configure: Silence lld-link when getting the version number
[libav.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-pod2man        do not build manual pages
117   --disable-texi2html      do not build HTML documentation
118   --disable-avdevice       disable libavdevice build
119   --disable-avcodec        disable libavcodec build
120   --disable-avformat       disable libavformat build
121   --disable-avutil         disable libavutil build
122   --disable-swscale        disable libswscale build
123   --disable-avfilter       disable video filter support [no]
124   --disable-avresample     disable libavresample build [no]
125   --disable-pthreads       disable pthreads [auto]
126   --disable-w32threads     disable Win32 threads [auto]
127   --disable-network        disable network support [no]
128   --disable-dct            disable DCT code
129   --disable-error-resilience disable error resilience code
130   --disable-lsp            disable LSP code
131   --disable-lzo            disable LZO decoder code
132   --disable-mdct           disable MDCT code
133   --disable-rdft           disable RDFT code
134   --disable-fft            disable FFT code
135   --disable-faan           disable floating point AAN (I)DCT code
136
137 Individual component options:
138   --disable-everything     disable all components listed below
139   --disable-encoder=NAME   disable encoder NAME
140   --enable-encoder=NAME    enable encoder NAME
141   --disable-encoders       disable all encoders
142   --disable-decoder=NAME   disable decoder NAME
143   --enable-decoder=NAME    enable decoder NAME
144   --disable-decoders       disable all decoders
145   --disable-hwaccel=NAME   disable hwaccel NAME
146   --enable-hwaccel=NAME    enable hwaccel NAME
147   --disable-hwaccels       disable all hwaccels
148   --disable-muxer=NAME     disable muxer NAME
149   --enable-muxer=NAME      enable muxer NAME
150   --disable-muxers         disable all muxers
151   --disable-demuxer=NAME   disable demuxer NAME
152   --enable-demuxer=NAME    enable demuxer NAME
153   --disable-demuxers       disable all demuxers
154   --enable-parser=NAME     enable parser NAME
155   --disable-parser=NAME    disable parser NAME
156   --disable-parsers        disable all parsers
157   --enable-bsf=NAME        enable bitstream filter NAME
158   --disable-bsf=NAME       disable bitstream filter NAME
159   --disable-bsfs           disable all bitstream filters
160   --enable-protocol=NAME   enable protocol NAME
161   --disable-protocol=NAME  disable protocol NAME
162   --disable-protocols      disable all protocols
163   --enable-indev=NAME      enable input device NAME
164   --disable-indev=NAME     disable input device NAME
165   --disable-indevs         disable input devices
166   --enable-outdev=NAME     enable output device NAME
167   --disable-outdev=NAME    disable output device NAME
168   --disable-outdevs        disable output devices
169   --disable-devices        disable all devices
170   --enable-filter=NAME     enable filter NAME
171   --disable-filter=NAME    disable filter NAME
172   --disable-filters        disable all filters
173
174 External library support:
175
176   Using any of the following switches will allow Libav to link to the
177   corresponding external library. All the components depending on that library
178   will become enabled, if all their other dependencies are met and they are not
179   explicitly disabled. E.g. --enable-libwavpack will enable linking to
180   libwavpack and allow the libwavpack encoder to be built, unless it is
181   specifically disabled with --disable-encoder=libwavpack.
182
183   Note that only the system libraries are auto-detected. All the other external
184   libraries must be explicitly enabled.
185
186   Also note that the following help text describes the purpose of the libraries
187   themselves, not all their features will necessarily be usable by Libav.
188
189   --enable-avisynth          video frameserver
190   --enable-bzlib             bzip2 compression [autodetect]
191   --enable-frei0r            video filtering plugins
192   --enable-gnutls            crypto
193   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
194   --enable-libcdio           audio CD input
195   --enable-libdc1394         IEEE 1394/Firewire camera input
196   --enable-libdcadec         DCA audio decoding
197   --enable-libfaac           AAC audio encoding
198   --enable-libfdk-aac        AAC audio encoding/decoding
199   --enable-libfontconfig     font configuration and management
200   --enable-libfreetype       font rendering
201   --enable-libgsm            GSM audio encoding/decoding
202   --enable-libhdcd           HDCD decoding filter
203   --enable-libilbc           ILBC audio encoding/decoding
204   --enable-libkvazaar        HEVC video encoding
205   --enable-libmp3lame        MP3 audio encoding
206   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
207   --enable-libopencore-amrwb AMR-WB audio decoding
208   --enable-libopencv         computer vision
209   --enable-libopenh264       H.264 video encoding/decoding
210   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
211   --enable-libopus           Opus audio encoding/decoding
212   --enable-libpulse          Pulseaudio sound server
213   --enable-librtmp           RTMP streaming
214   --enable-libschroedinger   Dirac video encoding/decoding
215   --enable-libsnappy         snappy compression
216   --enable-libspeex          Speex audio encoding/decoding
217   --enable-libtheora         Theora video encoding/decoding
218   --enable-libtwolame        MP2 audio encoding
219   --enable-libvo-aacenc      AAC audio encoding
220   --enable-libvo-amrwbenc    AMR-WB audio encoding
221   --enable-libvorbis         Vorbis audio encoding/decoding
222   --enable-libvpx            VP* video encoding/decoding
223   --enable-libwavpack        Wavpack audio encoding/decoding
224   --enable-libwebp           WebP image encoding/decoding
225   --enable-libx264           H.264 video encoding
226   --enable-libx265           HEVC video encoding
227   --enable-libxavs           Chinese AVS video encoding
228   --enable-libxcb            X window system protocol communication
229   --enable-libxcb-shm        X11 shm communication [auto]
230   --enable-libxcb-xfixes     X11 mouse rendering [auto]
231   --enable-libxvid           MPEG-4 ASP video encoding
232   --enable-openssl           crypto
233   --enable-zlib              compression [autodetect]
234
235   The following libraries provide various hardware acceleration features:
236   --enable-cuda    Nvidia CUDA (dynamically linked)
237   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
238   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
239   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
240   --enable-libnpp  Nvidia CUDA processing
241   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
242   --enable-nvenc   Nvidia video encoding
243   --enable-omx     OpenMAX IL
244   --enable-omx-rpi OpenMAX IL for Raspberry Pi
245   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
246   --enable-vda     Apple Video Decode Acceleration [auto]
247   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
248
249 Toolchain options:
250   --arch=ARCH              select architecture [$arch]
251   --cpu=CPU                select the minimum required CPU (affects
252                            instruction selection, may crash on older CPUs)
253   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
254   --enable-cross-compile   assume a cross-compiler is used
255   --sysroot=PATH           root of cross-build tree
256   --sysinclude=PATH        location of cross-build system headers
257   --target-os=OS           compiler targets OS [$target_os]
258   --target-exec=CMD        command to run executables on target
259   --target-path=DIR        path to view of build directory on target
260   --target-samples=DIR     path to samples directory on target
261   --toolchain=NAME         set tool defaults according to NAME
262   --nm=NM                  use nm tool
263   --ar=AR                  use archive tool AR [$ar_default]
264   --as=AS                  use assembler AS [$as_default]
265   --cc=CC                  use C compiler CC [$cc_default]
266   --objcc=OCC              use ObjC compiler OCC [$cc_default]
267   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
268   --ld=LD                  use linker LD
269   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
270   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
271   --host-cc=HOSTCC         use host C compiler HOSTCC
272   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
273   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
274   --host-ld=HOSTLD         use host linker HOSTLD
275   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
276   --host-libs=HLIBS        use libs HLIBS when linking for host
277   --host-os=OS             compiler host OS [$target_os]
278   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
279   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
280   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
281   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
282   --extra-libs=ELIBS       add ELIBS [$ELIBS]
283   --extra-version=STRING   version string suffix []
284   --optflags=OPTFLAGS      override optimization-related compiler flags
285   --build-suffix=SUFFIX    library name suffix []
286   --enable-pic             build position-independent code
287   --enable-thumb           compile for Thumb instruction set
288   --enable-lto             use link-time optimization
289   --env="ENV=override"     override the environment variables
290
291 Advanced options (experts only):
292   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
293   --custom-allocator=NAME  use a supported custom allocator
294   --disable-symver         disable symbol versioning
295   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
296   --disable-safe-bitstream-reader
297                            disable buffer boundary checking in bitreaders
298                            (faster, but may crash)
299   --enable-sram            allow use of on-chip SRAM
300
301 Optimization options (experts only):
302   --disable-asm            disable all assembly optimizations
303   --disable-altivec        disable AltiVec optimizations
304   --disable-vsx            disable VSX optimizations
305   --disable-power8         disable POWER8 optimizations
306   --disable-amd3dnow       disable 3DNow! optimizations
307   --disable-amd3dnowext    disable 3DNow! extended optimizations
308   --disable-mmx            disable MMX optimizations
309   --disable-mmxext         disable MMXEXT optimizations
310   --disable-sse            disable SSE optimizations
311   --disable-sse2           disable SSE2 optimizations
312   --disable-sse3           disable SSE3 optimizations
313   --disable-ssse3          disable SSSE3 optimizations
314   --disable-sse4           disable SSE4 optimizations
315   --disable-sse42          disable SSE4.2 optimizations
316   --disable-avx            disable AVX optimizations
317   --disable-xop            disable XOP optimizations
318   --disable-fma3           disable FMA3 optimizations
319   --disable-fma4           disable FMA4 optimizations
320   --disable-avx2           disable AVX2 optimizations
321   --disable-armv5te        disable armv5te optimizations
322   --disable-armv6          disable armv6 optimizations
323   --disable-armv6t2        disable armv6t2 optimizations
324   --disable-vfp            disable VFP optimizations
325   --disable-neon           disable NEON optimizations
326   --disable-inline-asm     disable use of inline assembly
327   --disable-yasm           disable use of nasm/yasm assembly
328
329 Developer options (useful when working on Libav itself):
330   --disable-debug          disable debugging symbols
331   --enable-debug=LEVEL     set the debug level [$debuglevel]
332   --disable-optimizations  disable compiler optimizations
333   --enable-extra-warnings  enable more compiler warnings
334   --samples=PATH           location of test samples for FATE, if not set use
335                            \$LIBAV_SAMPLES at make invocation time.
336   --enable-neon-clobber-test check NEON registers for clobbering (should be
337                            used only for debugging purposes)
338   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
339                            should be used only for debugging purposes)
340   --enable-random          randomly enable/disable components
341   --disable-random
342   --enable-random=LIST     randomly enable/disable specific components or
343   --disable-random=LIST    component groups. LIST is a comma-separated list
344                            of NAME[:PROB] entries where NAME is a component
345                            (group) and PROB the probability associated with
346                            NAME (default 0.5).
347   --random-seed=VALUE      seed value for --enable/disable-random
348   --disable-valgrind-backtrace do not print a backtrace under Valgrind
349                            (only applies to --disable-optimizations builds)
350
351 NOTE: Object files are built at the place where configure is launched.
352 EOF
353   exit 0
354 }
355
356 quotes='""'
357
358 log(){
359     echo "$@" >> $logfile
360 }
361
362 log_file(){
363     log BEGIN $1
364     i=1
365     while read line; do
366         printf '%5s   %s\n' "${i}" "${line}"
367         i=$(($i+1))
368     done < $1 >> $logfile
369     log END $1
370 }
371
372 echolog(){
373     log "$@"
374     echo "$@"
375 }
376
377 warn(){
378     log "WARNING: $*"
379     WARNINGS="${WARNINGS}WARNING: $*\n"
380 }
381
382 die(){
383     echolog "$@"
384     cat <<EOF
385
386 If you think configure made a mistake, make sure you are using the latest
387 version from Git.  If the latest version fails, report the problem to the
388 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
389 EOF
390     if disabled logging; then
391         cat <<EOF
392 Rerun configure with logging enabled (do not use --disable-logging), and
393 include the log this produces with your report.
394 EOF
395     else
396         cat <<EOF
397 Include the log file "$logfile" produced by configure as this will help
398 solving the problem.
399 EOF
400     fi
401     exit 1
402 }
403
404 # Avoid locale weirdness, besides we really just want to translate ASCII.
405 toupper(){
406     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
407 }
408
409 tolower(){
410     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
411 }
412
413 c_escape(){
414     echo "$*" | sed 's/["\\]/\\\0/g'
415 }
416
417 sh_quote(){
418     v=$(echo "$1" | sed "s/'/'\\\\''/g")
419     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
420     echo "$v"
421 }
422
423 cleanws(){
424     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
425 }
426
427 filter(){
428     pat=$1
429     shift
430     for v; do
431         eval "case $v in $pat) echo $v ;; esac"
432     done
433 }
434
435 filter_out(){
436     pat=$1
437     shift
438     for v; do
439         eval "case $v in $pat) ;; *) echo $v ;; esac"
440     done
441 }
442
443 map(){
444     m=$1
445     shift
446     for v; do eval $m; done
447 }
448
449 add_suffix(){
450     suffix=$1
451     shift
452     for v; do echo ${v}${suffix}; done
453 }
454
455 set_all(){
456     value=$1
457     shift
458     for var in $*; do
459         eval $var=$value
460     done
461 }
462
463 set_weak(){
464     value=$1
465     shift
466     for var; do
467         eval : \${$var:=$value}
468     done
469 }
470
471 sanitize_var_name(){
472     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
473 }
474
475 set_safe(){
476     var=$1
477     shift
478     eval $(sanitize_var_name "$var")='$*'
479 }
480
481 get_safe(){
482     eval echo \$$(sanitize_var_name "$1")
483 }
484
485 pushvar(){
486     for pvar in $*; do
487         eval level=\${${pvar}_level:=0}
488         eval ${pvar}_${level}="\$$pvar"
489         eval ${pvar}_level=$(($level+1))
490     done
491 }
492
493 popvar(){
494     for pvar in $*; do
495         eval level=\${${pvar}_level:-0}
496         test $level = 0 && continue
497         eval level=$(($level-1))
498         eval $pvar="\${${pvar}_${level}}"
499         eval ${pvar}_level=$level
500         eval unset ${pvar}_${level}
501     done
502 }
503
504 enable(){
505     set_all yes $*
506 }
507
508 disable(){
509     set_all no $*
510 }
511
512 enable_weak(){
513     set_weak yes $*
514 }
515
516 disable_weak(){
517     set_weak no $*
518 }
519
520 enable_safe(){
521     for var; do
522         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
523     done
524 }
525
526 disable_safe(){
527     for var; do
528         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
529     done
530 }
531
532 do_enable_deep(){
533     for var; do
534         enabled $var && continue
535         eval sel="\$${var}_select"
536         eval sgs="\$${var}_suggest"
537         pushvar var sgs
538         enable_deep $sel
539         popvar sgs
540         enable_deep_weak $sgs
541         popvar var
542     done
543 }
544
545 enable_deep(){
546     do_enable_deep $*
547     enable $*
548 }
549
550 enable_deep_weak(){
551     for var; do
552         disabled $var && continue
553         pushvar var
554         do_enable_deep $var
555         popvar var
556         enable_weak $var
557     done
558 }
559
560 enabled(){
561     test "${1#!}" = "$1" && op== || op=!=
562     eval test "x\$${1#!}" $op "xyes"
563 }
564
565 disabled(){
566     test "${1#!}" = "$1" && op== || op=!=
567     eval test "x\$${1#!}" $op "xno"
568 }
569
570 enabled_all(){
571     for opt; do
572         enabled $opt || return 1
573     done
574 }
575
576 disabled_all(){
577     for opt; do
578         disabled $opt || return 1
579     done
580 }
581
582 enabled_any(){
583     for opt; do
584         enabled $opt && return 0
585     done
586 }
587
588 disabled_any(){
589     for opt; do
590         disabled $opt && return 0
591     done
592     return 1
593 }
594
595 set_default(){
596     for opt; do
597         eval : \${$opt:=\$${opt}_default}
598     done
599 }
600
601 is_in(){
602     value=$1
603     shift
604     for var in $*; do
605         [ $var = $value ] && return 0
606     done
607     return 1
608 }
609
610 do_check_deps(){
611     for cfg; do
612         cfg="${cfg#!}"
613         enabled ${cfg}_checking && die "Circular dependency for $cfg."
614         disabled ${cfg}_checking && continue
615         enable ${cfg}_checking
616         append allopts $cfg
617
618         eval dep_all="\$${cfg}_deps"
619         eval dep_any="\$${cfg}_deps_any"
620         eval dep_sel="\$${cfg}_select"
621         eval dep_sgs="\$${cfg}_suggest"
622         eval dep_ifa="\$${cfg}_if"
623         eval dep_ifn="\$${cfg}_if_any"
624
625         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
626         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
627         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
628
629         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
630         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
631         enabled_all  $dep_all || disable $cfg
632         enabled_any  $dep_any || disable $cfg
633         disabled_any $dep_sel && disable $cfg
634
635         if enabled $cfg; then
636             enable_deep $dep_sel
637             enable_deep_weak $dep_sgs
638         fi
639
640         disable ${cfg}_checking
641     done
642 }
643
644 check_deps(){
645     unset allopts
646
647     do_check_deps "$@"
648
649     for cfg in $allopts; do
650         enabled $cfg || continue
651         eval dep_extralibs="\$${cfg}_extralibs"
652         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
653     done
654 }
655
656 print_config(){
657     pfx=$1
658     files=$2
659     shift 2
660     map 'eval echo "$v \${$v:-no}"' "$@" |
661     awk "BEGIN { split(\"$files\", files) }
662         {
663             c = \"$pfx\" toupper(\$1);
664             v = \$2;
665             sub(/yes/, 1, v);
666             sub(/no/,  0, v);
667             for (f in files) {
668                 file = files[f];
669                 if (file ~ /\\.h\$/) {
670                     printf(\"#define %s %d\\n\", c, v) >>file;
671                 } else if (file ~ /\\.asm\$/) {
672                     printf(\"%%define %s %d\\n\", c, v) >>file;
673                 } else if (file ~ /\\.mak\$/) {
674                     n = -v ? \"\" : \"!\";
675                     printf(\"%s%s=yes\\n\", n, c) >>file;
676                 }
677             }
678         }"
679 }
680
681 print_enabled(){
682     suf=$1
683     shift
684     for v; do
685         enabled $v && printf "%s\n" ${v%$suf}
686     done
687 }
688
689 append(){
690     var=$1
691     shift
692     eval "$var=\"\$$var $*\""
693 }
694
695 prepend(){
696     var=$1
697     shift
698     eval "$var=\"$* \$$var\""
699 }
700
701 unique(){
702     var=$1
703     uniq_list=""
704     for tok in $(eval echo \$$var); do
705         uniq_list="$(filter_out $tok $uniq_list) $tok"
706     done
707     eval "$var=\"${uniq_list}\""
708 }
709
710 add_cppflags(){
711     append CPPFLAGS "$@"
712 }
713
714 add_cflags(){
715     append CFLAGS $($cflags_filter "$@")
716 }
717
718 add_asflags(){
719     append ASFLAGS $($asflags_filter "$@")
720 }
721
722 add_objcflags(){
723     append OBJCFLAGS $($objcflags_filter "$@")
724 }
725
726 add_ldflags(){
727     append LDFLAGS $($ldflags_filter "$@")
728 }
729
730 add_ldexeflags(){
731     append LDEXEFLAGS $($ldflags_filter "$@")
732 }
733
734 add_stripflags(){
735     append STRIPFLAGS "$@"
736 }
737
738 add_extralibs(){
739     prepend extralibs $($ldflags_filter "$@")
740 }
741
742 add_host_cppflags(){
743     append host_cppflags "$@"
744 }
745
746 add_host_cflags(){
747     append host_cflags $($host_cflags_filter "$@")
748 }
749
750 add_host_ldflags(){
751     append host_ldflags $($host_ldflags_filter "$@")
752 }
753
754 add_compat(){
755     append compat_objs $1
756     shift
757     map 'add_cppflags -D$v' "$@"
758 }
759
760 check_cmd(){
761     log "$@"
762     "$@" >> $logfile 2>&1
763 }
764
765 cc_o(){
766     eval printf '%s\\n' $CC_O
767 }
768
769 cc_e(){
770     eval printf '%s\\n' $CC_E
771 }
772
773 check_cc(){
774     log check_cc "$@"
775     cat > $TMPC
776     log_file $TMPC
777     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
778 }
779
780 check_objcc(){
781     log check_objcc "$@"
782     cat > $TMPC
783     log_file $TMPC
784     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
785 }
786
787 check_cpp(){
788     log check_cpp "$@"
789     cat > $TMPC
790     log_file $TMPC
791     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
792 }
793
794 as_o(){
795     eval printf '%s\\n' $AS_O
796 }
797
798 check_as(){
799     log check_as "$@"
800     cat > $TMPS
801     log_file $TMPS
802     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
803 }
804
805 check_inline_asm(){
806     log check_inline_asm "$@"
807     name="$1"
808     code="$2"
809     shift 2
810     disable $name
811     check_cc "$@" <<EOF && enable $name
812 void foo(void){ __asm__ volatile($code); }
813 EOF
814 }
815
816 check_insn(){
817     log check_insn "$@"
818     check_inline_asm ${1}_inline "\"$2\""
819     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
820 }
821
822 check_yasm(){
823     log check_yasm "$@"
824     echo "$1" > $TMPS
825     log_file $TMPS
826     shift 1
827     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
828 }
829
830 ld_o(){
831     eval printf '%s\\n' $LD_O
832 }
833
834 check_ld(){
835     log check_ld "$@"
836     flags=$(filter_out '-l*' "$@")
837     libs=$(filter '-l*' "$@")
838     check_cc $($cflags_filter $flags) || return
839     flags=$($ldflags_filter $flags)
840     libs=$($ldflags_filter $libs)
841     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
842 }
843
844 print_include(){
845     hdr=$1
846     test "${hdr%.h}" = "${hdr}" &&
847         echo "#include $hdr"    ||
848         echo "#include <$hdr>"
849 }
850
851 check_code(){
852     log check_code "$@"
853     check=$1
854     headers=$2
855     code=$3
856     shift 3
857     {
858         for hdr in $headers; do
859             print_include $hdr
860         done
861         echo "int main(void) { $code; return 0; }"
862     } | check_$check "$@"
863 }
864
865 check_cppflags(){
866     log check_cppflags "$@"
867     check_cc "$@" <<EOF && append CPPFLAGS "$@"
868 int x;
869 EOF
870 }
871
872 test_cflags(){
873     log test_cflags "$@"
874     set -- $($cflags_filter "$@")
875     check_cc "$@" <<EOF
876 int x;
877 EOF
878 }
879
880 check_cflags(){
881     log check_cflags "$@"
882     test_cflags "$@" && add_cflags "$@"
883 }
884
885 test_objcflags(){
886     log test_cflags "$@"
887     set -- $($cflags_filter "$@")
888     check_objcc "$@" <<EOF
889 int x;
890 EOF
891 }
892
893 check_objcflags(){
894     log check_cflags "$@"
895     test_objcflags "$@" && add_objcflags "$@"
896 }
897
898 test_ldflags(){
899     log test_ldflags "$@"
900     check_ld "$@" <<EOF
901 int main(void){ return 0; }
902 EOF
903 }
904
905 check_ldflags(){
906     log check_ldflags "$@"
907     test_ldflags "$@" && add_ldflags "$@"
908 }
909
910 test_stripflags(){
911     log test_stripflags "$@"
912     # call check_cc to get a fresh TMPO
913     check_cc <<EOF
914 int main(void) { return 0; }
915 EOF
916     check_cmd $strip $STRIPFLAGS "$@" $TMPO
917 }
918
919 check_stripflags(){
920     log check_stripflags "$@"
921     test_stripflags "$@" && add_stripflags "$@"
922 }
923
924 check_header(){
925     log check_header "$@"
926     header=$1
927     shift
928     disable_safe $header
929     check_cpp "$@" <<EOF && enable_safe $header
930 #include <$header>
931 int x;
932 EOF
933 }
934
935 check_func(){
936     log check_func "$@"
937     func=$1
938     shift
939     disable $func
940     check_ld "$@" <<EOF && enable $func
941 extern int $func();
942 int main(void){ $func(); }
943 EOF
944 }
945
946 check_mathfunc(){
947     log check_mathfunc "$@"
948     func=$1
949     narg=$2
950     shift 2
951     test $narg = 2 && args="f, g" || args="f"
952     disable $func
953     check_ld "$@" <<EOF && enable $func
954 #include <math.h>
955 float foo(float f, float g) { return $func($args); }
956 int main(void){ return 0; }
957 EOF
958 }
959
960 check_func_headers(){
961     log check_func_headers "$@"
962     headers=$1
963     funcs=$2
964     shift 2
965     {
966         for hdr in $headers; do
967             print_include $hdr
968         done
969         for func in $funcs; do
970             echo "long check_$func(void) { return (long) $func; }"
971         done
972         echo "int main(void) { return 0; }"
973     } | check_ld "$@" && enable $funcs && enable_safe $headers
974 }
975
976 check_cpp_condition(){
977     log check_cpp_condition "$@"
978     header=$1
979     condition=$2
980     shift 2
981     check_cpp "$@" <<EOF
982 #include <$header>
983 #if !($condition)
984 #error "unsatisfied condition: $condition"
985 #endif
986 EOF
987 }
988
989 test_cflags_cpp(){
990     log test_cflags_cpp "$@"
991     flags=$1
992     condition=$2
993     shift 2
994     set -- $($cflags_filter "$flags")
995     check_cpp "$@" <<EOF
996 #if !($condition)
997 #error "unsatisfied condition: $condition"
998 #endif
999 EOF
1000 }
1001
1002 check_lib(){
1003     log check_lib "$@"
1004     headers="$1"
1005     funcs="$2"
1006     shift 2
1007     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1008 }
1009
1010 check_pkg_config(){
1011     log check_pkg_config "$@"
1012     pkg="$1"
1013     headers="$2"
1014     funcs="$3"
1015     shift 3
1016     check_cmd $pkg_config --exists --print-errors $pkg || return
1017     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1018     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1019     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1020         set_safe "${pkg}_cflags" $pkg_cflags   &&
1021         set_safe "${pkg}_libs"   $pkg_libs
1022 }
1023
1024 check_exec(){
1025     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1026 }
1027
1028 check_exec_crash(){
1029     code=$(cat)
1030
1031     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1032     # are safe but may not be available everywhere.  Thus we use
1033     # raise(SIGTERM) instead.  The check is run in a subshell so we
1034     # can redirect the "Terminated" message from the shell.  SIGBUS
1035     # is not defined by standard C so it is used conditionally.
1036
1037     (check_exec "$@") >> $logfile 2>&1 <<EOF
1038 #include <signal.h>
1039 static void sighandler(int sig){
1040     raise(SIGTERM);
1041 }
1042 int foo(void){
1043     $code
1044 }
1045 int (*func_ptr)(void) = foo;
1046 int main(void){
1047     signal(SIGILL, sighandler);
1048     signal(SIGFPE, sighandler);
1049     signal(SIGSEGV, sighandler);
1050 #ifdef SIGBUS
1051     signal(SIGBUS, sighandler);
1052 #endif
1053     return func_ptr();
1054 }
1055 EOF
1056 }
1057
1058 check_type(){
1059     log check_type "$@"
1060     headers=$1
1061     type=$2
1062     shift 2
1063     disable_safe "$type"
1064     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1065 }
1066
1067 check_struct(){
1068     log check_struct "$@"
1069     headers=$1
1070     struct=$2
1071     member=$3
1072     shift 3
1073     disable_safe "${struct}_${member}"
1074     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1075         enable_safe "${struct}_${member}"
1076 }
1077
1078 check_builtin(){
1079     log check_builtin "$@"
1080     name=$1
1081     headers=$2
1082     builtin=$3
1083     shift 3
1084     disable "$name"
1085     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1086 }
1087
1088 check_compile_assert(){
1089     log check_compile_assert "$@"
1090     name=$1
1091     headers=$2
1092     condition=$3
1093     shift 3
1094     disable "$name"
1095     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1096 }
1097
1098 require(){
1099     name="$1"
1100     headers="$2"
1101     func="$3"
1102     shift 3
1103     check_lib "$headers" $func "$@" || die "ERROR: $name not found"
1104 }
1105
1106 require_pkg_config(){
1107     pkg="$1"
1108     check_pkg_config "$@" || die "ERROR: $pkg not found"
1109     add_cflags    $(get_safe "${pkg}_cflags")
1110     add_extralibs $(get_safe "${pkg}_libs")
1111 }
1112
1113 hostcc_e(){
1114     eval printf '%s\\n' $HOSTCC_E
1115 }
1116
1117 hostcc_o(){
1118     eval printf '%s\\n' $HOSTCC_O
1119 }
1120
1121 check_host_cc(){
1122     log check_host_cc "$@"
1123     cat > $TMPC
1124     log_file $TMPC
1125     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1126 }
1127
1128 check_host_cpp(){
1129     log check_host_cpp "$@"
1130     cat > $TMPC
1131     log_file $TMPC
1132     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1133 }
1134
1135 check_host_cppflags(){
1136     log check_host_cppflags "$@"
1137     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1138 int x;
1139 EOF
1140 }
1141
1142 check_host_cflags(){
1143     log check_host_cflags "$@"
1144     set -- $($host_cflags_filter "$@")
1145     check_host_cc "$@" <<EOF && append host_cflags "$@"
1146 int x;
1147 EOF
1148 }
1149
1150 check_host_cpp_condition(){
1151     log check_host_cpp_condition "$@"
1152     header=$1
1153     condition=$2
1154     shift 2
1155     check_host_cpp "$@" <<EOF
1156 #include <$header>
1157 #if !($condition)
1158 #error "unsatisfied condition: $condition"
1159 #endif
1160 EOF
1161 }
1162
1163 apply(){
1164     file=$1
1165     shift
1166     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1167 }
1168
1169 cp_if_changed(){
1170     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1171     mkdir -p "$(dirname $2)"
1172     $cp_f "$1" "$2"
1173 }
1174
1175 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1176 # system-dependent things.
1177
1178 AVCODEC_COMPONENTS="
1179     bsfs
1180     decoders
1181     encoders
1182     hwaccels
1183     parsers
1184 "
1185
1186 AVDEVICE_COMPONENTS="
1187     indevs
1188     outdevs
1189 "
1190 AVFILTER_COMPONENTS="
1191     filters
1192 "
1193 AVFORMAT_COMPONENTS="
1194     demuxers
1195     muxers
1196     protocols
1197 "
1198
1199 AVRESAMPLE_COMPONENTS=""
1200 AVUTIL_COMPONENTS=""
1201
1202 COMPONENT_LIST="
1203     $AVCODEC_COMPONENTS
1204     $AVDEVICE_COMPONENTS
1205     $AVFILTER_COMPONENTS
1206     $AVFORMAT_COMPONENTS
1207     $AVRESAMPLE_COMPONENTS
1208     $AVUTIL_COMPONENTS
1209 "
1210
1211 EXAMPLE_LIST="
1212     decode_audio_example
1213     decode_video_example
1214     encode_audio_example
1215     encode_video_example
1216     filter_audio_example
1217     metadata_example
1218     output_example
1219     qsvdec_example
1220     transcode_aac_example
1221 "
1222
1223 HWACCEL_LIBRARY_NONFREE_LIST="
1224     cuda
1225     libnpp
1226 "
1227 HWACCEL_LIBRARY_LIST="
1228     $HWACCEL_LIBRARY_NONFREE_LIST
1229     d3d11va
1230     dxva2
1231     libmfx
1232     mmal
1233     nvenc
1234     omx
1235     vaapi
1236     vda
1237     vdpau
1238 "
1239
1240 EXTERNAL_LIBRARY_GPL_LIST="
1241     libcdio
1242     libx264
1243     libx265
1244     libxavs
1245     libxvid
1246 "
1247
1248 EXTERNAL_LIBRARY_NONFREE_LIST="
1249     libfaac
1250     libfdk_aac
1251     openssl
1252 "
1253
1254 EXTERNAL_LIBRARY_VERSION3_LIST="
1255     libopencore_amrnb
1256     libopencore_amrwb
1257     libvo_aacenc
1258     libvo_amrwbenc
1259 "
1260
1261 EXTERNAL_LIBRARY_LIST="
1262     $EXTERNAL_LIBRARY_GPL_LIST
1263     $EXTERNAL_LIBRARY_NONFREE_LIST
1264     $EXTERNAL_LIBRARY_VERSION3_LIST
1265     avisynth
1266     bzlib
1267     frei0r
1268     gnutls
1269     libbs2b
1270     libdc1394
1271     libdcadec
1272     libfontconfig
1273     libfreetype
1274     libgsm
1275     libhdcd
1276     libilbc
1277     libkvazaar
1278     libmp3lame
1279     libopencv
1280     libopenh264
1281     libopenjpeg
1282     libopus
1283     libpulse
1284     librtmp
1285     libschroedinger
1286     libsnappy
1287     libspeex
1288     libtheora
1289     libtwolame
1290     libvorbis
1291     libvpx
1292     libwavpack
1293     libwebp
1294     libxcb
1295     libxcb_shm
1296     libxcb_xfixes
1297     zlib
1298 "
1299
1300 FEATURE_LIST="
1301     gray
1302     hardcoded_tables
1303     omx_rpi
1304     runtime_cpudetect
1305     safe_bitstream_reader
1306     shared
1307     small
1308     sram
1309     static
1310     swscale_alpha
1311 "
1312
1313 LIBRARY_LIST="
1314     avcodec
1315     avdevice
1316     avfilter
1317     avformat
1318     avresample
1319     avutil
1320     swscale
1321 "
1322
1323 LICENSE_LIST="
1324     gpl
1325     nonfree
1326     version3
1327 "
1328
1329 PROGRAM_LIST="
1330     avconv
1331     avplay
1332     avprobe
1333 "
1334
1335 SUBSYSTEM_LIST="
1336     dct
1337     doc
1338     error_resilience
1339     faan
1340     fft
1341     lsp
1342     lzo
1343     mdct
1344     network
1345     rdft
1346 "
1347
1348 CONFIG_LIST="
1349     $COMPONENT_LIST
1350     $EXAMPLE_LIST
1351     $EXTERNAL_LIBRARY_LIST
1352     $HWACCEL_LIBRARY_LIST
1353     $FEATURE_LIST
1354     $LICENSE_LIST
1355     $LIBRARY_LIST
1356     $PROGRAM_LIST
1357     $SUBSYSTEM_LIST
1358     neon_clobber_test
1359     pic
1360     pod2man
1361     texi2html
1362     thumb
1363     valgrind_backtrace
1364     xmm_clobber_test
1365 "
1366
1367 THREADS_LIST="
1368     pthreads
1369     w32threads
1370 "
1371
1372 ATOMICS_LIST="
1373     atomics_gcc
1374     atomics_suncc
1375     atomics_win32
1376 "
1377
1378 ARCH_LIST="
1379     aarch64
1380     alpha
1381     arm
1382     avr32
1383     avr32_ap
1384     avr32_uc
1385     bfin
1386     ia64
1387     m68k
1388     mips
1389     mips64
1390     parisc
1391     ppc
1392     ppc64
1393     s390
1394     sh4
1395     sparc
1396     sparc64
1397     tilegx
1398     tilepro
1399     tomi
1400     x86
1401     x86_32
1402     x86_64
1403 "
1404
1405 ARCH_EXT_LIST_ARM="
1406     armv5te
1407     armv6
1408     armv6t2
1409     armv8
1410     neon
1411     vfp
1412     vfpv3
1413 "
1414
1415 ARCH_EXT_LIST_X86_SIMD="
1416     amd3dnow
1417     amd3dnowext
1418     avx
1419     avx2
1420     fma3
1421     fma4
1422     mmx
1423     mmxext
1424     sse
1425     sse2
1426     sse3
1427     sse4
1428     sse42
1429     ssse3
1430     xop
1431 "
1432
1433 ARCH_EXT_LIST_PPC="
1434     altivec
1435     dcbzl
1436     ldbrx
1437     power8
1438     ppc4xx
1439     vsx
1440 "
1441
1442 ARCH_EXT_LIST_X86="
1443     $ARCH_EXT_LIST_X86_SIMD
1444     cpunop
1445     i686
1446 "
1447
1448 ARCH_EXT_LIST_MIPS="
1449     loongson
1450     mips32r1
1451     mips64r1
1452     mips32r2
1453     mips64r2
1454     mips32r6
1455     mips64r6
1456 "
1457
1458 ARCH_EXT_LIST="
1459     $ARCH_EXT_LIST_ARM
1460     $ARCH_EXT_LIST_MIPS
1461     $ARCH_EXT_LIST_PPC
1462     $ARCH_EXT_LIST_X86
1463     vis
1464 "
1465
1466 ARCH_FEATURES="
1467     aligned_stack
1468     fast_64bit
1469     fast_clz
1470     fast_cmov
1471     local_aligned_8
1472     local_aligned_16
1473     local_aligned_32
1474     simd_align_16
1475     simd_align_32
1476 "
1477
1478 BUILTIN_LIST="
1479     atomic_cas_ptr
1480     machine_rw_barrier
1481     MemoryBarrier
1482     mm_empty
1483     rdtsc
1484     sem_timedwait
1485     sync_val_compare_and_swap
1486 "
1487 HAVE_LIST_CMDLINE="
1488     inline_asm
1489     symver
1490     yasm
1491 "
1492
1493 HAVE_LIST_PUB="
1494     bigendian
1495     fast_unaligned
1496 "
1497
1498 HEADERS_LIST="
1499     AVFoundation_AVFoundation_h
1500     alsa_asoundlib_h
1501     altivec_h
1502     arpa_inet_h
1503     cdio_paranoia_h
1504     cdio_paranoia_paranoia_h
1505     dispatch_dispatch_h
1506     dev_bktr_ioctl_bt848_h
1507     dev_bktr_ioctl_meteor_h
1508     dev_ic_bt8xx_h
1509     dev_video_bktr_ioctl_bt848_h
1510     dev_video_meteor_ioctl_meteor_h
1511     direct_h
1512     dlfcn_h
1513     d3d11_h
1514     dxva_h
1515     gsm_h
1516     io_h
1517     mach_mach_time_h
1518     machine_ioctl_bt848_h
1519     machine_ioctl_meteor_h
1520     malloc_h
1521     poll_h
1522     sndio_h
1523     soundcard_h
1524     stdatomic_h
1525     sys_mman_h
1526     sys_param_h
1527     sys_resource_h
1528     sys_select_h
1529     sys_soundcard_h
1530     sys_time_h
1531     sys_un_h
1532     sys_videoio_h
1533     unistd_h
1534     valgrind_valgrind_h
1535     windows_h
1536     winsock2_h
1537 "
1538
1539 INTRINSICS_LIST="
1540     intrinsics_neon
1541 "
1542
1543 MATH_FUNCS="
1544     atanf
1545     atan2f
1546     cbrtf
1547     cosf
1548     exp2
1549     exp2f
1550     expf
1551     isinf
1552     isnan
1553     ldexpf
1554     llrint
1555     llrintf
1556     log2
1557     log2f
1558     log10f
1559     lrint
1560     lrintf
1561     powf
1562     rint
1563     round
1564     roundf
1565     sinf
1566     trunc
1567     truncf
1568 "
1569
1570 SYSTEM_FUNCS="
1571     aligned_malloc
1572     clock_gettime
1573     closesocket
1574     CommandLineToArgvW
1575     CoTaskMemFree
1576     CryptGenRandom
1577     dlopen
1578     fcntl
1579     flt_lim
1580     fork
1581     getaddrinfo
1582     gethrtime
1583     getopt
1584     GetProcessAffinityMask
1585     GetProcessMemoryInfo
1586     GetProcessTimes
1587     getrusage
1588     GetSystemTimeAsFileTime
1589     gettimeofday
1590     gmtime_r
1591     inet_aton
1592     isatty
1593     jack_port_get_latency_range
1594     LoadLibrary
1595     localtime_r
1596     mach_absolute_time
1597     MapViewOfFile
1598     memalign
1599     mkstemp
1600     mmap
1601     mprotect
1602     nanosleep
1603     posix_memalign
1604     sched_getaffinity
1605     SetConsoleTextAttribute
1606     setmode
1607     setrlimit
1608     Sleep
1609     strerror_r
1610     sysconf
1611     sysctl
1612     usleep
1613     VirtualAlloc
1614 "
1615
1616 TOOLCHAIN_FEATURES="
1617     as_dn_directive
1618     as_fpu_directive
1619     as_func
1620     as_object_arch
1621     asm_mod_q
1622     attribute_may_alias
1623     attribute_packed
1624     ebp_available
1625     ebx_available
1626     gnu_as
1627     ibm_asm
1628     inline_asm_labels
1629     pragma_deprecated
1630     symver_asm_label
1631     symver_gnu_asm
1632     vfp_args
1633     xform_asm
1634     xmm_clobbers
1635 "
1636
1637 TYPES_LIST="
1638     CONDITION_VARIABLE_Ptr
1639     socklen_t
1640     struct_addrinfo
1641     struct_group_source_req
1642     struct_ip_mreq_source
1643     struct_ipv6_mreq
1644     struct_pollfd
1645     struct_rusage_ru_maxrss
1646     struct_sockaddr_in6
1647     struct_sockaddr_sa_len
1648     struct_sockaddr_storage
1649     struct_v4l2_frmivalenum_discrete
1650 "
1651
1652 HAVE_LIST="
1653     $ARCH_EXT_LIST
1654     $(add_suffix _external $ARCH_EXT_LIST)
1655     $(add_suffix _inline   $ARCH_EXT_LIST)
1656     $ARCH_FEATURES
1657     $BUILTIN_LIST
1658     $HAVE_LIST_CMDLINE
1659     $HAVE_LIST_PUB
1660     $HEADERS_LIST
1661     $INTRINSICS_LIST
1662     $MATH_FUNCS
1663     $SYSTEM_FUNCS
1664     $THREADS_LIST
1665     $TOOLCHAIN_FEATURES
1666     $TYPES_LIST
1667     dos_paths
1668     dxva2_lib
1669     libc_msvcrt
1670     libdc1394_1
1671     libdc1394_2
1672     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1673     sdl
1674     section_data_rel_ro
1675     threads
1676     vaapi_drm
1677     vaapi_x11
1678     vdpau_x11
1679     xlib
1680 "
1681
1682 # options emitted with CONFIG_ prefix but not available on the command line
1683 CONFIG_EXTRA="
1684     aandcttables
1685     ac3dsp
1686     audio_frame_queue
1687     audiodsp
1688     blockdsp
1689     bswapdsp
1690     cabac
1691     dirac_parse
1692     dvprofile
1693     faandct
1694     faanidct
1695     fdctdsp
1696     flacdsp
1697     fmtconvert
1698     g722dsp
1699     gcrypt
1700     gmp
1701     golomb
1702     gplv3
1703     h263dsp
1704     h264chroma
1705     h264dsp
1706     h264parse
1707     h264pred
1708     h264qpel
1709     hpeldsp
1710     huffman
1711     huffyuvdsp
1712     huffyuvencdsp
1713     idctdsp
1714     iirfilter
1715     imdct15
1716     intrax8
1717     iso_media
1718     ividsp
1719     jpegtables
1720     libx262
1721     lgplv3
1722     lpc
1723     lzf
1724     me_cmp
1725     mpeg_er
1726     mpegaudio
1727     mpegaudiodsp
1728     mpegvideo
1729     mpegvideoenc
1730     mss34dsp
1731     pixblockdsp
1732     qpeldsp
1733     qsv
1734     qsvdec
1735     qsvenc
1736     rangecoder
1737     riffdec
1738     riffenc
1739     rtpdec
1740     rtpenc_chain
1741     rv34dsp
1742     sinewin
1743     snappy
1744     srtp
1745     startcode
1746     texturedsp
1747     texturedspenc
1748     tpeldsp
1749     vaapi_encode
1750     vc1dsp
1751     videodsp
1752     vp3dsp
1753     vp56dsp
1754     vp8dsp
1755     wma_freqs
1756     wmv2dsp
1757 "
1758
1759 CMDLINE_SELECT="
1760     $ARCH_EXT_LIST
1761     $CONFIG_LIST
1762     $HAVE_LIST_CMDLINE
1763     $THREADS_LIST
1764     asm
1765     cross_compile
1766     debug
1767     extra_warnings
1768     logging
1769     lto
1770     optimizations
1771     rpath
1772 "
1773
1774 PATHS_LIST="
1775     bindir
1776     datadir
1777     docdir
1778     incdir
1779     libdir
1780     mandir
1781     prefix
1782     shlibdir
1783 "
1784
1785 CMDLINE_SET="
1786     $PATHS_LIST
1787     ar
1788     arch
1789     as
1790     build_suffix
1791     cc
1792     objcc
1793     cpu
1794     cross_prefix
1795     custom_allocator
1796     dep_cc
1797     env
1798     extra_version
1799     host_cc
1800     host_cflags
1801     host_ld
1802     host_ldflags
1803     host_libs
1804     host_os
1805     ld
1806     logfile
1807     malloc_prefix
1808     nm
1809     optflags
1810     pkg_config
1811     pkg_config_flags
1812     random_seed
1813     samples
1814     sysinclude
1815     sysroot
1816     target_exec
1817     target_os
1818     target_path
1819     target_samples
1820     toolchain
1821 "
1822
1823 CMDLINE_APPEND="
1824     extra_cflags
1825     extra_objcflags
1826     host_cppflags
1827 "
1828
1829 # code dependency declarations
1830
1831 # architecture extensions
1832
1833 armv5te_deps="arm"
1834 armv6_deps="arm"
1835 armv6t2_deps="arm"
1836 armv8_deps="aarch64"
1837 neon_deps_any="aarch64 arm"
1838 intrinsics_neon_deps="neon"
1839 vfp_deps_any="aarch64 arm"
1840 vfpv3_deps="vfp"
1841
1842 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1843
1844 altivec_deps="ppc"
1845 ppc4xx_deps="ppc"
1846 vsx_deps="altivec"
1847 power8_deps="vsx"
1848
1849 cpunop_deps="i686"
1850 x86_64_select="i686"
1851 x86_64_suggest="fast_cmov"
1852
1853 amd3dnow_deps="mmx"
1854 amd3dnowext_deps="amd3dnow"
1855 i686_deps="x86"
1856 mmx_deps="x86"
1857 mmxext_deps="mmx"
1858 sse_deps="mmxext"
1859 sse2_deps="sse"
1860 sse3_deps="sse2"
1861 ssse3_deps="sse3"
1862 sse4_deps="ssse3"
1863 sse42_deps="sse4"
1864 avx_deps="sse42"
1865 xop_deps="avx"
1866 fma3_deps="avx"
1867 fma4_deps="avx"
1868 avx2_deps="avx"
1869
1870 mmx_external_deps="yasm"
1871 mmx_inline_deps="inline_asm"
1872 mmx_suggest="mmx_external mmx_inline"
1873
1874 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1875     eval dep=\$${ext}_deps
1876     eval ${ext}_external_deps='"${dep}_external"'
1877     eval ${ext}_inline_deps='"${dep}_inline"'
1878     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1879 done
1880
1881 aligned_stack_if_any="aarch64 ppc x86"
1882 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1883 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1884 fast_unaligned_if_any="aarch64 ppc x86"
1885 simd_align_16_if_any="altivec neon sse"
1886 simd_align_32_if_any="avx"
1887
1888 # system capabilities
1889 symver_if_any="symver_asm_label symver_gnu_asm"
1890 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1891
1892 # threading support
1893 atomics_gcc_if="sync_val_compare_and_swap"
1894 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1895 atomics_win32_if="MemoryBarrier"
1896 atomics_native_if_any="$ATOMICS_LIST"
1897 w32threads_deps="atomics_native"
1898 threads_if_any="$THREADS_LIST"
1899
1900 # subsystems
1901 dct_select="rdft"
1902 dirac_parse_select="golomb"
1903 error_resilience_select="me_cmp"
1904 faandct_deps="faan fdctdsp"
1905 faanidct_deps="faan idctdsp"
1906 h264dsp_select="startcode"
1907 intrax8_select="blockdsp idctdsp"
1908 mdct_select="fft"
1909 rdft_select="fft"
1910 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1911 mpeg_er_select="error_resilience"
1912 mpegaudio_select="mpegaudiodsp"
1913 mpegaudiodsp_select="dct"
1914 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1915 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1916 vc1dsp_select="h264chroma qpeldsp startcode"
1917
1918 # decoders / encoders
1919 aac_decoder_select="imdct15 mdct sinewin"
1920 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1921 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1922 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1923 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1924 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1925 adpcm_g722_decoder_select="g722dsp"
1926 adpcm_g722_encoder_select="g722dsp"
1927 aic_decoder_select="golomb idctdsp"
1928 alac_encoder_select="lpc"
1929 als_decoder_select="bswapdsp"
1930 amrnb_decoder_select="lsp"
1931 amrwb_decoder_select="lsp"
1932 amv_decoder_select="sp5x_decoder"
1933 ape_decoder_select="bswapdsp"
1934 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1935 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1936 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1937 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1938 atrac1_decoder_select="mdct sinewin"
1939 atrac3_decoder_select="mdct"
1940 atrac3p_decoder_select="mdct sinewin"
1941 bink_decoder_select="blockdsp hpeldsp"
1942 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1943 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1944 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1945 cllc_decoder_select="bswapdsp"
1946 comfortnoise_encoder_select="lpc"
1947 cook_decoder_select="audiodsp mdct sinewin"
1948 cscd_decoder_select="lzo"
1949 cscd_decoder_suggest="zlib"
1950 dca_decoder_select="fmtconvert mdct"
1951 dds_decoder_select="texturedsp"
1952 dnxhd_decoder_select="blockdsp idctdsp"
1953 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1954 dvvideo_decoder_select="dvprofile idctdsp"
1955 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1956 dxa_decoder_deps="zlib"
1957 dxv_decoder_select="lzf texturedsp"
1958 eac3_decoder_select="ac3_decoder"
1959 eac3_encoder_select="ac3_encoder"
1960 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1961 eatgq_decoder_select="aandcttables idctdsp"
1962 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1963 exr_decoder_deps="zlib"
1964 ffv1_decoder_select="golomb rangecoder"
1965 ffv1_encoder_select="rangecoder"
1966 ffvhuff_decoder_select="huffyuv_decoder"
1967 ffvhuff_encoder_select="huffyuv_encoder"
1968 fic_decoder_select="golomb"
1969 flac_decoder_select="flacdsp golomb"
1970 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1971 flashsv_decoder_deps="zlib"
1972 flashsv_encoder_deps="zlib"
1973 flashsv2_decoder_deps="zlib"
1974 flv_decoder_select="h263_decoder"
1975 flv_encoder_select="h263_encoder"
1976 fourxm_decoder_select="blockdsp bswapdsp"
1977 fraps_decoder_select="bswapdsp huffman"
1978 g2m_decoder_deps="zlib"
1979 g2m_decoder_select="blockdsp idctdsp jpegtables"
1980 h261_decoder_select="mpeg_er mpegvideo"
1981 h261_encoder_select="aandcttables mpegvideoenc"
1982 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1983 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1984 h263i_decoder_select="h263_decoder"
1985 h263p_encoder_select="h263_encoder"
1986 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
1987 h264_decoder_suggest="error_resilience"
1988 hap_decoder_select="snappy texturedsp"
1989 hap_encoder_deps="libsnappy"
1990 hap_encoder_select="texturedspenc"
1991 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1992 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1993 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1994 iac_decoder_select="imc_decoder"
1995 imc_decoder_select="bswapdsp fft mdct sinewin"
1996 indeo3_decoder_select="hpeldsp"
1997 indeo4_decoder_select="ividsp"
1998 indeo5_decoder_select="ividsp"
1999 interplay_video_decoder_select="hpeldsp"
2000 jpegls_decoder_select="golomb mjpeg_decoder"
2001 jpegls_encoder_select="golomb"
2002 jv_decoder_select="blockdsp"
2003 lagarith_decoder_select="huffyuvdsp"
2004 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2005 loco_decoder_select="golomb"
2006 magicyuv_decoder_select="huffyuvdsp"
2007 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2008 metasound_decoder_select="lsp mdct sinewin"
2009 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2010 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2011 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2012 mjpegb_decoder_select="mjpeg_decoder"
2013 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2014 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2015 mlp_decoder_select="mlp_parser"
2016 motionpixels_decoder_select="bswapdsp"
2017 mp1_decoder_select="mpegaudio"
2018 mp1float_decoder_select="mpegaudio"
2019 mp2_decoder_select="mpegaudio"
2020 mp2float_decoder_select="mpegaudio"
2021 mp3_decoder_select="mpegaudio"
2022 mp3adu_decoder_select="mpegaudio"
2023 mp3adufloat_decoder_select="mpegaudio"
2024 mp3float_decoder_select="mpegaudio"
2025 mp3on4_decoder_select="mpegaudio"
2026 mp3on4float_decoder_select="mpegaudio"
2027 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2028 mpc8_decoder_select="mpegaudiodsp"
2029 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2030 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2031 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2032 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2033 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2034 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2035 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2036 mpeg4_encoder_select="h263_encoder"
2037 msa1_decoder_select="mss34dsp"
2038 msmpeg4v1_decoder_select="h263_decoder"
2039 msmpeg4v2_decoder_select="h263_decoder"
2040 msmpeg4v2_encoder_select="h263_encoder"
2041 msmpeg4v3_decoder_select="h263_decoder"
2042 msmpeg4v3_encoder_select="h263_encoder"
2043 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2044 mts2_decoder_select="mss34dsp"
2045 mxpeg_decoder_select="mjpeg_decoder"
2046 nellymoser_decoder_select="mdct sinewin"
2047 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2048 nuv_decoder_select="idctdsp lzo"
2049 on2avc_decoder_select="mdct"
2050 opus_decoder_deps="avresample"
2051 opus_decoder_select="imdct15"
2052 png_decoder_deps="zlib"
2053 png_encoder_deps="zlib"
2054 png_encoder_select="huffyuvencdsp"
2055 prores_decoder_select="idctdsp"
2056 prores_encoder_select="fdctdsp"
2057 qcelp_decoder_select="lsp"
2058 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2059 ra_144_encoder_select="audio_frame_queue lpc"
2060 ralf_decoder_select="golomb"
2061 rscc_decoder_deps="zlib"
2062 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2063 rv10_encoder_select="h263_encoder"
2064 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2065 rv20_encoder_select="h263_encoder"
2066 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2067 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2068 screenpresso_decoder_deps="zlib"
2069 shorten_decoder_select="golomb"
2070 sipr_decoder_select="lsp"
2071 sp5x_decoder_select="mjpeg_decoder"
2072 svq1_decoder_select="hpeldsp"
2073 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2074 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2075 svq3_decoder_suggest="zlib"
2076 tak_decoder_select="audiodsp"
2077 tdsc_decoder_deps="zlib"
2078 tdsc_decoder_select="mjpeg_decoder"
2079 theora_decoder_select="vp3_decoder"
2080 thp_decoder_select="mjpeg_decoder"
2081 tiff_decoder_suggest="zlib"
2082 tiff_encoder_suggest="zlib"
2083 truehd_decoder_select="mlp_decoder"
2084 truemotion2_decoder_select="bswapdsp"
2085 truespeech_decoder_select="bswapdsp"
2086 tscc_decoder_deps="zlib"
2087 txd_decoder_select="texturedsp"
2088 twinvq_decoder_select="mdct lsp sinewin"
2089 utvideo_decoder_select="bswapdsp"
2090 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2091 vble_decoder_select="huffyuvdsp"
2092 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2093 vc1image_decoder_select="vc1_decoder"
2094 vorbis_decoder_select="mdct"
2095 vorbis_encoder_select="mdct"
2096 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2097 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2098 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2099 vp6a_decoder_select="vp6_decoder"
2100 vp6f_decoder_select="vp6_decoder"
2101 vp7_decoder_select="h264pred videodsp vp8dsp"
2102 vp8_decoder_select="h264pred videodsp vp8dsp"
2103 vp9_decoder_select="videodsp"
2104 webp_decoder_select="vp8_decoder"
2105 wmapro_decoder_select="mdct sinewin wma_freqs"
2106 wmav1_decoder_select="mdct sinewin wma_freqs"
2107 wmav1_encoder_select="mdct sinewin wma_freqs"
2108 wmav2_decoder_select="mdct sinewin wma_freqs"
2109 wmav2_encoder_select="mdct sinewin wma_freqs"
2110 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2111 wmv1_decoder_select="h263_decoder"
2112 wmv1_encoder_select="h263_encoder"
2113 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2114 wmv2_encoder_select="h263_encoder wmv2dsp"
2115 wmv3_decoder_select="vc1_decoder"
2116 wmv3image_decoder_select="wmv3_decoder"
2117 zerocodec_decoder_deps="zlib"
2118 zlib_decoder_deps="zlib"
2119 zlib_encoder_deps="zlib"
2120 zmbv_decoder_deps="zlib"
2121 zmbv_encoder_deps="zlib"
2122
2123 # hardware accelerators
2124 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2125 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2126 vaapi_deps="va_va_h"
2127 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2128 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2129 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2130
2131 h263_vaapi_hwaccel_deps="vaapi"
2132 h263_vaapi_hwaccel_select="h263_decoder"
2133 h264_d3d11va_hwaccel_deps="d3d11va"
2134 h264_d3d11va_hwaccel_select="h264_decoder"
2135 h264_dxva2_hwaccel_deps="dxva2"
2136 h264_dxva2_hwaccel_select="h264_decoder"
2137 h264_mmal_decoder_deps="mmal"
2138 h264_mmal_decoder_select="mmal"
2139 h264_mmal_hwaccel_deps="mmal"
2140 h264_omx_encoder_deps="omx"
2141 h264_qsv_hwaccel_deps="libmfx"
2142 h264_vaapi_hwaccel_deps="vaapi"
2143 h264_vaapi_hwaccel_select="h264_decoder"
2144 h264_vda_hwaccel_deps="vda"
2145 h264_vda_hwaccel_select="h264_decoder"
2146 h264_vda_old_hwaccel_deps="vda"
2147 h264_vda_old_hwaccel_select="h264_decoder"
2148 h264_vdpau_hwaccel_deps="vdpau"
2149 h264_vdpau_hwaccel_select="h264_decoder"
2150 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2151 hevc_d3d11va_hwaccel_select="hevc_decoder"
2152 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2153 hevc_dxva2_hwaccel_select="hevc_decoder"
2154 hevc_qsv_hwaccel_deps="libmfx"
2155 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2156 hevc_vdpau_hwaccel_select="hevc_decoder"
2157 mpeg1_vdpau_hwaccel_deps="vdpau"
2158 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2159 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2160 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2161 mpeg2_dxva2_hwaccel_deps="dxva2"
2162 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2163 mpeg2_mmal_decoder_deps="mmal"
2164 mpeg2_mmal_decoder_select="mmal"
2165 mpeg2_mmal_hwaccel_deps="mmal"
2166 mpeg2_qsv_hwaccel_deps="libmfx"
2167 mpeg2_vaapi_hwaccel_deps="vaapi"
2168 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2169 mpeg2_vdpau_hwaccel_deps="vdpau"
2170 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2171 mpeg4_omx_encoder_deps="omx"
2172 mpeg4_vaapi_hwaccel_deps="vaapi"
2173 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2174 mpeg4_vdpau_hwaccel_deps="vdpau"
2175 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2176 vc1_d3d11va_hwaccel_deps="d3d11va"
2177 vc1_d3d11va_hwaccel_select="vc1_decoder"
2178 vc1_dxva2_hwaccel_deps="dxva2"
2179 vc1_dxva2_hwaccel_select="vc1_decoder"
2180 vc1_mmal_decoder_deps="mmal"
2181 vc1_mmal_decoder_select="mmal"
2182 vc1_mmal_hwaccel_deps="mmal"
2183 vc1_vaapi_hwaccel_deps="vaapi"
2184 vc1_vaapi_hwaccel_select="vc1_decoder"
2185 vc1_vdpau_hwaccel_deps="vdpau"
2186 vc1_vdpau_hwaccel_select="vc1_decoder"
2187 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2188 vp8_vaapi_hwaccel_select="vp8_decoder"
2189 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2190 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2191 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2192 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2193
2194 # hardware-accelerated codecs
2195 nvenc_deps_any="dlopen LoadLibrary"
2196 nvenc_extralibs='$ldl'
2197 omx_deps="dlopen pthreads"
2198 omx_extralibs='$ldl'
2199 qsvdec_select="qsv"
2200 qsvenc_select="qsv"
2201 vaapi_encode_deps="vaapi"
2202
2203 hwupload_cuda_filter_deps="cuda"
2204 scale_npp_filter_deps="cuda libnpp"
2205
2206 h264_nvenc_encoder_deps="nvenc"
2207 h264_qsv_decoder_deps="libmfx"
2208 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2209 h264_qsv_encoder_deps="libmfx"
2210 h264_qsv_encoder_select="qsvenc"
2211 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2212 h264_vaapi_encoder_select="vaapi_encode golomb"
2213
2214 hevc_nvenc_encoder_deps="nvenc"
2215 hevc_qsv_decoder_deps="libmfx"
2216 hevc_qsv_encoder_deps="libmfx"
2217 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2218 hevc_qsv_encoder_select="qsvenc"
2219 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2220 hevc_vaapi_encoder_select="vaapi_encode golomb"
2221 mpeg2_qsv_decoder_deps="libmfx"
2222 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2223 mpeg2_qsv_encoder_deps="libmfx"
2224 mpeg2_qsv_encoder_select="qsvenc"
2225
2226 nvenc_h264_encoder_deps="nvenc"
2227 nvenc_hevc_encoder_deps="nvenc"
2228
2229 # parsers
2230 h264_parser_select="golomb h264dsp h264parse"
2231 hevc_parser_select="golomb"
2232 mpegvideo_parser_select="mpegvideo"
2233 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2234 vc1_parser_select="vc1dsp"
2235
2236 # bitstream_filters
2237 mjpeg2jpeg_bsf_select="jpegtables"
2238
2239 # external libraries
2240 libdcadec_decoder_deps="libdcadec"
2241 libfaac_encoder_deps="libfaac"
2242 libfaac_encoder_select="audio_frame_queue"
2243 libfdk_aac_decoder_deps="libfdk_aac"
2244 libfdk_aac_encoder_deps="libfdk_aac"
2245 libfdk_aac_encoder_select="audio_frame_queue"
2246 libgsm_decoder_deps="libgsm"
2247 libgsm_encoder_deps="libgsm"
2248 libgsm_ms_decoder_deps="libgsm"
2249 libgsm_ms_encoder_deps="libgsm"
2250 libilbc_decoder_deps="libilbc"
2251 libilbc_encoder_deps="libilbc"
2252 libkvazaar_encoder_deps="libkvazaar"
2253 libmp3lame_encoder_deps="libmp3lame"
2254 libmp3lame_encoder_select="audio_frame_queue"
2255 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2256 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2257 libopencore_amrnb_encoder_select="audio_frame_queue"
2258 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2259 libopenh264_decoder_deps="libopenh264"
2260 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2261 libopenh264_encoder_deps="libopenh264"
2262 libopenjpeg_decoder_deps="libopenjpeg"
2263 libopenjpeg_encoder_deps="libopenjpeg"
2264 libopus_decoder_deps="libopus"
2265 libopus_encoder_deps="libopus"
2266 libopus_encoder_select="audio_frame_queue"
2267 libschroedinger_decoder_deps="libschroedinger"
2268 libschroedinger_encoder_deps="libschroedinger"
2269 libspeex_decoder_deps="libspeex"
2270 libspeex_encoder_deps="libspeex"
2271 libspeex_encoder_select="audio_frame_queue"
2272 libtheora_encoder_deps="libtheora"
2273 libtwolame_encoder_deps="libtwolame"
2274 libvo_aacenc_encoder_deps="libvo_aacenc"
2275 libvo_aacenc_encoder_select="audio_frame_queue"
2276 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2277 libvorbis_encoder_deps="libvorbis"
2278 libvorbis_encoder_select="audio_frame_queue"
2279 libvpx_vp8_decoder_deps="libvpx"
2280 libvpx_vp8_encoder_deps="libvpx"
2281 libvpx_vp9_decoder_deps="libvpx"
2282 libvpx_vp9_encoder_deps="libvpx"
2283 libwavpack_encoder_deps="libwavpack"
2284 libwebp_encoder_deps="libwebp"
2285 libx262_encoder_deps="libx262"
2286 libx264_encoder_deps="libx264"
2287 libx265_encoder_deps="libx265"
2288 libxavs_encoder_deps="libxavs"
2289 libxvid_encoder_deps="libxvid"
2290
2291 # demuxers / muxers
2292 ac3_demuxer_select="ac3_parser"
2293 asf_demuxer_select="riffdec"
2294 asf_muxer_select="riffenc"
2295 asf_stream_muxer_select="asf_muxer"
2296 avi_demuxer_select="iso_media riffdec"
2297 avi_muxer_select="riffenc"
2298 avisynth_demuxer_deps="avisynth"
2299 avisynth_demuxer_select="riffdec"
2300 caf_demuxer_select="iso_media riffdec"
2301 dash_muxer_select="mp4_muxer"
2302 dirac_demuxer_select="dirac_parser"
2303 dv_demuxer_select="dvprofile"
2304 dv_muxer_select="dvprofile"
2305 dxa_demuxer_select="riffdec"
2306 eac3_demuxer_select="ac3_parser"
2307 f4v_muxer_select="mov_muxer"
2308 flac_demuxer_select="flac_parser"
2309 hds_muxer_select="flv_muxer"
2310 hls_muxer_select="mpegts_muxer"
2311 ipod_muxer_select="mov_muxer"
2312 ismv_muxer_select="mov_muxer"
2313 matroska_audio_muxer_select="matroska_muxer"
2314 matroska_demuxer_select="iso_media riffdec"
2315 matroska_demuxer_suggest="bzlib lzo zlib"
2316 matroska_muxer_select="iso_media riffenc"
2317 mmf_muxer_select="riffenc"
2318 mov_demuxer_select="iso_media riffdec"
2319 mov_demuxer_suggest="zlib"
2320 mov_muxer_select="iso_media riffenc rtpenc_chain"
2321 mp3_demuxer_select="mpegaudio_parser"
2322 mp4_muxer_select="mov_muxer"
2323 mpegts_demuxer_select="iso_media"
2324 mpegts_muxer_select="adts_muxer latm_muxer"
2325 mpegtsraw_demuxer_select="mpegts_demuxer"
2326 mxf_d10_muxer_select="mxf_muxer"
2327 nut_muxer_select="riffenc"
2328 nuv_demuxer_select="riffdec"
2329 oga_muxer_select="ogg_muxer"
2330 ogg_demuxer_select="dirac_parse"
2331 opus_muxer_select="ogg_muxer"
2332 psp_muxer_select="mov_muxer"
2333 rtp_demuxer_select="sdp_demuxer"
2334 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2335 rtsp_demuxer_select="http_protocol rtpdec"
2336 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2337 sap_demuxer_select="sdp_demuxer"
2338 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2339 sdp_demuxer_select="rtpdec"
2340 smoothstreaming_muxer_select="ismv_muxer"
2341 spdif_muxer_select="aac_parser"
2342 spx_muxer_select="ogg_muxer"
2343 swf_demuxer_suggest="zlib"
2344 tak_demuxer_select="tak_parser"
2345 tg2_muxer_select="mov_muxer"
2346 tgp_muxer_select="mov_muxer"
2347 w64_demuxer_select="wav_demuxer"
2348 wav_demuxer_select="riffdec"
2349 wav_muxer_select="riffenc"
2350 webm_muxer_select="iso_media riffenc"
2351 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2352 wtv_demuxer_select="mpegts_demuxer riffdec"
2353 xmv_demuxer_select="riffdec"
2354 xwma_demuxer_select="riffdec"
2355
2356 # indevs / outdevs
2357 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2358 alsa_outdev_deps="alsa_asoundlib_h"
2359 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2360 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2361 dv1394_indev_deps="dv1394"
2362 dv1394_indev_select="dv_demuxer"
2363 fbdev_indev_deps="linux_fb_h"
2364 jack_indev_deps="jack_jack_h"
2365 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2366 libcdio_indev_deps="libcdio"
2367 libdc1394_indev_deps="libdc1394"
2368 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2369 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2370 pulse_indev_deps="libpulse"
2371 sndio_indev_deps="sndio_h"
2372 sndio_outdev_deps="sndio_h"
2373 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2374 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2375 vfwcap_indev_extralibs="-lavicap32"
2376 xcbgrab_indev_deps="libxcb"
2377
2378 # protocols
2379 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2380 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2381 ffrtmpcrypt_protocol_select="tcp_protocol"
2382 ffrtmphttp_protocol_deps="!librtmp_protocol"
2383 ffrtmphttp_protocol_select="http_protocol"
2384 gopher_protocol_select="network"
2385 http_protocol_select="tcp_protocol"
2386 httpproxy_protocol_select="tcp_protocol"
2387 https_protocol_select="tls_protocol"
2388 icecast_protocol_select="http_protocol"
2389 librtmp_protocol_deps="librtmp"
2390 librtmpe_protocol_deps="librtmp"
2391 librtmps_protocol_deps="librtmp"
2392 librtmpt_protocol_deps="librtmp"
2393 librtmpte_protocol_deps="librtmp"
2394 mmsh_protocol_select="http_protocol"
2395 mmst_protocol_select="network"
2396 rtmp_protocol_deps="!librtmp_protocol"
2397 rtmp_protocol_select="tcp_protocol"
2398 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2399 rtmps_protocol_deps="!librtmp_protocol"
2400 rtmps_protocol_select="tls_protocol"
2401 rtmpt_protocol_select="ffrtmphttp_protocol"
2402 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2403 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2404 rtp_protocol_select="udp_protocol"
2405 sctp_protocol_deps="struct_sctp_event_subscribe"
2406 sctp_protocol_select="network"
2407 srtp_protocol_select="rtp_protocol srtp"
2408 tcp_protocol_select="network"
2409 tls_gnutls_protocol_deps="gnutls"
2410 tls_gnutls_protocol_select="tcp_protocol"
2411 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2412 tls_openssl_protocol_select="tcp_protocol"
2413 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2414 udp_protocol_select="network"
2415 unix_protocol_deps="sys_un_h"
2416 unix_protocol_select="network"
2417
2418 # filters
2419 blackframe_filter_deps="gpl"
2420 boxblur_filter_deps="gpl"
2421 bs2b_filter_deps="libbs2b"
2422 cropdetect_filter_deps="gpl"
2423 deinterlace_qsv_filter_deps="libmfx"
2424 delogo_filter_deps="gpl"
2425 drawtext_filter_deps="libfreetype"
2426 frei0r_filter_deps="frei0r dlopen"
2427 frei0r_filter_extralibs='$ldl'
2428 frei0r_src_filter_deps="frei0r dlopen"
2429 frei0r_src_filter_extralibs='$ldl'
2430 hdcd_filter_deps="libhdcd"
2431 hqdn3d_filter_deps="gpl"
2432 interlace_filter_deps="gpl"
2433 ocv_filter_deps="libopencv"
2434 resample_filter_deps="avresample"
2435 scale_filter_deps="swscale"
2436 scale_qsv_filter_deps="libmfx"
2437 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2438
2439 # examples
2440 decode_audio_example_deps="avcodec avutil"
2441 decode_video_example_deps="avcodec avutil"
2442 encode_audio_example_deps="avcodec avutil"
2443 encode_video_example_deps="avcodec avutil"
2444 filter_audio_example_deps="avfilter avutil"
2445 metadata_example_deps="avformat avutil"
2446 output_example_deps="avcodec avformat avutil swscale"
2447 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2448 transcode_aac_example_deps="avcodec avformat avresample"
2449
2450 # libraries, in linking order
2451 avcodec_deps="avutil"
2452 avdevice_deps="avformat avcodec avutil"
2453 avfilter_deps="avutil"
2454 avformat_deps="avcodec avutil"
2455 avresample_deps="avutil"
2456 swscale_deps="avutil"
2457
2458 # programs
2459 avconv_deps="avcodec avfilter avformat avresample swscale"
2460 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2461                fps_filter null_filter resample_filter scale_filter
2462                trim_filter"
2463 avplay_deps="avcodec avfilter avformat avresample sdl"
2464 avplay_libs='$sdl_libs'
2465 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2466 avprobe_deps="avcodec avformat"
2467
2468 # documentation
2469 pod2man_deps="doc"
2470 texi2html_deps="doc"
2471
2472 # default parameters
2473
2474 logfile="config.log"
2475
2476 # installation paths
2477 prefix_default="/usr/local"
2478 bindir_default='${prefix}/bin'
2479 datadir_default='${prefix}/share/avconv'
2480 docdir_default='${prefix}/share/doc/libav'
2481 incdir_default='${prefix}/include'
2482 libdir_default='${prefix}/lib'
2483 mandir_default='${prefix}/share/man'
2484 shlibdir_default="$libdir_default"
2485
2486 # toolchain
2487 ar_default="ar"
2488 cc_default="gcc"
2489 host_cc_default="gcc"
2490 cp_f="cp -f"
2491 ln_s="ln -s -f"
2492 nm_default="nm -g"
2493 objformat="elf"
2494 pkg_config_default=pkg-config
2495 ranlib="ranlib"
2496 strip="strip"
2497 version_script='--version-script'
2498 yasmexe="yasm"
2499
2500 # machine
2501 arch_default=$(uname -m)
2502 cpu="generic"
2503 intrinsics="none"
2504
2505 # OS
2506 target_os_default=$(tolower $(uname -s))
2507 host_os=$target_os_default
2508
2509 # configurable options
2510 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2511
2512 enable asm
2513 enable debug
2514 enable doc
2515 enable faan faandct faanidct
2516 enable optimizations
2517 enable safe_bitstream_reader
2518 enable static
2519 enable swscale_alpha
2520 enable valgrind_backtrace
2521
2522 # By default, enable only those hwaccels that have no external dependencies.
2523 enable d3d11va dxva2 vda vdpau
2524
2525 # build settings
2526 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2527 LIBPREF="lib"
2528 LIBSUF=".a"
2529 FULLNAME='$(NAME)$(BUILDSUF)'
2530 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2531 SLIBPREF="lib"
2532 SLIBSUF=".so"
2533 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2534 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2535 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2536 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2537 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2538 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2539 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2540
2541 asflags_filter=echo
2542 cflags_filter=echo
2543 ldflags_filter=echo
2544
2545 AS_C='-c'
2546 AS_O='-o $@'
2547 CC_C='-c'
2548 CC_E='-E -o $@'
2549 CC_O='-o $@'
2550 OBJCC_C='-c'
2551 OBJCC_E='-E -o $@'
2552 OBJCC_O='-o $@'
2553 LD_O='-o $@'
2554 LD_LIB='-l%'
2555 LD_PATH='-L'
2556 HOSTCC_C='-c'
2557 HOSTCC_E='-E -o $@'
2558 HOSTCC_O='-o $@'
2559 HOSTLD_O='-o $@'
2560
2561 host_libs='-lm'
2562 host_cflags_filter=echo
2563 host_ldflags_filter=echo
2564
2565 target_path='$(CURDIR)'
2566
2567 # since the object filename is not given with the -MM flag, the compiler
2568 # is only able to print the basename, and we must add the path ourselves
2569 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2570 DEPFLAGS='-MM'
2571
2572 # find source path
2573 if test -f configure; then
2574     source_path=.
2575 else
2576     source_path=$(cd $(dirname "$0"); pwd)
2577     echo "$source_path" | grep -q '[[:blank:]]' &&
2578         die "Out of tree builds are impossible with whitespace in source path."
2579     test -e "$source_path/config.h" &&
2580         die "Out of tree builds are impossible with config.h in source dir."
2581 fi
2582
2583 for v in "$@"; do
2584     r=${v#*=}
2585     l=${v%"$r"}
2586     r=$(sh_quote "$r")
2587     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2588 done
2589
2590 find_things(){
2591     thing=$1
2592     pattern=$2
2593     file=$source_path/$3
2594     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2595 }
2596
2597 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2598 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2599 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2600 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2601 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2602 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2603 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2604 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2605 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2606
2607 find_things_extern(){
2608     thing=$1
2609     pattern=$2
2610     file=$source_path/$3
2611     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2612 }
2613
2614 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2615 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2616
2617 ALL_COMPONENTS="
2618     $BSF_LIST
2619     $DECODER_LIST
2620     $DEMUXER_LIST
2621     $ENCODER_LIST
2622     $FILTER_LIST
2623     $HWACCEL_LIST
2624     $INDEV_LIST
2625     $MUXER_LIST
2626     $OUTDEV_LIST
2627     $PARSER_LIST
2628     $PROTOCOL_LIST
2629 "
2630
2631 for n in $COMPONENT_LIST; do
2632     v=$(toupper ${n%s})_LIST
2633     eval enable \$$v
2634     eval ${n}_if_any="\$$v"
2635 done
2636
2637 enable $ARCH_EXT_LIST
2638
2639 die_unknown(){
2640     echo "Unknown option \"$1\"."
2641     echo "See $0 --help for available options."
2642     exit 1
2643 }
2644
2645 print_3_columns() {
2646     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2647 }
2648
2649 show_list() {
2650     suffix=_$1
2651     shift
2652     echo $* | sed s/$suffix//g | print_3_columns
2653     exit 0
2654 }
2655
2656 rand_list(){
2657     IFS=', '
2658     set -- $*
2659     unset IFS
2660     for thing; do
2661         comp=${thing%:*}
2662         prob=${thing#$comp}
2663         prob=${prob#:}
2664         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2665         echo "prob ${prob:-0.5}"
2666         printf '%s\n' $comp
2667     done
2668 }
2669
2670 do_random(){
2671     action=$1
2672     shift
2673     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2674     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2675 }
2676
2677 for opt do
2678     optval="${opt#*=}"
2679     case "$opt" in
2680         --extra-ldflags=*)
2681             add_ldflags $optval
2682         ;;
2683         --extra-ldexeflags=*)
2684             add_ldexeflags $optval
2685         ;;
2686         --extra-libs=*)
2687             add_extralibs $optval
2688         ;;
2689         --disable-devices)
2690             disable $INDEV_LIST $OUTDEV_LIST
2691         ;;
2692         --enable-debug=*)
2693             debuglevel="$optval"
2694         ;;
2695         --disable-programs)
2696             disable $PROGRAM_LIST
2697         ;;
2698         --disable-everything)
2699             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2700         ;;
2701         --disable-all)
2702             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2703             disable $LIBRARY_LIST $PROGRAM_LIST doc
2704         ;;
2705         --enable-random|--disable-random)
2706             action=${opt%%-random}
2707             do_random ${action#--} $COMPONENT_LIST
2708         ;;
2709         --enable-random=*|--disable-random=*)
2710             action=${opt%%-random=*}
2711             do_random ${action#--} $optval
2712         ;;
2713         --enable-*=*|--disable-*=*)
2714             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2715             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2716             eval list=\$$(toupper $thing)_LIST
2717             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2718             $action $(filter "$name" $list)
2719         ;;
2720         --enable-avserver|--disable-avserver*)
2721             warn "avserver has been removed, the ${opt} option is only"\
2722                  "provided for compatibility and will be removed in the future"
2723         ;;
2724         --enable-?*|--disable-?*)
2725             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2726             if is_in $option $COMPONENT_LIST; then
2727                 test $action = disable && action=unset
2728                 eval $action \$$(toupper ${option%s})_LIST
2729             elif is_in $option $CMDLINE_SELECT; then
2730                 $action $option
2731             else
2732                 die_unknown $opt
2733             fi
2734         ;;
2735         --list-*)
2736             NAME="${opt#--list-}"
2737             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2738             NAME=${NAME%s}
2739             eval show_list $NAME \$$(toupper $NAME)_LIST
2740         ;;
2741         --help|-h) show_help
2742         ;;
2743         *)
2744             optname="${opt%%=*}"
2745             optname="${optname#--}"
2746             optname=$(echo "$optname" | sed 's/-/_/g')
2747             if is_in $optname $CMDLINE_SET; then
2748                 eval $optname='$optval'
2749             elif is_in $optname $CMDLINE_APPEND; then
2750                 append $optname "$optval"
2751             else
2752                 die_unknown $opt
2753             fi
2754         ;;
2755     esac
2756 done
2757
2758 for e in $env; do
2759     eval "export $e"
2760 done
2761
2762 disabled logging && logfile=/dev/null
2763
2764 # Disable all the library-specific components if the library itself
2765 # is disabled, see AVCODEC_LIST and following _LIST variables.
2766
2767 disable_components(){
2768     disabled ${1} && disable $(
2769         eval components="\$$(toupper ${1})_COMPONENTS"
2770         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2771     )
2772 }
2773
2774 map 'disable_components $v' $LIBRARY_LIST
2775
2776 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2777 set >> $logfile
2778
2779 case "$toolchain" in
2780     *-asan)
2781         cc_default="${toolchain%-asan}"
2782         add_cflags  -fsanitize=address
2783         add_ldflags -fsanitize=address
2784     ;;
2785     *-msan)
2786         cc_default="${toolchain%-msan}"
2787         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2788         add_ldflags -fsanitize=memory
2789     ;;
2790     *-tsan)
2791         cc_default="${toolchain%-tsan}"
2792         add_cflags  -fsanitize=thread -pie
2793         add_ldflags -fsanitize=thread -pie
2794         case "$toolchain" in
2795             gcc-tsan)
2796                 add_cflags  -fPIC
2797                 add_ldflags -fPIC
2798                 ;;
2799         esac
2800     ;;
2801     *-usan)
2802         cc_default="${toolchain%-usan}"
2803         add_cflags  -fsanitize=undefined
2804         add_ldflags -fsanitize=undefined
2805         case "$toolchain" in
2806             clang-usan)
2807                 add_cflags -O1
2808                 ;;
2809         esac
2810     ;;
2811     valgrind-*)
2812         target_exec_default="valgrind"
2813         case "$toolchain" in
2814             valgrind-massif)
2815                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2816                 ;;
2817             valgrind-memcheck)
2818                 target_exec_args="--track-origins=yes --leak-check=full"
2819                 ;;
2820         esac
2821     ;;
2822     msvc)
2823         # Check whether the current MSVC version needs the C99 converter.
2824         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2825         # support enough of C99 to build libav. Default to the new
2826         # behaviour if the regexp was unable to match anything, since this
2827         # successfully parses the version number of existing supported
2828         # versions that require the converter (MSVC 2010 and 2012).
2829         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2830         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2831             cc_default="cl"
2832         else
2833             cc_default="c99wrap cl"
2834         fi
2835         ld_default="$source_path/compat/windows/mslink"
2836         nm_default="dumpbin -symbols"
2837         ar_default="lib"
2838         case "$arch" in
2839         arm*)
2840             as_default="armasm"
2841             ;;
2842         esac
2843         target_os_default="win32"
2844         # Use a relative path for TMPDIR. This makes sure all the
2845         # ffconf temp files are written with a relative path, avoiding
2846         # issues with msys/win32 path conversion for MSVC parameters
2847         # such as -Fo<file> or -out:<file>.
2848         TMPDIR=.
2849     ;;
2850     icl)
2851         cc_default="icl"
2852         ld_default="xilink"
2853         nm_default="dumpbin -symbols"
2854         ar_default="xilib"
2855         target_os_default="win32"
2856         TMPDIR=.
2857     ;;
2858     gcov)
2859         add_cflags  -fprofile-arcs -ftest-coverage
2860         add_ldflags -fprofile-arcs -ftest-coverage
2861     ;;
2862     llvm-cov)
2863         add_cflags -fprofile-arcs -ftest-coverage
2864         add_ldflags --coverage
2865     ;;
2866     hardened)
2867         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2868         add_cflags   -fno-strict-overflow -fstack-protector-all
2869         add_ldflags  -Wl,-z,relro -Wl,-z,now
2870     ;;
2871     ?*)
2872         die "Unknown toolchain $toolchain"
2873     ;;
2874 esac
2875
2876 test -n "$cross_prefix" && enable cross_compile
2877
2878 if enabled cross_compile; then
2879     test -n "$arch" && test -n "$target_os" ||
2880         die "Must specify target arch and OS when cross-compiling"
2881 fi
2882
2883 ar_default="${cross_prefix}${ar_default}"
2884 cc_default="${cross_prefix}${cc_default}"
2885 occ_default="${cross_prefix}${occ_default}"
2886 nm_default="${cross_prefix}${nm_default}"
2887 pkg_config_default="${cross_prefix}${pkg_config_default}"
2888 ranlib="${cross_prefix}${ranlib}"
2889 strip="${cross_prefix}${strip}"
2890
2891 sysinclude_default="${sysroot}/usr/include"
2892
2893 set_default arch cc pkg_config sysinclude target_exec target_os
2894 enabled cross_compile || host_cc_default=$cc
2895 set_default host_cc
2896
2897 if ! $pkg_config --version >/dev/null 2>&1; then
2898     warn "$pkg_config not found, library detection may fail."
2899     pkg_config=false
2900 fi
2901
2902 exesuf() {
2903     case $1 in
2904         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2905     esac
2906 }
2907
2908 EXESUF=$(exesuf $target_os)
2909 HOSTEXESUF=$(exesuf $host_os)
2910
2911 # set temporary file name
2912 : ${TMPDIR:=$TEMPDIR}
2913 : ${TMPDIR:=$TMP}
2914 : ${TMPDIR:=/tmp}
2915
2916 if ! check_cmd mktemp -u XXXXXX; then
2917     # simple replacement for missing mktemp
2918     # NOT SAFE FOR GENERAL USE
2919     mktemp(){
2920         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2921     }
2922 fi
2923
2924 tmpfile(){
2925     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2926         (set -C; exec > $tmp) 2>/dev/null ||
2927         die "Unable to create temporary file in $TMPDIR."
2928     append TMPFILES $tmp
2929     eval $1=$tmp
2930 }
2931
2932 trap 'rm -f -- $TMPFILES' EXIT
2933
2934 tmpfile TMPASM .asm
2935 tmpfile TMPC   .c
2936 tmpfile TMPE   $EXESUF
2937 tmpfile TMPH   .h
2938 tmpfile TMPO   .o
2939 tmpfile TMPS   .S
2940 tmpfile TMPSH  .sh
2941 tmpfile TMPV   .ver
2942
2943 unset -f mktemp
2944
2945 chmod +x $TMPE
2946
2947 # make sure we can execute files in $TMPDIR
2948 cat > $TMPSH 2>> $logfile <<EOF
2949 #! /bin/sh
2950 EOF
2951 chmod +x $TMPSH >> $logfile 2>&1
2952 if ! $TMPSH >> $logfile 2>&1; then
2953     cat <<EOF
2954 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2955 variable to another directory and make sure that it is not mounted noexec.
2956 EOF
2957     die "Sanity test failed."
2958 fi
2959
2960 armasm_flags(){
2961     for flag; do
2962         case $flag in
2963             # Filter out MSVC cl.exe options from cflags that shouldn't
2964             # be passed to gas-preprocessor
2965             -M[TD]*)                                            ;;
2966             *)                  echo $flag                      ;;
2967         esac
2968    done
2969 }
2970
2971 ccc_flags(){
2972     for flag; do
2973         case $flag in
2974             -std=c99)           echo -c99                       ;;
2975             -mcpu=*)            echo -arch ${flag#*=}           ;;
2976             -mieee)             echo -ieee                      ;;
2977             -O*|-fast)          echo $flag                      ;;
2978             -fno-math-errno)    echo -assume nomath_errno       ;;
2979             -g)                 echo -g3                        ;;
2980             -Wall)              echo -msg_enable level2         ;;
2981             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2982             -Wl,*)              echo $flag                      ;;
2983             -f*|-W*)                                            ;;
2984             *)                  echo $flag                      ;;
2985         esac
2986    done
2987 }
2988
2989 cparser_flags(){
2990     for flag; do
2991         case $flag in
2992             -Wno-switch)             echo -Wno-switch-enum ;;
2993             -Wno-format-zero-length) ;;
2994             -Wdisabled-optimization) ;;
2995             -Wno-pointer-sign)       echo -Wno-other ;;
2996             *)                       echo $flag ;;
2997         esac
2998     done
2999 }
3000
3001 msvc_common_flags(){
3002     for flag; do
3003         case $flag in
3004             # In addition to specifying certain flags under the compiler
3005             # specific filters, they must be specified here as well or else the
3006             # generic catch all at the bottom will print the original flag.
3007             -Wall)                ;;
3008             -std=c99)             ;;
3009             # Common flags
3010             -fomit-frame-pointer) ;;
3011             -g)                   echo -Z7 ;;
3012             -fno-math-errno)      ;;
3013             -fno-common)          ;;
3014             -fno-signed-zeros)    ;;
3015             -fPIC)                ;;
3016             -mthumb)              ;;
3017             -march=*)             ;;
3018             -lz)                  echo zlib.lib ;;
3019             -lavifil32)           echo vfw32.lib ;;
3020             -lavicap32)           echo vfw32.lib user32.lib ;;
3021             -lx264)               echo libx264.lib ;;
3022             -l*)                  echo ${flag#-l}.lib ;;
3023             -L*)                  echo -libpath:${flag#-L} ;;
3024             *)                    echo $flag ;;
3025         esac
3026     done
3027 }
3028
3029 msvc_flags(){
3030     msvc_common_flags "$@"
3031     for flag; do
3032         case $flag in
3033             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3034                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3035                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3036                                        -wd4273 -wd4554 -wd4701 ;;
3037         esac
3038     done
3039 }
3040
3041 icl_flags(){
3042     msvc_common_flags "$@"
3043     for flag; do
3044         case $flag in
3045             # Despite what Intel's documentation says -Wall, which is supported
3046             # on Windows, does enable remarks so disable them here.
3047             -Wall)                echo $flag -Qdiag-disable:remark ;;
3048             -std=c99)             echo -Qstd=c99 ;;
3049         esac
3050     done
3051 }
3052
3053 pgi_flags(){
3054     for flag; do
3055         case $flag in
3056             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3057             -fomit-frame-pointer) echo -Mnoframe ;;
3058             -g)                   echo -gopt ;;
3059             *)                    echo $flag ;;
3060         esac
3061     done
3062 }
3063
3064 suncc_flags(){
3065     for flag; do
3066         case $flag in
3067             -march=*|-mcpu=*)
3068                 case "${flag#*=}" in
3069                     native)                   echo -xtarget=native       ;;
3070                     v9|niagara)               echo -xarch=sparc          ;;
3071                     ultrasparc)               echo -xarch=sparcvis       ;;
3072                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3073                     i586|pentium)             echo -xchip=pentium        ;;
3074                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3075                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3076                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3077                     pentium4*)          echo -xtarget=pentium4           ;;
3078                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3079                     *-sse3)             echo -xarch=sse3                 ;;
3080                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3081                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3082                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3083                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3084                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3085                     k8|opteron|athlon64|athlon-fx)
3086                                                echo -xarch=sse2a         ;;
3087                     athlon*)                   echo -xarch=pentium_proa  ;;
3088                 esac
3089                 ;;
3090             -std=c99)             echo -xc99              ;;
3091             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3092             -fPIC)                echo -KPIC -xcode=pic32 ;;
3093             -W*,*)                echo $flag              ;;
3094             -f*-*|-W*|-mimpure-text)                      ;;
3095             -shared)              echo -G                 ;;
3096             *)                    echo $flag              ;;
3097         esac
3098     done
3099 }
3100
3101 tms470_flags(){
3102     for flag; do
3103         case $flag in
3104             -march=*|-mcpu=*)
3105                 case "${flag#*=}" in
3106                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3107                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3108                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3109                     armv6*|arm11*)          echo -mv=6   ;;
3110                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3111                                             echo -mv=5e  ;;
3112                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3113                 esac
3114                 ;;
3115             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3116             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3117             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3118             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3119             -msoft-float)   echo --float_support=vfplib       ;;
3120             -O[0-3]|-mf=*)  echo $flag                        ;;
3121             -g)             echo -g -mn                       ;;
3122             -pds=*)         echo $flag                        ;;
3123             -D*|-I*)        echo $flag                        ;;
3124             --gcc|--abi=*)  echo $flag                        ;;
3125             -me)            echo $flag                        ;;
3126         esac
3127     done
3128 }
3129
3130 probe_cc(){
3131     pfx=$1
3132     _cc=$2
3133
3134     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3135     unset _ld_o _ldflags _ld_lib _ld_path
3136     unset _depflags _DEPCMD _DEPFLAGS
3137     _flags_filter=echo
3138
3139     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3140         _type=llvm_gcc
3141         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3142         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3143         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3144         _cflags_speed='-O3'
3145         _cflags_size='-Os'
3146     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3147         _type=gcc
3148         gcc_version=$($_cc --version | head -n1)
3149         gcc_basever=$($_cc -dumpversion)
3150         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3151         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3152         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3153         if ! $_cc -dumpversion | grep -q '^2\.'; then
3154             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3155         fi
3156         _cflags_speed='-O3'
3157         _cflags_size='-Os'
3158     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3159         _type=icc
3160         _ident=$($_cc --version | head -n1)
3161         _depflags='-MMD'
3162         _cflags_speed='-O3'
3163         _cflags_size='-Os'
3164         _cflags_noopt='-O1'
3165     elif $_cc -v 2>&1 | grep -q xlc; then
3166         _type=xlc
3167         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3168         _cflags_speed='-O5'
3169         _cflags_size='-O5 -qcompact'
3170     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3171         _type=ccc
3172         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3173         _DEPFLAGS='-M'
3174         _cflags_speed='-fast'
3175         _cflags_size='-O1'
3176         _flags_filter=ccc_flags
3177     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3178         test -d "$sysroot" || die "No valid sysroot specified."
3179         _type=armcc
3180         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3181         armcc_conf="$PWD/armcc.conf"
3182         $_cc --arm_linux_configure                 \
3183              --arm_linux_config_file="$armcc_conf" \
3184              --configure_sysroot="$sysroot"        \
3185              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3186              die "Error creating armcc configuration file."
3187         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3188         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3189         as_default="${cross_prefix}gcc"
3190         _depflags='-MMD'
3191         _cflags_speed='-O3'
3192         _cflags_size='-Os'
3193     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3194         _type=tms470
3195         _ident=$($_cc -version | head -n1 | tr -s ' ')
3196         _flags='--gcc --abi=eabi -me'
3197         _cc_e='-ppl -fe=$@'
3198         _cc_o='-fe=$@'
3199         _depflags='-ppa -ppd=$(@:.o=.d)'
3200         _cflags_speed='-O3 -mf=5'
3201         _cflags_size='-O3 -mf=2'
3202         _flags_filter=tms470_flags
3203     elif $_cc -v 2>&1 | grep -q clang; then
3204         _type=clang
3205         _ident=$($_cc --version 2>/dev/null | head -n1)
3206         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3207         _cflags_speed='-O3'
3208         _cflags_size='-Os'
3209     elif $_cc -V 2>&1 | grep -q Sun; then
3210         _type=suncc
3211         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3212         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3213         _DEPFLAGS='-xM1 -xc99'
3214         _ldflags='-std=c99'
3215         _cflags_speed='-O5'
3216         _cflags_size='-O5 -xspace'
3217         _flags_filter=suncc_flags
3218     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3219         _type=pathscale
3220         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3221         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3222         _cflags_speed='-O2'
3223         _cflags_size='-Os'
3224         _flags_filter='filter_out -Wdisabled-optimization'
3225     elif $_cc -v 2>&1 | grep -q Open64; then
3226         _type=open64
3227         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3228         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3229         _cflags_speed='-O2'
3230         _cflags_size='-Os'
3231         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3232     elif $_cc -V 2>&1 | grep -q Portland; then
3233         _type=pgi
3234         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3235         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3236         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3237         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3238         _cflags_noopt="-O1"
3239         _flags_filter=pgi_flags
3240     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3241         _type=armasm
3242         _ident=$($_cc | head -n1)
3243         # 4509: "This form of conditional instruction is deprecated"
3244         _flags="-nologo -ignore 4509"
3245         _flags_filter=armasm_flags
3246     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3247         _type=msvc
3248         _ident=$($_cc 2>&1 | head -n1)
3249         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3250         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3251         _cflags_speed="-O2"
3252         _cflags_size="-O1"
3253         if $_cc -nologo- 2>&1 | grep -q Linker; then
3254             _ld_o='-out:$@'
3255         else
3256             _ld_o='-Fe$@'
3257         fi
3258         _cc_o='-Fo$@'
3259         _cc_e='-P -Fi$@'
3260         _flags_filter=msvc_flags
3261         _ld_lib='lib%.a'
3262         _ld_path='-libpath:'
3263         _flags='-nologo'
3264     elif $_cc 2>&1 | grep -q Intel; then
3265         _type=icl
3266         _ident=$($_cc 2>&1 | head -n1)
3267         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3268         # Not only is O3 broken on 13.x+ but it is slower on all previous
3269         # versions (tested) as well.
3270         _cflags_speed="-O2"
3271         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3272         if $_cc 2>&1 | grep -q Linker; then
3273             _ld_o='-out:$@'
3274         else
3275             _ld_o='-Fe$@'
3276         fi
3277         _cc_o='-Fo$@'
3278         _cc_e='-P'
3279         _flags_filter=icl_flags
3280         _ld_lib='lib%.a'
3281         _ld_path='-libpath:'
3282         # -Qdiag-error to make icl error when seeing certain unknown arguments
3283         _flags='-nologo -Qdiag-error:4044,10157'
3284         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3285         # with MSVC which enables it by default.
3286         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3287     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3288         # lld can emulate multiple different linkers; in ms link.exe mode,
3289         # the -? parameter gives the help output which contains an identifyable
3290         # string, while it gives an error in other modes.
3291         _type=lld-link
3292         # The link.exe mode doesn't have a switch for getting the version,
3293         # but we can force it back to gnu mode and get the version from there.
3294         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3295         _ld_o='-out:$@'
3296         _flags_filter=msvc_flags
3297         _ld_lib='lib%.a'
3298         _ld_path='-libpath:'
3299     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3300         _type=cparser
3301         _ident=$($_cc --version | head -n1)
3302         _depflags='-MMD'
3303         _cflags_speed='-O4'
3304         _cflags_size='-O2'
3305         _flags_filter=cparser_flags
3306     fi
3307
3308     eval ${pfx}_type=\$_type
3309     eval ${pfx}_ident=\$_ident
3310 }
3311
3312 set_ccvars(){
3313     eval ${1}_C=\${_cc_c-\${${1}_C}}
3314     eval ${1}_E=\${_cc_e-\${${1}_E}}
3315     eval ${1}_O=\${_cc_o-\${${1}_O}}
3316
3317     if [ -n "$_depflags" ]; then
3318         eval ${1}_DEPFLAGS=\$_depflags
3319     else
3320         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3321         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3322         eval DEP${1}FLAGS=\$_flags
3323     fi
3324 }
3325
3326 probe_cc cc "$cc"
3327 cflags_filter=$_flags_filter
3328 cflags_speed=$_cflags_speed
3329 cflags_size=$_cflags_size
3330 cflags_noopt=$_cflags_noopt
3331 add_cflags $_flags $_cflags
3332 cc_ldflags=$_ldflags
3333 set_ccvars CC
3334
3335 probe_cc hostcc "$host_cc"
3336 host_cflags_filter=$_flags_filter
3337 add_host_cflags  $_flags $_cflags
3338 set_ccvars HOSTCC
3339
3340 test -n "$cc_type" && enable $cc_type ||
3341     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3342
3343 : ${as_default:=$cc}
3344 : ${objcc_default:=$cc}
3345 : ${dep_cc_default:=$cc}
3346 : ${ld_default:=$cc}
3347 : ${host_ld_default:=$host_cc}
3348 set_default ar as objcc dep_cc ld host_ld
3349
3350 probe_cc as "$as"
3351 asflags_filter=$_flags_filter
3352 add_asflags $_flags $_cflags
3353 set_ccvars AS
3354
3355 probe_cc objcc "$objcc"
3356 objcflags_filter=$_flags_filter
3357 add_objcflags $_flags $_cflags
3358 set_ccvars OBJC
3359
3360 probe_cc ld "$ld"
3361 ldflags_filter=$_flags_filter
3362 add_ldflags $_flags $_ldflags
3363 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3364 LD_O=${_ld_o-$LD_O}
3365 LD_LIB=${_ld_lib-$LD_LIB}
3366 LD_PATH=${_ld_path-$LD_PATH}
3367
3368 probe_cc hostld "$host_ld"
3369 host_ldflags_filter=$_flags_filter
3370 add_host_ldflags $_flags $_ldflags
3371 HOSTLD_O=${_ld_o-$HOSTLD_O}
3372
3373 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3374     probe_cc depcc "$dep_cc"
3375     CCDEP=${_DEPCMD:-$DEPCMD}
3376     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3377     DEPCCFLAGS=$_flags
3378 fi
3379
3380 if $ar 2>&1 | grep -q Microsoft; then
3381     arflags="-nologo"
3382     ar_o='-out:$@'
3383 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3384     arflags="rq"
3385     ar_o='$@'
3386 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3387     arflags='-Xany -r -c'
3388     ar_o='$@'
3389 else
3390     arflags="rc"
3391     ar_o='$@'
3392 fi
3393
3394 add_cflags $extra_cflags
3395 add_objcflags $extra_objcflags
3396 add_asflags $extra_cflags
3397
3398 if test -n "$sysroot"; then
3399     case "$cc_type" in
3400         gcc|llvm_gcc|clang)
3401             add_cppflags --sysroot="$sysroot"
3402             add_ldflags --sysroot="$sysroot"
3403         ;;
3404         tms470)
3405             add_cppflags -I"$sysinclude"
3406             add_ldflags  --sysroot="$sysroot"
3407         ;;
3408     esac
3409 fi
3410
3411 if test "$cpu" = host; then
3412     enabled cross_compile &&
3413         die "--cpu=host makes no sense when cross-compiling."
3414
3415     case "$cc_type" in
3416         gcc|llvm_gcc)
3417             check_native(){
3418                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3419                 sed -n "/cc1.*$1=/{
3420                             s/.*$1=\\([^ ]*\\).*/\\1/
3421                             p
3422                             q
3423                         }" $TMPE
3424             }
3425             cpu=$(check_native -march || check_native -mcpu)
3426         ;;
3427     esac
3428
3429     test "${cpu:-host}" = host &&
3430         die "--cpu=host not supported with compiler $cc"
3431 fi
3432
3433 # Deal with common $arch aliases
3434 case "$arch" in
3435     aarch64|arm64)
3436         arch="aarch64"
3437     ;;
3438     arm*)
3439         arch="arm"
3440     ;;
3441     mips*|IP*)
3442         case "$arch" in
3443         *el)
3444             add_cppflags -EL
3445             add_ldflags -EL
3446         ;;
3447         *eb)
3448             add_cppflags -EB
3449             add_ldflags -EB
3450         ;;
3451         esac
3452         arch="mips"
3453     ;;
3454     parisc*|hppa*)
3455         arch="parisc"
3456     ;;
3457     "Power Macintosh"|ppc*|powerpc*)
3458         arch="ppc"
3459     ;;
3460     s390|s390x)
3461         arch="s390"
3462     ;;
3463     sh4|sh)
3464         arch="sh4"
3465     ;;
3466     sun4u|sparc*)
3467         arch="sparc"
3468     ;;
3469     tilegx|tile-gx)
3470         arch="tilegx"
3471     ;;
3472     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3473         arch="x86"
3474     ;;
3475 esac
3476
3477 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3478 enable $arch
3479
3480 # Add processor-specific flags
3481 if enabled aarch64; then
3482
3483     case $cpu in
3484         armv*)
3485             cpuflags="-march=$cpu"
3486         ;;
3487         *)
3488             cpuflags="-mcpu=$cpu"
3489         ;;
3490     esac
3491
3492 elif enabled alpha; then
3493
3494     cpuflags="-mcpu=$cpu"
3495
3496 elif enabled arm; then
3497
3498     check_arm_arch() {
3499         check_cpp_condition stddef.h \
3500             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3501             $cpuflags
3502     }
3503
3504     probe_arm_arch() {
3505         if   check_arm_arch 4;        then echo armv4
3506         elif check_arm_arch 4T;       then echo armv4t
3507         elif check_arm_arch 5;        then echo armv5
3508         elif check_arm_arch 5E;       then echo armv5e
3509         elif check_arm_arch 5T;       then echo armv5t
3510         elif check_arm_arch 5TE;      then echo armv5te
3511         elif check_arm_arch 5TEJ;     then echo armv5te
3512         elif check_arm_arch 6;        then echo armv6
3513         elif check_arm_arch 6J;       then echo armv6j
3514         elif check_arm_arch 6K;       then echo armv6k
3515         elif check_arm_arch 6Z;       then echo armv6z
3516         elif check_arm_arch 6ZK;      then echo armv6zk
3517         elif check_arm_arch 6T2;      then echo armv6t2
3518         elif check_arm_arch 7;        then echo armv7
3519         elif check_arm_arch 7A  7_A;  then echo armv7-a
3520         elif check_arm_arch 7S;       then echo armv7-a
3521         elif check_arm_arch 7R  7_R;  then echo armv7-r
3522         elif check_arm_arch 7M  7_M;  then echo armv7-m
3523         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3524         elif check_arm_arch 8A  8_A;  then echo armv8-a
3525         fi
3526     }
3527
3528     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3529
3530     case $cpu in
3531         armv*)
3532             cpuflags="-march=$cpu"
3533             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3534         ;;
3535         *)
3536             cpuflags="-mcpu=$cpu"
3537             case $cpu in
3538                 cortex-a*)                               subarch=armv7a  ;;
3539                 cortex-r*)                               subarch=armv7r  ;;
3540                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3541                 arm11*)                                  subarch=armv6   ;;
3542                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3543                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3544                 *)                             subarch=$(probe_arm_arch) ;;
3545             esac
3546         ;;
3547     esac
3548
3549     case "$subarch" in
3550         armv5t*)    enable fast_clz                ;;
3551         armv[6-8]*) enable fast_clz fast_unaligned ;;
3552     esac
3553
3554 elif enabled avr32; then
3555
3556     case $cpu in
3557         ap7[02]0[0-2])
3558             subarch="avr32_ap"
3559             cpuflags="-mpart=$cpu"
3560         ;;
3561         ap)
3562             subarch="avr32_ap"
3563             cpuflags="-march=$cpu"
3564         ;;
3565         uc3[ab]*)
3566             subarch="avr32_uc"
3567             cpuflags="-mcpu=$cpu"
3568         ;;
3569         uc)
3570             subarch="avr32_uc"
3571             cpuflags="-march=$cpu"
3572         ;;
3573     esac
3574
3575 elif enabled bfin; then
3576
3577     cpuflags="-mcpu=$cpu"
3578
3579 elif enabled mips; then
3580
3581     cpuflags="-march=$cpu"
3582
3583 elif enabled ppc; then
3584
3585     disable ldbrx
3586
3587     case $(tolower $cpu) in
3588         601|ppc601|powerpc601)
3589             cpuflags="-mcpu=601"
3590             disable altivec
3591         ;;
3592         603*|ppc603*|powerpc603*)
3593             cpuflags="-mcpu=603"
3594             disable altivec
3595         ;;
3596         604*|ppc604*|powerpc604*)
3597             cpuflags="-mcpu=604"
3598             disable altivec
3599         ;;
3600         g3|75*|ppc75*|powerpc75*)
3601             cpuflags="-mcpu=750"
3602             disable altivec
3603         ;;
3604         g4|745*|ppc745*|powerpc745*)
3605             cpuflags="-mcpu=7450"
3606             disable vsx
3607         ;;
3608         74*|ppc74*|powerpc74*)
3609             cpuflags="-mcpu=7400"
3610             disable vsx
3611         ;;
3612         g5|970|ppc970|powerpc970)
3613             cpuflags="-mcpu=970"
3614             disable vsx
3615         ;;
3616         power[3-6]*)
3617             cpuflags="-mcpu=$cpu"
3618             disable vsx
3619         ;;
3620         power[7-8]*)
3621             cpuflags="-mcpu=$cpu"
3622             enable ldbrx
3623         ;;
3624         cell)
3625             cpuflags="-mcpu=cell"
3626             enable ldbrx
3627             disable vsx
3628         ;;
3629         e500mc)
3630             cpuflags="-mcpu=e500mc"
3631             disable altivec
3632         ;;
3633         e500v2)
3634             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3635             disable altivec
3636             disable dcbzl
3637         ;;
3638         e500)
3639             cpuflags="-mcpu=8540 -mhard-float"
3640             disable altivec
3641             disable dcbzl
3642         ;;
3643     esac
3644
3645 elif enabled sparc; then
3646
3647     case $cpu in
3648         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3649             cpuflags="-mcpu=$cpu"
3650         ;;
3651         ultrasparc*|niagara[234])
3652             cpuflags="-mcpu=$cpu"
3653         ;;
3654     esac
3655
3656 elif enabled x86; then
3657
3658     case $cpu in
3659         i[345]86|pentium)
3660             cpuflags="-march=$cpu"
3661             disable i686
3662             disable mmx
3663         ;;
3664         # targets that do NOT support nopl and conditional mov (cmov)
3665         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3666             cpuflags="-march=$cpu"
3667             disable i686
3668         ;;
3669         # targets that do support nopl and conditional mov (cmov)
3670         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3671             cpuflags="-march=$cpu"
3672             enable i686
3673             enable fast_cmov
3674         ;;
3675         # targets that do support conditional mov but on which it's slow
3676         pentium4|pentium4m|prescott|nocona)
3677             cpuflags="-march=$cpu"
3678             enable i686
3679             disable fast_cmov
3680         ;;
3681     esac
3682
3683 fi
3684
3685 if [ "$cpu" != generic ]; then
3686     add_cflags  $cpuflags
3687     add_asflags $cpuflags
3688     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3689 fi
3690
3691 # compiler sanity check
3692 check_exec <<EOF
3693 int main(void){ return 0; }
3694 EOF
3695 if test "$?" != 0; then
3696     echo "$cc is unable to create an executable file."
3697     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3698         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3699         echo "Only do this if you know what cross compiling means."
3700     fi
3701     die "C compiler test failed."
3702 fi
3703
3704 add_cppflags -D_ISOC99_SOURCE
3705
3706 # some compilers silently accept -std=c11, so we also need to check that the
3707 # version macro is defined properly
3708 if test_cflags_cpp -std=c11 "__STDC_VERSION__ >= 201112L"; then
3709     add_cflags -std=c11
3710 else
3711     check_cflags -std=c99
3712 fi
3713
3714 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3715 #include <stdlib.h>
3716 EOF
3717 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3718 #include <stdlib.h>
3719 EOF
3720
3721 add_host_cppflags -D_ISOC99_SOURCE
3722 check_host_cflags -std=c99
3723 check_host_cflags -Wall
3724 check_host_cflags -O3
3725
3726 check_64bit(){
3727     arch32=$1
3728     arch64=$2
3729     expr=$3
3730     check_code cc "" "int test[2*($expr) - 1]" &&
3731         subarch=$arch64 || subarch=$arch32
3732 }
3733
3734 case "$arch" in
3735     aarch64|alpha|ia64)
3736         spic=$shared
3737     ;;
3738     mips)
3739         check_64bit mips mips64 '_MIPS_SIM > 1'
3740         spic=$shared
3741     ;;
3742     parisc)
3743         check_64bit parisc parisc64 'sizeof(void *) > 4'
3744         spic=$shared
3745     ;;
3746     ppc)
3747         check_64bit ppc ppc64 'sizeof(void *) > 4'
3748         spic=$shared
3749     ;;
3750     s390)
3751         check_64bit s390 s390x 'sizeof(void *) > 4'
3752         spic=$shared
3753     ;;
3754     sparc)
3755         check_64bit sparc sparc64 'sizeof(void *) > 4'
3756         spic=$shared
3757     ;;
3758     x86)
3759         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3760         if test "$subarch" = "x86_64"; then
3761             spic=$shared
3762         fi
3763     ;;
3764 esac
3765
3766 enable $subarch
3767 enabled spic && enable_weak pic
3768
3769 # OS specific
3770 case $target_os in
3771     aix)
3772         SHFLAGS=-shared
3773         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3774         enabled shared && add_ldflags -Wl,-brtl
3775         ;;
3776     android)
3777         disable symver
3778         enable section_data_rel_ro
3779         SLIB_INSTALL_NAME='$(SLIBNAME)'
3780         SLIB_INSTALL_LINKS=
3781         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3782         ;;
3783     haiku)
3784         prefix_default="/boot/common"
3785         network_extralibs="-lnetwork"
3786         host_libs=
3787         ;;
3788     sunos)
3789         SHFLAGS='-shared -Wl,-h,$$(@F)'
3790         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3791         network_extralibs="-lsocket -lnsl"
3792         # When using suncc to build, the Solaris linker will mark
3793         # an executable with each instruction set encountered by
3794         # the Solaris assembler.  As our libraries contain their own
3795         # guards for processor-specific code, instead suppress
3796         # generation of the HWCAPS ELF section on Solaris x86 only.
3797         enabled_all suncc x86 &&
3798             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3799             add_ldflags -Wl,-M,mapfile
3800         nm_default='nm -P -g'
3801         version_script='-M'
3802         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3803         ;;
3804     netbsd)
3805         disable symver
3806         oss_indev_extralibs="-lossaudio"
3807         oss_outdev_extralibs="-lossaudio"
3808         ;;
3809     openbsd|bitrig)
3810         disable symver
3811         SHFLAGS='-shared'
3812         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3813         SLIB_INSTALL_LINKS=
3814         oss_indev_extralibs="-lossaudio"
3815         oss_outdev_extralibs="-lossaudio"
3816         ;;
3817     dragonfly)
3818         disable symver
3819         ;;
3820     freebsd)
3821         ;;
3822     bsd/os)
3823         add_extralibs -lpoll -lgnugetopt
3824         ;;
3825     darwin)
3826         enabled ppc && add_asflags -force_cpusubtype_ALL
3827         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3828         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3829         add_ldflags -Wl,-dynamic,-search_paths_first
3830         SLIBSUF=".dylib"
3831         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3832         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3833         objformat="macho"
3834         enabled x86_64 && objformat="macho64"
3835         enabled_any pic shared ||
3836             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3837         check_header dispatch/dispatch.h &&
3838             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3839         ;;
3840     msys*)
3841         die "Native MSYS builds are discouraged, please use the MINGW environment."
3842         ;;
3843     mingw32*|mingw64*)
3844         if test $target_os = "mingw32ce"; then
3845             disable network
3846         else
3847             target_os=mingw32
3848         fi
3849         LIBTARGET=i386
3850         if enabled x86_64; then
3851             LIBTARGET="i386:x86-64"
3852         elif enabled arm; then
3853             LIBTARGET=arm-wince
3854         fi
3855         check_ldflags -Wl,--nxcompat
3856         check_ldflags -Wl,--dynamicbase
3857         shlibdir_default="$bindir_default"
3858         SLIBPREF=""
3859         SLIBSUF=".dll"
3860         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3861         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3862         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3863         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3864         SLIB_INSTALL_LINKS=
3865         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3866         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3867         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3868         objformat="win32"
3869         dlltool="${cross_prefix}dlltool"
3870         ranlib=:
3871         enable dos_paths
3872         ;;
3873     win32|win64)
3874         disable symver
3875         if enabled shared; then
3876             # Link to the import library instead of the normal static library
3877             # for shared libs.
3878             LD_LIB='%.lib'
3879             # Cannot build both shared and static libs with MSVC or icl.
3880             disable static
3881         fi
3882         shlibdir_default="$bindir_default"
3883         SLIBPREF=""
3884         SLIBSUF=".dll"
3885         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3886         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3887         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3888         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3889         SLIB_INSTALL_LINKS=
3890         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3891         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3892         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3893         objformat="win32"
3894         ranlib=:
3895         enable dos_paths
3896         ;;
3897     cygwin*)
3898         target_os=cygwin
3899         shlibdir_default="$bindir_default"
3900         SLIBPREF="cyg"
3901         SLIBSUF=".dll"
3902         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3903         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3904         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3905         SLIB_INSTALL_LINKS=
3906         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3907         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3908         objformat="win32"
3909         enable dos_paths
3910         ;;
3911     *-dos|freedos|opendos)
3912         network_extralibs="-lsocket"
3913         objformat="coff"
3914         enable dos_paths
3915         add_cppflags -U__STRICT_ANSI__
3916         ;;
3917     linux)
3918         enable dv1394
3919         enable section_data_rel_ro
3920         ;;
3921     irix*)
3922         target_os=irix
3923         ranlib="echo ignoring ranlib"
3924         ;;
3925     os/2*)
3926         ln_s="cp -f"
3927         objformat="aout"
3928         add_cppflags -D_GNU_SOURCE
3929         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3930         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3931         LIBSUF="_s.a"
3932         SLIBPREF=""
3933         SLIBSUF=".dll"
3934         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3935         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3936         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3937             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3938             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3939             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3940             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3941         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3942             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3943         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3944         enable dos_paths
3945         ;;
3946     gnu/kfreebsd)
3947         add_cppflags -D_BSD_SOURCE
3948         ;;
3949     gnu)
3950         ;;
3951     qnx)
3952         add_cppflags -D_QNX_SOURCE
3953         network_extralibs="-lsocket"
3954         ;;
3955     symbian)
3956         SLIBSUF=".dll"
3957         enable dos_paths
3958         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3959         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3960         add_ldflags -Wl,--target1-abs,--no-undefined \
3961                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3962                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3963         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3964                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3965                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3966         ;;
3967     osf1)
3968         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3969         ;;
3970     minix)
3971         ;;
3972     plan9)
3973         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3974                      -D_REENTRANT_SOURCE        \
3975                      -D_RESEARCH_SOURCE         \
3976                      -DFD_SETSIZE=96            \
3977                      -DHAVE_SOCK_OPTS
3978         add_compat strtod.o strtod=avpriv_strtod
3979         network_extralibs='-lbsd'
3980         exeobjs=compat/plan9/main.o
3981         cp_f='cp'
3982         ;;
3983     none)
3984         ;;
3985     *)
3986         die "Unknown OS '$target_os'."
3987         ;;
3988 esac
3989
3990 # determine libc flavour
3991
3992 probe_libc(){
3993     pfx=$1
3994     pfx_no_=${pfx%_}
3995     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3996     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3997         eval ${pfx}libc_type=uclibc
3998         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3999     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4000         eval ${pfx}libc_type=glibc
4001         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4002     # MinGW headers can be installed on Cygwin, so check for newlib first.
4003     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4004         eval ${pfx}libc_type=newlib
4005         add_${pfx}cppflags -U__STRICT_ANSI__
4006     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4007     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4008         eval ${pfx}libc_type=mingw64
4009         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4010         eval test \$${pfx_no_}cc_type = "gcc" &&
4011             add_${pfx}cppflags -D__printf__=__gnu_printf__
4012     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4013          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4014         eval ${pfx}libc_type=mingw32
4015         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4016             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4017             die "ERROR: MinGW32 runtime version must be >= 3.15."
4018         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4019         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4020             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4021         eval test \$${pfx_no_}cc_type = "gcc" &&
4022             add_${pfx}cppflags -D__printf__=__gnu_printf__
4023     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4024         eval ${pfx}libc_type=msvcrt
4025         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4026             if [ "$pfx" = host_ ]; then
4027                 add_host_cppflags -Dsnprintf=_snprintf
4028             else
4029                 add_compat strtod.o strtod=avpriv_strtod
4030                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4031                                              _snprintf=avpriv_snprintf  \
4032                                              vsnprintf=avpriv_vsnprintf
4033             fi
4034         fi
4035         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4036         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4037         # 0x601 by default unless something else is set by the user.
4038         # This can easily lead to us detecting functions only present
4039         # in such new versions and producing binaries requiring windows 7.0.
4040         # Therefore explicitly set the default to XP unless the user has
4041         # set something else on the command line.
4042         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4043         # family. For these cases, configure is free to use any functions
4044         # found in the SDK headers by default. (Alternatively, we could force
4045         # _WIN32_WINNT to 0x0602 in that case.)
4046         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4047             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4048 #ifdef WINAPI_FAMILY
4049 #include <winapifamily.h>
4050 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4051 #error not desktop
4052 #endif
4053 #endif
4054 EOF
4055         if [ "$pfx" = "" ]; then
4056             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4057         fi
4058     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4059         eval ${pfx}libc_type=klibc
4060     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4061         eval ${pfx}libc_type=bionic
4062     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4063         eval ${pfx}libc_type=solaris
4064         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4065     else
4066         eval ${pfx}libc_type=default
4067         add_${pfx}cppflags -D_DEFAULT_SOURCE
4068     fi
4069 }
4070
4071 probe_libc
4072 test -n "$libc_type" && enable libc_$libc_type
4073 probe_libc host_
4074 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4075
4076 case $libc_type in
4077     bionic)
4078         add_compat strtod.o strtod=avpriv_strtod
4079         ;;
4080 esac
4081
4082 # hacks for compiler/libc/os combinations
4083
4084 if enabled_all tms470 libc_glibc; then
4085     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4086     add_cppflags -D__USER_LABEL_PREFIX__=
4087     add_cppflags -D__builtin_memset=memset
4088     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4089     add_cflags   -pds=48    # incompatible redefinition of macro
4090 fi
4091
4092 if enabled_all ccc libc_glibc; then
4093     add_ldflags -Wl,-z,now  # calls to libots crash without this
4094 fi
4095
4096 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4097     add_cppflags '-I\$(SRC_PATH)/compat/float'
4098
4099 esc(){
4100     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4101 }
4102
4103 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4104
4105 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4106
4107 set_default $PATHS_LIST
4108 set_default nm
4109
4110 # we need to build at least one lib type
4111 if ! enabled_any static shared; then
4112     cat <<EOF
4113 At least one library type must be built.
4114 Specify --enable-static to build the static libraries or --enable-shared to
4115 build the shared libraries as well. To only build the shared libraries specify
4116 --disable-static in addition to --enable-shared.
4117 EOF
4118     exit 1
4119 fi
4120
4121 die_license_disabled() {
4122     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
4123 }
4124
4125 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
4126 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
4127 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
4128
4129 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4130
4131 disabled optimizations || check_cflags -fomit-frame-pointer
4132
4133 enable_weak_pic() {
4134     disabled pic && return
4135     enable pic
4136     add_cppflags -DPIC
4137     case "$target_os" in
4138     mingw*|cygwin*)
4139         ;;
4140     *)
4141         add_cflags -fPIC
4142         ;;
4143     esac
4144     add_asflags  -fPIC
4145 }
4146
4147 enabled pic && enable_weak_pic
4148
4149 check_cc <<EOF || die "Symbol mangling check failed."
4150 int ff_extern;
4151 EOF
4152 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4153 extern_prefix=${sym%%ff_extern*}
4154
4155 check_cc <<EOF && enable_weak inline_asm
4156 void foo(void) { __asm__ volatile ("" ::); }
4157 EOF
4158
4159 _restrict=
4160 for restrict_keyword in restrict __restrict__ __restrict; do
4161     check_cc <<EOF && _restrict=$restrict_keyword && break
4162 void foo(char * $restrict_keyword p);
4163 EOF
4164 done
4165
4166 check_cc <<EOF && enable pragma_deprecated
4167 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4168 EOF
4169
4170 check_cc <<EOF && enable attribute_packed
4171 struct { int x; } __attribute__((packed)) x;
4172 EOF
4173
4174 check_cc <<EOF && enable attribute_may_alias
4175 union { int x; } __attribute__((may_alias)) x;
4176 EOF
4177
4178 check_cc <<EOF || die "endian test failed"
4179 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4180 EOF
4181 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4182
4183 check_gas() {
4184     log "check_gas using '$as' as AS"
4185     # :vararg is used on aarch64, arm and ppc altivec
4186     check_as <<EOF || return 1
4187 .macro m n, y:vararg=0
4188 \n: .int \y
4189 .endm
4190 m x
4191 EOF
4192     # .altmacro is only used in arm asm
4193     ! enabled arm || check_as <<EOF || return 1
4194 .altmacro
4195 EOF
4196     enable gnu_as
4197     return 0
4198 }
4199
4200 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4201     nogas=:
4202     enabled_any arm aarch64 && nogas=die
4203     enabled_all ppc altivec && nogas=warn
4204     as_noop=-v
4205
4206     case $as_type in
4207         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4208         gcc)  gaspp_as_type=gas ;;
4209         *)    gaspp_as_type=$as_type ;;
4210     esac
4211
4212     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4213
4214     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4215         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4216
4217     if ! check_gas ; then
4218         as=${gas:=$as}
4219         check_gas || \
4220             $nogas "GNU assembler not found, install/update gas-preprocessor"
4221     fi
4222
4223     check_as <<EOF && enable as_func
4224 .func test
4225 .endfunc
4226 EOF
4227 fi
4228
4229 check_inline_asm inline_asm_labels '"1:\n"'
4230
4231 if enabled aarch64; then
4232     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4233     # internal assembler in clang 3.3 does not support this instruction
4234     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4235     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4236
4237     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4238
4239 elif enabled alpha; then
4240
4241     check_cflags -mieee
4242
4243 elif enabled arm; then
4244
4245     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4246     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4247     enabled thumb && check_cflags -mthumb || check_cflags -marm
4248
4249     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4250         enable vfp_args
4251     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4252         enable vfp_args
4253     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4254         case "${cross_prefix:-$cc}" in
4255             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4256             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4257 __asm__ (".eabi_attribute 28, 1");
4258 int main(void) { return 0; }
4259 EOF
4260         esac
4261         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4262     fi
4263
4264     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4265     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4266     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4267     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4268     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4269     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4270
4271     [ $target_os = linux ] || [ $target_os = android ] ||
4272         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4273             $ARCH_EXT_LIST_ARM
4274
4275     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4276
4277     check_as <<EOF && enable as_dn_directive
4278 ra .dn d0.i16
4279 .unreq ra
4280 EOF
4281     check_as <<EOF && enable as_fpu_directive
4282 .fpu neon
4283 EOF
4284
4285     # llvm's integrated assembler supports .object_arch from llvm 3.5
4286     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4287 .object_arch armv4
4288 EOF
4289
4290     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4291
4292 elif enabled mips; then
4293
4294     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4295
4296     # make sure that only an instruction set is enabled
4297     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4298
4299     if enabled mips64; then
4300         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4301             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4302                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4303     else
4304         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4305             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4306                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4307     fi
4308
4309 elif enabled parisc; then
4310
4311     if enabled gcc; then
4312         case $($cc -dumpversion) in
4313             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4314         esac
4315     fi
4316
4317 elif enabled ppc; then
4318
4319     enable local_aligned_8 local_aligned_16 local_aligned_32
4320
4321     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4322     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4323     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4324     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4325
4326     # AltiVec flags: The FSF version of GCC differs from the Apple version
4327     if enabled altivec; then
4328         check_cflags -maltivec -mabi=altivec &&
4329         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4330         check_cflags -faltivec
4331
4332         # check if our compiler supports Motorola AltiVec C API
4333         check_cc <<EOF || disable altivec
4334 $inc_altivec_h
4335 int main(void) {
4336     vector signed int v1 = (vector signed int) { 0 };
4337     vector signed int v2 = (vector signed int) { 1 };
4338     v1 = vec_add(v1, v2);
4339     return 0;
4340 }
4341 EOF
4342
4343         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4344     fi
4345
4346     if enabled vsx; then
4347         check_cflags -mvsx &&
4348         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4349     fi
4350
4351     if enabled power8; then
4352         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4353     fi
4354
4355 elif enabled x86; then
4356
4357     check_builtin rdtsc    intrin.h   "__rdtsc()"
4358     check_builtin mm_empty mmintrin.h "_mm_empty()"
4359
4360     enable local_aligned_8 local_aligned_16 local_aligned_32
4361
4362     # check whether EBP is available on x86
4363     # As 'i' is stored on the stack, this program will crash
4364     # if the base pointer is used to access it because the
4365     # base pointer is cleared in the inline assembly code.
4366     check_exec_crash <<EOF && enable ebp_available
4367 volatile int i=0;
4368 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4369 return i;
4370 EOF
4371
4372     # check whether EBX is available on x86
4373     check_inline_asm ebx_available '""::"b"(0)' &&
4374         check_inline_asm ebx_available '"":::"%ebx"'
4375
4376     # check whether xmm clobbers are supported
4377     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4378
4379     # check whether binutils is new enough to compile SSSE3/MMXEXT
4380     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4381     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4382
4383     if ! disabled_any asm mmx yasm; then
4384         if check_cmd $yasmexe --version; then
4385             enabled x86_64 && yasm_extra="-m amd64"
4386             yasm_debug="-g dwarf2"
4387         elif check_cmd nasm -v; then
4388             yasmexe=nasm
4389             yasm_debug="-g -F dwarf"
4390             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4391         fi
4392
4393         YASMFLAGS="-f $objformat $yasm_extra"
4394         enabled pic               && append YASMFLAGS "-DPIC"
4395         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4396         case "$objformat" in
4397             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4398         esac
4399
4400         check_yasm "movbe ecx, [5]" && enable yasm ||
4401             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4402         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4403         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4404         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4405         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4406         check_yasm "CPU amdnop" || disable cpunop
4407     fi
4408
4409     case "$cpu" in
4410         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4411             disable fast_clz
4412         ;;
4413     esac
4414
4415 fi
4416
4417 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4418
4419 check_ldflags -Wl,--as-needed
4420
4421 if check_func dlopen; then
4422     ldl=
4423 elif check_func dlopen -ldl; then
4424     ldl=-ldl
4425 fi
4426
4427 if ! disabled network; then
4428     check_func getaddrinfo $network_extralibs
4429     check_func inet_aton $network_extralibs
4430
4431     check_type netdb.h "struct addrinfo"
4432     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4433     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4434     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4435     check_type poll.h "struct pollfd"
4436     check_type netinet/sctp.h "struct sctp_event_subscribe"
4437     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4438     check_type netinet/in.h "struct sockaddr_in6"
4439     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4440     check_type "sys/types.h sys/socket.h" socklen_t
4441
4442     # Prefer arpa/inet.h over winsock2
4443     if check_header arpa/inet.h ; then
4444         check_func closesocket
4445     elif check_header winsock2.h ; then
4446         check_func_headers winsock2.h closesocket -lws2 &&
4447             network_extralibs="-lws2" ||
4448         { check_func_headers winsock2.h closesocket -lws2_32 &&
4449             network_extralibs="-lws2_32"; } || disable winsock2_h network
4450         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4451
4452         check_type ws2tcpip.h socklen_t
4453         check_type ws2tcpip.h "struct addrinfo"
4454         check_type ws2tcpip.h "struct group_source_req"
4455         check_type ws2tcpip.h "struct ip_mreq_source"
4456         check_type ws2tcpip.h "struct ipv6_mreq"
4457         check_type winsock2.h "struct pollfd"
4458         check_struct winsock2.h "struct sockaddr" sa_len
4459         check_type ws2tcpip.h "struct sockaddr_in6"
4460         check_type ws2tcpip.h "struct sockaddr_storage"
4461     else
4462         disable network
4463     fi
4464 fi
4465
4466 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4467 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4468 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4469 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4470
4471 case "$custom_allocator" in
4472     jemalloc)
4473         # jemalloc by default does not use a prefix
4474         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4475     ;;
4476     tcmalloc)
4477         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4478         malloc_prefix=tc_
4479     ;;
4480 esac
4481
4482 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4483 check_func  ${malloc_prefix}memalign            && enable memalign
4484 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4485
4486 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4487     check_func_headers time.h clock_gettime ||
4488         { check_lib time.h clock_gettime -lrt && LIBRT="-lrt"; }
4489
4490 check_func  fcntl
4491 check_func  fork
4492 check_func  gethrtime
4493 check_func  getopt
4494 check_func  getrusage
4495 check_func  gettimeofday
4496 check_func  gmtime_r
4497 check_func  isatty
4498 check_func  localtime_r
4499 check_func  mach_absolute_time
4500 check_func  mkstemp
4501 check_func  mmap
4502 check_func  mprotect
4503 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4504 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4505 check_func  sched_getaffinity
4506 check_func  setrlimit
4507 check_func  strerror_r
4508 check_func  sysconf
4509 check_func  sysctl
4510 check_func  usleep
4511
4512 check_func_headers io.h setmode
4513 check_func_headers stdlib.h getenv
4514
4515 check_func_headers windows.h CoTaskMemFree -lole32
4516 check_func_headers windows.h GetProcessAffinityMask
4517 check_func_headers windows.h GetProcessTimes
4518 check_func_headers windows.h GetSystemTimeAsFileTime
4519 check_func_headers windows.h LoadLibrary
4520 check_func_headers windows.h MapViewOfFile
4521 check_func_headers windows.h SetConsoleTextAttribute
4522 check_func_headers windows.h Sleep
4523 check_func_headers windows.h VirtualAlloc
4524 check_struct windows.h "CONDITION_VARIABLE" Ptr
4525
4526 check_header direct.h
4527 check_header dlfcn.h
4528 check_header d3d11.h
4529 check_header dxva.h
4530 check_header dxva2api.h
4531 check_header io.h
4532 check_header mach/mach_time.h
4533 check_header malloc.h
4534 check_header poll.h
4535 check_header sys/mman.h
4536 check_header sys/param.h
4537 check_header sys/resource.h
4538 check_header sys/select.h
4539 check_header sys/time.h
4540 check_header sys/un.h
4541 check_header unistd.h
4542 check_header valgrind/valgrind.h
4543 check_header vdpau/vdpau.h
4544 check_header vdpau/vdpau_x11.h
4545 check_header VideoDecodeAcceleration/VDADecoder.h
4546 check_header windows.h
4547 check_header X11/extensions/XvMClib.h
4548
4549 # it seems there are versions of clang in some distros that try to use the
4550 # gcc headers, which explodes for stdatomic
4551 # so we also check that atomics actually work here
4552 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4553
4554 check_lib "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4555 check_lib "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4556 check_lib "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4557
4558 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4559
4560 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4561 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4562 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4563
4564 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4565 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4566 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4567 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4568 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4569
4570 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4571
4572 if ! disabled w32threads && ! enabled pthreads; then
4573     check_func_headers "windows.h process.h" _beginthreadex &&
4574         enable w32threads || disable w32threads
4575 fi
4576
4577 # check for some common methods of building with pthread support
4578 # do this before the optional library checks as some of them require pthreads
4579 if ! disabled pthreads && ! enabled w32threads; then
4580     enable pthreads
4581     if check_func pthread_join -pthread; then
4582         add_cflags -pthread
4583         add_extralibs -pthread
4584     elif check_func pthread_join -pthreads; then
4585         add_cflags -pthreads
4586         add_extralibs -pthreads
4587     elif check_func pthread_join -lpthreadGC2; then
4588         add_extralibs -lpthreadGC2
4589     elif check_lib pthread.h pthread_join -lpthread; then
4590         :
4591     elif ! check_func pthread_join; then
4592         disable pthreads
4593     fi
4594 fi
4595
4596 enabled pthreads &&
4597     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4598
4599 disabled  zlib || check_lib  zlib.h      zlibVersion -lz   || disable  zlib
4600 disabled bzlib || check_lib bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4601
4602 check_lib math.h sin -lm && LIBM="-lm"
4603
4604 atan2f_args=2
4605 ldexpf_args=2
4606 powf_args=2
4607
4608 for func in $MATH_FUNCS; do
4609     eval check_mathfunc $func \${${func}_args:-1}
4610 done
4611
4612 # these are off by default, so fail if requested and not available
4613 enabled avisynth          && { check_lib "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4614                                check_lib "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4615                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4616 enabled cuda              && check_lib cuda.h cuInit -lcuda
4617 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4618 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4619 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4620 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4621 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4622 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4623 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4624 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4625 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4626                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4627                                done || die "ERROR: libgsm not found"; }
4628 enabled libhdcd           && require_pkg_config libhdcd "hdcd/hdcd_simple.h" hdcd_new
4629 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4630 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4631 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4632 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4633 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4634 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4635 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4636 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4637 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4638 enabled libopenjpeg       && { check_lib openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4639                                require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4640 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4641 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4642 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4643 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4644 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4645 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4646 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4647 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4648 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4649 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4650 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4651 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4652     enabled libvpx_vp8_decoder && {
4653         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4654             disable libvpx_vp8_decoder;
4655     }
4656     enabled libvpx_vp8_encoder && {
4657         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4658             disable libvpx_vp8_encoder;
4659     }
4660     enabled libvpx_vp9_decoder && {
4661         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4662             disable libvpx_vp9_decoder;
4663     }
4664     enabled libvpx_vp9_encoder && {
4665         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4666             disable libvpx_vp9_encoder;
4667     }
4668     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4669         die "libvpx enabled but no supported decoders found"
4670     fi
4671 }
4672 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4673 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4674 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4675                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4676                                die "ERROR: libx264 version must be >= 0.118."; } &&
4677                              { check_cpp_condition x264.h "X264_MPEG2" &&
4678                                enable libx262; }
4679 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4680                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4681                                die "ERROR: libx265 version must be >= 57."; }
4682 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4683 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4684 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4685                                 { ! enabled cross_compile && {
4686                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4687                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4688                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4689                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4690                                die "ERROR: mmal not found"; }
4691 enabled mmal && check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"
4692 enabled omx_rpi && enable omx
4693 enabled omx               && { check_header OMX_Core.h ||
4694                                 { ! enabled cross_compile && enabled omx_rpi && {
4695                                     add_cflags -isystem/opt/vc/include/IL ; }
4696                                 check_header OMX_Core.h ; } ||
4697                                die "ERROR: OpenMAX IL headers not found"; }
4698 enabled openssl           && { { check_pkg_config openssl openssl/ssl.h OPENSSL_init_ssl ||
4699                                  check_pkg_config openssl openssl/ssl.h SSL_library_init; } && {
4700                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4701                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4702                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4703                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4704                                die "ERROR: openssl not found"; }
4705
4706 if enabled gnutls; then
4707     { check_lib gmp.h mpz_export -lgmp && enable gmp; } ||
4708     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4709 fi
4710
4711 # libdc1394 check
4712 if enabled libdc1394; then
4713     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4714         enable libdc1394_2; } ||
4715     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4716         enable libdc1394_1; } ||
4717     die "ERROR: No version of libdc1394 found "
4718 fi
4719
4720 if enabled nvenc; then
4721     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4722     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6" ||
4723         die "ERROR: NVENC API version 5 or older is not supported"
4724 fi
4725
4726 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4727     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4728     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4729     enable sdl
4730 fi
4731
4732 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4733 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4734
4735 check_header linux/fb.h
4736 check_header linux/videodev2.h
4737 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4738
4739 check_header AVFoundation/AVFoundation.h &&
4740     check_objcflags -fobjc-arc &&
4741     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4742     disable AVFoundation_AVFoundation_h
4743
4744 check_header sys/videoio.h
4745
4746 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4747 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4748 # w32api 3.12 had it defined wrong
4749 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4750
4751 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4752 { check_header dev/bktr/ioctl_meteor.h &&
4753   check_header dev/bktr/ioctl_bt848.h; } ||
4754 { check_header machine/ioctl_meteor.h &&
4755   check_header machine/ioctl_bt848.h; } ||
4756 { check_header dev/video/meteor/ioctl_meteor.h &&
4757   check_header dev/video/bktr/ioctl_bt848.h; } ||
4758 check_header dev/ic/bt8xx.h
4759
4760 check_header sndio.h
4761 check_header sys/soundcard.h
4762 check_header soundcard.h
4763
4764 enabled_any alsa_indev alsa_outdev &&
4765     check_lib alsa/asoundlib.h snd_pcm_htimestamp -lasound
4766
4767 enabled jack_indev && check_lib jack/jack.h jack_client_open -ljack &&
4768     check_func jack_port_get_latency_range -ljack
4769
4770 enabled_any sndio_indev sndio_outdev && check_lib sndio.h sio_open -lsndio
4771
4772 if enabled libcdio; then
4773     check_lib "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4774     check_lib "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4775     die "ERROR: No usable libcdio/cdparanoia found"
4776 fi
4777
4778 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4779
4780 if enabled libxcb; then
4781     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4782         enabled libxcb && die "ERROR: libxcb not found";
4783     } && enable libxcb
4784
4785     disabled libxcb_shm ||
4786         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4787             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4788         } && check_header sys/shm.h && enable libxcb_shm
4789
4790     disabled libxcb_xfixes ||
4791         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4792             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4793         } && enable libxcb_xfixes
4794
4795     add_cflags "$xcb_shape_cflags $xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4796     add_extralibs "$xcb_shape_libs $xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4797 fi
4798
4799 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4800
4801 enabled vaapi &&
4802     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4803     disable vaapi
4804
4805 if enabled vaapi ; then
4806     enabled xlib &&
4807     check_lib "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4808     enable vaapi_x11
4809
4810     check_lib "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4811     enable vaapi_drm
4812 fi
4813
4814 enabled vdpau &&
4815     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4816     disable vdpau
4817
4818 enabled vdpau && enabled xlib &&
4819     check_lib "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4820     enable vdpau_x11
4821
4822 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4823
4824 # add some useful compiler flags if supported
4825 check_cflags -Wdeclaration-after-statement
4826 check_cflags -Wall
4827 check_cflags -Wdisabled-optimization
4828 check_cflags -Wpointer-arith
4829 check_cflags -Wredundant-decls
4830 check_cflags -Wwrite-strings
4831 check_cflags -Wtype-limits
4832 check_cflags -Wundef
4833 check_cflags -Wmissing-prototypes
4834 check_cflags -Wstrict-prototypes
4835 enabled extra_warnings && check_cflags -Winline
4836 enabled extra_warnings && check_cflags -Wcast-qual
4837
4838 check_disable_warning(){
4839     warning_flag=-W${1#-Wno-}
4840     test_cflags $warning_flag && add_cflags $1
4841 }
4842
4843 check_disable_warning -Wno-parentheses