build: Disentangle VC-1 decoder and parser
[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     startcode
1704     texturedsp
1705     texturedspenc
1706     tpeldsp
1707     vc1dsp
1708     videodsp
1709     vp3dsp
1710     vp56dsp
1711     vp8dsp
1712     wma_freqs
1713     wmv2dsp
1714 "
1715
1716 CMDLINE_SELECT="
1717     $ARCH_EXT_LIST
1718     $CONFIG_LIST
1719     $HAVE_LIST_CMDLINE
1720     $THREADS_LIST
1721     asm
1722     cross_compile
1723     debug
1724     extra_warnings
1725     logging
1726     lto
1727     optimizations
1728     rpath
1729 "
1730
1731 PATHS_LIST="
1732     bindir
1733     datadir
1734     docdir
1735     incdir
1736     libdir
1737     mandir
1738     prefix
1739     shlibdir
1740 "
1741
1742 CMDLINE_SET="
1743     $PATHS_LIST
1744     ar
1745     arch
1746     as
1747     build_suffix
1748     cc
1749     objcc
1750     cpu
1751     cross_prefix
1752     custom_allocator
1753     dep_cc
1754     env
1755     extra_version
1756     host_cc
1757     host_cflags
1758     host_ld
1759     host_ldflags
1760     host_libs
1761     host_os
1762     ld
1763     logfile
1764     malloc_prefix
1765     nm
1766     optflags
1767     pkg_config
1768     pkg_config_flags
1769     random_seed
1770     samples
1771     sysinclude
1772     sysroot
1773     target_exec
1774     target_os
1775     target_path
1776     target_samples
1777     toolchain
1778 "
1779
1780 CMDLINE_APPEND="
1781     extra_cflags
1782     extra_objcflags
1783     host_cppflags
1784 "
1785
1786 # code dependency declarations
1787
1788 # architecture extensions
1789
1790 armv5te_deps="arm"
1791 armv6_deps="arm"
1792 armv6t2_deps="arm"
1793 armv8_deps="aarch64"
1794 neon_deps_any="aarch64 arm"
1795 intrinsics_neon_deps="neon"
1796 vfp_deps_any="aarch64 arm"
1797 vfpv3_deps="vfp"
1798
1799 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1800
1801 altivec_deps="ppc"
1802 ppc4xx_deps="ppc"
1803 vsx_deps="altivec"
1804 power8_deps="vsx"
1805
1806 cpunop_deps="i686"
1807 x86_64_select="i686"
1808 x86_64_suggest="fast_cmov"
1809
1810 amd3dnow_deps="mmx"
1811 amd3dnowext_deps="amd3dnow"
1812 i686_deps="x86"
1813 mmx_deps="x86"
1814 mmxext_deps="mmx"
1815 sse_deps="mmxext"
1816 sse2_deps="sse"
1817 sse3_deps="sse2"
1818 ssse3_deps="sse3"
1819 sse4_deps="ssse3"
1820 sse42_deps="sse4"
1821 avx_deps="sse42"
1822 xop_deps="avx"
1823 fma3_deps="avx"
1824 fma4_deps="avx"
1825 avx2_deps="avx"
1826
1827 mmx_external_deps="yasm"
1828 mmx_inline_deps="inline_asm"
1829 mmx_suggest="mmx_external mmx_inline"
1830
1831 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1832     eval dep=\$${ext}_deps
1833     eval ${ext}_external_deps='"${dep}_external"'
1834     eval ${ext}_inline_deps='"${dep}_inline"'
1835     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1836 done
1837
1838 aligned_stack_if_any="aarch64 ppc x86"
1839 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1840 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1841 fast_unaligned_if_any="aarch64 ppc x86"
1842 simd_align_16_if_any="altivec neon sse"
1843
1844 # system capabilities
1845 symver_if_any="symver_asm_label symver_gnu_asm"
1846 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1847
1848 # threading support
1849 atomics_gcc_if="sync_val_compare_and_swap"
1850 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1851 atomics_win32_if="MemoryBarrier"
1852 atomics_native_if_any="$ATOMICS_LIST"
1853 w32threads_deps="atomics_native"
1854 threads_if_any="$THREADS_LIST"
1855
1856 # subsystems
1857 dct_select="rdft"
1858 dirac_parse_select="golomb"
1859 error_resilience_select="me_cmp"
1860 faandct_deps="faan fdctdsp"
1861 faanidct_deps="faan idctdsp"
1862 h264dsp_select="startcode"
1863 intrax8_select="error_resilience"
1864 mdct_select="fft"
1865 rdft_select="fft"
1866 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1867 mpeg_er_select="error_resilience"
1868 mpegaudio_select="mpegaudiodsp"
1869 mpegaudiodsp_select="dct"
1870 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1871 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1872 nvenc_deps_any="dlopen LoadLibrary"
1873 nvenc_extralibs='$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 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"
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"
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 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2521 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2522 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2523 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2524 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2525 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2526 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2527
2528 ALL_COMPONENTS="
2529     $BSF_LIST
2530     $DECODER_LIST
2531     $DEMUXER_LIST
2532     $ENCODER_LIST
2533     $FILTER_LIST
2534     $HWACCEL_LIST
2535     $INDEV_LIST
2536     $MUXER_LIST
2537     $OUTDEV_LIST
2538     $PARSER_LIST
2539     $PROTOCOL_LIST
2540 "
2541
2542 for n in $COMPONENT_LIST; do
2543     v=$(toupper ${n%s})_LIST
2544     eval enable \$$v
2545     eval ${n}_if_any="\$$v"
2546 done
2547
2548 enable $ARCH_EXT_LIST
2549
2550 die_unknown(){
2551     echo "Unknown option \"$1\"."
2552     echo "See $0 --help for available options."
2553     exit 1
2554 }
2555
2556 print_3_columns() {
2557     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2558 }
2559
2560 show_list() {
2561     suffix=_$1
2562     shift
2563     echo $* | sed s/$suffix//g | print_3_columns
2564     exit 0
2565 }
2566
2567 rand_list(){
2568     IFS=', '
2569     set -- $*
2570     unset IFS
2571     for thing; do
2572         comp=${thing%:*}
2573         prob=${thing#$comp}
2574         prob=${prob#:}
2575         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2576         echo "prob ${prob:-0.5}"
2577         printf '%s\n' $comp
2578     done
2579 }
2580
2581 do_random(){
2582     action=$1
2583     shift
2584     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2585     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2586 }
2587
2588 for opt do
2589     optval="${opt#*=}"
2590     case "$opt" in
2591         --extra-ldflags=*)
2592             add_ldflags $optval
2593         ;;
2594         --extra-ldexeflags=*)
2595             add_ldexeflags $optval
2596         ;;
2597         --extra-libs=*)
2598             add_extralibs $optval
2599         ;;
2600         --disable-devices)
2601             disable $INDEV_LIST $OUTDEV_LIST
2602         ;;
2603         --enable-debug=*)
2604             debuglevel="$optval"
2605         ;;
2606         --disable-programs)
2607             disable $PROGRAM_LIST
2608         ;;
2609         --disable-everything)
2610             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2611         ;;
2612         --disable-all)
2613             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2614             disable $LIBRARY_LIST $PROGRAM_LIST doc
2615         ;;
2616         --enable-random|--disable-random)
2617             action=${opt%%-random}
2618             do_random ${action#--} $COMPONENT_LIST
2619         ;;
2620         --enable-random=*|--disable-random=*)
2621             action=${opt%%-random=*}
2622             do_random ${action#--} $optval
2623         ;;
2624         --enable-*=*|--disable-*=*)
2625             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2626             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2627             eval list=\$$(toupper $thing)_LIST
2628             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2629             $action $(filter "$name" $list)
2630         ;;
2631         --enable-avserver|--disable-avserver*)
2632             warn "avserver has been removed, the ${opt} option is only"\
2633                  "provided for compatibility and will be removed in the future"
2634         ;;
2635         --enable-?*|--disable-?*)
2636             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2637             if is_in $option $COMPONENT_LIST; then
2638                 test $action = disable && action=unset
2639                 eval $action \$$(toupper ${option%s})_LIST
2640             elif is_in $option $CMDLINE_SELECT; then
2641                 $action $option
2642             else
2643                 die_unknown $opt
2644             fi
2645         ;;
2646         --list-*)
2647             NAME="${opt#--list-}"
2648             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2649             NAME=${NAME%s}
2650             eval show_list $NAME \$$(toupper $NAME)_LIST
2651         ;;
2652         --help|-h) show_help
2653         ;;
2654         *)
2655             optname="${opt%%=*}"
2656             optname="${optname#--}"
2657             optname=$(echo "$optname" | sed 's/-/_/g')
2658             if is_in $optname $CMDLINE_SET; then
2659                 eval $optname='$optval'
2660             elif is_in $optname $CMDLINE_APPEND; then
2661                 append $optname "$optval"
2662             else
2663                 die_unknown $opt
2664             fi
2665         ;;
2666     esac
2667 done
2668
2669 for e in $env; do
2670     eval "export $e"
2671 done
2672
2673 disabled logging && logfile=/dev/null
2674
2675 # Disable all the library-specific components if the library itself
2676 # is disabled, see AVCODEC_LIST and following _LIST variables.
2677
2678 disable_components(){
2679     disabled ${1} && disable $(
2680         eval components="\$$(toupper ${1})_COMPONENTS"
2681         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2682     )
2683 }
2684
2685 map 'disable_components $v' $LIBRARY_LIST
2686
2687 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2688 set >> $logfile
2689
2690 case "$toolchain" in
2691     *-asan)
2692         cc_default="${toolchain%-asan}"
2693         add_cflags  -fsanitize=address
2694         add_ldflags -fsanitize=address
2695     ;;
2696     *-tsan)
2697         cc_default="${toolchain%-tsan}"
2698         add_cflags  -fsanitize=thread -pie
2699         add_ldflags -fsanitize=thread -pie
2700         case "$toolchain" in
2701             gcc-tsan)
2702                 add_cflags  -fPIC
2703                 add_ldflags -fPIC
2704                 ;;
2705         esac
2706     ;;
2707     *-usan)
2708         cc_default="${toolchain%-usan}"
2709         add_cflags  -fsanitize=undefined
2710         add_ldflags -fsanitize=undefined
2711         case "$toolchain" in
2712             clang-usan)
2713                 add_cflags -O1
2714                 ;;
2715         esac
2716     ;;
2717     valgrind-*)
2718         target_exec_default="valgrind"
2719         case "$toolchain" in
2720             valgrind-massif)
2721                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2722                 ;;
2723             valgrind-memcheck)
2724                 target_exec_args="--track-origins=yes --leak-check=full"
2725                 ;;
2726         esac
2727     ;;
2728     msvc)
2729         # Check whether the current MSVC version needs the C99 converter.
2730         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2731         # support enough of C99 to build libav. Default to the new
2732         # behaviour if the regexp was unable to match anything, since this
2733         # successfully parses the version number of existing supported
2734         # versions that require the converter (MSVC 2010 and 2012).
2735         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2736         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2737             cc_default="cl"
2738         else
2739             cc_default="c99wrap cl"
2740         fi
2741         ld_default="$source_path/compat/windows/mslink"
2742         nm_default="dumpbin -symbols"
2743         ar_default="lib"
2744         case "$arch" in
2745         arm*)
2746             as_default="armasm"
2747             ;;
2748         esac
2749         target_os_default="win32"
2750         # Use a relative path for TMPDIR. This makes sure all the
2751         # ffconf temp files are written with a relative path, avoiding
2752         # issues with msys/win32 path conversion for MSVC parameters
2753         # such as -Fo<file> or -out:<file>.
2754         TMPDIR=.
2755     ;;
2756     icl)
2757         cc_default="icl"
2758         ld_default="xilink"
2759         nm_default="dumpbin -symbols"
2760         ar_default="xilib"
2761         target_os_default="win32"
2762         TMPDIR=.
2763     ;;
2764     gcov)
2765         add_cflags  -fprofile-arcs -ftest-coverage
2766         add_ldflags -fprofile-arcs -ftest-coverage
2767     ;;
2768     hardened)
2769         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2770         add_cflags   -fno-strict-overflow -fstack-protector-all
2771         add_ldflags  -Wl,-z,relro -Wl,-z,now
2772     ;;
2773     ?*)
2774         die "Unknown toolchain $toolchain"
2775     ;;
2776 esac
2777
2778 test -n "$cross_prefix" && enable cross_compile
2779
2780 if enabled cross_compile; then
2781     test -n "$arch" && test -n "$target_os" ||
2782         die "Must specify target arch and OS when cross-compiling"
2783 fi
2784
2785 ar_default="${cross_prefix}${ar_default}"
2786 cc_default="${cross_prefix}${cc_default}"
2787 occ_default="${cross_prefix}${occ_default}"
2788 nm_default="${cross_prefix}${nm_default}"
2789 pkg_config_default="${cross_prefix}${pkg_config_default}"
2790 ranlib="${cross_prefix}${ranlib}"
2791 strip="${cross_prefix}${strip}"
2792
2793 sysinclude_default="${sysroot}/usr/include"
2794
2795 set_default arch cc pkg_config sysinclude target_exec target_os
2796 enabled cross_compile || host_cc_default=$cc
2797 set_default host_cc
2798
2799 if ! $pkg_config --version >/dev/null 2>&1; then
2800     warn "$pkg_config not found, library detection may fail."
2801     pkg_config=false
2802 fi
2803
2804 exesuf() {
2805     case $1 in
2806         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2807     esac
2808 }
2809
2810 EXESUF=$(exesuf $target_os)
2811 HOSTEXESUF=$(exesuf $host_os)
2812
2813 # set temporary file name
2814 : ${TMPDIR:=$TEMPDIR}
2815 : ${TMPDIR:=$TMP}
2816 : ${TMPDIR:=/tmp}
2817
2818 if ! check_cmd mktemp -u XXXXXX; then
2819     # simple replacement for missing mktemp
2820     # NOT SAFE FOR GENERAL USE
2821     mktemp(){
2822         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2823     }
2824 fi
2825
2826 tmpfile(){
2827     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2828         (set -C; exec > $tmp) 2>/dev/null ||
2829         die "Unable to create temporary file in $TMPDIR."
2830     append TMPFILES $tmp
2831     eval $1=$tmp
2832 }
2833
2834 trap 'rm -f -- $TMPFILES' EXIT
2835
2836 tmpfile TMPASM .asm
2837 tmpfile TMPC   .c
2838 tmpfile TMPE   $EXESUF
2839 tmpfile TMPH   .h
2840 tmpfile TMPO   .o
2841 tmpfile TMPS   .S
2842 tmpfile TMPSH  .sh
2843 tmpfile TMPV   .ver
2844
2845 unset -f mktemp
2846
2847 chmod +x $TMPE
2848
2849 # make sure we can execute files in $TMPDIR
2850 cat > $TMPSH 2>> $logfile <<EOF
2851 #! /bin/sh
2852 EOF
2853 chmod +x $TMPSH >> $logfile 2>&1
2854 if ! $TMPSH >> $logfile 2>&1; then
2855     cat <<EOF
2856 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2857 variable to another directory and make sure that it is not mounted noexec.
2858 EOF
2859     die "Sanity test failed."
2860 fi
2861
2862 armasm_flags(){
2863     for flag; do
2864         case $flag in
2865             # Filter out MSVC cl.exe options from cflags that shouldn't
2866             # be passed to gas-preprocessor
2867             -M[TD]*)                                            ;;
2868             *)                  echo $flag                      ;;
2869         esac
2870    done
2871 }
2872
2873 ccc_flags(){
2874     for flag; do
2875         case $flag in
2876             -std=c99)           echo -c99                       ;;
2877             -mcpu=*)            echo -arch ${flag#*=}           ;;
2878             -mieee)             echo -ieee                      ;;
2879             -O*|-fast)          echo $flag                      ;;
2880             -fno-math-errno)    echo -assume nomath_errno       ;;
2881             -g)                 echo -g3                        ;;
2882             -Wall)              echo -msg_enable level2         ;;
2883             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2884             -Wl,*)              echo $flag                      ;;
2885             -f*|-W*)                                            ;;
2886             *)                  echo $flag                      ;;
2887         esac
2888    done
2889 }
2890
2891 cparser_flags(){
2892     for flag; do
2893         case $flag in
2894             -Wno-switch)             echo -Wno-switch-enum ;;
2895             -Wno-format-zero-length) ;;
2896             -Wdisabled-optimization) ;;
2897             -Wno-pointer-sign)       echo -Wno-other ;;
2898             *)                       echo $flag ;;
2899         esac
2900     done
2901 }
2902
2903 msvc_common_flags(){
2904     for flag; do
2905         case $flag in
2906             # In addition to specifying certain flags under the compiler
2907             # specific filters, they must be specified here as well or else the
2908             # generic catch all at the bottom will print the original flag.
2909             -Wall)                ;;
2910             -std=c99)             ;;
2911             # Common flags
2912             -fomit-frame-pointer) ;;
2913             -g)                   echo -Z7 ;;
2914             -fno-math-errno)      ;;
2915             -fno-common)          ;;
2916             -fno-signed-zeros)    ;;
2917             -fPIC)                ;;
2918             -mthumb)              ;;
2919             -march=*)             ;;
2920             -lz)                  echo zlib.lib ;;
2921             -lavifil32)           echo vfw32.lib ;;
2922             -lavicap32)           echo vfw32.lib user32.lib ;;
2923             -lx264)               echo libx264.lib ;;
2924             -l*)                  echo ${flag#-l}.lib ;;
2925             -L*)                  echo -libpath:${flag#-L} ;;
2926             *)                    echo $flag ;;
2927         esac
2928     done
2929 }
2930
2931 msvc_flags(){
2932     msvc_common_flags "$@"
2933     for flag; do
2934         case $flag in
2935             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2936                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2937                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2938                                        -wd4273 -wd4554 -wd4701 ;;
2939         esac
2940     done
2941 }
2942
2943 icl_flags(){
2944     msvc_common_flags "$@"
2945     for flag; do
2946         case $flag in
2947             # Despite what Intel's documentation says -Wall, which is supported
2948             # on Windows, does enable remarks so disable them here.
2949             -Wall)                echo $flag -Qdiag-disable:remark ;;
2950             -std=c99)             echo -Qstd=c99 ;;
2951         esac
2952     done
2953 }
2954
2955 pgi_flags(){
2956     for flag; do
2957         case $flag in
2958             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2959             -fomit-frame-pointer) echo -Mnoframe ;;
2960             -g)                   echo -gopt ;;
2961             *)                    echo $flag ;;
2962         esac
2963     done
2964 }
2965
2966 suncc_flags(){
2967     for flag; do
2968         case $flag in
2969             -march=*|-mcpu=*)
2970                 case "${flag#*=}" in
2971                     native)                   echo -xtarget=native       ;;
2972                     v9|niagara)               echo -xarch=sparc          ;;
2973                     ultrasparc)               echo -xarch=sparcvis       ;;
2974                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2975                     i586|pentium)             echo -xchip=pentium        ;;
2976                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2977                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2978                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2979                     pentium4*)          echo -xtarget=pentium4           ;;
2980                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2981                     *-sse3)             echo -xarch=sse3                 ;;
2982                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2983                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2984                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2985                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2986                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2987                     k8|opteron|athlon64|athlon-fx)
2988                                                echo -xarch=sse2a         ;;
2989                     athlon*)                   echo -xarch=pentium_proa  ;;
2990                 esac
2991                 ;;
2992             -std=c99)             echo -xc99              ;;
2993             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2994             -fPIC)                echo -KPIC -xcode=pic32 ;;
2995             -W*,*)                echo $flag              ;;
2996             -f*-*|-W*|-mimpure-text)                      ;;
2997             -shared)              echo -G                 ;;
2998             *)                    echo $flag              ;;
2999         esac
3000     done
3001 }
3002
3003 tms470_flags(){
3004     for flag; do
3005         case $flag in
3006             -march=*|-mcpu=*)
3007                 case "${flag#*=}" in
3008                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3009                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3010                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3011                     armv6*|arm11*)          echo -mv=6   ;;
3012                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3013                                             echo -mv=5e  ;;
3014                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3015                 esac
3016                 ;;
3017             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3018             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3019             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3020             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3021             -msoft-float)   echo --float_support=vfplib       ;;
3022             -O[0-3]|-mf=*)  echo $flag                        ;;
3023             -g)             echo -g -mn                       ;;
3024             -pds=*)         echo $flag                        ;;
3025             -D*|-I*)        echo $flag                        ;;
3026             --gcc|--abi=*)  echo $flag                        ;;
3027             -me)            echo $flag                        ;;
3028         esac
3029     done
3030 }
3031
3032 probe_cc(){
3033     pfx=$1
3034     _cc=$2
3035
3036     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3037     unset _ld_o _ldflags _ld_lib _ld_path
3038     unset _depflags _DEPCMD _DEPFLAGS
3039     _flags_filter=echo
3040
3041     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3042         _type=llvm_gcc
3043         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3044         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3045         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3046         _cflags_speed='-O3'
3047         _cflags_size='-Os'
3048     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3049         _type=gcc
3050         gcc_version=$($_cc --version | head -n1)
3051         gcc_basever=$($_cc -dumpversion)
3052         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3053         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3054         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3055         if ! $_cc -dumpversion | grep -q '^2\.'; then
3056             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3057         fi
3058         _cflags_speed='-O3'
3059         _cflags_size='-Os'
3060     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3061         _type=icc
3062         _ident=$($_cc --version | head -n1)
3063         _depflags='-MMD'
3064         _cflags_speed='-O3'
3065         _cflags_size='-Os'
3066         _cflags_noopt='-O1'
3067     elif $_cc -v 2>&1 | grep -q xlc; then
3068         _type=xlc
3069         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3070         _cflags_speed='-O5'
3071         _cflags_size='-O5 -qcompact'
3072     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3073         _type=ccc
3074         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3075         _DEPFLAGS='-M'
3076         _cflags_speed='-fast'
3077         _cflags_size='-O1'
3078         _flags_filter=ccc_flags
3079     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3080         test -d "$sysroot" || die "No valid sysroot specified."
3081         _type=armcc
3082         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3083         armcc_conf="$PWD/armcc.conf"
3084         $_cc --arm_linux_configure                 \
3085              --arm_linux_config_file="$armcc_conf" \
3086              --configure_sysroot="$sysroot"        \
3087              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3088              die "Error creating armcc configuration file."
3089         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3090         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3091         as_default="${cross_prefix}gcc"
3092         _depflags='-MMD'
3093         _cflags_speed='-O3'
3094         _cflags_size='-Os'
3095     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3096         _type=tms470
3097         _ident=$($_cc -version | head -n1 | tr -s ' ')
3098         _flags='--gcc --abi=eabi -me'
3099         _cc_e='-ppl -fe=$@'
3100         _cc_o='-fe=$@'
3101         _depflags='-ppa -ppd=$(@:.o=.d)'
3102         _cflags_speed='-O3 -mf=5'
3103         _cflags_size='-O3 -mf=2'
3104         _flags_filter=tms470_flags
3105     elif $_cc -v 2>&1 | grep -q clang; then
3106         _type=clang
3107         _ident=$($_cc --version 2>/dev/null | head -n1)
3108         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3109         _cflags_speed='-O3'
3110         _cflags_size='-Os'
3111     elif $_cc -V 2>&1 | grep -q Sun; then
3112         _type=suncc
3113         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3114         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3115         _DEPFLAGS='-xM1 -xc99'
3116         _ldflags='-std=c99'
3117         _cflags_speed='-O5'
3118         _cflags_size='-O5 -xspace'
3119         _flags_filter=suncc_flags
3120     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3121         _type=pathscale
3122         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3123         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3124         _cflags_speed='-O2'
3125         _cflags_size='-Os'
3126         _flags_filter='filter_out -Wdisabled-optimization'
3127     elif $_cc -v 2>&1 | grep -q Open64; then
3128         _type=open64
3129         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3130         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3131         _cflags_speed='-O2'
3132         _cflags_size='-Os'
3133         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3134     elif $_cc -V 2>&1 | grep -q Portland; then
3135         _type=pgi
3136         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3137         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3138         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3139         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3140         _cflags_noopt="-O1"
3141         _flags_filter=pgi_flags
3142     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3143         _type=armasm
3144         _ident=$($_cc | head -n1)
3145         # 4509: "This form of conditional instruction is deprecated"
3146         _flags="-nologo -ignore 4509"
3147         _flags_filter=armasm_flags
3148     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3149         _type=msvc
3150         _ident=$($_cc 2>&1 | head -n1)
3151         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3152         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3153         _cflags_speed="-O2"
3154         _cflags_size="-O1"
3155         if $_cc -nologo- 2>&1 | grep -q Linker; then
3156             _ld_o='-out:$@'
3157         else
3158             _ld_o='-Fe$@'
3159         fi
3160         _cc_o='-Fo$@'
3161         _cc_e='-P -Fi$@'
3162         _flags_filter=msvc_flags
3163         _ld_lib='lib%.a'
3164         _ld_path='-libpath:'
3165         _flags='-nologo'
3166         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3167     elif $_cc 2>&1 | grep -q Intel; then
3168         _type=icl
3169         _ident=$($_cc 2>&1 | head -n1)
3170         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3171         # Not only is O3 broken on 13.x+ but it is slower on all previous
3172         # versions (tested) as well.
3173         _cflags_speed="-O2"
3174         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3175         if $_cc 2>&1 | grep -q Linker; then
3176             _ld_o='-out:$@'
3177         else
3178             _ld_o='-Fe$@'
3179         fi
3180         _cc_o='-Fo$@'
3181         _cc_e='-P'
3182         _flags_filter=icl_flags
3183         _ld_lib='lib%.a'
3184         _ld_path='-libpath:'
3185         # -Qdiag-error to make icl error when seeing certain unknown arguments
3186         _flags='-nologo -Qdiag-error:4044,10157'
3187         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3188         # with MSVC which enables it by default.
3189         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3190     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3191         _type=cparser
3192         _ident=$($_cc --version | head -n1)
3193         _depflags='-MMD'
3194         _cflags_speed='-O4'
3195         _cflags_size='-O2'
3196         _flags_filter=cparser_flags
3197     fi
3198
3199     eval ${pfx}_type=\$_type
3200     eval ${pfx}_ident=\$_ident
3201 }
3202
3203 set_ccvars(){
3204     eval ${1}_C=\${_cc_c-\${${1}_C}}
3205     eval ${1}_E=\${_cc_e-\${${1}_E}}
3206     eval ${1}_O=\${_cc_o-\${${1}_O}}
3207
3208     if [ -n "$_depflags" ]; then
3209         eval ${1}_DEPFLAGS=\$_depflags
3210     else
3211         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3212         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3213         eval DEP${1}FLAGS=\$_flags
3214     fi
3215 }
3216
3217 probe_cc cc "$cc"
3218 cflags_filter=$_flags_filter
3219 cflags_speed=$_cflags_speed
3220 cflags_size=$_cflags_size
3221 cflags_noopt=$_cflags_noopt
3222 add_cflags $_flags $_cflags
3223 cc_ldflags=$_ldflags
3224 set_ccvars CC
3225
3226 probe_cc hostcc "$host_cc"
3227 host_cflags_filter=$_flags_filter
3228 add_host_cflags  $_flags $_cflags
3229 set_ccvars HOSTCC
3230
3231 test -n "$cc_type" && enable $cc_type ||
3232     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3233
3234 : ${as_default:=$cc}
3235 : ${objcc_default:=$cc}
3236 : ${dep_cc_default:=$cc}
3237 : ${ld_default:=$cc}
3238 : ${host_ld_default:=$host_cc}
3239 set_default ar as objcc dep_cc ld host_ld
3240
3241 probe_cc as "$as"
3242 asflags_filter=$_flags_filter
3243 add_asflags $_flags $_cflags
3244 set_ccvars AS
3245
3246 probe_cc objcc "$objcc"
3247 objcflags_filter=$_flags_filter
3248 add_objcflags $_flags $_cflags
3249 set_ccvars OBJC
3250
3251 probe_cc ld "$ld"
3252 ldflags_filter=$_flags_filter
3253 add_ldflags $_flags $_ldflags
3254 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3255 LD_O=${_ld_o-$LD_O}
3256 LD_LIB=${_ld_lib-$LD_LIB}
3257 LD_PATH=${_ld_path-$LD_PATH}
3258
3259 probe_cc hostld "$host_ld"
3260 host_ldflags_filter=$_flags_filter
3261 add_host_ldflags $_flags $_ldflags
3262 HOSTLD_O=${_ld_o-$HOSTLD_O}
3263
3264 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3265     probe_cc depcc "$dep_cc"
3266     CCDEP=${_DEPCMD:-$DEPCMD}
3267     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3268     DEPCCFLAGS=$_flags
3269 fi
3270
3271 if $ar 2>&1 | grep -q Microsoft; then
3272     arflags="-nologo"
3273     ar_o='-out:$@'
3274 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3275     arflags="rq"
3276     ar_o='$@'
3277 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3278     arflags='-Xany -r -c'
3279     ar_o='$@'
3280 else
3281     arflags="rc"
3282     ar_o='$@'
3283 fi
3284
3285 add_cflags $extra_cflags
3286 add_objcflags $extra_objcflags
3287 add_asflags $extra_cflags
3288
3289 if test -n "$sysroot"; then
3290     case "$cc_type" in
3291         gcc|llvm_gcc|clang)
3292             add_cppflags --sysroot="$sysroot"
3293             add_ldflags --sysroot="$sysroot"
3294         ;;
3295         tms470)
3296             add_cppflags -I"$sysinclude"
3297             add_ldflags  --sysroot="$sysroot"
3298         ;;
3299     esac
3300 fi
3301
3302 if test "$cpu" = host; then
3303     enabled cross_compile &&
3304         die "--cpu=host makes no sense when cross-compiling."
3305
3306     case "$cc_type" in
3307         gcc|llvm_gcc)
3308             check_native(){
3309                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3310                 sed -n "/cc1.*$1=/{
3311                             s/.*$1=\\([^ ]*\\).*/\\1/
3312                             p
3313                             q
3314                         }" $TMPE
3315             }
3316             cpu=$(check_native -march || check_native -mcpu)
3317         ;;
3318     esac
3319
3320     test "${cpu:-host}" = host &&
3321         die "--cpu=host not supported with compiler $cc"
3322 fi
3323
3324 # Deal with common $arch aliases
3325 case "$arch" in
3326     aarch64|arm64)
3327         arch="aarch64"
3328     ;;
3329     arm*)
3330         arch="arm"
3331     ;;
3332     mips*|IP*)
3333         case "$arch" in
3334         *el)
3335             add_cppflags -EL
3336             add_ldflags -EL
3337         ;;
3338         *eb)
3339             add_cppflags -EB
3340             add_ldflags -EB
3341         ;;
3342         esac
3343         arch="mips"
3344     ;;
3345     parisc*|hppa*)
3346         arch="parisc"
3347     ;;
3348     "Power Macintosh"|ppc*|powerpc*)
3349         arch="ppc"
3350     ;;
3351     s390|s390x)
3352         arch="s390"
3353     ;;
3354     sh4|sh)
3355         arch="sh4"
3356     ;;
3357     sun4u|sparc*)
3358         arch="sparc"
3359     ;;
3360     tilegx|tile-gx)
3361         arch="tilegx"
3362     ;;
3363     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3364         arch="x86"
3365     ;;
3366 esac
3367
3368 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3369 enable $arch
3370
3371 # Add processor-specific flags
3372 if enabled aarch64; then
3373
3374     case $cpu in
3375         armv*)
3376             cpuflags="-march=$cpu"
3377         ;;
3378         *)
3379             cpuflags="-mcpu=$cpu"
3380         ;;
3381     esac
3382
3383 elif enabled alpha; then
3384
3385     cpuflags="-mcpu=$cpu"
3386
3387 elif enabled arm; then
3388
3389     check_arm_arch() {
3390         check_cpp_condition stddef.h \
3391             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3392             $cpuflags
3393     }
3394
3395     probe_arm_arch() {
3396         if   check_arm_arch 4;        then echo armv4;
3397         elif check_arm_arch 4T;       then echo armv4t;
3398         elif check_arm_arch 5;        then echo armv5;
3399         elif check_arm_arch 5E;       then echo armv5e;
3400         elif check_arm_arch 5T;       then echo armv5t;
3401         elif check_arm_arch 5TE;      then echo armv5te;
3402         elif check_arm_arch 5TEJ;     then echo armv5te;
3403         elif check_arm_arch 6;        then echo armv6;
3404         elif check_arm_arch 6J;       then echo armv6j;
3405         elif check_arm_arch 6K;       then echo armv6k;
3406         elif check_arm_arch 6Z;       then echo armv6z;
3407         elif check_arm_arch 6ZK;      then echo armv6zk;
3408         elif check_arm_arch 6T2;      then echo armv6t2;
3409         elif check_arm_arch 7;        then echo armv7;
3410         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3411         elif check_arm_arch 7S;       then echo armv7-a;
3412         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3413         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3414         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3415         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3416         fi
3417     }
3418
3419     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3420
3421     case $cpu in
3422         armv*)
3423             cpuflags="-march=$cpu"
3424             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3425         ;;
3426         *)
3427             cpuflags="-mcpu=$cpu"
3428             case $cpu in
3429                 cortex-a*)                               subarch=armv7a  ;;
3430                 cortex-r*)                               subarch=armv7r  ;;
3431                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3432                 arm11*)                                  subarch=armv6   ;;
3433                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3434                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3435                 *)                             subarch=$(probe_arm_arch) ;;
3436             esac
3437         ;;
3438     esac
3439
3440     case "$subarch" in
3441         armv5t*)    enable fast_clz                ;;
3442         armv[6-8]*) enable fast_clz fast_unaligned ;;
3443     esac
3444
3445 elif enabled avr32; then
3446
3447     case $cpu in
3448         ap7[02]0[0-2])
3449             subarch="avr32_ap"
3450             cpuflags="-mpart=$cpu"
3451         ;;
3452         ap)
3453             subarch="avr32_ap"
3454             cpuflags="-march=$cpu"
3455         ;;
3456         uc3[ab]*)
3457             subarch="avr32_uc"
3458             cpuflags="-mcpu=$cpu"
3459         ;;
3460         uc)
3461             subarch="avr32_uc"
3462             cpuflags="-march=$cpu"
3463         ;;
3464     esac
3465
3466 elif enabled bfin; then
3467
3468     cpuflags="-mcpu=$cpu"
3469
3470 elif enabled mips; then
3471
3472     cpuflags="-march=$cpu"
3473
3474 elif enabled ppc; then
3475
3476     disable ldbrx
3477
3478     case $(tolower $cpu) in
3479         601|ppc601|powerpc601)
3480             cpuflags="-mcpu=601"
3481             disable altivec
3482         ;;
3483         603*|ppc603*|powerpc603*)
3484             cpuflags="-mcpu=603"
3485             disable altivec
3486         ;;
3487         604*|ppc604*|powerpc604*)
3488             cpuflags="-mcpu=604"
3489             disable altivec
3490         ;;
3491         g3|75*|ppc75*|powerpc75*)
3492             cpuflags="-mcpu=750"
3493             disable altivec
3494         ;;
3495         g4|745*|ppc745*|powerpc745*)
3496             cpuflags="-mcpu=7450"
3497             disable vsx
3498         ;;
3499         74*|ppc74*|powerpc74*)
3500             cpuflags="-mcpu=7400"
3501             disable vsx
3502         ;;
3503         g5|970|ppc970|powerpc970)
3504             cpuflags="-mcpu=970"
3505             disable vsx
3506         ;;
3507         power[3-6]*)
3508             cpuflags="-mcpu=$cpu"
3509             disable vsx
3510         ;;
3511         power[7-8]*)
3512             cpuflags="-mcpu=$cpu"
3513             enable ldbrx
3514         ;;
3515         cell)
3516             cpuflags="-mcpu=cell"
3517             enable ldbrx
3518             disable vsx
3519         ;;
3520         e500mc)
3521             cpuflags="-mcpu=e500mc"
3522             disable altivec
3523         ;;
3524         e500v2)
3525             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3526             disable altivec
3527             disable dcbzl
3528         ;;
3529         e500)
3530             cpuflags="-mcpu=8540 -mhard-float"
3531             disable altivec
3532             disable dcbzl
3533         ;;
3534     esac
3535
3536 elif enabled sparc; then
3537
3538     case $cpu in
3539         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3540             cpuflags="-mcpu=$cpu"
3541         ;;
3542         ultrasparc*|niagara[234])
3543             cpuflags="-mcpu=$cpu"
3544         ;;
3545     esac
3546
3547 elif enabled x86; then
3548
3549     case $cpu in
3550         i[345]86|pentium)
3551             cpuflags="-march=$cpu"
3552             disable i686
3553             disable mmx
3554         ;;
3555         # targets that do NOT support nopl and conditional mov (cmov)
3556         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3557             cpuflags="-march=$cpu"
3558             disable i686
3559         ;;
3560         # targets that do support nopl and conditional mov (cmov)
3561         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3562             cpuflags="-march=$cpu"
3563             enable i686
3564             enable fast_cmov
3565         ;;
3566         # targets that do support conditional mov but on which it's slow
3567         pentium4|pentium4m|prescott|nocona)
3568             cpuflags="-march=$cpu"
3569             enable i686
3570             disable fast_cmov
3571         ;;
3572     esac
3573
3574 fi
3575
3576 if [ "$cpu" != generic ]; then
3577     add_cflags  $cpuflags
3578     add_asflags $cpuflags
3579     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3580 fi
3581
3582 # compiler sanity check
3583 check_exec <<EOF
3584 int main(void){ return 0; }
3585 EOF
3586 if test "$?" != 0; then
3587     echo "$cc is unable to create an executable file."
3588     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3589         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3590         echo "Only do this if you know what cross compiling means."
3591     fi
3592     die "C compiler test failed."
3593 fi
3594
3595 add_cppflags -D_ISOC99_SOURCE
3596 check_cflags -std=c99
3597 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3598 #include <stdlib.h>
3599 EOF
3600 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3601 #include <stdlib.h>
3602 EOF
3603
3604 add_host_cppflags -D_ISOC99_SOURCE
3605 check_host_cflags -std=c99
3606 check_host_cflags -Wall
3607 check_host_cflags -O3
3608
3609 check_64bit(){
3610     arch32=$1
3611     arch64=$2
3612     expr=$3
3613     check_code cc "" "int test[2*($expr) - 1]" &&
3614         subarch=$arch64 || subarch=$arch32
3615 }
3616
3617 case "$arch" in
3618     aarch64|alpha|ia64)
3619         spic=$shared
3620     ;;
3621     mips)
3622         check_64bit mips mips64 '_MIPS_SIM > 1'
3623         spic=$shared
3624     ;;
3625     parisc)
3626         check_64bit parisc parisc64 'sizeof(void *) > 4'
3627         spic=$shared
3628     ;;
3629     ppc)
3630         check_64bit ppc ppc64 'sizeof(void *) > 4'
3631         spic=$shared
3632     ;;
3633     s390)
3634         check_64bit s390 s390x 'sizeof(void *) > 4'
3635         spic=$shared
3636     ;;
3637     sparc)
3638         check_64bit sparc sparc64 'sizeof(void *) > 4'
3639         spic=$shared
3640     ;;
3641     x86)
3642         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3643         if test "$subarch" = "x86_64"; then
3644             spic=$shared
3645         fi
3646     ;;
3647 esac
3648
3649 enable $subarch
3650 enabled spic && enable_weak pic
3651
3652 # OS specific
3653 case $target_os in
3654     aix)
3655         SHFLAGS=-shared
3656         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3657         enabled shared && add_ldflags -Wl,-brtl
3658         ;;
3659     android)
3660         disable symver
3661         enable section_data_rel_ro
3662         SLIB_INSTALL_NAME='$(SLIBNAME)'
3663         SLIB_INSTALL_LINKS=
3664         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3665         ;;
3666     haiku)
3667         prefix_default="/boot/common"
3668         network_extralibs="-lnetwork"
3669         host_libs=
3670         ;;
3671     sunos)
3672         SHFLAGS='-shared -Wl,-h,$$(@F)'
3673         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3674         network_extralibs="-lsocket -lnsl"
3675         # When using suncc to build, the Solaris linker will mark
3676         # an executable with each instruction set encountered by
3677         # the Solaris assembler.  As our libraries contain their own
3678         # guards for processor-specific code, instead suppress
3679         # generation of the HWCAPS ELF section on Solaris x86 only.
3680         enabled_all suncc x86 &&
3681             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3682             add_ldflags -Wl,-M,mapfile
3683         nm_default='nm -P -g'
3684         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3685         ;;
3686     netbsd)
3687         disable symver
3688         oss_indev_extralibs="-lossaudio"
3689         oss_outdev_extralibs="-lossaudio"
3690         ;;
3691     openbsd|bitrig)
3692         disable symver
3693         SHFLAGS='-shared'
3694         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3695         SLIB_INSTALL_LINKS=
3696         oss_indev_extralibs="-lossaudio"
3697         oss_outdev_extralibs="-lossaudio"
3698         ;;
3699     dragonfly)
3700         disable symver
3701         ;;
3702     freebsd)
3703         ;;
3704     bsd/os)
3705         add_extralibs -lpoll -lgnugetopt
3706         ;;
3707     darwin)
3708         enabled ppc && add_asflags -force_cpusubtype_ALL
3709         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3710         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3711         add_ldflags -Wl,-dynamic,-search_paths_first
3712         SLIBSUF=".dylib"
3713         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3714         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3715         objformat="macho"
3716         enabled x86_64 && objformat="macho64"
3717         enabled_any pic shared ||
3718             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3719         ;;
3720     msys*)
3721         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3722         ;;
3723     mingw32*|mingw64*)
3724         if test $target_os = "mingw32ce"; then
3725             disable network
3726         else
3727             target_os=mingw32
3728         fi
3729         LIBTARGET=i386
3730         if enabled x86_64; then
3731             LIBTARGET="i386:x86-64"
3732         elif enabled arm; then
3733             LIBTARGET=arm-wince
3734         fi
3735         check_ldflags -Wl,--nxcompat
3736         check_ldflags -Wl,--dynamicbase
3737         shlibdir_default="$bindir_default"
3738         SLIBPREF=""
3739         SLIBSUF=".dll"
3740         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3741         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3742         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3743         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3744         SLIB_INSTALL_LINKS=
3745         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3746         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3747         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3748         objformat="win32"
3749         dlltool="${cross_prefix}dlltool"
3750         ranlib=:
3751         enable dos_paths
3752         ;;
3753     win32|win64)
3754         disable symver
3755         if enabled shared; then
3756             # Link to the import library instead of the normal static library
3757             # for shared libs.
3758             LD_LIB='%.lib'
3759             # Cannot build both shared and static libs with MSVC or icl.
3760             disable static
3761         fi
3762         shlibdir_default="$bindir_default"
3763         SLIBPREF=""
3764         SLIBSUF=".dll"
3765         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3766         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3767         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3768         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3769         SLIB_INSTALL_LINKS=
3770         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3771         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3772         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3773         objformat="win32"
3774         ranlib=:
3775         enable dos_paths
3776         ;;
3777     cygwin*)
3778         target_os=cygwin
3779         shlibdir_default="$bindir_default"
3780         SLIBPREF="cyg"
3781         SLIBSUF=".dll"
3782         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3783         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3784         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3785         SLIB_INSTALL_LINKS=
3786         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3787         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3788         objformat="win32"
3789         enable dos_paths
3790         ;;
3791     *-dos|freedos|opendos)
3792         network_extralibs="-lsocket"
3793         objformat="coff"
3794         enable dos_paths
3795         add_cppflags -U__STRICT_ANSI__
3796         ;;
3797     linux)
3798         enable dv1394
3799         enable section_data_rel_ro
3800         ;;
3801     irix*)
3802         target_os=irix
3803         ranlib="echo ignoring ranlib"
3804         ;;
3805     os/2*)
3806         ln_s="cp -f"
3807         objformat="aout"
3808         add_cppflags -D_GNU_SOURCE
3809         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3810         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3811         LIBSUF="_s.a"
3812         SLIBPREF=""
3813         SLIBSUF=".dll"
3814         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3815         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3816         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3817             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3818             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3819             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3820             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3821         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3822             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3823         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3824         enable dos_paths
3825         ;;
3826     gnu/kfreebsd)
3827         add_cppflags -D_BSD_SOURCE
3828         ;;
3829     gnu)
3830         ;;
3831     qnx)
3832         add_cppflags -D_QNX_SOURCE
3833         network_extralibs="-lsocket"
3834         ;;
3835     symbian)
3836         SLIBSUF=".dll"
3837         enable dos_paths
3838         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3839         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3840         add_ldflags -Wl,--target1-abs,--no-undefined \
3841                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3842                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3843         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3844                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3845                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3846         ;;
3847     osf1)
3848         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3849         ;;
3850     minix)
3851         ;;
3852     plan9)
3853         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3854                      -D_REENTRANT_SOURCE        \
3855                      -D_RESEARCH_SOURCE         \
3856                      -DFD_SETSIZE=96            \
3857                      -DHAVE_SOCK_OPTS
3858         add_compat strtod.o strtod=avpriv_strtod
3859         network_extralibs='-lbsd'
3860         exeobjs=compat/plan9/main.o
3861         cp_f='cp'
3862         ;;
3863     none)
3864         ;;
3865     *)
3866         die "Unknown OS '$target_os'."
3867         ;;
3868 esac
3869
3870 # determine libc flavour
3871
3872 probe_libc(){
3873     pfx=$1
3874     pfx_no_=${pfx%_}
3875     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3876     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3877         eval ${pfx}libc_type=uclibc
3878         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3879     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3880         eval ${pfx}libc_type=glibc
3881         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3882     # MinGW headers can be installed on Cygwin, so check for newlib first.
3883     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3884         eval ${pfx}libc_type=newlib
3885         add_${pfx}cppflags -U__STRICT_ANSI__
3886     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3887     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3888         eval ${pfx}libc_type=mingw64
3889         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3890         eval test \$${pfx_no_}cc_type = "gcc" &&
3891             add_${pfx}cppflags -D__printf__=__gnu_printf__
3892     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3893          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3894         eval ${pfx}libc_type=mingw32
3895         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3896             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3897             die "ERROR: MinGW32 runtime version must be >= 3.15."
3898         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3899         eval test \$${pfx_no_}cc_type = "gcc" &&
3900             add_${pfx}cppflags -D__printf__=__gnu_printf__
3901     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3902         eval ${pfx}libc_type=msvcrt
3903         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3904             if [ "$pfx" = host_ ]; then
3905                 add_host_cppflags -Dsnprintf=_snprintf
3906             else
3907                 add_compat strtod.o strtod=avpriv_strtod
3908                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3909                                              _snprintf=avpriv_snprintf  \
3910                                              vsnprintf=avpriv_vsnprintf
3911             fi
3912         fi
3913         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3914         # 0x601 by default unless something else is set by the user.
3915         # This can easily lead to us detecting functions only present
3916         # in such new versions and producing binaries requiring windows 7.0.
3917         # Therefore explicitly set the default to XP unless the user has
3918         # set something else on the command line.
3919         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3920         # family. For these cases, configure is free to use any functions
3921         # found in the SDK headers by default. (Alternatively, we could force
3922         # _WIN32_WINNT to 0x0602 in that case.)
3923         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3924             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3925 #ifdef WINAPI_FAMILY
3926 #include <winapifamily.h>
3927 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3928 #error not desktop
3929 #endif
3930 #endif
3931 EOF
3932     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3933         eval ${pfx}libc_type=klibc
3934     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3935         eval ${pfx}libc_type=bionic
3936     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3937         eval ${pfx}libc_type=solaris
3938         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3939     else
3940         eval ${pfx}libc_type=default
3941         add_${pfx}cppflags -D_DEFAULT_SOURCE
3942     fi
3943 }
3944
3945 probe_libc
3946 test -n "$libc_type" && enable libc_$libc_type
3947 probe_libc host_
3948 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3949
3950 case $libc_type in
3951     bionic)
3952         add_compat strtod.o strtod=avpriv_strtod
3953         ;;
3954 esac
3955
3956 # hacks for compiler/libc/os combinations
3957
3958 if enabled_all tms470 libc_glibc; then
3959     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3960     add_cppflags -D__USER_LABEL_PREFIX__=
3961     add_cppflags -D__builtin_memset=memset
3962     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3963     add_cflags   -pds=48    # incompatible redefinition of macro
3964 fi
3965
3966 if enabled_all ccc libc_glibc; then
3967     add_ldflags -Wl,-z,now  # calls to libots crash without this
3968 fi
3969
3970 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3971     add_cppflags '-I\$(SRC_PATH)/compat/float'
3972
3973 esc(){
3974     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3975 }
3976
3977 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3978
3979 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3980
3981 set_default $PATHS_LIST
3982 set_default nm
3983
3984 # we need to build at least one lib type
3985 if ! enabled_any static shared; then
3986     cat <<EOF
3987 At least one library type must be built.
3988 Specify --enable-static to build the static libraries or --enable-shared to
3989 build the shared libraries as well. To only build the shared libraries specify
3990 --disable-static in addition to --enable-shared.
3991 EOF
3992     exit 1;
3993 fi
3994
3995 die_license_disabled() {
3996     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3997 }
3998
3999 die_license_disabled gpl libcdio
4000 die_license_disabled gpl libx264
4001 die_license_disabled gpl libx265
4002 die_license_disabled gpl libxavs
4003 die_license_disabled gpl libxvid
4004 die_license_disabled gpl x11grab
4005
4006 die_license_disabled nonfree cuda
4007 die_license_disabled nonfree libfaac
4008 die_license_disabled nonfree libfdk_aac
4009 die_license_disabled nonfree nvenc
4010 die_license_disabled nonfree openssl
4011
4012 die_license_disabled version3 libopencore_amrnb
4013 die_license_disabled version3 libopencore_amrwb
4014 die_license_disabled version3 libvo_aacenc
4015 die_license_disabled version3 libvo_amrwbenc
4016
4017 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4018
4019 disabled optimizations || check_cflags -fomit-frame-pointer
4020
4021 enable_weak_pic() {
4022     disabled pic && return
4023     enable pic
4024     add_cppflags -DPIC
4025     case "$target_os" in
4026     mingw*|cygwin*)
4027         ;;
4028     *)
4029         add_cflags -fPIC
4030         ;;
4031     esac
4032     add_asflags  -fPIC
4033 }
4034
4035 enabled pic && enable_weak_pic
4036
4037 check_cc <<EOF || die "Symbol mangling check failed."
4038 int ff_extern;
4039 EOF
4040 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4041 extern_prefix=${sym%%ff_extern*}
4042
4043 check_cc <<EOF && enable_weak inline_asm
4044 void foo(void) { __asm__ volatile ("" ::); }
4045 EOF
4046
4047 _restrict=
4048 for restrict_keyword in restrict __restrict__ __restrict; do
4049     check_cc <<EOF && _restrict=$restrict_keyword && break
4050 void foo(char * $restrict_keyword p);
4051 EOF
4052 done
4053
4054 check_cc <<EOF && enable pragma_deprecated
4055 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4056 EOF
4057
4058 check_cc <<EOF && enable attribute_packed
4059 struct { int x; } __attribute__((packed)) x;
4060 EOF
4061
4062 check_cc <<EOF && enable attribute_may_alias
4063 union { int x; } __attribute__((may_alias)) x;
4064 EOF
4065
4066 check_cc <<EOF || die "endian test failed"
4067 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4068 EOF
4069 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4070
4071 check_gas() {
4072     log "check_gas using '$as' as AS"
4073     # :vararg is used on aarch64, arm and ppc altivec
4074     check_as <<EOF || return 1
4075 .macro m n, y:vararg=0
4076 \n: .int \y
4077 .endm
4078 m x
4079 EOF
4080     # .altmacro is only used in arm asm
4081     ! enabled arm || check_as <<EOF || return 1
4082 .altmacro
4083 EOF
4084     enable gnu_as
4085     return 0
4086 }
4087
4088 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4089     nogas=:
4090     enabled_any arm aarch64 && nogas=die
4091     enabled_all ppc altivec && nogas=warn
4092     as_noop=-v
4093
4094     case $as_type in
4095         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4096         gcc)  gaspp_as_type=gas ;;
4097         *)    gaspp_as_type=$as_type ;;
4098     esac
4099
4100     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4101
4102     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4103         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4104
4105     if ! check_gas ; then
4106         as=${gas:=$as}
4107         check_gas || \
4108             $nogas "GNU assembler not found, install/update gas-preprocessor"
4109     fi
4110
4111     check_as <<EOF && enable as_func
4112 .func test
4113 .endfunc
4114 EOF
4115 fi
4116
4117 check_inline_asm inline_asm_labels '"1:\n"'
4118
4119 if enabled aarch64; then
4120     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4121     # internal assembler in clang 3.3 does not support this instruction
4122     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4123     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4124
4125     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4126
4127 elif enabled alpha; then
4128
4129     check_cflags -mieee
4130
4131 elif enabled arm; then
4132
4133     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4134     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4135     enabled thumb && check_cflags -mthumb || check_cflags -marm
4136
4137     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4138         enable vfp_args
4139     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4140         enable vfp_args
4141     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4142         case "${cross_prefix:-$cc}" in
4143             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4144             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4145 __asm__ (".eabi_attribute 28, 1");
4146 int main(void) { return 0; }
4147 EOF
4148         esac
4149         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4150     fi
4151
4152     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4153     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4154     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4155     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4156     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4157     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4158
4159     [ $target_os = linux ] || [ $target_os = android ] ||
4160         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4161             $ARCH_EXT_LIST_ARM
4162
4163     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4164
4165     check_as <<EOF && enable as_dn_directive
4166 ra .dn d0.i16
4167 .unreq ra
4168 EOF
4169
4170     # llvm's integrated assembler supports .object_arch from llvm 3.5
4171     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4172 .object_arch armv4
4173 EOF
4174
4175     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4176
4177 elif enabled mips; then
4178
4179     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4180
4181     # make sure that only an instruction set is enabled
4182     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4183
4184     if enabled mips64; then
4185         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4186             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4187                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4188     else
4189         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4190             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4191                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4192     fi
4193
4194 elif enabled parisc; then
4195
4196     if enabled gcc; then
4197         case $($cc -dumpversion) in
4198             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4199         esac
4200     fi
4201
4202 elif enabled ppc; then
4203
4204     enable local_aligned_8 local_aligned_16
4205
4206     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4207     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4208     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4209     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4210
4211     # AltiVec flags: The FSF version of GCC differs from the Apple version
4212     if enabled altivec; then
4213         check_cflags -maltivec -mabi=altivec &&
4214         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4215         check_cflags -faltivec
4216
4217         # check if our compiler supports Motorola AltiVec C API
4218         check_cc <<EOF || disable altivec
4219 $inc_altivec_h
4220 int main(void) {
4221     vector signed int v1 = (vector signed int) { 0 };
4222     vector signed int v2 = (vector signed int) { 1 };
4223     v1 = vec_add(v1, v2);
4224     return 0;
4225 }
4226 EOF
4227
4228         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4229     fi
4230
4231     if enabled vsx; then
4232         check_cflags -mvsx &&
4233         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4234     fi
4235
4236     if enabled power8; then
4237         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4238     fi
4239
4240 elif enabled x86; then
4241
4242     check_builtin rdtsc    intrin.h   "__rdtsc()"
4243     check_builtin mm_empty mmintrin.h "_mm_empty()"
4244
4245     enable local_aligned_8 local_aligned_16
4246
4247     # check whether EBP is available on x86
4248     # As 'i' is stored on the stack, this program will crash
4249     # if the base pointer is used to access it because the
4250     # base pointer is cleared in the inline assembly code.
4251     check_exec_crash <<EOF && enable ebp_available
4252 volatile int i=0;
4253 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4254 return i;
4255 EOF
4256
4257     # check whether EBX is available on x86
4258     check_inline_asm ebx_available '""::"b"(0)' &&
4259         check_inline_asm ebx_available '"":::"%ebx"'
4260
4261     # check whether xmm clobbers are supported
4262     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4263
4264     # check whether binutils is new enough to compile SSSE3/MMXEXT
4265     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4266     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4267
4268     if ! disabled_any asm mmx yasm; then
4269         if check_cmd $yasmexe --version; then
4270             enabled x86_64 && yasm_extra="-m amd64"
4271             yasm_debug="-g dwarf2"
4272         elif check_cmd nasm -v; then
4273             yasmexe=nasm
4274             yasm_debug="-g -F dwarf"
4275             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4276         fi
4277
4278         YASMFLAGS="-f $objformat $yasm_extra"
4279         enabled pic               && append YASMFLAGS "-DPIC"
4280         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4281         case "$objformat" in
4282             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4283         esac
4284
4285         check_yasm "movbe ecx, [5]" && enable yasm ||
4286             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4287         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4288         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4289         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4290         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4291         check_yasm "CPU amdnop" || disable cpunop
4292     fi
4293
4294     case "$cpu" in
4295         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4296             disable fast_clz
4297         ;;
4298     esac
4299
4300 fi
4301
4302 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4303
4304 check_ldflags -Wl,--as-needed
4305
4306 if check_func dlopen; then
4307     ldl=
4308 elif check_func dlopen -ldl; then
4309     ldl=-ldl
4310 fi
4311
4312 if ! disabled network; then
4313     check_func getaddrinfo $network_extralibs
4314     check_func inet_aton $network_extralibs
4315
4316     check_type netdb.h "struct addrinfo"
4317     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4318     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4319     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4320     check_type poll.h "struct pollfd"
4321     check_type netinet/sctp.h "struct sctp_event_subscribe"
4322     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4323     check_type netinet/in.h "struct sockaddr_in6"
4324     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4325     check_type "sys/types.h sys/socket.h" socklen_t
4326
4327     # Prefer arpa/inet.h over winsock2
4328     if check_header arpa/inet.h ; then
4329         check_func closesocket
4330     elif check_header winsock2.h ; then
4331         check_func_headers winsock2.h closesocket -lws2 &&
4332             network_extralibs="-lws2" ||
4333         { check_func_headers winsock2.h closesocket -lws2_32 &&
4334             network_extralibs="-lws2_32"; } || disable winsock2_h network
4335         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4336
4337         check_type ws2tcpip.h socklen_t
4338         check_type ws2tcpip.h "struct addrinfo"
4339         check_type ws2tcpip.h "struct group_source_req"
4340         check_type ws2tcpip.h "struct ip_mreq_source"
4341         check_type ws2tcpip.h "struct ipv6_mreq"
4342         check_type winsock2.h "struct pollfd"
4343         check_struct winsock2.h "struct sockaddr" sa_len
4344         check_type ws2tcpip.h "struct sockaddr_in6"
4345         check_type ws2tcpip.h "struct sockaddr_storage"
4346     else
4347         disable network
4348     fi
4349 fi
4350
4351 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4352 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4353 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4354 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4355
4356 case "$custom_allocator" in
4357     jemalloc)
4358         # jemalloc by default does not use a prefix
4359         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4360     ;;
4361     tcmalloc)
4362         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4363         malloc_prefix=tc_
4364     ;;
4365 esac
4366
4367 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4368 check_func  ${malloc_prefix}memalign            && enable memalign
4369 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4370
4371 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4372     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4373
4374 check_func  fcntl
4375 check_func  fork
4376 check_func  gethrtime
4377 check_func  getopt
4378 check_func  getrusage
4379 check_func  gettimeofday
4380 check_func  gmtime_r
4381 check_func  isatty
4382 check_func  localtime_r
4383 check_func  mach_absolute_time
4384 check_func  mkstemp
4385 check_func  mmap
4386 check_func  mprotect
4387 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4388 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4389 check_func  sched_getaffinity
4390 check_func  setrlimit
4391 check_func  strerror_r
4392 check_func  sysconf
4393 check_func  sysctl
4394 check_func  usleep
4395
4396 check_func_headers io.h setmode
4397 check_func_headers stdlib.h getenv
4398
4399 check_func_headers windows.h CoTaskMemFree -lole32
4400 check_func_headers windows.h GetProcessAffinityMask
4401 check_func_headers windows.h GetProcessTimes
4402 check_func_headers windows.h GetSystemTimeAsFileTime
4403 check_func_headers windows.h LoadLibrary
4404 check_func_headers windows.h MapViewOfFile
4405 check_func_headers windows.h SetConsoleTextAttribute
4406 check_func_headers windows.h Sleep
4407 check_func_headers windows.h VirtualAlloc
4408 check_struct windows.h "CONDITION_VARIABLE" Ptr
4409
4410 check_header direct.h
4411 check_header dlfcn.h
4412 check_header d3d11.h
4413 check_header dxva.h
4414 check_header dxva2api.h
4415 check_header io.h
4416 check_header mach/mach_time.h
4417 check_header malloc.h
4418 check_header poll.h
4419 check_header sys/mman.h
4420 check_header sys/param.h
4421 check_header sys/resource.h
4422 check_header sys/select.h
4423 check_header sys/time.h
4424 check_header sys/un.h
4425 check_header unistd.h
4426 check_header valgrind/valgrind.h
4427 check_header vdpau/vdpau.h
4428 check_header vdpau/vdpau_x11.h
4429 check_header VideoDecodeAcceleration/VDADecoder.h
4430 check_header windows.h
4431 check_header X11/extensions/XvMClib.h
4432
4433 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4434 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4435 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4436
4437 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4438
4439 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4440 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4441 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4442
4443 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4444
4445 if ! disabled w32threads && ! enabled pthreads; then
4446     check_func_headers "windows.h process.h" _beginthreadex &&
4447         enable w32threads || disable w32threads
4448 fi
4449
4450 # check for some common methods of building with pthread support
4451 # do this before the optional library checks as some of them require pthreads
4452 if ! disabled pthreads && ! enabled w32threads; then
4453     enable pthreads
4454     if check_func pthread_join -pthread; then
4455         add_cflags -pthread
4456         add_extralibs -pthread
4457     elif check_func pthread_join -pthreads; then
4458         add_cflags -pthreads
4459         add_extralibs -pthreads
4460     elif check_func pthread_join -lpthreadGC2; then
4461         add_extralibs -lpthreadGC2
4462     elif check_lib pthread.h pthread_join -lpthread; then
4463         :
4464     elif ! check_func pthread_join; then
4465         disable pthreads
4466     fi
4467 fi
4468
4469 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4470 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4471
4472 check_lib math.h sin -lm && LIBM="-lm"
4473 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4474
4475 atan2f_args=2
4476 ldexpf_args=2
4477 powf_args=2
4478
4479 for func in $MATH_FUNCS; do
4480     eval check_mathfunc $func \${${func}_args:-1}
4481 done
4482
4483 # these are off by default, so fail if requested and not available
4484 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4485                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4486                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4487 enabled cuda              && check_lib cuda.h cuInit -lcuda
4488 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4489 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4490 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4491 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4492 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4493 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4494 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4495 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4496 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4497                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4498                                done || die "ERROR: libgsm not found"; }
4499 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4500 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4501 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4502 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4503 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4504 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4505 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4506 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4507 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4508                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4509 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4510 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4511 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4512 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4513 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4514 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4515 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4516 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4517 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4518 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4519 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4520 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4521     enabled libvpx_vp8_decoder && {
4522         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4523             disable libvpx_vp8_decoder;
4524     }
4525     enabled libvpx_vp8_encoder && {
4526         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4527             disable libvpx_vp8_encoder;
4528     }
4529     enabled libvpx_vp9_decoder && {
4530         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4531             disable libvpx_vp9_decoder;
4532     }
4533     enabled libvpx_vp9_encoder && {
4534         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4535             disable libvpx_vp9_encoder;
4536     }
4537     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4538         die "libvpx enabled but no supported decoders found"
4539     fi
4540 }
4541 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4542 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4543 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4544                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4545                                die "ERROR: libx264 version must be >= 0.118."; } &&
4546                              { check_cpp_condition x264.h "X264_MPEG2" &&
4547                                enable libx262; }
4548 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4549                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4550                                die "ERROR: libx265 version must be >= 57."; }
4551 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4552 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4553 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4554                                 { ! enabled cross_compile && {
4555                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4556                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4557                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4558                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4559                                die "ERROR: mmal not found"; }
4560 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4561                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4562                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4563                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4564                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4565                                die "ERROR: openssl not found"; }
4566
4567 if enabled gnutls; then
4568     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4569     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4570 fi
4571
4572 # libdc1394 check
4573 if enabled libdc1394; then
4574     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4575         enable libdc1394_2; } ||
4576     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4577         enable libdc1394_1; } ||
4578     die "ERROR: No version of libdc1394 found "
4579 fi
4580
4581 if enabled nvenc; then
4582     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found.";
4583     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4584     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4585         die "ERROR: NVENC API version 4 or older is not supported";
4586 fi
4587
4588 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4589     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4590     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4591     enable sdl
4592 fi
4593
4594 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4595 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4596
4597 check_header linux/fb.h
4598 check_header linux/videodev2.h
4599 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4600
4601 check_header AVFoundation/AVFoundation.h &&
4602     check_objcflags -fobjc-arc &&
4603     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4604     disable AVFoundation_AVFoundation_h
4605
4606 check_header sys/videoio.h
4607
4608 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4609 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4610 # w32api 3.12 had it defined wrong
4611 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4612
4613 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4614 { check_header dev/bktr/ioctl_meteor.h &&
4615   check_header dev/bktr/ioctl_bt848.h; } ||
4616 { check_header machine/ioctl_meteor.h &&
4617   check_header machine/ioctl_bt848.h; } ||
4618 { check_header dev/video/meteor/ioctl_meteor.h &&
4619   check_header dev/video/bktr/ioctl_bt848.h; } ||
4620 check_header dev/ic/bt8xx.h
4621
4622 check_header sndio.h
4623 check_header sys/soundcard.h
4624 check_header soundcard.h
4625
4626 enabled_any alsa_indev alsa_outdev &&
4627     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4628
4629 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4630     check_func jack_port_get_latency_range -ljack
4631
4632 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4633
4634 if enabled libcdio; then
4635     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4636     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4637     die "ERROR: No usable libcdio/cdparanoia found"
4638 fi
4639
4640 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4641
4642 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4643     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4644         enabled libxcb && die "ERROR: libxcb not found";
4645     } && disable x11grab && enable libxcb
4646
4647     disabled libxcb_shm ||
4648         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4649             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4650         } && check_header sys/shm.h && enable libxcb_shm
4651
4652     disabled libxcb_xfixes ||
4653         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4654             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4655         } && enable libxcb_xfixes
4656
4657     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4658     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4659 fi
4660
4661 if enabled x11grab; then
4662     enabled xlib || die "ERROR: Xlib not found"
4663     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4664     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4665 fi
4666
4667 enabled vaapi && enabled xlib &&
4668     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4669     enable vaapi_x11
4670
4671 enabled vdpau &&
4672     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4673     disable vdpau
4674
4675 enabled vdpau && enabled xlib &&
4676     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4677     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4678     enable vdpau_x11
4679
4680 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4681
4682 # add some useful compiler flags if supported
4683 check_cflags -Wdeclaration-after-statement
4684 check_cflags -Wall
4685 check_cflags -Wdisabled-optimization
4686 check_cflags -Wpointer-arith
4687 check_cflags -Wredundant-decls
4688 check_cflags -Wwrite-strings
4689 check_cflags -Wtype-limits
4690 check_cflags -Wundef
4691 check_cflags -Wmissing-prototypes
4692 check_cflags -Wstrict-prototypes
4693 enabled extra_warnings && check_cflags -Winline
4694 enabled extra_warnings && check_cflags -Wcast-qual
4695
4696 check_disable_warning(){
4697     warning_flag=-W${1#-Wno-}
4698     test_cflags $warning_flag && add_cflags $1
4699 }
4700
4701 check_disable_warning -Wno-parentheses
4702 check_disable_warning -Wno-switch
4703 check_disable_warning -Wno-format-zero-length
4704 check_disable_warning -Wno-pointer-sign
4705
4706 # add some linker flags
4707 check_ldflags -Wl,--warn-common
4708 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4709 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4710 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4711
4712 # add some strip flags
4713 # -wN '..@*' is more selective than -x, but not available everywhere.
4714 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4715
4716 enabled neon_clobber_test &&
4717     check_ldflags -Wl,--wrap,avcodec_open2              \
4718                   -Wl,--wrap,avcodec_decode_audio4      \
4719                   -Wl,--wrap,avcodec_decode_video2      \
4720                   -Wl,--wrap,avcodec_decode_subtitle2   \
4721                   -Wl,--wrap,avcodec_encode_audio2      \
4722                   -Wl,--wrap,avcodec_encode_video2      \
4723                   -Wl,--wrap,avcodec_encode_subtitle    \
4724                   -Wl,--wrap,avresample_convert ||
4725     disable neon_clobber_test
4726
4727 enabled xmm_clobber_test &&
4728     check_ldflags -Wl,--wrap,avcodec_open2              \
4729                   -Wl,--wrap,avcodec_decode_audio4      \
4730                   -Wl,--wrap,avcodec_decode_video2      \
4731                   -Wl,--wrap,avcodec_decode_subtitle2   \
4732                   -Wl,--wrap,avcodec_encode_audio2      \
4733                   -Wl,--wrap,avcodec_encode_video2      \
4734                   -Wl,--wrap,avcodec_encode_subtitle    \
4735                   -Wl,--wrap,avresample_convert         \
4736                   -Wl,--wrap,sws_scale ||
4737     disable xmm_clobber_test
4738
4739 echo "X { local: *; };" > $TMPV
4740 if test_ldflags -Wl,--version-script,$TMPV; then
4741     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4742 elif test_ldflags -Wl,-M,$TMPV; then
4743     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4744 fi
4745
4746 check_cc <<EOF && enable symver_asm_label
4747 void ff_foo(void) __asm__ ("av_foo@VERSION");
4748 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4749 EOF
4750     check_cc <<EOF && enable symver_gnu_asm
4751 __asm__(".symver ff_foo,av_foo@VERSION");
4752 void ff_foo(void) {}
4753 EOF
4754
4755 if [ -z "$optflags" ]; then
4756     if enabled small; then
4757         optflags=$cflags_size
4758     elif enabled optimizations; then
4759         optflags=$cflags_speed
4760     else
4761         optflags=$cflags_noopt
4762     fi
4763 fi
4764
4765 check_optflags(){
4766     check_cflags "$@"
4767     enabled lto && check_ldflags "$@"
4768 }
4769
4770
4771 if enabled lto; then
4772     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4773     check_cflags  -flto
4774     check_ldflags -flto $cpuflags
4775 fi
4776
4777 check_optflags $optflags
4778 check_optflags -fno-math-errno
4779 check_optflags -fno-signed-zeros
4780
4781 if enabled icc; then
4782     # Just warnings, no remarks
4783     check_cflags -w1
4784     # -wd: Disable following warnings
4785     # 144, 167, 556: -Wno-pointer-sign
4786     # 1292: attribute "foo" ignored
4787     # 1419: external declaration in primary source file
4788     # 10006: ignoring unknown option -fno-signed-zeros
4789     # 10148: ignoring unknown option -Wno-parentheses
4790     # 10156: ignoring option '-W'; no argument required
4791     check_cflags -wd144,167,556,1292,1419,10006,10148,10156
4792     # 11030: Warning unknown option --as-needed
4793     # 10156: ignoring option '-export'; no argument required
4794     check_ldflags -wd10156,11030
4795     # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
4796     enable ebp_available
4797     if enabled x86_32; then
4798         icc_version=$($cc -dumpversion)
4799         test ${icc_version%%.*} -ge 11 &&
4800             check_cflags -falign-stack=maintain-16-byte ||
4801             disable aligned_stack
4802     fi
4803 elif enabled ccc; then
4804     # disable some annoying warnings
4805     add_cflags -msg_disable bitnotint
4806     add_cflags -msg_disable mixfuncvoid
4807     add_cflags -msg_disable nonstandcast