lavr: Drop deprecated context reinitialization if resampling was not enabled
[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="
1361     $ARCH_EXT_LIST_ARM
1362     $ARCH_EXT_LIST_PPC
1363     $ARCH_EXT_LIST_X86
1364     loongson
1365     vis
1366 "
1367
1368 ARCH_FEATURES="
1369     aligned_stack
1370     fast_64bit
1371     fast_clz
1372     fast_cmov
1373     local_aligned_8
1374     local_aligned_16
1375     simd_align_16
1376 "
1377
1378 BUILTIN_LIST="
1379     atomic_cas_ptr
1380     machine_rw_barrier
1381     MemoryBarrier
1382     mm_empty
1383     rdtsc
1384     sync_val_compare_and_swap
1385 "
1386 HAVE_LIST_CMDLINE="
1387     inline_asm
1388     symver
1389     yasm
1390 "
1391
1392 HAVE_LIST_PUB="
1393     bigendian
1394     fast_unaligned
1395 "
1396
1397 HEADERS_LIST="
1398     alsa_asoundlib_h
1399     altivec_h
1400     arpa_inet_h
1401     cdio_paranoia_h
1402     cdio_paranoia_paranoia_h
1403     dev_bktr_ioctl_bt848_h
1404     dev_bktr_ioctl_meteor_h
1405     dev_ic_bt8xx_h
1406     dev_video_bktr_ioctl_bt848_h
1407     dev_video_meteor_ioctl_meteor_h
1408     direct_h
1409     dlfcn_h
1410     d3d11_h
1411     dxva_h
1412     gsm_h
1413     io_h
1414     mach_mach_time_h
1415     machine_ioctl_bt848_h
1416     machine_ioctl_meteor_h
1417     malloc_h
1418     poll_h
1419     sndio_h
1420     soundcard_h
1421     sys_mman_h
1422     sys_param_h
1423     sys_resource_h
1424     sys_select_h
1425     sys_soundcard_h
1426     sys_time_h
1427     sys_un_h
1428     sys_videoio_h
1429     unistd_h
1430     valgrind_valgrind_h
1431     windows_h
1432     winsock2_h
1433 "
1434
1435 INTRINSICS_LIST="
1436     intrinsics_neon
1437 "
1438
1439 MATH_FUNCS="
1440     atanf
1441     atan2f
1442     cbrtf
1443     cosf
1444     exp2
1445     exp2f
1446     expf
1447     isinf
1448     isnan
1449     ldexpf
1450     llrint
1451     llrintf
1452     log2
1453     log2f
1454     log10f
1455     lrint
1456     lrintf
1457     powf
1458     rint
1459     round
1460     roundf
1461     sinf
1462     trunc
1463     truncf
1464 "
1465
1466 SYSTEM_FUNCS="
1467     aligned_malloc
1468     clock_gettime
1469     closesocket
1470     CommandLineToArgvW
1471     CoTaskMemFree
1472     CryptGenRandom
1473     dlopen
1474     fcntl
1475     flt_lim
1476     fork
1477     getaddrinfo
1478     gethrtime
1479     getopt
1480     GetProcessAffinityMask
1481     GetProcessMemoryInfo
1482     GetProcessTimes
1483     getrusage
1484     getservbyport
1485     GetSystemTimeAsFileTime
1486     gettimeofday
1487     gmtime_r
1488     inet_aton
1489     isatty
1490     jack_port_get_latency_range
1491     LoadLibrary
1492     localtime_r
1493     mach_absolute_time
1494     MapViewOfFile
1495     memalign
1496     mkstemp
1497     mmap
1498     mprotect
1499     nanosleep
1500     posix_memalign
1501     sched_getaffinity
1502     SetConsoleTextAttribute
1503     setmode
1504     setrlimit
1505     Sleep
1506     strerror_r
1507     sysconf
1508     sysctl
1509     usleep
1510     VirtualAlloc
1511 "
1512
1513 TOOLCHAIN_FEATURES="
1514     as_dn_directive
1515     as_func
1516     as_object_arch
1517     asm_mod_q
1518     attribute_may_alias
1519     attribute_packed
1520     ebp_available
1521     ebx_available
1522     gnu_as
1523     ibm_asm
1524     inline_asm_labels
1525     pragma_deprecated
1526     symver_asm_label
1527     symver_gnu_asm
1528     vfp_args
1529     xform_asm
1530     xmm_clobbers
1531 "
1532
1533 TYPES_LIST="
1534     CONDITION_VARIABLE_Ptr
1535     socklen_t
1536     struct_addrinfo
1537     struct_group_source_req
1538     struct_ip_mreq_source
1539     struct_ipv6_mreq
1540     struct_pollfd
1541     struct_rusage_ru_maxrss
1542     struct_sockaddr_in6
1543     struct_sockaddr_sa_len
1544     struct_sockaddr_storage
1545     struct_v4l2_frmivalenum_discrete
1546 "
1547
1548 HAVE_LIST="
1549     $ARCH_EXT_LIST
1550     $(add_suffix _external $ARCH_EXT_LIST)
1551     $(add_suffix _inline   $ARCH_EXT_LIST)
1552     $ARCH_FEATURES
1553     $ATOMICS_LIST
1554     $BUILTIN_LIST
1555     $HAVE_LIST_CMDLINE
1556     $HAVE_LIST_PUB
1557     $HEADERS_LIST
1558     $INTRINSICS_LIST
1559     $MATH_FUNCS
1560     $SYSTEM_FUNCS
1561     $THREADS_LIST
1562     $TOOLCHAIN_FEATURES
1563     $TYPES_LIST
1564     atomics_native
1565     dos_paths
1566     dxva2_lib
1567     libc_msvcrt
1568     libdc1394_1
1569     libdc1394_2
1570     sdl
1571     section_data_rel_ro
1572     threads
1573     vaapi_x11
1574     vdpau_x11
1575     xlib
1576 "
1577
1578 # options emitted with CONFIG_ prefix but not available on the command line
1579 CONFIG_EXTRA="
1580     aandcttables
1581     ac3dsp
1582     audio_frame_queue
1583     audiodsp
1584     blockdsp
1585     bswapdsp
1586     cabac
1587     dvprofile
1588     faandct
1589     faanidct
1590     fdctdsp
1591     flacdsp
1592     fmtconvert
1593     g722dsp
1594     gcrypt
1595     gmp
1596     golomb
1597     gplv3
1598     h263dsp
1599     h264chroma
1600     h264dsp
1601     h264pred
1602     h264qpel
1603     hpeldsp
1604     huffman
1605     huffyuvdsp
1606     huffyuvencdsp
1607     idctdsp
1608     iirfilter
1609     imdct15
1610     intrax8
1611     ividsp
1612     jpegtables
1613     libx262
1614     lgplv3
1615     lpc
1616     me_cmp
1617     mpeg_er
1618     mpegaudio
1619     mpegaudiodsp
1620     mpegvideo
1621     mpegvideoenc
1622     mss34dsp
1623     pixblockdsp
1624     qpeldsp
1625     qsv
1626     qsvdec
1627     qsvenc
1628     rangecoder
1629     riffdec
1630     riffenc
1631     rtpdec
1632     rtpenc_chain
1633     rv34dsp
1634     sinewin
1635     snappy
1636     startcode
1637     texturedsp
1638     texturedspenc
1639     tpeldsp
1640     videodsp
1641     vp3dsp
1642     vp56dsp
1643     vp8dsp
1644     wma_freqs
1645     wmv2dsp
1646 "
1647
1648 CMDLINE_SELECT="
1649     $ARCH_EXT_LIST
1650     $CONFIG_LIST
1651     $HAVE_LIST_CMDLINE
1652     $THREADS_LIST
1653     asm
1654     cross_compile
1655     debug
1656     extra_warnings
1657     logging
1658     lto
1659     optimizations
1660     rpath
1661 "
1662
1663 PATHS_LIST="
1664     bindir
1665     datadir
1666     docdir
1667     incdir
1668     libdir
1669     mandir
1670     prefix
1671     shlibdir
1672 "
1673
1674 CMDLINE_SET="
1675     $PATHS_LIST
1676     ar
1677     arch
1678     as
1679     build_suffix
1680     cc
1681     cpu
1682     cross_prefix
1683     dep_cc
1684     env
1685     extra_version
1686     host_cc
1687     host_cflags
1688     host_ld
1689     host_ldflags
1690     host_libs
1691     host_os
1692     ld
1693     logfile
1694     malloc_prefix
1695     nm
1696     optflags
1697     pkg_config
1698     pkg_config_flags
1699     random_seed
1700     samples
1701     sysinclude
1702     sysroot
1703     target_exec
1704     target_os
1705     target_path
1706     target_samples
1707     toolchain
1708 "
1709
1710 CMDLINE_APPEND="
1711     extra_cflags
1712     host_cppflags
1713 "
1714
1715 # code dependency declarations
1716
1717 # architecture extensions
1718
1719 armv5te_deps="arm"
1720 armv6_deps="arm"
1721 armv6t2_deps="arm"
1722 armv8_deps="aarch64"
1723 neon_deps_any="aarch64 arm"
1724 intrinsics_neon_deps="neon"
1725 vfp_deps_any="aarch64 arm"
1726 vfpv3_deps="vfp"
1727
1728 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1729
1730 altivec_deps="ppc"
1731 ppc4xx_deps="ppc"
1732 vsx_deps="altivec"
1733 power8_deps="vsx"
1734
1735 cpunop_deps="i686"
1736 x86_64_select="i686"
1737 x86_64_suggest="fast_cmov"
1738
1739 amd3dnow_deps="mmx"
1740 amd3dnowext_deps="amd3dnow"
1741 i686_deps="x86"
1742 mmx_deps="x86"
1743 mmxext_deps="mmx"
1744 sse_deps="mmxext"
1745 sse2_deps="sse"
1746 sse3_deps="sse2"
1747 ssse3_deps="sse3"
1748 sse4_deps="ssse3"
1749 sse42_deps="sse4"
1750 avx_deps="sse42"
1751 xop_deps="avx"
1752 fma3_deps="avx"
1753 fma4_deps="avx"
1754 avx2_deps="avx"
1755
1756 mmx_external_deps="yasm"
1757 mmx_inline_deps="inline_asm"
1758 mmx_suggest="mmx_external mmx_inline"
1759
1760 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1761     eval dep=\$${ext}_deps
1762     eval ${ext}_external_deps='"${dep}_external"'
1763     eval ${ext}_inline_deps='"${dep}_inline"'
1764     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1765 done
1766
1767 aligned_stack_if_any="aarch64 ppc x86"
1768 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1769 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1770 fast_unaligned_if_any="aarch64 ppc x86"
1771 simd_align_16_if_any="altivec neon sse"
1772
1773 # system capabilities
1774 symver_if_any="symver_asm_label symver_gnu_asm"
1775 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1776
1777 # threading support
1778 atomics_gcc_if="sync_val_compare_and_swap"
1779 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1780 atomics_win32_if="MemoryBarrier"
1781 atomics_native_if_any="$ATOMICS_LIST"
1782 w32threads_deps="atomics_native"
1783 threads_if_any="$THREADS_LIST"
1784
1785 # subsystems
1786 dct_select="rdft"
1787 error_resilience_select="me_cmp"
1788 faandct_deps="faan fdctdsp"
1789 faanidct_deps="faan idctdsp"
1790 intrax8_select="error_resilience"
1791 mdct_select="fft"
1792 rdft_select="fft"
1793 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1794 mpeg_er_select="error_resilience"
1795 mpegaudio_select="mpegaudiodsp"
1796 mpegaudiodsp_select="dct"
1797 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1798 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1799 nvenc_deps_any="dlopen LoadLibrary"
1800 nvenc_extralibs='$ldl'
1801 qsvdec_select="qsv"
1802 qsvenc_select="qsv"
1803
1804 # decoders / encoders
1805 aac_decoder_select="imdct15 mdct sinewin"
1806 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1807 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1808 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1809 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1810 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1811 adpcm_g722_decoder_select="g722dsp"
1812 adpcm_g722_encoder_select="g722dsp"
1813 aic_decoder_select="golomb idctdsp"
1814 alac_encoder_select="lpc"
1815 als_decoder_select="bswapdsp"
1816 amrnb_decoder_select="lsp"
1817 amrwb_decoder_select="lsp"
1818 amv_decoder_select="sp5x_decoder"
1819 ape_decoder_select="bswapdsp"
1820 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1821 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1822 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1823 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1824 atrac1_decoder_select="mdct sinewin"
1825 atrac3_decoder_select="mdct"
1826 atrac3p_decoder_select="mdct sinewin"
1827 bink_decoder_select="blockdsp hpeldsp"
1828 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1829 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1830 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1831 cllc_decoder_select="bswapdsp"
1832 comfortnoise_encoder_select="lpc"
1833 cook_decoder_select="audiodsp mdct sinewin"
1834 cscd_decoder_select="lzo"
1835 cscd_decoder_suggest="zlib"
1836 dca_decoder_select="fmtconvert mdct"
1837 dds_decoder_select="texturedsp"
1838 dnxhd_decoder_select="blockdsp idctdsp"
1839 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1840 dvvideo_decoder_select="dvprofile idctdsp"
1841 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1842 dxa_decoder_deps="zlib"
1843 eac3_decoder_select="ac3_decoder"
1844 eac3_encoder_select="ac3_encoder"
1845 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1846 eatgq_decoder_select="aandcttables idctdsp"
1847 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
1848 exr_decoder_deps="zlib"
1849 ffv1_decoder_select="golomb rangecoder"
1850 ffv1_encoder_select="rangecoder"
1851 ffvhuff_decoder_select="huffyuv_decoder"
1852 ffvhuff_encoder_select="huffyuv_encoder"
1853 fic_decoder_select="golomb"
1854 flac_decoder_select="flacdsp golomb"
1855 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1856 flashsv_decoder_deps="zlib"
1857 flashsv_encoder_deps="zlib"
1858 flashsv2_decoder_deps="zlib"
1859 flv_decoder_select="h263_decoder"
1860 flv_encoder_select="h263_encoder"
1861 fourxm_decoder_select="blockdsp bswapdsp"
1862 fraps_decoder_select="bswapdsp huffman"
1863 g2m_decoder_deps="zlib"
1864 g2m_decoder_select="blockdsp idctdsp jpegtables"
1865 h261_decoder_select="mpeg_er mpegvideo"
1866 h261_encoder_select="aandcttables mpegvideoenc"
1867 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1868 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1869 h263i_decoder_select="h263_decoder"
1870 h263p_encoder_select="h263_encoder"
1871 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1872 h264_decoder_suggest="error_resilience"
1873 h264_nvenc_encoder_deps="nvenc"
1874 h264_qsv_decoder_deps="libmfx"
1875 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1876 h264_qsv_encoder_deps="libmfx"
1877 h264_qsv_encoder_select="qsvenc"
1878 hap_decoder_select="snappy texturedsp"
1879 hap_encoder_deps="libsnappy"
1880 hap_encoder_select="texturedspenc"
1881 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1882 hevc_nvenc_encoder_deps="nvenc"
1883 hevc_qsv_encoder_deps="libmfx"
1884 hevc_qsv_decoder_deps="libmfx"
1885 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1886 hevc_qsv_encoder_select="qsvenc"
1887 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1888 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1889 iac_decoder_select="imc_decoder"
1890 imc_decoder_select="bswapdsp fft mdct sinewin"
1891 indeo3_decoder_select="hpeldsp"
1892 indeo4_decoder_select="ividsp"
1893 indeo5_decoder_select="ividsp"
1894 interplay_video_decoder_select="hpeldsp"
1895 jpegls_decoder_select="golomb mjpeg_decoder"
1896 jpegls_encoder_select="golomb"
1897 jv_decoder_select="blockdsp"
1898 lagarith_decoder_select="huffyuvdsp"
1899 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1900 loco_decoder_select="golomb"
1901 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1902 metasound_decoder_select="lsp mdct sinewin"
1903 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1904 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1905 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1906 mjpegb_decoder_select="mjpeg_decoder"
1907 mlp_decoder_select="mlp_parser"
1908 motionpixels_decoder_select="bswapdsp"
1909 mp1_decoder_select="mpegaudio"
1910 mp1float_decoder_select="mpegaudio"
1911 mp2_decoder_select="mpegaudio"
1912 mp2float_decoder_select="mpegaudio"
1913 mp3_decoder_select="mpegaudio"
1914 mp3adu_decoder_select="mpegaudio"
1915 mp3adufloat_decoder_select="mpegaudio"
1916 mp3float_decoder_select="mpegaudio"
1917 mp3on4_decoder_select="mpegaudio"
1918 mp3on4float_decoder_select="mpegaudio"
1919 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1920 mpc8_decoder_select="mpegaudiodsp"
1921 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1922 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1923 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
1924 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1925 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
1926 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1927 mpeg2_qsv_decoder_deps="libmfx"
1928 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
1929 mpeg2_qsv_encoder_deps="libmfx"
1930 mpeg2_qsv_encoder_select="qsvenc"
1931 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1932 mpeg4_encoder_select="h263_encoder"
1933 msa1_decoder_select="mss34dsp"
1934 msmpeg4v1_decoder_select="h263_decoder"
1935 msmpeg4v2_decoder_select="h263_decoder"
1936 msmpeg4v2_encoder_select="h263_encoder"
1937 msmpeg4v3_decoder_select="h263_decoder"
1938 msmpeg4v3_encoder_select="h263_encoder"
1939 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
1940 mts2_decoder_select="mss34dsp"
1941 mxpeg_decoder_select="mjpeg_decoder"
1942 nellymoser_decoder_select="mdct sinewin"
1943 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1944 nuv_decoder_select="idctdsp lzo"
1945 on2avc_decoder_select="mdct"
1946 opus_decoder_deps="avresample"
1947 opus_decoder_select="imdct15"
1948 png_decoder_deps="zlib"
1949 png_encoder_deps="zlib"
1950 png_encoder_select="huffyuvencdsp"
1951 prores_decoder_select="idctdsp"
1952 prores_encoder_select="fdctdsp"
1953 qcelp_decoder_select="lsp"
1954 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1955 ra_144_encoder_select="audio_frame_queue lpc"
1956 ralf_decoder_select="golomb"
1957 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
1958 rv10_encoder_select="h263_encoder"
1959 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
1960 rv20_encoder_select="h263_encoder"
1961 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
1962 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
1963 shorten_decoder_select="golomb"
1964 sipr_decoder_select="lsp"
1965 sp5x_decoder_select="mjpeg_decoder"
1966 svq1_decoder_select="hpeldsp"
1967 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
1968 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
1969 svq3_decoder_suggest="zlib"
1970 tak_decoder_select="audiodsp"
1971 tdsc_decoder_deps="zlib"
1972 tdsc_decoder_select="mjpeg_decoder"
1973 theora_decoder_select="vp3_decoder"
1974 thp_decoder_select="mjpeg_decoder"
1975 tiff_decoder_suggest="zlib"
1976 tiff_encoder_suggest="zlib"
1977 truehd_decoder_select="mlp_decoder"
1978 truemotion2_decoder_select="bswapdsp"
1979 truespeech_decoder_select="bswapdsp"
1980 tscc_decoder_deps="zlib"
1981 txd_decoder_select="texturedsp"
1982 twinvq_decoder_select="mdct lsp sinewin"
1983 utvideo_decoder_select="bswapdsp"
1984 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
1985 vble_decoder_select="huffyuvdsp"
1986 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
1987 vc1image_decoder_select="vc1_decoder"
1988 vorbis_decoder_select="mdct"
1989 vorbis_encoder_select="mdct"
1990 vp3_decoder_select="hpeldsp vp3dsp videodsp"
1991 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
1992 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
1993 vp6a_decoder_select="vp6_decoder"
1994 vp6f_decoder_select="vp6_decoder"
1995 vp7_decoder_select="h264pred videodsp vp8dsp"
1996 vp8_decoder_select="h264pred videodsp vp8dsp"
1997 vp9_decoder_select="videodsp"
1998 webp_decoder_select="vp8_decoder"
1999 wmapro_decoder_select="mdct sinewin wma_freqs"
2000 wmav1_decoder_select="mdct sinewin wma_freqs"
2001 wmav1_encoder_select="mdct sinewin wma_freqs"
2002 wmav2_decoder_select="mdct sinewin wma_freqs"
2003 wmav2_encoder_select="mdct sinewin wma_freqs"
2004 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2005 wmv1_decoder_select="h263_decoder"
2006 wmv1_encoder_select="h263_encoder"
2007 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2008 wmv2_encoder_select="h263_encoder wmv2dsp"
2009 wmv3_decoder_select="vc1_decoder"
2010 wmv3image_decoder_select="wmv3_decoder"
2011 zerocodec_decoder_deps="zlib"
2012 zlib_decoder_deps="zlib"
2013 zlib_encoder_deps="zlib"
2014 zmbv_decoder_deps="zlib"
2015 zmbv_encoder_deps="zlib"
2016
2017 # hardware accelerators
2018 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2019 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2020 vaapi_deps="va_va_h"
2021 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2022 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2023 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2024
2025 h263_vaapi_hwaccel_deps="vaapi"
2026 h263_vaapi_hwaccel_select="h263_decoder"
2027 h263_vdpau_hwaccel_deps="vdpau"
2028 h263_vdpau_hwaccel_select="h263_decoder"
2029 h264_d3d11va_hwaccel_deps="d3d11va"
2030 h264_d3d11va_hwaccel_select="h264_decoder"
2031 h264_dxva2_hwaccel_deps="dxva2"
2032 h264_dxva2_hwaccel_select="h264_decoder"
2033 h264_mmal_decoder_deps="mmal"
2034 h264_mmal_hwaccel_deps="mmal"
2035 h264_mmal_decoder_select="h264_decoder"
2036 h264_mmal_encoder_deps="mmal"
2037 h264_qsv_hwaccel_deps="libmfx"
2038 h264_vaapi_hwaccel_deps="vaapi"
2039 h264_vaapi_hwaccel_select="h264_decoder"
2040 h264_vda_hwaccel_deps="vda"
2041 h264_vda_hwaccel_select="h264_decoder"
2042 h264_vda_old_hwaccel_deps="vda"
2043 h264_vda_old_hwaccel_select="h264_decoder"
2044 h264_vdpau_hwaccel_deps="vdpau"
2045 h264_vdpau_hwaccel_select="h264_decoder"
2046 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2047 hevc_d3d11va_hwaccel_select="hevc_decoder"
2048 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2049 hevc_dxva2_hwaccel_select="hevc_decoder"
2050 hevc_qsv_hwaccel_deps="libmfx"
2051 mpeg1_vdpau_hwaccel_deps="vdpau"
2052 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2053 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2054 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2055 mpeg2_dxva2_hwaccel_deps="dxva2"
2056 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2057 mpeg2_qsv_hwaccel_deps="libmfx"
2058 mpeg2_vaapi_hwaccel_deps="vaapi"
2059 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2060 mpeg2_vdpau_hwaccel_deps="vdpau"
2061 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2062 mpeg4_vaapi_hwaccel_deps="vaapi"
2063 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2064 mpeg4_vdpau_hwaccel_deps="vdpau"
2065 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2066 vc1_d3d11va_hwaccel_deps="d3d11va"
2067 vc1_d3d11va_hwaccel_select="vc1_decoder"
2068 vc1_dxva2_hwaccel_deps="dxva2"
2069 vc1_dxva2_hwaccel_select="vc1_decoder"
2070 vc1_vaapi_hwaccel_deps="vaapi"
2071 vc1_vaapi_hwaccel_select="vc1_decoder"
2072 vc1_vdpau_hwaccel_deps="vdpau"
2073 vc1_vdpau_hwaccel_select="vc1_decoder"
2074 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2075 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2076 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2077 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2078
2079 # parsers
2080 h264_parser_select="h264_decoder"
2081 hevc_parser_select="golomb"
2082 mpegvideo_parser_select="mpegvideo"
2083 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2084 vc1_parser_select="mpegvideo startcode vc1_decoder"
2085
2086 # bitstream_filters
2087 mjpeg2jpeg_bsf_select="jpegtables"
2088
2089 # external libraries
2090 libdcadec_decoder_deps="libdcadec"
2091 libfaac_encoder_deps="libfaac"
2092 libfaac_encoder_select="audio_frame_queue"
2093 libfdk_aac_decoder_deps="libfdk_aac"
2094 libfdk_aac_encoder_deps="libfdk_aac"
2095 libfdk_aac_encoder_select="audio_frame_queue"
2096 libgsm_decoder_deps="libgsm"
2097 libgsm_encoder_deps="libgsm"
2098 libgsm_ms_decoder_deps="libgsm"
2099 libgsm_ms_encoder_deps="libgsm"
2100 libilbc_decoder_deps="libilbc"
2101 libilbc_encoder_deps="libilbc"
2102 libmp3lame_encoder_deps="libmp3lame"
2103 libmp3lame_encoder_select="audio_frame_queue"
2104 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2105 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2106 libopencore_amrnb_encoder_select="audio_frame_queue"
2107 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2108 libopenh264_encoder_deps="libopenh264"
2109 libopenjpeg_decoder_deps="libopenjpeg"
2110 libopenjpeg_encoder_deps="libopenjpeg"
2111 libopus_decoder_deps="libopus"
2112 libopus_encoder_deps="libopus"
2113 libopus_encoder_select="audio_frame_queue"
2114 libschroedinger_decoder_deps="libschroedinger"
2115 libschroedinger_encoder_deps="libschroedinger"
2116 libspeex_decoder_deps="libspeex"
2117 libspeex_encoder_deps="libspeex"
2118 libspeex_encoder_select="audio_frame_queue"
2119 libtheora_encoder_deps="libtheora"
2120 libtwolame_encoder_deps="libtwolame"
2121 libvo_aacenc_encoder_deps="libvo_aacenc"
2122 libvo_aacenc_encoder_select="audio_frame_queue"
2123 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2124 libvorbis_encoder_deps="libvorbis"
2125 libvorbis_encoder_select="audio_frame_queue"
2126 libvpx_vp8_decoder_deps="libvpx"
2127 libvpx_vp8_encoder_deps="libvpx"
2128 libvpx_vp9_decoder_deps="libvpx"
2129 libvpx_vp9_encoder_deps="libvpx"
2130 libwavpack_encoder_deps="libwavpack"
2131 libwebp_encoder_deps="libwebp"
2132 libx262_encoder_deps="libx262"
2133 libx264_encoder_deps="libx264"
2134 libx265_encoder_deps="libx265"
2135 libxavs_encoder_deps="libxavs"
2136 libxvid_encoder_deps="libxvid"
2137
2138 # demuxers / muxers
2139 ac3_demuxer_select="ac3_parser"
2140 asf_demuxer_select="riffdec"
2141 asf_muxer_select="riffenc"
2142 asf_stream_muxer_select="asf_muxer"
2143 avi_demuxer_select="riffdec"
2144 avi_muxer_select="riffenc"
2145 avisynth_demuxer_deps="avisynth"
2146 avisynth_demuxer_select="riffdec"
2147 caf_demuxer_select="riffdec"
2148 dash_muxer_select="mp4_muxer"
2149 dirac_demuxer_select="dirac_parser"
2150 dv_demuxer_select="dvprofile"
2151 dv_muxer_select="dvprofile"
2152 dxa_demuxer_select="riffdec"
2153 eac3_demuxer_select="ac3_parser"
2154 f4v_muxer_select="mov_muxer"
2155 flac_demuxer_select="flac_parser"
2156 hds_muxer_select="flv_muxer"
2157 hls_muxer_select="mpegts_muxer"
2158 ipod_muxer_select="mov_muxer"
2159 ismv_muxer_select="mov_muxer"
2160 matroska_audio_muxer_select="matroska_muxer"
2161 matroska_demuxer_select="riffdec"
2162 matroska_demuxer_suggest="bzlib lzo zlib"
2163 matroska_muxer_select="riffenc"
2164 mmf_muxer_select="riffenc"
2165 mov_demuxer_select="riffdec"
2166 mov_demuxer_suggest="zlib"
2167 mov_muxer_select="riffenc rtpenc_chain"
2168 mp3_demuxer_select="mpegaudio_parser"
2169 mp4_muxer_select="mov_muxer"
2170 mpegts_muxer_select="adts_muxer latm_muxer"
2171 mpegtsraw_demuxer_select="mpegts_demuxer"
2172 mxf_d10_muxer_select="mxf_muxer"
2173 nut_muxer_select="riffenc"
2174 nuv_demuxer_select="riffdec"
2175 oga_muxer_select="ogg_muxer"
2176 ogg_demuxer_select="golomb"
2177 opus_muxer_select="ogg_muxer"
2178 psp_muxer_select="mov_muxer"
2179 rtp_demuxer_select="sdp_demuxer"
2180 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2181 rtsp_demuxer_select="http_protocol rtpdec"
2182 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2183 sap_demuxer_select="sdp_demuxer"
2184 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2185 sdp_demuxer_select="rtpdec"
2186 smoothstreaming_muxer_select="ismv_muxer"
2187 spdif_muxer_select="aac_parser"
2188 spx_muxer_select="ogg_muxer"
2189 tak_demuxer_select="tak_parser"
2190 tg2_muxer_select="mov_muxer"
2191 tgp_muxer_select="mov_muxer"
2192 w64_demuxer_select="wav_demuxer"
2193 wav_demuxer_select="riffdec"
2194 wav_muxer_select="riffenc"
2195 webm_muxer_select="riffenc"
2196 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2197 wtv_demuxer_select="riffdec"
2198 xmv_demuxer_select="riffdec"
2199 xwma_demuxer_select="riffdec"
2200
2201 # indevs / outdevs
2202 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2203 alsa_outdev_deps="alsa_asoundlib_h"
2204 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2205 dv1394_indev_deps="dv1394"
2206 dv1394_indev_select="dv_demuxer"
2207 fbdev_indev_deps="linux_fb_h"
2208 jack_indev_deps="jack_jack_h pthreads"
2209 libcdio_indev_deps="libcdio"
2210 libdc1394_indev_deps="libdc1394"
2211 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2212 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2213 pulse_indev_deps="libpulse"
2214 sndio_indev_deps="sndio_h"
2215 sndio_outdev_deps="sndio_h"
2216 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2217 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2218 vfwcap_indev_extralibs="-lavicap32"
2219 x11grab_indev_deps="x11grab"
2220 x11grab_xcb_indev_deps="libxcb"
2221
2222 # protocols
2223 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2224 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2225 ffrtmpcrypt_protocol_select="tcp_protocol"
2226 ffrtmphttp_protocol_deps="!librtmp_protocol"
2227 ffrtmphttp_protocol_select="http_protocol"
2228 gopher_protocol_select="network"
2229 http_protocol_select="tcp_protocol"
2230 httpproxy_protocol_select="tcp_protocol"
2231 https_protocol_select="tls_protocol"
2232 icecast_protocol_select="http_protocol"
2233 librtmp_protocol_deps="librtmp"
2234 librtmpe_protocol_deps="librtmp"
2235 librtmps_protocol_deps="librtmp"
2236 librtmpt_protocol_deps="librtmp"
2237 librtmpte_protocol_deps="librtmp"
2238 mmsh_protocol_select="http_protocol"
2239 mmst_protocol_select="network"
2240 rtmp_protocol_deps="!librtmp_protocol"
2241 rtmp_protocol_select="tcp_protocol"
2242 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2243 rtmps_protocol_deps="!librtmp_protocol"
2244 rtmps_protocol_select="tls_protocol"
2245 rtmpt_protocol_select="ffrtmphttp_protocol"
2246 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2247 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2248 rtp_protocol_select="udp_protocol"
2249 sctp_protocol_deps="struct_sctp_event_subscribe"
2250 sctp_protocol_select="network"
2251 srtp_protocol_select="rtp_protocol"
2252 tcp_protocol_select="network"
2253 tls_gnutls_protocol_deps="gnutls"
2254 tls_gnutls_protocol_select="tcp_protocol"
2255 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2256 tls_openssl_protocol_select="tcp_protocol"
2257 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2258 udp_protocol_select="network"
2259 unix_protocol_deps="sys_un_h"
2260 unix_protocol_select="network"
2261
2262 # filters
2263 blackframe_filter_deps="gpl"
2264 boxblur_filter_deps="gpl"
2265 bs2b_filter_deps="libbs2b"
2266 cropdetect_filter_deps="gpl"
2267 delogo_filter_deps="gpl"
2268 drawtext_filter_deps="libfreetype"
2269 frei0r_filter_deps="frei0r dlopen"
2270 frei0r_filter_extralibs='$ldl'
2271 frei0r_src_filter_deps="frei0r dlopen"
2272 frei0r_src_filter_extralibs='$ldl'
2273 hqdn3d_filter_deps="gpl"
2274 interlace_filter_deps="gpl"
2275 ocv_filter_deps="libopencv"
2276 resample_filter_deps="avresample"
2277 scale_filter_deps="swscale"
2278
2279 # examples
2280 avcodec_example_deps="avcodec avutil"
2281 filter_audio_example_deps="avfilter avutil"
2282 metadata_example_deps="avformat avutil"
2283 output_example_deps="avcodec avformat avutil swscale"
2284 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2285 transcode_aac_example_deps="avcodec avformat avresample"
2286
2287 # libraries, in linking order
2288 avcodec_deps="avutil"
2289 avdevice_deps="avformat avcodec avutil"
2290 avfilter_deps="avutil"
2291 avformat_deps="avcodec avutil"
2292 avresample_deps="avutil"
2293 swscale_deps="avutil"
2294
2295 # programs
2296 avconv_deps="avcodec avfilter avformat avresample swscale"
2297 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2298                fps_filter null_filter resample_filter scale_filter
2299                setpts_filter trim_filter"
2300 avplay_deps="avcodec avformat avresample swscale sdl"
2301 avplay_libs='$sdl_libs'
2302 avplay_select="rdft transpose_filter hflip_filter vflip_filter"
2303 avprobe_deps="avcodec avformat"
2304
2305 # documentation
2306 pod2man_deps="doc"
2307 texi2html_deps="doc"
2308
2309 # default parameters
2310
2311 logfile="config.log"
2312
2313 # installation paths
2314 prefix_default="/usr/local"
2315 bindir_default='${prefix}/bin'
2316 datadir_default='${prefix}/share/avconv'
2317 docdir_default='${prefix}/share/doc/libav'
2318 incdir_default='${prefix}/include'
2319 libdir_default='${prefix}/lib'
2320 mandir_default='${prefix}/share/man'
2321 shlibdir_default="$libdir_default"
2322
2323 # toolchain
2324 ar_default="ar"
2325 cc_default="gcc"
2326 host_cc_default="gcc"
2327 cp_f="cp -f"
2328 ln_s="ln -s -f"
2329 nm_default="nm -g"
2330 objformat="elf"
2331 pkg_config_default=pkg-config
2332 ranlib="ranlib"
2333 strip="strip"
2334 yasmexe="yasm"
2335
2336 # machine
2337 arch_default=$(uname -m)
2338 cpu="generic"
2339 intrinsics="none"
2340
2341 # OS
2342 target_os_default=$(tolower $(uname -s))
2343 host_os=$target_os_default
2344
2345 # configurable options
2346 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2347
2348 enable asm
2349 enable debug
2350 enable doc
2351 enable faan faandct faanidct
2352 enable optimizations
2353 enable safe_bitstream_reader
2354 enable static
2355 enable swscale_alpha
2356 enable valgrind_backtrace
2357
2358 # By default, enable only those hwaccels that have no external dependencies.
2359 enable d3d11va dxva2 vda vdpau
2360
2361 # build settings
2362 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2363 LIBPREF="lib"
2364 LIBSUF=".a"
2365 FULLNAME='$(NAME)$(BUILDSUF)'
2366 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2367 SLIBPREF="lib"
2368 SLIBSUF=".so"
2369 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2370 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2371 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2372 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2373 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2374 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2375
2376 asflags_filter=echo
2377 cflags_filter=echo
2378 ldflags_filter=echo
2379
2380 AS_C='-c'
2381 AS_O='-o $@'
2382 CC_C='-c'
2383 CC_E='-E -o $@'
2384 CC_O='-o $@'
2385 LD_O='-o $@'
2386 LD_LIB='-l%'
2387 LD_PATH='-L'
2388 HOSTCC_C='-c'
2389 HOSTCC_E='-E -o $@'
2390 HOSTCC_O='-o $@'
2391 HOSTLD_O='-o $@'
2392
2393 host_libs='-lm'
2394 host_cflags_filter=echo
2395 host_ldflags_filter=echo
2396
2397 target_path='$(CURDIR)'
2398
2399 # since the object filename is not given with the -MM flag, the compiler
2400 # is only able to print the basename, and we must add the path ourselves
2401 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2402 DEPFLAGS='-MM'
2403
2404 # find source path
2405 if test -f configure; then
2406     source_path=.
2407 else
2408     source_path=$(cd $(dirname "$0"); pwd)
2409     echo "$source_path" | grep -q '[[:blank:]]' &&
2410         die "Out of tree builds are impossible with whitespace in source path."
2411     test -e "$source_path/config.h" &&
2412         die "Out of tree builds are impossible with config.h in source dir."
2413 fi
2414
2415 for v in "$@"; do
2416     r=${v#*=}
2417     l=${v%"$r"}
2418     r=$(sh_quote "$r")
2419     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2420 done
2421
2422 find_things(){
2423     thing=$1
2424     pattern=$2
2425     file=$source_path/$3
2426     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2427 }
2428
2429 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2430 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2431 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2432 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2433 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2434 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2435 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2436 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2437 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2438 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2439 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2440
2441 ALL_COMPONENTS="
2442     $BSF_LIST
2443     $DECODER_LIST
2444     $DEMUXER_LIST
2445     $ENCODER_LIST
2446     $FILTER_LIST
2447     $HWACCEL_LIST
2448     $INDEV_LIST
2449     $MUXER_LIST
2450     $OUTDEV_LIST
2451     $PARSER_LIST
2452     $PROTOCOL_LIST
2453 "
2454
2455 for n in $COMPONENT_LIST; do
2456     v=$(toupper ${n%s})_LIST
2457     eval enable \$$v
2458     eval ${n}_if_any="\$$v"
2459 done
2460
2461 enable $ARCH_EXT_LIST
2462
2463 die_unknown(){
2464     echo "Unknown option \"$1\"."
2465     echo "See $0 --help for available options."
2466     exit 1
2467 }
2468
2469 print_3_columns() {
2470     cat | tr ' ' '\n' | sort | pr -r -3 -t
2471 }
2472
2473 show_list() {
2474     suffix=_$1
2475     shift
2476     echo $* | sed s/$suffix//g | print_3_columns
2477     exit 0
2478 }
2479
2480 rand_list(){
2481     IFS=', '
2482     set -- $*
2483     unset IFS
2484     for thing; do
2485         comp=${thing%:*}
2486         prob=${thing#$comp}
2487         prob=${prob#:}
2488         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2489         echo "prob ${prob:-0.5}"
2490         printf '%s\n' $comp
2491     done
2492 }
2493
2494 do_random(){
2495     action=$1
2496     shift
2497     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2498     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2499 }
2500
2501 for opt do
2502     optval="${opt#*=}"
2503     case "$opt" in
2504         --extra-ldflags=*)
2505             add_ldflags $optval
2506         ;;
2507         --extra-ldexeflags=*)
2508             add_ldexeflags $optval
2509         ;;
2510         --extra-libs=*)
2511             add_extralibs $optval
2512         ;;
2513         --disable-devices)
2514             disable $INDEV_LIST $OUTDEV_LIST
2515         ;;
2516         --enable-debug=*)
2517             debuglevel="$optval"
2518         ;;
2519         --disable-programs)
2520             disable $PROGRAM_LIST
2521         ;;
2522         --disable-everything)
2523             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2524         ;;
2525         --disable-all)
2526             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2527             disable $LIBRARY_LIST $PROGRAM_LIST doc
2528         ;;
2529         --enable-random|--disable-random)
2530             action=${opt%%-random}
2531             do_random ${action#--} $COMPONENT_LIST
2532         ;;
2533         --enable-random=*|--disable-random=*)
2534             action=${opt%%-random=*}
2535             do_random ${action#--} $optval
2536         ;;
2537         --enable-*=*|--disable-*=*)
2538             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2539             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2540             eval list=\$$(toupper $thing)_LIST
2541             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2542             $action $(filter "$name" $list)
2543         ;;
2544         --enable-avserver|--disable-avserver*)
2545             warn "avserver has been removed, the ${opt} option is only"\
2546                  "provided for compatibility and will be removed in the future"
2547         ;;
2548         --enable-?*|--disable-?*)
2549             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2550             if is_in $option $COMPONENT_LIST; then
2551                 test $action = disable && action=unset
2552                 eval $action \$$(toupper ${option%s})_LIST
2553             elif is_in $option $CMDLINE_SELECT; then
2554                 $action $option
2555             else
2556                 die_unknown $opt
2557             fi
2558         ;;
2559         --list-*)
2560             NAME="${opt#--list-}"
2561             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2562             NAME=${NAME%s}
2563             eval show_list $NAME \$$(toupper $NAME)_LIST
2564         ;;
2565         --help|-h) show_help
2566         ;;
2567         *)
2568             optname="${opt%%=*}"
2569             optname="${optname#--}"
2570             optname=$(echo "$optname" | sed 's/-/_/g')
2571             if is_in $optname $CMDLINE_SET; then
2572                 eval $optname='$optval'
2573             elif is_in $optname $CMDLINE_APPEND; then
2574                 append $optname "$optval"
2575             else
2576                 die_unknown $opt
2577             fi
2578         ;;
2579     esac
2580 done
2581
2582 for e in $env; do
2583     eval "export $e"
2584 done
2585
2586 disabled logging && logfile=/dev/null
2587
2588 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2589 set >> $logfile
2590
2591 case "$toolchain" in
2592     clang-asan)
2593         cc_default="clang"
2594         add_cflags  -fsanitize=address
2595         add_ldflags -fsanitize=address
2596     ;;
2597     clang-tsan)
2598         cc_default="clang"
2599         add_cflags  -fsanitize=thread -pie
2600         add_ldflags -fsanitize=thread -pie
2601     ;;
2602     clang-usan)
2603         cc_default="clang"
2604         add_cflags  -fsanitize=undefined -O1
2605         add_ldflags -fsanitize=undefined
2606     ;;
2607     gcc-asan)
2608         cc_default="gcc"
2609         add_cflags  -fsanitize=address
2610         add_ldflags -fsanitize=address
2611     ;;
2612     gcc-tsan)
2613         cc_default="gcc"
2614         add_cflags  -fsanitize=thread -pie -fPIC
2615         add_ldflags -fsanitize=thread -pie -fPIC
2616     ;;
2617     gcc-usan)
2618         cc_default="gcc"
2619         add_cflags  -fsanitize=undefined
2620         add_ldflags -fsanitize=undefined
2621     ;;
2622     valgrind-massif)
2623         target_exec_default="valgrind"
2624         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2625     ;;
2626     valgrind-memcheck)
2627         target_exec_default="valgrind"
2628         target_exec_args="--track-origins=yes --leak-check=full"
2629     ;;
2630     msvc)
2631         # Check whether the current MSVC version needs the C99 converter.
2632         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2633         # support enough of C99 to build libav. Default to the new
2634         # behaviour if the regexp was unable to match anything, since this
2635         # successfully parses the version number of existing supported
2636         # versions that require the converter (MSVC 2010 and 2012).
2637         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2638         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2639             cc_default="cl"
2640         else
2641             cc_default="c99wrap cl"
2642         fi
2643         ld_default="$source_path/compat/windows/mslink"
2644         nm_default="dumpbin -symbols"
2645         ar_default="lib"
2646         case "$arch" in
2647         arm*)
2648             as_default="armasm"
2649             ;;
2650         esac
2651         target_os_default="win32"
2652         # Use a relative path for TMPDIR. This makes sure all the
2653         # ffconf temp files are written with a relative path, avoiding
2654         # issues with msys/win32 path conversion for MSVC parameters
2655         # such as -Fo<file> or -out:<file>.
2656         TMPDIR=.
2657     ;;
2658     icl)
2659         cc_default="icl"
2660         ld_default="xilink"
2661         nm_default="dumpbin -symbols"
2662         ar_default="xilib"
2663         target_os_default="win32"
2664         TMPDIR=.
2665     ;;
2666     gcov)
2667         add_cflags  -fprofile-arcs -ftest-coverage
2668         add_ldflags -fprofile-arcs -ftest-coverage
2669     ;;
2670     hardened)
2671         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2672         add_cflags   -fno-strict-overflow -fstack-protector-all
2673         add_ldflags  -Wl,-z,relro -Wl,-z,now
2674     ;;
2675     ?*)
2676         die "Unknown toolchain $toolchain"
2677     ;;
2678 esac
2679
2680 test -n "$cross_prefix" && enable cross_compile
2681
2682 if enabled cross_compile; then
2683     test -n "$arch" && test -n "$target_os" ||
2684         die "Must specify target arch and OS when cross-compiling"
2685 fi
2686
2687 ar_default="${cross_prefix}${ar_default}"
2688 cc_default="${cross_prefix}${cc_default}"
2689 nm_default="${cross_prefix}${nm_default}"
2690 pkg_config_default="${cross_prefix}${pkg_config_default}"
2691 ranlib="${cross_prefix}${ranlib}"
2692 strip="${cross_prefix}${strip}"
2693
2694 sysinclude_default="${sysroot}/usr/include"
2695
2696 set_default arch cc pkg_config sysinclude target_exec target_os
2697 enabled cross_compile || host_cc_default=$cc
2698 set_default host_cc
2699
2700 if ! $pkg_config --version >/dev/null 2>&1; then
2701     warn "$pkg_config not found, library detection may fail."
2702     pkg_config=false
2703 fi
2704
2705 exesuf() {
2706     case $1 in
2707         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2708     esac
2709 }
2710
2711 EXESUF=$(exesuf $target_os)
2712 HOSTEXESUF=$(exesuf $host_os)
2713
2714 # set temporary file name
2715 : ${TMPDIR:=$TEMPDIR}
2716 : ${TMPDIR:=$TMP}
2717 : ${TMPDIR:=/tmp}
2718
2719 if ! check_cmd mktemp -u XXXXXX; then
2720     # simple replacement for missing mktemp
2721     # NOT SAFE FOR GENERAL USE
2722     mktemp(){
2723         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2724     }
2725 fi
2726
2727 tmpfile(){
2728     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2729         (set -C; exec > $tmp) 2>/dev/null ||
2730         die "Unable to create temporary file in $TMPDIR."
2731     append TMPFILES $tmp
2732     eval $1=$tmp
2733 }
2734
2735 trap 'rm -f -- $TMPFILES' EXIT
2736
2737 tmpfile TMPASM .asm
2738 tmpfile TMPC   .c
2739 tmpfile TMPE   $EXESUF
2740 tmpfile TMPH   .h
2741 tmpfile TMPO   .o
2742 tmpfile TMPS   .S
2743 tmpfile TMPSH  .sh
2744 tmpfile TMPV   .ver
2745
2746 unset -f mktemp
2747
2748 chmod +x $TMPE
2749
2750 # make sure we can execute files in $TMPDIR
2751 cat > $TMPSH 2>> $logfile <<EOF
2752 #! /bin/sh
2753 EOF
2754 chmod +x $TMPSH >> $logfile 2>&1
2755 if ! $TMPSH >> $logfile 2>&1; then
2756     cat <<EOF
2757 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2758 variable to another directory and make sure that it is not mounted noexec.
2759 EOF
2760     die "Sanity test failed."
2761 fi
2762
2763 armasm_flags(){
2764     for flag; do
2765         case $flag in
2766             # Filter out MSVC cl.exe options from cflags that shouldn't
2767             # be passed to gas-preprocessor
2768             -M[TD]*)                                            ;;
2769             *)                  echo $flag                      ;;
2770         esac
2771    done
2772 }
2773
2774 ccc_flags(){
2775     for flag; do
2776         case $flag in
2777             -std=c99)           echo -c99                       ;;
2778             -mcpu=*)            echo -arch ${flag#*=}           ;;
2779             -mieee)             echo -ieee                      ;;
2780             -O*|-fast)          echo $flag                      ;;
2781             -fno-math-errno)    echo -assume nomath_errno       ;;
2782             -g)                 echo -g3                        ;;
2783             -Wall)              echo -msg_enable level2         ;;
2784             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2785             -Wl,*)              echo $flag                      ;;
2786             -f*|-W*)                                            ;;
2787             *)                  echo $flag                      ;;
2788         esac
2789    done
2790 }
2791
2792 cparser_flags(){
2793     for flag; do
2794         case $flag in
2795             -Wno-switch)             echo -Wno-switch-enum ;;
2796             -Wno-format-zero-length) ;;
2797             -Wdisabled-optimization) ;;
2798             -Wno-pointer-sign)       echo -Wno-other ;;
2799             *)                       echo $flag ;;
2800         esac
2801     done
2802 }
2803
2804 msvc_common_flags(){
2805     for flag; do
2806         case $flag in
2807             # In addition to specifying certain flags under the compiler
2808             # specific filters, they must be specified here as well or else the
2809             # generic catch all at the bottom will print the original flag.
2810             -Wall)                ;;
2811             -std=c99)             ;;
2812             # Common flags
2813             -fomit-frame-pointer) ;;
2814             -g)                   echo -Z7 ;;
2815             -fno-math-errno)      ;;
2816             -fno-common)          ;;
2817             -fno-signed-zeros)    ;;
2818             -fPIC)                ;;
2819             -mthumb)              ;;
2820             -march=*)             ;;
2821             -lz)                  echo zlib.lib ;;
2822             -lavifil32)           echo vfw32.lib ;;
2823             -lavicap32)           echo vfw32.lib user32.lib ;;
2824             -l*)                  echo ${flag#-l}.lib ;;
2825             -L*)                  echo -libpath:${flag#-L} ;;
2826             *)                    echo $flag ;;
2827         esac
2828     done
2829 }
2830
2831 msvc_flags(){
2832     msvc_common_flags "$@"
2833     for flag; do
2834         case $flag in
2835             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2836                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2837                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2838                                        -wd4273 -wd4554 -wd4701 ;;
2839         esac
2840     done
2841 }
2842
2843 icl_flags(){
2844     msvc_common_flags "$@"
2845     for flag; do
2846         case $flag in
2847             # Despite what Intel's documentation says -Wall, which is supported
2848             # on Windows, does enable remarks so disable them here.
2849             -Wall)                echo $flag -Qdiag-disable:remark ;;
2850             -std=c99)             echo -Qstd=c99 ;;
2851         esac
2852     done
2853 }
2854
2855 pgi_flags(){
2856     for flag; do
2857         case $flag in
2858             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2859             -fomit-frame-pointer) echo -Mnoframe ;;
2860             -g)                   echo -gopt ;;
2861             *)                    echo $flag ;;
2862         esac
2863     done
2864 }
2865
2866 suncc_flags(){
2867     for flag; do
2868         case $flag in
2869             -march=*|-mcpu=*)
2870                 case "${flag#*=}" in
2871                     native)                   echo -xtarget=native       ;;
2872                     v9|niagara)               echo -xarch=sparc          ;;
2873                     ultrasparc)               echo -xarch=sparcvis       ;;
2874                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2875                     i586|pentium)             echo -xchip=pentium        ;;
2876                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2877                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2878                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2879                     pentium4*)          echo -xtarget=pentium4           ;;
2880                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2881                     *-sse3)             echo -xarch=sse3                 ;;
2882                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2883                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2884                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2885                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2886                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2887                     k8|opteron|athlon64|athlon-fx)
2888                                                echo -xarch=sse2a         ;;
2889                     athlon*)                   echo -xarch=pentium_proa  ;;
2890                 esac
2891                 ;;
2892             -std=c99)             echo -xc99              ;;
2893             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2894             -fPIC)                echo -KPIC -xcode=pic32 ;;
2895             -W*,*)                echo $flag              ;;
2896             -f*-*|-W*|-mimpure-text)                      ;;
2897             -shared)              echo -G                 ;;
2898             *)                    echo $flag              ;;
2899         esac
2900     done
2901 }
2902
2903 tms470_flags(){
2904     for flag; do
2905         case $flag in
2906             -march=*|-mcpu=*)
2907                 case "${flag#*=}" in
2908                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2909                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2910                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2911                     armv6*|arm11*)          echo -mv=6   ;;
2912                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2913                                             echo -mv=5e  ;;
2914                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2915                 esac
2916                 ;;
2917             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2918             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2919             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2920             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2921             -msoft-float)   echo --float_support=vfplib       ;;
2922             -O[0-3]|-mf=*)  echo $flag                        ;;
2923             -g)             echo -g -mn                       ;;
2924             -pds=*)         echo $flag                        ;;
2925             -D*|-I*)        echo $flag                        ;;
2926             --gcc|--abi=*)  echo $flag                        ;;
2927             -me)            echo $flag                        ;;
2928         esac
2929     done
2930 }
2931
2932 probe_cc(){
2933     pfx=$1
2934     _cc=$2
2935
2936     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2937     unset _ld_o _ldflags _ld_lib _ld_path
2938     unset _depflags _DEPCMD _DEPFLAGS
2939     _flags_filter=echo
2940
2941     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2942         _type=llvm_gcc
2943         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
2944         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
2945         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2946         _cflags_speed='-O3'
2947         _cflags_size='-Os'
2948     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2949         _type=gcc
2950         gcc_version=$($_cc --version | head -n1)
2951         gcc_basever=$($_cc -dumpversion)
2952         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2953         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2954         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2955         if ! $_cc -dumpversion | grep -q '^2\.'; then
2956             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2957         fi
2958         _cflags_speed='-O3'
2959         _cflags_size='-Os'
2960     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2961         _type=icc
2962         _ident=$($_cc --version | head -n1)
2963         _depflags='-MMD'
2964         _cflags_speed='-O3'
2965         _cflags_size='-Os'
2966         _cflags_noopt='-O1'
2967     elif $_cc -v 2>&1 | grep -q xlc; then
2968         _type=xlc
2969         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2970         _cflags_speed='-O5'
2971         _cflags_size='-O5 -qcompact'
2972     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2973         _type=ccc
2974         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2975         _DEPFLAGS='-M'
2976         _cflags_speed='-fast'
2977         _cflags_size='-O1'
2978         _flags_filter=ccc_flags
2979     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
2980         test -d "$sysroot" || die "No valid sysroot specified."
2981         _type=armcc
2982         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
2983         armcc_conf="$PWD/armcc.conf"
2984         $_cc --arm_linux_configure                 \
2985              --arm_linux_config_file="$armcc_conf" \
2986              --configure_sysroot="$sysroot"        \
2987              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
2988              die "Error creating armcc configuration file."
2989         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
2990         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
2991         as_default="${cross_prefix}gcc"
2992         _depflags='-MMD'
2993         _cflags_speed='-O3'
2994         _cflags_size='-Os'
2995     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
2996         _type=tms470
2997         _ident=$($_cc -version | head -n1 | tr -s ' ')
2998         _flags='--gcc --abi=eabi -me'
2999         _cc_e='-ppl -fe=$@'
3000         _cc_o='-fe=$@'
3001         _depflags='-ppa -ppd=$(@:.o=.d)'
3002         _cflags_speed='-O3 -mf=5'
3003         _cflags_size='-O3 -mf=2'
3004         _flags_filter=tms470_flags
3005     elif $_cc -v 2>&1 | grep -q clang; then
3006         _type=clang
3007         _ident=$($_cc --version 2>/dev/null | head -n1)
3008         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3009         _cflags_speed='-O3'
3010         _cflags_size='-Os'
3011     elif $_cc -V 2>&1 | grep -q Sun; then
3012         _type=suncc
3013         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3014         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3015         _DEPFLAGS='-xM1 -xc99'
3016         _ldflags='-std=c99'
3017         _cflags_speed='-O5'
3018         _cflags_size='-O5 -xspace'
3019         _flags_filter=suncc_flags
3020     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3021         _type=pathscale
3022         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3023         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3024         _cflags_speed='-O2'
3025         _cflags_size='-Os'
3026         _flags_filter='filter_out -Wdisabled-optimization'
3027     elif $_cc -v 2>&1 | grep -q Open64; then
3028         _type=open64
3029         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3030         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3031         _cflags_speed='-O2'
3032         _cflags_size='-Os'
3033         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3034     elif $_cc -V 2>&1 | grep -q Portland; then
3035         _type=pgi
3036         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3037         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3038         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3039         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3040         _cflags_noopt="-O1"
3041         _flags_filter=pgi_flags
3042     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3043         _type=armasm
3044         _ident=$($_cc | head -n1)
3045         # 4509: "This form of conditional instruction is deprecated"
3046         _flags="-nologo -ignore 4509"
3047         _flags_filter=armasm_flags
3048     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3049         _type=msvc
3050         _ident=$($_cc 2>&1 | head -n1)
3051         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3052         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3053         _cflags_speed="-O2"
3054         _cflags_size="-O1"
3055         if $_cc -nologo- 2>&1 | grep -q Linker; then
3056             _ld_o='-out:$@'
3057         else
3058             _ld_o='-Fe$@'
3059         fi
3060         _cc_o='-Fo$@'
3061         _cc_e='-P -Fi$@'
3062         _flags_filter=msvc_flags
3063         _ld_lib='lib%.a'
3064         _ld_path='-libpath:'
3065         _flags='-nologo'
3066         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS'
3067     elif $_cc 2>&1 | grep -q Intel; then
3068         _type=icl
3069         _ident=$($_cc 2>&1 | head -n1)
3070         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3071         # Not only is O3 broken on 13.x+ but it is slower on all previous
3072         # versions (tested) as well.
3073         _cflags_speed="-O2"
3074         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3075         if $_cc 2>&1 | grep -q Linker; then
3076             _ld_o='-out:$@'
3077         else
3078             _ld_o='-Fe$@'
3079         fi
3080         _cc_o='-Fo$@'
3081         _cc_e='-P'
3082         _flags_filter=icl_flags
3083         _ld_lib='lib%.a'
3084         _ld_path='-libpath:'
3085         # -Qdiag-error to make icl error when seeing certain unknown arguments
3086         _flags='-nologo -Qdiag-error:4044,10157'
3087         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3088         # with MSVC which enables it by default.
3089         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3090     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3091         _type=cparser
3092         _ident=$($_cc --version | head -n1)
3093         _depflags='-MMD'
3094         _cflags_speed='-O4'
3095         _cflags_size='-O2'
3096         _flags_filter=cparser_flags
3097     fi
3098
3099     eval ${pfx}_type=\$_type
3100     eval ${pfx}_ident=\$_ident
3101 }
3102
3103 set_ccvars(){
3104     eval ${1}_C=\${_cc_c-\${${1}_C}}
3105     eval ${1}_E=\${_cc_e-\${${1}_E}}
3106     eval ${1}_O=\${_cc_o-\${${1}_O}}
3107
3108     if [ -n "$_depflags" ]; then
3109         eval ${1}_DEPFLAGS=\$_depflags
3110     else
3111         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3112         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3113         eval DEP${1}FLAGS=\$_flags
3114     fi
3115 }
3116
3117 probe_cc cc "$cc"
3118 cflags_filter=$_flags_filter
3119 cflags_speed=$_cflags_speed
3120 cflags_size=$_cflags_size
3121 cflags_noopt=$_cflags_noopt
3122 add_cflags $_flags $_cflags
3123 cc_ldflags=$_ldflags
3124 set_ccvars CC
3125
3126 probe_cc hostcc "$host_cc"
3127 host_cflags_filter=$_flags_filter
3128 add_host_cflags  $_flags $_cflags
3129 set_ccvars HOSTCC
3130
3131 test -n "$cc_type" && enable $cc_type ||
3132     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3133
3134 : ${as_default:=$cc}
3135 : ${dep_cc_default:=$cc}
3136 : ${ld_default:=$cc}
3137 : ${host_ld_default:=$host_cc}
3138 set_default ar as dep_cc ld host_ld
3139
3140 probe_cc as "$as"
3141 asflags_filter=$_flags_filter
3142 add_asflags $_flags $_cflags
3143 set_ccvars AS
3144
3145 probe_cc ld "$ld"
3146 ldflags_filter=$_flags_filter
3147 add_ldflags $_flags $_ldflags
3148 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3149 LD_O=${_ld_o-$LD_O}
3150 LD_LIB=${_ld_lib-$LD_LIB}
3151 LD_PATH=${_ld_path-$LD_PATH}
3152
3153 probe_cc hostld "$host_ld"
3154 host_ldflags_filter=$_flags_filter
3155 add_host_ldflags $_flags $_ldflags
3156 HOSTLD_O=${_ld_o-$HOSTLD_O}
3157
3158 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3159     probe_cc depcc "$dep_cc"
3160     CCDEP=${_DEPCMD:-$DEPCMD}
3161     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3162     DEPCCFLAGS=$_flags
3163 fi
3164
3165 if $ar 2>&1 | grep -q Microsoft; then
3166     arflags="-nologo"
3167     ar_o='-out:$@'
3168 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3169     arflags="rq"
3170     ar_o='$@'
3171 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3172     arflags='-Xany -r -c'
3173     ar_o='$@'
3174 else
3175     arflags="rc"
3176     ar_o='$@'
3177 fi
3178
3179 add_cflags $extra_cflags
3180 add_asflags $extra_cflags
3181
3182 if test -n "$sysroot"; then
3183     case "$cc_type" in
3184         gcc|llvm_gcc|clang)
3185             add_cppflags --sysroot="$sysroot"
3186             add_ldflags --sysroot="$sysroot"
3187         ;;
3188         tms470)
3189             add_cppflags -I"$sysinclude"
3190             add_ldflags  --sysroot="$sysroot"
3191         ;;
3192     esac
3193 fi
3194
3195 if test "$cpu" = host; then
3196     enabled cross_compile &&
3197         die "--cpu=host makes no sense when cross-compiling."
3198
3199     case "$cc_type" in
3200         gcc|llvm_gcc)
3201             check_native(){
3202                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3203                 sed -n "/cc1.*$1=/{
3204                             s/.*$1=\\([^ ]*\\).*/\\1/
3205                             p
3206                             q
3207                         }" $TMPE
3208             }
3209             cpu=$(check_native -march || check_native -mcpu)
3210         ;;
3211     esac
3212
3213     test "${cpu:-host}" = host &&
3214         die "--cpu=host not supported with compiler $cc"
3215 fi
3216
3217 # Deal with common $arch aliases
3218 case "$arch" in
3219     aarch64|arm64)
3220         arch="aarch64"
3221     ;;
3222     arm*)
3223         arch="arm"
3224     ;;
3225     mips*|IP*)
3226         arch="mips"
3227     ;;
3228     parisc*|hppa*)
3229         arch="parisc"
3230     ;;
3231     "Power Macintosh"|ppc*|powerpc*)
3232         arch="ppc"
3233     ;;
3234     s390|s390x)
3235         arch="s390"
3236     ;;
3237     sh4|sh)
3238         arch="sh4"
3239     ;;
3240     sun4u|sparc*)
3241         arch="sparc"
3242     ;;
3243     tilegx|tile-gx)
3244         arch="tilegx"
3245     ;;
3246     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3247         arch="x86"
3248     ;;
3249 esac
3250
3251 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3252 enable $arch
3253
3254 # Add processor-specific flags
3255 if enabled aarch64; then
3256
3257     case $cpu in
3258         armv*)
3259             cpuflags="-march=$cpu"
3260         ;;
3261         *)
3262             cpuflags="-mcpu=$cpu"
3263         ;;
3264     esac
3265
3266 elif enabled alpha; then
3267
3268     cpuflags="-mcpu=$cpu"
3269
3270 elif enabled arm; then
3271
3272     check_arm_arch() {
3273         check_cpp_condition stddef.h \
3274             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3275             $cpuflags
3276     }
3277
3278     probe_arm_arch() {
3279         if   check_arm_arch 4;        then echo armv4;
3280         elif check_arm_arch 4T;       then echo armv4t;
3281         elif check_arm_arch 5;        then echo armv5;
3282         elif check_arm_arch 5E;       then echo armv5e;
3283         elif check_arm_arch 5T;       then echo armv5t;
3284         elif check_arm_arch 5TE;      then echo armv5te;
3285         elif check_arm_arch 5TEJ;     then echo armv5te;
3286         elif check_arm_arch 6;        then echo armv6;
3287         elif check_arm_arch 6J;       then echo armv6j;
3288         elif check_arm_arch 6K;       then echo armv6k;
3289         elif check_arm_arch 6Z;       then echo armv6z;
3290         elif check_arm_arch 6ZK;      then echo armv6zk;
3291         elif check_arm_arch 6T2;      then echo armv6t2;
3292         elif check_arm_arch 7;        then echo armv7;
3293         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3294         elif check_arm_arch 7S;       then echo armv7-a;
3295         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3296         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3297         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3298         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3299         fi
3300     }
3301
3302     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3303
3304     case $cpu in
3305         armv*)
3306             cpuflags="-march=$cpu"
3307             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3308         ;;
3309         *)
3310             cpuflags="-mcpu=$cpu"
3311             case $cpu in
3312                 cortex-a*)                               subarch=armv7a  ;;
3313                 cortex-r*)                               subarch=armv7r  ;;
3314                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3315                 arm11*)                                  subarch=armv6   ;;
3316                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3317                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3318                 *)                             subarch=$(probe_arm_arch) ;;
3319             esac
3320         ;;
3321     esac
3322
3323     case "$subarch" in
3324         armv5t*)    enable fast_clz                ;;
3325         armv[6-8]*) enable fast_clz fast_unaligned ;;
3326     esac
3327
3328 elif enabled avr32; then
3329
3330     case $cpu in
3331         ap7[02]0[0-2])
3332             subarch="avr32_ap"
3333             cpuflags="-mpart=$cpu"
3334         ;;
3335         ap)
3336             subarch="avr32_ap"
3337             cpuflags="-march=$cpu"
3338         ;;
3339         uc3[ab]*)
3340             subarch="avr32_uc"
3341             cpuflags="-mcpu=$cpu"
3342         ;;
3343         uc)
3344             subarch="avr32_uc"
3345             cpuflags="-march=$cpu"
3346         ;;
3347     esac
3348
3349 elif enabled bfin; then
3350
3351     cpuflags="-mcpu=$cpu"
3352
3353 elif enabled mips; then
3354
3355     cpuflags="-march=$cpu"
3356
3357 elif enabled ppc; then
3358
3359     disable ldbrx
3360
3361     case $(tolower $cpu) in
3362         601|ppc601|powerpc601)
3363             cpuflags="-mcpu=601"
3364             disable altivec
3365         ;;
3366         603*|ppc603*|powerpc603*)
3367             cpuflags="-mcpu=603"
3368             disable altivec
3369         ;;
3370         604*|ppc604*|powerpc604*)
3371             cpuflags="-mcpu=604"
3372             disable altivec
3373         ;;
3374         g3|75*|ppc75*|powerpc75*)
3375             cpuflags="-mcpu=750"
3376             disable altivec
3377         ;;
3378         g4|745*|ppc745*|powerpc745*)
3379             cpuflags="-mcpu=7450"
3380             disable vsx
3381         ;;
3382         74*|ppc74*|powerpc74*)
3383             cpuflags="-mcpu=7400"
3384             disable vsx
3385         ;;
3386         g5|970|ppc970|powerpc970)
3387             cpuflags="-mcpu=970"
3388             disable vsx
3389         ;;
3390         power[3-6]*)
3391             cpuflags="-mcpu=$cpu"
3392             disable vsx
3393         ;;
3394         power[7-8]*)
3395             cpuflags="-mcpu=$cpu"
3396             enable ldbrx
3397         ;;
3398         cell)
3399             cpuflags="-mcpu=cell"
3400             enable ldbrx
3401             disable vsx
3402         ;;
3403         e500mc)
3404             cpuflags="-mcpu=e500mc"
3405             disable altivec
3406         ;;
3407         e500v2)
3408             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3409             disable altivec
3410             disable dcbzl
3411         ;;
3412         e500)
3413             cpuflags="-mcpu=8540 -mhard-float"
3414             disable altivec
3415             disable dcbzl
3416         ;;
3417     esac
3418
3419 elif enabled sparc; then
3420
3421     case $cpu in
3422         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3423             cpuflags="-mcpu=$cpu"
3424         ;;
3425         ultrasparc*|niagara[234])
3426             cpuflags="-mcpu=$cpu"
3427         ;;
3428     esac
3429
3430 elif enabled x86; then
3431
3432     case $cpu in
3433         i[345]86|pentium)
3434             cpuflags="-march=$cpu"
3435             disable i686
3436             disable mmx
3437         ;;
3438         # targets that do NOT support nopl and conditional mov (cmov)
3439         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3440             cpuflags="-march=$cpu"
3441             disable i686
3442         ;;
3443         # targets that do support nopl and conditional mov (cmov)
3444         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3445             cpuflags="-march=$cpu"
3446             enable i686
3447             enable fast_cmov
3448         ;;
3449         # targets that do support conditional mov but on which it's slow
3450         pentium4|pentium4m|prescott|nocona)
3451             cpuflags="-march=$cpu"
3452             enable i686
3453             disable fast_cmov
3454         ;;
3455     esac
3456
3457 fi
3458
3459 if [ "$cpu" != generic ]; then
3460     add_cflags  $cpuflags
3461     add_asflags $cpuflags
3462 fi
3463
3464 # compiler sanity check
3465 check_exec <<EOF
3466 int main(void){ return 0; }
3467 EOF
3468 if test "$?" != 0; then
3469     echo "$cc is unable to create an executable file."
3470     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3471         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3472         echo "Only do this if you know what cross compiling means."
3473     fi
3474     die "C compiler test failed."
3475 fi
3476
3477 add_cppflags -D_ISOC99_SOURCE
3478 check_cflags -std=c99
3479 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3480 #include <stdlib.h>
3481 EOF
3482 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3483 #include <stdlib.h>
3484 EOF
3485
3486 add_host_cppflags -D_ISOC99_SOURCE
3487 check_host_cflags -std=c99
3488 check_host_cflags -Wall
3489 check_host_cflags -O3
3490
3491 check_64bit(){
3492     arch32=$1
3493     arch64=$2
3494     expr=$3
3495     check_code cc "" "int test[2*($expr) - 1]" &&
3496         subarch=$arch64 || subarch=$arch32
3497 }
3498
3499 case "$arch" in
3500     aarch64|alpha|ia64)
3501         spic=$shared
3502     ;;
3503     mips)
3504         check_64bit mips mips64 '_MIPS_SIM > 1'
3505         spic=$shared
3506     ;;
3507     parisc)
3508         check_64bit parisc parisc64 'sizeof(void *) > 4'
3509         spic=$shared
3510     ;;
3511     ppc)
3512         check_64bit ppc ppc64 'sizeof(void *) > 4'
3513         spic=$shared
3514     ;;
3515     s390)
3516         check_64bit s390 s390x 'sizeof(void *) > 4'
3517         spic=$shared
3518     ;;
3519     sparc)
3520         check_64bit sparc sparc64 'sizeof(void *) > 4'
3521         spic=$shared
3522     ;;
3523     x86)
3524         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3525         if test "$subarch" = "x86_64"; then
3526             spic=$shared
3527         fi
3528     ;;
3529 esac
3530
3531 enable $subarch
3532 enabled spic && enable_weak pic
3533
3534 # OS specific
3535 case $target_os in
3536     aix)
3537         SHFLAGS=-shared
3538         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3539         enabled shared && add_ldflags -Wl,-brtl
3540         ;;
3541     android)
3542         disable symver
3543         enable section_data_rel_ro
3544         SLIB_INSTALL_NAME='$(SLIBNAME)'
3545         SLIB_INSTALL_LINKS=
3546         # soname not set on purpose
3547         SHFLAGS=-shared
3548         ;;
3549     haiku)
3550         prefix_default="/boot/common"
3551         network_extralibs="-lnetwork"
3552         host_libs=
3553         ;;
3554     sunos)
3555         SHFLAGS='-shared -Wl,-h,$$(@F)'
3556         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3557         network_extralibs="-lsocket -lnsl"
3558         # When using suncc to build, the Solaris linker will mark
3559         # an executable with each instruction set encountered by
3560         # the Solaris assembler.  As our libraries contain their own
3561         # guards for processor-specific code, instead suppress
3562         # generation of the HWCAPS ELF section on Solaris x86 only.
3563         enabled_all suncc x86 &&
3564             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3565             add_ldflags -Wl,-M,mapfile
3566         nm_default='nm -P -g'
3567         ;;
3568     netbsd)
3569         disable symver
3570         oss_indev_extralibs="-lossaudio"
3571         oss_outdev_extralibs="-lossaudio"
3572         ;;
3573     openbsd|bitrig)
3574         disable symver
3575         SHFLAGS='-shared'
3576         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3577         SLIB_INSTALL_LINKS=
3578         oss_indev_extralibs="-lossaudio"
3579         oss_outdev_extralibs="-lossaudio"
3580         ;;
3581     dragonfly)
3582         disable symver
3583         ;;
3584     freebsd)
3585         ;;
3586     bsd/os)
3587         add_extralibs -lpoll -lgnugetopt
3588         ;;
3589     darwin)
3590         enabled ppc && add_asflags -force_cpusubtype_ALL
3591         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3592         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3593         add_ldflags -Wl,-dynamic,-search_paths_first
3594         SLIBSUF=".dylib"
3595         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3596         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3597         objformat="macho"
3598         enabled x86_64 && objformat="macho64"
3599         enabled_any pic shared ||
3600             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3601         ;;
3602     mingw32*)
3603         if test $target_os = "mingw32ce"; then
3604             disable network
3605         else
3606             target_os=mingw32
3607         fi
3608         LIBTARGET=i386
3609         if enabled x86_64; then
3610             LIBTARGET="i386:x86-64"
3611         elif enabled arm; then
3612             LIBTARGET=arm-wince
3613         fi
3614         check_ldflags -Wl,--nxcompat
3615         check_ldflags -Wl,--dynamicbase
3616         shlibdir_default="$bindir_default"
3617         SLIBPREF=""
3618         SLIBSUF=".dll"
3619         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3620         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3621         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3622         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3623         SLIB_INSTALL_LINKS=
3624         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3625         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3626         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3627         objformat="win32"
3628         dlltool="${cross_prefix}dlltool"
3629         ranlib=:
3630         enable dos_paths
3631         ;;
3632     win32|win64)
3633         disable symver
3634         if enabled shared; then
3635             # Link to the import library instead of the normal static library
3636             # for shared libs.
3637             LD_LIB='%.lib'
3638             # Cannot build both shared and static libs with MSVC or icl.
3639             disable static
3640         fi
3641         shlibdir_default="$bindir_default"
3642         SLIBPREF=""
3643         SLIBSUF=".dll"
3644         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3645         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3646         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3647         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3648         SLIB_INSTALL_LINKS=
3649         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3650         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3651         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3652         objformat="win32"
3653         ranlib=:
3654         enable dos_paths
3655         ;;
3656     cygwin*)
3657         target_os=cygwin
3658         shlibdir_default="$bindir_default"
3659         SLIBPREF="cyg"
3660         SLIBSUF=".dll"
3661         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3662         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3663         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3664         SLIB_INSTALL_LINKS=
3665         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3666         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3667         objformat="win32"
3668         enable dos_paths
3669         ;;
3670     *-dos|freedos|opendos)
3671         network_extralibs="-lsocket"
3672         objformat="coff"
3673         enable dos_paths
3674         add_cppflags -U__STRICT_ANSI__
3675         ;;
3676     linux)
3677         enable dv1394
3678         enable section_data_rel_ro
3679         ;;
3680     irix*)
3681         target_os=irix
3682         ranlib="echo ignoring ranlib"
3683         ;;
3684     os/2*)
3685         ln_s="cp -f"
3686         objformat="aout"
3687         add_cppflags -D_GNU_SOURCE
3688         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3689         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3690         LIBSUF="_s.a"
3691         SLIBPREF=""
3692         SLIBSUF=".dll"
3693         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3694         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3695         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3696             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3697             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3698             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3699             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3700         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3701             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3702         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3703         enable dos_paths
3704         ;;
3705     gnu/kfreebsd)
3706         add_cppflags -D_BSD_SOURCE
3707         ;;
3708     gnu)
3709         ;;
3710     qnx)
3711         add_cppflags -D_QNX_SOURCE
3712         network_extralibs="-lsocket"
3713         ;;
3714     symbian)
3715         SLIBSUF=".dll"
3716         enable dos_paths
3717         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3718         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3719         add_ldflags -Wl,--target1-abs,--no-undefined \
3720                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3721                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3722         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3723                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3724                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3725         ;;
3726     osf1)
3727         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3728         ;;
3729     minix)
3730         ;;
3731     plan9)
3732         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3733                      -D_REENTRANT_SOURCE        \
3734                      -D_RESEARCH_SOURCE         \
3735                      -DFD_SETSIZE=96            \
3736                      -DHAVE_SOCK_OPTS
3737         add_compat strtod.o strtod=avpriv_strtod
3738         network_extralibs='-lbsd'
3739         exeobjs=compat/plan9/main.o
3740         cp_f='cp'
3741         ;;
3742     none)
3743         ;;
3744     *)
3745         die "Unknown OS '$target_os'."
3746         ;;
3747 esac
3748
3749 # determine libc flavour
3750
3751 probe_libc(){
3752     pfx=$1
3753     pfx_no_=${pfx%_}
3754     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3755     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3756         eval ${pfx}libc_type=uclibc
3757         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3758     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3759         eval ${pfx}libc_type=glibc
3760         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3761     # MinGW headers can be installed on Cygwin, so check for newlib first.
3762     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3763         eval ${pfx}libc_type=newlib
3764         add_${pfx}cppflags -U__STRICT_ANSI__
3765     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3766     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3767         eval ${pfx}libc_type=mingw64
3768         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3769         eval test \$${pfx_no_}cc_type = "gcc" &&
3770             add_${pfx}cppflags -D__printf__=__gnu_printf__
3771     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3772          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3773         eval ${pfx}libc_type=mingw32
3774         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3775             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3776             die "ERROR: MinGW32 runtime version must be >= 3.15."
3777         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3778         eval test \$${pfx_no_}cc_type = "gcc" &&
3779             add_${pfx}cppflags -D__printf__=__gnu_printf__
3780     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3781         eval ${pfx}libc_type=msvcrt
3782         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3783             if [ "$pfx" = host_ ]; then
3784                 add_host_cppflags -Dsnprintf=_snprintf
3785             else
3786                 add_compat strtod.o strtod=avpriv_strtod
3787                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3788                                              _snprintf=avpriv_snprintf  \
3789                                              vsnprintf=avpriv_vsnprintf
3790             fi
3791         fi
3792         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3793         # 0x601 by default unless something else is set by the user.
3794         # This can easily lead to us detecting functions only present
3795         # in such new versions and producing binaries requiring windows 7.0.
3796         # Therefore explicitly set the default to XP unless the user has
3797         # set something else on the command line.
3798         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3799         # family. For these cases, configure is free to use any functions
3800         # found in the SDK headers by default. (Alternatively, we could force
3801         # _WIN32_WINNT to 0x0602 in that case.)
3802         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3803             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3804 #ifdef WINAPI_FAMILY
3805 #include <winapifamily.h>
3806 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3807 #error not desktop
3808 #endif
3809 #endif
3810 EOF
3811     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3812         eval ${pfx}libc_type=klibc
3813     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3814         eval ${pfx}libc_type=bionic
3815     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3816         eval ${pfx}libc_type=solaris
3817         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3818     else
3819         eval ${pfx}libc_type=default
3820         add_${pfx}cppflags -D_DEFAULT_SOURCE
3821     fi
3822 }
3823
3824 probe_libc
3825 test -n "$libc_type" && enable libc_$libc_type
3826 probe_libc host_
3827 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3828
3829 case $libc_type in
3830     bionic)
3831         add_compat strtod.o strtod=avpriv_strtod
3832         ;;
3833 esac
3834
3835 # hacks for compiler/libc/os combinations
3836
3837 if enabled_all tms470 libc_glibc; then
3838     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3839     add_cppflags -D__USER_LABEL_PREFIX__=
3840     add_cppflags -D__builtin_memset=memset
3841     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3842     add_cflags   -pds=48    # incompatible redefinition of macro
3843 fi
3844
3845 if enabled_all ccc libc_glibc; then
3846     add_ldflags -Wl,-z,now  # calls to libots crash without this
3847 fi
3848
3849 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3850     add_cppflags '-I\$(SRC_PATH)/compat/float'
3851
3852 esc(){
3853     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3854 }
3855
3856 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3857
3858 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3859
3860 set_default $PATHS_LIST
3861 set_default nm
3862
3863 # we need to build at least one lib type
3864 if ! enabled_any static shared; then
3865     cat <<EOF
3866 At least one library type must be built.
3867 Specify --enable-static to build the static libraries or --enable-shared to
3868 build the shared libraries as well. To only build the shared libraries specify
3869 --disable-static in addition to --enable-shared.
3870 EOF
3871     exit 1;
3872 fi
3873
3874 die_license_disabled() {
3875     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3876 }
3877
3878 die_license_disabled gpl libcdio
3879 die_license_disabled gpl libx264
3880 die_license_disabled gpl libx265
3881 die_license_disabled gpl libxavs
3882 die_license_disabled gpl libxvid
3883 die_license_disabled gpl x11grab
3884
3885 die_license_disabled nonfree libfaac
3886 die_license_disabled nonfree libfdk_aac
3887 die_license_disabled nonfree nvenc
3888 die_license_disabled nonfree openssl
3889
3890 die_license_disabled version3 libopencore_amrnb
3891 die_license_disabled version3 libopencore_amrwb
3892 die_license_disabled version3 libvo_aacenc
3893 die_license_disabled version3 libvo_amrwbenc
3894
3895 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3896
3897 disabled optimizations || check_cflags -fomit-frame-pointer
3898
3899 enable_weak_pic() {
3900     disabled pic && return
3901     enable pic
3902     add_cppflags -DPIC
3903     case "$target_os" in
3904     mingw*|cygwin*)
3905         ;;
3906     *)
3907         add_cflags -fPIC
3908         ;;
3909     esac
3910     add_asflags  -fPIC
3911 }
3912
3913 enabled pic && enable_weak_pic
3914
3915 check_cc <<EOF || die "Symbol mangling check failed."
3916 int ff_extern;
3917 EOF
3918 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3919 extern_prefix=${sym%%ff_extern*}
3920
3921 check_cc <<EOF && enable_weak inline_asm
3922 void foo(void) { __asm__ volatile ("" ::); }
3923 EOF
3924
3925 _restrict=
3926 for restrict_keyword in restrict __restrict__ __restrict; do
3927     check_cc <<EOF && _restrict=$restrict_keyword && break
3928 void foo(char * $restrict_keyword p);
3929 EOF
3930 done
3931
3932 check_cc <<EOF && enable pragma_deprecated
3933 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3934 EOF
3935
3936 check_cc <<EOF && enable attribute_packed
3937 struct { int x; } __attribute__((packed)) x;
3938 EOF
3939
3940 check_cc <<EOF && enable attribute_may_alias
3941 union { int x; } __attribute__((may_alias)) x;
3942 EOF
3943
3944 check_cc <<EOF || die "endian test failed"
3945 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3946 EOF
3947 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3948
3949 check_gas() {
3950     log "check_gas using '$as' as AS"
3951     # :vararg is used on aarch64, arm and ppc altivec
3952     check_as <<EOF || return 1
3953 .macro m n, y:vararg=0
3954 \n: .int \y
3955 .endm
3956 m x
3957 EOF
3958     # .altmacro is only used in arm asm
3959     ! enabled arm || check_as <<EOF || return 1
3960 .altmacro
3961 EOF
3962     enable gnu_as
3963     return 0
3964 }
3965
3966 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
3967     nogas=:
3968     enabled_any arm aarch64 && nogas=die
3969     enabled_all ppc altivec && nogas=warn
3970     as_noop=-v
3971
3972     case $as_type in
3973         arm*) gaspp_as_type=armasm; as_noop=-h ;;
3974         gcc)  gaspp_as_type=gas ;;
3975         *)    gaspp_as_type=$as_type ;;
3976     esac
3977
3978     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
3979
3980     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
3981         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
3982
3983     if ! check_gas ; then
3984         as=${gas:=$as}
3985         check_gas || \
3986             $nogas "GNU assembler not found, install/update gas-preprocessor"
3987     fi
3988
3989     check_as <<EOF && enable as_func
3990 .func test
3991 .endfunc
3992 EOF
3993 fi
3994
3995 check_inline_asm inline_asm_labels '"1:\n"'
3996
3997 if enabled aarch64; then
3998     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
3999     # internal assembler in clang 3.3 does not support this instruction
4000     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4001     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4002
4003     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4004
4005 elif enabled alpha; then
4006
4007     check_cflags -mieee
4008
4009 elif enabled arm; then
4010
4011     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4012     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4013     enabled thumb && check_cflags -mthumb || check_cflags -marm
4014
4015     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4016         enable vfp_args
4017     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4018         enable vfp_args
4019     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4020         case "${cross_prefix:-$cc}" in
4021             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4022             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4023 __asm__ (".eabi_attribute 28, 1");
4024 int main(void) { return 0; }
4025 EOF
4026         esac
4027         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4028     fi
4029
4030     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4031     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4032     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4033     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4034     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4035     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4036
4037     [ $target_os = linux ] || [ $target_os = android ] ||
4038         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4039             $ARCH_EXT_LIST_ARM
4040
4041     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4042
4043     check_as <<EOF && enable as_dn_directive
4044 ra .dn d0.i16
4045 .unreq ra
4046 EOF
4047
4048     # llvm's integrated assembler supports .object_arch from llvm 3.5
4049     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4050 .object_arch armv4
4051 EOF
4052
4053     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4054
4055 elif enabled mips; then
4056
4057     check_inline_asm loongson '"dmult.g $1, $2, $3"'