Allow linking to CUDA dynamically instead of dlopen()ing it at runtime
[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 Individual component options:
143   --disable-everything     disable all components listed below
144   --disable-encoder=NAME   disable encoder NAME
145   --enable-encoder=NAME    enable encoder NAME
146   --disable-encoders       disable all encoders
147   --disable-decoder=NAME   disable decoder NAME
148   --enable-decoder=NAME    enable decoder NAME
149   --disable-decoders       disable all decoders
150   --disable-hwaccel=NAME   disable hwaccel NAME
151   --enable-hwaccel=NAME    enable hwaccel NAME
152   --disable-hwaccels       disable all hwaccels
153   --disable-muxer=NAME     disable muxer NAME
154   --enable-muxer=NAME      enable muxer NAME
155   --disable-muxers         disable all muxers
156   --disable-demuxer=NAME   disable demuxer NAME
157   --enable-demuxer=NAME    enable demuxer NAME
158   --disable-demuxers       disable all demuxers
159   --enable-parser=NAME     enable parser NAME
160   --disable-parser=NAME    disable parser NAME
161   --disable-parsers        disable all parsers
162   --enable-bsf=NAME        enable bitstream filter NAME
163   --disable-bsf=NAME       disable bitstream filter NAME
164   --disable-bsfs           disable all bitstream filters
165   --enable-protocol=NAME   enable protocol NAME
166   --disable-protocol=NAME  disable protocol NAME
167   --disable-protocols      disable all protocols
168   --enable-indev=NAME      enable input device NAME
169   --disable-indev=NAME     disable input device NAME
170   --disable-indevs         disable input devices
171   --enable-outdev=NAME     enable output device NAME
172   --disable-outdev=NAME    disable output device NAME
173   --disable-outdevs        disable output devices
174   --disable-devices        disable all devices
175   --enable-filter=NAME     enable filter NAME
176   --disable-filter=NAME    disable filter NAME
177   --disable-filters        disable all filters
178
179 External library support:
180   --enable-avisynth        enable reading of AviSynth script files [no]
181   --enable-bzlib           enable bzlib [autodetect]
182   --enable-cuda            enable dynamically linked CUDA [no]
183   --enable-frei0r          enable frei0r video filtering
184   --enable-gnutls          enable gnutls [no]
185   --enable-libbs2b         enable bs2b DSP library [no]
186   --enable-libcdio         enable audio CD grabbing with libcdio
187   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
188                            and libraw1394 [no]
189   --enable-libdcadec       enable DCA decoding via libdcadec [no]
190   --enable-libfaac         enable AAC encoding via libfaac [no]
191   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
192   --enable-libfreetype     enable libfreetype [no]
193   --enable-libgsm          enable GSM de/encoding via libgsm [no]
194   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
195   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
196   --enable-libmfx          enable HW acceleration through libmfx
197   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
198   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
199   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
200   --enable-libopencv       enable video filtering via libopencv [no]
201   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
202   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
203   --enable-libopus         enable Opus de/encoding via libopus [no]
204   --enable-libpulse        enable Pulseaudio input via libpulse [no]
205   --enable-librtmp         enable RTMP[E] support via librtmp [no]
206   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
207   --enable-libsnappy       enable Snappy compression [no]
208   --enable-libspeex        enable Speex de/encoding via libspeex [no]
209   --enable-libtheora       enable Theora encoding via libtheora [no]
210   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
211   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
212   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
213   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
214   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
215   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
216   --enable-libwebp         enable WebP encoding via libwebp [no]
217   --enable-libx264         enable H.264 encoding via x264 [no]
218   --enable-libx265         enable HEVC encoding via x265 [no]
219   --enable-libxavs         enable AVS encoding via xavs [no]
220   --enable-libxcb          enable X11 grabbing using XCB [no]
221   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
222   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
223   --enable-libxvid         enable Xvid encoding via xvidcore,
224                            native MPEG-4/Xvid encoder exists [no]
225   --enable-mmal            enable decoding via MMAL [no]
226   --enable-nvenc           enable encoding via NVENC [no]
227   --enable-openssl         enable openssl [no]
228   --enable-x11grab         enable X11 grabbing (legacy) [no]
229   --enable-zlib            enable zlib [autodetect]
230
231 Toolchain options:
232   --arch=ARCH              select architecture [$arch]
233   --cpu=CPU                select the minimum required CPU (affects
234                            instruction selection, may crash on older CPUs)
235   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
236   --enable-cross-compile   assume a cross-compiler is used
237   --sysroot=PATH           root of cross-build tree
238   --sysinclude=PATH        location of cross-build system headers
239   --target-os=OS           compiler targets OS [$target_os]
240   --target-exec=CMD        command to run executables on target
241   --target-path=DIR        path to view of build directory on target
242   --target-samples=DIR     path to samples directory on target
243   --toolchain=NAME         set tool defaults according to NAME
244   --nm=NM                  use nm tool
245   --ar=AR                  use archive tool AR [$ar_default]
246   --as=AS                  use assembler AS [$as_default]
247   --cc=CC                  use C compiler CC [$cc_default]
248   --objcc=OCC              use ObjC compiler OCC [$cc_default]
249   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
250   --ld=LD                  use linker LD
251   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
252   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
253   --host-cc=HOSTCC         use host C compiler HOSTCC
254   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
255   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
256   --host-ld=HOSTLD         use host linker HOSTLD
257   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
258   --host-libs=HLIBS        use libs HLIBS when linking for host
259   --host-os=OS             compiler host OS [$target_os]
260   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
261   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
262   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
263   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
264   --extra-libs=ELIBS       add ELIBS [$ELIBS]
265   --extra-version=STRING   version string suffix []
266   --optflags=OPTFLAGS      override optimization-related compiler flags
267   --build-suffix=SUFFIX    library name suffix []
268   --enable-pic             build position-independent code
269   --enable-thumb           compile for Thumb instruction set
270   --enable-lto             use link-time optimization
271   --env="ENV=override"     override the environment variables
272
273 Advanced options (experts only):
274   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
275   --custom-allocator=NAME  use a supported custom allocator
276   --disable-symver         disable symbol versioning
277   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
278   --disable-safe-bitstream-reader
279                            disable buffer boundary checking in bitreaders
280                            (faster, but may crash)
281   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
282   --enable-sram            allow use of on-chip SRAM
283
284 Optimization options (experts only):
285   --disable-asm            disable all assembly optimizations
286   --disable-altivec        disable AltiVec optimizations
287   --disable-vsx            disable VSX optimizations
288   --disable-power8         disable POWER8 optimizations
289   --disable-amd3dnow       disable 3DNow! optimizations
290   --disable-amd3dnowext    disable 3DNow! extended optimizations
291   --disable-mmx            disable MMX optimizations
292   --disable-mmxext         disable MMXEXT optimizations
293   --disable-sse            disable SSE optimizations
294   --disable-sse2           disable SSE2 optimizations
295   --disable-sse3           disable SSE3 optimizations
296   --disable-ssse3          disable SSSE3 optimizations
297   --disable-sse4           disable SSE4 optimizations
298   --disable-sse42          disable SSE4.2 optimizations
299   --disable-avx            disable AVX optimizations
300   --disable-xop            disable XOP optimizations
301   --disable-fma3           disable FMA3 optimizations
302   --disable-fma4           disable FMA4 optimizations
303   --disable-avx2           disable AVX2 optimizations
304   --disable-armv5te        disable armv5te optimizations
305   --disable-armv6          disable armv6 optimizations
306   --disable-armv6t2        disable armv6t2 optimizations
307   --disable-vfp            disable VFP optimizations
308   --disable-neon           disable NEON optimizations
309   --disable-inline-asm     disable use of inline assembly
310   --disable-yasm           disable use of nasm/yasm assembly
311
312 Developer options (useful when working on Libav itself):
313   --disable-debug          disable debugging symbols
314   --enable-debug=LEVEL     set the debug level [$debuglevel]
315   --disable-optimizations  disable compiler optimizations
316   --enable-extra-warnings  enable more compiler warnings
317   --samples=PATH           location of test samples for FATE, if not set use
318                            \$LIBAV_SAMPLES at make invocation time.
319   --enable-neon-clobber-test check NEON registers for clobbering (should be
320                            used only for debugging purposes)
321   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
322                            should be used only for debugging purposes)
323   --enable-random          randomly enable/disable components
324   --disable-random
325   --enable-random=LIST     randomly enable/disable specific components or
326   --disable-random=LIST    component groups. LIST is a comma-separated list
327                            of NAME[:PROB] entries where NAME is a component
328                            (group) and PROB the probability associated with
329                            NAME (default 0.5).
330   --random-seed=VALUE      seed value for --enable/disable-random
331   --disable-valgrind-backtrace do not print a backtrace under Valgrind
332                            (only applies to --disable-optimizations builds)
333
334 NOTE: Object files are built at the place where configure is launched.
335 EOF
336   exit 0
337 }
338
339 quotes='""'
340
341 log(){
342     echo "$@" >> $logfile
343 }
344
345 log_file(){
346     log BEGIN $1
347     i=1
348     while read line; do
349         printf '%5s   %s\n' "${i}" "${line}"
350         i=$(($i+1))
351     done < $1 >> $logfile
352     log END $1
353 }
354
355 echolog(){
356     log "$@"
357     echo "$@"
358 }
359
360 warn(){
361     log "WARNING: $*"
362     WARNINGS="${WARNINGS}WARNING: $*\n"
363 }
364
365 die(){
366     echolog "$@"
367     cat <<EOF
368
369 If you think configure made a mistake, make sure you are using the latest
370 version from Git.  If the latest version fails, report the problem to the
371 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
372 EOF
373     if disabled logging; then
374         cat <<EOF
375 Rerun configure with logging enabled (do not use --disable-logging), and
376 include the log this produces with your report.
377 EOF
378     else
379         cat <<EOF
380 Include the log file "$logfile" produced by configure as this will help
381 solving the problem.
382 EOF
383     fi
384     exit 1
385 }
386
387 # Avoid locale weirdness, besides we really just want to translate ASCII.
388 toupper(){
389     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
390 }
391
392 tolower(){
393     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
394 }
395
396 c_escape(){
397     echo "$*" | sed 's/["\\]/\\\0/g'
398 }
399
400 sh_quote(){
401     v=$(echo "$1" | sed "s/'/'\\\\''/g")
402     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
403     echo "$v"
404 }
405
406 cleanws(){
407     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
408 }
409
410 filter(){
411     pat=$1
412     shift
413     for v; do
414         eval "case $v in $pat) echo $v ;; esac"
415     done
416 }
417
418 filter_out(){
419     pat=$1
420     shift
421     for v; do
422         eval "case $v in $pat) ;; *) echo $v ;; esac"
423     done
424 }
425
426 map(){
427     m=$1
428     shift
429     for v; do eval $m; done
430 }
431
432 add_suffix(){
433     suffix=$1
434     shift
435     for v; do echo ${v}${suffix}; done
436 }
437
438 set_all(){
439     value=$1
440     shift
441     for var in $*; do
442         eval $var=$value
443     done
444 }
445
446 set_weak(){
447     value=$1
448     shift
449     for var; do
450         eval : \${$var:=$value}
451     done
452 }
453
454 sanitize_var_name(){
455     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
456 }
457
458 set_safe(){
459     var=$1
460     shift
461     eval $(sanitize_var_name "$var")='$*'
462 }
463
464 get_safe(){
465     eval echo \$$(sanitize_var_name "$1")
466 }
467
468 pushvar(){
469     for pvar in $*; do
470         eval level=\${${pvar}_level:=0}
471         eval ${pvar}_${level}="\$$pvar"
472         eval ${pvar}_level=$(($level+1))
473     done
474 }
475
476 popvar(){
477     for pvar in $*; do
478         eval level=\${${pvar}_level:-0}
479         test $level = 0 && continue
480         eval level=$(($level-1))
481         eval $pvar="\${${pvar}_${level}}"
482         eval ${pvar}_level=$level
483         eval unset ${pvar}_${level}
484     done
485 }
486
487 enable(){
488     set_all yes $*
489 }
490
491 check_requested() {
492     for var; do
493         eval test "x\$${var#!}_requested" = "xyes" &&  die "${var%%_*} cannot be enabled"
494     done
495 }
496
497 disable(){
498     set_all no $*
499     check_requested $*
500 }
501
502 enable_weak(){
503     set_weak yes $*
504 }
505
506 disable_weak(){
507     set_weak no $*
508 }
509
510 enable_safe(){
511     for var; do
512         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
513     done
514 }
515
516 disable_safe(){
517     for var; do
518         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
519     done
520 }
521
522 do_enable_deep(){
523     for var; do
524         enabled $var && continue
525         eval sel="\$${var}_select"
526         eval sgs="\$${var}_suggest"
527         pushvar var sgs
528         enable_deep $sel
529         popvar sgs
530         enable_deep_weak $sgs
531         popvar var
532     done
533 }
534
535 enable_deep(){
536     do_enable_deep $*
537     enable $*
538 }
539
540 enable_deep_weak(){
541     for var; do
542         disabled $var && continue
543         pushvar var
544         do_enable_deep $var
545         popvar var
546         enable_weak $var
547     done
548 }
549
550 do_enable_deep_force(){
551     for var; do
552         enabled $var && continue
553         eval sel="\$${var}_deps\ \$${var}_deps_any\ \$${var}_select\ \$${var}_suggest\ \$${var}_select_any"
554         pushvar var
555         enable_deep_force $sel
556         popvar var
557     done
558 }
559
560 enable_deep_force(){
561     do_enable_deep_force $*
562     for var; do
563         is_in $var $ALL_COMPONENTS $COMPONENT_LIST $LIBRARY_LIST && enable $var
564     done
565 }
566
567 request(){
568     disable $* # force the refresh of the dependencies
569     for var; do
570         enable ${var}_requested
571     done
572     enable_deep_force $*
573     enable $*
574 }
575
576 enabled(){
577     test "${1#!}" = "$1" && op== || op=!=
578     eval test "x\$${1#!}" $op "xyes"
579 }
580
581 disabled(){
582     test "${1#!}" = "$1" && op== || op=!=
583     eval test "x\$${1#!}" $op "xno"
584 }
585
586 enabled_all(){
587     for opt; do
588         enabled $opt || return 1
589     done
590 }
591
592 disabled_all(){
593     for opt; do
594         disabled $opt || return 1
595     done
596 }
597
598 enabled_any(){
599     for opt; do
600         enabled $opt && return 0
601     done
602 }
603
604 disabled_any(){
605     for opt; do
606         disabled $opt && return 0
607     done
608     return 1
609 }
610
611 set_default(){
612     for opt; do
613         eval : \${$opt:=\$${opt}_default}
614     done
615 }
616
617 is_in(){
618     value=$1
619     shift
620     for var in $*; do
621         [ $var = $value ] && return 0
622     done
623     return 1
624 }
625
626 do_check_deps(){
627     for cfg; do
628         cfg="${cfg#!}"
629         enabled ${cfg}_checking && die "Circular dependency for $cfg."
630         disabled ${cfg}_checking && continue
631         enable ${cfg}_checking
632         append allopts $cfg
633
634         eval dep_all="\$${cfg}_deps"
635         eval dep_any="\$${cfg}_deps_any\ \$${cfg}_select_any"
636         eval dep_sel="\$${cfg}_select"
637         eval dep_sgs="\$${cfg}_suggest"
638         eval dep_ifa="\$${cfg}_if"
639         eval dep_ifn="\$${cfg}_if_any"
640
641         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
642         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
643         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
644
645         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
646         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
647         enabled_all  $dep_all || disable $cfg
648         enabled_any  $dep_any || disable $cfg
649         disabled_any $dep_sel && disable $cfg
650
651         if enabled $cfg; then
652             enable_deep $dep_sel
653             enable_deep_weak $dep_sgs
654         fi
655
656         disable ${cfg}_checking
657     done
658 }
659
660 check_deps(){
661     unset allopts
662
663     do_check_deps "$@"
664
665     for cfg in $allopts; do
666         enabled $cfg || continue
667         eval dep_extralibs="\$${cfg}_extralibs"
668         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
669     done
670 }
671
672 print_config(){
673     pfx=$1
674     files=$2
675     shift 2
676     map 'eval echo "$v \${$v:-no}"' "$@" |
677     awk "BEGIN { split(\"$files\", files) }
678         {
679             c = \"$pfx\" toupper(\$1);
680             v = \$2;
681             sub(/yes/, 1, v);
682             sub(/no/,  0, v);
683             for (f in files) {
684                 file = files[f];
685                 if (file ~ /\\.h\$/) {
686                     printf(\"#define %s %d\\n\", c, v) >>file;
687                 } else if (file ~ /\\.asm\$/) {
688                     printf(\"%%define %s %d\\n\", c, v) >>file;
689                 } else if (file ~ /\\.mak\$/) {
690                     n = -v ? \"\" : \"!\";
691                     printf(\"%s%s=yes\\n\", n, c) >>file;
692                 }
693             }
694         }"
695 }
696
697 print_enabled(){
698     suf=$1
699     shift
700     for v; do
701         enabled $v && printf "%s\n" ${v%$suf};
702     done
703 }
704
705 append(){
706     var=$1
707     shift
708     eval "$var=\"\$$var $*\""
709 }
710
711 prepend(){
712     var=$1
713     shift
714     eval "$var=\"$* \$$var\""
715 }
716
717 unique(){
718     var=$1
719     uniq_list=""
720     for tok in $(eval echo \$$var); do
721         uniq_list="$(filter_out $tok $uniq_list) $tok"
722     done
723     eval "$var=\"${uniq_list}\""
724 }
725
726 add_cppflags(){
727     append CPPFLAGS "$@"
728 }
729
730 add_cflags(){
731     append CFLAGS $($cflags_filter "$@")
732 }
733
734 add_asflags(){
735     append ASFLAGS $($asflags_filter "$@")
736 }
737
738 add_objcflags(){
739     append OBJCFLAGS $($objcflags_filter "$@")
740 }
741
742 add_ldflags(){
743     append LDFLAGS $($ldflags_filter "$@")
744 }
745
746 add_ldexeflags(){
747     append LDEXEFLAGS $($ldflags_filter "$@")
748 }
749
750 add_stripflags(){
751     append STRIPFLAGS "$@"
752 }
753
754 add_extralibs(){
755     prepend extralibs $($ldflags_filter "$@")
756 }
757
758 add_host_cppflags(){
759     append host_cppflags "$@"
760 }
761
762 add_host_cflags(){
763     append host_cflags $($host_cflags_filter "$@")
764 }
765
766 add_host_ldflags(){
767     append host_ldflags $($host_ldflags_filter "$@")
768 }
769
770 add_compat(){
771     append compat_objs $1
772     shift
773     map 'add_cppflags -D$v' "$@"
774 }
775
776 check_cmd(){
777     log "$@"
778     "$@" >> $logfile 2>&1
779 }
780
781 cc_o(){
782     eval printf '%s\\n' $CC_O
783 }
784
785 cc_e(){
786     eval printf '%s\\n' $CC_E
787 }
788
789 check_cc(){
790     log check_cc "$@"
791     cat > $TMPC
792     log_file $TMPC
793     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
794 }
795
796 check_objcc(){
797     log check_objcc "$@"
798     cat > $TMPC
799     log_file $TMPC
800     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
801 }
802
803 check_cpp(){
804     log check_cpp "$@"
805     cat > $TMPC
806     log_file $TMPC
807     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
808 }
809
810 as_o(){
811     eval printf '%s\\n' $AS_O
812 }
813
814 check_as(){
815     log check_as "$@"
816     cat > $TMPS
817     log_file $TMPS
818     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
819 }
820
821 check_inline_asm(){
822     log check_inline_asm "$@"
823     name="$1"
824     code="$2"
825     shift 2
826     disable $name
827     check_cc "$@" <<EOF && enable $name
828 void foo(void){ __asm__ volatile($code); }
829 EOF
830 }
831
832 check_insn(){
833     log check_insn "$@"
834     check_inline_asm ${1}_inline "\"$2\""
835     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
836 }
837
838 check_yasm(){
839     log check_yasm "$@"
840     echo "$1" > $TMPS
841     log_file $TMPS
842     shift 1
843     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
844 }
845
846 ld_o(){
847     eval printf '%s\\n' $LD_O
848 }
849
850 check_ld(){
851     log check_ld "$@"
852     flags=$(filter_out '-l*' "$@")
853     libs=$(filter '-l*' "$@")
854     check_cc $($cflags_filter $flags) || return
855     flags=$($ldflags_filter $flags)
856     libs=$($ldflags_filter $libs)
857     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
858 }
859
860 print_include(){
861     hdr=$1
862     test "${hdr%.h}" = "${hdr}" &&
863         echo "#include $hdr"    ||
864         echo "#include <$hdr>"
865 }
866
867 check_code(){
868     log check_code "$@"
869     check=$1
870     headers=$2
871     code=$3
872     shift 3
873     {
874         for hdr in $headers; do
875             print_include $hdr
876         done
877         echo "int main(void) { $code; return 0; }"
878     } | check_$check "$@"
879 }
880
881 check_cppflags(){
882     log check_cppflags "$@"
883     check_cc "$@" <<EOF && append CPPFLAGS "$@"
884 int x;
885 EOF
886 }
887
888 test_cflags(){
889     log test_cflags "$@"
890     set -- $($cflags_filter "$@")
891     check_cc "$@" <<EOF
892 int x;
893 EOF
894 }
895
896 check_cflags(){
897     log check_cflags "$@"
898     test_cflags "$@" && add_cflags "$@"
899 }
900
901 test_objcflags(){
902     log test_cflags "$@"
903     set -- $($cflags_filter "$@")
904     check_objcc "$@" <<EOF
905 int x;
906 EOF
907 }
908
909 check_objcflags(){
910     log check_cflags "$@"
911     test_objcflags "$@" && add_objcflags "$@"
912 }
913
914 test_ldflags(){
915     log test_ldflags "$@"
916     check_ld "$@" <<EOF
917 int main(void){ return 0; }
918 EOF
919 }
920
921 check_ldflags(){
922     log check_ldflags "$@"
923     test_ldflags "$@" && add_ldflags "$@"
924 }
925
926 test_stripflags(){
927     log test_stripflags "$@"
928     # call check_cc to get a fresh TMPO
929     check_cc <<EOF
930 int main(void) { return 0; }
931 EOF
932     check_cmd $strip $STRIPFLAGS "$@" $TMPO
933 }
934
935 check_stripflags(){
936     log check_stripflags "$@"
937     test_stripflags "$@" && add_stripflags "$@"
938 }
939
940 check_header(){
941     log check_header "$@"
942     header=$1
943     shift
944     disable_safe $header
945     check_cpp "$@" <<EOF && enable_safe $header
946 #include <$header>
947 int x;
948 EOF
949 }
950
951 check_func(){
952     log check_func "$@"
953     func=$1
954     shift
955     disable $func
956     check_ld "$@" <<EOF && enable $func
957 extern int $func();
958 int main(void){ $func(); }
959 EOF
960 }
961
962 check_mathfunc(){
963     log check_mathfunc "$@"
964     func=$1
965     narg=$2
966     shift 2
967     test $narg = 2 && args="f, g" || args="f"
968     disable $func
969     check_ld "$@" <<EOF && enable $func
970 #include <math.h>
971 float foo(float f, float g) { return $func($args); }
972 int main(void){ return 0; }
973 EOF
974 }
975
976 check_func_headers(){
977     log check_func_headers "$@"
978     headers=$1
979     funcs=$2
980     shift 2
981     {
982         for hdr in $headers; do
983             print_include $hdr
984         done
985         for func in $funcs; do
986             echo "long check_$func(void) { return (long) $func; }"
987         done
988         echo "int main(void) { return 0; }"
989     } | check_ld "$@" && enable $funcs && enable_safe $headers
990 }
991
992 check_cpp_condition(){
993     log check_cpp_condition "$@"
994     header=$1
995     condition=$2
996     shift 2
997     check_cpp "$@" <<EOF
998 #include <$header>
999 #if !($condition)
1000 #error "unsatisfied condition: $condition"
1001 #endif
1002 EOF
1003 }
1004
1005 check_lib(){
1006     log check_lib "$@"
1007     header="$1"
1008     func="$2"
1009     shift 2
1010     check_header $header && check_func $func "$@" && add_extralibs "$@"
1011 }
1012
1013 check_lib2(){
1014     log check_lib2 "$@"
1015     headers="$1"
1016     funcs="$2"
1017     shift 2
1018     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1019 }
1020
1021 check_pkg_config(){
1022     log check_pkg_config "$@"
1023     pkg="$1"
1024     headers="$2"
1025     funcs="$3"
1026     shift 3
1027     check_cmd $pkg_config --exists --print-errors $pkg || return
1028     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1029     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1030     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1031         set_safe "${pkg}_cflags" $pkg_cflags   &&
1032         set_safe "${pkg}_libs"   $pkg_libs
1033 }
1034
1035 check_exec(){
1036     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1037 }
1038
1039 check_exec_crash(){
1040     code=$(cat)
1041
1042     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1043     # are safe but may not be available everywhere.  Thus we use
1044     # raise(SIGTERM) instead.  The check is run in a subshell so we
1045     # can redirect the "Terminated" message from the shell.  SIGBUS
1046     # is not defined by standard C so it is used conditionally.
1047
1048     (check_exec "$@") >> $logfile 2>&1 <<EOF
1049 #include <signal.h>
1050 static void sighandler(int sig){
1051     raise(SIGTERM);
1052 }
1053 int foo(void){
1054     $code
1055 }
1056 int (*func_ptr)(void) = foo;
1057 int main(void){
1058     signal(SIGILL, sighandler);
1059     signal(SIGFPE, sighandler);
1060     signal(SIGSEGV, sighandler);
1061 #ifdef SIGBUS
1062     signal(SIGBUS, sighandler);
1063 #endif
1064     return func_ptr();
1065 }
1066 EOF
1067 }
1068
1069 check_type(){
1070     log check_type "$@"
1071     headers=$1
1072     type=$2
1073     shift 2
1074     disable_safe "$type"
1075     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1076 }
1077
1078 check_struct(){
1079     log check_struct "$@"
1080     headers=$1
1081     struct=$2
1082     member=$3
1083     shift 3
1084     disable_safe "${struct}_${member}"
1085     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1086         enable_safe "${struct}_${member}"
1087 }
1088
1089 check_builtin(){
1090     log check_builtin "$@"
1091     name=$1
1092     headers=$2
1093     builtin=$3
1094     shift 3
1095     disable "$name"
1096     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1097 }
1098
1099 check_compile_assert(){
1100     log check_compile_assert "$@"
1101     name=$1
1102     headers=$2
1103     condition=$3
1104     shift 3
1105     disable "$name"
1106     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1107 }
1108
1109 require(){
1110     name="$1"
1111     header="$2"
1112     func="$3"
1113     shift 3
1114     check_lib $header $func "$@" || die "ERROR: $name not found"
1115 }
1116
1117 require2(){
1118     name="$1"
1119     headers="$2"
1120     func="$3"
1121     shift 3
1122     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1123 }
1124
1125 require_pkg_config(){
1126     pkg="$1"
1127     check_pkg_config "$@" || die "ERROR: $pkg not found"
1128     add_cflags    $(get_safe "${pkg}_cflags")
1129     add_extralibs $(get_safe "${pkg}_libs")
1130 }
1131
1132 hostcc_e(){
1133     eval printf '%s\\n' $HOSTCC_E
1134 }
1135
1136 hostcc_o(){
1137     eval printf '%s\\n' $HOSTCC_O
1138 }
1139
1140 check_host_cc(){
1141     log check_host_cc "$@"
1142     cat > $TMPC
1143     log_file $TMPC
1144     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1145 }
1146
1147 check_host_cpp(){
1148     log check_host_cpp "$@"
1149     cat > $TMPC
1150     log_file $TMPC
1151     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1152 }
1153
1154 check_host_cppflags(){
1155     log check_host_cppflags "$@"
1156     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1157 int x;
1158 EOF
1159 }
1160
1161 check_host_cflags(){
1162     log check_host_cflags "$@"
1163     set -- $($host_cflags_filter "$@")
1164     check_host_cc "$@" <<EOF && append host_cflags "$@"
1165 int x;
1166 EOF
1167 }
1168
1169 check_host_cpp_condition(){
1170     log check_host_cpp_condition "$@"
1171     header=$1
1172     condition=$2
1173     shift 2
1174     check_host_cpp "$@" <<EOF
1175 #include <$header>
1176 #if !($condition)
1177 #error "unsatisfied condition: $condition"
1178 #endif
1179 EOF
1180 }
1181
1182 apply(){
1183     file=$1
1184     shift
1185     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1186 }
1187
1188 cp_if_changed(){
1189     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1190     mkdir -p "$(dirname $2)"
1191     $cp_f "$1" "$2"
1192 }
1193
1194 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1195 # system-dependent things.
1196
1197 AVCODEC_COMPONENTS="
1198     bsfs
1199     decoders
1200     encoders
1201     hwaccels
1202     parsers
1203 "
1204
1205 AVDEVICE_COMPONENTS="
1206     indevs
1207     outdevs
1208 "
1209 AVFILTER_COMPONENTS="
1210     filters
1211 "
1212 AVFORMAT_COMPONENTS="
1213     demuxers
1214     muxers
1215     protocols
1216 "
1217
1218 AVRESAMPLE_COMPONENTS=""
1219 AVUTIL_COMPONENTS=""
1220
1221 COMPONENT_LIST="
1222     $AVCODEC_COMPONENTS
1223     $AVDEVICE_COMPONENTS
1224     $AVFILTER_COMPONENTS
1225     $AVFORMAT_COMPONENTS
1226     $AVRESAMPLE_COMPONENTS
1227     $AVUTIL_COMPONENTS
1228 "
1229
1230 EXAMPLE_LIST="
1231     avcodec_example
1232     filter_audio_example
1233     metadata_example
1234     output_example
1235     qsvdec_example
1236     transcode_aac_example
1237 "
1238
1239 EXTERNAL_LIBRARY_LIST="
1240     avisynth
1241     bzlib
1242     cuda
1243     frei0r
1244     gnutls
1245     libbs2b
1246     libcdio
1247     libdc1394
1248     libdcadec
1249     libfaac
1250     libfdk_aac
1251     libfontconfig
1252     libfreetype
1253     libgsm
1254     libilbc
1255     libkvazaar
1256     libmfx
1257     libmp3lame
1258     libopencore_amrnb
1259     libopencore_amrwb
1260     libopencv
1261     libopenh264
1262     libopenjpeg
1263     libopus
1264     libpulse
1265     librtmp
1266     libschroedinger
1267     libsnappy
1268     libspeex
1269     libtheora
1270     libtwolame
1271     libvo_aacenc
1272     libvo_amrwbenc
1273     libvorbis
1274     libvpx
1275     libwavpack
1276     libwebp
1277     libx264
1278     libx265
1279     libxavs
1280     libxcb
1281     libxcb_shm
1282     libxcb_xfixes
1283     libxvid
1284     mmal
1285     nvenc
1286     openssl
1287     x11grab
1288     zlib
1289 "
1290
1291 FEATURE_LIST="
1292     gray
1293     hardcoded_tables
1294     runtime_cpudetect
1295     safe_bitstream_reader
1296     shared
1297     small
1298     sram
1299     static
1300     swscale_alpha
1301 "
1302
1303 HWACCEL_LIST="
1304     d3d11va
1305     dxva2
1306     vaapi
1307     vda
1308     vdpau
1309 "
1310
1311 LIBRARY_LIST="
1312     avcodec
1313     avdevice
1314     avfilter
1315     avformat
1316     avresample
1317     avutil
1318     swscale
1319 "
1320
1321 LICENSE_LIST="
1322     gpl
1323     nonfree
1324     version3
1325 "
1326
1327 PROGRAM_LIST="
1328     avconv
1329     avplay
1330     avprobe
1331 "
1332
1333 SUBSYSTEM_LIST="
1334     dct
1335     doc
1336     error_resilience
1337     faan
1338     fft
1339     lsp
1340     lzo
1341     mdct
1342     network
1343     rdft
1344 "
1345
1346 CONFIG_LIST="
1347     $COMPONENT_LIST
1348     $EXAMPLE_LIST
1349     $EXTERNAL_LIBRARY_LIST
1350     $FEATURE_LIST
1351     $HWACCEL_LIST
1352     $LICENSE_LIST
1353     $LIBRARY_LIST
1354     $PROGRAM_LIST
1355     $SUBSYSTEM_LIST
1356     memalign_hack
1357     neon_clobber_test
1358     pic
1359     pod2man
1360     texi2html
1361     thumb
1362     valgrind_backtrace
1363     xmm_clobber_test
1364 "
1365
1366 THREADS_LIST="
1367     pthreads
1368     w32threads
1369 "
1370
1371 ATOMICS_LIST="
1372     atomics_gcc
1373     atomics_suncc
1374     atomics_win32
1375 "
1376
1377 ARCH_LIST="
1378     aarch64
1379     alpha
1380     arm
1381     avr32
1382     avr32_ap
1383     avr32_uc
1384     bfin
1385     ia64
1386     m68k
1387     mips
1388     mips64
1389     parisc
1390     ppc
1391     ppc64
1392     s390
1393     sh4
1394     sparc
1395     sparc64
1396     tilegx
1397     tilepro
1398     tomi
1399     x86
1400     x86_32
1401     x86_64
1402 "
1403
1404 ARCH_EXT_LIST_ARM="
1405     armv5te
1406     armv6
1407     armv6t2
1408     armv8
1409     neon
1410     vfp
1411     vfpv3
1412 "
1413
1414 ARCH_EXT_LIST_X86_SIMD="
1415     amd3dnow
1416     amd3dnowext
1417     avx
1418     avx2
1419     fma3
1420     fma4
1421     mmx
1422     mmxext
1423     sse
1424     sse2
1425     sse3
1426     sse4
1427     sse42
1428     ssse3
1429     xop
1430 "
1431
1432 ARCH_EXT_LIST_PPC="
1433     altivec
1434     dcbzl
1435     ldbrx
1436     power8
1437     ppc4xx
1438     vsx
1439 "
1440
1441 ARCH_EXT_LIST_X86="
1442     $ARCH_EXT_LIST_X86_SIMD
1443     cpunop
1444     i686
1445 "
1446
1447 ARCH_EXT_LIST_MIPS="
1448     loongson
1449     mips32r1
1450     mips64r1
1451     mips32r2
1452     mips64r2
1453     mips32r6
1454     mips64r6
1455 "
1456
1457 ARCH_EXT_LIST="
1458     $ARCH_EXT_LIST_ARM
1459     $ARCH_EXT_LIST_MIPS
1460     $ARCH_EXT_LIST_PPC
1461     $ARCH_EXT_LIST_X86
1462     vis
1463 "
1464
1465 ARCH_FEATURES="
1466     aligned_stack
1467     fast_64bit
1468     fast_clz
1469     fast_cmov
1470     local_aligned_8
1471     local_aligned_16
1472     simd_align_16
1473 "
1474
1475 BUILTIN_LIST="
1476     atomic_cas_ptr
1477     machine_rw_barrier
1478     MemoryBarrier
1479     mm_empty
1480     rdtsc
1481     sync_val_compare_and_swap
1482 "
1483 HAVE_LIST_CMDLINE="
1484     inline_asm
1485     symver
1486     yasm
1487 "
1488
1489 HAVE_LIST_PUB="
1490     bigendian
1491     fast_unaligned
1492 "
1493
1494 HEADERS_LIST="
1495     AVFoundation_AVFoundation_h
1496     alsa_asoundlib_h
1497     altivec_h
1498     arpa_inet_h
1499     cdio_paranoia_h
1500     cdio_paranoia_paranoia_h
1501     dev_bktr_ioctl_bt848_h
1502     dev_bktr_ioctl_meteor_h
1503     dev_ic_bt8xx_h
1504     dev_video_bktr_ioctl_bt848_h
1505     dev_video_meteor_ioctl_meteor_h
1506     direct_h
1507     dlfcn_h
1508     d3d11_h
1509     dxva_h
1510     gsm_h
1511     io_h
1512     mach_mach_time_h
1513     machine_ioctl_bt848_h
1514     machine_ioctl_meteor_h
1515     malloc_h
1516     poll_h
1517     sndio_h
1518     soundcard_h
1519     sys_mman_h
1520     sys_param_h
1521     sys_resource_h
1522     sys_select_h
1523     sys_soundcard_h
1524     sys_time_h
1525     sys_un_h
1526     sys_videoio_h
1527     unistd_h
1528     valgrind_valgrind_h
1529     windows_h
1530     winsock2_h
1531 "
1532
1533 INTRINSICS_LIST="
1534     intrinsics_neon
1535 "
1536
1537 MATH_FUNCS="
1538     atanf
1539     atan2f
1540     cbrtf
1541     cosf
1542     exp2
1543     exp2f
1544     expf
1545     isinf
1546     isnan
1547     ldexpf
1548     llrint
1549     llrintf
1550     log2
1551     log2f
1552     log10f
1553     lrint
1554     lrintf
1555     powf
1556     rint
1557     round
1558     roundf
1559     sinf
1560     trunc
1561     truncf
1562 "
1563
1564 SYSTEM_FUNCS="
1565     aligned_malloc
1566     clock_gettime
1567     closesocket
1568     CommandLineToArgvW
1569     CoTaskMemFree
1570     CryptGenRandom
1571     dlopen
1572     fcntl
1573     flt_lim
1574     fork
1575     getaddrinfo
1576     gethrtime
1577     getopt
1578     GetProcessAffinityMask
1579     GetProcessMemoryInfo
1580     GetProcessTimes
1581     getrusage
1582     GetSystemTimeAsFileTime
1583     gettimeofday
1584     gmtime_r
1585     inet_aton
1586     isatty
1587     jack_port_get_latency_range
1588     LoadLibrary
1589     localtime_r
1590     mach_absolute_time
1591     MapViewOfFile
1592     memalign
1593     mkstemp
1594     mmap
1595     mprotect
1596     nanosleep
1597     posix_memalign
1598     sched_getaffinity
1599     SetConsoleTextAttribute
1600     setmode
1601     setrlimit
1602     Sleep
1603     strerror_r
1604     sysconf
1605     sysctl
1606     usleep
1607     VirtualAlloc
1608 "
1609
1610 TOOLCHAIN_FEATURES="
1611     as_dn_directive
1612     as_func
1613     as_object_arch
1614     asm_mod_q
1615     attribute_may_alias
1616     attribute_packed
1617     ebp_available
1618     ebx_available
1619     gnu_as
1620     ibm_asm
1621     inline_asm_labels
1622     pragma_deprecated
1623     symver_asm_label
1624     symver_gnu_asm
1625     vfp_args
1626     xform_asm
1627     xmm_clobbers
1628 "
1629
1630 TYPES_LIST="
1631     CONDITION_VARIABLE_Ptr
1632     socklen_t
1633     struct_addrinfo
1634     struct_group_source_req
1635     struct_ip_mreq_source
1636     struct_ipv6_mreq
1637     struct_pollfd
1638     struct_rusage_ru_maxrss
1639     struct_sockaddr_in6
1640     struct_sockaddr_sa_len
1641     struct_sockaddr_storage
1642     struct_v4l2_frmivalenum_discrete
1643 "
1644
1645 HAVE_LIST="
1646     $ARCH_EXT_LIST
1647     $(add_suffix _external $ARCH_EXT_LIST)
1648     $(add_suffix _inline   $ARCH_EXT_LIST)
1649     $ARCH_FEATURES
1650     $ATOMICS_LIST
1651     $BUILTIN_LIST
1652     $HAVE_LIST_CMDLINE
1653     $HAVE_LIST_PUB
1654     $HEADERS_LIST
1655     $INTRINSICS_LIST
1656     $MATH_FUNCS
1657     $SYSTEM_FUNCS
1658     $THREADS_LIST
1659     $TOOLCHAIN_FEATURES
1660     $TYPES_LIST
1661     atomics_native
1662     dos_paths
1663     dxva2_lib
1664     libc_msvcrt
1665     libdc1394_1
1666     libdc1394_2
1667     sdl
1668     section_data_rel_ro
1669     threads
1670     vaapi_x11
1671     vdpau_x11
1672     xlib
1673 "
1674
1675 # options emitted with CONFIG_ prefix but not available on the command line
1676 CONFIG_EXTRA="
1677     aandcttables
1678     ac3dsp
1679     audio_frame_queue
1680     audiodsp
1681     blockdsp
1682     bswapdsp
1683     cabac
1684     dirac_parse
1685     dvprofile
1686     faandct
1687     faanidct
1688     fdctdsp
1689     flacdsp
1690     fmtconvert
1691     g722dsp
1692     gcrypt
1693     gmp
1694     golomb
1695     gplv3
1696     h263dsp
1697     h264chroma
1698     h264dsp
1699     h264pred
1700     h264qpel
1701     hpeldsp
1702     huffman
1703     huffyuvdsp
1704     huffyuvencdsp
1705     idctdsp
1706     iirfilter
1707     imdct15
1708     intrax8
1709     ividsp
1710     jpegtables
1711     libx262
1712     lgplv3
1713     lpc
1714     lzf
1715     me_cmp
1716     mpeg_er
1717     mpegaudio
1718     mpegaudiodsp
1719     mpegvideo
1720     mpegvideoenc
1721     mss34dsp
1722     pixblockdsp
1723     qpeldsp
1724     qsv
1725     qsvdec
1726     qsvenc
1727     rangecoder
1728     riffdec
1729     riffenc
1730     rtpdec
1731     rtpenc_chain
1732     rv34dsp
1733     sinewin
1734     snappy
1735     startcode
1736     texturedsp
1737     texturedspenc
1738     tpeldsp
1739     videodsp
1740     vp3dsp
1741     vp56dsp
1742     vp8dsp
1743     wma_freqs
1744     wmv2dsp
1745 "
1746
1747 CMDLINE_SELECT="
1748     $ARCH_EXT_LIST
1749     $CONFIG_LIST
1750     $HAVE_LIST_CMDLINE
1751     $THREADS_LIST
1752     asm
1753     cross_compile
1754     debug
1755     extra_warnings
1756     logging
1757     lto
1758     optimizations
1759     rpath
1760 "
1761
1762 PATHS_LIST="
1763     bindir
1764     datadir
1765     docdir
1766     incdir
1767     libdir
1768     mandir
1769     prefix
1770     shlibdir
1771 "
1772
1773 CMDLINE_SET="
1774     $PATHS_LIST
1775     ar
1776     arch
1777     as
1778     build_suffix
1779     cc
1780     objcc
1781     cpu
1782     cross_prefix
1783     custom_allocator
1784     dep_cc
1785     env
1786     extra_version
1787     host_cc
1788     host_cflags
1789     host_ld
1790     host_ldflags
1791     host_libs
1792     host_os
1793     ld
1794     logfile
1795     malloc_prefix
1796     nm
1797     optflags
1798     pkg_config
1799     pkg_config_flags
1800     random_seed
1801     samples
1802     sysinclude
1803     sysroot
1804     target_exec
1805     target_os
1806     target_path
1807     target_samples
1808     toolchain
1809 "
1810
1811 CMDLINE_APPEND="
1812     extra_cflags
1813     extra_objcflags
1814     host_cppflags
1815 "
1816
1817 # code dependency declarations
1818
1819 # architecture extensions
1820
1821 armv5te_deps="arm"
1822 armv6_deps="arm"
1823 armv6t2_deps="arm"
1824 armv8_deps="aarch64"
1825 neon_deps_any="aarch64 arm"
1826 intrinsics_neon_deps="neon"
1827 vfp_deps_any="aarch64 arm"
1828 vfpv3_deps="vfp"
1829
1830 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1831
1832 altivec_deps="ppc"
1833 ppc4xx_deps="ppc"
1834 vsx_deps="altivec"
1835 power8_deps="vsx"
1836
1837 cpunop_deps="i686"
1838 x86_64_select="i686"
1839 x86_64_suggest="fast_cmov"
1840
1841 amd3dnow_deps="mmx"
1842 amd3dnowext_deps="amd3dnow"
1843 i686_deps="x86"
1844 mmx_deps="x86"
1845 mmxext_deps="mmx"
1846 sse_deps="mmxext"
1847 sse2_deps="sse"
1848 sse3_deps="sse2"
1849 ssse3_deps="sse3"
1850 sse4_deps="ssse3"
1851 sse42_deps="sse4"
1852 avx_deps="sse42"
1853 xop_deps="avx"
1854 fma3_deps="avx"
1855 fma4_deps="avx"
1856 avx2_deps="avx"
1857
1858 mmx_external_deps="yasm"
1859 mmx_inline_deps="inline_asm"
1860 mmx_suggest="mmx_external mmx_inline"
1861
1862 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1863     eval dep=\$${ext}_deps
1864     eval ${ext}_external_deps='"${dep}_external"'
1865     eval ${ext}_inline_deps='"${dep}_inline"'
1866     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1867 done
1868
1869 aligned_stack_if_any="aarch64 ppc x86"
1870 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1871 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1872 fast_unaligned_if_any="aarch64 ppc x86"
1873 simd_align_16_if_any="altivec neon sse"
1874
1875 # system capabilities
1876 symver_if_any="symver_asm_label symver_gnu_asm"
1877 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1878
1879 # threading support
1880 atomics_gcc_if="sync_val_compare_and_swap"
1881 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1882 atomics_win32_if="MemoryBarrier"
1883 atomics_native_if_any="$ATOMICS_LIST"
1884 w32threads_deps="atomics_native"
1885 threads_if_any="$THREADS_LIST"
1886
1887 # subsystems
1888 dct_select="rdft"
1889 dirac_parse_select="golomb"
1890 error_resilience_select="me_cmp"
1891 faandct_deps="faan fdctdsp"
1892 faanidct_deps="faan idctdsp"
1893 intrax8_select="error_resilience"
1894 mdct_select="fft"
1895 rdft_select="fft"
1896 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1897 mpeg_er_select="error_resilience"
1898 mpegaudio_select="mpegaudiodsp"
1899 mpegaudiodsp_select="dct"
1900 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1901 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1902 nvenc_deps_any="dlopen LoadLibrary"
1903 nvenc_extralibs='$ldl'
1904 qsvdec_select="qsv"
1905 qsvenc_select="qsv"
1906
1907 # decoders / encoders
1908 aac_decoder_select="imdct15 mdct sinewin"
1909 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1910 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1911 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1912 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1913 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1914 adpcm_g722_decoder_select="g722dsp"
1915 adpcm_g722_encoder_select="g722dsp"
1916 aic_decoder_select="golomb idctdsp"
1917 alac_encoder_select="lpc"
1918 als_decoder_select="bswapdsp"
1919 amrnb_decoder_select="lsp"
1920 amrwb_decoder_select="lsp"
1921 amv_decoder_select="sp5x_decoder"
1922 ape_decoder_select="bswapdsp"
1923 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1924 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1925 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1926 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1927 atrac1_decoder_select="mdct sinewin"
1928 atrac3_decoder_select="mdct"
1929 atrac3p_decoder_select="mdct sinewin"
1930 bink_decoder_select="blockdsp hpeldsp"
1931 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1932 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1933 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1934 cllc_decoder_select="bswapdsp"
1935 comfortnoise_encoder_select="lpc"
1936 cook_decoder_select="audiodsp mdct sinewin"
1937 cscd_decoder_select="lzo"
1938 cscd_decoder_suggest="zlib"
1939 dca_decoder_select="fmtconvert mdct"
1940 dds_decoder_select="texturedsp"
1941 dnxhd_decoder_select="blockdsp idctdsp"
1942 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1943 dvvideo_decoder_select="dvprofile idctdsp"
1944 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1945 dxa_decoder_deps="zlib"
1946 dxv_decoder_select="lzf texturedsp"
1947 eac3_decoder_select="ac3_decoder"
1948 eac3_encoder_select="ac3_encoder"
1949 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1950 eatgq_decoder_select="aandcttables idctdsp"
1951 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1952 exr_decoder_deps="zlib"
1953 ffv1_decoder_select="golomb rangecoder"
1954 ffv1_encoder_select="rangecoder"
1955 ffvhuff_decoder_select="huffyuv_decoder"
1956 ffvhuff_encoder_select="huffyuv_encoder"
1957 fic_decoder_select="golomb"
1958 flac_decoder_select="flacdsp golomb"
1959 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1960 flashsv_decoder_deps="zlib"
1961 flashsv_encoder_deps="zlib"
1962 flashsv2_decoder_deps="zlib"
1963 flv_decoder_select="h263_decoder"
1964 flv_encoder_select="h263_encoder"
1965 fourxm_decoder_select="blockdsp bswapdsp"
1966 fraps_decoder_select="bswapdsp huffman"
1967 g2m_decoder_deps="zlib"
1968 g2m_decoder_select="blockdsp idctdsp jpegtables"
1969 h261_decoder_select="mpeg_er mpegvideo"
1970 h261_encoder_select="aandcttables mpegvideoenc"
1971 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1972 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1973 h263i_decoder_select="h263_decoder"
1974 h263p_encoder_select="h263_encoder"
1975 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1976 h264_decoder_suggest="error_resilience"
1977 h264_nvenc_encoder_deps="nvenc"
1978 h264_qsv_decoder_deps="libmfx"
1979 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1980 h264_qsv_encoder_deps="libmfx"
1981 h264_qsv_encoder_select="qsvenc"
1982 hap_decoder_select="snappy texturedsp"
1983 hap_encoder_deps="libsnappy"
1984 hap_encoder_select="texturedspenc"
1985 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1986 hevc_nvenc_encoder_deps="nvenc"
1987 hevc_qsv_encoder_deps="libmfx"
1988 hevc_qsv_decoder_deps="libmfx"
1989 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1990 hevc_qsv_encoder_select="qsvenc"
1991 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1992 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1993 iac_decoder_select="imc_decoder"
1994 imc_decoder_select="bswapdsp fft mdct sinewin"
1995 indeo3_decoder_select="hpeldsp"
1996 indeo4_decoder_select="ividsp"
1997 indeo5_decoder_select="ividsp"
1998 interplay_video_decoder_select="hpeldsp"
1999 jpegls_decoder_select="golomb mjpeg_decoder"
2000 jpegls_encoder_select="golomb"
2001 jv_decoder_select="blockdsp"
2002 lagarith_decoder_select="huffyuvdsp"
2003 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2004 loco_decoder_select="golomb"
2005 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2006 metasound_decoder_select="lsp mdct sinewin"
2007 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2008 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2009 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2010 mjpegb_decoder_select="mjpeg_decoder"
2011 mlp_decoder_select="mlp_parser"
2012 motionpixels_decoder_select="bswapdsp"
2013 mp1_decoder_select="mpegaudio"
2014 mp1float_decoder_select="mpegaudio"
2015 mp2_decoder_select="mpegaudio"
2016 mp2float_decoder_select="mpegaudio"
2017 mp3_decoder_select="mpegaudio"
2018 mp3adu_decoder_select="mpegaudio"
2019 mp3adufloat_decoder_select="mpegaudio"
2020 mp3float_decoder_select="mpegaudio"
2021 mp3on4_decoder_select="mpegaudio"
2022 mp3on4float_decoder_select="mpegaudio"
2023 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2024 mpc8_decoder_select="mpegaudiodsp"
2025 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2026 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2027 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2028 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2029 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2030 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2031 mpeg2_qsv_decoder_deps="libmfx"
2032 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2033 mpeg2_qsv_encoder_deps="libmfx"
2034 mpeg2_qsv_encoder_select="qsvenc"
2035 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2036 mpeg4_encoder_select="h263_encoder"
2037 msa1_decoder_select="mss34dsp"
2038 msmpeg4v1_decoder_select="h263_decoder"
2039 msmpeg4v2_decoder_select="h263_decoder"
2040 msmpeg4v2_encoder_select="h263_encoder"
2041 msmpeg4v3_decoder_select="h263_decoder"
2042 msmpeg4v3_encoder_select="h263_encoder"
2043 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2044 mts2_decoder_select="mss34dsp"
2045 mxpeg_decoder_select="mjpeg_decoder"
2046 nellymoser_decoder_select="mdct sinewin"
2047 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2048 nuv_decoder_select="idctdsp lzo"
2049 nvenc_h264_encoder_deps="nvenc"
2050 nvenc_hevc_encoder_deps="nvenc"
2051 on2avc_decoder_select="mdct"
2052 opus_decoder_deps="avresample"
2053 opus_decoder_select="imdct15"
2054 png_decoder_deps="zlib"
2055 png_encoder_deps="zlib"
2056 png_encoder_select="huffyuvencdsp"
2057 prores_decoder_select="idctdsp"
2058 prores_encoder_select="fdctdsp"
2059 qcelp_decoder_select="lsp"
2060 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2061 ra_144_encoder_select="audio_frame_queue lpc"
2062 ralf_decoder_select="golomb"
2063 rscc_decoder_deps="zlib"
2064 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2065 rv10_encoder_select="h263_encoder"
2066 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2067 rv20_encoder_select="h263_encoder"
2068 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2069 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2070 screenpresso_decoder_deps="zlib"
2071 shorten_decoder_select="golomb"
2072 sipr_decoder_select="lsp"
2073 sp5x_decoder_select="mjpeg_decoder"
2074 svq1_decoder_select="hpeldsp"
2075 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2076 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2077 svq3_decoder_suggest="zlib"
2078 tak_decoder_select="audiodsp"
2079 tdsc_decoder_deps="zlib"
2080 tdsc_decoder_select="mjpeg_decoder"
2081 theora_decoder_select="vp3_decoder"
2082 thp_decoder_select="mjpeg_decoder"
2083 tiff_decoder_suggest="zlib"
2084 tiff_encoder_suggest="zlib"
2085 truehd_decoder_select="mlp_decoder"
2086 truemotion2_decoder_select="bswapdsp"
2087 truespeech_decoder_select="bswapdsp"
2088 tscc_decoder_deps="zlib"
2089 txd_decoder_select="texturedsp"
2090 twinvq_decoder_select="mdct lsp sinewin"
2091 utvideo_decoder_select="bswapdsp"
2092 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2093 vble_decoder_select="huffyuvdsp"
2094 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2095 vc1image_decoder_select="vc1_decoder"
2096 vorbis_decoder_select="mdct"
2097 vorbis_encoder_select="mdct"
2098 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2099 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2100 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2101 vp6a_decoder_select="vp6_decoder"
2102 vp6f_decoder_select="vp6_decoder"
2103 vp7_decoder_select="h264pred videodsp vp8dsp"
2104 vp8_decoder_select="h264pred videodsp vp8dsp"
2105 vp9_decoder_select="videodsp"
2106 webp_decoder_select="vp8_decoder"
2107 wmapro_decoder_select="mdct sinewin wma_freqs"
2108 wmav1_decoder_select="mdct sinewin wma_freqs"
2109 wmav1_encoder_select="mdct sinewin wma_freqs"
2110 wmav2_decoder_select="mdct sinewin wma_freqs"
2111 wmav2_encoder_select="mdct sinewin wma_freqs"
2112 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2113 wmv1_decoder_select="h263_decoder"
2114 wmv1_encoder_select="h263_encoder"
2115 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2116 wmv2_encoder_select="h263_encoder wmv2dsp"
2117 wmv3_decoder_select="vc1_decoder"
2118 wmv3image_decoder_select="wmv3_decoder"
2119 zerocodec_decoder_deps="zlib"
2120 zlib_decoder_deps="zlib"
2121 zlib_encoder_deps="zlib"
2122 zmbv_decoder_deps="zlib"
2123 zmbv_encoder_deps="zlib"
2124
2125 # hardware accelerators
2126 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2127 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2128 vaapi_deps="va_va_h"
2129 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2130 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2131 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2132
2133 h263_vaapi_hwaccel_deps="vaapi"
2134 h263_vaapi_hwaccel_select="h263_decoder"
2135 h264_d3d11va_hwaccel_deps="d3d11va"
2136 h264_d3d11va_hwaccel_select="h264_decoder"
2137 h264_dxva2_hwaccel_deps="dxva2"
2138 h264_dxva2_hwaccel_select="h264_decoder"
2139 h264_mmal_decoder_deps="mmal"
2140 h264_mmal_hwaccel_deps="mmal"
2141 h264_mmal_decoder_select="h264_decoder"
2142 h264_mmal_encoder_deps="mmal"
2143 h264_qsv_hwaccel_deps="libmfx"
2144 h264_vaapi_hwaccel_deps="vaapi"
2145 h264_vaapi_hwaccel_select="h264_decoder"
2146 h264_vda_hwaccel_deps="vda"
2147 h264_vda_hwaccel_select="h264_decoder"
2148 h264_vda_old_hwaccel_deps="vda"
2149 h264_vda_old_hwaccel_select="h264_decoder"
2150 h264_vdpau_hwaccel_deps="vdpau"
2151 h264_vdpau_hwaccel_select="h264_decoder"
2152 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2153 hevc_d3d11va_hwaccel_select="hevc_decoder"
2154 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2155 hevc_dxva2_hwaccel_select="hevc_decoder"
2156 hevc_qsv_hwaccel_deps="libmfx"
2157 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2158 hevc_vdpau_hwaccep_select="hevc_decoder"
2159 mpeg1_vdpau_hwaccel_deps="vdpau"
2160 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2161 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2162 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2163 mpeg2_dxva2_hwaccel_deps="dxva2"
2164 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2165 mpeg2_qsv_hwaccel_deps="libmfx"
2166 mpeg2_vaapi_hwaccel_deps="vaapi"
2167 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2168 mpeg2_vdpau_hwaccel_deps="vdpau"
2169 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2170 mpeg4_vaapi_hwaccel_deps="vaapi"
2171 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2172 mpeg4_vdpau_hwaccel_deps="vdpau"
2173 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2174 vc1_d3d11va_hwaccel_deps="d3d11va"
2175 vc1_d3d11va_hwaccel_select="vc1_decoder"
2176 vc1_dxva2_hwaccel_deps="dxva2"
2177 vc1_dxva2_hwaccel_select="vc1_decoder"
2178 vc1_vaapi_hwaccel_deps="vaapi"
2179 vc1_vaapi_hwaccel_select="vc1_decoder"
2180 vc1_vdpau_hwaccel_deps="vdpau"
2181 vc1_vdpau_hwaccel_select="vc1_decoder"
2182 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2183 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2184 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2185 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2186
2187 # parsers
2188 h264_parser_select="h264_decoder"
2189 hevc_parser_select="golomb"
2190 mpegvideo_parser_select="mpegvideo"
2191 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2192 vc1_parser_select="mpegvideo startcode vc1_decoder"
2193
2194 # bitstream_filters
2195 mjpeg2jpeg_bsf_select="jpegtables"
2196
2197 # external libraries
2198 libdcadec_decoder_deps="libdcadec"
2199 libfaac_encoder_deps="libfaac"
2200 libfaac_encoder_select="audio_frame_queue"
2201 libfdk_aac_decoder_deps="libfdk_aac"
2202 libfdk_aac_encoder_deps="libfdk_aac"
2203 libfdk_aac_encoder_select="audio_frame_queue"
2204 libgsm_decoder_deps="libgsm"
2205 libgsm_encoder_deps="libgsm"
2206 libgsm_ms_decoder_deps="libgsm"
2207 libgsm_ms_encoder_deps="libgsm"
2208 libilbc_decoder_deps="libilbc"
2209 libilbc_encoder_deps="libilbc"
2210 libkvazaar_encoder_deps="libkvazaar"
2211 libmp3lame_encoder_deps="libmp3lame"
2212 libmp3lame_encoder_select="audio_frame_queue"
2213 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2214 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2215 libopencore_amrnb_encoder_select="audio_frame_queue"
2216 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2217 libopenh264_encoder_deps="libopenh264"
2218 libopenjpeg_decoder_deps="libopenjpeg"
2219 libopenjpeg_encoder_deps="libopenjpeg"
2220 libopus_decoder_deps="libopus"
2221 libopus_encoder_deps="libopus"
2222 libopus_encoder_select="audio_frame_queue"
2223 libschroedinger_decoder_deps="libschroedinger"
2224 libschroedinger_encoder_deps="libschroedinger"
2225 libspeex_decoder_deps="libspeex"
2226 libspeex_encoder_deps="libspeex"
2227 libspeex_encoder_select="audio_frame_queue"
2228 libtheora_encoder_deps="libtheora"
2229 libtwolame_encoder_deps="libtwolame"
2230 libvo_aacenc_encoder_deps="libvo_aacenc"
2231 libvo_aacenc_encoder_select="audio_frame_queue"
2232 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2233 libvorbis_encoder_deps="libvorbis"
2234 libvorbis_encoder_select="audio_frame_queue"
2235 libvpx_vp8_decoder_deps="libvpx"
2236 libvpx_vp8_encoder_deps="libvpx"
2237 libvpx_vp9_decoder_deps="libvpx"
2238 libvpx_vp9_encoder_deps="libvpx"
2239 libwavpack_encoder_deps="libwavpack"
2240 libwebp_encoder_deps="libwebp"
2241 libx262_encoder_deps="libx262"
2242 libx264_encoder_deps="libx264"
2243 libx265_encoder_deps="libx265"
2244 libxavs_encoder_deps="libxavs"
2245 libxvid_encoder_deps="libxvid"
2246
2247 # demuxers / muxers
2248 ac3_demuxer_select="ac3_parser"
2249 asf_demuxer_select="riffdec"
2250 asf_muxer_select="riffenc"
2251 asf_stream_muxer_select="asf_muxer"
2252 avi_demuxer_select="riffdec"
2253 avi_muxer_select="riffenc"
2254 avisynth_demuxer_deps="avisynth"
2255 avisynth_demuxer_select="riffdec"
2256 caf_demuxer_select="riffdec"
2257 dash_muxer_select="mp4_muxer"
2258 dirac_demuxer_select="dirac_parser"
2259 dv_demuxer_select="dvprofile"
2260 dv_muxer_select="dvprofile"
2261 dxa_demuxer_select="riffdec"
2262 eac3_demuxer_select="ac3_parser"
2263 f4v_muxer_select="mov_muxer"
2264 flac_demuxer_select="flac_parser"
2265 hds_muxer_select="flv_muxer"
2266 hls_muxer_select="mpegts_muxer"
2267 ipod_muxer_select="mov_muxer"
2268 ismv_muxer_select="mov_muxer"
2269 matroska_audio_muxer_select="matroska_muxer"
2270 matroska_demuxer_select="riffdec"
2271 matroska_demuxer_suggest="bzlib lzo zlib"
2272 matroska_muxer_select="riffenc"
2273 mmf_muxer_select="riffenc"
2274 mov_demuxer_select="riffdec"
2275 mov_demuxer_suggest="zlib"
2276 mov_muxer_select="riffenc rtpenc_chain"
2277 mp3_demuxer_select="mpegaudio_parser"
2278 mp4_muxer_select="mov_muxer"
2279 mpegts_muxer_select="adts_muxer latm_muxer"
2280 mpegtsraw_demuxer_select="mpegts_demuxer"
2281 mxf_d10_muxer_select="mxf_muxer"
2282 nut_muxer_select="riffenc"
2283 nuv_demuxer_select="riffdec"
2284 oga_muxer_select="ogg_muxer"
2285 ogg_demuxer_select="dirac_parse"
2286 opus_muxer_select="ogg_muxer"
2287 psp_muxer_select="mov_muxer"
2288 rtp_demuxer_select="sdp_demuxer"
2289 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2290 rtsp_demuxer_select="http_protocol rtpdec"
2291 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2292 sap_demuxer_select="sdp_demuxer"
2293 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2294 sdp_demuxer_select="rtpdec"
2295 smoothstreaming_muxer_select="ismv_muxer"
2296 spdif_muxer_select="aac_parser"
2297 spx_muxer_select="ogg_muxer"
2298 swf_demuxer_suggest="zlib"
2299 tak_demuxer_select="tak_parser"
2300 tg2_muxer_select="mov_muxer"
2301 tgp_muxer_select="mov_muxer"
2302 w64_demuxer_select="wav_demuxer"
2303 wav_demuxer_select="riffdec"
2304 wav_muxer_select="riffenc"
2305 webm_muxer_select="riffenc"
2306 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2307 wtv_demuxer_select="riffdec"
2308 xmv_demuxer_select="riffdec"
2309 xwma_demuxer_select="riffdec"
2310
2311 # indevs / outdevs
2312 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2313 alsa_outdev_deps="alsa_asoundlib_h"
2314 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2315 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2316 dv1394_indev_deps="dv1394"
2317 dv1394_indev_select="dv_demuxer"
2318 fbdev_indev_deps="linux_fb_h"
2319 jack_indev_deps="jack_jack_h pthreads"
2320 libcdio_indev_deps="libcdio"
2321 libdc1394_indev_deps="libdc1394"
2322 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2323 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2324 pulse_indev_deps="libpulse"
2325 sndio_indev_deps="sndio_h"
2326 sndio_outdev_deps="sndio_h"
2327 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2328 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2329 vfwcap_indev_extralibs="-lavicap32"
2330 x11grab_indev_deps="x11grab"
2331 x11grab_xcb_indev_deps="libxcb"
2332
2333 # protocols
2334 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2335 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2336 ffrtmpcrypt_protocol_select="tcp_protocol"
2337 ffrtmphttp_protocol_deps="!librtmp_protocol"
2338 ffrtmphttp_protocol_select="http_protocol"
2339 gopher_protocol_select="network"
2340 http_protocol_select="tcp_protocol"
2341 httpproxy_protocol_select="tcp_protocol"
2342 https_protocol_select="tls_protocol"
2343 icecast_protocol_select="http_protocol"
2344 librtmp_protocol_deps="librtmp"
2345 librtmpe_protocol_deps="librtmp"
2346 librtmps_protocol_deps="librtmp"
2347 librtmpt_protocol_deps="librtmp"
2348 librtmpte_protocol_deps="librtmp"
2349 mmsh_protocol_select="http_protocol"
2350 mmst_protocol_select="network"
2351 rtmp_protocol_deps="!librtmp_protocol"
2352 rtmp_protocol_select="tcp_protocol"
2353 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2354 rtmps_protocol_deps="!librtmp_protocol"
2355 rtmps_protocol_select="tls_protocol"
2356 rtmpt_protocol_select="ffrtmphttp_protocol"
2357 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2358 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2359 rtp_protocol_select="udp_protocol"
2360 sctp_protocol_deps="struct_sctp_event_subscribe"
2361 sctp_protocol_select="network"
2362 srtp_protocol_select="rtp_protocol"
2363 tcp_protocol_select="network"
2364 tls_gnutls_protocol_deps="gnutls"
2365 tls_gnutls_protocol_select="tcp_protocol"
2366 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2367 tls_openssl_protocol_select="tcp_protocol"
2368 tls_protocol_select_any="tls_gnutls_protocol tls_openssl_protocol"
2369 udp_protocol_select="network"
2370 unix_protocol_deps="sys_un_h"
2371 unix_protocol_select="network"
2372
2373 # filters
2374 blackframe_filter_deps="gpl"
2375 boxblur_filter_deps="gpl"
2376 bs2b_filter_deps="libbs2b"
2377 cropdetect_filter_deps="gpl"
2378 delogo_filter_deps="gpl"
2379 drawtext_filter_deps="libfreetype"
2380 frei0r_filter_deps="frei0r dlopen"
2381 frei0r_filter_extralibs='$ldl'
2382 frei0r_src_filter_deps="frei0r dlopen"
2383 frei0r_src_filter_extralibs='$ldl'
2384 hqdn3d_filter_deps="gpl"
2385 interlace_filter_deps="gpl"
2386 ocv_filter_deps="libopencv"
2387 resample_filter_deps="avresample"
2388 scale_filter_deps="swscale"
2389
2390 # examples
2391 avcodec_example_deps="avcodec avutil"
2392 filter_audio_example_deps="avfilter avutil"
2393 metadata_example_deps="avformat avutil"
2394 output_example_deps="avcodec avformat avutil swscale"
2395 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2396 transcode_aac_example_deps="avcodec avformat avresample"
2397
2398 # libraries, in linking order
2399 avcodec_deps="avutil"
2400 avdevice_deps="avformat avcodec avutil"
2401 avfilter_deps="avutil"
2402 avformat_deps="avcodec avutil"
2403 avresample_deps="avutil"
2404 swscale_deps="avutil"
2405
2406 # programs
2407 avconv_deps="avcodec avfilter avformat avresample swscale"
2408 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2409                fps_filter null_filter resample_filter scale_filter
2410                setpts_filter trim_filter"
2411 avplay_deps="avcodec avfilter avformat avresample sdl"
2412 avplay_libs='$sdl_libs'
2413 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2414 avprobe_deps="avcodec avformat"
2415
2416 # documentation
2417 pod2man_deps="doc"
2418 texi2html_deps="doc"
2419
2420 # default parameters
2421
2422 logfile="config.log"
2423
2424 # installation paths
2425 prefix_default="/usr/local"
2426 bindir_default='${prefix}/bin'
2427 datadir_default='${prefix}/share/avconv'
2428 docdir_default='${prefix}/share/doc/libav'
2429 incdir_default='${prefix}/include'
2430 libdir_default='${prefix}/lib'
2431 mandir_default='${prefix}/share/man'
2432 shlibdir_default="$libdir_default"
2433
2434 # toolchain
2435 ar_default="ar"
2436 cc_default="gcc"
2437 host_cc_default="gcc"
2438 cp_f="cp -f"
2439 ln_s="ln -s -f"
2440 nm_default="nm -g"
2441 objformat="elf"
2442 pkg_config_default=pkg-config
2443 ranlib="ranlib"
2444 strip="strip"
2445 yasmexe="yasm"
2446
2447 # machine
2448 arch_default=$(uname -m)
2449 cpu="generic"
2450 intrinsics="none"
2451
2452 # OS
2453 target_os_default=$(tolower $(uname -s))
2454 host_os=$target_os_default
2455
2456 # configurable options
2457 enable asm
2458 enable debug
2459 enable doc
2460 enable faan faandct faanidct
2461 enable optimizations
2462 enable safe_bitstream_reader
2463 enable static
2464 enable swscale_alpha
2465 enable valgrind_backtrace
2466
2467 # By default, enable only those hwaccels that have no external dependencies.
2468 enable d3d11va dxva2 vda vdpau
2469
2470 # build settings
2471 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2472 LIBPREF="lib"
2473 LIBSUF=".a"
2474 FULLNAME='$(NAME)$(BUILDSUF)'
2475 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2476 SLIBPREF="lib"
2477 SLIBSUF=".so"
2478 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2479 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2480 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2481 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2482 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2483 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2484
2485 asflags_filter=echo
2486 cflags_filter=echo
2487 ldflags_filter=echo
2488
2489 AS_C='-c'
2490 AS_O='-o $@'
2491 CC_C='-c'
2492 CC_E='-E -o $@'
2493 CC_O='-o $@'
2494 OBJCC_C='-c'
2495 OBJCC_E='-E -o $@'
2496 OBJCC_O='-o $@'
2497 LD_O='-o $@'
2498 LD_LIB='-l%'
2499 LD_PATH='-L'
2500 HOSTCC_C='-c'
2501 HOSTCC_E='-E -o $@'
2502 HOSTCC_O='-o $@'
2503 HOSTLD_O='-o $@'
2504
2505 host_libs='-lm'
2506 host_cflags_filter=echo
2507 host_ldflags_filter=echo
2508
2509 target_path='$(CURDIR)'
2510
2511 # since the object filename is not given with the -MM flag, the compiler
2512 # is only able to print the basename, and we must add the path ourselves
2513 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2514 DEPFLAGS='-MM'
2515
2516 # find source path
2517 if test -f configure; then
2518     source_path=.
2519 else
2520     source_path=$(cd $(dirname "$0"); pwd)
2521     echo "$source_path" | grep -q '[[:blank:]]' &&
2522         die "Out of tree builds are impossible with whitespace in source path."
2523     test -e "$source_path/config.h" &&
2524         die "Out of tree builds are impossible with config.h in source dir."
2525 fi
2526
2527 for v in "$@"; do
2528     r=${v#*=}
2529     l=${v%"$r"}
2530     r=$(sh_quote "$r")
2531     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2532 done
2533
2534 find_things(){
2535     thing=$1
2536     pattern=$2
2537     file=$source_path/$3
2538     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2539 }
2540
2541 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2542 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2543 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2544 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2545 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2546 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2547 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2548 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2549 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2550 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2551 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2552
2553 ALL_COMPONENTS="
2554     $BSF_LIST
2555     $DECODER_LIST
2556     $DEMUXER_LIST
2557     $ENCODER_LIST
2558     $FILTER_LIST
2559     $HWACCEL_LIST
2560     $INDEV_LIST
2561     $MUXER_LIST
2562     $OUTDEV_LIST
2563     $PARSER_LIST
2564     $PROTOCOL_LIST
2565 "
2566
2567 enable $ARCH_EXT_LIST
2568
2569 die_unknown(){
2570     echo "Unknown option \"$1\"."
2571     echo "See $0 --help for available options."
2572     exit 1
2573 }
2574
2575 print_3_columns() {
2576     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2577 }
2578
2579 show_list() {
2580     suffix=_$1
2581     shift
2582     echo $* | sed s/$suffix//g | print_3_columns
2583     exit 0
2584 }
2585
2586 rand_list(){
2587     IFS=', '
2588     set -- $*
2589     unset IFS
2590     for thing; do
2591         comp=${thing%:*}
2592         prob=${thing#$comp}
2593         prob=${prob#:}
2594         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2595         echo "prob ${prob:-0.5}"
2596         printf '%s\n' $comp
2597     done
2598 }
2599
2600 do_random(){
2601     action=$1
2602     shift
2603     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2604     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2605 }
2606
2607 for opt do
2608     optval="${opt#*=}"
2609     case "$opt" in
2610         --extra-ldflags=*)
2611             add_ldflags $optval
2612         ;;
2613         --extra-ldexeflags=*)
2614             add_ldexeflags $optval
2615         ;;
2616         --extra-libs=*)
2617             add_extralibs $optval
2618         ;;
2619         --disable-devices)
2620             disable $INDEV_LIST $OUTDEV_LIST
2621         ;;
2622         --enable-debug=*)
2623             debuglevel="$optval"
2624         ;;
2625         --disable-programs)
2626             disable $PROGRAM_LIST
2627         ;;
2628         --disable-everything)
2629             map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2630             enable_deep_force $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2631         ;;
2632         --disable-all)
2633             map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2634             disable $LIBRARY_LIST $PROGRAM_LIST doc
2635         ;;
2636         --enable-random|--disable-random)
2637             action=${opt%%-random}
2638             do_random ${action#--} $COMPONENT_LIST
2639         ;;
2640         --enable-random=*|--disable-random=*)
2641             action=${opt%%-random=*}
2642             do_random ${action#--} $optval
2643         ;;
2644         --enable-*=*|--disable-*=*)
2645             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2646             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2647             eval list=\$$(toupper $thing)_LIST
2648             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2649             test $action = enable && action="request"
2650             $action $(filter "$name" $list)
2651         ;;
2652         --enable-avserver|--disable-avserver*)
2653             warn "avserver has been removed, the ${opt} option is only"\
2654                  "provided for compatibility and will be removed in the future"
2655         ;;
2656         --enable-?*|--disable-?*)
2657             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2658             test $action = enable && action="request"
2659             if is_in $option $COMPONENT_LIST; then
2660                 eval $action \$$(toupper ${option%s})_LIST
2661             elif is_in $option $CMDLINE_SELECT; then
2662                 $action $option
2663             else
2664                 die_unknown $opt
2665             fi
2666         ;;
2667         --list-*)
2668             NAME="${opt#--list-}"
2669             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2670             NAME=${NAME%s}
2671             eval show_list $NAME \$$(toupper $NAME)_LIST
2672         ;;
2673         --help|-h) show_help
2674         ;;
2675         *)
2676             optname="${opt%%=*}"
2677             optname="${optname#--}"
2678             optname=$(echo "$optname" | sed 's/-/_/g')
2679             if is_in $optname $CMDLINE_SET; then
2680                 eval $optname='$optval'
2681             elif is_in $optname $CMDLINE_APPEND; then
2682                 append $optname "$optval"
2683             else
2684                 die_unknown $opt
2685             fi
2686         ;;
2687     esac
2688 done
2689
2690 for e in $env; do
2691     eval "export $e"
2692 done
2693
2694 disabled logging && logfile=/dev/null
2695
2696 # Enable the default components if not disabled explicitly
2697
2698 enable_weak $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2699
2700 # Disable all the library-specific components if the library itself
2701 # is disabled, see AVCODEC_LIST and following _LIST variables.
2702
2703 disable_components(){
2704     disabled ${1} && disable_weak $(
2705         eval components="\$$(toupper ${1})_COMPONENTS"
2706         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2707     )
2708 }
2709
2710 map 'disable_components $v' $LIBRARY_LIST
2711
2712 # Mark components that had not been enabled/disabled explicitly
2713 # as enabled
2714
2715 for n in $COMPONENT_LIST; do
2716     v=$(toupper ${n%s})_LIST
2717     eval enable_weak \$$v
2718     eval ${n}_if_any="\$$v"
2719 done
2720
2721 # Make so that disabled libraries are enabled if a component
2722 # of them is requested
2723
2724 for n in $LIBRARY_LIST; do
2725     v=$(toupper ${n})_COMPONENTS
2726     eval ${n}_if_any="\$$v"
2727 done
2728
2729 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2730 set >> $logfile
2731
2732 case "$toolchain" in
2733     *-asan)
2734         cc_default="${toolchain%-asan}"
2735         add_cflags  -fsanitize=address
2736         add_ldflags -fsanitize=address
2737     ;;
2738     *-tsan)
2739         cc_default="${toolchain%-tsan}"
2740         add_cflags  -fsanitize=thread -pie
2741         add_ldflags -fsanitize=thread -pie
2742         case "$toolchain" in
2743             gcc-tsan)
2744                 add_cflags  -fPIC
2745                 add_ldflags -fPIC
2746                 ;;
2747         esac
2748     ;;
2749     *-usan)
2750         cc_default="${toolchain%-usan}"
2751         add_cflags  -fsanitize=undefined
2752         add_ldflags -fsanitize=undefined
2753         case "$toolchain" in
2754             clang-usan)
2755                 add_cflags -O1
2756                 ;;
2757         esac
2758     ;;
2759     valgrind-*)
2760         target_exec_default="valgrind"
2761         case "$toolchain" in
2762             valgrind-massif)
2763                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2764                 ;;
2765             valgrind-memcheck)
2766                 target_exec_args="--track-origins=yes --leak-check=full"
2767                 ;;
2768         esac
2769     ;;
2770     msvc)
2771         # Check whether the current MSVC version needs the C99 converter.
2772         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2773         # support enough of C99 to build libav. Default to the new
2774         # behaviour if the regexp was unable to match anything, since this
2775         # successfully parses the version number of existing supported
2776         # versions that require the converter (MSVC 2010 and 2012).
2777         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2778         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2779             cc_default="cl"
2780         else
2781             cc_default="c99wrap cl"
2782         fi
2783         ld_default="$source_path/compat/windows/mslink"
2784         nm_default="dumpbin -symbols"
2785         ar_default="lib"
2786         case "$arch" in
2787         arm*)
2788             as_default="armasm"
2789             ;;
2790         esac
2791         target_os_default="win32"
2792         # Use a relative path for TMPDIR. This makes sure all the
2793         # ffconf temp files are written with a relative path, avoiding
2794         # issues with msys/win32 path conversion for MSVC parameters
2795         # such as -Fo<file> or -out:<file>.
2796         TMPDIR=.
2797     ;;
2798     icl)
2799         cc_default="icl"
2800         ld_default="xilink"
2801         nm_default="dumpbin -symbols"
2802         ar_default="xilib"
2803         target_os_default="win32"
2804         TMPDIR=.
2805     ;;
2806     gcov)
2807         add_cflags  -fprofile-arcs -ftest-coverage
2808         add_ldflags -fprofile-arcs -ftest-coverage
2809     ;;
2810     hardened)
2811         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2812         add_cflags   -fno-strict-overflow -fstack-protector-all
2813         add_ldflags  -Wl,-z,relro -Wl,-z,now
2814     ;;
2815     ?*)
2816         die "Unknown toolchain $toolchain"
2817     ;;
2818 esac
2819
2820 test -n "$cross_prefix" && enable cross_compile
2821
2822 if enabled cross_compile; then
2823     test -n "$arch" && test -n "$target_os" ||
2824         die "Must specify target arch and OS when cross-compiling"
2825 fi
2826
2827 ar_default="${cross_prefix}${ar_default}"
2828 cc_default="${cross_prefix}${cc_default}"
2829 occ_default="${cross_prefix}${occ_default}"
2830 nm_default="${cross_prefix}${nm_default}"
2831 pkg_config_default="${cross_prefix}${pkg_config_default}"
2832 ranlib="${cross_prefix}${ranlib}"
2833 strip="${cross_prefix}${strip}"
2834
2835 sysinclude_default="${sysroot}/usr/include"
2836
2837 set_default arch cc pkg_config sysinclude target_exec target_os
2838 enabled cross_compile || host_cc_default=$cc
2839 set_default host_cc
2840
2841 if ! $pkg_config --version >/dev/null 2>&1; then
2842     warn "$pkg_config not found, library detection may fail."
2843     pkg_config=false
2844 fi
2845
2846 exesuf() {
2847     case $1 in
2848         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2849     esac
2850 }
2851
2852 EXESUF=$(exesuf $target_os)
2853 HOSTEXESUF=$(exesuf $host_os)
2854
2855 # set temporary file name
2856 : ${TMPDIR:=$TEMPDIR}
2857 : ${TMPDIR:=$TMP}
2858 : ${TMPDIR:=/tmp}
2859
2860 if ! check_cmd mktemp -u XXXXXX; then
2861     # simple replacement for missing mktemp
2862     # NOT SAFE FOR GENERAL USE
2863     mktemp(){
2864         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2865     }
2866 fi
2867
2868 tmpfile(){
2869     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2870         (set -C; exec > $tmp) 2>/dev/null ||
2871         die "Unable to create temporary file in $TMPDIR."
2872     append TMPFILES $tmp
2873     eval $1=$tmp
2874 }
2875
2876 trap 'rm -f -- $TMPFILES' EXIT
2877
2878 tmpfile TMPASM .asm
2879 tmpfile TMPC   .c
2880 tmpfile TMPE   $EXESUF
2881 tmpfile TMPH   .h
2882 tmpfile TMPO   .o
2883 tmpfile TMPS   .S
2884 tmpfile TMPSH  .sh
2885 tmpfile TMPV   .ver
2886
2887 unset -f mktemp
2888
2889 chmod +x $TMPE
2890
2891 # make sure we can execute files in $TMPDIR
2892 cat > $TMPSH 2>> $logfile <<EOF
2893 #! /bin/sh
2894 EOF
2895 chmod +x $TMPSH >> $logfile 2>&1
2896 if ! $TMPSH >> $logfile 2>&1; then
2897     cat <<EOF
2898 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2899 variable to another directory and make sure that it is not mounted noexec.
2900 EOF
2901     die "Sanity test failed."
2902 fi
2903
2904 armasm_flags(){
2905     for flag; do
2906         case $flag in
2907             # Filter out MSVC cl.exe options from cflags that shouldn't
2908             # be passed to gas-preprocessor
2909             -M[TD]*)                                            ;;
2910             *)                  echo $flag                      ;;
2911         esac
2912    done
2913 }
2914
2915 ccc_flags(){
2916     for flag; do
2917         case $flag in
2918             -std=c99)           echo -c99                       ;;
2919             -mcpu=*)            echo -arch ${flag#*=}           ;;
2920             -mieee)             echo -ieee                      ;;
2921             -O*|-fast)          echo $flag                      ;;
2922             -fno-math-errno)    echo -assume nomath_errno       ;;
2923             -g)                 echo -g3                        ;;
2924             -Wall)              echo -msg_enable level2         ;;
2925             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2926             -Wl,*)              echo $flag                      ;;
2927             -f*|-W*)                                            ;;
2928             *)                  echo $flag                      ;;
2929         esac
2930    done
2931 }
2932
2933 cparser_flags(){
2934     for flag; do
2935         case $flag in
2936             -Wno-switch)             echo -Wno-switch-enum ;;
2937             -Wno-format-zero-length) ;;
2938             -Wdisabled-optimization) ;;
2939             -Wno-pointer-sign)       echo -Wno-other ;;
2940             *)                       echo $flag ;;
2941         esac
2942     done
2943 }
2944
2945 msvc_common_flags(){
2946     for flag; do
2947         case $flag in
2948             # In addition to specifying certain flags under the compiler
2949             # specific filters, they must be specified here as well or else the
2950             # generic catch all at the bottom will print the original flag.
2951             -Wall)                ;;
2952             -std=c99)             ;;
2953             # Common flags
2954             -fomit-frame-pointer) ;;
2955             -g)                   echo -Z7 ;;
2956             -fno-math-errno)      ;;
2957             -fno-common)          ;;
2958             -fno-signed-zeros)    ;;
2959             -fPIC)                ;;
2960             -mthumb)              ;;
2961             -march=*)             ;;
2962             -lz)                  echo zlib.lib ;;
2963             -lavifil32)           echo vfw32.lib ;;
2964             -lavicap32)           echo vfw32.lib user32.lib ;;
2965             -lx264)               echo libx264.lib ;;
2966             -l*)                  echo ${flag#-l}.lib ;;
2967             -L*)                  echo -libpath:${flag#-L} ;;
2968             *)                    echo $flag ;;
2969         esac
2970     done
2971 }
2972
2973 msvc_flags(){
2974     msvc_common_flags "$@"
2975     for flag; do
2976         case $flag in
2977             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2978                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2979                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2980                                        -wd4273 -wd4554 -wd4701 ;;
2981         esac
2982     done
2983 }
2984
2985 icl_flags(){
2986     msvc_common_flags "$@"
2987     for flag; do
2988         case $flag in
2989             # Despite what Intel's documentation says -Wall, which is supported
2990             # on Windows, does enable remarks so disable them here.
2991             -Wall)                echo $flag -Qdiag-disable:remark ;;
2992             -std=c99)             echo -Qstd=c99 ;;
2993         esac
2994     done
2995 }
2996
2997 pgi_flags(){
2998     for flag; do
2999         case $flag in
3000             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3001             -fomit-frame-pointer) echo -Mnoframe ;;
3002             -g)                   echo -gopt ;;
3003             *)                    echo $flag ;;
3004         esac
3005     done
3006 }
3007
3008 suncc_flags(){
3009     for flag; do
3010         case $flag in
3011             -march=*|-mcpu=*)
3012                 case "${flag#*=}" in
3013                     native)                   echo -xtarget=native       ;;
3014                     v9|niagara)               echo -xarch=sparc          ;;
3015                     ultrasparc)               echo -xarch=sparcvis       ;;
3016                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3017                     i586|pentium)             echo -xchip=pentium        ;;
3018                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3019                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3020                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3021                     pentium4*)          echo -xtarget=pentium4           ;;
3022                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3023                     *-sse3)             echo -xarch=sse3                 ;;
3024                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3025                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3026                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3027                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3028                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3029                     k8|opteron|athlon64|athlon-fx)
3030                                                echo -xarch=sse2a         ;;
3031                     athlon*)                   echo -xarch=pentium_proa  ;;
3032                 esac
3033                 ;;
3034             -std=c99)             echo -xc99              ;;
3035             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3036             -fPIC)                echo -KPIC -xcode=pic32 ;;
3037             -W*,*)                echo $flag              ;;
3038             -f*-*|-W*|-mimpure-text)                      ;;
3039             -shared)              echo -G                 ;;
3040             *)                    echo $flag              ;;
3041         esac
3042     done
3043 }
3044
3045 tms470_flags(){
3046     for flag; do
3047         case $flag in
3048             -march=*|-mcpu=*)
3049                 case "${flag#*=}" in
3050                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3051                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3052                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3053                     armv6*|arm11*)          echo -mv=6   ;;
3054                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3055                                             echo -mv=5e  ;;
3056                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3057                 esac
3058                 ;;
3059             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3060             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3061             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3062             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3063             -msoft-float)   echo --float_support=vfplib       ;;
3064             -O[0-3]|-mf=*)  echo $flag                        ;;
3065             -g)             echo -g -mn                       ;;
3066             -pds=*)         echo $flag                        ;;
3067             -D*|-I*)        echo $flag                        ;;
3068             --gcc|--abi=*)  echo $flag                        ;;
3069             -me)            echo $flag                        ;;
3070         esac
3071     done
3072 }
3073
3074 probe_cc(){
3075     pfx=$1
3076     _cc=$2
3077
3078     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3079     unset _ld_o _ldflags _ld_lib _ld_path
3080     unset _depflags _DEPCMD _DEPFLAGS
3081     _flags_filter=echo
3082
3083     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3084         _type=llvm_gcc
3085         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3086         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3087         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3088         _cflags_speed='-O3'
3089         _cflags_size='-Os'
3090     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3091         _type=gcc
3092         gcc_version=$($_cc --version | head -n1)
3093         gcc_basever=$($_cc -dumpversion)
3094         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3095         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3096         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3097         if ! $_cc -dumpversion | grep -q '^2\.'; then
3098             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3099         fi
3100         _cflags_speed='-O3'
3101         _cflags_size='-Os'
3102     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3103         _type=icc
3104         _ident=$($_cc --version | head -n1)
3105         _depflags='-MMD'
3106         _cflags_speed='-O3'
3107         _cflags_size='-Os'
3108         _cflags_noopt='-O1'
3109     elif $_cc -v 2>&1 | grep -q xlc; then
3110         _type=xlc
3111         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3112         _cflags_speed='-O5'
3113         _cflags_size='-O5 -qcompact'
3114     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3115         _type=ccc
3116         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3117         _DEPFLAGS='-M'
3118         _cflags_speed='-fast'
3119         _cflags_size='-O1'
3120         _flags_filter=ccc_flags
3121     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3122         test -d "$sysroot" || die "No valid sysroot specified."
3123         _type=armcc
3124         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3125         armcc_conf="$PWD/armcc.conf"
3126         $_cc --arm_linux_configure                 \
3127              --arm_linux_config_file="$armcc_conf" \
3128              --configure_sysroot="$sysroot"        \
3129              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3130              die "Error creating armcc configuration file."
3131         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3132         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3133         as_default="${cross_prefix}gcc"
3134         _depflags='-MMD'
3135         _cflags_speed='-O3'
3136         _cflags_size='-Os'
3137     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3138         _type=tms470
3139         _ident=$($_cc -version | head -n1 | tr -s ' ')
3140         _flags='--gcc --abi=eabi -me'
3141         _cc_e='-ppl -fe=$@'
3142         _cc_o='-fe=$@'
3143         _depflags='-ppa -ppd=$(@:.o=.d)'
3144         _cflags_speed='-O3 -mf=5'
3145         _cflags_size='-O3 -mf=2'
3146         _flags_filter=tms470_flags
3147     elif $_cc -v 2>&1 | grep -q clang; then
3148         _type=clang
3149         _ident=$($_cc --version 2>/dev/null | head -n1)
3150         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3151         _cflags_speed='-O3'
3152         _cflags_size='-Os'
3153     elif $_cc -V 2>&1 | grep -q Sun; then
3154         _type=suncc
3155         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3156         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3157         _DEPFLAGS='-xM1 -xc99'
3158         _ldflags='-std=c99'
3159         _cflags_speed='-O5'
3160         _cflags_size='-O5 -xspace'
3161         _flags_filter=suncc_flags
3162     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3163         _type=pathscale
3164         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3165         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3166         _cflags_speed='-O2'
3167         _cflags_size='-Os'
3168         _flags_filter='filter_out -Wdisabled-optimization'
3169     elif $_cc -v 2>&1 | grep -q Open64; then
3170         _type=open64
3171         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3172         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3173         _cflags_speed='-O2'
3174         _cflags_size='-Os'
3175         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3176     elif $_cc -V 2>&1 | grep -q Portland; then
3177         _type=pgi
3178         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3179         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3180         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3181         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3182         _cflags_noopt="-O1"
3183         _flags_filter=pgi_flags
3184     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3185         _type=armasm
3186         _ident=$($_cc | head -n1)
3187         # 4509: "This form of conditional instruction is deprecated"
3188         _flags="-nologo -ignore 4509"
3189         _flags_filter=armasm_flags
3190     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3191         _type=msvc
3192         _ident=$($_cc 2>&1 | head -n1)
3193         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3194         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3195         _cflags_speed="-O2"
3196         _cflags_size="-O1"
3197         if $_cc -nologo- 2>&1 | grep -q Linker; then
3198             _ld_o='-out:$@'
3199         else
3200             _ld_o='-Fe$@'
3201         fi
3202         _cc_o='-Fo$@'
3203         _cc_e='-P -Fi$@'
3204         _flags_filter=msvc_flags
3205         _ld_lib='lib%.a'
3206         _ld_path='-libpath:'
3207         _flags='-nologo'
3208         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3209     elif $_cc 2>&1 | grep -q Intel; then
3210         _type=icl
3211         _ident=$($_cc 2>&1 | head -n1)
3212         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3213         # Not only is O3 broken on 13.x+ but it is slower on all previous
3214         # versions (tested) as well.
3215         _cflags_speed="-O2"
3216         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3217         if $_cc 2>&1 | grep -q Linker; then
3218             _ld_o='-out:$@'
3219         else
3220             _ld_o='-Fe$@'
3221         fi
3222         _cc_o='-Fo$@'
3223         _cc_e='-P'
3224         _flags_filter=icl_flags
3225         _ld_lib='lib%.a'
3226         _ld_path='-libpath:'
3227         # -Qdiag-error to make icl error when seeing certain unknown arguments
3228         _flags='-nologo -Qdiag-error:4044,10157'
3229         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3230         # with MSVC which enables it by default.
3231         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3232     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3233         _type=cparser
3234         _ident=$($_cc --version | head -n1)
3235         _depflags='-MMD'
3236         _cflags_speed='-O4'
3237         _cflags_size='-O2'
3238         _flags_filter=cparser_flags
3239     fi
3240
3241     eval ${pfx}_type=\$_type
3242     eval ${pfx}_ident=\$_ident
3243 }
3244
3245 set_ccvars(){
3246     eval ${1}_C=\${_cc_c-\${${1}_C}}
3247     eval ${1}_E=\${_cc_e-\${${1}_E}}
3248     eval ${1}_O=\${_cc_o-\${${1}_O}}
3249
3250     if [ -n "$_depflags" ]; then
3251         eval ${1}_DEPFLAGS=\$_depflags
3252     else
3253         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3254         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3255         eval DEP${1}FLAGS=\$_flags
3256     fi
3257 }
3258
3259 probe_cc cc "$cc"
3260 cflags_filter=$_flags_filter
3261 cflags_speed=$_cflags_speed
3262 cflags_size=$_cflags_size
3263 cflags_noopt=$_cflags_noopt
3264 add_cflags $_flags $_cflags
3265 cc_ldflags=$_ldflags
3266 set_ccvars CC
3267
3268 probe_cc hostcc "$host_cc"
3269 host_cflags_filter=$_flags_filter
3270 add_host_cflags  $_flags $_cflags
3271 set_ccvars HOSTCC
3272
3273 test -n "$cc_type" && enable $cc_type ||
3274     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3275
3276 : ${as_default:=$cc}
3277 : ${objcc_default:=$cc}
3278 : ${dep_cc_default:=$cc}
3279 : ${ld_default:=$cc}
3280 : ${host_ld_default:=$host_cc}
3281 set_default ar as objcc dep_cc ld host_ld
3282
3283 probe_cc as "$as"
3284 asflags_filter=$_flags_filter
3285 add_asflags $_flags $_cflags
3286 set_ccvars AS
3287
3288 probe_cc objcc "$objcc"
3289 objcflags_filter=$_flags_filter
3290 add_objcflags $_flags $_cflags
3291 set_ccvars OBJC
3292
3293 probe_cc ld "$ld"
3294 ldflags_filter=$_flags_filter
3295 add_ldflags $_flags $_ldflags
3296 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3297 LD_O=${_ld_o-$LD_O}
3298 LD_LIB=${_ld_lib-$LD_LIB}
3299 LD_PATH=${_ld_path-$LD_PATH}
3300
3301 probe_cc hostld "$host_ld"
3302 host_ldflags_filter=$_flags_filter
3303 add_host_ldflags $_flags $_ldflags
3304 HOSTLD_O=${_ld_o-$HOSTLD_O}
3305
3306 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3307     probe_cc depcc "$dep_cc"
3308     CCDEP=${_DEPCMD:-$DEPCMD}
3309     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3310     DEPCCFLAGS=$_flags
3311 fi
3312
3313 if $ar 2>&1 | grep -q Microsoft; then
3314     arflags="-nologo"
3315     ar_o='-out:$@'
3316 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3317     arflags="rq"
3318     ar_o='$@'
3319 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3320     arflags='-Xany -r -c'
3321     ar_o='$@'
3322 else
3323     arflags="rc"
3324     ar_o='$@'
3325 fi
3326
3327 add_cflags $extra_cflags
3328 add_objcflags $extra_objcflags
3329 add_asflags $extra_cflags
3330
3331 if test -n "$sysroot"; then
3332     case "$cc_type" in
3333         gcc|llvm_gcc|clang)
3334             add_cppflags --sysroot="$sysroot"
3335             add_ldflags --sysroot="$sysroot"
3336         ;;
3337         tms470)
3338             add_cppflags -I"$sysinclude"
3339             add_ldflags  --sysroot="$sysroot"
3340         ;;
3341     esac
3342 fi
3343
3344 if test "$cpu" = host; then
3345     enabled cross_compile &&
3346         die "--cpu=host makes no sense when cross-compiling."
3347
3348     case "$cc_type" in
3349         gcc|llvm_gcc)
3350             check_native(){
3351                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3352                 sed -n "/cc1.*$1=/{
3353                             s/.*$1=\\([^ ]*\\).*/\\1/
3354                             p
3355                             q
3356                         }" $TMPE
3357             }
3358             cpu=$(check_native -march || check_native -mcpu)
3359         ;;
3360     esac
3361
3362     test "${cpu:-host}" = host &&
3363         die "--cpu=host not supported with compiler $cc"
3364 fi
3365
3366 # Deal with common $arch aliases
3367 case "$arch" in
3368     aarch64|arm64)
3369         arch="aarch64"
3370     ;;
3371     arm*)
3372         arch="arm"
3373     ;;
3374     mips*|IP*)
3375         case "$arch" in
3376         *el)
3377             add_cppflags -EL
3378             add_ldflags -EL
3379         ;;
3380         *eb)
3381             add_cppflags -EB
3382             add_ldflags -EB
3383         ;;
3384         esac
3385         arch="mips"
3386     ;;
3387     parisc*|hppa*)
3388         arch="parisc"
3389     ;;
3390     "Power Macintosh"|ppc*|powerpc*)
3391         arch="ppc"
3392     ;;
3393     s390|s390x)
3394         arch="s390"
3395     ;;
3396     sh4|sh)
3397         arch="sh4"
3398     ;;
3399     sun4u|sparc*)
3400         arch="sparc"
3401     ;;
3402     tilegx|tile-gx)
3403         arch="tilegx"
3404     ;;
3405     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3406         arch="x86"
3407     ;;
3408 esac
3409
3410 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3411 enable $arch
3412
3413 # Add processor-specific flags
3414 if enabled aarch64; then
3415
3416     case $cpu in
3417         armv*)
3418             cpuflags="-march=$cpu"
3419         ;;
3420         *)
3421             cpuflags="-mcpu=$cpu"
3422         ;;
3423     esac
3424
3425 elif enabled alpha; then
3426
3427     cpuflags="-mcpu=$cpu"
3428
3429 elif enabled arm; then
3430
3431     check_arm_arch() {
3432         check_cpp_condition stddef.h \
3433             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3434             $cpuflags
3435     }
3436
3437     probe_arm_arch() {
3438         if   check_arm_arch 4;        then echo armv4;
3439         elif check_arm_arch 4T;       then echo armv4t;
3440         elif check_arm_arch 5;        then echo armv5;
3441         elif check_arm_arch 5E;       then echo armv5e;
3442         elif check_arm_arch 5T;       then echo armv5t;
3443         elif check_arm_arch 5TE;      then echo armv5te;
3444         elif check_arm_arch 5TEJ;     then echo armv5te;
3445         elif check_arm_arch 6;        then echo armv6;
3446         elif check_arm_arch 6J;       then echo armv6j;
3447         elif check_arm_arch 6K;       then echo armv6k;
3448         elif check_arm_arch 6Z;       then echo armv6z;
3449         elif check_arm_arch 6ZK;      then echo armv6zk;
3450         elif check_arm_arch 6T2;      then echo armv6t2;
3451         elif check_arm_arch 7;        then echo armv7;
3452         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3453         elif check_arm_arch 7S;       then echo armv7-a;
3454         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3455         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3456         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3457         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3458         fi
3459     }
3460
3461     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3462
3463     case $cpu in
3464         armv*)
3465             cpuflags="-march=$cpu"
3466             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3467         ;;
3468         *)
3469             cpuflags="-mcpu=$cpu"
3470             case $cpu in
3471                 cortex-a*)                               subarch=armv7a  ;;
3472                 cortex-r*)                               subarch=armv7r  ;;
3473                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3474                 arm11*)                                  subarch=armv6   ;;
3475                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3476                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3477                 *)                             subarch=$(probe_arm_arch) ;;
3478             esac
3479         ;;
3480     esac
3481
3482     case "$subarch" in
3483         armv5t*)    enable fast_clz                ;;
3484         armv[6-8]*) enable fast_clz fast_unaligned ;;
3485     esac
3486
3487 elif enabled avr32; then
3488
3489     case $cpu in
3490         ap7[02]0[0-2])
3491             subarch="avr32_ap"
3492             cpuflags="-mpart=$cpu"
3493         ;;
3494         ap)
3495             subarch="avr32_ap"
3496             cpuflags="-march=$cpu"
3497         ;;
3498         uc3[ab]*)
3499             subarch="avr32_uc"
3500             cpuflags="-mcpu=$cpu"
3501         ;;
3502         uc)
3503             subarch="avr32_uc"
3504             cpuflags="-march=$cpu"
3505         ;;
3506     esac
3507
3508 elif enabled bfin; then
3509
3510     cpuflags="-mcpu=$cpu"
3511
3512 elif enabled mips; then
3513
3514     cpuflags="-march=$cpu"
3515
3516 elif enabled ppc; then
3517
3518     disable ldbrx
3519
3520     case $(tolower $cpu) in
3521         601|ppc601|powerpc601)
3522             cpuflags="-mcpu=601"
3523             disable altivec
3524         ;;
3525         603*|ppc603*|powerpc603*)
3526             cpuflags="-mcpu=603"
3527             disable altivec
3528         ;;
3529         604*|ppc604*|powerpc604*)
3530             cpuflags="-mcpu=604"
3531             disable altivec
3532         ;;
3533         g3|75*|ppc75*|powerpc75*)
3534             cpuflags="-mcpu=750"
3535             disable altivec
3536         ;;
3537         g4|745*|ppc745*|powerpc745*)
3538             cpuflags="-mcpu=7450"
3539             disable vsx
3540         ;;
3541         74*|ppc74*|powerpc74*)
3542             cpuflags="-mcpu=7400"
3543             disable vsx
3544         ;;
3545         g5|970|ppc970|powerpc970)
3546             cpuflags="-mcpu=970"
3547             disable vsx
3548         ;;
3549         power[3-6]*)
3550             cpuflags="-mcpu=$cpu"
3551             disable vsx
3552         ;;
3553         power[7-8]*)
3554             cpuflags="-mcpu=$cpu"
3555             enable ldbrx
3556         ;;
3557         cell)
3558             cpuflags="-mcpu=cell"
3559             enable ldbrx
3560             disable vsx
3561         ;;
3562         e500mc)
3563             cpuflags="-mcpu=e500mc"
3564             disable altivec
3565         ;;
3566         e500v2)
3567             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3568             disable altivec
3569             disable dcbzl
3570         ;;
3571         e500)
3572             cpuflags="-mcpu=8540 -mhard-float"
3573             disable altivec
3574             disable dcbzl
3575         ;;
3576     esac
3577
3578 elif enabled sparc; then
3579
3580     case $cpu in
3581         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3582             cpuflags="-mcpu=$cpu"
3583         ;;
3584         ultrasparc*|niagara[234])
3585             cpuflags="-mcpu=$cpu"
3586         ;;
3587     esac
3588
3589 elif enabled x86; then
3590
3591     case $cpu in
3592         i[345]86|pentium)
3593             cpuflags="-march=$cpu"
3594             disable i686
3595             disable mmx
3596         ;;
3597         # targets that do NOT support nopl and conditional mov (cmov)
3598         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3599             cpuflags="-march=$cpu"
3600             disable i686
3601         ;;
3602         # targets that do support nopl and conditional mov (cmov)
3603         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3604             cpuflags="-march=$cpu"
3605             enable i686
3606             enable fast_cmov
3607         ;;
3608         # targets that do support conditional mov but on which it's slow
3609         pentium4|pentium4m|prescott|nocona)
3610             cpuflags="-march=$cpu"
3611             enable i686
3612             disable fast_cmov
3613         ;;
3614     esac
3615
3616 fi
3617
3618 if [ "$cpu" != generic ]; then
3619     add_cflags  $cpuflags
3620     add_asflags $cpuflags
3621     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3622 fi
3623
3624 # compiler sanity check
3625 check_exec <<EOF
3626 int main(void){ return 0; }
3627 EOF
3628 if test "$?" != 0; then
3629     echo "$cc is unable to create an executable file."
3630     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3631         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3632         echo "Only do this if you know what cross compiling means."
3633     fi
3634     die "C compiler test failed."
3635 fi
3636
3637 add_cppflags -D_ISOC99_SOURCE
3638 check_cflags -std=c99
3639 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3640 #include <stdlib.h>
3641 EOF
3642 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3643 #include <stdlib.h>
3644 EOF
3645
3646 add_host_cppflags -D_ISOC99_SOURCE
3647 check_host_cflags -std=c99
3648 check_host_cflags -Wall
3649 check_host_cflags -O3
3650
3651 check_64bit(){
3652     arch32=$1
3653     arch64=$2
3654     expr=$3
3655     check_code cc "" "int test[2*($expr) - 1]" &&
3656         subarch=$arch64 || subarch=$arch32
3657 }
3658
3659 case "$arch" in
3660     aarch64|alpha|ia64)
3661         spic=$shared
3662     ;;
3663     mips)
3664         check_64bit mips mips64 '_MIPS_SIM > 1'
3665         spic=$shared
3666     ;;
3667     parisc)
3668         check_64bit parisc parisc64 'sizeof(void *) > 4'
3669         spic=$shared
3670     ;;
3671     ppc)
3672         check_64bit ppc ppc64 'sizeof(void *) > 4'
3673         spic=$shared
3674     ;;
3675     s390)
3676         check_64bit s390 s390x 'sizeof(void *) > 4'
3677         spic=$shared
3678     ;;
3679     sparc)
3680         check_64bit sparc sparc64 'sizeof(void *) > 4'
3681         spic=$shared
3682     ;;
3683     x86)
3684         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3685         if test "$subarch" = "x86_64"; then
3686             spic=$shared
3687         fi
3688     ;;
3689 esac
3690
3691 enable $subarch
3692 enabled spic && enable_weak pic
3693
3694 # OS specific
3695 case $target_os in
3696     aix)
3697         SHFLAGS=-shared
3698         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3699         enabled shared && add_ldflags -Wl,-brtl
3700         ;;
3701     android)
3702         disable symver
3703         enable section_data_rel_ro
3704         SLIB_INSTALL_NAME='$(SLIBNAME)'
3705         SLIB_INSTALL_LINKS=
3706         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3707         ;;
3708     haiku)
3709         prefix_default="/boot/common"
3710         network_extralibs="-lnetwork"
3711         host_libs=
3712         ;;
3713     sunos)
3714         SHFLAGS='-shared -Wl,-h,$$(@F)'
3715         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3716         network_extralibs="-lsocket -lnsl"
3717         # When using suncc to build, the Solaris linker will mark
3718         # an executable with each instruction set encountered by
3719         # the Solaris assembler.  As our libraries contain their own
3720         # guards for processor-specific code, instead suppress
3721         # generation of the HWCAPS ELF section on Solaris x86 only.
3722         enabled_all suncc x86 &&
3723             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3724             add_ldflags -Wl,-M,mapfile
3725         nm_default='nm -P -g'
3726         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3727         ;;
3728     netbsd)
3729         disable symver
3730         oss_indev_extralibs="-lossaudio"
3731         oss_outdev_extralibs="-lossaudio"
3732         ;;
3733     openbsd|bitrig)
3734         disable symver
3735         SHFLAGS='-shared'
3736         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3737         SLIB_INSTALL_LINKS=
3738         oss_indev_extralibs="-lossaudio"
3739         oss_outdev_extralibs="-lossaudio"
3740         ;;
3741     dragonfly)
3742         disable symver
3743         ;;
3744     freebsd)
3745         ;;
3746     bsd/os)
3747         add_extralibs -lpoll -lgnugetopt
3748         ;;
3749     darwin)
3750         enabled ppc && add_asflags -force_cpusubtype_ALL
3751         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3752         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3753         add_ldflags -Wl,-dynamic,-search_paths_first
3754         SLIBSUF=".dylib"
3755         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3756         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3757         objformat="macho"
3758         enabled x86_64 && objformat="macho64"
3759         enabled_any pic shared ||
3760             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3761         ;;
3762     msys*)
3763         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3764         ;;
3765     mingw32*|mingw64*)
3766         if test $target_os = "mingw32ce"; then
3767             disable network
3768         else
3769             target_os=mingw32
3770         fi
3771         LIBTARGET=i386
3772         if enabled x86_64; then
3773             LIBTARGET="i386:x86-64"
3774         elif enabled arm; then
3775             LIBTARGET=arm-wince
3776         fi
3777         check_ldflags -Wl,--nxcompat
3778         check_ldflags -Wl,--dynamicbase
3779         shlibdir_default="$bindir_default"
3780         SLIBPREF=""
3781         SLIBSUF=".dll"
3782         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3783         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3784         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3785         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3786         SLIB_INSTALL_LINKS=
3787         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3788         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3789         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3790         objformat="win32"
3791         dlltool="${cross_prefix}dlltool"
3792         ranlib=:
3793         enable dos_paths
3794         ;;
3795     win32|win64)
3796         disable symver
3797         if enabled shared; then
3798             # Link to the import library instead of the normal static library
3799             # for shared libs.
3800             LD_LIB='%.lib'
3801             # Cannot build both shared and static libs with MSVC or icl.
3802             disable static
3803         fi
3804         shlibdir_default="$bindir_default"
3805         SLIBPREF=""
3806         SLIBSUF=".dll"
3807         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3808         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3809         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3810         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3811         SLIB_INSTALL_LINKS=
3812         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3813         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3814         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3815         objformat="win32"
3816         ranlib=:
3817         enable dos_paths
3818         ;;
3819     cygwin*)
3820         target_os=cygwin
3821         shlibdir_default="$bindir_default"
3822         SLIBPREF="cyg"
3823         SLIBSUF=".dll"
3824         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3825         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3826         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3827         SLIB_INSTALL_LINKS=
3828         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3829         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3830         objformat="win32"
3831         enable dos_paths
3832         ;;
3833     *-dos|freedos|opendos)
3834         network_extralibs="-lsocket"
3835         objformat="coff"
3836         enable dos_paths
3837         add_cppflags -U__STRICT_ANSI__
3838         ;;
3839     linux)
3840         enable dv1394
3841         enable section_data_rel_ro
3842         ;;
3843     irix*)
3844         target_os=irix
3845         ranlib="echo ignoring ranlib"
3846         ;;
3847     os/2*)
3848         ln_s="cp -f"
3849         objformat="aout"
3850         add_cppflags -D_GNU_SOURCE
3851         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3852         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3853         LIBSUF="_s.a"
3854         SLIBPREF=""
3855         SLIBSUF=".dll"
3856         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3857         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3858         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3859             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3860             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3861             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3862             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3863         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3864             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3865         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3866         enable dos_paths
3867         ;;
3868     gnu/kfreebsd)
3869         add_cppflags -D_BSD_SOURCE
3870         ;;
3871     gnu)
3872         ;;
3873     qnx)
3874         add_cppflags -D_QNX_SOURCE
3875         network_extralibs="-lsocket"
3876         ;;
3877     symbian)
3878         SLIBSUF=".dll"
3879         enable dos_paths
3880         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3881         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3882         add_ldflags -Wl,--target1-abs,--no-undefined \
3883                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3884                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3885         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3886                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3887                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3888         ;;
3889     osf1)
3890         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3891         ;;
3892     minix)
3893         ;;
3894     plan9)
3895         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3896                      -D_REENTRANT_SOURCE        \
3897                      -D_RESEARCH_SOURCE         \
3898                      -DFD_SETSIZE=96            \
3899                      -DHAVE_SOCK_OPTS
3900         add_compat strtod.o strtod=avpriv_strtod
3901         network_extralibs='-lbsd'
3902         exeobjs=compat/plan9/main.o
3903         cp_f='cp'
3904         ;;
3905     none)
3906         ;;
3907     *)
3908         die "Unknown OS '$target_os'."
3909         ;;
3910 esac
3911
3912 # determine libc flavour
3913
3914 probe_libc(){
3915     pfx=$1
3916     pfx_no_=${pfx%_}
3917     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3918     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3919         eval ${pfx}libc_type=uclibc
3920         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3921     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3922         eval ${pfx}libc_type=glibc
3923         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3924     # MinGW headers can be installed on Cygwin, so check for newlib first.
3925     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3926         eval ${pfx}libc_type=newlib
3927         add_${pfx}cppflags -U__STRICT_ANSI__
3928     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3929     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3930         eval ${pfx}libc_type=mingw64
3931         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3932         eval test \$${pfx_no_}cc_type = "gcc" &&
3933             add_${pfx}cppflags -D__printf__=__gnu_printf__
3934     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3935          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3936         eval ${pfx}libc_type=mingw32
3937         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3938             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3939             die "ERROR: MinGW32 runtime version must be >= 3.15."
3940         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3941         eval test \$${pfx_no_}cc_type = "gcc" &&
3942             add_${pfx}cppflags -D__printf__=__gnu_printf__
3943     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3944         eval ${pfx}libc_type=msvcrt
3945         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3946             if [ "$pfx" = host_ ]; then
3947                 add_host_cppflags -Dsnprintf=_snprintf
3948             else
3949                 add_compat strtod.o strtod=avpriv_strtod
3950                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3951                                              _snprintf=avpriv_snprintf  \
3952                                              vsnprintf=avpriv_vsnprintf
3953             fi
3954         fi
3955         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3956         # 0x601 by default unless something else is set by the user.
3957         # This can easily lead to us detecting functions only present
3958         # in such new versions and producing binaries requiring windows 7.0.
3959         # Therefore explicitly set the default to XP unless the user has
3960         # set something else on the command line.
3961         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3962         # family. For these cases, configure is free to use any functions
3963         # found in the SDK headers by default. (Alternatively, we could force
3964         # _WIN32_WINNT to 0x0602 in that case.)
3965         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3966             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3967 #ifdef WINAPI_FAMILY
3968 #include <winapifamily.h>
3969 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3970 #error not desktop
3971 #endif
3972 #endif
3973 EOF
3974     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3975         eval ${pfx}libc_type=klibc
3976     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3977         eval ${pfx}libc_type=bionic
3978     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3979         eval ${pfx}libc_type=solaris
3980         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3981     else
3982         eval ${pfx}libc_type=default
3983         add_${pfx}cppflags -D_DEFAULT_SOURCE
3984     fi
3985 }
3986
3987 probe_libc
3988 test -n "$libc_type" && enable libc_$libc_type
3989 probe_libc host_
3990 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3991
3992 case $libc_type in
3993     bionic)
3994         add_compat strtod.o strtod=avpriv_strtod
3995         ;;
3996 esac
3997
3998 # hacks for compiler/libc/os combinations
3999
4000 if enabled_all tms470 libc_glibc; then
4001     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4002     add_cppflags -D__USER_LABEL_PREFIX__=
4003     add_cppflags -D__builtin_memset=memset
4004     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4005     add_cflags   -pds=48    # incompatible redefinition of macro
4006 fi
4007
4008 if enabled_all ccc libc_glibc; then
4009     add_ldflags -Wl,-z,now  # calls to libots crash without this
4010 fi
4011
4012 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4013     add_cppflags '-I\$(SRC_PATH)/compat/float'
4014
4015 esc(){
4016     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4017 }
4018
4019 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4020
4021 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4022
4023 set_default $PATHS_LIST
4024 set_default nm
4025
4026 # we need to build at least one lib type
4027 if ! enabled_any static shared; then
4028     cat <<EOF
4029 At least one library type must be built.
4030 Specify --enable-static to build the static libraries or --enable-shared to
4031 build the shared libraries as well. To only build the shared libraries specify
4032 --disable-static in addition to --enable-shared.
4033 EOF
4034     exit 1;
4035 fi
4036
4037 die_license_disabled() {
4038     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4039 }
4040
4041 die_license_disabled gpl libcdio
4042 die_license_disabled gpl libx264
4043 die_license_disabled gpl libx265
4044 die_license_disabled gpl libxavs
4045 die_license_disabled gpl libxvid
4046 die_license_disabled gpl x11grab
4047
4048 die_license_disabled nonfree cuda
4049 die_license_disabled nonfree libfaac
4050 die_license_disabled nonfree libfdk_aac
4051 die_license_disabled nonfree nvenc
4052 die_license_disabled nonfree openssl
4053
4054 die_license_disabled version3 libopencore_amrnb
4055 die_license_disabled version3 libopencore_amrwb
4056 die_license_disabled version3 libvo_aacenc
4057 die_license_disabled version3 libvo_amrwbenc
4058
4059 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4060
4061 disabled optimizations || check_cflags -fomit-frame-pointer
4062
4063 enable_weak_pic() {