b687790af00594aa22702edf545f125f98f359e4
[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     videodsp
1541     vp3dsp
1542 "
1543
1544 CMDLINE_SELECT="
1545     $ARCH_EXT_LIST
1546     $CONFIG_LIST
1547     $HAVE_LIST_CMDLINE
1548     $THREADS_LIST
1549     asm
1550     cross_compile
1551     debug
1552     extra_warnings
1553     logging
1554     lto
1555     optimizations
1556 "
1557
1558 PATHS_LIST="
1559     bindir
1560     datadir
1561     docdir
1562     incdir
1563     libdir
1564     mandir
1565     prefix
1566     shlibdir
1567 "
1568
1569 CMDLINE_SET="
1570     $PATHS_LIST
1571     ar
1572     arch
1573     as
1574     build_suffix
1575     cc
1576     cpu
1577     cross_prefix
1578     dep_cc
1579     extra_version
1580     host_cc
1581     host_cflags
1582     host_ld
1583     host_ldflags
1584     host_libs
1585     host_os
1586     ld
1587     logfile
1588     malloc_prefix
1589     nm
1590     optflags
1591     pkg_config
1592     pkg_config_flags
1593     random_seed
1594     samples
1595     sysinclude
1596     sysroot
1597     target_exec
1598     target_os
1599     target_path
1600     target_samples
1601     toolchain
1602 "
1603
1604 CMDLINE_APPEND="
1605     extra_cflags
1606     host_cppflags
1607 "
1608
1609 # code dependency declarations
1610
1611 # architecture extensions
1612
1613 armv5te_deps="arm"
1614 armv6_deps="arm"
1615 armv6t2_deps="arm"
1616 neon_deps_any="aarch64 arm"
1617 vfp_deps_any="aarch64 arm"
1618 vfpv3_deps="vfp"
1619
1620 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1621
1622 altivec_deps="ppc"
1623 ppc4xx_deps="ppc"
1624
1625 cpunop_deps="i686"
1626 x86_64_select="i686"
1627 x86_64_suggest="fast_cmov"
1628
1629 amd3dnow_deps="mmx"
1630 amd3dnowext_deps="amd3dnow"
1631 i686_deps="x86"
1632 mmx_deps="x86"
1633 mmxext_deps="mmx"
1634 sse_deps="mmxext"
1635 sse2_deps="sse"
1636 sse3_deps="sse2"
1637 ssse3_deps="sse3"
1638 sse4_deps="ssse3"
1639 sse42_deps="sse4"
1640 avx_deps="sse42"
1641 xop_deps="avx"
1642 fma3_deps="avx"
1643 fma4_deps="avx"
1644 avx2_deps="avx"
1645
1646 mmx_external_deps="yasm"
1647 mmx_inline_deps="inline_asm"
1648 mmx_suggest="mmx_external mmx_inline"
1649
1650 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1651     eval dep=\$${ext}_deps
1652     eval ${ext}_external_deps='"${dep}_external"'
1653     eval ${ext}_inline_deps='"${dep}_inline"'
1654     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1655 done
1656
1657 aligned_stack_if_any="aarch64 ppc x86"
1658 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1659 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1660 fast_unaligned_if_any="aarch64 ppc x86"
1661
1662 need_memalign="altivec neon sse"
1663
1664 # system capabilities
1665 log2_deps="!libc_msvcrt"
1666
1667 symver_if_any="symver_asm_label symver_gnu_asm"
1668
1669 # threading support
1670 atomics_gcc_if="sync_val_compare_and_swap"
1671 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1672 atomics_win32_if="MemoryBarrier"
1673 atomics_native_if_any="$ATOMICS_LIST"
1674 w32threads_deps="atomics_native"
1675 threads_if_any="$THREADS_LIST"
1676
1677 # subsystems
1678 dct_select="rdft"
1679 error_resilience_select="dsputil"
1680 mdct_select="fft"
1681 rdft_select="fft"
1682 mpegaudio_select="mpegaudiodsp"
1683 mpegaudiodsp_select="dct"
1684 mpegvideo_select="dsputil hpeldsp videodsp"
1685 mpegvideoenc_select="dsputil mpegvideo"
1686
1687 # decoders / encoders
1688 aac_decoder_select="mdct sinewin"
1689 aac_encoder_select="audio_frame_queue mdct sinewin"
1690 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1691 ac3_decoder_select="mdct ac3dsp ac3_parser dsputil"
1692 ac3_encoder_select="mdct ac3dsp dsputil"
1693 ac3_fixed_encoder_select="mdct ac3dsp dsputil"
1694 aic_decoder_select="dsputil golomb"
1695 alac_encoder_select="lpc"
1696 als_decoder_select="dsputil"
1697 amrnb_decoder_select="lsp"
1698 amrwb_decoder_select="lsp"
1699 amv_decoder_select="sp5x_decoder"
1700 ape_decoder_select="dsputil"
1701 asv1_decoder_select="dsputil"
1702 asv1_encoder_select="dsputil"
1703 asv2_decoder_select="dsputil"
1704 asv2_encoder_select="dsputil"
1705 atrac1_decoder_select="mdct sinewin"
1706 atrac3_decoder_select="mdct"
1707 atrac3p_decoder_select="mdct sinewin"
1708 bink_decoder_select="dsputil hpeldsp"
1709 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
1710 binkaudio_rdft_decoder_select="mdct rdft sinewin"
1711 cavs_decoder_select="dsputil golomb h264chroma videodsp"
1712 cllc_decoder_select="dsputil"
1713 comfortnoise_encoder_select="lpc"
1714 cook_decoder_select="dsputil mdct sinewin"
1715 cscd_decoder_select="lzo"
1716 cscd_decoder_suggest="zlib"
1717 dca_decoder_select="mdct"
1718 dnxhd_decoder_select="dsputil"
1719 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
1720 dvvideo_decoder_select="dsputil"
1721 dvvideo_encoder_select="dsputil"
1722 dxa_decoder_deps="zlib"
1723 eac3_decoder_select="ac3_decoder"
1724 eac3_encoder_select="ac3_encoder"
1725 eamad_decoder_select="aandcttables dsputil mpegvideo"
1726 eatgq_decoder_select="aandcttables dsputil"
1727 eatqi_decoder_select="aandcttables dsputil error_resilience mpegvideo"
1728 ffv1_decoder_select="golomb rangecoder"
1729 ffv1_encoder_select="rangecoder"
1730 ffvhuff_decoder_select="huffyuv_decoder"
1731 ffvhuff_encoder_select="huffyuv_encoder"
1732 fic_decoder_select="dsputil golomb"
1733 flac_decoder_select="golomb"
1734 flac_encoder_select="dsputil golomb lpc"
1735 flashsv_decoder_deps="zlib"
1736 flashsv_encoder_deps="zlib"
1737 flashsv2_decoder_deps="zlib"
1738 flv_decoder_select="h263_decoder"
1739 flv_encoder_select="h263_encoder"
1740 fourxm_decoder_select="dsputil"
1741 fraps_decoder_select="dsputil huffman"
1742 g2m_decoder_deps="zlib"
1743 g2m_decoder_select="dsputil"
1744 h261_decoder_select="error_resilience mpegvideo"
1745 h261_encoder_select="aandcttables mpegvideoenc"
1746 h263_decoder_select="error_resilience h263_parser h263dsp mpegvideo"
1747 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1748 h263i_decoder_select="h263_decoder"
1749 h263p_encoder_select="h263_encoder"
1750 h264_decoder_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1751 h264_decoder_suggest="error_resilience"
1752 hevc_decoder_select="dsputil golomb videodsp"
1753 huffyuv_decoder_select="dsputil"
1754 huffyuv_encoder_select="dsputil huffman"
1755 iac_decoder_select="imc_decoder"
1756 imc_decoder_select="dsputil fft mdct sinewin"
1757 indeo3_decoder_select="hpeldsp"
1758 interplay_video_decoder_select="hpeldsp"
1759 jpegls_decoder_select="golomb mjpeg_decoder"
1760 jpegls_encoder_select="golomb"
1761 jv_decoder_select="dsputil"
1762 lagarith_decoder_select="dsputil"
1763 ljpeg_encoder_select="aandcttables mpegvideoenc"
1764 loco_decoder_select="golomb"
1765 mdec_decoder_select="dsputil error_resilience mpegvideo"
1766 metasound_decoder_select="lsp mdct sinewin"
1767 mimic_decoder_select="dsputil hpeldsp"
1768 mjpeg_decoder_select="dsputil hpeldsp"
1769 mjpeg_encoder_select="aandcttables mpegvideoenc"
1770 mjpegb_decoder_select="mjpeg_decoder"
1771 mlp_decoder_select="mlp_parser"
1772 motionpixels_decoder_select="dsputil"
1773 mp1_decoder_select="mpegaudio"
1774 mp1float_decoder_select="mpegaudio"
1775 mp2_decoder_select="mpegaudio"
1776 mp2float_decoder_select="mpegaudio"
1777 mp3_decoder_select="mpegaudio"
1778 mp3adu_decoder_select="mpegaudio"
1779 mp3adufloat_decoder_select="mpegaudio"
1780 mp3float_decoder_select="mpegaudio"
1781 mp3on4_decoder_select="mpegaudio"
1782 mp3on4float_decoder_select="mpegaudio"
1783 mpc7_decoder_select="dsputil mpegaudiodsp"
1784 mpc8_decoder_select="mpegaudiodsp"
1785 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1786 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1787 mpeg1video_decoder_select="error_resilience mpegvideo"
1788 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1789 mpeg2video_decoder_select="error_resilience mpegvideo"
1790 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1791 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1792 mpeg4_encoder_select="h263_encoder"
1793 msmpeg4v1_decoder_select="h263_decoder"
1794 msmpeg4v2_decoder_select="h263_decoder"
1795 msmpeg4v2_encoder_select="h263_encoder"
1796 msmpeg4v3_decoder_select="h263_decoder"
1797 msmpeg4v3_encoder_select="h263_encoder"
1798 mss2_decoder_select="error_resilience vc1_decoder"
1799 mxpeg_decoder_select="mjpeg_decoder"
1800 nellymoser_decoder_select="mdct sinewin"
1801 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1802 nuv_decoder_select="dsputil lzo"
1803 png_decoder_deps="zlib"
1804 png_encoder_deps="zlib"
1805 png_encoder_select="dsputil"
1806 prores_decoder_select="dsputil"
1807 prores_encoder_select="dsputil"
1808 qcelp_decoder_select="lsp"
1809 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1810 ra_144_encoder_select="audio_frame_queue lpc"
1811 ralf_decoder_select="golomb"
1812 rv10_decoder_select="error_resilience h263_decoder h263dsp"
1813 rv10_encoder_select="h263_encoder"
1814 rv20_decoder_select="error_resilience h263_decoder h263dsp"
1815 rv20_encoder_select="h263_encoder"
1816 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1817 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
1818 shorten_decoder_select="golomb"
1819 sipr_decoder_select="lsp"
1820 sp5x_decoder_select="mjpeg_decoder"
1821 svq1_decoder_select="hpeldsp"
1822 svq1_encoder_select="aandcttables dsputil hpeldsp mpegvideoenc"
1823 svq3_decoder_select="h264_decoder hpeldsp"
1824 svq3_decoder_suggest="zlib"
1825 tak_decoder_select="dsputil"
1826 theora_decoder_select="vp3_decoder"
1827 thp_decoder_select="mjpeg_decoder"
1828 tiff_decoder_suggest="zlib"
1829 tiff_encoder_suggest="zlib"
1830 truehd_decoder_select="mlp_decoder"
1831 truemotion2_decoder_select="dsputil"
1832 truespeech_decoder_select="dsputil"
1833 tscc_decoder_deps="zlib"
1834 twinvq_decoder_select="mdct lsp sinewin"
1835 utvideo_decoder_select="dsputil"
1836 utvideo_encoder_select="dsputil huffman"
1837 vble_decoder_select="dsputil"
1838 vc1_decoder_select="error_resilience h263_decoder h264chroma h264qpel intrax8"
1839 vc1image_decoder_select="vc1_decoder"
1840 vorbis_decoder_select="mdct"
1841 vorbis_encoder_select="mdct"
1842 vp3_decoder_select="hpeldsp vp3dsp videodsp"
1843 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp"
1844 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
1845 vp6a_decoder_select="vp6_decoder"
1846 vp6f_decoder_select="vp6_decoder"
1847 vp8_decoder_select="h264pred videodsp"
1848 vp9_decoder_select="videodsp"
1849 webp_decoder_select="vp8_decoder"
1850 wmapro_decoder_select="mdct sinewin"
1851 wmav1_decoder_select="mdct sinewin"
1852 wmav1_encoder_select="mdct sinewin"
1853 wmav2_decoder_select="mdct sinewin"
1854 wmav2_encoder_select="mdct sinewin"
1855 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
1856 wmv1_decoder_select="h263_decoder"
1857 wmv1_encoder_select="h263_encoder"
1858 wmv2_decoder_select="h263_decoder intrax8 videodsp"
1859 wmv2_encoder_select="h263_encoder"
1860 wmv3_decoder_select="vc1_decoder"
1861 wmv3image_decoder_select="wmv3_decoder"
1862 zerocodec_decoder_deps="zlib"
1863 zlib_decoder_deps="zlib"
1864 zlib_encoder_deps="zlib"
1865 zmbv_decoder_deps="zlib"
1866 zmbv_encoder_deps="zlib"
1867
1868 # hardware accelerators
1869 dxva2_deps="dxva2api_h"
1870 vaapi_deps="va_va_h"
1871 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
1872 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
1873 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
1874
1875 h263_vaapi_hwaccel_deps="vaapi"
1876 h263_vaapi_hwaccel_select="h263_decoder"
1877 h263_vdpau_hwaccel_deps="vdpau"
1878 h263_vdpau_hwaccel_select="h263_decoder"
1879 h264_dxva2_hwaccel_deps="dxva2"
1880 h264_dxva2_hwaccel_select="h264_decoder"
1881 h264_vaapi_hwaccel_deps="vaapi"
1882 h264_vaapi_hwaccel_select="h264_decoder"
1883 h264_vda_hwaccel_deps="vda"
1884 h264_vda_hwaccel_select="h264_decoder"
1885 h264_vdpau_hwaccel_deps="vdpau"
1886 h264_vdpau_hwaccel_select="h264_decoder"
1887 mpeg1_vdpau_hwaccel_deps="vdpau"
1888 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
1889 mpeg2_dxva2_hwaccel_deps="dxva2"
1890 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
1891 mpeg2_vaapi_hwaccel_deps="vaapi"
1892 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
1893 mpeg2_vdpau_hwaccel_deps="vdpau"
1894 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
1895 mpeg4_vaapi_hwaccel_deps="vaapi"
1896 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
1897 mpeg4_vdpau_hwaccel_deps="vdpau"
1898 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
1899 vc1_dxva2_hwaccel_deps="dxva2"
1900 vc1_dxva2_hwaccel_select="vc1_decoder"
1901 vc1_vaapi_hwaccel_deps="vaapi"
1902 vc1_vaapi_hwaccel_select="vc1_decoder"
1903 vc1_vdpau_hwaccel_deps="vdpau"
1904 vc1_vdpau_hwaccel_select="vc1_decoder"
1905 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
1906 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
1907 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
1908
1909 # parsers
1910 h264_parser_select="golomb h264chroma h264dsp h264pred h264qpel videodsp"
1911 mpeg4video_parser_select="error_resilience h263dsp mpegvideo"
1912 mpegvideo_parser_select="error_resilience mpegvideo"
1913 vc1_parser_select="mpegvideo"
1914
1915 # external libraries
1916 libfaac_encoder_deps="libfaac"
1917 libfaac_encoder_select="audio_frame_queue"
1918 libfdk_aac_decoder_deps="libfdk_aac"
1919 libfdk_aac_encoder_deps="libfdk_aac"
1920 libfdk_aac_encoder_select="audio_frame_queue"
1921 libgsm_decoder_deps="libgsm"
1922 libgsm_encoder_deps="libgsm"
1923 libgsm_ms_decoder_deps="libgsm"
1924 libgsm_ms_encoder_deps="libgsm"
1925 libilbc_decoder_deps="libilbc"
1926 libilbc_encoder_deps="libilbc"
1927 libmp3lame_encoder_deps="libmp3lame"
1928 libmp3lame_encoder_select="audio_frame_queue"
1929 libopencore_amrnb_decoder_deps="libopencore_amrnb"
1930 libopencore_amrnb_encoder_deps="libopencore_amrnb"
1931 libopencore_amrnb_encoder_select="audio_frame_queue"
1932 libopencore_amrwb_decoder_deps="libopencore_amrwb"
1933 libopenjpeg_decoder_deps="libopenjpeg"
1934 libopenjpeg_encoder_deps="libopenjpeg"
1935 libopus_decoder_deps="libopus"
1936 libopus_encoder_deps="libopus"
1937 libopus_encoder_select="audio_frame_queue"
1938 libschroedinger_decoder_deps="libschroedinger"
1939 libschroedinger_encoder_deps="libschroedinger"
1940 libspeex_decoder_deps="libspeex"
1941 libspeex_encoder_deps="libspeex"
1942 libspeex_encoder_select="audio_frame_queue"
1943 libtheora_encoder_deps="libtheora"
1944 libvo_aacenc_encoder_deps="libvo_aacenc"
1945 libvo_aacenc_encoder_select="audio_frame_queue"
1946 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
1947 libvorbis_encoder_deps="libvorbis"
1948 libvorbis_encoder_select="audio_frame_queue"
1949 libvpx_vp8_decoder_deps="libvpx"
1950 libvpx_vp8_encoder_deps="libvpx"
1951 libvpx_vp9_decoder_deps="libvpx"
1952 libvpx_vp9_encoder_deps="libvpx"
1953 libwavpack_encoder_deps="libwavpack"
1954 libwebp_encoder_deps="libwebp"
1955 libx264_encoder_deps="libx264"
1956 libx265_encoder_deps="libx265"
1957 libxavs_encoder_deps="libxavs"
1958 libxvid_encoder_deps="libxvid"
1959
1960 # demuxers / muxers
1961 ac3_demuxer_select="ac3_parser"
1962 asf_demuxer_select="riffdec"
1963 asf_muxer_select="riffenc"
1964 asf_stream_muxer_select="asf_muxer"
1965 avi_demuxer_select="riffdec"
1966 avi_muxer_select="riffenc"
1967 avisynth_demuxer_deps="avisynth"
1968 avisynth_demuxer_select="riffdec"
1969 caf_demuxer_select="riffdec"
1970 dirac_demuxer_select="dirac_parser"
1971 dxa_demuxer_select="riffdec"
1972 eac3_demuxer_select="ac3_parser"
1973 f4v_muxer_select="mov_muxer"
1974 flac_demuxer_select="flac_parser"
1975 hds_muxer_select="flv_muxer"
1976 hls_muxer_select="mpegts_muxer"
1977 ipod_muxer_select="mov_muxer"
1978 ismv_muxer_select="mov_muxer"
1979 matroska_audio_muxer_select="matroska_muxer"
1980 matroska_demuxer_select="riffdec"
1981 matroska_demuxer_suggest="bzlib lzo zlib"
1982 matroska_muxer_select="riffenc"
1983 mmf_muxer_select="riffenc"
1984 mov_demuxer_select="riffdec"
1985 mov_demuxer_suggest="zlib"
1986 mov_muxer_select="riffenc rtpenc_chain"
1987 mp3_demuxer_select="mpegaudio_parser"
1988 mp4_muxer_select="mov_muxer"
1989 mpegts_muxer_select="adts_muxer latm_muxer"
1990 mpegtsraw_demuxer_select="mpegts_demuxer"
1991 mxf_d10_muxer_select="mxf_muxer"
1992 nut_muxer_select="riffenc"
1993 nuv_demuxer_select="riffdec"
1994 ogg_demuxer_select="golomb"
1995 psp_muxer_select="mov_muxer"
1996 rtp_demuxer_select="sdp_demuxer"
1997 rtpdec_select="asf_demuxer rm_demuxer rtp_protocol mpegts_demuxer mov_demuxer"
1998 rtsp_demuxer_select="http_protocol rtpdec"
1999 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2000 sap_demuxer_select="sdp_demuxer"
2001 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2002 sdp_demuxer_select="rtpdec"
2003 smoothstreaming_muxer_select="ismv_muxer"
2004 spdif_muxer_select="aac_parser"
2005 tak_demuxer_select="tak_parser"
2006 tg2_muxer_select="mov_muxer"
2007 tgp_muxer_select="mov_muxer"
2008 w64_demuxer_select="wav_demuxer"
2009 wav_demuxer_select="riffdec"
2010 wav_muxer_select="riffenc"
2011 webm_muxer_select="riffenc"
2012 wtv_demuxer_select="riffdec"
2013 xmv_demuxer_select="riffdec"
2014 xwma_demuxer_select="riffdec"
2015
2016 # indevs / outdevs
2017 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2018 alsa_outdev_deps="alsa_asoundlib_h"
2019 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2020 dv1394_indev_deps="dv1394"
2021 dv1394_indev_select="dv_demuxer"
2022 fbdev_indev_deps="linux_fb_h"
2023 jack_indev_deps="jack_jack_h pthreads"
2024 libcdio_indev_deps="libcdio"
2025 libdc1394_indev_deps="libdc1394"
2026 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2027 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2028 pulse_indev_deps="libpulse"
2029 sndio_indev_deps="sndio_h"
2030 sndio_outdev_deps="sndio_h"
2031 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2032 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2033 vfwcap_indev_extralibs="-lavicap32"
2034 x11grab_indev_deps="x11grab XShmCreateImage"
2035
2036 # protocols
2037 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2038 ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
2039 ffrtmpcrypt_protocol_select="tcp_protocol"
2040 ffrtmphttp_protocol_deps="!librtmp_protocol"
2041 ffrtmphttp_protocol_select="http_protocol"
2042 gopher_protocol_select="network"
2043 http_protocol_select="tcp_protocol"
2044 httpproxy_protocol_select="tcp_protocol"
2045 https_protocol_select="tls_protocol"
2046 librtmp_protocol_deps="librtmp"
2047 librtmpe_protocol_deps="librtmp"
2048 librtmps_protocol_deps="librtmp"
2049 librtmpt_protocol_deps="librtmp"
2050 librtmpte_protocol_deps="librtmp"
2051 mmsh_protocol_select="http_protocol"
2052 mmst_protocol_select="network"
2053 rtmp_protocol_deps="!librtmp_protocol"
2054 rtmp_protocol_select="tcp_protocol"
2055 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2056 rtmps_protocol_deps="!librtmp_protocol"
2057 rtmps_protocol_select="tls_protocol"
2058 rtmpt_protocol_select="ffrtmphttp_protocol"
2059 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2060 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2061 rtp_protocol_select="udp_protocol"
2062 sctp_protocol_deps="struct_sctp_event_subscribe"
2063 sctp_protocol_select="network"
2064 srtp_protocol_select="rtp_protocol"
2065 tcp_protocol_select="network"
2066 tls_protocol_deps_any="openssl gnutls"
2067 tls_protocol_select="tcp_protocol"
2068 udp_protocol_select="network"
2069 unix_protocol_deps="sys_un_h"
2070 unix_protocol_select="network"
2071
2072 # filters
2073 blackframe_filter_deps="gpl"
2074 boxblur_filter_deps="gpl"
2075 cropdetect_filter_deps="gpl"
2076 delogo_filter_deps="gpl"
2077 drawtext_filter_deps="libfreetype"
2078 frei0r_filter_deps="frei0r dlopen"
2079 frei0r_filter_extralibs='$ldl'
2080 frei0r_src_filter_deps="frei0r dlopen"
2081 frei0r_src_filter_extralibs='$ldl'
2082 hqdn3d_filter_deps="gpl"
2083 interlace_filter_deps="gpl"
2084 ocv_filter_deps="libopencv"
2085 resample_filter_deps="avresample"
2086 scale_filter_deps="swscale"
2087
2088 # examples
2089 avcodec_example_deps="avcodec avutil"
2090 filter_audio_example_deps="avfilter avutil"
2091 metadata_example_deps="avformat avutil"
2092 output_example_deps="avcodec avformat avutil swscale"
2093 transcode_aac_example_deps="avcodec avformat avresample"
2094
2095 # libraries
2096 avcodec_deps="avutil"
2097 avdevice_deps="avutil avcodec avformat"
2098 avfilter_deps="avutil"
2099 avformat_deps="avutil avcodec"
2100 avresample_deps="avutil"
2101 swscale_deps="avutil"
2102
2103 # programs
2104 avconv_deps="avcodec avfilter avformat avresample swscale"
2105 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2106                fps_filter null_filter resample_filter scale_filter
2107                setpts_filter trim_filter"
2108 avplay_deps="avcodec avformat avresample swscale sdl"
2109 avplay_libs='$sdl_libs'
2110 avplay_select="rdft"
2111 avprobe_deps="avcodec avformat"
2112 avserver_deps="avformat fork !shared"
2113 avserver_select="ffm_muxer rtp_protocol rtsp_demuxer"
2114
2115 # documentation
2116 pod2man_deps="doc"
2117 texi2html_deps="doc"
2118
2119 # default parameters
2120
2121 logfile="config.log"
2122
2123 # installation paths
2124 prefix_default="/usr/local"
2125 bindir_default='${prefix}/bin'
2126 datadir_default='${prefix}/share/avconv'
2127 docdir_default='${prefix}/share/doc/libav'
2128 incdir_default='${prefix}/include'
2129 libdir_default='${prefix}/lib'
2130 mandir_default='${prefix}/share/man'
2131 shlibdir_default="$libdir_default"
2132
2133 # toolchain
2134 ar_default="ar"
2135 cc_default="gcc"
2136 host_cc_default="gcc"
2137 cp_f="cp -f"
2138 ln_s="ln -s -f"
2139 nm_default="nm -g"
2140 objformat="elf"
2141 pkg_config_default=pkg-config
2142 ranlib="ranlib"
2143 strip="strip"
2144 yasmexe="yasm"
2145
2146 nogas=":"
2147
2148 # machine
2149 arch_default=$(uname -m)
2150 cpu="generic"
2151
2152 # OS
2153 target_os_default=$(tolower $(uname -s))
2154 host_os=$target_os_default
2155
2156 # configurable options
2157 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2158
2159 enable asm
2160 enable debug
2161 enable doc
2162 enable optimizations
2163 enable safe_bitstream_reader
2164 enable static
2165 enable swscale_alpha
2166
2167 # By default, enable only those hwaccels that have no external dependencies.
2168 enable dxva2 vdpau
2169
2170 # build settings
2171 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2172 LIBPREF="lib"
2173 LIBSUF=".a"
2174 FULLNAME='$(NAME)$(BUILDSUF)'
2175 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2176 SLIBPREF="lib"
2177 SLIBSUF=".so"
2178 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2179 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2180 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2181 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2182 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2183 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2184
2185 asflags_filter=echo
2186 cflags_filter=echo
2187 ldflags_filter=echo
2188
2189 AS_C='-c'
2190 AS_O='-o $@'
2191 CC_C='-c'
2192 CC_E='-E -o $@'
2193 CC_O='-o $@'
2194 LD_O='-o $@'
2195 LD_LIB='-l%'
2196 LD_PATH='-L'
2197 HOSTCC_C='-c'
2198 HOSTCC_E='-E -o $@'
2199 HOSTCC_O='-o $@'
2200 HOSTLD_O='-o $@'
2201
2202 host_libs='-lm'
2203 host_cflags_filter=echo
2204 host_ldflags_filter=echo
2205
2206 target_path='$(CURDIR)'
2207
2208 # since the object filename is not given with the -MM flag, the compiler
2209 # is only able to print the basename, and we must add the path ourselves
2210 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2211 DEPFLAGS='-MM'
2212
2213 # find source path
2214 if test -f configure; then
2215     source_path=.
2216 else
2217     source_path=$(cd $(dirname "$0"); pwd)
2218     echo "$source_path" | grep -q '[[:blank:]]' &&
2219         die "Out of tree builds are impossible with whitespace in source path."
2220     test -e "$source_path/config.h" &&
2221         die "Out of tree builds are impossible with config.h in source dir."
2222 fi
2223
2224 for v in "$@"; do
2225     r=${v#*=}
2226     l=${v%"$r"}
2227     r=$(sh_quote "$r")
2228     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2229 done
2230
2231 find_things(){
2232     thing=$1
2233     pattern=$2
2234     file=$source_path/$3
2235     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2236 }
2237
2238 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2239 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2240 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2241 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2242 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2243 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2244 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2245 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2246 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2247 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2248 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2249
2250 ALL_COMPONENTS="
2251     $BSF_LIST
2252     $DECODER_LIST
2253     $DEMUXER_LIST
2254     $ENCODER_LIST
2255     $FILTER_LIST
2256     $HWACCEL_LIST
2257     $INDEV_LIST
2258     $MUXER_LIST
2259     $OUTDEV_LIST
2260     $PARSER_LIST
2261     $PROTOCOL_LIST
2262 "
2263
2264 for n in $COMPONENT_LIST; do
2265     v=$(toupper ${n%s})_LIST
2266     eval enable \$$v
2267     eval ${n}_if_any="\$$v"
2268 done
2269
2270 enable $ARCH_EXT_LIST
2271
2272 die_unknown(){
2273     echo "Unknown option \"$1\"."
2274     echo "See $0 --help for available options."
2275     exit 1
2276 }
2277
2278 print_3_columns() {
2279     cat | tr ' ' '\n' | sort | pr -r -3 -t
2280 }
2281
2282 show_list() {
2283     suffix=_$1
2284     shift
2285     echo $* | sed s/$suffix//g | print_3_columns
2286     exit 0
2287 }
2288
2289 rand_list(){
2290     IFS=', '
2291     set -- $*
2292     unset IFS
2293     for thing; do
2294         comp=${thing%:*}
2295         prob=${thing#$comp}
2296         prob=${prob#:}
2297         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2298         echo "prob ${prob:-0.5}"
2299         printf '%s\n' $comp
2300     done
2301 }
2302
2303 do_random(){
2304     action=$1
2305     shift
2306     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2307     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2308 }
2309
2310 for opt do
2311     optval="${opt#*=}"
2312     case "$opt" in
2313         --extra-ldflags=*)
2314             add_ldflags $optval
2315         ;;
2316         --extra-libs=*)
2317             add_extralibs $optval
2318         ;;
2319         --disable-devices)
2320             disable $INDEV_LIST $OUTDEV_LIST
2321         ;;
2322         --enable-debug=*)
2323             debuglevel="$optval"
2324         ;;
2325         --disable-programs)
2326             disable $PROGRAM_LIST
2327         ;;
2328         --disable-everything)
2329             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2330         ;;
2331         --disable-all)
2332             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2333             disable $LIBRARY_LIST $PROGRAM_LIST doc
2334         ;;
2335         --enable-random|--disable-random)
2336             action=${opt%%-random}
2337             do_random ${action#--} $COMPONENT_LIST
2338         ;;
2339         --enable-random=*|--disable-random=*)
2340             action=${opt%%-random=*}
2341             do_random ${action#--} $optval
2342         ;;
2343         --enable-*=*|--disable-*=*)
2344             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2345             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2346             eval list=\$$(toupper $thing)_LIST
2347             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2348             $action $(filter "$name" $list)
2349         ;;
2350         --enable-?*|--disable-?*)
2351             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2352             if is_in $option $COMPONENT_LIST; then
2353                 test $action = disable && action=unset
2354                 eval $action \$$(toupper ${option%s})_LIST
2355             elif is_in $option $CMDLINE_SELECT; then
2356                 $action $option
2357             else
2358                 die_unknown $opt
2359             fi
2360         ;;
2361         --list-*)
2362             NAME="${opt#--list-}"
2363             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2364             NAME=${NAME%s}
2365             eval show_list $NAME \$$(toupper $NAME)_LIST
2366         ;;
2367         --help|-h) show_help
2368         ;;
2369         *)
2370             optname="${opt%%=*}"
2371             optname="${optname#--}"
2372             optname=$(echo "$optname" | sed 's/-/_/g')
2373             if is_in $optname $CMDLINE_SET; then
2374                 eval $optname='$optval'
2375             elif is_in $optname $CMDLINE_APPEND; then
2376                 append $optname "$optval"
2377             else
2378                 die_unknown $opt
2379             fi
2380         ;;
2381     esac
2382 done
2383
2384 disabled logging && logfile=/dev/null
2385
2386 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2387 set >> $logfile
2388
2389 test -n "$cross_prefix" && enable cross_compile
2390
2391 if enabled cross_compile; then
2392     test -n "$arch" && test -n "$target_os" ||
2393         die "Must specify target arch and OS when cross-compiling"
2394 fi
2395
2396 ar_default="${cross_prefix}${ar_default}"
2397 cc_default="${cross_prefix}${cc_default}"
2398 nm_default="${cross_prefix}${nm_default}"
2399 pkg_config_default="${cross_prefix}${pkg_config_default}"
2400 ranlib="${cross_prefix}${ranlib}"
2401 strip="${cross_prefix}${strip}"
2402
2403 sysinclude_default="${sysroot}/usr/include"
2404
2405 case "$toolchain" in
2406     clang-asan)
2407         cc_default="clang"
2408         add_cflags  -fsanitize=address
2409         add_ldflags -fsanitize=address
2410     ;;
2411     clang-tsan)
2412         cc_default="clang"
2413         add_cflags  -fsanitize=thread -pie
2414         add_ldflags -fsanitize=thread -pie
2415     ;;
2416     clang-usan)
2417         cc_default="clang"
2418         add_cflags  -fsanitize=undefined
2419         add_ldflags -fsanitize=undefined
2420     ;;
2421     gcc-asan)
2422         cc_default="gcc"
2423         add_cflags  -fsanitize=address
2424         add_ldflags -fsanitize=address
2425     ;;
2426     gcc-tsan)
2427         cc_default="gcc"
2428         add_cflags  -fsanitize=thread -pie -fPIC
2429         add_ldflags -fsanitize=thread -pie -fPIC
2430     ;;
2431     gcc-usan)
2432         cc_default="gcc"
2433         add_cflags  -fsanitize=undefined
2434         add_ldflags -fsanitize=undefined
2435     ;;
2436     valgrind-massif)
2437         target_exec_default="valgrind"
2438         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2439     ;;
2440     valgrind-memcheck)
2441         target_exec_default="valgrind"
2442         target_exec_args="--track-origins=yes --leak-check=full"
2443     ;;
2444     msvc)
2445         # Check whether the current MSVC version needs the C99 converter.
2446         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2447         # support enough of C99 to build libav. Default to the new
2448         # behaviour if the regexp was unable to match anything, since this
2449         # successfully parses the version number of existing supported
2450         # versions that require the converter (MSVC 2010 and 2012).
2451         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2452         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2453             cc_default="cl"
2454         else
2455             cc_default="c99wrap cl"
2456         fi
2457         ld_default="link"
2458         nm_default="dumpbin -symbols"
2459         ar_default="lib"
2460         target_os_default="win32"
2461         # Use a relative path for TMPDIR. This makes sure all the
2462         # ffconf temp files are written with a relative path, avoiding
2463         # issues with msys/win32 path conversion for MSVC parameters
2464         # such as -Fo<file> or -out:<file>.
2465         TMPDIR=.
2466     ;;
2467     icl)
2468         cc_default="icl"
2469         ld_default="xilink"
2470         nm_default="dumpbin -symbols"
2471         ar_default="xilib"
2472         target_os_default="win32"
2473         TMPDIR=.
2474     ;;
2475     gcov)
2476         add_cflags  -fprofile-arcs -ftest-coverage
2477         add_ldflags -fprofile-arcs -ftest-coverage
2478     ;;
2479     hardened)
2480         add_cflags  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
2481         add_ldflags -Wl,-z,relro -Wl,-z,now
2482     ;;
2483     ?*)
2484         die "Unknown toolchain $toolchain"
2485     ;;
2486 esac
2487
2488 set_default arch cc pkg_config sysinclude target_exec target_os
2489 enabled cross_compile || host_cc_default=$cc
2490 set_default host_cc
2491
2492 if ! $pkg_config --version >/dev/null 2>&1; then
2493     warn "$pkg_config not found, library detection may fail."
2494     pkg_config=false
2495 fi
2496
2497 exesuf() {
2498     case $1 in
2499         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2500     esac
2501 }
2502
2503 EXESUF=$(exesuf $target_os)
2504 HOSTEXESUF=$(exesuf $host_os)
2505
2506 # set temporary file name
2507 : ${TMPDIR:=$TEMPDIR}
2508 : ${TMPDIR:=$TMP}
2509 : ${TMPDIR:=/tmp}
2510
2511 if ! check_cmd mktemp -u XXXXXX; then
2512     # simple replacement for missing mktemp
2513     # NOT SAFE FOR GENERAL USE
2514     mktemp(){
2515         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2516     }
2517 fi
2518
2519 tmpfile(){
2520     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2521         (set -C; exec > $tmp) 2>/dev/null ||
2522         die "Unable to create temporary file in $TMPDIR."
2523     append TMPFILES $tmp
2524     eval $1=$tmp
2525 }
2526
2527 trap 'rm -f -- $TMPFILES' EXIT
2528
2529 tmpfile TMPASM .asm
2530 tmpfile TMPC   .c
2531 tmpfile TMPE   $EXESUF
2532 tmpfile TMPH   .h
2533 tmpfile TMPO   .o
2534 tmpfile TMPS   .S
2535 tmpfile TMPSH  .sh
2536 tmpfile TMPV   .ver
2537
2538 unset -f mktemp
2539
2540 chmod +x $TMPE
2541
2542 # make sure we can execute files in $TMPDIR
2543 cat > $TMPSH 2>> $logfile <<EOF
2544 #! /bin/sh
2545 EOF
2546 chmod +x $TMPSH >> $logfile 2>&1
2547 if ! $TMPSH >> $logfile 2>&1; then
2548     cat <<EOF
2549 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2550 variable to another directory and make sure that it is not mounted noexec.
2551 EOF
2552     die "Sanity test failed."
2553 fi
2554
2555 ccc_flags(){
2556     for flag; do
2557         case $flag in
2558             -std=c99)           echo -c99                       ;;
2559             -mcpu=*)            echo -arch ${flag#*=}           ;;
2560             -mieee)             echo -ieee                      ;;
2561             -O*|-fast)          echo $flag                      ;;
2562             -fno-math-errno)    echo -assume nomath_errno       ;;
2563             -g)                 echo -g3                        ;;
2564             -Wall)              echo -msg_enable level2         ;;
2565             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2566             -Wl,*)              echo $flag                      ;;
2567             -f*|-W*)                                            ;;
2568             *)                  echo $flag                      ;;
2569         esac
2570    done
2571 }
2572
2573 cparser_flags(){
2574     for flag; do
2575         case $flag in
2576             -Wno-switch)             echo -Wno-switch-enum ;;
2577             -Wno-format-zero-length) ;;
2578             -Wdisabled-optimization) ;;
2579             -Wno-pointer-sign)       echo -Wno-other ;;
2580             *)                       echo $flag ;;
2581         esac
2582     done
2583 }
2584
2585 msvc_common_flags(){
2586     for flag; do
2587         case $flag in
2588             # In addition to specifying certain flags under the compiler
2589             # specific filters, they must be specified here as well or else the
2590             # generic catch all at the bottom will print the original flag.
2591             -Wall)                ;;
2592             -std=c99)             ;;
2593             # Common flags
2594             -fomit-frame-pointer) ;;
2595             -g)                   echo -Z7 ;;
2596             -fno-math-errno)      ;;
2597             -fno-common)          ;;
2598             -fno-signed-zeros)    ;;
2599             -fPIC)                ;;
2600             -mthumb)              ;;
2601             -march=*)             ;;
2602             -lz)                  echo zlib.lib ;;
2603             -lavifil32)           echo vfw32.lib ;;
2604             -lavicap32)           echo vfw32.lib user32.lib ;;
2605             -l*)                  echo ${flag#-l}.lib ;;
2606             *)                    echo $flag ;;
2607         esac
2608     done
2609 }
2610
2611 msvc_flags(){
2612     msvc_common_flags "$@"
2613     for flag; do
2614         case $flag in
2615             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2616                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2617                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2618                                        -wd4273 ;;
2619         esac
2620     done
2621 }
2622
2623 icl_flags(){
2624     msvc_common_flags "$@"
2625     for flag; do
2626         case $flag in
2627             # Despite what Intel's documentation says -Wall, which is supported
2628             # on Windows, does enable remarks so disable them here.
2629             -Wall)                echo $flag -Qdiag-disable:remark ;;
2630             -std=c99)             echo -Qstd=c99 ;;
2631         esac
2632     done
2633 }
2634
2635 pgi_flags(){
2636     for flag; do
2637         case $flag in
2638             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2639             -fomit-frame-pointer) echo -Mnoframe ;;
2640             -g)                   echo -gopt ;;
2641             *)                    echo $flag ;;
2642         esac
2643     done
2644 }
2645
2646 suncc_flags(){
2647     for flag; do
2648         case $flag in
2649             -march=*|-mcpu=*)
2650                 case "${flag#*=}" in
2651                     native)                   echo -xtarget=native       ;;
2652                     v9|niagara)               echo -xarch=sparc          ;;
2653                     ultrasparc)               echo -xarch=sparcvis       ;;
2654                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2655                     i586|pentium)             echo -xchip=pentium        ;;
2656                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2657                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2658                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2659                     pentium4*)          echo -xtarget=pentium4           ;;
2660                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2661                     *-sse3)             echo -xarch=sse3                 ;;
2662                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2663                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2664                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2665                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2666                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2667                     k8|opteron|athlon64|athlon-fx)
2668                                                echo -xarch=sse2a         ;;
2669                     athlon*)                   echo -xarch=pentium_proa  ;;
2670                 esac
2671                 ;;
2672             -std=c99)             echo -xc99              ;;
2673             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2674             -fPIC)                echo -KPIC -xcode=pic32 ;;
2675             -W*,*)                echo $flag              ;;
2676             -f*-*|-W*|-mimpure-text)                      ;;
2677             -shared)              echo -G                 ;;
2678             *)                    echo $flag              ;;
2679         esac
2680     done
2681 }
2682
2683 tms470_flags(){
2684     for flag; do
2685         case $flag in
2686             -march=*|-mcpu=*)
2687                 case "${flag#*=}" in
2688                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2689                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2690                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2691                     armv6*|arm11*)          echo -mv=6   ;;
2692                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2693                                             echo -mv=5e  ;;
2694                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2695                 esac
2696                 ;;
2697             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2698             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2699             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2700             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2701             -msoft-float)   echo --float_support=vfplib       ;;
2702             -O[0-3]|-mf=*)  echo $flag                        ;;
2703             -g)             echo -g -mn                       ;;
2704             -pds=*)         echo $flag                        ;;
2705             -D*|-I*)        echo $flag                        ;;
2706             --gcc|--abi=*)  echo $flag                        ;;
2707             -me)            echo $flag                        ;;
2708         esac
2709     done
2710 }
2711
2712 probe_cc(){
2713     pfx=$1
2714     _cc=$2
2715
2716     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2717     unset _ld_o _ldflags _ld_lib _ld_path
2718     unset _depflags _DEPCMD _DEPFLAGS
2719     _flags_filter=echo
2720
2721     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2722         _type=llvm_gcc
2723         gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
2724         _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
2725         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2726         _cflags_speed='-O3'
2727         _cflags_size='-Os'
2728     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2729         _type=gcc
2730         gcc_version=$($_cc --version | head -n1)
2731         gcc_basever=$($_cc -dumpversion)
2732         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2733         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2734         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2735         if ! $_cc -dumpversion | grep -q '^2\.'; then
2736             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2737         fi
2738         _cflags_speed='-O3'
2739         _cflags_size='-Os'
2740     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2741         _type=icc
2742         _ident=$($_cc --version | head -n1)
2743         _depflags='-MMD'
2744         _cflags_speed='-O3'
2745         _cflags_size='-Os'
2746         _cflags_noopt='-O1'
2747     elif $_cc -v 2>&1 | grep -q xlc; then
2748         _type=xlc
2749         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2750         _cflags_speed='-O5'
2751         _cflags_size='-O5 -qcompact'
2752     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2753         _type=ccc
2754         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2755         _DEPFLAGS='-M'
2756         _cflags_speed='-fast'
2757         _cflags_size='-O1'
2758         _flags_filter=ccc_flags
2759     elif $_cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
2760         test -d "$sysroot" || die "No valid sysroot specified."
2761         _type=armcc
2762         _ident=$($_cc --vsn | head -n1)
2763         armcc_conf="$PWD/armcc.conf"
2764         $_cc --arm_linux_configure                 \
2765              --arm_linux_config_file="$armcc_conf" \
2766              --configure_sysroot="$sysroot"        \
2767              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
2768              die "Error creating armcc configuration file."
2769         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
2770         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
2771         as_default="${cross_prefix}gcc"
2772         _depflags='-MMD'
2773         _cflags_speed='-O3'
2774         _cflags_size='-Os'
2775     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
2776         _type=tms470
2777         _ident=$($_cc -version | head -n1 | tr -s ' ')
2778         _flags='--gcc --abi=eabi -me'
2779         _cc_e='-ppl -fe=$@'
2780         _cc_o='-fe=$@'
2781         _depflags='-ppa -ppd=$(@:.o=.d)'
2782         _cflags_speed='-O3 -mf=5'
2783         _cflags_size='-O3 -mf=2'
2784         _flags_filter=tms470_flags
2785     elif $_cc -v 2>&1 | grep -q clang; then
2786         _type=clang
2787         _ident=$($_cc --version | head -n1)
2788         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2789         _cflags_speed='-O3'
2790         _cflags_size='-Os'
2791     elif $_cc -V 2>&1 | grep -q Sun; then
2792         _type=suncc
2793         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
2794         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
2795         _DEPFLAGS='-xM1 -xc99'
2796         _ldflags='-std=c99'
2797         _cflags_speed='-O5'
2798         _cflags_size='-O5 -xspace'
2799         _flags_filter=suncc_flags
2800     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
2801         _type=pathscale
2802         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2803         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2804         _cflags_speed='-O2'
2805         _cflags_size='-Os'
2806         _flags_filter='filter_out -Wdisabled-optimization'
2807     elif $_cc -v 2>&1 | grep -q Open64; then
2808         _type=open64
2809         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
2810         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2811         _cflags_speed='-O2'
2812         _cflags_size='-Os'
2813         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
2814     elif $_cc -V 2>&1 | grep -q Portland; then
2815         _type=pgi
2816         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
2817         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
2818         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
2819         _cflags_size="-O2 -Munroll=c:1 $opt_common"
2820         _cflags_noopt="-O1"
2821         _flags_filter=pgi_flags
2822     elif $_cc 2>&1 | grep -q Microsoft; then
2823         _type=msvc
2824         _ident=$($cc 2>&1 | head -n1)
2825         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
2826         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
2827         _cflags_speed="-O2"
2828         _cflags_size="-O1"
2829         if $_cc 2>&1 | grep -q Linker; then
2830             _ld_o='-out:$@'
2831         else
2832             _ld_o='-Fe$@'
2833         fi
2834         _cc_o='-Fo$@'
2835         _cc_e='-P -Fi$@'
2836         _flags_filter=msvc_flags
2837         _ld_lib='lib%.a'
2838         _ld_path='-libpath:'
2839         _flags='-nologo'
2840         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64'
2841         if [ $pfx = hostcc ]; then
2842             append _cflags -Dsnprintf=_snprintf
2843         fi
2844     elif $_cc 2>&1 | grep -q Intel; then
2845         _type=icl
2846         _ident=$($cc 2>&1 | head -n1)
2847         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
2848         # Not only is O3 broken on 13.x+ but it is slower on all previous
2849         # versions (tested) as well.
2850         _cflags_speed="-O2"
2851         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
2852         if $_cc 2>&1 | grep -q Linker; then
2853             _ld_o='-out:$@'
2854         else
2855             _ld_o='-Fe$@'
2856         fi
2857         _cc_o='-Fo$@'
2858         _cc_e='-P'
2859         _flags_filter=icl_flags
2860         _ld_lib='lib%.a'
2861         _ld_path='-libpath:'
2862         # -Qdiag-error to make icl error when seeing certain unknown arguments
2863         _flags='-nologo -Qdiag-error:4044,10157'
2864         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
2865         # with MSVC which enables it by default.
2866         _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
2867         if [ $pfx = hostcc ]; then
2868             append _cflags -Dsnprintf=_snprintf
2869         fi
2870     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
2871         _type=cparser
2872         _ident=$($_cc --version | head -n1)
2873         _depflags='-MMD'
2874         _cflags_speed='-O4'
2875         _cflags_size='-O2'
2876         _flags_filter=cparser_flags
2877     fi
2878
2879     eval ${pfx}_type=\$_type
2880     eval ${pfx}_ident=\$_ident
2881 }
2882
2883 set_ccvars(){
2884     eval ${1}_C=\${_cc_c-\${${1}_C}}
2885     eval ${1}_E=\${_cc_e-\${${1}_E}}
2886     eval ${1}_O=\${_cc_o-\${${1}_O}}
2887
2888     if [ -n "$_depflags" ]; then
2889         eval ${1}_DEPFLAGS=\$_depflags
2890     else
2891         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
2892         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
2893         eval DEP${1}FLAGS=\$_flags
2894     fi
2895 }
2896
2897 probe_cc cc "$cc"
2898 cflags_filter=$_flags_filter
2899 cflags_speed=$_cflags_speed
2900 cflags_size=$_cflags_size
2901 cflags_noopt=$_cflags_noopt
2902 add_cflags $_flags $_cflags
2903 cc_ldflags=$_ldflags
2904 set_ccvars CC
2905
2906 probe_cc hostcc "$host_cc"
2907 host_cflags_filter=$_flags_filter
2908 add_host_cflags  $_flags $_cflags
2909 set_ccvars HOSTCC
2910
2911 test -n "$cc_type" && enable $cc_type ||
2912     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
2913
2914 : ${as_default:=$cc}
2915 : ${dep_cc_default:=$cc}
2916 : ${ld_default:=$cc}
2917 : ${host_ld_default:=$host_cc}
2918 set_default ar as dep_cc ld host_ld
2919
2920 probe_cc as "$as"
2921 asflags_filter=$_flags_filter
2922 add_asflags $_flags $_cflags
2923 set_ccvars AS
2924
2925 probe_cc ld "$ld"
2926 ldflags_filter=$_flags_filter
2927 add_ldflags $_flags $_ldflags
2928 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
2929 LD_O=${_ld_o-$LD_O}
2930 LD_LIB=${_ld_lib-$LD_LIB}
2931 LD_PATH=${_ld_path-$LD_PATH}
2932
2933 probe_cc hostld "$host_ld"
2934 host_ldflags_filter=$_flags_filter
2935 add_host_ldflags $_flags $_ldflags
2936 HOSTLD_O=${_ld_o-$HOSTLD_O}
2937
2938 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
2939     probe_cc depcc "$dep_cc"
2940     CCDEP=${_DEPCMD:-$DEPCMD}
2941     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
2942     DEPCCFLAGS=$_flags
2943 fi
2944
2945 if $ar 2>&1 | grep -q Microsoft; then
2946     arflags="-nologo"
2947     ar_o='-out:$@'
2948 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
2949     arflags="rq"
2950     ar_o='$@'
2951 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
2952     arflags='-Xany -r -c'
2953     ar_o='$@'
2954 else
2955     arflags="rc"
2956     ar_o='$@'
2957 fi
2958
2959 add_cflags $extra_cflags
2960 add_asflags $extra_cflags
2961
2962 if test -n "$sysroot"; then
2963     case "$cc_type" in
2964         gcc|llvm_gcc|clang)
2965             add_cppflags --sysroot="$sysroot"
2966             add_ldflags --sysroot="$sysroot"
2967         ;;
2968         tms470)
2969             add_cppflags -I"$sysinclude"
2970             add_ldflags  --sysroot="$sysroot"
2971         ;;
2972     esac
2973 fi
2974
2975 if test "$cpu" = host; then
2976     enabled cross_compile &&
2977         die "--cpu=host makes no sense when cross-compiling."
2978
2979     case "$cc_type" in
2980         gcc|llvm_gcc)
2981             check_native(){
2982                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
2983                 sed -n "/cc1.*$1=/{
2984                             s/.*$1=\\([^ ]*\\).*/\\1/
2985                             p
2986                             q
2987                         }" $TMPE
2988             }
2989             cpu=$(check_native -march || check_native -mcpu)
2990         ;;
2991     esac
2992
2993     test "${cpu:-host}" = host &&
2994         die "--cpu=host not supported with compiler $cc"
2995 fi
2996
2997 # Deal with common $arch aliases
2998 case "$arch" in
2999     aarch64|arm64)
3000         arch="aarch64"
3001     ;;
3002     arm*)
3003         arch="arm"
3004     ;;
3005     mips*|IP*)
3006         arch="mips"
3007     ;;
3008     parisc*|hppa*)
3009         arch="parisc"
3010     ;;
3011     "Power Macintosh"|ppc*|powerpc*)
3012         arch="ppc"
3013     ;;
3014     s390|s390x)
3015         arch="s390"
3016     ;;
3017     sh4|sh)
3018         arch="sh4"
3019     ;;
3020     sun4u|sparc*)
3021         arch="sparc"
3022     ;;
3023     tilegx|tile-gx)
3024         arch="tilegx"
3025     ;;
3026     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3027         arch="x86"
3028     ;;
3029 esac
3030
3031 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3032 enable $arch
3033
3034 # Add processor-specific flags
3035 if enabled aarch64; then
3036
3037     case $cpu in
3038         armv*)
3039             cpuflags="-march=$cpu"
3040         ;;
3041         *)
3042             cpuflags="-mcpu=$cpu"
3043         ;;
3044     esac
3045
3046 elif enabled alpha; then
3047
3048     cpuflags="-mcpu=$cpu"
3049
3050 elif enabled arm; then
3051
3052     check_arm_arch() {
3053         check_cpp_condition stddef.h \
3054             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3055             $cpuflags
3056     }
3057
3058     probe_arm_arch() {
3059         if   check_arm_arch 4;        then echo armv4;
3060         elif check_arm_arch 4T;       then echo armv4t;
3061         elif check_arm_arch 5;        then echo armv5;
3062         elif check_arm_arch 5E;       then echo armv5e;
3063         elif check_arm_arch 5T;       then echo armv5t;
3064         elif check_arm_arch 5TE;      then echo armv5te;
3065         elif check_arm_arch 5TEJ;     then echo armv5te;
3066         elif check_arm_arch 6;        then echo armv6;
3067         elif check_arm_arch 6J;       then echo armv6j;
3068         elif check_arm_arch 6K;       then echo armv6k;
3069         elif check_arm_arch 6Z;       then echo armv6z;
3070         elif check_arm_arch 6ZK;      then echo armv6zk;
3071         elif check_arm_arch 6T2;      then echo armv6t2;
3072         elif check_arm_arch 7;        then echo armv7;
3073         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3074         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3075         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3076         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3077         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3078         fi
3079     }
3080
3081     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3082
3083     case $cpu in
3084         armv*)
3085             cpuflags="-march=$cpu"
3086             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3087         ;;
3088         *)
3089             cpuflags="-mcpu=$cpu"
3090             case $cpu in
3091                 cortex-a*)                               subarch=armv7a  ;;
3092                 cortex-r*)                               subarch=armv7r  ;;
3093                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3094                 arm11*)                                  subarch=armv6   ;;
3095                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3096                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3097                 *)                             subarch=$(probe_arm_arch) ;;
3098             esac
3099         ;;
3100     esac
3101
3102     case "$subarch" in
3103         armv5t*)    enable fast_clz                ;;
3104         armv[6-8]*) enable fast_clz fast_unaligned ;;
3105     esac
3106
3107 elif enabled avr32; then
3108
3109     case $cpu in
3110         ap7[02]0[0-2])
3111             subarch="avr32_ap"
3112             cpuflags="-mpart=$cpu"
3113         ;;
3114         ap)
3115             subarch="avr32_ap"
3116             cpuflags="-march=$cpu"
3117         ;;
3118         uc3[ab]*)
3119             subarch="avr32_uc"
3120             cpuflags="-mcpu=$cpu"
3121         ;;
3122         uc)
3123             subarch="avr32_uc"
3124             cpuflags="-march=$cpu"
3125         ;;
3126     esac
3127
3128 elif enabled bfin; then
3129
3130     cpuflags="-mcpu=$cpu"
3131
3132 elif enabled mips; then
3133
3134     cpuflags="-march=$cpu"
3135
3136 elif enabled ppc; then
3137
3138     case $(tolower $cpu) in
3139         601|ppc601|powerpc601)
3140             cpuflags="-mcpu=601"
3141             disable altivec
3142         ;;
3143         603*|ppc603*|powerpc603*)
3144             cpuflags="-mcpu=603"
3145             disable altivec
3146         ;;
3147         604*|ppc604*|powerpc604*)
3148             cpuflags="-mcpu=604"
3149             disable altivec
3150         ;;
3151         g3|75*|ppc75*|powerpc75*)
3152             cpuflags="-mcpu=750"
3153             disable altivec
3154         ;;
3155         g4|745*|ppc745*|powerpc745*)
3156             cpuflags="-mcpu=7450"
3157         ;;
3158         74*|ppc74*|powerpc74*)
3159             cpuflags="-mcpu=7400"
3160         ;;
3161         g5|970|ppc970|powerpc970)
3162             cpuflags="-mcpu=970"
3163         ;;
3164         power[3-7]*)
3165             cpuflags="-mcpu=$cpu"
3166         ;;
3167         cell)
3168             cpuflags="-mcpu=cell"
3169             enable ldbrx
3170         ;;
3171         e500mc)
3172             cpuflags="-mcpu=e500mc"
3173             disable altivec
3174         ;;
3175         e500v2)
3176             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3177             disable altivec
3178         ;;
3179         e500)
3180             cpuflags="-mcpu=8540 -mhard-float"
3181             disable altivec
3182         ;;
3183     esac
3184
3185 elif enabled sparc; then
3186
3187     case $cpu in
3188         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3189             cpuflags="-mcpu=$cpu"
3190         ;;
3191         ultrasparc*|niagara[234])
3192             cpuflags="-mcpu=$cpu"
3193         ;;
3194     esac
3195
3196 elif enabled x86; then
3197
3198     case $cpu in
3199         i[345]86|pentium)
3200             cpuflags="-march=$cpu"
3201             disable mmx
3202         ;;
3203         # targets that do NOT support nopl and conditional mov (cmov)
3204         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3205             cpuflags="-march=$cpu"
3206             disable i686
3207         ;;
3208         # targets that do support nopl and conditional mov (cmov)
3209         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3210             cpuflags="-march=$cpu"
3211             enable i686
3212             enable fast_cmov
3213         ;;
3214         # targets that do support conditional mov but on which it's slow
3215         pentium4|pentium4m|prescott|nocona)
3216             cpuflags="-march=$cpu"
3217             enable i686
3218             disable fast_cmov
3219         ;;
3220     esac
3221
3222 fi
3223
3224 if [ "$cpu" != generic ]; then
3225     add_cflags  $cpuflags
3226     add_asflags $cpuflags
3227 fi
3228
3229 # compiler sanity check
3230 check_exec <<EOF
3231 int main(void){ return 0; }
3232 EOF
3233 if test "$?" != 0; then
3234     echo "$cc is unable to create an executable file."
3235     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3236         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3237         echo "Only do this if you know what cross compiling means."
3238     fi
3239     die "C compiler test failed."
3240 fi
3241
3242 add_cppflags -D_ISOC99_SOURCE
3243 check_cflags -std=c99
3244 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3245 #include <stdlib.h>
3246 EOF
3247 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3248 #include <stdlib.h>
3249 EOF
3250
3251 add_host_cppflags -D_ISOC99_SOURCE
3252 check_host_cflags -std=c99
3253 check_host_cflags -Wall
3254 check_host_cflags -O3
3255
3256 check_64bit(){
3257     arch32=$1
3258     arch64=$2
3259     expr=$3
3260     check_code cc "" "int test[2*($expr) - 1]" &&
3261         subarch=$arch64 || subarch=$arch32
3262 }
3263
3264 case "$arch" in
3265     aarch64|alpha|ia64)
3266         spic=$shared
3267     ;;
3268     mips)
3269         check_64bit mips mips64 '_MIPS_SIM > 1'
3270         spic=$shared
3271     ;;
3272     parisc)
3273         check_64bit parisc parisc64 'sizeof(void *) > 4'
3274         spic=$shared
3275     ;;
3276     ppc)
3277         check_64bit ppc ppc64 'sizeof(void *) > 4'
3278         spic=$shared
3279     ;;
3280     s390)
3281         check_64bit s390 s390x 'sizeof(void *) > 4'
3282         spic=$shared
3283     ;;
3284     sparc)
3285         check_64bit sparc sparc64 'sizeof(void *) > 4'
3286         spic=$shared
3287     ;;
3288     x86)
3289         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3290         if test "$subarch" = "x86_64"; then
3291             spic=$shared
3292         fi
3293     ;;
3294 esac
3295
3296 enable $subarch
3297 enabled spic && enable_weak pic
3298
3299 # OS specific
3300 case $target_os in
3301     aix)
3302         SHFLAGS=-shared
3303         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3304         enabled shared && add_ldflags -Wl,-brtl
3305         ;;
3306     haiku)
3307         prefix_default="/boot/common"
3308         network_extralibs="-lnetwork"
3309         host_libs=
3310         ;;
3311     sunos)
3312         SHFLAGS='-shared -Wl,-h,$$(@F)'
3313         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3314         network_extralibs="-lsocket -lnsl"
3315         # When using suncc to build, the Solaris linker will mark
3316         # an executable with each instruction set encountered by
3317         # the Solaris assembler.  As our libraries contain their own
3318         # guards for processor-specific code, instead suppress
3319         # generation of the HWCAPS ELF section on Solaris x86 only.
3320         enabled_all suncc x86 &&
3321             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3322             add_ldflags -Wl,-M,mapfile
3323         nm_default='nm -P -g'
3324         ;;
3325     netbsd)
3326         disable symver
3327         oss_indev_extralibs="-lossaudio"
3328         oss_outdev_extralibs="-lossaudio"
3329         ;;
3330     openbsd|bitrig)
3331         disable symver
3332         SHFLAGS='-shared'
3333         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3334         SLIB_INSTALL_LINKS=
3335         oss_indev_extralibs="-lossaudio"
3336         oss_outdev_extralibs="-lossaudio"
3337         ;;
3338     dragonfly)
3339         disable symver
3340         ;;
3341     freebsd)
3342         ;;
3343     bsd/os)
3344         add_extralibs -lpoll -lgnugetopt
3345         ;;
3346     darwin)
3347         gas="gas-preprocessor.pl $cc"
3348         enabled ppc && add_asflags -force_cpusubtype_ALL
3349         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3350         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3351         add_ldflags -Wl,-dynamic,-search_paths_first
3352         SLIBSUF=".dylib"
3353         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3354         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3355         objformat="macho"
3356         enabled x86_64 && objformat="macho64"
3357         enabled_any pic shared ||
3358             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3359         ;;
3360     mingw32*)
3361         if test $target_os = "mingw32ce"; then
3362             disable network
3363         else
3364             target_os=mingw32
3365         fi
3366         LIBTARGET=i386
3367         if enabled x86_64; then
3368             LIBTARGET="i386:x86-64"
3369         elif enabled arm; then
3370             LIBTARGET=arm-wince
3371         fi
3372         check_ldflags -Wl,--nxcompat
3373         check_ldflags -Wl,--dynamicbase
3374         shlibdir_default="$bindir_default"
3375         SLIBPREF=""
3376         SLIBSUF=".dll"
3377         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3378         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3379         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3380         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3381         SLIB_INSTALL_LINKS=
3382         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3383         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3384         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3385         objformat="win32"
3386         dlltool="${cross_prefix}dlltool"
3387         ranlib=:
3388         enable dos_paths
3389         ;;
3390     win32|win64)
3391         disable symver
3392         if enabled shared; then
3393             # Link to the import library instead of the normal static library
3394             # for shared libs.
3395             LD_LIB='%.lib'
3396             # Cannot build both shared and static libs with MSVC or icl.
3397             disable static
3398         fi
3399         shlibdir_default="$bindir_default"
3400         SLIBPREF=""
3401         SLIBSUF=".dll"
3402         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3403         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3404         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3405         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3406         SLIB_INSTALL_LINKS=
3407         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3408         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3409         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3410         objformat="win32"
3411         ranlib=:
3412         enable dos_paths
3413         ;;
3414     cygwin*)
3415         target_os=cygwin
3416         shlibdir_default="$bindir_default"
3417         SLIBPREF="cyg"
3418         SLIBSUF=".dll"
3419         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3420         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3421         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3422         SLIB_INSTALL_LINKS=
3423         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3424         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3425         objformat="win32"
3426         enable dos_paths
3427         ;;
3428     *-dos|freedos|opendos)
3429         network_extralibs="-lsocket"
3430         objformat="coff"
3431         enable dos_paths
3432         add_cppflags -U__STRICT_ANSI__
3433         ;;
3434     linux)
3435         enable dv1394
3436         ;;
3437     irix*)
3438         target_os=irix
3439         ranlib="echo ignoring ranlib"
3440         ;;
3441     os/2*)
3442         ln_s="cp -f"
3443         objformat="aout"
3444         add_cppflags -D_GNU_SOURCE
3445         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3446         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3447         LIBSUF="_s.a"
3448         SLIBPREF=""
3449         SLIBSUF=".dll"
3450         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3451         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3452         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3453             echo PROTMODE >> $(SUBDIR)$(NAME).def; \
3454             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3455             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3456             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3457             emxexp -o $(OBJS) >> $(SUBDIR)$(NAME).def'
3458         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3459             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3460         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3461         enable dos_paths
3462         ;;
3463     gnu/kfreebsd)
3464         add_cppflags -D_BSD_SOURCE
3465         ;;
3466     gnu)
3467         ;;
3468     qnx)
3469         add_cppflags -D_QNX_SOURCE
3470         network_extralibs="-lsocket"
3471         ;;
3472     symbian)
3473         SLIBSUF=".dll"
3474         enable dos_paths
3475         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3476         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3477         add_ldflags -Wl,--target1-abs,--no-undefined \
3478                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3479                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3480         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3481                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3482                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3483         ;;
3484     osf1)
3485         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3486         ;;
3487     minix)
3488         ;;
3489     plan9)
3490         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3491                      -D_REENTRANT_SOURCE        \
3492                      -D_RESEARCH_SOURCE         \
3493                      -DFD_SETSIZE=96            \
3494                      -DHAVE_SOCK_OPTS
3495         add_compat strtod.o strtod=avpriv_strtod
3496         network_extralibs='-lbsd'
3497         exeobjs=compat/plan9/main.o
3498         disable avserver
3499         cp_f='cp'
3500         ;;
3501     none)
3502         ;;
3503     *)
3504         die "Unknown OS '$target_os'."
3505         ;;
3506 esac
3507
3508 # determine libc flavour
3509
3510 probe_libc(){
3511     pfx=$1
3512     pfx_no_=${pfx%_}
3513     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3514     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3515         eval ${pfx}libc_type=uclibc
3516         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3517     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3518         eval ${pfx}libc_type=glibc
3519         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3520     # MinGW headers can be installed on Cygwin, so check for newlib first.
3521     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3522         eval ${pfx}libc_type=newlib
3523         add_${pfx}cppflags -U__STRICT_ANSI__
3524     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3525     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3526         eval ${pfx}libc_type=mingw64
3527         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3528         eval test \$${pfx_no_}cc_type = "gcc" &&
3529             add_${pfx}cppflags -D__printf__=__gnu_printf__
3530     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3531          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3532         eval ${pfx}libc_type=mingw32
3533         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3534             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3535             die "ERROR: MinGW32 runtime version must be >= 3.15."
3536         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3537         eval test \$${pfx_no_}cc_type = "gcc" &&
3538             add_${pfx}cppflags -D__printf__=__gnu_printf__
3539     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3540         eval ${pfx}libc_type=msvcrt
3541         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3542         # 0x601 by default unless something else is set by the user.
3543         # This can easily lead to us detecting functions only present
3544         # in such new versions and producing binaries requiring windows 7.0.
3545         # Therefore explicitly set the default to XP unless the user has
3546         # set something else on the command line.
3547         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3548             add_${pfx}cppflags -D_WIN32_WINNT=0x0502
3549     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3550         eval ${pfx}libc_type=klibc
3551     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3552         eval ${pfx}libc_type=bionic
3553     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3554         eval ${pfx}libc_type=solaris
3555         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3556     fi
3557 }
3558
3559 probe_libc
3560 test -n "$libc_type" && enable libc_$libc_type
3561 probe_libc host_
3562 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3563
3564 case $libc_type in
3565     bionic)
3566         add_compat strtod.o strtod=avpriv_strtod
3567         ;;
3568     msvcrt)
3569         add_compat strtod.o strtod=avpriv_strtod
3570         add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3571                                      _snprintf=avpriv_snprintf  \
3572                                      vsnprintf=avpriv_vsnprintf
3573         ;;
3574 esac
3575
3576 # hacks for compiler/libc/os combinations
3577
3578 if enabled_all tms470 libc_glibc; then
3579     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3580     add_cppflags -D__USER_LABEL_PREFIX__=
3581     add_cppflags -D__builtin_memset=memset
3582     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3583     add_cflags   -pds=48    # incompatible redefinition of macro
3584 fi
3585
3586 if enabled_all ccc libc_glibc; then
3587     add_ldflags -Wl,-z,now  # calls to libots crash without this
3588 fi
3589
3590 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3591     add_cppflags '-I\$(SRC_PATH)/compat/float'
3592
3593 esc(){
3594     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3595 }
3596
3597 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3598
3599 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3600
3601 set_default $PATHS_LIST
3602 set_default nm
3603
3604 # we need to build at least one lib type
3605 if ! enabled_any static shared; then
3606     cat <<EOF
3607 At least one library type must be built.
3608 Specify --enable-static to build the static libraries or --enable-shared to
3609 build the shared libraries as well. To only build the shared libraries specify
3610 --disable-static in addition to --enable-shared.
3611 EOF
3612     exit 1;
3613 fi
3614
3615 die_license_disabled() {
3616     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3617 }
3618
3619 die_license_disabled gpl libcdio
3620 die_license_disabled gpl libx264
3621 die_license_disabled gpl libx265
3622 die_license_disabled gpl libxavs
3623 die_license_disabled gpl libxvid
3624 die_license_disabled gpl x11grab
3625
3626 die_license_disabled nonfree libfaac
3627 die_license_disabled nonfree libfdk_aac
3628 die_license_disabled nonfree openssl
3629
3630 die_license_disabled version3 libopencore_amrnb
3631 die_license_disabled version3 libopencore_amrwb
3632 die_license_disabled version3 libvo_aacenc
3633 die_license_disabled version3 libvo_amrwbenc
3634
3635 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3636
3637 disabled optimizations || check_cflags -fomit-frame-pointer
3638
3639 enable_weak_pic() {
3640     disabled pic && return
3641     enable pic
3642     add_cppflags -DPIC
3643     case "$target_os" in
3644     mingw*|cygwin*)
3645         ;;
3646     *)
3647         add_cflags -fPIC
3648         ;;
3649     esac
3650     add_asflags  -fPIC
3651 }
3652
3653 enabled pic && enable_weak_pic
3654
3655 check_cc <<EOF || die "Symbol mangling check failed."
3656 int ff_extern;
3657 EOF
3658 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3659 extern_prefix=${sym%%ff_extern*}
3660
3661 check_cc <<EOF && enable_weak inline_asm
3662 void foo(void) { __asm__ volatile ("" ::); }
3663 EOF
3664
3665 _restrict=
3666 for restrict_keyword in restrict __restrict__ __restrict; do
3667     check_cc <<EOF && _restrict=$restrict_keyword && break
3668 void foo(char * $restrict_keyword p);
3669 EOF
3670 done
3671
3672 check_cc <<EOF && enable pragma_deprecated
3673 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3674 EOF
3675
3676 check_cc <<EOF && enable attribute_packed
3677 struct { int x; } __attribute__((packed)) x;
3678 EOF
3679
3680 check_cc <<EOF && enable attribute_may_alias
3681 union { int x; } __attribute__((may_alias)) x;
3682 EOF
3683
3684 check_cc <<EOF || die "endian test failed"
3685 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3686 EOF
3687 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3688
3689 check_inline_asm inline_asm_labels '"1:\n"'
3690
3691 if enabled aarch64; then
3692     # internal assembler in clang 3.3 does not support this instruction
3693     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
3694     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
3695
3696     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
3697
3698 elif enabled alpha; then
3699
3700     check_cflags -mieee
3701
3702 elif enabled arm; then
3703
3704     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
3705     enabled thumb && check_cflags -mthumb || check_cflags -marm
3706     nogas=die
3707
3708     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
3709         enable vfp_args
3710     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__"; then
3711         case "${cross_prefix:-$cc}" in
3712             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
3713             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
3714 __asm__ (".eabi_attribute 28, 1");
3715 int main(void) { return 0; }
3716 EOF
3717         esac
3718         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
3719     fi
3720
3721     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
3722     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
3723     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
3724     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
3725     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
3726     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
3727
3728     [ $target_os = linux ] ||
3729         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
3730             $ARCH_EXT_LIST_ARM
3731
3732     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
3733
3734     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
3735
3736 elif enabled mips; then
3737
3738     check_inline_asm loongson '"dmult.g $1, $2, $3"'
3739
3740 elif enabled parisc; then
3741
3742     if enabled gcc; then
3743         case $($cc -dumpversion) in
3744             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
3745         esac
3746     fi
3747
3748 elif enabled ppc; then
3749
3750     enable local_aligned_8 local_aligned_16
3751
3752     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
3753     check_inline_asm ibm_asm   '"add 0, 0, 0"'
3754     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
3755     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
3756
3757     # AltiVec flags: The FSF version of GCC differs from the Apple version
3758     if enabled altivec; then
3759         nogas=warn
3760         check_cflags -maltivec -mabi=altivec &&
3761         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
3762         check_cflags -faltivec
3763
3764         # check if our compiler supports Motorola AltiVec C API
3765         check_cc <<EOF || disable altivec
3766 $inc_altivec_h
3767 int main(void) {
3768     vector signed int v1 = (vector signed int) { 0 };
3769     vector signed int v2 = (vector signed int) { 1 };
3770     v1 = vec_add(v1, v2);
3771     return 0;
3772 }
3773 EOF
3774
3775         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
3776     fi
3777
3778 elif enabled x86; then
3779
3780     check_builtin rdtsc    intrin.h   "__rdtsc()"
3781     check_builtin mm_empty mmintrin.h "_mm_empty()"
3782
3783     enable local_aligned_8 local_aligned_16
3784
3785     # check whether EBP is available on x86
3786     # As 'i' is stored on the stack, this program will crash
3787     # if the base pointer is used to access it because the
3788     # base pointer is cleared in the inline assembly code.
3789     check_exec_crash <<EOF && enable ebp_available
3790 volatile int i=0;
3791 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
3792 return i;
3793 EOF
3794
3795     # check whether EBX is available on x86
3796     check_inline_asm ebx_available '""::"b"(0)' &&
3797         check_inline_asm ebx_available '"":::"%ebx"'
3798
3799     # check whether xmm clobbers are supported
3800     check_inline_asm xmm_clobbers '"":::"%xmm0"'
3801
3802     # check whether binutils is new enough to compile SSSE3/MMXEXT
3803     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
3804     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
3805
3806     if ! disabled_any asm mmx yasm; then
3807         if check_cmd $yasmexe --version; then
3808             enabled x86_64 && yasm_extra="-m amd64"
3809             yasm_debug="-g dwarf2"
3810         elif check_cmd nasm -v; then
3811             yasmexe=nasm
3812             yasm_debug="-g -F dwarf"
3813             enabled x86_64 && test "$objformat" = elf && objformat=elf64
3814         fi
3815
3816         YASMFLAGS="-f $objformat $yasm_extra"
3817         enabled pic               && append YASMFLAGS "-DPIC"
3818         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
3819         case "$objformat" in
3820             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
3821         esac
3822
3823         check_yasm "movbe ecx, [5]" && enable yasm ||
3824             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
3825         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
3826         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
3827         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
3828         check_yasm "CPU amdnop" || disable cpunop
3829     fi
3830
3831     case "$cpu" in
3832         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
3833             disable fast_clz
3834         ;;
3835     esac
3836
3837 fi
3838
3839 if enabled asm; then
3840     as=${gas:=$as}
3841     check_as <<EOF && enable gnu_as || \
3842         $nogas "GNU assembler not found, install gas-preprocessor"
3843 .macro m n
3844 \n: .int 0
3845 .endm
3846 m x
3847 EOF
3848 fi
3849
3850 check_ldflags -Wl,--as-needed
3851
3852 if check_func dlopen; then
3853     ldl=
3854 elif check_func dlopen -ldl; then
3855     ldl=-ldl
3856 fi
3857
3858 if ! disabled network; then
3859     check_func getaddrinfo $network_extralibs
3860     check_func getservbyport $network_extralibs
3861     check_func inet_aton $network_extralibs
3862
3863     check_type netdb.h "struct addrinfo"
3864     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
3865     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
3866     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
3867     check_type poll.h "struct pollfd"
3868     check_type netinet/sctp.h "struct sctp_event_subscribe"
3869     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
3870     check_type netinet/in.h "struct sockaddr_in6"
3871     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
3872     check_type "sys/types.h sys/socket.h" socklen_t
3873
3874     # Prefer arpa/inet.h over winsock2
3875     if check_header arpa/inet.h ; then
3876         check_func closesocket
3877     elif check_header winsock2.h ; then
3878         check_func_headers winsock2.h closesocket -lws2 &&
3879             network_extralibs="-lws2" ||
3880         { check_func_headers winsock2.h closesocket -lws2_32 &&
3881             network_extralibs="-lws2_32"; } || disable winsock2_h network
3882         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
3883
3884         check_type ws2tcpip.h socklen_t
3885         check_type ws2tcpip.h "struct addrinfo"
3886         check_type ws2tcpip.h "struct group_source_req"
3887         check_type ws2tcpip.h "struct ip_mreq_source"
3888         check_type ws2tcpip.h "struct ipv6_mreq"
3889         check_type winsock2.h "struct pollfd"
3890         check_struct winsock2.h "struct sockaddr" sa_len
3891         check_type ws2tcpip.h "struct sockaddr_in6"
3892         check_type ws2tcpip.h "struct sockaddr_storage"
3893     else
3894         disable network
3895     fi
3896 fi
3897
3898 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
3899 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
3900 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
3901 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
3902
3903 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
3904 check_func  ${malloc_prefix}memalign            && enable memalign
3905 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
3906
3907 check_func  fcntl
3908 check_func  fork
3909 check_func  gethrtime
3910 check_func  getopt
3911 check_func  getrusage
3912 check_func  gettimeofday
3913 check_func  isatty
3914 check_func  localtime_r
3915 check_func  mach_absolute_time
3916 check_func  mkstemp
3917 check_func  mmap
3918 check_func  mprotect
3919 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
3920 check_func  nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
3921 check_func  sched_getaffinity
3922 check_func  setrlimit
3923 check_func  strerror_r
3924 check_func  strptime
3925 check_func  sysconf
3926 check_func  sysctl
3927 check_func  usleep
3928
3929 check_func_headers io.h setmode
3930 check_func_headers stdlib.h getenv
3931
3932 check_func_headers windows.h GetProcessAffinityMask
3933 check_func_headers windows.h GetProcessTimes
3934 check_func_headers windows.h GetSystemTimeAsFileTime
3935 check_func_headers windows.h MapViewOfFile
3936 check_func_headers windows.h SetConsoleTextAttribute
3937 check_func_headers windows.h Sleep
3938 check_func_headers windows.h VirtualAlloc
3939
3940 check_header direct.h
3941 check_header dlfcn.h
3942 check_header dxva.h
3943 check_header dxva2api.h
3944 check_header io.h
3945 check_header mach/mach_time.h
3946 check_header malloc.h
3947 check_header poll.h
3948 check_header sys/mman.h
3949 check_header sys/param.h
3950 check_header sys/resource.h
3951 check_header sys/select.h
3952 check_header sys/time.h
3953 check_header sys/un.h
3954 check_header unistd.h
3955 check_header vdpau/vdpau.h
3956 check_header vdpau/vdpau_x11.h
3957 check_header VideoDecodeAcceleration/VDADecoder.h
3958 check_header windows.h
3959 check_header X11/extensions/XvMClib.h
3960
3961 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
3962 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
3963 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
3964
3965 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
3966
3967 if ! disabled w32threads && ! enabled pthreads; then
3968     check_func_headers "windows.h process.h" _beginthreadex &&
3969         enable w32threads || disable w32threads
3970 fi
3971
3972 # check for some common methods of building with pthread support
3973 # do this before the optional library checks as some of them require pthreads
3974 if ! disabled pthreads && ! enabled w32threads; then
3975     enable pthreads
3976     if check_func pthread_join -pthread; then
3977         add_cflags -pthread
3978         add_extralibs -pthread
3979     elif check_func pthread_join -pthreads; then
3980         add_cflags -pthreads
3981         add_extralibs -pthreads
3982     elif check_func pthread_join -lpthreadGC2; then
3983         add_extralibs -lpthreadGC2
3984     elif check_lib pthread.h pthread_join -lpthread; then
3985         :
3986     elif ! check_func pthread_join; then
3987         disable pthreads
3988     fi
3989 fi
3990
3991 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
3992 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
3993
3994 check_lib math.h sin -lm && LIBM="-lm"
3995 enabled vaapi && require vaapi va/va.h vaInitialize -lva
3996
3997 atan2f_args=2
3998 ldexpf_args=2
3999 powf_args=2
4000
4001 for func in $MATH_FUNCS; do
4002     eval check_mathfunc $func \${${func}_args:-1}
4003 done
4004
4005 # these are off by default, so fail if requested and not available
4006 enabled avisynth          && { { check_header "avisynth/avisynth_c.h" && check_lib2 "windows.h" LoadLibrary; } ||
4007                                { check_header "avxsynth/avxsynth_c.h" && check_lib2 "dlfcn.h" dlopen -ldl; } ||
4008                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4009 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4010 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4011 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4012 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
4013 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4014 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4015                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4016                                done || die "ERROR: libgsm not found"; }
4017 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4018 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4019 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4020 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4021 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4022 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg; } ||
4023                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version; } }
4024 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4025 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4026 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4027 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4028 enabled libspeex          && require libspeex speex/speex.h speex_decoder_init -lspeex
4029 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4030 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4031 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4032 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4033 enabled libvpx            && {
4034     enabled libvpx_vp8_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
4035                                     die "ERROR: libvpx decoder version must be >=0.9.1"; }
4036     enabled libvpx_vp8_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_enc_init_ver VPX_CQ" -lvpx ||
4037                                     die "ERROR: libvpx encoder version must be >=0.9.6"; }
4038     enabled libvpx_vp9_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx" -lvpx || disable libvpx_vp9_decoder; }
4039     enabled libvpx_vp9_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_vp9_cx" -lvpx || disable libvpx_vp9_encoder; } }
4040 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack