
2262         add_cflags  -fsanitize=thread -pie -fPIC
2263         add_ldflags -fsanitize=thread -pie -fPIC
2264     ;;
2265     valgrind-massif)
2266         target_exec_default="valgrind"
2267         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2268     ;;
2269     valgrind-memcheck)
2270         target_exec_default="valgrind"
2271         target_exec_args="--track-origins=yes --leak-check=full"
2272     ;;
2273     msvc)
2274         cc_default="c99wrap cl"
2275         ld_default="c99wrap link"
2276         nm_default="dumpbin -symbols"
2277         ar_default="lib"
2278         target_os_default="win32"
2279     ;;
2280     icl)
2281         cc_default="c99wrap -noconv icl"
2282         ld_default="c99wrap xilink"
2283         nm_default="dumpbin -symbols"
2284         ar_default="xilib"
2285         target_os_default="win32"
2286     ;;
2287     gcov)
2288         add_cflags  -fprofile-arcs -ftest-coverage
2289         add_ldflags -fprofile-arcs -ftest-coverage
2290     ;;
2291     ?*)
2292         die "Unknown toolchain $toolchain"
2293     ;;
2294 esac
2295
2296 set_default arch cc pkg_config sysinclude target_exec target_os
2297 enabled cross_compile || host_cc_default=$cc
2298 set_default host_cc
2299
2300 if ! $pkg_config --version >/dev/null 2>&1; then
2301     warn "$pkg_config not found, library detection may fail."
2302     pkg_config=false
2303 fi
2304
2305 exesuf() {
2306     case $1 in
2307         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2308     esac
2309 }
2310
2311 EXESUF=$(exesuf $target_os)
2312 HOSTEXESUF=$(exesuf $host_os)
2313
2314 # set temporary file name
2315 : ${TMPDIR:=$TEMPDIR}
2316 : ${TMPDIR:=$TMP}
2317 : ${TMPDIR:=/tmp}
2318
2319 if ! check_cmd mktemp -u XXXXXX; then
2320     # simple replacement for missing mktemp
2321     # NOT SAFE FOR GENERAL USE
2322     mktemp(){
2323         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2324     }
2325 fi
2326
2327 tmpfile(){
2328     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2329         (set -C; exec > $tmp) 2>/dev/null ||
2330         die "Unable to create temporary file in $TMPDIR."
2331     append TMPFILES $tmp
2332     eval $1=$tmp
2333 }
2334
2335 trap 'rm -f -- $TMPFILES' EXIT
2336
2337 tmpfile TMPASM .asm
2338 tmpfile TMPC   .c
2339 tmpfile TMPE   $EXESUF
2340 tmpfile TMPH   .h
2341 tmpfile TMPO   .o
2342 tmpfile TMPS   .S
2343 tmpfile TMPSH  .sh
2344 tmpfile TMPV   .ver
2345
2346 unset -f mktemp
2347
2348 chmod +x $TMPE
2349
2350 # make sure we can execute files in $TMPDIR
2351 cat > $TMPSH 2>> $logfile <<EOF
2352 #! /bin/sh
2353 EOF
2354 chmod +x $TMPSH >> $logfile 2>&1
2355 if ! $TMPSH >> $logfile 2>&1; then
2356     cat <<EOF
2357 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2358 variable to another directory and make sure that it is not mounted noexec.
2359 EOF
2360     die "Sanity test failed."
2361 fi
2362
2363 ccc_flags(){
2364     for flag; do
2365         case $flag in
2366             -std=c99)           echo -c99                       ;;
2367             -mcpu=*)            echo -arch ${flag#*=}           ;;
2368             -mieee)             echo -ieee                      ;;
2369             -O*|-fast)          echo $flag                      ;;
2370             -fno-math-errno)    echo -assume nomath_errno       ;;
2371             -g)                 echo -g3                        ;;
2372             -Wall)              echo -msg_enable level2         ;;
2373             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2374             -Wl,*)              echo $flag                      ;;
2375             -f*|-W*)                                            ;;
2376             *)                  echo $flag                      ;;
2377         esac
2378    done
2379 }
2380
2381 cparser_flags(){
2382     for flag; do
2383         case $flag in
2384             -Wno-switch)             echo -Wno-switch-enum ;;
2385             -Wno-format-zero-length) ;;
2386             -Wdisabled-optimization) ;;
2387             -Wno-pointer-sign)       echo -Wno-other ;;
2388             *)                       echo $flag ;;
2389         esac
2390     done
2391 }
2392
2393 msvc_common_flags(){
2394     for flag; do
2395         case $flag in
2396             # In addition to specifying certain flags under the compiler
2397             # specific filters, they must be specified here as well or else the
2398             # generic catch all at the bottom will print the original flag.
2399             -Wall)                ;;
2400             -std=c99)             ;;
2401             # Common flags
2402             -fomit-frame-pointer) ;;
2403             -g)                   echo -Z7 ;;
2404             -fno-math-errno)      ;;
2405             -fno-common)          ;;
2406             -fno-signed-zeros)    ;;
2407             -fPIC)                ;;
2408             -mthumb)              ;;
2409             -march=*)             ;;
2410             -lz)                  echo zlib.lib ;;
2411             -lavifil32)           echo vfw32.lib ;;
2412             -lavicap32)           echo vfw32.lib user32.lib ;;
2413             -l*)                  echo ${flag#-l}.lib ;;
2414             *)                    echo $flag ;;
2415         esac
2416     done
2417 }
2418
2419 msvc_flags(){
2420     msvc_common_flags "$@"
2421     for flag; do
2422         case $flag in
2423             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2424                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2425                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2426                                        -wd4273 ;;
2427         esac
2428     done
2429 }
2430
2431 icl_flags(){
2432     msvc_common_flags "$@"
2433     for flag; do
2434         case $flag in
2435             # Despite what Intel's documentation says -Wall, which is supported
2436             # on Windows, does enable remarks so disable them here.
2437             -Wall)                echo $flag -Qdiag-disable:remark ;;
2438             -std=c99)             echo -Qstd=c99 ;;
2439         esac
2440     done
2441 }
2442
2443 pgi_flags(){
2444     for flag; do
2445         case $flag in
2446             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2447             -fomit-frame-pointer) echo -Mnoframe ;;
2448             -g)                   echo -gopt ;;
2449             *)                    echo $flag ;;
2450         esac
2451     done
2452 }
2453
2454 suncc_flags(){
2455     for flag; do
2456         case $flag in
2457             -march=*|-mcpu=*)
2458                 case "${flag#*=}" in
2459                     native)                   echo -xtarget=native       ;;
2460                     v9|niagara)               echo -xarch=sparc          ;;
2461                     ultrasparc)               echo -xarch=sparcvis       ;;
2462                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2463                     i586|pentium)             echo -xchip=pentium        ;;
2464                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2465                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2466                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2467                     pentium4*)          echo -xtarget=pentium4           ;;
2468                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2469                     *-sse3)             echo -xarch=sse3                 ;;
2470                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2471                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2472                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2473                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2474                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2475                     k8|opteron|athlon64|athlon-fx)
2476                                                echo -xarch=sse2a         ;;
2477                     athlon*)                   echo -xarch=pentium_proa  ;;
2478                 esac
2479                 ;;
2480             -std=c99)             echo -xc99              ;;
2481             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2482             -fPIC)                echo -KPIC -xcode=pic32 ;;
2483             -W*,*)                echo $flag              ;;
2484             -f*-*|-W*|-mimpure-text)                      ;;
2485             -shared)              echo -G                 ;;
2486             *)                    echo $flag              ;;
2487         esac
2488     done
2489 }
2490
2491 tms470_flags(){
2492     for flag; do
2493         case $flag in
2494             -march=*|-mcpu=*)
2495                 case "${flag#*=}" in
2496                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2497                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2498                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2499                     armv6*|arm11*)          echo -mv=6   ;;
2500                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2501                                             echo -mv=5e  ;;
2502                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2503                 esac
2504                 ;;
2505             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2506             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2507             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2508             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2509             -msoft-float)   echo --float_support=vfplib       ;;
2510             -O[0-3]|-mf=*)  echo $flag                        ;;
2511             -g)             echo -g -mn                       ;;
2512             -pds=*)         echo $flag                        ;;
2513             -D*|-I*)        echo $flag                        ;;
2514             --gcc|--abi=*)  echo $flag                        ;;
2515             -me)            echo $flag                        ;;
2516         esac
2517     done
2518 }
2519
2520 probe_cc(){
2521     pfx=$1
2522     _cc=$2
2523
2524     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2525     unset _ld_o _ldflags _ld_lib _ld_path
2526     unset _depflags _DEPCMD _DEPFLAGS
2527     _flags_filter=echo
2528
2529     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2530         _type=llvm_gcc
2531         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
2532         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
2533         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2534         _cflags_speed='-O3'
2535         _cflags_size='-Os'
2536     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2537         _type=gcc
2538         gcc_version=$($_cc --version | head -n1)
2539         gcc_basever=$($_cc -dumpversion)
2540         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2541         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2542         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2543         if ! $_cc -dumpversion | grep -q '^2\.'; then
2544             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2545         fi
2546         _cflags_speed='-O3'
2547         _cflags_size='-Os'
2548     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2549         _type=icc
2550         _ident=$($_cc --version | head -n1)
2551         _depflags='-MMD'
2552         _cflags_speed='-O3'
2553         _cflags_size='-Os'
2554         _cflags_noopt='-O1'
2555     elif $_cc -v 2>&1 | grep -q xlc; then
2556         _type=xlc
2557         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2558         _cflags_speed='-O5'
2559         _cflags_size='-O5 -qcompact'
2560     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2561         _type=ccc
2562         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2563         _DEPFLAGS='-M'
2564         _cflags_speed='-fast'
2565         _cflags_size='-O1'
2566         _flags_filter=ccc_flags
2567     elif $_cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
2568         test -d "$sysroot" || die "No valid sysroot specified."
2569         _type=armcc
2570         _ident=$($_cc --vsn | head -n1)
2571         armcc_conf="$PWD/armcc.conf"
2572         $_cc --arm_linux_configure                 \
2573              --arm_linux_config_file="$armcc_conf" \
2574              --configure_sysroot="$sysroot"        \
2575              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
2576              die "Error creating armcc configuration file."
2577         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
2578         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
2579         as_default="${cross_prefix}gcc"
2580         _depflags='-MMD'
2581         _cflags_speed='-O3'
2582         _cflags_size='-Os'
2583     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
2584         _type=tms470
2585         _ident=$($_cc -version | head -n1 | tr -s ' ')
2586         _flags='--gcc --abi=eabi -me'
2587         _cc_e='-ppl -fe=$@'
2588         _cc_o='-fe=$@'
2589         _depflags='-ppa -ppd=$(@:.o=.d)'
2590         _cflags_speed='-O3 -mf=5'
2591         _cflags_size='-O3 -mf=2'
2592         _flags_filter=tms470_flags
2593     elif $_cc -v 2>&1 | grep -q clang; then
2594         _type=clang
2595         _ident=$($_cc --version | head -n1)
2596         _depflags='-MMD'
2597         _cflags_speed='-O3'
2598         _cflags_size='-Os'
2599     elif $_cc -V 2>&1 | grep -q Sun; then
2600         _type=suncc
2601         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
2602         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
2603         _DEPFLAGS='-xM1 -xc99'
2604         _ldflags='-std=c99'
2605         _cflags_speed='-O5'
2606         _cflags_size='-O5 -xspace'
2607         _flags_filter=suncc_flags
2608     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
2609         _type=pathscale
2610         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2611         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2612         _cflags_speed='-O2'
2613         _cflags_size='-Os'
2614         _flags_filter='filter_out -Wdisabled-optimization'
2615     elif $_cc -v 2>&1 | grep -q Open64; then
2616         _type=open64
2617         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2618         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2619         _cflags_speed='-O2'
2620         _cflags_size='-Os'
2621         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
2622     elif $_cc -V 2>&1 | grep -q Portland; then
2623         _type=pgi
2624         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
2625         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
2626         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
2627         _cflags_size="-O2 -Munroll=c:1 $opt_common"
2628         _cflags_noopt="-O1"
2629         _flags_filter=pgi_flags
2630     elif $_cc 2>&1 | grep -q Microsoft; then
2631         _type=msvc
2632         _ident=$($cc 2>&1 | head -n1)
2633         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
2634         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
2635         _cflags_speed="-O2"
2636         _cflags_size="-O1"
2637         # Nonstandard output options, to avoid msys path conversion issues.
2638         # Relies on wrapper to remap it.
2639         if $_cc 2>&1 | grep -q Linker; then
2640             _ld_o='-out $@'
2641         else
2642             _ld_o='-Fe$@'
2643         fi
2644         _cc_o='-Fo $@'
2645         _cc_e='-P -Fi $@'
2646         _flags_filter=msvc_flags
2647         _ld_lib='lib%.a'
2648         _ld_path='-libpath:'
2649         _flags='-nologo'
2650         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
2651         if [ $pfx = hostcc ]; then
2652             append _cflags -Dsnprintf=_snprintf
2653         fi
2654     elif $_cc 2>&1 | grep -q Intel; then
2655         _type=icl
2656         _ident=$($cc 2>&1 | head -n1)
2657         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
2658         # Not only is O3 broken on 13.x+ but it is slower on all previous
2659         # versions (tested) as well.
2660         _cflags_speed="-O2"
2661         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
2662         # Nonstandard output options, to avoid msys path conversion issues.
2663         # Relies on wrapper to remap it.
2664         if $_cc 2>&1 | grep -q Linker; then
2665             _ld_o='-out $@'
2666         else
2667             _ld_o='-Fe$@'
2668         fi
2669         _cc_o='-Fo $@'
2670         _cc_e='-P'
2671         _flags_filter=icl_flags
2672         _ld_lib='lib%.a'
2673         _ld_path='-libpath:'
2674         # -Qdiag-error to make icl error when seeing certain unknown arguments
2675         _flags='-nologo -Qdiag-error:4044,10157'
2676         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
2677         # with MSVC which enables it by default.
2678         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
2679         if [ $pfx = hostcc ]; then
2680             append _cflags -Dsnprintf=_snprintf
2681         fi
2682     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
2683         _type=cparser
2684         _ident=$($_cc --version | head -n1)
2685         _depflags='-MMD'
2686         _cflags_speed='-O4'
2687         _cflags_size='-O2'
2688         _flags_filter=cparser_flags
2689     fi
2690
2691     eval ${pfx}_type=\$_type
2692     eval ${pfx}_ident=\$_ident
2693 }
2694
2695 set_ccvars(){
2696     eval ${1}_C=\${_cc_c-\${${1}_C}}
2697     eval ${1}_E=\${_cc_e-\${${1}_E}}
2698     eval ${1}_O=\${_cc_o-\${${1}_O}}
2699
2700     if [ -n "$_depflags" ]; then
2701         eval ${1}_DEPFLAGS=\$_depflags
2702     else
2703         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
2704         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
2705         eval DEP${1}FLAGS=\$_flags
2706     fi
2707 }
2708
2709 probe_cc cc "$cc"
2710 cflags_filter=$_flags_filter
2711 cflags_speed=$_cflags_speed
2712 cflags_size=$_cflags_size
2713 cflags_noopt=$_cflags_noopt
2714 add_cflags $_flags $_cflags
2715 cc_ldflags=$_ldflags
2716 set_ccvars CC
2717
2718 probe_cc hostcc "$host_cc"
2719 host_cflags_filter=$_flags_filter
2720 add_host_cflags  $_flags $_cflags
2721 set_ccvars HOSTCC
2722
2723 test -n "$cc_type" && enable $cc_type ||
2724     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
2725
2726 : ${as_default:=$cc}
2727 : ${dep_cc_default:=$cc}
2728 : ${ld_default:=$cc}
2729 : ${host_ld_default:=$host_cc}
2730 set_default ar as dep_cc ld host_ld
2731
2732 probe_cc as "$as"
2733 asflags_filter=$_flags_filter
2734 add_asflags $_flags $_cflags
2735 set_ccvars AS
2736
2737 probe_cc ld "$ld"
2738 ldflags_filter=$_flags_filter
2739 add_ldflags $_flags $_ldflags
2740 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
2741 LD_O=${_ld_o-$LD_O}
2742 LD_LIB=${_ld_lib-$LD_LIB}
2743 LD_PATH=${_ld_path-$LD_PATH}
2744
2745 probe_cc hostld "$host_ld"
2746 host_ldflags_filter=$_flags_filter
2747 add_host_ldflags $_flags $_ldflags
2748 HOSTLD_O=${_ld_o-$HOSTLD_O}
2749
2750 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
2751     probe_cc depcc "$dep_cc"
2752     CCDEP=${_DEPCMD:-$DEPCMD}
2753     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
2754     DEPCCFLAGS=$_flags
2755 fi
2756
2757 if $ar 2>&1 | grep -q Microsoft; then
2758     arflags="-nologo"
2759     ar_o='-out:$@'
2760 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
2761     arflags="rq"
2762     ar_o='$@'
2763 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
2764     arflags='-Xany -r -c'
2765     ar_o='$@'
2766 else
2767     arflags="rc"
2768     ar_o='$@'
2769 fi
2770
2771 add_cflags $extra_cflags
2772 add_asflags $extra_cflags
2773
2774 if test -n "$sysroot"; then
2775     case "$cc_type" in
2776         gcc|llvm_gcc|clang)
2777             add_cppflags --sysroot="$sysroot"
2778             add_ldflags --sysroot="$sysroot"
2779         ;;
2780         tms470)
2781             add_cppflags -I"$sysinclude"
2782             add_ldflags  --sysroot="$sysroot"
2783         ;;
2784     esac
2785 fi
2786
2787 if test "$cpu" = host; then
2788     enabled cross_compile &&
2789         die "--cpu=host makes no sense when cross-compiling."
2790
2791     case "$cc_type" in
2792         gcc|llvm_gcc)
2793             check_native(){
2794                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
2795                 sed -n "/cc1.*$1=/{
2796                             s/.*$1=\\([^ ]*\\).*/\\1/
2797                             p
2798                             q
2799                         }" $TMPE
2800             }
2801             cpu=$(check_native -march || check_native -mcpu)
2802         ;;
2803     esac
2804
2805     test "${cpu:-host}" = host &&
2806         die "--cpu=host not supported with compiler $cc"
2807 fi
2808
2809 # Deal with common $arch aliases
2810 case "$arch" in
2811     aarch64|arm64)
2812         arch="aarch64"
2813     ;;
2814     arm*)
2815         arch="arm"
2816     ;;
2817     mips*|IP*)
2818         arch="mips"
2819     ;;
2820     parisc*|hppa*)
2821         arch="parisc"
2822     ;;
2823     "Power Macintosh"|ppc*|powerpc*)
2824         arch="ppc"
2825     ;;
2826     s390|s390x)
2827         arch="s390"
2828     ;;
2829     sh4|sh)
2830         arch="sh4"
2831     ;;
2832     sun4u|sparc*)
2833         arch="sparc"
2834     ;;
2835     tilegx|tile-gx)
2836         arch="tilegx"
2837     ;;
2838     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
2839         arch="x86"
2840     ;;
2841 esac
2842
2843 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
2844 enable $arch
2845
2846 # Add processor-specific flags
2847 if enabled aarch64; then
2848
2849     case $cpu in
2850         armv*)
2851             cpuflags="-march=$cpu"
2852         ;;
2853         *)
2854             cpuflags="-mcpu=$cpu"
2855         ;;
2856     esac
2857
2858 elif enabled alpha; then
2859
2860     cpuflags="-mcpu=$cpu"
2861
2862 elif enabled arm; then
2863
2864     check_arm_arch() {
2865         check_cpp_condition stddef.h \
2866             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
2867             $cpuflags
2868     }
2869
2870     probe_arm_arch() {
2871         if   check_arm_arch 4;        then echo armv4;
2872         elif check_arm_arch 4T;       then echo armv4t;
2873         elif check_arm_arch 5;        then echo armv5;
2874         elif check_arm_arch 5E;       then echo armv5e;
2875         elif check_arm_arch 5T;       then echo armv5t;
2876         elif check_arm_arch 5TE;      then echo armv5te;
2877         elif check_arm_arch 5TEJ;     then echo armv5te;
2878         elif check_arm_arch 6;        then echo armv6;
2879         elif check_arm_arch 6J;       then echo armv6j;
2880         elif check_arm_arch 6K;       then echo armv6k;
2881         elif check_arm_arch 6Z;       then echo armv6z;
2882         elif check_arm_arch 6ZK;      then echo armv6zk;
2883         elif check_arm_arch 6T2;      then echo armv6t2;
2884         elif check_arm_arch 7;        then echo armv7;
2885         elif check_arm_arch 7A  7_A;  then echo armv7-a;
2886         elif check_arm_arch 7R  7_R;  then echo armv7-r;
2887         elif check_arm_arch 7M  7_M;  then echo armv7-m;
2888         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
2889         elif check_arm_arch 8A  8_A;  then echo armv8-a;
2890         fi
2891     }
2892
2893     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
2894
2895     case $cpu in
2896         armv*)
2897             cpuflags="-march=$cpu"
2898             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
2899         ;;
2900         *)
2901             cpuflags="-mcpu=$cpu"
2902             case $cpu in
2903                 cortex-a*)                               subarch=armv7a  ;;
2904                 cortex-r*)                               subarch=armv7r  ;;
2905                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
2906                 arm11*)                                  subarch=armv6   ;;
2907                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
2908                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
2909                 *)                             subarch=$(probe_arm_arch) ;;
2910             esac
2911         ;;
2912     esac
2913
2914     case "$subarch" in
2915         armv5t*)    enable fast_clz                ;;
2916         armv[6-8]*) enable fast_clz fast_unaligned ;;
2917     esac
2918
2919 elif enabled avr32; then
2920
2921     case $cpu in
2922         ap7[02]0[0-2])
2923             subarch="avr32_ap"
2924             cpuflags="-mpart=$cpu"
2925         ;;
2926         ap)
2927             subarch="avr32_ap"
2928             cpuflags="-march=$cpu"
2929         ;;
2930         uc3[ab]*)
2931             subarch="avr32_uc"
2932             cpuflags="-mcpu=$cpu"
2933         ;;
2934         uc)
2935             subarch="avr32_uc"
2936             cpuflags="-march=$cpu"
2937         ;;
2938     esac
2939
2940 elif enabled bfin; then
2941
2942     cpuflags="-mcpu=$cpu"
2943
2944 elif enabled mips; then
2945
2946     cpuflags="-march=$cpu"
2947
2948 elif enabled ppc; then
2949
2950     case $(tolower $cpu) in
2951         601|ppc601|powerpc601)
2952             cpuflags="-mcpu=601"
2953             disable altivec
2954         ;;
2955         603*|ppc603*|powerpc603*)
2956             cpuflags="-mcpu=603"
2957             disable altivec
2958         ;;
2959         604*|ppc604*|powerpc604*)
2960             cpuflags="-mcpu=604"
2961             disable altivec
2962         ;;
2963         g3|75*|ppc75*|powerpc75*)
2964             cpuflags="-mcpu=750"
2965             disable altivec
2966         ;;
2967         g4|745*|ppc745*|powerpc745*)
2968             cpuflags="-mcpu=7450"
2969         ;;
2970         74*|ppc74*|powerpc74*)
2971             cpuflags="-mcpu=7400"
2972         ;;
2973         g5|970|ppc970|powerpc970)
2974             cpuflags="-mcpu=970"
2975         ;;
2976         power[3-7]*)
2977             cpuflags="-mcpu=$cpu"
2978         ;;
2979         cell)
2980             cpuflags="-mcpu=cell"
2981             enable ldbrx
2982         ;;
2983         e500mc)
2984             cpuflags="-mcpu=e500mc"
2985             disable altivec
2986         ;;
2987         e500v2)
2988             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
2989             disable altivec
2990         ;;
2991         e500)
2992             cpuflags="-mcpu=8540 -mhard-float"
2993             disable altivec
2994         ;;
2995     esac
2996
2997 elif enabled sparc; then
2998
2999     case $cpu in
3000         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3001             cpuflags="-mcpu=$cpu"
3002             disable vis
3003         ;;
3004         ultrasparc*|niagara[234])
3005             cpuflags="-mcpu=$cpu"
3006         ;;
3007     esac
3008
3009 elif enabled x86; then
3010
3011     case $cpu in
3012         i[345]86|pentium)
3013             cpuflags="-march=$cpu"
3014             disable mmx
3015         ;;
3016         # targets that do NOT support nopl and conditional mov (cmov)
3017         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3018             cpuflags="-march=$cpu"
3019             disable i686
3020         ;;
3021         # targets that do support nopl and conditional mov (cmov)
3022         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3023             cpuflags="-march=$cpu"
3024             enable i686
3025             enable fast_cmov
3026         ;;
3027         # targets that do support conditional mov but on which it's slow
3028         pentium4|pentium4m|prescott|nocona)
3029             cpuflags="-march=$cpu"
3030             enable i686
3031             disable fast_cmov
3032         ;;
3033     esac
3034
3035 fi
3036
3037 if [ "$cpu" != generic ]; then
3038     add_cflags  $cpuflags
3039     add_asflags $cpuflags
3040 fi
3041
3042 # compiler sanity check
3043 check_exec <<EOF
3044 int main(void){ return 0; }
3045 EOF
3046 if test "$?" != 0; then
3047     echo "$cc is unable to create an executable file."
3048     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3049         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3050         echo "Only do this if you know what cross compiling means."
3051     fi
3052     die "C compiler test failed."
3053 fi
3054
3055 add_cppflags -D_ISOC99_SOURCE
3056 check_cflags -std=c99
3057 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3058 #include <stdlib.h>
3059 EOF
3060 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3061 #include <stdlib.h>
3062 EOF
3063
3064 check_host_cflags -std=c99
3065 check_host_cflags -Wall
3066
3067 check_64bit(){
3068     arch32=$1
3069     arch64=$2
3070     expr=$3
3071     check_code cc "" "int test[2*($expr) - 1]" &&
3072         subarch=$arch64 || subarch=$arch32
3073 }
3074
3075 case "$arch" in
3076     aarch64|alpha|ia64)
3077         spic=$shared
3078     ;;
3079     mips)
3080         check_64bit mips mips64 '_MIPS_SIM > 1'
3081         spic=$shared
3082     ;;
3083     parisc)
3084         check_64bit parisc parisc64 'sizeof(void *) > 4'
3085         spic=$shared
3086     ;;
3087     ppc)
3088         check_64bit ppc ppc64 'sizeof(void *) > 4'
3089         spic=$shared
3090     ;;
3091     sparc)
3092         check_64bit sparc sparc64 'sizeof(void *) > 4'
3093         spic=$shared
3094     ;;
3095     x86)
3096         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3097         if test "$subarch" = "x86_64"; then
3098             spic=$shared
3099         fi
3100     ;;
3101 esac
3102
3103 enable $subarch
3104 enabled spic && enable_weak pic
3105
3106 # OS specific
3107 case $target_os in
3108     aix)
3109         SHFLAGS=-shared
3110         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3111         enabled shared && add_ldflags -Wl,-brtl
3112         ;;
3113     haiku)
3114         prefix_default="/boot/common"
3115         network_extralibs="-lnetwork"
3116         host_libs=
3117         ;;
3118     sunos)
3119         SHFLAGS='-shared -Wl,-h,$$(@F)'
3120         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3121         network_extralibs="-lsocket -lnsl"
3122         add_cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3123         # When using suncc to build, the Solaris linker will mark
3124         # an executable with each instruction set encountered by
3125         # the Solaris assembler.  As our libraries contain their own
3126         # guards for processor-specific code, instead suppress
3127         # generation of the HWCAPS ELF section on Solaris x86 only.
3128         enabled_all suncc x86 &&
3129             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3130             add_ldflags -Wl,-M,mapfile
3131         nm_default='nm -P -g'
3132         ;;
3133     netbsd)
3134         disable symver
3135         oss_indev_extralibs="-lossaudio"
3136         oss_outdev_extralibs="-lossaudio"
3137         ;;
3138     openbsd|bitrig)
3139         disable symver
3140         SHFLAGS='-shared'
3141         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3142         SLIB_INSTALL_LINKS=
3143         oss_indev_extralibs="-lossaudio"
3144         oss_outdev_extralibs="-lossaudio"
3145         ;;
3146     dragonfly)
3147         disable symver
3148         ;;
3149     freebsd)
3150         ;;
3151     bsd/os)
3152         add_extralibs -lpoll -lgnugetopt
3153         ;;
3154     darwin)
3155         gas="gas-preprocessor.pl $cc"
3156         enabled ppc && add_asflags -force_cpusubtype_ALL
3157         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3158         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3159         add_ldflags -Wl,-dynamic,-search_paths_first
3160         SLIBSUF=".dylib"
3161         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3162         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3163         objformat="macho"
3164         enabled x86_64 && objformat="macho64"
3165         enabled_any pic shared ||
3166             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3167         ;;
3168     mingw32*)
3169         if test $target_os = "mingw32ce"; then
3170             disable network
3171         else
3172             target_os=mingw32
3173         fi
3174         LIBTARGET=i386
3175         if enabled x86_64; then
3176             LIBTARGET="i386:x86-64"
3177         elif enabled arm; then
3178             LIBTARGET=arm-wince
3179         fi
3180         check_ldflags -Wl,--nxcompat
3181         check_ldflags -Wl,--dynamicbase
3182         shlibdir_default="$bindir_default"
3183         SLIBPREF=""
3184         SLIBSUF=".dll"
3185         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3186         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3187         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3188         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3189         SLIB_INSTALL_LINKS=
3190         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3191         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3192         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3193         objformat="win32"
3194         dlltool="${cross_prefix}dlltool"
3195         ranlib=:
3196         enable dos_paths
3197         ;;
3198     win32|win64)
3199         if enabled shared; then
3200             # Link to the import library instead of the normal static library
3201             # for shared libs.
3202             LD_LIB='%.lib'
3203             # Cannot build both shared and static libs with MSVC or icl.
3204             disable static
3205         fi
3206         shlibdir_default="$bindir_default"
3207         SLIBPREF=""
3208         SLIBSUF=".dll"
3209         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3210         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3211         SLIB_CREATE_DEF_CMD='makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3212         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3213         SLIB_INSTALL_LINKS=
3214         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3215         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3216         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3217         objformat="win32"
3218         ranlib=:
3219         enable dos_paths
3220         ;;
3221     cygwin*)
3222         target_os=cygwin
3223         shlibdir_default="$bindir_default"
3224         SLIBPREF="cyg"
3225         SLIBSUF=".dll"
3226         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3227         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3228         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3229         SLIB_INSTALL_LINKS=
3230         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3231         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3232         objformat="win32"
3233         enable dos_paths
3234         ;;
3235     *-dos|freedos|opendos)
3236         network_extralibs="-lsocket"
3237         objformat="coff"
3238         enable dos_paths
3239         add_cppflags -U__STRICT_ANSI__
3240         ;;
3241     linux)
3242         enable dv1394
3243         ;;
3244     irix*)
3245         target_os=irix
3246         ranlib="echo ignoring ranlib"
3247         ;;
3248     os/2*)
3249         ln_s="cp -f"
3250         objformat="aout"
3251         add_cppflags -D_GNU_SOURCE
3252         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3253         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3254         LIBSUF="_s.a"
3255         SLIBPREF=""
3256         SLIBSUF=".dll"
3257         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3258         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3259         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3260             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3261             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3262             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3263             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3264             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3265         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3266             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3267         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3268         enable dos_paths
3269         ;;
3270     gnu/kfreebsd)
3271         add_cppflags -D_BSD_SOURCE
3272         ;;
3273     gnu)
3274         ;;
3275     qnx)
3276         add_cppflags -D_QNX_SOURCE
3277         network_extralibs="-lsocket"
3278         ;;
3279     symbian)
3280         SLIBSUF=".dll"
3281         enable dos_paths
3282         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3283         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3284         add_ldflags -Wl,--target1-abs,--no-undefined \
3285                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3286                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3287         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3288                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3289                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3290         ;;
3291     osf1)
3292         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3293         ;;
3294     minix)
3295         ;;
3296     plan9)
3297         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3298                      -D_REENTRANT_SOURCE        \
3299                      -D_RESEARCH_SOURCE         \
3300                      -DFD_SETSIZE=96            \
3301                      -DHAVE_SOCK_OPTS
3302         add_compat strtod.o strtod=avpriv_strtod
3303         network_extralibs='-lbsd'
3304         exeobjs=compat/plan9/main.o
3305         disable avserver
3306         cp_f='cp'
3307         ;;
3308     none)
3309         ;;
3310     *)
3311         die "Unknown OS '$target_os'."
3312         ;;
3313 esac
3314
3315 # determine libc flavour
3316
3317 # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3318 if check_cpp_condition features.h "defined __UCLIBC__"; then
3319     libc_type=uclibc
3320     add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3321 elif check_cpp_condition features.h "defined __GLIBC__"; then
3322     libc_type=glibc
3323     add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3324 # MinGW headers can be installed on Cygwin, so check for newlib first.
3325 elif check_cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3326     libc_type=newlib
3327     add_cppflags -U__STRICT_ANSI__
3328 elif check_header _mingw.h; then
3329     libc_type=mingw
3330     check_cpp_condition _mingw.h \
3331         "defined (__MINGW64_VERSION_MAJOR) || (__MINGW32_MAJOR_VERSION > 3) || \
3332             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3333         die "ERROR: MinGW runtime version must be >= 3.15."
3334     add_cppflags -U__STRICT_ANSI__
3335 elif check_func_headers stdlib.h _get_doserrno; then
3336     libc_type=msvcrt
3337     add_compat strtod.o strtod=avpriv_strtod
3338     add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3339                                  _snprintf=avpriv_snprintf  \
3340                                  vsnprintf=avpriv_vsnprintf
3341     # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3342     # 0x601 by default unless something else is set by the user.
3343     # This can easily lead to us detecting functions only present
3344     # in such new versions and producing binaries requiring windows 7.0.
3345     # Therefore explicitly set the default to XP unless the user has
3346     # set something else on the command line.
3347     check_cpp_condition stdlib.h "defined(_WIN32_WINNT)" || add_cppflags -D_WIN32_WINNT=0x0502
3348 elif check_cpp_condition stddef.h "defined __KLIBC__"; then
3349     libc_type=klibc
3350 elif check_cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3351     libc_type=bionic
3352     add_compat strtod.o strtod=avpriv_strtod
3353 fi
3354
3355 test -n "$libc_type" && enable $libc_type
3356
3357 # hacks for compiler/libc/os combinations
3358
3359 if enabled_all tms470 glibc; then
3360     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3361     add_cppflags -D__USER_LABEL_PREFIX__=
3362     add_cppflags -D__builtin_memset=memset
3363     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3364     add_cflags   -pds=48    # incompatible redefinition of macro
3365 fi
3366
3367 if enabled_all ccc glibc; then
3368     add_ldflags -Wl,-z,now  # calls to libots crash without this
3369 fi
3370
3371 esc(){
3372     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3373 }
3374
3375 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3376
3377 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3378
3379 set_default $PATHS_LIST
3380 set_default nm
3381
3382 # we need to build at least one lib type
3383 if ! enabled_any static shared; then
3384     cat <<EOF
3385 At least one library type must be built.
3386 Specify --enable-static to build the static libraries or --enable-shared to
3387 build the shared libraries as well. To only build the shared libraries specify
3388 --disable-static in addition to --enable-shared.
3389 EOF
3390     exit 1;
3391 fi
3392
3393 die_license_disabled() {
3394     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3395 }
3396
3397 die_license_disabled gpl libcdio
3398 die_license_disabled gpl libx264
3399 die_license_disabled gpl libxavs
3400 die_license_disabled gpl libxvid
3401 die_license_disabled gpl x11grab
3402
3403 die_license_disabled nonfree libfaac
3404 die_license_disabled nonfree libfdk_aac
3405 die_license_disabled nonfree openssl
3406
3407 die_license_disabled version3 libopencore_amrnb
3408 die_license_disabled version3 libopencore_amrwb
3409 die_license_disabled version3 libvo_aacenc
3410 die_license_disabled version3 libvo_amrwbenc
3411
3412 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3413
3414 disabled optimizations || check_cflags -fomit-frame-pointer
3415
3416 enable_weak_pic() {
3417     disabled pic && return
3418     enable pic
3419     add_cppflags -DPIC
3420     case "$target_os" in
3421     mingw*|cygwin*)
3422         ;;
3423     *)
3424         add_cflags -fPIC
3425         ;;
3426     esac
3427     add_asflags  -fPIC
3428 }
3429
3430 enabled pic && enable_weak_pic
3431
3432 check_cc <<EOF || die "Symbol mangling check failed."
3433 int ff_extern;
3434 EOF
3435 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3436 extern_prefix=${sym%%ff_extern*}
3437
3438 check_cc <<EOF && enable_weak inline_asm
3439 void foo(void) { __asm__ volatile ("" ::); }
3440 EOF
3441
3442 _restrict=
3443 for restrict_keyword in restrict __restrict__ __restrict; do
3444     check_cc <<EOF && _restrict=$restrict_keyword && break
3445 void foo(char * $restrict_keyword p);
3446 EOF
3447 done
3448
3449 check_cc <<EOF && enable pragma_deprecated
3450 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3451 EOF
3452
3453 check_cc <<EOF && enable attribute_packed
3454 struct { int x; } __attribute__((packed)) x;
3455 EOF
3456
3457 check_cc <<EOF && enable attribute_may_alias
3458 union { int x; } __attribute__((may_alias)) x;
3459 EOF
3460
3461 check_cc <<EOF || die "endian test failed"
3462 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3463 EOF
3464 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3465
3466 check_inline_asm inline_asm_labels '"1:\n"'
3467
3468 if enabled alpha; then
3469
3470     check_cflags -mieee
3471
3472 elif enabled arm; then
3473
3474     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
3475     enabled thumb && check_cflags -mthumb || check_cflags -marm
3476     nogas=die
3477
3478     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
3479         enable vfp_args
3480     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
3481         case "${cross_prefix:-$cc}" in
3482             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
3483             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
3484 __asm__ (".eabi_attribute 28, 1");
3485 int main(void) { return 0; }
3486 EOF
3487         esac
3488         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
3489     fi
3490
3491     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
3492     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
3493     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
3494     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
3495     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
3496     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
3497
3498     [ $target_os = linux ] ||
3499         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
3500             $ARCH_EXT_LIST_ARM
3501
3502     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
3503     check_inline_asm asm_mod_y '"vmul.i32 d0, d0, %y0" :: "x"(0)'
3504
3505     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
3506
3507 elif enabled mips; then
3508
3509     check_inline_asm loongson '"dmult.g $1, $2, $3"'
3510
3511 elif enabled parisc; then
3512
3513     if enabled gcc; then
3514         case $($cc -dumpversion) in
3515             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
3516         esac
3517     fi
3518
3519 elif enabled ppc; then
3520
3521     enable local_aligned_8 local_aligned_16
3522
3523     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
3524     check_inline_asm ibm_asm   '"add 0, 0, 0"'
3525     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
3526     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
3527
3528     # AltiVec flags: The FSF version of GCC differs from the Apple version
3529     if enabled altivec; then
3530         nogas=warn
3531         check_cflags -maltivec -mabi=altivec &&
3532         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
3533         check_cflags -faltivec
3534
3535         # check if our compiler supports Motorola AltiVec C API
3536         check_cc <<EOF || disable altivec
3537 $inc_altivec_h
3538 int main(void) {
3539     vector signed int v1 = (vector signed int) { 0 };
3540     vector signed int v2 = (vector signed int) { 1 };
3541     v1 = vec_add(v1, v2);
3542     return 0;
3543 }
3544 EOF
3545
3546         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
3547     fi
3548
3549 elif enabled sparc; then
3550
3551     enabled vis && check_inline_asm vis '"pdist %f0, %f0, %f0"'
3552
3553 elif enabled x86; then
3554
3555     check_builtin rdtsc    intrin.h   "__rdtsc()"
3556     check_builtin mm_empty mmintrin.h "_mm_empty()"
3557
3558     enable local_aligned_8 local_aligned_16
3559
3560     # check whether EBP is available on x86
3561     # As 'i' is stored on the stack, this program will crash
3562     # if the base pointer is used to access it because the
3563     # base pointer is cleared in the inline assembly code.
3564     check_exec_crash <<EOF && enable ebp_available
3565 volatile int i=0;
3566 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
3567 return i;
3568 EOF
3569
3570     # check whether EBX is available on x86
3571     check_inline_asm ebx_available '""::"b"(0)' &&
3572         check_inline_asm ebx_available '"":::"%ebx"'
3573
3574     # check whether xmm clobbers are supported
3575     check_inline_asm xmm_clobbers '"":::"%xmm0"'
3576
3577     # check whether binutils is new enough to compile SSSE3/MMXEXT
3578     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
3579     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
3580
3581     if ! disabled_any asm mmx yasm; then
3582         if check_cmd $yasmexe --version; then
3583             enabled x86_64 && yasm_extra="-m amd64"
3584             yasm_debug="-g dwarf2"
3585         elif check_cmd nasm -v; then
3586             yasmexe=nasm
3587             yasm_debug="-g -F dwarf"
3588             enabled x86_64 && test "$objformat" = elf && objformat=elf64
3589         fi
3590
3591         YASMFLAGS="-f $objformat $yasm_extra"
3592         enabled pic               && append YASMFLAGS "-DPIC"
3593         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
3594         case "$objformat" in
3595             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
3596         esac
3597
3598         check_yasm "movbe ecx, [5]" && enable yasm ||
3599             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
3600         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
3601         check_yasm "CPU amdnop" && enable cpunop
3602     fi
3603
3604     case "$cpu" in
3605         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
3606             disable fast_clz
3607         ;;
3608     esac
3609
3610 fi
3611
3612 if enabled asm; then
3613     as=${gas:=$as}
3614     check_as <<EOF && enable gnu_as || \
3615         $nogas "GNU assembler not found, install gas-preprocessor"
3616 .macro m n
3617 \n: .int 0
3618 .endm
3619 m x
3620 EOF
3621 fi
3622
3623 check_ldflags -Wl,--as-needed
3624
3625 if check_func dlopen; then
3626     ldl=
3627 elif check_func dlopen -ldl; then
3628     ldl=-ldl
3629 fi
3630
3631 if ! disabled network; then
3632     check_type "sys/types.h sys/socket.h" socklen_t
3633     check_type netdb.h "struct addrinfo"
3634     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
3635     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
3636     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
3637     check_type netinet/in.h "struct sockaddr_in6"
3638     check_type poll.h "struct pollfd"
3639     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
3640     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
3641     check_type netinet/sctp.h "struct sctp_event_subscribe"
3642     check_func getaddrinfo $network_extralibs
3643     check_func getservbyport $network_extralibs
3644     # Prefer arpa/inet.h over winsock2
3645     if check_header arpa/inet.h ; then
3646         check_func closesocket
3647     elif check_header winsock2.h ; then
3648         check_func_headers winsock2.h closesocket -lws2 &&
3649             network_extralibs="-lws2" ||
3650         { check_func_headers winsock2.h closesocket -lws2_32 &&
3651             network_extralibs="-lws2_32"; }
3652         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
3653         check_type ws2tcpip.h socklen_t
3654         check_type ws2tcpip.h "struct addrinfo"
3655         check_type ws2tcpip.h "struct group_source_req"
3656         check_type ws2tcpip.h "struct ip_mreq_source"
3657         check_type ws2tcpip.h "struct ipv6_mreq"
3658         check_type winsock2.h "struct pollfd"
3659         check_type ws2tcpip.h "struct sockaddr_in6"
3660         check_type ws2tcpip.h "struct sockaddr_storage"
3661         check_struct winsock2.h "struct sockaddr" sa_len
3662     else
3663         disable network
3664     fi
3665 fi
3666
3667 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
3668 check_func nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
3669
3670 check_func  fcntl
3671 check_func  fork
3672 check_func_headers stdlib.h getenv
3673 check_func  gethrtime
3674 check_func  getopt
3675 check_func  getrusage
3676 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
3677 check_func  gettimeofday
3678 check_func  inet_aton $network_extralibs
3679 check_func  isatty
3680 check_func  localtime_r
3681 check_func  ${malloc_prefix}memalign            && enable memalign
3682 check_func  mkstemp
3683 check_func  mmap
3684 check_func  mprotect
3685 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
3686 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
3687 check_func  setrlimit
3688 check_func  strerror_r
3689 check_func  strptime
3690 check_func  strtok_r
3691 check_func  sched_getaffinity
3692 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
3693 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
3694 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
3695 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
3696 check_func  sysconf
3697 check_func  sysctl
3698 check_func  usleep
3699 check_func_headers io.h setmode
3700 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
3701 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
3702 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
3703 check_func_headers windows.h GetProcessAffinityMask
3704 check_func_headers windows.h GetProcessTimes
3705 check_func_headers windows.h GetSystemTimeAsFileTime
3706 check_func_headers windows.h MapViewOfFile
3707 check_func_headers windows.h SetConsoleTextAttribute
3708 check_func_headers windows.h Sleep
3709 check_func_headers windows.h VirtualAlloc
3710
3711 check_header direct.h
3712 check_header dlfcn.h
3713 check_header dxva.h
3714 check_header dxva2api.h
3715 check_header io.h
3716 check_header malloc.h
3717 check_header poll.h
3718 check_header sys/mman.h
3719 check_header sys/param.h
3720 check_header sys/resource.h
3721 check_header sys/select.h
3722 check_header sys/time.h
3723 check_header sys/un.h
3724 check_header unistd.h
3725 check_header vdpau/vdpau.h
3726 check_header vdpau/vdpau_x11.h
3727 check_header VideoDecodeAcceleration/VDADecoder.h
3728 check_header windows.h
3729 check_header X11/extensions/XvMClib.h
3730
3731 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
3732 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
3733
3734 if ! disabled w32threads && ! enabled pthreads; then
3735     check_func_headers "windows.h process.h" _beginthreadex && enable w32threads
3736 fi
3737
3738 # check for some common methods of building with pthread support
3739 # do this before the optional library checks as some of them require pthreads
3740 if ! disabled pthreads && ! enabled w32threads; then
3741     enable pthreads
3742     if check_func pthread_create; then
3743         :
3744     elif check_func pthread_create -pthread; then
3745         add_cflags -pthread
3746         add_extralibs -pthread
3747     elif check_func pthread_create -pthreads; then
3748         add_cflags -pthreads
3749         add_extralibs -pthreads
3750     elif check_func pthread_create -lpthreadGC2; then
3751         add_extralibs -lpthreadGC2
3752     elif ! check_lib pthread.h pthread_create -lpthread; then
3753         disable pthreads
3754     fi
3755 fi
3756
3757 for thread in $THREADS_LIST; do
3758     if enabled $thread; then
3759         test -n "$thread_type" &&
3760             die "ERROR: Only one thread type must be selected." ||
3761             thread_type="$thread"
3762     fi
3763 done
3764
3765 enabled sync_val_compare_and_swap && enable atomics_gcc
3766 enabled_all atomic_cas_ptr machine_rw_barrier && enable atomics_suncc
3767 enabled MemoryBarrier && enable atomics_win32
3768
3769 check_lib math.h sin -lm && LIBM="-lm"
3770 enabled vaapi && require vaapi va/va.h vaInitialize -lva
3771
3772 atan2f_args=2
3773 ldexpf_args=2
3774 powf_args=2
3775
3776 for func in $MATH_FUNCS; do
3777     eval check_mathfunc $func \${${func}_args:-1}
3778 done
3779
3780 # these are off by default, so fail if requested and not available
3781 enabled avisynth          && require2 vfw32 "windows.h vfw.h" AVIFileInit -lavifil32
3782 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
3783 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
3784 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
3785 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
3786 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h freetype/freetype.h" FT_Init_FreeType
3787 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
3788                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
3789                                done || die "ERROR: libgsm not found"; }
3790 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
3791 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
3792 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
3793 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
3794 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
3795 enabled libopenjpeg       && require libopenjpeg openjpeg.h opj_version -lopenjpeg
3796 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
3797 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
3798 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
3799 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
3800 enabled libspeex          && require libspeex speex/speex.h speex_decoder_init -lspeex
3801 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
3802 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
3803 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
3804 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
3805 enabled libvpx            && {
3806     enabled libvpx_vp8_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
3807                                     die "ERROR: libvpx decoder version must be >=0.9.1"; }
3808     enabled libvpx_vp8_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_enc_init_ver VPX_CQ" -lvpx ||
3809                                     die "ERROR: libvpx encoder version must be >=0.9.6"; }
3810     enabled libvpx_vp9_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx" -lvpx || disable libvpx_vp9_decoder; }
3811     enabled libvpx_vp9_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_vp9_cx" -lvpx || disable libvpx_vp9_encoder; } }
3812 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
3813 enabled libx264           && require libx264 x264.h x264_encoder_encode -lx264 &&
3814                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
3815                                die "ERROR: libx264 version must be >= 0.118."; }
3816 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
3817 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
3818 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
3819                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
3820                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
3821                                die "ERROR: openssl not found"; }
3822
3823 if enabled gnutls; then
3824     { check_lib nettle/bignum.h nettle_mpz_get_str_256 -lnettle -lhogweed -lgmp && enable nettle; } ||
3825     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
3826 fi
3827
3828 # libdc1394 check
3829 if enabled libdc1394; then
3830     { check_lib dc1394/dc1394.h dc1394_new -ldc1394 -lraw1394 &&
3831         enable libdc1394_2; } ||
3832     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
3833         enable libdc1394_1; } ||
3834     die "ERROR: No version of libdc1394 found "
3835 fi
3836
3837 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
3838     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
3839     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
3840     enable sdl
3841 fi
3842
3843 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
3844
3845 check_header linux/fb.h
3846 check_header linux/videodev2.h
3847 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
3848
3849 check_header sys/videoio.h
3850
3851 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
3852 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
3853 # w32api 3.12 had it defined wrong
3854 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
3855
3856 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
3857 { check_header dev/bktr/ioctl_meteor.h &&
3858   check_header dev/bktr/ioctl_bt848.h; } ||
3859 { check_header machine/ioctl_meteor.h &&
3860   check_header machine/ioctl_bt848.h; } ||
3861 { check_header dev/video/meteor/ioctl_meteor.h &&
3862   check_header dev/video/bktr/ioctl_bt848.h; } ||
3863 check_header dev/ic/bt8xx.h
3864
3865 check_header sndio.h
3866 check_header sys/soundcard.h
3867 check_header soundcard.h
3868
3869 enabled_any alsa_indev alsa_outdev &&
3870     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
3871
3872 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
3873     check_func jack_port_get_latency_range -ljack
3874
3875 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
3876
3877 if enabled libcdio; then
3878     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
3879     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio
3880 fi
3881
3882 enabled x11grab                                           &&
3883 require X11 X11/Xlib.h XOpenDisplay -lX11                 &&
3884 require Xext X11/extensions/XShm.h XShmCreateImage -lXext &&
3885 require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
3886
3887 enabled vdpau &&
3888     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
3889     disable vdpau
3890
3891 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
3892
3893 # add some useful compiler flags if supported
3894 check_cflags -Wdeclaration-after-statement
3895 check_cflags -Wall
3896 check_cflags -Wno-parentheses
3897 check_cflags -Wno-switch
3898 check_cflags -Wno-format-zero-length
3899 check_cflags -Wdisabled-optimization
3900 check_cflags -Wpointer-arith
3901 check_cflags -Wredundant-decls
3902 check_cflags -Wno-pointer-sign
3903 check_cflags -Wcast-qual
3904 check_cflags -Wwrite-strings
3905 check_cflags -Wtype-limits
3906 check_cflags -Wundef
3907 check_cflags -Wmissing-prototypes
3908 check_cflags -Wstrict-prototypes
3909 enabled extra_warnings && check_cflags -Winline
3910
3911 # add some linker flags
3912 check_ldflags -Wl,--warn-common
3913 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
3914 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
3915
3916 enabled xmm_clobber_test &&
3917     check_ldflags -Wl,--wrap,avcodec_open2              \
3918                   -Wl,--wrap,avcodec_decode_audio4      \
3919                   -Wl,--wrap,avcodec_decode_video2      \
3920                   -Wl,--wrap,avcodec_decode_subtitle2   \
3921                   -Wl,--wrap,avcodec_encode_audio2      \
3922                   -Wl,--wrap,avcodec_encode_video2      \
3923                   -Wl,--wrap,avcodec_encode_subtitle    \
3924                   -Wl,--wrap,sws_scale ||
3925     disable xmm_clobber_test
3926
3927 echo "X{};" > $TMPV
3928 if test_ldflags -Wl,--version-script,$TMPV; then
3929     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
3930     check_cc <<EOF && enable symver_asm_label
3931 void ff_foo(void) __asm__ ("av_foo@VERSION");
3932 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
3933 EOF
3934     check_cc <<EOF && enable symver_gnu_asm
3935 __asm__(".symver ff_foo,av_foo@VERSION");
3936 void ff_foo(void) {}
3937 EOF
3938 fi
3939
3940 if [ -z "$optflags" ]; then
3941     if enabled small; then
3942         optflags=$cflags_size
3943     elif enabled optimizations; then
3944         optflags=$cflags_speed
3945     else
3946         optflags=$cflags_noopt
3947     fi
3948 fi
3949
3950 check_optflags(){
3951     check_cflags "$@"
3952     enabled lto && check_ldflags "$@"
3953 }
3954
3955
3956 if enabled lto; then
3957     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
3958     check_cflags  -flto
3959     check_ldflags -flto $cpuflags
3960 fi
3961
3962 check_optflags $optflags
3963 check_optflags -fno-math-errno
3964 check_optflags -fno-signed-zeros
3965
3966 if enabled icc; then
3967     # Just warnings, no remarks
3968     check_cflags -w1
3969     # -wd: Disable following warnings
3970     # 144, 167, 556: -Wno-pointer-sign
3971     # 1292: attribute "foo" ignored
3972     # 1419: external declaration in primary source file
3973     # 10006: ignoring unknown option -fno-signed-zeros
3974     # 10148: ignoring unknown option -Wno-parentheses
3975     # 10156: ignoring option '-W'; no argument required
3976     check_cflags -wd144,167,556,1292,1419,10006,10148,10156
3977     # 11030: Warning unknown option --as-needed
3978     # 10156: ignoring option '-export'; no argument required
3979     check_ldflags -wd10156,11030
3980     # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
3981     enable ebp_available
3982     if enabled x86_32; then
3983         icc_version=$($cc -dumpversion)
3984         test ${icc_version%%.*} -ge 11 &&
3985             check_cflags -falign-stack=maintain-16-byte ||
3986             disable aligned_stack
3987     fi
3988 elif enabled ccc; then
3989     # disable some annoying warnings
3990     add_cflags -msg_disable bitnotint
3991     add_cflags -msg_disable mixfuncvoid
3992     add_cflags -msg_disable nonstandcast
3993     add_cflags -msg_disable unsupieee
3994 elif enabled gcc; then
3995     check_optflags -fno-tree-vectorize
3996     check_cflags -Werror=implicit-function-declaration
3997     check_cflags -Werror=missing-prototypes
3998     check_cflags -Werror=return-type
3999     check_cflags -Werror=declaration-after-statement
4000     check_cflags -Werror=vla
4001 elif enabled llvm_gcc; then
4002     check_cflags -mllvm -stack-alignment=16
4003 elif enabled clang; then
4004     check_cflags -mllvm -stack-alignment=16
4005     check_cflags -Qunused-arguments
4006     check_cflags -Werror=implicit-function-declaration
4007     check_cflags -Werror=missing-prototypes
4008     check_cflags -Werror=return-type
4009 elif enabled cparser; then
4010     add_cflags -Wno-missing-variable-declarations
4011     add_cflags -Wno-empty-statement
4012 elif enabled armcc; then
4013     # 2523: use of inline assembler is deprecated
4014     add_cflags -W${armcc_opt},--diag_suppress=2523
4015     add_cflags -W${armcc_opt},--diag_suppress=1207
4016     add_cflags -W${armcc_opt},--diag_suppress=1293 # assignment in condition
4017     add_cflags -W${armcc_opt},--diag_suppress=3343 # hardfp compat
4018     add_cflags -W${armcc_opt},--diag_suppress=167  # pointer sign
4019     add_cflags -W${armcc_opt},--diag_suppress=513  # pointer sign
4020 elif enabled tms470; then
4021     add_cflags -pds=824 -pds=837
4022 elif enabled pathscale; then
4023     add_cflags -fstrict-overflow -OPT:wrap_around_unsafe_opt=OFF
4024 elif enabled_any msvc icl; then