build: Rename host_libs/HOSTLIBS variables to host_extralibs/HOSTEXTRALIBS
[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}_libs"   $pkg_libs
1028 }
1029
1030 check_exec(){
1031     check_ld "$@" && { 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}_libs")
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 delogo_filter_deps="gpl"
2440 drawtext_filter_deps="libfreetype"
2441 frei0r_filter_deps="frei0r dlopen"
2442 frei0r_filter_extralibs='$ldl'
2443 frei0r_src_filter_deps="frei0r dlopen"
2444 frei0r_src_filter_extralibs='$ldl'
2445 hdcd_filter_deps="libhdcd"
2446 hqdn3d_filter_deps="gpl"
2447 interlace_filter_deps="gpl"
2448 movie_filter_deps="avcodec avformat"
2449 ocv_filter_deps="libopencv"
2450 resample_filter_deps="avresample"
2451 scale_filter_deps="swscale"
2452 scale_qsv_filter_deps="libmfx"
2453 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2454
2455 # examples
2456 decode_audio_example_deps="avcodec avutil"
2457 decode_video_example_deps="avcodec avutil"
2458 encode_audio_example_deps="avcodec avutil"
2459 encode_video_example_deps="avcodec avutil"
2460 filter_audio_example_deps="avfilter avutil"
2461 metadata_example_deps="avformat avutil"
2462 output_example_deps="avcodec avformat avresample avutil swscale"
2463 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2464 transcode_aac_example_deps="avcodec avformat avresample"
2465
2466 # libraries, in linking order
2467 avcodec_deps="avutil"
2468 avdevice_deps="avformat avcodec avutil"
2469 avfilter_deps="avutil"
2470 avformat_deps="avcodec avutil"
2471 avresample_deps="avutil"
2472 swscale_deps="avutil"
2473
2474 # programs
2475 avconv_deps="avcodec avfilter avformat avresample swscale"
2476 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2477                fps_filter null_filter resample_filter scale_filter
2478                trim_filter"
2479 avplay_deps="avcodec avfilter avformat avresample sdl"
2480 avplay_libs='$sdl_libs'
2481 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2482 avprobe_deps="avcodec avformat"
2483
2484 # documentation
2485 pod2man_deps="doc"
2486 texi2html_deps="doc"
2487
2488 # default parameters
2489
2490 logfile="config.log"
2491
2492 # installation paths
2493 prefix_default="/usr/local"
2494 bindir_default='${prefix}/bin'
2495 datadir_default='${prefix}/share/avconv'
2496 docdir_default='${prefix}/share/doc/libav'
2497 incdir_default='${prefix}/include'
2498 libdir_default='${prefix}/lib'
2499 mandir_default='${prefix}/share/man'
2500 shlibdir_default="$libdir_default"
2501
2502 # toolchain
2503 ar_default="ar"
2504 cc_default="gcc"
2505 host_cc_default="gcc"
2506 ln_s="ln -s -f"
2507 nm_default="nm -g"
2508 objformat="elf"
2509 pkg_config_default=pkg-config
2510 ranlib="ranlib"
2511 strip="strip"
2512 version_script='--version-script'
2513 yasmexe="yasm"
2514
2515 # machine
2516 arch_default=$(uname -m)
2517 cpu="generic"
2518 intrinsics="none"
2519
2520 # OS
2521 target_os_default=$(tolower $(uname -s))
2522 host_os=$target_os_default
2523
2524 # configurable options
2525 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2526
2527 enable asm
2528 enable debug
2529 enable doc
2530 enable faan faandct faanidct
2531 enable optimizations
2532 enable safe_bitstream_reader
2533 enable static
2534 enable swscale_alpha
2535 enable valgrind_backtrace
2536
2537 # By default, enable only those hwaccels that have no external dependencies.
2538 enable d3d11va dxva2 vda vdpau
2539
2540 # build settings
2541 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2542 LIBPREF="lib"
2543 LIBSUF=".a"
2544 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2545 SLIBPREF="lib"
2546 SLIBSUF=".so"
2547 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2548 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2549 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2550 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2551 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2552 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2553 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2554
2555 asflags_filter=echo
2556 cflags_filter=echo
2557 ldflags_filter=echo
2558
2559 AS_C='-c'
2560 AS_O='-o $@'
2561 CC_C='-c'
2562 CC_E='-E -o $@'
2563 CC_O='-o $@'
2564 OBJCC_C='-c'
2565 OBJCC_E='-E -o $@'
2566 OBJCC_O='-o $@'
2567 LD_O='-o $@'
2568 LD_LIB='-l%'
2569 LD_PATH='-L'
2570 HOSTCC_C='-c'
2571 HOSTCC_E='-E -o $@'
2572 HOSTCC_O='-o $@'
2573 HOSTLD_O='-o $@'
2574
2575 host_extralibs='-lm'
2576 host_cflags_filter=echo
2577 host_ldflags_filter=echo
2578
2579 target_path='$(CURDIR)'
2580
2581 # since the object filename is not given with the -MM flag, the compiler
2582 # is only able to print the basename, and we must add the path ourselves
2583 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2584 DEPFLAGS='-MM'
2585
2586 # find source path
2587 if test -f configure; then
2588     source_path=.
2589 else
2590     source_path=$(cd $(dirname "$0"); pwd)
2591     echo "$source_path" | grep -q '[[:blank:]]' &&
2592         die "Out of tree builds are impossible with whitespace in source path."
2593     test -e "$source_path/config.h" &&
2594         die "Out of tree builds are impossible with config.h in source dir."
2595 fi
2596
2597 for v in "$@"; do
2598     r=${v#*=}
2599     l=${v%"$r"}
2600     r=$(sh_quote "$r")
2601     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2602 done
2603
2604 find_things(){
2605     thing=$1
2606     pattern=$2
2607     file=$source_path/$3
2608     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2609 }
2610
2611 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2612 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2613 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2614 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2615 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2616 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2617 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2618 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2619 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2620
2621 find_things_extern(){
2622     thing=$1
2623     pattern=$2
2624     file=$source_path/$3
2625     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2626 }
2627
2628 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2629 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2630
2631 ALL_COMPONENTS="
2632     $BSF_LIST
2633     $DECODER_LIST
2634     $DEMUXER_LIST
2635     $ENCODER_LIST
2636     $FILTER_LIST
2637     $HWACCEL_LIST
2638     $INDEV_LIST
2639     $MUXER_LIST
2640     $OUTDEV_LIST
2641     $PARSER_LIST
2642     $PROTOCOL_LIST
2643 "
2644
2645 for n in $COMPONENT_LIST; do
2646     v=$(toupper ${n%s})_LIST
2647     eval enable \$$v
2648     eval ${n}_if_any="\$$v"
2649 done
2650
2651 enable $ARCH_EXT_LIST
2652
2653 die_unknown(){
2654     echo "Unknown option \"$1\"."
2655     echo "See $0 --help for available options."
2656     exit 1
2657 }
2658
2659 print_3_columns() {
2660     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2661 }
2662
2663 show_list() {
2664     suffix=_$1
2665     shift
2666     echo $* | sed s/$suffix//g | print_3_columns
2667     exit 0
2668 }
2669
2670 rand_list(){
2671     IFS=', '
2672     set -- $*
2673     unset IFS
2674     for thing; do
2675         comp=${thing%:*}
2676         prob=${thing#$comp}
2677         prob=${prob#:}
2678         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2679         echo "prob ${prob:-0.5}"
2680         printf '%s\n' $comp
2681     done
2682 }
2683
2684 do_random(){
2685     action=$1
2686     shift
2687     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2688     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2689 }
2690
2691 for opt do
2692     optval="${opt#*=}"
2693     case "$opt" in
2694         --extra-ldflags=*)
2695             add_ldflags $optval
2696         ;;
2697         --extra-ldexeflags=*)
2698             add_ldexeflags $optval
2699         ;;
2700         --extra-libs=*)
2701             add_extralibs $optval
2702         ;;
2703         --disable-devices)
2704             disable $INDEV_LIST $OUTDEV_LIST
2705         ;;
2706         --enable-debug=*)
2707             debuglevel="$optval"
2708         ;;
2709         --disable-programs)
2710             disable $PROGRAM_LIST
2711         ;;
2712         --disable-everything)
2713             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2714         ;;
2715         --disable-all)
2716             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2717             disable $LIBRARY_LIST $PROGRAM_LIST doc
2718         ;;
2719         --enable-random|--disable-random)
2720             action=${opt%%-random}
2721             do_random ${action#--} $COMPONENT_LIST
2722         ;;
2723         --enable-random=*|--disable-random=*)
2724             action=${opt%%-random=*}
2725             do_random ${action#--} $optval
2726         ;;
2727         --enable-*=*|--disable-*=*)
2728             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2729             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2730             eval list=\$$(toupper $thing)_LIST
2731             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2732             $action $(filter "$name" $list)
2733         ;;
2734         --enable-avserver|--disable-avserver*)
2735             warn "avserver has been removed, the ${opt} option is only"\
2736                  "provided for compatibility and will be removed in the future"
2737         ;;
2738         --enable-?*|--disable-?*)
2739             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2740             if is_in $option $COMPONENT_LIST; then
2741                 test $action = disable && action=unset
2742                 eval $action \$$(toupper ${option%s})_LIST
2743             elif is_in $option $CMDLINE_SELECT; then
2744                 $action $option
2745             else
2746                 die_unknown $opt
2747             fi
2748         ;;
2749         --list-*)
2750             NAME="${opt#--list-}"
2751             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2752             NAME=${NAME%s}
2753             eval show_list $NAME \$$(toupper $NAME)_LIST
2754         ;;
2755         --help|-h) show_help
2756         ;;
2757         --quiet|-q) quiet=yes
2758         ;;
2759         *)
2760             optname="${opt%%=*}"
2761             optname="${optname#--}"
2762             optname=$(echo "$optname" | sed 's/-/_/g')
2763             if is_in $optname $CMDLINE_SET; then
2764                 eval $optname='$optval'
2765             elif is_in $optname $CMDLINE_APPEND; then
2766                 append $optname "$optval"
2767             else
2768                 die_unknown $opt
2769             fi
2770         ;;
2771     esac
2772 done
2773
2774 for e in $env; do
2775     eval "export $e"
2776 done
2777
2778 disabled logging && logfile=/dev/null
2779
2780 # Die early if licensing-related configure options are incompatible.
2781 die_license_disabled() {
2782     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2783 }
2784
2785 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2786 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2787 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2788
2789 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2790
2791 # Disable all the library-specific components if the library itself
2792 # is disabled, see AVCODEC_LIST and following _LIST variables.
2793
2794 disable_components(){
2795     disabled ${1} && disable $(
2796         eval components="\$$(toupper ${1})_COMPONENTS"
2797         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2798     )
2799 }
2800
2801 map 'disable_components $v' $LIBRARY_LIST
2802
2803 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2804 set >> $logfile
2805
2806 case "$toolchain" in
2807     *-asan)
2808         cc_default="${toolchain%-asan}"
2809         add_cflags  -fsanitize=address
2810         add_ldflags -fsanitize=address
2811     ;;
2812     *-msan)
2813         cc_default="${toolchain%-msan}"
2814         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2815         add_ldflags -fsanitize=memory
2816     ;;
2817     *-tsan)
2818         cc_default="${toolchain%-tsan}"
2819         add_cflags  -fsanitize=thread -fPIE
2820         add_ldflags -fsanitize=thread -pie
2821         case "$toolchain" in
2822             gcc-tsan)
2823                 add_cflags  -fPIC
2824                 add_ldflags -fPIC
2825                 ;;
2826         esac
2827     ;;
2828     *-usan)
2829         cc_default="${toolchain%-usan}"
2830         add_cflags  -fsanitize=undefined
2831         add_ldflags -fsanitize=undefined
2832         case "$toolchain" in
2833             clang-usan)
2834                 add_cflags -O1
2835                 ;;
2836         esac
2837     ;;
2838     valgrind-*)
2839         target_exec_default="valgrind"
2840         case "$toolchain" in
2841             valgrind-massif)
2842                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2843                 ;;
2844             valgrind-memcheck)
2845                 target_exec_args="--track-origins=yes --leak-check=full"
2846                 ;;
2847         esac
2848     ;;
2849     msvc)
2850         # Check whether the current MSVC version needs the C99 converter.
2851         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2852         # support enough of C99 to build libav. Default to the new
2853         # behaviour if the regexp was unable to match anything, since this
2854         # successfully parses the version number of existing supported
2855         # versions that require the converter (MSVC 2010 and 2012).
2856         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2857         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2858             cc_default="cl"
2859         else
2860             cc_default="c99wrap cl"
2861         fi
2862         ld_default="$source_path/compat/windows/mslink"
2863         nm_default="dumpbin -symbols"
2864         ar_default="lib"
2865         case "$arch" in
2866         arm*)
2867             as_default="armasm"
2868             ;;
2869         esac
2870         target_os_default="win32"
2871         # Use a relative path for TMPDIR. This makes sure all the
2872         # ffconf temp files are written with a relative path, avoiding
2873         # issues with msys/win32 path conversion for MSVC parameters
2874         # such as -Fo<file> or -out:<file>.
2875         TMPDIR=.
2876     ;;
2877     icl)
2878         cc_default="icl"
2879         ld_default="xilink"
2880         nm_default="dumpbin -symbols"
2881         ar_default="xilib"
2882         target_os_default="win32"
2883         TMPDIR=.
2884     ;;
2885     gcov)
2886         add_cflags  -fprofile-arcs -ftest-coverage
2887         add_ldflags -fprofile-arcs -ftest-coverage
2888     ;;
2889     llvm-cov)
2890         add_cflags -fprofile-arcs -ftest-coverage
2891         add_ldflags --coverage
2892     ;;
2893     hardened)
2894         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2895         add_cflags   -fno-strict-overflow -fstack-protector-all
2896         add_ldflags  -Wl,-z,relro -Wl,-z,now
2897     ;;
2898     ?*)
2899         die "Unknown toolchain $toolchain"
2900     ;;
2901 esac
2902
2903 test -n "$cross_prefix" && enable cross_compile
2904
2905 if enabled cross_compile; then
2906     test -n "$arch" && test -n "$target_os" ||
2907         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2908 fi
2909
2910 ar_default="${cross_prefix}${ar_default}"
2911 cc_default="${cross_prefix}${cc_default}"
2912 occ_default="${cross_prefix}${occ_default}"
2913 nm_default="${cross_prefix}${nm_default}"
2914 pkg_config_default="${cross_prefix}${pkg_config_default}"
2915 ranlib="${cross_prefix}${ranlib}"
2916 strip="${cross_prefix}${strip}"
2917
2918 sysinclude_default="${sysroot}/usr/include"
2919
2920 set_default arch cc pkg_config sysinclude target_exec target_os
2921 enabled cross_compile || host_cc_default=$cc
2922 set_default host_cc
2923
2924 if ! $pkg_config --version >/dev/null 2>&1; then
2925     warn "$pkg_config not found, library detection may fail."
2926     pkg_config=false
2927 fi
2928
2929 exesuf() {
2930     case $1 in
2931         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2932     esac
2933 }
2934
2935 EXESUF=$(exesuf $target_os)
2936 HOSTEXESUF=$(exesuf $host_os)
2937
2938 # set temporary file name
2939 : ${TMPDIR:=$TEMPDIR}
2940 : ${TMPDIR:=$TMP}
2941 : ${TMPDIR:=/tmp}
2942
2943 if ! check_cmd mktemp -u XXXXXX; then
2944     # simple replacement for missing mktemp
2945     # NOT SAFE FOR GENERAL USE
2946     mktemp(){
2947         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2948     }
2949 fi
2950
2951 tmpfile(){
2952     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2953         (set -C; exec > $tmp) 2>/dev/null ||
2954         die "Unable to create temporary file in $TMPDIR."
2955     append TMPFILES $tmp
2956     eval $1=$tmp
2957 }
2958
2959 trap 'rm -f -- $TMPFILES' EXIT
2960
2961 tmpfile TMPASM .asm
2962 tmpfile TMPC   .c
2963 tmpfile TMPE   $EXESUF
2964 tmpfile TMPH   .h
2965 tmpfile TMPO   .o
2966 tmpfile TMPS   .S
2967 tmpfile TMPSH  .sh
2968 tmpfile TMPV   .ver
2969
2970 unset -f mktemp
2971
2972 chmod +x $TMPE
2973
2974 # make sure we can execute files in $TMPDIR
2975 cat > $TMPSH 2>> $logfile <<EOF
2976 #! /bin/sh
2977 EOF
2978 chmod +x $TMPSH >> $logfile 2>&1
2979 if ! $TMPSH >> $logfile 2>&1; then
2980     cat <<EOF
2981 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2982 variable to another directory and make sure that it is not mounted noexec.
2983 EOF
2984     die "Sanity test failed."
2985 fi
2986
2987 armasm_flags(){
2988     for flag; do
2989         case $flag in
2990             # Filter out MSVC cl.exe options from cflags that shouldn't
2991             # be passed to gas-preprocessor
2992             -M[TD]*)                                            ;;
2993             *)                  echo $flag                      ;;
2994         esac
2995    done
2996 }
2997
2998 ccc_flags(){
2999     for flag; do
3000         case $flag in
3001             -std=c99)           echo -c99                       ;;
3002             -mcpu=*)            echo -arch ${flag#*=}           ;;
3003             -mieee)             echo -ieee                      ;;
3004             -O*|-fast)          echo $flag                      ;;
3005             -fno-math-errno)    echo -assume nomath_errno       ;;
3006             -g)                 echo -g3                        ;;
3007             -Wall)              echo -msg_enable level2         ;;
3008             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3009             -Wl,*)              echo $flag                      ;;
3010             -f*|-W*)                                            ;;
3011             *)                  echo $flag                      ;;
3012         esac
3013    done
3014 }
3015
3016 cparser_flags(){
3017     for flag; do
3018         case $flag in
3019             -Wno-switch)             echo -Wno-switch-enum ;;
3020             -Wno-format-zero-length) ;;
3021             -Wdisabled-optimization) ;;
3022             -Wno-pointer-sign)       echo -Wno-other ;;
3023             *)                       echo $flag ;;
3024         esac
3025     done
3026 }
3027
3028 msvc_common_flags(){
3029     for flag; do
3030         case $flag in
3031             # In addition to specifying certain flags under the compiler
3032             # specific filters, they must be specified here as well or else the
3033             # generic catch all at the bottom will print the original flag.
3034             -Wall)                ;;
3035             -std=c99)             ;;
3036             # Common flags
3037             -fomit-frame-pointer) ;;
3038             -g)                   echo -Z7 ;;
3039             -fno-math-errno)      ;;
3040             -fno-common)          ;;
3041             -fno-signed-zeros)    ;;
3042             -fPIC)                ;;
3043             -mthumb)              ;;
3044             -march=*)             ;;
3045             -lz)                  echo zlib.lib ;;
3046             -lavicap32)           echo vfw32.lib user32.lib ;;
3047             -lx264)               echo libx264.lib ;;
3048             -l*)                  echo ${flag#-l}.lib ;;
3049             -L*)                  echo -libpath:${flag#-L} ;;
3050             *)                    echo $flag ;;
3051         esac
3052     done
3053 }
3054
3055 msvc_flags(){
3056     msvc_common_flags "$@"
3057     for flag; do
3058         case $flag in
3059             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3060                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3061                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3062                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3063         esac
3064     done
3065 }
3066
3067 icl_flags(){
3068     msvc_common_flags "$@"
3069     for flag; do
3070         case $flag in
3071             # Despite what Intel's documentation says -Wall, which is supported
3072             # on Windows, does enable remarks so disable them here.
3073             -Wall)                echo $flag -Qdiag-disable:remark ;;
3074             -std=c99)             echo -Qstd=c99 ;;
3075         esac
3076     done
3077 }
3078
3079 pgi_flags(){
3080     for flag; do
3081         case $flag in
3082             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3083             -fomit-frame-pointer) echo -Mnoframe ;;
3084             -g)                   echo -gopt ;;
3085             *)                    echo $flag ;;
3086         esac
3087     done
3088 }
3089
3090 suncc_flags(){
3091     for flag; do
3092         case $flag in
3093             -march=*|-mcpu=*)
3094                 case "${flag#*=}" in
3095                     native)                   echo -xtarget=native       ;;
3096                     v9|niagara)               echo -xarch=sparc          ;;
3097                     ultrasparc)               echo -xarch=sparcvis       ;;
3098                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3099                     i586|pentium)             echo -xchip=pentium        ;;
3100                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3101                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3102                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3103                     pentium4*)          echo -xtarget=pentium4           ;;
3104                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3105                     *-sse3)             echo -xarch=sse3                 ;;
3106                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3107                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3108                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3109                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3110                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3111                     k8|opteron|athlon64|athlon-fx)
3112                                                echo -xarch=sse2a         ;;
3113                     athlon*)                   echo -xarch=pentium_proa  ;;
3114                 esac
3115                 ;;
3116             -std=c99)             echo -xc99              ;;
3117             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3118             -fPIC)                echo -KPIC -xcode=pic32 ;;
3119             -W*,*)                echo $flag              ;;
3120             -f*-*|-W*|-mimpure-text)                      ;;
3121             -shared)              echo -G                 ;;
3122             *)                    echo $flag              ;;
3123         esac
3124     done
3125 }
3126
3127 tms470_flags(){
3128     for flag; do
3129         case $flag in
3130             -march=*|-mcpu=*)
3131                 case "${flag#*=}" in
3132                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3133                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3134                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3135                     armv6*|arm11*)          echo -mv=6   ;;
3136                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3137                                             echo -mv=5e  ;;
3138                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3139                 esac
3140                 ;;
3141             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3142             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3143             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3144             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3145             -msoft-float)   echo --float_support=vfplib       ;;
3146             -O[0-3]|-mf=*)  echo $flag                        ;;
3147             -g)             echo -g -mn                       ;;
3148             -pds=*)         echo $flag                        ;;
3149             -D*|-I*)        echo $flag                        ;;
3150             --gcc|--abi=*)  echo $flag                        ;;
3151             -me)            echo $flag                        ;;
3152         esac
3153     done
3154 }
3155
3156 probe_cc(){
3157     pfx=$1
3158     _cc=$2
3159
3160     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3161     unset _ld_o _ldflags _ld_lib _ld_path
3162     unset _depflags _DEPCMD _DEPFLAGS
3163     _flags_filter=echo
3164
3165     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3166         _type=llvm_gcc
3167         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3168         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3169         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3170         _cflags_speed='-O3'
3171         _cflags_size='-Os'
3172     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3173         _type=gcc
3174         gcc_version=$($_cc --version | head -n1)
3175         gcc_basever=$($_cc -dumpversion)
3176         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3177         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3178         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3179         if ! $_cc -dumpversion | grep -q '^2\.'; then
3180             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3181         fi
3182         _cflags_speed='-O3'
3183         _cflags_size='-Os'
3184     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3185         _type=icc
3186         _ident=$($_cc --version | head -n1)
3187         _depflags='-MMD'
3188         _cflags_speed='-O3'
3189         _cflags_size='-Os'
3190         _cflags_noopt='-O1'
3191     elif $_cc -v 2>&1 | grep -q xlc; then
3192         _type=xlc
3193         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3194         _cflags_speed='-O5'
3195         _cflags_size='-O5 -qcompact'
3196     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3197         _type=ccc
3198         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3199         _DEPFLAGS='-M'
3200         _cflags_speed='-fast'
3201         _cflags_size='-O1'
3202         _flags_filter=ccc_flags
3203     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3204         test -d "$sysroot" || die "No valid sysroot specified."
3205         _type=armcc
3206         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3207         armcc_conf="$PWD/armcc.conf"
3208         $_cc --arm_linux_configure                 \
3209              --arm_linux_config_file="$armcc_conf" \
3210              --configure_sysroot="$sysroot"        \
3211              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3212              die "Error creating armcc configuration file."
3213         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3214         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3215         as_default="${cross_prefix}gcc"
3216         _depflags='-MMD'
3217         _cflags_speed='-O3'
3218         _cflags_size='-Os'
3219     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3220         _type=tms470
3221         _ident=$($_cc -version | head -n1 | tr -s ' ')
3222         _flags='--gcc --abi=eabi -me'
3223         _cc_e='-ppl -fe=$@'
3224         _cc_o='-fe=$@'
3225         _depflags='-ppa -ppd=$(@:.o=.d)'
3226         _cflags_speed='-O3 -mf=5'
3227         _cflags_size='-O3 -mf=2'
3228         _flags_filter=tms470_flags
3229     elif $_cc -v 2>&1 | grep -q clang; then
3230         _type=clang
3231         _ident=$($_cc --version 2>/dev/null | head -n1)
3232         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3233         _cflags_speed='-O3'
3234         _cflags_size='-Os'
3235     elif $_cc -V 2>&1 | grep -q Sun; then
3236         _type=suncc
3237         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3238         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3239         _DEPFLAGS='-xM1 -xc99'
3240         _ldflags='-std=c99'
3241         _cflags_speed='-O5'
3242         _cflags_size='-O5 -xspace'
3243         _flags_filter=suncc_flags
3244     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3245         _type=pathscale
3246         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3247         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3248         _cflags_speed='-O2'
3249         _cflags_size='-Os'
3250         _flags_filter='filter_out -Wdisabled-optimization'
3251     elif $_cc -v 2>&1 | grep -q Open64; then
3252         _type=open64
3253         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3254         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3255         _cflags_speed='-O2'
3256         _cflags_size='-Os'
3257         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3258     elif $_cc -V 2>&1 | grep -q Portland; then
3259         _type=pgi
3260         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3261         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3262         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3263         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3264         _cflags_noopt="-O1"
3265         _flags_filter=pgi_flags
3266     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3267         _type=armasm
3268         _ident=$($_cc | head -n1)
3269         # 4509: "This form of conditional instruction is deprecated"
3270         _flags="-nologo -ignore 4509"
3271         _flags_filter=armasm_flags
3272     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3273         _type=msvc
3274         _ident=$($_cc 2>&1 | head -n1)
3275         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3276         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3277         _cflags_speed="-O2"
3278         _cflags_size="-O1"
3279         if $_cc -nologo- 2>&1 | grep -q Linker; then
3280             _ld_o='-out:$@'
3281         else
3282             _ld_o='-Fe$@'
3283         fi
3284         _cc_o='-Fo$@'
3285         _cc_e='-P -Fi$@'
3286         _flags_filter=msvc_flags
3287         _ld_lib='lib%.a'
3288         _ld_path='-libpath:'
3289         _flags='-nologo'
3290     elif $_cc 2>&1 | grep -q Intel; then
3291         _type=icl
3292         _ident=$($_cc 2>&1 | head -n1)
3293         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3294         # Not only is O3 broken on 13.x+ but it is slower on all previous
3295         # versions (tested) as well.
3296         _cflags_speed="-O2"
3297         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3298         if $_cc 2>&1 | grep -q Linker; then
3299             _ld_o='-out:$@'
3300         else
3301             _ld_o='-Fe$@'
3302         fi
3303         _cc_o='-Fo$@'
3304         _cc_e='-P'
3305         _flags_filter=icl_flags
3306         _ld_lib='lib%.a'
3307         _ld_path='-libpath:'
3308         # -Qdiag-error to make icl error when seeing certain unknown arguments
3309         _flags='-nologo -Qdiag-error:4044,10157'
3310         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3311         # with MSVC which enables it by default.
3312         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3313     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3314         # lld can emulate multiple different linkers; in ms link.exe mode,
3315         # the -? parameter gives the help output which contains an identifyable
3316         # string, while it gives an error in other modes.
3317         _type=lld-link
3318         # The link.exe mode doesn't have a switch for getting the version,
3319         # but we can force it back to gnu mode and get the version from there.
3320         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3321         _ld_o='-out:$@'
3322         _flags_filter=msvc_flags
3323         _ld_lib='lib%.a'
3324         _ld_path='-libpath:'
3325     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3326         _type=cparser
3327         _ident=$($_cc --version | head -n1)
3328         _depflags='-MMD'
3329         _cflags_speed='-O4'
3330         _cflags_size='-O2'
3331         _flags_filter=cparser_flags
3332     fi
3333
3334     eval ${pfx}_type=\$_type
3335     eval ${pfx}_ident=\$_ident
3336 }
3337
3338 set_ccvars(){
3339     eval ${1}_C=\${_cc_c-\${${1}_C}}
3340     eval ${1}_E=\${_cc_e-\${${1}_E}}
3341     eval ${1}_O=\${_cc_o-\${${1}_O}}
3342
3343     if [ -n "$_depflags" ]; then
3344         eval ${1}_DEPFLAGS=\$_depflags
3345     else
3346         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3347         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3348         eval DEP${1}FLAGS=\$_flags
3349     fi
3350 }
3351
3352 probe_cc cc "$cc"
3353 cflags_filter=$_flags_filter
3354 cflags_speed=$_cflags_speed
3355 cflags_size=$_cflags_size
3356 cflags_noopt=$_cflags_noopt
3357 add_cflags $_flags $_cflags
3358 cc_ldflags=$_ldflags
3359 set_ccvars CC
3360
3361 probe_cc hostcc "$host_cc"
3362 host_cflags_filter=$_flags_filter
3363 add_host_cflags  $_flags $_cflags
3364 set_ccvars HOSTCC
3365
3366 test -n "$cc_type" && enable $cc_type ||
3367     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3368
3369 : ${as_default:=$cc}
3370 : ${objcc_default:=$cc}
3371 : ${dep_cc_default:=$cc}
3372 : ${ld_default:=$cc}
3373 : ${host_ld_default:=$host_cc}
3374 set_default ar as objcc dep_cc ld host_ld
3375
3376 probe_cc as "$as"
3377 asflags_filter=$_flags_filter
3378 add_asflags $_flags $_cflags
3379 set_ccvars AS
3380
3381 probe_cc objcc "$objcc"
3382 objcflags_filter=$_flags_filter
3383 add_objcflags $_flags $_cflags
3384 set_ccvars OBJC
3385
3386 probe_cc ld "$ld"
3387 ldflags_filter=$_flags_filter
3388 add_ldflags $_flags $_ldflags
3389 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3390 LD_O=${_ld_o-$LD_O}
3391 LD_LIB=${_ld_lib-$LD_LIB}
3392 LD_PATH=${_ld_path-$LD_PATH}
3393
3394 probe_cc hostld "$host_ld"
3395 host_ldflags_filter=$_flags_filter
3396 add_host_ldflags $_flags $_ldflags
3397 HOSTLD_O=${_ld_o-$HOSTLD_O}
3398
3399 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3400     probe_cc depcc "$dep_cc"
3401     CCDEP=${_DEPCMD:-$DEPCMD}
3402     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3403     DEPCCFLAGS=$_flags
3404 fi
3405
3406 if $ar 2>&1 | grep -q Microsoft; then
3407     arflags="-nologo"
3408     ar_o='-out:$@'
3409 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3410     arflags="rq"
3411     ar_o='$@'
3412 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3413     arflags='-Xany -r -c'
3414     ar_o='$@'
3415 else
3416     arflags="rc"
3417     ar_o='$@'
3418 fi
3419
3420 add_cflags $extra_cflags
3421 add_objcflags $extra_objcflags
3422 add_asflags $extra_cflags
3423
3424 if test -n "$sysroot"; then
3425     case "$cc_type" in
3426         gcc|llvm_gcc|clang)
3427             add_cppflags --sysroot="$sysroot"
3428             add_ldflags --sysroot="$sysroot"
3429         ;;
3430         tms470)
3431             add_cppflags -I"$sysinclude"
3432             add_ldflags  --sysroot="$sysroot"
3433         ;;
3434     esac
3435 fi
3436
3437 if test "$cpu" = host; then
3438     enabled cross_compile &&
3439         die "--cpu=host makes no sense when cross-compiling."
3440
3441     case "$cc_type" in
3442         gcc|llvm_gcc)
3443             check_native(){
3444                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3445                 sed -n "/cc1.*$1=/{
3446                             s/.*$1=\\([^ ]*\\).*/\\1/
3447                             p
3448                             q
3449                         }" $TMPE
3450             }
3451             cpu=$(check_native -march || check_native -mcpu)
3452         ;;
3453     esac
3454
3455     test "${cpu:-host}" = host &&
3456         die "--cpu=host not supported with compiler $cc"
3457 fi
3458
3459 # Deal with common $arch aliases
3460 case "$arch" in
3461     aarch64|arm64)
3462         arch="aarch64"
3463     ;;
3464     arm*)
3465         arch="arm"
3466     ;;
3467     mips*|IP*)
3468         case "$arch" in
3469         *el)
3470             add_cppflags -EL
3471             add_ldflags -EL
3472         ;;
3473         *eb)
3474             add_cppflags -EB
3475             add_ldflags -EB
3476         ;;
3477         esac
3478         arch="mips"
3479     ;;
3480     parisc*|hppa*)
3481         arch="parisc"
3482     ;;
3483     "Power Macintosh"|ppc*|powerpc*)
3484         arch="ppc"
3485     ;;
3486     s390|s390x)
3487         arch="s390"
3488     ;;
3489     sh4|sh)
3490         arch="sh4"
3491     ;;
3492     sun4u|sparc*)
3493         arch="sparc"
3494     ;;
3495     tilegx|tile-gx)
3496         arch="tilegx"
3497     ;;
3498     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3499         arch="x86"
3500     ;;
3501 esac
3502
3503 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3504 enable $arch
3505
3506 # Add processor-specific flags
3507 if enabled aarch64; then
3508
3509     case $cpu in
3510         armv*)
3511             cpuflags="-march=$cpu"
3512         ;;
3513         *)
3514             cpuflags="-mcpu=$cpu"
3515         ;;
3516     esac
3517
3518 elif enabled alpha; then
3519
3520     cpuflags="-mcpu=$cpu"
3521
3522 elif enabled arm; then
3523
3524     check_arm_arch() {
3525         check_cpp_condition stddef.h \
3526             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3527             $cpuflags
3528     }
3529
3530     probe_arm_arch() {
3531         if   check_arm_arch 4;        then echo armv4
3532         elif check_arm_arch 4T;       then echo armv4t
3533         elif check_arm_arch 5;        then echo armv5
3534         elif check_arm_arch 5E;       then echo armv5e
3535         elif check_arm_arch 5T;       then echo armv5t
3536         elif check_arm_arch 5TE;      then echo armv5te
3537         elif check_arm_arch 5TEJ;     then echo armv5te
3538         elif check_arm_arch 6;        then echo armv6
3539         elif check_arm_arch 6J;       then echo armv6j
3540         elif check_arm_arch 6K;       then echo armv6k
3541         elif check_arm_arch 6Z;       then echo armv6z
3542         elif check_arm_arch 6ZK;      then echo armv6zk
3543         elif check_arm_arch 6T2;      then echo armv6t2
3544         elif check_arm_arch 7;        then echo armv7
3545         elif check_arm_arch 7A  7_A;  then echo armv7-a
3546         elif check_arm_arch 7S;       then echo armv7-a
3547         elif check_arm_arch 7R  7_R;  then echo armv7-r
3548         elif check_arm_arch 7M  7_M;  then echo armv7-m
3549         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3550         elif check_arm_arch 8A  8_A;  then echo armv8-a
3551         fi
3552     }
3553
3554     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3555
3556     case $cpu in
3557         armv*)
3558             cpuflags="-march=$cpu"
3559             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3560         ;;
3561         *)
3562             cpuflags="-mcpu=$cpu"
3563             case $cpu in
3564                 cortex-a*)                               subarch=armv7a  ;;
3565                 cortex-r*)                               subarch=armv7r  ;;
3566                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3567                 arm11*)                                  subarch=armv6   ;;
3568                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3569                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3570                 *)                             subarch=$(probe_arm_arch) ;;
3571             esac
3572         ;;
3573     esac
3574
3575     case "$subarch" in
3576         armv5t*)    enable fast_clz                ;;
3577         armv[6-8]*) enable fast_clz fast_unaligned ;;
3578     esac
3579
3580 elif enabled avr32; then
3581
3582     case $cpu in
3583         ap7[02]0[0-2])
3584             subarch="avr32_ap"
3585             cpuflags="-mpart=$cpu"
3586         ;;
3587         ap)
3588             subarch="avr32_ap"
3589             cpuflags="-march=$cpu"
3590         ;;
3591         uc3[ab]*)
3592             subarch="avr32_uc"
3593             cpuflags="-mcpu=$cpu"
3594         ;;
3595         uc)
3596             subarch="avr32_uc"
3597             cpuflags="-march=$cpu"
3598         ;;
3599     esac
3600
3601 elif enabled bfin; then
3602
3603     cpuflags="-mcpu=$cpu"
3604
3605 elif enabled mips; then
3606
3607     cpuflags="-march=$cpu"
3608
3609 elif enabled ppc; then
3610
3611     disable ldbrx
3612
3613     case $(tolower $cpu) in
3614         601|ppc601|powerpc601)
3615             cpuflags="-mcpu=601"
3616             disable altivec
3617         ;;
3618         603*|ppc603*|powerpc603*)
3619             cpuflags="-mcpu=603"
3620             disable altivec
3621         ;;
3622         604*|ppc604*|powerpc604*)
3623             cpuflags="-mcpu=604"
3624             disable altivec
3625         ;;
3626         g3|75*|ppc75*|powerpc75*)
3627             cpuflags="-mcpu=750"
3628             disable altivec
3629         ;;
3630         g4|745*|ppc745*|powerpc745*)
3631             cpuflags="-mcpu=7450"
3632             disable vsx
3633         ;;
3634         74*|ppc74*|powerpc74*)
3635             cpuflags="-mcpu=7400"
3636             disable vsx
3637         ;;
3638         g5|970|ppc970|powerpc970)
3639             cpuflags="-mcpu=970"
3640             disable vsx
3641         ;;
3642         power[3-6]*)
3643             cpuflags="-mcpu=$cpu"
3644             disable vsx
3645         ;;
3646         power[7-8]*)
3647             cpuflags="-mcpu=$cpu"
3648             enable ldbrx
3649         ;;
3650         cell)
3651             cpuflags="-mcpu=cell"
3652             enable ldbrx
3653             disable vsx
3654         ;;
3655         e500mc)
3656             cpuflags="-mcpu=e500mc"
3657             disable altivec
3658         ;;
3659         e500v2)
3660             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3661             disable altivec
3662             disable dcbzl
3663         ;;
3664         e500)
3665             cpuflags="-mcpu=8540 -mhard-float"
3666             disable altivec
3667             disable dcbzl
3668         ;;
3669     esac
3670
3671 elif enabled sparc; then
3672
3673     case $cpu in
3674         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3675             cpuflags="-mcpu=$cpu"
3676         ;;
3677         ultrasparc*|niagara[234])
3678             cpuflags="-mcpu=$cpu"
3679         ;;
3680     esac
3681
3682 elif enabled x86; then
3683
3684     case $cpu in
3685         i[345]86|pentium)
3686             cpuflags="-march=$cpu"
3687             disable i686
3688             disable mmx
3689         ;;
3690         # targets that do NOT support nopl and conditional mov (cmov)
3691         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3692             cpuflags="-march=$cpu"
3693             disable i686
3694         ;;
3695         # targets that do support nopl and conditional mov (cmov)
3696         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3697             cpuflags="-march=$cpu"
3698             enable i686
3699             enable fast_cmov
3700         ;;
3701         # targets that do support conditional mov but on which it's slow
3702         pentium4|pentium4m|prescott|nocona)
3703             cpuflags="-march=$cpu"
3704             enable i686
3705             disable fast_cmov
3706         ;;
3707     esac
3708
3709 fi
3710
3711 if [ "$cpu" != generic ]; then
3712     add_cflags  $cpuflags
3713     add_asflags $cpuflags
3714     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3715 fi
3716
3717 # compiler sanity check
3718 check_exec <<EOF
3719 int main(void){ return 0; }
3720 EOF
3721 if test "$?" != 0; then
3722     echo "$cc is unable to create an executable file."
3723     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3724         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3725         echo "Only do this if you know what cross compiling means."
3726     fi
3727     die "C compiler test failed."
3728 fi
3729
3730 add_cppflags -D_ISOC99_SOURCE
3731
3732 # some compilers silently accept -std=c11, so we also need to check that the
3733 # version macro is defined properly
3734 if test_cflags_cpp -std=c11 "__STDC_VERSION__ >= 201112L"; then
3735     add_cflags -std=c11
3736 else
3737     check_cflags -std=c99
3738 fi
3739
3740 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3741 #include <stdlib.h>
3742 EOF
3743 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3744 #include <stdlib.h>
3745 EOF
3746
3747 add_host_cppflags -D_ISOC99_SOURCE
3748 check_host_cflags -std=c99
3749 check_host_cflags -Wall
3750 check_host_cflags -O3
3751
3752 check_64bit(){
3753     arch32=$1
3754     arch64=$2
3755     expr=$3
3756     check_code cc "" "int test[2*($expr) - 1]" &&
3757         subarch=$arch64 || subarch=$arch32
3758 }
3759
3760 case "$arch" in
3761     aarch64|alpha|ia64)
3762         spic=$shared
3763     ;;
3764     mips)
3765         check_64bit mips mips64 '_MIPS_SIM > 1'
3766         spic=$shared
3767     ;;
3768     parisc)
3769         check_64bit parisc parisc64 'sizeof(void *) > 4'
3770         spic=$shared
3771     ;;
3772     ppc)
3773         check_64bit ppc ppc64 'sizeof(void *) > 4'
3774         spic=$shared
3775     ;;
3776     s390)
3777         check_64bit s390 s390x 'sizeof(void *) > 4'
3778         spic=$shared
3779     ;;
3780     sparc)
3781         check_64bit sparc sparc64 'sizeof(void *) > 4'
3782         spic=$shared
3783     ;;
3784     x86)
3785         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3786         if test "$subarch" = "x86_64"; then
3787             spic=$shared
3788         fi
3789     ;;
3790 esac
3791
3792 enable $subarch
3793 enabled spic && enable_weak pic
3794
3795 # OS specific
3796 case $target_os in
3797     aix)
3798         SHFLAGS=-shared
3799         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3800         enabled shared && add_ldflags -Wl,-brtl
3801         ;;
3802     android)
3803         disable symver
3804         enable section_data_rel_ro
3805         SLIB_INSTALL_NAME='$(SLIBNAME)'
3806         SLIB_INSTALL_LINKS=
3807         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3808         ;;
3809     haiku)
3810         prefix_default="/boot/common"
3811         network_extralibs="-lnetwork"
3812         host_extralibs=
3813         ;;
3814     sunos)
3815         SHFLAGS='-shared -Wl,-h,$$(@F)'
3816         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3817         network_extralibs="-lsocket -lnsl"
3818         # When using suncc to build, the Solaris linker will mark
3819         # an executable with each instruction set encountered by
3820         # the Solaris assembler.  As our libraries contain their own
3821         # guards for processor-specific code, instead suppress
3822         # generation of the HWCAPS ELF section on Solaris x86 only.
3823         enabled_all suncc x86 &&
3824             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3825             add_ldflags -Wl,-M,mapfile
3826         nm_default='nm -P -g'
3827         version_script='-M'
3828         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3829         ;;
3830     netbsd)
3831         disable symver
3832         oss_indev_extralibs="-lossaudio"
3833         oss_outdev_extralibs="-lossaudio"
3834         ;;
3835     openbsd|bitrig)
3836         disable symver
3837         SHFLAGS='-shared'
3838         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3839         SLIB_INSTALL_LINKS=
3840         oss_indev_extralibs="-lossaudio"
3841         oss_outdev_extralibs="-lossaudio"
3842         ;;
3843     dragonfly)
3844         disable symver
3845         ;;
3846     freebsd)
3847         ;;
3848     bsd/os)
3849         add_extralibs -lpoll -lgnugetopt
3850         ;;
3851     darwin)
3852         enabled ppc && add_asflags -force_cpusubtype_ALL
3853         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3854         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3855         add_ldflags -Wl,-dynamic,-search_paths_first
3856         SLIBSUF=".dylib"
3857         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3858         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3859         objformat="macho"
3860         enabled x86_64 && objformat="macho64"
3861         enabled_any pic shared ||
3862             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3863         check_header dispatch/dispatch.h &&
3864             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3865         ;;
3866     msys*)
3867         die "Native MSYS builds are discouraged, please use the MINGW environment."
3868         ;;
3869     mingw32*|mingw64*)
3870         if test $target_os = "mingw32ce"; then
3871             disable network
3872         else
3873             target_os=mingw32
3874         fi
3875         LIBTARGET=i386
3876         if enabled x86_64; then
3877             LIBTARGET="i386:x86-64"
3878         elif enabled arm; then
3879             LIBTARGET=arm-wince
3880         fi
3881         check_ldflags -Wl,--nxcompat
3882         check_ldflags -Wl,--dynamicbase
3883         shlibdir_default="$bindir_default"
3884         SLIBPREF=""
3885         SLIBSUF=".dll"
3886         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3887         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3888         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3889         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3890         SLIB_INSTALL_LINKS=
3891         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3892         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3893         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3894         objformat="win32"
3895         dlltool="${cross_prefix}dlltool"
3896         ranlib=:
3897         enable dos_paths
3898         ;;
3899     win32|win64)
3900         disable symver
3901         if enabled shared; then
3902             # Link to the import library instead of the normal static library
3903             # for shared libs.
3904             LD_LIB='%.lib'
3905             # Cannot build both shared and static libs with MSVC or icl.
3906             disable static
3907         fi
3908         shlibdir_default="$bindir_default"
3909         SLIBPREF=""
3910         SLIBSUF=".dll"
3911         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3912         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3913         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3914         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3915         SLIB_INSTALL_LINKS=
3916         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3917         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3918         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3919         objformat="win32"
3920         ranlib=:
3921         enable dos_paths
3922         ;;
3923     cygwin*)
3924         target_os=cygwin
3925         shlibdir_default="$bindir_default"
3926         SLIBPREF="cyg"
3927         SLIBSUF=".dll"
3928         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3929         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3930         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3931         SLIB_INSTALL_LINKS=
3932         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3933         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3934         objformat="win32"
3935         enable dos_paths
3936         ;;
3937     *-dos|freedos|opendos)
3938         network_extralibs="-lsocket"
3939         objformat="coff"
3940         enable dos_paths
3941         add_cppflags -U__STRICT_ANSI__
3942         ;;
3943     linux)
3944         enable dv1394
3945         enable section_data_rel_ro
3946         ;;
3947     irix*)
3948         target_os=irix
3949         ranlib="echo ignoring ranlib"
3950         ;;
3951     os/2*)
3952         ln_s="cp -f"
3953         objformat="aout"
3954         add_cppflags -D_GNU_SOURCE
3955         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3956         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3957         LIBSUF="_s.a"
3958         SLIBPREF=""
3959         SLIBSUF=".dll"
3960         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3961         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3962         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3963             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3964             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3965             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3966             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3967         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3968             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3969         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3970         enable dos_paths
3971         ;;
3972     gnu/kfreebsd)
3973         add_cppflags -D_BSD_SOURCE
3974         ;;
3975     gnu)
3976         ;;
3977     qnx)
3978         add_cppflags -D_QNX_SOURCE
3979         network_extralibs="-lsocket"
3980         ;;
3981     symbian)
3982         SLIBSUF=".dll"
3983         enable dos_paths
3984         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3985         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3986         add_ldflags -Wl,--target1-abs,--no-undefined \
3987                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3988                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3989         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3990                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3991                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3992         ;;
3993     osf1)
3994         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3995         ;;
3996     minix)
3997         ;;
3998     none)
3999         ;;
4000     *)
4001         die "Unknown OS '$target_os'."
4002         ;;
4003 esac
4004
4005 # determine libc flavour
4006
4007 probe_libc(){
4008     pfx=$1
4009     pfx_no_=${pfx%_}
4010     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4011     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4012         eval ${pfx}libc_type=uclibc
4013         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4014     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4015         eval ${pfx}libc_type=glibc
4016         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4017     # MinGW headers can be installed on Cygwin, so check for newlib first.
4018     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4019         eval ${pfx}libc_type=newlib
4020         add_${pfx}cppflags -U__STRICT_ANSI__
4021     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4022     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4023         eval ${pfx}libc_type=mingw64
4024         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4025         eval test \$${pfx_no_}cc_type = "gcc" &&
4026             add_${pfx}cppflags -D__printf__=__gnu_printf__
4027     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4028          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4029         eval ${pfx}libc_type=mingw32
4030         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4031             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4032             die "ERROR: MinGW32 runtime version must be >= 3.15."
4033         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4034         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4035             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4036         eval test \$${pfx_no_}cc_type = "gcc" &&
4037             add_${pfx}cppflags -D__printf__=__gnu_printf__
4038     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4039         eval ${pfx}libc_type=msvcrt
4040         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4041             if [ "$pfx" = host_ ]; then
4042                 add_host_cppflags -Dsnprintf=_snprintf
4043             else
4044                 add_compat strtod.o strtod=avpriv_strtod
4045                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4046                                              _snprintf=avpriv_snprintf  \
4047                                              vsnprintf=avpriv_vsnprintf
4048             fi
4049         fi
4050         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4051         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4052         # 0x601 by default unless something else is set by the user.
4053         # This can easily lead to us detecting functions only present
4054         # in such new versions and producing binaries requiring windows 7.0.
4055         # Therefore explicitly set the default to XP unless the user has
4056         # set something else on the command line.
4057         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4058         # family. For these cases, configure is free to use any functions
4059         # found in the SDK headers by default. (Alternatively, we could force
4060         # _WIN32_WINNT to 0x0602 in that case.)
4061         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4062             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4063 #ifdef WINAPI_FAMILY
4064 #include <winapifamily.h>
4065 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4066 #error not desktop
4067 #endif
4068 #endif
4069 EOF
4070         if [ "$pfx" = "" ]; then
4071             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4072         fi
4073     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4074         eval ${pfx}libc_type=klibc
4075     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4076         eval ${pfx}libc_type=bionic
4077     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4078         eval ${pfx}libc_type=solaris
4079         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4080     else
4081         eval ${pfx}libc_type=default
4082         add_${pfx}cppflags -D_DEFAULT_SOURCE
4083     fi
4084 }
4085
4086 probe_libc
4087 test -n "$libc_type" && enable libc_$libc_type
4088 probe_libc host_
4089 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4090
4091 case $libc_type in
4092     bionic)
4093         add_compat strtod.o strtod=avpriv_strtod
4094         ;;
4095 esac
4096
4097 # hacks for compiler/libc/os combinations
4098
4099 if enabled_all tms470 libc_glibc; then
4100     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4101     add_cppflags -D__USER_LABEL_PREFIX__=
4102     add_cppflags -D__builtin_memset=memset
4103     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4104     add_cflags   -pds=48    # incompatible redefinition of macro
4105 fi
4106
4107 if enabled_all ccc libc_glibc; then
4108     add_ldflags -Wl,-z,now  # calls to libots crash without this
4109 fi
4110
4111 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4112     add_cppflags '-I\$(SRC_PATH)/compat/float'
4113
4114 esc(){
4115     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4116 }
4117
4118 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4119
4120 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4121
4122 set_default $PATHS_LIST
4123 set_default nm
4124
4125 # we need to build at least one lib type
4126 if ! enabled_any static shared; then
4127     cat <<EOF
4128 At least one library type must be built.
4129 Specify --enable-static to build the static libraries or --enable-shared to
4130 build the shared libraries as well. To only build the shared libraries specify
4131 --disable-static in addition to --enable-shared.
4132 EOF
4133     exit 1
4134 fi
4135
4136 disabled optimizations || check_cflags -fomit-frame-pointer
4137
4138 enable_weak_pic() {
4139     disabled pic && return
4140     enable pic
4141     add_cppflags -DPIC
4142     case "$target_os" in
4143     mingw*|cygwin*)
4144         ;;
4145     *)
4146         add_cflags -fPIC
4147         ;;
4148     esac
4149     add_asflags  -fPIC
4150 }
4151
4152 enabled pic && enable_weak_pic
4153
4154 check_cc <<EOF || die "Symbol mangling check failed."
4155 int ff_extern;
4156 EOF
4157 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4158 extern_prefix=${sym%%ff_extern*}
4159
4160 check_cc <<EOF && enable_weak inline_asm
4161 void foo(void) { __asm__ volatile ("" ::); }
4162 EOF
4163
4164 _restrict=
4165 for restrict_keyword in restrict __restrict__ __restrict; do
4166     check_cc <<EOF && _restrict=$restrict_keyword && break
4167 void foo(char * $restrict_keyword p);
4168 EOF
4169 done
4170
4171 check_cc <<EOF && enable pragma_deprecated
4172 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4173 EOF
4174
4175 check_cc <<EOF && enable attribute_packed
4176 struct { int x; } __attribute__((packed)) x;
4177 EOF
4178
4179 check_cc <<EOF && enable attribute_may_alias
4180 union { int x; } __attribute__((may_alias)) x;
4181 EOF
4182
4183 check_cc <<EOF || die "endian test failed"
4184 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4185 EOF
4186 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4187
4188 check_gas() {
4189     log "check_gas using '$as' as AS"
4190     # :vararg is used on aarch64, arm and ppc altivec
4191     check_as <<EOF || return 1
4192 .macro m n, y:vararg=0
4193 \n: .int \y
4194 .endm
4195 m x
4196 EOF
4197     # .altmacro is only used in arm asm
4198     ! enabled arm || check_as <<EOF || return 1
4199 .altmacro
4200 EOF
4201     enable gnu_as
4202     return 0
4203 }
4204
4205 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4206     nogas=:
4207     enabled_any arm aarch64 && nogas=die
4208     enabled_all ppc altivec && nogas=warn
4209     as_noop=-v
4210
4211     case $as_type in
4212         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4213         gcc)  gaspp_as_type=gas ;;
4214         *)    gaspp_as_type=$as_type ;;
4215     esac
4216
4217     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4218
4219     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4220         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4221
4222     if ! check_gas ; then
4223         as=${gas:=$as}
4224         check_gas || \
4225             $nogas "GNU assembler not found, install/update gas-preprocessor"
4226     fi
4227
4228     check_as <<EOF && enable as_func
4229 .func test
4230 .endfunc
4231 EOF
4232 fi
4233
4234 check_inline_asm inline_asm_labels '"1:\n"'
4235
4236 if enabled aarch64; then
4237     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4238     # internal assembler in clang 3.3 does not support this instruction
4239     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4240     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4241
4242     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4243
4244 elif enabled alpha; then
4245
4246     check_cflags -mieee
4247
4248 elif enabled arm; then
4249
4250     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4251     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4252     enabled thumb && check_cflags -mthumb || check_cflags -marm
4253
4254     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4255         enable vfp_args
4256     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4257         enable vfp_args
4258     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4259         case "${cross_prefix:-$cc}" in
4260             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4261             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4262 __asm__ (".eabi_attribute 28, 1");
4263 int main(void) { return 0; }
4264 EOF
4265         esac
4266         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4267     fi
4268
4269     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4270     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4271     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4272     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4273     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4274     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4275
4276     [ $target_os = linux ] || [ $target_os = android ] ||
4277         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4278             $ARCH_EXT_LIST_ARM
4279
4280     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4281
4282     check_as <<EOF && enable as_dn_directive
4283 ra .dn d0.i16
4284 .unreq ra
4285 EOF
4286     check_as <<EOF && enable as_fpu_directive
4287 .fpu neon
4288 EOF
4289
4290     # llvm's integrated assembler supports .object_arch from llvm 3.5
4291     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4292 .object_arch armv4
4293 EOF
4294
4295     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4296
4297 elif enabled mips; then
4298
4299     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4300
4301     # make sure that only an instruction set is enabled
4302     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4303
4304     if enabled mips64; then
4305         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4306             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4307                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4308     else
4309         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4310             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4311                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4312     fi
4313
4314 elif enabled parisc; then
4315
4316     if enabled gcc; then
4317         case $($cc -dumpversion) in
4318             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4319         esac
4320     fi
4321
4322 elif enabled ppc; then
4323
4324     enable local_aligned_8 local_aligned_16 local_aligned_32
4325
4326     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4327     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4328     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4329     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4330
4331     # AltiVec flags: The FSF version of GCC differs from the Apple version
4332     if enabled altivec; then
4333         check_cflags -maltivec -mabi=altivec &&
4334         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4335         check_cflags -faltivec
4336
4337         # check if our compiler supports Motorola AltiVec C API
4338         check_cc <<EOF || disable altivec
4339 $inc_altivec_h
4340 int main(void) {
4341     vector signed int v1 = (vector signed int) { 0 };
4342     vector signed int v2 = (vector signed int) { 1 };
4343     v1 = vec_add(v1, v2);
4344     return 0;
4345 }
4346 EOF
4347
4348         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4349     fi
4350
4351     if enabled vsx; then
4352         check_cflags -mvsx &&
4353         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4354     fi
4355
4356     if enabled power8; then
4357         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4358     fi
4359
4360 elif enabled x86; then
4361
4362     check_builtin rdtsc    intrin.h   "__rdtsc()"
4363     check_builtin mm_empty mmintrin.h "_mm_empty()"
4364
4365     enable local_aligned_8 local_aligned_16 local_aligned_32
4366
4367     # check whether EBP is available on x86
4368     # As 'i' is stored on the stack, this program will crash
4369     # if the base pointer is used to access it because the
4370     # base pointer is cleared in the inline assembly code.
4371     check_exec_crash <<EOF && enable ebp_available
4372 volatile int i=0;
4373 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4374 return i;
4375 EOF
4376
4377     # check whether EBX is available on x86
4378     check_inline_asm ebx_available '""::"b"(0)' &&
4379         check_inline_asm ebx_available '"":::"%ebx"'
4380
4381     # check whether xmm clobbers are supported
4382     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4383
4384     # check whether binutils is new enough to compile SSSE3/MMXEXT
4385     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4386     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4387
4388     if ! disabled_any asm mmx yasm; then
4389         if check_cmd $yasmexe --version; then
4390             enabled x86_64 && yasm_extra="-m amd64"
4391             yasm_debug="-g dwarf2"
4392         elif check_cmd nasm -v; then
4393             yasmexe=nasm
4394             yasm_debug="-g -F dwarf"
4395             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4396         fi
4397
4398         YASMFLAGS="-f $objformat $yasm_extra"
4399         enabled pic               && append YASMFLAGS "-DPIC"
4400         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4401         case "$objformat" in
4402             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4403         esac
4404
4405         check_yasm "movbe ecx, [5]" && enable yasm ||
4406             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4407         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4408         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4409         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4410         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4411         check_yasm "CPU amdnop" || disable cpunop
4412     fi
4413
4414     case "$cpu" in
4415         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4416             disable fast_clz
4417         ;;
4418     esac
4419
4420 fi
4421
4422 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4423
4424 check_ldflags -Wl,--as-needed
4425
4426 if check_func dlopen; then
4427     ldl=
4428 elif check_func dlopen -ldl; then
4429     ldl=-ldl
4430 fi
4431
4432 if ! disabled network; then
4433     check_func getaddrinfo $network_extralibs
4434     check_func inet_aton $network_extralibs
4435
4436     check_type netdb.h "struct addrinfo"
4437     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4438     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4439     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4440     check_type poll.h "struct pollfd"
4441     check_type netinet/sctp.h "struct sctp_event_subscribe"
4442     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4443     check_type netinet/in.h "struct sockaddr_in6"
4444     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4445     check_type "sys/types.h sys/socket.h" socklen_t
4446
4447     # Prefer arpa/inet.h over winsock2
4448     if check_header arpa/inet.h ; then
4449         check_func closesocket
4450     elif check_header winsock2.h ; then
4451         check_func_headers winsock2.h closesocket -lws2 &&
4452             network_extralibs="-lws2" ||
4453         { check_func_headers winsock2.h closesocket -lws2_32 &&
4454             network_extralibs="-lws2_32"; } || disable winsock2_h network
4455         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4456
4457         check_type ws2tcpip.h socklen_t
4458         check_type ws2tcpip.h "struct addrinfo"
4459         check_type ws2tcpip.h "struct group_source_req"
4460         check_type ws2tcpip.h "struct ip_mreq_source"
4461         check_type ws2tcpip.h "struct ipv6_mreq"
4462         check_type winsock2.h "struct pollfd"
4463         check_struct winsock2.h "struct sockaddr" sa_len
4464         check_type ws2tcpip.h "struct sockaddr_in6"
4465         check_type ws2tcpip.h "struct sockaddr_storage"
4466     else
4467         disable network
4468     fi
4469 fi
4470
4471 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4472 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4473 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4474 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4475
4476 case "$custom_allocator" in
4477     jemalloc)
4478         # jemalloc by default does not use a prefix
4479         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4480     ;;
4481     tcmalloc)
4482         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4483         malloc_prefix=tc_
4484     ;;
4485 esac
4486
4487 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4488 check_func  ${malloc_prefix}memalign            && enable memalign
4489 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4490
4491 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4492     check_func_headers time.h clock_gettime ||
4493         { check_lib time.h clock_gettime -lrt && LIBRT="-lrt"; }
4494
4495 check_func  fcntl
4496 check_func  fork
4497 check_func  gethrtime
4498 check_func  getopt
4499 check_func  getrusage
4500 check_func  gettimeofday
4501 check_func  gmtime_r
4502 check_func  isatty
4503 check_func  localtime_r
4504 check_func  mach_absolute_time
4505 check_func  mkstemp
4506 check_func  mmap
4507 check_func  mprotect
4508 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4509 check_func_headers time.h nanosleep || check_lib time.h nanosleep -lrt
4510 check_func  sched_getaffinity
4511 check_func  setrlimit
4512 check_func  strerror_r
4513 check_func  sysconf
4514 check_func  sysctl
4515 check_func  usleep
4516
4517 check_func_headers io.h setmode
4518 check_func_headers stdlib.h getenv
4519
4520 check_func_headers windows.h CoTaskMemFree -lole32
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_libs; }||
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_libs $xcb_shm_libs $xcb_xfixes_libs"
4777 fi
4778
4779 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4780
4781 enabled vaapi &&
4782     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4783     disable vaapi
4784
4785 enabled vaapi &&
4786     check_lib "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4787     enable vaapi_drm
4788
4789 enabled vaapi &&
4790     check_lib "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11 &&
4791     enable vaapi_x11
4792
4793 enabled vdpau &&
4794     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4795     disable vdpau
4796
4797 enabled vdpau &&
4798     check_lib "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11 &&
4799     enable vdpau_x11
4800
4801 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4802
4803 # add some useful compiler flags if supported
4804 check_cflags -Wdeclaration-after-statement
4805 check_cflags -Wall
4806 check_cflags -Wdisabled-optimization
4807 check_cflags -Wpointer-arith
4808 check_cflags -Wredundant-decls
4809 check_cflags -Wwrite-strings
4810 check_cflags -Wtype-limits
4811 check_cflags -Wundef
4812 check_cflags -Wmissing-prototypes
4813 check_cflags -Wstrict-prototypes
4814
4815 if enabled extra_warnings; then
4816     check_cflags -Wcast-qual
4817     check_cflags -Wextra
4818     check_cflags -Wpedantic
4819 fi
4820
4821 check_disable_warning(){
4822     warning_flag=-W${1#-Wno-}
4823     test_cflags $warning_flag && add_cflags $1
4824 }
4825
4826 check_disable_warning -Wno-parentheses
4827 check_disable_warning -Wno-switch
4828 check_disable_warning -Wno-format-zero-length
4829 check_disable_warning -Wno-pointer-sign
4830
4831 check_disable_warning_headers(){
4832     warning_flag=-W${1#-Wno-}
4833     test_cflags $warning_flag && add_cflags_headers $1
4834 }
4835
4836 check_disable_warning_headers -Wno-deprecated-declarations
4837 check_disable_warning_headers -Wno-unused-variable
4838
4839 check_objcflags -fobjc-arc && enable objc_arc
4840
4841 # add some linker flags
4842 check_ldflags -Wl,--warn-common
4843 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4844 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4845 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4846
4847 # add some strip flags
4848 # -wN '..@*' is more selective than -x, but not available everywhere.