766f6367d50d030bda9becfb1b3ea9a9c8498c10
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix]
82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
85   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89
90 Licensing options:
91   --enable-gpl             allow use of GPL code, the resulting libs
92                            and binaries will be under GPL [no]
93   --enable-version3        upgrade (L)GPL to version 3 [no]
94   --enable-nonfree         allow use of nonfree code, the resulting libs
95                            and binaries will be unredistributable [no]
96
97 Configuration options:
98   --disable-static         do not build static libraries [no]
99   --enable-shared          build shared libraries [no]
100   --enable-small           optimize for size instead of speed
101   --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
102   --enable-gray            enable full grayscale support (slower color)
103   --disable-swscale-alpha  disable alpha channel support in swscale
104   --disable-all            disable building components, libraries and programs
105
106 Program options:
107   --disable-programs       do not build command line programs
108   --disable-avconv         disable avconv build
109   --disable-avplay         disable avplay build
110   --disable-avprobe        disable avprobe build
111   --disable-avserver       disable avserver build
112
113 Component options:
114   --disable-doc            do not build documentation
115   --disable-avdevice       disable libavdevice build
116   --disable-avcodec        disable libavcodec build
117   --disable-avformat       disable libavformat build
118   --disable-avutil         disable libavutil build
119   --disable-swscale        disable libswscale build
120   --disable-avfilter       disable video filter support [no]
121   --disable-avresample     disable libavresample build [no]
122   --disable-pthreads       disable pthreads [auto]
123   --disable-w32threads     disable Win32 threads [auto]
124   --disable-network        disable network support [no]
125   --disable-dct            disable DCT code
126   --disable-error-resilience disable error resilience code
127   --disable-lsp            disable LSP code
128   --disable-lzo            disable LZO decoder code
129   --disable-mdct           disable MDCT code
130   --disable-rdft           disable RDFT code
131   --disable-fft            disable FFT code
132
133 Hardware accelerators:
134   --enable-dxva2           enable DXVA2 code
135   --enable-vaapi           enable VAAPI code
136   --enable-vda             enable VDA code
137   --enable-vdpau           enable VDPAU code
138
139 Individual component options:
140   --disable-everything     disable all components listed below
141   --disable-encoder=NAME   disable encoder NAME
142   --enable-encoder=NAME    enable encoder NAME
143   --disable-encoders       disable all encoders
144   --disable-decoder=NAME   disable decoder NAME
145   --enable-decoder=NAME    enable decoder NAME
146   --disable-decoders       disable all decoders
147   --disable-hwaccel=NAME   disable hwaccel NAME
148   --enable-hwaccel=NAME    enable hwaccel NAME
149   --disable-hwaccels       disable all hwaccels
150   --disable-muxer=NAME     disable muxer NAME
151   --enable-muxer=NAME      enable muxer NAME
152   --disable-muxers         disable all muxers
153   --disable-demuxer=NAME   disable demuxer NAME
154   --enable-demuxer=NAME    enable demuxer NAME
155   --disable-demuxers       disable all demuxers
156   --enable-parser=NAME     enable parser NAME
157   --disable-parser=NAME    disable parser NAME
158   --disable-parsers        disable all parsers
159   --enable-bsf=NAME        enable bitstream filter NAME
160   --disable-bsf=NAME       disable bitstream filter NAME
161   --disable-bsfs           disable all bitstream filters
162   --enable-protocol=NAME   enable protocol NAME
163   --disable-protocol=NAME  disable protocol NAME
164   --disable-protocols      disable all protocols
165   --enable-indev=NAME      enable input device NAME
166   --disable-indev=NAME     disable input device NAME
167   --disable-indevs         disable input devices
168   --enable-outdev=NAME     enable output device NAME
169   --disable-outdev=NAME    disable output device NAME
170   --disable-outdevs        disable output devices
171   --disable-devices        disable all devices
172   --enable-filter=NAME     enable filter NAME
173   --disable-filter=NAME    disable filter NAME
174   --disable-filters        disable all filters
175
176 External library support:
177   --enable-avisynth        enable reading of AviSynth script files [no]
178   --enable-bzlib           enable bzlib [autodetect]
179   --enable-frei0r          enable frei0r video filtering
180   --enable-gnutls          enable gnutls [no]
181   --enable-libcdio         enable audio CD grabbing with libcdio
182   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
183                            and libraw1394 [no]
184   --enable-libfaac         enable AAC encoding via libfaac [no]
185   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
186   --enable-libfreetype     enable libfreetype [no]
187   --enable-libgsm          enable GSM de/encoding via libgsm [no]
188   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
189   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
190   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
191   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
192   --enable-libopencv       enable video filtering via libopencv [no]
193   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
194   --enable-libopus         enable Opus decoding via libopus [no]
195   --enable-libpulse        enable Pulseaudio input via libpulse [no]
196   --enable-librtmp         enable RTMP[E] support via librtmp [no]
197   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
198   --enable-libspeex        enable Speex de/encoding via libspeex [no]
199   --enable-libtheora       enable Theora encoding via libtheora [no]
200   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
201   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
202   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
203   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
204   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
205   --enable-libwebp         enable WebP encoding via libwebp [no]
206   --enable-libx264         enable H.264 encoding via x264 [no]
207   --enable-libx265         enable HEVC encoding via x265 [no]
208   --enable-libxavs         enable AVS encoding via xavs [no]
209   --enable-libxvid         enable Xvid encoding via xvidcore,
210                            native MPEG-4/Xvid encoder exists [no]
211   --enable-openssl         enable openssl [no]
212   --enable-x11grab         enable X11 grabbing [no]
213   --enable-zlib            enable zlib [autodetect]
214
215 Toolchain options:
216   --arch=ARCH              select architecture [$arch]
217   --cpu=CPU                select the minimum required CPU (affects
218                            instruction selection, may crash on older CPUs)
219   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
220   --enable-cross-compile   assume a cross-compiler is used
221   --sysroot=PATH           root of cross-build tree
222   --sysinclude=PATH        location of cross-build system headers
223   --target-os=OS           compiler targets OS [$target_os]
224   --target-exec=CMD        command to run executables on target
225   --target-path=DIR        path to view of build directory on target
226   --target-samples=DIR     path to samples directory on target
227   --toolchain=NAME         set tool defaults according to NAME
228   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
229   --nm=NM                  use nm tool
230   --ar=AR                  use archive tool AR [$ar_default]
231   --as=AS                  use assembler AS [$as_default]
232   --cc=CC                  use C compiler CC [$cc_default]
233   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
234   --ld=LD                  use linker LD
235   --pkg-config=PKGCONF     use pkg-config PKGCONF [$pkg_config_default]
236   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
237   --host-cc=HOSTCC         use host C compiler HOSTCC
238   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
239   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
240   --host-ld=HOSTLD         use host linker HOSTLD
241   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
242   --host-libs=HLIBS        use libs HLIBS when linking for host
243   --host-os=OS             compiler host OS [$target_os]
244   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
245   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
246   --extra-libs=ELIBS       add ELIBS [$ELIBS]
247   --extra-version=STRING   version string suffix []
248   --optflags=OPTFLAGS      override optimization-related compiler flags
249   --build-suffix=SUFFIX    library name suffix []
250   --enable-pic             build position-independent code
251   --enable-thumb           compile for Thumb instruction set
252   --enable-lto             use link-time optimization
253
254 Advanced options (experts only):
255   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
256   --disable-symver         disable symbol versioning
257   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
258   --disable-safe-bitstream-reader
259                            disable buffer boundary checking in bitreaders
260                            (faster, but may crash)
261   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
262   --enable-sram            allow use of on-chip SRAM
263
264 Optimization options (experts only):
265   --disable-asm            disable all assembler optimizations
266   --disable-altivec        disable AltiVec optimizations
267   --disable-amd3dnow       disable 3DNow! optimizations
268   --disable-amd3dnowext    disable 3DNow! extended optimizations
269   --disable-mmx            disable MMX optimizations
270   --disable-mmxext         disable MMXEXT optimizations
271   --disable-sse            disable SSE optimizations
272   --disable-sse2           disable SSE2 optimizations
273   --disable-sse3           disable SSE3 optimizations
274   --disable-ssse3          disable SSSE3 optimizations
275   --disable-sse4           disable SSE4 optimizations
276   --disable-sse42          disable SSE4.2 optimizations
277   --disable-avx            disable AVX optimizations
278   --disable-xop            disable XOP optimizations
279   --disable-fma3           disable FMA3 optimizations
280   --disable-fma4           disable FMA4 optimizations
281   --disable-avx2           disable AVX2 optimizations
282   --disable-armv5te        disable armv5te optimizations
283   --disable-armv6          disable armv6 optimizations
284   --disable-armv6t2        disable armv6t2 optimizations
285   --disable-vfp            disable VFP optimizations
286   --disable-neon           disable NEON optimizations
287   --disable-inline-asm     disable use of inline assembler
288   --disable-yasm           disable use of yasm assembler
289
290 Developer options (useful when working on Libav itself):
291   --disable-debug          disable debugging symbols
292   --enable-debug=LEVEL     set the debug level [$debuglevel]
293   --disable-optimizations  disable compiler optimizations
294   --enable-extra-warnings  enable more compiler warnings
295   --samples=PATH           location of test samples for FATE, if not set use
296                            \$LIBAV_SAMPLES at make invocation time.
297   --enable-neon-clobber-test check NEON registers for clobbering (should be
298                            used only for debugging purposes)
299   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
300                            should be used only for debugging purposes)
301   --enable-random          randomly enable/disable components
302   --disable-random
303   --enable-random=LIST     randomly enable/disable specific components or
304   --disable-random=LIST    component groups. LIST is a comma-separated list
305                            of NAME[:PROB] entries where NAME is a component
306                            (group) and PROB the probability associated with
307                            NAME (default 0.5).
308   --random-seed=VALUE      seed value for --enable/disable-random
309
310 NOTE: Object files are built at the place where configure is launched.
311 EOF
312   exit 0
313 }
314
315 quotes='""'
316
317 log(){
318     echo "$@" >> $logfile
319 }
320
321 log_file(){
322     log BEGIN $1
323     pr -n -t $1 >> $logfile
324     log END $1
325 }
326
327 echolog(){
328     log "$@"
329     echo "$@"
330 }
331
332 warn(){
333     log "WARNING: $*"
334     WARNINGS="${WARNINGS}WARNING: $*\n"
335 }
336
337 die(){
338     echolog "$@"
339     cat <<EOF
340
341 If you think configure made a mistake, make sure you are using the latest
342 version from Git.  If the latest version fails, report the problem to the
343 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
344 EOF
345     if disabled logging; then
346         cat <<EOF
347 Rerun configure with logging enabled (do not use --disable-logging), and
348 include the log this produces with your report.
349 EOF
350     else
351         cat <<EOF
352 Include the log file "$logfile" produced by configure as this will help
353 solving the problem.
354 EOF
355     fi
356     exit 1
357 }
358
359 # Avoid locale weirdness, besides we really just want to translate ASCII.
360 toupper(){
361     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
362 }
363
364 tolower(){
365     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
366 }
367
368 c_escape(){
369     echo "$*" | sed 's/["\\]/\\\0/g'
370 }
371
372 sh_quote(){
373     v=$(echo "$1" | sed "s/'/'\\\\''/g")
374     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
375     echo "$v"
376 }
377
378 cleanws(){
379     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
380 }
381
382 filter(){
383     pat=$1
384     shift
385     for v; do
386         eval "case $v in $pat) echo $v ;; esac"
387     done
388 }
389
390 filter_out(){
391     pat=$1
392     shift
393     for v; do
394         eval "case $v in $pat) ;; *) echo $v ;; esac"
395     done
396 }
397
398 map(){
399     m=$1
400     shift
401     for v; do eval $m; done
402 }
403
404 add_suffix(){
405     suffix=$1
406     shift
407     for v; do echo ${v}${suffix}; done
408 }
409
410 set_all(){
411     value=$1
412     shift
413     for var in $*; do
414         eval $var=$value
415     done
416 }
417
418 set_weak(){
419     value=$1
420     shift
421     for var; do
422         eval : \${$var:=$value}
423     done
424 }
425
426 sanitize_var_name(){
427     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
428 }
429
430 set_safe(){
431     var=$1
432     shift
433     eval $(sanitize_var_name "$var")='$*'
434 }
435
436 get_safe(){
437     eval echo \$$(sanitize_var_name "$1")
438 }
439
440 pushvar(){
441     for pvar in $*; do
442         eval level=\${${pvar}_level:=0}
443         eval ${pvar}_${level}="\$$pvar"
444         eval ${pvar}_level=$(($level+1))
445     done
446 }
447
448 popvar(){
449     for pvar in $*; do
450         eval level=\${${pvar}_level:-0}
451         test $level = 0 && continue
452         eval level=$(($level-1))
453         eval $pvar="\${${pvar}_${level}}"
454         eval ${pvar}_level=$level
455         eval unset ${pvar}_${level}
456     done
457 }
458
459 enable(){
460     set_all yes $*
461 }
462
463 disable(){
464     set_all no $*
465 }
466
467 enable_weak(){
468     set_weak yes $*
469 }
470
471 disable_weak(){
472     set_weak no $*
473 }
474
475 enable_safe(){
476     for var; do
477         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
478     done
479 }
480
481 disable_safe(){
482     for var; do
483         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
484     done
485 }
486
487 do_enable_deep(){
488     for var; do
489         enabled $var && continue
490         eval sel="\$${var}_select"
491         eval sgs="\$${var}_suggest"
492         pushvar var sgs
493         enable_deep $sel
494         popvar sgs
495         enable_deep_weak $sgs
496         popvar var
497     done
498 }
499
500 enable_deep(){
501     do_enable_deep $*
502     enable $*
503 }
504
505 enable_deep_weak(){
506     for var; do
507         disabled $var && continue
508         pushvar var
509         do_enable_deep $var
510         popvar var
511         enable_weak $var
512     done
513 }
514
515 enabled(){
516     test "${1#!}" = "$1" && op== || op=!=
517     eval test "x\$${1#!}" $op "xyes"
518 }
519
520 disabled(){
521     test "${1#!}" = "$1" && op== || op=!=
522     eval test "x\$${1#!}" $op "xno"
523 }
524
525 enabled_all(){
526     for opt; do
527         enabled $opt || return 1
528     done
529 }
530
531 disabled_all(){
532     for opt; do
533         disabled $opt || return 1
534     done
535 }
536
537 enabled_any(){
538     for opt; do
539         enabled $opt && return 0
540     done
541 }
542
543 disabled_any(){
544     for opt; do
545         disabled $opt && return 0
546     done
547     return 1
548 }
549
550 set_default(){
551     for opt; do
552         eval : \${$opt:=\$${opt}_default}
553     done
554 }
555
556 is_in(){
557     value=$1
558     shift
559     for var in $*; do
560         [ $var = $value ] && return 0
561     done
562     return 1
563 }
564
565 do_check_deps(){
566     for cfg; do
567         cfg="${cfg#!}"
568         enabled ${cfg}_checking && die "Circular dependency for $cfg."
569         disabled ${cfg}_checking && continue
570         enable ${cfg}_checking
571         append allopts $cfg
572
573         eval dep_all="\$${cfg}_deps"
574         eval dep_any="\$${cfg}_deps_any"
575         eval dep_sel="\$${cfg}_select"
576         eval dep_sgs="\$${cfg}_suggest"
577         eval dep_ifa="\$${cfg}_if"
578         eval dep_ifn="\$${cfg}_if_any"
579
580         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
581         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
582         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
583
584         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
585         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
586         enabled_all  $dep_all || disable $cfg
587         enabled_any  $dep_any || disable $cfg
588         disabled_any $dep_sel && disable $cfg
589
590         if enabled $cfg; then
591             enable_deep $dep_sel
592             enable_deep_weak $dep_sgs
593         fi
594
595         disable ${cfg}_checking
596     done
597 }
598
599 check_deps(){
600     unset allopts
601
602     do_check_deps "$@"
603
604     for cfg in $allopts; do
605         enabled $cfg || continue
606         eval dep_extralibs="\$${cfg}_extralibs"
607         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
608     done
609 }
610
611 print_config(){
612     pfx=$1
613     files=$2
614     shift 2
615     map 'eval echo "$v \${$v:-no}"' "$@" |
616     awk "BEGIN { split(\"$files\", files) }
617         {
618             c = \"$pfx\" toupper(\$1);
619             v = \$2;
620             sub(/yes/, 1, v);
621             sub(/no/,  0, v);
622             for (f in files) {
623                 file = files[f];
624                 if (file ~ /\\.h\$/) {
625                     printf(\"#define %s %d\\n\", c, v) >>file;
626                 } else if (file ~ /\\.asm\$/) {
627                     printf(\"%%define %s %d\\n\", c, v) >>file;
628                 } else if (file ~ /\\.mak\$/) {
629                     n = -v ? \"\" : \"!\";
630                     printf(\"%s%s=yes\\n\", n, c) >>file;
631                 }
632             }
633         }"
634 }
635
636 print_enabled(){
637     suf=$1
638     shift
639     for v; do
640         enabled $v && printf "%s\n" ${v%$suf};
641     done
642 }
643
644 append(){
645     var=$1
646     shift
647     eval "$var=\"\$$var $*\""
648 }
649
650 prepend(){
651     var=$1
652     shift
653     eval "$var=\"$* \$$var\""
654 }
655
656 add_cppflags(){
657     append CPPFLAGS "$@"
658 }
659
660 add_cflags(){
661     append CFLAGS $($cflags_filter "$@")
662 }
663
664 add_asflags(){
665     append ASFLAGS $($asflags_filter "$@")
666 }
667
668 add_ldflags(){
669     append LDFLAGS $($ldflags_filter "$@")
670 }
671
672 add_stripflags(){
673     append STRIPFLAGS "$@"
674 }
675
676 add_extralibs(){
677     prepend extralibs $($ldflags_filter "$@")
678 }
679
680 add_host_cppflags(){
681     append host_cppflags "$@"
682 }
683
684 add_host_cflags(){
685     append host_cflags $($host_cflags_filter "$@")
686 }
687
688 add_host_ldflags(){
689     append host_ldflags $($host_ldflags_filter "$@")
690 }
691
692 add_compat(){
693     append compat_objs $1
694     shift
695     map 'add_cppflags -D$v' "$@"
696 }
697
698 check_cmd(){
699     log "$@"
700     "$@" >> $logfile 2>&1
701 }
702
703 cc_o(){
704     eval printf '%s\\n' $CC_O
705 }
706
707 cc_e(){
708     eval printf '%s\\n' $CC_E
709 }
710
711 check_cc(){
712     log check_cc "$@"
713     cat > $TMPC
714     log_file $TMPC
715     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
716 }
717
718 check_cpp(){
719     log check_cpp "$@"
720     cat > $TMPC
721     log_file $TMPC
722     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
723 }
724
725 as_o(){
726     eval printf '%s\\n' $AS_O
727 }
728
729 check_as(){
730     log check_as "$@"
731     cat > $TMPS
732     log_file $TMPS
733     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
734 }
735
736 check_inline_asm(){
737     log check_inline_asm "$@"
738     name="$1"
739     code="$2"
740     shift 2
741     disable $name
742     check_cc "$@" <<EOF && enable $name
743 void foo(void){ __asm__ volatile($code); }
744 EOF
745 }
746
747 check_insn(){
748     log check_insn "$@"
749     check_inline_asm ${1}_inline "\"$2\""
750     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
751 }
752
753 check_yasm(){
754     log check_yasm "$@"
755     echo "$1" > $TMPS
756     log_file $TMPS
757     shift 1
758     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
759 }
760
761 ld_o(){
762     eval printf '%s\\n' $LD_O
763 }
764
765 check_ld(){
766     log check_ld "$@"
767     flags=$(filter_out '-l*' "$@")
768     libs=$(filter '-l*' "$@")
769     check_cc $($cflags_filter $flags) || return
770     flags=$($ldflags_filter $flags)
771     libs=$($ldflags_filter $libs)
772     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
773 }
774
775 print_include(){
776     hdr=$1
777     test "${hdr%.h}" = "${hdr}" &&
778         echo "#include $hdr"    ||
779         echo "#include <$hdr>"
780 }
781
782 check_code(){
783     log check_code "$@"
784     check=$1
785     headers=$2
786     code=$3
787     shift 3
788     {
789         for hdr in $headers; do
790             print_include $hdr
791         done
792         echo "int main(void) { $code; return 0; }"
793     } | check_$check "$@"
794 }
795
796 check_cppflags(){
797     log check_cppflags "$@"
798     check_cc "$@" <<EOF && append CPPFLAGS "$@"
799 int x;
800 EOF
801 }
802
803 test_cflags(){
804     log test_cflags "$@"
805     set -- $($cflags_filter "$@")
806     check_cc "$@" <<EOF
807 int x;
808 EOF
809 }
810
811 check_cflags(){
812     log check_cflags "$@"
813     test_cflags "$@" && add_cflags "$@"
814 }
815
816 test_ldflags(){
817     log test_ldflags "$@"
818     check_ld "$@" <<EOF
819 int main(void){ return 0; }
820 EOF
821 }
822
823 check_ldflags(){
824     log check_ldflags "$@"
825     test_ldflags "$@" && add_ldflags "$@"
826 }
827
828 test_stripflags(){
829     log test_stripflags "$@"
830     # call check_cc to get a fresh TMPO
831     check_cc <<EOF
832 int main(void) { return 0; }
833 EOF
834     check_cmd $strip $STRIPFLAGS "$@" $TMPO
835 }
836
837 check_stripflags(){
838     log check_stripflags "$@"
839     test_stripflags "$@" && add_stripflags "$@"
840 }
841
842 check_header(){
843     log check_header "$@"
844     header=$1
845     shift
846     disable_safe $header
847     check_cpp "$@" <<EOF && enable_safe $header
848 #include <$header>
849 int x;
850 EOF
851 }
852
853 check_func(){
854     log check_func "$@"
855     func=$1
856     shift
857     disable $func
858     check_ld "$@" <<EOF && enable $func
859 extern int $func();
860 int main(void){ $func(); }
861 EOF
862 }
863
864 check_mathfunc(){
865     log check_mathfunc "$@"
866     func=$1
867     narg=$2
868     shift 2
869     test $narg = 2 && args="f, g" || args="f"
870     disable $func
871     check_ld "$@" <<EOF && enable $func
872 #include <math.h>
873 float foo(float f, float g) { return $func($args); }
874 int main(void){ return 0; }
875 EOF
876 }
877
878 check_func_headers(){
879     log check_func_headers "$@"
880     headers=$1
881     funcs=$2
882     shift 2
883     {
884         for hdr in $headers; do
885             print_include $hdr
886         done
887         for func in $funcs; do
888             echo "long check_$func(void) { return (long) $func; }"
889         done
890         echo "int main(void) { return 0; }"
891     } | check_ld "$@" && enable $funcs && enable_safe $headers
892 }
893
894 check_cpp_condition(){
895     log check_cpp_condition "$@"
896     header=$1
897     condition=$2
898     shift 2
899     check_cpp "$@" <<EOF
900 #include <$header>
901 #if !($condition)
902 #error "unsatisfied condition: $condition"
903 #endif
904 EOF
905 }
906
907 check_lib(){
908     log check_lib "$@"
909     header="$1"
910     func="$2"
911     shift 2
912     check_header $header && check_func $func "$@" && add_extralibs "$@"
913 }
914
915 check_lib2(){
916     log check_lib2 "$@"
917     headers="$1"
918     funcs="$2"
919     shift 2
920     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
921 }
922
923 check_pkg_config(){
924     log check_pkg_config "$@"
925     pkg="$1"
926     headers="$2"
927     funcs="$3"
928     shift 3
929     check_cmd $pkg_config --exists --print-errors $pkg || return
930     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
931     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
932     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
933         set_safe ${pkg}_cflags $pkg_cflags   &&
934         set_safe ${pkg}_libs   $pkg_libs
935 }
936
937 check_exec(){
938     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
939 }
940
941 check_exec_crash(){
942     code=$(cat)
943
944     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
945     # are safe but may not be available everywhere.  Thus we use
946     # raise(SIGTERM) instead.  The check is run in a subshell so we
947     # can redirect the "Terminated" message from the shell.  SIGBUS
948     # is not defined by standard C so it is used conditionally.
949
950     (check_exec "$@") >> $logfile 2>&1 <<EOF
951 #include <signal.h>
952 static void sighandler(int sig){
953     raise(SIGTERM);
954 }
955 int foo(void){
956     $code
957 }
958 int (*func_ptr)(void) = foo;
959 int main(void){
960     signal(SIGILL, sighandler);
961     signal(SIGFPE, sighandler);
962     signal(SIGSEGV, sighandler);
963 #ifdef SIGBUS
964     signal(SIGBUS, sighandler);
965 #endif
966     return func_ptr();
967 }
968 EOF
969 }
970
971 check_type(){
972     log check_type "$@"
973     headers=$1
974     type=$2
975     shift 2
976     disable_safe "$type"
977     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
978 }
979
980 check_struct(){
981     log check_struct "$@"
982     headers=$1
983     struct=$2
984     member=$3
985     shift 3
986     disable_safe "${struct}_${member}"
987     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
988         enable_safe "${struct}_${member}"
989 }
990
991 check_builtin(){
992     log check_builtin "$@"
993     name=$1
994     headers=$2
995     builtin=$3
996     shift 3
997     disable "$name"
998     check_code ld "$headers" "$builtin" "$@" && enable "$name"
999 }
1000
1001 check_compile_assert(){
1002     log check_compile_assert "$@"
1003     name=$1
1004     headers=$2
1005     condition=$3
1006     shift 3
1007     disable "$name"
1008     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1009 }
1010
1011 require(){
1012     name="$1"
1013     header="$2"
1014     func="$3"
1015     shift 3
1016     check_lib $header $func "$@" || die "ERROR: $name not found"
1017 }
1018
1019 require2(){
1020     name="$1"
1021     headers="$2"
1022     func="$3"
1023     shift 3
1024     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1025 }
1026
1027 require_pkg_config(){
1028     pkg="$1"
1029     check_pkg_config "$@" || die "ERROR: $pkg not found"
1030     add_cflags    $(get_safe ${pkg}_cflags)
1031     add_extralibs $(get_safe ${pkg}_libs)
1032 }
1033
1034 hostcc_e(){
1035     eval printf '%s\\n' $HOSTCC_E
1036 }
1037
1038 hostcc_o(){
1039     eval printf '%s\\n' $HOSTCC_O
1040 }
1041
1042 check_host_cc(){
1043     log check_host_cc "$@"
1044     cat > $TMPC
1045     log_file $TMPC
1046     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1047 }
1048
1049 check_host_cpp(){
1050     log check_host_cpp "$@"
1051     cat > $TMPC
1052     log_file $TMPC
1053     check_cmd $host_cc $HOSTCPPFLAGS $HOSTCFLAGS "$@" $(hostcc_e $TMPO) $TMPC
1054 }
1055
1056 check_host_cppflags(){
1057     log check_host_cppflags "$@"
1058     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1059 int x;
1060 EOF
1061 }
1062
1063 check_host_cflags(){
1064     log check_host_cflags "$@"
1065     set -- $($host_cflags_filter "$@")
1066     check_host_cc "$@" <<EOF && append host_cflags "$@"
1067 int x;
1068 EOF
1069 }
1070
1071 check_host_cpp_condition(){
1072     log check_host_cpp_condition "$@"
1073     header=$1
1074     condition=$2
1075     shift 2
1076     check_host_cpp "$@" <<EOF
1077 #include <$header>
1078 #if !($condition)
1079 #error "unsatisfied condition: $condition"
1080 #endif
1081 EOF
1082 }
1083
1084 apply(){
1085     file=$1
1086     shift
1087     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1088 }
1089
1090 cp_if_changed(){
1091     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1092     mkdir -p "$(dirname $2)"
1093     $cp_f "$1" "$2"
1094 }
1095
1096 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1097 # system-dependent things.
1098
1099 COMPONENT_LIST="
1100     bsfs
1101     decoders
1102     demuxers
1103     encoders
1104     filters
1105     hwaccels
1106     indevs
1107     muxers
1108     outdevs
1109     parsers
1110     protocols
1111 "
1112
1113 EXAMPLE_LIST="
1114     avcodec_example
1115     filter_audio_example
1116     metadata_example
1117     output_example
1118     transcode_aac_example
1119 "
1120
1121 EXTERNAL_LIBRARY_LIST="
1122     avisynth
1123     bzlib
1124     frei0r
1125     gnutls
1126     libcdio
1127     libdc1394
1128     libfaac
1129     libfdk_aac
1130     libfreetype
1131     libgsm
1132     libilbc
1133     libmp3lame
1134     libopencore_amrnb
1135     libopencore_amrwb
1136     libopencv
1137     libopenjpeg
1138     libopus
1139     libpulse
1140     librtmp
1141     libschroedinger
1142     libspeex
1143     libtheora
1144     libvo_aacenc
1145     libvo_amrwbenc
1146     libvorbis
1147     libvpx
1148     libwavpack
1149     libwebp
1150     libx264
1151     libx265
1152     libxavs
1153     libxvid
1154     openssl
1155     x11grab
1156     zlib
1157 "
1158
1159 FEATURE_LIST="
1160     gray
1161     hardcoded_tables
1162     runtime_cpudetect
1163     safe_bitstream_reader
1164     shared
1165     small
1166     sram
1167     static
1168     swscale_alpha
1169 "
1170
1171 HWACCEL_LIST="
1172     dxva2
1173     vaapi
1174     vda
1175     vdpau
1176 "
1177
1178 LIBRARY_LIST="
1179     avcodec
1180     avdevice
1181     avfilter
1182     avformat
1183     avresample
1184     avutil
1185     swscale
1186 "
1187
1188 LICENSE_LIST="
1189     gpl
1190     nonfree
1191     version3
1192 "
1193
1194 PROGRAM_LIST="
1195     avconv
1196     avplay
1197     avprobe
1198     avserver
1199 "
1200
1201 SUBSYSTEM_LIST="
1202     dct
1203     doc
1204     error_resilience
1205     fft
1206     lsp
1207     lzo
1208     mdct
1209     network
1210     rdft
1211 "
1212
1213 CONFIG_LIST="
1214     $COMPONENT_LIST
1215     $EXAMPLE_LIST
1216     $EXTERNAL_LIBRARY_LIST
1217     $FEATURE_LIST
1218     $HWACCEL_LIST
1219     $LICENSE_LIST
1220     $LIBRARY_LIST
1221     $PROGRAM_LIST
1222     $SUBSYSTEM_LIST
1223     memalign_hack
1224     neon_clobber_test
1225     pic
1226     pod2man
1227     texi2html
1228     thumb
1229     xmm_clobber_test
1230 "
1231
1232 THREADS_LIST="
1233     pthreads
1234     w32threads
1235 "
1236
1237 ATOMICS_LIST="
1238     atomics_gcc
1239     atomics_suncc
1240     atomics_win32
1241 "
1242
1243 ARCH_LIST="
1244     aarch64
1245     alpha
1246     arm
1247     avr32
1248     avr32_ap
1249     avr32_uc
1250     bfin
1251     ia64
1252     m68k
1253     mips
1254     mips64
1255     parisc
1256     ppc
1257     ppc64
1258     s390
1259     sh4
1260     sparc
1261     sparc64
1262     tilegx
1263     tilepro
1264     tomi
1265     x86
1266     x86_32
1267     x86_64
1268 "
1269
1270 ARCH_EXT_LIST_ARM="
1271     armv5te
1272     armv6
1273     armv6t2
1274     neon
1275     vfp
1276     vfpv3
1277 "
1278
1279 ARCH_EXT_LIST_X86_SIMD="
1280     amd3dnow
1281     amd3dnowext
1282     avx
1283     avx2
1284     fma3
1285     fma4
1286     mmx
1287     mmxext
1288     sse
1289     sse2
1290     sse3
1291     sse4
1292     sse42
1293     ssse3
1294     xop
1295 "
1296
1297 ARCH_EXT_LIST_PPC="
1298     altivec
1299     dcbzl
1300     ldbrx
1301     ppc4xx
1302 "
1303
1304 ARCH_EXT_LIST_X86="
1305     $ARCH_EXT_LIST_X86_SIMD
1306     cpunop
1307     i686
1308 "
1309
1310 ARCH_EXT_LIST="
1311     $ARCH_EXT_LIST_ARM
1312     $ARCH_EXT_LIST_PPC
1313     $ARCH_EXT_LIST_X86
1314     loongson
1315     vis
1316 "
1317
1318 ARCH_FEATURES="
1319     aligned_stack
1320     fast_64bit
1321     fast_clz
1322     fast_cmov
1323     local_aligned_8
1324     local_aligned_16
1325 "
1326
1327 BUILTIN_LIST="
1328     atomic_cas_ptr
1329     machine_rw_barrier
1330     MemoryBarrier
1331     mm_empty
1332     rdtsc
1333     sync_val_compare_and_swap
1334 "
1335 HAVE_LIST_CMDLINE="
1336     inline_asm
1337     symver
1338     yasm
1339 "
1340
1341 HAVE_LIST_PUB="
1342     bigendian
1343     fast_unaligned
1344 "
1345
1346 HEADERS_LIST="
1347     alsa_asoundlib_h
1348     altivec_h
1349     arpa_inet_h
1350     cdio_paranoia_h
1351     cdio_paranoia_paranoia_h
1352     dev_bktr_ioctl_bt848_h
1353     dev_bktr_ioctl_meteor_h
1354     dev_ic_bt8xx_h
1355     dev_video_bktr_ioctl_bt848_h
1356     dev_video_meteor_ioctl_meteor_h
1357     direct_h
1358     dlfcn_h
1359     dxva_h
1360     gsm_h
1361     io_h
1362     mach_mach_time_h
1363     machine_ioctl_bt848_h
1364     machine_ioctl_meteor_h
1365     malloc_h
1366     poll_h
1367     sndio_h
1368     soundcard_h
1369     sys_mman_h
1370     sys_param_h
1371     sys_resource_h
1372     sys_select_h
1373     sys_soundcard_h
1374     sys_time_h
1375     sys_un_h
1376     sys_videoio_h
1377     unistd_h
1378     windows_h
1379     winsock2_h
1380 "
1381
1382 MATH_FUNCS="
1383     atanf
1384     atan2f
1385     cbrtf
1386     cosf
1387     exp2
1388     exp2f
1389     expf
1390     isinf
1391     isnan
1392     ldexpf
1393     llrint
1394     llrintf
1395     log2
1396     log2f
1397     log10f
1398     lrint
1399     lrintf
1400     powf
1401     rint
1402     round
1403     roundf
1404     sinf
1405     trunc
1406     truncf
1407 "
1408
1409 SYSTEM_FUNCS="
1410     aligned_malloc
1411     closesocket
1412     CommandLineToArgvW
1413     CryptGenRandom
1414     dlopen
1415     fcntl
1416     flt_lim
1417     fork
1418     getaddrinfo
1419     gethrtime
1420     getopt
1421     GetProcessAffinityMask
1422     GetProcessMemoryInfo
1423     GetProcessTimes
1424     getrusage
1425     getservbyport
1426     GetSystemTimeAsFileTime
1427     gettimeofday
1428     inet_aton
1429     isatty
1430     jack_port_get_latency_range
1431     localtime_r
1432     mach_absolute_time
1433     MapViewOfFile
1434     memalign
1435     mkstemp
1436     mmap
1437     mprotect
1438     nanosleep
1439     posix_memalign
1440     sched_getaffinity
1441     SetConsoleTextAttribute
1442     setmode
1443     setrlimit
1444     Sleep
1445     strerror_r
1446     strptime
1447     sysconf
1448     sysctl
1449     usleep
1450     VirtualAlloc
1451 "
1452
1453 TOOLCHAIN_FEATURES="
1454     asm_mod_q
1455     attribute_may_alias
1456     attribute_packed
1457     ebp_available
1458     ebx_available
1459     gnu_as
1460     ibm_asm
1461     inline_asm_labels
1462     pragma_deprecated
1463     symver_asm_label
1464     symver_gnu_asm
1465     vfp_args
1466     xform_asm
1467     xmm_clobbers
1468 "
1469
1470 TYPES_LIST="
1471     socklen_t
1472     struct_addrinfo
1473     struct_group_source_req
1474     struct_ip_mreq_source
1475     struct_ipv6_mreq
1476     struct_pollfd
1477     struct_rusage_ru_maxrss
1478     struct_sockaddr_in6
1479     struct_sockaddr_sa_len
1480     struct_sockaddr_storage
1481     struct_v4l2_frmivalenum_discrete
1482 "
1483
1484 HAVE_LIST="
1485     $ARCH_EXT_LIST
1486     $(add_suffix _external $ARCH_EXT_LIST)
1487     $(add_suffix _inline   $ARCH_EXT_LIST)
1488     $ARCH_FEATURES
1489     $ATOMICS_LIST
1490     $BUILTIN_LIST
1491     $HAVE_LIST_CMDLINE
1492     $HAVE_LIST_PUB
1493     $HEADERS_LIST
1494     $MATH_FUNCS
1495     $SYSTEM_FUNCS
1496     $THREADS_LIST
1497     $TOOLCHAIN_FEATURES
1498     $TYPES_LIST
1499     atomics_native
1500     dos_paths
1501     libc_msvcrt
1502     libdc1394_1
1503     libdc1394_2
1504     sdl
1505     threads
1506     vdpau_x11
1507     xlib
1508 "
1509
1510 # options emitted with CONFIG_ prefix but not available on the command line
1511 CONFIG_EXTRA="
1512     aandcttables
1513     ac3dsp
1514     audio_frame_queue
1515     dsputil
1516     gcrypt
1517     golomb
1518     gplv3
1519     h263dsp
1520     h264chroma
1521     h264dsp
1522     h264pred
1523     h264qpel
1524     hpeldsp
1525     huffman
1526     intrax8
1527     lgplv3
1528     lpc
1529     mpegaudio
1530     mpegaudiodsp
1531     mpegvideo
1532     mpegvideoenc
1533     nettle
1534     rangecoder
1535     riffdec
1536     riffenc
1537     rtpdec
1538     rtpenc_chain
1539     sinewin
1540     tpeldsp
1541     videodsp
1542     vp3dsp
1543 "
1544
1545 CMDLINE_SELECT="
1546     $ARCH_EXT_LIST
1547     $CONFIG_LIST
1548     $HAVE_LIST_CMDLINE
1549     $THREADS_LIST
1550     asm
1551     cross_compile
1552     debug
1553     extra_warnings
1554     logging
1555     lto
1556     optimizations
1557 "
1558
1559 PATHS_LIST="
1560     bindir
1561     datadir
1562     docdir
1563     incdir
1564     libdir
1565     mandir
1566     prefix
1567     shlibdir
1568 "
1569
1570 CMDLINE_SET="
1571     $PATHS_LIST
1572     ar
1573     arch
1574     as
1575     build_suffix
1576     cc
1577     cpu
1578     cross_prefix
1579     dep_cc
1580     extra_version
1581     host_cc
1582     host_cflags
1583     host_ld
1584     host_ldflags
1585     host_libs
1586     host_os
1587     ld
1588     logfile
1589     malloc_prefix
1590     nm
1591     optflags
1592     pkg_config
1593     pkg_config_flags
1594     random_seed
1595     samples
1596     sysinclude
1597     sysroot
1598     target_exec
1599     target_os
1600     target_path
1601     target_samples
1602     toolchain
1603 "
1604
1605 CMDLINE_APPEND="
1606     extra_cflags
1607     host_cppflags
1608 "
1609
1610 # code dependency declarations
1611
1612 # architecture extensions
1613
1614 armv5te_deps="arm"
1615 armv6_deps="arm"
1616 armv6t2_deps="arm"
1617 neon_deps_any="aarch64 arm"
1618 vfp_deps_any="aarch64 arm"
1619 vfpv3_deps="vfp"
1620
1621 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1622
1623 altivec_deps="ppc"
1624 ppc4xx_deps="ppc"
1625
1626 cpunop_deps="i686"
1627 x86_64_select="i686"
1628 x86_64_suggest="fast_cmov"
1629
1630 amd3dnow_deps="mmx"
1631 amd3dnowext_deps="amd3dnow"
1632 i686_deps="x86"
1633 mmx_deps="x86"
1634 mmxext_deps="mmx"
1635 sse_deps="mmxext"
1636 sse2_deps="sse"
1637 sse3_deps="sse2"
1638 ssse3_deps="sse3"
1639 sse4_deps="ssse3"
1640 sse42_deps="sse4"
1641 avx_deps="sse42"
1642 xop_deps="avx"
1643 fma3_deps="avx"
1644 fma4_deps="avx"
1645 avx2_deps="avx"
1646
1647 mmx_external_deps="yasm"
1648 mmx_inline_deps="inline_asm"
1649 mmx_suggest="mmx_external mmx_inline"
1650
1651 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1652     eval dep=\$${ext}_deps
1653     eval ${ext}_external_deps='"${dep}_external"'
1654     eval ${ext}_inline_deps='"${dep}_inline"'
1655     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1656 done
1657
1658 aligned_stack_if_any="aarch64 ppc x86"
1659 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1660 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1661 fast_unaligned_if_any="aarch64 ppc x86"
1662
1663 need_memalign="altivec neon sse"
1664
1665 # system capabilities
1666 log2_deps="!libc_msvcrt"
1667
1668 symver_if_any="symver_asm_label symver_gnu_asm"
1669
1670 # threading support
1671 atomics_gcc_if="sync_val_compare_and_swap"
1672 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1673 atomics_win32_if="MemoryBarrier"
1674 atomics_native_if_any="$ATOMICS_LIST"
1675 w32threads_deps="atomics_native"
1676 threads_if_any="$THREADS_LIST"
1677
1678 # subsystems
1679 dct_select="rdft"
1680 error_resilience_select="dsputil"
1681 mdct_select="fft"
1682 rdft_select="fft"
1683 mpegaudio_select="mpegaudiodsp"
1684 mpegaudiodsp_select="dct"
1685 mpegvideo_select="dsputil hpeldsp videodsp"
1686 mpegvideoenc_select="dsputil mpegvideo"
1687
1688 # decoders / encoders
1689 aac_decoder_select="mdct sinewin"
1690 aac_encoder_select="audio_frame_queue mdct sinewin"
1691 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1692 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1693 ac3_encoder_select="mdct ac3dsp dsputil"
1694 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1695 aic_decoder_select="dsputil golomb"
1696 alac_encoder_select="lpc"
1697 als_decoder_select="dsputil"
1698 amrnb_decoder_select="lsp"
1699 amrwb_decoder_select="lsp"
1700 amv_decoder_select="sp5x_decoder"
1701 ape_decoder_select="dsputil"
1702 asv1_decoder_select="dsputil"
1703 asv1_encoder_select="dsputil"
1704 asv2_decoder_select="dsputil"
1705 asv2_encoder_select="dsputil"
1706 atrac1_decoder_select="mdct sinewin"
1707 atrac3_decoder_select="mdct"
1708 atrac3p_decoder_select="mdct sinewin"
1709 bink_decoder_select="dsputil hpeldsp"
1710 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
1711 binkaudio_rdft_decoder_select="mdct rdft sinewin"
1712 cavs_decoder_select="dsputil golomb h264chroma videodsp"
1713 cllc_decoder_select="dsputil"
1714 comfortnoise_encoder_select="lpc"
1715 cook_decoder_select="dsputil mdct sinewin"
1716 cscd_decoder_select="lzo"
1717 cscd_decoder_suggest="zlib"
1718 dca_decoder_select="mdct"
1719 dnxhd_decoder_select="dsputil"
1720 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
1721 dvvideo_decoder_select="dsputil"
1722 dvvideo_encoder_select="dsputil"
1723 dxa_decoder_deps="zlib"
1724 eac3_decoder_select="ac3_decoder"
1725 eac3_encoder_select="ac3_encoder"
1726 eamad_decoder_select="aandcttables dsputil mpegvideo"
1727 eatgq_decoder_select="aandcttables dsputil"
1728 eatqi_decoder_select="aandcttables dsputil error_resilience mpegvideo"
1729 ffv1_decoder_select="golomb rangecoder"
1730 ffv1_encoder_select="rangecoder"
1731 ffvhuff_decoder_select="huffyuv_decoder"
1732 ffvhuff_encoder_select="huffyuv_encoder"
1733 fic_decoder_select="dsputil golomb"
1734 flac_decoder_select="golomb"
1735 flac_encoder_select="dsputil golomb lpc"
1736 flashsv_decoder_deps="zlib"
1737 flashsv_encoder_deps="zlib"
1738 flashsv2_decoder_deps="zlib"
1739 flv_decoder_select="h263_decoder"
1740 flv_encoder_select="h263_encoder"
1741 fourxm_decoder_select="dsputil"
1742 fraps_decoder_select="dsputil huffman"
1743 g2m_decoder_deps="zlib"
1744 g2m_decoder_select="dsputil"
1745 h261_decoder_select="error_resilience mpegvideo"
1746 h261_encoder_select="aandcttables mpegvideoenc"
1747 h263_decoder_select="error_resilience h263_parser h263dsp mpegvideo"
1748 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1749 h263i_decoder_select="h263_decoder"
1750 h263p_encoder_select="h263_encoder"
1751 h264_decoder_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1752 h264_decoder_suggest="error_resilience"
1753 hevc_decoder_select="dsputil golomb videodsp"
1754 huffyuv_decoder_select="dsputil"
1755 huffyuv_encoder_select="dsputil huffman"
1756 iac_decoder_select="imc_decoder"
1757 imc_decoder_select="dsputil fft mdct sinewin"
1758 indeo3_decoder_select="hpeldsp"
1759 interplay_video_decoder_select="hpeldsp"
1760 jpegls_decoder_select="golomb mjpeg_decoder"
1761 jpegls_encoder_select="golomb"
1762 jv_decoder_select="dsputil"
1763 lagarith_decoder_select="dsputil"
1764 ljpeg_encoder_select="aandcttables mpegvideoenc"
1765 loco_decoder_select="golomb"
1766 mdec_decoder_select="dsputil error_resilience mpegvideo"
1767 metasound_decoder_select="lsp mdct sinewin"
1768 mimic_decoder_select="dsputil hpeldsp"
1769 mjpeg_decoder_select="dsputil hpeldsp"
1770 mjpeg_encoder_select="aandcttables mpegvideoenc"
1771 mjpegb_decoder_select="mjpeg_decoder"
1772 mlp_decoder_select="mlp_parser"
1773 motionpixels_decoder_select="dsputil"
1774 mp1_decoder_select="mpegaudio"
1775 mp1float_decoder_select="mpegaudio"
1776 mp2_decoder_select="mpegaudio"
1777 mp2float_decoder_select="mpegaudio"
1778 mp3_decoder_select="mpegaudio"
1779 mp3adu_decoder_select="mpegaudio"
1780 mp3adufloat_decoder_select="mpegaudio"
1781 mp3float_decoder_select="mpegaudio"
1782 mp3on4_decoder_select="mpegaudio"
1783 mp3on4float_decoder_select="mpegaudio"
1784 mpc7_decoder_select="dsputil mpegaudiodsp"
1785 mpc8_decoder_select="mpegaudiodsp"
1786 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1787 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1788 mpeg1video_decoder_select="error_resilience mpegvideo"
1789 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1790 mpeg2video_decoder_select="error_resilience mpegvideo"
1791 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1792 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1793 mpeg4_encoder_select="h263_encoder"
1794 msmpeg4v1_decoder_select="h263_decoder"
1795 msmpeg4v2_decoder_select="h263_decoder"
1796 msmpeg4v2_encoder_select="h263_encoder"
1797 msmpeg4v3_decoder_select="h263_decoder"
1798 msmpeg4v3_encoder_select="h263_encoder"
1799 mss2_decoder_select="error_resilience vc1_decoder"
1800 mxpeg_decoder_select="mjpeg_decoder"
1801 nellymoser_decoder_select="mdct sinewin"
1802 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1803 nuv_decoder_select="dsputil lzo"
1804 png_decoder_deps="zlib"
1805 png_encoder_deps="zlib"
1806 png_encoder_select="dsputil"
1807 prores_decoder_select="dsputil"
1808 prores_encoder_select="dsputil"
1809 qcelp_decoder_select="lsp"
1810 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1811 ra_144_encoder_select="audio_frame_queue lpc"
1812 ralf_decoder_select="golomb"
1813 rv10_decoder_select="error_resilience h263_decoder h263dsp"
1814 rv10_encoder_select="h263_encoder"
1815 rv20_decoder_select="error_resilience h263_decoder h263dsp"
1816 rv20_encoder_select="h263_encoder"
1817 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1818 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1819 shorten_decoder_select="golomb"
1820 sipr_decoder_select="lsp"
1821 sp5x_decoder_select="mjpeg_decoder"
1822 svq1_decoder_select="hpeldsp"
1823 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
1824 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
1825 svq3_decoder_suggest="zlib"
1826 tak_decoder_select="dsputil"
1827 theora_decoder_select="vp3_decoder"
1828 thp_decoder_select="mjpeg_decoder"
1829 tiff_decoder_suggest="zlib"
1830 tiff_encoder_suggest="zlib"
1831 truehd_decoder_select="mlp_decoder"
1832 truemotion2_decoder_select="dsputil"
1833 truespeech_decoder_select="dsputil"
1834 tscc_decoder_deps="zlib"
1835 twinvq_decoder_select="mdct lsp sinewin"
1836 utvideo_decoder_select="dsputil"
1837 utvideo_encoder_select="dsputil huffman"
1838 vble_decoder_select="dsputil"
1839 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel intrax8"
1840 vc1image_decoder_select="vc1_decoder"
1841 vorbis_decoder_select="mdct"
1842 vorbis_encoder_select="mdct"
1843 vp3_decoder_select="hpeldsp vp3dsp videodsp"
1844 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
1845 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
1846 vp6a_decoder_select="vp6_decoder"
1847 vp6f_decoder_select="vp6_decoder"
1848 vp8_decoder_select="h264pred videodsp"
1849 vp9_decoder_select="videodsp"
1850 webp_decoder_select="vp8_decoder"
1851 wmapro_decoder_select="mdct sinewin"
1852 wmav1_decoder_select="mdct sinewin"
1853 wmav1_encoder_select="mdct sinewin"
1854 wmav2_decoder_select="mdct sinewin"
1855 wmav2_encoder_select="mdct sinewin"
1856 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
1857 wmv1_decoder_select="h263_decoder"
1858 wmv1_encoder_select="h263_encoder"
1859 wmv2_decoder_select="h263_decoder intrax8 videodsp"
1860 wmv2_encoder_select="h263_encoder"
1861 wmv3_decoder_select="vc1_decoder"
1862 wmv3image_decoder_select="wmv3_decoder"
1863 zerocodec_decoder_deps="zlib"
1864 zlib_decoder_deps="zlib"
1865 zlib_encoder_deps="zlib"
1866 zmbv_decoder_deps="zlib"
1867 zmbv_encoder_deps="zlib"
1868
1869 # hardware accelerators
1870 dxva2_deps="dxva2api_h"
1871 vaapi_deps="va_va_h"
1872 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
1873 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
1874 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
1875
1876 h263_vaapi_hwaccel_deps="vaapi"
1877 h263_vaapi_hwaccel_select="h263_decoder"
1878 h263_vdpau_hwaccel_deps="vdpau"
1879 h263_vdpau_hwaccel_select="h263_decoder"
1880 h264_dxva2_hwaccel_deps="dxva2"
1881 h264_dxva2_hwaccel_select="h264_decoder"
1882 h264_vaapi_hwaccel_deps="vaapi"
1883 h264_vaapi_hwaccel_select="h264_decoder"
1884 h264_vda_hwaccel_deps="vda"
1885 h264_vda_hwaccel_select="h264_decoder"
1886 h264_vdpau_hwaccel_deps="vdpau"
1887 h264_vdpau_hwaccel_select="h264_decoder"
1888 mpeg1_vdpau_hwaccel_deps="vdpau"
1889 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
1890 mpeg2_dxva2_hwaccel_deps="dxva2"
1891 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
1892 mpeg2_vaapi_hwaccel_deps="vaapi"
1893 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
1894 mpeg2_vdpau_hwaccel_deps="vdpau"
1895 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
1896 mpeg4_vaapi_hwaccel_deps="vaapi"
1897 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
1898 mpeg4_vdpau_hwaccel_deps="vdpau"
1899 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
1900 vc1_dxva2_hwaccel_deps="dxva2"
1901 vc1_dxva2_hwaccel_select="vc1_decoder"
1902 vc1_vaapi_hwaccel_deps="vaapi"
1903 vc1_vaapi_hwaccel_select="vc1_decoder"
1904 vc1_vdpau_hwaccel_deps="vdpau"
1905 vc1_vdpau_hwaccel_select="vc1_decoder"
1906 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
1907 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
1908 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
1909
1910 # parsers
1911 h264_parser_select="h264_decoder"
1912 mpeg4video_parser_select="error_resilience h263dsp mpegvideo"
1913 mpegvideo_parser_select="error_resilience mpegvideo"
1914 vc1_parser_select="mpegvideo"
1915
1916 # external libraries
1917 libfaac_encoder_deps="libfaac"
1918 libfaac_encoder_select="audio_frame_queue"
1919 libfdk_aac_decoder_deps="libfdk_aac"
1920 libfdk_aac_encoder_deps="libfdk_aac"
1921 libfdk_aac_encoder_select="audio_frame_queue"
1922 libgsm_decoder_deps="libgsm"
1923 libgsm_encoder_deps="libgsm"
1924 libgsm_ms_decoder_deps="libgsm"
1925 libgsm_ms_encoder_deps="libgsm"
1926 libilbc_decoder_deps="libilbc"
1927 libilbc_encoder_deps="libilbc"
1928 libmp3lame_encoder_deps="libmp3lame"
1929 libmp3lame_encoder_select="audio_frame_queue"
1930 libopencore_amrnb_decoder_deps="libopencore_amrnb"
1931 libopencore_amrnb_encoder_deps="libopencore_amrnb"
1932 libopencore_amrnb_encoder_select="audio_frame_queue"
1933 libopencore_amrwb_decoder_deps="libopencore_amrwb"
1934 libopenjpeg_decoder_deps="libopenjpeg"
1935 libopenjpeg_encoder_deps="libopenjpeg"
1936 libopus_decoder_deps="libopus"
1937 libopus_encoder_deps="libopus"
1938 libopus_encoder_select="audio_frame_queue"
1939 libschroedinger_decoder_deps="libschroedinger"
1940 libschroedinger_encoder_deps="libschroedinger"
1941 libspeex_decoder_deps="libspeex"
1942 libspeex_encoder_deps="libspeex"
1943 libspeex_encoder_select="audio_frame_queue"
1944 libtheora_encoder_deps="libtheora"
1945 libvo_aacenc_encoder_deps="libvo_aacenc"
1946 libvo_aacenc_encoder_select="audio_frame_queue"
1947 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
1948 libvorbis_encoder_deps="libvorbis"
1949 libvorbis_encoder_select="audio_frame_queue"
1950 libvpx_vp8_decoder_deps="libvpx"
1951 libvpx_vp8_encoder_deps="libvpx"
1952 libvpx_vp9_decoder_deps="libvpx"
1953 libvpx_vp9_encoder_deps="libvpx"
1954 libwavpack_encoder_deps="libwavpack"
1955 libwebp_encoder_deps="libwebp"
1956 libx264_encoder_deps="libx264"
1957 libx265_encoder_deps="libx265"
1958 libxavs_encoder_deps="libxavs"
1959 libxvid_encoder_deps="libxvid"
1960
1961 # demuxers / muxers
1962 ac3_demuxer_select="ac3_parser"
1963 asf_demuxer_select="riffdec"
1964 asf_muxer_select="riffenc"
1965 asf_stream_muxer_select="asf_muxer"
1966 avi_demuxer_select="riffdec"
1967 avi_muxer_select="riffenc"
1968 avisynth_demuxer_deps="avisynth"
1969 avisynth_demuxer_select="riffdec"
1970 caf_demuxer_select="riffdec"
1971 dirac_demuxer_select="dirac_parser"
1972 dxa_demuxer_select="riffdec"
1973 eac3_demuxer_select="ac3_parser"
1974 f4v_muxer_select="mov_muxer"
1975 flac_demuxer_select="flac_parser"
1976 hds_muxer_select="flv_muxer"
1977 hls_muxer_select="mpegts_muxer"
1978 ipod_muxer_select="mov_muxer"
1979 ismv_muxer_select="mov_muxer"
1980 matroska_audio_muxer_select="matroska_muxer"
1981 matroska_demuxer_select="riffdec"
1982 matroska_demuxer_suggest="bzlib lzo zlib"
1983 matroska_muxer_select="riffenc"
1984 mmf_muxer_select="riffenc"
1985 mov_demuxer_select="riffdec"
1986 mov_demuxer_suggest="zlib"
1987 mov_muxer_select="riffenc rtpenc_chain"
1988 mp3_demuxer_select="mpegaudio_parser"
1989 mp4_muxer_select="mov_muxer"
1990 mpegts_muxer_select="adts_muxer latm_muxer"
1991 mpegtsraw_demuxer_select="mpegts_demuxer"
1992 mxf_d10_muxer_select="mxf_muxer"
1993 nut_muxer_select="riffenc"
1994 nuv_demuxer_select="riffdec"
1995 ogg_demuxer_select="golomb"
1996 psp_muxer_select="mov_muxer"
1997 rtp_demuxer_select="sdp_demuxer"
1998 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
1999 rtsp_demuxer_select="http_protocol rtpdec"
2000 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2001 sap_demuxer_select="sdp_demuxer"
2002 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2003 sdp_demuxer_select="rtpdec"
2004 smoothstreaming_muxer_select="ismv_muxer"
2005 spdif_muxer_select="aac_parser"
2006 tak_demuxer_select="tak_parser"
2007 tg2_muxer_select="mov_muxer"
2008 tgp_muxer_select="mov_muxer"
2009 w64_demuxer_select="wav_demuxer"
2010 wav_demuxer_select="riffdec"
2011 wav_muxer_select="riffenc"
2012 webm_muxer_select="riffenc"
2013 wtv_demuxer_select="riffdec"
2014 xmv_demuxer_select="riffdec"
2015 xwma_demuxer_select="riffdec"
2016
2017 # indevs / outdevs
2018 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2019 alsa_outdev_deps="alsa_asoundlib_h"
2020 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2021 dv1394_indev_deps="dv1394"
2022 dv1394_indev_select="dv_demuxer"
2023 fbdev_indev_deps="linux_fb_h"
2024 jack_indev_deps="jack_jack_h pthreads"
2025 libcdio_indev_deps="libcdio"
2026 libdc1394_indev_deps="libdc1394"
2027 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2028 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2029 pulse_indev_deps="libpulse"
2030 sndio_indev_deps="sndio_h"
2031 sndio_outdev_deps="sndio_h"
2032 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2033 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2034 vfwcap_indev_extralibs="-lavicap32"
2035 x11grab_indev_deps="x11grab XShmCreateImage"
2036
2037 # protocols
2038 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2039 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2040 ffrtmpcrypt_protocol_select="tcp_protocol"
2041 ffrtmphttp_protocol_deps="!librtmp_protocol"
2042 ffrtmphttp_protocol_select="http_protocol"
2043 gopher_protocol_select="network"
2044 http_protocol_select="tcp_protocol"
2045 httpproxy_protocol_select="tcp_protocol"
2046 https_protocol_select="tls_protocol"
2047 librtmp_protocol_deps="librtmp"
2048 librtmpe_protocol_deps="librtmp"
2049 librtmps_protocol_deps="librtmp"
2050 librtmpt_protocol_deps="librtmp"
2051 librtmpte_protocol_deps="librtmp"
2052 mmsh_protocol_select="http_protocol"
2053 mmst_protocol_select="network"
2054 rtmp_protocol_deps="!librtmp_protocol"
2055 rtmp_protocol_select="tcp_protocol"
2056 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2057 rtmps_protocol_deps="!librtmp_protocol"
2058 rtmps_protocol_select="tls_protocol"
2059 rtmpt_protocol_select="ffrtmphttp_protocol"
2060 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2061 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2062 rtp_protocol_select="udp_protocol"
2063 sctp_protocol_deps="struct_sctp_event_subscribe"
2064 sctp_protocol_select="network"
2065 srtp_protocol_select="rtp_protocol"
2066 tcp_protocol_select="network"
2067 tls_protocol_deps_any="openssl gnutls"
2068 tls_protocol_select="tcp_protocol"
2069 udp_protocol_select="network"
2070 unix_protocol_deps="sys_un_h"
2071 unix_protocol_select="network"
2072
2073 # filters
2074 blackframe_filter_deps="gpl"
2075 boxblur_filter_deps="gpl"
2076 cropdetect_filter_deps="gpl"
2077 delogo_filter_deps="gpl"
2078 drawtext_filter_deps="libfreetype"
2079 frei0r_filter_deps="frei0r dlopen"
2080 frei0r_filter_extralibs='$ldl'
2081 frei0r_src_filter_deps="frei0r dlopen"
2082 frei0r_src_filter_extralibs='$ldl'
2083 hqdn3d_filter_deps="gpl"
2084 interlace_filter_deps="gpl"
2085 ocv_filter_deps="libopencv"
2086 resample_filter_deps="avresample"
2087 scale_filter_deps="swscale"
2088
2089 # examples
2090 avcodec_example_deps="avcodec avutil"
2091 filter_audio_example_deps="avfilter avutil"
2092 metadata_example_deps="avformat avutil"
2093 output_example_deps="avcodec avformat avutil swscale"
2094 transcode_aac_example_deps="avcodec avformat avresample"
2095
2096 # libraries
2097 avcodec_deps="avutil"
2098 avdevice_deps="avutil avcodec avformat"
2099 avfilter_deps="avutil"
2100 avformat_deps="avutil avcodec"
2101 avresample_deps="avutil"
2102 swscale_deps="avutil"
2103
2104 # programs
2105 avconv_deps="avcodec avfilter avformat avresample swscale"
2106 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2107                fps_filter null_filter resample_filter scale_filter
2108                setpts_filter trim_filter"
2109 avplay_deps="avcodec avformat avresample swscale sdl"
2110 avplay_libs='$sdl_libs'
2111 avplay_select="rdft"
2112 avprobe_deps="avcodec avformat"
2113 avserver_deps="avformat fork !shared"
2114 avserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2115
2116 # documentation
2117 pod2man_deps="doc"
2118 texi2html_deps="doc"
2119
2120 # default parameters
2121
2122 logfile="config.log"
2123
2124 # installation paths
2125 prefix_default="/usr/local"
2126 bindir_default='${prefix}/bin'
2127 datadir_default='${prefix}/share/avconv'
2128 docdir_default='${prefix}/share/doc/libav'
2129 incdir_default='${prefix}/include'
2130 libdir_default='${prefix}/lib'
2131 mandir_default='${prefix}/share/man'
2132 shlibdir_default="$libdir_default"
2133
2134 # toolchain
2135 ar_default="ar"
2136 cc_default="gcc"
2137 host_cc_default="gcc"
2138 cp_f="cp -f"
2139 ln_s="ln -s -f"
2140 nm_default="nm -g"
2141 objformat="elf"
2142 pkg_config_default=pkg-config
2143 ranlib="ranlib"
2144 strip="strip"
2145 yasmexe="yasm"
2146
2147 nogas=":"
2148
2149 # machine
2150 arch_default=$(uname -m)
2151 cpu="generic"
2152
2153 # OS
2154 target_os_default=$(tolower $(uname -s))
2155 host_os=$target_os_default
2156
2157 # configurable options
2158 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2159
2160 enable asm
2161 enable debug
2162 enable doc
2163 enable optimizations
2164 enable safe_bitstream_reader
2165 enable static
2166 enable swscale_alpha
2167
2168 # By default, enable only those hwaccels that have no external dependencies.
2169 enable dxva2 vdpau
2170
2171 # build settings
2172 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2173 LIBPREF="lib"
2174 LIBSUF=".a"
2175 FULLNAME='$(NAME)$(BUILDSUF)'
2176 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2177 SLIBPREF="lib"
2178 SLIBSUF=".so"
2179 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2180 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2181 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2182 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2183 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2184 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2185
2186 asflags_filter=echo
2187 cflags_filter=echo
2188 ldflags_filter=echo
2189
2190 AS_C='-c'
2191 AS_O='-o $@'
2192 CC_C='-c'
2193 CC_E='-E -o $@'
2194 CC_O='-o $@'
2195 LD_O='-o $@'
2196 LD_LIB='-l%'
2197 LD_PATH='-L'
2198 HOSTCC_C='-c'
2199 HOSTCC_E='-E -o $@'
2200 HOSTCC_O='-o $@'
2201 HOSTLD_O='-o $@'
2202
2203 host_libs='-lm'
2204 host_cflags_filter=echo
2205 host_ldflags_filter=echo
2206
2207 target_path='$(CURDIR)'
2208
2209 # since the object filename is not given with the -MM flag, the compiler
2210 # is only able to print the basename, and we must add the path ourselves
2211 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2212 DEPFLAGS='-MM'
2213
2214 # find source path
2215 if test -f configure; then
2216     source_path=.
2217 else
2218     source_path=$(cd $(dirname "$0"); pwd)
2219     echo "$source_path" | grep -q '[[:blank:]]' &&
2220         die "Out of tree builds are impossible with whitespace in source path."
2221     test -e "$source_path/config.h" &&
2222         die "Out of tree builds are impossible with config.h in source dir."
2223 fi
2224
2225 for v in "$@"; do
2226     r=${v#*=}
2227     l=${v%"$r"}
2228     r=$(sh_quote "$r")
2229     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2230 done
2231
2232 find_things(){
2233     thing=$1
2234     pattern=$2
2235     file=$source_path/$3
2236     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2237 }
2238
2239 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2240 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2241 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2242 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2243 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2244 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2245 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2246 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2247 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2248 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2249 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2250
2251 ALL_COMPONENTS="
2252     $BSF_LIST
2253     $DECODER_LIST
2254     $DEMUXER_LIST
2255     $ENCODER_LIST
2256     $FILTER_LIST
2257     $HWACCEL_LIST
2258     $INDEV_LIST
2259     $MUXER_LIST
2260     $OUTDEV_LIST
2261     $PARSER_LIST
2262     $PROTOCOL_LIST
2263 "
2264
2265 for n in $COMPONENT_LIST; do
2266     v=$(toupper ${n%s})_LIST
2267     eval enable \$$v
2268     eval ${n}_if_any="\$$v"
2269 done
2270
2271 enable $ARCH_EXT_LIST
2272
2273 die_unknown(){
2274     echo "Unknown option \"$1\"."
2275     echo "See $0 --help for available options."
2276     exit 1
2277 }
2278
2279 print_3_columns() {
2280     cat | tr ' ' '\n' | sort | pr -r -3 -t
2281 }
2282
2283 show_list() {
2284     suffix=_$1
2285     shift
2286     echo $* | sed s/$suffix//g | print_3_columns
2287     exit 0
2288 }
2289
2290 rand_list(){
2291     IFS=', '
2292     set -- $*
2293     unset IFS
2294     for thing; do
2295         comp=${thing%:*}
2296         prob=${thing#$comp}
2297         prob=${prob#:}
2298         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2299         echo "prob ${prob:-0.5}"
2300         printf '%s\n' $comp
2301     done
2302 }
2303
2304 do_random(){
2305     action=$1
2306     shift
2307     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2308     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2309 }
2310
2311 for opt do
2312     optval="${opt#*=}"
2313     case "$opt" in
2314         --extra-ldflags=*)
2315             add_ldflags $optval
2316         ;;
2317         --extra-libs=*)
2318             add_extralibs $optval
2319         ;;
2320         --disable-devices)
2321             disable $INDEV_LIST $OUTDEV_LIST
2322         ;;
2323         --enable-debug=*)
2324             debuglevel="$optval"
2325         ;;
2326         --disable-programs)
2327             disable $PROGRAM_LIST
2328         ;;
2329         --disable-everything)
2330             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2331         ;;
2332         --disable-all)
2333             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2334             disable $LIBRARY_LIST $PROGRAM_LIST doc
2335         ;;
2336         --enable-random|--disable-random)
2337             action=${opt%%-random}
2338             do_random ${action#--} $COMPONENT_LIST
2339         ;;
2340         --enable-random=*|--disable-random=*)
2341             action=${opt%%-random=*}
2342             do_random ${action#--} $optval
2343         ;;
2344         --enable-*=*|--disable-*=*)
2345             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2346             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2347             eval list=\$$(toupper $thing)_LIST
2348             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2349             $action $(filter "$name" $list)
2350         ;;
2351         --enable-?*|--disable-?*)
2352             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2353             if is_in $option $COMPONENT_LIST; then
2354                 test $action = disable && action=unset
2355                 eval $action \$$(toupper ${option%s})_LIST
2356             elif is_in $option $CMDLINE_SELECT; then
2357                 $action $option
2358             else
2359                 die_unknown $opt
2360             fi
2361         ;;
2362         --list-*)
2363             NAME="${opt#--list-}"
2364             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2365             NAME=${NAME%s}
2366             eval show_list $NAME \$$(toupper $NAME)_LIST
2367         ;;
2368         --help|-h) show_help
2369         ;;
2370         *)
2371             optname="${opt%%=*}"
2372             optname="${optname#--}"
2373             optname=$(echo "$optname" | sed 's/-/_/g')
2374             if is_in $optname $CMDLINE_SET; then
2375                 eval $optname='$optval'
2376             elif is_in $optname $CMDLINE_APPEND; then
2377                 append $optname "$optval"
2378             else
2379                 die_unknown $opt
2380             fi
2381         ;;
2382     esac
2383 done
2384
2385 disabled logging && logfile=/dev/null
2386
2387 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2388 set >> $logfile
2389
2390 test -n "$cross_prefix" && enable cross_compile
2391
2392 if enabled cross_compile; then
2393     test -n "$arch" && test -n "$target_os" ||
2394         die "Must specify target arch and OS when cross-compiling"
2395 fi
2396
2397 ar_default="${cross_prefix}${ar_default}"
2398 cc_default="${cross_prefix}${cc_default}"
2399 nm_default="${cross_prefix}${nm_default}"
2400 pkg_config_default="${cross_prefix}${pkg_config_default}"
2401 ranlib="${cross_prefix}${ranlib}"
2402 strip="${cross_prefix}${strip}"
2403
2404 sysinclude_default="${sysroot}/usr/include"
2405
2406 case "$toolchain" in
2407     clang-asan)
2408         cc_default="clang"
2409         add_cflags  -fsanitize=address
2410         add_ldflags -fsanitize=address
2411     ;;
2412     clang-tsan)
2413         cc_default="clang"
2414         add_cflags  -fsanitize=thread -pie
2415         add_ldflags -fsanitize=thread -pie
2416     ;;
2417     clang-usan)
2418         cc_default="clang"
2419         add_cflags  -fsanitize=undefined
2420         add_ldflags -fsanitize=undefined
2421     ;;
2422     gcc-asan)
2423         cc_default="gcc"
2424         add_cflags  -fsanitize=address
2425         add_ldflags -fsanitize=address
2426     ;;
2427     gcc-tsan)
2428         cc_default="gcc"
2429         add_cflags  -fsanitize=thread -pie -fPIC
2430         add_ldflags -fsanitize=thread -pie -fPIC
2431     ;;
2432     gcc-usan)
2433         cc_default="gcc"
2434         add_cflags  -fsanitize=undefined
2435         add_ldflags -fsanitize=undefined
2436     ;;
2437     valgrind-massif)
2438         target_exec_default="valgrind"
2439         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2440     ;;
2441     valgrind-memcheck)
2442         target_exec_default="valgrind"
2443         target_exec_args="--track-origins=yes --leak-check=full"
2444     ;;
2445     msvc)
2446         # Check whether the current MSVC version needs the C99 converter.
2447         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2448         # support enough of C99 to build libav. Default to the new
2449         # behaviour if the regexp was unable to match anything, since this
2450         # successfully parses the version number of existing supported
2451         # versions that require the converter (MSVC 2010 and 2012).
2452         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2453         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2454             cc_default="cl"
2455         else
2456             cc_default="c99wrap cl"
2457         fi
2458         ld_default="link"
2459         nm_default="dumpbin -symbols"
2460         ar_default="lib"
2461         target_os_default="win32"
2462         # Use a relative path for TMPDIR. This makes sure all the
2463         # ffconf temp files are written with a relative path, avoiding
2464         # issues with msys/win32 path conversion for MSVC parameters
2465         # such as -Fo<file> or -out:<file>.
2466         TMPDIR=.
2467     ;;
2468     icl)
2469         cc_default="icl"
2470         ld_default="xilink"
2471         nm_default="dumpbin -symbols"
2472         ar_default="xilib"
2473         target_os_default="win32"
2474         TMPDIR=.
2475     ;;
2476     gcov)
2477         add_cflags  -fprofile-arcs -ftest-coverage
2478         add_ldflags -fprofile-arcs -ftest-coverage
2479     ;;
2480     hardened)
2481         add_cflags  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2482         add_ldflags -Wl,-z,relro -Wl,-z,now
2483     ;;
2484     ?*)
2485         die "Unknown toolchain $toolchain"
2486     ;;
2487 esac
2488
2489 set_default arch cc pkg_config sysinclude target_exec target_os
2490 enabled cross_compile || host_cc_default=$cc
2491 set_default host_cc
2492
2493 if ! $pkg_config --version >/dev/null 2>&1; then
2494     warn "$pkg_config not found, library detection may fail."
2495     pkg_config=false
2496 fi
2497
2498 exesuf() {
2499     case $1 in
2500         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2501     esac
2502 }
2503
2504 EXESUF=$(exesuf $target_os)
2505 HOSTEXESUF=$(exesuf $host_os)
2506
2507 # set temporary file name
2508 : ${TMPDIR:=$TEMPDIR}
2509 : ${TMPDIR:=$TMP}
2510 : ${TMPDIR:=/tmp}
2511
2512 if ! check_cmd mktemp -u XXXXXX; then
2513     # simple replacement for missing mktemp
2514     # NOT SAFE FOR GENERAL USE
2515     mktemp(){
2516         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2517     }
2518 fi
2519
2520 tmpfile(){
2521     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2522         (set -C; exec > $tmp) 2>/dev/null ||
2523         die "Unable to create temporary file in $TMPDIR."
2524     append TMPFILES $tmp
2525     eval $1=$tmp
2526 }
2527
2528 trap 'rm -f -- $TMPFILES' EXIT
2529
2530 tmpfile TMPASM .asm
2531 tmpfile TMPC   .c
2532 tmpfile TMPE   $EXESUF
2533 tmpfile TMPH   .h
2534 tmpfile TMPO   .o
2535 tmpfile TMPS   .S
2536 tmpfile TMPSH  .sh
2537 tmpfile TMPV   .ver
2538
2539 unset -f mktemp
2540
2541 chmod +x $TMPE
2542
2543 # make sure we can execute files in $TMPDIR
2544 cat > $TMPSH 2>> $logfile <<EOF
2545 #! /bin/sh
2546 EOF
2547 chmod +x $TMPSH >> $logfile 2>&1
2548 if ! $TMPSH >> $logfile 2>&1; then
2549     cat <<EOF
2550 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2551 variable to another directory and make sure that it is not mounted noexec.
2552 EOF
2553     die "Sanity test failed."
2554 fi
2555
2556 ccc_flags(){
2557     for flag; do
2558         case $flag in
2559             -std=c99)           echo -c99                       ;;
2560             -mcpu=*)            echo -arch ${flag#*=}           ;;
2561             -mieee)             echo -ieee                      ;;
2562             -O*|-fast)          echo $flag                      ;;
2563             -fno-math-errno)    echo -assume nomath_errno       ;;
2564             -g)                 echo -g3                        ;;
2565             -Wall)              echo -msg_enable level2         ;;
2566             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2567             -Wl,*)              echo $flag                      ;;
2568             -f*|-W*)                                            ;;
2569             *)                  echo $flag                      ;;
2570         esac
2571    done
2572 }
2573
2574 cparser_flags(){
2575     for flag; do
2576         case $flag in
2577             -Wno-switch)             echo -Wno-switch-enum ;;
2578             -Wno-format-zero-length) ;;
2579             -Wdisabled-optimization) ;;
2580             -Wno-pointer-sign)       echo -Wno-other ;;
2581             *)                       echo $flag ;;
2582         esac
2583     done
2584 }
2585
2586 msvc_common_flags(){
2587     for flag; do
2588         case $flag in
2589             # In addition to specifying certain flags under the compiler
2590             # specific filters, they must be specified here as well or else the
2591             # generic catch all at the bottom will print the original flag.
2592             -Wall)                ;;
2593             -std=c99)             ;;
2594             # Common flags
2595             -fomit-frame-pointer) ;;
2596             -g)                   echo -Z7 ;;
2597             -fno-math-errno)      ;;
2598             -fno-common)          ;;
2599             -fno-signed-zeros)    ;;
2600             -fPIC)                ;;
2601             -mthumb)              ;;
2602             -march=*)             ;;
2603             -lz)                  echo zlib.lib ;;
2604             -lavifil32)           echo vfw32.lib ;;
2605             -lavicap32)           echo vfw32.lib user32.lib ;;
2606             -l*)                  echo ${flag#-l}.lib ;;
2607             *)                    echo $flag ;;
2608         esac
2609     done
2610 }
2611
2612 msvc_flags(){
2613     msvc_common_flags "$@"
2614     for flag; do
2615         case $flag in
2616             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2617                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2618                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2619                                        -wd4273 ;;
2620         esac
2621     done
2622 }
2623
2624 icl_flags(){
2625     msvc_common_flags "$@"
2626     for flag; do
2627         case $flag in
2628             # Despite what Intel's documentation says -Wall, which is supported
2629             # on Windows, does enable remarks so disable them here.
2630             -Wall)                echo $flag -Qdiag-disable:remark ;;
2631             -std=c99)             echo -Qstd=c99 ;;
2632         esac
2633     done
2634 }
2635
2636 pgi_flags(){
2637     for flag; do
2638         case $flag in
2639             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2640             -fomit-frame-pointer) echo -Mnoframe ;;
2641             -g)                   echo -gopt ;;
2642             *)                    echo $flag ;;
2643         esac
2644     done
2645 }
2646
2647 suncc_flags(){
2648     for flag; do
2649         case $flag in
2650             -march=*|-mcpu=*)
2651                 case "${flag#*=}" in
2652                     native)                   echo -xtarget=native       ;;
2653                     v9|niagara)               echo -xarch=sparc          ;;
2654                     ultrasparc)               echo -xarch=sparcvis       ;;
2655                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2656                     i586|pentium)             echo -xchip=pentium        ;;
2657                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2658                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2659                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2660                     pentium4*)          echo -xtarget=pentium4           ;;
2661                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2662                     *-sse3)             echo -xarch=sse3                 ;;
2663                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2664                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2665                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2666                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2667                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2668                     k8|opteron|athlon64|athlon-fx)
2669                                                echo -xarch=sse2a         ;;
2670                     athlon*)                   echo -xarch=pentium_proa  ;;
2671                 esac
2672                 ;;
2673             -std=c99)             echo -xc99              ;;
2674             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2675             -fPIC)                echo -KPIC -xcode=pic32 ;;
2676             -W*,*)                echo $flag              ;;
2677             -f*-*|-W*|-mimpure-text)                      ;;
2678             -shared)              echo -G                 ;;
2679             *)                    echo $flag              ;;
2680         esac
2681     done
2682 }
2683
2684 tms470_flags(){
2685     for flag; do
2686         case $flag in
2687             -march=*|-mcpu=*)
2688                 case "${flag#*=}" in
2689                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2690                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2691                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2692                     armv6*|arm11*)          echo -mv=6   ;;
2693                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2694                                             echo -mv=5e  ;;
2695                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2696                 esac
2697                 ;;
2698             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2699             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2700             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2701             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2702             -msoft-float)   echo --float_support=vfplib       ;;
2703             -O[0-3]|-mf=*)  echo $flag                        ;;
2704             -g)             echo -g -mn                       ;;
2705             -pds=*)         echo $flag                        ;;
2706             -D*|-I*)        echo $flag                        ;;
2707             --gcc|--abi=*)  echo $flag                        ;;
2708             -me)            echo $flag                        ;;
2709         esac
2710     done
2711 }
2712
2713 probe_cc(){
2714     pfx=$1
2715     _cc=$2
2716
2717     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2718     unset _ld_o _ldflags _ld_lib _ld_path
2719     unset _depflags _DEPCMD _DEPFLAGS
2720     _flags_filter=echo
2721
2722     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2723         _type=llvm_gcc
2724         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
2725         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
2726         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2727         _cflags_speed='-O3'
2728         _cflags_size='-Os'
2729     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2730         _type=gcc
2731         gcc_version=$($_cc --version | head -n1)
2732         gcc_basever=$($_cc -dumpversion)
2733         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2734         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2735         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2736         if ! $_cc -dumpversion | grep -q '^2\.'; then
2737             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2738         fi
2739         _cflags_speed='-O3'
2740         _cflags_size='-Os'
2741     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2742         _type=icc
2743         _ident=$($_cc --version | head -n1)
2744         _depflags='-MMD'
2745         _cflags_speed='-O3'
2746         _cflags_size='-Os'
2747         _cflags_noopt='-O1'
2748     elif $_cc -v 2>&1 | grep -q xlc; then
2749         _type=xlc
2750         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2751         _cflags_speed='-O5'
2752         _cflags_size='-O5 -qcompact'
2753     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2754         _type=ccc
2755         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2756         _DEPFLAGS='-M'
2757         _cflags_speed='-fast'
2758         _cflags_size='-O1'
2759         _flags_filter=ccc_flags
2760     elif $_cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
2761         test -d "$sysroot" || die "No valid sysroot specified."
2762         _type=armcc
2763         _ident=$($_cc --vsn | head -n1)
2764         armcc_conf="$PWD/armcc.conf"
2765         $_cc --arm_linux_configure                 \
2766              --arm_linux_config_file="$armcc_conf" \
2767              --configure_sysroot="$sysroot"        \
2768              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
2769              die "Error creating armcc configuration file."
2770         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
2771         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
2772         as_default="${cross_prefix}gcc"
2773         _depflags='-MMD'
2774         _cflags_speed='-O3'
2775         _cflags_size='-Os'
2776     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
2777         _type=tms470
2778         _ident=$($_cc -version | head -n1 | tr -s ' ')
2779         _flags='--gcc --abi=eabi -me'
2780         _cc_e='-ppl -fe=$@'
2781         _cc_o='-fe=$@'
2782         _depflags='-ppa -ppd=$(@:.o=.d)'
2783         _cflags_speed='-O3 -mf=5'
2784         _cflags_size='-O3 -mf=2'
2785         _flags_filter=tms470_flags
2786     elif $_cc -v 2>&1 | grep -q clang; then
2787         _type=clang
2788         _ident=$($_cc --version | head -n1)
2789         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2790         _cflags_speed='-O3'
2791         _cflags_size='-Os'
2792     elif $_cc -V 2>&1 | grep -q Sun; then
2793         _type=suncc
2794         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
2795         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
2796         _DEPFLAGS='-xM1 -xc99'
2797         _ldflags='-std=c99'
2798         _cflags_speed='-O5'
2799         _cflags_size='-O5 -xspace'
2800         _flags_filter=suncc_flags
2801     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
2802         _type=pathscale
2803         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2804         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2805         _cflags_speed='-O2'
2806         _cflags_size='-Os'
2807         _flags_filter='filter_out -Wdisabled-optimization'
2808     elif $_cc -v 2>&1 | grep -q Open64; then
2809         _type=open64
2810         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2811         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2812         _cflags_speed='-O2'
2813         _cflags_size='-Os'
2814         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
2815     elif $_cc -V 2>&1 | grep -q Portland; then
2816         _type=pgi
2817         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
2818         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
2819         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
2820         _cflags_size="-O2 -Munroll=c:1 $opt_common"
2821         _cflags_noopt="-O1"
2822         _flags_filter=pgi_flags
2823     elif $_cc 2>&1 | grep -q Microsoft; then
2824         _type=msvc
2825         _ident=$($cc 2>&1 | head -n1)
2826         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
2827         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
2828         _cflags_speed="-O2"
2829         _cflags_size="-O1"
2830         if $_cc 2>&1 | grep -q Linker; then
2831             _ld_o='-out:$@'
2832         else
2833             _ld_o='-Fe$@'
2834         fi
2835         _cc_o='-Fo$@'
2836         _cc_e='-P -Fi$@'
2837         _flags_filter=msvc_flags
2838         _ld_lib='lib%.a'
2839         _ld_path='-libpath:'
2840         _flags='-nologo'
2841         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
2842         if [ $pfx = hostcc ]; then
2843             append _cflags -Dsnprintf=_snprintf
2844         fi
2845     elif $_cc 2>&1 | grep -q Intel; then
2846         _type=icl
2847         _ident=$($cc 2>&1 | head -n1)
2848         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
2849         # Not only is O3 broken on 13.x+ but it is slower on all previous
2850         # versions (tested) as well.
2851         _cflags_speed="-O2"
2852         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
2853         if $_cc 2>&1 | grep -q Linker; then
2854             _ld_o='-out:$@'
2855         else
2856             _ld_o='-Fe$@'
2857         fi
2858         _cc_o='-Fo$@'
2859         _cc_e='-P'
2860         _flags_filter=icl_flags
2861         _ld_lib='lib%.a'
2862         _ld_path='-libpath:'
2863         # -Qdiag-error to make icl error when seeing certain unknown arguments
2864         _flags='-nologo -Qdiag-error:4044,10157'
2865         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
2866         # with MSVC which enables it by default.
2867         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
2868         if [ $pfx = hostcc ]; then
2869             append _cflags -Dsnprintf=_snprintf
2870         fi
2871     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
2872         _type=cparser
2873         _ident=$($_cc --version | head -n1)
2874         _depflags='-MMD'
2875         _cflags_speed='-O4'
2876         _cflags_size='-O2'
2877         _flags_filter=cparser_flags
2878     fi
2879
2880     eval ${pfx}_type=\$_type
2881     eval ${pfx}_ident=\$_ident
2882 }
2883
2884 set_ccvars(){
2885     eval ${1}_C=\${_cc_c-\${${1}_C}}
2886     eval ${1}_E=\${_cc_e-\${${1}_E}}
2887     eval ${1}_O=\${_cc_o-\${${1}_O}}
2888
2889     if [ -n "$_depflags" ]; then
2890         eval ${1}_DEPFLAGS=\$_depflags
2891     else
2892         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
2893         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
2894         eval DEP${1}FLAGS=\$_flags
2895     fi
2896 }
2897
2898 probe_cc cc "$cc"
2899 cflags_filter=$_flags_filter
2900 cflags_speed=$_cflags_speed
2901 cflags_size=$_cflags_size
2902 cflags_noopt=$_cflags_noopt
2903 add_cflags $_flags $_cflags
2904 cc_ldflags=$_ldflags
2905 set_ccvars CC
2906
2907 probe_cc hostcc "$host_cc"
2908 host_cflags_filter=$_flags_filter
2909 add_host_cflags  $_flags $_cflags
2910 set_ccvars HOSTCC
2911
2912 test -n "$cc_type" && enable $cc_type ||
2913     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
2914
2915 : ${as_default:=$cc}
2916 : ${dep_cc_default:=$cc}
2917 : ${ld_default:=$cc}
2918 : ${host_ld_default:=$host_cc}
2919 set_default ar as dep_cc ld host_ld
2920
2921 probe_cc as "$as"
2922 asflags_filter=$_flags_filter
2923 add_asflags $_flags $_cflags
2924 set_ccvars AS
2925
2926 probe_cc ld "$ld"
2927 ldflags_filter=$_flags_filter
2928 add_ldflags $_flags $_ldflags
2929 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
2930 LD_O=${_ld_o-$LD_O}
2931 LD_LIB=${_ld_lib-$LD_LIB}
2932 LD_PATH=${_ld_path-$LD_PATH}
2933
2934 probe_cc hostld "$host_ld"
2935 host_ldflags_filter=$_flags_filter
2936 add_host_ldflags $_flags $_ldflags
2937 HOSTLD_O=${_ld_o-$HOSTLD_O}
2938
2939 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
2940     probe_cc depcc "$dep_cc"
2941     CCDEP=${_DEPCMD:-$DEPCMD}
2942     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
2943     DEPCCFLAGS=$_flags
2944 fi
2945
2946 if $ar 2>&1 | grep -q Microsoft; then
2947     arflags="-nologo"
2948     ar_o='-out:$@'
2949 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
2950     arflags="rq"
2951     ar_o='$@'
2952 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
2953     arflags='-Xany -r -c'
2954     ar_o='$@'
2955 else
2956     arflags="rc"
2957     ar_o='$@'
2958 fi
2959
2960 add_cflags $extra_cflags
2961 add_asflags $extra_cflags
2962
2963 if test -n "$sysroot"; then
2964     case "$cc_type" in
2965         gcc|llvm_gcc|clang)
2966             add_cppflags --sysroot="$sysroot"
2967             add_ldflags --sysroot="$sysroot"
2968         ;;
2969         tms470)
2970             add_cppflags -I"$sysinclude"
2971             add_ldflags  --sysroot="$sysroot"
2972         ;;
2973     esac
2974 fi
2975
2976 if test "$cpu" = host; then
2977     enabled cross_compile &&
2978         die "--cpu=host makes no sense when cross-compiling."
2979
2980     case "$cc_type" in
2981         gcc|llvm_gcc)
2982             check_native(){
2983                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
2984                 sed -n "/cc1.*$1=/{
2985                             s/.*$1=\\([^ ]*\\).*/\\1/
2986                             p
2987                             q
2988                         }" $TMPE
2989             }
2990             cpu=$(check_native -march || check_native -mcpu)
2991         ;;
2992     esac
2993
2994     test "${cpu:-host}" = host &&
2995         die "--cpu=host not supported with compiler $cc"
2996 fi
2997
2998 # Deal with common $arch aliases
2999 case "$arch" in
3000     aarch64|arm64)
3001         arch="aarch64"
3002     ;;
3003     arm*)
3004         arch="arm"
3005     ;;
3006     mips*|IP*)
3007         arch="mips"
3008     ;;
3009     parisc*|hppa*)
3010         arch="parisc"
3011     ;;
3012     "Power Macintosh"|ppc*|powerpc*)
3013         arch="ppc"
3014     ;;
3015     s390|s390x)
3016         arch="s390"
3017     ;;
3018     sh4|sh)
3019         arch="sh4"
3020     ;;
3021     sun4u|sparc*)
3022         arch="sparc"
3023     ;;
3024     tilegx|tile-gx)
3025         arch="tilegx"
3026     ;;
3027     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3028         arch="x86"
3029     ;;
3030 esac
3031
3032 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3033 enable $arch
3034
3035 # Add processor-specific flags
3036 if enabled aarch64; then
3037
3038     case $cpu in
3039         armv*)
3040             cpuflags="-march=$cpu"
3041         ;;
3042         *)
3043             cpuflags="-mcpu=$cpu"
3044         ;;
3045     esac
3046
3047 elif enabled alpha; then
3048
3049     cpuflags="-mcpu=$cpu"
3050
3051 elif enabled arm; then
3052
3053     check_arm_arch() {
3054         check_cpp_condition stddef.h \
3055             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3056             $cpuflags
3057     }
3058
3059     probe_arm_arch() {
3060         if   check_arm_arch 4;        then echo armv4;
3061         elif check_arm_arch 4T;       then echo armv4t;
3062         elif check_arm_arch 5;        then echo armv5;
3063         elif check_arm_arch 5E;       then echo armv5e;
3064         elif check_arm_arch 5T;       then echo armv5t;
3065         elif check_arm_arch 5TE;      then echo armv5te;
3066         elif check_arm_arch 5TEJ;     then echo armv5te;
3067         elif check_arm_arch 6;        then echo armv6;
3068         elif check_arm_arch 6J;       then echo armv6j;
3069         elif check_arm_arch 6K;       then echo armv6k;
3070         elif check_arm_arch 6Z;       then echo armv6z;
3071         elif check_arm_arch 6ZK;      then echo armv6zk;
3072         elif check_arm_arch 6T2;      then echo armv6t2;
3073         elif check_arm_arch 7;        then echo armv7;
3074         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3075         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3076         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3077         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3078         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3079         fi
3080     }
3081
3082     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3083
3084     case $cpu in
3085         armv*)
3086             cpuflags="-march=$cpu"
3087             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3088         ;;
3089         *)
3090             cpuflags="-mcpu=$cpu"
3091             case $cpu in
3092                 cortex-a*)                               subarch=armv7a  ;;
3093                 cortex-r*)                               subarch=armv7r  ;;
3094                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3095                 arm11*)                                  subarch=armv6   ;;
3096                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3097                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3098                 *)                             subarch=$(probe_arm_arch) ;;
3099             esac
3100         ;;
3101     esac
3102
3103     case "$subarch" in
3104         armv5t*)    enable fast_clz                ;;
3105         armv[6-8]*) enable fast_clz fast_unaligned ;;
3106     esac
3107
3108 elif enabled avr32; then
3109
3110     case $cpu in
3111         ap7[02]0[0-2])
3112             subarch="avr32_ap"
3113             cpuflags="-mpart=$cpu"
3114         ;;
3115         ap)
3116             subarch="avr32_ap"
3117             cpuflags="-march=$cpu"
3118         ;;
3119         uc3[ab]*)
3120             subarch="avr32_uc"
3121             cpuflags="-mcpu=$cpu"
3122         ;;
3123         uc)
3124             subarch="avr32_uc"
3125             cpuflags="-march=$cpu"
3126         ;;
3127     esac
3128
3129 elif enabled bfin; then
3130
3131     cpuflags="-mcpu=$cpu"
3132
3133 elif enabled mips; then
3134
3135     cpuflags="-march=$cpu"
3136
3137 elif enabled ppc; then
3138
3139     disable ldbrx
3140
3141     case $(tolower $cpu) in
3142         601|ppc601|powerpc601)
3143             cpuflags="-mcpu=601"
3144             disable altivec
3145         ;;
3146         603*|ppc603*|powerpc603*)
3147             cpuflags="-mcpu=603"
3148             disable altivec
3149         ;;
3150         604*|ppc604*|powerpc604*)
3151             cpuflags="-mcpu=604"
3152             disable altivec
3153         ;;
3154         g3|75*|ppc75*|powerpc75*)
3155             cpuflags="-mcpu=750"
3156             disable altivec
3157         ;;
3158         g4|745*|ppc745*|powerpc745*)
3159             cpuflags="-mcpu=7450"
3160         ;;
3161         74*|ppc74*|powerpc74*)
3162             cpuflags="-mcpu=7400"
3163         ;;
3164         g5|970|ppc970|powerpc970)
3165             cpuflags="-mcpu=970"
3166         ;;
3167         power[3-7]*)
3168             cpuflags="-mcpu=$cpu"
3169         ;;
3170         cell)
3171             cpuflags="-mcpu=cell"
3172             enable ldbrx
3173         ;;
3174         e500mc)
3175             cpuflags="-mcpu=e500mc"
3176             disable altivec
3177         ;;
3178         e500v2)
3179             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3180             disable altivec
3181         ;;
3182         e500)
3183             cpuflags="-mcpu=8540 -mhard-float"
3184             disable altivec
3185         ;;
3186     esac
3187
3188 elif enabled sparc; then
3189
3190     case $cpu in
3191         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3192             cpuflags="-mcpu=$cpu"
3193         ;;
3194         ultrasparc*|niagara[234])
3195             cpuflags="-mcpu=$cpu"
3196         ;;
3197     esac
3198
3199 elif enabled x86; then
3200
3201     case $cpu in
3202         i[345]86|pentium)
3203             cpuflags="-march=$cpu"
3204             disable mmx
3205         ;;
3206         # targets that do NOT support nopl and conditional mov (cmov)
3207         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3208             cpuflags="-march=$cpu"
3209             disable i686
3210         ;;
3211         # targets that do support nopl and conditional mov (cmov)
3212         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3213             cpuflags="-march=$cpu"
3214             enable i686
3215             enable fast_cmov
3216         ;;
3217         # targets that do support conditional mov but on which it's slow
3218         pentium4|pentium4m|prescott|nocona)
3219             cpuflags="-march=$cpu"
3220             enable i686
3221             disable fast_cmov
3222         ;;
3223     esac
3224
3225 fi
3226
3227 if [ "$cpu" != generic ]; then
3228     add_cflags  $cpuflags
3229     add_asflags $cpuflags
3230 fi
3231
3232 # compiler sanity check
3233 check_exec <<EOF
3234 int main(void){ return 0; }
3235 EOF
3236 if test "$?" != 0; then
3237     echo "$cc is unable to create an executable file."
3238     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3239         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3240         echo "Only do this if you know what cross compiling means."
3241     fi
3242     die "C compiler test failed."
3243 fi
3244
3245 add_cppflags -D_ISOC99_SOURCE
3246 check_cflags -std=c99
3247 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3248 #include <stdlib.h>
3249 EOF
3250 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3251 #include <stdlib.h>
3252 EOF
3253
3254 add_host_cppflags -D_ISOC99_SOURCE
3255 check_host_cflags -std=c99
3256 check_host_cflags -Wall
3257 check_host_cflags -O3
3258
3259 check_64bit(){
3260     arch32=$1
3261     arch64=$2
3262     expr=$3
3263     check_code cc "" "int test[2*($expr) - 1]" &&
3264         subarch=$arch64 || subarch=$arch32
3265 }
3266
3267 case "$arch" in
3268     aarch64|alpha|ia64)
3269         spic=$shared
3270     ;;
3271     mips)
3272         check_64bit mips mips64 '_MIPS_SIM > 1'
3273         spic=$shared
3274     ;;
3275     parisc)
3276         check_64bit parisc parisc64 'sizeof(void *) > 4'
3277         spic=$shared
3278     ;;
3279     ppc)
3280         check_64bit ppc ppc64 'sizeof(void *) > 4'
3281         spic=$shared
3282     ;;
3283     s390)
3284         check_64bit s390 s390x 'sizeof(void *) > 4'
3285         spic=$shared
3286     ;;
3287     sparc)
3288         check_64bit sparc sparc64 'sizeof(void *) > 4'
3289         spic=$shared
3290     ;;
3291     x86)
3292         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3293         if test "$subarch" = "x86_64"; then
3294             spic=$shared
3295         fi
3296     ;;
3297 esac
3298
3299 enable $subarch
3300 enabled spic && enable_weak pic
3301
3302 # OS specific
3303 case $target_os in
3304     aix)
3305         SHFLAGS=-shared
3306         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3307         enabled shared && add_ldflags -Wl,-brtl
3308         ;;
3309     haiku)
3310         prefix_default="/boot/common"
3311         network_extralibs="-lnetwork"
3312         host_libs=
3313         ;;
3314     sunos)
3315         SHFLAGS='-shared -Wl,-h,$$(@F)'
3316         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3317         network_extralibs="-lsocket -lnsl"
3318         # When using suncc to build, the Solaris linker will mark
3319         # an executable with each instruction set encountered by
3320         # the Solaris assembler.  As our libraries contain their own
3321         # guards for processor-specific code, instead suppress
3322         # generation of the HWCAPS ELF section on Solaris x86 only.
3323         enabled_all suncc x86 &&
3324             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3325             add_ldflags -Wl,-M,mapfile
3326         nm_default='nm -P -g'
3327         ;;
3328     netbsd)
3329         disable symver
3330         oss_indev_extralibs="-lossaudio"
3331         oss_outdev_extralibs="-lossaudio"
3332         ;;
3333     openbsd|bitrig)
3334         disable symver
3335         SHFLAGS='-shared'
3336         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3337         SLIB_INSTALL_LINKS=
3338         oss_indev_extralibs="-lossaudio"
3339         oss_outdev_extralibs="-lossaudio"
3340         ;;
3341     dragonfly)
3342         disable symver
3343         ;;
3344     freebsd)
3345         ;;
3346     bsd/os)
3347         add_extralibs -lpoll -lgnugetopt
3348         ;;
3349     darwin)
3350         gas="gas-preprocessor.pl $cc"
3351         enabled ppc && add_asflags -force_cpusubtype_ALL
3352         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3353         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3354         add_ldflags -Wl,-dynamic,-search_paths_first
3355         SLIBSUF=".dylib"
3356         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3357         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3358         objformat="macho"
3359         enabled x86_64 && objformat="macho64"
3360         enabled_any pic shared ||
3361             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3362         ;;
3363     mingw32*)
3364         if test $target_os = "mingw32ce"; then
3365             disable network
3366         else
3367             target_os=mingw32
3368         fi
3369         LIBTARGET=i386
3370         if enabled x86_64; then
3371             LIBTARGET="i386:x86-64"
3372         elif enabled arm; then
3373             LIBTARGET=arm-wince
3374         fi
3375         check_ldflags -Wl,--nxcompat
3376         check_ldflags -Wl,--dynamicbase
3377         shlibdir_default="$bindir_default"
3378         SLIBPREF=""
3379         SLIBSUF=".dll"
3380         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3381         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3382         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3383         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3384         SLIB_INSTALL_LINKS=
3385         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3386         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3387         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3388         objformat="win32"
3389         dlltool="${cross_prefix}dlltool"
3390         ranlib=:
3391         enable dos_paths
3392         ;;
3393     win32|win64)
3394         disable symver
3395         if enabled shared; then
3396             # Link to the import library instead of the normal static library
3397             # for shared libs.
3398             LD_LIB='%.lib'
3399             # Cannot build both shared and static libs with MSVC or icl.
3400             disable static
3401         fi
3402         shlibdir_default="$bindir_default"
3403         SLIBPREF=""
3404         SLIBSUF=".dll"
3405         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3406         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3407         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3408         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3409         SLIB_INSTALL_LINKS=
3410         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3411         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3412         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3413         objformat="win32"
3414         ranlib=:
3415         enable dos_paths
3416         ;;
3417     cygwin*)
3418         target_os=cygwin
3419         shlibdir_default="$bindir_default"
3420         SLIBPREF="cyg"
3421         SLIBSUF=".dll"
3422         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3423         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3424         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3425         SLIB_INSTALL_LINKS=
3426         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3427         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3428         objformat="win32"
3429         enable dos_paths
3430         ;;
3431     *-dos|freedos|opendos)
3432         network_extralibs="-lsocket"
3433         objformat="coff"
3434         enable dos_paths
3435         add_cppflags -U__STRICT_ANSI__
3436         ;;
3437     linux)
3438         enable dv1394
3439         ;;
3440     irix*)
3441         target_os=irix
3442         ranlib="echo ignoring ranlib"
3443         ;;
3444     os/2*)
3445         ln_s="cp -f"
3446         objformat="aout"
3447         add_cppflags -D_GNU_SOURCE
3448         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3449         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3450         LIBSUF="_s.a"
3451         SLIBPREF=""
3452         SLIBSUF=".dll"
3453         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3454         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3455         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3456             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3457             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3458             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3459             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3460             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3461         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3462             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3463         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3464         enable dos_paths
3465         ;;
3466     gnu/kfreebsd)
3467         add_cppflags -D_BSD_SOURCE
3468         ;;
3469     gnu)
3470         ;;
3471     qnx)
3472         add_cppflags -D_QNX_SOURCE
3473         network_extralibs="-lsocket"
3474         ;;
3475     symbian)
3476         SLIBSUF=".dll"
3477         enable dos_paths
3478         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3479         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3480         add_ldflags -Wl,--target1-abs,--no-undefined \
3481                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3482                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3483         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3484                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3485                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3486         ;;
3487     osf1)
3488         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3489         ;;
3490     minix)
3491         ;;
3492     plan9)
3493         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3494                      -D_REENTRANT_SOURCE        \
3495                      -D_RESEARCH_SOURCE         \
3496                      -DFD_SETSIZE=96            \
3497                      -DHAVE_SOCK_OPTS
3498         add_compat strtod.o strtod=avpriv_strtod
3499         network_extralibs='-lbsd'
3500         exeobjs=compat/plan9/main.o
3501         disable avserver
3502         cp_f='cp'
3503         ;;
3504     none)
3505         ;;
3506     *)
3507         die "Unknown OS '$target_os'."
3508         ;;
3509 esac
3510
3511 # determine libc flavour
3512
3513 probe_libc(){
3514     pfx=$1
3515     pfx_no_=${pfx%_}
3516     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3517     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3518         eval ${pfx}libc_type=uclibc
3519         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3520     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3521         eval ${pfx}libc_type=glibc
3522         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3523     # MinGW headers can be installed on Cygwin, so check for newlib first.
3524     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3525         eval ${pfx}libc_type=newlib
3526         add_${pfx}cppflags -U__STRICT_ANSI__
3527     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3528     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3529         eval ${pfx}libc_type=mingw64
3530         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3531         eval test \$${pfx_no_}cc_type = "gcc" &&
3532             add_${pfx}cppflags -D__printf__=__gnu_printf__
3533     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3534          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3535         eval ${pfx}libc_type=mingw32
3536         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3537             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3538             die "ERROR: MinGW32 runtime version must be >= 3.15."
3539         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3540         eval test \$${pfx_no_}cc_type = "gcc" &&
3541             add_${pfx}cppflags -D__printf__=__gnu_printf__
3542     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3543         eval ${pfx}libc_type=msvcrt
3544         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3545         # 0x601 by default unless something else is set by the user.
3546         # This can easily lead to us detecting functions only present
3547         # in such new versions and producing binaries requiring windows 7.0.
3548         # Therefore explicitly set the default to XP unless the user has
3549         # set something else on the command line.
3550         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3551             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
3552     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3553         eval ${pfx}libc_type=klibc
3554     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3555         eval ${pfx}libc_type=bionic
3556     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3557         eval ${pfx}libc_type=solaris
3558         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3559     fi
3560 }
3561
3562 probe_libc
3563 test -n "$libc_type" && enable libc_$libc_type
3564 probe_libc host_
3565 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3566
3567 case $libc_type in
3568     bionic)
3569         add_compat strtod.o strtod=avpriv_strtod
3570         ;;
3571     msvcrt)
3572         add_compat strtod.o strtod=avpriv_strtod
3573         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3574                                      _snprintf=avpriv_snprintf  \
3575                                      vsnprintf=avpriv_vsnprintf
3576         ;;
3577 esac
3578
3579 # hacks for compiler/libc/os combinations
3580
3581 if enabled_all tms470 libc_glibc; then
3582     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3583     add_cppflags -D__USER_LABEL_PREFIX__=
3584     add_cppflags -D__builtin_memset=memset
3585     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3586     add_cflags   -pds=48    # incompatible redefinition of macro
3587 fi
3588
3589 if enabled_all ccc libc_glibc; then
3590     add_ldflags -Wl,-z,now  # calls to libots crash without this
3591 fi
3592
3593 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3594     add_cppflags '-I\$(SRC_PATH)/compat/float'
3595
3596 esc(){
3597     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3598 }
3599
3600 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3601
3602 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3603
3604 set_default $PATHS_LIST
3605 set_default nm
3606
3607 # we need to build at least one lib type
3608 if ! enabled_any static shared; then
3609     cat <<EOF
3610 At least one library type must be built.
3611 Specify --enable-static to build the static libraries or --enable-shared to
3612 build the shared libraries as well. To only build the shared libraries specify
3613 --disable-static in addition to --enable-shared.
3614 EOF
3615     exit 1;
3616 fi
3617
3618 die_license_disabled() {
3619     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3620 }
3621
3622 die_license_disabled gpl libcdio
3623 die_license_disabled gpl libx264
3624 die_license_disabled gpl libx265
3625 die_license_disabled gpl libxavs
3626 die_license_disabled gpl libxvid
3627 die_license_disabled gpl x11grab
3628
3629 die_license_disabled nonfree libfaac
3630 die_license_disabled nonfree libfdk_aac
3631 die_license_disabled nonfree openssl
3632
3633 die_license_disabled version3 libopencore_amrnb
3634 die_license_disabled version3 libopencore_amrwb
3635 die_license_disabled version3 libvo_aacenc
3636 die_license_disabled version3 libvo_amrwbenc
3637
3638 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3639
3640 disabled optimizations || check_cflags -fomit-frame-pointer
3641
3642 enable_weak_pic() {
3643     disabled pic && return
3644     enable pic
3645     add_cppflags -DPIC
3646     case "$target_os" in
3647     mingw*|cygwin*)
3648         ;;
3649     *)
3650         add_cflags -fPIC
3651         ;;
3652     esac
3653     add_asflags  -fPIC
3654 }
3655
3656 enabled pic && enable_weak_pic
3657
3658 check_cc <<EOF || die "Symbol mangling check failed."
3659 int ff_extern;
3660 EOF
3661 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3662 extern_prefix=${sym%%ff_extern*}
3663
3664 check_cc <<EOF && enable_weak inline_asm
3665 void foo(void) { __asm__ volatile ("" ::); }
3666 EOF
3667
3668 _restrict=
3669 for restrict_keyword in restrict __restrict__ __restrict; do
3670     check_cc <<EOF && _restrict=$restrict_keyword && break
3671 void foo(char * $restrict_keyword p);
3672 EOF
3673 done
3674
3675 check_cc <<EOF && enable pragma_deprecated
3676 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3677 EOF
3678
3679 check_cc <<EOF && enable attribute_packed
3680 struct { int x; } __attribute__((packed)) x;
3681 EOF
3682
3683 check_cc <<EOF && enable attribute_may_alias
3684 union { int x; } __attribute__((may_alias)) x;
3685 EOF
3686
3687 check_cc <<EOF || die "endian test failed"
3688 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3689 EOF
3690 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3691
3692 check_inline_asm inline_asm_labels '"1:\n"'
3693
3694 if enabled aarch64; then
3695     # internal assembler in clang 3.3 does not support this instruction
3696     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
3697     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
3698
3699     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
3700
3701 elif enabled alpha; then
3702
3703     check_cflags -mieee
3704
3705 elif enabled arm; then
3706
3707     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
3708     enabled thumb && check_cflags -mthumb || check_cflags -marm
3709     nogas=die
3710
3711     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
3712         enable vfp_args
3713     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
3714         case "${cross_prefix:-$cc}" in
3715             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
3716             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
3717 __asm__ (".eabi_attribute 28, 1");
3718 int main(void) { return 0; }
3719 EOF
3720         esac
3721         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
3722     fi
3723
3724     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
3725     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
3726     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
3727     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
3728     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
3729     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
3730
3731     [ $target_os = linux ] ||
3732         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
3733             $ARCH_EXT_LIST_ARM
3734
3735     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
3736
3737     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
3738
3739 elif enabled mips; then
3740
3741     check_inline_asm loongson '"dmult.g $1, $2, $3"'
3742
3743 elif enabled parisc; then
3744
3745     if enabled gcc; then
3746         case $($cc -dumpversion) in
3747             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
3748         esac
3749     fi
3750
3751 elif enabled ppc; then
3752
3753     enable local_aligned_8 local_aligned_16
3754
3755     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
3756     check_inline_asm ibm_asm   '"add 0, 0, 0"'
3757     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
3758     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
3759
3760     # AltiVec flags: The FSF version of GCC differs from the Apple version
3761     if enabled altivec; then
3762         nogas=warn
3763         check_cflags -maltivec -mabi=altivec &&
3764         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
3765         check_cflags -faltivec
3766
3767         # check if our compiler supports Motorola AltiVec C API
3768         check_cc <<EOF || disable altivec
3769 $inc_altivec_h
3770 int main(void) {
3771     vector signed int v1 = (vector signed int) { 0 };
3772     vector signed int v2 = (vector signed int) { 1 };
3773     v1 = vec_add(v1, v2);
3774     return 0;
3775 }
3776 EOF
3777
3778         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
3779     fi
3780
3781 elif enabled x86; then
3782
3783     check_builtin rdtsc    intrin.h   "__rdtsc()"
3784     check_builtin mm_empty mmintrin.h "_mm_empty()"
3785
3786     enable local_aligned_8 local_aligned_16
3787
3788     # check whether EBP is available on x86
3789     # As 'i' is stored on the stack, this program will crash
3790     # if the base pointer is used to access it because the
3791     # base pointer is cleared in the inline assembly code.
3792     check_exec_crash <<EOF && enable ebp_available
3793 volatile int i=0;
3794 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
3795 return i;
3796 EOF
3797
3798     # check whether EBX is available on x86
3799     check_inline_asm ebx_available '""::"b"(0)' &&
3800         check_inline_asm ebx_available '"":::"%ebx"'
3801
3802     # check whether xmm clobbers are supported
3803     check_inline_asm xmm_clobbers '"":::"%xmm0"'
3804
3805     # check whether binutils is new enough to compile SSSE3/MMXEXT
3806     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
3807     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
3808
3809     if ! disabled_any asm mmx yasm; then
3810         if check_cmd $yasmexe --version; then
3811             enabled x86_64 && yasm_extra="-m amd64"
3812             yasm_debug="-g dwarf2"
3813         elif check_cmd nasm -v; then
3814             yasmexe=nasm
3815             yasm_debug="-g -F dwarf"
3816             enabled x86_64 && test "$objformat" = elf && objformat=elf64
3817         fi
3818
3819         YASMFLAGS="-f $objformat $yasm_extra"
3820         enabled pic               && append YASMFLAGS "-DPIC"
3821         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
3822         case "$objformat" in
3823             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
3824         esac
3825
3826         check_yasm "movbe ecx, [5]" && enable yasm ||
3827             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
3828         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
3829         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
3830         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
3831         check_yasm "CPU amdnop" || disable cpunop
3832     fi
3833
3834     case "$cpu" in
3835         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
3836             disable fast_clz
3837         ;;
3838     esac
3839
3840 fi
3841
3842 if enabled asm; then
3843     as=${gas:=$as}
3844     check_as <<EOF && enable gnu_as || \
3845         $nogas "GNU assembler not found, install gas-preprocessor"
3846 .macro m n
3847 \n: .int 0
3848 .endm
3849 m x
3850 EOF
3851 fi
3852
3853 check_ldflags -Wl,--as-needed
3854
3855 if check_func dlopen; then
3856     ldl=
3857 elif check_func dlopen -ldl; then
3858     ldl=-ldl
3859 fi
3860
3861 if ! disabled network; then
3862     check_func getaddrinfo $network_extralibs
3863     check_func getservbyport $network_extralibs
3864     check_func inet_aton $network_extralibs
3865
3866     check_type netdb.h "struct addrinfo"
3867     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
3868     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
3869     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
3870     check_type poll.h "struct pollfd"
3871     check_type netinet/sctp.h "struct sctp_event_subscribe"
3872     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
3873     check_type netinet/in.h "struct sockaddr_in6"
3874     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
3875     check_type "sys/types.h sys/socket.h" socklen_t
3876
3877     # Prefer arpa/inet.h over winsock2
3878     if check_header arpa/inet.h ; then
3879         check_func closesocket
3880     elif check_header winsock2.h ; then
3881         check_func_headers winsock2.h closesocket -lws2 &&
3882             network_extralibs="-lws2" ||
3883         { check_func_headers winsock2.h closesocket -lws2_32 &&
3884             network_extralibs="-lws2_32"; } || disable winsock2_h network
3885         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
3886
3887         check_type ws2tcpip.h socklen_t
3888         check_type ws2tcpip.h "struct addrinfo"
3889         check_type ws2tcpip.h "struct group_source_req"
3890         check_type ws2tcpip.h "struct ip_mreq_source"
3891         check_type ws2tcpip.h "struct ipv6_mreq"
3892         check_type winsock2.h "struct pollfd"
3893         check_struct winsock2.h "struct sockaddr" sa_len
3894         check_type ws2tcpip.h "struct sockaddr_in6"
3895         check_type ws2tcpip.h "struct sockaddr_storage"
3896     else
3897         disable network
3898     fi
3899 fi
3900
3901 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
3902 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
3903 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
3904 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
3905
3906 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
3907 check_func  ${malloc_prefix}memalign            && enable memalign
3908 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
3909
3910 check_func  fcntl
3911 check_func  fork
3912 check_func  gethrtime
3913 check_func  getopt
3914 check_func  getrusage
3915 check_func  gettimeofday
3916 check_func  isatty
3917 check_func  localtime_r
3918 check_func  mach_absolute_time
3919 check_func  mkstemp
3920 check_func  mmap
3921 check_func  mprotect
3922 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
3923 check_func  nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
3924 check_func  sched_getaffinity
3925 check_func  setrlimit
3926 check_func  strerror_r
3927 check_func  strptime
3928 check_func  sysconf
3929 check_func  sysctl
3930 check_func  usleep
3931
3932 check_func_headers io.h setmode
3933 check_func_headers stdlib.h getenv
3934
3935 check_func_headers windows.h GetProcessAffinityMask
3936 check_func_headers windows.h GetProcessTimes
3937 check_func_headers windows.h GetSystemTimeAsFileTime
3938 check_func_headers windows.h MapViewOfFile
3939 check_func_headers windows.h SetConsoleTextAttribute
3940 check_func_headers windows.h Sleep
3941 check_func_headers windows.h VirtualAlloc
3942
3943 check_header direct.h
3944 check_header dlfcn.h
3945 check_header dxva.h
3946 check_header dxva2api.h
3947 check_header io.h
3948 check_header mach/mach_time.h
3949 check_header malloc.h
3950 check_header poll.h
3951 check_header sys/mman.h
3952 check_header sys/param.h
3953 check_header sys/resource.h
3954 check_header sys/select.h
3955 check_header sys/time.h
3956 check_header sys/un.h
3957 check_header unistd.h
3958 check_header vdpau/vdpau.h
3959 check_header vdpau/vdpau_x11.h
3960 check_header VideoDecodeAcceleration/VDADecoder.h
3961 check_header windows.h
3962 check_header X11/extensions/XvMClib.h
3963
3964 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
3965 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
3966 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
3967
3968 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
3969
3970 if ! disabled w32threads && ! enabled pthreads; then
3971     check_func_headers "windows.h process.h" _beginthreadex &&
3972         enable w32threads || disable w32threads
3973 fi
3974
3975 # check for some common methods of building with pthread support
3976 # do this before the optional library checks as some of them require pthreads
3977 if ! disabled pthreads && ! enabled w32threads; then
3978     enable pthreads
3979     if check_func pthread_join -pthread; then
3980         add_cflags -pthread
3981         add_extralibs -pthread
3982     elif check_func pthread_join -pthreads; then
3983         add_cflags -pthreads
3984         add_extralibs -pthreads
3985     elif check_func pthread_join -lpthreadGC2; then
3986         add_extralibs -lpthreadGC2
3987     elif check_lib pthread.h pthread_join -lpthread; then
3988         :
3989     elif ! check_func pthread_join; then
3990         disable pthreads
3991     fi
3992 fi
3993
3994 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
3995 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
3996
3997 check_lib math.h sin -lm && LIBM="-lm"
3998 enabled vaapi && require vaapi va/va.h vaInitialize -lva
3999
4000 atan2f_args=2
4001 ldexpf_args=2
4002 powf_args=2
4003
4004 for func in $MATH_FUNCS; do
4005     eval check_mathfunc $func \${${func}_args:-1}
4006 done
4007
4008 # these are off by default, so fail if requested and not available
4009 enabled avisynth          && { { check_header "avisynth/avisynth_c.h" && check_lib2 "windows.h" LoadLibrary; } ||
4010                                { check_header "avxsynth/avxsynth_c.h" && check_lib2 "dlfcn.h" dlopen -ldl; } ||
4011                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4012 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4013 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4014 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4015 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
4016 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4017 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4018                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4019                                done || die "ERROR: libgsm not found"; }
4020 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4021 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4022 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4023 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4024 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4025 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4026                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4027 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4028 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4029 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4030 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4031 enabled libspeex          && require libspeex speex/speex.h speex_decoder_init -lspeex
4032 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4033 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4034 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4035 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4036 enabled libvpx            && {
4037     enabled libvpx_vp8_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
4038                                     die "ERROR: libvpx decoder version must be >=0.9.1"; }
4039     enabled libvpx_vp8_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_enc_init_ver VPX_CQ" -lvpx ||
4040                                     die "ERROR: libvpx encoder version must be >=0.9.6"; }
4041     enabled libvpx_vp9_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx" -lvpx || disable libvpx_vp9_decoder; }
4042     enabled libvpx_vp9_en