configure: Handle dxva2 optional components in the standard way
[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-avxsynth          Linux version of AviSynth
192   --enable-bzlib             bzip2 compression [autodetect]
193   --enable-frei0r            video filtering plugins
194   --enable-gnutls            crypto
195   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
196   --enable-libcdio           audio CD input
197   --enable-libdc1394         IEEE 1394/Firewire camera input
198   --enable-libdcadec         DCA audio decoding
199   --enable-libfaac           AAC audio encoding
200   --enable-libfdk-aac        AAC audio encoding/decoding
201   --enable-libfontconfig     font configuration and management
202   --enable-libfreetype       font rendering
203   --enable-libgsm            GSM audio encoding/decoding
204   --enable-libhdcd           HDCD decoding filter
205   --enable-libilbc           ILBC audio encoding/decoding
206   --enable-libkvazaar        HEVC video encoding
207   --enable-libmp3lame        MP3 audio encoding
208   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
209   --enable-libopencore-amrwb AMR-WB audio decoding
210   --enable-libopencv         computer vision
211   --enable-libopenh264       H.264 video encoding/decoding
212   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
213   --enable-libopus           Opus audio encoding/decoding
214   --enable-libpulse          Pulseaudio sound server
215   --enable-librtmp           RTMP streaming
216   --enable-libschroedinger   Dirac video encoding/decoding
217   --enable-libsnappy         snappy compression
218   --enable-libspeex          Speex audio encoding/decoding
219   --enable-libtheora         Theora video encoding/decoding
220   --enable-libtwolame        MP2 audio encoding
221   --enable-libvo-aacenc      AAC audio encoding
222   --enable-libvo-amrwbenc    AMR-WB audio encoding
223   --enable-libvorbis         Vorbis audio encoding/decoding
224   --enable-libvpx            VP* video encoding/decoding
225   --enable-libwavpack        Wavpack audio encoding/decoding
226   --enable-libwebp           WebP image encoding/decoding
227   --enable-libx264           H.264 video encoding
228   --enable-libx265           HEVC video encoding
229   --enable-libxavs           Chinese AVS video encoding
230   --enable-libxcb            X window system protocol communication
231   --enable-libxcb-shm        X11 shm communication [auto]
232   --enable-libxcb-xfixes     X11 mouse rendering [auto]
233   --enable-libxvid           MPEG-4 ASP video encoding
234   --enable-openssl           crypto
235   --enable-zlib              compression [autodetect]
236
237   The following libraries provide various hardware acceleration features:
238   --enable-cuda    Nvidia CUDA (dynamically linked)
239   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
240   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
241   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
242   --enable-libnpp  Nvidia CUDA processing
243   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
244   --enable-nvenc   Nvidia video encoding
245   --enable-omx     OpenMAX IL
246   --enable-omx-rpi OpenMAX IL for Raspberry Pi
247   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
248   --enable-vda     Apple Video Decode Acceleration [auto]
249   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
250
251 Toolchain options:
252   --arch=ARCH              select architecture [$arch]
253   --cpu=CPU                select the minimum required CPU (affects
254                            instruction selection, may crash on older CPUs)
255   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
256   --enable-cross-compile   assume a cross-compiler is used
257   --sysroot=PATH           root of cross-build tree
258   --sysinclude=PATH        location of cross-build system headers
259   --target-os=OS           compiler targets OS [$target_os]
260   --target-exec=CMD        command to run executables on target
261   --target-path=DIR        path to view of build directory on target
262   --target-samples=DIR     path to samples directory on target
263   --toolchain=NAME         set tool defaults according to NAME
264   --nm=NM                  use nm tool
265   --ar=AR                  use archive tool AR [$ar_default]
266   --as=AS                  use assembler AS [$as_default]
267   --cc=CC                  use C compiler CC [$cc_default]
268   --objcc=OCC              use ObjC compiler OCC [$cc_default]
269   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
270   --ld=LD                  use linker LD
271   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
272   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
273   --host-cc=HOSTCC         use host C compiler HOSTCC
274   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
275   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
276   --host-ld=HOSTLD         use host linker HOSTLD
277   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
278   --host-libs=HLIBS        use libs HLIBS when linking for host
279   --host-os=OS             compiler host OS [$target_os]
280   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
281   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
282   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
283   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
284   --extra-libs=ELIBS       add ELIBS [$ELIBS]
285   --extra-version=STRING   version string suffix []
286   --optflags=OPTFLAGS      override optimization-related compiler flags
287   --enable-pic             build position-independent code
288   --enable-thumb           compile for Thumb instruction set
289   --enable-lto             use link-time optimization
290   --env="ENV=override"     override the environment variables
291
292 Advanced options (experts only):
293   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
294   --custom-allocator=NAME  use a supported custom allocator
295   --disable-symver         disable symbol versioning
296   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
297   --disable-safe-bitstream-reader
298                            disable buffer boundary checking in bitreaders
299                            (faster, but may crash)
300   --enable-sram            allow use of on-chip SRAM
301
302 Optimization options (experts only):
303   --disable-asm            disable all assembly optimizations
304   --disable-altivec        disable AltiVec optimizations
305   --disable-vsx            disable VSX optimizations
306   --disable-power8         disable POWER8 optimizations
307   --disable-amd3dnow       disable 3DNow! optimizations
308   --disable-amd3dnowext    disable 3DNow! extended optimizations
309   --disable-mmx            disable MMX optimizations
310   --disable-mmxext         disable MMXEXT optimizations
311   --disable-sse            disable SSE optimizations
312   --disable-sse2           disable SSE2 optimizations
313   --disable-sse3           disable SSE3 optimizations
314   --disable-ssse3          disable SSSE3 optimizations
315   --disable-sse4           disable SSE4 optimizations
316   --disable-sse42          disable SSE4.2 optimizations
317   --disable-avx            disable AVX optimizations
318   --disable-xop            disable XOP optimizations
319   --disable-fma3           disable FMA3 optimizations
320   --disable-fma4           disable FMA4 optimizations
321   --disable-avx2           disable AVX2 optimizations
322   --disable-armv5te        disable armv5te optimizations
323   --disable-armv6          disable armv6 optimizations
324   --disable-armv6t2        disable armv6t2 optimizations
325   --disable-vfp            disable VFP optimizations
326   --disable-neon           disable NEON optimizations
327   --disable-inline-asm     disable use of inline assembly
328   --disable-yasm           disable use of nasm/yasm assembly
329
330 Developer options (useful when working on Libav itself):
331   --disable-debug          disable debugging symbols
332   --enable-debug=LEVEL     set the debug level [$debuglevel]
333   --disable-optimizations  disable compiler optimizations
334   --enable-extra-warnings  enable more compiler warnings
335   --samples=PATH           location of test samples for FATE, if not set use
336                            \$LIBAV_SAMPLES at make invocation time.
337   --enable-neon-clobber-test check NEON registers for clobbering (should be
338                            used only for debugging purposes)
339   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
340                            should be used only for debugging purposes)
341   --enable-random          randomly enable/disable components
342   --disable-random
343   --enable-random=LIST     randomly enable/disable specific components or
344   --disable-random=LIST    component groups. LIST is a comma-separated list
345                            of NAME[:PROB] entries where NAME is a component
346                            (group) and PROB the probability associated with
347                            NAME (default 0.5).
348   --random-seed=VALUE      seed value for --enable/disable-random
349   --disable-valgrind-backtrace do not print a backtrace under Valgrind
350                            (only applies to --disable-optimizations builds)
351
352 NOTE: Object files are built at the place where configure is launched.
353 EOF
354   exit 0
355 }
356
357 quotes='""'
358
359 log(){
360     echo "$@" >> $logfile
361 }
362
363 log_file(){
364     log BEGIN $1
365     i=1
366     while read line; do
367         printf '%5s   %s\n' "${i}" "${line}"
368         i=$(($i+1))
369     done < $1 >> $logfile
370     log END $1
371 }
372
373 echolog(){
374     log "$@"
375     echo "$@"
376 }
377
378 warn(){
379     log "WARNING: $*"
380     WARNINGS="${WARNINGS}WARNING: $*\n"
381 }
382
383 die(){
384     echolog "$@"
385     cat <<EOF
386
387 If you think configure made a mistake, make sure you are using the latest
388 version from Git.  If the latest version fails, report the problem to the
389 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
390 EOF
391     if disabled logging; then
392         cat <<EOF
393 Rerun configure with logging enabled (do not use --disable-logging), and
394 include the log this produces with your report.
395 EOF
396     else
397         cat <<EOF
398 Include the log file "$logfile" produced by configure as this will help
399 solving the problem.
400 EOF
401     fi
402     exit 1
403 }
404
405 # Avoid locale weirdness, besides we really just want to translate ASCII.
406 toupper(){
407     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
408 }
409
410 tolower(){
411     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
412 }
413
414 c_escape(){
415     echo "$*" | sed 's/["\\]/\\\0/g'
416 }
417
418 sh_quote(){
419     v=$(echo "$1" | sed "s/'/'\\\\''/g")
420     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
421     echo "$v"
422 }
423
424 cleanws(){
425     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
426 }
427
428 filter(){
429     pat=$1
430     shift
431     for v; do
432         eval "case $v in $pat) printf '%s ' $v ;; esac"
433     done
434 }
435
436 filter_out(){
437     pat=$1
438     shift
439     for v; do
440         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
441     done
442 }
443
444 map(){
445     m=$1
446     shift
447     for v; do eval $m; done
448 }
449
450 add_suffix(){
451     suffix=$1
452     shift
453     for v; do echo ${v}${suffix}; done
454 }
455
456 set_all(){
457     value=$1
458     shift
459     for var in $*; do
460         eval $var=$value
461     done
462 }
463
464 set_weak(){
465     value=$1
466     shift
467     for var; do
468         eval : \${$var:=$value}
469     done
470 }
471
472 sanitize_var_name(){
473     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
474 }
475
476 set_safe(){
477     var=$1
478     shift
479     eval $(sanitize_var_name "$var")='$*'
480 }
481
482 get_safe(){
483     eval echo \$$(sanitize_var_name "$1")
484 }
485
486 pushvar(){
487     for pvar in $*; do
488         eval level=\${${pvar}_level:=0}
489         eval ${pvar}_${level}="\$$pvar"
490         eval ${pvar}_level=$(($level+1))
491     done
492 }
493
494 popvar(){
495     for pvar in $*; do
496         eval level=\${${pvar}_level:-0}
497         test $level = 0 && continue
498         eval level=$(($level-1))
499         eval $pvar="\${${pvar}_${level}}"
500         eval ${pvar}_level=$level
501         eval unset ${pvar}_${level}
502     done
503 }
504
505 enable(){
506     set_all yes $*
507 }
508
509 disable(){
510     set_all no $*
511 }
512
513 enable_weak(){
514     set_weak yes $*
515 }
516
517 disable_weak(){
518     set_weak no $*
519 }
520
521 enable_safe(){
522     for var; do
523         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
524     done
525 }
526
527 disable_safe(){
528     for var; do
529         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
530     done
531 }
532
533 do_enable_deep(){
534     for var; do
535         enabled $var && continue
536         eval sel="\$${var}_select"
537         eval sgs="\$${var}_suggest"
538         pushvar var sgs
539         enable_deep $sel
540         popvar sgs
541         enable_deep_weak $sgs
542         popvar var
543     done
544 }
545
546 enable_deep(){
547     do_enable_deep $*
548     enable $*
549 }
550
551 enable_deep_weak(){
552     for var; do
553         disabled $var && continue
554         pushvar var
555         do_enable_deep $var
556         popvar var
557         enable_weak $var
558     done
559 }
560
561 enabled(){
562     test "${1#!}" = "$1" && op== || op=!=
563     eval test "x\$${1#!}" $op "xyes"
564 }
565
566 disabled(){
567     test "${1#!}" = "$1" && op== || op=!=
568     eval test "x\$${1#!}" $op "xno"
569 }
570
571 enabled_all(){
572     for opt; do
573         enabled $opt || return 1
574     done
575 }
576
577 disabled_all(){
578     for opt; do
579         disabled $opt || return 1
580     done
581 }
582
583 enabled_any(){
584     for opt; do
585         enabled $opt && return 0
586     done
587 }
588
589 disabled_any(){
590     for opt; do
591         disabled $opt && return 0
592     done
593     return 1
594 }
595
596 set_default(){
597     for opt; do
598         eval : \${$opt:=\$${opt}_default}
599     done
600 }
601
602 is_in(){
603     value=$1
604     shift
605     for var in $*; do
606         [ $var = $value ] && return 0
607     done
608     return 1
609 }
610
611 do_check_deps(){
612     for cfg; do
613         cfg="${cfg#!}"
614         enabled ${cfg}_checking && die "Circular dependency for $cfg."
615         disabled ${cfg}_checking && continue
616         enable ${cfg}_checking
617         append allopts $cfg
618
619         eval dep_all="\$${cfg}_deps"
620         eval dep_any="\$${cfg}_deps_any"
621         eval dep_sel="\$${cfg}_select"
622         eval dep_sgs="\$${cfg}_suggest"
623         eval dep_ifa="\$${cfg}_if"
624         eval dep_ifn="\$${cfg}_if_any"
625
626         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
627         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
628         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
629
630         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
631         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
632         enabled_all  $dep_all || disable $cfg
633         enabled_any  $dep_any || disable $cfg
634         disabled_any $dep_sel && disable $cfg
635
636         if enabled $cfg; then
637             enable_deep $dep_sel
638             enable_deep_weak $dep_sgs
639         fi
640
641         disable ${cfg}_checking
642     done
643 }
644
645 check_deps(){
646     unset allopts
647
648     do_check_deps "$@"
649
650     for cfg in $allopts; do
651         enabled $cfg || continue
652         eval dep_extralibs="\$${cfg}_extralibs"
653         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
654     done
655 }
656
657 print_config(){
658     pfx=$1
659     files=$2
660     shift 2
661     map 'eval echo "$v \${$v:-no}"' "$@" |
662     awk "BEGIN { split(\"$files\", files) }
663         {
664             c = \"$pfx\" toupper(\$1);
665             v = \$2;
666             sub(/yes/, 1, v);
667             sub(/no/,  0, v);
668             for (f in files) {
669                 file = files[f];
670                 if (file ~ /\\.h\$/) {
671                     printf(\"#define %s %d\\n\", c, v) >>file;
672                 } else if (file ~ /\\.asm\$/) {
673                     printf(\"%%define %s %d\\n\", c, v) >>file;
674                 } else if (file ~ /\\.mak\$/) {
675                     n = -v ? \"\" : \"!\";
676                     printf(\"%s%s=yes\\n\", n, c) >>file;
677                 }
678             }
679         }"
680 }
681
682 print_enabled(){
683     suf=$1
684     shift
685     for v; do
686         enabled $v && printf "%s\n" ${v%$suf}
687     done
688 }
689
690 append(){
691     var=$1
692     shift
693     eval "$var=\"\$$var $*\""
694 }
695
696 prepend(){
697     var=$1
698     shift
699     eval "$var=\"$* \$$var\""
700 }
701
702 unique(){
703     var=$1
704     uniq_list=""
705     for tok in $(eval echo \$$var); do
706         uniq_list="$(filter_out $tok $uniq_list) $tok"
707     done
708     eval "$var=\"${uniq_list}\""
709 }
710
711 add_cppflags(){
712     append CPPFLAGS "$@"
713 }
714
715 add_cflags(){
716     append CFLAGS $($cflags_filter "$@")
717 }
718
719 add_cflags_headers(){
720     append CFLAGS_HEADERS $($cflags_filter "$@")
721 }
722
723 add_asflags(){
724     append ASFLAGS $($asflags_filter "$@")
725 }
726
727 add_objcflags(){
728     append OBJCFLAGS $($objcflags_filter "$@")
729 }
730
731 add_ldflags(){
732     append LDFLAGS $($ldflags_filter "$@")
733 }
734
735 add_ldexeflags(){
736     append LDEXEFLAGS $($ldflags_filter "$@")
737 }
738
739 add_stripflags(){
740     append STRIPFLAGS "$@"
741 }
742
743 add_extralibs(){
744     prepend extralibs $($ldflags_filter "$@")
745 }
746
747 add_host_cppflags(){
748     append host_cppflags "$@"
749 }
750
751 add_host_cflags(){
752     append host_cflags $($host_cflags_filter "$@")
753 }
754
755 add_host_ldflags(){
756     append host_ldflags $($host_ldflags_filter "$@")
757 }
758
759 add_compat(){
760     append compat_objs $1
761     shift
762     map 'add_cppflags -D$v' "$@"
763 }
764
765 check_cmd(){
766     log "$@"
767     "$@" >> $logfile 2>&1
768 }
769
770 cc_o(){
771     eval printf '%s\\n' $CC_O
772 }
773
774 cc_e(){
775     eval printf '%s\\n' $CC_E
776 }
777
778 check_cc(){
779     log check_cc "$@"
780     cat > $TMPC
781     log_file $TMPC
782     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
783 }
784
785 check_objcc(){
786     log check_objcc "$@"
787     cat > $TMPC
788     log_file $TMPC
789     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
790 }
791
792 check_cpp(){
793     log check_cpp "$@"
794     cat > $TMPC
795     log_file $TMPC
796     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
797 }
798
799 as_o(){
800     eval printf '%s\\n' $AS_O
801 }
802
803 check_as(){
804     log check_as "$@"
805     cat > $TMPS
806     log_file $TMPS
807     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
808 }
809
810 check_inline_asm(){
811     log check_inline_asm "$@"
812     name="$1"
813     code="$2"
814     shift 2
815     disable $name
816     check_cc "$@" <<EOF && enable $name
817 void foo(void){ __asm__ volatile($code); }
818 EOF
819 }
820
821 check_insn(){
822     log check_insn "$@"
823     check_inline_asm ${1}_inline "\"$2\""
824     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
825 }
826
827 check_yasm(){
828     log check_yasm "$@"
829     echo "$1" > $TMPS
830     log_file $TMPS
831     shift 1
832     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
833 }
834
835 ld_o(){
836     eval printf '%s\\n' $LD_O
837 }
838
839 check_ld(){
840     log check_ld "$@"
841     flags=$(filter_out '-l*' "$@")
842     libs=$(filter '-l*' "$@")
843     check_cc $($cflags_filter $flags) || return
844     flags=$($ldflags_filter $flags)
845     libs=$($ldflags_filter $libs)
846     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
847 }
848
849 print_include(){
850     hdr=$1
851     test "${hdr%.h}" = "${hdr}" &&
852         echo "#include $hdr"    ||
853         echo "#include <$hdr>"
854 }
855
856 check_code(){
857     log check_code "$@"
858     check=$1
859     headers=$2
860     code=$3
861     shift 3
862     {
863         for hdr in $headers; do
864             print_include $hdr
865         done
866         echo "int main(void) { $code; return 0; }"
867     } | check_$check "$@"
868 }
869
870 check_cppflags(){
871     log check_cppflags "$@"
872     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
873 int x;
874 EOF
875 }
876
877 test_cflags(){
878     log test_cflags "$@"
879     set -- $($cflags_filter "$@")
880     check_cc "$@" <<EOF
881 int x;
882 EOF
883 }
884
885 check_cflags(){
886     log check_cflags "$@"
887     test_cflags "$@" && add_cflags "$@"
888 }
889
890 test_objcflags(){
891     log test_objcflags "$@"
892     set -- $($objcflags_filter "$@")
893     check_objcc "$@" <<EOF
894 int x;
895 EOF
896 }
897
898 check_objcflags(){
899     log check_objcflags "$@"
900     test_objcflags "$@" && add_objcflags "$@"
901 }
902
903 test_ldflags(){
904     log test_ldflags "$@"
905     check_ld "$@" <<EOF
906 int main(void){ return 0; }
907 EOF
908 }
909
910 check_ldflags(){
911     log check_ldflags "$@"
912     test_ldflags "$@" && add_ldflags "$@"
913 }
914
915 test_stripflags(){
916     log test_stripflags "$@"
917     # call check_cc to get a fresh TMPO
918     check_cc <<EOF
919 int main(void) { return 0; }
920 EOF
921     check_cmd $strip $STRIPFLAGS "$@" $TMPO
922 }
923
924 check_stripflags(){
925     log check_stripflags "$@"
926     test_stripflags "$@" && add_stripflags "$@"
927 }
928
929 check_header(){
930     log check_header "$@"
931     header=$1
932     shift
933     disable_safe $header
934     check_cpp "$@" <<EOF && enable_safe $header
935 #include <$header>
936 int x;
937 EOF
938 }
939
940 check_func(){
941     log check_func "$@"
942     func=$1
943     shift
944     disable $func
945     check_ld "$@" <<EOF && enable $func
946 extern int $func();
947 int main(void){ $func(); }
948 EOF
949 }
950
951 check_mathfunc(){
952     log check_mathfunc "$@"
953     func=$1
954     narg=$2
955     shift 2
956     test $narg = 2 && args="f, g" || args="f"
957     disable $func
958     check_ld "$@" <<EOF && enable $func
959 #include <math.h>
960 float foo(float f, float g) { return $func($args); }
961 int main(void){ return 0; }
962 EOF
963 }
964
965 check_func_headers(){
966     log check_func_headers "$@"
967     headers=$1
968     funcs=$2
969     shift 2
970     {
971         for hdr in $headers; do
972             print_include $hdr
973         done
974         for func in $funcs; do
975             echo "long check_$func(void) { return (long) $func; }"
976         done
977         echo "int main(void) { return 0; }"
978     } | check_ld "$@" && enable $funcs && enable_safe $headers
979 }
980
981 check_cpp_condition(){
982     log check_cpp_condition "$@"
983     header=$1
984     condition=$2
985     shift 2
986     check_cpp "$@" <<EOF
987 #include <$header>
988 #if !($condition)
989 #error "unsatisfied condition: $condition"
990 #endif
991 EOF
992 }
993
994 test_cflags_cpp(){
995     log test_cflags_cpp "$@"
996     flags=$1
997     condition=$2
998     shift 2
999     set -- $($cflags_filter "$flags")
1000     check_cpp "$@" <<EOF
1001 #if !($condition)
1002 #error "unsatisfied condition: $condition"
1003 #endif
1004 EOF
1005 }
1006
1007 check_lib(){
1008     log check_lib "$@"
1009     headers="$1"
1010     funcs="$2"
1011     shift 2
1012     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1013 }
1014
1015 check_pkg_config(){
1016     log check_pkg_config "$@"
1017     pkg_version="$1"
1018     pkg="${1%% *}"
1019     headers="$2"
1020     funcs="$3"
1021     shift 3
1022     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1023     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1024     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1025     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1026         set_safe "${pkg}_cflags"    $pkg_cflags &&
1027         set_safe "${pkg}_extralibs" $pkg_libs
1028 }
1029
1030 check_exec(){
1031     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1032 }
1033
1034 check_exec_crash(){
1035     log check_exec_crash "$@"
1036     code=$(cat)
1037
1038     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1039     # are safe but may not be available everywhere.  Thus we use
1040     # raise(SIGTERM) instead.  The check is run in a subshell so we
1041     # can redirect the "Terminated" message from the shell.  SIGBUS
1042     # is not defined by standard C so it is used conditionally.
1043
1044     (check_exec "$@") >> $logfile 2>&1 <<EOF
1045 #include <signal.h>
1046 static void sighandler(int sig){
1047     raise(SIGTERM);
1048 }
1049 int foo(void){
1050     $code
1051 }
1052 int (*func_ptr)(void) = foo;
1053 int main(void){
1054     signal(SIGILL, sighandler);
1055     signal(SIGFPE, sighandler);
1056     signal(SIGSEGV, sighandler);
1057 #ifdef SIGBUS
1058     signal(SIGBUS, sighandler);
1059 #endif
1060     return func_ptr();
1061 }
1062 EOF
1063 }
1064
1065 check_type(){
1066     log check_type "$@"
1067     headers=$1
1068     type=$2
1069     shift 2
1070     disable_safe "$type"
1071     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1072 }
1073
1074 check_struct(){
1075     log check_struct "$@"
1076     headers=$1
1077     struct=$2
1078     member=$3
1079     shift 3
1080     disable_safe "${struct}_${member}"
1081     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1082         enable_safe "${struct}_${member}"
1083 }
1084
1085 check_builtin(){
1086     log check_builtin "$@"
1087     name=$1
1088     headers=$2
1089     builtin=$3
1090     shift 3
1091     disable "$name"
1092     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1093 }
1094
1095 check_compile_assert(){
1096     log check_compile_assert "$@"
1097     name=$1
1098     headers=$2
1099     condition=$3
1100     shift 3
1101     disable "$name"
1102     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1103 }
1104
1105 require(){
1106     log require "$@"
1107     name_version="$1"
1108     headers="$2"
1109     func="$3"
1110     shift 3
1111     check_lib "$headers" $func "$@" || die "ERROR: $name_version not found"
1112 }
1113
1114 require_pkg_config(){
1115     log require_pkg_config "$@"
1116     pkg_version="$1"
1117     pkg="${1%% *}"
1118     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1119     add_cflags    $(get_safe "${pkg}_cflags")
1120     add_extralibs $(get_safe "${pkg}_extralibs")
1121 }
1122
1123 hostcc_e(){
1124     eval printf '%s\\n' $HOSTCC_E
1125 }
1126
1127 hostcc_o(){
1128     eval printf '%s\\n' $HOSTCC_O
1129 }
1130
1131 check_host_cc(){
1132     log check_host_cc "$@"
1133     cat > $TMPC
1134     log_file $TMPC
1135     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1136 }
1137
1138 check_host_cpp(){
1139     log check_host_cpp "$@"
1140     cat > $TMPC
1141     log_file $TMPC
1142     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1143 }
1144
1145 check_host_cppflags(){
1146     log check_host_cppflags "$@"
1147     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1148 int x;
1149 EOF
1150 }
1151
1152 check_host_cflags(){
1153     log check_host_cflags "$@"
1154     set -- $($host_cflags_filter "$@")
1155     check_host_cc "$@" <<EOF && append host_cflags "$@"
1156 int x;
1157 EOF
1158 }
1159
1160 check_host_cpp_condition(){
1161     log check_host_cpp_condition "$@"
1162     header=$1
1163     condition=$2
1164     shift 2
1165     check_host_cpp "$@" <<EOF
1166 #include <$header>
1167 #if !($condition)
1168 #error "unsatisfied condition: $condition"
1169 #endif
1170 EOF
1171 }
1172
1173 apply(){
1174     file=$1
1175     shift
1176     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1177 }
1178
1179 cp_if_changed(){
1180     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1181     mkdir -p "$(dirname $2)"
1182     cp -f "$1" "$2"
1183 }
1184
1185 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1186 # system-dependent things.
1187
1188 AVCODEC_COMPONENTS="
1189     bsfs
1190     decoders
1191     encoders
1192     hwaccels
1193     parsers
1194 "
1195
1196 AVDEVICE_COMPONENTS="
1197     indevs
1198     outdevs
1199 "
1200 AVFILTER_COMPONENTS="
1201     filters
1202 "
1203 AVFORMAT_COMPONENTS="
1204     demuxers
1205     muxers
1206     protocols
1207 "
1208
1209 AVRESAMPLE_COMPONENTS=""
1210 AVUTIL_COMPONENTS=""
1211
1212 COMPONENT_LIST="
1213     $AVCODEC_COMPONENTS
1214     $AVDEVICE_COMPONENTS
1215     $AVFILTER_COMPONENTS
1216     $AVFORMAT_COMPONENTS
1217     $AVRESAMPLE_COMPONENTS
1218     $AVUTIL_COMPONENTS
1219 "
1220
1221 EXAMPLE_LIST="
1222     decode_audio_example
1223     decode_video_example
1224     encode_audio_example
1225     encode_video_example
1226     filter_audio_example
1227     metadata_example
1228     output_example
1229     qsvdec_example
1230     transcode_aac_example
1231 "
1232
1233 HWACCEL_LIBRARY_NONFREE_LIST="
1234     cuda
1235     libnpp
1236 "
1237 HWACCEL_LIBRARY_LIST="
1238     $HWACCEL_LIBRARY_NONFREE_LIST
1239     d3d11va
1240     dxva2
1241     libmfx
1242     mmal
1243     nvenc
1244     omx
1245     vaapi
1246     vda
1247     vdpau
1248 "
1249
1250 EXTERNAL_LIBRARY_GPL_LIST="
1251     libcdio
1252     libx264
1253     libx265
1254     libxavs
1255     libxvid
1256 "
1257
1258 EXTERNAL_LIBRARY_NONFREE_LIST="
1259     libfaac
1260     libfdk_aac
1261     openssl
1262 "
1263
1264 EXTERNAL_LIBRARY_VERSION3_LIST="
1265     libopencore_amrnb
1266     libopencore_amrwb
1267     libvo_aacenc
1268     libvo_amrwbenc
1269 "
1270
1271 EXTERNAL_LIBRARY_LIST="
1272     $EXTERNAL_LIBRARY_GPL_LIST
1273     $EXTERNAL_LIBRARY_NONFREE_LIST
1274     $EXTERNAL_LIBRARY_VERSION3_LIST
1275     avisynth
1276     avxsynth
1277     bzlib
1278     frei0r
1279     gnutls
1280     libbs2b
1281     libdc1394
1282     libdcadec
1283     libfontconfig
1284     libfreetype
1285     libgsm
1286     libhdcd
1287     libilbc
1288     libkvazaar
1289     libmp3lame
1290     libopencv
1291     libopenh264
1292     libopenjpeg
1293     libopus
1294     libpulse
1295     librtmp
1296     libschroedinger
1297     libsnappy
1298     libspeex
1299     libtheora
1300     libtwolame
1301     libvorbis
1302     libvpx
1303     libwavpack
1304     libwebp
1305     libxcb
1306     libxcb_shm
1307     libxcb_xfixes
1308     zlib
1309 "
1310
1311 FEATURE_LIST="
1312     gray
1313     hardcoded_tables
1314     omx_rpi
1315     runtime_cpudetect
1316     safe_bitstream_reader
1317     shared
1318     small
1319     sram
1320     static
1321     swscale_alpha
1322 "
1323
1324 LIBRARY_LIST="
1325     avcodec
1326     avdevice
1327     avfilter
1328     avformat
1329     avresample
1330     avutil
1331     swscale
1332 "
1333
1334 LICENSE_LIST="
1335     gpl
1336     nonfree
1337     version3
1338 "
1339
1340 PROGRAM_LIST="
1341     avconv
1342     avplay
1343     avprobe
1344 "
1345
1346 SUBSYSTEM_LIST="
1347     dct
1348     doc
1349     error_resilience
1350     faan
1351     fft
1352     lsp
1353     lzo
1354     mdct
1355     network
1356     rdft
1357 "
1358
1359 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1360 CONFIG_LIST="
1361     $EXAMPLE_LIST
1362     $EXTERNAL_LIBRARY_LIST
1363     $HWACCEL_LIBRARY_LIST
1364     $FEATURE_LIST
1365     $LICENSE_LIST
1366     $LIBRARY_LIST
1367     $PROGRAM_LIST
1368     $SUBSYSTEM_LIST
1369     neon_clobber_test
1370     pic
1371     pod2man
1372     texi2html
1373     thumb
1374     valgrind_backtrace
1375     xmm_clobber_test
1376     $COMPONENT_LIST
1377 "
1378
1379 THREADS_LIST="
1380     pthreads
1381     w32threads
1382 "
1383
1384 ATOMICS_LIST="
1385     atomics_gcc
1386     atomics_suncc
1387     atomics_win32
1388 "
1389
1390 ARCH_LIST="
1391     aarch64
1392     alpha
1393     arm
1394     avr32
1395     avr32_ap
1396     avr32_uc
1397     bfin
1398     ia64
1399     m68k
1400     mips
1401     mips64
1402     parisc
1403     ppc
1404     ppc64
1405     s390
1406     sh4
1407     sparc
1408     sparc64
1409     tilegx
1410     tilepro
1411     tomi
1412     x86
1413     x86_32
1414     x86_64
1415 "
1416
1417 ARCH_EXT_LIST_ARM="
1418     armv5te
1419     armv6
1420     armv6t2
1421     armv8
1422     neon
1423     vfp
1424     vfpv3
1425 "
1426
1427 ARCH_EXT_LIST_X86_SIMD="
1428     amd3dnow
1429     amd3dnowext
1430     avx
1431     avx2
1432     fma3
1433     fma4
1434     mmx
1435     mmxext
1436     sse
1437     sse2
1438     sse3
1439     sse4
1440     sse42
1441     ssse3
1442     xop
1443 "
1444
1445 ARCH_EXT_LIST_PPC="
1446     altivec
1447     dcbzl
1448     ldbrx
1449     power8
1450     ppc4xx
1451     vsx
1452 "
1453
1454 ARCH_EXT_LIST_X86="
1455     $ARCH_EXT_LIST_X86_SIMD
1456     cpunop
1457     i686
1458 "
1459
1460 ARCH_EXT_LIST_MIPS="
1461     loongson
1462     mips32r1
1463     mips64r1
1464     mips32r2
1465     mips64r2
1466     mips32r6
1467     mips64r6
1468 "
1469
1470 ARCH_EXT_LIST="
1471     $ARCH_EXT_LIST_ARM
1472     $ARCH_EXT_LIST_MIPS
1473     $ARCH_EXT_LIST_PPC
1474     $ARCH_EXT_LIST_X86
1475     vis
1476 "
1477
1478 ARCH_FEATURES="
1479     aligned_stack
1480     fast_64bit
1481     fast_clz
1482     fast_cmov
1483     local_aligned_8
1484     local_aligned_16
1485     local_aligned_32
1486     simd_align_16
1487     simd_align_32
1488 "
1489
1490 BUILTIN_LIST="
1491     atomic_cas_ptr
1492     machine_rw_barrier
1493     MemoryBarrier
1494     mm_empty
1495     rdtsc
1496     sem_timedwait
1497     sync_val_compare_and_swap
1498 "
1499 HAVE_LIST_CMDLINE="
1500     inline_asm
1501     symver
1502     yasm
1503 "
1504
1505 HAVE_LIST_PUB="
1506     bigendian
1507     fast_unaligned
1508 "
1509
1510 HEADERS_LIST="
1511     AVFoundation_AVFoundation_h
1512     alsa_asoundlib_h
1513     altivec_h
1514     arpa_inet_h
1515     cdio_paranoia_h
1516     cdio_paranoia_paranoia_h
1517     dispatch_dispatch_h
1518     dev_bktr_ioctl_bt848_h
1519     dev_bktr_ioctl_meteor_h
1520     dev_ic_bt8xx_h
1521     dev_video_bktr_ioctl_bt848_h
1522     dev_video_meteor_ioctl_meteor_h
1523     direct_h
1524     dlfcn_h
1525     d3d11_h
1526     dxva_h
1527     gsm_h
1528     io_h
1529     mach_mach_time_h
1530     machine_ioctl_bt848_h
1531     machine_ioctl_meteor_h
1532     malloc_h
1533     poll_h
1534     sndio_h
1535     soundcard_h
1536     stdatomic_h
1537     sys_mman_h
1538     sys_param_h
1539     sys_resource_h
1540     sys_select_h
1541     sys_soundcard_h
1542     sys_time_h
1543     sys_un_h
1544     sys_videoio_h
1545     unistd_h
1546     valgrind_valgrind_h
1547     windows_h
1548     winsock2_h
1549 "
1550
1551 INTRINSICS_LIST="
1552     intrinsics_neon
1553 "
1554
1555 MATH_FUNCS="
1556     atanf
1557     atan2f
1558     cbrtf
1559     cosf
1560     exp2
1561     exp2f
1562     expf
1563     isinf
1564     isnan
1565     ldexpf
1566     llrint
1567     llrintf
1568     log2
1569     log2f
1570     log10f
1571     lrint
1572     lrintf
1573     powf
1574     rint
1575     round
1576     roundf
1577     sinf
1578     trunc
1579     truncf
1580 "
1581
1582 SYSTEM_FUNCS="
1583     aligned_malloc
1584     clock_gettime
1585     closesocket
1586     CommandLineToArgvW
1587     CoTaskMemFree
1588     CryptGenRandom
1589     dlopen
1590     fcntl
1591     flt_lim
1592     fork
1593     getaddrinfo
1594     gethrtime
1595     getopt
1596     GetProcessAffinityMask
1597     GetProcessMemoryInfo
1598     GetProcessTimes
1599     getrusage
1600     GetSystemTimeAsFileTime
1601     gettimeofday
1602     gmtime_r
1603     inet_aton
1604     isatty
1605     jack_port_get_latency_range
1606     LoadLibrary
1607     localtime_r
1608     mach_absolute_time
1609     MapViewOfFile
1610     memalign
1611     mkstemp
1612     mmap
1613     mprotect
1614     nanosleep
1615     posix_memalign
1616     sched_getaffinity
1617     SetConsoleTextAttribute
1618     setmode
1619     setrlimit
1620     Sleep
1621     strerror_r
1622     sysconf
1623     sysctl
1624     usleep
1625     VirtualAlloc
1626 "
1627
1628 TOOLCHAIN_FEATURES="
1629     as_dn_directive
1630     as_fpu_directive
1631     as_func
1632     as_object_arch
1633     asm_mod_q
1634     attribute_may_alias
1635     attribute_packed
1636     ebp_available
1637     ebx_available
1638     gnu_as
1639     ibm_asm
1640     inline_asm_labels
1641     pragma_deprecated
1642     symver_asm_label
1643     symver_gnu_asm
1644     vfp_args
1645     xform_asm
1646     xmm_clobbers
1647 "
1648
1649 TYPES_LIST="
1650     CONDITION_VARIABLE_Ptr
1651     socklen_t
1652     struct_addrinfo
1653     struct_group_source_req
1654     struct_ip_mreq_source
1655     struct_ipv6_mreq
1656     struct_pollfd
1657     struct_rusage_ru_maxrss
1658     struct_sockaddr_in6
1659     struct_sockaddr_sa_len
1660     struct_sockaddr_storage
1661     struct_v4l2_frmivalenum_discrete
1662 "
1663
1664 HAVE_LIST="
1665     $ARCH_EXT_LIST
1666     $(add_suffix _external $ARCH_EXT_LIST)
1667     $(add_suffix _inline   $ARCH_EXT_LIST)
1668     $ARCH_FEATURES
1669     $BUILTIN_LIST
1670     $HAVE_LIST_CMDLINE
1671     $HAVE_LIST_PUB
1672     $HEADERS_LIST
1673     $INTRINSICS_LIST
1674     $MATH_FUNCS
1675     $SYSTEM_FUNCS
1676     $THREADS_LIST
1677     $TOOLCHAIN_FEATURES
1678     $TYPES_LIST
1679     dos_paths
1680     dxva2_lib
1681     libc_msvcrt
1682     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1683     sdl
1684     section_data_rel_ro
1685     threads
1686     vaapi_drm
1687     vaapi_x11
1688     vdpau_x11
1689 "
1690
1691 # options emitted with CONFIG_ prefix but not available on the command line
1692 CONFIG_EXTRA="
1693     aandcttables
1694     ac3dsp
1695     audio_frame_queue
1696     audiodsp
1697     blockdsp
1698     bswapdsp
1699     cabac
1700     dirac_parse
1701     dvprofile
1702     faandct
1703     faanidct
1704     fdctdsp
1705     flacdsp
1706     fmtconvert
1707     g722dsp
1708     gmp
1709     golomb
1710     gplv3
1711     h263dsp
1712     h264chroma
1713     h264dsp
1714     h264parse
1715     h264pred
1716     h264qpel
1717     hevc_ps
1718     hpeldsp
1719     huffman
1720     huffyuvdsp
1721     huffyuvencdsp
1722     idctdsp
1723     iirfilter
1724     imdct15
1725     intrax8
1726     iso_media
1727     ividsp
1728     jpegtables
1729     libx262
1730     lgplv3
1731     lpc
1732     lzf
1733     me_cmp
1734     mpeg_er
1735     mpegaudio
1736     mpegaudiodsp
1737     mpegaudioheader
1738     mpegvideo
1739     mpegvideoenc
1740     mss34dsp
1741     pixblockdsp
1742     qpeldsp
1743     qsv
1744     qsvdec
1745     qsvenc
1746     rangecoder
1747     riffdec
1748     riffenc
1749     rtpdec
1750     rtpenc_chain
1751     rv34dsp
1752     sinewin
1753     snappy
1754     srtp
1755     startcode
1756     texturedsp
1757     texturedspenc
1758     tpeldsp
1759     vaapi_encode
1760     vc1dsp
1761     videodsp
1762     vp3dsp
1763     vp56dsp
1764     vp8dsp
1765     wma_freqs
1766     wmv2dsp
1767 "
1768
1769 CMDLINE_SELECT="
1770     $ARCH_EXT_LIST
1771     $CONFIG_LIST
1772     $HAVE_LIST_CMDLINE
1773     $THREADS_LIST
1774     asm
1775     cross_compile
1776     debug
1777     extra_warnings
1778     logging
1779     lto
1780     optimizations
1781     rpath
1782 "
1783
1784 PATHS_LIST="
1785     bindir
1786     datadir
1787     docdir
1788     incdir
1789     libdir
1790     mandir
1791     prefix
1792     shlibdir
1793 "
1794
1795 CMDLINE_SET="
1796     $PATHS_LIST
1797     ar
1798     arch
1799     as
1800     cc
1801     objcc
1802     cpu
1803     cross_prefix
1804     custom_allocator
1805     dep_cc
1806     env
1807     extra_version
1808     host_cc
1809     host_cflags
1810     host_extralibs
1811     host_ld
1812     host_ldflags
1813     host_os
1814     ld
1815     logfile
1816     malloc_prefix
1817     nm
1818     optflags
1819     pkg_config
1820     pkg_config_flags
1821     random_seed
1822     samples
1823     sysinclude
1824     sysroot
1825     target_exec
1826     target_os
1827     target_path
1828     target_samples
1829     toolchain
1830 "
1831
1832 CMDLINE_APPEND="
1833     extra_cflags
1834     extra_objcflags
1835     host_cppflags
1836 "
1837
1838 # code dependency declarations
1839
1840 # architecture extensions
1841
1842 armv5te_deps="arm"
1843 armv6_deps="arm"
1844 armv6t2_deps="arm"
1845 armv8_deps="aarch64"
1846 neon_deps_any="aarch64 arm"
1847 intrinsics_neon_deps="neon"
1848 vfp_deps_any="aarch64 arm"
1849 vfpv3_deps="vfp"
1850
1851 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1852
1853 altivec_deps="ppc"
1854 ppc4xx_deps="ppc"
1855 vsx_deps="altivec"
1856 power8_deps="vsx"
1857
1858 cpunop_deps="i686"
1859 x86_64_select="i686"
1860 x86_64_suggest="fast_cmov"
1861
1862 amd3dnow_deps="mmx"
1863 amd3dnowext_deps="amd3dnow"
1864 i686_deps="x86"
1865 mmx_deps="x86"
1866 mmxext_deps="mmx"
1867 sse_deps="mmxext"
1868 sse2_deps="sse"
1869 sse3_deps="sse2"
1870 ssse3_deps="sse3"
1871 sse4_deps="ssse3"
1872 sse42_deps="sse4"
1873 avx_deps="sse42"
1874 xop_deps="avx"
1875 fma3_deps="avx"
1876 fma4_deps="avx"
1877 avx2_deps="avx"
1878
1879 mmx_external_deps="yasm"
1880 mmx_inline_deps="inline_asm"
1881 mmx_suggest="mmx_external mmx_inline"
1882
1883 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1884     eval dep=\$${ext}_deps
1885     eval ${ext}_external_deps='"${dep}_external"'
1886     eval ${ext}_inline_deps='"${dep}_inline"'
1887     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1888 done
1889
1890 aligned_stack_if_any="aarch64 ppc x86"
1891 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1892 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1893 fast_unaligned_if_any="aarch64 ppc x86"
1894 simd_align_16_if_any="altivec neon sse"
1895 simd_align_32_if_any="avx"
1896
1897 # system capabilities
1898 symver_if_any="symver_asm_label symver_gnu_asm"
1899 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1900
1901 # threading support
1902 atomics_gcc_if="sync_val_compare_and_swap"
1903 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1904 atomics_win32_if="MemoryBarrier"
1905 atomics_native_if_any="$ATOMICS_LIST"
1906 w32threads_deps="atomics_native"
1907 threads_if_any="$THREADS_LIST"
1908
1909 # subsystems
1910 dct_select="rdft"
1911 dirac_parse_select="golomb"
1912 error_resilience_select="me_cmp"
1913 faandct_deps="faan fdctdsp"
1914 faanidct_deps="faan idctdsp"
1915 h264dsp_select="startcode"
1916 hevc_ps_select="golomb"
1917 intrax8_select="blockdsp idctdsp"
1918 mdct_select="fft"
1919 rdft_select="fft"
1920 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1921 mpeg_er_select="error_resilience"
1922 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1923 mpegaudiodsp_select="dct"
1924 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1925 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1926 vc1dsp_select="h264chroma qpeldsp startcode"
1927
1928 # decoders / encoders
1929 aac_decoder_select="imdct15 mdct sinewin"
1930 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1931 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1932 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1933 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1934 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1935 adpcm_g722_decoder_select="g722dsp"
1936 adpcm_g722_encoder_select="g722dsp"
1937 aic_decoder_select="golomb idctdsp"
1938 alac_encoder_select="lpc"
1939 als_decoder_select="bswapdsp"
1940 amrnb_decoder_select="lsp"
1941 amrwb_decoder_select="lsp"
1942 amv_decoder_select="sp5x_decoder"
1943 ape_decoder_select="bswapdsp"
1944 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1945 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1946 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1947 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1948 atrac1_decoder_select="mdct sinewin"
1949 atrac3_decoder_select="mdct"
1950 atrac3p_decoder_select="mdct sinewin"
1951 bink_decoder_select="blockdsp hpeldsp"
1952 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1953 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1954 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1955 cllc_decoder_select="bswapdsp"
1956 comfortnoise_encoder_select="lpc"
1957 cook_decoder_select="audiodsp mdct sinewin"
1958 cscd_decoder_select="lzo"
1959 cscd_decoder_suggest="zlib"
1960 dca_decoder_select="fmtconvert mdct"
1961 dds_decoder_select="texturedsp"
1962 dnxhd_decoder_select="blockdsp idctdsp"
1963 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1964 dvvideo_decoder_select="dvprofile idctdsp"
1965 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1966 dxa_decoder_deps="zlib"
1967 dxv_decoder_select="lzf texturedsp"
1968 eac3_decoder_select="ac3_decoder"
1969 eac3_encoder_select="ac3_encoder"
1970 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1971 eatgq_decoder_select="aandcttables idctdsp"
1972 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1973 exr_decoder_deps="zlib"
1974 ffv1_decoder_select="rangecoder"
1975 ffv1_encoder_select="rangecoder"
1976 ffvhuff_decoder_select="huffyuv_decoder"
1977 ffvhuff_encoder_select="huffyuv_encoder"
1978 fic_decoder_select="golomb"
1979 flac_decoder_select="flacdsp"
1980 flac_encoder_select="bswapdsp flacdsp lpc"
1981 flashsv_decoder_deps="zlib"
1982 flashsv_encoder_deps="zlib"
1983 flashsv2_decoder_deps="zlib"
1984 flv_decoder_select="h263_decoder"
1985 flv_encoder_select="h263_encoder"
1986 fourxm_decoder_select="blockdsp bswapdsp"
1987 fraps_decoder_select="bswapdsp huffman"
1988 g2m_decoder_deps="zlib"
1989 g2m_decoder_select="blockdsp idctdsp jpegtables"
1990 h261_decoder_select="mpeg_er mpegvideo"
1991 h261_encoder_select="aandcttables mpegvideoenc"
1992 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1993 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1994 h263i_decoder_select="h263_decoder"
1995 h263p_encoder_select="h263_encoder"
1996 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
1997 h264_decoder_suggest="error_resilience"
1998 hap_decoder_select="snappy texturedsp"
1999 hap_encoder_deps="libsnappy"
2000 hap_encoder_select="texturedspenc"
2001 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2002 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2003 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2004 iac_decoder_select="imc_decoder"
2005 imc_decoder_select="bswapdsp fft mdct sinewin"
2006 indeo3_decoder_select="hpeldsp"
2007 indeo4_decoder_select="ividsp"
2008 indeo5_decoder_select="ividsp"
2009 interplay_video_decoder_select="hpeldsp"
2010 jpegls_decoder_select="mjpeg_decoder"
2011 jv_decoder_select="blockdsp"
2012 lagarith_decoder_select="huffyuvdsp"
2013 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2014 magicyuv_decoder_select="huffyuvdsp"
2015 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2016 metasound_decoder_select="lsp mdct sinewin"
2017 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2018 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2019 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2020 mjpegb_decoder_select="mjpeg_decoder"
2021 mlp_decoder_select="mlp_parser"
2022 motionpixels_decoder_select="bswapdsp"
2023 mp1_decoder_select="mpegaudio"
2024 mp1float_decoder_select="mpegaudio"
2025 mp2_decoder_select="mpegaudio"
2026 mp2float_decoder_select="mpegaudio"
2027 mp3_decoder_select="mpegaudio"
2028 mp3adu_decoder_select="mpegaudio"
2029 mp3adufloat_decoder_select="mpegaudio"
2030 mp3float_decoder_select="mpegaudio"
2031 mp3on4_decoder_select="mpegaudio"
2032 mp3on4float_decoder_select="mpegaudio"
2033 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2034 mpc8_decoder_select="mpegaudiodsp"
2035 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2036 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2037 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2038 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2039 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2040 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2041 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2042 mpeg4_encoder_select="h263_encoder"
2043 msa1_decoder_select="mss34dsp"
2044 msmpeg4v1_decoder_select="h263_decoder"
2045 msmpeg4v2_decoder_select="h263_decoder"
2046 msmpeg4v2_encoder_select="h263_encoder"
2047 msmpeg4v3_decoder_select="h263_decoder"
2048 msmpeg4v3_encoder_select="h263_encoder"
2049 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2050 mts2_decoder_select="mss34dsp"
2051 mxpeg_decoder_select="mjpeg_decoder"
2052 nellymoser_decoder_select="mdct sinewin"
2053 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2054 nuv_decoder_select="idctdsp lzo"
2055 on2avc_decoder_select="mdct"
2056 opus_decoder_deps="avresample"
2057 opus_decoder_select="imdct15"
2058 png_decoder_deps="zlib"
2059 png_encoder_deps="zlib"
2060 png_encoder_select="huffyuvencdsp"
2061 prores_decoder_select="idctdsp"
2062 prores_encoder_select="fdctdsp"
2063 qcelp_decoder_select="lsp"
2064 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2065 ra_144_encoder_select="audio_frame_queue lpc"
2066 ralf_decoder_select="golomb"
2067 rscc_decoder_deps="zlib"
2068 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2069 rv10_encoder_select="h263_encoder"
2070 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2071 rv20_encoder_select="h263_encoder"
2072 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2073 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2074 screenpresso_decoder_deps="zlib"
2075 sipr_decoder_select="lsp"
2076 sp5x_decoder_select="mjpeg_decoder"
2077 svq1_decoder_select="hpeldsp"
2078 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2079 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2080 svq3_decoder_suggest="zlib"
2081 tak_decoder_select="audiodsp"
2082 tdsc_decoder_deps="zlib"
2083 tdsc_decoder_select="mjpeg_decoder"
2084 theora_decoder_select="vp3_decoder"
2085 thp_decoder_select="mjpeg_decoder"
2086 tiff_decoder_suggest="zlib"
2087 tiff_encoder_suggest="zlib"
2088 truehd_decoder_select="mlp_decoder"
2089 truemotion2_decoder_select="bswapdsp"
2090 truespeech_decoder_select="bswapdsp"
2091 tscc_decoder_deps="zlib"
2092 txd_decoder_select="texturedsp"
2093 twinvq_decoder_select="mdct lsp sinewin"
2094 utvideo_decoder_select="bswapdsp"
2095 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2096 vble_decoder_select="huffyuvdsp"
2097 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2098 vc1image_decoder_select="vc1_decoder"
2099 vorbis_decoder_select="mdct"
2100 vorbis_encoder_select="mdct"
2101 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2102 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2103 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2104 vp6a_decoder_select="vp6_decoder"
2105 vp6f_decoder_select="vp6_decoder"
2106 vp7_decoder_select="h264pred videodsp vp8dsp"
2107 vp8_decoder_select="h264pred videodsp vp8dsp"
2108 vp9_decoder_select="videodsp"
2109 webp_decoder_select="vp8_decoder"
2110 wmapro_decoder_select="mdct sinewin wma_freqs"
2111 wmav1_decoder_select="mdct sinewin wma_freqs"
2112 wmav1_encoder_select="mdct sinewin wma_freqs"
2113 wmav2_decoder_select="mdct sinewin wma_freqs"
2114 wmav2_encoder_select="mdct sinewin wma_freqs"
2115 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2116 wmv1_decoder_select="h263_decoder"
2117 wmv1_encoder_select="h263_encoder"
2118 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2119 wmv2_encoder_select="h263_encoder wmv2dsp"
2120 wmv3_decoder_select="vc1_decoder"
2121 wmv3image_decoder_select="wmv3_decoder"
2122 zerocodec_decoder_deps="zlib"
2123 zlib_decoder_deps="zlib"
2124 zlib_encoder_deps="zlib"
2125 zmbv_decoder_deps="zlib"
2126 zmbv_encoder_deps="zlib"
2127
2128 # hardware accelerators
2129 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2130 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2131 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2132 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2133
2134 h263_vaapi_hwaccel_deps="vaapi"
2135 h263_vaapi_hwaccel_select="h263_decoder"
2136 h264_d3d11va_hwaccel_deps="d3d11va"
2137 h264_d3d11va_hwaccel_select="h264_decoder"
2138 h264_dxva2_hwaccel_deps="dxva2"
2139 h264_dxva2_hwaccel_select="h264_decoder"
2140 h264_mmal_hwaccel_deps="mmal"
2141 h264_qsv_hwaccel_deps="libmfx"
2142 h264_vaapi_hwaccel_deps="vaapi"
2143 h264_vaapi_hwaccel_select="h264_decoder"
2144 h264_vda_hwaccel_deps="vda"
2145 h264_vda_hwaccel_select="h264_decoder"
2146 h264_vda_old_hwaccel_deps="vda"
2147 h264_vda_old_hwaccel_select="h264_decoder"
2148 h264_vdpau_hwaccel_deps="vdpau"
2149 h264_vdpau_hwaccel_select="h264_decoder"
2150 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2151 hevc_d3d11va_hwaccel_select="hevc_decoder"
2152 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2153 hevc_dxva2_hwaccel_select="hevc_decoder"
2154 hevc_qsv_hwaccel_deps="libmfx"
2155 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2156 hevc_vdpau_hwaccel_select="hevc_decoder"
2157 mpeg1_vdpau_hwaccel_deps="vdpau"
2158 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2159 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2160 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2161 mpeg2_dxva2_hwaccel_deps="dxva2"
2162 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2163 mpeg2_mmal_hwaccel_deps="mmal"
2164 mpeg2_qsv_hwaccel_deps="libmfx"
2165 mpeg2_vaapi_hwaccel_deps="vaapi"
2166 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2167 mpeg2_vdpau_hwaccel_deps="vdpau"
2168 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2169 mpeg4_vaapi_hwaccel_deps="vaapi"
2170 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2171 mpeg4_vdpau_hwaccel_deps="vdpau"
2172 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2173 vc1_d3d11va_hwaccel_deps="d3d11va"
2174 vc1_d3d11va_hwaccel_select="vc1_decoder"
2175 vc1_dxva2_hwaccel_deps="dxva2"
2176 vc1_dxva2_hwaccel_select="vc1_decoder"
2177 vc1_mmal_hwaccel_deps="mmal"
2178 vc1_qsv_hwaccel_deps="libmfx"
2179 vc1_vaapi_hwaccel_deps="vaapi"
2180 vc1_vaapi_hwaccel_select="vc1_decoder"
2181 vc1_vdpau_hwaccel_deps="vdpau"
2182 vc1_vdpau_hwaccel_select="vc1_decoder"
2183 vp8_qsv_hwaccel_deps="libmfx"
2184 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2185 vp8_vaapi_hwaccel_select="vp8_decoder"
2186 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2187 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2188 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2189 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2190
2191 # hardware-accelerated codecs
2192 nvenc_deps_any="dlopen LoadLibrary"
2193 nvenc_extralibs='$ldl'
2194 omx_deps="dlopen pthreads"
2195 omx_extralibs='$ldl'
2196 omx_rpi_select="omx"
2197 qsvdec_select="qsv"
2198 qsvenc_select="qsv"
2199 vaapi_encode_deps="vaapi"
2200
2201 hwupload_cuda_filter_deps="cuda"
2202 scale_npp_filter_deps="cuda libnpp"
2203
2204 h264_mmal_decoder_deps="mmal"
2205 h264_nvenc_encoder_deps="nvenc"
2206 h264_omx_encoder_deps="omx"
2207 h264_qsv_decoder_deps="libmfx"
2208 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2209 h264_qsv_encoder_deps="libmfx"
2210 h264_qsv_encoder_select="qsvenc"
2211 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2212 h264_vaapi_encoder_select="vaapi_encode golomb"
2213 hevc_nvenc_encoder_deps="nvenc"
2214 hevc_qsv_decoder_deps="libmfx"
2215 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2216 hevc_qsv_encoder_deps="libmfx"
2217 hevc_qsv_encoder_select="hevc_ps qsvenc"
2218 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2219 hevc_vaapi_encoder_select="vaapi_encode golomb"
2220 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2221 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2222 mpeg2_mmal_decoder_deps="mmal"
2223 mpeg2_qsv_decoder_deps="libmfx"
2224 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2225 mpeg2_qsv_encoder_deps="libmfx"
2226 mpeg2_qsv_encoder_select="qsvenc"
2227 mpeg4_omx_encoder_deps="omx"
2228 vc1_mmal_decoder_deps="mmal"
2229 vc1_qsv_decoder_deps="libmfx"
2230 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2231 vp8_qsv_decoder_deps="libmfx"
2232 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2233
2234 nvenc_h264_encoder_select="h264_nvenc_encoder"
2235 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2236
2237 # parsers
2238 h264_parser_select="golomb h264dsp h264parse"
2239 hevc_parser_select="hevc_ps"
2240 mpegaudio_parser_select="mpegaudioheader"
2241 mpegvideo_parser_select="mpegvideo"
2242 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2243 vc1_parser_select="vc1dsp"
2244
2245 # bitstream_filters
2246 mjpeg2jpeg_bsf_select="jpegtables"
2247
2248 # external libraries
2249 avisynth_deps="LoadLibrary"
2250 avxsynth_deps="dlopen"
2251 avisynth_demuxer_deps_any="avisynth avxsynth"
2252 avisynth_demuxer_select="riffdec"
2253 libdcadec_decoder_deps="libdcadec"
2254 libfaac_encoder_deps="libfaac"
2255 libfaac_encoder_select="audio_frame_queue"
2256 libfdk_aac_decoder_deps="libfdk_aac"
2257 libfdk_aac_encoder_deps="libfdk_aac"
2258 libfdk_aac_encoder_select="audio_frame_queue"
2259 libgsm_decoder_deps="libgsm"
2260 libgsm_encoder_deps="libgsm"
2261 libgsm_ms_decoder_deps="libgsm"
2262 libgsm_ms_encoder_deps="libgsm"
2263 libilbc_decoder_deps="libilbc"
2264 libilbc_encoder_deps="libilbc"
2265 libkvazaar_encoder_deps="libkvazaar"
2266 libmp3lame_encoder_deps="libmp3lame"
2267 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2268 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2269 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2270 libopencore_amrnb_encoder_select="audio_frame_queue"
2271 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2272 libopenh264_decoder_deps="libopenh264"
2273 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2274 libopenh264_encoder_deps="libopenh264"
2275 libopenjpeg_decoder_deps="libopenjpeg"
2276 libopenjpeg_encoder_deps="libopenjpeg"
2277 libopus_decoder_deps="libopus"
2278 libopus_encoder_deps="libopus"
2279 libopus_encoder_select="audio_frame_queue"
2280 libschroedinger_decoder_deps="libschroedinger"
2281 libschroedinger_encoder_deps="libschroedinger"
2282 libspeex_decoder_deps="libspeex"
2283 libspeex_encoder_deps="libspeex"
2284 libspeex_encoder_select="audio_frame_queue"
2285 libtheora_encoder_deps="libtheora"
2286 libtwolame_encoder_deps="libtwolame"
2287 libvo_aacenc_encoder_deps="libvo_aacenc"
2288 libvo_aacenc_encoder_select="audio_frame_queue"
2289 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2290 libvorbis_encoder_deps="libvorbis"
2291 libvorbis_encoder_select="audio_frame_queue"
2292 libvpx_vp8_decoder_deps="libvpx"
2293 libvpx_vp8_encoder_deps="libvpx"
2294 libvpx_vp9_decoder_deps="libvpx"
2295 libvpx_vp9_encoder_deps="libvpx"
2296 libwavpack_encoder_deps="libwavpack"
2297 libwavpack_encoder_select="audio_frame_queue"
2298 libwebp_encoder_deps="libwebp"
2299 libx262_encoder_deps="libx262"
2300 libx264_encoder_deps="libx264"
2301 libx265_encoder_deps="libx265"
2302 libxavs_encoder_deps="libxavs"
2303 libxvid_encoder_deps="libxvid mkstemp"
2304
2305 # demuxers / muxers
2306 ac3_demuxer_select="ac3_parser"
2307 asf_demuxer_select="riffdec"
2308 asf_muxer_select="riffenc"
2309 asf_stream_muxer_select="asf_muxer"
2310 avi_demuxer_select="iso_media riffdec"
2311 avi_muxer_select="riffenc"
2312 caf_demuxer_select="iso_media riffdec"
2313 dash_muxer_select="mp4_muxer"
2314 dirac_demuxer_select="dirac_parser"
2315 dv_demuxer_select="dvprofile"
2316 dv_muxer_select="dvprofile"
2317 dxa_demuxer_select="riffdec"
2318 eac3_demuxer_select="ac3_parser"
2319 f4v_muxer_select="mov_muxer"
2320 flac_demuxer_select="flac_parser"
2321 hds_muxer_select="flv_muxer"
2322 hls_muxer_select="mpegts_muxer"
2323 ipod_muxer_select="mov_muxer"
2324 ismv_muxer_select="mov_muxer"
2325 matroska_audio_muxer_select="matroska_muxer"
2326 matroska_demuxer_select="iso_media riffdec"
2327 matroska_demuxer_suggest="bzlib lzo zlib"
2328 matroska_muxer_select="iso_media riffenc"
2329 mmf_muxer_select="riffenc"
2330 mov_demuxer_select="iso_media riffdec"
2331 mov_demuxer_suggest="zlib"
2332 mov_muxer_select="iso_media riffenc rtpenc_chain"
2333 mp3_demuxer_select="mpegaudio_parser"
2334 mp3_muxer_select="mpegaudioheader"
2335 mp4_muxer_select="mov_muxer"
2336 mpegts_demuxer_select="iso_media"
2337 mpegts_muxer_select="adts_muxer latm_muxer"
2338 mpegtsraw_demuxer_select="mpegts_demuxer"
2339 mxf_d10_muxer_select="mxf_muxer"
2340 nut_muxer_select="riffenc"
2341 nuv_demuxer_select="riffdec"
2342 oga_muxer_select="ogg_muxer"
2343 ogg_demuxer_select="dirac_parse"
2344 opus_muxer_select="ogg_muxer"
2345 psp_muxer_select="mov_muxer"
2346 rtp_demuxer_select="sdp_demuxer"
2347 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2348 rtsp_demuxer_select="http_protocol rtpdec"
2349 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2350 sap_demuxer_select="sdp_demuxer"
2351 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2352 sdp_demuxer_select="rtpdec"
2353 smoothstreaming_muxer_select="ismv_muxer"
2354 spdif_muxer_select="aac_parser"
2355 spx_muxer_select="ogg_muxer"
2356 swf_demuxer_suggest="zlib"
2357 tak_demuxer_select="tak_parser"
2358 tg2_muxer_select="mov_muxer"
2359 tgp_muxer_select="mov_muxer"
2360 w64_demuxer_select="wav_demuxer"
2361 wav_demuxer_select="riffdec"
2362 wav_muxer_select="riffenc"
2363 webm_muxer_select="iso_media riffenc"
2364 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2365 wtv_demuxer_select="mpegts_demuxer riffdec"
2366 xmv_demuxer_select="riffdec"
2367 xwma_demuxer_select="riffdec"
2368
2369 # indevs / outdevs
2370 alsa_indev_deps="alsa"
2371 alsa_outdev_deps="alsa"
2372 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2373 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2374 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2375 dv1394_indev_deps="dv1394"
2376 dv1394_indev_select="dv_demuxer"
2377 fbdev_indev_deps="linux_fb_h"
2378 jack_indev_deps="jack"
2379 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2380 libcdio_indev_deps="libcdio"
2381 libdc1394_indev_deps="libdc1394"
2382 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2383 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2384 pulse_indev_deps="libpulse"
2385 sndio_indev_deps="sndio"
2386 sndio_outdev_deps="sndio"
2387 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2388 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2389 vfwcap_indev_extralibs="-lavicap32"
2390 xcbgrab_indev_deps="libxcb"
2391
2392 # protocols
2393 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2394 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2395 ffrtmpcrypt_protocol_select="tcp_protocol"
2396 ffrtmphttp_protocol_deps="!librtmp_protocol"
2397 ffrtmphttp_protocol_select="http_protocol"
2398 gopher_protocol_select="network"
2399 http_protocol_select="tcp_protocol"
2400 httpproxy_protocol_select="tcp_protocol"
2401 https_protocol_select="tls_protocol"
2402 icecast_protocol_select="http_protocol"
2403 librtmp_protocol_deps="librtmp"
2404 librtmpe_protocol_deps="librtmp"
2405 librtmps_protocol_deps="librtmp"
2406 librtmpt_protocol_deps="librtmp"
2407 librtmpte_protocol_deps="librtmp"
2408 mmsh_protocol_select="http_protocol"
2409 mmst_protocol_select="network"
2410 rtmp_protocol_deps="!librtmp_protocol"
2411 rtmp_protocol_select="tcp_protocol"
2412 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2413 rtmps_protocol_deps="!librtmp_protocol"
2414 rtmps_protocol_select="tls_protocol"
2415 rtmpt_protocol_select="ffrtmphttp_protocol"
2416 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2417 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2418 rtp_protocol_select="udp_protocol"
2419 sctp_protocol_deps="struct_sctp_event_subscribe"
2420 sctp_protocol_select="network"
2421 srtp_protocol_select="rtp_protocol srtp"
2422 tcp_protocol_select="network"
2423 tls_gnutls_protocol_deps="gnutls"
2424 tls_gnutls_protocol_select="tcp_protocol"
2425 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2426 tls_openssl_protocol_select="tcp_protocol"
2427 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2428 udp_protocol_select="network"
2429 unix_protocol_deps="sys_un_h"
2430 unix_protocol_select="network"
2431
2432 # filters
2433 asyncts_filter_deps="avresample"
2434 blackframe_filter_deps="gpl"
2435 boxblur_filter_deps="gpl"
2436 bs2b_filter_deps="libbs2b"
2437 cropdetect_filter_deps="gpl"
2438 deinterlace_qsv_filter_deps="libmfx"
2439 deinterlace_vaapi_filter_deps="vaapi"
2440 delogo_filter_deps="gpl"
2441 drawtext_filter_deps="libfreetype"
2442 frei0r_filter_deps="frei0r dlopen"
2443 frei0r_filter_extralibs='$ldl'
2444 frei0r_src_filter_deps="frei0r dlopen"
2445 frei0r_src_filter_extralibs='$ldl'
2446 hdcd_filter_deps="libhdcd"
2447 hqdn3d_filter_deps="gpl"
2448 interlace_filter_deps="gpl"
2449 movie_filter_deps="avcodec avformat"
2450 ocv_filter_deps="libopencv"
2451 resample_filter_deps="avresample"
2452 scale_filter_deps="swscale"
2453 scale_qsv_filter_deps="libmfx"
2454 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2455
2456 # examples
2457 decode_audio_example_deps="avcodec avutil"
2458 decode_video_example_deps="avcodec avutil"
2459 encode_audio_example_deps="avcodec avutil"
2460 encode_video_example_deps="avcodec avutil"
2461 filter_audio_example_deps="avfilter avutil"
2462 metadata_example_deps="avformat avutil"
2463 output_example_deps="avcodec avformat avresample avutil swscale"
2464 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2465 transcode_aac_example_deps="avcodec avformat avresample"
2466
2467 # libraries, in linking order
2468 avcodec_deps="avutil"
2469 avdevice_deps="avformat avcodec avutil"
2470 avfilter_deps="avutil"
2471 avformat_deps="avcodec avutil"
2472 avresample_deps="avutil"
2473 swscale_deps="avutil"
2474
2475 # programs
2476 avconv_deps="avcodec avfilter avformat avresample swscale"
2477 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2478                fps_filter null_filter resample_filter scale_filter
2479                trim_filter"
2480 avplay_deps="avcodec avfilter avformat avresample sdl"
2481 avplay_extralibs='$sdl_extralibs'
2482 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2483 avprobe_deps="avcodec avformat"
2484
2485 # documentation
2486 pod2man_deps="doc"
2487 texi2html_deps="doc"
2488
2489 # default parameters
2490
2491 logfile="config.log"
2492
2493 # installation paths
2494 prefix_default="/usr/local"
2495 bindir_default='${prefix}/bin'
2496 datadir_default='${prefix}/share/avconv'
2497 docdir_default='${prefix}/share/doc/libav'
2498 incdir_default='${prefix}/include'
2499 libdir_default='${prefix}/lib'
2500 mandir_default='${prefix}/share/man'
2501 shlibdir_default="$libdir_default"
2502
2503 # toolchain
2504 ar_default="ar"
2505 cc_default="gcc"
2506 host_cc_default="gcc"
2507 ln_s="ln -s -f"
2508 nm_default="nm -g"
2509 objformat="elf"
2510 pkg_config_default=pkg-config
2511 ranlib="ranlib"
2512 strip="strip"
2513 version_script='--version-script'
2514 yasmexe="yasm"
2515
2516 # machine
2517 arch_default=$(uname -m)
2518 cpu="generic"
2519 intrinsics="none"
2520
2521 # OS
2522 target_os_default=$(tolower $(uname -s))
2523 host_os=$target_os_default
2524
2525 # configurable options
2526 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2527
2528 enable asm
2529 enable debug
2530 enable doc
2531 enable faan faandct faanidct
2532 enable optimizations
2533 enable safe_bitstream_reader
2534 enable static
2535 enable swscale_alpha
2536 enable valgrind_backtrace
2537
2538 # By default, enable only those hwaccels that have no external dependencies.
2539 enable d3d11va dxva2 vda vdpau
2540
2541 # build settings
2542 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2543 LIBPREF="lib"
2544 LIBSUF=".a"
2545 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2546 SLIBPREF="lib"
2547 SLIBSUF=".so"
2548 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2549 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2550 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2551 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2552 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2553 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2554 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2555
2556 asflags_filter=echo
2557 cflags_filter=echo
2558 ldflags_filter=echo
2559
2560 AS_C='-c'
2561 AS_O='-o $@'
2562 CC_C='-c'
2563 CC_E='-E -o $@'
2564 CC_O='-o $@'
2565 OBJCC_C='-c'
2566 OBJCC_E='-E -o $@'
2567 OBJCC_O='-o $@'
2568 LD_O='-o $@'
2569 LD_LIB='-l%'
2570 LD_PATH='-L'
2571 HOSTCC_C='-c'
2572 HOSTCC_E='-E -o $@'
2573 HOSTCC_O='-o $@'
2574 HOSTLD_O='-o $@'
2575
2576 host_extralibs='-lm'
2577 host_cflags_filter=echo
2578 host_ldflags_filter=echo
2579
2580 target_path='$(CURDIR)'
2581
2582 # since the object filename is not given with the -MM flag, the compiler
2583 # is only able to print the basename, and we must add the path ourselves
2584 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2585 DEPFLAGS='-MM'
2586
2587 # find source path
2588 if test -f configure; then
2589     source_path=.
2590 else
2591     source_path=$(cd $(dirname "$0"); pwd)
2592     echo "$source_path" | grep -q '[[:blank:]]' &&
2593         die "Out of tree builds are impossible with whitespace in source path."
2594     test -e "$source_path/config.h" &&
2595         die "Out of tree builds are impossible with config.h in source dir."
2596 fi
2597
2598 for v in "$@"; do
2599     r=${v#*=}
2600     l=${v%"$r"}
2601     r=$(sh_quote "$r")
2602     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2603 done
2604
2605 find_things(){
2606     thing=$1
2607     pattern=$2
2608     file=$source_path/$3
2609     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2610 }
2611
2612 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2613 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2614 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2615 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2616 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2617 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2618 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2619 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2620 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2621
2622 find_things_extern(){
2623     thing=$1
2624     pattern=$2
2625     file=$source_path/$3
2626     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2627 }
2628
2629 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2630 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2631
2632 ALL_COMPONENTS="
2633     $BSF_LIST
2634     $DECODER_LIST
2635     $DEMUXER_LIST
2636     $ENCODER_LIST
2637     $FILTER_LIST
2638     $HWACCEL_LIST
2639     $INDEV_LIST
2640     $MUXER_LIST
2641     $OUTDEV_LIST
2642     $PARSER_LIST
2643     $PROTOCOL_LIST
2644 "
2645
2646 for n in $COMPONENT_LIST; do
2647     v=$(toupper ${n%s})_LIST
2648     eval enable \$$v
2649     eval ${n}_if_any="\$$v"
2650 done
2651
2652 enable $ARCH_EXT_LIST
2653
2654 die_unknown(){
2655     echo "Unknown option \"$1\"."
2656     echo "See $0 --help for available options."
2657     exit 1
2658 }
2659
2660 print_3_columns() {
2661     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2662 }
2663
2664 show_list() {
2665     suffix=_$1
2666     shift
2667     echo $* | sed s/$suffix//g | print_3_columns
2668     exit 0
2669 }
2670
2671 rand_list(){
2672     IFS=', '
2673     set -- $*
2674     unset IFS
2675     for thing; do
2676         comp=${thing%:*}
2677         prob=${thing#$comp}
2678         prob=${prob#:}
2679         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2680         echo "prob ${prob:-0.5}"
2681         printf '%s\n' $comp
2682     done
2683 }
2684
2685 do_random(){
2686     action=$1
2687     shift
2688     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2689     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2690 }
2691
2692 for opt do
2693     optval="${opt#*=}"
2694     case "$opt" in
2695         --extra-ldflags=*)
2696             add_ldflags $optval
2697         ;;
2698         --extra-ldexeflags=*)
2699             add_ldexeflags $optval
2700         ;;
2701         --extra-libs=*)
2702             add_extralibs $optval
2703         ;;
2704         --disable-devices)
2705             disable $INDEV_LIST $OUTDEV_LIST
2706         ;;
2707         --enable-debug=*)
2708             debuglevel="$optval"
2709         ;;
2710         --disable-programs)
2711             disable $PROGRAM_LIST
2712         ;;
2713         --disable-everything)
2714             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2715         ;;
2716         --disable-all)
2717             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2718             disable $LIBRARY_LIST $PROGRAM_LIST doc
2719         ;;
2720         --enable-random|--disable-random)
2721             action=${opt%%-random}
2722             do_random ${action#--} $COMPONENT_LIST
2723         ;;
2724         --enable-random=*|--disable-random=*)
2725             action=${opt%%-random=*}
2726             do_random ${action#--} $optval
2727         ;;
2728         --enable-*=*|--disable-*=*)
2729             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2730             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2731             eval list=\$$(toupper $thing)_LIST
2732             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2733             $action $(filter "$name" $list)
2734         ;;
2735         --enable-avserver|--disable-avserver*)
2736             warn "avserver has been removed, the ${opt} option is only"\
2737                  "provided for compatibility and will be removed in the future"
2738         ;;
2739         --enable-?*|--disable-?*)
2740             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2741             if is_in $option $COMPONENT_LIST; then
2742                 test $action = disable && action=unset
2743                 eval $action \$$(toupper ${option%s})_LIST
2744             elif is_in $option $CMDLINE_SELECT; then
2745                 $action $option
2746             else
2747                 die_unknown $opt
2748             fi
2749         ;;
2750         --list-*)
2751             NAME="${opt#--list-}"
2752             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2753             NAME=${NAME%s}
2754             eval show_list $NAME \$$(toupper $NAME)_LIST
2755         ;;
2756         --help|-h) show_help
2757         ;;
2758         --quiet|-q) quiet=yes
2759         ;;
2760         *)
2761             optname="${opt%%=*}"
2762             optname="${optname#--}"
2763             optname=$(echo "$optname" | sed 's/-/_/g')
2764             if is_in $optname $CMDLINE_SET; then
2765                 eval $optname='$optval'
2766             elif is_in $optname $CMDLINE_APPEND; then
2767                 append $optname "$optval"
2768             else
2769                 die_unknown $opt
2770             fi
2771         ;;
2772     esac
2773 done
2774
2775 for e in $env; do
2776     eval "export $e"
2777 done
2778
2779 disabled logging && logfile=/dev/null
2780
2781 # Die early if licensing-related configure options are incompatible.
2782 die_license_disabled() {
2783     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2784 }
2785
2786 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2787 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2788 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2789
2790 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2791
2792 # Disable all the library-specific components if the library itself
2793 # is disabled, see AVCODEC_LIST and following _LIST variables.
2794
2795 disable_components(){
2796     disabled ${1} && disable $(
2797         eval components="\$$(toupper ${1})_COMPONENTS"
2798         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2799     )
2800 }
2801
2802 map 'disable_components $v' $LIBRARY_LIST
2803
2804 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2805 set >> $logfile
2806
2807 case "$toolchain" in
2808     *-asan)
2809         cc_default="${toolchain%-asan}"
2810         add_cflags  -fsanitize=address
2811         add_ldflags -fsanitize=address
2812     ;;
2813     *-msan)
2814         cc_default="${toolchain%-msan}"
2815         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2816         add_ldflags -fsanitize=memory
2817     ;;
2818     *-tsan)
2819         cc_default="${toolchain%-tsan}"
2820         add_cflags  -fsanitize=thread -fPIE
2821         add_ldflags -fsanitize=thread -pie
2822         case "$toolchain" in
2823             gcc-tsan)
2824                 add_cflags  -fPIC
2825                 add_ldflags -fPIC
2826                 ;;
2827         esac
2828     ;;
2829     *-usan)
2830         cc_default="${toolchain%-usan}"
2831         add_cflags  -fsanitize=undefined
2832         add_ldflags -fsanitize=undefined
2833         case "$toolchain" in
2834             clang-usan)
2835                 add_cflags -O1
2836                 ;;
2837         esac
2838     ;;
2839     valgrind-*)
2840         target_exec_default="valgrind"
2841         case "$toolchain" in
2842             valgrind-massif)
2843                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2844                 ;;
2845             valgrind-memcheck)
2846                 target_exec_args="--track-origins=yes --leak-check=full"
2847                 ;;
2848         esac
2849     ;;
2850     msvc)
2851         # Check whether the current MSVC version needs the C99 converter.
2852         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2853         # support enough of C99 to build libav. Default to the new
2854         # behaviour if the regexp was unable to match anything, since this
2855         # successfully parses the version number of existing supported
2856         # versions that require the converter (MSVC 2010 and 2012).
2857         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2858         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2859             cc_default="cl"
2860         else
2861             cc_default="c99wrap cl"
2862         fi
2863         ld_default="$source_path/compat/windows/mslink"
2864         nm_default="dumpbin -symbols"
2865         ar_default="lib"
2866         case "$arch" in
2867         arm*)
2868             as_default="armasm"
2869             ;;
2870         esac
2871         target_os_default="win32"
2872         # Use a relative path for TMPDIR. This makes sure all the
2873         # ffconf temp files are written with a relative path, avoiding
2874         # issues with msys/win32 path conversion for MSVC parameters
2875         # such as -Fo<file> or -out:<file>.
2876         TMPDIR=.
2877     ;;
2878     icl)
2879         cc_default="icl"
2880         ld_default="xilink"
2881         nm_default="dumpbin -symbols"
2882         ar_default="xilib"
2883         target_os_default="win32"
2884         TMPDIR=.
2885     ;;
2886     gcov)
2887         add_cflags  -fprofile-arcs -ftest-coverage
2888         add_ldflags -fprofile-arcs -ftest-coverage
2889     ;;
2890     llvm-cov)
2891         add_cflags -fprofile-arcs -ftest-coverage
2892         add_ldflags --coverage
2893     ;;
2894     hardened)
2895         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2896         add_cflags   -fno-strict-overflow -fstack-protector-all
2897         add_ldflags  -Wl,-z,relro -Wl,-z,now
2898     ;;
2899     ?*)
2900         die "Unknown toolchain $toolchain"
2901     ;;
2902 esac
2903
2904 test -n "$cross_prefix" && enable cross_compile
2905
2906 if enabled cross_compile; then
2907     test -n "$arch" && test -n "$target_os" ||
2908         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2909 fi
2910
2911 ar_default="${cross_prefix}${ar_default}"
2912 cc_default="${cross_prefix}${cc_default}"
2913 occ_default="${cross_prefix}${occ_default}"
2914 nm_default="${cross_prefix}${nm_default}"
2915 pkg_config_default="${cross_prefix}${pkg_config_default}"
2916 ranlib="${cross_prefix}${ranlib}"
2917 strip="${cross_prefix}${strip}"
2918
2919 sysinclude_default="${sysroot}/usr/include"
2920
2921 set_default arch cc pkg_config sysinclude target_exec target_os
2922 enabled cross_compile || host_cc_default=$cc
2923 set_default host_cc
2924
2925 if ! $pkg_config --version >/dev/null 2>&1; then
2926     warn "$pkg_config not found, library detection may fail."
2927     pkg_config=false
2928 fi
2929
2930 exesuf() {
2931     case $1 in
2932         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2933     esac
2934 }
2935
2936 EXESUF=$(exesuf $target_os)
2937 HOSTEXESUF=$(exesuf $host_os)
2938
2939 # set temporary file name
2940 : ${TMPDIR:=$TEMPDIR}
2941 : ${TMPDIR:=$TMP}
2942 : ${TMPDIR:=/tmp}
2943
2944 if ! check_cmd mktemp -u XXXXXX; then
2945     # simple replacement for missing mktemp
2946     # NOT SAFE FOR GENERAL USE
2947     mktemp(){
2948         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2949     }
2950 fi
2951
2952 tmpfile(){
2953     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2954         (set -C; exec > $tmp) 2>/dev/null ||
2955         die "Unable to create temporary file in $TMPDIR."
2956     append TMPFILES $tmp
2957     eval $1=$tmp
2958 }
2959
2960 trap 'rm -f -- $TMPFILES' EXIT
2961
2962 tmpfile TMPASM .asm
2963 tmpfile TMPC   .c
2964 tmpfile TMPE   $EXESUF
2965 tmpfile TMPH   .h
2966 tmpfile TMPO   .o
2967 tmpfile TMPS   .S
2968 tmpfile TMPSH  .sh
2969 tmpfile TMPV   .ver
2970
2971 unset -f mktemp
2972
2973 chmod +x $TMPE
2974
2975 # make sure we can execute files in $TMPDIR
2976 cat > $TMPSH 2>> $logfile <<EOF
2977 #! /bin/sh
2978 EOF
2979 chmod +x $TMPSH >> $logfile 2>&1
2980 if ! $TMPSH >> $logfile 2>&1; then
2981     cat <<EOF
2982 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2983 variable to another directory and make sure that it is not mounted noexec.
2984 EOF
2985     die "Sanity test failed."
2986 fi
2987
2988 armasm_flags(){
2989     for flag; do
2990         case $flag in
2991             # Filter out MSVC cl.exe options from cflags that shouldn't
2992             # be passed to gas-preprocessor
2993             -M[TD]*)                                            ;;
2994             *)                  echo $flag                      ;;
2995         esac
2996    done
2997 }
2998
2999 ccc_flags(){
3000     for flag; do
3001         case $flag in
3002             -std=c99)           echo -c99                       ;;
3003             -mcpu=*)            echo -arch ${flag#*=}           ;;
3004             -mieee)             echo -ieee                      ;;
3005             -O*|-fast)          echo $flag                      ;;
3006             -fno-math-errno)    echo -assume nomath_errno       ;;
3007             -g)                 echo -g3                        ;;
3008             -Wall)              echo -msg_enable level2         ;;
3009             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3010             -Wl,*)              echo $flag                      ;;
3011             -f*|-W*)                                            ;;
3012             *)                  echo $flag                      ;;
3013         esac
3014    done
3015 }
3016
3017 cparser_flags(){
3018     for flag; do
3019         case $flag in
3020             -Wno-switch)             echo -Wno-switch-enum ;;
3021             -Wno-format-zero-length) ;;
3022             -Wdisabled-optimization) ;;
3023             -Wno-pointer-sign)       echo -Wno-other ;;
3024             *)                       echo $flag ;;
3025         esac
3026     done
3027 }
3028
3029 msvc_common_flags(){
3030     for flag; do
3031         case $flag in
3032             # In addition to specifying certain flags under the compiler
3033             # specific filters, they must be specified here as well or else the
3034             # generic catch all at the bottom will print the original flag.
3035             -Wall)                ;;
3036             -std=c99)             ;;
3037             # Common flags
3038             -fomit-frame-pointer) ;;
3039             -g)                   echo -Z7 ;;
3040             -fno-math-errno)      ;;
3041             -fno-common)          ;;
3042             -fno-signed-zeros)    ;;
3043             -fPIC)                ;;
3044             -mthumb)              ;;
3045             -march=*)             ;;
3046             -lz)                  echo zlib.lib ;;
3047             -lavicap32)           echo vfw32.lib user32.lib ;;
3048             -lx264)               echo libx264.lib ;;
3049             -l*)                  echo ${flag#-l}.lib ;;
3050             -L*)                  echo -libpath:${flag#-L} ;;
3051             *)                    echo $flag ;;
3052         esac
3053     done
3054 }
3055
3056 msvc_flags(){
3057     msvc_common_flags "$@"
3058     for flag; do
3059         case $flag in
3060             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3061                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3062                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3063                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3064         esac
3065     done
3066 }
3067
3068 icl_flags(){
3069     msvc_common_flags "$@"
3070     for flag; do
3071         case $flag in
3072             # Despite what Intel's documentation says -Wall, which is supported
3073             # on Windows, does enable remarks so disable them here.
3074             -Wall)                echo $flag -Qdiag-disable:remark ;;
3075             -std=c99)             echo -Qstd=c99 ;;
3076         esac
3077     done
3078 }
3079
3080 pgi_flags(){
3081     for flag; do
3082         case $flag in
3083             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3084             -fomit-frame-pointer) echo -Mnoframe ;;
3085             -g)                   echo -gopt ;;
3086             *)                    echo $flag ;;
3087         esac
3088     done
3089 }
3090
3091 suncc_flags(){
3092     for flag; do
3093         case $flag in
3094             -march=*|-mcpu=*)
3095                 case "${flag#*=}" in
3096                     native)                   echo -xtarget=native       ;;
3097                     v9|niagara)               echo -xarch=sparc          ;;
3098                     ultrasparc)               echo -xarch=sparcvis       ;;
3099                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3100                     i586|pentium)             echo -xchip=pentium        ;;
3101                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3102                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3103                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3104                     pentium4*)          echo -xtarget=pentium4           ;;
3105                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3106                     *-sse3)             echo -xarch=sse3                 ;;
3107                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3108                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3109                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3110                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3111                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3112                     k8|opteron|athlon64|athlon-fx)
3113                                                echo -xarch=sse2a         ;;
3114                     athlon*)                   echo -xarch=pentium_proa  ;;
3115                 esac
3116                 ;;
3117             -std=c99)             echo -xc99              ;;
3118             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3119             -fPIC)                echo -KPIC -xcode=pic32 ;;
3120             -W*,*)                echo $flag              ;;
3121             -f*-*|-W*|-mimpure-text)                      ;;
3122             -shared)              echo -G                 ;;
3123             *)                    echo $flag              ;;
3124         esac
3125     done
3126 }
3127
3128 tms470_flags(){
3129     for flag; do
3130         case $flag in
3131             -march=*|-mcpu=*)
3132                 case "${flag#*=}" in
3133                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3134                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3135                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3136                     armv6*|arm11*)          echo -mv=6   ;;
3137                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3138                                             echo -mv=5e  ;;
3139                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3140                 esac
3141                 ;;
3142             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3143             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3144             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3145             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3146             -msoft-float)   echo --float_support=vfplib       ;;
3147             -O[0-3]|-mf=*)  echo $flag                        ;;
3148             -g)             echo -g -mn                       ;;
3149             -pds=*)         echo $flag                        ;;
3150             -D*|-I*)        echo $flag                        ;;
3151             --gcc|--abi=*)  echo $flag                        ;;
3152             -me)            echo $flag                        ;;
3153         esac
3154     done
3155 }
3156
3157 probe_cc(){
3158     pfx=$1
3159     _cc=$2
3160
3161     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3162     unset _ld_o _ldflags _ld_lib _ld_path
3163     unset _depflags _DEPCMD _DEPFLAGS
3164     _flags_filter=echo
3165
3166     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3167         _type=llvm_gcc
3168         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3169         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3170         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3171         _cflags_speed='-O3'
3172         _cflags_size='-Os'
3173     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3174         _type=gcc
3175         gcc_version=$($_cc --version | head -n1)
3176         gcc_basever=$($_cc -dumpversion)
3177         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3178         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3179         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3180         if ! $_cc -dumpversion | grep -q '^2\.'; then
3181             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3182         fi
3183         _cflags_speed='-O3'
3184         _cflags_size='-Os'
3185     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3186         _type=icc
3187         _ident=$($_cc --version | head -n1)
3188         _depflags='-MMD'
3189         _cflags_speed='-O3'
3190         _cflags_size='-Os'
3191         _cflags_noopt='-O1'
3192     elif $_cc -v 2>&1 | grep -q xlc; then
3193         _type=xlc
3194         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3195         _cflags_speed='-O5'
3196         _cflags_size='-O5 -qcompact'
3197     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3198         _type=ccc
3199         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3200         _DEPFLAGS='-M'
3201         _cflags_speed='-fast'
3202         _cflags_size='-O1'
3203         _flags_filter=ccc_flags
3204     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3205         test -d "$sysroot" || die "No valid sysroot specified."
3206         _type=armcc
3207         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3208         armcc_conf="$PWD/armcc.conf"
3209         $_cc --arm_linux_configure                 \
3210              --arm_linux_config_file="$armcc_conf" \
3211              --configure_sysroot="$sysroot"        \
3212              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3213              die "Error creating armcc configuration file."
3214         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3215         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3216         as_default="${cross_prefix}gcc"
3217         _depflags='-MMD'
3218         _cflags_speed='-O3'
3219         _cflags_size='-Os'
3220     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3221         _type=tms470
3222         _ident=$($_cc -version | head -n1 | tr -s ' ')
3223         _flags='--gcc --abi=eabi -me'
3224         _cc_e='-ppl -fe=$@'
3225         _cc_o='-fe=$@'
3226         _depflags='-ppa -ppd=$(@:.o=.d)'
3227         _cflags_speed='-O3 -mf=5'
3228         _cflags_size='-O3 -mf=2'
3229         _flags_filter=tms470_flags
3230     elif $_cc -v 2>&1 | grep -q clang; then
3231         _type=clang
3232         _ident=$($_cc --version 2>/dev/null | head -n1)
3233         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3234         _cflags_speed='-O3'
3235         _cflags_size='-Os'
3236     elif $_cc -V 2>&1 | grep -q Sun; then
3237         _type=suncc
3238         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3239         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3240         _DEPFLAGS='-xM1 -xc99'
3241         _ldflags='-std=c99'
3242         _cflags_speed='-O5'
3243         _cflags_size='-O5 -xspace'
3244         _flags_filter=suncc_flags
3245     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3246         _type=pathscale
3247         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3248         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3249         _cflags_speed='-O2'
3250         _cflags_size='-Os'
3251         _flags_filter='filter_out -Wdisabled-optimization'
3252     elif $_cc -v 2>&1 | grep -q Open64; then
3253         _type=open64
3254         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3255         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3256         _cflags_speed='-O2'
3257         _cflags_size='-Os'
3258         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3259     elif $_cc -V 2>&1 | grep -q Portland; then
3260         _type=pgi
3261         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3262         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3263         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3264         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3265         _cflags_noopt="-O1"
3266         _flags_filter=pgi_flags
3267     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3268         _type=armasm
3269         _ident=$($_cc | head -n1)
3270         # 4509: "This form of conditional instruction is deprecated"
3271         _flags="-nologo -ignore 4509"
3272         _flags_filter=armasm_flags
3273     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3274         _type=msvc
3275         _ident=$($_cc 2>&1 | head -n1)
3276         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3277         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3278         _cflags_speed="-O2"
3279         _cflags_size="-O1"
3280         if $_cc -nologo- 2>&1 | grep -q Linker; then
3281             _ld_o='-out:$@'
3282         else
3283             _ld_o='-Fe$@'
3284         fi
3285         _cc_o='-Fo$@'
3286         _cc_e='-P -Fi$@'
3287         _flags_filter=msvc_flags
3288         _ld_lib='lib%.a'
3289         _ld_path='-libpath:'
3290         _flags='-nologo'
3291     elif $_cc 2>&1 | grep -q Intel; then
3292         _type=icl
3293         _ident=$($_cc 2>&1 | head -n1)
3294         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3295         # Not only is O3 broken on 13.x+ but it is slower on all previous
3296         # versions (tested) as well.
3297         _cflags_speed="-O2"
3298         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3299         if $_cc 2>&1 | grep -q Linker; then
3300             _ld_o='-out:$@'
3301         else
3302             _ld_o='-Fe$@'
3303         fi
3304         _cc_o='-Fo$@'
3305         _cc_e='-P'
3306         _flags_filter=icl_flags
3307         _ld_lib='lib%.a'
3308         _ld_path='-libpath:'
3309         # -Qdiag-error to make icl error when seeing certain unknown arguments
3310         _flags='-nologo -Qdiag-error:4044,10157'
3311         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3312         # with MSVC which enables it by default.
3313         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3314     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3315         # lld can emulate multiple different linkers; in ms link.exe mode,
3316         # the -? parameter gives the help output which contains an identifyable
3317         # string, while it gives an error in other modes.
3318         _type=lld-link
3319         # The link.exe mode doesn't have a switch for getting the version,
3320         # but we can force it back to gnu mode and get the version from there.
3321         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3322         _ld_o='-out:$@'
3323         _flags_filter=msvc_flags
3324         _ld_lib='lib%.a'
3325         _ld_path='-libpath:'
3326     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3327         _type=cparser
3328         _ident=$($_cc --version | head -n1)
3329         _depflags='-MMD'
3330         _cflags_speed='-O4'
3331         _cflags_size='-O2'
3332         _flags_filter=cparser_flags
3333     fi
3334
3335     eval ${pfx}_type=\$_type
3336     eval ${pfx}_ident=\$_ident
3337 }
3338
3339 set_ccvars(){
3340     eval ${1}_C=\${_cc_c-\${${1}_C}}
3341     eval ${1}_E=\${_cc_e-\${${1}_E}}
3342     eval ${1}_O=\${_cc_o-\${${1}_O}}
3343
3344     if [ -n "$_depflags" ]; then
3345         eval ${1}_DEPFLAGS=\$_depflags
3346     else
3347         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3348         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3349         eval DEP${1}FLAGS=\$_flags
3350     fi
3351 }
3352
3353 probe_cc cc "$cc"
3354 cflags_filter=$_flags_filter
3355 cflags_speed=$_cflags_speed
3356 cflags_size=$_cflags_size
3357 cflags_noopt=$_cflags_noopt
3358 add_cflags $_flags $_cflags
3359 cc_ldflags=$_ldflags
3360 set_ccvars CC
3361
3362 probe_cc hostcc "$host_cc"
3363 host_cflags_filter=$_flags_filter
3364 add_host_cflags  $_flags $_cflags
3365 set_ccvars HOSTCC
3366
3367 test -n "$cc_type" && enable $cc_type ||
3368     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3369
3370 : ${as_default:=$cc}
3371 : ${objcc_default:=$cc}
3372 : ${dep_cc_default:=$cc}
3373 : ${ld_default:=$cc}
3374 : ${host_ld_default:=$host_cc}
3375 set_default ar as objcc dep_cc ld host_ld
3376
3377 probe_cc as "$as"
3378 asflags_filter=$_flags_filter
3379 add_asflags $_flags $_cflags
3380 set_ccvars AS
3381
3382 probe_cc objcc "$objcc"
3383 objcflags_filter=$_flags_filter
3384 add_objcflags $_flags $_cflags
3385 set_ccvars OBJC
3386
3387 probe_cc ld "$ld"
3388 ldflags_filter=$_flags_filter
3389 add_ldflags $_flags $_ldflags
3390 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3391 LD_O=${_ld_o-$LD_O}
3392 LD_LIB=${_ld_lib-$LD_LIB}
3393 LD_PATH=${_ld_path-$LD_PATH}
3394
3395 probe_cc hostld "$host_ld"
3396 host_ldflags_filter=$_flags_filter
3397 add_host_ldflags $_flags $_ldflags
3398 HOSTLD_O=${_ld_o-$HOSTLD_O}
3399
3400 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3401     probe_cc depcc "$dep_cc"
3402     CCDEP=${_DEPCMD:-$DEPCMD}
3403     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3404     DEPCCFLAGS=$_flags
3405 fi
3406
3407 if $ar 2>&1 | grep -q Microsoft; then
3408     arflags="-nologo"
3409     ar_o='-out:$@'
3410 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3411     arflags="rq"
3412     ar_o='$@'
3413 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3414     arflags='-Xany -r -c'
3415     ar_o='$@'
3416 else
3417     arflags="rc"
3418     ar_o='$@'
3419 fi
3420
3421 add_cflags $extra_cflags
3422 add_objcflags $extra_objcflags
3423 add_asflags $extra_cflags
3424
3425 if test -n "$sysroot"; then
3426     case "$cc_type" in
3427         gcc|llvm_gcc|clang)
3428             add_cppflags --sysroot="$sysroot"
3429             add_ldflags --sysroot="$sysroot"
3430         ;;
3431         tms470)
3432             add_cppflags -I"$sysinclude"
3433             add_ldflags  --sysroot="$sysroot"
3434         ;;
3435     esac
3436 fi
3437
3438 if test "$cpu" = host; then
3439     enabled cross_compile &&
3440         die "--cpu=host makes no sense when cross-compiling."
3441
3442     case "$cc_type" in
3443         gcc|llvm_gcc)
3444             check_native(){
3445                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3446                 sed -n "/cc1.*$1=/{
3447                             s/.*$1=\\([^ ]*\\).*/\\1/
3448                             p
3449                             q
3450                         }" $TMPE
3451             }
3452             cpu=$(check_native -march || check_native -mcpu)
3453         ;;
3454     esac
3455
3456     test "${cpu:-host}" = host &&
3457         die "--cpu=host not supported with compiler $cc"
3458 fi
3459
3460 # Deal with common $arch aliases
3461 case "$arch" in
3462     aarch64|arm64)
3463         arch="aarch64"
3464     ;;
3465     arm*)
3466         arch="arm"
3467     ;;
3468     mips*|IP*)
3469         case "$arch" in
3470         *el)
3471             add_cppflags -EL
3472             add_ldflags -EL
3473         ;;
3474         *eb)
3475             add_cppflags -EB
3476             add_ldflags -EB
3477         ;;
3478         esac
3479         arch="mips"
3480     ;;
3481     parisc*|hppa*)
3482         arch="parisc"
3483     ;;
3484     "Power Macintosh"|ppc*|powerpc*)
3485         arch="ppc"
3486     ;;
3487     s390|s390x)
3488         arch="s390"
3489     ;;
3490     sh4|sh)
3491         arch="sh4"
3492     ;;
3493     sun4u|sparc*)
3494         arch="sparc"
3495     ;;
3496     tilegx|tile-gx)
3497         arch="tilegx"
3498     ;;
3499     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3500         arch="x86"
3501     ;;
3502 esac
3503
3504 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3505 enable $arch
3506
3507 # Add processor-specific flags
3508 if enabled aarch64; then
3509
3510     case $cpu in
3511         armv*)
3512             cpuflags="-march=$cpu"
3513         ;;
3514         *)
3515             cpuflags="-mcpu=$cpu"
3516         ;;
3517     esac
3518
3519 elif enabled alpha; then
3520
3521     cpuflags="-mcpu=$cpu"
3522
3523 elif enabled arm; then
3524
3525     check_arm_arch() {
3526         check_cpp_condition stddef.h \
3527             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3528             $cpuflags
3529     }
3530
3531     probe_arm_arch() {
3532         if   check_arm_arch 4;        then echo armv4
3533         elif check_arm_arch 4T;       then echo armv4t
3534         elif check_arm_arch 5;        then echo armv5
3535         elif check_arm_arch 5E;       then echo armv5e
3536         elif check_arm_arch 5T;       then echo armv5t
3537         elif check_arm_arch 5TE;      then echo armv5te
3538         elif check_arm_arch 5TEJ;     then echo armv5te
3539         elif check_arm_arch 6;        then echo armv6
3540         elif check_arm_arch 6J;       then echo armv6j
3541         elif check_arm_arch 6K;       then echo armv6k
3542         elif check_arm_arch 6Z;       then echo armv6z
3543         elif check_arm_arch 6ZK;      then echo armv6zk
3544         elif check_arm_arch 6T2;      then echo armv6t2
3545         elif check_arm_arch 7;        then echo armv7
3546         elif check_arm_arch 7A  7_A;  then echo armv7-a
3547         elif check_arm_arch 7S;       then echo armv7-a
3548         elif check_arm_arch 7R  7_R;  then echo armv7-r
3549         elif check_arm_arch 7M  7_M;  then echo armv7-m
3550         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3551         elif check_arm_arch 8A  8_A;  then echo armv8-a
3552         fi
3553     }
3554
3555     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3556
3557     case $cpu in
3558         armv*)
3559             cpuflags="-march=$cpu"
3560             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3561         ;;
3562         *)
3563             cpuflags="-mcpu=$cpu"
3564             case $cpu in
3565                 cortex-a*)                               subarch=armv7a  ;;
3566                 cortex-r*)                               subarch=armv7r  ;;
3567                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3568                 arm11*)                                  subarch=armv6   ;;
3569                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3570                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3571                 *)                             subarch=$(probe_arm_arch) ;;
3572             esac
3573         ;;
3574     esac
3575
3576     case "$subarch" in
3577         armv5t*)    enable fast_clz                ;;
3578         armv[6-8]*) enable fast_clz fast_unaligned ;;
3579     esac
3580
3581 elif enabled avr32; then
3582
3583     case $cpu in
3584         ap7[02]0[0-2])
3585             subarch="avr32_ap"
3586             cpuflags="-mpart=$cpu"
3587         ;;
3588         ap)
3589             subarch="avr32_ap"
3590             cpuflags="-march=$cpu"
3591         ;;
3592         uc3[ab]*)
3593             subarch="avr32_uc"
3594             cpuflags="-mcpu=$cpu"
3595         ;;
3596         uc)
3597             subarch="avr32_uc"
3598             cpuflags="-march=$cpu"
3599         ;;
3600     esac
3601
3602 elif enabled bfin; then
3603
3604     cpuflags="-mcpu=$cpu"
3605
3606 elif enabled mips; then
3607
3608     cpuflags="-march=$cpu"
3609
3610 elif enabled ppc; then
3611
3612     disable ldbrx
3613
3614     case $(tolower $cpu) in
3615         601|ppc601|powerpc601)
3616             cpuflags="-mcpu=601"
3617             disable altivec
3618         ;;
3619         603*|ppc603*|powerpc603*)
3620             cpuflags="-mcpu=603"
3621             disable altivec
3622         ;;
3623         604*|ppc604*|powerpc604*)
3624             cpuflags="-mcpu=604"
3625             disable altivec
3626         ;;
3627         g3|75*|ppc75*|powerpc75*)
3628             cpuflags="-mcpu=750"
3629             disable altivec
3630         ;;
3631         g4|745*|ppc745*|powerpc745*)
3632             cpuflags="-mcpu=7450"
3633             disable vsx
3634         ;;
3635         74*|ppc74*|powerpc74*)
3636             cpuflags="-mcpu=7400"
3637             disable vsx
3638         ;;
3639         g5|970|ppc970|powerpc970)
3640             cpuflags="-mcpu=970"
3641             disable vsx
3642         ;;
3643         power[3-6]*)
3644             cpuflags="-mcpu=$cpu"
3645             disable vsx
3646         ;;
3647         power[7-8]*)
3648             cpuflags="-mcpu=$cpu"
3649             enable ldbrx
3650         ;;
3651         cell)
3652             cpuflags="-mcpu=cell"
3653             enable ldbrx
3654             disable vsx
3655         ;;
3656         e500mc)
3657             cpuflags="-mcpu=e500mc"
3658             disable altivec
3659         ;;
3660         e500v2)
3661             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3662             disable altivec
3663             disable dcbzl
3664         ;;
3665         e500)
3666             cpuflags="-mcpu=8540 -mhard-float"
3667             disable altivec
3668             disable dcbzl
3669         ;;
3670     esac
3671
3672 elif enabled sparc; then
3673
3674     case $cpu in
3675         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3676             cpuflags="-mcpu=$cpu"
3677         ;;
3678         ultrasparc*|niagara[234])
3679             cpuflags="-mcpu=$cpu"
3680         ;;
3681     esac
3682
3683 elif enabled x86; then
3684
3685     case $cpu in
3686         i[345]86|pentium)
3687             cpuflags="-march=$cpu"
3688             disable i686
3689             disable mmx
3690         ;;
3691         # targets that do NOT support nopl and conditional mov (cmov)
3692         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3693             cpuflags="-march=$cpu"
3694             disable i686
3695         ;;
3696         # targets that do support nopl and conditional mov (cmov)
3697         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3698             cpuflags="-march=$cpu"
3699             enable i686
3700             enable fast_cmov
3701         ;;
3702         # targets that do support conditional mov but on which it's slow
3703         pentium4|pentium4m|prescott|nocona)
3704             cpuflags="-march=$cpu"
3705             enable i686
3706             disable fast_cmov
3707         ;;
3708     esac
3709
3710 fi
3711
3712 if [ "$cpu" != generic ]; then
3713     add_cflags  $cpuflags
3714     add_asflags $cpuflags
3715     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3716 fi
3717
3718 # compiler sanity check
3719 check_exec <<EOF
3720 int main(void){ return 0; }
3721 EOF
3722 if test "$?" != 0; then
3723     echo "$cc is unable to create an executable file."
3724     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3725         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3726         echo "Only do this if you know what cross compiling means."
3727     fi
3728     die "C compiler test failed."
3729 fi
3730
3731 add_cppflags -D_ISOC99_SOURCE
3732
3733 # some compilers silently accept -std=c11, so we also need to check that the
3734 # version macro is defined properly
3735 if test_cflags_cpp -std=c11 "__STDC_VERSION__ >= 201112L"; then
3736     add_cflags -std=c11
3737 else
3738     check_cflags -std=c99
3739 fi
3740
3741 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3742 #include <stdlib.h>
3743 EOF
3744 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3745 #include <stdlib.h>
3746 EOF
3747
3748 add_host_cppflags -D_ISOC99_SOURCE
3749 check_host_cflags -std=c99
3750 check_host_cflags -Wall
3751 check_host_cflags -O3
3752
3753 check_64bit(){
3754     arch32=$1
3755     arch64=$2
3756     expr=$3
3757     check_code cc "" "int test[2*($expr) - 1]" &&
3758         subarch=$arch64 || subarch=$arch32
3759 }
3760
3761 case "$arch" in
3762     aarch64|alpha|ia64)
3763         spic=$shared
3764     ;;
3765     mips)
3766         check_64bit mips mips64 '_MIPS_SIM > 1'
3767         spic=$shared
3768     ;;
3769     parisc)
3770         check_64bit parisc parisc64 'sizeof(void *) > 4'
3771         spic=$shared
3772     ;;
3773     ppc)
3774         check_64bit ppc ppc64 'sizeof(void *) > 4'
3775         spic=$shared
3776     ;;
3777     s390)
3778         check_64bit s390 s390x 'sizeof(void *) > 4'
3779         spic=$shared
3780     ;;
3781     sparc)
3782         check_64bit sparc sparc64 'sizeof(void *) > 4'
3783         spic=$shared
3784     ;;
3785     x86)
3786         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3787         if test "$subarch" = "x86_64"; then
3788             spic=$shared
3789         fi
3790     ;;
3791 esac
3792
3793 enable $subarch
3794 enabled spic && enable_weak pic
3795
3796 # OS specific
3797 case $target_os in
3798     aix)
3799         SHFLAGS=-shared
3800         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3801         enabled shared && add_ldflags -Wl,-brtl
3802         ;;
3803     android)
3804         disable symver
3805         enable section_data_rel_ro
3806         SLIB_INSTALL_NAME='$(SLIBNAME)'
3807         SLIB_INSTALL_LINKS=
3808         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3809         ;;
3810     haiku)
3811         prefix_default="/boot/common"
3812         network_extralibs="-lnetwork"
3813         host_extralibs=
3814         ;;
3815     sunos)
3816         SHFLAGS='-shared -Wl,-h,$$(@F)'
3817         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3818         network_extralibs="-lsocket -lnsl"
3819         # When using suncc to build, the Solaris linker will mark
3820         # an executable with each instruction set encountered by
3821         # the Solaris assembler.  As our libraries contain their own
3822         # guards for processor-specific code, instead suppress
3823         # generation of the HWCAPS ELF section on Solaris x86 only.
3824         enabled_all suncc x86 &&
3825             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3826             add_ldflags -Wl,-M,mapfile
3827         nm_default='nm -P -g'
3828         version_script='-M'
3829         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3830         ;;
3831     netbsd)
3832         disable symver
3833         oss_indev_extralibs="-lossaudio"
3834         oss_outdev_extralibs="-lossaudio"
3835         ;;
3836     openbsd|bitrig)
3837         disable symver
3838         SHFLAGS='-shared'
3839         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3840         SLIB_INSTALL_LINKS=
3841         oss_indev_extralibs="-lossaudio"
3842         oss_outdev_extralibs="-lossaudio"
3843         ;;
3844     dragonfly)
3845         disable symver
3846         ;;
3847     freebsd)
3848         ;;
3849     bsd/os)
3850         add_extralibs -lpoll -lgnugetopt
3851         ;;
3852     darwin)
3853         enabled ppc && add_asflags -force_cpusubtype_ALL
3854         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3855         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3856         add_ldflags -Wl,-dynamic,-search_paths_first
3857         SLIBSUF=".dylib"
3858         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3859         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3860         objformat="macho"
3861         enabled x86_64 && objformat="macho64"
3862         enabled_any pic shared ||
3863             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3864         check_header dispatch/dispatch.h &&
3865             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3866         ;;
3867     msys*)
3868         die "Native MSYS builds are discouraged, please use the MINGW environment."
3869         ;;
3870     mingw32*|mingw64*)
3871         if test $target_os = "mingw32ce"; then
3872             disable network
3873         else
3874             target_os=mingw32
3875         fi
3876         LIBTARGET=i386
3877         if enabled x86_64; then
3878             LIBTARGET="i386:x86-64"
3879         elif enabled arm; then
3880             LIBTARGET=arm-wince
3881         fi
3882         check_ldflags -Wl,--nxcompat
3883         check_ldflags -Wl,--dynamicbase
3884         shlibdir_default="$bindir_default"
3885         SLIBPREF=""
3886         SLIBSUF=".dll"
3887         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3888         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3889         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3890         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3891         SLIB_INSTALL_LINKS=
3892         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3893         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3894         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3895         objformat="win32"
3896         dlltool="${cross_prefix}dlltool"
3897         ranlib=:
3898         enable dos_paths
3899         ;;
3900     win32|win64)
3901         disable symver
3902         if enabled shared; then
3903             # Link to the import library instead of the normal static library
3904             # for shared libs.
3905             LD_LIB='%.lib'
3906             # Cannot build both shared and static libs with MSVC or icl.
3907             disable static
3908         fi
3909         shlibdir_default="$bindir_default"
3910         SLIBPREF=""
3911         SLIBSUF=".dll"
3912         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3913         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3914         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3915         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3916         SLIB_INSTALL_LINKS=
3917         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3918         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3919         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3920         objformat="win32"
3921         ranlib=:
3922         enable dos_paths
3923         ;;
3924     cygwin*)
3925         target_os=cygwin
3926         shlibdir_default="$bindir_default"
3927         SLIBPREF="cyg"
3928         SLIBSUF=".dll"
3929         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3930         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3931         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3932         SLIB_INSTALL_LINKS=
3933         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3934         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3935         objformat="win32"
3936         enable dos_paths
3937         ;;
3938     *-dos|freedos|opendos)
3939         network_extralibs="-lsocket"
3940         objformat="coff"
3941         enable dos_paths
3942         add_cppflags -U__STRICT_ANSI__
3943         ;;
3944     linux)
3945         enable dv1394
3946         enable section_data_rel_ro
3947         ;;
3948     irix*)
3949         target_os=irix
3950         ranlib="echo ignoring ranlib"
3951         ;;
3952     os/2*)
3953         ln_s="cp -f"
3954         objformat="aout"
3955         add_cppflags -D_GNU_SOURCE
3956         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3957         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3958         LIBSUF="_s.a"
3959         SLIBPREF=""
3960         SLIBSUF=".dll"
3961         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3962         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3963         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3964             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3965             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3966             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3967             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3968         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3969             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3970         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3971         enable dos_paths
3972         ;;
3973     gnu/kfreebsd)
3974         add_cppflags -D_BSD_SOURCE
3975         ;;
3976     gnu)
3977         ;;
3978     qnx)
3979         add_cppflags -D_QNX_SOURCE
3980         network_extralibs="-lsocket"
3981         ;;
3982     symbian)
3983         SLIBSUF=".dll"
3984         enable dos_paths
3985         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3986         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3987         add_ldflags -Wl,--target1-abs,--no-undefined \
3988                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3989                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3990         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3991                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3992                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3993         ;;
3994     osf1)
3995         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3996         ;;
3997     minix)
3998         ;;
3999     none)
4000         ;;
4001     *)
4002         die "Unknown OS '$target_os'."
4003         ;;
4004 esac
4005
4006 # determine libc flavour
4007
4008 probe_libc(){
4009     pfx=$1
4010     pfx_no_=${pfx%_}
4011     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4012     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4013         eval ${pfx}libc_type=uclibc
4014         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4015     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4016         eval ${pfx}libc_type=glibc
4017         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4018     # MinGW headers can be installed on Cygwin, so check for newlib first.
4019     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4020         eval ${pfx}libc_type=newlib
4021         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4022     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4023     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4024         eval ${pfx}libc_type=mingw64
4025         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4026         eval test \$${pfx_no_}cc_type = "gcc" &&
4027             add_${pfx}cppflags -D__printf__=__gnu_printf__
4028     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4029          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4030         eval ${pfx}libc_type=mingw32
4031         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4032             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4033             die "ERROR: MinGW32 runtime version must be >= 3.15."
4034         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4035         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4036             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4037         eval test \$${pfx_no_}cc_type = "gcc" &&
4038             add_${pfx}cppflags -D__printf__=__gnu_printf__
4039     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4040         eval ${pfx}libc_type=msvcrt
4041         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4042             if [ "$pfx" = host_ ]; then
4043                 add_host_cppflags -Dsnprintf=_snprintf
4044             else
4045                 add_compat strtod.o strtod=avpriv_strtod
4046                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4047                                              _snprintf=avpriv_snprintf  \
4048                                              vsnprintf=avpriv_vsnprintf
4049             fi
4050         fi
4051         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4052         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4053         # 0x601 by default unless something else is set by the user.
4054         # This can easily lead to us detecting functions only present
4055         # in such new versions and producing binaries requiring windows 7.0.
4056         # Therefore explicitly set the default to XP unless the user has
4057         # set something else on the command line.
4058         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4059         # family. For these cases, configure is free to use any functions
4060         # found in the SDK headers by default. (Alternatively, we could force
4061         # _WIN32_WINNT to 0x0602 in that case.)
4062         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4063             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4064 #ifdef WINAPI_FAMILY
4065 #include <winapifamily.h>
4066 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4067 #error not desktop
4068 #endif
4069 #endif
4070 EOF
4071         if [ "$pfx" = "" ]; then
4072             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4073         fi
4074     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4075         eval ${pfx}libc_type=klibc
4076     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4077         eval ${pfx}libc_type=bionic
4078     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4079         eval ${pfx}libc_type=solaris
4080         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4081     else
4082         eval ${pfx}libc_type=default
4083         add_${pfx}cppflags -D_DEFAULT_SOURCE
4084     fi
4085 }
4086
4087 probe_libc
4088 test -n "$libc_type" && enable libc_$libc_type
4089 probe_libc host_
4090 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4091
4092 case $libc_type in
4093     bionic)
4094         add_compat strtod.o strtod=avpriv_strtod
4095         ;;
4096 esac
4097
4098 # hacks for compiler/libc/os combinations
4099
4100 if enabled_all tms470 libc_glibc; then
4101     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4102     add_cppflags -D__USER_LABEL_PREFIX__=
4103     add_cppflags -D__builtin_memset=memset
4104     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4105     add_cflags   -pds=48    # incompatible redefinition of macro
4106 fi
4107
4108 if enabled_all ccc libc_glibc; then
4109     add_ldflags -Wl,-z,now  # calls to libots crash without this
4110 fi
4111
4112 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4113     add_cppflags '-I\$(SRC_PATH)/compat/float'
4114
4115 esc(){
4116     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4117 }
4118
4119 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4120
4121 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4122
4123 set_default $PATHS_LIST
4124 set_default nm
4125
4126 # we need to build at least one lib type
4127 if ! enabled_any static shared; then
4128     cat <<EOF
4129 At least one library type must be built.
4130 Specify --enable-static to build the static libraries or --enable-shared to
4131 build the shared libraries as well. To only build the shared libraries specify
4132 --disable-static in addition to --enable-shared.
4133 EOF
4134     exit 1
4135 fi
4136
4137 disabled optimizations || check_cflags -fomit-frame-pointer
4138
4139 enable_weak_pic() {
4140     disabled pic && return
4141     enable pic
4142     add_cppflags -DPIC
4143     case "$target_os" in
4144     mingw*|cygwin*)
4145         ;;
4146     *)
4147         add_cflags -fPIC
4148         ;;
4149     esac
4150     add_asflags  -fPIC
4151 }
4152
4153 enabled pic && enable_weak_pic
4154
4155 check_cc <<EOF || die "Symbol mangling check failed."
4156 int ff_extern;
4157 EOF
4158 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4159 extern_prefix=${sym%%ff_extern*}
4160
4161 check_cc <<EOF && enable_weak inline_asm
4162 void foo(void) { __asm__ volatile ("" ::); }
4163 EOF
4164
4165 _restrict=
4166 for restrict_keyword in restrict __restrict__ __restrict; do
4167     check_cc <<EOF && _restrict=$restrict_keyword && break
4168 void foo(char * $restrict_keyword p);
4169 EOF
4170 done
4171
4172 check_cc <<EOF && enable pragma_deprecated
4173 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4174 EOF
4175
4176 check_cc <<EOF && enable attribute_packed
4177 struct { int x; } __attribute__((packed)) x;
4178 EOF
4179
4180 check_cc <<EOF && enable attribute_may_alias
4181 union { int x; } __attribute__((may_alias)) x;
4182 EOF
4183
4184 check_cc <<EOF || die "endian test failed"
4185 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4186 EOF
4187 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4188
4189 check_gas() {
4190     log "check_gas using '$as' as AS"
4191     # :vararg is used on aarch64, arm and ppc altivec
4192     check_as <<EOF || return 1
4193 .macro m n, y:vararg=0
4194 \n: .int \y
4195 .endm
4196 m x
4197 EOF
4198     # .altmacro is only used in arm asm
4199     ! enabled arm || check_as <<EOF || return 1
4200 .altmacro
4201 EOF
4202     enable gnu_as
4203     return 0
4204 }
4205
4206 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4207     nogas=:
4208     enabled_any arm aarch64 && nogas=die
4209     enabled_all ppc altivec && nogas=warn
4210     as_noop=-v
4211
4212     case $as_type in
4213         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4214         gcc)  gaspp_as_type=gas ;;
4215         *)    gaspp_as_type=$as_type ;;
4216     esac
4217
4218     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4219
4220     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4221         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4222
4223     if ! check_gas ; then
4224         as=${gas:=$as}
4225         check_gas || \
4226             $nogas "GNU assembler not found, install/update gas-preprocessor"
4227     fi
4228
4229     check_as <<EOF && enable as_func
4230 .func test
4231 .endfunc
4232 EOF
4233 fi
4234
4235 check_inline_asm inline_asm_labels '"1:\n"'
4236
4237 if enabled aarch64; then
4238     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4239     # internal assembler in clang 3.3 does not support this instruction
4240     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4241     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4242
4243     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4244
4245 elif enabled alpha; then
4246
4247     check_cflags -mieee
4248
4249 elif enabled arm; then
4250
4251     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4252     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4253     enabled thumb && check_cflags -mthumb || check_cflags -marm
4254
4255     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4256         enable vfp_args
4257     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4258         enable vfp_args
4259     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4260         case "${cross_prefix:-$cc}" in
4261             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4262             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4263 __asm__ (".eabi_attribute 28, 1");
4264 int main(void) { return 0; }
4265 EOF
4266         esac
4267         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4268     fi
4269
4270     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4271     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4272     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4273     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4274     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4275     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4276
4277     [ $target_os = linux ] || [ $target_os = android ] ||
4278         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4279             $ARCH_EXT_LIST_ARM
4280
4281     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4282
4283     check_as <<EOF && enable as_dn_directive
4284 ra .dn d0.i16
4285 .unreq ra
4286 EOF
4287     check_as <<EOF && enable as_fpu_directive
4288 .fpu neon
4289 EOF
4290
4291     # llvm's integrated assembler supports .object_arch from llvm 3.5
4292     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4293 .object_arch armv4
4294 EOF
4295
4296     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4297
4298 elif enabled mips; then
4299
4300     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4301
4302     # make sure that only an instruction set is enabled
4303     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4304
4305     if enabled mips64; then
4306         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4307             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4308                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4309     else
4310         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4311             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4312                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4313     fi
4314
4315 elif enabled parisc; then
4316
4317     if enabled gcc; then
4318         case $($cc -dumpversion) in
4319             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4320         esac
4321     fi
4322
4323 elif enabled ppc; then
4324
4325     enable local_aligned_8 local_aligned_16 local_aligned_32
4326
4327     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4328     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4329     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4330     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4331
4332     # AltiVec flags: The FSF version of GCC differs from the Apple version
4333     if enabled altivec; then
4334         check_cflags -maltivec -mabi=altivec &&
4335         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4336         check_cflags -faltivec
4337
4338         # check if our compiler supports Motorola AltiVec C API
4339         check_cc <<EOF || disable altivec
4340 $inc_altivec_h
4341 int main(void) {
4342     vector signed int v1 = (vector signed int) { 0 };
4343     vector signed int v2 = (vector signed int) { 1 };
4344     v1 = vec_add(v1, v2);
4345     return 0;
4346 }
4347 EOF
4348
4349         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4350     fi
4351
4352     if enabled vsx; then
4353         check_cflags -mvsx &&
4354         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4355     fi
4356
4357     if enabled power8; then
4358         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4359     fi
4360
4361 elif enabled x86; then
4362
4363     check_builtin rdtsc    intrin.h   "__rdtsc()"
4364     check_builtin mm_empty mmintrin.h "_mm_empty()"
4365
4366     enable local_aligned_8 local_aligned_16 local_aligned_32
4367
4368     # check whether EBP is available on x86
4369     # As 'i' is stored on the stack, this program will crash
4370     # if the base pointer is used to access it because the
4371     # base pointer is cleared in the inline assembly code.
4372     check_exec_crash <<EOF && enable ebp_available
4373 volatile int i=0;
4374 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4375 return i;
4376 EOF
4377
4378     # check whether EBX is available on x86
4379     check_inline_asm ebx_available '""::"b"(0)' &&
4380         check_inline_asm ebx_available '"":::"%ebx"'
4381
4382     # check whether xmm clobbers are supported
4383     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4384
4385     # check whether binutils is new enough to compile SSSE3/MMXEXT
4386     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4387     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4388
4389     if ! disabled_any asm mmx yasm; then
4390         if check_cmd $yasmexe --version; then
4391             enabled x86_64 && yasm_extra="-m amd64"
4392             yasm_debug="-g dwarf2"
4393         elif check_cmd nasm -v; then
4394             yasmexe=nasm
4395             yasm_debug="-g -F dwarf"
4396             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4397         fi
4398
4399         YASMFLAGS="-f $objformat $yasm_extra"
4400         enabled pic               && append YASMFLAGS "-DPIC"
4401         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4402         case "$objformat" in
4403             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4404         esac
4405
4406         check_yasm "movbe ecx, [5]" && enable yasm ||
4407             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4408         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4409         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4410         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4411         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4412         check_yasm "CPU amdnop" || disable cpunop
4413     fi
4414
4415     case "$cpu" in
4416         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4417             disable fast_clz
4418         ;;
4419     esac
4420
4421 fi
4422
4423 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4424
4425 check_ldflags -Wl,--as-needed
4426
4427 if check_func dlopen; then
4428     ldl=
4429 elif check_func dlopen -ldl; then
4430     ldl=-ldl
4431 fi
4432
4433 if ! disabled network; then
4434     check_func getaddrinfo $network_extralibs
4435     check_func inet_aton $network_extralibs
4436
4437     check_type netdb.h "struct addrinfo"
4438     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4439     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4440     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4441     check_type poll.h "struct pollfd"
4442     check_type netinet/sctp.h "struct sctp_event_subscribe"
4443     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4444     check_type netinet/in.h "struct sockaddr_in6"
4445     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4446     check_type "sys/types.h sys/socket.h" socklen_t
4447
4448     # Prefer arpa/inet.h over winsock2
4449     if check_header arpa/inet.h ; then
4450         check_func closesocket
4451     elif check_header winsock2.h ; then
4452         check_func_headers winsock2.h closesocket -lws2 &&
4453             network_extralibs="-lws2" ||
4454         { check_func_headers winsock2.h closesocket -lws2_32 &&
4455             network_extralibs="-lws2_32"; } || disable winsock2_h network
4456         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4457
4458         check_type ws2tcpip.h socklen_t
4459         check_type ws2tcpip.h "struct addrinfo"
4460         check_type ws2tcpip.h "struct group_source_req"
4461         check_type ws2tcpip.h "struct ip_mreq_source"
4462         check_type ws2tcpip.h "struct ipv6_mreq"
4463         check_type winsock2.h "struct pollfd"
4464         check_struct winsock2.h "struct sockaddr" sa_len
4465         check_type ws2tcpip.h "struct sockaddr_in6"
4466         check_type ws2tcpip.h "struct sockaddr_storage"
4467     else
4468         disable network
4469     fi
4470 fi
4471
4472 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4473 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4474 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4475 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4476
4477 case "$custom_allocator" in
4478     jemalloc)
4479         # jemalloc by default does not use a prefix
4480         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4481     ;;
4482     tcmalloc)
4483         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4484         malloc_prefix=tc_
4485     ;;
4486 esac
4487
4488 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4489 check_func  ${malloc_prefix}memalign            && enable memalign
4490 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4491
4492 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4493     check_func_headers time.h clock_gettime ||
4494         { check_lib time.h clock_gettime -lrt && LIBRT="-lrt"; }
4495
4496 check_func  fcntl
4497 check_func  fork
4498 check_func  gethrtime
4499 check_func  getopt
4500 check_func  getrusage
4501 check_func  gettimeofday
4502 check_func  gmtime_r
4503 check_func  isatty
4504 check_func  localtime_r
4505 check_func  mach_absolute_time
4506 check_func  mkstemp
4507 check_func  mmap
4508 check_func  mprotect
4509 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4510 check_func_headers time.h nanosleep || check_lib time.h nanosleep -lrt
4511 check_func  sched_getaffinity
4512 check_func  setrlimit
4513 check_func  strerror_r
4514 check_func  sysconf
4515 check_func  sysctl
4516 check_func  usleep
4517
4518 check_func_headers io.h setmode
4519 check_func_headers stdlib.h getenv
4520
4521 check_func_headers windows.h GetProcessAffinityMask
4522 check_func_headers windows.h GetProcessTimes
4523 check_func_headers windows.h GetSystemTimeAsFileTime
4524 check_func_headers windows.h LoadLibrary
4525 check_func_headers windows.h MapViewOfFile
4526 check_func_headers windows.h SetConsoleTextAttribute
4527 check_func_headers windows.h Sleep
4528 check_func_headers windows.h VirtualAlloc
4529 check_struct windows.h "CONDITION_VARIABLE" Ptr
4530
4531 check_header direct.h
4532 check_header dlfcn.h
4533 check_header d3d11.h
4534 check_header dxva.h
4535 check_header dxva2api.h
4536 check_header io.h
4537 check_header mach/mach_time.h
4538 check_header malloc.h
4539 check_header poll.h
4540 check_header sys/mman.h
4541 check_header sys/param.h
4542 check_header sys/resource.h
4543 check_header sys/select.h
4544 check_header sys/time.h
4545 check_header sys/un.h
4546 check_header unistd.h
4547 check_header valgrind/valgrind.h
4548 check_header VideoDecodeAcceleration/VDADecoder.h
4549 check_header windows.h
4550 check_header X11/extensions/XvMClib.h
4551
4552 # it seems there are versions of clang in some distros that try to use the
4553 # gcc headers, which explodes for stdatomic
4554 # so we also check that atomics actually work here
4555 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4556
4557 check_lib "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4558 check_lib "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4559 check_lib "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4560
4561 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4562
4563 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4564 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4565 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4566
4567 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4568 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4569 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4570 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4571 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4572
4573 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4574
4575 if ! disabled w32threads && ! enabled pthreads; then
4576     check_func_headers "windows.h process.h" _beginthreadex &&
4577         enable w32threads || disable w32threads
4578 fi
4579
4580 # check for some common methods of building with pthread support
4581 # do this before the optional library checks as some of them require pthreads
4582 if ! disabled pthreads && ! enabled w32threads; then
4583     enable pthreads
4584     if check_lib pthread.h pthread_join -pthread; then
4585         add_cflags -pthread
4586     elif check_lib pthread.h pthread_join -pthreads; then
4587         add_cflags -pthreads
4588     elif check_lib pthread.h pthread_join -lpthreadGC2; then
4589         :
4590     elif check_lib pthread.h pthread_join -lpthread; then
4591         :
4592     elif ! check_func pthread_join; then
4593         disable pthreads
4594     fi
4595 fi
4596
4597 enabled pthreads &&
4598     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4599
4600 disabled  zlib || check_lib  zlib.h      zlibVersion -lz   || disable  zlib
4601 disabled bzlib || check_lib bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4602
4603 check_lib math.h sin -lm && LIBM="-lm"
4604
4605 atan2f_args=2
4606 ldexpf_args=2
4607 powf_args=2
4608
4609 for func in $MATH_FUNCS; do
4610     eval check_mathfunc $func \${${func}_args:-1} $LIBM
4611 done
4612
4613 # these are off by default, so fail if requested and not available
4614 enabled avisynth          && { check_header avisynth/avisynth_c.h || die "ERROR: avisynth/avisynth_c.h header not found"; }
4615 enabled avxsynth          && require avxsynth "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl
4616 enabled cuda              && require cuda cuda.h cuInit -lcuda
4617 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4618 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4619 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4620 enabled libdc1394         && require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new
4621 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4622 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4623 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4624 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4625 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4626 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4627                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4628                                done || die "ERROR: libgsm not found"; }
4629 enabled libhdcd           && require_pkg_config libhdcd "hdcd/hdcd_simple.h" hdcd_new
4630 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4631 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4632 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4633 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4634 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4635 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4636 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4637 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4638 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4639 enabled libopenjpeg       && { check_lib openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4640                                require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4641 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4642 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4643 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4644 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4645 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4646 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4647 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4648 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4649 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4650 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4651 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4652 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4653     enabled libvpx_vp8_decoder && {
4654         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4655             disable libvpx_vp8_decoder;
4656     }
4657     enabled libvpx_vp8_encoder && {
4658         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4659             disable libvpx_vp8_encoder;
4660     }
4661     enabled libvpx_vp9_decoder && {
4662         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4663             disable libvpx_vp9_decoder;
4664     }
4665     enabled libvpx_vp9_encoder && {
4666         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4667             disable libvpx_vp9_encoder;
4668     }
4669     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4670         die "libvpx enabled but no supported decoders found"
4671     fi
4672 }
4673 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4674 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4675 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4676                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4677                                die "ERROR: libx264 version must be >= 0.118."; } &&
4678                              { check_cpp_condition x264.h "X264_MPEG2" &&
4679                                enable libx262; }
4680 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4681                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4682                                die "ERROR: libx265 version must be >= 57."; }
4683 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4684 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4685 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4686                                { ! enabled cross_compile &&
4687                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4688                                  add_ldflags -L/opt/vc/lib/ &&
4689                                  check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4690                                die "ERROR: mmal not found" &&
4691                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4692 enabled omx_rpi           && { check_header OMX_Core.h ||
4693                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4694                                die "ERROR: OpenMAX IL headers not found"; }
4695 enabled omx               && { check_header OMX_Core.h || die "ERROR: OpenMAX IL headers not found"; }
4696 enabled openssl           && { { check_pkg_config openssl openssl/ssl.h OPENSSL_init_ssl ||
4697                                  check_pkg_config openssl openssl/ssl.h SSL_library_init; } && {
4698                                add_cflags $openssl_cflags && add_extralibs $openssl_extralibs; } ||
4699                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4700                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4701                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4702                                die "ERROR: openssl not found"; }
4703
4704 enabled gnutls            && check_lib gmp.h mpz_export -lgmp && enable gmp
4705
4706 if enabled nvenc; then
4707     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4708     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6" ||
4709         die "ERROR: NVENC API version 5 or older is not supported"
4710 fi
4711
4712 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4713     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4714     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4715     enable sdl
4716 fi
4717
4718 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4719 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4720
4721 check_header linux/fb.h
4722 check_header linux/videodev2.h
4723 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4724
4725 check_header AVFoundation/AVFoundation.h
4726
4727 check_header sys/videoio.h
4728
4729 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4730 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4731 # w32api 3.12 had it defined wrong
4732 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4733
4734 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4735 { check_header dev/bktr/ioctl_meteor.h &&
4736   check_header dev/bktr/ioctl_bt848.h; } ||
4737 { check_header machine/ioctl_meteor.h &&
4738   check_header machine/ioctl_bt848.h; } ||
4739 { check_header dev/video/meteor/ioctl_meteor.h &&
4740   check_header dev/video/bktr/ioctl_bt848.h; } ||
4741 check_header dev/ic/bt8xx.h
4742
4743 check_header sys/soundcard.h
4744 check_header soundcard.h
4745
4746 enabled_any alsa_indev alsa_outdev &&
4747     check_lib alsa/asoundlib.h snd_pcm_htimestamp -lasound
4748
4749 enabled jack_indev && check_lib jack/jack.h jack_client_open -ljack &&
4750     check_func jack_port_get_latency_range -ljack
4751
4752 enabled_any sndio_indev sndio_outdev && check_lib sndio.h sio_open -lsndio
4753
4754 if enabled libcdio; then
4755     check_lib "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4756     check_lib "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4757     die "ERROR: No usable libcdio/cdparanoia found"
4758 fi
4759
4760 if enabled libxcb; then
4761     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4762         enabled libxcb && die "ERROR: libxcb not found";
4763     } && enable libxcb
4764
4765     disabled libxcb_shm ||
4766         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4767             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4768         } && check_header sys/shm.h && enable libxcb_shm
4769
4770     disabled libxcb_xfixes ||
4771         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4772             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4773         } && enable libxcb_xfixes
4774
4775     add_cflags "$xcb_shape_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4776     add_extralibs "$xcb_shape_extralibs $xcb_shm_extralibs $xcb_xfixes_extralibs"
4777 fi
4778
4779 enabled dxva2 &&
4780     check_lib windows.h CoTaskMemFree -lole32 &&
4781     enable dxva2_lib
4782
4783 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4784
4785 enabled vaapi &&
4786     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4787     disable vaapi
4788
4789 enabled vaapi &&
4790     check_lib "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4791     enable vaapi_drm
4792
4793 enabled vaapi &&
4794     check_lib "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11 &&
4795     enable vaapi_x11
4796
4797 enabled vdpau &&
4798     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4799     disable vdpau
4800
4801 enabled vdpau &&
4802     check_lib "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11 &&
4803     enable vdpau_x11
4804
4805 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4806
4807 # add some useful compiler flags if supported
4808 check_cflags -Wdeclaration-after-statement
4809 check_cflags -Wall
4810 check_cflags -Wdisabled-optimization
4811 check_cflags -Wpointer-arith
4812 check_cflags -Wredundant-decls
4813 check_cflags -Wwrite-strings
4814 check_cflags -Wtype-limits
4815 check_cflags -Wundef
4816 check_cflags -Wmissing-prototypes
4817 check_cflags -Wstrict-prototypes
4818
4819 if enabled extra_warnings; then
4820     check_cflags -Wcast-qual
4821     check_cflags -Wextra
4822     check_cflags -Wpedantic
4823 fi
4824
4825 check_disable_warning(){
4826     warning_flag=-W${1#-Wno-}
4827     test_cflags $warning_flag && add_cflags $1
4828 }
4829
4830 check_disable_warning -Wno-parentheses
4831 check_disable_warning -Wno-switch
4832 check_disable_warning -Wno-format-zero-length
4833 check_disable_warning -Wno-pointer-sign
4834
4835 check_disable_warning_headers(){
4836     warning_flag=-W${1#-Wno-}
4837     test_cflags $warning_flag && add_cflags_headers $1
4838 }
4839
4840 check_disable_warning_headers -Wno-deprecated-declarations
4841 check_disable_warning_headers -Wno-unused-variable
4842
4843 check_objcflags -fobjc-arc && enable objc_arc
4844
4845 # add some linker flags
4846 check_ldflags -Wl,--warn-common
4847 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4848 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4849 test_ldflags -Wl,-Bsymbolic