lavfi: add a filter for uploading normal frames to CUDA
[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 hwupload_cuda_filter_deps="cuda"
2386 interlace_filter_deps="gpl"
2387 ocv_filter_deps="libopencv"
2388 resample_filter_deps="avresample"
2389 scale_filter_deps="swscale"
2390
2391 # examples
2392 avcodec_example_deps="avcodec avutil"
2393 filter_audio_example_deps="avfilter avutil"
2394 metadata_example_deps="avformat avutil"
2395 output_example_deps="avcodec avformat avutil swscale"
2396 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2397 transcode_aac_example_deps="avcodec avformat avresample"
2398
2399 # libraries, in linking order
2400 avcodec_deps="avutil"
2401 avdevice_deps="avformat avcodec avutil"
2402 avfilter_deps="avutil"
2403 avformat_deps="avcodec avutil"
2404 avresample_deps="avutil"
2405 swscale_deps="avutil"
2406
2407 # programs
2408 avconv_deps="avcodec avfilter avformat avresample swscale"
2409 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2410                fps_filter null_filter resample_filter scale_filter
2411                setpts_filter trim_filter"
2412 avplay_deps="avcodec avfilter avformat avresample sdl"
2413 avplay_libs='$sdl_libs'
2414 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2415 avprobe_deps="avcodec avformat"
2416
2417 # documentation
2418 pod2man_deps="doc"
2419 texi2html_deps="doc"
2420
2421 # default parameters
2422
2423 logfile="config.log"
2424
2425 # installation paths
2426 prefix_default="/usr/local"
2427 bindir_default='${prefix}/bin'
2428 datadir_default='${prefix}/share/avconv'
2429 docdir_default='${prefix}/share/doc/libav'
2430 incdir_default='${prefix}/include'
2431 libdir_default='${prefix}/lib'
2432 mandir_default='${prefix}/share/man'
2433 shlibdir_default="$libdir_default"
2434
2435 # toolchain
2436 ar_default="ar"
2437 cc_default="gcc"
2438 host_cc_default="gcc"
2439 cp_f="cp -f"
2440 ln_s="ln -s -f"
2441 nm_default="nm -g"
2442 objformat="elf"
2443 pkg_config_default=pkg-config
2444 ranlib="ranlib"
2445 strip="strip"
2446 yasmexe="yasm"
2447
2448 # machine
2449 arch_default=$(uname -m)
2450 cpu="generic"
2451 intrinsics="none"
2452
2453 # OS
2454 target_os_default=$(tolower $(uname -s))
2455 host_os=$target_os_default
2456
2457 # configurable options
2458 enable asm
2459 enable debug
2460 enable doc
2461 enable faan faandct faanidct
2462 enable optimizations
2463 enable safe_bitstream_reader
2464 enable static
2465 enable swscale_alpha
2466 enable valgrind_backtrace
2467
2468 # By default, enable only those hwaccels that have no external dependencies.
2469 enable d3d11va dxva2 vda vdpau
2470
2471 # build settings
2472 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2473 LIBPREF="lib"
2474 LIBSUF=".a"
2475 FULLNAME='$(NAME)$(BUILDSUF)'
2476 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2477 SLIBPREF="lib"
2478 SLIBSUF=".so"
2479 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2480 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2481 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2482 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2483 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2484 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2485
2486 asflags_filter=echo
2487 cflags_filter=echo
2488 ldflags_filter=echo
2489
2490 AS_C='-c'
2491 AS_O='-o $@'
2492 CC_C='-c'
2493 CC_E='-E -o $@'
2494 CC_O='-o $@'
2495 OBJCC_C='-c'
2496 OBJCC_E='-E -o $@'
2497 OBJCC_O='-o $@'
2498 LD_O='-o $@'
2499 LD_LIB='-l%'
2500 LD_PATH='-L'
2501 HOSTCC_C='-c'
2502 HOSTCC_E='-E -o $@'
2503 HOSTCC_O='-o $@'
2504 HOSTLD_O='-o $@'
2505
2506 host_libs='-lm'
2507 host_cflags_filter=echo
2508 host_ldflags_filter=echo
2509
2510 target_path='$(CURDIR)'
2511
2512 # since the object filename is not given with the -MM flag, the compiler
2513 # is only able to print the basename, and we must add the path ourselves
2514 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2515 DEPFLAGS='-MM'
2516
2517 # find source path
2518 if test -f configure; then
2519     source_path=.
2520 else
2521     source_path=$(cd $(dirname "$0"); pwd)
2522     echo "$source_path" | grep -q '[[:blank:]]' &&
2523         die "Out of tree builds are impossible with whitespace in source path."
2524     test -e "$source_path/config.h" &&
2525         die "Out of tree builds are impossible with config.h in source dir."
2526 fi
2527
2528 for v in "$@"; do
2529     r=${v#*=}
2530     l=${v%"$r"}
2531     r=$(sh_quote "$r")
2532     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2533 done
2534
2535 find_things(){
2536     thing=$1
2537     pattern=$2
2538     file=$source_path/$3
2539     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2540 }
2541
2542 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2543 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2544 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2545 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2546 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2547 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2548 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2549 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2550 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2551 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2552 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2553
2554 ALL_COMPONENTS="
2555     $BSF_LIST
2556     $DECODER_LIST
2557     $DEMUXER_LIST
2558     $ENCODER_LIST
2559     $FILTER_LIST
2560     $HWACCEL_LIST
2561     $INDEV_LIST
2562     $MUXER_LIST
2563     $OUTDEV_LIST
2564     $PARSER_LIST
2565     $PROTOCOL_LIST
2566 "
2567
2568 enable $ARCH_EXT_LIST
2569
2570 die_unknown(){
2571     echo "Unknown option \"$1\"."
2572     echo "See $0 --help for available options."
2573     exit 1
2574 }
2575
2576 print_3_columns() {
2577     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2578 }
2579
2580 show_list() {
2581     suffix=_$1
2582     shift
2583     echo $* | sed s/$suffix//g | print_3_columns
2584     exit 0
2585 }
2586
2587 rand_list(){
2588     IFS=', '
2589     set -- $*
2590     unset IFS
2591     for thing; do
2592         comp=${thing%:*}
2593         prob=${thing#$comp}
2594         prob=${prob#:}
2595         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2596         echo "prob ${prob:-0.5}"
2597         printf '%s\n' $comp
2598     done
2599 }
2600
2601 do_random(){
2602     action=$1
2603     shift
2604     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2605     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2606 }
2607
2608 for opt do
2609     optval="${opt#*=}"
2610     case "$opt" in
2611         --extra-ldflags=*)
2612             add_ldflags $optval
2613         ;;
2614         --extra-ldexeflags=*)
2615             add_ldexeflags $optval
2616         ;;
2617         --extra-libs=*)
2618             add_extralibs $optval
2619         ;;
2620         --disable-devices)
2621             disable $INDEV_LIST $OUTDEV_LIST
2622         ;;
2623         --enable-debug=*)
2624             debuglevel="$optval"
2625         ;;
2626         --disable-programs)
2627             disable $PROGRAM_LIST
2628         ;;
2629         --disable-everything)
2630             map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2631             enable_deep_force $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2632         ;;
2633         --disable-all)
2634             map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2635             disable $LIBRARY_LIST $PROGRAM_LIST doc
2636         ;;
2637         --enable-random|--disable-random)
2638             action=${opt%%-random}
2639             do_random ${action#--} $COMPONENT_LIST
2640         ;;
2641         --enable-random=*|--disable-random=*)
2642             action=${opt%%-random=*}
2643             do_random ${action#--} $optval
2644         ;;
2645         --enable-*=*|--disable-*=*)
2646             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2647             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2648             eval list=\$$(toupper $thing)_LIST
2649             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2650             test $action = enable && action="request"
2651             $action $(filter "$name" $list)
2652         ;;
2653         --enable-avserver|--disable-avserver*)
2654             warn "avserver has been removed, the ${opt} option is only"\
2655                  "provided for compatibility and will be removed in the future"
2656         ;;
2657         --enable-?*|--disable-?*)
2658             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2659             test $action = enable && action="request"
2660             if is_in $option $COMPONENT_LIST; then
2661                 eval $action \$$(toupper ${option%s})_LIST
2662             elif is_in $option $CMDLINE_SELECT; then
2663                 $action $option
2664             else
2665                 die_unknown $opt
2666             fi
2667         ;;
2668         --list-*)
2669             NAME="${opt#--list-}"
2670             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2671             NAME=${NAME%s}
2672             eval show_list $NAME \$$(toupper $NAME)_LIST
2673         ;;
2674         --help|-h) show_help
2675         ;;
2676         *)
2677             optname="${opt%%=*}"
2678             optname="${optname#--}"
2679             optname=$(echo "$optname" | sed 's/-/_/g')
2680             if is_in $optname $CMDLINE_SET; then
2681                 eval $optname='$optval'
2682             elif is_in $optname $CMDLINE_APPEND; then
2683                 append $optname "$optval"
2684             else
2685                 die_unknown $opt
2686             fi
2687         ;;
2688     esac
2689 done
2690
2691 for e in $env; do
2692     eval "export $e"
2693 done
2694
2695 disabled logging && logfile=/dev/null
2696
2697 # Enable the default components if not disabled explicitly
2698
2699 enable_weak $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2700
2701 # Disable all the library-specific components if the library itself
2702 # is disabled, see AVCODEC_LIST and following _LIST variables.
2703
2704 disable_components(){
2705     disabled ${1} && disable_weak $(
2706         eval components="\$$(toupper ${1})_COMPONENTS"
2707         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2708     )
2709 }
2710
2711 map 'disable_components $v' $LIBRARY_LIST
2712
2713 # Mark components that had not been enabled/disabled explicitly
2714 # as enabled
2715
2716 for n in $COMPONENT_LIST; do
2717     v=$(toupper ${n%s})_LIST
2718     eval enable_weak \$$v
2719     eval ${n}_if_any="\$$v"
2720 done
2721
2722 # Make so that disabled libraries are enabled if a component
2723 # of them is requested
2724
2725 for n in $LIBRARY_LIST; do
2726     v=$(toupper ${n})_COMPONENTS
2727     eval ${n}_if_any="\$$v"
2728 done
2729
2730 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2731 set >> $logfile
2732
2733 case "$toolchain" in
2734     *-asan)
2735         cc_default="${toolchain%-asan}"
2736         add_cflags  -fsanitize=address
2737         add_ldflags -fsanitize=address
2738     ;;
2739     *-tsan)
2740         cc_default="${toolchain%-tsan}"
2741         add_cflags  -fsanitize=thread -pie
2742         add_ldflags -fsanitize=thread -pie
2743         case "$toolchain" in
2744             gcc-tsan)
2745                 add_cflags  -fPIC
2746                 add_ldflags -fPIC
2747                 ;;
2748         esac
2749     ;;
2750     *-usan)
2751         cc_default="${toolchain%-usan}"
2752         add_cflags  -fsanitize=undefined
2753         add_ldflags -fsanitize=undefined
2754         case "$toolchain" in
2755             clang-usan)
2756                 add_cflags -O1
2757                 ;;
2758         esac
2759     ;;
2760     valgrind-*)
2761         target_exec_default="valgrind"
2762         case "$toolchain" in
2763             valgrind-massif)
2764                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2765                 ;;
2766             valgrind-memcheck)
2767                 target_exec_args="--track-origins=yes --leak-check=full"
2768                 ;;
2769         esac
2770     ;;
2771     msvc)
2772         # Check whether the current MSVC version needs the C99 converter.
2773         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2774         # support enough of C99 to build libav. Default to the new
2775         # behaviour if the regexp was unable to match anything, since this
2776         # successfully parses the version number of existing supported
2777         # versions that require the converter (MSVC 2010 and 2012).
2778         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2779         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2780             cc_default="cl"
2781         else
2782             cc_default="c99wrap cl"
2783         fi
2784         ld_default="$source_path/compat/windows/mslink"
2785         nm_default="dumpbin -symbols"
2786         ar_default="lib"
2787         case "$arch" in
2788         arm*)
2789             as_default="armasm"
2790             ;;
2791         esac
2792         target_os_default="win32"
2793         # Use a relative path for TMPDIR. This makes sure all the
2794         # ffconf temp files are written with a relative path, avoiding
2795         # issues with msys/win32 path conversion for MSVC parameters
2796         # such as -Fo<file> or -out:<file>.
2797         TMPDIR=.
2798     ;;
2799     icl)
2800         cc_default="icl"
2801         ld_default="xilink"
2802         nm_default="dumpbin -symbols"
2803         ar_default="xilib"
2804         target_os_default="win32"
2805         TMPDIR=.
2806     ;;
2807     gcov)
2808         add_cflags  -fprofile-arcs -ftest-coverage
2809         add_ldflags -fprofile-arcs -ftest-coverage
2810     ;;
2811     hardened)
2812         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2813         add_cflags   -fno-strict-overflow -fstack-protector-all
2814         add_ldflags  -Wl,-z,relro -Wl,-z,now
2815     ;;
2816     ?*)
2817         die "Unknown toolchain $toolchain"
2818     ;;
2819 esac
2820
2821 test -n "$cross_prefix" && enable cross_compile
2822
2823 if enabled cross_compile; then
2824     test -n "$arch" && test -n "$target_os" ||
2825         die "Must specify target arch and OS when cross-compiling"
2826 fi
2827
2828 ar_default="${cross_prefix}${ar_default}"
2829 cc_default="${cross_prefix}${cc_default}"
2830 occ_default="${cross_prefix}${occ_default}"
2831 nm_default="${cross_prefix}${nm_default}"
2832 pkg_config_default="${cross_prefix}${pkg_config_default}"
2833 ranlib="${cross_prefix}${ranlib}"
2834 strip="${cross_prefix}${strip}"
2835
2836 sysinclude_default="${sysroot}/usr/include"
2837
2838 set_default arch cc pkg_config sysinclude target_exec target_os
2839 enabled cross_compile || host_cc_default=$cc
2840 set_default host_cc
2841
2842 if ! $pkg_config --version >/dev/null 2>&1; then
2843     warn "$pkg_config not found, library detection may fail."
2844     pkg_config=false
2845 fi
2846
2847 exesuf() {
2848     case $1 in
2849         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2850     esac
2851 }
2852
2853 EXESUF=$(exesuf $target_os)
2854 HOSTEXESUF=$(exesuf $host_os)
2855
2856 # set temporary file name
2857 : ${TMPDIR:=$TEMPDIR}
2858 : ${TMPDIR:=$TMP}
2859 : ${TMPDIR:=/tmp}
2860
2861 if ! check_cmd mktemp -u XXXXXX; then
2862     # simple replacement for missing mktemp
2863     # NOT SAFE FOR GENERAL USE
2864     mktemp(){
2865         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2866     }
2867 fi
2868
2869 tmpfile(){
2870     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2871         (set -C; exec > $tmp) 2>/dev/null ||
2872         die "Unable to create temporary file in $TMPDIR."
2873     append TMPFILES $tmp
2874     eval $1=$tmp
2875 }
2876
2877 trap 'rm -f -- $TMPFILES' EXIT
2878
2879 tmpfile TMPASM .asm
2880 tmpfile TMPC   .c
2881 tmpfile TMPE   $EXESUF
2882 tmpfile TMPH   .h
2883 tmpfile TMPO   .o
2884 tmpfile TMPS   .S
2885 tmpfile TMPSH  .sh
2886 tmpfile TMPV   .ver
2887
2888 unset -f mktemp
2889
2890 chmod +x $TMPE
2891
2892 # make sure we can execute files in $TMPDIR
2893 cat > $TMPSH 2>> $logfile <<EOF
2894 #! /bin/sh
2895 EOF
2896 chmod +x $TMPSH >> $logfile 2>&1
2897 if ! $TMPSH >> $logfile 2>&1; then
2898     cat <<EOF
2899 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2900 variable to another directory and make sure that it is not mounted noexec.
2901 EOF
2902     die "Sanity test failed."
2903 fi
2904
2905 armasm_flags(){
2906     for flag; do
2907         case $flag in
2908             # Filter out MSVC cl.exe options from cflags that shouldn't
2909             # be passed to gas-preprocessor
2910             -M[TD]*)                                            ;;
2911             *)                  echo $flag                      ;;
2912         esac
2913    done
2914 }
2915
2916 ccc_flags(){
2917     for flag; do
2918         case $flag in
2919             -std=c99)           echo -c99                       ;;
2920             -mcpu=*)            echo -arch ${flag#*=}           ;;
2921             -mieee)             echo -ieee                      ;;
2922             -O*|-fast)          echo $flag                      ;;
2923             -fno-math-errno)    echo -assume nomath_errno       ;;
2924             -g)                 echo -g3                        ;;
2925             -Wall)              echo -msg_enable level2         ;;
2926             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2927             -Wl,*)              echo $flag                      ;;
2928             -f*|-W*)                                            ;;
2929             *)                  echo $flag                      ;;
2930         esac
2931    done
2932 }
2933
2934 cparser_flags(){
2935     for flag; do
2936         case $flag in
2937             -Wno-switch)             echo -Wno-switch-enum ;;
2938             -Wno-format-zero-length) ;;
2939             -Wdisabled-optimization) ;;
2940             -Wno-pointer-sign)       echo -Wno-other ;;
2941             *)                       echo $flag ;;
2942         esac
2943     done
2944 }
2945
2946 msvc_common_flags(){
2947     for flag; do
2948         case $flag in
2949             # In addition to specifying certain flags under the compiler
2950             # specific filters, they must be specified here as well or else the
2951             # generic catch all at the bottom will print the original flag.
2952             -Wall)                ;;
2953             -std=c99)             ;;
2954             # Common flags
2955             -fomit-frame-pointer) ;;
2956             -g)                   echo -Z7 ;;
2957             -fno-math-errno)      ;;
2958             -fno-common)          ;;
2959             -fno-signed-zeros)    ;;
2960             -fPIC)                ;;
2961             -mthumb)              ;;
2962             -march=*)             ;;
2963             -lz)                  echo zlib.lib ;;
2964             -lavifil32)           echo vfw32.lib ;;
2965             -lavicap32)           echo vfw32.lib user32.lib ;;
2966             -lx264)               echo libx264.lib ;;
2967             -l*)                  echo ${flag#-l}.lib ;;
2968             -L*)                  echo -libpath:${flag#-L} ;;
2969             *)                    echo $flag ;;
2970         esac
2971     done
2972 }
2973
2974 msvc_flags(){
2975     msvc_common_flags "$@"
2976     for flag; do
2977         case $flag in
2978             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2979                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2980                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2981                                        -wd4273 -wd4554 -wd4701 ;;
2982         esac
2983     done
2984 }
2985
2986 icl_flags(){
2987     msvc_common_flags "$@"
2988     for flag; do
2989         case $flag in
2990             # Despite what Intel's documentation says -Wall, which is supported
2991             # on Windows, does enable remarks so disable them here.
2992             -Wall)                echo $flag -Qdiag-disable:remark ;;
2993             -std=c99)             echo -Qstd=c99 ;;
2994         esac
2995     done
2996 }
2997
2998 pgi_flags(){
2999     for flag; do
3000         case $flag in
3001             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3002             -fomit-frame-pointer) echo -Mnoframe ;;
3003             -g)                   echo -gopt ;;
3004             *)                    echo $flag ;;
3005         esac
3006     done
3007 }
3008
3009 suncc_flags(){
3010     for flag; do
3011         case $flag in
3012             -march=*|-mcpu=*)
3013                 case "${flag#*=}" in
3014                     native)                   echo -xtarget=native       ;;
3015                     v9|niagara)               echo -xarch=sparc          ;;
3016                     ultrasparc)               echo -xarch=sparcvis       ;;
3017                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3018                     i586|pentium)             echo -xchip=pentium        ;;
3019                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3020                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3021                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3022                     pentium4*)          echo -xtarget=pentium4           ;;
3023                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3024                     *-sse3)             echo -xarch=sse3                 ;;
3025                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3026                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3027                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3028                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3029                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3030                     k8|opteron|athlon64|athlon-fx)
3031                                                echo -xarch=sse2a         ;;
3032                     athlon*)                   echo -xarch=pentium_proa  ;;
3033                 esac
3034                 ;;
3035             -std=c99)             echo -xc99              ;;
3036             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3037             -fPIC)                echo -KPIC -xcode=pic32 ;;
3038             -W*,*)                echo $flag              ;;
3039             -f*-*|-W*|-mimpure-text)                      ;;
3040             -shared)              echo -G                 ;;
3041             *)                    echo $flag              ;;
3042         esac
3043     done
3044 }
3045
3046 tms470_flags(){
3047     for flag; do
3048         case $flag in
3049             -march=*|-mcpu=*)
3050                 case "${flag#*=}" in
3051                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3052                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3053                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3054                     armv6*|arm11*)          echo -mv=6   ;;
3055                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3056                                             echo -mv=5e  ;;
3057                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3058                 esac
3059                 ;;
3060             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3061             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3062             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3063             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3064             -msoft-float)   echo --float_support=vfplib       ;;
3065             -O[0-3]|-mf=*)  echo $flag                        ;;
3066             -g)             echo -g -mn                       ;;
3067             -pds=*)         echo $flag                        ;;
3068             -D*|-I*)        echo $flag                        ;;
3069             --gcc|--abi=*)  echo $flag                        ;;
3070             -me)            echo $flag                        ;;
3071         esac
3072     done
3073 }
3074
3075 probe_cc(){
3076     pfx=$1
3077     _cc=$2
3078
3079     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3080     unset _ld_o _ldflags _ld_lib _ld_path
3081     unset _depflags _DEPCMD _DEPFLAGS
3082     _flags_filter=echo
3083
3084     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3085         _type=llvm_gcc
3086         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3087         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3088         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3089         _cflags_speed='-O3'
3090         _cflags_size='-Os'
3091     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3092         _type=gcc
3093         gcc_version=$($_cc --version | head -n1)
3094         gcc_basever=$($_cc -dumpversion)
3095         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3096         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3097         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3098         if ! $_cc -dumpversion | grep -q '^2\.'; then
3099             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3100         fi
3101         _cflags_speed='-O3'
3102         _cflags_size='-Os'
3103     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3104         _type=icc
3105         _ident=$($_cc --version | head -n1)
3106         _depflags='-MMD'
3107         _cflags_speed='-O3'
3108         _cflags_size='-Os'
3109         _cflags_noopt='-O1'
3110     elif $_cc -v 2>&1 | grep -q xlc; then
3111         _type=xlc
3112         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3113         _cflags_speed='-O5'
3114         _cflags_size='-O5 -qcompact'
3115     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3116         _type=ccc
3117         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3118         _DEPFLAGS='-M'
3119         _cflags_speed='-fast'
3120         _cflags_size='-O1'
3121         _flags_filter=ccc_flags
3122     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3123         test -d "$sysroot" || die "No valid sysroot specified."
3124         _type=armcc
3125         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3126         armcc_conf="$PWD/armcc.conf"
3127         $_cc --arm_linux_configure                 \
3128              --arm_linux_config_file="$armcc_conf" \
3129              --configure_sysroot="$sysroot"        \
3130              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3131              die "Error creating armcc configuration file."
3132         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3133         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3134         as_default="${cross_prefix}gcc"
3135         _depflags='-MMD'
3136         _cflags_speed='-O3'
3137         _cflags_size='-Os'
3138     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3139         _type=tms470
3140         _ident=$($_cc -version | head -n1 | tr -s ' ')
3141         _flags='--gcc --abi=eabi -me'
3142         _cc_e='-ppl -fe=$@'
3143         _cc_o='-fe=$@'
3144         _depflags='-ppa -ppd=$(@:.o=.d)'
3145         _cflags_speed='-O3 -mf=5'
3146         _cflags_size='-O3 -mf=2'
3147         _flags_filter=tms470_flags
3148     elif $_cc -v 2>&1 | grep -q clang; then
3149         _type=clang
3150         _ident=$($_cc --version 2>/dev/null | head -n1)
3151         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3152         _cflags_speed='-O3'
3153         _cflags_size='-Os'
3154     elif $_cc -V 2>&1 | grep -q Sun; then
3155         _type=suncc
3156         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3157         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3158         _DEPFLAGS='-xM1 -xc99'
3159         _ldflags='-std=c99'
3160         _cflags_speed='-O5'
3161         _cflags_size='-O5 -xspace'
3162         _flags_filter=suncc_flags
3163     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3164         _type=pathscale
3165         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3166         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3167         _cflags_speed='-O2'
3168         _cflags_size='-Os'
3169         _flags_filter='filter_out -Wdisabled-optimization'
3170     elif $_cc -v 2>&1 | grep -q Open64; then
3171         _type=open64
3172         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3173         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3174         _cflags_speed='-O2'
3175         _cflags_size='-Os'
3176         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3177     elif $_cc -V 2>&1 | grep -q Portland; then
3178         _type=pgi
3179         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3180         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3181         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3182         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3183         _cflags_noopt="-O1"
3184         _flags_filter=pgi_flags
3185     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3186         _type=armasm
3187         _ident=$($_cc | head -n1)
3188         # 4509: "This form of conditional instruction is deprecated"
3189         _flags="-nologo -ignore 4509"
3190         _flags_filter=armasm_flags
3191     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3192         _type=msvc
3193         _ident=$($_cc 2>&1 | head -n1)
3194         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3195         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3196         _cflags_speed="-O2"
3197         _cflags_size="-O1"
3198         if $_cc -nologo- 2>&1 | grep -q Linker; then
3199             _ld_o='-out:$@'
3200         else
3201             _ld_o='-Fe$@'
3202         fi
3203         _cc_o='-Fo$@'
3204         _cc_e='-P -Fi$@'
3205         _flags_filter=msvc_flags
3206         _ld_lib='lib%.a'
3207         _ld_path='-libpath:'
3208         _flags='-nologo'
3209         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3210     elif $_cc 2>&1 | grep -q Intel; then
3211         _type=icl
3212         _ident=$($_cc 2>&1 | head -n1)
3213         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3214         # Not only is O3 broken on 13.x+ but it is slower on all previous
3215         # versions (tested) as well.
3216         _cflags_speed="-O2"
3217         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3218         if $_cc 2>&1 | grep -q Linker; then
3219             _ld_o='-out:$@'
3220         else
3221             _ld_o='-Fe$@'
3222         fi
3223         _cc_o='-Fo$@'
3224         _cc_e='-P'
3225         _flags_filter=icl_flags
3226         _ld_lib='lib%.a'
3227         _ld_path='-libpath:'
3228         # -Qdiag-error to make icl error when seeing certain unknown arguments
3229         _flags='-nologo -Qdiag-error:4044,10157'
3230         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3231         # with MSVC which enables it by default.
3232         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3233     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3234         _type=cparser
3235         _ident=$($_cc --version | head -n1)
3236         _depflags='-MMD'
3237         _cflags_speed='-O4'
3238         _cflags_size='-O2'
3239         _flags_filter=cparser_flags
3240     fi
3241
3242     eval ${pfx}_type=\$_type
3243     eval ${pfx}_ident=\$_ident
3244 }
3245
3246 set_ccvars(){
3247     eval ${1}_C=\${_cc_c-\${${1}_C}}
3248     eval ${1}_E=\${_cc_e-\${${1}_E}}
3249     eval ${1}_O=\${_cc_o-\${${1}_O}}
3250
3251     if [ -n "$_depflags" ]; then
3252         eval ${1}_DEPFLAGS=\$_depflags
3253     else
3254         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3255         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3256         eval DEP${1}FLAGS=\$_flags
3257     fi
3258 }
3259
3260 probe_cc cc "$cc"
3261 cflags_filter=$_flags_filter
3262 cflags_speed=$_cflags_speed
3263 cflags_size=$_cflags_size
3264 cflags_noopt=$_cflags_noopt
3265 add_cflags $_flags $_cflags
3266 cc_ldflags=$_ldflags
3267 set_ccvars CC
3268
3269 probe_cc hostcc "$host_cc"
3270 host_cflags_filter=$_flags_filter
3271 add_host_cflags  $_flags $_cflags
3272 set_ccvars HOSTCC
3273
3274 test -n "$cc_type" && enable $cc_type ||
3275     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3276
3277 : ${as_default:=$cc}
3278 : ${objcc_default:=$cc}
3279 : ${dep_cc_default:=$cc}
3280 : ${ld_default:=$cc}
3281 : ${host_ld_default:=$host_cc}
3282 set_default ar as objcc dep_cc ld host_ld
3283
3284 probe_cc as "$as"
3285 asflags_filter=$_flags_filter
3286 add_asflags $_flags $_cflags
3287 set_ccvars AS
3288
3289 probe_cc objcc "$objcc"
3290 objcflags_filter=$_flags_filter
3291 add_objcflags $_flags $_cflags
3292 set_ccvars OBJC
3293
3294 probe_cc ld "$ld"
3295 ldflags_filter=$_flags_filter
3296 add_ldflags $_flags $_ldflags
3297 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3298 LD_O=${_ld_o-$LD_O}
3299 LD_LIB=${_ld_lib-$LD_LIB}
3300 LD_PATH=${_ld_path-$LD_PATH}
3301
3302 probe_cc hostld "$host_ld"
3303 host_ldflags_filter=$_flags_filter
3304 add_host_ldflags $_flags $_ldflags
3305 HOSTLD_O=${_ld_o-$HOSTLD_O}
3306
3307 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3308     probe_cc depcc "$dep_cc"
3309     CCDEP=${_DEPCMD:-$DEPCMD}
3310     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3311     DEPCCFLAGS=$_flags
3312 fi
3313
3314 if $ar 2>&1 | grep -q Microsoft; then
3315     arflags="-nologo"
3316     ar_o='-out:$@'
3317 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3318     arflags="rq"
3319     ar_o='$@'
3320 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3321     arflags='-Xany -r -c'
3322     ar_o='$@'
3323 else
3324     arflags="rc"
3325     ar_o='$@'
3326 fi
3327
3328 add_cflags $extra_cflags
3329 add_objcflags $extra_objcflags
3330 add_asflags $extra_cflags
3331
3332 if test -n "$sysroot"; then
3333     case "$cc_type" in
3334         gcc|llvm_gcc|clang)
3335             add_cppflags --sysroot="$sysroot"
3336             add_ldflags --sysroot="$sysroot"
3337         ;;
3338         tms470)
3339             add_cppflags -I"$sysinclude"
3340             add_ldflags  --sysroot="$sysroot"
3341         ;;
3342     esac
3343 fi
3344
3345 if test "$cpu" = host; then
3346     enabled cross_compile &&
3347         die "--cpu=host makes no sense when cross-compiling."
3348
3349     case "$cc_type" in
3350         gcc|llvm_gcc)
3351             check_native(){
3352                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3353                 sed -n "/cc1.*$1=/{
3354                             s/.*$1=\\([^ ]*\\).*/\\1/
3355                             p
3356                             q
3357                         }" $TMPE
3358             }
3359             cpu=$(check_native -march || check_native -mcpu)
3360         ;;
3361     esac
3362
3363     test "${cpu:-host}" = host &&
3364         die "--cpu=host not supported with compiler $cc"
3365 fi
3366
3367 # Deal with common $arch aliases
3368 case "$arch" in
3369     aarch64|arm64)
3370         arch="aarch64"
3371     ;;
3372     arm*)
3373         arch="arm"
3374     ;;
3375     mips*|IP*)
3376         case "$arch" in
3377         *el)
3378             add_cppflags -EL
3379             add_ldflags -EL
3380         ;;
3381         *eb)
3382             add_cppflags -EB
3383             add_ldflags -EB
3384         ;;
3385         esac
3386         arch="mips"
3387     ;;
3388     parisc*|hppa*)
3389         arch="parisc"
3390     ;;
3391     "Power Macintosh"|ppc*|powerpc*)
3392         arch="ppc"
3393     ;;
3394     s390|s390x)
3395         arch="s390"
3396     ;;
3397     sh4|sh)
3398         arch="sh4"
3399     ;;
3400     sun4u|sparc*)
3401         arch="sparc"
3402     ;;
3403     tilegx|tile-gx)
3404         arch="tilegx"
3405     ;;
3406     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3407         arch="x86"
3408     ;;
3409 esac
3410
3411 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3412 enable $arch
3413
3414 # Add processor-specific flags
3415 if enabled aarch64; then
3416
3417     case $cpu in
3418         armv*)
3419             cpuflags="-march=$cpu"
3420         ;;
3421         *)
3422             cpuflags="-mcpu=$cpu"
3423         ;;
3424     esac
3425
3426 elif enabled alpha; then
3427
3428     cpuflags="-mcpu=$cpu"
3429
3430 elif enabled arm; then
3431
3432     check_arm_arch() {
3433         check_cpp_condition stddef.h \
3434             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3435             $cpuflags
3436     }
3437
3438     probe_arm_arch() {
3439         if   check_arm_arch 4;        then echo armv4;
3440         elif check_arm_arch 4T;       then echo armv4t;
3441         elif check_arm_arch 5;        then echo armv5;
3442         elif check_arm_arch 5E;       then echo armv5e;
3443         elif check_arm_arch 5T;       then echo armv5t;
3444         elif check_arm_arch 5TE;      then echo armv5te;
3445         elif check_arm_arch 5TEJ;     then echo armv5te;
3446         elif check_arm_arch 6;        then echo armv6;
3447         elif check_arm_arch 6J;       then echo armv6j;
3448         elif check_arm_arch 6K;       then echo armv6k;
3449         elif check_arm_arch 6Z;       then echo armv6z;
3450         elif check_arm_arch 6ZK;      then echo armv6zk;
3451         elif check_arm_arch 6T2;      then echo armv6t2;
3452         elif check_arm_arch 7;        then echo armv7;
3453         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3454         elif check_arm_arch 7S;       then echo armv7-a;
3455         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3456         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3457         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3458         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3459         fi
3460     }
3461
3462     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3463
3464     case $cpu in
3465         armv*)
3466             cpuflags="-march=$cpu"
3467             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3468         ;;
3469         *)
3470             cpuflags="-mcpu=$cpu"
3471             case $cpu in
3472                 cortex-a*)                               subarch=armv7a  ;;
3473                 cortex-r*)                               subarch=armv7r  ;;
3474                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3475                 arm11*)                                  subarch=armv6   ;;
3476                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3477                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3478                 *)                             subarch=$(probe_arm_arch) ;;
3479             esac
3480         ;;
3481     esac
3482
3483     case "$subarch" in
3484         armv5t*)    enable fast_clz                ;;
3485         armv[6-8]*) enable fast_clz fast_unaligned ;;
3486     esac
3487
3488 elif enabled avr32; then
3489
3490     case $cpu in
3491         ap7[02]0[0-2])
3492             subarch="avr32_ap"
3493             cpuflags="-mpart=$cpu"
3494         ;;
3495         ap)
3496             subarch="avr32_ap"
3497             cpuflags="-march=$cpu"
3498         ;;
3499         uc3[ab]*)
3500             subarch="avr32_uc"
3501             cpuflags="-mcpu=$cpu"
3502         ;;
3503         uc)
3504             subarch="avr32_uc"
3505             cpuflags="-march=$cpu"
3506         ;;
3507     esac
3508
3509 elif enabled bfin; then
3510
3511     cpuflags="-mcpu=$cpu"
3512
3513 elif enabled mips; then
3514
3515     cpuflags="-march=$cpu"
3516
3517 elif enabled ppc; then
3518
3519     disable ldbrx
3520
3521     case $(tolower $cpu) in
3522         601|ppc601|powerpc601)
3523             cpuflags="-mcpu=601"
3524             disable altivec
3525         ;;
3526         603*|ppc603*|powerpc603*)
3527             cpuflags="-mcpu=603"
3528             disable altivec
3529         ;;
3530         604*|ppc604*|powerpc604*)
3531             cpuflags="-mcpu=604"
3532             disable altivec
3533         ;;
3534         g3|75*|ppc75*|powerpc75*)
3535             cpuflags="-mcpu=750"
3536             disable altivec
3537         ;;
3538         g4|745*|ppc745*|powerpc745*)
3539             cpuflags="-mcpu=7450"
3540             disable vsx
3541         ;;
3542         74*|ppc74*|powerpc74*)
3543             cpuflags="-mcpu=7400"
3544             disable vsx
3545         ;;
3546         g5|970|ppc970|powerpc970)
3547             cpuflags="-mcpu=970"
3548             disable vsx
3549         ;;
3550         power[3-6]*)
3551             cpuflags="-mcpu=$cpu"
3552             disable vsx
3553         ;;
3554         power[7-8]*)
3555             cpuflags="-mcpu=$cpu"
3556             enable ldbrx
3557         ;;
3558         cell)
3559             cpuflags="-mcpu=cell"
3560             enable ldbrx
3561             disable vsx
3562         ;;
3563         e500mc)
3564             cpuflags="-mcpu=e500mc"
3565             disable altivec
3566         ;;
3567         e500v2)
3568             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3569             disable altivec
3570             disable dcbzl
3571         ;;
3572         e500)
3573             cpuflags="-mcpu=8540 -mhard-float"
3574             disable altivec
3575             disable dcbzl
3576         ;;
3577     esac
3578
3579 elif enabled sparc; then
3580
3581     case $cpu in
3582         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3583             cpuflags="-mcpu=$cpu"
3584         ;;
3585         ultrasparc*|niagara[234])
3586             cpuflags="-mcpu=$cpu"
3587         ;;
3588     esac
3589
3590 elif enabled x86; then
3591
3592     case $cpu in
3593         i[345]86|pentium)
3594             cpuflags="-march=$cpu"
3595             disable i686
3596             disable mmx
3597         ;;
3598         # targets that do NOT support nopl and conditional mov (cmov)
3599         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3600             cpuflags="-march=$cpu"
3601             disable i686
3602         ;;
3603         # targets that do support nopl and conditional mov (cmov)
3604         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3605             cpuflags="-march=$cpu"
3606             enable i686
3607             enable fast_cmov
3608         ;;
3609         # targets that do support conditional mov but on which it's slow
3610         pentium4|pentium4m|prescott|nocona)
3611             cpuflags="-march=$cpu"
3612             enable i686
3613             disable fast_cmov
3614         ;;
3615     esac
3616
3617 fi
3618
3619 if [ "$cpu" != generic ]; then
3620     add_cflags  $cpuflags
3621     add_asflags $cpuflags
3622     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3623 fi
3624
3625 # compiler sanity check
3626 check_exec <<EOF
3627 int main(void){ return 0; }
3628 EOF
3629 if test "$?" != 0; then
3630     echo "$cc is unable to create an executable file."
3631     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3632         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3633         echo "Only do this if you know what cross compiling means."
3634     fi
3635     die "C compiler test failed."
3636 fi
3637
3638 add_cppflags -D_ISOC99_SOURCE
3639 check_cflags -std=c99
3640 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3641 #include <stdlib.h>
3642 EOF
3643 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3644 #include <stdlib.h>
3645 EOF
3646
3647 add_host_cppflags -D_ISOC99_SOURCE
3648 check_host_cflags -std=c99
3649 check_host_cflags -Wall
3650 check_host_cflags -O3
3651
3652 check_64bit(){
3653     arch32=$1
3654     arch64=$2
3655     expr=$3
3656     check_code cc "" "int test[2*($expr) - 1]" &&
3657         subarch=$arch64 || subarch=$arch32
3658 }
3659
3660 case "$arch" in
3661     aarch64|alpha|ia64)
3662         spic=$shared
3663     ;;
3664     mips)
3665         check_64bit mips mips64 '_MIPS_SIM > 1'
3666         spic=$shared
3667     ;;
3668     parisc)
3669         check_64bit parisc parisc64 'sizeof(void *) > 4'
3670         spic=$shared
3671     ;;
3672     ppc)
3673         check_64bit ppc ppc64 'sizeof(void *) > 4'
3674         spic=$shared
3675     ;;
3676     s390)
3677         check_64bit s390 s390x 'sizeof(void *) > 4'
3678         spic=$shared
3679     ;;
3680     sparc)
3681         check_64bit sparc sparc64 'sizeof(void *) > 4'
3682         spic=$shared
3683     ;;
3684     x86)
3685         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3686         if test "$subarch" = "x86_64"; then
3687             spic=$shared
3688         fi
3689     ;;
3690 esac
3691
3692 enable $subarch
3693 enabled spic && enable_weak pic
3694
3695 # OS specific
3696 case $target_os in
3697     aix)
3698         SHFLAGS=-shared
3699         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3700         enabled shared && add_ldflags -Wl,-brtl
3701         ;;
3702     android)
3703         disable symver
3704         enable section_data_rel_ro
3705         SLIB_INSTALL_NAME='$(SLIBNAME)'
3706         SLIB_INSTALL_LINKS=
3707         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3708         ;;
3709     haiku)
3710         prefix_default="/boot/common"
3711         network_extralibs="-lnetwork"
3712         host_libs=
3713         ;;
3714     sunos)
3715         SHFLAGS='-shared -Wl,-h,$$(@F)'
3716         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3717         network_extralibs="-lsocket -lnsl"
3718         # When using suncc to build, the Solaris linker will mark
3719         # an executable with each instruction set encountered by
3720         # the Solaris assembler.  As our libraries contain their own
3721         # guards for processor-specific code, instead suppress
3722         # generation of the HWCAPS ELF section on Solaris x86 only.
3723         enabled_all suncc x86 &&
3724             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3725             add_ldflags -Wl,-M,mapfile
3726         nm_default='nm -P -g'
3727         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3728         ;;
3729     netbsd)
3730         disable symver
3731         oss_indev_extralibs="-lossaudio"
3732         oss_outdev_extralibs="-lossaudio"
3733         ;;
3734     openbsd|bitrig)
3735         disable symver
3736         SHFLAGS='-shared'
3737         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3738         SLIB_INSTALL_LINKS=
3739         oss_indev_extralibs="-lossaudio"
3740         oss_outdev_extralibs="-lossaudio"
3741         ;;
3742     dragonfly)
3743         disable symver
3744         ;;
3745     freebsd)
3746         ;;
3747     bsd/os)
3748         add_extralibs -lpoll -lgnugetopt
3749         ;;
3750     darwin)
3751         enabled ppc && add_asflags -force_cpusubtype_ALL
3752         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3753         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3754         add_ldflags -Wl,-dynamic,-search_paths_first
3755         SLIBSUF=".dylib"
3756         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3757         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3758         objformat="macho"
3759         enabled x86_64 && objformat="macho64"
3760         enabled_any pic shared ||
3761             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3762         ;;
3763     msys*)
3764         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3765         ;;
3766     mingw32*|mingw64*)
3767         if test $target_os = "mingw32ce"; then
3768             disable network
3769         else
3770             target_os=mingw32
3771         fi
3772         LIBTARGET=i386
3773         if enabled x86_64; then
3774             LIBTARGET="i386:x86-64"
3775         elif enabled arm; then
3776             LIBTARGET=arm-wince
3777         fi
3778         check_ldflags -Wl,--nxcompat
3779         check_ldflags -Wl,--dynamicbase
3780         shlibdir_default="$bindir_default"
3781         SLIBPREF=""
3782         SLIBSUF=".dll"
3783         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3784         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3785         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3786         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3787         SLIB_INSTALL_LINKS=
3788         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3789         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3790         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3791         objformat="win32"
3792         dlltool="${cross_prefix}dlltool"
3793         ranlib=:
3794         enable dos_paths
3795         ;;
3796     win32|win64)
3797         disable symver
3798         if enabled shared; then
3799             # Link to the import library instead of the normal static library
3800             # for shared libs.
3801             LD_LIB='%.lib'
3802             # Cannot build both shared and static libs with MSVC or icl.
3803             disable static
3804         fi
3805         shlibdir_default="$bindir_default"
3806         SLIBPREF=""
3807         SLIBSUF=".dll"
3808         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3809         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3810         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3811         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3812         SLIB_INSTALL_LINKS=
3813         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3814         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3815         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3816         objformat="win32"
3817         ranlib=:
3818         enable dos_paths
3819         ;;
3820     cygwin*)
3821         target_os=cygwin
3822         shlibdir_default="$bindir_default"
3823         SLIBPREF="cyg"
3824         SLIBSUF=".dll"
3825         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3826         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3827         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3828         SLIB_INSTALL_LINKS=
3829         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3830         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3831         objformat="win32"
3832         enable dos_paths
3833         ;;
3834     *-dos|freedos|opendos)
3835         network_extralibs="-lsocket"
3836         objformat="coff"
3837         enable dos_paths
3838         add_cppflags -U__STRICT_ANSI__
3839         ;;
3840     linux)
3841         enable dv1394
3842         enable section_data_rel_ro
3843         ;;
3844     irix*)
3845         target_os=irix
3846         ranlib="echo ignoring ranlib"
3847         ;;
3848     os/2*)
3849         ln_s="cp -f"
3850         objformat="aout"
3851         add_cppflags -D_GNU_SOURCE
3852         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3853         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3854         LIBSUF="_s.a"
3855         SLIBPREF=""
3856         SLIBSUF=".dll"
3857         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3858         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3859         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3860             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3861             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3862             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3863             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3864         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3865             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3866         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3867         enable dos_paths
3868         ;;
3869     gnu/kfreebsd)
3870         add_cppflags -D_BSD_SOURCE
3871         ;;
3872     gnu)
3873         ;;
3874     qnx)
3875         add_cppflags -D_QNX_SOURCE
3876         network_extralibs="-lsocket"
3877         ;;
3878     symbian)
3879         SLIBSUF=".dll"
3880         enable dos_paths
3881         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3882         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3883         add_ldflags -Wl,--target1-abs,--no-undefined \
3884                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3885                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3886         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3887                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3888                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3889         ;;
3890     osf1)
3891         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3892         ;;
3893     minix)
3894         ;;
3895     plan9)
3896         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3897                      -D_REENTRANT_SOURCE        \
3898                      -D_RESEARCH_SOURCE         \
3899                      -DFD_SETSIZE=96            \
3900                      -DHAVE_SOCK_OPTS
3901         add_compat strtod.o strtod=avpriv_strtod
3902         network_extralibs='-lbsd'
3903         exeobjs=compat/plan9/main.o
3904         cp_f='cp'
3905         ;;
3906     none)
3907         ;;
3908     *)
3909         die "Unknown OS '$target_os'."
3910         ;;
3911 esac
3912
3913 # determine libc flavour
3914
3915 probe_libc(){
3916     pfx=$1
3917     pfx_no_=${pfx%_}
3918     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3919     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3920         eval ${pfx}libc_type=uclibc
3921         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3922     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3923         eval ${pfx}libc_type=glibc
3924         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3925     # MinGW headers can be installed on Cygwin, so check for newlib first.
3926     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3927         eval ${pfx}libc_type=newlib
3928         add_${pfx}cppflags -U__STRICT_ANSI__
3929     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3930     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3931         eval ${pfx}libc_type=mingw64
3932         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3933         eval test \$${pfx_no_}cc_type = "gcc" &&
3934             add_${pfx}cppflags -D__printf__=__gnu_printf__
3935     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3936          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3937         eval ${pfx}libc_type=mingw32
3938         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3939             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3940             die "ERROR: MinGW32 runtime version must be >= 3.15."
3941         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3942         eval test \$${pfx_no_}cc_type = "gcc" &&
3943             add_${pfx}cppflags -D__printf__=__gnu_printf__
3944     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3945         eval ${pfx}libc_type=msvcrt
3946         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3947             if [ "$pfx" = host_ ]; then
3948                 add_host_cppflags -Dsnprintf=_snprintf
3949             else
3950                 add_compat strtod.o strtod=avpriv_strtod
3951                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3952                                              _snprintf=avpriv_snprintf  \
3953                                              vsnprintf=avpriv_vsnprintf
3954             fi
3955         fi
3956         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3957         # 0x601 by default unless something else is set by the user.
3958         # This can easily lead to us detecting functions only present
3959         # in such new versions and producing binaries requiring windows 7.0.
3960         # Therefore explicitly set the default to XP unless the user has
3961         # set something else on the command line.
3962         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3963         # family. For these cases, configure is free to use any functions
3964         # found in the SDK headers by default. (Alternatively, we could force
3965         # _WIN32_WINNT to 0x0602 in that case.)
3966         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3967             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3968 #ifdef WINAPI_FAMILY
3969 #include <winapifamily.h>
3970 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3971 #error not desktop
3972 #endif
3973 #endif
3974 EOF
3975     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3976         eval ${pfx}libc_type=klibc
3977     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3978         eval ${pfx}libc_type=bionic
3979     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3980         eval ${pfx}libc_type=solaris
3981         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3982     else
3983         eval ${pfx}libc_type=default
3984         add_${pfx}cppflags -D_DEFAULT_SOURCE
3985     fi
3986 }
3987
3988 probe_libc
3989 test -n "$libc_type" && enable libc_$libc_type
3990 probe_libc host_
3991 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3992
3993 case $libc_type in
3994     bionic)
3995         add_compat strtod.o strtod=avpriv_strtod
3996         ;;
3997 esac
3998
3999 # hacks for compiler/libc/os combinations
4000
4001 if enabled_all tms470 libc_glibc; then
4002     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4003     add_cppflags -D__USER_LABEL_PREFIX__=
4004     add_cppflags -D__builtin_memset=memset
4005     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4006     add_cflags   -pds=48    # incompatible redefinition of macro
4007 fi
4008
4009 if enabled_all ccc libc_glibc; then
4010     add_ldflags -Wl,-z,now  # calls to libots crash without this
4011 fi
4012
4013 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4014     add_cppflags '-I\$(SRC_PATH)/compat/float'
4015
4016 esc(){
4017     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4018 }
4019
4020 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4021
4022 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4023
4024 set_default $PATHS_LIST
4025 set_default nm
4026
4027 # we need to build at least one lib type
4028 if ! enabled_any static shared; then
4029     cat <<EOF
4030 At least one library type must be built.
4031 Specify --enable-static to build the static libraries or --enable-shared to
4032 build the shared libraries as well. To only build the shared libraries specify
4033 --disable-static in addition to --enable-shared.
4034 EOF
4035     exit 1;
4036 fi
4037
4038 die_license_disabled() {
4039     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4040 }
4041
4042 die_license_disabled gpl libcdio
4043 die_license_disabled gpl libx264
4044 die_license_disabled gpl libx265
4045 die_license_disabled gpl libxavs
4046 die_license_disabled gpl libxvid
4047 die_license_disabled gpl x11grab
4048
4049 die_license_disabled nonfree cuda
4050 die_license_disabled nonfree libfaac
4051 die_license_disabled nonfree libfdk_aac
4052 die_license_disabled nonfree nvenc
4053 die_license_disabled nonfree openssl
4054
4055 die_license_disabled version3 libopencore_amrnb
4056 die_license_disabled version3 libopencore_amrwb
4057 die_license_disabled version3 libvo_aacenc
4058 die_license_disabled version3 libvo_amrwbenc
4059
4060 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4061
4062 disabled optimizations || check_cflags -fomit-frame-pointer
4063
4064 enable_weak_pic() {
4065     disabled pic && return
4066     enable pic
4067     add_cppflags -DPIC
4068     case "$target_os" in
4069     mingw*|cygwin*)
4070         ;;
4071     *)
4072         add_cflags -fPIC
4073         ;;
4074     esac
4075     add_asflags  -fPIC
4076 }
4077
4078 enabled pic && enable_weak_pic
4079
4080 check_cc <<EOF || die "Symbol mangling check failed."
4081 int ff_extern;
4082 EOF
4083 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4084 extern_prefix=${sym%%ff_extern*}
4085
4086 check_cc <<EOF && enable_weak inline_asm
4087 void foo(void) { __asm__ volatile ("" ::); }
4088 EOF
4089
4090 _restrict=
4091 for restrict_keyword in restrict __restrict__ __restrict; do
4092     check_cc <<EOF && _restrict=$restrict_keyword && break
4093 void foo(char * $restrict_keyword p);
4094 EOF
4095 done
4096
4097 check_cc <<EOF && enable pragma_deprecated
4098 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4099 EOF
4100
4101 check_cc <<EOF && enable attribute_packed
4102 struct { int x; } __attribute__((packed)) x;
4103 EOF
4104
4105 check_cc <<EOF && enable attribute_may_alias
4106 union { int x; } __attribute__((may_alias)) x;
4107 EOF
4108
4109 check_cc <<EOF || die "endian test failed"
4110 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4111 EOF
4112 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4113
4114 check_gas() {
4115     log "check_gas using '$as' as AS"
4116     # :vararg is used on aarch64, arm and ppc altivec
4117     check_as <<EOF || return 1
4118 .macro m n, y:vararg=0
4119 \n: .int \y
4120 .endm
4121 m x
4122 EOF
4123     # .altmacro is only used in arm asm
4124     ! enabled arm || check_as <<EOF || return 1
4125 .altmacro
4126 EOF
4127     enable gnu_as
4128     return 0
4129 }
4130
4131 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4132     nogas=:
4133     enabled_any arm aarch64 && nogas=die
4134     enabled_all ppc altivec && nogas=warn
4135     as_noop=-v
4136
4137     case $as_type in
4138         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4139         gcc)  gaspp_as_type=gas ;;
4140         *)    gaspp_as_type=$as_type ;;
4141     esac
4142
4143     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4144
4145     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4146         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4147
4148     if ! check_gas ; then
4149         as=${gas:=$as}
4150         check_gas || \
4151             $nogas "GNU assembler not found, install/update gas-preprocessor"
4152     fi
4153
4154     check_as <<EOF && enable as_func
4155 .func test
4156 .endfunc
4157 EOF
4158 fi
4159
4160 check_inline_asm inline_asm_labels '"1:\n"'
4161
4162 if enabled aarch64; then
4163     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4164     # internal assembler in clang 3.3 does not support this instruction
4165     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4166     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4167
4168     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4169
4170 elif enabled alpha; then
4171
4172     check_cflags -mieee
4173
4174 elif enabled arm; then
4175
4176     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4177     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4178     enabled thumb && check_cflags -mthumb || check_cflags -marm
4179
4180     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4181         enable vfp_args
4182     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4183         enable vfp_args
4184     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4185         case "${cross_prefix:-$cc}" in
4186             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4187             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4188 __asm__ (".eabi_attribute 28, 1");
4189 int main(void) { return 0; }
4190 EOF
4191         esac
4192         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4193     fi
4194
4195     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4196     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4197     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4198     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4199     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4200     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4201
4202     [ $target_os = linux ] || [ $target_os = android ] ||
4203         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4204             $ARCH_EXT_LIST_ARM
4205
4206     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4207
4208     check_as <<EOF && enable as_dn_directive
4209 ra .dn d0.i16
4210 .unreq ra
4211 EOF
4212
4213     # llvm's integrated assembler supports .object_arch from llvm 3.5
4214     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4215 .object_arch armv4
4216 EOF
4217
4218     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4219
4220 elif enabled mips; then
4221
4222     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4223
4224     # make sure that only an instruction set is enabled
4225     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4226
4227     if enabled mips64; then
4228         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4229             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4230                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4231     else
4232         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4233             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4234                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4235     fi
4236
4237 elif enabled parisc; then
4238
4239     if enabled gcc; then
4240         case $($cc -dumpversion) in
4241             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4242         esac
4243     fi
4244
4245 elif enabled ppc; then
4246
4247     enable local_aligned_8 local_aligned_16
4248
4249     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4250     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4251     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4252     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4253
4254     # AltiVec flags: The FSF version of GCC differs from the Apple version
4255     if enabled altivec; then
4256         check_cflags -maltivec -mabi=altivec &&
4257         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4258         check_cflags -faltivec
4259
4260         # check if our compiler supports Motorola AltiVec C API
4261         check_cc <<EOF || disable altivec
4262 $inc_altivec_h
4263 int main(void) {
4264     vector signed int v1 = (vector signed int) { 0 };
4265     vector signed int v2 = (vector signed int) { 1 };
4266     v1 = vec_add(v1, v2);
4267     return 0;
4268 }
4269 EOF
4270
4271         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4272     fi
4273
4274     if enabled vsx; then
4275         check_cflags -mvsx &&
4276         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4277     fi
4278
4279     if enabled power8; then
4280         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4281     fi
4282
4283 elif enabled x86; then
4284
4285     check_builtin rdtsc    intrin.h   "__rdtsc()"
4286     check_builtin mm_empty mmintrin.h "_mm_empty()"
4287
4288     enable local_aligned_8 local_aligned_16
4289
4290     # check whether EBP is available on x86
4291     # As 'i' is stored on the stack, this program will crash
4292     # if the base pointer is used to access it because the
4293     # base pointer is cleared in the inline assembly code.
4294     check_exec_crash <<EOF && enable ebp_available
4295 volatile int i=0;
4296 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4297 return i;
4298 EOF
4299
4300     # check whether EBX is available on x86
4301     check_inline_asm ebx_available '""::"b"(0)' &&
4302         check_inline_asm ebx_available '"":::"%ebx"'
4303
4304     # check whether xmm clobbers are supported
4305     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4306
4307     # check whether binutils is new enough to compile SSSE3/MMXEXT
4308     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4309     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4310
4311     if ! disabled_any asm mmx yasm; then
4312         if check_cmd $yasmexe --version; then
4313             enabled x86_64 && yasm_extra="-m amd64"
4314             yasm_debug="-g dwarf2"
4315         elif check_cmd nasm -v; then
4316             yasmexe=nasm
4317             yasm_debug="-g -F dwarf"
4318             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4319         fi
4320
4321         YASMFLAGS="-f $objformat $yasm_extra"
4322         enabled pic               && append YASMFLAGS "-DPIC"
4323         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4324         case "$objformat" in
4325             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4326         esac
4327
4328         check_yasm "movbe ecx, [5]" && enable yasm ||
4329             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4330         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4331         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4332         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4333         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4334         check_yasm "CPU amdnop" || disable cpunop
4335     fi
4336
4337     case "$cpu" in
4338         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4339             disable fast_clz
4340         ;;
4341     esac
4342
4343 fi
4344
4345 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4346
4347 check_ldflags -Wl,--as-needed
4348
4349 if check_func dlopen; then
4350     ldl=
4351 elif check_func dlopen -ldl; then
4352     ldl=-ldl
4353 fi
4354
4355 if ! disabled network; then
4356     check_func getaddrinfo $network_extralibs
4357     check_func inet_aton $network_extralibs
4358
4359     check_type netdb.h "struct addrinfo"
4360     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4361     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4362     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4363     check_type poll.h "struct pollfd"
4364     check_type netinet/sctp.h "struct sctp_event_subscribe"
4365     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4366     check_type netinet/in.h "struct sockaddr_in6"
4367     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4368     check_type "sys/types.h sys/socket.h" socklen_t
4369
4370     # Prefer arpa/inet.h over winsock2
4371     if check_header arpa/inet.h ; then
4372         check_func closesocket
4373     elif check_header winsock2.h ; then
4374         check_func_headers winsock2.h closesocket -lws2 &&
4375             network_extralibs="-lws2" ||
4376         { check_func_headers winsock2.h closesocket -lws2_32 &&
4377             network_extralibs="-lws2_32"; } || disable winsock2_h network
4378         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4379
4380         check_type ws2tcpip.h socklen_t
4381         check_type ws2tcpip.h "struct addrinfo"
4382         check_type ws2tcpip.h "struct group_source_req"
4383         check_type ws2tcpip.h "struct ip_mreq_source"
4384         check_type ws2tcpip.h "struct ipv6_mreq"
4385         check_type winsock2.h "struct pollfd"
4386         check_struct winsock2.h "struct sockaddr" sa_len
4387         check_type ws2tcpip.h "struct sockaddr_in6"
4388         check_type ws2tcpip.h "struct sockaddr_storage"
4389     else
4390         disable network
4391     fi
4392 fi
4393
4394 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4395 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4396 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4397 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4398
4399 case "$custom_allocator" in
4400     jemalloc)
4401         # jemalloc by default does not use a prefix
4402         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4403     ;;
4404     tcmalloc)
4405         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4406         malloc_prefix=tc_
4407     ;;
4408 esac
4409
4410 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4411 check_func  ${malloc_prefix}memalign            && enable memalign
4412 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4413
4414 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4415     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4416
4417 check_func  fcntl
4418 check_func  fork
4419 check_func  gethrtime
4420 check_func  getopt
4421 check_func  getrusage
4422 check_func  gettimeofday
4423 check_func  gmtime_r
4424 check_func  isatty
4425 check_func  localtime_r
4426 check_func  mach_absolute_time
4427 check_func  mkstemp
4428 check_func  mmap
4429 check_func  mprotect
4430 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4431 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4432 check_func  sched_getaffinity
4433 check_func  setrlimit
4434 check_func  strerror_r
4435 check_func  sysconf
4436 check_func  sysctl
4437 check_func  usleep
4438
4439 check_func_headers io.h setmode
4440 check_func_headers stdlib.h getenv
4441
4442 check_func_headers windows.h CoTaskMemFree -lole32
4443 check_func_headers windows.h GetProcessAffinityMask
4444 check_func_headers windows.h GetProcessTimes
4445 check_func_headers windows.h GetSystemTimeAsFileTime
4446 check_func_headers windows.h LoadLibrary
4447 check_func_headers windows.h MapViewOfFile
4448 check_func_headers windows.h SetConsoleTextAttribute
4449 check_func_headers windows.h Sleep
4450 check_func_headers windows.h VirtualAlloc
4451 check_struct windows.h "CONDITION_VARIABLE" Ptr
4452
4453 check_header direct.h
4454 check_header dlfcn.h
4455 check_header d3d11.h
4456 check_header dxva.h
4457 check_header dxva2api.h
4458 check_header io.h
4459 check_header mach/mach_time.h
4460 check_header malloc.h
4461 check_header poll.h
4462 check_header sys/mman.h
4463 check_header sys/param.h
4464 check_header sys/resource.h
4465 check_header sys/select.h
4466 check_header sys/time.h
4467 check_header sys/un.h
4468 check_header unistd.h
4469 check_header valgrind/valgrind.h
4470 check_header vdpau/vdpau.h
4471 check_header vdpau/vdpau_x11.h
4472 check_header VideoDecodeAcceleration/VDADecoder.h
4473 check_header windows.h
4474 check_header X11/extensions/XvMClib.h
4475
4476 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4477 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4478 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4479
4480 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4481
4482 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4483 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4484 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4485
4486 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4487
4488 if ! disabled w32threads && ! enabled pthreads; then
4489     check_func_headers "windows.h process.h" _beginthreadex &&
4490         enable w32threads || disable w32threads
4491 fi
4492
4493 # check for some common methods of building with pthread support
4494 # do this before the optional library checks as some of them require pthreads
4495 if ! disabled pthreads && ! enabled w32threads; then
4496     enable pthreads
4497     if check_func pthread_join -pthread; then
4498         add_cflags -pthread
4499         add_extralibs -pthread
4500     elif check_func pthread_join -pthreads; then
4501         add_cflags -pthreads
4502         add_extralibs -pthreads
4503     elif check_func pthread_join -lpthreadGC2; then
4504         add_extralibs -lpthreadGC2
4505     elif check_lib pthread.h pthread_join -lpthread; then
4506         :
4507     elif ! check_func pthread_join; then
4508         disable pthreads
4509     fi
4510 fi
4511
4512 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4513 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4514
4515 check_lib math.h sin -lm && LIBM="-lm"
4516 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4517
4518 atan2f_args=2
4519 ldexpf_args=2
4520 powf_args=2
4521
4522 for func in $MATH_FUNCS; do
4523     eval check_mathfunc $func \${${func}_args:-1}
4524 done
4525
4526 # these are off by default, so fail if requested and not available
4527 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4528                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4529                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4530 enabled cuda              && check_lib cuda.h cuInit -lcuda
4531 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4532 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4533 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4534 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4535 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4536 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4537 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4538 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4539 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4540                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4541                                done || die "ERROR: libgsm not found"; }
4542 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4543 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4544 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4545 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4546 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4547 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4548 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4549 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4550 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4551                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4552 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4553 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4554 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4555 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4556 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4557 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4558 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4559 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4560 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4561 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4562 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4563 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4564     enabled libvpx_vp8_decoder && {
4565         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4566             disable libvpx_vp8_decoder;
4567     }
4568     enabled libvpx_vp8_encoder && {
4569         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4570             disable libvpx_vp8_encoder;
4571     }
4572     enabled libvpx_vp9_decoder && {
4573         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4574             disable libvpx_vp9_decoder;
4575     }
4576     enabled libvpx_vp9_encoder && {
4577         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4578             disable libvpx_vp9_encoder;
4579     }
4580     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4581         die "libvpx enabled but no supported decoders found"
4582     fi
4583 }
4584 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4585 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4586 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4587                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4588                                die "ERROR: libx264 version must be >= 0.118."; } &&
4589                              { check_cpp_condition x264.h "X264_MPEG2" &&
4590                                enable libx262; }
4591 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4592                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4593                                die "ERROR: libx265 version must be >= 57."; }
4594 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4595 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4596 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4597                                 { ! enabled cross_compile && {
4598                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4599                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4600                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4601                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4602                                die "ERROR: mmal not found"; }
4603 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4604                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4605                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4606                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4607                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4608                                die "ERROR: openssl not found"; }
4609
4610 if enabled gnutls; then
4611     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4612     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4613 fi
4614
4615 # libdc1394 check
4616 if enabled libdc1394; then
4617     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4618         enable libdc1394_2; } ||
4619     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4620         enable libdc1394_1; } ||
4621     die "ERROR: No version of libdc1394 found "
4622 fi
4623
4624 if enabled nvenc; then
4625     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found.";
4626     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4627     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4628         die "ERROR: NVENC API version 4 or older is not supported";
4629 fi
4630
4631 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4632     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4633     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4634     enable sdl
4635 fi
4636
4637 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4638 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4639
4640 check_header linux/fb.h
4641 check_header linux/videodev2.h
4642 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4643
4644 check_header AVFoundation/AVFoundation.h &&
4645     check_objcflags -fobjc-arc &&
4646     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4647     disable AVFoundation_AVFoundation_h
4648
4649 check_header sys/videoio.h
4650
4651 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4652 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4653 # w32api 3.12 had it defined wrong
4654 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4655
4656 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4657 { check_header dev/bktr/ioctl_meteor.h &&
4658   check_header dev/bktr/ioctl_bt848.h; } ||
4659 { check_header machine/ioctl_meteor.h &&
4660   check_header machine/ioctl_bt848.h; } ||
4661 { check_header dev/video/meteor/ioctl_meteor.h &&
4662   check_header dev/video/bktr/ioctl_bt848.h; } ||
4663 check_header dev/ic/bt8xx.h
4664
4665 check_header sndio.h
4666 check_header sys/soundcard.h
4667 check_header soundcard.h
4668
4669 enabled_any alsa_indev alsa_outdev &&
4670     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4671
4672 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4673     check_func jack_port_get_latency_range -ljack
4674
4675 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4676
4677 if enabled libcdio; then
4678     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4679     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4680     die "ERROR: No usable libcdio/cdparanoia found"
4681 fi
4682
4683 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4684
4685 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4686     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4687         enabled libxcb && die "ERROR: libxcb not found";
4688     } && disable x11grab && enable libxcb
4689
4690     disabled libxcb_shm ||
4691         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4692             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4693         } && check_header sys/shm.h && enable libxcb_shm
4694
4695     disabled libxcb_xfixes ||
4696         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4697             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4698         } && enable libxcb_xfixes
4699
4700     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4701     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4702 fi
4703
4704 if enabled x11grab; then
4705     enabled xlib || die "ERROR: Xlib not found"
4706     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4707     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4708 fi
4709
4710 enabled vaapi && enabled xlib &&
4711     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4712     enable vaapi_x11
4713
4714 enabled vdpau &&
4715     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4716     disable vdpau
4717
4718 enabled vdpau && enabled xlib &&
4719     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4720     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4721     enable vdpau_x11
4722
4723 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4724
4725 # add some useful compiler flags if supported
4726 check_cflags -Wdeclaration-after-statement
4727 check_cflags -Wall
4728 check_cflags -Wdisabled-optimization
4729 check_cflags -Wpointer-arith
4730 check_cflags -Wredundant-decls
4731 check_cflags -Wwrite-strings
4732 check_cflags -Wtype-limits
4733 check_cflags -Wundef
4734 check_cflags -Wmissing-prototypes
4735 check_cflags -Wstrict-prototypes
4736 enabled extra_warnings && check_cflags -Winline
4737 enabled extra_warnings && check_cflags -Wcast-qual
4738
4739 check_disable_warning(){
4740     warning_flag=-W${1#-Wno-}
4741     test_cflags $warning_flag && add_cflags $1
4742 }
4743
4744 check_disable_warning -Wno-parentheses
4745 check_disable_warning -Wno-switch
4746 check_disable_warning -Wno-format-zero-length
4747 check_disable_warning -Wno-pointer-sign
4748
4749 # add some linker flags
4750 check_ldflags -Wl,--warn-common
4751 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4752 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4753 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4754
4755 # add some strip flags
4756 # -wN '..@*' is more selective than -x, but not available everywhere.
4757 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4758
4759 enabled neon_clobber_test &&
4760     check_ldflags -Wl,--wrap,avcodec_open2              \
4761                   -Wl,--wrap,avcodec_decode_audio4      \
4762                   -Wl,--wrap,avcodec_decode_video2      \
4763                   -Wl,--wrap,avcodec_decode_subtitle2   \
4764                   -Wl,--wrap,avcodec_encode_audio2      \
4765                   -Wl,--wrap,avcodec_encode_video2      \
4766                   -Wl,--wrap,avcodec_encode_subtitle    \
4767                   -Wl,--wrap,avresample_convert ||
4768     disable neon_clobber_test
4769
4770 enabled xmm_clobber_test &&
4771     check_ldflags -Wl,--wrap,avcodec_open2              \
4772                   -Wl,--wrap,avcodec_decode_audio4      \
4773                   -Wl,--wrap,avcodec_decode_video2      \
4774                   -Wl,--wrap,avcodec_decode_subtitle2   \
4775                   -Wl,--wrap,avcodec_encode_audio2      \
4776                   -Wl,--wrap,avcodec_encode_video2      \
4777                   -Wl,--wrap,avcodec_encode_subtitle    \
4778                   -Wl,--wrap,avresample_convert         \
4779                   -Wl,--wrap,sws_scale ||
4780     disable xmm_clobber_test
4781
4782 echo "X { local: *; };" > $TMPV
4783 if test_ldflags -Wl,--version-script,$TMPV; then
4784     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4785 elif test_ldflags -Wl,-M,$TMPV; then
4786     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4787 fi
4788
4789 check_cc <<EOF && enable symver_asm_label
4790 void ff_foo(void) __asm__ ("av_foo@VERSION");
4791 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4792 EOF
4793     check_cc <<EOF && enable symver_gnu_asm
4794 __asm__(".symver ff_foo,av_foo@VERSION");
4795 void ff_foo(void) {}
4796 EOF
4797
4798 if [ -z "$optflags" ]; then
4799     if enabled small; then
4800         optflags=$cflags_size
4801     elif enabled optimizations; then
4802         optflags=$cflags_speed
4803     else
4804         optflags=$cflags_noopt
4805     fi
4806 fi
4807
4808 check_optflags(){
4809     check_cflags "$@"
4810     enabled lto && c