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