configure: Handle SDL version check through pkg-config
[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     lgplv3
1756     libx262
1757     libxcb_shape
1758     lpc
1759     lzf
1760     me_cmp
1761     mpeg_er
1762     mpegaudio
1763     mpegaudiodsp
1764     mpegaudioheader
1765     mpegvideo
1766     mpegvideoenc
1767     mss34dsp
1768     pixblockdsp
1769     qpeldsp
1770     qsv
1771     qsvdec
1772     qsvenc
1773     rangecoder
1774     riffdec
1775     riffenc
1776     rtpdec
1777     rtpenc_chain
1778     rv34dsp
1779     sinewin
1780     snappy
1781     srtp
1782     startcode
1783     texturedsp
1784     texturedspenc
1785     tpeldsp
1786     vaapi_encode
1787     vc1dsp
1788     videodsp
1789     vp3dsp
1790     vp56dsp
1791     vp8dsp
1792     wma_freqs
1793     wmv2dsp
1794 "
1795
1796 CMDLINE_SELECT="
1797     $ARCH_EXT_LIST
1798     $CONFIG_LIST
1799     $HAVE_LIST_CMDLINE
1800     $THREADS_LIST
1801     asm
1802     cross_compile
1803     debug
1804     extra_warnings
1805     logging
1806     lto
1807     optimizations
1808     rpath
1809 "
1810
1811 PATHS_LIST="
1812     bindir
1813     datadir
1814     docdir
1815     incdir
1816     libdir
1817     mandir
1818     prefix
1819     shlibdir
1820 "
1821
1822 CMDLINE_SET="
1823     $PATHS_LIST
1824     ar
1825     arch
1826     as
1827     cc
1828     objcc
1829     cpu
1830     cross_prefix
1831     custom_allocator
1832     dep_cc
1833     env
1834     extra_version
1835     host_cc
1836     host_cflags
1837     host_extralibs
1838     host_ld
1839     host_ldflags
1840     host_os
1841     ignore_tests
1842     ld
1843     logfile
1844     malloc_prefix
1845     nm
1846     optflags
1847     pkg_config
1848     pkg_config_flags
1849     random_seed
1850     samples
1851     sysinclude
1852     sysroot
1853     target_exec
1854     target_os
1855     target_path
1856     target_samples
1857     toolchain
1858 "
1859
1860 CMDLINE_APPEND="
1861     extra_cflags
1862     extra_objcflags
1863     host_cppflags
1864 "
1865
1866 # code dependency declarations
1867
1868 # architecture extensions
1869
1870 armv5te_deps="arm"
1871 armv6_deps="arm"
1872 armv6t2_deps="arm"
1873 armv8_deps="aarch64"
1874 neon_deps_any="aarch64 arm"
1875 intrinsics_neon_deps="neon"
1876 vfp_deps_any="aarch64 arm"
1877 vfpv3_deps="vfp"
1878
1879 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1880
1881 altivec_deps="ppc"
1882 ppc4xx_deps="ppc"
1883 vsx_deps="altivec"
1884 power8_deps="vsx"
1885
1886 cpunop_deps="i686"
1887 x86_64_select="i686"
1888 x86_64_suggest="fast_cmov"
1889
1890 amd3dnow_deps="mmx"
1891 amd3dnowext_deps="amd3dnow"
1892 i686_deps="x86"
1893 mmx_deps="x86"
1894 mmxext_deps="mmx"
1895 sse_deps="mmxext"
1896 sse2_deps="sse"
1897 sse3_deps="sse2"
1898 ssse3_deps="sse3"
1899 sse4_deps="ssse3"
1900 sse42_deps="sse4"
1901 avx_deps="sse42"
1902 xop_deps="avx"
1903 fma3_deps="avx"
1904 fma4_deps="avx"
1905 avx2_deps="avx"
1906
1907 mmx_external_deps="yasm"
1908 mmx_inline_deps="inline_asm"
1909 mmx_suggest="mmx_external mmx_inline"
1910
1911 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1912     eval dep=\$${ext}_deps
1913     eval ${ext}_external_deps='"${dep}_external"'
1914     eval ${ext}_inline_deps='"${dep}_inline"'
1915     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1916 done
1917
1918 aligned_stack_if_any="aarch64 ppc x86"
1919 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1920 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1921 fast_unaligned_if_any="aarch64 ppc x86"
1922 simd_align_16_if_any="altivec neon sse"
1923 simd_align_32_if_any="avx"
1924
1925 # system capabilities
1926 symver_if_any="symver_asm_label symver_gnu_asm"
1927 valgrind_backtrace_conflict="optimizations"
1928 valgrind_backtrace_deps="valgrind_valgrind_h"
1929
1930 # threading support
1931 atomics_gcc_if="sync_val_compare_and_swap"
1932 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1933 atomics_win32_if="MemoryBarrier"
1934 atomics_native_if_any="$ATOMICS_LIST"
1935 w32threads_deps="atomics_native"
1936 threads_if_any="$THREADS_LIST"
1937
1938 # subsystems
1939 dct_select="rdft"
1940 dirac_parse_select="golomb"
1941 error_resilience_select="me_cmp"
1942 faandct_deps="faan fdctdsp"
1943 faanidct_deps="faan idctdsp"
1944 h264dsp_select="startcode"
1945 hevc_ps_select="golomb"
1946 intrax8_select="blockdsp idctdsp"
1947 mdct_select="fft"
1948 rdft_select="fft"
1949 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1950 mpeg_er_select="error_resilience"
1951 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1952 mpegaudiodsp_select="dct"
1953 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1954 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1955 vc1dsp_select="h264chroma qpeldsp startcode"
1956
1957 # decoders / encoders
1958 aac_decoder_select="imdct15 mdct sinewin"
1959 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1960 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1961 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1962 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1963 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1964 adpcm_g722_decoder_select="g722dsp"
1965 adpcm_g722_encoder_select="g722dsp"
1966 aic_decoder_select="golomb idctdsp"
1967 alac_encoder_select="lpc"
1968 als_decoder_select="bswapdsp"
1969 amrnb_decoder_select="lsp"
1970 amrwb_decoder_select="lsp"
1971 amv_decoder_select="sp5x_decoder"
1972 ape_decoder_select="bswapdsp"
1973 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1974 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1975 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1976 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1977 atrac1_decoder_select="mdct sinewin"
1978 atrac3_decoder_select="mdct"
1979 atrac3p_decoder_select="mdct sinewin"
1980 bink_decoder_select="blockdsp hpeldsp"
1981 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1982 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1983 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1984 cllc_decoder_select="bswapdsp"
1985 comfortnoise_encoder_select="lpc"
1986 cook_decoder_select="audiodsp mdct sinewin"
1987 cscd_decoder_select="lzo"
1988 cscd_decoder_suggest="zlib"
1989 dca_decoder_select="fmtconvert mdct"
1990 dds_decoder_select="texturedsp"
1991 dnxhd_decoder_select="blockdsp idctdsp"
1992 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1993 dvvideo_decoder_select="dvprofile idctdsp"
1994 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1995 dxa_decoder_deps="zlib"
1996 dxv_decoder_select="lzf texturedsp"
1997 eac3_decoder_select="ac3_decoder"
1998 eac3_encoder_select="ac3_encoder"
1999 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2000 eatgq_decoder_select="aandcttables idctdsp"
2001 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2002 exr_decoder_deps="zlib"
2003 ffv1_decoder_select="rangecoder"
2004 ffv1_encoder_select="rangecoder"
2005 ffvhuff_decoder_select="huffyuv_decoder"
2006 ffvhuff_encoder_select="huffyuv_encoder"
2007 fic_decoder_select="golomb"
2008 flac_decoder_select="flacdsp"
2009 flac_encoder_select="bswapdsp flacdsp lpc"
2010 flashsv_decoder_deps="zlib"
2011 flashsv_encoder_deps="zlib"
2012 flashsv2_decoder_deps="zlib"
2013 flv_decoder_select="h263_decoder"
2014 flv_encoder_select="h263_encoder"
2015 fourxm_decoder_select="blockdsp bswapdsp"
2016 fraps_decoder_select="bswapdsp huffman"
2017 g2m_decoder_deps="zlib"
2018 g2m_decoder_select="blockdsp idctdsp jpegtables"
2019 h261_decoder_select="mpeg_er mpegvideo"
2020 h261_encoder_select="aandcttables mpegvideoenc"
2021 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2022 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2023 h263i_decoder_select="h263_decoder"
2024 h263p_encoder_select="h263_encoder"
2025 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2026 h264_decoder_suggest="error_resilience"
2027 hap_decoder_select="snappy texturedsp"
2028 hap_encoder_deps="libsnappy"
2029 hap_encoder_select="texturedspenc"
2030 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2031 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2032 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2033 iac_decoder_select="imc_decoder"
2034 imc_decoder_select="bswapdsp fft mdct sinewin"
2035 indeo3_decoder_select="hpeldsp"
2036 indeo4_decoder_select="ividsp"
2037 indeo5_decoder_select="ividsp"
2038 interplay_video_decoder_select="hpeldsp"
2039 jpegls_decoder_select="mjpeg_decoder"
2040 jv_decoder_select="blockdsp"
2041 lagarith_decoder_select="huffyuvdsp"
2042 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2043 magicyuv_decoder_select="huffyuvdsp"
2044 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2045 metasound_decoder_select="lsp mdct sinewin"
2046 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2047 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2048 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2049 mjpegb_decoder_select="mjpeg_decoder"
2050 mlp_decoder_select="mlp_parser"
2051 motionpixels_decoder_select="bswapdsp"
2052 mp1_decoder_select="mpegaudio"
2053 mp1float_decoder_select="mpegaudio"
2054 mp2_decoder_select="mpegaudio"
2055 mp2float_decoder_select="mpegaudio"
2056 mp3_decoder_select="mpegaudio"
2057 mp3adu_decoder_select="mpegaudio"
2058 mp3adufloat_decoder_select="mpegaudio"
2059 mp3float_decoder_select="mpegaudio"
2060 mp3on4_decoder_select="mpegaudio"
2061 mp3on4float_decoder_select="mpegaudio"
2062 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2063 mpc8_decoder_select="mpegaudiodsp"
2064 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2065 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2066 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2067 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2068 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2069 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2070 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2071 mpeg4_encoder_select="h263_encoder"
2072 msa1_decoder_select="mss34dsp"
2073 msmpeg4v1_decoder_select="h263_decoder"
2074 msmpeg4v2_decoder_select="h263_decoder"
2075 msmpeg4v2_encoder_select="h263_encoder"
2076 msmpeg4v3_decoder_select="h263_decoder"
2077 msmpeg4v3_encoder_select="h263_encoder"
2078 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2079 mts2_decoder_select="mss34dsp"
2080 mxpeg_decoder_select="mjpeg_decoder"
2081 nellymoser_decoder_select="mdct sinewin"
2082 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2083 nuv_decoder_select="idctdsp lzo"
2084 on2avc_decoder_select="mdct"
2085 opus_decoder_deps="avresample"
2086 opus_decoder_select="imdct15"
2087 png_decoder_deps="zlib"
2088 png_encoder_deps="zlib"
2089 png_encoder_select="huffyuvencdsp"
2090 prores_decoder_select="idctdsp"
2091 prores_encoder_select="fdctdsp"
2092 qcelp_decoder_select="lsp"
2093 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2094 ra_144_encoder_select="audio_frame_queue lpc"
2095 ralf_decoder_select="golomb"
2096 rscc_decoder_deps="zlib"
2097 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2098 rv10_encoder_select="h263_encoder"
2099 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2100 rv20_encoder_select="h263_encoder"
2101 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2102 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2103 screenpresso_decoder_deps="zlib"
2104 sipr_decoder_select="lsp"
2105 sp5x_decoder_select="mjpeg_decoder"
2106 svq1_decoder_select="hpeldsp"
2107 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2108 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2109 svq3_decoder_suggest="zlib"
2110 tak_decoder_select="audiodsp"
2111 tdsc_decoder_deps="zlib"
2112 tdsc_decoder_select="mjpeg_decoder"
2113 theora_decoder_select="vp3_decoder"
2114 thp_decoder_select="mjpeg_decoder"
2115 tiff_decoder_suggest="zlib"
2116 tiff_encoder_suggest="zlib"
2117 truehd_decoder_select="mlp_decoder"
2118 truemotion2_decoder_select="bswapdsp"
2119 truespeech_decoder_select="bswapdsp"
2120 tscc_decoder_deps="zlib"
2121 txd_decoder_select="texturedsp"
2122 twinvq_decoder_select="mdct lsp sinewin"
2123 utvideo_decoder_select="bswapdsp"
2124 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2125 vble_decoder_select="huffyuvdsp"
2126 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2127 vc1image_decoder_select="vc1_decoder"
2128 vorbis_decoder_select="mdct"
2129 vorbis_encoder_select="mdct"
2130 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2131 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2132 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2133 vp6a_decoder_select="vp6_decoder"
2134 vp6f_decoder_select="vp6_decoder"
2135 vp7_decoder_select="h264pred videodsp vp8dsp"
2136 vp8_decoder_select="h264pred videodsp vp8dsp"
2137 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2138 webp_decoder_select="vp8_decoder"
2139 wmapro_decoder_select="mdct sinewin wma_freqs"
2140 wmav1_decoder_select="mdct sinewin wma_freqs"
2141 wmav1_encoder_select="mdct sinewin wma_freqs"
2142 wmav2_decoder_select="mdct sinewin wma_freqs"
2143 wmav2_encoder_select="mdct sinewin wma_freqs"
2144 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2145 wmv1_decoder_select="h263_decoder"
2146 wmv1_encoder_select="h263_encoder"
2147 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2148 wmv2_encoder_select="h263_encoder wmv2dsp"
2149 wmv3_decoder_select="vc1_decoder"
2150 wmv3image_decoder_select="wmv3_decoder"
2151 zerocodec_decoder_deps="zlib"
2152 zlib_decoder_deps="zlib"
2153 zlib_encoder_deps="zlib"
2154 zmbv_decoder_deps="zlib"
2155 zmbv_encoder_deps="zlib"
2156
2157 # hardware accelerators
2158 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2159 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2160 dxva2_lib_deps="dxva2"
2161 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2162 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2163
2164 h263_vaapi_hwaccel_deps="vaapi"
2165 h263_vaapi_hwaccel_select="h263_decoder"
2166 h264_d3d11va_hwaccel_deps="d3d11va"
2167 h264_d3d11va_hwaccel_select="h264_decoder"
2168 h264_dxva2_hwaccel_deps="dxva2"
2169 h264_dxva2_hwaccel_select="h264_decoder"
2170 h264_mmal_hwaccel_deps="mmal"
2171 h264_qsv_hwaccel_deps="libmfx"
2172 h264_vaapi_hwaccel_deps="vaapi"
2173 h264_vaapi_hwaccel_select="h264_decoder"
2174 h264_vda_hwaccel_deps="vda"
2175 h264_vda_hwaccel_select="h264_decoder"
2176 h264_vda_old_hwaccel_deps="vda"
2177 h264_vda_old_hwaccel_select="h264_decoder"
2178 h264_vdpau_hwaccel_deps="vdpau"
2179 h264_vdpau_hwaccel_select="h264_decoder"
2180 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2181 hevc_d3d11va_hwaccel_select="hevc_decoder"
2182 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2183 hevc_dxva2_hwaccel_select="hevc_decoder"
2184 hevc_qsv_hwaccel_deps="libmfx"
2185 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2186 hevc_vaapi_hwaccel_select="hevc_decoder"
2187 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2188 hevc_vdpau_hwaccel_select="hevc_decoder"
2189 mpeg1_vdpau_hwaccel_deps="vdpau"
2190 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2191 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2192 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2193 mpeg2_dxva2_hwaccel_deps="dxva2"
2194 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2195 mpeg2_mmal_hwaccel_deps="mmal"
2196 mpeg2_qsv_hwaccel_deps="libmfx"
2197 mpeg2_vaapi_hwaccel_deps="vaapi"
2198 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2199 mpeg2_vdpau_hwaccel_deps="vdpau"
2200 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2201 mpeg4_vaapi_hwaccel_deps="vaapi"
2202 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2203 mpeg4_vdpau_hwaccel_deps="vdpau"
2204 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2205 vc1_d3d11va_hwaccel_deps="d3d11va"
2206 vc1_d3d11va_hwaccel_select="vc1_decoder"
2207 vc1_dxva2_hwaccel_deps="dxva2"
2208 vc1_dxva2_hwaccel_select="vc1_decoder"
2209 vc1_mmal_hwaccel_deps="mmal"
2210 vc1_qsv_hwaccel_deps="libmfx"
2211 vc1_vaapi_hwaccel_deps="vaapi"
2212 vc1_vaapi_hwaccel_select="vc1_decoder"
2213 vc1_vdpau_hwaccel_deps="vdpau"
2214 vc1_vdpau_hwaccel_select="vc1_decoder"
2215 vp8_qsv_hwaccel_deps="libmfx"
2216 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2217 vp8_vaapi_hwaccel_select="vp8_decoder"
2218 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2219 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2220 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2221 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2222
2223 # hardware-accelerated codecs
2224 nvenc_deps_any="dlopen LoadLibrary"
2225 nvenc_extralibs='$ldl'
2226 omx_deps="dlopen pthreads"
2227 omx_extralibs='$ldl'
2228 omx_rpi_select="omx"
2229 qsvdec_select="qsv"
2230 qsvenc_select="qsv"
2231 vaapi_encode_deps="vaapi"
2232
2233 hwupload_cuda_filter_deps="cuda"
2234 scale_npp_filter_deps="cuda libnpp"
2235
2236 h264_mmal_decoder_deps="mmal"
2237 h264_nvenc_encoder_deps="nvenc"
2238 h264_omx_encoder_deps="omx"
2239 h264_qsv_decoder_deps="libmfx"
2240 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2241 h264_qsv_encoder_deps="libmfx"
2242 h264_qsv_encoder_select="qsvenc"
2243 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2244 h264_vaapi_encoder_select="vaapi_encode golomb"
2245 hevc_nvenc_encoder_deps="nvenc"
2246 hevc_qsv_decoder_deps="libmfx"
2247 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2248 hevc_qsv_encoder_deps="libmfx"
2249 hevc_qsv_encoder_select="hevc_ps qsvenc"
2250 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2251 hevc_vaapi_encoder_select="vaapi_encode golomb"
2252 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2253 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2254 mpeg2_mmal_decoder_deps="mmal"
2255 mpeg2_qsv_decoder_deps="libmfx"
2256 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2257 mpeg2_qsv_encoder_deps="libmfx"
2258 mpeg2_qsv_encoder_select="qsvenc"
2259 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2260 mpeg2_vaapi_encoder_select="vaapi_encode"
2261 mpeg4_omx_encoder_deps="omx"
2262 vc1_mmal_decoder_deps="mmal"
2263 vc1_qsv_decoder_deps="libmfx"
2264 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2265 vp8_qsv_decoder_deps="libmfx"
2266 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2267 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2268 vp8_vaapi_encoder_select="vaapi_encode"
2269
2270 nvenc_h264_encoder_select="h264_nvenc_encoder"
2271 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2272
2273 # parsers
2274 h264_parser_select="golomb h264dsp h264parse"
2275 hevc_parser_select="hevc_ps"
2276 mpegaudio_parser_select="mpegaudioheader"
2277 mpegvideo_parser_select="mpegvideo"
2278 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2279 vc1_parser_select="vc1dsp"
2280
2281 # bitstream_filters
2282 mjpeg2jpeg_bsf_select="jpegtables"
2283
2284 # external libraries
2285 avisynth_deps="LoadLibrary"
2286 avxsynth_deps="dlopen"
2287 avisynth_demuxer_deps_any="avisynth avxsynth"
2288 avisynth_demuxer_select="riffdec"
2289 libdcadec_decoder_deps="libdcadec"
2290 libfaac_encoder_deps="libfaac"
2291 libfaac_encoder_select="audio_frame_queue"
2292 libfdk_aac_decoder_deps="libfdk_aac"
2293 libfdk_aac_encoder_deps="libfdk_aac"
2294 libfdk_aac_encoder_select="audio_frame_queue"
2295 libgsm_decoder_deps="libgsm"
2296 libgsm_encoder_deps="libgsm"
2297 libgsm_ms_decoder_deps="libgsm"
2298 libgsm_ms_encoder_deps="libgsm"
2299 libilbc_decoder_deps="libilbc"
2300 libilbc_encoder_deps="libilbc"
2301 libkvazaar_encoder_deps="libkvazaar"
2302 libmp3lame_encoder_deps="libmp3lame"
2303 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2304 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2305 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2306 libopencore_amrnb_encoder_select="audio_frame_queue"
2307 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2308 libopenh264_decoder_deps="libopenh264"
2309 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2310 libopenh264_encoder_deps="libopenh264"
2311 libopenjpeg_decoder_deps="libopenjpeg"
2312 libopenjpeg_encoder_deps="libopenjpeg"
2313 libopus_decoder_deps="libopus"
2314 libopus_encoder_deps="libopus"
2315 libopus_encoder_select="audio_frame_queue"
2316 libschroedinger_decoder_deps="libschroedinger"
2317 libschroedinger_encoder_deps="libschroedinger"
2318 libspeex_decoder_deps="libspeex"
2319 libspeex_encoder_deps="libspeex"
2320 libspeex_encoder_select="audio_frame_queue"
2321 libtheora_encoder_deps="libtheora"
2322 libtwolame_encoder_deps="libtwolame"
2323 libvo_aacenc_encoder_deps="libvo_aacenc"
2324 libvo_aacenc_encoder_select="audio_frame_queue"
2325 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2326 libvorbis_encoder_deps="libvorbis"
2327 libvorbis_encoder_select="audio_frame_queue"
2328 libvpx_vp8_decoder_deps="libvpx"
2329 libvpx_vp8_encoder_deps="libvpx"
2330 libvpx_vp9_decoder_deps="libvpx"
2331 libvpx_vp9_encoder_deps="libvpx"
2332 libwavpack_encoder_deps="libwavpack"
2333 libwavpack_encoder_select="audio_frame_queue"
2334 libwebp_encoder_deps="libwebp"
2335 libx262_encoder_deps="libx262"
2336 libx264_encoder_deps="libx264"
2337 libx265_encoder_deps="libx265"
2338 libxavs_encoder_deps="libxavs"
2339 libxvid_encoder_deps="libxvid mkstemp"
2340
2341 # demuxers / muxers
2342 ac3_demuxer_select="ac3_parser"
2343 asf_demuxer_select="riffdec"
2344 asf_muxer_select="riffenc"
2345 asf_stream_muxer_select="asf_muxer"
2346 avi_demuxer_select="iso_media riffdec"
2347 avi_muxer_select="riffenc"
2348 caf_demuxer_select="iso_media riffdec"
2349 dash_muxer_select="mp4_muxer"
2350 dirac_demuxer_select="dirac_parser"
2351 dv_demuxer_select="dvprofile"
2352 dv_muxer_select="dvprofile"
2353 dxa_demuxer_select="riffdec"
2354 eac3_demuxer_select="ac3_parser"
2355 f4v_muxer_select="mov_muxer"
2356 flac_demuxer_select="flac_parser"
2357 hds_muxer_select="flv_muxer"
2358 hls_muxer_select="mpegts_muxer"
2359 ipod_muxer_select="mov_muxer"
2360 ismv_muxer_select="mov_muxer"
2361 matroska_audio_muxer_select="matroska_muxer"
2362 matroska_demuxer_select="iso_media riffdec"
2363 matroska_demuxer_suggest="bzlib lzo zlib"
2364 matroska_muxer_select="iso_media riffenc"
2365 mmf_muxer_select="riffenc"
2366 mov_demuxer_select="iso_media riffdec"
2367 mov_demuxer_suggest="zlib"
2368 mov_muxer_select="iso_media riffenc rtpenc_chain"
2369 mp3_demuxer_select="mpegaudio_parser"
2370 mp3_muxer_select="mpegaudioheader"
2371 mp4_muxer_select="mov_muxer"
2372 mpegts_demuxer_select="iso_media"
2373 mpegts_muxer_select="adts_muxer latm_muxer"
2374 mpegtsraw_demuxer_select="mpegts_demuxer"
2375 mxf_d10_muxer_select="mxf_muxer"
2376 nut_muxer_select="riffenc"
2377 nuv_demuxer_select="riffdec"
2378 oga_muxer_select="ogg_muxer"
2379 ogg_demuxer_select="dirac_parse"
2380 opus_muxer_select="ogg_muxer"
2381 psp_muxer_select="mov_muxer"
2382 rtp_demuxer_select="sdp_demuxer"
2383 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2384 rtsp_demuxer_select="http_protocol rtpdec"
2385 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2386 sap_demuxer_select="sdp_demuxer"
2387 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2388 sdp_demuxer_select="rtpdec"
2389 smoothstreaming_muxer_select="ismv_muxer"
2390 spdif_muxer_select="aac_parser"
2391 spx_muxer_select="ogg_muxer"
2392 swf_demuxer_suggest="zlib"
2393 tak_demuxer_select="tak_parser"
2394 tg2_muxer_select="mov_muxer"
2395 tgp_muxer_select="mov_muxer"
2396 w64_demuxer_select="wav_demuxer"
2397 wav_demuxer_select="riffdec"
2398 wav_muxer_select="riffenc"
2399 webm_muxer_select="iso_media riffenc"
2400 wtv_demuxer_select="mpegts_demuxer riffdec"
2401 xmv_demuxer_select="riffdec"
2402 xwma_demuxer_select="riffdec"
2403
2404 # indevs / outdevs
2405 alsa_indev_deps="alsa"
2406 alsa_outdev_deps="alsa"
2407 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2408 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2409 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2410 dv1394_indev_deps="dv1394"
2411 dv1394_indev_select="dv_demuxer"
2412 fbdev_indev_deps="linux_fb_h"
2413 jack_indev_deps="jack"
2414 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2415 libcdio_indev_deps="libcdio"
2416 libdc1394_indev_deps="libdc1394"
2417 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2418 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2419 pulse_indev_deps="libpulse"
2420 sndio_indev_deps="sndio"
2421 sndio_outdev_deps="sndio"
2422 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2423 vfwcap_indev_deps="vfw32 vfwcap_defines"
2424 xcbgrab_indev_deps="libxcb libxcb_shape"
2425 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2426
2427 # protocols
2428 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2429 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2430 ffrtmpcrypt_protocol_select="tcp_protocol"
2431 ffrtmphttp_protocol_conflict="librtmp_protocol"
2432 ffrtmphttp_protocol_select="http_protocol"
2433 gopher_protocol_select="network"
2434 http_protocol_select="tcp_protocol"
2435 httpproxy_protocol_select="tcp_protocol"
2436 https_protocol_select="tls_protocol"
2437 icecast_protocol_select="http_protocol"
2438 librtmp_protocol_deps="librtmp"
2439 librtmpe_protocol_deps="librtmp"
2440 librtmps_protocol_deps="librtmp"
2441 librtmpt_protocol_deps="librtmp"
2442 librtmpte_protocol_deps="librtmp"
2443 mmsh_protocol_select="http_protocol"
2444 mmst_protocol_select="network"
2445 rtmp_protocol_conflict="librtmp_protocol"
2446 rtmp_protocol_select="tcp_protocol"
2447 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2448 rtmps_protocol_conflict="librtmp_protocol"
2449 rtmps_protocol_select="tls_protocol"
2450 rtmpt_protocol_select="ffrtmphttp_protocol"
2451 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2452 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2453 rtp_protocol_select="udp_protocol"
2454 sctp_protocol_deps="struct_sctp_event_subscribe"
2455 sctp_protocol_select="network"
2456 srtp_protocol_select="rtp_protocol srtp"
2457 tcp_protocol_select="network"
2458 tls_gnutls_protocol_deps="gnutls"
2459 tls_gnutls_protocol_select="tcp_protocol"
2460 tls_openssl_protocol_conflict="tls_gnutls_protocol"
2461 tls_openssl_protocol_deps="openssl"
2462 tls_openssl_protocol_select="tcp_protocol"
2463 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2464 udp_protocol_select="network"
2465 unix_protocol_deps="sys_un_h"
2466 unix_protocol_select="network"
2467
2468 # filters
2469 asyncts_filter_deps="avresample"
2470 blackframe_filter_deps="gpl"
2471 boxblur_filter_deps="gpl"
2472 bs2b_filter_deps="libbs2b"
2473 cropdetect_filter_deps="gpl"
2474 deinterlace_qsv_filter_deps="libmfx"
2475 deinterlace_vaapi_filter_deps="vaapi"
2476 delogo_filter_deps="gpl"
2477 drawtext_filter_deps="libfreetype"
2478 drawtext_filter_suggest="libfontconfig"
2479 frei0r_filter_deps="frei0r dlopen"
2480 frei0r_filter_extralibs='$ldl'
2481 frei0r_src_filter_deps="frei0r dlopen"
2482 frei0r_src_filter_extralibs='$ldl'
2483 hdcd_filter_deps="libhdcd"
2484 hqdn3d_filter_deps="gpl"
2485 interlace_filter_deps="gpl"
2486 movie_filter_deps="avcodec avformat"
2487 ocv_filter_deps="libopencv"
2488 resample_filter_deps="avresample"
2489 scale_filter_deps="swscale"
2490 scale_qsv_filter_deps="libmfx"
2491 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2492
2493 # examples
2494 decode_audio_example_deps="avcodec avutil"
2495 decode_video_example_deps="avcodec avutil"
2496 encode_audio_example_deps="avcodec avutil"
2497 encode_video_example_deps="avcodec avutil"
2498 filter_audio_example_deps="avfilter avutil"
2499 metadata_example_deps="avformat avutil"
2500 output_example_deps="avcodec avformat avresample avutil swscale"
2501 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2502 transcode_aac_example_deps="avcodec avformat avresample"
2503
2504 # libraries, in linking order
2505 avcodec_deps="avutil"
2506 avcodec_select="null_bsf"
2507 avdevice_deps="avformat avcodec avutil"
2508 avfilter_deps="avutil"
2509 avformat_deps="avcodec avutil"
2510 avformat_suggest="network"
2511 avresample_deps="avutil"
2512 swscale_deps="avutil"
2513
2514 # programs
2515 avconv_deps="avcodec avfilter avformat avresample swscale"
2516 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2517                fps_filter null_filter resample_filter scale_filter
2518                trim_filter"
2519 avplay_deps="avcodec avfilter avformat avresample sdl"
2520 avplay_extralibs='$sdl_extralibs'
2521 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2522 avprobe_deps="avcodec avformat"
2523
2524 # documentation
2525 pod2man_deps="doc"
2526 texi2html_deps="doc"
2527
2528 # default parameters
2529
2530 logfile="avbuild/config.log"
2531
2532 # installation paths
2533 prefix_default="/usr/local"
2534 bindir_default='${prefix}/bin'
2535 datadir_default='${prefix}/share/avconv'
2536 docdir_default='${prefix}/share/doc/libav'
2537 incdir_default='${prefix}/include'
2538 libdir_default='${prefix}/lib'
2539 mandir_default='${prefix}/share/man'
2540 shlibdir_default="$libdir_default"
2541
2542 # toolchain
2543 ar_default="ar"
2544 cc_default="gcc"
2545 host_cc_default="gcc"
2546 ln_s="ln -s -f"
2547 nm_default="nm -g"
2548 objformat="elf"
2549 pkg_config_default=pkg-config
2550 ranlib="ranlib"
2551 strip="strip"
2552 version_script='--version-script'
2553 yasmexe="yasm"
2554
2555 # machine
2556 arch_default=$(uname -m)
2557 cpu="generic"
2558 intrinsics="none"
2559
2560 # OS
2561 target_os_default=$(tolower $(uname -s))
2562 host_os=$target_os_default
2563
2564 # configurable options
2565 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2566
2567 enable asm
2568 enable debug
2569 enable doc
2570 enable faan faandct faanidct
2571 enable optimizations
2572 enable safe_bitstream_reader
2573 enable static
2574 enable swscale_alpha
2575 enable valgrind_backtrace
2576
2577 # By default, enable only those hwaccels that have no external dependencies.
2578 enable d3d11va dxva2 vda vdpau
2579
2580 # build settings
2581 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2582 LIBPREF="lib"
2583 LIBSUF=".a"
2584 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2585 SLIBPREF="lib"
2586 SLIBSUF=".so"
2587 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2588 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2589 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2590 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2591 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2592 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2593 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2594
2595 asflags_filter=echo
2596 cflags_filter=echo
2597 ldflags_filter=echo
2598
2599 AS_C='-c'
2600 AS_O='-o $@'
2601 CC_C='-c'
2602 CC_E='-E -o $@'
2603 CC_O='-o $@'
2604 OBJCC_C='-c'
2605 OBJCC_E='-E -o $@'
2606 OBJCC_O='-o $@'
2607 LD_O='-o $@'
2608 LD_LIB='-l%'
2609 LD_PATH='-L'
2610 HOSTCC_C='-c'
2611 HOSTCC_E='-E -o $@'
2612 HOSTCC_O='-o $@'
2613 HOSTLD_O='-o $@'
2614
2615 host_extralibs='-lm'
2616 host_cflags_filter=echo
2617 host_ldflags_filter=echo
2618
2619 target_path='$(CURDIR)'
2620
2621 # since the object filename is not given with the -MM flag, the compiler
2622 # is only able to print the basename, and we must add the path ourselves
2623 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2624 DEPFLAGS='-MM'
2625
2626 mkdir -p avbuild
2627
2628 # find source path
2629 if test -f configure; then
2630     source_path=.
2631 else
2632     source_path=$(cd $(dirname "$0"); pwd)
2633     echo "$source_path" | grep -q '[[:blank:]]' &&
2634         die "Out of tree builds are impossible with whitespace in source path."
2635     test -e "$source_path/config.h" &&
2636         die "Out of tree builds are impossible with config.h in source dir."
2637 fi
2638
2639 for v in "$@"; do
2640     r=${v#*=}
2641     l=${v%"$r"}
2642     r=$(sh_quote "$r")
2643     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2644 done
2645
2646 find_things(){
2647     thing=$1
2648     pattern=$2
2649     file=$source_path/$3
2650     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2651 }
2652
2653 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2654 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2655 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2656 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2657 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2658 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2659 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2660 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2661 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2662
2663 find_things_extern(){
2664     thing=$1
2665     pattern=$2
2666     file=$source_path/$3
2667     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2668 }
2669
2670 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2671 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2672
2673 ALL_COMPONENTS="
2674     $BSF_LIST
2675     $DECODER_LIST
2676     $DEMUXER_LIST
2677     $ENCODER_LIST
2678     $FILTER_LIST
2679     $HWACCEL_LIST
2680     $INDEV_LIST
2681     $MUXER_LIST
2682     $OUTDEV_LIST
2683     $PARSER_LIST
2684     $PROTOCOL_LIST
2685 "
2686
2687 for n in $COMPONENT_LIST; do
2688     v=$(toupper ${n%s})_LIST
2689     eval enable \$$v
2690     eval ${n}_if_any="\$$v"
2691 done
2692
2693 enable $ARCH_EXT_LIST
2694
2695 die_unknown(){
2696     echo "Unknown option \"$1\"."
2697     echo "See $0 --help for available options."
2698     exit 1
2699 }
2700
2701 print_3_columns() {
2702     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2703 }
2704
2705 show_list() {
2706     suffix=_$1
2707     shift
2708     echo $* | sed s/$suffix//g | print_3_columns
2709     exit 0
2710 }
2711
2712 rand_list(){
2713     IFS=', '
2714     set -- $*
2715     unset IFS
2716     for thing; do
2717         comp=${thing%:*}
2718         prob=${thing#$comp}
2719         prob=${prob#:}
2720         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2721         echo "prob ${prob:-0.5}"
2722         printf '%s\n' $comp
2723     done
2724 }
2725
2726 do_random(){
2727     action=$1
2728     shift
2729     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2730     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2731 }
2732
2733 for opt do
2734     optval="${opt#*=}"
2735     case "$opt" in
2736         --extra-ldflags=*)
2737             add_ldflags $optval
2738         ;;
2739         --extra-ldexeflags=*)
2740             add_ldexeflags $optval
2741         ;;
2742         --extra-libs=*)
2743             add_extralibs $optval
2744         ;;
2745         --disable-devices)
2746             disable $INDEV_LIST $OUTDEV_LIST
2747         ;;
2748         --enable-debug=*)
2749             debuglevel="$optval"
2750         ;;
2751         --disable-programs)
2752             disable $PROGRAM_LIST
2753         ;;
2754         --disable-everything)
2755             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2756         ;;
2757         --disable-all)
2758             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2759             disable $LIBRARY_LIST $PROGRAM_LIST doc
2760         ;;
2761         --enable-random|--disable-random)
2762             action=${opt%%-random}
2763             do_random ${action#--} $COMPONENT_LIST
2764         ;;
2765         --enable-random=*|--disable-random=*)
2766             action=${opt%%-random=*}
2767             do_random ${action#--} $optval
2768         ;;
2769         --enable-*=*|--disable-*=*)
2770             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2771             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2772             eval list=\$$(toupper $thing)_LIST
2773             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2774             $action $(filter "$name" $list)
2775         ;;
2776         --enable-avserver|--disable-avserver*)
2777             warn "avserver has been removed, the ${opt} option is only"\
2778                  "provided for compatibility and will be removed in the future"
2779         ;;
2780         --enable-?*|--disable-?*)
2781             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2782             if is_in $option $COMPONENT_LIST; then
2783                 test $action = disable && action=unset
2784                 eval $action \$$(toupper ${option%s})_LIST
2785             elif is_in $option $CMDLINE_SELECT; then
2786                 $action $option
2787             else
2788                 die_unknown $opt
2789             fi
2790         ;;
2791         --list-*)
2792             NAME="${opt#--list-}"
2793             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2794             NAME=${NAME%s}
2795             eval show_list $NAME \$$(toupper $NAME)_LIST
2796         ;;
2797         --help|-h) show_help
2798         ;;
2799         --quiet|-q) quiet=yes
2800         ;;
2801         *)
2802             optname="${opt%%=*}"
2803             optname="${optname#--}"
2804             optname=$(echo "$optname" | sed 's/-/_/g')
2805             if is_in $optname $CMDLINE_SET; then
2806                 eval $optname='$optval'
2807             elif is_in $optname $CMDLINE_APPEND; then
2808                 append $optname "$optval"
2809             else
2810                 die_unknown $opt
2811             fi
2812         ;;
2813     esac
2814 done
2815
2816 for e in $env; do
2817     eval "export $e"
2818 done
2819
2820 disabled logging && logfile=/dev/null
2821
2822 # Die early if licensing-related configure options are incompatible.
2823 die_license_disabled() {
2824     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2825 }
2826
2827 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2828 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2829 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2830
2831 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2832
2833 # Disable all the library-specific components if the library itself
2834 # is disabled, see AVCODEC_LIST and following _LIST variables.
2835
2836 disable_components(){
2837     disabled ${1} && disable $(
2838         eval components="\$$(toupper ${1})_COMPONENTS"
2839         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2840     )
2841 }
2842
2843 map 'disable_components $v' $LIBRARY_LIST
2844
2845 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2846 set >> $logfile
2847
2848 case "$toolchain" in
2849     *-asan)
2850         cc_default="${toolchain%-asan}"
2851         add_cflags  -fsanitize=address
2852         add_ldflags -fsanitize=address
2853     ;;
2854     *-msan)
2855         cc_default="${toolchain%-msan}"
2856         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2857         add_ldflags -fsanitize=memory
2858     ;;
2859     *-tsan)
2860         cc_default="${toolchain%-tsan}"
2861         add_cflags  -fsanitize=thread -fPIE
2862         add_ldflags -fsanitize=thread -pie
2863         case "$toolchain" in
2864             gcc-tsan)
2865                 add_cflags  -fPIC
2866                 add_ldflags -fPIC
2867                 ;;
2868         esac
2869     ;;
2870     *-usan)
2871         cc_default="${toolchain%-usan}"
2872         add_cflags  -fsanitize=undefined
2873         add_ldflags -fsanitize=undefined
2874         case "$toolchain" in
2875             clang-usan)
2876                 add_cflags -O1
2877                 ;;
2878         esac
2879     ;;
2880     valgrind-*)
2881         target_exec_default="valgrind"
2882         case "$toolchain" in
2883             valgrind-massif)
2884                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2885                 ;;
2886             valgrind-memcheck)
2887                 target_exec_args="--track-origins=yes --leak-check=full"
2888                 ;;
2889         esac
2890     ;;
2891     msvc)
2892         # Check whether the current MSVC version needs the C99 converter.
2893         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2894         # support enough of C99 to build libav. Default to the new
2895         # behaviour if the regexp was unable to match anything, since this
2896         # successfully parses the version number of existing supported
2897         # versions that require the converter (MSVC 2010 and 2012).
2898         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2899         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2900             cc_default="cl"
2901         else
2902             cc_default="c99wrap cl"
2903         fi
2904         ld_default="$source_path/compat/windows/mslink"
2905         nm_default="dumpbin -symbols"
2906         ar_default="lib"
2907         case "$arch" in
2908         arm*)
2909             as_default="armasm"
2910             ;;
2911         esac
2912         target_os_default="win32"
2913         # Use a relative path for TMPDIR. This makes sure all the
2914         # ffconf temp files are written with a relative path, avoiding
2915         # issues with msys/win32 path conversion for MSVC parameters
2916         # such as -Fo<file> or -out:<file>.
2917         TMPDIR=.
2918     ;;
2919     icl)
2920         cc_default="icl"
2921         ld_default="xilink"
2922         nm_default="dumpbin -symbols"
2923         ar_default="xilib"
2924         target_os_default="win32"
2925         TMPDIR=.
2926     ;;
2927     gcov)
2928         add_cflags  -fprofile-arcs -ftest-coverage
2929         add_ldflags -fprofile-arcs -ftest-coverage
2930     ;;
2931     llvm-cov)
2932         add_cflags -fprofile-arcs -ftest-coverage
2933         add_ldflags --coverage
2934     ;;
2935     hardened)
2936         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2937         add_cflags   -fno-strict-overflow -fstack-protector-all
2938         add_ldflags  -Wl,-z,relro -Wl,-z,now
2939     ;;
2940     ?*)
2941         die "Unknown toolchain $toolchain"
2942     ;;
2943 esac
2944
2945 test -n "$cross_prefix" && enable cross_compile
2946
2947 if enabled cross_compile; then
2948     test -n "$arch" && test -n "$target_os" ||
2949         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2950 fi
2951
2952 ar_default="${cross_prefix}${ar_default}"
2953 cc_default="${cross_prefix}${cc_default}"
2954 occ_default="${cross_prefix}${occ_default}"
2955 nm_default="${cross_prefix}${nm_default}"
2956 pkg_config_default="${cross_prefix}${pkg_config_default}"
2957 ranlib="${cross_prefix}${ranlib}"
2958 strip="${cross_prefix}${strip}"
2959
2960 sysinclude_default="${sysroot}/usr/include"
2961
2962 set_default arch cc pkg_config sysinclude target_exec target_os
2963 enabled cross_compile || host_cc_default=$cc
2964 set_default host_cc
2965
2966 if ! $pkg_config --version >/dev/null 2>&1; then
2967     warn "$pkg_config not found, library detection may fail."
2968     pkg_config=false
2969 fi
2970
2971 exesuf() {
2972     case $1 in
2973         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2974     esac
2975 }
2976
2977 EXESUF=$(exesuf $target_os)
2978 HOSTEXESUF=$(exesuf $host_os)
2979
2980 # set temporary file name
2981 : ${TMPDIR:=$TEMPDIR}
2982 : ${TMPDIR:=$TMP}
2983 : ${TMPDIR:=/tmp}
2984
2985 if ! check_cmd mktemp -u XXXXXX; then
2986     # simple replacement for missing mktemp
2987     # NOT SAFE FOR GENERAL USE
2988     mktemp(){
2989         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2990         echo "$tmpname"
2991         mkdir "$tmpname"
2992     }
2993 fi
2994
2995 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
2996     die "Unable to create temporary directory in $TMPDIR."
2997
2998 tmpfile(){
2999     tmp="${AVTMPDIR}/test"$2
3000     (set -C; exec > $tmp) 2> /dev/null ||
3001         die "Unable to create temporary file in $AVTMPDIR."
3002     eval $1=$tmp
3003 }
3004
3005 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3006 trap 'exit 2' INT
3007
3008 tmpfile TMPASM .asm
3009 tmpfile TMPC   .c
3010 tmpfile TMPE   $EXESUF
3011 tmpfile TMPH   .h
3012 tmpfile TMPO   .o
3013 tmpfile TMPS   .S
3014 tmpfile TMPSH  .sh
3015 tmpfile TMPV   .ver
3016
3017 unset -f mktemp
3018
3019 chmod +x $TMPE
3020
3021 # make sure we can execute files in $TMPDIR
3022 cat > $TMPSH 2>> $logfile <<EOF
3023 #! /bin/sh
3024 EOF
3025 chmod +x $TMPSH >> $logfile 2>&1
3026 if ! $TMPSH >> $logfile 2>&1; then
3027     cat <<EOF
3028 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3029 variable to another directory and make sure that it is not mounted noexec.
3030 EOF
3031     die "Sanity test failed."
3032 fi
3033
3034 armasm_flags(){
3035     for flag; do
3036         case $flag in
3037             # Filter out MSVC cl.exe options from cflags that shouldn't
3038             # be passed to gas-preprocessor
3039             -M[TD]*)                                            ;;
3040             *)                  echo $flag                      ;;
3041         esac
3042    done
3043 }
3044
3045 ccc_flags(){
3046     for flag; do
3047         case $flag in
3048             -std=c99)           echo -c99                       ;;
3049             -mcpu=*)            echo -arch ${flag#*=}           ;;
3050             -mieee)             echo -ieee                      ;;
3051             -O*|-fast)          echo $flag                      ;;
3052             -fno-math-errno)    echo -assume nomath_errno       ;;
3053             -g)                 echo -g3                        ;;
3054             -Wall)              echo -msg_enable level2         ;;
3055             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3056             -Wl,*)              echo $flag                      ;;
3057             -f*|-W*)                                            ;;
3058             *)                  echo $flag                      ;;
3059         esac
3060    done
3061 }
3062
3063 cparser_flags(){
3064     for flag; do
3065         case $flag in
3066             -Wno-switch)             echo -Wno-switch-enum ;;
3067             -Wno-format-zero-length) ;;
3068             -Wdisabled-optimization) ;;
3069             -Wno-pointer-sign)       echo -Wno-other ;;
3070             *)                       echo $flag ;;
3071         esac
3072     done
3073 }
3074
3075 msvc_common_flags(){
3076     for flag; do
3077         case $flag in
3078             # In addition to specifying certain flags under the compiler
3079             # specific filters, they must be specified here as well or else the
3080             # generic catch all at the bottom will print the original flag.
3081             -Wall)                ;;
3082             -Wextra)              ;;
3083             -std=c99)             ;;
3084             # Common flags
3085             -fomit-frame-pointer) ;;
3086             -g)                   echo -Z7 ;;
3087             -fno-math-errno)      ;;
3088             -fno-common)          ;;
3089             -fno-signed-zeros)    ;;
3090             -fPIC)                ;;
3091             -mthumb)              ;;
3092             -march=*)             ;;
3093             -lz)                  echo zlib.lib ;;
3094             -lx264)               echo libx264.lib ;;
3095             -l*)                  echo ${flag#-l}.lib ;;
3096             -L*)                  echo -libpath:${flag#-L} ;;
3097             *)                    echo $flag ;;
3098         esac
3099     done
3100 }
3101
3102 msvc_flags(){
3103     msvc_common_flags "$@"
3104     for flag; do
3105         case $flag in
3106             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3107                                        -wd4554 ;;
3108             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3109                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3110                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3111                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3112         esac
3113     done
3114 }
3115
3116 icl_flags(){
3117     msvc_common_flags "$@"
3118     for flag; do
3119         case $flag in
3120             # Despite what Intel's documentation says -Wall, which is supported
3121             # on Windows, does enable remarks so disable them here.
3122             -Wall)                echo $flag -Qdiag-disable:remark ;;
3123             -std=c99)             echo -Qstd=c99 ;;
3124         esac
3125     done
3126 }
3127
3128 pgi_flags(){
3129     for flag; do
3130         case $flag in
3131             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3132             -fomit-frame-pointer) echo -Mnoframe ;;
3133             -g)                   echo -gopt ;;
3134             *)                    echo $flag ;;
3135         esac
3136     done
3137 }
3138
3139 suncc_flags(){
3140     for flag; do
3141         case $flag in
3142             -march=*|-mcpu=*)
3143                 case "${flag#*=}" in
3144                     native)                   echo -xtarget=native       ;;
3145                     v9|niagara)               echo -xarch=sparc          ;;
3146                     ultrasparc)               echo -xarch=sparcvis       ;;
3147                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3148                     i586|pentium)             echo -xchip=pentium        ;;
3149                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3150                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3151                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3152                     pentium4*)          echo -xtarget=pentium4           ;;
3153                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3154                     *-sse3)             echo -xarch=sse3                 ;;
3155                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3156                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3157                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3158                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3159                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3160                     k8|opteron|athlon64|athlon-fx)
3161                                                echo -xarch=sse2a         ;;
3162                     athlon*)                   echo -xarch=pentium_proa  ;;
3163                 esac
3164                 ;;
3165             -std=c99)             echo -xc99              ;;
3166             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3167             -fPIC)                echo -KPIC -xcode=pic32 ;;
3168             -W*,*)                echo $flag              ;;
3169             -f*-*|-W*|-mimpure-text)                      ;;
3170             -shared)              echo -G                 ;;
3171             *)                    echo $flag              ;;
3172         esac
3173     done
3174 }
3175
3176 tms470_flags(){
3177     for flag; do
3178         case $flag in
3179             -march=*|-mcpu=*)
3180                 case "${flag#*=}" in
3181                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3182                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3183                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3184                     armv6*|arm11*)          echo -mv=6   ;;
3185                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3186                                             echo -mv=5e  ;;
3187                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3188                 esac
3189                 ;;
3190             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3191             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3192             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3193             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3194             -msoft-float)   echo --float_support=vfplib       ;;
3195             -O[0-3]|-mf=*)  echo $flag                        ;;
3196             -g)             echo -g -mn                       ;;
3197             -pds=*)         echo $flag                        ;;
3198             -D*|-I*)        echo $flag                        ;;
3199             --gcc|--abi=*)  echo $flag                        ;;
3200             -me)            echo $flag                        ;;
3201         esac
3202     done
3203 }
3204
3205 probe_cc(){
3206     pfx=$1
3207     _cc=$2
3208
3209     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3210     unset _ld_o _ldflags _ld_lib _ld_path
3211     unset _depflags _DEPCMD _DEPFLAGS
3212     _flags_filter=echo
3213
3214     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3215         _type=llvm_gcc
3216         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3217         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3218         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3219         _cflags_speed='-O3'
3220         _cflags_size='-Os'
3221     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3222         _type=gcc
3223         gcc_version=$($_cc --version | head -n1)
3224         gcc_basever=$($_cc -dumpversion)
3225         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3226         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3227         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3228         if ! $_cc -dumpversion | grep -q '^2\.'; then
3229             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3230         fi
3231         _cflags_speed='-O3'
3232         _cflags_size='-Os'
3233     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3234         _type=icc
3235         _ident=$($_cc --version | head -n1)
3236         _depflags='-MMD'
3237         _cflags_speed='-O3'
3238         _cflags_size='-Os'
3239         _cflags_noopt='-O1'
3240     elif $_cc -v 2>&1 | grep -q xlc; then
3241         _type=xlc
3242         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3243         _cflags_speed='-O5'
3244         _cflags_size='-O5 -qcompact'
3245     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3246         _type=ccc
3247         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3248         _DEPFLAGS='-M'
3249         _cflags_speed='-fast'
3250         _cflags_size='-O1'
3251         _flags_filter=ccc_flags
3252     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3253         test -d "$sysroot" || die "No valid sysroot specified."
3254         _type=armcc
3255         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3256         armcc_conf="$PWD/armcc.conf"
3257         $_cc --arm_linux_configure                 \
3258              --arm_linux_config_file="$armcc_conf" \
3259              --configure_sysroot="$sysroot"        \
3260              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3261              die "Error creating armcc configuration file."
3262         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3263         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3264         as_default="${cross_prefix}gcc"
3265         _depflags='-MMD'
3266         _cflags_speed='-O3'
3267         _cflags_size='-Os'
3268     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3269         _type=tms470
3270         _ident=$($_cc -version | head -n1 | tr -s ' ')
3271         _flags='--gcc --abi=eabi -me'
3272         _cc_e='-ppl -fe=$@'
3273         _cc_o='-fe=$@'
3274         _depflags='-ppa -ppd=$(@:.o=.d)'
3275         _cflags_speed='-O3 -mf=5'
3276         _cflags_size='-O3 -mf=2'
3277         _flags_filter=tms470_flags
3278     elif $_cc -v 2>&1 | grep -q clang; then
3279         _type=clang
3280         _ident=$($_cc --version 2>/dev/null | head -n1)
3281         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3282         _cflags_speed='-O3'
3283         _cflags_size='-Os'
3284     elif $_cc -V 2>&1 | grep -q Sun; then
3285         _type=suncc
3286         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3287         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3288         _DEPFLAGS='-xM1 -xc99'
3289         _ldflags='-std=c99'
3290         _cflags_speed='-O5'
3291         _cflags_size='-O5 -xspace'
3292         _flags_filter=suncc_flags
3293     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3294         _type=pathscale
3295         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3296         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3297         _cflags_speed='-O2'
3298         _cflags_size='-Os'
3299         _flags_filter='filter_out -Wdisabled-optimization'
3300     elif $_cc -v 2>&1 | grep -q Open64; then
3301         _type=open64
3302         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3303         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3304         _cflags_speed='-O2'
3305         _cflags_size='-Os'
3306         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3307     elif $_cc -V 2>&1 | grep -q Portland; then
3308         _type=pgi
3309         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3310         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3311         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3312         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3313         _cflags_noopt="-O1"
3314         _flags_filter=pgi_flags
3315     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3316         _type=armasm
3317         _ident=$($_cc | head -n1)
3318         # 4509: "This form of conditional instruction is deprecated"
3319         _flags="-nologo -ignore 4509"
3320         _flags_filter=armasm_flags
3321     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3322         _type=msvc
3323         _ident=$($_cc 2>&1 | head -n1)
3324         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3325         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3326         _cflags_speed="-O2"
3327         _cflags_size="-O1"
3328         _cflags_noopt="-O1"
3329         if $_cc -nologo- 2>&1 | grep -q Linker; then
3330             _ld_o='-out:$@'
3331         else
3332             _ld_o='-Fe$@'
3333         fi
3334         _cc_o='-Fo$@'
3335         _cc_e='-P -Fi$@'
3336         _flags_filter=msvc_flags
3337         _ld_lib='lib%.a'
3338         _ld_path='-libpath:'
3339         _flags='-nologo'
3340     elif $_cc 2>&1 | grep -q Intel; then
3341         _type=icl
3342         _ident=$($_cc 2>&1 | head -n1)
3343         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3344         # Not only is O3 broken on 13.x+ but it is slower on all previous
3345         # versions (tested) as well.
3346         _cflags_speed="-O2"
3347         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3348         if $_cc 2>&1 | grep -q Linker; then
3349             _ld_o='-out:$@'
3350         else
3351             _ld_o='-Fe$@'
3352         fi
3353         _cc_o='-Fo$@'
3354         _cc_e='-P'
3355         _flags_filter=icl_flags
3356         _ld_lib='lib%.a'
3357         _ld_path='-libpath:'
3358         # -Qdiag-error to make icl error when seeing certain unknown arguments
3359         _flags='-nologo -Qdiag-error:4044,10157'
3360         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3361         # with MSVC which enables it by default.
3362         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3363     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3364         # lld can emulate multiple different linkers; in ms link.exe mode,
3365         # the -? parameter gives the help output which contains an identifyable
3366         # string, while it gives an error in other modes.
3367         _type=lld-link
3368         # The link.exe mode doesn't have a switch for getting the version,
3369         # but we can force it back to gnu mode and get the version from there.
3370         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3371         _ld_o='-out:$@'
3372         _flags_filter=msvc_flags
3373         _ld_lib='lib%.a'
3374         _ld_path='-libpath:'
3375     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3376         _type=cparser
3377         _ident=$($_cc --version | head -n1)
3378         _depflags='-MMD'
3379         _cflags_speed='-O4'
3380         _cflags_size='-O2'
3381         _flags_filter=cparser_flags
3382     fi
3383
3384     eval ${pfx}_type=\$_type
3385     eval ${pfx}_ident=\$_ident
3386 }
3387
3388 set_ccvars(){
3389     eval ${1}_C=\${_cc_c-\${${1}_C}}
3390     eval ${1}_E=\${_cc_e-\${${1}_E}}
3391     eval ${1}_O=\${_cc_o-\${${1}_O}}
3392
3393     if [ -n "$_depflags" ]; then
3394         eval ${1}_DEPFLAGS=\$_depflags
3395     else
3396         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3397         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3398         eval DEP${1}FLAGS=\$_flags
3399     fi
3400 }
3401
3402 probe_cc cc "$cc"
3403 cflags_filter=$_flags_filter
3404 cflags_speed=$_cflags_speed
3405 cflags_size=$_cflags_size
3406 cflags_noopt=$_cflags_noopt
3407 add_cflags $_flags $_cflags
3408 cc_ldflags=$_ldflags
3409 set_ccvars CC
3410
3411 probe_cc hostcc "$host_cc"
3412 host_cflags_filter=$_flags_filter
3413 host_cflags_speed=$_cflags_speed
3414 add_host_cflags  $_flags $_cflags
3415 set_ccvars HOSTCC
3416
3417 test -n "$cc_type" && enable $cc_type ||
3418     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3419
3420 : ${as_default:=$cc}
3421 : ${objcc_default:=$cc}
3422 : ${dep_cc_default:=$cc}
3423 : ${ld_default:=$cc}
3424 : ${host_ld_default:=$host_cc}
3425 set_default ar as objcc dep_cc ld host_ld
3426
3427 probe_cc as "$as"
3428 asflags_filter=$_flags_filter
3429 add_asflags $_flags $_cflags
3430 set_ccvars AS
3431
3432 probe_cc objcc "$objcc"
3433 objcflags_filter=$_flags_filter
3434 add_objcflags $_flags $_cflags
3435 set_ccvars OBJC
3436
3437 probe_cc ld "$ld"
3438 ldflags_filter=$_flags_filter
3439 add_ldflags $_flags $_ldflags
3440 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3441 LD_O=${_ld_o-$LD_O}
3442 LD_LIB=${_ld_lib-$LD_LIB}
3443 LD_PATH=${_ld_path-$LD_PATH}
3444
3445 probe_cc hostld "$host_ld"
3446 host_ldflags_filter=$_flags_filter
3447 add_host_ldflags $_flags $_ldflags
3448 HOSTLD_O=${_ld_o-$HOSTLD_O}
3449
3450 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3451     probe_cc depcc "$dep_cc"
3452     CCDEP=${_DEPCMD:-$DEPCMD}
3453     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3454     DEPCCFLAGS=$_flags
3455 fi
3456
3457 if $ar 2>&1 | grep -q Microsoft; then
3458     arflags="-nologo"
3459     ar_o='-out:$@'
3460 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3461     arflags="rq"
3462     ar_o='$@'
3463 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3464     arflags='-Xany -r -c'
3465     ar_o='$@'
3466 else
3467     arflags="rc"
3468     ar_o='$@'
3469 fi
3470
3471 add_cflags $extra_cflags
3472 add_objcflags $extra_objcflags
3473 add_asflags $extra_cflags
3474
3475 if test -n "$sysroot"; then
3476     case "$cc_type" in
3477         gcc|llvm_gcc|clang)
3478             add_cppflags --sysroot="$sysroot"
3479             add_ldflags --sysroot="$sysroot"
3480         ;;
3481         tms470)
3482             add_cppflags -I"$sysinclude"
3483             add_ldflags  --sysroot="$sysroot"
3484         ;;
3485     esac
3486 fi
3487
3488 if test "$cpu" = host; then
3489     enabled cross_compile &&
3490         die "--cpu=host makes no sense when cross-compiling."
3491
3492     case "$cc_type" in
3493         gcc|llvm_gcc)
3494             check_native(){
3495                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3496                 sed -n "/cc1.*$1=/{
3497                             s/.*$1=\\([^ ]*\\).*/\\1/
3498                             p
3499                             q
3500                         }" $TMPE
3501             }
3502             cpu=$(check_native -march || check_native -mcpu)
3503         ;;
3504     esac
3505
3506     test "${cpu:-host}" = host &&
3507         die "--cpu=host not supported with compiler $cc"
3508 fi
3509
3510 # Deal with common $arch aliases
3511 case "$arch" in
3512     aarch64|arm64)
3513         arch="aarch64"
3514     ;;
3515     arm*)
3516         arch="arm"
3517     ;;
3518     mips*|IP*)
3519         case "$arch" in
3520         *el)
3521             add_cppflags -EL
3522             add_ldflags -EL
3523         ;;
3524         *eb)
3525             add_cppflags -EB
3526             add_ldflags -EB
3527         ;;
3528         esac
3529         arch="mips"
3530     ;;
3531     parisc*|hppa*)
3532         arch="parisc"
3533     ;;
3534     "Power Macintosh"|ppc*|powerpc*)
3535         arch="ppc"
3536     ;;
3537     s390|s390x)
3538         arch="s390"
3539     ;;
3540     sh4|sh)
3541         arch="sh4"
3542     ;;
3543     sun4u|sparc*)
3544         arch="sparc"
3545     ;;
3546     tilegx|tile-gx)
3547         arch="tilegx"
3548     ;;
3549     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3550         arch="x86"
3551     ;;
3552 esac
3553
3554 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3555 enable $arch
3556
3557 # Add processor-specific flags
3558 if enabled aarch64; then
3559
3560     case $cpu in
3561         armv*)
3562             cpuflags="-march=$cpu"
3563         ;;
3564         *)
3565             cpuflags="-mcpu=$cpu"
3566         ;;
3567     esac
3568
3569 elif enabled alpha; then
3570
3571     cpuflags="-mcpu=$cpu"
3572
3573 elif enabled arm; then
3574
3575     check_arm_arch() {
3576         check_cpp_condition stddef.h \
3577             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3578             $cpuflags
3579     }
3580
3581     probe_arm_arch() {
3582         if   check_arm_arch 4;        then echo armv4
3583         elif check_arm_arch 4T;       then echo armv4t
3584         elif check_arm_arch 5;        then echo armv5
3585         elif check_arm_arch 5E;       then echo armv5e
3586         elif check_arm_arch 5T;       then echo armv5t
3587         elif check_arm_arch 5TE;      then echo armv5te
3588         elif check_arm_arch 5TEJ;     then echo armv5te
3589         elif check_arm_arch 6;        then echo armv6
3590         elif check_arm_arch 6J;       then echo armv6j
3591         elif check_arm_arch 6K;       then echo armv6k
3592         elif check_arm_arch 6Z;       then echo armv6z
3593         elif check_arm_arch 6ZK;      then echo armv6zk
3594         elif check_arm_arch 6T2;      then echo armv6t2
3595         elif check_arm_arch 7;        then echo armv7
3596         elif check_arm_arch 7A  7_A;  then echo armv7-a
3597         elif check_arm_arch 7S;       then echo armv7-a
3598         elif check_arm_arch 7R  7_R;  then echo armv7-r
3599         elif check_arm_arch 7M  7_M;  then echo armv7-m
3600         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3601         elif check_arm_arch 8A  8_A;  then echo armv8-a
3602         fi
3603     }
3604
3605     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3606
3607     case $cpu in
3608         armv*)
3609             cpuflags="-march=$cpu"
3610             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3611         ;;
3612         *)
3613             cpuflags="-mcpu=$cpu"
3614             case $cpu in
3615                 cortex-a*)                               subarch=armv7a  ;;
3616                 cortex-r*)                               subarch=armv7r  ;;
3617                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3618                 arm11*)                                  subarch=armv6   ;;
3619                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3620                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3621                 *)                             subarch=$(probe_arm_arch) ;;
3622             esac
3623         ;;
3624     esac
3625
3626     case "$subarch" in
3627         armv5t*)    enable fast_clz                ;;
3628         armv[6-8]*) enable fast_clz fast_unaligned ;;
3629     esac
3630
3631 elif enabled avr32; then
3632
3633     case $cpu in
3634         ap7[02]0[0-2])
3635             subarch="avr32_ap"
3636             cpuflags="-mpart=$cpu"
3637         ;;
3638         ap)
3639             subarch="avr32_ap"
3640             cpuflags="-march=$cpu"
3641         ;;
3642         uc3[ab]*)
3643             subarch="avr32_uc"
3644             cpuflags="-mcpu=$cpu"
3645         ;;
3646         uc)
3647             subarch="avr32_uc"
3648             cpuflags="-march=$cpu"
3649         ;;
3650     esac
3651
3652 elif enabled bfin; then
3653
3654     cpuflags="-mcpu=$cpu"
3655
3656 elif enabled mips; then
3657
3658     cpuflags="-march=$cpu"
3659
3660 elif enabled ppc; then
3661
3662     disable ldbrx
3663
3664     case $(tolower $cpu) in
3665         601|ppc601|powerpc601)
3666             cpuflags="-mcpu=601"
3667             disable altivec
3668         ;;
3669         603*|ppc603*|powerpc603*)
3670             cpuflags="-mcpu=603"
3671             disable altivec
3672         ;;
3673         604*|ppc604*|powerpc604*)
3674             cpuflags="-mcpu=604"
3675             disable altivec
3676         ;;
3677         g3|75*|ppc75*|powerpc75*)
3678             cpuflags="-mcpu=750"
3679             disable altivec
3680         ;;
3681         g4|745*|ppc745*|powerpc745*)
3682             cpuflags="-mcpu=7450"
3683             disable vsx
3684         ;;
3685         74*|ppc74*|powerpc74*)
3686             cpuflags="-mcpu=7400"
3687             disable vsx
3688         ;;
3689         g5|970|ppc970|powerpc970)
3690             cpuflags="-mcpu=970"
3691             disable vsx
3692         ;;
3693         power[3-6]*)
3694             cpuflags="-mcpu=$cpu"
3695             disable vsx
3696         ;;
3697         power[7-8]*)
3698             cpuflags="-mcpu=$cpu"
3699             enable ldbrx
3700         ;;
3701         cell)
3702             cpuflags="-mcpu=cell"
3703             enable ldbrx
3704             disable vsx
3705         ;;
3706         e500mc)
3707             cpuflags="-mcpu=e500mc"
3708             disable altivec
3709         ;;
3710         e500v2)
3711             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3712             disable altivec
3713             disable dcbzl
3714         ;;
3715         e500)
3716             cpuflags="-mcpu=8540 -mhard-float"
3717             disable altivec
3718             disable dcbzl
3719         ;;
3720     esac
3721
3722 elif enabled sparc; then
3723
3724     case $cpu in
3725         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3726             cpuflags="-mcpu=$cpu"
3727         ;;
3728         ultrasparc*|niagara[234])
3729             cpuflags="-mcpu=$cpu"
3730         ;;
3731     esac
3732
3733 elif enabled x86; then
3734
3735     case $cpu in
3736         i[345]86|pentium)
3737             cpuflags="-march=$cpu"
3738             disable i686
3739             disable mmx
3740         ;;
3741         # targets that do NOT support nopl and conditional mov (cmov)
3742         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3743             cpuflags="-march=$cpu"
3744             disable i686
3745         ;;
3746         # targets that do support nopl and conditional mov (cmov)
3747         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3748             cpuflags="-march=$cpu"
3749             enable i686
3750             enable fast_cmov
3751         ;;
3752         # targets that do support conditional mov but on which it's slow
3753         pentium4|pentium4m|prescott|nocona)
3754             cpuflags="-march=$cpu"
3755             enable i686
3756             disable fast_cmov
3757         ;;
3758     esac
3759
3760 fi
3761
3762 if [ "$cpu" != generic ]; then
3763     add_cflags  $cpuflags
3764     add_asflags $cpuflags
3765     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3766 fi
3767
3768 # compiler sanity check
3769 check_exec <<EOF
3770 int main(void){ return 0; }
3771 EOF
3772 if test "$?" != 0; then
3773     echo "$cc is unable to create an executable file."
3774     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3775         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3776         echo "Only do this if you know what cross compiling means."
3777     fi
3778     die "C compiler test failed."
3779 fi
3780
3781 add_cppflags -D_ISOC99_SOURCE
3782
3783 # some compilers silently accept -std=c11, so we also need to check that the
3784 # version macro is defined properly
3785 check_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3786     add_cflags -std=c11 ||
3787     check_cflags -std=c99
3788
3789 check_cppflags -D_FILE_OFFSET_BITS=64
3790 check_cppflags -D_LARGEFILE_SOURCE
3791
3792 add_host_cppflags -D_ISOC99_SOURCE
3793 check_host_cflags -std=c99
3794 check_host_cflags -Wall
3795 check_host_cflags $host_cflags_speed
3796
3797 check_64bit(){
3798     arch32=$1
3799     arch64=$2
3800     expr=$3
3801     check_code cc "" "int test[2*($expr) - 1]" &&
3802         subarch=$arch64 || subarch=$arch32
3803 }
3804
3805 case "$arch" in
3806     aarch64|alpha|ia64)
3807         spic=$shared
3808     ;;
3809     mips)
3810         check_64bit mips mips64 '_MIPS_SIM > 1'
3811         spic=$shared
3812     ;;
3813     parisc)
3814         check_64bit parisc parisc64 'sizeof(void *) > 4'
3815         spic=$shared
3816     ;;
3817     ppc)
3818         check_64bit ppc ppc64 'sizeof(void *) > 4'
3819         spic=$shared
3820     ;;
3821     s390)
3822         check_64bit s390 s390x 'sizeof(void *) > 4'
3823         spic=$shared
3824     ;;
3825     sparc)
3826         check_64bit sparc sparc64 'sizeof(void *) > 4'
3827         spic=$shared
3828     ;;
3829     x86)
3830         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3831         if test "$subarch" = "x86_64"; then
3832             spic=$shared
3833         fi
3834     ;;
3835 esac
3836
3837 enable $subarch
3838 enabled spic && enable_weak pic
3839
3840 # OS specific
3841 case $target_os in
3842     aix)
3843         SHFLAGS=-shared
3844         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3845         enabled shared && add_ldflags -Wl,-brtl
3846         ;;
3847     android)
3848         disable symver
3849         enable section_data_rel_ro
3850         SLIB_INSTALL_NAME='$(SLIBNAME)'
3851         SLIB_INSTALL_LINKS=
3852         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3853         ;;
3854     haiku)
3855         prefix_default="/boot/common"
3856         network_extralibs="-lnetwork"
3857         host_extralibs=
3858         ;;
3859     sunos)
3860         SHFLAGS='-shared -Wl,-h,$$(@F)'
3861         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3862         network_extralibs="-lsocket -lnsl"
3863         # When using suncc to build, the Solaris linker will mark
3864         # an executable with each instruction set encountered by
3865         # the Solaris assembler.  As our libraries contain their own
3866         # guards for processor-specific code, instead suppress
3867         # generation of the HWCAPS ELF section on Solaris x86 only.
3868         enabled_all suncc x86 &&
3869             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3870             add_ldflags -Wl,-M,mapfile
3871         nm_default='nm -P -g'
3872         version_script='-M'
3873         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3874         ;;
3875     netbsd)
3876         disable symver
3877         oss_indev_extralibs="-lossaudio"
3878         oss_outdev_extralibs="-lossaudio"
3879         ;;
3880     openbsd|bitrig)
3881         disable symver
3882         SHFLAGS='-shared'
3883         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3884         SLIB_INSTALL_LINKS=
3885         oss_indev_extralibs="-lossaudio"
3886         oss_outdev_extralibs="-lossaudio"
3887         ;;
3888     dragonfly)
3889         disable symver
3890         ;;
3891     freebsd)
3892         ;;
3893     bsd/os)
3894         add_extralibs -lpoll -lgnugetopt
3895         ;;
3896     darwin)
3897         enabled ppc && add_asflags -force_cpusubtype_ALL
3898         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3899         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3900         add_ldflags -Wl,-dynamic,-search_paths_first
3901         SLIBSUF=".dylib"
3902         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3903         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3904         objformat="macho"
3905         enabled x86_64 && objformat="macho64"
3906         enabled_any pic shared ||
3907             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3908         check_header dispatch/dispatch.h &&
3909             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3910         ;;
3911     msys*)
3912         die "Native MSYS builds are discouraged, please use the MINGW environment."
3913         ;;
3914     mingw32*|mingw64*)
3915         if test $target_os = "mingw32ce"; then
3916             disable network
3917         else
3918             target_os=mingw32
3919         fi
3920         LIBTARGET=i386
3921         if enabled x86_64; then
3922             LIBTARGET="i386:x86-64"
3923         elif enabled arm; then
3924             LIBTARGET=arm-wince
3925         fi
3926         check_ldflags -Wl,--nxcompat
3927         check_ldflags -Wl,--dynamicbase
3928         shlibdir_default="$bindir_default"
3929         SLIBPREF=""
3930         SLIBSUF=".dll"
3931         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3932         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3933         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3934         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3935         SLIB_INSTALL_LINKS=
3936         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3937         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3938         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3939         objformat="win32"
3940         dlltool="${cross_prefix}dlltool"
3941         ranlib=:
3942         enable dos_paths
3943         ;;
3944     win32|win64)
3945         disable symver
3946         if enabled shared; then
3947             # Link to the import library instead of the normal static library
3948             # for shared libs.
3949             LD_LIB='%.lib'
3950             # Cannot build both shared and static libs with MSVC or icl.
3951             disable static
3952         fi
3953         shlibdir_default="$bindir_default"
3954         SLIBPREF=""
3955         SLIBSUF=".dll"
3956         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3957         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3958         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3959         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3960         SLIB_INSTALL_LINKS=
3961         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3962         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3963         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3964         objformat="win32"
3965         ranlib=:
3966         enable dos_paths
3967         ;;
3968     cygwin*)
3969         target_os=cygwin
3970         shlibdir_default="$bindir_default"
3971         SLIBPREF="cyg"
3972         SLIBSUF=".dll"
3973         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3974         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3975         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3976         SLIB_INSTALL_LINKS=
3977         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3978         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3979         objformat="win32"
3980         enable dos_paths
3981         ;;
3982     *-dos|freedos|opendos)
3983         network_extralibs="-lsocket"
3984         objformat="coff"
3985         enable dos_paths
3986         add_cppflags -U__STRICT_ANSI__
3987         ;;
3988     linux)
3989         enable dv1394
3990         enable section_data_rel_ro
3991         ;;
3992     irix*)
3993         target_os=irix
3994         ranlib="echo ignoring ranlib"
3995         ;;
3996     os/2*)
3997         ln_s="cp -f"
3998         objformat="aout"
3999         add_cppflags -D_GNU_SOURCE
4000         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
4001         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4002         LIBSUF="_s.a"
4003         SLIBPREF=""
4004         SLIBSUF=".dll"
4005         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4006         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4007         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4008             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4009             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4010             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4011             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
4012         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4013             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4014         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4015         enable dos_paths
4016         ;;
4017     gnu/kfreebsd)
4018         add_cppflags -D_BSD_SOURCE
4019         ;;
4020     gnu)
4021         ;;
4022     qnx)
4023         add_cppflags -D_QNX_SOURCE
4024         network_extralibs="-lsocket"
4025         ;;
4026     symbian)
4027         SLIBSUF=".dll"
4028         enable dos_paths
4029         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4030         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4031         add_ldflags -Wl,--target1-abs,--no-undefined \
4032                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4033                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4034         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4035                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4036                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4037         ;;
4038     osf1)
4039         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4040         ;;
4041     minix)
4042         ;;
4043     none)
4044         ;;
4045     *)
4046         die "Unknown OS '$target_os'."
4047         ;;
4048 esac
4049
4050 # determine libc flavour
4051
4052 probe_libc(){
4053     pfx=$1
4054     pfx_no_=${pfx%_}
4055     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4056     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4057         eval ${pfx}libc_type=uclibc
4058         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4059     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4060         eval ${pfx}libc_type=glibc
4061         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4062     # MinGW headers can be installed on Cygwin, so check for newlib first.
4063     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4064         eval ${pfx}libc_type=newlib
4065         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4066     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4067     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4068         eval ${pfx}libc_type=mingw64
4069         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4070         eval test \$${pfx_no_}cc_type = "gcc" &&
4071             add_${pfx}cppflags -D__printf__=__gnu_printf__
4072     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4073          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4074         eval ${pfx}libc_type=mingw32
4075         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4076             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4077             die "ERROR: MinGW32 runtime version must be >= 3.15."
4078         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4079         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4080             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4081         eval test \$${pfx_no_}cc_type = "gcc" &&
4082             add_${pfx}cppflags -D__printf__=__gnu_printf__
4083     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4084         eval ${pfx}libc_type=msvcrt
4085         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4086             if [ "$pfx" = host_ ]; then
4087                 add_host_cppflags -Dsnprintf=_snprintf
4088             else
4089                 add_compat strtod.o strtod=avpriv_strtod
4090                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4091                                              _snprintf=avpriv_snprintf  \
4092                                              vsnprintf=avpriv_vsnprintf
4093             fi
4094         fi
4095         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4096         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4097         # 0x601 by default unless something else is set by the user.
4098         # This can easily lead to us detecting functions only present
4099         # in such new versions and producing binaries requiring windows 7.0.
4100         # Therefore explicitly set the default to XP unless the user has
4101         # set something else on the command line.
4102         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4103         # family. For these cases, configure is free to use any functions
4104         # found in the SDK headers by default. (Alternatively, we could force
4105         # _WIN32_WINNT to 0x0602 in that case.)
4106         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4107             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4108 #ifdef WINAPI_FAMILY
4109 #include <winapifamily.h>
4110 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4111 #error not desktop
4112 #endif
4113 #endif
4114 EOF
4115         if [ "$pfx" = "" ]; then
4116             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4117         fi
4118     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4119         eval ${pfx}libc_type=klibc
4120     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4121         eval ${pfx}libc_type=bionic
4122     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4123         eval ${pfx}libc_type=solaris
4124         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4125     else
4126         eval ${pfx}libc_type=default
4127         add_${pfx}cppflags -D_DEFAULT_SOURCE
4128     fi
4129 }
4130
4131 probe_libc
4132 test -n "$libc_type" && enable libc_$libc_type
4133 probe_libc host_
4134 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4135
4136 # hacks for compiler/libc/os combinations
4137
4138 case $libc_type in
4139     bionic)
4140         add_compat strtod.o strtod=avpriv_strtod
4141         ;;
4142     glibc)
4143         if enabled tms470; then
4144             CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4145             add_cppflags -D__USER_LABEL_PREFIX__=
4146             add_cppflags -D__builtin_memset=memset
4147             add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4148             add_cflags   -pds=48    # incompatible redefinition of macro
4149         elif enabled ccc; then
4150             add_ldflags -Wl,-z,now  # calls to libots crash without this
4151         fi
4152         ;;
4153 esac
4154
4155 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4156     add_cppflags '-I\$(SRC_PATH)/compat/float'
4157
4158 esc(){
4159     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4160 }
4161
4162 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
4163
4164 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4165
4166 set_default $PATHS_LIST
4167 set_default nm
4168
4169 # we need to build at least one lib type
4170 if ! enabled_any static shared; then
4171     cat <<EOF
4172 At least one library type must be built.
4173 Specify --enable-static to build the static libraries or --enable-shared to
4174 build the shared libraries as well. To only build the shared libraries specify
4175 --disable-static in addition to --enable-shared.
4176 EOF
4177     exit 1
4178 fi
4179
4180 disabled optimizations || check_cflags -fomit-frame-pointer
4181
4182 enable_weak_pic() {
4183     disabled pic && return
4184     enable pic
4185     add_cppflags -DPIC
4186     case "$target_os" in
4187     mingw*|cygwin*)
4188         ;;
4189     *)
4190         add_cflags -fPIC
4191         ;;
4192     esac
4193     add_asflags  -fPIC
4194 }
4195
4196 enabled pic && enable_weak_pic
4197
4198 check_cc <<EOF || die "Symbol mangling check failed."
4199 int ff_extern;
4200 EOF
4201 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4202 extern_prefix=${sym%%ff_extern*}
4203
4204 check_inline_asm inline_asm '"" ::'
4205
4206 _restrict=
4207 for restrict_keyword in restrict __restrict__ __restrict; do
4208     check_cc <<EOF && _restrict=$restrict_keyword && break
4209 void foo(char * $restrict_keyword p);
4210 EOF
4211 done
4212
4213 check_cc <<EOF && enable pragma_deprecated
4214 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4215 EOF
4216
4217 check_cc <<EOF && enable attribute_packed
4218 struct { int x; } __attribute__((packed)) x;
4219 EOF
4220
4221 check_cc <<EOF && enable attribute_may_alias
4222 union { int x; } __attribute__((may_alias)) x;
4223 EOF
4224
4225 check_cc <<EOF || die "endian test failed"
4226 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4227 EOF
4228 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4229
4230 check_gas() {
4231     log "check_gas using '$as' as AS"
4232     # :vararg is used on aarch64, arm and ppc altivec
4233     check_as <<EOF || return 1
4234 .macro m n, y:vararg=0
4235 \n: .int \y
4236 .endm
4237 m x
4238 EOF
4239     # .altmacro is only used in arm asm
4240     ! enabled arm || check_as <<EOF || return 1
4241 .altmacro
4242 EOF
4243     enable gnu_as
4244     return 0
4245 }
4246
4247 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4248     nogas=:
4249     enabled_any arm aarch64 && nogas=die
4250     enabled_all ppc altivec && nogas=warn
4251     as_noop=-v
4252
4253     case $as_type in
4254         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4255         gcc)  gaspp_as_type=gas ;;
4256         *)    gaspp_as_type=$as_type ;;
4257     esac
4258
4259     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4260
4261     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4262         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4263
4264     if ! check_gas ; then
4265         as=${gas:=$as}
4266         check_gas || \
4267             $nogas "GNU assembler not found, install/update gas-preprocessor"
4268     fi
4269
4270     check_as <<EOF && enable as_func
4271 .func test
4272 .endfunc
4273 EOF
4274 fi
4275
4276 check_inline_asm inline_asm_labels '"1:\n"'
4277
4278 if enabled aarch64; then
4279     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4280     # internal assembler in clang 3.3 does not support this instruction
4281     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4282     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4283
4284     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4285
4286 elif enabled alpha; then
4287
4288     check_cflags -mieee
4289
4290 elif enabled arm; then
4291
4292     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4293     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4294     enabled thumb && check_cflags -mthumb || check_cflags -marm
4295
4296     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4297         enable vfp_args
4298     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4299         enable vfp_args
4300     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4301         case "${cross_prefix:-$cc}" in
4302             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4303             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4304 __asm__ (".eabi_attribute 28, 1");
4305 int main(void) { return 0; }
4306 EOF
4307         esac
4308         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4309     fi
4310
4311     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4312     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4313     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4314     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4315     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4316     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4317
4318     [ $target_os = linux ] || [ $target_os = android ] ||
4319         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4320             $ARCH_EXT_LIST_ARM
4321
4322     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4323
4324     check_as <<EOF && enable as_dn_directive
4325 ra .dn d0.i16
4326 .unreq ra
4327 EOF
4328     check_as <<EOF && enable as_fpu_directive
4329 .fpu neon
4330 EOF
4331
4332     # llvm's integrated assembler supports .object_arch from llvm 3.5
4333     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4334 .object_arch armv4
4335 EOF
4336
4337     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4338
4339 elif enabled mips; then
4340
4341     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4342
4343     # make sure that only an instruction set is enabled
4344     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4345
4346     if enabled mips64; then
4347         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4348             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4349                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4350     else
4351         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4352             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4353                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4354     fi
4355
4356 elif enabled parisc; then
4357
4358     if enabled gcc; then
4359         case $($cc -dumpversion) in
4360             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4361         esac
4362     fi
4363
4364 elif enabled ppc; then
4365
4366     enable local_aligned_8 local_aligned_16 local_aligned_32
4367
4368     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4369     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4370     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4371     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4372
4373     # AltiVec flags: The FSF version of GCC differs from the Apple version
4374     if enabled altivec; then
4375         check_cflags -maltivec -mabi=altivec &&
4376         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4377         check_cflags -faltivec
4378
4379         # check if our compiler supports Motorola AltiVec C API
4380         check_cc <<EOF || disable altivec
4381 $inc_altivec_h
4382 int main(void) {
4383     vector signed int v1 = (vector signed int) { 0 };
4384     vector signed int v2 = (vector signed int) { 1 };
4385     v1 = vec_add(v1, v2);
4386     return 0;
4387 }
4388 EOF
4389
4390         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4391     fi
4392
4393     if enabled vsx; then
4394         check_cflags -mvsx &&
4395         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4396     fi
4397
4398     if enabled power8; then
4399         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4400     fi
4401
4402 elif enabled x86; then
4403
4404     check_builtin rdtsc    intrin.h   "__rdtsc()"
4405     check_builtin mm_empty mmintrin.h "_mm_empty()"
4406
4407     enable local_aligned_8 local_aligned_16 local_aligned_32
4408
4409     # check whether EBP is available on x86
4410     # As 'i' is stored on the stack, this program will crash
4411     # if the base pointer is used to access it because the
4412     # base pointer is cleared in the inline assembly code.
4413     check_exec_crash <<EOF && enable ebp_available
4414 volatile int i=0;
4415 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4416 return i;
4417 EOF
4418
4419     # check whether EBX is available on x86
4420     check_inline_asm ebx_available '""::"b"(0)' &&
4421         check_inline_asm ebx_available '"":::"%ebx"'
4422
4423     # check whether xmm clobbers are supported
4424     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4425
4426     # check whether binutils is new enough to compile SSSE3/MMXEXT
4427     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4428     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4429
4430     if ! disabled_any asm mmx yasm; then
4431         if check_cmd $yasmexe --version; then
4432             enabled x86_64 && yasm_extra="-m amd64"
4433             yasm_debug="-g dwarf2"
4434         elif check_cmd nasm -v; then
4435             yasmexe=nasm
4436             yasm_debug="-g -F dwarf"
4437             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4438         fi
4439
4440         YASMFLAGS="-f $objformat $yasm_extra"
4441         enabled pic               && append YASMFLAGS "-DPIC"
4442         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4443         case "$objformat" in
4444             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4445         esac
4446
4447         check_yasm "movbe ecx, [5]" && enable yasm ||
4448             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4449         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4450         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4451         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4452         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4453         check_yasm "CPU amdnop" || disable cpunop
4454     fi
4455
4456     case "$cpu" in
4457         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4458             disable fast_clz
4459         ;;
4460     esac
4461
4462 fi
4463
4464 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4465
4466 check_ldflags -Wl,--as-needed
4467
4468 if check_func dlopen; then
4469     ldl=
4470 elif check_func dlopen -ldl; then
4471     ldl=-ldl
4472 fi
4473
4474 if ! disabled network; then
4475     check_func getaddrinfo $network_extralibs
4476     check_func inet_aton $network_extralibs
4477
4478     check_type netdb.h "struct addrinfo"
4479     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4480     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4481     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4482     check_type poll.h "struct pollfd"
4483     check_type netinet/sctp.h "struct sctp_event_subscribe"
4484     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4485     check_type netinet/in.h "struct sockaddr_in6"
4486     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4487     check_type "sys/types.h sys/socket.h" socklen_t
4488
4489     # Prefer arpa/inet.h over winsock2
4490     if check_header arpa/inet.h ; then
4491         check_func closesocket
4492     elif check_header winsock2.h ; then
4493         check_func_headers winsock2.h closesocket -lws2 &&
4494             network_extralibs="-lws2" ||
4495         { check_func_headers winsock2.h closesocket -lws2_32 &&
4496             network_extralibs="-lws2_32"; } || disable winsock2_h network
4497         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4498
4499         check_type ws2tcpip.h socklen_t
4500         check_type ws2tcpip.h "struct addrinfo"
4501         check_type ws2tcpip.h "struct group_source_req"
4502         check_type ws2tcpip.h "struct ip_mreq_source"
4503         check_type ws2tcpip.h "struct ipv6_mreq"
4504         check_type winsock2.h "struct pollfd"
4505         check_struct winsock2.h "struct sockaddr" sa_len
4506         check_type ws2tcpip.h "struct sockaddr_in6"
4507         check_type ws2tcpip.h "struct sockaddr_storage"
4508     else
4509         disable network
4510     fi
4511 fi
4512
4513 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4514 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4515 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4516 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4517
4518 case "$custom_allocator" in
4519     jemalloc)
4520         # jemalloc by default does not use a prefix
4521         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4522     ;;
4523     tcmalloc)
4524         require_pkg_config "" libtcmalloc gperftools/tcmalloc.h tc_malloc
4525         malloc_prefix=tc_
4526     ;;
4527 esac
4528
4529 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4530 check_func  ${malloc_prefix}memalign            && enable memalign
4531 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4532
4533 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4534     check_func_headers time.h clock_gettime ||
4535         { check_lib clock_gettime time.h clock_gettime -lrt && LIBRT="-lrt"; }
4536
4537 check_func  fcntl
4538 check_func  fork
4539 check_func  gethrtime
4540 check_func  getopt
4541 check_func  getrusage
4542 check_func  gettimeofday
4543 check_func  gmtime_r
4544 check_func  isatty
4545 check_func  localtime_r
4546 check_func  mach_absolute_time
4547 check_func  mkstemp
4548 check_func  mmap
4549 check_func  mprotect
4550 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4551 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4552 check_func  sched_getaffinity
4553 check_func  setrlimit
4554 check_func  strerror_r
4555 check_func  sysconf
4556 check_func  sysctl
4557 check_func  usleep
4558
4559 check_func_headers io.h setmode
4560 check_func_headers stdlib.h getenv
4561
4562 check_func_headers windows.h GetProcessAffinityMask
4563 check_func_headers windows.h GetProcessTimes
4564 check_func_headers windows.h GetSystemTimeAsFileTime
4565 check_func_headers windows.h LoadLibrary
4566 check_func_headers windows.h MapViewOfFile
4567 check_func_headers windows.h SetConsoleTextAttribute
4568 check_func_headers windows.h Sleep
4569 check_func_headers windows.h VirtualAlloc
4570 check_struct windows.h "CONDITION_VARIABLE" Ptr
4571
4572 check_header d3d11.h
4573 check_header direct.h
4574 check_header dlfcn.h
4575 check_header dxva.h
4576 check_header dxva2api.h
4577 check_header io.h
4578 check_header mach/mach_time.h
4579 check_header malloc.h
4580 check_header poll.h
4581 check_header sys/mman.h
4582 check_header sys/param.h
4583 check_header sys/resource.h
4584 check_header sys/select.h
4585 check_header sys/time.h
4586 check_header sys/un.h
4587 check_header unistd.h
4588 check_header valgrind/valgrind.h
4589 check_header VideoDecodeAcceleration/VDADecoder.h
4590 check_header windows.h
4591 check_header X11/extensions/XvMClib.h
4592
4593 # it seems there are versions of clang in some distros that try to use the
4594 # gcc headers, which explodes for stdatomic
4595 # so we also check that atomics actually work here
4596 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4597
4598 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4599 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4600 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4601
4602 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4603
4604 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4605 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4606 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4607
4608 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4609 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4610 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4611 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4612 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4613 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4614 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4615 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4616
4617 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4618
4619 if ! disabled w32threads && ! enabled pthreads; then
4620     check_lib w32threads "windows.h process.h" _beginthreadex
4621 fi
4622
4623 # check for some common methods of building with pthread support
4624 # do this before the optional library checks as some of them require pthreads
4625 if ! disabled pthreads && ! enabled w32threads; then
4626     if check_lib pthreads pthread.h pthread_join -pthread; then
4627         add_cflags -pthread
4628     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4629         add_cflags -pthreads
4630     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4631         :
4632     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4633         :
4634     elif check_func pthread_join; then
4635         enable pthreads
4636     fi
4637 fi
4638
4639 enabled pthreads &&
4640     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4641
4642 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4643 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4644
4645 check_lib libm math.h sin -lm && LIBM="-lm"
4646
4647 atan2f_args=2
4648 ldexpf_args=2
4649 powf_args=2
4650
4651 for func in $MATH_FUNCS; do
4652     eval check_mathfunc $func \${${func}_args:-1} $LIBM
4653 done
4654
4655 # these are off by default, so fail if requested and not available
4656 enabled avisynth          && require_header avisynth/avisynth_c.h
4657 enabled avxsynth          && require avxsynth "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl
4658 enabled cuda              && require cuda cuda.h cuInit -lcuda
4659 enabled frei0r            && require_header frei0r.h
4660 enabled gnutls            && require_pkg_config "" gnutls gnutls/gnutls.h gnutls_global_init
4661 enabled libbs2b           && require_pkg_config "" libbs2b bs2b.h bs2b_open
4662 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4663 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4664 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4665 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4666 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4667 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4668 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4669                                    check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
4670                                done || die "ERROR: libgsm not found"; }
4671 enabled libhdcd           && require_pkg_config "" libhdcd "hdcd/hdcd_simple.h" hdcd_new
4672 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4673 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4674 enabled libmfx            && require_pkg_config "" libmfx "mfx/mfxvideo.h" MFXInit
4675 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4676 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4677 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4678 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4679 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4680 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4681 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4682                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4683 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4684 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4685 enabled librtmp           && require_pkg_config "" librtmp librtmp/rtmp.h RTMP_Socket
4686 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4687 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4688 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init -lspeex
4689 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4690 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4691 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4692 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4693 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4694 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4695     enabled libvpx_vp8_decoder && {
4696         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4697             disable libvpx_vp8_decoder;
4698     }
4699     enabled libvpx_vp8_encoder && {
4700         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4701             disable libvpx_vp8_encoder;
4702     }
4703     enabled libvpx_vp9_decoder && {
4704         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4705             disable libvpx_vp9_decoder;
4706     }
4707     enabled libvpx_vp9_encoder && {
4708         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4709             disable libvpx_vp9_encoder;
4710     }
4711     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4712         die "libvpx enabled but no supported decoders found"
4713     fi
4714 }
4715 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4716 enabled libwebp           && require_pkg_config "" libwebp webp/encode.h WebPGetEncoderVersion
4717 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4718                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4719                              { check_cpp_condition x264.h "X264_MPEG2" &&
4720                                enable libx262; }
4721 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4722                              require_cpp_condition x265.h "X265_BUILD >= 57"
4723 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4724 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4725 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4726                                { ! enabled cross_compile &&
4727                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4728                                  add_ldflags -L/opt/vc/lib/ &&
4729                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4730                                die "ERROR: mmal not found" &&
4731                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4732 enabled omx_rpi           && { check_header OMX_Core.h ||
4733                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4734                                die "ERROR: OpenMAX IL headers not found"; }
4735 enabled omx               && require_header OMX_Core.h
4736 enabled openssl           && { { check_pkg_config openssl openssl/ssl.h OPENSSL_init_ssl ||
4737                                  check_pkg_config openssl openssl/ssl.h SSL_library_init; } && {
4738                                add_cflags $openssl_cflags && add_extralibs $openssl_extralibs; } ||
4739                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4740                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4741                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4742                                die "ERROR: openssl not found"; }
4743
4744 enabled gnutls            && check_lib gmp gmp.h mpz_export -lgmp
4745
4746 if enabled nvenc; then
4747     require_header nvEncodeAPI.h
4748     require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4749 fi
4750
4751 if check_pkg_config "sdl >= 1.2.1 sdl < 1.3.0" SDL_events.h SDL_PollEvent; then
4752     enable sdl
4753 fi
4754
4755 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4756 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4757
4758 check_header linux/fb.h
4759 check_header linux/videodev2.h
4760 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4761
4762 check_header AVFoundation/AVFoundation.h
4763
4764 check_header sys/videoio.h
4765
4766 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4767 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4768 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4769 # w32api 3.12 had it defined wrong
4770 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4771
4772 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4773 { check_header dev/bktr/ioctl_meteor.h &&
4774   check_header dev/bktr/ioctl_bt848.h; } ||
4775 { check_header machine/ioctl_meteor.h &&
4776   check_header machine/ioctl_bt848.h; } ||
4777 { check_header dev/video/meteor/ioctl_meteor.h &&
4778   check_header dev/video/bktr/ioctl_bt848.h; } ||
4779 check_header dev/ic/bt8xx.h
4780
4781 check_header sys/soundcard.h
4782 check_header soundcard.h
4783
4784 enabled_any alsa_indev alsa_outdev &&
4785     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4786
4787 enabled jack_indev && check_lib jack jack/jack.h jack_client_open -ljack &&
4788     check_func jack_port_get_latency_range -ljack
4789
4790 enabled_any sndio_indev sndio_outdev && check_lib sndio sndio.h sio_open -lsndio
4791
4792 if enabled libcdio; then
4793     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4794     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4795     die "ERROR: No usable libcdio/cdparanoia found"
4796 fi
4797
4798 if enabled libxcb; then
4799     require_pkg_config libxcb xcb xcb/xcb.h xcb_connect
4800     require_pkg_config libxcb_shape 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