configure: Add stdlib.h #include to CPPFLAGS check helper functions
[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:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-outdevs           show all available output devices
77   --list-filters           show all available filters
78
79 Standard options:
80   --logfile=FILE           log tests and output to FILE [avbuild/config.log]
81   --disable-logging        do not log configure debug information
82   --prefix=PREFIX          install in PREFIX [$prefix_default]
83   --bindir=DIR             install binaries in DIR [PREFIX/bin]
84   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
85   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
86   --libdir=DIR             install libs in DIR [PREFIX/lib]
87   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
88   --incdir=DIR             install includes in DIR [PREFIX/include]
89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
90   --enable-rpath           use rpath when linking programs (USE WITH CARE)
91
92 Licensing options:
93   --enable-gpl             allow use of GPL code, the resulting libs
94                            and binaries will be under GPL [no]
95   --enable-version3        upgrade (L)GPL to version 3 [no]
96   --enable-nonfree         allow use of nonfree code, the resulting libs
97                            and binaries will be unredistributable [no]
98
99 Configuration options:
100   --disable-static         do not build static libraries [no]
101   --enable-shared          build shared libraries [no]
102   --enable-small           optimize for size instead of speed
103   --enable-runtime-cpudetect detect CPU capabilities at runtime (bigger binary)
104   --enable-gray            enable full grayscale support (slower color)
105   --disable-swscale-alpha  disable alpha channel support in swscale
106   --disable-all            disable building components, libraries and programs
107
108 Program options:
109   --disable-programs       do not build command line programs
110   --disable-avconv         disable avconv build
111   --disable-avplay         disable avplay build
112   --disable-avprobe        disable avprobe build
113   --disable-avserver       deprecated, does nothing
114
115 Component options:
116   --disable-doc            do not build documentation
117   --disable-pod2man        do not build manual pages
118   --disable-texi2html      do not build HTML documentation
119   --disable-avdevice       disable libavdevice build
120   --disable-avcodec        disable libavcodec build
121   --disable-avformat       disable libavformat build
122   --disable-avutil         disable libavutil build
123   --disable-swscale        disable libswscale build
124   --disable-avfilter       disable video filter support [no]
125   --disable-avresample     disable libavresample build [no]
126   --disable-pthreads       disable pthreads [auto]
127   --disable-w32threads     disable Win32 threads [auto]
128   --disable-network        disable network support [no]
129   --disable-dct            disable DCT code
130   --disable-error-resilience disable error resilience code
131   --disable-lsp            disable LSP code
132   --disable-lzo            disable LZO decoder code
133   --disable-mdct           disable MDCT code
134   --disable-rdft           disable RDFT code
135   --disable-fft            disable FFT code
136   --disable-faan           disable floating point AAN (I)DCT code
137
138 Individual component options:
139   --disable-everything     disable all components listed below
140   --disable-encoder=NAME   disable encoder NAME
141   --enable-encoder=NAME    enable encoder NAME
142   --disable-encoders       disable all encoders
143   --disable-decoder=NAME   disable decoder NAME
144   --enable-decoder=NAME    enable decoder NAME
145   --disable-decoders       disable all decoders
146   --disable-hwaccel=NAME   disable hwaccel NAME
147   --enable-hwaccel=NAME    enable hwaccel NAME
148   --disable-hwaccels       disable all hwaccels
149   --disable-muxer=NAME     disable muxer NAME
150   --enable-muxer=NAME      enable muxer NAME
151   --disable-muxers         disable all muxers
152   --disable-demuxer=NAME   disable demuxer NAME
153   --enable-demuxer=NAME    enable demuxer NAME
154   --disable-demuxers       disable all demuxers
155   --enable-parser=NAME     enable parser NAME
156   --disable-parser=NAME    disable parser NAME
157   --disable-parsers        disable all parsers
158   --enable-bsf=NAME        enable bitstream filter NAME
159   --disable-bsf=NAME       disable bitstream filter NAME
160   --disable-bsfs           disable all bitstream filters
161   --enable-protocol=NAME   enable protocol NAME
162   --disable-protocol=NAME  disable protocol NAME
163   --disable-protocols      disable all protocols
164   --enable-indev=NAME      enable input device NAME
165   --disable-indev=NAME     disable input device NAME
166   --disable-indevs         disable input devices
167   --enable-outdev=NAME     enable output device NAME
168   --disable-outdev=NAME    disable output device NAME
169   --disable-outdevs        disable output devices
170   --disable-devices        disable all devices
171   --enable-filter=NAME     enable filter NAME
172   --disable-filter=NAME    disable filter NAME
173   --disable-filters        disable all filters
174
175 External library support:
176
177   Using any of the following switches will allow Libav to link to the
178   corresponding external library. All the components depending on that library
179   will become enabled, if all their other dependencies are met and they are not
180   explicitly disabled. E.g. --enable-libwavpack will enable linking to
181   libwavpack and allow the libwavpack encoder to be built, unless it is
182   specifically disabled with --disable-encoder=libwavpack.
183
184   Note that only the system libraries are auto-detected. All the other external
185   libraries must be explicitly enabled.
186
187   Also note that the following help text describes the purpose of the libraries
188   themselves, not all their features will necessarily be usable by Libav.
189
190   --enable-avisynth          video frameserver
191   --enable-avxsynth          Linux version of AviSynth
192   --enable-bzlib             bzip2 compression [autodetect]
193   --enable-frei0r            video filtering plugins
194   --enable-gnutls            crypto
195   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
196   --enable-libcdio           audio CD input
197   --enable-libdc1394         IEEE 1394/Firewire camera input
198   --enable-libdcadec         DCA audio decoding
199   --enable-libfaac           AAC audio encoding
200   --enable-libfdk-aac        AAC audio encoding/decoding
201   --enable-libfontconfig     font configuration and management
202   --enable-libfreetype       font rendering
203   --enable-libgsm            GSM audio encoding/decoding
204   --enable-libhdcd           HDCD decoding filter
205   --enable-libilbc           ILBC audio encoding/decoding
206   --enable-libkvazaar        HEVC video encoding
207   --enable-libmp3lame        MP3 audio encoding
208   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
209   --enable-libopencore-amrwb AMR-WB audio decoding
210   --enable-libopencv         computer vision
211   --enable-libopenh264       H.264 video encoding/decoding
212   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
213   --enable-libopus           Opus audio encoding/decoding
214   --enable-libpulse          Pulseaudio sound server
215   --enable-librtmp           RTMP streaming
216   --enable-libschroedinger   Dirac video encoding/decoding
217   --enable-libsnappy         snappy compression
218   --enable-libspeex          Speex audio encoding/decoding
219   --enable-libtheora         Theora video encoding/decoding
220   --enable-libtwolame        MP2 audio encoding
221   --enable-libvo-aacenc      AAC audio encoding
222   --enable-libvo-amrwbenc    AMR-WB audio encoding
223   --enable-libvorbis         Vorbis audio encoding/decoding
224   --enable-libvpx            VP* video encoding/decoding
225   --enable-libwavpack        Wavpack audio encoding/decoding
226   --enable-libwebp           WebP image encoding/decoding
227   --enable-libx264           H.264 video encoding
228   --enable-libx265           HEVC video encoding
229   --enable-libxavs           Chinese AVS video encoding
230   --enable-libxcb            X window system protocol communication
231   --enable-libxcb-shm        X11 shm communication [auto]
232   --enable-libxcb-xfixes     X11 mouse rendering [auto]
233   --enable-libxvid           MPEG-4 ASP video encoding
234   --enable-openssl           crypto
235   --enable-zlib              compression [autodetect]
236
237   The following libraries provide various hardware acceleration features:
238   --enable-cuda    Nvidia CUDA (dynamically linked)
239   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
240   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
241   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
242   --enable-libnpp  Nvidia CUDA processing
243   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
244   --enable-nvenc   Nvidia video encoding
245   --enable-omx     OpenMAX IL
246   --enable-omx-rpi OpenMAX IL for Raspberry Pi
247   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
248   --enable-vda     Apple Video Decode Acceleration [auto]
249   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
250
251 Toolchain options:
252   --arch=ARCH              select architecture [$arch]
253   --cpu=CPU                select the minimum required CPU (affects
254                            instruction selection, may crash on older CPUs)
255   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
256   --enable-cross-compile   assume a cross-compiler is used
257   --sysroot=PATH           root of cross-build tree
258   --sysinclude=PATH        location of cross-build system headers
259   --target-os=OS           compiler targets OS [$target_os]
260   --target-exec=CMD        command to run executables on target
261   --target-path=DIR        path to view of build directory on target
262   --target-samples=DIR     path to samples directory on target
263   --toolchain=NAME         set tool defaults according to NAME
264   --nm=NM                  use nm tool
265   --ar=AR                  use archive tool AR [$ar_default]
266   --as=AS                  use assembler AS [$as_default]
267   --cc=CC                  use C compiler CC [$cc_default]
268   --objcc=OCC              use ObjC compiler OCC [$cc_default]
269   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
270   --ld=LD                  use linker LD
271   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
272   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
273   --host-cc=HOSTCC         use host C compiler HOSTCC
274   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
275   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
276   --host-ld=HOSTLD         use host linker HOSTLD
277   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
278   --host-libs=HLIBS        use libs HLIBS when linking for host
279   --host-os=OS             compiler host OS [$target_os]
280   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
281   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
282   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
283   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
284   --extra-libs=ELIBS       add ELIBS [$ELIBS]
285   --extra-version=STRING   version string suffix []
286   --optflags=OPTFLAGS      override optimization-related compiler flags
287   --enable-pic             build position-independent code
288   --enable-thumb           compile for Thumb instruction set
289   --enable-lto             use link-time optimization
290   --env="ENV=override"     override the environment variables
291
292 Advanced options (experts only):
293   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
294   --custom-allocator=NAME  use a supported custom allocator
295   --disable-symver         disable symbol versioning
296   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
297   --disable-safe-bitstream-reader
298                            disable buffer boundary checking in bitreaders
299                            (faster, but may crash)
300   --enable-sram            allow use of on-chip SRAM
301
302 Optimization options (experts only):
303   --disable-asm            disable all assembly optimizations
304   --disable-altivec        disable AltiVec optimizations
305   --disable-vsx            disable VSX optimizations
306   --disable-power8         disable POWER8 optimizations
307   --disable-amd3dnow       disable 3DNow! optimizations
308   --disable-amd3dnowext    disable 3DNow! extended optimizations
309   --disable-mmx            disable MMX optimizations
310   --disable-mmxext         disable MMXEXT optimizations
311   --disable-sse            disable SSE optimizations
312   --disable-sse2           disable SSE2 optimizations
313   --disable-sse3           disable SSE3 optimizations
314   --disable-ssse3          disable SSSE3 optimizations
315   --disable-sse4           disable SSE4 optimizations
316   --disable-sse42          disable SSE4.2 optimizations
317   --disable-avx            disable AVX optimizations
318   --disable-xop            disable XOP optimizations
319   --disable-fma3           disable FMA3 optimizations
320   --disable-fma4           disable FMA4 optimizations
321   --disable-avx2           disable AVX2 optimizations
322   --disable-armv5te        disable armv5te optimizations
323   --disable-armv6          disable armv6 optimizations
324   --disable-armv6t2        disable armv6t2 optimizations
325   --disable-vfp            disable VFP optimizations
326   --disable-neon           disable NEON optimizations
327   --disable-inline-asm     disable use of inline assembly
328   --disable-yasm           disable use of nasm/yasm assembly
329
330 Developer options (useful when working on Libav itself):
331   --disable-debug          disable debugging symbols
332   --enable-debug=LEVEL     set the debug level [$debuglevel]
333   --disable-optimizations  disable compiler optimizations
334   --enable-extra-warnings  enable more compiler warnings
335   --samples=PATH           location of test samples for FATE, if not set use
336                            \$LIBAV_SAMPLES at make invocation time.
337   --enable-neon-clobber-test check NEON registers for clobbering (should be
338                            used only for debugging purposes)
339   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
340                            should be used only for debugging purposes)
341   --enable-random          randomly enable/disable components
342   --disable-random
343   --enable-random=LIST     randomly enable/disable specific components or
344   --disable-random=LIST    component groups. LIST is a comma-separated list
345                            of NAME[:PROB] entries where NAME is a component
346                            (group) and PROB the probability associated with
347                            NAME (default 0.5).
348   --random-seed=VALUE      seed value for --enable/disable-random
349   --disable-valgrind-backtrace do not print a backtrace under Valgrind
350                            (only applies to --disable-optimizations builds)
351   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
352                            in the name) of tests whose result is ignored
353
354 NOTE: Object files are built at the place where configure is launched.
355 EOF
356   exit 0
357 }
358
359 quotes='""'
360
361 log(){
362     echo "$@" >> $logfile
363 }
364
365 log_file(){
366     log BEGIN $1
367     i=1
368     while read line; do
369         printf '%5s   %s\n' "${i}" "${line}"
370         i=$(($i+1))
371     done < $1 >> $logfile
372     log END $1
373 }
374
375 echolog(){
376     log "$@"
377     echo "$@"
378 }
379
380 warn(){
381     log "WARNING: $*"
382     WARNINGS="${WARNINGS}WARNING: $*\n"
383 }
384
385 die(){
386     echolog "$@"
387     cat <<EOF
388
389 If you think configure made a mistake, make sure you are using the latest
390 version from Git.  If the latest version fails, report the problem to the
391 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
392 EOF
393     if disabled logging; then
394         cat <<EOF
395 Rerun configure with logging enabled (do not use --disable-logging), and
396 include the log this produces with your report.
397 EOF
398     else
399         cat <<EOF
400 Include the log file "$logfile" produced by configure as this will help
401 solving the problem.
402 EOF
403     fi
404     exit 1
405 }
406
407 # Avoid locale weirdness, besides we really just want to translate ASCII.
408 toupper(){
409     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
410 }
411
412 tolower(){
413     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
414 }
415
416 c_escape(){
417     echo "$*" | sed 's/["\\]/\\\0/g'
418 }
419
420 sh_quote(){
421     v=$(echo "$1" | sed "s/'/'\\\\''/g")
422     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
423     echo "$v"
424 }
425
426 cleanws(){
427     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
428 }
429
430 filter(){
431     pat=$1
432     shift
433     for v; do
434         eval "case $v in $pat) printf '%s ' $v ;; esac"
435     done
436 }
437
438 filter_out(){
439     pat=$1
440     shift
441     for v; do
442         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
443     done
444 }
445
446 map(){
447     m=$1
448     shift
449     for v; do eval $m; done
450 }
451
452 add_suffix(){
453     suffix=$1
454     shift
455     for v; do echo ${v}${suffix}; done
456 }
457
458 set_all(){
459     value=$1
460     shift
461     for var in $*; do
462         eval $var=$value
463     done
464 }
465
466 set_weak(){
467     value=$1
468     shift
469     for var; do
470         eval : \${$var:=$value}
471     done
472 }
473
474 sanitize_var_name(){
475     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
476 }
477
478 set_safe(){
479     var=$1
480     shift
481     eval $(sanitize_var_name "$var")='$*'
482 }
483
484 get_safe(){
485     eval echo \$$(sanitize_var_name "$1")
486 }
487
488 pushvar(){
489     for pvar in $*; do
490         eval level=\${${pvar}_level:=0}
491         eval ${pvar}_${level}="\$$pvar"
492         eval ${pvar}_level=$(($level+1))
493     done
494 }
495
496 popvar(){
497     for pvar in $*; do
498         eval level=\${${pvar}_level:-0}
499         test $level = 0 && continue
500         eval level=$(($level-1))
501         eval $pvar="\${${pvar}_${level}}"
502         eval ${pvar}_level=$level
503         eval unset ${pvar}_${level}
504     done
505 }
506
507 enable(){
508     set_all yes $*
509 }
510
511 disable(){
512     set_all no $*
513 }
514
515 enable_weak(){
516     set_weak yes $*
517 }
518
519 disable_weak(){
520     set_weak no $*
521 }
522
523 enable_safe(){
524     for var; do
525         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
526     done
527 }
528
529 disable_safe(){
530     for var; do
531         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
532     done
533 }
534
535 do_enable_deep(){
536     for var; do
537         enabled $var && continue
538         eval sel="\$${var}_select"
539         eval sgs="\$${var}_suggest"
540         pushvar var sgs
541         enable_deep $sel
542         popvar sgs
543         enable_deep_weak $sgs
544         popvar var
545     done
546 }
547
548 enable_deep(){
549     do_enable_deep $*
550     enable $*
551 }
552
553 enable_deep_weak(){
554     for var; do
555         disabled $var && continue
556         pushvar var
557         do_enable_deep $var
558         popvar var
559         enable_weak $var
560     done
561 }
562
563 enabled(){
564     test "${1#!}" = "$1" && op== || op=!=
565     eval test "x\$${1#!}" $op "xyes"
566 }
567
568 disabled(){
569     test "${1#!}" = "$1" && op== || op=!=
570     eval test "x\$${1#!}" $op "xno"
571 }
572
573 enabled_all(){
574     for opt; do
575         enabled $opt || return 1
576     done
577 }
578
579 disabled_all(){
580     for opt; do
581         disabled $opt || return 1
582     done
583 }
584
585 enabled_any(){
586     for opt; do
587         enabled $opt && return 0
588     done
589 }
590
591 disabled_any(){
592     for opt; do
593         disabled $opt && return 0
594     done
595     return 1
596 }
597
598 set_default(){
599     for opt; do
600         eval : \${$opt:=\$${opt}_default}
601     done
602 }
603
604 is_in(){
605     value=$1
606     shift
607     for var in $*; do
608         [ $var = $value ] && return 0
609     done
610     return 1
611 }
612
613 do_check_deps(){
614     for cfg; do
615         cfg="${cfg#!}"
616         enabled ${cfg}_checking && die "Circular dependency for $cfg."
617         disabled ${cfg}_checking && continue
618         enable ${cfg}_checking
619         append allopts $cfg
620
621         eval dep_all="\$${cfg}_deps"
622         eval dep_any="\$${cfg}_deps_any"
623         eval dep_sel="\$${cfg}_select"
624         eval dep_sgs="\$${cfg}_suggest"
625         eval dep_ifa="\$${cfg}_if"
626         eval dep_ifn="\$${cfg}_if_any"
627
628         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
629         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
630         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
631
632         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
633         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
634         enabled_all  $dep_all || disable $cfg
635         enabled_any  $dep_any || disable $cfg
636         disabled_any $dep_sel && disable $cfg
637
638         if enabled $cfg; then
639             enable_deep $dep_sel
640             enable_deep_weak $dep_sgs
641         fi
642
643         disable ${cfg}_checking
644     done
645 }
646
647 check_deps(){
648     unset allopts
649
650     do_check_deps "$@"
651
652     for cfg in $allopts; do
653         enabled $cfg || continue
654         eval dep_extralibs="\$${cfg}_extralibs"
655         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
656     done
657 }
658
659 print_config(){
660     pfx=$1
661     files=$2
662     shift 2
663     map 'eval echo "$v \${$v:-no}"' "$@" |
664     awk "BEGIN { split(\"$files\", files) }
665         {
666             c = \"$pfx\" toupper(\$1);
667             v = \$2;
668             sub(/yes/, 1, v);
669             sub(/no/,  0, v);
670             for (f in files) {
671                 file = files[f];
672                 if (file ~ /\\.h\$/) {
673                     printf(\"#define %s %d\\n\", c, v) >>file;
674                 } else if (file ~ /\\.asm\$/) {
675                     printf(\"%%define %s %d\\n\", c, v) >>file;
676                 } else if (file ~ /\\.mak\$/) {
677                     n = -v ? \"\" : \"!\";
678                     printf(\"%s%s=yes\\n\", n, c) >>file;
679                 }
680             }
681         }"
682 }
683
684 print_enabled(){
685     suf=$1
686     shift
687     for v; do
688         enabled $v && printf "%s\n" ${v%$suf}
689     done
690 }
691
692 append(){
693     var=$1
694     shift
695     eval "$var=\"\$$var $*\""
696 }
697
698 prepend(){
699     var=$1
700     shift
701     eval "$var=\"$* \$$var\""
702 }
703
704 unique(){
705     var=$1
706     uniq_list=""
707     for tok in $(eval echo \$$var); do
708         uniq_list="$(filter_out $tok $uniq_list) $tok"
709     done
710     eval "$var=\"${uniq_list}\""
711 }
712
713 add_cppflags(){
714     append CPPFLAGS "$@"
715 }
716
717 add_cflags(){
718     append CFLAGS $($cflags_filter "$@")
719 }
720
721 add_cflags_headers(){
722     append CFLAGS_HEADERS $($cflags_filter "$@")
723 }
724
725 add_asflags(){
726     append ASFLAGS $($asflags_filter "$@")
727 }
728
729 add_objcflags(){
730     append OBJCFLAGS $($objcflags_filter "$@")
731 }
732
733 add_ldflags(){
734     append LDFLAGS $($ldflags_filter "$@")
735 }
736
737 add_ldexeflags(){
738     append LDEXEFLAGS $($ldflags_filter "$@")
739 }
740
741 add_stripflags(){
742     append STRIPFLAGS "$@"
743 }
744
745 add_extralibs(){
746     prepend extralibs $($ldflags_filter "$@")
747 }
748
749 add_host_cppflags(){
750     append host_cppflags "$@"
751 }
752
753 add_host_cflags(){
754     append host_cflags $($host_cflags_filter "$@")
755 }
756
757 add_host_ldflags(){
758     append host_ldflags $($host_ldflags_filter "$@")
759 }
760
761 add_compat(){
762     append compat_objs $1
763     shift
764     map 'add_cppflags -D$v' "$@"
765 }
766
767 check_cmd(){
768     log "$@"
769     "$@" >> $logfile 2>&1
770 }
771
772 cc_o(){
773     eval printf '%s\\n' $CC_O
774 }
775
776 cc_e(){
777     eval printf '%s\\n' $CC_E
778 }
779
780 check_cc(){
781     log check_cc "$@"
782     cat > $TMPC
783     log_file $TMPC
784     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
785 }
786
787 check_objcc(){
788     log check_objcc "$@"
789     cat > $TMPC
790     log_file $TMPC
791     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
792 }
793
794 check_cpp(){
795     log check_cpp "$@"
796     cat > $TMPC
797     log_file $TMPC
798     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
799 }
800
801 as_o(){
802     eval printf '%s\\n' $AS_O
803 }
804
805 check_as(){
806     log check_as "$@"
807     cat > $TMPS
808     log_file $TMPS
809     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
810 }
811
812 check_inline_asm(){
813     log check_inline_asm "$@"
814     name="$1"
815     code="$2"
816     shift 2
817     disable $name
818     check_cc "$@" <<EOF && enable $name
819 void foo(void){ __asm__ volatile($code); }
820 EOF
821 }
822
823 check_insn(){
824     log check_insn "$@"
825     check_inline_asm ${1}_inline "\"$2\""
826     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
827 }
828
829 check_yasm(){
830     log check_yasm "$@"
831     echo "$1" > $TMPS
832     log_file $TMPS
833     shift 1
834     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
835 }
836
837 ld_o(){
838     eval printf '%s\\n' $LD_O
839 }
840
841 check_ld(){
842     log check_ld "$@"
843     flags=$(filter_out '-l*' "$@")
844     libs=$(filter '-l*' "$@")
845     check_cc $($cflags_filter $flags) || return
846     flags=$($ldflags_filter $flags)
847     libs=$($ldflags_filter $libs)
848     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
849 }
850
851 print_include(){
852     hdr=$1
853     test "${hdr%.h}" = "${hdr}" &&
854         echo "#include $hdr"    ||
855         echo "#include <$hdr>"
856 }
857
858 check_code(){
859     log check_code "$@"
860     check=$1
861     headers=$2
862     code=$3
863     shift 3
864     {
865         for hdr in $headers; do
866             print_include $hdr
867         done
868         echo "int main(void) { $code; return 0; }"
869     } | check_$check "$@"
870 }
871
872 check_cppflags(){
873     log check_cppflags "$@"
874     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
875 #include <stdlib.h>;
876 EOF
877 }
878
879 test_cflags(){
880     log test_cflags "$@"
881     set -- $($cflags_filter "$@")
882     check_cc "$@" <<EOF
883 int x;
884 EOF
885 }
886
887 check_cflags(){
888     log check_cflags "$@"
889     test_cflags "$@" && add_cflags "$@"
890 }
891
892 test_objcflags(){
893     log test_objcflags "$@"
894     set -- $($objcflags_filter "$@")
895     check_objcc "$@" <<EOF
896 int x;
897 EOF
898 }
899
900 check_objcflags(){
901     log check_objcflags "$@"
902     test_objcflags "$@" && add_objcflags "$@"
903 }
904
905 test_ldflags(){
906     log test_ldflags "$@"
907     check_ld "$@" <<EOF
908 int main(void){ return 0; }
909 EOF
910 }
911
912 check_ldflags(){
913     log check_ldflags "$@"
914     test_ldflags "$@" && add_ldflags "$@"
915 }
916
917 test_stripflags(){
918     log test_stripflags "$@"
919     # call check_cc to get a fresh TMPO
920     check_cc <<EOF
921 int main(void) { return 0; }
922 EOF
923     check_cmd $strip $STRIPFLAGS "$@" $TMPO
924 }
925
926 check_stripflags(){
927     log check_stripflags "$@"
928     test_stripflags "$@" && add_stripflags "$@"
929 }
930
931 check_header(){
932     log check_header "$@"
933     header=$1
934     shift
935     disable_safe $header
936     check_cpp "$@" <<EOF && enable_safe $header
937 #include <$header>
938 int x;
939 EOF
940 }
941
942 check_func(){
943     log check_func "$@"
944     func=$1
945     shift
946     disable $func
947     check_ld "$@" <<EOF && enable $func
948 extern int $func();
949 int main(void){ $func(); }
950 EOF
951 }
952
953 check_mathfunc(){
954     log check_mathfunc "$@"
955     func=$1
956     narg=$2
957     shift 2
958     test $narg = 2 && args="f, g" || args="f"
959     disable $func
960     check_ld "$@" <<EOF && enable $func
961 #include <math.h>
962 float foo(float f, float g) { return $func($args); }
963 int main(void){ return 0; }
964 EOF
965 }
966
967 check_func_headers(){
968     log check_func_headers "$@"
969     headers=$1
970     funcs=$2
971     shift 2
972     {
973         for hdr in $headers; do
974             print_include $hdr
975         done
976         for func in $funcs; do
977             echo "long check_$func(void) { return (long) $func; }"
978         done
979         echo "int main(void) { return 0; }"
980     } | check_ld "$@" && enable $funcs && enable_safe $headers
981 }
982
983 check_cpp_condition(){
984     log check_cpp_condition "$@"
985     header=$1
986     condition=$2
987     shift 2
988     check_cpp "$@" <<EOF
989 #include <$header>
990 #if !($condition)
991 #error "unsatisfied condition: $condition"
992 #endif
993 EOF
994 }
995
996 test_cflags_cpp(){
997     log test_cflags_cpp "$@"
998     flags=$1
999     condition=$2
1000     shift 2
1001     set -- $($cflags_filter "$flags")
1002     check_cpp "$@" <<EOF
1003 #if !($condition)
1004 #error "unsatisfied condition: $condition"
1005 #endif
1006 EOF
1007 }
1008
1009 check_lib(){
1010     log check_lib "$@"
1011     name="$1"
1012     headers="$2"
1013     funcs="$3"
1014     shift 3
1015     disable $name
1016     check_func_headers "$headers" "$funcs" "$@" &&
1017         enable $name && add_extralibs "$@"
1018 }
1019
1020 check_pkg_config(){
1021     log check_pkg_config "$@"
1022     pkg_version="$1"
1023     pkg="${1%% *}"
1024     headers="$2"
1025     funcs="$3"
1026     shift 3
1027     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1028     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1029     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1030     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1031         set_safe "${pkg}_cflags"    $pkg_cflags &&
1032         set_safe "${pkg}_extralibs" $pkg_libs
1033 }
1034
1035 check_exec(){
1036     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1037 }
1038
1039 check_exec_crash(){
1040     log check_exec_crash "$@"
1041     code=$(cat)
1042
1043     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1044     # are safe but may not be available everywhere.  Thus we use
1045     # raise(SIGTERM) instead.  The check is run in a subshell so we
1046     # can redirect the "Terminated" message from the shell.  SIGBUS
1047     # is not defined by standard C so it is used conditionally.
1048
1049     (check_exec "$@") >> $logfile 2>&1 <<EOF
1050 #include <signal.h>
1051 static void sighandler(int sig){
1052     raise(SIGTERM);
1053 }
1054 int foo(void){
1055     $code
1056 }
1057 int (*func_ptr)(void) = foo;
1058 int main(void){
1059     signal(SIGILL, sighandler);
1060     signal(SIGFPE, sighandler);
1061     signal(SIGSEGV, sighandler);
1062 #ifdef SIGBUS
1063     signal(SIGBUS, sighandler);
1064 #endif
1065     return func_ptr();
1066 }
1067 EOF
1068 }
1069
1070 check_type(){
1071     log check_type "$@"
1072     headers=$1
1073     type=$2
1074     shift 2
1075     disable_safe "$type"
1076     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1077 }
1078
1079 check_struct(){
1080     log check_struct "$@"
1081     headers=$1
1082     struct=$2
1083     member=$3
1084     shift 3
1085     disable_safe "${struct}_${member}"
1086     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1087         enable_safe "${struct}_${member}"
1088 }
1089
1090 check_builtin(){
1091     log check_builtin "$@"
1092     name=$1
1093     headers=$2
1094     builtin=$3
1095     shift 3
1096     disable "$name"
1097     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1098 }
1099
1100 check_compile_assert(){
1101     log check_compile_assert "$@"
1102     name=$1
1103     headers=$2
1104     condition=$3
1105     shift 3
1106     disable "$name"
1107     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1108 }
1109
1110 require(){
1111     log require "$@"
1112     name_version="$1"
1113     name="${1%% *}"
1114     headers="$2"
1115     func="$3"
1116     shift 3
1117     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1118 }
1119
1120 require_header(){
1121     log require "$@"
1122     header="$1"
1123     shift
1124     check_header "$header" "$@" || die "ERROR: $header not found"
1125 }
1126
1127 require_cpp_condition(){
1128     log require "$@"
1129     header="$1"
1130     condition="$2"
1131     shift 2
1132     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1133 }
1134
1135 require_pkg_config(){
1136     log require_pkg_config "$@"
1137     pkg_version="$1"
1138     pkg="${1%% *}"
1139     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1140     add_cflags    $(get_safe "${pkg}_cflags")
1141     add_extralibs $(get_safe "${pkg}_extralibs")
1142 }
1143
1144 hostcc_e(){
1145     eval printf '%s\\n' $HOSTCC_E
1146 }
1147
1148 hostcc_o(){
1149     eval printf '%s\\n' $HOSTCC_O
1150 }
1151
1152 check_host_cc(){
1153     log check_host_cc "$@"
1154     cat > $TMPC
1155     log_file $TMPC
1156     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1157 }
1158
1159 check_host_cpp(){
1160     log check_host_cpp "$@"
1161     cat > $TMPC
1162     log_file $TMPC
1163     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1164 }
1165
1166 check_host_cppflags(){
1167     log check_host_cppflags "$@"
1168     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1169 #include <stdlib.h>;
1170 EOF
1171 }
1172
1173 check_host_cflags(){
1174     log check_host_cflags "$@"
1175     set -- $($host_cflags_filter "$@")
1176     check_host_cc "$@" <<EOF && append host_cflags "$@"
1177 int x;
1178 EOF
1179 }
1180
1181 check_host_cpp_condition(){
1182     log check_host_cpp_condition "$@"
1183     header=$1
1184     condition=$2
1185     shift 2
1186     check_host_cpp "$@" <<EOF
1187 #include <$header>
1188 #if !($condition)
1189 #error "unsatisfied condition: $condition"
1190 #endif
1191 EOF
1192 }
1193
1194 apply(){
1195     file=$1
1196     shift
1197     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1198 }
1199
1200 cp_if_changed(){
1201     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1202     mkdir -p "$(dirname $2)"
1203     cp -f "$1" "$2"
1204 }
1205
1206 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1207 # system-dependent things.
1208
1209 AVCODEC_COMPONENTS="
1210     bsfs
1211     decoders
1212     encoders
1213     hwaccels
1214     parsers
1215 "
1216
1217 AVDEVICE_COMPONENTS="
1218     indevs
1219     outdevs
1220 "
1221 AVFILTER_COMPONENTS="
1222     filters
1223 "
1224 AVFORMAT_COMPONENTS="
1225     demuxers
1226     muxers
1227     protocols
1228 "
1229
1230 AVRESAMPLE_COMPONENTS=""
1231 AVUTIL_COMPONENTS=""
1232
1233 COMPONENT_LIST="
1234     $AVCODEC_COMPONENTS
1235     $AVDEVICE_COMPONENTS
1236     $AVFILTER_COMPONENTS
1237     $AVFORMAT_COMPONENTS
1238     $AVRESAMPLE_COMPONENTS
1239     $AVUTIL_COMPONENTS
1240 "
1241
1242 EXAMPLE_LIST="
1243     decode_audio_example
1244     decode_video_example
1245     encode_audio_example
1246     encode_video_example
1247     filter_audio_example
1248     metadata_example
1249     output_example
1250     qsvdec_example
1251     transcode_aac_example
1252 "
1253
1254 HWACCEL_LIBRARY_NONFREE_LIST="
1255     cuda
1256     libnpp
1257 "
1258 HWACCEL_LIBRARY_LIST="
1259     $HWACCEL_LIBRARY_NONFREE_LIST
1260     d3d11va
1261     dxva2
1262     libmfx
1263     mmal
1264     nvenc
1265     omx
1266     vaapi
1267     vda
1268     vdpau
1269 "
1270
1271 EXTERNAL_LIBRARY_GPL_LIST="
1272     libcdio
1273     libx264
1274     libx265
1275     libxavs
1276     libxvid
1277 "
1278
1279 EXTERNAL_LIBRARY_NONFREE_LIST="
1280     libfaac
1281     libfdk_aac
1282     openssl
1283 "
1284
1285 EXTERNAL_LIBRARY_VERSION3_LIST="
1286     libopencore_amrnb
1287     libopencore_amrwb
1288     libvo_aacenc
1289     libvo_amrwbenc
1290 "
1291
1292 EXTERNAL_LIBRARY_LIST="
1293     $EXTERNAL_LIBRARY_GPL_LIST
1294     $EXTERNAL_LIBRARY_NONFREE_LIST
1295     $EXTERNAL_LIBRARY_VERSION3_LIST
1296     avisynth
1297     avxsynth
1298     bzlib
1299     frei0r
1300     gnutls
1301     libbs2b
1302     libdc1394
1303     libdcadec
1304     libfontconfig
1305     libfreetype
1306     libgsm
1307     libhdcd
1308     libilbc
1309     libkvazaar
1310     libmp3lame
1311     libopencv
1312     libopenh264
1313     libopenjpeg
1314     libopus
1315     libpulse
1316     librtmp
1317     libschroedinger
1318     libsnappy
1319     libspeex
1320     libtheora
1321     libtwolame
1322     libvorbis
1323     libvpx
1324     libwavpack
1325     libwebp
1326     libxcb
1327     libxcb_shm
1328     libxcb_xfixes
1329     zlib
1330 "
1331
1332 FEATURE_LIST="
1333     gray
1334     hardcoded_tables
1335     omx_rpi
1336     runtime_cpudetect
1337     safe_bitstream_reader
1338     shared
1339     small
1340     sram
1341     static
1342     swscale_alpha
1343 "
1344
1345 LIBRARY_LIST="
1346     avcodec
1347     avdevice
1348     avfilter
1349     avformat
1350     avresample
1351     avutil
1352     swscale
1353 "
1354
1355 LICENSE_LIST="
1356     gpl
1357     nonfree
1358     version3
1359 "
1360
1361 PROGRAM_LIST="
1362     avconv
1363     avplay
1364     avprobe
1365 "
1366
1367 SUBSYSTEM_LIST="
1368     dct
1369     doc
1370     error_resilience
1371     faan
1372     fft
1373     lsp
1374     lzo
1375     mdct
1376     network
1377     rdft
1378 "
1379
1380 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1381 CONFIG_LIST="
1382     $EXAMPLE_LIST
1383     $EXTERNAL_LIBRARY_LIST
1384     $HWACCEL_LIBRARY_LIST
1385     $FEATURE_LIST
1386     $LICENSE_LIST
1387     $LIBRARY_LIST
1388     $PROGRAM_LIST
1389     $SUBSYSTEM_LIST
1390     neon_clobber_test
1391     pic
1392     pod2man
1393     texi2html
1394     thumb
1395     valgrind_backtrace
1396     xmm_clobber_test
1397     $COMPONENT_LIST
1398 "
1399
1400 THREADS_LIST="
1401     pthreads
1402     w32threads
1403 "
1404
1405 ATOMICS_LIST="
1406     atomics_gcc
1407     atomics_suncc
1408     atomics_win32
1409 "
1410
1411 ARCH_LIST="
1412     aarch64
1413     alpha
1414     arm
1415     avr32
1416     avr32_ap
1417     avr32_uc
1418     bfin
1419     ia64
1420     m68k
1421     mips
1422     mips64
1423     parisc
1424     ppc
1425     ppc64
1426     s390
1427     sh4
1428     sparc
1429     sparc64
1430     tilegx
1431     tilepro
1432     tomi
1433     x86
1434     x86_32
1435     x86_64
1436 "
1437
1438 ARCH_EXT_LIST_ARM="
1439     armv5te
1440     armv6
1441     armv6t2
1442     armv8
1443     neon
1444     vfp
1445     vfpv3
1446 "
1447
1448 ARCH_EXT_LIST_X86_SIMD="
1449     amd3dnow
1450     amd3dnowext
1451     avx
1452     avx2
1453     fma3
1454     fma4
1455     mmx
1456     mmxext
1457     sse
1458     sse2
1459     sse3
1460     sse4
1461     sse42
1462     ssse3
1463     xop
1464 "
1465
1466 ARCH_EXT_LIST_PPC="
1467     altivec
1468     dcbzl
1469     ldbrx
1470     power8
1471     ppc4xx
1472     vsx
1473 "
1474
1475 ARCH_EXT_LIST_X86="
1476     $ARCH_EXT_LIST_X86_SIMD
1477     cpunop
1478     i686
1479 "
1480
1481 ARCH_EXT_LIST_MIPS="
1482     loongson
1483     mips32r1
1484     mips64r1
1485     mips32r2
1486     mips64r2
1487     mips32r6
1488     mips64r6
1489 "
1490
1491 ARCH_EXT_LIST="
1492     $ARCH_EXT_LIST_ARM
1493     $ARCH_EXT_LIST_MIPS
1494     $ARCH_EXT_LIST_PPC
1495     $ARCH_EXT_LIST_X86
1496     vis
1497 "
1498
1499 ARCH_FEATURES="
1500     aligned_stack
1501     fast_64bit
1502     fast_clz
1503     fast_cmov
1504     local_aligned_8
1505     local_aligned_16
1506     local_aligned_32
1507     simd_align_16
1508     simd_align_32
1509 "
1510
1511 BUILTIN_LIST="
1512     atomic_cas_ptr
1513     machine_rw_barrier
1514     MemoryBarrier
1515     mm_empty
1516     rdtsc
1517     sem_timedwait
1518     sync_val_compare_and_swap
1519 "
1520 HAVE_LIST_CMDLINE="
1521     inline_asm
1522     symver
1523     yasm
1524 "
1525
1526 HAVE_LIST_PUB="
1527     bigendian
1528     fast_unaligned
1529 "
1530
1531 HEADERS_LIST="
1532     AVFoundation_AVFoundation_h
1533     alsa_asoundlib_h
1534     altivec_h
1535     arpa_inet_h
1536     cdio_paranoia_h
1537     cdio_paranoia_paranoia_h
1538     d3d11_h
1539     dispatch_dispatch_h
1540     dev_bktr_ioctl_bt848_h
1541     dev_bktr_ioctl_meteor_h
1542     dev_ic_bt8xx_h
1543     dev_video_bktr_ioctl_bt848_h
1544     dev_video_meteor_ioctl_meteor_h
1545     direct_h
1546     dlfcn_h
1547     dxva_h
1548     gsm_h
1549     io_h
1550     mach_mach_time_h
1551     machine_ioctl_bt848_h
1552     machine_ioctl_meteor_h
1553     malloc_h
1554     poll_h
1555     sndio_h
1556     soundcard_h
1557     stdatomic_h
1558     sys_mman_h
1559     sys_param_h
1560     sys_resource_h
1561     sys_select_h
1562     sys_soundcard_h
1563     sys_time_h
1564     sys_un_h
1565     sys_videoio_h
1566     unistd_h
1567     valgrind_valgrind_h
1568     windows_h
1569     winsock2_h
1570 "
1571
1572 INTRINSICS_LIST="
1573     intrinsics_neon
1574 "
1575
1576 MATH_FUNCS="
1577     atanf
1578     atan2f
1579     cbrtf
1580     cosf
1581     exp2
1582     exp2f
1583     expf
1584     isinf
1585     isnan
1586     ldexpf
1587     llrint
1588     llrintf
1589     log2
1590     log2f
1591     log10f
1592     lrint
1593     lrintf
1594     powf
1595     rint
1596     round
1597     roundf
1598     sinf
1599     trunc
1600     truncf
1601 "
1602
1603 SYSTEM_FUNCS="
1604     aligned_malloc
1605     clock_gettime
1606     closesocket
1607     CommandLineToArgvW
1608     CoTaskMemFree
1609     CryptGenRandom
1610     dlopen
1611     fcntl
1612     flt_lim
1613     fork
1614     getaddrinfo
1615     gethrtime
1616     getopt
1617     GetProcessAffinityMask
1618     GetProcessMemoryInfo
1619     GetProcessTimes
1620     getrusage
1621     GetSystemTimeAsFileTime
1622     gettimeofday
1623     gmtime_r
1624     inet_aton
1625     isatty
1626     jack_port_get_latency_range
1627     LoadLibrary
1628     localtime_r
1629     mach_absolute_time
1630     MapViewOfFile
1631     memalign
1632     mkstemp
1633     mmap
1634     mprotect
1635     nanosleep
1636     posix_memalign
1637     sched_getaffinity
1638     SetConsoleTextAttribute
1639     setmode
1640     setrlimit
1641     Sleep
1642     strerror_r
1643     sysconf
1644     sysctl
1645     usleep
1646     VirtualAlloc
1647 "
1648
1649 TOOLCHAIN_FEATURES="
1650     as_dn_directive
1651     as_fpu_directive
1652     as_func
1653     as_object_arch
1654     asm_mod_q
1655     attribute_may_alias
1656     attribute_packed
1657     blocks_extension
1658     ebp_available
1659     ebx_available
1660     gnu_as
1661     ibm_asm
1662     inline_asm_labels
1663     pragma_deprecated
1664     symver_asm_label
1665     symver_gnu_asm
1666     vfp_args
1667     xform_asm
1668     xmm_clobbers
1669 "
1670
1671 TYPES_LIST="
1672     CONDITION_VARIABLE_Ptr
1673     socklen_t
1674     struct_addrinfo
1675     struct_group_source_req
1676     struct_ip_mreq_source
1677     struct_ipv6_mreq
1678     struct_pollfd
1679     struct_rusage_ru_maxrss
1680     struct_sockaddr_in6
1681     struct_sockaddr_sa_len
1682     struct_sockaddr_storage
1683     struct_v4l2_frmivalenum_discrete
1684 "
1685
1686 HAVE_LIST="
1687     $ARCH_EXT_LIST
1688     $(add_suffix _external $ARCH_EXT_LIST)
1689     $(add_suffix _inline   $ARCH_EXT_LIST)
1690     $ARCH_FEATURES
1691     $BUILTIN_LIST
1692     $HAVE_LIST_CMDLINE
1693     $HAVE_LIST_PUB
1694     $HEADERS_LIST
1695     $INTRINSICS_LIST
1696     $MATH_FUNCS
1697     $SYSTEM_FUNCS
1698     $THREADS_LIST
1699     $TOOLCHAIN_FEATURES
1700     $TYPES_LIST
1701     dos_paths
1702     dxva2_lib
1703     libc_msvcrt
1704     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1705     sdl
1706     section_data_rel_ro
1707     threads
1708     vaapi_drm
1709     vaapi_x11
1710     vdpau_x11
1711 "
1712
1713 # options emitted with CONFIG_ prefix but not available on the command line
1714 CONFIG_EXTRA="
1715     aandcttables
1716     ac3dsp
1717     audio_frame_queue
1718     audiodsp
1719     blockdsp
1720     bswapdsp
1721     cabac
1722     dirac_parse
1723     dvprofile
1724     faandct
1725     faanidct
1726     fdctdsp
1727     flacdsp
1728     fmtconvert
1729     g722dsp
1730     gmp
1731     golomb
1732     gplv3
1733     h263dsp
1734     h264chroma
1735     h264dsp
1736     h264parse
1737     h264pred
1738     h264qpel
1739     hevc_ps
1740     hpeldsp
1741     huffman
1742     huffyuvdsp
1743     huffyuvencdsp
1744     idctdsp
1745     iirfilter
1746     imdct15
1747     intrax8
1748     iso_media
1749     ividsp
1750     jpegtables
1751     libx262
1752     lgplv3
1753     lpc
1754     lzf
1755     me_cmp
1756     mpeg_er
1757     mpegaudio
1758     mpegaudiodsp
1759     mpegaudioheader
1760     mpegvideo
1761     mpegvideoenc
1762     mss34dsp
1763     pixblockdsp
1764     qpeldsp
1765     qsv
1766     qsvdec
1767     qsvenc
1768     rangecoder
1769     riffdec
1770     riffenc
1771     rtpdec
1772     rtpenc_chain
1773     rv34dsp
1774     sinewin
1775     snappy
1776     srtp
1777     startcode
1778     texturedsp
1779     texturedspenc
1780     tpeldsp
1781     vaapi_encode
1782     vc1dsp
1783     videodsp
1784     vp3dsp
1785     vp56dsp
1786     vp8dsp
1787     wma_freqs
1788     wmv2dsp
1789 "
1790
1791 CMDLINE_SELECT="
1792     $ARCH_EXT_LIST
1793     $CONFIG_LIST
1794     $HAVE_LIST_CMDLINE
1795     $THREADS_LIST
1796     asm
1797     cross_compile
1798     debug
1799     extra_warnings
1800     logging
1801     lto
1802     optimizations
1803     rpath
1804 "
1805
1806 PATHS_LIST="
1807     bindir
1808     datadir
1809     docdir
1810     incdir
1811     libdir
1812     mandir
1813     prefix
1814     shlibdir
1815 "
1816
1817 CMDLINE_SET="
1818     $PATHS_LIST
1819     ar
1820     arch
1821     as
1822     cc
1823     objcc
1824     cpu
1825     cross_prefix
1826     custom_allocator
1827     dep_cc
1828     env
1829     extra_version
1830     host_cc
1831     host_cflags
1832     host_extralibs
1833     host_ld
1834     host_ldflags
1835     host_os
1836     ignore_tests
1837     ld
1838     logfile
1839     malloc_prefix
1840     nm
1841     optflags
1842     pkg_config
1843     pkg_config_flags
1844     random_seed
1845     samples
1846     sysinclude
1847     sysroot
1848     target_exec
1849     target_os
1850     target_path
1851     target_samples
1852     toolchain
1853 "
1854
1855 CMDLINE_APPEND="
1856     extra_cflags
1857     extra_objcflags
1858     host_cppflags
1859 "
1860
1861 # code dependency declarations
1862
1863 # architecture extensions
1864
1865 armv5te_deps="arm"
1866 armv6_deps="arm"
1867 armv6t2_deps="arm"
1868 armv8_deps="aarch64"
1869 neon_deps_any="aarch64 arm"
1870 intrinsics_neon_deps="neon"
1871 vfp_deps_any="aarch64 arm"
1872 vfpv3_deps="vfp"
1873
1874 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1875
1876 altivec_deps="ppc"
1877 ppc4xx_deps="ppc"
1878 vsx_deps="altivec"
1879 power8_deps="vsx"
1880
1881 cpunop_deps="i686"
1882 x86_64_select="i686"
1883 x86_64_suggest="fast_cmov"
1884
1885 amd3dnow_deps="mmx"
1886 amd3dnowext_deps="amd3dnow"
1887 i686_deps="x86"
1888 mmx_deps="x86"
1889 mmxext_deps="mmx"
1890 sse_deps="mmxext"
1891 sse2_deps="sse"
1892 sse3_deps="sse2"
1893 ssse3_deps="sse3"
1894 sse4_deps="ssse3"
1895 sse42_deps="sse4"
1896 avx_deps="sse42"
1897 xop_deps="avx"
1898 fma3_deps="avx"
1899 fma4_deps="avx"
1900 avx2_deps="avx"
1901
1902 mmx_external_deps="yasm"
1903 mmx_inline_deps="inline_asm"
1904 mmx_suggest="mmx_external mmx_inline"
1905
1906 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1907     eval dep=\$${ext}_deps
1908     eval ${ext}_external_deps='"${dep}_external"'
1909     eval ${ext}_inline_deps='"${dep}_inline"'
1910     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1911 done
1912
1913 aligned_stack_if_any="aarch64 ppc x86"
1914 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1915 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1916 fast_unaligned_if_any="aarch64 ppc x86"
1917 simd_align_16_if_any="altivec neon sse"
1918 simd_align_32_if_any="avx"
1919
1920 # system capabilities
1921 symver_if_any="symver_asm_label symver_gnu_asm"
1922 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1923
1924 # threading support
1925 atomics_gcc_if="sync_val_compare_and_swap"
1926 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1927 atomics_win32_if="MemoryBarrier"
1928 atomics_native_if_any="$ATOMICS_LIST"
1929 w32threads_deps="atomics_native"
1930 threads_if_any="$THREADS_LIST"
1931
1932 # subsystems
1933 dct_select="rdft"
1934 dirac_parse_select="golomb"
1935 error_resilience_select="me_cmp"
1936 faandct_deps="faan fdctdsp"
1937 faanidct_deps="faan idctdsp"
1938 h264dsp_select="startcode"
1939 hevc_ps_select="golomb"
1940 intrax8_select="blockdsp idctdsp"
1941 mdct_select="fft"
1942 rdft_select="fft"
1943 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1944 mpeg_er_select="error_resilience"
1945 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1946 mpegaudiodsp_select="dct"
1947 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1948 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1949 vc1dsp_select="h264chroma qpeldsp startcode"
1950
1951 # decoders / encoders
1952 aac_decoder_select="imdct15 mdct sinewin"
1953 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1954 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1955 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1956 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1957 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1958 adpcm_g722_decoder_select="g722dsp"
1959 adpcm_g722_encoder_select="g722dsp"
1960 aic_decoder_select="golomb idctdsp"
1961 alac_encoder_select="lpc"
1962 als_decoder_select="bswapdsp"
1963 amrnb_decoder_select="lsp"
1964 amrwb_decoder_select="lsp"
1965 amv_decoder_select="sp5x_decoder"
1966 ape_decoder_select="bswapdsp"
1967 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1968 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1969 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1970 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1971 atrac1_decoder_select="mdct sinewin"
1972 atrac3_decoder_select="mdct"
1973 atrac3p_decoder_select="mdct sinewin"
1974 bink_decoder_select="blockdsp hpeldsp"
1975 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1976 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1977 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1978 cllc_decoder_select="bswapdsp"
1979 comfortnoise_encoder_select="lpc"
1980 cook_decoder_select="audiodsp mdct sinewin"
1981 cscd_decoder_select="lzo"
1982 cscd_decoder_suggest="zlib"
1983 dca_decoder_select="fmtconvert mdct"
1984 dds_decoder_select="texturedsp"
1985 dnxhd_decoder_select="blockdsp idctdsp"
1986 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1987 dvvideo_decoder_select="dvprofile idctdsp"
1988 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1989 dxa_decoder_deps="zlib"
1990 dxv_decoder_select="lzf texturedsp"
1991 eac3_decoder_select="ac3_decoder"
1992 eac3_encoder_select="ac3_encoder"
1993 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1994 eatgq_decoder_select="aandcttables idctdsp"
1995 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1996 exr_decoder_deps="zlib"
1997 ffv1_decoder_select="rangecoder"
1998 ffv1_encoder_select="rangecoder"
1999 ffvhuff_decoder_select="huffyuv_decoder"
2000 ffvhuff_encoder_select="huffyuv_encoder"
2001 fic_decoder_select="golomb"
2002 flac_decoder_select="flacdsp"
2003 flac_encoder_select="bswapdsp flacdsp lpc"
2004 flashsv_decoder_deps="zlib"
2005 flashsv_encoder_deps="zlib"
2006 flashsv2_decoder_deps="zlib"
2007 flv_decoder_select="h263_decoder"
2008 flv_encoder_select="h263_encoder"
2009 fourxm_decoder_select="blockdsp bswapdsp"
2010 fraps_decoder_select="bswapdsp huffman"
2011 g2m_decoder_deps="zlib"
2012 g2m_decoder_select="blockdsp idctdsp jpegtables"
2013 h261_decoder_select="mpeg_er mpegvideo"
2014 h261_encoder_select="aandcttables mpegvideoenc"
2015 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2016 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2017 h263i_decoder_select="h263_decoder"
2018 h263p_encoder_select="h263_encoder"
2019 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2020 h264_decoder_suggest="error_resilience"
2021 hap_decoder_select="snappy texturedsp"
2022 hap_encoder_deps="libsnappy"
2023 hap_encoder_select="texturedspenc"
2024 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2025 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2026 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2027 iac_decoder_select="imc_decoder"
2028 imc_decoder_select="bswapdsp fft mdct sinewin"
2029 indeo3_decoder_select="hpeldsp"
2030 indeo4_decoder_select="ividsp"
2031 indeo5_decoder_select="ividsp"
2032 interplay_video_decoder_select="hpeldsp"
2033 jpegls_decoder_select="mjpeg_decoder"
2034 jv_decoder_select="blockdsp"
2035 lagarith_decoder_select="huffyuvdsp"
2036 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2037 magicyuv_decoder_select="huffyuvdsp"
2038 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2039 metasound_decoder_select="lsp mdct sinewin"
2040 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2041 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2042 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2043 mjpegb_decoder_select="mjpeg_decoder"
2044 mlp_decoder_select="mlp_parser"
2045 motionpixels_decoder_select="bswapdsp"
2046 mp1_decoder_select="mpegaudio"
2047 mp1float_decoder_select="mpegaudio"
2048 mp2_decoder_select="mpegaudio"
2049 mp2float_decoder_select="mpegaudio"
2050 mp3_decoder_select="mpegaudio"
2051 mp3adu_decoder_select="mpegaudio"
2052 mp3adufloat_decoder_select="mpegaudio"
2053 mp3float_decoder_select="mpegaudio"
2054 mp3on4_decoder_select="mpegaudio"
2055 mp3on4float_decoder_select="mpegaudio"
2056 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2057 mpc8_decoder_select="mpegaudiodsp"
2058 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2059 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2060 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2061 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2062 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2063 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2064 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2065 mpeg4_encoder_select="h263_encoder"
2066 msa1_decoder_select="mss34dsp"
2067 msmpeg4v1_decoder_select="h263_decoder"
2068 msmpeg4v2_decoder_select="h263_decoder"
2069 msmpeg4v2_encoder_select="h263_encoder"
2070 msmpeg4v3_decoder_select="h263_decoder"
2071 msmpeg4v3_encoder_select="h263_encoder"
2072 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2073 mts2_decoder_select="mss34dsp"
2074 mxpeg_decoder_select="mjpeg_decoder"
2075 nellymoser_decoder_select="mdct sinewin"
2076 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2077 nuv_decoder_select="idctdsp lzo"
2078 on2avc_decoder_select="mdct"
2079 opus_decoder_deps="avresample"
2080 opus_decoder_select="imdct15"
2081 png_decoder_deps="zlib"
2082 png_encoder_deps="zlib"
2083 png_encoder_select="huffyuvencdsp"
2084 prores_decoder_select="idctdsp"
2085 prores_encoder_select="fdctdsp"
2086 qcelp_decoder_select="lsp"
2087 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2088 ra_144_encoder_select="audio_frame_queue lpc"
2089 ralf_decoder_select="golomb"
2090 rscc_decoder_deps="zlib"
2091 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2092 rv10_encoder_select="h263_encoder"
2093 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2094 rv20_encoder_select="h263_encoder"
2095 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2096 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2097 screenpresso_decoder_deps="zlib"
2098 sipr_decoder_select="lsp"
2099 sp5x_decoder_select="mjpeg_decoder"
2100 svq1_decoder_select="hpeldsp"
2101 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2102 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2103 svq3_decoder_suggest="zlib"
2104 tak_decoder_select="audiodsp"
2105 tdsc_decoder_deps="zlib"
2106 tdsc_decoder_select="mjpeg_decoder"
2107 theora_decoder_select="vp3_decoder"
2108 thp_decoder_select="mjpeg_decoder"
2109 tiff_decoder_suggest="zlib"
2110 tiff_encoder_suggest="zlib"
2111 truehd_decoder_select="mlp_decoder"
2112 truemotion2_decoder_select="bswapdsp"
2113 truespeech_decoder_select="bswapdsp"
2114 tscc_decoder_deps="zlib"
2115 txd_decoder_select="texturedsp"
2116 twinvq_decoder_select="mdct lsp sinewin"
2117 utvideo_decoder_select="bswapdsp"
2118 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2119 vble_decoder_select="huffyuvdsp"
2120 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2121 vc1image_decoder_select="vc1_decoder"
2122 vorbis_decoder_select="mdct"
2123 vorbis_encoder_select="mdct"
2124 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2125 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2126 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2127 vp6a_decoder_select="vp6_decoder"
2128 vp6f_decoder_select="vp6_decoder"
2129 vp7_decoder_select="h264pred videodsp vp8dsp"
2130 vp8_decoder_select="h264pred videodsp vp8dsp"
2131 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2132 webp_decoder_select="vp8_decoder"
2133 wmapro_decoder_select="mdct sinewin wma_freqs"
2134 wmav1_decoder_select="mdct sinewin wma_freqs"
2135 wmav1_encoder_select="mdct sinewin wma_freqs"
2136 wmav2_decoder_select="mdct sinewin wma_freqs"
2137 wmav2_encoder_select="mdct sinewin wma_freqs"
2138 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2139 wmv1_decoder_select="h263_decoder"
2140 wmv1_encoder_select="h263_encoder"
2141 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2142 wmv2_encoder_select="h263_encoder wmv2dsp"
2143 wmv3_decoder_select="vc1_decoder"
2144 wmv3image_decoder_select="wmv3_decoder"
2145 zerocodec_decoder_deps="zlib"
2146 zlib_decoder_deps="zlib"
2147 zlib_encoder_deps="zlib"
2148 zmbv_decoder_deps="zlib"
2149 zmbv_encoder_deps="zlib"
2150
2151 # hardware accelerators
2152 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2153 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2154 dxva2_lib_deps="dxva2"
2155 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2156 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2157
2158 h263_vaapi_hwaccel_deps="vaapi"
2159 h263_vaapi_hwaccel_select="h263_decoder"
2160 h264_d3d11va_hwaccel_deps="d3d11va"
2161 h264_d3d11va_hwaccel_select="h264_decoder"
2162 h264_dxva2_hwaccel_deps="dxva2"
2163 h264_dxva2_hwaccel_select="h264_decoder"
2164 h264_mmal_hwaccel_deps="mmal"
2165 h264_qsv_hwaccel_deps="libmfx"
2166 h264_vaapi_hwaccel_deps="vaapi"
2167 h264_vaapi_hwaccel_select="h264_decoder"
2168 h264_vda_hwaccel_deps="vda"
2169 h264_vda_hwaccel_select="h264_decoder"
2170 h264_vda_old_hwaccel_deps="vda"
2171 h264_vda_old_hwaccel_select="h264_decoder"
2172 h264_vdpau_hwaccel_deps="vdpau"
2173 h264_vdpau_hwaccel_select="h264_decoder"
2174 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2175 hevc_d3d11va_hwaccel_select="hevc_decoder"
2176 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2177 hevc_dxva2_hwaccel_select="hevc_decoder"
2178 hevc_qsv_hwaccel_deps="libmfx"
2179 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2180 hevc_vaapi_hwaccel_select="hevc_decoder"
2181 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2182 hevc_vdpau_hwaccel_select="hevc_decoder"
2183 mpeg1_vdpau_hwaccel_deps="vdpau"
2184 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2185 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2186 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2187 mpeg2_dxva2_hwaccel_deps="dxva2"
2188 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2189 mpeg2_mmal_hwaccel_deps="mmal"
2190 mpeg2_qsv_hwaccel_deps="libmfx"
2191 mpeg2_vaapi_hwaccel_deps="vaapi"
2192 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2193 mpeg2_vdpau_hwaccel_deps="vdpau"
2194 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2195 mpeg4_vaapi_hwaccel_deps="vaapi"
2196 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2197 mpeg4_vdpau_hwaccel_deps="vdpau"
2198 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2199 vc1_d3d11va_hwaccel_deps="d3d11va"
2200 vc1_d3d11va_hwaccel_select="vc1_decoder"
2201 vc1_dxva2_hwaccel_deps="dxva2"
2202 vc1_dxva2_hwaccel_select="vc1_decoder"
2203 vc1_mmal_hwaccel_deps="mmal"
2204 vc1_qsv_hwaccel_deps="libmfx"
2205 vc1_vaapi_hwaccel_deps="vaapi"
2206 vc1_vaapi_hwaccel_select="vc1_decoder"
2207 vc1_vdpau_hwaccel_deps="vdpau"
2208 vc1_vdpau_hwaccel_select="vc1_decoder"
2209 vp8_qsv_hwaccel_deps="libmfx"
2210 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2211 vp8_vaapi_hwaccel_select="vp8_decoder"
2212 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2213 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2214 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2215 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2216
2217 # hardware-accelerated codecs
2218 nvenc_deps_any="dlopen LoadLibrary"
2219 nvenc_extralibs='$ldl'
2220 omx_deps="dlopen pthreads"
2221 omx_extralibs='$ldl'
2222 omx_rpi_select="omx"
2223 qsvdec_select="qsv"
2224 qsvenc_select="qsv"
2225 vaapi_encode_deps="vaapi"
2226
2227 hwupload_cuda_filter_deps="cuda"
2228 scale_npp_filter_deps="cuda libnpp"
2229
2230 h264_mmal_decoder_deps="mmal"
2231 h264_nvenc_encoder_deps="nvenc"
2232 h264_omx_encoder_deps="omx"
2233 h264_qsv_decoder_deps="libmfx"
2234 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2235 h264_qsv_encoder_deps="libmfx"
2236 h264_qsv_encoder_select="qsvenc"
2237 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2238 h264_vaapi_encoder_select="vaapi_encode golomb"
2239 hevc_nvenc_encoder_deps="nvenc"
2240 hevc_qsv_decoder_deps="libmfx"
2241 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2242 hevc_qsv_encoder_deps="libmfx"
2243 hevc_qsv_encoder_select="hevc_ps qsvenc"
2244 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2245 hevc_vaapi_encoder_select="vaapi_encode golomb"
2246 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2247 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2248 mpeg2_mmal_decoder_deps="mmal"
2249 mpeg2_qsv_decoder_deps="libmfx"
2250 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2251 mpeg2_qsv_encoder_deps="libmfx"
2252 mpeg2_qsv_encoder_select="qsvenc"
2253 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2254 mpeg2_vaapi_encoder_select="vaapi_encode"
2255 mpeg4_omx_encoder_deps="omx"
2256 vc1_mmal_decoder_deps="mmal"
2257 vc1_qsv_decoder_deps="libmfx"
2258 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2259 vp8_qsv_decoder_deps="libmfx"
2260 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2261 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2262 vp8_vaapi_encoder_select="vaapi_encode"
2263
2264 nvenc_h264_encoder_select="h264_nvenc_encoder"
2265 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2266
2267 # parsers
2268 h264_parser_select="golomb h264dsp h264parse"
2269 hevc_parser_select="hevc_ps"
2270 mpegaudio_parser_select="mpegaudioheader"
2271 mpegvideo_parser_select="mpegvideo"
2272 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2273 vc1_parser_select="vc1dsp"
2274
2275 # bitstream_filters
2276 mjpeg2jpeg_bsf_select="jpegtables"
2277
2278 # external libraries
2279 avisynth_deps="LoadLibrary"
2280 avxsynth_deps="dlopen"
2281 avisynth_demuxer_deps_any="avisynth avxsynth"
2282 avisynth_demuxer_select="riffdec"
2283 libdcadec_decoder_deps="libdcadec"
2284 libfaac_encoder_deps="libfaac"
2285 libfaac_encoder_select="audio_frame_queue"
2286 libfdk_aac_decoder_deps="libfdk_aac"
2287 libfdk_aac_encoder_deps="libfdk_aac"
2288 libfdk_aac_encoder_select="audio_frame_queue"
2289 libgsm_decoder_deps="libgsm"
2290 libgsm_encoder_deps="libgsm"
2291 libgsm_ms_decoder_deps="libgsm"
2292 libgsm_ms_encoder_deps="libgsm"
2293 libilbc_decoder_deps="libilbc"
2294 libilbc_encoder_deps="libilbc"
2295 libkvazaar_encoder_deps="libkvazaar"
2296 libmp3lame_encoder_deps="libmp3lame"
2297 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2298 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2299 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2300 libopencore_amrnb_encoder_select="audio_frame_queue"
2301 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2302 libopenh264_decoder_deps="libopenh264"
2303 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2304 libopenh264_encoder_deps="libopenh264"
2305 libopenjpeg_decoder_deps="libopenjpeg"
2306 libopenjpeg_encoder_deps="libopenjpeg"
2307 libopus_decoder_deps="libopus"
2308 libopus_encoder_deps="libopus"
2309 libopus_encoder_select="audio_frame_queue"
2310 libschroedinger_decoder_deps="libschroedinger"
2311 libschroedinger_encoder_deps="libschroedinger"
2312 libspeex_decoder_deps="libspeex"
2313 libspeex_encoder_deps="libspeex"
2314 libspeex_encoder_select="audio_frame_queue"
2315 libtheora_encoder_deps="libtheora"
2316 libtwolame_encoder_deps="libtwolame"
2317 libvo_aacenc_encoder_deps="libvo_aacenc"
2318 libvo_aacenc_encoder_select="audio_frame_queue"
2319 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2320 libvorbis_encoder_deps="libvorbis"
2321 libvorbis_encoder_select="audio_frame_queue"
2322 libvpx_vp8_decoder_deps="libvpx"
2323 libvpx_vp8_encoder_deps="libvpx"
2324 libvpx_vp9_decoder_deps="libvpx"
2325 libvpx_vp9_encoder_deps="libvpx"
2326 libwavpack_encoder_deps="libwavpack"
2327 libwavpack_encoder_select="audio_frame_queue"
2328 libwebp_encoder_deps="libwebp"
2329 libx262_encoder_deps="libx262"
2330 libx264_encoder_deps="libx264"
2331 libx265_encoder_deps="libx265"
2332 libxavs_encoder_deps="libxavs"
2333 libxvid_encoder_deps="libxvid mkstemp"
2334
2335 # demuxers / muxers
2336 ac3_demuxer_select="ac3_parser"
2337 asf_demuxer_select="riffdec"
2338 asf_muxer_select="riffenc"
2339 asf_stream_muxer_select="asf_muxer"
2340 avi_demuxer_select="iso_media riffdec"
2341 avi_muxer_select="riffenc"
2342 caf_demuxer_select="iso_media riffdec"
2343 dash_muxer_select="mp4_muxer"
2344 dirac_demuxer_select="dirac_parser"
2345 dv_demuxer_select="dvprofile"
2346 dv_muxer_select="dvprofile"
2347 dxa_demuxer_select="riffdec"
2348 eac3_demuxer_select="ac3_parser"
2349 f4v_muxer_select="mov_muxer"
2350 flac_demuxer_select="flac_parser"
2351 hds_muxer_select="flv_muxer"
2352 hls_muxer_select="mpegts_muxer"
2353 ipod_muxer_select="mov_muxer"
2354 ismv_muxer_select="mov_muxer"
2355 matroska_audio_muxer_select="matroska_muxer"
2356 matroska_demuxer_select="iso_media riffdec"
2357 matroska_demuxer_suggest="bzlib lzo zlib"
2358 matroska_muxer_select="iso_media riffenc"
2359 mmf_muxer_select="riffenc"
2360 mov_demuxer_select="iso_media riffdec"
2361 mov_demuxer_suggest="zlib"
2362 mov_muxer_select="iso_media riffenc rtpenc_chain"
2363 mp3_demuxer_select="mpegaudio_parser"
2364 mp3_muxer_select="mpegaudioheader"
2365 mp4_muxer_select="mov_muxer"
2366 mpegts_demuxer_select="iso_media"
2367 mpegts_muxer_select="adts_muxer latm_muxer"
2368 mpegtsraw_demuxer_select="mpegts_demuxer"
2369 mxf_d10_muxer_select="mxf_muxer"
2370 nut_muxer_select="riffenc"
2371 nuv_demuxer_select="riffdec"
2372 oga_muxer_select="ogg_muxer"
2373 ogg_demuxer_select="dirac_parse"
2374 opus_muxer_select="ogg_muxer"
2375 psp_muxer_select="mov_muxer"
2376 rtp_demuxer_select="sdp_demuxer"
2377 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2378 rtsp_demuxer_select="http_protocol rtpdec"
2379 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2380 sap_demuxer_select="sdp_demuxer"
2381 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2382 sdp_demuxer_select="rtpdec"
2383 smoothstreaming_muxer_select="ismv_muxer"
2384 spdif_muxer_select="aac_parser"
2385 spx_muxer_select="ogg_muxer"
2386 swf_demuxer_suggest="zlib"
2387 tak_demuxer_select="tak_parser"
2388 tg2_muxer_select="mov_muxer"
2389 tgp_muxer_select="mov_muxer"
2390 w64_demuxer_select="wav_demuxer"
2391 wav_demuxer_select="riffdec"
2392 wav_muxer_select="riffenc"
2393 webm_muxer_select="iso_media riffenc"
2394 wtv_demuxer_select="mpegts_demuxer riffdec"
2395 xmv_demuxer_select="riffdec"
2396 xwma_demuxer_select="riffdec"
2397
2398 # indevs / outdevs
2399 alsa_indev_deps="alsa"
2400 alsa_outdev_deps="alsa"
2401 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2402 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2403 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2404 dv1394_indev_deps="dv1394"
2405 dv1394_indev_select="dv_demuxer"
2406 fbdev_indev_deps="linux_fb_h"
2407 jack_indev_deps="jack"
2408 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2409 libcdio_indev_deps="libcdio"
2410 libdc1394_indev_deps="libdc1394"
2411 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2412 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2413 pulse_indev_deps="libpulse"
2414 sndio_indev_deps="sndio"
2415 sndio_outdev_deps="sndio"
2416 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2417 vfwcap_indev_deps="vfw32 vfwcap_defines"
2418 xcbgrab_indev_deps="libxcb"
2419 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2420
2421 # protocols
2422 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2423 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2424 ffrtmpcrypt_protocol_select="tcp_protocol"
2425 ffrtmphttp_protocol_deps="!librtmp_protocol"
2426 ffrtmphttp_protocol_select="http_protocol"
2427 gopher_protocol_select="network"
2428 http_protocol_select="tcp_protocol"
2429 httpproxy_protocol_select="tcp_protocol"
2430 https_protocol_select="tls_protocol"
2431 icecast_protocol_select="http_protocol"
2432 librtmp_protocol_deps="librtmp"
2433 librtmpe_protocol_deps="librtmp"
2434 librtmps_protocol_deps="librtmp"
2435 librtmpt_protocol_deps="librtmp"
2436 librtmpte_protocol_deps="librtmp"
2437 mmsh_protocol_select="http_protocol"
2438 mmst_protocol_select="network"
2439 rtmp_protocol_deps="!librtmp_protocol"
2440 rtmp_protocol_select="tcp_protocol"
2441 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2442 rtmps_protocol_deps="!librtmp_protocol"
2443 rtmps_protocol_select="tls_protocol"
2444 rtmpt_protocol_select="ffrtmphttp_protocol"
2445 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2446 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2447 rtp_protocol_select="udp_protocol"
2448 sctp_protocol_deps="struct_sctp_event_subscribe"
2449 sctp_protocol_select="network"
2450 srtp_protocol_select="rtp_protocol srtp"
2451 tcp_protocol_select="network"
2452 tls_gnutls_protocol_deps="gnutls"
2453 tls_gnutls_protocol_select="tcp_protocol"
2454 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2455 tls_openssl_protocol_select="tcp_protocol"
2456 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2457 udp_protocol_select="network"
2458 unix_protocol_deps="sys_un_h"
2459 unix_protocol_select="network"
2460
2461 # filters
2462 asyncts_filter_deps="avresample"
2463 blackframe_filter_deps="gpl"
2464 boxblur_filter_deps="gpl"
2465 bs2b_filter_deps="libbs2b"
2466 cropdetect_filter_deps="gpl"
2467 deinterlace_qsv_filter_deps="libmfx"
2468 deinterlace_vaapi_filter_deps="vaapi"
2469 delogo_filter_deps="gpl"
2470 drawtext_filter_deps="libfreetype"
2471 drawtext_filter_suggest="libfontconfig"
2472 frei0r_filter_deps="frei0r dlopen"
2473 frei0r_filter_extralibs='$ldl'
2474 frei0r_src_filter_deps="frei0r dlopen"
2475 frei0r_src_filter_extralibs='$ldl'
2476 hdcd_filter_deps="libhdcd"
2477 hqdn3d_filter_deps="gpl"
2478 interlace_filter_deps="gpl"
2479 movie_filter_deps="avcodec avformat"
2480 ocv_filter_deps="libopencv"
2481 resample_filter_deps="avresample"
2482 scale_filter_deps="swscale"
2483 scale_qsv_filter_deps="libmfx"
2484 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2485
2486 # examples
2487 decode_audio_example_deps="avcodec avutil"
2488 decode_video_example_deps="avcodec avutil"
2489 encode_audio_example_deps="avcodec avutil"
2490 encode_video_example_deps="avcodec avutil"
2491 filter_audio_example_deps="avfilter avutil"
2492 metadata_example_deps="avformat avutil"
2493 output_example_deps="avcodec avformat avresample avutil swscale"
2494 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2495 transcode_aac_example_deps="avcodec avformat avresample"
2496
2497 # libraries, in linking order
2498 avcodec_deps="avutil"
2499 avcodec_select="null_bsf"
2500 avdevice_deps="avformat avcodec avutil"
2501 avfilter_deps="avutil"
2502 avformat_deps="avcodec avutil"
2503 avformat_suggest="network"
2504 avresample_deps="avutil"
2505 swscale_deps="avutil"
2506
2507 # programs
2508 avconv_deps="avcodec avfilter avformat avresample swscale"
2509 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2510                fps_filter null_filter resample_filter scale_filter
2511                trim_filter"
2512 avplay_deps="avcodec avfilter avformat avresample sdl"
2513 avplay_extralibs='$sdl_extralibs'
2514 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2515 avprobe_deps="avcodec avformat"
2516
2517 # documentation
2518 pod2man_deps="doc"
2519 texi2html_deps="doc"
2520
2521 # default parameters
2522
2523 logfile="avbuild/config.log"
2524
2525 # installation paths
2526 prefix_default="/usr/local"
2527 bindir_default='${prefix}/bin'
2528 datadir_default='${prefix}/share/avconv'
2529 docdir_default='${prefix}/share/doc/libav'
2530 incdir_default='${prefix}/include'
2531 libdir_default='${prefix}/lib'
2532 mandir_default='${prefix}/share/man'
2533 shlibdir_default="$libdir_default"
2534
2535 # toolchain
2536 ar_default="ar"
2537 cc_default="gcc"
2538 host_cc_default="gcc"
2539 ln_s="ln -s -f"
2540 nm_default="nm -g"
2541 objformat="elf"
2542 pkg_config_default=pkg-config
2543 ranlib="ranlib"
2544 strip="strip"
2545 version_script='--version-script'
2546 yasmexe="yasm"
2547
2548 # machine
2549 arch_default=$(uname -m)
2550 cpu="generic"
2551 intrinsics="none"
2552
2553 # OS
2554 target_os_default=$(tolower $(uname -s))
2555 host_os=$target_os_default
2556
2557 # configurable options
2558 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2559
2560 enable asm
2561 enable debug
2562 enable doc
2563 enable faan faandct faanidct
2564 enable optimizations
2565 enable safe_bitstream_reader
2566 enable static
2567 enable swscale_alpha
2568 enable valgrind_backtrace
2569
2570 # By default, enable only those hwaccels that have no external dependencies.
2571 enable d3d11va dxva2 vda vdpau
2572
2573 # build settings
2574 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2575 LIBPREF="lib"
2576 LIBSUF=".a"
2577 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2578 SLIBPREF="lib"
2579 SLIBSUF=".so"
2580 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2581 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2582 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2583 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2584 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2585 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2586 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2587
2588 asflags_filter=echo
2589 cflags_filter=echo
2590 ldflags_filter=echo
2591
2592 AS_C='-c'
2593 AS_O='-o $@'
2594 CC_C='-c'
2595 CC_E='-E -o $@'
2596 CC_O='-o $@'
2597 OBJCC_C='-c'
2598 OBJCC_E='-E -o $@'
2599 OBJCC_O='-o $@'
2600 LD_O='-o $@'
2601 LD_LIB='-l%'
2602 LD_PATH='-L'
2603 HOSTCC_C='-c'
2604 HOSTCC_E='-E -o $@'
2605 HOSTCC_O='-o $@'
2606 HOSTLD_O='-o $@'
2607
2608 host_extralibs='-lm'
2609 host_cflags_filter=echo
2610 host_ldflags_filter=echo
2611
2612 target_path='$(CURDIR)'
2613
2614 # since the object filename is not given with the -MM flag, the compiler
2615 # is only able to print the basename, and we must add the path ourselves
2616 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2617 DEPFLAGS='-MM'
2618
2619 # find source path
2620 if test -f configure; then
2621     source_path=.
2622 else
2623     source_path=$(cd $(dirname "$0"); pwd)
2624     echo "$source_path" | grep -q '[[:blank:]]' &&
2625         die "Out of tree builds are impossible with whitespace in source path."
2626     test -e "$source_path/config.h" &&
2627         die "Out of tree builds are impossible with config.h in source dir."
2628 fi
2629
2630 for v in "$@"; do
2631     r=${v#*=}
2632     l=${v%"$r"}
2633     r=$(sh_quote "$r")
2634     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2635 done
2636
2637 find_things(){
2638     thing=$1
2639     pattern=$2
2640     file=$source_path/$3
2641     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2642 }
2643
2644 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2645 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2646 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2647 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2648 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2649 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2650 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2651 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2652 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2653
2654 find_things_extern(){
2655     thing=$1
2656     pattern=$2
2657     file=$source_path/$3
2658     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2659 }
2660
2661 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2662 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2663
2664 ALL_COMPONENTS="
2665     $BSF_LIST
2666     $DECODER_LIST
2667     $DEMUXER_LIST
2668     $ENCODER_LIST
2669     $FILTER_LIST
2670     $HWACCEL_LIST
2671     $INDEV_LIST
2672     $MUXER_LIST
2673     $OUTDEV_LIST
2674     $PARSER_LIST
2675     $PROTOCOL_LIST
2676 "
2677
2678 for n in $COMPONENT_LIST; do
2679     v=$(toupper ${n%s})_LIST
2680     eval enable \$$v
2681     eval ${n}_if_any="\$$v"
2682 done
2683
2684 enable $ARCH_EXT_LIST
2685
2686 die_unknown(){
2687     echo "Unknown option \"$1\"."
2688     echo "See $0 --help for available options."
2689     exit 1
2690 }
2691
2692 print_3_columns() {
2693     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2694 }
2695
2696 show_list() {
2697     suffix=_$1
2698     shift
2699     echo $* | sed s/$suffix//g | print_3_columns
2700     exit 0
2701 }
2702
2703 rand_list(){
2704     IFS=', '
2705     set -- $*
2706     unset IFS
2707     for thing; do
2708         comp=${thing%:*}
2709         prob=${thing#$comp}
2710         prob=${prob#:}
2711         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2712         echo "prob ${prob:-0.5}"
2713         printf '%s\n' $comp
2714     done
2715 }
2716
2717 do_random(){
2718     action=$1
2719     shift
2720     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2721     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2722 }
2723
2724 for opt do
2725     optval="${opt#*=}"
2726     case "$opt" in
2727         --extra-ldflags=*)
2728             add_ldflags $optval
2729         ;;
2730         --extra-ldexeflags=*)
2731             add_ldexeflags $optval
2732         ;;
2733         --extra-libs=*)
2734             add_extralibs $optval
2735         ;;
2736         --disable-devices)
2737             disable $INDEV_LIST $OUTDEV_LIST
2738         ;;
2739         --enable-debug=*)
2740             debuglevel="$optval"
2741         ;;
2742         --disable-programs)
2743             disable $PROGRAM_LIST
2744         ;;
2745         --disable-everything)
2746             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2747         ;;
2748         --disable-all)
2749             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2750             disable $LIBRARY_LIST $PROGRAM_LIST doc
2751         ;;
2752         --enable-random|--disable-random)
2753             action=${opt%%-random}
2754             do_random ${action#--} $COMPONENT_LIST
2755         ;;
2756         --enable-random=*|--disable-random=*)
2757             action=${opt%%-random=*}
2758             do_random ${action#--} $optval
2759         ;;
2760         --enable-*=*|--disable-*=*)
2761             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2762             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2763             eval list=\$$(toupper $thing)_LIST
2764             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2765             $action $(filter "$name" $list)
2766         ;;
2767         --enable-avserver|--disable-avserver*)
2768             warn "avserver has been removed, the ${opt} option is only"\
2769                  "provided for compatibility and will be removed in the future"
2770         ;;
2771         --enable-?*|--disable-?*)
2772             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2773             if is_in $option $COMPONENT_LIST; then
2774                 test $action = disable && action=unset
2775                 eval $action \$$(toupper ${option%s})_LIST
2776             elif is_in $option $CMDLINE_SELECT; then
2777                 $action $option
2778             else
2779                 die_unknown $opt
2780             fi
2781         ;;
2782         --list-*)
2783             NAME="${opt#--list-}"
2784             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2785             NAME=${NAME%s}
2786             eval show_list $NAME \$$(toupper $NAME)_LIST
2787         ;;
2788         --help|-h) show_help
2789         ;;
2790         --quiet|-q) quiet=yes
2791         ;;
2792         *)
2793             optname="${opt%%=*}"
2794             optname="${optname#--}"
2795             optname=$(echo "$optname" | sed 's/-/_/g')
2796             if is_in $optname $CMDLINE_SET; then
2797                 eval $optname='$optval'
2798             elif is_in $optname $CMDLINE_APPEND; then
2799                 append $optname "$optval"
2800             else
2801                 die_unknown $opt
2802             fi
2803         ;;
2804     esac
2805 done
2806
2807 for e in $env; do
2808     eval "export $e"
2809 done
2810
2811 disabled logging && logfile=/dev/null
2812
2813 # Die early if licensing-related configure options are incompatible.
2814 die_license_disabled() {
2815     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2816 }
2817
2818 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2819 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2820 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2821
2822 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2823
2824 # Disable all the library-specific components if the library itself
2825 # is disabled, see AVCODEC_LIST and following _LIST variables.
2826
2827 disable_components(){
2828     disabled ${1} && disable $(
2829         eval components="\$$(toupper ${1})_COMPONENTS"
2830         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2831     )
2832 }
2833
2834 map 'disable_components $v' $LIBRARY_LIST
2835
2836 mkdir -p avbuild
2837 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2838 set >> $logfile
2839
2840 case "$toolchain" in
2841     *-asan)
2842         cc_default="${toolchain%-asan}"
2843         add_cflags  -fsanitize=address
2844         add_ldflags -fsanitize=address
2845     ;;
2846     *-msan)
2847         cc_default="${toolchain%-msan}"
2848         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2849         add_ldflags -fsanitize=memory
2850     ;;
2851     *-tsan)
2852         cc_default="${toolchain%-tsan}"
2853         add_cflags  -fsanitize=thread -fPIE
2854         add_ldflags -fsanitize=thread -pie
2855         case "$toolchain" in
2856             gcc-tsan)
2857                 add_cflags  -fPIC
2858                 add_ldflags -fPIC
2859                 ;;
2860         esac
2861     ;;
2862     *-usan)
2863         cc_default="${toolchain%-usan}"
2864         add_cflags  -fsanitize=undefined
2865         add_ldflags -fsanitize=undefined
2866         case "$toolchain" in
2867             clang-usan)
2868                 add_cflags -O1
2869                 ;;
2870         esac
2871     ;;
2872     valgrind-*)
2873         target_exec_default="valgrind"
2874         case "$toolchain" in
2875             valgrind-massif)
2876                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2877                 ;;
2878             valgrind-memcheck)
2879                 target_exec_args="--track-origins=yes --leak-check=full"
2880                 ;;
2881         esac
2882     ;;
2883     msvc)
2884         # Check whether the current MSVC version needs the C99 converter.
2885         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2886         # support enough of C99 to build libav. Default to the new
2887         # behaviour if the regexp was unable to match anything, since this
2888         # successfully parses the version number of existing supported
2889         # versions that require the converter (MSVC 2010 and 2012).
2890         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2891         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2892             cc_default="cl"
2893         else
2894             cc_default="c99wrap cl"
2895         fi
2896         ld_default="$source_path/compat/windows/mslink"
2897         nm_default="dumpbin -symbols"
2898         ar_default="lib"
2899         case "$arch" in
2900         arm*)
2901             as_default="armasm"
2902             ;;
2903         esac
2904         target_os_default="win32"
2905         # Use a relative path for TMPDIR. This makes sure all the
2906         # ffconf temp files are written with a relative path, avoiding
2907         # issues with msys/win32 path conversion for MSVC parameters
2908         # such as -Fo<file> or -out:<file>.
2909         TMPDIR=.
2910     ;;
2911     icl)
2912         cc_default="icl"
2913         ld_default="xilink"
2914         nm_default="dumpbin -symbols"
2915         ar_default="xilib"
2916         target_os_default="win32"
2917         TMPDIR=.
2918     ;;
2919     gcov)
2920         add_cflags  -fprofile-arcs -ftest-coverage
2921         add_ldflags -fprofile-arcs -ftest-coverage
2922     ;;
2923     llvm-cov)
2924         add_cflags -fprofile-arcs -ftest-coverage
2925         add_ldflags --coverage
2926     ;;
2927     hardened)
2928         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2929         add_cflags   -fno-strict-overflow -fstack-protector-all
2930         add_ldflags  -Wl,-z,relro -Wl,-z,now
2931     ;;
2932     ?*)
2933         die "Unknown toolchain $toolchain"
2934     ;;
2935 esac
2936
2937 test -n "$cross_prefix" && enable cross_compile
2938
2939 if enabled cross_compile; then
2940     test -n "$arch" && test -n "$target_os" ||
2941         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2942 fi
2943
2944 ar_default="${cross_prefix}${ar_default}"
2945 cc_default="${cross_prefix}${cc_default}"
2946 occ_default="${cross_prefix}${occ_default}"
2947 nm_default="${cross_prefix}${nm_default}"
2948 pkg_config_default="${cross_prefix}${pkg_config_default}"
2949 ranlib="${cross_prefix}${ranlib}"
2950 strip="${cross_prefix}${strip}"
2951
2952 sysinclude_default="${sysroot}/usr/include"
2953
2954 set_default arch cc pkg_config sysinclude target_exec target_os
2955 enabled cross_compile || host_cc_default=$cc
2956 set_default host_cc
2957
2958 if ! $pkg_config --version >/dev/null 2>&1; then
2959     warn "$pkg_config not found, library detection may fail."
2960     pkg_config=false
2961 fi
2962
2963 exesuf() {
2964     case $1 in
2965         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2966     esac
2967 }
2968
2969 EXESUF=$(exesuf $target_os)
2970 HOSTEXESUF=$(exesuf $host_os)
2971
2972 # set temporary file name
2973 : ${TMPDIR:=$TEMPDIR}
2974 : ${TMPDIR:=$TMP}
2975 : ${TMPDIR:=/tmp}
2976
2977 if ! check_cmd mktemp -u XXXXXX; then
2978     # simple replacement for missing mktemp
2979     # NOT SAFE FOR GENERAL USE
2980     mktemp(){
2981         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2982         echo "$tmpname"
2983         mkdir "$tmpname"
2984     }
2985 fi
2986
2987 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
2988     die "Unable to create temporary directory in $TMPDIR."
2989
2990 tmpfile(){
2991     tmp="${AVTMPDIR}/test"$2
2992     (set -C; exec > $tmp) 2> /dev/null ||
2993         die "Unable to create temporary file in $AVTMPDIR."
2994     eval $1=$tmp
2995 }
2996
2997 trap 'rm -rf -- "$AVTMPDIR"' EXIT
2998 trap 'exit 2' INT
2999
3000 tmpfile TMPASM .asm
3001 tmpfile TMPC   .c
3002 tmpfile TMPE   $EXESUF
3003 tmpfile TMPH   .h
3004 tmpfile TMPO   .o
3005 tmpfile TMPS   .S
3006 tmpfile TMPSH  .sh
3007 tmpfile TMPV   .ver
3008
3009 unset -f mktemp
3010
3011 chmod +x $TMPE
3012
3013 # make sure we can execute files in $TMPDIR
3014 cat > $TMPSH 2>> $logfile <<EOF
3015 #! /bin/sh
3016 EOF
3017 chmod +x $TMPSH >> $logfile 2>&1
3018 if ! $TMPSH >> $logfile 2>&1; then
3019     cat <<EOF
3020 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3021 variable to another directory and make sure that it is not mounted noexec.
3022 EOF
3023     die "Sanity test failed."
3024 fi
3025
3026 armasm_flags(){
3027     for flag; do
3028         case $flag in
3029             # Filter out MSVC cl.exe options from cflags that shouldn't
3030             # be passed to gas-preprocessor
3031             -M[TD]*)                                            ;;
3032             *)                  echo $flag                      ;;
3033         esac
3034    done
3035 }
3036
3037 ccc_flags(){
3038     for flag; do
3039         case $flag in
3040             -std=c99)           echo -c99                       ;;
3041             -mcpu=*)            echo -arch ${flag#*=}           ;;
3042             -mieee)             echo -ieee                      ;;
3043             -O*|-fast)          echo $flag                      ;;
3044             -fno-math-errno)    echo -assume nomath_errno       ;;
3045             -g)                 echo -g3                        ;;
3046             -Wall)              echo -msg_enable level2         ;;
3047             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3048             -Wl,*)              echo $flag                      ;;
3049             -f*|-W*)                                            ;;
3050             *)                  echo $flag                      ;;
3051         esac
3052    done
3053 }
3054
3055 cparser_flags(){
3056     for flag; do
3057         case $flag in
3058             -Wno-switch)             echo -Wno-switch-enum ;;
3059             -Wno-format-zero-length) ;;
3060             -Wdisabled-optimization) ;;
3061             -Wno-pointer-sign)       echo -Wno-other ;;
3062             *)                       echo $flag ;;
3063         esac
3064     done
3065 }
3066
3067 msvc_common_flags(){
3068     for flag; do
3069         case $flag in
3070             # In addition to specifying certain flags under the compiler
3071             # specific filters, they must be specified here as well or else the
3072             # generic catch all at the bottom will print the original flag.
3073             -Wall)                ;;
3074             -Wextra)              ;;
3075             -std=c99)             ;;
3076             # Common flags
3077             -fomit-frame-pointer) ;;
3078             -g)                   echo -Z7 ;;
3079             -fno-math-errno)      ;;
3080             -fno-common)          ;;
3081             -fno-signed-zeros)    ;;
3082             -fPIC)                ;;
3083             -mthumb)              ;;
3084             -march=*)             ;;
3085             -lz)                  echo zlib.lib ;;
3086             -lx264)               echo libx264.lib ;;
3087             -l*)                  echo ${flag#-l}.lib ;;
3088             -L*)                  echo -libpath:${flag#-L} ;;
3089             *)                    echo $flag ;;
3090         esac
3091     done
3092 }
3093
3094 msvc_flags(){
3095     msvc_common_flags "$@"
3096     for flag; do
3097         case $flag in
3098             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3099                                        -wd4554 ;;
3100             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3101                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3102                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3103                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3104         esac
3105     done
3106 }
3107
3108 icl_flags(){
3109     msvc_common_flags "$@"
3110     for flag; do
3111         case $flag in
3112             # Despite what Intel's documentation says -Wall, which is supported
3113             # on Windows, does enable remarks so disable them here.
3114             -Wall)                echo $flag -Qdiag-disable:remark ;;
3115             -std=c99)             echo -Qstd=c99 ;;
3116         esac
3117     done
3118 }
3119
3120 pgi_flags(){
3121     for flag; do
3122         case $flag in
3123             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3124             -fomit-frame-pointer) echo -Mnoframe ;;
3125             -g)                   echo -gopt ;;
3126             *)                    echo $flag ;;
3127         esac
3128     done
3129 }
3130
3131 suncc_flags(){
3132     for flag; do
3133         case $flag in
3134             -march=*|-mcpu=*)
3135                 case "${flag#*=}" in
3136                     native)                   echo -xtarget=native       ;;
3137                     v9|niagara)               echo -xarch=sparc          ;;
3138                     ultrasparc)               echo -xarch=sparcvis       ;;
3139                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3140                     i586|pentium)             echo -xchip=pentium        ;;
3141                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3142                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3143                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3144                     pentium4*)          echo -xtarget=pentium4           ;;
3145                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3146                     *-sse3)             echo -xarch=sse3                 ;;
3147                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3148                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3149                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3150                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3151                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3152                     k8|opteron|athlon64|athlon-fx)
3153                                                echo -xarch=sse2a         ;;
3154                     athlon*)                   echo -xarch=pentium_proa  ;;
3155                 esac
3156                 ;;
3157             -std=c99)             echo -xc99              ;;
3158             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3159             -fPIC)                echo -KPIC -xcode=pic32 ;;
3160             -W*,*)                echo $flag              ;;
3161             -f*-*|-W*|-mimpure-text)                      ;;
3162             -shared)              echo -G                 ;;
3163             *)                    echo $flag              ;;
3164         esac
3165     done
3166 }
3167
3168 tms470_flags(){
3169     for flag; do
3170         case $flag in
3171             -march=*|-mcpu=*)
3172                 case "${flag#*=}" in
3173                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3174                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3175                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3176                     armv6*|arm11*)          echo -mv=6   ;;
3177                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3178                                             echo -mv=5e  ;;
3179                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3180                 esac
3181                 ;;
3182             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3183             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3184             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3185             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3186             -msoft-float)   echo --float_support=vfplib       ;;
3187             -O[0-3]|-mf=*)  echo $flag                        ;;
3188             -g)             echo -g -mn                       ;;
3189             -pds=*)         echo $flag                        ;;
3190             -D*|-I*)        echo $flag                        ;;
3191             --gcc|--abi=*)  echo $flag                        ;;
3192             -me)            echo $flag                        ;;
3193         esac
3194     done
3195 }
3196
3197 probe_cc(){
3198     pfx=$1
3199     _cc=$2
3200
3201     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3202     unset _ld_o _ldflags _ld_lib _ld_path
3203     unset _depflags _DEPCMD _DEPFLAGS
3204     _flags_filter=echo
3205
3206     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3207         _type=llvm_gcc
3208         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3209         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3210         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3211         _cflags_speed='-O3'
3212         _cflags_size='-Os'
3213     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3214         _type=gcc
3215         gcc_version=$($_cc --version | head -n1)
3216         gcc_basever=$($_cc -dumpversion)
3217         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3218         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3219         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3220         if ! $_cc -dumpversion | grep -q '^2\.'; then
3221             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3222         fi
3223         _cflags_speed='-O3'
3224         _cflags_size='-Os'
3225     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3226         _type=icc
3227         _ident=$($_cc --version | head -n1)
3228         _depflags='-MMD'
3229         _cflags_speed='-O3'
3230         _cflags_size='-Os'
3231         _cflags_noopt='-O1'
3232     elif $_cc -v 2>&1 | grep -q xlc; then
3233         _type=xlc
3234         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3235         _cflags_speed='-O5'
3236         _cflags_size='-O5 -qcompact'
3237     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3238         _type=ccc
3239         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3240         _DEPFLAGS='-M'
3241         _cflags_speed='-fast'
3242         _cflags_size='-O1'
3243         _flags_filter=ccc_flags
3244     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3245         test -d "$sysroot" || die "No valid sysroot specified."
3246         _type=armcc
3247         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3248         armcc_conf="$PWD/armcc.conf"
3249         $_cc --arm_linux_configure                 \
3250              --arm_linux_config_file="$armcc_conf" \
3251              --configure_sysroot="$sysroot"        \
3252              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3253              die "Error creating armcc configuration file."
3254         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3255         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3256         as_default="${cross_prefix}gcc"
3257         _depflags='-MMD'
3258         _cflags_speed='-O3'
3259         _cflags_size='-Os'
3260     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3261         _type=tms470
3262         _ident=$($_cc -version | head -n1 | tr -s ' ')
3263         _flags='--gcc --abi=eabi -me'
3264         _cc_e='-ppl -fe=$@'
3265         _cc_o='-fe=$@'
3266         _depflags='-ppa -ppd=$(@:.o=.d)'
3267         _cflags_speed='-O3 -mf=5'
3268         _cflags_size='-O3 -mf=2'
3269         _flags_filter=tms470_flags
3270     elif $_cc -v 2>&1 | grep -q clang; then
3271         _type=clang
3272         _ident=$($_cc --version 2>/dev/null | head -n1)
3273         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3274         _cflags_speed='-O3'
3275         _cflags_size='-Os'
3276     elif $_cc -V 2>&1 | grep -q Sun; then
3277         _type=suncc
3278         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3279         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3280         _DEPFLAGS='-xM1 -xc99'
3281         _ldflags='-std=c99'
3282         _cflags_speed='-O5'
3283         _cflags_size='-O5 -xspace'
3284         _flags_filter=suncc_flags
3285     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3286         _type=pathscale
3287         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3288         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3289         _cflags_speed='-O2'
3290         _cflags_size='-Os'
3291         _flags_filter='filter_out -Wdisabled-optimization'
3292     elif $_cc -v 2>&1 | grep -q Open64; then
3293         _type=open64
3294         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3295         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3296         _cflags_speed='-O2'
3297         _cflags_size='-Os'
3298         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3299     elif $_cc -V 2>&1 | grep -q Portland; then
3300         _type=pgi
3301         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3302         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3303         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3304         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3305         _cflags_noopt="-O1"
3306         _flags_filter=pgi_flags
3307     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3308         _type=armasm
3309         _ident=$($_cc | head -n1)
3310         # 4509: "This form of conditional instruction is deprecated"
3311         _flags="-nologo -ignore 4509"
3312         _flags_filter=armasm_flags
3313     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3314         _type=msvc
3315         _ident=$($_cc 2>&1 | head -n1)
3316         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3317         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3318         _cflags_speed="-O2"
3319         _cflags_size="-O1"
3320         _cflags_noopt="-O1"
3321         if $_cc -nologo- 2>&1 | grep -q Linker; then
3322             _ld_o='-out:$@'
3323         else
3324             _ld_o='-Fe$@'
3325         fi
3326         _cc_o='-Fo$@'
3327         _cc_e='-P -Fi$@'
3328         _flags_filter=msvc_flags
3329         _ld_lib='lib%.a'
3330         _ld_path='-libpath:'
3331         _flags='-nologo'
3332     elif $_cc 2>&1 | grep -q Intel; then
3333         _type=icl
3334         _ident=$($_cc 2>&1 | head -n1)
3335         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3336         # Not only is O3 broken on 13.x+ but it is slower on all previous
3337         # versions (tested) as well.
3338         _cflags_speed="-O2"
3339         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3340         if $_cc 2>&1 | grep -q Linker; then
3341             _ld_o='-out:$@'
3342         else
3343             _ld_o='-Fe$@'
3344         fi
3345         _cc_o='-Fo$@'
3346         _cc_e='-P'
3347         _flags_filter=icl_flags
3348         _ld_lib='lib%.a'
3349         _ld_path='-libpath:'
3350         # -Qdiag-error to make icl error when seeing certain unknown arguments
3351         _flags='-nologo -Qdiag-error:4044,10157'
3352         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3353         # with MSVC which enables it by default.
3354         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3355     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3356         # lld can emulate multiple different linkers; in ms link.exe mode,
3357         # the -? parameter gives the help output which contains an identifyable
3358         # string, while it gives an error in other modes.
3359         _type=lld-link
3360         # The link.exe mode doesn't have a switch for getting the version,
3361         # but we can force it back to gnu mode and get the version from there.
3362         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3363         _ld_o='-out:$@'
3364         _flags_filter=msvc_flags
3365         _ld_lib='lib%.a'
3366         _ld_path='-libpath:'
3367     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3368         _type=cparser
3369         _ident=$($_cc --version | head -n1)
3370         _depflags='-MMD'
3371         _cflags_speed='-O4'
3372         _cflags_size='-O2'
3373         _flags_filter=cparser_flags
3374     fi
3375
3376     eval ${pfx}_type=\$_type
3377     eval ${pfx}_ident=\$_ident
3378 }
3379
3380 set_ccvars(){
3381     eval ${1}_C=\${_cc_c-\${${1}_C}}
3382     eval ${1}_E=\${_cc_e-\${${1}_E}}
3383     eval ${1}_O=\${_cc_o-\${${1}_O}}
3384
3385     if [ -n "$_depflags" ]; then
3386         eval ${1}_DEPFLAGS=\$_depflags
3387     else
3388         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3389         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3390         eval DEP${1}FLAGS=\$_flags
3391     fi
3392 }
3393
3394 probe_cc cc "$cc"
3395 cflags_filter=$_flags_filter
3396 cflags_speed=$_cflags_speed
3397 cflags_size=$_cflags_size
3398 cflags_noopt=$_cflags_noopt
3399 add_cflags $_flags $_cflags
3400 cc_ldflags=$_ldflags
3401 set_ccvars CC
3402
3403 probe_cc hostcc "$host_cc"
3404 host_cflags_filter=$_flags_filter
3405 host_cflags_speed=$_cflags_speed
3406 add_host_cflags  $_flags $_cflags
3407 set_ccvars HOSTCC
3408
3409 test -n "$cc_type" && enable $cc_type ||
3410     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3411
3412 : ${as_default:=$cc}
3413 : ${objcc_default:=$cc}
3414 : ${dep_cc_default:=$cc}
3415 : ${ld_default:=$cc}
3416 : ${host_ld_default:=$host_cc}
3417 set_default ar as objcc dep_cc ld host_ld
3418
3419 probe_cc as "$as"
3420 asflags_filter=$_flags_filter
3421 add_asflags $_flags $_cflags
3422 set_ccvars AS
3423
3424 probe_cc objcc "$objcc"
3425 objcflags_filter=$_flags_filter
3426 add_objcflags $_flags $_cflags
3427 set_ccvars OBJC
3428
3429 probe_cc ld "$ld"
3430 ldflags_filter=$_flags_filter
3431 add_ldflags $_flags $_ldflags
3432 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3433 LD_O=${_ld_o-$LD_O}
3434 LD_LIB=${_ld_lib-$LD_LIB}
3435 LD_PATH=${_ld_path-$LD_PATH}
3436
3437 probe_cc hostld "$host_ld"
3438 host_ldflags_filter=$_flags_filter
3439 add_host_ldflags $_flags $_ldflags
3440 HOSTLD_O=${_ld_o-$HOSTLD_O}
3441
3442 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3443     probe_cc depcc "$dep_cc"
3444     CCDEP=${_DEPCMD:-$DEPCMD}
3445     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3446     DEPCCFLAGS=$_flags
3447 fi
3448
3449 if $ar 2>&1 | grep -q Microsoft; then
3450     arflags="-nologo"
3451     ar_o='-out:$@'
3452 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3453     arflags="rq"
3454     ar_o='$@'
3455 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3456     arflags='-Xany -r -c'
3457     ar_o='$@'
3458 else
3459     arflags="rc"
3460     ar_o='$@'
3461 fi
3462
3463 add_cflags $extra_cflags
3464 add_objcflags $extra_objcflags
3465 add_asflags $extra_cflags
3466
3467 if test -n "$sysroot"; then
3468     case "$cc_type" in
3469         gcc|llvm_gcc|clang)
3470             add_cppflags --sysroot="$sysroot"
3471             add_ldflags --sysroot="$sysroot"
3472         ;;
3473         tms470)
3474             add_cppflags -I"$sysinclude"
3475             add_ldflags  --sysroot="$sysroot"
3476         ;;
3477     esac
3478 fi
3479
3480 if test "$cpu" = host; then
3481     enabled cross_compile &&
3482         die "--cpu=host makes no sense when cross-compiling."
3483
3484     case "$cc_type" in
3485         gcc|llvm_gcc)
3486             check_native(){
3487                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3488                 sed -n "/cc1.*$1=/{
3489                             s/.*$1=\\([^ ]*\\).*/\\1/
3490                             p
3491                             q
3492                         }" $TMPE
3493             }
3494             cpu=$(check_native -march || check_native -mcpu)
3495         ;;
3496     esac
3497
3498     test "${cpu:-host}" = host &&
3499         die "--cpu=host not supported with compiler $cc"
3500 fi
3501
3502 # Deal with common $arch aliases
3503 case "$arch" in
3504     aarch64|arm64)
3505         arch="aarch64"
3506     ;;
3507     arm*)
3508         arch="arm"
3509     ;;
3510     mips*|IP*)
3511         case "$arch" in
3512         *el)
3513             add_cppflags -EL
3514             add_ldflags -EL
3515         ;;
3516         *eb)
3517             add_cppflags -EB
3518             add_ldflags -EB
3519         ;;
3520         esac
3521         arch="mips"
3522     ;;
3523     parisc*|hppa*)
3524         arch="parisc"
3525     ;;
3526     "Power Macintosh"|ppc*|powerpc*)
3527         arch="ppc"
3528     ;;
3529     s390|s390x)
3530         arch="s390"
3531     ;;
3532     sh4|sh)
3533         arch="sh4"
3534     ;;
3535     sun4u|sparc*)
3536         arch="sparc"
3537     ;;
3538     tilegx|tile-gx)
3539         arch="tilegx"
3540     ;;
3541     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3542         arch="x86"
3543     ;;
3544 esac
3545
3546 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3547 enable $arch
3548
3549 # Add processor-specific flags
3550 if enabled aarch64; then
3551
3552     case $cpu in
3553         armv*)
3554             cpuflags="-march=$cpu"
3555         ;;
3556         *)
3557             cpuflags="-mcpu=$cpu"
3558         ;;
3559     esac
3560
3561 elif enabled alpha; then
3562
3563     cpuflags="-mcpu=$cpu"
3564
3565 elif enabled arm; then
3566
3567     check_arm_arch() {
3568         check_cpp_condition stddef.h \
3569             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3570             $cpuflags
3571     }
3572
3573     probe_arm_arch() {
3574         if   check_arm_arch 4;        then echo armv4
3575         elif check_arm_arch 4T;       then echo armv4t
3576         elif check_arm_arch 5;        then echo armv5
3577         elif check_arm_arch 5E;       then echo armv5e
3578         elif check_arm_arch 5T;       then echo armv5t
3579         elif check_arm_arch 5TE;      then echo armv5te
3580         elif check_arm_arch 5TEJ;     then echo armv5te
3581         elif check_arm_arch 6;        then echo armv6
3582         elif check_arm_arch 6J;       then echo armv6j
3583         elif check_arm_arch 6K;       then echo armv6k
3584         elif check_arm_arch 6Z;       then echo armv6z
3585         elif check_arm_arch 6ZK;      then echo armv6zk
3586         elif check_arm_arch 6T2;      then echo armv6t2
3587         elif check_arm_arch 7;        then echo armv7
3588         elif check_arm_arch 7A  7_A;  then echo armv7-a
3589         elif check_arm_arch 7S;       then echo armv7-a
3590         elif check_arm_arch 7R  7_R;  then echo armv7-r
3591         elif check_arm_arch 7M  7_M;  then echo armv7-m
3592         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3593         elif check_arm_arch 8A  8_A;  then echo armv8-a
3594         fi
3595     }
3596
3597     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3598
3599     case $cpu in
3600         armv*)
3601             cpuflags="-march=$cpu"
3602             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3603         ;;
3604         *)
3605             cpuflags="-mcpu=$cpu"
3606             case $cpu in
3607                 cortex-a*)                               subarch=armv7a  ;;
3608                 cortex-r*)                               subarch=armv7r  ;;
3609                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3610                 arm11*)                                  subarch=armv6   ;;
3611                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3612                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3613                 *)                             subarch=$(probe_arm_arch) ;;
3614             esac
3615         ;;
3616     esac
3617
3618     case "$subarch" in
3619         armv5t*)    enable fast_clz                ;;
3620         armv[6-8]*) enable fast_clz fast_unaligned ;;
3621     esac
3622
3623 elif enabled avr32; then
3624
3625     case $cpu in
3626         ap7[02]0[0-2])
3627             subarch="avr32_ap"
3628             cpuflags="-mpart=$cpu"
3629         ;;
3630         ap)
3631             subarch="avr32_ap"
3632             cpuflags="-march=$cpu"
3633         ;;
3634         uc3[ab]*)
3635             subarch="avr32_uc"
3636             cpuflags="-mcpu=$cpu"
3637         ;;
3638         uc)
3639             subarch="avr32_uc"
3640             cpuflags="-march=$cpu"
3641         ;;
3642     esac
3643
3644 elif enabled bfin; then
3645
3646     cpuflags="-mcpu=$cpu"
3647
3648 elif enabled mips; then
3649
3650     cpuflags="-march=$cpu"
3651
3652 elif enabled ppc; then
3653
3654     disable ldbrx
3655
3656     case $(tolower $cpu) in
3657         601|ppc601|powerpc601)
3658             cpuflags="-mcpu=601"
3659             disable altivec
3660         ;;
3661         603*|ppc603*|powerpc603*)
3662             cpuflags="-mcpu=603"
3663             disable altivec
3664         ;;
3665         604*|ppc604*|powerpc604*)
3666             cpuflags="-mcpu=604"
3667             disable altivec
3668         ;;
3669         g3|75*|ppc75*|powerpc75*)
3670             cpuflags="-mcpu=750"
3671             disable altivec
3672         ;;
3673         g4|745*|ppc745*|powerpc745*)
3674             cpuflags="-mcpu=7450"
3675             disable vsx
3676         ;;
3677         74*|ppc74*|powerpc74*)
3678             cpuflags="-mcpu=7400"
3679             disable vsx
3680         ;;
3681         g5|970|ppc970|powerpc970)
3682             cpuflags="-mcpu=970"
3683             disable vsx
3684         ;;
3685         power[3-6]*)
3686             cpuflags="-mcpu=$cpu"
3687             disable vsx
3688         ;;
3689         power[7-8]*)
3690             cpuflags="-mcpu=$cpu"
3691             enable ldbrx
3692         ;;
3693         cell)
3694             cpuflags="-mcpu=cell"
3695             enable ldbrx
3696             disable vsx
3697         ;;
3698         e500mc)
3699             cpuflags="-mcpu=e500mc"
3700             disable altivec
3701         ;;
3702         e500v2)
3703             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3704             disable altivec
3705             disable dcbzl
3706         ;;
3707         e500)
3708             cpuflags="-mcpu=8540 -mhard-float"
3709             disable altivec
3710             disable dcbzl
3711         ;;
3712     esac
3713
3714 elif enabled sparc; then
3715
3716     case $cpu in
3717         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3718             cpuflags="-mcpu=$cpu"
3719         ;;
3720         ultrasparc*|niagara[234])
3721             cpuflags="-mcpu=$cpu"
3722         ;;
3723     esac
3724
3725 elif enabled x86; then
3726
3727     case $cpu in
3728         i[345]86|pentium)
3729             cpuflags="-march=$cpu"
3730             disable i686
3731             disable mmx
3732         ;;
3733         # targets that do NOT support nopl and conditional mov (cmov)
3734         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3735             cpuflags="-march=$cpu"
3736             disable i686
3737         ;;
3738         # targets that do support nopl and conditional mov (cmov)
3739         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3740             cpuflags="-march=$cpu"
3741             enable i686
3742             enable fast_cmov
3743         ;;
3744         # targets that do support conditional mov but on which it's slow
3745         pentium4|pentium4m|prescott|nocona)
3746             cpuflags="-march=$cpu"
3747             enable i686
3748             disable fast_cmov
3749         ;;
3750     esac
3751
3752 fi
3753
3754 if [ "$cpu" != generic ]; then
3755     add_cflags  $cpuflags
3756     add_asflags $cpuflags
3757     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3758 fi
3759
3760 # compiler sanity check
3761 check_exec <<EOF
3762 int main(void){ return 0; }
3763 EOF
3764 if test "$?" != 0; then
3765     echo "$cc is unable to create an executable file."
3766     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3767         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3768         echo "Only do this if you know what cross compiling means."
3769     fi
3770     die "C compiler test failed."
3771 fi
3772
3773 add_cppflags -D_ISOC99_SOURCE
3774
3775 # some compilers silently accept -std=c11, so we also need to check that the
3776 # version macro is defined properly
3777 if test_cflags_cpp -std=c11 "__STDC_VERSION__ >= 201112L"; then
3778     add_cflags -std=c11
3779 else
3780     check_cflags -std=c99
3781 fi
3782
3783 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3784 #include <stdlib.h>
3785 EOF
3786 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3787 #include <stdlib.h>
3788 EOF
3789
3790 add_host_cppflags -D_ISOC99_SOURCE
3791 check_host_cflags -std=c99
3792 check_host_cflags -Wall
3793 check_host_cflags $host_cflags_speed
3794
3795 check_64bit(){
3796     arch32=$1
3797     arch64=$2
3798     expr=$3
3799     check_code cc "" "int test[2*($expr) - 1]" &&
3800         subarch=$arch64 || subarch=$arch32
3801 }
3802
3803 case "$arch" in
3804     aarch64|alpha|ia64)
3805         spic=$shared
3806     ;;
3807     mips)
3808         check_64bit mips mips64 '_MIPS_SIM > 1'
3809         spic=$shared
3810     ;;
3811     parisc)
3812         check_64bit parisc parisc64 'sizeof(void *) > 4'
3813         spic=$shared
3814     ;;
3815     ppc)
3816         check_64bit ppc ppc64 'sizeof(void *) > 4'
3817         spic=$shared
3818     ;;
3819     s390)
3820         check_64bit s390 s390x 'sizeof(void *) > 4'
3821         spic=$shared
3822     ;;
3823     sparc)
3824         check_64bit sparc sparc64 'sizeof(void *) > 4'
3825         spic=$shared
3826     ;;
3827     x86)
3828         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3829         if test "$subarch" = "x86_64"; then
3830             spic=$shared
3831         fi
3832     ;;
3833 esac
3834
3835 enable $subarch
3836 enabled spic && enable_weak pic
3837
3838 # OS specific
3839 case $target_os in
3840     aix)
3841         SHFLAGS=-shared
3842         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3843         enabled shared && add_ldflags -Wl,-brtl
3844         ;;
3845     android)
3846         disable symver
3847         enable section_data_rel_ro
3848         SLIB_INSTALL_NAME='$(SLIBNAME)'
3849         SLIB_INSTALL_LINKS=
3850         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3851         ;;
3852     haiku)
3853         prefix_default="/boot/common"
3854         network_extralibs="-lnetwork"
3855         host_extralibs=
3856         ;;
3857     sunos)
3858         SHFLAGS='-shared -Wl,-h,$$(@F)'
3859         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3860         network_extralibs="-lsocket -lnsl"
3861         # When using suncc to build, the Solaris linker will mark
3862         # an executable with each instruction set encountered by
3863         # the Solaris assembler.  As our libraries contain their own
3864         # guards for processor-specific code, instead suppress
3865         # generation of the HWCAPS ELF section on Solaris x86 only.
3866         enabled_all suncc x86 &&
3867             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3868             add_ldflags -Wl,-M,mapfile
3869         nm_default='nm -P -g'
3870         version_script='-M'
3871         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3872         ;;
3873     netbsd)
3874         disable symver
3875         oss_indev_extralibs="-lossaudio"
3876         oss_outdev_extralibs="-lossaudio"
3877         ;;
3878     openbsd|bitrig)
3879         disable symver
3880         SHFLAGS='-shared'
3881         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3882         SLIB_INSTALL_LINKS=
3883         oss_indev_extralibs="-lossaudio"
3884         oss_outdev_extralibs="-lossaudio"
3885         ;;
3886     dragonfly)
3887         disable symver
3888         ;;
3889     freebsd)
3890         ;;
3891     bsd/os)
3892         add_extralibs -lpoll -lgnugetopt
3893         ;;
3894     darwin)
3895         enabled ppc && add_asflags -force_cpusubtype_ALL
3896         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3897         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3898         add_ldflags -Wl,-dynamic,-search_paths_first
3899         SLIBSUF=".dylib"
3900         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3901         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3902         objformat="macho"
3903         enabled x86_64 && objformat="macho64"
3904         enabled_any pic shared ||
3905             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3906         check_header dispatch/dispatch.h &&
3907             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3908         ;;
3909     msys*)
3910         die "Native MSYS builds are discouraged, please use the MINGW environment."
3911         ;;
3912     mingw32*|mingw64*)
3913         if test $target_os = "mingw32ce"; then
3914             disable network
3915         else
3916             target_os=mingw32
3917         fi
3918         LIBTARGET=i386
3919         if enabled x86_64; then
3920             LIBTARGET="i386:x86-64"
3921         elif enabled arm; then
3922             LIBTARGET=arm-wince
3923         fi
3924         check_ldflags -Wl,--nxcompat
3925         check_ldflags -Wl,--dynamicbase
3926         shlibdir_default="$bindir_default"
3927         SLIBPREF=""
3928         SLIBSUF=".dll"
3929         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3930         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3931         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3932         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3933         SLIB_INSTALL_LINKS=
3934         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3935         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3936         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3937         objformat="win32"
3938         dlltool="${cross_prefix}dlltool"
3939         ranlib=:
3940         enable dos_paths
3941         ;;
3942     win32|win64)
3943         disable symver
3944         if enabled shared; then
3945             # Link to the import library instead of the normal static library
3946             # for shared libs.
3947             LD_LIB='%.lib'
3948             # Cannot build both shared and static libs with MSVC or icl.
3949             disable static
3950         fi
3951         shlibdir_default="$bindir_default"
3952         SLIBPREF=""
3953         SLIBSUF=".dll"
3954         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3955         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3956         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3957         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3958         SLIB_INSTALL_LINKS=
3959         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3960         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3961         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3962         objformat="win32"
3963         ranlib=:
3964         enable dos_paths
3965         ;;
3966     cygwin*)
3967         target_os=cygwin
3968         shlibdir_default="$bindir_default"
3969         SLIBPREF="cyg"
3970         SLIBSUF=".dll"
3971         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3972         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3973         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3974         SLIB_INSTALL_LINKS=
3975         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3976         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3977         objformat="win32"
3978         enable dos_paths
3979         ;;
3980     *-dos|freedos|opendos)
3981         network_extralibs="-lsocket"
3982         objformat="coff"
3983         enable dos_paths
3984         add_cppflags -U__STRICT_ANSI__
3985         ;;
3986     linux)
3987         enable dv1394
3988         enable section_data_rel_ro
3989         ;;
3990     irix*)
3991         target_os=irix
3992         ranlib="echo ignoring ranlib"
3993         ;;
3994     os/2*)
3995         ln_s="cp -f"
3996         objformat="aout"
3997         add_cppflags -D_GNU_SOURCE
3998         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
3999         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4000         LIBSUF="_s.a"
4001         SLIBPREF=""
4002         SLIBSUF=".dll"
4003         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4004         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4005         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4006             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4007             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4008             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4009             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
4010         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4011             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4012         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4013         enable dos_paths
4014         ;;
4015     gnu/kfreebsd)
4016         add_cppflags -D_BSD_SOURCE
4017         ;;
4018     gnu)
4019         ;;
4020     qnx)
4021         add_cppflags -D_QNX_SOURCE
4022         network_extralibs="-lsocket"
4023         ;;
4024     symbian)
4025         SLIBSUF=".dll"
4026         enable dos_paths
4027         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4028         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4029         add_ldflags -Wl,--target1-abs,--no-undefined \
4030                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4031                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4032         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4033                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4034                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4035         ;;
4036     osf1)
4037         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4038         ;;
4039     minix)
4040         ;;
4041     none)
4042         ;;
4043     *)
4044         die "Unknown OS '$target_os'."
4045         ;;
4046 esac
4047
4048 # determine libc flavour
4049
4050 probe_libc(){
4051     pfx=$1
4052     pfx_no_=${pfx%_}
4053     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4054     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4055         eval ${pfx}libc_type=uclibc
4056         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4057     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4058         eval ${pfx}libc_type=glibc
4059         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4060     # MinGW headers can be installed on Cygwin, so check for newlib first.
4061     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4062         eval ${pfx}libc_type=newlib
4063         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4064     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4065     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4066         eval ${pfx}libc_type=mingw64
4067         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4068         eval test \$${pfx_no_}cc_type = "gcc" &&
4069             add_${pfx}cppflags -D__printf__=__gnu_printf__
4070     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4071          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4072         eval ${pfx}libc_type=mingw32
4073         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4074             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4075             die "ERROR: MinGW32 runtime version must be >= 3.15."
4076         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4077         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4078             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4079         eval test \$${pfx_no_}cc_type = "gcc" &&
4080             add_${pfx}cppflags -D__printf__=__gnu_printf__
4081     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4082         eval ${pfx}libc_type=msvcrt
4083         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4084             if [ "$pfx" = host_ ]; then
4085                 add_host_cppflags -Dsnprintf=_snprintf
4086             else
4087                 add_compat strtod.o strtod=avpriv_strtod
4088                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4089                                              _snprintf=avpriv_snprintf  \
4090                                              vsnprintf=avpriv_vsnprintf
4091             fi
4092         fi
4093         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4094         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4095         # 0x601 by default unless something else is set by the user.
4096         # This can easily lead to us detecting functions only present
4097         # in such new versions and producing binaries requiring windows 7.0.
4098         # Therefore explicitly set the default to XP unless the user has
4099         # set something else on the command line.
4100         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4101         # family. For these cases, configure is free to use any functions
4102         # found in the SDK headers by default. (Alternatively, we could force
4103         # _WIN32_WINNT to 0x0602 in that case.)
4104         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4105             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4106 #ifdef WINAPI_FAMILY
4107 #include <winapifamily.h>
4108 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4109 #error not desktop
4110 #endif
4111 #endif
4112 EOF
4113         if [ "$pfx" = "" ]; then
4114             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4115         fi
4116     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4117         eval ${pfx}libc_type=klibc
4118     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4119         eval ${pfx}libc_type=bionic
4120     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4121         eval ${pfx}libc_type=solaris
4122         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4123     else
4124         eval ${pfx}libc_type=default
4125         add_${pfx}cppflags -D_DEFAULT_SOURCE
4126     fi
4127 }
4128
4129 probe_libc
4130 test -n "$libc_type" && enable libc_$libc_type
4131 probe_libc host_
4132 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4133
4134 # hacks for compiler/libc/os combinations
4135
4136 case $libc_type in
4137     bionic)
4138         add_compat strtod.o strtod=avpriv_strtod
4139         ;;
4140     glibc)
4141         if enabled tms470; then
4142             CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4143             add_cppflags -D__USER_LABEL_PREFIX__=
4144             add_cppflags -D__builtin_memset=memset
4145             add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4146             add_cflags   -pds=48    # incompatible redefinition of macro
4147         elif enabled ccc; then
4148             add_ldflags -Wl,-z,now  # calls to libots crash without this
4149         fi
4150         ;;
4151 esac
4152
4153 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4154     add_cppflags '-I\$(SRC_PATH)/compat/float'
4155
4156 esc(){
4157     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4158 }
4159
4160 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
4161
4162 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4163
4164 set_default $PATHS_LIST
4165 set_default nm
4166
4167 # we need to build at least one lib type
4168 if ! enabled_any static shared; then
4169     cat <<EOF
4170 At least one library type must be built.
4171 Specify --enable-static to build the static libraries or --enable-shared to
4172 build the shared libraries as well. To only build the shared libraries specify
4173 --disable-static in addition to --enable-shared.
4174 EOF
4175     exit 1
4176 fi
4177
4178 disabled optimizations || check_cflags -fomit-frame-pointer
4179
4180 enable_weak_pic() {
4181     disabled pic && return
4182     enable pic
4183     add_cppflags -DPIC
4184     case "$target_os" in
4185     mingw*|cygwin*)
4186         ;;
4187     *)
4188         add_cflags -fPIC
4189         ;;
4190     esac
4191     add_asflags  -fPIC
4192 }
4193
4194 enabled pic && enable_weak_pic
4195
4196 check_cc <<EOF || die "Symbol mangling check failed."
4197 int ff_extern;
4198 EOF
4199 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4200 extern_prefix=${sym%%ff_extern*}
4201
4202 check_inline_asm inline_asm '"" ::'
4203
4204 _restrict=
4205 for restrict_keyword in restrict __restrict__ __restrict; do
4206     check_cc <<EOF && _restrict=$restrict_keyword && break
4207 void foo(char * $restrict_keyword p);
4208 EOF
4209 done
4210
4211 check_cc <<EOF && enable pragma_deprecated
4212 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4213 EOF
4214
4215 check_cc <<EOF && enable attribute_packed
4216 struct { int x; } __attribute__((packed)) x;
4217 EOF
4218
4219 check_cc <<EOF && enable attribute_may_alias
4220 union { int x; } __attribute__((may_alias)) x;
4221 EOF
4222
4223 check_cc <<EOF || die "endian test failed"
4224 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4225 EOF
4226 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4227
4228 check_gas() {
4229     log "check_gas using '$as' as AS"
4230     # :vararg is used on aarch64, arm and ppc altivec
4231     check_as <<EOF || return 1
4232 .macro m n, y:vararg=0
4233 \n: .int \y
4234 .endm
4235 m x
4236 EOF
4237     # .altmacro is only used in arm asm
4238     ! enabled arm || check_as <<EOF || return 1
4239 .altmacro
4240 EOF
4241     enable gnu_as
4242     return 0
4243 }
4244
4245 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4246     nogas=:
4247     enabled_any arm aarch64 && nogas=die
4248     enabled_all ppc altivec && nogas=warn
4249     as_noop=-v
4250
4251     case $as_type in
4252         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4253         gcc)  gaspp_as_type=gas ;;
4254         *)    gaspp_as_type=$as_type ;;
4255     esac
4256
4257     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4258
4259     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4260         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4261
4262     if ! check_gas ; then
4263         as=${gas:=$as}
4264         check_gas || \
4265             $nogas "GNU assembler not found, install/update gas-preprocessor"
4266     fi
4267
4268     check_as <<EOF && enable as_func
4269 .func test
4270 .endfunc
4271 EOF
4272 fi
4273
4274 check_inline_asm inline_asm_labels '"1:\n"'
4275
4276 if enabled aarch64; then
4277     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4278     # internal assembler in clang 3.3 does not support this instruction
4279     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4280     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4281
4282     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4283
4284 elif enabled alpha; then
4285
4286     check_cflags -mieee
4287
4288 elif enabled arm; then
4289
4290     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4291     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4292     enabled thumb && check_cflags -mthumb || check_cflags -marm
4293
4294     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4295         enable vfp_args
4296     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4297         enable vfp_args
4298     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4299         case "${cross_prefix:-$cc}" in
4300             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4301             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4302 __asm__ (".eabi_attribute 28, 1");
4303 int main(void) { return 0; }
4304 EOF
4305         esac
4306         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4307     fi
4308
4309     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4310     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4311     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4312     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4313     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4314     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4315
4316     [ $target_os = linux ] || [ $target_os = android ] ||
4317         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4318             $ARCH_EXT_LIST_ARM
4319
4320     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4321
4322     check_as <<EOF && enable as_dn_directive
4323 ra .dn d0.i16
4324 .unreq ra
4325 EOF
4326     check_as <<EOF && enable as_fpu_directive
4327 .fpu neon
4328 EOF
4329
4330     # llvm's integrated assembler supports .object_arch from llvm 3.5
4331     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4332 .object_arch armv4
4333 EOF
4334
4335     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4336
4337 elif enabled mips; then
4338
4339     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4340
4341     # make sure that only an instruction set is enabled
4342     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4343
4344     if enabled mips64; then
4345         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4346             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4347                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4348     else
4349         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4350             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4351                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4352     fi
4353
4354 elif enabled parisc; then
4355
4356     if enabled gcc; then
4357         case $($cc -dumpversion) in
4358             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4359         esac
4360     fi
4361
4362 elif enabled ppc; then
4363
4364     enable local_aligned_8 local_aligned_16 local_aligned_32
4365
4366     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4367     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4368     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4369     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4370
4371     # AltiVec flags: The FSF version of GCC differs from the Apple version
4372     if enabled altivec; then
4373         check_cflags -maltivec -mabi=altivec &&
4374         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4375         check_cflags -faltivec
4376
4377         # check if our compiler supports Motorola AltiVec C API
4378         check_cc <<EOF || disable altivec
4379 $inc_altivec_h
4380 int main(void) {
4381     vector signed int v1 = (vector signed int) { 0 };
4382     vector signed int v2 = (vector signed int) { 1 };
4383     v1 = vec_add(v1, v2);
4384     return 0;
4385 }
4386 EOF
4387
4388         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4389     fi
4390
4391     if enabled vsx; then
4392         check_cflags -mvsx &&
4393         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4394     fi
4395
4396     if enabled power8; then
4397         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4398     fi
4399
4400 elif enabled x86; then
4401
4402     check_builtin rdtsc    intrin.h   "__rdtsc()"
4403     check_builtin mm_empty mmintrin.h "_mm_empty()"
4404
4405     enable local_aligned_8 local_aligned_16 local_aligned_32
4406
4407     # check whether EBP is available on x86
4408     # As 'i' is stored on the stack, this program will crash
4409     # if the base pointer is used to access it because the
4410     # base pointer is cleared in the inline assembly code.
4411     check_exec_crash <<EOF && enable ebp_available
4412 volatile int i=0;
4413 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4414 return i;
4415 EOF
4416
4417     # check whether EBX is available on x86
4418     check_inline_asm ebx_available '""::"b"(0)' &&
4419         check_inline_asm ebx_available '"":::"%ebx"'
4420
4421     # check whether xmm clobbers are supported
4422     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4423
4424     # check whether binutils is new enough to compile SSSE3/MMXEXT
4425     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4426     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4427
4428     if ! disabled_any asm mmx yasm; then
4429         if check_cmd $yasmexe --version; then
4430             enabled x86_64 && yasm_extra="-m amd64"
4431             yasm_debug="-g dwarf2"
4432         elif check_cmd nasm -v; then
4433             yasmexe=nasm
4434             yasm_debug="-g -F dwarf"
4435             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4436         fi
4437
4438         YASMFLAGS="-f $objformat $yasm_extra"
4439         enabled pic               && append YASMFLAGS "-DPIC"
4440         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4441         case "$objformat" in
4442             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4443         esac
4444
4445         check_yasm "movbe ecx, [5]" && enable yasm ||
4446             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4447         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4448         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4449         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4450         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4451         check_yasm "CPU amdnop" || disable cpunop
4452     fi
4453
4454     case "$cpu" in
4455         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4456             disable fast_clz
4457         ;;
4458     esac
4459
4460 fi
4461
4462 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4463
4464 check_ldflags -Wl,--as-needed
4465
4466 if check_func dlopen; then
4467     ldl=
4468 elif check_func dlopen -ldl; then
4469     ldl=-ldl
4470 fi
4471
4472 if ! disabled network; then
4473     check_func getaddrinfo $network_extralibs
4474     check_func inet_aton $network_extralibs
4475
4476     check_type netdb.h "struct addrinfo"
4477     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4478     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4479     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4480     check_type poll.h "struct pollfd"
4481     check_type netinet/sctp.h "struct sctp_event_subscribe"
4482     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4483     check_type netinet/in.h "struct sockaddr_in6"
4484     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4485     check_type "sys/types.h sys/socket.h" socklen_t
4486
4487     # Prefer arpa/inet.h over winsock2
4488     if check_header arpa/inet.h ; then
4489         check_func closesocket
4490     elif check_header winsock2.h ; then
4491         check_func_headers winsock2.h closesocket -lws2 &&
4492             network_extralibs="-lws2" ||
4493         { check_func_headers winsock2.h closesocket -lws2_32 &&
4494             network_extralibs="-lws2_32"; } || disable winsock2_h network
4495         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4496
4497         check_type ws2tcpip.h socklen_t
4498         check_type ws2tcpip.h "struct addrinfo"
4499         check_type ws2tcpip.h "struct group_source_req"
4500         check_type ws2tcpip.h "struct ip_mreq_source"
4501         check_type ws2tcpip.h "struct ipv6_mreq"
4502         check_type winsock2.h "struct pollfd"
4503         check_struct winsock2.h "struct sockaddr" sa_len
4504         check_type ws2tcpip.h "struct sockaddr_in6"
4505         check_type ws2tcpip.h "struct sockaddr_storage"
4506     else
4507         disable network
4508     fi
4509 fi
4510
4511 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4512 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4513 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4514 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4515
4516 case "$custom_allocator" in
4517     jemalloc)
4518         # jemalloc by default does not use a prefix
4519         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4520     ;;
4521     tcmalloc)
4522         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4523         malloc_prefix=tc_
4524     ;;
4525 esac
4526
4527 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4528 check_func  ${malloc_prefix}memalign            && enable memalign
4529 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4530
4531 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4532     check_func_headers time.h clock_gettime ||
4533         { check_lib clock_gettime time.h clock_gettime -lrt && LIBRT="-lrt"; }
4534
4535 check_func  fcntl
4536 check_func  fork
4537 check_func  gethrtime
4538 check_func  getopt
4539 check_func  getrusage
4540 check_func  gettimeofday
4541 check_func  gmtime_r
4542 check_func  isatty
4543 check_func  localtime_r
4544 check_func  mach_absolute_time
4545 check_func  mkstemp
4546 check_func  mmap
4547 check_func  mprotect
4548 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4549 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4550 check_func  sched_getaffinity
4551 check_func  setrlimit
4552 check_func  strerror_r
4553 check_func  sysconf
4554 check_func  sysctl
4555 check_func  usleep
4556
4557 check_func_headers io.h setmode
4558 check_func_headers stdlib.h getenv
4559
4560 check_func_headers windows.h GetProcessAffinityMask
4561 check_func_headers windows.h GetProcessTimes
4562 check_func_headers windows.h GetSystemTimeAsFileTime
4563 check_func_headers windows.h LoadLibrary
4564 check_func_headers windows.h MapViewOfFile
4565 check_func_headers windows.h SetConsoleTextAttribute
4566 check_func_headers windows.h Sleep
4567 check_func_headers windows.h VirtualAlloc
4568 check_struct windows.h "CONDITION_VARIABLE" Ptr
4569
4570 check_header d3d11.h
4571 check_header direct.h
4572 check_header dlfcn.h
4573 check_header dxva.h
4574 check_header dxva2api.h
4575 check_header io.h
4576 check_header mach/mach_time.h
4577 check_header malloc.h
4578 check_header poll.h
4579 check_header sys/mman.h
4580 check_header sys/param.h
4581 check_header sys/resource.h
4582 check_header sys/select.h
4583 check_header sys/time.h
4584 check_header sys/un.h
4585 check_header unistd.h
4586 check_header valgrind/valgrind.h
4587 check_header VideoDecodeAcceleration/VDADecoder.h
4588 check_header windows.h
4589 check_header X11/extensions/XvMClib.h
4590
4591 # it seems there are versions of clang in some distros that try to use the
4592 # gcc headers, which explodes for stdatomic
4593 # so we also check that atomics actually work here
4594 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4595
4596 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4597 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4598 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4599
4600 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4601
4602 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4603 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4604 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4605
4606 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4607 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4608 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4609 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4610 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4611 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4612 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4613 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4614
4615 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4616
4617 if ! disabled w32threads && ! enabled pthreads; then
4618     check_lib w32threads "windows.h process.h" _beginthreadex
4619 fi
4620
4621 # check for some common methods of building with pthread support
4622 # do this before the optional library checks as some of them require pthreads
4623 if ! disabled pthreads && ! enabled w32threads; then
4624     if check_lib pthreads pthread.h pthread_join -pthread; then
4625         add_cflags -pthread
4626     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4627         add_cflags -pthreads
4628     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4629         :
4630     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4631         :
4632     elif check_func pthread_join; then
4633         enable pthreads
4634     fi
4635 fi
4636
4637 enabled pthreads &&
4638     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4639
4640 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4641 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4642
4643 check_lib libm math.h sin -lm && LIBM="-lm"
4644
4645 atan2f_args=2
4646 ldexpf_args=2
4647 powf_args=2
4648
4649 for func in $MATH_FUNCS; do
4650     eval check_mathfunc $func \${${func}_args:-1} $LIBM
4651 done
4652
4653 # these are off by default, so fail if requested and not available
4654 enabled avisynth          && require_header avisynth/avisynth_c.h
4655 enabled avxsynth          && require avxsynth "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl
4656 enabled cuda              && require cuda cuda.h cuInit -lcuda
4657 enabled frei0r            && require_header frei0r.h
4658 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4659 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4660 enabled libdc1394         && require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new
4661 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4662 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4663 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4664 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4665 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4666 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4667                                    check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
4668                                done || die "ERROR: libgsm not found"; }
4669 enabled libhdcd           && require_pkg_config libhdcd "hdcd/hdcd_simple.h" hdcd_new
4670 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4671 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4672 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4673 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4674 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4675 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4676 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4677 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4678 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4679 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4680                                require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4681 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4682 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4683 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4684 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4685 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4686 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4687 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4688 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4689 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4690 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4691 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4692 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4693     enabled libvpx_vp8_decoder && {
4694         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4695             disable libvpx_vp8_decoder;
4696     }
4697     enabled libvpx_vp8_encoder && {
4698         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4699             disable libvpx_vp8_encoder;
4700     }
4701     enabled libvpx_vp9_decoder && {
4702         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4703             disable libvpx_vp9_decoder;
4704     }
4705     enabled libvpx_vp9_encoder && {
4706         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4707             disable libvpx_vp9_encoder;
4708     }
4709     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4710         die "libvpx enabled but no supported decoders found"
4711     fi
4712 }
4713 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4714 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4715 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4716                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4717                              { check_cpp_condition x264.h "X264_MPEG2" &&
4718                                enable libx262; }
4719 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4720                              require_cpp_condition x265.h "X265_BUILD >= 57"
4721 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4722 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4723 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4724                                { ! enabled cross_compile &&
4725                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4726                                  add_ldflags -L/opt/vc/lib/ &&
4727                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4728                                die "ERROR: mmal not found" &&
4729                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4730 enabled omx_rpi           && { check_header OMX_Core.h ||
4731                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4732                                die "ERROR: OpenMAX IL headers not found"; }
4733 enabled omx               && require_header OMX_Core.h
4734 enabled openssl           && { { check_pkg_config openssl openssl/ssl.h OPENSSL_init_ssl ||
4735                                  check_pkg_config openssl openssl/ssl.h SSL_library_init; } && {
4736                                add_cflags $openssl_cflags && add_extralibs $openssl_extralibs; } ||
4737                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4738                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4739                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4740                                die "ERROR: openssl not found"; }
4741
4742 enabled gnutls            && check_lib gmp gmp.h mpz_export -lgmp
4743
4744 if enabled nvenc; then
4745     require_header nvEncodeAPI.h
4746     require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4747 fi
4748
4749 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4750     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4751     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4752     enable sdl
4753 fi
4754
4755 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4756 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4757
4758 check_header linux/fb.h
4759 check_header linux/videodev2.h
4760 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4761
4762 check_header AVFoundation/AVFoundation.h
4763
4764 check_header sys/videoio.h
4765
4766 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4767 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4768 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4769 # w32api 3.12 had it defined wrong
4770 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4771
4772 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4773 { check_header dev/bktr/ioctl_meteor.h &&
4774   check_header dev/bktr/ioctl_bt848.h; } ||
4775 { check_header machine/ioctl_meteor.h &&
4776   check_header machine/ioctl_bt848.h; } ||
4777 { check_header dev/video/meteor/ioctl_meteor.h &&
4778   check_header dev/video/bktr/ioctl_bt848.h; } ||
4779 check_header dev/ic/bt8xx.h
4780
4781 check_header sys/soundcard.h
4782 check_header soundcard.h
4783
4784 enabled_any alsa_indev alsa_outdev &&
4785     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4786
4787 enabled jack_indev && check_lib jack jack/jack.h jack_client_open -ljack &&
4788     check_func jack_port_get_latency_range -ljack
4789
4790 enabled_any sndio_indev sndio_outdev && check_lib sndio sndio.h sio_open -lsndio
4791
4792 if enabled libcdio; then
4793     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4794     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4795     die "ERROR: No usable libcdio/cdparanoia found"
4796 fi
4797
4798 if enabled libxcb; then
4799     require_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles
4800     disabled libxcb_shm ||
4801         require_pkg_config xcb-shm xcb/shm.h xcb_shm_attach
4802     disabled libxcb_xfixes ||
4803         require_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image
4804 fi
4805
4806 enabled dxva2 &&
4807     check_lib dxva2_lib windows.h CoTaskMemFree -lole32
4808
4809 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4810
4811 enabled vaapi &&
4812     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4813     disable vaapi
4814
4815 enabled vaapi &&
4816     check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
4817
4818 enabled vaapi &&
4819     check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
4820
4821 enabled vdpau &&
4822     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4823     disable vdpau
4824
4825 enabled vdpau &&
4826     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
4827
4828 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4829
4830 # add some useful compiler flags if supported
4831 check_cflags -Wdeclaration-after-statement
4832 check_cflags -Wall
4833 check_cflags -Wdisabled-optimization
4834 check_cflags -Wpointer-arith
4835 check_cflags -Wredundant-decls
4836 check_cflags -Wwrite-strings
4837 check_cflags -Wtype-limits
4838 check_cflags -Wundef
4839 check_cflags -Wmissing-prototypes
4840 check_cflags -Wstrict-prototypes
4841
4842 if enabled extra_warnings; then
4843     check_cflags -Wcast-qual
4844     check_cflags -Wextra
4845     check_cflags -Wpedantic
4846 fi
4847