261200d51123e85e67f7cb40f29909aba26533e9
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix]
82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
85   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89   --enable-rpath           use rpath when linking programs [USE WITH CARE]
90
91 Licensing options:
92   --enable-gpl             allow use of GPL code, the resulting libs
93                            and binaries will be under GPL [no]
94   --enable-version3        upgrade (L)GPL to version 3 [no]
95   --enable-nonfree         allow use of nonfree code, the resulting libs
96                            and binaries will be unredistributable [no]
97
98 Configuration options:
99   --disable-static         do not build static libraries [no]
100   --enable-shared          build shared libraries [no]
101   --enable-small           optimize for size instead of speed
102   --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
103   --enable-gray            enable full grayscale support (slower color)
104   --disable-swscale-alpha  disable alpha channel support in swscale
105   --disable-all            disable building components, libraries and programs
106
107 Program options:
108   --disable-programs       do not build command line programs
109   --disable-avconv         disable avconv build
110   --disable-avplay         disable avplay build
111   --disable-avprobe        disable avprobe build
112   --disable-avserver       deprecated, does nothing
113
114 Component options:
115   --disable-doc            do not build documentation
116   --disable-avdevice       disable libavdevice build
117   --disable-avcodec        disable libavcodec build
118   --disable-avformat       disable libavformat build
119   --disable-avutil         disable libavutil build
120   --disable-swscale        disable libswscale build
121   --disable-avfilter       disable video filter support [no]
122   --disable-avresample     disable libavresample build [no]
123   --disable-pthreads       disable pthreads [auto]
124   --disable-w32threads     disable Win32 threads [auto]
125   --disable-network        disable network support [no]
126   --disable-dct            disable DCT code
127   --disable-error-resilience disable error resilience code
128   --disable-lsp            disable LSP code
129   --disable-lzo            disable LZO decoder code
130   --disable-mdct           disable MDCT code
131   --disable-rdft           disable RDFT code
132   --disable-fft            disable FFT code
133   --disable-faan           disable floating point AAN (I)DCT code
134
135 Individual component options:
136   --disable-everything     disable all components listed below
137   --disable-encoder=NAME   disable encoder NAME
138   --enable-encoder=NAME    enable encoder NAME
139   --disable-encoders       disable all encoders
140   --disable-decoder=NAME   disable decoder NAME
141   --enable-decoder=NAME    enable decoder NAME
142   --disable-decoders       disable all decoders
143   --disable-hwaccel=NAME   disable hwaccel NAME
144   --enable-hwaccel=NAME    enable hwaccel NAME
145   --disable-hwaccels       disable all hwaccels
146   --disable-muxer=NAME     disable muxer NAME
147   --enable-muxer=NAME      enable muxer NAME
148   --disable-muxers         disable all muxers
149   --disable-demuxer=NAME   disable demuxer NAME
150   --enable-demuxer=NAME    enable demuxer NAME
151   --disable-demuxers       disable all demuxers
152   --enable-parser=NAME     enable parser NAME
153   --disable-parser=NAME    disable parser NAME
154   --disable-parsers        disable all parsers
155   --enable-bsf=NAME        enable bitstream filter NAME
156   --disable-bsf=NAME       disable bitstream filter NAME
157   --disable-bsfs           disable all bitstream filters
158   --enable-protocol=NAME   enable protocol NAME
159   --disable-protocol=NAME  disable protocol NAME
160   --disable-protocols      disable all protocols
161   --enable-indev=NAME      enable input device NAME
162   --disable-indev=NAME     disable input device NAME
163   --disable-indevs         disable input devices
164   --enable-outdev=NAME     enable output device NAME
165   --disable-outdev=NAME    disable output device NAME
166   --disable-outdevs        disable output devices
167   --disable-devices        disable all devices
168   --enable-filter=NAME     enable filter NAME
169   --disable-filter=NAME    disable filter NAME
170   --disable-filters        disable all filters
171
172 External library support:
173
174   Using any of the following switches will allow Libav to link to the
175   corresponding external library. All the components depending on that library
176   will become enabled, if all their other dependencies are met and they are not
177   explicitly disabled. E.g. --enable-libwavpack will enable linking to
178   libwavpack and allow the libwavpack encoder to be built, unless it is
179   specifically disabled with --disable-encoder=libwavpack.
180
181   Note that only the system libraries are auto-detected. All the other external
182   libraries must be explicitly enabled.
183
184   Also note that the following help text describes the purpose of the libraries
185   themselves, not all their features will necessarily be usable by Libav.
186
187   --enable-avisynth          video frameserver
188   --enable-bzlib             bzip2 compression [autodetect]
189   --enable-frei0r            video filtering plugins
190   --enable-gnutls            crypto
191   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
192   --enable-libcdio           audio CD input
193   --enable-libdc1394         IEEE 1394/Firewire camera input
194   --enable-libdcadec         DCA audio decoding
195   --enable-libfaac           AAC audio encoding
196   --enable-libfdk-aac        AAC audio encoding/decoding
197   --enable-libfontconfig     font configuration and management
198   --enable-libfreetype       font rendering
199   --enable-libgsm            GSM audio encoding/decoding
200   --enable-libilbc           ILBC audio encoding/decoding
201   --enable-libkvazaar        HEVC video encoding
202   --enable-libmp3lame        MP3 audio encoding
203   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
204   --enable-libopencore-amrwb AMR-WB audio decoding
205   --enable-libopencv         computer vision
206   --enable-libopenh264       H.264 video encoding/decoding
207   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
208   --enable-libopus           Opus audio encoding/decoding
209   --enable-libpulse          Pulseaudio sound server
210   --enable-librtmp           RTMP streaming
211   --enable-libschroedinger   Dirac video encoding/decoding
212   --enable-libsnappy         snappy compression
213   --enable-libspeex          Speex audio encoding/decoding
214   --enable-libtheora         Theora video encoding/decoding
215   --enable-libtwolame        MP2 audio encoding
216   --enable-libvo-aacenc      AAC audio encoding
217   --enable-libvo-amrwbenc    AMR-WB audio encoding
218   --enable-libvorbis         Vorbis audio encoding/decoding
219   --enable-libvpx            VP* video encoding/decoding
220   --enable-libwavpack        Wavpack audio encoding/decoding
221   --enable-libwebp           WebP image encoding/decoding
222   --enable-libx264           H.264 video encoding
223   --enable-libx265           HEVC video encoding
224   --enable-libxavs           Chinese AVS video encoding
225   --enable-libxcb            X window system protocol communication
226   --enable-libxcb-shm        X11 shm communication [auto]
227   --enable-libxcb-xfixes     X11 mouse rendering [auto]
228   --enable-libxvid           MPEG-4 ASP video encoding
229   --enable-openssl           crypto
230   --enable-x11grab           X11 grabbing through xlib (legacy, use xcb instead)
231   --enable-zlib              compression [autodetect]
232
233   The following libraries provide various hardware acceleration features:
234   --enable-cuda    Nvidia CUDA (dynamically linked)
235   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
236   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
237   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
238   --enable-libnpp  Nvidia CUDA processing
239   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
240   --enable-nvenc   Nvidia video encoding
241   --enable-omx     OpenMAX IL
242   --enable-omx-rpi OpenMAX IL for Raspberry Pi
243   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
244   --enable-vda     Apple Video Decode Acceleration [auto]
245   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
246
247 Toolchain options:
248   --arch=ARCH              select architecture [$arch]
249   --cpu=CPU                select the minimum required CPU (affects
250                            instruction selection, may crash on older CPUs)
251   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
252   --enable-cross-compile   assume a cross-compiler is used
253   --sysroot=PATH           root of cross-build tree
254   --sysinclude=PATH        location of cross-build system headers
255   --target-os=OS           compiler targets OS [$target_os]
256   --target-exec=CMD        command to run executables on target
257   --target-path=DIR        path to view of build directory on target
258   --target-samples=DIR     path to samples directory on target
259   --toolchain=NAME         set tool defaults according to NAME
260   --nm=NM                  use nm tool
261   --ar=AR                  use archive tool AR [$ar_default]
262   --as=AS                  use assembler AS [$as_default]
263   --cc=CC                  use C compiler CC [$cc_default]
264   --objcc=OCC              use ObjC compiler OCC [$cc_default]
265   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
266   --ld=LD                  use linker LD
267   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
268   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
269   --host-cc=HOSTCC         use host C compiler HOSTCC
270   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
271   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
272   --host-ld=HOSTLD         use host linker HOSTLD
273   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
274   --host-libs=HLIBS        use libs HLIBS when linking for host
275   --host-os=OS             compiler host OS [$target_os]
276   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
277   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
278   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
279   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
280   --extra-libs=ELIBS       add ELIBS [$ELIBS]
281   --extra-version=STRING   version string suffix []
282   --optflags=OPTFLAGS      override optimization-related compiler flags
283   --build-suffix=SUFFIX    library name suffix []
284   --enable-pic             build position-independent code
285   --enable-thumb           compile for Thumb instruction set
286   --enable-lto             use link-time optimization
287   --env="ENV=override"     override the environment variables
288
289 Advanced options (experts only):
290   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
291   --custom-allocator=NAME  use a supported custom allocator
292   --disable-symver         disable symbol versioning
293   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
294   --disable-safe-bitstream-reader
295                            disable buffer boundary checking in bitreaders
296                            (faster, but may crash)
297   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
298   --enable-sram            allow use of on-chip SRAM
299
300 Optimization options (experts only):
301   --disable-asm            disable all assembly optimizations
302   --disable-altivec        disable AltiVec optimizations
303   --disable-vsx            disable VSX optimizations
304   --disable-power8         disable POWER8 optimizations
305   --disable-amd3dnow       disable 3DNow! optimizations
306   --disable-amd3dnowext    disable 3DNow! extended optimizations
307   --disable-mmx            disable MMX optimizations
308   --disable-mmxext         disable MMXEXT optimizations
309   --disable-sse            disable SSE optimizations
310   --disable-sse2           disable SSE2 optimizations
311   --disable-sse3           disable SSE3 optimizations
312   --disable-ssse3          disable SSSE3 optimizations
313   --disable-sse4           disable SSE4 optimizations
314   --disable-sse42          disable SSE4.2 optimizations
315   --disable-avx            disable AVX optimizations
316   --disable-xop            disable XOP optimizations
317   --disable-fma3           disable FMA3 optimizations
318   --disable-fma4           disable FMA4 optimizations
319   --disable-avx2           disable AVX2 optimizations
320   --disable-armv5te        disable armv5te optimizations
321   --disable-armv6          disable armv6 optimizations
322   --disable-armv6t2        disable armv6t2 optimizations
323   --disable-vfp            disable VFP optimizations
324   --disable-neon           disable NEON optimizations
325   --disable-inline-asm     disable use of inline assembly
326   --disable-yasm           disable use of nasm/yasm assembly
327
328 Developer options (useful when working on Libav itself):
329   --disable-debug          disable debugging symbols
330   --enable-debug=LEVEL     set the debug level [$debuglevel]
331   --disable-optimizations  disable compiler optimizations
332   --enable-extra-warnings  enable more compiler warnings
333   --samples=PATH           location of test samples for FATE, if not set use
334                            \$LIBAV_SAMPLES at make invocation time.
335   --enable-neon-clobber-test check NEON registers for clobbering (should be
336                            used only for debugging purposes)
337   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
338                            should be used only for debugging purposes)
339   --enable-random          randomly enable/disable components
340   --disable-random
341   --enable-random=LIST     randomly enable/disable specific components or
342   --disable-random=LIST    component groups. LIST is a comma-separated list
343                            of NAME[:PROB] entries where NAME is a component
344                            (group) and PROB the probability associated with
345                            NAME (default 0.5).
346   --random-seed=VALUE      seed value for --enable/disable-random
347   --disable-valgrind-backtrace do not print a backtrace under Valgrind
348                            (only applies to --disable-optimizations builds)
349
350 NOTE: Object files are built at the place where configure is launched.
351 EOF
352   exit 0
353 }
354
355 quotes='""'
356
357 log(){
358     echo "$@" >> $logfile
359 }
360
361 log_file(){
362     log BEGIN $1
363     i=1
364     while read line; do
365         printf '%5s   %s\n' "${i}" "${line}"
366         i=$(($i+1))
367     done < $1 >> $logfile
368     log END $1
369 }
370
371 echolog(){
372     log "$@"
373     echo "$@"
374 }
375
376 warn(){
377     log "WARNING: $*"
378     WARNINGS="${WARNINGS}WARNING: $*\n"
379 }
380
381 die(){
382     echolog "$@"
383     cat <<EOF
384
385 If you think configure made a mistake, make sure you are using the latest
386 version from Git.  If the latest version fails, report the problem to the
387 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
388 EOF
389     if disabled logging; then
390         cat <<EOF
391 Rerun configure with logging enabled (do not use --disable-logging), and
392 include the log this produces with your report.
393 EOF
394     else
395         cat <<EOF
396 Include the log file "$logfile" produced by configure as this will help
397 solving the problem.
398 EOF
399     fi
400     exit 1
401 }
402
403 # Avoid locale weirdness, besides we really just want to translate ASCII.
404 toupper(){
405     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
406 }
407
408 tolower(){
409     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
410 }
411
412 c_escape(){
413     echo "$*" | sed 's/["\\]/\\\0/g'
414 }
415
416 sh_quote(){
417     v=$(echo "$1" | sed "s/'/'\\\\''/g")
418     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
419     echo "$v"
420 }
421
422 cleanws(){
423     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
424 }
425
426 filter(){
427     pat=$1
428     shift
429     for v; do
430         eval "case $v in $pat) echo $v ;; esac"
431     done
432 }
433
434 filter_out(){
435     pat=$1
436     shift
437     for v; do
438         eval "case $v in $pat) ;; *) echo $v ;; esac"
439     done
440 }
441
442 map(){
443     m=$1
444     shift
445     for v; do eval $m; done
446 }
447
448 add_suffix(){
449     suffix=$1
450     shift
451     for v; do echo ${v}${suffix}; done
452 }
453
454 set_all(){
455     value=$1
456     shift
457     for var in $*; do
458         eval $var=$value
459     done
460 }
461
462 set_weak(){
463     value=$1
464     shift
465     for var; do
466         eval : \${$var:=$value}
467     done
468 }
469
470 sanitize_var_name(){
471     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
472 }
473
474 set_safe(){
475     var=$1
476     shift
477     eval $(sanitize_var_name "$var")='$*'
478 }
479
480 get_safe(){
481     eval echo \$$(sanitize_var_name "$1")
482 }
483
484 pushvar(){
485     for pvar in $*; do
486         eval level=\${${pvar}_level:=0}
487         eval ${pvar}_${level}="\$$pvar"
488         eval ${pvar}_level=$(($level+1))
489     done
490 }
491
492 popvar(){
493     for pvar in $*; do
494         eval level=\${${pvar}_level:-0}
495         test $level = 0 && continue
496         eval level=$(($level-1))
497         eval $pvar="\${${pvar}_${level}}"
498         eval ${pvar}_level=$level
499         eval unset ${pvar}_${level}
500     done
501 }
502
503 enable(){
504     set_all yes $*
505 }
506
507 disable(){
508     set_all no $*
509 }
510
511 enable_weak(){
512     set_weak yes $*
513 }
514
515 disable_weak(){
516     set_weak no $*
517 }
518
519 enable_safe(){
520     for var; do
521         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
522     done
523 }
524
525 disable_safe(){
526     for var; do
527         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
528     done
529 }
530
531 do_enable_deep(){
532     for var; do
533         enabled $var && continue
534         eval sel="\$${var}_select"
535         eval sgs="\$${var}_suggest"
536         pushvar var sgs
537         enable_deep $sel
538         popvar sgs
539         enable_deep_weak $sgs
540         popvar var
541     done
542 }
543
544 enable_deep(){
545     do_enable_deep $*
546     enable $*
547 }
548
549 enable_deep_weak(){
550     for var; do
551         disabled $var && continue
552         pushvar var
553         do_enable_deep $var
554         popvar var
555         enable_weak $var
556     done
557 }
558
559 enabled(){
560     test "${1#!}" = "$1" && op== || op=!=
561     eval test "x\$${1#!}" $op "xyes"
562 }
563
564 disabled(){
565     test "${1#!}" = "$1" && op== || op=!=
566     eval test "x\$${1#!}" $op "xno"
567 }
568
569 enabled_all(){
570     for opt; do
571         enabled $opt || return 1
572     done
573 }
574
575 disabled_all(){
576     for opt; do
577         disabled $opt || return 1
578     done
579 }
580
581 enabled_any(){
582     for opt; do
583         enabled $opt && return 0
584     done
585 }
586
587 disabled_any(){
588     for opt; do
589         disabled $opt && return 0
590     done
591     return 1
592 }
593
594 set_default(){
595     for opt; do
596         eval : \${$opt:=\$${opt}_default}
597     done
598 }
599
600 is_in(){
601     value=$1
602     shift
603     for var in $*; do
604         [ $var = $value ] && return 0
605     done
606     return 1
607 }
608
609 do_check_deps(){
610     for cfg; do
611         cfg="${cfg#!}"
612         enabled ${cfg}_checking && die "Circular dependency for $cfg."
613         disabled ${cfg}_checking && continue
614         enable ${cfg}_checking
615         append allopts $cfg
616
617         eval dep_all="\$${cfg}_deps"
618         eval dep_any="\$${cfg}_deps_any"
619         eval dep_sel="\$${cfg}_select"
620         eval dep_sgs="\$${cfg}_suggest"
621         eval dep_ifa="\$${cfg}_if"
622         eval dep_ifn="\$${cfg}_if_any"
623
624         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
625         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
626         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
627
628         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
629         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
630         enabled_all  $dep_all || disable $cfg
631         enabled_any  $dep_any || disable $cfg
632         disabled_any $dep_sel && disable $cfg
633
634         if enabled $cfg; then
635             enable_deep $dep_sel
636             enable_deep_weak $dep_sgs
637         fi
638
639         disable ${cfg}_checking
640     done
641 }
642
643 check_deps(){
644     unset allopts
645
646     do_check_deps "$@"
647
648     for cfg in $allopts; do
649         enabled $cfg || continue
650         eval dep_extralibs="\$${cfg}_extralibs"
651         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
652     done
653 }
654
655 print_config(){
656     pfx=$1
657     files=$2
658     shift 2
659     map 'eval echo "$v \${$v:-no}"' "$@" |
660     awk "BEGIN { split(\"$files\", files) }
661         {
662             c = \"$pfx\" toupper(\$1);
663             v = \$2;
664             sub(/yes/, 1, v);
665             sub(/no/,  0, v);
666             for (f in files) {
667                 file = files[f];
668                 if (file ~ /\\.h\$/) {
669                     printf(\"#define %s %d\\n\", c, v) >>file;
670                 } else if (file ~ /\\.asm\$/) {
671                     printf(\"%%define %s %d\\n\", c, v) >>file;
672                 } else if (file ~ /\\.mak\$/) {
673                     n = -v ? \"\" : \"!\";
674                     printf(\"%s%s=yes\\n\", n, c) >>file;
675                 }
676             }
677         }"
678 }
679
680 print_enabled(){
681     suf=$1
682     shift
683     for v; do
684         enabled $v && printf "%s\n" ${v%$suf}
685     done
686 }
687
688 append(){
689     var=$1
690     shift
691     eval "$var=\"\$$var $*\""
692 }
693
694 prepend(){
695     var=$1
696     shift
697     eval "$var=\"$* \$$var\""
698 }
699
700 unique(){
701     var=$1
702     uniq_list=""
703     for tok in $(eval echo \$$var); do
704         uniq_list="$(filter_out $tok $uniq_list) $tok"
705     done
706     eval "$var=\"${uniq_list}\""
707 }
708
709 add_cppflags(){
710     append CPPFLAGS "$@"
711 }
712
713 add_cflags(){
714     append CFLAGS $($cflags_filter "$@")
715 }
716
717 add_asflags(){
718     append ASFLAGS $($asflags_filter "$@")
719 }
720
721 add_objcflags(){
722     append OBJCFLAGS $($objcflags_filter "$@")
723 }
724
725 add_ldflags(){
726     append LDFLAGS $($ldflags_filter "$@")
727 }
728
729 add_ldexeflags(){
730     append LDEXEFLAGS $($ldflags_filter "$@")
731 }
732
733 add_stripflags(){
734     append STRIPFLAGS "$@"
735 }
736
737 add_extralibs(){
738     prepend extralibs $($ldflags_filter "$@")
739 }
740
741 add_host_cppflags(){
742     append host_cppflags "$@"
743 }
744
745 add_host_cflags(){
746     append host_cflags $($host_cflags_filter "$@")
747 }
748
749 add_host_ldflags(){
750     append host_ldflags $($host_ldflags_filter "$@")
751 }
752
753 add_compat(){
754     append compat_objs $1
755     shift
756     map 'add_cppflags -D$v' "$@"
757 }
758
759 check_cmd(){
760     log "$@"
761     "$@" >> $logfile 2>&1
762 }
763
764 cc_o(){
765     eval printf '%s\\n' $CC_O
766 }
767
768 cc_e(){
769     eval printf '%s\\n' $CC_E
770 }
771
772 check_cc(){
773     log check_cc "$@"
774     cat > $TMPC
775     log_file $TMPC
776     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
777 }
778
779 check_objcc(){
780     log check_objcc "$@"
781     cat > $TMPC
782     log_file $TMPC
783     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
784 }
785
786 check_cpp(){
787     log check_cpp "$@"
788     cat > $TMPC
789     log_file $TMPC
790     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
791 }
792
793 as_o(){
794     eval printf '%s\\n' $AS_O
795 }
796
797 check_as(){
798     log check_as "$@"
799     cat > $TMPS
800     log_file $TMPS
801     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
802 }
803
804 check_inline_asm(){
805     log check_inline_asm "$@"
806     name="$1"
807     code="$2"
808     shift 2
809     disable $name
810     check_cc "$@" <<EOF && enable $name
811 void foo(void){ __asm__ volatile($code); }
812 EOF
813 }
814
815 check_insn(){
816     log check_insn "$@"
817     check_inline_asm ${1}_inline "\"$2\""
818     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
819 }
820
821 check_yasm(){
822     log check_yasm "$@"
823     echo "$1" > $TMPS
824     log_file $TMPS
825     shift 1
826     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
827 }
828
829 ld_o(){
830     eval printf '%s\\n' $LD_O
831 }
832
833 check_ld(){
834     log check_ld "$@"
835     flags=$(filter_out '-l*' "$@")
836     libs=$(filter '-l*' "$@")
837     check_cc $($cflags_filter $flags) || return
838     flags=$($ldflags_filter $flags)
839     libs=$($ldflags_filter $libs)
840     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
841 }
842
843 print_include(){
844     hdr=$1
845     test "${hdr%.h}" = "${hdr}" &&
846         echo "#include $hdr"    ||
847         echo "#include <$hdr>"
848 }
849
850 check_code(){
851     log check_code "$@"
852     check=$1
853     headers=$2
854     code=$3
855     shift 3
856     {
857         for hdr in $headers; do
858             print_include $hdr
859         done
860         echo "int main(void) { $code; return 0; }"
861     } | check_$check "$@"
862 }
863
864 check_cppflags(){
865     log check_cppflags "$@"
866     check_cc "$@" <<EOF && append CPPFLAGS "$@"
867 int x;
868 EOF
869 }
870
871 test_cflags(){
872     log test_cflags "$@"
873     set -- $($cflags_filter "$@")
874     check_cc "$@" <<EOF
875 int x;
876 EOF
877 }
878
879 check_cflags(){
880     log check_cflags "$@"
881     test_cflags "$@" && add_cflags "$@"
882 }
883
884 test_objcflags(){
885     log test_cflags "$@"
886     set -- $($cflags_filter "$@")
887     check_objcc "$@" <<EOF
888 int x;
889 EOF
890 }
891
892 check_objcflags(){
893     log check_cflags "$@"
894     test_objcflags "$@" && add_objcflags "$@"
895 }
896
897 test_ldflags(){
898     log test_ldflags "$@"
899     check_ld "$@" <<EOF
900 int main(void){ return 0; }
901 EOF
902 }
903
904 check_ldflags(){
905     log check_ldflags "$@"
906     test_ldflags "$@" && add_ldflags "$@"
907 }
908
909 test_stripflags(){
910     log test_stripflags "$@"
911     # call check_cc to get a fresh TMPO
912     check_cc <<EOF
913 int main(void) { return 0; }
914 EOF
915     check_cmd $strip $STRIPFLAGS "$@" $TMPO
916 }
917
918 check_stripflags(){
919     log check_stripflags "$@"
920     test_stripflags "$@" && add_stripflags "$@"
921 }
922
923 check_header(){
924     log check_header "$@"
925     header=$1
926     shift
927     disable_safe $header
928     check_cpp "$@" <<EOF && enable_safe $header
929 #include <$header>
930 int x;
931 EOF
932 }
933
934 check_func(){
935     log check_func "$@"
936     func=$1
937     shift
938     disable $func
939     check_ld "$@" <<EOF && enable $func
940 extern int $func();
941 int main(void){ $func(); }
942 EOF
943 }
944
945 check_mathfunc(){
946     log check_mathfunc "$@"
947     func=$1
948     narg=$2
949     shift 2
950     test $narg = 2 && args="f, g" || args="f"
951     disable $func
952     check_ld "$@" <<EOF && enable $func
953 #include <math.h>
954 float foo(float f, float g) { return $func($args); }
955 int main(void){ return 0; }
956 EOF
957 }
958
959 check_func_headers(){
960     log check_func_headers "$@"
961     headers=$1
962     funcs=$2
963     shift 2
964     {
965         for hdr in $headers; do
966             print_include $hdr
967         done
968         for func in $funcs; do
969             echo "long check_$func(void) { return (long) $func; }"
970         done
971         echo "int main(void) { return 0; }"
972     } | check_ld "$@" && enable $funcs && enable_safe $headers
973 }
974
975 check_cpp_condition(){
976     log check_cpp_condition "$@"
977     header=$1
978     condition=$2
979     shift 2
980     check_cpp "$@" <<EOF
981 #include <$header>
982 #if !($condition)
983 #error "unsatisfied condition: $condition"
984 #endif
985 EOF
986 }
987
988 check_lib(){
989     log check_lib "$@"
990     header="$1"
991     func="$2"
992     shift 2
993     check_header $header && check_func $func "$@" && add_extralibs "$@"
994 }
995
996 check_lib2(){
997     log check_lib2 "$@"
998     headers="$1"
999     funcs="$2"
1000     shift 2
1001     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1002 }
1003
1004 check_pkg_config(){
1005     log check_pkg_config "$@"
1006     pkg="$1"
1007     headers="$2"
1008     funcs="$3"
1009     shift 3
1010     check_cmd $pkg_config --exists --print-errors $pkg || return
1011     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1012     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1013     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1014         set_safe "${pkg}_cflags" $pkg_cflags   &&
1015         set_safe "${pkg}_libs"   $pkg_libs
1016 }
1017
1018 check_exec(){
1019     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1020 }
1021
1022 check_exec_crash(){
1023     code=$(cat)
1024
1025     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1026     # are safe but may not be available everywhere.  Thus we use
1027     # raise(SIGTERM) instead.  The check is run in a subshell so we
1028     # can redirect the "Terminated" message from the shell.  SIGBUS
1029     # is not defined by standard C so it is used conditionally.
1030
1031     (check_exec "$@") >> $logfile 2>&1 <<EOF
1032 #include <signal.h>
1033 static void sighandler(int sig){
1034     raise(SIGTERM);
1035 }
1036 int foo(void){
1037     $code
1038 }
1039 int (*func_ptr)(void) = foo;
1040 int main(void){
1041     signal(SIGILL, sighandler);
1042     signal(SIGFPE, sighandler);
1043     signal(SIGSEGV, sighandler);
1044 #ifdef SIGBUS
1045     signal(SIGBUS, sighandler);
1046 #endif
1047     return func_ptr();
1048 }
1049 EOF
1050 }
1051
1052 check_type(){
1053     log check_type "$@"
1054     headers=$1
1055     type=$2
1056     shift 2
1057     disable_safe "$type"
1058     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1059 }
1060
1061 check_struct(){
1062     log check_struct "$@"
1063     headers=$1
1064     struct=$2
1065     member=$3
1066     shift 3
1067     disable_safe "${struct}_${member}"
1068     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1069         enable_safe "${struct}_${member}"
1070 }
1071
1072 check_builtin(){
1073     log check_builtin "$@"
1074     name=$1
1075     headers=$2
1076     builtin=$3
1077     shift 3
1078     disable "$name"
1079     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1080 }
1081
1082 check_compile_assert(){
1083     log check_compile_assert "$@"
1084     name=$1
1085     headers=$2
1086     condition=$3
1087     shift 3
1088     disable "$name"
1089     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1090 }
1091
1092 require(){
1093     name="$1"
1094     header="$2"
1095     func="$3"
1096     shift 3
1097     check_lib $header $func "$@" || die "ERROR: $name not found"
1098 }
1099
1100 require2(){
1101     name="$1"
1102     headers="$2"
1103     func="$3"
1104     shift 3
1105     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1106 }
1107
1108 require_pkg_config(){
1109     pkg="$1"
1110     check_pkg_config "$@" || die "ERROR: $pkg not found"
1111     add_cflags    $(get_safe "${pkg}_cflags")
1112     add_extralibs $(get_safe "${pkg}_libs")
1113 }
1114
1115 hostcc_e(){
1116     eval printf '%s\\n' $HOSTCC_E
1117 }
1118
1119 hostcc_o(){
1120     eval printf '%s\\n' $HOSTCC_O
1121 }
1122
1123 check_host_cc(){
1124     log check_host_cc "$@"
1125     cat > $TMPC
1126     log_file $TMPC
1127     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1128 }
1129
1130 check_host_cpp(){
1131     log check_host_cpp "$@"
1132     cat > $TMPC
1133     log_file $TMPC
1134     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1135 }
1136
1137 check_host_cppflags(){
1138     log check_host_cppflags "$@"
1139     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1140 int x;
1141 EOF
1142 }
1143
1144 check_host_cflags(){
1145     log check_host_cflags "$@"
1146     set -- $($host_cflags_filter "$@")
1147     check_host_cc "$@" <<EOF && append host_cflags "$@"
1148 int x;
1149 EOF
1150 }
1151
1152 check_host_cpp_condition(){
1153     log check_host_cpp_condition "$@"
1154     header=$1
1155     condition=$2
1156     shift 2
1157     check_host_cpp "$@" <<EOF
1158 #include <$header>
1159 #if !($condition)
1160 #error "unsatisfied condition: $condition"
1161 #endif
1162 EOF
1163 }
1164
1165 apply(){
1166     file=$1
1167     shift
1168     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1169 }
1170
1171 cp_if_changed(){
1172     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1173     mkdir -p "$(dirname $2)"
1174     $cp_f "$1" "$2"
1175 }
1176
1177 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1178 # system-dependent things.
1179
1180 AVCODEC_COMPONENTS="
1181     bsfs
1182     decoders
1183     encoders
1184     hwaccels
1185     parsers
1186 "
1187
1188 AVDEVICE_COMPONENTS="
1189     indevs
1190     outdevs
1191 "
1192 AVFILTER_COMPONENTS="
1193     filters
1194 "
1195 AVFORMAT_COMPONENTS="
1196     demuxers
1197     muxers
1198     protocols
1199 "
1200
1201 AVRESAMPLE_COMPONENTS=""
1202 AVUTIL_COMPONENTS=""
1203
1204 COMPONENT_LIST="
1205     $AVCODEC_COMPONENTS
1206     $AVDEVICE_COMPONENTS
1207     $AVFILTER_COMPONENTS
1208     $AVFORMAT_COMPONENTS
1209     $AVRESAMPLE_COMPONENTS
1210     $AVUTIL_COMPONENTS
1211 "
1212
1213 EXAMPLE_LIST="
1214     avcodec_example
1215     filter_audio_example
1216     metadata_example
1217     output_example
1218     qsvdec_example
1219     transcode_aac_example
1220 "
1221
1222 HWACCEL_LIBRARY_LIST="
1223     cuda
1224     d3d11va
1225     dxva2
1226     libmfx
1227     libnpp
1228     mmal
1229     nvenc
1230     omx
1231     vaapi
1232     vda
1233     vdpau
1234 "
1235
1236 EXTERNAL_LIBRARY_LIST="
1237     avisynth
1238     bzlib
1239     frei0r
1240     gnutls
1241     libbs2b
1242     libcdio
1243     libdc1394
1244     libdcadec
1245     libfaac
1246     libfdk_aac
1247     libfontconfig
1248     libfreetype
1249     libgsm
1250     libilbc
1251     libkvazaar
1252     libmp3lame
1253     libopencore_amrnb
1254     libopencore_amrwb
1255     libopencv
1256     libopenh264
1257     libopenjpeg
1258     libopus
1259     libpulse
1260     librtmp
1261     libschroedinger
1262     libsnappy
1263     libspeex
1264     libtheora
1265     libtwolame
1266     libvo_aacenc
1267     libvo_amrwbenc
1268     libvorbis
1269     libvpx
1270     libwavpack
1271     libwebp
1272     libx264
1273     libx265
1274     libxavs
1275     libxcb
1276     libxcb_shm
1277     libxcb_xfixes
1278     libxvid
1279     openssl
1280     x11grab
1281     zlib
1282 "
1283
1284 FEATURE_LIST="
1285     gray
1286     hardcoded_tables
1287     omx_rpi
1288     runtime_cpudetect
1289     safe_bitstream_reader
1290     shared
1291     small
1292     sram
1293     static
1294     swscale_alpha
1295 "
1296
1297 LIBRARY_LIST="
1298     avcodec
1299     avdevice
1300     avfilter
1301     avformat
1302     avresample
1303     avutil
1304     swscale
1305 "
1306
1307 LICENSE_LIST="
1308     gpl
1309     nonfree
1310     version3
1311 "
1312
1313 PROGRAM_LIST="
1314     avconv
1315     avplay
1316     avprobe
1317 "
1318
1319 SUBSYSTEM_LIST="
1320     dct
1321     doc
1322     error_resilience
1323     faan
1324     fft
1325     lsp
1326     lzo
1327     mdct
1328     network
1329     rdft
1330 "
1331
1332 CONFIG_LIST="
1333     $COMPONENT_LIST
1334     $EXAMPLE_LIST
1335     $EXTERNAL_LIBRARY_LIST
1336     $HWACCEL_LIBRARY_LIST
1337     $FEATURE_LIST
1338     $LICENSE_LIST
1339     $LIBRARY_LIST
1340     $PROGRAM_LIST
1341     $SUBSYSTEM_LIST
1342     memalign_hack
1343     neon_clobber_test
1344     pic
1345     pod2man
1346     texi2html
1347     thumb
1348     valgrind_backtrace
1349     xmm_clobber_test
1350 "
1351
1352 THREADS_LIST="
1353     pthreads
1354     w32threads
1355 "
1356
1357 ATOMICS_LIST="
1358     atomics_gcc
1359     atomics_suncc
1360     atomics_win32
1361 "
1362
1363 ARCH_LIST="
1364     aarch64
1365     alpha
1366     arm
1367     avr32
1368     avr32_ap
1369     avr32_uc
1370     bfin
1371     ia64
1372     m68k
1373     mips
1374     mips64
1375     parisc
1376     ppc
1377     ppc64
1378     s390
1379     sh4
1380     sparc
1381     sparc64
1382     tilegx
1383     tilepro
1384     tomi
1385     x86
1386     x86_32
1387     x86_64
1388 "
1389
1390 ARCH_EXT_LIST_ARM="
1391     armv5te
1392     armv6
1393     armv6t2
1394     armv8
1395     neon
1396     vfp
1397     vfpv3
1398 "
1399
1400 ARCH_EXT_LIST_X86_SIMD="
1401     amd3dnow
1402     amd3dnowext
1403     avx
1404     avx2
1405     fma3
1406     fma4
1407     mmx
1408     mmxext
1409     sse
1410     sse2
1411     sse3
1412     sse4
1413     sse42
1414     ssse3
1415     xop
1416 "
1417
1418 ARCH_EXT_LIST_PPC="
1419     altivec
1420     dcbzl
1421     ldbrx
1422     power8
1423     ppc4xx
1424     vsx
1425 "
1426
1427 ARCH_EXT_LIST_X86="
1428     $ARCH_EXT_LIST_X86_SIMD
1429     cpunop
1430     i686
1431 "
1432
1433 ARCH_EXT_LIST_MIPS="
1434     loongson
1435     mips32r1
1436     mips64r1
1437     mips32r2
1438     mips64r2
1439     mips32r6
1440     mips64r6
1441 "
1442
1443 ARCH_EXT_LIST="
1444     $ARCH_EXT_LIST_ARM
1445     $ARCH_EXT_LIST_MIPS
1446     $ARCH_EXT_LIST_PPC
1447     $ARCH_EXT_LIST_X86
1448     vis
1449 "
1450
1451 ARCH_FEATURES="
1452     aligned_stack
1453     fast_64bit
1454     fast_clz
1455     fast_cmov
1456     local_aligned_8
1457     local_aligned_16
1458     simd_align_16
1459 "
1460
1461 BUILTIN_LIST="
1462     atomic_cas_ptr
1463     machine_rw_barrier
1464     MemoryBarrier
1465     mm_empty
1466     rdtsc
1467     sem_timedwait
1468     sync_val_compare_and_swap
1469 "
1470 HAVE_LIST_CMDLINE="
1471     inline_asm
1472     symver
1473     yasm
1474 "
1475
1476 HAVE_LIST_PUB="
1477     bigendian
1478     fast_unaligned
1479 "
1480
1481 HEADERS_LIST="
1482     AVFoundation_AVFoundation_h
1483     alsa_asoundlib_h
1484     altivec_h
1485     arpa_inet_h
1486     cdio_paranoia_h
1487     cdio_paranoia_paranoia_h
1488     dispatch_dispatch_h
1489     dev_bktr_ioctl_bt848_h
1490     dev_bktr_ioctl_meteor_h
1491     dev_ic_bt8xx_h
1492     dev_video_bktr_ioctl_bt848_h
1493     dev_video_meteor_ioctl_meteor_h
1494     direct_h
1495     dlfcn_h
1496     d3d11_h
1497     dxva_h
1498     gsm_h
1499     io_h
1500     mach_mach_time_h
1501     machine_ioctl_bt848_h
1502     machine_ioctl_meteor_h
1503     malloc_h
1504     poll_h
1505     sndio_h
1506     soundcard_h
1507     sys_mman_h
1508     sys_param_h
1509     sys_resource_h
1510     sys_select_h
1511     sys_soundcard_h
1512     sys_time_h
1513     sys_un_h
1514     sys_videoio_h
1515     unistd_h
1516     valgrind_valgrind_h
1517     windows_h
1518     winsock2_h
1519 "
1520
1521 INTRINSICS_LIST="
1522     intrinsics_neon
1523 "
1524
1525 MATH_FUNCS="
1526     atanf
1527     atan2f
1528     cbrtf
1529     cosf
1530     exp2
1531     exp2f
1532     expf
1533     isinf
1534     isnan
1535     ldexpf
1536     llrint
1537     llrintf
1538     log2
1539     log2f
1540     log10f
1541     lrint
1542     lrintf
1543     powf
1544     rint
1545     round
1546     roundf
1547     sinf
1548     trunc
1549     truncf
1550 "
1551
1552 SYSTEM_FUNCS="
1553     aligned_malloc
1554     clock_gettime
1555     closesocket
1556     CommandLineToArgvW
1557     CoTaskMemFree
1558     CryptGenRandom
1559     dlopen
1560     fcntl
1561     flt_lim
1562     fork
1563     getaddrinfo
1564     gethrtime
1565     getopt
1566     GetProcessAffinityMask
1567     GetProcessMemoryInfo
1568     GetProcessTimes
1569     getrusage
1570     GetSystemTimeAsFileTime
1571     gettimeofday
1572     gmtime_r
1573     inet_aton
1574     isatty
1575     jack_port_get_latency_range
1576     LoadLibrary
1577     localtime_r
1578     mach_absolute_time
1579     MapViewOfFile
1580     memalign
1581     mkstemp
1582     mmap
1583     mprotect
1584     nanosleep
1585     posix_memalign
1586     sched_getaffinity
1587     SetConsoleTextAttribute
1588     setmode
1589     setrlimit
1590     Sleep
1591     strerror_r
1592     sysconf
1593     sysctl
1594     usleep
1595     VirtualAlloc
1596 "
1597
1598 TOOLCHAIN_FEATURES="
1599     as_dn_directive
1600     as_func
1601     as_object_arch
1602     asm_mod_q
1603     attribute_may_alias
1604     attribute_packed
1605     ebp_available
1606     ebx_available
1607     gnu_as
1608     ibm_asm
1609     inline_asm_labels
1610     pragma_deprecated
1611     symver_asm_label
1612     symver_gnu_asm
1613     vfp_args
1614     xform_asm
1615     xmm_clobbers
1616 "
1617
1618 TYPES_LIST="
1619     CONDITION_VARIABLE_Ptr
1620     socklen_t
1621     struct_addrinfo
1622     struct_group_source_req
1623     struct_ip_mreq_source
1624     struct_ipv6_mreq
1625     struct_pollfd
1626     struct_rusage_ru_maxrss
1627     struct_sockaddr_in6
1628     struct_sockaddr_sa_len
1629     struct_sockaddr_storage
1630     struct_v4l2_frmivalenum_discrete
1631 "
1632
1633 HAVE_LIST="
1634     $ARCH_EXT_LIST
1635     $(add_suffix _external $ARCH_EXT_LIST)
1636     $(add_suffix _inline   $ARCH_EXT_LIST)
1637     $ARCH_FEATURES
1638     $ATOMICS_LIST
1639     $BUILTIN_LIST
1640     $HAVE_LIST_CMDLINE
1641     $HAVE_LIST_PUB
1642     $HEADERS_LIST
1643     $INTRINSICS_LIST
1644     $MATH_FUNCS
1645     $SYSTEM_FUNCS
1646     $THREADS_LIST
1647     $TOOLCHAIN_FEATURES
1648     $TYPES_LIST
1649     atomics_native
1650     dos_paths
1651     dxva2_lib
1652     libc_msvcrt
1653     libdc1394_1
1654     libdc1394_2
1655     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1656     sdl
1657     section_data_rel_ro
1658     threads
1659     vaapi_drm
1660     vaapi_x11
1661     vdpau_x11
1662     xlib
1663 "
1664
1665 # options emitted with CONFIG_ prefix but not available on the command line
1666 CONFIG_EXTRA="
1667     aandcttables
1668     ac3dsp
1669     audio_frame_queue
1670     audiodsp
1671     blockdsp
1672     bswapdsp
1673     cabac
1674     dirac_parse
1675     dvprofile
1676     faandct
1677     faanidct
1678     fdctdsp
1679     flacdsp
1680     fmtconvert
1681     g722dsp
1682     gcrypt
1683     gmp
1684     golomb
1685     gplv3
1686     h263dsp
1687     h264chroma
1688     h264dsp
1689     h264pred
1690     h264qpel
1691     hpeldsp
1692     huffman
1693     huffyuvdsp
1694     huffyuvencdsp
1695     idctdsp
1696     iirfilter
1697     imdct15
1698     intrax8
1699     iso_media
1700     ividsp
1701     jpegtables
1702     libx262
1703     lgplv3
1704     lpc
1705     lzf
1706     me_cmp
1707     mpeg_er
1708     mpegaudio
1709     mpegaudiodsp
1710     mpegvideo
1711     mpegvideoenc
1712     mss34dsp
1713     pixblockdsp
1714     qpeldsp
1715     qsv
1716     qsvdec
1717     qsvenc
1718     rangecoder
1719     riffdec
1720     riffenc
1721     rtpdec
1722     rtpenc_chain
1723     rv34dsp
1724     sinewin
1725     snappy
1726     srtp
1727     startcode
1728     texturedsp
1729     texturedspenc
1730     tpeldsp
1731     vaapi_encode
1732     vc1dsp
1733     videodsp
1734     vp3dsp
1735     vp56dsp
1736     vp8dsp
1737     wma_freqs
1738     wmv2dsp
1739 "
1740
1741 CMDLINE_SELECT="
1742     $ARCH_EXT_LIST
1743     $CONFIG_LIST
1744     $HAVE_LIST_CMDLINE
1745     $THREADS_LIST
1746     asm
1747     cross_compile
1748     debug
1749     extra_warnings
1750     logging
1751     lto
1752     optimizations
1753     rpath
1754 "
1755
1756 PATHS_LIST="
1757     bindir
1758     datadir
1759     docdir
1760     incdir
1761     libdir
1762     mandir
1763     prefix
1764     shlibdir
1765 "
1766
1767 CMDLINE_SET="
1768     $PATHS_LIST
1769     ar
1770     arch
1771     as
1772     build_suffix
1773     cc
1774     objcc
1775     cpu
1776     cross_prefix
1777     custom_allocator
1778     dep_cc
1779     env
1780     extra_version
1781     host_cc
1782     host_cflags
1783     host_ld
1784     host_ldflags
1785     host_libs
1786     host_os
1787     ld
1788     logfile
1789     malloc_prefix
1790     nm
1791     optflags
1792     pkg_config
1793     pkg_config_flags
1794     random_seed
1795     samples
1796     sysinclude
1797     sysroot
1798     target_exec
1799     target_os
1800     target_path
1801     target_samples
1802     toolchain
1803 "
1804
1805 CMDLINE_APPEND="
1806     extra_cflags
1807     extra_objcflags
1808     host_cppflags
1809 "
1810
1811 # code dependency declarations
1812
1813 # architecture extensions
1814
1815 armv5te_deps="arm"
1816 armv6_deps="arm"
1817 armv6t2_deps="arm"
1818 armv8_deps="aarch64"
1819 neon_deps_any="aarch64 arm"
1820 intrinsics_neon_deps="neon"
1821 vfp_deps_any="aarch64 arm"
1822 vfpv3_deps="vfp"
1823
1824 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1825
1826 altivec_deps="ppc"
1827 ppc4xx_deps="ppc"
1828 vsx_deps="altivec"
1829 power8_deps="vsx"
1830
1831 cpunop_deps="i686"
1832 x86_64_select="i686"
1833 x86_64_suggest="fast_cmov"
1834
1835 amd3dnow_deps="mmx"
1836 amd3dnowext_deps="amd3dnow"
1837 i686_deps="x86"
1838 mmx_deps="x86"
1839 mmxext_deps="mmx"
1840 sse_deps="mmxext"
1841 sse2_deps="sse"
1842 sse3_deps="sse2"
1843 ssse3_deps="sse3"
1844 sse4_deps="ssse3"
1845 sse42_deps="sse4"
1846 avx_deps="sse42"
1847 xop_deps="avx"
1848 fma3_deps="avx"
1849 fma4_deps="avx"
1850 avx2_deps="avx"
1851
1852 mmx_external_deps="yasm"
1853 mmx_inline_deps="inline_asm"
1854 mmx_suggest="mmx_external mmx_inline"
1855
1856 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1857     eval dep=\$${ext}_deps
1858     eval ${ext}_external_deps='"${dep}_external"'
1859     eval ${ext}_inline_deps='"${dep}_inline"'
1860     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1861 done
1862
1863 aligned_stack_if_any="aarch64 ppc x86"
1864 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1865 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1866 fast_unaligned_if_any="aarch64 ppc x86"
1867 simd_align_16_if_any="altivec neon sse"
1868
1869 # system capabilities
1870 symver_if_any="symver_asm_label symver_gnu_asm"
1871 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1872
1873 # threading support
1874 atomics_gcc_if="sync_val_compare_and_swap"
1875 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1876 atomics_win32_if="MemoryBarrier"
1877 atomics_native_if_any="$ATOMICS_LIST"
1878 w32threads_deps="atomics_native"
1879 threads_if_any="$THREADS_LIST"
1880
1881 # subsystems
1882 dct_select="rdft"
1883 dirac_parse_select="golomb"
1884 error_resilience_select="me_cmp"
1885 faandct_deps="faan fdctdsp"
1886 faanidct_deps="faan idctdsp"
1887 h264dsp_select="startcode"
1888 intrax8_select="blockdsp idctdsp"
1889 mdct_select="fft"
1890 rdft_select="fft"
1891 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1892 mpeg_er_select="error_resilience"
1893 mpegaudio_select="mpegaudiodsp"
1894 mpegaudiodsp_select="dct"
1895 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1896 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1897 vc1dsp_select="h264chroma qpeldsp startcode"
1898
1899 # decoders / encoders
1900 aac_decoder_select="imdct15 mdct sinewin"
1901 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1902 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1903 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1904 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1905 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1906 adpcm_g722_decoder_select="g722dsp"
1907 adpcm_g722_encoder_select="g722dsp"
1908 aic_decoder_select="golomb idctdsp"
1909 alac_encoder_select="lpc"
1910 als_decoder_select="bswapdsp"
1911 amrnb_decoder_select="lsp"
1912 amrwb_decoder_select="lsp"
1913 amv_decoder_select="sp5x_decoder"
1914 ape_decoder_select="bswapdsp"
1915 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1916 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1917 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1918 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1919 atrac1_decoder_select="mdct sinewin"
1920 atrac3_decoder_select="mdct"
1921 atrac3p_decoder_select="mdct sinewin"
1922 bink_decoder_select="blockdsp hpeldsp"
1923 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1924 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1925 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1926 cllc_decoder_select="bswapdsp"
1927 comfortnoise_encoder_select="lpc"
1928 cook_decoder_select="audiodsp mdct sinewin"
1929 cscd_decoder_select="lzo"
1930 cscd_decoder_suggest="zlib"
1931 dca_decoder_select="fmtconvert mdct"
1932 dds_decoder_select="texturedsp"
1933 dnxhd_decoder_select="blockdsp idctdsp"
1934 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1935 dvvideo_decoder_select="dvprofile idctdsp"
1936 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1937 dxa_decoder_deps="zlib"
1938 dxv_decoder_select="lzf texturedsp"
1939 eac3_decoder_select="ac3_decoder"
1940 eac3_encoder_select="ac3_encoder"
1941 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1942 eatgq_decoder_select="aandcttables idctdsp"
1943 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1944 exr_decoder_deps="zlib"
1945 ffv1_decoder_select="golomb rangecoder"
1946 ffv1_encoder_select="rangecoder"
1947 ffvhuff_decoder_select="huffyuv_decoder"
1948 ffvhuff_encoder_select="huffyuv_encoder"
1949 fic_decoder_select="golomb"
1950 flac_decoder_select="flacdsp golomb"
1951 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1952 flashsv_decoder_deps="zlib"
1953 flashsv_encoder_deps="zlib"
1954 flashsv2_decoder_deps="zlib"
1955 flv_decoder_select="h263_decoder"
1956 flv_encoder_select="h263_encoder"
1957 fourxm_decoder_select="blockdsp bswapdsp"
1958 fraps_decoder_select="bswapdsp huffman"
1959 g2m_decoder_deps="zlib"
1960 g2m_decoder_select="blockdsp idctdsp jpegtables"
1961 h261_decoder_select="mpeg_er mpegvideo"
1962 h261_encoder_select="aandcttables mpegvideoenc"
1963 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1964 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1965 h263i_decoder_select="h263_decoder"
1966 h263p_encoder_select="h263_encoder"
1967 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
1968 h264_decoder_suggest="error_resilience"
1969 hap_decoder_select="snappy texturedsp"
1970 hap_encoder_deps="libsnappy"
1971 hap_encoder_select="texturedspenc"
1972 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1973 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1974 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1975 iac_decoder_select="imc_decoder"
1976 imc_decoder_select="bswapdsp fft mdct sinewin"
1977 indeo3_decoder_select="hpeldsp"
1978 indeo4_decoder_select="ividsp"
1979 indeo5_decoder_select="ividsp"
1980 interplay_video_decoder_select="hpeldsp"
1981 jpegls_decoder_select="golomb mjpeg_decoder"
1982 jpegls_encoder_select="golomb"
1983 jv_decoder_select="blockdsp"
1984 lagarith_decoder_select="huffyuvdsp"
1985 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1986 loco_decoder_select="golomb"
1987 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1988 metasound_decoder_select="lsp mdct sinewin"
1989 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1990 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1991 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1992 mjpegb_decoder_select="mjpeg_decoder"
1993 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
1994 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
1995 mlp_decoder_select="mlp_parser"
1996 motionpixels_decoder_select="bswapdsp"
1997 mp1_decoder_select="mpegaudio"
1998 mp1float_decoder_select="mpegaudio"
1999 mp2_decoder_select="mpegaudio"
2000 mp2float_decoder_select="mpegaudio"
2001 mp3_decoder_select="mpegaudio"
2002 mp3adu_decoder_select="mpegaudio"
2003 mp3adufloat_decoder_select="mpegaudio"
2004 mp3float_decoder_select="mpegaudio"
2005 mp3on4_decoder_select="mpegaudio"
2006 mp3on4float_decoder_select="mpegaudio"
2007 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2008 mpc8_decoder_select="mpegaudiodsp"
2009 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2010 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2011 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2012 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2013 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2014 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2015 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2016 mpeg4_encoder_select="h263_encoder"
2017 msa1_decoder_select="mss34dsp"
2018 msmpeg4v1_decoder_select="h263_decoder"
2019 msmpeg4v2_decoder_select="h263_decoder"
2020 msmpeg4v2_encoder_select="h263_encoder"
2021 msmpeg4v3_decoder_select="h263_decoder"
2022 msmpeg4v3_encoder_select="h263_encoder"
2023 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2024 mts2_decoder_select="mss34dsp"
2025 mxpeg_decoder_select="mjpeg_decoder"
2026 nellymoser_decoder_select="mdct sinewin"
2027 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2028 nuv_decoder_select="idctdsp lzo"
2029 on2avc_decoder_select="mdct"
2030 opus_decoder_deps="avresample"
2031 opus_decoder_select="imdct15"
2032 png_decoder_deps="zlib"
2033 png_encoder_deps="zlib"
2034 png_encoder_select="huffyuvencdsp"
2035 prores_decoder_select="idctdsp"
2036 prores_encoder_select="fdctdsp"
2037 qcelp_decoder_select="lsp"
2038 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2039 ra_144_encoder_select="audio_frame_queue lpc"
2040 ralf_decoder_select="golomb"
2041 rscc_decoder_deps="zlib"
2042 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2043 rv10_encoder_select="h263_encoder"
2044 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2045 rv20_encoder_select="h263_encoder"
2046 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2047 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2048 screenpresso_decoder_deps="zlib"
2049 shorten_decoder_select="golomb"
2050 sipr_decoder_select="lsp"
2051 sp5x_decoder_select="mjpeg_decoder"
2052 svq1_decoder_select="hpeldsp"
2053 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2054 svq3_decoder_select="golomb h264dsp h264pred hpeldsp tpeldsp videodsp"
2055 svq3_decoder_suggest="zlib"
2056 tak_decoder_select="audiodsp"
2057 tdsc_decoder_deps="zlib"
2058 tdsc_decoder_select="mjpeg_decoder"
2059 theora_decoder_select="vp3_decoder"
2060 thp_decoder_select="mjpeg_decoder"
2061 tiff_decoder_suggest="zlib"
2062 tiff_encoder_suggest="zlib"
2063 truehd_decoder_select="mlp_decoder"
2064 truemotion2_decoder_select="bswapdsp"
2065 truespeech_decoder_select="bswapdsp"
2066 tscc_decoder_deps="zlib"
2067 txd_decoder_select="texturedsp"
2068 twinvq_decoder_select="mdct lsp sinewin"
2069 utvideo_decoder_select="bswapdsp"
2070 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2071 vble_decoder_select="huffyuvdsp"
2072 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2073 vc1image_decoder_select="vc1_decoder"
2074 vorbis_decoder_select="mdct"
2075 vorbis_encoder_select="mdct"
2076 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2077 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2078 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2079 vp6a_decoder_select="vp6_decoder"
2080 vp6f_decoder_select="vp6_decoder"
2081 vp7_decoder_select="h264pred videodsp vp8dsp"
2082 vp8_decoder_select="h264pred videodsp vp8dsp"
2083 vp9_decoder_select="videodsp"
2084 webp_decoder_select="vp8_decoder"
2085 wmapro_decoder_select="mdct sinewin wma_freqs"
2086 wmav1_decoder_select="mdct sinewin wma_freqs"
2087 wmav1_encoder_select="mdct sinewin wma_freqs"
2088 wmav2_decoder_select="mdct sinewin wma_freqs"
2089 wmav2_encoder_select="mdct sinewin wma_freqs"
2090 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2091 wmv1_decoder_select="h263_decoder"
2092 wmv1_encoder_select="h263_encoder"
2093 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2094 wmv2_encoder_select="h263_encoder wmv2dsp"
2095 wmv3_decoder_select="vc1_decoder"
2096 wmv3image_decoder_select="wmv3_decoder"
2097 zerocodec_decoder_deps="zlib"
2098 zlib_decoder_deps="zlib"
2099 zlib_encoder_deps="zlib"
2100 zmbv_decoder_deps="zlib"
2101 zmbv_encoder_deps="zlib"
2102
2103 # hardware accelerators
2104 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2105 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2106 vaapi_deps="va_va_h"
2107 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2108 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2109 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2110
2111 h263_vaapi_hwaccel_deps="vaapi"
2112 h263_vaapi_hwaccel_select="h263_decoder"
2113 h264_d3d11va_hwaccel_deps="d3d11va"
2114 h264_d3d11va_hwaccel_select="h264_decoder"
2115 h264_dxva2_hwaccel_deps="dxva2"
2116 h264_dxva2_hwaccel_select="h264_decoder"
2117 h264_mmal_decoder_deps="mmal"
2118 h264_mmal_decoder_select="mmal"
2119 h264_mmal_hwaccel_deps="mmal"
2120 h264_omx_encoder_deps="omx"
2121 h264_qsv_hwaccel_deps="libmfx"
2122 h264_vaapi_hwaccel_deps="vaapi"
2123 h264_vaapi_hwaccel_select="h264_decoder"
2124 h264_vda_hwaccel_deps="vda"
2125 h264_vda_hwaccel_select="h264_decoder"
2126 h264_vda_old_hwaccel_deps="vda"
2127 h264_vda_old_hwaccel_select="h264_decoder"
2128 h264_vdpau_hwaccel_deps="vdpau"
2129 h264_vdpau_hwaccel_select="h264_decoder"
2130 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2131 hevc_d3d11va_hwaccel_select="hevc_decoder"
2132 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2133 hevc_dxva2_hwaccel_select="hevc_decoder"
2134 hevc_qsv_hwaccel_deps="libmfx"
2135 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2136 hevc_vdpau_hwaccel_select="hevc_decoder"
2137 mpeg1_vdpau_hwaccel_deps="vdpau"
2138 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2139 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2140 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2141 mpeg2_dxva2_hwaccel_deps="dxva2"
2142 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2143 mpeg2_mmal_decoder_deps="mmal"
2144 mpeg2_mmal_decoder_select="mmal"
2145 mpeg2_mmal_hwaccel_deps="mmal"
2146 mpeg2_qsv_hwaccel_deps="libmfx"
2147 mpeg2_vaapi_hwaccel_deps="vaapi"
2148 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2149 mpeg2_vdpau_hwaccel_deps="vdpau"
2150 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2151 mpeg4_omx_encoder_deps="omx"
2152 mpeg4_vaapi_hwaccel_deps="vaapi"
2153 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2154 mpeg4_vdpau_hwaccel_deps="vdpau"
2155 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2156 vc1_d3d11va_hwaccel_deps="d3d11va"
2157 vc1_d3d11va_hwaccel_select="vc1_decoder"
2158 vc1_dxva2_hwaccel_deps="dxva2"
2159 vc1_dxva2_hwaccel_select="vc1_decoder"
2160 vc1_mmal_decoder_deps="mmal"
2161 vc1_mmal_decoder_select="mmal"
2162 vc1_mmal_hwaccel_deps="mmal"
2163 vc1_vaapi_hwaccel_deps="vaapi"
2164 vc1_vaapi_hwaccel_select="vc1_decoder"
2165 vc1_vdpau_hwaccel_deps="vdpau"
2166 vc1_vdpau_hwaccel_select="vc1_decoder"
2167 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2168 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2169 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2170 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2171
2172 # hardware-accelerated codecs
2173 nvenc_deps_any="dlopen LoadLibrary"
2174 nvenc_extralibs='$ldl'
2175 omx_deps="dlopen pthreads"
2176 omx_extralibs='$ldl'
2177 qsvdec_select="qsv"
2178 qsvenc_select="qsv"
2179 vaapi_encode_deps="vaapi"
2180
2181 hwupload_cuda_filter_deps="cuda"
2182 scale_npp_filter_deps="cuda libnpp"
2183
2184 h264_nvenc_encoder_deps="nvenc"
2185 h264_qsv_decoder_deps="libmfx"
2186 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2187 h264_qsv_encoder_deps="libmfx"
2188 h264_qsv_encoder_select="qsvenc"
2189 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2190 h264_vaapi_encoder_select="vaapi_encode golomb"
2191
2192 hevc_nvenc_encoder_deps="nvenc"
2193 hevc_qsv_decoder_deps="libmfx"
2194 hevc_qsv_encoder_deps="libmfx"
2195 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2196 hevc_qsv_encoder_select="qsvenc"
2197 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2198 hevc_vaapi_encoder_select="vaapi_encode golomb"
2199 mpeg2_qsv_decoder_deps="libmfx"
2200 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2201 mpeg2_qsv_encoder_deps="libmfx"
2202 mpeg2_qsv_encoder_select="qsvenc"
2203
2204 nvenc_h264_encoder_deps="nvenc"
2205 nvenc_hevc_encoder_deps="nvenc"
2206
2207 # parsers
2208 h264_parser_select="golomb h264dsp"
2209 hevc_parser_select="golomb"
2210 mpegvideo_parser_select="mpegvideo"
2211 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2212 vc1_parser_select="vc1dsp"
2213
2214 # bitstream_filters
2215 mjpeg2jpeg_bsf_select="jpegtables"
2216
2217 # external libraries
2218 libdcadec_decoder_deps="libdcadec"
2219 libfaac_encoder_deps="libfaac"
2220 libfaac_encoder_select="audio_frame_queue"
2221 libfdk_aac_decoder_deps="libfdk_aac"
2222 libfdk_aac_encoder_deps="libfdk_aac"
2223 libfdk_aac_encoder_select="audio_frame_queue"
2224 libgsm_decoder_deps="libgsm"
2225 libgsm_encoder_deps="libgsm"
2226 libgsm_ms_decoder_deps="libgsm"
2227 libgsm_ms_encoder_deps="libgsm"
2228 libilbc_decoder_deps="libilbc"
2229 libilbc_encoder_deps="libilbc"
2230 libkvazaar_encoder_deps="libkvazaar"
2231 libmp3lame_encoder_deps="libmp3lame"
2232 libmp3lame_encoder_select="audio_frame_queue"
2233 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2234 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2235 libopencore_amrnb_encoder_select="audio_frame_queue"
2236 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2237 libopenh264_encoder_deps="libopenh264"
2238 libopenjpeg_decoder_deps="libopenjpeg"
2239 libopenjpeg_encoder_deps="libopenjpeg"
2240 libopus_decoder_deps="libopus"
2241 libopus_encoder_deps="libopus"
2242 libopus_encoder_select="audio_frame_queue"
2243 libschroedinger_decoder_deps="libschroedinger"
2244 libschroedinger_encoder_deps="libschroedinger"
2245 libspeex_decoder_deps="libspeex"
2246 libspeex_encoder_deps="libspeex"
2247 libspeex_encoder_select="audio_frame_queue"
2248 libtheora_encoder_deps="libtheora"
2249 libtwolame_encoder_deps="libtwolame"
2250 libvo_aacenc_encoder_deps="libvo_aacenc"
2251 libvo_aacenc_encoder_select="audio_frame_queue"
2252 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2253 libvorbis_encoder_deps="libvorbis"
2254 libvorbis_encoder_select="audio_frame_queue"
2255 libvpx_vp8_decoder_deps="libvpx"
2256 libvpx_vp8_encoder_deps="libvpx"
2257 libvpx_vp9_decoder_deps="libvpx"
2258 libvpx_vp9_encoder_deps="libvpx"
2259 libwavpack_encoder_deps="libwavpack"
2260 libwebp_encoder_deps="libwebp"
2261 libx262_encoder_deps="libx262"
2262 libx264_encoder_deps="libx264"
2263 libx265_encoder_deps="libx265"
2264 libxavs_encoder_deps="libxavs"
2265 libxvid_encoder_deps="libxvid"
2266
2267 # demuxers / muxers
2268 ac3_demuxer_select="ac3_parser"
2269 asf_demuxer_select="riffdec"
2270 asf_muxer_select="riffenc"
2271 asf_stream_muxer_select="asf_muxer"
2272 avi_demuxer_select="iso_media riffdec"
2273 avi_muxer_select="riffenc"
2274 avisynth_demuxer_deps="avisynth"
2275 avisynth_demuxer_select="riffdec"
2276 caf_demuxer_select="iso_media riffdec"
2277 dash_muxer_select="mp4_muxer"
2278 dirac_demuxer_select="dirac_parser"
2279 dv_demuxer_select="dvprofile"
2280 dv_muxer_select="dvprofile"
2281 dxa_demuxer_select="riffdec"
2282 eac3_demuxer_select="ac3_parser"
2283 f4v_muxer_select="mov_muxer"
2284 flac_demuxer_select="flac_parser"
2285 hds_muxer_select="flv_muxer"
2286 hls_muxer_select="mpegts_muxer"
2287 ipod_muxer_select="mov_muxer"
2288 ismv_muxer_select="mov_muxer"
2289 matroska_audio_muxer_select="matroska_muxer"
2290 matroska_demuxer_select="iso_media riffdec"
2291 matroska_demuxer_suggest="bzlib lzo zlib"
2292 matroska_muxer_select="iso_media riffenc"
2293 mmf_muxer_select="riffenc"
2294 mov_demuxer_select="iso_media riffdec"
2295 mov_demuxer_suggest="zlib"
2296 mov_muxer_select="iso_media riffenc rtpenc_chain"
2297 mp3_demuxer_select="mpegaudio_parser"
2298 mp4_muxer_select="mov_muxer"
2299 mpegts_demuxer_select="iso_media"
2300 mpegts_muxer_select="adts_muxer latm_muxer"
2301 mpegtsraw_demuxer_select="mpegts_demuxer"
2302 mxf_d10_muxer_select="mxf_muxer"
2303 nut_muxer_select="riffenc"
2304 nuv_demuxer_select="riffdec"
2305 oga_muxer_select="ogg_muxer"
2306 ogg_demuxer_select="dirac_parse"
2307 opus_muxer_select="ogg_muxer"
2308 psp_muxer_select="mov_muxer"
2309 rtp_demuxer_select="sdp_demuxer"
2310 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2311 rtsp_demuxer_select="http_protocol rtpdec"
2312 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2313 sap_demuxer_select="sdp_demuxer"
2314 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2315 sdp_demuxer_select="rtpdec"
2316 smoothstreaming_muxer_select="ismv_muxer"
2317 spdif_muxer_select="aac_parser"
2318 spx_muxer_select="ogg_muxer"
2319 swf_demuxer_suggest="zlib"
2320 tak_demuxer_select="tak_parser"
2321 tg2_muxer_select="mov_muxer"
2322 tgp_muxer_select="mov_muxer"
2323 w64_demuxer_select="wav_demuxer"
2324 wav_demuxer_select="riffdec"
2325 wav_muxer_select="riffenc"
2326 webm_muxer_select="iso_media riffenc"
2327 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2328 wtv_demuxer_select="mpegts_demuxer riffdec"
2329 xmv_demuxer_select="riffdec"
2330 xwma_demuxer_select="riffdec"
2331
2332 # indevs / outdevs
2333 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2334 alsa_outdev_deps="alsa_asoundlib_h"
2335 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2336 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2337 dv1394_indev_deps="dv1394"
2338 dv1394_indev_select="dv_demuxer"
2339 fbdev_indev_deps="linux_fb_h"
2340 jack_indev_deps="jack_jack_h"
2341 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2342 libcdio_indev_deps="libcdio"
2343 libdc1394_indev_deps="libdc1394"
2344 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2345 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2346 pulse_indev_deps="libpulse"
2347 sndio_indev_deps="sndio_h"
2348 sndio_outdev_deps="sndio_h"
2349 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2350 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2351 vfwcap_indev_extralibs="-lavicap32"
2352 x11grab_indev_deps="x11grab"
2353 x11grab_xcb_indev_deps="libxcb"
2354
2355 # protocols
2356 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2357 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2358 ffrtmpcrypt_protocol_select="tcp_protocol"
2359 ffrtmphttp_protocol_deps="!librtmp_protocol"
2360 ffrtmphttp_protocol_select="http_protocol"
2361 gopher_protocol_select="network"
2362 http_protocol_select="tcp_protocol"
2363 httpproxy_protocol_select="tcp_protocol"
2364 https_protocol_select="tls_protocol"
2365 icecast_protocol_select="http_protocol"
2366 librtmp_protocol_deps="librtmp"
2367 librtmpe_protocol_deps="librtmp"
2368 librtmps_protocol_deps="librtmp"
2369 librtmpt_protocol_deps="librtmp"
2370 librtmpte_protocol_deps="librtmp"
2371 mmsh_protocol_select="http_protocol"
2372 mmst_protocol_select="network"
2373 rtmp_protocol_deps="!librtmp_protocol"
2374 rtmp_protocol_select="tcp_protocol"
2375 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2376 rtmps_protocol_deps="!librtmp_protocol"
2377 rtmps_protocol_select="tls_protocol"
2378 rtmpt_protocol_select="ffrtmphttp_protocol"
2379 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2380 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2381 rtp_protocol_select="udp_protocol"
2382 sctp_protocol_deps="struct_sctp_event_subscribe"
2383 sctp_protocol_select="network"
2384 srtp_protocol_select="rtp_protocol srtp"
2385 tcp_protocol_select="network"
2386 tls_gnutls_protocol_deps="gnutls"
2387 tls_gnutls_protocol_select="tcp_protocol"
2388 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2389 tls_openssl_protocol_select="tcp_protocol"
2390 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2391 udp_protocol_select="network"
2392 unix_protocol_deps="sys_un_h"
2393 unix_protocol_select="network"
2394
2395 # filters
2396 blackframe_filter_deps="gpl"
2397 boxblur_filter_deps="gpl"
2398 bs2b_filter_deps="libbs2b"
2399 cropdetect_filter_deps="gpl"
2400 delogo_filter_deps="gpl"
2401 drawtext_filter_deps="libfreetype"
2402 frei0r_filter_deps="frei0r dlopen"
2403 frei0r_filter_extralibs='$ldl'
2404 frei0r_src_filter_deps="frei0r dlopen"
2405 frei0r_src_filter_extralibs='$ldl'
2406 hqdn3d_filter_deps="gpl"
2407 interlace_filter_deps="gpl"
2408 ocv_filter_deps="libopencv"
2409 resample_filter_deps="avresample"
2410 scale_filter_deps="swscale"
2411 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2412
2413 # examples
2414 avcodec_example_deps="avcodec avutil"
2415 filter_audio_example_deps="avfilter avutil"
2416 metadata_example_deps="avformat avutil"
2417 output_example_deps="avcodec avformat avutil swscale"
2418 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2419 transcode_aac_example_deps="avcodec avformat avresample"
2420
2421 # libraries, in linking order
2422 avcodec_deps="avutil"
2423 avdevice_deps="avformat avcodec avutil"
2424 avfilter_deps="avutil"
2425 avformat_deps="avcodec avutil"
2426 avresample_deps="avutil"
2427 swscale_deps="avutil"
2428
2429 # programs
2430 avconv_deps="avcodec avfilter avformat avresample swscale"
2431 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2432                fps_filter null_filter resample_filter scale_filter
2433                setpts_filter trim_filter"
2434 avplay_deps="avcodec avfilter avformat avresample sdl"
2435 avplay_libs='$sdl_libs'
2436 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2437 avprobe_deps="avcodec avformat"
2438
2439 # documentation
2440 pod2man_deps="doc"
2441 texi2html_deps="doc"
2442
2443 # default parameters
2444
2445 logfile="config.log"
2446
2447 # installation paths
2448 prefix_default="/usr/local"
2449 bindir_default='${prefix}/bin'
2450 datadir_default='${prefix}/share/avconv'
2451 docdir_default='${prefix}/share/doc/libav'
2452 incdir_default='${prefix}/include'
2453 libdir_default='${prefix}/lib'
2454 mandir_default='${prefix}/share/man'
2455 shlibdir_default="$libdir_default"
2456
2457 # toolchain
2458 ar_default="ar"
2459 cc_default="gcc"
2460 host_cc_default="gcc"
2461 cp_f="cp -f"
2462 ln_s="ln -s -f"
2463 nm_default="nm -g"
2464 objformat="elf"
2465 pkg_config_default=pkg-config
2466 ranlib="ranlib"
2467 strip="strip"
2468 yasmexe="yasm"
2469
2470 # machine
2471 arch_default=$(uname -m)
2472 cpu="generic"
2473 intrinsics="none"
2474
2475 # OS
2476 target_os_default=$(tolower $(uname -s))
2477 host_os=$target_os_default
2478
2479 # configurable options
2480 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2481
2482 enable asm
2483 enable debug
2484 enable doc
2485 enable faan faandct faanidct
2486 enable optimizations
2487 enable safe_bitstream_reader
2488 enable static
2489 enable swscale_alpha
2490 enable valgrind_backtrace
2491
2492 # By default, enable only those hwaccels that have no external dependencies.
2493 enable d3d11va dxva2 vda vdpau
2494
2495 # build settings
2496 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2497 LIBPREF="lib"
2498 LIBSUF=".a"
2499 FULLNAME='$(NAME)$(BUILDSUF)'
2500 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2501 SLIBPREF="lib"
2502 SLIBSUF=".so"
2503 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2504 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2505 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2506 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2507 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2508 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2509
2510 asflags_filter=echo
2511 cflags_filter=echo
2512 ldflags_filter=echo
2513
2514 AS_C='-c'
2515 AS_O='-o $@'
2516 CC_C='-c'
2517 CC_E='-E -o $@'
2518 CC_O='-o $@'
2519 OBJCC_C='-c'
2520 OBJCC_E='-E -o $@'
2521 OBJCC_O='-o $@'
2522 LD_O='-o $@'
2523 LD_LIB='-l%'
2524 LD_PATH='-L'
2525 HOSTCC_C='-c'
2526 HOSTCC_E='-E -o $@'
2527 HOSTCC_O='-o $@'
2528 HOSTLD_O='-o $@'
2529
2530 host_libs='-lm'
2531 host_cflags_filter=echo
2532 host_ldflags_filter=echo
2533
2534 target_path='$(CURDIR)'
2535
2536 # since the object filename is not given with the -MM flag, the compiler
2537 # is only able to print the basename, and we must add the path ourselves
2538 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2539 DEPFLAGS='-MM'
2540
2541 # find source path
2542 if test -f configure; then
2543     source_path=.
2544 else
2545     source_path=$(cd $(dirname "$0"); pwd)
2546     echo "$source_path" | grep -q '[[:blank:]]' &&
2547         die "Out of tree builds are impossible with whitespace in source path."
2548     test -e "$source_path/config.h" &&
2549         die "Out of tree builds are impossible with config.h in source dir."
2550 fi
2551
2552 for v in "$@"; do
2553     r=${v#*=}
2554     l=${v%"$r"}
2555     r=$(sh_quote "$r")
2556     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2557 done
2558
2559 find_things(){
2560     thing=$1
2561     pattern=$2
2562     file=$source_path/$3
2563     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2564 }
2565
2566 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2567 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2568 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2569 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2570 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2571 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2572 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2573 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2574 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2575
2576 find_things_extern(){
2577     thing=$1
2578     pattern=$2
2579     file=$source_path/$3
2580     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2581 }
2582
2583 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2584 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2585
2586 ALL_COMPONENTS="
2587     $BSF_LIST
2588     $DECODER_LIST
2589     $DEMUXER_LIST
2590     $ENCODER_LIST
2591     $FILTER_LIST
2592     $HWACCEL_LIST
2593     $INDEV_LIST
2594     $MUXER_LIST
2595     $OUTDEV_LIST
2596     $PARSER_LIST
2597     $PROTOCOL_LIST
2598 "
2599
2600 for n in $COMPONENT_LIST; do
2601     v=$(toupper ${n%s})_LIST
2602     eval enable \$$v
2603     eval ${n}_if_any="\$$v"
2604 done
2605
2606 enable $ARCH_EXT_LIST
2607
2608 die_unknown(){
2609     echo "Unknown option \"$1\"."
2610     echo "See $0 --help for available options."
2611     exit 1
2612 }
2613
2614 print_3_columns() {
2615     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2616 }
2617
2618 show_list() {
2619     suffix=_$1
2620     shift
2621     echo $* | sed s/$suffix//g | print_3_columns
2622     exit 0
2623 }
2624
2625 rand_list(){
2626     IFS=', '
2627     set -- $*
2628     unset IFS
2629     for thing; do
2630         comp=${thing%:*}
2631         prob=${thing#$comp}
2632         prob=${prob#:}
2633         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2634         echo "prob ${prob:-0.5}"
2635         printf '%s\n' $comp
2636     done
2637 }
2638
2639 do_random(){
2640     action=$1
2641     shift
2642     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2643     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2644 }
2645
2646 for opt do
2647     optval="${opt#*=}"
2648     case "$opt" in
2649         --extra-ldflags=*)
2650             add_ldflags $optval
2651         ;;
2652         --extra-ldexeflags=*)
2653             add_ldexeflags $optval
2654         ;;
2655         --extra-libs=*)
2656             add_extralibs $optval
2657         ;;
2658         --disable-devices)
2659             disable $INDEV_LIST $OUTDEV_LIST
2660         ;;
2661         --enable-debug=*)
2662             debuglevel="$optval"
2663         ;;
2664         --disable-programs)
2665             disable $PROGRAM_LIST
2666         ;;
2667         --disable-everything)
2668             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2669         ;;
2670         --disable-all)
2671             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2672             disable $LIBRARY_LIST $PROGRAM_LIST doc
2673         ;;
2674         --enable-random|--disable-random)
2675             action=${opt%%-random}
2676             do_random ${action#--} $COMPONENT_LIST
2677         ;;
2678         --enable-random=*|--disable-random=*)
2679             action=${opt%%-random=*}
2680             do_random ${action#--} $optval
2681         ;;
2682         --enable-*=*|--disable-*=*)
2683             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2684             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2685             eval list=\$$(toupper $thing)_LIST
2686             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2687             $action $(filter "$name" $list)
2688         ;;
2689         --enable-avserver|--disable-avserver*)
2690             warn "avserver has been removed, the ${opt} option is only"\
2691                  "provided for compatibility and will be removed in the future"
2692         ;;
2693         --enable-?*|--disable-?*)
2694             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2695             if is_in $option $COMPONENT_LIST; then
2696                 test $action = disable && action=unset
2697                 eval $action \$$(toupper ${option%s})_LIST
2698             elif is_in $option $CMDLINE_SELECT; then
2699                 $action $option
2700             else
2701                 die_unknown $opt
2702             fi
2703         ;;
2704         --list-*)
2705             NAME="${opt#--list-}"
2706             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2707             NAME=${NAME%s}
2708             eval show_list $NAME \$$(toupper $NAME)_LIST
2709         ;;
2710         --help|-h) show_help
2711         ;;
2712         *)
2713             optname="${opt%%=*}"
2714             optname="${optname#--}"
2715             optname=$(echo "$optname" | sed 's/-/_/g')
2716             if is_in $optname $CMDLINE_SET; then
2717                 eval $optname='$optval'
2718             elif is_in $optname $CMDLINE_APPEND; then
2719                 append $optname "$optval"
2720             else
2721                 die_unknown $opt
2722             fi
2723         ;;
2724     esac
2725 done
2726
2727 for e in $env; do
2728     eval "export $e"
2729 done
2730
2731 disabled logging && logfile=/dev/null
2732
2733 # Disable all the library-specific components if the library itself
2734 # is disabled, see AVCODEC_LIST and following _LIST variables.
2735
2736 disable_components(){
2737     disabled ${1} && disable $(
2738         eval components="\$$(toupper ${1})_COMPONENTS"
2739         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2740     )
2741 }
2742
2743 map 'disable_components $v' $LIBRARY_LIST
2744
2745 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2746 set >> $logfile
2747
2748 case "$toolchain" in
2749     *-asan)
2750         cc_default="${toolchain%-asan}"
2751         add_cflags  -fsanitize=address
2752         add_ldflags -fsanitize=address
2753     ;;
2754     *-msan)
2755         cc_default="${toolchain%-msan}"
2756         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2757         add_ldflags -fsanitize=memory
2758     ;;
2759     *-tsan)
2760         cc_default="${toolchain%-tsan}"
2761         add_cflags  -fsanitize=thread -pie
2762         add_ldflags -fsanitize=thread -pie
2763         case "$toolchain" in
2764             gcc-tsan)
2765                 add_cflags  -fPIC
2766                 add_ldflags -fPIC
2767                 ;;
2768         esac
2769     ;;
2770     *-usan)
2771         cc_default="${toolchain%-usan}"
2772         add_cflags  -fsanitize=undefined
2773         add_ldflags -fsanitize=undefined
2774         case "$toolchain" in
2775             clang-usan)
2776                 add_cflags -O1
2777                 ;;
2778         esac
2779     ;;
2780     valgrind-*)
2781         target_exec_default="valgrind"
2782         case "$toolchain" in
2783             valgrind-massif)
2784                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2785                 ;;
2786             valgrind-memcheck)
2787                 target_exec_args="--track-origins=yes --leak-check=full"
2788                 ;;
2789         esac
2790     ;;
2791     msvc)
2792         # Check whether the current MSVC version needs the C99 converter.
2793         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2794         # support enough of C99 to build libav. Default to the new
2795         # behaviour if the regexp was unable to match anything, since this
2796         # successfully parses the version number of existing supported
2797         # versions that require the converter (MSVC 2010 and 2012).
2798         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2799         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2800             cc_default="cl"
2801         else
2802             cc_default="c99wrap cl"
2803         fi
2804         ld_default="$source_path/compat/windows/mslink"
2805         nm_default="dumpbin -symbols"
2806         ar_default="lib"
2807         case "$arch" in
2808         arm*)
2809             as_default="armasm"
2810             ;;
2811         esac
2812         target_os_default="win32"
2813         # Use a relative path for TMPDIR. This makes sure all the
2814         # ffconf temp files are written with a relative path, avoiding
2815         # issues with msys/win32 path conversion for MSVC parameters
2816         # such as -Fo<file> or -out:<file>.
2817         TMPDIR=.
2818     ;;
2819     icl)
2820         cc_default="icl"
2821         ld_default="xilink"
2822         nm_default="dumpbin -symbols"
2823         ar_default="xilib"
2824         target_os_default="win32"
2825         TMPDIR=.
2826     ;;
2827     gcov)
2828         add_cflags  -fprofile-arcs -ftest-coverage
2829         add_ldflags -fprofile-arcs -ftest-coverage
2830     ;;
2831     llvm-cov)
2832         add_cflags -fprofile-arcs -ftest-coverage
2833         add_ldflags --coverage
2834     ;;
2835     hardened)
2836         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2837         add_cflags   -fno-strict-overflow -fstack-protector-all
2838         add_ldflags  -Wl,-z,relro -Wl,-z,now
2839     ;;
2840     ?*)
2841         die "Unknown toolchain $toolchain"
2842     ;;
2843 esac
2844
2845 test -n "$cross_prefix" && enable cross_compile
2846
2847 if enabled cross_compile; then
2848     test -n "$arch" && test -n "$target_os" ||
2849         die "Must specify target arch and OS when cross-compiling"
2850 fi
2851
2852 ar_default="${cross_prefix}${ar_default}"
2853 cc_default="${cross_prefix}${cc_default}"
2854 occ_default="${cross_prefix}${occ_default}"
2855 nm_default="${cross_prefix}${nm_default}"
2856 pkg_config_default="${cross_prefix}${pkg_config_default}"
2857 ranlib="${cross_prefix}${ranlib}"
2858 strip="${cross_prefix}${strip}"
2859
2860 sysinclude_default="${sysroot}/usr/include"
2861
2862 set_default arch cc pkg_config sysinclude target_exec target_os
2863 enabled cross_compile || host_cc_default=$cc
2864 set_default host_cc
2865
2866 if ! $pkg_config --version >/dev/null 2>&1; then
2867     warn "$pkg_config not found, library detection may fail."
2868     pkg_config=false
2869 fi
2870
2871 exesuf() {
2872     case $1 in
2873         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2874     esac
2875 }
2876
2877 EXESUF=$(exesuf $target_os)
2878 HOSTEXESUF=$(exesuf $host_os)
2879
2880 # set temporary file name
2881 : ${TMPDIR:=$TEMPDIR}
2882 : ${TMPDIR:=$TMP}
2883 : ${TMPDIR:=/tmp}
2884
2885 if ! check_cmd mktemp -u XXXXXX; then
2886     # simple replacement for missing mktemp
2887     # NOT SAFE FOR GENERAL USE
2888     mktemp(){
2889         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2890     }
2891 fi
2892
2893 tmpfile(){
2894     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2895         (set -C; exec > $tmp) 2>/dev/null ||
2896         die "Unable to create temporary file in $TMPDIR."
2897     append TMPFILES $tmp
2898     eval $1=$tmp
2899 }
2900
2901 trap 'rm -f -- $TMPFILES' EXIT
2902
2903 tmpfile TMPASM .asm
2904 tmpfile TMPC   .c
2905 tmpfile TMPE   $EXESUF
2906 tmpfile TMPH   .h
2907 tmpfile TMPO   .o
2908 tmpfile TMPS   .S
2909 tmpfile TMPSH  .sh
2910 tmpfile TMPV   .ver
2911
2912 unset -f mktemp
2913
2914 chmod +x $TMPE
2915
2916 # make sure we can execute files in $TMPDIR
2917 cat > $TMPSH 2>> $logfile <<EOF
2918 #! /bin/sh
2919 EOF
2920 chmod +x $TMPSH >> $logfile 2>&1
2921 if ! $TMPSH >> $logfile 2>&1; then
2922     cat <<EOF
2923 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2924 variable to another directory and make sure that it is not mounted noexec.
2925 EOF
2926     die "Sanity test failed."
2927 fi
2928
2929 armasm_flags(){
2930     for flag; do
2931         case $flag in
2932             # Filter out MSVC cl.exe options from cflags that shouldn't
2933             # be passed to gas-preprocessor
2934             -M[TD]*)                                            ;;
2935             *)                  echo $flag                      ;;
2936         esac
2937    done
2938 }
2939
2940 ccc_flags(){
2941     for flag; do
2942         case $flag in
2943             -std=c99)           echo -c99                       ;;
2944             -mcpu=*)            echo -arch ${flag#*=}           ;;
2945             -mieee)             echo -ieee                      ;;
2946             -O*|-fast)          echo $flag                      ;;
2947             -fno-math-errno)    echo -assume nomath_errno       ;;
2948             -g)                 echo -g3                        ;;
2949             -Wall)              echo -msg_enable level2         ;;
2950             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2951             -Wl,*)              echo $flag                      ;;
2952             -f*|-W*)                                            ;;
2953             *)                  echo $flag                      ;;
2954         esac
2955    done
2956 }
2957
2958 cparser_flags(){
2959     for flag; do
2960         case $flag in
2961             -Wno-switch)             echo -Wno-switch-enum ;;
2962             -Wno-format-zero-length) ;;
2963             -Wdisabled-optimization) ;;
2964             -Wno-pointer-sign)       echo -Wno-other ;;
2965             *)                       echo $flag ;;
2966         esac
2967     done
2968 }
2969
2970 msvc_common_flags(){
2971     for flag; do
2972         case $flag in
2973             # In addition to specifying certain flags under the compiler
2974             # specific filters, they must be specified here as well or else the
2975             # generic catch all at the bottom will print the original flag.
2976             -Wall)                ;;
2977             -std=c99)             ;;
2978             # Common flags
2979             -fomit-frame-pointer) ;;
2980             -g)                   echo -Z7 ;;
2981             -fno-math-errno)      ;;
2982             -fno-common)          ;;
2983             -fno-signed-zeros)    ;;
2984             -fPIC)                ;;
2985             -mthumb)              ;;
2986             -march=*)             ;;
2987             -lz)                  echo zlib.lib ;;
2988             -lavifil32)           echo vfw32.lib ;;
2989             -lavicap32)           echo vfw32.lib user32.lib ;;
2990             -lx264)               echo libx264.lib ;;
2991             -l*)                  echo ${flag#-l}.lib ;;
2992             -L*)                  echo -libpath:${flag#-L} ;;
2993             *)                    echo $flag ;;
2994         esac
2995     done
2996 }
2997
2998 msvc_flags(){
2999     msvc_common_flags "$@"
3000     for flag; do
3001         case $flag in
3002             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3003                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3004                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3005                                        -wd4273 -wd4554 -wd4701 ;;
3006         esac
3007     done
3008 }
3009
3010 icl_flags(){
3011     msvc_common_flags "$@"
3012     for flag; do
3013         case $flag in
3014             # Despite what Intel's documentation says -Wall, which is supported
3015             # on Windows, does enable remarks so disable them here.
3016             -Wall)                echo $flag -Qdiag-disable:remark ;;
3017             -std=c99)             echo -Qstd=c99 ;;
3018         esac
3019     done
3020 }
3021
3022 pgi_flags(){
3023     for flag; do
3024         case $flag in
3025             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3026             -fomit-frame-pointer) echo -Mnoframe ;;
3027             -g)                   echo -gopt ;;
3028             *)                    echo $flag ;;
3029         esac
3030     done
3031 }
3032
3033 suncc_flags(){
3034     for flag; do
3035         case $flag in
3036             -march=*|-mcpu=*)
3037                 case "${flag#*=}" in
3038                     native)                   echo -xtarget=native       ;;
3039                     v9|niagara)               echo -xarch=sparc          ;;
3040                     ultrasparc)               echo -xarch=sparcvis       ;;
3041                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3042                     i586|pentium)             echo -xchip=pentium        ;;
3043                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3044                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3045                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3046                     pentium4*)          echo -xtarget=pentium4           ;;
3047                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3048                     *-sse3)             echo -xarch=sse3                 ;;
3049                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3050                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3051                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3052                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3053                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3054                     k8|opteron|athlon64|athlon-fx)
3055                                                echo -xarch=sse2a         ;;
3056                     athlon*)                   echo -xarch=pentium_proa  ;;
3057                 esac
3058                 ;;
3059             -std=c99)             echo -xc99              ;;
3060             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3061             -fPIC)                echo -KPIC -xcode=pic32 ;;
3062             -W*,*)                echo $flag              ;;
3063             -f*-*|-W*|-mimpure-text)                      ;;
3064             -shared)              echo -G                 ;;
3065             *)                    echo $flag              ;;
3066         esac
3067     done
3068 }
3069
3070 tms470_flags(){
3071     for flag; do
3072         case $flag in
3073             -march=*|-mcpu=*)
3074                 case "${flag#*=}" in
3075                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3076                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3077                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3078                     armv6*|arm11*)          echo -mv=6   ;;
3079                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3080                                             echo -mv=5e  ;;
3081                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3082                 esac
3083                 ;;
3084             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3085             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3086             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3087             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3088             -msoft-float)   echo --float_support=vfplib       ;;
3089             -O[0-3]|-mf=*)  echo $flag                        ;;
3090             -g)             echo -g -mn                       ;;
3091             -pds=*)         echo $flag                        ;;
3092             -D*|-I*)        echo $flag                        ;;
3093             --gcc|--abi=*)  echo $flag                        ;;
3094             -me)            echo $flag                        ;;
3095         esac
3096     done
3097 }
3098
3099 probe_cc(){
3100     pfx=$1
3101     _cc=$2
3102
3103     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3104     unset _ld_o _ldflags _ld_lib _ld_path
3105     unset _depflags _DEPCMD _DEPFLAGS
3106     _flags_filter=echo
3107
3108     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3109         _type=llvm_gcc
3110         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3111         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3112         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3113         _cflags_speed='-O3'
3114         _cflags_size='-Os'
3115     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3116         _type=gcc
3117         gcc_version=$($_cc --version | head -n1)
3118         gcc_basever=$($_cc -dumpversion)
3119         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3120         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3121         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3122         if ! $_cc -dumpversion | grep -q '^2\.'; then
3123             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3124         fi
3125         _cflags_speed='-O3'
3126         _cflags_size='-Os'
3127     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3128         _type=icc
3129         _ident=$($_cc --version | head -n1)
3130         _depflags='-MMD'
3131         _cflags_speed='-O3'
3132         _cflags_size='-Os'
3133         _cflags_noopt='-O1'
3134     elif $_cc -v 2>&1 | grep -q xlc; then
3135         _type=xlc
3136         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3137         _cflags_speed='-O5'
3138         _cflags_size='-O5 -qcompact'
3139     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3140         _type=ccc
3141         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3142         _DEPFLAGS='-M'
3143         _cflags_speed='-fast'
3144         _cflags_size='-O1'
3145         _flags_filter=ccc_flags
3146     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3147         test -d "$sysroot" || die "No valid sysroot specified."
3148         _type=armcc
3149         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3150         armcc_conf="$PWD/armcc.conf"
3151         $_cc --arm_linux_configure                 \
3152              --arm_linux_config_file="$armcc_conf" \
3153              --configure_sysroot="$sysroot"        \
3154              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3155              die "Error creating armcc configuration file."
3156         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3157         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3158         as_default="${cross_prefix}gcc"
3159         _depflags='-MMD'
3160         _cflags_speed='-O3'
3161         _cflags_size='-Os'
3162     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3163         _type=tms470
3164         _ident=$($_cc -version | head -n1 | tr -s ' ')
3165         _flags='--gcc --abi=eabi -me'
3166         _cc_e='-ppl -fe=$@'
3167         _cc_o='-fe=$@'
3168         _depflags='-ppa -ppd=$(@:.o=.d)'
3169         _cflags_speed='-O3 -mf=5'
3170         _cflags_size='-O3 -mf=2'
3171         _flags_filter=tms470_flags
3172     elif $_cc -v 2>&1 | grep -q clang; then
3173         _type=clang
3174         _ident=$($_cc --version 2>/dev/null | head -n1)
3175         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3176         _cflags_speed='-O3'
3177         _cflags_size='-Os'
3178     elif $_cc -V 2>&1 | grep -q Sun; then
3179         _type=suncc
3180         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3181         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3182         _DEPFLAGS='-xM1 -xc99'
3183         _ldflags='-std=c99'
3184         _cflags_speed='-O5'
3185         _cflags_size='-O5 -xspace'
3186         _flags_filter=suncc_flags
3187     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3188         _type=pathscale
3189         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3190         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3191         _cflags_speed='-O2'
3192         _cflags_size='-Os'
3193         _flags_filter='filter_out -Wdisabled-optimization'
3194     elif $_cc -v 2>&1 | grep -q Open64; then
3195         _type=open64
3196         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3197         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3198         _cflags_speed='-O2'
3199         _cflags_size='-Os'
3200         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3201     elif $_cc -V 2>&1 | grep -q Portland; then
3202         _type=pgi
3203         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3204         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3205         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3206         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3207         _cflags_noopt="-O1"
3208         _flags_filter=pgi_flags
3209     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3210         _type=armasm
3211         _ident=$($_cc | head -n1)
3212         # 4509: "This form of conditional instruction is deprecated"
3213         _flags="-nologo -ignore 4509"
3214         _flags_filter=armasm_flags
3215     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3216         _type=msvc
3217         _ident=$($_cc 2>&1 | head -n1)
3218         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3219         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3220         _cflags_speed="-O2"
3221         _cflags_size="-O1"
3222         if $_cc -nologo- 2>&1 | grep -q Linker; then
3223             _ld_o='-out:$@'
3224         else
3225             _ld_o='-Fe$@'
3226         fi
3227         _cc_o='-Fo$@'
3228         _cc_e='-P -Fi$@'
3229         _flags_filter=msvc_flags
3230         _ld_lib='lib%.a'
3231         _ld_path='-libpath:'
3232         _flags='-nologo'
3233         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3234     elif $_cc 2>&1 | grep -q Intel; then
3235         _type=icl
3236         _ident=$($_cc 2>&1 | head -n1)
3237         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3238         # Not only is O3 broken on 13.x+ but it is slower on all previous
3239         # versions (tested) as well.
3240         _cflags_speed="-O2"
3241         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3242         if $_cc 2>&1 | grep -q Linker; then
3243             _ld_o='-out:$@'
3244         else
3245             _ld_o='-Fe$@'
3246         fi
3247         _cc_o='-Fo$@'
3248         _cc_e='-P'
3249         _flags_filter=icl_flags
3250         _ld_lib='lib%.a'
3251         _ld_path='-libpath:'
3252         # -Qdiag-error to make icl error when seeing certain unknown arguments
3253         _flags='-nologo -Qdiag-error:4044,10157'
3254         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3255         # with MSVC which enables it by default.
3256         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3257     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3258         _type=cparser
3259         _ident=$($_cc --version | head -n1)
3260         _depflags='-MMD'
3261         _cflags_speed='-O4'
3262         _cflags_size='-O2'
3263         _flags_filter=cparser_flags
3264     fi
3265
3266     eval ${pfx}_type=\$_type
3267     eval ${pfx}_ident=\$_ident
3268 }
3269
3270 set_ccvars(){
3271     eval ${1}_C=\${_cc_c-\${${1}_C}}
3272     eval ${1}_E=\${_cc_e-\${${1}_E}}
3273     eval ${1}_O=\${_cc_o-\${${1}_O}}
3274
3275     if [ -n "$_depflags" ]; then
3276         eval ${1}_DEPFLAGS=\$_depflags
3277     else
3278         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3279         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3280         eval DEP${1}FLAGS=\$_flags
3281     fi
3282 }
3283
3284 probe_cc cc "$cc"
3285 cflags_filter=$_flags_filter
3286 cflags_speed=$_cflags_speed
3287 cflags_size=$_cflags_size
3288 cflags_noopt=$_cflags_noopt
3289 add_cflags $_flags $_cflags
3290 cc_ldflags=$_ldflags
3291 set_ccvars CC
3292
3293 probe_cc hostcc "$host_cc"
3294 host_cflags_filter=$_flags_filter
3295 add_host_cflags  $_flags $_cflags
3296 set_ccvars HOSTCC
3297
3298 test -n "$cc_type" && enable $cc_type ||
3299     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3300
3301 : ${as_default:=$cc}
3302 : ${objcc_default:=$cc}
3303 : ${dep_cc_default:=$cc}
3304 : ${ld_default:=$cc}
3305 : ${host_ld_default:=$host_cc}
3306 set_default ar as objcc dep_cc ld host_ld
3307
3308 probe_cc as "$as"
3309 asflags_filter=$_flags_filter
3310 add_asflags $_flags $_cflags
3311 set_ccvars AS
3312
3313 probe_cc objcc "$objcc"
3314 objcflags_filter=$_flags_filter
3315 add_objcflags $_flags $_cflags
3316 set_ccvars OBJC
3317
3318 probe_cc ld "$ld"
3319 ldflags_filter=$_flags_filter
3320 add_ldflags $_flags $_ldflags
3321 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3322 LD_O=${_ld_o-$LD_O}
3323 LD_LIB=${_ld_lib-$LD_LIB}
3324 LD_PATH=${_ld_path-$LD_PATH}
3325
3326 probe_cc hostld "$host_ld"
3327 host_ldflags_filter=$_flags_filter
3328 add_host_ldflags $_flags $_ldflags
3329 HOSTLD_O=${_ld_o-$HOSTLD_O}
3330
3331 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3332     probe_cc depcc "$dep_cc"
3333     CCDEP=${_DEPCMD:-$DEPCMD}
3334     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3335     DEPCCFLAGS=$_flags
3336 fi
3337
3338 if $ar 2>&1 | grep -q Microsoft; then
3339     arflags="-nologo"
3340     ar_o='-out:$@'
3341 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3342     arflags="rq"
3343     ar_o='$@'
3344 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3345     arflags='-Xany -r -c'
3346     ar_o='$@'
3347 else
3348     arflags="rc"
3349     ar_o='$@'
3350 fi
3351
3352 add_cflags $extra_cflags
3353 add_objcflags $extra_objcflags
3354 add_asflags $extra_cflags
3355
3356 if test -n "$sysroot"; then
3357     case "$cc_type" in
3358         gcc|llvm_gcc|clang)
3359             add_cppflags --sysroot="$sysroot"
3360             add_ldflags --sysroot="$sysroot"
3361         ;;
3362         tms470)
3363             add_cppflags -I"$sysinclude"
3364             add_ldflags  --sysroot="$sysroot"
3365         ;;
3366     esac
3367 fi
3368
3369 if test "$cpu" = host; then
3370     enabled cross_compile &&
3371         die "--cpu=host makes no sense when cross-compiling."
3372
3373     case "$cc_type" in
3374         gcc|llvm_gcc)
3375             check_native(){
3376                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3377                 sed -n "/cc1.*$1=/{
3378                             s/.*$1=\\([^ ]*\\).*/\\1/
3379                             p
3380                             q
3381                         }" $TMPE
3382             }
3383             cpu=$(check_native -march || check_native -mcpu)
3384         ;;
3385     esac
3386
3387     test "${cpu:-host}" = host &&
3388         die "--cpu=host not supported with compiler $cc"
3389 fi
3390
3391 # Deal with common $arch aliases
3392 case "$arch" in
3393     aarch64|arm64)
3394         arch="aarch64"
3395     ;;
3396     arm*)
3397         arch="arm"
3398     ;;
3399     mips*|IP*)
3400         case "$arch" in
3401         *el)
3402             add_cppflags -EL
3403             add_ldflags -EL
3404         ;;
3405         *eb)
3406             add_cppflags -EB
3407             add_ldflags -EB
3408         ;;
3409         esac
3410         arch="mips"
3411     ;;
3412     parisc*|hppa*)
3413         arch="parisc"
3414     ;;
3415     "Power Macintosh"|ppc*|powerpc*)
3416         arch="ppc"
3417     ;;
3418     s390|s390x)
3419         arch="s390"
3420     ;;
3421     sh4|sh)
3422         arch="sh4"
3423     ;;
3424     sun4u|sparc*)
3425         arch="sparc"
3426     ;;
3427     tilegx|tile-gx)
3428         arch="tilegx"
3429     ;;
3430     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3431         arch="x86"
3432     ;;
3433 esac
3434
3435 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3436 enable $arch
3437
3438 # Add processor-specific flags
3439 if enabled aarch64; then
3440
3441     case $cpu in
3442         armv*)
3443             cpuflags="-march=$cpu"
3444         ;;
3445         *)
3446             cpuflags="-mcpu=$cpu"
3447         ;;
3448     esac
3449
3450 elif enabled alpha; then
3451
3452     cpuflags="-mcpu=$cpu"
3453
3454 elif enabled arm; then
3455
3456     check_arm_arch() {
3457         check_cpp_condition stddef.h \
3458             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3459             $cpuflags
3460     }
3461
3462     probe_arm_arch() {
3463         if   check_arm_arch 4;        then echo armv4
3464         elif check_arm_arch 4T;       then echo armv4t
3465         elif check_arm_arch 5;        then echo armv5
3466         elif check_arm_arch 5E;       then echo armv5e
3467         elif check_arm_arch 5T;       then echo armv5t
3468         elif check_arm_arch 5TE;      then echo armv5te
3469         elif check_arm_arch 5TEJ;     then echo armv5te
3470         elif check_arm_arch 6;        then echo armv6
3471         elif check_arm_arch 6J;       then echo armv6j
3472         elif check_arm_arch 6K;       then echo armv6k
3473         elif check_arm_arch 6Z;       then echo armv6z
3474         elif check_arm_arch 6ZK;      then echo armv6zk
3475         elif check_arm_arch 6T2;      then echo armv6t2
3476         elif check_arm_arch 7;        then echo armv7
3477         elif check_arm_arch 7A  7_A;  then echo armv7-a
3478         elif check_arm_arch 7S;       then echo armv7-a
3479         elif check_arm_arch 7R  7_R;  then echo armv7-r
3480         elif check_arm_arch 7M  7_M;  then echo armv7-m
3481         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3482         elif check_arm_arch 8A  8_A;  then echo armv8-a
3483         fi
3484     }
3485
3486     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3487
3488     case $cpu in
3489         armv*)
3490             cpuflags="-march=$cpu"
3491             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3492         ;;
3493         *)
3494             cpuflags="-mcpu=$cpu"
3495             case $cpu in
3496                 cortex-a*)                               subarch=armv7a  ;;
3497                 cortex-r*)                               subarch=armv7r  ;;
3498                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3499                 arm11*)                                  subarch=armv6   ;;
3500                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3501                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3502                 *)                             subarch=$(probe_arm_arch) ;;
3503             esac
3504         ;;
3505     esac
3506
3507     case "$subarch" in
3508         armv5t*)    enable fast_clz                ;;
3509         armv[6-8]*) enable fast_clz fast_unaligned ;;
3510     esac
3511
3512 elif enabled avr32; then
3513
3514     case $cpu in
3515         ap7[02]0[0-2])
3516             subarch="avr32_ap"
3517             cpuflags="-mpart=$cpu"
3518         ;;
3519         ap)
3520             subarch="avr32_ap"
3521             cpuflags="-march=$cpu"
3522         ;;
3523         uc3[ab]*)
3524             subarch="avr32_uc"
3525             cpuflags="-mcpu=$cpu"
3526         ;;
3527         uc)
3528             subarch="avr32_uc"
3529             cpuflags="-march=$cpu"
3530         ;;
3531     esac
3532
3533 elif enabled bfin; then
3534
3535     cpuflags="-mcpu=$cpu"
3536
3537 elif enabled mips; then
3538
3539     cpuflags="-march=$cpu"
3540
3541 elif enabled ppc; then
3542
3543     disable ldbrx
3544
3545     case $(tolower $cpu) in
3546         601|ppc601|powerpc601)
3547             cpuflags="-mcpu=601"
3548             disable altivec
3549         ;;
3550         603*|ppc603*|powerpc603*)
3551             cpuflags="-mcpu=603"
3552             disable altivec
3553         ;;
3554         604*|ppc604*|powerpc604*)
3555             cpuflags="-mcpu=604"
3556             disable altivec
3557         ;;
3558         g3|75*|ppc75*|powerpc75*)
3559             cpuflags="-mcpu=750"
3560             disable altivec
3561         ;;
3562         g4|745*|ppc745*|powerpc745*)
3563             cpuflags="-mcpu=7450"
3564             disable vsx
3565         ;;
3566         74*|ppc74*|powerpc74*)
3567             cpuflags="-mcpu=7400"
3568             disable vsx
3569         ;;
3570         g5|970|ppc970|powerpc970)
3571             cpuflags="-mcpu=970"
3572             disable vsx
3573         ;;
3574         power[3-6]*)
3575             cpuflags="-mcpu=$cpu"
3576             disable vsx
3577         ;;
3578         power[7-8]*)
3579             cpuflags="-mcpu=$cpu"
3580             enable ldbrx
3581         ;;
3582         cell)
3583             cpuflags="-mcpu=cell"
3584             enable ldbrx
3585             disable vsx
3586         ;;
3587         e500mc)
3588             cpuflags="-mcpu=e500mc"
3589             disable altivec
3590         ;;
3591         e500v2)
3592             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3593             disable altivec
3594             disable dcbzl
3595         ;;
3596         e500)
3597             cpuflags="-mcpu=8540 -mhard-float"
3598             disable altivec
3599             disable dcbzl
3600         ;;
3601     esac
3602
3603 elif enabled sparc; then
3604
3605     case $cpu in
3606         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3607             cpuflags="-mcpu=$cpu"
3608         ;;
3609         ultrasparc*|niagara[234])
3610             cpuflags="-mcpu=$cpu"
3611         ;;
3612     esac
3613
3614 elif enabled x86; then
3615
3616     case $cpu in
3617         i[345]86|pentium)
3618             cpuflags="-march=$cpu"
3619             disable i686
3620             disable mmx
3621         ;;
3622         # targets that do NOT support nopl and conditional mov (cmov)
3623         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3624             cpuflags="-march=$cpu"
3625             disable i686
3626         ;;
3627         # targets that do support nopl and conditional mov (cmov)
3628         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3629             cpuflags="-march=$cpu"
3630             enable i686
3631             enable fast_cmov
3632         ;;
3633         # targets that do support conditional mov but on which it's slow
3634         pentium4|pentium4m|prescott|nocona)
3635             cpuflags="-march=$cpu"
3636             enable i686
3637             disable fast_cmov
3638         ;;
3639     esac
3640
3641 fi
3642
3643 if [ "$cpu" != generic ]; then
3644     add_cflags  $cpuflags
3645     add_asflags $cpuflags
3646     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3647 fi
3648
3649 # compiler sanity check
3650 check_exec <<EOF
3651 int main(void){ return 0; }
3652 EOF
3653 if test "$?" != 0; then
3654     echo "$cc is unable to create an executable file."
3655     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3656         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3657         echo "Only do this if you know what cross compiling means."
3658     fi
3659     die "C compiler test failed."
3660 fi
3661
3662 add_cppflags -D_ISOC99_SOURCE
3663 check_cflags -std=c99
3664 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3665 #include <stdlib.h>
3666 EOF
3667 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3668 #include <stdlib.h>
3669 EOF
3670
3671 add_host_cppflags -D_ISOC99_SOURCE
3672 check_host_cflags -std=c99
3673 check_host_cflags -Wall
3674 check_host_cflags -O3
3675
3676 check_64bit(){
3677     arch32=$1
3678     arch64=$2
3679     expr=$3
3680     check_code cc "" "int test[2*($expr) - 1]" &&
3681         subarch=$arch64 || subarch=$arch32
3682 }
3683
3684 case "$arch" in
3685     aarch64|alpha|ia64)
3686         spic=$shared
3687     ;;
3688     mips)
3689         check_64bit mips mips64 '_MIPS_SIM > 1'
3690         spic=$shared
3691     ;;
3692     parisc)
3693         check_64bit parisc parisc64 'sizeof(void *) > 4'
3694         spic=$shared
3695     ;;
3696     ppc)
3697         check_64bit ppc ppc64 'sizeof(void *) > 4'
3698         spic=$shared
3699     ;;
3700     s390)
3701         check_64bit s390 s390x 'sizeof(void *) > 4'
3702         spic=$shared
3703     ;;
3704     sparc)
3705         check_64bit sparc sparc64 'sizeof(void *) > 4'
3706         spic=$shared
3707     ;;
3708     x86)
3709         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3710         if test "$subarch" = "x86_64"; then
3711             spic=$shared
3712         fi
3713     ;;
3714 esac
3715
3716 enable $subarch
3717 enabled spic && enable_weak pic
3718
3719 # OS specific
3720 case $target_os in
3721     aix)
3722         SHFLAGS=-shared
3723         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3724         enabled shared && add_ldflags -Wl,-brtl
3725         ;;
3726     android)
3727         disable symver
3728         enable section_data_rel_ro
3729         SLIB_INSTALL_NAME='$(SLIBNAME)'
3730         SLIB_INSTALL_LINKS=
3731         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3732         ;;
3733     haiku)
3734         prefix_default="/boot/common"
3735         network_extralibs="-lnetwork"
3736         host_libs=
3737         ;;
3738     sunos)
3739         SHFLAGS='-shared -Wl,-h,$$(@F)'
3740         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3741         network_extralibs="-lsocket -lnsl"
3742         # When using suncc to build, the Solaris linker will mark
3743         # an executable with each instruction set encountered by
3744         # the Solaris assembler.  As our libraries contain their own
3745         # guards for processor-specific code, instead suppress
3746         # generation of the HWCAPS ELF section on Solaris x86 only.
3747         enabled_all suncc x86 &&
3748             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3749             add_ldflags -Wl,-M,mapfile
3750         nm_default='nm -P -g'
3751         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3752         ;;
3753     netbsd)
3754         disable symver
3755         oss_indev_extralibs="-lossaudio"
3756         oss_outdev_extralibs="-lossaudio"
3757         ;;
3758     openbsd|bitrig)
3759         disable symver
3760         SHFLAGS='-shared'
3761         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3762         SLIB_INSTALL_LINKS=
3763         oss_indev_extralibs="-lossaudio"
3764         oss_outdev_extralibs="-lossaudio"
3765         ;;
3766     dragonfly)
3767         disable symver
3768         ;;
3769     freebsd)
3770         ;;
3771     bsd/os)
3772         add_extralibs -lpoll -lgnugetopt
3773         ;;
3774     darwin)
3775         enabled ppc && add_asflags -force_cpusubtype_ALL
3776         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3777         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3778         add_ldflags -Wl,-dynamic,-search_paths_first
3779         SLIBSUF=".dylib"
3780         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3781         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3782         objformat="macho"
3783         enabled x86_64 && objformat="macho64"
3784         enabled_any pic shared ||
3785             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3786         check_header dispatch/dispatch.h &&
3787             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3788         ;;
3789     msys*)
3790         die "Native MSYS builds are discouraged, please use the MINGW environment."
3791         ;;
3792     mingw32*|mingw64*)
3793         if test $target_os = "mingw32ce"; then
3794             disable network
3795         else
3796             target_os=mingw32
3797         fi
3798         LIBTARGET=i386
3799         if enabled x86_64; then
3800             LIBTARGET="i386:x86-64"
3801         elif enabled arm; then
3802             LIBTARGET=arm-wince
3803         fi
3804         check_ldflags -Wl,--nxcompat
3805         check_ldflags -Wl,--dynamicbase
3806         shlibdir_default="$bindir_default"
3807         SLIBPREF=""
3808         SLIBSUF=".dll"
3809         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3810         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3811         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3812         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3813         SLIB_INSTALL_LINKS=
3814         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3815         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3816         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3817         objformat="win32"
3818         dlltool="${cross_prefix}dlltool"
3819         ranlib=:
3820         enable dos_paths
3821         ;;
3822     win32|win64)
3823         disable symver
3824         if enabled shared; then
3825             # Link to the import library instead of the normal static library
3826             # for shared libs.
3827             LD_LIB='%.lib'
3828             # Cannot build both shared and static libs with MSVC or icl.
3829             disable static
3830         fi
3831         shlibdir_default="$bindir_default"
3832         SLIBPREF=""
3833         SLIBSUF=".dll"
3834         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3835         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3836         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3837         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3838         SLIB_INSTALL_LINKS=
3839         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3840         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3841         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3842         objformat="win32"
3843         ranlib=:
3844         enable dos_paths
3845         ;;
3846     cygwin*)
3847         target_os=cygwin
3848         shlibdir_default="$bindir_default"
3849         SLIBPREF="cyg"
3850         SLIBSUF=".dll"
3851         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3852         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3853         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3854         SLIB_INSTALL_LINKS=
3855         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3856         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3857         objformat="win32"
3858         enable dos_paths
3859         ;;
3860     *-dos|freedos|opendos)
3861         network_extralibs="-lsocket"
3862         objformat="coff"
3863         enable dos_paths
3864         add_cppflags -U__STRICT_ANSI__
3865         ;;
3866     linux)
3867         enable dv1394
3868         enable section_data_rel_ro
3869         ;;
3870     irix*)
3871         target_os=irix
3872         ranlib="echo ignoring ranlib"
3873         ;;
3874     os/2*)
3875         ln_s="cp -f"
3876         objformat="aout"
3877         add_cppflags -D_GNU_SOURCE
3878         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3879         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3880         LIBSUF="_s.a"
3881         SLIBPREF=""
3882         SLIBSUF=".dll"
3883         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3884         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3885         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3886             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3887             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3888             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3889             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3890         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3891             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3892         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3893         enable dos_paths
3894         ;;
3895     gnu/kfreebsd)
3896         add_cppflags -D_BSD_SOURCE
3897         ;;
3898     gnu)
3899         ;;
3900     qnx)
3901         add_cppflags -D_QNX_SOURCE
3902         network_extralibs="-lsocket"
3903         ;;
3904     symbian)
3905         SLIBSUF=".dll"
3906         enable dos_paths
3907         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3908         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3909         add_ldflags -Wl,--target1-abs,--no-undefined \
3910                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3911                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3912         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3913                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3914                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3915         ;;
3916     osf1)
3917         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3918         ;;
3919     minix)
3920         ;;
3921     plan9)
3922         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3923                      -D_REENTRANT_SOURCE        \
3924                      -D_RESEARCH_SOURCE         \
3925                      -DFD_SETSIZE=96            \
3926                      -DHAVE_SOCK_OPTS
3927         add_compat strtod.o strtod=avpriv_strtod
3928         network_extralibs='-lbsd'
3929         exeobjs=compat/plan9/main.o
3930         cp_f='cp'
3931         ;;
3932     none)
3933         ;;
3934     *)
3935         die "Unknown OS '$target_os'."
3936         ;;
3937 esac
3938
3939 # determine libc flavour
3940
3941 probe_libc(){
3942     pfx=$1
3943     pfx_no_=${pfx%_}
3944     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3945     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3946         eval ${pfx}libc_type=uclibc
3947         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3948     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3949         eval ${pfx}libc_type=glibc
3950         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3951     # MinGW headers can be installed on Cygwin, so check for newlib first.
3952     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3953         eval ${pfx}libc_type=newlib
3954         add_${pfx}cppflags -U__STRICT_ANSI__
3955     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3956     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3957         eval ${pfx}libc_type=mingw64
3958         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3959         eval test \$${pfx_no_}cc_type = "gcc" &&
3960             add_${pfx}cppflags -D__printf__=__gnu_printf__
3961     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3962          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3963         eval ${pfx}libc_type=mingw32
3964         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3965             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3966             die "ERROR: MinGW32 runtime version must be >= 3.15."
3967         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3968         eval test \$${pfx_no_}cc_type = "gcc" &&
3969             add_${pfx}cppflags -D__printf__=__gnu_printf__
3970     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3971         eval ${pfx}libc_type=msvcrt
3972         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3973             if [ "$pfx" = host_ ]; then
3974                 add_host_cppflags -Dsnprintf=_snprintf
3975             else
3976                 add_compat strtod.o strtod=avpriv_strtod
3977                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3978                                              _snprintf=avpriv_snprintf  \
3979                                              vsnprintf=avpriv_vsnprintf
3980             fi
3981         fi
3982         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3983         # 0x601 by default unless something else is set by the user.
3984         # This can easily lead to us detecting functions only present
3985         # in such new versions and producing binaries requiring windows 7.0.
3986         # Therefore explicitly set the default to XP unless the user has
3987         # set something else on the command line.
3988         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3989         # family. For these cases, configure is free to use any functions
3990         # found in the SDK headers by default. (Alternatively, we could force
3991         # _WIN32_WINNT to 0x0602 in that case.)
3992         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3993             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3994 #ifdef WINAPI_FAMILY
3995 #include <winapifamily.h>
3996 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3997 #error not desktop
3998 #endif
3999 #endif
4000 EOF
4001     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4002         eval ${pfx}libc_type=klibc
4003     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4004         eval ${pfx}libc_type=bionic
4005     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4006         eval ${pfx}libc_type=solaris
4007         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4008     else
4009         eval ${pfx}libc_type=default
4010         add_${pfx}cppflags -D_DEFAULT_SOURCE
4011     fi
4012 }
4013
4014 probe_libc
4015 test -n "$libc_type" && enable libc_$libc_type
4016 probe_libc host_
4017 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4018
4019 case $libc_type in
4020     bionic)
4021         add_compat strtod.o strtod=avpriv_strtod
4022         ;;
4023 esac
4024
4025 # hacks for compiler/libc/os combinations
4026
4027 if enabled_all tms470 libc_glibc; then
4028     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4029     add_cppflags -D__USER_LABEL_PREFIX__=
4030     add_cppflags -D__builtin_memset=memset
4031     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4032     add_cflags   -pds=48    # incompatible redefinition of macro
4033 fi
4034
4035 if enabled_all ccc libc_glibc; then
4036     add_ldflags -Wl,-z,now  # calls to libots crash without this
4037 fi
4038
4039 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4040     add_cppflags '-I\$(SRC_PATH)/compat/float'
4041
4042 esc(){
4043     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4044 }
4045
4046 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4047
4048 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4049
4050 set_default $PATHS_LIST
4051 set_default nm
4052
4053 # we need to build at least one lib type
4054 if ! enabled_any static shared; then
4055     cat <<EOF
4056 At least one library type must be built.
4057 Specify --enable-static to build the static libraries or --enable-shared to
4058 build the shared libraries as well. To only build the shared libraries specify
4059 --disable-static in addition to --enable-shared.
4060 EOF
4061     exit 1
4062 fi
4063
4064 die_license_disabled() {
4065     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4066 }
4067
4068 die_license_disabled gpl libcdio
4069 die_license_disabled gpl libx264
4070 die_license_disabled gpl libx265
4071 die_license_disabled gpl libxavs
4072 die_license_disabled gpl libxvid
4073 die_license_disabled gpl x11grab
4074
4075 die_license_disabled nonfree cuda
4076 die_license_disabled nonfree libfaac
4077 die_license_disabled nonfree libfdk_aac
4078 die_license_disabled nonfree libnpp
4079 die_license_disabled nonfree openssl
4080
4081 die_license_disabled version3 libopencore_amrnb
4082 die_license_disabled version3 libopencore_amrwb
4083 die_license_disabled version3 libvo_aacenc
4084 die_license_disabled version3 libvo_amrwbenc
4085
4086 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4087
4088 disabled optimizations || check_cflags -fomit-frame-pointer
4089
4090 enable_weak_pic() {
4091     disabled pic && return
4092     enable pic
4093     add_cppflags -DPIC
4094     case "$target_os" in
4095     mingw*|cygwin*)
4096         ;;
4097     *)
4098         add_cflags -fPIC
4099         ;;
4100     esac
4101     add_asflags  -fPIC
4102 }
4103
4104 enabled pic && enable_weak_pic
4105
4106 check_cc <<EOF || die "Symbol mangling check failed."
4107 int ff_extern;
4108 EOF
4109 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4110 extern_prefix=${sym%%ff_extern*}
4111
4112 check_cc <<EOF && enable_weak inline_asm
4113 void foo(void) { __asm__ volatile ("" ::); }
4114 EOF
4115
4116 _restrict=
4117 for restrict_keyword in restrict __restrict__ __restrict; do
4118     check_cc <<EOF && _restrict=$restrict_keyword && break
4119 void foo(char * $restrict_keyword p);
4120 EOF
4121 done
4122
4123 check_cc <<EOF && enable pragma_deprecated
4124 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4125 EOF
4126
4127 check_cc <<EOF && enable attribute_packed
4128 struct { int x; } __attribute__((packed)) x;
4129 EOF
4130
4131 check_cc <<EOF && enable attribute_may_alias
4132 union { int x; } __attribute__((may_alias)) x;
4133 EOF
4134
4135 check_cc <<EOF || die "endian test failed"
4136 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4137 EOF
4138 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4139
4140 check_gas() {
4141     log "check_gas using '$as' as AS"
4142     # :vararg is used on aarch64, arm and ppc altivec
4143     check_as <<EOF || return 1
4144 .macro m n, y:vararg=0
4145 \n: .int \y
4146 .endm
4147 m x
4148 EOF
4149     # .altmacro is only used in arm asm
4150     ! enabled arm || check_as <<EOF || return 1
4151 .altmacro
4152 EOF
4153     enable gnu_as
4154     return 0
4155 }
4156
4157 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4158     nogas=:
4159     enabled_any arm aarch64 && nogas=die
4160     enabled_all ppc altivec && nogas=warn
4161     as_noop=-v
4162
4163     case $as_type in
4164         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4165         gcc)  gaspp_as_type=gas ;;
4166         *)    gaspp_as_type=$as_type ;;
4167     esac
4168
4169     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4170
4171     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4172         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4173
4174     if ! check_gas ; then
4175         as=${gas:=$as}
4176         check_gas || \
4177             $nogas "GNU assembler not found, install/update gas-preprocessor"
4178     fi
4179
4180     check_as <<EOF && enable as_func
4181 .func test
4182 .endfunc
4183 EOF
4184 fi
4185
4186 check_inline_asm inline_asm_labels '"1:\n"'
4187
4188 if enabled aarch64; then
4189     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4190     # internal assembler in clang 3.3 does not support this instruction
4191     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4192     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4193
4194     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4195
4196 elif enabled alpha; then
4197
4198     check_cflags -mieee
4199
4200 elif enabled arm; then
4201
4202     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4203     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4204     enabled thumb && check_cflags -mthumb || check_cflags -marm
4205
4206     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4207         enable vfp_args
4208     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4209         enable vfp_args
4210     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4211         case "${cross_prefix:-$cc}" in
4212             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4213             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4214 __asm__ (".eabi_attribute 28, 1");
4215 int main(void) { return 0; }
4216 EOF
4217         esac
4218         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4219     fi
4220
4221     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4222     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4223     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4224     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4225     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4226     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4227
4228     [ $target_os = linux ] || [ $target_os = android ] ||
4229         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4230             $ARCH_EXT_LIST_ARM
4231
4232     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4233
4234     check_as <<EOF && enable as_dn_directive
4235 ra .dn d0.i16
4236 .unreq ra
4237 EOF
4238
4239     # llvm's integrated assembler supports .object_arch from llvm 3.5
4240     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4241 .object_arch armv4
4242 EOF
4243
4244     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4245
4246 elif enabled mips; then
4247
4248     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4249
4250     # make sure that only an instruction set is enabled
4251     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4252
4253     if enabled mips64; then
4254         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4255             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4256                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4257     else
4258         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4259             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4260                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4261     fi
4262
4263 elif enabled parisc; then
4264
4265     if enabled gcc; then
4266         case $($cc -dumpversion) in
4267             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4268         esac
4269     fi
4270
4271 elif enabled ppc; then
4272
4273     enable local_aligned_8 local_aligned_16
4274
4275     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4276     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4277     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4278     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4279
4280     # AltiVec flags: The FSF version of GCC differs from the Apple version
4281     if enabled altivec; then
4282         check_cflags -maltivec -mabi=altivec &&
4283         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4284         check_cflags -faltivec
4285
4286         # check if our compiler supports Motorola AltiVec C API
4287         check_cc <<EOF || disable altivec
4288 $inc_altivec_h
4289 int main(void) {
4290     vector signed int v1 = (vector signed int) { 0 };
4291     vector signed int v2 = (vector signed int) { 1 };
4292     v1 = vec_add(v1, v2);
4293     return 0;
4294 }
4295 EOF
4296
4297         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4298     fi
4299
4300     if enabled vsx; then
4301         check_cflags -mvsx &&
4302         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4303     fi
4304
4305     if enabled power8; then
4306         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4307     fi
4308
4309 elif enabled x86; then
4310
4311     check_builtin rdtsc    intrin.h   "__rdtsc()"
4312     check_builtin mm_empty mmintrin.h "_mm_empty()"
4313
4314     enable local_aligned_8 local_aligned_16
4315
4316     # check whether EBP is available on x86
4317     # As 'i' is stored on the stack, this program will crash
4318     # if the base pointer is used to access it because the
4319     # base pointer is cleared in the inline assembly code.
4320     check_exec_crash <<EOF && enable ebp_available
4321 volatile int i=0;
4322 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4323 return i;
4324 EOF
4325
4326     # check whether EBX is available on x86
4327     check_inline_asm ebx_available '""::"b"(0)' &&
4328         check_inline_asm ebx_available '"":::"%ebx"'
4329
4330     # check whether xmm clobbers are supported
4331     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4332
4333     # check whether binutils is new enough to compile SSSE3/MMXEXT
4334     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4335     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4336
4337     if ! disabled_any asm mmx yasm; then
4338         if check_cmd $yasmexe --version; then
4339             enabled x86_64 && yasm_extra="-m amd64"
4340             yasm_debug="-g dwarf2"
4341         elif check_cmd nasm -v; then
4342             yasmexe=nasm
4343             yasm_debug="-g -F dwarf"
4344             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4345         fi
4346
4347         YASMFLAGS="-f $objformat $yasm_extra"
4348         enabled pic               && append YASMFLAGS "-DPIC"
4349         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4350         case "$objformat" in
4351             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4352         esac
4353
4354         check_yasm "movbe ecx, [5]" && enable yasm ||
4355             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4356         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4357         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4358         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4359         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4360         check_yasm "CPU amdnop" || disable cpunop
4361     fi
4362
4363     case "$cpu" in
4364         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4365             disable fast_clz
4366         ;;
4367     esac
4368
4369 fi
4370
4371 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4372
4373 check_ldflags -Wl,--as-needed
4374
4375 if check_func dlopen; then
4376     ldl=
4377 elif check_func dlopen -ldl; then
4378     ldl=-ldl
4379 fi
4380
4381 if ! disabled network; then
4382     check_func getaddrinfo $network_extralibs
4383     check_func inet_aton $network_extralibs
4384
4385     check_type netdb.h "struct addrinfo"
4386     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4387     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4388     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4389     check_type poll.h "struct pollfd"
4390     check_type netinet/sctp.h "struct sctp_event_subscribe"
4391     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4392     check_type netinet/in.h "struct sockaddr_in6"
4393     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4394     check_type "sys/types.h sys/socket.h" socklen_t
4395
4396     # Prefer arpa/inet.h over winsock2
4397     if check_header arpa/inet.h ; then
4398         check_func closesocket
4399     elif check_header winsock2.h ; then
4400         check_func_headers winsock2.h closesocket -lws2 &&
4401             network_extralibs="-lws2" ||
4402         { check_func_headers winsock2.h closesocket -lws2_32 &&
4403             network_extralibs="-lws2_32"; } || disable winsock2_h network
4404         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4405
4406         check_type ws2tcpip.h socklen_t
4407         check_type ws2tcpip.h "struct addrinfo"
4408         check_type ws2tcpip.h "struct group_source_req"
4409         check_type ws2tcpip.h "struct ip_mreq_source"
4410         check_type ws2tcpip.h "struct ipv6_mreq"
4411         check_type winsock2.h "struct pollfd"
4412         check_struct winsock2.h "struct sockaddr" sa_len
4413         check_type ws2tcpip.h "struct sockaddr_in6"
4414         check_type ws2tcpip.h "struct sockaddr_storage"
4415     else
4416         disable network
4417     fi
4418 fi
4419
4420 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4421 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4422 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4423 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4424
4425 case "$custom_allocator" in
4426     jemalloc)
4427         # jemalloc by default does not use a prefix
4428         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4429     ;;
4430     tcmalloc)
4431         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4432         malloc_prefix=tc_
4433     ;;
4434 esac
4435
4436 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4437 check_func  ${malloc_prefix}memalign            && enable memalign
4438 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4439
4440 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4441     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4442
4443 check_func  fcntl
4444 check_func  fork
4445 check_func  gethrtime
4446 check_func  getopt
4447 check_func  getrusage
4448 check_func  gettimeofday
4449 check_func  gmtime_r
4450 check_func  isatty
4451 check_func  localtime_r
4452 check_func  mach_absolute_time
4453 check_func  mkstemp
4454 check_func  mmap
4455 check_func  mprotect
4456 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4457 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4458 check_func  sched_getaffinity
4459 check_func  setrlimit
4460 check_func  strerror_r
4461 check_func  sysconf
4462 check_func  sysctl
4463 check_func  usleep
4464
4465 check_func_headers io.h setmode
4466 check_func_headers stdlib.h getenv
4467
4468 check_func_headers windows.h CoTaskMemFree -lole32
4469 check_func_headers windows.h GetProcessAffinityMask
4470 check_func_headers windows.h GetProcessTimes
4471 check_func_headers windows.h GetSystemTimeAsFileTime
4472 check_func_headers windows.h LoadLibrary
4473 check_func_headers windows.h MapViewOfFile
4474 check_func_headers windows.h SetConsoleTextAttribute
4475 check_func_headers windows.h Sleep
4476 check_func_headers windows.h VirtualAlloc
4477 check_struct windows.h "CONDITION_VARIABLE" Ptr
4478
4479 check_header direct.h
4480 check_header dlfcn.h
4481 check_header d3d11.h
4482 check_header dxva.h
4483 check_header dxva2api.h
4484 check_header io.h
4485 check_header mach/mach_time.h
4486 check_header malloc.h
4487 check_header poll.h
4488 check_header sys/mman.h
4489 check_header sys/param.h
4490 check_header sys/resource.h
4491 check_header sys/select.h
4492 check_header sys/time.h
4493 check_header sys/un.h
4494 check_header unistd.h
4495 check_header valgrind/valgrind.h
4496 check_header vdpau/vdpau.h
4497 check_header vdpau/vdpau_x11.h
4498 check_header VideoDecodeAcceleration/VDADecoder.h
4499 check_header windows.h
4500 check_header X11/extensions/XvMClib.h
4501
4502 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4503 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4504 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4505
4506 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4507
4508 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4509 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4510 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4511
4512 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4513 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4514 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4515 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4516
4517 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4518
4519 if ! disabled w32threads && ! enabled pthreads; then
4520     check_func_headers "windows.h process.h" _beginthreadex &&
4521         enable w32threads || disable w32threads
4522 fi
4523
4524 # check for some common methods of building with pthread support
4525 # do this before the optional library checks as some of them require pthreads
4526 if ! disabled pthreads && ! enabled w32threads; then
4527     enable pthreads
4528     if check_func pthread_join -pthread; then
4529         add_cflags -pthread
4530         add_extralibs -pthread
4531     elif check_func pthread_join -pthreads; then
4532         add_cflags -pthreads
4533         add_extralibs -pthreads
4534     elif check_func pthread_join -lpthreadGC2; then
4535         add_extralibs -lpthreadGC2
4536     elif check_lib pthread.h pthread_join -lpthread; then
4537         :
4538     elif ! check_func pthread_join; then
4539         disable pthreads
4540     fi
4541 fi
4542
4543 enabled pthreads &&
4544     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4545
4546 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4547 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4548
4549 check_lib math.h sin -lm && LIBM="-lm"
4550 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4551
4552 atan2f_args=2
4553 ldexpf_args=2
4554 powf_args=2
4555
4556 for func in $MATH_FUNCS; do
4557     eval check_mathfunc $func \${${func}_args:-1}
4558 done
4559
4560 # these are off by default, so fail if requested and not available
4561 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4562                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4563                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4564 enabled cuda              && check_lib cuda.h cuInit -lcuda
4565 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4566 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4567 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4568 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4569 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4570 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4571 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4572 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4573 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4574                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4575                                done || die "ERROR: libgsm not found"; }
4576 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4577 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4578 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4579 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4580 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4581 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4582 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4583 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4584 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4585 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4586                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4587 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4588 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4589 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4590 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4591 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4592 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4593 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4594 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4595 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4596 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4597 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4598 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4599     enabled libvpx_vp8_decoder && {
4600         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4601             disable libvpx_vp8_decoder;
4602     }
4603     enabled libvpx_vp8_encoder && {
4604         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4605             disable libvpx_vp8_encoder;
4606     }
4607     enabled libvpx_vp9_decoder && {
4608         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4609             disable libvpx_vp9_decoder;
4610     }
4611     enabled libvpx_vp9_encoder && {
4612         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4613             disable libvpx_vp9_encoder;
4614     }
4615     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4616         die "libvpx enabled but no supported decoders found"
4617     fi
4618 }
4619 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4620 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4621 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4622                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4623                                die "ERROR: libx264 version must be >= 0.118."; } &&
4624                              { check_cpp_condition x264.h "X264_MPEG2" &&
4625                                enable libx262; }
4626 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4627                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4628                                die "ERROR: libx265 version must be >= 57."; }
4629 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4630 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4631 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4632                                 { ! enabled cross_compile && {
4633                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4634                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4635                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4636                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4637                                die "ERROR: mmal not found"; }
4638 enabled mmal && check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"
4639 enabled omx_rpi && enable omx
4640 enabled omx               && { check_header OMX_Core.h ||
4641                                 { ! enabled cross_compile && enabled omx_rpi && {
4642                                     add_cflags -isystem/opt/vc/include/IL ; }
4643                                 check_header OMX_Core.h ; } ||
4644                                die "ERROR: OpenMAX IL headers not found"; }
4645 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4646                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4647                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4648                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4649                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4650                                die "ERROR: openssl not found"; }
4651
4652 if enabled gnutls; then
4653     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4654     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4655 fi
4656
4657 # libdc1394 check
4658 if enabled libdc1394; then
4659     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4660         enable libdc1394_2; } ||
4661     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4662         enable libdc1394_1; } ||
4663     die "ERROR: No version of libdc1394 found "
4664 fi
4665
4666 if enabled nvenc; then
4667     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4668     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6" ||
4669         die "ERROR: NVENC API version 5 or older is not supported"
4670 fi
4671
4672 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4673     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4674     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4675     enable sdl
4676 fi
4677
4678 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4679 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4680
4681 check_header linux/fb.h
4682 check_header linux/videodev2.h
4683 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4684
4685 check_header AVFoundation/AVFoundation.h &&
4686     check_objcflags -fobjc-arc &&
4687     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4688     disable AVFoundation_AVFoundation_h
4689
4690 check_header sys/videoio.h
4691
4692 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4693 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4694 # w32api 3.12 had it defined wrong
4695 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4696
4697 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4698 { check_header dev/bktr/ioctl_meteor.h &&
4699   check_header dev/bktr/ioctl_bt848.h; } ||
4700 { check_header machine/ioctl_meteor.h &&
4701   check_header machine/ioctl_bt848.h; } ||
4702 { check_header dev/video/meteor/ioctl_meteor.h &&
4703   check_header dev/video/bktr/ioctl_bt848.h; } ||
4704 check_header dev/ic/bt8xx.h
4705
4706 check_header sndio.h
4707 check_header sys/soundcard.h
4708 check_header soundcard.h
4709
4710 enabled_any alsa_indev alsa_outdev &&
4711     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4712
4713 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4714     check_func jack_port_get_latency_range -ljack
4715
4716 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4717
4718 if enabled libcdio; then
4719     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4720     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4721     die "ERROR: No usable libcdio/cdparanoia found"
4722 fi
4723
4724 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4725
4726 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4727     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4728         enabled libxcb && die "ERROR: libxcb not found";
4729     } && disable x11grab && enable libxcb
4730
4731     disabled libxcb_shm ||
4732         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4733             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4734         } && check_header sys/shm.h && enable libxcb_shm
4735
4736     disabled libxcb_xfixes ||
4737         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4738             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4739         } && enable libxcb_xfixes
4740
4741     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4742     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4743 fi
4744
4745 if enabled x11grab; then
4746     enabled xlib || die "ERROR: Xlib not found"
4747     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4748     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4749 fi
4750
4751 enabled vaapi &&
4752     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4753     disable vaapi
4754
4755 if enabled vaapi ; then
4756     enabled xlib &&
4757     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4758     enable vaapi_x11
4759
4760     check_lib2 "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4761     enable vaapi_drm
4762 fi
4763
4764 enabled vdpau &&
4765     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4766     disable vdpau
4767
4768 enabled vdpau && enabled xlib &&
4769     check_lib2 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4770     enable vdpau_x11
4771
4772 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4773
4774 # add some useful compiler flags if supported
4775 check_cflags -Wdeclaration-after-statement
4776 check_cflags -Wall
4777 check_cflags -Wdisabled-optimization
4778 check_cflags -Wpointer-arith
4779 check_cflags -Wredundant-decls
4780 check_cflags -Wwrite-strings
4781 check_cflags -Wtype-limits
4782 check_cflags -Wundef
4783 check_cflags -Wmissing-prototypes
4784 check_cflags -Wstrict-prototypes
4785 enabled extra_warnings && check_cflags -Winline
4786 enabled extra_warnings && check_cflags -Wcast-qual
4787
4788 check_disable_warning(){
4789     warning_flag=-W${1#-Wno-}
4790     test_cflags $warning_flag && add_cflags $1
4791 }
4792
4793 check_disable_warning -Wno-parentheses
4794 check_disable_warning -Wno-switch
4795 check_disable_warning -Wno-format-zero-length
4796 check_disable_warning -Wno-pointer-sign
4797
4798 # add some linker flags
4799 check_ldflags -Wl,--warn-common
4800 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4801 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4802 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4803
4804 # add some strip flags
4805 # -wN '..@*' is more selective than -x, but not available everywhere.
4806 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4807
4808 enabled neon_clobber_test &&
4809     check_ldflags -Wl,--wrap,avcodec_open2              \
4810                   -Wl,--wrap,avcodec_decode_audio4      \
4811                   -Wl,--wrap,avcodec_decode_video2      \
4812                   -Wl,--wrap,avcodec_decode_subtitle2   \
4813                   -Wl,--wrap,avcodec_encode_audio2      \
4814                   -Wl,--wrap,avcodec_encode_video2      \
4815                   -Wl,--wrap,avcodec_encode_subtitle    \
4816                   -Wl,--wrap,avresample_convert ||
4817     disable neon_clobber_test
4818
4819 enabled xmm_clobber_test &&
4820     check_ldflags -Wl,--wrap,avcodec_open2              \
4821                   -Wl,--wrap,avcodec_decode_audio4      \
4822                   -Wl,--wrap,avcodec_decode_video2      \
4823                   -Wl,--wrap,avcodec_decode_subtitle2   \
4824                   -Wl,--wrap,avcodec_encode_audio2      \
4825                   -Wl,--wrap,avcodec_encode_video2      \
4826                   -Wl,--wrap,avcodec_encode_subtitle    \
4827                   -Wl,--wrap,avresample_convert         \
4828                   -Wl,--wrap,sws_scale ||
4829     disable xmm_clobber_test
4830
4831 echo "X { local: *; };" > $TMPV
4832 if test_ldflags -Wl,--version-script,$TMPV; then
4833     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4834 elif test_ldflags -Wl,-M,$TMPV; then