configure: Restore the --enable-everything behaviour
[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-frei0r          enable frei0r video filtering
183   --enable-gnutls          enable gnutls [no]
184   --enable-libbs2b         enable bs2b DSP library [no]
185   --enable-libcdio         enable audio CD grabbing with libcdio
186   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
187                            and libraw1394 [no]
188   --enable-libdcadec       enable DCA decoding via libdcadec [no]
189   --enable-libfaac         enable AAC encoding via libfaac [no]
190   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
191   --enable-libfreetype     enable libfreetype [no]
192   --enable-libgsm          enable GSM de/encoding via libgsm [no]
193   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
194   --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
195   --enable-libmfx          enable HW acceleration through libmfx
196   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
197   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
198   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
199   --enable-libopencv       enable video filtering via libopencv [no]
200   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
201   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
202   --enable-libopus         enable Opus de/encoding via libopus [no]
203   --enable-libpulse        enable Pulseaudio input via libpulse [no]
204   --enable-librtmp         enable RTMP[E] support via librtmp [no]
205   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
206   --enable-libsnappy       enable Snappy compression [no]
207   --enable-libspeex        enable Speex de/encoding via libspeex [no]
208   --enable-libtheora       enable Theora encoding via libtheora [no]
209   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
210   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
211   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
212   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
213   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
214   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
215   --enable-libwebp         enable WebP encoding via libwebp [no]
216   --enable-libx264         enable H.264 encoding via x264 [no]
217   --enable-libx265         enable HEVC encoding via x265 [no]
218   --enable-libxavs         enable AVS encoding via xavs [no]
219   --enable-libxcb          enable X11 grabbing using XCB [no]
220   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
221   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
222   --enable-libxvid         enable Xvid encoding via xvidcore,
223                            native MPEG-4/Xvid encoder exists [no]
224   --enable-mmal            enable decoding via MMAL [no]
225   --enable-nvenc           enable encoding via NVENC [no]
226   --enable-openssl         enable openssl [no]
227   --enable-x11grab         enable X11 grabbing (legacy) [no]
228   --enable-zlib            enable zlib [autodetect]
229
230 Toolchain options:
231   --arch=ARCH              select architecture [$arch]
232   --cpu=CPU                select the minimum required CPU (affects
233                            instruction selection, may crash on older CPUs)
234   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
235   --enable-cross-compile   assume a cross-compiler is used
236   --sysroot=PATH           root of cross-build tree
237   --sysinclude=PATH        location of cross-build system headers
238   --target-os=OS           compiler targets OS [$target_os]
239   --target-exec=CMD        command to run executables on target
240   --target-path=DIR        path to view of build directory on target
241   --target-samples=DIR     path to samples directory on target
242   --toolchain=NAME         set tool defaults according to NAME
243   --nm=NM                  use nm tool
244   --ar=AR                  use archive tool AR [$ar_default]
245   --as=AS                  use assembler AS [$as_default]
246   --cc=CC                  use C compiler CC [$cc_default]
247   --objcc=OCC              use ObjC compiler OCC [$cc_default]
248   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
249   --ld=LD                  use linker LD
250   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
251   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
252   --host-cc=HOSTCC         use host C compiler HOSTCC
253   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
254   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
255   --host-ld=HOSTLD         use host linker HOSTLD
256   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
257   --host-libs=HLIBS        use libs HLIBS when linking for host
258   --host-os=OS             compiler host OS [$target_os]
259   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
260   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
261   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
262   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
263   --extra-libs=ELIBS       add ELIBS [$ELIBS]
264   --extra-version=STRING   version string suffix []
265   --optflags=OPTFLAGS      override optimization-related compiler flags
266   --build-suffix=SUFFIX    library name suffix []
267   --enable-pic             build position-independent code
268   --enable-thumb           compile for Thumb instruction set
269   --enable-lto             use link-time optimization
270   --env="ENV=override"     override the environment variables
271
272 Advanced options (experts only):
273   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
274   --custom-allocator=NAME  use a supported custom allocator
275   --disable-symver         disable symbol versioning
276   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
277   --disable-safe-bitstream-reader
278                            disable buffer boundary checking in bitreaders
279                            (faster, but may crash)
280   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
281   --enable-sram            allow use of on-chip SRAM
282
283 Optimization options (experts only):
284   --disable-asm            disable all assembly optimizations
285   --disable-altivec        disable AltiVec optimizations
286   --disable-vsx            disable VSX optimizations
287   --disable-power8         disable POWER8 optimizations
288   --disable-amd3dnow       disable 3DNow! optimizations
289   --disable-amd3dnowext    disable 3DNow! extended optimizations
290   --disable-mmx            disable MMX optimizations
291   --disable-mmxext         disable MMXEXT optimizations
292   --disable-sse            disable SSE optimizations
293   --disable-sse2           disable SSE2 optimizations
294   --disable-sse3           disable SSE3 optimizations
295   --disable-ssse3          disable SSSE3 optimizations
296   --disable-sse4           disable SSE4 optimizations
297   --disable-sse42          disable SSE4.2 optimizations
298   --disable-avx            disable AVX optimizations
299   --disable-xop            disable XOP optimizations
300   --disable-fma3           disable FMA3 optimizations
301   --disable-fma4           disable FMA4 optimizations
302   --disable-avx2           disable AVX2 optimizations
303   --disable-armv5te        disable armv5te optimizations
304   --disable-armv6          disable armv6 optimizations
305   --disable-armv6t2        disable armv6t2 optimizations
306   --disable-vfp            disable VFP optimizations
307   --disable-neon           disable NEON optimizations
308   --disable-inline-asm     disable use of inline assembly
309   --disable-yasm           disable use of nasm/yasm assembly
310
311 Developer options (useful when working on Libav itself):
312   --disable-debug          disable debugging symbols
313   --enable-debug=LEVEL     set the debug level [$debuglevel]
314   --disable-optimizations  disable compiler optimizations
315   --enable-extra-warnings  enable more compiler warnings
316   --samples=PATH           location of test samples for FATE, if not set use
317                            \$LIBAV_SAMPLES at make invocation time.
318   --enable-neon-clobber-test check NEON registers for clobbering (should be
319                            used only for debugging purposes)
320   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
321                            should be used only for debugging purposes)
322   --enable-random          randomly enable/disable components
323   --disable-random
324   --enable-random=LIST     randomly enable/disable specific components or
325   --disable-random=LIST    component groups. LIST is a comma-separated list
326                            of NAME[:PROB] entries where NAME is a component
327                            (group) and PROB the probability associated with
328                            NAME (default 0.5).
329   --random-seed=VALUE      seed value for --enable/disable-random
330   --disable-valgrind-backtrace do not print a backtrace under Valgrind
331                            (only applies to --disable-optimizations builds)
332
333 NOTE: Object files are built at the place where configure is launched.
334 EOF
335   exit 0
336 }
337
338 quotes='""'
339
340 log(){
341     echo "$@" >> $logfile
342 }
343
344 log_file(){
345     log BEGIN $1
346     i=1
347     while read line; do
348         printf '%5s   %s\n' "${i}" "${line}"
349         i=$(($i+1))
350     done < $1 >> $logfile
351     log END $1
352 }
353
354 echolog(){
355     log "$@"
356     echo "$@"
357 }
358
359 warn(){
360     log "WARNING: $*"
361     WARNINGS="${WARNINGS}WARNING: $*\n"
362 }
363
364 die(){
365     echolog "$@"
366     cat <<EOF
367
368 If you think configure made a mistake, make sure you are using the latest
369 version from Git.  If the latest version fails, report the problem to the
370 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
371 EOF
372     if disabled logging; then
373         cat <<EOF
374 Rerun configure with logging enabled (do not use --disable-logging), and
375 include the log this produces with your report.
376 EOF
377     else
378         cat <<EOF
379 Include the log file "$logfile" produced by configure as this will help
380 solving the problem.
381 EOF
382     fi
383     exit 1
384 }
385
386 # Avoid locale weirdness, besides we really just want to translate ASCII.
387 toupper(){
388     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
389 }
390
391 tolower(){
392     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
393 }
394
395 c_escape(){
396     echo "$*" | sed 's/["\\]/\\\0/g'
397 }
398
399 sh_quote(){
400     v=$(echo "$1" | sed "s/'/'\\\\''/g")
401     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
402     echo "$v"
403 }
404
405 cleanws(){
406     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
407 }
408
409 filter(){
410     pat=$1
411     shift
412     for v; do
413         eval "case $v in $pat) echo $v ;; esac"
414     done
415 }
416
417 filter_out(){
418     pat=$1
419     shift
420     for v; do
421         eval "case $v in $pat) ;; *) echo $v ;; esac"
422     done
423 }
424
425 map(){
426     m=$1
427     shift
428     for v; do eval $m; done
429 }
430
431 add_suffix(){
432     suffix=$1
433     shift
434     for v; do echo ${v}${suffix}; done
435 }
436
437 set_all(){
438     value=$1
439     shift
440     for var in $*; do
441         eval $var=$value
442     done
443 }
444
445 set_weak(){
446     value=$1
447     shift
448     for var; do
449         eval : \${$var:=$value}
450     done
451 }
452
453 sanitize_var_name(){
454     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
455 }
456
457 set_safe(){
458     var=$1
459     shift
460     eval $(sanitize_var_name "$var")='$*'
461 }
462
463 get_safe(){
464     eval echo \$$(sanitize_var_name "$1")
465 }
466
467 pushvar(){
468     for pvar in $*; do
469         eval level=\${${pvar}_level:=0}
470         eval ${pvar}_${level}="\$$pvar"
471         eval ${pvar}_level=$(($level+1))
472     done
473 }
474
475 popvar(){
476     for pvar in $*; do
477         eval level=\${${pvar}_level:-0}
478         test $level = 0 && continue
479         eval level=$(($level-1))
480         eval $pvar="\${${pvar}_${level}}"
481         eval ${pvar}_level=$level
482         eval unset ${pvar}_${level}
483     done
484 }
485
486 enable(){
487     set_all yes $*
488 }
489
490 check_requested() {
491     for var; do
492         eval test "x\$${var#!}_requested" = "xyes" &&  die "${var%%_*} cannot be enabled"
493     done
494 }
495
496 disable(){
497     set_all no $*
498     check_requested $*
499 }
500
501 enable_weak(){
502     set_weak yes $*
503 }
504
505 disable_weak(){
506     set_weak no $*
507 }
508
509 enable_safe(){
510     for var; do
511         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
512     done
513 }
514
515 disable_safe(){
516     for var; do
517         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
518     done
519 }
520
521 do_enable_deep(){
522     for var; do
523         enabled $var && continue
524         eval sel="\$${var}_select"
525         eval sgs="\$${var}_suggest"
526         pushvar var sgs
527         enable_deep $sel
528         popvar sgs
529         enable_deep_weak $sgs
530         popvar var
531     done
532 }
533
534 enable_deep(){
535     do_enable_deep $*
536     enable $*
537 }
538
539 enable_deep_weak(){
540     for var; do
541         disabled $var && continue
542         pushvar var
543         do_enable_deep $var
544         popvar var
545         enable_weak $var
546     done
547 }
548
549 do_enable_deep_force(){
550     for var; do
551         enabled $var && continue
552         eval sel="\$${var}_deps\ \$${var}_deps_any\ \$${var}_select\ \$${var}_suggest\ \$${var}_select_any"
553         pushvar var
554         enable_deep_force $sel
555         popvar var
556     done
557 }
558
559 enable_deep_force(){
560     do_enable_deep_force $*
561     for var; do
562         is_in $var $ALL_COMPONENTS $COMPONENT_LIST $LIBRARY_LIST && enable $var
563     done
564 }
565
566 request(){
567     disable $* # force the refresh of the dependencies
568     for var; do
569         enable ${var}_requested
570     done
571     enable_deep_force $*
572     enable $*
573 }
574
575 enabled(){
576     test "${1#!}" = "$1" && op== || op=!=
577     eval test "x\$${1#!}" $op "xyes"
578 }
579
580 disabled(){
581     test "${1#!}" = "$1" && op== || op=!=
582     eval test "x\$${1#!}" $op "xno"
583 }
584
585 enabled_all(){
586     for opt; do
587         enabled $opt || return 1
588     done
589 }
590
591 disabled_all(){
592     for opt; do
593         disabled $opt || return 1
594     done
595 }
596
597 enabled_any(){
598     for opt; do
599         enabled $opt && return 0
600     done
601 }
602
603 disabled_any(){
604     for opt; do
605         disabled $opt && return 0
606     done
607     return 1
608 }
609
610 set_default(){
611     for opt; do
612         eval : \${$opt:=\$${opt}_default}
613     done
614 }
615
616 is_in(){
617     value=$1
618     shift
619     for var in $*; do
620         [ $var = $value ] && return 0
621     done
622     return 1
623 }
624
625 do_check_deps(){
626     for cfg; do
627         cfg="${cfg#!}"
628         enabled ${cfg}_checking && die "Circular dependency for $cfg."
629         disabled ${cfg}_checking && continue
630         enable ${cfg}_checking
631         append allopts $cfg
632
633         eval dep_all="\$${cfg}_deps"
634         eval dep_any="\$${cfg}_deps_any\ \$${cfg}_select_any"
635         eval dep_sel="\$${cfg}_select"
636         eval dep_sgs="\$${cfg}_suggest"
637         eval dep_ifa="\$${cfg}_if"
638         eval dep_ifn="\$${cfg}_if_any"
639
640         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
641         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
642         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
643
644         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
645         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
646         enabled_all  $dep_all || disable $cfg
647         enabled_any  $dep_any || disable $cfg
648         disabled_any $dep_sel && disable $cfg
649
650         if enabled $cfg; then
651             enable_deep $dep_sel
652             enable_deep_weak $dep_sgs
653         fi
654
655         disable ${cfg}_checking
656     done
657 }
658
659 check_deps(){
660     unset allopts
661
662     do_check_deps "$@"
663
664     for cfg in $allopts; do
665         enabled $cfg || continue
666         eval dep_extralibs="\$${cfg}_extralibs"
667         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
668     done
669 }
670
671 print_config(){
672     pfx=$1
673     files=$2
674     shift 2
675     map 'eval echo "$v \${$v:-no}"' "$@" |
676     awk "BEGIN { split(\"$files\", files) }
677         {
678             c = \"$pfx\" toupper(\$1);
679             v = \$2;
680             sub(/yes/, 1, v);
681             sub(/no/,  0, v);
682             for (f in files) {
683                 file = files[f];
684                 if (file ~ /\\.h\$/) {
685                     printf(\"#define %s %d\\n\", c, v) >>file;
686                 } else if (file ~ /\\.asm\$/) {
687                     printf(\"%%define %s %d\\n\", c, v) >>file;
688                 } else if (file ~ /\\.mak\$/) {
689                     n = -v ? \"\" : \"!\";
690                     printf(\"%s%s=yes\\n\", n, c) >>file;
691                 }
692             }
693         }"
694 }
695
696 print_enabled(){
697     suf=$1
698     shift
699     for v; do
700         enabled $v && printf "%s\n" ${v%$suf};
701     done
702 }
703
704 append(){
705     var=$1
706     shift
707     eval "$var=\"\$$var $*\""
708 }
709
710 prepend(){
711     var=$1
712     shift
713     eval "$var=\"$* \$$var\""
714 }
715
716 unique(){
717     var=$1
718     uniq_list=""
719     for tok in $(eval echo \$$var); do
720         uniq_list="$(filter_out $tok $uniq_list) $tok"
721     done
722     eval "$var=\"${uniq_list}\""
723 }
724
725 add_cppflags(){
726     append CPPFLAGS "$@"
727 }
728
729 add_cflags(){
730     append CFLAGS $($cflags_filter "$@")
731 }
732
733 add_asflags(){
734     append ASFLAGS $($asflags_filter "$@")
735 }
736
737 add_objcflags(){
738     append OBJCFLAGS $($objcflags_filter "$@")
739 }
740
741 add_ldflags(){
742     append LDFLAGS $($ldflags_filter "$@")
743 }
744
745 add_ldexeflags(){
746     append LDEXEFLAGS $($ldflags_filter "$@")
747 }
748
749 add_stripflags(){
750     append STRIPFLAGS "$@"
751 }
752
753 add_extralibs(){
754     prepend extralibs $($ldflags_filter "$@")
755 }
756
757 add_host_cppflags(){
758     append host_cppflags "$@"
759 }
760
761 add_host_cflags(){
762     append host_cflags $($host_cflags_filter "$@")
763 }
764
765 add_host_ldflags(){
766     append host_ldflags $($host_ldflags_filter "$@")
767 }
768
769 add_compat(){
770     append compat_objs $1
771     shift
772     map 'add_cppflags -D$v' "$@"
773 }
774
775 check_cmd(){
776     log "$@"
777     "$@" >> $logfile 2>&1
778 }
779
780 cc_o(){
781     eval printf '%s\\n' $CC_O
782 }
783
784 cc_e(){
785     eval printf '%s\\n' $CC_E
786 }
787
788 check_cc(){
789     log check_cc "$@"
790     cat > $TMPC
791     log_file $TMPC
792     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
793 }
794
795 check_objcc(){
796     log check_objcc "$@"
797     cat > $TMPC
798     log_file $TMPC
799     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
800 }
801
802 check_cpp(){
803     log check_cpp "$@"
804     cat > $TMPC
805     log_file $TMPC
806     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
807 }
808
809 as_o(){
810     eval printf '%s\\n' $AS_O
811 }
812
813 check_as(){
814     log check_as "$@"
815     cat > $TMPS
816     log_file $TMPS
817     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
818 }
819
820 check_inline_asm(){
821     log check_inline_asm "$@"
822     name="$1"
823     code="$2"
824     shift 2
825     disable $name
826     check_cc "$@" <<EOF && enable $name
827 void foo(void){ __asm__ volatile($code); }
828 EOF
829 }
830
831 check_insn(){
832     log check_insn "$@"
833     check_inline_asm ${1}_inline "\"$2\""
834     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
835 }
836
837 check_yasm(){
838     log check_yasm "$@"
839     echo "$1" > $TMPS
840     log_file $TMPS
841     shift 1
842     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
843 }
844
845 ld_o(){
846     eval printf '%s\\n' $LD_O
847 }
848
849 check_ld(){
850     log check_ld "$@"
851     flags=$(filter_out '-l*' "$@")
852     libs=$(filter '-l*' "$@")
853     check_cc $($cflags_filter $flags) || return
854     flags=$($ldflags_filter $flags)
855     libs=$($ldflags_filter $libs)
856     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
857 }
858
859 print_include(){
860     hdr=$1
861     test "${hdr%.h}" = "${hdr}" &&
862         echo "#include $hdr"    ||
863         echo "#include <$hdr>"
864 }
865
866 check_code(){
867     log check_code "$@"
868     check=$1
869     headers=$2
870     code=$3
871     shift 3
872     {
873         for hdr in $headers; do
874             print_include $hdr
875         done
876         echo "int main(void) { $code; return 0; }"
877     } | check_$check "$@"
878 }
879
880 check_cppflags(){
881     log check_cppflags "$@"
882     check_cc "$@" <<EOF && append CPPFLAGS "$@"
883 int x;
884 EOF
885 }
886
887 test_cflags(){
888     log test_cflags "$@"
889     set -- $($cflags_filter "$@")
890     check_cc "$@" <<EOF
891 int x;
892 EOF
893 }
894
895 check_cflags(){
896     log check_cflags "$@"
897     test_cflags "$@" && add_cflags "$@"
898 }
899
900 test_objcflags(){
901     log test_cflags "$@"
902     set -- $($cflags_filter "$@")
903     check_objcc "$@" <<EOF
904 int x;
905 EOF
906 }
907
908 check_objcflags(){
909     log check_cflags "$@"
910     test_objcflags "$@" && add_objcflags "$@"
911 }
912
913 test_ldflags(){
914     log test_ldflags "$@"
915     check_ld "$@" <<EOF
916 int main(void){ return 0; }
917 EOF
918 }
919
920 check_ldflags(){
921     log check_ldflags "$@"
922     test_ldflags "$@" && add_ldflags "$@"
923 }
924
925 test_stripflags(){
926     log test_stripflags "$@"
927     # call check_cc to get a fresh TMPO
928     check_cc <<EOF
929 int main(void) { return 0; }
930 EOF
931     check_cmd $strip $STRIPFLAGS "$@" $TMPO
932 }
933
934 check_stripflags(){
935     log check_stripflags "$@"
936     test_stripflags "$@" && add_stripflags "$@"
937 }
938
939 check_header(){
940     log check_header "$@"
941     header=$1
942     shift
943     disable_safe $header
944     check_cpp "$@" <<EOF && enable_safe $header
945 #include <$header>
946 int x;
947 EOF
948 }
949
950 check_func(){
951     log check_func "$@"
952     func=$1
953     shift
954     disable $func
955     check_ld "$@" <<EOF && enable $func
956 extern int $func();
957 int main(void){ $func(); }
958 EOF
959 }
960
961 check_mathfunc(){
962     log check_mathfunc "$@"
963     func=$1
964     narg=$2
965     shift 2
966     test $narg = 2 && args="f, g" || args="f"
967     disable $func
968     check_ld "$@" <<EOF && enable $func
969 #include <math.h>
970 float foo(float f, float g) { return $func($args); }
971 int main(void){ return 0; }
972 EOF
973 }
974
975 check_func_headers(){
976     log check_func_headers "$@"
977     headers=$1
978     funcs=$2
979     shift 2
980     {
981         for hdr in $headers; do
982             print_include $hdr
983         done
984         for func in $funcs; do
985             echo "long check_$func(void) { return (long) $func; }"
986         done
987         echo "int main(void) { return 0; }"
988     } | check_ld "$@" && enable $funcs && enable_safe $headers
989 }
990
991 check_cpp_condition(){
992     log check_cpp_condition "$@"
993     header=$1
994     condition=$2
995     shift 2
996     check_cpp "$@" <<EOF
997 #include <$header>
998 #if !($condition)
999 #error "unsatisfied condition: $condition"
1000 #endif
1001 EOF
1002 }
1003
1004 check_lib(){
1005     log check_lib "$@"
1006     header="$1"
1007     func="$2"
1008     shift 2
1009     check_header $header && check_func $func "$@" && add_extralibs "$@"
1010 }
1011
1012 check_lib2(){
1013     log check_lib2 "$@"
1014     headers="$1"
1015     funcs="$2"
1016     shift 2
1017     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1018 }
1019
1020 check_pkg_config(){
1021     log check_pkg_config "$@"
1022     pkg="$1"
1023     headers="$2"
1024     funcs="$3"
1025     shift 3
1026     check_cmd $pkg_config --exists --print-errors $pkg || return
1027     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1028     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1029     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1030         set_safe "${pkg}_cflags" $pkg_cflags   &&
1031         set_safe "${pkg}_libs"   $pkg_libs
1032 }
1033
1034 check_exec(){
1035     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1036 }
1037
1038 check_exec_crash(){
1039     code=$(cat)
1040
1041     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1042     # are safe but may not be available everywhere.  Thus we use
1043     # raise(SIGTERM) instead.  The check is run in a subshell so we
1044     # can redirect the "Terminated" message from the shell.  SIGBUS
1045     # is not defined by standard C so it is used conditionally.
1046
1047     (check_exec "$@") >> $logfile 2>&1 <<EOF
1048 #include <signal.h>
1049 static void sighandler(int sig){
1050     raise(SIGTERM);
1051 }
1052 int foo(void){
1053     $code
1054 }
1055 int (*func_ptr)(void) = foo;
1056 int main(void){
1057     signal(SIGILL, sighandler);
1058     signal(SIGFPE, sighandler);
1059     signal(SIGSEGV, sighandler);
1060 #ifdef SIGBUS
1061     signal(SIGBUS, sighandler);
1062 #endif
1063     return func_ptr();
1064 }
1065 EOF
1066 }
1067
1068 check_type(){
1069     log check_type "$@"
1070     headers=$1
1071     type=$2
1072     shift 2
1073     disable_safe "$type"
1074     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1075 }
1076
1077 check_struct(){
1078     log check_struct "$@"
1079     headers=$1
1080     struct=$2
1081     member=$3
1082     shift 3
1083     disable_safe "${struct}_${member}"
1084     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1085         enable_safe "${struct}_${member}"
1086 }
1087
1088 check_builtin(){
1089     log check_builtin "$@"
1090     name=$1
1091     headers=$2
1092     builtin=$3
1093     shift 3
1094     disable "$name"
1095     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1096 }
1097
1098 check_compile_assert(){
1099     log check_compile_assert "$@"
1100     name=$1
1101     headers=$2
1102     condition=$3
1103     shift 3
1104     disable "$name"
1105     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1106 }
1107
1108 require(){
1109     name="$1"
1110     header="$2"
1111     func="$3"
1112     shift 3
1113     check_lib $header $func "$@" || die "ERROR: $name not found"
1114 }
1115
1116 require2(){
1117     name="$1"
1118     headers="$2"
1119     func="$3"
1120     shift 3
1121     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1122 }
1123
1124 require_pkg_config(){
1125     pkg="$1"
1126     check_pkg_config "$@" || die "ERROR: $pkg not found"
1127     add_cflags    $(get_safe "${pkg}_cflags")
1128     add_extralibs $(get_safe "${pkg}_libs")
1129 }
1130
1131 hostcc_e(){
1132     eval printf '%s\\n' $HOSTCC_E
1133 }
1134
1135 hostcc_o(){
1136     eval printf '%s\\n' $HOSTCC_O
1137 }
1138
1139 check_host_cc(){
1140     log check_host_cc "$@"
1141     cat > $TMPC
1142     log_file $TMPC
1143     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1144 }
1145
1146 check_host_cpp(){
1147     log check_host_cpp "$@"
1148     cat > $TMPC
1149     log_file $TMPC
1150     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1151 }
1152
1153 check_host_cppflags(){
1154     log check_host_cppflags "$@"
1155     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1156 int x;
1157 EOF
1158 }
1159
1160 check_host_cflags(){
1161     log check_host_cflags "$@"
1162     set -- $($host_cflags_filter "$@")
1163     check_host_cc "$@" <<EOF && append host_cflags "$@"
1164 int x;
1165 EOF
1166 }
1167
1168 check_host_cpp_condition(){
1169     log check_host_cpp_condition "$@"
1170     header=$1
1171     condition=$2
1172     shift 2
1173     check_host_cpp "$@" <<EOF
1174 #include <$header>
1175 #if !($condition)
1176 #error "unsatisfied condition: $condition"
1177 #endif
1178 EOF
1179 }
1180
1181 apply(){
1182     file=$1
1183     shift
1184     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1185 }
1186
1187 cp_if_changed(){
1188     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1189     mkdir -p "$(dirname $2)"
1190     $cp_f "$1" "$2"
1191 }
1192
1193 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1194 # system-dependent things.
1195
1196 AVCODEC_COMPONENTS="
1197     bsfs
1198     decoders
1199     encoders
1200     hwaccels
1201     parsers
1202 "
1203
1204 AVDEVICE_COMPONENTS="
1205     indevs
1206     outdevs
1207 "
1208 AVFILTER_COMPONENTS="
1209     filters
1210 "
1211 AVFORMAT_COMPONENTS="
1212     demuxers
1213     muxers
1214     protocols
1215 "
1216
1217 AVRESAMPLE_COMPONENTS=""
1218 AVUTIL_COMPONENTS=""
1219
1220 COMPONENT_LIST="
1221     $AVCODEC_COMPONENTS
1222     $AVDEVICE_COMPONENTS
1223     $AVFILTER_COMPONENTS
1224     $AVFORMAT_COMPONENTS
1225     $AVRESAMPLE_COMPONENTS
1226     $AVUTIL_COMPONENTS
1227 "
1228
1229 EXAMPLE_LIST="
1230     avcodec_example
1231     filter_audio_example
1232     metadata_example
1233     output_example
1234     qsvdec_example
1235     transcode_aac_example
1236 "
1237
1238 EXTERNAL_LIBRARY_LIST="
1239     avisynth
1240     bzlib
1241     frei0r
1242     gnutls
1243     libbs2b
1244     libcdio
1245     libdc1394
1246     libdcadec
1247     libfaac
1248     libfdk_aac
1249     libfontconfig
1250     libfreetype
1251     libgsm
1252     libilbc
1253     libkvazaar
1254     libmfx
1255     libmp3lame
1256     libopencore_amrnb
1257     libopencore_amrwb
1258     libopencv
1259     libopenh264
1260     libopenjpeg
1261     libopus
1262     libpulse
1263     librtmp
1264     libschroedinger
1265     libsnappy
1266     libspeex
1267     libtheora
1268     libtwolame
1269     libvo_aacenc
1270     libvo_amrwbenc
1271     libvorbis
1272     libvpx
1273     libwavpack
1274     libwebp
1275     libx264
1276     libx265
1277     libxavs
1278     libxcb
1279     libxcb_shm
1280     libxcb_xfixes
1281     libxvid
1282     mmal
1283     nvenc
1284     openssl
1285     x11grab
1286     zlib
1287 "
1288
1289 FEATURE_LIST="
1290     gray
1291     hardcoded_tables
1292     runtime_cpudetect
1293     safe_bitstream_reader
1294     shared
1295     small
1296     sram
1297     static
1298     swscale_alpha
1299 "
1300
1301 HWACCEL_LIST="
1302     d3d11va
1303     dxva2
1304     vaapi
1305     vda
1306     vdpau
1307 "
1308
1309 LIBRARY_LIST="
1310     avcodec
1311     avdevice
1312     avfilter
1313     avformat
1314     avresample
1315     avutil
1316     swscale
1317 "
1318
1319 LICENSE_LIST="
1320     gpl
1321     nonfree
1322     version3
1323 "
1324
1325 PROGRAM_LIST="
1326     avconv
1327     avplay
1328     avprobe
1329 "
1330
1331 SUBSYSTEM_LIST="
1332     dct
1333     doc
1334     error_resilience
1335     faan
1336     fft
1337     lsp
1338     lzo
1339     mdct
1340     network
1341     rdft
1342 "
1343
1344 CONFIG_LIST="
1345     $COMPONENT_LIST
1346     $EXAMPLE_LIST
1347     $EXTERNAL_LIBRARY_LIST
1348     $FEATURE_LIST
1349     $HWACCEL_LIST
1350     $LICENSE_LIST
1351     $LIBRARY_LIST
1352     $PROGRAM_LIST
1353     $SUBSYSTEM_LIST
1354     memalign_hack
1355     neon_clobber_test
1356     pic
1357     pod2man
1358     texi2html
1359     thumb
1360     valgrind_backtrace
1361     xmm_clobber_test
1362 "
1363
1364 THREADS_LIST="
1365     pthreads
1366     w32threads
1367 "
1368
1369 ATOMICS_LIST="
1370     atomics_gcc
1371     atomics_suncc
1372     atomics_win32
1373 "
1374
1375 ARCH_LIST="
1376     aarch64
1377     alpha
1378     arm
1379     avr32
1380     avr32_ap
1381     avr32_uc
1382     bfin
1383     ia64
1384     m68k
1385     mips
1386     mips64
1387     parisc
1388     ppc
1389     ppc64
1390     s390
1391     sh4
1392     sparc
1393     sparc64
1394     tilegx
1395     tilepro
1396     tomi
1397     x86
1398     x86_32
1399     x86_64
1400 "
1401
1402 ARCH_EXT_LIST_ARM="
1403     armv5te
1404     armv6
1405     armv6t2
1406     armv8
1407     neon
1408     vfp
1409     vfpv3
1410 "
1411
1412 ARCH_EXT_LIST_X86_SIMD="
1413     amd3dnow
1414     amd3dnowext
1415     avx
1416     avx2
1417     fma3
1418     fma4
1419     mmx
1420     mmxext
1421     sse
1422     sse2
1423     sse3
1424     sse4
1425     sse42
1426     ssse3
1427     xop
1428 "
1429
1430 ARCH_EXT_LIST_PPC="
1431     altivec
1432     dcbzl
1433     ldbrx
1434     power8
1435     ppc4xx
1436     vsx
1437 "
1438
1439 ARCH_EXT_LIST_X86="
1440     $ARCH_EXT_LIST_X86_SIMD
1441     cpunop
1442     i686
1443 "
1444
1445 ARCH_EXT_LIST_MIPS="
1446     loongson
1447     mips32r1
1448     mips64r1
1449     mips32r2
1450     mips64r2
1451     mips32r6
1452     mips64r6
1453 "
1454
1455 ARCH_EXT_LIST="
1456     $ARCH_EXT_LIST_ARM
1457     $ARCH_EXT_LIST_MIPS
1458     $ARCH_EXT_LIST_PPC
1459     $ARCH_EXT_LIST_X86
1460     vis
1461 "
1462
1463 ARCH_FEATURES="
1464     aligned_stack
1465     fast_64bit
1466     fast_clz
1467     fast_cmov
1468     local_aligned_8
1469     local_aligned_16
1470     simd_align_16
1471 "
1472
1473 BUILTIN_LIST="
1474     atomic_cas_ptr
1475     machine_rw_barrier
1476     MemoryBarrier
1477     mm_empty
1478     rdtsc
1479     sync_val_compare_and_swap
1480 "
1481 HAVE_LIST_CMDLINE="
1482     inline_asm
1483     symver
1484     yasm
1485 "
1486
1487 HAVE_LIST_PUB="
1488     bigendian
1489     fast_unaligned
1490 "
1491
1492 HEADERS_LIST="
1493     AVFoundation_AVFoundation_h
1494     alsa_asoundlib_h
1495     altivec_h
1496     arpa_inet_h
1497     cdio_paranoia_h
1498     cdio_paranoia_paranoia_h
1499     dev_bktr_ioctl_bt848_h
1500     dev_bktr_ioctl_meteor_h
1501     dev_ic_bt8xx_h
1502     dev_video_bktr_ioctl_bt848_h
1503     dev_video_meteor_ioctl_meteor_h
1504     direct_h
1505     dlfcn_h
1506     d3d11_h
1507     dxva_h
1508     gsm_h
1509     io_h
1510     mach_mach_time_h
1511     machine_ioctl_bt848_h
1512     machine_ioctl_meteor_h
1513     malloc_h
1514     poll_h
1515     sndio_h
1516     soundcard_h
1517     sys_mman_h
1518     sys_param_h
1519     sys_resource_h
1520     sys_select_h
1521     sys_soundcard_h
1522     sys_time_h
1523     sys_un_h
1524     sys_videoio_h
1525     unistd_h
1526     valgrind_valgrind_h
1527     windows_h
1528     winsock2_h
1529 "
1530
1531 INTRINSICS_LIST="
1532     intrinsics_neon
1533 "
1534
1535 MATH_FUNCS="
1536     atanf
1537     atan2f
1538     cbrtf
1539     cosf
1540     exp2
1541     exp2f
1542     expf
1543     isinf
1544     isnan
1545     ldexpf
1546     llrint
1547     llrintf
1548     log2
1549     log2f
1550     log10f
1551     lrint
1552     lrintf
1553     powf
1554     rint
1555     round
1556     roundf
1557     sinf
1558     trunc
1559     truncf
1560 "
1561
1562 SYSTEM_FUNCS="
1563     aligned_malloc
1564     clock_gettime
1565     closesocket
1566     CommandLineToArgvW
1567     CoTaskMemFree
1568     CryptGenRandom
1569     dlopen
1570     fcntl
1571     flt_lim
1572     fork
1573     getaddrinfo
1574     gethrtime
1575     getopt
1576     GetProcessAffinityMask
1577     GetProcessMemoryInfo
1578     GetProcessTimes
1579     getrusage
1580     GetSystemTimeAsFileTime
1581     gettimeofday
1582     gmtime_r
1583     inet_aton
1584     isatty
1585     jack_port_get_latency_range
1586     LoadLibrary
1587     localtime_r
1588     mach_absolute_time
1589     MapViewOfFile
1590     memalign
1591     mkstemp
1592     mmap
1593     mprotect
1594     nanosleep
1595     posix_memalign
1596     sched_getaffinity
1597     SetConsoleTextAttribute
1598     setmode
1599     setrlimit
1600     Sleep
1601     strerror_r
1602     sysconf
1603     sysctl
1604     usleep
1605     VirtualAlloc
1606 "
1607
1608 TOOLCHAIN_FEATURES="
1609     as_dn_directive
1610     as_func
1611     as_object_arch
1612     asm_mod_q
1613     attribute_may_alias
1614     attribute_packed
1615     ebp_available
1616     ebx_available
1617     gnu_as
1618     ibm_asm
1619     inline_asm_labels
1620     pragma_deprecated
1621     symver_asm_label
1622     symver_gnu_asm
1623     vfp_args
1624     xform_asm
1625     xmm_clobbers
1626 "
1627
1628 TYPES_LIST="
1629     CONDITION_VARIABLE_Ptr
1630     socklen_t
1631     struct_addrinfo
1632     struct_group_source_req
1633     struct_ip_mreq_source
1634     struct_ipv6_mreq
1635     struct_pollfd
1636     struct_rusage_ru_maxrss
1637     struct_sockaddr_in6
1638     struct_sockaddr_sa_len
1639     struct_sockaddr_storage
1640     struct_v4l2_frmivalenum_discrete
1641 "
1642
1643 HAVE_LIST="
1644     $ARCH_EXT_LIST
1645     $(add_suffix _external $ARCH_EXT_LIST)
1646     $(add_suffix _inline   $ARCH_EXT_LIST)
1647     $ARCH_FEATURES
1648     $ATOMICS_LIST
1649     $BUILTIN_LIST
1650     $HAVE_LIST_CMDLINE
1651     $HAVE_LIST_PUB
1652     $HEADERS_LIST
1653     $INTRINSICS_LIST
1654     $MATH_FUNCS
1655     $SYSTEM_FUNCS
1656     $THREADS_LIST
1657     $TOOLCHAIN_FEATURES
1658     $TYPES_LIST
1659     atomics_native
1660     dos_paths
1661     dxva2_lib
1662     libc_msvcrt
1663     libdc1394_1
1664     libdc1394_2
1665     sdl
1666     section_data_rel_ro
1667     threads
1668     vaapi_x11
1669     vdpau_x11
1670     xlib
1671 "
1672
1673 # options emitted with CONFIG_ prefix but not available on the command line
1674 CONFIG_EXTRA="
1675     aandcttables
1676     ac3dsp
1677     audio_frame_queue
1678     audiodsp
1679     blockdsp
1680     bswapdsp
1681     cabac
1682     dirac_parse
1683     dvprofile
1684     faandct
1685     faanidct
1686     fdctdsp
1687     flacdsp
1688     fmtconvert
1689     g722dsp
1690     gcrypt
1691     gmp
1692     golomb
1693     gplv3
1694     h263dsp
1695     h264chroma
1696     h264dsp
1697     h264pred
1698     h264qpel
1699     hpeldsp
1700     huffman
1701     huffyuvdsp
1702     huffyuvencdsp
1703     idctdsp
1704     iirfilter
1705     imdct15
1706     intrax8
1707     ividsp
1708     jpegtables
1709     libx262
1710     lgplv3
1711     lpc
1712     lzf
1713     me_cmp
1714     mpeg_er
1715     mpegaudio
1716     mpegaudiodsp
1717     mpegvideo
1718     mpegvideoenc
1719     mss34dsp
1720     pixblockdsp
1721     qpeldsp
1722     qsv
1723     qsvdec
1724     qsvenc
1725     rangecoder
1726     riffdec
1727     riffenc
1728     rtpdec
1729     rtpenc_chain
1730     rv34dsp
1731     sinewin
1732     snappy
1733     startcode
1734     texturedsp
1735     texturedspenc
1736     tpeldsp
1737     videodsp
1738     vp3dsp
1739     vp56dsp
1740     vp8dsp
1741     wma_freqs
1742     wmv2dsp
1743 "
1744
1745 CMDLINE_SELECT="
1746     $ARCH_EXT_LIST
1747     $CONFIG_LIST
1748     $HAVE_LIST_CMDLINE
1749     $THREADS_LIST
1750     asm
1751     cross_compile
1752     debug
1753     extra_warnings
1754     logging
1755     lto
1756     optimizations
1757     rpath
1758 "
1759
1760 PATHS_LIST="
1761     bindir
1762     datadir
1763     docdir
1764     incdir
1765     libdir
1766     mandir
1767     prefix
1768     shlibdir
1769 "
1770
1771 CMDLINE_SET="
1772     $PATHS_LIST
1773     ar
1774     arch
1775     as
1776     build_suffix
1777     cc
1778     objcc
1779     cpu
1780     cross_prefix
1781     custom_allocator
1782     dep_cc
1783     env
1784     extra_version
1785     host_cc
1786     host_cflags
1787     host_ld
1788     host_ldflags
1789     host_libs
1790     host_os
1791     ld
1792     logfile
1793     malloc_prefix
1794     nm
1795     optflags
1796     pkg_config
1797     pkg_config_flags
1798     random_seed
1799     samples
1800     sysinclude
1801     sysroot
1802     target_exec
1803     target_os
1804     target_path
1805     target_samples
1806     toolchain
1807 "
1808
1809 CMDLINE_APPEND="
1810     extra_cflags
1811     extra_objcflags
1812     host_cppflags
1813 "
1814
1815 # code dependency declarations
1816
1817 # architecture extensions
1818
1819 armv5te_deps="arm"
1820 armv6_deps="arm"
1821 armv6t2_deps="arm"
1822 armv8_deps="aarch64"
1823 neon_deps_any="aarch64 arm"
1824 intrinsics_neon_deps="neon"
1825 vfp_deps_any="aarch64 arm"
1826 vfpv3_deps="vfp"
1827
1828 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1829
1830 altivec_deps="ppc"
1831 ppc4xx_deps="ppc"
1832 vsx_deps="altivec"
1833 power8_deps="vsx"
1834
1835 cpunop_deps="i686"
1836 x86_64_select="i686"
1837 x86_64_suggest="fast_cmov"
1838
1839 amd3dnow_deps="mmx"
1840 amd3dnowext_deps="amd3dnow"
1841 i686_deps="x86"
1842 mmx_deps="x86"
1843 mmxext_deps="mmx"
1844 sse_deps="mmxext"
1845 sse2_deps="sse"
1846 sse3_deps="sse2"
1847 ssse3_deps="sse3"
1848 sse4_deps="ssse3"
1849 sse42_deps="sse4"
1850 avx_deps="sse42"
1851 xop_deps="avx"
1852 fma3_deps="avx"
1853 fma4_deps="avx"
1854 avx2_deps="avx"
1855
1856 mmx_external_deps="yasm"
1857 mmx_inline_deps="inline_asm"
1858 mmx_suggest="mmx_external mmx_inline"
1859
1860 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1861     eval dep=\$${ext}_deps
1862     eval ${ext}_external_deps='"${dep}_external"'
1863     eval ${ext}_inline_deps='"${dep}_inline"'
1864     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1865 done
1866
1867 aligned_stack_if_any="aarch64 ppc x86"
1868 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1869 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1870 fast_unaligned_if_any="aarch64 ppc x86"
1871 simd_align_16_if_any="altivec neon sse"
1872
1873 # system capabilities
1874 symver_if_any="symver_asm_label symver_gnu_asm"
1875 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1876
1877 # threading support
1878 atomics_gcc_if="sync_val_compare_and_swap"
1879 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1880 atomics_win32_if="MemoryBarrier"
1881 atomics_native_if_any="$ATOMICS_LIST"
1882 w32threads_deps="atomics_native"
1883 threads_if_any="$THREADS_LIST"
1884
1885 # subsystems
1886 dct_select="rdft"
1887 dirac_parse_select="golomb"
1888 error_resilience_select="me_cmp"
1889 faandct_deps="faan fdctdsp"
1890 faanidct_deps="faan idctdsp"
1891 intrax8_select="error_resilience"
1892 mdct_select="fft"
1893 rdft_select="fft"
1894 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1895 mpeg_er_select="error_resilience"
1896 mpegaudio_select="mpegaudiodsp"
1897 mpegaudiodsp_select="dct"
1898 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1899 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1900 nvenc_deps_any="dlopen LoadLibrary"
1901 nvenc_extralibs='$ldl'
1902 qsvdec_select="qsv"
1903 qsvenc_select="qsv"
1904
1905 # decoders / encoders
1906 aac_decoder_select="imdct15 mdct sinewin"
1907 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1908 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1909 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1910 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1911 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1912 adpcm_g722_decoder_select="g722dsp"
1913 adpcm_g722_encoder_select="g722dsp"
1914 aic_decoder_select="golomb idctdsp"
1915 alac_encoder_select="lpc"
1916 als_decoder_select="bswapdsp"
1917 amrnb_decoder_select="lsp"
1918 amrwb_decoder_select="lsp"
1919 amv_decoder_select="sp5x_decoder"
1920 ape_decoder_select="bswapdsp"
1921 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1922 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1923 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1924 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1925 atrac1_decoder_select="mdct sinewin"
1926 atrac3_decoder_select="mdct"
1927 atrac3p_decoder_select="mdct sinewin"
1928 bink_decoder_select="blockdsp hpeldsp"
1929 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1930 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1931 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1932 cllc_decoder_select="bswapdsp"
1933 comfortnoise_encoder_select="lpc"
1934 cook_decoder_select="audiodsp mdct sinewin"
1935 cscd_decoder_select="lzo"
1936 cscd_decoder_suggest="zlib"
1937 dca_decoder_select="fmtconvert mdct"
1938 dds_decoder_select="texturedsp"
1939 dnxhd_decoder_select="blockdsp idctdsp"
1940 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1941 dvvideo_decoder_select="dvprofile idctdsp"
1942 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1943 dxa_decoder_deps="zlib"
1944 dxv_decoder_select="lzf texturedsp"
1945 eac3_decoder_select="ac3_decoder"
1946 eac3_encoder_select="ac3_encoder"
1947 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1948 eatgq_decoder_select="aandcttables idctdsp"
1949 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1950 exr_decoder_deps="zlib"
1951 ffv1_decoder_select="golomb rangecoder"
1952 ffv1_encoder_select="rangecoder"
1953 ffvhuff_decoder_select="huffyuv_decoder"
1954 ffvhuff_encoder_select="huffyuv_encoder"
1955 fic_decoder_select="golomb"
1956 flac_decoder_select="flacdsp golomb"
1957 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1958 flashsv_decoder_deps="zlib"
1959 flashsv_encoder_deps="zlib"
1960 flashsv2_decoder_deps="zlib"
1961 flv_decoder_select="h263_decoder"
1962 flv_encoder_select="h263_encoder"
1963 fourxm_decoder_select="blockdsp bswapdsp"
1964 fraps_decoder_select="bswapdsp huffman"
1965 g2m_decoder_deps="zlib"
1966 g2m_decoder_select="blockdsp idctdsp jpegtables"
1967 h261_decoder_select="mpeg_er mpegvideo"
1968 h261_encoder_select="aandcttables mpegvideoenc"
1969 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1970 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1971 h263i_decoder_select="h263_decoder"
1972 h263p_encoder_select="h263_encoder"
1973 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1974 h264_decoder_suggest="error_resilience"
1975 h264_nvenc_encoder_deps="nvenc"
1976 h264_qsv_decoder_deps="libmfx"
1977 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1978 h264_qsv_encoder_deps="libmfx"
1979 h264_qsv_encoder_select="qsvenc"
1980 hap_decoder_select="snappy texturedsp"
1981 hap_encoder_deps="libsnappy"
1982 hap_encoder_select="texturedspenc"
1983 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1984 hevc_nvenc_encoder_deps="nvenc"
1985 hevc_qsv_encoder_deps="libmfx"
1986 hevc_qsv_decoder_deps="libmfx"
1987 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1988 hevc_qsv_encoder_select="qsvenc"
1989 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1990 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1991 iac_decoder_select="imc_decoder"
1992 imc_decoder_select="bswapdsp fft mdct sinewin"
1993 indeo3_decoder_select="hpeldsp"
1994 indeo4_decoder_select="ividsp"
1995 indeo5_decoder_select="ividsp"
1996 interplay_video_decoder_select="hpeldsp"
1997 jpegls_decoder_select="golomb mjpeg_decoder"
1998 jpegls_encoder_select="golomb"
1999 jv_decoder_select="blockdsp"
2000 lagarith_decoder_select="huffyuvdsp"
2001 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2002 loco_decoder_select="golomb"
2003 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2004 metasound_decoder_select="lsp mdct sinewin"
2005 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2006 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2007 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2008 mjpegb_decoder_select="mjpeg_decoder"
2009 mlp_decoder_select="mlp_parser"
2010 motionpixels_decoder_select="bswapdsp"
2011 mp1_decoder_select="mpegaudio"
2012 mp1float_decoder_select="mpegaudio"
2013 mp2_decoder_select="mpegaudio"
2014 mp2float_decoder_select="mpegaudio"
2015 mp3_decoder_select="mpegaudio"
2016 mp3adu_decoder_select="mpegaudio"
2017 mp3adufloat_decoder_select="mpegaudio"
2018 mp3float_decoder_select="mpegaudio"
2019 mp3on4_decoder_select="mpegaudio"
2020 mp3on4float_decoder_select="mpegaudio"
2021 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2022 mpc8_decoder_select="mpegaudiodsp"
2023 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2024 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2025 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2026 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2027 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2028 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2029 mpeg2_qsv_decoder_deps="libmfx"
2030 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2031 mpeg2_qsv_encoder_deps="libmfx"
2032 mpeg2_qsv_encoder_select="qsvenc"
2033 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2034 mpeg4_encoder_select="h263_encoder"
2035 msa1_decoder_select="mss34dsp"
2036 msmpeg4v1_decoder_select="h263_decoder"
2037 msmpeg4v2_decoder_select="h263_decoder"
2038 msmpeg4v2_encoder_select="h263_encoder"
2039 msmpeg4v3_decoder_select="h263_decoder"
2040 msmpeg4v3_encoder_select="h263_encoder"
2041 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
2042 mts2_decoder_select="mss34dsp"
2043 mxpeg_decoder_select="mjpeg_decoder"
2044 nellymoser_decoder_select="mdct sinewin"
2045 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2046 nuv_decoder_select="idctdsp lzo"
2047 nvenc_h264_encoder_deps="nvenc"
2048 nvenc_hevc_encoder_deps="nvenc"
2049 on2avc_decoder_select="mdct"
2050 opus_decoder_deps="avresample"
2051 opus_decoder_select="imdct15"
2052 png_decoder_deps="zlib"
2053 png_encoder_deps="zlib"
2054 png_encoder_select="huffyuvencdsp"
2055 prores_decoder_select="idctdsp"
2056 prores_encoder_select="fdctdsp"
2057 qcelp_decoder_select="lsp"
2058 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2059 ra_144_encoder_select="audio_frame_queue lpc"
2060 ralf_decoder_select="golomb"
2061 rscc_decoder_deps="zlib"
2062 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2063 rv10_encoder_select="h263_encoder"
2064 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2065 rv20_encoder_select="h263_encoder"
2066 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2067 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2068 screenpresso_decoder_deps="zlib"
2069 shorten_decoder_select="golomb"
2070 sipr_decoder_select="lsp"
2071 sp5x_decoder_select="mjpeg_decoder"
2072 svq1_decoder_select="hpeldsp"
2073 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2074 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
2075 svq3_decoder_suggest="zlib"
2076 tak_decoder_select="audiodsp"
2077 tdsc_decoder_deps="zlib"
2078 tdsc_decoder_select="mjpeg_decoder"
2079 theora_decoder_select="vp3_decoder"
2080 thp_decoder_select="mjpeg_decoder"
2081 tiff_decoder_suggest="zlib"
2082 tiff_encoder_suggest="zlib"
2083 truehd_decoder_select="mlp_decoder"
2084 truemotion2_decoder_select="bswapdsp"
2085 truespeech_decoder_select="bswapdsp"
2086 tscc_decoder_deps="zlib"
2087 txd_decoder_select="texturedsp"
2088 twinvq_decoder_select="mdct lsp sinewin"
2089 utvideo_decoder_select="bswapdsp"
2090 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2091 vble_decoder_select="huffyuvdsp"
2092 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2093 vc1image_decoder_select="vc1_decoder"
2094 vorbis_decoder_select="mdct"
2095 vorbis_encoder_select="mdct"
2096 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2097 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2098 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2099 vp6a_decoder_select="vp6_decoder"
2100 vp6f_decoder_select="vp6_decoder"
2101 vp7_decoder_select="h264pred videodsp vp8dsp"
2102 vp8_decoder_select="h264pred videodsp vp8dsp"
2103 vp9_decoder_select="videodsp"
2104 webp_decoder_select="vp8_decoder"
2105 wmapro_decoder_select="mdct sinewin wma_freqs"
2106 wmav1_decoder_select="mdct sinewin wma_freqs"
2107 wmav1_encoder_select="mdct sinewin wma_freqs"
2108 wmav2_decoder_select="mdct sinewin wma_freqs"
2109 wmav2_encoder_select="mdct sinewin wma_freqs"
2110 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2111 wmv1_decoder_select="h263_decoder"
2112 wmv1_encoder_select="h263_encoder"
2113 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2114 wmv2_encoder_select="h263_encoder wmv2dsp"
2115 wmv3_decoder_select="vc1_decoder"
2116 wmv3image_decoder_select="wmv3_decoder"
2117 zerocodec_decoder_deps="zlib"
2118 zlib_decoder_deps="zlib"
2119 zlib_encoder_deps="zlib"
2120 zmbv_decoder_deps="zlib"
2121 zmbv_encoder_deps="zlib"
2122
2123 # hardware accelerators
2124 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2125 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2126 vaapi_deps="va_va_h"
2127 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2128 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2129 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2130
2131 h263_vaapi_hwaccel_deps="vaapi"
2132 h263_vaapi_hwaccel_select="h263_decoder"
2133 h264_d3d11va_hwaccel_deps="d3d11va"
2134 h264_d3d11va_hwaccel_select="h264_decoder"
2135 h264_dxva2_hwaccel_deps="dxva2"
2136 h264_dxva2_hwaccel_select="h264_decoder"
2137 h264_mmal_decoder_deps="mmal"
2138 h264_mmal_hwaccel_deps="mmal"
2139 h264_mmal_decoder_select="h264_decoder"
2140 h264_mmal_encoder_deps="mmal"
2141 h264_qsv_hwaccel_deps="libmfx"
2142 h264_vaapi_hwaccel_deps="vaapi"
2143 h264_vaapi_hwaccel_select="h264_decoder"
2144 h264_vda_hwaccel_deps="vda"
2145 h264_vda_hwaccel_select="h264_decoder"
2146 h264_vda_old_hwaccel_deps="vda"
2147 h264_vda_old_hwaccel_select="h264_decoder"
2148 h264_vdpau_hwaccel_deps="vdpau"
2149 h264_vdpau_hwaccel_select="h264_decoder"
2150 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2151 hevc_d3d11va_hwaccel_select="hevc_decoder"
2152 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2153 hevc_dxva2_hwaccel_select="hevc_decoder"
2154 hevc_qsv_hwaccel_deps="libmfx"
2155 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2156 hevc_vdpau_hwaccep_select="hevc_decoder"
2157 mpeg1_vdpau_hwaccel_deps="vdpau"
2158 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2159 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2160 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2161 mpeg2_dxva2_hwaccel_deps="dxva2"
2162 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2163 mpeg2_qsv_hwaccel_deps="libmfx"
2164 mpeg2_vaapi_hwaccel_deps="vaapi"
2165 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2166 mpeg2_vdpau_hwaccel_deps="vdpau"
2167 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2168 mpeg4_vaapi_hwaccel_deps="vaapi"
2169 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2170 mpeg4_vdpau_hwaccel_deps="vdpau"
2171 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2172 vc1_d3d11va_hwaccel_deps="d3d11va"
2173 vc1_d3d11va_hwaccel_select="vc1_decoder"
2174 vc1_dxva2_hwaccel_deps="dxva2"
2175 vc1_dxva2_hwaccel_select="vc1_decoder"
2176 vc1_vaapi_hwaccel_deps="vaapi"
2177 vc1_vaapi_hwaccel_select="vc1_decoder"
2178 vc1_vdpau_hwaccel_deps="vdpau"
2179 vc1_vdpau_hwaccel_select="vc1_decoder"
2180 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2181 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2182 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2183 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2184
2185 # parsers
2186 h264_parser_select="h264_decoder"
2187 hevc_parser_select="golomb"
2188 mpegvideo_parser_select="mpegvideo"
2189 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2190 vc1_parser_select="mpegvideo startcode vc1_decoder"
2191
2192 # bitstream_filters
2193 mjpeg2jpeg_bsf_select="jpegtables"
2194
2195 # external libraries
2196 libdcadec_decoder_deps="libdcadec"
2197 libfaac_encoder_deps="libfaac"
2198 libfaac_encoder_select="audio_frame_queue"
2199 libfdk_aac_decoder_deps="libfdk_aac"
2200 libfdk_aac_encoder_deps="libfdk_aac"
2201 libfdk_aac_encoder_select="audio_frame_queue"
2202 libgsm_decoder_deps="libgsm"
2203 libgsm_encoder_deps="libgsm"
2204 libgsm_ms_decoder_deps="libgsm"
2205 libgsm_ms_encoder_deps="libgsm"
2206 libilbc_decoder_deps="libilbc"
2207 libilbc_encoder_deps="libilbc"
2208 libkvazaar_encoder_deps="libkvazaar"
2209 libmp3lame_encoder_deps="libmp3lame"
2210 libmp3lame_encoder_select="audio_frame_queue"
2211 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2212 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2213 libopencore_amrnb_encoder_select="audio_frame_queue"
2214 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2215 libopenh264_encoder_deps="libopenh264"
2216 libopenjpeg_decoder_deps="libopenjpeg"
2217 libopenjpeg_encoder_deps="libopenjpeg"
2218 libopus_decoder_deps="libopus"
2219 libopus_encoder_deps="libopus"
2220 libopus_encoder_select="audio_frame_queue"
2221 libschroedinger_decoder_deps="libschroedinger"
2222 libschroedinger_encoder_deps="libschroedinger"
2223 libspeex_decoder_deps="libspeex"
2224 libspeex_encoder_deps="libspeex"
2225 libspeex_encoder_select="audio_frame_queue"
2226 libtheora_encoder_deps="libtheora"
2227 libtwolame_encoder_deps="libtwolame"
2228 libvo_aacenc_encoder_deps="libvo_aacenc"
2229 libvo_aacenc_encoder_select="audio_frame_queue"
2230 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2231 libvorbis_encoder_deps="libvorbis"
2232 libvorbis_encoder_select="audio_frame_queue"
2233 libvpx_vp8_decoder_deps="libvpx"
2234 libvpx_vp8_encoder_deps="libvpx"
2235 libvpx_vp9_decoder_deps="libvpx"
2236 libvpx_vp9_encoder_deps="libvpx"
2237 libwavpack_encoder_deps="libwavpack"
2238 libwebp_encoder_deps="libwebp"
2239 libx262_encoder_deps="libx262"
2240 libx264_encoder_deps="libx264"
2241 libx265_encoder_deps="libx265"
2242 libxavs_encoder_deps="libxavs"
2243 libxvid_encoder_deps="libxvid"
2244
2245 # demuxers / muxers
2246 ac3_demuxer_select="ac3_parser"
2247 asf_demuxer_select="riffdec"
2248 asf_muxer_select="riffenc"
2249 asf_stream_muxer_select="asf_muxer"
2250 avi_demuxer_select="riffdec"
2251 avi_muxer_select="riffenc"
2252 avisynth_demuxer_deps="avisynth"
2253 avisynth_demuxer_select="riffdec"
2254 caf_demuxer_select="riffdec"
2255 dash_muxer_select="mp4_muxer"
2256 dirac_demuxer_select="dirac_parser"
2257 dv_demuxer_select="dvprofile"
2258 dv_muxer_select="dvprofile"
2259 dxa_demuxer_select="riffdec"
2260 eac3_demuxer_select="ac3_parser"
2261 f4v_muxer_select="mov_muxer"
2262 flac_demuxer_select="flac_parser"
2263 hds_muxer_select="flv_muxer"
2264 hls_muxer_select="mpegts_muxer"
2265 ipod_muxer_select="mov_muxer"
2266 ismv_muxer_select="mov_muxer"
2267 matroska_audio_muxer_select="matroska_muxer"
2268 matroska_demuxer_select="riffdec"
2269 matroska_demuxer_suggest="bzlib lzo zlib"
2270 matroska_muxer_select="riffenc"
2271 mmf_muxer_select="riffenc"
2272 mov_demuxer_select="riffdec"
2273 mov_demuxer_suggest="zlib"
2274 mov_muxer_select="riffenc rtpenc_chain"
2275 mp3_demuxer_select="mpegaudio_parser"
2276 mp4_muxer_select="mov_muxer"
2277 mpegts_muxer_select="adts_muxer latm_muxer"
2278 mpegtsraw_demuxer_select="mpegts_demuxer"
2279 mxf_d10_muxer_select="mxf_muxer"
2280 nut_muxer_select="riffenc"
2281 nuv_demuxer_select="riffdec"
2282 oga_muxer_select="ogg_muxer"
2283 ogg_demuxer_select="dirac_parse"
2284 opus_muxer_select="ogg_muxer"
2285 psp_muxer_select="mov_muxer"
2286 rtp_demuxer_select="sdp_demuxer"
2287 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2288 rtsp_demuxer_select="http_protocol rtpdec"
2289 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2290 sap_demuxer_select="sdp_demuxer"
2291 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2292 sdp_demuxer_select="rtpdec"
2293 smoothstreaming_muxer_select="ismv_muxer"
2294 spdif_muxer_select="aac_parser"
2295 spx_muxer_select="ogg_muxer"
2296 swf_demuxer_suggest="zlib"
2297 tak_demuxer_select="tak_parser"
2298 tg2_muxer_select="mov_muxer"
2299 tgp_muxer_select="mov_muxer"
2300 w64_demuxer_select="wav_demuxer"
2301 wav_demuxer_select="riffdec"
2302 wav_muxer_select="riffenc"
2303 webm_muxer_select="riffenc"
2304 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2305 wtv_demuxer_select="riffdec"
2306 xmv_demuxer_select="riffdec"
2307 xwma_demuxer_select="riffdec"
2308
2309 # indevs / outdevs
2310 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2311 alsa_outdev_deps="alsa_asoundlib_h"
2312 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2313 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2314 dv1394_indev_deps="dv1394"
2315 dv1394_indev_select="dv_demuxer"
2316 fbdev_indev_deps="linux_fb_h"
2317 jack_indev_deps="jack_jack_h pthreads"
2318 libcdio_indev_deps="libcdio"
2319 libdc1394_indev_deps="libdc1394"
2320 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2321 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2322 pulse_indev_deps="libpulse"
2323 sndio_indev_deps="sndio_h"
2324 sndio_outdev_deps="sndio_h"
2325 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2326 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2327 vfwcap_indev_extralibs="-lavicap32"
2328 x11grab_indev_deps="x11grab"
2329 x11grab_xcb_indev_deps="libxcb"
2330
2331 # protocols
2332 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2333 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2334 ffrtmpcrypt_protocol_select="tcp_protocol"
2335 ffrtmphttp_protocol_deps="!librtmp_protocol"
2336 ffrtmphttp_protocol_select="http_protocol"
2337 gopher_protocol_select="network"
2338 http_protocol_select="tcp_protocol"
2339 httpproxy_protocol_select="tcp_protocol"
2340 https_protocol_select="tls_protocol"
2341 icecast_protocol_select="http_protocol"
2342 librtmp_protocol_deps="librtmp"
2343 librtmpe_protocol_deps="librtmp"
2344 librtmps_protocol_deps="librtmp"
2345 librtmpt_protocol_deps="librtmp"
2346 librtmpte_protocol_deps="librtmp"
2347 mmsh_protocol_select="http_protocol"
2348 mmst_protocol_select="network"
2349 rtmp_protocol_deps="!librtmp_protocol"
2350 rtmp_protocol_select="tcp_protocol"
2351 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2352 rtmps_protocol_deps="!librtmp_protocol"
2353 rtmps_protocol_select="tls_protocol"
2354 rtmpt_protocol_select="ffrtmphttp_protocol"
2355 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2356 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2357 rtp_protocol_select="udp_protocol"
2358 sctp_protocol_deps="struct_sctp_event_subscribe"
2359 sctp_protocol_select="network"
2360 srtp_protocol_select="rtp_protocol"
2361 tcp_protocol_select="network"
2362 tls_gnutls_protocol_deps="gnutls"
2363 tls_gnutls_protocol_select="tcp_protocol"
2364 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2365 tls_openssl_protocol_select="tcp_protocol"
2366 tls_protocol_select_any="tls_gnutls_protocol tls_openssl_protocol"
2367 udp_protocol_select="network"
2368 unix_protocol_deps="sys_un_h"
2369 unix_protocol_select="network"
2370
2371 # filters
2372 blackframe_filter_deps="gpl"
2373 boxblur_filter_deps="gpl"
2374 bs2b_filter_deps="libbs2b"
2375 cropdetect_filter_deps="gpl"
2376 delogo_filter_deps="gpl"
2377 drawtext_filter_deps="libfreetype"
2378 frei0r_filter_deps="frei0r dlopen"
2379 frei0r_filter_extralibs='$ldl'
2380 frei0r_src_filter_deps="frei0r dlopen"
2381 frei0r_src_filter_extralibs='$ldl'
2382 hqdn3d_filter_deps="gpl"
2383 interlace_filter_deps="gpl"
2384 ocv_filter_deps="libopencv"
2385 resample_filter_deps="avresample"
2386 scale_filter_deps="swscale"
2387
2388 # examples
2389 avcodec_example_deps="avcodec avutil"
2390 filter_audio_example_deps="avfilter avutil"
2391 metadata_example_deps="avformat avutil"
2392 output_example_deps="avcodec avformat avutil swscale"
2393 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2394 transcode_aac_example_deps="avcodec avformat avresample"
2395
2396 # libraries, in linking order
2397 avcodec_deps="avutil"
2398 avdevice_deps="avformat avcodec avutil"
2399 avfilter_deps="avutil"
2400 avformat_deps="avcodec avutil"
2401 avresample_deps="avutil"
2402 swscale_deps="avutil"
2403
2404 # programs
2405 avconv_deps="avcodec avfilter avformat avresample swscale"
2406 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2407                fps_filter null_filter resample_filter scale_filter
2408                setpts_filter trim_filter"
2409 avplay_deps="avcodec avfilter avformat avresample sdl"
2410 avplay_libs='$sdl_libs'
2411 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2412 avprobe_deps="avcodec avformat"
2413
2414 # documentation
2415 pod2man_deps="doc"
2416 texi2html_deps="doc"
2417
2418 # default parameters
2419
2420 logfile="config.log"
2421
2422 # installation paths
2423 prefix_default="/usr/local"
2424 bindir_default='${prefix}/bin'
2425 datadir_default='${prefix}/share/avconv'
2426 docdir_default='${prefix}/share/doc/libav'
2427 incdir_default='${prefix}/include'
2428 libdir_default='${prefix}/lib'
2429 mandir_default='${prefix}/share/man'
2430 shlibdir_default="$libdir_default"
2431
2432 # toolchain
2433 ar_default="ar"
2434 cc_default="gcc"
2435 host_cc_default="gcc"
2436 cp_f="cp -f"
2437 ln_s="ln -s -f"
2438 nm_default="nm -g"
2439 objformat="elf"
2440 pkg_config_default=pkg-config
2441 ranlib="ranlib"
2442 strip="strip"
2443 yasmexe="yasm"
2444
2445 # machine
2446 arch_default=$(uname -m)
2447 cpu="generic"
2448 intrinsics="none"
2449
2450 # OS
2451 target_os_default=$(tolower $(uname -s))
2452 host_os=$target_os_default
2453
2454 # configurable options
2455 enable asm
2456 enable debug
2457 enable doc
2458 enable faan faandct faanidct
2459 enable optimizations
2460 enable safe_bitstream_reader
2461 enable static
2462 enable swscale_alpha
2463 enable valgrind_backtrace
2464
2465 # By default, enable only those hwaccels that have no external dependencies.
2466 enable d3d11va dxva2 vda vdpau
2467
2468 # build settings
2469 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2470 LIBPREF="lib"
2471 LIBSUF=".a"
2472 FULLNAME='$(NAME)$(BUILDSUF)'
2473 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2474 SLIBPREF="lib"
2475 SLIBSUF=".so"
2476 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2477 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2478 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2479 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2480 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2481 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2482
2483 asflags_filter=echo
2484 cflags_filter=echo
2485 ldflags_filter=echo
2486
2487 AS_C='-c'
2488 AS_O='-o $@'
2489 CC_C='-c'
2490 CC_E='-E -o $@'
2491 CC_O='-o $@'
2492 OBJCC_C='-c'
2493 OBJCC_E='-E -o $@'
2494 OBJCC_O='-o $@'
2495 LD_O='-o $@'
2496 LD_LIB='-l%'
2497 LD_PATH='-L'
2498 HOSTCC_C='-c'
2499 HOSTCC_E='-E -o $@'
2500 HOSTCC_O='-o $@'
2501 HOSTLD_O='-o $@'
2502
2503 host_libs='-lm'
2504 host_cflags_filter=echo
2505 host_ldflags_filter=echo
2506
2507 target_path='$(CURDIR)'
2508
2509 # since the object filename is not given with the -MM flag, the compiler
2510 # is only able to print the basename, and we must add the path ourselves
2511 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2512 DEPFLAGS='-MM'
2513
2514 # find source path
2515 if test -f configure; then
2516     source_path=.
2517 else
2518     source_path=$(cd $(dirname "$0"); pwd)
2519     echo "$source_path" | grep -q '[[:blank:]]' &&
2520         die "Out of tree builds are impossible with whitespace in source path."
2521     test -e "$source_path/config.h" &&
2522         die "Out of tree builds are impossible with config.h in source dir."
2523 fi
2524
2525 for v in "$@"; do
2526     r=${v#*=}
2527     l=${v%"$r"}
2528     r=$(sh_quote "$r")
2529     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2530 done
2531
2532 find_things(){
2533     thing=$1
2534     pattern=$2
2535     file=$source_path/$3
2536     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2537 }
2538
2539 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2540 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2541 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2542 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2543 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2544 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2545 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2546 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2547 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2548 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2549 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2550
2551 ALL_COMPONENTS="
2552     $BSF_LIST
2553     $DECODER_LIST
2554     $DEMUXER_LIST
2555     $ENCODER_LIST
2556     $FILTER_LIST
2557     $HWACCEL_LIST
2558     $INDEV_LIST
2559     $MUXER_LIST
2560     $OUTDEV_LIST
2561     $PARSER_LIST
2562     $PROTOCOL_LIST
2563 "
2564
2565 enable $ARCH_EXT_LIST
2566
2567 die_unknown(){
2568     echo "Unknown option \"$1\"."
2569     echo "See $0 --help for available options."
2570     exit 1
2571 }
2572
2573 print_3_columns() {
2574     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2575 }
2576
2577 show_list() {
2578     suffix=_$1
2579     shift
2580     echo $* | sed s/$suffix//g | print_3_columns
2581     exit 0
2582 }
2583
2584 rand_list(){
2585     IFS=', '
2586     set -- $*
2587     unset IFS
2588     for thing; do
2589         comp=${thing%:*}
2590         prob=${thing#$comp}
2591         prob=${prob#:}
2592         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2593         echo "prob ${prob:-0.5}"
2594         printf '%s\n' $comp
2595     done
2596 }
2597
2598 do_random(){
2599     action=$1
2600     shift
2601     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2602     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2603 }
2604
2605 for opt do
2606     optval="${opt#*=}"
2607     case "$opt" in
2608         --extra-ldflags=*)
2609             add_ldflags $optval
2610         ;;
2611         --extra-ldexeflags=*)
2612             add_ldexeflags $optval
2613         ;;
2614         --extra-libs=*)
2615             add_extralibs $optval
2616         ;;
2617         --disable-devices)
2618             disable $INDEV_LIST $OUTDEV_LIST
2619         ;;
2620         --enable-debug=*)
2621             debuglevel="$optval"
2622         ;;
2623         --disable-programs)
2624             disable $PROGRAM_LIST
2625         ;;
2626         --disable-everything)
2627             map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2628             enable_deep_force $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2629         ;;
2630         --disable-all)
2631             map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2632             disable $LIBRARY_LIST $PROGRAM_LIST doc
2633         ;;
2634         --enable-random|--disable-random)
2635             action=${opt%%-random}
2636             do_random ${action#--} $COMPONENT_LIST
2637         ;;
2638         --enable-random=*|--disable-random=*)
2639             action=${opt%%-random=*}
2640             do_random ${action#--} $optval
2641         ;;
2642         --enable-*=*|--disable-*=*)
2643             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2644             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2645             eval list=\$$(toupper $thing)_LIST
2646             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2647             test $action = enable && action="request"
2648             $action $(filter "$name" $list)
2649         ;;
2650         --enable-avserver|--disable-avserver*)
2651             warn "avserver has been removed, the ${opt} option is only"\
2652                  "provided for compatibility and will be removed in the future"
2653         ;;
2654         --enable-?*|--disable-?*)
2655             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2656             test $action = enable && action="request"
2657             if is_in $option $COMPONENT_LIST; then
2658                 eval $action \$$(toupper ${option%s})_LIST
2659             elif is_in $option $CMDLINE_SELECT; then
2660                 $action $option
2661             else
2662                 die_unknown $opt
2663             fi
2664         ;;
2665         --list-*)
2666             NAME="${opt#--list-}"
2667             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2668             NAME=${NAME%s}
2669             eval show_list $NAME \$$(toupper $NAME)_LIST
2670         ;;
2671         --help|-h) show_help
2672         ;;
2673         *)
2674             optname="${opt%%=*}"
2675             optname="${optname#--}"
2676             optname=$(echo "$optname" | sed 's/-/_/g')
2677             if is_in $optname $CMDLINE_SET; then
2678                 eval $optname='$optval'
2679             elif is_in $optname $CMDLINE_APPEND; then
2680                 append $optname "$optval"
2681             else
2682                 die_unknown $opt
2683             fi
2684         ;;
2685     esac
2686 done
2687
2688 for e in $env; do
2689     eval "export $e"
2690 done
2691
2692 disabled logging && logfile=/dev/null
2693
2694 # Enable the default components if not disabled explicitly
2695
2696 enable_weak $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2697
2698 # Disable all the library-specific components if the library itself
2699 # is disabled, see AVCODEC_LIST and following _LIST variables.
2700
2701 disable_components(){
2702     disabled ${1} && disable_weak $(
2703         eval components="\$$(toupper ${1})_COMPONENTS"
2704         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2705     )
2706 }
2707
2708 map 'disable_components $v' $LIBRARY_LIST
2709
2710 # Mark components that had not been enabled/disabled explicitly
2711 # as enabled
2712
2713 for n in $COMPONENT_LIST; do
2714     v=$(toupper ${n%s})_LIST
2715     eval enable_weak \$$v
2716     eval ${n}_if_any="\$$v"
2717 done
2718
2719 # Make so that disabled libraries are enabled if a component
2720 # of them is requested
2721
2722 for n in $LIBRARY_LIST; do
2723     v=$(toupper ${n})_COMPONENTS
2724     eval ${n}_if_any="\$$v"
2725 done
2726
2727 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2728 set >> $logfile
2729
2730 case "$toolchain" in
2731     *-asan)
2732         cc_default="${toolchain%-asan}"
2733         add_cflags  -fsanitize=address
2734         add_ldflags -fsanitize=address
2735     ;;
2736     *-tsan)
2737         cc_default="${toolchain%-tsan}"
2738         add_cflags  -fsanitize=thread -pie
2739         add_ldflags -fsanitize=thread -pie
2740         case "$toolchain" in
2741             gcc-tsan)
2742                 add_cflags  -fPIC
2743                 add_ldflags -fPIC
2744                 ;;
2745         esac
2746     ;;
2747     *-usan)
2748         cc_default="${toolchain%-usan}"
2749         add_cflags  -fsanitize=undefined
2750         add_ldflags -fsanitize=undefined
2751         case "$toolchain" in
2752             clang-usan)
2753                 add_cflags -O1
2754                 ;;
2755         esac
2756     ;;
2757     valgrind-*)
2758         target_exec_default="valgrind"
2759         case "$toolchain" in
2760             valgrind-massif)
2761                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2762                 ;;
2763             valgrind-memcheck)
2764                 target_exec_args="--track-origins=yes --leak-check=full"
2765                 ;;
2766         esac
2767     ;;
2768     msvc)
2769         # Check whether the current MSVC version needs the C99 converter.
2770         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2771         # support enough of C99 to build libav. Default to the new
2772         # behaviour if the regexp was unable to match anything, since this
2773         # successfully parses the version number of existing supported
2774         # versions that require the converter (MSVC 2010 and 2012).
2775         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2776         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2777             cc_default="cl"
2778         else
2779             cc_default="c99wrap cl"
2780         fi
2781         ld_default="$source_path/compat/windows/mslink"
2782         nm_default="dumpbin -symbols"
2783         ar_default="lib"
2784         case "$arch" in
2785         arm*)
2786             as_default="armasm"
2787             ;;
2788         esac
2789         target_os_default="win32"
2790         # Use a relative path for TMPDIR. This makes sure all the
2791         # ffconf temp files are written with a relative path, avoiding
2792         # issues with msys/win32 path conversion for MSVC parameters
2793         # such as -Fo<file> or -out:<file>.
2794         TMPDIR=.
2795     ;;
2796     icl)
2797         cc_default="icl"
2798         ld_default="xilink"
2799         nm_default="dumpbin -symbols"
2800         ar_default="xilib"
2801         target_os_default="win32"
2802         TMPDIR=.
2803     ;;
2804     gcov)
2805         add_cflags  -fprofile-arcs -ftest-coverage
2806         add_ldflags -fprofile-arcs -ftest-coverage
2807     ;;
2808     hardened)
2809         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2810         add_cflags   -fno-strict-overflow -fstack-protector-all
2811         add_ldflags  -Wl,-z,relro -Wl,-z,now
2812     ;;
2813     ?*)
2814         die "Unknown toolchain $toolchain"
2815     ;;
2816 esac
2817
2818 test -n "$cross_prefix" && enable cross_compile
2819
2820 if enabled cross_compile; then
2821     test -n "$arch" && test -n "$target_os" ||
2822         die "Must specify target arch and OS when cross-compiling"
2823 fi
2824
2825 ar_default="${cross_prefix}${ar_default}"
2826 cc_default="${cross_prefix}${cc_default}"
2827 occ_default="${cross_prefix}${occ_default}"
2828 nm_default="${cross_prefix}${nm_default}"
2829 pkg_config_default="${cross_prefix}${pkg_config_default}"
2830 ranlib="${cross_prefix}${ranlib}"
2831 strip="${cross_prefix}${strip}"
2832
2833 sysinclude_default="${sysroot}/usr/include"
2834
2835 set_default arch cc pkg_config sysinclude target_exec target_os
2836 enabled cross_compile || host_cc_default=$cc
2837 set_default host_cc
2838
2839 if ! $pkg_config --version >/dev/null 2>&1; then
2840     warn "$pkg_config not found, library detection may fail."
2841     pkg_config=false
2842 fi
2843
2844 exesuf() {
2845     case $1 in
2846         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2847     esac
2848 }
2849
2850 EXESUF=$(exesuf $target_os)
2851 HOSTEXESUF=$(exesuf $host_os)
2852
2853 # set temporary file name
2854 : ${TMPDIR:=$TEMPDIR}
2855 : ${TMPDIR:=$TMP}
2856 : ${TMPDIR:=/tmp}
2857
2858 if ! check_cmd mktemp -u XXXXXX; then
2859     # simple replacement for missing mktemp
2860     # NOT SAFE FOR GENERAL USE
2861     mktemp(){
2862         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2863     }
2864 fi
2865
2866 tmpfile(){
2867     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2868         (set -C; exec > $tmp) 2>/dev/null ||
2869         die "Unable to create temporary file in $TMPDIR."
2870     append TMPFILES $tmp
2871     eval $1=$tmp
2872 }
2873
2874 trap 'rm -f -- $TMPFILES' EXIT
2875
2876 tmpfile TMPASM .asm
2877 tmpfile TMPC   .c
2878 tmpfile TMPE   $EXESUF
2879 tmpfile TMPH   .h
2880 tmpfile TMPO   .o
2881 tmpfile TMPS   .S
2882 tmpfile TMPSH  .sh
2883 tmpfile TMPV   .ver
2884
2885 unset -f mktemp
2886
2887 chmod +x $TMPE
2888
2889 # make sure we can execute files in $TMPDIR
2890 cat > $TMPSH 2>> $logfile <<EOF
2891 #! /bin/sh
2892 EOF
2893 chmod +x $TMPSH >> $logfile 2>&1
2894 if ! $TMPSH >> $logfile 2>&1; then
2895     cat <<EOF
2896 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2897 variable to another directory and make sure that it is not mounted noexec.
2898 EOF
2899     die "Sanity test failed."
2900 fi
2901
2902 armasm_flags(){
2903     for flag; do
2904         case $flag in
2905             # Filter out MSVC cl.exe options from cflags that shouldn't
2906             # be passed to gas-preprocessor
2907             -M[TD]*)                                            ;;
2908             *)                  echo $flag                      ;;
2909         esac
2910    done
2911 }
2912
2913 ccc_flags(){
2914     for flag; do
2915         case $flag in
2916             -std=c99)           echo -c99                       ;;
2917             -mcpu=*)            echo -arch ${flag#*=}           ;;
2918             -mieee)             echo -ieee                      ;;
2919             -O*|-fast)          echo $flag                      ;;
2920             -fno-math-errno)    echo -assume nomath_errno       ;;
2921             -g)                 echo -g3                        ;;
2922             -Wall)              echo -msg_enable level2         ;;
2923             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2924             -Wl,*)              echo $flag                      ;;
2925             -f*|-W*)                                            ;;
2926             *)                  echo $flag                      ;;
2927         esac
2928    done
2929 }
2930
2931 cparser_flags(){
2932     for flag; do
2933         case $flag in
2934             -Wno-switch)             echo -Wno-switch-enum ;;
2935             -Wno-format-zero-length) ;;
2936             -Wdisabled-optimization) ;;
2937             -Wno-pointer-sign)       echo -Wno-other ;;
2938             *)                       echo $flag ;;
2939         esac
2940     done
2941 }
2942
2943 msvc_common_flags(){
2944     for flag; do
2945         case $flag in
2946             # In addition to specifying certain flags under the compiler
2947             # specific filters, they must be specified here as well or else the
2948             # generic catch all at the bottom will print the original flag.
2949             -Wall)                ;;
2950             -std=c99)             ;;
2951             # Common flags
2952             -fomit-frame-pointer) ;;
2953             -g)                   echo -Z7 ;;
2954             -fno-math-errno)      ;;
2955             -fno-common)          ;;
2956             -fno-signed-zeros)    ;;
2957             -fPIC)                ;;
2958             -mthumb)              ;;
2959             -march=*)             ;;
2960             -lz)                  echo zlib.lib ;;
2961             -lavifil32)           echo vfw32.lib ;;
2962             -lavicap32)           echo vfw32.lib user32.lib ;;
2963             -lx264)               echo libx264.lib ;;
2964             -l*)                  echo ${flag#-l}.lib ;;
2965             -L*)                  echo -libpath:${flag#-L} ;;
2966             *)                    echo $flag ;;
2967         esac
2968     done
2969 }
2970
2971 msvc_flags(){
2972     msvc_common_flags "$@"
2973     for flag; do
2974         case $flag in
2975             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2976                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2977                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2978                                        -wd4273 -wd4554 -wd4701 ;;
2979         esac
2980     done
2981 }
2982
2983 icl_flags(){
2984     msvc_common_flags "$@"
2985     for flag; do
2986         case $flag in
2987             # Despite what Intel's documentation says -Wall, which is supported
2988             # on Windows, does enable remarks so disable them here.
2989             -Wall)                echo $flag -Qdiag-disable:remark ;;
2990             -std=c99)             echo -Qstd=c99 ;;
2991         esac
2992     done
2993 }
2994
2995 pgi_flags(){
2996     for flag; do
2997         case $flag in
2998             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2999             -fomit-frame-pointer) echo -Mnoframe ;;
3000             -g)                   echo -gopt ;;
3001             *)                    echo $flag ;;
3002         esac
3003     done
3004 }
3005
3006 suncc_flags(){
3007     for flag; do
3008         case $flag in
3009             -march=*|-mcpu=*)
3010                 case "${flag#*=}" in
3011                     native)                   echo -xtarget=native       ;;
3012                     v9|niagara)               echo -xarch=sparc          ;;
3013                     ultrasparc)               echo -xarch=sparcvis       ;;
3014                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3015                     i586|pentium)             echo -xchip=pentium        ;;
3016                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3017                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3018                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3019                     pentium4*)          echo -xtarget=pentium4           ;;
3020                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3021                     *-sse3)             echo -xarch=sse3                 ;;
3022                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3023                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3024                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3025                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3026                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3027                     k8|opteron|athlon64|athlon-fx)
3028                                                echo -xarch=sse2a         ;;
3029                     athlon*)                   echo -xarch=pentium_proa  ;;
3030                 esac
3031                 ;;
3032             -std=c99)             echo -xc99              ;;
3033             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3034             -fPIC)                echo -KPIC -xcode=pic32 ;;
3035             -W*,*)                echo $flag              ;;
3036             -f*-*|-W*|-mimpure-text)                      ;;
3037             -shared)              echo -G                 ;;
3038             *)                    echo $flag              ;;
3039         esac
3040     done
3041 }
3042
3043 tms470_flags(){
3044     for flag; do
3045         case $flag in
3046             -march=*|-mcpu=*)
3047                 case "${flag#*=}" in
3048                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3049                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3050                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3051                     armv6*|arm11*)          echo -mv=6   ;;
3052                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3053                                             echo -mv=5e  ;;
3054                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3055                 esac
3056                 ;;
3057             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3058             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3059             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3060             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3061             -msoft-float)   echo --float_support=vfplib       ;;
3062             -O[0-3]|-mf=*)  echo $flag                        ;;
3063             -g)             echo -g -mn                       ;;
3064             -pds=*)         echo $flag                        ;;
3065             -D*|-I*)        echo $flag                        ;;
3066             --gcc|--abi=*)  echo $flag                        ;;
3067             -me)            echo $flag                        ;;
3068         esac
3069     done
3070 }
3071
3072 probe_cc(){
3073     pfx=$1
3074     _cc=$2
3075
3076     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3077     unset _ld_o _ldflags _ld_lib _ld_path
3078     unset _depflags _DEPCMD _DEPFLAGS
3079     _flags_filter=echo
3080
3081     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3082         _type=llvm_gcc
3083         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3084         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3085         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3086         _cflags_speed='-O3'
3087         _cflags_size='-Os'
3088     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3089         _type=gcc
3090         gcc_version=$($_cc --version | head -n1)
3091         gcc_basever=$($_cc -dumpversion)
3092         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3093         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3094         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3095         if ! $_cc -dumpversion | grep -q '^2\.'; then
3096             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3097         fi
3098         _cflags_speed='-O3'
3099         _cflags_size='-Os'
3100     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3101         _type=icc
3102         _ident=$($_cc --version | head -n1)
3103         _depflags='-MMD'
3104         _cflags_speed='-O3'
3105         _cflags_size='-Os'
3106         _cflags_noopt='-O1'
3107     elif $_cc -v 2>&1 | grep -q xlc; then
3108         _type=xlc
3109         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3110         _cflags_speed='-O5'
3111         _cflags_size='-O5 -qcompact'
3112     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3113         _type=ccc
3114         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3115         _DEPFLAGS='-M'
3116         _cflags_speed='-fast'
3117         _cflags_size='-O1'
3118         _flags_filter=ccc_flags
3119     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3120         test -d "$sysroot" || die "No valid sysroot specified."
3121         _type=armcc
3122         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3123         armcc_conf="$PWD/armcc.conf"
3124         $_cc --arm_linux_configure                 \
3125              --arm_linux_config_file="$armcc_conf" \
3126              --configure_sysroot="$sysroot"        \
3127              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3128              die "Error creating armcc configuration file."
3129         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3130         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3131         as_default="${cross_prefix}gcc"
3132         _depflags='-MMD'
3133         _cflags_speed='-O3'
3134         _cflags_size='-Os'
3135     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3136         _type=tms470
3137         _ident=$($_cc -version | head -n1 | tr -s ' ')
3138         _flags='--gcc --abi=eabi -me'
3139         _cc_e='-ppl -fe=$@'
3140         _cc_o='-fe=$@'
3141         _depflags='-ppa -ppd=$(@:.o=.d)'
3142         _cflags_speed='-O3 -mf=5'
3143         _cflags_size='-O3 -mf=2'
3144         _flags_filter=tms470_flags
3145     elif $_cc -v 2>&1 | grep -q clang; then
3146         _type=clang
3147         _ident=$($_cc --version 2>/dev/null | head -n1)
3148         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3149         _cflags_speed='-O3'
3150         _cflags_size='-Os'
3151     elif $_cc -V 2>&1 | grep -q Sun; then
3152         _type=suncc
3153         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3154         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3155         _DEPFLAGS='-xM1 -xc99'
3156         _ldflags='-std=c99'
3157         _cflags_speed='-O5'
3158         _cflags_size='-O5 -xspace'
3159         _flags_filter=suncc_flags
3160     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3161         _type=pathscale
3162         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3163         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3164         _cflags_speed='-O2'
3165         _cflags_size='-Os'
3166         _flags_filter='filter_out -Wdisabled-optimization'
3167     elif $_cc -v 2>&1 | grep -q Open64; then
3168         _type=open64
3169         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3170         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3171         _cflags_speed='-O2'
3172         _cflags_size='-Os'
3173         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3174     elif $_cc -V 2>&1 | grep -q Portland; then
3175         _type=pgi
3176         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3177         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3178         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3179         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3180         _cflags_noopt="-O1"
3181         _flags_filter=pgi_flags
3182     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3183         _type=armasm
3184         _ident=$($_cc | head -n1)
3185         # 4509: "This form of conditional instruction is deprecated"
3186         _flags="-nologo -ignore 4509"
3187         _flags_filter=armasm_flags
3188     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3189         _type=msvc
3190         _ident=$($_cc 2>&1 | head -n1)
3191         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3192         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3193         _cflags_speed="-O2"
3194         _cflags_size="-O1"
3195         if $_cc -nologo- 2>&1 | grep -q Linker; then
3196             _ld_o='-out:$@'
3197         else
3198             _ld_o='-Fe$@'
3199         fi
3200         _cc_o='-Fo$@'
3201         _cc_e='-P -Fi$@'
3202         _flags_filter=msvc_flags
3203         _ld_lib='lib%.a'
3204         _ld_path='-libpath:'
3205         _flags='-nologo'
3206         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3207     elif $_cc 2>&1 | grep -q Intel; then
3208         _type=icl
3209         _ident=$($_cc 2>&1 | head -n1)
3210         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3211         # Not only is O3 broken on 13.x+ but it is slower on all previous
3212         # versions (tested) as well.
3213         _cflags_speed="-O2"
3214         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3215         if $_cc 2>&1 | grep -q Linker; then
3216             _ld_o='-out:$@'
3217         else
3218             _ld_o='-Fe$@'
3219         fi
3220         _cc_o='-Fo$@'
3221         _cc_e='-P'
3222         _flags_filter=icl_flags
3223         _ld_lib='lib%.a'
3224         _ld_path='-libpath:'
3225         # -Qdiag-error to make icl error when seeing certain unknown arguments
3226         _flags='-nologo -Qdiag-error:4044,10157'
3227         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3228         # with MSVC which enables it by default.
3229         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3230     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3231         _type=cparser
3232         _ident=$($_cc --version | head -n1)
3233         _depflags='-MMD'
3234         _cflags_speed='-O4'
3235         _cflags_size='-O2'
3236         _flags_filter=cparser_flags
3237     fi
3238
3239     eval ${pfx}_type=\$_type
3240     eval ${pfx}_ident=\$_ident
3241 }
3242
3243 set_ccvars(){
3244     eval ${1}_C=\${_cc_c-\${${1}_C}}
3245     eval ${1}_E=\${_cc_e-\${${1}_E}}
3246     eval ${1}_O=\${_cc_o-\${${1}_O}}
3247
3248     if [ -n "$_depflags" ]; then
3249         eval ${1}_DEPFLAGS=\$_depflags
3250     else
3251         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3252         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3253         eval DEP${1}FLAGS=\$_flags
3254     fi
3255 }
3256
3257 probe_cc cc "$cc"
3258 cflags_filter=$_flags_filter
3259 cflags_speed=$_cflags_speed
3260 cflags_size=$_cflags_size
3261 cflags_noopt=$_cflags_noopt
3262 add_cflags $_flags $_cflags
3263 cc_ldflags=$_ldflags
3264 set_ccvars CC
3265
3266 probe_cc hostcc "$host_cc"
3267 host_cflags_filter=$_flags_filter
3268 add_host_cflags  $_flags $_cflags
3269 set_ccvars HOSTCC
3270
3271 test -n "$cc_type" && enable $cc_type ||
3272     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3273
3274 : ${as_default:=$cc}
3275 : ${objcc_default:=$cc}
3276 : ${dep_cc_default:=$cc}
3277 : ${ld_default:=$cc}
3278 : ${host_ld_default:=$host_cc}
3279 set_default ar as objcc dep_cc ld host_ld
3280
3281 probe_cc as "$as"
3282 asflags_filter=$_flags_filter
3283 add_asflags $_flags $_cflags
3284 set_ccvars AS
3285
3286 probe_cc objcc "$objcc"
3287 objcflags_filter=$_flags_filter
3288 add_objcflags $_flags $_cflags
3289 set_ccvars OBJC
3290
3291 probe_cc ld "$ld"
3292 ldflags_filter=$_flags_filter
3293 add_ldflags $_flags $_ldflags
3294 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3295 LD_O=${_ld_o-$LD_O}
3296 LD_LIB=${_ld_lib-$LD_LIB}
3297 LD_PATH=${_ld_path-$LD_PATH}
3298
3299 probe_cc hostld "$host_ld"
3300 host_ldflags_filter=$_flags_filter
3301 add_host_ldflags $_flags $_ldflags
3302 HOSTLD_O=${_ld_o-$HOSTLD_O}
3303
3304 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3305     probe_cc depcc "$dep_cc"
3306     CCDEP=${_DEPCMD:-$DEPCMD}
3307     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3308     DEPCCFLAGS=$_flags
3309 fi
3310
3311 if $ar 2>&1 | grep -q Microsoft; then
3312     arflags="-nologo"
3313     ar_o='-out:$@'
3314 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3315     arflags="rq"
3316     ar_o='$@'
3317 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3318     arflags='-Xany -r -c'
3319     ar_o='$@'
3320 else
3321     arflags="rc"
3322     ar_o='$@'
3323 fi
3324
3325 add_cflags $extra_cflags
3326 add_objcflags $extra_objcflags
3327 add_asflags $extra_cflags
3328
3329 if test -n "$sysroot"; then
3330     case "$cc_type" in
3331         gcc|llvm_gcc|clang)
3332             add_cppflags --sysroot="$sysroot"
3333             add_ldflags --sysroot="$sysroot"
3334         ;;
3335         tms470)
3336             add_cppflags -I"$sysinclude"
3337             add_ldflags  --sysroot="$sysroot"
3338         ;;
3339     esac
3340 fi
3341
3342 if test "$cpu" = host; then
3343     enabled cross_compile &&
3344         die "--cpu=host makes no sense when cross-compiling."
3345
3346     case "$cc_type" in
3347         gcc|llvm_gcc)
3348             check_native(){
3349                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3350                 sed -n "/cc1.*$1=/{
3351                             s/.*$1=\\([^ ]*\\).*/\\1/
3352                             p
3353                             q
3354                         }" $TMPE
3355             }
3356             cpu=$(check_native -march || check_native -mcpu)
3357         ;;
3358     esac
3359
3360     test "${cpu:-host}" = host &&
3361         die "--cpu=host not supported with compiler $cc"
3362 fi
3363
3364 # Deal with common $arch aliases
3365 case "$arch" in
3366     aarch64|arm64)
3367         arch="aarch64"
3368     ;;
3369     arm*)
3370         arch="arm"
3371     ;;
3372     mips*|IP*)
3373         case "$arch" in
3374         *el)
3375             add_cppflags -EL
3376             add_ldflags -EL
3377         ;;
3378         *eb)
3379             add_cppflags -EB
3380             add_ldflags -EB
3381         ;;
3382         esac
3383         arch="mips"
3384     ;;
3385     parisc*|hppa*)
3386         arch="parisc"
3387     ;;
3388     "Power Macintosh"|ppc*|powerpc*)
3389         arch="ppc"
3390     ;;
3391     s390|s390x)
3392         arch="s390"
3393     ;;
3394     sh4|sh)
3395         arch="sh4"
3396     ;;
3397     sun4u|sparc*)
3398         arch="sparc"
3399     ;;
3400     tilegx|tile-gx)
3401         arch="tilegx"
3402     ;;
3403     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3404         arch="x86"
3405     ;;
3406 esac
3407
3408 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3409 enable $arch
3410
3411 # Add processor-specific flags
3412 if enabled aarch64; then
3413
3414     case $cpu in
3415         armv*)
3416             cpuflags="-march=$cpu"
3417         ;;
3418         *)
3419             cpuflags="-mcpu=$cpu"
3420         ;;
3421     esac
3422
3423 elif enabled alpha; then
3424
3425     cpuflags="-mcpu=$cpu"
3426
3427 elif enabled arm; then
3428
3429     check_arm_arch() {
3430         check_cpp_condition stddef.h \
3431             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3432             $cpuflags
3433     }
3434
3435     probe_arm_arch() {
3436         if   check_arm_arch 4;        then echo armv4;
3437         elif check_arm_arch 4T;       then echo armv4t;
3438         elif check_arm_arch 5;        then echo armv5;
3439         elif check_arm_arch 5E;       then echo armv5e;
3440         elif check_arm_arch 5T;       then echo armv5t;
3441         elif check_arm_arch 5TE;      then echo armv5te;
3442         elif check_arm_arch 5TEJ;     then echo armv5te;
3443         elif check_arm_arch 6;        then echo armv6;
3444         elif check_arm_arch 6J;       then echo armv6j;
3445         elif check_arm_arch 6K;       then echo armv6k;
3446         elif check_arm_arch 6Z;       then echo armv6z;
3447         elif check_arm_arch 6ZK;      then echo armv6zk;
3448         elif check_arm_arch 6T2;      then echo armv6t2;
3449         elif check_arm_arch 7;        then echo armv7;
3450         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3451         elif check_arm_arch 7S;       then echo armv7-a;
3452         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3453         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3454         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3455         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3456         fi
3457     }
3458
3459     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3460
3461     case $cpu in
3462         armv*)
3463             cpuflags="-march=$cpu"
3464             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3465         ;;
3466         *)
3467             cpuflags="-mcpu=$cpu"
3468             case $cpu in
3469                 cortex-a*)                               subarch=armv7a  ;;
3470                 cortex-r*)                               subarch=armv7r  ;;
3471                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3472                 arm11*)                                  subarch=armv6   ;;
3473                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3474                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3475                 *)                             subarch=$(probe_arm_arch) ;;
3476             esac
3477         ;;
3478     esac
3479
3480     case "$subarch" in
3481         armv5t*)    enable fast_clz                ;;
3482         armv[6-8]*) enable fast_clz fast_unaligned ;;
3483     esac
3484
3485 elif enabled avr32; then
3486
3487     case $cpu in
3488         ap7[02]0[0-2])
3489             subarch="avr32_ap"
3490             cpuflags="-mpart=$cpu"
3491         ;;
3492         ap)
3493             subarch="avr32_ap"
3494             cpuflags="-march=$cpu"
3495         ;;
3496         uc3[ab]*)
3497             subarch="avr32_uc"
3498             cpuflags="-mcpu=$cpu"
3499         ;;
3500         uc)
3501             subarch="avr32_uc"
3502             cpuflags="-march=$cpu"
3503         ;;
3504     esac
3505
3506 elif enabled bfin; then
3507
3508     cpuflags="-mcpu=$cpu"
3509
3510 elif enabled mips; then
3511
3512     cpuflags="-march=$cpu"
3513
3514 elif enabled ppc; then
3515
3516     disable ldbrx
3517
3518     case $(tolower $cpu) in
3519         601|ppc601|powerpc601)
3520             cpuflags="-mcpu=601"
3521             disable altivec
3522         ;;
3523         603*|ppc603*|powerpc603*)
3524             cpuflags="-mcpu=603"
3525             disable altivec
3526         ;;
3527         604*|ppc604*|powerpc604*)
3528             cpuflags="-mcpu=604"
3529             disable altivec
3530         ;;
3531         g3|75*|ppc75*|powerpc75*)
3532             cpuflags="-mcpu=750"
3533             disable altivec
3534         ;;
3535         g4|745*|ppc745*|powerpc745*)
3536             cpuflags="-mcpu=7450"
3537             disable vsx
3538         ;;
3539         74*|ppc74*|powerpc74*)
3540             cpuflags="-mcpu=7400"
3541             disable vsx
3542         ;;
3543         g5|970|ppc970|powerpc970)
3544             cpuflags="-mcpu=970"
3545             disable vsx
3546         ;;
3547         power[3-6]*)
3548             cpuflags="-mcpu=$cpu"
3549             disable vsx
3550         ;;
3551         power[7-8]*)
3552             cpuflags="-mcpu=$cpu"
3553             enable ldbrx
3554         ;;
3555         cell)
3556             cpuflags="-mcpu=cell"
3557             enable ldbrx
3558             disable vsx
3559         ;;
3560         e500mc)
3561             cpuflags="-mcpu=e500mc"
3562             disable altivec
3563         ;;
3564         e500v2)
3565             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3566             disable altivec
3567             disable dcbzl
3568         ;;
3569         e500)
3570             cpuflags="-mcpu=8540 -mhard-float"
3571             disable altivec
3572             disable dcbzl
3573         ;;
3574     esac
3575
3576 elif enabled sparc; then
3577
3578     case $cpu in
3579         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3580             cpuflags="-mcpu=$cpu"
3581         ;;
3582         ultrasparc*|niagara[234])
3583             cpuflags="-mcpu=$cpu"
3584         ;;
3585     esac
3586
3587 elif enabled x86; then
3588
3589     case $cpu in
3590         i[345]86|pentium)
3591             cpuflags="-march=$cpu"
3592             disable i686
3593             disable mmx
3594         ;;
3595         # targets that do NOT support nopl and conditional mov (cmov)
3596         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3597             cpuflags="-march=$cpu"
3598             disable i686
3599         ;;
3600         # targets that do support nopl and conditional mov (cmov)
3601         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3602             cpuflags="-march=$cpu"
3603             enable i686
3604             enable fast_cmov
3605         ;;
3606         # targets that do support conditional mov but on which it's slow
3607         pentium4|pentium4m|prescott|nocona)
3608             cpuflags="-march=$cpu"
3609             enable i686
3610             disable fast_cmov
3611         ;;
3612     esac
3613
3614 fi
3615
3616 if [ "$cpu" != generic ]; then
3617     add_cflags  $cpuflags
3618     add_asflags $cpuflags
3619     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3620 fi
3621
3622 # compiler sanity check
3623 check_exec <<EOF
3624 int main(void){ return 0; }
3625 EOF
3626 if test "$?" != 0; then
3627     echo "$cc is unable to create an executable file."
3628     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3629         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3630         echo "Only do this if you know what cross compiling means."
3631     fi
3632     die "C compiler test failed."
3633 fi
3634
3635 add_cppflags -D_ISOC99_SOURCE
3636 check_cflags -std=c99
3637 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3638 #include <stdlib.h>
3639 EOF
3640 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3641 #include <stdlib.h>
3642 EOF
3643
3644 add_host_cppflags -D_ISOC99_SOURCE
3645 check_host_cflags -std=c99
3646 check_host_cflags -Wall
3647 check_host_cflags -O3
3648
3649 check_64bit(){
3650     arch32=$1
3651     arch64=$2
3652     expr=$3
3653     check_code cc "" "int test[2*($expr) - 1]" &&
3654         subarch=$arch64 || subarch=$arch32
3655 }
3656
3657 case "$arch" in
3658     aarch64|alpha|ia64)
3659         spic=$shared
3660     ;;
3661     mips)
3662         check_64bit mips mips64 '_MIPS_SIM > 1'
3663         spic=$shared
3664     ;;
3665     parisc)
3666         check_64bit parisc parisc64 'sizeof(void *) > 4'
3667         spic=$shared
3668     ;;
3669     ppc)
3670         check_64bit ppc ppc64 'sizeof(void *) > 4'
3671         spic=$shared
3672     ;;
3673     s390)
3674         check_64bit s390 s390x 'sizeof(void *) > 4'
3675         spic=$shared
3676     ;;
3677     sparc)
3678         check_64bit sparc sparc64 'sizeof(void *) > 4'
3679         spic=$shared
3680     ;;
3681     x86)
3682         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3683         if test "$subarch" = "x86_64"; then
3684             spic=$shared
3685         fi
3686     ;;
3687 esac
3688
3689 enable $subarch
3690 enabled spic && enable_weak pic
3691
3692 # OS specific
3693 case $target_os in
3694     aix)
3695         SHFLAGS=-shared
3696         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3697         enabled shared && add_ldflags -Wl,-brtl
3698         ;;
3699     android)
3700         disable symver
3701         enable section_data_rel_ro
3702         SLIB_INSTALL_NAME='$(SLIBNAME)'
3703         SLIB_INSTALL_LINKS=
3704         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3705         ;;
3706     haiku)
3707         prefix_default="/boot/common"
3708         network_extralibs="-lnetwork"
3709         host_libs=
3710         ;;
3711     sunos)
3712         SHFLAGS='-shared -Wl,-h,$$(@F)'
3713         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3714         network_extralibs="-lsocket -lnsl"
3715         # When using suncc to build, the Solaris linker will mark
3716         # an executable with each instruction set encountered by
3717         # the Solaris assembler.  As our libraries contain their own
3718         # guards for processor-specific code, instead suppress
3719         # generation of the HWCAPS ELF section on Solaris x86 only.
3720         enabled_all suncc x86 &&
3721             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3722             add_ldflags -Wl,-M,mapfile
3723         nm_default='nm -P -g'
3724         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3725         ;;
3726     netbsd)
3727         disable symver
3728         oss_indev_extralibs="-lossaudio"
3729         oss_outdev_extralibs="-lossaudio"
3730         ;;
3731     openbsd|bitrig)
3732         disable symver
3733         SHFLAGS='-shared'
3734         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3735         SLIB_INSTALL_LINKS=
3736         oss_indev_extralibs="-lossaudio"
3737         oss_outdev_extralibs="-lossaudio"
3738         ;;
3739     dragonfly)
3740         disable symver
3741         ;;
3742     freebsd)
3743         ;;
3744     bsd/os)
3745         add_extralibs -lpoll -lgnugetopt
3746         ;;
3747     darwin)
3748         enabled ppc && add_asflags -force_cpusubtype_ALL
3749         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3750         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3751         add_ldflags -Wl,-dynamic,-search_paths_first
3752         SLIBSUF=".dylib"
3753         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3754         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3755         objformat="macho"
3756         enabled x86_64 && objformat="macho64"
3757         enabled_any pic shared ||
3758             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3759         ;;
3760     msys*)
3761         die "Native MSYS builds are discouraged, please use the MINGW environment.";
3762         ;;
3763     mingw32*|mingw64*)
3764         if test $target_os = "mingw32ce"; then
3765             disable network
3766         else
3767             target_os=mingw32
3768         fi
3769         LIBTARGET=i386
3770         if enabled x86_64; then
3771             LIBTARGET="i386:x86-64"
3772         elif enabled arm; then
3773             LIBTARGET=arm-wince
3774         fi
3775         check_ldflags -Wl,--nxcompat
3776         check_ldflags -Wl,--dynamicbase
3777         shlibdir_default="$bindir_default"
3778         SLIBPREF=""
3779         SLIBSUF=".dll"
3780         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3781         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3782         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3783         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3784         SLIB_INSTALL_LINKS=
3785         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3786         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3787         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3788         objformat="win32"
3789         dlltool="${cross_prefix}dlltool"
3790         ranlib=:
3791         enable dos_paths
3792         ;;
3793     win32|win64)
3794         disable symver
3795         if enabled shared; then
3796             # Link to the import library instead of the normal static library
3797             # for shared libs.
3798             LD_LIB='%.lib'
3799             # Cannot build both shared and static libs with MSVC or icl.
3800             disable static
3801         fi
3802         shlibdir_default="$bindir_default"
3803         SLIBPREF=""
3804         SLIBSUF=".dll"
3805         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3806         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3807         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3808         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3809         SLIB_INSTALL_LINKS=
3810         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3811         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3812         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3813         objformat="win32"
3814         ranlib=:
3815         enable dos_paths
3816         ;;
3817     cygwin*)
3818         target_os=cygwin
3819         shlibdir_default="$bindir_default"
3820         SLIBPREF="cyg"
3821         SLIBSUF=".dll"
3822         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3823         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3824         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3825         SLIB_INSTALL_LINKS=
3826         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3827         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3828         objformat="win32"
3829         enable dos_paths
3830         ;;
3831     *-dos|freedos|opendos)
3832         network_extralibs="-lsocket"
3833         objformat="coff"
3834         enable dos_paths
3835         add_cppflags -U__STRICT_ANSI__
3836         ;;
3837     linux)
3838         enable dv1394
3839         enable section_data_rel_ro
3840         ;;
3841     irix*)
3842         target_os=irix
3843         ranlib="echo ignoring ranlib"
3844         ;;
3845     os/2*)
3846         ln_s="cp -f"
3847         objformat="aout"
3848         add_cppflags -D_GNU_SOURCE
3849         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3850         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3851         LIBSUF="_s.a"
3852         SLIBPREF=""
3853         SLIBSUF=".dll"
3854         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3855         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3856         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3857             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3858             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3859             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3860             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3861         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3862             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3863         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3864         enable dos_paths
3865         ;;
3866     gnu/kfreebsd)
3867         add_cppflags -D_BSD_SOURCE
3868         ;;
3869     gnu)
3870         ;;
3871     qnx)
3872         add_cppflags -D_QNX_SOURCE
3873         network_extralibs="-lsocket"
3874         ;;
3875     symbian)
3876         SLIBSUF=".dll"
3877         enable dos_paths
3878         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3879         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3880         add_ldflags -Wl,--target1-abs,--no-undefined \
3881                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3882                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3883         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3884                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3885                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3886         ;;
3887     osf1)
3888         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3889         ;;
3890     minix)
3891         ;;
3892     plan9)
3893         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3894                      -D_REENTRANT_SOURCE        \
3895                      -D_RESEARCH_SOURCE         \
3896                      -DFD_SETSIZE=96            \
3897                      -DHAVE_SOCK_OPTS
3898         add_compat strtod.o strtod=avpriv_strtod
3899         network_extralibs='-lbsd'
3900         exeobjs=compat/plan9/main.o
3901         cp_f='cp'
3902         ;;
3903     none)
3904         ;;
3905     *)
3906         die "Unknown OS '$target_os'."
3907         ;;
3908 esac
3909
3910 # determine libc flavour
3911
3912 probe_libc(){
3913     pfx=$1
3914     pfx_no_=${pfx%_}
3915     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3916     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3917         eval ${pfx}libc_type=uclibc
3918         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3919     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3920         eval ${pfx}libc_type=glibc
3921         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3922     # MinGW headers can be installed on Cygwin, so check for newlib first.
3923     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3924         eval ${pfx}libc_type=newlib
3925         add_${pfx}cppflags -U__STRICT_ANSI__
3926     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3927     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3928         eval ${pfx}libc_type=mingw64
3929         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3930         eval test \$${pfx_no_}cc_type = "gcc" &&
3931             add_${pfx}cppflags -D__printf__=__gnu_printf__
3932     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3933          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3934         eval ${pfx}libc_type=mingw32
3935         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3936             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3937             die "ERROR: MinGW32 runtime version must be >= 3.15."
3938         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3939         eval test \$${pfx_no_}cc_type = "gcc" &&
3940             add_${pfx}cppflags -D__printf__=__gnu_printf__
3941     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3942         eval ${pfx}libc_type=msvcrt
3943         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3944             if [ "$pfx" = host_ ]; then
3945                 add_host_cppflags -Dsnprintf=_snprintf
3946             else
3947                 add_compat strtod.o strtod=avpriv_strtod
3948                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3949                                              _snprintf=avpriv_snprintf  \
3950                                              vsnprintf=avpriv_vsnprintf
3951             fi
3952         fi
3953         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3954         # 0x601 by default unless something else is set by the user.
3955         # This can easily lead to us detecting functions only present
3956         # in such new versions and producing binaries requiring windows 7.0.
3957         # Therefore explicitly set the default to XP unless the user has
3958         # set something else on the command line.
3959         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3960         # family. For these cases, configure is free to use any functions
3961         # found in the SDK headers by default. (Alternatively, we could force
3962         # _WIN32_WINNT to 0x0602 in that case.)
3963         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3964             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3965 #ifdef WINAPI_FAMILY
3966 #include <winapifamily.h>
3967 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3968 #error not desktop
3969 #endif
3970 #endif
3971 EOF
3972     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3973         eval ${pfx}libc_type=klibc
3974     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3975         eval ${pfx}libc_type=bionic
3976     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3977         eval ${pfx}libc_type=solaris
3978         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3979     else
3980         eval ${pfx}libc_type=default
3981         add_${pfx}cppflags -D_DEFAULT_SOURCE
3982     fi
3983 }
3984
3985 probe_libc
3986 test -n "$libc_type" && enable libc_$libc_type
3987 probe_libc host_
3988 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3989
3990 case $libc_type in
3991     bionic)
3992         add_compat strtod.o strtod=avpriv_strtod
3993         ;;
3994 esac
3995
3996 # hacks for compiler/libc/os combinations
3997
3998 if enabled_all tms470 libc_glibc; then
3999     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4000     add_cppflags -D__USER_LABEL_PREFIX__=
4001     add_cppflags -D__builtin_memset=memset
4002     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4003     add_cflags   -pds=48    # incompatible redefinition of macro
4004 fi
4005
4006 if enabled_all ccc libc_glibc; then
4007     add_ldflags -Wl,-z,now  # calls to libots crash without this
4008 fi
4009
4010 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4011     add_cppflags '-I\$(SRC_PATH)/compat/float'
4012
4013 esc(){
4014     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4015 }
4016
4017 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4018
4019 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4020
4021 set_default $PATHS_LIST
4022 set_default nm
4023
4024 # we need to build at least one lib type
4025 if ! enabled_any static shared; then
4026     cat <<EOF
4027 At least one library type must be built.
4028 Specify --enable-static to build the static libraries or --enable-shared to
4029 build the shared libraries as well. To only build the shared libraries specify
4030 --disable-static in addition to --enable-shared.
4031 EOF
4032     exit 1;
4033 fi
4034
4035 die_license_disabled() {
4036     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4037 }
4038
4039 die_license_disabled gpl libcdio
4040 die_license_disabled gpl libx264
4041 die_license_disabled gpl libx265
4042 die_license_disabled gpl libxavs
4043 die_license_disabled gpl libxvid
4044 die_license_disabled gpl x11grab
4045
4046 die_license_disabled nonfree libfaac
4047 die_license_disabled nonfree libfdk_aac
4048 die_license_disabled nonfree nvenc
4049 die_license_disabled nonfree openssl
4050
4051 die_license_disabled version3 libopencore_amrnb
4052 die_license_disabled version3 libopencore_amrwb
4053 die_license_disabled version3 libvo_aacenc
4054 die_license_disabled version3 libvo_amrwbenc
4055
4056 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4057
4058 disabled optimizations || check_cflags -fomit-frame-pointer
4059
4060 enable_weak_pic() {
4061     disabled pic && return
4062     enable pic
4063     add_cppflags -DPIC
4064     case "$target_os" in
4065     mingw*|cygwin*)
4066         ;;
4067     *)
4068         add_cflags -fPIC
4069         ;;
4070     esac
4071     add_asflags  -fPIC
4072 }
4073
4074 enabled pic && enable_weak_pic
4075
4076 check_cc <<EOF || die "Symbol mangling check failed."
4077 int ff_extern;
4078 EOF
4079 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4080 extern_prefix=${sym%%ff_extern*}
4081
4082 check_cc <<EOF && enable_weak inline_asm
4083 void foo(void) { __asm__ volatile ("" ::); }
4084 EOF
4085
4086 _restrict=
4087 for restrict_keyword in restrict __restrict__ __restrict; do
4088     check_cc <<EOF && _restrict=$restrict_keyword && break
4089 void foo(char * $restrict_keyword p);
4090 EOF
4091 done
4092
4093 check_cc <<EOF && enable pragma_deprecated
4094 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4095 EOF
4096
4097 check_cc <<EOF && enable attribute_packed
4098 struct { int x; } __attribute__((packed)) x;
4099 EOF
4100
4101 check_cc <<EOF && enable attribute_may_alias
4102 union { int x; } __attribute__((may_alias)) x;
4103 EOF
4104
4105 check_cc <<EOF || die "endian test failed"
4106 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4107 EOF
4108 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4109
4110 check_gas() {
4111     log "check_gas using '$as' as AS"
4112     # :vararg is used on aarch64, arm and ppc altivec
4113     check_as <<EOF || return 1
4114 .macro m n, y:vararg=0
4115 \n: .int \y
4116 .endm
4117 m x
4118 EOF
4119     # .altmacro is only used in arm asm
4120     ! enabled arm || check_as <<EOF || return 1
4121 .altmacro
4122 EOF
4123     enable gnu_as
4124     return 0
4125 }
4126
4127 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4128     nogas=:
4129     enabled_any arm aarch64 && nogas=die
4130     enabled_all ppc altivec && nogas=warn
4131     as_noop=-v
4132
4133     case $as_type in
4134         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4135         gcc)  gaspp_as_type=gas ;;
4136         *)    gaspp_as_type=$as_type ;;
4137     esac
4138
4139     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4140
4141     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4142         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4143
4144     if ! check_gas ; then
4145         as=${gas:=$as}
4146         check_gas || \
4147             $nogas "GNU assembler not found, install/update gas-preprocessor"
4148     fi
4149
4150     check_as <<EOF && enable as_func
4151 .func test
4152 .endfunc
4153 EOF
4154 fi
4155
4156 check_inline_asm inline_asm_labels '"1:\n"'
4157
4158 if enabled aarch64; then
4159     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4160     # internal assembler in clang 3.3 does not support this instruction
4161     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4162     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4163
4164     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4165
4166 elif enabled alpha; then
4167
4168     check_cflags -mieee
4169
4170 elif enabled arm; then
4171
4172     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4173     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4174     enabled thumb && check_cflags -mthumb || check_cflags -marm
4175
4176     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4177         enable vfp_args
4178     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4179         enable vfp_args
4180     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4181         case "${cross_prefix:-$cc}" in
4182             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4183             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4184 __asm__ (".eabi_attribute 28, 1");
4185 int main(void) { return 0; }
4186 EOF
4187         esac
4188         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4189     fi
4190
4191     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4192     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4193     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4194     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4195     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4196     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4197
4198     [ $target_os = linux ] || [ $target_os = android ] ||
4199         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4200             $ARCH_EXT_LIST_ARM
4201
4202     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4203
4204     check_as <<EOF && enable as_dn_directive
4205 ra .dn d0.i16
4206 .unreq ra
4207 EOF
4208
4209     # llvm's integrated assembler supports .object_arch from llvm 3.5
4210     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4211 .object_arch armv4
4212 EOF
4213
4214     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4215
4216 elif enabled mips; then
4217
4218     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4219
4220     # make sure that only an instruction set is enabled
4221     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4222
4223     if enabled mips64; then
4224         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4225             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4226                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4227     else
4228         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4229             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4230                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4231     fi
4232
4233 elif enabled parisc; then
4234
4235     if enabled gcc; then
4236         case $($cc -dumpversion) in
4237             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4238         esac
4239     fi
4240
4241 elif enabled ppc; then
4242
4243     enable local_aligned_8 local_aligned_16
4244
4245     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4246     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4247     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4248     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4249
4250     # AltiVec flags: The FSF version of GCC differs from the Apple version
4251     if enabled altivec; then
4252         check_cflags -maltivec -mabi=altivec &&
4253         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4254         check_cflags -faltivec
4255
4256         # check if our compiler supports Motorola AltiVec C API
4257         check_cc <<EOF || disable altivec
4258 $inc_altivec_h
4259 int main(void) {
4260     vector signed int v1 = (vector signed int) { 0 };
4261     vector signed int v2 = (vector signed int) { 1 };
4262     v1 = vec_add(v1, v2);
4263     return 0;
4264 }
4265 EOF
4266
4267         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4268     fi
4269
4270     if enabled vsx; then
4271         check_cflags -mvsx &&
4272         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4273     fi
4274
4275     if enabled power8; then
4276         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4277     fi
4278
4279 elif enabled x86; then
4280
4281     check_builtin rdtsc    intrin.h   "__rdtsc()"
4282     check_builtin mm_empty mmintrin.h "_mm_empty()"
4283
4284     enable local_aligned_8 local_aligned_16
4285
4286     # check whether EBP is available on x86
4287     # As 'i' is stored on the stack, this program will crash
4288     # if the base pointer is used to access it because the
4289     # base pointer is cleared in the inline assembly code.
4290     check_exec_crash <<EOF && enable ebp_available
4291 volatile int i=0;
4292 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4293 return i;
4294 EOF
4295
4296     # check whether EBX is available on x86
4297     check_inline_asm ebx_available '""::"b"(0)' &&
4298         check_inline_asm ebx_available '"":::"%ebx"'
4299
4300     # check whether xmm clobbers are supported
4301     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4302
4303     # check whether binutils is new enough to compile SSSE3/MMXEXT
4304     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4305     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4306
4307     if ! disabled_any asm mmx yasm; then
4308         if check_cmd $yasmexe --version; then
4309             enabled x86_64 && yasm_extra="-m amd64"
4310             yasm_debug="-g dwarf2"
4311         elif check_cmd nasm -v; then
4312             yasmexe=nasm
4313             yasm_debug="-g -F dwarf"
4314             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4315         fi
4316
4317         YASMFLAGS="-f $objformat $yasm_extra"
4318         enabled pic               && append YASMFLAGS "-DPIC"
4319         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4320         case "$objformat" in
4321             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4322         esac
4323
4324         check_yasm "movbe ecx, [5]" && enable yasm ||
4325             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4326         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4327         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4328         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4329         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4330         check_yasm "CPU amdnop" || disable cpunop
4331     fi
4332
4333     case "$cpu" in
4334         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4335             disable fast_clz
4336         ;;
4337     esac
4338
4339 fi
4340
4341 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4342
4343 check_ldflags -Wl,--as-needed
4344
4345 if check_func dlopen; then
4346     ldl=
4347 elif check_func dlopen -ldl; then
4348     ldl=-ldl
4349 fi
4350
4351 if ! disabled network; then
4352     check_func getaddrinfo $network_extralibs
4353     check_func inet_aton $network_extralibs
4354
4355     check_type netdb.h "struct addrinfo"
4356     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4357     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4358     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4359     check_type poll.h "struct pollfd"
4360     check_type netinet/sctp.h "struct sctp_event_subscribe"
4361     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4362     check_type netinet/in.h "struct sockaddr_in6"
4363     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4364     check_type "sys/types.h sys/socket.h" socklen_t
4365
4366     # Prefer arpa/inet.h over winsock2
4367     if check_header arpa/inet.h ; then
4368         check_func closesocket
4369     elif check_header winsock2.h ; then
4370         check_func_headers winsock2.h closesocket -lws2 &&
4371             network_extralibs="-lws2" ||
4372         { check_func_headers winsock2.h closesocket -lws2_32 &&
4373             network_extralibs="-lws2_32"; } || disable winsock2_h network
4374         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4375
4376         check_type ws2tcpip.h socklen_t
4377         check_type ws2tcpip.h "struct addrinfo"
4378         check_type ws2tcpip.h "struct group_source_req"
4379         check_type ws2tcpip.h "struct ip_mreq_source"
4380         check_type ws2tcpip.h "struct ipv6_mreq"
4381         check_type winsock2.h "struct pollfd"
4382         check_struct winsock2.h "struct sockaddr" sa_len
4383         check_type ws2tcpip.h "struct sockaddr_in6"
4384         check_type ws2tcpip.h "struct sockaddr_storage"
4385     else
4386         disable network
4387     fi
4388 fi
4389
4390 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4391 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4392 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4393 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4394
4395 case "$custom_allocator" in
4396     jemalloc)
4397         # jemalloc by default does not use a prefix
4398         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4399     ;;
4400     tcmalloc)
4401         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4402         malloc_prefix=tc_
4403     ;;
4404 esac
4405
4406 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4407 check_func  ${malloc_prefix}memalign            && enable memalign
4408 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4409
4410 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4411     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4412
4413 check_func  fcntl
4414 check_func  fork
4415 check_func  gethrtime
4416 check_func  getopt
4417 check_func  getrusage
4418 check_func  gettimeofday
4419 check_func  gmtime_r
4420 check_func  isatty
4421 check_func  localtime_r
4422 check_func  mach_absolute_time
4423 check_func  mkstemp
4424 check_func  mmap
4425 check_func  mprotect
4426 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4427 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4428 check_func  sched_getaffinity
4429 check_func  setrlimit
4430 check_func  strerror_r
4431 check_func  sysconf
4432 check_func  sysctl
4433 check_func  usleep
4434
4435 check_func_headers io.h setmode
4436 check_func_headers stdlib.h getenv
4437
4438 check_func_headers windows.h CoTaskMemFree -lole32
4439 check_func_headers windows.h GetProcessAffinityMask
4440 check_func_headers windows.h GetProcessTimes
4441 check_func_headers windows.h GetSystemTimeAsFileTime
4442 check_func_headers windows.h LoadLibrary
4443 check_func_headers windows.h MapViewOfFile
4444 check_func_headers windows.h SetConsoleTextAttribute
4445 check_func_headers windows.h Sleep
4446 check_func_headers windows.h VirtualAlloc
4447 check_struct windows.h "CONDITION_VARIABLE" Ptr
4448
4449 check_header direct.h
4450 check_header dlfcn.h
4451 check_header d3d11.h
4452 check_header dxva.h
4453 check_header dxva2api.h
4454 check_header io.h
4455 check_header mach/mach_time.h
4456 check_header malloc.h
4457 check_header poll.h
4458 check_header sys/mman.h
4459 check_header sys/param.h
4460 check_header sys/resource.h
4461 check_header sys/select.h
4462 check_header sys/time.h
4463 check_header sys/un.h
4464 check_header unistd.h
4465 check_header valgrind/valgrind.h
4466 check_header vdpau/vdpau.h
4467 check_header vdpau/vdpau_x11.h
4468 check_header VideoDecodeAcceleration/VDADecoder.h
4469 check_header windows.h
4470 check_header X11/extensions/XvMClib.h
4471
4472 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4473 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4474 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4475
4476 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4477
4478 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4479 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4480 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4481
4482 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4483
4484 if ! disabled w32threads && ! enabled pthreads; then
4485     check_func_headers "windows.h process.h" _beginthreadex &&
4486         enable w32threads || disable w32threads
4487 fi
4488
4489 # check for some common methods of building with pthread support
4490 # do this before the optional library checks as some of them require pthreads
4491 if ! disabled pthreads && ! enabled w32threads; then
4492     enable pthreads
4493     if check_func pthread_join -pthread; then
4494         add_cflags -pthread
4495         add_extralibs -pthread
4496     elif check_func pthread_join -pthreads; then
4497         add_cflags -pthreads
4498         add_extralibs -pthreads
4499     elif check_func pthread_join -lpthreadGC2; then
4500         add_extralibs -lpthreadGC2
4501     elif check_lib pthread.h pthread_join -lpthread; then
4502         :
4503     elif ! check_func pthread_join; then
4504         disable pthreads
4505     fi
4506 fi
4507
4508 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4509 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4510
4511 check_lib math.h sin -lm && LIBM="-lm"
4512 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4513
4514 atan2f_args=2
4515 ldexpf_args=2
4516 powf_args=2
4517
4518 for func in $MATH_FUNCS; do
4519     eval check_mathfunc $func \${${func}_args:-1}
4520 done
4521
4522 # these are off by default, so fail if requested and not available
4523 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4524                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4525                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4526 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4527 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4528 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4529 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4530 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4531 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4532 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4533 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4534 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4535                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4536                                done || die "ERROR: libgsm not found"; }
4537 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4538 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4539 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4540 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4541 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4542 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4543 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4544 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4545 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4546                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4547 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4548 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4549 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4550 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4551 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4552 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4553 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4554 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4555 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4556 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4557 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4558 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4559     enabled libvpx_vp8_decoder && {
4560         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4561             disable libvpx_vp8_decoder;
4562     }
4563     enabled libvpx_vp8_encoder && {
4564         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4565             disable libvpx_vp8_encoder;
4566     }
4567     enabled libvpx_vp9_decoder && {
4568         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4569             disable libvpx_vp9_decoder;
4570     }
4571     enabled libvpx_vp9_encoder && {
4572         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4573             disable libvpx_vp9_encoder;
4574     }
4575     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4576         die "libvpx enabled but no supported decoders found"
4577     fi
4578 }
4579 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4580 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4581 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4582                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4583                                die "ERROR: libx264 version must be >= 0.118."; } &&
4584                              { check_cpp_condition x264.h "X264_MPEG2" &&
4585                                enable libx262; }
4586 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4587                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4588                                die "ERROR: libx265 version must be >= 57."; }
4589 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4590 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4591 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4592                                 { ! enabled cross_compile && {
4593                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4594                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4595                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4596                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4597                                die "ERROR: mmal not found"; }
4598 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4599                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4600                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4601                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4602                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4603                                die "ERROR: openssl not found"; }
4604
4605 if enabled gnutls; then
4606     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4607     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4608 fi
4609
4610 # libdc1394 check
4611 if enabled libdc1394; then
4612     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4613         enable libdc1394_2; } ||
4614     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4615         enable libdc1394_1; } ||
4616     die "ERROR: No version of libdc1394 found "
4617 fi
4618
4619 if enabled nvenc; then
4620     check_header cuda.h || die "ERROR: cuda.h not found.";
4621     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4622     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4623         die "ERROR: NVENC API version 4 or older is not supported";
4624 fi
4625
4626 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4627     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4628     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4629     enable sdl
4630 fi
4631
4632 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4633 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4634
4635 check_header linux/fb.h
4636 check_header linux/videodev2.h
4637 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4638
4639 check_header AVFoundation/AVFoundation.h &&
4640     check_objcflags -fobjc-arc &&
4641     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4642     disable AVFoundation_AVFoundation_h
4643
4644 check_header sys/videoio.h
4645
4646 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4647 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4648 # w32api 3.12 had it defined wrong
4649 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4650
4651 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4652 { check_header dev/bktr/ioctl_meteor.h &&
4653   check_header dev/bktr/ioctl_bt848.h; } ||
4654 { check_header machine/ioctl_meteor.h &&
4655   check_header machine/ioctl_bt848.h; } ||
4656 { check_header dev/video/meteor/ioctl_meteor.h &&
4657   check_header dev/video/bktr/ioctl_bt848.h; } ||
4658 check_header dev/ic/bt8xx.h
4659
4660 check_header sndio.h
4661 check_header sys/soundcard.h
4662 check_header soundcard.h
4663
4664 enabled_any alsa_indev alsa_outdev &&
4665     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4666
4667 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4668     check_func jack_port_get_latency_range -ljack
4669
4670 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4671
4672 if enabled libcdio; then
4673     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4674     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4675     die "ERROR: No usable libcdio/cdparanoia found"
4676 fi
4677
4678 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4679
4680 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4681     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4682         enabled libxcb && die "ERROR: libxcb not found";
4683     } && disable x11grab && enable libxcb
4684
4685     disabled libxcb_shm ||
4686         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4687             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4688         } && check_header sys/shm.h && enable libxcb_shm
4689
4690     disabled libxcb_xfixes ||
4691         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4692             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4693         } && enable libxcb_xfixes
4694
4695     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4696     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4697 fi
4698
4699 if enabled x11grab; then
4700     enabled xlib || die "ERROR: Xlib not found"
4701     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4702     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4703 fi
4704
4705 enabled vaapi && enabled xlib &&
4706     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4707     enable vaapi_x11
4708
4709 enabled vdpau &&
4710     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4711     disable vdpau
4712
4713 enabled vdpau && enabled xlib &&
4714     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4715     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4716     enable vdpau_x11
4717
4718 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4719
4720 # add some useful compiler flags if supported
4721 check_cflags -Wdeclaration-after-statement
4722 check_cflags -Wall
4723 check_cflags -Wdisabled-optimization
4724 check_cflags -Wpointer-arith
4725 check_cflags -Wredundant-decls
4726 check_cflags -Wwrite-strings
4727 check_cflags -Wtype-limits
4728 check_cflags -Wundef
4729 check_cflags -Wmissing-prototypes
4730 check_cflags -Wstrict-prototypes
4731 enabled extra_warnings && check_cflags -Winline
4732 enabled extra_warnings && check_cflags -Wcast-qual
4733
4734 check_disable_warning(){
4735     warning_flag=-W${1#-Wno-}
4736     test_cflags $warning_flag && add_cflags $1
4737 }
4738
4739 check_disable_warning -Wno-parentheses
4740 check_disable_warning -Wno-switch
4741 check_disable_warning -Wno-format-zero-length
4742 check_disable_warning -Wno-pointer-sign
4743
4744 # add some linker flags
4745 check_ldflags -Wl,--warn-common
4746 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4747 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4748 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4749
4750 # add some strip flags
4751 # -wN '..@*' is more selective than -x, but not available everywhere.
4752 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4753
4754 enabled neon_clobber_test &&
4755     check_ldflags -Wl,--wrap,avcodec_open2              \
4756                   -Wl,--wrap,avcodec_decode_audio4      \
4757                   -Wl,--wrap,avcodec_decode_video2      \
4758                   -Wl,--wrap,avcodec_decode_subtitle2   \
4759                   -Wl,--wrap,avcodec_encode_audio2      \
4760                   -Wl,--wrap,avcodec_encode_video2      \
4761                   -Wl,--wrap,avcodec_encode_subtitle    \
4762                   -Wl,--wrap,avresample_convert ||
4763     disable neon_clobber_test
4764
4765 enabled xmm_clobber_test &&
4766     check_ldflags -Wl,--wrap,avcodec_open2              \
4767                   -Wl,--wrap,avcodec_decode_audio4      \
4768                   -Wl,--wrap,avcodec_decode_video2      \
4769                   -Wl,--wrap,avcodec_decode_subtitle2   \
4770                   -Wl,--wrap,avcodec_encode_audio2      \
4771                   -Wl,--wrap,avcodec_encode_video2      \
4772                   -Wl,--wrap,avcodec_encode_subtitle    \
4773                   -Wl,--wrap,avresample_convert         \
4774                   -Wl,--wrap,sws_scale ||
4775     disable xmm_clobber_test
4776
4777 echo "X { local: *; };" > $TMPV
4778 if test_ldflags -Wl,--version-script,$TMPV; then
4779     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4780 elif test_ldflags -Wl,-M,$TMPV; then
4781     append SHFLAGS '-Wl,-M,\$(SUBDIR)lib\$(NAME).ver-sol2'
4782 fi
4783
4784 check_cc <<EOF && enable symver_asm_label
4785 void ff_foo(void) __asm__ ("av_foo@VERSION");
4786 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4787 EOF
4788     check_cc <<EOF && enable symver_gnu_asm
4789 __asm__(".symver ff_foo,av_foo@VERSION");
4790 void ff_foo(void) {}
4791 EOF
4792
4793 if [ -z "$optflags" ]; then
4794     if enabled small; then
4795         optflags=$cflags_size
4796     elif enabled optimizations; then
4797         optflags=$cflags_speed
4798     else
4799         optflags=$cflags_noopt
4800     fi
4801 fi
4802
4803 check_optflags(){
4804     check_cflags "$@"
4805     enabled lto && check_ldflags "$@"
4806 }
4807
4808
4809 if enabled lto; then
4810     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4811     check_cflags