69f586358264616378f47ad99c613b3a259b55f3
[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         enabled ${cfg}_checking && die "Circular dependency for $cfg."
616         disabled ${cfg}_checking && continue
617         enable ${cfg}_checking
618         append allopts $cfg
619
620         eval dep_all="\$${cfg}_deps"
621         eval dep_any="\$${cfg}_deps_any"
622         eval dep_con="\$${cfg}_conflict"
623         eval dep_sel="\$${cfg}_select"
624         eval dep_sgs="\$${cfg}_suggest"
625         eval dep_ifa="\$${cfg}_if"
626         eval dep_ifn="\$${cfg}_if_any"
627
628         pushvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
629         do_check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
630         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
631
632         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
633         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
634         enabled_all  $dep_all || disable $cfg
635         enabled_any  $dep_any || disable $cfg
636         disabled_all $dep_con || disable $cfg
637         disabled_any $dep_sel && disable $cfg
638
639         if enabled $cfg; then
640             enable_deep $dep_sel
641             enable_deep_weak $dep_sgs
642         fi
643
644         disable ${cfg}_checking
645     done
646 }
647
648 check_deps(){
649     unset allopts
650
651     do_check_deps "$@"
652
653     for cfg in $allopts; do
654         enabled $cfg || continue
655         eval dep_extralibs="\$${cfg}_extralibs"
656         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
657     done
658 }
659
660 print_config(){
661     pfx=$1
662     files=$2
663     shift 2
664     map 'eval echo "$v \${$v:-no}"' "$@" |
665     awk "BEGIN { split(\"$files\", files) }
666         {
667             c = \"$pfx\" toupper(\$1);
668             v = \$2;
669             sub(/yes/, 1, v);
670             sub(/no/,  0, v);
671             for (f in files) {
672                 file = files[f];
673                 if (file ~ /\\.h\$/) {
674                     printf(\"#define %s %d\\n\", c, v) >>file;
675                 } else if (file ~ /\\.asm\$/) {
676                     printf(\"%%define %s %d\\n\", c, v) >>file;
677                 } else if (file ~ /\\.mak\$/) {
678                     n = -v ? \"\" : \"!\";
679                     printf(\"%s%s=yes\\n\", n, c) >>file;
680                 }
681             }
682         }"
683 }
684
685 print_enabled(){
686     suf=$1
687     shift
688     for v; do
689         enabled $v && printf "%s\n" ${v%$suf}
690     done
691 }
692
693 append(){
694     var=$1
695     shift
696     eval "$var=\"\$$var $*\""
697 }
698
699 prepend(){
700     var=$1
701     shift
702     eval "$var=\"$* \$$var\""
703 }
704
705 unique(){
706     var=$1
707     uniq_list=""
708     for tok in $(eval echo \$$var); do
709         uniq_list="$(filter_out $tok $uniq_list) $tok"
710     done
711     eval "$var=\"${uniq_list}\""
712 }
713
714 add_cppflags(){
715     append CPPFLAGS "$@"
716 }
717
718 add_cflags(){
719     append CFLAGS $($cflags_filter "$@")
720 }
721
722 add_cflags_headers(){
723     append CFLAGS_HEADERS $($cflags_filter "$@")
724 }
725
726 add_asflags(){
727     append ASFLAGS $($asflags_filter "$@")
728 }
729
730 add_objcflags(){
731     append OBJCFLAGS $($objcflags_filter "$@")
732 }
733
734 add_ldflags(){
735     append LDFLAGS $($ldflags_filter "$@")
736 }
737
738 add_ldexeflags(){
739     append LDEXEFLAGS $($ldflags_filter "$@")
740 }
741
742 add_stripflags(){
743     append STRIPFLAGS "$@"
744 }
745
746 add_extralibs(){
747     prepend extralibs $($ldflags_filter "$@")
748 }
749
750 add_host_cppflags(){
751     append host_cppflags "$@"
752 }
753
754 add_host_cflags(){
755     append host_cflags $($host_cflags_filter "$@")
756 }
757
758 add_host_ldflags(){
759     append host_ldflags $($host_ldflags_filter "$@")
760 }
761
762 add_compat(){
763     append compat_objs $1
764     shift
765     map 'add_cppflags -D$v' "$@"
766 }
767
768 check_cmd(){
769     log "$@"
770     "$@" >> $logfile 2>&1
771 }
772
773 cc_o(){
774     eval printf '%s\\n' $CC_O
775 }
776
777 cc_e(){
778     eval printf '%s\\n' $CC_E
779 }
780
781 check_cc(){
782     log check_cc "$@"
783     cat > $TMPC
784     log_file $TMPC
785     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
786 }
787
788 check_objcc(){
789     log check_objcc "$@"
790     cat > $TMPC
791     log_file $TMPC
792     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
793 }
794
795 check_cpp(){
796     log check_cpp "$@"
797     cat > $TMPC
798     log_file $TMPC
799     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
800 }
801
802 as_o(){
803     eval printf '%s\\n' $AS_O
804 }
805
806 check_as(){
807     log check_as "$@"
808     cat > $TMPS
809     log_file $TMPS
810     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
811 }
812
813 check_inline_asm(){
814     log check_inline_asm "$@"
815     name="$1"
816     code="$2"
817     shift 2
818     disable $name
819     check_cc "$@" <<EOF && enable $name
820 void foo(void){ __asm__ volatile($code); }
821 EOF
822 }
823
824 check_insn(){
825     log check_insn "$@"
826     check_inline_asm ${1}_inline "\"$2\""
827     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
828 }
829
830 check_yasm(){
831     log check_yasm "$@"
832     echo "$1" > $TMPS
833     log_file $TMPS
834     shift 1
835     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
836 }
837
838 ld_o(){
839     eval printf '%s\\n' $LD_O
840 }
841
842 check_ld(){
843     log check_ld "$@"
844     flags=$(filter_out '-l*' "$@")
845     libs=$(filter '-l*' "$@")
846     check_cc $($cflags_filter $flags) || return
847     flags=$($ldflags_filter $flags)
848     libs=$($ldflags_filter $libs)
849     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
850 }
851
852 print_include(){
853     hdr=$1
854     test "${hdr%.h}" = "${hdr}" &&
855         echo "#include $hdr"    ||
856         echo "#include <$hdr>"
857 }
858
859 check_code(){
860     log check_code "$@"
861     check=$1
862     headers=$2
863     code=$3
864     shift 3
865     {
866         for hdr in $headers; do
867             print_include $hdr
868         done
869         echo "int main(void) { $code; return 0; }"
870     } | check_$check "$@"
871 }
872
873 check_cppflags(){
874     log check_cppflags "$@"
875     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
876 #include <stdlib.h>;
877 EOF
878 }
879
880 test_cflags(){
881     log test_cflags "$@"
882     set -- $($cflags_filter "$@")
883     check_cc "$@" <<EOF
884 int x;
885 EOF
886 }
887
888 check_cflags(){
889     log check_cflags "$@"
890     test_cflags "$@" && add_cflags "$@"
891 }
892
893 test_objcflags(){
894     log test_objcflags "$@"
895     set -- $($objcflags_filter "$@")
896     check_objcc "$@" <<EOF
897 int x;
898 EOF
899 }
900
901 check_objcflags(){
902     log check_objcflags "$@"
903     test_objcflags "$@" && add_objcflags "$@"
904 }
905
906 test_ldflags(){
907     log test_ldflags "$@"
908     check_ld "$@" <<EOF
909 int main(void){ return 0; }
910 EOF
911 }
912
913 check_ldflags(){
914     log check_ldflags "$@"
915     test_ldflags "$@" && add_ldflags "$@"
916 }
917
918 test_stripflags(){
919     log test_stripflags "$@"
920     # call check_cc to get a fresh TMPO
921     check_cc <<EOF
922 int main(void) { return 0; }
923 EOF
924     check_cmd $strip $STRIPFLAGS "$@" $TMPO
925 }
926
927 check_stripflags(){
928     log check_stripflags "$@"
929     test_stripflags "$@" && add_stripflags "$@"
930 }
931
932 check_header(){
933     log check_header "$@"
934     header=$1
935     shift
936     disable_safe $header
937     check_cpp "$@" <<EOF && enable_safe $header
938 #include <$header>
939 int x;
940 EOF
941 }
942
943 check_func(){
944     log check_func "$@"
945     func=$1
946     shift
947     disable $func
948     check_ld "$@" <<EOF && enable $func
949 extern int $func();
950 int main(void){ $func(); }
951 EOF
952 }
953
954 check_mathfunc(){
955     log check_mathfunc "$@"
956     func=$1
957     narg=$2
958     shift 2
959     test $narg = 2 && args="f, g" || args="f"
960     disable $func
961     check_ld "$@" <<EOF && enable $func
962 #include <math.h>
963 float foo(float f, float g) { return $func($args); }
964 int main(void){ return 0; }
965 EOF
966 }
967
968 check_func_headers(){
969     log check_func_headers "$@"
970     headers=$1
971     funcs=$2
972     shift 2
973     {
974         for hdr in $headers; do
975             print_include $hdr
976         done
977         for func in $funcs; do
978             echo "long check_$func(void) { return (long) $func; }"
979         done
980         echo "int main(void) { return 0; }"
981     } | check_ld "$@" && enable $funcs && enable_safe $headers
982 }
983
984 check_cpp_condition(){
985     log check_cpp_condition "$@"
986     header=$1
987     condition=$2
988     shift 2
989     check_cpp "$@" <<EOF
990 #include <$header>
991 #if !($condition)
992 #error "unsatisfied condition: $condition"
993 #endif
994 EOF
995 }
996
997 test_cflags_cpp(){
998     log test_cflags_cpp "$@"
999     flags=$1
1000     condition=$2
1001     shift 2
1002     set -- $($cflags_filter "$flags")
1003     check_cpp "$@" <<EOF
1004 #if !($condition)
1005 #error "unsatisfied condition: $condition"
1006 #endif
1007 EOF
1008 }
1009
1010 check_lib(){
1011     log check_lib "$@"
1012     name="$1"
1013     headers="$2"
1014     funcs="$3"
1015     shift 3
1016     disable $name
1017     check_func_headers "$headers" "$funcs" "$@" &&
1018         enable $name && add_extralibs "$@"
1019 }
1020
1021 check_pkg_config(){
1022     log check_pkg_config "$@"
1023     pkg_version="$1"
1024     pkg="${1%% *}"
1025     headers="$2"
1026     funcs="$3"
1027     shift 3
1028     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1029     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1030     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1031     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1032         set_safe "${pkg}_cflags"    $pkg_cflags &&
1033         set_safe "${pkg}_extralibs" $pkg_libs
1034 }
1035
1036 check_exec(){
1037     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1038 }
1039
1040 check_exec_crash(){
1041     log check_exec_crash "$@"
1042     code=$(cat)
1043
1044     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1045     # are safe but may not be available everywhere.  Thus we use
1046     # raise(SIGTERM) instead.  The check is run in a subshell so we
1047     # can redirect the "Terminated" message from the shell.  SIGBUS
1048     # is not defined by standard C so it is used conditionally.
1049
1050     (check_exec "$@") >> $logfile 2>&1 <<EOF
1051 #include <signal.h>
1052 static void sighandler(int sig){
1053     raise(SIGTERM);
1054 }
1055 int foo(void){
1056     $code
1057 }
1058 int (*func_ptr)(void) = foo;
1059 int main(void){
1060     signal(SIGILL, sighandler);
1061     signal(SIGFPE, sighandler);
1062     signal(SIGSEGV, sighandler);
1063 #ifdef SIGBUS
1064     signal(SIGBUS, sighandler);
1065 #endif
1066     return func_ptr();
1067 }
1068 EOF
1069 }
1070
1071 check_type(){
1072     log check_type "$@"
1073     headers=$1
1074     type=$2
1075     shift 2
1076     disable_safe "$type"
1077     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1078 }
1079
1080 check_struct(){
1081     log check_struct "$@"
1082     headers=$1
1083     struct=$2
1084     member=$3
1085     shift 3
1086     disable_safe "${struct}_${member}"
1087     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1088         enable_safe "${struct}_${member}"
1089 }
1090
1091 check_builtin(){
1092     log check_builtin "$@"
1093     name=$1
1094     headers=$2
1095     builtin=$3
1096     shift 3
1097     disable "$name"
1098     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1099 }
1100
1101 check_compile_assert(){
1102     log check_compile_assert "$@"
1103     name=$1
1104     headers=$2
1105     condition=$3
1106     shift 3
1107     disable "$name"
1108     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1109 }
1110
1111 require(){
1112     log require "$@"
1113     name_version="$1"
1114     name="${1%% *}"
1115     headers="$2"
1116     func="$3"
1117     shift 3
1118     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1119 }
1120
1121 require_header(){
1122     log require "$@"
1123     header="$1"
1124     shift
1125     check_header "$header" "$@" || die "ERROR: $header not found"
1126 }
1127
1128 require_cpp_condition(){
1129     log require "$@"
1130     header="$1"
1131     condition="$2"
1132     shift 2
1133     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1134 }
1135
1136 require_pkg_config(){
1137     log require_pkg_config "$@"
1138     name="$1"
1139     shift
1140     pkg_version="$1"
1141     pkg="${1%% *}"
1142     test "$name" = "" && name=$pkg
1143     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1144     add_cflags    $(get_safe "${pkg}_cflags")
1145     add_extralibs $(get_safe "${pkg}_extralibs")
1146 }
1147
1148 hostcc_e(){
1149     eval printf '%s\\n' $HOSTCC_E
1150 }
1151
1152 hostcc_o(){
1153     eval printf '%s\\n' $HOSTCC_O
1154 }
1155
1156 check_host_cc(){
1157     log check_host_cc "$@"
1158     cat > $TMPC
1159     log_file $TMPC
1160     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1161 }
1162
1163 check_host_cpp(){
1164     log check_host_cpp "$@"
1165     cat > $TMPC
1166     log_file $TMPC
1167     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1168 }
1169
1170 check_host_cppflags(){
1171     log check_host_cppflags "$@"
1172     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1173 #include <stdlib.h>;
1174 EOF
1175 }
1176
1177 check_host_cflags(){
1178     log check_host_cflags "$@"
1179     set -- $($host_cflags_filter "$@")
1180     check_host_cc "$@" <<EOF && append host_cflags "$@"
1181 int x;
1182 EOF
1183 }
1184
1185 check_host_cpp_condition(){
1186     log check_host_cpp_condition "$@"
1187     header=$1
1188     condition=$2
1189     shift 2
1190     check_host_cpp "$@" <<EOF
1191 #include <$header>
1192 #if !($condition)
1193 #error "unsatisfied condition: $condition"
1194 #endif
1195 EOF
1196 }
1197
1198 apply(){
1199     file=$1
1200     shift
1201     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1202 }
1203
1204 cp_if_changed(){
1205     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1206     mkdir -p "$(dirname $2)"
1207     cp -f "$1" "$2"
1208 }
1209
1210 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1211 # system-dependent things.
1212
1213 AVCODEC_COMPONENTS="
1214     bsfs
1215     decoders
1216     encoders
1217     hwaccels
1218     parsers
1219 "
1220
1221 AVDEVICE_COMPONENTS="
1222     indevs
1223     outdevs
1224 "
1225 AVFILTER_COMPONENTS="
1226     filters
1227 "
1228 AVFORMAT_COMPONENTS="
1229     demuxers
1230     muxers
1231     protocols
1232 "
1233
1234 AVRESAMPLE_COMPONENTS=""
1235 AVUTIL_COMPONENTS=""
1236
1237 COMPONENT_LIST="
1238     $AVCODEC_COMPONENTS
1239     $AVDEVICE_COMPONENTS
1240     $AVFILTER_COMPONENTS
1241     $AVFORMAT_COMPONENTS
1242     $AVRESAMPLE_COMPONENTS
1243     $AVUTIL_COMPONENTS
1244 "
1245
1246 EXAMPLE_LIST="
1247     decode_audio_example
1248     decode_video_example
1249     encode_audio_example
1250     encode_video_example
1251     filter_audio_example
1252     metadata_example
1253     output_example
1254     qsvdec_example
1255     transcode_aac_example
1256 "
1257
1258 HWACCEL_LIBRARY_NONFREE_LIST="
1259     cuda
1260     libnpp
1261 "
1262 HWACCEL_LIBRARY_LIST="
1263     $HWACCEL_LIBRARY_NONFREE_LIST
1264     d3d11va
1265     dxva2
1266     libmfx
1267     mmal
1268     nvenc
1269     omx
1270     vaapi
1271     vda
1272     vdpau
1273 "
1274
1275 EXTERNAL_LIBRARY_GPL_LIST="
1276     libcdio
1277     libx264
1278     libx265
1279     libxavs
1280     libxvid
1281 "
1282
1283 EXTERNAL_LIBRARY_NONFREE_LIST="
1284     libfaac
1285     libfdk_aac
1286     openssl
1287 "
1288
1289 EXTERNAL_LIBRARY_VERSION3_LIST="
1290     libopencore_amrnb
1291     libopencore_amrwb
1292     libvo_aacenc
1293     libvo_amrwbenc
1294 "
1295
1296 EXTERNAL_LIBRARY_LIST="
1297     $EXTERNAL_LIBRARY_GPL_LIST
1298     $EXTERNAL_LIBRARY_NONFREE_LIST
1299     $EXTERNAL_LIBRARY_VERSION3_LIST
1300     avisynth
1301     avxsynth
1302     bzlib
1303     frei0r
1304     gnutls
1305     libbs2b
1306     libdc1394
1307     libdcadec
1308     libfontconfig
1309     libfreetype
1310     libgsm
1311     libhdcd
1312     libilbc
1313     libkvazaar
1314     libmp3lame
1315     libopencv
1316     libopenh264
1317     libopenjpeg
1318     libopus
1319     libpulse
1320     librtmp
1321     libschroedinger
1322     libsnappy
1323     libspeex
1324     libtheora
1325     libtwolame
1326     libvorbis
1327     libvpx
1328     libwavpack
1329     libwebp
1330     libxcb
1331     libxcb_shm
1332     libxcb_xfixes
1333     zlib
1334 "
1335
1336 FEATURE_LIST="
1337     gray
1338     hardcoded_tables
1339     omx_rpi
1340     runtime_cpudetect
1341     safe_bitstream_reader
1342     shared
1343     small
1344     sram
1345     static
1346     swscale_alpha
1347 "
1348
1349 LIBRARY_LIST="
1350     avcodec
1351     avdevice
1352     avfilter
1353     avformat
1354     avresample
1355     avutil
1356     swscale
1357 "
1358
1359 LICENSE_LIST="
1360     gpl
1361     nonfree
1362     version3
1363 "
1364
1365 PROGRAM_LIST="
1366     avconv
1367     avplay
1368     avprobe
1369 "
1370
1371 SUBSYSTEM_LIST="
1372     dct
1373     doc
1374     error_resilience
1375     faan
1376     fft
1377     lsp
1378     lzo
1379     mdct
1380     network
1381     rdft
1382 "
1383
1384 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1385 CONFIG_LIST="
1386     $EXAMPLE_LIST
1387     $EXTERNAL_LIBRARY_LIST
1388     $HWACCEL_LIBRARY_LIST
1389     $FEATURE_LIST
1390     $LICENSE_LIST
1391     $LIBRARY_LIST
1392     $PROGRAM_LIST
1393     $SUBSYSTEM_LIST
1394     neon_clobber_test
1395     pic
1396     pod2man
1397     texi2html
1398     thumb
1399     valgrind_backtrace
1400     xmm_clobber_test
1401     $COMPONENT_LIST
1402 "
1403
1404 THREADS_LIST="
1405     pthreads
1406     w32threads
1407 "
1408
1409 ATOMICS_LIST="
1410     atomics_gcc
1411     atomics_suncc
1412     atomics_win32
1413 "
1414
1415 ARCH_LIST="
1416     aarch64
1417     alpha
1418     arm
1419     avr32
1420     avr32_ap
1421     avr32_uc
1422     bfin
1423     ia64
1424     m68k
1425     mips
1426     mips64
1427     parisc
1428     ppc
1429     ppc64
1430     s390
1431     sh4
1432     sparc
1433     sparc64
1434     tilegx
1435     tilepro
1436     tomi
1437     x86
1438     x86_32
1439     x86_64
1440 "
1441
1442 ARCH_EXT_LIST_ARM="
1443     armv5te
1444     armv6
1445     armv6t2
1446     armv8
1447     neon
1448     vfp
1449     vfpv3
1450 "
1451
1452 ARCH_EXT_LIST_X86_SIMD="
1453     amd3dnow
1454     amd3dnowext
1455     avx
1456     avx2
1457     fma3
1458     fma4
1459     mmx
1460     mmxext
1461     sse
1462     sse2
1463     sse3
1464     sse4
1465     sse42
1466     ssse3
1467     xop
1468 "
1469
1470 ARCH_EXT_LIST_PPC="
1471     altivec
1472     dcbzl
1473     ldbrx
1474     power8
1475     ppc4xx
1476     vsx
1477 "
1478
1479 ARCH_EXT_LIST_X86="
1480     $ARCH_EXT_LIST_X86_SIMD
1481     cpunop
1482     i686
1483 "
1484
1485 ARCH_EXT_LIST_MIPS="
1486     loongson
1487     mips32r1
1488     mips64r1
1489     mips32r2
1490     mips64r2
1491     mips32r6
1492     mips64r6
1493 "
1494
1495 ARCH_EXT_LIST="
1496     $ARCH_EXT_LIST_ARM
1497     $ARCH_EXT_LIST_MIPS
1498     $ARCH_EXT_LIST_PPC
1499     $ARCH_EXT_LIST_X86
1500     vis
1501 "
1502
1503 ARCH_FEATURES="
1504     aligned_stack
1505     fast_64bit
1506     fast_clz
1507     fast_cmov
1508     local_aligned_8
1509     local_aligned_16
1510     local_aligned_32
1511     simd_align_16
1512     simd_align_32
1513 "
1514
1515 BUILTIN_LIST="
1516     atomic_cas_ptr
1517     machine_rw_barrier
1518     MemoryBarrier
1519     mm_empty
1520     rdtsc
1521     sem_timedwait
1522     sync_val_compare_and_swap
1523 "
1524 HAVE_LIST_CMDLINE="
1525     inline_asm
1526     symver
1527     yasm
1528 "
1529
1530 HAVE_LIST_PUB="
1531     bigendian
1532     fast_unaligned
1533 "
1534
1535 HEADERS_LIST="
1536     AVFoundation_AVFoundation_h
1537     alsa_asoundlib_h
1538     altivec_h
1539     arpa_inet_h
1540     cdio_paranoia_h
1541     cdio_paranoia_paranoia_h
1542     d3d11_h
1543     dispatch_dispatch_h
1544     dev_bktr_ioctl_bt848_h
1545     dev_bktr_ioctl_meteor_h
1546     dev_ic_bt8xx_h
1547     dev_video_bktr_ioctl_bt848_h
1548     dev_video_meteor_ioctl_meteor_h
1549     direct_h
1550     dlfcn_h
1551     dxva_h
1552     gsm_h
1553     io_h
1554     mach_mach_time_h
1555     machine_ioctl_bt848_h
1556     machine_ioctl_meteor_h
1557     malloc_h
1558     poll_h
1559     sndio_h
1560     soundcard_h
1561     stdatomic_h
1562     sys_mman_h
1563     sys_param_h
1564     sys_resource_h
1565     sys_select_h
1566     sys_soundcard_h
1567     sys_time_h
1568     sys_un_h
1569     sys_videoio_h
1570     unistd_h
1571     valgrind_valgrind_h
1572     windows_h
1573     winsock2_h
1574 "
1575
1576 INTRINSICS_LIST="
1577     intrinsics_neon
1578 "
1579
1580 MATH_FUNCS="
1581     atanf
1582     atan2f
1583     cbrtf
1584     cosf
1585     exp2
1586     exp2f
1587     expf
1588     isinf
1589     isnan
1590     ldexpf
1591     llrint
1592     llrintf
1593     log2
1594     log2f
1595     log10f
1596     lrint
1597     lrintf
1598     powf
1599     rint
1600     round
1601     roundf
1602     sinf
1603     trunc
1604     truncf
1605 "
1606
1607 SYSTEM_FUNCS="
1608     aligned_malloc
1609     clock_gettime
1610     closesocket
1611     CommandLineToArgvW
1612     CoTaskMemFree
1613     CryptGenRandom
1614     dlopen
1615     fcntl
1616     flt_lim
1617     fork
1618     getaddrinfo
1619     gethrtime
1620     getopt
1621     GetProcessAffinityMask
1622     GetProcessMemoryInfo
1623     GetProcessTimes
1624     getrusage
1625     GetSystemTimeAsFileTime
1626     gettimeofday
1627     gmtime_r
1628     inet_aton
1629     isatty
1630     jack_port_get_latency_range
1631     LoadLibrary
1632     localtime_r
1633     mach_absolute_time
1634     MapViewOfFile
1635     memalign
1636     mkstemp
1637     mmap
1638     mprotect
1639     nanosleep
1640     posix_memalign
1641     sched_getaffinity
1642     SetConsoleTextAttribute
1643     setmode
1644     setrlimit
1645     Sleep
1646     strerror_r
1647     sysconf
1648     sysctl
1649     usleep
1650     VirtualAlloc
1651 "
1652
1653 TOOLCHAIN_FEATURES="
1654     as_dn_directive
1655     as_fpu_directive
1656     as_func
1657     as_object_arch
1658     asm_mod_q
1659     attribute_may_alias
1660     attribute_packed
1661     blocks_extension
1662     ebp_available
1663     ebx_available
1664     gnu_as
1665     ibm_asm
1666     inline_asm_labels
1667     pragma_deprecated
1668     symver_asm_label
1669     symver_gnu_asm
1670     vfp_args
1671     xform_asm
1672     xmm_clobbers
1673 "
1674
1675 TYPES_LIST="
1676     CONDITION_VARIABLE_Ptr
1677     socklen_t
1678     struct_addrinfo
1679     struct_group_source_req
1680     struct_ip_mreq_source
1681     struct_ipv6_mreq
1682     struct_pollfd
1683     struct_rusage_ru_maxrss
1684     struct_sockaddr_in6
1685     struct_sockaddr_sa_len
1686     struct_sockaddr_storage
1687     struct_v4l2_frmivalenum_discrete
1688 "
1689
1690 HAVE_LIST="
1691     $ARCH_EXT_LIST
1692     $(add_suffix _external $ARCH_EXT_LIST)
1693     $(add_suffix _inline   $ARCH_EXT_LIST)
1694     $ARCH_FEATURES
1695     $BUILTIN_LIST
1696     $HAVE_LIST_CMDLINE
1697     $HAVE_LIST_PUB
1698     $HEADERS_LIST
1699     $INTRINSICS_LIST
1700     $MATH_FUNCS
1701     $SYSTEM_FUNCS
1702     $THREADS_LIST
1703     $TOOLCHAIN_FEATURES
1704     $TYPES_LIST
1705     dos_paths
1706     dxva2_lib
1707     libc_msvcrt
1708     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1709     sdl
1710     section_data_rel_ro
1711     threads
1712     vaapi_drm
1713     vaapi_x11
1714     vdpau_x11
1715 "
1716
1717 # options emitted with CONFIG_ prefix but not available on the command line
1718 CONFIG_EXTRA="
1719     aandcttables
1720     ac3dsp
1721     audio_frame_queue
1722     audiodsp
1723     blockdsp
1724     bswapdsp
1725     cabac
1726     dirac_parse
1727     dvprofile
1728     faandct
1729     faanidct
1730     fdctdsp
1731     flacdsp
1732     fmtconvert
1733     g722dsp
1734     gmp
1735     golomb
1736     gplv3
1737     h263dsp
1738     h264chroma
1739     h264dsp
1740     h264parse
1741     h264pred
1742     h264qpel
1743     hevc_ps
1744     hpeldsp
1745     huffman
1746     huffyuvdsp
1747     huffyuvencdsp
1748     idctdsp
1749     iirfilter
1750     imdct15
1751     intrax8
1752     iso_media
1753     ividsp
1754     jpegtables
1755     libx262
1756     lgplv3
1757     lpc
1758     lzf
1759     me_cmp
1760     mpeg_er
1761     mpegaudio
1762     mpegaudiodsp
1763     mpegaudioheader
1764     mpegvideo
1765     mpegvideoenc
1766     mss34dsp
1767     pixblockdsp
1768     qpeldsp
1769     qsv
1770     qsvdec
1771     qsvenc
1772     rangecoder
1773     riffdec
1774     riffenc
1775     rtpdec
1776     rtpenc_chain
1777     rv34dsp
1778     sinewin
1779     snappy
1780     srtp
1781     startcode
1782     texturedsp
1783     texturedspenc
1784     tpeldsp
1785     vaapi_encode
1786     vc1dsp
1787     videodsp
1788     vp3dsp
1789     vp56dsp
1790     vp8dsp
1791     wma_freqs
1792     wmv2dsp
1793 "
1794
1795 CMDLINE_SELECT="
1796     $ARCH_EXT_LIST
1797     $CONFIG_LIST
1798     $HAVE_LIST_CMDLINE
1799     $THREADS_LIST
1800     asm
1801     cross_compile
1802     debug
1803     extra_warnings
1804     logging
1805     lto
1806     optimizations
1807     rpath
1808 "
1809
1810 PATHS_LIST="
1811     bindir
1812     datadir
1813     docdir
1814     incdir
1815     libdir
1816     mandir
1817     prefix
1818     shlibdir
1819 "
1820
1821 CMDLINE_SET="
1822     $PATHS_LIST
1823     ar
1824     arch
1825     as
1826     cc
1827     objcc
1828     cpu
1829     cross_prefix
1830     custom_allocator
1831     dep_cc
1832     env
1833     extra_version
1834     host_cc
1835     host_cflags
1836     host_extralibs
1837     host_ld
1838     host_ldflags
1839     host_os
1840     ignore_tests
1841     ld
1842     logfile
1843     malloc_prefix
1844     nm
1845     optflags
1846     pkg_config
1847     pkg_config_flags
1848     random_seed
1849     samples
1850     sysinclude
1851     sysroot
1852     target_exec
1853     target_os
1854     target_path
1855     target_samples
1856     toolchain
1857 "
1858
1859 CMDLINE_APPEND="
1860     extra_cflags
1861     extra_objcflags
1862     host_cppflags
1863 "
1864
1865 # code dependency declarations
1866
1867 # architecture extensions
1868
1869 armv5te_deps="arm"
1870 armv6_deps="arm"
1871 armv6t2_deps="arm"
1872 armv8_deps="aarch64"
1873 neon_deps_any="aarch64 arm"
1874 intrinsics_neon_deps="neon"
1875 vfp_deps_any="aarch64 arm"
1876 vfpv3_deps="vfp"
1877
1878 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1879
1880 altivec_deps="ppc"
1881 ppc4xx_deps="ppc"
1882 vsx_deps="altivec"
1883 power8_deps="vsx"
1884
1885 cpunop_deps="i686"
1886 x86_64_select="i686"
1887 x86_64_suggest="fast_cmov"
1888
1889 amd3dnow_deps="mmx"
1890 amd3dnowext_deps="amd3dnow"
1891 i686_deps="x86"
1892 mmx_deps="x86"
1893 mmxext_deps="mmx"
1894 sse_deps="mmxext"
1895 sse2_deps="sse"
1896 sse3_deps="sse2"
1897 ssse3_deps="sse3"
1898 sse4_deps="ssse3"
1899 sse42_deps="sse4"
1900 avx_deps="sse42"
1901 xop_deps="avx"
1902 fma3_deps="avx"
1903 fma4_deps="avx"
1904 avx2_deps="avx"
1905
1906 mmx_external_deps="yasm"
1907 mmx_inline_deps="inline_asm"
1908 mmx_suggest="mmx_external mmx_inline"
1909
1910 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1911     eval dep=\$${ext}_deps
1912     eval ${ext}_external_deps='"${dep}_external"'
1913     eval ${ext}_inline_deps='"${dep}_inline"'
1914     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1915 done
1916
1917 aligned_stack_if_any="aarch64 ppc x86"
1918 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1919 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1920 fast_unaligned_if_any="aarch64 ppc x86"
1921 simd_align_16_if_any="altivec neon sse"
1922 simd_align_32_if_any="avx"
1923
1924 # system capabilities
1925 symver_if_any="symver_asm_label symver_gnu_asm"
1926 valgrind_backtrace_conflict="optimizations"
1927 valgrind_backtrace_deps="valgrind_valgrind_h"
1928
1929 # threading support
1930 atomics_gcc_if="sync_val_compare_and_swap"
1931 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1932 atomics_win32_if="MemoryBarrier"
1933 atomics_native_if_any="$ATOMICS_LIST"
1934 w32threads_deps="atomics_native"
1935 threads_if_any="$THREADS_LIST"
1936
1937 # subsystems
1938 dct_select="rdft"
1939 dirac_parse_select="golomb"
1940 error_resilience_select="me_cmp"
1941 faandct_deps="faan fdctdsp"
1942 faanidct_deps="faan idctdsp"
1943 h264dsp_select="startcode"
1944 hevc_ps_select="golomb"
1945 intrax8_select="blockdsp idctdsp"
1946 mdct_select="fft"
1947 rdft_select="fft"
1948 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1949 mpeg_er_select="error_resilience"
1950 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1951 mpegaudiodsp_select="dct"
1952 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1953 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1954 vc1dsp_select="h264chroma qpeldsp startcode"
1955
1956 # decoders / encoders
1957 aac_decoder_select="imdct15 mdct sinewin"
1958 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1959 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1960 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1961 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1962 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1963 adpcm_g722_decoder_select="g722dsp"
1964 adpcm_g722_encoder_select="g722dsp"
1965 aic_decoder_select="golomb idctdsp"
1966 alac_encoder_select="lpc"
1967 als_decoder_select="bswapdsp"
1968 amrnb_decoder_select="lsp"
1969 amrwb_decoder_select="lsp"
1970 amv_decoder_select="sp5x_decoder"
1971 ape_decoder_select="bswapdsp"
1972 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1973 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1974 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1975 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1976 atrac1_decoder_select="mdct sinewin"
1977 atrac3_decoder_select="mdct"
1978 atrac3p_decoder_select="mdct sinewin"
1979 bink_decoder_select="blockdsp hpeldsp"
1980 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1981 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1982 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1983 cllc_decoder_select="bswapdsp"
1984 comfortnoise_encoder_select="lpc"
1985 cook_decoder_select="audiodsp mdct sinewin"
1986 cscd_decoder_select="lzo"
1987 cscd_decoder_suggest="zlib"
1988 dca_decoder_select="fmtconvert mdct"
1989 dds_decoder_select="texturedsp"
1990 dnxhd_decoder_select="blockdsp idctdsp"
1991 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1992 dvvideo_decoder_select="dvprofile idctdsp"
1993 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1994 dxa_decoder_deps="zlib"
1995 dxv_decoder_select="lzf texturedsp"
1996 eac3_decoder_select="ac3_decoder"
1997 eac3_encoder_select="ac3_encoder"
1998 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1999 eatgq_decoder_select="aandcttables idctdsp"
2000 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2001 exr_decoder_deps="zlib"
2002 ffv1_decoder_select="rangecoder"
2003 ffv1_encoder_select="rangecoder"
2004 ffvhuff_decoder_select="huffyuv_decoder"
2005 ffvhuff_encoder_select="huffyuv_encoder"
2006 fic_decoder_select="golomb"
2007 flac_decoder_select="flacdsp"
2008 flac_encoder_select="bswapdsp flacdsp lpc"
2009 flashsv_decoder_deps="zlib"
2010 flashsv_encoder_deps="zlib"
2011 flashsv2_decoder_deps="zlib"
2012 flv_decoder_select="h263_decoder"
2013 flv_encoder_select="h263_encoder"
2014 fourxm_decoder_select="blockdsp bswapdsp"
2015 fraps_decoder_select="bswapdsp huffman"
2016 g2m_decoder_deps="zlib"
2017 g2m_decoder_select="blockdsp idctdsp jpegtables"
2018 h261_decoder_select="mpeg_er mpegvideo"
2019 h261_encoder_select="aandcttables mpegvideoenc"
2020 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2021 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2022 h263i_decoder_select="h263_decoder"
2023 h263p_encoder_select="h263_encoder"
2024 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2025 h264_decoder_suggest="error_resilience"
2026 hap_decoder_select="snappy texturedsp"
2027 hap_encoder_deps="libsnappy"
2028 hap_encoder_select="texturedspenc"
2029 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2030 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2031 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2032 iac_decoder_select="imc_decoder"
2033 imc_decoder_select="bswapdsp fft mdct sinewin"
2034 indeo3_decoder_select="hpeldsp"
2035 indeo4_decoder_select="ividsp"
2036 indeo5_decoder_select="ividsp"
2037 interplay_video_decoder_select="hpeldsp"
2038 jpegls_decoder_select="mjpeg_decoder"
2039 jv_decoder_select="blockdsp"
2040 lagarith_decoder_select="huffyuvdsp"
2041 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2042 magicyuv_decoder_select="huffyuvdsp"
2043 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2044 metasound_decoder_select="lsp mdct sinewin"
2045 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2046 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2047 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2048 mjpegb_decoder_select="mjpeg_decoder"
2049 mlp_decoder_select="mlp_parser"
2050 motionpixels_decoder_select="bswapdsp"
2051 mp1_decoder_select="mpegaudio"
2052 mp1float_decoder_select="mpegaudio"
2053 mp2_decoder_select="mpegaudio"
2054 mp2float_decoder_select="mpegaudio"
2055 mp3_decoder_select="mpegaudio"
2056 mp3adu_decoder_select="mpegaudio"
2057 mp3adufloat_decoder_select="mpegaudio"
2058 mp3float_decoder_select="mpegaudio"
2059 mp3on4_decoder_select="mpegaudio"
2060 mp3on4float_decoder_select="mpegaudio"
2061 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2062 mpc8_decoder_select="mpegaudiodsp"
2063 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2064 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2065 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2066 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2067 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2068 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2069 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2070 mpeg4_encoder_select="h263_encoder"
2071 msa1_decoder_select="mss34dsp"
2072 msmpeg4v1_decoder_select="h263_decoder"
2073 msmpeg4v2_decoder_select="h263_decoder"
2074 msmpeg4v2_encoder_select="h263_encoder"
2075 msmpeg4v3_decoder_select="h263_decoder"
2076 msmpeg4v3_encoder_select="h263_encoder"
2077 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2078 mts2_decoder_select="mss34dsp"
2079 mxpeg_decoder_select="mjpeg_decoder"
2080 nellymoser_decoder_select="mdct sinewin"
2081 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2082 nuv_decoder_select="idctdsp lzo"
2083 on2avc_decoder_select="mdct"
2084 opus_decoder_deps="avresample"
2085 opus_decoder_select="imdct15"
2086 png_decoder_deps="zlib"
2087 png_encoder_deps="zlib"
2088 png_encoder_select="huffyuvencdsp"
2089 prores_decoder_select="idctdsp"
2090 prores_encoder_select="fdctdsp"
2091 qcelp_decoder_select="lsp"
2092 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2093 ra_144_encoder_select="audio_frame_queue lpc"
2094 ralf_decoder_select="golomb"
2095 rscc_decoder_deps="zlib"
2096 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2097 rv10_encoder_select="h263_encoder"
2098 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2099 rv20_encoder_select="h263_encoder"
2100 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2101 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2102 screenpresso_decoder_deps="zlib"
2103 sipr_decoder_select="lsp"
2104 sp5x_decoder_select="mjpeg_decoder"
2105 svq1_decoder_select="hpeldsp"
2106 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2107 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2108 svq3_decoder_suggest="zlib"
2109 tak_decoder_select="audiodsp"
2110 tdsc_decoder_deps="zlib"
2111 tdsc_decoder_select="mjpeg_decoder"
2112 theora_decoder_select="vp3_decoder"
2113 thp_decoder_select="mjpeg_decoder"
2114 tiff_decoder_suggest="zlib"
2115 tiff_encoder_suggest="zlib"
2116 truehd_decoder_select="mlp_decoder"
2117 truemotion2_decoder_select="bswapdsp"
2118 truespeech_decoder_select="bswapdsp"
2119 tscc_decoder_deps="zlib"
2120 txd_decoder_select="texturedsp"
2121 twinvq_decoder_select="mdct lsp sinewin"
2122 utvideo_decoder_select="bswapdsp"
2123 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2124 vble_decoder_select="huffyuvdsp"
2125 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2126 vc1image_decoder_select="vc1_decoder"
2127 vorbis_decoder_select="mdct"
2128 vorbis_encoder_select="mdct"
2129 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2130 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2131 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2132 vp6a_decoder_select="vp6_decoder"
2133 vp6f_decoder_select="vp6_decoder"
2134 vp7_decoder_select="h264pred videodsp vp8dsp"
2135 vp8_decoder_select="h264pred videodsp vp8dsp"
2136 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2137 webp_decoder_select="vp8_decoder"
2138 wmapro_decoder_select="mdct sinewin wma_freqs"
2139 wmav1_decoder_select="mdct sinewin wma_freqs"
2140 wmav1_encoder_select="mdct sinewin wma_freqs"
2141 wmav2_decoder_select="mdct sinewin wma_freqs"
2142 wmav2_encoder_select="mdct sinewin wma_freqs"
2143 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2144 wmv1_decoder_select="h263_decoder"
2145 wmv1_encoder_select="h263_encoder"
2146 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2147 wmv2_encoder_select="h263_encoder wmv2dsp"
2148 wmv3_decoder_select="vc1_decoder"
2149 wmv3image_decoder_select="wmv3_decoder"
2150 zerocodec_decoder_deps="zlib"
2151 zlib_decoder_deps="zlib"
2152 zlib_encoder_deps="zlib"
2153 zmbv_decoder_deps="zlib"
2154 zmbv_encoder_deps="zlib"
2155
2156 # hardware accelerators
2157 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2158 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2159 dxva2_lib_deps="dxva2"
2160 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2161 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2162
2163 h263_vaapi_hwaccel_deps="vaapi"
2164 h263_vaapi_hwaccel_select="h263_decoder"
2165 h264_d3d11va_hwaccel_deps="d3d11va"
2166 h264_d3d11va_hwaccel_select="h264_decoder"
2167 h264_dxva2_hwaccel_deps="dxva2"
2168 h264_dxva2_hwaccel_select="h264_decoder"
2169 h264_mmal_hwaccel_deps="mmal"
2170 h264_qsv_hwaccel_deps="libmfx"
2171 h264_vaapi_hwaccel_deps="vaapi"
2172 h264_vaapi_hwaccel_select="h264_decoder"
2173 h264_vda_hwaccel_deps="vda"
2174 h264_vda_hwaccel_select="h264_decoder"
2175 h264_vda_old_hwaccel_deps="vda"
2176 h264_vda_old_hwaccel_select="h264_decoder"
2177 h264_vdpau_hwaccel_deps="vdpau"
2178 h264_vdpau_hwaccel_select="h264_decoder"
2179 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2180 hevc_d3d11va_hwaccel_select="hevc_decoder"
2181 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2182 hevc_dxva2_hwaccel_select="hevc_decoder"
2183 hevc_qsv_hwaccel_deps="libmfx"
2184 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2185 hevc_vaapi_hwaccel_select="hevc_decoder"
2186 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2187 hevc_vdpau_hwaccel_select="hevc_decoder"
2188 mpeg1_vdpau_hwaccel_deps="vdpau"
2189 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2190 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2191 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2192 mpeg2_dxva2_hwaccel_deps="dxva2"
2193 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2194 mpeg2_mmal_hwaccel_deps="mmal"
2195 mpeg2_qsv_hwaccel_deps="libmfx"
2196 mpeg2_vaapi_hwaccel_deps="vaapi"
2197 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2198 mpeg2_vdpau_hwaccel_deps="vdpau"
2199 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2200 mpeg4_vaapi_hwaccel_deps="vaapi"
2201 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2202 mpeg4_vdpau_hwaccel_deps="vdpau"
2203 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2204 vc1_d3d11va_hwaccel_deps="d3d11va"
2205 vc1_d3d11va_hwaccel_select="vc1_decoder"
2206 vc1_dxva2_hwaccel_deps="dxva2"
2207 vc1_dxva2_hwaccel_select="vc1_decoder"
2208 vc1_mmal_hwaccel_deps="mmal"
2209 vc1_qsv_hwaccel_deps="libmfx"
2210 vc1_vaapi_hwaccel_deps="vaapi"
2211 vc1_vaapi_hwaccel_select="vc1_decoder"
2212 vc1_vdpau_hwaccel_deps="vdpau"
2213 vc1_vdpau_hwaccel_select="vc1_decoder"
2214 vp8_qsv_hwaccel_deps="libmfx"
2215 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2216 vp8_vaapi_hwaccel_select="vp8_decoder"
2217 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2218 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2219 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2220 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2221
2222 # hardware-accelerated codecs
2223 nvenc_deps_any="dlopen LoadLibrary"
2224 nvenc_extralibs='$ldl'
2225 omx_deps="dlopen pthreads"
2226 omx_extralibs='$ldl'
2227 omx_rpi_select="omx"
2228 qsvdec_select="qsv"
2229 qsvenc_select="qsv"
2230 vaapi_encode_deps="vaapi"
2231
2232 hwupload_cuda_filter_deps="cuda"
2233 scale_npp_filter_deps="cuda libnpp"
2234
2235 h264_mmal_decoder_deps="mmal"
2236 h264_nvenc_encoder_deps="nvenc"
2237 h264_omx_encoder_deps="omx"
2238 h264_qsv_decoder_deps="libmfx"
2239 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2240 h264_qsv_encoder_deps="libmfx"
2241 h264_qsv_encoder_select="qsvenc"
2242 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2243 h264_vaapi_encoder_select="vaapi_encode golomb"
2244 hevc_nvenc_encoder_deps="nvenc"
2245 hevc_qsv_decoder_deps="libmfx"
2246 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2247 hevc_qsv_encoder_deps="libmfx"
2248 hevc_qsv_encoder_select="hevc_ps qsvenc"
2249 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2250 hevc_vaapi_encoder_select="vaapi_encode golomb"
2251 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2252 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2253 mpeg2_mmal_decoder_deps="mmal"
2254 mpeg2_qsv_decoder_deps="libmfx"
2255 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2256 mpeg2_qsv_encoder_deps="libmfx"
2257 mpeg2_qsv_encoder_select="qsvenc"
2258 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2259 mpeg2_vaapi_encoder_select="vaapi_encode"
2260 mpeg4_omx_encoder_deps="omx"
2261 vc1_mmal_decoder_deps="mmal"
2262 vc1_qsv_decoder_deps="libmfx"
2263 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2264 vp8_qsv_decoder_deps="libmfx"
2265 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2266 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2267 vp8_vaapi_encoder_select="vaapi_encode"
2268
2269 nvenc_h264_encoder_select="h264_nvenc_encoder"
2270 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2271
2272 # parsers
2273 h264_parser_select="golomb h264dsp h264parse"
2274 hevc_parser_select="hevc_ps"
2275 mpegaudio_parser_select="mpegaudioheader"
2276 mpegvideo_parser_select="mpegvideo"
2277 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2278 vc1_parser_select="vc1dsp"
2279
2280 # bitstream_filters
2281 mjpeg2jpeg_bsf_select="jpegtables"
2282
2283 # external libraries
2284 avisynth_deps="LoadLibrary"
2285 avxsynth_deps="dlopen"
2286 avisynth_demuxer_deps_any="avisynth avxsynth"
2287 avisynth_demuxer_select="riffdec"
2288 libdcadec_decoder_deps="libdcadec"
2289 libfaac_encoder_deps="libfaac"
2290 libfaac_encoder_select="audio_frame_queue"
2291 libfdk_aac_decoder_deps="libfdk_aac"
2292 libfdk_aac_encoder_deps="libfdk_aac"
2293 libfdk_aac_encoder_select="audio_frame_queue"
2294 libgsm_decoder_deps="libgsm"
2295 libgsm_encoder_deps="libgsm"
2296 libgsm_ms_decoder_deps="libgsm"
2297 libgsm_ms_encoder_deps="libgsm"
2298 libilbc_decoder_deps="libilbc"
2299 libilbc_encoder_deps="libilbc"
2300 libkvazaar_encoder_deps="libkvazaar"
2301 libmp3lame_encoder_deps="libmp3lame"
2302 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2303 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2304 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2305 libopencore_amrnb_encoder_select="audio_frame_queue"
2306 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2307 libopenh264_decoder_deps="libopenh264"
2308 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2309 libopenh264_encoder_deps="libopenh264"
2310 libopenjpeg_decoder_deps="libopenjpeg"
2311 libopenjpeg_encoder_deps="libopenjpeg"
2312 libopus_decoder_deps="libopus"
2313 libopus_encoder_deps="libopus"
2314 libopus_encoder_select="audio_frame_queue"
2315 libschroedinger_decoder_deps="libschroedinger"
2316 libschroedinger_encoder_deps="libschroedinger"
2317 libspeex_decoder_deps="libspeex"
2318 libspeex_encoder_deps="libspeex"
2319 libspeex_encoder_select="audio_frame_queue"
2320 libtheora_encoder_deps="libtheora"
2321 libtwolame_encoder_deps="libtwolame"
2322 libvo_aacenc_encoder_deps="libvo_aacenc"
2323 libvo_aacenc_encoder_select="audio_frame_queue"
2324 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2325 libvorbis_encoder_deps="libvorbis"
2326 libvorbis_encoder_select="audio_frame_queue"
2327 libvpx_vp8_decoder_deps="libvpx"
2328 libvpx_vp8_encoder_deps="libvpx"
2329 libvpx_vp9_decoder_deps="libvpx"
2330 libvpx_vp9_encoder_deps="libvpx"
2331 libwavpack_encoder_deps="libwavpack"
2332 libwavpack_encoder_select="audio_frame_queue"
2333 libwebp_encoder_deps="libwebp"
2334 libx262_encoder_deps="libx262"
2335 libx264_encoder_deps="libx264"
2336 libx265_encoder_deps="libx265"
2337 libxavs_encoder_deps="libxavs"
2338 libxvid_encoder_deps="libxvid mkstemp"
2339
2340 # demuxers / muxers
2341 ac3_demuxer_select="ac3_parser"
2342 asf_demuxer_select="riffdec"
2343 asf_muxer_select="riffenc"
2344 asf_stream_muxer_select="asf_muxer"
2345 avi_demuxer_select="iso_media riffdec"
2346 avi_muxer_select="riffenc"
2347 caf_demuxer_select="iso_media riffdec"
2348 dash_muxer_select="mp4_muxer"
2349 dirac_demuxer_select="dirac_parser"
2350 dv_demuxer_select="dvprofile"
2351 dv_muxer_select="dvprofile"
2352 dxa_demuxer_select="riffdec"
2353 eac3_demuxer_select="ac3_parser"
2354 f4v_muxer_select="mov_muxer"
2355 flac_demuxer_select="flac_parser"
2356 hds_muxer_select="flv_muxer"
2357 hls_muxer_select="mpegts_muxer"
2358 ipod_muxer_select="mov_muxer"
2359 ismv_muxer_select="mov_muxer"
2360 matroska_audio_muxer_select="matroska_muxer"
2361 matroska_demuxer_select="iso_media riffdec"
2362 matroska_demuxer_suggest="bzlib lzo zlib"
2363 matroska_muxer_select="iso_media riffenc"
2364 mmf_muxer_select="riffenc"
2365 mov_demuxer_select="iso_media riffdec"
2366 mov_demuxer_suggest="zlib"
2367 mov_muxer_select="iso_media riffenc rtpenc_chain"
2368 mp3_demuxer_select="mpegaudio_parser"
2369 mp3_muxer_select="mpegaudioheader"
2370 mp4_muxer_select="mov_muxer"
2371 mpegts_demuxer_select="iso_media"
2372 mpegts_muxer_select="adts_muxer latm_muxer"
2373 mpegtsraw_demuxer_select="mpegts_demuxer"
2374 mxf_d10_muxer_select="mxf_muxer"
2375 nut_muxer_select="riffenc"
2376 nuv_demuxer_select="riffdec"
2377 oga_muxer_select="ogg_muxer"
2378 ogg_demuxer_select="dirac_parse"
2379 opus_muxer_select="ogg_muxer"
2380 psp_muxer_select="mov_muxer"
2381 rtp_demuxer_select="sdp_demuxer"
2382 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2383 rtsp_demuxer_select="http_protocol rtpdec"
2384 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2385 sap_demuxer_select="sdp_demuxer"
2386 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2387 sdp_demuxer_select="rtpdec"
2388 smoothstreaming_muxer_select="ismv_muxer"
2389 spdif_muxer_select="aac_parser"
2390 spx_muxer_select="ogg_muxer"
2391 swf_demuxer_suggest="zlib"
2392 tak_demuxer_select="tak_parser"
2393 tg2_muxer_select="mov_muxer"
2394 tgp_muxer_select="mov_muxer"
2395 w64_demuxer_select="wav_demuxer"
2396 wav_demuxer_select="riffdec"
2397 wav_muxer_select="riffenc"
2398 webm_muxer_select="iso_media riffenc"
2399 wtv_demuxer_select="mpegts_demuxer riffdec"
2400 xmv_demuxer_select="riffdec"
2401 xwma_demuxer_select="riffdec"
2402
2403 # indevs / outdevs
2404 alsa_indev_deps="alsa"
2405 alsa_outdev_deps="alsa"
2406 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2407 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2408 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2409 dv1394_indev_deps="dv1394"
2410 dv1394_indev_select="dv_demuxer"
2411 fbdev_indev_deps="linux_fb_h"
2412 jack_indev_deps="jack"
2413 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2414 libcdio_indev_deps="libcdio"
2415 libdc1394_indev_deps="libdc1394"
2416 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2417 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2418 pulse_indev_deps="libpulse"
2419 sndio_indev_deps="sndio"
2420 sndio_outdev_deps="sndio"
2421 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2422 vfwcap_indev_deps="vfw32 vfwcap_defines"
2423 xcbgrab_indev_deps="libxcb"
2424 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2425
2426 # protocols
2427 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2428 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2429 ffrtmpcrypt_protocol_select="tcp_protocol"
2430 ffrtmphttp_protocol_conflict="librtmp_protocol"
2431 ffrtmphttp_protocol_select="http_protocol"
2432 gopher_protocol_select="network"
2433 http_protocol_select="tcp_protocol"
2434 httpproxy_protocol_select="tcp_protocol"
2435 https_protocol_select="tls_protocol"
2436 icecast_protocol_select="http_protocol"
2437 librtmp_protocol_deps="librtmp"
2438 librtmpe_protocol_deps="librtmp"
2439 librtmps_protocol_deps="librtmp"
2440 librtmpt_protocol_deps="librtmp"
2441 librtmpte_protocol_deps="librtmp"
2442 mmsh_protocol_select="http_protocol"
2443 mmst_protocol_select="network"
2444 rtmp_protocol_conflict="librtmp_protocol"
2445 rtmp_protocol_select="tcp_protocol"
2446 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2447 rtmps_protocol_conflict="librtmp_protocol"
2448 rtmps_protocol_select="tls_protocol"
2449 rtmpt_protocol_select="ffrtmphttp_protocol"
2450 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2451 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2452 rtp_protocol_select="udp_protocol"
2453 sctp_protocol_deps="struct_sctp_event_subscribe"
2454 sctp_protocol_select="network"
2455 srtp_protocol_select="rtp_protocol srtp"
2456 tcp_protocol_select="network"
2457 tls_gnutls_protocol_deps="gnutls"
2458 tls_gnutls_protocol_select="tcp_protocol"
2459 tls_openssl_protocol_conflict="tls_gnutls_protocol"
2460 tls_openssl_protocol_deps="openssl"
2461 tls_openssl_protocol_select="tcp_protocol"
2462 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2463 udp_protocol_select="network"
2464 unix_protocol_deps="sys_un_h"
2465 unix_protocol_select="network"
2466
2467 # filters
2468 asyncts_filter_deps="avresample"
2469 blackframe_filter_deps="gpl"
2470 boxblur_filter_deps="gpl"
2471 bs2b_filter_deps="libbs2b"
2472 cropdetect_filter_deps="gpl"
2473 deinterlace_qsv_filter_deps="libmfx"
2474 deinterlace_vaapi_filter_deps="vaapi"
2475 delogo_filter_deps="gpl"
2476 drawtext_filter_deps="libfreetype"
2477 drawtext_filter_suggest="libfontconfig"
2478 frei0r_filter_deps="frei0r dlopen"
2479 frei0r_filter_extralibs='$ldl'
2480 frei0r_src_filter_deps="frei0r dlopen"
2481 frei0r_src_filter_extralibs='$ldl'
2482 hdcd_filter_deps="libhdcd"
2483 hqdn3d_filter_deps="gpl"
2484 interlace_filter_deps="gpl"
2485 movie_filter_deps="avcodec avformat"
2486 ocv_filter_deps="libopencv"
2487 resample_filter_deps="avresample"
2488 scale_filter_deps="swscale"
2489 scale_qsv_filter_deps="libmfx"
2490 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2491
2492 # examples
2493 decode_audio_example_deps="avcodec avutil"
2494 decode_video_example_deps="avcodec avutil"
2495 encode_audio_example_deps="avcodec avutil"
2496 encode_video_example_deps="avcodec avutil"
2497 filter_audio_example_deps="avfilter avutil"
2498 metadata_example_deps="avformat avutil"
2499 output_example_deps="avcodec avformat avresample avutil swscale"
2500 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2501 transcode_aac_example_deps="avcodec avformat avresample"
2502
2503 # libraries, in linking order
2504 avcodec_deps="avutil"
2505 avcodec_select="null_bsf"
2506 avdevice_deps="avformat avcodec avutil"
2507 avfilter_deps="avutil"
2508 avformat_deps="avcodec avutil"
2509 avformat_suggest="network"
2510 avresample_deps="avutil"
2511 swscale_deps="avutil"
2512
2513 # programs
2514 avconv_deps="avcodec avfilter avformat avresample swscale"
2515 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2516                fps_filter null_filter resample_filter scale_filter
2517                trim_filter"
2518 avplay_deps="avcodec avfilter avformat avresample sdl"
2519 avplay_extralibs='$sdl_extralibs'
2520 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2521 avprobe_deps="avcodec avformat"
2522
2523 # documentation
2524 pod2man_deps="doc"
2525 texi2html_deps="doc"
2526
2527 # default parameters
2528
2529 logfile="avbuild/config.log"
2530
2531 # installation paths
2532 prefix_default="/usr/local"
2533 bindir_default='${prefix}/bin'
2534 datadir_default='${prefix}/share/avconv'
2535 docdir_default='${prefix}/share/doc/libav'
2536 incdir_default='${prefix}/include'
2537 libdir_default='${prefix}/lib'
2538 mandir_default='${prefix}/share/man'
2539 shlibdir_default="$libdir_default"
2540
2541 # toolchain
2542 ar_default="ar"
2543 cc_default="gcc"
2544 host_cc_default="gcc"
2545 ln_s="ln -s -f"
2546 nm_default="nm -g"
2547 objformat="elf"
2548 pkg_config_default=pkg-config
2549 ranlib="ranlib"
2550 strip="strip"
2551 version_script='--version-script'
2552 yasmexe="yasm"
2553
2554 # machine
2555 arch_default=$(uname -m)
2556 cpu="generic"
2557 intrinsics="none"
2558
2559 # OS
2560 target_os_default=$(tolower $(uname -s))
2561 host_os=$target_os_default
2562
2563 # configurable options
2564 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2565
2566 enable asm
2567 enable debug
2568 enable doc
2569 enable faan faandct faanidct
2570 enable optimizations
2571 enable safe_bitstream_reader
2572 enable static
2573 enable swscale_alpha
2574 enable valgrind_backtrace
2575
2576 # By default, enable only those hwaccels that have no external dependencies.
2577 enable d3d11va dxva2 vda vdpau
2578
2579 # build settings
2580 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2581 LIBPREF="lib"
2582 LIBSUF=".a"
2583 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2584 SLIBPREF="lib"
2585 SLIBSUF=".so"
2586 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2587 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2588 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2589 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2590 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2591 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2592 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2593
2594 asflags_filter=echo
2595 cflags_filter=echo
2596 ldflags_filter=echo
2597
2598 AS_C='-c'
2599 AS_O='-o $@'
2600 CC_C='-c'
2601 CC_E='-E -o $@'
2602 CC_O='-o $@'
2603 OBJCC_C='-c'
2604 OBJCC_E='-E -o $@'
2605 OBJCC_O='-o $@'
2606 LD_O='-o $@'
2607 LD_LIB='-l%'
2608 LD_PATH='-L'
2609 HOSTCC_C='-c'
2610 HOSTCC_E='-E -o $@'
2611 HOSTCC_O='-o $@'
2612 HOSTLD_O='-o $@'
2613
2614 host_extralibs='-lm'
2615 host_cflags_filter=echo
2616 host_ldflags_filter=echo
2617
2618 target_path='$(CURDIR)'
2619
2620 # since the object filename is not given with the -MM flag, the compiler
2621 # is only able to print the basename, and we must add the path ourselves
2622 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2623 DEPFLAGS='-MM'
2624
2625 mkdir -p avbuild
2626
2627 # find source path
2628 if test -f configure; then
2629     source_path=.
2630 else
2631     source_path=$(cd $(dirname "$0"); pwd)
2632     echo "$source_path" | grep -q '[[:blank:]]' &&
2633         die "Out of tree builds are impossible with whitespace in source path."
2634     test -e "$source_path/config.h" &&
2635         die "Out of tree builds are impossible with config.h in source dir."
2636 fi
2637
2638 for v in "$@"; do
2639     r=${v#*=}
2640     l=${v%"$r"}
2641     r=$(sh_quote "$r")
2642     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2643 done
2644
2645 find_things(){
2646     thing=$1
2647     pattern=$2
2648     file=$source_path/$3
2649     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2650 }
2651
2652 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2653 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2654 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2655 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2656 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2657 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2658 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2659 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2660 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2661
2662 find_things_extern(){
2663     thing=$1
2664     pattern=$2
2665     file=$source_path/$3
2666     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2667 }
2668
2669 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2670 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2671
2672 ALL_COMPONENTS="
2673     $BSF_LIST
2674     $DECODER_LIST
2675     $DEMUXER_LIST
2676     $ENCODER_LIST
2677     $FILTER_LIST
2678     $HWACCEL_LIST
2679     $INDEV_LIST
2680     $MUXER_LIST
2681     $OUTDEV_LIST
2682     $PARSER_LIST
2683     $PROTOCOL_LIST
2684 "
2685
2686 for n in $COMPONENT_LIST; do
2687     v=$(toupper ${n%s})_LIST
2688     eval enable \$$v
2689     eval ${n}_if_any="\$$v"
2690 done
2691
2692 enable $ARCH_EXT_LIST
2693
2694 die_unknown(){
2695     echo "Unknown option \"$1\"."
2696     echo "See $0 --help for available options."
2697     exit 1
2698 }
2699
2700 print_3_columns() {
2701     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2702 }
2703
2704 show_list() {
2705     suffix=_$1
2706     shift
2707     echo $* | sed s/$suffix//g | print_3_columns
2708     exit 0
2709 }
2710
2711 rand_list(){
2712     IFS=', '
2713     set -- $*
2714     unset IFS
2715     for thing; do
2716         comp=${thing%:*}
2717         prob=${thing#$comp}
2718         prob=${prob#:}
2719         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2720         echo "prob ${prob:-0.5}"
2721         printf '%s\n' $comp
2722     done
2723 }
2724
2725 do_random(){
2726     action=$1
2727     shift
2728     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2729     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2730 }
2731
2732 for opt do
2733     optval="${opt#*=}"
2734     case "$opt" in
2735         --extra-ldflags=*)
2736             add_ldflags $optval
2737         ;;
2738         --extra-ldexeflags=*)
2739             add_ldexeflags $optval
2740         ;;
2741         --extra-libs=*)
2742             add_extralibs $optval
2743         ;;
2744         --disable-devices)
2745             disable $INDEV_LIST $OUTDEV_LIST
2746         ;;
2747         --enable-debug=*)
2748             debuglevel="$optval"
2749         ;;
2750         --disable-programs)
2751             disable $PROGRAM_LIST
2752         ;;
2753         --disable-everything)
2754             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2755         ;;
2756         --disable-all)
2757             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2758             disable $LIBRARY_LIST $PROGRAM_LIST doc
2759         ;;
2760         --enable-random|--disable-random)
2761             action=${opt%%-random}
2762             do_random ${action#--} $COMPONENT_LIST
2763         ;;
2764         --enable-random=*|--disable-random=*)
2765             action=${opt%%-random=*}
2766             do_random ${action#--} $optval
2767         ;;
2768         --enable-*=*|--disable-*=*)
2769             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2770             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2771             eval list=\$$(toupper $thing)_LIST
2772             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2773             $action $(filter "$name" $list)
2774         ;;
2775         --enable-avserver|--disable-avserver*)
2776             warn "avserver has been removed, the ${opt} option is only"\
2777                  "provided for compatibility and will be removed in the future"
2778         ;;
2779         --enable-?*|--disable-?*)
2780             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2781             if is_in $option $COMPONENT_LIST; then
2782                 test $action = disable && action=unset
2783                 eval $action \$$(toupper ${option%s})_LIST
2784             elif is_in $option $CMDLINE_SELECT; then
2785                 $action $option
2786             else
2787                 die_unknown $opt
2788             fi
2789         ;;
2790         --list-*)
2791             NAME="${opt#--list-}"
2792             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2793             NAME=${NAME%s}
2794             eval show_list $NAME \$$(toupper $NAME)_LIST
2795         ;;
2796         --help|-h) show_help
2797         ;;
2798         --quiet|-q) quiet=yes
2799         ;;
2800         *)
2801             optname="${opt%%=*}"
2802             optname="${optname#--}"
2803             optname=$(echo "$optname" | sed 's/-/_/g')
2804             if is_in $optname $CMDLINE_SET; then
2805                 eval $optname='$optval'
2806             elif is_in $optname $CMDLINE_APPEND; then
2807                 append $optname "$optval"
2808             else
2809                 die_unknown $opt
2810             fi
2811         ;;
2812     esac
2813 done
2814
2815 for e in $env; do
2816     eval "export $e"
2817 done
2818
2819 disabled logging && logfile=/dev/null
2820
2821 # Die early if licensing-related configure options are incompatible.
2822 die_license_disabled() {
2823     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2824 }
2825
2826 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2827 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2828 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2829
2830 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2831
2832 # Disable all the library-specific components if the library itself
2833 # is disabled, see AVCODEC_LIST and following _LIST variables.
2834
2835 disable_components(){
2836     disabled ${1} && disable $(
2837         eval components="\$$(toupper ${1})_COMPONENTS"
2838         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2839     )
2840 }
2841
2842 map 'disable_components $v' $LIBRARY_LIST
2843
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"$debuglevel"
4830
4831 # add some useful compiler flags if supported
4832 check_cflags -Wdeclaration-after-statement
4833 check_cflags -Wall
4834 check_cflags -Wdisabled-optimization
4835 check_cflags -Wpointer-arith
4836 check_cflags -Wredundant-decls
4837 check_cflags -Wwrite-strings
4838 check_cflags -Wtype-limits
4839 check_cflags -Wundef
4840 check_cflags -Wmissing-prototypes
4841 check_cflags -Wstrict-prototypes
4842
4843 if enabled extra_warnings; then
4844     check_cflags -Wcast-qual
4845     check_cflags -Wextra
4846     check_cflags -Wpedantic
4847 fi
4848
4849 check_disable_warning(){
4850     warning_flag=-W${1#-Wno-}
4851     test_cflags $warning_flag && add_cflags $1
4852 }
4853
4854 check_disable_warning -Wno-parentheses
4855 check_disable_warning -Wno-switch
4856 check_disable_warning -Wno-format-zero-length
4857 check_disable_warning -Wno-pointer-sign
4858
4859 check_disable_warning_headers(){
4860     warning_flag=-W${1#-Wno-}
4861     test_cflags $warning_flag && add_cflags_headers $1
4862 }
4863
4864 check_disable_warning_headers -Wno-deprecated-declarations
4865 check_disable_warning_headers -Wno-unused-variable
4866
4867 check_objcflags -fobjc-arc && enable objc_arc
4868
4869 check_cc <<EOF && enable blocks_extension
4870 void (^block)(void);
4871 EOF
4872
4873 # add some linker flags
4874 check_ldflags -Wl,--warn-common
4875 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample