build: Add component for the SRTP common code
[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 disable(){
492     set_all no $*
493 }
494
495 enable_weak(){
496     set_weak yes $*
497 }
498
499 disable_weak(){
500     set_weak no $*
501 }
502
503 enable_safe(){
504     for var; do
505         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
506     done
507 }
508
509 disable_safe(){
510     for var; do
511         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
512     done
513 }
514
515 do_enable_deep(){
516     for var; do
517         enabled $var && continue
518         eval sel="\$${var}_select"
519         eval sgs="\$${var}_suggest"
520         pushvar var sgs
521         enable_deep $sel
522         popvar sgs
523         enable_deep_weak $sgs
524         popvar var
525     done
526 }
527
528 enable_deep(){
529     do_enable_deep $*
530     enable $*
531 }
532
533 enable_deep_weak(){
534     for var; do
535         disabled $var && continue
536         pushvar var
537         do_enable_deep $var
538         popvar var
539         enable_weak $var
540     done
541 }
542
543 enabled(){
544     test "${1#!}" = "$1" && op== || op=!=
545     eval test "x\$${1#!}" $op "xyes"
546 }
547
548 disabled(){
549     test "${1#!}" = "$1" && op== || op=!=
550     eval test "x\$${1#!}" $op "xno"
551 }
552
553 enabled_all(){
554     for opt; do
555         enabled $opt || return 1
556     done
557 }
558
559 disabled_all(){
560     for opt; do
561         disabled $opt || return 1
562     done
563 }
564
565 enabled_any(){
566     for opt; do
567         enabled $opt && return 0
568     done
569 }
570
571 disabled_any(){
572     for opt; do
573         disabled $opt && return 0
574     done
575     return 1
576 }
577
578 set_default(){
579     for opt; do
580         eval : \${$opt:=\$${opt}_default}
581     done
582 }
583
584 is_in(){
585     value=$1
586     shift
587     for var in $*; do
588         [ $var = $value ] && return 0
589     done
590     return 1
591 }
592
593 do_check_deps(){
594     for cfg; do
595         cfg="${cfg#!}"
596         enabled ${cfg}_checking && die "Circular dependency for $cfg."
597         disabled ${cfg}_checking && continue
598         enable ${cfg}_checking
599         append allopts $cfg
600
601         eval dep_all="\$${cfg}_deps"
602         eval dep_any="\$${cfg}_deps_any"
603         eval dep_sel="\$${cfg}_select"
604         eval dep_sgs="\$${cfg}_suggest"
605         eval dep_ifa="\$${cfg}_if"
606         eval dep_ifn="\$${cfg}_if_any"
607
608         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
609         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
610         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
611
612         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
613         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
614         enabled_all  $dep_all || disable $cfg
615         enabled_any  $dep_any || disable $cfg
616         disabled_any $dep_sel && disable $cfg
617
618         if enabled $cfg; then
619             enable_deep $dep_sel
620             enable_deep_weak $dep_sgs
621         fi
622
623         disable ${cfg}_checking
624     done
625 }
626
627 check_deps(){
628     unset allopts
629
630     do_check_deps "$@"
631
632     for cfg in $allopts; do
633         enabled $cfg || continue
634         eval dep_extralibs="\$${cfg}_extralibs"
635         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
636     done
637 }
638
639 print_config(){
640     pfx=$1
641     files=$2
642     shift 2
643     map 'eval echo "$v \${$v:-no}"' "$@" |
644     awk "BEGIN { split(\"$files\", files) }
645         {
646             c = \"$pfx\" toupper(\$1);
647             v = \$2;
648             sub(/yes/, 1, v);
649             sub(/no/,  0, v);
650             for (f in files) {
651                 file = files[f];
652                 if (file ~ /\\.h\$/) {
653                     printf(\"#define %s %d\\n\", c, v) >>file;
654                 } else if (file ~ /\\.asm\$/) {
655                     printf(\"%%define %s %d\\n\", c, v) >>file;
656                 } else if (file ~ /\\.mak\$/) {
657                     n = -v ? \"\" : \"!\";
658                     printf(\"%s%s=yes\\n\", n, c) >>file;
659                 }
660             }
661         }"
662 }
663
664 print_enabled(){
665     suf=$1
666     shift
667     for v; do
668         enabled $v && printf "%s\n" ${v%$suf};
669     done
670 }
671
672 append(){
673     var=$1
674     shift
675     eval "$var=\"\$$var $*\""
676 }
677
678 prepend(){
679     var=$1
680     shift
681     eval "$var=\"$* \$$var\""
682 }
683
684 unique(){
685     var=$1
686     uniq_list=""
687     for tok in $(eval echo \$$var); do
688         uniq_list="$(filter_out $tok $uniq_list) $tok"
689     done
690     eval "$var=\"${uniq_list}\""
691 }
692
693 add_cppflags(){
694     append CPPFLAGS "$@"
695 }
696
697 add_cflags(){
698     append CFLAGS $($cflags_filter "$@")
699 }
700
701 add_asflags(){
702     append ASFLAGS $($asflags_filter "$@")
703 }
704
705 add_objcflags(){
706     append OBJCFLAGS $($objcflags_filter "$@")
707 }
708
709 add_ldflags(){
710     append LDFLAGS $($ldflags_filter "$@")
711 }
712
713 add_ldexeflags(){
714     append LDEXEFLAGS $($ldflags_filter "$@")
715 }
716
717 add_stripflags(){
718     append STRIPFLAGS "$@"
719 }
720
721 add_extralibs(){
722     prepend extralibs $($ldflags_filter "$@")
723 }
724
725 add_host_cppflags(){
726     append host_cppflags "$@"
727 }
728
729 add_host_cflags(){
730     append host_cflags $($host_cflags_filter "$@")
731 }
732
733 add_host_ldflags(){
734     append host_ldflags $($host_ldflags_filter "$@")
735 }
736
737 add_compat(){
738     append compat_objs $1
739     shift
740     map 'add_cppflags -D$v' "$@"
741 }
742
743 check_cmd(){
744     log "$@"
745     "$@" >> $logfile 2>&1
746 }
747
748 cc_o(){
749     eval printf '%s\\n' $CC_O
750 }
751
752 cc_e(){
753     eval printf '%s\\n' $CC_E
754 }
755
756 check_cc(){
757     log check_cc "$@"
758     cat > $TMPC
759     log_file $TMPC
760     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
761 }
762
763 check_objcc(){
764     log check_objcc "$@"
765     cat > $TMPC
766     log_file $TMPC
767     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
768 }
769
770 check_cpp(){
771     log check_cpp "$@"
772     cat > $TMPC
773     log_file $TMPC
774     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
775 }
776
777 as_o(){
778     eval printf '%s\\n' $AS_O
779 }
780
781 check_as(){
782     log check_as "$@"
783     cat > $TMPS
784     log_file $TMPS
785     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
786 }
787
788 check_inline_asm(){
789     log check_inline_asm "$@"
790     name="$1"
791     code="$2"
792     shift 2
793     disable $name
794     check_cc "$@" <<EOF && enable $name
795 void foo(void){ __asm__ volatile($code); }
796 EOF
797 }
798
799 check_insn(){
800     log check_insn "$@"
801     check_inline_asm ${1}_inline "\"$2\""
802     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
803 }
804
805 check_yasm(){
806     log check_yasm "$@"
807     echo "$1" > $TMPS
808     log_file $TMPS
809     shift 1
810     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
811 }
812
813 ld_o(){
814     eval printf '%s\\n' $LD_O
815 }
816
817 check_ld(){
818     log check_ld "$@"
819     flags=$(filter_out '-l*' "$@")
820     libs=$(filter '-l*' "$@")
821     check_cc $($cflags_filter $flags) || return
822     flags=$($ldflags_filter $flags)
823     libs=$($ldflags_filter $libs)
824     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
825 }
826
827 print_include(){
828     hdr=$1
829     test "${hdr%.h}" = "${hdr}" &&
830         echo "#include $hdr"    ||
831         echo "#include <$hdr>"
832 }
833
834 check_code(){
835     log check_code "$@"
836     check=$1
837     headers=$2
838     code=$3
839     shift 3
840     {
841         for hdr in $headers; do
842             print_include $hdr
843         done
844         echo "int main(void) { $code; return 0; }"
845     } | check_$check "$@"
846 }
847
848 check_cppflags(){
849     log check_cppflags "$@"
850     check_cc "$@" <<EOF && append CPPFLAGS "$@"
851 int x;
852 EOF
853 }
854
855 test_cflags(){
856     log test_cflags "$@"
857     set -- $($cflags_filter "$@")
858     check_cc "$@" <<EOF
859 int x;
860 EOF
861 }
862
863 check_cflags(){
864     log check_cflags "$@"
865     test_cflags "$@" && add_cflags "$@"
866 }
867
868 test_objcflags(){
869     log test_cflags "$@"
870     set -- $($cflags_filter "$@")
871     check_objcc "$@" <<EOF
872 int x;
873 EOF
874 }
875
876 check_objcflags(){
877     log check_cflags "$@"
878     test_objcflags "$@" && add_objcflags "$@"
879 }
880
881 test_ldflags(){
882     log test_ldflags "$@"
883     check_ld "$@" <<EOF
884 int main(void){ return 0; }
885 EOF
886 }
887
888 check_ldflags(){
889     log check_ldflags "$@"
890     test_ldflags "$@" && add_ldflags "$@"
891 }
892
893 test_stripflags(){
894     log test_stripflags "$@"
895     # call check_cc to get a fresh TMPO
896     check_cc <<EOF
897 int main(void) { return 0; }
898 EOF
899     check_cmd $strip $STRIPFLAGS "$@" $TMPO
900 }
901
902 check_stripflags(){
903     log check_stripflags "$@"
904     test_stripflags "$@" && add_stripflags "$@"
905 }
906
907 check_header(){
908     log check_header "$@"
909     header=$1
910     shift
911     disable_safe $header
912     check_cpp "$@" <<EOF && enable_safe $header
913 #include <$header>
914 int x;
915 EOF
916 }
917
918 check_func(){
919     log check_func "$@"
920     func=$1
921     shift
922     disable $func
923     check_ld "$@" <<EOF && enable $func
924 extern int $func();
925 int main(void){ $func(); }
926 EOF
927 }
928
929 check_mathfunc(){
930     log check_mathfunc "$@"
931     func=$1
932     narg=$2
933     shift 2
934     test $narg = 2 && args="f, g" || args="f"
935     disable $func
936     check_ld "$@" <<EOF && enable $func
937 #include <math.h>
938 float foo(float f, float g) { return $func($args); }
939 int main(void){ return 0; }
940 EOF
941 }
942
943 check_func_headers(){
944     log check_func_headers "$@"
945     headers=$1
946     funcs=$2
947     shift 2
948     {
949         for hdr in $headers; do
950             print_include $hdr
951         done
952         for func in $funcs; do
953             echo "long check_$func(void) { return (long) $func; }"
954         done
955         echo "int main(void) { return 0; }"
956     } | check_ld "$@" && enable $funcs && enable_safe $headers
957 }
958
959 check_cpp_condition(){
960     log check_cpp_condition "$@"
961     header=$1
962     condition=$2
963     shift 2
964     check_cpp "$@" <<EOF
965 #include <$header>
966 #if !($condition)
967 #error "unsatisfied condition: $condition"
968 #endif
969 EOF
970 }
971
972 check_lib(){
973     log check_lib "$@"
974     header="$1"
975     func="$2"
976     shift 2
977     check_header $header && check_func $func "$@" && add_extralibs "$@"
978 }
979
980 check_lib2(){
981     log check_lib2 "$@"
982     headers="$1"
983     funcs="$2"
984     shift 2
985     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
986 }
987
988 check_pkg_config(){
989     log check_pkg_config "$@"
990     pkg="$1"
991     headers="$2"
992     funcs="$3"
993     shift 3
994     check_cmd $pkg_config --exists --print-errors $pkg || return
995     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
996     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
997     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
998         set_safe "${pkg}_cflags" $pkg_cflags   &&
999         set_safe "${pkg}_libs"   $pkg_libs
1000 }
1001
1002 check_exec(){
1003     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1004 }
1005
1006 check_exec_crash(){
1007     code=$(cat)
1008
1009     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1010     # are safe but may not be available everywhere.  Thus we use
1011     # raise(SIGTERM) instead.  The check is run in a subshell so we
1012     # can redirect the "Terminated" message from the shell.  SIGBUS
1013     # is not defined by standard C so it is used conditionally.
1014
1015     (check_exec "$@") >> $logfile 2>&1 <<EOF
1016 #include <signal.h>
1017 static void sighandler(int sig){
1018     raise(SIGTERM);
1019 }
1020 int foo(void){
1021     $code
1022 }
1023 int (*func_ptr)(void) = foo;
1024 int main(void){
1025     signal(SIGILL, sighandler);
1026     signal(SIGFPE, sighandler);
1027     signal(SIGSEGV, sighandler);
1028 #ifdef SIGBUS
1029     signal(SIGBUS, sighandler);
1030 #endif
1031     return func_ptr();
1032 }
1033 EOF
1034 }
1035
1036 check_type(){
1037     log check_type "$@"
1038     headers=$1
1039     type=$2
1040     shift 2
1041     disable_safe "$type"
1042     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1043 }
1044
1045 check_struct(){
1046     log check_struct "$@"
1047     headers=$1
1048     struct=$2
1049     member=$3
1050     shift 3
1051     disable_safe "${struct}_${member}"
1052     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1053         enable_safe "${struct}_${member}"
1054 }
1055
1056 check_builtin(){
1057     log check_builtin "$@"
1058     name=$1
1059     headers=$2
1060     builtin=$3
1061     shift 3
1062     disable "$name"
1063     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1064 }
1065
1066 check_compile_assert(){
1067     log check_compile_assert "$@"
1068     name=$1
1069     headers=$2
1070     condition=$3
1071     shift 3
1072     disable "$name"
1073     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1074 }
1075
1076 require(){
1077     name="$1"
1078     header="$2"
1079     func="$3"
1080     shift 3
1081     check_lib $header $func "$@" || die "ERROR: $name not found"
1082 }
1083
1084 require2(){
1085     name="$1"
1086     headers="$2"
1087     func="$3"
1088     shift 3
1089     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1090 }
1091
1092 require_pkg_config(){
1093     pkg="$1"
1094     check_pkg_config "$@" || die "ERROR: $pkg not found"
1095     add_cflags    $(get_safe "${pkg}_cflags")
1096     add_extralibs $(get_safe "${pkg}_libs")
1097 }
1098
1099 hostcc_e(){
1100     eval printf '%s\\n' $HOSTCC_E
1101 }
1102
1103 hostcc_o(){
1104     eval printf '%s\\n' $HOSTCC_O
1105 }
1106
1107 check_host_cc(){
1108     log check_host_cc "$@"
1109     cat > $TMPC
1110     log_file $TMPC
1111     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1112 }
1113
1114 check_host_cpp(){
1115     log check_host_cpp "$@"
1116     cat > $TMPC
1117     log_file $TMPC
1118     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1119 }
1120
1121 check_host_cppflags(){
1122     log check_host_cppflags "$@"
1123     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1124 int x;
1125 EOF
1126 }
1127
1128 check_host_cflags(){
1129     log check_host_cflags "$@"
1130     set -- $($host_cflags_filter "$@")
1131     check_host_cc "$@" <<EOF && append host_cflags "$@"
1132 int x;
1133 EOF
1134 }
1135
1136 check_host_cpp_condition(){
1137     log check_host_cpp_condition "$@"
1138     header=$1
1139     condition=$2
1140     shift 2
1141     check_host_cpp "$@" <<EOF
1142 #include <$header>
1143 #if !($condition)
1144 #error "unsatisfied condition: $condition"
1145 #endif
1146 EOF
1147 }
1148
1149 apply(){
1150     file=$1
1151     shift
1152     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1153 }
1154
1155 cp_if_changed(){
1156     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1157     mkdir -p "$(dirname $2)"
1158     $cp_f "$1" "$2"
1159 }
1160
1161 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1162 # system-dependent things.
1163
1164 AVCODEC_COMPONENTS="
1165     bsfs
1166     decoders
1167     encoders
1168     hwaccels
1169     parsers
1170 "
1171
1172 AVDEVICE_COMPONENTS="
1173     indevs
1174     outdevs
1175 "
1176 AVFILTER_COMPONENTS="
1177     filters
1178 "
1179 AVFORMAT_COMPONENTS="
1180     demuxers
1181     muxers
1182     protocols
1183 "
1184
1185 AVRESAMPLE_COMPONENTS=""
1186 AVUTIL_COMPONENTS=""
1187
1188 COMPONENT_LIST="
1189     $AVCODEC_COMPONENTS
1190     $AVDEVICE_COMPONENTS
1191     $AVFILTER_COMPONENTS
1192     $AVFORMAT_COMPONENTS
1193     $AVRESAMPLE_COMPONENTS
1194     $AVUTIL_COMPONENTS
1195 "
1196
1197 EXAMPLE_LIST="
1198     avcodec_example
1199     filter_audio_example
1200     metadata_example
1201     output_example
1202     qsvdec_example
1203     transcode_aac_example
1204 "
1205
1206 EXTERNAL_LIBRARY_LIST="
1207     avisynth
1208     bzlib
1209     cuda
1210     frei0r
1211     gnutls
1212     libbs2b
1213     libcdio
1214     libdc1394
1215     libdcadec
1216     libfaac
1217     libfdk_aac
1218     libfontconfig
1219     libfreetype
1220     libgsm
1221     libilbc
1222     libkvazaar
1223     libmfx
1224     libmp3lame
1225     libopencore_amrnb
1226     libopencore_amrwb
1227     libopencv
1228     libopenh264
1229     libopenjpeg
1230     libopus
1231     libpulse
1232     librtmp
1233     libschroedinger
1234     libsnappy
1235     libspeex
1236     libtheora
1237     libtwolame
1238     libvo_aacenc
1239     libvo_amrwbenc
1240     libvorbis
1241     libvpx
1242     libwavpack
1243     libwebp
1244     libx264
1245     libx265
1246     libxavs
1247     libxcb
1248     libxcb_shm
1249     libxcb_xfixes
1250     libxvid
1251     mmal
1252     nvenc
1253     openssl
1254     x11grab
1255     zlib
1256 "
1257
1258 FEATURE_LIST="
1259     gray
1260     hardcoded_tables
1261     runtime_cpudetect
1262     safe_bitstream_reader
1263     shared
1264     small
1265     sram
1266     static
1267     swscale_alpha
1268 "
1269
1270 HWACCEL_LIST="
1271     d3d11va
1272     dxva2
1273     vaapi
1274     vda
1275     vdpau
1276 "
1277
1278 LIBRARY_LIST="
1279     avcodec
1280     avdevice
1281     avfilter
1282     avformat
1283     avresample
1284     avutil
1285     swscale
1286 "
1287
1288 LICENSE_LIST="
1289     gpl
1290     nonfree
1291     version3
1292 "
1293
1294 PROGRAM_LIST="
1295     avconv
1296     avplay
1297     avprobe
1298 "
1299
1300 SUBSYSTEM_LIST="
1301     dct
1302     doc
1303     error_resilience
1304     faan
1305     fft
1306     lsp
1307     lzo
1308     mdct
1309     network
1310     rdft
1311 "
1312
1313 CONFIG_LIST="
1314     $COMPONENT_LIST
1315     $EXAMPLE_LIST
1316     $EXTERNAL_LIBRARY_LIST
1317     $FEATURE_LIST
1318     $HWACCEL_LIST
1319     $LICENSE_LIST
1320     $LIBRARY_LIST
1321     $PROGRAM_LIST
1322     $SUBSYSTEM_LIST
1323     memalign_hack
1324     neon_clobber_test
1325     pic
1326     pod2man
1327     texi2html
1328     thumb
1329     valgrind_backtrace
1330     xmm_clobber_test
1331 "
1332
1333 THREADS_LIST="
1334     pthreads
1335     w32threads
1336 "
1337
1338 ATOMICS_LIST="
1339     atomics_gcc
1340     atomics_suncc
1341     atomics_win32
1342 "
1343
1344 ARCH_LIST="
1345     aarch64
1346     alpha
1347     arm
1348     avr32
1349     avr32_ap
1350     avr32_uc
1351     bfin
1352     ia64
1353     m68k
1354     mips
1355     mips64
1356     parisc
1357     ppc
1358     ppc64
1359     s390
1360     sh4
1361     sparc
1362     sparc64
1363     tilegx
1364     tilepro
1365     tomi
1366     x86
1367     x86_32
1368     x86_64
1369 "
1370
1371 ARCH_EXT_LIST_ARM="
1372     armv5te
1373     armv6
1374     armv6t2
1375     armv8
1376     neon
1377     vfp
1378     vfpv3
1379 "
1380
1381 ARCH_EXT_LIST_X86_SIMD="
1382     amd3dnow
1383     amd3dnowext
1384     avx
1385     avx2
1386     fma3
1387     fma4
1388     mmx
1389     mmxext
1390     sse
1391     sse2
1392     sse3
1393     sse4
1394     sse42
1395     ssse3
1396     xop
1397 "
1398
1399 ARCH_EXT_LIST_PPC="
1400     altivec
1401     dcbzl
1402     ldbrx
1403     power8
1404     ppc4xx
1405     vsx
1406 "
1407
1408 ARCH_EXT_LIST_X86="
1409     $ARCH_EXT_LIST_X86_SIMD
1410     cpunop
1411     i686
1412 "
1413
1414 ARCH_EXT_LIST_MIPS="
1415     loongson
1416     mips32r1
1417     mips64r1
1418     mips32r2
1419     mips64r2
1420     mips32r6
1421     mips64r6
1422 "
1423
1424 ARCH_EXT_LIST="
1425     $ARCH_EXT_LIST_ARM
1426     $ARCH_EXT_LIST_MIPS
1427     $ARCH_EXT_LIST_PPC
1428     $ARCH_EXT_LIST_X86
1429     vis
1430 "
1431
1432 ARCH_FEATURES="
1433     aligned_stack
1434     fast_64bit
1435     fast_clz
1436     fast_cmov
1437     local_aligned_8
1438     local_aligned_16
1439     simd_align_16
1440 "
1441
1442 BUILTIN_LIST="
1443     atomic_cas_ptr
1444     machine_rw_barrier
1445     MemoryBarrier
1446     mm_empty
1447     rdtsc
1448     sync_val_compare_and_swap
1449 "
1450 HAVE_LIST_CMDLINE="
1451     inline_asm
1452     symver
1453     yasm
1454 "
1455
1456 HAVE_LIST_PUB="
1457     bigendian
1458     fast_unaligned
1459 "
1460
1461 HEADERS_LIST="
1462     AVFoundation_AVFoundation_h
1463     alsa_asoundlib_h
1464     altivec_h
1465     arpa_inet_h
1466     cdio_paranoia_h
1467     cdio_paranoia_paranoia_h
1468     dev_bktr_ioctl_bt848_h
1469     dev_bktr_ioctl_meteor_h
1470     dev_ic_bt8xx_h
1471     dev_video_bktr_ioctl_bt848_h
1472     dev_video_meteor_ioctl_meteor_h
1473     direct_h
1474     dlfcn_h
1475     d3d11_h
1476     dxva_h
1477     gsm_h
1478     io_h
1479     mach_mach_time_h
1480     machine_ioctl_bt848_h
1481     machine_ioctl_meteor_h
1482     malloc_h
1483     poll_h
1484     sndio_h
1485     soundcard_h
1486     sys_mman_h
1487     sys_param_h
1488     sys_resource_h
1489     sys_select_h
1490     sys_soundcard_h
1491     sys_time_h
1492     sys_un_h
1493     sys_videoio_h
1494     unistd_h
1495     valgrind_valgrind_h
1496     windows_h
1497     winsock2_h
1498 "
1499
1500 INTRINSICS_LIST="
1501     intrinsics_neon
1502 "
1503
1504 MATH_FUNCS="
1505     atanf
1506     atan2f
1507     cbrtf
1508     cosf
1509     exp2
1510     exp2f
1511     expf
1512     isinf
1513     isnan
1514     ldexpf
1515     llrint
1516     llrintf
1517     log2
1518     log2f
1519     log10f
1520     lrint
1521     lrintf
1522     powf
1523     rint
1524     round
1525     roundf
1526     sinf
1527     trunc
1528     truncf
1529 "
1530
1531 SYSTEM_FUNCS="
1532     aligned_malloc
1533     clock_gettime
1534     closesocket
1535     CommandLineToArgvW
1536     CoTaskMemFree
1537     CryptGenRandom
1538     dlopen
1539     fcntl
1540     flt_lim
1541     fork
1542     getaddrinfo
1543     gethrtime
1544     getopt
1545     GetProcessAffinityMask
1546     GetProcessMemoryInfo
1547     GetProcessTimes
1548     getrusage
1549     GetSystemTimeAsFileTime
1550     gettimeofday
1551     gmtime_r
1552     inet_aton
1553     isatty
1554     jack_port_get_latency_range
1555     LoadLibrary
1556     localtime_r
1557     mach_absolute_time
1558     MapViewOfFile
1559     memalign
1560     mkstemp
1561     mmap
1562     mprotect
1563     nanosleep
1564     posix_memalign
1565     sched_getaffinity
1566     SetConsoleTextAttribute
1567     setmode
1568     setrlimit
1569     Sleep
1570     strerror_r
1571     sysconf
1572     sysctl
1573     usleep
1574     VirtualAlloc
1575 "
1576
1577 TOOLCHAIN_FEATURES="
1578     as_dn_directive
1579     as_func
1580     as_object_arch
1581     asm_mod_q
1582     attribute_may_alias
1583     attribute_packed
1584     ebp_available
1585     ebx_available
1586     gnu_as
1587     ibm_asm
1588     inline_asm_labels
1589     pragma_deprecated
1590     symver_asm_label
1591     symver_gnu_asm
1592     vfp_args
1593     xform_asm
1594     xmm_clobbers
1595 "
1596
1597 TYPES_LIST="
1598     CONDITION_VARIABLE_Ptr
1599     socklen_t
1600     struct_addrinfo
1601     struct_group_source_req
1602     struct_ip_mreq_source
1603     struct_ipv6_mreq
1604     struct_pollfd
1605     struct_rusage_ru_maxrss
1606     struct_sockaddr_in6
1607     struct_sockaddr_sa_len
1608     struct_sockaddr_storage
1609     struct_v4l2_frmivalenum_discrete
1610 "
1611
1612 HAVE_LIST="
1613     $ARCH_EXT_LIST
1614     $(add_suffix _external $ARCH_EXT_LIST)
1615     $(add_suffix _inline   $ARCH_EXT_LIST)
1616     $ARCH_FEATURES
1617     $ATOMICS_LIST
1618     $BUILTIN_LIST
1619     $HAVE_LIST_CMDLINE
1620     $HAVE_LIST_PUB
1621     $HEADERS_LIST
1622     $INTRINSICS_LIST
1623     $MATH_FUNCS
1624     $SYSTEM_FUNCS
1625     $THREADS_LIST
1626     $TOOLCHAIN_FEATURES
1627     $TYPES_LIST
1628     atomics_native
1629     dos_paths
1630     dxva2_lib
1631     libc_msvcrt
1632     libdc1394_1
1633     libdc1394_2
1634     sdl
1635     section_data_rel_ro
1636     threads
1637     vaapi_x11
1638     vdpau_x11
1639     xlib
1640 "
1641
1642 # options emitted with CONFIG_ prefix but not available on the command line
1643 CONFIG_EXTRA="
1644     aandcttables
1645     ac3dsp
1646     audio_frame_queue
1647     audiodsp
1648     blockdsp
1649     bswapdsp
1650     cabac
1651     dirac_parse
1652     dvprofile
1653     faandct
1654     faanidct
1655     fdctdsp
1656     flacdsp
1657     fmtconvert
1658     g722dsp
1659     gcrypt
1660     gmp
1661     golomb
1662     gplv3
1663     h263dsp
1664     h264chroma
1665     h264dsp
1666     h264pred
1667     h264qpel
1668     hpeldsp
1669     huffman
1670     huffyuvdsp
1671     huffyuvencdsp
1672     idctdsp
1673     iirfilter
1674     imdct15
1675     intrax8
1676     iso_media
1677     ividsp
1678     jpegtables
1679     libx262
1680     lgplv3
1681     lpc
1682     lzf
1683     me_cmp
1684     mpeg_er
1685     mpegaudio
1686     mpegaudiodsp
1687     mpegvideo
1688     mpegvideoenc
1689     mss34dsp
1690     pixblockdsp
1691     qpeldsp
1692     qsv
1693     qsvdec
1694     qsvenc
1695     rangecoder
1696     riffdec
1697     riffenc
1698     rtpdec
1699     rtpenc_chain
1700     rv34dsp
1701     sinewin
1702     snappy
1703     srtp
1704     startcode
1705     texturedsp
1706     texturedspenc
1707     tpeldsp
1708     vc1dsp
1709     videodsp
1710     vp3dsp
1711     vp56dsp
1712     vp8dsp
1713     wma_freqs
1714     wmv2dsp
1715 "
1716
1717 CMDLINE_SELECT="
1718     $ARCH_EXT_LIST
1719     $CONFIG_LIST
1720     $HAVE_LIST_CMDLINE
1721     $THREADS_LIST
1722     asm
1723     cross_compile
1724     debug
1725     extra_warnings
1726     logging
1727     lto
1728     optimizations
1729     rpath
1730 "
1731
1732 PATHS_LIST="
1733     bindir
1734     datadir
1735     docdir
1736     incdir
1737     libdir
1738     mandir
1739     prefix
1740     shlibdir
1741 "
1742
1743 CMDLINE_SET="
1744     $PATHS_LIST
1745     ar
1746     arch
1747     as
1748     build_suffix
1749     cc
1750     objcc
1751     cpu
1752     cross_prefix
1753     custom_allocator
1754     dep_cc
1755     env
1756     extra_version
1757     host_cc
1758     host_cflags
1759     host_ld
1760     host_ldflags
1761     host_libs
1762     host_os
1763     ld
1764     logfile
1765     malloc_prefix
1766     nm
1767     optflags
1768     pkg_config
1769     pkg_config_flags
1770     random_seed
1771     samples
1772     sysinclude
1773     sysroot
1774     target_exec
1775     target_os
1776     target_path
1777     target_samples
1778     toolchain
1779 "
1780
1781 CMDLINE_APPEND="
1782     extra_cflags
1783     extra_objcflags
1784     host_cppflags
1785 "
1786
1787 # code dependency declarations
1788
1789 # architecture extensions
1790
1791 armv5te_deps="arm"
1792 armv6_deps="arm"
1793 armv6t2_deps="arm"
1794 armv8_deps="aarch64"
1795 neon_deps_any="aarch64 arm"
1796 intrinsics_neon_deps="neon"
1797 vfp_deps_any="aarch64 arm"
1798 vfpv3_deps="vfp"
1799
1800 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1801
1802 altivec_deps="ppc"
1803 ppc4xx_deps="ppc"
1804 vsx_deps="altivec"
1805 power8_deps="vsx"
1806
1807 cpunop_deps="i686"
1808 x86_64_select="i686"
1809 x86_64_suggest="fast_cmov"
1810
1811 amd3dnow_deps="mmx"
1812 amd3dnowext_deps="amd3dnow"
1813 i686_deps="x86"
1814 mmx_deps="x86"
1815 mmxext_deps="mmx"
1816 sse_deps="mmxext"
1817 sse2_deps="sse"
1818 sse3_deps="sse2"
1819 ssse3_deps="sse3"
1820 sse4_deps="ssse3"
1821 sse42_deps="sse4"
1822 avx_deps="sse42"
1823 xop_deps="avx"
1824 fma3_deps="avx"
1825 fma4_deps="avx"
1826 avx2_deps="avx"
1827
1828 mmx_external_deps="yasm"
1829 mmx_inline_deps="inline_asm"
1830 mmx_suggest="mmx_external mmx_inline"
1831
1832 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1833     eval dep=\$${ext}_deps
1834     eval ${ext}_external_deps='"${dep}_external"'
1835     eval ${ext}_inline_deps='"${dep}_inline"'
1836     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1837 done
1838
1839 aligned_stack_if_any="aarch64 ppc x86"
1840 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1841 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1842 fast_unaligned_if_any="aarch64 ppc x86"
1843 simd_align_16_if_any="altivec neon sse"
1844
1845 # system capabilities
1846 symver_if_any="symver_asm_label symver_gnu_asm"
1847 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1848
1849 # threading support
1850 atomics_gcc_if="sync_val_compare_and_swap"
1851 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1852 atomics_win32_if="MemoryBarrier"
1853 atomics_native_if_any="$ATOMICS_LIST"
1854 w32threads_deps="atomics_native"
1855 threads_if_any="$THREADS_LIST"
1856
1857 # subsystems
1858 dct_select="rdft"
1859 dirac_parse_select="golomb"
1860 error_resilience_select="me_cmp"
1861 faandct_deps="faan fdctdsp"
1862 faanidct_deps="faan idctdsp"
1863 h264dsp_select="startcode"
1864 mdct_select="fft"
1865 rdft_select="fft"
1866 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1867 mpeg_er_select="error_resilience"
1868 mpegaudio_select="mpegaudiodsp"
1869 mpegaudiodsp_select="dct"
1870 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1871 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1872 nvenc_deps_any="dlopen LoadLibrary"
1873 nvenc_extralibs='$ldl'
1874 qsvdec_select="qsv"
1875 qsvenc_select="qsv"
1876 vc1dsp_select="h264chroma qpeldsp startcode"
1877
1878 # decoders / encoders
1879 aac_decoder_select="imdct15 mdct sinewin"
1880 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1881 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1882 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1883 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1884 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1885 adpcm_g722_decoder_select="g722dsp"
1886 adpcm_g722_encoder_select="g722dsp"
1887 aic_decoder_select="golomb idctdsp"
1888 alac_encoder_select="lpc"
1889 als_decoder_select="bswapdsp"
1890 amrnb_decoder_select="lsp"
1891 amrwb_decoder_select="lsp"
1892 amv_decoder_select="sp5x_decoder"
1893 ape_decoder_select="bswapdsp"
1894 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1895 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1896 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1897 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1898 atrac1_decoder_select="mdct sinewin"
1899 atrac3_decoder_select="mdct"
1900 atrac3p_decoder_select="mdct sinewin"
1901 bink_decoder_select="blockdsp hpeldsp"
1902 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1903 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1904 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1905 cllc_decoder_select="bswapdsp"
1906 comfortnoise_encoder_select="lpc"
1907 cook_decoder_select="audiodsp mdct sinewin"
1908 cscd_decoder_select="lzo"
1909 cscd_decoder_suggest="zlib"
1910 dca_decoder_select="fmtconvert mdct"
1911 dds_decoder_select="texturedsp"
1912 dnxhd_decoder_select="blockdsp idctdsp"
1913 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1914 dvvideo_decoder_select="dvprofile idctdsp"
1915 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1916 dxa_decoder_deps="zlib"
1917 dxv_decoder_select="lzf texturedsp"
1918 eac3_decoder_select="ac3_decoder"
1919 eac3_encoder_select="ac3_encoder"
1920 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1921 eatgq_decoder_select="aandcttables idctdsp"
1922 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1923 exr_decoder_deps="zlib"
1924 ffv1_decoder_select="golomb rangecoder"
1925 ffv1_encoder_select="rangecoder"
1926 ffvhuff_decoder_select="huffyuv_decoder"
1927 ffvhuff_encoder_select="huffyuv_encoder"
1928 fic_decoder_select="golomb"
1929 flac_decoder_select="flacdsp golomb"
1930 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1931 flashsv_decoder_deps="zlib"
1932 flashsv_encoder_deps="zlib"
1933 flashsv2_decoder_deps="zlib"
1934 flv_decoder_select="h263_decoder"
1935 flv_encoder_select="h263_encoder"
1936 fourxm_decoder_select="blockdsp bswapdsp"
1937 fraps_decoder_select="bswapdsp huffman"
1938 g2m_decoder_deps="zlib"
1939 g2m_decoder_select="blockdsp idctdsp jpegtables"
1940 h261_decoder_select="mpeg_er mpegvideo"
1941 h261_encoder_select="aandcttables mpegvideoenc"
1942 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1943 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1944 h263i_decoder_select="h263_decoder"
1945 h263p_encoder_select="h263_encoder"
1946 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
1947 h264_decoder_suggest="error_resilience"
1948 h264_nvenc_encoder_deps="nvenc"
1949 h264_qsv_decoder_deps="libmfx"
1950 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1951 h264_qsv_encoder_deps="libmfx"
1952 h264_qsv_encoder_select="qsvenc"
1953 hap_decoder_select="snappy texturedsp"
1954 hap_encoder_deps="libsnappy"
1955 hap_encoder_select="texturedspenc"
1956 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1957 hevc_nvenc_encoder_deps="nvenc"
1958 hevc_qsv_encoder_deps="libmfx"
1959 hevc_qsv_decoder_deps="libmfx"
1960 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1961 hevc_qsv_encoder_select="qsvenc"
1962 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1963 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1964 iac_decoder_select="imc_decoder"
1965 imc_decoder_select="bswapdsp fft mdct sinewin"
1966 indeo3_decoder_select="hpeldsp"
1967 indeo4_decoder_select="ividsp"
1968 indeo5_decoder_select="ividsp"
1969 interplay_video_decoder_select="hpeldsp"
1970 jpegls_decoder_select="golomb mjpeg_decoder"
1971 jpegls_encoder_select="golomb"
1972 jv_decoder_select="blockdsp"
1973 lagarith_decoder_select="huffyuvdsp"
1974 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1975 loco_decoder_select="golomb"
1976 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1977 metasound_decoder_select="lsp mdct sinewin"
1978 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1979 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1980 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1981 mjpegb_decoder_select="mjpeg_decoder"
1982 mlp_decoder_select="mlp_parser"
1983 motionpixels_decoder_select="bswapdsp"
1984 mp1_decoder_select="mpegaudio"
1985 mp1float_decoder_select="mpegaudio"
1986 mp2_decoder_select="mpegaudio"
1987 mp2float_decoder_select="mpegaudio"
1988 mp3_decoder_select="mpegaudio"
1989 mp3adu_decoder_select="mpegaudio"
1990 mp3adufloat_decoder_select="mpegaudio"
1991 mp3float_decoder_select="mpegaudio"
1992 mp3on4_decoder_select="mpegaudio"
1993 mp3on4float_decoder_select="mpegaudio"
1994 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1995 mpc8_decoder_select="mpegaudiodsp"
1996 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1997 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1998 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
1999 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2000 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2001 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2002 mpeg2_qsv_decoder_deps="libmfx"
2003 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2004 mpeg2_qsv_encoder_deps="libmfx"
2005 mpeg2_qsv_encoder_select="qsvenc"
2006 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2007 mpeg4_encoder_select="h263_encoder"
2008 msa1_decoder_select="mss34dsp"
2009 msmpeg4v1_decoder_select="h263_decoder"
2010 msmpeg4v2_decoder_select="h263_decoder"
2011 msmpeg4v2_encoder_select="h263_encoder"
2012 msmpeg4v3_decoder_select="h263_decoder"
2013 msmpeg4v3_encoder_select="h263_encoder"
2014 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2015 mts2_decoder_select="mss34dsp"
2016 mxpeg_decoder_select="mjpeg_decoder"
2017 nellymoser_decoder_select="mdct sinewin"
2018 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2019 nuv_decoder_select="idctdsp lzo"
2020 nvenc_h264_encoder_deps="nvenc"
2021 nvenc_hevc_encoder_deps="nvenc"
2022 on2avc_decoder_select="mdct"
2023 opus_decoder_deps="avresample"
2024 opus_decoder_select="imdct15"
2025 png_decoder_deps="zlib"
2026 png_encoder_deps="zlib"
2027 png_encoder_select="huffyuvencdsp"
2028 prores_decoder_select="idctdsp"
2029 prores_encoder_select="fdctdsp"
2030 qcelp_decoder_select="lsp"
2031 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2032 ra_144_encoder_select="audio_frame_queue lpc"
2033 ralf_decoder_select="golomb"
2034 rscc_decoder_deps="zlib"
2035 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2036 rv10_encoder_select="h263_encoder"
2037 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2038 rv20_encoder_select="h263_encoder"
2039 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2040 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2041 screenpresso_decoder_deps="zlib"
2042 shorten_decoder_select="golomb"
2043 sipr_decoder_select="lsp"
2044 sp5x_decoder_select="mjpeg_decoder"
2045 svq1_decoder_select="hpeldsp"
2046 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2047 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2048 svq3_decoder_suggest="zlib"
2049 tak_decoder_select="audiodsp"
2050 tdsc_decoder_deps="zlib"
2051 tdsc_decoder_select="mjpeg_decoder"
2052 theora_decoder_select="vp3_decoder"
2053 thp_decoder_select="mjpeg_decoder"
2054 tiff_decoder_suggest="zlib"
2055 tiff_encoder_suggest="zlib"
2056 truehd_decoder_select="mlp_decoder"
2057 truemotion2_decoder_select="bswapdsp"
2058 truespeech_decoder_select="bswapdsp"
2059 tscc_decoder_deps="zlib"
2060 txd_decoder_select="texturedsp"
2061 twinvq_decoder_select="mdct lsp sinewin"
2062 utvideo_decoder_select="bswapdsp"
2063 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2064 vble_decoder_select="huffyuvdsp"
2065 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2066 vc1image_decoder_select="vc1_decoder"
2067 vorbis_decoder_select="mdct"
2068 vorbis_encoder_select="mdct"
2069 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2070 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2071 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2072 vp6a_decoder_select="vp6_decoder"
2073 vp6f_decoder_select="vp6_decoder"
2074 vp7_decoder_select="h264pred videodsp vp8dsp"
2075 vp8_decoder_select="h264pred videodsp vp8dsp"
2076 vp9_decoder_select="videodsp"
2077 webp_decoder_select="vp8_decoder"
2078 wmapro_decoder_select="mdct sinewin wma_freqs"
2079 wmav1_decoder_select="mdct sinewin wma_freqs"
2080 wmav1_encoder_select="mdct sinewin wma_freqs"
2081 wmav2_decoder_select="mdct sinewin wma_freqs"
2082 wmav2_encoder_select="mdct sinewin wma_freqs"
2083 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2084 wmv1_decoder_select="h263_decoder"
2085 wmv1_encoder_select="h263_encoder"
2086 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2087 wmv2_encoder_select="h263_encoder wmv2dsp"
2088 wmv3_decoder_select="vc1_decoder"
2089 wmv3image_decoder_select="wmv3_decoder"
2090 zerocodec_decoder_deps="zlib"
2091 zlib_decoder_deps="zlib"
2092 zlib_encoder_deps="zlib"
2093 zmbv_decoder_deps="zlib"
2094 zmbv_encoder_deps="zlib"
2095
2096 # hardware accelerators
2097 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2098 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2099 vaapi_deps="va_va_h"
2100 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2101 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2102 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2103
2104 h263_vaapi_hwaccel_deps="vaapi"
2105 h263_vaapi_hwaccel_select="h263_decoder"
2106 h264_d3d11va_hwaccel_deps="d3d11va"
2107 h264_d3d11va_hwaccel_select="h264_decoder"
2108 h264_dxva2_hwaccel_deps="dxva2"
2109 h264_dxva2_hwaccel_select="h264_decoder"
2110 h264_mmal_decoder_deps="mmal"
2111 h264_mmal_hwaccel_deps="mmal"
2112 h264_mmal_decoder_select="h264_decoder"
2113 h264_mmal_encoder_deps="mmal"
2114 h264_qsv_hwaccel_deps="libmfx"
2115 h264_vaapi_hwaccel_deps="vaapi"
2116 h264_vaapi_hwaccel_select="h264_decoder"
2117 h264_vda_hwaccel_deps="vda"
2118 h264_vda_hwaccel_select="h264_decoder"
2119 h264_vda_old_hwaccel_deps="vda"
2120 h264_vda_old_hwaccel_select="h264_decoder"
2121 h264_vdpau_hwaccel_deps="vdpau"
2122 h264_vdpau_hwaccel_select="h264_decoder"
2123 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2124 hevc_d3d11va_hwaccel_select="hevc_decoder"
2125 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2126 hevc_dxva2_hwaccel_select="hevc_decoder"
2127 hevc_qsv_hwaccel_deps="libmfx"
2128 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2129 hevc_vdpau_hwaccel_select="hevc_decoder"
2130 mpeg1_vdpau_hwaccel_deps="vdpau"
2131 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2132 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2133 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2134 mpeg2_dxva2_hwaccel_deps="dxva2"
2135 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2136 mpeg2_qsv_hwaccel_deps="libmfx"
2137 mpeg2_vaapi_hwaccel_deps="vaapi"
2138 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2139 mpeg2_vdpau_hwaccel_deps="vdpau"
2140 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2141 mpeg4_vaapi_hwaccel_deps="vaapi"
2142 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2143 mpeg4_vdpau_hwaccel_deps="vdpau"
2144 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2145 vc1_d3d11va_hwaccel_deps="d3d11va"
2146 vc1_d3d11va_hwaccel_select="vc1_decoder"
2147 vc1_dxva2_hwaccel_deps="dxva2"
2148 vc1_dxva2_hwaccel_select="vc1_decoder"
2149 vc1_vaapi_hwaccel_deps="vaapi"
2150 vc1_vaapi_hwaccel_select="vc1_decoder"
2151 vc1_vdpau_hwaccel_deps="vdpau"
2152 vc1_vdpau_hwaccel_select="vc1_decoder"
2153 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2154 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2155 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2156 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2157
2158 # parsers
2159 h264_parser_select="h264_decoder"
2160 hevc_parser_select="golomb"
2161 mpegvideo_parser_select="mpegvideo"
2162 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2163 vc1_parser_select="vc1dsp"
2164
2165 # bitstream_filters
2166 mjpeg2jpeg_bsf_select="jpegtables"
2167
2168 # external libraries
2169 libdcadec_decoder_deps="libdcadec"
2170 libfaac_encoder_deps="libfaac"
2171 libfaac_encoder_select="audio_frame_queue"
2172 libfdk_aac_decoder_deps="libfdk_aac"
2173 libfdk_aac_encoder_deps="libfdk_aac"
2174 libfdk_aac_encoder_select="audio_frame_queue"
2175 libgsm_decoder_deps="libgsm"
2176 libgsm_encoder_deps="libgsm"
2177 libgsm_ms_decoder_deps="libgsm"
2178 libgsm_ms_encoder_deps="libgsm"
2179 libilbc_decoder_deps="libilbc"
2180 libilbc_encoder_deps="libilbc"
2181 libkvazaar_encoder_deps="libkvazaar"
2182 libmp3lame_encoder_deps="libmp3lame"
2183 libmp3lame_encoder_select="audio_frame_queue"
2184 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2185 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2186 libopencore_amrnb_encoder_select="audio_frame_queue"
2187 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2188 libopenh264_encoder_deps="libopenh264"
2189 libopenjpeg_decoder_deps="libopenjpeg"
2190 libopenjpeg_encoder_deps="libopenjpeg"
2191 libopus_decoder_deps="libopus"
2192 libopus_encoder_deps="libopus"
2193 libopus_encoder_select="audio_frame_queue"
2194 libschroedinger_decoder_deps="libschroedinger"
2195 libschroedinger_encoder_deps="libschroedinger"
2196 libspeex_decoder_deps="libspeex"
2197 libspeex_encoder_deps="libspeex"
2198 libspeex_encoder_select="audio_frame_queue"
2199 libtheora_encoder_deps="libtheora"
2200 libtwolame_encoder_deps="libtwolame"
2201 libvo_aacenc_encoder_deps="libvo_aacenc"
2202 libvo_aacenc_encoder_select="audio_frame_queue"
2203 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2204 libvorbis_encoder_deps="libvorbis"
2205 libvorbis_encoder_select="audio_frame_queue"
2206 libvpx_vp8_decoder_deps="libvpx"
2207 libvpx_vp8_encoder_deps="libvpx"
2208 libvpx_vp9_decoder_deps="libvpx"
2209 libvpx_vp9_encoder_deps="libvpx"
2210 libwavpack_encoder_deps="libwavpack"
2211 libwebp_encoder_deps="libwebp"
2212 libx262_encoder_deps="libx262"
2213 libx264_encoder_deps="libx264"
2214 libx265_encoder_deps="libx265"
2215 libxavs_encoder_deps="libxavs"
2216 libxvid_encoder_deps="libxvid"
2217
2218 # demuxers / muxers
2219 ac3_demuxer_select="ac3_parser"
2220 asf_demuxer_select="riffdec"
2221 asf_muxer_select="riffenc"
2222 asf_stream_muxer_select="asf_muxer"
2223 avi_demuxer_select="iso_media riffdec"
2224 avi_muxer_select="riffenc"
2225 avisynth_demuxer_deps="avisynth"
2226 avisynth_demuxer_select="riffdec"
2227 caf_demuxer_select="iso_media riffdec"
2228 dash_muxer_select="mp4_muxer"
2229 dirac_demuxer_select="dirac_parser"
2230 dv_demuxer_select="dvprofile"
2231 dv_muxer_select="dvprofile"
2232 dxa_demuxer_select="riffdec"
2233 eac3_demuxer_select="ac3_parser"
2234 f4v_muxer_select="mov_muxer"
2235 flac_demuxer_select="flac_parser"
2236 hds_muxer_select="flv_muxer"
2237 hls_muxer_select="mpegts_muxer"
2238 ipod_muxer_select="mov_muxer"
2239 ismv_muxer_select="mov_muxer"
2240 matroska_audio_muxer_select="matroska_muxer"
2241 matroska_demuxer_select="iso_media riffdec"
2242 matroska_demuxer_suggest="bzlib lzo zlib"
2243 matroska_muxer_select="iso_media riffenc"
2244 mmf_muxer_select="riffenc"
2245 mov_demuxer_select="iso_media riffdec"
2246 mov_demuxer_suggest="zlib"
2247 mov_muxer_select="iso_media riffenc rtpenc_chain"
2248 mp3_demuxer_select="mpegaudio_parser"
2249 mp4_muxer_select="mov_muxer"
2250 mpegts_demuxer_select="iso_media"
2251 mpegts_muxer_select="adts_muxer latm_muxer"
2252 mpegtsraw_demuxer_select="mpegts_demuxer"
2253 mxf_d10_muxer_select="mxf_muxer"
2254 nut_muxer_select="riffenc"
2255 nuv_demuxer_select="riffdec"
2256 oga_muxer_select="ogg_muxer"
2257 ogg_demuxer_select="dirac_parse"
2258 opus_muxer_select="ogg_muxer"
2259 psp_muxer_select="mov_muxer"
2260 rtp_demuxer_select="sdp_demuxer"
2261 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2262 rtsp_demuxer_select="http_protocol rtpdec"
2263 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2264 sap_demuxer_select="sdp_demuxer"
2265 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2266 sdp_demuxer_select="rtpdec"
2267 smoothstreaming_muxer_select="ismv_muxer"
2268 spdif_muxer_select="aac_parser"
2269 spx_muxer_select="ogg_muxer"
2270 swf_demuxer_suggest="zlib"
2271 tak_demuxer_select="tak_parser"
2272 tg2_muxer_select="mov_muxer"
2273 tgp_muxer_select="mov_muxer"
2274 w64_demuxer_select="wav_demuxer"
2275 wav_demuxer_select="riffdec"
2276 wav_muxer_select="riffenc"
2277 webm_muxer_select="iso_media riffenc"
2278 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2279 wtv_demuxer_select="mpegts_demuxer riffdec"
2280 xmv_demuxer_select="riffdec"
2281 xwma_demuxer_select="riffdec"
2282
2283 # indevs / outdevs
2284 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2285 alsa_outdev_deps="alsa_asoundlib_h"
2286 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2287 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2288 dv1394_indev_deps="dv1394"
2289 dv1394_indev_select="dv_demuxer"
2290 fbdev_indev_deps="linux_fb_h"
2291 jack_indev_deps="jack_jack_h pthreads"
2292 libcdio_indev_deps="libcdio"
2293 libdc1394_indev_deps="libdc1394"
2294 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2295 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2296 pulse_indev_deps="libpulse"
2297 sndio_indev_deps="sndio_h"
2298 sndio_outdev_deps="sndio_h"
2299 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2300 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2301 vfwcap_indev_extralibs="-lavicap32"
2302 x11grab_indev_deps="x11grab"
2303 x11grab_xcb_indev_deps="libxcb"
2304
2305 # protocols
2306 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2307 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2308 ffrtmpcrypt_protocol_select="tcp_protocol"
2309 ffrtmphttp_protocol_deps="!librtmp_protocol"
2310 ffrtmphttp_protocol_select="http_protocol"
2311 gopher_protocol_select="network"
2312 http_protocol_select="tcp_protocol"
2313 httpproxy_protocol_select="tcp_protocol"
2314 https_protocol_select="tls_protocol"
2315 icecast_protocol_select="http_protocol"
2316 librtmp_protocol_deps="librtmp"
2317 librtmpe_protocol_deps="librtmp"
2318 librtmps_protocol_deps="librtmp"
2319 librtmpt_protocol_deps="librtmp"
2320 librtmpte_protocol_deps="librtmp"
2321 mmsh_protocol_select="http_protocol"
2322 mmst_protocol_select="network"
2323 rtmp_protocol_deps="!librtmp_protocol"
2324 rtmp_protocol_select="tcp_protocol"
2325 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2326 rtmps_protocol_deps="!librtmp_protocol"
2327 rtmps_protocol_select="tls_protocol"
2328 rtmpt_protocol_select="ffrtmphttp_protocol"
2329 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2330 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2331 rtp_protocol_select="udp_protocol"
2332 sctp_protocol_deps="struct_sctp_event_subscribe"
2333 sctp_protocol_select="network"
2334 srtp_protocol_select="rtp_protocol srtp"
2335 tcp_protocol_select="network"
2336 tls_gnutls_protocol_deps="gnutls"
2337 tls_gnutls_protocol_select="tcp_protocol"
2338 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2339 tls_openssl_protocol_select="tcp_protocol"
2340 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2341 udp_protocol_select="network"
2342 unix_protocol_deps="sys_un_h"
2343 unix_protocol_select="network"
2344
2345 # filters
2346 blackframe_filter_deps="gpl"
2347 boxblur_filter_deps="gpl"
2348 bs2b_filter_deps="libbs2b"
2349 cropdetect_filter_deps="gpl"
2350 delogo_filter_deps="gpl"
2351 drawtext_filter_deps="libfreetype"
2352 frei0r_filter_deps="frei0r dlopen"
2353 frei0r_filter_extralibs='$ldl'
2354 frei0r_src_filter_deps="frei0r dlopen"
2355 frei0r_src_filter_extralibs='$ldl'
2356 hqdn3d_filter_deps="gpl"
2357 hwupload_cuda_filter_deps="cuda"
2358 interlace_filter_deps="gpl"
2359 ocv_filter_deps="libopencv"
2360 resample_filter_deps="avresample"
2361 scale_filter_deps="swscale"
2362
2363 # examples
2364 avcodec_example_deps="avcodec avutil"
2365 filter_audio_example_deps="avfilter avutil"
2366 metadata_example_deps="avformat avutil"
2367 output_example_deps="avcodec avformat avutil swscale"
2368 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2369 transcode_aac_example_deps="avcodec avformat avresample"
2370
2371 # libraries, in linking order
2372 avcodec_deps="avutil"
2373 avdevice_deps="avformat avcodec avutil"
2374 avfilter_deps="avutil"
2375 avformat_deps="avcodec avutil"
2376 avresample_deps="avutil"
2377 swscale_deps="avutil"
2378
2379 # programs
2380 avconv_deps="avcodec avfilter avformat avresample swscale"
2381 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2382                fps_filter null_filter resample_filter scale_filter
2383                setpts_filter trim_filter"
2384 avplay_deps="avcodec avfilter avformat avresample sdl"
2385 avplay_libs='$sdl_libs'
2386 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2387 avprobe_deps="avcodec avformat"
2388
2389 # documentation
2390 pod2man_deps="doc"
2391 texi2html_deps="doc"
2392
2393 # default parameters
2394
2395 logfile="config.log"
2396
2397 # installation paths
2398 prefix_default="/usr/local"
2399 bindir_default='${prefix}/bin'
2400 datadir_default='${prefix}/share/avconv'
2401 docdir_default='${prefix}/share/doc/libav'
2402 incdir_default='${prefix}/include'
2403 libdir_default='${prefix}/lib'
2404 mandir_default='${prefix}/share/man'
2405 shlibdir_default="$libdir_default"
2406
2407 # toolchain
2408 ar_default="ar"
2409 cc_default="gcc"
2410 host_cc_default="gcc"
2411 cp_f="cp -f"
2412 ln_s="ln -s -f"
2413 nm_default="nm -g"
2414 objformat="elf"
2415 pkg_config_default=pkg-config
2416 ranlib="ranlib"
2417 strip="strip"
2418 yasmexe="yasm"
2419
2420 # machine
2421 arch_default=$(uname -m)
2422 cpu="generic"
2423 intrinsics="none"
2424
2425 # OS
2426 target_os_default=$(tolower $(uname -s))
2427 host_os=$target_os_default
2428
2429 # configurable options
2430 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2431
2432 enable asm
2433 enable debug
2434 enable doc
2435 enable faan faandct faanidct
2436 enable optimizations
2437 enable safe_bitstream_reader
2438 enable static
2439 enable swscale_alpha
2440 enable valgrind_backtrace
2441
2442 # By default, enable only those hwaccels that have no external dependencies.
2443 enable d3d11va dxva2 vda vdpau
2444
2445 # build settings
2446 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2447 LIBPREF="lib"
2448 LIBSUF=".a"
2449 FULLNAME='$(NAME)$(BUILDSUF)'
2450 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2451 SLIBPREF="lib"
2452 SLIBSUF=".so"
2453 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2454 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2455 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2456 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2457 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2458 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2459
2460 asflags_filter=echo
2461 cflags_filter=echo
2462 ldflags_filter=echo
2463
2464 AS_C='-c'
2465 AS_O='-o $@'
2466 CC_C='-c'
2467 CC_E='-E -o $@'
2468 CC_O='-o $@'
2469 OBJCC_C='-c'
2470 OBJCC_E='-E -o $@'
2471 OBJCC_O='-o $@'
2472 LD_O='-o $@'
2473 LD_LIB='-l%'
2474 LD_PATH='-L'
2475 HOSTCC_C='-c'
2476 HOSTCC_E='-E -o $@'
2477 HOSTCC_O='-o $@'
2478 HOSTLD_O='-o $@'
2479
2480 host_libs='-lm'
2481 host_cflags_filter=echo
2482 host_ldflags_filter=echo
2483
2484 target_path='$(CURDIR)'
2485
2486 # since the object filename is not given with the -MM flag, the compiler
2487 # is only able to print the basename, and we must add the path ourselves
2488 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2489 DEPFLAGS='-MM'
2490
2491 # find source path
2492 if test -f configure; then
2493     source_path=.
2494 else
2495     source_path=$(cd $(dirname "$0"); pwd)
2496     echo "$source_path" | grep -q '[[:blank:]]' &&
2497         die "Out of tree builds are impossible with whitespace in source path."
2498     test -e "$source_path/config.h" &&
2499         die "Out of tree builds are impossible with config.h in source dir."
2500 fi
2501
2502 for v in "$@"; do
2503     r=${v#*=}
2504     l=${v%"$r"}
2505     r=$(sh_quote "$r")
2506     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2507 done
2508
2509 find_things(){
2510     thing=$1
2511     pattern=$2
2512     file=$source_path/$3
2513     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2514 }
2515
2516 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2517 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2518 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2519 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2520 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2521 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2522 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2523 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2524 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2525
2526 find_things_extern(){
2527     thing=$1
2528     pattern=$2
2529     file=$source_path/$3
2530     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2531 }
2532
2533 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2534 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2535
2536 ALL_COMPONENTS="
2537     $BSF_LIST
2538     $DECODER_LIST
2539     $DEMUXER_LIST
2540     $ENCODER_LIST
2541     $FILTER_LIST
2542     $HWACCEL_LIST
2543     $INDEV_LIST
2544     $MUXER_LIST
2545     $OUTDEV_LIST
2546     $PARSER_LIST
2547     $PROTOCOL_LIST
2548 "
2549
2550 for n in $COMPONENT_LIST; do
2551     v=$(toupper ${n%s})_LIST
2552     eval enable \$$v
2553     eval ${n}_if_any="\$$v"
2554 done
2555
2556 enable $ARCH_EXT_LIST
2557
2558 die_unknown(){
2559     echo "Unknown option \"$1\"."
2560     echo "See $0 --help for available options."
2561     exit 1
2562 }
2563
2564 print_3_columns() {
2565     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2566 }
2567
2568 show_list() {
2569     suffix=_$1
2570     shift
2571     echo $* | sed s/$suffix//g | print_3_columns
2572     exit 0
2573 }
2574
2575 rand_list(){
2576     IFS=', '
2577     set -- $*
2578     unset IFS
2579     for thing; do
2580         comp=${thing%:*}
2581         prob=${thing#$comp}
2582         prob=${prob#:}
2583         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2584         echo "prob ${prob:-0.5}"
2585         printf '%s\n' $comp
2586     done
2587 }
2588
2589 do_random(){
2590     action=$1
2591     shift
2592     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2593     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2594 }
2595
2596 for opt do
2597     optval="${opt#*=}"
2598     case "$opt" in
2599         --extra-ldflags=*)
2600             add_ldflags $optval
2601         ;;
2602         --extra-ldexeflags=*)
2603             add_ldexeflags $optval
2604         ;;
2605         --extra-libs=*)
2606             add_extralibs $optval
2607         ;;
2608         --disable-devices)
2609             disable $INDEV_LIST $OUTDEV_LIST
2610         ;;
2611         --enable-debug=*)
2612             debuglevel="$optval"
2613         ;;
2614         --disable-programs)
2615             disable $PROGRAM_LIST
2616         ;;
2617         --disable-everything)
2618             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2619         ;;
2620         --disable-all)
2621             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2622             disable $LIBRARY_LIST $PROGRAM_LIST doc
2623         ;;
2624         --enable-random|--disable-random)
2625             action=${opt%%-random}
2626             do_random ${action#--} $COMPONENT_LIST
2627         ;;
2628         --enable-random=*|--disable-random=*)
2629             action=${opt%%-random=*}
2630             do_random ${action#--} $optval
2631         ;;
2632         --enable-*=*|--disable-*=*)
2633             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2634             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2635             eval list=\$$(toupper $thing)_LIST
2636             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2637             $action $(filter "$name" $list)
2638         ;;
2639         --enable-avserver|--disable-avserver*)
2640             warn "avserver has been removed, the ${opt} option is only"\
2641                  "provided for compatibility and will be removed in the future"
2642         ;;
2643         --enable-?*|--disable-?*)
2644             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2645             if is_in $option $COMPONENT_LIST; then
2646                 test $action = disable && action=unset
2647                 eval $action \$$(toupper ${option%s})_LIST
2648             elif is_in $option $CMDLINE_SELECT; then
2649                 $action $option
2650             else
2651                 die_unknown $opt
2652             fi
2653         ;;
2654         --list-*)
2655             NAME="${opt#--list-}"
2656             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2657             NAME=${NAME%s}
2658             eval show_list $NAME \$$(toupper $NAME)_LIST
2659         ;;
2660         --help|-h) show_help
2661         ;;
2662         *)
2663             optname="${opt%%=*}"
2664             optname="${optname#--}"
2665             optname=$(echo "$optname" | sed 's/-/_/g')
2666             if is_in $optname $CMDLINE_SET; then
2667                 eval $optname='$optval'
2668             elif is_in $optname $CMDLINE_APPEND; then
2669                 append $optname "$optval"
2670             else
2671                 die_unknown $opt
2672             fi
2673         ;;
2674     esac
2675 done
2676
2677 for e in $env; do
2678     eval "export $e"
2679 done
2680
2681 disabled logging && logfile=/dev/null
2682
2683 # Disable all the library-specific components if the library itself
2684 # is disabled, see AVCODEC_LIST and following _LIST variables.
2685
2686 disable_components(){
2687     disabled ${1} && disable $(
2688         eval components="\$$(toupper ${1})_COMPONENTS"
2689         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2690     )
2691 }
2692
2693 map 'disable_components $v' $LIBRARY_LIST
2694
2695 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2696 set >> $logfile
2697
2698 case "$toolchain" in
2699     *-asan)
2700         cc_default="${toolchain%-asan}"
2701         add_cflags  -fsanitize=address
2702         add_ldflags -fsanitize=address
2703     ;;
2704     *-msan)
2705         cc_default="${toolchain%-msan}"
2706         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2707         add_ldflags -fsanitize=memory
2708     ;;
2709     *-tsan)
2710         cc_default="${toolchain%-tsan}"
2711         add_cflags  -fsanitize=thread -pie
2712         add_ldflags -fsanitize=thread -pie
2713         case "$toolchain" in
2714             gcc-tsan)
2715                 add_cflags  -fPIC
2716                 add_ldflags -fPIC
2717                 ;;
2718         esac
2719     ;;
2720     *-usan)
2721         cc_default="${toolchain%-usan}"
2722         add_cflags  -fsanitize=undefined
2723         add_ldflags -fsanitize=undefined
2724         case "$toolchain" in
2725             clang-usan)
2726                 add_cflags -O1
2727                 ;;
2728         esac
2729     ;;
2730     valgrind-*)
2731         target_exec_default="valgrind"
2732         case "$toolchain" in
2733             valgrind-massif)
2734                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2735                 ;;
2736             valgrind-memcheck)
2737                 target_exec_args="--track-origins=yes --leak-check=full"
2738                 ;;
2739         esac
2740     ;;
2741     msvc)
2742         # Check whether the current MSVC version needs the C99 converter.
2743         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2744         # support enough of C99 to build libav. Default to the new
2745         # behaviour if the regexp was unable to match anything, since this
2746         # successfully parses the version number of existing supported
2747         # versions that require the converter (MSVC 2010 and 2012).
2748         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2749         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2750             cc_default="cl"
2751         else
2752             cc_default="c99wrap cl"
2753         fi
2754         ld_default="$source_path/compat/windows/mslink"
2755         nm_default="dumpbin -symbols"
2756         ar_default="lib"
2757         case "$arch" in
2758         arm*)
2759             as_default="armasm"
2760             ;;
2761         esac
2762         target_os_default="win32"
2763         # Use a relative path for TMPDIR. This makes sure all the
2764         # ffconf temp files are written with a relative path, avoiding
2765         # issues with msys/win32 path conversion for MSVC parameters
2766         # such as -Fo<file> or -out:<file>.
2767         TMPDIR=.
2768     ;;
2769     icl)
2770         cc_default="icl"
2771         ld_default="xilink"
2772         nm_default="dumpbin -symbols"
2773         ar_default="xilib"
2774         target_os_default="win32"
2775         TMPDIR=.
2776     ;;
2777     gcov)
2778         add_cflags  -fprofile-arcs -ftest-coverage
2779         add_ldflags -fprofile-arcs -ftest-coverage
2780     ;;
2781     llvm-cov)
2782         add_cflags -fprofile-arcs -ftest-coverage
2783         add_ldflags --coverage
2784     ;;
2785     hardened)
2786         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2787         add_cflags   -fno-strict-overflow -fstack-protector-all
2788         add_ldflags  -Wl,-z,relro -Wl,-z,now
2789     ;;
2790     ?*)
2791         die "Unknown toolchain $toolchain"
2792     ;;
2793 esac
2794
2795 test -n "$cross_prefix" && enable cross_compile
2796
2797 if enabled cross_compile; then
2798     test -n "$arch" && test -n "$target_os" ||
2799         die "Must specify target arch and OS when cross-compiling"
2800 fi
2801
2802 ar_default="${cross_prefix}${ar_default}"
2803 cc_default="${cross_prefix}${cc_default}"
2804 occ_default="${cross_prefix}${occ_default}"
2805 nm_default="${cross_prefix}${nm_default}"
2806 pkg_config_default="${cross_prefix}${pkg_config_default}"
2807 ranlib="${cross_prefix}${ranlib}"
2808 strip="${cross_prefix}${strip}"
2809
2810 sysinclude_default="${sysroot}/usr/include"
2811
2812 set_default arch cc pkg_config sysinclude target_exec target_os
2813 enabled cross_compile || host_cc_default=$cc
2814 set_default host_cc
2815
2816 if ! $pkg_config --version >/dev/null 2>&1; then
2817     warn "$pkg_config not found, library detection may fail."
2818     pkg_config=false
2819 fi
2820
2821 exesuf() {
2822     case $1 in
2823         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2824     esac
2825 }
2826
2827 EXESUF=$(exesuf $target_os)
2828 HOSTEXESUF=$(exesuf $host_os)
2829
2830 # set temporary file name
2831 : ${TMPDIR:=$TEMPDIR}
2832 : ${TMPDIR:=$TMP}
2833 : ${TMPDIR:=/tmp}
2834
2835 if ! check_cmd mktemp -u XXXXXX; then
2836     # simple replacement for missing mktemp
2837     # NOT SAFE FOR GENERAL USE
2838     mktemp(){
2839         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2840     }
2841 fi
2842
2843 tmpfile(){
2844     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2845         (set -C; exec > $tmp) 2>/dev/null ||
2846         die "Unable to create temporary file in $TMPDIR."
2847     append TMPFILES $tmp
2848     eval $1=$tmp
2849 }
2850
2851 trap 'rm -f -- $TMPFILES' EXIT
2852
2853 tmpfile TMPASM .asm
2854 tmpfile TMPC   .c
2855 tmpfile TMPE   $EXESUF
2856 tmpfile TMPH   .h
2857 tmpfile TMPO   .o
2858 tmpfile TMPS   .S
2859 tmpfile TMPSH  .sh
2860 tmpfile TMPV   .ver
2861
2862 unset -f mktemp
2863
2864 chmod +x $TMPE
2865
2866 # make sure we can execute files in $TMPDIR
2867 cat > $TMPSH 2>> $logfile <<EOF
2868 #! /bin/sh
2869 EOF
2870 chmod +x $TMPSH >> $logfile 2>&1
2871 if ! $TMPSH >> $logfile 2>&1; then
2872     cat <<EOF
2873 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2874 variable to another directory and make sure that it is not mounted noexec.
2875 EOF
2876     die "Sanity test failed."
2877 fi
2878
2879 armasm_flags(){
2880     for flag; do
2881         case $flag in
2882             # Filter out MSVC cl.exe options from cflags that shouldn't
2883             # be passed to gas-preprocessor
2884             -M[TD]*)                                            ;;
2885             *)                  echo $flag                      ;;
2886         esac
2887    done
2888 }
2889
2890 ccc_flags(){
2891     for flag; do
2892         case $flag in
2893             -std=c99)           echo -c99                       ;;
2894             -mcpu=*)            echo -arch ${flag#*=}           ;;
2895             -mieee)             echo -ieee                      ;;
2896             -O*|-fast)          echo $flag                      ;;
2897             -fno-math-errno)    echo -assume nomath_errno       ;;
2898             -g)                 echo -g3                        ;;
2899             -Wall)              echo -msg_enable level2         ;;
2900             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2901             -Wl,*)              echo $flag                      ;;
2902             -f*|-W*)                                            ;;
2903             *)                  echo $flag                      ;;
2904         esac
2905    done
2906 }
2907
2908 cparser_flags(){
2909     for flag; do
2910         case $flag in
2911             -Wno-switch)             echo -Wno-switch-enum ;;
2912             -Wno-format-zero-length) ;;
2913             -Wdisabled-optimization) ;;
2914             -Wno-pointer-sign)       echo -Wno-other ;;
2915             *)                       echo $flag ;;
2916         esac
2917     done
2918 }
2919
2920 msvc_common_flags(){
2921     for flag; do
2922         case $flag in
2923             # In addition to specifying certain flags under the compiler
2924             # specific filters, they must be specified here as well or else the
2925             # generic catch all at the bottom will print the original flag.
2926             -Wall)                ;;
2927             -std=c99)             ;;
2928             # Common flags
2929             -fomit-frame-pointer) ;;
2930             -g)                   echo -Z7 ;;
2931             -fno-math-errno)      ;;
2932             -fno-common)          ;;
2933             -fno-signed-zeros)    ;;
2934             -fPIC)                ;;
2935             -mthumb)              ;;
2936             -march=*)             ;;
2937             -lz)                  echo zlib.lib ;;
2938             -lavifil32)           echo vfw32.lib ;;
2939             -lavicap32)           echo vfw32.lib user32.lib ;;
2940             -lx264)               echo libx264.lib ;;
2941             -l*)                  echo ${flag#-l}.lib ;;
2942             -L*)                  echo -libpath:${flag#-L} ;;
2943             *)                    echo $flag ;;
2944         esac
2945     done
2946 }
2947
2948 msvc_flags(){
2949     msvc_common_flags "$@"
2950     for flag; do
2951         case $flag in
2952             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2953                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2954                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2955                                        -wd4273 -wd4554 -wd4701 ;;
2956         esac
2957     done
2958 }
2959
2960 icl_flags(){
2961     msvc_common_flags "$@"
2962     for flag; do
2963         case $flag in
2964             # Despite what Intel's documentation says -Wall, which is supported
2965             # on Windows, does enable remarks so disable them here.
2966             -Wall)                echo $flag -Qdiag-disable:remark ;;
2967             -std=c99)             echo -Qstd=c99 ;;
2968         esac
2969     done
2970 }
2971
2972 pgi_flags(){
2973     for flag; do
2974         case $flag in
2975             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2976             -fomit-frame-pointer) echo -Mnoframe ;;
2977             -g)                   echo -gopt ;;
2978             *)                    echo $flag ;;
2979         esac
2980     done
2981 }
2982
2983 suncc_flags(){
2984     for flag; do
2985         case $flag in
2986             -march=*|-mcpu=*)
2987                 case "${flag#*=}" in
2988                     native)                   echo -xtarget=native       ;;
2989                     v9|niagara)               echo -xarch=sparc          ;;
2990                     ultrasparc)               echo -xarch=sparcvis       ;;
2991                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2992                     i586|pentium)             echo -xchip=pentium        ;;
2993                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2994                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2995                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2996                     pentium4*)          echo -xtarget=pentium4           ;;
2997                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2998                     *-sse3)             echo -xarch=sse3                 ;;
2999                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3000                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3001                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3002                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3003                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3004                     k8|opteron|athlon64|athlon-fx)
3005                                                echo -xarch=sse2a         ;;
3006                     athlon*)                   echo -xarch=pentium_proa  ;;
3007                 esac
3008                 ;;
3009             -std=c99)             echo -xc99              ;;
3010             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3011             -fPIC)                echo -KPIC -xcode=pic32 ;;
3012             -W*,*)                echo $flag              ;;
3013             -f*-*|-W*|-mimpure-text)                      ;;
3014             -shared)              echo -G                 ;;
3015             *)                    echo $flag              ;;
3016         esac
3017     done
3018 }
3019
3020 tms470_flags(){
3021     for flag; do
3022         case $flag in
3023             -march=*|-mcpu=*)
3024                 case "${flag#*=}" in
3025                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3026                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3027                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3028                     armv6*|arm11*)          echo -mv=6   ;;
3029                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3030                                             echo -mv=5e  ;;
3031                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3032                 esac
3033                 ;;
3034             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3035             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3036             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3037             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3038             -msoft-float)   echo --float_support=vfplib       ;;
3039             -O[0-3]|-mf=*)  echo $flag                        ;;
3040             -g)             echo -g -mn                       ;;
3041             -pds=*)         echo $flag                        ;;
3042             -D*|-I*)        echo $flag                        ;;
3043             --gcc|--abi=*)  echo $flag                        ;;
3044             -me)            echo $flag                        ;;
3045         esac
3046     done
3047 }
3048
3049 probe_cc(){
3050     pfx=$1
3051     _cc=$2
3052
3053     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3054     unset _ld_o _ldflags _ld_lib _ld_path
3055     unset _depflags _DEPCMD _DEPFLAGS
3056     _flags_filter=echo
3057
3058     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3059         _type=llvm_gcc
3060         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3061         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3062         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3063         _cflags_speed='-O3'
3064         _cflags_size='-Os'
3065     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3066         _type=gcc
3067         gcc_version=$($_cc --version | head -n1)
3068         gcc_basever=$($_cc -dumpversion)
3069         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3070         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3071         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3072         if ! $_cc -dumpversion | grep -q '^2\.'; then
3073             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3074         fi
3075         _cflags_speed='-O3'
3076         _cflags_size='-Os'
3077     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3078         _type=icc
3079         _ident=$($_cc --version | head -n1)
3080         _depflags='-MMD'
3081         _cflags_speed='-O3'
3082         _cflags_size='-Os'
3083         _cflags_noopt='-O1'
3084     elif $_cc -v 2>&1 | grep -q xlc; then
3085         _type=xlc
3086         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3087         _cflags_speed='-O5'
3088         _cflags_size='-O5 -qcompact'
3089     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3090         _type=ccc
3091         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3092         _DEPFLAGS='-M'
3093         _cflags_speed='-fast'
3094         _cflags_size='-O1'
3095         _flags_filter=ccc_flags
3096     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3097         test -d "$sysroot" || die "No valid sysroot specified."
3098         _type=armcc
3099         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3100         armcc_conf="$PWD/armcc.conf"
3101         $_cc --arm_linux_configure                 \
3102              --arm_linux_config_file="$armcc_conf" \
3103              --configure_sysroot="$sysroot"        \
3104              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3105              die "Error creating armcc configuration file."
3106         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3107         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3108         as_default="${cross_prefix}gcc"
3109         _depflags='-MMD'
3110         _cflags_speed='-O3'
3111         _cflags_size='-Os'
3112     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3113         _type=tms470
3114         _ident=$($_cc -version | head -n1 | tr -s ' ')
3115         _flags='--gcc --abi=eabi -me'
3116         _cc_e='-ppl -fe=$@'
3117         _cc_o='-fe=$@'
3118         _depflags='-ppa -ppd=$(@:.o=.d)'
3119         _cflags_speed='-O3 -mf=5'
3120         _cflags_size='-O3 -mf=2'
3121         _flags_filter=tms470_flags
3122     elif $_cc -v 2>&1 | grep -q clang; then
3123         _type=clang
3124         _ident=$($_cc --version 2>/dev/null | head -n1)
3125         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3126         _cflags_speed='-O3'
3127         _cflags_size='-Os'
3128     elif $_cc -V 2>&1 | grep -q Sun; then
3129         _type=suncc
3130         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3131         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3132         _DEPFLAGS='-xM1 -xc99'
3133         _ldflags='-std=c99'
3134         _cflags_speed='-O5'
3135         _cflags_size='-O5 -xspace'
3136         _flags_filter=suncc_flags
3137     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3138         _type=pathscale
3139         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3140         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3141         _cflags_speed='-O2'
3142         _cflags_size='-Os'
3143         _flags_filter='filter_out -Wdisabled-optimization'
3144     elif $_cc -v 2>&1 | grep -q Open64; then
3145         _type=open64
3146         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3147         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3148         _cflags_speed='-O2'
3149         _cflags_size='-Os'
3150         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3151     elif $_cc -V 2>&1 | grep -q Portland; then
3152         _type=pgi
3153         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3154         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3155         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3156         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3157         _cflags_noopt="-O1"
3158         _flags_filter=pgi_flags
3159     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3160         _type=armasm
3161         _ident=$($_cc | head -n1)
3162         # 4509: "This form of conditional instruction is deprecated"
3163         _flags="-nologo -ignore 4509"
3164         _flags_filter=armasm_flags
3165     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3166         _type=msvc
3167         _ident=$($_cc 2>&1 | head -n1)
3168         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3169         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3170         _cflags_speed="-O2"
3171         _cflags_size="-O1"
3172         if $_cc -nologo- 2>&1 | grep -q Linker; then
3173             _ld_o='-out:$@'
3174         else
3175             _ld_o='-Fe$@'
3176         fi
3177         _cc_o='-Fo$@'
3178         _cc_e='-P -Fi$@'
3179         _flags_filter=msvc_flags
3180         _ld_lib='lib%.a'
3181         _ld_path='-libpath:'
3182         _flags='-nologo'
3183         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3184     elif $_cc 2>&1 | grep -q Intel; then
3185         _type=icl
3186         _ident=$($_cc 2>&1 | head -n1)
3187         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3188         # Not only is O3 broken on 13.x+ but it is slower on all previous
3189         # versions (tested) as well.
3190         _cflags_speed="-O2"
3191         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3192         if $_cc 2>&1 | grep -q Linker; then
3193             _ld_o='-out:$@'
3194         else
3195             _ld_o='-Fe$@'
3196         fi
3197         _cc_o='-Fo$@'
3198         _cc_e='-P'
3199         _flags_filter=icl_flags
3200         _ld_lib='lib%.a'
3201         _ld_path='-libpath:'
3202         # -Qdiag-error to make icl error when seeing certain unknown arguments
3203         _flags='-nologo -Qdiag-error:4044,10157'
3204         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3205         # with MSVC which enables it by default.
3206         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3207     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3208         _type=cparser
3209         _ident=$($_cc --version | head -n1)
3210         _depflags='-MMD'
3211         _cflags_speed='-O4'
3212         _cflags_size='-O2'
3213         _flags_filter=cparser_flags
3214     fi
3215
3216     eval ${pfx}_type=\$_type
3217     eval ${pfx}_ident=\$_ident
3218 }
3219
3220 set_ccvars(){
3221     eval ${1}_C=\${_cc_c-\${${1}_C}}
3222     eval ${1}_E=\${_cc_e-\${${1}_E}}
3223     eval ${1}_O=\${_cc_o-\${${1}_O}}
3224
3225     if [ -n "$_depflags" ]; then
3226         eval ${1}_DEPFLAGS=\$_depflags
3227     else
3228         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3229         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3230         eval DEP${1}FLAGS=\$_flags
3231     fi
3232 }
3233
3234 probe_cc cc "$cc"
3235 cflags_filter=$_flags_filter
3236 cflags_speed=$_cflags_speed
3237 cflags_size=$_cflags_size
3238 cflags_noopt=$_cflags_noopt
3239 add_cflags $_flags $_cflags
3240 cc_ldflags=$_ldflags
3241 set_ccvars CC
3242
3243 probe_cc hostcc "$host_cc"
3244 host_cflags_filter=$_flags_filter
3245 add_host_cflags  $_flags $_cflags
3246 set_ccvars HOSTCC
3247
3248 test -n "$cc_type" && enable $cc_type ||
3249     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3250
3251 : ${as_default:=$cc}
3252 : ${objcc_default:=$cc}
3253 : ${dep_cc_default:=$cc}
3254 : ${ld_default:=$cc}
3255 : ${host_ld_default:=$host_cc}
3256 set_default ar as objcc dep_cc ld host_ld
3257
3258 probe_cc as "$as"
3259 asflags_filter=$_flags_filter
3260 add_asflags $_flags $_cflags
3261 set_ccvars AS
3262
3263 probe_cc objcc "$objcc"
3264 objcflags_filter=$_flags_filter
3265 add_objcflags $_flags $_cflags
3266 set_ccvars OBJC
3267
3268 probe_cc ld "$ld"
3269 ldflags_filter=$_flags_filter
3270 add_ldflags $_flags $_ldflags
3271 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3272 LD_O=${_ld_o-$LD_O}
3273 LD_LIB=${_ld_lib-$LD_LIB}
3274 LD_PATH=${_ld_path-$LD_PATH}
3275
3276 probe_cc hostld "$host_ld"
3277 host_ldflags_filter=$_flags_filter
3278 add_host_ldflags $_flags $_ldflags
3279 HOSTLD_O=${_ld_o-$HOSTLD_O}
3280
3281 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3282     probe_cc depcc "$dep_cc"
3283     CCDEP=${_DEPCMD:-$DEPCMD}
3284     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3285     DEPCCFLAGS=$_flags
3286 fi
3287
3288 if $ar 2>&1 | grep -q Microsoft; then
3289     arflags="-nologo"
3290     ar_o='-out:$@'
3291 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3292     arflags="rq"
3293     ar_o='$@'
3294 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3295     arflags='-Xany -r -c'
3296     ar_o='$@'
3297 else
3298     arflags="rc"
3299     ar_o='$@'
3300 fi
3301
3302 add_cflags $extra_cflags
3303 add_objcflags $extra_objcflags
3304 add_asflags $extra_cflags
3305
3306 if test -n "$sysroot"; then
3307     case "$cc_type" in
3308         gcc|llvm_gcc|clang)
3309             add_cppflags --sysroot="$sysroot"
3310             add_ldflags --sysroot="$sysroot"
3311         ;;
3312         tms470)
3313             add_cppflags -I"$sysinclude"
3314             add_ldflags  --sysroot="$sysroot"
3315         ;;
3316     esac
3317 fi
3318
3319 if test "$cpu" = host; then
3320     enabled cross_compile &&
3321         die "--cpu=host makes no sense when cross-compiling."
3322
3323     case "$cc_type" in
3324         gcc|llvm_gcc)
3325             check_native(){
3326                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3327                 sed -n "/cc1.*$1=/{
3328                             s/.*$1=\\([^ ]*\\).*/\\1/
3329                             p
3330                             q
3331                         }" $TMPE
3332             }
3333             cpu=$(check_native -march || check_native -mcpu)
3334         ;;
3335     esac
3336
3337     test "${cpu:-host}" = host &&
3338         die "--cpu=host not supported with compiler $cc"
3339 fi
3340
3341 # Deal with common $arch aliases
3342 case "$arch" in
3343     aarch64|arm64)
3344         arch="aarch64"
3345     ;;
3346     arm*)
3347         arch="arm"
3348     ;;
3349     mips*|IP*)
3350         case "$arch" in
3351         *el)
3352             add_cppflags -EL
3353             add_ldflags -EL
3354         ;;
3355         *eb)
3356             add_cppflags -EB
3357             add_ldflags -EB
3358         ;;
3359         esac
3360         arch="mips"
3361     ;;
3362     parisc*|hppa*)
3363         arch="parisc"
3364     ;;
3365     "Power Macintosh"|ppc*|powerpc*)
3366         arch="ppc"
3367     ;;
3368     s390|s390x)
3369         arch="s390"
3370     ;;
3371     sh4|sh)
3372         arch="sh4"
3373     ;;
3374     sun4u|sparc*)
3375         arch="sparc"
3376     ;;
3377     tilegx|tile-gx)
3378         arch="tilegx"
3379     ;;
3380     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3381         arch="x86"
3382     ;;
3383 esac
3384
3385 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3386 enable $arch
3387
3388 # Add processor-specific flags
3389 if enabled aarch64; then
3390
3391     case $cpu in
3392         armv*)
3393             cpuflags="-march=$cpu"
3394         ;;
3395         *)
3396             cpuflags="-mcpu=$cpu"
3397         ;;
3398     esac
3399
3400 elif enabled alpha; then
3401
3402     cpuflags="-mcpu=$cpu"
3403
3404 elif enabled arm; then
3405
3406     check_arm_arch() {
3407         check_cpp_condition stddef.h \
3408             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3409             $cpuflags
3410     }
3411
3412     probe_arm_arch() {
3413         if   check_arm_arch 4;        then echo armv4;
3414         elif check_arm_arch 4T;       then echo armv4t;
3415         elif check_arm_arch 5;        then echo armv5;
3416         elif check_arm_arch 5E;       then echo armv5e;
3417         elif check_arm_arch 5T;       then echo armv5t;
3418         elif check_arm_arch 5TE;      then echo armv5te;
3419         elif check_arm_arch 5TEJ;     then echo armv5te;
3420         elif check_arm_arch 6;        then echo armv6;
3421         elif check_arm_arch 6J;       then echo armv6j;
3422         elif check_arm_arch 6K;       then echo armv6k;
3423         elif check_arm_arch 6Z;       then echo armv6z;
3424         elif check_arm_arch 6ZK;      then echo armv6zk;
3425         elif check_arm_arch 6T2;      then echo armv6t2;
3426         elif check_arm_arch 7;        then echo armv7;
3427         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3428         elif check_arm_arch 7S;       then echo armv7-a;
3429         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3430         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3431         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3432         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3433         fi
3434     }
3435
3436     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3437
3438     case $cpu in
3439         armv*)
3440             cpuflags="-march=$cpu"
3441             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3442         ;;
3443         *)
3444             cpuflags="-mcpu=$cpu"
3445             case $cpu in
3446                 cortex-a*)                               subarch=armv7a  ;;
3447                 cortex-r*)                               subarch=armv7r  ;;
3448                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3449                 arm11*)                                  subarch=armv6   ;;
3450                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3451                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3452                 *)                             subarch=$(probe_arm_arch) ;;
3453             esac
3454         ;;
3455     esac
3456
3457     case "$subarch" in
3458         armv5t*)    enable fast_clz                ;;
3459         armv[6-8]*) enable fast_clz fast_unaligned ;;
3460     esac
3461
3462 elif enabled avr32; then
3463
3464     case $cpu in
3465         ap7[02]0[0-2])
3466             subarch="avr32_ap"
3467             cpuflags="-mpart=$cpu"
3468         ;;
3469         ap)
3470             subarch="avr32_ap"
3471             cpuflags="-march=$cpu"
3472         ;;
3473         uc3[ab]*)
3474             subarch="avr32_uc"
3475             cpuflags="-mcpu=$cpu"
3476         ;;
3477         uc)
3478             subarch="avr32_uc"
3479             cpuflags="-march=$cpu"
3480         ;;
3481     esac
3482
3483 elif enabled bfin; then
3484
3485     cpuflags="-mcpu=$cpu"
3486
3487 elif enabled mips; then
3488
3489     cpuflags="-march=$cpu"
3490
3491 elif enabled ppc; then
3492
3493     disable ldbrx
3494
3495     case $(tolower $cpu) in
3496         601|ppc601|powerpc601)
3497             cpuflags="-mcpu=601"
3498             disable altivec
3499         ;;
3500         603*|ppc603*|powerpc603*)
3501             cpuflags="-mcpu=603"
3502             disable altivec
3503         ;;
3504         604*|ppc604*|powerpc604*)
3505             cpuflags="-mcpu=604"
3506             disable altivec
3507         ;;
3508         g3|75*|ppc75*|powerpc75*)
3509             cpuflags="-mcpu=750"
3510             disable altivec
3511         ;;
3512         g4|745*|ppc745*|powerpc745*)
3513             cpuflags="-mcpu=7450"
3514             disable vsx
3515         ;;
3516         74*|ppc74*|powerpc74*)
3517             cpuflags="-mcpu=7400"
3518             disable vsx
3519         ;;
3520         g5|970|ppc970|powerpc970)
3521             cpuflags="-mcpu=970"
3522             disable vsx
3523         ;;
3524         power[3-6]*)
3525             cpuflags="-mcpu=$cpu"
3526             disable vsx
3527         ;;
3528         power[7-8]*)
3529             cpuflags="-mcpu=$cpu"
3530             enable ldbrx
3531         ;;
3532         cell)
3533             cpuflags="-mcpu=cell"
3534             enable ldbrx
3535             disable vsx
3536         ;;
3537         e500mc)
3538             cpuflags="-mcpu=e500mc"
3539             disable altivec
3540         ;;
3541         e500v2)
3542             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3543             disable altivec
3544             disable dcbzl
3545         ;;
3546         e500)
3547             cpuflags="-mcpu=8540 -mhard-float"
3548             disable altivec
3549             disable dcbzl
3550         ;;
3551     esac
3552
3553 elif enabled sparc; then
3554
3555     case $cpu in
3556         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3557             cpuflags="-mcpu=$cpu"
3558         ;;
3559         ultrasparc*|niagara[234])
3560             cpuflags="-mcpu=$cpu"
3561         ;;
3562     esac
3563
3564 elif enabled x86; then
3565
3566     case $cpu in
3567         i[345]86|pentium)
3568             cpuflags="-march=$cpu"
3569             disable i686
3570             disable mmx
3571         ;;
3572         # targets that do NOT support nopl and conditional mov (cmov)
3573         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3574             cpuflags="-march=$cpu"
3575             disable i686
3576         ;;
3577         # targets that do support nopl and conditional mov (cmov)
3578         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3579             cpuflags="-march=$cpu"
3580             enable i686
3581             enable fast_cmov
3582         ;;
3583         # targets that do support conditional mov but on which it's slow
3584         pentium4|pentium4m|prescott|nocona)
3585             cpuflags="-march=$cpu"
3586             enable i686
3587             disable fast_cmov
3588         ;;
3589     esac
3590
3591 fi
3592
3593 if [ "$cpu" != generic ]; then
3594     add_cflags  $cpuflags
3595     add_asflags $cpuflags
3596     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3597 fi
3598
3599 # compiler sanity check
3600 check_exec <<EOF
3601 int main(void){ return 0; }
3602 EOF
3603 if test "$?" != 0; then
3604     echo "$cc is unable to create an executable file."
3605     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3606         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3607         echo "Only do this if you know what cross compiling means."
3608     fi
3609     die "C compiler test failed."
3610 fi
3611
3612 add_cppflags -D_ISOC99_SOURCE
3613 check_cflags -std=c99
3614 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3615 #include <stdlib.h>
3616 EOF
3617 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3618 #include <stdlib.h>
3619 EOF
3620
3621 add_host_cppflags -D_ISOC99_SOURCE
3622 check_host_cflags -std=c99
3623 check_host_cflags -Wall
3624 check_host_cflags -O3
3625
3626 check_64bit(){
3627     arch32=$1
3628     arch64=$2
3629     expr=$3
3630     check_code cc "" "int test[2*($expr) - 1]" &&
3631         subarch=$arch64 || subarch=$arch32
3632 }
3633
3634 case "$arch" in
3635     aarch64|alpha|ia64)
3636         spic=$shared
3637     ;;
3638     mips)
3639         check_64bit mips mips64 '_MIPS_SIM > 1'
3640         spic=$shared
3641     ;;
3642     parisc)
3643         check_64bit parisc parisc64 'sizeof(void *) > 4'
3644         spic=$shared
3645     ;;
3646     ppc)
3647         check_64bit ppc ppc64 'sizeof(void *) > 4'
3648         spic=$shared
3649     ;;
3650     s390)
3651         check_64bit s390 s390x 'sizeof(void *) > 4'
3652         spic=$shared
3653     ;;
3654     sparc)
3655         check_64bit sparc sparc64 'sizeof(void *) > 4'
3656         spic=$shared
3657     ;;
3658     x86)
3659         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3660         if test "$subarch" = "x86_64"; then
3661             spic=$shared
3662         fi
3663     ;;
3664 esac
3665
3666 enable $subarch
3667 enabled spic && enable_weak pic
3668
3669 # OS specific
3670 case $target_os in
3671     aix)
3672         SHFLAGS=-shared
3673         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3674         enabled shared && add_ldflags -Wl,-brtl
3675         ;;
3676     android)
3677         disable symver
3678         enable section_data_rel_ro
3679         SLIB_INSTALL_NAME='$(SLIBNAME)'
3680         SLIB_INSTALL_LINKS=
3681         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3682         ;;
3683     haiku)
3684         prefix_default="/boot/common"
3685         network_extralibs="-lnetwork"
3686         host_libs=
3687         ;;
3688     sunos)
3689         SHFLAGS='-shared -Wl,-h,$$(@F)'
3690         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3691         network_extralibs="-lsocket -lnsl"
3692         # When using suncc to build, the Solaris linker will mark
3693         # an executable with each instruction set encountered by
3694         # the Solaris assembler.  As our libraries contain their own
3695         # guards for processor-specific code, instead suppress
3696         # generation of the HWCAPS ELF section on Solaris x86 only.
3697         enabled_all suncc x86 &&
3698             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3699             add_ldflags -Wl,-M,mapfile
3700         nm_default='nm -P -g'
3701         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3702         ;;
3703     netbsd)
3704         disable symver
3705         oss_indev_extralibs="-lossaudio"
3706         oss_outdev_extralibs="-lossaudio"
3707         ;;
3708     openbsd|bitrig)
3709         disable symver
3710         SHFLAGS='-shared'
3711         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3712         SLIB_INSTALL_LINKS=
3713         oss_indev_extralibs="-lossaudio"
3714         oss_outdev_extralibs="-lossaudio"
3715         ;;
3716     dragonfly)
3717         disable symver
3718         ;;
3719     freebsd)
3720         ;;
3721     bsd/os)
3722         add_extralibs -lpoll -lgnugetopt
3723         ;;
3724     darwin)
3725         enabled ppc && add_asflags -force_cpusubtype_ALL
3726         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3727         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3728         add_ldflags -Wl,-dynamic,-search_paths_first
3729         SLIBSUF=".dylib"
3730         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3731         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3732         objformat="macho"
3733         enabled x86_64 && objformat="macho64"
3734         enabled_any pic shared ||
3735             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3736         ;;
3737     msys*)
3738         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3739         ;;
3740     mingw32*|mingw64*)
3741         if test $target_os = "mingw32ce"; then
3742             disable network
3743         else
3744             target_os=mingw32
3745         fi
3746         LIBTARGET=i386
3747         if enabled x86_64; then
3748             LIBTARGET="i386:x86-64"
3749         elif enabled arm; then
3750             LIBTARGET=arm-wince
3751         fi
3752         check_ldflags -Wl,--nxcompat
3753         check_ldflags -Wl,--dynamicbase
3754         shlibdir_default="$bindir_default"
3755         SLIBPREF=""
3756         SLIBSUF=".dll"
3757         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3758         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3759         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3760         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3761         SLIB_INSTALL_LINKS=
3762         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3763         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3764         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3765         objformat="win32"
3766         dlltool="${cross_prefix}dlltool"
3767         ranlib=:
3768         enable dos_paths
3769         ;;
3770     win32|win64)
3771         disable symver
3772         if enabled shared; then
3773             # Link to the import library instead of the normal static library
3774             # for shared libs.
3775             LD_LIB='%.lib'
3776             # Cannot build both shared and static libs with MSVC or icl.
3777             disable static
3778         fi
3779         shlibdir_default="$bindir_default"
3780         SLIBPREF=""
3781         SLIBSUF=".dll"
3782         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3783         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3784         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3785         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3786         SLIB_INSTALL_LINKS=
3787         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3788         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3789         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3790         objformat="win32"
3791         ranlib=:
3792         enable dos_paths
3793         ;;
3794     cygwin*)
3795         target_os=cygwin
3796         shlibdir_default="$bindir_default"
3797         SLIBPREF="cyg"
3798         SLIBSUF=".dll"
3799         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3800         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3801         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3802         SLIB_INSTALL_LINKS=
3803         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3804         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3805         objformat="win32"
3806         enable dos_paths
3807         ;;
3808     *-dos|freedos|opendos)
3809         network_extralibs="-lsocket"
3810         objformat="coff"
3811         enable dos_paths
3812         add_cppflags -U__STRICT_ANSI__
3813         ;;
3814     linux)
3815         enable dv1394
3816         enable section_data_rel_ro
3817         ;;
3818     irix*)
3819         target_os=irix
3820         ranlib="echo ignoring ranlib"
3821         ;;
3822     os/2*)
3823         ln_s="cp -f"
3824         objformat="aout"
3825         add_cppflags -D_GNU_SOURCE
3826         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3827         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3828         LIBSUF="_s.a"
3829         SLIBPREF=""
3830         SLIBSUF=".dll"
3831         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3832         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3833         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3834             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3835             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3836             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3837             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3838         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3839             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3840         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3841         enable dos_paths
3842         ;;
3843     gnu/kfreebsd)
3844         add_cppflags -D_BSD_SOURCE
3845         ;;
3846     gnu)
3847         ;;
3848     qnx)
3849         add_cppflags -D_QNX_SOURCE
3850         network_extralibs="-lsocket"
3851         ;;
3852     symbian)
3853         SLIBSUF=".dll"
3854         enable dos_paths
3855         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3856         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3857         add_ldflags -Wl,--target1-abs,--no-undefined \
3858                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3859                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3860         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3861                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3862                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3863         ;;
3864     osf1)
3865         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3866         ;;
3867     minix)
3868         ;;
3869     plan9)
3870         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3871                      -D_REENTRANT_SOURCE        \
3872                      -D_RESEARCH_SOURCE         \
3873                      -DFD_SETSIZE=96            \
3874                      -DHAVE_SOCK_OPTS
3875         add_compat strtod.o strtod=avpriv_strtod
3876         network_extralibs='-lbsd'
3877         exeobjs=compat/plan9/main.o
3878         cp_f='cp'
3879         ;;
3880     none)
3881         ;;
3882     *)
3883         die "Unknown OS '$target_os'."
3884         ;;
3885 esac
3886
3887 # determine libc flavour
3888
3889 probe_libc(){
3890     pfx=$1
3891     pfx_no_=${pfx%_}
3892     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3893     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3894         eval ${pfx}libc_type=uclibc
3895         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3896     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3897         eval ${pfx}libc_type=glibc
3898         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3899     # MinGW headers can be installed on Cygwin, so check for newlib first.
3900     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3901         eval ${pfx}libc_type=newlib
3902         add_${pfx}cppflags -U__STRICT_ANSI__
3903     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3904     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3905         eval ${pfx}libc_type=mingw64
3906         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3907         eval test \$${pfx_no_}cc_type = "gcc" &&
3908             add_${pfx}cppflags -D__printf__=__gnu_printf__
3909     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3910          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3911         eval ${pfx}libc_type=mingw32
3912         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3913             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3914             die "ERROR: MinGW32 runtime version must be >= 3.15."
3915         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3916         eval test \$${pfx_no_}cc_type = "gcc" &&
3917             add_${pfx}cppflags -D__printf__=__gnu_printf__
3918     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3919         eval ${pfx}libc_type=msvcrt
3920         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3921             if [ "$pfx" = host_ ]; then
3922                 add_host_cppflags -Dsnprintf=_snprintf
3923             else
3924                 add_compat strtod.o strtod=avpriv_strtod
3925                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3926                                              _snprintf=avpriv_snprintf  \
3927                                              vsnprintf=avpriv_vsnprintf
3928             fi
3929         fi
3930         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3931         # 0x601 by default unless something else is set by the user.
3932         # This can easily lead to us detecting functions only present
3933         # in such new versions and producing binaries requiring windows 7.0.
3934         # Therefore explicitly set the default to XP unless the user has
3935         # set something else on the command line.
3936         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3937         # family. For these cases, configure is free to use any functions
3938         # found in the SDK headers by default. (Alternatively, we could force
3939         # _WIN32_WINNT to 0x0602 in that case.)
3940         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3941             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3942 #ifdef WINAPI_FAMILY
3943 #include <winapifamily.h>
3944 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3945 #error not desktop
3946 #endif
3947 #endif
3948 EOF
3949     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3950         eval ${pfx}libc_type=klibc
3951     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3952         eval ${pfx}libc_type=bionic
3953     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3954         eval ${pfx}libc_type=solaris
3955         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3956     else
3957         eval ${pfx}libc_type=default
3958         add_${pfx}cppflags -D_DEFAULT_SOURCE
3959     fi
3960 }
3961
3962 probe_libc
3963 test -n "$libc_type" && enable libc_$libc_type
3964 probe_libc host_
3965 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3966
3967 case $libc_type in
3968     bionic)
3969         add_compat strtod.o strtod=avpriv_strtod
3970         ;;
3971 esac
3972
3973 # hacks for compiler/libc/os combinations
3974
3975 if enabled_all tms470 libc_glibc; then
3976     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3977     add_cppflags -D__USER_LABEL_PREFIX__=
3978     add_cppflags -D__builtin_memset=memset
3979     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3980     add_cflags   -pds=48    # incompatible redefinition of macro
3981 fi
3982
3983 if enabled_all ccc libc_glibc; then
3984     add_ldflags -Wl,-z,now  # calls to libots crash without this
3985 fi
3986
3987 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3988     add_cppflags '-I\$(SRC_PATH)/compat/float'
3989
3990 esc(){
3991     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3992 }
3993
3994 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3995
3996 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3997
3998 set_default $PATHS_LIST
3999 set_default nm
4000
4001 # we need to build at least one lib type
4002 if ! enabled_any static shared; then
4003     cat <<EOF
4004 At least one library type must be built.
4005 Specify --enable-static to build the static libraries or --enable-shared to
4006 build the shared libraries as well. To only build the shared libraries specify
4007 --disable-static in addition to --enable-shared.
4008 EOF
4009     exit 1;
4010 fi
4011
4012 die_license_disabled() {
4013     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4014 }
4015
4016 die_license_disabled gpl libcdio
4017 die_license_disabled gpl libx264
4018 die_license_disabled gpl libx265
4019 die_license_disabled gpl libxavs
4020 die_license_disabled gpl libxvid
4021 die_license_disabled gpl x11grab
4022
4023 die_license_disabled nonfree cuda
4024 die_license_disabled nonfree libfaac
4025 die_license_disabled nonfree libfdk_aac
4026 die_license_disabled nonfree nvenc
4027 die_license_disabled nonfree openssl
4028
4029 die_license_disabled version3 libopencore_amrnb
4030 die_license_disabled version3 libopencore_amrwb
4031 die_license_disabled version3 libvo_aacenc
4032 die_license_disabled version3 libvo_amrwbenc
4033
4034 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4035
4036 disabled optimizations || check_cflags -fomit-frame-pointer
4037
4038 enable_weak_pic() {
4039     disabled pic && return
4040     enable pic
4041     add_cppflags -DPIC
4042     case "$target_os" in
4043     mingw*|cygwin*)
4044         ;;
4045     *)
4046         add_cflags -fPIC
4047         ;;
4048     esac
4049     add_asflags  -fPIC
4050 }
4051
4052 enabled pic && enable_weak_pic
4053
4054 check_cc <<EOF || die "Symbol mangling check failed."
4055 int ff_extern;
4056 EOF
4057 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4058 extern_prefix=${sym%%ff_extern*}
4059
4060 check_cc <<EOF && enable_weak inline_asm
4061 void foo(void) { __asm__ volatile ("" ::); }
4062 EOF
4063
4064 _restrict=
4065 for restrict_keyword in restrict __restrict__ __restrict; do
4066     check_cc <<EOF && _restrict=$restrict_keyword && break
4067 void foo(char * $restrict_keyword p);
4068 EOF
4069 done
4070
4071 check_cc <<EOF && enable pragma_deprecated
4072 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4073 EOF
4074
4075 check_cc <<EOF && enable attribute_packed
4076 struct { int x; } __attribute__((packed)) x;
4077 EOF
4078
4079 check_cc <<EOF && enable attribute_may_alias
4080 union { int x; } __attribute__((may_alias)) x;
4081 EOF
4082
4083 check_cc <<EOF || die "endian test failed"
4084 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4085 EOF
4086 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4087
4088 check_gas() {
4089     log "check_gas using '$as' as AS"
4090     # :vararg is used on aarch64, arm and ppc altivec
4091     check_as <<EOF || return 1
4092 .macro m n, y:vararg=0
4093 \n: .int \y
4094 .endm
4095 m x
4096 EOF
4097     # .altmacro is only used in arm asm
4098     ! enabled arm || check_as <<EOF || return 1
4099 .altmacro
4100 EOF
4101     enable gnu_as
4102     return 0
4103 }
4104
4105 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4106     nogas=:
4107     enabled_any arm aarch64 && nogas=die
4108     enabled_all ppc altivec && nogas=warn
4109     as_noop=-v
4110
4111     case $as_type in
4112         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4113         gcc)  gaspp_as_type=gas ;;
4114         *)    gaspp_as_type=$as_type ;;
4115     esac
4116
4117     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4118
4119     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4120         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4121
4122     if ! check_gas ; then
4123         as=${gas:=$as}
4124         check_gas || \
4125             $nogas "GNU assembler not found, install/update gas-preprocessor"
4126     fi
4127
4128     check_as <<EOF && enable as_func
4129 .func test
4130 .endfunc
4131 EOF
4132 fi
4133
4134 check_inline_asm inline_asm_labels '"1:\n"'
4135
4136 if enabled aarch64; then
4137     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4138     # internal assembler in clang 3.3 does not support this instruction
4139     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4140     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4141
4142     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4143
4144 elif enabled alpha; then
4145
4146     check_cflags -mieee
4147
4148 elif enabled arm; then
4149
4150     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4151     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4152     enabled thumb && check_cflags -mthumb || check_cflags -marm
4153
4154     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4155         enable vfp_args
4156     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4157         enable vfp_args
4158     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4159         case "${cross_prefix:-$cc}" in
4160             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4161             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4162 __asm__ (".eabi_attribute 28, 1");
4163 int main(void) { return 0; }
4164 EOF
4165         esac
4166         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4167     fi
4168
4169     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4170     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4171     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4172     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4173     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4174     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4175
4176     [ $target_os = linux ] || [ $target_os = android ] ||
4177         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4178             $ARCH_EXT_LIST_ARM
4179
4180     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4181
4182     check_as <<EOF && enable as_dn_directive
4183 ra .dn d0.i16
4184 .unreq ra
4185 EOF
4186
4187     # llvm's integrated assembler supports .object_arch from llvm 3.5
4188     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4189 .object_arch armv4
4190 EOF
4191
4192     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4193
4194 elif enabled mips; then
4195
4196     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4197
4198     # make sure that only an instruction set is enabled
4199     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4200
4201     if enabled mips64; then
4202         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4203             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4204                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4205     else
4206         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4207             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4208                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4209     fi
4210
4211 elif enabled parisc; then
4212
4213     if enabled gcc; then
4214         case $($cc -dumpversion) in
4215             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4216         esac
4217     fi
4218
4219 elif enabled ppc; then
4220
4221     enable local_aligned_8 local_aligned_16
4222
4223     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4224     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4225     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4226     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4227
4228     # AltiVec flags: The FSF version of GCC differs from the Apple version
4229     if enabled altivec; then
4230         check_cflags -maltivec -mabi=altivec &&
4231         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4232         check_cflags -faltivec
4233
4234         # check if our compiler supports Motorola AltiVec C API
4235         check_cc <<EOF || disable altivec
4236 $inc_altivec_h
4237 int main(void) {
4238     vector signed int v1 = (vector signed int) { 0 };
4239     vector signed int v2 = (vector signed int) { 1 };
4240     v1 = vec_add(v1, v2);
4241     return 0;
4242 }
4243 EOF
4244
4245         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4246     fi
4247
4248     if enabled vsx; then
4249         check_cflags -mvsx &&
4250         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4251     fi
4252
4253     if enabled power8; then
4254         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4255     fi
4256
4257 elif enabled x86; then
4258
4259     check_builtin rdtsc    intrin.h   "__rdtsc()"
4260     check_builtin mm_empty mmintrin.h "_mm_empty()"
4261
4262     enable local_aligned_8 local_aligned_16
4263
4264     # check whether EBP is available on x86
4265     # As 'i' is stored on the stack, this program will crash
4266     # if the base pointer is used to access it because the
4267     # base pointer is cleared in the inline assembly code.
4268     check_exec_crash <<EOF && enable ebp_available
4269 volatile int i=0;
4270 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4271 return i;
4272 EOF
4273
4274     # check whether EBX is available on x86
4275     check_inline_asm ebx_available '""::"b"(0)' &&
4276         check_inline_asm ebx_available '"":::"%ebx"'
4277
4278     # check whether xmm clobbers are supported
4279     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4280
4281     # check whether binutils is new enough to compile SSSE3/MMXEXT
4282     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4283     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4284
4285     if ! disabled_any asm mmx yasm; then
4286         if check_cmd $yasmexe --version; then
4287             enabled x86_64 && yasm_extra="-m amd64"
4288             yasm_debug="-g dwarf2"
4289         elif check_cmd nasm -v; then
4290             yasmexe=nasm
4291             yasm_debug="-g -F dwarf"
4292             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4293         fi
4294
4295         YASMFLAGS="-f $objformat $yasm_extra"
4296         enabled pic               && append YASMFLAGS "-DPIC"
4297         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4298         case "$objformat" in
4299             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4300         esac
4301
4302         check_yasm "movbe ecx, [5]" && enable yasm ||
4303             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4304         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4305         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4306         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4307         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4308         check_yasm "CPU amdnop" || disable cpunop
4309     fi
4310
4311     case "$cpu" in
4312         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4313             disable fast_clz
4314         ;;
4315     esac
4316
4317 fi
4318
4319 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4320
4321 check_ldflags -Wl,--as-needed
4322
4323 if check_func dlopen; then
4324     ldl=
4325 elif check_func dlopen -ldl; then
4326     ldl=-ldl
4327 fi
4328
4329 if ! disabled network; then
4330     check_func getaddrinfo $network_extralibs
4331     check_func inet_aton $network_extralibs
4332
4333     check_type netdb.h "struct addrinfo"
4334     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4335     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4336     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4337     check_type poll.h "struct pollfd"
4338     check_type netinet/sctp.h "struct sctp_event_subscribe"
4339     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4340     check_type netinet/in.h "struct sockaddr_in6"
4341     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4342     check_type "sys/types.h sys/socket.h" socklen_t
4343
4344     # Prefer arpa/inet.h over winsock2
4345     if check_header arpa/inet.h ; then
4346         check_func closesocket
4347     elif check_header winsock2.h ; then
4348         check_func_headers winsock2.h closesocket -lws2 &&
4349             network_extralibs="-lws2" ||
4350         { check_func_headers winsock2.h closesocket -lws2_32 &&
4351             network_extralibs="-lws2_32"; } || disable winsock2_h network
4352         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4353
4354         check_type ws2tcpip.h socklen_t
4355         check_type ws2tcpip.h "struct addrinfo"
4356         check_type ws2tcpip.h "struct group_source_req"
4357         check_type ws2tcpip.h "struct ip_mreq_source"
4358         check_type ws2tcpip.h "struct ipv6_mreq"
4359         check_type winsock2.h "struct pollfd"
4360         check_struct winsock2.h "struct sockaddr" sa_len
4361         check_type ws2tcpip.h "struct sockaddr_in6"
4362         check_type ws2tcpip.h "struct sockaddr_storage"
4363     else
4364         disable network
4365     fi
4366 fi
4367
4368 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4369 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4370 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4371 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4372
4373 case "$custom_allocator" in
4374     jemalloc)
4375         # jemalloc by default does not use a prefix
4376         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4377     ;;
4378     tcmalloc)
4379         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4380         malloc_prefix=tc_
4381     ;;
4382 esac
4383
4384 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4385 check_func  ${malloc_prefix}memalign            && enable memalign
4386 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4387
4388 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4389     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4390
4391 check_func  fcntl
4392 check_func  fork
4393 check_func  gethrtime
4394 check_func  getopt
4395 check_func  getrusage
4396 check_func  gettimeofday
4397 check_func  gmtime_r
4398 check_func  isatty
4399 check_func  localtime_r
4400 check_func  mach_absolute_time
4401 check_func  mkstemp
4402 check_func  mmap
4403 check_func  mprotect
4404 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4405 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4406 check_func  sched_getaffinity
4407 check_func  setrlimit
4408 check_func  strerror_r
4409 check_func  sysconf
4410 check_func  sysctl
4411 check_func  usleep
4412
4413 check_func_headers io.h setmode
4414 check_func_headers stdlib.h getenv
4415
4416 check_func_headers windows.h CoTaskMemFree -lole32
4417 check_func_headers windows.h GetProcessAffinityMask
4418 check_func_headers windows.h GetProcessTimes
4419 check_func_headers windows.h GetSystemTimeAsFileTime
4420 check_func_headers windows.h LoadLibrary
4421 check_func_headers windows.h MapViewOfFile
4422 check_func_headers windows.h SetConsoleTextAttribute
4423 check_func_headers windows.h Sleep
4424 check_func_headers windows.h VirtualAlloc
4425 check_struct windows.h "CONDITION_VARIABLE" Ptr
4426
4427 check_header direct.h
4428 check_header dlfcn.h
4429 check_header d3d11.h
4430 check_header dxva.h
4431 check_header dxva2api.h
4432 check_header io.h
4433 check_header mach/mach_time.h
4434 check_header malloc.h
4435 check_header poll.h
4436 check_header sys/mman.h
4437 check_header sys/param.h
4438 check_header sys/resource.h
4439 check_header sys/select.h
4440 check_header sys/time.h
4441 check_header sys/un.h
4442 check_header unistd.h
4443 check_header valgrind/valgrind.h
4444 check_header vdpau/vdpau.h
4445 check_header vdpau/vdpau_x11.h
4446 check_header VideoDecodeAcceleration/VDADecoder.h
4447 check_header windows.h
4448 check_header X11/extensions/XvMClib.h
4449
4450 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4451 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4452 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4453
4454 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4455
4456 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4457 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4458 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4459
4460 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4461
4462 if ! disabled w32threads && ! enabled pthreads; then
4463     check_func_headers "windows.h process.h" _beginthreadex &&
4464         enable w32threads || disable w32threads
4465 fi
4466
4467 # check for some common methods of building with pthread support
4468 # do this before the optional library checks as some of them require pthreads
4469 if ! disabled pthreads && ! enabled w32threads; then
4470     enable pthreads
4471     if check_func pthread_join -pthread; then
4472         add_cflags -pthread
4473         add_extralibs -pthread
4474     elif check_func pthread_join -pthreads; then
4475         add_cflags -pthreads
4476         add_extralibs -pthreads
4477     elif check_func pthread_join -lpthreadGC2; then
4478         add_extralibs -lpthreadGC2
4479     elif check_lib pthread.h pthread_join -lpthread; then
4480         :
4481     elif ! check_func pthread_join; then
4482         disable pthreads
4483     fi
4484 fi
4485
4486 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4487 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4488
4489 check_lib math.h sin -lm && LIBM="-lm"
4490 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4491
4492 atan2f_args=2
4493 ldexpf_args=2
4494 powf_args=2
4495
4496 for func in $MATH_FUNCS; do
4497     eval check_mathfunc $func \${${func}_args:-1}
4498 done
4499
4500 # these are off by default, so fail if requested and not available
4501 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4502                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4503                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4504 enabled cuda              && check_lib cuda.h cuInit -lcuda
4505 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4506 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4507 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4508 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4509 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4510 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4511 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4512 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4513 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4514                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4515                                done || die "ERROR: libgsm not found"; }
4516 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4517 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4518 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4519 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4520 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4521 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4522 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4523 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4524 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4525                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4526 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4527 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4528 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4529 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4530 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4531 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4532 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4533 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4534 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4535 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4536 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4537 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4538     enabled libvpx_vp8_decoder && {
4539         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4540             disable libvpx_vp8_decoder;
4541     }
4542     enabled libvpx_vp8_encoder && {
4543         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4544             disable libvpx_vp8_encoder;
4545     }
4546     enabled libvpx_vp9_decoder && {
4547         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4548             disable libvpx_vp9_decoder;
4549     }
4550     enabled libvpx_vp9_encoder && {
4551         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4552             disable libvpx_vp9_encoder;
4553     }
4554     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4555         die "libvpx enabled but no supported decoders found"
4556     fi
4557 }
4558 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4559 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4560 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4561                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4562                                die "ERROR: libx264 version must be >= 0.118."; } &&
4563                              { check_cpp_condition x264.h "X264_MPEG2" &&
4564                                enable libx262; }
4565 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4566                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4567                                die "ERROR: libx265 version must be >= 57."; }
4568 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4569 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4570 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4571                                 { ! enabled cross_compile && {
4572                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4573                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4574                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4575                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4576                                die "ERROR: mmal not found"; }
4577 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4578                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4579                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4580                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4581                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4582                                die "ERROR: openssl not found"; }
4583
4584 if enabled gnutls; then
4585     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4586     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4587 fi
4588
4589 # libdc1394 check
4590 if enabled libdc1394; then
4591     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4592         enable libdc1394_2; } ||
4593     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4594         enable libdc1394_1; } ||
4595     die "ERROR: No version of libdc1394 found "
4596 fi
4597
4598 if enabled nvenc; then
4599     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found.";
4600     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4601     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4602         die "ERROR: NVENC API version 4 or older is not supported";
4603 fi
4604
4605 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4606     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4607     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4608     enable sdl
4609 fi
4610
4611 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4612 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4613
4614 check_header linux/fb.h
4615 check_header linux/videodev2.h
4616 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4617
4618 check_header AVFoundation/AVFoundation.h &&
4619     check_objcflags -fobjc-arc &&
4620     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4621     disable AVFoundation_AVFoundation_h
4622
4623 check_header sys/videoio.h
4624
4625 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4626 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4627 # w32api 3.12 had it defined wrong
4628 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4629
4630 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4631 { check_header dev/bktr/ioctl_meteor.h &&
4632   check_header dev/bktr/ioctl_bt848.h; } ||
4633 { check_header machine/ioctl_meteor.h &&
4634   check_header machine/ioctl_bt848.h; } ||
4635 { check_header dev/video/meteor/ioctl_meteor.h &&
4636   check_header dev/video/bktr/ioctl_bt848.h; } ||
4637 check_header dev/ic/bt8xx.h
4638
4639 check_header sndio.h
4640 check_header sys/soundcard.h
4641 check_header soundcard.h
4642
4643 enabled_any alsa_indev alsa_outdev &&
4644     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4645
4646 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4647     check_func jack_port_get_latency_range -ljack
4648
4649 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4650
4651 if enabled libcdio; then
4652     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4653     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4654     die "ERROR: No usable libcdio/cdparanoia found"
4655 fi
4656
4657 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4658
4659 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4660     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4661         enabled libxcb && die "ERROR: libxcb not found";
4662     } && disable x11grab && enable libxcb
4663
4664     disabled libxcb_shm ||
4665         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4666             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4667         } && check_header sys/shm.h && enable libxcb_shm
4668
4669     disabled libxcb_xfixes ||
4670         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4671             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4672         } && enable libxcb_xfixes
4673
4674     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4675     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4676 fi
4677
4678 if enabled x11grab; then
4679     enabled xlib || die "ERROR: Xlib not found"
4680     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4681     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4682 fi
4683
4684 enabled vaapi &&
4685     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4686     disable vaapi
4687
4688 enabled vaapi && enabled xlib &&
4689     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4690     enable vaapi_x11
4691
4692 enabled vdpau &&
4693     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4694     disable vdpau
4695
4696 enabled vdpau && enabled xlib &&
4697     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4698     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4699     enable vdpau_x11
4700
4701 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4702
4703 # add some useful compiler flags if supported
4704 check_cflags -Wdeclaration-after-statement
4705 check_cflags -Wall
4706 check_cflags -Wdisabled-optimization
4707 check_cflags -Wpointer-arith
4708 check_cflags -Wredundant-decls
4709 check_cflags -Wwrite-strings
4710 check_cflags -Wtype-limits
4711 check_cflags -Wundef
4712 check_cflags -Wmissing-prototypes
4713 check_cflags -Wstrict-prototypes
4714 enabled extra_warnings && check_cflags -Winline
4715 enabled extra_warnings && check_cflags -Wcast-qual
4716
4717 check_disable_warning(){
4718     warning_flag=-W${1#-Wno-}
4719     test_cflags $warning_flag && add_cflags $1
4720 }
4721
4722 check_disable_warning -Wno-parentheses
4723 check_disable_warning -Wno-switch
4724 check_disable_warning -Wno-format-zero-length
4725 check_disable_warning -Wno-pointer-sign
4726
4727 # add some linker flags
4728 check_ldflags -Wl,--warn-common
4729 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4730 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4731 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4732
4733 # add some strip flags
4734 # -wN '..@*' is more selective than -x, but not available everywhere.
4735 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4736
4737 enabled neon_clobber_test &&
4738     check_ldflags -Wl,--wrap,avcodec_open2              \
4739                   -Wl,--wrap,avcodec_decode_audio4      \
4740                   -Wl,--wrap,avcodec_decode_video2      \
4741                   -Wl,--wrap,avcodec_decode_subtitle2   \
4742                   -Wl,--wrap,avcodec_encode_audio2      \
4743                   -Wl,--wrap,avcodec_encode_video2      \
4744                   -Wl,--wrap,avcodec_encode_subtitle    \
4745                   -Wl,--wrap,avresample_convert ||
4746     disable neon_clobber_test
4747
4748 enabled xmm_clobber_test &&
4749     check_ldflags -Wl,--wrap,avcodec_open2              \
4750                   -Wl,--wrap,avcodec_decode_audio4      \
4751                   -Wl,--wrap,avcodec_decode_video2      \
4752                   -Wl,--wrap,avcodec_decode_subtitle2   \
4753                   -Wl,--wrap,avcodec_encode_audio2      \
4754                   -Wl,--wrap,avcodec_encode_video2      \
4755                   -Wl,--wrap,avcodec_encode_subtitle    \
4756                   -Wl,--wrap,avresample_convert         \
4757                   -Wl,--wrap,sws_scale ||
4758     disable xmm_clobber_test
4759
4760 echo "X { local: *; };" > $TMPV
4761 if test_ldflags -Wl,--version-script,$TMPV; then
4762     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4763 elif test_ldflags -Wl,-M,$TMPV; then
4764     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4765 fi
4766
4767 check_cc <<EOF && enable symver_asm_label
4768 void ff_foo(void) __asm__ ("av_foo@VERSION");
4769 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4770 EOF
4771     check_cc <<EOF && enable symver_gnu_asm
4772 __asm__(".symver ff_foo,av_foo@VERSION");
4773 void ff_foo(void) {}
4774 EOF
4775
4776 if [ -z "$optflags" ]; then
4777     if enabled small; then
4778         optflags=$cflags_size
4779     elif enabled optimizations; then
4780         optflags=$cflags_speed
4781     else
4782         optflags=$cflags_noopt
4783     fi
4784 fi
4785
4786 check_optflags(){
4787     check_cflags "$@"
4788     enabled lto && check_ldflags "$@"
4789 }
4790
4791
4792 if enabled lto; then
4793     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4794     check_cflags  -flto
4795     check_ldflags -flto $cpuflags
4796 fi
4797
4798 check_optflags $optflags
4799 check_optflags -fno-math-errno
4800 check_optflags -fno-signed-zeros
4801
4802 if enabled icc; then
4803     # Just warnings, no remarks
4804     check_cflags -w1
4805     # -wd: Disable following warnings
4806     # 144, 167, 556: -Wno-pointer-sign
4807     # 1292: attribute "foo" ignored
4808     # 1419: external declaration in primary source file
4809     # 10006: ignoring unknown option -fno-signed-zeros
4810     # 10148: ignoring unknown option&n