Revert "mmaldec: autodetect by default" since it breaks linking on systems without...
[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   --enable-avisynth        enable reading of AviSynth script files [no]
189   --enable-bzlib           enable bzlib [autodetect]
190   --enable-frei0r          enable frei0r video filtering
191   --enable-gnutls          enable gnutls [no]
192   --enable-libbs2b         enable bs2b DSP library [no]
193   --enable-libcdio         enable audio CD grabbing with libcdio
194   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
195                            and libraw1394 [no]
196   --enable-libdcadec       enable DCA decoding via libdcadec [no]
197   --enable-libfaac         enable AAC encoding via libfaac [no]
198   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
199   --enable-libfreetype     enable libfreetype [no]
200   --enable-libgsm          enable GSM de/encoding via libgsm [no]
201   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
202   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
203   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
204   --enable-libnpp          enable NVIDIA Performance Primitives-based code [no]
205   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
206   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
207   --enable-libopencv       enable video filtering via libopencv [no]
208   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
209   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
210   --enable-libopus         enable Opus de/encoding via libopus [no]
211   --enable-libpulse        enable Pulseaudio input via libpulse [no]
212   --enable-librtmp         enable RTMP[E] support via librtmp [no]
213   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
214   --enable-libsnappy       enable Snappy compression [no]
215   --enable-libspeex        enable Speex de/encoding via libspeex [no]
216   --enable-libtheora       enable Theora encoding via libtheora [no]
217   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
218   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
219   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
220   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
221   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
222   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
223   --enable-libwebp         enable WebP encoding via libwebp [no]
224   --enable-libx264         enable H.264 encoding via x264 [no]
225   --enable-libx265         enable HEVC encoding via x265 [no]
226   --enable-libxavs         enable AVS encoding via xavs [no]
227   --enable-libxcb          enable X11 grabbing using XCB [no]
228   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
229   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
230   --enable-libxvid         enable Xvid encoding via xvidcore,
231                            native MPEG-4/Xvid encoder exists [no]
232   --enable-openssl         enable openssl [no]
233   --enable-x11grab         enable X11 grabbing (legacy) [no]
234   --enable-zlib            enable zlib [autodetect]
235
236 Toolchain options:
237   --arch=ARCH              select architecture [$arch]
238   --cpu=CPU                select the minimum required CPU (affects
239                            instruction selection, may crash on older CPUs)
240   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
241   --enable-cross-compile   assume a cross-compiler is used
242   --sysroot=PATH           root of cross-build tree
243   --sysinclude=PATH        location of cross-build system headers
244   --target-os=OS           compiler targets OS [$target_os]
245   --target-exec=CMD        command to run executables on target
246   --target-path=DIR        path to view of build directory on target
247   --target-samples=DIR     path to samples directory on target
248   --toolchain=NAME         set tool defaults according to NAME
249   --nm=NM                  use nm tool
250   --ar=AR                  use archive tool AR [$ar_default]
251   --as=AS                  use assembler AS [$as_default]
252   --cc=CC                  use C compiler CC [$cc_default]
253   --objcc=OCC              use ObjC compiler OCC [$cc_default]
254   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
255   --ld=LD                  use linker LD
256   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
257   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
258   --host-cc=HOSTCC         use host C compiler HOSTCC
259   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
260   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
261   --host-ld=HOSTLD         use host linker HOSTLD
262   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
263   --host-libs=HLIBS        use libs HLIBS when linking for host
264   --host-os=OS             compiler host OS [$target_os]
265   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
266   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
267   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
268   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
269   --extra-libs=ELIBS       add ELIBS [$ELIBS]
270   --extra-version=STRING   version string suffix []
271   --optflags=OPTFLAGS      override optimization-related compiler flags
272   --build-suffix=SUFFIX    library name suffix []
273   --enable-pic             build position-independent code
274   --enable-thumb           compile for Thumb instruction set
275   --enable-lto             use link-time optimization
276   --env="ENV=override"     override the environment variables
277
278 Advanced options (experts only):
279   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
280   --custom-allocator=NAME  use a supported custom allocator
281   --disable-symver         disable symbol versioning
282   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
283   --disable-safe-bitstream-reader
284                            disable buffer boundary checking in bitreaders
285                            (faster, but may crash)
286   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
287   --enable-sram            allow use of on-chip SRAM
288
289 Optimization options (experts only):
290   --disable-asm            disable all assembly optimizations
291   --disable-altivec        disable AltiVec optimizations
292   --disable-vsx            disable VSX optimizations
293   --disable-power8         disable POWER8 optimizations
294   --disable-amd3dnow       disable 3DNow! optimizations
295   --disable-amd3dnowext    disable 3DNow! extended optimizations
296   --disable-mmx            disable MMX optimizations
297   --disable-mmxext         disable MMXEXT optimizations
298   --disable-sse            disable SSE optimizations
299   --disable-sse2           disable SSE2 optimizations
300   --disable-sse3           disable SSE3 optimizations
301   --disable-ssse3          disable SSSE3 optimizations
302   --disable-sse4           disable SSE4 optimizations
303   --disable-sse42          disable SSE4.2 optimizations
304   --disable-avx            disable AVX optimizations
305   --disable-xop            disable XOP optimizations
306   --disable-fma3           disable FMA3 optimizations
307   --disable-fma4           disable FMA4 optimizations
308   --disable-avx2           disable AVX2 optimizations
309   --disable-armv5te        disable armv5te optimizations
310   --disable-armv6          disable armv6 optimizations
311   --disable-armv6t2        disable armv6t2 optimizations
312   --disable-vfp            disable VFP optimizations
313   --disable-neon           disable NEON optimizations
314   --disable-inline-asm     disable use of inline assembly
315   --disable-yasm           disable use of nasm/yasm assembly
316
317 Developer options (useful when working on Libav itself):
318   --disable-debug          disable debugging symbols
319   --enable-debug=LEVEL     set the debug level [$debuglevel]
320   --disable-optimizations  disable compiler optimizations
321   --enable-extra-warnings  enable more compiler warnings
322   --samples=PATH           location of test samples for FATE, if not set use
323                            \$LIBAV_SAMPLES at make invocation time.
324   --enable-neon-clobber-test check NEON registers for clobbering (should be
325                            used only for debugging purposes)
326   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
327                            should be used only for debugging purposes)
328   --enable-random          randomly enable/disable components
329   --disable-random
330   --enable-random=LIST     randomly enable/disable specific components or
331   --disable-random=LIST    component groups. LIST is a comma-separated list
332                            of NAME[:PROB] entries where NAME is a component
333                            (group) and PROB the probability associated with
334                            NAME (default 0.5).
335   --random-seed=VALUE      seed value for --enable/disable-random
336   --disable-valgrind-backtrace do not print a backtrace under Valgrind
337                            (only applies to --disable-optimizations builds)
338
339 NOTE: Object files are built at the place where configure is launched.
340 EOF
341   exit 0
342 }
343
344 quotes='""'
345
346 log(){
347     echo "$@" >> $logfile
348 }
349
350 log_file(){
351     log BEGIN $1
352     i=1
353     while read line; do
354         printf '%5s   %s\n' "${i}" "${line}"
355         i=$(($i+1))
356     done < $1 >> $logfile
357     log END $1
358 }
359
360 echolog(){
361     log "$@"
362     echo "$@"
363 }
364
365 warn(){
366     log "WARNING: $*"
367     WARNINGS="${WARNINGS}WARNING: $*\n"
368 }
369
370 die(){
371     echolog "$@"
372     cat <<EOF
373
374 If you think configure made a mistake, make sure you are using the latest
375 version from Git.  If the latest version fails, report the problem to the
376 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
377 EOF
378     if disabled logging; then
379         cat <<EOF
380 Rerun configure with logging enabled (do not use --disable-logging), and
381 include the log this produces with your report.
382 EOF
383     else
384         cat <<EOF
385 Include the log file "$logfile" produced by configure as this will help
386 solving the problem.
387 EOF
388     fi
389     exit 1
390 }
391
392 # Avoid locale weirdness, besides we really just want to translate ASCII.
393 toupper(){
394     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
395 }
396
397 tolower(){
398     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
399 }
400
401 c_escape(){
402     echo "$*" | sed 's/["\\]/\\\0/g'
403 }
404
405 sh_quote(){
406     v=$(echo "$1" | sed "s/'/'\\\\''/g")
407     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
408     echo "$v"
409 }
410
411 cleanws(){
412     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
413 }
414
415 filter(){
416     pat=$1
417     shift
418     for v; do
419         eval "case $v in $pat) echo $v ;; esac"
420     done
421 }
422
423 filter_out(){
424     pat=$1
425     shift
426     for v; do
427         eval "case $v in $pat) ;; *) echo $v ;; esac"
428     done
429 }
430
431 map(){
432     m=$1
433     shift
434     for v; do eval $m; done
435 }
436
437 add_suffix(){
438     suffix=$1
439     shift
440     for v; do echo ${v}${suffix}; done
441 }
442
443 set_all(){
444     value=$1
445     shift
446     for var in $*; do
447         eval $var=$value
448     done
449 }
450
451 set_weak(){
452     value=$1
453     shift
454     for var; do
455         eval : \${$var:=$value}
456     done
457 }
458
459 sanitize_var_name(){
460     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
461 }
462
463 set_safe(){
464     var=$1
465     shift
466     eval $(sanitize_var_name "$var")='$*'
467 }
468
469 get_safe(){
470     eval echo \$$(sanitize_var_name "$1")
471 }
472
473 pushvar(){
474     for pvar in $*; do
475         eval level=\${${pvar}_level:=0}
476         eval ${pvar}_${level}="\$$pvar"
477         eval ${pvar}_level=$(($level+1))
478     done
479 }
480
481 popvar(){
482     for pvar in $*; do
483         eval level=\${${pvar}_level:-0}
484         test $level = 0 && continue
485         eval level=$(($level-1))
486         eval $pvar="\${${pvar}_${level}}"
487         eval ${pvar}_level=$level
488         eval unset ${pvar}_${level}
489     done
490 }
491
492 enable(){
493     set_all yes $*
494 }
495
496 disable(){
497     set_all no $*
498 }
499
500 enable_weak(){
501     set_weak yes $*
502 }
503
504 disable_weak(){
505     set_weak no $*
506 }
507
508 enable_safe(){
509     for var; do
510         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
511     done
512 }
513
514 disable_safe(){
515     for var; do
516         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
517     done
518 }
519
520 do_enable_deep(){
521     for var; do
522         enabled $var && continue
523         eval sel="\$${var}_select"
524         eval sgs="\$${var}_suggest"
525         pushvar var sgs
526         enable_deep $sel
527         popvar sgs
528         enable_deep_weak $sgs
529         popvar var
530     done
531 }
532
533 enable_deep(){
534     do_enable_deep $*
535     enable $*
536 }
537
538 enable_deep_weak(){
539     for var; do
540         disabled $var && continue
541         pushvar var
542         do_enable_deep $var
543         popvar var
544         enable_weak $var
545     done
546 }
547
548 enabled(){
549     test "${1#!}" = "$1" && op== || op=!=
550     eval test "x\$${1#!}" $op "xyes"
551 }
552
553 disabled(){
554     test "${1#!}" = "$1" && op== || op=!=
555     eval test "x\$${1#!}" $op "xno"
556 }
557
558 enabled_all(){
559     for opt; do
560         enabled $opt || return 1
561     done
562 }
563
564 disabled_all(){
565     for opt; do
566         disabled $opt || return 1
567     done
568 }
569
570 enabled_any(){
571     for opt; do
572         enabled $opt && return 0
573     done
574 }
575
576 disabled_any(){
577     for opt; do
578         disabled $opt && return 0
579     done
580     return 1
581 }
582
583 set_default(){
584     for opt; do
585         eval : \${$opt:=\$${opt}_default}
586     done
587 }
588
589 is_in(){
590     value=$1
591     shift
592     for var in $*; do
593         [ $var = $value ] && return 0
594     done
595     return 1
596 }
597
598 do_check_deps(){
599     for cfg; do
600         cfg="${cfg#!}"
601         enabled ${cfg}_checking && die "Circular dependency for $cfg."
602         disabled ${cfg}_checking && continue
603         enable ${cfg}_checking
604         append allopts $cfg
605
606         eval dep_all="\$${cfg}_deps"
607         eval dep_any="\$${cfg}_deps_any"
608         eval dep_sel="\$${cfg}_select"
609         eval dep_sgs="\$${cfg}_suggest"
610         eval dep_ifa="\$${cfg}_if"
611         eval dep_ifn="\$${cfg}_if_any"
612
613         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
614         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
615         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
616
617         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
618         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
619         enabled_all  $dep_all || disable $cfg
620         enabled_any  $dep_any || disable $cfg
621         disabled_any $dep_sel && disable $cfg
622
623         if enabled $cfg; then
624             enable_deep $dep_sel
625             enable_deep_weak $dep_sgs
626         fi
627
628         disable ${cfg}_checking
629     done
630 }
631
632 check_deps(){
633     unset allopts
634
635     do_check_deps "$@"
636
637     for cfg in $allopts; do
638         enabled $cfg || continue
639         eval dep_extralibs="\$${cfg}_extralibs"
640         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
641     done
642 }
643
644 print_config(){
645     pfx=$1
646     files=$2
647     shift 2
648     map 'eval echo "$v \${$v:-no}"' "$@" |
649     awk "BEGIN { split(\"$files\", files) }
650         {
651             c = \"$pfx\" toupper(\$1);
652             v = \$2;
653             sub(/yes/, 1, v);
654             sub(/no/,  0, v);
655             for (f in files) {
656                 file = files[f];
657                 if (file ~ /\\.h\$/) {
658                     printf(\"#define %s %d\\n\", c, v) >>file;
659                 } else if (file ~ /\\.asm\$/) {
660                     printf(\"%%define %s %d\\n\", c, v) >>file;
661                 } else if (file ~ /\\.mak\$/) {
662                     n = -v ? \"\" : \"!\";
663                     printf(\"%s%s=yes\\n\", n, c) >>file;
664                 }
665             }
666         }"
667 }
668
669 print_enabled(){
670     suf=$1
671     shift
672     for v; do
673         enabled $v && printf "%s\n" ${v%$suf}
674     done
675 }
676
677 append(){
678     var=$1
679     shift
680     eval "$var=\"\$$var $*\""
681 }
682
683 prepend(){
684     var=$1
685     shift
686     eval "$var=\"$* \$$var\""
687 }
688
689 unique(){
690     var=$1
691     uniq_list=""
692     for tok in $(eval echo \$$var); do
693         uniq_list="$(filter_out $tok $uniq_list) $tok"
694     done
695     eval "$var=\"${uniq_list}\""
696 }
697
698 add_cppflags(){
699     append CPPFLAGS "$@"
700 }
701
702 add_cflags(){
703     append CFLAGS $($cflags_filter "$@")
704 }
705
706 add_asflags(){
707     append ASFLAGS $($asflags_filter "$@")
708 }
709
710 add_objcflags(){
711     append OBJCFLAGS $($objcflags_filter "$@")
712 }
713
714 add_ldflags(){
715     append LDFLAGS $($ldflags_filter "$@")
716 }
717
718 add_ldexeflags(){
719     append LDEXEFLAGS $($ldflags_filter "$@")
720 }
721
722 add_stripflags(){
723     append STRIPFLAGS "$@"
724 }
725
726 add_extralibs(){
727     prepend extralibs $($ldflags_filter "$@")
728 }
729
730 add_host_cppflags(){
731     append host_cppflags "$@"
732 }
733
734 add_host_cflags(){
735     append host_cflags $($host_cflags_filter "$@")
736 }
737
738 add_host_ldflags(){
739     append host_ldflags $($host_ldflags_filter "$@")
740 }
741
742 add_compat(){
743     append compat_objs $1
744     shift
745     map 'add_cppflags -D$v' "$@"
746 }
747
748 check_cmd(){
749     log "$@"
750     "$@" >> $logfile 2>&1
751 }
752
753 cc_o(){
754     eval printf '%s\\n' $CC_O
755 }
756
757 cc_e(){
758     eval printf '%s\\n' $CC_E
759 }
760
761 check_cc(){
762     log check_cc "$@"
763     cat > $TMPC
764     log_file $TMPC
765     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
766 }
767
768 check_objcc(){
769     log check_objcc "$@"
770     cat > $TMPC
771     log_file $TMPC
772     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
773 }
774
775 check_cpp(){
776     log check_cpp "$@"
777     cat > $TMPC
778     log_file $TMPC
779     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
780 }
781
782 as_o(){
783     eval printf '%s\\n' $AS_O
784 }
785
786 check_as(){
787     log check_as "$@"
788     cat > $TMPS
789     log_file $TMPS
790     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
791 }
792
793 check_inline_asm(){
794     log check_inline_asm "$@"
795     name="$1"
796     code="$2"
797     shift 2
798     disable $name
799     check_cc "$@" <<EOF && enable $name
800 void foo(void){ __asm__ volatile($code); }
801 EOF
802 }
803
804 check_insn(){
805     log check_insn "$@"
806     check_inline_asm ${1}_inline "\"$2\""
807     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
808 }
809
810 check_yasm(){
811     log check_yasm "$@"
812     echo "$1" > $TMPS
813     log_file $TMPS
814     shift 1
815     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
816 }
817
818 ld_o(){
819     eval printf '%s\\n' $LD_O
820 }
821
822 check_ld(){
823     log check_ld "$@"
824     flags=$(filter_out '-l*' "$@")
825     libs=$(filter '-l*' "$@")
826     check_cc $($cflags_filter $flags) || return
827     flags=$($ldflags_filter $flags)
828     libs=$($ldflags_filter $libs)
829     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
830 }
831
832 print_include(){
833     hdr=$1
834     test "${hdr%.h}" = "${hdr}" &&
835         echo "#include $hdr"    ||
836         echo "#include <$hdr>"
837 }
838
839 check_code(){
840     log check_code "$@"
841     check=$1
842     headers=$2
843     code=$3
844     shift 3
845     {
846         for hdr in $headers; do
847             print_include $hdr
848         done
849         echo "int main(void) { $code; return 0; }"
850     } | check_$check "$@"
851 }
852
853 check_cppflags(){
854     log check_cppflags "$@"
855     check_cc "$@" <<EOF && append CPPFLAGS "$@"
856 int x;
857 EOF
858 }
859
860 test_cflags(){
861     log test_cflags "$@"
862     set -- $($cflags_filter "$@")
863     check_cc "$@" <<EOF
864 int x;
865 EOF
866 }
867
868 check_cflags(){
869     log check_cflags "$@"
870     test_cflags "$@" && add_cflags "$@"
871 }
872
873 test_objcflags(){
874     log test_cflags "$@"
875     set -- $($cflags_filter "$@")
876     check_objcc "$@" <<EOF
877 int x;
878 EOF
879 }
880
881 check_objcflags(){
882     log check_cflags "$@"
883     test_objcflags "$@" && add_objcflags "$@"
884 }
885
886 test_ldflags(){
887     log test_ldflags "$@"
888     check_ld "$@" <<EOF
889 int main(void){ return 0; }
890 EOF
891 }
892
893 check_ldflags(){
894     log check_ldflags "$@"
895     test_ldflags "$@" && add_ldflags "$@"
896 }
897
898 test_stripflags(){
899     log test_stripflags "$@"
900     # call check_cc to get a fresh TMPO
901     check_cc <<EOF
902 int main(void) { return 0; }
903 EOF
904     check_cmd $strip $STRIPFLAGS "$@" $TMPO
905 }
906
907 check_stripflags(){
908     log check_stripflags "$@"
909     test_stripflags "$@" && add_stripflags "$@"
910 }
911
912 check_header(){
913     log check_header "$@"
914     header=$1
915     shift
916     disable_safe $header
917     check_cpp "$@" <<EOF && enable_safe $header
918 #include <$header>
919 int x;
920 EOF
921 }
922
923 check_func(){
924     log check_func "$@"
925     func=$1
926     shift
927     disable $func
928     check_ld "$@" <<EOF && enable $func
929 extern int $func();
930 int main(void){ $func(); }
931 EOF
932 }
933
934 check_mathfunc(){
935     log check_mathfunc "$@"
936     func=$1
937     narg=$2
938     shift 2
939     test $narg = 2 && args="f, g" || args="f"
940     disable $func
941     check_ld "$@" <<EOF && enable $func
942 #include <math.h>
943 float foo(float f, float g) { return $func($args); }
944 int main(void){ return 0; }
945 EOF
946 }
947
948 check_func_headers(){
949     log check_func_headers "$@"
950     headers=$1
951     funcs=$2
952     shift 2
953     {
954         for hdr in $headers; do
955             print_include $hdr
956         done
957         for func in $funcs; do
958             echo "long check_$func(void) { return (long) $func; }"
959         done
960         echo "int main(void) { return 0; }"
961     } | check_ld "$@" && enable $funcs && enable_safe $headers
962 }
963
964 check_cpp_condition(){
965     log check_cpp_condition "$@"
966     header=$1
967     condition=$2
968     shift 2
969     check_cpp "$@" <<EOF
970 #include <$header>
971 #if !($condition)
972 #error "unsatisfied condition: $condition"
973 #endif
974 EOF
975 }
976
977 check_lib(){
978     log check_lib "$@"
979     header="$1"
980     func="$2"
981     shift 2
982     check_header $header && check_func $func "$@" && add_extralibs "$@"
983 }
984
985 check_lib2(){
986     log check_lib2 "$@"
987     headers="$1"
988     funcs="$2"
989     shift 2
990     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
991 }
992
993 check_pkg_config(){
994     log check_pkg_config "$@"
995     pkg="$1"
996     headers="$2"
997     funcs="$3"
998     shift 3
999     check_cmd $pkg_config --exists --print-errors $pkg || return
1000     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1001     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1002     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1003         set_safe "${pkg}_cflags" $pkg_cflags   &&
1004         set_safe "${pkg}_libs"   $pkg_libs
1005 }
1006
1007 check_exec(){
1008     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1009 }
1010
1011 check_exec_crash(){
1012     code=$(cat)
1013
1014     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1015     # are safe but may not be available everywhere.  Thus we use
1016     # raise(SIGTERM) instead.  The check is run in a subshell so we
1017     # can redirect the "Terminated" message from the shell.  SIGBUS
1018     # is not defined by standard C so it is used conditionally.
1019
1020     (check_exec "$@") >> $logfile 2>&1 <<EOF
1021 #include <signal.h>
1022 static void sighandler(int sig){
1023     raise(SIGTERM);
1024 }
1025 int foo(void){
1026     $code
1027 }
1028 int (*func_ptr)(void) = foo;
1029 int main(void){
1030     signal(SIGILL, sighandler);
1031     signal(SIGFPE, sighandler);
1032     signal(SIGSEGV, sighandler);
1033 #ifdef SIGBUS
1034     signal(SIGBUS, sighandler);
1035 #endif
1036     return func_ptr();
1037 }
1038 EOF
1039 }
1040
1041 check_type(){
1042     log check_type "$@"
1043     headers=$1
1044     type=$2
1045     shift 2
1046     disable_safe "$type"
1047     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1048 }
1049
1050 check_struct(){
1051     log check_struct "$@"
1052     headers=$1
1053     struct=$2
1054     member=$3
1055     shift 3
1056     disable_safe "${struct}_${member}"
1057     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1058         enable_safe "${struct}_${member}"
1059 }
1060
1061 check_builtin(){
1062     log check_builtin "$@"
1063     name=$1
1064     headers=$2
1065     builtin=$3
1066     shift 3
1067     disable "$name"
1068     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1069 }
1070
1071 check_compile_assert(){
1072     log check_compile_assert "$@"
1073     name=$1
1074     headers=$2
1075     condition=$3
1076     shift 3
1077     disable "$name"
1078     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1079 }
1080
1081 require(){
1082     name="$1"
1083     header="$2"
1084     func="$3"
1085     shift 3
1086     check_lib $header $func "$@" || die "ERROR: $name not found"
1087 }
1088
1089 require2(){
1090     name="$1"
1091     headers="$2"
1092     func="$3"
1093     shift 3
1094     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1095 }
1096
1097 require_pkg_config(){
1098     pkg="$1"
1099     check_pkg_config "$@" || die "ERROR: $pkg not found"
1100     add_cflags    $(get_safe "${pkg}_cflags")
1101     add_extralibs $(get_safe "${pkg}_libs")
1102 }
1103
1104 hostcc_e(){
1105     eval printf '%s\\n' $HOSTCC_E
1106 }
1107
1108 hostcc_o(){
1109     eval printf '%s\\n' $HOSTCC_O
1110 }
1111
1112 check_host_cc(){
1113     log check_host_cc "$@"
1114     cat > $TMPC
1115     log_file $TMPC
1116     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1117 }
1118
1119 check_host_cpp(){
1120     log check_host_cpp "$@"
1121     cat > $TMPC
1122     log_file $TMPC
1123     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1124 }
1125
1126 check_host_cppflags(){
1127     log check_host_cppflags "$@"
1128     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1129 int x;
1130 EOF
1131 }
1132
1133 check_host_cflags(){
1134     log check_host_cflags "$@"
1135     set -- $($host_cflags_filter "$@")
1136     check_host_cc "$@" <<EOF && append host_cflags "$@"
1137 int x;
1138 EOF
1139 }
1140
1141 check_host_cpp_condition(){
1142     log check_host_cpp_condition "$@"
1143     header=$1
1144     condition=$2
1145     shift 2
1146     check_host_cpp "$@" <<EOF
1147 #include <$header>
1148 #if !($condition)
1149 #error "unsatisfied condition: $condition"
1150 #endif
1151 EOF
1152 }
1153
1154 apply(){
1155     file=$1
1156     shift
1157     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1158 }
1159
1160 cp_if_changed(){
1161     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1162     mkdir -p "$(dirname $2)"
1163     $cp_f "$1" "$2"
1164 }
1165
1166 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1167 # system-dependent things.
1168
1169 AVCODEC_COMPONENTS="
1170     bsfs
1171     decoders
1172     encoders
1173     hwaccels
1174     parsers
1175 "
1176
1177 AVDEVICE_COMPONENTS="
1178     indevs
1179     outdevs
1180 "
1181 AVFILTER_COMPONENTS="
1182     filters
1183 "
1184 AVFORMAT_COMPONENTS="
1185     demuxers
1186     muxers
1187     protocols
1188 "
1189
1190 AVRESAMPLE_COMPONENTS=""
1191 AVUTIL_COMPONENTS=""
1192
1193 COMPONENT_LIST="
1194     $AVCODEC_COMPONENTS
1195     $AVDEVICE_COMPONENTS
1196     $AVFILTER_COMPONENTS
1197     $AVFORMAT_COMPONENTS
1198     $AVRESAMPLE_COMPONENTS
1199     $AVUTIL_COMPONENTS
1200 "
1201
1202 EXAMPLE_LIST="
1203     avcodec_example
1204     filter_audio_example
1205     metadata_example
1206     output_example
1207     qsvdec_example
1208     transcode_aac_example
1209 "
1210
1211 EXTERNAL_LIBRARY_LIST="
1212     avisynth
1213     bzlib
1214     frei0r
1215     gnutls
1216     libbs2b
1217     libcdio
1218     libdc1394
1219     libdcadec
1220     libfaac
1221     libfdk_aac
1222     libfontconfig
1223     libfreetype
1224     libgsm
1225     libilbc
1226     libkvazaar
1227     libmp3lame
1228     libnpp
1229     libopencore_amrnb
1230     libopencore_amrwb
1231     libopencv
1232     libopenh264
1233     libopenjpeg
1234     libopus
1235     libpulse
1236     librtmp
1237     libschroedinger
1238     libsnappy
1239     libspeex
1240     libtheora
1241     libtwolame
1242     libvo_aacenc
1243     libvo_amrwbenc
1244     libvorbis
1245     libvpx
1246     libwavpack
1247     libwebp
1248     libx264
1249     libx265
1250     libxavs
1251     libxcb
1252     libxcb_shm
1253     libxcb_xfixes
1254     libxvid
1255     openssl
1256     x11grab
1257     zlib
1258 "
1259
1260 FEATURE_LIST="
1261     gray
1262     hardcoded_tables
1263     omx_rpi
1264     runtime_cpudetect
1265     safe_bitstream_reader
1266     shared
1267     small
1268     sram
1269     static
1270     swscale_alpha
1271 "
1272
1273 HW_CODECS_LIST="
1274     cuda
1275     libmfx
1276     mmal
1277     nvenc
1278     omx
1279 "
1280
1281 HWACCEL_LIST="
1282     d3d11va
1283     dxva2
1284     vaapi
1285     vda
1286     vdpau
1287 "
1288
1289 LIBRARY_LIST="
1290     avcodec
1291     avdevice
1292     avfilter
1293     avformat
1294     avresample
1295     avutil
1296     swscale
1297 "
1298
1299 LICENSE_LIST="
1300     gpl
1301     nonfree
1302     version3
1303 "
1304
1305 PROGRAM_LIST="
1306     avconv
1307     avplay
1308     avprobe
1309 "
1310
1311 SUBSYSTEM_LIST="
1312     dct
1313     doc
1314     error_resilience
1315     faan
1316     fft
1317     lsp
1318     lzo
1319     mdct
1320     network
1321     rdft
1322 "
1323
1324 CONFIG_LIST="
1325     $COMPONENT_LIST
1326     $EXAMPLE_LIST
1327     $EXTERNAL_LIBRARY_LIST
1328     $FEATURE_LIST
1329     $HW_CODECS_LIST
1330     $HWACCEL_LIST
1331     $LICENSE_LIST
1332     $LIBRARY_LIST
1333     $PROGRAM_LIST
1334     $SUBSYSTEM_LIST
1335     memalign_hack
1336     neon_clobber_test
1337     pic
1338     pod2man
1339     texi2html
1340     thumb
1341     valgrind_backtrace
1342     xmm_clobber_test
1343 "
1344
1345 THREADS_LIST="
1346     pthreads
1347     w32threads
1348 "
1349
1350 ATOMICS_LIST="
1351     atomics_gcc
1352     atomics_suncc
1353     atomics_win32
1354 "
1355
1356 ARCH_LIST="
1357     aarch64
1358     alpha
1359     arm
1360     avr32
1361     avr32_ap
1362     avr32_uc
1363     bfin
1364     ia64
1365     m68k
1366     mips
1367     mips64
1368     parisc
1369     ppc
1370     ppc64
1371     s390
1372     sh4
1373     sparc
1374     sparc64
1375     tilegx
1376     tilepro
1377     tomi
1378     x86
1379     x86_32
1380     x86_64
1381 "
1382
1383 ARCH_EXT_LIST_ARM="
1384     armv5te
1385     armv6
1386     armv6t2
1387     armv8
1388     neon
1389     vfp
1390     vfpv3
1391 "
1392
1393 ARCH_EXT_LIST_X86_SIMD="
1394     amd3dnow
1395     amd3dnowext
1396     avx
1397     avx2
1398     fma3
1399     fma4
1400     mmx
1401     mmxext
1402     sse
1403     sse2
1404     sse3
1405     sse4
1406     sse42
1407     ssse3
1408     xop
1409 "
1410
1411 ARCH_EXT_LIST_PPC="
1412     altivec
1413     dcbzl
1414     ldbrx
1415     power8
1416     ppc4xx
1417     vsx
1418 "
1419
1420 ARCH_EXT_LIST_X86="
1421     $ARCH_EXT_LIST_X86_SIMD
1422     cpunop
1423     i686
1424 "
1425
1426 ARCH_EXT_LIST_MIPS="
1427     loongson
1428     mips32r1
1429     mips64r1
1430     mips32r2
1431     mips64r2
1432     mips32r6
1433     mips64r6
1434 "
1435
1436 ARCH_EXT_LIST="
1437     $ARCH_EXT_LIST_ARM
1438     $ARCH_EXT_LIST_MIPS
1439     $ARCH_EXT_LIST_PPC
1440     $ARCH_EXT_LIST_X86
1441     vis
1442 "
1443
1444 ARCH_FEATURES="
1445     aligned_stack
1446     fast_64bit
1447     fast_clz
1448     fast_cmov
1449     local_aligned_8
1450     local_aligned_16
1451     simd_align_16
1452 "
1453
1454 BUILTIN_LIST="
1455     atomic_cas_ptr
1456     machine_rw_barrier
1457     MemoryBarrier
1458     mm_empty
1459     rdtsc
1460     sem_timedwait
1461     sync_val_compare_and_swap
1462 "
1463 HAVE_LIST_CMDLINE="
1464     inline_asm
1465     symver
1466     yasm
1467 "
1468
1469 HAVE_LIST_PUB="
1470     bigendian
1471     fast_unaligned
1472 "
1473
1474 HEADERS_LIST="
1475     AVFoundation_AVFoundation_h
1476     alsa_asoundlib_h
1477     altivec_h
1478     arpa_inet_h
1479     cdio_paranoia_h
1480     cdio_paranoia_paranoia_h
1481     dispatch_dispatch_h
1482     dev_bktr_ioctl_bt848_h
1483     dev_bktr_ioctl_meteor_h
1484     dev_ic_bt8xx_h
1485     dev_video_bktr_ioctl_bt848_h
1486     dev_video_meteor_ioctl_meteor_h
1487     direct_h
1488     dlfcn_h
1489     d3d11_h
1490     dxva_h
1491     gsm_h
1492     io_h
1493     mach_mach_time_h
1494     machine_ioctl_bt848_h
1495     machine_ioctl_meteor_h
1496     malloc_h
1497     poll_h
1498     sndio_h
1499     soundcard_h
1500     sys_mman_h
1501     sys_param_h
1502     sys_resource_h
1503     sys_select_h
1504     sys_soundcard_h
1505     sys_time_h
1506     sys_un_h
1507     sys_videoio_h
1508     unistd_h
1509     valgrind_valgrind_h
1510     windows_h
1511     winsock2_h
1512 "
1513
1514 INTRINSICS_LIST="
1515     intrinsics_neon
1516 "
1517
1518 MATH_FUNCS="
1519     atanf
1520     atan2f
1521     cbrtf
1522     cosf
1523     exp2
1524     exp2f
1525     expf
1526     isinf
1527     isnan
1528     ldexpf
1529     llrint
1530     llrintf
1531     log2
1532     log2f
1533     log10f
1534     lrint
1535     lrintf
1536     powf
1537     rint
1538     round
1539     roundf
1540     sinf
1541     trunc
1542     truncf
1543 "
1544
1545 SYSTEM_FUNCS="
1546     aligned_malloc
1547     clock_gettime
1548     closesocket
1549     CommandLineToArgvW
1550     CoTaskMemFree
1551     CryptGenRandom
1552     dlopen
1553     fcntl
1554     flt_lim
1555     fork
1556     getaddrinfo
1557     gethrtime
1558     getopt
1559     GetProcessAffinityMask
1560     GetProcessMemoryInfo
1561     GetProcessTimes
1562     getrusage
1563     GetSystemTimeAsFileTime
1564     gettimeofday
1565     gmtime_r
1566     inet_aton
1567     isatty
1568     jack_port_get_latency_range
1569     LoadLibrary
1570     localtime_r
1571     mach_absolute_time
1572     MapViewOfFile
1573     memalign
1574     mkstemp
1575     mmap
1576     mprotect
1577     nanosleep
1578     posix_memalign
1579     sched_getaffinity
1580     SetConsoleTextAttribute
1581     setmode
1582     setrlimit
1583     Sleep
1584     strerror_r
1585     sysconf
1586     sysctl
1587     usleep
1588     VirtualAlloc
1589 "
1590
1591 TOOLCHAIN_FEATURES="
1592     as_dn_directive
1593     as_func
1594     as_object_arch
1595     asm_mod_q
1596     attribute_may_alias
1597     attribute_packed
1598     ebp_available
1599     ebx_available
1600     gnu_as
1601     ibm_asm
1602     inline_asm_labels
1603     pragma_deprecated
1604     symver_asm_label
1605     symver_gnu_asm
1606     vfp_args
1607     xform_asm
1608     xmm_clobbers
1609 "
1610
1611 TYPES_LIST="
1612     CONDITION_VARIABLE_Ptr
1613     socklen_t
1614     struct_addrinfo
1615     struct_group_source_req
1616     struct_ip_mreq_source
1617     struct_ipv6_mreq
1618     struct_pollfd
1619     struct_rusage_ru_maxrss
1620     struct_sockaddr_in6
1621     struct_sockaddr_sa_len
1622     struct_sockaddr_storage
1623     struct_v4l2_frmivalenum_discrete
1624 "
1625
1626 HAVE_LIST="
1627     $ARCH_EXT_LIST
1628     $(add_suffix _external $ARCH_EXT_LIST)
1629     $(add_suffix _inline   $ARCH_EXT_LIST)
1630     $ARCH_FEATURES
1631     $ATOMICS_LIST
1632     $BUILTIN_LIST
1633     $HAVE_LIST_CMDLINE
1634     $HAVE_LIST_PUB
1635     $HEADERS_LIST
1636     $INTRINSICS_LIST
1637     $MATH_FUNCS
1638     $SYSTEM_FUNCS
1639     $THREADS_LIST
1640     $TOOLCHAIN_FEATURES
1641     $TYPES_LIST
1642     atomics_native
1643     dos_paths
1644     dxva2_lib
1645     libc_msvcrt
1646     libdc1394_1
1647     libdc1394_2
1648     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1649     sdl
1650     section_data_rel_ro
1651     threads
1652     vaapi_drm
1653     vaapi_x11
1654     vdpau_x11
1655     xlib
1656 "
1657
1658 # options emitted with CONFIG_ prefix but not available on the command line
1659 CONFIG_EXTRA="
1660     aandcttables
1661     ac3dsp
1662     audio_frame_queue
1663     audiodsp
1664     blockdsp
1665     bswapdsp
1666     cabac
1667     dirac_parse
1668     dvprofile
1669     faandct
1670     faanidct
1671     fdctdsp
1672     flacdsp
1673     fmtconvert
1674     g722dsp
1675     gcrypt
1676     gmp
1677     golomb
1678     gplv3
1679     h263dsp
1680     h264chroma
1681     h264dsp
1682     h264pred
1683     h264qpel
1684     hpeldsp
1685     huffman
1686     huffyuvdsp
1687     huffyuvencdsp
1688     idctdsp
1689     iirfilter
1690     imdct15
1691     intrax8
1692     iso_media
1693     ividsp
1694     jpegtables
1695     libx262
1696     lgplv3
1697     lpc
1698     lzf
1699     me_cmp
1700     mpeg_er
1701     mpegaudio
1702     mpegaudiodsp
1703     mpegvideo
1704     mpegvideoenc
1705     mss34dsp
1706     pixblockdsp
1707     qpeldsp
1708     qsv
1709     qsvdec
1710     qsvenc
1711     rangecoder
1712     riffdec
1713     riffenc
1714     rtpdec
1715     rtpenc_chain
1716     rv34dsp
1717     sinewin
1718     snappy
1719     srtp
1720     startcode
1721     texturedsp
1722     texturedspenc
1723     tpeldsp
1724     vaapi_encode
1725     vc1dsp
1726     videodsp
1727     vp3dsp
1728     vp56dsp
1729     vp8dsp
1730     wma_freqs
1731     wmv2dsp
1732 "
1733
1734 CMDLINE_SELECT="
1735     $ARCH_EXT_LIST
1736     $CONFIG_LIST
1737     $HAVE_LIST_CMDLINE
1738     $THREADS_LIST
1739     asm
1740     cross_compile
1741     debug
1742     extra_warnings
1743     logging
1744     lto
1745     optimizations
1746     rpath
1747 "
1748
1749 PATHS_LIST="
1750     bindir
1751     datadir
1752     docdir
1753     incdir
1754     libdir
1755     mandir
1756     prefix
1757     shlibdir
1758 "
1759
1760 CMDLINE_SET="
1761     $PATHS_LIST
1762     ar
1763     arch
1764     as
1765     build_suffix
1766     cc
1767     objcc
1768     cpu
1769     cross_prefix
1770     custom_allocator
1771     dep_cc
1772     env
1773     extra_version
1774     host_cc
1775     host_cflags
1776     host_ld
1777     host_ldflags
1778     host_libs
1779     host_os
1780     ld
1781     logfile
1782     malloc_prefix
1783     nm
1784     optflags
1785     pkg_config
1786     pkg_config_flags
1787     random_seed
1788     samples
1789     sysinclude
1790     sysroot
1791     target_exec
1792     target_os
1793     target_path
1794     target_samples
1795     toolchain
1796 "
1797
1798 CMDLINE_APPEND="
1799     extra_cflags
1800     extra_objcflags
1801     host_cppflags
1802 "
1803
1804 # code dependency declarations
1805
1806 # architecture extensions
1807
1808 armv5te_deps="arm"
1809 armv6_deps="arm"
1810 armv6t2_deps="arm"
1811 armv8_deps="aarch64"
1812 neon_deps_any="aarch64 arm"
1813 intrinsics_neon_deps="neon"
1814 vfp_deps_any="aarch64 arm"
1815 vfpv3_deps="vfp"
1816
1817 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1818
1819 altivec_deps="ppc"
1820 ppc4xx_deps="ppc"
1821 vsx_deps="altivec"
1822 power8_deps="vsx"
1823
1824 cpunop_deps="i686"
1825 x86_64_select="i686"
1826 x86_64_suggest="fast_cmov"
1827
1828 amd3dnow_deps="mmx"
1829 amd3dnowext_deps="amd3dnow"
1830 i686_deps="x86"
1831 mmx_deps="x86"
1832 mmxext_deps="mmx"
1833 sse_deps="mmxext"
1834 sse2_deps="sse"
1835 sse3_deps="sse2"
1836 ssse3_deps="sse3"
1837 sse4_deps="ssse3"
1838 sse42_deps="sse4"
1839 avx_deps="sse42"
1840 xop_deps="avx"
1841 fma3_deps="avx"
1842 fma4_deps="avx"
1843 avx2_deps="avx"
1844
1845 mmx_external_deps="yasm"
1846 mmx_inline_deps="inline_asm"
1847 mmx_suggest="mmx_external mmx_inline"
1848
1849 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1850     eval dep=\$${ext}_deps
1851     eval ${ext}_external_deps='"${dep}_external"'
1852     eval ${ext}_inline_deps='"${dep}_inline"'
1853     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1854 done
1855
1856 aligned_stack_if_any="aarch64 ppc x86"
1857 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1858 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1859 fast_unaligned_if_any="aarch64 ppc x86"
1860 simd_align_16_if_any="altivec neon sse"
1861
1862 # system capabilities
1863 symver_if_any="symver_asm_label symver_gnu_asm"
1864 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1865
1866 # threading support
1867 atomics_gcc_if="sync_val_compare_and_swap"
1868 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1869 atomics_win32_if="MemoryBarrier"
1870 atomics_native_if_any="$ATOMICS_LIST"
1871 w32threads_deps="atomics_native"
1872 threads_if_any="$THREADS_LIST"
1873
1874 # subsystems
1875 dct_select="rdft"
1876 dirac_parse_select="golomb"
1877 error_resilience_select="me_cmp"
1878 faandct_deps="faan fdctdsp"
1879 faanidct_deps="faan idctdsp"
1880 h264dsp_select="startcode"
1881 intrax8_select="blockdsp idctdsp"
1882 mdct_select="fft"
1883 rdft_select="fft"
1884 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1885 mpeg_er_select="error_resilience"
1886 mpegaudio_select="mpegaudiodsp"
1887 mpegaudiodsp_select="dct"
1888 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1889 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1890 vc1dsp_select="h264chroma qpeldsp startcode"
1891
1892 # decoders / encoders
1893 aac_decoder_select="imdct15 mdct sinewin"
1894 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1895 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1896 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1897 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1898 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1899 adpcm_g722_decoder_select="g722dsp"
1900 adpcm_g722_encoder_select="g722dsp"
1901 aic_decoder_select="golomb idctdsp"
1902 alac_encoder_select="lpc"
1903 als_decoder_select="bswapdsp"
1904 amrnb_decoder_select="lsp"
1905 amrwb_decoder_select="lsp"
1906 amv_decoder_select="sp5x_decoder"
1907 ape_decoder_select="bswapdsp"
1908 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1909 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1910 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1911 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1912 atrac1_decoder_select="mdct sinewin"
1913 atrac3_decoder_select="mdct"
1914 atrac3p_decoder_select="mdct sinewin"
1915 bink_decoder_select="blockdsp hpeldsp"
1916 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1917 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1918 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1919 cllc_decoder_select="bswapdsp"
1920 comfortnoise_encoder_select="lpc"
1921 cook_decoder_select="audiodsp mdct sinewin"
1922 cscd_decoder_select="lzo"
1923 cscd_decoder_suggest="zlib"
1924 dca_decoder_select="fmtconvert mdct"
1925 dds_decoder_select="texturedsp"
1926 dnxhd_decoder_select="blockdsp idctdsp"
1927 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1928 dvvideo_decoder_select="dvprofile idctdsp"
1929 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1930 dxa_decoder_deps="zlib"
1931 dxv_decoder_select="lzf texturedsp"
1932 eac3_decoder_select="ac3_decoder"
1933 eac3_encoder_select="ac3_encoder"
1934 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1935 eatgq_decoder_select="aandcttables idctdsp"
1936 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1937 exr_decoder_deps="zlib"
1938 ffv1_decoder_select="golomb rangecoder"
1939 ffv1_encoder_select="rangecoder"
1940 ffvhuff_decoder_select="huffyuv_decoder"
1941 ffvhuff_encoder_select="huffyuv_encoder"
1942 fic_decoder_select="golomb"
1943 flac_decoder_select="flacdsp golomb"
1944 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1945 flashsv_decoder_deps="zlib"
1946 flashsv_encoder_deps="zlib"
1947 flashsv2_decoder_deps="zlib"
1948 flv_decoder_select="h263_decoder"
1949 flv_encoder_select="h263_encoder"
1950 fourxm_decoder_select="blockdsp bswapdsp"
1951 fraps_decoder_select="bswapdsp huffman"
1952 g2m_decoder_deps="zlib"
1953 g2m_decoder_select="blockdsp idctdsp jpegtables"
1954 h261_decoder_select="mpeg_er mpegvideo"
1955 h261_encoder_select="aandcttables mpegvideoenc"
1956 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1957 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1958 h263i_decoder_select="h263_decoder"
1959 h263p_encoder_select="h263_encoder"
1960 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
1961 h264_decoder_suggest="error_resilience"
1962 hap_decoder_select="snappy texturedsp"
1963 hap_encoder_deps="libsnappy"
1964 hap_encoder_select="texturedspenc"
1965 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1966 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1967 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1968 iac_decoder_select="imc_decoder"
1969 imc_decoder_select="bswapdsp fft mdct sinewin"
1970 indeo3_decoder_select="hpeldsp"
1971 indeo4_decoder_select="ividsp"
1972 indeo5_decoder_select="ividsp"
1973 interplay_video_decoder_select="hpeldsp"
1974 jpegls_decoder_select="golomb mjpeg_decoder"
1975 jpegls_encoder_select="golomb"
1976 jv_decoder_select="blockdsp"
1977 lagarith_decoder_select="huffyuvdsp"
1978 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1979 loco_decoder_select="golomb"
1980 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1981 metasound_decoder_select="lsp mdct sinewin"
1982 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1983 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1984 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1985 mjpegb_decoder_select="mjpeg_decoder"
1986 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
1987 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
1988 mlp_decoder_select="mlp_parser"
1989 motionpixels_decoder_select="bswapdsp"
1990 mp1_decoder_select="mpegaudio"
1991 mp1float_decoder_select="mpegaudio"
1992 mp2_decoder_select="mpegaudio"
1993 mp2float_decoder_select="mpegaudio"
1994 mp3_decoder_select="mpegaudio"
1995 mp3adu_decoder_select="mpegaudio"
1996 mp3adufloat_decoder_select="mpegaudio"
1997 mp3float_decoder_select="mpegaudio"
1998 mp3on4_decoder_select="mpegaudio"
1999 mp3on4float_decoder_select="mpegaudio"
2000 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2001 mpc8_decoder_select="mpegaudiodsp"
2002 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2003 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2004 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2005 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2006 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2007 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2008 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2009 mpeg4_encoder_select="h263_encoder"
2010 msa1_decoder_select="mss34dsp"
2011 msmpeg4v1_decoder_select="h263_decoder"
2012 msmpeg4v2_decoder_select="h263_decoder"
2013 msmpeg4v2_encoder_select="h263_encoder"
2014 msmpeg4v3_decoder_select="h263_decoder"
2015 msmpeg4v3_encoder_select="h263_encoder"
2016 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2017 mts2_decoder_select="mss34dsp"
2018 mxpeg_decoder_select="mjpeg_decoder"
2019 nellymoser_decoder_select="mdct sinewin"
2020 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2021 nuv_decoder_select="idctdsp lzo"
2022 on2avc_decoder_select="mdct"
2023 opus_decoder_deps="avresample"
2024 opus_decoder_select="imdct15"
2025 png_decoder_deps="zlib"
2026 png_encoder_deps="zlib"
2027 png_encoder_select="huffyuvencdsp"
2028 prores_decoder_select="idctdsp"
2029 prores_encoder_select="fdctdsp"
2030 qcelp_decoder_select="lsp"
2031 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2032 ra_144_encoder_select="audio_frame_queue lpc"
2033 ralf_decoder_select="golomb"
2034 rscc_decoder_deps="zlib"
2035 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2036 rv10_encoder_select="h263_encoder"
2037 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2038 rv20_encoder_select="h263_encoder"
2039 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2040 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2041 screenpresso_decoder_deps="zlib"
2042 shorten_decoder_select="golomb"
2043 sipr_decoder_select="lsp"
2044 sp5x_decoder_select="mjpeg_decoder"
2045 svq1_decoder_select="hpeldsp"
2046 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2047 svq3_decoder_select="golomb h264dsp h264pred hpeldsp tpeldsp videodsp"
2048 svq3_decoder_suggest="zlib"
2049 tak_decoder_select="audiodsp"
2050 tdsc_decoder_deps="zlib"
2051 tdsc_decoder_select="mjpeg_decoder"
2052 theora_decoder_select="vp3_decoder"
2053 thp_decoder_select="mjpeg_decoder"
2054 tiff_decoder_suggest="zlib"
2055 tiff_encoder_suggest="zlib"
2056 truehd_decoder_select="mlp_decoder"
2057 truemotion2_decoder_select="bswapdsp"
2058 truespeech_decoder_select="bswapdsp"
2059 tscc_decoder_deps="zlib"
2060 txd_decoder_select="texturedsp"
2061 twinvq_decoder_select="mdct lsp sinewin"
2062 utvideo_decoder_select="bswapdsp"
2063 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2064 vble_decoder_select="huffyuvdsp"
2065 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2066 vc1image_decoder_select="vc1_decoder"
2067 vorbis_decoder_select="mdct"
2068 vorbis_encoder_select="mdct"
2069 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2070 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2071 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2072 vp6a_decoder_select="vp6_decoder"
2073 vp6f_decoder_select="vp6_decoder"
2074 vp7_decoder_select="h264pred videodsp vp8dsp"
2075 vp8_decoder_select="h264pred videodsp vp8dsp"
2076 vp9_decoder_select="videodsp"
2077 webp_decoder_select="vp8_decoder"
2078 wmapro_decoder_select="mdct sinewin wma_freqs"
2079 wmav1_decoder_select="mdct sinewin wma_freqs"
2080 wmav1_encoder_select="mdct sinewin wma_freqs"
2081 wmav2_decoder_select="mdct sinewin wma_freqs"
2082 wmav2_encoder_select="mdct sinewin wma_freqs"
2083 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2084 wmv1_decoder_select="h263_decoder"
2085 wmv1_encoder_select="h263_encoder"
2086 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2087 wmv2_encoder_select="h263_encoder wmv2dsp"
2088 wmv3_decoder_select="vc1_decoder"
2089 wmv3image_decoder_select="wmv3_decoder"
2090 zerocodec_decoder_deps="zlib"
2091 zlib_decoder_deps="zlib"
2092 zlib_encoder_deps="zlib"
2093 zmbv_decoder_deps="zlib"
2094 zmbv_encoder_deps="zlib"
2095
2096 # hardware accelerators
2097 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2098 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2099 vaapi_deps="va_va_h"
2100 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2101 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2102 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2103
2104 h263_vaapi_hwaccel_deps="vaapi"
2105 h263_vaapi_hwaccel_select="h263_decoder"
2106 h264_d3d11va_hwaccel_deps="d3d11va"
2107 h264_d3d11va_hwaccel_select="h264_decoder"
2108 h264_dxva2_hwaccel_deps="dxva2"
2109 h264_dxva2_hwaccel_select="h264_decoder"
2110 h264_mmal_decoder_deps="mmal"
2111 h264_mmal_decoder_select="mmal"
2112 h264_mmal_hwaccel_deps="mmal"
2113 h264_omx_encoder_deps="omx"
2114 h264_qsv_hwaccel_deps="libmfx"
2115 h264_vaapi_hwaccel_deps="vaapi"
2116 h264_vaapi_hwaccel_select="h264_decoder"
2117 h264_vda_hwaccel_deps="vda"
2118 h264_vda_hwaccel_select="h264_decoder"
2119 h264_vda_old_hwaccel_deps="vda"
2120 h264_vda_old_hwaccel_select="h264_decoder"
2121 h264_vdpau_hwaccel_deps="vdpau"
2122 h264_vdpau_hwaccel_select="h264_decoder"
2123 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2124 hevc_d3d11va_hwaccel_select="hevc_decoder"
2125 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2126 hevc_dxva2_hwaccel_select="hevc_decoder"
2127 hevc_qsv_hwaccel_deps="libmfx"
2128 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2129 hevc_vdpau_hwaccel_select="hevc_decoder"
2130 mpeg1_vdpau_hwaccel_deps="vdpau"
2131 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2132 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2133 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2134 mpeg2_dxva2_hwaccel_deps="dxva2"
2135 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2136 mpeg2_mmal_decoder_deps="mmal"
2137 mpeg2_mmal_decoder_select="mmal"
2138 mpeg2_mmal_hwaccel_deps="mmal"
2139 mpeg2_qsv_hwaccel_deps="libmfx"
2140 mpeg2_vaapi_hwaccel_deps="vaapi"
2141 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2142 mpeg2_vdpau_hwaccel_deps="vdpau"
2143 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2144 mpeg4_omx_encoder_deps="omx"
2145 mpeg4_vaapi_hwaccel_deps="vaapi"
2146 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2147 mpeg4_vdpau_hwaccel_deps="vdpau"
2148 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2149 vc1_d3d11va_hwaccel_deps="d3d11va"
2150 vc1_d3d11va_hwaccel_select="vc1_decoder"
2151 vc1_dxva2_hwaccel_deps="dxva2"
2152 vc1_dxva2_hwaccel_select="vc1_decoder"
2153 vc1_mmal_decoder_deps="mmal"
2154 vc1_mmal_decoder_select="mmal"
2155 vc1_mmal_hwaccel_deps="mmal"
2156 vc1_vaapi_hwaccel_deps="vaapi"
2157 vc1_vaapi_hwaccel_select="vc1_decoder"
2158 vc1_vdpau_hwaccel_deps="vdpau"
2159 vc1_vdpau_hwaccel_select="vc1_decoder"
2160 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2161 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2162 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2163 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2164
2165 # hardware-accelerated codecs
2166 nvenc_deps_any="dlopen LoadLibrary"
2167 nvenc_extralibs='$ldl'
2168 omx_deps="dlopen pthreads"
2169 omx_extralibs='$ldl'
2170 qsvdec_select="qsv"
2171 qsvenc_select="qsv"
2172 vaapi_encode_deps="vaapi"
2173
2174 hwupload_cuda_filter_deps="cuda"
2175 scale_npp_filter_deps="cuda libnpp"
2176
2177 h264_nvenc_encoder_deps="nvenc"
2178 h264_qsv_decoder_deps="libmfx"
2179 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2180 h264_qsv_encoder_deps="libmfx"
2181 h264_qsv_encoder_select="qsvenc"
2182 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2183 h264_vaapi_encoder_select="vaapi_encode golomb"
2184
2185 hevc_nvenc_encoder_deps="nvenc"
2186 hevc_qsv_decoder_deps="libmfx"
2187 hevc_qsv_encoder_deps="libmfx"
2188 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2189 hevc_qsv_encoder_select="qsvenc"
2190 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2191 hevc_vaapi_encoder_select="vaapi_encode golomb"
2192 mpeg2_qsv_decoder_deps="libmfx"
2193 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2194 mpeg2_qsv_encoder_deps="libmfx"
2195 mpeg2_qsv_encoder_select="qsvenc"
2196
2197 nvenc_h264_encoder_deps="nvenc"
2198 nvenc_hevc_encoder_deps="nvenc"
2199
2200 # parsers
2201 h264_parser_select="golomb h264dsp"
2202 hevc_parser_select="golomb"
2203 mpegvideo_parser_select="mpegvideo"
2204 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2205 vc1_parser_select="vc1dsp"
2206
2207 # bitstream_filters
2208 mjpeg2jpeg_bsf_select="jpegtables"
2209
2210 # external libraries
2211 libdcadec_decoder_deps="libdcadec"
2212 libfaac_encoder_deps="libfaac"
2213 libfaac_encoder_select="audio_frame_queue"
2214 libfdk_aac_decoder_deps="libfdk_aac"
2215 libfdk_aac_encoder_deps="libfdk_aac"
2216 libfdk_aac_encoder_select="audio_frame_queue"
2217 libgsm_decoder_deps="libgsm"
2218 libgsm_encoder_deps="libgsm"
2219 libgsm_ms_decoder_deps="libgsm"
2220 libgsm_ms_encoder_deps="libgsm"
2221 libilbc_decoder_deps="libilbc"
2222 libilbc_encoder_deps="libilbc"
2223 libkvazaar_encoder_deps="libkvazaar"
2224 libmp3lame_encoder_deps="libmp3lame"
2225 libmp3lame_encoder_select="audio_frame_queue"
2226 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2227 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2228 libopencore_amrnb_encoder_select="audio_frame_queue"
2229 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2230 libopenh264_encoder_deps="libopenh264"
2231 libopenjpeg_decoder_deps="libopenjpeg"
2232 libopenjpeg_encoder_deps="libopenjpeg"
2233 libopus_decoder_deps="libopus"
2234 libopus_encoder_deps="libopus"
2235 libopus_encoder_select="audio_frame_queue"
2236 libschroedinger_decoder_deps="libschroedinger"
2237 libschroedinger_encoder_deps="libschroedinger"
2238 libspeex_decoder_deps="libspeex"
2239 libspeex_encoder_deps="libspeex"
2240 libspeex_encoder_select="audio_frame_queue"
2241 libtheora_encoder_deps="libtheora"
2242 libtwolame_encoder_deps="libtwolame"
2243 libvo_aacenc_encoder_deps="libvo_aacenc"
2244 libvo_aacenc_encoder_select="audio_frame_queue"
2245 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2246 libvorbis_encoder_deps="libvorbis"
2247 libvorbis_encoder_select="audio_frame_queue"
2248 libvpx_vp8_decoder_deps="libvpx"
2249 libvpx_vp8_encoder_deps="libvpx"
2250 libvpx_vp9_decoder_deps="libvpx"
2251 libvpx_vp9_encoder_deps="libvpx"
2252 libwavpack_encoder_deps="libwavpack"
2253 libwebp_encoder_deps="libwebp"
2254 libx262_encoder_deps="libx262"
2255 libx264_encoder_deps="libx264"
2256 libx265_encoder_deps="libx265"
2257 libxavs_encoder_deps="libxavs"
2258 libxvid_encoder_deps="libxvid"
2259
2260 # demuxers / muxers
2261 ac3_demuxer_select="ac3_parser"
2262 asf_demuxer_select="riffdec"
2263 asf_muxer_select="riffenc"
2264 asf_stream_muxer_select="asf_muxer"
2265 avi_demuxer_select="iso_media riffdec"
2266 avi_muxer_select="riffenc"
2267 avisynth_demuxer_deps="avisynth"
2268 avisynth_demuxer_select="riffdec"
2269 caf_demuxer_select="iso_media riffdec"
2270 dash_muxer_select="mp4_muxer"
2271 dirac_demuxer_select="dirac_parser"
2272 dv_demuxer_select="dvprofile"
2273 dv_muxer_select="dvprofile"
2274 dxa_demuxer_select="riffdec"
2275 eac3_demuxer_select="ac3_parser"
2276 f4v_muxer_select="mov_muxer"
2277 flac_demuxer_select="flac_parser"
2278 hds_muxer_select="flv_muxer"
2279 hls_muxer_select="mpegts_muxer"
2280 ipod_muxer_select="mov_muxer"
2281 ismv_muxer_select="mov_muxer"
2282 matroska_audio_muxer_select="matroska_muxer"
2283 matroska_demuxer_select="iso_media riffdec"
2284 matroska_demuxer_suggest="bzlib lzo zlib"
2285 matroska_muxer_select="iso_media riffenc"
2286 mmf_muxer_select="riffenc"
2287 mov_demuxer_select="iso_media riffdec"
2288 mov_demuxer_suggest="zlib"
2289 mov_muxer_select="iso_media riffenc rtpenc_chain"
2290 mp3_demuxer_select="mpegaudio_parser"
2291 mp4_muxer_select="mov_muxer"
2292 mpegts_demuxer_select="iso_media"
2293 mpegts_muxer_select="adts_muxer latm_muxer"
2294 mpegtsraw_demuxer_select="mpegts_demuxer"
2295 mxf_d10_muxer_select="mxf_muxer"
2296 nut_muxer_select="riffenc"
2297 nuv_demuxer_select="riffdec"
2298 oga_muxer_select="ogg_muxer"
2299 ogg_demuxer_select="dirac_parse"
2300 opus_muxer_select="ogg_muxer"
2301 psp_muxer_select="mov_muxer"
2302 rtp_demuxer_select="sdp_demuxer"
2303 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2304 rtsp_demuxer_select="http_protocol rtpdec"
2305 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2306 sap_demuxer_select="sdp_demuxer"
2307 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2308 sdp_demuxer_select="rtpdec"
2309 smoothstreaming_muxer_select="ismv_muxer"
2310 spdif_muxer_select="aac_parser"
2311 spx_muxer_select="ogg_muxer"
2312 swf_demuxer_suggest="zlib"
2313 tak_demuxer_select="tak_parser"
2314 tg2_muxer_select="mov_muxer"
2315 tgp_muxer_select="mov_muxer"
2316 w64_demuxer_select="wav_demuxer"
2317 wav_demuxer_select="riffdec"
2318 wav_muxer_select="riffenc"
2319 webm_muxer_select="iso_media riffenc"
2320 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2321 wtv_demuxer_select="mpegts_demuxer riffdec"
2322 xmv_demuxer_select="riffdec"
2323 xwma_demuxer_select="riffdec"
2324
2325 # indevs / outdevs
2326 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2327 alsa_outdev_deps="alsa_asoundlib_h"
2328 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2329 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2330 dv1394_indev_deps="dv1394"
2331 dv1394_indev_select="dv_demuxer"
2332 fbdev_indev_deps="linux_fb_h"
2333 jack_indev_deps="jack_jack_h"
2334 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2335 libcdio_indev_deps="libcdio"
2336 libdc1394_indev_deps="libdc1394"
2337 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2338 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2339 pulse_indev_deps="libpulse"
2340 sndio_indev_deps="sndio_h"
2341 sndio_outdev_deps="sndio_h"
2342 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2343 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2344 vfwcap_indev_extralibs="-lavicap32"
2345 x11grab_indev_deps="x11grab"
2346 x11grab_xcb_indev_deps="libxcb"
2347
2348 # protocols
2349 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2350 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2351 ffrtmpcrypt_protocol_select="tcp_protocol"
2352 ffrtmphttp_protocol_deps="!librtmp_protocol"
2353 ffrtmphttp_protocol_select="http_protocol"
2354 gopher_protocol_select="network"
2355 http_protocol_select="tcp_protocol"
2356 httpproxy_protocol_select="tcp_protocol"
2357 https_protocol_select="tls_protocol"
2358 icecast_protocol_select="http_protocol"
2359 librtmp_protocol_deps="librtmp"
2360 librtmpe_protocol_deps="librtmp"
2361 librtmps_protocol_deps="librtmp"
2362 librtmpt_protocol_deps="librtmp"
2363 librtmpte_protocol_deps="librtmp"
2364 mmsh_protocol_select="http_protocol"
2365 mmst_protocol_select="network"
2366 rtmp_protocol_deps="!librtmp_protocol"
2367 rtmp_protocol_select="tcp_protocol"
2368 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2369 rtmps_protocol_deps="!librtmp_protocol"
2370 rtmps_protocol_select="tls_protocol"
2371 rtmpt_protocol_select="ffrtmphttp_protocol"
2372 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2373 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2374 rtp_protocol_select="udp_protocol"
2375 sctp_protocol_deps="struct_sctp_event_subscribe"
2376 sctp_protocol_select="network"
2377 srtp_protocol_select="rtp_protocol srtp"
2378 tcp_protocol_select="network"
2379 tls_gnutls_protocol_deps="gnutls"
2380 tls_gnutls_protocol_select="tcp_protocol"
2381 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2382 tls_openssl_protocol_select="tcp_protocol"
2383 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2384 udp_protocol_select="network"
2385 unix_protocol_deps="sys_un_h"
2386 unix_protocol_select="network"
2387
2388 # filters
2389 blackframe_filter_deps="gpl"
2390 boxblur_filter_deps="gpl"
2391 bs2b_filter_deps="libbs2b"
2392 cropdetect_filter_deps="gpl"
2393 delogo_filter_deps="gpl"
2394 drawtext_filter_deps="libfreetype"
2395 frei0r_filter_deps="frei0r dlopen"
2396 frei0r_filter_extralibs='$ldl'
2397 frei0r_src_filter_deps="frei0r dlopen"
2398 frei0r_src_filter_extralibs='$ldl'
2399 hqdn3d_filter_deps="gpl"
2400 interlace_filter_deps="gpl"
2401 ocv_filter_deps="libopencv"
2402 resample_filter_deps="avresample"
2403 scale_filter_deps="swscale"
2404 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2405
2406 # examples
2407 avcodec_example_deps="avcodec avutil"
2408 filter_audio_example_deps="avfilter avutil"
2409 metadata_example_deps="avformat avutil"
2410 output_example_deps="avcodec avformat avutil swscale"
2411 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2412 transcode_aac_example_deps="avcodec avformat avresample"
2413
2414 # libraries, in linking order
2415 avcodec_deps="avutil"
2416 avdevice_deps="avformat avcodec avutil"
2417 avfilter_deps="avutil"
2418 avformat_deps="avcodec avutil"
2419 avresample_deps="avutil"
2420 swscale_deps="avutil"
2421
2422 # programs
2423 avconv_deps="avcodec avfilter avformat avresample swscale"
2424 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2425                fps_filter null_filter resample_filter scale_filter
2426                setpts_filter trim_filter"
2427 avplay_deps="avcodec avfilter avformat avresample sdl"
2428 avplay_libs='$sdl_libs'
2429 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2430 avprobe_deps="avcodec avformat"
2431
2432 # documentation
2433 pod2man_deps="doc"
2434 texi2html_deps="doc"
2435
2436 # default parameters
2437
2438 logfile="config.log"
2439
2440 # installation paths
2441 prefix_default="/usr/local"
2442 bindir_default='${prefix}/bin'
2443 datadir_default='${prefix}/share/avconv'
2444 docdir_default='${prefix}/share/doc/libav'
2445 incdir_default='${prefix}/include'
2446 libdir_default='${prefix}/lib'
2447 mandir_default='${prefix}/share/man'
2448 shlibdir_default="$libdir_default"
2449
2450 # toolchain
2451 ar_default="ar"
2452 cc_default="gcc"
2453 host_cc_default="gcc"
2454 cp_f="cp -f"
2455 ln_s="ln -s -f"
2456 nm_default="nm -g"
2457 objformat="elf"
2458 pkg_config_default=pkg-config
2459 ranlib="ranlib"
2460 strip="strip"
2461 yasmexe="yasm"
2462
2463 # machine
2464 arch_default=$(uname -m)
2465 cpu="generic"
2466 intrinsics="none"
2467
2468 # OS
2469 target_os_default=$(tolower $(uname -s))
2470 host_os=$target_os_default
2471
2472 # configurable options
2473 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2474
2475 enable asm
2476 enable debug
2477 enable doc
2478 enable faan faandct faanidct
2479 enable optimizations
2480 enable safe_bitstream_reader
2481 enable static
2482 enable swscale_alpha
2483 enable valgrind_backtrace
2484
2485 # By default, enable only those hwaccels that have no external dependencies.
2486 enable d3d11va dxva2 vda vdpau
2487
2488 # build settings
2489 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2490 LIBPREF="lib"
2491 LIBSUF=".a"
2492 FULLNAME='$(NAME)$(BUILDSUF)'
2493 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2494 SLIBPREF="lib"
2495 SLIBSUF=".so"
2496 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2497 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2498 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2499 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2500 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2501 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2502
2503 asflags_filter=echo
2504 cflags_filter=echo
2505 ldflags_filter=echo
2506
2507 AS_C='-c'
2508 AS_O='-o $@'
2509 CC_C='-c'
2510 CC_E='-E -o $@'
2511 CC_O='-o $@'
2512 OBJCC_C='-c'
2513 OBJCC_E='-E -o $@'
2514 OBJCC_O='-o $@'
2515 LD_O='-o $@'
2516 LD_LIB='-l%'
2517 LD_PATH='-L'
2518 HOSTCC_C='-c'
2519 HOSTCC_E='-E -o $@'
2520 HOSTCC_O='-o $@'
2521 HOSTLD_O='-o $@'
2522
2523 host_libs='-lm'
2524 host_cflags_filter=echo
2525 host_ldflags_filter=echo
2526
2527 target_path='$(CURDIR)'
2528
2529 # since the object filename is not given with the -MM flag, the compiler
2530 # is only able to print the basename, and we must add the path ourselves
2531 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2532 DEPFLAGS='-MM'
2533
2534 # find source path
2535 if test -f configure; then
2536     source_path=.
2537 else
2538     source_path=$(cd $(dirname "$0"); pwd)
2539     echo "$source_path" | grep -q '[[:blank:]]' &&
2540         die "Out of tree builds are impossible with whitespace in source path."
2541     test -e "$source_path/config.h" &&
2542         die "Out of tree builds are impossible with config.h in source dir."
2543 fi
2544
2545 for v in "$@"; do
2546     r=${v#*=}
2547     l=${v%"$r"}
2548     r=$(sh_quote "$r")
2549     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2550 done
2551
2552 find_things(){
2553     thing=$1
2554     pattern=$2
2555     file=$source_path/$3
2556     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2557 }
2558
2559 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2560 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2561 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2562 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2563 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2564 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2565 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2566 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2567 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2568
2569 find_things_extern(){
2570     thing=$1
2571     pattern=$2
2572     file=$source_path/$3
2573     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2574 }
2575
2576 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2577 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2578
2579 ALL_COMPONENTS="
2580     $BSF_LIST
2581     $DECODER_LIST
2582     $DEMUXER_LIST
2583     $ENCODER_LIST
2584     $FILTER_LIST
2585     $HWACCEL_LIST
2586     $INDEV_LIST
2587     $MUXER_LIST
2588     $OUTDEV_LIST
2589     $PARSER_LIST
2590     $PROTOCOL_LIST
2591 "
2592
2593 for n in $COMPONENT_LIST; do
2594     v=$(toupper ${n%s})_LIST
2595     eval enable \$$v
2596     eval ${n}_if_any="\$$v"
2597 done
2598
2599 enable $ARCH_EXT_LIST
2600
2601 die_unknown(){
2602     echo "Unknown option \"$1\"."
2603     echo "See $0 --help for available options."
2604     exit 1
2605 }
2606
2607 print_3_columns() {
2608     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2609 }
2610
2611 show_list() {
2612     suffix=_$1
2613     shift
2614     echo $* | sed s/$suffix//g | print_3_columns
2615     exit 0
2616 }
2617
2618 rand_list(){
2619     IFS=', '
2620     set -- $*
2621     unset IFS
2622     for thing; do
2623         comp=${thing%:*}
2624         prob=${thing#$comp}
2625         prob=${prob#:}
2626         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2627         echo "prob ${prob:-0.5}"
2628         printf '%s\n' $comp
2629     done
2630 }
2631
2632 do_random(){
2633     action=$1
2634     shift
2635     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2636     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2637 }
2638
2639 for opt do
2640     optval="${opt#*=}"
2641     case "$opt" in
2642         --extra-ldflags=*)
2643             add_ldflags $optval
2644         ;;
2645         --extra-ldexeflags=*)
2646             add_ldexeflags $optval
2647         ;;
2648         --extra-libs=*)
2649             add_extralibs $optval
2650         ;;
2651         --disable-devices)
2652             disable $INDEV_LIST $OUTDEV_LIST
2653         ;;
2654         --enable-debug=*)
2655             debuglevel="$optval"
2656         ;;
2657         --disable-programs)
2658             disable $PROGRAM_LIST
2659         ;;
2660         --disable-everything)
2661             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2662         ;;
2663         --disable-all)
2664             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2665             disable $LIBRARY_LIST $PROGRAM_LIST doc
2666         ;;
2667         --enable-random|--disable-random)
2668             action=${opt%%-random}
2669             do_random ${action#--} $COMPONENT_LIST
2670         ;;
2671         --enable-random=*|--disable-random=*)
2672             action=${opt%%-random=*}
2673             do_random ${action#--} $optval
2674         ;;
2675         --enable-*=*|--disable-*=*)
2676             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2677             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2678             eval list=\$$(toupper $thing)_LIST
2679             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2680             $action $(filter "$name" $list)
2681         ;;
2682         --enable-avserver|--disable-avserver*)
2683             warn "avserver has been removed, the ${opt} option is only"\
2684                  "provided for compatibility and will be removed in the future"
2685         ;;
2686         --enable-?*|--disable-?*)
2687             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2688             if is_in $option $COMPONENT_LIST; then
2689                 test $action = disable && action=unset
2690                 eval $action \$$(toupper ${option%s})_LIST
2691             elif is_in $option $CMDLINE_SELECT; then
2692                 $action $option
2693             else
2694                 die_unknown $opt
2695             fi
2696         ;;
2697         --list-*)
2698             NAME="${opt#--list-}"
2699             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2700             NAME=${NAME%s}
2701             eval show_list $NAME \$$(toupper $NAME)_LIST
2702         ;;
2703         --help|-h) show_help
2704         ;;
2705         *)
2706             optname="${opt%%=*}"
2707             optname="${optname#--}"
2708             optname=$(echo "$optname" | sed 's/-/_/g')
2709             if is_in $optname $CMDLINE_SET; then
2710                 eval $optname='$optval'
2711             elif is_in $optname $CMDLINE_APPEND; then
2712                 append $optname "$optval"
2713             else
2714                 die_unknown $opt
2715             fi
2716         ;;
2717     esac
2718 done
2719
2720 for e in $env; do
2721     eval "export $e"
2722 done
2723
2724 disabled logging && logfile=/dev/null
2725
2726 # Disable all the library-specific components if the library itself
2727 # is disabled, see AVCODEC_LIST and following _LIST variables.
2728
2729 disable_components(){
2730     disabled ${1} && disable $(
2731         eval components="\$$(toupper ${1})_COMPONENTS"
2732         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2733     )
2734 }
2735
2736 map 'disable_components $v' $LIBRARY_LIST
2737
2738 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2739 set >> $logfile
2740
2741 case "$toolchain" in
2742     *-asan)
2743         cc_default="${toolchain%-asan}"
2744         add_cflags  -fsanitize=address
2745         add_ldflags -fsanitize=address
2746     ;;
2747     *-msan)
2748         cc_default="${toolchain%-msan}"
2749         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2750         add_ldflags -fsanitize=memory
2751     ;;
2752     *-tsan)
2753         cc_default="${toolchain%-tsan}"
2754         add_cflags  -fsanitize=thread -pie
2755         add_ldflags -fsanitize=thread -pie
2756         case "$toolchain" in
2757             gcc-tsan)
2758                 add_cflags  -fPIC
2759                 add_ldflags -fPIC
2760                 ;;
2761         esac
2762     ;;
2763     *-usan)
2764         cc_default="${toolchain%-usan}"
2765         add_cflags  -fsanitize=undefined
2766         add_ldflags -fsanitize=undefined
2767         case "$toolchain" in
2768             clang-usan)
2769                 add_cflags -O1
2770                 ;;
2771         esac
2772     ;;
2773     valgrind-*)
2774         target_exec_default="valgrind"
2775         case "$toolchain" in
2776             valgrind-massif)
2777                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2778                 ;;
2779             valgrind-memcheck)
2780                 target_exec_args="--track-origins=yes --leak-check=full"
2781                 ;;
2782         esac
2783     ;;
2784     msvc)
2785         # Check whether the current MSVC version needs the C99 converter.
2786         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2787         # support enough of C99 to build libav. Default to the new
2788         # behaviour if the regexp was unable to match anything, since this
2789         # successfully parses the version number of existing supported
2790         # versions that require the converter (MSVC 2010 and 2012).
2791         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2792         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2793             cc_default="cl"
2794         else
2795             cc_default="c99wrap cl"
2796         fi
2797         ld_default="$source_path/compat/windows/mslink"
2798         nm_default="dumpbin -symbols"
2799         ar_default="lib"
2800         case "$arch" in
2801         arm*)
2802             as_default="armasm"
2803             ;;
2804         esac
2805         target_os_default="win32"
2806         # Use a relative path for TMPDIR. This makes sure all the
2807         # ffconf temp files are written with a relative path, avoiding
2808         # issues with msys/win32 path conversion for MSVC parameters
2809         # such as -Fo<file> or -out:<file>.
2810         TMPDIR=.
2811     ;;
2812     icl)
2813         cc_default="icl"
2814         ld_default="xilink"
2815         nm_default="dumpbin -symbols"
2816         ar_default="xilib"
2817         target_os_default="win32"
2818         TMPDIR=.
2819     ;;
2820     gcov)
2821         add_cflags  -fprofile-arcs -ftest-coverage
2822         add_ldflags -fprofile-arcs -ftest-coverage
2823     ;;
2824     llvm-cov)
2825         add_cflags -fprofile-arcs -ftest-coverage
2826         add_ldflags --coverage
2827     ;;
2828     hardened)
2829         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2830         add_cflags   -fno-strict-overflow -fstack-protector-all
2831         add_ldflags  -Wl,-z,relro -Wl,-z,now
2832     ;;
2833     ?*)
2834         die "Unknown toolchain $toolchain"
2835     ;;
2836 esac
2837
2838 test -n "$cross_prefix" && enable cross_compile
2839
2840 if enabled cross_compile; then
2841     test -n "$arch" && test -n "$target_os" ||
2842         die "Must specify target arch and OS when cross-compiling"
2843 fi
2844
2845 ar_default="${cross_prefix}${ar_default}"
2846 cc_default="${cross_prefix}${cc_default}"
2847 occ_default="${cross_prefix}${occ_default}"
2848 nm_default="${cross_prefix}${nm_default}"
2849 pkg_config_default="${cross_prefix}${pkg_config_default}"
2850 ranlib="${cross_prefix}${ranlib}"
2851 strip="${cross_prefix}${strip}"
2852
2853 sysinclude_default="${sysroot}/usr/include"
2854
2855 set_default arch cc pkg_config sysinclude target_exec target_os
2856 enabled cross_compile || host_cc_default=$cc
2857 set_default host_cc
2858
2859 if ! $pkg_config --version >/dev/null 2>&1; then
2860     warn "$pkg_config not found, library detection may fail."
2861     pkg_config=false
2862 fi
2863
2864 exesuf() {
2865     case $1 in
2866         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2867     esac
2868 }
2869
2870 EXESUF=$(exesuf $target_os)
2871 HOSTEXESUF=$(exesuf $host_os)
2872
2873 # set temporary file name
2874 : ${TMPDIR:=$TEMPDIR}
2875 : ${TMPDIR:=$TMP}
2876 : ${TMPDIR:=/tmp}
2877
2878 if ! check_cmd mktemp -u XXXXXX; then
2879     # simple replacement for missing mktemp
2880     # NOT SAFE FOR GENERAL USE
2881     mktemp(){
2882         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2883     }
2884 fi
2885
2886 tmpfile(){
2887     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2888         (set -C; exec > $tmp) 2>/dev/null ||
2889         die "Unable to create temporary file in $TMPDIR."
2890     append TMPFILES $tmp
2891     eval $1=$tmp
2892 }
2893
2894 trap 'rm -f -- $TMPFILES' EXIT
2895
2896 tmpfile TMPASM .asm
2897 tmpfile TMPC   .c
2898 tmpfile TMPE   $EXESUF
2899 tmpfile TMPH   .h
2900 tmpfile TMPO   .o
2901 tmpfile TMPS   .S
2902 tmpfile TMPSH  .sh
2903 tmpfile TMPV   .ver
2904
2905 unset -f mktemp
2906
2907 chmod +x $TMPE
2908
2909 # make sure we can execute files in $TMPDIR
2910 cat > $TMPSH 2>> $logfile <<EOF
2911 #! /bin/sh
2912 EOF
2913 chmod +x $TMPSH >> $logfile 2>&1
2914 if ! $TMPSH >> $logfile 2>&1; then
2915     cat <<EOF
2916 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2917 variable to another directory and make sure that it is not mounted noexec.
2918 EOF
2919     die "Sanity test failed."
2920 fi
2921
2922 armasm_flags(){
2923     for flag; do
2924         case $flag in
2925             # Filter out MSVC cl.exe options from cflags that shouldn't
2926             # be passed to gas-preprocessor
2927             -M[TD]*)                                            ;;
2928             *)                  echo $flag                      ;;
2929         esac
2930    done
2931 }
2932
2933 ccc_flags(){
2934     for flag; do
2935         case $flag in
2936             -std=c99)           echo -c99                       ;;
2937             -mcpu=*)            echo -arch ${flag#*=}           ;;
2938             -mieee)             echo -ieee                      ;;
2939             -O*|-fast)          echo $flag                      ;;
2940             -fno-math-errno)    echo -assume nomath_errno       ;;
2941             -g)                 echo -g3                        ;;
2942             -Wall)              echo -msg_enable level2         ;;
2943             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2944             -Wl,*)              echo $flag                      ;;
2945             -f*|-W*)                                            ;;
2946             *)                  echo $flag                      ;;
2947         esac
2948    done
2949 }
2950
2951 cparser_flags(){
2952     for flag; do
2953         case $flag in
2954             -Wno-switch)             echo -Wno-switch-enum ;;
2955             -Wno-format-zero-length) ;;
2956             -Wdisabled-optimization) ;;
2957             -Wno-pointer-sign)       echo -Wno-other ;;
2958             *)                       echo $flag ;;
2959         esac
2960     done
2961 }
2962
2963 msvc_common_flags(){
2964     for flag; do
2965         case $flag in
2966             # In addition to specifying certain flags under the compiler
2967             # specific filters, they must be specified here as well or else the
2968             # generic catch all at the bottom will print the original flag.
2969             -Wall)                ;;
2970             -std=c99)             ;;
2971             # Common flags
2972             -fomit-frame-pointer) ;;
2973             -g)                   echo -Z7 ;;
2974             -fno-math-errno)      ;;
2975             -fno-common)          ;;
2976             -fno-signed-zeros)    ;;
2977             -fPIC)                ;;
2978             -mthumb)              ;;
2979             -march=*)             ;;
2980             -lz)                  echo zlib.lib ;;
2981             -lavifil32)           echo vfw32.lib ;;
2982             -lavicap32)           echo vfw32.lib user32.lib ;;
2983             -lx264)               echo libx264.lib ;;
2984             -l*)                  echo ${flag#-l}.lib ;;
2985             -L*)                  echo -libpath:${flag#-L} ;;
2986             *)                    echo $flag ;;
2987         esac
2988     done
2989 }
2990
2991 msvc_flags(){
2992     msvc_common_flags "$@"
2993     for flag; do
2994         case $flag in
2995             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2996                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2997                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2998                                        -wd4273 -wd4554 -wd4701 ;;
2999         esac
3000     done
3001 }
3002
3003 icl_flags(){
3004     msvc_common_flags "$@"
3005     for flag; do
3006         case $flag in
3007             # Despite what Intel's documentation says -Wall, which is supported
3008             # on Windows, does enable remarks so disable them here.
3009             -Wall)                echo $flag -Qdiag-disable:remark ;;
3010             -std=c99)             echo -Qstd=c99 ;;
3011         esac
3012     done
3013 }
3014
3015 pgi_flags(){
3016     for flag; do
3017         case $flag in
3018             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3019             -fomit-frame-pointer) echo -Mnoframe ;;
3020             -g)                   echo -gopt ;;
3021             *)                    echo $flag ;;
3022         esac
3023     done
3024 }
3025
3026 suncc_flags(){
3027     for flag; do
3028         case $flag in
3029             -march=*|-mcpu=*)
3030                 case "${flag#*=}" in
3031                     native)                   echo -xtarget=native       ;;
3032                     v9|niagara)               echo -xarch=sparc          ;;
3033                     ultrasparc)               echo -xarch=sparcvis       ;;
3034                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3035                     i586|pentium)             echo -xchip=pentium        ;;
3036                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3037                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3038                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3039                     pentium4*)          echo -xtarget=pentium4           ;;
3040                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3041                     *-sse3)             echo -xarch=sse3                 ;;
3042                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3043                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3044                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3045                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3046                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3047                     k8|opteron|athlon64|athlon-fx)
3048                                                echo -xarch=sse2a         ;;
3049                     athlon*)                   echo -xarch=pentium_proa  ;;
3050                 esac
3051                 ;;
3052             -std=c99)             echo -xc99              ;;
3053             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3054             -fPIC)                echo -KPIC -xcode=pic32 ;;
3055             -W*,*)                echo $flag              ;;
3056             -f*-*|-W*|-mimpure-text)                      ;;
3057             -shared)              echo -G                 ;;
3058             *)                    echo $flag              ;;
3059         esac
3060     done
3061 }
3062
3063 tms470_flags(){
3064     for flag; do
3065         case $flag in
3066             -march=*|-mcpu=*)
3067                 case "${flag#*=}" in
3068                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3069                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3070                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3071                     armv6*|arm11*)          echo -mv=6   ;;
3072                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3073                                             echo -mv=5e  ;;
3074                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3075                 esac
3076                 ;;
3077             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3078             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3079             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3080             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3081             -msoft-float)   echo --float_support=vfplib       ;;
3082             -O[0-3]|-mf=*)  echo $flag                        ;;
3083             -g)             echo -g -mn                       ;;
3084             -pds=*)         echo $flag                        ;;
3085             -D*|-I*)        echo $flag                        ;;
3086             --gcc|--abi=*)  echo $flag                        ;;
3087             -me)            echo $flag                        ;;
3088         esac
3089     done
3090 }
3091
3092 probe_cc(){
3093     pfx=$1
3094     _cc=$2
3095
3096     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3097     unset _ld_o _ldflags _ld_lib _ld_path
3098     unset _depflags _DEPCMD _DEPFLAGS
3099     _flags_filter=echo
3100
3101     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3102         _type=llvm_gcc
3103         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3104         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3105         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3106         _cflags_speed='-O3'
3107         _cflags_size='-Os'
3108     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3109         _type=gcc
3110         gcc_version=$($_cc --version | head -n1)
3111         gcc_basever=$($_cc -dumpversion)
3112         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3113         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3114         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3115         if ! $_cc -dumpversion | grep -q '^2\.'; then
3116             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3117         fi
3118         _cflags_speed='-O3'
3119         _cflags_size='-Os'
3120     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3121         _type=icc
3122         _ident=$($_cc --version | head -n1)
3123         _depflags='-MMD'
3124         _cflags_speed='-O3'
3125         _cflags_size='-Os'
3126         _cflags_noopt='-O1'
3127     elif $_cc -v 2>&1 | grep -q xlc; then
3128         _type=xlc
3129         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3130         _cflags_speed='-O5'
3131         _cflags_size='-O5 -qcompact'
3132     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3133         _type=ccc
3134         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3135         _DEPFLAGS='-M'
3136         _cflags_speed='-fast'
3137         _cflags_size='-O1'
3138         _flags_filter=ccc_flags
3139     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3140         test -d "$sysroot" || die "No valid sysroot specified."
3141         _type=armcc
3142         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3143         armcc_conf="$PWD/armcc.conf"
3144         $_cc --arm_linux_configure                 \
3145              --arm_linux_config_file="$armcc_conf" \
3146              --configure_sysroot="$sysroot"        \
3147              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3148              die "Error creating armcc configuration file."
3149         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3150         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3151         as_default="${cross_prefix}gcc"
3152         _depflags='-MMD'
3153         _cflags_speed='-O3'
3154         _cflags_size='-Os'
3155     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3156         _type=tms470
3157         _ident=$($_cc -version | head -n1 | tr -s ' ')
3158         _flags='--gcc --abi=eabi -me'
3159         _cc_e='-ppl -fe=$@'
3160         _cc_o='-fe=$@'
3161         _depflags='-ppa -ppd=$(@:.o=.d)'
3162         _cflags_speed='-O3 -mf=5'
3163         _cflags_size='-O3 -mf=2'
3164         _flags_filter=tms470_flags
3165     elif $_cc -v 2>&1 | grep -q clang; then
3166         _type=clang
3167         _ident=$($_cc --version 2>/dev/null | head -n1)
3168         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3169         _cflags_speed='-O3'
3170         _cflags_size='-Os'
3171     elif $_cc -V 2>&1 | grep -q Sun; then
3172         _type=suncc
3173         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3174         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3175         _DEPFLAGS='-xM1 -xc99'
3176         _ldflags='-std=c99'
3177         _cflags_speed='-O5'
3178         _cflags_size='-O5 -xspace'
3179         _flags_filter=suncc_flags
3180     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3181         _type=pathscale
3182         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3183         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3184         _cflags_speed='-O2'
3185         _cflags_size='-Os'
3186         _flags_filter='filter_out -Wdisabled-optimization'
3187     elif $_cc -v 2>&1 | grep -q Open64; then
3188         _type=open64
3189         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3190         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3191         _cflags_speed='-O2'
3192         _cflags_size='-Os'
3193         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3194     elif $_cc -V 2>&1 | grep -q Portland; then
3195         _type=pgi
3196         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3197         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3198         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3199         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3200         _cflags_noopt="-O1"
3201         _flags_filter=pgi_flags
3202     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3203         _type=armasm
3204         _ident=$($_cc | head -n1)
3205         # 4509: "This form of conditional instruction is deprecated"
3206         _flags="-nologo -ignore 4509"
3207         _flags_filter=armasm_flags
3208     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3209         _type=msvc
3210         _ident=$($_cc 2>&1 | head -n1)
3211         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3212         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3213         _cflags_speed="-O2"
3214         _cflags_size="-O1"
3215         if $_cc -nologo- 2>&1 | grep -q Linker; then
3216             _ld_o='-out:$@'
3217         else
3218             _ld_o='-Fe$@'
3219         fi
3220         _cc_o='-Fo$@'
3221         _cc_e='-P -Fi$@'
3222         _flags_filter=msvc_flags
3223         _ld_lib='lib%.a'
3224         _ld_path='-libpath:'
3225         _flags='-nologo'
3226         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3227     elif $_cc 2>&1 | grep -q Intel; then
3228         _type=icl
3229         _ident=$($_cc 2>&1 | head -n1)
3230         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3231         # Not only is O3 broken on 13.x+ but it is slower on all previous
3232         # versions (tested) as well.
3233         _cflags_speed="-O2"
3234         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3235         if $_cc 2>&1 | grep -q Linker; then
3236             _ld_o='-out:$@'
3237         else
3238             _ld_o='-Fe$@'
3239         fi
3240         _cc_o='-Fo$@'
3241         _cc_e='-P'
3242         _flags_filter=icl_flags
3243         _ld_lib='lib%.a'
3244         _ld_path='-libpath:'
3245         # -Qdiag-error to make icl error when seeing certain unknown arguments
3246         _flags='-nologo -Qdiag-error:4044,10157'
3247         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3248         # with MSVC which enables it by default.
3249         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3250     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3251         _type=cparser
3252         _ident=$($_cc --version | head -n1)
3253         _depflags='-MMD'
3254         _cflags_speed='-O4'
3255         _cflags_size='-O2'
3256         _flags_filter=cparser_flags
3257     fi
3258
3259     eval ${pfx}_type=\$_type
3260     eval ${pfx}_ident=\$_ident
3261 }
3262
3263 set_ccvars(){
3264     eval ${1}_C=\${_cc_c-\${${1}_C}}
3265     eval ${1}_E=\${_cc_e-\${${1}_E}}
3266     eval ${1}_O=\${_cc_o-\${${1}_O}}
3267
3268     if [ -n "$_depflags" ]; then
3269         eval ${1}_DEPFLAGS=\$_depflags
3270     else
3271         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3272         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3273         eval DEP${1}FLAGS=\$_flags
3274     fi
3275 }
3276
3277 probe_cc cc "$cc"
3278 cflags_filter=$_flags_filter
3279 cflags_speed=$_cflags_speed
3280 cflags_size=$_cflags_size
3281 cflags_noopt=$_cflags_noopt
3282 add_cflags $_flags $_cflags
3283 cc_ldflags=$_ldflags
3284 set_ccvars CC
3285
3286 probe_cc hostcc "$host_cc"
3287 host_cflags_filter=$_flags_filter
3288 add_host_cflags  $_flags $_cflags
3289 set_ccvars HOSTCC
3290
3291 test -n "$cc_type" && enable $cc_type ||
3292     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3293
3294 : ${as_default:=$cc}
3295 : ${objcc_default:=$cc}
3296 : ${dep_cc_default:=$cc}
3297 : ${ld_default:=$cc}
3298 : ${host_ld_default:=$host_cc}
3299 set_default ar as objcc dep_cc ld host_ld
3300
3301 probe_cc as "$as"
3302 asflags_filter=$_flags_filter
3303 add_asflags $_flags $_cflags
3304 set_ccvars AS
3305
3306 probe_cc objcc "$objcc"
3307 objcflags_filter=$_flags_filter
3308 add_objcflags $_flags $_cflags
3309 set_ccvars OBJC
3310
3311 probe_cc ld "$ld"
3312 ldflags_filter=$_flags_filter
3313 add_ldflags $_flags $_ldflags
3314 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3315 LD_O=${_ld_o-$LD_O}
3316 LD_LIB=${_ld_lib-$LD_LIB}
3317 LD_PATH=${_ld_path-$LD_PATH}
3318
3319 probe_cc hostld "$host_ld"
3320 host_ldflags_filter=$_flags_filter
3321 add_host_ldflags $_flags $_ldflags
3322 HOSTLD_O=${_ld_o-$HOSTLD_O}
3323
3324 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3325     probe_cc depcc "$dep_cc"
3326     CCDEP=${_DEPCMD:-$DEPCMD}
3327     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3328     DEPCCFLAGS=$_flags
3329 fi
3330
3331 if $ar 2>&1 | grep -q Microsoft; then
3332     arflags="-nologo"
3333     ar_o='-out:$@'
3334 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3335     arflags="rq"
3336     ar_o='$@'
3337 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3338     arflags='-Xany -r -c'
3339     ar_o='$@'
3340 else
3341     arflags="rc"
3342     ar_o='$@'
3343 fi
3344
3345 add_cflags $extra_cflags
3346 add_objcflags $extra_objcflags
3347 add_asflags $extra_cflags
3348
3349 if test -n "$sysroot"; then
3350     case "$cc_type" in
3351         gcc|llvm_gcc|clang)
3352             add_cppflags --sysroot="$sysroot"
3353             add_ldflags --sysroot="$sysroot"
3354         ;;
3355         tms470)
3356             add_cppflags -I"$sysinclude"
3357             add_ldflags  --sysroot="$sysroot"
3358         ;;
3359     esac
3360 fi
3361
3362 if test "$cpu" = host; then
3363     enabled cross_compile &&
3364         die "--cpu=host makes no sense when cross-compiling."
3365
3366     case "$cc_type" in
3367         gcc|llvm_gcc)
3368             check_native(){
3369                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3370                 sed -n "/cc1.*$1=/{
3371                             s/.*$1=\\([^ ]*\\).*/\\1/
3372                             p
3373                             q
3374                         }" $TMPE
3375             }
3376             cpu=$(check_native -march || check_native -mcpu)
3377         ;;
3378     esac
3379
3380     test "${cpu:-host}" = host &&
3381         die "--cpu=host not supported with compiler $cc"
3382 fi
3383
3384 # Deal with common $arch aliases
3385 case "$arch" in
3386     aarch64|arm64)
3387         arch="aarch64"
3388     ;;
3389     arm*)
3390         arch="arm"
3391     ;;
3392     mips*|IP*)
3393         case "$arch" in
3394         *el)
3395             add_cppflags -EL
3396             add_ldflags -EL
3397         ;;
3398         *eb)
3399             add_cppflags -EB
3400             add_ldflags -EB
3401         ;;
3402         esac
3403         arch="mips"
3404     ;;
3405     parisc*|hppa*)
3406         arch="parisc"
3407     ;;
3408     "Power Macintosh"|ppc*|powerpc*)
3409         arch="ppc"
3410     ;;
3411     s390|s390x)
3412         arch="s390"
3413     ;;
3414     sh4|sh)
3415         arch="sh4"
3416     ;;
3417     sun4u|sparc*)
3418         arch="sparc"
3419     ;;
3420     tilegx|tile-gx)
3421         arch="tilegx"
3422     ;;
3423     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3424         arch="x86"
3425     ;;
3426 esac
3427
3428 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3429 enable $arch
3430
3431 # Add processor-specific flags
3432 if enabled aarch64; then
3433
3434     case $cpu in
3435         armv*)
3436             cpuflags="-march=$cpu"
3437         ;;
3438         *)
3439             cpuflags="-mcpu=$cpu"
3440         ;;
3441     esac
3442
3443 elif enabled alpha; then
3444
3445     cpuflags="-mcpu=$cpu"
3446
3447 elif enabled arm; then
3448
3449     check_arm_arch() {
3450         check_cpp_condition stddef.h \
3451             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3452             $cpuflags
3453     }
3454
3455     probe_arm_arch() {
3456         if   check_arm_arch 4;        then echo armv4
3457         elif check_arm_arch 4T;       then echo armv4t
3458         elif check_arm_arch 5;        then echo armv5
3459         elif check_arm_arch 5E;       then echo armv5e
3460         elif check_arm_arch 5T;       then echo armv5t
3461         elif check_arm_arch 5TE;      then echo armv5te
3462         elif check_arm_arch 5TEJ;     then echo armv5te
3463         elif check_arm_arch 6;        then echo armv6
3464         elif check_arm_arch 6J;       then echo armv6j
3465         elif check_arm_arch 6K;       then echo armv6k
3466         elif check_arm_arch 6Z;       then echo armv6z
3467         elif check_arm_arch 6ZK;      then echo armv6zk
3468         elif check_arm_arch 6T2;      then echo armv6t2
3469         elif check_arm_arch 7;        then echo armv7
3470         elif check_arm_arch 7A  7_A;  then echo armv7-a
3471         elif check_arm_arch 7S;       then echo armv7-a
3472         elif check_arm_arch 7R  7_R;  then echo armv7-r
3473         elif check_arm_arch 7M  7_M;  then echo armv7-m
3474         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3475         elif check_arm_arch 8A  8_A;  then echo armv8-a
3476         fi
3477     }
3478
3479     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3480
3481     case $cpu in
3482         armv*)
3483             cpuflags="-march=$cpu"
3484             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3485         ;;
3486         *)
3487             cpuflags="-mcpu=$cpu"
3488             case $cpu in
3489                 cortex-a*)                               subarch=armv7a  ;;
3490                 cortex-r*)                               subarch=armv7r  ;;
3491                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3492                 arm11*)                                  subarch=armv6   ;;
3493                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3494                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3495                 *)                             subarch=$(probe_arm_arch) ;;
3496             esac
3497         ;;
3498     esac
3499
3500     case "$subarch" in
3501         armv5t*)    enable fast_clz                ;;
3502         armv[6-8]*) enable fast_clz fast_unaligned ;;
3503     esac
3504
3505 elif enabled avr32; then
3506
3507     case $cpu in
3508         ap7[02]0[0-2])
3509             subarch="avr32_ap"
3510             cpuflags="-mpart=$cpu"
3511         ;;
3512         ap)
3513             subarch="avr32_ap"
3514             cpuflags="-march=$cpu"
3515         ;;
3516         uc3[ab]*)
3517             subarch="avr32_uc"
3518             cpuflags="-mcpu=$cpu"
3519         ;;
3520         uc)
3521             subarch="avr32_uc"
3522             cpuflags="-march=$cpu"
3523         ;;
3524     esac
3525
3526 elif enabled bfin; then
3527
3528     cpuflags="-mcpu=$cpu"
3529
3530 elif enabled mips; then
3531
3532     cpuflags="-march=$cpu"
3533
3534 elif enabled ppc; then
3535
3536     disable ldbrx
3537
3538     case $(tolower $cpu) in
3539         601|ppc601|powerpc601)
3540             cpuflags="-mcpu=601"
3541             disable altivec
3542         ;;
3543         603*|ppc603*|powerpc603*)
3544             cpuflags="-mcpu=603"
3545             disable altivec
3546         ;;
3547         604*|ppc604*|powerpc604*)
3548             cpuflags="-mcpu=604"
3549             disable altivec
3550         ;;
3551         g3|75*|ppc75*|powerpc75*)
3552             cpuflags="-mcpu=750"
3553             disable altivec
3554         ;;
3555         g4|745*|ppc745*|powerpc745*)
3556             cpuflags="-mcpu=7450"
3557             disable vsx
3558         ;;
3559         74*|ppc74*|powerpc74*)
3560             cpuflags="-mcpu=7400"
3561             disable vsx
3562         ;;
3563         g5|970|ppc970|powerpc970)
3564             cpuflags="-mcpu=970"
3565             disable vsx
3566         ;;
3567         power[3-6]*)
3568             cpuflags="-mcpu=$cpu"
3569             disable vsx
3570         ;;
3571         power[7-8]*)
3572             cpuflags="-mcpu=$cpu"
3573             enable ldbrx
3574         ;;
3575         cell)
3576             cpuflags="-mcpu=cell"
3577             enable ldbrx
3578             disable vsx
3579         ;;
3580         e500mc)
3581             cpuflags="-mcpu=e500mc"
3582             disable altivec
3583         ;;
3584         e500v2)
3585             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3586             disable altivec
3587             disable dcbzl
3588         ;;
3589         e500)
3590             cpuflags="-mcpu=8540 -mhard-float"
3591             disable altivec
3592             disable dcbzl
3593         ;;
3594     esac
3595
3596 elif enabled sparc; then
3597
3598     case $cpu in
3599         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3600             cpuflags="-mcpu=$cpu"
3601         ;;
3602         ultrasparc*|niagara[234])
3603             cpuflags="-mcpu=$cpu"
3604         ;;
3605     esac
3606
3607 elif enabled x86; then
3608
3609     case $cpu in
3610         i[345]86|pentium)
3611             cpuflags="-march=$cpu"
3612             disable i686
3613             disable mmx
3614         ;;
3615         # targets that do NOT support nopl and conditional mov (cmov)
3616         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3617             cpuflags="-march=$cpu"
3618             disable i686
3619         ;;
3620         # targets that do support nopl and conditional mov (cmov)
3621         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3622             cpuflags="-march=$cpu"
3623             enable i686
3624             enable fast_cmov
3625         ;;
3626         # targets that do support conditional mov but on which it's slow
3627         pentium4|pentium4m|prescott|nocona)
3628             cpuflags="-march=$cpu"
3629             enable i686
3630             disable fast_cmov
3631         ;;
3632     esac
3633
3634 fi
3635
3636 if [ "$cpu" != generic ]; then
3637     add_cflags  $cpuflags
3638     add_asflags $cpuflags
3639     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3640 fi
3641
3642 # compiler sanity check
3643 check_exec <<EOF
3644 int main(void){ return 0; }
3645 EOF
3646 if test "$?" != 0; then
3647     echo "$cc is unable to create an executable file."
3648     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3649         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3650         echo "Only do this if you know what cross compiling means."
3651     fi
3652     die "C compiler test failed."
3653 fi
3654
3655 add_cppflags -D_ISOC99_SOURCE
3656 check_cflags -std=c99
3657 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3658 #include <stdlib.h>
3659 EOF
3660 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3661 #include <stdlib.h>
3662 EOF
3663
3664 add_host_cppflags -D_ISOC99_SOURCE
3665 check_host_cflags -std=c99
3666 check_host_cflags -Wall
3667 check_host_cflags -O3
3668
3669 check_64bit(){
3670     arch32=$1
3671     arch64=$2
3672     expr=$3
3673     check_code cc "" "int test[2*($expr) - 1]" &&
3674         subarch=$arch64 || subarch=$arch32
3675 }
3676
3677 case "$arch" in
3678     aarch64|alpha|ia64)
3679         spic=$shared
3680     ;;
3681     mips)
3682         check_64bit mips mips64 '_MIPS_SIM > 1'
3683         spic=$shared
3684     ;;
3685     parisc)
3686         check_64bit parisc parisc64 'sizeof(void *) > 4'
3687         spic=$shared
3688     ;;
3689     ppc)
3690         check_64bit ppc ppc64 'sizeof(void *) > 4'
3691         spic=$shared
3692     ;;
3693     s390)
3694         check_64bit s390 s390x 'sizeof(void *) > 4'
3695         spic=$shared
3696     ;;
3697     sparc)
3698         check_64bit sparc sparc64 'sizeof(void *) > 4'
3699         spic=$shared
3700     ;;
3701     x86)
3702         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3703         if test "$subarch" = "x86_64"; then
3704             spic=$shared
3705         fi
3706     ;;
3707 esac
3708
3709 enable $subarch
3710 enabled spic && enable_weak pic
3711
3712 # OS specific
3713 case $target_os in
3714     aix)
3715         SHFLAGS=-shared
3716         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3717         enabled shared && add_ldflags -Wl,-brtl
3718         ;;
3719     android)
3720         disable symver
3721         enable section_data_rel_ro
3722         SLIB_INSTALL_NAME='$(SLIBNAME)'
3723         SLIB_INSTALL_LINKS=
3724         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3725         ;;
3726     haiku)
3727         prefix_default="/boot/common"
3728         network_extralibs="-lnetwork"
3729         host_libs=
3730         ;;
3731     sunos)
3732         SHFLAGS='-shared -Wl,-h,$$(@F)'
3733         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3734         network_extralibs="-lsocket -lnsl"
3735         # When using suncc to build, the Solaris linker will mark
3736         # an executable with each instruction set encountered by
3737         # the Solaris assembler.  As our libraries contain their own
3738         # guards for processor-specific code, instead suppress
3739         # generation of the HWCAPS ELF section on Solaris x86 only.
3740         enabled_all suncc x86 &&
3741             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3742             add_ldflags -Wl,-M,mapfile
3743         nm_default='nm -P -g'
3744         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3745         ;;
3746     netbsd)
3747         disable symver
3748         oss_indev_extralibs="-lossaudio"
3749         oss_outdev_extralibs="-lossaudio"
3750         ;;
3751     openbsd|bitrig)
3752         disable symver
3753         SHFLAGS='-shared'
3754         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3755         SLIB_INSTALL_LINKS=
3756         oss_indev_extralibs="-lossaudio"
3757         oss_outdev_extralibs="-lossaudio"
3758         ;;
3759     dragonfly)
3760         disable symver
3761         ;;
3762     freebsd)
3763         ;;
3764     bsd/os)
3765         add_extralibs -lpoll -lgnugetopt
3766         ;;
3767     darwin)
3768         enabled ppc && add_asflags -force_cpusubtype_ALL
3769         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3770         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3771         add_ldflags -Wl,-dynamic,-search_paths_first
3772         SLIBSUF=".dylib"
3773         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3774         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3775         objformat="macho"
3776         enabled x86_64 && objformat="macho64"
3777         enabled_any pic shared ||
3778             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3779         check_header dispatch/dispatch.h &&
3780             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3781         ;;
3782     msys*)
3783         die "Native MSYS builds are discouraged, please use the MINGW environment."
3784         ;;
3785     mingw32*|mingw64*)
3786         if test $target_os = "mingw32ce"; then
3787             disable network
3788         else
3789             target_os=mingw32
3790         fi
3791         LIBTARGET=i386
3792         if enabled x86_64; then
3793             LIBTARGET="i386:x86-64"
3794         elif enabled arm; then
3795             LIBTARGET=arm-wince
3796         fi
3797         check_ldflags -Wl,--nxcompat
3798         check_ldflags -Wl,--dynamicbase
3799         shlibdir_default="$bindir_default"
3800         SLIBPREF=""
3801         SLIBSUF=".dll"
3802         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3803         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3804         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3805         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3806         SLIB_INSTALL_LINKS=
3807         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3808         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3809         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3810         objformat="win32"
3811         dlltool="${cross_prefix}dlltool"
3812         ranlib=:
3813         enable dos_paths
3814         ;;
3815     win32|win64)
3816         disable symver
3817         if enabled shared; then
3818             # Link to the import library instead of the normal static library
3819             # for shared libs.
3820             LD_LIB='%.lib'
3821             # Cannot build both shared and static libs with MSVC or icl.
3822             disable static
3823         fi
3824         shlibdir_default="$bindir_default"
3825         SLIBPREF=""
3826         SLIBSUF=".dll"
3827         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3828         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3829         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3830         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3831         SLIB_INSTALL_LINKS=
3832         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3833         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3834         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3835         objformat="win32"
3836         ranlib=:
3837         enable dos_paths
3838         ;;
3839     cygwin*)
3840         target_os=cygwin
3841         shlibdir_default="$bindir_default"
3842         SLIBPREF="cyg"
3843         SLIBSUF=".dll"
3844         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3845         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3846         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3847         SLIB_INSTALL_LINKS=
3848         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3849         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3850         objformat="win32"
3851         enable dos_paths
3852         ;;
3853     *-dos|freedos|opendos)
3854         network_extralibs="-lsocket"
3855         objformat="coff"
3856         enable dos_paths
3857         add_cppflags -U__STRICT_ANSI__
3858         ;;
3859     linux)
3860         enable dv1394
3861         enable section_data_rel_ro
3862         ;;
3863     irix*)
3864         target_os=irix
3865         ranlib="echo ignoring ranlib"
3866         ;;
3867     os/2*)
3868         ln_s="cp -f"
3869         objformat="aout"
3870         add_cppflags -D_GNU_SOURCE
3871         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3872         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3873         LIBSUF="_s.a"
3874         SLIBPREF=""
3875         SLIBSUF=".dll"
3876         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3877         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3878         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3879             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3880             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3881             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3882             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3883         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3884             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3885         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3886         enable dos_paths
3887         ;;
3888     gnu/kfreebsd)
3889         add_cppflags -D_BSD_SOURCE
3890         ;;
3891     gnu)
3892         ;;
3893     qnx)
3894         add_cppflags -D_QNX_SOURCE
3895         network_extralibs="-lsocket"
3896         ;;
3897     symbian)
3898         SLIBSUF=".dll"
3899         enable dos_paths
3900         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3901         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3902         add_ldflags -Wl,--target1-abs,--no-undefined \
3903                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3904                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3905         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3906                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3907                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3908         ;;
3909     osf1)
3910         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3911         ;;
3912     minix)
3913         ;;
3914     plan9)
3915         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3916                      -D_REENTRANT_SOURCE        \
3917                      -D_RESEARCH_SOURCE         \
3918                      -DFD_SETSIZE=96            \
3919                      -DHAVE_SOCK_OPTS
3920         add_compat strtod.o strtod=avpriv_strtod
3921         network_extralibs='-lbsd'
3922         exeobjs=compat/plan9/main.o
3923         cp_f='cp'
3924         ;;
3925     none)
3926         ;;
3927     *)
3928         die "Unknown OS '$target_os'."
3929         ;;
3930 esac
3931
3932 # determine libc flavour
3933
3934 probe_libc(){
3935     pfx=$1
3936     pfx_no_=${pfx%_}
3937     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3938     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3939         eval ${pfx}libc_type=uclibc
3940         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3941     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3942         eval ${pfx}libc_type=glibc
3943         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3944     # MinGW headers can be installed on Cygwin, so check for newlib first.
3945     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3946         eval ${pfx}libc_type=newlib
3947         add_${pfx}cppflags -U__STRICT_ANSI__
3948     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3949     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3950         eval ${pfx}libc_type=mingw64
3951         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3952         eval test \$${pfx_no_}cc_type = "gcc" &&
3953             add_${pfx}cppflags -D__printf__=__gnu_printf__
3954     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3955          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3956         eval ${pfx}libc_type=mingw32
3957         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3958             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3959             die "ERROR: MinGW32 runtime version must be >= 3.15."
3960         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3961         eval test \$${pfx_no_}cc_type = "gcc" &&
3962             add_${pfx}cppflags -D__printf__=__gnu_printf__
3963     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3964         eval ${pfx}libc_type=msvcrt
3965         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3966             if [ "$pfx" = host_ ]; then
3967                 add_host_cppflags -Dsnprintf=_snprintf
3968             else
3969                 add_compat strtod.o strtod=avpriv_strtod
3970                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3971                                              _snprintf=avpriv_snprintf  \
3972                                              vsnprintf=avpriv_vsnprintf
3973             fi
3974         fi
3975         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3976         # 0x601 by default unless something else is set by the user.
3977         # This can easily lead to us detecting functions only present
3978         # in such new versions and producing binaries requiring windows 7.0.
3979         # Therefore explicitly set the default to XP unless the user has
3980         # set something else on the command line.
3981         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3982         # family. For these cases, configure is free to use any functions
3983         # found in the SDK headers by default. (Alternatively, we could force
3984         # _WIN32_WINNT to 0x0602 in that case.)
3985         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3986             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3987 #ifdef WINAPI_FAMILY
3988 #include <winapifamily.h>
3989 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3990 #error not desktop
3991 #endif
3992 #endif
3993 EOF
3994     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3995         eval ${pfx}libc_type=klibc
3996     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3997         eval ${pfx}libc_type=bionic
3998     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3999         eval ${pfx}libc_type=solaris
4000         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4001     else
4002         eval ${pfx}libc_type=default
4003         add_${pfx}cppflags -D_DEFAULT_SOURCE
4004     fi
4005 }
4006
4007 probe_libc
4008 test -n "$libc_type" && enable libc_$libc_type
4009 probe_libc host_
4010 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4011
4012 case $libc_type in
4013     bionic)
4014         add_compat strtod.o strtod=avpriv_strtod
4015         ;;
4016 esac
4017
4018 # hacks for compiler/libc/os combinations
4019
4020 if enabled_all tms470 libc_glibc; then
4021     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4022     add_cppflags -D__USER_LABEL_PREFIX__=
4023     add_cppflags -D__builtin_memset=memset
4024     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4025     add_cflags   -pds=48    # incompatible redefinition of macro
4026 fi
4027
4028 if enabled_all ccc libc_glibc; then
4029     add_ldflags -Wl,-z,now  # calls to libots crash without this
4030 fi
4031
4032 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4033     add_cppflags '-I\$(SRC_PATH)/compat/float'
4034
4035 esc(){
4036     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4037 }
4038
4039 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4040
4041 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4042
4043 set_default $PATHS_LIST
4044 set_default nm
4045
4046 # we need to build at least one lib type
4047 if ! enabled_any static shared; then
4048     cat <<EOF
4049 At least one library type must be built.
4050 Specify --enable-static to build the static libraries or --enable-shared to
4051 build the shared libraries as well. To only build the shared libraries specify
4052 --disable-static in addition to --enable-shared.
4053 EOF
4054     exit 1
4055 fi
4056
4057 die_license_disabled() {
4058     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4059 }
4060
4061 die_license_disabled gpl libcdio
4062 die_license_disabled gpl libx264
4063 die_license_disabled gpl libx265
4064 die_license_disabled gpl libxavs
4065 die_license_disabled gpl libxvid
4066 die_license_disabled gpl x11grab
4067
4068 die_license_disabled nonfree cuda
4069 die_license_disabled nonfree libfaac
4070 die_license_disabled nonfree libfdk_aac
4071 die_license_disabled nonfree libnpp
4072 die_license_disabled nonfree nvenc
4073 die_license_disabled nonfree openssl
4074
4075 die_license_disabled version3 libopencore_amrnb
4076 die_license_disabled version3 libopencore_amrwb
4077 die_license_disabled version3 libvo_aacenc
4078 die_license_disabled version3 libvo_amrwbenc
4079
4080 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4081
4082 disabled optimizations || check_cflags -fomit-frame-pointer
4083
4084 enable_weak_pic() {
4085     disabled pic && return
4086     enable pic
4087     add_cppflags -DPIC
4088     case "$target_os" in
4089     mingw*|cygwin*)
4090         ;;
4091     *)
4092         add_cflags -fPIC
4093         ;;
4094     esac
4095     add_asflags  -fPIC
4096 }
4097
4098 enabled pic && enable_weak_pic
4099
4100 check_cc <<EOF || die "Symbol mangling check failed."
4101 int ff_extern;
4102 EOF
4103 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4104 extern_prefix=${sym%%ff_extern*}
4105
4106 check_cc <<EOF && enable_weak inline_asm
4107 void foo(void) { __asm__ volatile ("" ::); }
4108 EOF
4109
4110 _restrict=
4111 for restrict_keyword in restrict __restrict__ __restrict; do
4112     check_cc <<EOF && _restrict=$restrict_keyword && break
4113 void foo(char * $restrict_keyword p);
4114 EOF
4115 done
4116
4117 check_cc <<EOF && enable pragma_deprecated
4118 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4119 EOF
4120
4121 check_cc <<EOF && enable attribute_packed
4122 struct { int x; } __attribute__((packed)) x;
4123 EOF
4124
4125 check_cc <<EOF && enable attribute_may_alias
4126 union { int x; } __attribute__((may_alias)) x;
4127 EOF
4128
4129 check_cc <<EOF || die "endian test failed"
4130 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4131 EOF
4132 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4133
4134 check_gas() {
4135     log "check_gas using '$as' as AS"
4136     # :vararg is used on aarch64, arm and ppc altivec
4137     check_as <<EOF || return 1
4138 .macro m n, y:vararg=0
4139 \n: .int \y
4140 .endm
4141 m x
4142 EOF
4143     # .altmacro is only used in arm asm
4144     ! enabled arm || check_as <<EOF || return 1
4145 .altmacro
4146 EOF
4147     enable gnu_as
4148     return 0
4149 }
4150
4151 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4152     nogas=:
4153     enabled_any arm aarch64 && nogas=die
4154     enabled_all ppc altivec && nogas=warn
4155     as_noop=-v
4156
4157     case $as_type in
4158         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4159         gcc)  gaspp_as_type=gas ;;
4160         *)    gaspp_as_type=$as_type ;;
4161     esac
4162
4163     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4164
4165     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4166         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4167
4168     if ! check_gas ; then
4169         as=${gas:=$as}
4170         check_gas || \
4171             $nogas "GNU assembler not found, install/update gas-preprocessor"
4172     fi
4173
4174     check_as <<EOF && enable as_func
4175 .func test
4176 .endfunc
4177 EOF
4178 fi
4179
4180 check_inline_asm inline_asm_labels '"1:\n"'
4181
4182 if enabled aarch64; then
4183     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4184     # internal assembler in clang 3.3 does not support this instruction
4185     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4186     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4187
4188     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4189
4190 elif enabled alpha; then
4191
4192     check_cflags -mieee
4193
4194 elif enabled arm; then
4195
4196     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4197     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4198     enabled thumb && check_cflags -mthumb || check_cflags -marm
4199
4200     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4201         enable vfp_args
4202     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4203         enable vfp_args
4204     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4205         case "${cross_prefix:-$cc}" in
4206             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4207             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4208 __asm__ (".eabi_attribute 28, 1");
4209 int main(void) { return 0; }
4210 EOF
4211         esac
4212         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4213     fi
4214
4215     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4216     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4217     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4218     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4219     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4220     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4221
4222     [ $target_os = linux ] || [ $target_os = android ] ||
4223         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4224             $ARCH_EXT_LIST_ARM
4225
4226     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4227
4228     check_as <<EOF && enable as_dn_directive
4229 ra .dn d0.i16
4230 .unreq ra
4231 EOF
4232
4233     # llvm's integrated assembler supports .object_arch from llvm 3.5
4234     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4235 .object_arch armv4
4236 EOF
4237
4238     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4239
4240 elif enabled mips; then
4241
4242     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4243
4244     # make sure that only an instruction set is enabled
4245     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4246
4247     if enabled mips64; then
4248         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4249             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4250                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4251     else
4252         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4253             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4254                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4255     fi
4256
4257 elif enabled parisc; then
4258
4259     if enabled gcc; then
4260         case $($cc -dumpversion) in
4261             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4262         esac
4263     fi
4264
4265 elif enabled ppc; then
4266
4267     enable local_aligned_8 local_aligned_16
4268
4269     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4270     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4271     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4272     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4273
4274     # AltiVec flags: The FSF version of GCC differs from the Apple version
4275     if enabled altivec; then
4276         check_cflags -maltivec -mabi=altivec &&
4277         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4278         check_cflags -faltivec
4279
4280         # check if our compiler supports Motorola AltiVec C API
4281         check_cc <<EOF || disable altivec
4282 $inc_altivec_h
4283 int main(void) {
4284     vector signed int v1 = (vector signed int) { 0 };
4285     vector signed int v2 = (vector signed int) { 1 };
4286     v1 = vec_add(v1, v2);
4287     return 0;
4288 }
4289 EOF
4290
4291         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4292     fi
4293
4294     if enabled vsx; then
4295         check_cflags -mvsx &&
4296         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4297     fi
4298
4299     if enabled power8; then
4300         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4301     fi
4302
4303 elif enabled x86; then
4304
4305     check_builtin rdtsc    intrin.h   "__rdtsc()"
4306     check_builtin mm_empty mmintrin.h "_mm_empty()"
4307
4308     enable local_aligned_8 local_aligned_16
4309
4310     # check whether EBP is available on x86
4311     # As 'i' is stored on the stack, this program will crash
4312     # if the base pointer is used to access it because the
4313     # base pointer is cleared in the inline assembly code.
4314     check_exec_crash <<EOF && enable ebp_available
4315 volatile int i=0;
4316 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4317 return i;
4318 EOF
4319
4320     # check whether EBX is available on x86
4321     check_inline_asm ebx_available '""::"b"(0)' &&
4322         check_inline_asm ebx_available '"":::"%ebx"'
4323
4324     # check whether xmm clobbers are supported
4325     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4326
4327     # check whether binutils is new enough to compile SSSE3/MMXEXT
4328     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4329     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4330
4331     if ! disabled_any asm mmx yasm; then
4332         if check_cmd $yasmexe --version; then
4333             enabled x86_64 && yasm_extra="-m amd64"
4334             yasm_debug="-g dwarf2"
4335         elif check_cmd nasm -v; then
4336             yasmexe=nasm
4337             yasm_debug="-g -F dwarf"
4338             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4339         fi
4340
4341         YASMFLAGS="-f $objformat $yasm_extra"
4342         enabled pic               && append YASMFLAGS "-DPIC"
4343         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4344         case "$objformat" in
4345             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4346         esac
4347
4348         check_yasm "movbe ecx, [5]" && enable yasm ||
4349             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4350         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4351         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4352         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4353         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4354         check_yasm "CPU amdnop" || disable cpunop
4355     fi
4356
4357     case "$cpu" in
4358         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4359             disable fast_clz
4360         ;;
4361     esac
4362
4363 fi
4364
4365 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4366
4367 check_ldflags -Wl,--as-needed
4368
4369 if check_func dlopen; then
4370     ldl=
4371 elif check_func dlopen -ldl; then
4372     ldl=-ldl
4373 fi
4374
4375 if ! disabled network; then
4376     check_func getaddrinfo $network_extralibs
4377     check_func inet_aton $network_extralibs
4378
4379     check_type netdb.h "struct addrinfo"
4380     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4381     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4382     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4383     check_type poll.h "struct pollfd"
4384     check_type netinet/sctp.h "struct sctp_event_subscribe"
4385     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4386     check_type netinet/in.h "struct sockaddr_in6"
4387     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4388     check_type "sys/types.h sys/socket.h" socklen_t
4389
4390     # Prefer arpa/inet.h over winsock2
4391     if check_header arpa/inet.h ; then
4392         check_func closesocket
4393     elif check_header winsock2.h ; then
4394         check_func_headers winsock2.h closesocket -lws2 &&
4395             network_extralibs="-lws2" ||
4396         { check_func_headers winsock2.h closesocket -lws2_32 &&
4397             network_extralibs="-lws2_32"; } || disable winsock2_h network
4398         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4399
4400         check_type ws2tcpip.h socklen_t
4401         check_type ws2tcpip.h "struct addrinfo"
4402         check_type ws2tcpip.h "struct group_source_req"
4403         check_type ws2tcpip.h "struct ip_mreq_source"
4404         check_type ws2tcpip.h "struct ipv6_mreq"
4405         check_type winsock2.h "struct pollfd"
4406         check_struct winsock2.h "struct sockaddr" sa_len
4407         check_type ws2tcpip.h "struct sockaddr_in6"
4408         check_type ws2tcpip.h "struct sockaddr_storage"
4409     else
4410         disable network
4411     fi
4412 fi
4413
4414 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4415 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4416 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4417 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4418
4419 case "$custom_allocator" in
4420     jemalloc)
4421         # jemalloc by default does not use a prefix
4422         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4423     ;;
4424     tcmalloc)
4425         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4426         malloc_prefix=tc_
4427     ;;
4428 esac
4429
4430 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4431 check_func  ${malloc_prefix}memalign            && enable memalign
4432 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4433
4434 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4435     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4436
4437 check_func  fcntl
4438 check_func  fork
4439 check_func  gethrtime
4440 check_func  getopt
4441 check_func  getrusage
4442 check_func  gettimeofday
4443 check_func  gmtime_r
4444 check_func  isatty
4445 check_func  localtime_r
4446 check_func  mach_absolute_time
4447 check_func  mkstemp
4448 check_func  mmap
4449 check_func  mprotect
4450 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4451 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4452 check_func  sched_getaffinity
4453 check_func  setrlimit
4454 check_func  strerror_r
4455 check_func  sysconf
4456 check_func  sysctl
4457 check_func  usleep
4458
4459 check_func_headers io.h setmode
4460 check_func_headers stdlib.h getenv
4461
4462 check_func_headers windows.h CoTaskMemFree -lole32
4463 check_func_headers windows.h GetProcessAffinityMask
4464 check_func_headers windows.h GetProcessTimes
4465 check_func_headers windows.h GetSystemTimeAsFileTime
4466 check_func_headers windows.h LoadLibrary
4467 check_func_headers windows.h MapViewOfFile
4468 check_func_headers windows.h SetConsoleTextAttribute
4469 check_func_headers windows.h Sleep
4470 check_func_headers windows.h VirtualAlloc
4471 check_struct windows.h "CONDITION_VARIABLE" Ptr
4472
4473 check_header direct.h
4474 check_header dlfcn.h
4475 check_header d3d11.h
4476 check_header dxva.h
4477 check_header dxva2api.h
4478 check_header io.h
4479 check_header mach/mach_time.h
4480 check_header malloc.h
4481 check_header poll.h
4482 check_header sys/mman.h
4483 check_header sys/param.h
4484 check_header sys/resource.h
4485 check_header sys/select.h
4486 check_header sys/time.h
4487 check_header sys/un.h
4488 check_header unistd.h
4489 check_header valgrind/valgrind.h
4490 check_header vdpau/vdpau.h
4491 check_header vdpau/vdpau_x11.h
4492 check_header VideoDecodeAcceleration/VDADecoder.h
4493 check_header windows.h
4494 check_header X11/extensions/XvMClib.h
4495
4496 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4497 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4498 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4499
4500 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4501
4502 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4503 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4504 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4505
4506 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4507 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4508 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4509 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4510
4511 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4512
4513 if ! disabled w32threads && ! enabled pthreads; then
4514     check_func_headers "windows.h process.h" _beginthreadex &&
4515         enable w32threads || disable w32threads
4516 fi
4517
4518 # check for some common methods of building with pthread support
4519 # do this before the optional library checks as some of them require pthreads
4520 if ! disabled pthreads && ! enabled w32threads; then
4521     enable pthreads
4522     if check_func pthread_join -pthread; then
4523         add_cflags -pthread
4524         add_extralibs -pthread
4525     elif check_func pthread_join -pthreads; then
4526         add_cflags -pthreads
4527         add_extralibs -pthreads
4528     elif check_func pthread_join -lpthreadGC2; then
4529         add_extralibs -lpthreadGC2
4530     elif check_lib pthread.h pthread_join -lpthread; then
4531         :
4532     elif ! check_func pthread_join; then
4533         disable pthreads
4534     fi
4535 fi
4536
4537 enabled pthreads &&
4538     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4539
4540 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4541 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4542
4543 check_lib math.h sin -lm && LIBM="-lm"
4544 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4545
4546 atan2f_args=2
4547 ldexpf_args=2
4548 powf_args=2
4549
4550 for func in $MATH_FUNCS; do
4551     eval check_mathfunc $func \${${func}_args:-1}
4552 done
4553
4554 # these are off by default, so fail if requested and not available
4555 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4556                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4557                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4558 enabled cuda              && check_lib cuda.h cuInit -lcuda
4559 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4560 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4561 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4562 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4563 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4564 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4565 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4566 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4567 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4568                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4569                                done || die "ERROR: libgsm not found"; }
4570 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4571 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4572 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4573 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4574 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4575 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4576 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4577 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4578 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4579 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4580                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4581 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4582 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4583 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4584 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4585 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4586 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4587 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4588 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4589 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4590 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4591 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4592 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4593     enabled libvpx_vp8_decoder && {
4594         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4595             disable libvpx_vp8_decoder;
4596     }
4597     enabled libvpx_vp8_encoder && {
4598         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4599             disable libvpx_vp8_encoder;
4600     }
4601     enabled libvpx_vp9_decoder && {
4602         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4603             disable libvpx_vp9_decoder;
4604     }
4605     enabled libvpx_vp9_encoder && {
4606         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4607             disable libvpx_vp9_encoder;
4608     }
4609     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4610         die "libvpx enabled but no supported decoders found"
4611     fi
4612 }
4613 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4614 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4615 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4616                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4617                                die "ERROR: libx264 version must be >= 0.118."; } &&
4618                              { check_cpp_condition x264.h "X264_MPEG2" &&
4619                                enable libx262; }
4620 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4621                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4622                                die "ERROR: libx265 version must be >= 57."; }
4623 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4624 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4625 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4626                                 { ! enabled cross_compile && {
4627                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4628                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4629                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4630                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4631                                die "ERROR: mmal not found"; }
4632 enabled mmal && check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"
4633 enabled omx_rpi && enable omx
4634 enabled omx               && { check_header OMX_Core.h ||
4635                                 { ! enabled cross_compile && enabled omx_rpi && {
4636                                     add_cflags -isystem/opt/vc/include/IL ; }
4637                                 check_header OMX_Core.h ; } ||
4638                                die "ERROR: OpenMAX IL headers not found"; }
4639 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4640                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4641                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4642                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4643                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4644                                die "ERROR: openssl not found"; }
4645
4646 if enabled gnutls; then
4647     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4648     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4649 fi
4650
4651 # libdc1394 check
4652 if enabled libdc1394; then
4653     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4654         enable libdc1394_2; } ||
4655     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4656         enable libdc1394_1; } ||
4657     die "ERROR: No version of libdc1394 found "
4658 fi
4659
4660 if enabled nvenc; then
4661     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found."
4662     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4663     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4664         die "ERROR: NVENC API version 4 or older is not supported"
4665 fi
4666
4667 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4668     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4669     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4670     enable sdl
4671 fi
4672
4673 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4674 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4675
4676 check_header linux/fb.h
4677 check_header linux/videodev2.h
4678 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4679
4680 check_header AVFoundation/AVFoundation.h &&
4681     check_objcflags -fobjc-arc &&
4682     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4683     disable AVFoundation_AVFoundation_h
4684
4685 check_header sys/videoio.h
4686
4687 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4688 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4689 # w32api 3.12 had it defined wrong
4690 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4691
4692 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4693 { check_header dev/bktr/ioctl_meteor.h &&
4694   check_header dev/bktr/ioctl_bt848.h; } ||
4695 { check_header machine/ioctl_meteor.h &&
4696   check_header machine/ioctl_bt848.h; } ||
4697 { check_header dev/video/meteor/ioctl_meteor.h &&
4698   check_header dev/video/bktr/ioctl_bt848.h; } ||
4699 check_header dev/ic/bt8xx.h
4700
4701 check_header sndio.h
4702 check_header sys/soundcard.h
4703 check_header soundcard.h
4704
4705 enabled_any alsa_indev alsa_outdev &&
4706     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4707
4708 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4709     check_func jack_port_get_latency_range -ljack
4710
4711 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4712
4713 if enabled libcdio; then
4714     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4715     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4716     die "ERROR: No usable libcdio/cdparanoia found"
4717 fi
4718
4719 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4720
4721 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4722     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4723         enabled libxcb && die "ERROR: libxcb not found";
4724     } && disable x11grab && enable libxcb
4725
4726     disabled libxcb_shm ||
4727         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4728             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4729         } && check_header sys/shm.h && enable libxcb_shm
4730
4731     disabled libxcb_xfixes ||
4732         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4733             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4734         } && enable libxcb_xfixes
4735
4736     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4737     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4738 fi
4739
4740 if enabled x11grab; then
4741     enabled xlib || die "ERROR: Xlib not found"
4742     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4743     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4744 fi
4745
4746 enabled vaapi &&
4747     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4748     disable vaapi
4749
4750 if enabled vaapi ; then
4751     enabled xlib &&
4752     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4753     enable vaapi_x11
4754
4755     check_lib2 "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4756     enable vaapi_drm
4757 fi
4758
4759 enabled vdpau &&
4760     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4761     disable vdpau
4762
4763 enabled vdpau && enabled xlib &&
4764     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4765     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4766     enable vdpau_x11
4767
4768 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4769
4770 # add some useful compiler flags if supported
4771 check_cflags -Wdeclaration-after-statement
4772 check_cflags -Wall
4773 check_cflags -Wdisabled-optimization
4774 check_cflags -Wpointer-arith
4775 check_cflags -Wredundant-decls
4776 check_cflags -Wwrite-strings
4777 check_cflags -Wtype-limits
4778 check_cflags -Wundef
4779 check_cflags -Wmissing-prototypes
4780 check_cflags -Wstrict-prototypes
4781 enabled extra_warnings && check_cflags -Winline
4782 enabled extra_warnings && check_cflags -Wcast-qual
4783
4784 check_disable_warning(){
4785     warning_flag=-W${1#-Wno-}
4786     test_cflags $warning_flag && add_cflags $1
4787 }
4788
4789 check_disable_warning -Wno-parentheses
4790 check_disable_warning -Wno-switch
4791 check_disable_warning -Wno-format-zero-length
4792 check_disable_warning -Wno-pointer-sign
4793
4794 # add some linker flags
4795 check_ldflags -Wl,--warn-common
4796 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4797 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4798 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4799
4800 # add some strip flags
4801 # -wN '..@*' is more selective than -x, but not available everywhere.
4802 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4803
4804 enabled neon_clobber_test &&
4805     check_ldflags -Wl,--wrap,avcodec_open2              \
4806                   -Wl,--wrap,avcodec_decode_audio4      \
4807                   -Wl,--wrap,avcodec_decode_video2      \
4808                   -Wl,--wrap,avcodec_decode_subtitle2   \
4809                   -Wl,--wrap,avcodec_encode_audio2      \