configure: improve the help text for external libraries
[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 Hardware accelerators:
136   --enable-d3d11va         enable D3D11VA code
137   --enable-dxva2           enable DXVA2 code
138   --enable-vaapi           enable VAAPI code
139   --enable-vda             enable VDA code
140   --enable-vdpau           enable VDPAU code
141
142 Hardware-accelerated decoding/encoding:
143   --enable-cuda            enable dynamically linked CUDA [no]
144   --enable-libmfx          enable HW acceleration through libmfx
145   --enable-mmal            enable decoding via MMAL [no]
146   --enable-nvenc           enable encoding via NVENC [no]
147   --enable-omx             enable encoding via OpenMAX IL [no]
148   --enable-omx-rpi         enable encoding via OpenMAX IL for Raspberry Pi [no]
149
150 Individual component options:
151   --disable-everything     disable all components listed below
152   --disable-encoder=NAME   disable encoder NAME
153   --enable-encoder=NAME    enable encoder NAME
154   --disable-encoders       disable all encoders
155   --disable-decoder=NAME   disable decoder NAME
156   --enable-decoder=NAME    enable decoder NAME
157   --disable-decoders       disable all decoders
158   --disable-hwaccel=NAME   disable hwaccel NAME
159   --enable-hwaccel=NAME    enable hwaccel NAME
160   --disable-hwaccels       disable all hwaccels
161   --disable-muxer=NAME     disable muxer NAME
162   --enable-muxer=NAME      enable muxer NAME
163   --disable-muxers         disable all muxers
164   --disable-demuxer=NAME   disable demuxer NAME
165   --enable-demuxer=NAME    enable demuxer NAME
166   --disable-demuxers       disable all demuxers
167   --enable-parser=NAME     enable parser NAME
168   --disable-parser=NAME    disable parser NAME
169   --disable-parsers        disable all parsers
170   --enable-bsf=NAME        enable bitstream filter NAME
171   --disable-bsf=NAME       disable bitstream filter NAME
172   --disable-bsfs           disable all bitstream filters
173   --enable-protocol=NAME   enable protocol NAME
174   --disable-protocol=NAME  disable protocol NAME
175   --disable-protocols      disable all protocols
176   --enable-indev=NAME      enable input device NAME
177   --disable-indev=NAME     disable input device NAME
178   --disable-indevs         disable input devices
179   --enable-outdev=NAME     enable output device NAME
180   --disable-outdev=NAME    disable output device NAME
181   --disable-outdevs        disable output devices
182   --disable-devices        disable all devices
183   --enable-filter=NAME     enable filter NAME
184   --disable-filter=NAME    disable filter NAME
185   --disable-filters        disable all filters
186
187 External library support:
188
189   Using any of the following switches will allow Libav to link to the
190   corresponding external library. All the components depending on that library
191   will become enabled, if all their other dependencies are met and they are not
192   explicitly disabled. E.g. --enable-libwavpack will enable linking to
193   libwavpack and allow the libwavpack encoder to be built, unless it is
194   specifically disabled with --disable-encoder=libwavpack.
195
196   Note that only the system libraries are auto-detected. All the other external
197   libraries must be explicitly enabled.
198
199   Also note that the following help text describes the purpose of the libraries
200   themselves, not all their features will necessarily be usable by Libav.
201
202   --enable-avisynth          video frameserver
203   --enable-bzlib             bzip2 compression [autodetect]
204   --enable-frei0r            video filtering plugins
205   --enable-gnutls            crypto
206   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
207   --enable-libcdio           audio CD input
208   --enable-libdc1394         IEEE 1394/Firewire camera input
209   --enable-libdcadec         DCA audio decoding
210   --enable-libfaac           AAC audio encoding
211   --enable-libfdk-aac        AAC audio encoding/decoding
212   --enable-libfontconfig     font configuration and management
213   --enable-libfreetype       font rendering
214   --enable-libgsm            GSM audio encoding/decoding
215   --enable-libilbc           ILBC audio encoding/decoding
216   --enable-libkvazaar        HEVC video encoding
217   --enable-libmp3lame        MP3 audio encoding
218   --enable-libnpp            CUDA processing
219   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
220   --enable-libopencore-amrwb AMR-WB audio decoding
221   --enable-libopencv         computer vision
222   --enable-libopenh264       H.264 video encoding/decoding
223   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
224   --enable-libopus           Opus audio encoding/decoding
225   --enable-libpulse          Pulseaudio sound server
226   --enable-librtmp           RTMP streaming
227   --enable-libschroedinger   Dirac video encoding/decoding
228   --enable-libsnappy         snappy compression
229   --enable-libspeex          Speex audio encoding/decoding
230   --enable-libtheora         Theora video encoding/decoding
231   --enable-libtwolame        MP2 audio encoding
232   --enable-libvo-aacenc      AAC audio encoding
233   --enable-libvo-amrwbenc    AMR-WB audio encoding
234   --enable-libvorbis         Vorbis audio encoding/decoding
235   --enable-libvpx            VP* video encoding/decoding
236   --enable-libwavpack        Wavpack audio encoding/decoding
237   --enable-libwebp           WebP image encoding/decoding
238   --enable-libx264           H.264 video encoding
239   --enable-libx265           HEVC video encoding
240   --enable-libxavs           Chinese AVS video encoding
241   --enable-libxcb            X window system protocol communication
242   --enable-libxcb-shm        X11 shm communication [auto]
243   --enable-libxcb-xfixes     X11 mouse rendering [auto]
244   --enable-libxvid           MPEG-4 ASP video encoding
245   --enable-openssl           crypto
246   --enable-x11grab           X11 grabbing through xlib (legacy, use xcb instead)
247   --enable-zlib              compression [autodetect]
248
249 Toolchain options:
250   --arch=ARCH              select architecture [$arch]
251   --cpu=CPU                select the minimum required CPU (affects
252                            instruction selection, may crash on older CPUs)
253   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
254   --enable-cross-compile   assume a cross-compiler is used
255   --sysroot=PATH           root of cross-build tree
256   --sysinclude=PATH        location of cross-build system headers
257   --target-os=OS           compiler targets OS [$target_os]
258   --target-exec=CMD        command to run executables on target
259   --target-path=DIR        path to view of build directory on target
260   --target-samples=DIR     path to samples directory on target
261   --toolchain=NAME         set tool defaults according to NAME
262   --nm=NM                  use nm tool
263   --ar=AR                  use archive tool AR [$ar_default]
264   --as=AS                  use assembler AS [$as_default]
265   --cc=CC                  use C compiler CC [$cc_default]
266   --objcc=OCC              use ObjC compiler OCC [$cc_default]
267   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
268   --ld=LD                  use linker LD
269   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
270   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
271   --host-cc=HOSTCC         use host C compiler HOSTCC
272   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
273   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
274   --host-ld=HOSTLD         use host linker HOSTLD
275   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
276   --host-libs=HLIBS        use libs HLIBS when linking for host
277   --host-os=OS             compiler host OS [$target_os]
278   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
279   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
280   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
281   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
282   --extra-libs=ELIBS       add ELIBS [$ELIBS]
283   --extra-version=STRING   version string suffix []
284   --optflags=OPTFLAGS      override optimization-related compiler flags
285   --build-suffix=SUFFIX    library name suffix []
286   --enable-pic             build position-independent code
287   --enable-thumb           compile for Thumb instruction set
288   --enable-lto             use link-time optimization
289   --env="ENV=override"     override the environment variables
290
291 Advanced options (experts only):
292   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
293   --custom-allocator=NAME  use a supported custom allocator
294   --disable-symver         disable symbol versioning
295   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
296   --disable-safe-bitstream-reader
297                            disable buffer boundary checking in bitreaders
298                            (faster, but may crash)
299   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
300   --enable-sram            allow use of on-chip SRAM
301
302 Optimization options (experts only):
303   --disable-asm            disable all assembly optimizations
304   --disable-altivec        disable AltiVec optimizations
305   --disable-vsx            disable VSX optimizations
306   --disable-power8         disable POWER8 optimizations
307   --disable-amd3dnow       disable 3DNow! optimizations
308   --disable-amd3dnowext    disable 3DNow! extended optimizations
309   --disable-mmx            disable MMX optimizations
310   --disable-mmxext         disable MMXEXT optimizations
311   --disable-sse            disable SSE optimizations
312   --disable-sse2           disable SSE2 optimizations
313   --disable-sse3           disable SSE3 optimizations
314   --disable-ssse3          disable SSSE3 optimizations
315   --disable-sse4           disable SSE4 optimizations
316   --disable-sse42          disable SSE4.2 optimizations
317   --disable-avx            disable AVX optimizations
318   --disable-xop            disable XOP optimizations
319   --disable-fma3           disable FMA3 optimizations
320   --disable-fma4           disable FMA4 optimizations
321   --disable-avx2           disable AVX2 optimizations
322   --disable-armv5te        disable armv5te optimizations
323   --disable-armv6          disable armv6 optimizations
324   --disable-armv6t2        disable armv6t2 optimizations
325   --disable-vfp            disable VFP optimizations
326   --disable-neon           disable NEON optimizations
327   --disable-inline-asm     disable use of inline assembly
328   --disable-yasm           disable use of nasm/yasm assembly
329
330 Developer options (useful when working on Libav itself):
331   --disable-debug          disable debugging symbols
332   --enable-debug=LEVEL     set the debug level [$debuglevel]
333   --disable-optimizations  disable compiler optimizations
334   --enable-extra-warnings  enable more compiler warnings
335   --samples=PATH           location of test samples for FATE, if not set use
336                            \$LIBAV_SAMPLES at make invocation time.
337   --enable-neon-clobber-test check NEON registers for clobbering (should be
338                            used only for debugging purposes)
339   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
340                            should be used only for debugging purposes)
341   --enable-random          randomly enable/disable components
342   --disable-random
343   --enable-random=LIST     randomly enable/disable specific components or
344   --disable-random=LIST    component groups. LIST is a comma-separated list
345                            of NAME[:PROB] entries where NAME is a component
346                            (group) and PROB the probability associated with
347                            NAME (default 0.5).
348   --random-seed=VALUE      seed value for --enable/disable-random
349   --disable-valgrind-backtrace do not print a backtrace under Valgrind
350                            (only applies to --disable-optimizations builds)
351
352 NOTE: Object files are built at the place where configure is launched.
353 EOF
354   exit 0
355 }
356
357 quotes='""'
358
359 log(){
360     echo "$@" >> $logfile
361 }
362
363 log_file(){
364     log BEGIN $1
365     i=1
366     while read line; do
367         printf '%5s   %s\n' "${i}" "${line}"
368         i=$(($i+1))
369     done < $1 >> $logfile
370     log END $1
371 }
372
373 echolog(){
374     log "$@"
375     echo "$@"
376 }
377
378 warn(){
379     log "WARNING: $*"
380     WARNINGS="${WARNINGS}WARNING: $*\n"
381 }
382
383 die(){
384     echolog "$@"
385     cat <<EOF
386
387 If you think configure made a mistake, make sure you are using the latest
388 version from Git.  If the latest version fails, report the problem to the
389 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
390 EOF
391     if disabled logging; then
392         cat <<EOF
393 Rerun configure with logging enabled (do not use --disable-logging), and
394 include the log this produces with your report.
395 EOF
396     else
397         cat <<EOF
398 Include the log file "$logfile" produced by configure as this will help
399 solving the problem.
400 EOF
401     fi
402     exit 1
403 }
404
405 # Avoid locale weirdness, besides we really just want to translate ASCII.
406 toupper(){
407     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
408 }
409
410 tolower(){
411     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
412 }
413
414 c_escape(){
415     echo "$*" | sed 's/["\\]/\\\0/g'
416 }
417
418 sh_quote(){
419     v=$(echo "$1" | sed "s/'/'\\\\''/g")
420     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
421     echo "$v"
422 }
423
424 cleanws(){
425     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
426 }
427
428 filter(){
429     pat=$1
430     shift
431     for v; do
432         eval "case $v in $pat) echo $v ;; esac"
433     done
434 }
435
436 filter_out(){
437     pat=$1
438     shift
439     for v; do
440         eval "case $v in $pat) ;; *) echo $v ;; esac"
441     done
442 }
443
444 map(){
445     m=$1
446     shift
447     for v; do eval $m; done
448 }
449
450 add_suffix(){
451     suffix=$1
452     shift
453     for v; do echo ${v}${suffix}; done
454 }
455
456 set_all(){
457     value=$1
458     shift
459     for var in $*; do
460         eval $var=$value
461     done
462 }
463
464 set_weak(){
465     value=$1
466     shift
467     for var; do
468         eval : \${$var:=$value}
469     done
470 }
471
472 sanitize_var_name(){
473     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
474 }
475
476 set_safe(){
477     var=$1
478     shift
479     eval $(sanitize_var_name "$var")='$*'
480 }
481
482 get_safe(){
483     eval echo \$$(sanitize_var_name "$1")
484 }
485
486 pushvar(){
487     for pvar in $*; do
488         eval level=\${${pvar}_level:=0}
489         eval ${pvar}_${level}="\$$pvar"
490         eval ${pvar}_level=$(($level+1))
491     done
492 }
493
494 popvar(){
495     for pvar in $*; do
496         eval level=\${${pvar}_level:-0}
497         test $level = 0 && continue
498         eval level=$(($level-1))
499         eval $pvar="\${${pvar}_${level}}"
500         eval ${pvar}_level=$level
501         eval unset ${pvar}_${level}
502     done
503 }
504
505 enable(){
506     set_all yes $*
507 }
508
509 disable(){
510     set_all no $*
511 }
512
513 enable_weak(){
514     set_weak yes $*
515 }
516
517 disable_weak(){
518     set_weak no $*
519 }
520
521 enable_safe(){
522     for var; do
523         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
524     done
525 }
526
527 disable_safe(){
528     for var; do
529         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
530     done
531 }
532
533 do_enable_deep(){
534     for var; do
535         enabled $var && continue
536         eval sel="\$${var}_select"
537         eval sgs="\$${var}_suggest"
538         pushvar var sgs
539         enable_deep $sel
540         popvar sgs
541         enable_deep_weak $sgs
542         popvar var
543     done
544 }
545
546 enable_deep(){
547     do_enable_deep $*
548     enable $*
549 }
550
551 enable_deep_weak(){
552     for var; do
553         disabled $var && continue
554         pushvar var
555         do_enable_deep $var
556         popvar var
557         enable_weak $var
558     done
559 }
560
561 enabled(){
562     test "${1#!}" = "$1" && op== || op=!=
563     eval test "x\$${1#!}" $op "xyes"
564 }
565
566 disabled(){
567     test "${1#!}" = "$1" && op== || op=!=
568     eval test "x\$${1#!}" $op "xno"
569 }
570
571 enabled_all(){
572     for opt; do
573         enabled $opt || return 1
574     done
575 }
576
577 disabled_all(){
578     for opt; do
579         disabled $opt || return 1
580     done
581 }
582
583 enabled_any(){
584     for opt; do
585         enabled $opt && return 0
586     done
587 }
588
589 disabled_any(){
590     for opt; do
591         disabled $opt && return 0
592     done
593     return 1
594 }
595
596 set_default(){
597     for opt; do
598         eval : \${$opt:=\$${opt}_default}
599     done
600 }
601
602 is_in(){
603     value=$1
604     shift
605     for var in $*; do
606         [ $var = $value ] && return 0
607     done
608     return 1
609 }
610
611 do_check_deps(){
612     for cfg; do
613         cfg="${cfg#!}"
614         enabled ${cfg}_checking && die "Circular dependency for $cfg."
615         disabled ${cfg}_checking && continue
616         enable ${cfg}_checking
617         append allopts $cfg
618
619         eval dep_all="\$${cfg}_deps"
620         eval dep_any="\$${cfg}_deps_any"
621         eval dep_sel="\$${cfg}_select"
622         eval dep_sgs="\$${cfg}_suggest"
623         eval dep_ifa="\$${cfg}_if"
624         eval dep_ifn="\$${cfg}_if_any"
625
626         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
627         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
628         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
629
630         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
631         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
632         enabled_all  $dep_all || disable $cfg
633         enabled_any  $dep_any || disable $cfg
634         disabled_any $dep_sel && disable $cfg
635
636         if enabled $cfg; then
637             enable_deep $dep_sel
638             enable_deep_weak $dep_sgs
639         fi
640
641         disable ${cfg}_checking
642     done
643 }
644
645 check_deps(){
646     unset allopts
647
648     do_check_deps "$@"
649
650     for cfg in $allopts; do
651         enabled $cfg || continue
652         eval dep_extralibs="\$${cfg}_extralibs"
653         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
654     done
655 }
656
657 print_config(){
658     pfx=$1
659     files=$2
660     shift 2
661     map 'eval echo "$v \${$v:-no}"' "$@" |
662     awk "BEGIN { split(\"$files\", files) }
663         {
664             c = \"$pfx\" toupper(\$1);
665             v = \$2;
666             sub(/yes/, 1, v);
667             sub(/no/,  0, v);
668             for (f in files) {
669                 file = files[f];
670                 if (file ~ /\\.h\$/) {
671                     printf(\"#define %s %d\\n\", c, v) >>file;
672                 } else if (file ~ /\\.asm\$/) {
673                     printf(\"%%define %s %d\\n\", c, v) >>file;
674                 } else if (file ~ /\\.mak\$/) {
675                     n = -v ? \"\" : \"!\";
676                     printf(\"%s%s=yes\\n\", n, c) >>file;
677                 }
678             }
679         }"
680 }
681
682 print_enabled(){
683     suf=$1
684     shift
685     for v; do
686         enabled $v && printf "%s\n" ${v%$suf}
687     done
688 }
689
690 append(){
691     var=$1
692     shift
693     eval "$var=\"\$$var $*\""
694 }
695
696 prepend(){
697     var=$1
698     shift
699     eval "$var=\"$* \$$var\""
700 }
701
702 unique(){
703     var=$1
704     uniq_list=""
705     for tok in $(eval echo \$$var); do
706         uniq_list="$(filter_out $tok $uniq_list) $tok"
707     done
708     eval "$var=\"${uniq_list}\""
709 }
710
711 add_cppflags(){
712     append CPPFLAGS "$@"
713 }
714
715 add_cflags(){
716     append CFLAGS $($cflags_filter "$@")
717 }
718
719 add_asflags(){
720     append ASFLAGS $($asflags_filter "$@")
721 }
722
723 add_objcflags(){
724     append OBJCFLAGS $($objcflags_filter "$@")
725 }
726
727 add_ldflags(){
728     append LDFLAGS $($ldflags_filter "$@")
729 }
730
731 add_ldexeflags(){
732     append LDEXEFLAGS $($ldflags_filter "$@")
733 }
734
735 add_stripflags(){
736     append STRIPFLAGS "$@"
737 }
738
739 add_extralibs(){
740     prepend extralibs $($ldflags_filter "$@")
741 }
742
743 add_host_cppflags(){
744     append host_cppflags "$@"
745 }
746
747 add_host_cflags(){
748     append host_cflags $($host_cflags_filter "$@")
749 }
750
751 add_host_ldflags(){
752     append host_ldflags $($host_ldflags_filter "$@")
753 }
754
755 add_compat(){
756     append compat_objs $1
757     shift
758     map 'add_cppflags -D$v' "$@"
759 }
760
761 check_cmd(){
762     log "$@"
763     "$@" >> $logfile 2>&1
764 }
765
766 cc_o(){
767     eval printf '%s\\n' $CC_O
768 }
769
770 cc_e(){
771     eval printf '%s\\n' $CC_E
772 }
773
774 check_cc(){
775     log check_cc "$@"
776     cat > $TMPC
777     log_file $TMPC
778     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
779 }
780
781 check_objcc(){
782     log check_objcc "$@"
783     cat > $TMPC
784     log_file $TMPC
785     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
786 }
787
788 check_cpp(){
789     log check_cpp "$@"
790     cat > $TMPC
791     log_file $TMPC
792     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
793 }
794
795 as_o(){
796     eval printf '%s\\n' $AS_O
797 }
798
799 check_as(){
800     log check_as "$@"
801     cat > $TMPS
802     log_file $TMPS
803     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
804 }
805
806 check_inline_asm(){
807     log check_inline_asm "$@"
808     name="$1"
809     code="$2"
810     shift 2
811     disable $name
812     check_cc "$@" <<EOF && enable $name
813 void foo(void){ __asm__ volatile($code); }
814 EOF
815 }
816
817 check_insn(){
818     log check_insn "$@"
819     check_inline_asm ${1}_inline "\"$2\""
820     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
821 }
822
823 check_yasm(){
824     log check_yasm "$@"
825     echo "$1" > $TMPS
826     log_file $TMPS
827     shift 1
828     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
829 }
830
831 ld_o(){
832     eval printf '%s\\n' $LD_O
833 }
834
835 check_ld(){
836     log check_ld "$@"
837     flags=$(filter_out '-l*' "$@")
838     libs=$(filter '-l*' "$@")
839     check_cc $($cflags_filter $flags) || return
840     flags=$($ldflags_filter $flags)
841     libs=$($ldflags_filter $libs)
842     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
843 }
844
845 print_include(){
846     hdr=$1
847     test "${hdr%.h}" = "${hdr}" &&
848         echo "#include $hdr"    ||
849         echo "#include <$hdr>"
850 }
851
852 check_code(){
853     log check_code "$@"
854     check=$1
855     headers=$2
856     code=$3
857     shift 3
858     {
859         for hdr in $headers; do
860             print_include $hdr
861         done
862         echo "int main(void) { $code; return 0; }"
863     } | check_$check "$@"
864 }
865
866 check_cppflags(){
867     log check_cppflags "$@"
868     check_cc "$@" <<EOF && append CPPFLAGS "$@"
869 int x;
870 EOF
871 }
872
873 test_cflags(){
874     log test_cflags "$@"
875     set -- $($cflags_filter "$@")
876     check_cc "$@" <<EOF
877 int x;
878 EOF
879 }
880
881 check_cflags(){
882     log check_cflags "$@"
883     test_cflags "$@" && add_cflags "$@"
884 }
885
886 test_objcflags(){
887     log test_cflags "$@"
888     set -- $($cflags_filter "$@")
889     check_objcc "$@" <<EOF
890 int x;
891 EOF
892 }
893
894 check_objcflags(){
895     log check_cflags "$@"
896     test_objcflags "$@" && add_objcflags "$@"
897 }
898
899 test_ldflags(){
900     log test_ldflags "$@"
901     check_ld "$@" <<EOF
902 int main(void){ return 0; }
903 EOF
904 }
905
906 check_ldflags(){
907     log check_ldflags "$@"
908     test_ldflags "$@" && add_ldflags "$@"
909 }
910
911 test_stripflags(){
912     log test_stripflags "$@"
913     # call check_cc to get a fresh TMPO
914     check_cc <<EOF
915 int main(void) { return 0; }
916 EOF
917     check_cmd $strip $STRIPFLAGS "$@" $TMPO
918 }
919
920 check_stripflags(){
921     log check_stripflags "$@"
922     test_stripflags "$@" && add_stripflags "$@"
923 }
924
925 check_header(){
926     log check_header "$@"
927     header=$1
928     shift
929     disable_safe $header
930     check_cpp "$@" <<EOF && enable_safe $header
931 #include <$header>
932 int x;
933 EOF
934 }
935
936 check_func(){
937     log check_func "$@"
938     func=$1
939     shift
940     disable $func
941     check_ld "$@" <<EOF && enable $func
942 extern int $func();
943 int main(void){ $func(); }
944 EOF
945 }
946
947 check_mathfunc(){
948     log check_mathfunc "$@"
949     func=$1
950     narg=$2
951     shift 2
952     test $narg = 2 && args="f, g" || args="f"
953     disable $func
954     check_ld "$@" <<EOF && enable $func
955 #include <math.h>
956 float foo(float f, float g) { return $func($args); }
957 int main(void){ return 0; }
958 EOF
959 }
960
961 check_func_headers(){
962     log check_func_headers "$@"
963     headers=$1
964     funcs=$2
965     shift 2
966     {
967         for hdr in $headers; do
968             print_include $hdr
969         done
970         for func in $funcs; do
971             echo "long check_$func(void) { return (long) $func; }"
972         done
973         echo "int main(void) { return 0; }"
974     } | check_ld "$@" && enable $funcs && enable_safe $headers
975 }
976
977 check_cpp_condition(){
978     log check_cpp_condition "$@"
979     header=$1
980     condition=$2
981     shift 2
982     check_cpp "$@" <<EOF
983 #include <$header>
984 #if !($condition)
985 #error "unsatisfied condition: $condition"
986 #endif
987 EOF
988 }
989
990 check_lib(){
991     log check_lib "$@"
992     header="$1"
993     func="$2"
994     shift 2
995     check_header $header && check_func $func "$@" && add_extralibs "$@"
996 }
997
998 check_lib2(){
999     log check_lib2 "$@"
1000     headers="$1"
1001     funcs="$2"
1002     shift 2
1003     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1004 }
1005
1006 check_pkg_config(){
1007     log check_pkg_config "$@"
1008     pkg="$1"
1009     headers="$2"
1010     funcs="$3"
1011     shift 3
1012     check_cmd $pkg_config --exists --print-errors $pkg || return
1013     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1014     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1015     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1016         set_safe "${pkg}_cflags" $pkg_cflags   &&
1017         set_safe "${pkg}_libs"   $pkg_libs
1018 }
1019
1020 check_exec(){
1021     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1022 }
1023
1024 check_exec_crash(){
1025     code=$(cat)
1026
1027     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1028     # are safe but may not be available everywhere.  Thus we use
1029     # raise(SIGTERM) instead.  The check is run in a subshell so we
1030     # can redirect the "Terminated" message from the shell.  SIGBUS
1031     # is not defined by standard C so it is used conditionally.
1032
1033     (check_exec "$@") >> $logfile 2>&1 <<EOF
1034 #include <signal.h>
1035 static void sighandler(int sig){
1036     raise(SIGTERM);
1037 }
1038 int foo(void){
1039     $code
1040 }
1041 int (*func_ptr)(void) = foo;
1042 int main(void){
1043     signal(SIGILL, sighandler);
1044     signal(SIGFPE, sighandler);
1045     signal(SIGSEGV, sighandler);
1046 #ifdef SIGBUS
1047     signal(SIGBUS, sighandler);
1048 #endif
1049     return func_ptr();
1050 }
1051 EOF
1052 }
1053
1054 check_type(){
1055     log check_type "$@"
1056     headers=$1
1057     type=$2
1058     shift 2
1059     disable_safe "$type"
1060     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1061 }
1062
1063 check_struct(){
1064     log check_struct "$@"
1065     headers=$1
1066     struct=$2
1067     member=$3
1068     shift 3
1069     disable_safe "${struct}_${member}"
1070     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1071         enable_safe "${struct}_${member}"
1072 }
1073
1074 check_builtin(){
1075     log check_builtin "$@"
1076     name=$1
1077     headers=$2
1078     builtin=$3
1079     shift 3
1080     disable "$name"
1081     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1082 }
1083
1084 check_compile_assert(){
1085     log check_compile_assert "$@"
1086     name=$1
1087     headers=$2
1088     condition=$3
1089     shift 3
1090     disable "$name"
1091     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1092 }
1093
1094 require(){
1095     name="$1"
1096     header="$2"
1097     func="$3"
1098     shift 3
1099     check_lib $header $func "$@" || die "ERROR: $name not found"
1100 }
1101
1102 require2(){
1103     name="$1"
1104     headers="$2"
1105     func="$3"
1106     shift 3
1107     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1108 }
1109
1110 require_pkg_config(){
1111     pkg="$1"
1112     check_pkg_config "$@" || die "ERROR: $pkg not found"
1113     add_cflags    $(get_safe "${pkg}_cflags")
1114     add_extralibs $(get_safe "${pkg}_libs")
1115 }
1116
1117 hostcc_e(){
1118     eval printf '%s\\n' $HOSTCC_E
1119 }
1120
1121 hostcc_o(){
1122     eval printf '%s\\n' $HOSTCC_O
1123 }
1124
1125 check_host_cc(){
1126     log check_host_cc "$@"
1127     cat > $TMPC
1128     log_file $TMPC
1129     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1130 }
1131
1132 check_host_cpp(){
1133     log check_host_cpp "$@"
1134     cat > $TMPC
1135     log_file $TMPC
1136     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1137 }
1138
1139 check_host_cppflags(){
1140     log check_host_cppflags "$@"
1141     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1142 int x;
1143 EOF
1144 }
1145
1146 check_host_cflags(){
1147     log check_host_cflags "$@"
1148     set -- $($host_cflags_filter "$@")
1149     check_host_cc "$@" <<EOF && append host_cflags "$@"
1150 int x;
1151 EOF
1152 }
1153
1154 check_host_cpp_condition(){
1155     log check_host_cpp_condition "$@"
1156     header=$1
1157     condition=$2
1158     shift 2
1159     check_host_cpp "$@" <<EOF
1160 #include <$header>
1161 #if !($condition)
1162 #error "unsatisfied condition: $condition"
1163 #endif
1164 EOF
1165 }
1166
1167 apply(){
1168     file=$1
1169     shift
1170     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1171 }
1172
1173 cp_if_changed(){
1174     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1175     mkdir -p "$(dirname $2)"
1176     $cp_f "$1" "$2"
1177 }
1178
1179 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1180 # system-dependent things.
1181
1182 AVCODEC_COMPONENTS="
1183     bsfs
1184     decoders
1185     encoders
1186     hwaccels
1187     parsers
1188 "
1189
1190 AVDEVICE_COMPONENTS="
1191     indevs
1192     outdevs
1193 "
1194 AVFILTER_COMPONENTS="
1195     filters
1196 "
1197 AVFORMAT_COMPONENTS="
1198     demuxers
1199     muxers
1200     protocols
1201 "
1202
1203 AVRESAMPLE_COMPONENTS=""
1204 AVUTIL_COMPONENTS=""
1205
1206 COMPONENT_LIST="
1207     $AVCODEC_COMPONENTS
1208     $AVDEVICE_COMPONENTS
1209     $AVFILTER_COMPONENTS
1210     $AVFORMAT_COMPONENTS
1211     $AVRESAMPLE_COMPONENTS
1212     $AVUTIL_COMPONENTS
1213 "
1214
1215 EXAMPLE_LIST="
1216     avcodec_example
1217     filter_audio_example
1218     metadata_example
1219     output_example
1220     qsvdec_example
1221     transcode_aac_example
1222 "
1223
1224 EXTERNAL_LIBRARY_LIST="
1225     avisynth
1226     bzlib
1227     frei0r
1228     gnutls
1229     libbs2b
1230     libcdio
1231     libdc1394
1232     libdcadec
1233     libfaac
1234     libfdk_aac
1235     libfontconfig
1236     libfreetype
1237     libgsm
1238     libilbc
1239     libkvazaar
1240     libmp3lame
1241     libnpp
1242     libopencore_amrnb
1243     libopencore_amrwb
1244     libopencv
1245     libopenh264
1246     libopenjpeg
1247     libopus
1248     libpulse
1249     librtmp
1250     libschroedinger
1251     libsnappy
1252     libspeex
1253     libtheora
1254     libtwolame
1255     libvo_aacenc
1256     libvo_amrwbenc
1257     libvorbis
1258     libvpx
1259     libwavpack
1260     libwebp
1261     libx264
1262     libx265
1263     libxavs
1264     libxcb
1265     libxcb_shm
1266     libxcb_xfixes
1267     libxvid
1268     openssl
1269     x11grab
1270     zlib
1271 "
1272
1273 FEATURE_LIST="
1274     gray
1275     hardcoded_tables
1276     omx_rpi
1277     runtime_cpudetect
1278     safe_bitstream_reader
1279     shared
1280     small
1281     sram
1282     static
1283     swscale_alpha
1284 "
1285
1286 HW_CODECS_LIST="
1287     cuda
1288     libmfx
1289     mmal
1290     nvenc
1291     omx
1292 "
1293
1294 HWACCEL_LIST="
1295     d3d11va
1296     dxva2
1297     vaapi
1298     vda
1299     vdpau
1300 "
1301
1302 LIBRARY_LIST="
1303     avcodec
1304     avdevice
1305     avfilter
1306     avformat
1307     avresample
1308     avutil
1309     swscale
1310 "
1311
1312 LICENSE_LIST="
1313     gpl
1314     nonfree
1315     version3
1316 "
1317
1318 PROGRAM_LIST="
1319     avconv
1320     avplay
1321     avprobe
1322 "
1323
1324 SUBSYSTEM_LIST="
1325     dct
1326     doc
1327     error_resilience
1328     faan
1329     fft
1330     lsp
1331     lzo
1332     mdct
1333     network
1334     rdft
1335 "
1336
1337 CONFIG_LIST="
1338     $COMPONENT_LIST
1339     $EXAMPLE_LIST
1340     $EXTERNAL_LIBRARY_LIST
1341     $FEATURE_LIST
1342     $HW_CODECS_LIST
1343     $HWACCEL_LIST
1344     $LICENSE_LIST
1345     $LIBRARY_LIST
1346     $PROGRAM_LIST
1347     $SUBSYSTEM_LIST
1348     memalign_hack
1349     neon_clobber_test
1350     pic
1351     pod2man
1352     texi2html
1353     thumb
1354     valgrind_backtrace
1355     xmm_clobber_test
1356 "
1357
1358 THREADS_LIST="
1359     pthreads
1360     w32threads
1361 "
1362
1363 ATOMICS_LIST="
1364     atomics_gcc
1365     atomics_suncc
1366     atomics_win32
1367 "
1368
1369 ARCH_LIST="
1370     aarch64
1371     alpha
1372     arm
1373     avr32
1374     avr32_ap
1375     avr32_uc
1376     bfin
1377     ia64
1378     m68k
1379     mips
1380     mips64
1381     parisc
1382     ppc
1383     ppc64
1384     s390
1385     sh4
1386     sparc
1387     sparc64
1388     tilegx
1389     tilepro
1390     tomi
1391     x86
1392     x86_32
1393     x86_64
1394 "
1395
1396 ARCH_EXT_LIST_ARM="
1397     armv5te
1398     armv6
1399     armv6t2
1400     armv8
1401     neon
1402     vfp
1403     vfpv3
1404 "
1405
1406 ARCH_EXT_LIST_X86_SIMD="
1407     amd3dnow
1408     amd3dnowext
1409     avx
1410     avx2
1411     fma3
1412     fma4
1413     mmx
1414     mmxext
1415     sse
1416     sse2
1417     sse3
1418     sse4
1419     sse42
1420     ssse3
1421     xop
1422 "
1423
1424 ARCH_EXT_LIST_PPC="
1425     altivec
1426     dcbzl
1427     ldbrx
1428     power8
1429     ppc4xx
1430     vsx
1431 "
1432
1433 ARCH_EXT_LIST_X86="
1434     $ARCH_EXT_LIST_X86_SIMD
1435     cpunop
1436     i686
1437 "
1438
1439 ARCH_EXT_LIST_MIPS="
1440     loongson
1441     mips32r1
1442     mips64r1
1443     mips32r2
1444     mips64r2
1445     mips32r6
1446     mips64r6
1447 "
1448
1449 ARCH_EXT_LIST="
1450     $ARCH_EXT_LIST_ARM
1451     $ARCH_EXT_LIST_MIPS
1452     $ARCH_EXT_LIST_PPC
1453     $ARCH_EXT_LIST_X86
1454     vis
1455 "
1456
1457 ARCH_FEATURES="
1458     aligned_stack
1459     fast_64bit
1460     fast_clz
1461     fast_cmov
1462     local_aligned_8
1463     local_aligned_16
1464     simd_align_16
1465 "
1466
1467 BUILTIN_LIST="
1468     atomic_cas_ptr
1469     machine_rw_barrier
1470     MemoryBarrier
1471     mm_empty
1472     rdtsc
1473     sem_timedwait
1474     sync_val_compare_and_swap
1475 "
1476 HAVE_LIST_CMDLINE="
1477     inline_asm
1478     symver
1479     yasm
1480 "
1481
1482 HAVE_LIST_PUB="
1483     bigendian
1484     fast_unaligned
1485 "
1486
1487 HEADERS_LIST="
1488     AVFoundation_AVFoundation_h
1489     alsa_asoundlib_h
1490     altivec_h
1491     arpa_inet_h
1492     cdio_paranoia_h
1493     cdio_paranoia_paranoia_h
1494     dispatch_dispatch_h
1495     dev_bktr_ioctl_bt848_h
1496     dev_bktr_ioctl_meteor_h
1497     dev_ic_bt8xx_h
1498     dev_video_bktr_ioctl_bt848_h
1499     dev_video_meteor_ioctl_meteor_h
1500     direct_h
1501     dlfcn_h
1502     d3d11_h
1503     dxva_h
1504     gsm_h
1505     io_h
1506     mach_mach_time_h
1507     machine_ioctl_bt848_h
1508     machine_ioctl_meteor_h
1509     malloc_h
1510     poll_h
1511     sndio_h
1512     soundcard_h
1513     sys_mman_h
1514     sys_param_h
1515     sys_resource_h
1516     sys_select_h
1517     sys_soundcard_h
1518     sys_time_h
1519     sys_un_h
1520     sys_videoio_h
1521     unistd_h
1522     valgrind_valgrind_h
1523     windows_h
1524     winsock2_h
1525 "
1526
1527 INTRINSICS_LIST="
1528     intrinsics_neon
1529 "
1530
1531 MATH_FUNCS="
1532     atanf
1533     atan2f
1534     cbrtf
1535     cosf
1536     exp2
1537     exp2f
1538     expf
1539     isinf
1540     isnan
1541     ldexpf
1542     llrint
1543     llrintf
1544     log2
1545     log2f
1546     log10f
1547     lrint
1548     lrintf
1549     powf
1550     rint
1551     round
1552     roundf
1553     sinf
1554     trunc
1555     truncf
1556 "
1557
1558 SYSTEM_FUNCS="
1559     aligned_malloc
1560     clock_gettime
1561     closesocket
1562     CommandLineToArgvW
1563     CoTaskMemFree
1564     CryptGenRandom
1565     dlopen
1566     fcntl
1567     flt_lim
1568     fork
1569     getaddrinfo
1570     gethrtime
1571     getopt
1572     GetProcessAffinityMask
1573     GetProcessMemoryInfo
1574     GetProcessTimes
1575     getrusage
1576     GetSystemTimeAsFileTime
1577     gettimeofday
1578     gmtime_r
1579     inet_aton
1580     isatty
1581     jack_port_get_latency_range
1582     LoadLibrary
1583     localtime_r
1584     mach_absolute_time
1585     MapViewOfFile
1586     memalign
1587     mkstemp
1588     mmap
1589     mprotect
1590     nanosleep
1591     posix_memalign
1592     sched_getaffinity
1593     SetConsoleTextAttribute
1594     setmode
1595     setrlimit
1596     Sleep
1597     strerror_r
1598     sysconf
1599     sysctl
1600     usleep
1601     VirtualAlloc
1602 "
1603
1604 TOOLCHAIN_FEATURES="
1605     as_dn_directive
1606     as_func
1607     as_object_arch
1608     asm_mod_q
1609     attribute_may_alias
1610     attribute_packed
1611     ebp_available
1612     ebx_available
1613     gnu_as
1614     ibm_asm
1615     inline_asm_labels
1616     pragma_deprecated
1617     symver_asm_label
1618     symver_gnu_asm
1619     vfp_args
1620     xform_asm
1621     xmm_clobbers
1622 "
1623
1624 TYPES_LIST="
1625     CONDITION_VARIABLE_Ptr
1626     socklen_t
1627     struct_addrinfo
1628     struct_group_source_req
1629     struct_ip_mreq_source
1630     struct_ipv6_mreq
1631     struct_pollfd
1632     struct_rusage_ru_maxrss
1633     struct_sockaddr_in6
1634     struct_sockaddr_sa_len
1635     struct_sockaddr_storage
1636     struct_v4l2_frmivalenum_discrete
1637 "
1638
1639 HAVE_LIST="
1640     $ARCH_EXT_LIST
1641     $(add_suffix _external $ARCH_EXT_LIST)
1642     $(add_suffix _inline   $ARCH_EXT_LIST)
1643     $ARCH_FEATURES
1644     $ATOMICS_LIST
1645     $BUILTIN_LIST
1646     $HAVE_LIST_CMDLINE
1647     $HAVE_LIST_PUB
1648     $HEADERS_LIST
1649     $INTRINSICS_LIST
1650     $MATH_FUNCS
1651     $SYSTEM_FUNCS
1652     $THREADS_LIST
1653     $TOOLCHAIN_FEATURES
1654     $TYPES_LIST
1655     atomics_native
1656     dos_paths
1657     dxva2_lib
1658     libc_msvcrt
1659     libdc1394_1
1660     libdc1394_2
1661     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1662     sdl
1663     section_data_rel_ro
1664     threads
1665     vaapi_drm
1666     vaapi_x11
1667     vdpau_x11
1668     xlib
1669 "
1670
1671 # options emitted with CONFIG_ prefix but not available on the command line
1672 CONFIG_EXTRA="
1673     aandcttables
1674     ac3dsp
1675     audio_frame_queue
1676     audiodsp
1677     blockdsp
1678     bswapdsp
1679     cabac
1680     dirac_parse
1681     dvprofile
1682     faandct
1683     faanidct
1684     fdctdsp
1685     flacdsp
1686     fmtconvert
1687     g722dsp
1688     gcrypt
1689     gmp
1690     golomb
1691     gplv3
1692     h263dsp
1693     h264chroma
1694     h264dsp
1695     h264pred
1696     h264qpel
1697     hpeldsp
1698     huffman
1699     huffyuvdsp
1700     huffyuvencdsp
1701     idctdsp
1702     iirfilter
1703     imdct15
1704     intrax8
1705     iso_media
1706     ividsp
1707     jpegtables
1708     libx262
1709     lgplv3
1710     lpc
1711     lzf
1712     me_cmp
1713     mpeg_er
1714     mpegaudio
1715     mpegaudiodsp
1716     mpegvideo
1717     mpegvideoenc
1718     mss34dsp
1719     pixblockdsp
1720     qpeldsp
1721     qsv
1722     qsvdec
1723     qsvenc
1724     rangecoder
1725     riffdec
1726     riffenc
1727     rtpdec
1728     rtpenc_chain
1729     rv34dsp
1730     sinewin
1731     snappy
1732     srtp
1733     startcode
1734     texturedsp
1735     texturedspenc
1736     tpeldsp
1737     vaapi_encode
1738     vc1dsp
1739     videodsp
1740     vp3dsp
1741     vp56dsp
1742     vp8dsp
1743     wma_freqs
1744     wmv2dsp
1745 "
1746
1747 CMDLINE_SELECT="
1748     $ARCH_EXT_LIST
1749     $CONFIG_LIST
1750     $HAVE_LIST_CMDLINE
1751     $THREADS_LIST
1752     asm
1753     cross_compile
1754     debug
1755     extra_warnings
1756     logging
1757     lto
1758     optimizations
1759     rpath
1760 "
1761
1762 PATHS_LIST="
1763     bindir
1764     datadir
1765     docdir
1766     incdir
1767     libdir
1768     mandir
1769     prefix
1770     shlibdir
1771 "
1772
1773 CMDLINE_SET="
1774     $PATHS_LIST
1775     ar
1776     arch
1777     as
1778     build_suffix
1779     cc
1780     objcc
1781     cpu
1782     cross_prefix
1783     custom_allocator
1784     dep_cc
1785     env
1786     extra_version
1787     host_cc
1788     host_cflags
1789     host_ld
1790     host_ldflags
1791     host_libs
1792     host_os
1793     ld
1794     logfile
1795     malloc_prefix
1796     nm
1797     optflags
1798     pkg_config
1799     pkg_config_flags
1800     random_seed
1801     samples
1802     sysinclude
1803     sysroot
1804     target_exec
1805     target_os
1806     target_path
1807     target_samples
1808     toolchain
1809 "
1810
1811 CMDLINE_APPEND="
1812     extra_cflags
1813     extra_objcflags
1814     host_cppflags
1815 "
1816
1817 # code dependency declarations
1818
1819 # architecture extensions
1820
1821 armv5te_deps="arm"
1822 armv6_deps="arm"
1823 armv6t2_deps="arm"
1824 armv8_deps="aarch64"
1825 neon_deps_any="aarch64 arm"
1826 intrinsics_neon_deps="neon"
1827 vfp_deps_any="aarch64 arm"
1828 vfpv3_deps="vfp"
1829
1830 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1831
1832 altivec_deps="ppc"
1833 ppc4xx_deps="ppc"
1834 vsx_deps="altivec"
1835 power8_deps="vsx"
1836
1837 cpunop_deps="i686"
1838 x86_64_select="i686"
1839 x86_64_suggest="fast_cmov"
1840
1841 amd3dnow_deps="mmx"
1842 amd3dnowext_deps="amd3dnow"
1843 i686_deps="x86"
1844 mmx_deps="x86"
1845 mmxext_deps="mmx"
1846 sse_deps="mmxext"
1847 sse2_deps="sse"
1848 sse3_deps="sse2"
1849 ssse3_deps="sse3"
1850 sse4_deps="ssse3"
1851 sse42_deps="sse4"
1852 avx_deps="sse42"
1853 xop_deps="avx"
1854 fma3_deps="avx"
1855 fma4_deps="avx"
1856 avx2_deps="avx"
1857
1858 mmx_external_deps="yasm"
1859 mmx_inline_deps="inline_asm"
1860 mmx_suggest="mmx_external mmx_inline"
1861
1862 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1863     eval dep=\$${ext}_deps
1864     eval ${ext}_external_deps='"${dep}_external"'
1865     eval ${ext}_inline_deps='"${dep}_inline"'
1866     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1867 done
1868
1869 aligned_stack_if_any="aarch64 ppc x86"
1870 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1871 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1872 fast_unaligned_if_any="aarch64 ppc x86"
1873 simd_align_16_if_any="altivec neon sse"
1874
1875 # system capabilities
1876 symver_if_any="symver_asm_label symver_gnu_asm"
1877 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1878
1879 # threading support
1880 atomics_gcc_if="sync_val_compare_and_swap"
1881 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1882 atomics_win32_if="MemoryBarrier"
1883 atomics_native_if_any="$ATOMICS_LIST"
1884 w32threads_deps="atomics_native"
1885 threads_if_any="$THREADS_LIST"
1886
1887 # subsystems
1888 dct_select="rdft"
1889 dirac_parse_select="golomb"
1890 error_resilience_select="me_cmp"
1891 faandct_deps="faan fdctdsp"
1892 faanidct_deps="faan idctdsp"
1893 h264dsp_select="startcode"
1894 intrax8_select="blockdsp idctdsp"
1895 mdct_select="fft"
1896 rdft_select="fft"
1897 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1898 mpeg_er_select="error_resilience"
1899 mpegaudio_select="mpegaudiodsp"
1900 mpegaudiodsp_select="dct"
1901 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1902 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1903 vc1dsp_select="h264chroma qpeldsp startcode"
1904
1905 # decoders / encoders
1906 aac_decoder_select="imdct15 mdct sinewin"
1907 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1908 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1909 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1910 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1911 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1912 adpcm_g722_decoder_select="g722dsp"
1913 adpcm_g722_encoder_select="g722dsp"
1914 aic_decoder_select="golomb idctdsp"
1915 alac_encoder_select="lpc"
1916 als_decoder_select="bswapdsp"
1917 amrnb_decoder_select="lsp"
1918 amrwb_decoder_select="lsp"
1919 amv_decoder_select="sp5x_decoder"
1920 ape_decoder_select="bswapdsp"
1921 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1922 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1923 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1924 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1925 atrac1_decoder_select="mdct sinewin"
1926 atrac3_decoder_select="mdct"
1927 atrac3p_decoder_select="mdct sinewin"
1928 bink_decoder_select="blockdsp hpeldsp"
1929 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1930 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1931 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1932 cllc_decoder_select="bswapdsp"
1933 comfortnoise_encoder_select="lpc"
1934 cook_decoder_select="audiodsp mdct sinewin"
1935 cscd_decoder_select="lzo"
1936 cscd_decoder_suggest="zlib"
1937 dca_decoder_select="fmtconvert mdct"
1938 dds_decoder_select="texturedsp"
1939 dnxhd_decoder_select="blockdsp idctdsp"
1940 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1941 dvvideo_decoder_select="dvprofile idctdsp"
1942 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1943 dxa_decoder_deps="zlib"
1944 dxv_decoder_select="lzf texturedsp"
1945 eac3_decoder_select="ac3_decoder"
1946 eac3_encoder_select="ac3_encoder"
1947 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1948 eatgq_decoder_select="aandcttables idctdsp"
1949 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1950 exr_decoder_deps="zlib"
1951 ffv1_decoder_select="golomb rangecoder"
1952 ffv1_encoder_select="rangecoder"
1953 ffvhuff_decoder_select="huffyuv_decoder"
1954 ffvhuff_encoder_select="huffyuv_encoder"
1955 fic_decoder_select="golomb"
1956 flac_decoder_select="flacdsp golomb"
1957 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1958 flashsv_decoder_deps="zlib"
1959 flashsv_encoder_deps="zlib"
1960 flashsv2_decoder_deps="zlib"
1961 flv_decoder_select="h263_decoder"
1962 flv_encoder_select="h263_encoder"
1963 fourxm_decoder_select="blockdsp bswapdsp"
1964 fraps_decoder_select="bswapdsp huffman"
1965 g2m_decoder_deps="zlib"
1966 g2m_decoder_select="blockdsp idctdsp jpegtables"
1967 h261_decoder_select="mpeg_er mpegvideo"
1968 h261_encoder_select="aandcttables mpegvideoenc"
1969 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1970 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1971 h263i_decoder_select="h263_decoder"
1972 h263p_encoder_select="h263_encoder"
1973 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
1974 h264_decoder_suggest="error_resilience"
1975 hap_decoder_select="snappy texturedsp"
1976 hap_encoder_deps="libsnappy"
1977 hap_encoder_select="texturedspenc"
1978 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1979 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1980 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1981 iac_decoder_select="imc_decoder"
1982 imc_decoder_select="bswapdsp fft mdct sinewin"
1983 indeo3_decoder_select="hpeldsp"
1984 indeo4_decoder_select="ividsp"
1985 indeo5_decoder_select="ividsp"
1986 interplay_video_decoder_select="hpeldsp"
1987 jpegls_decoder_select="golomb mjpeg_decoder"
1988 jpegls_encoder_select="golomb"
1989 jv_decoder_select="blockdsp"
1990 lagarith_decoder_select="huffyuvdsp"
1991 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1992 loco_decoder_select="golomb"
1993 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1994 metasound_decoder_select="lsp mdct sinewin"
1995 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1996 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1997 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1998 mjpegb_decoder_select="mjpeg_decoder"
1999 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2000 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2001 mlp_decoder_select="mlp_parser"
2002 motionpixels_decoder_select="bswapdsp"
2003 mp1_decoder_select="mpegaudio"
2004 mp1float_decoder_select="mpegaudio"
2005 mp2_decoder_select="mpegaudio"
2006 mp2float_decoder_select="mpegaudio"
2007 mp3_decoder_select="mpegaudio"
2008 mp3adu_decoder_select="mpegaudio"
2009 mp3adufloat_decoder_select="mpegaudio"
2010 mp3float_decoder_select="mpegaudio"
2011 mp3on4_decoder_select="mpegaudio"
2012 mp3on4float_decoder_select="mpegaudio"
2013 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2014 mpc8_decoder_select="mpegaudiodsp"
2015 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2016 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2017 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2018 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2019 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2020 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2021 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2022 mpeg4_encoder_select="h263_encoder"
2023 msa1_decoder_select="mss34dsp"
2024 msmpeg4v1_decoder_select="h263_decoder"
2025 msmpeg4v2_decoder_select="h263_decoder"
2026 msmpeg4v2_encoder_select="h263_encoder"
2027 msmpeg4v3_decoder_select="h263_decoder"
2028 msmpeg4v3_encoder_select="h263_encoder"
2029 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2030 mts2_decoder_select="mss34dsp"
2031 mxpeg_decoder_select="mjpeg_decoder"
2032 nellymoser_decoder_select="mdct sinewin"
2033 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2034 nuv_decoder_select="idctdsp lzo"
2035 on2avc_decoder_select="mdct"
2036 opus_decoder_deps="avresample"
2037 opus_decoder_select="imdct15"
2038 png_decoder_deps="zlib"
2039 png_encoder_deps="zlib"
2040 png_encoder_select="huffyuvencdsp"
2041 prores_decoder_select="idctdsp"
2042 prores_encoder_select="fdctdsp"
2043 qcelp_decoder_select="lsp"
2044 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2045 ra_144_encoder_select="audio_frame_queue lpc"
2046 ralf_decoder_select="golomb"
2047 rscc_decoder_deps="zlib"
2048 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2049 rv10_encoder_select="h263_encoder"
2050 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2051 rv20_encoder_select="h263_encoder"
2052 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2053 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2054 screenpresso_decoder_deps="zlib"
2055 shorten_decoder_select="golomb"
2056 sipr_decoder_select="lsp"
2057 sp5x_decoder_select="mjpeg_decoder"
2058 svq1_decoder_select="hpeldsp"
2059 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2060 svq3_decoder_select="golomb h264dsp h264pred hpeldsp tpeldsp videodsp"
2061 svq3_decoder_suggest="zlib"
2062 tak_decoder_select="audiodsp"
2063 tdsc_decoder_deps="zlib"
2064 tdsc_decoder_select="mjpeg_decoder"
2065 theora_decoder_select="vp3_decoder"
2066 thp_decoder_select="mjpeg_decoder"
2067 tiff_decoder_suggest="zlib"
2068 tiff_encoder_suggest="zlib"
2069 truehd_decoder_select="mlp_decoder"
2070 truemotion2_decoder_select="bswapdsp"
2071 truespeech_decoder_select="bswapdsp"
2072 tscc_decoder_deps="zlib"
2073 txd_decoder_select="texturedsp"
2074 twinvq_decoder_select="mdct lsp sinewin"
2075 utvideo_decoder_select="bswapdsp"
2076 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2077 vble_decoder_select="huffyuvdsp"
2078 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2079 vc1image_decoder_select="vc1_decoder"
2080 vorbis_decoder_select="mdct"
2081 vorbis_encoder_select="mdct"
2082 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2083 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2084 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2085 vp6a_decoder_select="vp6_decoder"
2086 vp6f_decoder_select="vp6_decoder"
2087 vp7_decoder_select="h264pred videodsp vp8dsp"
2088 vp8_decoder_select="h264pred videodsp vp8dsp"
2089 vp9_decoder_select="videodsp"
2090 webp_decoder_select="vp8_decoder"
2091 wmapro_decoder_select="mdct sinewin wma_freqs"
2092 wmav1_decoder_select="mdct sinewin wma_freqs"
2093 wmav1_encoder_select="mdct sinewin wma_freqs"
2094 wmav2_decoder_select="mdct sinewin wma_freqs"
2095 wmav2_encoder_select="mdct sinewin wma_freqs"
2096 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2097 wmv1_decoder_select="h263_decoder"
2098 wmv1_encoder_select="h263_encoder"
2099 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2100 wmv2_encoder_select="h263_encoder wmv2dsp"
2101 wmv3_decoder_select="vc1_decoder"
2102 wmv3image_decoder_select="wmv3_decoder"
2103 zerocodec_decoder_deps="zlib"
2104 zlib_decoder_deps="zlib"
2105 zlib_encoder_deps="zlib"
2106 zmbv_decoder_deps="zlib"
2107 zmbv_encoder_deps="zlib"
2108
2109 # hardware accelerators
2110 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2111 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2112 vaapi_deps="va_va_h"
2113 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2114 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2115 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2116
2117 h263_vaapi_hwaccel_deps="vaapi"
2118 h263_vaapi_hwaccel_select="h263_decoder"
2119 h264_d3d11va_hwaccel_deps="d3d11va"
2120 h264_d3d11va_hwaccel_select="h264_decoder"
2121 h264_dxva2_hwaccel_deps="dxva2"
2122 h264_dxva2_hwaccel_select="h264_decoder"
2123 h264_mmal_decoder_deps="mmal"
2124 h264_mmal_decoder_select="mmal"
2125 h264_mmal_hwaccel_deps="mmal"
2126 h264_omx_encoder_deps="omx"
2127 h264_qsv_hwaccel_deps="libmfx"
2128 h264_vaapi_hwaccel_deps="vaapi"
2129 h264_vaapi_hwaccel_select="h264_decoder"
2130 h264_vda_hwaccel_deps="vda"
2131 h264_vda_hwaccel_select="h264_decoder"
2132 h264_vda_old_hwaccel_deps="vda"
2133 h264_vda_old_hwaccel_select="h264_decoder"
2134 h264_vdpau_hwaccel_deps="vdpau"
2135 h264_vdpau_hwaccel_select="h264_decoder"
2136 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2137 hevc_d3d11va_hwaccel_select="hevc_decoder"
2138 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2139 hevc_dxva2_hwaccel_select="hevc_decoder"
2140 hevc_qsv_hwaccel_deps="libmfx"
2141 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2142 hevc_vdpau_hwaccel_select="hevc_decoder"
2143 mpeg1_vdpau_hwaccel_deps="vdpau"
2144 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2145 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2146 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2147 mpeg2_dxva2_hwaccel_deps="dxva2"
2148 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2149 mpeg2_mmal_decoder_deps="mmal"
2150 mpeg2_mmal_decoder_select="mmal"
2151 mpeg2_mmal_hwaccel_deps="mmal"
2152 mpeg2_qsv_hwaccel_deps="libmfx"
2153 mpeg2_vaapi_hwaccel_deps="vaapi"
2154 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2155 mpeg2_vdpau_hwaccel_deps="vdpau"
2156 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2157 mpeg4_omx_encoder_deps="omx"
2158 mpeg4_vaapi_hwaccel_deps="vaapi"
2159 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2160 mpeg4_vdpau_hwaccel_deps="vdpau"
2161 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2162 vc1_d3d11va_hwaccel_deps="d3d11va"
2163 vc1_d3d11va_hwaccel_select="vc1_decoder"
2164 vc1_dxva2_hwaccel_deps="dxva2"
2165 vc1_dxva2_hwaccel_select="vc1_decoder"
2166 vc1_mmal_decoder_deps="mmal"
2167 vc1_mmal_decoder_select="mmal"
2168 vc1_mmal_hwaccel_deps="mmal"
2169 vc1_vaapi_hwaccel_deps="vaapi"
2170 vc1_vaapi_hwaccel_select="vc1_decoder"
2171 vc1_vdpau_hwaccel_deps="vdpau"
2172 vc1_vdpau_hwaccel_select="vc1_decoder"
2173 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2174 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2175 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2176 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2177
2178 # hardware-accelerated codecs
2179 nvenc_deps_any="dlopen LoadLibrary"
2180 nvenc_extralibs='$ldl'
2181 omx_deps="dlopen pthreads"
2182 omx_extralibs='$ldl'
2183 qsvdec_select="qsv"
2184 qsvenc_select="qsv"
2185 vaapi_encode_deps="vaapi"
2186
2187 hwupload_cuda_filter_deps="cuda"
2188 scale_npp_filter_deps="cuda libnpp"
2189
2190 h264_nvenc_encoder_deps="nvenc"
2191 h264_qsv_decoder_deps="libmfx"
2192 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2193 h264_qsv_encoder_deps="libmfx"
2194 h264_qsv_encoder_select="qsvenc"
2195 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2196 h264_vaapi_encoder_select="vaapi_encode golomb"
2197
2198 hevc_nvenc_encoder_deps="nvenc"
2199 hevc_qsv_decoder_deps="libmfx"
2200 hevc_qsv_encoder_deps="libmfx"
2201 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2202 hevc_qsv_encoder_select="qsvenc"
2203 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2204 hevc_vaapi_encoder_select="vaapi_encode golomb"
2205 mpeg2_qsv_decoder_deps="libmfx"
2206 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2207 mpeg2_qsv_encoder_deps="libmfx"
2208 mpeg2_qsv_encoder_select="qsvenc"
2209
2210 nvenc_h264_encoder_deps="nvenc"
2211 nvenc_hevc_encoder_deps="nvenc"
2212
2213 # parsers
2214 h264_parser_select="golomb h264dsp"
2215 hevc_parser_select="golomb"
2216 mpegvideo_parser_select="mpegvideo"
2217 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2218 vc1_parser_select="vc1dsp"
2219
2220 # bitstream_filters
2221 mjpeg2jpeg_bsf_select="jpegtables"
2222
2223 # external libraries
2224 libdcadec_decoder_deps="libdcadec"
2225 libfaac_encoder_deps="libfaac"
2226 libfaac_encoder_select="audio_frame_queue"
2227 libfdk_aac_decoder_deps="libfdk_aac"
2228 libfdk_aac_encoder_deps="libfdk_aac"
2229 libfdk_aac_encoder_select="audio_frame_queue"
2230 libgsm_decoder_deps="libgsm"
2231 libgsm_encoder_deps="libgsm"
2232 libgsm_ms_decoder_deps="libgsm"
2233 libgsm_ms_encoder_deps="libgsm"
2234 libilbc_decoder_deps="libilbc"
2235 libilbc_encoder_deps="libilbc"
2236 libkvazaar_encoder_deps="libkvazaar"
2237 libmp3lame_encoder_deps="libmp3lame"
2238 libmp3lame_encoder_select="audio_frame_queue"
2239 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2240 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2241 libopencore_amrnb_encoder_select="audio_frame_queue"
2242 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2243 libopenh264_encoder_deps="libopenh264"
2244 libopenjpeg_decoder_deps="libopenjpeg"
2245 libopenjpeg_encoder_deps="libopenjpeg"
2246 libopus_decoder_deps="libopus"
2247 libopus_encoder_deps="libopus"
2248 libopus_encoder_select="audio_frame_queue"
2249 libschroedinger_decoder_deps="libschroedinger"
2250 libschroedinger_encoder_deps="libschroedinger"
2251 libspeex_decoder_deps="libspeex"
2252 libspeex_encoder_deps="libspeex"
2253 libspeex_encoder_select="audio_frame_queue"
2254 libtheora_encoder_deps="libtheora"
2255 libtwolame_encoder_deps="libtwolame"
2256 libvo_aacenc_encoder_deps="libvo_aacenc"
2257 libvo_aacenc_encoder_select="audio_frame_queue"
2258 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2259 libvorbis_encoder_deps="libvorbis"
2260 libvorbis_encoder_select="audio_frame_queue"
2261 libvpx_vp8_decoder_deps="libvpx"
2262 libvpx_vp8_encoder_deps="libvpx"
2263 libvpx_vp9_decoder_deps="libvpx"
2264 libvpx_vp9_encoder_deps="libvpx"
2265 libwavpack_encoder_deps="libwavpack"
2266 libwebp_encoder_deps="libwebp"
2267 libx262_encoder_deps="libx262"
2268 libx264_encoder_deps="libx264"
2269 libx265_encoder_deps="libx265"
2270 libxavs_encoder_deps="libxavs"
2271 libxvid_encoder_deps="libxvid"
2272
2273 # demuxers / muxers
2274 ac3_demuxer_select="ac3_parser"
2275 asf_demuxer_select="riffdec"
2276 asf_muxer_select="riffenc"
2277 asf_stream_muxer_select="asf_muxer"
2278 avi_demuxer_select="iso_media riffdec"
2279 avi_muxer_select="riffenc"
2280 avisynth_demuxer_deps="avisynth"
2281 avisynth_demuxer_select="riffdec"
2282 caf_demuxer_select="iso_media riffdec"
2283 dash_muxer_select="mp4_muxer"
2284 dirac_demuxer_select="dirac_parser"
2285 dv_demuxer_select="dvprofile"
2286 dv_muxer_select="dvprofile"
2287 dxa_demuxer_select="riffdec"
2288 eac3_demuxer_select="ac3_parser"
2289 f4v_muxer_select="mov_muxer"
2290 flac_demuxer_select="flac_parser"
2291 hds_muxer_select="flv_muxer"
2292 hls_muxer_select="mpegts_muxer"
2293 ipod_muxer_select="mov_muxer"
2294 ismv_muxer_select="mov_muxer"
2295 matroska_audio_muxer_select="matroska_muxer"
2296 matroska_demuxer_select="iso_media riffdec"
2297 matroska_demuxer_suggest="bzlib lzo zlib"
2298 matroska_muxer_select="iso_media riffenc"
2299 mmf_muxer_select="riffenc"
2300 mov_demuxer_select="iso_media riffdec"
2301 mov_demuxer_suggest="zlib"
2302 mov_muxer_select="iso_media riffenc rtpenc_chain"
2303 mp3_demuxer_select="mpegaudio_parser"
2304 mp4_muxer_select="mov_muxer"
2305 mpegts_demuxer_select="iso_media"
2306 mpegts_muxer_select="adts_muxer latm_muxer"
2307 mpegtsraw_demuxer_select="mpegts_demuxer"
2308 mxf_d10_muxer_select="mxf_muxer"
2309 nut_muxer_select="riffenc"
2310 nuv_demuxer_select="riffdec"
2311 oga_muxer_select="ogg_muxer"
2312 ogg_demuxer_select="dirac_parse"
2313 opus_muxer_select="ogg_muxer"
2314 psp_muxer_select="mov_muxer"
2315 rtp_demuxer_select="sdp_demuxer"
2316 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2317 rtsp_demuxer_select="http_protocol rtpdec"
2318 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2319 sap_demuxer_select="sdp_demuxer"
2320 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2321 sdp_demuxer_select="rtpdec"
2322 smoothstreaming_muxer_select="ismv_muxer"
2323 spdif_muxer_select="aac_parser"
2324 spx_muxer_select="ogg_muxer"
2325 swf_demuxer_suggest="zlib"
2326 tak_demuxer_select="tak_parser"
2327 tg2_muxer_select="mov_muxer"
2328 tgp_muxer_select="mov_muxer"
2329 w64_demuxer_select="wav_demuxer"
2330 wav_demuxer_select="riffdec"
2331 wav_muxer_select="riffenc"
2332 webm_muxer_select="iso_media riffenc"
2333 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2334 wtv_demuxer_select="mpegts_demuxer riffdec"
2335 xmv_demuxer_select="riffdec"
2336 xwma_demuxer_select="riffdec"
2337
2338 # indevs / outdevs
2339 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2340 alsa_outdev_deps="alsa_asoundlib_h"
2341 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2342 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2343 dv1394_indev_deps="dv1394"
2344 dv1394_indev_select="dv_demuxer"
2345 fbdev_indev_deps="linux_fb_h"
2346 jack_indev_deps="jack_jack_h"
2347 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2348 libcdio_indev_deps="libcdio"
2349 libdc1394_indev_deps="libdc1394"
2350 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2351 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2352 pulse_indev_deps="libpulse"
2353 sndio_indev_deps="sndio_h"
2354 sndio_outdev_deps="sndio_h"
2355 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2356 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2357 vfwcap_indev_extralibs="-lavicap32"
2358 x11grab_indev_deps="x11grab"
2359 x11grab_xcb_indev_deps="libxcb"
2360
2361 # protocols
2362 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2363 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2364 ffrtmpcrypt_protocol_select="tcp_protocol"
2365 ffrtmphttp_protocol_deps="!librtmp_protocol"
2366 ffrtmphttp_protocol_select="http_protocol"
2367 gopher_protocol_select="network"
2368 http_protocol_select="tcp_protocol"
2369 httpproxy_protocol_select="tcp_protocol"
2370 https_protocol_select="tls_protocol"
2371 icecast_protocol_select="http_protocol"
2372 librtmp_protocol_deps="librtmp"
2373 librtmpe_protocol_deps="librtmp"
2374 librtmps_protocol_deps="librtmp"
2375 librtmpt_protocol_deps="librtmp"
2376 librtmpte_protocol_deps="librtmp"
2377 mmsh_protocol_select="http_protocol"
2378 mmst_protocol_select="network"
2379 rtmp_protocol_deps="!librtmp_protocol"
2380 rtmp_protocol_select="tcp_protocol"
2381 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2382 rtmps_protocol_deps="!librtmp_protocol"
2383 rtmps_protocol_select="tls_protocol"
2384 rtmpt_protocol_select="ffrtmphttp_protocol"
2385 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2386 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2387 rtp_protocol_select="udp_protocol"
2388 sctp_protocol_deps="struct_sctp_event_subscribe"
2389 sctp_protocol_select="network"
2390 srtp_protocol_select="rtp_protocol srtp"
2391 tcp_protocol_select="network"
2392 tls_gnutls_protocol_deps="gnutls"
2393 tls_gnutls_protocol_select="tcp_protocol"
2394 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2395 tls_openssl_protocol_select="tcp_protocol"
2396 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2397 udp_protocol_select="network"
2398 unix_protocol_deps="sys_un_h"
2399 unix_protocol_select="network"
2400
2401 # filters
2402 blackframe_filter_deps="gpl"
2403 boxblur_filter_deps="gpl"
2404 bs2b_filter_deps="libbs2b"
2405 cropdetect_filter_deps="gpl"
2406 delogo_filter_deps="gpl"
2407 drawtext_filter_deps="libfreetype"
2408 frei0r_filter_deps="frei0r dlopen"
2409 frei0r_filter_extralibs='$ldl'
2410 frei0r_src_filter_deps="frei0r dlopen"
2411 frei0r_src_filter_extralibs='$ldl'
2412 hqdn3d_filter_deps="gpl"
2413 interlace_filter_deps="gpl"
2414 ocv_filter_deps="libopencv"
2415 resample_filter_deps="avresample"
2416 scale_filter_deps="swscale"
2417 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2418
2419 # examples
2420 avcodec_example_deps="avcodec avutil"
2421 filter_audio_example_deps="avfilter avutil"
2422 metadata_example_deps="avformat avutil"
2423 output_example_deps="avcodec avformat avutil swscale"
2424 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2425 transcode_aac_example_deps="avcodec avformat avresample"
2426
2427 # libraries, in linking order
2428 avcodec_deps="avutil"
2429 avdevice_deps="avformat avcodec avutil"
2430 avfilter_deps="avutil"
2431 avformat_deps="avcodec avutil"
2432 avresample_deps="avutil"
2433 swscale_deps="avutil"
2434
2435 # programs
2436 avconv_deps="avcodec avfilter avformat avresample swscale"
2437 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2438                fps_filter null_filter resample_filter scale_filter
2439                setpts_filter trim_filter"
2440 avplay_deps="avcodec avfilter avformat avresample sdl"
2441 avplay_libs='$sdl_libs'
2442 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2443 avprobe_deps="avcodec avformat"
2444
2445 # documentation
2446 pod2man_deps="doc"
2447 texi2html_deps="doc"
2448
2449 # default parameters
2450
2451 logfile="config.log"
2452
2453 # installation paths
2454 prefix_default="/usr/local"
2455 bindir_default='${prefix}/bin'
2456 datadir_default='${prefix}/share/avconv'
2457 docdir_default='${prefix}/share/doc/libav'
2458 incdir_default='${prefix}/include'
2459 libdir_default='${prefix}/lib'
2460 mandir_default='${prefix}/share/man'
2461 shlibdir_default="$libdir_default"
2462
2463 # toolchain
2464 ar_default="ar"
2465 cc_default="gcc"
2466 host_cc_default="gcc"
2467 cp_f="cp -f"
2468 ln_s="ln -s -f"
2469 nm_default="nm -g"
2470 objformat="elf"
2471 pkg_config_default=pkg-config
2472 ranlib="ranlib"
2473 strip="strip"
2474 yasmexe="yasm"
2475
2476 # machine
2477 arch_default=$(uname -m)
2478 cpu="generic"
2479 intrinsics="none"
2480
2481 # OS
2482 target_os_default=$(tolower $(uname -s))
2483 host_os=$target_os_default
2484
2485 # configurable options
2486 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2487
2488 enable asm
2489 enable debug
2490 enable doc
2491 enable faan faandct faanidct
2492 enable optimizations
2493 enable safe_bitstream_reader
2494 enable static
2495 enable swscale_alpha
2496 enable valgrind_backtrace
2497
2498 # By default, enable only those hwaccels that have no external dependencies.
2499 enable d3d11va dxva2 vda vdpau
2500
2501 # build settings
2502 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2503 LIBPREF="lib"
2504 LIBSUF=".a"
2505 FULLNAME='$(NAME)$(BUILDSUF)'
2506 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2507 SLIBPREF="lib"
2508 SLIBSUF=".so"
2509 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2510 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2511 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2512 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2513 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2514 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2515
2516 asflags_filter=echo
2517 cflags_filter=echo
2518 ldflags_filter=echo
2519
2520 AS_C='-c'
2521 AS_O='-o $@'
2522 CC_C='-c'
2523 CC_E='-E -o $@'
2524 CC_O='-o $@'
2525 OBJCC_C='-c'
2526 OBJCC_E='-E -o $@'
2527 OBJCC_O='-o $@'
2528 LD_O='-o $@'
2529 LD_LIB='-l%'
2530 LD_PATH='-L'
2531 HOSTCC_C='-c'
2532 HOSTCC_E='-E -o $@'
2533 HOSTCC_O='-o $@'
2534 HOSTLD_O='-o $@'
2535
2536 host_libs='-lm'
2537 host_cflags_filter=echo
2538 host_ldflags_filter=echo
2539
2540 target_path='$(CURDIR)'
2541
2542 # since the object filename is not given with the -MM flag, the compiler
2543 # is only able to print the basename, and we must add the path ourselves
2544 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2545 DEPFLAGS='-MM'
2546
2547 # find source path
2548 if test -f configure; then
2549     source_path=.
2550 else
2551     source_path=$(cd $(dirname "$0"); pwd)
2552     echo "$source_path" | grep -q '[[:blank:]]' &&
2553         die "Out of tree builds are impossible with whitespace in source path."
2554     test -e "$source_path/config.h" &&
2555         die "Out of tree builds are impossible with config.h in source dir."
2556 fi
2557
2558 for v in "$@"; do
2559     r=${v#*=}
2560     l=${v%"$r"}
2561     r=$(sh_quote "$r")
2562     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2563 done
2564
2565 find_things(){
2566     thing=$1
2567     pattern=$2
2568     file=$source_path/$3
2569     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2570 }
2571
2572 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2573 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2574 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2575 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2576 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2577 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2578 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2579 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2580 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2581
2582 find_things_extern(){
2583     thing=$1
2584     pattern=$2
2585     file=$source_path/$3
2586     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2587 }
2588
2589 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2590 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2591
2592 ALL_COMPONENTS="
2593     $BSF_LIST
2594     $DECODER_LIST
2595     $DEMUXER_LIST
2596     $ENCODER_LIST
2597     $FILTER_LIST
2598     $HWACCEL_LIST
2599     $INDEV_LIST
2600     $MUXER_LIST
2601     $OUTDEV_LIST
2602     $PARSER_LIST
2603     $PROTOCOL_LIST
2604 "
2605
2606 for n in $COMPONENT_LIST; do
2607     v=$(toupper ${n%s})_LIST
2608     eval enable \$$v
2609     eval ${n}_if_any="\$$v"
2610 done
2611
2612 enable $ARCH_EXT_LIST
2613
2614 die_unknown(){
2615     echo "Unknown option \"$1\"."
2616     echo "See $0 --help for available options."
2617     exit 1
2618 }
2619
2620 print_3_columns() {
2621     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2622 }
2623
2624 show_list() {
2625     suffix=_$1
2626     shift
2627     echo $* | sed s/$suffix//g | print_3_columns
2628     exit 0
2629 }
2630
2631 rand_list(){
2632     IFS=', '
2633     set -- $*
2634     unset IFS
2635     for thing; do
2636         comp=${thing%:*}
2637         prob=${thing#$comp}
2638         prob=${prob#:}
2639         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2640         echo "prob ${prob:-0.5}"
2641         printf '%s\n' $comp
2642     done
2643 }
2644
2645 do_random(){
2646     action=$1
2647     shift
2648     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2649     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2650 }
2651
2652 for opt do
2653     optval="${opt#*=}"
2654     case "$opt" in
2655         --extra-ldflags=*)
2656             add_ldflags $optval
2657         ;;
2658         --extra-ldexeflags=*)
2659             add_ldexeflags $optval
2660         ;;
2661         --extra-libs=*)
2662             add_extralibs $optval
2663         ;;
2664         --disable-devices)
2665             disable $INDEV_LIST $OUTDEV_LIST
2666         ;;
2667         --enable-debug=*)
2668             debuglevel="$optval"
2669         ;;
2670         --disable-programs)
2671             disable $PROGRAM_LIST
2672         ;;
2673         --disable-everything)
2674             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2675         ;;
2676         --disable-all)
2677             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2678             disable $LIBRARY_LIST $PROGRAM_LIST doc
2679         ;;
2680         --enable-random|--disable-random)
2681             action=${opt%%-random}
2682             do_random ${action#--} $COMPONENT_LIST
2683         ;;
2684         --enable-random=*|--disable-random=*)
2685             action=${opt%%-random=*}
2686             do_random ${action#--} $optval
2687         ;;
2688         --enable-*=*|--disable-*=*)
2689             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2690             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2691             eval list=\$$(toupper $thing)_LIST
2692             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2693             $action $(filter "$name" $list)
2694         ;;
2695         --enable-avserver|--disable-avserver*)
2696             warn "avserver has been removed, the ${opt} option is only"\
2697                  "provided for compatibility and will be removed in the future"
2698         ;;
2699         --enable-?*|--disable-?*)
2700             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2701             if is_in $option $COMPONENT_LIST; then
2702                 test $action = disable && action=unset
2703                 eval $action \$$(toupper ${option%s})_LIST
2704             elif is_in $option $CMDLINE_SELECT; then
2705                 $action $option
2706             else
2707                 die_unknown $opt
2708             fi
2709         ;;
2710         --list-*)
2711             NAME="${opt#--list-}"
2712             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2713             NAME=${NAME%s}
2714             eval show_list $NAME \$$(toupper $NAME)_LIST
2715         ;;
2716         --help|-h) show_help
2717         ;;
2718         *)
2719             optname="${opt%%=*}"
2720             optname="${optname#--}"
2721             optname=$(echo "$optname" | sed 's/-/_/g')
2722             if is_in $optname $CMDLINE_SET; then
2723                 eval $optname='$optval'
2724             elif is_in $optname $CMDLINE_APPEND; then
2725                 append $optname "$optval"
2726             else
2727                 die_unknown $opt
2728             fi
2729         ;;
2730     esac
2731 done
2732
2733 for e in $env; do
2734     eval "export $e"
2735 done
2736
2737 disabled logging && logfile=/dev/null
2738
2739 # Disable all the library-specific components if the library itself
2740 # is disabled, see AVCODEC_LIST and following _LIST variables.
2741
2742 disable_components(){
2743     disabled ${1} && disable $(
2744         eval components="\$$(toupper ${1})_COMPONENTS"
2745         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2746     )
2747 }
2748
2749 map 'disable_components $v' $LIBRARY_LIST
2750
2751 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2752 set >> $logfile
2753
2754 case "$toolchain" in
2755     *-asan)
2756         cc_default="${toolchain%-asan}"
2757         add_cflags  -fsanitize=address
2758         add_ldflags -fsanitize=address
2759     ;;
2760     *-msan)
2761         cc_default="${toolchain%-msan}"
2762         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2763         add_ldflags -fsanitize=memory
2764     ;;
2765     *-tsan)
2766         cc_default="${toolchain%-tsan}"
2767         add_cflags  -fsanitize=thread -pie
2768         add_ldflags -fsanitize=thread -pie
2769         case "$toolchain" in
2770             gcc-tsan)
2771                 add_cflags  -fPIC
2772                 add_ldflags -fPIC
2773                 ;;
2774         esac
2775     ;;
2776     *-usan)
2777         cc_default="${toolchain%-usan}"
2778         add_cflags  -fsanitize=undefined
2779         add_ldflags -fsanitize=undefined
2780         case "$toolchain" in
2781             clang-usan)
2782                 add_cflags -O1
2783                 ;;
2784         esac
2785     ;;
2786     valgrind-*)
2787         target_exec_default="valgrind"
2788         case "$toolchain" in
2789             valgrind-massif)
2790                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2791                 ;;
2792             valgrind-memcheck)
2793                 target_exec_args="--track-origins=yes --leak-check=full"
2794                 ;;
2795         esac
2796     ;;
2797     msvc)
2798         # Check whether the current MSVC version needs the C99 converter.
2799         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2800         # support enough of C99 to build libav. Default to the new
2801         # behaviour if the regexp was unable to match anything, since this
2802         # successfully parses the version number of existing supported
2803         # versions that require the converter (MSVC 2010 and 2012).
2804         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2805         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2806             cc_default="cl"
2807         else
2808             cc_default="c99wrap cl"
2809         fi
2810         ld_default="$source_path/compat/windows/mslink"
2811         nm_default="dumpbin -symbols"
2812         ar_default="lib"
2813         case "$arch" in
2814         arm*)
2815             as_default="armasm"
2816             ;;
2817         esac
2818         target_os_default="win32"
2819         # Use a relative path for TMPDIR. This makes sure all the
2820         # ffconf temp files are written with a relative path, avoiding
2821         # issues with msys/win32 path conversion for MSVC parameters
2822         # such as -Fo<file> or -out:<file>.
2823         TMPDIR=.
2824     ;;
2825     icl)
2826         cc_default="icl"
2827         ld_default="xilink"
2828         nm_default="dumpbin -symbols"
2829         ar_default="xilib"
2830         target_os_default="win32"
2831         TMPDIR=.
2832     ;;
2833     gcov)
2834         add_cflags  -fprofile-arcs -ftest-coverage
2835         add_ldflags -fprofile-arcs -ftest-coverage
2836     ;;
2837     llvm-cov)
2838         add_cflags -fprofile-arcs -ftest-coverage
2839         add_ldflags --coverage
2840     ;;
2841     hardened)
2842         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2843         add_cflags   -fno-strict-overflow -fstack-protector-all
2844         add_ldflags  -Wl,-z,relro -Wl,-z,now
2845     ;;
2846     ?*)
2847         die "Unknown toolchain $toolchain"
2848     ;;
2849 esac
2850
2851 test -n "$cross_prefix" && enable cross_compile
2852
2853 if enabled cross_compile; then
2854     test -n "$arch" && test -n "$target_os" ||
2855         die "Must specify target arch and OS when cross-compiling"
2856 fi
2857
2858 ar_default="${cross_prefix}${ar_default}"
2859 cc_default="${cross_prefix}${cc_default}"
2860 occ_default="${cross_prefix}${occ_default}"
2861 nm_default="${cross_prefix}${nm_default}"
2862 pkg_config_default="${cross_prefix}${pkg_config_default}"
2863 ranlib="${cross_prefix}${ranlib}"
2864 strip="${cross_prefix}${strip}"
2865
2866 sysinclude_default="${sysroot}/usr/include"
2867
2868 set_default arch cc pkg_config sysinclude target_exec target_os
2869 enabled cross_compile || host_cc_default=$cc
2870 set_default host_cc
2871
2872 if ! $pkg_config --version >/dev/null 2>&1; then
2873     warn "$pkg_config not found, library detection may fail."
2874     pkg_config=false
2875 fi
2876
2877 exesuf() {
2878     case $1 in
2879         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2880     esac
2881 }
2882
2883 EXESUF=$(exesuf $target_os)
2884 HOSTEXESUF=$(exesuf $host_os)
2885
2886 # set temporary file name
2887 : ${TMPDIR:=$TEMPDIR}
2888 : ${TMPDIR:=$TMP}
2889 : ${TMPDIR:=/tmp}
2890
2891 if ! check_cmd mktemp -u XXXXXX; then
2892     # simple replacement for missing mktemp
2893     # NOT SAFE FOR GENERAL USE
2894     mktemp(){
2895         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2896     }
2897 fi
2898
2899 tmpfile(){
2900     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2901         (set -C; exec > $tmp) 2>/dev/null ||
2902         die "Unable to create temporary file in $TMPDIR."
2903     append TMPFILES $tmp
2904     eval $1=$tmp
2905 }
2906
2907 trap 'rm -f -- $TMPFILES' EXIT
2908
2909 tmpfile TMPASM .asm
2910 tmpfile TMPC   .c
2911 tmpfile TMPE   $EXESUF
2912 tmpfile TMPH   .h
2913 tmpfile TMPO   .o
2914 tmpfile TMPS   .S
2915 tmpfile TMPSH  .sh
2916 tmpfile TMPV   .ver
2917
2918 unset -f mktemp
2919
2920 chmod +x $TMPE
2921
2922 # make sure we can execute files in $TMPDIR
2923 cat > $TMPSH 2>> $logfile <<EOF
2924 #! /bin/sh
2925 EOF
2926 chmod +x $TMPSH >> $logfile 2>&1
2927 if ! $TMPSH >> $logfile 2>&1; then
2928     cat <<EOF
2929 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2930 variable to another directory and make sure that it is not mounted noexec.
2931 EOF
2932     die "Sanity test failed."
2933 fi
2934
2935 armasm_flags(){
2936     for flag; do
2937         case $flag in
2938             # Filter out MSVC cl.exe options from cflags that shouldn't
2939             # be passed to gas-preprocessor
2940             -M[TD]*)                                            ;;
2941             *)                  echo $flag                      ;;
2942         esac
2943    done
2944 }
2945
2946 ccc_flags(){
2947     for flag; do
2948         case $flag in
2949             -std=c99)           echo -c99                       ;;
2950             -mcpu=*)            echo -arch ${flag#*=}           ;;
2951             -mieee)             echo -ieee                      ;;
2952             -O*|-fast)          echo $flag                      ;;
2953             -fno-math-errno)    echo -assume nomath_errno       ;;
2954             -g)                 echo -g3                        ;;
2955             -Wall)              echo -msg_enable level2         ;;
2956             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2957             -Wl,*)              echo $flag                      ;;
2958             -f*|-W*)                                            ;;
2959             *)                  echo $flag                      ;;
2960         esac
2961    done
2962 }
2963
2964 cparser_flags(){
2965     for flag; do
2966         case $flag in
2967             -Wno-switch)             echo -Wno-switch-enum ;;
2968             -Wno-format-zero-length) ;;
2969             -Wdisabled-optimization) ;;
2970             -Wno-pointer-sign)       echo -Wno-other ;;
2971             *)                       echo $flag ;;
2972         esac
2973     done
2974 }
2975
2976 msvc_common_flags(){
2977     for flag; do
2978         case $flag in
2979             # In addition to specifying certain flags under the compiler
2980             # specific filters, they must be specified here as well or else the
2981             # generic catch all at the bottom will print the original flag.
2982             -Wall)                ;;
2983             -std=c99)             ;;
2984             # Common flags
2985             -fomit-frame-pointer) ;;
2986             -g)                   echo -Z7 ;;
2987             -fno-math-errno)      ;;
2988             -fno-common)          ;;
2989             -fno-signed-zeros)    ;;
2990             -fPIC)                ;;
2991             -mthumb)              ;;
2992             -march=*)             ;;
2993             -lz)                  echo zlib.lib ;;
2994             -lavifil32)           echo vfw32.lib ;;
2995             -lavicap32)           echo vfw32.lib user32.lib ;;
2996             -lx264)               echo libx264.lib ;;
2997             -l*)                  echo ${flag#-l}.lib ;;
2998             -L*)                  echo -libpath:${flag#-L} ;;
2999             *)                    echo $flag ;;
3000         esac
3001     done
3002 }
3003
3004 msvc_flags(){
3005     msvc_common_flags "$@"
3006     for flag; do
3007         case $flag in
3008             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3009                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3010                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3011                                        -wd4273 -wd4554 -wd4701 ;;
3012         esac
3013     done
3014 }
3015
3016 icl_flags(){
3017     msvc_common_flags "$@"
3018     for flag; do
3019         case $flag in
3020             # Despite what Intel's documentation says -Wall, which is supported
3021             # on Windows, does enable remarks so disable them here.
3022             -Wall)                echo $flag -Qdiag-disable:remark ;;
3023             -std=c99)             echo -Qstd=c99 ;;
3024         esac
3025     done
3026 }
3027
3028 pgi_flags(){
3029     for flag; do
3030         case $flag in
3031             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3032             -fomit-frame-pointer) echo -Mnoframe ;;
3033             -g)                   echo -gopt ;;
3034             *)                    echo $flag ;;
3035         esac
3036     done
3037 }
3038
3039 suncc_flags(){
3040     for flag; do
3041         case $flag in
3042             -march=*|-mcpu=*)
3043                 case "${flag#*=}" in
3044                     native)                   echo -xtarget=native       ;;
3045                     v9|niagara)               echo -xarch=sparc          ;;
3046                     ultrasparc)               echo -xarch=sparcvis       ;;
3047                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3048                     i586|pentium)             echo -xchip=pentium        ;;
3049                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3050                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3051                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3052                     pentium4*)          echo -xtarget=pentium4           ;;
3053                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3054                     *-sse3)             echo -xarch=sse3                 ;;
3055                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3056                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3057                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3058                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3059                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3060                     k8|opteron|athlon64|athlon-fx)
3061                                                echo -xarch=sse2a         ;;
3062                     athlon*)                   echo -xarch=pentium_proa  ;;
3063                 esac
3064                 ;;
3065             -std=c99)             echo -xc99              ;;
3066             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3067             -fPIC)                echo -KPIC -xcode=pic32 ;;
3068             -W*,*)                echo $flag              ;;
3069             -f*-*|-W*|-mimpure-text)                      ;;
3070             -shared)              echo -G                 ;;
3071             *)                    echo $flag              ;;
3072         esac
3073     done
3074 }
3075
3076 tms470_flags(){
3077     for flag; do
3078         case $flag in
3079             -march=*|-mcpu=*)
3080                 case "${flag#*=}" in
3081                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3082                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3083                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3084                     armv6*|arm11*)          echo -mv=6   ;;
3085                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3086                                             echo -mv=5e  ;;
3087                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3088                 esac
3089                 ;;
3090             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3091             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3092             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3093             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3094             -msoft-float)   echo --float_support=vfplib       ;;
3095             -O[0-3]|-mf=*)  echo $flag                        ;;
3096             -g)             echo -g -mn                       ;;
3097             -pds=*)         echo $flag                        ;;
3098             -D*|-I*)        echo $flag                        ;;
3099             --gcc|--abi=*)  echo $flag                        ;;
3100             -me)            echo $flag                        ;;
3101         esac
3102     done
3103 }
3104
3105 probe_cc(){
3106     pfx=$1
3107     _cc=$2
3108
3109     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3110     unset _ld_o _ldflags _ld_lib _ld_path
3111     unset _depflags _DEPCMD _DEPFLAGS
3112     _flags_filter=echo
3113
3114     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3115         _type=llvm_gcc
3116         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3117         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3118         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3119         _cflags_speed='-O3'
3120         _cflags_size='-Os'
3121     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3122         _type=gcc
3123         gcc_version=$($_cc --version | head -n1)
3124         gcc_basever=$($_cc -dumpversion)
3125         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3126         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3127         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3128         if ! $_cc -dumpversion | grep -q '^2\.'; then
3129             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3130         fi
3131         _cflags_speed='-O3'
3132         _cflags_size='-Os'
3133     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3134         _type=icc
3135         _ident=$($_cc --version | head -n1)
3136         _depflags='-MMD'
3137         _cflags_speed='-O3'
3138         _cflags_size='-Os'
3139         _cflags_noopt='-O1'
3140     elif $_cc -v 2>&1 | grep -q xlc; then
3141         _type=xlc
3142         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3143         _cflags_speed='-O5'
3144         _cflags_size='-O5 -qcompact'
3145     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3146         _type=ccc
3147         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3148         _DEPFLAGS='-M'
3149         _cflags_speed='-fast'
3150         _cflags_size='-O1'
3151         _flags_filter=ccc_flags
3152     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3153         test -d "$sysroot" || die "No valid sysroot specified."
3154         _type=armcc
3155         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3156         armcc_conf="$PWD/armcc.conf"
3157         $_cc --arm_linux_configure                 \
3158              --arm_linux_config_file="$armcc_conf" \
3159              --configure_sysroot="$sysroot"        \
3160              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3161              die "Error creating armcc configuration file."
3162         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3163         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3164         as_default="${cross_prefix}gcc"
3165         _depflags='-MMD'
3166         _cflags_speed='-O3'
3167         _cflags_size='-Os'
3168     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3169         _type=tms470
3170         _ident=$($_cc -version | head -n1 | tr -s ' ')
3171         _flags='--gcc --abi=eabi -me'
3172         _cc_e='-ppl -fe=$@'
3173         _cc_o='-fe=$@'
3174         _depflags='-ppa -ppd=$(@:.o=.d)'
3175         _cflags_speed='-O3 -mf=5'
3176         _cflags_size='-O3 -mf=2'
3177         _flags_filter=tms470_flags
3178     elif $_cc -v 2>&1 | grep -q clang; then
3179         _type=clang
3180         _ident=$($_cc --version 2>/dev/null | head -n1)
3181         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3182         _cflags_speed='-O3'
3183         _cflags_size='-Os'
3184     elif $_cc -V 2>&1 | grep -q Sun; then
3185         _type=suncc
3186         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3187         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3188         _DEPFLAGS='-xM1 -xc99'
3189         _ldflags='-std=c99'
3190         _cflags_speed='-O5'
3191         _cflags_size='-O5 -xspace'
3192         _flags_filter=suncc_flags
3193     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3194         _type=pathscale
3195         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3196         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3197         _cflags_speed='-O2'
3198         _cflags_size='-Os'
3199         _flags_filter='filter_out -Wdisabled-optimization'
3200     elif $_cc -v 2>&1 | grep -q Open64; then
3201         _type=open64
3202         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3203         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3204         _cflags_speed='-O2'
3205         _cflags_size='-Os'
3206         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3207     elif $_cc -V 2>&1 | grep -q Portland; then
3208         _type=pgi
3209         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3210         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3211         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3212         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3213         _cflags_noopt="-O1"
3214         _flags_filter=pgi_flags
3215     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3216         _type=armasm
3217         _ident=$($_cc | head -n1)
3218         # 4509: "This form of conditional instruction is deprecated"
3219         _flags="-nologo -ignore 4509"
3220         _flags_filter=armasm_flags
3221     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3222         _type=msvc
3223         _ident=$($_cc 2>&1 | head -n1)
3224         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3225         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3226         _cflags_speed="-O2"
3227         _cflags_size="-O1"
3228         if $_cc -nologo- 2>&1 | grep -q Linker; then
3229             _ld_o='-out:$@'
3230         else
3231             _ld_o='-Fe$@'
3232         fi
3233         _cc_o='-Fo$@'
3234         _cc_e='-P -Fi$@'
3235         _flags_filter=msvc_flags
3236         _ld_lib='lib%.a'
3237         _ld_path='-libpath:'
3238         _flags='-nologo'
3239         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3240     elif $_cc 2>&1 | grep -q Intel; then
3241         _type=icl
3242         _ident=$($_cc 2>&1 | head -n1)
3243         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3244         # Not only is O3 broken on 13.x+ but it is slower on all previous
3245         # versions (tested) as well.
3246         _cflags_speed="-O2"
3247         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3248         if $_cc 2>&1 | grep -q Linker; then
3249             _ld_o='-out:$@'
3250         else
3251             _ld_o='-Fe$@'
3252         fi
3253         _cc_o='-Fo$@'
3254         _cc_e='-P'
3255         _flags_filter=icl_flags
3256         _ld_lib='lib%.a'
3257         _ld_path='-libpath:'
3258         # -Qdiag-error to make icl error when seeing certain unknown arguments
3259         _flags='-nologo -Qdiag-error:4044,10157'
3260         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3261         # with MSVC which enables it by default.
3262         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3263     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3264         _type=cparser
3265         _ident=$($_cc --version | head -n1)
3266         _depflags='-MMD'
3267         _cflags_speed='-O4'
3268         _cflags_size='-O2'
3269         _flags_filter=cparser_flags
3270     fi
3271
3272     eval ${pfx}_type=\$_type
3273     eval ${pfx}_ident=\$_ident
3274 }
3275
3276 set_ccvars(){
3277     eval ${1}_C=\${_cc_c-\${${1}_C}}
3278     eval ${1}_E=\${_cc_e-\${${1}_E}}
3279     eval ${1}_O=\${_cc_o-\${${1}_O}}
3280
3281     if [ -n "$_depflags" ]; then
3282         eval ${1}_DEPFLAGS=\$_depflags
3283     else
3284         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3285         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3286         eval DEP${1}FLAGS=\$_flags
3287     fi
3288 }
3289
3290 probe_cc cc "$cc"
3291 cflags_filter=$_flags_filter
3292 cflags_speed=$_cflags_speed
3293 cflags_size=$_cflags_size
3294 cflags_noopt=$_cflags_noopt
3295 add_cflags $_flags $_cflags
3296 cc_ldflags=$_ldflags
3297 set_ccvars CC
3298
3299 probe_cc hostcc "$host_cc"
3300 host_cflags_filter=$_flags_filter
3301 add_host_cflags  $_flags $_cflags
3302 set_ccvars HOSTCC
3303
3304 test -n "$cc_type" && enable $cc_type ||
3305     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3306
3307 : ${as_default:=$cc}
3308 : ${objcc_default:=$cc}
3309 : ${dep_cc_default:=$cc}
3310 : ${ld_default:=$cc}
3311 : ${host_ld_default:=$host_cc}
3312 set_default ar as objcc dep_cc ld host_ld
3313
3314 probe_cc as "$as"
3315 asflags_filter=$_flags_filter
3316 add_asflags $_flags $_cflags
3317 set_ccvars AS
3318
3319 probe_cc objcc "$objcc"
3320 objcflags_filter=$_flags_filter
3321 add_objcflags $_flags $_cflags
3322 set_ccvars OBJC
3323
3324 probe_cc ld "$ld"
3325 ldflags_filter=$_flags_filter
3326 add_ldflags $_flags $_ldflags
3327 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3328 LD_O=${_ld_o-$LD_O}
3329 LD_LIB=${_ld_lib-$LD_LIB}
3330 LD_PATH=${_ld_path-$LD_PATH}
3331
3332 probe_cc hostld "$host_ld"
3333 host_ldflags_filter=$_flags_filter
3334 add_host_ldflags $_flags $_ldflags
3335 HOSTLD_O=${_ld_o-$HOSTLD_O}
3336
3337 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3338     probe_cc depcc "$dep_cc"
3339     CCDEP=${_DEPCMD:-$DEPCMD}
3340     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3341     DEPCCFLAGS=$_flags
3342 fi
3343
3344 if $ar 2>&1 | grep -q Microsoft; then
3345     arflags="-nologo"
3346     ar_o='-out:$@'
3347 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3348     arflags="rq"
3349     ar_o='$@'
3350 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3351     arflags='-Xany -r -c'
3352     ar_o='$@'
3353 else
3354     arflags="rc"
3355     ar_o='$@'
3356 fi
3357
3358 add_cflags $extra_cflags
3359 add_objcflags $extra_objcflags
3360 add_asflags $extra_cflags
3361
3362 if test -n "$sysroot"; then
3363     case "$cc_type" in
3364         gcc|llvm_gcc|clang)
3365             add_cppflags --sysroot="$sysroot"
3366             add_ldflags --sysroot="$sysroot"
3367         ;;
3368         tms470)
3369             add_cppflags -I"$sysinclude"
3370             add_ldflags  --sysroot="$sysroot"
3371         ;;
3372     esac
3373 fi
3374
3375 if test "$cpu" = host; then
3376     enabled cross_compile &&
3377         die "--cpu=host makes no sense when cross-compiling."
3378
3379     case "$cc_type" in
3380         gcc|llvm_gcc)
3381             check_native(){
3382                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3383                 sed -n "/cc1.*$1=/{
3384                             s/.*$1=\\([^ ]*\\).*/\\1/
3385                             p
3386                             q
3387                         }" $TMPE
3388             }
3389             cpu=$(check_native -march || check_native -mcpu)
3390         ;;
3391     esac
3392
3393     test "${cpu:-host}" = host &&
3394         die "--cpu=host not supported with compiler $cc"
3395 fi
3396
3397 # Deal with common $arch aliases
3398 case "$arch" in
3399     aarch64|arm64)
3400         arch="aarch64"
3401     ;;
3402     arm*)
3403         arch="arm"
3404     ;;
3405     mips*|IP*)
3406         case "$arch" in
3407         *el)
3408             add_cppflags -EL
3409             add_ldflags -EL
3410         ;;
3411         *eb)
3412             add_cppflags -EB
3413             add_ldflags -EB
3414         ;;
3415         esac
3416         arch="mips"
3417     ;;
3418     parisc*|hppa*)
3419         arch="parisc"
3420     ;;
3421     "Power Macintosh"|ppc*|powerpc*)
3422         arch="ppc"
3423     ;;
3424     s390|s390x)
3425         arch="s390"
3426     ;;
3427     sh4|sh)
3428         arch="sh4"
3429     ;;
3430     sun4u|sparc*)
3431         arch="sparc"
3432     ;;
3433     tilegx|tile-gx)
3434         arch="tilegx"
3435     ;;
3436     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3437         arch="x86"
3438     ;;
3439 esac
3440
3441 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3442 enable $arch
3443
3444 # Add processor-specific flags
3445 if enabled aarch64; then
3446
3447     case $cpu in
3448         armv*)
3449             cpuflags="-march=$cpu"
3450         ;;
3451         *)
3452             cpuflags="-mcpu=$cpu"
3453         ;;
3454     esac
3455
3456 elif enabled alpha; then
3457
3458     cpuflags="-mcpu=$cpu"
3459
3460 elif enabled arm; then
3461
3462     check_arm_arch() {
3463         check_cpp_condition stddef.h \
3464             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3465             $cpuflags
3466     }
3467
3468     probe_arm_arch() {
3469         if   check_arm_arch 4;        then echo armv4
3470         elif check_arm_arch 4T;       then echo armv4t
3471         elif check_arm_arch 5;        then echo armv5
3472         elif check_arm_arch 5E;       then echo armv5e
3473         elif check_arm_arch 5T;       then echo armv5t
3474         elif check_arm_arch 5TE;      then echo armv5te
3475         elif check_arm_arch 5TEJ;     then echo armv5te
3476         elif check_arm_arch 6;        then echo armv6
3477         elif check_arm_arch 6J;       then echo armv6j
3478         elif check_arm_arch 6K;       then echo armv6k
3479         elif check_arm_arch 6Z;       then echo armv6z
3480         elif check_arm_arch 6ZK;      then echo armv6zk
3481         elif check_arm_arch 6T2;      then echo armv6t2
3482         elif check_arm_arch 7;        then echo armv7
3483         elif check_arm_arch 7A  7_A;  then echo armv7-a
3484         elif check_arm_arch 7S;       then echo armv7-a
3485         elif check_arm_arch 7R  7_R;  then echo armv7-r
3486         elif check_arm_arch 7M  7_M;  then echo armv7-m
3487         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3488         elif check_arm_arch 8A  8_A;  then echo armv8-a
3489         fi
3490     }
3491
3492     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3493
3494     case $cpu in
3495         armv*)
3496             cpuflags="-march=$cpu"
3497             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3498         ;;
3499         *)
3500             cpuflags="-mcpu=$cpu"
3501             case $cpu in
3502                 cortex-a*)                               subarch=armv7a  ;;
3503                 cortex-r*)                               subarch=armv7r  ;;
3504                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3505                 arm11*)                                  subarch=armv6   ;;
3506                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3507                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3508                 *)                             subarch=$(probe_arm_arch) ;;
3509             esac
3510         ;;
3511     esac
3512
3513     case "$subarch" in
3514         armv5t*)    enable fast_clz                ;;
3515         armv[6-8]*) enable fast_clz fast_unaligned ;;
3516     esac
3517
3518 elif enabled avr32; then
3519
3520     case $cpu in
3521         ap7[02]0[0-2])
3522             subarch="avr32_ap"
3523             cpuflags="-mpart=$cpu"
3524         ;;
3525         ap)
3526             subarch="avr32_ap"
3527             cpuflags="-march=$cpu"
3528         ;;
3529         uc3[ab]*)
3530             subarch="avr32_uc"
3531             cpuflags="-mcpu=$cpu"
3532         ;;
3533         uc)
3534             subarch="avr32_uc"
3535             cpuflags="-march=$cpu"
3536         ;;
3537     esac
3538
3539 elif enabled bfin; then
3540
3541     cpuflags="-mcpu=$cpu"
3542
3543 elif enabled mips; then
3544
3545     cpuflags="-march=$cpu"
3546
3547 elif enabled ppc; then
3548
3549     disable ldbrx
3550
3551     case $(tolower $cpu) in
3552         601|ppc601|powerpc601)
3553             cpuflags="-mcpu=601"
3554             disable altivec
3555         ;;
3556         603*|ppc603*|powerpc603*)
3557             cpuflags="-mcpu=603"
3558             disable altivec
3559         ;;
3560         604*|ppc604*|powerpc604*)
3561             cpuflags="-mcpu=604"
3562             disable altivec
3563         ;;
3564         g3|75*|ppc75*|powerpc75*)
3565             cpuflags="-mcpu=750"
3566             disable altivec
3567         ;;
3568         g4|745*|ppc745*|powerpc745*)
3569             cpuflags="-mcpu=7450"
3570             disable vsx
3571         ;;
3572         74*|ppc74*|powerpc74*)
3573             cpuflags="-mcpu=7400"
3574             disable vsx
3575         ;;
3576         g5|970|ppc970|powerpc970)
3577             cpuflags="-mcpu=970"
3578             disable vsx
3579         ;;
3580         power[3-6]*)
3581             cpuflags="-mcpu=$cpu"
3582             disable vsx
3583         ;;
3584         power[7-8]*)
3585             cpuflags="-mcpu=$cpu"
3586             enable ldbrx
3587         ;;
3588         cell)
3589             cpuflags="-mcpu=cell"
3590             enable ldbrx
3591             disable vsx
3592         ;;
3593         e500mc)
3594             cpuflags="-mcpu=e500mc"
3595             disable altivec
3596         ;;
3597         e500v2)
3598             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3599             disable altivec
3600             disable dcbzl
3601         ;;
3602         e500)
3603             cpuflags="-mcpu=8540 -mhard-float"
3604             disable altivec
3605             disable dcbzl
3606         ;;
3607     esac
3608
3609 elif enabled sparc; then
3610
3611     case $cpu in
3612         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3613             cpuflags="-mcpu=$cpu"
3614         ;;
3615         ultrasparc*|niagara[234])
3616             cpuflags="-mcpu=$cpu"
3617         ;;
3618     esac
3619
3620 elif enabled x86; then
3621
3622     case $cpu in
3623         i[345]86|pentium)
3624             cpuflags="-march=$cpu"
3625             disable i686
3626             disable mmx
3627         ;;
3628         # targets that do NOT support nopl and conditional mov (cmov)
3629         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3630             cpuflags="-march=$cpu"
3631             disable i686
3632         ;;
3633         # targets that do support nopl and conditional mov (cmov)
3634         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3635             cpuflags="-march=$cpu"
3636             enable i686
3637             enable fast_cmov
3638         ;;
3639         # targets that do support conditional mov but on which it's slow
3640         pentium4|pentium4m|prescott|nocona)
3641             cpuflags="-march=$cpu"
3642             enable i686
3643             disable fast_cmov
3644         ;;
3645     esac
3646
3647 fi
3648
3649 if [ "$cpu" != generic ]; then
3650     add_cflags  $cpuflags
3651     add_asflags $cpuflags
3652     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3653 fi
3654
3655 # compiler sanity check
3656 check_exec <<EOF
3657 int main(void){ return 0; }
3658 EOF
3659 if test "$?" != 0; then
3660     echo "$cc is unable to create an executable file."
3661     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3662         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3663         echo "Only do this if you know what cross compiling means."
3664     fi
3665     die "C compiler test failed."
3666 fi
3667
3668 add_cppflags -D_ISOC99_SOURCE
3669 check_cflags -std=c99
3670 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3671 #include <stdlib.h>
3672 EOF
3673 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3674 #include <stdlib.h>
3675 EOF
3676
3677 add_host_cppflags -D_ISOC99_SOURCE
3678 check_host_cflags -std=c99
3679 check_host_cflags -Wall
3680 check_host_cflags -O3
3681
3682 check_64bit(){
3683     arch32=$1
3684     arch64=$2
3685     expr=$3
3686     check_code cc "" "int test[2*($expr) - 1]" &&
3687         subarch=$arch64 || subarch=$arch32
3688 }
3689
3690 case "$arch" in
3691     aarch64|alpha|ia64)
3692         spic=$shared
3693     ;;
3694     mips)
3695         check_64bit mips mips64 '_MIPS_SIM > 1'
3696         spic=$shared
3697     ;;
3698     parisc)
3699         check_64bit parisc parisc64 'sizeof(void *) > 4'
3700         spic=$shared
3701     ;;
3702     ppc)
3703         check_64bit ppc ppc64 'sizeof(void *) > 4'
3704         spic=$shared
3705     ;;
3706     s390)
3707         check_64bit s390 s390x 'sizeof(void *) > 4'
3708         spic=$shared
3709     ;;
3710     sparc)
3711         check_64bit sparc sparc64 'sizeof(void *) > 4'
3712         spic=$shared
3713     ;;
3714     x86)
3715         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3716         if test "$subarch" = "x86_64"; then
3717             spic=$shared
3718         fi
3719     ;;
3720 esac
3721
3722 enable $subarch
3723 enabled spic && enable_weak pic
3724
3725 # OS specific
3726 case $target_os in
3727     aix)
3728         SHFLAGS=-shared
3729         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3730         enabled shared && add_ldflags -Wl,-brtl
3731         ;;
3732     android)
3733         disable symver
3734         enable section_data_rel_ro
3735         SLIB_INSTALL_NAME='$(SLIBNAME)'
3736         SLIB_INSTALL_LINKS=
3737         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3738         ;;
3739     haiku)
3740         prefix_default="/boot/common"
3741         network_extralibs="-lnetwork"
3742         host_libs=
3743         ;;
3744     sunos)
3745         SHFLAGS='-shared -Wl,-h,$$(@F)'
3746         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3747         network_extralibs="-lsocket -lnsl"
3748         # When using suncc to build, the Solaris linker will mark
3749         # an executable with each instruction set encountered by
3750         # the Solaris assembler.  As our libraries contain their own
3751         # guards for processor-specific code, instead suppress
3752         # generation of the HWCAPS ELF section on Solaris x86 only.
3753         enabled_all suncc x86 &&
3754             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3755             add_ldflags -Wl,-M,mapfile
3756         nm_default='nm -P -g'
3757         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3758         ;;
3759     netbsd)
3760         disable symver
3761         oss_indev_extralibs="-lossaudio"
3762         oss_outdev_extralibs="-lossaudio"
3763         ;;
3764     openbsd|bitrig)
3765         disable symver
3766         SHFLAGS='-shared'
3767         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3768         SLIB_INSTALL_LINKS=
3769         oss_indev_extralibs="-lossaudio"
3770         oss_outdev_extralibs="-lossaudio"
3771         ;;
3772     dragonfly)
3773         disable symver
3774         ;;
3775     freebsd)
3776         ;;
3777     bsd/os)
3778         add_extralibs -lpoll -lgnugetopt
3779         ;;
3780     darwin)
3781         enabled ppc && add_asflags -force_cpusubtype_ALL
3782         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3783         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3784         add_ldflags -Wl,-dynamic,-search_paths_first
3785         SLIBSUF=".dylib"
3786         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3787         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3788         objformat="macho"
3789         enabled x86_64 && objformat="macho64"
3790         enabled_any pic shared ||
3791             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3792         check_header dispatch/dispatch.h &&
3793             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3794         ;;
3795     msys*)
3796         die "Native MSYS builds are discouraged, please use the MINGW environment."
3797         ;;
3798     mingw32*|mingw64*)
3799         if test $target_os = "mingw32ce"; then
3800             disable network
3801         else
3802             target_os=mingw32
3803         fi
3804         LIBTARGET=i386
3805         if enabled x86_64; then
3806             LIBTARGET="i386:x86-64"
3807         elif enabled arm; then
3808             LIBTARGET=arm-wince
3809         fi
3810         check_ldflags -Wl,--nxcompat
3811         check_ldflags -Wl,--dynamicbase
3812         shlibdir_default="$bindir_default"
3813         SLIBPREF=""
3814         SLIBSUF=".dll"
3815         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3816         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3817         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3818         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3819         SLIB_INSTALL_LINKS=
3820         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3821         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3822         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3823         objformat="win32"
3824         dlltool="${cross_prefix}dlltool"
3825         ranlib=:
3826         enable dos_paths
3827         ;;
3828     win32|win64)
3829         disable symver
3830         if enabled shared; then
3831             # Link to the import library instead of the normal static library
3832             # for shared libs.
3833             LD_LIB='%.lib'
3834             # Cannot build both shared and static libs with MSVC or icl.
3835             disable static
3836         fi
3837         shlibdir_default="$bindir_default"
3838         SLIBPREF=""
3839         SLIBSUF=".dll"
3840         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3841         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3842         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3843         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3844         SLIB_INSTALL_LINKS=
3845         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3846         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3847         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3848         objformat="win32"
3849         ranlib=:
3850         enable dos_paths
3851         ;;
3852     cygwin*)
3853         target_os=cygwin
3854         shlibdir_default="$bindir_default"
3855         SLIBPREF="cyg"
3856         SLIBSUF=".dll"
3857         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3858         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3859         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3860         SLIB_INSTALL_LINKS=
3861         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3862         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3863         objformat="win32"
3864         enable dos_paths
3865         ;;
3866     *-dos|freedos|opendos)
3867         network_extralibs="-lsocket"
3868         objformat="coff"
3869         enable dos_paths
3870         add_cppflags -U__STRICT_ANSI__
3871         ;;
3872     linux)
3873         enable dv1394
3874         enable section_data_rel_ro
3875         ;;
3876     irix*)
3877         target_os=irix
3878         ranlib="echo ignoring ranlib"
3879         ;;
3880     os/2*)
3881         ln_s="cp -f"
3882         objformat="aout"
3883         add_cppflags -D_GNU_SOURCE
3884         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3885         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3886         LIBSUF="_s.a"
3887         SLIBPREF=""
3888         SLIBSUF=".dll"
3889         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3890         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3891         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3892             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3893             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3894             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3895             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3896         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3897             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3898         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3899         enable dos_paths
3900         ;;
3901     gnu/kfreebsd)
3902         add_cppflags -D_BSD_SOURCE
3903         ;;
3904     gnu)
3905         ;;
3906     qnx)
3907         add_cppflags -D_QNX_SOURCE
3908         network_extralibs="-lsocket"
3909         ;;
3910     symbian)
3911         SLIBSUF=".dll"
3912         enable dos_paths
3913         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3914         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3915         add_ldflags -Wl,--target1-abs,--no-undefined \
3916                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3917                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3918         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3919                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3920                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3921         ;;
3922     osf1)
3923         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3924         ;;
3925     minix)
3926         ;;
3927     plan9)
3928         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3929                      -D_REENTRANT_SOURCE        \
3930                      -D_RESEARCH_SOURCE         \
3931                      -DFD_SETSIZE=96            \
3932                      -DHAVE_SOCK_OPTS
3933         add_compat strtod.o strtod=avpriv_strtod
3934         network_extralibs='-lbsd'
3935         exeobjs=compat/plan9/main.o
3936         cp_f='cp'
3937         ;;
3938     none)
3939         ;;
3940     *)
3941         die "Unknown OS '$target_os'."
3942         ;;
3943 esac
3944
3945 # determine libc flavour
3946
3947 probe_libc(){
3948     pfx=$1
3949     pfx_no_=${pfx%_}
3950     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3951     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3952         eval ${pfx}libc_type=uclibc
3953         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3954     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3955         eval ${pfx}libc_type=glibc
3956         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3957     # MinGW headers can be installed on Cygwin, so check for newlib first.
3958     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3959         eval ${pfx}libc_type=newlib
3960         add_${pfx}cppflags -U__STRICT_ANSI__
3961     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3962     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3963         eval ${pfx}libc_type=mingw64
3964         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3965         eval test \$${pfx_no_}cc_type = "gcc" &&
3966             add_${pfx}cppflags -D__printf__=__gnu_printf__
3967     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3968          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3969         eval ${pfx}libc_type=mingw32
3970         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3971             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3972             die "ERROR: MinGW32 runtime version must be >= 3.15."
3973         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3974         eval test \$${pfx_no_}cc_type = "gcc" &&
3975             add_${pfx}cppflags -D__printf__=__gnu_printf__
3976     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3977         eval ${pfx}libc_type=msvcrt
3978         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3979             if [ "$pfx" = host_ ]; then
3980                 add_host_cppflags -Dsnprintf=_snprintf
3981             else
3982                 add_compat strtod.o strtod=avpriv_strtod
3983                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3984                                              _snprintf=avpriv_snprintf  \
3985                                              vsnprintf=avpriv_vsnprintf
3986             fi
3987         fi
3988         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3989         # 0x601 by default unless something else is set by the user.
3990         # This can easily lead to us detecting functions only present
3991         # in such new versions and producing binaries requiring windows 7.0.
3992         # Therefore explicitly set the default to XP unless the user has
3993         # set something else on the command line.
3994         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3995         # family. For these cases, configure is free to use any functions
3996         # found in the SDK headers by default. (Alternatively, we could force
3997         # _WIN32_WINNT to 0x0602 in that case.)
3998         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3999             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4000 #ifdef WINAPI_FAMILY
4001 #include <winapifamily.h>
4002 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4003 #error not desktop
4004 #endif
4005 #endif
4006 EOF
4007     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4008         eval ${pfx}libc_type=klibc
4009     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4010         eval ${pfx}libc_type=bionic
4011     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4012         eval ${pfx}libc_type=solaris
4013         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4014     else
4015         eval ${pfx}libc_type=default
4016         add_${pfx}cppflags -D_DEFAULT_SOURCE
4017     fi
4018 }
4019
4020 probe_libc
4021 test -n "$libc_type" && enable libc_$libc_type
4022 probe_libc host_
4023 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4024
4025 case $libc_type in
4026     bionic)
4027         add_compat strtod.o strtod=avpriv_strtod
4028         ;;
4029 esac
4030
4031 # hacks for compiler/libc/os combinations
4032
4033 if enabled_all tms470 libc_glibc; then
4034     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4035     add_cppflags -D__USER_LABEL_PREFIX__=
4036     add_cppflags -D__builtin_memset=memset
4037     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4038     add_cflags   -pds=48    # incompatible redefinition of macro
4039 fi
4040
4041 if enabled_all ccc libc_glibc; then
4042     add_ldflags -Wl,-z,now  # calls to libots crash without this
4043 fi
4044
4045 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4046     add_cppflags '-I\$(SRC_PATH)/compat/float'
4047
4048 esc(){
4049     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4050 }
4051
4052 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4053
4054 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4055
4056 set_default $PATHS_LIST
4057 set_default nm
4058
4059 # we need to build at least one lib type
4060 if ! enabled_any static shared; then
4061     cat <<EOF
4062 At least one library type must be built.
4063 Specify --enable-static to build the static libraries or --enable-shared to
4064 build the shared libraries as well. To only build the shared libraries specify
4065 --disable-static in addition to --enable-shared.
4066 EOF
4067     exit 1
4068 fi
4069
4070 die_license_disabled() {
4071     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4072 }
4073
4074 die_license_disabled gpl libcdio
4075 die_license_disabled gpl libx264
4076 die_license_disabled gpl libx265
4077 die_license_disabled gpl libxavs
4078 die_license_disabled gpl libxvid
4079 die_license_disabled gpl x11grab
4080
4081 die_license_disabled nonfree cuda
4082 die_license_disabled nonfree libfaac
4083 die_license_disabled nonfree libfdk_aac
4084 die_license_disabled nonfree libnpp
4085 die_license_disabled nonfree nvenc
4086 die_license_disabled nonfree openssl
4087
4088 die_license_disabled version3 libopencore_amrnb
4089 die_license_disabled version3 libopencore_amrwb
4090 die_license_disabled version3 libvo_aacenc
4091 die_license_disabled version3 libvo_amrwbenc
4092
4093 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4094
4095 disabled optimizations || check_cflags -fomit-frame-pointer
4096
4097 enable_weak_pic() {
4098     disabled pic && return
4099     enable pic
4100     add_cppflags -DPIC
4101     case "$target_os" in
4102     mingw*|cygwin*)
4103         ;;
4104     *)
4105         add_cflags -fPIC
4106         ;;
4107     esac
4108     add_asflags  -fPIC
4109 }
4110
4111 enabled pic && enable_weak_pic
4112
4113 check_cc <<EOF || die "Symbol mangling check failed."
4114 int ff_extern;
4115 EOF
4116 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4117 extern_prefix=${sym%%ff_extern*}
4118
4119 check_cc <<EOF && enable_weak inline_asm
4120 void foo(void) { __asm__ volatile ("" ::); }
4121 EOF
4122
4123 _restrict=
4124 for restrict_keyword in restrict __restrict__ __restrict; do
4125     check_cc <<EOF && _restrict=$restrict_keyword && break
4126 void foo(char * $restrict_keyword p);
4127 EOF
4128 done
4129
4130 check_cc <<EOF && enable pragma_deprecated
4131 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4132 EOF
4133
4134 check_cc <<EOF && enable attribute_packed
4135 struct { int x; } __attribute__((packed)) x;
4136 EOF
4137
4138 check_cc <<EOF && enable attribute_may_alias
4139 union { int x; } __attribute__((may_alias)) x;
4140 EOF
4141
4142 check_cc <<EOF || die "endian test failed"
4143 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4144 EOF
4145 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4146
4147 check_gas() {
4148     log "check_gas using '$as' as AS"
4149     # :vararg is used on aarch64, arm and ppc altivec
4150     check_as <<EOF || return 1
4151 .macro m n, y:vararg=0
4152 \n: .int \y
4153 .endm
4154 m x
4155 EOF
4156     # .altmacro is only used in arm asm
4157     ! enabled arm || check_as <<EOF || return 1
4158 .altmacro
4159 EOF
4160     enable gnu_as
4161     return 0
4162 }
4163
4164 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4165     nogas=:
4166     enabled_any arm aarch64 && nogas=die
4167     enabled_all ppc altivec && nogas=warn
4168     as_noop=-v
4169
4170     case $as_type in
4171         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4172         gcc)  gaspp_as_type=gas ;;
4173         *)    gaspp_as_type=$as_type ;;
4174     esac
4175
4176     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4177
4178     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4179         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4180
4181     if ! check_gas ; then
4182         as=${gas:=$as}
4183         check_gas || \
4184             $nogas "GNU assembler not found, install/update gas-preprocessor"
4185     fi
4186
4187     check_as <<EOF && enable as_func
4188 .func test
4189 .endfunc
4190 EOF
4191 fi
4192
4193 check_inline_asm inline_asm_labels '"1:\n"'
4194
4195 if enabled aarch64; then
4196     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4197     # internal assembler in clang 3.3 does not support this instruction
4198     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4199     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4200
4201     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4202
4203 elif enabled alpha; then
4204
4205     check_cflags -mieee
4206
4207 elif enabled arm; then
4208
4209     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4210     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4211     enabled thumb && check_cflags -mthumb || check_cflags -marm
4212
4213     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4214         enable vfp_args
4215     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4216         enable vfp_args
4217     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4218         case "${cross_prefix:-$cc}" in
4219             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4220             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4221 __asm__ (".eabi_attribute 28, 1");
4222 int main(void) { return 0; }
4223 EOF
4224         esac
4225         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4226     fi
4227
4228     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4229     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4230     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4231     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4232     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4233     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4234
4235     [ $target_os = linux ] || [ $target_os = android ] ||
4236         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4237             $ARCH_EXT_LIST_ARM
4238
4239     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4240
4241     check_as <<EOF && enable as_dn_directive
4242 ra .dn d0.i16
4243 .unreq ra
4244 EOF
4245
4246     # llvm's integrated assembler supports .object_arch from llvm 3.5
4247     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4248 .object_arch armv4
4249 EOF
4250
4251     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4252
4253 elif enabled mips; then
4254
4255     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4256
4257     # make sure that only an instruction set is enabled
4258     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4259
4260     if enabled mips64; then
4261         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4262             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4263                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4264     else
4265         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4266             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4267                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4268     fi
4269
4270 elif enabled parisc; then
4271
4272     if enabled gcc; then
4273         case $($cc -dumpversion) in
4274             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4275         esac
4276     fi
4277
4278 elif enabled ppc; then
4279
4280     enable local_aligned_8 local_aligned_16
4281
4282     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4283     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4284     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4285     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4286
4287     # AltiVec flags: The FSF version of GCC differs from the Apple version
4288     if enabled altivec; then
4289         check_cflags -maltivec -mabi=altivec &&
4290         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4291         check_cflags -faltivec
4292
4293         # check if our compiler supports Motorola AltiVec C API
4294         check_cc <<EOF || disable altivec
4295 $inc_altivec_h
4296 int main(void) {
4297     vector signed int v1 = (vector signed int) { 0 };
4298     vector signed int v2 = (vector signed int) { 1 };
4299     v1 = vec_add(v1, v2);
4300     return 0;
4301 }
4302 EOF
4303
4304         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4305     fi
4306
4307     if enabled vsx; then
4308         check_cflags -mvsx &&
4309         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4310     fi
4311
4312     if enabled power8; then
4313         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4314     fi
4315
4316 elif enabled x86; then
4317
4318     check_builtin rdtsc    intrin.h   "__rdtsc()"
4319     check_builtin mm_empty mmintrin.h "_mm_empty()"
4320
4321     enable local_aligned_8 local_aligned_16
4322
4323     # check whether EBP is available on x86
4324     # As 'i' is stored on the stack, this program will crash
4325     # if the base pointer is used to access it because the
4326     # base pointer is cleared in the inline assembly code.
4327     check_exec_crash <<EOF && enable ebp_available
4328 volatile int i=0;
4329 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4330 return i;
4331 EOF
4332
4333     # check whether EBX is available on x86
4334     check_inline_asm ebx_available '""::"b"(0)' &&
4335         check_inline_asm ebx_available '"":::"%ebx"'
4336
4337     # check whether xmm clobbers are supported
4338     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4339
4340     # check whether binutils is new enough to compile SSSE3/MMXEXT
4341     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4342     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4343
4344     if ! disabled_any asm mmx yasm; then
4345         if check_cmd $yasmexe --version; then
4346             enabled x86_64 && yasm_extra="-m amd64"
4347             yasm_debug="-g dwarf2"
4348         elif check_cmd nasm -v; then
4349             yasmexe=nasm
4350             yasm_debug="-g -F dwarf"
4351             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4352         fi
4353
4354         YASMFLAGS="-f $objformat $yasm_extra"
4355         enabled pic               && append YASMFLAGS "-DPIC"
4356         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4357         case "$objformat" in
4358             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4359         esac
4360
4361         check_yasm "movbe ecx, [5]" && enable yasm ||
4362             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4363         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4364         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4365         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4366         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4367         check_yasm "CPU amdnop" || disable cpunop
4368     fi
4369
4370     case "$cpu" in
4371         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4372             disable fast_clz
4373         ;;
4374     esac
4375
4376 fi
4377
4378 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4379
4380 check_ldflags -Wl,--as-needed
4381
4382 if check_func dlopen; then
4383     ldl=
4384 elif check_func dlopen -ldl; then
4385     ldl=-ldl
4386 fi
4387
4388 if ! disabled network; then
4389     check_func getaddrinfo $network_extralibs
4390     check_func inet_aton $network_extralibs
4391
4392     check_type netdb.h "struct addrinfo"
4393     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4394     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4395     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4396     check_type poll.h "struct pollfd"
4397     check_type netinet/sctp.h "struct sctp_event_subscribe"
4398     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4399     check_type netinet/in.h "struct sockaddr_in6"
4400     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4401     check_type "sys/types.h sys/socket.h" socklen_t
4402
4403     # Prefer arpa/inet.h over winsock2
4404     if check_header arpa/inet.h ; then
4405         check_func closesocket
4406     elif check_header winsock2.h ; then
4407         check_func_headers winsock2.h closesocket -lws2 &&
4408             network_extralibs="-lws2" ||
4409         { check_func_headers winsock2.h closesocket -lws2_32 &&
4410             network_extralibs="-lws2_32"; } || disable winsock2_h network
4411         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4412
4413         check_type ws2tcpip.h socklen_t
4414         check_type ws2tcpip.h "struct addrinfo"
4415         check_type ws2tcpip.h "struct group_source_req"
4416         check_type ws2tcpip.h "struct ip_mreq_source"
4417         check_type ws2tcpip.h "struct ipv6_mreq"
4418         check_type winsock2.h "struct pollfd"
4419         check_struct winsock2.h "struct sockaddr" sa_len
4420         check_type ws2tcpip.h "struct sockaddr_in6"
4421         check_type ws2tcpip.h "struct sockaddr_storage"
4422     else
4423         disable network
4424     fi
4425 fi
4426
4427 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4428 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4429 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4430 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4431
4432 case "$custom_allocator" in
4433     jemalloc)
4434         # jemalloc by default does not use a prefix
4435         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4436     ;;
4437     tcmalloc)
4438         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4439         malloc_prefix=tc_
4440     ;;
4441 esac
4442
4443 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4444 check_func  ${malloc_prefix}memalign            && enable memalign
4445 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4446
4447 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4448     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4449
4450 check_func  fcntl
4451 check_func  fork
4452 check_func  gethrtime
4453 check_func  getopt
4454 check_func  getrusage
4455 check_func  gettimeofday
4456 check_func  gmtime_r
4457 check_func  isatty
4458 check_func  localtime_r
4459 check_func  mach_absolute_time
4460 check_func  mkstemp
4461 check_func  mmap
4462 check_func  mprotect
4463 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4464 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4465 check_func  sched_getaffinity
4466 check_func  setrlimit
4467 check_func  strerror_r
4468 check_func  sysconf
4469 check_func  sysctl
4470 check_func  usleep
4471
4472 check_func_headers io.h setmode
4473 check_func_headers stdlib.h getenv
4474
4475 check_func_headers windows.h CoTaskMemFree -lole32
4476 check_func_headers windows.h GetProcessAffinityMask
4477 check_func_headers windows.h GetProcessTimes
4478 check_func_headers windows.h GetSystemTimeAsFileTime
4479 check_func_headers windows.h LoadLibrary
4480 check_func_headers windows.h MapViewOfFile
4481 check_func_headers windows.h SetConsoleTextAttribute
4482 check_func_headers windows.h Sleep
4483 check_func_headers windows.h VirtualAlloc
4484 check_struct windows.h "CONDITION_VARIABLE" Ptr
4485
4486 check_header direct.h
4487 check_header dlfcn.h
4488 check_header d3d11.h
4489 check_header dxva.h
4490 check_header dxva2api.h
4491 check_header io.h
4492 check_header mach/mach_time.h
4493 check_header malloc.h
4494 check_header poll.h
4495 check_header sys/mman.h
4496 check_header sys/param.h
4497 check_header sys/resource.h
4498 check_header sys/select.h
4499 check_header sys/time.h
4500 check_header sys/un.h
4501 check_header unistd.h
4502 check_header valgrind/valgrind.h
4503 check_header vdpau/vdpau.h
4504 check_header vdpau/vdpau_x11.h
4505 check_header VideoDecodeAcceleration/VDADecoder.h
4506 check_header windows.h
4507 check_header X11/extensions/XvMClib.h
4508
4509 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4510 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4511 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4512
4513 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4514
4515 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4516 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4517 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4518
4519 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4520 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4521 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4522 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4523
4524 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4525
4526 if ! disabled w32threads && ! enabled pthreads; then
4527     check_func_headers "windows.h process.h" _beginthreadex &&
4528         enable w32threads || disable w32threads
4529 fi
4530
4531 # check for some common methods of building with pthread support
4532 # do this before the optional library checks as some of them require pthreads
4533 if ! disabled pthreads && ! enabled w32threads; then
4534     enable pthreads
4535     if check_func pthread_join -pthread; then
4536         add_cflags -pthread
4537         add_extralibs -pthread
4538     elif check_func pthread_join -pthreads; then
4539         add_cflags -pthreads
4540         add_extralibs -pthreads
4541     elif check_func pthread_join -lpthreadGC2; then
4542         add_extralibs -lpthreadGC2
4543     elif check_lib pthread.h pthread_join -lpthread; then
4544         :
4545     elif ! check_func pthread_join; then
4546         disable pthreads
4547     fi
4548 fi
4549
4550 enabled pthreads &&
4551     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4552
4553 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4554 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4555
4556 check_lib math.h sin -lm && LIBM="-lm"
4557 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4558
4559 atan2f_args=2
4560 ldexpf_args=2
4561 powf_args=2
4562
4563 for func in $MATH_FUNCS; do
4564     eval check_mathfunc $func \${${func}_args:-1}
4565 done
4566
4567 # these are off by default, so fail if requested and not available
4568 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4569                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4570                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4571 enabled cuda              && check_lib cuda.h cuInit -lcuda
4572 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4573 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4574 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4575 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4576 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4577 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4578 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4579 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4580 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4581                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4582                                done || die "ERROR: libgsm not found"; }
4583 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4584 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4585 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4586 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4587 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4588 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4589 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4590 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4591 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4592 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4593                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4594 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4595 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4596 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4597 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4598 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4599 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4600 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4601 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4602 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4603 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4604 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4605 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4606     enabled libvpx_vp8_decoder && {
4607         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4608             disable libvpx_vp8_decoder;
4609     }
4610     enabled libvpx_vp8_encoder && {
4611         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4612             disable libvpx_vp8_encoder;
4613     }
4614     enabled libvpx_vp9_decoder && {
4615         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4616             disable libvpx_vp9_decoder;
4617     }
4618     enabled libvpx_vp9_encoder && {
4619         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4620             disable libvpx_vp9_encoder;
4621     }
4622     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4623         die "libvpx enabled but no supported decoders found"
4624     fi
4625 }
4626 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4627 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4628 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4629                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4630                                die "ERROR: libx264 version must be >= 0.118."; } &&
4631                              { check_cpp_condition x264.h "X264_MPEG2" &&
4632                                enable libx262; }
4633 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4634                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4635                                die "ERROR: libx265 version must be >= 57."; }
4636 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4637 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4638 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4639                                 { ! enabled cross_compile && {
4640                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4641                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4642                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4643                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4644                                die "ERROR: mmal not found"; }
4645 enabled mmal && check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"
4646 enabled omx_rpi && enable omx
4647 enabled omx               && { check_header OMX_Core.h ||
4648                                 { ! enabled cross_compile && enabled omx_rpi && {
4649                                     add_cflags -isystem/opt/vc/include/IL ; }
4650                                 check_header OMX_Core.h ; } ||
4651                                die "ERROR: OpenMAX IL headers not found"; }
4652 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4653                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4654                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4655                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4656                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4657                                die "ERROR: openssl not found"; }
4658
4659 if enabled gnutls; then
4660     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4661     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4662 fi
4663
4664 # libdc1394 check
4665 if enabled libdc1394; then
4666     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4667         enable libdc1394_2; } ||
4668     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4669         enable libdc1394_1; } ||
4670     die "ERROR: No version of libdc1394 found "
4671 fi
4672
4673 if enabled nvenc; then
4674     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found."
4675     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4676     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4677         die "ERROR: NVENC API version 4 or older is not supported"
4678 fi
4679
4680 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4681     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4682     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4683     enable sdl
4684 fi
4685
4686 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4687 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4688
4689 check_header linux/fb.h
4690 check_header linux/videodev2.h
4691 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4692
4693 check_header AVFoundation/AVFoundation.h &&
4694     check_objcflags -fobjc-arc &&
4695     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4696     disable AVFoundation_AVFoundation_h
4697
4698 check_header sys/videoio.h
4699
4700 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4701 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4702 # w32api 3.12 had it defined wrong
4703 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4704
4705 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4706 { check_header dev/bktr/ioctl_meteor.h &&
4707   check_header dev/bktr/ioctl_bt848.h; } ||
4708 { check_header machine/ioctl_meteor.h &&
4709   check_header machine/ioctl_bt848.h; } ||
4710 { check_header dev/video/meteor/ioctl_meteor.h &&
4711   check_header dev/video/bktr/ioctl_bt848.h; } ||
4712 check_header dev/ic/bt8xx.h
4713
4714 check_header sndio.h
4715 check_header sys/soundcard.h
4716 check_header soundcard.h
4717
4718 enabled_any alsa_indev alsa_outdev &&
4719     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4720
4721 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4722     check_func jack_port_get_latency_range -ljack
4723
4724 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4725
4726 if enabled libcdio; then
4727     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4728     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4729     die "ERROR: No usable libcdio/cdparanoia found"
4730 fi
4731
4732 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4733
4734 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4735     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4736         enabled libxcb && die "ERROR: libxcb not found";
4737     } && disable x11grab && enable libxcb
4738
4739     disabled libxcb_shm ||
4740         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4741             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4742         } && check_header sys/shm.h && enable libxcb_shm
4743
4744     disabled libxcb_xfixes ||
4745         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4746             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4747         } && enable libxcb_xfixes
4748
4749     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4750     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4751 fi
4752
4753 if enabled x11grab; then
4754     enabled xlib || die "ERROR: Xlib not found"
4755     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4756     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4757 fi
4758
4759 enabled vaapi &&
4760     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4761     disable vaapi
4762
4763 if enabled vaapi ; then
4764     enabled xlib &&
4765     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4766     enable vaapi_x11
4767
4768     check_lib2 "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4769     enable vaapi_drm
4770 fi
4771
4772 enabled vdpau &&
4773     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4774     disable vdpau
4775
4776 enabled vdpau && enabled xlib &&
4777     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4778     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4779     enable vdpau_x11
4780
4781 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4782
4783 # add some useful compiler flags if supported
4784 check_cflags -Wdeclaration-after-statement
4785 check_cflags -Wall
4786 check_cflags -Wdisabled-optimization
4787 check_cflags -Wpointer-arith
4788 check_cflags -Wredundant-decls
4789 check_cflags -Wwrite-strings
4790 check_cflags -Wtype-limits
4791 check_cflags -Wundef
4792 check_cflags -Wmissing-prototypes
4793 check_cflags -Wstrict-prototypes
4794 enabled extra_warnings && check_cflags -Winline
4795 enabled extra_warnings && check_cflags -Wcast-qual
4796
4797 check_disable_warning(){
4798     warning_flag=-W${1#-Wno-}
4799     test_cflags $warning_flag && add_cflags $1
4800 }
4801
4802 check_disable_warning -Wno-parentheses
4803 check_disable_warning -Wno-switch
4804 check_disable_warning -Wno-format-zero-length
4805 check_disable_warning -Wno-pointer-sign
4806
4807 # add some linker flags
4808 check_ldflags -Wl,--warn-common
4809 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4810 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4811 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4812
4813 # add some strip flags
4814 # -wN '..@*' is more selective than -x, but not available everywhere.