3a3b059304e2d7c5c8d4b79cc9625335ceb9d8ad
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix]
82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
85   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89   --enable-rpath           use rpath when linking programs [USE WITH CARE]
90
91 Licensing options:
92   --enable-gpl             allow use of GPL code, the resulting libs
93                            and binaries will be under GPL [no]
94   --enable-version3        upgrade (L)GPL to version 3 [no]
95   --enable-nonfree         allow use of nonfree code, the resulting libs
96                            and binaries will be unredistributable [no]
97
98 Configuration options:
99   --disable-static         do not build static libraries [no]
100   --enable-shared          build shared libraries [no]
101   --enable-small           optimize for size instead of speed
102   --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
103   --enable-gray            enable full grayscale support (slower color)
104   --disable-swscale-alpha  disable alpha channel support in swscale
105   --disable-all            disable building components, libraries and programs
106
107 Program options:
108   --disable-programs       do not build command line programs
109   --disable-avconv         disable avconv build
110   --disable-avplay         disable avplay build
111   --disable-avprobe        disable avprobe build
112   --disable-avserver       deprecated, does nothing
113
114 Component options:
115   --disable-doc            do not build documentation
116   --disable-avdevice       disable libavdevice build
117   --disable-avcodec        disable libavcodec build
118   --disable-avformat       disable libavformat build
119   --disable-avutil         disable libavutil build
120   --disable-swscale        disable libswscale build
121   --disable-avfilter       disable video filter support [no]
122   --disable-avresample     disable libavresample build [no]
123   --disable-pthreads       disable pthreads [auto]
124   --disable-w32threads     disable Win32 threads [auto]
125   --disable-network        disable network support [no]
126   --disable-dct            disable DCT code
127   --disable-error-resilience disable error resilience code
128   --disable-lsp            disable LSP code
129   --disable-lzo            disable LZO decoder code
130   --disable-mdct           disable MDCT code
131   --disable-rdft           disable RDFT code
132   --disable-fft            disable FFT code
133   --disable-faan           disable floating point AAN (I)DCT code
134
135 Hardware accelerators:
136   --enable-d3d11va         enable D3D11VA code
137   --enable-dxva2           enable DXVA2 code
138   --enable-vaapi           enable VAAPI code
139   --enable-vda             enable VDA code
140   --enable-vdpau           enable VDPAU code
141
142 Individual component options:
143   --disable-everything     disable all components listed below
144   --disable-encoder=NAME   disable encoder NAME
145   --enable-encoder=NAME    enable encoder NAME
146   --disable-encoders       disable all encoders
147   --disable-decoder=NAME   disable decoder NAME
148   --enable-decoder=NAME    enable decoder NAME
149   --disable-decoders       disable all decoders
150   --disable-hwaccel=NAME   disable hwaccel NAME
151   --enable-hwaccel=NAME    enable hwaccel NAME
152   --disable-hwaccels       disable all hwaccels
153   --disable-muxer=NAME     disable muxer NAME
154   --enable-muxer=NAME      enable muxer NAME
155   --disable-muxers         disable all muxers
156   --disable-demuxer=NAME   disable demuxer NAME
157   --enable-demuxer=NAME    enable demuxer NAME
158   --disable-demuxers       disable all demuxers
159   --enable-parser=NAME     enable parser NAME
160   --disable-parser=NAME    disable parser NAME
161   --disable-parsers        disable all parsers
162   --enable-bsf=NAME        enable bitstream filter NAME
163   --disable-bsf=NAME       disable bitstream filter NAME
164   --disable-bsfs           disable all bitstream filters
165   --enable-protocol=NAME   enable protocol NAME
166   --disable-protocol=NAME  disable protocol NAME
167   --disable-protocols      disable all protocols
168   --enable-indev=NAME      enable input device NAME
169   --disable-indev=NAME     disable input device NAME
170   --disable-indevs         disable input devices
171   --enable-outdev=NAME     enable output device NAME
172   --disable-outdev=NAME    disable output device NAME
173   --disable-outdevs        disable output devices
174   --disable-devices        disable all devices
175   --enable-filter=NAME     enable filter NAME
176   --disable-filter=NAME    disable filter NAME
177   --disable-filters        disable all filters
178
179 External library support:
180   --enable-avisynth        enable reading of AviSynth script files [no]
181   --enable-bzlib           enable bzlib [autodetect]
182   --enable-cuda            enable dynamically linked CUDA [no]
183   --enable-frei0r          enable frei0r video filtering
184   --enable-gnutls          enable gnutls [no]
185   --enable-libbs2b         enable bs2b DSP library [no]
186   --enable-libcdio         enable audio CD grabbing with libcdio
187   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
188                            and libraw1394 [no]
189   --enable-libdcadec       enable DCA decoding via libdcadec [no]
190   --enable-libfaac         enable AAC encoding via libfaac [no]
191   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
192   --enable-libfreetype     enable libfreetype [no]
193   --enable-libgsm          enable GSM de/encoding via libgsm [no]
194   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
195   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
196   --enable-libmfx          enable HW acceleration through libmfx
197   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
198   --enable-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     vaapi_encode
1712     vc1dsp
1713     videodsp
1714     vp3dsp
1715     vp56dsp
1716     vp8dsp
1717     wma_freqs
1718     wmv2dsp
1719 "
1720
1721 CMDLINE_SELECT="
1722     $ARCH_EXT_LIST
1723     $CONFIG_LIST
1724     $HAVE_LIST_CMDLINE
1725     $THREADS_LIST
1726     asm
1727     cross_compile
1728     debug
1729     extra_warnings
1730     logging
1731     lto
1732     optimizations
1733     rpath
1734 "
1735
1736 PATHS_LIST="
1737     bindir
1738     datadir
1739     docdir
1740     incdir
1741     libdir
1742     mandir
1743     prefix
1744     shlibdir
1745 "
1746
1747 CMDLINE_SET="
1748     $PATHS_LIST
1749     ar
1750     arch
1751     as
1752     build_suffix
1753     cc
1754     objcc
1755     cpu
1756     cross_prefix
1757     custom_allocator
1758     dep_cc
1759     env
1760     extra_version
1761     host_cc
1762     host_cflags
1763     host_ld
1764     host_ldflags
1765     host_libs
1766     host_os
1767     ld
1768     logfile
1769     malloc_prefix
1770     nm
1771     optflags
1772     pkg_config
1773     pkg_config_flags
1774     random_seed
1775     samples
1776     sysinclude
1777     sysroot
1778     target_exec
1779     target_os
1780     target_path
1781     target_samples
1782     toolchain
1783 "
1784
1785 CMDLINE_APPEND="
1786     extra_cflags
1787     extra_objcflags
1788     host_cppflags
1789 "
1790
1791 # code dependency declarations
1792
1793 # architecture extensions
1794
1795 armv5te_deps="arm"
1796 armv6_deps="arm"
1797 armv6t2_deps="arm"
1798 armv8_deps="aarch64"
1799 neon_deps_any="aarch64 arm"
1800 intrinsics_neon_deps="neon"
1801 vfp_deps_any="aarch64 arm"
1802 vfpv3_deps="vfp"
1803
1804 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1805
1806 altivec_deps="ppc"
1807 ppc4xx_deps="ppc"
1808 vsx_deps="altivec"
1809 power8_deps="vsx"
1810
1811 cpunop_deps="i686"
1812 x86_64_select="i686"
1813 x86_64_suggest="fast_cmov"
1814
1815 amd3dnow_deps="mmx"
1816 amd3dnowext_deps="amd3dnow"
1817 i686_deps="x86"
1818 mmx_deps="x86"
1819 mmxext_deps="mmx"
1820 sse_deps="mmxext"
1821 sse2_deps="sse"
1822 sse3_deps="sse2"
1823 ssse3_deps="sse3"
1824 sse4_deps="ssse3"
1825 sse42_deps="sse4"
1826 avx_deps="sse42"
1827 xop_deps="avx"
1828 fma3_deps="avx"
1829 fma4_deps="avx"
1830 avx2_deps="avx"
1831
1832 mmx_external_deps="yasm"
1833 mmx_inline_deps="inline_asm"
1834 mmx_suggest="mmx_external mmx_inline"
1835
1836 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1837     eval dep=\$${ext}_deps
1838     eval ${ext}_external_deps='"${dep}_external"'
1839     eval ${ext}_inline_deps='"${dep}_inline"'
1840     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1841 done
1842
1843 aligned_stack_if_any="aarch64 ppc x86"
1844 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1845 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1846 fast_unaligned_if_any="aarch64 ppc x86"
1847 simd_align_16_if_any="altivec neon sse"
1848
1849 # system capabilities
1850 symver_if_any="symver_asm_label symver_gnu_asm"
1851 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1852
1853 # threading support
1854 atomics_gcc_if="sync_val_compare_and_swap"
1855 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1856 atomics_win32_if="MemoryBarrier"
1857 atomics_native_if_any="$ATOMICS_LIST"
1858 w32threads_deps="atomics_native"
1859 threads_if_any="$THREADS_LIST"
1860
1861 # subsystems
1862 dct_select="rdft"
1863 dirac_parse_select="golomb"
1864 error_resilience_select="me_cmp"
1865 faandct_deps="faan fdctdsp"
1866 faanidct_deps="faan idctdsp"
1867 h264dsp_select="startcode"
1868 intrax8_select="blockdsp idctdsp"
1869 mdct_select="fft"
1870 rdft_select="fft"
1871 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1872 mpeg_er_select="error_resilience"
1873 mpegaudio_select="mpegaudiodsp"
1874 mpegaudiodsp_select="dct"
1875 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1876 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1877 nvenc_deps_any="dlopen LoadLibrary"
1878 nvenc_extralibs='$ldl'
1879 qsvdec_select="qsv"
1880 qsvenc_select="qsv"
1881 vaapi_encode_deps="vaapi"
1882 vc1dsp_select="h264chroma qpeldsp startcode"
1883
1884 # decoders / encoders
1885 aac_decoder_select="imdct15 mdct sinewin"
1886 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1887 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1888 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1889 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1890 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1891 adpcm_g722_decoder_select="g722dsp"
1892 adpcm_g722_encoder_select="g722dsp"
1893 aic_decoder_select="golomb idctdsp"
1894 alac_encoder_select="lpc"
1895 als_decoder_select="bswapdsp"
1896 amrnb_decoder_select="lsp"
1897 amrwb_decoder_select="lsp"
1898 amv_decoder_select="sp5x_decoder"
1899 ape_decoder_select="bswapdsp"
1900 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1901 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1902 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1903 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1904 atrac1_decoder_select="mdct sinewin"
1905 atrac3_decoder_select="mdct"
1906 atrac3p_decoder_select="mdct sinewin"
1907 bink_decoder_select="blockdsp hpeldsp"
1908 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1909 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1910 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1911 cllc_decoder_select="bswapdsp"
1912 comfortnoise_encoder_select="lpc"
1913 cook_decoder_select="audiodsp mdct sinewin"
1914 cscd_decoder_select="lzo"
1915 cscd_decoder_suggest="zlib"
1916 dca_decoder_select="fmtconvert mdct"
1917 dds_decoder_select="texturedsp"
1918 dnxhd_decoder_select="blockdsp idctdsp"
1919 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1920 dvvideo_decoder_select="dvprofile idctdsp"
1921 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1922 dxa_decoder_deps="zlib"
1923 dxv_decoder_select="lzf texturedsp"
1924 eac3_decoder_select="ac3_decoder"
1925 eac3_encoder_select="ac3_encoder"
1926 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1927 eatgq_decoder_select="aandcttables idctdsp"
1928 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1929 exr_decoder_deps="zlib"
1930 ffv1_decoder_select="golomb rangecoder"
1931 ffv1_encoder_select="rangecoder"
1932 ffvhuff_decoder_select="huffyuv_decoder"
1933 ffvhuff_encoder_select="huffyuv_encoder"
1934 fic_decoder_select="golomb"
1935 flac_decoder_select="flacdsp golomb"
1936 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1937 flashsv_decoder_deps="zlib"
1938 flashsv_encoder_deps="zlib"
1939 flashsv2_decoder_deps="zlib"
1940 flv_decoder_select="h263_decoder"
1941 flv_encoder_select="h263_encoder"
1942 fourxm_decoder_select="blockdsp bswapdsp"
1943 fraps_decoder_select="bswapdsp huffman"
1944 g2m_decoder_deps="zlib"
1945 g2m_decoder_select="blockdsp idctdsp jpegtables"
1946 h261_decoder_select="mpeg_er mpegvideo"
1947 h261_encoder_select="aandcttables mpegvideoenc"
1948 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1949 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1950 h263i_decoder_select="h263_decoder"
1951 h263p_encoder_select="h263_encoder"
1952 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
1953 h264_decoder_suggest="error_resilience"
1954 h264_nvenc_encoder_deps="nvenc"
1955 h264_qsv_decoder_deps="libmfx"
1956 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1957 h264_qsv_encoder_deps="libmfx"
1958 h264_qsv_encoder_select="qsvenc"
1959 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
1960 h264_vaapi_encoder_select="vaapi_encode golomb"
1961 hap_decoder_select="snappy texturedsp"
1962 hap_encoder_deps="libsnappy"
1963 hap_encoder_select="texturedspenc"
1964 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1965 hevc_nvenc_encoder_deps="nvenc"
1966 hevc_qsv_encoder_deps="libmfx"
1967 hevc_qsv_decoder_deps="libmfx"
1968 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1969 hevc_qsv_encoder_select="qsvenc"
1970 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
1971 hevc_vaapi_encoder_select="vaapi_encode golomb"
1972 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1973 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1974 iac_decoder_select="imc_decoder"
1975 imc_decoder_select="bswapdsp fft mdct sinewin"
1976 indeo3_decoder_select="hpeldsp"
1977 indeo4_decoder_select="ividsp"
1978 indeo5_decoder_select="ividsp"
1979 interplay_video_decoder_select="hpeldsp"
1980 jpegls_decoder_select="golomb mjpeg_decoder"
1981 jpegls_encoder_select="golomb"
1982 jv_decoder_select="blockdsp"
1983 lagarith_decoder_select="huffyuvdsp"
1984 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1985 loco_decoder_select="golomb"
1986 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1987 metasound_decoder_select="lsp mdct sinewin"
1988 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1989 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1990 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1991 mjpegb_decoder_select="mjpeg_decoder"
1992 mlp_decoder_select="mlp_parser"
1993 motionpixels_decoder_select="bswapdsp"
1994 mp1_decoder_select="mpegaudio"
1995 mp1float_decoder_select="mpegaudio"
1996 mp2_decoder_select="mpegaudio"
1997 mp2float_decoder_select="mpegaudio"
1998 mp3_decoder_select="mpegaudio"
1999 mp3adu_decoder_select="mpegaudio"
2000 mp3adufloat_decoder_select="mpegaudio"
2001 mp3float_decoder_select="mpegaudio"
2002 mp3on4_decoder_select="mpegaudio"
2003 mp3on4float_decoder_select="mpegaudio"
2004 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2005 mpc8_decoder_select="mpegaudiodsp"
2006 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2007 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2008 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2009 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2010 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2011 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2012 mpeg2_qsv_decoder_deps="libmfx"
2013 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2014 mpeg2_qsv_encoder_deps="libmfx"
2015 mpeg2_qsv_encoder_select="qsvenc"
2016 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2017 mpeg4_encoder_select="h263_encoder"
2018 msa1_decoder_select="mss34dsp"
2019 msmpeg4v1_decoder_select="h263_decoder"
2020 msmpeg4v2_decoder_select="h263_decoder"
2021 msmpeg4v2_encoder_select="h263_encoder"
2022 msmpeg4v3_decoder_select="h263_decoder"
2023 msmpeg4v3_encoder_select="h263_encoder"
2024 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2025 mts2_decoder_select="mss34dsp"
2026 mxpeg_decoder_select="mjpeg_decoder"
2027 nellymoser_decoder_select="mdct sinewin"
2028 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2029 nuv_decoder_select="idctdsp lzo"
2030 nvenc_h264_encoder_deps="nvenc"
2031 nvenc_hevc_encoder_deps="nvenc"
2032 on2avc_decoder_select="mdct"
2033 opus_decoder_deps="avresample"
2034 opus_decoder_select="imdct15"
2035 png_decoder_deps="zlib"
2036 png_encoder_deps="zlib"
2037 png_encoder_select="huffyuvencdsp"
2038 prores_decoder_select="idctdsp"
2039 prores_encoder_select="fdctdsp"
2040 qcelp_decoder_select="lsp"
2041 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2042 ra_144_encoder_select="audio_frame_queue lpc"
2043 ralf_decoder_select="golomb"
2044 rscc_decoder_deps="zlib"
2045 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2046 rv10_encoder_select="h263_encoder"
2047 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2048 rv20_encoder_select="h263_encoder"
2049 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2050 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2051 screenpresso_decoder_deps="zlib"
2052 shorten_decoder_select="golomb"
2053 sipr_decoder_select="lsp"
2054 sp5x_decoder_select="mjpeg_decoder"
2055 svq1_decoder_select="hpeldsp"
2056 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2057 svq3_decoder_select="golomb h264dsp h264pred hpeldsp tpeldsp videodsp"
2058 svq3_decoder_suggest="zlib"
2059 tak_decoder_select="audiodsp"
2060 tdsc_decoder_deps="zlib"
2061 tdsc_decoder_select="mjpeg_decoder"
2062 theora_decoder_select="vp3_decoder"
2063 thp_decoder_select="mjpeg_decoder"
2064 tiff_decoder_suggest="zlib"
2065 tiff_encoder_suggest="zlib"
2066 truehd_decoder_select="mlp_decoder"
2067 truemotion2_decoder_select="bswapdsp"
2068 truespeech_decoder_select="bswapdsp"
2069 tscc_decoder_deps="zlib"
2070 txd_decoder_select="texturedsp"
2071 twinvq_decoder_select="mdct lsp sinewin"
2072 utvideo_decoder_select="bswapdsp"
2073 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2074 vble_decoder_select="huffyuvdsp"
2075 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2076 vc1image_decoder_select="vc1_decoder"
2077 vorbis_decoder_select="mdct"
2078 vorbis_encoder_select="mdct"
2079 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2080 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2081 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2082 vp6a_decoder_select="vp6_decoder"
2083 vp6f_decoder_select="vp6_decoder"
2084 vp7_decoder_select="h264pred videodsp vp8dsp"
2085 vp8_decoder_select="h264pred videodsp vp8dsp"
2086 vp9_decoder_select="videodsp"
2087 webp_decoder_select="vp8_decoder"
2088 wmapro_decoder_select="mdct sinewin wma_freqs"
2089 wmav1_decoder_select="mdct sinewin wma_freqs"
2090 wmav1_encoder_select="mdct sinewin wma_freqs"
2091 wmav2_decoder_select="mdct sinewin wma_freqs"
2092 wmav2_encoder_select="mdct sinewin wma_freqs"
2093 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2094 wmv1_decoder_select="h263_decoder"
2095 wmv1_encoder_select="h263_encoder"
2096 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2097 wmv2_encoder_select="h263_encoder wmv2dsp"
2098 wmv3_decoder_select="vc1_decoder"
2099 wmv3image_decoder_select="wmv3_decoder"
2100 zerocodec_decoder_deps="zlib"
2101 zlib_decoder_deps="zlib"
2102 zlib_encoder_deps="zlib"
2103 zmbv_decoder_deps="zlib"
2104 zmbv_encoder_deps="zlib"
2105
2106 # hardware accelerators
2107 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2108 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2109 vaapi_deps="va_va_h"
2110 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2111 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2112 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2113
2114 h263_vaapi_hwaccel_deps="vaapi"
2115 h263_vaapi_hwaccel_select="h263_decoder"
2116 h264_d3d11va_hwaccel_deps="d3d11va"
2117 h264_d3d11va_hwaccel_select="h264_decoder"
2118 h264_dxva2_hwaccel_deps="dxva2"
2119 h264_dxva2_hwaccel_select="h264_decoder"
2120 h264_mmal_decoder_deps="mmal"
2121 h264_mmal_hwaccel_deps="mmal"
2122 h264_mmal_decoder_select="h264_decoder"
2123 h264_mmal_encoder_deps="mmal"
2124 h264_qsv_hwaccel_deps="libmfx"
2125 h264_vaapi_hwaccel_deps="vaapi"
2126 h264_vaapi_hwaccel_select="h264_decoder"
2127 h264_vda_hwaccel_deps="vda"
2128 h264_vda_hwaccel_select="h264_decoder"
2129 h264_vda_old_hwaccel_deps="vda"
2130 h264_vda_old_hwaccel_select="h264_decoder"
2131 h264_vdpau_hwaccel_deps="vdpau"
2132 h264_vdpau_hwaccel_select="h264_decoder"
2133 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2134 hevc_d3d11va_hwaccel_select="hevc_decoder"
2135 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2136 hevc_dxva2_hwaccel_select="hevc_decoder"
2137 hevc_qsv_hwaccel_deps="libmfx"
2138 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2139 hevc_vdpau_hwaccel_select="hevc_decoder"
2140 mpeg1_vdpau_hwaccel_deps="vdpau"
2141 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2142 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2143 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2144 mpeg2_dxva2_hwaccel_deps="dxva2"
2145 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2146 mpeg2_qsv_hwaccel_deps="libmfx"
2147 mpeg2_vaapi_hwaccel_deps="vaapi"
2148 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2149 mpeg2_vdpau_hwaccel_deps="vdpau"
2150 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2151 mpeg4_vaapi_hwaccel_deps="vaapi"
2152 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2153 mpeg4_vdpau_hwaccel_deps="vdpau"
2154 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2155 vc1_d3d11va_hwaccel_deps="d3d11va"
2156 vc1_d3d11va_hwaccel_select="vc1_decoder"
2157 vc1_dxva2_hwaccel_deps="dxva2"
2158 vc1_dxva2_hwaccel_select="vc1_decoder"
2159 vc1_vaapi_hwaccel_deps="vaapi"
2160 vc1_vaapi_hwaccel_select="vc1_decoder"
2161 vc1_vdpau_hwaccel_deps="vdpau"
2162 vc1_vdpau_hwaccel_select="vc1_decoder"
2163 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2164 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2165 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2166 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2167
2168 # parsers
2169 h264_parser_select="h264_decoder"
2170 hevc_parser_select="golomb"
2171 mpegvideo_parser_select="mpegvideo"
2172 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2173 vc1_parser_select="vc1dsp"
2174
2175 # bitstream_filters
2176 mjpeg2jpeg_bsf_select="jpegtables"
2177
2178 # external libraries
2179 libdcadec_decoder_deps="libdcadec"
2180 libfaac_encoder_deps="libfaac"
2181 libfaac_encoder_select="audio_frame_queue"
2182 libfdk_aac_decoder_deps="libfdk_aac"
2183 libfdk_aac_encoder_deps="libfdk_aac"
2184 libfdk_aac_encoder_select="audio_frame_queue"
2185 libgsm_decoder_deps="libgsm"
2186 libgsm_encoder_deps="libgsm"
2187 libgsm_ms_decoder_deps="libgsm"
2188 libgsm_ms_encoder_deps="libgsm"
2189 libilbc_decoder_deps="libilbc"
2190 libilbc_encoder_deps="libilbc"
2191 libkvazaar_encoder_deps="libkvazaar"
2192 libmp3lame_encoder_deps="libmp3lame"
2193 libmp3lame_encoder_select="audio_frame_queue"
2194 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2195 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2196 libopencore_amrnb_encoder_select="audio_frame_queue"
2197 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2198 libopenh264_encoder_deps="libopenh264"
2199 libopenjpeg_decoder_deps="libopenjpeg"
2200 libopenjpeg_encoder_deps="libopenjpeg"
2201 libopus_decoder_deps="libopus"
2202 libopus_encoder_deps="libopus"
2203 libopus_encoder_select="audio_frame_queue"
2204 libschroedinger_decoder_deps="libschroedinger"
2205 libschroedinger_encoder_deps="libschroedinger"
2206 libspeex_decoder_deps="libspeex"
2207 libspeex_encoder_deps="libspeex"
2208 libspeex_encoder_select="audio_frame_queue"
2209 libtheora_encoder_deps="libtheora"
2210 libtwolame_encoder_deps="libtwolame"
2211 libvo_aacenc_encoder_deps="libvo_aacenc"
2212 libvo_aacenc_encoder_select="audio_frame_queue"
2213 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2214 libvorbis_encoder_deps="libvorbis"
2215 libvorbis_encoder_select="audio_frame_queue"
2216 libvpx_vp8_decoder_deps="libvpx"
2217 libvpx_vp8_encoder_deps="libvpx"
2218 libvpx_vp9_decoder_deps="libvpx"
2219 libvpx_vp9_encoder_deps="libvpx"
2220 libwavpack_encoder_deps="libwavpack"
2221 libwebp_encoder_deps="libwebp"
2222 libx262_encoder_deps="libx262"
2223 libx264_encoder_deps="libx264"
2224 libx265_encoder_deps="libx265"
2225 libxavs_encoder_deps="libxavs"
2226 libxvid_encoder_deps="libxvid"
2227
2228 # demuxers / muxers
2229 ac3_demuxer_select="ac3_parser"
2230 asf_demuxer_select="riffdec"
2231 asf_muxer_select="riffenc"
2232 asf_stream_muxer_select="asf_muxer"
2233 avi_demuxer_select="iso_media riffdec"
2234 avi_muxer_select="riffenc"
2235 avisynth_demuxer_deps="avisynth"
2236 avisynth_demuxer_select="riffdec"
2237 caf_demuxer_select="iso_media riffdec"
2238 dash_muxer_select="mp4_muxer"
2239 dirac_demuxer_select="dirac_parser"
2240 dv_demuxer_select="dvprofile"
2241 dv_muxer_select="dvprofile"
2242 dxa_demuxer_select="riffdec"
2243 eac3_demuxer_select="ac3_parser"
2244 f4v_muxer_select="mov_muxer"
2245 flac_demuxer_select="flac_parser"
2246 hds_muxer_select="flv_muxer"
2247 hls_muxer_select="mpegts_muxer"
2248 ipod_muxer_select="mov_muxer"
2249 ismv_muxer_select="mov_muxer"
2250 matroska_audio_muxer_select="matroska_muxer"
2251 matroska_demuxer_select="iso_media riffdec"
2252 matroska_demuxer_suggest="bzlib lzo zlib"
2253 matroska_muxer_select="iso_media riffenc"
2254 mmf_muxer_select="riffenc"
2255 mov_demuxer_select="iso_media riffdec"
2256 mov_demuxer_suggest="zlib"
2257 mov_muxer_select="iso_media riffenc rtpenc_chain"
2258 mp3_demuxer_select="mpegaudio_parser"
2259 mp4_muxer_select="mov_muxer"
2260 mpegts_demuxer_select="iso_media"
2261 mpegts_muxer_select="adts_muxer latm_muxer"
2262 mpegtsraw_demuxer_select="mpegts_demuxer"
2263 mxf_d10_muxer_select="mxf_muxer"
2264 nut_muxer_select="riffenc"
2265 nuv_demuxer_select="riffdec"
2266 oga_muxer_select="ogg_muxer"
2267 ogg_demuxer_select="dirac_parse"
2268 opus_muxer_select="ogg_muxer"
2269 psp_muxer_select="mov_muxer"
2270 rtp_demuxer_select="sdp_demuxer"
2271 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2272 rtsp_demuxer_select="http_protocol rtpdec"
2273 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2274 sap_demuxer_select="sdp_demuxer"
2275 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2276 sdp_demuxer_select="rtpdec"
2277 smoothstreaming_muxer_select="ismv_muxer"
2278 spdif_muxer_select="aac_parser"
2279 spx_muxer_select="ogg_muxer"
2280 swf_demuxer_suggest="zlib"
2281 tak_demuxer_select="tak_parser"
2282 tg2_muxer_select="mov_muxer"
2283 tgp_muxer_select="mov_muxer"
2284 w64_demuxer_select="wav_demuxer"
2285 wav_demuxer_select="riffdec"
2286 wav_muxer_select="riffenc"
2287 webm_muxer_select="iso_media riffenc"
2288 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2289 wtv_demuxer_select="mpegts_demuxer riffdec"
2290 xmv_demuxer_select="riffdec"
2291 xwma_demuxer_select="riffdec"
2292
2293 # indevs / outdevs
2294 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2295 alsa_outdev_deps="alsa_asoundlib_h"
2296 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2297 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2298 dv1394_indev_deps="dv1394"
2299 dv1394_indev_select="dv_demuxer"
2300 fbdev_indev_deps="linux_fb_h"
2301 jack_indev_deps="jack_jack_h pthreads"
2302 libcdio_indev_deps="libcdio"
2303 libdc1394_indev_deps="libdc1394"
2304 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2305 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2306 pulse_indev_deps="libpulse"
2307 sndio_indev_deps="sndio_h"
2308 sndio_outdev_deps="sndio_h"
2309 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2310 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2311 vfwcap_indev_extralibs="-lavicap32"
2312 x11grab_indev_deps="x11grab"
2313 x11grab_xcb_indev_deps="libxcb"
2314
2315 # protocols
2316 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2317 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2318 ffrtmpcrypt_protocol_select="tcp_protocol"
2319 ffrtmphttp_protocol_deps="!librtmp_protocol"
2320 ffrtmphttp_protocol_select="http_protocol"
2321 gopher_protocol_select="network"
2322 http_protocol_select="tcp_protocol"
2323 httpproxy_protocol_select="tcp_protocol"
2324 https_protocol_select="tls_protocol"
2325 icecast_protocol_select="http_protocol"
2326 librtmp_protocol_deps="librtmp"
2327 librtmpe_protocol_deps="librtmp"
2328 librtmps_protocol_deps="librtmp"
2329 librtmpt_protocol_deps="librtmp"
2330 librtmpte_protocol_deps="librtmp"
2331 mmsh_protocol_select="http_protocol"
2332 mmst_protocol_select="network"
2333 rtmp_protocol_deps="!librtmp_protocol"
2334 rtmp_protocol_select="tcp_protocol"
2335 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2336 rtmps_protocol_deps="!librtmp_protocol"
2337 rtmps_protocol_select="tls_protocol"
2338 rtmpt_protocol_select="ffrtmphttp_protocol"
2339 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2340 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2341 rtp_protocol_select="udp_protocol"
2342 sctp_protocol_deps="struct_sctp_event_subscribe"
2343 sctp_protocol_select="network"
2344 srtp_protocol_select="rtp_protocol srtp"
2345 tcp_protocol_select="network"
2346 tls_gnutls_protocol_deps="gnutls"
2347 tls_gnutls_protocol_select="tcp_protocol"
2348 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2349 tls_openssl_protocol_select="tcp_protocol"
2350 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2351 udp_protocol_select="network"
2352 unix_protocol_deps="sys_un_h"
2353 unix_protocol_select="network"
2354
2355 # filters
2356 blackframe_filter_deps="gpl"
2357 boxblur_filter_deps="gpl"
2358 bs2b_filter_deps="libbs2b"
2359 cropdetect_filter_deps="gpl"
2360 delogo_filter_deps="gpl"
2361 drawtext_filter_deps="libfreetype"
2362 frei0r_filter_deps="frei0r dlopen"
2363 frei0r_filter_extralibs='$ldl'
2364 frei0r_src_filter_deps="frei0r dlopen"
2365 frei0r_src_filter_extralibs='$ldl'
2366 hqdn3d_filter_deps="gpl"
2367 hwupload_cuda_filter_deps="cuda"
2368 interlace_filter_deps="gpl"
2369 ocv_filter_deps="libopencv"
2370 resample_filter_deps="avresample"
2371 scale_filter_deps="swscale"
2372 scale_npp_filter_deps="cuda libnpp"
2373 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2374
2375 # examples
2376 avcodec_example_deps="avcodec avutil"
2377 filter_audio_example_deps="avfilter avutil"
2378 metadata_example_deps="avformat avutil"
2379 output_example_deps="avcodec avformat avutil swscale"
2380 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2381 transcode_aac_example_deps="avcodec avformat avresample"
2382
2383 # libraries, in linking order
2384 avcodec_deps="avutil"
2385 avdevice_deps="avformat avcodec avutil"
2386 avfilter_deps="avutil"
2387 avformat_deps="avcodec avutil"
2388 avresample_deps="avutil"
2389 swscale_deps="avutil"
2390
2391 # programs
2392 avconv_deps="avcodec avfilter avformat avresample swscale"
2393 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2394                fps_filter null_filter resample_filter scale_filter
2395                setpts_filter trim_filter"
2396 avplay_deps="avcodec avfilter avformat avresample sdl"
2397 avplay_libs='$sdl_libs'
2398 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2399 avprobe_deps="avcodec avformat"
2400
2401 # documentation
2402 pod2man_deps="doc"
2403 texi2html_deps="doc"
2404
2405 # default parameters
2406
2407 logfile="config.log"
2408
2409 # installation paths
2410 prefix_default="/usr/local"
2411 bindir_default='${prefix}/bin'
2412 datadir_default='${prefix}/share/avconv'
2413 docdir_default='${prefix}/share/doc/libav'
2414 incdir_default='${prefix}/include'
2415 libdir_default='${prefix}/lib'
2416 mandir_default='${prefix}/share/man'
2417 shlibdir_default="$libdir_default"
2418
2419 # toolchain
2420 ar_default="ar"
2421 cc_default="gcc"
2422 host_cc_default="gcc"
2423 cp_f="cp -f"
2424 ln_s="ln -s -f"
2425 nm_default="nm -g"
2426 objformat="elf"
2427 pkg_config_default=pkg-config
2428 ranlib="ranlib"
2429 strip="strip"
2430 yasmexe="yasm"
2431
2432 # machine
2433 arch_default=$(uname -m)
2434 cpu="generic"
2435 intrinsics="none"
2436
2437 # OS
2438 target_os_default=$(tolower $(uname -s))
2439 host_os=$target_os_default
2440
2441 # configurable options
2442 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2443
2444 enable asm
2445 enable debug
2446 enable doc
2447 enable faan faandct faanidct
2448 enable optimizations
2449 enable safe_bitstream_reader
2450 enable static
2451 enable swscale_alpha
2452 enable valgrind_backtrace
2453
2454 # By default, enable only those hwaccels that have no external dependencies.
2455 enable d3d11va dxva2 vda vdpau
2456
2457 # build settings
2458 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2459 LIBPREF="lib"
2460 LIBSUF=".a"
2461 FULLNAME='$(NAME)$(BUILDSUF)'
2462 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2463 SLIBPREF="lib"
2464 SLIBSUF=".so"
2465 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2466 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2467 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2468 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2469 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2470 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2471
2472 asflags_filter=echo
2473 cflags_filter=echo
2474 ldflags_filter=echo
2475
2476 AS_C='-c'
2477 AS_O='-o $@'
2478 CC_C='-c'
2479 CC_E='-E -o $@'
2480 CC_O='-o $@'
2481 OBJCC_C='-c'
2482 OBJCC_E='-E -o $@'
2483 OBJCC_O='-o $@'
2484 LD_O='-o $@'
2485 LD_LIB='-l%'
2486 LD_PATH='-L'
2487 HOSTCC_C='-c'
2488 HOSTCC_E='-E -o $@'
2489 HOSTCC_O='-o $@'
2490 HOSTLD_O='-o $@'
2491
2492 host_libs='-lm'
2493 host_cflags_filter=echo
2494 host_ldflags_filter=echo
2495
2496 target_path='$(CURDIR)'
2497
2498 # since the object filename is not given with the -MM flag, the compiler
2499 # is only able to print the basename, and we must add the path ourselves
2500 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2501 DEPFLAGS='-MM'
2502
2503 # find source path
2504 if test -f configure; then
2505     source_path=.
2506 else
2507     source_path=$(cd $(dirname "$0"); pwd)
2508     echo "$source_path" | grep -q '[[:blank:]]' &&
2509         die "Out of tree builds are impossible with whitespace in source path."
2510     test -e "$source_path/config.h" &&
2511         die "Out of tree builds are impossible with config.h in source dir."
2512 fi
2513
2514 for v in "$@"; do
2515     r=${v#*=}
2516     l=${v%"$r"}
2517     r=$(sh_quote "$r")
2518     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2519 done
2520
2521 find_things(){
2522     thing=$1
2523     pattern=$2
2524     file=$source_path/$3
2525     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2526 }
2527
2528 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2529 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2530 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2531 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2532 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2533 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2534 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2535 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2536 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2537
2538 find_things_extern(){
2539     thing=$1
2540     pattern=$2
2541     file=$source_path/$3
2542     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2543 }
2544
2545 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2546 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2547
2548 ALL_COMPONENTS="
2549     $BSF_LIST
2550     $DECODER_LIST
2551     $DEMUXER_LIST
2552     $ENCODER_LIST
2553     $FILTER_LIST
2554     $HWACCEL_LIST
2555     $INDEV_LIST
2556     $MUXER_LIST
2557     $OUTDEV_LIST
2558     $PARSER_LIST
2559     $PROTOCOL_LIST
2560 "
2561
2562 for n in $COMPONENT_LIST; do
2563     v=$(toupper ${n%s})_LIST
2564     eval enable \$$v
2565     eval ${n}_if_any="\$$v"
2566 done
2567
2568 enable $ARCH_EXT_LIST
2569
2570 die_unknown(){
2571     echo "Unknown option \"$1\"."
2572     echo "See $0 --help for available options."
2573     exit 1
2574 }
2575
2576 print_3_columns() {
2577     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2578 }
2579
2580 show_list() {
2581     suffix=_$1
2582     shift
2583     echo $* | sed s/$suffix//g | print_3_columns
2584     exit 0
2585 }
2586
2587 rand_list(){
2588     IFS=', '
2589     set -- $*
2590     unset IFS
2591     for thing; do
2592         comp=${thing%:*}
2593         prob=${thing#$comp}
2594         prob=${prob#:}
2595         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2596         echo "prob ${prob:-0.5}"
2597         printf '%s\n' $comp
2598     done
2599 }
2600
2601 do_random(){
2602     action=$1
2603     shift
2604     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2605     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2606 }
2607
2608 for opt do
2609     optval="${opt#*=}"
2610     case "$opt" in
2611         --extra-ldflags=*)
2612             add_ldflags $optval
2613         ;;
2614         --extra-ldexeflags=*)
2615             add_ldexeflags $optval
2616         ;;
2617         --extra-libs=*)
2618             add_extralibs $optval
2619         ;;
2620         --disable-devices)
2621             disable $INDEV_LIST $OUTDEV_LIST
2622         ;;
2623         --enable-debug=*)
2624             debuglevel="$optval"
2625         ;;
2626         --disable-programs)
2627             disable $PROGRAM_LIST
2628         ;;
2629         --disable-everything)
2630             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2631         ;;
2632         --disable-all)
2633             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2634             disable $LIBRARY_LIST $PROGRAM_LIST doc
2635         ;;
2636         --enable-random|--disable-random)
2637             action=${opt%%-random}
2638             do_random ${action#--} $COMPONENT_LIST
2639         ;;
2640         --enable-random=*|--disable-random=*)
2641             action=${opt%%-random=*}
2642             do_random ${action#--} $optval
2643         ;;
2644         --enable-*=*|--disable-*=*)
2645             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2646             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2647             eval list=\$$(toupper $thing)_LIST
2648             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2649             $action $(filter "$name" $list)
2650         ;;
2651         --enable-avserver|--disable-avserver*)
2652             warn "avserver has been removed, the ${opt} option is only"\
2653                  "provided for compatibility and will be removed in the future"
2654         ;;
2655         --enable-?*|--disable-?*)
2656             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2657             if is_in $option $COMPONENT_LIST; then
2658                 test $action = disable && action=unset
2659                 eval $action \$$(toupper ${option%s})_LIST
2660             elif is_in $option $CMDLINE_SELECT; then
2661                 $action $option
2662             else
2663                 die_unknown $opt
2664             fi
2665         ;;
2666         --list-*)
2667             NAME="${opt#--list-}"
2668             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2669             NAME=${NAME%s}
2670             eval show_list $NAME \$$(toupper $NAME)_LIST
2671         ;;
2672         --help|-h) show_help
2673         ;;
2674         *)
2675             optname="${opt%%=*}"
2676             optname="${optname#--}"
2677             optname=$(echo "$optname" | sed 's/-/_/g')
2678             if is_in $optname $CMDLINE_SET; then
2679                 eval $optname='$optval'
2680             elif is_in $optname $CMDLINE_APPEND; then
2681                 append $optname "$optval"
2682             else
2683                 die_unknown $opt
2684             fi
2685         ;;
2686     esac
2687 done
2688
2689 for e in $env; do
2690     eval "export $e"
2691 done
2692
2693 disabled logging && logfile=/dev/null
2694
2695 # Disable all the library-specific components if the library itself
2696 # is disabled, see AVCODEC_LIST and following _LIST variables.
2697
2698 disable_components(){
2699     disabled ${1} && disable $(
2700         eval components="\$$(toupper ${1})_COMPONENTS"
2701         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2702     )
2703 }
2704
2705 map 'disable_components $v' $LIBRARY_LIST
2706
2707 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2708 set >> $logfile
2709
2710 case "$toolchain" in
2711     *-asan)
2712         cc_default="${toolchain%-asan}"
2713         add_cflags  -fsanitize=address
2714         add_ldflags -fsanitize=address
2715     ;;
2716     *-msan)
2717         cc_default="${toolchain%-msan}"
2718         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2719         add_ldflags -fsanitize=memory
2720     ;;
2721     *-tsan)
2722         cc_default="${toolchain%-tsan}"
2723         add_cflags  -fsanitize=thread -pie
2724         add_ldflags -fsanitize=thread -pie
2725         case "$toolchain" in
2726             gcc-tsan)
2727                 add_cflags  -fPIC
2728                 add_ldflags -fPIC
2729                 ;;
2730         esac
2731     ;;
2732     *-usan)
2733         cc_default="${toolchain%-usan}"
2734         add_cflags  -fsanitize=undefined
2735         add_ldflags -fsanitize=undefined
2736         case "$toolchain" in
2737             clang-usan)
2738                 add_cflags -O1
2739                 ;;
2740         esac
2741     ;;
2742     valgrind-*)
2743         target_exec_default="valgrind"
2744         case "$toolchain" in
2745             valgrind-massif)
2746                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2747                 ;;
2748             valgrind-memcheck)
2749                 target_exec_args="--track-origins=yes --leak-check=full"
2750                 ;;
2751         esac
2752     ;;
2753     msvc)
2754         # Check whether the current MSVC version needs the C99 converter.
2755         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2756         # support enough of C99 to build libav. Default to the new
2757         # behaviour if the regexp was unable to match anything, since this
2758         # successfully parses the version number of existing supported
2759         # versions that require the converter (MSVC 2010 and 2012).
2760         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2761         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2762             cc_default="cl"
2763         else
2764             cc_default="c99wrap cl"
2765         fi
2766         ld_default="$source_path/compat/windows/mslink"
2767         nm_default="dumpbin -symbols"
2768         ar_default="lib"
2769         case "$arch" in
2770         arm*)
2771             as_default="armasm"
2772             ;;
2773         esac
2774         target_os_default="win32"
2775         # Use a relative path for TMPDIR. This makes sure all the
2776         # ffconf temp files are written with a relative path, avoiding
2777         # issues with msys/win32 path conversion for MSVC parameters
2778         # such as -Fo<file> or -out:<file>.
2779         TMPDIR=.
2780     ;;
2781     icl)
2782         cc_default="icl"
2783         ld_default="xilink"
2784         nm_default="dumpbin -symbols"
2785         ar_default="xilib"
2786         target_os_default="win32"
2787         TMPDIR=.
2788     ;;
2789     gcov)
2790         add_cflags  -fprofile-arcs -ftest-coverage
2791         add_ldflags -fprofile-arcs -ftest-coverage
2792     ;;
2793     llvm-cov)
2794         add_cflags -fprofile-arcs -ftest-coverage
2795         add_ldflags --coverage
2796     ;;
2797     hardened)
2798         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2799         add_cflags   -fno-strict-overflow -fstack-protector-all
2800         add_ldflags  -Wl,-z,relro -Wl,-z,now
2801     ;;
2802     ?*)
2803         die "Unknown toolchain $toolchain"
2804     ;;
2805 esac
2806
2807 test -n "$cross_prefix" && enable cross_compile
2808
2809 if enabled cross_compile; then
2810     test -n "$arch" && test -n "$target_os" ||
2811         die "Must specify target arch and OS when cross-compiling"
2812 fi
2813
2814 ar_default="${cross_prefix}${ar_default}"
2815 cc_default="${cross_prefix}${cc_default}"
2816 occ_default="${cross_prefix}${occ_default}"
2817 nm_default="${cross_prefix}${nm_default}"
2818 pkg_config_default="${cross_prefix}${pkg_config_default}"
2819 ranlib="${cross_prefix}${ranlib}"
2820 strip="${cross_prefix}${strip}"
2821
2822 sysinclude_default="${sysroot}/usr/include"
2823
2824 set_default arch cc pkg_config sysinclude target_exec target_os
2825 enabled cross_compile || host_cc_default=$cc
2826 set_default host_cc
2827
2828 if ! $pkg_config --version >/dev/null 2>&1; then
2829     warn "$pkg_config not found, library detection may fail."
2830     pkg_config=false
2831 fi
2832
2833 exesuf() {
2834     case $1 in
2835         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2836     esac
2837 }
2838
2839 EXESUF=$(exesuf $target_os)
2840 HOSTEXESUF=$(exesuf $host_os)
2841
2842 # set temporary file name
2843 : ${TMPDIR:=$TEMPDIR}
2844 : ${TMPDIR:=$TMP}
2845 : ${TMPDIR:=/tmp}
2846
2847 if ! check_cmd mktemp -u XXXXXX; then
2848     # simple replacement for missing mktemp
2849     # NOT SAFE FOR GENERAL USE
2850     mktemp(){
2851         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2852     }
2853 fi
2854
2855 tmpfile(){
2856     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2857         (set -C; exec > $tmp) 2>/dev/null ||
2858         die "Unable to create temporary file in $TMPDIR."
2859     append TMPFILES $tmp
2860     eval $1=$tmp
2861 }
2862
2863 trap 'rm -f -- $TMPFILES' EXIT
2864
2865 tmpfile TMPASM .asm
2866 tmpfile TMPC   .c
2867 tmpfile TMPE   $EXESUF
2868 tmpfile TMPH   .h
2869 tmpfile TMPO   .o
2870 tmpfile TMPS   .S
2871 tmpfile TMPSH  .sh
2872 tmpfile TMPV   .ver
2873
2874 unset -f mktemp
2875
2876 chmod +x $TMPE
2877
2878 # make sure we can execute files in $TMPDIR
2879 cat > $TMPSH 2>> $logfile <<EOF
2880 #! /bin/sh
2881 EOF
2882 chmod +x $TMPSH >> $logfile 2>&1
2883 if ! $TMPSH >> $logfile 2>&1; then
2884     cat <<EOF
2885 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2886 variable to another directory and make sure that it is not mounted noexec.
2887 EOF
2888     die "Sanity test failed."
2889 fi
2890
2891 armasm_flags(){
2892     for flag; do
2893         case $flag in
2894             # Filter out MSVC cl.exe options from cflags that shouldn't
2895             # be passed to gas-preprocessor
2896             -M[TD]*)                                            ;;
2897             *)                  echo $flag                      ;;
2898         esac
2899    done
2900 }
2901
2902 ccc_flags(){
2903     for flag; do
2904         case $flag in
2905             -std=c99)           echo -c99                       ;;
2906             -mcpu=*)            echo -arch ${flag#*=}           ;;
2907             -mieee)             echo -ieee                      ;;
2908             -O*|-fast)          echo $flag                      ;;
2909             -fno-math-errno)    echo -assume nomath_errno       ;;
2910             -g)                 echo -g3                        ;;
2911             -Wall)              echo -msg_enable level2         ;;
2912             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2913             -Wl,*)              echo $flag                      ;;
2914             -f*|-W*)                                            ;;
2915             *)                  echo $flag                      ;;
2916         esac
2917    done
2918 }
2919
2920 cparser_flags(){
2921     for flag; do
2922         case $flag in
2923             -Wno-switch)             echo -Wno-switch-enum ;;
2924             -Wno-format-zero-length) ;;
2925             -Wdisabled-optimization) ;;
2926             -Wno-pointer-sign)       echo -Wno-other ;;
2927             *)                       echo $flag ;;
2928         esac
2929     done
2930 }
2931
2932 msvc_common_flags(){
2933     for flag; do
2934         case $flag in
2935             # In addition to specifying certain flags under the compiler
2936             # specific filters, they must be specified here as well or else the
2937             # generic catch all at the bottom will print the original flag.
2938             -Wall)                ;;
2939             -std=c99)             ;;
2940             # Common flags
2941             -fomit-frame-pointer) ;;
2942             -g)                   echo -Z7 ;;
2943             -fno-math-errno)      ;;
2944             -fno-common)          ;;
2945             -fno-signed-zeros)    ;;
2946             -fPIC)                ;;
2947             -mthumb)              ;;
2948             -march=*)             ;;
2949             -lz)                  echo zlib.lib ;;
2950             -lavifil32)           echo vfw32.lib ;;
2951             -lavicap32)           echo vfw32.lib user32.lib ;;
2952             -lx264)               echo libx264.lib ;;
2953             -l*)                  echo ${flag#-l}.lib ;;
2954             -L*)                  echo -libpath:${flag#-L} ;;
2955             *)                    echo $flag ;;
2956         esac
2957     done
2958 }
2959
2960 msvc_flags(){
2961     msvc_common_flags "$@"
2962     for flag; do
2963         case $flag in
2964             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2965                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2966                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2967                                        -wd4273 -wd4554 -wd4701 ;;
2968         esac
2969     done
2970 }
2971
2972 icl_flags(){
2973     msvc_common_flags "$@"
2974     for flag; do
2975         case $flag in
2976             # Despite what Intel's documentation says -Wall, which is supported
2977             # on Windows, does enable remarks so disable them here.
2978             -Wall)                echo $flag -Qdiag-disable:remark ;;
2979             -std=c99)             echo -Qstd=c99 ;;
2980         esac
2981     done
2982 }
2983
2984 pgi_flags(){
2985     for flag; do
2986         case $flag in
2987             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2988             -fomit-frame-pointer) echo -Mnoframe ;;
2989             -g)                   echo -gopt ;;
2990             *)                    echo $flag ;;
2991         esac
2992     done
2993 }
2994
2995 suncc_flags(){
2996     for flag; do
2997         case $flag in
2998             -march=*|-mcpu=*)
2999                 case "${flag#*=}" in
3000                     native)                   echo -xtarget=native       ;;
3001                     v9|niagara)               echo -xarch=sparc          ;;
3002                     ultrasparc)               echo -xarch=sparcvis       ;;
3003                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3004                     i586|pentium)             echo -xchip=pentium        ;;
3005                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3006                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3007                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3008                     pentium4*)          echo -xtarget=pentium4           ;;
3009                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3010                     *-sse3)             echo -xarch=sse3                 ;;
3011                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3012                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3013                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3014                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3015                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3016                     k8|opteron|athlon64|athlon-fx)
3017                                                echo -xarch=sse2a         ;;
3018                     athlon*)                   echo -xarch=pentium_proa  ;;
3019                 esac
3020                 ;;
3021             -std=c99)             echo -xc99              ;;
3022             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3023             -fPIC)                echo -KPIC -xcode=pic32 ;;
3024             -W*,*)                echo $flag              ;;
3025             -f*-*|-W*|-mimpure-text)                      ;;
3026             -shared)              echo -G                 ;;
3027             *)                    echo $flag              ;;
3028         esac
3029     done
3030 }
3031
3032 tms470_flags(){
3033     for flag; do
3034         case $flag in
3035             -march=*|-mcpu=*)
3036                 case "${flag#*=}" in
3037                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3038                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3039                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3040                     armv6*|arm11*)          echo -mv=6   ;;
3041                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3042                                             echo -mv=5e  ;;
3043                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3044                 esac
3045                 ;;
3046             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3047             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3048             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3049             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3050             -msoft-float)   echo --float_support=vfplib       ;;
3051             -O[0-3]|-mf=*)  echo $flag                        ;;
3052             -g)             echo -g -mn                       ;;
3053             -pds=*)         echo $flag                        ;;
3054             -D*|-I*)        echo $flag                        ;;
3055             --gcc|--abi=*)  echo $flag                        ;;
3056             -me)            echo $flag                        ;;
3057         esac
3058     done
3059 }
3060
3061 probe_cc(){
3062     pfx=$1
3063     _cc=$2
3064
3065     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3066     unset _ld_o _ldflags _ld_lib _ld_path
3067     unset _depflags _DEPCMD _DEPFLAGS
3068     _flags_filter=echo
3069
3070     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3071         _type=llvm_gcc
3072         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3073         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3074         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3075         _cflags_speed='-O3'
3076         _cflags_size='-Os'
3077     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3078         _type=gcc
3079         gcc_version=$($_cc --version | head -n1)
3080         gcc_basever=$($_cc -dumpversion)
3081         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3082         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3083         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3084         if ! $_cc -dumpversion | grep -q '^2\.'; then
3085             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3086         fi
3087         _cflags_speed='-O3'
3088         _cflags_size='-Os'
3089     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3090         _type=icc
3091         _ident=$($_cc --version | head -n1)
3092         _depflags='-MMD'
3093         _cflags_speed='-O3'
3094         _cflags_size='-Os'
3095         _cflags_noopt='-O1'
3096     elif $_cc -v 2>&1 | grep -q xlc; then
3097         _type=xlc
3098         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3099         _cflags_speed='-O5'
3100         _cflags_size='-O5 -qcompact'
3101     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3102         _type=ccc
3103         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3104         _DEPFLAGS='-M'
3105         _cflags_speed='-fast'
3106         _cflags_size='-O1'
3107         _flags_filter=ccc_flags
3108     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3109         test -d "$sysroot" || die "No valid sysroot specified."
3110         _type=armcc
3111         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3112         armcc_conf="$PWD/armcc.conf"
3113         $_cc --arm_linux_configure                 \
3114              --arm_linux_config_file="$armcc_conf" \
3115              --configure_sysroot="$sysroot"        \
3116              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3117              die "Error creating armcc configuration file."
3118         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3119         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3120         as_default="${cross_prefix}gcc"
3121         _depflags='-MMD'
3122         _cflags_speed='-O3'
3123         _cflags_size='-Os'
3124     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3125         _type=tms470
3126         _ident=$($_cc -version | head -n1 | tr -s ' ')
3127         _flags='--gcc --abi=eabi -me'
3128         _cc_e='-ppl -fe=$@'
3129         _cc_o='-fe=$@'
3130         _depflags='-ppa -ppd=$(@:.o=.d)'
3131         _cflags_speed='-O3 -mf=5'
3132         _cflags_size='-O3 -mf=2'
3133         _flags_filter=tms470_flags
3134     elif $_cc -v 2>&1 | grep -q clang; then
3135         _type=clang
3136         _ident=$($_cc --version 2>/dev/null | head -n1)
3137         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3138         _cflags_speed='-O3'
3139         _cflags_size='-Os'
3140     elif $_cc -V 2>&1 | grep -q Sun; then
3141         _type=suncc
3142         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3143         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3144         _DEPFLAGS='-xM1 -xc99'
3145         _ldflags='-std=c99'
3146         _cflags_speed='-O5'
3147         _cflags_size='-O5 -xspace'
3148         _flags_filter=suncc_flags
3149     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3150         _type=pathscale
3151         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3152         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3153         _cflags_speed='-O2'
3154         _cflags_size='-Os'
3155         _flags_filter='filter_out -Wdisabled-optimization'
3156     elif $_cc -v 2>&1 | grep -q Open64; then
3157         _type=open64
3158         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3159         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3160         _cflags_speed='-O2'
3161         _cflags_size='-Os'
3162         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3163     elif $_cc -V 2>&1 | grep -q Portland; then
3164         _type=pgi
3165         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3166         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3167         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3168         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3169         _cflags_noopt="-O1"
3170         _flags_filter=pgi_flags
3171     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3172         _type=armasm
3173         _ident=$($_cc | head -n1)
3174         # 4509: "This form of conditional instruction is deprecated"
3175         _flags="-nologo -ignore 4509"
3176         _flags_filter=armasm_flags
3177     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3178         _type=msvc
3179         _ident=$($_cc 2>&1 | head -n1)
3180         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3181         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3182         _cflags_speed="-O2"
3183         _cflags_size="-O1"
3184         if $_cc -nologo- 2>&1 | grep -q Linker; then
3185             _ld_o='-out:$@'
3186         else
3187             _ld_o='-Fe$@'
3188         fi
3189         _cc_o='-Fo$@'
3190         _cc_e='-P -Fi$@'
3191         _flags_filter=msvc_flags
3192         _ld_lib='lib%.a'
3193         _ld_path='-libpath:'
3194         _flags='-nologo'
3195         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3196     elif $_cc 2>&1 | grep -q Intel; then
3197         _type=icl
3198         _ident=$($_cc 2>&1 | head -n1)
3199         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3200         # Not only is O3 broken on 13.x+ but it is slower on all previous
3201         # versions (tested) as well.
3202         _cflags_speed="-O2"
3203         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3204         if $_cc 2>&1 | grep -q Linker; then
3205             _ld_o='-out:$@'
3206         else
3207             _ld_o='-Fe$@'
3208         fi
3209         _cc_o='-Fo$@'
3210         _cc_e='-P'
3211         _flags_filter=icl_flags
3212         _ld_lib='lib%.a'
3213         _ld_path='-libpath:'
3214         # -Qdiag-error to make icl error when seeing certain unknown arguments
3215         _flags='-nologo -Qdiag-error:4044,10157'
3216         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3217         # with MSVC which enables it by default.
3218         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3219     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3220         _type=cparser
3221         _ident=$($_cc --version | head -n1)
3222         _depflags='-MMD'
3223         _cflags_speed='-O4'
3224         _cflags_size='-O2'
3225         _flags_filter=cparser_flags
3226     fi
3227
3228     eval ${pfx}_type=\$_type
3229     eval ${pfx}_ident=\$_ident
3230 }
3231
3232 set_ccvars(){
3233     eval ${1}_C=\${_cc_c-\${${1}_C}}
3234     eval ${1}_E=\${_cc_e-\${${1}_E}}
3235     eval ${1}_O=\${_cc_o-\${${1}_O}}
3236
3237     if [ -n "$_depflags" ]; then
3238         eval ${1}_DEPFLAGS=\$_depflags
3239     else
3240         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3241         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3242         eval DEP${1}FLAGS=\$_flags
3243     fi
3244 }
3245
3246 probe_cc cc "$cc"
3247 cflags_filter=$_flags_filter
3248 cflags_speed=$_cflags_speed
3249 cflags_size=$_cflags_size
3250 cflags_noopt=$_cflags_noopt
3251 add_cflags $_flags $_cflags
3252 cc_ldflags=$_ldflags
3253 set_ccvars CC
3254
3255 probe_cc hostcc "$host_cc"
3256 host_cflags_filter=$_flags_filter
3257 add_host_cflags  $_flags $_cflags
3258 set_ccvars HOSTCC
3259
3260 test -n "$cc_type" && enable $cc_type ||
3261     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3262
3263 : ${as_default:=$cc}
3264 : ${objcc_default:=$cc}
3265 : ${dep_cc_default:=$cc}
3266 : ${ld_default:=$cc}
3267 : ${host_ld_default:=$host_cc}
3268 set_default ar as objcc dep_cc ld host_ld
3269
3270 probe_cc as "$as"
3271 asflags_filter=$_flags_filter
3272 add_asflags $_flags $_cflags
3273 set_ccvars AS
3274
3275 probe_cc objcc "$objcc"
3276 objcflags_filter=$_flags_filter
3277 add_objcflags $_flags $_cflags
3278 set_ccvars OBJC
3279
3280 probe_cc ld "$ld"
3281 ldflags_filter=$_flags_filter
3282 add_ldflags $_flags $_ldflags
3283 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3284 LD_O=${_ld_o-$LD_O}
3285 LD_LIB=${_ld_lib-$LD_LIB}
3286 LD_PATH=${_ld_path-$LD_PATH}
3287
3288 probe_cc hostld "$host_ld"
3289 host_ldflags_filter=$_flags_filter
3290 add_host_ldflags $_flags $_ldflags
3291 HOSTLD_O=${_ld_o-$HOSTLD_O}
3292
3293 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3294     probe_cc depcc "$dep_cc"
3295     CCDEP=${_DEPCMD:-$DEPCMD}
3296     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3297     DEPCCFLAGS=$_flags
3298 fi
3299
3300 if $ar 2>&1 | grep -q Microsoft; then
3301     arflags="-nologo"
3302     ar_o='-out:$@'
3303 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3304     arflags="rq"
3305     ar_o='$@'
3306 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3307     arflags='-Xany -r -c'
3308     ar_o='$@'
3309 else
3310     arflags="rc"
3311     ar_o='$@'
3312 fi
3313
3314 add_cflags $extra_cflags
3315 add_objcflags $extra_objcflags
3316 add_asflags $extra_cflags
3317
3318 if test -n "$sysroot"; then
3319     case "$cc_type" in
3320         gcc|llvm_gcc|clang)
3321             add_cppflags --sysroot="$sysroot"
3322             add_ldflags --sysroot="$sysroot"
3323         ;;
3324         tms470)
3325             add_cppflags -I"$sysinclude"
3326             add_ldflags  --sysroot="$sysroot"
3327         ;;
3328     esac
3329 fi
3330
3331 if test "$cpu" = host; then
3332     enabled cross_compile &&
3333         die "--cpu=host makes no sense when cross-compiling."
3334
3335     case "$cc_type" in
3336         gcc|llvm_gcc)
3337             check_native(){
3338                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3339                 sed -n "/cc1.*$1=/{
3340                             s/.*$1=\\([^ ]*\\).*/\\1/
3341                             p
3342                             q
3343                         }" $TMPE
3344             }
3345             cpu=$(check_native -march || check_native -mcpu)
3346         ;;
3347     esac
3348
3349     test "${cpu:-host}" = host &&
3350         die "--cpu=host not supported with compiler $cc"
3351 fi
3352
3353 # Deal with common $arch aliases
3354 case "$arch" in
3355     aarch64|arm64)
3356         arch="aarch64"
3357     ;;
3358     arm*)
3359         arch="arm"
3360     ;;
3361     mips*|IP*)
3362         case "$arch" in
3363         *el)
3364             add_cppflags -EL
3365             add_ldflags -EL
3366         ;;
3367         *eb)
3368             add_cppflags -EB
3369             add_ldflags -EB
3370         ;;
3371         esac
3372         arch="mips"
3373     ;;
3374     parisc*|hppa*)
3375         arch="parisc"
3376     ;;
3377     "Power Macintosh"|ppc*|powerpc*)
3378         arch="ppc"
3379     ;;
3380     s390|s390x)
3381         arch="s390"
3382     ;;
3383     sh4|sh)
3384         arch="sh4"
3385     ;;
3386     sun4u|sparc*)
3387         arch="sparc"
3388     ;;
3389     tilegx|tile-gx)
3390         arch="tilegx"
3391     ;;
3392     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3393         arch="x86"
3394     ;;
3395 esac
3396
3397 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3398 enable $arch
3399
3400 # Add processor-specific flags
3401 if enabled aarch64; then
3402
3403     case $cpu in
3404         armv*)
3405             cpuflags="-march=$cpu"
3406         ;;
3407         *)
3408             cpuflags="-mcpu=$cpu"
3409         ;;
3410     esac
3411
3412 elif enabled alpha; then
3413
3414     cpuflags="-mcpu=$cpu"
3415
3416 elif enabled arm; then
3417
3418     check_arm_arch() {
3419         check_cpp_condition stddef.h \
3420             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3421             $cpuflags
3422     }
3423
3424     probe_arm_arch() {
3425         if   check_arm_arch 4;        then echo armv4;
3426         elif check_arm_arch 4T;       then echo armv4t;
3427         elif check_arm_arch 5;        then echo armv5;
3428         elif check_arm_arch 5E;       then echo armv5e;
3429         elif check_arm_arch 5T;       then echo armv5t;
3430         elif check_arm_arch 5TE;      then echo armv5te;
3431         elif check_arm_arch 5TEJ;     then echo armv5te;
3432         elif check_arm_arch 6;        then echo armv6;
3433         elif check_arm_arch 6J;       then echo armv6j;
3434         elif check_arm_arch 6K;       then echo armv6k;
3435         elif check_arm_arch 6Z;       then echo armv6z;
3436         elif check_arm_arch 6ZK;      then echo armv6zk;
3437         elif check_arm_arch 6T2;      then echo armv6t2;
3438         elif check_arm_arch 7;        then echo armv7;
3439         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3440         elif check_arm_arch 7S;       then echo armv7-a;
3441         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3442         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3443         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3444         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3445         fi
3446     }
3447
3448     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3449
3450     case $cpu in
3451         armv*)
3452             cpuflags="-march=$cpu"
3453             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3454         ;;
3455         *)
3456             cpuflags="-mcpu=$cpu"
3457             case $cpu in
3458                 cortex-a*)                               subarch=armv7a  ;;
3459                 cortex-r*)                               subarch=armv7r  ;;
3460                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3461                 arm11*)                                  subarch=armv6   ;;
3462                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3463                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3464                 *)                             subarch=$(probe_arm_arch) ;;
3465             esac
3466         ;;
3467     esac
3468
3469     case "$subarch" in
3470         armv5t*)    enable fast_clz                ;;
3471         armv[6-8]*) enable fast_clz fast_unaligned ;;
3472     esac
3473
3474 elif enabled avr32; then
3475
3476     case $cpu in
3477         ap7[02]0[0-2])
3478             subarch="avr32_ap"
3479             cpuflags="-mpart=$cpu"
3480         ;;
3481         ap)
3482             subarch="avr32_ap"
3483             cpuflags="-march=$cpu"
3484         ;;
3485         uc3[ab]*)
3486             subarch="avr32_uc"
3487             cpuflags="-mcpu=$cpu"
3488         ;;
3489         uc)
3490             subarch="avr32_uc"
3491             cpuflags="-march=$cpu"
3492         ;;
3493     esac
3494
3495 elif enabled bfin; then
3496
3497     cpuflags="-mcpu=$cpu"
3498
3499 elif enabled mips; then
3500
3501     cpuflags="-march=$cpu"
3502
3503 elif enabled ppc; then
3504
3505     disable ldbrx
3506
3507     case $(tolower $cpu) in
3508         601|ppc601|powerpc601)
3509             cpuflags="-mcpu=601"
3510             disable altivec
3511         ;;
3512         603*|ppc603*|powerpc603*)
3513             cpuflags="-mcpu=603"
3514             disable altivec
3515         ;;
3516         604*|ppc604*|powerpc604*)
3517             cpuflags="-mcpu=604"
3518             disable altivec
3519         ;;
3520         g3|75*|ppc75*|powerpc75*)
3521             cpuflags="-mcpu=750"
3522             disable altivec
3523         ;;
3524         g4|745*|ppc745*|powerpc745*)
3525             cpuflags="-mcpu=7450"
3526             disable vsx
3527         ;;
3528         74*|ppc74*|powerpc74*)
3529             cpuflags="-mcpu=7400"
3530             disable vsx
3531         ;;
3532         g5|970|ppc970|powerpc970)
3533             cpuflags="-mcpu=970"
3534             disable vsx
3535         ;;
3536         power[3-6]*)
3537             cpuflags="-mcpu=$cpu"
3538             disable vsx
3539         ;;
3540         power[7-8]*)
3541             cpuflags="-mcpu=$cpu"
3542             enable ldbrx
3543         ;;
3544         cell)
3545             cpuflags="-mcpu=cell"
3546             enable ldbrx
3547             disable vsx
3548         ;;
3549         e500mc)
3550             cpuflags="-mcpu=e500mc"
3551             disable altivec
3552         ;;
3553         e500v2)
3554             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3555             disable altivec
3556             disable dcbzl
3557         ;;
3558         e500)
3559             cpuflags="-mcpu=8540 -mhard-float"
3560             disable altivec
3561             disable dcbzl
3562         ;;
3563     esac
3564
3565 elif enabled sparc; then
3566
3567     case $cpu in
3568         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3569             cpuflags="-mcpu=$cpu"
3570         ;;
3571         ultrasparc*|niagara[234])
3572             cpuflags="-mcpu=$cpu"
3573         ;;
3574     esac
3575
3576 elif enabled x86; then
3577
3578     case $cpu in
3579         i[345]86|pentium)
3580             cpuflags="-march=$cpu"
3581             disable i686
3582             disable mmx
3583         ;;
3584         # targets that do NOT support nopl and conditional mov (cmov)
3585         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3586             cpuflags="-march=$cpu"
3587             disable i686
3588         ;;
3589         # targets that do support nopl and conditional mov (cmov)
3590         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3591             cpuflags="-march=$cpu"
3592             enable i686
3593             enable fast_cmov
3594         ;;
3595         # targets that do support conditional mov but on which it's slow
3596         pentium4|pentium4m|prescott|nocona)
3597             cpuflags="-march=$cpu"
3598             enable i686
3599             disable fast_cmov
3600         ;;
3601     esac
3602
3603 fi
3604
3605 if [ "$cpu" != generic ]; then
3606     add_cflags  $cpuflags
3607     add_asflags $cpuflags
3608     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3609 fi
3610
3611 # compiler sanity check
3612 check_exec <<EOF
3613 int main(void){ return 0; }
3614 EOF
3615 if test "$?" != 0; then
3616     echo "$cc is unable to create an executable file."
3617     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3618         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3619         echo "Only do this if you know what cross compiling means."
3620     fi
3621     die "C compiler test failed."
3622 fi
3623
3624 add_cppflags -D_ISOC99_SOURCE
3625 check_cflags -std=c99
3626 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3627 #include <stdlib.h>
3628 EOF
3629 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3630 #include <stdlib.h>
3631 EOF
3632
3633 add_host_cppflags -D_ISOC99_SOURCE
3634 check_host_cflags -std=c99
3635 check_host_cflags -Wall
3636 check_host_cflags -O3
3637
3638 check_64bit(){
3639     arch32=$1
3640     arch64=$2
3641     expr=$3
3642     check_code cc "" "int test[2*($expr) - 1]" &&
3643         subarch=$arch64 || subarch=$arch32
3644 }
3645
3646 case "$arch" in
3647     aarch64|alpha|ia64)
3648         spic=$shared
3649     ;;
3650     mips)
3651         check_64bit mips mips64 '_MIPS_SIM > 1'
3652         spic=$shared
3653     ;;
3654     parisc)
3655         check_64bit parisc parisc64 'sizeof(void *) > 4'
3656         spic=$shared
3657     ;;
3658     ppc)
3659         check_64bit ppc ppc64 'sizeof(void *) > 4'
3660         spic=$shared
3661     ;;
3662     s390)
3663         check_64bit s390 s390x 'sizeof(void *) > 4'
3664         spic=$shared
3665     ;;
3666     sparc)
3667         check_64bit sparc sparc64 'sizeof(void *) > 4'
3668         spic=$shared
3669     ;;
3670     x86)
3671         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3672         if test "$subarch" = "x86_64"; then
3673             spic=$shared
3674         fi
3675     ;;
3676 esac
3677
3678 enable $subarch
3679 enabled spic && enable_weak pic
3680
3681 # OS specific
3682 case $target_os in
3683     aix)
3684         SHFLAGS=-shared
3685         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3686         enabled shared && add_ldflags -Wl,-brtl
3687         ;;
3688     android)
3689         disable symver
3690         enable section_data_rel_ro
3691         SLIB_INSTALL_NAME='$(SLIBNAME)'
3692         SLIB_INSTALL_LINKS=
3693         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3694         ;;
3695     haiku)
3696         prefix_default="/boot/common"
3697         network_extralibs="-lnetwork"
3698         host_libs=
3699         ;;
3700     sunos)
3701         SHFLAGS='-shared -Wl,-h,$$(@F)'
3702         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3703         network_extralibs="-lsocket -lnsl"
3704         # When using suncc to build, the Solaris linker will mark
3705         # an executable with each instruction set encountered by
3706         # the Solaris assembler.  As our libraries contain their own
3707         # guards for processor-specific code, instead suppress
3708         # generation of the HWCAPS ELF section on Solaris x86 only.
3709         enabled_all suncc x86 &&
3710             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3711             add_ldflags -Wl,-M,mapfile
3712         nm_default='nm -P -g'
3713         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3714         ;;
3715     netbsd)
3716         disable symver
3717         oss_indev_extralibs="-lossaudio"
3718         oss_outdev_extralibs="-lossaudio"
3719         ;;
3720     openbsd|bitrig)
3721         disable symver
3722         SHFLAGS='-shared'
3723         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3724         SLIB_INSTALL_LINKS=
3725         oss_indev_extralibs="-lossaudio"
3726         oss_outdev_extralibs="-lossaudio"
3727         ;;
3728     dragonfly)
3729         disable symver
3730         ;;
3731     freebsd)
3732         ;;
3733     bsd/os)
3734         add_extralibs -lpoll -lgnugetopt
3735         ;;
3736     darwin)
3737         enabled ppc && add_asflags -force_cpusubtype_ALL
3738         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3739         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3740         add_ldflags -Wl,-dynamic,-search_paths_first
3741         SLIBSUF=".dylib"
3742         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3743         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3744         objformat="macho"
3745         enabled x86_64 && objformat="macho64"
3746         enabled_any pic shared ||
3747             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3748         ;;
3749     msys*)
3750         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3751         ;;
3752     mingw32*|mingw64*)
3753         if test $target_os = "mingw32ce"; then
3754             disable network
3755         else
3756             target_os=mingw32
3757         fi
3758         LIBTARGET=i386
3759         if enabled x86_64; then
3760             LIBTARGET="i386:x86-64"
3761         elif enabled arm; then
3762             LIBTARGET=arm-wince
3763         fi
3764         check_ldflags -Wl,--nxcompat
3765         check_ldflags -Wl,--dynamicbase
3766         shlibdir_default="$bindir_default"
3767         SLIBPREF=""
3768         SLIBSUF=".dll"
3769         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3770         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3771         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3772         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3773         SLIB_INSTALL_LINKS=
3774         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3775         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3776         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3777         objformat="win32"
3778         dlltool="${cross_prefix}dlltool"
3779         ranlib=:
3780         enable dos_paths
3781         ;;
3782     win32|win64)
3783         disable symver
3784         if enabled shared; then
3785             # Link to the import library instead of the normal static library
3786             # for shared libs.
3787             LD_LIB='%.lib'
3788             # Cannot build both shared and static libs with MSVC or icl.
3789             disable static
3790         fi
3791         shlibdir_default="$bindir_default"
3792         SLIBPREF=""
3793         SLIBSUF=".dll"
3794         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3795         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3796         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3797         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3798         SLIB_INSTALL_LINKS=
3799         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3800         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3801         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3802         objformat="win32"
3803         ranlib=:
3804         enable dos_paths
3805         ;;
3806     cygwin*)
3807         target_os=cygwin
3808         shlibdir_default="$bindir_default"
3809         SLIBPREF="cyg"
3810         SLIBSUF=".dll"
3811         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3812         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3813         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3814         SLIB_INSTALL_LINKS=
3815         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3816         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3817         objformat="win32"
3818         enable dos_paths
3819         ;;
3820     *-dos|freedos|opendos)
3821         network_extralibs="-lsocket"
3822         objformat="coff"
3823         enable dos_paths
3824         add_cppflags -U__STRICT_ANSI__
3825         ;;
3826     linux)
3827         enable dv1394
3828         enable section_data_rel_ro
3829         ;;
3830     irix*)
3831         target_os=irix
3832         ranlib="echo ignoring ranlib"
3833         ;;
3834     os/2*)
3835         ln_s="cp -f"
3836         objformat="aout"
3837         add_cppflags -D_GNU_SOURCE
3838         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3839         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3840         LIBSUF="_s.a"
3841         SLIBPREF=""
3842         SLIBSUF=".dll"
3843         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3844         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3845         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3846             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3847             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3848             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3849             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3850         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3851             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3852         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3853         enable dos_paths
3854         ;;
3855     gnu/kfreebsd)
3856         add_cppflags -D_BSD_SOURCE
3857         ;;
3858     gnu)
3859         ;;
3860     qnx)
3861         add_cppflags -D_QNX_SOURCE
3862         network_extralibs="-lsocket"
3863         ;;
3864     symbian)
3865         SLIBSUF=".dll"
3866         enable dos_paths
3867         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3868         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3869         add_ldflags -Wl,--target1-abs,--no-undefined \
3870                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3871                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3872         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3873                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3874                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3875         ;;
3876     osf1)
3877         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3878         ;;
3879     minix)
3880         ;;
3881     plan9)
3882         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3883                      -D_REENTRANT_SOURCE        \
3884                      -D_RESEARCH_SOURCE         \
3885                      -DFD_SETSIZE=96            \
3886                      -DHAVE_SOCK_OPTS
3887         add_compat strtod.o strtod=avpriv_strtod
3888         network_extralibs='-lbsd'
3889         exeobjs=compat/plan9/main.o
3890         cp_f='cp'
3891         ;;
3892     none)
3893         ;;
3894     *)
3895         die "Unknown OS '$target_os'."
3896         ;;
3897 esac
3898
3899 # determine libc flavour
3900
3901 probe_libc(){
3902     pfx=$1
3903     pfx_no_=${pfx%_}
3904     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3905     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3906         eval ${pfx}libc_type=uclibc
3907         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3908     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3909         eval ${pfx}libc_type=glibc
3910         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3911     # MinGW headers can be installed on Cygwin, so check for newlib first.
3912     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3913         eval ${pfx}libc_type=newlib
3914         add_${pfx}cppflags -U__STRICT_ANSI__
3915     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3916     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3917         eval ${pfx}libc_type=mingw64
3918         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3919         eval test \$${pfx_no_}cc_type = "gcc" &&
3920             add_${pfx}cppflags -D__printf__=__gnu_printf__
3921     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3922          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3923         eval ${pfx}libc_type=mingw32
3924         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3925             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3926             die "ERROR: MinGW32 runtime version must be >= 3.15."
3927         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3928         eval test \$${pfx_no_}cc_type = "gcc" &&
3929             add_${pfx}cppflags -D__printf__=__gnu_printf__
3930     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3931         eval ${pfx}libc_type=msvcrt
3932         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3933             if [ "$pfx" = host_ ]; then
3934                 add_host_cppflags -Dsnprintf=_snprintf
3935             else
3936                 add_compat strtod.o strtod=avpriv_strtod
3937                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3938                                              _snprintf=avpriv_snprintf  \
3939                                              vsnprintf=avpriv_vsnprintf
3940             fi
3941         fi
3942         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3943         # 0x601 by default unless something else is set by the user.
3944         # This can easily lead to us detecting functions only present
3945         # in such new versions and producing binaries requiring windows 7.0.
3946         # Therefore explicitly set the default to XP unless the user has
3947         # set something else on the command line.
3948         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3949         # family. For these cases, configure is free to use any functions
3950         # found in the SDK headers by default. (Alternatively, we could force
3951         # _WIN32_WINNT to 0x0602 in that case.)
3952         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3953             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3954 #ifdef WINAPI_FAMILY
3955 #include <winapifamily.h>
3956 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3957 #error not desktop
3958 #endif
3959 #endif
3960 EOF
3961     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3962         eval ${pfx}libc_type=klibc
3963     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3964         eval ${pfx}libc_type=bionic
3965     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3966         eval ${pfx}libc_type=solaris
3967         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3968     else
3969         eval ${pfx}libc_type=default
3970         add_${pfx}cppflags -D_DEFAULT_SOURCE
3971     fi
3972 }
3973
3974 probe_libc
3975 test -n "$libc_type" && enable libc_$libc_type
3976 probe_libc host_
3977 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3978
3979 case $libc_type in
3980     bionic)
3981         add_compat strtod.o strtod=avpriv_strtod
3982         ;;
3983 esac
3984
3985 # hacks for compiler/libc/os combinations
3986
3987 if enabled_all tms470 libc_glibc; then
3988     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3989     add_cppflags -D__USER_LABEL_PREFIX__=
3990     add_cppflags -D__builtin_memset=memset
3991     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3992     add_cflags   -pds=48    # incompatible redefinition of macro
3993 fi
3994
3995 if enabled_all ccc libc_glibc; then
3996     add_ldflags -Wl,-z,now  # calls to libots crash without this
3997 fi
3998
3999 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4000     add_cppflags '-I\$(SRC_PATH)/compat/float'
4001
4002 esc(){
4003     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4004 }
4005
4006 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4007
4008 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4009
4010 set_default $PATHS_LIST
4011 set_default nm
4012
4013 # we need to build at least one lib type
4014 if ! enabled_any static shared; then
4015     cat <<EOF
4016 At least one library type must be built.
4017 Specify --enable-static to build the static libraries or --enable-shared to
4018 build the shared libraries as well. To only build the shared libraries specify
4019 --disable-static in addition to --enable-shared.
4020 EOF
4021     exit 1;
4022 fi
4023
4024 die_license_disabled() {
4025     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4026 }
4027
4028 die_license_disabled gpl libcdio
4029 die_license_disabled gpl libx264
4030 die_license_disabled gpl libx265
4031 die_license_disabled gpl libxavs
4032 die_license_disabled gpl libxvid
4033 die_license_disabled gpl x11grab
4034
4035 die_license_disabled nonfree cuda
4036 die_license_disabled nonfree libfaac
4037 die_license_disabled nonfree libfdk_aac
4038 die_license_disabled nonfree libnpp
4039 die_license_disabled nonfree nvenc
4040 die_license_disabled nonfree openssl
4041
4042 die_license_disabled version3 libopencore_amrnb
4043 die_license_disabled version3 libopencore_amrwb
4044 die_license_disabled version3 libvo_aacenc
4045 die_license_disabled version3 libvo_amrwbenc
4046
4047 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4048
4049 disabled optimizations || check_cflags -fomit-frame-pointer
4050
4051 enable_weak_pic() {
4052     disabled pic && return
4053     enable pic
4054     add_cppflags -DPIC
4055     case "$target_os" in
4056     mingw*|cygwin*)
4057         ;;
4058     *)
4059         add_cflags -fPIC
4060         ;;
4061     esac
4062     add_asflags  -fPIC
4063 }
4064
4065 enabled pic && enable_weak_pic
4066
4067 check_cc <<EOF || die "Symbol mangling check failed."
4068 int ff_extern;
4069 EOF
4070 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4071 extern_prefix=${sym%%ff_extern*}
4072
4073 check_cc <<EOF && enable_weak inline_asm
4074 void foo(void) { __asm__ volatile ("" ::); }
4075 EOF
4076
4077 _restrict=
4078 for restrict_keyword in restrict __restrict__ __restrict; do
4079     check_cc <<EOF && _restrict=$restrict_keyword && break
4080 void foo(char * $restrict_keyword p);
4081 EOF
4082 done
4083
4084 check_cc <<EOF && enable pragma_deprecated
4085 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4086 EOF
4087
4088 check_cc <<EOF && enable attribute_packed
4089 struct { int x; } __attribute__((packed)) x;
4090 EOF
4091
4092 check_cc <<EOF && enable attribute_may_alias
4093 union { int x; } __attribute__((may_alias)) x;
4094 EOF
4095
4096 check_cc <<EOF || die "endian test failed"
4097 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4098 EOF
4099 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4100
4101 check_gas() {
4102     log "check_gas using '$as' as AS"
4103     # :vararg is used on aarch64, arm and ppc altivec
4104     check_as <<EOF || return 1
4105 .macro m n, y:vararg=0
4106 \n: .int \y
4107 .endm
4108 m x
4109 EOF
4110     # .altmacro is only used in arm asm
4111     ! enabled arm || check_as <<EOF || return 1
4112 .altmacro
4113 EOF
4114     enable gnu_as
4115     return 0
4116 }
4117
4118 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4119     nogas=:
4120     enabled_any arm aarch64 && nogas=die
4121     enabled_all ppc altivec && nogas=warn
4122     as_noop=-v
4123
4124     case $as_type in
4125         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4126         gcc)  gaspp_as_type=gas ;;
4127         *)    gaspp_as_type=$as_type ;;
4128     esac
4129
4130     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4131
4132     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4133         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4134
4135     if ! check_gas ; then
4136         as=${gas:=$as}
4137         check_gas || \
4138             $nogas "GNU assembler not found, install/update gas-preprocessor"
4139     fi
4140
4141     check_as <<EOF && enable as_func
4142 .func test
4143 .endfunc
4144 EOF
4145 fi
4146
4147 check_inline_asm inline_asm_labels '"1:\n"'
4148
4149 if enabled aarch64; then
4150     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4151     # internal assembler in clang 3.3 does not support this instruction
4152     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4153     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4154
4155     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4156
4157 elif enabled alpha; then
4158
4159     check_cflags -mieee
4160
4161 elif enabled arm; then
4162
4163     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4164     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4165     enabled thumb && check_cflags -mthumb || check_cflags -marm
4166
4167     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4168         enable vfp_args
4169     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4170         enable vfp_args
4171     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4172         case "${cross_prefix:-$cc}" in
4173             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4174             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4175 __asm__ (".eabi_attribute 28, 1");
4176 int main(void) { return 0; }
4177 EOF
4178         esac
4179         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4180     fi
4181
4182     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4183     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4184     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4185     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4186     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4187     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4188
4189     [ $target_os = linux ] || [ $target_os = android ] ||
4190         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4191             $ARCH_EXT_LIST_ARM
4192
4193     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4194
4195     check_as <<EOF && enable as_dn_directive
4196 ra .dn d0.i16
4197 .unreq ra
4198 EOF
4199
4200     # llvm's integrated assembler supports .object_arch from llvm 3.5
4201     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4202 .object_arch armv4
4203 EOF
4204
4205     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4206
4207 elif enabled mips; then
4208
4209     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4210
4211     # make sure that only an instruction set is enabled
4212     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4213
4214     if enabled mips64; then
4215         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4216             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4217                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4218     else
4219         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4220             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4221                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4222     fi
4223
4224 elif enabled parisc; then
4225
4226     if enabled gcc; then
4227         case $($cc -dumpversion) in
4228             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4229         esac
4230     fi
4231
4232 elif enabled ppc; then
4233
4234     enable local_aligned_8 local_aligned_16
4235
4236     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4237     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4238     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4239     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4240
4241     # AltiVec flags: The FSF version of GCC differs from the Apple version
4242     if enabled altivec; then
4243         check_cflags -maltivec -mabi=altivec &&
4244         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4245         check_cflags -faltivec
4246
4247         # check if our compiler supports Motorola AltiVec C API
4248         check_cc <<EOF || disable altivec
4249 $inc_altivec_h
4250 int main(void) {
4251     vector signed int v1 = (vector signed int) { 0 };
4252     vector signed int v2 = (vector signed int) { 1 };
4253     v1 = vec_add(v1, v2);
4254     return 0;
4255 }
4256 EOF
4257
4258         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4259     fi
4260
4261     if enabled vsx; then
4262         check_cflags -mvsx &&
4263         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4264     fi
4265
4266     if enabled power8; then
4267         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4268     fi
4269
4270 elif enabled x86; then
4271
4272     check_builtin rdtsc    intrin.h   "__rdtsc()"
4273     check_builtin mm_empty mmintrin.h "_mm_empty()"
4274
4275     enable local_aligned_8 local_aligned_16
4276
4277     # check whether EBP is available on x86
4278     # As 'i' is stored on the stack, this program will crash
4279     # if the base pointer is used to access it because the
4280     # base pointer is cleared in the inline assembly code.
4281     check_exec_crash <<EOF && enable ebp_available
4282 volatile int i=0;
4283 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4284 return i;
4285 EOF
4286
4287     # check whether EBX is available on x86
4288     check_inline_asm ebx_available '""::"b"(0)' &&
4289         check_inline_asm ebx_available '"":::"%ebx"'
4290
4291     # check whether xmm clobbers are supported
4292     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4293
4294     # check whether binutils is new enough to compile SSSE3/MMXEXT
4295     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4296     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4297
4298     if ! disabled_any asm mmx yasm; then
4299         if check_cmd $yasmexe --version; then
4300             enabled x86_64 && yasm_extra="-m amd64"
4301             yasm_debug="-g dwarf2"
4302         elif check_cmd nasm -v; then
4303             yasmexe=nasm
4304             yasm_debug="-g -F dwarf"
4305             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4306         fi
4307
4308         YASMFLAGS="-f $objformat $yasm_extra"
4309         enabled pic               && append YASMFLAGS "-DPIC"
4310         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4311         case "$objformat" in
4312             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4313         esac
4314
4315         check_yasm "movbe ecx, [5]" && enable yasm ||
4316             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4317         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4318         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4319         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4320         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4321         check_yasm "CPU amdnop" || disable cpunop
4322     fi
4323
4324     case "$cpu" in
4325         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4326             disable fast_clz
4327         ;;
4328     esac
4329
4330 fi
4331
4332 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4333
4334 check_ldflags -Wl,--as-needed
4335
4336 if check_func dlopen; then
4337     ldl=
4338 elif check_func dlopen -ldl; then
4339     ldl=-ldl
4340 fi
4341
4342 if ! disabled network; then
4343     check_func getaddrinfo $network_extralibs
4344     check_func inet_aton $network_extralibs
4345
4346     check_type netdb.h "struct addrinfo"
4347     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4348     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4349     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4350     check_type poll.h "struct pollfd"
4351     check_type netinet/sctp.h "struct sctp_event_subscribe"
4352     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4353     check_type netinet/in.h "struct sockaddr_in6"
4354     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4355     check_type "sys/types.h sys/socket.h" socklen_t
4356
4357     # Prefer arpa/inet.h over winsock2
4358     if check_header arpa/inet.h ; then
4359         check_func closesocket
4360     elif check_header winsock2.h ; then
4361         check_func_headers winsock2.h closesocket -lws2 &&
4362             network_extralibs="-lws2" ||
4363         { check_func_headers winsock2.h closesocket -lws2_32 &&
4364             network_extralibs="-lws2_32"; } || disable winsock2_h network
4365         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4366
4367         check_type ws2tcpip.h socklen_t
4368         check_type ws2tcpip.h "struct addrinfo"
4369         check_type ws2tcpip.h "struct group_source_req"
4370         check_type ws2tcpip.h "struct ip_mreq_source"
4371         check_type ws2tcpip.h "struct ipv6_mreq"
4372         check_type winsock2.h "struct pollfd"
4373         check_struct winsock2.h "struct sockaddr" sa_len
4374         check_type ws2tcpip.h "struct sockaddr_in6"
4375         check_type ws2tcpip.h "struct sockaddr_storage"
4376     else
4377         disable network
4378     fi
4379 fi
4380
4381 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4382 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4383 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4384 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4385
4386 case "$custom_allocator" in
4387     jemalloc)
4388         # jemalloc by default does not use a prefix
4389         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4390     ;;
4391     tcmalloc)
4392         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4393         malloc_prefix=tc_
4394     ;;
4395 esac
4396
4397 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4398 check_func  ${malloc_prefix}memalign            && enable memalign
4399 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4400
4401 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4402     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4403
4404 check_func  fcntl
4405 check_func  fork
4406 check_func  gethrtime
4407 check_func  getopt
4408 check_func  getrusage
4409 check_func  gettimeofday
4410 check_func  gmtime_r
4411 check_func  isatty
4412 check_func  localtime_r
4413 check_func  mach_absolute_time
4414 check_func  mkstemp
4415 check_func  mmap
4416 check_func  mprotect
4417 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4418 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4419 check_func  sched_getaffinity
4420 check_func  setrlimit
4421 check_func  strerror_r
4422 check_func  sysconf
4423 check_func  sysctl
4424 check_func  usleep
4425
4426 check_func_headers io.h setmode
4427 check_func_headers stdlib.h getenv
4428
4429 check_func_headers windows.h CoTaskMemFree -lole32
4430 check_func_headers windows.h GetProcessAffinityMask
4431 check_func_headers windows.h GetProcessTimes
4432 check_func_headers windows.h GetSystemTimeAsFileTime
4433 check_func_headers windows.h LoadLibrary
4434 check_func_headers windows.h MapViewOfFile
4435 check_func_headers windows.h SetConsoleTextAttribute
4436 check_func_headers windows.h Sleep
4437 check_func_headers windows.h VirtualAlloc
4438 check_struct windows.h "CONDITION_VARIABLE" Ptr
4439
4440 check_header direct.h
4441 check_header dlfcn.h
4442 check_header d3d11.h
4443 check_header dxva.h
4444 check_header dxva2api.h
4445 check_header io.h
4446 check_header mach/mach_time.h
4447 check_header malloc.h
4448 check_header poll.h
4449 check_header sys/mman.h
4450 check_header sys/param.h
4451 check_header sys/resource.h
4452 check_header sys/select.h
4453 check_header sys/time.h
4454 check_header sys/un.h
4455 check_header unistd.h
4456 check_header valgrind/valgrind.h
4457 check_header vdpau/vdpau.h
4458 check_header vdpau/vdpau_x11.h
4459 check_header VideoDecodeAcceleration/VDADecoder.h
4460 check_header windows.h
4461 check_header X11/extensions/XvMClib.h
4462
4463 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4464 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4465 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4466
4467 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4468
4469 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4470 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4471 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4472
4473 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4474 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4475 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4476
4477 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4478
4479 if ! disabled w32threads && ! enabled pthreads; then
4480     check_func_headers "windows.h process.h" _beginthreadex &&
4481         enable w32threads || disable w32threads
4482 fi
4483
4484 # check for some common methods of building with pthread support
4485 # do this before the optional library checks as some of them require pthreads
4486 if ! disabled pthreads && ! enabled w32threads; then
4487     enable pthreads
4488     if check_func pthread_join -pthread; then
4489         add_cflags -pthread
4490         add_extralibs -pthread
4491     elif check_func pthread_join -pthreads; then
4492         add_cflags -pthreads
4493         add_extralibs -pthreads
4494     elif check_func pthread_join -lpthreadGC2; then
4495         add_extralibs -lpthreadGC2
4496     elif check_lib pthread.h pthread_join -lpthread; then
4497         :
4498     elif ! check_func pthread_join; then
4499         disable pthreads
4500     fi
4501 fi
4502
4503 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4504 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4505
4506 check_lib math.h sin -lm && LIBM="-lm"
4507 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4508
4509 atan2f_args=2
4510 ldexpf_args=2
4511 powf_args=2
4512
4513 for func in $MATH_FUNCS; do
4514     eval check_mathfunc $func \${${func}_args:-1}
4515 done
4516
4517 # these are off by default, so fail if requested and not available
4518 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4519                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4520                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4521 enabled cuda              && check_lib cuda.h cuInit -lcuda
4522 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4523 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4524 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4525 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4526 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4527 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4528 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4529 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4530 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4531                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4532                                done || die "ERROR: libgsm not found"; }
4533 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4534 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4535 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4536 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4537 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4538 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4539 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4540 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4541 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4542 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4543                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4544 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4545 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4546 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4547 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4548 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4549 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4550 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4551 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4552 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4553 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4554 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4555 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4556     enabled libvpx_vp8_decoder && {
4557         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4558             disable libvpx_vp8_decoder;
4559     }
4560     enabled libvpx_vp8_encoder && {
4561         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4562             disable libvpx_vp8_encoder;
4563     }
4564     enabled libvpx_vp9_decoder && {
4565         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4566             disable libvpx_vp9_decoder;
4567     }
4568     enabled libvpx_vp9_encoder && {
4569         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4570             disable libvpx_vp9_encoder;
4571     }
4572     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4573         die "libvpx enabled but no supported decoders found"
4574     fi
4575 }
4576 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4577 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4578 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4579                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4580                                die "ERROR: libx264 version must be >= 0.118."; } &&
4581                              { check_cpp_condition x264.h "X264_MPEG2" &&
4582                                enable libx262; }
4583 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4584                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4585                                die "ERROR: libx265 version must be >= 57."; }
4586 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4587 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4588 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4589                                 { ! enabled cross_compile && {
4590                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4591                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4592                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4593                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4594                                die "ERROR: mmal not found"; }
4595 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4596                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4597                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4598                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4599                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4600                                die "ERROR: openssl not found"; }
4601
4602 if enabled gnutls; then
4603     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4604     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4605 fi
4606
4607 # libdc1394 check
4608 if enabled libdc1394; then
4609     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4610         enable libdc1394_2; } ||
4611     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4612         enable libdc1394_1; } ||
4613     die "ERROR: No version of libdc1394 found "
4614 fi
4615
4616 if enabled nvenc; then
4617     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found.";
4618     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4619     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4620         die "ERROR: NVENC API version 4 or older is not supported";
4621 fi
4622
4623 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4624     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4625     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4626     enable sdl
4627 fi
4628
4629 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4630 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4631
4632 check_header linux/fb.h
4633 check_header linux/videodev2.h
4634 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4635
4636 check_header AVFoundation/AVFoundation.h &&
4637     check_objcflags -fobjc-arc &&
4638     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4639     disable AVFoundation_AVFoundation_h
4640
4641 check_header sys/videoio.h
4642
4643 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4644 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4645 # w32api 3.12 had it defined wrong
4646 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4647
4648 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4649 { check_header dev/bktr/ioctl_meteor.h &&
4650   check_header dev/bktr/ioctl_bt848.h; } ||
4651 { check_header machine/ioctl_meteor.h &&
4652   check_header machine/ioctl_bt848.h; } ||
4653 { check_header dev/video/meteor/ioctl_meteor.h &&
4654   check_header dev/video/bktr/ioctl_bt848.h; } ||
4655 check_header dev/ic/bt8xx.h
4656
4657 check_header sndio.h
4658 check_header sys/soundcard.h
4659 check_header soundcard.h
4660
4661 enabled_any alsa_indev alsa_outdev &&
4662     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4663
4664 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4665     check_func jack_port_get_latency_range -ljack
4666
4667 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4668
4669 if enabled libcdio; then
4670     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4671     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4672     die "ERROR: No usable libcdio/cdparanoia found"
4673 fi
4674
4675 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4676
4677 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4678     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4679         enabled libxcb && die "ERROR: libxcb not found";
4680     } && disable x11grab && enable libxcb
4681
4682     disabled libxcb_shm ||
4683         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4684             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4685         } && check_header sys/shm.h && enable libxcb_shm
4686
4687     disabled libxcb_xfixes ||
4688         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4689             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4690         } && enable libxcb_xfixes
4691
4692     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4693     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4694 fi
4695
4696 if enabled x11grab; then
4697     enabled xlib || die "ERROR: Xlib not found"
4698     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4699     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4700 fi
4701
4702 enabled vaapi &&
4703     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4704     disable vaapi
4705
4706 if enabled vaapi ; then
4707     enabled xlib &&
4708     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4709     enable vaapi_x11
4710
4711     check_lib2 "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4712     enable vaapi_drm
4713 fi
4714
4715 enabled vdpau &&
4716     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4717     disable vdpau
4718
4719 enabled vdpau && enabled xlib &&
4720     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4721     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4722     enable vdpau_x11
4723
4724 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4725
4726 # add some useful compiler flags if supported
4727 check_cflags -Wdeclaration-after-statement
4728 check_cflags -Wall
4729 check_cflags -Wdisabled-optimization
4730 check_cflags -Wpointer-arith
4731 check_cflags -Wredundant-decls
4732 check_cflags -Wwrite-strings
4733 check_cflags -Wtype-limits
4734 check_cflags -Wundef
4735 check_cflags -Wmissing-prototypes
4736 check_cflags -Wstrict-prototypes
4737 enabled extra_warnings && check_cflags -Winline
4738 enabled extra_warnings && check_cflags -Wcast-qual
4739
4740 check_disable_warning(){
4741     warning_flag=-W${1#-Wno-}
4742     test_cflags $warning_flag && add_cflags $1
4743 }
4744
4745 check_disable_warning -Wno-parentheses
4746 check_disable_warning -Wno-switch
4747 check_disable_warning -Wno-format-zero-length
4748 check_disable_warning -Wno-pointer-sign
4749
4750 # add some linker flags
4751 check_ldflags -Wl,--warn-common
4752 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4753 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4754 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4755
4756 # add some strip flags
4757 # -wN '..@*' is more selective than -x, but not available everywhere.
4758 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4759
4760 enabled neon_clobber_test &&
4761     check_ldflags -Wl,--wrap,avcodec_open2              \
4762                   -Wl,--wrap,avcodec_decode_audio4      \
4763                   -Wl,--wrap,avcodec_decode_video2      \
4764                   -Wl,--wrap,avcodec_decode_subtitle2   \
4765                   -Wl,--wrap,avcodec_encode_audio2      \
4766                   -Wl,--wrap,avcodec_encode_video2      \
4767                   -Wl,--wrap,avcodec_encode_subtitle    \
4768                   -Wl,--wrap,avresample_convert ||
4769     disable neon_clobber_test
4770
4771 enabled xmm_clobber_test &&
4772     check_ldflags -Wl,--wrap,avcodec_open2              \
4773                   -Wl,--wrap,avcodec_decode_audio4      \
4774                   -Wl,--wrap,avcodec_decode_video2      \
4775                   -Wl,--wrap,avcodec_decode_subtitle2   \
4776                   -Wl,--wrap,avcodec_encode_audio2      \
4777                   -Wl,--wrap,avcodec_encode_video2      \
4778                   -Wl,--wrap,avcodec_encode_subtitle    \
4779                   -Wl,--wrap,avresample_convert         \
4780                   -Wl,--wrap,sws_scale ||
4781     disable xmm_clobber_test
4782
4783 echo "X { local: *; };" > $TMPV
4784 if test_ldflags -Wl,--version-script,$TMPV; then
4785     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4786 elif test_ldflags -Wl,-M,$TMPV; then
4787     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4788 fi
4789
4790 check_cc <<EOF && enable symver_asm_label
4791 void ff_foo(void) __asm__ ("av_foo@VERSION");
4792 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4793 EOF
4794     check_cc <<EOF && enable symver_gnu_asm
4795 __asm__(".symver ff_foo,av_foo@VERSION");
4796 void ff_foo(void) {}
4797 EOF
4798
4799 if [ -z "$optflags" ]; then
4800     if enabled small; then
4801         optflags=$cflags_size
4802     elif enabled optimizations; then
4803         optflags=$cflags_speed
4804     else
4805         optflags=$cflags_noopt
4806     fi
4807 fi
4808
4809 check_optflags(){
4810     check_cflags "$@"
4811     enabled lto && check_ldflags "$@"
4812 }
4813
4814
4815 if enabled lto; then
4816     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4817     check_cflags  -flto
4818     check_ldflags -flto $cpuflags
4819 fi
4820
4821 check_optflags $optflags
4822 check_optflags -fno-math-errno
4823 check_optflags -fno-signed-zeros
4824
4825 if enabled icc; then
4826     # Just warnings, no remarks
4827     check_cflags -w1
4828     # -wd: Disable following warnings
4829     # 144, 167, 556: -Wno-pointer-sign
4830     # 1292: attribute "foo" ignored
4831     # 1419: external declaration in primary source file
4832     # 10006: ignoring unknown option -fno-signed-zeros
4833     # 10148: ignoring unknown option -Wno-parentheses
4834     # 10156: ignoring option '-W'; no argument required
4835     check_cflags -wd144,167,556,1292,1419,10006,10148,10156
4836     # 11030:&n