avconv: VAAPI hwcontext initialisation and hwaccel helper
[libav.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-libnpp          enable NVIDIA Performance Primitives-based code [no]
199   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
200   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
201   --enable-libopencv       enable video filtering via libopencv [no]
202   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
203   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
204   --enable-libopus         enable Opus de/encoding via libopus [no]
205   --enable-libpulse        enable Pulseaudio input via libpulse [no]
206   --enable-librtmp         enable RTMP[E] support via librtmp [no]
207   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
208   --enable-libsnappy       enable Snappy compression [no]
209   --enable-libspeex        enable Speex de/encoding via libspeex [no]
210   --enable-libtheora       enable Theora encoding via libtheora [no]
211   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
212   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
213   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
214   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
215   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
216   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
217   --enable-libwebp         enable WebP encoding via libwebp [no]
218   --enable-libx264         enable H.264 encoding via x264 [no]
219   --enable-libx265         enable HEVC encoding via x265 [no]
220   --enable-libxavs         enable AVS encoding via xavs [no]
221   --enable-libxcb          enable X11 grabbing using XCB [no]
222   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
223   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
224   --enable-libxvid         enable Xvid encoding via xvidcore,
225                            native MPEG-4/Xvid encoder exists [no]
226   --enable-mmal            enable decoding via MMAL [no]
227   --enable-nvenc           enable encoding via NVENC [no]
228   --enable-openssl         enable openssl [no]
229   --enable-x11grab         enable X11 grabbing (legacy) [no]
230   --enable-zlib            enable zlib [autodetect]
231
232 Toolchain options:
233   --arch=ARCH              select architecture [$arch]
234   --cpu=CPU                select the minimum required CPU (affects
235                            instruction selection, may crash on older CPUs)
236   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
237   --enable-cross-compile   assume a cross-compiler is used
238   --sysroot=PATH           root of cross-build tree
239   --sysinclude=PATH        location of cross-build system headers
240   --target-os=OS           compiler targets OS [$target_os]
241   --target-exec=CMD        command to run executables on target
242   --target-path=DIR        path to view of build directory on target
243   --target-samples=DIR     path to samples directory on target
244   --toolchain=NAME         set tool defaults according to NAME
245   --nm=NM                  use nm tool
246   --ar=AR                  use archive tool AR [$ar_default]
247   --as=AS                  use assembler AS [$as_default]
248   --cc=CC                  use C compiler CC [$cc_default]
249   --objcc=OCC              use ObjC compiler OCC [$cc_default]
250   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
251   --ld=LD                  use linker LD
252   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
253   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
254   --host-cc=HOSTCC         use host C compiler HOSTCC
255   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
256   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
257   --host-ld=HOSTLD         use host linker HOSTLD
258   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
259   --host-libs=HLIBS        use libs HLIBS when linking for host
260   --host-os=OS             compiler host OS [$target_os]
261   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
262   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
263   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
264   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
265   --extra-libs=ELIBS       add ELIBS [$ELIBS]
266   --extra-version=STRING   version string suffix []
267   --optflags=OPTFLAGS      override optimization-related compiler flags
268   --build-suffix=SUFFIX    library name suffix []
269   --enable-pic             build position-independent code
270   --enable-thumb           compile for Thumb instruction set
271   --enable-lto             use link-time optimization
272   --env="ENV=override"     override the environment variables
273
274 Advanced options (experts only):
275   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
276   --custom-allocator=NAME  use a supported custom allocator
277   --disable-symver         disable symbol versioning
278   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
279   --disable-safe-bitstream-reader
280                            disable buffer boundary checking in bitreaders
281                            (faster, but may crash)
282   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
283   --enable-sram            allow use of on-chip SRAM
284
285 Optimization options (experts only):
286   --disable-asm            disable all assembly optimizations
287   --disable-altivec        disable AltiVec optimizations
288   --disable-vsx            disable VSX optimizations
289   --disable-power8         disable POWER8 optimizations
290   --disable-amd3dnow       disable 3DNow! optimizations
291   --disable-amd3dnowext    disable 3DNow! extended optimizations
292   --disable-mmx            disable MMX optimizations
293   --disable-mmxext         disable MMXEXT optimizations
294   --disable-sse            disable SSE optimizations
295   --disable-sse2           disable SSE2 optimizations
296   --disable-sse3           disable SSE3 optimizations
297   --disable-ssse3          disable SSSE3 optimizations
298   --disable-sse4           disable SSE4 optimizations
299   --disable-sse42          disable SSE4.2 optimizations
300   --disable-avx            disable AVX optimizations
301   --disable-xop            disable XOP optimizations
302   --disable-fma3           disable FMA3 optimizations
303   --disable-fma4           disable FMA4 optimizations
304   --disable-avx2           disable AVX2 optimizations
305   --disable-armv5te        disable armv5te optimizations
306   --disable-armv6          disable armv6 optimizations
307   --disable-armv6t2        disable armv6t2 optimizations
308   --disable-vfp            disable VFP optimizations
309   --disable-neon           disable NEON optimizations
310   --disable-inline-asm     disable use of inline assembly
311   --disable-yasm           disable use of nasm/yasm assembly
312
313 Developer options (useful when working on Libav itself):
314   --disable-debug          disable debugging symbols
315   --enable-debug=LEVEL     set the debug level [$debuglevel]
316   --disable-optimizations  disable compiler optimizations
317   --enable-extra-warnings  enable more compiler warnings
318   --samples=PATH           location of test samples for FATE, if not set use
319                            \$LIBAV_SAMPLES at make invocation time.
320   --enable-neon-clobber-test check NEON registers for clobbering (should be
321                            used only for debugging purposes)
322   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
323                            should be used only for debugging purposes)
324   --enable-random          randomly enable/disable components
325   --disable-random
326   --enable-random=LIST     randomly enable/disable specific components or
327   --disable-random=LIST    component groups. LIST is a comma-separated list
328                            of NAME[:PROB] entries where NAME is a component
329                            (group) and PROB the probability associated with
330                            NAME (default 0.5).
331   --random-seed=VALUE      seed value for --enable/disable-random
332   --disable-valgrind-backtrace do not print a backtrace under Valgrind
333                            (only applies to --disable-optimizations builds)
334
335 NOTE: Object files are built at the place where configure is launched.
336 EOF
337   exit 0
338 }
339
340 quotes='""'
341
342 log(){
343     echo "$@" >> $logfile
344 }
345
346 log_file(){
347     log BEGIN $1
348     i=1
349     while read line; do
350         printf '%5s   %s\n' "${i}" "${line}"
351         i=$(($i+1))
352     done < $1 >> $logfile
353     log END $1
354 }
355
356 echolog(){
357     log "$@"
358     echo "$@"
359 }
360
361 warn(){
362     log "WARNING: $*"
363     WARNINGS="${WARNINGS}WARNING: $*\n"
364 }
365
366 die(){
367     echolog "$@"
368     cat <<EOF
369
370 If you think configure made a mistake, make sure you are using the latest
371 version from Git.  If the latest version fails, report the problem to the
372 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
373 EOF
374     if disabled logging; then
375         cat <<EOF
376 Rerun configure with logging enabled (do not use --disable-logging), and
377 include the log this produces with your report.
378 EOF
379     else
380         cat <<EOF
381 Include the log file "$logfile" produced by configure as this will help
382 solving the problem.
383 EOF
384     fi
385     exit 1
386 }
387
388 # Avoid locale weirdness, besides we really just want to translate ASCII.
389 toupper(){
390     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
391 }
392
393 tolower(){
394     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
395 }
396
397 c_escape(){
398     echo "$*" | sed 's/["\\]/\\\0/g'
399 }
400
401 sh_quote(){
402     v=$(echo "$1" | sed "s/'/'\\\\''/g")
403     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
404     echo "$v"
405 }
406
407 cleanws(){
408     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
409 }
410
411 filter(){
412     pat=$1
413     shift
414     for v; do
415         eval "case $v in $pat) echo $v ;; esac"
416     done
417 }
418
419 filter_out(){
420     pat=$1
421     shift
422     for v; do
423         eval "case $v in $pat) ;; *) echo $v ;; esac"
424     done
425 }
426
427 map(){
428     m=$1
429     shift
430     for v; do eval $m; done
431 }
432
433 add_suffix(){
434     suffix=$1
435     shift
436     for v; do echo ${v}${suffix}; done
437 }
438
439 set_all(){
440     value=$1
441     shift
442     for var in $*; do
443         eval $var=$value
444     done
445 }
446
447 set_weak(){
448     value=$1
449     shift
450     for var; do
451         eval : \${$var:=$value}
452     done
453 }
454
455 sanitize_var_name(){
456     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
457 }
458
459 set_safe(){
460     var=$1
461     shift
462     eval $(sanitize_var_name "$var")='$*'
463 }
464
465 get_safe(){
466     eval echo \$$(sanitize_var_name "$1")
467 }
468
469 pushvar(){
470     for pvar in $*; do
471         eval level=\${${pvar}_level:=0}
472         eval ${pvar}_${level}="\$$pvar"
473         eval ${pvar}_level=$(($level+1))
474     done
475 }
476
477 popvar(){
478     for pvar in $*; do
479         eval level=\${${pvar}_level:-0}
480         test $level = 0 && continue
481         eval level=$(($level-1))
482         eval $pvar="\${${pvar}_${level}}"
483         eval ${pvar}_level=$level
484         eval unset ${pvar}_${level}
485     done
486 }
487
488 enable(){
489     set_all yes $*
490 }
491
492 disable(){
493     set_all no $*
494 }
495
496 enable_weak(){
497     set_weak yes $*
498 }
499
500 disable_weak(){
501     set_weak no $*
502 }
503
504 enable_safe(){
505     for var; do
506         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
507     done
508 }
509
510 disable_safe(){
511     for var; do
512         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
513     done
514 }
515
516 do_enable_deep(){
517     for var; do
518         enabled $var && continue
519         eval sel="\$${var}_select"
520         eval sgs="\$${var}_suggest"
521         pushvar var sgs
522         enable_deep $sel
523         popvar sgs
524         enable_deep_weak $sgs
525         popvar var
526     done
527 }
528
529 enable_deep(){
530     do_enable_deep $*
531     enable $*
532 }
533
534 enable_deep_weak(){
535     for var; do
536         disabled $var && continue
537         pushvar var
538         do_enable_deep $var
539         popvar var
540         enable_weak $var
541     done
542 }
543
544 enabled(){
545     test "${1#!}" = "$1" && op== || op=!=
546     eval test "x\$${1#!}" $op "xyes"
547 }
548
549 disabled(){
550     test "${1#!}" = "$1" && op== || op=!=
551     eval test "x\$${1#!}" $op "xno"
552 }
553
554 enabled_all(){
555     for opt; do
556         enabled $opt || return 1
557     done
558 }
559
560 disabled_all(){
561     for opt; do
562         disabled $opt || return 1
563     done
564 }
565
566 enabled_any(){
567     for opt; do
568         enabled $opt && return 0
569     done
570 }
571
572 disabled_any(){
573     for opt; do
574         disabled $opt && return 0
575     done
576     return 1
577 }
578
579 set_default(){
580     for opt; do
581         eval : \${$opt:=\$${opt}_default}
582     done
583 }
584
585 is_in(){
586     value=$1
587     shift
588     for var in $*; do
589         [ $var = $value ] && return 0
590     done
591     return 1
592 }
593
594 do_check_deps(){
595     for cfg; do
596         cfg="${cfg#!}"
597         enabled ${cfg}_checking && die "Circular dependency for $cfg."
598         disabled ${cfg}_checking && continue
599         enable ${cfg}_checking
600         append allopts $cfg
601
602         eval dep_all="\$${cfg}_deps"
603         eval dep_any="\$${cfg}_deps_any"
604         eval dep_sel="\$${cfg}_select"
605         eval dep_sgs="\$${cfg}_suggest"
606         eval dep_ifa="\$${cfg}_if"
607         eval dep_ifn="\$${cfg}_if_any"
608
609         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
610         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
611         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
612
613         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
614         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
615         enabled_all  $dep_all || disable $cfg
616         enabled_any  $dep_any || disable $cfg
617         disabled_any $dep_sel && disable $cfg
618
619         if enabled $cfg; then
620             enable_deep $dep_sel
621             enable_deep_weak $dep_sgs
622         fi
623
624         disable ${cfg}_checking
625     done
626 }
627
628 check_deps(){
629     unset allopts
630
631     do_check_deps "$@"
632
633     for cfg in $allopts; do
634         enabled $cfg || continue
635         eval dep_extralibs="\$${cfg}_extralibs"
636         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
637     done
638 }
639
640 print_config(){
641     pfx=$1
642     files=$2
643     shift 2
644     map 'eval echo "$v \${$v:-no}"' "$@" |
645     awk "BEGIN { split(\"$files\", files) }
646         {
647             c = \"$pfx\" toupper(\$1);
648             v = \$2;
649             sub(/yes/, 1, v);
650             sub(/no/,  0, v);
651             for (f in files) {
652                 file = files[f];
653                 if (file ~ /\\.h\$/) {
654                     printf(\"#define %s %d\\n\", c, v) >>file;
655                 } else if (file ~ /\\.asm\$/) {
656                     printf(\"%%define %s %d\\n\", c, v) >>file;
657                 } else if (file ~ /\\.mak\$/) {
658                     n = -v ? \"\" : \"!\";
659                     printf(\"%s%s=yes\\n\", n, c) >>file;
660                 }
661             }
662         }"
663 }
664
665 print_enabled(){
666     suf=$1
667     shift
668     for v; do
669         enabled $v && printf "%s\n" ${v%$suf};
670     done
671 }
672
673 append(){
674     var=$1
675     shift
676     eval "$var=\"\$$var $*\""
677 }
678
679 prepend(){
680     var=$1
681     shift
682     eval "$var=\"$* \$$var\""
683 }
684
685 unique(){
686     var=$1
687     uniq_list=""
688     for tok in $(eval echo \$$var); do
689         uniq_list="$(filter_out $tok $uniq_list) $tok"
690     done
691     eval "$var=\"${uniq_list}\""
692 }
693
694 add_cppflags(){
695     append CPPFLAGS "$@"
696 }
697
698 add_cflags(){
699     append CFLAGS $($cflags_filter "$@")
700 }
701
702 add_asflags(){
703     append ASFLAGS $($asflags_filter "$@")
704 }
705
706 add_objcflags(){
707     append OBJCFLAGS $($objcflags_filter "$@")
708 }
709
710 add_ldflags(){
711     append LDFLAGS $($ldflags_filter "$@")
712 }
713
714 add_ldexeflags(){
715     append LDEXEFLAGS $($ldflags_filter "$@")
716 }
717
718 add_stripflags(){
719     append STRIPFLAGS "$@"
720 }
721
722 add_extralibs(){
723     prepend extralibs $($ldflags_filter "$@")
724 }
725
726 add_host_cppflags(){
727     append host_cppflags "$@"
728 }
729
730 add_host_cflags(){
731     append host_cflags $($host_cflags_filter "$@")
732 }
733
734 add_host_ldflags(){
735     append host_ldflags $($host_ldflags_filter "$@")
736 }
737
738 add_compat(){
739     append compat_objs $1
740     shift
741     map 'add_cppflags -D$v' "$@"
742 }
743
744 check_cmd(){
745     log "$@"
746     "$@" >> $logfile 2>&1
747 }
748
749 cc_o(){
750     eval printf '%s\\n' $CC_O
751 }
752
753 cc_e(){
754     eval printf '%s\\n' $CC_E
755 }
756
757 check_cc(){
758     log check_cc "$@"
759     cat > $TMPC
760     log_file $TMPC
761     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
762 }
763
764 check_objcc(){
765     log check_objcc "$@"
766     cat > $TMPC
767     log_file $TMPC
768     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
769 }
770
771 check_cpp(){
772     log check_cpp "$@"
773     cat > $TMPC
774     log_file $TMPC
775     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
776 }
777
778 as_o(){
779     eval printf '%s\\n' $AS_O
780 }
781
782 check_as(){
783     log check_as "$@"
784     cat > $TMPS
785     log_file $TMPS
786     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
787 }
788
789 check_inline_asm(){
790     log check_inline_asm "$@"
791     name="$1"
792     code="$2"
793     shift 2
794     disable $name
795     check_cc "$@" <<EOF && enable $name
796 void foo(void){ __asm__ volatile($code); }
797 EOF
798 }
799
800 check_insn(){
801     log check_insn "$@"
802     check_inline_asm ${1}_inline "\"$2\""
803     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
804 }
805
806 check_yasm(){
807     log check_yasm "$@"
808     echo "$1" > $TMPS
809     log_file $TMPS
810     shift 1
811     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
812 }
813
814 ld_o(){
815     eval printf '%s\\n' $LD_O
816 }
817
818 check_ld(){
819     log check_ld "$@"
820     flags=$(filter_out '-l*' "$@")
821     libs=$(filter '-l*' "$@")
822     check_cc $($cflags_filter $flags) || return
823     flags=$($ldflags_filter $flags)
824     libs=$($ldflags_filter $libs)
825     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
826 }
827
828 print_include(){
829     hdr=$1
830     test "${hdr%.h}" = "${hdr}" &&
831         echo "#include $hdr"    ||
832         echo "#include <$hdr>"
833 }
834
835 check_code(){
836     log check_code "$@"
837     check=$1
838     headers=$2
839     code=$3
840     shift 3
841     {
842         for hdr in $headers; do
843             print_include $hdr
844         done
845         echo "int main(void) { $code; return 0; }"
846     } | check_$check "$@"
847 }
848
849 check_cppflags(){
850     log check_cppflags "$@"
851     check_cc "$@" <<EOF && append CPPFLAGS "$@"
852 int x;
853 EOF
854 }
855
856 test_cflags(){
857     log test_cflags "$@"
858     set -- $($cflags_filter "$@")
859     check_cc "$@" <<EOF
860 int x;
861 EOF
862 }
863
864 check_cflags(){
865     log check_cflags "$@"
866     test_cflags "$@" && add_cflags "$@"
867 }
868
869 test_objcflags(){
870     log test_cflags "$@"
871     set -- $($cflags_filter "$@")
872     check_objcc "$@" <<EOF
873 int x;
874 EOF
875 }
876
877 check_objcflags(){
878     log check_cflags "$@"
879     test_objcflags "$@" && add_objcflags "$@"
880 }
881
882 test_ldflags(){
883     log test_ldflags "$@"
884     check_ld "$@" <<EOF
885 int main(void){ return 0; }
886 EOF
887 }
888
889 check_ldflags(){
890     log check_ldflags "$@"
891     test_ldflags "$@" && add_ldflags "$@"
892 }
893
894 test_stripflags(){
895     log test_stripflags "$@"
896     # call check_cc to get a fresh TMPO
897     check_cc <<EOF
898 int main(void) { return 0; }
899 EOF
900     check_cmd $strip $STRIPFLAGS "$@" $TMPO
901 }
902
903 check_stripflags(){
904     log check_stripflags "$@"
905     test_stripflags "$@" && add_stripflags "$@"
906 }
907
908 check_header(){
909     log check_header "$@"
910     header=$1
911     shift
912     disable_safe $header
913     check_cpp "$@" <<EOF && enable_safe $header
914 #include <$header>
915 int x;
916 EOF
917 }
918
919 check_func(){
920     log check_func "$@"
921     func=$1
922     shift
923     disable $func
924     check_ld "$@" <<EOF && enable $func
925 extern int $func();
926 int main(void){ $func(); }
927 EOF
928 }
929
930 check_mathfunc(){
931     log check_mathfunc "$@"
932     func=$1
933     narg=$2
934     shift 2
935     test $narg = 2 && args="f, g" || args="f"
936     disable $func
937     check_ld "$@" <<EOF && enable $func
938 #include <math.h>
939 float foo(float f, float g) { return $func($args); }
940 int main(void){ return 0; }
941 EOF
942 }
943
944 check_func_headers(){
945     log check_func_headers "$@"
946     headers=$1
947     funcs=$2
948     shift 2
949     {
950         for hdr in $headers; do
951             print_include $hdr
952         done
953         for func in $funcs; do
954             echo "long check_$func(void) { return (long) $func; }"
955         done
956         echo "int main(void) { return 0; }"
957     } | check_ld "$@" && enable $funcs && enable_safe $headers
958 }
959
960 check_cpp_condition(){
961     log check_cpp_condition "$@"
962     header=$1
963     condition=$2
964     shift 2
965     check_cpp "$@" <<EOF
966 #include <$header>
967 #if !($condition)
968 #error "unsatisfied condition: $condition"
969 #endif
970 EOF
971 }
972
973 check_lib(){
974     log check_lib "$@"
975     header="$1"
976     func="$2"
977     shift 2
978     check_header $header && check_func $func "$@" && add_extralibs "$@"
979 }
980
981 check_lib2(){
982     log check_lib2 "$@"
983     headers="$1"
984     funcs="$2"
985     shift 2
986     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
987 }
988
989 check_pkg_config(){
990     log check_pkg_config "$@"
991     pkg="$1"
992     headers="$2"
993     funcs="$3"
994     shift 3
995     check_cmd $pkg_config --exists --print-errors $pkg || return
996     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
997     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
998     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
999         set_safe "${pkg}_cflags" $pkg_cflags   &&
1000         set_safe "${pkg}_libs"   $pkg_libs
1001 }
1002
1003 check_exec(){
1004     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1005 }
1006
1007 check_exec_crash(){
1008     code=$(cat)
1009
1010     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1011     # are safe but may not be available everywhere.  Thus we use
1012     # raise(SIGTERM) instead.  The check is run in a subshell so we
1013     # can redirect the "Terminated" message from the shell.  SIGBUS
1014     # is not defined by standard C so it is used conditionally.
1015
1016     (check_exec "$@") >> $logfile 2>&1 <<EOF
1017 #include <signal.h>
1018 static void sighandler(int sig){
1019     raise(SIGTERM);
1020 }
1021 int foo(void){
1022     $code
1023 }
1024 int (*func_ptr)(void) = foo;
1025 int main(void){
1026     signal(SIGILL, sighandler);
1027     signal(SIGFPE, sighandler);
1028     signal(SIGSEGV, sighandler);
1029 #ifdef SIGBUS
1030     signal(SIGBUS, sighandler);
1031 #endif
1032     return func_ptr();
1033 }
1034 EOF
1035 }
1036
1037 check_type(){
1038     log check_type "$@"
1039     headers=$1
1040     type=$2
1041     shift 2
1042     disable_safe "$type"
1043     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1044 }
1045
1046 check_struct(){
1047     log check_struct "$@"
1048     headers=$1
1049     struct=$2
1050     member=$3
1051     shift 3
1052     disable_safe "${struct}_${member}"
1053     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1054         enable_safe "${struct}_${member}"
1055 }
1056
1057 check_builtin(){
1058     log check_builtin "$@"
1059     name=$1
1060     headers=$2
1061     builtin=$3
1062     shift 3
1063     disable "$name"
1064     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1065 }
1066
1067 check_compile_assert(){
1068     log check_compile_assert "$@"
1069     name=$1
1070     headers=$2
1071     condition=$3
1072     shift 3
1073     disable "$name"
1074     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1075 }
1076
1077 require(){
1078     name="$1"
1079     header="$2"
1080     func="$3"
1081     shift 3
1082     check_lib $header $func "$@" || die "ERROR: $name not found"
1083 }
1084
1085 require2(){
1086     name="$1"
1087     headers="$2"
1088     func="$3"
1089     shift 3
1090     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1091 }
1092
1093 require_pkg_config(){
1094     pkg="$1"
1095     check_pkg_config "$@" || die "ERROR: $pkg not found"
1096     add_cflags    $(get_safe "${pkg}_cflags")
1097     add_extralibs $(get_safe "${pkg}_libs")
1098 }
1099
1100 hostcc_e(){
1101     eval printf '%s\\n' $HOSTCC_E
1102 }
1103
1104 hostcc_o(){
1105     eval printf '%s\\n' $HOSTCC_O
1106 }
1107
1108 check_host_cc(){
1109     log check_host_cc "$@"
1110     cat > $TMPC
1111     log_file $TMPC
1112     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1113 }
1114
1115 check_host_cpp(){
1116     log check_host_cpp "$@"
1117     cat > $TMPC
1118     log_file $TMPC
1119     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1120 }
1121
1122 check_host_cppflags(){
1123     log check_host_cppflags "$@"
1124     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1125 int x;
1126 EOF
1127 }
1128
1129 check_host_cflags(){
1130     log check_host_cflags "$@"
1131     set -- $($host_cflags_filter "$@")
1132     check_host_cc "$@" <<EOF && append host_cflags "$@"
1133 int x;
1134 EOF
1135 }
1136
1137 check_host_cpp_condition(){
1138     log check_host_cpp_condition "$@"
1139     header=$1
1140     condition=$2
1141     shift 2
1142     check_host_cpp "$@" <<EOF
1143 #include <$header>
1144 #if !($condition)
1145 #error "unsatisfied condition: $condition"
1146 #endif
1147 EOF
1148 }
1149
1150 apply(){
1151     file=$1
1152     shift
1153     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1154 }
1155
1156 cp_if_changed(){
1157     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1158     mkdir -p "$(dirname $2)"
1159     $cp_f "$1" "$2"
1160 }
1161
1162 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1163 # system-dependent things.
1164
1165 AVCODEC_COMPONENTS="
1166     bsfs
1167     decoders
1168     encoders
1169     hwaccels
1170     parsers
1171 "
1172
1173 AVDEVICE_COMPONENTS="
1174     indevs
1175     outdevs
1176 "
1177 AVFILTER_COMPONENTS="
1178     filters
1179 "
1180 AVFORMAT_COMPONENTS="
1181     demuxers
1182     muxers
1183     protocols
1184 "
1185
1186 AVRESAMPLE_COMPONENTS=""
1187 AVUTIL_COMPONENTS=""
1188
1189 COMPONENT_LIST="
1190     $AVCODEC_COMPONENTS
1191     $AVDEVICE_COMPONENTS
1192     $AVFILTER_COMPONENTS
1193     $AVFORMAT_COMPONENTS
1194     $AVRESAMPLE_COMPONENTS
1195     $AVUTIL_COMPONENTS
1196 "
1197
1198 EXAMPLE_LIST="
1199     avcodec_example
1200     filter_audio_example
1201     metadata_example
1202     output_example
1203     qsvdec_example
1204     transcode_aac_example
1205 "
1206
1207 EXTERNAL_LIBRARY_LIST="
1208     avisynth
1209     bzlib
1210     cuda
1211     frei0r
1212     gnutls
1213     libbs2b
1214     libcdio
1215     libdc1394
1216     libdcadec
1217     libfaac
1218     libfdk_aac
1219     libfontconfig
1220     libfreetype
1221     libgsm
1222     libilbc
1223     libkvazaar
1224     libmfx
1225     libmp3lame
1226     libnpp
1227     libopencore_amrnb
1228     libopencore_amrwb
1229     libopencv
1230     libopenh264
1231     libopenjpeg
1232     libopus
1233     libpulse
1234     librtmp
1235     libschroedinger
1236     libsnappy
1237     libspeex
1238     libtheora
1239     libtwolame
1240     libvo_aacenc
1241     libvo_amrwbenc
1242     libvorbis
1243     libvpx
1244     libwavpack
1245     libwebp
1246     libx264
1247     libx265
1248     libxavs
1249     libxcb
1250     libxcb_shm
1251     libxcb_xfixes
1252     libxvid
1253     mmal
1254     nvenc
1255     openssl
1256     x11grab
1257     zlib
1258 "
1259
1260 FEATURE_LIST="
1261     gray
1262     hardcoded_tables
1263     runtime_cpudetect
1264     safe_bitstream_reader
1265     shared
1266     small
1267     sram
1268     static
1269     swscale_alpha
1270 "
1271
1272 HWACCEL_LIST="
1273     d3d11va
1274     dxva2
1275     vaapi
1276     vda
1277     vdpau
1278 "
1279
1280 LIBRARY_LIST="
1281     avcodec
1282     avdevice
1283     avfilter
1284     avformat
1285     avresample
1286     avutil
1287     swscale
1288 "
1289
1290 LICENSE_LIST="
1291     gpl
1292     nonfree
1293     version3
1294 "
1295
1296 PROGRAM_LIST="
1297     avconv
1298     avplay
1299     avprobe
1300 "
1301
1302 SUBSYSTEM_LIST="
1303     dct
1304     doc
1305     error_resilience
1306     faan
1307     fft
1308     lsp
1309     lzo
1310     mdct
1311     network
1312     rdft
1313 "
1314
1315 CONFIG_LIST="
1316     $COMPONENT_LIST
1317     $EXAMPLE_LIST
1318     $EXTERNAL_LIBRARY_LIST
1319     $FEATURE_LIST
1320     $HWACCEL_LIST
1321     $LICENSE_LIST
1322     $LIBRARY_LIST
1323     $PROGRAM_LIST
1324     $SUBSYSTEM_LIST
1325     memalign_hack
1326     neon_clobber_test
1327     pic
1328     pod2man
1329     texi2html
1330     thumb
1331     valgrind_backtrace
1332     xmm_clobber_test
1333 "
1334
1335 THREADS_LIST="
1336     pthreads
1337     w32threads
1338 "
1339
1340 ATOMICS_LIST="
1341     atomics_gcc
1342     atomics_suncc
1343     atomics_win32
1344 "
1345
1346 ARCH_LIST="
1347     aarch64
1348     alpha
1349     arm
1350     avr32
1351     avr32_ap
1352     avr32_uc
1353     bfin
1354     ia64
1355     m68k
1356     mips
1357     mips64
1358     parisc
1359     ppc
1360     ppc64
1361     s390
1362     sh4
1363     sparc
1364     sparc64
1365     tilegx
1366     tilepro
1367     tomi
1368     x86
1369     x86_32
1370     x86_64
1371 "
1372
1373 ARCH_EXT_LIST_ARM="
1374     armv5te
1375     armv6
1376     armv6t2
1377     armv8
1378     neon
1379     vfp
1380     vfpv3
1381 "
1382
1383 ARCH_EXT_LIST_X86_SIMD="
1384     amd3dnow
1385     amd3dnowext
1386     avx
1387     avx2
1388     fma3
1389     fma4
1390     mmx
1391     mmxext
1392     sse
1393     sse2
1394     sse3
1395     sse4
1396     sse42
1397     ssse3
1398     xop
1399 "
1400
1401 ARCH_EXT_LIST_PPC="
1402     altivec
1403     dcbzl
1404     ldbrx
1405     power8
1406     ppc4xx
1407     vsx
1408 "
1409
1410 ARCH_EXT_LIST_X86="
1411     $ARCH_EXT_LIST_X86_SIMD
1412     cpunop
1413     i686
1414 "
1415
1416 ARCH_EXT_LIST_MIPS="
1417     loongson
1418     mips32r1
1419     mips64r1
1420     mips32r2
1421     mips64r2
1422     mips32r6
1423     mips64r6
1424 "
1425
1426 ARCH_EXT_LIST="
1427     $ARCH_EXT_LIST_ARM
1428     $ARCH_EXT_LIST_MIPS
1429     $ARCH_EXT_LIST_PPC
1430     $ARCH_EXT_LIST_X86
1431     vis
1432 "
1433
1434 ARCH_FEATURES="
1435     aligned_stack
1436     fast_64bit
1437     fast_clz
1438     fast_cmov
1439     local_aligned_8
1440     local_aligned_16
1441     simd_align_16
1442 "
1443
1444 BUILTIN_LIST="
1445     atomic_cas_ptr
1446     machine_rw_barrier
1447     MemoryBarrier
1448     mm_empty
1449     rdtsc
1450     sync_val_compare_and_swap
1451 "
1452 HAVE_LIST_CMDLINE="
1453     inline_asm
1454     symver
1455     yasm
1456 "
1457
1458 HAVE_LIST_PUB="
1459     bigendian
1460     fast_unaligned
1461 "
1462
1463 HEADERS_LIST="
1464     AVFoundation_AVFoundation_h
1465     alsa_asoundlib_h
1466     altivec_h
1467     arpa_inet_h
1468     cdio_paranoia_h
1469     cdio_paranoia_paranoia_h
1470     dev_bktr_ioctl_bt848_h
1471     dev_bktr_ioctl_meteor_h
1472     dev_ic_bt8xx_h
1473     dev_video_bktr_ioctl_bt848_h
1474     dev_video_meteor_ioctl_meteor_h
1475     direct_h
1476     dlfcn_h
1477     d3d11_h
1478     dxva_h
1479     gsm_h
1480     io_h
1481     mach_mach_time_h
1482     machine_ioctl_bt848_h
1483     machine_ioctl_meteor_h
1484     malloc_h
1485     poll_h
1486     sndio_h
1487     soundcard_h
1488     sys_mman_h
1489     sys_param_h
1490     sys_resource_h
1491     sys_select_h
1492     sys_soundcard_h
1493     sys_time_h
1494     sys_un_h
1495     sys_videoio_h
1496     unistd_h
1497     valgrind_valgrind_h
1498     windows_h
1499     winsock2_h
1500 "
1501
1502 INTRINSICS_LIST="
1503     intrinsics_neon
1504 "
1505
1506 MATH_FUNCS="
1507     atanf
1508     atan2f
1509     cbrtf
1510     cosf
1511     exp2
1512     exp2f
1513     expf
1514     isinf
1515     isnan
1516     ldexpf
1517     llrint
1518     llrintf
1519     log2
1520     log2f
1521     log10f
1522     lrint
1523     lrintf
1524     powf
1525     rint
1526     round
1527     roundf
1528     sinf
1529     trunc
1530     truncf
1531 "
1532
1533 SYSTEM_FUNCS="
1534     aligned_malloc
1535     clock_gettime
1536     closesocket
1537     CommandLineToArgvW
1538     CoTaskMemFree
1539     CryptGenRandom
1540     dlopen
1541     fcntl
1542     flt_lim
1543     fork
1544     getaddrinfo
1545     gethrtime
1546     getopt
1547     GetProcessAffinityMask
1548     GetProcessMemoryInfo
1549     GetProcessTimes
1550     getrusage
1551     GetSystemTimeAsFileTime
1552     gettimeofday
1553     gmtime_r
1554     inet_aton
1555     isatty
1556     jack_port_get_latency_range
1557     LoadLibrary
1558     localtime_r
1559     mach_absolute_time
1560     MapViewOfFile
1561     memalign
1562     mkstemp
1563     mmap
1564     mprotect
1565     nanosleep
1566     posix_memalign
1567     sched_getaffinity
1568     SetConsoleTextAttribute
1569     setmode
1570     setrlimit
1571     Sleep
1572     strerror_r
1573     sysconf
1574     sysctl
1575     usleep
1576     VirtualAlloc
1577 "
1578
1579 TOOLCHAIN_FEATURES="
1580     as_dn_directive
1581     as_func
1582     as_object_arch
1583     asm_mod_q
1584     attribute_may_alias
1585     attribute_packed
1586     ebp_available
1587     ebx_available
1588     gnu_as
1589     ibm_asm
1590     inline_asm_labels
1591     pragma_deprecated
1592     symver_asm_label
1593     symver_gnu_asm
1594     vfp_args
1595     xform_asm
1596     xmm_clobbers
1597 "
1598
1599 TYPES_LIST="
1600     CONDITION_VARIABLE_Ptr
1601     socklen_t
1602     struct_addrinfo
1603     struct_group_source_req
1604     struct_ip_mreq_source
1605     struct_ipv6_mreq
1606     struct_pollfd
1607     struct_rusage_ru_maxrss
1608     struct_sockaddr_in6
1609     struct_sockaddr_sa_len
1610     struct_sockaddr_storage
1611     struct_v4l2_frmivalenum_discrete
1612 "
1613
1614 HAVE_LIST="
1615     $ARCH_EXT_LIST
1616     $(add_suffix _external $ARCH_EXT_LIST)
1617     $(add_suffix _inline   $ARCH_EXT_LIST)
1618     $ARCH_FEATURES
1619     $ATOMICS_LIST
1620     $BUILTIN_LIST
1621     $HAVE_LIST_CMDLINE
1622     $HAVE_LIST_PUB
1623     $HEADERS_LIST
1624     $INTRINSICS_LIST
1625     $MATH_FUNCS
1626     $SYSTEM_FUNCS
1627     $THREADS_LIST
1628     $TOOLCHAIN_FEATURES
1629     $TYPES_LIST
1630     atomics_native
1631     dos_paths
1632     dxva2_lib
1633     libc_msvcrt
1634     libdc1394_1
1635     libdc1394_2
1636     sdl
1637     section_data_rel_ro
1638     threads
1639     vaapi_drm
1640     vaapi_x11
1641     vdpau_x11
1642     xlib
1643 "
1644
1645 # options emitted with CONFIG_ prefix but not available on the command line
1646 CONFIG_EXTRA="
1647     aandcttables
1648     ac3dsp
1649     audio_frame_queue
1650     audiodsp
1651     blockdsp
1652     bswapdsp
1653     cabac
1654     dirac_parse
1655     dvprofile
1656     faandct
1657     faanidct
1658     fdctdsp
1659     flacdsp
1660     fmtconvert
1661     g722dsp
1662     gcrypt
1663     gmp
1664     golomb
1665     gplv3
1666     h263dsp
1667     h264chroma
1668     h264dsp
1669     h264pred
1670     h264qpel
1671     hpeldsp
1672     huffman
1673     huffyuvdsp
1674     huffyuvencdsp
1675     idctdsp
1676     iirfilter
1677     imdct15
1678     intrax8
1679     iso_media
1680     ividsp
1681     jpegtables
1682     libx262
1683     lgplv3
1684     lpc
1685     lzf
1686     me_cmp
1687     mpeg_er
1688     mpegaudio
1689     mpegaudiodsp
1690     mpegvideo
1691     mpegvideoenc
1692     mss34dsp
1693     pixblockdsp
1694     qpeldsp
1695     qsv
1696     qsvdec
1697     qsvenc
1698     rangecoder
1699     riffdec
1700     riffenc
1701     rtpdec
1702     rtpenc_chain
1703     rv34dsp
1704     sinewin
1705     snappy
1706     srtp
1707     startcode
1708     texturedsp
1709     texturedspenc
1710     tpeldsp
1711     vc1dsp
1712     videodsp
1713     vp3dsp
1714     vp56dsp
1715     vp8dsp
1716     wma_freqs
1717     wmv2dsp
1718 "
1719
1720 CMDLINE_SELECT="
1721     $ARCH_EXT_LIST
1722     $CONFIG_LIST
1723     $HAVE_LIST_CMDLINE
1724     $THREADS_LIST
1725     asm
1726     cross_compile
1727     debug
1728     extra_warnings
1729     logging
1730     lto
1731     optimizations
1732     rpath
1733 "
1734
1735 PATHS_LIST="
1736     bindir
1737     datadir
1738     docdir
1739     incdir
1740     libdir
1741     mandir
1742     prefix
1743     shlibdir
1744 "
1745
1746 CMDLINE_SET="
1747     $PATHS_LIST
1748     ar
1749     arch
1750     as
1751     build_suffix
1752     cc
1753     objcc
1754     cpu
1755     cross_prefix
1756     custom_allocator
1757     dep_cc
1758     env
1759     extra_version
1760     host_cc
1761     host_cflags
1762     host_ld
1763     host_ldflags
1764     host_libs
1765     host_os
1766     ld
1767     logfile
1768     malloc_prefix
1769     nm
1770     optflags
1771     pkg_config
1772     pkg_config_flags
1773     random_seed
1774     samples
1775     sysinclude
1776     sysroot
1777     target_exec
1778     target_os
1779     target_path
1780     target_samples
1781     toolchain
1782 "
1783
1784 CMDLINE_APPEND="
1785     extra_cflags
1786     extra_objcflags
1787     host_cppflags
1788 "
1789
1790 # code dependency declarations
1791
1792 # architecture extensions
1793
1794 armv5te_deps="arm"
1795 armv6_deps="arm"
1796 armv6t2_deps="arm"
1797 armv8_deps="aarch64"
1798 neon_deps_any="aarch64 arm"
1799 intrinsics_neon_deps="neon"
1800 vfp_deps_any="aarch64 arm"
1801 vfpv3_deps="vfp"
1802
1803 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1804
1805 altivec_deps="ppc"
1806 ppc4xx_deps="ppc"
1807 vsx_deps="altivec"
1808 power8_deps="vsx"
1809
1810 cpunop_deps="i686"
1811 x86_64_select="i686"
1812 x86_64_suggest="fast_cmov"
1813
1814 amd3dnow_deps="mmx"
1815 amd3dnowext_deps="amd3dnow"
1816 i686_deps="x86"
1817 mmx_deps="x86"
1818 mmxext_deps="mmx"
1819 sse_deps="mmxext"
1820 sse2_deps="sse"
1821 sse3_deps="sse2"
1822 ssse3_deps="sse3"
1823 sse4_deps="ssse3"
1824 sse42_deps="sse4"
1825 avx_deps="sse42"
1826 xop_deps="avx"
1827 fma3_deps="avx"
1828 fma4_deps="avx"
1829 avx2_deps="avx"
1830
1831 mmx_external_deps="yasm"
1832 mmx_inline_deps="inline_asm"
1833 mmx_suggest="mmx_external mmx_inline"
1834
1835 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1836     eval dep=\$${ext}_deps
1837     eval ${ext}_external_deps='"${dep}_external"'
1838     eval ${ext}_inline_deps='"${dep}_inline"'
1839     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1840 done
1841
1842 aligned_stack_if_any="aarch64 ppc x86"
1843 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1844 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1845 fast_unaligned_if_any="aarch64 ppc x86"
1846 simd_align_16_if_any="altivec neon sse"
1847
1848 # system capabilities
1849 symver_if_any="symver_asm_label symver_gnu_asm"
1850 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1851
1852 # threading support
1853 atomics_gcc_if="sync_val_compare_and_swap"
1854 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1855 atomics_win32_if="MemoryBarrier"
1856 atomics_native_if_any="$ATOMICS_LIST"
1857 w32threads_deps="atomics_native"
1858 threads_if_any="$THREADS_LIST"
1859
1860 # subsystems
1861 dct_select="rdft"
1862 dirac_parse_select="golomb"
1863 error_resilience_select="me_cmp"
1864 faandct_deps="faan fdctdsp"
1865 faanidct_deps="faan idctdsp"
1866 h264dsp_select="startcode"
1867 intrax8_select="blockdsp idctdsp"
1868 mdct_select="fft"
1869 rdft_select="fft"
1870 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1871 mpeg_er_select="error_resilience"
1872 mpegaudio_select="mpegaudiodsp"
1873 mpegaudiodsp_select="dct"
1874 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1875 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1876 nvenc_deps_any="dlopen LoadLibrary"
1877 nvenc_extralibs='$ldl'
1878 qsvdec_select="qsv"
1879 qsvenc_select="qsv"
1880 vc1dsp_select="h264chroma qpeldsp startcode"
1881
1882 # decoders / encoders
1883 aac_decoder_select="imdct15 mdct sinewin"
1884 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1885 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1886 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1887 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1888 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1889 adpcm_g722_decoder_select="g722dsp"
1890 adpcm_g722_encoder_select="g722dsp"
1891 aic_decoder_select="golomb idctdsp"
1892 alac_encoder_select="lpc"
1893 als_decoder_select="bswapdsp"
1894 amrnb_decoder_select="lsp"
1895 amrwb_decoder_select="lsp"
1896 amv_decoder_select="sp5x_decoder"
1897 ape_decoder_select="bswapdsp"
1898 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1899 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1900 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1901 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1902 atrac1_decoder_select="mdct sinewin"
1903 atrac3_decoder_select="mdct"
1904 atrac3p_decoder_select="mdct sinewin"
1905 bink_decoder_select="blockdsp hpeldsp"
1906 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1907 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1908 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1909 cllc_decoder_select="bswapdsp"
1910 comfortnoise_encoder_select="lpc"
1911 cook_decoder_select="audiodsp mdct sinewin"
1912 cscd_decoder_select="lzo"
1913 cscd_decoder_suggest="zlib"
1914 dca_decoder_select="fmtconvert mdct"
1915 dds_decoder_select="texturedsp"
1916 dnxhd_decoder_select="blockdsp idctdsp"
1917 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1918 dvvideo_decoder_select="dvprofile idctdsp"
1919 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1920 dxa_decoder_deps="zlib"
1921 dxv_decoder_select="lzf texturedsp"
1922 eac3_decoder_select="ac3_decoder"
1923 eac3_encoder_select="ac3_encoder"
1924 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1925 eatgq_decoder_select="aandcttables idctdsp"
1926 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1927 exr_decoder_deps="zlib"
1928 ffv1_decoder_select="golomb rangecoder"
1929 ffv1_encoder_select="rangecoder"
1930 ffvhuff_decoder_select="huffyuv_decoder"
1931 ffvhuff_encoder_select="huffyuv_encoder"
1932 fic_decoder_select="golomb"
1933 flac_decoder_select="flacdsp golomb"
1934 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1935 flashsv_decoder_deps="zlib"
1936 flashsv_encoder_deps="zlib"
1937 flashsv2_decoder_deps="zlib"
1938 flv_decoder_select="h263_decoder"
1939 flv_encoder_select="h263_encoder"
1940 fourxm_decoder_select="blockdsp bswapdsp"
1941 fraps_decoder_select="bswapdsp huffman"
1942 g2m_decoder_deps="zlib"
1943 g2m_decoder_select="blockdsp idctdsp jpegtables"
1944 h261_decoder_select="mpeg_er mpegvideo"
1945 h261_encoder_select="aandcttables mpegvideoenc"
1946 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1947 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1948 h263i_decoder_select="h263_decoder"
1949 h263p_encoder_select="h263_encoder"
1950 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
1951 h264_decoder_suggest="error_resilience"
1952 h264_nvenc_encoder_deps="nvenc"
1953 h264_qsv_decoder_deps="libmfx"
1954 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1955 h264_qsv_encoder_deps="libmfx"
1956 h264_qsv_encoder_select="qsvenc"
1957 hap_decoder_select="snappy texturedsp"
1958 hap_encoder_deps="libsnappy"
1959 hap_encoder_select="texturedspenc"
1960 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1961 hevc_nvenc_encoder_deps="nvenc"
1962 hevc_qsv_encoder_deps="libmfx"
1963 hevc_qsv_decoder_deps="libmfx"
1964 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1965 hevc_qsv_encoder_select="qsvenc"
1966 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1967 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1968 iac_decoder_select="imc_decoder"
1969 imc_decoder_select="bswapdsp fft mdct sinewin"
1970 indeo3_decoder_select="hpeldsp"
1971 indeo4_decoder_select="ividsp"
1972 indeo5_decoder_select="ividsp"
1973 interplay_video_decoder_select="hpeldsp"
1974 jpegls_decoder_select="golomb mjpeg_decoder"
1975 jpegls_encoder_select="golomb"
1976 jv_decoder_select="blockdsp"
1977 lagarith_decoder_select="huffyuvdsp"
1978 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1979 loco_decoder_select="golomb"
1980 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1981 metasound_decoder_select="lsp mdct sinewin"
1982 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1983 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1984 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1985 mjpegb_decoder_select="mjpeg_decoder"
1986 mlp_decoder_select="mlp_parser"
1987 motionpixels_decoder_select="bswapdsp"
1988 mp1_decoder_select="mpegaudio"
1989 mp1float_decoder_select="mpegaudio"
1990 mp2_decoder_select="mpegaudio"
1991 mp2float_decoder_select="mpegaudio"
1992 mp3_decoder_select="mpegaudio"
1993 mp3adu_decoder_select="mpegaudio"
1994 mp3adufloat_decoder_select="mpegaudio"
1995 mp3float_decoder_select="mpegaudio"
1996 mp3on4_decoder_select="mpegaudio"
1997 mp3on4float_decoder_select="mpegaudio"
1998 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1999 mpc8_decoder_select="mpegaudiodsp"
2000 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2001 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2002 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2003 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2004 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2005 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2006 mpeg2_qsv_decoder_deps="libmfx"
2007 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2008 mpeg2_qsv_encoder_deps="libmfx"
2009 mpeg2_qsv_encoder_select="qsvenc"
2010 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2011 mpeg4_encoder_select="h263_encoder"
2012 msa1_decoder_select="mss34dsp"
2013 msmpeg4v1_decoder_select="h263_decoder"
2014 msmpeg4v2_decoder_select="h263_decoder"
2015 msmpeg4v2_encoder_select="h263_encoder"
2016 msmpeg4v3_decoder_select="h263_decoder"
2017 msmpeg4v3_encoder_select="h263_encoder"
2018 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2019 mts2_decoder_select="mss34dsp"
2020 mxpeg_decoder_select="mjpeg_decoder"
2021 nellymoser_decoder_select="mdct sinewin"
2022 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2023 nuv_decoder_select="idctdsp lzo"
2024 nvenc_h264_encoder_deps="nvenc"
2025 nvenc_hevc_encoder_deps="nvenc"
2026 on2avc_decoder_select="mdct"
2027 opus_decoder_deps="avresample"
2028 opus_decoder_select="imdct15"
2029 png_decoder_deps="zlib"
2030 png_encoder_deps="zlib"
2031 png_encoder_select="huffyuvencdsp"
2032 prores_decoder_select="idctdsp"
2033 prores_encoder_select="fdctdsp"
2034 qcelp_decoder_select="lsp"
2035 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2036 ra_144_encoder_select="audio_frame_queue lpc"
2037 ralf_decoder_select="golomb"
2038 rscc_decoder_deps="zlib"
2039 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2040 rv10_encoder_select="h263_encoder"
2041 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2042 rv20_encoder_select="h263_encoder"
2043 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2044 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2045 screenpresso_decoder_deps="zlib"
2046 shorten_decoder_select="golomb"
2047 sipr_decoder_select="lsp"
2048 sp5x_decoder_select="mjpeg_decoder"
2049 svq1_decoder_select="hpeldsp"
2050 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2051 svq3_decoder_select="golomb h264dsp h264pred hpeldsp tpeldsp videodsp"
2052 svq3_decoder_suggest="zlib"
2053 tak_decoder_select="audiodsp"
2054 tdsc_decoder_deps="zlib"
2055 tdsc_decoder_select="mjpeg_decoder"
2056 theora_decoder_select="vp3_decoder"
2057 thp_decoder_select="mjpeg_decoder"
2058 tiff_decoder_suggest="zlib"
2059 tiff_encoder_suggest="zlib"
2060 truehd_decoder_select="mlp_decoder"
2061 truemotion2_decoder_select="bswapdsp"
2062 truespeech_decoder_select="bswapdsp"
2063 tscc_decoder_deps="zlib"
2064 txd_decoder_select="texturedsp"
2065 twinvq_decoder_select="mdct lsp sinewin"
2066 utvideo_decoder_select="bswapdsp"
2067 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2068 vble_decoder_select="huffyuvdsp"
2069 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2070 vc1image_decoder_select="vc1_decoder"
2071 vorbis_decoder_select="mdct"
2072 vorbis_encoder_select="mdct"
2073 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2074 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2075 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2076 vp6a_decoder_select="vp6_decoder"
2077 vp6f_decoder_select="vp6_decoder"
2078 vp7_decoder_select="h264pred videodsp vp8dsp"
2079 vp8_decoder_select="h264pred videodsp vp8dsp"
2080 vp9_decoder_select="videodsp"
2081 webp_decoder_select="vp8_decoder"
2082 wmapro_decoder_select="mdct sinewin wma_freqs"
2083 wmav1_decoder_select="mdct sinewin wma_freqs"
2084 wmav1_encoder_select="mdct sinewin wma_freqs"
2085 wmav2_decoder_select="mdct sinewin wma_freqs"
2086 wmav2_encoder_select="mdct sinewin wma_freqs"
2087 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2088 wmv1_decoder_select="h263_decoder"
2089 wmv1_encoder_select="h263_encoder"
2090 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2091 wmv2_encoder_select="h263_encoder wmv2dsp"
2092 wmv3_decoder_select="vc1_decoder"
2093 wmv3image_decoder_select="wmv3_decoder"
2094 zerocodec_decoder_deps="zlib"
2095 zlib_decoder_deps="zlib"
2096 zlib_encoder_deps="zlib"
2097 zmbv_decoder_deps="zlib"
2098 zmbv_encoder_deps="zlib"
2099
2100 # hardware accelerators
2101 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2102 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2103 vaapi_deps="va_va_h"
2104 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2105 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2106 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2107
2108 h263_vaapi_hwaccel_deps="vaapi"
2109 h263_vaapi_hwaccel_select="h263_decoder"
2110 h264_d3d11va_hwaccel_deps="d3d11va"
2111 h264_d3d11va_hwaccel_select="h264_decoder"
2112 h264_dxva2_hwaccel_deps="dxva2"
2113 h264_dxva2_hwaccel_select="h264_decoder"
2114 h264_mmal_decoder_deps="mmal"
2115 h264_mmal_hwaccel_deps="mmal"
2116 h264_mmal_decoder_select="h264_decoder"
2117 h264_mmal_encoder_deps="mmal"
2118 h264_qsv_hwaccel_deps="libmfx"
2119 h264_vaapi_hwaccel_deps="vaapi"
2120 h264_vaapi_hwaccel_select="h264_decoder"
2121 h264_vda_hwaccel_deps="vda"
2122 h264_vda_hwaccel_select="h264_decoder"
2123 h264_vda_old_hwaccel_deps="vda"
2124 h264_vda_old_hwaccel_select="h264_decoder"
2125 h264_vdpau_hwaccel_deps="vdpau"
2126 h264_vdpau_hwaccel_select="h264_decoder"
2127 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2128 hevc_d3d11va_hwaccel_select="hevc_decoder"
2129 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2130 hevc_dxva2_hwaccel_select="hevc_decoder"
2131 hevc_qsv_hwaccel_deps="libmfx"
2132 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2133 hevc_vdpau_hwaccel_select="hevc_decoder"
2134 mpeg1_vdpau_hwaccel_deps="vdpau"
2135 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2136 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2137 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2138 mpeg2_dxva2_hwaccel_deps="dxva2"
2139 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2140 mpeg2_qsv_hwaccel_deps="libmfx"
2141 mpeg2_vaapi_hwaccel_deps="vaapi"
2142 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2143 mpeg2_vdpau_hwaccel_deps="vdpau"
2144 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2145 mpeg4_vaapi_hwaccel_deps="vaapi"
2146 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2147 mpeg4_vdpau_hwaccel_deps="vdpau"
2148 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2149 vc1_d3d11va_hwaccel_deps="d3d11va"
2150 vc1_d3d11va_hwaccel_select="vc1_decoder"
2151 vc1_dxva2_hwaccel_deps="dxva2"
2152 vc1_dxva2_hwaccel_select="vc1_decoder"
2153 vc1_vaapi_hwaccel_deps="vaapi"
2154 vc1_vaapi_hwaccel_select="vc1_decoder"
2155 vc1_vdpau_hwaccel_deps="vdpau"
2156 vc1_vdpau_hwaccel_select="vc1_decoder"
2157 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2158 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2159 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2160 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2161
2162 # parsers
2163 h264_parser_select="h264_decoder"
2164 hevc_parser_select="golomb"
2165 mpegvideo_parser_select="mpegvideo"
2166 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2167 vc1_parser_select="vc1dsp"
2168
2169 # bitstream_filters
2170 mjpeg2jpeg_bsf_select="jpegtables"
2171
2172 # external libraries
2173 libdcadec_decoder_deps="libdcadec"
2174 libfaac_encoder_deps="libfaac"
2175 libfaac_encoder_select="audio_frame_queue"
2176 libfdk_aac_decoder_deps="libfdk_aac"
2177 libfdk_aac_encoder_deps="libfdk_aac"
2178 libfdk_aac_encoder_select="audio_frame_queue"
2179 libgsm_decoder_deps="libgsm"
2180 libgsm_encoder_deps="libgsm"
2181 libgsm_ms_decoder_deps="libgsm"
2182 libgsm_ms_encoder_deps="libgsm"
2183 libilbc_decoder_deps="libilbc"
2184 libilbc_encoder_deps="libilbc"
2185 libkvazaar_encoder_deps="libkvazaar"
2186 libmp3lame_encoder_deps="libmp3lame"
2187 libmp3lame_encoder_select="audio_frame_queue"
2188 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2189 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2190 libopencore_amrnb_encoder_select="audio_frame_queue"
2191 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2192 libopenh264_encoder_deps="libopenh264"
2193 libopenjpeg_decoder_deps="libopenjpeg"
2194 libopenjpeg_encoder_deps="libopenjpeg"
2195 libopus_decoder_deps="libopus"
2196 libopus_encoder_deps="libopus"
2197 libopus_encoder_select="audio_frame_queue"
2198 libschroedinger_decoder_deps="libschroedinger"
2199 libschroedinger_encoder_deps="libschroedinger"
2200 libspeex_decoder_deps="libspeex"
2201 libspeex_encoder_deps="libspeex"
2202 libspeex_encoder_select="audio_frame_queue"
2203 libtheora_encoder_deps="libtheora"
2204 libtwolame_encoder_deps="libtwolame"
2205 libvo_aacenc_encoder_deps="libvo_aacenc"
2206 libvo_aacenc_encoder_select="audio_frame_queue"
2207 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2208 libvorbis_encoder_deps="libvorbis"
2209 libvorbis_encoder_select="audio_frame_queue"
2210 libvpx_vp8_decoder_deps="libvpx"
2211 libvpx_vp8_encoder_deps="libvpx"
2212 libvpx_vp9_decoder_deps="libvpx"
2213 libvpx_vp9_encoder_deps="libvpx"
2214 libwavpack_encoder_deps="libwavpack"
2215 libwebp_encoder_deps="libwebp"
2216 libx262_encoder_deps="libx262"
2217 libx264_encoder_deps="libx264"
2218 libx265_encoder_deps="libx265"
2219 libxavs_encoder_deps="libxavs"
2220 libxvid_encoder_deps="libxvid"
2221
2222 # demuxers / muxers
2223 ac3_demuxer_select="ac3_parser"
2224 asf_demuxer_select="riffdec"
2225 asf_muxer_select="riffenc"
2226 asf_stream_muxer_select="asf_muxer"
2227 avi_demuxer_select="iso_media riffdec"
2228 avi_muxer_select="riffenc"
2229 avisynth_demuxer_deps="avisynth"
2230 avisynth_demuxer_select="riffdec"
2231 caf_demuxer_select="iso_media riffdec"
2232 dash_muxer_select="mp4_muxer"
2233 dirac_demuxer_select="dirac_parser"
2234 dv_demuxer_select="dvprofile"
2235 dv_muxer_select="dvprofile"
2236 dxa_demuxer_select="riffdec"
2237 eac3_demuxer_select="ac3_parser"
2238 f4v_muxer_select="mov_muxer"
2239 flac_demuxer_select="flac_parser"
2240 hds_muxer_select="flv_muxer"
2241 hls_muxer_select="mpegts_muxer"
2242 ipod_muxer_select="mov_muxer"
2243 ismv_muxer_select="mov_muxer"
2244 matroska_audio_muxer_select="matroska_muxer"
2245 matroska_demuxer_select="iso_media riffdec"
2246 matroska_demuxer_suggest="bzlib lzo zlib"
2247 matroska_muxer_select="iso_media riffenc"
2248 mmf_muxer_select="riffenc"
2249 mov_demuxer_select="iso_media riffdec"
2250 mov_demuxer_suggest="zlib"
2251 mov_muxer_select="iso_media riffenc rtpenc_chain"
2252 mp3_demuxer_select="mpegaudio_parser"
2253 mp4_muxer_select="mov_muxer"
2254 mpegts_demuxer_select="iso_media"
2255 mpegts_muxer_select="adts_muxer latm_muxer"
2256 mpegtsraw_demuxer_select="mpegts_demuxer"
2257 mxf_d10_muxer_select="mxf_muxer"
2258 nut_muxer_select="riffenc"
2259 nuv_demuxer_select="riffdec"
2260 oga_muxer_select="ogg_muxer"
2261 ogg_demuxer_select="dirac_parse"
2262 opus_muxer_select="ogg_muxer"
2263 psp_muxer_select="mov_muxer"
2264 rtp_demuxer_select="sdp_demuxer"
2265 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2266 rtsp_demuxer_select="http_protocol rtpdec"
2267 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2268 sap_demuxer_select="sdp_demuxer"
2269 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2270 sdp_demuxer_select="rtpdec"
2271 smoothstreaming_muxer_select="ismv_muxer"
2272 spdif_muxer_select="aac_parser"
2273 spx_muxer_select="ogg_muxer"
2274 swf_demuxer_suggest="zlib"
2275 tak_demuxer_select="tak_parser"
2276 tg2_muxer_select="mov_muxer"
2277 tgp_muxer_select="mov_muxer"
2278 w64_demuxer_select="wav_demuxer"
2279 wav_demuxer_select="riffdec"
2280 wav_muxer_select="riffenc"
2281 webm_muxer_select="iso_media riffenc"
2282 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2283 wtv_demuxer_select="mpegts_demuxer riffdec"
2284 xmv_demuxer_select="riffdec"
2285 xwma_demuxer_select="riffdec"
2286
2287 # indevs / outdevs
2288 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2289 alsa_outdev_deps="alsa_asoundlib_h"
2290 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2291 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2292 dv1394_indev_deps="dv1394"
2293 dv1394_indev_select="dv_demuxer"
2294 fbdev_indev_deps="linux_fb_h"
2295 jack_indev_deps="jack_jack_h pthreads"
2296 libcdio_indev_deps="libcdio"
2297 libdc1394_indev_deps="libdc1394"
2298 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2299 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2300 pulse_indev_deps="libpulse"
2301 sndio_indev_deps="sndio_h"
2302 sndio_outdev_deps="sndio_h"
2303 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2304 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2305 vfwcap_indev_extralibs="-lavicap32"
2306 x11grab_indev_deps="x11grab"
2307 x11grab_xcb_indev_deps="libxcb"
2308
2309 # protocols
2310 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2311 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2312 ffrtmpcrypt_protocol_select="tcp_protocol"
2313 ffrtmphttp_protocol_deps="!librtmp_protocol"
2314 ffrtmphttp_protocol_select="http_protocol"
2315 gopher_protocol_select="network"
2316 http_protocol_select="tcp_protocol"
2317 httpproxy_protocol_select="tcp_protocol"
2318 https_protocol_select="tls_protocol"
2319 icecast_protocol_select="http_protocol"
2320 librtmp_protocol_deps="librtmp"
2321 librtmpe_protocol_deps="librtmp"
2322 librtmps_protocol_deps="librtmp"
2323 librtmpt_protocol_deps="librtmp"
2324 librtmpte_protocol_deps="librtmp"
2325 mmsh_protocol_select="http_protocol"
2326 mmst_protocol_select="network"
2327 rtmp_protocol_deps="!librtmp_protocol"
2328 rtmp_protocol_select="tcp_protocol"
2329 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2330 rtmps_protocol_deps="!librtmp_protocol"
2331 rtmps_protocol_select="tls_protocol"
2332 rtmpt_protocol_select="ffrtmphttp_protocol"
2333 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2334 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2335 rtp_protocol_select="udp_protocol"
2336 sctp_protocol_deps="struct_sctp_event_subscribe"
2337 sctp_protocol_select="network"
2338 srtp_protocol_select="rtp_protocol srtp"
2339 tcp_protocol_select="network"
2340 tls_gnutls_protocol_deps="gnutls"
2341 tls_gnutls_protocol_select="tcp_protocol"
2342 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2343 tls_openssl_protocol_select="tcp_protocol"
2344 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2345 udp_protocol_select="network"
2346 unix_protocol_deps="sys_un_h"
2347 unix_protocol_select="network"
2348
2349 # filters
2350 blackframe_filter_deps="gpl"
2351 boxblur_filter_deps="gpl"
2352 bs2b_filter_deps="libbs2b"
2353 cropdetect_filter_deps="gpl"
2354 delogo_filter_deps="gpl"
2355 drawtext_filter_deps="libfreetype"
2356 frei0r_filter_deps="frei0r dlopen"
2357 frei0r_filter_extralibs='$ldl'
2358 frei0r_src_filter_deps="frei0r dlopen"
2359 frei0r_src_filter_extralibs='$ldl'
2360 hqdn3d_filter_deps="gpl"
2361 hwupload_cuda_filter_deps="cuda"
2362 interlace_filter_deps="gpl"
2363 ocv_filter_deps="libopencv"
2364 resample_filter_deps="avresample"
2365 scale_filter_deps="swscale"
2366 scale_npp_filter_deps="cuda libnpp"
2367 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2368
2369 # examples
2370 avcodec_example_deps="avcodec avutil"
2371 filter_audio_example_deps="avfilter avutil"
2372 metadata_example_deps="avformat avutil"
2373 output_example_deps="avcodec avformat avutil swscale"
2374 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2375 transcode_aac_example_deps="avcodec avformat avresample"
2376
2377 # libraries, in linking order
2378 avcodec_deps="avutil"
2379 avdevice_deps="avformat avcodec avutil"
2380 avfilter_deps="avutil"
2381 avformat_deps="avcodec avutil"
2382 avresample_deps="avutil"
2383 swscale_deps="avutil"
2384
2385 # programs
2386 avconv_deps="avcodec avfilter avformat avresample swscale"
2387 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2388                fps_filter null_filter resample_filter scale_filter
2389                setpts_filter trim_filter"
2390 avplay_deps="avcodec avfilter avformat avresample sdl"
2391 avplay_libs='$sdl_libs'
2392 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2393 avprobe_deps="avcodec avformat"
2394
2395 # documentation
2396 pod2man_deps="doc"
2397 texi2html_deps="doc"
2398
2399 # default parameters
2400
2401 logfile="config.log"
2402
2403 # installation paths
2404 prefix_default="/usr/local"
2405 bindir_default='${prefix}/bin'
2406 datadir_default='${prefix}/share/avconv'
2407 docdir_default='${prefix}/share/doc/libav'
2408 incdir_default='${prefix}/include'
2409 libdir_default='${prefix}/lib'
2410 mandir_default='${prefix}/share/man'
2411 shlibdir_default="$libdir_default"
2412
2413 # toolchain
2414 ar_default="ar"
2415 cc_default="gcc"
2416 host_cc_default="gcc"
2417 cp_f="cp -f"
2418 ln_s="ln -s -f"
2419 nm_default="nm -g"
2420 objformat="elf"
2421 pkg_config_default=pkg-config
2422 ranlib="ranlib"
2423 strip="strip"
2424 yasmexe="yasm"
2425
2426 # machine
2427 arch_default=$(uname -m)
2428 cpu="generic"
2429 intrinsics="none"
2430
2431 # OS
2432 target_os_default=$(tolower $(uname -s))
2433 host_os=$target_os_default
2434
2435 # configurable options
2436 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2437
2438 enable asm
2439 enable debug
2440 enable doc
2441 enable faan faandct faanidct
2442 enable optimizations
2443 enable safe_bitstream_reader
2444 enable static
2445 enable swscale_alpha
2446 enable valgrind_backtrace
2447
2448 # By default, enable only those hwaccels that have no external dependencies.
2449 enable d3d11va dxva2 vda vdpau
2450
2451 # build settings
2452 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2453 LIBPREF="lib"
2454 LIBSUF=".a"
2455 FULLNAME='$(NAME)$(BUILDSUF)'
2456 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2457 SLIBPREF="lib"
2458 SLIBSUF=".so"
2459 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2460 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2461 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2462 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2463 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2464 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2465
2466 asflags_filter=echo
2467 cflags_filter=echo
2468 ldflags_filter=echo
2469
2470 AS_C='-c'
2471 AS_O='-o $@'
2472 CC_C='-c'
2473 CC_E='-E -o $@'
2474 CC_O='-o $@'
2475 OBJCC_C='-c'
2476 OBJCC_E='-E -o $@'
2477 OBJCC_O='-o $@'
2478 LD_O='-o $@'
2479 LD_LIB='-l%'
2480 LD_PATH='-L'
2481 HOSTCC_C='-c'
2482 HOSTCC_E='-E -o $@'
2483 HOSTCC_O='-o $@'
2484 HOSTLD_O='-o $@'
2485
2486 host_libs='-lm'
2487 host_cflags_filter=echo
2488 host_ldflags_filter=echo
2489
2490 target_path='$(CURDIR)'
2491
2492 # since the object filename is not given with the -MM flag, the compiler
2493 # is only able to print the basename, and we must add the path ourselves
2494 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2495 DEPFLAGS='-MM'
2496
2497 # find source path
2498 if test -f configure; then
2499     source_path=.
2500 else
2501     source_path=$(cd $(dirname "$0"); pwd)
2502     echo "$source_path" | grep -q '[[:blank:]]' &&
2503         die "Out of tree builds are impossible with whitespace in source path."
2504     test -e "$source_path/config.h" &&
2505         die "Out of tree builds are impossible with config.h in source dir."
2506 fi
2507
2508 for v in "$@"; do
2509     r=${v#*=}
2510     l=${v%"$r"}
2511     r=$(sh_quote "$r")
2512     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2513 done
2514
2515 find_things(){
2516     thing=$1
2517     pattern=$2
2518     file=$source_path/$3
2519     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2520 }
2521
2522 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2523 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2524 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2525 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2526 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2527 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2528 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2529 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2530 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2531
2532 find_things_extern(){
2533     thing=$1
2534     pattern=$2
2535     file=$source_path/$3
2536     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2537 }
2538
2539 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2540 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2541
2542 ALL_COMPONENTS="
2543     $BSF_LIST
2544     $DECODER_LIST
2545     $DEMUXER_LIST
2546     $ENCODER_LIST
2547     $FILTER_LIST
2548     $HWACCEL_LIST
2549     $INDEV_LIST
2550     $MUXER_LIST
2551     $OUTDEV_LIST
2552     $PARSER_LIST
2553     $PROTOCOL_LIST
2554 "
2555
2556 for n in $COMPONENT_LIST; do
2557     v=$(toupper ${n%s})_LIST
2558     eval enable \$$v
2559     eval ${n}_if_any="\$$v"
2560 done
2561
2562 enable $ARCH_EXT_LIST
2563
2564 die_unknown(){
2565     echo "Unknown option \"$1\"."
2566     echo "See $0 --help for available options."
2567     exit 1
2568 }
2569
2570 print_3_columns() {
2571     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2572 }
2573
2574 show_list() {
2575     suffix=_$1
2576     shift
2577     echo $* | sed s/$suffix//g | print_3_columns
2578     exit 0
2579 }
2580
2581 rand_list(){
2582     IFS=', '
2583     set -- $*
2584     unset IFS
2585     for thing; do
2586         comp=${thing%:*}
2587         prob=${thing#$comp}
2588         prob=${prob#:}
2589         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2590         echo "prob ${prob:-0.5}"
2591         printf '%s\n' $comp
2592     done
2593 }
2594
2595 do_random(){
2596     action=$1
2597     shift
2598     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2599     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2600 }
2601
2602 for opt do
2603     optval="${opt#*=}"
2604     case "$opt" in
2605         --extra-ldflags=*)
2606             add_ldflags $optval
2607         ;;
2608         --extra-ldexeflags=*)
2609             add_ldexeflags $optval
2610         ;;
2611         --extra-libs=*)
2612             add_extralibs $optval
2613         ;;
2614         --disable-devices)
2615             disable $INDEV_LIST $OUTDEV_LIST
2616         ;;
2617         --enable-debug=*)
2618             debuglevel="$optval"
2619         ;;
2620         --disable-programs)
2621             disable $PROGRAM_LIST
2622         ;;
2623         --disable-everything)
2624             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2625         ;;
2626         --disable-all)
2627             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2628             disable $LIBRARY_LIST $PROGRAM_LIST doc
2629         ;;
2630         --enable-random|--disable-random)
2631             action=${opt%%-random}
2632             do_random ${action#--} $COMPONENT_LIST
2633         ;;
2634         --enable-random=*|--disable-random=*)
2635             action=${opt%%-random=*}
2636             do_random ${action#--} $optval
2637         ;;
2638         --enable-*=*|--disable-*=*)
2639             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2640             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2641             eval list=\$$(toupper $thing)_LIST
2642             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2643             $action $(filter "$name" $list)
2644         ;;
2645         --enable-avserver|--disable-avserver*)
2646             warn "avserver has been removed, the ${opt} option is only"\
2647                  "provided for compatibility and will be removed in the future"
2648         ;;
2649         --enable-?*|--disable-?*)
2650             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2651             if is_in $option $COMPONENT_LIST; then
2652                 test $action = disable && action=unset
2653                 eval $action \$$(toupper ${option%s})_LIST
2654             elif is_in $option $CMDLINE_SELECT; then
2655                 $action $option
2656             else
2657                 die_unknown $opt
2658             fi
2659         ;;
2660         --list-*)
2661             NAME="${opt#--list-}"
2662             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2663             NAME=${NAME%s}
2664             eval show_list $NAME \$$(toupper $NAME)_LIST
2665         ;;
2666         --help|-h) show_help
2667         ;;
2668         *)
2669             optname="${opt%%=*}"
2670             optname="${optname#--}"
2671             optname=$(echo "$optname" | sed 's/-/_/g')
2672             if is_in $optname $CMDLINE_SET; then
2673                 eval $optname='$optval'
2674             elif is_in $optname $CMDLINE_APPEND; then
2675                 append $optname "$optval"
2676             else
2677                 die_unknown $opt
2678             fi
2679         ;;
2680     esac
2681 done
2682
2683 for e in $env; do
2684     eval "export $e"
2685 done
2686
2687 disabled logging && logfile=/dev/null
2688
2689 # Disable all the library-specific components if the library itself
2690 # is disabled, see AVCODEC_LIST and following _LIST variables.
2691
2692 disable_components(){
2693     disabled ${1} && disable $(
2694         eval components="\$$(toupper ${1})_COMPONENTS"
2695         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2696     )
2697 }
2698
2699 map 'disable_components $v' $LIBRARY_LIST
2700
2701 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2702 set >> $logfile
2703
2704 case "$toolchain" in
2705     *-asan)
2706         cc_default="${toolchain%-asan}"
2707         add_cflags  -fsanitize=address
2708         add_ldflags -fsanitize=address
2709     ;;
2710     *-msan)
2711         cc_default="${toolchain%-msan}"
2712         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2713         add_ldflags -fsanitize=memory
2714     ;;
2715     *-tsan)
2716         cc_default="${toolchain%-tsan}"
2717         add_cflags  -fsanitize=thread -pie
2718         add_ldflags -fsanitize=thread -pie
2719         case "$toolchain" in
2720             gcc-tsan)
2721                 add_cflags  -fPIC
2722                 add_ldflags -fPIC
2723                 ;;
2724         esac
2725     ;;
2726     *-usan)
2727         cc_default="${toolchain%-usan}"
2728         add_cflags  -fsanitize=undefined
2729         add_ldflags -fsanitize=undefined
2730         case "$toolchain" in
2731             clang-usan)
2732                 add_cflags -O1
2733                 ;;
2734         esac
2735     ;;
2736     valgrind-*)
2737         target_exec_default="valgrind"
2738         case "$toolchain" in
2739             valgrind-massif)
2740                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2741                 ;;
2742             valgrind-memcheck)
2743                 target_exec_args="--track-origins=yes --leak-check=full"
2744                 ;;
2745         esac
2746     ;;
2747     msvc)
2748         # Check whether the current MSVC version needs the C99 converter.
2749         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2750         # support enough of C99 to build libav. Default to the new
2751         # behaviour if the regexp was unable to match anything, since this
2752         # successfully parses the version number of existing supported
2753         # versions that require the converter (MSVC 2010 and 2012).
2754         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2755         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2756             cc_default="cl"
2757         else
2758             cc_default="c99wrap cl"
2759         fi
2760         ld_default="$source_path/compat/windows/mslink"
2761         nm_default="dumpbin -symbols"
2762         ar_default="lib"
2763         case "$arch" in
2764         arm*)
2765             as_default="armasm"
2766             ;;
2767         esac
2768         target_os_default="win32"
2769         # Use a relative path for TMPDIR. This makes sure all the
2770         # ffconf temp files are written with a relative path, avoiding
2771         # issues with msys/win32 path conversion for MSVC parameters
2772         # such as -Fo<file> or -out:<file>.
2773         TMPDIR=.
2774     ;;
2775     icl)
2776         cc_default="icl"
2777         ld_default="xilink"
2778         nm_default="dumpbin -symbols"
2779         ar_default="xilib"
2780         target_os_default="win32"
2781         TMPDIR=.
2782     ;;
2783     gcov)
2784         add_cflags  -fprofile-arcs -ftest-coverage
2785         add_ldflags -fprofile-arcs -ftest-coverage
2786     ;;
2787     llvm-cov)
2788         add_cflags -fprofile-arcs -ftest-coverage
2789         add_ldflags --coverage
2790     ;;
2791     hardened)
2792         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2793         add_cflags   -fno-strict-overflow -fstack-protector-all
2794         add_ldflags  -Wl,-z,relro -Wl,-z,now
2795     ;;
2796     ?*)
2797         die "Unknown toolchain $toolchain"
2798     ;;
2799 esac
2800
2801 test -n "$cross_prefix" && enable cross_compile
2802
2803 if enabled cross_compile; then
2804     test -n "$arch" && test -n "$target_os" ||
2805         die "Must specify target arch and OS when cross-compiling"
2806 fi
2807
2808 ar_default="${cross_prefix}${ar_default}"
2809 cc_default="${cross_prefix}${cc_default}"
2810 occ_default="${cross_prefix}${occ_default}"
2811 nm_default="${cross_prefix}${nm_default}"
2812 pkg_config_default="${cross_prefix}${pkg_config_default}"
2813 ranlib="${cross_prefix}${ranlib}"
2814 strip="${cross_prefix}${strip}"
2815
2816 sysinclude_default="${sysroot}/usr/include"
2817
2818 set_default arch cc pkg_config sysinclude target_exec target_os
2819 enabled cross_compile || host_cc_default=$cc
2820 set_default host_cc
2821
2822 if ! $pkg_config --version >/dev/null 2>&1; then
2823     warn "$pkg_config not found, library detection may fail."
2824     pkg_config=false
2825 fi
2826
2827 exesuf() {
2828     case $1 in
2829         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2830     esac
2831 }
2832
2833 EXESUF=$(exesuf $target_os)
2834 HOSTEXESUF=$(exesuf $host_os)
2835
2836 # set temporary file name
2837 : ${TMPDIR:=$TEMPDIR}
2838 : ${TMPDIR:=$TMP}
2839 : ${TMPDIR:=/tmp}
2840
2841 if ! check_cmd mktemp -u XXXXXX; then
2842     # simple replacement for missing mktemp
2843     # NOT SAFE FOR GENERAL USE
2844     mktemp(){
2845         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2846     }
2847 fi
2848
2849 tmpfile(){
2850     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2851         (set -C; exec > $tmp) 2>/dev/null ||
2852         die "Unable to create temporary file in $TMPDIR."
2853     append TMPFILES $tmp
2854     eval $1=$tmp
2855 }
2856
2857 trap 'rm -f -- $TMPFILES' EXIT
2858
2859 tmpfile TMPASM .asm
2860 tmpfile TMPC   .c
2861 tmpfile TMPE   $EXESUF
2862 tmpfile TMPH   .h
2863 tmpfile TMPO   .o
2864 tmpfile TMPS   .S
2865 tmpfile TMPSH  .sh
2866 tmpfile TMPV   .ver
2867
2868 unset -f mktemp
2869
2870 chmod +x $TMPE
2871
2872 # make sure we can execute files in $TMPDIR
2873 cat > $TMPSH 2>> $logfile <<EOF
2874 #! /bin/sh
2875 EOF
2876 chmod +x $TMPSH >> $logfile 2>&1
2877 if ! $TMPSH >> $logfile 2>&1; then
2878     cat <<EOF
2879 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2880 variable to another directory and make sure that it is not mounted noexec.
2881 EOF
2882     die "Sanity test failed."
2883 fi
2884
2885 armasm_flags(){
2886     for flag; do
2887         case $flag in
2888             # Filter out MSVC cl.exe options from cflags that shouldn't
2889             # be passed to gas-preprocessor
2890             -M[TD]*)                                            ;;
2891             *)                  echo $flag                      ;;
2892         esac
2893    done
2894 }
2895
2896 ccc_flags(){
2897     for flag; do
2898         case $flag in
2899             -std=c99)           echo -c99                       ;;
2900             -mcpu=*)            echo -arch ${flag#*=}           ;;
2901             -mieee)             echo -ieee                      ;;
2902             -O*|-fast)          echo $flag                      ;;
2903             -fno-math-errno)    echo -assume nomath_errno       ;;
2904             -g)                 echo -g3                        ;;
2905             -Wall)              echo -msg_enable level2         ;;
2906             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2907             -Wl,*)              echo $flag                      ;;
2908             -f*|-W*)                                            ;;
2909             *)                  echo $flag                      ;;
2910         esac
2911    done
2912 }
2913
2914 cparser_flags(){
2915     for flag; do
2916         case $flag in
2917             -Wno-switch)             echo -Wno-switch-enum ;;
2918             -Wno-format-zero-length) ;;
2919             -Wdisabled-optimization) ;;
2920             -Wno-pointer-sign)       echo -Wno-other ;;
2921             *)                       echo $flag ;;
2922         esac
2923     done
2924 }
2925
2926 msvc_common_flags(){
2927     for flag; do
2928         case $flag in
2929             # In addition to specifying certain flags under the compiler
2930             # specific filters, they must be specified here as well or else the
2931             # generic catch all at the bottom will print the original flag.
2932             -Wall)                ;;
2933             -std=c99)             ;;
2934             # Common flags
2935             -fomit-frame-pointer) ;;
2936             -g)                   echo -Z7 ;;
2937             -fno-math-errno)      ;;
2938             -fno-common)          ;;
2939             -fno-signed-zeros)    ;;
2940             -fPIC)                ;;
2941             -mthumb)              ;;
2942             -march=*)             ;;
2943             -lz)                  echo zlib.lib ;;
2944             -lavifil32)           echo vfw32.lib ;;
2945             -lavicap32)           echo vfw32.lib user32.lib ;;
2946             -lx264)               echo libx264.lib ;;
2947             -l*)                  echo ${flag#-l}.lib ;;
2948             -L*)                  echo -libpath:${flag#-L} ;;
2949             *)                    echo $flag ;;
2950         esac
2951     done
2952 }
2953
2954 msvc_flags(){
2955     msvc_common_flags "$@"
2956     for flag; do
2957         case $flag in
2958             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2959                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2960                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2961                                        -wd4273 -wd4554 -wd4701 ;;
2962         esac
2963     done
2964 }
2965
2966 icl_flags(){
2967     msvc_common_flags "$@"
2968     for flag; do
2969         case $flag in
2970             # Despite what Intel's documentation says -Wall, which is supported
2971             # on Windows, does enable remarks so disable them here.
2972             -Wall)                echo $flag -Qdiag-disable:remark ;;
2973             -std=c99)             echo -Qstd=c99 ;;
2974         esac
2975     done
2976 }
2977
2978 pgi_flags(){
2979     for flag; do
2980         case $flag in
2981             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2982             -fomit-frame-pointer) echo -Mnoframe ;;
2983             -g)                   echo -gopt ;;
2984             *)                    echo $flag ;;
2985         esac
2986     done
2987 }
2988
2989 suncc_flags(){
2990     for flag; do
2991         case $flag in
2992             -march=*|-mcpu=*)
2993                 case "${flag#*=}" in
2994                     native)                   echo -xtarget=native       ;;
2995                     v9|niagara)               echo -xarch=sparc          ;;
2996                     ultrasparc)               echo -xarch=sparcvis       ;;
2997                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2998                     i586|pentium)             echo -xchip=pentium        ;;
2999                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3000                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3001                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3002                     pentium4*)          echo -xtarget=pentium4           ;;
3003                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3004                     *-sse3)             echo -xarch=sse3                 ;;
3005                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3006                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3007                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3008                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3009                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3010                     k8|opteron|athlon64|athlon-fx)
3011                                                echo -xarch=sse2a         ;;
3012                     athlon*)                   echo -xarch=pentium_proa  ;;
3013                 esac
3014                 ;;
3015             -std=c99)             echo -xc99              ;;
3016             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3017             -fPIC)                echo -KPIC -xcode=pic32 ;;
3018             -W*,*)                echo $flag              ;;
3019             -f*-*|-W*|-mimpure-text)                      ;;
3020             -shared)              echo -G                 ;;
3021             *)                    echo $flag              ;;
3022         esac
3023     done
3024 }
3025
3026 tms470_flags(){
3027     for flag; do
3028         case $flag in
3029             -march=*|-mcpu=*)
3030                 case "${flag#*=}" in
3031                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3032                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3033                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3034                     armv6*|arm11*)          echo -mv=6   ;;
3035                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3036                                             echo -mv=5e  ;;
3037                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3038                 esac
3039                 ;;
3040             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3041             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3042             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3043             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3044             -msoft-float)   echo --float_support=vfplib       ;;
3045             -O[0-3]|-mf=*)  echo $flag                        ;;
3046             -g)             echo -g -mn                       ;;
3047             -pds=*)         echo $flag                        ;;
3048             -D*|-I*)        echo $flag                        ;;
3049             --gcc|--abi=*)  echo $flag                        ;;
3050             -me)            echo $flag                        ;;
3051         esac
3052     done
3053 }
3054
3055 probe_cc(){
3056     pfx=$1
3057     _cc=$2
3058
3059     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3060     unset _ld_o _ldflags _ld_lib _ld_path
3061     unset _depflags _DEPCMD _DEPFLAGS
3062     _flags_filter=echo
3063
3064     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3065         _type=llvm_gcc
3066         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3067         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3068         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3069         _cflags_speed='-O3'
3070         _cflags_size='-Os'
3071     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3072         _type=gcc
3073         gcc_version=$($_cc --version | head -n1)
3074         gcc_basever=$($_cc -dumpversion)
3075         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3076         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3077         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3078         if ! $_cc -dumpversion | grep -q '^2\.'; then
3079             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3080         fi
3081         _cflags_speed='-O3'
3082         _cflags_size='-Os'
3083     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3084         _type=icc
3085         _ident=$($_cc --version | head -n1)
3086         _depflags='-MMD'
3087         _cflags_speed='-O3'
3088         _cflags_size='-Os'
3089         _cflags_noopt='-O1'
3090     elif $_cc -v 2>&1 | grep -q xlc; then
3091         _type=xlc
3092         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3093         _cflags_speed='-O5'
3094         _cflags_size='-O5 -qcompact'
3095     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3096         _type=ccc
3097         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3098         _DEPFLAGS='-M'
3099         _cflags_speed='-fast'
3100         _cflags_size='-O1'
3101         _flags_filter=ccc_flags
3102     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3103         test -d "$sysroot" || die "No valid sysroot specified."
3104         _type=armcc
3105         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3106         armcc_conf="$PWD/armcc.conf"
3107         $_cc --arm_linux_configure                 \
3108              --arm_linux_config_file="$armcc_conf" \
3109              --configure_sysroot="$sysroot"        \
3110              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3111              die "Error creating armcc configuration file."
3112         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3113         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3114         as_default="${cross_prefix}gcc"
3115         _depflags='-MMD'
3116         _cflags_speed='-O3'
3117         _cflags_size='-Os'
3118     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3119         _type=tms470
3120         _ident=$($_cc -version | head -n1 | tr -s ' ')
3121         _flags='--gcc --abi=eabi -me'
3122         _cc_e='-ppl -fe=$@'
3123         _cc_o='-fe=$@'
3124         _depflags='-ppa -ppd=$(@:.o=.d)'
3125         _cflags_speed='-O3 -mf=5'
3126         _cflags_size='-O3 -mf=2'
3127         _flags_filter=tms470_flags
3128     elif $_cc -v 2>&1 | grep -q clang; then
3129         _type=clang
3130         _ident=$($_cc --version 2>/dev/null | head -n1)
3131         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3132         _cflags_speed='-O3'
3133         _cflags_size='-Os'
3134     elif $_cc -V 2>&1 | grep -q Sun; then
3135         _type=suncc
3136         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3137         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3138         _DEPFLAGS='-xM1 -xc99'
3139         _ldflags='-std=c99'
3140         _cflags_speed='-O5'
3141         _cflags_size='-O5 -xspace'
3142         _flags_filter=suncc_flags
3143     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3144         _type=pathscale
3145         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3146         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3147         _cflags_speed='-O2'
3148         _cflags_size='-Os'
3149         _flags_filter='filter_out -Wdisabled-optimization'
3150     elif $_cc -v 2>&1 | grep -q Open64; then
3151         _type=open64
3152         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3153         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3154         _cflags_speed='-O2'
3155         _cflags_size='-Os'
3156         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3157     elif $_cc -V 2>&1 | grep -q Portland; then
3158         _type=pgi
3159         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3160         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3161         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3162         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3163         _cflags_noopt="-O1"
3164         _flags_filter=pgi_flags
3165     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3166         _type=armasm
3167         _ident=$($_cc | head -n1)
3168         # 4509: "This form of conditional instruction is deprecated"
3169         _flags="-nologo -ignore 4509"
3170         _flags_filter=armasm_flags
3171     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3172         _type=msvc
3173         _ident=$($_cc 2>&1 | head -n1)
3174         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3175         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3176         _cflags_speed="-O2"
3177         _cflags_size="-O1"
3178         if $_cc -nologo- 2>&1 | grep -q Linker; then
3179             _ld_o='-out:$@'
3180         else
3181             _ld_o='-Fe$@'
3182         fi
3183         _cc_o='-Fo$@'
3184         _cc_e='-P -Fi$@'
3185         _flags_filter=msvc_flags
3186         _ld_lib='lib%.a'
3187         _ld_path='-libpath:'
3188         _flags='-nologo'
3189         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3190     elif $_cc 2>&1 | grep -q Intel; then
3191         _type=icl
3192         _ident=$($_cc 2>&1 | head -n1)
3193         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3194         # Not only is O3 broken on 13.x+ but it is slower on all previous
3195         # versions (tested) as well.
3196         _cflags_speed="-O2"
3197         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3198         if $_cc 2>&1 | grep -q Linker; then
3199             _ld_o='-out:$@'
3200         else
3201             _ld_o='-Fe$@'
3202         fi
3203         _cc_o='-Fo$@'
3204         _cc_e='-P'
3205         _flags_filter=icl_flags
3206         _ld_lib='lib%.a'
3207         _ld_path='-libpath:'
3208         # -Qdiag-error to make icl error when seeing certain unknown arguments
3209         _flags='-nologo -Qdiag-error:4044,10157'
3210         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3211         # with MSVC which enables it by default.
3212         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3213     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3214         _type=cparser
3215         _ident=$($_cc --version | head -n1)
3216         _depflags='-MMD'
3217         _cflags_speed='-O4'
3218         _cflags_size='-O2'
3219         _flags_filter=cparser_flags
3220     fi
3221
3222     eval ${pfx}_type=\$_type
3223     eval ${pfx}_ident=\$_ident
3224 }
3225
3226 set_ccvars(){
3227     eval ${1}_C=\${_cc_c-\${${1}_C}}
3228     eval ${1}_E=\${_cc_e-\${${1}_E}}
3229     eval ${1}_O=\${_cc_o-\${${1}_O}}
3230
3231     if [ -n "$_depflags" ]; then
3232         eval ${1}_DEPFLAGS=\$_depflags
3233     else
3234         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3235         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3236         eval DEP${1}FLAGS=\$_flags
3237     fi
3238 }
3239
3240 probe_cc cc "$cc"
3241 cflags_filter=$_flags_filter
3242 cflags_speed=$_cflags_speed
3243 cflags_size=$_cflags_size
3244 cflags_noopt=$_cflags_noopt
3245 add_cflags $_flags $_cflags
3246 cc_ldflags=$_ldflags
3247 set_ccvars CC
3248
3249 probe_cc hostcc "$host_cc"
3250 host_cflags_filter=$_flags_filter
3251 add_host_cflags  $_flags $_cflags
3252 set_ccvars HOSTCC
3253
3254 test -n "$cc_type" && enable $cc_type ||
3255     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3256
3257 : ${as_default:=$cc}
3258 : ${objcc_default:=$cc}
3259 : ${dep_cc_default:=$cc}
3260 : ${ld_default:=$cc}
3261 : ${host_ld_default:=$host_cc}
3262 set_default ar as objcc dep_cc ld host_ld
3263
3264 probe_cc as "$as"
3265 asflags_filter=$_flags_filter
3266 add_asflags $_flags $_cflags
3267 set_ccvars AS
3268
3269 probe_cc objcc "$objcc"
3270 objcflags_filter=$_flags_filter
3271 add_objcflags $_flags $_cflags
3272 set_ccvars OBJC
3273
3274 probe_cc ld "$ld"
3275 ldflags_filter=$_flags_filter
3276 add_ldflags $_flags $_ldflags
3277 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3278 LD_O=${_ld_o-$LD_O}
3279 LD_LIB=${_ld_lib-$LD_LIB}
3280 LD_PATH=${_ld_path-$LD_PATH}
3281
3282 probe_cc hostld "$host_ld"
3283 host_ldflags_filter=$_flags_filter
3284 add_host_ldflags $_flags $_ldflags
3285 HOSTLD_O=${_ld_o-$HOSTLD_O}
3286
3287 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3288     probe_cc depcc "$dep_cc"
3289     CCDEP=${_DEPCMD:-$DEPCMD}
3290     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3291     DEPCCFLAGS=$_flags
3292 fi
3293
3294 if $ar 2>&1 | grep -q Microsoft; then
3295     arflags="-nologo"
3296     ar_o='-out:$@'
3297 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3298     arflags="rq"
3299     ar_o='$@'
3300 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3301     arflags='-Xany -r -c'
3302     ar_o='$@'
3303 else
3304     arflags="rc"
3305     ar_o='$@'
3306 fi
3307
3308 add_cflags $extra_cflags
3309 add_objcflags $extra_objcflags
3310 add_asflags $extra_cflags
3311
3312 if test -n "$sysroot"; then
3313     case "$cc_type" in
3314         gcc|llvm_gcc|clang)
3315             add_cppflags --sysroot="$sysroot"
3316             add_ldflags --sysroot="$sysroot"
3317         ;;
3318         tms470)
3319             add_cppflags -I"$sysinclude"
3320             add_ldflags  --sysroot="$sysroot"
3321         ;;
3322     esac
3323 fi
3324
3325 if test "$cpu" = host; then
3326     enabled cross_compile &&
3327         die "--cpu=host makes no sense when cross-compiling."
3328
3329     case "$cc_type" in
3330         gcc|llvm_gcc)
3331             check_native(){
3332                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3333                 sed -n "/cc1.*$1=/{
3334                             s/.*$1=\\([^ ]*\\).*/\\1/
3335                             p
3336                             q
3337                         }" $TMPE
3338             }
3339             cpu=$(check_native -march || check_native -mcpu)
3340         ;;
3341     esac
3342
3343     test "${cpu:-host}" = host &&
3344         die "--cpu=host not supported with compiler $cc"
3345 fi
3346
3347 # Deal with common $arch aliases
3348 case "$arch" in
3349     aarch64|arm64)
3350         arch="aarch64"
3351     ;;
3352     arm*)
3353         arch="arm"
3354     ;;
3355     mips*|IP*)
3356         case "$arch" in
3357         *el)
3358             add_cppflags -EL
3359             add_ldflags -EL
3360         ;;
3361         *eb)
3362             add_cppflags -EB
3363             add_ldflags -EB
3364         ;;
3365         esac
3366         arch="mips"
3367     ;;
3368     parisc*|hppa*)
3369         arch="parisc"
3370     ;;
3371     "Power Macintosh"|ppc*|powerpc*)
3372         arch="ppc"
3373     ;;
3374     s390|s390x)
3375         arch="s390"
3376     ;;
3377     sh4|sh)
3378         arch="sh4"
3379     ;;
3380     sun4u|sparc*)
3381         arch="sparc"
3382     ;;
3383     tilegx|tile-gx)
3384         arch="tilegx"
3385     ;;
3386     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3387         arch="x86"
3388     ;;
3389 esac
3390
3391 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3392 enable $arch
3393
3394 # Add processor-specific flags
3395 if enabled aarch64; then
3396
3397     case $cpu in
3398         armv*)
3399             cpuflags="-march=$cpu"
3400         ;;
3401         *)
3402             cpuflags="-mcpu=$cpu"
3403         ;;
3404     esac
3405
3406 elif enabled alpha; then
3407
3408     cpuflags="-mcpu=$cpu"
3409
3410 elif enabled arm; then
3411
3412     check_arm_arch() {
3413         check_cpp_condition stddef.h \
3414             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3415             $cpuflags
3416     }
3417
3418     probe_arm_arch() {
3419         if   check_arm_arch 4;        then echo armv4;
3420         elif check_arm_arch 4T;       then echo armv4t;
3421         elif check_arm_arch 5;        then echo armv5;
3422         elif check_arm_arch 5E;       then echo armv5e;
3423         elif check_arm_arch 5T;       then echo armv5t;
3424         elif check_arm_arch 5TE;      then echo armv5te;
3425         elif check_arm_arch 5TEJ;     then echo armv5te;
3426         elif check_arm_arch 6;        then echo armv6;
3427         elif check_arm_arch 6J;       then echo armv6j;
3428         elif check_arm_arch 6K;       then echo armv6k;
3429         elif check_arm_arch 6Z;       then echo armv6z;
3430         elif check_arm_arch 6ZK;      then echo armv6zk;
3431         elif check_arm_arch 6T2;      then echo armv6t2;
3432         elif check_arm_arch 7;        then echo armv7;
3433         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3434         elif check_arm_arch 7S;       then echo armv7-a;
3435         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3436         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3437         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3438         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3439         fi
3440     }
3441
3442     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3443
3444     case $cpu in
3445         armv*)
3446             cpuflags="-march=$cpu"
3447             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3448         ;;
3449         *)
3450             cpuflags="-mcpu=$cpu"
3451             case $cpu in
3452                 cortex-a*)                               subarch=armv7a  ;;
3453                 cortex-r*)                               subarch=armv7r  ;;
3454                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3455                 arm11*)                                  subarch=armv6   ;;
3456                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3457                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3458                 *)                             subarch=$(probe_arm_arch) ;;
3459             esac
3460         ;;
3461     esac
3462
3463     case "$subarch" in
3464         armv5t*)    enable fast_clz                ;;
3465         armv[6-8]*) enable fast_clz fast_unaligned ;;
3466     esac
3467
3468 elif enabled avr32; then
3469
3470     case $cpu in
3471         ap7[02]0[0-2])
3472             subarch="avr32_ap"
3473             cpuflags="-mpart=$cpu"
3474         ;;
3475         ap)
3476             subarch="avr32_ap"
3477             cpuflags="-march=$cpu"
3478         ;;
3479         uc3[ab]*)
3480             subarch="avr32_uc"
3481             cpuflags="-mcpu=$cpu"
3482         ;;
3483         uc)
3484             subarch="avr32_uc"
3485             cpuflags="-march=$cpu"
3486         ;;
3487     esac
3488
3489 elif enabled bfin; then
3490
3491     cpuflags="-mcpu=$cpu"
3492
3493 elif enabled mips; then
3494
3495     cpuflags="-march=$cpu"
3496
3497 elif enabled ppc; then
3498
3499     disable ldbrx
3500
3501     case $(tolower $cpu) in
3502         601|ppc601|powerpc601)
3503             cpuflags="-mcpu=601"
3504             disable altivec
3505         ;;
3506         603*|ppc603*|powerpc603*)
3507             cpuflags="-mcpu=603"
3508             disable altivec
3509         ;;
3510         604*|ppc604*|powerpc604*)
3511             cpuflags="-mcpu=604"
3512             disable altivec
3513         ;;
3514         g3|75*|ppc75*|powerpc75*)
3515             cpuflags="-mcpu=750"
3516             disable altivec
3517         ;;
3518         g4|745*|ppc745*|powerpc745*)
3519             cpuflags="-mcpu=7450"
3520             disable vsx
3521         ;;
3522         74*|ppc74*|powerpc74*)
3523             cpuflags="-mcpu=7400"
3524             disable vsx
3525         ;;
3526         g5|970|ppc970|powerpc970)
3527             cpuflags="-mcpu=970"
3528             disable vsx
3529         ;;
3530         power[3-6]*)
3531             cpuflags="-mcpu=$cpu"
3532             disable vsx
3533         ;;
3534         power[7-8]*)
3535             cpuflags="-mcpu=$cpu"
3536             enable ldbrx
3537         ;;
3538         cell)
3539             cpuflags="-mcpu=cell"
3540             enable ldbrx
3541             disable vsx
3542         ;;
3543         e500mc)
3544             cpuflags="-mcpu=e500mc"
3545             disable altivec
3546         ;;
3547         e500v2)
3548             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3549             disable altivec
3550             disable dcbzl
3551         ;;
3552         e500)
3553             cpuflags="-mcpu=8540 -mhard-float"
3554             disable altivec
3555             disable dcbzl
3556         ;;
3557     esac
3558
3559 elif enabled sparc; then
3560
3561     case $cpu in
3562         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3563             cpuflags="-mcpu=$cpu"
3564         ;;
3565         ultrasparc*|niagara[234])
3566             cpuflags="-mcpu=$cpu"
3567         ;;
3568     esac
3569
3570 elif enabled x86; then
3571
3572     case $cpu in
3573         i[345]86|pentium)
3574             cpuflags="-march=$cpu"
3575             disable i686
3576             disable mmx
3577         ;;
3578         # targets that do NOT support nopl and conditional mov (cmov)
3579         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3580             cpuflags="-march=$cpu"
3581             disable i686
3582         ;;
3583         # targets that do support nopl and conditional mov (cmov)
3584         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3585             cpuflags="-march=$cpu"
3586             enable i686
3587             enable fast_cmov
3588         ;;
3589         # targets that do support conditional mov but on which it's slow
3590         pentium4|pentium4m|prescott|nocona)
3591             cpuflags="-march=$cpu"
3592             enable i686
3593             disable fast_cmov
3594         ;;
3595     esac
3596
3597 fi
3598
3599 if [ "$cpu" != generic ]; then
3600     add_cflags  $cpuflags
3601     add_asflags $cpuflags
3602     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3603 fi
3604
3605 # compiler sanity check
3606 check_exec <<EOF
3607 int main(void){ return 0; }
3608 EOF
3609 if test "$?" != 0; then
3610     echo "$cc is unable to create an executable file."
3611     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3612         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3613         echo "Only do this if you know what cross compiling means."
3614     fi
3615     die "C compiler test failed."
3616 fi
3617
3618 add_cppflags -D_ISOC99_SOURCE
3619 check_cflags -std=c99
3620 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3621 #include <stdlib.h>
3622 EOF
3623 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3624 #include <stdlib.h>
3625 EOF
3626
3627 add_host_cppflags -D_ISOC99_SOURCE
3628 check_host_cflags -std=c99
3629 check_host_cflags -Wall
3630 check_host_cflags -O3
3631
3632 check_64bit(){
3633     arch32=$1
3634     arch64=$2
3635     expr=$3
3636     check_code cc "" "int test[2*($expr) - 1]" &&
3637         subarch=$arch64 || subarch=$arch32
3638 }
3639
3640 case "$arch" in
3641     aarch64|alpha|ia64)
3642         spic=$shared
3643     ;;
3644     mips)
3645         check_64bit mips mips64 '_MIPS_SIM > 1'
3646         spic=$shared
3647     ;;
3648     parisc)
3649         check_64bit parisc parisc64 'sizeof(void *) > 4'
3650         spic=$shared
3651     ;;
3652     ppc)
3653         check_64bit ppc ppc64 'sizeof(void *) > 4'
3654         spic=$shared
3655     ;;
3656     s390)
3657         check_64bit s390 s390x 'sizeof(void *) > 4'
3658         spic=$shared
3659     ;;
3660     sparc)
3661         check_64bit sparc sparc64 'sizeof(void *) > 4'
3662         spic=$shared
3663     ;;
3664     x86)
3665         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3666         if test "$subarch" = "x86_64"; then
3667             spic=$shared
3668         fi
3669     ;;
3670 esac
3671
3672 enable $subarch
3673 enabled spic && enable_weak pic
3674
3675 # OS specific
3676 case $target_os in
3677     aix)
3678         SHFLAGS=-shared
3679         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3680         enabled shared && add_ldflags -Wl,-brtl
3681         ;;
3682     android)
3683         disable symver
3684         enable section_data_rel_ro
3685         SLIB_INSTALL_NAME='$(SLIBNAME)'
3686         SLIB_INSTALL_LINKS=
3687         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3688         ;;
3689     haiku)
3690         prefix_default="/boot/common"
3691         network_extralibs="-lnetwork"
3692         host_libs=
3693         ;;
3694     sunos)
3695         SHFLAGS='-shared -Wl,-h,$$(@F)'
3696         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3697         network_extralibs="-lsocket -lnsl"
3698         # When using suncc to build, the Solaris linker will mark
3699         # an executable with each instruction set encountered by
3700         # the Solaris assembler.  As our libraries contain their own
3701         # guards for processor-specific code, instead suppress
3702         # generation of the HWCAPS ELF section on Solaris x86 only.
3703         enabled_all suncc x86 &&
3704             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3705             add_ldflags -Wl,-M,mapfile
3706         nm_default='nm -P -g'
3707         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3708         ;;
3709     netbsd)
3710         disable symver
3711         oss_indev_extralibs="-lossaudio"
3712         oss_outdev_extralibs="-lossaudio"
3713         ;;
3714     openbsd|bitrig)
3715         disable symver
3716         SHFLAGS='-shared'
3717         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3718         SLIB_INSTALL_LINKS=
3719         oss_indev_extralibs="-lossaudio"
3720         oss_outdev_extralibs="-lossaudio"
3721         ;;
3722     dragonfly)
3723         disable symver
3724         ;;
3725     freebsd)
3726         ;;
3727     bsd/os)
3728         add_extralibs -lpoll -lgnugetopt
3729         ;;
3730     darwin)
3731         enabled ppc && add_asflags -force_cpusubtype_ALL
3732         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3733         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3734         add_ldflags -Wl,-dynamic,-search_paths_first
3735         SLIBSUF=".dylib"
3736         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3737         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3738         objformat="macho"
3739         enabled x86_64 && objformat="macho64"
3740         enabled_any pic shared ||
3741             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3742         ;;
3743     msys*)
3744         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3745         ;;
3746     mingw32*|mingw64*)
3747         if test $target_os = "mingw32ce"; then
3748             disable network
3749         else
3750             target_os=mingw32
3751         fi
3752         LIBTARGET=i386
3753         if enabled x86_64; then
3754             LIBTARGET="i386:x86-64"
3755         elif enabled arm; then
3756             LIBTARGET=arm-wince
3757         fi
3758         check_ldflags -Wl,--nxcompat
3759         check_ldflags -Wl,--dynamicbase
3760         shlibdir_default="$bindir_default"
3761         SLIBPREF=""
3762         SLIBSUF=".dll"
3763         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3764         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3765         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3766         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3767         SLIB_INSTALL_LINKS=
3768         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3769         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3770         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3771         objformat="win32"
3772         dlltool="${cross_prefix}dlltool"
3773         ranlib=:
3774         enable dos_paths
3775         ;;
3776     win32|win64)
3777         disable symver
3778         if enabled shared; then
3779             # Link to the import library instead of the normal static library
3780             # for shared libs.
3781             LD_LIB='%.lib'
3782             # Cannot build both shared and static libs with MSVC or icl.
3783             disable static
3784         fi
3785         shlibdir_default="$bindir_default"
3786         SLIBPREF=""
3787         SLIBSUF=".dll"
3788         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3789         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3790         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3791         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3792         SLIB_INSTALL_LINKS=
3793         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3794         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3795         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3796         objformat="win32"
3797         ranlib=:
3798         enable dos_paths
3799         ;;
3800     cygwin*)
3801         target_os=cygwin
3802         shlibdir_default="$bindir_default"
3803         SLIBPREF="cyg"
3804         SLIBSUF=".dll"
3805         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3806         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3807         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3808         SLIB_INSTALL_LINKS=
3809         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3810         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3811         objformat="win32"
3812         enable dos_paths
3813         ;;
3814     *-dos|freedos|opendos)
3815         network_extralibs="-lsocket"
3816         objformat="coff"
3817         enable dos_paths
3818         add_cppflags -U__STRICT_ANSI__
3819         ;;
3820     linux)
3821         enable dv1394
3822         enable section_data_rel_ro
3823         ;;
3824     irix*)
3825         target_os=irix
3826         ranlib="echo ignoring ranlib"
3827         ;;
3828     os/2*)
3829         ln_s="cp -f"
3830         objformat="aout"
3831         add_cppflags -D_GNU_SOURCE
3832         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3833         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3834         LIBSUF="_s.a"
3835         SLIBPREF=""
3836         SLIBSUF=".dll"
3837         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3838         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3839         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3840             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3841             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3842             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3843             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3844         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3845             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3846         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3847         enable dos_paths
3848         ;;
3849     gnu/kfreebsd)
3850         add_cppflags -D_BSD_SOURCE
3851         ;;
3852     gnu)
3853         ;;
3854     qnx)
3855         add_cppflags -D_QNX_SOURCE
3856         network_extralibs="-lsocket"
3857         ;;
3858     symbian)
3859         SLIBSUF=".dll"
3860         enable dos_paths
3861         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3862         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3863         add_ldflags -Wl,--target1-abs,--no-undefined \
3864                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3865                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3866         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3867                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3868                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3869         ;;
3870     osf1)
3871         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3872         ;;
3873     minix)
3874         ;;
3875     plan9)
3876         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3877                      -D_REENTRANT_SOURCE        \
3878                      -D_RESEARCH_SOURCE         \
3879                      -DFD_SETSIZE=96            \
3880                      -DHAVE_SOCK_OPTS
3881         add_compat strtod.o strtod=avpriv_strtod
3882         network_extralibs='-lbsd'
3883         exeobjs=compat/plan9/main.o
3884         cp_f='cp'
3885         ;;
3886     none)
3887         ;;
3888     *)
3889         die "Unknown OS '$target_os'."
3890         ;;
3891 esac
3892
3893 # determine libc flavour
3894
3895 probe_libc(){
3896     pfx=$1
3897     pfx_no_=${pfx%_}
3898     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3899     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3900         eval ${pfx}libc_type=uclibc
3901         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3902     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3903         eval ${pfx}libc_type=glibc
3904         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3905     # MinGW headers can be installed on Cygwin, so check for newlib first.
3906     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3907         eval ${pfx}libc_type=newlib
3908         add_${pfx}cppflags -U__STRICT_ANSI__
3909     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3910     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3911         eval ${pfx}libc_type=mingw64
3912         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3913         eval test \$${pfx_no_}cc_type = "gcc" &&
3914             add_${pfx}cppflags -D__printf__=__gnu_printf__
3915     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3916          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3917         eval ${pfx}libc_type=mingw32
3918         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3919             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3920             die "ERROR: MinGW32 runtime version must be >= 3.15."
3921         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3922         eval test \$${pfx_no_}cc_type = "gcc" &&
3923             add_${pfx}cppflags -D__printf__=__gnu_printf__
3924     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3925         eval ${pfx}libc_type=msvcrt
3926         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3927             if [ "$pfx" = host_ ]; then
3928                 add_host_cppflags -Dsnprintf=_snprintf
3929             else
3930                 add_compat strtod.o strtod=avpriv_strtod
3931                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3932                                              _snprintf=avpriv_snprintf  \
3933                                              vsnprintf=avpriv_vsnprintf
3934             fi
3935         fi
3936         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3937         # 0x601 by default unless something else is set by the user.
3938         # This can easily lead to us detecting functions only present
3939         # in such new versions and producing binaries requiring windows 7.0.
3940         # Therefore explicitly set the default to XP unless the user has
3941         # set something else on the command line.
3942         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3943         # family. For these cases, configure is free to use any functions
3944         # found in the SDK headers by default. (Alternatively, we could force
3945         # _WIN32_WINNT to 0x0602 in that case.)
3946         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3947             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3948 #ifdef WINAPI_FAMILY
3949 #include <winapifamily.h>
3950 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3951 #error not desktop
3952 #endif
3953 #endif
3954 EOF
3955     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3956         eval ${pfx}libc_type=klibc
3957     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3958         eval ${pfx}libc_type=bionic
3959     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3960         eval ${pfx}libc_type=solaris
3961         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3962     else
3963         eval ${pfx}libc_type=default
3964         add_${pfx}cppflags -D_DEFAULT_SOURCE
3965     fi
3966 }
3967
3968 probe_libc
3969 test -n "$libc_type" && enable libc_$libc_type
3970 probe_libc host_
3971 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3972
3973 case $libc_type in
3974     bionic)
3975         add_compat strtod.o strtod=avpriv_strtod
3976         ;;
3977 esac
3978
3979 # hacks for compiler/libc/os combinations
3980
3981 if enabled_all tms470 libc_glibc; then
3982     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3983     add_cppflags -D__USER_LABEL_PREFIX__=
3984     add_cppflags -D__builtin_memset=memset
3985     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3986     add_cflags   -pds=48    # incompatible redefinition of macro
3987 fi
3988
3989 if enabled_all ccc libc_glibc; then
3990     add_ldflags -Wl,-z,now  # calls to libots crash without this
3991 fi
3992
3993 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3994     add_cppflags '-I\$(SRC_PATH)/compat/float'
3995
3996 esc(){
3997     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3998 }
3999
4000 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4001
4002 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4003
4004 set_default $PATHS_LIST
4005 set_default nm
4006
4007 # we need to build at least one lib type
4008 if ! enabled_any static shared; then
4009     cat <<EOF
4010 At least one library type must be built.
4011 Specify --enable-static to build the static libraries or --enable-shared to
4012 build the shared libraries as well. To only build the shared libraries specify
4013 --disable-static in addition to --enable-shared.
4014 EOF
4015     exit 1;
4016 fi
4017
4018 die_license_disabled() {
4019     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4020 }
4021
4022 die_license_disabled gpl libcdio
4023 die_license_disabled gpl libx264
4024 die_license_disabled gpl libx265
4025 die_license_disabled gpl libxavs
4026 die_license_disabled gpl libxvid
4027 die_license_disabled gpl x11grab
4028
4029 die_license_disabled nonfree cuda
4030 die_license_disabled nonfree libfaac
4031 die_license_disabled nonfree libfdk_aac
4032 die_license_disabled nonfree libnpp
4033 die_license_disabled nonfree nvenc
4034 die_license_disabled nonfree openssl
4035
4036 die_license_disabled version3 libopencore_amrnb
4037 die_license_disabled version3 libopencore_amrwb
4038 die_license_disabled version3 libvo_aacenc
4039 die_license_disabled version3 libvo_amrwbenc
4040
4041 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4042
4043 disabled optimizations || check_cflags -fomit-frame-pointer
4044
4045 enable_weak_pic() {
4046     disabled pic && return
4047     enable pic
4048     add_cppflags -DPIC
4049     case "$target_os" in
4050     mingw*|cygwin*)
4051         ;;
4052     *)
4053         add_cflags -fPIC
4054         ;;
4055     esac
4056     add_asflags  -fPIC
4057 }
4058
4059 enabled pic && enable_weak_pic
4060
4061 check_cc <<EOF || die "Symbol mangling check failed."
4062 int ff_extern;
4063 EOF
4064 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4065 extern_prefix=${sym%%ff_extern*}
4066
4067 check_cc <<EOF && enable_weak inline_asm
4068 void foo(void) { __asm__ volatile ("" ::); }
4069 EOF
4070
4071 _restrict=
4072 for restrict_keyword in restrict __restrict__ __restrict; do
4073     check_cc <<EOF && _restrict=$restrict_keyword && break
4074 void foo(char * $restrict_keyword p);
4075 EOF
4076 done
4077
4078 check_cc <<EOF && enable pragma_deprecated
4079 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4080 EOF
4081
4082 check_cc <<EOF && enable attribute_packed
4083 struct { int x; } __attribute__((packed)) x;
4084 EOF
4085
4086 check_cc <<EOF && enable attribute_may_alias
4087 union { int x; } __attribute__((may_alias)) x;
4088 EOF
4089
4090 check_cc <<EOF || die "endian test failed"
4091 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4092 EOF
4093 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4094
4095 check_gas() {
4096     log "check_gas using '$as' as AS"
4097     # :vararg is used on aarch64, arm and ppc altivec
4098     check_as <<EOF || return 1
4099 .macro m n, y:vararg=0
4100 \n: .int \y
4101 .endm
4102 m x
4103 EOF
4104     # .altmacro is only used in arm asm
4105     ! enabled arm || check_as <<EOF || return 1
4106 .altmacro
4107 EOF
4108     enable gnu_as
4109     return 0
4110 }
4111
4112 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4113     nogas=:
4114     enabled_any arm aarch64 && nogas=die
4115     enabled_all ppc altivec && nogas=warn
4116     as_noop=-v
4117
4118     case $as_type in
4119         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4120         gcc)  gaspp_as_type=gas ;;
4121         *)    gaspp_as_type=$as_type ;;
4122     esac
4123
4124     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4125
4126     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4127         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4128
4129     if ! check_gas ; then
4130         as=${gas:=$as}
4131         check_gas || \
4132             $nogas "GNU assembler not found, install/update gas-preprocessor"
4133     fi
4134
4135     check_as <<EOF && enable as_func
4136 .func test
4137 .endfunc
4138 EOF
4139 fi
4140
4141 check_inline_asm inline_asm_labels '"1:\n"'
4142
4143 if enabled aarch64; then
4144     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4145     # internal assembler in clang 3.3 does not support this instruction
4146     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4147     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4148
4149     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4150
4151 elif enabled alpha; then
4152
4153     check_cflags -mieee
4154
4155 elif enabled arm; then
4156
4157     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4158     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4159     enabled thumb && check_cflags -mthumb || check_cflags -marm
4160
4161     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4162         enable vfp_args
4163     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4164         enable vfp_args
4165     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4166         case "${cross_prefix:-$cc}" in
4167             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4168             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4169 __asm__ (".eabi_attribute 28, 1");
4170 int main(void) { return 0; }
4171 EOF
4172         esac
4173         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4174     fi
4175
4176     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4177     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4178     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4179     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4180     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4181     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4182
4183     [ $target_os = linux ] || [ $target_os = android ] ||
4184         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4185             $ARCH_EXT_LIST_ARM
4186
4187     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4188
4189     check_as <<EOF && enable as_dn_directive
4190 ra .dn d0.i16
4191 .unreq ra
4192 EOF
4193
4194     # llvm's integrated assembler supports .object_arch from llvm 3.5
4195     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4196 .object_arch armv4
4197 EOF
4198
4199     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4200
4201 elif enabled mips; then
4202
4203     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4204
4205     # make sure that only an instruction set is enabled
4206     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4207
4208     if enabled mips64; then
4209         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4210             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4211                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4212     else
4213         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4214             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4215                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4216     fi
4217
4218 elif enabled parisc; then
4219
4220     if enabled gcc; then
4221         case $($cc -dumpversion) in
4222             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4223         esac
4224     fi
4225
4226 elif enabled ppc; then
4227
4228     enable local_aligned_8 local_aligned_16
4229
4230     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4231     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4232     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4233     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4234
4235     # AltiVec flags: The FSF version of GCC differs from the Apple version
4236     if enabled altivec; then
4237         check_cflags -maltivec -mabi=altivec &&
4238         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4239         check_cflags -faltivec
4240
4241         # check if our compiler supports Motorola AltiVec C API
4242         check_cc <<EOF || disable altivec
4243 $inc_altivec_h
4244 int main(void) {
4245     vector signed int v1 = (vector signed int) { 0 };
4246     vector signed int v2 = (vector signed int) { 1 };
4247     v1 = vec_add(v1, v2);
4248     return 0;
4249 }
4250 EOF
4251
4252         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4253     fi
4254
4255     if enabled vsx; then
4256         check_cflags -mvsx &&
4257         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4258     fi
4259
4260     if enabled power8; then
4261         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4262     fi
4263
4264 elif enabled x86; then
4265
4266     check_builtin rdtsc    intrin.h   "__rdtsc()"
4267     check_builtin mm_empty mmintrin.h "_mm_empty()"
4268
4269     enable local_aligned_8 local_aligned_16
4270
4271     # check whether EBP is available on x86
4272     # As 'i' is stored on the stack, this program will crash
4273     # if the base pointer is used to access it because the
4274     # base pointer is cleared in the inline assembly code.
4275     check_exec_crash <<EOF && enable ebp_available
4276 volatile int i=0;
4277 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4278 return i;
4279 EOF
4280
4281     # check whether EBX is available on x86
4282     check_inline_asm ebx_available '""::"b"(0)' &&
4283         check_inline_asm ebx_available '"":::"%ebx"'
4284
4285     # check whether xmm clobbers are supported
4286     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4287
4288     # check whether binutils is new enough to compile SSSE3/MMXEXT
4289     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4290     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4291
4292     if ! disabled_any asm mmx yasm; then
4293         if check_cmd $yasmexe --version; then
4294             enabled x86_64 && yasm_extra="-m amd64"
4295             yasm_debug="-g dwarf2"
4296         elif check_cmd nasm -v; then
4297             yasmexe=nasm
4298             yasm_debug="-g -F dwarf"
4299             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4300         fi
4301
4302         YASMFLAGS="-f $objformat $yasm_extra"
4303         enabled pic               && append YASMFLAGS "-DPIC"
4304         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4305         case "$objformat" in
4306             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4307         esac
4308
4309         check_yasm "movbe ecx, [5]" && enable yasm ||
4310             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4311         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4312         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4313         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4314         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4315         check_yasm "CPU amdnop" || disable cpunop
4316     fi
4317
4318     case "$cpu" in
4319         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4320             disable fast_clz
4321         ;;
4322     esac
4323
4324 fi
4325
4326 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4327
4328 check_ldflags -Wl,--as-needed
4329
4330 if check_func dlopen; then
4331     ldl=
4332 elif check_func dlopen -ldl; then
4333     ldl=-ldl
4334 fi
4335
4336 if ! disabled network; then
4337     check_func getaddrinfo $network_extralibs
4338     check_func inet_aton $network_extralibs
4339
4340     check_type netdb.h "struct addrinfo"
4341     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4342     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4343     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4344     check_type poll.h "struct pollfd"
4345     check_type netinet/sctp.h "struct sctp_event_subscribe"
4346     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4347     check_type netinet/in.h "struct sockaddr_in6"
4348     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4349     check_type "sys/types.h sys/socket.h" socklen_t
4350
4351     # Prefer arpa/inet.h over winsock2
4352     if check_header arpa/inet.h ; then
4353         check_func closesocket
4354     elif check_header winsock2.h ; then
4355         check_func_headers winsock2.h closesocket -lws2 &&
4356             network_extralibs="-lws2" ||
4357         { check_func_headers winsock2.h closesocket -lws2_32 &&
4358             network_extralibs="-lws2_32"; } || disable winsock2_h network
4359         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4360
4361         check_type ws2tcpip.h socklen_t
4362         check_type ws2tcpip.h "struct addrinfo"
4363         check_type ws2tcpip.h "struct group_source_req"
4364         check_type ws2tcpip.h "struct ip_mreq_source"
4365         check_type ws2tcpip.h "struct ipv6_mreq"
4366         check_type winsock2.h "struct pollfd"
4367         check_struct winsock2.h "struct sockaddr" sa_len
4368         check_type ws2tcpip.h "struct sockaddr_in6"
4369         check_type ws2tcpip.h "struct sockaddr_storage"
4370     else
4371         disable network
4372     fi
4373 fi
4374
4375 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4376 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4377 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4378 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4379
4380 case "$custom_allocator" in
4381     jemalloc)
4382         # jemalloc by default does not use a prefix
4383         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4384     ;;
4385     tcmalloc)
4386         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4387         malloc_prefix=tc_
4388     ;;
4389 esac
4390
4391 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4392 check_func  ${malloc_prefix}memalign            && enable memalign
4393 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4394
4395 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4396     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4397
4398 check_func  fcntl
4399 check_func  fork
4400 check_func  gethrtime
4401 check_func  getopt
4402 check_func  getrusage
4403 check_func  gettimeofday
4404 check_func  gmtime_r
4405 check_func  isatty
4406 check_func  localtime_r
4407 check_func  mach_absolute_time
4408 check_func  mkstemp
4409 check_func  mmap
4410 check_func  mprotect
4411 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4412 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4413 check_func  sched_getaffinity
4414 check_func  setrlimit
4415 check_func  strerror_r
4416 check_func  sysconf
4417 check_func  sysctl
4418 check_func  usleep
4419
4420 check_func_headers io.h setmode
4421 check_func_headers stdlib.h getenv
4422
4423 check_func_headers windows.h CoTaskMemFree -lole32
4424 check_func_headers windows.h GetProcessAffinityMask
4425 check_func_headers windows.h GetProcessTimes
4426 check_func_headers windows.h GetSystemTimeAsFileTime
4427 check_func_headers windows.h LoadLibrary
4428 check_func_headers windows.h MapViewOfFile
4429 check_func_headers windows.h SetConsoleTextAttribute
4430 check_func_headers windows.h Sleep
4431 check_func_headers windows.h VirtualAlloc
4432 check_struct windows.h "CONDITION_VARIABLE" Ptr
4433
4434 check_header direct.h
4435 check_header dlfcn.h
4436 check_header d3d11.h
4437 check_header dxva.h
4438 check_header dxva2api.h
4439 check_header io.h
4440 check_header mach/mach_time.h
4441 check_header malloc.h
4442 check_header poll.h
4443 check_header sys/mman.h
4444 check_header sys/param.h
4445 check_header sys/resource.h
4446 check_header sys/select.h
4447 check_header sys/time.h
4448 check_header sys/un.h
4449 check_header unistd.h
4450 check_header valgrind/valgrind.h
4451 check_header vdpau/vdpau.h
4452 check_header vdpau/vdpau_x11.h
4453 check_header VideoDecodeAcceleration/VDADecoder.h
4454 check_header windows.h
4455 check_header X11/extensions/XvMClib.h
4456
4457 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4458 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4459 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4460
4461 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4462
4463 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4464 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4465 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4466
4467 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4468
4469 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4470
4471 if ! disabled w32threads && ! enabled pthreads; then
4472     check_func_headers "windows.h process.h" _beginthreadex &&
4473         enable w32threads || disable w32threads
4474 fi
4475
4476 # check for some common methods of building with pthread support
4477 # do this before the optional library checks as some of them require pthreads
4478 if ! disabled pthreads && ! enabled w32threads; then
4479     enable pthreads
4480     if check_func pthread_join -pthread; then
4481         add_cflags -pthread
4482         add_extralibs -pthread
4483     elif check_func pthread_join -pthreads; then
4484         add_cflags -pthreads
4485         add_extralibs -pthreads
4486     elif check_func pthread_join -lpthreadGC2; then
4487         add_extralibs -lpthreadGC2
4488     elif check_lib pthread.h pthread_join -lpthread; then
4489         :
4490     elif ! check_func pthread_join; then
4491         disable pthreads
4492     fi
4493 fi
4494
4495 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4496 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4497
4498 check_lib math.h sin -lm && LIBM="-lm"
4499 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4500
4501 atan2f_args=2
4502 ldexpf_args=2
4503 powf_args=2
4504
4505 for func in $MATH_FUNCS; do
4506     eval check_mathfunc $func \${${func}_args:-1}
4507 done
4508
4509 # these are off by default, so fail if requested and not available
4510 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4511                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4512                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4513 enabled cuda              && check_lib cuda.h cuInit -lcuda
4514 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4515 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4516 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4517 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4518 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4519 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4520 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4521 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4522 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4523                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4524                                done || die "ERROR: libgsm not found"; }
4525 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4526 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4527 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4528 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4529 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4530 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4531 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4532 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4533 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4534 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4535                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4536 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4537 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4538 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4539 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4540 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4541 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4542 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4543 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4544 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4545 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4546 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4547 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4548     enabled libvpx_vp8_decoder && {
4549         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4550             disable libvpx_vp8_decoder;
4551     }
4552     enabled libvpx_vp8_encoder && {
4553         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4554             disable libvpx_vp8_encoder;
4555     }
4556     enabled libvpx_vp9_decoder && {
4557         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4558             disable libvpx_vp9_decoder;
4559     }
4560     enabled libvpx_vp9_encoder && {
4561         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4562             disable libvpx_vp9_encoder;
4563     }
4564     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4565         die "libvpx enabled but no supported decoders found"
4566     fi
4567 }
4568 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4569 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4570 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4571                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4572                                die "ERROR: libx264 version must be >= 0.118."; } &&
4573                              { check_cpp_condition x264.h "X264_MPEG2" &&
4574                                enable libx262; }
4575 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4576                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4577                                die "ERROR: libx265 version must be >= 57."; }
4578 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4579 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4580 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4581                                 { ! enabled cross_compile && {
4582                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4583                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4584                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4585                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4586                                die "ERROR: mmal not found"; }
4587 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4588                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4589                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4590                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4591                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4592                                die "ERROR: openssl not found"; }
4593
4594 if enabled gnutls; then
4595     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4596     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4597 fi
4598
4599 # libdc1394 check
4600 if enabled libdc1394; then
4601     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4602         enable libdc1394_2; } ||
4603     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4604         enable libdc1394_1; } ||
4605     die "ERROR: No version of libdc1394 found "
4606 fi
4607
4608 if enabled nvenc; then
4609     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found.";
4610     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4611     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4612         die "ERROR: NVENC API version 4 or older is not supported";
4613 fi
4614
4615 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4616     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4617     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4618     enable sdl
4619 fi
4620
4621 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4622 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4623
4624 check_header linux/fb.h
4625 check_header linux/videodev2.h
4626 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4627
4628 check_header AVFoundation/AVFoundation.h &&
4629     check_objcflags -fobjc-arc &&
4630     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4631     disable AVFoundation_AVFoundation_h
4632
4633 check_header sys/videoio.h
4634
4635 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4636 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4637 # w32api 3.12 had it defined wrong
4638 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4639
4640 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4641 { check_header dev/bktr/ioctl_meteor.h &&
4642   check_header dev/bktr/ioctl_bt848.h; } ||
4643 { check_header machine/ioctl_meteor.h &&
4644   check_header machine/ioctl_bt848.h; } ||
4645 { check_header dev/video/meteor/ioctl_meteor.h &&
4646   check_header dev/video/bktr/ioctl_bt848.h; } ||
4647 check_header dev/ic/bt8xx.h
4648
4649 check_header sndio.h
4650 check_header sys/soundcard.h
4651 check_header soundcard.h
4652
4653 enabled_any alsa_indev alsa_outdev &&
4654     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4655
4656 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4657     check_func jack_port_get_latency_range -ljack
4658
4659 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4660
4661 if enabled libcdio; then
4662     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4663     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4664     die "ERROR: No usable libcdio/cdparanoia found"
4665 fi
4666
4667 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4668
4669 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4670     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4671         enabled libxcb && die "ERROR: libxcb not found";
4672     } && disable x11grab && enable libxcb
4673
4674     disabled libxcb_shm ||
4675         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4676             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4677         } && check_header sys/shm.h && enable libxcb_shm
4678
4679     disabled libxcb_xfixes ||
4680         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4681             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4682         } && enable libxcb_xfixes
4683
4684     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4685     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4686 fi
4687
4688 if enabled x11grab; then
4689     enabled xlib || die "ERROR: Xlib not found"
4690     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4691     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4692 fi
4693
4694 enabled vaapi &&
4695     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4696     disable vaapi
4697
4698 if enabled vaapi ; then
4699     enabled xlib &&
4700     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4701     enable vaapi_x11
4702
4703     check_lib2 "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4704     enable vaapi_drm
4705 fi
4706
4707 enabled vdpau &&
4708     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4709     disable vdpau
4710
4711 enabled vdpau && enabled xlib &&
4712     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4713     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4714     enable vdpau_x11
4715
4716 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4717
4718 # add some useful compiler flags if supported
4719 check_cflags -Wdeclaration-after-statement
4720 check_cflags -Wall
4721 check_cflags -Wdisabled-optimization
4722 check_cflags -Wpointer-arith
4723 check_cflags -Wredundant-decls
4724 check_cflags -Wwrite-strings
4725 check_cflags -Wtype-limits
4726 check_cflags -Wundef
4727 check_cflags -Wmissing-prototypes
4728 check_cflags -Wstrict-prototypes
4729 enabled extra_warnings && check_cflags -Winline
4730 enabled extra_warnings && check_cflags -Wcast-qual
4731
4732 check_disable_warning(){
4733     warning_flag=-W${1#-Wno-}
4734     test_cflags $warning_flag && add_cflags $1
4735 }
4736
4737 check_disable_warning -Wno-parentheses
4738 check_disable_warning -Wno-switch
4739 check_disable_warning -Wno-format-zero-length
4740 check_disable_warning -Wno-pointer-sign
4741
4742 # add some linker flags
4743 check_ldflags -Wl,--warn-common
4744 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4745 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4746 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4747
4748 # add some strip flags
4749 # -wN '..@*' is more selective than -x, but not available everywhere.
4750 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4751
4752 enabled neon_clobber_test &&
4753     check_ldflags -Wl,--wrap,avcodec_open2              \
4754                   -Wl,--wrap,avcodec_decode_audio4      \
4755                   -Wl,--wrap,avcodec_decode_video2      \
4756                   -Wl,--wrap,avcodec_decode_subtitle2   \
4757                   -Wl,--wrap,avcodec_encode_audio2      \
4758                   -Wl,--wrap,avcodec_encode_video2      \
4759                   -Wl,--wrap,avcodec_encode_subtitle    \
4760                   -Wl,--wrap,avresample_convert ||
4761     disable neon_clobber_test
4762
4763 enabled xmm_clobber_test &&
4764     check_ldflags -Wl,--wrap,avcodec_open2              \
4765                   -Wl,--wrap,avcodec_decode_audio4      \
4766                   -Wl,--wrap,avcodec_decode_video2      \
4767                   -Wl,--wrap,avcodec_decode_subtitle2   \
4768                   -Wl,--wrap,avcodec_encode_audio2      \
4769                   -Wl,--wrap,avcodec_encode_video2      \
4770                   -Wl,--wrap,avcodec_encode_subtitle    \
4771                   -Wl,--wrap,avresample_convert         \
4772                   -Wl,--wrap,sws_scale ||
4773     disable xmm_clobber_test
4774
4775 echo "X { local: *; };" > $TMPV
4776 if test_ldflags -Wl,--version-script,$TMPV; then
4777     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4778 elif test_ldflags -Wl,-M,$TMPV; then
4779     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4780 fi
4781
4782 check_cc <<EOF && enable symver_asm_label
4783 void ff_foo(void) __asm__ ("av_foo@VERSION");
4784 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4785 EOF
4786     check_cc <<EOF && enable symver_gnu_asm
4787 __asm__(".symver ff_foo,av_foo@VERSION");
4788 void ff_foo(void) {}
4789 EOF
4790
4791 if [ -z "$optflags" ]; then
4792     if enabled small; then
4793         optflags=$cflags_size
4794     elif enabled optimizations; then
4795         optflags=$cflags_speed
4796     else
4797         optflags=$cflags_noopt
4798     fi
4799 fi
4800
4801 check_optflags(){
4802     check_cflags "$@"
4803     enabled lto && check_ldflags "$@"
4804 }
4805
4806
4807 if enabled lto; then
4808     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4809     check_cflags  -flto
4810     check_ldflags -flto $cpuflags
4811 fi
4812
4813 check_optflags $optflags
4814 check_optflags -fno-math-errno
4815 check_optflags -fno-signed-zeros
4816
4817 if enabled icc; then
4818     # Just warnings, no remarks
4819     check_cflags -w1
4820     # -wd: Disable following warnings
4821     # 144, 167, 556: -Wno-pointer-sign
4822     # 1292: attribute "foo" ignored
4823     # 1419: external declaration in primary source file
4824     # 10006: ignoring unknown option -fno-signed-zeros
4825     # 10148: ignoring unknown option -Wno-parentheses
4826     # 10156: ignoring option '-W'; no argument required
4827     check_cflags -wd144,167,556,1292,1419,10006,10148,10156
4828     # 11030: Warning unknown option --as-needed
4829     # 10156: ignoring option '-export'; no argument required
4830     check_ldflags -wd10156,11030
4831     # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
4832     enable ebp_available
4833     if enabled x86_32; then
4834         icc_version=$($cc -dumpversion)
4835         test ${icc_version%%.*} -ge 11 &&
4836             check_cflags -falign-stack=maintain-16-byte ||
4837             disable aligned_stack
4838     fi
4839 elif enabled ccc; then
4840