build: Add missing audio_frame_queue dependency for libwavpack encoder
[libav.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:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-outdevs           show all available output devices
77   --list-filters           show all available filters
78
79 Standard options:
80   --logfile=FILE           log tests and output to FILE [config.log]
81   --disable-logging        do not log configure debug information
82   --prefix=PREFIX          install in PREFIX [$prefix_default]
83   --bindir=DIR             install binaries in DIR [PREFIX/bin]
84   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
85   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
86   --libdir=DIR             install libs in DIR [PREFIX/lib]
87   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
88   --incdir=DIR             install includes in DIR [PREFIX/include]
89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
90   --enable-rpath           use rpath when linking programs (USE WITH CARE)
91
92 Licensing options:
93   --enable-gpl             allow use of GPL code, the resulting libs
94                            and binaries will be under GPL [no]
95   --enable-version3        upgrade (L)GPL to version 3 [no]
96   --enable-nonfree         allow use of nonfree code, the resulting libs
97                            and binaries will be unredistributable [no]
98
99 Configuration options:
100   --disable-static         do not build static libraries [no]
101   --enable-shared          build shared libraries [no]
102   --enable-small           optimize for size instead of speed
103   --enable-runtime-cpudetect detect CPU capabilities at runtime (bigger binary)
104   --enable-gray            enable full grayscale support (slower color)
105   --disable-swscale-alpha  disable alpha channel support in swscale
106   --disable-all            disable building components, libraries and programs
107
108 Program options:
109   --disable-programs       do not build command line programs
110   --disable-avconv         disable avconv build
111   --disable-avplay         disable avplay build
112   --disable-avprobe        disable avprobe build
113   --disable-avserver       deprecated, does nothing
114
115 Component options:
116   --disable-doc            do not build documentation
117   --disable-pod2man        do not build manual pages
118   --disable-texi2html      do not build HTML documentation
119   --disable-avdevice       disable libavdevice build
120   --disable-avcodec        disable libavcodec build
121   --disable-avformat       disable libavformat build
122   --disable-avutil         disable libavutil build
123   --disable-swscale        disable libswscale build
124   --disable-avfilter       disable video filter support [no]
125   --disable-avresample     disable libavresample build [no]
126   --disable-pthreads       disable pthreads [auto]
127   --disable-w32threads     disable Win32 threads [auto]
128   --disable-network        disable network support [no]
129   --disable-dct            disable DCT code
130   --disable-error-resilience disable error resilience code
131   --disable-lsp            disable LSP code
132   --disable-lzo            disable LZO decoder code
133   --disable-mdct           disable MDCT code
134   --disable-rdft           disable RDFT code
135   --disable-fft            disable FFT code
136   --disable-faan           disable floating point AAN (I)DCT code
137
138 Individual component options:
139   --disable-everything     disable all components listed below
140   --disable-encoder=NAME   disable encoder NAME
141   --enable-encoder=NAME    enable encoder NAME
142   --disable-encoders       disable all encoders
143   --disable-decoder=NAME   disable decoder NAME
144   --enable-decoder=NAME    enable decoder NAME
145   --disable-decoders       disable all decoders
146   --disable-hwaccel=NAME   disable hwaccel NAME
147   --enable-hwaccel=NAME    enable hwaccel NAME
148   --disable-hwaccels       disable all hwaccels
149   --disable-muxer=NAME     disable muxer NAME
150   --enable-muxer=NAME      enable muxer NAME
151   --disable-muxers         disable all muxers
152   --disable-demuxer=NAME   disable demuxer NAME
153   --enable-demuxer=NAME    enable demuxer NAME
154   --disable-demuxers       disable all demuxers
155   --enable-parser=NAME     enable parser NAME
156   --disable-parser=NAME    disable parser NAME
157   --disable-parsers        disable all parsers
158   --enable-bsf=NAME        enable bitstream filter NAME
159   --disable-bsf=NAME       disable bitstream filter NAME
160   --disable-bsfs           disable all bitstream filters
161   --enable-protocol=NAME   enable protocol NAME
162   --disable-protocol=NAME  disable protocol NAME
163   --disable-protocols      disable all protocols
164   --enable-indev=NAME      enable input device NAME
165   --disable-indev=NAME     disable input device NAME
166   --disable-indevs         disable input devices
167   --enable-outdev=NAME     enable output device NAME
168   --disable-outdev=NAME    disable output device NAME
169   --disable-outdevs        disable output devices
170   --disable-devices        disable all devices
171   --enable-filter=NAME     enable filter NAME
172   --disable-filter=NAME    disable filter NAME
173   --disable-filters        disable all filters
174
175 External library support:
176
177   Using any of the following switches will allow Libav to link to the
178   corresponding external library. All the components depending on that library
179   will become enabled, if all their other dependencies are met and they are not
180   explicitly disabled. E.g. --enable-libwavpack will enable linking to
181   libwavpack and allow the libwavpack encoder to be built, unless it is
182   specifically disabled with --disable-encoder=libwavpack.
183
184   Note that only the system libraries are auto-detected. All the other external
185   libraries must be explicitly enabled.
186
187   Also note that the following help text describes the purpose of the libraries
188   themselves, not all their features will necessarily be usable by Libav.
189
190   --enable-avisynth          video frameserver
191   --enable-bzlib             bzip2 compression [autodetect]
192   --enable-frei0r            video filtering plugins
193   --enable-gnutls            crypto
194   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
195   --enable-libcdio           audio CD input
196   --enable-libdc1394         IEEE 1394/Firewire camera input
197   --enable-libdcadec         DCA audio decoding
198   --enable-libfaac           AAC audio encoding
199   --enable-libfdk-aac        AAC audio encoding/decoding
200   --enable-libfontconfig     font configuration and management
201   --enable-libfreetype       font rendering
202   --enable-libgsm            GSM audio encoding/decoding
203   --enable-libhdcd           HDCD decoding filter
204   --enable-libilbc           ILBC audio encoding/decoding
205   --enable-libkvazaar        HEVC video encoding
206   --enable-libmp3lame        MP3 audio encoding
207   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
208   --enable-libopencore-amrwb AMR-WB audio decoding
209   --enable-libopencv         computer vision
210   --enable-libopenh264       H.264 video encoding/decoding
211   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
212   --enable-libopus           Opus audio encoding/decoding
213   --enable-libpulse          Pulseaudio sound server
214   --enable-librtmp           RTMP streaming
215   --enable-libschroedinger   Dirac video encoding/decoding
216   --enable-libsnappy         snappy compression
217   --enable-libspeex          Speex audio encoding/decoding
218   --enable-libtheora         Theora video encoding/decoding
219   --enable-libtwolame        MP2 audio encoding
220   --enable-libvo-aacenc      AAC audio encoding
221   --enable-libvo-amrwbenc    AMR-WB audio encoding
222   --enable-libvorbis         Vorbis audio encoding/decoding
223   --enable-libvpx            VP* video encoding/decoding
224   --enable-libwavpack        Wavpack audio encoding/decoding
225   --enable-libwebp           WebP image encoding/decoding
226   --enable-libx264           H.264 video encoding
227   --enable-libx265           HEVC video encoding
228   --enable-libxavs           Chinese AVS video encoding
229   --enable-libxcb            X window system protocol communication
230   --enable-libxcb-shm        X11 shm communication [auto]
231   --enable-libxcb-xfixes     X11 mouse rendering [auto]
232   --enable-libxvid           MPEG-4 ASP video encoding
233   --enable-openssl           crypto
234   --enable-zlib              compression [autodetect]
235
236   The following libraries provide various hardware acceleration features:
237   --enable-cuda    Nvidia CUDA (dynamically linked)
238   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
239   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
240   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
241   --enable-libnpp  Nvidia CUDA processing
242   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
243   --enable-nvenc   Nvidia video encoding
244   --enable-omx     OpenMAX IL
245   --enable-omx-rpi OpenMAX IL for Raspberry Pi
246   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
247   --enable-vda     Apple Video Decode Acceleration [auto]
248   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
249
250 Toolchain options:
251   --arch=ARCH              select architecture [$arch]
252   --cpu=CPU                select the minimum required CPU (affects
253                            instruction selection, may crash on older CPUs)
254   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
255   --enable-cross-compile   assume a cross-compiler is used
256   --sysroot=PATH           root of cross-build tree
257   --sysinclude=PATH        location of cross-build system headers
258   --target-os=OS           compiler targets OS [$target_os]
259   --target-exec=CMD        command to run executables on target
260   --target-path=DIR        path to view of build directory on target
261   --target-samples=DIR     path to samples directory on target
262   --toolchain=NAME         set tool defaults according to NAME
263   --nm=NM                  use nm tool
264   --ar=AR                  use archive tool AR [$ar_default]
265   --as=AS                  use assembler AS [$as_default]
266   --cc=CC                  use C compiler CC [$cc_default]
267   --objcc=OCC              use ObjC compiler OCC [$cc_default]
268   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
269   --ld=LD                  use linker LD
270   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
271   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
272   --host-cc=HOSTCC         use host C compiler HOSTCC
273   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
274   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
275   --host-ld=HOSTLD         use host linker HOSTLD
276   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
277   --host-libs=HLIBS        use libs HLIBS when linking for host
278   --host-os=OS             compiler host OS [$target_os]
279   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
280   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
281   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
282   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
283   --extra-libs=ELIBS       add ELIBS [$ELIBS]
284   --extra-version=STRING   version string suffix []
285   --optflags=OPTFLAGS      override optimization-related compiler flags
286   --enable-pic             build position-independent code
287   --enable-thumb           compile for Thumb instruction set
288   --enable-lto             use link-time optimization
289   --env="ENV=override"     override the environment variables
290
291 Advanced options (experts only):
292   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
293   --custom-allocator=NAME  use a supported custom allocator
294   --disable-symver         disable symbol versioning
295   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
296   --disable-safe-bitstream-reader
297                            disable buffer boundary checking in bitreaders
298                            (faster, but may crash)
299   --enable-sram            allow use of on-chip SRAM
300
301 Optimization options (experts only):
302   --disable-asm            disable all assembly optimizations
303   --disable-altivec        disable AltiVec optimizations
304   --disable-vsx            disable VSX optimizations
305   --disable-power8         disable POWER8 optimizations
306   --disable-amd3dnow       disable 3DNow! optimizations
307   --disable-amd3dnowext    disable 3DNow! extended optimizations
308   --disable-mmx            disable MMX optimizations
309   --disable-mmxext         disable MMXEXT optimizations
310   --disable-sse            disable SSE optimizations
311   --disable-sse2           disable SSE2 optimizations
312   --disable-sse3           disable SSE3 optimizations
313   --disable-ssse3          disable SSSE3 optimizations
314   --disable-sse4           disable SSE4 optimizations
315   --disable-sse42          disable SSE4.2 optimizations
316   --disable-avx            disable AVX optimizations
317   --disable-xop            disable XOP optimizations
318   --disable-fma3           disable FMA3 optimizations
319   --disable-fma4           disable FMA4 optimizations
320   --disable-avx2           disable AVX2 optimizations
321   --disable-armv5te        disable armv5te optimizations
322   --disable-armv6          disable armv6 optimizations
323   --disable-armv6t2        disable armv6t2 optimizations
324   --disable-vfp            disable VFP optimizations
325   --disable-neon           disable NEON optimizations
326   --disable-inline-asm     disable use of inline assembly
327   --disable-yasm           disable use of nasm/yasm assembly
328
329 Developer options (useful when working on Libav itself):
330   --disable-debug          disable debugging symbols
331   --enable-debug=LEVEL     set the debug level [$debuglevel]
332   --disable-optimizations  disable compiler optimizations
333   --enable-extra-warnings  enable more compiler warnings
334   --samples=PATH           location of test samples for FATE, if not set use
335                            \$LIBAV_SAMPLES at make invocation time.
336   --enable-neon-clobber-test check NEON registers for clobbering (should be
337                            used only for debugging purposes)
338   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
339                            should be used only for debugging purposes)
340   --enable-random          randomly enable/disable components
341   --disable-random
342   --enable-random=LIST     randomly enable/disable specific components or
343   --disable-random=LIST    component groups. LIST is a comma-separated list
344                            of NAME[:PROB] entries where NAME is a component
345                            (group) and PROB the probability associated with
346                            NAME (default 0.5).
347   --random-seed=VALUE      seed value for --enable/disable-random
348   --disable-valgrind-backtrace do not print a backtrace under Valgrind
349                            (only applies to --disable-optimizations builds)
350
351 NOTE: Object files are built at the place where configure is launched.
352 EOF
353   exit 0
354 }
355
356 quotes='""'
357
358 log(){
359     echo "$@" >> $logfile
360 }
361
362 log_file(){
363     log BEGIN $1
364     i=1
365     while read line; do
366         printf '%5s   %s\n' "${i}" "${line}"
367         i=$(($i+1))
368     done < $1 >> $logfile
369     log END $1
370 }
371
372 echolog(){
373     log "$@"
374     echo "$@"
375 }
376
377 warn(){
378     log "WARNING: $*"
379     WARNINGS="${WARNINGS}WARNING: $*\n"
380 }
381
382 die(){
383     echolog "$@"
384     cat <<EOF
385
386 If you think configure made a mistake, make sure you are using the latest
387 version from Git.  If the latest version fails, report the problem to the
388 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
389 EOF
390     if disabled logging; then
391         cat <<EOF
392 Rerun configure with logging enabled (do not use --disable-logging), and
393 include the log this produces with your report.
394 EOF
395     else
396         cat <<EOF
397 Include the log file "$logfile" produced by configure as this will help
398 solving the problem.
399 EOF
400     fi
401     exit 1
402 }
403
404 # Avoid locale weirdness, besides we really just want to translate ASCII.
405 toupper(){
406     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
407 }
408
409 tolower(){
410     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
411 }
412
413 c_escape(){
414     echo "$*" | sed 's/["\\]/\\\0/g'
415 }
416
417 sh_quote(){
418     v=$(echo "$1" | sed "s/'/'\\\\''/g")
419     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
420     echo "$v"
421 }
422
423 cleanws(){
424     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
425 }
426
427 filter(){
428     pat=$1
429     shift
430     for v; do
431         eval "case $v in $pat) printf '%s ' $v ;; esac"
432     done
433 }
434
435 filter_out(){
436     pat=$1
437     shift
438     for v; do
439         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
440     done
441 }
442
443 map(){
444     m=$1
445     shift
446     for v; do eval $m; done
447 }
448
449 add_suffix(){
450     suffix=$1
451     shift
452     for v; do echo ${v}${suffix}; done
453 }
454
455 set_all(){
456     value=$1
457     shift
458     for var in $*; do
459         eval $var=$value
460     done
461 }
462
463 set_weak(){
464     value=$1
465     shift
466     for var; do
467         eval : \${$var:=$value}
468     done
469 }
470
471 sanitize_var_name(){
472     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
473 }
474
475 set_safe(){
476     var=$1
477     shift
478     eval $(sanitize_var_name "$var")='$*'
479 }
480
481 get_safe(){
482     eval echo \$$(sanitize_var_name "$1")
483 }
484
485 pushvar(){
486     for pvar in $*; do
487         eval level=\${${pvar}_level:=0}
488         eval ${pvar}_${level}="\$$pvar"
489         eval ${pvar}_level=$(($level+1))
490     done
491 }
492
493 popvar(){
494     for pvar in $*; do
495         eval level=\${${pvar}_level:-0}
496         test $level = 0 && continue
497         eval level=$(($level-1))
498         eval $pvar="\${${pvar}_${level}}"
499         eval ${pvar}_level=$level
500         eval unset ${pvar}_${level}
501     done
502 }
503
504 enable(){
505     set_all yes $*
506 }
507
508 disable(){
509     set_all no $*
510 }
511
512 enable_weak(){
513     set_weak yes $*
514 }
515
516 disable_weak(){
517     set_weak no $*
518 }
519
520 enable_safe(){
521     for var; do
522         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
523     done
524 }
525
526 disable_safe(){
527     for var; do
528         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
529     done
530 }
531
532 do_enable_deep(){
533     for var; do
534         enabled $var && continue
535         eval sel="\$${var}_select"
536         eval sgs="\$${var}_suggest"
537         pushvar var sgs
538         enable_deep $sel
539         popvar sgs
540         enable_deep_weak $sgs
541         popvar var
542     done
543 }
544
545 enable_deep(){
546     do_enable_deep $*
547     enable $*
548 }
549
550 enable_deep_weak(){
551     for var; do
552         disabled $var && continue
553         pushvar var
554         do_enable_deep $var
555         popvar var
556         enable_weak $var
557     done
558 }
559
560 enabled(){
561     test "${1#!}" = "$1" && op== || op=!=
562     eval test "x\$${1#!}" $op "xyes"
563 }
564
565 disabled(){
566     test "${1#!}" = "$1" && op== || op=!=
567     eval test "x\$${1#!}" $op "xno"
568 }
569
570 enabled_all(){
571     for opt; do
572         enabled $opt || return 1
573     done
574 }
575
576 disabled_all(){
577     for opt; do
578         disabled $opt || return 1
579     done
580 }
581
582 enabled_any(){
583     for opt; do
584         enabled $opt && return 0
585     done
586 }
587
588 disabled_any(){
589     for opt; do
590         disabled $opt && return 0
591     done
592     return 1
593 }
594
595 set_default(){
596     for opt; do
597         eval : \${$opt:=\$${opt}_default}
598     done
599 }
600
601 is_in(){
602     value=$1
603     shift
604     for var in $*; do
605         [ $var = $value ] && return 0
606     done
607     return 1
608 }
609
610 do_check_deps(){
611     for cfg; do
612         cfg="${cfg#!}"
613         enabled ${cfg}_checking && die "Circular dependency for $cfg."
614         disabled ${cfg}_checking && continue
615         enable ${cfg}_checking
616         append allopts $cfg
617
618         eval dep_all="\$${cfg}_deps"
619         eval dep_any="\$${cfg}_deps_any"
620         eval dep_sel="\$${cfg}_select"
621         eval dep_sgs="\$${cfg}_suggest"
622         eval dep_ifa="\$${cfg}_if"
623         eval dep_ifn="\$${cfg}_if_any"
624
625         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
626         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
627         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
628
629         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
630         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
631         enabled_all  $dep_all || disable $cfg
632         enabled_any  $dep_any || disable $cfg
633         disabled_any $dep_sel && disable $cfg
634
635         if enabled $cfg; then
636             enable_deep $dep_sel
637             enable_deep_weak $dep_sgs
638         fi
639
640         disable ${cfg}_checking
641     done
642 }
643
644 check_deps(){
645     unset allopts
646
647     do_check_deps "$@"
648
649     for cfg in $allopts; do
650         enabled $cfg || continue
651         eval dep_extralibs="\$${cfg}_extralibs"
652         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
653     done
654 }
655
656 print_config(){
657     pfx=$1
658     files=$2
659     shift 2
660     map 'eval echo "$v \${$v:-no}"' "$@" |
661     awk "BEGIN { split(\"$files\", files) }
662         {
663             c = \"$pfx\" toupper(\$1);
664             v = \$2;
665             sub(/yes/, 1, v);
666             sub(/no/,  0, v);
667             for (f in files) {
668                 file = files[f];
669                 if (file ~ /\\.h\$/) {
670                     printf(\"#define %s %d\\n\", c, v) >>file;
671                 } else if (file ~ /\\.asm\$/) {
672                     printf(\"%%define %s %d\\n\", c, v) >>file;
673                 } else if (file ~ /\\.mak\$/) {
674                     n = -v ? \"\" : \"!\";
675                     printf(\"%s%s=yes\\n\", n, c) >>file;
676                 }
677             }
678         }"
679 }
680
681 print_enabled(){
682     suf=$1
683     shift
684     for v; do
685         enabled $v && printf "%s\n" ${v%$suf}
686     done
687 }
688
689 append(){
690     var=$1
691     shift
692     eval "$var=\"\$$var $*\""
693 }
694
695 prepend(){
696     var=$1
697     shift
698     eval "$var=\"$* \$$var\""
699 }
700
701 unique(){
702     var=$1
703     uniq_list=""
704     for tok in $(eval echo \$$var); do
705         uniq_list="$(filter_out $tok $uniq_list) $tok"
706     done
707     eval "$var=\"${uniq_list}\""
708 }
709
710 add_cppflags(){
711     append CPPFLAGS "$@"
712 }
713
714 add_cflags(){
715     append CFLAGS $($cflags_filter "$@")
716 }
717
718 add_asflags(){
719     append ASFLAGS $($asflags_filter "$@")
720 }
721
722 add_objcflags(){
723     append OBJCFLAGS $($objcflags_filter "$@")
724 }
725
726 add_ldflags(){
727     append LDFLAGS $($ldflags_filter "$@")
728 }
729
730 add_ldexeflags(){
731     append LDEXEFLAGS $($ldflags_filter "$@")
732 }
733
734 add_stripflags(){
735     append STRIPFLAGS "$@"
736 }
737
738 add_extralibs(){
739     prepend extralibs $($ldflags_filter "$@")
740 }
741
742 add_host_cppflags(){
743     append host_cppflags "$@"
744 }
745
746 add_host_cflags(){
747     append host_cflags $($host_cflags_filter "$@")
748 }
749
750 add_host_ldflags(){
751     append host_ldflags $($host_ldflags_filter "$@")
752 }
753
754 add_compat(){
755     append compat_objs $1
756     shift
757     map 'add_cppflags -D$v' "$@"
758 }
759
760 check_cmd(){
761     log "$@"
762     "$@" >> $logfile 2>&1
763 }
764
765 cc_o(){
766     eval printf '%s\\n' $CC_O
767 }
768
769 cc_e(){
770     eval printf '%s\\n' $CC_E
771 }
772
773 check_cc(){
774     log check_cc "$@"
775     cat > $TMPC
776     log_file $TMPC
777     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
778 }
779
780 check_objcc(){
781     log check_objcc "$@"
782     cat > $TMPC
783     log_file $TMPC
784     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
785 }
786
787 check_cpp(){
788     log check_cpp "$@"
789     cat > $TMPC
790     log_file $TMPC
791     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
792 }
793
794 as_o(){
795     eval printf '%s\\n' $AS_O
796 }
797
798 check_as(){
799     log check_as "$@"
800     cat > $TMPS
801     log_file $TMPS
802     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
803 }
804
805 check_inline_asm(){
806     log check_inline_asm "$@"
807     name="$1"
808     code="$2"
809     shift 2
810     disable $name
811     check_cc "$@" <<EOF && enable $name
812 void foo(void){ __asm__ volatile($code); }
813 EOF
814 }
815
816 check_insn(){
817     log check_insn "$@"
818     check_inline_asm ${1}_inline "\"$2\""
819     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
820 }
821
822 check_yasm(){
823     log check_yasm "$@"
824     echo "$1" > $TMPS
825     log_file $TMPS
826     shift 1
827     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
828 }
829
830 ld_o(){
831     eval printf '%s\\n' $LD_O
832 }
833
834 check_ld(){
835     log check_ld "$@"
836     flags=$(filter_out '-l*' "$@")
837     libs=$(filter '-l*' "$@")
838     check_cc $($cflags_filter $flags) || return
839     flags=$($ldflags_filter $flags)
840     libs=$($ldflags_filter $libs)
841     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
842 }
843
844 print_include(){
845     hdr=$1
846     test "${hdr%.h}" = "${hdr}" &&
847         echo "#include $hdr"    ||
848         echo "#include <$hdr>"
849 }
850
851 check_code(){
852     log check_code "$@"
853     check=$1
854     headers=$2
855     code=$3
856     shift 3
857     {
858         for hdr in $headers; do
859             print_include $hdr
860         done
861         echo "int main(void) { $code; return 0; }"
862     } | check_$check "$@"
863 }
864
865 check_cppflags(){
866     log check_cppflags "$@"
867     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
868 int x;
869 EOF
870 }
871
872 test_cflags(){
873     log test_cflags "$@"
874     set -- $($cflags_filter "$@")
875     check_cc "$@" <<EOF
876 int x;
877 EOF
878 }
879
880 check_cflags(){
881     log check_cflags "$@"
882     test_cflags "$@" && add_cflags "$@"
883 }
884
885 test_objcflags(){
886     log test_objcflags "$@"
887     set -- $($objcflags_filter "$@")
888     check_objcc "$@" <<EOF
889 int x;
890 EOF
891 }
892
893 check_objcflags(){
894     log check_objcflags "$@"
895     test_objcflags "$@" && add_objcflags "$@"
896 }
897
898 test_ldflags(){
899     log test_ldflags "$@"
900     check_ld "$@" <<EOF
901 int main(void){ return 0; }
902 EOF
903 }
904
905 check_ldflags(){
906     log check_ldflags "$@"
907     test_ldflags "$@" && add_ldflags "$@"
908 }
909
910 test_stripflags(){
911     log test_stripflags "$@"
912     # call check_cc to get a fresh TMPO
913     check_cc <<EOF
914 int main(void) { return 0; }
915 EOF
916     check_cmd $strip $STRIPFLAGS "$@" $TMPO
917 }
918
919 check_stripflags(){
920     log check_stripflags "$@"
921     test_stripflags "$@" && add_stripflags "$@"
922 }
923
924 check_header(){
925     log check_header "$@"
926     header=$1
927     shift
928     disable_safe $header
929     check_cpp "$@" <<EOF && enable_safe $header
930 #include <$header>
931 int x;
932 EOF
933 }
934
935 check_func(){
936     log check_func "$@"
937     func=$1
938     shift
939     disable $func
940     check_ld "$@" <<EOF && enable $func
941 extern int $func();
942 int main(void){ $func(); }
943 EOF
944 }
945
946 check_mathfunc(){
947     log check_mathfunc "$@"
948     func=$1
949     narg=$2
950     shift 2
951     test $narg = 2 && args="f, g" || args="f"
952     disable $func
953     check_ld "$@" <<EOF && enable $func
954 #include <math.h>
955 float foo(float f, float g) { return $func($args); }
956 int main(void){ return 0; }
957 EOF
958 }
959
960 check_func_headers(){
961     log check_func_headers "$@"
962     headers=$1
963     funcs=$2
964     shift 2
965     {
966         for hdr in $headers; do
967             print_include $hdr
968         done
969         for func in $funcs; do
970             echo "long check_$func(void) { return (long) $func; }"
971         done
972         echo "int main(void) { return 0; }"
973     } | check_ld "$@" && enable $funcs && enable_safe $headers
974 }
975
976 check_cpp_condition(){
977     log check_cpp_condition "$@"
978     header=$1
979     condition=$2
980     shift 2
981     check_cpp "$@" <<EOF
982 #include <$header>
983 #if !($condition)
984 #error "unsatisfied condition: $condition"
985 #endif
986 EOF
987 }
988
989 test_cflags_cpp(){
990     log test_cflags_cpp "$@"
991     flags=$1
992     condition=$2
993     shift 2
994     set -- $($cflags_filter "$flags")
995     check_cpp "$@" <<EOF
996 #if !($condition)
997 #error "unsatisfied condition: $condition"
998 #endif
999 EOF
1000 }
1001
1002 check_lib(){
1003     log check_lib "$@"
1004     headers="$1"
1005     funcs="$2"
1006     shift 2
1007     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1008 }
1009
1010 check_pkg_config(){
1011     log check_pkg_config "$@"
1012     pkg="$1"
1013     headers="$2"
1014     funcs="$3"
1015     shift 3
1016     check_cmd $pkg_config --exists --print-errors $pkg || return
1017     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1018     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1019     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1020         set_safe "${pkg}_cflags" $pkg_cflags   &&
1021         set_safe "${pkg}_libs"   $pkg_libs
1022 }
1023
1024 check_exec(){
1025     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1026 }
1027
1028 check_exec_crash(){
1029     log check_exec_crash "$@"
1030     code=$(cat)
1031
1032     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1033     # are safe but may not be available everywhere.  Thus we use
1034     # raise(SIGTERM) instead.  The check is run in a subshell so we
1035     # can redirect the "Terminated" message from the shell.  SIGBUS
1036     # is not defined by standard C so it is used conditionally.
1037
1038     (check_exec "$@") >> $logfile 2>&1 <<EOF
1039 #include <signal.h>
1040 static void sighandler(int sig){
1041     raise(SIGTERM);
1042 }
1043 int foo(void){
1044     $code
1045 }
1046 int (*func_ptr)(void) = foo;
1047 int main(void){
1048     signal(SIGILL, sighandler);
1049     signal(SIGFPE, sighandler);
1050     signal(SIGSEGV, sighandler);
1051 #ifdef SIGBUS
1052     signal(SIGBUS, sighandler);
1053 #endif
1054     return func_ptr();
1055 }
1056 EOF
1057 }
1058
1059 check_type(){
1060     log check_type "$@"
1061     headers=$1
1062     type=$2
1063     shift 2
1064     disable_safe "$type"
1065     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1066 }
1067
1068 check_struct(){
1069     log check_struct "$@"
1070     headers=$1
1071     struct=$2
1072     member=$3
1073     shift 3
1074     disable_safe "${struct}_${member}"
1075     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1076         enable_safe "${struct}_${member}"
1077 }
1078
1079 check_builtin(){
1080     log check_builtin "$@"
1081     name=$1
1082     headers=$2
1083     builtin=$3
1084     shift 3
1085     disable "$name"
1086     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1087 }
1088
1089 check_compile_assert(){
1090     log check_compile_assert "$@"
1091     name=$1
1092     headers=$2
1093     condition=$3
1094     shift 3
1095     disable "$name"
1096     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1097 }
1098
1099 require(){
1100     log require "$@"
1101     name="$1"
1102     headers="$2"
1103     func="$3"
1104     shift 3
1105     check_lib "$headers" $func "$@" || die "ERROR: $name not found"
1106 }
1107
1108 require_pkg_config(){
1109     log require_pkg_config "$@"
1110     pkg="$1"
1111     check_pkg_config "$@" || die "ERROR: $pkg not found"
1112     add_cflags    $(get_safe "${pkg}_cflags")
1113     add_extralibs $(get_safe "${pkg}_libs")
1114 }
1115
1116 hostcc_e(){
1117     eval printf '%s\\n' $HOSTCC_E
1118 }
1119
1120 hostcc_o(){
1121     eval printf '%s\\n' $HOSTCC_O
1122 }
1123
1124 check_host_cc(){
1125     log check_host_cc "$@"
1126     cat > $TMPC
1127     log_file $TMPC
1128     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1129 }
1130
1131 check_host_cpp(){
1132     log check_host_cpp "$@"
1133     cat > $TMPC
1134     log_file $TMPC
1135     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1136 }
1137
1138 check_host_cppflags(){
1139     log check_host_cppflags "$@"
1140     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1141 int x;
1142 EOF
1143 }
1144
1145 check_host_cflags(){
1146     log check_host_cflags "$@"
1147     set -- $($host_cflags_filter "$@")
1148     check_host_cc "$@" <<EOF && append host_cflags "$@"
1149 int x;
1150 EOF
1151 }
1152
1153 check_host_cpp_condition(){
1154     log check_host_cpp_condition "$@"
1155     header=$1
1156     condition=$2
1157     shift 2
1158     check_host_cpp "$@" <<EOF
1159 #include <$header>
1160 #if !($condition)
1161 #error "unsatisfied condition: $condition"
1162 #endif
1163 EOF
1164 }
1165
1166 apply(){
1167     file=$1
1168     shift
1169     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1170 }
1171
1172 cp_if_changed(){
1173     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1174     mkdir -p "$(dirname $2)"
1175     cp -f "$1" "$2"
1176 }
1177
1178 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1179 # system-dependent things.
1180
1181 AVCODEC_COMPONENTS="
1182     bsfs
1183     decoders
1184     encoders
1185     hwaccels
1186     parsers
1187 "
1188
1189 AVDEVICE_COMPONENTS="
1190     indevs
1191     outdevs
1192 "
1193 AVFILTER_COMPONENTS="
1194     filters
1195 "
1196 AVFORMAT_COMPONENTS="
1197     demuxers
1198     muxers
1199     protocols
1200 "
1201
1202 AVRESAMPLE_COMPONENTS=""
1203 AVUTIL_COMPONENTS=""
1204
1205 COMPONENT_LIST="
1206     $AVCODEC_COMPONENTS
1207     $AVDEVICE_COMPONENTS
1208     $AVFILTER_COMPONENTS
1209     $AVFORMAT_COMPONENTS
1210     $AVRESAMPLE_COMPONENTS
1211     $AVUTIL_COMPONENTS
1212 "
1213
1214 EXAMPLE_LIST="
1215     decode_audio_example
1216     decode_video_example
1217     encode_audio_example
1218     encode_video_example
1219     filter_audio_example
1220     metadata_example
1221     output_example
1222     qsvdec_example
1223     transcode_aac_example
1224 "
1225
1226 HWACCEL_LIBRARY_NONFREE_LIST="
1227     cuda
1228     libnpp
1229 "
1230 HWACCEL_LIBRARY_LIST="
1231     $HWACCEL_LIBRARY_NONFREE_LIST
1232     d3d11va
1233     dxva2
1234     libmfx
1235     mmal
1236     nvenc
1237     omx
1238     vaapi
1239     vda
1240     vdpau
1241 "
1242
1243 EXTERNAL_LIBRARY_GPL_LIST="
1244     libcdio
1245     libx264
1246     libx265
1247     libxavs
1248     libxvid
1249 "
1250
1251 EXTERNAL_LIBRARY_NONFREE_LIST="
1252     libfaac
1253     libfdk_aac
1254     openssl
1255 "
1256
1257 EXTERNAL_LIBRARY_VERSION3_LIST="
1258     libopencore_amrnb
1259     libopencore_amrwb
1260     libvo_aacenc
1261     libvo_amrwbenc
1262 "
1263
1264 EXTERNAL_LIBRARY_LIST="
1265     $EXTERNAL_LIBRARY_GPL_LIST
1266     $EXTERNAL_LIBRARY_NONFREE_LIST
1267     $EXTERNAL_LIBRARY_VERSION3_LIST
1268     avisynth
1269     bzlib
1270     frei0r
1271     gnutls
1272     libbs2b
1273     libdc1394
1274     libdcadec
1275     libfontconfig
1276     libfreetype
1277     libgsm
1278     libhdcd
1279     libilbc
1280     libkvazaar
1281     libmp3lame
1282     libopencv
1283     libopenh264
1284     libopenjpeg
1285     libopus
1286     libpulse
1287     librtmp
1288     libschroedinger
1289     libsnappy
1290     libspeex
1291     libtheora
1292     libtwolame
1293     libvorbis
1294     libvpx
1295     libwavpack
1296     libwebp
1297     libxcb
1298     libxcb_shm
1299     libxcb_xfixes
1300     zlib
1301 "
1302
1303 FEATURE_LIST="
1304     gray
1305     hardcoded_tables
1306     omx_rpi
1307     runtime_cpudetect
1308     safe_bitstream_reader
1309     shared
1310     small
1311     sram
1312     static
1313     swscale_alpha
1314 "
1315
1316 LIBRARY_LIST="
1317     avcodec
1318     avdevice
1319     avfilter
1320     avformat
1321     avresample
1322     avutil
1323     swscale
1324 "
1325
1326 LICENSE_LIST="
1327     gpl
1328     nonfree
1329     version3
1330 "
1331
1332 PROGRAM_LIST="
1333     avconv
1334     avplay
1335     avprobe
1336 "
1337
1338 SUBSYSTEM_LIST="
1339     dct
1340     doc
1341     error_resilience
1342     faan
1343     fft
1344     lsp
1345     lzo
1346     mdct
1347     network
1348     rdft
1349 "
1350
1351 CONFIG_LIST="
1352     $COMPONENT_LIST
1353     $EXAMPLE_LIST
1354     $EXTERNAL_LIBRARY_LIST
1355     $HWACCEL_LIBRARY_LIST
1356     $FEATURE_LIST
1357     $LICENSE_LIST
1358     $LIBRARY_LIST
1359     $PROGRAM_LIST
1360     $SUBSYSTEM_LIST
1361     neon_clobber_test
1362     pic
1363     pod2man
1364     texi2html
1365     thumb
1366     valgrind_backtrace
1367     xmm_clobber_test
1368 "
1369
1370 THREADS_LIST="
1371     pthreads
1372     w32threads
1373 "
1374
1375 ATOMICS_LIST="
1376     atomics_gcc
1377     atomics_suncc
1378     atomics_win32
1379 "
1380
1381 ARCH_LIST="
1382     aarch64
1383     alpha
1384     arm
1385     avr32
1386     avr32_ap
1387     avr32_uc
1388     bfin
1389     ia64
1390     m68k
1391     mips
1392     mips64
1393     parisc
1394     ppc
1395     ppc64
1396     s390
1397     sh4
1398     sparc
1399     sparc64
1400     tilegx
1401     tilepro
1402     tomi
1403     x86
1404     x86_32
1405     x86_64
1406 "
1407
1408 ARCH_EXT_LIST_ARM="
1409     armv5te
1410     armv6
1411     armv6t2
1412     armv8
1413     neon
1414     vfp
1415     vfpv3
1416 "
1417
1418 ARCH_EXT_LIST_X86_SIMD="
1419     amd3dnow
1420     amd3dnowext
1421     avx
1422     avx2
1423     fma3
1424     fma4
1425     mmx
1426     mmxext
1427     sse
1428     sse2
1429     sse3
1430     sse4
1431     sse42
1432     ssse3
1433     xop
1434 "
1435
1436 ARCH_EXT_LIST_PPC="
1437     altivec
1438     dcbzl
1439     ldbrx
1440     power8
1441     ppc4xx
1442     vsx
1443 "
1444
1445 ARCH_EXT_LIST_X86="
1446     $ARCH_EXT_LIST_X86_SIMD
1447     cpunop
1448     i686
1449 "
1450
1451 ARCH_EXT_LIST_MIPS="
1452     loongson
1453     mips32r1
1454     mips64r1
1455     mips32r2
1456     mips64r2
1457     mips32r6
1458     mips64r6
1459 "
1460
1461 ARCH_EXT_LIST="
1462     $ARCH_EXT_LIST_ARM
1463     $ARCH_EXT_LIST_MIPS
1464     $ARCH_EXT_LIST_PPC
1465     $ARCH_EXT_LIST_X86
1466     vis
1467 "
1468
1469 ARCH_FEATURES="
1470     aligned_stack
1471     fast_64bit
1472     fast_clz
1473     fast_cmov
1474     local_aligned_8
1475     local_aligned_16
1476     local_aligned_32
1477     simd_align_16
1478     simd_align_32
1479 "
1480
1481 BUILTIN_LIST="
1482     atomic_cas_ptr
1483     machine_rw_barrier
1484     MemoryBarrier
1485     mm_empty
1486     rdtsc
1487     sem_timedwait
1488     sync_val_compare_and_swap
1489 "
1490 HAVE_LIST_CMDLINE="
1491     inline_asm
1492     symver
1493     yasm
1494 "
1495
1496 HAVE_LIST_PUB="
1497     bigendian
1498     fast_unaligned
1499 "
1500
1501 HEADERS_LIST="
1502     AVFoundation_AVFoundation_h
1503     alsa_asoundlib_h
1504     altivec_h
1505     arpa_inet_h
1506     cdio_paranoia_h
1507     cdio_paranoia_paranoia_h
1508     dispatch_dispatch_h
1509     dev_bktr_ioctl_bt848_h
1510     dev_bktr_ioctl_meteor_h
1511     dev_ic_bt8xx_h
1512     dev_video_bktr_ioctl_bt848_h
1513     dev_video_meteor_ioctl_meteor_h
1514     direct_h
1515     dlfcn_h
1516     d3d11_h
1517     dxva_h
1518     gsm_h
1519     io_h
1520     mach_mach_time_h
1521     machine_ioctl_bt848_h
1522     machine_ioctl_meteor_h
1523     malloc_h
1524     poll_h
1525     sndio_h
1526     soundcard_h
1527     stdatomic_h
1528     sys_mman_h
1529     sys_param_h
1530     sys_resource_h
1531     sys_select_h
1532     sys_soundcard_h
1533     sys_time_h
1534     sys_un_h
1535     sys_videoio_h
1536     unistd_h
1537     valgrind_valgrind_h
1538     windows_h
1539     winsock2_h
1540 "
1541
1542 INTRINSICS_LIST="
1543     intrinsics_neon
1544 "
1545
1546 MATH_FUNCS="
1547     atanf
1548     atan2f
1549     cbrtf
1550     cosf
1551     exp2
1552     exp2f
1553     expf
1554     isinf
1555     isnan
1556     ldexpf
1557     llrint
1558     llrintf
1559     log2
1560     log2f
1561     log10f
1562     lrint
1563     lrintf
1564     powf
1565     rint
1566     round
1567     roundf
1568     sinf
1569     trunc
1570     truncf
1571 "
1572
1573 SYSTEM_FUNCS="
1574     aligned_malloc
1575     clock_gettime
1576     closesocket
1577     CommandLineToArgvW
1578     CoTaskMemFree
1579     CryptGenRandom
1580     dlopen
1581     fcntl
1582     flt_lim
1583     fork
1584     getaddrinfo
1585     gethrtime
1586     getopt
1587     GetProcessAffinityMask
1588     GetProcessMemoryInfo
1589     GetProcessTimes
1590     getrusage
1591     GetSystemTimeAsFileTime
1592     gettimeofday
1593     gmtime_r
1594     inet_aton
1595     isatty
1596     jack_port_get_latency_range
1597     LoadLibrary
1598     localtime_r
1599     mach_absolute_time
1600     MapViewOfFile
1601     memalign
1602     mkstemp
1603     mmap
1604     mprotect
1605     nanosleep
1606     posix_memalign
1607     sched_getaffinity
1608     SetConsoleTextAttribute
1609     setmode
1610     setrlimit
1611     Sleep
1612     strerror_r
1613     sysconf
1614     sysctl
1615     usleep
1616     VirtualAlloc
1617 "
1618
1619 TOOLCHAIN_FEATURES="
1620     as_dn_directive
1621     as_fpu_directive
1622     as_func
1623     as_object_arch
1624     asm_mod_q
1625     attribute_may_alias
1626     attribute_packed
1627     ebp_available
1628     ebx_available
1629     gnu_as
1630     ibm_asm
1631     inline_asm_labels
1632     pragma_deprecated
1633     symver_asm_label
1634     symver_gnu_asm
1635     vfp_args
1636     xform_asm
1637     xmm_clobbers
1638 "
1639
1640 TYPES_LIST="
1641     CONDITION_VARIABLE_Ptr
1642     socklen_t
1643     struct_addrinfo
1644     struct_group_source_req
1645     struct_ip_mreq_source
1646     struct_ipv6_mreq
1647     struct_pollfd
1648     struct_rusage_ru_maxrss
1649     struct_sockaddr_in6
1650     struct_sockaddr_sa_len
1651     struct_sockaddr_storage
1652     struct_v4l2_frmivalenum_discrete
1653 "
1654
1655 HAVE_LIST="
1656     $ARCH_EXT_LIST
1657     $(add_suffix _external $ARCH_EXT_LIST)
1658     $(add_suffix _inline   $ARCH_EXT_LIST)
1659     $ARCH_FEATURES
1660     $BUILTIN_LIST
1661     $HAVE_LIST_CMDLINE
1662     $HAVE_LIST_PUB
1663     $HEADERS_LIST
1664     $INTRINSICS_LIST
1665     $MATH_FUNCS
1666     $SYSTEM_FUNCS
1667     $THREADS_LIST
1668     $TOOLCHAIN_FEATURES
1669     $TYPES_LIST
1670     dos_paths
1671     dxva2_lib
1672     libc_msvcrt
1673     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1674     sdl
1675     section_data_rel_ro
1676     threads
1677     vaapi_drm
1678     vaapi_x11
1679     vdpau_x11
1680 "
1681
1682 # options emitted with CONFIG_ prefix but not available on the command line
1683 CONFIG_EXTRA="
1684     aandcttables
1685     ac3dsp
1686     audio_frame_queue
1687     audiodsp
1688     blockdsp
1689     bswapdsp
1690     cabac
1691     dirac_parse
1692     dvprofile
1693     faandct
1694     faanidct
1695     fdctdsp
1696     flacdsp
1697     fmtconvert
1698     g722dsp
1699     gmp
1700     golomb
1701     gplv3
1702     h263dsp
1703     h264chroma
1704     h264dsp
1705     h264parse
1706     h264pred
1707     h264qpel
1708     hpeldsp
1709     huffman
1710     huffyuvdsp
1711     huffyuvencdsp
1712     idctdsp
1713     iirfilter
1714     imdct15
1715     intrax8
1716     iso_media
1717     ividsp
1718     jpegtables
1719     libx262
1720     lgplv3
1721     lpc
1722     lzf
1723     me_cmp
1724     mpeg_er
1725     mpegaudio
1726     mpegaudiodsp
1727     mpegaudioheader
1728     mpegvideo
1729     mpegvideoenc
1730     mss34dsp
1731     pixblockdsp
1732     qpeldsp
1733     qsv
1734     qsvdec
1735     qsvenc
1736     rangecoder
1737     riffdec
1738     riffenc
1739     rtpdec
1740     rtpenc_chain
1741     rv34dsp
1742     sinewin
1743     snappy
1744     srtp
1745     startcode
1746     texturedsp
1747     texturedspenc
1748     tpeldsp
1749     vaapi_encode
1750     vc1dsp
1751     videodsp
1752     vp3dsp
1753     vp56dsp
1754     vp8dsp
1755     wma_freqs
1756     wmv2dsp
1757 "
1758
1759 CMDLINE_SELECT="
1760     $ARCH_EXT_LIST
1761     $CONFIG_LIST
1762     $HAVE_LIST_CMDLINE
1763     $THREADS_LIST
1764     asm
1765     cross_compile
1766     debug
1767     extra_warnings
1768     logging
1769     lto
1770     optimizations
1771     rpath
1772 "
1773
1774 PATHS_LIST="
1775     bindir
1776     datadir
1777     docdir
1778     incdir
1779     libdir
1780     mandir
1781     prefix
1782     shlibdir
1783 "
1784
1785 CMDLINE_SET="
1786     $PATHS_LIST
1787     ar
1788     arch
1789     as
1790     cc
1791     objcc
1792     cpu
1793     cross_prefix
1794     custom_allocator
1795     dep_cc
1796     env
1797     extra_version
1798     host_cc
1799     host_cflags
1800     host_ld
1801     host_ldflags
1802     host_libs
1803     host_os
1804     ld
1805     logfile
1806     malloc_prefix
1807     nm
1808     optflags
1809     pkg_config
1810     pkg_config_flags
1811     random_seed
1812     samples
1813     sysinclude
1814     sysroot
1815     target_exec
1816     target_os
1817     target_path
1818     target_samples
1819     toolchain
1820 "
1821
1822 CMDLINE_APPEND="
1823     extra_cflags
1824     extra_objcflags
1825     host_cppflags
1826 "
1827
1828 # code dependency declarations
1829
1830 # architecture extensions
1831
1832 armv5te_deps="arm"
1833 armv6_deps="arm"
1834 armv6t2_deps="arm"
1835 armv8_deps="aarch64"
1836 neon_deps_any="aarch64 arm"
1837 intrinsics_neon_deps="neon"
1838 vfp_deps_any="aarch64 arm"
1839 vfpv3_deps="vfp"
1840
1841 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1842
1843 altivec_deps="ppc"
1844 ppc4xx_deps="ppc"
1845 vsx_deps="altivec"
1846 power8_deps="vsx"
1847
1848 cpunop_deps="i686"
1849 x86_64_select="i686"
1850 x86_64_suggest="fast_cmov"
1851
1852 amd3dnow_deps="mmx"
1853 amd3dnowext_deps="amd3dnow"
1854 i686_deps="x86"
1855 mmx_deps="x86"
1856 mmxext_deps="mmx"
1857 sse_deps="mmxext"
1858 sse2_deps="sse"
1859 sse3_deps="sse2"
1860 ssse3_deps="sse3"
1861 sse4_deps="ssse3"
1862 sse42_deps="sse4"
1863 avx_deps="sse42"
1864 xop_deps="avx"
1865 fma3_deps="avx"
1866 fma4_deps="avx"
1867 avx2_deps="avx"
1868
1869 mmx_external_deps="yasm"
1870 mmx_inline_deps="inline_asm"
1871 mmx_suggest="mmx_external mmx_inline"
1872
1873 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1874     eval dep=\$${ext}_deps
1875     eval ${ext}_external_deps='"${dep}_external"'
1876     eval ${ext}_inline_deps='"${dep}_inline"'
1877     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1878 done
1879
1880 aligned_stack_if_any="aarch64 ppc x86"
1881 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1882 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1883 fast_unaligned_if_any="aarch64 ppc x86"
1884 simd_align_16_if_any="altivec neon sse"
1885 simd_align_32_if_any="avx"
1886
1887 # system capabilities
1888 symver_if_any="symver_asm_label symver_gnu_asm"
1889 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1890
1891 # threading support
1892 atomics_gcc_if="sync_val_compare_and_swap"
1893 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1894 atomics_win32_if="MemoryBarrier"
1895 atomics_native_if_any="$ATOMICS_LIST"
1896 w32threads_deps="atomics_native"
1897 threads_if_any="$THREADS_LIST"
1898
1899 # subsystems
1900 dct_select="rdft"
1901 dirac_parse_select="golomb"
1902 error_resilience_select="me_cmp"
1903 faandct_deps="faan fdctdsp"
1904 faanidct_deps="faan idctdsp"
1905 h264dsp_select="startcode"
1906 intrax8_select="blockdsp idctdsp"
1907 mdct_select="fft"
1908 rdft_select="fft"
1909 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1910 mpeg_er_select="error_resilience"
1911 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1912 mpegaudiodsp_select="dct"
1913 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1914 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1915 vc1dsp_select="h264chroma qpeldsp startcode"
1916
1917 # decoders / encoders
1918 aac_decoder_select="imdct15 mdct sinewin"
1919 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1920 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1921 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1922 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1923 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1924 adpcm_g722_decoder_select="g722dsp"
1925 adpcm_g722_encoder_select="g722dsp"
1926 aic_decoder_select="golomb idctdsp"
1927 alac_encoder_select="lpc"
1928 als_decoder_select="bswapdsp"
1929 amrnb_decoder_select="lsp"
1930 amrwb_decoder_select="lsp"
1931 amv_decoder_select="sp5x_decoder"
1932 ape_decoder_select="bswapdsp"
1933 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1934 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1935 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1936 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1937 atrac1_decoder_select="mdct sinewin"
1938 atrac3_decoder_select="mdct"
1939 atrac3p_decoder_select="mdct sinewin"
1940 bink_decoder_select="blockdsp hpeldsp"
1941 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1942 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1943 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1944 cllc_decoder_select="bswapdsp"
1945 comfortnoise_encoder_select="lpc"
1946 cook_decoder_select="audiodsp mdct sinewin"
1947 cscd_decoder_select="lzo"
1948 cscd_decoder_suggest="zlib"
1949 dca_decoder_select="fmtconvert mdct"
1950 dds_decoder_select="texturedsp"
1951 dnxhd_decoder_select="blockdsp idctdsp"
1952 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1953 dvvideo_decoder_select="dvprofile idctdsp"
1954 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1955 dxa_decoder_deps="zlib"
1956 dxv_decoder_select="lzf texturedsp"
1957 eac3_decoder_select="ac3_decoder"
1958 eac3_encoder_select="ac3_encoder"
1959 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1960 eatgq_decoder_select="aandcttables idctdsp"
1961 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1962 exr_decoder_deps="zlib"
1963 ffv1_decoder_select="golomb rangecoder"
1964 ffv1_encoder_select="rangecoder"
1965 ffvhuff_decoder_select="huffyuv_decoder"
1966 ffvhuff_encoder_select="huffyuv_encoder"
1967 fic_decoder_select="golomb"
1968 flac_decoder_select="flacdsp golomb"
1969 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1970 flashsv_decoder_deps="zlib"
1971 flashsv_encoder_deps="zlib"
1972 flashsv2_decoder_deps="zlib"
1973 flv_decoder_select="h263_decoder"
1974 flv_encoder_select="h263_encoder"
1975 fourxm_decoder_select="blockdsp bswapdsp"
1976 fraps_decoder_select="bswapdsp huffman"
1977 g2m_decoder_deps="zlib"
1978 g2m_decoder_select="blockdsp idctdsp jpegtables"
1979 h261_decoder_select="mpeg_er mpegvideo"
1980 h261_encoder_select="aandcttables mpegvideoenc"
1981 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1982 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1983 h263i_decoder_select="h263_decoder"
1984 h263p_encoder_select="h263_encoder"
1985 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
1986 h264_decoder_suggest="error_resilience"
1987 hap_decoder_select="snappy texturedsp"
1988 hap_encoder_deps="libsnappy"
1989 hap_encoder_select="texturedspenc"
1990 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1991 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1992 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1993 iac_decoder_select="imc_decoder"
1994 imc_decoder_select="bswapdsp fft mdct sinewin"
1995 indeo3_decoder_select="hpeldsp"
1996 indeo4_decoder_select="ividsp"
1997 indeo5_decoder_select="ividsp"
1998 interplay_video_decoder_select="hpeldsp"
1999 jpegls_decoder_select="golomb mjpeg_decoder"
2000 jpegls_encoder_select="golomb"
2001 jv_decoder_select="blockdsp"
2002 lagarith_decoder_select="huffyuvdsp"
2003 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2004 loco_decoder_select="golomb"
2005 magicyuv_decoder_select="huffyuvdsp"
2006 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2007 metasound_decoder_select="lsp mdct sinewin"
2008 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2009 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2010 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2011 mjpegb_decoder_select="mjpeg_decoder"
2012 mlp_decoder_select="mlp_parser"
2013 motionpixels_decoder_select="bswapdsp"
2014 mp1_decoder_select="mpegaudio"
2015 mp1float_decoder_select="mpegaudio"
2016 mp2_decoder_select="mpegaudio"
2017 mp2float_decoder_select="mpegaudio"
2018 mp3_decoder_select="mpegaudio"
2019 mp3adu_decoder_select="mpegaudio"
2020 mp3adufloat_decoder_select="mpegaudio"
2021 mp3float_decoder_select="mpegaudio"
2022 mp3on4_decoder_select="mpegaudio"
2023 mp3on4float_decoder_select="mpegaudio"
2024 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2025 mpc8_decoder_select="mpegaudiodsp"
2026 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2027 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2028 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2029 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2030 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2031 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2032 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2033 mpeg4_encoder_select="h263_encoder"
2034 msa1_decoder_select="mss34dsp"
2035 msmpeg4v1_decoder_select="h263_decoder"
2036 msmpeg4v2_decoder_select="h263_decoder"
2037 msmpeg4v2_encoder_select="h263_encoder"
2038 msmpeg4v3_decoder_select="h263_decoder"
2039 msmpeg4v3_encoder_select="h263_encoder"
2040 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2041 mts2_decoder_select="mss34dsp"
2042 mxpeg_decoder_select="mjpeg_decoder"
2043 nellymoser_decoder_select="mdct sinewin"
2044 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2045 nuv_decoder_select="idctdsp lzo"
2046 on2avc_decoder_select="mdct"
2047 opus_decoder_deps="avresample"
2048 opus_decoder_select="imdct15"
2049 png_decoder_deps="zlib"
2050 png_encoder_deps="zlib"
2051 png_encoder_select="huffyuvencdsp"
2052 prores_decoder_select="idctdsp"
2053 prores_encoder_select="fdctdsp"
2054 qcelp_decoder_select="lsp"
2055 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2056 ra_144_encoder_select="audio_frame_queue lpc"
2057 ralf_decoder_select="golomb"
2058 rscc_decoder_deps="zlib"
2059 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2060 rv10_encoder_select="h263_encoder"
2061 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2062 rv20_encoder_select="h263_encoder"
2063 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2064 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2065 screenpresso_decoder_deps="zlib"
2066 shorten_decoder_select="golomb"
2067 sipr_decoder_select="lsp"
2068 sp5x_decoder_select="mjpeg_decoder"
2069 svq1_decoder_select="hpeldsp"
2070 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2071 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2072 svq3_decoder_suggest="zlib"
2073 tak_decoder_select="audiodsp"
2074 tdsc_decoder_deps="zlib"
2075 tdsc_decoder_select="mjpeg_decoder"
2076 theora_decoder_select="vp3_decoder"
2077 thp_decoder_select="mjpeg_decoder"
2078 tiff_decoder_suggest="zlib"
2079 tiff_encoder_suggest="zlib"
2080 truehd_decoder_select="mlp_decoder"
2081 truemotion2_decoder_select="bswapdsp"
2082 truespeech_decoder_select="bswapdsp"
2083 tscc_decoder_deps="zlib"
2084 txd_decoder_select="texturedsp"
2085 twinvq_decoder_select="mdct lsp sinewin"
2086 utvideo_decoder_select="bswapdsp"
2087 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2088 vble_decoder_select="huffyuvdsp"
2089 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2090 vc1image_decoder_select="vc1_decoder"
2091 vorbis_decoder_select="mdct"
2092 vorbis_encoder_select="mdct"
2093 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2094 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2095 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2096 vp6a_decoder_select="vp6_decoder"
2097 vp6f_decoder_select="vp6_decoder"
2098 vp7_decoder_select="h264pred videodsp vp8dsp"
2099 vp8_decoder_select="h264pred videodsp vp8dsp"
2100 vp9_decoder_select="videodsp"
2101 webp_decoder_select="vp8_decoder"
2102 wmapro_decoder_select="mdct sinewin wma_freqs"
2103 wmav1_decoder_select="mdct sinewin wma_freqs"
2104 wmav1_encoder_select="mdct sinewin wma_freqs"
2105 wmav2_decoder_select="mdct sinewin wma_freqs"
2106 wmav2_encoder_select="mdct sinewin wma_freqs"
2107 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2108 wmv1_decoder_select="h263_decoder"
2109 wmv1_encoder_select="h263_encoder"
2110 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2111 wmv2_encoder_select="h263_encoder wmv2dsp"
2112 wmv3_decoder_select="vc1_decoder"
2113 wmv3image_decoder_select="wmv3_decoder"
2114 zerocodec_decoder_deps="zlib"
2115 zlib_decoder_deps="zlib"
2116 zlib_encoder_deps="zlib"
2117 zmbv_decoder_deps="zlib"
2118 zmbv_encoder_deps="zlib"
2119
2120 # hardware accelerators
2121 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2122 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2123 vaapi_deps="va_va_h"
2124 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2125 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2126 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2127
2128 h263_vaapi_hwaccel_deps="vaapi"
2129 h263_vaapi_hwaccel_select="h263_decoder"
2130 h264_d3d11va_hwaccel_deps="d3d11va"
2131 h264_d3d11va_hwaccel_select="h264_decoder"
2132 h264_dxva2_hwaccel_deps="dxva2"
2133 h264_dxva2_hwaccel_select="h264_decoder"
2134 h264_mmal_hwaccel_deps="mmal"
2135 h264_qsv_hwaccel_deps="libmfx"
2136 h264_vaapi_hwaccel_deps="vaapi"
2137 h264_vaapi_hwaccel_select="h264_decoder"
2138 h264_vda_hwaccel_deps="vda"
2139 h264_vda_hwaccel_select="h264_decoder"
2140 h264_vda_old_hwaccel_deps="vda"
2141 h264_vda_old_hwaccel_select="h264_decoder"
2142 h264_vdpau_hwaccel_deps="vdpau"
2143 h264_vdpau_hwaccel_select="h264_decoder"
2144 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2145 hevc_d3d11va_hwaccel_select="hevc_decoder"
2146 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2147 hevc_dxva2_hwaccel_select="hevc_decoder"
2148 hevc_qsv_hwaccel_deps="libmfx"
2149 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2150 hevc_vdpau_hwaccel_select="hevc_decoder"
2151 mpeg1_vdpau_hwaccel_deps="vdpau"
2152 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2153 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2154 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2155 mpeg2_dxva2_hwaccel_deps="dxva2"
2156 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2157 mpeg2_mmal_hwaccel_deps="mmal"
2158 mpeg2_qsv_hwaccel_deps="libmfx"
2159 mpeg2_vaapi_hwaccel_deps="vaapi"
2160 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2161 mpeg2_vdpau_hwaccel_deps="vdpau"
2162 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2163 mpeg4_vaapi_hwaccel_deps="vaapi"
2164 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2165 mpeg4_vdpau_hwaccel_deps="vdpau"
2166 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2167 vc1_d3d11va_hwaccel_deps="d3d11va"
2168 vc1_d3d11va_hwaccel_select="vc1_decoder"
2169 vc1_dxva2_hwaccel_deps="dxva2"
2170 vc1_dxva2_hwaccel_select="vc1_decoder"
2171 vc1_mmal_hwaccel_deps="mmal"
2172 vc1_qsv_hwaccel_deps="libmfx"
2173 vc1_vaapi_hwaccel_deps="vaapi"
2174 vc1_vaapi_hwaccel_select="vc1_decoder"
2175 vc1_vdpau_hwaccel_deps="vdpau"
2176 vc1_vdpau_hwaccel_select="vc1_decoder"
2177 vp8_qsv_hwaccel_deps="libmfx"
2178 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2179 vp8_vaapi_hwaccel_select="vp8_decoder"
2180 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2181 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2182 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2183 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2184
2185 # hardware-accelerated codecs
2186 nvenc_deps_any="dlopen LoadLibrary"
2187 nvenc_extralibs='$ldl'
2188 omx_deps="dlopen pthreads"
2189 omx_extralibs='$ldl'
2190 qsvdec_select="qsv"
2191 qsvenc_select="qsv"
2192 vaapi_encode_deps="vaapi"
2193
2194 hwupload_cuda_filter_deps="cuda"
2195 scale_npp_filter_deps="cuda libnpp"
2196
2197 h264_mmal_decoder_deps="mmal"
2198 h264_nvenc_encoder_deps="nvenc"
2199 h264_omx_encoder_deps="omx"
2200 h264_qsv_decoder_deps="libmfx"
2201 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2202 h264_qsv_encoder_deps="libmfx"
2203 h264_qsv_encoder_select="qsvenc"
2204 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2205 h264_vaapi_encoder_select="vaapi_encode golomb"
2206 hevc_nvenc_encoder_deps="nvenc"
2207 hevc_qsv_decoder_deps="libmfx"
2208 hevc_qsv_encoder_deps="libmfx"
2209 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2210 hevc_qsv_encoder_select="qsvenc"
2211 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2212 hevc_vaapi_encoder_select="vaapi_encode golomb"
2213 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2214 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2215 mpeg2_mmal_decoder_deps="mmal"
2216 mpeg2_qsv_decoder_deps="libmfx"
2217 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2218 mpeg2_qsv_encoder_deps="libmfx"
2219 mpeg2_qsv_encoder_select="qsvenc"
2220 mpeg4_omx_encoder_deps="omx"
2221 vc1_mmal_decoder_deps="mmal"
2222 vc1_qsv_decoder_deps="libmfx"
2223 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2224 vp8_qsv_decoder_deps="libmfx"
2225 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2226
2227 nvenc_h264_encoder_deps="nvenc"
2228 nvenc_hevc_encoder_deps="nvenc"
2229
2230 # parsers
2231 h264_parser_select="golomb h264dsp h264parse"
2232 hevc_parser_select="golomb"
2233 mpegaudio_parser_select="mpegaudioheader"
2234 mpegvideo_parser_select="mpegvideo"
2235 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2236 vc1_parser_select="vc1dsp"
2237
2238 # bitstream_filters
2239 mjpeg2jpeg_bsf_select="jpegtables"
2240
2241 # external libraries
2242 libdcadec_decoder_deps="libdcadec"
2243 libfaac_encoder_deps="libfaac"
2244 libfaac_encoder_select="audio_frame_queue"
2245 libfdk_aac_decoder_deps="libfdk_aac"
2246 libfdk_aac_encoder_deps="libfdk_aac"
2247 libfdk_aac_encoder_select="audio_frame_queue"
2248 libgsm_decoder_deps="libgsm"
2249 libgsm_encoder_deps="libgsm"
2250 libgsm_ms_decoder_deps="libgsm"
2251 libgsm_ms_encoder_deps="libgsm"
2252 libilbc_decoder_deps="libilbc"
2253 libilbc_encoder_deps="libilbc"
2254 libkvazaar_encoder_deps="libkvazaar"
2255 libmp3lame_encoder_deps="libmp3lame"
2256 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2257 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2258 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2259 libopencore_amrnb_encoder_select="audio_frame_queue"
2260 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2261 libopenh264_decoder_deps="libopenh264"
2262 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2263 libopenh264_encoder_deps="libopenh264"
2264 libopenjpeg_decoder_deps="libopenjpeg"
2265 libopenjpeg_encoder_deps="libopenjpeg"
2266 libopus_decoder_deps="libopus"
2267 libopus_encoder_deps="libopus"
2268 libopus_encoder_select="audio_frame_queue"
2269 libschroedinger_decoder_deps="libschroedinger"
2270 libschroedinger_encoder_deps="libschroedinger"
2271 libspeex_decoder_deps="libspeex"
2272 libspeex_encoder_deps="libspeex"
2273 libspeex_encoder_select="audio_frame_queue"
2274 libtheora_encoder_deps="libtheora"
2275 libtwolame_encoder_deps="libtwolame"
2276 libvo_aacenc_encoder_deps="libvo_aacenc"
2277 libvo_aacenc_encoder_select="audio_frame_queue"
2278 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2279 libvorbis_encoder_deps="libvorbis"
2280 libvorbis_encoder_select="audio_frame_queue"
2281 libvpx_vp8_decoder_deps="libvpx"
2282 libvpx_vp8_encoder_deps="libvpx"
2283 libvpx_vp9_decoder_deps="libvpx"
2284 libvpx_vp9_encoder_deps="libvpx"
2285 libwavpack_encoder_deps="libwavpack"
2286 libwavpack_encoder_select="audio_frame_queue"
2287 libwebp_encoder_deps="libwebp"
2288 libx262_encoder_deps="libx262"
2289 libx264_encoder_deps="libx264"
2290 libx265_encoder_deps="libx265"
2291 libxavs_encoder_deps="libxavs"
2292 libxvid_encoder_deps="libxvid mkstemp"
2293
2294 # demuxers / muxers
2295 ac3_demuxer_select="ac3_parser"
2296 asf_demuxer_select="riffdec"
2297 asf_muxer_select="riffenc"
2298 asf_stream_muxer_select="asf_muxer"
2299 avi_demuxer_select="iso_media riffdec"
2300 avi_muxer_select="riffenc"
2301 avisynth_demuxer_deps="avisynth"
2302 avisynth_demuxer_select="riffdec"
2303 caf_demuxer_select="iso_media riffdec"
2304 dash_muxer_select="mp4_muxer"
2305 dirac_demuxer_select="dirac_parser"
2306 dv_demuxer_select="dvprofile"
2307 dv_muxer_select="dvprofile"
2308 dxa_demuxer_select="riffdec"
2309 eac3_demuxer_select="ac3_parser"
2310 f4v_muxer_select="mov_muxer"
2311 flac_demuxer_select="flac_parser"
2312 hds_muxer_select="flv_muxer"
2313 hls_muxer_select="mpegts_muxer"
2314 ipod_muxer_select="mov_muxer"
2315 ismv_muxer_select="mov_muxer"
2316 matroska_audio_muxer_select="matroska_muxer"
2317 matroska_demuxer_select="iso_media riffdec"
2318 matroska_demuxer_suggest="bzlib lzo zlib"
2319 matroska_muxer_select="iso_media riffenc"
2320 mmf_muxer_select="riffenc"
2321 mov_demuxer_select="iso_media riffdec"
2322 mov_demuxer_suggest="zlib"
2323 mov_muxer_select="iso_media riffenc rtpenc_chain"
2324 mp3_demuxer_select="mpegaudio_parser"
2325 mp3_muxer_select="mpegaudioheader"
2326 mp4_muxer_select="mov_muxer"
2327 mpegts_demuxer_select="iso_media"
2328 mpegts_muxer_select="adts_muxer latm_muxer"
2329 mpegtsraw_demuxer_select="mpegts_demuxer"
2330 mxf_d10_muxer_select="mxf_muxer"
2331 nut_muxer_select="riffenc"
2332 nuv_demuxer_select="riffdec"
2333 oga_muxer_select="ogg_muxer"
2334 ogg_demuxer_select="dirac_parse"
2335 opus_muxer_select="ogg_muxer"
2336 psp_muxer_select="mov_muxer"
2337 rtp_demuxer_select="sdp_demuxer"
2338 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2339 rtsp_demuxer_select="http_protocol rtpdec"
2340 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2341 sap_demuxer_select="sdp_demuxer"
2342 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2343 sdp_demuxer_select="rtpdec"
2344 smoothstreaming_muxer_select="ismv_muxer"
2345 spdif_muxer_select="aac_parser"
2346 spx_muxer_select="ogg_muxer"
2347 swf_demuxer_suggest="zlib"
2348 tak_demuxer_select="tak_parser"
2349 tg2_muxer_select="mov_muxer"
2350 tgp_muxer_select="mov_muxer"
2351 w64_demuxer_select="wav_demuxer"
2352 wav_demuxer_select="riffdec"
2353 wav_muxer_select="riffenc"
2354 webm_muxer_select="iso_media riffenc"
2355 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2356 wtv_demuxer_select="mpegts_demuxer riffdec"
2357 xmv_demuxer_select="riffdec"
2358 xwma_demuxer_select="riffdec"
2359
2360 # indevs / outdevs
2361 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2362 alsa_outdev_deps="alsa_asoundlib_h"
2363 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2364 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2365 dv1394_indev_deps="dv1394"
2366 dv1394_indev_select="dv_demuxer"
2367 fbdev_indev_deps="linux_fb_h"
2368 jack_indev_deps="jack_jack_h"
2369 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2370 libcdio_indev_deps="libcdio"
2371 libdc1394_indev_deps="libdc1394"
2372 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2373 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2374 pulse_indev_deps="libpulse"
2375 sndio_indev_deps="sndio_h"
2376 sndio_outdev_deps="sndio_h"
2377 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2378 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2379 vfwcap_indev_extralibs="-lavicap32"
2380 xcbgrab_indev_deps="libxcb"
2381
2382 # protocols
2383 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2384 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2385 ffrtmpcrypt_protocol_select="tcp_protocol"
2386 ffrtmphttp_protocol_deps="!librtmp_protocol"
2387 ffrtmphttp_protocol_select="http_protocol"
2388 gopher_protocol_select="network"
2389 http_protocol_select="tcp_protocol"
2390 httpproxy_protocol_select="tcp_protocol"
2391 https_protocol_select="tls_protocol"
2392 icecast_protocol_select="http_protocol"
2393 librtmp_protocol_deps="librtmp"
2394 librtmpe_protocol_deps="librtmp"
2395 librtmps_protocol_deps="librtmp"
2396 librtmpt_protocol_deps="librtmp"
2397 librtmpte_protocol_deps="librtmp"
2398 mmsh_protocol_select="http_protocol"
2399 mmst_protocol_select="network"
2400 rtmp_protocol_deps="!librtmp_protocol"
2401 rtmp_protocol_select="tcp_protocol"
2402 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2403 rtmps_protocol_deps="!librtmp_protocol"
2404 rtmps_protocol_select="tls_protocol"
2405 rtmpt_protocol_select="ffrtmphttp_protocol"
2406 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2407 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2408 rtp_protocol_select="udp_protocol"
2409 sctp_protocol_deps="struct_sctp_event_subscribe"
2410 sctp_protocol_select="network"
2411 srtp_protocol_select="rtp_protocol srtp"
2412 tcp_protocol_select="network"
2413 tls_gnutls_protocol_deps="gnutls"
2414 tls_gnutls_protocol_select="tcp_protocol"
2415 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2416 tls_openssl_protocol_select="tcp_protocol"
2417 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2418 udp_protocol_select="network"
2419 unix_protocol_deps="sys_un_h"
2420 unix_protocol_select="network"
2421
2422 # filters
2423 asyncts_filter_deps="avresample"
2424 blackframe_filter_deps="gpl"
2425 boxblur_filter_deps="gpl"
2426 bs2b_filter_deps="libbs2b"
2427 cropdetect_filter_deps="gpl"
2428 deinterlace_qsv_filter_deps="libmfx"
2429 delogo_filter_deps="gpl"
2430 drawtext_filter_deps="libfreetype"
2431 frei0r_filter_deps="frei0r dlopen"
2432 frei0r_filter_extralibs='$ldl'
2433 frei0r_src_filter_deps="frei0r dlopen"
2434 frei0r_src_filter_extralibs='$ldl'
2435 hdcd_filter_deps="libhdcd"
2436 hqdn3d_filter_deps="gpl"
2437 interlace_filter_deps="gpl"
2438 movie_filter_deps="avcodec avformat"
2439 ocv_filter_deps="libopencv"
2440 resample_filter_deps="avresample"
2441 scale_filter_deps="swscale"
2442 scale_qsv_filter_deps="libmfx"
2443 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2444
2445 # examples
2446 decode_audio_example_deps="avcodec avutil"
2447 decode_video_example_deps="avcodec avutil"
2448 encode_audio_example_deps="avcodec avutil"
2449 encode_video_example_deps="avcodec avutil"
2450 filter_audio_example_deps="avfilter avutil"
2451 metadata_example_deps="avformat avutil"
2452 output_example_deps="avcodec avformat avresample avutil swscale"
2453 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2454 transcode_aac_example_deps="avcodec avformat avresample"
2455
2456 # libraries, in linking order
2457 avcodec_deps="avutil"
2458 avdevice_deps="avformat avcodec avutil"
2459 avfilter_deps="avutil"
2460 avformat_deps="avcodec avutil"
2461 avresample_deps="avutil"
2462 swscale_deps="avutil"
2463
2464 # programs
2465 avconv_deps="avcodec avfilter avformat avresample swscale"
2466 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2467                fps_filter null_filter resample_filter scale_filter
2468                trim_filter"
2469 avplay_deps="avcodec avfilter avformat avresample sdl"
2470 avplay_libs='$sdl_libs'
2471 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2472 avprobe_deps="avcodec avformat"
2473
2474 # documentation
2475 pod2man_deps="doc"
2476 texi2html_deps="doc"
2477
2478 # default parameters
2479
2480 logfile="config.log"
2481
2482 # installation paths
2483 prefix_default="/usr/local"
2484 bindir_default='${prefix}/bin'
2485 datadir_default='${prefix}/share/avconv'
2486 docdir_default='${prefix}/share/doc/libav'
2487 incdir_default='${prefix}/include'
2488 libdir_default='${prefix}/lib'
2489 mandir_default='${prefix}/share/man'
2490 shlibdir_default="$libdir_default"
2491
2492 # toolchain
2493 ar_default="ar"
2494 cc_default="gcc"
2495 host_cc_default="gcc"
2496 ln_s="ln -s -f"
2497 nm_default="nm -g"
2498 objformat="elf"
2499 pkg_config_default=pkg-config
2500 ranlib="ranlib"
2501 strip="strip"
2502 version_script='--version-script'
2503 yasmexe="yasm"
2504
2505 # machine
2506 arch_default=$(uname -m)
2507 cpu="generic"
2508 intrinsics="none"
2509
2510 # OS
2511 target_os_default=$(tolower $(uname -s))
2512 host_os=$target_os_default
2513
2514 # configurable options
2515 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2516
2517 enable asm
2518 enable debug
2519 enable doc
2520 enable faan faandct faanidct
2521 enable optimizations
2522 enable safe_bitstream_reader
2523 enable static
2524 enable swscale_alpha
2525 enable valgrind_backtrace
2526
2527 # By default, enable only those hwaccels that have no external dependencies.
2528 enable d3d11va dxva2 vda vdpau
2529
2530 # build settings
2531 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2532 LIBPREF="lib"
2533 LIBSUF=".a"
2534 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2535 SLIBPREF="lib"
2536 SLIBSUF=".so"
2537 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2538 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2539 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2540 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2541 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2542 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2543 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2544
2545 asflags_filter=echo
2546 cflags_filter=echo
2547 ldflags_filter=echo
2548
2549 AS_C='-c'
2550 AS_O='-o $@'
2551 CC_C='-c'
2552 CC_E='-E -o $@'
2553 CC_O='-o $@'
2554 OBJCC_C='-c'
2555 OBJCC_E='-E -o $@'
2556 OBJCC_O='-o $@'
2557 LD_O='-o $@'
2558 LD_LIB='-l%'
2559 LD_PATH='-L'
2560 HOSTCC_C='-c'
2561 HOSTCC_E='-E -o $@'
2562 HOSTCC_O='-o $@'
2563 HOSTLD_O='-o $@'
2564
2565 host_libs='-lm'
2566 host_cflags_filter=echo
2567 host_ldflags_filter=echo
2568
2569 target_path='$(CURDIR)'
2570
2571 # since the object filename is not given with the -MM flag, the compiler
2572 # is only able to print the basename, and we must add the path ourselves
2573 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2574 DEPFLAGS='-MM'
2575
2576 # find source path
2577 if test -f configure; then
2578     source_path=.
2579 else
2580     source_path=$(cd $(dirname "$0"); pwd)
2581     echo "$source_path" | grep -q '[[:blank:]]' &&
2582         die "Out of tree builds are impossible with whitespace in source path."
2583     test -e "$source_path/config.h" &&
2584         die "Out of tree builds are impossible with config.h in source dir."
2585 fi
2586
2587 for v in "$@"; do
2588     r=${v#*=}
2589     l=${v%"$r"}
2590     r=$(sh_quote "$r")
2591     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2592 done
2593
2594 find_things(){
2595     thing=$1
2596     pattern=$2
2597     file=$source_path/$3
2598     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2599 }
2600
2601 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2602 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2603 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2604 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2605 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2606 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2607 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2608 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2609 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2610
2611 find_things_extern(){
2612     thing=$1
2613     pattern=$2
2614     file=$source_path/$3
2615     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2616 }
2617
2618 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2619 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2620
2621 ALL_COMPONENTS="
2622     $BSF_LIST
2623     $DECODER_LIST
2624     $DEMUXER_LIST
2625     $ENCODER_LIST
2626     $FILTER_LIST
2627     $HWACCEL_LIST
2628     $INDEV_LIST
2629     $MUXER_LIST
2630     $OUTDEV_LIST
2631     $PARSER_LIST
2632     $PROTOCOL_LIST
2633 "
2634
2635 for n in $COMPONENT_LIST; do
2636     v=$(toupper ${n%s})_LIST
2637     eval enable \$$v
2638     eval ${n}_if_any="\$$v"
2639 done
2640
2641 enable $ARCH_EXT_LIST
2642
2643 die_unknown(){
2644     echo "Unknown option \"$1\"."
2645     echo "See $0 --help for available options."
2646     exit 1
2647 }
2648
2649 print_3_columns() {
2650     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2651 }
2652
2653 show_list() {
2654     suffix=_$1
2655     shift
2656     echo $* | sed s/$suffix//g | print_3_columns
2657     exit 0
2658 }
2659
2660 rand_list(){
2661     IFS=', '
2662     set -- $*
2663     unset IFS
2664     for thing; do
2665         comp=${thing%:*}
2666         prob=${thing#$comp}
2667         prob=${prob#:}
2668         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2669         echo "prob ${prob:-0.5}"
2670         printf '%s\n' $comp
2671     done
2672 }
2673
2674 do_random(){
2675     action=$1
2676     shift
2677     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2678     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2679 }
2680
2681 for opt do
2682     optval="${opt#*=}"
2683     case "$opt" in
2684         --extra-ldflags=*)
2685             add_ldflags $optval
2686         ;;
2687         --extra-ldexeflags=*)
2688             add_ldexeflags $optval
2689         ;;
2690         --extra-libs=*)
2691             add_extralibs $optval
2692         ;;
2693         --disable-devices)
2694             disable $INDEV_LIST $OUTDEV_LIST
2695         ;;
2696         --enable-debug=*)
2697             debuglevel="$optval"
2698         ;;
2699         --disable-programs)
2700             disable $PROGRAM_LIST
2701         ;;
2702         --disable-everything)
2703             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2704         ;;
2705         --disable-all)
2706             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2707             disable $LIBRARY_LIST $PROGRAM_LIST doc
2708         ;;
2709         --enable-random|--disable-random)
2710             action=${opt%%-random}
2711             do_random ${action#--} $COMPONENT_LIST
2712         ;;
2713         --enable-random=*|--disable-random=*)
2714             action=${opt%%-random=*}
2715             do_random ${action#--} $optval
2716         ;;
2717         --enable-*=*|--disable-*=*)
2718             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2719             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2720             eval list=\$$(toupper $thing)_LIST
2721             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2722             $action $(filter "$name" $list)
2723         ;;
2724         --enable-avserver|--disable-avserver*)
2725             warn "avserver has been removed, the ${opt} option is only"\
2726                  "provided for compatibility and will be removed in the future"
2727         ;;
2728         --enable-?*|--disable-?*)
2729             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2730             if is_in $option $COMPONENT_LIST; then
2731                 test $action = disable && action=unset
2732                 eval $action \$$(toupper ${option%s})_LIST
2733             elif is_in $option $CMDLINE_SELECT; then
2734                 $action $option
2735             else
2736                 die_unknown $opt
2737             fi
2738         ;;
2739         --list-*)
2740             NAME="${opt#--list-}"
2741             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2742             NAME=${NAME%s}
2743             eval show_list $NAME \$$(toupper $NAME)_LIST
2744         ;;
2745         --help|-h) show_help
2746         ;;
2747         --quiet|-q) quiet=yes
2748         ;;
2749         *)
2750             optname="${opt%%=*}"
2751             optname="${optname#--}"
2752             optname=$(echo "$optname" | sed 's/-/_/g')
2753             if is_in $optname $CMDLINE_SET; then
2754                 eval $optname='$optval'
2755             elif is_in $optname $CMDLINE_APPEND; then
2756                 append $optname "$optval"
2757             else
2758                 die_unknown $opt
2759             fi
2760         ;;
2761     esac
2762 done
2763
2764 for e in $env; do
2765     eval "export $e"
2766 done
2767
2768 disabled logging && logfile=/dev/null
2769
2770 # Die early if licensing-related configure options are incompatible.
2771 die_license_disabled() {
2772     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2773 }
2774
2775 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2776 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2777 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2778
2779 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2780
2781 # Disable all the library-specific components if the library itself
2782 # is disabled, see AVCODEC_LIST and following _LIST variables.
2783
2784 disable_components(){
2785     disabled ${1} && disable $(
2786         eval components="\$$(toupper ${1})_COMPONENTS"
2787         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2788     )
2789 }
2790
2791 map 'disable_components $v' $LIBRARY_LIST
2792
2793 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2794 set >> $logfile
2795
2796 case "$toolchain" in
2797     *-asan)
2798         cc_default="${toolchain%-asan}"
2799         add_cflags  -fsanitize=address
2800         add_ldflags -fsanitize=address
2801     ;;
2802     *-msan)
2803         cc_default="${toolchain%-msan}"
2804         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2805         add_ldflags -fsanitize=memory
2806     ;;
2807     *-tsan)
2808         cc_default="${toolchain%-tsan}"
2809         add_cflags  -fsanitize=thread -pie
2810         add_ldflags -fsanitize=thread -pie
2811         case "$toolchain" in
2812             gcc-tsan)
2813                 add_cflags  -fPIC
2814                 add_ldflags -fPIC
2815                 ;;
2816         esac
2817     ;;
2818     *-usan)
2819         cc_default="${toolchain%-usan}"
2820         add_cflags  -fsanitize=undefined
2821         add_ldflags -fsanitize=undefined
2822         case "$toolchain" in
2823             clang-usan)
2824                 add_cflags -O1
2825                 ;;
2826         esac
2827     ;;
2828     valgrind-*)
2829         target_exec_default="valgrind"
2830         case "$toolchain" in
2831             valgrind-massif)
2832                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2833                 ;;
2834             valgrind-memcheck)
2835                 target_exec_args="--track-origins=yes --leak-check=full"
2836                 ;;
2837         esac
2838     ;;
2839     msvc)
2840         # Check whether the current MSVC version needs the C99 converter.
2841         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2842         # support enough of C99 to build libav. Default to the new
2843         # behaviour if the regexp was unable to match anything, since this
2844         # successfully parses the version number of existing supported
2845         # versions that require the converter (MSVC 2010 and 2012).
2846         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2847         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2848             cc_default="cl"
2849         else
2850             cc_default="c99wrap cl"
2851         fi
2852         ld_default="$source_path/compat/windows/mslink"
2853         nm_default="dumpbin -symbols"
2854         ar_default="lib"
2855         case "$arch" in
2856         arm*)
2857             as_default="armasm"
2858             ;;
2859         esac
2860         target_os_default="win32"
2861         # Use a relative path for TMPDIR. This makes sure all the
2862         # ffconf temp files are written with a relative path, avoiding
2863         # issues with msys/win32 path conversion for MSVC parameters
2864         # such as -Fo<file> or -out:<file>.
2865         TMPDIR=.
2866     ;;
2867     icl)
2868         cc_default="icl"
2869         ld_default="xilink"
2870         nm_default="dumpbin -symbols"
2871         ar_default="xilib"
2872         target_os_default="win32"
2873         TMPDIR=.
2874     ;;
2875     gcov)
2876         add_cflags  -fprofile-arcs -ftest-coverage
2877         add_ldflags -fprofile-arcs -ftest-coverage
2878     ;;
2879     llvm-cov)
2880         add_cflags -fprofile-arcs -ftest-coverage
2881         add_ldflags --coverage
2882     ;;
2883     hardened)
2884         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2885         add_cflags   -fno-strict-overflow -fstack-protector-all
2886         add_ldflags  -Wl,-z,relro -Wl,-z,now
2887     ;;
2888     ?*)
2889         die "Unknown toolchain $toolchain"
2890     ;;
2891 esac
2892
2893 test -n "$cross_prefix" && enable cross_compile
2894
2895 if enabled cross_compile; then
2896     test -n "$arch" && test -n "$target_os" ||
2897         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2898 fi
2899
2900 ar_default="${cross_prefix}${ar_default}"
2901 cc_default="${cross_prefix}${cc_default}"
2902 occ_default="${cross_prefix}${occ_default}"
2903 nm_default="${cross_prefix}${nm_default}"
2904 pkg_config_default="${cross_prefix}${pkg_config_default}"
2905 ranlib="${cross_prefix}${ranlib}"
2906 strip="${cross_prefix}${strip}"
2907
2908 sysinclude_default="${sysroot}/usr/include"
2909
2910 set_default arch cc pkg_config sysinclude target_exec target_os
2911 enabled cross_compile || host_cc_default=$cc
2912 set_default host_cc
2913
2914 if ! $pkg_config --version >/dev/null 2>&1; then
2915     warn "$pkg_config not found, library detection may fail."
2916     pkg_config=false
2917 fi
2918
2919 exesuf() {
2920     case $1 in
2921         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2922     esac
2923 }
2924
2925 EXESUF=$(exesuf $target_os)
2926 HOSTEXESUF=$(exesuf $host_os)
2927
2928 # set temporary file name
2929 : ${TMPDIR:=$TEMPDIR}
2930 : ${TMPDIR:=$TMP}
2931 : ${TMPDIR:=/tmp}
2932
2933 if ! check_cmd mktemp -u XXXXXX; then
2934     # simple replacement for missing mktemp
2935     # NOT SAFE FOR GENERAL USE
2936     mktemp(){
2937         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2938     }
2939 fi
2940
2941 tmpfile(){
2942     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2943         (set -C; exec > $tmp) 2>/dev/null ||
2944         die "Unable to create temporary file in $TMPDIR."
2945     append TMPFILES $tmp
2946     eval $1=$tmp
2947 }
2948
2949 trap 'rm -f -- $TMPFILES' EXIT
2950
2951 tmpfile TMPASM .asm
2952 tmpfile TMPC   .c
2953 tmpfile TMPE   $EXESUF
2954 tmpfile TMPH   .h
2955 tmpfile TMPO   .o
2956 tmpfile TMPS   .S
2957 tmpfile TMPSH  .sh
2958 tmpfile TMPV   .ver
2959
2960 unset -f mktemp
2961
2962 chmod +x $TMPE
2963
2964 # make sure we can execute files in $TMPDIR
2965 cat > $TMPSH 2>> $logfile <<EOF
2966 #! /bin/sh
2967 EOF
2968 chmod +x $TMPSH >> $logfile 2>&1
2969 if ! $TMPSH >> $logfile 2>&1; then
2970     cat <<EOF
2971 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2972 variable to another directory and make sure that it is not mounted noexec.
2973 EOF
2974     die "Sanity test failed."
2975 fi
2976
2977 armasm_flags(){
2978     for flag; do
2979         case $flag in
2980             # Filter out MSVC cl.exe options from cflags that shouldn't
2981             # be passed to gas-preprocessor
2982             -M[TD]*)                                            ;;
2983             *)                  echo $flag                      ;;
2984         esac
2985    done
2986 }
2987
2988 ccc_flags(){
2989     for flag; do
2990         case $flag in
2991             -std=c99)           echo -c99                       ;;
2992             -mcpu=*)            echo -arch ${flag#*=}           ;;
2993             -mieee)             echo -ieee                      ;;
2994             -O*|-fast)          echo $flag                      ;;
2995             -fno-math-errno)    echo -assume nomath_errno       ;;
2996             -g)                 echo -g3                        ;;
2997             -Wall)              echo -msg_enable level2         ;;
2998             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2999             -Wl,*)              echo $flag                      ;;
3000             -f*|-W*)                                            ;;
3001             *)                  echo $flag                      ;;
3002         esac
3003    done
3004 }
3005
3006 cparser_flags(){
3007     for flag; do
3008         case $flag in
3009             -Wno-switch)             echo -Wno-switch-enum ;;
3010             -Wno-format-zero-length) ;;
3011             -Wdisabled-optimization) ;;
3012             -Wno-pointer-sign)       echo -Wno-other ;;
3013             *)                       echo $flag ;;
3014         esac
3015     done
3016 }
3017
3018 msvc_common_flags(){
3019     for flag; do
3020         case $flag in
3021             # In addition to specifying certain flags under the compiler
3022             # specific filters, they must be specified here as well or else the
3023             # generic catch all at the bottom will print the original flag.
3024             -Wall)                ;;
3025             -std=c99)             ;;
3026             # Common flags
3027             -fomit-frame-pointer) ;;
3028             -g)                   echo -Z7 ;;
3029             -fno-math-errno)      ;;
3030             -fno-common)          ;;
3031             -fno-signed-zeros)    ;;
3032             -fPIC)                ;;
3033             -mthumb)              ;;
3034             -march=*)             ;;
3035             -lz)                  echo zlib.lib ;;
3036             -lavicap32)           echo vfw32.lib user32.lib ;;
3037             -lx264)               echo libx264.lib ;;
3038             -l*)                  echo ${flag#-l}.lib ;;
3039             -L*)                  echo -libpath:${flag#-L} ;;
3040             *)                    echo $flag ;;
3041         esac
3042     done
3043 }
3044
3045 msvc_flags(){
3046     msvc_common_flags "$@"
3047     for flag; do
3048         case $flag in
3049             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3050                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3051                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3052                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3053         esac
3054     done
3055 }
3056
3057 icl_flags(){
3058     msvc_common_flags "$@"
3059     for flag; do
3060         case $flag in
3061             # Despite what Intel's documentation says -Wall, which is supported
3062             # on Windows, does enable remarks so disable them here.
3063             -Wall)                echo $flag -Qdiag-disable:remark ;;
3064             -std=c99)             echo -Qstd=c99 ;;
3065         esac
3066     done
3067 }
3068
3069 pgi_flags(){
3070     for flag; do
3071         case $flag in
3072             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3073             -fomit-frame-pointer) echo -Mnoframe ;;
3074             -g)                   echo -gopt ;;
3075             *)                    echo $flag ;;
3076         esac
3077     done
3078 }
3079
3080 suncc_flags(){
3081     for flag; do
3082         case $flag in
3083             -march=*|-mcpu=*)
3084                 case "${flag#*=}" in
3085                     native)                   echo -xtarget=native       ;;
3086                     v9|niagara)               echo -xarch=sparc          ;;
3087                     ultrasparc)               echo -xarch=sparcvis       ;;
3088                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3089                     i586|pentium)             echo -xchip=pentium        ;;
3090                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3091                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3092                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3093                     pentium4*)          echo -xtarget=pentium4           ;;
3094                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3095                     *-sse3)             echo -xarch=sse3                 ;;
3096                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3097                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3098                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3099                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3100                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3101                     k8|opteron|athlon64|athlon-fx)
3102                                                echo -xarch=sse2a         ;;
3103                     athlon*)                   echo -xarch=pentium_proa  ;;
3104                 esac
3105                 ;;
3106             -std=c99)             echo -xc99              ;;
3107             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3108             -fPIC)                echo -KPIC -xcode=pic32 ;;
3109             -W*,*)                echo $flag              ;;
3110             -f*-*|-W*|-mimpure-text)                      ;;
3111             -shared)              echo -G                 ;;
3112             *)                    echo $flag              ;;
3113         esac
3114     done
3115 }
3116
3117 tms470_flags(){
3118     for flag; do
3119         case $flag in
3120             -march=*|-mcpu=*)
3121                 case "${flag#*=}" in
3122                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3123                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3124                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3125                     armv6*|arm11*)          echo -mv=6   ;;
3126                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3127                                             echo -mv=5e  ;;
3128                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3129                 esac
3130                 ;;
3131             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3132             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3133             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3134             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3135             -msoft-float)   echo --float_support=vfplib       ;;
3136             -O[0-3]|-mf=*)  echo $flag                        ;;
3137             -g)             echo -g -mn                       ;;
3138             -pds=*)         echo $flag                        ;;
3139             -D*|-I*)        echo $flag                        ;;
3140             --gcc|--abi=*)  echo $flag                        ;;
3141             -me)            echo $flag                        ;;
3142         esac
3143     done
3144 }
3145
3146 probe_cc(){
3147     pfx=$1
3148     _cc=$2
3149
3150     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3151     unset _ld_o _ldflags _ld_lib _ld_path
3152     unset _depflags _DEPCMD _DEPFLAGS
3153     _flags_filter=echo
3154
3155     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3156         _type=llvm_gcc
3157         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3158         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3159         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3160         _cflags_speed='-O3'
3161         _cflags_size='-Os'
3162     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3163         _type=gcc
3164         gcc_version=$($_cc --version | head -n1)
3165         gcc_basever=$($_cc -dumpversion)
3166         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3167         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3168         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3169         if ! $_cc -dumpversion | grep -q '^2\.'; then
3170             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3171         fi
3172         _cflags_speed='-O3'
3173         _cflags_size='-Os'
3174     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3175         _type=icc
3176         _ident=$($_cc --version | head -n1)
3177         _depflags='-MMD'
3178         _cflags_speed='-O3'
3179         _cflags_size='-Os'
3180         _cflags_noopt='-O1'
3181     elif $_cc -v 2>&1 | grep -q xlc; then
3182         _type=xlc
3183         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3184         _cflags_speed='-O5'
3185         _cflags_size='-O5 -qcompact'
3186     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3187         _type=ccc
3188         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3189         _DEPFLAGS='-M'
3190         _cflags_speed='-fast'
3191         _cflags_size='-O1'
3192         _flags_filter=ccc_flags
3193     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3194         test -d "$sysroot" || die "No valid sysroot specified."
3195         _type=armcc
3196         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3197         armcc_conf="$PWD/armcc.conf"
3198         $_cc --arm_linux_configure                 \
3199              --arm_linux_config_file="$armcc_conf" \
3200              --configure_sysroot="$sysroot"        \
3201              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3202              die "Error creating armcc configuration file."
3203         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3204         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3205         as_default="${cross_prefix}gcc"
3206         _depflags='-MMD'
3207         _cflags_speed='-O3'
3208         _cflags_size='-Os'
3209     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3210         _type=tms470
3211         _ident=$($_cc -version | head -n1 | tr -s ' ')
3212         _flags='--gcc --abi=eabi -me'
3213         _cc_e='-ppl -fe=$@'
3214         _cc_o='-fe=$@'
3215         _depflags='-ppa -ppd=$(@:.o=.d)'
3216         _cflags_speed='-O3 -mf=5'
3217         _cflags_size='-O3 -mf=2'
3218         _flags_filter=tms470_flags
3219     elif $_cc -v 2>&1 | grep -q clang; then
3220         _type=clang
3221         _ident=$($_cc --version 2>/dev/null | head -n1)
3222         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3223         _cflags_speed='-O3'
3224         _cflags_size='-Os'
3225     elif $_cc -V 2>&1 | grep -q Sun; then
3226         _type=suncc
3227         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3228         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3229         _DEPFLAGS='-xM1 -xc99'
3230         _ldflags='-std=c99'
3231         _cflags_speed='-O5'
3232         _cflags_size='-O5 -xspace'
3233         _flags_filter=suncc_flags
3234     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3235         _type=pathscale
3236         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3237         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3238         _cflags_speed='-O2'
3239         _cflags_size='-Os'
3240         _flags_filter='filter_out -Wdisabled-optimization'
3241     elif $_cc -v 2>&1 | grep -q Open64; then
3242         _type=open64
3243         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3244         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3245         _cflags_speed='-O2'
3246         _cflags_size='-Os'
3247         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3248     elif $_cc -V 2>&1 | grep -q Portland; then
3249         _type=pgi
3250         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3251         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3252         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3253         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3254         _cflags_noopt="-O1"
3255         _flags_filter=pgi_flags
3256     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3257         _type=armasm
3258         _ident=$($_cc | head -n1)
3259         # 4509: "This form of conditional instruction is deprecated"
3260         _flags="-nologo -ignore 4509"
3261         _flags_filter=armasm_flags
3262     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3263         _type=msvc
3264         _ident=$($_cc 2>&1 | head -n1)
3265         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3266         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3267         _cflags_speed="-O2"
3268         _cflags_size="-O1"
3269         if $_cc -nologo- 2>&1 | grep -q Linker; then
3270             _ld_o='-out:$@'
3271         else
3272             _ld_o='-Fe$@'
3273         fi
3274         _cc_o='-Fo$@'
3275         _cc_e='-P -Fi$@'
3276         _flags_filter=msvc_flags
3277         _ld_lib='lib%.a'
3278         _ld_path='-libpath:'
3279         _flags='-nologo'
3280     elif $_cc 2>&1 | grep -q Intel; then
3281         _type=icl
3282         _ident=$($_cc 2>&1 | head -n1)
3283         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3284         # Not only is O3 broken on 13.x+ but it is slower on all previous
3285         # versions (tested) as well.
3286         _cflags_speed="-O2"
3287         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3288         if $_cc 2>&1 | grep -q Linker; then
3289             _ld_o='-out:$@'
3290         else
3291             _ld_o='-Fe$@'
3292         fi
3293         _cc_o='-Fo$@'
3294         _cc_e='-P'
3295         _flags_filter=icl_flags
3296         _ld_lib='lib%.a'
3297         _ld_path='-libpath:'
3298         # -Qdiag-error to make icl error when seeing certain unknown arguments
3299         _flags='-nologo -Qdiag-error:4044,10157'
3300         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3301         # with MSVC which enables it by default.
3302         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3303     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3304         # lld can emulate multiple different linkers; in ms link.exe mode,
3305         # the -? parameter gives the help output which contains an identifyable
3306         # string, while it gives an error in other modes.
3307         _type=lld-link
3308         # The link.exe mode doesn't have a switch for getting the version,
3309         # but we can force it back to gnu mode and get the version from there.
3310         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3311         _ld_o='-out:$@'
3312         _flags_filter=msvc_flags
3313         _ld_lib='lib%.a'
3314         _ld_path='-libpath:'
3315     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3316         _type=cparser
3317         _ident=$($_cc --version | head -n1)
3318         _depflags='-MMD'
3319         _cflags_speed='-O4'
3320         _cflags_size='-O2'
3321         _flags_filter=cparser_flags
3322     fi
3323
3324     eval ${pfx}_type=\$_type
3325     eval ${pfx}_ident=\$_ident
3326 }
3327
3328 set_ccvars(){
3329     eval ${1}_C=\${_cc_c-\${${1}_C}}
3330     eval ${1}_E=\${_cc_e-\${${1}_E}}
3331     eval ${1}_O=\${_cc_o-\${${1}_O}}
3332
3333     if [ -n "$_depflags" ]; then
3334         eval ${1}_DEPFLAGS=\$_depflags
3335     else
3336         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3337         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3338         eval DEP${1}FLAGS=\$_flags
3339     fi
3340 }
3341
3342 probe_cc cc "$cc"
3343 cflags_filter=$_flags_filter
3344 cflags_speed=$_cflags_speed
3345 cflags_size=$_cflags_size
3346 cflags_noopt=$_cflags_noopt
3347 add_cflags $_flags $_cflags
3348 cc_ldflags=$_ldflags
3349 set_ccvars CC
3350
3351 probe_cc hostcc "$host_cc"
3352 host_cflags_filter=$_flags_filter
3353 add_host_cflags  $_flags $_cflags
3354 set_ccvars HOSTCC
3355
3356 test -n "$cc_type" && enable $cc_type ||
3357     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3358
3359 : ${as_default:=$cc}
3360 : ${objcc_default:=$cc}
3361 : ${dep_cc_default:=$cc}
3362 : ${ld_default:=$cc}
3363 : ${host_ld_default:=$host_cc}
3364 set_default ar as objcc dep_cc ld host_ld
3365
3366 probe_cc as "$as"
3367 asflags_filter=$_flags_filter
3368 add_asflags $_flags $_cflags
3369 set_ccvars AS
3370
3371 probe_cc objcc "$objcc"
3372 objcflags_filter=$_flags_filter
3373 add_objcflags $_flags $_cflags
3374 set_ccvars OBJC
3375
3376 probe_cc ld "$ld"
3377 ldflags_filter=$_flags_filter
3378 add_ldflags $_flags $_ldflags
3379 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3380 LD_O=${_ld_o-$LD_O}
3381 LD_LIB=${_ld_lib-$LD_LIB}
3382 LD_PATH=${_ld_path-$LD_PATH}
3383
3384 probe_cc hostld "$host_ld"
3385 host_ldflags_filter=$_flags_filter
3386 add_host_ldflags $_flags $_ldflags
3387 HOSTLD_O=${_ld_o-$HOSTLD_O}
3388
3389 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3390     probe_cc depcc "$dep_cc"
3391     CCDEP=${_DEPCMD:-$DEPCMD}
3392     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3393     DEPCCFLAGS=$_flags
3394 fi
3395
3396 if $ar 2>&1 | grep -q Microsoft; then
3397     arflags="-nologo"
3398     ar_o='-out:$@'
3399 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3400     arflags="rq"
3401     ar_o='$@'
3402 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3403     arflags='-Xany -r -c'
3404     ar_o='$@'
3405 else
3406     arflags="rc"
3407     ar_o='$@'
3408 fi
3409
3410 add_cflags $extra_cflags
3411 add_objcflags $extra_objcflags
3412 add_asflags $extra_cflags
3413
3414 if test -n "$sysroot"; then
3415     case "$cc_type" in
3416         gcc|llvm_gcc|clang)
3417             add_cppflags --sysroot="$sysroot"
3418             add_ldflags --sysroot="$sysroot"
3419         ;;
3420         tms470)
3421             add_cppflags -I"$sysinclude"
3422             add_ldflags  --sysroot="$sysroot"
3423         ;;
3424     esac
3425 fi
3426
3427 if test "$cpu" = host; then
3428     enabled cross_compile &&
3429         die "--cpu=host makes no sense when cross-compiling."
3430
3431     case "$cc_type" in
3432         gcc|llvm_gcc)
3433             check_native(){
3434                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3435                 sed -n "/cc1.*$1=/{
3436                             s/.*$1=\\([^ ]*\\).*/\\1/
3437                             p
3438                             q
3439                         }" $TMPE
3440             }
3441             cpu=$(check_native -march || check_native -mcpu)
3442         ;;
3443     esac
3444
3445     test "${cpu:-host}" = host &&
3446         die "--cpu=host not supported with compiler $cc"
3447 fi
3448
3449 # Deal with common $arch aliases
3450 case "$arch" in
3451     aarch64|arm64)
3452         arch="aarch64"
3453     ;;
3454     arm*)
3455         arch="arm"
3456     ;;
3457     mips*|IP*)
3458         case "$arch" in
3459         *el)
3460             add_cppflags -EL
3461             add_ldflags -EL
3462         ;;
3463         *eb)
3464             add_cppflags -EB
3465             add_ldflags -EB
3466         ;;
3467         esac
3468         arch="mips"
3469     ;;
3470     parisc*|hppa*)
3471         arch="parisc"
3472     ;;
3473     "Power Macintosh"|ppc*|powerpc*)
3474         arch="ppc"
3475     ;;
3476     s390|s390x)
3477         arch="s390"
3478     ;;
3479     sh4|sh)
3480         arch="sh4"
3481     ;;
3482     sun4u|sparc*)
3483         arch="sparc"
3484     ;;
3485     tilegx|tile-gx)
3486         arch="tilegx"
3487     ;;
3488     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3489         arch="x86"
3490     ;;
3491 esac
3492
3493 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3494 enable $arch
3495
3496 # Add processor-specific flags
3497 if enabled aarch64; then
3498
3499     case $cpu in
3500         armv*)
3501             cpuflags="-march=$cpu"
3502         ;;
3503         *)
3504             cpuflags="-mcpu=$cpu"
3505         ;;
3506     esac
3507
3508 elif enabled alpha; then
3509
3510     cpuflags="-mcpu=$cpu"
3511
3512 elif enabled arm; then
3513
3514     check_arm_arch() {
3515         check_cpp_condition stddef.h \
3516             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3517             $cpuflags
3518     }
3519
3520     probe_arm_arch() {
3521         if   check_arm_arch 4;        then echo armv4
3522         elif check_arm_arch 4T;       then echo armv4t
3523         elif check_arm_arch 5;        then echo armv5
3524         elif check_arm_arch 5E;       then echo armv5e
3525         elif check_arm_arch 5T;       then echo armv5t
3526         elif check_arm_arch 5TE;      then echo armv5te
3527         elif check_arm_arch 5TEJ;     then echo armv5te
3528         elif check_arm_arch 6;        then echo armv6
3529         elif check_arm_arch 6J;       then echo armv6j
3530         elif check_arm_arch 6K;       then echo armv6k
3531         elif check_arm_arch 6Z;       then echo armv6z
3532         elif check_arm_arch 6ZK;      then echo armv6zk
3533         elif check_arm_arch 6T2;      then echo armv6t2
3534         elif check_arm_arch 7;        then echo armv7
3535         elif check_arm_arch 7A  7_A;  then echo armv7-a
3536         elif check_arm_arch 7S;       then echo armv7-a
3537         elif check_arm_arch 7R  7_R;  then echo armv7-r
3538         elif check_arm_arch 7M  7_M;  then echo armv7-m
3539         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3540         elif check_arm_arch 8A  8_A;  then echo armv8-a
3541         fi
3542     }
3543
3544     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3545
3546     case $cpu in
3547         armv*)
3548             cpuflags="-march=$cpu"
3549             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3550         ;;
3551         *)
3552             cpuflags="-mcpu=$cpu"
3553             case $cpu in
3554                 cortex-a*)                               subarch=armv7a  ;;
3555                 cortex-r*)                               subarch=armv7r  ;;
3556                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3557                 arm11*)                                  subarch=armv6   ;;
3558                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3559                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3560                 *)                             subarch=$(probe_arm_arch) ;;
3561             esac
3562         ;;
3563     esac
3564
3565     case "$subarch" in
3566         armv5t*)    enable fast_clz                ;;
3567         armv[6-8]*) enable fast_clz fast_unaligned ;;
3568     esac
3569
3570 elif enabled avr32; then
3571
3572     case $cpu in
3573         ap7[02]0[0-2])
3574             subarch="avr32_ap"
3575             cpuflags="-mpart=$cpu"
3576         ;;
3577         ap)
3578             subarch="avr32_ap"
3579             cpuflags="-march=$cpu"
3580         ;;
3581         uc3[ab]*)
3582             subarch="avr32_uc"
3583             cpuflags="-mcpu=$cpu"
3584         ;;
3585         uc)
3586             subarch="avr32_uc"
3587             cpuflags="-march=$cpu"
3588         ;;
3589     esac
3590
3591 elif enabled bfin; then
3592
3593     cpuflags="-mcpu=$cpu"
3594
3595 elif enabled mips; then
3596
3597     cpuflags="-march=$cpu"
3598
3599 elif enabled ppc; then
3600
3601     disable ldbrx
3602
3603     case $(tolower $cpu) in
3604         601|ppc601|powerpc601)
3605             cpuflags="-mcpu=601"
3606             disable altivec
3607         ;;
3608         603*|ppc603*|powerpc603*)
3609             cpuflags="-mcpu=603"
3610             disable altivec
3611         ;;
3612         604*|ppc604*|powerpc604*)
3613             cpuflags="-mcpu=604"
3614             disable altivec
3615         ;;
3616         g3|75*|ppc75*|powerpc75*)
3617             cpuflags="-mcpu=750"
3618             disable altivec
3619         ;;
3620         g4|745*|ppc745*|powerpc745*)
3621             cpuflags="-mcpu=7450"
3622             disable vsx
3623         ;;
3624         74*|ppc74*|powerpc74*)
3625             cpuflags="-mcpu=7400"
3626             disable vsx
3627         ;;
3628         g5|970|ppc970|powerpc970)
3629             cpuflags="-mcpu=970"
3630             disable vsx
3631         ;;
3632         power[3-6]*)
3633             cpuflags="-mcpu=$cpu"
3634             disable vsx
3635         ;;
3636         power[7-8]*)
3637             cpuflags="-mcpu=$cpu"
3638             enable ldbrx
3639         ;;
3640         cell)
3641             cpuflags="-mcpu=cell"
3642             enable ldbrx
3643             disable vsx
3644         ;;
3645         e500mc)
3646             cpuflags="-mcpu=e500mc"
3647             disable altivec
3648         ;;
3649         e500v2)
3650             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3651             disable altivec
3652             disable dcbzl
3653         ;;
3654         e500)
3655             cpuflags="-mcpu=8540 -mhard-float"
3656             disable altivec
3657             disable dcbzl
3658         ;;
3659     esac
3660
3661 elif enabled sparc; then
3662
3663     case $cpu in
3664         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3665             cpuflags="-mcpu=$cpu"
3666         ;;
3667         ultrasparc*|niagara[234])
3668             cpuflags="-mcpu=$cpu"
3669         ;;
3670     esac
3671
3672 elif enabled x86; then
3673
3674     case $cpu in
3675         i[345]86|pentium)
3676             cpuflags="-march=$cpu"
3677             disable i686
3678             disable mmx
3679         ;;
3680         # targets that do NOT support nopl and conditional mov (cmov)
3681         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3682             cpuflags="-march=$cpu"
3683             disable i686
3684         ;;
3685         # targets that do support nopl and conditional mov (cmov)
3686         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3687             cpuflags="-march=$cpu"
3688             enable i686
3689             enable fast_cmov
3690         ;;
3691         # targets that do support conditional mov but on which it's slow
3692         pentium4|pentium4m|prescott|nocona)
3693             cpuflags="-march=$cpu"
3694             enable i686
3695             disable fast_cmov
3696         ;;
3697     esac
3698
3699 fi
3700
3701 if [ "$cpu" != generic ]; then
3702     add_cflags  $cpuflags
3703     add_asflags $cpuflags
3704     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3705 fi
3706
3707 # compiler sanity check
3708 check_exec <<EOF
3709 int main(void){ return 0; }
3710 EOF
3711 if test "$?" != 0; then
3712     echo "$cc is unable to create an executable file."
3713     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3714         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3715         echo "Only do this if you know what cross compiling means."
3716     fi
3717     die "C compiler test failed."
3718 fi
3719
3720 add_cppflags -D_ISOC99_SOURCE
3721
3722 # some compilers silently accept -std=c11, so we also need to check that the
3723 # version macro is defined properly
3724 if test_cflags_cpp -std=c11 "__STDC_VERSION__ >= 201112L"; then
3725     add_cflags -std=c11
3726 else
3727     check_cflags -std=c99
3728 fi
3729
3730 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3731 #include <stdlib.h>
3732 EOF
3733 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3734 #include <stdlib.h>
3735 EOF
3736
3737 add_host_cppflags -D_ISOC99_SOURCE
3738 check_host_cflags -std=c99
3739 check_host_cflags -Wall
3740 check_host_cflags -O3
3741
3742 check_64bit(){
3743     arch32=$1
3744     arch64=$2
3745     expr=$3
3746     check_code cc "" "int test[2*($expr) - 1]" &&
3747         subarch=$arch64 || subarch=$arch32
3748 }
3749
3750 case "$arch" in
3751     aarch64|alpha|ia64)
3752         spic=$shared
3753     ;;
3754     mips)
3755         check_64bit mips mips64 '_MIPS_SIM > 1'
3756         spic=$shared
3757     ;;
3758     parisc)
3759         check_64bit parisc parisc64 'sizeof(void *) > 4'
3760         spic=$shared
3761     ;;
3762     ppc)
3763         check_64bit ppc ppc64 'sizeof(void *) > 4'
3764         spic=$shared
3765     ;;
3766     s390)
3767         check_64bit s390 s390x 'sizeof(void *) > 4'
3768         spic=$shared
3769     ;;
3770     sparc)
3771         check_64bit sparc sparc64 'sizeof(void *) > 4'
3772         spic=$shared
3773     ;;
3774     x86)
3775         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3776         if test "$subarch" = "x86_64"; then
3777             spic=$shared
3778         fi
3779     ;;
3780 esac
3781
3782 enable $subarch
3783 enabled spic && enable_weak pic
3784
3785 # OS specific
3786 case $target_os in
3787     aix)
3788         SHFLAGS=-shared
3789         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3790         enabled shared && add_ldflags -Wl,-brtl
3791         ;;
3792     android)
3793         disable symver
3794         enable section_data_rel_ro
3795         SLIB_INSTALL_NAME='$(SLIBNAME)'
3796         SLIB_INSTALL_LINKS=
3797         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3798         ;;
3799     haiku)
3800         prefix_default="/boot/common"
3801         network_extralibs="-lnetwork"
3802         host_libs=
3803         ;;
3804     sunos)
3805         SHFLAGS='-shared -Wl,-h,$$(@F)'
3806         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3807         network_extralibs="-lsocket -lnsl"
3808         # When using suncc to build, the Solaris linker will mark
3809         # an executable with each instruction set encountered by
3810         # the Solaris assembler.  As our libraries contain their own
3811         # guards for processor-specific code, instead suppress
3812         # generation of the HWCAPS ELF section on Solaris x86 only.
3813         enabled_all suncc x86 &&
3814             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3815             add_ldflags -Wl,-M,mapfile
3816         nm_default='nm -P -g'
3817         version_script='-M'
3818         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3819         ;;
3820     netbsd)
3821         disable symver
3822         oss_indev_extralibs="-lossaudio"
3823         oss_outdev_extralibs="-lossaudio"
3824         ;;
3825     openbsd|bitrig)
3826         disable symver
3827         SHFLAGS='-shared'
3828         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3829         SLIB_INSTALL_LINKS=
3830         oss_indev_extralibs="-lossaudio"
3831         oss_outdev_extralibs="-lossaudio"
3832         ;;
3833     dragonfly)
3834         disable symver
3835         ;;
3836     freebsd)
3837         ;;
3838     bsd/os)
3839         add_extralibs -lpoll -lgnugetopt
3840         ;;
3841     darwin)
3842         enabled ppc && add_asflags -force_cpusubtype_ALL
3843         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3844         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3845         add_ldflags -Wl,-dynamic,-search_paths_first
3846         SLIBSUF=".dylib"
3847         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3848         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3849         objformat="macho"
3850         enabled x86_64 && objformat="macho64"
3851         enabled_any pic shared ||
3852             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3853         check_header dispatch/dispatch.h &&
3854             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3855         ;;
3856     msys*)
3857         die "Native MSYS builds are discouraged, please use the MINGW environment."
3858         ;;
3859     mingw32*|mingw64*)
3860         if test $target_os = "mingw32ce"; then
3861             disable network
3862         else
3863             target_os=mingw32
3864         fi
3865         LIBTARGET=i386
3866         if enabled x86_64; then
3867             LIBTARGET="i386:x86-64"
3868         elif enabled arm; then
3869             LIBTARGET=arm-wince
3870         fi
3871         check_ldflags -Wl,--nxcompat
3872         check_ldflags -Wl,--dynamicbase
3873         shlibdir_default="$bindir_default"
3874         SLIBPREF=""
3875         SLIBSUF=".dll"
3876         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3877         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3878         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3879         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3880         SLIB_INSTALL_LINKS=
3881         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3882         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3883         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3884         objformat="win32"
3885         dlltool="${cross_prefix}dlltool"
3886         ranlib=:
3887         enable dos_paths
3888         ;;
3889     win32|win64)
3890         disable symver
3891         if enabled shared; then
3892             # Link to the import library instead of the normal static library
3893             # for shared libs.
3894             LD_LIB='%.lib'
3895             # Cannot build both shared and static libs with MSVC or icl.
3896             disable static
3897         fi
3898         shlibdir_default="$bindir_default"
3899         SLIBPREF=""
3900         SLIBSUF=".dll"
3901         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3902         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3903         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3904         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3905         SLIB_INSTALL_LINKS=
3906         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3907         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3908         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3909         objformat="win32"
3910         ranlib=:
3911         enable dos_paths
3912         ;;
3913     cygwin*)
3914         target_os=cygwin
3915         shlibdir_default="$bindir_default"
3916         SLIBPREF="cyg"
3917         SLIBSUF=".dll"
3918         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3919         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3920         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3921         SLIB_INSTALL_LINKS=
3922         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3923         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3924         objformat="win32"
3925         enable dos_paths
3926         ;;
3927     *-dos|freedos|opendos)
3928         network_extralibs="-lsocket"
3929         objformat="coff"
3930         enable dos_paths
3931         add_cppflags -U__STRICT_ANSI__
3932         ;;
3933     linux)
3934         enable dv1394
3935         enable section_data_rel_ro
3936         ;;
3937     irix*)
3938         target_os=irix
3939         ranlib="echo ignoring ranlib"
3940         ;;
3941     os/2*)
3942         ln_s="cp -f"
3943         objformat="aout"
3944         add_cppflags -D_GNU_SOURCE
3945         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3946         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3947         LIBSUF="_s.a"
3948         SLIBPREF=""
3949         SLIBSUF=".dll"
3950         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3951         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3952         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3953             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3954             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3955             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3956             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3957         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3958             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3959         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3960         enable dos_paths
3961         ;;
3962     gnu/kfreebsd)
3963         add_cppflags -D_BSD_SOURCE
3964         ;;
3965     gnu)
3966         ;;
3967     qnx)
3968         add_cppflags -D_QNX_SOURCE
3969         network_extralibs="-lsocket"
3970         ;;
3971     symbian)
3972         SLIBSUF=".dll"
3973         enable dos_paths
3974         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3975         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3976         add_ldflags -Wl,--target1-abs,--no-undefined \
3977                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3978                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3979         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3980                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3981                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3982         ;;
3983     osf1)
3984         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3985         ;;
3986     minix)
3987         ;;
3988     none)
3989         ;;
3990     *)
3991         die "Unknown OS '$target_os'."
3992         ;;
3993 esac
3994
3995 # determine libc flavour
3996
3997 probe_libc(){
3998     pfx=$1
3999     pfx_no_=${pfx%_}
4000     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4001     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4002         eval ${pfx}libc_type=uclibc
4003         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4004     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4005         eval ${pfx}libc_type=glibc
4006         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4007     # MinGW headers can be installed on Cygwin, so check for newlib first.
4008     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4009         eval ${pfx}libc_type=newlib
4010         add_${pfx}cppflags -U__STRICT_ANSI__
4011     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4012     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4013         eval ${pfx}libc_type=mingw64
4014         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4015         eval test \$${pfx_no_}cc_type = "gcc" &&
4016             add_${pfx}cppflags -D__printf__=__gnu_printf__
4017     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4018          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4019         eval ${pfx}libc_type=mingw32
4020         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4021             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4022             die "ERROR: MinGW32 runtime version must be >= 3.15."
4023         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4024         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4025             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4026         eval test \$${pfx_no_}cc_type = "gcc" &&
4027             add_${pfx}cppflags -D__printf__=__gnu_printf__
4028     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4029         eval ${pfx}libc_type=msvcrt
4030         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4031             if [ "$pfx" = host_ ]; then
4032                 add_host_cppflags -Dsnprintf=_snprintf
4033             else
4034                 add_compat strtod.o strtod=avpriv_strtod
4035                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4036                                              _snprintf=avpriv_snprintf  \
4037                                              vsnprintf=avpriv_vsnprintf
4038             fi
4039         fi
4040         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4041         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4042         # 0x601 by default unless something else is set by the user.
4043         # This can easily lead to us detecting functions only present
4044         # in such new versions and producing binaries requiring windows 7.0.
4045         # Therefore explicitly set the default to XP unless the user has
4046         # set something else on the command line.
4047         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4048         # family. For these cases, configure is free to use any functions
4049         # found in the SDK headers by default. (Alternatively, we could force
4050         # _WIN32_WINNT to 0x0602 in that case.)
4051         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4052             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4053 #ifdef WINAPI_FAMILY
4054 #include <winapifamily.h>
4055 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4056 #error not desktop
4057 #endif
4058 #endif
4059 EOF
4060         if [ "$pfx" = "" ]; then
4061             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4062         fi
4063     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4064         eval ${pfx}libc_type=klibc
4065     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4066         eval ${pfx}libc_type=bionic
4067     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4068         eval ${pfx}libc_type=solaris
4069         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4070     else
4071         eval ${pfx}libc_type=default
4072         add_${pfx}cppflags -D_DEFAULT_SOURCE
4073     fi
4074 }
4075
4076 probe_libc
4077 test -n "$libc_type" && enable libc_$libc_type
4078 probe_libc host_
4079 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4080
4081 case $libc_type in
4082     bionic)
4083         add_compat strtod.o strtod=avpriv_strtod
4084         ;;
4085 esac
4086
4087 # hacks for compiler/libc/os combinations
4088
4089 if enabled_all tms470 libc_glibc; then
4090     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4091     add_cppflags -D__USER_LABEL_PREFIX__=
4092     add_cppflags -D__builtin_memset=memset
4093     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4094     add_cflags   -pds=48    # incompatible redefinition of macro
4095 fi
4096
4097 if enabled_all ccc libc_glibc; then
4098     add_ldflags -Wl,-z,now  # calls to libots crash without this
4099 fi
4100
4101 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4102     add_cppflags '-I\$(SRC_PATH)/compat/float'
4103
4104 esc(){
4105     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4106 }
4107
4108 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4109
4110 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4111
4112 set_default $PATHS_LIST
4113 set_default nm
4114
4115 # we need to build at least one lib type
4116 if ! enabled_any static shared; then
4117     cat <<EOF
4118 At least one library type must be built.
4119 Specify --enable-static to build the static libraries or --enable-shared to
4120 build the shared libraries as well. To only build the shared libraries specify
4121 --disable-static in addition to --enable-shared.
4122 EOF
4123     exit 1
4124 fi
4125
4126 disabled optimizations || check_cflags -fomit-frame-pointer
4127
4128 enable_weak_pic() {
4129     disabled pic && return
4130     enable pic
4131     add_cppflags -DPIC
4132     case "$target_os" in
4133     mingw*|cygwin*)
4134         ;;
4135     *)
4136         add_cflags -fPIC
4137         ;;
4138     esac
4139     add_asflags  -fPIC
4140 }
4141
4142 enabled pic && enable_weak_pic
4143
4144 check_cc <<EOF || die "Symbol mangling check failed."
4145 int ff_extern;
4146 EOF
4147 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4148 extern_prefix=${sym%%ff_extern*}
4149
4150 check_cc <<EOF && enable_weak inline_asm
4151 void foo(void) { __asm__ volatile ("" ::); }
4152 EOF
4153
4154 _restrict=
4155 for restrict_keyword in restrict __restrict__ __restrict; do
4156     check_cc <<EOF && _restrict=$restrict_keyword && break
4157 void foo(char * $restrict_keyword p);
4158 EOF
4159 done
4160
4161 check_cc <<EOF && enable pragma_deprecated
4162 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4163 EOF
4164
4165 check_cc <<EOF && enable attribute_packed
4166 struct { int x; } __attribute__((packed)) x;
4167 EOF
4168
4169 check_cc <<EOF && enable attribute_may_alias
4170 union { int x; } __attribute__((may_alias)) x;
4171 EOF
4172
4173 check_cc <<EOF || die "endian test failed"
4174 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4175 EOF
4176 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4177
4178 check_gas() {
4179     log "check_gas using '$as' as AS"
4180     # :vararg is used on aarch64, arm and ppc altivec
4181     check_as <<EOF || return 1
4182 .macro m n, y:vararg=0
4183 \n: .int \y
4184 .endm
4185 m x
4186 EOF
4187     # .altmacro is only used in arm asm
4188     ! enabled arm || check_as <<EOF || return 1
4189 .altmacro
4190 EOF
4191     enable gnu_as
4192     return 0
4193 }
4194
4195 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4196     nogas=:
4197     enabled_any arm aarch64 && nogas=die
4198     enabled_all ppc altivec && nogas=warn
4199     as_noop=-v
4200
4201     case $as_type in
4202         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4203         gcc)  gaspp_as_type=gas ;;
4204         *)    gaspp_as_type=$as_type ;;
4205     esac
4206
4207     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4208
4209     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4210         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4211
4212     if ! check_gas ; then
4213         as=${gas:=$as}
4214         check_gas || \
4215             $nogas "GNU assembler not found, install/update gas-preprocessor"
4216     fi
4217
4218     check_as <<EOF && enable as_func
4219 .func test
4220 .endfunc
4221 EOF
4222 fi
4223
4224 check_inline_asm inline_asm_labels '"1:\n"'
4225
4226 if enabled aarch64; then
4227     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4228     # internal assembler in clang 3.3 does not support this instruction
4229     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4230     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4231
4232     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4233
4234 elif enabled alpha; then
4235
4236     check_cflags -mieee
4237
4238 elif enabled arm; then
4239
4240     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4241     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4242     enabled thumb && check_cflags -mthumb || check_cflags -marm
4243
4244     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4245         enable vfp_args
4246     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4247         enable vfp_args
4248     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4249         case "${cross_prefix:-$cc}" in
4250             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4251             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4252 __asm__ (".eabi_attribute 28, 1");
4253 int main(void) { return 0; }
4254 EOF
4255         esac
4256         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4257     fi
4258
4259     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4260     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4261     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4262     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4263     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4264     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4265
4266     [ $target_os = linux ] || [ $target_os = android ] ||
4267         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4268             $ARCH_EXT_LIST_ARM
4269
4270     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4271
4272     check_as <<EOF && enable as_dn_directive
4273 ra .dn d0.i16
4274 .unreq ra
4275 EOF
4276     check_as <<EOF && enable as_fpu_directive
4277 .fpu neon
4278 EOF
4279
4280     # llvm's integrated assembler supports .object_arch from llvm 3.5
4281     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4282 .object_arch armv4
4283 EOF
4284
4285     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4286
4287 elif enabled mips; then
4288
4289     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4290
4291     # make sure that only an instruction set is enabled
4292     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4293
4294     if enabled mips64; then
4295         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4296             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4297                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4298     else
4299         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4300             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4301                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4302     fi
4303
4304 elif enabled parisc; then
4305
4306     if enabled gcc; then
4307         case $($cc -dumpversion) in
4308             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4309         esac
4310     fi
4311
4312 elif enabled ppc; then
4313
4314     enable local_aligned_8 local_aligned_16 local_aligned_32
4315
4316     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4317     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4318     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4319     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4320
4321     # AltiVec flags: The FSF version of GCC differs from the Apple version
4322     if enabled altivec; then
4323         check_cflags -maltivec -mabi=altivec &&
4324         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4325         check_cflags -faltivec
4326
4327         # check if our compiler supports Motorola AltiVec C API
4328         check_cc <<EOF || disable altivec
4329 $inc_altivec_h
4330 int main(void) {
4331     vector signed int v1 = (vector signed int) { 0 };
4332     vector signed int v2 = (vector signed int) { 1 };
4333     v1 = vec_add(v1, v2);
4334     return 0;
4335 }
4336 EOF
4337
4338         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4339     fi
4340
4341     if enabled vsx; then
4342         check_cflags -mvsx &&
4343         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4344     fi
4345
4346     if enabled power8; then
4347         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4348     fi
4349
4350 elif enabled x86; then
4351
4352     check_builtin rdtsc    intrin.h   "__rdtsc()"
4353     check_builtin mm_empty mmintrin.h "_mm_empty()"
4354
4355     enable local_aligned_8 local_aligned_16 local_aligned_32
4356
4357     # check whether EBP is available on x86
4358     # As 'i' is stored on the stack, this program will crash
4359     # if the base pointer is used to access it because the
4360     # base pointer is cleared in the inline assembly code.
4361     check_exec_crash <<EOF && enable ebp_available
4362 volatile int i=0;
4363 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4364 return i;
4365 EOF
4366
4367     # check whether EBX is available on x86
4368     check_inline_asm ebx_available '""::"b"(0)' &&
4369         check_inline_asm ebx_available '"":::"%ebx"'
4370
4371     # check whether xmm clobbers are supported
4372     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4373
4374     # check whether binutils is new enough to compile SSSE3/MMXEXT
4375     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4376     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4377
4378     if ! disabled_any asm mmx yasm; then
4379         if check_cmd $yasmexe --version; then
4380             enabled x86_64 && yasm_extra="-m amd64"
4381             yasm_debug="-g dwarf2"
4382         elif check_cmd nasm -v; then
4383             yasmexe=nasm
4384             yasm_debug="-g -F dwarf"
4385             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4386         fi
4387
4388         YASMFLAGS="-f $objformat $yasm_extra"
4389         enabled pic               && append YASMFLAGS "-DPIC"
4390         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4391         case "$objformat" in
4392             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4393         esac
4394
4395         check_yasm "movbe ecx, [5]" && enable yasm ||
4396             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4397         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4398         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4399         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4400         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4401         check_yasm "CPU amdnop" || disable cpunop
4402     fi
4403
4404     case "$cpu" in
4405         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4406             disable fast_clz
4407         ;;
4408     esac
4409
4410 fi
4411
4412 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4413
4414 check_ldflags -Wl,--as-needed
4415
4416 if check_func dlopen; then
4417     ldl=
4418 elif check_func dlopen -ldl; then
4419     ldl=-ldl
4420 fi
4421
4422 if ! disabled network; then
4423     check_func getaddrinfo $network_extralibs
4424     check_func inet_aton $network_extralibs
4425
4426     check_type netdb.h "struct addrinfo"
4427     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4428     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4429     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4430     check_type poll.h "struct pollfd"
4431     check_type netinet/sctp.h "struct sctp_event_subscribe"
4432     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4433     check_type netinet/in.h "struct sockaddr_in6"
4434     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4435     check_type "sys/types.h sys/socket.h" socklen_t
4436
4437     # Prefer arpa/inet.h over winsock2
4438     if check_header arpa/inet.h ; then
4439         check_func closesocket
4440     elif check_header winsock2.h ; then
4441         check_func_headers winsock2.h closesocket -lws2 &&
4442             network_extralibs="-lws2" ||
4443         { check_func_headers winsock2.h closesocket -lws2_32 &&
4444             network_extralibs="-lws2_32"; } || disable winsock2_h network
4445         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4446
4447         check_type ws2tcpip.h socklen_t
4448         check_type ws2tcpip.h "struct addrinfo"
4449         check_type ws2tcpip.h "struct group_source_req"
4450         check_type ws2tcpip.h "struct ip_mreq_source"
4451         check_type ws2tcpip.h "struct ipv6_mreq"
4452         check_type winsock2.h "struct pollfd"
4453         check_struct winsock2.h "struct sockaddr" sa_len
4454         check_type ws2tcpip.h "struct sockaddr_in6"
4455         check_type ws2tcpip.h "struct sockaddr_storage"
4456     else
4457         disable network
4458     fi
4459 fi
4460
4461 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4462 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4463 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4464 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4465
4466 case "$custom_allocator" in
4467     jemalloc)
4468         # jemalloc by default does not use a prefix
4469         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4470     ;;
4471     tcmalloc)
4472         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4473         malloc_prefix=tc_
4474     ;;
4475 esac
4476
4477 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4478 check_func  ${malloc_prefix}memalign            && enable memalign
4479 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4480
4481 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4482     check_func_headers time.h clock_gettime ||
4483         { check_lib time.h clock_gettime -lrt && LIBRT="-lrt"; }
4484
4485 check_func  fcntl
4486 check_func  fork
4487 check_func  gethrtime
4488 check_func  getopt
4489 check_func  getrusage
4490 check_func  gettimeofday
4491 check_func  gmtime_r
4492 check_func  isatty
4493 check_func  localtime_r
4494 check_func  mach_absolute_time
4495 check_func  mkstemp
4496 check_func  mmap
4497 check_func  mprotect
4498 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4499 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4500 check_func  sched_getaffinity
4501 check_func  setrlimit
4502 check_func  strerror_r
4503 check_func  sysconf
4504 check_func  sysctl
4505 check_func  usleep
4506
4507 check_func_headers io.h setmode
4508 check_func_headers stdlib.h getenv
4509
4510 check_func_headers windows.h CoTaskMemFree -lole32
4511 check_func_headers windows.h GetProcessAffinityMask
4512 check_func_headers windows.h GetProcessTimes
4513 check_func_headers windows.h GetSystemTimeAsFileTime
4514 check_func_headers windows.h LoadLibrary
4515 check_func_headers windows.h MapViewOfFile
4516 check_func_headers windows.h SetConsoleTextAttribute
4517 check_func_headers windows.h Sleep
4518 check_func_headers windows.h VirtualAlloc
4519 check_struct windows.h "CONDITION_VARIABLE" Ptr
4520
4521 check_header direct.h
4522 check_header dlfcn.h
4523 check_header d3d11.h
4524 check_header dxva.h
4525 check_header dxva2api.h
4526 check_header io.h
4527 check_header mach/mach_time.h
4528 check_header malloc.h
4529 check_header poll.h
4530 check_header sys/mman.h
4531 check_header sys/param.h
4532 check_header sys/resource.h
4533 check_header sys/select.h
4534 check_header sys/time.h
4535 check_header sys/un.h
4536 check_header unistd.h
4537 check_header valgrind/valgrind.h
4538 check_header vdpau/vdpau.h
4539 check_header vdpau/vdpau_x11.h
4540 check_header VideoDecodeAcceleration/VDADecoder.h
4541 check_header windows.h
4542 check_header X11/extensions/XvMClib.h
4543
4544 # it seems there are versions of clang in some distros that try to use the
4545 # gcc headers, which explodes for stdatomic
4546 # so we also check that atomics actually work here
4547 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4548
4549 check_lib "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4550 check_lib "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4551 check_lib "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4552
4553 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4554
4555 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4556 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4557 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4558
4559 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4560 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4561 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4562 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4563 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4564
4565 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4566
4567 if ! disabled w32threads && ! enabled pthreads; then
4568     check_func_headers "windows.h process.h" _beginthreadex &&
4569         enable w32threads || disable w32threads
4570 fi
4571
4572 # check for some common methods of building with pthread support
4573 # do this before the optional library checks as some of them require pthreads
4574 if ! disabled pthreads && ! enabled w32threads; then
4575     enable pthreads
4576     if check_func pthread_join -pthread; then
4577         add_cflags -pthread
4578         add_extralibs -pthread
4579     elif check_func pthread_join -pthreads; then
4580         add_cflags -pthreads
4581         add_extralibs -pthreads
4582     elif check_func pthread_join -lpthreadGC2; then
4583         add_extralibs -lpthreadGC2
4584     elif check_lib pthread.h pthread_join -lpthread; then
4585         :
4586     elif ! check_func pthread_join; then
4587         disable pthreads
4588     fi
4589 fi
4590
4591 enabled pthreads &&
4592     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4593
4594 disabled  zlib || check_lib  zlib.h      zlibVersion -lz   || disable  zlib
4595 disabled bzlib || check_lib bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4596
4597 check_lib math.h sin -lm && LIBM="-lm"
4598
4599 atan2f_args=2
4600 ldexpf_args=2
4601 powf_args=2
4602
4603 for func in $MATH_FUNCS; do
4604     eval check_mathfunc $func \${${func}_args:-1} $LIBM
4605 done
4606
4607 # these are off by default, so fail if requested and not available
4608 enabled avisynth          && { check_lib "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4609                                check_lib "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4610                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4611 enabled cuda              && check_lib cuda.h cuInit -lcuda
4612 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4613 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4614 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4615 enabled libdc1394         && require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new
4616 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4617 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4618 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4619 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4620 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4621 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4622                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4623                                done || die "ERROR: libgsm not found"; }
4624 enabled libhdcd           && require_pkg_config libhdcd "hdcd/hdcd_simple.h" hdcd_new
4625 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4626 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4627 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4628 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4629 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4630 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4631 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4632 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4633 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4634 enabled libopenjpeg       && { check_lib openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4635                                require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4636 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4637 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4638 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4639 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4640 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4641 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4642 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4643 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4644 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4645 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4646 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4647 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4648     enabled libvpx_vp8_decoder && {
4649         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4650             disable libvpx_vp8_decoder;
4651     }
4652     enabled libvpx_vp8_encoder && {
4653         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4654             disable libvpx_vp8_encoder;
4655     }
4656     enabled libvpx_vp9_decoder && {
4657         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4658             disable libvpx_vp9_decoder;
4659     }
4660     enabled libvpx_vp9_encoder && {
4661         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4662             disable libvpx_vp9_encoder;
4663     }
4664     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4665         die "libvpx enabled but no supported decoders found"
4666     fi
4667 }
4668 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4669 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4670 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4671                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4672                                die "ERROR: libx264 version must be >= 0.118."; } &&
4673                              { check_cpp_condition x264.h "X264_MPEG2" &&
4674                                enable libx262; }
4675 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4676                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4677                                die "ERROR: libx265 version must be >= 57."; }
4678 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4679 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4680 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4681                                 { ! enabled cross_compile && {
4682                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4683                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4684                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4685                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4686                                die "ERROR: mmal not found"; }
4687 enabled mmal && check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"
4688 enabled omx_rpi && enable omx
4689 enabled omx               && { check_header OMX_Core.h ||
4690                                 { ! enabled cross_compile && enabled omx_rpi && {
4691                                     add_cflags -isystem/opt/vc/include/IL ; }
4692                                 check_header OMX_Core.h ; } ||
4693                                die "ERROR: OpenMAX IL headers not found"; }
4694 enabled openssl           && { { check_pkg_config openssl openssl/ssl.h OPENSSL_init_ssl ||
4695                                  check_pkg_config openssl openssl/ssl.h SSL_library_init; } && {
4696                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4697                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4698                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4699                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4700                                die "ERROR: openssl not found"; }
4701
4702 enabled gnutls            && check_lib gmp.h mpz_export -lgmp && enable gmp
4703
4704 if enabled nvenc; then
4705     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4706     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6" ||
4707         die "ERROR: NVENC API version 5 or older is not supported"
4708 fi
4709
4710 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4711     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4712     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4713     enable sdl
4714 fi
4715
4716 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4717 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4718
4719 check_header linux/fb.h
4720 check_header linux/videodev2.h
4721 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4722
4723 check_header AVFoundation/AVFoundation.h &&
4724     check_objcflags -fobjc-arc &&
4725     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4726     disable AVFoundation_AVFoundation_h
4727
4728 check_header sys/videoio.h
4729
4730 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4731 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4732 # w32api 3.12 had it defined wrong
4733 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4734
4735 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4736 { check_header dev/bktr/ioctl_meteor.h &&
4737   check_header dev/bktr/ioctl_bt848.h; } ||
4738 { check_header machine/ioctl_meteor.h &&
4739   check_header machine/ioctl_bt848.h; } ||
4740 { check_header dev/video/meteor/ioctl_meteor.h &&
4741   check_header dev/video/bktr/ioctl_bt848.h; } ||
4742 check_header dev/ic/bt8xx.h
4743
4744 check_header sndio.h
4745 check_header sys/soundcard.h
4746 check_header soundcard.h
4747
4748 enabled_any alsa_indev alsa_outdev &&
4749     check_lib alsa/asoundlib.h snd_pcm_htimestamp -lasound
4750
4751 enabled jack_indev && check_lib jack/jack.h jack_client_open -ljack &&
4752     check_func jack_port_get_latency_range -ljack
4753
4754 enabled_any sndio_indev sndio_outdev && check_lib sndio.h sio_open -lsndio
4755
4756 if enabled libcdio; then
4757     check_lib "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4758     check_lib "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4759     die "ERROR: No usable libcdio/cdparanoia found"
4760 fi
4761
4762 if enabled libxcb; then
4763     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4764         enabled libxcb && die "ERROR: libxcb not found";
4765     } && enable libxcb
4766
4767     disabled libxcb_shm ||
4768         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4769             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4770         } && check_header sys/shm.h && enable libxcb_shm
4771
4772     disabled libxcb_xfixes ||
4773         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4774             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4775         } && enable libxcb_xfixes
4776
4777     add_cflags "$xcb_shape_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4778     add_extralibs "$xcb_shape_libs $xcb_shm_libs $xcb_xfixes_libs"
4779 fi
4780
4781 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4782
4783 enabled vaapi &&
4784     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4785     disable vaapi
4786
4787 enabled vaapi &&
4788     check_lib "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4789     enable vaapi_drm
4790
4791 enabled vaapi &&
4792     check_lib "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11 &&
4793     enable vaapi_x11
4794
4795 enabled vdpau &&
4796     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4797     disable vdpau
4798
4799 enabled vdpau &&
4800     check_lib "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11 &&
4801     enable vdpau_x11
4802
4803 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4804
4805 # add some useful compiler flags if supported
4806 check_cflags -Wdeclaration-after-statement
4807 check_cflags -Wall
4808 check_cflags -Wdisabled-optimization
4809 check_cflags -Wpointer-arith
4810 check_cflags -Wredundant-decls
4811 check_cflags -Wwrite-strings
4812 check_cflags -Wtype-limits
4813 check_cflags -Wundef
4814 check_cflags -Wmissing-prototypes
4815 check_cflags -Wstrict-prototypes
4816
4817 if enabled extra_warnings; then
4818     check_cflags -Wcast-qual
4819     check_cflags -Wextra
4820     check_cflags -Wpedantic
4821 fi
4822
4823 check_disable_warning(){
4824     warning_flag=-W${1#-Wno-}
4825     test_cflags $warning_flag && add_cflags $1
4826 }
4827
4828 check_disable_warning -Wno-parentheses
4829 check_disable_warning -Wno-switch
4830 check_disable_warning -Wno-format-zero-length
4831 check_disable_warning -Wno-pointer-sign
4832
4833 check_disable_warning_headers(){
4834     warning_flag=-W${1#-Wno-}
4835     test_cflags $warning_flag && append cflags_headers $1
4836 }
4837
4838 check_disable_warning_headers -Wno-deprecated-declarations
4839 check_disable_warning_headers -Wno-unused-variable
4840
4841 # add some linker flags
4842 check_ldflags -Wl,--warn-common
4843 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4844 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4845 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic