lavf: VAAPI scale filter
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix]
82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
85   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89   --enable-rpath           use rpath when linking programs [USE WITH CARE]
90
91 Licensing options:
92   --enable-gpl             allow use of GPL code, the resulting libs
93                            and binaries will be under GPL [no]
94   --enable-version3        upgrade (L)GPL to version 3 [no]
95   --enable-nonfree         allow use of nonfree code, the resulting libs
96                            and binaries will be unredistributable [no]
97
98 Configuration options:
99   --disable-static         do not build static libraries [no]
100   --enable-shared          build shared libraries [no]
101   --enable-small           optimize for size instead of speed
102   --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
103   --enable-gray            enable full grayscale support (slower color)
104   --disable-swscale-alpha  disable alpha channel support in swscale
105   --disable-all            disable building components, libraries and programs
106
107 Program options:
108   --disable-programs       do not build command line programs
109   --disable-avconv         disable avconv build
110   --disable-avplay         disable avplay build
111   --disable-avprobe        disable avprobe build
112   --disable-avserver       deprecated, does nothing
113
114 Component options:
115   --disable-doc            do not build documentation
116   --disable-avdevice       disable libavdevice build
117   --disable-avcodec        disable libavcodec build
118   --disable-avformat       disable libavformat build
119   --disable-avutil         disable libavutil build
120   --disable-swscale        disable libswscale build
121   --disable-avfilter       disable video filter support [no]
122   --disable-avresample     disable libavresample build [no]
123   --disable-pthreads       disable pthreads [auto]
124   --disable-w32threads     disable Win32 threads [auto]
125   --disable-network        disable network support [no]
126   --disable-dct            disable DCT code
127   --disable-error-resilience disable error resilience code
128   --disable-lsp            disable LSP code
129   --disable-lzo            disable LZO decoder code
130   --disable-mdct           disable MDCT code
131   --disable-rdft           disable RDFT code
132   --disable-fft            disable FFT code
133   --disable-faan           disable floating point AAN (I)DCT code
134
135 Hardware accelerators:
136   --enable-d3d11va         enable D3D11VA code
137   --enable-dxva2           enable DXVA2 code
138   --enable-vaapi           enable VAAPI code
139   --enable-vda             enable VDA code
140   --enable-vdpau           enable VDPAU code
141
142 Individual component options:
143   --disable-everything     disable all components listed below
144   --disable-encoder=NAME   disable encoder NAME
145   --enable-encoder=NAME    enable encoder NAME
146   --disable-encoders       disable all encoders
147   --disable-decoder=NAME   disable decoder NAME
148   --enable-decoder=NAME    enable decoder NAME
149   --disable-decoders       disable all decoders
150   --disable-hwaccel=NAME   disable hwaccel NAME
151   --enable-hwaccel=NAME    enable hwaccel NAME
152   --disable-hwaccels       disable all hwaccels
153   --disable-muxer=NAME     disable muxer NAME
154   --enable-muxer=NAME      enable muxer NAME
155   --disable-muxers         disable all muxers
156   --disable-demuxer=NAME   disable demuxer NAME
157   --enable-demuxer=NAME    enable demuxer NAME
158   --disable-demuxers       disable all demuxers
159   --enable-parser=NAME     enable parser NAME
160   --disable-parser=NAME    disable parser NAME
161   --disable-parsers        disable all parsers
162   --enable-bsf=NAME        enable bitstream filter NAME
163   --disable-bsf=NAME       disable bitstream filter NAME
164   --disable-bsfs           disable all bitstream filters
165   --enable-protocol=NAME   enable protocol NAME
166   --disable-protocol=NAME  disable protocol NAME
167   --disable-protocols      disable all protocols
168   --enable-indev=NAME      enable input device NAME
169   --disable-indev=NAME     disable input device NAME
170   --disable-indevs         disable input devices
171   --enable-outdev=NAME     enable output device NAME
172   --disable-outdev=NAME    disable output device NAME
173   --disable-outdevs        disable output devices
174   --disable-devices        disable all devices
175   --enable-filter=NAME     enable filter NAME
176   --disable-filter=NAME    disable filter NAME
177   --disable-filters        disable all filters
178
179 External library support:
180   --enable-avisynth        enable reading of AviSynth script files [no]
181   --enable-bzlib           enable bzlib [autodetect]
182   --enable-cuda            enable dynamically linked CUDA [no]
183   --enable-frei0r          enable frei0r video filtering
184   --enable-gnutls          enable gnutls [no]
185   --enable-libbs2b         enable bs2b DSP library [no]
186   --enable-libcdio         enable audio CD grabbing with libcdio
187   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
188                            and libraw1394 [no]
189   --enable-libdcadec       enable DCA decoding via libdcadec [no]
190   --enable-libfaac         enable AAC encoding via libfaac [no]
191   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
192   --enable-libfreetype     enable libfreetype [no]
193   --enable-libgsm          enable GSM de/encoding via libgsm [no]
194   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
195   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
196   --enable-libmfx          enable HW acceleration through libmfx
197   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
198   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
199   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
200   --enable-libopencv       enable video filtering via libopencv [no]
201   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
202   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
203   --enable-libopus         enable Opus de/encoding via libopus [no]
204   --enable-libpulse        enable Pulseaudio input via libpulse [no]
205   --enable-librtmp         enable RTMP[E] support via librtmp [no]
206   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
207   --enable-libsnappy       enable Snappy compression [no]
208   --enable-libspeex        enable Speex de/encoding via libspeex [no]
209   --enable-libtheora       enable Theora encoding via libtheora [no]
210   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
211   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
212   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
213   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
214   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
215   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
216   --enable-libwebp         enable WebP encoding via libwebp [no]
217   --enable-libx264         enable H.264 encoding via x264 [no]
218   --enable-libx265         enable HEVC encoding via x265 [no]
219   --enable-libxavs         enable AVS encoding via xavs [no]
220   --enable-libxcb          enable X11 grabbing using XCB [no]
221   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
222   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
223   --enable-libxvid         enable Xvid encoding via xvidcore,
224                            native MPEG-4/Xvid encoder exists [no]
225   --enable-mmal            enable decoding via MMAL [no]
226   --enable-nvenc           enable encoding via NVENC [no]
227   --enable-openssl         enable openssl [no]
228   --enable-x11grab         enable X11 grabbing (legacy) [no]
229   --enable-zlib            enable zlib [autodetect]
230
231 Toolchain options:
232   --arch=ARCH              select architecture [$arch]
233   --cpu=CPU                select the minimum required CPU (affects
234                            instruction selection, may crash on older CPUs)
235   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
236   --enable-cross-compile   assume a cross-compiler is used
237   --sysroot=PATH           root of cross-build tree
238   --sysinclude=PATH        location of cross-build system headers
239   --target-os=OS           compiler targets OS [$target_os]
240   --target-exec=CMD        command to run executables on target
241   --target-path=DIR        path to view of build directory on target
242   --target-samples=DIR     path to samples directory on target
243   --toolchain=NAME         set tool defaults according to NAME
244   --nm=NM                  use nm tool
245   --ar=AR                  use archive tool AR [$ar_default]
246   --as=AS                  use assembler AS [$as_default]
247   --cc=CC                  use C compiler CC [$cc_default]
248   --objcc=OCC              use ObjC compiler OCC [$cc_default]
249   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
250   --ld=LD                  use linker LD
251   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
252   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
253   --host-cc=HOSTCC         use host C compiler HOSTCC
254   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
255   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
256   --host-ld=HOSTLD         use host linker HOSTLD
257   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
258   --host-libs=HLIBS        use libs HLIBS when linking for host
259   --host-os=OS             compiler host OS [$target_os]
260   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
261   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
262   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
263   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
264   --extra-libs=ELIBS       add ELIBS [$ELIBS]
265   --extra-version=STRING   version string suffix []
266   --optflags=OPTFLAGS      override optimization-related compiler flags
267   --build-suffix=SUFFIX    library name suffix []
268   --enable-pic             build position-independent code
269   --enable-thumb           compile for Thumb instruction set
270   --enable-lto             use link-time optimization
271   --env="ENV=override"     override the environment variables
272
273 Advanced options (experts only):
274   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
275   --custom-allocator=NAME  use a supported custom allocator
276   --disable-symver         disable symbol versioning
277   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
278   --disable-safe-bitstream-reader
279                            disable buffer boundary checking in bitreaders
280                            (faster, but may crash)
281   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
282   --enable-sram            allow use of on-chip SRAM
283
284 Optimization options (experts only):
285   --disable-asm            disable all assembly optimizations
286   --disable-altivec        disable AltiVec optimizations
287   --disable-vsx            disable VSX optimizations
288   --disable-power8         disable POWER8 optimizations
289   --disable-amd3dnow       disable 3DNow! optimizations
290   --disable-amd3dnowext    disable 3DNow! extended optimizations
291   --disable-mmx            disable MMX optimizations
292   --disable-mmxext         disable MMXEXT optimizations
293   --disable-sse            disable SSE optimizations
294   --disable-sse2           disable SSE2 optimizations
295   --disable-sse3           disable SSE3 optimizations
296   --disable-ssse3          disable SSSE3 optimizations
297   --disable-sse4           disable SSE4 optimizations
298   --disable-sse42          disable SSE4.2 optimizations
299   --disable-avx            disable AVX optimizations
300   --disable-xop            disable XOP optimizations
301   --disable-fma3           disable FMA3 optimizations
302   --disable-fma4           disable FMA4 optimizations
303   --disable-avx2           disable AVX2 optimizations
304   --disable-armv5te        disable armv5te optimizations
305   --disable-armv6          disable armv6 optimizations
306   --disable-armv6t2        disable armv6t2 optimizations
307   --disable-vfp            disable VFP optimizations
308   --disable-neon           disable NEON optimizations
309   --disable-inline-asm     disable use of inline assembly
310   --disable-yasm           disable use of nasm/yasm assembly
311
312 Developer options (useful when working on Libav itself):
313   --disable-debug          disable debugging symbols
314   --enable-debug=LEVEL     set the debug level [$debuglevel]
315   --disable-optimizations  disable compiler optimizations
316   --enable-extra-warnings  enable more compiler warnings
317   --samples=PATH           location of test samples for FATE, if not set use
318                            \$LIBAV_SAMPLES at make invocation time.
319   --enable-neon-clobber-test check NEON registers for clobbering (should be
320                            used only for debugging purposes)
321   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
322                            should be used only for debugging purposes)
323   --enable-random          randomly enable/disable components
324   --disable-random
325   --enable-random=LIST     randomly enable/disable specific components or
326   --disable-random=LIST    component groups. LIST is a comma-separated list
327                            of NAME[:PROB] entries where NAME is a component
328                            (group) and PROB the probability associated with
329                            NAME (default 0.5).
330   --random-seed=VALUE      seed value for --enable/disable-random
331   --disable-valgrind-backtrace do not print a backtrace under Valgrind
332                            (only applies to --disable-optimizations builds)
333
334 NOTE: Object files are built at the place where configure is launched.
335 EOF
336   exit 0
337 }
338
339 quotes='""'
340
341 log(){
342     echo "$@" >> $logfile
343 }
344
345 log_file(){
346     log BEGIN $1
347     i=1
348     while read line; do
349         printf '%5s   %s\n' "${i}" "${line}"
350         i=$(($i+1))
351     done < $1 >> $logfile
352     log END $1
353 }
354
355 echolog(){
356     log "$@"
357     echo "$@"
358 }
359
360 warn(){
361     log "WARNING: $*"
362     WARNINGS="${WARNINGS}WARNING: $*\n"
363 }
364
365 die(){
366     echolog "$@"
367     cat <<EOF
368
369 If you think configure made a mistake, make sure you are using the latest
370 version from Git.  If the latest version fails, report the problem to the
371 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
372 EOF
373     if disabled logging; then
374         cat <<EOF
375 Rerun configure with logging enabled (do not use --disable-logging), and
376 include the log this produces with your report.
377 EOF
378     else
379         cat <<EOF
380 Include the log file "$logfile" produced by configure as this will help
381 solving the problem.
382 EOF
383     fi
384     exit 1
385 }
386
387 # Avoid locale weirdness, besides we really just want to translate ASCII.
388 toupper(){
389     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
390 }
391
392 tolower(){
393     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
394 }
395
396 c_escape(){
397     echo "$*" | sed 's/["\\]/\\\0/g'
398 }
399
400 sh_quote(){
401     v=$(echo "$1" | sed "s/'/'\\\\''/g")
402     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
403     echo "$v"
404 }
405
406 cleanws(){
407     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
408 }
409
410 filter(){
411     pat=$1
412     shift
413     for v; do
414         eval "case $v in $pat) echo $v ;; esac"
415     done
416 }
417
418 filter_out(){
419     pat=$1
420     shift
421     for v; do
422         eval "case $v in $pat) ;; *) echo $v ;; esac"
423     done
424 }
425
426 map(){
427     m=$1
428     shift
429     for v; do eval $m; done
430 }
431
432 add_suffix(){
433     suffix=$1
434     shift
435     for v; do echo ${v}${suffix}; done
436 }
437
438 set_all(){
439     value=$1
440     shift
441     for var in $*; do
442         eval $var=$value
443     done
444 }
445
446 set_weak(){
447     value=$1
448     shift
449     for var; do
450         eval : \${$var:=$value}
451     done
452 }
453
454 sanitize_var_name(){
455     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
456 }
457
458 set_safe(){
459     var=$1
460     shift
461     eval $(sanitize_var_name "$var")='$*'
462 }
463
464 get_safe(){
465     eval echo \$$(sanitize_var_name "$1")
466 }
467
468 pushvar(){
469     for pvar in $*; do
470         eval level=\${${pvar}_level:=0}
471         eval ${pvar}_${level}="\$$pvar"
472         eval ${pvar}_level=$(($level+1))
473     done
474 }
475
476 popvar(){
477     for pvar in $*; do
478         eval level=\${${pvar}_level:-0}
479         test $level = 0 && continue
480         eval level=$(($level-1))
481         eval $pvar="\${${pvar}_${level}}"
482         eval ${pvar}_level=$level
483         eval unset ${pvar}_${level}
484     done
485 }
486
487 enable(){
488     set_all yes $*
489 }
490
491 disable(){
492     set_all no $*
493 }
494
495 enable_weak(){
496     set_weak yes $*
497 }
498
499 disable_weak(){
500     set_weak no $*
501 }
502
503 enable_safe(){
504     for var; do
505         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
506     done
507 }
508
509 disable_safe(){
510     for var; do
511         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
512     done
513 }
514
515 do_enable_deep(){
516     for var; do
517         enabled $var && continue
518         eval sel="\$${var}_select"
519         eval sgs="\$${var}_suggest"
520         pushvar var sgs
521         enable_deep $sel
522         popvar sgs
523         enable_deep_weak $sgs
524         popvar var
525     done
526 }
527
528 enable_deep(){
529     do_enable_deep $*
530     enable $*
531 }
532
533 enable_deep_weak(){
534     for var; do
535         disabled $var && continue
536         pushvar var
537         do_enable_deep $var
538         popvar var
539         enable_weak $var
540     done
541 }
542
543 enabled(){
544     test "${1#!}" = "$1" && op== || op=!=
545     eval test "x\$${1#!}" $op "xyes"
546 }
547
548 disabled(){
549     test "${1#!}" = "$1" && op== || op=!=
550     eval test "x\$${1#!}" $op "xno"
551 }
552
553 enabled_all(){
554     for opt; do
555         enabled $opt || return 1
556     done
557 }
558
559 disabled_all(){
560     for opt; do
561         disabled $opt || return 1
562     done
563 }
564
565 enabled_any(){
566     for opt; do
567         enabled $opt && return 0
568     done
569 }
570
571 disabled_any(){
572     for opt; do
573         disabled $opt && return 0
574     done
575     return 1
576 }
577
578 set_default(){
579     for opt; do
580         eval : \${$opt:=\$${opt}_default}
581     done
582 }
583
584 is_in(){
585     value=$1
586     shift
587     for var in $*; do
588         [ $var = $value ] && return 0
589     done
590     return 1
591 }
592
593 do_check_deps(){
594     for cfg; do
595         cfg="${cfg#!}"
596         enabled ${cfg}_checking && die "Circular dependency for $cfg."
597         disabled ${cfg}_checking && continue
598         enable ${cfg}_checking
599         append allopts $cfg
600
601         eval dep_all="\$${cfg}_deps"
602         eval dep_any="\$${cfg}_deps_any"
603         eval dep_sel="\$${cfg}_select"
604         eval dep_sgs="\$${cfg}_suggest"
605         eval dep_ifa="\$${cfg}_if"
606         eval dep_ifn="\$${cfg}_if_any"
607
608         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
609         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
610         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
611
612         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
613         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
614         enabled_all  $dep_all || disable $cfg
615         enabled_any  $dep_any || disable $cfg
616         disabled_any $dep_sel && disable $cfg
617
618         if enabled $cfg; then
619             enable_deep $dep_sel
620             enable_deep_weak $dep_sgs
621         fi
622
623         disable ${cfg}_checking
624     done
625 }
626
627 check_deps(){
628     unset allopts
629
630     do_check_deps "$@"
631
632     for cfg in $allopts; do
633         enabled $cfg || continue
634         eval dep_extralibs="\$${cfg}_extralibs"
635         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
636     done
637 }
638
639 print_config(){
640     pfx=$1
641     files=$2
642     shift 2
643     map 'eval echo "$v \${$v:-no}"' "$@" |
644     awk "BEGIN { split(\"$files\", files) }
645         {
646             c = \"$pfx\" toupper(\$1);
647             v = \$2;
648             sub(/yes/, 1, v);
649             sub(/no/,  0, v);
650             for (f in files) {
651                 file = files[f];
652                 if (file ~ /\\.h\$/) {
653                     printf(\"#define %s %d\\n\", c, v) >>file;
654                 } else if (file ~ /\\.asm\$/) {
655                     printf(\"%%define %s %d\\n\", c, v) >>file;
656                 } else if (file ~ /\\.mak\$/) {
657                     n = -v ? \"\" : \"!\";
658                     printf(\"%s%s=yes\\n\", n, c) >>file;
659                 }
660             }
661         }"
662 }
663
664 print_enabled(){
665     suf=$1
666     shift
667     for v; do
668         enabled $v && printf "%s\n" ${v%$suf};
669     done
670 }
671
672 append(){
673     var=$1
674     shift
675     eval "$var=\"\$$var $*\""
676 }
677
678 prepend(){
679     var=$1
680     shift
681     eval "$var=\"$* \$$var\""
682 }
683
684 unique(){
685     var=$1
686     uniq_list=""
687     for tok in $(eval echo \$$var); do
688         uniq_list="$(filter_out $tok $uniq_list) $tok"
689     done
690     eval "$var=\"${uniq_list}\""
691 }
692
693 add_cppflags(){
694     append CPPFLAGS "$@"
695 }
696
697 add_cflags(){
698     append CFLAGS $($cflags_filter "$@")
699 }
700
701 add_asflags(){
702     append ASFLAGS $($asflags_filter "$@")
703 }
704
705 add_objcflags(){
706     append OBJCFLAGS $($objcflags_filter "$@")
707 }
708
709 add_ldflags(){
710     append LDFLAGS $($ldflags_filter "$@")
711 }
712
713 add_ldexeflags(){
714     append LDEXEFLAGS $($ldflags_filter "$@")
715 }
716
717 add_stripflags(){
718     append STRIPFLAGS "$@"
719 }
720
721 add_extralibs(){
722     prepend extralibs $($ldflags_filter "$@")
723 }
724
725 add_host_cppflags(){
726     append host_cppflags "$@"
727 }
728
729 add_host_cflags(){
730     append host_cflags $($host_cflags_filter "$@")
731 }
732
733 add_host_ldflags(){
734     append host_ldflags $($host_ldflags_filter "$@")
735 }
736
737 add_compat(){
738     append compat_objs $1
739     shift
740     map 'add_cppflags -D$v' "$@"
741 }
742
743 check_cmd(){
744     log "$@"
745     "$@" >> $logfile 2>&1
746 }
747
748 cc_o(){
749     eval printf '%s\\n' $CC_O
750 }
751
752 cc_e(){
753     eval printf '%s\\n' $CC_E
754 }
755
756 check_cc(){
757     log check_cc "$@"
758     cat > $TMPC
759     log_file $TMPC
760     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
761 }
762
763 check_objcc(){
764     log check_objcc "$@"
765     cat > $TMPC
766     log_file $TMPC
767     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
768 }
769
770 check_cpp(){
771     log check_cpp "$@"
772     cat > $TMPC
773     log_file $TMPC
774     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
775 }
776
777 as_o(){
778     eval printf '%s\\n' $AS_O
779 }
780
781 check_as(){
782     log check_as "$@"
783     cat > $TMPS
784     log_file $TMPS
785     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
786 }
787
788 check_inline_asm(){
789     log check_inline_asm "$@"
790     name="$1"
791     code="$2"
792     shift 2
793     disable $name
794     check_cc "$@" <<EOF && enable $name
795 void foo(void){ __asm__ volatile($code); }
796 EOF
797 }
798
799 check_insn(){
800     log check_insn "$@"
801     check_inline_asm ${1}_inline "\"$2\""
802     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
803 }
804
805 check_yasm(){
806     log check_yasm "$@"
807     echo "$1" > $TMPS
808     log_file $TMPS
809     shift 1
810     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
811 }
812
813 ld_o(){
814     eval printf '%s\\n' $LD_O
815 }
816
817 check_ld(){
818     log check_ld "$@"
819     flags=$(filter_out '-l*' "$@")
820     libs=$(filter '-l*' "$@")
821     check_cc $($cflags_filter $flags) || return
822     flags=$($ldflags_filter $flags)
823     libs=$($ldflags_filter $libs)
824     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
825 }
826
827 print_include(){
828     hdr=$1
829     test "${hdr%.h}" = "${hdr}" &&
830         echo "#include $hdr"    ||
831         echo "#include <$hdr>"
832 }
833
834 check_code(){
835     log check_code "$@"
836     check=$1
837     headers=$2
838     code=$3
839     shift 3
840     {
841         for hdr in $headers; do
842             print_include $hdr
843         done
844         echo "int main(void) { $code; return 0; }"
845     } | check_$check "$@"
846 }
847
848 check_cppflags(){
849     log check_cppflags "$@"
850     check_cc "$@" <<EOF && append CPPFLAGS "$@"
851 int x;
852 EOF
853 }
854
855 test_cflags(){
856     log test_cflags "$@"
857     set -- $($cflags_filter "$@")
858     check_cc "$@" <<EOF
859 int x;
860 EOF
861 }
862
863 check_cflags(){
864     log check_cflags "$@"
865     test_cflags "$@" && add_cflags "$@"
866 }
867
868 test_objcflags(){
869     log test_cflags "$@"
870     set -- $($cflags_filter "$@")
871     check_objcc "$@" <<EOF
872 int x;
873 EOF
874 }
875
876 check_objcflags(){
877     log check_cflags "$@"
878     test_objcflags "$@" && add_objcflags "$@"
879 }
880
881 test_ldflags(){
882     log test_ldflags "$@"
883     check_ld "$@" <<EOF
884 int main(void){ return 0; }
885 EOF
886 }
887
888 check_ldflags(){
889     log check_ldflags "$@"
890     test_ldflags "$@" && add_ldflags "$@"
891 }
892
893 test_stripflags(){
894     log test_stripflags "$@"
895     # call check_cc to get a fresh TMPO
896     check_cc <<EOF
897 int main(void) { return 0; }
898 EOF
899     check_cmd $strip $STRIPFLAGS "$@" $TMPO
900 }
901
902 check_stripflags(){
903     log check_stripflags "$@"
904     test_stripflags "$@" && add_stripflags "$@"
905 }
906
907 check_header(){
908     log check_header "$@"
909     header=$1
910     shift
911     disable_safe $header
912     check_cpp "$@" <<EOF && enable_safe $header
913 #include <$header>
914 int x;
915 EOF
916 }
917
918 check_func(){
919     log check_func "$@"
920     func=$1
921     shift
922     disable $func
923     check_ld "$@" <<EOF && enable $func
924 extern int $func();
925 int main(void){ $func(); }
926 EOF
927 }
928
929 check_mathfunc(){
930     log check_mathfunc "$@"
931     func=$1
932     narg=$2
933     shift 2
934     test $narg = 2 && args="f, g" || args="f"
935     disable $func
936     check_ld "$@" <<EOF && enable $func
937 #include <math.h>
938 float foo(float f, float g) { return $func($args); }
939 int main(void){ return 0; }
940 EOF
941 }
942
943 check_func_headers(){
944     log check_func_headers "$@"
945     headers=$1
946     funcs=$2
947     shift 2
948     {
949         for hdr in $headers; do
950             print_include $hdr
951         done
952         for func in $funcs; do
953             echo "long check_$func(void) { return (long) $func; }"
954         done
955         echo "int main(void) { return 0; }"
956     } | check_ld "$@" && enable $funcs && enable_safe $headers
957 }
958
959 check_cpp_condition(){
960     log check_cpp_condition "$@"
961     header=$1
962     condition=$2
963     shift 2
964     check_cpp "$@" <<EOF
965 #include <$header>
966 #if !($condition)
967 #error "unsatisfied condition: $condition"
968 #endif
969 EOF
970 }
971
972 check_lib(){
973     log check_lib "$@"
974     header="$1"
975     func="$2"
976     shift 2
977     check_header $header && check_func $func "$@" && add_extralibs "$@"
978 }
979
980 check_lib2(){
981     log check_lib2 "$@"
982     headers="$1"
983     funcs="$2"
984     shift 2
985     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
986 }
987
988 check_pkg_config(){
989     log check_pkg_config "$@"
990     pkg="$1"
991     headers="$2"
992     funcs="$3"
993     shift 3
994     check_cmd $pkg_config --exists --print-errors $pkg || return
995     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
996     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
997     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
998         set_safe "${pkg}_cflags" $pkg_cflags   &&
999         set_safe "${pkg}_libs"   $pkg_libs
1000 }
1001
1002 check_exec(){
1003     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1004 }
1005
1006 check_exec_crash(){
1007     code=$(cat)
1008
1009     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1010     # are safe but may not be available everywhere.  Thus we use
1011     # raise(SIGTERM) instead.  The check is run in a subshell so we
1012     # can redirect the "Terminated" message from the shell.  SIGBUS
1013     # is not defined by standard C so it is used conditionally.
1014
1015     (check_exec "$@") >> $logfile 2>&1 <<EOF
1016 #include <signal.h>
1017 static void sighandler(int sig){
1018     raise(SIGTERM);
1019 }
1020 int foo(void){
1021     $code
1022 }
1023 int (*func_ptr)(void) = foo;
1024 int main(void){
1025     signal(SIGILL, sighandler);
1026     signal(SIGFPE, sighandler);
1027     signal(SIGSEGV, sighandler);
1028 #ifdef SIGBUS
1029     signal(SIGBUS, sighandler);
1030 #endif
1031     return func_ptr();
1032 }
1033 EOF
1034 }
1035
1036 check_type(){
1037     log check_type "$@"
1038     headers=$1
1039     type=$2
1040     shift 2
1041     disable_safe "$type"
1042     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1043 }
1044
1045 check_struct(){
1046     log check_struct "$@"
1047     headers=$1
1048     struct=$2
1049     member=$3
1050     shift 3
1051     disable_safe "${struct}_${member}"
1052     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1053         enable_safe "${struct}_${member}"
1054 }
1055
1056 check_builtin(){
1057     log check_builtin "$@"
1058     name=$1
1059     headers=$2
1060     builtin=$3
1061     shift 3
1062     disable "$name"
1063     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1064 }
1065
1066 check_compile_assert(){
1067     log check_compile_assert "$@"
1068     name=$1
1069     headers=$2
1070     condition=$3
1071     shift 3
1072     disable "$name"
1073     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1074 }
1075
1076 require(){
1077     name="$1"
1078     header="$2"
1079     func="$3"
1080     shift 3
1081     check_lib $header $func "$@" || die "ERROR: $name not found"
1082 }
1083
1084 require2(){
1085     name="$1"
1086     headers="$2"
1087     func="$3"
1088     shift 3
1089     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1090 }
1091
1092 require_pkg_config(){
1093     pkg="$1"
1094     check_pkg_config "$@" || die "ERROR: $pkg not found"
1095     add_cflags    $(get_safe "${pkg}_cflags")
1096     add_extralibs $(get_safe "${pkg}_libs")
1097 }
1098
1099 hostcc_e(){
1100     eval printf '%s\\n' $HOSTCC_E
1101 }
1102
1103 hostcc_o(){
1104     eval printf '%s\\n' $HOSTCC_O
1105 }
1106
1107 check_host_cc(){
1108     log check_host_cc "$@"
1109     cat > $TMPC
1110     log_file $TMPC
1111     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1112 }
1113
1114 check_host_cpp(){
1115     log check_host_cpp "$@"
1116     cat > $TMPC
1117     log_file $TMPC
1118     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1119 }
1120
1121 check_host_cppflags(){
1122     log check_host_cppflags "$@"
1123     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1124 int x;
1125 EOF
1126 }
1127
1128 check_host_cflags(){
1129     log check_host_cflags "$@"
1130     set -- $($host_cflags_filter "$@")
1131     check_host_cc "$@" <<EOF && append host_cflags "$@"
1132 int x;
1133 EOF
1134 }
1135
1136 check_host_cpp_condition(){
1137     log check_host_cpp_condition "$@"
1138     header=$1
1139     condition=$2
1140     shift 2
1141     check_host_cpp "$@" <<EOF
1142 #include <$header>
1143 #if !($condition)
1144 #error "unsatisfied condition: $condition"
1145 #endif
1146 EOF
1147 }
1148
1149 apply(){
1150     file=$1
1151     shift
1152     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1153 }
1154
1155 cp_if_changed(){
1156     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1157     mkdir -p "$(dirname $2)"
1158     $cp_f "$1" "$2"
1159 }
1160
1161 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1162 # system-dependent things.
1163
1164 AVCODEC_COMPONENTS="
1165     bsfs
1166     decoders
1167     encoders
1168     hwaccels
1169     parsers
1170 "
1171
1172 AVDEVICE_COMPONENTS="
1173     indevs
1174     outdevs
1175 "
1176 AVFILTER_COMPONENTS="
1177     filters
1178 "
1179 AVFORMAT_COMPONENTS="
1180     demuxers
1181     muxers
1182     protocols
1183 "
1184
1185 AVRESAMPLE_COMPONENTS=""
1186 AVUTIL_COMPONENTS=""
1187
1188 COMPONENT_LIST="
1189     $AVCODEC_COMPONENTS
1190     $AVDEVICE_COMPONENTS
1191     $AVFILTER_COMPONENTS
1192     $AVFORMAT_COMPONENTS
1193     $AVRESAMPLE_COMPONENTS
1194     $AVUTIL_COMPONENTS
1195 "
1196
1197 EXAMPLE_LIST="
1198     avcodec_example
1199     filter_audio_example
1200     metadata_example
1201     output_example
1202     qsvdec_example
1203     transcode_aac_example
1204 "
1205
1206 EXTERNAL_LIBRARY_LIST="
1207     avisynth
1208     bzlib
1209     cuda
1210     frei0r
1211     gnutls
1212     libbs2b
1213     libcdio
1214     libdc1394
1215     libdcadec
1216     libfaac
1217     libfdk_aac
1218     libfontconfig
1219     libfreetype
1220     libgsm
1221     libilbc
1222     libkvazaar
1223     libmfx
1224     libmp3lame
1225     libopencore_amrnb
1226     libopencore_amrwb
1227     libopencv
1228     libopenh264
1229     libopenjpeg
1230     libopus
1231     libpulse
1232     librtmp
1233     libschroedinger
1234     libsnappy
1235     libspeex
1236     libtheora
1237     libtwolame
1238     libvo_aacenc
1239     libvo_amrwbenc
1240     libvorbis
1241     libvpx
1242     libwavpack
1243     libwebp
1244     libx264
1245     libx265
1246     libxavs
1247     libxcb
1248     libxcb_shm
1249     libxcb_xfixes
1250     libxvid
1251     mmal
1252     nvenc
1253     openssl
1254     x11grab
1255     zlib
1256 "
1257
1258 FEATURE_LIST="
1259     gray
1260     hardcoded_tables
1261     runtime_cpudetect
1262     safe_bitstream_reader
1263     shared
1264     small
1265     sram
1266     static
1267     swscale_alpha
1268 "
1269
1270 HWACCEL_LIST="
1271     d3d11va
1272     dxva2
1273     vaapi
1274     vda
1275     vdpau
1276 "
1277
1278 LIBRARY_LIST="
1279     avcodec
1280     avdevice
1281     avfilter
1282     avformat
1283     avresample
1284     avutil
1285     swscale
1286 "
1287
1288 LICENSE_LIST="
1289     gpl
1290     nonfree
1291     version3
1292 "
1293
1294 PROGRAM_LIST="
1295     avconv
1296     avplay
1297     avprobe
1298 "
1299
1300 SUBSYSTEM_LIST="
1301     dct
1302     doc
1303     error_resilience
1304     faan
1305     fft
1306     lsp
1307     lzo
1308     mdct
1309     network
1310     rdft
1311 "
1312
1313 CONFIG_LIST="
1314     $COMPONENT_LIST
1315     $EXAMPLE_LIST
1316     $EXTERNAL_LIBRARY_LIST
1317     $FEATURE_LIST
1318     $HWACCEL_LIST
1319     $LICENSE_LIST
1320     $LIBRARY_LIST
1321     $PROGRAM_LIST
1322     $SUBSYSTEM_LIST
1323     memalign_hack
1324     neon_clobber_test
1325     pic
1326     pod2man
1327     texi2html
1328     thumb
1329     valgrind_backtrace
1330     xmm_clobber_test
1331 "
1332
1333 THREADS_LIST="
1334     pthreads
1335     w32threads
1336 "
1337
1338 ATOMICS_LIST="
1339     atomics_gcc
1340     atomics_suncc
1341     atomics_win32
1342 "
1343
1344 ARCH_LIST="
1345     aarch64
1346     alpha
1347     arm
1348     avr32
1349     avr32_ap
1350     avr32_uc
1351     bfin
1352     ia64
1353     m68k
1354     mips
1355     mips64
1356     parisc
1357     ppc
1358     ppc64
1359     s390
1360     sh4
1361     sparc
1362     sparc64
1363     tilegx
1364     tilepro
1365     tomi
1366     x86
1367     x86_32
1368     x86_64
1369 "
1370
1371 ARCH_EXT_LIST_ARM="
1372     armv5te
1373     armv6
1374     armv6t2
1375     armv8
1376     neon
1377     vfp
1378     vfpv3
1379 "
1380
1381 ARCH_EXT_LIST_X86_SIMD="
1382     amd3dnow
1383     amd3dnowext
1384     avx
1385     avx2
1386     fma3
1387     fma4
1388     mmx
1389     mmxext
1390     sse
1391     sse2
1392     sse3
1393     sse4
1394     sse42
1395     ssse3
1396     xop
1397 "
1398
1399 ARCH_EXT_LIST_PPC="
1400     altivec
1401     dcbzl
1402     ldbrx
1403     power8
1404     ppc4xx
1405     vsx
1406 "
1407
1408 ARCH_EXT_LIST_X86="
1409     $ARCH_EXT_LIST_X86_SIMD
1410     cpunop
1411     i686
1412 "
1413
1414 ARCH_EXT_LIST_MIPS="
1415     loongson
1416     mips32r1
1417     mips64r1
1418     mips32r2
1419     mips64r2
1420     mips32r6
1421     mips64r6
1422 "
1423
1424 ARCH_EXT_LIST="
1425     $ARCH_EXT_LIST_ARM
1426     $ARCH_EXT_LIST_MIPS
1427     $ARCH_EXT_LIST_PPC
1428     $ARCH_EXT_LIST_X86
1429     vis
1430 "
1431
1432 ARCH_FEATURES="
1433     aligned_stack
1434     fast_64bit
1435     fast_clz
1436     fast_cmov
1437     local_aligned_8
1438     local_aligned_16
1439     simd_align_16
1440 "
1441
1442 BUILTIN_LIST="
1443     atomic_cas_ptr
1444     machine_rw_barrier
1445     MemoryBarrier
1446     mm_empty
1447     rdtsc
1448     sync_val_compare_and_swap
1449 "
1450 HAVE_LIST_CMDLINE="
1451     inline_asm
1452     symver
1453     yasm
1454 "
1455
1456 HAVE_LIST_PUB="
1457     bigendian
1458     fast_unaligned
1459 "
1460
1461 HEADERS_LIST="
1462     AVFoundation_AVFoundation_h
1463     alsa_asoundlib_h
1464     altivec_h
1465     arpa_inet_h
1466     cdio_paranoia_h
1467     cdio_paranoia_paranoia_h
1468     dev_bktr_ioctl_bt848_h
1469     dev_bktr_ioctl_meteor_h
1470     dev_ic_bt8xx_h
1471     dev_video_bktr_ioctl_bt848_h
1472     dev_video_meteor_ioctl_meteor_h
1473     direct_h
1474     dlfcn_h
1475     d3d11_h
1476     dxva_h
1477     gsm_h
1478     io_h
1479     mach_mach_time_h
1480     machine_ioctl_bt848_h
1481     machine_ioctl_meteor_h
1482     malloc_h
1483     poll_h
1484     sndio_h
1485     soundcard_h
1486     sys_mman_h
1487     sys_param_h
1488     sys_resource_h
1489     sys_select_h
1490     sys_soundcard_h
1491     sys_time_h
1492     sys_un_h
1493     sys_videoio_h
1494     unistd_h
1495     valgrind_valgrind_h
1496     windows_h
1497     winsock2_h
1498 "
1499
1500 INTRINSICS_LIST="
1501     intrinsics_neon
1502 "
1503
1504 MATH_FUNCS="
1505     atanf
1506     atan2f
1507     cbrtf
1508     cosf
1509     exp2
1510     exp2f
1511     expf
1512     isinf
1513     isnan
1514     ldexpf
1515     llrint
1516     llrintf
1517     log2
1518     log2f
1519     log10f
1520     lrint
1521     lrintf
1522     powf
1523     rint
1524     round
1525     roundf
1526     sinf
1527     trunc
1528     truncf
1529 "
1530
1531 SYSTEM_FUNCS="
1532     aligned_malloc
1533     clock_gettime
1534     closesocket
1535     CommandLineToArgvW
1536     CoTaskMemFree
1537     CryptGenRandom
1538     dlopen
1539     fcntl
1540     flt_lim
1541     fork
1542     getaddrinfo
1543     gethrtime
1544     getopt
1545     GetProcessAffinityMask
1546     GetProcessMemoryInfo
1547     GetProcessTimes
1548     getrusage
1549     GetSystemTimeAsFileTime
1550     gettimeofday
1551     gmtime_r
1552     inet_aton
1553     isatty
1554     jack_port_get_latency_range
1555     LoadLibrary
1556     localtime_r
1557     mach_absolute_time
1558     MapViewOfFile
1559     memalign
1560     mkstemp
1561     mmap
1562     mprotect
1563     nanosleep
1564     posix_memalign
1565     sched_getaffinity
1566     SetConsoleTextAttribute
1567     setmode
1568     setrlimit
1569     Sleep
1570     strerror_r
1571     sysconf
1572     sysctl
1573     usleep
1574     VirtualAlloc
1575 "
1576
1577 TOOLCHAIN_FEATURES="
1578     as_dn_directive
1579     as_func
1580     as_object_arch
1581     asm_mod_q
1582     attribute_may_alias
1583     attribute_packed
1584     ebp_available
1585     ebx_available
1586     gnu_as
1587     ibm_asm
1588     inline_asm_labels
1589     pragma_deprecated
1590     symver_asm_label
1591     symver_gnu_asm
1592     vfp_args
1593     xform_asm
1594     xmm_clobbers
1595 "
1596
1597 TYPES_LIST="
1598     CONDITION_VARIABLE_Ptr
1599     socklen_t
1600     struct_addrinfo
1601     struct_group_source_req
1602     struct_ip_mreq_source
1603     struct_ipv6_mreq
1604     struct_pollfd
1605     struct_rusage_ru_maxrss
1606     struct_sockaddr_in6
1607     struct_sockaddr_sa_len
1608     struct_sockaddr_storage
1609     struct_v4l2_frmivalenum_discrete
1610 "
1611
1612 HAVE_LIST="
1613     $ARCH_EXT_LIST
1614     $(add_suffix _external $ARCH_EXT_LIST)
1615     $(add_suffix _inline   $ARCH_EXT_LIST)
1616     $ARCH_FEATURES
1617     $ATOMICS_LIST
1618     $BUILTIN_LIST
1619     $HAVE_LIST_CMDLINE
1620     $HAVE_LIST_PUB
1621     $HEADERS_LIST
1622     $INTRINSICS_LIST
1623     $MATH_FUNCS
1624     $SYSTEM_FUNCS
1625     $THREADS_LIST
1626     $TOOLCHAIN_FEATURES
1627     $TYPES_LIST
1628     atomics_native
1629     dos_paths
1630     dxva2_lib
1631     libc_msvcrt
1632     libdc1394_1
1633     libdc1394_2
1634     sdl
1635     section_data_rel_ro
1636     threads
1637     vaapi_x11
1638     vdpau_x11
1639     xlib
1640 "
1641
1642 # options emitted with CONFIG_ prefix but not available on the command line
1643 CONFIG_EXTRA="
1644     aandcttables
1645     ac3dsp
1646     audio_frame_queue
1647     audiodsp
1648     blockdsp
1649     bswapdsp
1650     cabac
1651     dirac_parse
1652     dvprofile
1653     faandct
1654     faanidct
1655     fdctdsp
1656     flacdsp
1657     fmtconvert
1658     g722dsp
1659     gcrypt
1660     gmp
1661     golomb
1662     gplv3
1663     h263dsp
1664     h264chroma
1665     h264dsp
1666     h264pred
1667     h264qpel
1668     hpeldsp
1669     huffman
1670     huffyuvdsp
1671     huffyuvencdsp
1672     idctdsp
1673     iirfilter
1674     imdct15
1675     intrax8
1676     iso_media
1677     ividsp
1678     jpegtables
1679     libx262
1680     lgplv3
1681     lpc
1682     lzf
1683     me_cmp
1684     mpeg_er
1685     mpegaudio
1686     mpegaudiodsp
1687     mpegvideo
1688     mpegvideoenc
1689     mss34dsp
1690     pixblockdsp
1691     qpeldsp
1692     qsv
1693     qsvdec
1694     qsvenc
1695     rangecoder
1696     riffdec
1697     riffenc
1698     rtpdec
1699     rtpenc_chain
1700     rv34dsp
1701     sinewin
1702     snappy
1703     srtp
1704     startcode
1705     texturedsp
1706     texturedspenc
1707     tpeldsp
1708     vc1dsp
1709     videodsp
1710     vp3dsp
1711     vp56dsp
1712     vp8dsp
1713     wma_freqs
1714     wmv2dsp
1715 "
1716
1717 CMDLINE_SELECT="
1718     $ARCH_EXT_LIST
1719     $CONFIG_LIST
1720     $HAVE_LIST_CMDLINE
1721     $THREADS_LIST
1722     asm
1723     cross_compile
1724     debug
1725     extra_warnings
1726     logging
1727     lto
1728     optimizations
1729     rpath
1730 "
1731
1732 PATHS_LIST="
1733     bindir
1734     datadir
1735     docdir
1736     incdir
1737     libdir
1738     mandir
1739     prefix
1740     shlibdir
1741 "
1742
1743 CMDLINE_SET="
1744     $PATHS_LIST
1745     ar
1746     arch
1747     as
1748     build_suffix
1749     cc
1750     objcc
1751     cpu
1752     cross_prefix
1753     custom_allocator
1754     dep_cc
1755     env
1756     extra_version
1757     host_cc
1758     host_cflags
1759     host_ld
1760     host_ldflags
1761     host_libs
1762     host_os
1763     ld
1764     logfile
1765     malloc_prefix
1766     nm
1767     optflags
1768     pkg_config
1769     pkg_config_flags
1770     random_seed
1771     samples
1772     sysinclude
1773     sysroot
1774     target_exec
1775     target_os
1776     target_path
1777     target_samples
1778     toolchain
1779 "
1780
1781 CMDLINE_APPEND="
1782     extra_cflags
1783     extra_objcflags
1784     host_cppflags
1785 "
1786
1787 # code dependency declarations
1788
1789 # architecture extensions
1790
1791 armv5te_deps="arm"
1792 armv6_deps="arm"
1793 armv6t2_deps="arm"
1794 armv8_deps="aarch64"
1795 neon_deps_any="aarch64 arm"
1796 intrinsics_neon_deps="neon"
1797 vfp_deps_any="aarch64 arm"
1798 vfpv3_deps="vfp"
1799
1800 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1801
1802 altivec_deps="ppc"
1803 ppc4xx_deps="ppc"
1804 vsx_deps="altivec"
1805 power8_deps="vsx"
1806
1807 cpunop_deps="i686"
1808 x86_64_select="i686"
1809 x86_64_suggest="fast_cmov"
1810
1811 amd3dnow_deps="mmx"
1812 amd3dnowext_deps="amd3dnow"
1813 i686_deps="x86"
1814 mmx_deps="x86"
1815 mmxext_deps="mmx"
1816 sse_deps="mmxext"
1817 sse2_deps="sse"
1818 sse3_deps="sse2"
1819 ssse3_deps="sse3"
1820 sse4_deps="ssse3"
1821 sse42_deps="sse4"
1822 avx_deps="sse42"
1823 xop_deps="avx"
1824 fma3_deps="avx"
1825 fma4_deps="avx"
1826 avx2_deps="avx"
1827
1828 mmx_external_deps="yasm"
1829 mmx_inline_deps="inline_asm"
1830 mmx_suggest="mmx_external mmx_inline"
1831
1832 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1833     eval dep=\$${ext}_deps
1834     eval ${ext}_external_deps='"${dep}_external"'
1835     eval ${ext}_inline_deps='"${dep}_inline"'
1836     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1837 done
1838
1839 aligned_stack_if_any="aarch64 ppc x86"
1840 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1841 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1842 fast_unaligned_if_any="aarch64 ppc x86"
1843 simd_align_16_if_any="altivec neon sse"
1844
1845 # system capabilities
1846 symver_if_any="symver_asm_label symver_gnu_asm"
1847 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1848
1849 # threading support
1850 atomics_gcc_if="sync_val_compare_and_swap"
1851 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1852 atomics_win32_if="MemoryBarrier"
1853 atomics_native_if_any="$ATOMICS_LIST"
1854 w32threads_deps="atomics_native"
1855 threads_if_any="$THREADS_LIST"
1856
1857 # subsystems
1858 dct_select="rdft"
1859 dirac_parse_select="golomb"
1860 error_resilience_select="me_cmp"
1861 faandct_deps="faan fdctdsp"
1862 faanidct_deps="faan idctdsp"
1863 h264dsp_select="startcode"
1864 mdct_select="fft"
1865 rdft_select="fft"
1866 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1867 mpeg_er_select="error_resilience"
1868 mpegaudio_select="mpegaudiodsp"
1869 mpegaudiodsp_select="dct"
1870 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1871 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1872 nvenc_deps_any="dlopen LoadLibrary"
1873 nvenc_extralibs='$ldl'
1874 qsvdec_select="qsv"
1875 qsvenc_select="qsv"
1876 vc1dsp_select="h264chroma qpeldsp startcode"
1877
1878 # decoders / encoders
1879 aac_decoder_select="imdct15 mdct sinewin"
1880 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1881 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1882 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1883 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1884 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1885 adpcm_g722_decoder_select="g722dsp"
1886 adpcm_g722_encoder_select="g722dsp"
1887 aic_decoder_select="golomb idctdsp"
1888 alac_encoder_select="lpc"
1889 als_decoder_select="bswapdsp"
1890 amrnb_decoder_select="lsp"
1891 amrwb_decoder_select="lsp"
1892 amv_decoder_select="sp5x_decoder"
1893 ape_decoder_select="bswapdsp"
1894 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1895 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1896 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1897 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1898 atrac1_decoder_select="mdct sinewin"
1899 atrac3_decoder_select="mdct"
1900 atrac3p_decoder_select="mdct sinewin"
1901 bink_decoder_select="blockdsp hpeldsp"
1902 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1903 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1904 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1905 cllc_decoder_select="bswapdsp"
1906 comfortnoise_encoder_select="lpc"
1907 cook_decoder_select="audiodsp mdct sinewin"
1908 cscd_decoder_select="lzo"
1909 cscd_decoder_suggest="zlib"
1910 dca_decoder_select="fmtconvert mdct"
1911 dds_decoder_select="texturedsp"
1912 dnxhd_decoder_select="blockdsp idctdsp"
1913 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1914 dvvideo_decoder_select="dvprofile idctdsp"
1915 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1916 dxa_decoder_deps="zlib"
1917 dxv_decoder_select="lzf texturedsp"
1918 eac3_decoder_select="ac3_decoder"
1919 eac3_encoder_select="ac3_encoder"
1920 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1921 eatgq_decoder_select="aandcttables idctdsp"
1922 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1923 exr_decoder_deps="zlib"
1924 ffv1_decoder_select="golomb rangecoder"
1925 ffv1_encoder_select="rangecoder"
1926 ffvhuff_decoder_select="huffyuv_decoder"
1927 ffvhuff_encoder_select="huffyuv_encoder"
1928 fic_decoder_select="golomb"
1929 flac_decoder_select="flacdsp golomb"
1930 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1931 flashsv_decoder_deps="zlib"
1932 flashsv_encoder_deps="zlib"
1933 flashsv2_decoder_deps="zlib"
1934 flv_decoder_select="h263_decoder"
1935 flv_encoder_select="h263_encoder"
1936 fourxm_decoder_select="blockdsp bswapdsp"
1937 fraps_decoder_select="bswapdsp huffman"
1938 g2m_decoder_deps="zlib"
1939 g2m_decoder_select="blockdsp idctdsp jpegtables"
1940 h261_decoder_select="mpeg_er mpegvideo"
1941 h261_encoder_select="aandcttables mpegvideoenc"
1942 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1943 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1944 h263i_decoder_select="h263_decoder"
1945 h263p_encoder_select="h263_encoder"
1946 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
1947 h264_decoder_suggest="error_resilience"
1948 h264_nvenc_encoder_deps="nvenc"
1949 h264_qsv_decoder_deps="libmfx"
1950 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1951 h264_qsv_encoder_deps="libmfx"
1952 h264_qsv_encoder_select="qsvenc"
1953 hap_decoder_select="snappy texturedsp"
1954 hap_encoder_deps="libsnappy"
1955 hap_encoder_select="texturedspenc"
1956 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1957 hevc_nvenc_encoder_deps="nvenc"
1958 hevc_qsv_encoder_deps="libmfx"
1959 hevc_qsv_decoder_deps="libmfx"
1960 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1961 hevc_qsv_encoder_select="qsvenc"
1962 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1963 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1964 iac_decoder_select="imc_decoder"
1965 imc_decoder_select="bswapdsp fft mdct sinewin"
1966 indeo3_decoder_select="hpeldsp"
1967 indeo4_decoder_select="ividsp"
1968 indeo5_decoder_select="ividsp"
1969 interplay_video_decoder_select="hpeldsp"
1970 jpegls_decoder_select="golomb mjpeg_decoder"
1971 jpegls_encoder_select="golomb"
1972 jv_decoder_select="blockdsp"
1973 lagarith_decoder_select="huffyuvdsp"
1974 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1975 loco_decoder_select="golomb"
1976 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1977 metasound_decoder_select="lsp mdct sinewin"
1978 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1979 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1980 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1981 mjpegb_decoder_select="mjpeg_decoder"
1982 mlp_decoder_select="mlp_parser"
1983 motionpixels_decoder_select="bswapdsp"
1984 mp1_decoder_select="mpegaudio"
1985 mp1float_decoder_select="mpegaudio"
1986 mp2_decoder_select="mpegaudio"
1987 mp2float_decoder_select="mpegaudio"
1988 mp3_decoder_select="mpegaudio"
1989 mp3adu_decoder_select="mpegaudio"
1990 mp3adufloat_decoder_select="mpegaudio"
1991 mp3float_decoder_select="mpegaudio"
1992 mp3on4_decoder_select="mpegaudio"
1993 mp3on4float_decoder_select="mpegaudio"
1994 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1995 mpc8_decoder_select="mpegaudiodsp"
1996 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1997 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1998 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
1999 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2000 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2001 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2002 mpeg2_qsv_decoder_deps="libmfx"
2003 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2004 mpeg2_qsv_encoder_deps="libmfx"
2005 mpeg2_qsv_encoder_select="qsvenc"
2006 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2007 mpeg4_encoder_select="h263_encoder"
2008 msa1_decoder_select="mss34dsp"
2009 msmpeg4v1_decoder_select="h263_decoder"
2010 msmpeg4v2_decoder_select="h263_decoder"
2011 msmpeg4v2_encoder_select="h263_encoder"
2012 msmpeg4v3_decoder_select="h263_decoder"
2013 msmpeg4v3_encoder_select="h263_encoder"
2014 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2015 mts2_decoder_select="mss34dsp"
2016 mxpeg_decoder_select="mjpeg_decoder"
2017 nellymoser_decoder_select="mdct sinewin"
2018 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2019 nuv_decoder_select="idctdsp lzo"
2020 nvenc_h264_encoder_deps="nvenc"
2021 nvenc_hevc_encoder_deps="nvenc"
2022 on2avc_decoder_select="mdct"
2023 opus_decoder_deps="avresample"
2024 opus_decoder_select="imdct15"
2025 png_decoder_deps="zlib"
2026 png_encoder_deps="zlib"
2027 png_encoder_select="huffyuvencdsp"
2028 prores_decoder_select="idctdsp"
2029 prores_encoder_select="fdctdsp"
2030 qcelp_decoder_select="lsp"
2031 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2032 ra_144_encoder_select="audio_frame_queue lpc"
2033 ralf_decoder_select="golomb"
2034 rscc_decoder_deps="zlib"
2035 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2036 rv10_encoder_select="h263_encoder"
2037 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2038 rv20_encoder_select="h263_encoder"
2039 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2040 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2041 screenpresso_decoder_deps="zlib"
2042 shorten_decoder_select="golomb"
2043 sipr_decoder_select="lsp"
2044 sp5x_decoder_select="mjpeg_decoder"
2045 svq1_decoder_select="hpeldsp"
2046 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2047 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2048 svq3_decoder_suggest="zlib"
2049 tak_decoder_select="audiodsp"
2050 tdsc_decoder_deps="zlib"
2051 tdsc_decoder_select="mjpeg_decoder"
2052 theora_decoder_select="vp3_decoder"
2053 thp_decoder_select="mjpeg_decoder"
2054 tiff_decoder_suggest="zlib"
2055 tiff_encoder_suggest="zlib"
2056 truehd_decoder_select="mlp_decoder"
2057 truemotion2_decoder_select="bswapdsp"
2058 truespeech_decoder_select="bswapdsp"
2059 tscc_decoder_deps="zlib"
2060 txd_decoder_select="texturedsp"
2061 twinvq_decoder_select="mdct lsp sinewin"
2062 utvideo_decoder_select="bswapdsp"
2063 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2064 vble_decoder_select="huffyuvdsp"
2065 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2066 vc1image_decoder_select="vc1_decoder"
2067 vorbis_decoder_select="mdct"
2068 vorbis_encoder_select="mdct"
2069 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2070 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2071 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2072 vp6a_decoder_select="vp6_decoder"
2073 vp6f_decoder_select="vp6_decoder"
2074 vp7_decoder_select="h264pred videodsp vp8dsp"
2075 vp8_decoder_select="h264pred videodsp vp8dsp"
2076 vp9_decoder_select="videodsp"
2077 webp_decoder_select="vp8_decoder"
2078 wmapro_decoder_select="mdct sinewin wma_freqs"
2079 wmav1_decoder_select="mdct sinewin wma_freqs"
2080 wmav1_encoder_select="mdct sinewin wma_freqs"
2081 wmav2_decoder_select="mdct sinewin wma_freqs"
2082 wmav2_encoder_select="mdct sinewin wma_freqs"
2083 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2084 wmv1_decoder_select="h263_decoder"
2085 wmv1_encoder_select="h263_encoder"
2086 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2087 wmv2_encoder_select="h263_encoder wmv2dsp"
2088 wmv3_decoder_select="vc1_decoder"
2089 wmv3image_decoder_select="wmv3_decoder"
2090 zerocodec_decoder_deps="zlib"
2091 zlib_decoder_deps="zlib"
2092 zlib_encoder_deps="zlib"
2093 zmbv_decoder_deps="zlib"
2094 zmbv_encoder_deps="zlib"
2095
2096 # hardware accelerators
2097 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2098 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2099 vaapi_deps="va_va_h"
2100 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2101 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2102 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2103
2104 h263_vaapi_hwaccel_deps="vaapi"
2105 h263_vaapi_hwaccel_select="h263_decoder"
2106 h264_d3d11va_hwaccel_deps="d3d11va"
2107 h264_d3d11va_hwaccel_select="h264_decoder"
2108 h264_dxva2_hwaccel_deps="dxva2"
2109 h264_dxva2_hwaccel_select="h264_decoder"
2110 h264_mmal_decoder_deps="mmal"
2111 h264_mmal_hwaccel_deps="mmal"
2112 h264_mmal_decoder_select="h264_decoder"
2113 h264_mmal_encoder_deps="mmal"
2114 h264_qsv_hwaccel_deps="libmfx"
2115 h264_vaapi_hwaccel_deps="vaapi"
2116 h264_vaapi_hwaccel_select="h264_decoder"
2117 h264_vda_hwaccel_deps="vda"
2118 h264_vda_hwaccel_select="h264_decoder"
2119 h264_vda_old_hwaccel_deps="vda"
2120 h264_vda_old_hwaccel_select="h264_decoder"
2121 h264_vdpau_hwaccel_deps="vdpau"
2122 h264_vdpau_hwaccel_select="h264_decoder"
2123 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2124 hevc_d3d11va_hwaccel_select="hevc_decoder"
2125 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2126 hevc_dxva2_hwaccel_select="hevc_decoder"
2127 hevc_qsv_hwaccel_deps="libmfx"
2128 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2129 hevc_vdpau_hwaccel_select="hevc_decoder"
2130 mpeg1_vdpau_hwaccel_deps="vdpau"
2131 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2132 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2133 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2134 mpeg2_dxva2_hwaccel_deps="dxva2"
2135 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2136 mpeg2_qsv_hwaccel_deps="libmfx"
2137 mpeg2_vaapi_hwaccel_deps="vaapi"
2138 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2139 mpeg2_vdpau_hwaccel_deps="vdpau"
2140 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2141 mpeg4_vaapi_hwaccel_deps="vaapi"
2142 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2143 mpeg4_vdpau_hwaccel_deps="vdpau"
2144 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2145 vc1_d3d11va_hwaccel_deps="d3d11va"
2146 vc1_d3d11va_hwaccel_select="vc1_decoder"
2147 vc1_dxva2_hwaccel_deps="dxva2"
2148 vc1_dxva2_hwaccel_select="vc1_decoder"
2149 vc1_vaapi_hwaccel_deps="vaapi"
2150 vc1_vaapi_hwaccel_select="vc1_decoder"
2151 vc1_vdpau_hwaccel_deps="vdpau"
2152 vc1_vdpau_hwaccel_select="vc1_decoder"
2153 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2154 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2155 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2156 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2157
2158 # parsers
2159 h264_parser_select="h264_decoder"
2160 hevc_parser_select="golomb"
2161 mpegvideo_parser_select="mpegvideo"
2162 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2163 vc1_parser_select="vc1dsp"
2164
2165 # bitstream_filters
2166 mjpeg2jpeg_bsf_select="jpegtables"
2167
2168 # external libraries
2169 libdcadec_decoder_deps="libdcadec"
2170 libfaac_encoder_deps="libfaac"
2171 libfaac_encoder_select="audio_frame_queue"
2172 libfdk_aac_decoder_deps="libfdk_aac"
2173 libfdk_aac_encoder_deps="libfdk_aac"
2174 libfdk_aac_encoder_select="audio_frame_queue"
2175 libgsm_decoder_deps="libgsm"
2176 libgsm_encoder_deps="libgsm"
2177 libgsm_ms_decoder_deps="libgsm"
2178 libgsm_ms_encoder_deps="libgsm"
2179 libilbc_decoder_deps="libilbc"
2180 libilbc_encoder_deps="libilbc"
2181 libkvazaar_encoder_deps="libkvazaar"
2182 libmp3lame_encoder_deps="libmp3lame"
2183 libmp3lame_encoder_select="audio_frame_queue"
2184 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2185 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2186 libopencore_amrnb_encoder_select="audio_frame_queue"
2187 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2188 libopenh264_encoder_deps="libopenh264"
2189 libopenjpeg_decoder_deps="libopenjpeg"
2190 libopenjpeg_encoder_deps="libopenjpeg"
2191 libopus_decoder_deps="libopus"
2192 libopus_encoder_deps="libopus"
2193 libopus_encoder_select="audio_frame_queue"
2194 libschroedinger_decoder_deps="libschroedinger"
2195 libschroedinger_encoder_deps="libschroedinger"
2196 libspeex_decoder_deps="libspeex"
2197 libspeex_encoder_deps="libspeex"
2198 libspeex_encoder_select="audio_frame_queue"
2199 libtheora_encoder_deps="libtheora"
2200 libtwolame_encoder_deps="libtwolame"
2201 libvo_aacenc_encoder_deps="libvo_aacenc"
2202 libvo_aacenc_encoder_select="audio_frame_queue"
2203 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2204 libvorbis_encoder_deps="libvorbis"
2205 libvorbis_encoder_select="audio_frame_queue"
2206 libvpx_vp8_decoder_deps="libvpx"
2207 libvpx_vp8_encoder_deps="libvpx"
2208 libvpx_vp9_decoder_deps="libvpx"
2209 libvpx_vp9_encoder_deps="libvpx"
2210 libwavpack_encoder_deps="libwavpack"
2211 libwebp_encoder_deps="libwebp"
2212 libx262_encoder_deps="libx262"
2213 libx264_encoder_deps="libx264"
2214 libx265_encoder_deps="libx265"
2215 libxavs_encoder_deps="libxavs"
2216 libxvid_encoder_deps="libxvid"
2217
2218 # demuxers / muxers
2219 ac3_demuxer_select="ac3_parser"
2220 asf_demuxer_select="riffdec"
2221 asf_muxer_select="riffenc"
2222 asf_stream_muxer_select="asf_muxer"
2223 avi_demuxer_select="iso_media riffdec"
2224 avi_muxer_select="riffenc"
2225 avisynth_demuxer_deps="avisynth"
2226 avisynth_demuxer_select="riffdec"
2227 caf_demuxer_select="iso_media riffdec"
2228 dash_muxer_select="mp4_muxer"
2229 dirac_demuxer_select="dirac_parser"
2230 dv_demuxer_select="dvprofile"
2231 dv_muxer_select="dvprofile"
2232 dxa_demuxer_select="riffdec"
2233 eac3_demuxer_select="ac3_parser"
2234 f4v_muxer_select="mov_muxer"
2235 flac_demuxer_select="flac_parser"
2236 hds_muxer_select="flv_muxer"
2237 hls_muxer_select="mpegts_muxer"
2238 ipod_muxer_select="mov_muxer"
2239 ismv_muxer_select="mov_muxer"
2240 matroska_audio_muxer_select="matroska_muxer"
2241 matroska_demuxer_select="iso_media riffdec"
2242 matroska_demuxer_suggest="bzlib lzo zlib"
2243 matroska_muxer_select="iso_media riffenc"
2244 mmf_muxer_select="riffenc"
2245 mov_demuxer_select="iso_media riffdec"
2246 mov_demuxer_suggest="zlib"
2247 mov_muxer_select="iso_media riffenc rtpenc_chain"
2248 mp3_demuxer_select="mpegaudio_parser"
2249 mp4_muxer_select="mov_muxer"
2250 mpegts_demuxer_select="iso_media"
2251 mpegts_muxer_select="adts_muxer latm_muxer"
2252 mpegtsraw_demuxer_select="mpegts_demuxer"
2253 mxf_d10_muxer_select="mxf_muxer"
2254 nut_muxer_select="riffenc"
2255 nuv_demuxer_select="riffdec"
2256 oga_muxer_select="ogg_muxer"
2257 ogg_demuxer_select="dirac_parse"
2258 opus_muxer_select="ogg_muxer"
2259 psp_muxer_select="mov_muxer"
2260 rtp_demuxer_select="sdp_demuxer"
2261 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2262 rtsp_demuxer_select="http_protocol rtpdec"
2263 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2264 sap_demuxer_select="sdp_demuxer"
2265 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2266 sdp_demuxer_select="rtpdec"
2267 smoothstreaming_muxer_select="ismv_muxer"
2268 spdif_muxer_select="aac_parser"
2269 spx_muxer_select="ogg_muxer"
2270 swf_demuxer_suggest="zlib"
2271 tak_demuxer_select="tak_parser"
2272 tg2_muxer_select="mov_muxer"
2273 tgp_muxer_select="mov_muxer"
2274 w64_demuxer_select="wav_demuxer"
2275 wav_demuxer_select="riffdec"
2276 wav_muxer_select="riffenc"
2277 webm_muxer_select="iso_media riffenc"
2278 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2279 wtv_demuxer_select="mpegts_demuxer riffdec"
2280 xmv_demuxer_select="riffdec"
2281 xwma_demuxer_select="riffdec"
2282
2283 # indevs / outdevs
2284 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2285 alsa_outdev_deps="alsa_asoundlib_h"
2286 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2287 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2288 dv1394_indev_deps="dv1394"
2289 dv1394_indev_select="dv_demuxer"
2290 fbdev_indev_deps="linux_fb_h"
2291 jack_indev_deps="jack_jack_h pthreads"
2292 libcdio_indev_deps="libcdio"
2293 libdc1394_indev_deps="libdc1394"
2294 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2295 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2296 pulse_indev_deps="libpulse"
2297 sndio_indev_deps="sndio_h"
2298 sndio_outdev_deps="sndio_h"
2299 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2300 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2301 vfwcap_indev_extralibs="-lavicap32"
2302 x11grab_indev_deps="x11grab"
2303 x11grab_xcb_indev_deps="libxcb"
2304
2305 # protocols
2306 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2307 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2308 ffrtmpcrypt_protocol_select="tcp_protocol"
2309 ffrtmphttp_protocol_deps="!librtmp_protocol"
2310 ffrtmphttp_protocol_select="http_protocol"
2311 gopher_protocol_select="network"
2312 http_protocol_select="tcp_protocol"
2313 httpproxy_protocol_select="tcp_protocol"
2314 https_protocol_select="tls_protocol"
2315 icecast_protocol_select="http_protocol"
2316 librtmp_protocol_deps="librtmp"
2317 librtmpe_protocol_deps="librtmp"
2318 librtmps_protocol_deps="librtmp"
2319 librtmpt_protocol_deps="librtmp"
2320 librtmpte_protocol_deps="librtmp"
2321 mmsh_protocol_select="http_protocol"
2322 mmst_protocol_select="network"
2323 rtmp_protocol_deps="!librtmp_protocol"
2324 rtmp_protocol_select="tcp_protocol"
2325 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2326 rtmps_protocol_deps="!librtmp_protocol"
2327 rtmps_protocol_select="tls_protocol"
2328 rtmpt_protocol_select="ffrtmphttp_protocol"
2329 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2330 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2331 rtp_protocol_select="udp_protocol"
2332 sctp_protocol_deps="struct_sctp_event_subscribe"
2333 sctp_protocol_select="network"
2334 srtp_protocol_select="rtp_protocol srtp"
2335 tcp_protocol_select="network"
2336 tls_gnutls_protocol_deps="gnutls"
2337 tls_gnutls_protocol_select="tcp_protocol"
2338 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2339 tls_openssl_protocol_select="tcp_protocol"
2340 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2341 udp_protocol_select="network"
2342 unix_protocol_deps="sys_un_h"
2343 unix_protocol_select="network"
2344
2345 # filters
2346 blackframe_filter_deps="gpl"
2347 boxblur_filter_deps="gpl"
2348 bs2b_filter_deps="libbs2b"
2349 cropdetect_filter_deps="gpl"
2350 delogo_filter_deps="gpl"
2351 drawtext_filter_deps="libfreetype"
2352 frei0r_filter_deps="frei0r dlopen"
2353 frei0r_filter_extralibs='$ldl'
2354 frei0r_src_filter_deps="frei0r dlopen"
2355 frei0r_src_filter_extralibs='$ldl'
2356 hqdn3d_filter_deps="gpl"
2357 hwupload_cuda_filter_deps="cuda"
2358 interlace_filter_deps="gpl"
2359 ocv_filter_deps="libopencv"
2360 resample_filter_deps="avresample"
2361 scale_filter_deps="swscale"
2362 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2363
2364 # examples
2365 avcodec_example_deps="avcodec avutil"
2366 filter_audio_example_deps="avfilter avutil"
2367 metadata_example_deps="avformat avutil"
2368 output_example_deps="avcodec avformat avutil swscale"
2369 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2370 transcode_aac_example_deps="avcodec avformat avresample"
2371
2372 # libraries, in linking order
2373 avcodec_deps="avutil"
2374 avdevice_deps="avformat avcodec avutil"
2375 avfilter_deps="avutil"
2376 avformat_deps="avcodec avutil"
2377 avresample_deps="avutil"
2378 swscale_deps="avutil"
2379
2380 # programs
2381 avconv_deps="avcodec avfilter avformat avresample swscale"
2382 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2383                fps_filter null_filter resample_filter scale_filter
2384                setpts_filter trim_filter"
2385 avplay_deps="avcodec avfilter avformat avresample sdl"
2386 avplay_libs='$sdl_libs'
2387 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2388 avprobe_deps="avcodec avformat"
2389
2390 # documentation
2391 pod2man_deps="doc"
2392 texi2html_deps="doc"
2393
2394 # default parameters
2395
2396 logfile="config.log"
2397
2398 # installation paths
2399 prefix_default="/usr/local"
2400 bindir_default='${prefix}/bin'
2401 datadir_default='${prefix}/share/avconv'
2402 docdir_default='${prefix}/share/doc/libav'
2403 incdir_default='${prefix}/include'
2404 libdir_default='${prefix}/lib'
2405 mandir_default='${prefix}/share/man'
2406 shlibdir_default="$libdir_default"
2407
2408 # toolchain
2409 ar_default="ar"
2410 cc_default="gcc"
2411 host_cc_default="gcc"
2412 cp_f="cp -f"
2413 ln_s="ln -s -f"
2414 nm_default="nm -g"
2415 objformat="elf"
2416 pkg_config_default=pkg-config
2417 ranlib="ranlib"
2418 strip="strip"
2419 yasmexe="yasm"
2420
2421 # machine
2422 arch_default=$(uname -m)
2423 cpu="generic"
2424 intrinsics="none"
2425
2426 # OS
2427 target_os_default=$(tolower $(uname -s))
2428 host_os=$target_os_default
2429
2430 # configurable options
2431 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2432
2433 enable asm
2434 enable debug
2435 enable doc
2436 enable faan faandct faanidct
2437 enable optimizations
2438 enable safe_bitstream_reader
2439 enable static
2440 enable swscale_alpha
2441 enable valgrind_backtrace
2442
2443 # By default, enable only those hwaccels that have no external dependencies.
2444 enable d3d11va dxva2 vda vdpau
2445
2446 # build settings
2447 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2448 LIBPREF="lib"
2449 LIBSUF=".a"
2450 FULLNAME='$(NAME)$(BUILDSUF)'
2451 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2452 SLIBPREF="lib"
2453 SLIBSUF=".so"
2454 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2455 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2456 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2457 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2458 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2459 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2460
2461 asflags_filter=echo
2462 cflags_filter=echo
2463 ldflags_filter=echo
2464
2465 AS_C='-c'
2466 AS_O='-o $@'
2467 CC_C='-c'
2468 CC_E='-E -o $@'
2469 CC_O='-o $@'
2470 OBJCC_C='-c'
2471 OBJCC_E='-E -o $@'
2472 OBJCC_O='-o $@'
2473 LD_O='-o $@'
2474 LD_LIB='-l%'
2475 LD_PATH='-L'
2476 HOSTCC_C='-c'
2477 HOSTCC_E='-E -o $@'
2478 HOSTCC_O='-o $@'
2479 HOSTLD_O='-o $@'
2480
2481 host_libs='-lm'
2482 host_cflags_filter=echo
2483 host_ldflags_filter=echo
2484
2485 target_path='$(CURDIR)'
2486
2487 # since the object filename is not given with the -MM flag, the compiler
2488 # is only able to print the basename, and we must add the path ourselves
2489 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2490 DEPFLAGS='-MM'
2491
2492 # find source path
2493 if test -f configure; then
2494     source_path=.
2495 else
2496     source_path=$(cd $(dirname "$0"); pwd)
2497     echo "$source_path" | grep -q '[[:blank:]]' &&
2498         die "Out of tree builds are impossible with whitespace in source path."
2499     test -e "$source_path/config.h" &&
2500         die "Out of tree builds are impossible with config.h in source dir."
2501 fi
2502
2503 for v in "$@"; do
2504     r=${v#*=}
2505     l=${v%"$r"}
2506     r=$(sh_quote "$r")
2507     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2508 done
2509
2510 find_things(){
2511     thing=$1
2512     pattern=$2
2513     file=$source_path/$3
2514     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2515 }
2516
2517 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2518 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2519 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2520 PARSER_LIST=$(find_things   parser   PARSER   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 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2526
2527 find_things_extern(){
2528     thing=$1
2529     pattern=$2
2530     file=$source_path/$3
2531     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2532 }
2533
2534 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2535 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2536
2537 ALL_COMPONENTS="
2538     $BSF_LIST
2539     $DECODER_LIST
2540     $DEMUXER_LIST
2541     $ENCODER_LIST
2542     $FILTER_LIST
2543     $HWACCEL_LIST
2544     $INDEV_LIST
2545     $MUXER_LIST
2546     $OUTDEV_LIST
2547     $PARSER_LIST
2548     $PROTOCOL_LIST
2549 "
2550
2551 for n in $COMPONENT_LIST; do
2552     v=$(toupper ${n%s})_LIST
2553     eval enable \$$v
2554     eval ${n}_if_any="\$$v"
2555 done
2556
2557 enable $ARCH_EXT_LIST
2558
2559 die_unknown(){
2560     echo "Unknown option \"$1\"."
2561     echo "See $0 --help for available options."
2562     exit 1
2563 }
2564
2565 print_3_columns() {
2566     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2567 }
2568
2569 show_list() {
2570     suffix=_$1
2571     shift
2572     echo $* | sed s/$suffix//g | print_3_columns
2573     exit 0
2574 }
2575
2576 rand_list(){
2577     IFS=', '
2578     set -- $*
2579     unset IFS
2580     for thing; do
2581         comp=${thing%:*}
2582         prob=${thing#$comp}
2583         prob=${prob#:}
2584         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2585         echo "prob ${prob:-0.5}"
2586         printf '%s\n' $comp
2587     done
2588 }
2589
2590 do_random(){
2591     action=$1
2592     shift
2593     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2594     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2595 }
2596
2597 for opt do
2598     optval="${opt#*=}"
2599     case "$opt" in
2600         --extra-ldflags=*)
2601             add_ldflags $optval
2602         ;;
2603         --extra-ldexeflags=*)
2604             add_ldexeflags $optval
2605         ;;
2606         --extra-libs=*)
2607             add_extralibs $optval
2608         ;;
2609         --disable-devices)
2610             disable $INDEV_LIST $OUTDEV_LIST
2611         ;;
2612         --enable-debug=*)
2613             debuglevel="$optval"
2614         ;;
2615         --disable-programs)
2616             disable $PROGRAM_LIST
2617         ;;
2618         --disable-everything)
2619             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2620         ;;
2621         --disable-all)
2622             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2623             disable $LIBRARY_LIST $PROGRAM_LIST doc
2624         ;;
2625         --enable-random|--disable-random)
2626             action=${opt%%-random}
2627             do_random ${action#--} $COMPONENT_LIST
2628         ;;
2629         --enable-random=*|--disable-random=*)
2630             action=${opt%%-random=*}
2631             do_random ${action#--} $optval
2632         ;;
2633         --enable-*=*|--disable-*=*)
2634             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2635             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2636             eval list=\$$(toupper $thing)_LIST
2637             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2638             $action $(filter "$name" $list)
2639         ;;
2640         --enable-avserver|--disable-avserver*)
2641             warn "avserver has been removed, the ${opt} option is only"\
2642                  "provided for compatibility and will be removed in the future"
2643         ;;
2644         --enable-?*|--disable-?*)
2645             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2646             if is_in $option $COMPONENT_LIST; then
2647                 test $action = disable && action=unset
2648                 eval $action \$$(toupper ${option%s})_LIST
2649             elif is_in $option $CMDLINE_SELECT; then
2650                 $action $option
2651             else
2652                 die_unknown $opt
2653             fi
2654         ;;
2655         --list-*)
2656             NAME="${opt#--list-}"
2657             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2658             NAME=${NAME%s}
2659             eval show_list $NAME \$$(toupper $NAME)_LIST
2660         ;;
2661         --help|-h) show_help
2662         ;;
2663         *)
2664             optname="${opt%%=*}"
2665             optname="${optname#--}"
2666             optname=$(echo "$optname" | sed 's/-/_/g')
2667             if is_in $optname $CMDLINE_SET; then
2668                 eval $optname='$optval'
2669             elif is_in $optname $CMDLINE_APPEND; then
2670                 append $optname "$optval"
2671             else
2672                 die_unknown $opt
2673             fi
2674         ;;
2675     esac
2676 done
2677
2678 for e in $env; do
2679     eval "export $e"
2680 done
2681
2682 disabled logging && logfile=/dev/null
2683
2684 # Disable all the library-specific components if the library itself
2685 # is disabled, see AVCODEC_LIST and following _LIST variables.
2686
2687 disable_components(){
2688     disabled ${1} && disable $(
2689         eval components="\$$(toupper ${1})_COMPONENTS"
2690         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2691     )
2692 }
2693
2694 map 'disable_components $v' $LIBRARY_LIST
2695
2696 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2697 set >> $logfile
2698
2699 case "$toolchain" in
2700     *-asan)
2701         cc_default="${toolchain%-asan}"
2702         add_cflags  -fsanitize=address
2703         add_ldflags -fsanitize=address
2704     ;;
2705     *-msan)
2706         cc_default="${toolchain%-msan}"
2707         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2708         add_ldflags -fsanitize=memory
2709     ;;
2710     *-tsan)
2711         cc_default="${toolchain%-tsan}"
2712         add_cflags  -fsanitize=thread -pie
2713         add_ldflags -fsanitize=thread -pie
2714         case "$toolchain" in
2715             gcc-tsan)
2716                 add_cflags  -fPIC
2717                 add_ldflags -fPIC
2718                 ;;
2719         esac
2720     ;;
2721     *-usan)
2722         cc_default="${toolchain%-usan}"
2723         add_cflags  -fsanitize=undefined
2724         add_ldflags -fsanitize=undefined
2725         case "$toolchain" in
2726             clang-usan)
2727                 add_cflags -O1
2728                 ;;
2729         esac
2730     ;;
2731     valgrind-*)
2732         target_exec_default="valgrind"
2733         case "$toolchain" in
2734             valgrind-massif)
2735                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2736                 ;;
2737             valgrind-memcheck)
2738                 target_exec_args="--track-origins=yes --leak-check=full"
2739                 ;;
2740         esac
2741     ;;
2742     msvc)
2743         # Check whether the current MSVC version needs the C99 converter.
2744         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2745         # support enough of C99 to build libav. Default to the new
2746         # behaviour if the regexp was unable to match anything, since this
2747         # successfully parses the version number of existing supported
2748         # versions that require the converter (MSVC 2010 and 2012).
2749         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2750         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2751             cc_default="cl"
2752         else
2753             cc_default="c99wrap cl"
2754         fi
2755         ld_default="$source_path/compat/windows/mslink"
2756         nm_default="dumpbin -symbols"
2757         ar_default="lib"
2758         case "$arch" in
2759         arm*)
2760             as_default="armasm"
2761             ;;
2762         esac
2763         target_os_default="win32"
2764         # Use a relative path for TMPDIR. This makes sure all the
2765         # ffconf temp files are written with a relative path, avoiding
2766         # issues with msys/win32 path conversion for MSVC parameters
2767         # such as -Fo<file> or -out:<file>.
2768         TMPDIR=.
2769     ;;
2770     icl)
2771         cc_default="icl"
2772         ld_default="xilink"
2773         nm_default="dumpbin -symbols"
2774         ar_default="xilib"
2775         target_os_default="win32"
2776         TMPDIR=.
2777     ;;
2778     gcov)
2779         add_cflags  -fprofile-arcs -ftest-coverage
2780         add_ldflags -fprofile-arcs -ftest-coverage
2781     ;;
2782     llvm-cov)
2783         add_cflags -fprofile-arcs -ftest-coverage
2784         add_ldflags --coverage
2785     ;;
2786     hardened)
2787         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2788         add_cflags   -fno-strict-overflow -fstack-protector-all
2789         add_ldflags  -Wl,-z,relro -Wl,-z,now
2790     ;;
2791     ?*)
2792         die "Unknown toolchain $toolchain"
2793     ;;
2794 esac
2795
2796 test -n "$cross_prefix" && enable cross_compile
2797
2798 if enabled cross_compile; then
2799     test -n "$arch" && test -n "$target_os" ||
2800         die "Must specify target arch and OS when cross-compiling"
2801 fi
2802
2803 ar_default="${cross_prefix}${ar_default}"
2804 cc_default="${cross_prefix}${cc_default}"
2805 occ_default="${cross_prefix}${occ_default}"
2806 nm_default="${cross_prefix}${nm_default}"
2807 pkg_config_default="${cross_prefix}${pkg_config_default}"
2808 ranlib="${cross_prefix}${ranlib}"
2809 strip="${cross_prefix}${strip}"
2810
2811 sysinclude_default="${sysroot}/usr/include"
2812
2813 set_default arch cc pkg_config sysinclude target_exec target_os
2814 enabled cross_compile || host_cc_default=$cc
2815 set_default host_cc
2816
2817 if ! $pkg_config --version >/dev/null 2>&1; then
2818     warn "$pkg_config not found, library detection may fail."
2819     pkg_config=false
2820 fi
2821
2822 exesuf() {
2823     case $1 in
2824         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2825     esac
2826 }
2827
2828 EXESUF=$(exesuf $target_os)
2829 HOSTEXESUF=$(exesuf $host_os)
2830
2831 # set temporary file name
2832 : ${TMPDIR:=$TEMPDIR}
2833 : ${TMPDIR:=$TMP}
2834 : ${TMPDIR:=/tmp}
2835
2836 if ! check_cmd mktemp -u XXXXXX; then
2837     # simple replacement for missing mktemp
2838     # NOT SAFE FOR GENERAL USE
2839     mktemp(){
2840         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2841     }
2842 fi
2843
2844 tmpfile(){
2845     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2846         (set -C; exec > $tmp) 2>/dev/null ||
2847         die "Unable to create temporary file in $TMPDIR."
2848     append TMPFILES $tmp
2849     eval $1=$tmp
2850 }
2851
2852 trap 'rm -f -- $TMPFILES' EXIT
2853
2854 tmpfile TMPASM .asm
2855 tmpfile TMPC   .c
2856 tmpfile TMPE   $EXESUF
2857 tmpfile TMPH   .h
2858 tmpfile TMPO   .o
2859 tmpfile TMPS   .S
2860 tmpfile TMPSH  .sh
2861 tmpfile TMPV   .ver
2862
2863 unset -f mktemp
2864
2865 chmod +x $TMPE
2866
2867 # make sure we can execute files in $TMPDIR
2868 cat > $TMPSH 2>> $logfile <<EOF
2869 #! /bin/sh
2870 EOF
2871 chmod +x $TMPSH >> $logfile 2>&1
2872 if ! $TMPSH >> $logfile 2>&1; then
2873     cat <<EOF
2874 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2875 variable to another directory and make sure that it is not mounted noexec.
2876 EOF
2877     die "Sanity test failed."
2878 fi
2879
2880 armasm_flags(){
2881     for flag; do
2882         case $flag in
2883             # Filter out MSVC cl.exe options from cflags that shouldn't
2884             # be passed to gas-preprocessor
2885             -M[TD]*)                                            ;;
2886             *)                  echo $flag                      ;;
2887         esac
2888    done
2889 }
2890
2891 ccc_flags(){
2892     for flag; do
2893         case $flag in
2894             -std=c99)           echo -c99                       ;;
2895             -mcpu=*)            echo -arch ${flag#*=}           ;;
2896             -mieee)             echo -ieee                      ;;
2897             -O*|-fast)          echo $flag                      ;;
2898             -fno-math-errno)    echo -assume nomath_errno       ;;
2899             -g)                 echo -g3                        ;;
2900             -Wall)              echo -msg_enable level2         ;;
2901             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2902             -Wl,*)              echo $flag                      ;;
2903             -f*|-W*)                                            ;;
2904             *)                  echo $flag                      ;;
2905         esac
2906    done
2907 }
2908
2909 cparser_flags(){
2910     for flag; do
2911         case $flag in
2912             -Wno-switch)             echo -Wno-switch-enum ;;
2913             -Wno-format-zero-length) ;;
2914             -Wdisabled-optimization) ;;
2915             -Wno-pointer-sign)       echo -Wno-other ;;
2916             *)                       echo $flag ;;
2917         esac
2918     done
2919 }
2920
2921 msvc_common_flags(){
2922     for flag; do
2923         case $flag in
2924             # In addition to specifying certain flags under the compiler
2925             # specific filters, they must be specified here as well or else the
2926             # generic catch all at the bottom will print the original flag.
2927             -Wall)                ;;
2928             -std=c99)             ;;
2929             # Common flags
2930             -fomit-frame-pointer) ;;
2931             -g)                   echo -Z7 ;;
2932             -fno-math-errno)      ;;
2933             -fno-common)          ;;
2934             -fno-signed-zeros)    ;;
2935             -fPIC)                ;;
2936             -mthumb)              ;;
2937             -march=*)             ;;
2938             -lz)                  echo zlib.lib ;;
2939             -lavifil32)           echo vfw32.lib ;;
2940             -lavicap32)           echo vfw32.lib user32.lib ;;
2941             -lx264)               echo libx264.lib ;;
2942             -l*)                  echo ${flag#-l}.lib ;;
2943             -L*)                  echo -libpath:${flag#-L} ;;
2944             *)                    echo $flag ;;
2945         esac
2946     done
2947 }
2948
2949 msvc_flags(){
2950     msvc_common_flags "$@"
2951     for flag; do
2952         case $flag in
2953             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2954                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2955                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2956                                        -wd4273 -wd4554 -wd4701 ;;
2957         esac
2958     done
2959 }
2960
2961 icl_flags(){
2962     msvc_common_flags "$@"
2963     for flag; do
2964         case $flag in
2965             # Despite what Intel's documentation says -Wall, which is supported
2966             # on Windows, does enable remarks so disable them here.
2967             -Wall)                echo $flag -Qdiag-disable:remark ;;
2968             -std=c99)             echo -Qstd=c99 ;;
2969         esac
2970     done
2971 }
2972
2973 pgi_flags(){
2974     for flag; do
2975         case $flag in
2976             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2977             -fomit-frame-pointer) echo -Mnoframe ;;
2978             -g)                   echo -gopt ;;
2979             *)                    echo $flag ;;
2980         esac
2981     done
2982 }
2983
2984 suncc_flags(){
2985     for flag; do
2986         case $flag in
2987             -march=*|-mcpu=*)
2988                 case "${flag#*=}" in
2989                     native)                   echo -xtarget=native       ;;
2990                     v9|niagara)               echo -xarch=sparc          ;;
2991                     ultrasparc)               echo -xarch=sparcvis       ;;
2992                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2993                     i586|pentium)             echo -xchip=pentium        ;;
2994                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2995                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2996                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2997                     pentium4*)          echo -xtarget=pentium4           ;;
2998                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2999                     *-sse3)             echo -xarch=sse3                 ;;
3000                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3001                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3002                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3003                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3004                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3005                     k8|opteron|athlon64|athlon-fx)
3006                                                echo -xarch=sse2a         ;;
3007                     athlon*)                   echo -xarch=pentium_proa  ;;
3008                 esac
3009                 ;;
3010             -std=c99)             echo -xc99              ;;
3011             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3012             -fPIC)                echo -KPIC -xcode=pic32 ;;
3013             -W*,*)                echo $flag              ;;
3014             -f*-*|-W*|-mimpure-text)                      ;;
3015             -shared)              echo -G                 ;;
3016             *)                    echo $flag              ;;
3017         esac
3018     done
3019 }
3020
3021 tms470_flags(){
3022     for flag; do
3023         case $flag in
3024             -march=*|-mcpu=*)
3025                 case "${flag#*=}" in
3026                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3027                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3028                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3029                     armv6*|arm11*)          echo -mv=6   ;;
3030                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3031                                             echo -mv=5e  ;;
3032                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3033                 esac
3034                 ;;
3035             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3036             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3037             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3038             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3039             -msoft-float)   echo --float_support=vfplib       ;;
3040             -O[0-3]|-mf=*)  echo $flag                        ;;
3041             -g)             echo -g -mn                       ;;
3042             -pds=*)         echo $flag                        ;;
3043             -D*|-I*)        echo $flag                        ;;
3044             --gcc|--abi=*)  echo $flag                        ;;
3045             -me)            echo $flag                        ;;
3046         esac
3047     done
3048 }
3049
3050 probe_cc(){
3051     pfx=$1
3052     _cc=$2
3053
3054     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3055     unset _ld_o _ldflags _ld_lib _ld_path
3056     unset _depflags _DEPCMD _DEPFLAGS
3057     _flags_filter=echo
3058
3059     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3060         _type=llvm_gcc
3061         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3062         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3063         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3064         _cflags_speed='-O3'
3065         _cflags_size='-Os'
3066     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3067         _type=gcc
3068         gcc_version=$($_cc --version | head -n1)
3069         gcc_basever=$($_cc -dumpversion)
3070         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3071         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3072         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3073         if ! $_cc -dumpversion | grep -q '^2\.'; then
3074             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3075         fi
3076         _cflags_speed='-O3'
3077         _cflags_size='-Os'
3078     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3079         _type=icc
3080         _ident=$($_cc --version | head -n1)
3081         _depflags='-MMD'
3082         _cflags_speed='-O3'
3083         _cflags_size='-Os'
3084         _cflags_noopt='-O1'
3085     elif $_cc -v 2>&1 | grep -q xlc; then
3086         _type=xlc
3087         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3088         _cflags_speed='-O5'
3089         _cflags_size='-O5 -qcompact'
3090     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3091         _type=ccc
3092         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3093         _DEPFLAGS='-M'
3094         _cflags_speed='-fast'
3095         _cflags_size='-O1'
3096         _flags_filter=ccc_flags
3097     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3098         test -d "$sysroot" || die "No valid sysroot specified."
3099         _type=armcc
3100         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3101         armcc_conf="$PWD/armcc.conf"
3102         $_cc --arm_linux_configure                 \
3103              --arm_linux_config_file="$armcc_conf" \
3104              --configure_sysroot="$sysroot"        \
3105              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3106              die "Error creating armcc configuration file."
3107         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3108         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3109         as_default="${cross_prefix}gcc"
3110         _depflags='-MMD'
3111         _cflags_speed='-O3'
3112         _cflags_size='-Os'
3113     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3114         _type=tms470
3115         _ident=$($_cc -version | head -n1 | tr -s ' ')
3116         _flags='--gcc --abi=eabi -me'
3117         _cc_e='-ppl -fe=$@'
3118         _cc_o='-fe=$@'
3119         _depflags='-ppa -ppd=$(@:.o=.d)'
3120         _cflags_speed='-O3 -mf=5'
3121         _cflags_size='-O3 -mf=2'
3122         _flags_filter=tms470_flags
3123     elif $_cc -v 2>&1 | grep -q clang; then
3124         _type=clang
3125         _ident=$($_cc --version 2>/dev/null | head -n1)
3126         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3127         _cflags_speed='-O3'
3128         _cflags_size='-Os'
3129     elif $_cc -V 2>&1 | grep -q Sun; then
3130         _type=suncc
3131         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3132         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3133         _DEPFLAGS='-xM1 -xc99'
3134         _ldflags='-std=c99'
3135         _cflags_speed='-O5'
3136         _cflags_size='-O5 -xspace'
3137         _flags_filter=suncc_flags
3138     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3139         _type=pathscale
3140         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3141         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3142         _cflags_speed='-O2'
3143         _cflags_size='-Os'
3144         _flags_filter='filter_out -Wdisabled-optimization'
3145     elif $_cc -v 2>&1 | grep -q Open64; then
3146         _type=open64
3147         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3148         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3149         _cflags_speed='-O2'
3150         _cflags_size='-Os'
3151         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3152     elif $_cc -V 2>&1 | grep -q Portland; then
3153         _type=pgi
3154         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3155         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3156         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3157         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3158         _cflags_noopt="-O1"
3159         _flags_filter=pgi_flags
3160     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3161         _type=armasm
3162         _ident=$($_cc | head -n1)
3163         # 4509: "This form of conditional instruction is deprecated"
3164         _flags="-nologo -ignore 4509"
3165         _flags_filter=armasm_flags
3166     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3167         _type=msvc
3168         _ident=$($_cc 2>&1 | head -n1)
3169         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3170         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3171         _cflags_speed="-O2"
3172         _cflags_size="-O1"
3173         if $_cc -nologo- 2>&1 | grep -q Linker; then
3174             _ld_o='-out:$@'
3175         else
3176             _ld_o='-Fe$@'
3177         fi
3178         _cc_o='-Fo$@'
3179         _cc_e='-P -Fi$@'
3180         _flags_filter=msvc_flags
3181         _ld_lib='lib%.a'
3182         _ld_path='-libpath:'
3183         _flags='-nologo'
3184         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3185     elif $_cc 2>&1 | grep -q Intel; then
3186         _type=icl
3187         _ident=$($_cc 2>&1 | head -n1)
3188         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3189         # Not only is O3 broken on 13.x+ but it is slower on all previous
3190         # versions (tested) as well.
3191         _cflags_speed="-O2"
3192         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3193         if $_cc 2>&1 | grep -q Linker; then
3194             _ld_o='-out:$@'
3195         else
3196             _ld_o='-Fe$@'
3197         fi
3198         _cc_o='-Fo$@'
3199         _cc_e='-P'
3200         _flags_filter=icl_flags
3201         _ld_lib='lib%.a'
3202         _ld_path='-libpath:'
3203         # -Qdiag-error to make icl error when seeing certain unknown arguments
3204         _flags='-nologo -Qdiag-error:4044,10157'
3205         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3206         # with MSVC which enables it by default.
3207         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3208     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3209         _type=cparser
3210         _ident=$($_cc --version | head -n1)
3211         _depflags='-MMD'
3212         _cflags_speed='-O4'
3213         _cflags_size='-O2'
3214         _flags_filter=cparser_flags
3215     fi
3216
3217     eval ${pfx}_type=\$_type
3218     eval ${pfx}_ident=\$_ident
3219 }
3220
3221 set_ccvars(){
3222     eval ${1}_C=\${_cc_c-\${${1}_C}}
3223     eval ${1}_E=\${_cc_e-\${${1}_E}}
3224     eval ${1}_O=\${_cc_o-\${${1}_O}}
3225
3226     if [ -n "$_depflags" ]; then
3227         eval ${1}_DEPFLAGS=\$_depflags
3228     else
3229         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3230         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3231         eval DEP${1}FLAGS=\$_flags
3232     fi
3233 }
3234
3235 probe_cc cc "$cc"
3236 cflags_filter=$_flags_filter
3237 cflags_speed=$_cflags_speed
3238 cflags_size=$_cflags_size
3239 cflags_noopt=$_cflags_noopt
3240 add_cflags $_flags $_cflags
3241 cc_ldflags=$_ldflags
3242 set_ccvars CC
3243
3244 probe_cc hostcc "$host_cc"
3245 host_cflags_filter=$_flags_filter
3246 add_host_cflags  $_flags $_cflags
3247 set_ccvars HOSTCC
3248
3249 test -n "$cc_type" && enable $cc_type ||
3250     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3251
3252 : ${as_default:=$cc}
3253 : ${objcc_default:=$cc}
3254 : ${dep_cc_default:=$cc}
3255 : ${ld_default:=$cc}
3256 : ${host_ld_default:=$host_cc}
3257 set_default ar as objcc dep_cc ld host_ld
3258
3259 probe_cc as "$as"
3260 asflags_filter=$_flags_filter
3261 add_asflags $_flags $_cflags
3262 set_ccvars AS
3263
3264 probe_cc objcc "$objcc"
3265 objcflags_filter=$_flags_filter
3266 add_objcflags $_flags $_cflags
3267 set_ccvars OBJC
3268
3269 probe_cc ld "$ld"
3270 ldflags_filter=$_flags_filter
3271 add_ldflags $_flags $_ldflags
3272 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3273 LD_O=${_ld_o-$LD_O}
3274 LD_LIB=${_ld_lib-$LD_LIB}
3275 LD_PATH=${_ld_path-$LD_PATH}
3276
3277 probe_cc hostld "$host_ld"
3278 host_ldflags_filter=$_flags_filter
3279 add_host_ldflags $_flags $_ldflags
3280 HOSTLD_O=${_ld_o-$HOSTLD_O}
3281
3282 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3283     probe_cc depcc "$dep_cc"
3284     CCDEP=${_DEPCMD:-$DEPCMD}
3285     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3286     DEPCCFLAGS=$_flags
3287 fi
3288
3289 if $ar 2>&1 | grep -q Microsoft; then
3290     arflags="-nologo"
3291     ar_o='-out:$@'
3292 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3293     arflags="rq"
3294     ar_o='$@'
3295 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3296     arflags='-Xany -r -c'
3297     ar_o='$@'
3298 else
3299     arflags="rc"
3300     ar_o='$@'
3301 fi
3302
3303 add_cflags $extra_cflags
3304 add_objcflags $extra_objcflags
3305 add_asflags $extra_cflags
3306
3307 if test -n "$sysroot"; then
3308     case "$cc_type" in
3309         gcc|llvm_gcc|clang)
3310             add_cppflags --sysroot="$sysroot"
3311             add_ldflags --sysroot="$sysroot"
3312         ;;
3313         tms470)
3314             add_cppflags -I"$sysinclude"
3315             add_ldflags  --sysroot="$sysroot"
3316         ;;
3317     esac
3318 fi
3319
3320 if test "$cpu" = host; then
3321     enabled cross_compile &&
3322         die "--cpu=host makes no sense when cross-compiling."
3323
3324     case "$cc_type" in
3325         gcc|llvm_gcc)
3326             check_native(){
3327                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3328                 sed -n "/cc1.*$1=/{
3329                             s/.*$1=\\([^ ]*\\).*/\\1/
3330                             p
3331                             q
3332                         }" $TMPE
3333             }
3334             cpu=$(check_native -march || check_native -mcpu)
3335         ;;
3336     esac
3337
3338     test "${cpu:-host}" = host &&
3339         die "--cpu=host not supported with compiler $cc"
3340 fi
3341
3342 # Deal with common $arch aliases
3343 case "$arch" in
3344     aarch64|arm64)
3345         arch="aarch64"
3346     ;;
3347     arm*)
3348         arch="arm"
3349     ;;
3350     mips*|IP*)
3351         case "$arch" in
3352         *el)
3353             add_cppflags -EL
3354             add_ldflags -EL
3355         ;;
3356         *eb)
3357             add_cppflags -EB
3358             add_ldflags -EB
3359         ;;
3360         esac
3361         arch="mips"
3362     ;;
3363     parisc*|hppa*)
3364         arch="parisc"
3365     ;;
3366     "Power Macintosh"|ppc*|powerpc*)
3367         arch="ppc"
3368     ;;
3369     s390|s390x)
3370         arch="s390"
3371     ;;
3372     sh4|sh)
3373         arch="sh4"
3374     ;;
3375     sun4u|sparc*)
3376         arch="sparc"
3377     ;;
3378     tilegx|tile-gx)
3379         arch="tilegx"
3380     ;;
3381     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3382         arch="x86"
3383     ;;
3384 esac
3385
3386 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3387 enable $arch
3388
3389 # Add processor-specific flags
3390 if enabled aarch64; then
3391
3392     case $cpu in
3393         armv*)
3394             cpuflags="-march=$cpu"
3395         ;;
3396         *)
3397             cpuflags="-mcpu=$cpu"
3398         ;;
3399     esac
3400
3401 elif enabled alpha; then
3402
3403     cpuflags="-mcpu=$cpu"
3404
3405 elif enabled arm; then
3406
3407     check_arm_arch() {
3408         check_cpp_condition stddef.h \
3409             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3410             $cpuflags
3411     }
3412
3413     probe_arm_arch() {
3414         if   check_arm_arch 4;        then echo armv4;
3415         elif check_arm_arch 4T;       then echo armv4t;
3416         elif check_arm_arch 5;        then echo armv5;
3417         elif check_arm_arch 5E;       then echo armv5e;
3418         elif check_arm_arch 5T;       then echo armv5t;
3419         elif check_arm_arch 5TE;      then echo armv5te;
3420         elif check_arm_arch 5TEJ;     then echo armv5te;
3421         elif check_arm_arch 6;        then echo armv6;
3422         elif check_arm_arch 6J;       then echo armv6j;
3423         elif check_arm_arch 6K;       then echo armv6k;
3424         elif check_arm_arch 6Z;       then echo armv6z;
3425         elif check_arm_arch 6ZK;      then echo armv6zk;
3426         elif check_arm_arch 6T2;      then echo armv6t2;
3427         elif check_arm_arch 7;        then echo armv7;
3428         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3429         elif check_arm_arch 7S;       then echo armv7-a;
3430         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3431         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3432         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3433         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3434         fi
3435     }
3436
3437     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3438
3439     case $cpu in
3440         armv*)
3441             cpuflags="-march=$cpu"
3442             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3443         ;;
3444         *)
3445             cpuflags="-mcpu=$cpu"
3446             case $cpu in
3447                 cortex-a*)                               subarch=armv7a  ;;
3448                 cortex-r*)                               subarch=armv7r  ;;
3449                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3450                 arm11*)                                  subarch=armv6   ;;
3451                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3452                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3453                 *)                             subarch=$(probe_arm_arch) ;;
3454             esac
3455         ;;
3456     esac
3457
3458     case "$subarch" in
3459         armv5t*)    enable fast_clz                ;;
3460         armv[6-8]*) enable fast_clz fast_unaligned ;;
3461     esac
3462
3463 elif enabled avr32; then
3464
3465     case $cpu in
3466         ap7[02]0[0-2])
3467             subarch="avr32_ap"
3468             cpuflags="-mpart=$cpu"
3469         ;;
3470         ap)
3471             subarch="avr32_ap"
3472             cpuflags="-march=$cpu"
3473         ;;
3474         uc3[ab]*)
3475             subarch="avr32_uc"
3476             cpuflags="-mcpu=$cpu"
3477         ;;
3478         uc)
3479             subarch="avr32_uc"
3480             cpuflags="-march=$cpu"
3481         ;;
3482     esac
3483
3484 elif enabled bfin; then
3485
3486     cpuflags="-mcpu=$cpu"
3487
3488 elif enabled mips; then
3489
3490     cpuflags="-march=$cpu"
3491
3492 elif enabled ppc; then
3493
3494     disable ldbrx
3495
3496     case $(tolower $cpu) in
3497         601|ppc601|powerpc601)
3498             cpuflags="-mcpu=601"
3499             disable altivec
3500         ;;
3501         603*|ppc603*|powerpc603*)
3502             cpuflags="-mcpu=603"
3503             disable altivec
3504         ;;
3505         604*|ppc604*|powerpc604*)
3506             cpuflags="-mcpu=604"
3507             disable altivec
3508         ;;
3509         g3|75*|ppc75*|powerpc75*)
3510             cpuflags="-mcpu=750"
3511             disable altivec
3512         ;;
3513         g4|745*|ppc745*|powerpc745*)
3514             cpuflags="-mcpu=7450"
3515             disable vsx
3516         ;;
3517         74*|ppc74*|powerpc74*)
3518             cpuflags="-mcpu=7400"
3519             disable vsx
3520         ;;
3521         g5|970|ppc970|powerpc970)
3522             cpuflags="-mcpu=970"
3523             disable vsx
3524         ;;
3525         power[3-6]*)
3526             cpuflags="-mcpu=$cpu"
3527             disable vsx
3528         ;;
3529         power[7-8]*)
3530             cpuflags="-mcpu=$cpu"
3531             enable ldbrx
3532         ;;
3533         cell)
3534             cpuflags="-mcpu=cell"
3535             enable ldbrx
3536             disable vsx
3537         ;;
3538         e500mc)
3539             cpuflags="-mcpu=e500mc"
3540             disable altivec
3541         ;;
3542         e500v2)
3543             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3544             disable altivec
3545             disable dcbzl
3546         ;;
3547         e500)
3548             cpuflags="-mcpu=8540 -mhard-float"
3549             disable altivec
3550             disable dcbzl
3551         ;;
3552     esac
3553
3554 elif enabled sparc; then
3555
3556     case $cpu in
3557         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3558             cpuflags="-mcpu=$cpu"
3559         ;;
3560         ultrasparc*|niagara[234])
3561             cpuflags="-mcpu=$cpu"
3562         ;;
3563     esac
3564
3565 elif enabled x86; then
3566
3567     case $cpu in
3568         i[345]86|pentium)
3569             cpuflags="-march=$cpu"
3570             disable i686
3571             disable mmx
3572         ;;
3573         # targets that do NOT support nopl and conditional mov (cmov)
3574         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3575             cpuflags="-march=$cpu"
3576             disable i686
3577         ;;
3578         # targets that do support nopl and conditional mov (cmov)
3579         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3580             cpuflags="-march=$cpu"
3581             enable i686
3582             enable fast_cmov
3583         ;;
3584         # targets that do support conditional mov but on which it's slow
3585         pentium4|pentium4m|prescott|nocona)
3586             cpuflags="-march=$cpu"
3587             enable i686
3588             disable fast_cmov
3589         ;;
3590     esac
3591
3592 fi
3593
3594 if [ "$cpu" != generic ]; then
3595     add_cflags  $cpuflags
3596     add_asflags $cpuflags
3597     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3598 fi
3599
3600 # compiler sanity check
3601 check_exec <<EOF
3602 int main(void){ return 0; }
3603 EOF
3604 if test "$?" != 0; then
3605     echo "$cc is unable to create an executable file."
3606     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3607         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3608         echo "Only do this if you know what cross compiling means."
3609     fi
3610     die "C compiler test failed."
3611 fi
3612
3613 add_cppflags -D_ISOC99_SOURCE
3614 check_cflags -std=c99
3615 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3616 #include <stdlib.h>
3617 EOF
3618 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3619 #include <stdlib.h>
3620 EOF
3621
3622 add_host_cppflags -D_ISOC99_SOURCE
3623 check_host_cflags -std=c99
3624 check_host_cflags -Wall
3625 check_host_cflags -O3
3626
3627 check_64bit(){
3628     arch32=$1
3629     arch64=$2
3630     expr=$3
3631     check_code cc "" "int test[2*($expr) - 1]" &&
3632         subarch=$arch64 || subarch=$arch32
3633 }
3634
3635 case "$arch" in
3636     aarch64|alpha|ia64)
3637         spic=$shared
3638     ;;
3639     mips)
3640         check_64bit mips mips64 '_MIPS_SIM > 1'
3641         spic=$shared
3642     ;;
3643     parisc)
3644         check_64bit parisc parisc64 'sizeof(void *) > 4'
3645         spic=$shared
3646     ;;
3647     ppc)
3648         check_64bit ppc ppc64 'sizeof(void *) > 4'
3649         spic=$shared
3650     ;;
3651     s390)
3652         check_64bit s390 s390x 'sizeof(void *) > 4'
3653         spic=$shared
3654     ;;
3655     sparc)
3656         check_64bit sparc sparc64 'sizeof(void *) > 4'
3657         spic=$shared
3658     ;;
3659     x86)
3660         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3661         if test "$subarch" = "x86_64"; then
3662             spic=$shared
3663         fi
3664     ;;
3665 esac
3666
3667 enable $subarch
3668 enabled spic && enable_weak pic
3669
3670 # OS specific
3671 case $target_os in
3672     aix)
3673         SHFLAGS=-shared
3674         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3675         enabled shared && add_ldflags -Wl,-brtl
3676         ;;
3677     android)
3678         disable symver
3679         enable section_data_rel_ro
3680         SLIB_INSTALL_NAME='$(SLIBNAME)'
3681         SLIB_INSTALL_LINKS=
3682         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3683         ;;
3684     haiku)
3685         prefix_default="/boot/common"
3686         network_extralibs="-lnetwork"
3687         host_libs=
3688         ;;
3689     sunos)
3690         SHFLAGS='-shared -Wl,-h,$$(@F)'
3691         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3692         network_extralibs="-lsocket -lnsl"
3693         # When using suncc to build, the Solaris linker will mark
3694         # an executable with each instruction set encountered by
3695         # the Solaris assembler.  As our libraries contain their own
3696         # guards for processor-specific code, instead suppress
3697         # generation of the HWCAPS ELF section on Solaris x86 only.
3698         enabled_all suncc x86 &&
3699             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3700             add_ldflags -Wl,-M,mapfile
3701         nm_default='nm -P -g'
3702         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3703         ;;
3704     netbsd)
3705         disable symver
3706         oss_indev_extralibs="-lossaudio"
3707         oss_outdev_extralibs="-lossaudio"
3708         ;;
3709     openbsd|bitrig)
3710         disable symver
3711         SHFLAGS='-shared'
3712         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3713         SLIB_INSTALL_LINKS=
3714         oss_indev_extralibs="-lossaudio"
3715         oss_outdev_extralibs="-lossaudio"
3716         ;;
3717     dragonfly)
3718         disable symver
3719         ;;
3720     freebsd)
3721         ;;
3722     bsd/os)
3723         add_extralibs -lpoll -lgnugetopt
3724         ;;
3725     darwin)
3726         enabled ppc && add_asflags -force_cpusubtype_ALL
3727         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3728         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3729         add_ldflags -Wl,-dynamic,-search_paths_first
3730         SLIBSUF=".dylib"
3731         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3732         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3733         objformat="macho"
3734         enabled x86_64 && objformat="macho64"
3735         enabled_any pic shared ||
3736             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3737         ;;
3738     msys*)
3739         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3740         ;;
3741     mingw32*|mingw64*)
3742         if test $target_os = "mingw32ce"; then
3743             disable network
3744         else
3745             target_os=mingw32
3746         fi
3747         LIBTARGET=i386
3748         if enabled x86_64; then
3749             LIBTARGET="i386:x86-64"
3750         elif enabled arm; then
3751             LIBTARGET=arm-wince
3752         fi
3753         check_ldflags -Wl,--nxcompat
3754         check_ldflags -Wl,--dynamicbase
3755         shlibdir_default="$bindir_default"
3756         SLIBPREF=""
3757         SLIBSUF=".dll"
3758         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3759         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3760         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3761         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3762         SLIB_INSTALL_LINKS=
3763         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3764         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3765         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3766         objformat="win32"
3767         dlltool="${cross_prefix}dlltool"
3768         ranlib=:
3769         enable dos_paths
3770         ;;
3771     win32|win64)
3772         disable symver
3773         if enabled shared; then
3774             # Link to the import library instead of the normal static library
3775             # for shared libs.
3776             LD_LIB='%.lib'
3777             # Cannot build both shared and static libs with MSVC or icl.
3778             disable static
3779         fi
3780         shlibdir_default="$bindir_default"
3781         SLIBPREF=""
3782         SLIBSUF=".dll"
3783         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3784         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3785         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3786         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3787         SLIB_INSTALL_LINKS=
3788         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3789         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3790         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3791         objformat="win32"
3792         ranlib=:
3793         enable dos_paths
3794         ;;
3795     cygwin*)
3796         target_os=cygwin
3797         shlibdir_default="$bindir_default"
3798         SLIBPREF="cyg"
3799         SLIBSUF=".dll"
3800         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3801         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3802         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3803         SLIB_INSTALL_LINKS=
3804         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3805         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3806         objformat="win32"
3807         enable dos_paths
3808         ;;
3809     *-dos|freedos|opendos)
3810         network_extralibs="-lsocket"
3811         objformat="coff"
3812         enable dos_paths
3813         add_cppflags -U__STRICT_ANSI__
3814         ;;
3815     linux)
3816         enable dv1394
3817         enable section_data_rel_ro
3818         ;;
3819     irix*)
3820         target_os=irix
3821         ranlib="echo ignoring ranlib"
3822         ;;
3823     os/2*)
3824         ln_s="cp -f"
3825         objformat="aout"
3826         add_cppflags -D_GNU_SOURCE
3827         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3828         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3829         LIBSUF="_s.a"
3830         SLIBPREF=""
3831         SLIBSUF=".dll"
3832         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3833         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3834         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3835             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3836             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3837             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3838             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3839         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3840             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3841         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3842         enable dos_paths
3843         ;;
3844     gnu/kfreebsd)
3845         add_cppflags -D_BSD_SOURCE
3846         ;;
3847     gnu)
3848         ;;
3849     qnx)
3850         add_cppflags -D_QNX_SOURCE
3851         network_extralibs="-lsocket"
3852         ;;
3853     symbian)
3854         SLIBSUF=".dll"
3855         enable dos_paths
3856         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3857         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3858         add_ldflags -Wl,--target1-abs,--no-undefined \
3859                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3860                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3861         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3862                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3863                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3864         ;;
3865     osf1)
3866         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3867         ;;
3868     minix)
3869         ;;
3870     plan9)
3871         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3872                      -D_REENTRANT_SOURCE        \
3873                      -D_RESEARCH_SOURCE         \
3874                      -DFD_SETSIZE=96            \
3875                      -DHAVE_SOCK_OPTS
3876         add_compat strtod.o strtod=avpriv_strtod
3877         network_extralibs='-lbsd'
3878         exeobjs=compat/plan9/main.o
3879         cp_f='cp'
3880         ;;
3881     none)
3882         ;;
3883     *)
3884         die "Unknown OS '$target_os'."
3885         ;;
3886 esac
3887
3888 # determine libc flavour
3889
3890 probe_libc(){
3891     pfx=$1
3892     pfx_no_=${pfx%_}
3893     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3894     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3895         eval ${pfx}libc_type=uclibc
3896         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3897     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3898         eval ${pfx}libc_type=glibc
3899         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3900     # MinGW headers can be installed on Cygwin, so check for newlib first.
3901     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3902         eval ${pfx}libc_type=newlib
3903         add_${pfx}cppflags -U__STRICT_ANSI__
3904     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3905     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3906         eval ${pfx}libc_type=mingw64
3907         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3908         eval test \$${pfx_no_}cc_type = "gcc" &&
3909             add_${pfx}cppflags -D__printf__=__gnu_printf__
3910     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3911          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3912         eval ${pfx}libc_type=mingw32
3913         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3914             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3915             die "ERROR: MinGW32 runtime version must be >= 3.15."
3916         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3917         eval test \$${pfx_no_}cc_type = "gcc" &&
3918             add_${pfx}cppflags -D__printf__=__gnu_printf__
3919     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3920         eval ${pfx}libc_type=msvcrt
3921         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3922             if [ "$pfx" = host_ ]; then
3923                 add_host_cppflags -Dsnprintf=_snprintf
3924             else
3925                 add_compat strtod.o strtod=avpriv_strtod
3926                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3927                                              _snprintf=avpriv_snprintf  \
3928                                              vsnprintf=avpriv_vsnprintf
3929             fi
3930         fi
3931         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3932         # 0x601 by default unless something else is set by the user.
3933         # This can easily lead to us detecting functions only present
3934         # in such new versions and producing binaries requiring windows 7.0.
3935         # Therefore explicitly set the default to XP unless the user has
3936         # set something else on the command line.
3937         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3938         # family. For these cases, configure is free to use any functions
3939         # found in the SDK headers by default. (Alternatively, we could force
3940         # _WIN32_WINNT to 0x0602 in that case.)
3941         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3942             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3943 #ifdef WINAPI_FAMILY
3944 #include <winapifamily.h>
3945 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3946 #error not desktop
3947 #endif
3948 #endif
3949 EOF
3950     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3951         eval ${pfx}libc_type=klibc
3952     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3953         eval ${pfx}libc_type=bionic
3954     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3955         eval ${pfx}libc_type=solaris
3956         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3957     else
3958         eval ${pfx}libc_type=default
3959         add_${pfx}cppflags -D_DEFAULT_SOURCE
3960     fi
3961 }
3962
3963 probe_libc
3964 test -n "$libc_type" && enable libc_$libc_type
3965 probe_libc host_
3966 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3967
3968 case $libc_type in
3969     bionic)
3970         add_compat strtod.o strtod=avpriv_strtod
3971         ;;
3972 esac
3973
3974 # hacks for compiler/libc/os combinations
3975
3976 if enabled_all tms470 libc_glibc; then
3977     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3978     add_cppflags -D__USER_LABEL_PREFIX__=
3979     add_cppflags -D__builtin_memset=memset
3980     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3981     add_cflags   -pds=48    # incompatible redefinition of macro
3982 fi
3983
3984 if enabled_all ccc libc_glibc; then
3985     add_ldflags -Wl,-z,now  # calls to libots crash without this
3986 fi
3987
3988 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3989     add_cppflags '-I\$(SRC_PATH)/compat/float'
3990
3991 esc(){
3992     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3993 }
3994
3995 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3996
3997 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3998
3999 set_default $PATHS_LIST
4000 set_default nm
4001
4002 # we need to build at least one lib type
4003 if ! enabled_any static shared; then
4004     cat <<EOF
4005 At least one library type must be built.
4006 Specify --enable-static to build the static libraries or --enable-shared to
4007 build the shared libraries as well. To only build the shared libraries specify
4008 --disable-static in addition to --enable-shared.
4009 EOF
4010     exit 1;
4011 fi
4012
4013 die_license_disabled() {
4014     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4015 }
4016
4017 die_license_disabled gpl libcdio
4018 die_license_disabled gpl libx264
4019 die_license_disabled gpl libx265
4020 die_license_disabled gpl libxavs
4021 die_license_disabled gpl libxvid
4022 die_license_disabled gpl x11grab
4023
4024 die_license_disabled nonfree cuda
4025 die_license_disabled nonfree libfaac
4026 die_license_disabled nonfree libfdk_aac
4027 die_license_disabled nonfree nvenc
4028 die_license_disabled nonfree openssl
4029
4030 die_license_disabled version3 libopencore_amrnb
4031 die_license_disabled version3 libopencore_amrwb
4032 die_license_disabled version3 libvo_aacenc
4033 die_license_disabled version3 libvo_amrwbenc
4034
4035 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4036
4037 disabled optimizations || check_cflags -fomit-frame-pointer
4038
4039 enable_weak_pic() {
4040     disabled pic && return
4041     enable pic
4042     add_cppflags -DPIC
4043     case "$target_os" in
4044     mingw*|cygwin*)
4045         ;;
4046     *)
4047         add_cflags -fPIC
4048         ;;
4049     esac
4050     add_asflags  -fPIC
4051 }
4052
4053 enabled pic && enable_weak_pic
4054
4055 check_cc <<EOF || die "Symbol mangling check failed."
4056 int ff_extern;
4057 EOF
4058 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4059 extern_prefix=${sym%%ff_extern*}
4060
4061 check_cc <<EOF && enable_weak inline_asm
4062 void foo(void) { __asm__ volatile ("" ::); }
4063 EOF
4064
4065 _restrict=
4066 for restrict_keyword in restrict __restrict__ __restrict; do
4067     check_cc <<EOF && _restrict=$restrict_keyword && break
4068 void foo(char * $restrict_keyword p);
4069 EOF
4070 done
4071
4072 check_cc <<EOF && enable pragma_deprecated
4073 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4074 EOF
4075
4076 check_cc <<EOF && enable attribute_packed
4077 struct { int x; } __attribute__((packed)) x;
4078 EOF
4079
4080 check_cc <<EOF && enable attribute_may_alias
4081 union { int x; } __attribute__((may_alias)) x;
4082 EOF
4083
4084 check_cc <<EOF || die "endian test failed"
4085 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4086 EOF
4087 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4088
4089 check_gas() {
4090     log "check_gas using '$as' as AS"
4091     # :vararg is used on aarch64, arm and ppc altivec
4092     check_as <<EOF || return 1
4093 .macro m n, y:vararg=0
4094 \n: .int \y
4095 .endm
4096 m x
4097 EOF
4098     # .altmacro is only used in arm asm
4099     ! enabled arm || check_as <<EOF || return 1
4100 .altmacro
4101 EOF
4102     enable gnu_as
4103     return 0
4104 }
4105
4106 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4107     nogas=:
4108     enabled_any arm aarch64 && nogas=die
4109     enabled_all ppc altivec && nogas=warn
4110     as_noop=-v
4111
4112     case $as_type in
4113         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4114         gcc)  gaspp_as_type=gas ;;
4115         *)    gaspp_as_type=$as_type ;;
4116     esac
4117
4118     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4119
4120     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4121         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4122
4123     if ! check_gas ; then
4124         as=${gas:=$as}
4125         check_gas || \
4126             $nogas "GNU assembler not found, install/update gas-preprocessor"
4127     fi
4128
4129     check_as <<EOF && enable as_func
4130 .func test
4131 .endfunc
4132 EOF
4133 fi
4134
4135 check_inline_asm inline_asm_labels '"1:\n"'
4136
4137 if enabled aarch64; then
4138     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4139     # internal assembler in clang 3.3 does not support this instruction
4140     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4141     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4142
4143     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4144
4145 elif enabled alpha; then
4146
4147     check_cflags -mieee
4148
4149 elif enabled arm; then
4150
4151     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4152     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4153     enabled thumb && check_cflags -mthumb || check_cflags -marm
4154
4155     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4156         enable vfp_args
4157     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4158         enable vfp_args
4159     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4160         case "${cross_prefix:-$cc}" in
4161             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4162             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4163 __asm__ (".eabi_attribute 28, 1");
4164 int main(void) { return 0; }
4165 EOF
4166         esac
4167         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4168     fi
4169
4170     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4171     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4172     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4173     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4174     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4175     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4176
4177     [ $target_os = linux ] || [ $target_os = android ] ||
4178         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4179             $ARCH_EXT_LIST_ARM
4180
4181     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4182
4183     check_as <<EOF && enable as_dn_directive
4184 ra .dn d0.i16
4185 .unreq ra
4186 EOF
4187
4188     # llvm's integrated assembler supports .object_arch from llvm 3.5
4189     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4190 .object_arch armv4
4191 EOF
4192
4193     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4194
4195 elif enabled mips; then
4196
4197     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4198
4199     # make sure that only an instruction set is enabled
4200     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4201
4202     if enabled mips64; then
4203         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4204             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4205                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4206     else
4207         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4208             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4209                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4210     fi
4211
4212 elif enabled parisc; then
4213
4214     if enabled gcc; then
4215         case $($cc -dumpversion) in
4216             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4217         esac
4218     fi
4219
4220 elif enabled ppc; then
4221
4222     enable local_aligned_8 local_aligned_16
4223
4224     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4225     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4226     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4227     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4228
4229     # AltiVec flags: The FSF version of GCC differs from the Apple version
4230     if enabled altivec; then
4231         check_cflags -maltivec -mabi=altivec &&
4232         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4233         check_cflags -faltivec
4234
4235         # check if our compiler supports Motorola AltiVec C API
4236         check_cc <<EOF || disable altivec
4237 $inc_altivec_h
4238 int main(void) {
4239     vector signed int v1 = (vector signed int) { 0 };
4240     vector signed int v2 = (vector signed int) { 1 };
4241     v1 = vec_add(v1, v2);
4242     return 0;
4243 }
4244 EOF
4245
4246         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4247     fi
4248
4249     if enabled vsx; then
4250         check_cflags -mvsx &&
4251         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4252     fi
4253
4254     if enabled power8; then
4255         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4256     fi
4257
4258 elif enabled x86; then
4259
4260     check_builtin rdtsc    intrin.h   "__rdtsc()"
4261     check_builtin mm_empty mmintrin.h "_mm_empty()"
4262
4263     enable local_aligned_8 local_aligned_16
4264
4265     # check whether EBP is available on x86
4266     # As 'i' is stored on the stack, this program will crash
4267     # if the base pointer is used to access it because the
4268     # base pointer is cleared in the inline assembly code.
4269     check_exec_crash <<EOF && enable ebp_available
4270 volatile int i=0;
4271 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4272 return i;
4273 EOF
4274
4275     # check whether EBX is available on x86
4276     check_inline_asm ebx_available '""::"b"(0)' &&
4277         check_inline_asm ebx_available '"":::"%ebx"'
4278
4279     # check whether xmm clobbers are supported
4280     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4281
4282     # check whether binutils is new enough to compile SSSE3/MMXEXT
4283     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4284     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4285
4286     if ! disabled_any asm mmx yasm; then
4287         if check_cmd $yasmexe --version; then
4288             enabled x86_64 && yasm_extra="-m amd64"
4289             yasm_debug="-g dwarf2"
4290         elif check_cmd nasm -v; then
4291             yasmexe=nasm
4292             yasm_debug="-g -F dwarf"
4293             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4294         fi
4295
4296         YASMFLAGS="-f $objformat $yasm_extra"
4297         enabled pic               && append YASMFLAGS "-DPIC"
4298         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4299         case "$objformat" in
4300             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4301         esac
4302
4303         check_yasm "movbe ecx, [5]" && enable yasm ||
4304             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4305         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4306         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4307         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4308         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4309         check_yasm "CPU amdnop" || disable cpunop
4310     fi
4311
4312     case "$cpu" in
4313         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4314             disable fast_clz
4315         ;;
4316     esac
4317
4318 fi
4319
4320 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4321
4322 check_ldflags -Wl,--as-needed
4323
4324 if check_func dlopen; then
4325     ldl=
4326 elif check_func dlopen -ldl; then
4327     ldl=-ldl
4328 fi
4329
4330 if ! disabled network; then
4331     check_func getaddrinfo $network_extralibs
4332     check_func inet_aton $network_extralibs
4333
4334     check_type netdb.h "struct addrinfo"
4335     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4336     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4337     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4338     check_type poll.h "struct pollfd"
4339     check_type netinet/sctp.h "struct sctp_event_subscribe"
4340     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4341     check_type netinet/in.h "struct sockaddr_in6"
4342     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4343     check_type "sys/types.h sys/socket.h" socklen_t
4344
4345     # Prefer arpa/inet.h over winsock2
4346     if check_header arpa/inet.h ; then
4347         check_func closesocket
4348     elif check_header winsock2.h ; then
4349         check_func_headers winsock2.h closesocket -lws2 &&
4350             network_extralibs="-lws2" ||
4351         { check_func_headers winsock2.h closesocket -lws2_32 &&
4352             network_extralibs="-lws2_32"; } || disable winsock2_h network
4353         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4354
4355         check_type ws2tcpip.h socklen_t
4356         check_type ws2tcpip.h "struct addrinfo"
4357         check_type ws2tcpip.h "struct group_source_req"
4358         check_type ws2tcpip.h "struct ip_mreq_source"
4359         check_type ws2tcpip.h "struct ipv6_mreq"
4360         check_type winsock2.h "struct pollfd"
4361         check_struct winsock2.h "struct sockaddr" sa_len
4362         check_type ws2tcpip.h "struct sockaddr_in6"
4363         check_type ws2tcpip.h "struct sockaddr_storage"
4364     else
4365         disable network
4366     fi
4367 fi
4368
4369 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4370 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4371 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4372 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4373
4374 case "$custom_allocator" in
4375     jemalloc)
4376         # jemalloc by default does not use a prefix
4377         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4378     ;;
4379     tcmalloc)
4380         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4381         malloc_prefix=tc_
4382     ;;
4383 esac
4384
4385 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4386 check_func  ${malloc_prefix}memalign            && enable memalign
4387 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4388
4389 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4390     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4391
4392 check_func  fcntl
4393 check_func  fork
4394 check_func  gethrtime
4395 check_func  getopt
4396 check_func  getrusage
4397 check_func  gettimeofday
4398 check_func  gmtime_r
4399 check_func  isatty
4400 check_func  localtime_r
4401 check_func  mach_absolute_time
4402 check_func  mkstemp
4403 check_func  mmap
4404 check_func  mprotect
4405 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4406 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4407 check_func  sched_getaffinity
4408 check_func  setrlimit
4409 check_func  strerror_r
4410 check_func  sysconf
4411 check_func  sysctl
4412 check_func  usleep
4413
4414 check_func_headers io.h setmode
4415 check_func_headers stdlib.h getenv
4416
4417 check_func_headers windows.h CoTaskMemFree -lole32
4418 check_func_headers windows.h GetProcessAffinityMask
4419 check_func_headers windows.h GetProcessTimes
4420 check_func_headers windows.h GetSystemTimeAsFileTime
4421 check_func_headers windows.h LoadLibrary
4422 check_func_headers windows.h MapViewOfFile
4423 check_func_headers windows.h SetConsoleTextAttribute
4424 check_func_headers windows.h Sleep
4425 check_func_headers windows.h VirtualAlloc
4426 check_struct windows.h "CONDITION_VARIABLE" Ptr
4427
4428 check_header direct.h
4429 check_header dlfcn.h
4430 check_header d3d11.h
4431 check_header dxva.h
4432 check_header dxva2api.h
4433 check_header io.h
4434 check_header mach/mach_time.h
4435 check_header malloc.h
4436 check_header poll.h
4437 check_header sys/mman.h
4438 check_header sys/param.h
4439 check_header sys/resource.h
4440 check_header sys/select.h
4441 check_header sys/time.h
4442 check_header sys/un.h
4443 check_header unistd.h
4444 check_header valgrind/valgrind.h
4445 check_header vdpau/vdpau.h
4446 check_header vdpau/vdpau_x11.h
4447 check_header VideoDecodeAcceleration/VDADecoder.h
4448 check_header windows.h
4449 check_header X11/extensions/XvMClib.h
4450
4451 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4452 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4453 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4454
4455 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4456
4457 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4458 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4459 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4460
4461 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4462
4463 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4464
4465 if ! disabled w32threads && ! enabled pthreads; then
4466     check_func_headers "windows.h process.h" _beginthreadex &&
4467         enable w32threads || disable w32threads
4468 fi
4469
4470 # check for some common methods of building with pthread support
4471 # do this before the optional library checks as some of them require pthreads
4472 if ! disabled pthreads && ! enabled w32threads; then
4473     enable pthreads
4474     if check_func pthread_join -pthread; then
4475         add_cflags -pthread
4476         add_extralibs -pthread
4477     elif check_func pthread_join -pthreads; then
4478         add_cflags -pthreads
4479         add_extralibs -pthreads
4480     elif check_func pthread_join -lpthreadGC2; then
4481         add_extralibs -lpthreadGC2
4482     elif check_lib pthread.h pthread_join -lpthread; then
4483         :
4484     elif ! check_func pthread_join; then
4485         disable pthreads
4486     fi
4487 fi
4488
4489 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4490 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4491
4492 check_lib math.h sin -lm && LIBM="-lm"
4493 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4494
4495 atan2f_args=2
4496 ldexpf_args=2
4497 powf_args=2
4498
4499 for func in $MATH_FUNCS; do
4500     eval check_mathfunc $func \${${func}_args:-1}
4501 done
4502
4503 # these are off by default, so fail if requested and not available
4504 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4505                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4506                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4507 enabled cuda              && check_lib cuda.h cuInit -lcuda
4508 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4509 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4510 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4511 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4512 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4513 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4514 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4515 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4516 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4517                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4518                                done || die "ERROR: libgsm not found"; }
4519 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4520 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4521 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4522 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4523 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4524 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4525 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4526 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4527 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4528                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4529 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4530 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4531 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4532 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4533 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4534 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4535 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4536 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4537 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4538 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4539 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4540 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4541     enabled libvpx_vp8_decoder && {
4542         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4543             disable libvpx_vp8_decoder;
4544     }
4545     enabled libvpx_vp8_encoder && {
4546         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4547             disable libvpx_vp8_encoder;
4548     }
4549     enabled libvpx_vp9_decoder && {
4550         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4551             disable libvpx_vp9_decoder;
4552     }
4553     enabled libvpx_vp9_encoder && {
4554         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4555             disable libvpx_vp9_encoder;
4556     }
4557     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4558         die "libvpx enabled but no supported decoders found"
4559     fi
4560 }
4561 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4562 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4563 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4564                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4565                                die "ERROR: libx264 version must be >= 0.118."; } &&
4566                              { check_cpp_condition x264.h "X264_MPEG2" &&
4567                                enable libx262; }
4568 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4569                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4570                                die "ERROR: libx265 version must be >= 57."; }
4571 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4572 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4573 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4574                                 { ! enabled cross_compile && {
4575                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4576                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4577                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4578                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4579                                die "ERROR: mmal not found"; }
4580 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4581                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4582                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4583                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4584                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4585                                die "ERROR: openssl not found"; }
4586
4587 if enabled gnutls; then
4588     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4589     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4590 fi
4591
4592 # libdc1394 check
4593 if enabled libdc1394; then
4594     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4595         enable libdc1394_2; } ||
4596     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4597         enable libdc1394_1; } ||
4598     die "ERROR: No version of libdc1394 found "
4599 fi
4600
4601 if enabled nvenc; then
4602     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found.";
4603     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4604     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4605         die "ERROR: NVENC API version 4 or older is not supported";
4606 fi
4607
4608 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4609     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4610     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4611     enable sdl
4612 fi
4613
4614 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4615 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4616
4617 check_header linux/fb.h
4618 check_header linux/videodev2.h
4619 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4620
4621 check_header AVFoundation/AVFoundation.h &&
4622     check_objcflags -fobjc-arc &&
4623     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4624     disable AVFoundation_AVFoundation_h
4625
4626 check_header sys/videoio.h
4627
4628 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4629 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4630 # w32api 3.12 had it defined wrong
4631 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4632
4633 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4634 { check_header dev/bktr/ioctl_meteor.h &&
4635   check_header dev/bktr/ioctl_bt848.h; } ||
4636 { check_header machine/ioctl_meteor.h &&
4637   check_header machine/ioctl_bt848.h; } ||
4638 { check_header dev/video/meteor/ioctl_meteor.h &&
4639   check_header dev/video/bktr/ioctl_bt848.h; } ||
4640 check_header dev/ic/bt8xx.h
4641
4642 check_header sndio.h
4643 check_header sys/soundcard.h
4644 check_header soundcard.h
4645
4646 enabled_any alsa_indev alsa_outdev &&
4647     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4648
4649 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4650     check_func jack_port_get_latency_range -ljack
4651
4652 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4653
4654 if enabled libcdio; then
4655     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4656     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4657     die "ERROR: No usable libcdio/cdparanoia found"
4658 fi
4659
4660 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4661
4662 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4663     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4664         enabled libxcb && die "ERROR: libxcb not found";
4665     } && disable x11grab && enable libxcb
4666
4667     disabled libxcb_shm ||
4668         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4669             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4670         } && check_header sys/shm.h && enable libxcb_shm
4671
4672     disabled libxcb_xfixes ||
4673         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4674             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4675         } && enable libxcb_xfixes
4676
4677     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4678     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4679 fi
4680
4681 if enabled x11grab; then
4682     enabled xlib || die "ERROR: Xlib not found"
4683     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4684     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4685 fi
4686
4687 enabled vaapi &&
4688     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4689     disable vaapi
4690
4691 enabled vaapi && enabled xlib &&
4692     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4693     enable vaapi_x11
4694
4695 enabled vdpau &&
4696     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4697     disable vdpau
4698
4699 enabled vdpau && enabled xlib &&
4700     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4701     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4702     enable vdpau_x11
4703
4704 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4705
4706 # add some useful compiler flags if supported
4707 check_cflags -Wdeclaration-after-statement
4708 check_cflags -Wall
4709 check_cflags -Wdisabled-optimization
4710 check_cflags -Wpointer-arith
4711 check_cflags -Wredundant-decls
4712 check_cflags -Wwrite-strings
4713 check_cflags -Wtype-limits
4714 check_cflags -Wundef
4715 check_cflags -Wmissing-prototypes
4716 check_cflags -Wstrict-prototypes
4717 enabled extra_warnings && check_cflags -Winline
4718 enabled extra_warnings && check_cflags -Wcast-qual
4719
4720 check_disable_warning(){
4721     warning_flag=-W${1#-Wno-}
4722     test_cflags $warning_flag && add_cflags $1
4723 }
4724
4725 check_disable_warning -Wno-parentheses
4726 check_disable_warning -Wno-switch
4727 check_disable_warning -Wno-format-zero-length
4728 check_disable_warning -Wno-pointer-sign
4729
4730 # add some linker flags
4731 check_ldflags -Wl,--warn-common
4732 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4733 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4734 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4735
4736 # add some strip flags
4737 # -wN '..@*' is more selective than -x, but not available everywhere.
4738 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4739
4740 enabled neon_clobber_test &&
4741     check_ldflags -Wl,--wrap,avcodec_open2              \
4742                   -Wl,--wrap,avcodec_decode_audio4      \
4743                   -Wl,--wrap,avcodec_decode_video2      \
4744                   -Wl,--wrap,avcodec_decode_subtitle2   \
4745                   -Wl,--wrap,avcodec_encode_audio2      \
4746                   -Wl,--wrap,avcodec_encode_video2      \
4747                   -Wl,--wrap,avcodec_encode_subtitle    \
4748                   -Wl,--wrap,avresample_convert ||
4749     disable neon_clobber_test
4750
4751 enabled xmm_clobber_test &&
4752     check_ldflags -Wl,--wrap,avcodec_open2              \
4753                   -Wl,--wrap,avcodec_decode_audio4      \
4754                   -Wl,--wrap,avcodec_decode_video2      \
4755                   -Wl,--wrap,avcodec_decode_subtitle2   \
4756                   -Wl,--wrap,avcodec_encode_audio2      \
4757                   -Wl,--wrap,avcodec_encode_video2      \
4758                   -Wl,--wrap,avcodec_encode_subtitle    \
4759                   -Wl,--wrap,avresample_convert         \
4760                   -Wl,--wrap,sws_scale ||
4761     disable xmm_clobber_test
4762
4763 echo "X { local: *; };" > $TMPV
4764 if test_ldflags -Wl,--version-script,$TMPV; then
4765     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4766 elif test_ldflags -Wl,-M,$TMPV; then
4767     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4768 fi
4769
4770 check_cc <<EOF && enable symver_asm_label
4771 void ff_foo(void) __asm__ ("av_foo@VERSION");
4772 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4773 EOF
4774     check_cc <<EOF && enable symver_gnu_asm
4775 __asm__(".symver ff_foo,av_foo@VERSION");
4776 void ff_foo(void) {}
4777 EOF
4778
4779 if [ -z "$optflags" ]; then
4780     if enabled small; then
4781         optflags=$cflags_size
4782     elif enabled optimizations; then
4783         optflags=$cflags_speed
4784     else
4785         optflags=$cflags_noopt
4786     fi
4787 fi
4788
4789 check_optflags(){
4790     check_cflags "$@"
4791     enabled lto && check_ldflags "$@"
4792 }
4793
4794
4795 if enabled lto; then
4796     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4797     check_cflags  -flto
4798     check_ldflags -flto $cpuflags
4799 fi
4800
4801 check_optflags $optflags
4802 check_optflags -fno-math-errno
4803 check_optflags -fno-signed-zeros
4804
4805 if enabled icc; then
4806     # Just warnings, no remarks
4807     check_cflags -w1
4808     # -wd: Disable following warnings
4809     # 144, 167, 556: -Wno-pointer-sign
4810     # 1292: attribute "foo" ignored