9e83285f2cbf2114856d5d8515492a7c43381609
[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     lzf
1617     me_cmp
1618     mpeg_er
1619     mpegaudio
1620     mpegaudiodsp
1621     mpegvideo
1622     mpegvideoenc
1623     mss34dsp
1624     pixblockdsp
1625     qpeldsp
1626     qsv
1627     qsvdec
1628     qsvenc
1629     rangecoder
1630     riffdec
1631     riffenc
1632     rtpdec
1633     rtpenc_chain
1634     rv34dsp
1635     sinewin
1636     snappy
1637     startcode
1638     texturedsp
1639     texturedspenc
1640     tpeldsp
1641     videodsp
1642     vp3dsp
1643     vp56dsp
1644     vp8dsp
1645     wma_freqs
1646     wmv2dsp
1647 "
1648
1649 CMDLINE_SELECT="
1650     $ARCH_EXT_LIST
1651     $CONFIG_LIST
1652     $HAVE_LIST_CMDLINE
1653     $THREADS_LIST
1654     asm
1655     cross_compile
1656     debug
1657     extra_warnings
1658     logging
1659     lto
1660     optimizations
1661     rpath
1662 "
1663
1664 PATHS_LIST="
1665     bindir
1666     datadir
1667     docdir
1668     incdir
1669     libdir
1670     mandir
1671     prefix
1672     shlibdir
1673 "
1674
1675 CMDLINE_SET="
1676     $PATHS_LIST
1677     ar
1678     arch
1679     as
1680     build_suffix
1681     cc
1682     cpu
1683     cross_prefix
1684     dep_cc
1685     env
1686     extra_version
1687     host_cc
1688     host_cflags
1689     host_ld
1690     host_ldflags
1691     host_libs
1692     host_os
1693     ld
1694     logfile
1695     malloc_prefix
1696     nm
1697     optflags
1698     pkg_config
1699     pkg_config_flags
1700     random_seed
1701     samples
1702     sysinclude
1703     sysroot
1704     target_exec
1705     target_os
1706     target_path
1707     target_samples
1708     toolchain
1709 "
1710
1711 CMDLINE_APPEND="
1712     extra_cflags
1713     host_cppflags
1714 "
1715
1716 # code dependency declarations
1717
1718 # architecture extensions
1719
1720 armv5te_deps="arm"
1721 armv6_deps="arm"
1722 armv6t2_deps="arm"
1723 armv8_deps="aarch64"
1724 neon_deps_any="aarch64 arm"
1725 intrinsics_neon_deps="neon"
1726 vfp_deps_any="aarch64 arm"
1727 vfpv3_deps="vfp"
1728
1729 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1730
1731 altivec_deps="ppc"
1732 ppc4xx_deps="ppc"
1733 vsx_deps="altivec"
1734 power8_deps="vsx"
1735
1736 cpunop_deps="i686"
1737 x86_64_select="i686"
1738 x86_64_suggest="fast_cmov"
1739
1740 amd3dnow_deps="mmx"
1741 amd3dnowext_deps="amd3dnow"
1742 i686_deps="x86"
1743 mmx_deps="x86"
1744 mmxext_deps="mmx"
1745 sse_deps="mmxext"
1746 sse2_deps="sse"
1747 sse3_deps="sse2"
1748 ssse3_deps="sse3"
1749 sse4_deps="ssse3"
1750 sse42_deps="sse4"
1751 avx_deps="sse42"
1752 xop_deps="avx"
1753 fma3_deps="avx"
1754 fma4_deps="avx"
1755 avx2_deps="avx"
1756
1757 mmx_external_deps="yasm"
1758 mmx_inline_deps="inline_asm"
1759 mmx_suggest="mmx_external mmx_inline"
1760
1761 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1762     eval dep=\$${ext}_deps
1763     eval ${ext}_external_deps='"${dep}_external"'
1764     eval ${ext}_inline_deps='"${dep}_inline"'
1765     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1766 done
1767
1768 aligned_stack_if_any="aarch64 ppc x86"
1769 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1770 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1771 fast_unaligned_if_any="aarch64 ppc x86"
1772 simd_align_16_if_any="altivec neon sse"
1773
1774 # system capabilities
1775 symver_if_any="symver_asm_label symver_gnu_asm"
1776 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1777
1778 # threading support
1779 atomics_gcc_if="sync_val_compare_and_swap"
1780 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1781 atomics_win32_if="MemoryBarrier"
1782 atomics_native_if_any="$ATOMICS_LIST"
1783 w32threads_deps="atomics_native"
1784 threads_if_any="$THREADS_LIST"
1785
1786 # subsystems
1787 dct_select="rdft"
1788 error_resilience_select="me_cmp"
1789 faandct_deps="faan fdctdsp"
1790 faanidct_deps="faan idctdsp"
1791 intrax8_select="error_resilience"
1792 mdct_select="fft"
1793 rdft_select="fft"
1794 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1795 mpeg_er_select="error_resilience"
1796 mpegaudio_select="mpegaudiodsp"
1797 mpegaudiodsp_select="dct"
1798 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
1799 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1800 nvenc_deps_any="dlopen LoadLibrary"
1801 nvenc_extralibs='$ldl'
1802 qsvdec_select="qsv"
1803 qsvenc_select="qsv"
1804
1805 # decoders / encoders
1806 aac_decoder_select="imdct15 mdct sinewin"
1807 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1808 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1809 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1810 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1811 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1812 adpcm_g722_decoder_select="g722dsp"
1813 adpcm_g722_encoder_select="g722dsp"
1814 aic_decoder_select="golomb idctdsp"
1815 alac_encoder_select="lpc"
1816 als_decoder_select="bswapdsp"
1817 amrnb_decoder_select="lsp"
1818 amrwb_decoder_select="lsp"
1819 amv_decoder_select="sp5x_decoder"
1820 ape_decoder_select="bswapdsp"
1821 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1822 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1823 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1824 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1825 atrac1_decoder_select="mdct sinewin"
1826 atrac3_decoder_select="mdct"
1827 atrac3p_decoder_select="mdct sinewin"
1828 bink_decoder_select="blockdsp hpeldsp"
1829 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1830 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1831 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1832 cllc_decoder_select="bswapdsp"
1833 comfortnoise_encoder_select="lpc"
1834 cook_decoder_select="audiodsp mdct sinewin"
1835 cscd_decoder_select="lzo"
1836 cscd_decoder_suggest="zlib"
1837 dca_decoder_select="fmtconvert mdct"
1838 dds_decoder_select="texturedsp"
1839 dnxhd_decoder_select="blockdsp idctdsp"
1840 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1841 dvvideo_decoder_select="dvprofile idctdsp"
1842 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1843 dxa_decoder_deps="zlib"
1844 eac3_decoder_select="ac3_decoder"
1845 eac3_encoder_select="ac3_encoder"
1846 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1847 eatgq_decoder_select="aandcttables idctdsp"
1848 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpeg1video_decoder"
1849 exr_decoder_deps="zlib"
1850 ffv1_decoder_select="golomb rangecoder"
1851 ffv1_encoder_select="rangecoder"
1852 ffvhuff_decoder_select="huffyuv_decoder"
1853 ffvhuff_encoder_select="huffyuv_encoder"
1854 fic_decoder_select="golomb"
1855 flac_decoder_select="flacdsp golomb"
1856 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1857 flashsv_decoder_deps="zlib"
1858 flashsv_encoder_deps="zlib"
1859 flashsv2_decoder_deps="zlib"
1860 flv_decoder_select="h263_decoder"
1861 flv_encoder_select="h263_encoder"
1862 fourxm_decoder_select="blockdsp bswapdsp"
1863 fraps_decoder_select="bswapdsp huffman"
1864 g2m_decoder_deps="zlib"
1865 g2m_decoder_select="blockdsp idctdsp jpegtables"
1866 h261_decoder_select="mpeg_er mpegvideo"
1867 h261_encoder_select="aandcttables mpegvideoenc"
1868 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1869 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1870 h263i_decoder_select="h263_decoder"
1871 h263p_encoder_select="h263_encoder"
1872 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode videodsp"
1873 h264_decoder_suggest="error_resilience"
1874 h264_nvenc_encoder_deps="nvenc"
1875 h264_qsv_decoder_deps="libmfx"
1876 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
1877 h264_qsv_encoder_deps="libmfx"
1878 h264_qsv_encoder_select="qsvenc"
1879 hap_decoder_select="snappy texturedsp"
1880 hap_encoder_deps="libsnappy"
1881 hap_encoder_select="texturedspenc"
1882 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1883 hevc_nvenc_encoder_deps="nvenc"
1884 hevc_qsv_encoder_deps="libmfx"
1885 hevc_qsv_decoder_deps="libmfx"
1886 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
1887 hevc_qsv_encoder_select="qsvenc"
1888 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1889 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1890 iac_decoder_select="imc_decoder"
1891 imc_decoder_select="bswapdsp fft mdct sinewin"
1892 indeo3_decoder_select="hpeldsp"
1893 indeo4_decoder_select="ividsp"
1894 indeo5_decoder_select="ividsp"
1895 interplay_video_decoder_select="hpeldsp"
1896 jpegls_decoder_select="golomb mjpeg_decoder"
1897 jpegls_encoder_select="golomb"
1898 jv_decoder_select="blockdsp"
1899 lagarith_decoder_select="huffyuvdsp"
1900 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1901 loco_decoder_select="golomb"
1902 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1903 metasound_decoder_select="lsp mdct sinewin"
1904 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1905 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1906 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1907 mjpegb_decoder_select="mjpeg_decoder"
1908 mlp_decoder_select="mlp_parser"
1909 motionpixels_decoder_select="bswapdsp"
1910 mp1_decoder_select="mpegaudio"
1911 mp1float_decoder_select="mpegaudio"
1912 mp2_decoder_select="mpegaudio"
1913 mp2float_decoder_select="mpegaudio"
1914 mp3_decoder_select="mpegaudio"
1915 mp3adu_decoder_select="mpegaudio"
1916 mp3adufloat_decoder_select="mpegaudio"
1917 mp3float_decoder_select="mpegaudio"
1918 mp3on4_decoder_select="mpegaudio"
1919 mp3on4float_decoder_select="mpegaudio"
1920 mpc7_decoder_select="bswapdsp mpegaudiodsp"
1921 mpc8_decoder_select="mpegaudiodsp"
1922 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
1923 mpeg_xvmc_decoder_select="mpeg2video_decoder"
1924 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
1925 mpeg1video_encoder_select="aandcttables mpegvideoenc"
1926 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
1927 mpeg2video_encoder_select="aandcttables mpegvideoenc"
1928 mpeg2_qsv_decoder_deps="libmfx"
1929 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
1930 mpeg2_qsv_encoder_deps="libmfx"
1931 mpeg2_qsv_encoder_select="qsvenc"
1932 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
1933 mpeg4_encoder_select="h263_encoder"
1934 msa1_decoder_select="mss34dsp"
1935 msmpeg4v1_decoder_select="h263_decoder"
1936 msmpeg4v2_decoder_select="h263_decoder"
1937 msmpeg4v2_encoder_select="h263_encoder"
1938 msmpeg4v3_decoder_select="h263_decoder"
1939 msmpeg4v3_encoder_select="h263_encoder"
1940 mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
1941 mts2_decoder_select="mss34dsp"
1942 mxpeg_decoder_select="mjpeg_decoder"
1943 nellymoser_decoder_select="mdct sinewin"
1944 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
1945 nuv_decoder_select="idctdsp lzo"
1946 on2avc_decoder_select="mdct"
1947 opus_decoder_deps="avresample"
1948 opus_decoder_select="imdct15"
1949 png_decoder_deps="zlib"
1950 png_encoder_deps="zlib"
1951 png_encoder_select="huffyuvencdsp"
1952 prores_decoder_select="idctdsp"
1953 prores_encoder_select="fdctdsp"
1954 qcelp_decoder_select="lsp"
1955 qdm2_decoder_select="mdct rdft mpegaudiodsp"
1956 ra_144_encoder_select="audio_frame_queue lpc"
1957 ralf_decoder_select="golomb"
1958 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
1959 rv10_encoder_select="h263_encoder"
1960 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
1961 rv20_encoder_select="h263_encoder"
1962 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
1963 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
1964 shorten_decoder_select="golomb"
1965 sipr_decoder_select="lsp"
1966 sp5x_decoder_select="mjpeg_decoder"
1967 svq1_decoder_select="hpeldsp"
1968 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
1969 svq3_decoder_select="h264_decoder hpeldsp tpeldsp"
1970 svq3_decoder_suggest="zlib"
1971 tak_decoder_select="audiodsp"
1972 tdsc_decoder_deps="zlib"
1973 tdsc_decoder_select="mjpeg_decoder"
1974 theora_decoder_select="vp3_decoder"
1975 thp_decoder_select="mjpeg_decoder"
1976 tiff_decoder_suggest="zlib"
1977 tiff_encoder_suggest="zlib"
1978 truehd_decoder_select="mlp_decoder"
1979 truemotion2_decoder_select="bswapdsp"
1980 truespeech_decoder_select="bswapdsp"
1981 tscc_decoder_deps="zlib"
1982 txd_decoder_select="texturedsp"
1983 twinvq_decoder_select="mdct lsp sinewin"
1984 utvideo_decoder_select="bswapdsp"
1985 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
1986 vble_decoder_select="huffyuvdsp"
1987 vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
1988 vc1image_decoder_select="vc1_decoder"
1989 vorbis_decoder_select="mdct"
1990 vorbis_encoder_select="mdct"
1991 vp3_decoder_select="hpeldsp vp3dsp videodsp"
1992 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
1993 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
1994 vp6a_decoder_select="vp6_decoder"
1995 vp6f_decoder_select="vp6_decoder"
1996 vp7_decoder_select="h264pred videodsp vp8dsp"
1997 vp8_decoder_select="h264pred videodsp vp8dsp"
1998 vp9_decoder_select="videodsp"
1999 webp_decoder_select="vp8_decoder"
2000 wmapro_decoder_select="mdct sinewin wma_freqs"
2001 wmav1_decoder_select="mdct sinewin wma_freqs"
2002 wmav1_encoder_select="mdct sinewin wma_freqs"
2003 wmav2_decoder_select="mdct sinewin wma_freqs"
2004 wmav2_encoder_select="mdct sinewin wma_freqs"
2005 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2006 wmv1_decoder_select="h263_decoder"
2007 wmv1_encoder_select="h263_encoder"
2008 wmv2_decoder_select="blockdsp h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2009 wmv2_encoder_select="h263_encoder wmv2dsp"
2010 wmv3_decoder_select="vc1_decoder"
2011 wmv3image_decoder_select="wmv3_decoder"
2012 zerocodec_decoder_deps="zlib"
2013 zlib_decoder_deps="zlib"
2014 zlib_encoder_deps="zlib"
2015 zmbv_decoder_deps="zlib"
2016 zmbv_encoder_deps="zlib"
2017
2018 # hardware accelerators
2019 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2020 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2021 vaapi_deps="va_va_h"
2022 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2023 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2024 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2025
2026 h263_vaapi_hwaccel_deps="vaapi"
2027 h263_vaapi_hwaccel_select="h263_decoder"
2028 h263_vdpau_hwaccel_deps="vdpau"
2029 h263_vdpau_hwaccel_select="h263_decoder"
2030 h264_d3d11va_hwaccel_deps="d3d11va"
2031 h264_d3d11va_hwaccel_select="h264_decoder"
2032 h264_dxva2_hwaccel_deps="dxva2"
2033 h264_dxva2_hwaccel_select="h264_decoder"
2034 h264_mmal_decoder_deps="mmal"
2035 h264_mmal_hwaccel_deps="mmal"
2036 h264_mmal_decoder_select="h264_decoder"
2037 h264_mmal_encoder_deps="mmal"
2038 h264_qsv_hwaccel_deps="libmfx"
2039 h264_vaapi_hwaccel_deps="vaapi"
2040 h264_vaapi_hwaccel_select="h264_decoder"
2041 h264_vda_hwaccel_deps="vda"
2042 h264_vda_hwaccel_select="h264_decoder"
2043 h264_vda_old_hwaccel_deps="vda"
2044 h264_vda_old_hwaccel_select="h264_decoder"
2045 h264_vdpau_hwaccel_deps="vdpau"
2046 h264_vdpau_hwaccel_select="h264_decoder"
2047 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2048 hevc_d3d11va_hwaccel_select="hevc_decoder"
2049 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2050 hevc_dxva2_hwaccel_select="hevc_decoder"
2051 hevc_qsv_hwaccel_deps="libmfx"
2052 mpeg1_vdpau_hwaccel_deps="vdpau"
2053 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2054 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2055 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2056 mpeg2_dxva2_hwaccel_deps="dxva2"
2057 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2058 mpeg2_qsv_hwaccel_deps="libmfx"
2059 mpeg2_vaapi_hwaccel_deps="vaapi"
2060 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2061 mpeg2_vdpau_hwaccel_deps="vdpau"
2062 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2063 mpeg4_vaapi_hwaccel_deps="vaapi"
2064 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2065 mpeg4_vdpau_hwaccel_deps="vdpau"
2066 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2067 vc1_d3d11va_hwaccel_deps="d3d11va"
2068 vc1_d3d11va_hwaccel_select="vc1_decoder"
2069 vc1_dxva2_hwaccel_deps="dxva2"
2070 vc1_dxva2_hwaccel_select="vc1_decoder"
2071 vc1_vaapi_hwaccel_deps="vaapi"
2072 vc1_vaapi_hwaccel_select="vc1_decoder"
2073 vc1_vdpau_hwaccel_deps="vdpau"
2074 vc1_vdpau_hwaccel_select="vc1_decoder"
2075 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2076 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2077 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2078 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2079
2080 # parsers
2081 h264_parser_select="h264_decoder"
2082 hevc_parser_select="golomb"
2083 mpegvideo_parser_select="mpegvideo"
2084 mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
2085 vc1_parser_select="mpegvideo startcode vc1_decoder"
2086
2087 # bitstream_filters
2088 mjpeg2jpeg_bsf_select="jpegtables"
2089
2090 # external libraries
2091 libdcadec_decoder_deps="libdcadec"
2092 libfaac_encoder_deps="libfaac"
2093 libfaac_encoder_select="audio_frame_queue"
2094 libfdk_aac_decoder_deps="libfdk_aac"
2095 libfdk_aac_encoder_deps="libfdk_aac"
2096 libfdk_aac_encoder_select="audio_frame_queue"
2097 libgsm_decoder_deps="libgsm"
2098 libgsm_encoder_deps="libgsm"
2099 libgsm_ms_decoder_deps="libgsm"
2100 libgsm_ms_encoder_deps="libgsm"
2101 libilbc_decoder_deps="libilbc"
2102 libilbc_encoder_deps="libilbc"
2103 libmp3lame_encoder_deps="libmp3lame"
2104 libmp3lame_encoder_select="audio_frame_queue"
2105 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2106 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2107 libopencore_amrnb_encoder_select="audio_frame_queue"
2108 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2109 libopenh264_encoder_deps="libopenh264"
2110 libopenjpeg_decoder_deps="libopenjpeg"
2111 libopenjpeg_encoder_deps="libopenjpeg"
2112 libopus_decoder_deps="libopus"
2113 libopus_encoder_deps="libopus"
2114 libopus_encoder_select="audio_frame_queue"
2115 libschroedinger_decoder_deps="libschroedinger"
2116 libschroedinger_encoder_deps="libschroedinger"
2117 libspeex_decoder_deps="libspeex"
2118 libspeex_encoder_deps="libspeex"
2119 libspeex_encoder_select="audio_frame_queue"
2120 libtheora_encoder_deps="libtheora"
2121 libtwolame_encoder_deps="libtwolame"
2122 libvo_aacenc_encoder_deps="libvo_aacenc"
2123 libvo_aacenc_encoder_select="audio_frame_queue"
2124 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2125 libvorbis_encoder_deps="libvorbis"
2126 libvorbis_encoder_select="audio_frame_queue"
2127 libvpx_vp8_decoder_deps="libvpx"
2128 libvpx_vp8_encoder_deps="libvpx"
2129 libvpx_vp9_decoder_deps="libvpx"
2130 libvpx_vp9_encoder_deps="libvpx"
2131 libwavpack_encoder_deps="libwavpack"
2132 libwebp_encoder_deps="libwebp"
2133 libx262_encoder_deps="libx262"
2134 libx264_encoder_deps="libx264"
2135 libx265_encoder_deps="libx265"
2136 libxavs_encoder_deps="libxavs"
2137 libxvid_encoder_deps="libxvid"
2138
2139 # demuxers / muxers
2140 ac3_demuxer_select="ac3_parser"
2141 asf_demuxer_select="riffdec"
2142 asf_muxer_select="riffenc"
2143 asf_stream_muxer_select="asf_muxer"
2144 avi_demuxer_select="riffdec"
2145 avi_muxer_select="riffenc"
2146 avisynth_demuxer_deps="avisynth"
2147 avisynth_demuxer_select="riffdec"
2148 caf_demuxer_select="riffdec"
2149 dash_muxer_select="mp4_muxer"
2150 dirac_demuxer_select="dirac_parser"
2151 dv_demuxer_select="dvprofile"
2152 dv_muxer_select="dvprofile"
2153 dxa_demuxer_select="riffdec"
2154 eac3_demuxer_select="ac3_parser"
2155 f4v_muxer_select="mov_muxer"
2156 flac_demuxer_select="flac_parser"
2157 hds_muxer_select="flv_muxer"
2158 hls_muxer_select="mpegts_muxer"
2159 ipod_muxer_select="mov_muxer"
2160 ismv_muxer_select="mov_muxer"
2161 matroska_audio_muxer_select="matroska_muxer"
2162 matroska_demuxer_select="riffdec"
2163 matroska_demuxer_suggest="bzlib lzo zlib"
2164 matroska_muxer_select="riffenc"
2165 mmf_muxer_select="riffenc"
2166 mov_demuxer_select="riffdec"
2167 mov_demuxer_suggest="zlib"
2168 mov_muxer_select="riffenc rtpenc_chain"
2169 mp3_demuxer_select="mpegaudio_parser"
2170 mp4_muxer_select="mov_muxer"
2171 mpegts_muxer_select="adts_muxer latm_muxer"
2172 mpegtsraw_demuxer_select="mpegts_demuxer"
2173 mxf_d10_muxer_select="mxf_muxer"
2174 nut_muxer_select="riffenc"
2175 nuv_demuxer_select="riffdec"
2176 oga_muxer_select="ogg_muxer"
2177 ogg_demuxer_select="golomb"
2178 opus_muxer_select="ogg_muxer"
2179 psp_muxer_select="mov_muxer"
2180 rtp_demuxer_select="sdp_demuxer"
2181 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol"
2182 rtsp_demuxer_select="http_protocol rtpdec"
2183 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2184 sap_demuxer_select="sdp_demuxer"
2185 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2186 sdp_demuxer_select="rtpdec"
2187 smoothstreaming_muxer_select="ismv_muxer"
2188 spdif_muxer_select="aac_parser"
2189 spx_muxer_select="ogg_muxer"
2190 tak_demuxer_select="tak_parser"
2191 tg2_muxer_select="mov_muxer"
2192 tgp_muxer_select="mov_muxer"
2193 w64_demuxer_select="wav_demuxer"
2194 wav_demuxer_select="riffdec"
2195 wav_muxer_select="riffenc"
2196 webm_muxer_select="riffenc"
2197 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2198 wtv_demuxer_select="riffdec"
2199 xmv_demuxer_select="riffdec"
2200 xwma_demuxer_select="riffdec"
2201
2202 # indevs / outdevs
2203 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2204 alsa_outdev_deps="alsa_asoundlib_h"
2205 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2206 dv1394_indev_deps="dv1394"
2207 dv1394_indev_select="dv_demuxer"
2208 fbdev_indev_deps="linux_fb_h"
2209 jack_indev_deps="jack_jack_h pthreads"
2210 libcdio_indev_deps="libcdio"
2211 libdc1394_indev_deps="libdc1394"
2212 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2213 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2214 pulse_indev_deps="libpulse"
2215 sndio_indev_deps="sndio_h"
2216 sndio_outdev_deps="sndio_h"
2217 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2218 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2219 vfwcap_indev_extralibs="-lavicap32"
2220 x11grab_indev_deps="x11grab"
2221 x11grab_xcb_indev_deps="libxcb"
2222
2223 # protocols
2224 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2225 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2226 ffrtmpcrypt_protocol_select="tcp_protocol"
2227 ffrtmphttp_protocol_deps="!librtmp_protocol"
2228 ffrtmphttp_protocol_select="http_protocol"
2229 gopher_protocol_select="network"
2230 http_protocol_select="tcp_protocol"
2231 httpproxy_protocol_select="tcp_protocol"
2232 https_protocol_select="tls_protocol"
2233 icecast_protocol_select="http_protocol"
2234 librtmp_protocol_deps="librtmp"
2235 librtmpe_protocol_deps="librtmp"
2236 librtmps_protocol_deps="librtmp"
2237 librtmpt_protocol_deps="librtmp"
2238 librtmpte_protocol_deps="librtmp"
2239 mmsh_protocol_select="http_protocol"
2240 mmst_protocol_select="network"
2241 rtmp_protocol_deps="!librtmp_protocol"
2242 rtmp_protocol_select="tcp_protocol"
2243 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2244 rtmps_protocol_deps="!librtmp_protocol"
2245 rtmps_protocol_select="tls_protocol"
2246 rtmpt_protocol_select="ffrtmphttp_protocol"
2247 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2248 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2249 rtp_protocol_select="udp_protocol"
2250 sctp_protocol_deps="struct_sctp_event_subscribe"
2251 sctp_protocol_select="network"
2252 srtp_protocol_select="rtp_protocol"
2253 tcp_protocol_select="network"
2254 tls_gnutls_protocol_deps="gnutls"
2255 tls_gnutls_protocol_select="tcp_protocol"
2256 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2257 tls_openssl_protocol_select="tcp_protocol"
2258 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2259 udp_protocol_select="network"
2260 unix_protocol_deps="sys_un_h"
2261 unix_protocol_select="network"
2262
2263 # filters
2264 blackframe_filter_deps="gpl"
2265 boxblur_filter_deps="gpl"
2266 bs2b_filter_deps="libbs2b"
2267 cropdetect_filter_deps="gpl"
2268 delogo_filter_deps="gpl"
2269 drawtext_filter_deps="libfreetype"
2270 frei0r_filter_deps="frei0r dlopen"
2271 frei0r_filter_extralibs='$ldl'
2272 frei0r_src_filter_deps="frei0r dlopen"
2273 frei0r_src_filter_extralibs='$ldl'
2274 hqdn3d_filter_deps="gpl"
2275 interlace_filter_deps="gpl"
2276 ocv_filter_deps="libopencv"
2277 resample_filter_deps="avresample"
2278 scale_filter_deps="swscale"
2279
2280 # examples
2281 avcodec_example_deps="avcodec avutil"
2282 filter_audio_example_deps="avfilter avutil"
2283 metadata_example_deps="avformat avutil"
2284 output_example_deps="avcodec avformat avutil swscale"
2285 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2286 transcode_aac_example_deps="avcodec avformat avresample"
2287
2288 # libraries, in linking order
2289 avcodec_deps="avutil"
2290 avdevice_deps="avformat avcodec avutil"
2291 avfilter_deps="avutil"
2292 avformat_deps="avcodec avutil"
2293 avresample_deps="avutil"
2294 swscale_deps="avutil"
2295
2296 # programs
2297 avconv_deps="avcodec avfilter avformat avresample swscale"
2298 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2299                fps_filter null_filter resample_filter scale_filter
2300                setpts_filter trim_filter"
2301 avplay_deps="avcodec avformat avresample swscale sdl"
2302 avplay_libs='$sdl_libs'
2303 avplay_select="rdft transpose_filter hflip_filter vflip_filter"
2304 avprobe_deps="avcodec avformat"
2305
2306 # documentation
2307 pod2man_deps="doc"
2308 texi2html_deps="doc"
2309
2310 # default parameters
2311
2312 logfile="config.log"
2313
2314 # installation paths
2315 prefix_default="/usr/local"
2316 bindir_default='${prefix}/bin'
2317 datadir_default='${prefix}/share/avconv'
2318 docdir_default='${prefix}/share/doc/libav'
2319 incdir_default='${prefix}/include'
2320 libdir_default='${prefix}/lib'
2321 mandir_default='${prefix}/share/man'
2322 shlibdir_default="$libdir_default"
2323
2324 # toolchain
2325 ar_default="ar"
2326 cc_default="gcc"
2327 host_cc_default="gcc"
2328 cp_f="cp -f"
2329 ln_s="ln -s -f"
2330 nm_default="nm -g"
2331 objformat="elf"
2332 pkg_config_default=pkg-config
2333 ranlib="ranlib"
2334 strip="strip"
2335 yasmexe="yasm"
2336
2337 # machine
2338 arch_default=$(uname -m)
2339 cpu="generic"
2340 intrinsics="none"
2341
2342 # OS
2343 target_os_default=$(tolower $(uname -s))
2344 host_os=$target_os_default
2345
2346 # configurable options
2347 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2348
2349 enable asm
2350 enable debug
2351 enable doc
2352 enable faan faandct faanidct
2353 enable optimizations
2354 enable safe_bitstream_reader
2355 enable static
2356 enable swscale_alpha
2357 enable valgrind_backtrace
2358
2359 # By default, enable only those hwaccels that have no external dependencies.
2360 enable d3d11va dxva2 vda vdpau
2361
2362 # build settings
2363 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2364 LIBPREF="lib"
2365 LIBSUF=".a"
2366 FULLNAME='$(NAME)$(BUILDSUF)'
2367 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2368 SLIBPREF="lib"
2369 SLIBSUF=".so"
2370 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2371 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2372 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2373 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2374 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2375 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2376
2377 asflags_filter=echo
2378 cflags_filter=echo
2379 ldflags_filter=echo
2380
2381 AS_C='-c'
2382 AS_O='-o $@'
2383 CC_C='-c'
2384 CC_E='-E -o $@'
2385 CC_O='-o $@'
2386 LD_O='-o $@'
2387 LD_LIB='-l%'
2388 LD_PATH='-L'
2389 HOSTCC_C='-c'
2390 HOSTCC_E='-E -o $@'
2391 HOSTCC_O='-o $@'
2392 HOSTLD_O='-o $@'
2393
2394 host_libs='-lm'
2395 host_cflags_filter=echo
2396 host_ldflags_filter=echo
2397
2398 target_path='$(CURDIR)'
2399
2400 # since the object filename is not given with the -MM flag, the compiler
2401 # is only able to print the basename, and we must add the path ourselves
2402 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2403 DEPFLAGS='-MM'
2404
2405 # find source path
2406 if test -f configure; then
2407     source_path=.
2408 else
2409     source_path=$(cd $(dirname "$0"); pwd)
2410     echo "$source_path" | grep -q '[[:blank:]]' &&
2411         die "Out of tree builds are impossible with whitespace in source path."
2412     test -e "$source_path/config.h" &&
2413         die "Out of tree builds are impossible with config.h in source dir."
2414 fi
2415
2416 for v in "$@"; do
2417     r=${v#*=}
2418     l=${v%"$r"}
2419     r=$(sh_quote "$r")
2420     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2421 done
2422
2423 find_things(){
2424     thing=$1
2425     pattern=$2
2426     file=$source_path/$3
2427     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2428 }
2429
2430 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2431 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2432 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2433 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2434 BSF_LIST=$(find_things      bsf      BSF      libavcodec/allcodecs.c)
2435 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2436 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2437 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2438 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2439 PROTOCOL_LIST=$(find_things protocol PROTOCOL libavformat/allformats.c)
2440 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2441
2442 ALL_COMPONENTS="
2443     $BSF_LIST
2444     $DECODER_LIST
2445     $DEMUXER_LIST
2446     $ENCODER_LIST
2447     $FILTER_LIST
2448     $HWACCEL_LIST
2449     $INDEV_LIST
2450     $MUXER_LIST
2451     $OUTDEV_LIST
2452     $PARSER_LIST
2453     $PROTOCOL_LIST
2454 "
2455
2456 for n in $COMPONENT_LIST; do
2457     v=$(toupper ${n%s})_LIST
2458     eval enable \$$v
2459     eval ${n}_if_any="\$$v"
2460 done
2461
2462 enable $ARCH_EXT_LIST
2463
2464 die_unknown(){
2465     echo "Unknown option \"$1\"."
2466     echo "See $0 --help for available options."
2467     exit 1
2468 }
2469
2470 print_3_columns() {
2471     cat | tr ' ' '\n' | sort | pr -r -3 -t
2472 }
2473
2474 show_list() {
2475     suffix=_$1
2476     shift
2477     echo $* | sed s/$suffix//g | print_3_columns
2478     exit 0
2479 }
2480
2481 rand_list(){
2482     IFS=', '
2483     set -- $*
2484     unset IFS
2485     for thing; do
2486         comp=${thing%:*}
2487         prob=${thing#$comp}
2488         prob=${prob#:}
2489         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2490         echo "prob ${prob:-0.5}"
2491         printf '%s\n' $comp
2492     done
2493 }
2494
2495 do_random(){
2496     action=$1
2497     shift
2498     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2499     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2500 }
2501
2502 for opt do
2503     optval="${opt#*=}"
2504     case "$opt" in
2505         --extra-ldflags=*)
2506             add_ldflags $optval
2507         ;;
2508         --extra-ldexeflags=*)
2509             add_ldexeflags $optval
2510         ;;
2511         --extra-libs=*)
2512             add_extralibs $optval
2513         ;;
2514         --disable-devices)
2515             disable $INDEV_LIST $OUTDEV_LIST
2516         ;;
2517         --enable-debug=*)
2518             debuglevel="$optval"
2519         ;;
2520         --disable-programs)
2521             disable $PROGRAM_LIST
2522         ;;
2523         --disable-everything)
2524             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2525         ;;
2526         --disable-all)
2527             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2528             disable $LIBRARY_LIST $PROGRAM_LIST doc
2529         ;;
2530         --enable-random|--disable-random)
2531             action=${opt%%-random}
2532             do_random ${action#--} $COMPONENT_LIST
2533         ;;
2534         --enable-random=*|--disable-random=*)
2535             action=${opt%%-random=*}
2536             do_random ${action#--} $optval
2537         ;;
2538         --enable-*=*|--disable-*=*)
2539             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2540             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2541             eval list=\$$(toupper $thing)_LIST
2542             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2543             $action $(filter "$name" $list)
2544         ;;
2545         --enable-avserver|--disable-avserver*)
2546             warn "avserver has been removed, the ${opt} option is only"\
2547                  "provided for compatibility and will be removed in the future"
2548         ;;
2549         --enable-?*|--disable-?*)
2550             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2551             if is_in $option $COMPONENT_LIST; then
2552                 test $action = disable && action=unset
2553                 eval $action \$$(toupper ${option%s})_LIST
2554             elif is_in $option $CMDLINE_SELECT; then
2555                 $action $option
2556             else
2557                 die_unknown $opt
2558             fi
2559         ;;
2560         --list-*)
2561             NAME="${opt#--list-}"
2562             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2563             NAME=${NAME%s}
2564             eval show_list $NAME \$$(toupper $NAME)_LIST
2565         ;;
2566         --help|-h) show_help
2567         ;;
2568         *)
2569             optname="${opt%%=*}"
2570             optname="${optname#--}"
2571             optname=$(echo "$optname" | sed 's/-/_/g')
2572             if is_in $optname $CMDLINE_SET; then
2573                 eval $optname='$optval'
2574             elif is_in $optname $CMDLINE_APPEND; then
2575                 append $optname "$optval"
2576             else
2577                 die_unknown $opt
2578             fi
2579         ;;
2580     esac
2581 done
2582
2583 for e in $env; do
2584     eval "export $e"
2585 done
2586
2587 disabled logging && logfile=/dev/null
2588
2589 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2590 set >> $logfile
2591
2592 case "$toolchain" in
2593     clang-asan)
2594         cc_default="clang"
2595         add_cflags  -fsanitize=address
2596         add_ldflags -fsanitize=address
2597     ;;
2598     clang-tsan)
2599         cc_default="clang"
2600         add_cflags  -fsanitize=thread -pie
2601         add_ldflags -fsanitize=thread -pie
2602     ;;
2603     clang-usan)
2604         cc_default="clang"
2605         add_cflags  -fsanitize=undefined -O1
2606         add_ldflags -fsanitize=undefined
2607     ;;
2608     gcc-asan)
2609         cc_default="gcc"
2610         add_cflags  -fsanitize=address
2611         add_ldflags -fsanitize=address
2612     ;;
2613     gcc-tsan)
2614         cc_default="gcc"
2615         add_cflags  -fsanitize=thread -pie -fPIC
2616         add_ldflags -fsanitize=thread -pie -fPIC
2617     ;;
2618     gcc-usan)
2619         cc_default="gcc"
2620         add_cflags  -fsanitize=undefined
2621         add_ldflags -fsanitize=undefined
2622     ;;
2623     valgrind-massif)
2624         target_exec_default="valgrind"
2625         target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2626     ;;
2627     valgrind-memcheck)
2628         target_exec_default="valgrind"
2629         target_exec_args="--track-origins=yes --leak-check=full"
2630     ;;
2631     msvc)
2632         # Check whether the current MSVC version needs the C99 converter.
2633         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2634         # support enough of C99 to build libav. Default to the new
2635         # behaviour if the regexp was unable to match anything, since this
2636         # successfully parses the version number of existing supported
2637         # versions that require the converter (MSVC 2010 and 2012).
2638         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2639         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2640             cc_default="cl"
2641         else
2642             cc_default="c99wrap cl"
2643         fi
2644         ld_default="$source_path/compat/windows/mslink"
2645         nm_default="dumpbin -symbols"
2646         ar_default="lib"
2647         case "$arch" in
2648         arm*)
2649             as_default="armasm"
2650             ;;
2651         esac
2652         target_os_default="win32"
2653         # Use a relative path for TMPDIR. This makes sure all the
2654         # ffconf temp files are written with a relative path, avoiding
2655         # issues with msys/win32 path conversion for MSVC parameters
2656         # such as -Fo<file> or -out:<file>.
2657         TMPDIR=.
2658     ;;
2659     icl)
2660         cc_default="icl"
2661         ld_default="xilink"
2662         nm_default="dumpbin -symbols"
2663         ar_default="xilib"
2664         target_os_default="win32"
2665         TMPDIR=.
2666     ;;
2667     gcov)
2668         add_cflags  -fprofile-arcs -ftest-coverage
2669         add_ldflags -fprofile-arcs -ftest-coverage
2670     ;;
2671     hardened)
2672         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2673         add_cflags   -fno-strict-overflow -fstack-protector-all
2674         add_ldflags  -Wl,-z,relro -Wl,-z,now
2675     ;;
2676     ?*)
2677         die "Unknown toolchain $toolchain"
2678     ;;
2679 esac
2680
2681 test -n "$cross_prefix" && enable cross_compile
2682
2683 if enabled cross_compile; then
2684     test -n "$arch" && test -n "$target_os" ||
2685         die "Must specify target arch and OS when cross-compiling"
2686 fi
2687
2688 ar_default="${cross_prefix}${ar_default}"
2689 cc_default="${cross_prefix}${cc_default}"
2690 nm_default="${cross_prefix}${nm_default}"
2691 pkg_config_default="${cross_prefix}${pkg_config_default}"
2692 ranlib="${cross_prefix}${ranlib}"
2693 strip="${cross_prefix}${strip}"
2694
2695 sysinclude_default="${sysroot}/usr/include"
2696
2697 set_default arch cc pkg_config sysinclude target_exec target_os
2698 enabled cross_compile || host_cc_default=$cc
2699 set_default host_cc
2700
2701 if ! $pkg_config --version >/dev/null 2>&1; then
2702     warn "$pkg_config not found, library detection may fail."
2703     pkg_config=false
2704 fi
2705
2706 exesuf() {
2707     case $1 in
2708         mingw32*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2709     esac
2710 }
2711
2712 EXESUF=$(exesuf $target_os)
2713 HOSTEXESUF=$(exesuf $host_os)
2714
2715 # set temporary file name
2716 : ${TMPDIR:=$TEMPDIR}
2717 : ${TMPDIR:=$TMP}
2718 : ${TMPDIR:=/tmp}
2719
2720 if ! check_cmd mktemp -u XXXXXX; then
2721     # simple replacement for missing mktemp
2722     # NOT SAFE FOR GENERAL USE
2723     mktemp(){
2724         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2725     }
2726 fi
2727
2728 tmpfile(){
2729     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2730         (set -C; exec > $tmp) 2>/dev/null ||
2731         die "Unable to create temporary file in $TMPDIR."
2732     append TMPFILES $tmp
2733     eval $1=$tmp
2734 }
2735
2736 trap 'rm -f -- $TMPFILES' EXIT
2737
2738 tmpfile TMPASM .asm
2739 tmpfile TMPC   .c
2740 tmpfile TMPE   $EXESUF
2741 tmpfile TMPH   .h
2742 tmpfile TMPO   .o
2743 tmpfile TMPS   .S
2744 tmpfile TMPSH  .sh
2745 tmpfile TMPV   .ver
2746
2747 unset -f mktemp
2748
2749 chmod +x $TMPE
2750
2751 # make sure we can execute files in $TMPDIR
2752 cat > $TMPSH 2>> $logfile <<EOF
2753 #! /bin/sh
2754 EOF
2755 chmod +x $TMPSH >> $logfile 2>&1
2756 if ! $TMPSH >> $logfile 2>&1; then
2757     cat <<EOF
2758 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2759 variable to another directory and make sure that it is not mounted noexec.
2760 EOF
2761     die "Sanity test failed."
2762 fi
2763
2764 armasm_flags(){
2765     for flag; do
2766         case $flag in
2767             # Filter out MSVC cl.exe options from cflags that shouldn't
2768             # be passed to gas-preprocessor
2769             -M[TD]*)                                            ;;
2770             *)                  echo $flag                      ;;
2771         esac
2772    done
2773 }
2774
2775 ccc_flags(){
2776     for flag; do
2777         case $flag in
2778             -std=c99)           echo -c99                       ;;
2779             -mcpu=*)            echo -arch ${flag#*=}           ;;
2780             -mieee)             echo -ieee                      ;;
2781             -O*|-fast)          echo $flag                      ;;
2782             -fno-math-errno)    echo -assume nomath_errno       ;;
2783             -g)                 echo -g3                        ;;
2784             -Wall)              echo -msg_enable level2         ;;
2785             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2786             -Wl,*)              echo $flag                      ;;
2787             -f*|-W*)                                            ;;
2788             *)                  echo $flag                      ;;
2789         esac
2790    done
2791 }
2792
2793 cparser_flags(){
2794     for flag; do
2795         case $flag in
2796             -Wno-switch)             echo -Wno-switch-enum ;;
2797             -Wno-format-zero-length) ;;
2798             -Wdisabled-optimization) ;;
2799             -Wno-pointer-sign)       echo -Wno-other ;;
2800             *)                       echo $flag ;;
2801         esac
2802     done
2803 }
2804
2805 msvc_common_flags(){
2806     for flag; do
2807         case $flag in
2808             # In addition to specifying certain flags under the compiler
2809             # specific filters, they must be specified here as well or else the
2810             # generic catch all at the bottom will print the original flag.
2811             -Wall)                ;;
2812             -std=c99)             ;;
2813             # Common flags
2814             -fomit-frame-pointer) ;;
2815             -g)                   echo -Z7 ;;
2816             -fno-math-errno)      ;;
2817             -fno-common)          ;;
2818             -fno-signed-zeros)    ;;
2819             -fPIC)                ;;
2820             -mthumb)              ;;
2821             -march=*)             ;;
2822             -lz)                  echo zlib.lib ;;
2823             -lavifil32)           echo vfw32.lib ;;
2824             -lavicap32)           echo vfw32.lib user32.lib ;;
2825             -l*)                  echo ${flag#-l}.lib ;;
2826             -L*)                  echo -libpath:${flag#-L} ;;
2827             *)                    echo $flag ;;
2828         esac
2829     done
2830 }
2831
2832 msvc_flags(){
2833     msvc_common_flags "$@"
2834     for flag; do
2835         case $flag in
2836             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
2837                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
2838                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
2839                                        -wd4273 -wd4554 -wd4701 ;;
2840         esac
2841     done
2842 }
2843
2844 icl_flags(){
2845     msvc_common_flags "$@"
2846     for flag; do
2847         case $flag in
2848             # Despite what Intel's documentation says -Wall, which is supported
2849             # on Windows, does enable remarks so disable them here.
2850             -Wall)                echo $flag -Qdiag-disable:remark ;;
2851             -std=c99)             echo -Qstd=c99 ;;
2852         esac
2853     done
2854 }
2855
2856 pgi_flags(){
2857     for flag; do
2858         case $flag in
2859             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
2860             -fomit-frame-pointer) echo -Mnoframe ;;
2861             -g)                   echo -gopt ;;
2862             *)                    echo $flag ;;
2863         esac
2864     done
2865 }
2866
2867 suncc_flags(){
2868     for flag; do
2869         case $flag in
2870             -march=*|-mcpu=*)
2871                 case "${flag#*=}" in
2872                     native)                   echo -xtarget=native       ;;
2873                     v9|niagara)               echo -xarch=sparc          ;;
2874                     ultrasparc)               echo -xarch=sparcvis       ;;
2875                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
2876                     i586|pentium)             echo -xchip=pentium        ;;
2877                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
2878                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
2879                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
2880                     pentium4*)          echo -xtarget=pentium4           ;;
2881                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
2882                     *-sse3)             echo -xarch=sse3                 ;;
2883                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
2884                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
2885                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
2886                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
2887                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
2888                     k8|opteron|athlon64|athlon-fx)
2889                                                echo -xarch=sse2a         ;;
2890                     athlon*)                   echo -xarch=pentium_proa  ;;
2891                 esac
2892                 ;;
2893             -std=c99)             echo -xc99              ;;
2894             -fomit-frame-pointer) echo -xregs=frameptr    ;;
2895             -fPIC)                echo -KPIC -xcode=pic32 ;;
2896             -W*,*)                echo $flag              ;;
2897             -f*-*|-W*|-mimpure-text)                      ;;
2898             -shared)              echo -G                 ;;
2899             *)                    echo $flag              ;;
2900         esac
2901     done
2902 }
2903
2904 tms470_flags(){
2905     for flag; do
2906         case $flag in
2907             -march=*|-mcpu=*)
2908                 case "${flag#*=}" in
2909                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
2910                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
2911                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
2912                     armv6*|arm11*)          echo -mv=6   ;;
2913                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
2914                                             echo -mv=5e  ;;
2915                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
2916                 esac
2917                 ;;
2918             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
2919             -mfpu=vfp)      echo --float_support=vfpv2        ;;
2920             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
2921             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
2922             -msoft-float)   echo --float_support=vfplib       ;;
2923             -O[0-3]|-mf=*)  echo $flag                        ;;
2924             -g)             echo -g -mn                       ;;
2925             -pds=*)         echo $flag                        ;;
2926             -D*|-I*)        echo $flag                        ;;
2927             --gcc|--abi=*)  echo $flag                        ;;
2928             -me)            echo $flag                        ;;
2929         esac
2930     done
2931 }
2932
2933 probe_cc(){
2934     pfx=$1
2935     _cc=$2
2936
2937     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
2938     unset _ld_o _ldflags _ld_lib _ld_path
2939     unset _depflags _DEPCMD _DEPFLAGS
2940     _flags_filter=echo
2941
2942     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
2943         _type=llvm_gcc
2944         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
2945         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
2946         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2947         _cflags_speed='-O3'
2948         _cflags_size='-Os'
2949     elif $_cc -v 2>&1 | grep -qi ^gcc; then
2950         _type=gcc
2951         gcc_version=$($_cc --version | head -n1)
2952         gcc_basever=$($_cc -dumpversion)
2953         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
2954         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
2955         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
2956         if ! $_cc -dumpversion | grep -q '^2\.'; then
2957             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
2958         fi
2959         _cflags_speed='-O3'
2960         _cflags_size='-Os'
2961     elif $_cc --version 2>/dev/null | grep -q ^icc; then
2962         _type=icc
2963         _ident=$($_cc --version | head -n1)
2964         _depflags='-MMD'
2965         _cflags_speed='-O3'
2966         _cflags_size='-Os'
2967         _cflags_noopt='-O1'
2968     elif $_cc -v 2>&1 | grep -q xlc; then
2969         _type=xlc
2970         _ident=$($_cc -qversion 2>/dev/null | head -n1)
2971         _cflags_speed='-O5'
2972         _cflags_size='-O5 -qcompact'
2973     elif $_cc -V 2>/dev/null | grep -q Compaq; then
2974         _type=ccc
2975         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
2976         _DEPFLAGS='-M'
2977         _cflags_speed='-fast'
2978         _cflags_size='-O1'
2979         _flags_filter=ccc_flags
2980     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
2981         test -d "$sysroot" || die "No valid sysroot specified."
2982         _type=armcc
2983         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
2984         armcc_conf="$PWD/armcc.conf"
2985         $_cc --arm_linux_configure                 \
2986              --arm_linux_config_file="$armcc_conf" \
2987              --configure_sysroot="$sysroot"        \
2988              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
2989              die "Error creating armcc configuration file."
2990         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
2991         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
2992         as_default="${cross_prefix}gcc"
2993         _depflags='-MMD'
2994         _cflags_speed='-O3'
2995         _cflags_size='-Os'
2996     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
2997         _type=tms470
2998         _ident=$($_cc -version | head -n1 | tr -s ' ')
2999         _flags='--gcc --abi=eabi -me'
3000         _cc_e='-ppl -fe=$@'
3001         _cc_o='-fe=$@'
3002         _depflags='-ppa -ppd=$(@:.o=.d)'
3003         _cflags_speed='-O3 -mf=5'
3004         _cflags_size='-O3 -mf=2'
3005         _flags_filter=tms470_flags
3006     elif $_cc -v 2>&1 | grep -q clang; then
3007         _type=clang
3008         _ident=$($_cc --version 2>/dev/null | head -n1)
3009         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3010         _cflags_speed='-O3'
3011         _cflags_size='-Os'
3012     elif $_cc -V 2>&1 | grep -q Sun; then
3013         _type=suncc
3014         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3015         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3016         _DEPFLAGS='-xM1 -xc99'
3017         _ldflags='-std=c99'
3018         _cflags_speed='-O5'
3019         _cflags_size='-O5 -xspace'
3020         _flags_filter=suncc_flags
3021     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3022         _type=pathscale
3023         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3024         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3025         _cflags_speed='-O2'
3026         _cflags_size='-Os'
3027         _flags_filter='filter_out -Wdisabled-optimization'
3028     elif $_cc -v 2>&1 | grep -q Open64; then
3029         _type=open64
3030         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3031         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3032         _cflags_speed='-O2'
3033         _cflags_size='-Os'
3034         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3035     elif $_cc -V 2>&1 | grep -q Portland; then
3036         _type=pgi
3037         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3038         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3039         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3040         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3041         _cflags_noopt="-O1"
3042         _flags_filter=pgi_flags
3043     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3044         _type=armasm
3045         _ident=$($_cc | head -n1)
3046         # 4509: "This form of conditional instruction is deprecated"
3047         _flags="-nologo -ignore 4509"
3048         _flags_filter=armasm_flags
3049     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3050         _type=msvc
3051         _ident=$($_cc 2>&1 | head -n1)
3052         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3053         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3054         _cflags_speed="-O2"
3055         _cflags_size="-O1"
3056         if $_cc -nologo- 2>&1 | grep -q Linker; then
3057             _ld_o='-out:$@'
3058         else
3059             _ld_o='-Fe$@'
3060         fi
3061         _cc_o='-Fo$@'
3062         _cc_e='-P -Fi$@'
3063         _flags_filter=msvc_flags
3064         _ld_lib='lib%.a'
3065         _ld_path='-libpath:'
3066         _flags='-nologo'
3067         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS'
3068     elif $_cc 2>&1 | grep -q Intel; then
3069         _type=icl
3070         _ident=$($_cc 2>&1 | head -n1)
3071         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3072         # Not only is O3 broken on 13.x+ but it is slower on all previous
3073         # versions (tested) as well.
3074         _cflags_speed="-O2"
3075         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3076         if $_cc 2>&1 | grep -q Linker; then
3077             _ld_o='-out:$@'
3078         else
3079             _ld_o='-Fe$@'
3080         fi
3081         _cc_o='-Fo$@'
3082         _cc_e='-P'
3083         _flags_filter=icl_flags
3084         _ld_lib='lib%.a'
3085         _ld_path='-libpath:'
3086         # -Qdiag-error to make icl error when seeing certain unknown arguments
3087         _flags='-nologo -Qdiag-error:4044,10157'
3088         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3089         # with MSVC which enables it by default.
3090         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3091     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3092         _type=cparser
3093         _ident=$($_cc --version | head -n1)
3094         _depflags='-MMD'
3095         _cflags_speed='-O4'
3096         _cflags_size='-O2'
3097         _flags_filter=cparser_flags
3098     fi
3099
3100     eval ${pfx}_type=\$_type
3101     eval ${pfx}_ident=\$_ident
3102 }
3103
3104 set_ccvars(){
3105     eval ${1}_C=\${_cc_c-\${${1}_C}}
3106     eval ${1}_E=\${_cc_e-\${${1}_E}}
3107     eval ${1}_O=\${_cc_o-\${${1}_O}}
3108
3109     if [ -n "$_depflags" ]; then
3110         eval ${1}_DEPFLAGS=\$_depflags
3111     else
3112         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3113         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3114         eval DEP${1}FLAGS=\$_flags
3115     fi
3116 }
3117
3118 probe_cc cc "$cc"
3119 cflags_filter=$_flags_filter
3120 cflags_speed=$_cflags_speed
3121 cflags_size=$_cflags_size
3122 cflags_noopt=$_cflags_noopt
3123 add_cflags $_flags $_cflags
3124 cc_ldflags=$_ldflags
3125 set_ccvars CC
3126
3127 probe_cc hostcc "$host_cc"
3128 host_cflags_filter=$_flags_filter
3129 add_host_cflags  $_flags $_cflags
3130 set_ccvars HOSTCC
3131
3132 test -n "$cc_type" && enable $cc_type ||
3133     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3134
3135 : ${as_default:=$cc}
3136 : ${dep_cc_default:=$cc}
3137 : ${ld_default:=$cc}
3138 : ${host_ld_default:=$host_cc}
3139 set_default ar as dep_cc ld host_ld
3140
3141 probe_cc as "$as"
3142 asflags_filter=$_flags_filter
3143 add_asflags $_flags $_cflags
3144 set_ccvars AS
3145
3146 probe_cc ld "$ld"
3147 ldflags_filter=$_flags_filter
3148 add_ldflags $_flags $_ldflags
3149 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3150 LD_O=${_ld_o-$LD_O}
3151 LD_LIB=${_ld_lib-$LD_LIB}
3152 LD_PATH=${_ld_path-$LD_PATH}
3153
3154 probe_cc hostld "$host_ld"
3155 host_ldflags_filter=$_flags_filter
3156 add_host_ldflags $_flags $_ldflags
3157 HOSTLD_O=${_ld_o-$HOSTLD_O}
3158
3159 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3160     probe_cc depcc "$dep_cc"
3161     CCDEP=${_DEPCMD:-$DEPCMD}
3162     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3163     DEPCCFLAGS=$_flags
3164 fi
3165
3166 if $ar 2>&1 | grep -q Microsoft; then
3167     arflags="-nologo"
3168     ar_o='-out:$@'
3169 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3170     arflags="rq"
3171     ar_o='$@'
3172 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3173     arflags='-Xany -r -c'
3174     ar_o='$@'
3175 else
3176     arflags="rc"
3177     ar_o='$@'
3178 fi
3179
3180 add_cflags $extra_cflags
3181 add_asflags $extra_cflags
3182
3183 if test -n "$sysroot"; then
3184     case "$cc_type" in
3185         gcc|llvm_gcc|clang)
3186             add_cppflags --sysroot="$sysroot"
3187             add_ldflags --sysroot="$sysroot"
3188         ;;
3189         tms470)
3190             add_cppflags -I"$sysinclude"
3191             add_ldflags  --sysroot="$sysroot"
3192         ;;
3193     esac
3194 fi
3195
3196 if test "$cpu" = host; then
3197     enabled cross_compile &&
3198         die "--cpu=host makes no sense when cross-compiling."
3199
3200     case "$cc_type" in
3201         gcc|llvm_gcc)
3202             check_native(){
3203                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3204                 sed -n "/cc1.*$1=/{
3205                             s/.*$1=\\([^ ]*\\).*/\\1/
3206                             p
3207                             q
3208                         }" $TMPE
3209             }
3210             cpu=$(check_native -march || check_native -mcpu)
3211         ;;
3212     esac
3213
3214     test "${cpu:-host}" = host &&
3215         die "--cpu=host not supported with compiler $cc"
3216 fi
3217
3218 # Deal with common $arch aliases
3219 case "$arch" in
3220     aarch64|arm64)
3221         arch="aarch64"
3222     ;;
3223     arm*)
3224         arch="arm"
3225     ;;
3226     mips*|IP*)
3227         arch="mips"
3228     ;;
3229     parisc*|hppa*)
3230         arch="parisc"
3231     ;;
3232     "Power Macintosh"|ppc*|powerpc*)
3233         arch="ppc"
3234     ;;
3235     s390|s390x)
3236         arch="s390"
3237     ;;
3238     sh4|sh)
3239         arch="sh4"
3240     ;;
3241     sun4u|sparc*)
3242         arch="sparc"
3243     ;;
3244     tilegx|tile-gx)
3245         arch="tilegx"
3246     ;;
3247     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3248         arch="x86"
3249     ;;
3250 esac
3251
3252 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3253 enable $arch
3254
3255 # Add processor-specific flags
3256 if enabled aarch64; then
3257
3258     case $cpu in
3259         armv*)
3260             cpuflags="-march=$cpu"
3261         ;;
3262         *)
3263             cpuflags="-mcpu=$cpu"
3264         ;;
3265     esac
3266
3267 elif enabled alpha; then
3268
3269     cpuflags="-mcpu=$cpu"
3270
3271 elif enabled arm; then
3272
3273     check_arm_arch() {
3274         check_cpp_condition stddef.h \
3275             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3276             $cpuflags
3277     }
3278
3279     probe_arm_arch() {
3280         if   check_arm_arch 4;        then echo armv4;
3281         elif check_arm_arch 4T;       then echo armv4t;
3282         elif check_arm_arch 5;        then echo armv5;
3283         elif check_arm_arch 5E;       then echo armv5e;
3284         elif check_arm_arch 5T;       then echo armv5t;
3285         elif check_arm_arch 5TE;      then echo armv5te;
3286         elif check_arm_arch 5TEJ;     then echo armv5te;
3287         elif check_arm_arch 6;        then echo armv6;
3288         elif check_arm_arch 6J;       then echo armv6j;
3289         elif check_arm_arch 6K;       then echo armv6k;
3290         elif check_arm_arch 6Z;       then echo armv6z;
3291         elif check_arm_arch 6ZK;      then echo armv6zk;
3292         elif check_arm_arch 6T2;      then echo armv6t2;
3293         elif check_arm_arch 7;        then echo armv7;
3294         elif check_arm_arch 7A  7_A;  then echo armv7-a;
3295         elif check_arm_arch 7S;       then echo armv7-a;
3296         elif check_arm_arch 7R  7_R;  then echo armv7-r;
3297         elif check_arm_arch 7M  7_M;  then echo armv7-m;
3298         elif check_arm_arch 7EM 7E_M; then echo armv7-m;
3299         elif check_arm_arch 8A  8_A;  then echo armv8-a;
3300         fi
3301     }
3302
3303     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3304
3305     case $cpu in
3306         armv*)
3307             cpuflags="-march=$cpu"
3308             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3309         ;;
3310         *)
3311             cpuflags="-mcpu=$cpu"
3312             case $cpu in
3313                 cortex-a*)                               subarch=armv7a  ;;
3314                 cortex-r*)                               subarch=armv7r  ;;
3315                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3316                 arm11*)                                  subarch=armv6   ;;
3317                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3318                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3319                 *)                             subarch=$(probe_arm_arch) ;;
3320             esac
3321         ;;
3322     esac
3323
3324     case "$subarch" in
3325         armv5t*)    enable fast_clz                ;;
3326         armv[6-8]*) enable fast_clz fast_unaligned ;;
3327     esac
3328
3329 elif enabled avr32; then
3330
3331     case $cpu in
3332         ap7[02]0[0-2])
3333             subarch="avr32_ap"
3334             cpuflags="-mpart=$cpu"
3335         ;;
3336         ap)
3337             subarch="avr32_ap"
3338             cpuflags="-march=$cpu"
3339         ;;
3340         uc3[ab]*)
3341             subarch="avr32_uc"
3342             cpuflags="-mcpu=$cpu"
3343         ;;
3344         uc)
3345             subarch="avr32_uc"
3346             cpuflags="-march=$cpu"
3347         ;;
3348     esac
3349
3350 elif enabled bfin; then
3351
3352     cpuflags="-mcpu=$cpu"
3353
3354 elif enabled mips; then
3355
3356     cpuflags="-march=$cpu"
3357
3358 elif enabled ppc; then
3359
3360     disable ldbrx
3361
3362     case $(tolower $cpu) in
3363         601|ppc601|powerpc601)
3364             cpuflags="-mcpu=601"
3365             disable altivec
3366         ;;
3367         603*|ppc603*|powerpc603*)
3368             cpuflags="-mcpu=603"
3369             disable altivec
3370         ;;
3371         604*|ppc604*|powerpc604*)
3372             cpuflags="-mcpu=604"
3373             disable altivec
3374         ;;
3375         g3|75*|ppc75*|powerpc75*)
3376             cpuflags="-mcpu=750"
3377             disable altivec
3378         ;;
3379         g4|745*|ppc745*|powerpc745*)
3380             cpuflags="-mcpu=7450"
3381             disable vsx
3382         ;;
3383         74*|ppc74*|powerpc74*)
3384             cpuflags="-mcpu=7400"
3385             disable vsx
3386         ;;
3387         g5|970|ppc970|powerpc970)
3388             cpuflags="-mcpu=970"
3389             disable vsx
3390         ;;
3391         power[3-6]*)
3392             cpuflags="-mcpu=$cpu"
3393             disable vsx
3394         ;;
3395         power[7-8]*)
3396             cpuflags="-mcpu=$cpu"
3397             enable ldbrx
3398         ;;
3399         cell)
3400             cpuflags="-mcpu=cell"
3401             enable ldbrx
3402             disable vsx
3403         ;;
3404         e500mc)
3405             cpuflags="-mcpu=e500mc"
3406             disable altivec
3407         ;;
3408         e500v2)
3409             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3410             disable altivec
3411             disable dcbzl
3412         ;;
3413         e500)
3414             cpuflags="-mcpu=8540 -mhard-float"
3415             disable altivec
3416             disable dcbzl
3417         ;;
3418     esac
3419
3420 elif enabled sparc; then
3421
3422     case $cpu in
3423         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3424             cpuflags="-mcpu=$cpu"
3425         ;;
3426         ultrasparc*|niagara[234])
3427             cpuflags="-mcpu=$cpu"
3428         ;;
3429     esac
3430
3431 elif enabled x86; then
3432
3433     case $cpu in
3434         i[345]86|pentium)
3435             cpuflags="-march=$cpu"
3436             disable i686
3437             disable mmx
3438         ;;
3439         # targets that do NOT support nopl and conditional mov (cmov)
3440         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3441             cpuflags="-march=$cpu"
3442             disable i686
3443         ;;
3444         # targets that do support nopl and conditional mov (cmov)
3445         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3446             cpuflags="-march=$cpu"
3447             enable i686
3448             enable fast_cmov
3449         ;;
3450         # targets that do support conditional mov but on which it's slow
3451         pentium4|pentium4m|prescott|nocona)
3452             cpuflags="-march=$cpu"
3453             enable i686
3454             disable fast_cmov
3455         ;;
3456     esac
3457
3458 fi
3459
3460 if [ "$cpu" != generic ]; then
3461     add_cflags  $cpuflags
3462     add_asflags $cpuflags
3463 fi
3464
3465 # compiler sanity check
3466 check_exec <<EOF
3467 int main(void){ return 0; }
3468 EOF
3469 if test "$?" != 0; then
3470     echo "$cc is unable to create an executable file."
3471     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3472         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3473         echo "Only do this if you know what cross compiling means."
3474     fi
3475     die "C compiler test failed."
3476 fi
3477
3478 add_cppflags -D_ISOC99_SOURCE
3479 check_cflags -std=c99
3480 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3481 #include <stdlib.h>
3482 EOF
3483 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3484 #include <stdlib.h>
3485 EOF
3486
3487 add_host_cppflags -D_ISOC99_SOURCE
3488 check_host_cflags -std=c99
3489 check_host_cflags -Wall
3490 check_host_cflags -O3
3491
3492 check_64bit(){
3493     arch32=$1
3494     arch64=$2
3495     expr=$3
3496     check_code cc "" "int test[2*($expr) - 1]" &&
3497         subarch=$arch64 || subarch=$arch32
3498 }
3499
3500 case "$arch" in
3501     aarch64|alpha|ia64)
3502         spic=$shared
3503     ;;
3504     mips)
3505         check_64bit mips mips64 '_MIPS_SIM > 1'
3506         spic=$shared
3507     ;;
3508     parisc)
3509         check_64bit parisc parisc64 'sizeof(void *) > 4'
3510         spic=$shared
3511     ;;
3512     ppc)
3513         check_64bit ppc ppc64 'sizeof(void *) > 4'
3514         spic=$shared
3515     ;;
3516     s390)
3517         check_64bit s390 s390x 'sizeof(void *) > 4'
3518         spic=$shared
3519     ;;
3520     sparc)
3521         check_64bit sparc sparc64 'sizeof(void *) > 4'
3522         spic=$shared
3523     ;;
3524     x86)
3525         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3526         if test "$subarch" = "x86_64"; then
3527             spic=$shared
3528         fi
3529     ;;
3530 esac
3531
3532 enable $subarch
3533 enabled spic && enable_weak pic
3534
3535 # OS specific
3536 case $target_os in
3537     aix)
3538         SHFLAGS=-shared
3539         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3540         enabled shared && add_ldflags -Wl,-brtl
3541         ;;
3542     android)
3543         disable symver
3544         enable section_data_rel_ro
3545         SLIB_INSTALL_NAME='$(SLIBNAME)'
3546         SLIB_INSTALL_LINKS=
3547         # soname not set on purpose
3548         SHFLAGS=-shared
3549         ;;
3550     haiku)
3551         prefix_default="/boot/common"
3552         network_extralibs="-lnetwork"
3553         host_libs=
3554         ;;
3555     sunos)
3556         SHFLAGS='-shared -Wl,-h,$$(@F)'
3557         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3558         network_extralibs="-lsocket -lnsl"
3559         # When using suncc to build, the Solaris linker will mark
3560         # an executable with each instruction set encountered by
3561         # the Solaris assembler.  As our libraries contain their own
3562         # guards for processor-specific code, instead suppress
3563         # generation of the HWCAPS ELF section on Solaris x86 only.
3564         enabled_all suncc x86 &&
3565             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3566             add_ldflags -Wl,-M,mapfile
3567         nm_default='nm -P -g'
3568         ;;
3569     netbsd)
3570         disable symver
3571         oss_indev_extralibs="-lossaudio"
3572         oss_outdev_extralibs="-lossaudio"
3573         ;;
3574     openbsd|bitrig)
3575         disable symver
3576         SHFLAGS='-shared'
3577         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3578         SLIB_INSTALL_LINKS=
3579         oss_indev_extralibs="-lossaudio"
3580         oss_outdev_extralibs="-lossaudio"
3581         ;;
3582     dragonfly)
3583         disable symver
3584         ;;
3585     freebsd)
3586         ;;
3587     bsd/os)
3588         add_extralibs -lpoll -lgnugetopt
3589         ;;
3590     darwin)
3591         enabled ppc && add_asflags -force_cpusubtype_ALL
3592         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3593         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3594         add_ldflags -Wl,-dynamic,-search_paths_first
3595         SLIBSUF=".dylib"
3596         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3597         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3598         objformat="macho"
3599         enabled x86_64 && objformat="macho64"
3600         enabled_any pic shared ||
3601             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3602         ;;
3603     mingw32*)
3604         if test $target_os = "mingw32ce"; then
3605             disable network
3606         else
3607             target_os=mingw32
3608         fi
3609         LIBTARGET=i386
3610         if enabled x86_64; then
3611             LIBTARGET="i386:x86-64"
3612         elif enabled arm; then
3613             LIBTARGET=arm-wince
3614         fi
3615         check_ldflags -Wl,--nxcompat
3616         check_ldflags -Wl,--dynamicbase
3617         shlibdir_default="$bindir_default"
3618         SLIBPREF=""
3619         SLIBSUF=".dll"
3620         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3621         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3622         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3623         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3624         SLIB_INSTALL_LINKS=
3625         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3626         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3627         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3628         objformat="win32"
3629         dlltool="${cross_prefix}dlltool"
3630         ranlib=:
3631         enable dos_paths
3632         ;;
3633     win32|win64)
3634         disable symver
3635         if enabled shared; then
3636             # Link to the import library instead of the normal static library
3637             # for shared libs.
3638             LD_LIB='%.lib'
3639             # Cannot build both shared and static libs with MSVC or icl.
3640             disable static
3641         fi
3642         shlibdir_default="$bindir_default"
3643         SLIBPREF=""
3644         SLIBSUF=".dll"
3645         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3646         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3647         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3648         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3649         SLIB_INSTALL_LINKS=
3650         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3651         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3652         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3653         objformat="win32"
3654         ranlib=:
3655         enable dos_paths
3656         ;;
3657     cygwin*)
3658         target_os=cygwin
3659         shlibdir_default="$bindir_default"
3660         SLIBPREF="cyg"
3661         SLIBSUF=".dll"
3662         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3663         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3664         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3665         SLIB_INSTALL_LINKS=
3666         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3667         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3668         objformat="win32"
3669         enable dos_paths
3670         ;;
3671     *-dos|freedos|opendos)
3672         network_extralibs="-lsocket"
3673         objformat="coff"
3674         enable dos_paths
3675         add_cppflags -U__STRICT_ANSI__
3676         ;;
3677     linux)
3678         enable dv1394
3679         enable section_data_rel_ro
3680         ;;
3681     irix*)
3682         target_os=irix
3683         ranlib="echo ignoring ranlib"
3684         ;;
3685     os/2*)
3686         ln_s="cp -f"
3687         objformat="aout"
3688         add_cppflags -D_GNU_SOURCE
3689         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3690         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3691         LIBSUF="_s.a"
3692         SLIBPREF=""
3693         SLIBSUF=".dll"
3694         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3695         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3696         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3697             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3698             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3699             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3700             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3701         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3702             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3703         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3704         enable dos_paths
3705         ;;
3706     gnu/kfreebsd)
3707         add_cppflags -D_BSD_SOURCE
3708         ;;
3709     gnu)
3710         ;;
3711     qnx)
3712         add_cppflags -D_QNX_SOURCE
3713         network_extralibs="-lsocket"
3714         ;;
3715     symbian)
3716         SLIBSUF=".dll"
3717         enable dos_paths
3718         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3719         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3720         add_ldflags -Wl,--target1-abs,--no-undefined \
3721                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3722                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3723         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3724                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3725                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3726         ;;
3727     osf1)
3728         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3729         ;;
3730     minix)
3731         ;;
3732     plan9)
3733         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3734                      -D_REENTRANT_SOURCE        \
3735                      -D_RESEARCH_SOURCE         \
3736                      -DFD_SETSIZE=96            \
3737                      -DHAVE_SOCK_OPTS
3738         add_compat strtod.o strtod=avpriv_strtod
3739         network_extralibs='-lbsd'
3740         exeobjs=compat/plan9/main.o
3741         cp_f='cp'
3742         ;;
3743     none)
3744         ;;
3745     *)
3746         die "Unknown OS '$target_os'."
3747         ;;
3748 esac
3749
3750 # determine libc flavour
3751
3752 probe_libc(){
3753     pfx=$1
3754     pfx_no_=${pfx%_}
3755     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3756     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3757         eval ${pfx}libc_type=uclibc
3758         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3759     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3760         eval ${pfx}libc_type=glibc
3761         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3762     # MinGW headers can be installed on Cygwin, so check for newlib first.
3763     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3764         eval ${pfx}libc_type=newlib
3765         add_${pfx}cppflags -U__STRICT_ANSI__
3766     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3767     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3768         eval ${pfx}libc_type=mingw64
3769         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3770         eval test \$${pfx_no_}cc_type = "gcc" &&
3771             add_${pfx}cppflags -D__printf__=__gnu_printf__
3772     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3773          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3774         eval ${pfx}libc_type=mingw32
3775         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3776             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3777             die "ERROR: MinGW32 runtime version must be >= 3.15."
3778         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3779         eval test \$${pfx_no_}cc_type = "gcc" &&
3780             add_${pfx}cppflags -D__printf__=__gnu_printf__
3781     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3782         eval ${pfx}libc_type=msvcrt
3783         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3784             if [ "$pfx" = host_ ]; then
3785                 add_host_cppflags -Dsnprintf=_snprintf
3786             else
3787                 add_compat strtod.o strtod=avpriv_strtod
3788                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3789                                              _snprintf=avpriv_snprintf  \
3790                                              vsnprintf=avpriv_vsnprintf
3791             fi
3792         fi
3793         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3794         # 0x601 by default unless something else is set by the user.
3795         # This can easily lead to us detecting functions only present
3796         # in such new versions and producing binaries requiring windows 7.0.
3797         # Therefore explicitly set the default to XP unless the user has
3798         # set something else on the command line.
3799         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3800         # family. For these cases, configure is free to use any functions
3801         # found in the SDK headers by default. (Alternatively, we could force
3802         # _WIN32_WINNT to 0x0602 in that case.)
3803         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3804             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3805 #ifdef WINAPI_FAMILY
3806 #include <winapifamily.h>
3807 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
3808 #error not desktop
3809 #endif
3810 #endif
3811 EOF
3812     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
3813         eval ${pfx}libc_type=klibc
3814     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
3815         eval ${pfx}libc_type=bionic
3816     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
3817         eval ${pfx}libc_type=solaris
3818         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
3819     else
3820         eval ${pfx}libc_type=default
3821         add_${pfx}cppflags -D_DEFAULT_SOURCE
3822     fi
3823 }
3824
3825 probe_libc
3826 test -n "$libc_type" && enable libc_$libc_type
3827 probe_libc host_
3828 test -n "$host_libc_type" && enable host_libc_$host_libc_type
3829
3830 case $libc_type in
3831     bionic)
3832         add_compat strtod.o strtod=avpriv_strtod
3833         ;;
3834 esac
3835
3836 # hacks for compiler/libc/os combinations
3837
3838 if enabled_all tms470 libc_glibc; then
3839     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
3840     add_cppflags -D__USER_LABEL_PREFIX__=
3841     add_cppflags -D__builtin_memset=memset
3842     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
3843     add_cflags   -pds=48    # incompatible redefinition of macro
3844 fi
3845
3846 if enabled_all ccc libc_glibc; then
3847     add_ldflags -Wl,-z,now  # calls to libots crash without this
3848 fi
3849
3850 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
3851     add_cppflags '-I\$(SRC_PATH)/compat/float'
3852
3853 esc(){
3854     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
3855 }
3856
3857 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
3858
3859 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
3860
3861 set_default $PATHS_LIST
3862 set_default nm
3863
3864 # we need to build at least one lib type
3865 if ! enabled_any static shared; then
3866     cat <<EOF
3867 At least one library type must be built.
3868 Specify --enable-static to build the static libraries or --enable-shared to
3869 build the shared libraries as well. To only build the shared libraries specify
3870 --disable-static in addition to --enable-shared.
3871 EOF
3872     exit 1;
3873 fi
3874
3875 die_license_disabled() {
3876     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
3877 }
3878
3879 die_license_disabled gpl libcdio
3880 die_license_disabled gpl libx264
3881 die_license_disabled gpl libx265
3882 die_license_disabled gpl libxavs
3883 die_license_disabled gpl libxvid
3884 die_license_disabled gpl x11grab
3885
3886 die_license_disabled nonfree libfaac
3887 die_license_disabled nonfree libfdk_aac
3888 die_license_disabled nonfree nvenc
3889 die_license_disabled nonfree openssl
3890
3891 die_license_disabled version3 libopencore_amrnb
3892 die_license_disabled version3 libopencore_amrwb
3893 die_license_disabled version3 libvo_aacenc
3894 die_license_disabled version3 libvo_amrwbenc
3895
3896 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
3897
3898 disabled optimizations || check_cflags -fomit-frame-pointer
3899
3900 enable_weak_pic() {
3901     disabled pic && return
3902     enable pic
3903     add_cppflags -DPIC
3904     case "$target_os" in
3905     mingw*|cygwin*)
3906         ;;
3907     *)
3908         add_cflags -fPIC
3909         ;;
3910     esac
3911     add_asflags  -fPIC
3912 }
3913
3914 enabled pic && enable_weak_pic
3915
3916 check_cc <<EOF || die "Symbol mangling check failed."
3917 int ff_extern;
3918 EOF
3919 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
3920 extern_prefix=${sym%%ff_extern*}
3921
3922 check_cc <<EOF && enable_weak inline_asm
3923 void foo(void) { __asm__ volatile ("" ::); }
3924 EOF
3925
3926 _restrict=
3927 for restrict_keyword in restrict __restrict__ __restrict; do
3928     check_cc <<EOF && _restrict=$restrict_keyword && break
3929 void foo(char * $restrict_keyword p);
3930 EOF
3931 done
3932
3933 check_cc <<EOF && enable pragma_deprecated
3934 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
3935 EOF
3936
3937 check_cc <<EOF && enable attribute_packed
3938 struct { int x; } __attribute__((packed)) x;
3939 EOF
3940
3941 check_cc <<EOF && enable attribute_may_alias
3942 union { int x; } __attribute__((may_alias)) x;
3943 EOF
3944
3945 check_cc <<EOF || die "endian test failed"
3946 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
3947 EOF
3948 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
3949
3950 check_gas() {
3951     log "check_gas using '$as' as AS"
3952     # :vararg is used on aarch64, arm and ppc altivec
3953     check_as <<EOF || return 1
3954 .macro m n, y:vararg=0
3955 \n: .int \y
3956 .endm
3957 m x
3958 EOF
3959     # .altmacro is only used in arm asm
3960     ! enabled arm || check_as <<EOF || return 1
3961 .altmacro
3962 EOF
3963     enable gnu_as
3964     return 0
3965 }
3966
3967 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
3968     nogas=:
3969     enabled_any arm aarch64 && nogas=die
3970     enabled_all ppc altivec && nogas=warn
3971     as_noop=-v
3972
3973     case $as_type in
3974         arm*) gaspp_as_type=armasm; as_noop=-h ;;
3975         gcc)  gaspp_as_type=gas ;;
3976         *)    gaspp_as_type=$as_type ;;
3977     esac
3978
3979     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
3980
3981     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
3982         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
3983
3984     if ! check_gas ; then
3985         as=${gas:=$as}
3986         check_gas || \
3987             $nogas "GNU assembler not found, install/update gas-preprocessor"
3988     fi
3989
3990     check_as <<EOF && enable as_func
3991 .func test
3992 .endfunc
3993 EOF
3994 fi
3995
3996 check_inline_asm inline_asm_labels '"1:\n"'
3997
3998 if enabled aarch64; then
3999     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4000     # internal assembler in clang 3.3 does not support this instruction
4001     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4002     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4003
4004     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4005
4006 elif enabled alpha; then
4007
4008     check_cflags -mieee
4009
4010 elif enabled arm; then
4011
4012     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4013     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4014     enabled thumb && check_cflags -mthumb || check_cflags -marm
4015
4016     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4017         enable vfp_args
4018     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4019         enable vfp_args
4020     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4021         case "${cross_prefix:-$cc}" in
4022             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4023             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4024 __asm__ (".eabi_attribute 28, 1");
4025 int main(void) { return 0; }
4026 EOF
4027         esac
4028         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4029     fi
4030
4031     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4032     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4033     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4034     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4035     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4036     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4037
4038     [ $target_os = linux ] || [ $target_os = android ] ||
4039         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4040             $ARCH_EXT_LIST_ARM
4041
4042     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4043
4044     check_as <<EOF && enable as_dn_directive
4045 ra .dn d0.i16
4046 .unreq ra
4047 EOF
4048
4049     # llvm's integrated assembler supports .object_arch from llvm 3.5
4050     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4051 .object_arch armv4
4052 EOF
4053
4054     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4055
4056 elif enabled mips; then
4057
4058     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4059
4060 elif enabled parisc; then
4061