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