Screenpresso SPV1 decoder
[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-libmfx          enable HW acceleration through libmfx
195   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
196   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
197   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
198   --enable-libopencv       enable video filtering via libopencv [no]
199   --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
200   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
201   --enable-libopus         enable Opus de/encoding via libopus [no]
202   --enable-libpulse        enable Pulseaudio input via libpulse [no]
203   --enable-librtmp         enable RTMP[E] support via librtmp [no]
204   --enable-libschroedinger enable Dirac de/encoding via libschroedinger [no]
205   --enable-libsnappy       enable Snappy compression [no]
206   --enable-libspeex        enable Speex de/encoding via libspeex [no]
207   --enable-libtheora       enable Theora encoding via libtheora [no]
208   --enable-libtwolame      enable MP2 encoding via libtwolame [no]
209   --enable-libvo-aacenc    enable AAC encoding via libvo-aacenc [no]
210   --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
211   --enable-libvorbis       enable Vorbis encoding via libvorbis [no]
212   --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
213   --enable-libwavpack      enable wavpack encoding via libwavpack [no]
214   --enable-libwebp         enable WebP encoding via libwebp [no]
215   --enable-libx264         enable H.264 encoding via x264 [no]
216   --enable-libx265         enable HEVC encoding via x265 [no]
217   --enable-libxavs         enable AVS encoding via xavs [no]
218   --enable-libxcb          enable X11 grabbing using XCB [no]
219   --enable-libxcb-shm      enable X11 grabbing shm communication [auto]
220   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
221   --enable-libxvid         enable Xvid encoding via xvidcore,
222                            native MPEG-4/Xvid encoder exists [no]
223   --enable-mmal            enable decoding via MMAL [no]
224   --enable-nvenc           enable encoding via NVENC [no]
225   --enable-openssl         enable openssl [no]
226   --enable-x11grab         enable X11 grabbing (legacy) [no]
227   --enable-zlib            enable zlib [autodetect]
228
229 Toolchain options:
230   --arch=ARCH              select architecture [$arch]
231   --cpu=CPU                select the minimum required CPU (affects
232                            instruction selection, may crash on older CPUs)
233   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
234   --enable-cross-compile   assume a cross-compiler is used
235   --sysroot=PATH           root of cross-build tree
236   --sysinclude=PATH        location of cross-build system headers
237   --target-os=OS           compiler targets OS [$target_os]
238   --target-exec=CMD        command to run executables on target
239   --target-path=DIR        path to view of build directory on target
240   --target-samples=DIR     path to samples directory on target
241   --toolchain=NAME         set tool defaults according to NAME
242   --nm=NM                  use nm tool
243   --ar=AR                  use archive tool AR [$ar_default]
244   --as=AS                  use assembler AS [$as_default]
245   --cc=CC                  use C compiler CC [$cc_default]
246   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
247   --ld=LD                  use linker LD
248   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
249   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
250   --host-cc=HOSTCC         use host C compiler HOSTCC
251   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
252   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
253   --host-ld=HOSTLD         use host linker HOSTLD
254   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
255   --host-libs=HLIBS        use libs HLIBS when linking for host
256   --host-os=OS             compiler host OS [$target_os]
257   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
258   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
259   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
260   --extra-libs=ELIBS       add ELIBS [$ELIBS]
261   --extra-version=STRING   version string suffix []
262   --optflags=OPTFLAGS      override optimization-related compiler flags
263   --build-suffix=SUFFIX    library name suffix []
264   --enable-pic             build position-independent code
265   --enable-thumb           compile for Thumb instruction set
266   --enable-lto             use link-time optimization
267   --env="ENV=override"     override the environment variables
268
269 Advanced options (experts only):
270   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
271   --disable-symver         disable symbol versioning
272   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
273   --disable-safe-bitstream-reader
274                            disable buffer boundary checking in bitreaders
275                            (faster, but may crash)
276   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
277   --enable-sram            allow use of on-chip SRAM
278
279 Optimization options (experts only):
280   --disable-asm            disable all assembly optimizations
281   --disable-altivec        disable AltiVec optimizations
282   --disable-vsx            disable VSX optimizations
283   --disable-power8         disable POWER8 optimizations
284   --disable-amd3dnow       disable 3DNow! optimizations
285   --disable-amd3dnowext    disable 3DNow! extended optimizations
286   --disable-mmx            disable MMX optimizations
287   --disable-mmxext         disable MMXEXT optimizations
288   --disable-sse            disable SSE optimizations
289   --disable-sse2           disable SSE2 optimizations
290   --disable-sse3           disable SSE3 optimizations
291   --disable-ssse3          disable SSSE3 optimizations
292   --disable-sse4           disable SSE4 optimizations
293   --disable-sse42          disable SSE4.2 optimizations
294   --disable-avx            disable AVX optimizations
295   --disable-xop            disable XOP optimizations
296   --disable-fma3           disable FMA3 optimizations
297   --disable-fma4           disable FMA4 optimizations
298   --disable-avx2           disable AVX2 optimizations
299   --disable-armv5te        disable armv5te optimizations
300   --disable-armv6          disable armv6 optimizations
301   --disable-armv6t2        disable armv6t2 optimizations
302   --disable-vfp            disable VFP optimizations
303   --disable-neon           disable NEON optimizations
304   --disable-inline-asm     disable use of inline assembly
305   --disable-yasm           disable use of nasm/yasm assembly
306
307 Developer options (useful when working on Libav itself):
308   --disable-debug          disable debugging symbols
309   --enable-debug=LEVEL     set the debug level [$debuglevel]
310   --disable-optimizations  disable compiler optimizations
311   --enable-extra-warnings  enable more compiler warnings
312   --samples=PATH           location of test samples for FATE, if not set use
313                            \$LIBAV_SAMPLES at make invocation time.
314   --enable-neon-clobber-test check NEON registers for clobbering (should be
315                            used only for debugging purposes)
316   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
317                            should be used only for debugging purposes)
318   --enable-random          randomly enable/disable components
319   --disable-random
320   --enable-random=LIST     randomly enable/disable specific components or
321   --disable-random=LIST    component groups. LIST is a comma-separated list
322                            of NAME[:PROB] entries where NAME is a component
323                            (group) and PROB the probability associated with
324                            NAME (default 0.5).
325   --random-seed=VALUE      seed value for --enable/disable-random
326   --disable-valgrind-backtrace do not print a backtrace under Valgrind
327                            (only applies to --disable-optimizations builds)
328
329 NOTE: Object files are built at the place where configure is launched.
330 EOF
331   exit 0
332 }
333
334 quotes='""'
335
336 log(){
337     echo "$@" >> $logfile
338 }
339
340 log_file(){
341     log BEGIN $1
342     pr -n -t $1 >> $logfile
343     log END $1
344 }
345
346 echolog(){
347     log "$@"
348     echo "$@"
349 }
350
351 warn(){
352     log "WARNING: $*"
353     WARNINGS="${WARNINGS}WARNING: $*\n"
354 }
355
356 die(){
357     echolog "$@"
358     cat <<EOF
359
360 If you think configure made a mistake, make sure you are using the latest
361 version from Git.  If the latest version fails, report the problem to the
362 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
363 EOF
364     if disabled logging; then
365         cat <<EOF
366 Rerun configure with logging enabled (do not use --disable-logging), and
367 include the log this produces with your report.
368 EOF
369     else
370         cat <<EOF
371 Include the log file "$logfile" produced by configure as this will help
372 solving the problem.
373 EOF
374     fi
375     exit 1
376 }
377
378 # Avoid locale weirdness, besides we really just want to translate ASCII.
379 toupper(){
380     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
381 }
382
383 tolower(){
384     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
385 }
386
387 c_escape(){
388     echo "$*" | sed 's/["\\]/\\\0/g'
389 }
390
391 sh_quote(){
392     v=$(echo "$1" | sed "s/'/'\\\\''/g")
393     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
394     echo "$v"
395 }
396
397 cleanws(){
398     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
399 }
400
401 filter(){
402     pat=$1
403     shift
404     for v; do
405         eval "case $v in $pat) echo $v ;; esac"
406     done
407 }
408
409 filter_out(){
410     pat=$1
411     shift
412     for v; do
413         eval "case $v in $pat) ;; *) echo $v ;; esac"
414     done
415 }
416
417 map(){
418     m=$1
419     shift
420     for v; do eval $m; done
421 }
422
423 add_suffix(){
424     suffix=$1
425     shift
426     for v; do echo ${v}${suffix}; done
427 }
428
429 set_all(){
430     value=$1
431     shift
432     for var in $*; do
433         eval $var=$value
434     done
435 }
436
437 set_weak(){
438     value=$1
439     shift
440     for var; do
441         eval : \${$var:=$value}
442     done
443 }
444
445 sanitize_var_name(){
446     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
447 }
448
449 set_safe(){
450     var=$1
451     shift
452     eval $(sanitize_var_name "$var")='$*'
453 }
454
455 get_safe(){
456     eval echo \$$(sanitize_var_name "$1")
457 }
458
459 pushvar(){
460     for pvar in $*; do
461         eval level=\${${pvar}_level:=0}
462         eval ${pvar}_${level}="\$$pvar"
463         eval ${pvar}_level=$(($level+1))
464     done
465 }
466
467 popvar(){
468     for pvar in $*; do
469         eval level=\${${pvar}_level:-0}
470         test $level = 0 && continue
471         eval level=$(($level-1))
472         eval $pvar="\${${pvar}_${level}}"
473         eval ${pvar}_level=$level
474         eval unset ${pvar}_${level}
475     done
476 }
477
478 enable(){
479     set_all yes $*
480 }
481
482 disable(){
483     set_all no $*
484 }
485
486 enable_weak(){
487     set_weak yes $*
488 }
489
490 disable_weak(){
491     set_weak no $*
492 }
493
494 enable_safe(){
495     for var; do
496         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
497     done
498 }
499
500 disable_safe(){
501     for var; do
502         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
503     done
504 }
505
506 do_enable_deep(){
507     for var; do
508         enabled $var && continue
509         eval sel="\$${var}_select"
510         eval sgs="\$${var}_suggest"
511         pushvar var sgs
512         enable_deep $sel
513         popvar sgs
514         enable_deep_weak $sgs
515         popvar var
516     done
517 }
518
519 enable_deep(){
520     do_enable_deep $*
521     enable $*
522 }
523
524 enable_deep_weak(){
525     for var; do
526         disabled $var && continue
527         pushvar var
528         do_enable_deep $var
529         popvar var
530         enable_weak $var
531     done
532 }
533
534 enabled(){
535     test "${1#!}" = "$1" && op== || op=!=
536     eval test "x\$${1#!}" $op "xyes"
537 }
538
539 disabled(){
540     test "${1#!}" = "$1" && op== || op=!=
541     eval test "x\$${1#!}" $op "xno"
542 }
543
544 enabled_all(){
545     for opt; do
546         enabled $opt || return 1
547     done
548 }
549
550 disabled_all(){
551     for opt; do
552         disabled $opt || return 1
553     done
554 }
555
556 enabled_any(){
557     for opt; do
558         enabled $opt && return 0
559     done
560 }
561
562 disabled_any(){
563     for opt; do
564         disabled $opt && return 0
565     done
566     return 1
567 }
568
569 set_default(){
570     for opt; do
571         eval : \${$opt:=\$${opt}_default}
572     done
573 }
574
575 is_in(){
576     value=$1
577     shift
578     for var in $*; do
579         [ $var = $value ] && return 0
580     done
581     return 1
582 }
583
584 do_check_deps(){
585     for cfg; do
586         cfg="${cfg#!}"
587         enabled ${cfg}_checking && die "Circular dependency for $cfg."
588         disabled ${cfg}_checking && continue
589         enable ${cfg}_checking
590         append allopts $cfg
591
592         eval dep_all="\$${cfg}_deps"
593         eval dep_any="\$${cfg}_deps_any"
594         eval dep_sel="\$${cfg}_select"
595         eval dep_sgs="\$${cfg}_suggest"
596         eval dep_ifa="\$${cfg}_if"
597         eval dep_ifn="\$${cfg}_if_any"
598
599         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
600         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
601         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
602
603         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
604         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
605         enabled_all  $dep_all || disable $cfg
606         enabled_any  $dep_any || disable $cfg
607         disabled_any $dep_sel && disable $cfg
608
609         if enabled $cfg; then
610             enable_deep $dep_sel
611             enable_deep_weak $dep_sgs
612         fi
613
614         disable ${cfg}_checking
615     done
616 }
617
618 check_deps(){
619     unset allopts
620
621     do_check_deps "$@"
622
623     for cfg in $allopts; do
624         enabled $cfg || continue
625         eval dep_extralibs="\$${cfg}_extralibs"
626         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
627     done
628 }
629
630 print_config(){
631     pfx=$1
632     files=$2
633     shift 2
634     map 'eval echo "$v \${$v:-no}"' "$@" |
635     awk "BEGIN { split(\"$files\", files) }
636         {
637             c = \"$pfx\" toupper(\$1);
638             v = \$2;
639             sub(/yes/, 1, v);
640             sub(/no/,  0, v);
641             for (f in files) {
642                 file = files[f];
643                 if (file ~ /\\.h\$/) {
644                     printf(\"#define %s %d\\n\", c, v) >>file;
645                 } else if (file ~ /\\.asm\$/) {
646                     printf(\"%%define %s %d\\n\", c, v) >>file;
647                 } else if (file ~ /\\.mak\$/) {
648                     n = -v ? \"\" : \"!\";
649                     printf(\"%s%s=yes\\n\", n, c) >>file;
650                 }
651             }
652         }"
653 }
654
655 print_enabled(){
656     suf=$1
657     shift
658     for v; do
659         enabled $v && printf "%s\n" ${v%$suf};
660     done
661 }
662
663 append(){
664     var=$1
665     shift
666     eval "$var=\"\$$var $*\""
667 }
668
669 prepend(){
670     var=$1
671     shift
672     eval "$var=\"$* \$$var\""
673 }
674
675 unique(){
676     var=$1
677     uniq_list=""
678     for tok in $(eval echo \$$var); do
679         uniq_list="$(filter_out $tok $uniq_list) $tok"
680     done
681     eval "$var=\"${uniq_list}\""
682 }
683
684 add_cppflags(){
685     append CPPFLAGS "$@"
686 }
687
688 add_cflags(){
689     append CFLAGS $($cflags_filter "$@")
690 }
691
692 add_asflags(){
693     append ASFLAGS $($asflags_filter "$@")
694 }
695
696 add_ldflags(){
697     append LDFLAGS $($ldflags_filter "$@")
698 }
699
700 add_ldexeflags(){
701     append LDEXEFLAGS $($ldflags_filter "$@")
702 }
703
704 add_stripflags(){
705     append STRIPFLAGS "$@"
706 }
707
708 add_extralibs(){
709     prepend extralibs $($ldflags_filter "$@")
710 }
711
712 add_host_cppflags(){
713     append host_cppflags "$@"
714 }
715
716 add_host_cflags(){
717     append host_cflags $($host_cflags_filter "$@")
718 }
719
720 add_host_ldflags(){
721     append host_ldflags $($host_ldflags_filter "$@")
722 }
723
724 add_compat(){
725     append compat_objs $1
726     shift
727     map 'add_cppflags -D$v' "$@"
728 }
729
730 check_cmd(){
731     log "$@"
732     "$@" >> $logfile 2>&1
733 }
734
735 cc_o(){
736     eval printf '%s\\n' $CC_O
737 }
738
739 cc_e(){
740     eval printf '%s\\n' $CC_E
741 }
742
743 check_cc(){
744     log check_cc "$@"
745     cat > $TMPC
746     log_file $TMPC
747     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
748 }
749
750 check_cpp(){
751     log check_cpp "$@"
752     cat > $TMPC
753     log_file $TMPC
754     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
755 }
756
757 as_o(){
758     eval printf '%s\\n' $AS_O
759 }
760
761 check_as(){
762     log check_as "$@"
763     cat > $TMPS
764     log_file $TMPS
765     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
766 }
767
768 check_inline_asm(){
769     log check_inline_asm "$@"
770     name="$1"
771     code="$2"
772     shift 2
773     disable $name
774     check_cc "$@" <<EOF && enable $name
775 void foo(void){ __asm__ volatile($code); }
776 EOF
777 }
778
779 check_insn(){
780     log check_insn "$@"
781     check_inline_asm ${1}_inline "\"$2\""
782     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
783 }
784
785 check_yasm(){
786     log check_yasm "$@"
787     echo "$1" > $TMPS
788     log_file $TMPS
789     shift 1
790     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
791 }
792
793 ld_o(){
794     eval printf '%s\\n' $LD_O
795 }
796
797 check_ld(){
798     log check_ld "$@"
799     flags=$(filter_out '-l*' "$@")
800     libs=$(filter '-l*' "$@")
801     check_cc $($cflags_filter $flags) || return
802     flags=$($ldflags_filter $flags)
803     libs=$($ldflags_filter $libs)
804     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
805 }
806
807 print_include(){
808     hdr=$1
809     test "${hdr%.h}" = "${hdr}" &&
810         echo "#include $hdr"    ||
811         echo "#include <$hdr>"
812 }
813
814 check_code(){
815     log check_code "$@"
816     check=$1
817     headers=$2
818     code=$3
819     shift 3
820     {
821         for hdr in $headers; do
822             print_include $hdr
823         done
824         echo "int main(void) { $code; return 0; }"
825     } | check_$check "$@"
826 }
827
828 check_cppflags(){
829     log check_cppflags "$@"
830     check_cc "$@" <<EOF && append CPPFLAGS "$@"
831 int x;
832 EOF
833 }
834
835 test_cflags(){
836     log test_cflags "$@"
837     set -- $($cflags_filter "$@")
838     check_cc "$@" <<EOF
839 int x;
840 EOF
841 }
842
843 check_cflags(){
844     log check_cflags "$@"
845     test_cflags "$@" && add_cflags "$@"
846 }
847
848 test_ldflags(){
849     log test_ldflags "$@"
850     check_ld "$@" <<EOF
851 int main(void){ return 0; }
852 EOF
853 }
854
855 check_ldflags(){
856     log check_ldflags "$@"
857     test_ldflags "$@" && add_ldflags "$@"
858 }
859
860 test_stripflags(){
861     log test_stripflags "$@"
862     # call check_cc to get a fresh TMPO
863     check_cc <<EOF
864 int main(void) { return 0; }
865 EOF
866     check_cmd $strip $STRIPFLAGS "$@" $TMPO
867 }
868
869 check_stripflags(){
870     log check_stripflags "$@"
871     test_stripflags "$@" && add_stripflags "$@"
872 }
873
874 check_header(){
875     log check_header "$@"
876     header=$1
877     shift
878     disable_safe $header
879     check_cpp "$@" <<EOF && enable_safe $header
880 #include <$header>
881 int x;
882 EOF
883 }
884
885 check_func(){
886     log check_func "$@"
887     func=$1
888     shift
889     disable $func
890     check_ld "$@" <<EOF && enable $func
891 extern int $func();
892 int main(void){ $func(); }
893 EOF
894 }
895
896 check_mathfunc(){
897     log check_mathfunc "$@"
898     func=$1
899     narg=$2
900     shift 2
901     test $narg = 2 && args="f, g" || args="f"
902     disable $func
903     check_ld "$@" <<EOF && enable $func
904 #include <math.h>
905 float foo(float f, float g) { return $func($args); }
906 int main(void){ return 0; }
907 EOF
908 }
909
910 check_func_headers(){
911     log check_func_headers "$@"
912     headers=$1
913     funcs=$2
914     shift 2
915     {
916         for hdr in $headers; do
917             print_include $hdr
918         done
919         for func in $funcs; do
920             echo "long check_$func(void) { return (long) $func; }"
921         done
922         echo "int main(void) { return 0; }"
923     } | check_ld "$@" && enable $funcs && enable_safe $headers
924 }
925
926 check_cpp_condition(){
927     log check_cpp_condition "$@"
928     header=$1
929     condition=$2
930     shift 2
931     check_cpp "$@" <<EOF
932 #include <$header>
933 #if !($condition)
934 #error "unsatisfied condition: $condition"
935 #endif
936 EOF
937 }
938
939 check_lib(){
940     log check_lib "$@"
941     header="$1"
942     func="$2"
943     shift 2
944     check_header $header && check_func $func "$@" && add_extralibs "$@"
945 }
946
947 check_lib2(){
948     log check_lib2 "$@"
949     headers="$1"
950     funcs="$2"
951     shift 2
952     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
953 }
954
955 check_pkg_config(){
956     log check_pkg_config "$@"
957     pkg="$1"
958     headers="$2"
959     funcs="$3"
960     shift 3
961     check_cmd $pkg_config --exists --print-errors $pkg || return
962     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
963     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
964     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
965         set_safe "${pkg}_cflags" $pkg_cflags   &&
966         set_safe "${pkg}_libs"   $pkg_libs
967 }
968
969 check_exec(){
970     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
971 }
972
973 check_exec_crash(){
974     code=$(cat)
975
976     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
977     # are safe but may not be available everywhere.  Thus we use
978     # raise(SIGTERM) instead.  The check is run in a subshell so we
979     # can redirect the "Terminated" message from the shell.  SIGBUS
980     # is not defined by standard C so it is used conditionally.
981
982     (check_exec "$@") >> $logfile 2>&1 <<EOF
983 #include <signal.h>
984 static void sighandler(int sig){
985     raise(SIGTERM);
986 }
987 int foo(void){
988     $code
989 }
990 int (*func_ptr)(void) = foo;
991 int main(void){
992     signal(SIGILL, sighandler);
993     signal(SIGFPE, sighandler);
994     signal(SIGSEGV, sighandler);
995 #ifdef SIGBUS
996     signal(SIGBUS, sighandler);
997 #endif
998     return func_ptr();
999 }
1000 EOF
1001 }
1002
1003 check_type(){
1004     log check_type "$@"
1005     headers=$1
1006     type=$2
1007     shift 2
1008     disable_safe "$type"
1009     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1010 }
1011
1012 check_struct(){
1013     log check_struct "$@"
1014     headers=$1
1015     struct=$2
1016     member=$3
1017     shift 3
1018     disable_safe "${struct}_${member}"
1019     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1020         enable_safe "${struct}_${member}"
1021 }
1022
1023 check_builtin(){
1024     log check_builtin "$@"
1025     name=$1
1026     headers=$2
1027     builtin=$3
1028     shift 3
1029     disable "$name"
1030     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1031 }
1032
1033 check_compile_assert(){
1034     log check_compile_assert "$@"
1035     name=$1
1036     headers=$2
1037     condition=$3
1038     shift 3
1039     disable "$name"
1040     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1041 }
1042
1043 require(){
1044     name="$1"
1045     header="$2"
1046     func="$3"
1047     shift 3
1048     check_lib $header $func "$@" || die "ERROR: $name not found"
1049 }
1050
1051 require2(){
1052     name="$1"
1053     headers="$2"
1054     func="$3"
1055     shift 3
1056     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1057 }
1058
1059 require_pkg_config(){
1060     pkg="$1"
1061     check_pkg_config "$@" || die "ERROR: $pkg not found"
1062     add_cflags    $(get_safe "${pkg}_cflags")
1063     add_extralibs $(get_safe "${pkg}_libs")
1064 }
1065
1066 hostcc_e(){
1067     eval printf '%s\\n' $HOSTCC_E
1068 }
1069
1070 hostcc_o(){
1071     eval printf '%s\\n' $HOSTCC_O
1072 }
1073
1074 check_host_cc(){
1075     log check_host_cc "$@"
1076     cat > $TMPC
1077     log_file $TMPC
1078     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1079 }
1080
1081 check_host_cpp(){
1082     log check_host_cpp "$@"
1083     cat > $TMPC
1084     log_file $TMPC
1085     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1086 }
1087
1088 check_host_cppflags(){
1089     log check_host_cppflags "$@"
1090     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1091 int x;
1092 EOF
1093 }
1094
1095 check_host_cflags(){
1096     log check_host_cflags "$@"
1097     set -- $($host_cflags_filter "$@")
1098     check_host_cc "$@" <<EOF && append host_cflags "$@"
1099 int x;
1100 EOF
1101 }
1102
1103 check_host_cpp_condition(){
1104     log check_host_cpp_condition "$@"
1105     header=$1
1106     condition=$2
1107     shift 2
1108     check_host_cpp "$@" <<EOF
1109 #include <$header>
1110 #if !($condition)
1111 #error "unsatisfied condition: $condition"
1112 #endif
1113 EOF
1114 }
1115
1116 apply(){
1117     file=$1
1118     shift
1119     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1120 }
1121
1122 cp_if_changed(){
1123     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1124     mkdir -p "$(dirname $2)"
1125     $cp_f "$1" "$2"
1126 }
1127
1128 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1129 # system-dependent things.
1130
1131 COMPONENT_LIST="
1132     bsfs
1133     decoders
1134     demuxers
1135     encoders
1136     filters
1137     hwaccels
1138     indevs
1139     muxers
1140     outdevs
1141     parsers
1142     protocols
1143 "
1144
1145 EXAMPLE_LIST="
1146     avcodec_example
1147     filter_audio_example
1148     metadata_example
1149     output_example
1150     qsvdec_example
1151     transcode_aac_example
1152 "
1153
1154 EXTERNAL_LIBRARY_LIST="
1155     avisynth
1156     bzlib
1157     frei0r
1158     gnutls
1159     libbs2b
1160     libcdio
1161     libdc1394
1162     libdcadec
1163     libfaac
1164     libfdk_aac
1165     libfontconfig
1166     libfreetype
1167     libgsm
1168     libilbc
1169     libmfx
1170     libmp3lame
1171     libopencore_amrnb
1172     libopencore_amrwb
1173     libopencv
1174     libopenh264
1175     libopenjpeg
1176     libopus
1177     libpulse
1178     librtmp
1179     libschroedinger
1180     libsnappy
1181     libspeex
1182     libtheora
1183     libtwolame
1184     libvo_aacenc
1185     libvo_amrwbenc
1186     libvorbis
1187     libvpx
1188     libwavpack
1189     libwebp
1190     libx264
1191     libx265
1192     libxavs
1193     libxcb
1194     libxcb_shm
1195     libxcb_xfixes
1196     libxvid
1197     mmal
1198     nvenc
1199     openssl
1200     x11grab
1201     zlib
1202 "
1203
1204 FEATURE_LIST="
1205     gray
1206     hardcoded_tables
1207     runtime_cpudetect
1208     safe_bitstream_reader
1209     shared
1210     small
1211     sram
1212     static
1213     swscale_alpha
1214 "
1215
1216 HWACCEL_LIST="
1217     d3d11va
1218     dxva2
1219     vaapi
1220     vda
1221     vdpau
1222 "
1223
1224 LIBRARY_LIST="
1225     avcodec
1226     avdevice
1227     avfilter
1228     avformat
1229     avresample
1230     avutil
1231     swscale
1232 "
1233
1234 LICENSE_LIST="
1235     gpl
1236     nonfree
1237     version3
1238 "
1239
1240 PROGRAM_LIST="
1241     avconv
1242     avplay
1243     avprobe
1244 "
1245
1246 SUBSYSTEM_LIST="
1247     dct
1248     doc
1249     error_resilience
1250     faan
1251     fft
1252     lsp
1253     lzo
1254     mdct
1255     network
1256     rdft
1257 "
1258
1259 CONFIG_LIST="
1260     $COMPONENT_LIST
1261     $EXAMPLE_LIST
1262     $EXTERNAL_LIBRARY_LIST
1263     $FEATURE_LIST
1264     $HWACCEL_LIST
1265     $LICENSE_LIST
1266     $LIBRARY_LIST
1267     $PROGRAM_LIST
1268     $SUBSYSTEM_LIST
1269     memalign_hack
1270     neon_clobber_test
1271     pic
1272     pod2man
1273     texi2html
1274     thumb
1275     valgrind_backtrace
1276     xmm_clobber_test
1277 "
1278
1279 THREADS_LIST="
1280     pthreads
1281     w32threads
1282 "
1283
1284 ATOMICS_LIST="
1285     atomics_gcc
1286     atomics_suncc
1287     atomics_win32
1288 "
1289
1290 ARCH_LIST="
1291     aarch64
1292     alpha
1293     arm
1294     avr32
1295     avr32_ap
1296     avr32_uc
1297     bfin
1298     ia64
1299     m68k
1300     mips
1301     mips64
1302     parisc
1303     ppc
1304     ppc64
1305     s390
1306     sh4
1307     sparc
1308     sparc64
1309     tilegx
1310     tilepro
1311     tomi
1312     x86
1313     x86_32
1314     x86_64
1315 "
1316
1317 ARCH_EXT_LIST_ARM="
1318     armv5te
1319     armv6
1320     armv6t2
1321     armv8
1322     neon
1323     vfp
1324     vfpv3
1325 "
1326
1327 ARCH_EXT_LIST_X86_SIMD="
1328     amd3dnow
1329     amd3dnowext
1330     avx
1331     avx2
1332     fma3
1333     fma4
1334     mmx
1335     mmxext
1336     sse
1337     sse2
1338     sse3
1339     sse4
1340     sse42
1341     ssse3
1342     xop
1343 "
1344
1345 ARCH_EXT_LIST_PPC="
1346     altivec
1347     dcbzl
1348     ldbrx
1349     power8
1350     ppc4xx
1351     vsx
1352 "
1353
1354 ARCH_EXT_LIST_X86="
1355     $ARCH_EXT_LIST_X86_SIMD
1356     cpunop
1357     i686
1358 "
1359
1360 ARCH_EXT_LIST_MIPS="
1361     loongson
1362     mips32r1
1363     mips64r1
1364     mips32r2
1365     mips64r2
1366     mips32r6
1367     mips64r6
1368 "
1369
1370 ARCH_EXT_LIST="
1371     $ARCH_EXT_LIST_ARM
1372     $ARCH_EXT_LIST_MIPS
1373     $ARCH_EXT_LIST_PPC
1374     $ARCH_EXT_LIST_X86
1375     vis
1376 "
1377
1378 ARCH_FEATURES="
1379     aligned_stack
1380     fast_64bit
1381     fast_clz
1382     fast_cmov
1383     local_aligned_8
1384     local_aligned_16
1385     simd_align_16
1386 "
1387
1388 BUILTIN_LIST="
1389     atomic_cas_ptr
1390     machine_rw_barrier
1391     MemoryBarrier
1392     mm_empty
1393     rdtsc
1394     sync_val_compare_and_swap
1395 "
1396 HAVE_LIST_CMDLINE="
1397     inline_asm
1398     symver
1399     yasm
1400 "
1401
1402 HAVE_LIST_PUB="
1403     bigendian
1404     fast_unaligned
1405 "
1406
1407 HEADERS_LIST="
1408     alsa_asoundlib_h
1409     altivec_h
1410     arpa_inet_h
1411     cdio_paranoia_h
1412     cdio_paranoia_paranoia_h
1413     dev_bktr_ioctl_bt848_h
1414     dev_bktr_ioctl_meteor_h
1415     dev_ic_bt8xx_h
1416     dev_video_bktr_ioctl_bt848_h
1417     dev_video_meteor_ioctl_meteor_h
1418     direct_h
1419     dlfcn_h
1420     d3d11_h
1421     dxva_h
1422     gsm_h
1423     io_h
1424     mach_mach_time_h
1425     machine_ioctl_bt848_h
1426     machine_ioctl_meteor_h
1427     malloc_h
1428     poll_h
1429     sndio_h
1430     soundcard_h
1431     sys_mman_h
1432     sys_param_h
1433     sys_resource_h
1434     sys_select_h
1435     sys_soundcard_h
1436     sys_time_h
1437     sys_un_h
1438     sys_videoio_h
1439     unistd_h
1440     valgrind_valgrind_h
1441     windows_h
1442     winsock2_h
1443 "
1444
1445 INTRINSICS_LIST="
1446     intrinsics_neon
1447 "
1448
1449 MATH_FUNCS="
1450     atanf
1451     atan2f
1452     cbrtf
1453     cosf
1454     exp2
1455     exp2f
1456     expf
1457     isinf
1458     isnan
1459     ldexpf
1460     llrint
1461     llrintf
1462     log2
1463     log2f
1464     log10f
1465     lrint
1466     lrintf
1467     powf
1468     rint
1469     round
1470     roundf
1471     sinf
1472     trunc
1473     truncf
1474 "
1475
1476 SYSTEM_FUNCS="
1477     aligned_malloc
1478     clock_gettime
1479     closesocket
1480     CommandLineToArgvW
1481     CoTaskMemFree
1482     CryptGenRandom
1483     dlopen
1484     fcntl
1485     flt_lim
1486     fork
1487     getaddrinfo
1488     gethrtime
1489     getopt
1490     GetProcessAffinityMask
1491     GetProcessMemoryInfo
1492     GetProcessTimes
1493     getrusage
1494     getservbyport
1495     GetSystemTimeAsFileTime
1496     gettimeofday
1497     gmtime_r
1498     inet_aton
1499     isatty
1500     jack_port_get_latency_range
1501     LoadLibrary
1502     localtime_r
1503     mach_absolute_time
1504     MapViewOfFile
1505     memalign
1506     mkstemp
1507     mmap
1508     mprotect
1509     nanosleep
1510     posix_memalign
1511     sched_getaffinity
1512     SetConsoleTextAttribute
1513     setmode
1514     setrlimit
1515     Sleep
1516     strerror_r
1517     sysconf
1518     sysctl
1519     usleep
1520     VirtualAlloc
1521 "
1522
1523 TOOLCHAIN_FEATURES="
1524     as_dn_directive
1525     as_func
1526     as_object_arch
1527     asm_mod_q
1528     attribute_may_alias
1529     attribute_packed
1530     ebp_available
1531     ebx_available
1532     gnu_as
1533     ibm_asm
1534     inline_asm_labels
1535     pragma_deprecated
1536     symver_asm_label
1537     symver_gnu_asm
1538     vfp_args
1539     xform_asm
1540     xmm_clobbers
1541 "
1542
1543 TYPES_LIST="
1544     CONDITION_VARIABLE_Ptr
1545     socklen_t
1546     struct_addrinfo
1547     struct_group_source_req
1548     struct_ip_mreq_source
1549     struct_ipv6_mreq
1550     struct_pollfd
1551     struct_rusage_ru_maxrss
1552     struct_sockaddr_in6
1553     struct_sockaddr_sa_len
1554     struct_sockaddr_storage
1555     struct_v4l2_frmivalenum_discrete
1556 "
1557
1558 HAVE_LIST="
1559     $ARCH_EXT_LIST
1560     $(add_suffix _external $ARCH_EXT_LIST)
1561     $(add_suffix _inline   $ARCH_EXT_LIST)
1562     $ARCH_FEATURES
1563     $ATOMICS_LIST
1564     $BUILTIN_LIST
1565     $HAVE_LIST_CMDLINE
1566     $HAVE_LIST_PUB
1567     $HEADERS_LIST
1568     $INTRINSICS_LIST
1569     $MATH_FUNCS
1570     $SYSTEM_FUNCS
1571     $THREADS_LIST
1572     $TOOLCHAIN_FEATURES
1573     $TYPES_LIST
1574     atomics_native
1575     dos_paths
1576     dxva2_lib
1577     libc_msvcrt
1578     libdc1394_1
1579     libdc1394_2
1580     sdl
1581     section_data_rel_ro
1582     threads
1583     vaapi_x11
1584     vdpau_x11
1585     xlib
1586 "
1587
1588 # options emitted with CONFIG_ prefix but not available on the command line
1589 CONFIG_EXTRA="
1590     aandcttables
1591     ac3dsp
1592     audio_frame_queue
1593     audiodsp
1594     blockdsp
1595     bswapdsp
1596     cabac
1597     dvprofile
1598     faandct
1599     faanidct
1600     fdctdsp
1601     flacdsp
1602     fmtconvert
1603     g722dsp
1604     gcrypt
1605     gmp
1606     golomb
1607     gplv3
1608     h263dsp
1609     h264chroma
1610     h264dsp
1611     h264pred
1612     h264qpel
1613     hpeldsp
1614     huffman
1615     huffyuvdsp
1616     huffyuvencdsp
1617     idctdsp
1618     iirfilter
1619     imdct15
1620     intrax8
1621     ividsp
1622     jpegtables
1623     libx262
1624     lgplv3
1625     lpc
1626     lzf
1627     me_cmp
1628     mpeg_er
1629     mpegaudio
1630     mpegaudiodsp
1631     mpegvideo
1632     mpegvideoenc
1633     mss34dsp
1634     pixblockdsp
1635     qpeldsp
1636     qsv
1637     qsvdec
1638     qsvenc
1639     rangecoder
1640     riffdec
1641     riffenc
1642     rtpdec
1643     rtpenc_chain
1644     rv34dsp
1645     sinewin
1646     snappy
1647     startcode
1648     texturedsp
1649     texturedspenc
1650     tpeldsp
1651     videodsp
1652     vp3dsp
1653     vp56dsp
1654     vp8dsp
1655     wma_freqs
1656     wmv2dsp
1657 "
1658
1659 CMDLINE_SELECT="
1660     $ARCH_EXT_LIST
1661     $CONFIG_LIST
1662     $HAVE_LIST_CMDLINE
1663     $THREADS_LIST
1664     asm
1665     cross_compile
1666     debug
1667     extra_warnings
1668     logging
1669     lto
1670     optimizations
1671     rpath
1672 "
1673
1674 PATHS_LIST="
1675     bindir
1676     datadir
1677     docdir
1678     incdir
1679     libdir
1680     mandir
1681     prefix
1682     shlibdir
1683 "
1684
1685 CMDLINE_SET="
1686     $PATHS_LIST
1687     ar
1688     arch
1689     as
1690     build_suffix
1691     cc
1692     cpu
1693     cross_prefix
1694     dep_cc
1695     env
1696     extra_version
1697     host_cc
1698     host_cflags
1699     host_ld
1700     host_ldflags
1701     host_libs
1702     host_os
1703     ld
1704     logfile
1705     malloc_prefix
1706     nm
1707     optflags
1708     pkg_config
1709     pkg_config_flags
1710     random_seed
1711     samples
1712     sysinclude
1713     sysroot
1714     target_exec
1715     target_os
1716     target_path
1717     target_samples
1718     toolchain
1719 "
1720
1721 CMDLINE_APPEND="
1722     extra_cflags
1723     host_cppflags
1724 "
1725
1726 # code dependency declarations
1727
1728 # architecture extensions
1729
1730 armv5te_deps="arm"
1731 armv6_deps="arm"
1732 armv6t2_deps="arm"
1733 armv8_deps="aarch64"
1734 neon_deps_any="aarch64 arm"
1735 intrinsics_neon_deps="neon"
1736 vfp_deps_any="aarch64 arm"
1737 vfpv3_deps="vfp"
1738
1739 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1740
1741 altivec_deps="ppc"
1742 ppc4xx_deps="ppc"
1743 vsx_deps="altivec"
1744 power8_deps="vsx"
1745
1746 cpunop_deps="i686"
1747 x86_64_select="i686"
1748 x86_64_suggest="fast_cmov"
1749
1750 amd3dnow_deps="mmx"
1751 amd3dnowext_deps="amd3dnow"
1752 i686_deps="x86"
1753 mmx_deps="x86"
1754 mmxext_deps="mmx"
1755 sse_deps="mmxext"
1756 sse2_deps="sse"
1757 sse3_deps="sse2"
1758 ssse3_deps="sse3"
1759 sse4_deps="ssse3"
1760 sse42_deps="sse4"
1761 avx_deps="sse42"
1762 xop_deps="avx"
1763 fma3_deps="avx"
1764 fma4_deps="avx"
1765 avx2_deps="avx"
1766
1767 mmx_external_deps="yasm"
1768 mmx_inline_deps="inline_asm"
1769 mmx_suggest="mmx_external mmx_inline"
1770
1771 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1772     eval dep=\$${ext}_deps
1773     eval ${ext}_external_deps='"${dep}_external"'
1774     eval ${ext}_inline_deps='"${dep}_inline"'
1775     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1776 done
1777
1778 aligned_stack_if_any="aarch64 ppc x86"
1779 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1780 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1781 fast_unaligned_if_any="aarch64 ppc x86"
1782 simd_align_16_if_any="altivec neon sse"
1783
1784 # system capabilities
1785 symver_if_any="symver_asm_label symver_gnu_asm"
1786 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1787
1788 # threading support
1789 atomics_gcc_if="sync_val_compare_and_swap"
1790 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1791 atomics_win32_if="MemoryBarrier"
1792 atomics_native_if_any="$ATOMICS_LIST"
1793 w32threads_deps="atomics_native"
1794 threads_if_any="$THREADS_LIST"
1795
1796 # subsystems
1797 dct_select="rdft"
1798 error_resilience_select="me_cmp"
1799 faandct_deps="faan fdctdsp"
1800 faanidct_deps="faan idctdsp"
1801 intrax8_select="error_resilience"
1802 mdct_select="fft"
1803 rdft_select="fft"
1804 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1805 mpeg_er_select="error_resilience"
1806 mpegaudio_select="mpegaudiodsp"
1807 mpegaudiodsp_select="dct"
1808 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1809 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1810 nvenc_deps_any="dlopen LoadLibrary"
1811 nvenc_extralibs='$ldl'
1812 qsvdec_select="qsv"
1813 qsvenc_select="qsv"
1814
1815 # decoders / encoders
1816 aac_decoder_select="imdct15 mdct sinewin"
1817 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1818 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1819 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1820 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1821 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1822 adpcm_g722_decoder_select="g722dsp"
1823 adpcm_g722_encoder_select="g722dsp"
1824 aic_decoder_select="golomb idctdsp"
1825 alac_encoder_select="lpc"
1826 als_decoder_select="bswapdsp"
1827 amrnb_decoder_select="lsp"
1828 amrwb_decoder_select="lsp"
1829 amv_decoder_select="sp5x_decoder"
1830 ape_decoder_select="bswapdsp"
1831 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1832 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1833 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1834 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1835 atrac1_decoder_select="mdct sinewin"
1836 atrac3_decoder_select="mdct"
1837 atrac3p_decoder_select="mdct sinewin"
1838 bink_decoder_select="blockdsp hpeldsp"
1839 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1840 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1841 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1842 cllc_decoder_select="bswapdsp"
1843 comfortnoise_encoder_select="lpc"
1844 cook_decoder_select="audiodsp mdct sinewin"
1845 cscd_decoder_select="lzo"
1846 cscd_decoder_suggest="zlib"
1847 dca_decoder_select="fmtconvert mdct"
1848 dds_decoder_select="texturedsp"
1849 dnxhd_decoder_select="blockdsp idctdsp"
1850 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1851 dvvideo_decoder_select="dvprofile idctdsp"
1852 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1853 dxa_decoder_deps="zlib"
1854 dxv_decoder_select="lzf texturedsp"
1855 eac3_decoder_select="ac3_decoder"
1856 eac3_encoder_select="ac3_encoder"
1857 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1858 eatgq_decoder_select="aandcttables idctdsp"
1859 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
1860 exr_decoder_deps="zlib"
1861 ffv1_decoder_select="golomb rangecoder"
1862 ffv1_encoder_select="rangecoder"
1863 ffvhuff_decoder_select="huffyuv_decoder"
1864 ffvhuff_encoder_select="huffyuv_encoder"
1865 fic_decoder_select="golomb"
1866 flac_decoder_select="flacdsp golomb"
1867 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1868 flashsv_decoder_deps="zlib"
1869 flashsv_encoder_deps="zlib"
1870 flashsv2_decoder_deps="zlib"
1871 flv_decoder_select="h263_decoder"
1872 flv_encoder_select="h263_encoder"
1873 fourxm_decoder_select="blockdsp bswapdsp"
1874 fraps_decoder_select="bswapdsp huffman"
1875 g2m_decoder_deps="zlib"
1876 g2m_decoder_select="blockdsp idctdsp jpegtables"
1877 h261_decoder_select="mpeg_er mpegvideo"
1878 h261_encoder_select="aandcttables mpegvideoenc"
1879 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1880 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1881 h263i_decoder_select="h263_decoder"
1882 h263p_encoder_select="h263_encoder"
1883 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1884 h264_decoder_suggest="error_resilience"
1885 h264_nvenc_encoder_deps="nvenc"
1886 h264_qsv_decoder_deps="libmfx"
1887 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1888 h264_qsv_encoder_deps="libmfx"
1889 h264_qsv_encoder_select="qsvenc"
1890 hap_decoder_select="snappy texturedsp"
1891 hap_encoder_deps="libsnappy"
1892 hap_encoder_select="texturedspenc"
1893 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1894 hevc_nvenc_encoder_deps="nvenc"
1895 hevc_qsv_encoder_deps="libmfx"
1896 hevc_qsv_decoder_deps="libmfx"
1897 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1898 hevc_qsv_encoder_select="qsvenc"
1899 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1900 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1901 iac_decoder_select="imc_decoder"
1902 imc_decoder_select="bswapdsp fft mdct sinewin"
1903 indeo3_decoder_select="hpeldsp"
1904 indeo4_decoder_select="ividsp"
1905 indeo5_decoder_select="ividsp"
1906 interplay_video_decoder_select="hpeldsp"
1907 jpegls_decoder_select="golomb mjpeg_decoder"
1908 jpegls_encoder_select="golomb"
1909 jv_decoder_select="blockdsp"
1910 lagarith_decoder_select="huffyuvdsp"
1911 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1912 loco_decoder_select="golomb"
1913 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1914 metasound_decoder_select="lsp mdct sinewin"
1915 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1916 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1917 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1918 mjpegb_decoder_select="mjpeg_decoder"
1919 mlp_decoder_select="mlp_parser"
1920 motionpixels_decoder_select="bswapdsp"
1921 mp1_decoder_select="mpegaudio"
1922 mp1float_decoder_select="mpegaudio"
1923 mp2_decoder_select="mpegaudio"
1924 mp2float_decoder_select="mpegaudio"
1925 mp3_decoder_select="mpegaudio"
1926 mp3adu_decoder_select="mpegaudio"
1927 mp3adufloat_decoder_select="mpegaudio"
1928 mp3float_decoder_select="mpegaudio"
1929 mp3on4_decoder_select="mpegaudio"
1930 mp3on4float_decoder_select="mpegaudio"
1931 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1932 mpc8_decoder_select="mpegaudiodsp"
1933 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1934 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1935 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
1936 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1937 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
1938 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1939 mpeg2_qsv_decoder_deps="libmfx"
1940 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
1941 mpeg2_qsv_encoder_deps="libmfx"
1942 mpeg2_qsv_encoder_select="qsvenc"
1943 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1944 mpeg4_encoder_select="h263_encoder"
1945 msa1_decoder_select="mss34dsp"
1946 msmpeg4v1_decoder_select="h263_decoder"
1947 msmpeg4v2_decoder_select="h263_decoder"
1948 msmpeg4v2_encoder_select="h263_encoder"
1949 msmpeg4v3_decoder_select="h263_decoder"
1950 msmpeg4v3_encoder_select="h263_encoder"
1951 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
1952 mts2_decoder_select="mss34dsp"
1953 mxpeg_decoder_select="mjpeg_decoder"
1954 nellymoser_decoder_select="mdct sinewin"
1955 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1956 nuv_decoder_select="idctdsp lzo"
1957 on2avc_decoder_select="mdct"
1958 opus_decoder_deps="avresample"
1959 opus_decoder_select="imdct15"
1960 png_decoder_deps="zlib"
1961 png_encoder_deps="zlib"
1962 png_encoder_select="huffyuvencdsp"
1963 prores_decoder_select="idctdsp"
1964 prores_encoder_select="fdctdsp"
1965 qcelp_decoder_select="lsp"
1966 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1967 ra_144_encoder_select="audio_frame_queue lpc"
1968 ralf_decoder_select="golomb"
1969 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
1970 rv10_encoder_select="h263_encoder"
1971 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
1972 rv20_encoder_select="h263_encoder"
1973 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
1974 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
1975 screenpresso_decoder_deps="zlib"
1976 shorten_decoder_select="golomb"
1977 sipr_decoder_select="lsp"
1978 sp5x_decoder_select="mjpeg_decoder"
1979 svq1_decoder_select="hpeldsp"
1980 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
1981 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
1982 svq3_decoder_suggest="zlib"
1983 tak_decoder_select="audiodsp"
1984 tdsc_decoder_deps="zlib"
1985 tdsc_decoder_select="mjpeg_decoder"
1986 theora_decoder_select="vp3_decoder"
1987 thp_decoder_select="mjpeg_decoder"
1988 tiff_decoder_suggest="zlib"
1989 tiff_encoder_suggest="zlib"
1990 truehd_decoder_select="mlp_decoder"
1991 truemotion2_decoder_select="bswapdsp"
1992 truespeech_decoder_select="bswapdsp"
1993 tscc_decoder_deps="zlib"
1994 txd_decoder_select="texturedsp"
1995 twinvq_decoder_select="mdct lsp sinewin"
1996 utvideo_decoder_select="bswapdsp"
1997 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
1998 vble_decoder_select="huffyuvdsp"
1999 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
2000 vc1image_decoder_select="vc1_decoder"
2001 vorbis_decoder_select="mdct"
2002 vorbis_encoder_select="mdct"
2003 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2004 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2005 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2006 vp6a_decoder_select="vp6_decoder"
2007 vp6f_decoder_select="vp6_decoder"
2008 vp7_decoder_select="h264pred videodsp vp8dsp"
2009 vp8_decoder_select="h264pred videodsp vp8dsp"
2010 vp9_decoder_select="videodsp"
2011 webp_decoder_select="vp8_decoder"
2012 wmapro_decoder_select="mdct sinewin wma_freqs"
2013 wmav1_decoder_select="mdct sinewin wma_freqs"
2014 wmav1_encoder_select="mdct sinewin wma_freqs"
2015 wmav2_decoder_select="mdct sinewin wma_freqs"
2016 wmav2_encoder_select="mdct sinewin wma_freqs"
2017 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2018 wmv1_decoder_select="h263_decoder"
2019 wmv1_encoder_select="h263_encoder"
2020 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2021 wmv2_encoder_select="h263_encoder wmv2dsp"
2022 wmv3_decoder_select="vc1_decoder"
2023 wmv3image_decoder_select="wmv3_decoder"
2024 zerocodec_decoder_deps="zlib"
2025 zlib_decoder_deps="zlib"
2026 zlib_encoder_deps="zlib"
2027 zmbv_decoder_deps="zlib"
2028 zmbv_encoder_deps="zlib"
2029
2030 # hardware accelerators
2031 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2032 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2033 vaapi_deps="va_va_h"
2034 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2035 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2036 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2037
2038 h263_vaapi_hwaccel_deps="vaapi"
2039 h263_vaapi_hwaccel_select="h263_decoder"
2040 h263_vdpau_hwaccel_deps="vdpau"
2041 h263_vdpau_hwaccel_select="h263_decoder"
2042 h264_d3d11va_hwaccel_deps="d3d11va"
2043 h264_d3d11va_hwaccel_select="h264_decoder"
2044 h264_dxva2_hwaccel_deps="dxva2"
2045 h264_dxva2_hwaccel_select="h264_decoder"
2046 h264_mmal_decoder_deps="mmal"
2047 h264_mmal_hwaccel_deps="mmal"
2048 h264_mmal_decoder_select="h264_decoder"
2049 h264_mmal_encoder_deps="mmal"
2050 h264_qsv_hwaccel_deps="libmfx"
2051 h264_vaapi_hwaccel_deps="vaapi"
2052 h264_vaapi_hwaccel_select="h264_decoder"
2053 h264_vda_hwaccel_deps="vda"
2054 h264_vda_hwaccel_select="h264_decoder"
2055 h264_vda_old_hwaccel_deps="vda"
2056 h264_vda_old_hwaccel_select="h264_decoder"
2057 h264_vdpau_hwaccel_deps="vdpau"
2058 h264_vdpau_hwaccel_select="h264_decoder"
2059 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2060 hevc_d3d11va_hwaccel_select="hevc_decoder"
2061 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2062 hevc_dxva2_hwaccel_select="hevc_decoder"
2063 hevc_qsv_hwaccel_deps="libmfx"
2064 mpeg1_vdpau_hwaccel_deps="vdpau"
2065 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2066 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2067 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2068 mpeg2_dxva2_hwaccel_deps="dxva2"
2069 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2070 mpeg2_qsv_hwaccel_deps="libmfx"
2071 mpeg2_vaapi_hwaccel_deps="vaapi"
2072 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2073 mpeg2_vdpau_hwaccel_deps="vdpau"
2074 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2075 mpeg4_vaapi_hwaccel_deps="vaapi"
2076 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2077 mpeg4_vdpau_hwaccel_deps="vdpau"
2078 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2079 vc1_d3d11va_hwaccel_deps="d3d11va"
2080 vc1_d3d11va_hwaccel_select="vc1_decoder"
2081 vc1_dxva2_hwaccel_deps="dxva2"
2082 vc1_dxva2_hwaccel_select="vc1_decoder"
2083 vc1_vaapi_hwaccel_deps="vaapi"
2084 vc1_vaapi_hwaccel_select="vc1_decoder"
2085 vc1_vdpau_hwaccel_deps="vdpau"
2086 vc1_vdpau_hwaccel_select="vc1_decoder"
2087 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2088 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2089 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2090 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2091
2092 # parsers
2093 h264_parser_select="h264_decoder"
2094 hevc_parser_select="golomb"
2095 mpegvideo_parser_select="mpegvideo"
2096 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2097 vc1_parser_select="mpegvideo startcode vc1_decoder"
2098
2099 # bitstream_filters
2100 mjpeg2jpeg_bsf_select="jpegtables"
2101
2102 # external libraries
2103 libdcadec_decoder_deps="libdcadec"
2104 libfaac_encoder_deps="libfaac"
2105 libfaac_encoder_select="audio_frame_queue"
2106 libfdk_aac_decoder_deps="libfdk_aac"
2107 libfdk_aac_encoder_deps="libfdk_aac"
2108 libfdk_aac_encoder_select="audio_frame_queue"
2109 libgsm_decoder_deps="libgsm"
2110 libgsm_encoder_deps="libgsm"
2111 libgsm_ms_decoder_deps="libgsm"
2112 libgsm_ms_encoder_deps="libgsm"
2113 libilbc_decoder_deps="libilbc"
2114 libilbc_encoder_deps="libilbc"
2115 libmp3lame_encoder_deps="libmp3lame"
2116 libmp3lame_encoder_select="audio_frame_queue"
2117 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2118 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2119 libopencore_amrnb_encoder_select="audio_frame_queue"
2120 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2121 libopenh264_encoder_deps="libopenh264"
2122 libopenjpeg_decoder_deps="libopenjpeg"
2123 libopenjpeg_encoder_deps="libopenjpeg"
2124 libopus_decoder_deps="libopus"
2125 libopus_encoder_deps="libopus"
2126 libopus_encoder_select="audio_frame_queue"
2127 libschroedinger_decoder_deps="libschroedinger"
2128 libschroedinger_encoder_deps="libschroedinger"
2129 libspeex_decoder_deps="libspeex"
2130 libspeex_encoder_deps="libspeex"
2131 libspeex_encoder_select="audio_frame_queue"
2132 libtheora_encoder_deps="libtheora"
2133 libtwolame_encoder_deps="libtwolame"
2134 libvo_aacenc_encoder_deps="libvo_aacenc"
2135 libvo_aacenc_encoder_select="audio_frame_queue"
2136 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2137 libvorbis_encoder_deps="libvorbis"
2138 libvorbis_encoder_select="audio_frame_queue"
2139 libvpx_vp8_decoder_deps="libvpx"
2140 libvpx_vp8_encoder_deps="libvpx"
2141 libvpx_vp9_decoder_deps="libvpx"
2142 libvpx_vp9_encoder_deps="libvpx"
2143 libwavpack_encoder_deps="libwavpack"
2144 libwebp_encoder_deps="libwebp"
2145 libx262_encoder_deps="libx262"
2146 libx264_encoder_deps="libx264"
2147 libx265_encoder_deps="libx265"
2148 libxavs_encoder_deps="libxavs"
2149 libxvid_encoder_deps="libxvid"
2150
2151 # demuxers / muxers
2152 ac3_demuxer_select="ac3_parser"
2153 asf_demuxer_select="riffdec"
2154 asf_muxer_select="riffenc"
2155 asf_stream_muxer_select="asf_muxer"
2156 avi_demuxer_select="riffdec"
2157 avi_muxer_select="riffenc"
2158 avisynth_demuxer_deps="avisynth"
2159 avisynth_demuxer_select="riffdec"
2160 caf_demuxer_select="riffdec"
2161 dash_muxer_select="mp4_muxer"
2162 dirac_demuxer_select="dirac_parser"
2163 dv_demuxer_select="dvprofile"
2164 dv_muxer_select="dvprofile"
2165 dxa_demuxer_select="riffdec"
2166 eac3_demuxer_select="ac3_parser"
2167 f4v_muxer_select="mov_muxer"
2168 flac_demuxer_select="flac_parser"
2169 hds_muxer_select="flv_muxer"
2170 hls_muxer_select="mpegts_muxer"
2171 ipod_muxer_select="mov_muxer"
2172 ismv_muxer_select="mov_muxer"
2173 matroska_audio_muxer_select="matroska_muxer"
2174 matroska_demuxer_select="riffdec"
2175 matroska_demuxer_suggest="bzlib lzo zlib"
2176 matroska_muxer_select="riffenc"
2177 mmf_muxer_select="riffenc"
2178 mov_demuxer_select="riffdec"
2179 mov_demuxer_suggest="zlib"
2180 mov_muxer_select="riffenc rtpenc_chain"
2181 mp3_demuxer_select="mpegaudio_parser"
2182 mp4_muxer_select="mov_muxer"
2183 mpegts_muxer_select="adts_muxer latm_muxer"
2184 mpegtsraw_demuxer_select="mpegts_demuxer"
2185 mxf_d10_muxer_select="mxf_muxer"
2186 nut_muxer_select="riffenc"
2187 nuv_demuxer_select="riffdec"
2188 oga_muxer_select="ogg_muxer"
2189 ogg_demuxer_select="golomb"
2190 opus_muxer_select="ogg_muxer"
2191 psp_muxer_select="mov_muxer"
2192 rtp_demuxer_select="sdp_demuxer"
2193 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2194 rtsp_demuxer_select="http_protocol rtpdec"
2195 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2196 sap_demuxer_select="sdp_demuxer"
2197 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2198 sdp_demuxer_select="rtpdec"
2199 smoothstreaming_muxer_select="ismv_muxer"
2200 spdif_muxer_select="aac_parser"
2201 spx_muxer_select="ogg_muxer"
2202 tak_demuxer_select="tak_parser"
2203 tg2_muxer_select="mov_muxer"
2204 tgp_muxer_select="mov_muxer"
2205 w64_demuxer_select="wav_demuxer"
2206 wav_demuxer_select="riffdec"
2207 wav_muxer_select="riffenc"
2208 webm_muxer_select="riffenc"
2209 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2210 wtv_demuxer_select="riffdec"
2211 xmv_demuxer_select="riffdec"
2212 xwma_demuxer_select="riffdec"
2213
2214 # indevs / outdevs
2215 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2216 alsa_outdev_deps="alsa_asoundlib_h"
2217 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2218 dv1394_indev_deps="dv1394"
2219 dv1394_indev_select="dv_demuxer"
2220 fbdev_indev_deps="linux_fb_h"
2221 jack_indev_deps="jack_jack_h pthreads"
2222 libcdio_indev_deps="libcdio"
2223 libdc1394_indev_deps="libdc1394"
2224 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2225 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2226 pulse_indev_deps="libpulse"
2227 sndio_indev_deps="sndio_h"
2228 sndio_outdev_deps="sndio_h"
2229 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2230 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2231 vfwcap_indev_extralibs="-lavicap32"
2232 x11grab_indev_deps="x11grab"
2233 x11grab_xcb_indev_deps="libxcb"
2234
2235 # protocols
2236 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2237 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2238 ffrtmpcrypt_protocol_select="tcp_protocol"
2239 ffrtmphttp_protocol_deps="!librtmp_protocol"
2240 ffrtmphttp_protocol_select="http_protocol"
2241 gopher_protocol_select="network"
2242 http_protocol_select="tcp_protocol"
2243 httpproxy_protocol_select="tcp_protocol"
2244 https_protocol_select="tls_protocol"
2245 icecast_protocol_select="http_protocol"
2246 librtmp_protocol_deps="librtmp"
2247 librtmpe_protocol_deps="librtmp"
2248 librtmps_protocol_deps="librtmp"
2249 librtmpt_protocol_deps="librtmp"
2250 librtmpte_protocol_deps="librtmp"
2251 mmsh_protocol_select="http_protocol"
2252 mmst_protocol_select="network"
2253 rtmp_protocol_deps="!librtmp_protocol"
2254 rtmp_protocol_select="tcp_protocol"
2255 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2256 rtmps_protocol_deps="!librtmp_protocol"
2257 rtmps_protocol_select="tls_protocol"
2258 rtmpt_protocol_select="ffrtmphttp_protocol"
2259 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2260 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2261 rtp_protocol_select="udp_protocol"
2262 sctp_protocol_deps="struct_sctp_event_subscribe"
2263 sctp_protocol_select="network"
2264 srtp_protocol_select="rtp_protocol"
2265 tcp_protocol_select="network"
2266 tls_gnutls_protocol_deps="gnutls"
2267 tls_gnutls_protocol_select="tcp_protocol"
2268 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2269 tls_openssl_protocol_select="tcp_protocol"
2270 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2271 udp_protocol_select="network"
2272 unix_protocol_deps="sys_un_h"
2273 unix_protocol_select="network"
2274
2275 # filters
2276 blackframe_filter_deps="gpl"
2277 boxblur_filter_deps="gpl"
2278 bs2b_filter_deps="libbs2b"
2279 cropdetect_filter_deps="gpl"
2280 delogo_filter_deps="gpl"
2281 drawtext_filter_deps="libfreetype"
2282 frei0r_filter_deps="frei0r dlopen"
2283 frei0r_filter_extralibs='$ldl'
2284 frei0r_src_filter_deps="frei0r dlopen"
2285 frei0r_src_filter_extralibs='$ldl'
2286 hqdn3d_filter_deps="gpl"
2287 interlace_filter_deps="gpl"
2288 ocv_filter_deps="libopencv"
2289 resample_filter_deps="avresample"
2290 scale_filter_deps="swscale"
2291
2292 # examples
2293 avcodec_example_deps="avcodec avutil"
2294 filter_audio_example_deps="avfilter avutil"
2295 metadata_example_deps="avformat avutil"
2296 output_example_deps="avcodec avformat avutil swscale"
2297 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2298 transcode_aac_example_deps="avcodec avformat avresample"
2299
2300 # libraries, in linking order
2301 avcodec_deps="avutil"
2302 avdevice_deps="avformat avcodec avutil"
2303 avfilter_deps="avutil"
2304 avformat_deps="avcodec avutil"
2305 avresample_deps="avutil"
2306 swscale_deps="avutil"
2307
2308 # programs
2309 avconv_deps="avcodec avfilter avformat avresample swscale"
2310 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2311                fps_filter null_filter resample_filter scale_filter
2312                setpts_filter trim_filter"
2313 avplay_deps="avcodec avformat avresample swscale sdl"
2314 avplay_libs='$sdl_libs'
2315 avplay_select="rdft transpose_filter hflip_filter vflip_filter"
2316 avprobe_deps="avcodec avformat"
2317
2318 # documentation
2319 pod2man_deps="doc"
2320 texi2html_deps="doc"
2321
2322 # default parameters
2323
2324 logfile="config.log"
2325
2326 # installation paths
2327 prefix_default="/usr/local"
2328 bindir_default='${prefix}/bin'
2329 datadir_default='${prefix}/share/avconv'
2330 docdir_default='${prefix}/share/doc/libav'
2331 incdir_default='${prefix}/include'
2332 libdir_default='${prefix}/lib'
2333 mandir_default='${prefix}/share/man'
2334 shlibdir_default="$libdir_default"
2335
2336 # toolchain
2337 ar_default="ar"
2338 cc_default="gcc"
2339 host_cc_default="gcc"
2340 cp_f="cp -f"
2341 ln_s="ln -s -f"
2342 nm_default="nm -g"
2343 objformat="elf"
2344 pkg_config_default=pkg-config
2345 ranlib="ranlib"
2346 strip="strip"
2347 yasmexe="yasm"
2348
2349 # machine
2350 arch_default=$(uname -m)
2351 cpu="generic"
2352 intrinsics="none"
2353
2354 # OS
2355 target_os_default=$(tolower $(uname -s))
2356 host_os=$target_os_default
2357
2358 # configurable options
2359 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2360
2361 enable asm
2362 enable debug
2363 enable doc
2364 enable faan faandct faanidct
2365 enable optimizations
2366 enable safe_bitstream_reader
2367 enable static
2368 enable swscale_alpha
2369 enable valgrind_backtrace
2370
2371 # By default, enable only those hwaccels that have no external dependencies.
2372 enable d3d11va dxva2 vda vdpau
2373
2374 # build settings
2375 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2376 LIBPREF="lib"
2377 LIBSUF=".a"
2378 FULLNAME='$(NAME)$(BUILDSUF)'
2379 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2380 SLIBPREF="lib"
2381 SLIBSUF=".so"
2382 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2383 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2384 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2385 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2386 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2387 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2388
2389 asflags_filter=echo
2390 cflags_filter=echo
2391 ldflags_filter=echo
2392
2393 AS_C='-c'
2394 AS_O='-o $@'
2395 CC_C='-c'
2396 CC_E='-E -o $@'
2397 CC_O='-o $@'
2398 LD_O='-o $@'
2399 LD_LIB='-l%'
2400 LD_PATH='-L'
2401 HOSTCC_C='-c'
2402 HOSTCC_E='-E -o $@'
2403 HOSTCC_O='-o $@'
2404 HOSTLD_O='-o $@'
2405
2406 host_libs='-lm'
2407 host_cflags_filter=echo
2408 host_ldflags_filter=echo
2409
2410 target_path='$(CURDIR)'
2411
2412 # since the object filename is not given with the -MM flag, the compiler
2413 # is only able to print the basename, and we must add the path ourselves
2414 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2415 DEPFLAGS='-MM'
2416
2417 # find source path
2418 if test -f configure; then
2419     source_path=.
2420 else
2421     source_path=$(cd $(dirname "$0"); pwd)
2422     echo "$source_path" | grep -q '[[:blank:]]' &&
2423         die "Out of tree builds are impossible with whitespace in source path."
2424     test -e "$source_path/config.h" &&
2425         die "Out of tree builds are impossible with config.h in source dir."
2426 fi
2427
2428 for v in "$@"; do
2429     r=${v#*=}
2430     l=${v%"$r"}
2431     r=$(sh_quote "$r")
2432     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2433 done
2434
2435 find_things(){
2436     thing=$1
2437     pattern=$2
2438     file=$source_path/$3
2439     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2440 }
2441
2442 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2443 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2444 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2445 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2446 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2447 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2448 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2449 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2450 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2451 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2452 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2453
2454 ALL_COMPONENTS="
2455     $BSF_LIST
2456     $DECODER_LIST
2457     $DEMUXER_LIST
2458     $ENCODER_LIST
2459     $FILTER_LIST
2460     $HWACCEL_LIST
2461     $INDEV_LIST
2462     $MUXER_LIST
2463     $OUTDEV_LIST
2464     $PARSER_LIST
2465     $PROTOCOL_LIST
2466 "
2467
2468 for n in $COMPONENT_LIST; do
2469     v=$(toupper ${n%s})_LIST
2470     eval enable \$$v
2471     eval ${n}_if_any="\$$v"
2472 done
2473
2474 enable $ARCH_EXT_LIST
2475
2476 die_unknown(){
2477     echo "Unknown option \"$1\"."
2478     echo "See $0 --help for available options."
2479     exit 1
2480 }
2481
2482 print_3_columns() {
2483     cat | tr ' ' '\n' | sort | pr -r -3 -t
2484 }
2485
2486 show_list() {
2487     suffix=_$1
2488     shift
2489     echo $* | sed s/$suffix//g | print_3_columns
2490     exit 0
2491 }
2492
2493 rand_list(){
2494     IFS=', '
2495     set -- $*
2496     unset IFS
2497     for thing; do
2498         comp=${thing%:*}
2499         prob=${thing#$comp}
2500         prob=${prob#:}
2501         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2502         echo "prob ${prob:-0.5}"
2503         printf '%s\n' $comp
2504     done
2505 }
2506
2507 do_random(){
2508     action=$1
2509     shift
2510     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2511     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2512 }
2513
2514 for opt do
2515     optval="${opt#*=}"
2516     case "$opt" in
2517         --extra-ldflags=*)
2518             add_ldflags $optval
2519         ;;
2520         --extra-ldexeflags=*)
2521             add_ldexeflags $optval
2522         ;;
2523         --extra-libs=*)
2524             add_extralibs $optval
2525         ;;
2526         --disable-devices)
2527             disable $INDEV_LIST $OUTDEV_LIST
2528         ;;
2529         --enable-debug=*)
2530             debuglevel="$optval"
2531         ;;
2532         --disable-programs)
2533             disable $PROGRAM_LIST
2534         ;;
2535         --disable-everything)
2536             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2537         ;;
2538         --disable-all)
2539             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2540             disable $LIBRARY_LIST $PROGRAM_LIST doc
2541         ;;
2542         --enable-random|--disable-random)
2543             action=${opt%%-random}
2544             do_random ${action#--} $COMPONENT_LIST
2545         ;;
2546         --enable-random=*|--disable-random=*)
2547             action=${opt%%-random=*}
2548             do_random ${action#--} $optval
2549         ;;
2550         --enable-*=*|--disable-*=*)
2551             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2552             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2553             eval list=\$$(toupper $thing)_LIST
2554             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2555             $action $(filter "$name" $list)
2556         ;;
2557         --enable-avserver|--disable-avserver*)
2558             warn "avserver has been removed, the ${opt} option is only"\
2559                  "provided for compatibility and will be removed in the future"
2560         ;;
2561         --enable-?*|--disable-?*)
2562             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2563             if is_in $option $COMPONENT_LIST; then
2564                 test $action = disable && action=unset
2565                 eval $action \$$(toupper ${option%s})_LIST
2566             elif is_in $option $CMDLINE_SELECT; then
2567                 $action $option
2568             else
2569                 die_unknown $opt
2570             fi
2571         ;;
2572         --list-*)
2573             NAME="${opt#--list-}"
2574             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2575             NAME=${NAME%s}
2576             eval show_list $NAME \$$(toupper $NAME)_LIST
2577         ;;
2578         --help|-h) show_help
2579         ;;
2580         *)
2581             optname="${opt%%=*}"
2582             optname="${optname#--}"
2583             optname=$(echo "$optname" | sed 's/-/_/g')
2584             if is_in $optname $CMDLINE_SET; then
2585                 eval $optname='$optval'
2586             elif is_in $optname $CMDLINE_APPEND; then
2587                 append $optname "$optval"
2588             else
2589                 die_unknown $opt
2590             fi
2591         ;;
2592     esac
2593 done
2594
2595 for e in $env; do
2596     eval "export $e"
2597 done
2598
2599 disabled logging && logfile=/dev/null
2600
2601 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2602 set >> $logfile
2603
2604 case "$toolchain" in
2605     clang-asan)
2606         cc_default="clang"
2607         add_cflags  -fsanitize=address
2608         add_ldflags -fsanitize=address
2609     ;;
2610     clang-tsan)
2611         cc_default="clang"
2612         add_cflags  -fsanitize=thread -pie
2613         add_ldflags -fsanitize=thread -pie
2614     ;;
2615     clang-usan)
2616         cc_default="clang"
2617         add_cflags  -fsanitize=undefined -O1
2618         add_ldflags -fsanitize=undefined
2619     ;;
2620     gcc-asan)
2621         cc_default="gcc"
2622         add_cflags  -fsanitize=address
2623         add_ldflags -fsanitize=address
2624     ;;
2625     gcc-tsan)
2626         cc_default="gcc"
2627         add_cflags  -fsanitize=thread -pie -fPIC
2628         add_ldflags -fsanitize=thread -pie -fPIC
2629     ;;
2630     gcc-usan)
2631         cc_default="gcc"
2632         add_cflags  -fsanitize=undefined
2633         add_ldflags -fsanitize=undefined
2634     ;;
2635     valgrind-massif)
2636         target_exec_default="valgrind"
2637         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2638     ;;
2639     valgrind-memcheck)
2640         target_exec_default="valgrind"
2641         target_exec_args="--track-origins=yes --leak-check=full"
2642     ;;
2643     msvc)
2644         # Check whether the current MSVC version needs the C99 converter.
2645         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2646         # support enough of C99 to build libav. Default to the new
2647         # behaviour if the regexp was unable to match anything, since this
2648         # successfully parses the version number of existing supported
2649         # versions that require the converter (MSVC 2010 and 2012).
2650         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2651         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2652             cc_default="cl"
2653         else
2654             cc_default="c99wrap cl"
2655         fi
2656         ld_default="$source_path/compat/windows/mslink"
2657         nm_default="dumpbin -symbols"
2658         ar_default="lib"
2659         case "$arch" in
2660         arm*)
2661             as_default="armasm"
2662             ;;
2663         esac
2664         target_os_default="win32"
2665         # Use a relative path for TMPDIR. This makes sure all the
2666         # ffconf temp files are written with a relative path, avoiding
2667         # issues with msys/win32 path conversion for MSVC parameters
2668         # such as -Fo<file> or -out:<file>.
2669         TMPDIR=.
2670     ;;
2671     icl)
2672         cc_default="icl"
2673         ld_default="xilink"
2674         nm_default="dumpbin -symbols"
2675         ar_default="xilib"
2676         target_os_default="win32"
2677         TMPDIR=.
2678     ;;
2679     gcov)
2680         add_cflags  -fprofile-arcs -ftest-coverage
2681         add_ldflags -fprofile-arcs -ftest-coverage
2682     ;;
2683     hardened)
2684         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2685         add_cflags   -fno-strict-overflow -fstack-protector-all
2686         add_ldflags  -Wl,-z,relro -Wl,-z,now
2687     ;;
2688     ?*)
2689         die "Unknown toolchain $toolchain"
2690     ;;
2691 esac
2692
2693 test -n "$cross_prefix" && enable cross_compile
2694
2695 if enabled cross_compile; then
2696     test -n "$arch" && test -n "$target_os" ||
2697         die "Must specify target arch and OS when cross-compiling"
2698 fi
2699
2700 ar_default="${cross_prefix}${ar_default}"
2701 cc_default="${cross_prefix}${cc_default}"
2702 nm_default="${cross_prefix}${nm_default}"
2703 pkg_config_default="${cross_prefix}${pkg_config_default}"
2704 ranlib="${cross_prefix}${ranlib}"
2705 strip="${cross_prefix}${strip}"
2706
2707 sysinclude_default="${sysroot}/usr/include"
2708
2709 set_default arch cc pkg_config sysinclude target_exec target_os
2710 enabled cross_compile || host_cc_default=$cc
2711 set_default host_cc
2712
2713 if ! $pkg_config --version >/dev/null 2>&1; then
2714     warn "$pkg_config not found, library detection may fail."
2715     pkg_config=false
2716 fi
2717
2718 exesuf() {
2719     case $1 in
2720         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2721     esac
2722 }
2723
2724 EXESUF=$(exesuf $target_os)
2725 HOSTEXESUF=$(exesuf $host_os)
2726
2727 # set temporary file name
2728 : ${TMPDIR:=$TEMPDIR}
2729 : ${TMPDIR:=$TMP}
2730 : ${TMPDIR:=/tmp}
2731
2732 if ! check_cmd mktemp -u XXXXXX; then
2733     # simple replacement for missing mktemp
2734     # NOT SAFE FOR GENERAL USE
2735     mktemp(){
2736         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2737     }
2738 fi
2739
2740 tmpfile(){
2741     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2742         (set -C; exec > $tmp) 2>/dev/null ||
2743         die "Unable to create temporary file in $TMPDIR."
2744     append TMPFILES $tmp
2745     eval $1=$tmp
2746 }
2747
2748 trap 'rm -f -- $TMPFILES' EXIT
2749
2750 tmpfile TMPASM .asm
2751 tmpfile TMPC   .c
2752 tmpfile TMPE   $EXESUF
2753 tmpfile TMPH   .h
2754 tmpfile TMPO   .o
2755 tmpfile TMPS   .S
2756 tmpfile TMPSH  .sh
2757 tmpfile TMPV   .ver
2758
2759 unset -f mktemp
2760
2761 chmod +x $TMPE
2762
2763 # make sure we can execute files in $TMPDIR
2764 cat > $TMPSH 2>> $logfile <<EOF
2765 #! /bin/sh
2766 EOF
2767 chmod +x $TMPSH >> $logfile 2>&1
2768 if ! $TMPSH >> $logfile 2>&1; then
2769     cat <<EOF
2770 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2771 variable to another directory and make sure that it is not mounted noexec.
2772 EOF
2773     die "Sanity test failed."
2774 fi
2775
2776 armasm_flags(){
2777     for flag; do
2778         case $flag in
2779             # Filter out MSVC cl.exe options from cflags that shouldn't
2780             # be passed to gas-preprocessor
2781             -M[TD]*)                                            ;;
2782             *)                  echo $flag                      ;;
2783         esac
2784    done
2785 }
2786
2787 ccc_flags(){
2788     for flag; do
2789         case $flag in
2790             -std=c99)           echo -c99                       ;;
2791             -mcpu=*)            echo -arch ${flag#*=}           ;;
2792             -mieee)             echo -ieee                      ;;
2793             -O*|-fast)          echo $flag                      ;;
2794             -fno-math-errno)    echo -assume nomath_errno       ;;
2795             -g)                 echo -g3                        ;;
2796             -Wall)              echo -msg_enable level2         ;;
2797             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2798             -Wl,*)              echo $flag                      ;;
2799             -f*|-W*)                                            ;;
2800             *)                  echo $flag                      ;;
2801         esac
2802    done
2803 }
2804
2805 cparser_flags(){
2806     for flag; do
2807         case $flag in
2808             -Wno-switch)             echo -Wno-switch-enum ;;
2809             -Wno-format-zero-length) ;;
2810             -Wdisabled-optimization) ;;
2811             -Wno-pointer-sign)       echo -Wno-other ;;
2812             *)                       echo $flag ;;
2813         esac
2814     done
2815 }
2816
2817 msvc_common_flags(){
2818     for flag; do
2819         case $flag in
2820             # In addition to specifying certain flags under the compiler
2821             # specific filters, they must be specified here as well or else the
2822             # generic catch all at the bottom will print the original flag.
2823             -Wall)                ;;
2824             -std=c99)             ;;
2825             # Common flags
2826             -fomit-frame-pointer) ;;
2827             -g)                   echo -Z7 ;;
2828             -fno-math-errno)      ;;
2829             -fno-common)          ;;
2830             -fno-signed-zeros)    ;;
2831             -fPIC)                ;;
2832             -mthumb)              ;;
2833             -march=*)             ;;
2834             -lz)                  echo zlib.lib ;;
2835             -lavifil32)           echo vfw32.lib ;;
2836             -lavicap32)           echo vfw32.lib user32.lib ;;
2837             -l*)                  echo ${flag#-l}.lib ;;
2838             -L*)                  echo -libpath:${flag#-L} ;;
2839             *)                    echo $flag ;;
2840         esac
2841     done
2842 }
2843
2844 msvc_flags(){
2845     msvc_common_flags "$@"
2846     for flag; do
2847         case $flag in
2848             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2849                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2850                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2851                                        -wd4273 -wd4554 -wd4701 ;;
2852         esac
2853     done
2854 }
2855
2856 icl_flags(){
2857     msvc_common_flags "$@"
2858     for flag; do
2859         case $flag in
2860             # Despite what Intel's documentation says -Wall, which is supported
2861             # on Windows, does enable remarks so disable them here.
2862             -Wall)                echo $flag -Qdiag-disable:remark ;;
2863             -std=c99)             echo -Qstd=c99 ;;
2864         esac
2865     done
2866 }
2867
2868 pgi_flags(){
2869     for flag; do
2870         case $flag in
2871             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2872             -fomit-frame-pointer) echo -Mnoframe ;;
2873             -g)                   echo -gopt ;;
2874             *)                    echo $flag ;;
2875         esac
2876     done
2877 }
2878
2879 suncc_flags(){
2880     for flag; do
2881         case $flag in
2882             -march=*|-mcpu=*)
2883                 case "${flag#*=}" in
2884                     native)                   echo -xtarget=native       ;;
2885                     v9|niagara)               echo -xarch=sparc          ;;
2886                     ultrasparc)               echo -xarch=sparcvis       ;;
2887                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2888                     i586|pentium)             echo -xchip=pentium        ;;
2889                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2890                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2891                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2892                     pentium4*)          echo -xtarget=pentium4           ;;
2893                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2894                     *-sse3)             echo -xarch=sse3                 ;;
2895                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2896                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2897                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2898                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2899                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2900                     k8|opteron|athlon64|athlon-fx)
2901                                                echo -xarch=sse2a         ;;
2902                     athlon*)                   echo -xarch=pentium_proa  ;;
2903                 esac
2904                 ;;
2905             -std=c99)             echo -xc99              ;;
2906             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2907             -fPIC)                echo -KPIC -xcode=pic32 ;;
2908             -W*,*)                echo $flag              ;;
2909             -f*-*|-W*|-mimpure-text)                      ;;
2910             -shared)              echo -G                 ;;
2911             *)                    echo $flag              ;;
2912         esac
2913     done
2914 }
2915
2916 tms470_flags(){
2917     for flag; do
2918         case $flag in
2919             -march=*|-mcpu=*)
2920                 case "${flag#*=}" in
2921                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2922                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2923                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2924                     armv6*|arm11*)          echo -mv=6   ;;
2925                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2926                                             echo -mv=5e  ;;
2927                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2928                 esac
2929                 ;;
2930             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2931             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2932             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2933             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2934             -msoft-float)   echo --float_support=vfplib       ;;
2935             -O[0-3]|-mf=*)  echo $flag                        ;;
2936             -g)             echo -g -mn                       ;;
2937             -pds=*)         echo $flag                        ;;
2938             -D*|-I*)        echo $flag                        ;;
2939             --gcc|--abi=*)  echo $flag                        ;;
2940             -me)            echo $flag                        ;;
2941         esac
2942     done
2943 }
2944
2945 probe_cc(){
2946     pfx=$1
2947     _cc=$2
2948
2949     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2950     unset _ld_o _ldflags _ld_lib _ld_path
2951     unset _depflags _DEPCMD _DEPFLAGS
2952     _flags_filter=echo
2953
2954     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2955         _type=llvm_gcc
2956         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
2957         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
2958         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2959         _cflags_speed='-O3'
2960         _cflags_size='-Os'
2961     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2962         _type=gcc
2963         gcc_version=$($_cc --version | head -n1)
2964         gcc_basever=$($_cc -dumpversion)
2965         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2966         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2967         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2968         if ! $_cc -dumpversion | grep -q '^2\.'; then
2969             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2970         fi
2971         _cflags_speed='-O3'
2972         _cflags_size='-Os'
2973     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2974         _type=icc
2975         _ident=$($_cc --version | head -n1)
2976         _depflags='-MMD'
2977         _cflags_speed='-O3'
2978         _cflags_size='-Os'
2979         _cflags_noopt='-O1'
2980     elif $_cc -v 2>&1 | grep -q xlc; then
2981         _type=xlc
2982         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2983         _cflags_speed='-O5'
2984         _cflags_size='-O5 -qcompact'
2985     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2986         _type=ccc
2987         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2988         _DEPFLAGS='-M'
2989         _cflags_speed='-fast'
2990         _cflags_size='-O1'
2991         _flags_filter=ccc_flags
2992     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
2993         test -d "$sysroot" || die "No valid sysroot specified."
2994         _type=armcc
2995         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
2996         armcc_conf="$PWD/armcc.conf"
2997         $_cc --arm_linux_configure                 \
2998              --arm_linux_config_file="$armcc_conf" \
2999              --configure_sysroot="$sysroot"        \
3000              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3001              die "Error creating armcc configuration file."
3002         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3003         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3004         as_default="${cross_prefix}gcc"
3005         _depflags='-MMD'
3006         _cflags_speed='-O3'
3007         _cflags_size='-Os'
3008     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3009         _type=tms470
3010         _ident=$($_cc -version | head -n1 | tr -s ' ')
3011         _flags='--gcc --abi=eabi -me'
3012         _cc_e='-ppl -fe=$@'
3013         _cc_o='-fe=$@'
3014         _depflags='-ppa -ppd=$(@:.o=.d)'
3015         _cflags_speed='-O3 -mf=5'
3016         _cflags_size='-O3 -mf=2'
3017         _flags_filter=tms470_flags
3018     elif $_cc -v 2>&1 | grep -q clang; then
3019         _type=clang
3020         _ident=$($_cc --version 2>/dev/null | head -n1)
3021         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3022         _cflags_speed='-O3'
3023         _cflags_size='-Os'
3024     elif $_cc -V 2>&1 | grep -q Sun; then
3025         _type=suncc
3026         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3027         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3028         _DEPFLAGS='-xM1 -xc99'
3029         _ldflags='-std=c99'
3030         _cflags_speed='-O5'
3031         _cflags_size='-O5 -xspace'
3032         _flags_filter=suncc_flags
3033     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3034         _type=pathscale
3035         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3036         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3037         _cflags_speed='-O2'
3038         _cflags_size='-Os'
3039         _flags_filter='filter_out -Wdisabled-optimization'
3040     elif $_cc -v 2>&1 | grep -q Open64; then
3041         _type=open64
3042         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3043         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3044         _cflags_speed='-O2'
3045         _cflags_size='-Os'
3046         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3047     elif $_cc -V 2>&1 | grep -q Portland; then
3048         _type=pgi
3049         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3050         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3051         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3052         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3053         _cflags_noopt="-O1"
3054         _flags_filter=pgi_flags
3055     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3056         _type=armasm
3057         _ident=$($_cc | head -n1)
3058         # 4509: "This form of conditional instruction is deprecated"
3059         _flags="-nologo -ignore 4509"
3060         _flags_filter=armasm_flags
3061     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3062         _type=msvc
3063         _ident=$($_cc 2>&1 | head -n1)
3064         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3065         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3066         _cflags_speed="-O2"
3067         _cflags_size="-O1"
3068         if $_cc -nologo- 2>&1 | grep -q Linker; then
3069             _ld_o='-out:$@'
3070         else
3071             _ld_o='-Fe$@'
3072         fi
3073         _cc_o='-Fo$@'
3074         _cc_e='-P -Fi$@'
3075         _flags_filter=msvc_flags
3076         _ld_lib='lib%.a'
3077         _ld_path='-libpath:'
3078         _flags='-nologo'
3079         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS'
3080     elif $_cc 2>&1 | grep -q Intel; then
3081         _type=icl
3082         _ident=$($_cc 2>&1 | head -n1)
3083         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3084         # Not only is O3 broken on 13.x+ but it is slower on all previous
3085         # versions (tested) as well.
3086         _cflags_speed="-O2"
3087         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3088         if $_cc 2>&1 | grep -q Linker; then
3089             _ld_o='-out:$@'
3090         else
3091             _ld_o='-Fe$@'
3092         fi
3093         _cc_o='-Fo$@'
3094         _cc_e='-P'
3095         _flags_filter=icl_flags
3096         _ld_lib='lib%.a'
3097         _ld_path='-libpath:'
3098         # -Qdiag-error to make icl error when seeing certain unknown arguments
3099         _flags='-nologo -Qdiag-error:4044,10157'
3100         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3101         # with MSVC which enables it by default.
3102         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3103     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3104         _type=cparser
3105         _ident=$($_cc --version | head -n1)
3106         _depflags='-MMD'
3107         _cflags_speed='-O4'
3108         _cflags_size='-O2'
3109         _flags_filter=cparser_flags
3110     fi
3111
3112     eval ${pfx}_type=\$_type
3113     eval ${pfx}_ident=\$_ident
3114 }
3115
3116 set_ccvars(){
3117     eval ${1}_C=\${_cc_c-\${${1}_C}}
3118     eval ${1}_E=\${_cc_e-\${${1}_E}}
3119     eval ${1}_O=\${_cc_o-\${${1}_O}}
3120
3121     if [ -n "$_depflags" ]; then
3122         eval ${1}_DEPFLAGS=\$_depflags
3123     else
3124         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3125         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3126         eval DEP${1}FLAGS=\$_flags
3127     fi
3128 }
3129
3130 probe_cc cc "$cc"
3131 cflags_filter=$_flags_filter
3132 cflags_speed=$_cflags_speed
3133 cflags_size=$_cflags_size
3134 cflags_noopt=$_cflags_noopt
3135 add_cflags $_flags $_cflags
3136 cc_ldflags=$_ldflags
3137 set_ccvars CC
3138
3139 probe_cc hostcc "$host_cc"
3140 host_cflags_filter=$_flags_filter
3141 add_host_cflags  $_flags $_cflags
3142 set_ccvars HOSTCC
3143
3144 test -n "$cc_type" && enable $cc_type ||
3145     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3146
3147 : ${as_default:=$cc}
3148 : ${dep_cc_default:=$cc}
3149 : ${ld_default:=$cc}
3150 : ${host_ld_default:=$host_cc}
3151 set_default ar as dep_cc ld host_ld
3152
3153 probe_cc as "$as"
3154 asflags_filter=$_flags_filter
3155 add_asflags $_flags $_cflags
3156 set_ccvars AS
3157
3158 probe_cc ld "$ld"
3159 ldflags_filter=$_flags_filter
3160 add_ldflags $_flags $_ldflags
3161 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3162 LD_O=${_ld_o-$LD_O}
3163 LD_LIB=${_ld_lib-$LD_LIB}
3164 LD_PATH=${_ld_path-$LD_PATH}
3165
3166 probe_cc hostld "$host_ld"
3167 host_ldflags_filter=$_flags_filter
3168 add_host_ldflags $_flags $_ldflags
3169 HOSTLD_O=${_ld_o-$HOSTLD_O}
3170
3171 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3172     probe_cc depcc "$dep_cc"
3173     CCDEP=${_DEPCMD:-$DEPCMD}
3174     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3175     DEPCCFLAGS=$_flags
3176 fi
3177
3178 if $ar 2>&1 | grep -q Microsoft; then
3179     arflags="-nologo"
3180     ar_o='-out:$@'
3181 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3182     arflags="rq"
3183     ar_o='$@'
3184 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3185     arflags='-Xany -r -c'
3186     ar_o='$@'
3187 else
3188     arflags="rc"
3189     ar_o='$@'
3190 fi
3191
3192 add_cflags $extra_cflags
3193 add_asflags $extra_cflags
3194
3195 if test -n "$sysroot"; then
3196     case "$cc_type" in
3197         gcc|llvm_gcc|clang)
3198             add_cppflags --sysroot="$sysroot"
3199             add_ldflags --sysroot="$sysroot"
3200         ;;
3201         tms470)
3202             add_cppflags -I"$sysinclude"
3203             add_ldflags  --sysroot="$sysroot"
3204         ;;
3205     esac
3206 fi
3207
3208 if test "$cpu" = host; then
3209     enabled cross_compile &&
3210         die "--cpu=host makes no sense when cross-compiling."
3211
3212     case "$cc_type" in
3213         gcc|llvm_gcc)
3214             check_native(){
3215                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3216                 sed -n "/cc1.*$1=/{
3217                             s/.*$1=\\([^ ]*\\).*/\\1/
3218                             p
3219                             q
3220                         }" $TMPE
3221             }
3222             cpu=$(check_native -march || check_native -mcpu)
3223         ;;
3224     esac
3225
3226     test "${cpu:-host}" = host &&
3227         die "--cpu=host not supported with compiler $cc"
3228 fi
3229
3230 # Deal with common $arch aliases
3231 case "$arch" in
3232     aarch64|arm64)
3233         arch="aarch64"
3234     ;;
3235     arm*)
3236         arch="arm"
3237     ;;
3238     mips*|IP*)
3239         arch="mips"
3240     ;;
3241     parisc*|hppa*)
3242         arch="parisc"
3243     ;;
3244     "Power Macintosh"|ppc*|powerpc*)
3245         arch="ppc"
3246     ;;
3247     s390|s390x)
3248         arch="s390"
3249     ;;
3250     sh4|sh)
3251         arch="sh4"
3252     ;;
3253     sun4u|sparc*)
3254         arch="sparc"
3255     ;;
3256     tilegx|tile-gx)
3257         arch="tilegx"
3258     ;;
3259     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3260         arch="x86"
3261     ;;
3262 esac
3263
3264 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3265 enable $arch
3266
3267 # Add processor-specific flags
3268 if enabled aarch64; then
3269
3270     case $cpu in
3271         armv*)
3272             cpuflags="-march=$cpu"
3273         ;;
3274         *)
3275             cpuflags="-mcpu=$cpu"
3276         ;;
3277     esac
3278
3279 elif enabled alpha; then
3280
3281     cpuflags="-mcpu=$cpu"
3282
3283 elif enabled arm; then
3284
3285     check_arm_arch() {
3286         check_cpp_condition stddef.h \
3287             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3288             $cpuflags
3289     }
3290
3291     probe_arm_arch() {
3292         if   check_arm_arch 4;        then echo armv4;
3293         elif check_arm_arch 4T;       then echo armv4t;
3294         elif check_arm_arch 5;        then echo armv5;
3295         elif check_arm_arch 5E;       then echo armv5e;
3296         elif check_arm_arch 5T;       then echo armv5t;
3297         elif check_arm_arch 5TE;      then echo armv5te;
3298         elif check_arm_arch 5TEJ;     then echo armv5te;
3299         elif check_arm_arch 6;        then echo armv6;
3300         elif check_arm_arch 6J;       then echo armv6j;
3301         elif check_arm_arch 6K;       then echo armv6k;
3302         elif check_arm_arch 6Z;       then echo armv6z;
3303         elif check_arm_arch 6ZK;      then echo armv6zk;
3304         elif check_arm_arch 6T2;      then echo armv6t2;
3305         elif check_arm_arch 7;        then echo armv7;
3306         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3307         elif check_arm_arch 7S;       then echo armv7-a;
3308         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3309         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3310         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3311         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3312         fi
3313     }
3314
3315     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3316
3317     case $cpu in
3318         armv*)
3319             cpuflags="-march=$cpu"
3320             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3321         ;;
3322         *)
3323             cpuflags="-mcpu=$cpu"
3324             case $cpu in
3325                 cortex-a*)                               subarch=armv7a  ;;
3326                 cortex-r*)                               subarch=armv7r  ;;
3327                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3328                 arm11*)                                  subarch=armv6   ;;
3329                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3330                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3331                 *)                             subarch=$(probe_arm_arch) ;;
3332             esac
3333         ;;
3334     esac
3335
3336     case "$subarch" in
3337         armv5t*)    enable fast_clz                ;;
3338         armv[6-8]*) enable fast_clz fast_unaligned ;;
3339     esac
3340
3341 elif enabled avr32; then
3342
3343     case $cpu in
3344         ap7[02]0[0-2])
3345             subarch="avr32_ap"
3346             cpuflags="-mpart=$cpu"
3347         ;;
3348         ap)
3349             subarch="avr32_ap"
3350             cpuflags="-march=$cpu"
3351         ;;
3352         uc3[ab]*)
3353             subarch="avr32_uc"
3354             cpuflags="-mcpu=$cpu"
3355         ;;
3356         uc)
3357             subarch="avr32_uc"
3358             cpuflags="-march=$cpu"
3359         ;;
3360     esac
3361
3362 elif enabled bfin; then
3363
3364     cpuflags="-mcpu=$cpu"
3365
3366 elif enabled mips; then
3367
3368     cpuflags="-march=$cpu"
3369
3370 elif enabled ppc; then
3371
3372     disable ldbrx
3373
3374     case $(tolower $cpu) in
3375         601|ppc601|powerpc601)
3376             cpuflags="-mcpu=601"
3377             disable altivec
3378         ;;
3379         603*|ppc603*|powerpc603*)
3380             cpuflags="-mcpu=603"
3381             disable altivec
3382         ;;
3383         604*|ppc604*|powerpc604*)
3384             cpuflags="-mcpu=604"
3385             disable altivec
3386         ;;
3387         g3|75*|ppc75*|powerpc75*)
3388             cpuflags="-mcpu=750"
3389             disable altivec
3390         ;;
3391         g4|745*|ppc745*|powerpc745*)
3392             cpuflags="-mcpu=7450"
3393             disable vsx
3394         ;;
3395         74*|ppc74*|powerpc74*)
3396             cpuflags="-mcpu=7400"
3397             disable vsx
3398         ;;
3399         g5|970|ppc970|powerpc970)
3400             cpuflags="-mcpu=970"
3401             disable vsx
3402         ;;
3403         power[3-6]*)
3404             cpuflags="-mcpu=$cpu"
3405             disable vsx
3406         ;;
3407         power[7-8]*)
3408             cpuflags="-mcpu=$cpu"
3409             enable ldbrx
3410         ;;
3411         cell)
3412             cpuflags="-mcpu=cell"
3413             enable ldbrx
3414             disable vsx
3415         ;;
3416         e500mc)
3417             cpuflags="-mcpu=e500mc"
3418             disable altivec
3419         ;;
3420         e500v2)
3421             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3422             disable altivec
3423             disable dcbzl
3424         ;;
3425         e500)
3426             cpuflags="-mcpu=8540 -mhard-float"
3427             disable altivec
3428             disable dcbzl
3429         ;;
3430     esac
3431
3432 elif enabled sparc; then
3433
3434     case $cpu in
3435         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3436             cpuflags="-mcpu=$cpu"
3437         ;;
3438         ultrasparc*|niagara[234])
3439             cpuflags="-mcpu=$cpu"
3440         ;;
3441     esac
3442
3443 elif enabled x86; then
3444
3445     case $cpu in
3446         i[345]86|pentium)
3447             cpuflags="-march=$cpu"
3448             disable i686
3449             disable mmx
3450         ;;
3451         # targets that do NOT support nopl and conditional mov (cmov)
3452         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3453             cpuflags="-march=$cpu"
3454             disable i686
3455         ;;
3456         # targets that do support nopl and conditional mov (cmov)
3457         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3458             cpuflags="-march=$cpu"
3459             enable i686
3460             enable fast_cmov
3461         ;;
3462         # targets that do support conditional mov but on which it's slow
3463         pentium4|pentium4m|prescott|nocona)
3464             cpuflags="-march=$cpu"
3465             enable i686
3466             disable fast_cmov
3467         ;;
3468     esac
3469
3470 fi
3471
3472 if [ "$cpu" != generic ]; then
3473     add_cflags  $cpuflags
3474     add_asflags $cpuflags
3475     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3476 fi
3477
3478 # compiler sanity check
3479 check_exec <<EOF
3480 int main(void){ return 0; }
3481 EOF
3482 if test "$?" != 0; then
3483     echo "$cc is unable to create an executable file."
3484     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3485         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3486         echo "Only do this if you know what cross compiling means."
3487     fi
3488     die "C compiler test failed."
3489 fi
3490
3491 add_cppflags -D_ISOC99_SOURCE
3492 check_cflags -std=c99
3493 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3494 #include <stdlib.h>
3495 EOF
3496 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3497 #include <stdlib.h>
3498 EOF
3499
3500 add_host_cppflags -D_ISOC99_SOURCE
3501 check_host_cflags -std=c99
3502 check_host_cflags -Wall
3503 check_host_cflags -O3
3504
3505 check_64bit(){
3506     arch32=$1
3507     arch64=$2
3508     expr=$3
3509     check_code cc "" "int test[2*($expr) - 1]" &&
3510         subarch=$arch64 || subarch=$arch32
3511 }
3512
3513 case "$arch" in
3514     aarch64|alpha|ia64)
3515         spic=$shared
3516     ;;
3517     mips)
3518         check_64bit mips mips64 '_MIPS_SIM > 1'
3519         spic=$shared
3520     ;;
3521     parisc)
3522         check_64bit parisc parisc64 'sizeof(void *) > 4'
3523         spic=$shared
3524     ;;
3525     ppc)
3526         check_64bit ppc ppc64 'sizeof(void *) > 4'
3527         spic=$shared
3528     ;;
3529     s390)
3530         check_64bit s390 s390x 'sizeof(void *) > 4'
3531         spic=$shared
3532     ;;
3533     sparc)
3534         check_64bit sparc sparc64 'sizeof(void *) > 4'
3535         spic=$shared
3536     ;;
3537     x86)
3538         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3539         if test "$subarch" = "x86_64"; then
3540             spic=$shared
3541         fi
3542     ;;
3543 esac
3544
3545 enable $subarch
3546 enabled spic && enable_weak pic
3547
3548 # OS specific
3549 case $target_os in
3550     aix)
3551         SHFLAGS=-shared
3552         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3553         enabled shared && add_ldflags -Wl,-brtl
3554         ;;
3555     android)
3556         disable symver
3557         enable section_data_rel_ro
3558         SLIB_INSTALL_NAME='$(SLIBNAME)'
3559         SLIB_INSTALL_LINKS=
3560         # soname not set on purpose
3561         SHFLAGS=-shared
3562         ;;
3563     haiku)
3564         prefix_default="/boot/common"
3565         network_extralibs="-lnetwork"
3566         host_libs=
3567         ;;
3568     sunos)
3569         SHFLAGS='-shared -Wl,-h,$$(@F)'
3570         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3571         network_extralibs="-lsocket -lnsl"
3572         # When using suncc to build, the Solaris linker will mark
3573         # an executable with each instruction set encountered by
3574         # the Solaris assembler.  As our libraries contain their own
3575         # guards for processor-specific code, instead suppress
3576         # generation of the HWCAPS ELF section on Solaris x86 only.
3577         enabled_all suncc x86 &&
3578             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3579             add_ldflags -Wl,-M,mapfile
3580         nm_default='nm -P -g'
3581         ;;
3582     netbsd)
3583         disable symver
3584         oss_indev_extralibs="-lossaudio"
3585         oss_outdev_extralibs="-lossaudio"
3586         ;;
3587     openbsd|bitrig)
3588         disable symver
3589         SHFLAGS='-shared'
3590         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3591         SLIB_INSTALL_LINKS=
3592         oss_indev_extralibs="-lossaudio"
3593         oss_outdev_extralibs="-lossaudio"
3594         ;;
3595     dragonfly)
3596         disable symver
3597         ;;
3598     freebsd)
3599         ;;
3600     bsd/os)
3601         add_extralibs -lpoll -lgnugetopt
3602         ;;
3603     darwin)
3604         enabled ppc && add_asflags -force_cpusubtype_ALL
3605         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3606         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3607         add_ldflags -Wl,-dynamic,-search_paths_first
3608         SLIBSUF=".dylib"
3609         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3610         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3611         objformat="macho"
3612         enabled x86_64 && objformat="macho64"
3613         enabled_any pic shared ||
3614             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3615         ;;
3616     mingw32*)
3617         if test $target_os = "mingw32ce"; then
3618             disable network
3619         else
3620             target_os=mingw32
3621         fi
3622         LIBTARGET=i386
3623         if enabled x86_64; then
3624             LIBTARGET="i386:x86-64"
3625         elif enabled arm; then
3626             LIBTARGET=arm-wince
3627         fi
3628         check_ldflags -Wl,--nxcompat
3629         check_ldflags -Wl,--dynamicbase
3630         shlibdir_default="$bindir_default"
3631         SLIBPREF=""
3632         SLIBSUF=".dll"
3633         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3634         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3635         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3636         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3637         SLIB_INSTALL_LINKS=
3638         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3639         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3640         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3641         objformat="win32"
3642         dlltool="${cross_prefix}dlltool"
3643         ranlib=:
3644         enable dos_paths
3645         ;;
3646     win32|win64)
3647         disable symver
3648         if enabled shared; then
3649             # Link to the import library instead of the normal static library
3650             # for shared libs.
3651             LD_LIB='%.lib'
3652             # Cannot build both shared and static libs with MSVC or icl.
3653             disable static
3654         fi
3655         shlibdir_default="$bindir_default"
3656         SLIBPREF=""
3657         SLIBSUF=".dll"
3658         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3659         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3660         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3661         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3662         SLIB_INSTALL_LINKS=
3663         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3664         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3665         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3666         objformat="win32"
3667         ranlib=:
3668         enable dos_paths
3669         ;;
3670     cygwin*)
3671         target_os=cygwin
3672         shlibdir_default="$bindir_default"
3673         SLIBPREF="cyg"
3674         SLIBSUF=".dll"
3675         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3676         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3677         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3678         SLIB_INSTALL_LINKS=
3679         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3680         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3681         objformat="win32"
3682         enable dos_paths
3683         ;;
3684     *-dos|freedos|opendos)
3685         network_extralibs="-lsocket"
3686         objformat="coff"
3687         enable dos_paths
3688         add_cppflags -U__STRICT_ANSI__
3689         ;;
3690     linux)
3691         enable dv1394
3692         enable section_data_rel_ro
3693         ;;
3694     irix*)
3695         target_os=irix
3696         ranlib="echo ignoring ranlib"
3697         ;;
3698     os/2*)
3699         ln_s="cp -f"
3700         objformat="aout"
3701         add_cppflags -D_GNU_SOURCE
3702         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3703         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3704         LIBSUF="_s.a"
3705         SLIBPREF=""
3706         SLIBSUF=".dll"
3707         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3708         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3709         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3710             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3711             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3712             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3713             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3714         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3715             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3716         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3717         enable dos_paths
3718         ;;
3719     gnu/kfreebsd)
3720         add_cppflags -D_BSD_SOURCE
3721         ;;
3722     gnu)
3723         ;;
3724     qnx)
3725         add_cppflags -D_QNX_SOURCE
3726         network_extralibs="-lsocket"
3727         ;;
3728     symbian)
3729         SLIBSUF=".dll"
3730         enable dos_paths
3731         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3732         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3733         add_ldflags -Wl,--target1-abs,--no-undefined \
3734                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3735                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3736         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3737                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3738                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3739         ;;
3740     osf1)
3741         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3742         ;;
3743     minix)
3744         ;;
3745     plan9)
3746         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3747                      -D_REENTRANT_SOURCE        \
3748                      -D_RESEARCH_SOURCE         \
3749                      -DFD_SETSIZE=96            \
3750                      -DHAVE_SOCK_OPTS
3751         add_compat strtod.o strtod=avpriv_strtod
3752         network_extralibs='-lbsd'
3753         exeobjs=compat/plan9/main.o
3754         cp_f='cp'
3755         ;;
3756     none)
3757         ;;
3758     *)
3759         die "Unknown OS '$target_os'."
3760         ;;
3761 esac
3762
3763 # determine libc flavour
3764
3765 probe_libc(){
3766     pfx=$1
3767     pfx_no_=${pfx%_}
3768     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3769     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3770         eval ${pfx}libc_type=uclibc
3771         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3772     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3773         eval ${pfx}libc_type=glibc
3774         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3775     # MinGW headers can be installed on Cygwin, so check for newlib first.
3776     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3777         eval ${pfx}libc_type=newlib
3778         add_${pfx}cppflags -U__STRICT_ANSI__
3779     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3780     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3781         eval ${pfx}libc_type=mingw64
3782         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3783         eval test \$${pfx_no_}cc_type = "gcc" &&
3784             add_${pfx}cppflags -D__printf__=__gnu_printf__
3785     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3786          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3787         eval ${pfx}libc_type=mingw32
3788         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3789             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3790             die "ERROR: MinGW32 runtime version must be >= 3.15."
3791         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3792         eval test \$${pfx_no_}cc_type = "gcc" &&
3793             add_${pfx}cppflags -D__printf__=__gnu_printf__
3794     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3795         eval ${pfx}libc_type=msvcrt
3796         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3797             if [ "$pfx" = host_ ]; then
3798                 add_host_cppflags -Dsnprintf=_snprintf
3799             else
3800                 add_compat strtod.o strtod=avpriv_strtod
3801                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3802                                              _snprintf=avpriv_snprintf  \
3803                                              vsnprintf=avpriv_vsnprintf
3804             fi
3805         fi
3806         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3807         # 0x601 by default unless something else is set by the user.
3808         # This can easily lead to us detecting functions only present
3809         # in such new versions and producing binaries requiring windows 7.0.
3810         # Therefore explicitly set the default to XP unless the user has
3811         # set something else on the command line.
3812         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3813         # family. For these cases, configure is free to use any functions
3814         # found in the SDK headers by default. (Alternatively, we could force
3815         # _WIN32_WINNT to 0x0602 in that case.)
3816         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3817             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3818 #ifdef WINAPI_FAMILY
3819 #include <winapifamily.h>
3820 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3821 #error not desktop
3822 #endif
3823 #endif
3824 EOF
3825     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3826         eval ${pfx}libc_type=klibc
3827     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3828         eval ${pfx}libc_type=bionic
3829     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3830         eval ${pfx}libc_type=solaris
3831         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3832     else
3833         eval ${pfx}libc_type=default
3834         add_${pfx}cppflags -D_DEFAULT_SOURCE
3835     fi
3836 }
3837
3838 probe_libc
3839 test -n "$libc_type" && enable libc_$libc_type
3840 probe_libc host_
3841 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3842
3843 case $libc_type in
3844     bionic)
3845         add_compat strtod.o strtod=avpriv_strtod
3846         ;;
3847 esac
3848
3849 # hacks for compiler/libc/os combinations
3850
3851 if enabled_all tms470 libc_glibc; then
3852     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3853     add_cppflags -D__USER_LABEL_PREFIX__=
3854     add_cppflags -D__builtin_memset=memset
3855     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3856     add_cflags   -pds=48    # incompatible redefinition of macro
3857 fi
3858
3859 if enabled_all ccc libc_glibc; then
3860     add_ldflags -Wl,-z,now  # calls to libots crash without this
3861 fi
3862
3863 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3864     add_cppflags '-I\$(SRC_PATH)/compat/float'
3865
3866 esc(){
3867     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3868 }
3869
3870 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3871
3872 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3873
3874 set_default $PATHS_LIST
3875 set_default nm
3876
3877 # we need to build at least one lib type
3878 if ! enabled_any static shared; then
3879     cat <<EOF
3880 At least one library type must be built.
3881 Specify --enable-static to build the static libraries or --enable-shared to
3882 build the shared libraries as well. To only build the shared libraries specify
3883 --disable-static in addition to --enable-shared.
3884 EOF
3885     exit 1;
3886 fi
3887
3888 die_license_disabled() {
3889     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3890 }
3891
3892 die_license_disabled gpl libcdio
3893 die_license_disabled gpl libx264
3894 die_license_disabled gpl libx265
3895 die_license_disabled gpl libxavs
3896 die_license_disabled gpl libxvid
3897 die_license_disabled gpl x11grab
3898
3899 die_license_disabled nonfree libfaac
3900 die_license_disabled nonfree libfdk_aac
3901 die_license_disabled nonfree nvenc
3902 die_license_disabled nonfree openssl
3903
3904 die_license_disabled version3 libopencore_amrnb
3905 die_license_disabled version3 libopencore_amrwb
3906 die_license_disabled version3 libvo_aacenc
3907 die_license_disabled version3 libvo_amrwbenc
3908
3909 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3910
3911 disabled optimizations || check_cflags -fomit-frame-pointer
3912
3913 enable_weak_pic() {
3914     disabled pic && return
3915     enable pic
3916     add_cppflags -DPIC
3917     case "$target_os" in
3918     mingw*|cygwin*)
3919         ;;
3920     *)
3921         add_cflags -fPIC
3922         ;;
3923     esac
3924     add_asflags  -fPIC
3925 }
3926
3927 enabled pic && enable_weak_pic
3928
3929 check_cc <<EOF || die "Symbol mangling check failed."
3930 int ff_extern;
3931 EOF
3932 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3933 extern_prefix=${sym%%ff_extern*}
3934
3935 check_cc <<EOF && enable_weak inline_asm
3936 void foo(void) { __asm__ volatile ("" ::); }
3937 EOF
3938
3939 _restrict=
3940 for restrict_keyword in restrict __restrict__ __restrict; do
3941     check_cc <<EOF && _restrict=$restrict_keyword && break
3942 void foo(char * $restrict_keyword p);
3943 EOF
3944 done
3945
3946 check_cc <<EOF && enable pragma_deprecated
3947 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3948 EOF
3949
3950 check_cc <<EOF && enable attribute_packed
3951 struct { int x; } __attribute__((packed)) x;
3952 EOF
3953
3954 check_cc <<EOF && enable attribute_may_alias
3955 union { int x; } __attribute__((may_alias)) x;
3956 EOF
3957
3958 check_cc <<EOF || die "endian test failed"
3959 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3960 EOF
3961 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3962
3963 check_gas() {
3964     log "check_gas using '$as' as AS"
3965     # :vararg is used on aarch64, arm and ppc altivec
3966     check_as <<EOF || return 1
3967 .macro m n, y:vararg=0
3968 \n: .int \y
3969 .endm
3970 m x
3971 EOF
3972     # .altmacro is only used in arm asm
3973     ! enabled arm || check_as <<EOF || return 1
3974 .altmacro
3975 EOF
3976     enable gnu_as
3977     return 0
3978 }
3979
3980 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
3981     nogas=:
3982     enabled_any arm aarch64 && nogas=die
3983     enabled_all ppc altivec && nogas=warn
3984     as_noop=-v
3985
3986     case $as_type in
3987         arm*) gaspp_as_type=armasm; as_noop=-h ;;
3988         gcc)  gaspp_as_type=gas ;;
3989         *)    gaspp_as_type=$as_type ;;
3990     esac
3991
3992     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
3993
3994     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
3995         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
3996
3997     if ! check_gas ; then
3998         as=${gas:=$as}
3999         check_gas || \
4000             $nogas "GNU assembler not found, install/update gas-preprocessor"
4001     fi
4002
4003     check_as <<EOF && enable as_func
4004 .func test
4005 .endfunc
4006 EOF
4007 fi
4008
4009 check_inline_asm inline_asm_labels '"1:\n"'
4010
4011 if enabled aarch64; then
4012     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4013     # internal assembler in clang 3.3 does not support this instruction
4014     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4015     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4016
4017     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4018
4019 elif enabled alpha; then
4020
4021     check_cflags -mieee
4022
4023 elif enabled arm; then
4024
4025     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4026     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4027     enabled thumb && check_cflags -mthumb || check_cflags -marm
4028
4029     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4030         enable vfp_args
4031     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4032         enable vfp_args
4033     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4034         case "${cross_prefix:-$cc}" in
4035             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4036             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4037 __asm__ (".eabi_attribute 28, 1");
4038 int main(void) { return 0; }
4039 EOF
4040         esac
4041         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4042     fi
4043
4044     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4045     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4046     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4047     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4048     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4049     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4050
4051     [ $target_os = linux ] || [ $target_os = android ] ||
4052         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4053             $ARCH_EXT_LIST_ARM
4054
4055     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4056
4057     check_as <<EOF && enable as_dn_directive
4058 ra .dn d0.i16
4059 .unreq ra
4060 EOF
4061
4062     # llvm's integrated assembler supports .object_arch from llvm 3.5
4063     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4064 .object_arch armv4
4065 EOF
4066
4067     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4068
4069 elif enabled mips; then
4070
4071     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4072
4073     # make sure that only an instruction set is enabled
4074     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4075
4076     if enabled mips64; then
4077         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4078             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4079                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4080     else
4081         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4082             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4083                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4084     fi
4085
4086 elif enabled parisc; then
4087
4088     if enabled gcc; then
4089         case $($cc -dumpversion) in
4090             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4091         esac
4092     fi
4093
4094 elif enabled ppc; then
4095
4096     enable local_aligned_8 local_aligned_16
4097
4098     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4099     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4100     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4101     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4102
4103     # AltiVec flags: The FSF version of GCC differs from the Apple version
4104     if enabled altivec; then
4105         check_cflags -maltivec -mabi=altivec &&
4106         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4107         check_cflags -faltivec
4108
4109         # check if our compiler supports Motorola AltiVec C API
4110         check_cc <<EOF || disable altivec
4111 $inc_altivec_h
4112 int main(void) {
4113     vector signed int v1 = (vector signed int) { 0 };
4114     vector signed int v2 = (vector signed int) { 1 };
4115     v1 = vec_add(v1, v2);
4116     return 0;
4117 }
4118 EOF
4119
4120         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4121     fi
4122
4123     if enabled vsx; then
4124         check_cflags -mvsx &&
4125         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4126     fi
4127
4128     if enabled power8; then
4129         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4130     fi
4131
4132 elif enabled x86; then
4133
4134     check_builtin rdtsc    intrin.h   "__rdtsc()"
4135     check_builtin mm_empty mmintrin.h "_mm_empty()"
4136
4137     enable local_aligned_8 local_aligned_16
4138
4139     # check whether EBP is available on x86
4140     # As 'i' is stored on the stack, this program will crash
4141     # if the base pointer is used to access it because the
4142     # base pointer is cleared in the inline assembly code.
4143     check_exec_crash <<EOF && enable ebp_available
4144 volatile int i=0;
4145 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4146 return i;
4147 EOF
4148
4149     # check whether EBX is available on x86
4150     check_inline_asm ebx_available '""::"b"(0)' &&
4151         check_inline_asm ebx_available '"":::"%ebx"'
4152
4153     # check whether xmm clobbers are supported
4154     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4155
4156     # check whether binutils is new enough to compile SSSE3/MMXEXT
4157     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4158     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4159
4160     if ! disabled_any asm mmx yasm; then
4161         if check_cmd $yasmexe --version; then
4162             enabled x86_64 && yasm_extra="-m amd64"
4163             yasm_debug="-g dwarf2"
4164         elif check_cmd nasm -v; then
4165             yasmexe=nasm
4166             yasm_debug="-g -F dwarf"
4167             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4168         fi
4169
4170         YASMFLAGS="-f $objformat $yasm_extra"
4171         enabled pic               && append YASMFLAGS "-DPIC"
4172         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4173         case "$objformat" in
4174             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4175         esac
4176
4177         check_yasm "movbe ecx, [5]" && enable yasm ||
4178             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4179         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4180         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4181         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4182         check_yasm "CPU amdnop" || disable cpunop
4183     fi
4184
4185     case "$cpu" in
4186         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4187             disable fast_clz
4188         ;;
4189     esac
4190
4191 fi
4192
4193 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4194
4195 check_ldflags -Wl,--as-needed
4196
4197 if check_func dlopen; then
4198     ldl=
4199 elif check_func dlopen -ldl; then
4200     ldl=-ldl
4201 fi
4202
4203 if ! disabled network; then
4204     check_func getaddrinfo $network_extralibs
4205     check_func getservbyport $network_extralibs
4206     check_func inet_aton $network_extralibs
4207
4208     check_type netdb.h "struct addrinfo"
4209     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4210     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4211     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4212     check_type poll.h "struct pollfd"
4213     check_type netinet/sctp.h "struct sctp_event_subscribe"
4214     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4215     check_type netinet/in.h "struct sockaddr_in6"
4216     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4217     check_type "sys/types.h sys/socket.h" socklen_t
4218
4219     # Prefer arpa/inet.h over winsock2
4220     if check_header arpa/inet.h ; then
4221         check_func closesocket
4222     elif check_header winsock2.h ; then
4223         check_func_headers winsock2.h closesocket -lws2 &&
4224             network_extralibs="-lws2" ||
4225         { check_func_headers winsock2.h closesocket -lws2_32 &&
4226             network_extralibs="-lws2_32"; } || disable winsock2_h network
4227         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4228
4229         check_type ws2tcpip.h socklen_t
4230         check_type ws2tcpip.h "struct addrinfo"
4231         check_type ws2tcpip.h "struct group_source_req"
4232         check_type ws2tcpip.h "struct ip_mreq_source"
4233         check_type ws2tcpip.h "struct ipv6_mreq"
4234         check_type winsock2.h "struct pollfd"
4235         check_struct winsock2.h "struct sockaddr" sa_len
4236         check_type ws2tcpip.h "struct sockaddr_in6"
4237         check_type ws2tcpip.h "struct sockaddr_storage"
4238     else
4239         disable network
4240     fi
4241 fi
4242
4243 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4244 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4245 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4246 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4247
4248 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4249 check_func  ${malloc_prefix}memalign            && enable memalign
4250 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4251
4252 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4253     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4254
4255 check_func  fcntl
4256 check_func  fork
4257 check_func  gethrtime
4258 check_func  getopt
4259 check_func  getrusage
4260 check_func  gettimeofday
4261 check_func  gmtime_r
4262 check_func  isatty
4263 check_func  localtime_r
4264 check_func  mach_absolute_time
4265 check_func  mkstemp
4266 check_func  mmap
4267 check_func  mprotect
4268 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4269 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4270 check_func  sched_getaffinity
4271 check_func  setrlimit
4272 check_func  strerror_r
4273 check_func  sysconf
4274 check_func  sysctl
4275 check_func  usleep
4276
4277 check_func_headers io.h setmode
4278 check_func_headers stdlib.h getenv
4279
4280 check_func_headers windows.h CoTaskMemFree -lole32
4281 check_func_headers windows.h GetProcessAffinityMask
4282 check_func_headers windows.h GetProcessTimes
4283 check_func_headers windows.h GetSystemTimeAsFileTime
4284 check_func_headers windows.h LoadLibrary
4285 check_func_headers windows.h MapViewOfFile
4286 check_func_headers windows.h SetConsoleTextAttribute
4287 check_func_headers windows.h Sleep
4288 check_func_headers windows.h VirtualAlloc
4289 check_struct windows.h "CONDITION_VARIABLE" Ptr
4290
4291 check_header direct.h
4292 check_header dlfcn.h
4293 check_header d3d11.h
4294 check_header dxva.h
4295 check_header dxva2api.h
4296 check_header io.h
4297 check_header mach/mach_time.h
4298 check_header malloc.h
4299 check_header poll.h
4300 check_header sys/mman.h
4301 check_header sys/param.h
4302 check_header sys/resource.h
4303 check_header sys/select.h
4304 check_header sys/time.h
4305 check_header sys/un.h
4306 check_header unistd.h
4307 check_header valgrind/valgrind.h
4308 check_header vdpau/vdpau.h
4309 check_header vdpau/vdpau_x11.h
4310 check_header VideoDecodeAcceleration/VDADecoder.h
4311 check_header windows.h
4312 check_header X11/extensions/XvMClib.h
4313
4314 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4315 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4316 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4317
4318 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4319
4320 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4321 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4322 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4323
4324 if ! disabled w32threads && ! enabled pthreads; then
4325     check_func_headers "windows.h process.h" _beginthreadex &&
4326         enable w32threads || disable w32threads
4327 fi
4328
4329 # check for some common methods of building with pthread support
4330 # do this before the optional library checks as some of them require pthreads
4331 if ! disabled pthreads && ! enabled w32threads; then
4332     enable pthreads
4333     if check_func pthread_join -pthread; then
4334         add_cflags -pthread
4335         add_extralibs -pthread
4336     elif check_func pthread_join -pthreads; then
4337         add_cflags -pthreads
4338         add_extralibs -pthreads
4339     elif check_func pthread_join -lpthreadGC2; then
4340         add_extralibs -lpthreadGC2
4341     elif check_lib pthread.h pthread_join -lpthread; then
4342         :
4343     elif ! check_func pthread_join; then
4344         disable pthreads
4345     fi
4346 fi
4347
4348 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4349 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4350
4351 check_lib math.h sin -lm && LIBM="-lm"
4352 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4353
4354 atan2f_args=2
4355 ldexpf_args=2
4356 powf_args=2
4357
4358 for func in $MATH_FUNCS; do
4359     eval check_mathfunc $func \${${func}_args:-1}
4360 done
4361
4362 # these are off by default, so fail if requested and not available
4363 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4364                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4365                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4366 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4367 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4368 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4369 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4370 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4371 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4372 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4373 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4374 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4375                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4376                                done || die "ERROR: libgsm not found"; }
4377 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4378 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4379 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4380 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4381 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4382 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4383 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4384 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4385                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4386 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4387 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4388 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4389 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4390 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4391 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4392 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4393 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4394 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4395 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4396 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4397 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4398     enabled libvpx_vp8_decoder && {
4399         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4400             disable libvpx_vp8_decoder;
4401     }
4402     enabled libvpx_vp8_encoder && {
4403         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4404             disable libvpx_vp8_encoder;
4405     }
4406     enabled libvpx_vp9_decoder && {
4407         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4408             disable libvpx_vp9_decoder;
4409     }
4410     enabled libvpx_vp9_encoder && {
4411         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4412             disable libvpx_vp9_encoder;
4413     }
4414     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4415         die "libvpx enabled but no supported decoders found"
4416     fi
4417 }
4418 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4419 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4420 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4421                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4422                                die "ERROR: libx264 version must be >= 0.118."; } &&
4423                              { check_cpp_condition x264.h "X264_MPEG2" &&
4424                                enable libx262; }
4425 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4426                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4427                                die "ERROR: libx265 version must be >= 57."; }
4428 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4429 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4430 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4431                                 { ! enabled cross_compile && {
4432                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4433                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4434                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4435                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4436                                die "ERROR: mmal not found"; }
4437 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4438                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4439                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4440                                die "ERROR: openssl not found"; }
4441
4442 if enabled gnutls; then
4443     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4444     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4445 fi
4446
4447 # libdc1394 check
4448 if enabled libdc1394; then
4449     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4450         enable libdc1394_2; } ||
4451     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4452         enable libdc1394_1; } ||
4453     die "ERROR: No version of libdc1394 found "
4454 fi
4455
4456 if enabled nvenc; then
4457     check_header cuda.h || die "ERROR: cuda.h not found.";
4458     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found.";
4459     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4460         die "ERROR: NVENC API version 4 or older is not supported";
4461 fi
4462
4463 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4464     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4465     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4466     enable sdl
4467 fi
4468
4469 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4470 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4471
4472 check_header linux/fb.h
4473 check_header linux/videodev2.h
4474 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4475
4476 check_header sys/videoio.h
4477
4478 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4479 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4480 # w32api 3.12 had it defined wrong
4481 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4482
4483 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4484 { check_header dev/bktr/ioctl_meteor.h &&
4485   check_header dev/bktr/ioctl_bt848.h; } ||
4486 { check_header machine/ioctl_meteor.h &&
4487   check_header machine/ioctl_bt848.h; } ||
4488 { check_header dev/video/meteor/ioctl_meteor.h &&
4489   check_header dev/video/bktr/ioctl_bt848.h; } ||
4490 check_header dev/ic/bt8xx.h
4491
4492 check_header sndio.h
4493 check_header sys/soundcard.h
4494 check_header soundcard.h
4495
4496 enabled_any alsa_indev alsa_outdev &&
4497     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4498
4499 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4500     check_func jack_port_get_latency_range -ljack
4501
4502 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4503
4504 if enabled libcdio; then
4505     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4506     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4507     die "ERROR: No usable libcdio/cdparanoia found"
4508 fi
4509
4510 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4511
4512 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4513     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4514         enabled libxcb && die "ERROR: libxcb not found";
4515     } && disable x11grab && enable libxcb
4516
4517     disabled libxcb_shm ||
4518         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4519             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4520         } && check_header sys/shm.h && enable libxcb_shm
4521
4522     disabled libxcb_xfixes ||
4523         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4524             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4525         } && enable libxcb_xfixes
4526
4527     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4528     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4529 fi
4530
4531 if enabled x11grab; then
4532     enabled xlib || die "ERROR: Xlib not found"
4533     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4534     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4535 fi
4536
4537 enabled vaapi && enabled xlib &&
4538     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4539     enable vaapi_x11
4540
4541 enabled vdpau &&
4542     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4543     disable vdpau
4544
4545 enabled vdpau && enabled xlib &&
4546     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4547     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4548     enable vdpau_x11
4549
4550 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4551
4552 # add some useful compiler flags if supported
4553 check_cflags -Wdeclaration-after-statement
4554 check_cflags -Wall
4555 check_cflags -Wdisabled-optimization
4556 check_cflags -Wpointer-arith
4557 check_cflags -Wredundant-decls
4558 check_cflags -Wcast-qual
4559 check_cflags -Wwrite-strings
4560 check_cflags -Wtype-limits
4561 check_cflags -Wundef
4562 check_cflags -Wmissing-prototypes
4563 check_cflags -Wstrict-prototypes
4564 enabled extra_warnings && check_cflags -Winline
4565
4566 check_disable_warning(){
4567     warning_flag=-W${1#-Wno-}
4568     test_cflags $warning_flag && add_cflags $1
4569 }
4570
4571 check_disable_warning -Wno-parentheses
4572 check_disable_warning -Wno-switch
4573 check_disable_warning -Wno-format-zero-length
4574 check_disable_warning -Wno-pointer-sign
4575
4576 # add some linker flags
4577 check_ldflags -Wl,--warn-common
4578 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4579 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4580 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4581
4582 # add some strip flags
4583 # -wN '..@*' is more selective than -x, but not available everywhere.
4584 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4585
4586 enabled neon_clobber_test &&
4587     check_ldflags -Wl,--wrap,avcodec_open2              \
4588                   -Wl,--wrap,avcodec_decode_audio4      \
4589                   -Wl,--wrap,avcodec_decode_video2      \
4590                   -Wl,--wrap,avcodec_decode_subtitle2   \
4591                   -Wl,--wrap,avcodec_encode_audio2      \
4592                   -Wl,--wrap,avcodec_encode_video2      \
4593                   -Wl,--wrap,avcodec_encode_subtitle    \
4594                   -Wl,--wrap,avresample_convert ||
4595     disable neon_clobber_test
4596
4597 enabled xmm_clobber_test &&
4598     check_ldflags -Wl,--wrap,avcodec_open2              \
4599                   -Wl,--wrap,avcodec_decode_audio4      \
4600                   -Wl,--wrap,avcodec_decode_video2      \
4601                   -Wl,--wrap,avcodec_decode_subtitle2   \
4602                   -Wl,--wrap,avcodec_encode_audio2      \
4603                   -Wl,--wrap,avcodec_encode_video2      \
4604                   -Wl,--wrap,avcodec_encode_subtitle    \
4605                   -Wl,--wrap,avresample_convert         \
4606                   -Wl,--wrap,sws_scale ||
4607     disable xmm_clobber_test
4608
4609 echo "X{};" > $TMPV
4610 if test_ldflags -Wl,--version-script,$TMPV; then
4611     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
4612     check_cc <<EOF && enable symver_asm_label
4613 void ff_foo(void) __asm__ ("av_foo@VERSION");
4614 void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
4615 EOF
4616     check_cc <<EOF && enable symver_gnu_asm
4617 __asm__(".symver ff_foo,av_foo@VERSION");
4618 void ff_foo(void) {}
4619 EOF
4620 fi
4621
4622 if [ -z "$optflags" ]; then
4623     if enabled small; then
4624         optflags=$cflags_size
4625     elif enabled optimizations; then
4626         optflags=$cflags_speed
4627     else
4628         optflags=$cflags_noopt
4629     fi
4630 fi
4631
4632 check_optflags(){
4633     check_cflags "$@"
4634     enabled lto && check_ldflags "$@"
4635 }
4636
4637
4638 if enabled lto; then
4639     test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
4640     check_cflags  -flto
4641     check_ldflags -flto $cpuflags
4642 fi
4643
4644 check_optflags $optflags
4645 check_optflags -fno-math-errno
4646 check_optflags -fno-signed-zeros
4647
4648 if enabled icc; then
4649     # Just warnings, no remarks
4650     check_cflags -w1
4651     # -wd: Disable following warnings
4652     # 144, 167, 556: -Wno-pointer-sign
4653     # 1292: attribute "foo" ignored
4654     # 1419: external declaration in primary source file
4655     # 10006: ignoring unknown option -fno-signed-zeros
4656     # 10148: ignoring unknown option -Wno-parentheses
4657     # 10156: ignoring option '-W'; no argument required
4658     check_cflags -wd144,167,556,1292,1419,10006,10148,10156
4659     # 11030: Warning unknown option --as-needed
4660     # 10156: ignoring option '-export'; no argument required
4661     check_ldflags -wd10156,11030
4662     # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
4663     enable ebp_available
4664     if enabled x86_32; then
4665         icc_version=$($cc -dumpversion)
4666         test ${icc_version%%.*} -ge 11 &&
4667             check_cflags -falign-stack=maintain-16-byte ||
4668             disable aligned_stack
4669     fi
4670 elif enabled ccc; then
4671     # disable some annoying warnings
4672     add_cflags -msg_disable bitnotint
4673     add_cflags -msg_disable mixfuncvoid
4674     add_cflags -msg_disable nonstandcast
4675     add_cflags -msg_disable unsupieee
4676 elif enabled gcc; then
4677     check_optflags -fno-tree-vectorize
4678     check_cflags -Werror=implicit-function-declaration
4679     check_cflags -Werror=missing-prototypes
4680     check_cflags -Werror=return-type
4681     check_cflags -Werror=declaration-after-statement
4682     check_cflags -Werror=vla
4683     check_cflags -Werror=format-security
4684     check_cflags -fdiagnostics-color=auto
4685     enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
4686 elif enabled llvm_gcc; then
4687     check_cflags -mllvm -stack-alignment=16
4688 elif enabled clang; then
4689     check_cflags -mllvm -stack-alignment=16
4690     check_cflags -Qunused-arguments
4691     check_cflags -Werror=implicit-function-declaration
4692     check_cflags -Werror=missing-prototypes
4693     check_cflags -Werror=return-type
4694 elif enabled cparser; then
4695     add_cflags -Wno-missing-variable-declarations
4696     add_cflags -Wno-empty-statement
4697 elif enabled armcc; then
4698     add_cflags -W${armcc_opt},--diag_suppress=4343 # hardfp compat
4699     add_cflags -W${armcc_opt},--diag_suppress=3036 # using . as system include dir
4700     # 2523: use of inline assembly is deprecated
4701     add_cflags -W${armcc_opt},--diag_suppress=2523
4702     add_cflags -W${armcc_opt},--diag_suppress=1207
4703     add_cflags -W${armcc_opt},--diag_suppress=1293 # assignment in condition
4704     add_cflags -W${armcc_opt},--diag_suppress=3343 # hardfp compat
4705     add_cflags -W${armcc_opt},--diag_suppress=167  # pointer sign
4706     add_cflags -W${armcc_opt},--diag_suppress=513  # pointer sign
4707 elif enabled tms470; then
4708     add_cflags -pds=824 -pds=837
4709     disable inline_asm
4710 elif enabled pathscale; then
4711     add_cflags -fstrict-overflow -OPT:wrap_around_unsafe_opt=OFF
4712 elif enabled_any msvc icl; then
4713     enabled x86_32 && disable aligned_stack
4714     enabled_all x86_32 debug && add_cflags -Oy-
4715     enabled debug && add_ldflags -debug
4716     enable pragma_deprecated
4717     if enabled icl; then
4718         # -Qansi-alias is basically -fstrict-aliasing, but does not work
4719         # (correctly) on icl 13.x.
4720         check_cpp_condition "windows.h" "__ICL < 1300 || __ICL >= 1400" &&
4721             add_cflags -Qansi-alias
4722         # icl will pass the inline asm tests but inline asm is currently
4723         # not supported (build will fail)
4724         disable inline_asm
4725     fi
4726     # msvcrt10 x64 incorrectly enables log2, only msvcrt12 (MSVC 2013) onwards actually has log2.
4727     check_cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION >= 12" || disable log2
4728     # The CRT headers contain __declspec(restrict) in a few places, but if redefining
4729     # restrict, this might break. MSVC 2010 and 2012 fail with __declspec(__restrict)
4730     # (as it ends up if the restrict redefine is done before including stdlib.h), while
4731     # MSVC 2013 and newer can handle it fine.
4732     # If this declspec fails, force including stdlib.h before the restrict redefinition
4733     # happens in config.h.
4734     if [ $_restrict != restrict ]; then
4735         check_cc <<EOF || add_cflags -FIstdlib.h
4736 __declspec($_restrict) void* foo(int);
4737 EOF
4738     fi
4739     check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4740 fi
4741
4742 for pfx in "" host_; do
4743     varname=${pfx%_}cc_type
4744     eval "type=\$$varname"
4745     if [ $type = "msvc" ]; then
4746         check_${pfx}cc <<EOF || add_${pfx}cflags -Dinline=__inline
4747 static inline int foo(int a) { return a; }
4748 EOF
4749     fi
4750 done
4751
4752 case $as_type in
4753     clang)
4754         add_asflags -Qunused-arguments
4755     ;;
4756 esac
4757
4758 case $ld_type in
4759     clang)
4760         check_ldflags -Qunused-arguments
4761     ;;
4762 esac
4763
4764 case $target_os in
4765     osf1)
4766         enabled ccc && add_ldflags '-Wl,-expect_unresolved,*'
4767     ;;
4768     plan9)
4769         add_cppflags -Dmain=plan9_main
4770     ;;
4771 esac
4772
4773 enabled asm || { arch=c; disable $ARCH_LIST $ARCH_EXT_LIST; }
4774
4775 check_deps $CONFIG_LIST       \
4776            $CONFIG_EXTRA      \
4777            $HAVE_LIST         \
4778            $ALL_COMPONENTS    \
4779
4780 enabled_all dxva2 CoTaskMemFree &&
4781     prepend avconv_libs $($ldflags_filter "-lole32") &&
4782     enable dxva2_lib
4783
4784 ! enabled_any memalign posix_memalign aligned_malloc &&
4785     enabled simd_align_16 && enable memalign_hack
4786
4787 map 'enabled $v && intrinsics=${v#intrinsics_}' $INTRINSICS_LIST
4788
4789 for thread in $THREADS_LIST; do
4790     if enabled $thread; then
4791         test -n "$thread_type" &&
4792             die "ERROR: Only one thread type must be selected." ||
4793             thread_type="$thread"
4794     fi
4795 done
4796
4797 enabled zlib && add_cppflags -DZLIB_CONST
4798
4799 # conditional library dependencies, in linking order
4800 enabled movie_filter    && prepend avfilter_deps "avformat avcodec"
4801 enabled resample_filter && prepend avfilter_deps "avresample"
4802 enabled scale_filter    && prepend avfilter_deps "swscale"
4803
4804 enabled opus_decoder