arm: Check for support for the .fpu directive
[ffmpeg.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --list-decoders          show all available decoders
67   --list-encoders          show all available encoders
68   --list-hwaccels          show all available hardware accelerators
69   --list-demuxers          show all available demuxers
70   --list-muxers            show all available muxers
71   --list-parsers           show all available parsers
72   --list-protocols         show all available protocols
73   --list-bsfs              show all available bitstream filters
74   --list-indevs            show all available input devices
75   --list-outdevs           show all available output devices
76   --list-filters           show all available filters
77
78 Standard options:
79   --logfile=FILE           log tests and output to FILE [config.log]
80   --disable-logging        do not log configure debug information
81   --prefix=PREFIX          install in PREFIX [$prefix]
82   --bindir=DIR             install binaries in DIR [PREFIX/bin]
83   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
84   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
85   --libdir=DIR             install libs in DIR [PREFIX/lib]
86   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
87   --incdir=DIR             install includes in DIR [PREFIX/include]
88   --mandir=DIR             install man page in DIR [PREFIX/share/man]
89   --enable-rpath           use rpath when linking programs [USE WITH CARE]
90
91 Licensing options:
92   --enable-gpl             allow use of GPL code, the resulting libs
93                            and binaries will be under GPL [no]
94   --enable-version3        upgrade (L)GPL to version 3 [no]
95   --enable-nonfree         allow use of nonfree code, the resulting libs
96                            and binaries will be unredistributable [no]
97
98 Configuration options:
99   --disable-static         do not build static libraries [no]
100   --enable-shared          build shared libraries [no]
101   --enable-small           optimize for size instead of speed
102   --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
103   --enable-gray            enable full grayscale support (slower color)
104   --disable-swscale-alpha  disable alpha channel support in swscale
105   --disable-all            disable building components, libraries and programs
106
107 Program options:
108   --disable-programs       do not build command line programs
109   --disable-avconv         disable avconv build
110   --disable-avplay         disable avplay build
111   --disable-avprobe        disable avprobe build
112   --disable-avserver       deprecated, does nothing
113
114 Component options:
115   --disable-doc            do not build documentation
116   --disable-avdevice       disable libavdevice build
117   --disable-avcodec        disable libavcodec build
118   --disable-avformat       disable libavformat build
119   --disable-avutil         disable libavutil build
120   --disable-swscale        disable libswscale build
121   --disable-avfilter       disable video filter support [no]
122   --disable-avresample     disable libavresample build [no]
123   --disable-pthreads       disable pthreads [auto]
124   --disable-w32threads     disable Win32 threads [auto]
125   --disable-network        disable network support [no]
126   --disable-dct            disable DCT code
127   --disable-error-resilience disable error resilience code
128   --disable-lsp            disable LSP code
129   --disable-lzo            disable LZO decoder code
130   --disable-mdct           disable MDCT code
131   --disable-rdft           disable RDFT code
132   --disable-fft            disable FFT code
133   --disable-faan           disable floating point AAN (I)DCT code
134
135 Individual component options:
136   --disable-everything     disable all components listed below
137   --disable-encoder=NAME   disable encoder NAME
138   --enable-encoder=NAME    enable encoder NAME
139   --disable-encoders       disable all encoders
140   --disable-decoder=NAME   disable decoder NAME
141   --enable-decoder=NAME    enable decoder NAME
142   --disable-decoders       disable all decoders
143   --disable-hwaccel=NAME   disable hwaccel NAME
144   --enable-hwaccel=NAME    enable hwaccel NAME
145   --disable-hwaccels       disable all hwaccels
146   --disable-muxer=NAME     disable muxer NAME
147   --enable-muxer=NAME      enable muxer NAME
148   --disable-muxers         disable all muxers
149   --disable-demuxer=NAME   disable demuxer NAME
150   --enable-demuxer=NAME    enable demuxer NAME
151   --disable-demuxers       disable all demuxers
152   --enable-parser=NAME     enable parser NAME
153   --disable-parser=NAME    disable parser NAME
154   --disable-parsers        disable all parsers
155   --enable-bsf=NAME        enable bitstream filter NAME
156   --disable-bsf=NAME       disable bitstream filter NAME
157   --disable-bsfs           disable all bitstream filters
158   --enable-protocol=NAME   enable protocol NAME
159   --disable-protocol=NAME  disable protocol NAME
160   --disable-protocols      disable all protocols
161   --enable-indev=NAME      enable input device NAME
162   --disable-indev=NAME     disable input device NAME
163   --disable-indevs         disable input devices
164   --enable-outdev=NAME     enable output device NAME
165   --disable-outdev=NAME    disable output device NAME
166   --disable-outdevs        disable output devices
167   --disable-devices        disable all devices
168   --enable-filter=NAME     enable filter NAME
169   --disable-filter=NAME    disable filter NAME
170   --disable-filters        disable all filters
171
172 External library support:
173
174   Using any of the following switches will allow Libav to link to the
175   corresponding external library. All the components depending on that library
176   will become enabled, if all their other dependencies are met and they are not
177   explicitly disabled. E.g. --enable-libwavpack will enable linking to
178   libwavpack and allow the libwavpack encoder to be built, unless it is
179   specifically disabled with --disable-encoder=libwavpack.
180
181   Note that only the system libraries are auto-detected. All the other external
182   libraries must be explicitly enabled.
183
184   Also note that the following help text describes the purpose of the libraries
185   themselves, not all their features will necessarily be usable by Libav.
186
187   --enable-avisynth          video frameserver
188   --enable-bzlib             bzip2 compression [autodetect]
189   --enable-frei0r            video filtering plugins
190   --enable-gnutls            crypto
191   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
192   --enable-libcdio           audio CD input
193   --enable-libdc1394         IEEE 1394/Firewire camera input
194   --enable-libdcadec         DCA audio decoding
195   --enable-libfaac           AAC audio encoding
196   --enable-libfdk-aac        AAC audio encoding/decoding
197   --enable-libfontconfig     font configuration and management
198   --enable-libfreetype       font rendering
199   --enable-libgsm            GSM audio encoding/decoding
200   --enable-libilbc           ILBC audio encoding/decoding
201   --enable-libkvazaar        HEVC video encoding
202   --enable-libmp3lame        MP3 audio encoding
203   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
204   --enable-libopencore-amrwb AMR-WB audio decoding
205   --enable-libopencv         computer vision
206   --enable-libopenh264       H.264 video encoding/decoding
207   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
208   --enable-libopus           Opus audio encoding/decoding
209   --enable-libpulse          Pulseaudio sound server
210   --enable-librtmp           RTMP streaming
211   --enable-libschroedinger   Dirac video encoding/decoding
212   --enable-libsnappy         snappy compression
213   --enable-libspeex          Speex audio encoding/decoding
214   --enable-libtheora         Theora video encoding/decoding
215   --enable-libtwolame        MP2 audio encoding
216   --enable-libvo-aacenc      AAC audio encoding
217   --enable-libvo-amrwbenc    AMR-WB audio encoding
218   --enable-libvorbis         Vorbis audio encoding/decoding
219   --enable-libvpx            VP* video encoding/decoding
220   --enable-libwavpack        Wavpack audio encoding/decoding
221   --enable-libwebp           WebP image encoding/decoding
222   --enable-libx264           H.264 video encoding
223   --enable-libx265           HEVC video encoding
224   --enable-libxavs           Chinese AVS video encoding
225   --enable-libxcb            X window system protocol communication
226   --enable-libxcb-shm        X11 shm communication [auto]
227   --enable-libxcb-xfixes     X11 mouse rendering [auto]
228   --enable-libxvid           MPEG-4 ASP video encoding
229   --enable-openssl           crypto
230   --enable-x11grab           X11 grabbing through xlib (legacy, use xcb instead)
231   --enable-zlib              compression [autodetect]
232
233   The following libraries provide various hardware acceleration features:
234   --enable-cuda    Nvidia CUDA (dynamically linked)
235   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
236   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
237   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
238   --enable-libnpp  Nvidia CUDA processing
239   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
240   --enable-nvenc   Nvidia video encoding
241   --enable-omx     OpenMAX IL
242   --enable-omx-rpi OpenMAX IL for Raspberry Pi
243   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
244   --enable-vda     Apple Video Decode Acceleration [auto]
245   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
246
247 Toolchain options:
248   --arch=ARCH              select architecture [$arch]
249   --cpu=CPU                select the minimum required CPU (affects
250                            instruction selection, may crash on older CPUs)
251   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
252   --enable-cross-compile   assume a cross-compiler is used
253   --sysroot=PATH           root of cross-build tree
254   --sysinclude=PATH        location of cross-build system headers
255   --target-os=OS           compiler targets OS [$target_os]
256   --target-exec=CMD        command to run executables on target
257   --target-path=DIR        path to view of build directory on target
258   --target-samples=DIR     path to samples directory on target
259   --toolchain=NAME         set tool defaults according to NAME
260   --nm=NM                  use nm tool
261   --ar=AR                  use archive tool AR [$ar_default]
262   --as=AS                  use assembler AS [$as_default]
263   --cc=CC                  use C compiler CC [$cc_default]
264   --objcc=OCC              use ObjC compiler OCC [$cc_default]
265   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
266   --ld=LD                  use linker LD
267   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
268   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
269   --host-cc=HOSTCC         use host C compiler HOSTCC
270   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
271   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
272   --host-ld=HOSTLD         use host linker HOSTLD
273   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
274   --host-libs=HLIBS        use libs HLIBS when linking for host
275   --host-os=OS             compiler host OS [$target_os]
276   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
277   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
278   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
279   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
280   --extra-libs=ELIBS       add ELIBS [$ELIBS]
281   --extra-version=STRING   version string suffix []
282   --optflags=OPTFLAGS      override optimization-related compiler flags
283   --build-suffix=SUFFIX    library name suffix []
284   --enable-pic             build position-independent code
285   --enable-thumb           compile for Thumb instruction set
286   --enable-lto             use link-time optimization
287   --env="ENV=override"     override the environment variables
288
289 Advanced options (experts only):
290   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
291   --custom-allocator=NAME  use a supported custom allocator
292   --disable-symver         disable symbol versioning
293   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
294   --disable-safe-bitstream-reader
295                            disable buffer boundary checking in bitreaders
296                            (faster, but may crash)
297   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
298   --enable-sram            allow use of on-chip SRAM
299
300 Optimization options (experts only):
301   --disable-asm            disable all assembly optimizations
302   --disable-altivec        disable AltiVec optimizations
303   --disable-vsx            disable VSX optimizations
304   --disable-power8         disable POWER8 optimizations
305   --disable-amd3dnow       disable 3DNow! optimizations
306   --disable-amd3dnowext    disable 3DNow! extended optimizations
307   --disable-mmx            disable MMX optimizations
308   --disable-mmxext         disable MMXEXT optimizations
309   --disable-sse            disable SSE optimizations
310   --disable-sse2           disable SSE2 optimizations
311   --disable-sse3           disable SSE3 optimizations
312   --disable-ssse3          disable SSSE3 optimizations
313   --disable-sse4           disable SSE4 optimizations
314   --disable-sse42          disable SSE4.2 optimizations
315   --disable-avx            disable AVX optimizations
316   --disable-xop            disable XOP optimizations
317   --disable-fma3           disable FMA3 optimizations
318   --disable-fma4           disable FMA4 optimizations
319   --disable-avx2           disable AVX2 optimizations
320   --disable-armv5te        disable armv5te optimizations
321   --disable-armv6          disable armv6 optimizations
322   --disable-armv6t2        disable armv6t2 optimizations
323   --disable-vfp            disable VFP optimizations
324   --disable-neon           disable NEON optimizations
325   --disable-inline-asm     disable use of inline assembly
326   --disable-yasm           disable use of nasm/yasm assembly
327
328 Developer options (useful when working on Libav itself):
329   --disable-debug          disable debugging symbols
330   --enable-debug=LEVEL     set the debug level [$debuglevel]
331   --disable-optimizations  disable compiler optimizations
332   --enable-extra-warnings  enable more compiler warnings
333   --samples=PATH           location of test samples for FATE, if not set use
334                            \$LIBAV_SAMPLES at make invocation time.
335   --enable-neon-clobber-test check NEON registers for clobbering (should be
336                            used only for debugging purposes)
337   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
338                            should be used only for debugging purposes)
339   --enable-random          randomly enable/disable components
340   --disable-random
341   --enable-random=LIST     randomly enable/disable specific components or
342   --disable-random=LIST    component groups. LIST is a comma-separated list
343                            of NAME[:PROB] entries where NAME is a component
344                            (group) and PROB the probability associated with
345                            NAME (default 0.5).
346   --random-seed=VALUE      seed value for --enable/disable-random
347   --disable-valgrind-backtrace do not print a backtrace under Valgrind
348                            (only applies to --disable-optimizations builds)
349
350 NOTE: Object files are built at the place where configure is launched.
351 EOF
352   exit 0
353 }
354
355 quotes='""'
356
357 log(){
358     echo "$@" >> $logfile
359 }
360
361 log_file(){
362     log BEGIN $1
363     i=1
364     while read line; do
365         printf '%5s   %s\n' "${i}" "${line}"
366         i=$(($i+1))
367     done < $1 >> $logfile
368     log END $1
369 }
370
371 echolog(){
372     log "$@"
373     echo "$@"
374 }
375
376 warn(){
377     log "WARNING: $*"
378     WARNINGS="${WARNINGS}WARNING: $*\n"
379 }
380
381 die(){
382     echolog "$@"
383     cat <<EOF
384
385 If you think configure made a mistake, make sure you are using the latest
386 version from Git.  If the latest version fails, report the problem to the
387 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
388 EOF
389     if disabled logging; then
390         cat <<EOF
391 Rerun configure with logging enabled (do not use --disable-logging), and
392 include the log this produces with your report.
393 EOF
394     else
395         cat <<EOF
396 Include the log file "$logfile" produced by configure as this will help
397 solving the problem.
398 EOF
399     fi
400     exit 1
401 }
402
403 # Avoid locale weirdness, besides we really just want to translate ASCII.
404 toupper(){
405     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
406 }
407
408 tolower(){
409     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
410 }
411
412 c_escape(){
413     echo "$*" | sed 's/["\\]/\\\0/g'
414 }
415
416 sh_quote(){
417     v=$(echo "$1" | sed "s/'/'\\\\''/g")
418     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
419     echo "$v"
420 }
421
422 cleanws(){
423     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
424 }
425
426 filter(){
427     pat=$1
428     shift
429     for v; do
430         eval "case $v in $pat) echo $v ;; esac"
431     done
432 }
433
434 filter_out(){
435     pat=$1
436     shift
437     for v; do
438         eval "case $v in $pat) ;; *) echo $v ;; esac"
439     done
440 }
441
442 map(){
443     m=$1
444     shift
445     for v; do eval $m; done
446 }
447
448 add_suffix(){
449     suffix=$1
450     shift
451     for v; do echo ${v}${suffix}; done
452 }
453
454 set_all(){
455     value=$1
456     shift
457     for var in $*; do
458         eval $var=$value
459     done
460 }
461
462 set_weak(){
463     value=$1
464     shift
465     for var; do
466         eval : \${$var:=$value}
467     done
468 }
469
470 sanitize_var_name(){
471     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
472 }
473
474 set_safe(){
475     var=$1
476     shift
477     eval $(sanitize_var_name "$var")='$*'
478 }
479
480 get_safe(){
481     eval echo \$$(sanitize_var_name "$1")
482 }
483
484 pushvar(){
485     for pvar in $*; do
486         eval level=\${${pvar}_level:=0}
487         eval ${pvar}_${level}="\$$pvar"
488         eval ${pvar}_level=$(($level+1))
489     done
490 }
491
492 popvar(){
493     for pvar in $*; do
494         eval level=\${${pvar}_level:-0}
495         test $level = 0 && continue
496         eval level=$(($level-1))
497         eval $pvar="\${${pvar}_${level}}"
498         eval ${pvar}_level=$level
499         eval unset ${pvar}_${level}
500     done
501 }
502
503 enable(){
504     set_all yes $*
505 }
506
507 disable(){
508     set_all no $*
509 }
510
511 enable_weak(){
512     set_weak yes $*
513 }
514
515 disable_weak(){
516     set_weak no $*
517 }
518
519 enable_safe(){
520     for var; do
521         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
522     done
523 }
524
525 disable_safe(){
526     for var; do
527         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
528     done
529 }
530
531 do_enable_deep(){
532     for var; do
533         enabled $var && continue
534         eval sel="\$${var}_select"
535         eval sgs="\$${var}_suggest"
536         pushvar var sgs
537         enable_deep $sel
538         popvar sgs
539         enable_deep_weak $sgs
540         popvar var
541     done
542 }
543
544 enable_deep(){
545     do_enable_deep $*
546     enable $*
547 }
548
549 enable_deep_weak(){
550     for var; do
551         disabled $var && continue
552         pushvar var
553         do_enable_deep $var
554         popvar var
555         enable_weak $var
556     done
557 }
558
559 enabled(){
560     test "${1#!}" = "$1" && op== || op=!=
561     eval test "x\$${1#!}" $op "xyes"
562 }
563
564 disabled(){
565     test "${1#!}" = "$1" && op== || op=!=
566     eval test "x\$${1#!}" $op "xno"
567 }
568
569 enabled_all(){
570     for opt; do
571         enabled $opt || return 1
572     done
573 }
574
575 disabled_all(){
576     for opt; do
577         disabled $opt || return 1
578     done
579 }
580
581 enabled_any(){
582     for opt; do
583         enabled $opt && return 0
584     done
585 }
586
587 disabled_any(){
588     for opt; do
589         disabled $opt && return 0
590     done
591     return 1
592 }
593
594 set_default(){
595     for opt; do
596         eval : \${$opt:=\$${opt}_default}
597     done
598 }
599
600 is_in(){
601     value=$1
602     shift
603     for var in $*; do
604         [ $var = $value ] && return 0
605     done
606     return 1
607 }
608
609 do_check_deps(){
610     for cfg; do
611         cfg="${cfg#!}"
612         enabled ${cfg}_checking && die "Circular dependency for $cfg."
613         disabled ${cfg}_checking && continue
614         enable ${cfg}_checking
615         append allopts $cfg
616
617         eval dep_all="\$${cfg}_deps"
618         eval dep_any="\$${cfg}_deps_any"
619         eval dep_sel="\$${cfg}_select"
620         eval dep_sgs="\$${cfg}_suggest"
621         eval dep_ifa="\$${cfg}_if"
622         eval dep_ifn="\$${cfg}_if_any"
623
624         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
625         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
626         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
627
628         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
629         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
630         enabled_all  $dep_all || disable $cfg
631         enabled_any  $dep_any || disable $cfg
632         disabled_any $dep_sel && disable $cfg
633
634         if enabled $cfg; then
635             enable_deep $dep_sel
636             enable_deep_weak $dep_sgs
637         fi
638
639         disable ${cfg}_checking
640     done
641 }
642
643 check_deps(){
644     unset allopts
645
646     do_check_deps "$@"
647
648     for cfg in $allopts; do
649         enabled $cfg || continue
650         eval dep_extralibs="\$${cfg}_extralibs"
651         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
652     done
653 }
654
655 print_config(){
656     pfx=$1
657     files=$2
658     shift 2
659     map 'eval echo "$v \${$v:-no}"' "$@" |
660     awk "BEGIN { split(\"$files\", files) }
661         {
662             c = \"$pfx\" toupper(\$1);
663             v = \$2;
664             sub(/yes/, 1, v);
665             sub(/no/,  0, v);
666             for (f in files) {
667                 file = files[f];
668                 if (file ~ /\\.h\$/) {
669                     printf(\"#define %s %d\\n\", c, v) >>file;
670                 } else if (file ~ /\\.asm\$/) {
671                     printf(\"%%define %s %d\\n\", c, v) >>file;
672                 } else if (file ~ /\\.mak\$/) {
673                     n = -v ? \"\" : \"!\";
674                     printf(\"%s%s=yes\\n\", n, c) >>file;
675                 }
676             }
677         }"
678 }
679
680 print_enabled(){
681     suf=$1
682     shift
683     for v; do
684         enabled $v && printf "%s\n" ${v%$suf}
685     done
686 }
687
688 append(){
689     var=$1
690     shift
691     eval "$var=\"\$$var $*\""
692 }
693
694 prepend(){
695     var=$1
696     shift
697     eval "$var=\"$* \$$var\""
698 }
699
700 unique(){
701     var=$1
702     uniq_list=""
703     for tok in $(eval echo \$$var); do
704         uniq_list="$(filter_out $tok $uniq_list) $tok"
705     done
706     eval "$var=\"${uniq_list}\""
707 }
708
709 add_cppflags(){
710     append CPPFLAGS "$@"
711 }
712
713 add_cflags(){
714     append CFLAGS $($cflags_filter "$@")
715 }
716
717 add_asflags(){
718     append ASFLAGS $($asflags_filter "$@")
719 }
720
721 add_objcflags(){
722     append OBJCFLAGS $($objcflags_filter "$@")
723 }
724
725 add_ldflags(){
726     append LDFLAGS $($ldflags_filter "$@")
727 }
728
729 add_ldexeflags(){
730     append LDEXEFLAGS $($ldflags_filter "$@")
731 }
732
733 add_stripflags(){
734     append STRIPFLAGS "$@"
735 }
736
737 add_extralibs(){
738     prepend extralibs $($ldflags_filter "$@")
739 }
740
741 add_host_cppflags(){
742     append host_cppflags "$@"
743 }
744
745 add_host_cflags(){
746     append host_cflags $($host_cflags_filter "$@")
747 }
748
749 add_host_ldflags(){
750     append host_ldflags $($host_ldflags_filter "$@")
751 }
752
753 add_compat(){
754     append compat_objs $1
755     shift
756     map 'add_cppflags -D$v' "$@"
757 }
758
759 check_cmd(){
760     log "$@"
761     "$@" >> $logfile 2>&1
762 }
763
764 cc_o(){
765     eval printf '%s\\n' $CC_O
766 }
767
768 cc_e(){
769     eval printf '%s\\n' $CC_E
770 }
771
772 check_cc(){
773     log check_cc "$@"
774     cat > $TMPC
775     log_file $TMPC
776     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
777 }
778
779 check_objcc(){
780     log check_objcc "$@"
781     cat > $TMPC
782     log_file $TMPC
783     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
784 }
785
786 check_cpp(){
787     log check_cpp "$@"
788     cat > $TMPC
789     log_file $TMPC
790     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
791 }
792
793 as_o(){
794     eval printf '%s\\n' $AS_O
795 }
796
797 check_as(){
798     log check_as "$@"
799     cat > $TMPS
800     log_file $TMPS
801     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
802 }
803
804 check_inline_asm(){
805     log check_inline_asm "$@"
806     name="$1"
807     code="$2"
808     shift 2
809     disable $name
810     check_cc "$@" <<EOF && enable $name
811 void foo(void){ __asm__ volatile($code); }
812 EOF
813 }
814
815 check_insn(){
816     log check_insn "$@"
817     check_inline_asm ${1}_inline "\"$2\""
818     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
819 }
820
821 check_yasm(){
822     log check_yasm "$@"
823     echo "$1" > $TMPS
824     log_file $TMPS
825     shift 1
826     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
827 }
828
829 ld_o(){
830     eval printf '%s\\n' $LD_O
831 }
832
833 check_ld(){
834     log check_ld "$@"
835     flags=$(filter_out '-l*' "$@")
836     libs=$(filter '-l*' "$@")
837     check_cc $($cflags_filter $flags) || return
838     flags=$($ldflags_filter $flags)
839     libs=$($ldflags_filter $libs)
840     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
841 }
842
843 print_include(){
844     hdr=$1
845     test "${hdr%.h}" = "${hdr}" &&
846         echo "#include $hdr"    ||
847         echo "#include <$hdr>"
848 }
849
850 check_code(){
851     log check_code "$@"
852     check=$1
853     headers=$2
854     code=$3
855     shift 3
856     {
857         for hdr in $headers; do
858             print_include $hdr
859         done
860         echo "int main(void) { $code; return 0; }"
861     } | check_$check "$@"
862 }
863
864 check_cppflags(){
865     log check_cppflags "$@"
866     check_cc "$@" <<EOF && append CPPFLAGS "$@"
867 int x;
868 EOF
869 }
870
871 test_cflags(){
872     log test_cflags "$@"
873     set -- $($cflags_filter "$@")
874     check_cc "$@" <<EOF
875 int x;
876 EOF
877 }
878
879 check_cflags(){
880     log check_cflags "$@"
881     test_cflags "$@" && add_cflags "$@"
882 }
883
884 test_objcflags(){
885     log test_cflags "$@"
886     set -- $($cflags_filter "$@")
887     check_objcc "$@" <<EOF
888 int x;
889 EOF
890 }
891
892 check_objcflags(){
893     log check_cflags "$@"
894     test_objcflags "$@" && add_objcflags "$@"
895 }
896
897 test_ldflags(){
898     log test_ldflags "$@"
899     check_ld "$@" <<EOF
900 int main(void){ return 0; }
901 EOF
902 }
903
904 check_ldflags(){
905     log check_ldflags "$@"
906     test_ldflags "$@" && add_ldflags "$@"
907 }
908
909 test_stripflags(){
910     log test_stripflags "$@"
911     # call check_cc to get a fresh TMPO
912     check_cc <<EOF
913 int main(void) { return 0; }
914 EOF
915     check_cmd $strip $STRIPFLAGS "$@" $TMPO
916 }
917
918 check_stripflags(){
919     log check_stripflags "$@"
920     test_stripflags "$@" && add_stripflags "$@"
921 }
922
923 check_header(){
924     log check_header "$@"
925     header=$1
926     shift
927     disable_safe $header
928     check_cpp "$@" <<EOF && enable_safe $header
929 #include <$header>
930 int x;
931 EOF
932 }
933
934 check_func(){
935     log check_func "$@"
936     func=$1
937     shift
938     disable $func
939     check_ld "$@" <<EOF && enable $func
940 extern int $func();
941 int main(void){ $func(); }
942 EOF
943 }
944
945 check_mathfunc(){
946     log check_mathfunc "$@"
947     func=$1
948     narg=$2
949     shift 2
950     test $narg = 2 && args="f, g" || args="f"
951     disable $func
952     check_ld "$@" <<EOF && enable $func
953 #include <math.h>
954 float foo(float f, float g) { return $func($args); }
955 int main(void){ return 0; }
956 EOF
957 }
958
959 check_func_headers(){
960     log check_func_headers "$@"
961     headers=$1
962     funcs=$2
963     shift 2
964     {
965         for hdr in $headers; do
966             print_include $hdr
967         done
968         for func in $funcs; do
969             echo "long check_$func(void) { return (long) $func; }"
970         done
971         echo "int main(void) { return 0; }"
972     } | check_ld "$@" && enable $funcs && enable_safe $headers
973 }
974
975 check_cpp_condition(){
976     log check_cpp_condition "$@"
977     header=$1
978     condition=$2
979     shift 2
980     check_cpp "$@" <<EOF
981 #include <$header>
982 #if !($condition)
983 #error "unsatisfied condition: $condition"
984 #endif
985 EOF
986 }
987
988 check_lib(){
989     log check_lib "$@"
990     header="$1"
991     func="$2"
992     shift 2
993     check_header $header && check_func $func "$@" && add_extralibs "$@"
994 }
995
996 check_lib2(){
997     log check_lib2 "$@"
998     headers="$1"
999     funcs="$2"
1000     shift 2
1001     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1002 }
1003
1004 check_pkg_config(){
1005     log check_pkg_config "$@"
1006     pkg="$1"
1007     headers="$2"
1008     funcs="$3"
1009     shift 3
1010     check_cmd $pkg_config --exists --print-errors $pkg || return
1011     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1012     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1013     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1014         set_safe "${pkg}_cflags" $pkg_cflags   &&
1015         set_safe "${pkg}_libs"   $pkg_libs
1016 }
1017
1018 check_exec(){
1019     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1020 }
1021
1022 check_exec_crash(){
1023     code=$(cat)
1024
1025     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1026     # are safe but may not be available everywhere.  Thus we use
1027     # raise(SIGTERM) instead.  The check is run in a subshell so we
1028     # can redirect the "Terminated" message from the shell.  SIGBUS
1029     # is not defined by standard C so it is used conditionally.
1030
1031     (check_exec "$@") >> $logfile 2>&1 <<EOF
1032 #include <signal.h>
1033 static void sighandler(int sig){
1034     raise(SIGTERM);
1035 }
1036 int foo(void){
1037     $code
1038 }
1039 int (*func_ptr)(void) = foo;
1040 int main(void){
1041     signal(SIGILL, sighandler);
1042     signal(SIGFPE, sighandler);
1043     signal(SIGSEGV, sighandler);
1044 #ifdef SIGBUS
1045     signal(SIGBUS, sighandler);
1046 #endif
1047     return func_ptr();
1048 }
1049 EOF
1050 }
1051
1052 check_type(){
1053     log check_type "$@"
1054     headers=$1
1055     type=$2
1056     shift 2
1057     disable_safe "$type"
1058     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1059 }
1060
1061 check_struct(){
1062     log check_struct "$@"
1063     headers=$1
1064     struct=$2
1065     member=$3
1066     shift 3
1067     disable_safe "${struct}_${member}"
1068     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1069         enable_safe "${struct}_${member}"
1070 }
1071
1072 check_builtin(){
1073     log check_builtin "$@"
1074     name=$1
1075     headers=$2
1076     builtin=$3
1077     shift 3
1078     disable "$name"
1079     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1080 }
1081
1082 check_compile_assert(){
1083     log check_compile_assert "$@"
1084     name=$1
1085     headers=$2
1086     condition=$3
1087     shift 3
1088     disable "$name"
1089     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1090 }
1091
1092 require(){
1093     name="$1"
1094     header="$2"
1095     func="$3"
1096     shift 3
1097     check_lib $header $func "$@" || die "ERROR: $name not found"
1098 }
1099
1100 require2(){
1101     name="$1"
1102     headers="$2"
1103     func="$3"
1104     shift 3
1105     check_lib2 "$headers" $func "$@" || die "ERROR: $name not found"
1106 }
1107
1108 require_pkg_config(){
1109     pkg="$1"
1110     check_pkg_config "$@" || die "ERROR: $pkg not found"
1111     add_cflags    $(get_safe "${pkg}_cflags")
1112     add_extralibs $(get_safe "${pkg}_libs")
1113 }
1114
1115 hostcc_e(){
1116     eval printf '%s\\n' $HOSTCC_E
1117 }
1118
1119 hostcc_o(){
1120     eval printf '%s\\n' $HOSTCC_O
1121 }
1122
1123 check_host_cc(){
1124     log check_host_cc "$@"
1125     cat > $TMPC
1126     log_file $TMPC
1127     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1128 }
1129
1130 check_host_cpp(){
1131     log check_host_cpp "$@"
1132     cat > $TMPC
1133     log_file $TMPC
1134     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1135 }
1136
1137 check_host_cppflags(){
1138     log check_host_cppflags "$@"
1139     check_host_cc "$@" <<EOF && append host_cppflags "$@"
1140 int x;
1141 EOF
1142 }
1143
1144 check_host_cflags(){
1145     log check_host_cflags "$@"
1146     set -- $($host_cflags_filter "$@")
1147     check_host_cc "$@" <<EOF && append host_cflags "$@"
1148 int x;
1149 EOF
1150 }
1151
1152 check_host_cpp_condition(){
1153     log check_host_cpp_condition "$@"
1154     header=$1
1155     condition=$2
1156     shift 2
1157     check_host_cpp "$@" <<EOF
1158 #include <$header>
1159 #if !($condition)
1160 #error "unsatisfied condition: $condition"
1161 #endif
1162 EOF
1163 }
1164
1165 apply(){
1166     file=$1
1167     shift
1168     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1169 }
1170
1171 cp_if_changed(){
1172     cmp -s "$1" "$2" && echo "$2 is unchanged" && return
1173     mkdir -p "$(dirname $2)"
1174     $cp_f "$1" "$2"
1175 }
1176
1177 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1178 # system-dependent things.
1179
1180 AVCODEC_COMPONENTS="
1181     bsfs
1182     decoders
1183     encoders
1184     hwaccels
1185     parsers
1186 "
1187
1188 AVDEVICE_COMPONENTS="
1189     indevs
1190     outdevs
1191 "
1192 AVFILTER_COMPONENTS="
1193     filters
1194 "
1195 AVFORMAT_COMPONENTS="
1196     demuxers
1197     muxers
1198     protocols
1199 "
1200
1201 AVRESAMPLE_COMPONENTS=""
1202 AVUTIL_COMPONENTS=""
1203
1204 COMPONENT_LIST="
1205     $AVCODEC_COMPONENTS
1206     $AVDEVICE_COMPONENTS
1207     $AVFILTER_COMPONENTS
1208     $AVFORMAT_COMPONENTS
1209     $AVRESAMPLE_COMPONENTS
1210     $AVUTIL_COMPONENTS
1211 "
1212
1213 EXAMPLE_LIST="
1214     avcodec_example
1215     filter_audio_example
1216     metadata_example
1217     output_example
1218     qsvdec_example
1219     transcode_aac_example
1220 "
1221
1222 HWACCEL_LIBRARY_LIST="
1223     cuda
1224     d3d11va
1225     dxva2
1226     libmfx
1227     libnpp
1228     mmal
1229     nvenc
1230     omx
1231     vaapi
1232     vda
1233     vdpau
1234 "
1235
1236 EXTERNAL_LIBRARY_LIST="
1237     avisynth
1238     bzlib
1239     frei0r
1240     gnutls
1241     libbs2b
1242     libcdio
1243     libdc1394
1244     libdcadec
1245     libfaac
1246     libfdk_aac
1247     libfontconfig
1248     libfreetype
1249     libgsm
1250     libilbc
1251     libkvazaar
1252     libmp3lame
1253     libopencore_amrnb
1254     libopencore_amrwb
1255     libopencv
1256     libopenh264
1257     libopenjpeg
1258     libopus
1259     libpulse
1260     librtmp
1261     libschroedinger
1262     libsnappy
1263     libspeex
1264     libtheora
1265     libtwolame
1266     libvo_aacenc
1267     libvo_amrwbenc
1268     libvorbis
1269     libvpx
1270     libwavpack
1271     libwebp
1272     libx264
1273     libx265
1274     libxavs
1275     libxcb
1276     libxcb_shm
1277     libxcb_xfixes
1278     libxvid
1279     openssl
1280     x11grab
1281     zlib
1282 "
1283
1284 FEATURE_LIST="
1285     gray
1286     hardcoded_tables
1287     omx_rpi
1288     runtime_cpudetect
1289     safe_bitstream_reader
1290     shared
1291     small
1292     sram
1293     static
1294     swscale_alpha
1295 "
1296
1297 LIBRARY_LIST="
1298     avcodec
1299     avdevice
1300     avfilter
1301     avformat
1302     avresample
1303     avutil
1304     swscale
1305 "
1306
1307 LICENSE_LIST="
1308     gpl
1309     nonfree
1310     version3
1311 "
1312
1313 PROGRAM_LIST="
1314     avconv
1315     avplay
1316     avprobe
1317 "
1318
1319 SUBSYSTEM_LIST="
1320     dct
1321     doc
1322     error_resilience
1323     faan
1324     fft
1325     lsp
1326     lzo
1327     mdct
1328     network
1329     rdft
1330 "
1331
1332 CONFIG_LIST="
1333     $COMPONENT_LIST
1334     $EXAMPLE_LIST
1335     $EXTERNAL_LIBRARY_LIST
1336     $HWACCEL_LIBRARY_LIST
1337     $FEATURE_LIST
1338     $LICENSE_LIST
1339     $LIBRARY_LIST
1340     $PROGRAM_LIST
1341     $SUBSYSTEM_LIST
1342     memalign_hack
1343     neon_clobber_test
1344     pic
1345     pod2man
1346     texi2html
1347     thumb
1348     valgrind_backtrace
1349     xmm_clobber_test
1350 "
1351
1352 THREADS_LIST="
1353     pthreads
1354     w32threads
1355 "
1356
1357 ATOMICS_LIST="
1358     atomics_gcc
1359     atomics_suncc
1360     atomics_win32
1361 "
1362
1363 ARCH_LIST="
1364     aarch64
1365     alpha
1366     arm
1367     avr32
1368     avr32_ap
1369     avr32_uc
1370     bfin
1371     ia64
1372     m68k
1373     mips
1374     mips64
1375     parisc
1376     ppc
1377     ppc64
1378     s390
1379     sh4
1380     sparc
1381     sparc64
1382     tilegx
1383     tilepro
1384     tomi
1385     x86
1386     x86_32
1387     x86_64
1388 "
1389
1390 ARCH_EXT_LIST_ARM="
1391     armv5te
1392     armv6
1393     armv6t2
1394     armv8
1395     neon
1396     vfp
1397     vfpv3
1398 "
1399
1400 ARCH_EXT_LIST_X86_SIMD="
1401     amd3dnow
1402     amd3dnowext
1403     avx
1404     avx2
1405     fma3
1406     fma4
1407     mmx
1408     mmxext
1409     sse
1410     sse2
1411     sse3
1412     sse4
1413     sse42
1414     ssse3
1415     xop
1416 "
1417
1418 ARCH_EXT_LIST_PPC="
1419     altivec
1420     dcbzl
1421     ldbrx
1422     power8
1423     ppc4xx
1424     vsx
1425 "
1426
1427 ARCH_EXT_LIST_X86="
1428     $ARCH_EXT_LIST_X86_SIMD
1429     cpunop
1430     i686
1431 "
1432
1433 ARCH_EXT_LIST_MIPS="
1434     loongson
1435     mips32r1
1436     mips64r1
1437     mips32r2
1438     mips64r2
1439     mips32r6
1440     mips64r6
1441 "
1442
1443 ARCH_EXT_LIST="
1444     $ARCH_EXT_LIST_ARM
1445     $ARCH_EXT_LIST_MIPS
1446     $ARCH_EXT_LIST_PPC
1447     $ARCH_EXT_LIST_X86
1448     vis
1449 "
1450
1451 ARCH_FEATURES="
1452     aligned_stack
1453     fast_64bit
1454     fast_clz
1455     fast_cmov
1456     local_aligned_8
1457     local_aligned_16
1458     simd_align_16
1459 "
1460
1461 BUILTIN_LIST="
1462     atomic_cas_ptr
1463     machine_rw_barrier
1464     MemoryBarrier
1465     mm_empty
1466     rdtsc
1467     sem_timedwait
1468     sync_val_compare_and_swap
1469 "
1470 HAVE_LIST_CMDLINE="
1471     inline_asm
1472     symver
1473     yasm
1474 "
1475
1476 HAVE_LIST_PUB="
1477     bigendian
1478     fast_unaligned
1479 "
1480
1481 HEADERS_LIST="
1482     AVFoundation_AVFoundation_h
1483     alsa_asoundlib_h
1484     altivec_h
1485     arpa_inet_h
1486     cdio_paranoia_h
1487     cdio_paranoia_paranoia_h
1488     dispatch_dispatch_h
1489     dev_bktr_ioctl_bt848_h
1490     dev_bktr_ioctl_meteor_h
1491     dev_ic_bt8xx_h
1492     dev_video_bktr_ioctl_bt848_h
1493     dev_video_meteor_ioctl_meteor_h
1494     direct_h
1495     dlfcn_h
1496     d3d11_h
1497     dxva_h
1498     gsm_h
1499     io_h
1500     mach_mach_time_h
1501     machine_ioctl_bt848_h
1502     machine_ioctl_meteor_h
1503     malloc_h
1504     poll_h
1505     sndio_h
1506     soundcard_h
1507     sys_mman_h
1508     sys_param_h
1509     sys_resource_h
1510     sys_select_h
1511     sys_soundcard_h
1512     sys_time_h
1513     sys_un_h
1514     sys_videoio_h
1515     unistd_h
1516     valgrind_valgrind_h
1517     windows_h
1518     winsock2_h
1519 "
1520
1521 INTRINSICS_LIST="
1522     intrinsics_neon
1523 "
1524
1525 MATH_FUNCS="
1526     atanf
1527     atan2f
1528     cbrtf
1529     cosf
1530     exp2
1531     exp2f
1532     expf
1533     isinf
1534     isnan
1535     ldexpf
1536     llrint
1537     llrintf
1538     log2
1539     log2f
1540     log10f
1541     lrint
1542     lrintf
1543     powf
1544     rint
1545     round
1546     roundf
1547     sinf
1548     trunc
1549     truncf
1550 "
1551
1552 SYSTEM_FUNCS="
1553     aligned_malloc
1554     clock_gettime
1555     closesocket
1556     CommandLineToArgvW
1557     CoTaskMemFree
1558     CryptGenRandom
1559     dlopen
1560     fcntl
1561     flt_lim
1562     fork
1563     getaddrinfo
1564     gethrtime
1565     getopt
1566     GetProcessAffinityMask
1567     GetProcessMemoryInfo
1568     GetProcessTimes
1569     getrusage
1570     GetSystemTimeAsFileTime
1571     gettimeofday
1572     gmtime_r
1573     inet_aton
1574     isatty
1575     jack_port_get_latency_range
1576     LoadLibrary
1577     localtime_r
1578     mach_absolute_time
1579     MapViewOfFile
1580     memalign
1581     mkstemp
1582     mmap
1583     mprotect
1584     nanosleep
1585     posix_memalign
1586     sched_getaffinity
1587     SetConsoleTextAttribute
1588     setmode
1589     setrlimit
1590     Sleep
1591     strerror_r
1592     sysconf
1593     sysctl
1594     usleep
1595     VirtualAlloc
1596 "
1597
1598 TOOLCHAIN_FEATURES="
1599     as_dn_directive
1600     as_fpu_directive
1601     as_func
1602     as_object_arch
1603     asm_mod_q
1604     attribute_may_alias
1605     attribute_packed
1606     ebp_available
1607     ebx_available
1608     gnu_as
1609     ibm_asm
1610     inline_asm_labels
1611     pragma_deprecated
1612     symver_asm_label
1613     symver_gnu_asm
1614     vfp_args
1615     xform_asm
1616     xmm_clobbers
1617 "
1618
1619 TYPES_LIST="
1620     CONDITION_VARIABLE_Ptr
1621     socklen_t
1622     struct_addrinfo
1623     struct_group_source_req
1624     struct_ip_mreq_source
1625     struct_ipv6_mreq
1626     struct_pollfd
1627     struct_rusage_ru_maxrss
1628     struct_sockaddr_in6
1629     struct_sockaddr_sa_len
1630     struct_sockaddr_storage
1631     struct_v4l2_frmivalenum_discrete
1632 "
1633
1634 HAVE_LIST="
1635     $ARCH_EXT_LIST
1636     $(add_suffix _external $ARCH_EXT_LIST)
1637     $(add_suffix _inline   $ARCH_EXT_LIST)
1638     $ARCH_FEATURES
1639     $ATOMICS_LIST
1640     $BUILTIN_LIST
1641     $HAVE_LIST_CMDLINE
1642     $HAVE_LIST_PUB
1643     $HEADERS_LIST
1644     $INTRINSICS_LIST
1645     $MATH_FUNCS
1646     $SYSTEM_FUNCS
1647     $THREADS_LIST
1648     $TOOLCHAIN_FEATURES
1649     $TYPES_LIST
1650     atomics_native
1651     dos_paths
1652     dxva2_lib
1653     libc_msvcrt
1654     libdc1394_1
1655     libdc1394_2
1656     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1657     sdl
1658     section_data_rel_ro
1659     threads
1660     vaapi_drm
1661     vaapi_x11
1662     vdpau_x11
1663     xlib
1664 "
1665
1666 # options emitted with CONFIG_ prefix but not available on the command line
1667 CONFIG_EXTRA="
1668     aandcttables
1669     ac3dsp
1670     audio_frame_queue
1671     audiodsp
1672     blockdsp
1673     bswapdsp
1674     cabac
1675     dirac_parse
1676     dvprofile
1677     faandct
1678     faanidct
1679     fdctdsp
1680     flacdsp
1681     fmtconvert
1682     g722dsp
1683     gcrypt
1684     gmp
1685     golomb
1686     gplv3
1687     h263dsp
1688     h264chroma
1689     h264dsp
1690     h264parse
1691     h264pred
1692     h264qpel
1693     hpeldsp
1694     huffman
1695     huffyuvdsp
1696     huffyuvencdsp
1697     idctdsp
1698     iirfilter
1699     imdct15
1700     intrax8
1701     iso_media
1702     ividsp
1703     jpegtables
1704     libx262
1705     lgplv3
1706     lpc
1707     lzf
1708     me_cmp
1709     mpeg_er
1710     mpegaudio
1711     mpegaudiodsp
1712     mpegvideo
1713     mpegvideoenc
1714     mss34dsp
1715     pixblockdsp
1716     qpeldsp
1717     qsv
1718     qsvdec
1719     qsvenc
1720     rangecoder
1721     riffdec
1722     riffenc
1723     rtpdec
1724     rtpenc_chain
1725     rv34dsp
1726     sinewin
1727     snappy
1728     srtp
1729     startcode
1730     texturedsp
1731     texturedspenc
1732     tpeldsp
1733     vaapi_encode
1734     vc1dsp
1735     videodsp
1736     vp3dsp
1737     vp56dsp
1738     vp8dsp
1739     wma_freqs
1740     wmv2dsp
1741 "
1742
1743 CMDLINE_SELECT="
1744     $ARCH_EXT_LIST
1745     $CONFIG_LIST
1746     $HAVE_LIST_CMDLINE
1747     $THREADS_LIST
1748     asm
1749     cross_compile
1750     debug
1751     extra_warnings
1752     logging
1753     lto
1754     optimizations
1755     rpath
1756 "
1757
1758 PATHS_LIST="
1759     bindir
1760     datadir
1761     docdir
1762     incdir
1763     libdir
1764     mandir
1765     prefix
1766     shlibdir
1767 "
1768
1769 CMDLINE_SET="
1770     $PATHS_LIST
1771     ar
1772     arch
1773     as
1774     build_suffix
1775     cc
1776     objcc
1777     cpu
1778     cross_prefix
1779     custom_allocator
1780     dep_cc
1781     env
1782     extra_version
1783     host_cc
1784     host_cflags
1785     host_ld
1786     host_ldflags
1787     host_libs
1788     host_os
1789     ld
1790     logfile
1791     malloc_prefix
1792     nm
1793     optflags
1794     pkg_config
1795     pkg_config_flags
1796     random_seed
1797     samples
1798     sysinclude
1799     sysroot
1800     target_exec
1801     target_os
1802     target_path
1803     target_samples
1804     toolchain
1805 "
1806
1807 CMDLINE_APPEND="
1808     extra_cflags
1809     extra_objcflags
1810     host_cppflags
1811 "
1812
1813 # code dependency declarations
1814
1815 # architecture extensions
1816
1817 armv5te_deps="arm"
1818 armv6_deps="arm"
1819 armv6t2_deps="arm"
1820 armv8_deps="aarch64"
1821 neon_deps_any="aarch64 arm"
1822 intrinsics_neon_deps="neon"
1823 vfp_deps_any="aarch64 arm"
1824 vfpv3_deps="vfp"
1825
1826 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1827
1828 altivec_deps="ppc"
1829 ppc4xx_deps="ppc"
1830 vsx_deps="altivec"
1831 power8_deps="vsx"
1832
1833 cpunop_deps="i686"
1834 x86_64_select="i686"
1835 x86_64_suggest="fast_cmov"
1836
1837 amd3dnow_deps="mmx"
1838 amd3dnowext_deps="amd3dnow"
1839 i686_deps="x86"
1840 mmx_deps="x86"
1841 mmxext_deps="mmx"
1842 sse_deps="mmxext"
1843 sse2_deps="sse"
1844 sse3_deps="sse2"
1845 ssse3_deps="sse3"
1846 sse4_deps="ssse3"
1847 sse42_deps="sse4"
1848 avx_deps="sse42"
1849 xop_deps="avx"
1850 fma3_deps="avx"
1851 fma4_deps="avx"
1852 avx2_deps="avx"
1853
1854 mmx_external_deps="yasm"
1855 mmx_inline_deps="inline_asm"
1856 mmx_suggest="mmx_external mmx_inline"
1857
1858 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1859     eval dep=\$${ext}_deps
1860     eval ${ext}_external_deps='"${dep}_external"'
1861     eval ${ext}_inline_deps='"${dep}_inline"'
1862     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1863 done
1864
1865 aligned_stack_if_any="aarch64 ppc x86"
1866 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1867 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1868 fast_unaligned_if_any="aarch64 ppc x86"
1869 simd_align_16_if_any="altivec neon sse"
1870
1871 # system capabilities
1872 symver_if_any="symver_asm_label symver_gnu_asm"
1873 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1874
1875 # threading support
1876 atomics_gcc_if="sync_val_compare_and_swap"
1877 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1878 atomics_win32_if="MemoryBarrier"
1879 atomics_native_if_any="$ATOMICS_LIST"
1880 w32threads_deps="atomics_native"
1881 threads_if_any="$THREADS_LIST"
1882
1883 # subsystems
1884 dct_select="rdft"
1885 dirac_parse_select="golomb"
1886 error_resilience_select="me_cmp"
1887 faandct_deps="faan fdctdsp"
1888 faanidct_deps="faan idctdsp"
1889 h264dsp_select="startcode"
1890 intrax8_select="blockdsp idctdsp"
1891 mdct_select="fft"
1892 rdft_select="fft"
1893 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1894 mpeg_er_select="error_resilience"
1895 mpegaudio_select="mpegaudiodsp"
1896 mpegaudiodsp_select="dct"
1897 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1898 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1899 vc1dsp_select="h264chroma qpeldsp startcode"
1900
1901 # decoders / encoders
1902 aac_decoder_select="imdct15 mdct sinewin"
1903 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1904 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1905 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1906 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1907 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1908 adpcm_g722_decoder_select="g722dsp"
1909 adpcm_g722_encoder_select="g722dsp"
1910 aic_decoder_select="golomb idctdsp"
1911 alac_encoder_select="lpc"
1912 als_decoder_select="bswapdsp"
1913 amrnb_decoder_select="lsp"
1914 amrwb_decoder_select="lsp"
1915 amv_decoder_select="sp5x_decoder"
1916 ape_decoder_select="bswapdsp"
1917 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1918 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1919 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1920 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1921 atrac1_decoder_select="mdct sinewin"
1922 atrac3_decoder_select="mdct"
1923 atrac3p_decoder_select="mdct sinewin"
1924 bink_decoder_select="blockdsp hpeldsp"
1925 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1926 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1927 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1928 cllc_decoder_select="bswapdsp"
1929 comfortnoise_encoder_select="lpc"
1930 cook_decoder_select="audiodsp mdct sinewin"
1931 cscd_decoder_select="lzo"
1932 cscd_decoder_suggest="zlib"
1933 dca_decoder_select="fmtconvert mdct"
1934 dds_decoder_select="texturedsp"
1935 dnxhd_decoder_select="blockdsp idctdsp"
1936 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1937 dvvideo_decoder_select="dvprofile idctdsp"
1938 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1939 dxa_decoder_deps="zlib"
1940 dxv_decoder_select="lzf texturedsp"
1941 eac3_decoder_select="ac3_decoder"
1942 eac3_encoder_select="ac3_encoder"
1943 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1944 eatgq_decoder_select="aandcttables idctdsp"
1945 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1946 exr_decoder_deps="zlib"
1947 ffv1_decoder_select="golomb rangecoder"
1948 ffv1_encoder_select="rangecoder"
1949 ffvhuff_decoder_select="huffyuv_decoder"
1950 ffvhuff_encoder_select="huffyuv_encoder"
1951 fic_decoder_select="golomb"
1952 flac_decoder_select="flacdsp golomb"
1953 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1954 flashsv_decoder_deps="zlib"
1955 flashsv_encoder_deps="zlib"
1956 flashsv2_decoder_deps="zlib"
1957 flv_decoder_select="h263_decoder"
1958 flv_encoder_select="h263_encoder"
1959 fourxm_decoder_select="blockdsp bswapdsp"
1960 fraps_decoder_select="bswapdsp huffman"
1961 g2m_decoder_deps="zlib"
1962 g2m_decoder_select="blockdsp idctdsp jpegtables"
1963 h261_decoder_select="mpeg_er mpegvideo"
1964 h261_encoder_select="aandcttables mpegvideoenc"
1965 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1966 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1967 h263i_decoder_select="h263_decoder"
1968 h263p_encoder_select="h263_encoder"
1969 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
1970 h264_decoder_suggest="error_resilience"
1971 hap_decoder_select="snappy texturedsp"
1972 hap_encoder_deps="libsnappy"
1973 hap_encoder_select="texturedspenc"
1974 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1975 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1976 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1977 iac_decoder_select="imc_decoder"
1978 imc_decoder_select="bswapdsp fft mdct sinewin"
1979 indeo3_decoder_select="hpeldsp"
1980 indeo4_decoder_select="ividsp"
1981 indeo5_decoder_select="ividsp"
1982 interplay_video_decoder_select="hpeldsp"
1983 jpegls_decoder_select="golomb mjpeg_decoder"
1984 jpegls_encoder_select="golomb"
1985 jv_decoder_select="blockdsp"
1986 lagarith_decoder_select="huffyuvdsp"
1987 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1988 loco_decoder_select="golomb"
1989 magicyuv_decoder_select="huffyuvdsp"
1990 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1991 metasound_decoder_select="lsp mdct sinewin"
1992 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1993 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1994 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1995 mjpegb_decoder_select="mjpeg_decoder"
1996 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
1997 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
1998 mlp_decoder_select="mlp_parser"
1999 motionpixels_decoder_select="bswapdsp"
2000 mp1_decoder_select="mpegaudio"
2001 mp1float_decoder_select="mpegaudio"
2002 mp2_decoder_select="mpegaudio"
2003 mp2float_decoder_select="mpegaudio"
2004 mp3_decoder_select="mpegaudio"
2005 mp3adu_decoder_select="mpegaudio"
2006 mp3adufloat_decoder_select="mpegaudio"
2007 mp3float_decoder_select="mpegaudio"
2008 mp3on4_decoder_select="mpegaudio"
2009 mp3on4float_decoder_select="mpegaudio"
2010 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2011 mpc8_decoder_select="mpegaudiodsp"
2012 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2013 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2014 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2015 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2016 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2017 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2018 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2019 mpeg4_encoder_select="h263_encoder"
2020 msa1_decoder_select="mss34dsp"
2021 msmpeg4v1_decoder_select="h263_decoder"
2022 msmpeg4v2_decoder_select="h263_decoder"
2023 msmpeg4v2_encoder_select="h263_encoder"
2024 msmpeg4v3_decoder_select="h263_decoder"
2025 msmpeg4v3_encoder_select="h263_encoder"
2026 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2027 mts2_decoder_select="mss34dsp"
2028 mxpeg_decoder_select="mjpeg_decoder"
2029 nellymoser_decoder_select="mdct sinewin"
2030 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2031 nuv_decoder_select="idctdsp lzo"
2032 on2avc_decoder_select="mdct"
2033 opus_decoder_deps="avresample"
2034 opus_decoder_select="imdct15"
2035 png_decoder_deps="zlib"
2036 png_encoder_deps="zlib"
2037 png_encoder_select="huffyuvencdsp"
2038 prores_decoder_select="idctdsp"
2039 prores_encoder_select="fdctdsp"
2040 qcelp_decoder_select="lsp"
2041 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2042 ra_144_encoder_select="audio_frame_queue lpc"
2043 ralf_decoder_select="golomb"
2044 rscc_decoder_deps="zlib"
2045 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2046 rv10_encoder_select="h263_encoder"
2047 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2048 rv20_encoder_select="h263_encoder"
2049 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2050 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2051 screenpresso_decoder_deps="zlib"
2052 shorten_decoder_select="golomb"
2053 sipr_decoder_select="lsp"
2054 sp5x_decoder_select="mjpeg_decoder"
2055 svq1_decoder_select="hpeldsp"
2056 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2057 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2058 svq3_decoder_suggest="zlib"
2059 tak_decoder_select="audiodsp"
2060 tdsc_decoder_deps="zlib"
2061 tdsc_decoder_select="mjpeg_decoder"
2062 theora_decoder_select="vp3_decoder"
2063 thp_decoder_select="mjpeg_decoder"
2064 tiff_decoder_suggest="zlib"
2065 tiff_encoder_suggest="zlib"
2066 truehd_decoder_select="mlp_decoder"
2067 truemotion2_decoder_select="bswapdsp"
2068 truespeech_decoder_select="bswapdsp"
2069 tscc_decoder_deps="zlib"
2070 txd_decoder_select="texturedsp"
2071 twinvq_decoder_select="mdct lsp sinewin"
2072 utvideo_decoder_select="bswapdsp"
2073 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2074 vble_decoder_select="huffyuvdsp"
2075 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2076 vc1image_decoder_select="vc1_decoder"
2077 vorbis_decoder_select="mdct"
2078 vorbis_encoder_select="mdct"
2079 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2080 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2081 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2082 vp6a_decoder_select="vp6_decoder"
2083 vp6f_decoder_select="vp6_decoder"
2084 vp7_decoder_select="h264pred videodsp vp8dsp"
2085 vp8_decoder_select="h264pred videodsp vp8dsp"
2086 vp9_decoder_select="videodsp"
2087 webp_decoder_select="vp8_decoder"
2088 wmapro_decoder_select="mdct sinewin wma_freqs"
2089 wmav1_decoder_select="mdct sinewin wma_freqs"
2090 wmav1_encoder_select="mdct sinewin wma_freqs"
2091 wmav2_decoder_select="mdct sinewin wma_freqs"
2092 wmav2_encoder_select="mdct sinewin wma_freqs"
2093 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2094 wmv1_decoder_select="h263_decoder"
2095 wmv1_encoder_select="h263_encoder"
2096 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2097 wmv2_encoder_select="h263_encoder wmv2dsp"
2098 wmv3_decoder_select="vc1_decoder"
2099 wmv3image_decoder_select="wmv3_decoder"
2100 zerocodec_decoder_deps="zlib"
2101 zlib_decoder_deps="zlib"
2102 zlib_encoder_deps="zlib"
2103 zmbv_decoder_deps="zlib"
2104 zmbv_encoder_deps="zlib"
2105
2106 # hardware accelerators
2107 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2108 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2109 vaapi_deps="va_va_h"
2110 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2111 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2112 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2113
2114 h263_vaapi_hwaccel_deps="vaapi"
2115 h263_vaapi_hwaccel_select="h263_decoder"
2116 h264_d3d11va_hwaccel_deps="d3d11va"
2117 h264_d3d11va_hwaccel_select="h264_decoder"
2118 h264_dxva2_hwaccel_deps="dxva2"
2119 h264_dxva2_hwaccel_select="h264_decoder"
2120 h264_mmal_decoder_deps="mmal"
2121 h264_mmal_decoder_select="mmal"
2122 h264_mmal_hwaccel_deps="mmal"
2123 h264_omx_encoder_deps="omx"
2124 h264_qsv_hwaccel_deps="libmfx"
2125 h264_vaapi_hwaccel_deps="vaapi"
2126 h264_vaapi_hwaccel_select="h264_decoder"
2127 h264_vda_hwaccel_deps="vda"
2128 h264_vda_hwaccel_select="h264_decoder"
2129 h264_vda_old_hwaccel_deps="vda"
2130 h264_vda_old_hwaccel_select="h264_decoder"
2131 h264_vdpau_hwaccel_deps="vdpau"
2132 h264_vdpau_hwaccel_select="h264_decoder"
2133 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2134 hevc_d3d11va_hwaccel_select="hevc_decoder"
2135 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2136 hevc_dxva2_hwaccel_select="hevc_decoder"
2137 hevc_qsv_hwaccel_deps="libmfx"
2138 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2139 hevc_vdpau_hwaccel_select="hevc_decoder"
2140 mpeg1_vdpau_hwaccel_deps="vdpau"
2141 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2142 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2143 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2144 mpeg2_dxva2_hwaccel_deps="dxva2"
2145 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2146 mpeg2_mmal_decoder_deps="mmal"
2147 mpeg2_mmal_decoder_select="mmal"
2148 mpeg2_mmal_hwaccel_deps="mmal"
2149 mpeg2_qsv_hwaccel_deps="libmfx"
2150 mpeg2_vaapi_hwaccel_deps="vaapi"
2151 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2152 mpeg2_vdpau_hwaccel_deps="vdpau"
2153 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2154 mpeg4_omx_encoder_deps="omx"
2155 mpeg4_vaapi_hwaccel_deps="vaapi"
2156 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2157 mpeg4_vdpau_hwaccel_deps="vdpau"
2158 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2159 vc1_d3d11va_hwaccel_deps="d3d11va"
2160 vc1_d3d11va_hwaccel_select="vc1_decoder"
2161 vc1_dxva2_hwaccel_deps="dxva2"
2162 vc1_dxva2_hwaccel_select="vc1_decoder"
2163 vc1_mmal_decoder_deps="mmal"
2164 vc1_mmal_decoder_select="mmal"
2165 vc1_mmal_hwaccel_deps="mmal"
2166 vc1_vaapi_hwaccel_deps="vaapi"
2167 vc1_vaapi_hwaccel_select="vc1_decoder"
2168 vc1_vdpau_hwaccel_deps="vdpau"
2169 vc1_vdpau_hwaccel_select="vc1_decoder"
2170 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2171 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2172 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2173 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2174
2175 # hardware-accelerated codecs
2176 nvenc_deps_any="dlopen LoadLibrary"
2177 nvenc_extralibs='$ldl'
2178 omx_deps="dlopen pthreads"
2179 omx_extralibs='$ldl'
2180 qsvdec_select="qsv"
2181 qsvenc_select="qsv"
2182 vaapi_encode_deps="vaapi"
2183
2184 hwupload_cuda_filter_deps="cuda"
2185 scale_npp_filter_deps="cuda libnpp"
2186
2187 h264_nvenc_encoder_deps="nvenc"
2188 h264_qsv_decoder_deps="libmfx"
2189 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2190 h264_qsv_encoder_deps="libmfx"
2191 h264_qsv_encoder_select="qsvenc"
2192 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2193 h264_vaapi_encoder_select="vaapi_encode golomb"
2194
2195 hevc_nvenc_encoder_deps="nvenc"
2196 hevc_qsv_decoder_deps="libmfx"
2197 hevc_qsv_encoder_deps="libmfx"
2198 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2199 hevc_qsv_encoder_select="qsvenc"
2200 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2201 hevc_vaapi_encoder_select="vaapi_encode golomb"
2202 mpeg2_qsv_decoder_deps="libmfx"
2203 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2204 mpeg2_qsv_encoder_deps="libmfx"
2205 mpeg2_qsv_encoder_select="qsvenc"
2206
2207 nvenc_h264_encoder_deps="nvenc"
2208 nvenc_hevc_encoder_deps="nvenc"
2209
2210 # parsers
2211 h264_parser_select="golomb h264dsp h264parse"
2212 hevc_parser_select="golomb"
2213 mpegvideo_parser_select="mpegvideo"
2214 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2215 vc1_parser_select="vc1dsp"
2216
2217 # bitstream_filters
2218 mjpeg2jpeg_bsf_select="jpegtables"
2219
2220 # external libraries
2221 libdcadec_decoder_deps="libdcadec"
2222 libfaac_encoder_deps="libfaac"
2223 libfaac_encoder_select="audio_frame_queue"
2224 libfdk_aac_decoder_deps="libfdk_aac"
2225 libfdk_aac_encoder_deps="libfdk_aac"
2226 libfdk_aac_encoder_select="audio_frame_queue"
2227 libgsm_decoder_deps="libgsm"
2228 libgsm_encoder_deps="libgsm"
2229 libgsm_ms_decoder_deps="libgsm"
2230 libgsm_ms_encoder_deps="libgsm"
2231 libilbc_decoder_deps="libilbc"
2232 libilbc_encoder_deps="libilbc"
2233 libkvazaar_encoder_deps="libkvazaar"
2234 libmp3lame_encoder_deps="libmp3lame"
2235 libmp3lame_encoder_select="audio_frame_queue"
2236 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2237 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2238 libopencore_amrnb_encoder_select="audio_frame_queue"
2239 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2240 libopenh264_decoder_deps="libopenh264"
2241 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2242 libopenh264_encoder_deps="libopenh264"
2243 libopenjpeg_decoder_deps="libopenjpeg"
2244 libopenjpeg_encoder_deps="libopenjpeg"
2245 libopus_decoder_deps="libopus"
2246 libopus_encoder_deps="libopus"
2247 libopus_encoder_select="audio_frame_queue"
2248 libschroedinger_decoder_deps="libschroedinger"
2249 libschroedinger_encoder_deps="libschroedinger"
2250 libspeex_decoder_deps="libspeex"
2251 libspeex_encoder_deps="libspeex"
2252 libspeex_encoder_select="audio_frame_queue"
2253 libtheora_encoder_deps="libtheora"
2254 libtwolame_encoder_deps="libtwolame"
2255 libvo_aacenc_encoder_deps="libvo_aacenc"
2256 libvo_aacenc_encoder_select="audio_frame_queue"
2257 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2258 libvorbis_encoder_deps="libvorbis"
2259 libvorbis_encoder_select="audio_frame_queue"
2260 libvpx_vp8_decoder_deps="libvpx"
2261 libvpx_vp8_encoder_deps="libvpx"
2262 libvpx_vp9_decoder_deps="libvpx"
2263 libvpx_vp9_encoder_deps="libvpx"
2264 libwavpack_encoder_deps="libwavpack"
2265 libwebp_encoder_deps="libwebp"
2266 libx262_encoder_deps="libx262"
2267 libx264_encoder_deps="libx264"
2268 libx265_encoder_deps="libx265"
2269 libxavs_encoder_deps="libxavs"
2270 libxvid_encoder_deps="libxvid"
2271
2272 # demuxers / muxers
2273 ac3_demuxer_select="ac3_parser"
2274 asf_demuxer_select="riffdec"
2275 asf_muxer_select="riffenc"
2276 asf_stream_muxer_select="asf_muxer"
2277 avi_demuxer_select="iso_media riffdec"
2278 avi_muxer_select="riffenc"
2279 avisynth_demuxer_deps="avisynth"
2280 avisynth_demuxer_select="riffdec"
2281 caf_demuxer_select="iso_media riffdec"
2282 dash_muxer_select="mp4_muxer"
2283 dirac_demuxer_select="dirac_parser"
2284 dv_demuxer_select="dvprofile"
2285 dv_muxer_select="dvprofile"
2286 dxa_demuxer_select="riffdec"
2287 eac3_demuxer_select="ac3_parser"
2288 f4v_muxer_select="mov_muxer"
2289 flac_demuxer_select="flac_parser"
2290 hds_muxer_select="flv_muxer"
2291 hls_muxer_select="mpegts_muxer"
2292 ipod_muxer_select="mov_muxer"
2293 ismv_muxer_select="mov_muxer"
2294 matroska_audio_muxer_select="matroska_muxer"
2295 matroska_demuxer_select="iso_media riffdec"
2296 matroska_demuxer_suggest="bzlib lzo zlib"
2297 matroska_muxer_select="iso_media riffenc"
2298 mmf_muxer_select="riffenc"
2299 mov_demuxer_select="iso_media riffdec"
2300 mov_demuxer_suggest="zlib"
2301 mov_muxer_select="iso_media riffenc rtpenc_chain"
2302 mp3_demuxer_select="mpegaudio_parser"
2303 mp4_muxer_select="mov_muxer"
2304 mpegts_demuxer_select="iso_media"
2305 mpegts_muxer_select="adts_muxer latm_muxer"
2306 mpegtsraw_demuxer_select="mpegts_demuxer"
2307 mxf_d10_muxer_select="mxf_muxer"
2308 nut_muxer_select="riffenc"
2309 nuv_demuxer_select="riffdec"
2310 oga_muxer_select="ogg_muxer"
2311 ogg_demuxer_select="dirac_parse"
2312 opus_muxer_select="ogg_muxer"
2313 psp_muxer_select="mov_muxer"
2314 rtp_demuxer_select="sdp_demuxer"
2315 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2316 rtsp_demuxer_select="http_protocol rtpdec"
2317 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2318 sap_demuxer_select="sdp_demuxer"
2319 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2320 sdp_demuxer_select="rtpdec"
2321 smoothstreaming_muxer_select="ismv_muxer"
2322 spdif_muxer_select="aac_parser"
2323 spx_muxer_select="ogg_muxer"
2324 swf_demuxer_suggest="zlib"
2325 tak_demuxer_select="tak_parser"
2326 tg2_muxer_select="mov_muxer"
2327 tgp_muxer_select="mov_muxer"
2328 w64_demuxer_select="wav_demuxer"
2329 wav_demuxer_select="riffdec"
2330 wav_muxer_select="riffenc"
2331 webm_muxer_select="iso_media riffenc"
2332 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2333 wtv_demuxer_select="mpegts_demuxer riffdec"
2334 xmv_demuxer_select="riffdec"
2335 xwma_demuxer_select="riffdec"
2336
2337 # indevs / outdevs
2338 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2339 alsa_outdev_deps="alsa_asoundlib_h"
2340 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2341 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2342 dv1394_indev_deps="dv1394"
2343 dv1394_indev_select="dv_demuxer"
2344 fbdev_indev_deps="linux_fb_h"
2345 jack_indev_deps="jack_jack_h"
2346 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2347 libcdio_indev_deps="libcdio"
2348 libdc1394_indev_deps="libdc1394"
2349 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2350 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2351 pulse_indev_deps="libpulse"
2352 sndio_indev_deps="sndio_h"
2353 sndio_outdev_deps="sndio_h"
2354 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2355 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2356 vfwcap_indev_extralibs="-lavicap32"
2357 x11grab_indev_deps="x11grab"
2358 x11grab_xcb_indev_deps="libxcb"
2359
2360 # protocols
2361 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2362 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2363 ffrtmpcrypt_protocol_select="tcp_protocol"
2364 ffrtmphttp_protocol_deps="!librtmp_protocol"
2365 ffrtmphttp_protocol_select="http_protocol"
2366 gopher_protocol_select="network"
2367 http_protocol_select="tcp_protocol"
2368 httpproxy_protocol_select="tcp_protocol"
2369 https_protocol_select="tls_protocol"
2370 icecast_protocol_select="http_protocol"
2371 librtmp_protocol_deps="librtmp"
2372 librtmpe_protocol_deps="librtmp"
2373 librtmps_protocol_deps="librtmp"
2374 librtmpt_protocol_deps="librtmp"
2375 librtmpte_protocol_deps="librtmp"
2376 mmsh_protocol_select="http_protocol"
2377 mmst_protocol_select="network"
2378 rtmp_protocol_deps="!librtmp_protocol"
2379 rtmp_protocol_select="tcp_protocol"
2380 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2381 rtmps_protocol_deps="!librtmp_protocol"
2382 rtmps_protocol_select="tls_protocol"
2383 rtmpt_protocol_select="ffrtmphttp_protocol"
2384 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2385 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2386 rtp_protocol_select="udp_protocol"
2387 sctp_protocol_deps="struct_sctp_event_subscribe"
2388 sctp_protocol_select="network"
2389 srtp_protocol_select="rtp_protocol srtp"
2390 tcp_protocol_select="network"
2391 tls_gnutls_protocol_deps="gnutls"
2392 tls_gnutls_protocol_select="tcp_protocol"
2393 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2394 tls_openssl_protocol_select="tcp_protocol"
2395 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2396 udp_protocol_select="network"
2397 unix_protocol_deps="sys_un_h"
2398 unix_protocol_select="network"
2399
2400 # filters
2401 blackframe_filter_deps="gpl"
2402 boxblur_filter_deps="gpl"
2403 bs2b_filter_deps="libbs2b"
2404 cropdetect_filter_deps="gpl"
2405 delogo_filter_deps="gpl"
2406 drawtext_filter_deps="libfreetype"
2407 frei0r_filter_deps="frei0r dlopen"
2408 frei0r_filter_extralibs='$ldl'
2409 frei0r_src_filter_deps="frei0r dlopen"
2410 frei0r_src_filter_extralibs='$ldl'
2411 hqdn3d_filter_deps="gpl"
2412 interlace_filter_deps="gpl"
2413 ocv_filter_deps="libopencv"
2414 resample_filter_deps="avresample"
2415 scale_filter_deps="swscale"
2416 scale_qsv_filter_deps="libmfx"
2417 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2418
2419 # examples
2420 avcodec_example_deps="avcodec avutil"
2421 filter_audio_example_deps="avfilter avutil"
2422 metadata_example_deps="avformat avutil"
2423 output_example_deps="avcodec avformat avutil swscale"
2424 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2425 transcode_aac_example_deps="avcodec avformat avresample"
2426
2427 # libraries, in linking order
2428 avcodec_deps="avutil"
2429 avdevice_deps="avformat avcodec avutil"
2430 avfilter_deps="avutil"
2431 avformat_deps="avcodec avutil"
2432 avresample_deps="avutil"
2433 swscale_deps="avutil"
2434
2435 # programs
2436 avconv_deps="avcodec avfilter avformat avresample swscale"
2437 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2438                fps_filter null_filter resample_filter scale_filter
2439                setpts_filter trim_filter"
2440 avplay_deps="avcodec avfilter avformat avresample sdl"
2441 avplay_libs='$sdl_libs'
2442 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2443 avprobe_deps="avcodec avformat"
2444
2445 # documentation
2446 pod2man_deps="doc"
2447 texi2html_deps="doc"
2448
2449 # default parameters
2450
2451 logfile="config.log"
2452
2453 # installation paths
2454 prefix_default="/usr/local"
2455 bindir_default='${prefix}/bin'
2456 datadir_default='${prefix}/share/avconv'
2457 docdir_default='${prefix}/share/doc/libav'
2458 incdir_default='${prefix}/include'
2459 libdir_default='${prefix}/lib'
2460 mandir_default='${prefix}/share/man'
2461 shlibdir_default="$libdir_default"
2462
2463 # toolchain
2464 ar_default="ar"
2465 cc_default="gcc"
2466 host_cc_default="gcc"
2467 cp_f="cp -f"
2468 ln_s="ln -s -f"
2469 nm_default="nm -g"
2470 objformat="elf"
2471 pkg_config_default=pkg-config
2472 ranlib="ranlib"
2473 strip="strip"
2474 version_script='--version-script'
2475 yasmexe="yasm"
2476
2477 # machine
2478 arch_default=$(uname -m)
2479 cpu="generic"
2480 intrinsics="none"
2481
2482 # OS
2483 target_os_default=$(tolower $(uname -s))
2484 host_os=$target_os_default
2485
2486 # configurable options
2487 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2488
2489 enable asm
2490 enable debug
2491 enable doc
2492 enable faan faandct faanidct
2493 enable optimizations
2494 enable safe_bitstream_reader
2495 enable static
2496 enable swscale_alpha
2497 enable valgrind_backtrace
2498
2499 # By default, enable only those hwaccels that have no external dependencies.
2500 enable d3d11va dxva2 vda vdpau
2501
2502 # build settings
2503 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2504 LIBPREF="lib"
2505 LIBSUF=".a"
2506 FULLNAME='$(NAME)$(BUILDSUF)'
2507 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2508 SLIBPREF="lib"
2509 SLIBSUF=".so"
2510 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2511 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2512 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2513 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2514 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2515 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2516 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2517
2518 asflags_filter=echo
2519 cflags_filter=echo
2520 ldflags_filter=echo
2521
2522 AS_C='-c'
2523 AS_O='-o $@'
2524 CC_C='-c'
2525 CC_E='-E -o $@'
2526 CC_O='-o $@'
2527 OBJCC_C='-c'
2528 OBJCC_E='-E -o $@'
2529 OBJCC_O='-o $@'
2530 LD_O='-o $@'
2531 LD_LIB='-l%'
2532 LD_PATH='-L'
2533 HOSTCC_C='-c'
2534 HOSTCC_E='-E -o $@'
2535 HOSTCC_O='-o $@'
2536 HOSTLD_O='-o $@'
2537
2538 host_libs='-lm'
2539 host_cflags_filter=echo
2540 host_ldflags_filter=echo
2541
2542 target_path='$(CURDIR)'
2543
2544 # since the object filename is not given with the -MM flag, the compiler
2545 # is only able to print the basename, and we must add the path ourselves
2546 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2547 DEPFLAGS='-MM'
2548
2549 # find source path
2550 if test -f configure; then
2551     source_path=.
2552 else
2553     source_path=$(cd $(dirname "$0"); pwd)
2554     echo "$source_path" | grep -q '[[:blank:]]' &&
2555         die "Out of tree builds are impossible with whitespace in source path."
2556     test -e "$source_path/config.h" &&
2557         die "Out of tree builds are impossible with config.h in source dir."
2558 fi
2559
2560 for v in "$@"; do
2561     r=${v#*=}
2562     l=${v%"$r"}
2563     r=$(sh_quote "$r")
2564     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2565 done
2566
2567 find_things(){
2568     thing=$1
2569     pattern=$2
2570     file=$source_path/$3
2571     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2572 }
2573
2574 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2575 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2576 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2577 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2578 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2579 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2580 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2581 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2582 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2583
2584 find_things_extern(){
2585     thing=$1
2586     pattern=$2
2587     file=$source_path/$3
2588     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2589 }
2590
2591 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2592 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2593
2594 ALL_COMPONENTS="
2595     $BSF_LIST
2596     $DECODER_LIST
2597     $DEMUXER_LIST
2598     $ENCODER_LIST
2599     $FILTER_LIST
2600     $HWACCEL_LIST
2601     $INDEV_LIST
2602     $MUXER_LIST
2603     $OUTDEV_LIST
2604     $PARSER_LIST
2605     $PROTOCOL_LIST
2606 "
2607
2608 for n in $COMPONENT_LIST; do
2609     v=$(toupper ${n%s})_LIST
2610     eval enable \$$v
2611     eval ${n}_if_any="\$$v"
2612 done
2613
2614 enable $ARCH_EXT_LIST
2615
2616 die_unknown(){
2617     echo "Unknown option \"$1\"."
2618     echo "See $0 --help for available options."
2619     exit 1
2620 }
2621
2622 print_3_columns() {
2623     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2624 }
2625
2626 show_list() {
2627     suffix=_$1
2628     shift
2629     echo $* | sed s/$suffix//g | print_3_columns
2630     exit 0
2631 }
2632
2633 rand_list(){
2634     IFS=', '
2635     set -- $*
2636     unset IFS
2637     for thing; do
2638         comp=${thing%:*}
2639         prob=${thing#$comp}
2640         prob=${prob#:}
2641         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2642         echo "prob ${prob:-0.5}"
2643         printf '%s\n' $comp
2644     done
2645 }
2646
2647 do_random(){
2648     action=$1
2649     shift
2650     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2651     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2652 }
2653
2654 for opt do
2655     optval="${opt#*=}"
2656     case "$opt" in
2657         --extra-ldflags=*)
2658             add_ldflags $optval
2659         ;;
2660         --extra-ldexeflags=*)
2661             add_ldexeflags $optval
2662         ;;
2663         --extra-libs=*)
2664             add_extralibs $optval
2665         ;;
2666         --disable-devices)
2667             disable $INDEV_LIST $OUTDEV_LIST
2668         ;;
2669         --enable-debug=*)
2670             debuglevel="$optval"
2671         ;;
2672         --disable-programs)
2673             disable $PROGRAM_LIST
2674         ;;
2675         --disable-everything)
2676             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2677         ;;
2678         --disable-all)
2679             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2680             disable $LIBRARY_LIST $PROGRAM_LIST doc
2681         ;;
2682         --enable-random|--disable-random)
2683             action=${opt%%-random}
2684             do_random ${action#--} $COMPONENT_LIST
2685         ;;
2686         --enable-random=*|--disable-random=*)
2687             action=${opt%%-random=*}
2688             do_random ${action#--} $optval
2689         ;;
2690         --enable-*=*|--disable-*=*)
2691             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2692             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2693             eval list=\$$(toupper $thing)_LIST
2694             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2695             $action $(filter "$name" $list)
2696         ;;
2697         --enable-avserver|--disable-avserver*)
2698             warn "avserver has been removed, the ${opt} option is only"\
2699                  "provided for compatibility and will be removed in the future"
2700         ;;
2701         --enable-?*|--disable-?*)
2702             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2703             if is_in $option $COMPONENT_LIST; then
2704                 test $action = disable && action=unset
2705                 eval $action \$$(toupper ${option%s})_LIST
2706             elif is_in $option $CMDLINE_SELECT; then
2707                 $action $option
2708             else
2709                 die_unknown $opt
2710             fi
2711         ;;
2712         --list-*)
2713             NAME="${opt#--list-}"
2714             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2715             NAME=${NAME%s}
2716             eval show_list $NAME \$$(toupper $NAME)_LIST
2717         ;;
2718         --help|-h) show_help
2719         ;;
2720         *)
2721             optname="${opt%%=*}"
2722             optname="${optname#--}"
2723             optname=$(echo "$optname" | sed 's/-/_/g')
2724             if is_in $optname $CMDLINE_SET; then
2725                 eval $optname='$optval'
2726             elif is_in $optname $CMDLINE_APPEND; then
2727                 append $optname "$optval"
2728             else
2729                 die_unknown $opt
2730             fi
2731         ;;
2732     esac
2733 done
2734
2735 for e in $env; do
2736     eval "export $e"
2737 done
2738
2739 disabled logging && logfile=/dev/null
2740
2741 # Disable all the library-specific components if the library itself
2742 # is disabled, see AVCODEC_LIST and following _LIST variables.
2743
2744 disable_components(){
2745     disabled ${1} && disable $(
2746         eval components="\$$(toupper ${1})_COMPONENTS"
2747         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2748     )
2749 }
2750
2751 map 'disable_components $v' $LIBRARY_LIST
2752
2753 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2754 set >> $logfile
2755
2756 case "$toolchain" in
2757     *-asan)
2758         cc_default="${toolchain%-asan}"
2759         add_cflags  -fsanitize=address
2760         add_ldflags -fsanitize=address
2761     ;;
2762     *-msan)
2763         cc_default="${toolchain%-msan}"
2764         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2765         add_ldflags -fsanitize=memory
2766     ;;
2767     *-tsan)
2768         cc_default="${toolchain%-tsan}"
2769         add_cflags  -fsanitize=thread -pie
2770         add_ldflags -fsanitize=thread -pie
2771         case "$toolchain" in
2772             gcc-tsan)
2773                 add_cflags  -fPIC
2774                 add_ldflags -fPIC
2775                 ;;
2776         esac
2777     ;;
2778     *-usan)
2779         cc_default="${toolchain%-usan}"
2780         add_cflags  -fsanitize=undefined
2781         add_ldflags -fsanitize=undefined
2782         case "$toolchain" in
2783             clang-usan)
2784                 add_cflags -O1
2785                 ;;
2786         esac
2787     ;;
2788     valgrind-*)
2789         target_exec_default="valgrind"
2790         case "$toolchain" in
2791             valgrind-massif)
2792                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2793                 ;;
2794             valgrind-memcheck)
2795                 target_exec_args="--track-origins=yes --leak-check=full"
2796                 ;;
2797         esac
2798     ;;
2799     msvc)
2800         # Check whether the current MSVC version needs the C99 converter.
2801         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2802         # support enough of C99 to build libav. Default to the new
2803         # behaviour if the regexp was unable to match anything, since this
2804         # successfully parses the version number of existing supported
2805         # versions that require the converter (MSVC 2010 and 2012).
2806         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2807         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2808             cc_default="cl"
2809         else
2810             cc_default="c99wrap cl"
2811         fi
2812         ld_default="$source_path/compat/windows/mslink"
2813         nm_default="dumpbin -symbols"
2814         ar_default="lib"
2815         case "$arch" in
2816         arm*)
2817             as_default="armasm"
2818             ;;
2819         esac
2820         target_os_default="win32"
2821         # Use a relative path for TMPDIR. This makes sure all the
2822         # ffconf temp files are written with a relative path, avoiding
2823         # issues with msys/win32 path conversion for MSVC parameters
2824         # such as -Fo<file> or -out:<file>.
2825         TMPDIR=.
2826     ;;
2827     icl)
2828         cc_default="icl"
2829         ld_default="xilink"
2830         nm_default="dumpbin -symbols"
2831         ar_default="xilib"
2832         target_os_default="win32"
2833         TMPDIR=.
2834     ;;
2835     gcov)
2836         add_cflags  -fprofile-arcs -ftest-coverage
2837         add_ldflags -fprofile-arcs -ftest-coverage
2838     ;;
2839     llvm-cov)
2840         add_cflags -fprofile-arcs -ftest-coverage
2841         add_ldflags --coverage
2842     ;;
2843     hardened)
2844         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2845         add_cflags   -fno-strict-overflow -fstack-protector-all
2846         add_ldflags  -Wl,-z,relro -Wl,-z,now
2847     ;;
2848     ?*)
2849         die "Unknown toolchain $toolchain"
2850     ;;
2851 esac
2852
2853 test -n "$cross_prefix" && enable cross_compile
2854
2855 if enabled cross_compile; then
2856     test -n "$arch" && test -n "$target_os" ||
2857         die "Must specify target arch and OS when cross-compiling"
2858 fi
2859
2860 ar_default="${cross_prefix}${ar_default}"
2861 cc_default="${cross_prefix}${cc_default}"
2862 occ_default="${cross_prefix}${occ_default}"
2863 nm_default="${cross_prefix}${nm_default}"
2864 pkg_config_default="${cross_prefix}${pkg_config_default}"
2865 ranlib="${cross_prefix}${ranlib}"
2866 strip="${cross_prefix}${strip}"
2867
2868 sysinclude_default="${sysroot}/usr/include"
2869
2870 set_default arch cc pkg_config sysinclude target_exec target_os
2871 enabled cross_compile || host_cc_default=$cc
2872 set_default host_cc
2873
2874 if ! $pkg_config --version >/dev/null 2>&1; then
2875     warn "$pkg_config not found, library detection may fail."
2876     pkg_config=false
2877 fi
2878
2879 exesuf() {
2880     case $1 in
2881         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2882     esac
2883 }
2884
2885 EXESUF=$(exesuf $target_os)
2886 HOSTEXESUF=$(exesuf $host_os)
2887
2888 # set temporary file name
2889 : ${TMPDIR:=$TEMPDIR}
2890 : ${TMPDIR:=$TMP}
2891 : ${TMPDIR:=/tmp}
2892
2893 if ! check_cmd mktemp -u XXXXXX; then
2894     # simple replacement for missing mktemp
2895     # NOT SAFE FOR GENERAL USE
2896     mktemp(){
2897         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2898     }
2899 fi
2900
2901 tmpfile(){
2902     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2903         (set -C; exec > $tmp) 2>/dev/null ||
2904         die "Unable to create temporary file in $TMPDIR."
2905     append TMPFILES $tmp
2906     eval $1=$tmp
2907 }
2908
2909 trap 'rm -f -- $TMPFILES' EXIT
2910
2911 tmpfile TMPASM .asm
2912 tmpfile TMPC   .c
2913 tmpfile TMPE   $EXESUF
2914 tmpfile TMPH   .h
2915 tmpfile TMPO   .o
2916 tmpfile TMPS   .S
2917 tmpfile TMPSH  .sh
2918 tmpfile TMPV   .ver
2919
2920 unset -f mktemp
2921
2922 chmod +x $TMPE
2923
2924 # make sure we can execute files in $TMPDIR
2925 cat > $TMPSH 2>> $logfile <<EOF
2926 #! /bin/sh
2927 EOF
2928 chmod +x $TMPSH >> $logfile 2>&1
2929 if ! $TMPSH >> $logfile 2>&1; then
2930     cat <<EOF
2931 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2932 variable to another directory and make sure that it is not mounted noexec.
2933 EOF
2934     die "Sanity test failed."
2935 fi
2936
2937 armasm_flags(){
2938     for flag; do
2939         case $flag in
2940             # Filter out MSVC cl.exe options from cflags that shouldn't
2941             # be passed to gas-preprocessor
2942             -M[TD]*)                                            ;;
2943             *)                  echo $flag                      ;;
2944         esac
2945    done
2946 }
2947
2948 ccc_flags(){
2949     for flag; do
2950         case $flag in
2951             -std=c99)           echo -c99                       ;;
2952             -mcpu=*)            echo -arch ${flag#*=}           ;;
2953             -mieee)             echo -ieee                      ;;
2954             -O*|-fast)          echo $flag                      ;;
2955             -fno-math-errno)    echo -assume nomath_errno       ;;
2956             -g)                 echo -g3                        ;;
2957             -Wall)              echo -msg_enable level2         ;;
2958             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2959             -Wl,*)              echo $flag                      ;;
2960             -f*|-W*)                                            ;;
2961             *)                  echo $flag                      ;;
2962         esac
2963    done
2964 }
2965
2966 cparser_flags(){
2967     for flag; do
2968         case $flag in
2969             -Wno-switch)             echo -Wno-switch-enum ;;
2970             -Wno-format-zero-length) ;;
2971             -Wdisabled-optimization) ;;
2972             -Wno-pointer-sign)       echo -Wno-other ;;
2973             *)                       echo $flag ;;
2974         esac
2975     done
2976 }
2977
2978 msvc_common_flags(){
2979     for flag; do
2980         case $flag in
2981             # In addition to specifying certain flags under the compiler
2982             # specific filters, they must be specified here as well or else the
2983             # generic catch all at the bottom will print the original flag.
2984             -Wall)                ;;
2985             -std=c99)             ;;
2986             # Common flags
2987             -fomit-frame-pointer) ;;
2988             -g)                   echo -Z7 ;;
2989             -fno-math-errno)      ;;
2990             -fno-common)          ;;
2991             -fno-signed-zeros)    ;;
2992             -fPIC)                ;;
2993             -mthumb)              ;;
2994             -march=*)             ;;
2995             -lz)                  echo zlib.lib ;;
2996             -lavifil32)           echo vfw32.lib ;;
2997             -lavicap32)           echo vfw32.lib user32.lib ;;
2998             -lx264)               echo libx264.lib ;;
2999             -l*)                  echo ${flag#-l}.lib ;;
3000             -L*)                  echo -libpath:${flag#-L} ;;
3001             *)                    echo $flag ;;
3002         esac
3003     done
3004 }
3005
3006 msvc_flags(){
3007     msvc_common_flags "$@"
3008     for flag; do
3009         case $flag in
3010             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3011                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3012                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3013                                        -wd4273 -wd4554 -wd4701 ;;
3014         esac
3015     done
3016 }
3017
3018 icl_flags(){
3019     msvc_common_flags "$@"
3020     for flag; do
3021         case $flag in
3022             # Despite what Intel's documentation says -Wall, which is supported
3023             # on Windows, does enable remarks so disable them here.
3024             -Wall)                echo $flag -Qdiag-disable:remark ;;
3025             -std=c99)             echo -Qstd=c99 ;;
3026         esac
3027     done
3028 }
3029
3030 pgi_flags(){
3031     for flag; do
3032         case $flag in
3033             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3034             -fomit-frame-pointer) echo -Mnoframe ;;
3035             -g)                   echo -gopt ;;
3036             *)                    echo $flag ;;
3037         esac
3038     done
3039 }
3040
3041 suncc_flags(){
3042     for flag; do
3043         case $flag in
3044             -march=*|-mcpu=*)
3045                 case "${flag#*=}" in
3046                     native)                   echo -xtarget=native       ;;
3047                     v9|niagara)               echo -xarch=sparc          ;;
3048                     ultrasparc)               echo -xarch=sparcvis       ;;
3049                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3050                     i586|pentium)             echo -xchip=pentium        ;;
3051                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3052                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3053                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3054                     pentium4*)          echo -xtarget=pentium4           ;;
3055                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3056                     *-sse3)             echo -xarch=sse3                 ;;
3057                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3058                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3059                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3060                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3061                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3062                     k8|opteron|athlon64|athlon-fx)
3063                                                echo -xarch=sse2a         ;;
3064                     athlon*)                   echo -xarch=pentium_proa  ;;
3065                 esac
3066                 ;;
3067             -std=c99)             echo -xc99              ;;
3068             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3069             -fPIC)                echo -KPIC -xcode=pic32 ;;
3070             -W*,*)                echo $flag              ;;
3071             -f*-*|-W*|-mimpure-text)                      ;;
3072             -shared)              echo -G                 ;;
3073             *)                    echo $flag              ;;
3074         esac
3075     done
3076 }
3077
3078 tms470_flags(){
3079     for flag; do
3080         case $flag in
3081             -march=*|-mcpu=*)
3082                 case "${flag#*=}" in
3083                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3084                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3085                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3086                     armv6*|arm11*)          echo -mv=6   ;;
3087                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3088                                             echo -mv=5e  ;;
3089                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3090                 esac
3091                 ;;
3092             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3093             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3094             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3095             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3096             -msoft-float)   echo --float_support=vfplib       ;;
3097             -O[0-3]|-mf=*)  echo $flag                        ;;
3098             -g)             echo -g -mn                       ;;
3099             -pds=*)         echo $flag                        ;;
3100             -D*|-I*)        echo $flag                        ;;
3101             --gcc|--abi=*)  echo $flag                        ;;
3102             -me)            echo $flag                        ;;
3103         esac
3104     done
3105 }
3106
3107 probe_cc(){
3108     pfx=$1
3109     _cc=$2
3110
3111     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3112     unset _ld_o _ldflags _ld_lib _ld_path
3113     unset _depflags _DEPCMD _DEPFLAGS
3114     _flags_filter=echo
3115
3116     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3117         _type=llvm_gcc
3118         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3119         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3120         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3121         _cflags_speed='-O3'
3122         _cflags_size='-Os'
3123     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3124         _type=gcc
3125         gcc_version=$($_cc --version | head -n1)
3126         gcc_basever=$($_cc -dumpversion)
3127         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3128         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3129         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3130         if ! $_cc -dumpversion | grep -q '^2\.'; then
3131             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3132         fi
3133         _cflags_speed='-O3'
3134         _cflags_size='-Os'
3135     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3136         _type=icc
3137         _ident=$($_cc --version | head -n1)
3138         _depflags='-MMD'
3139         _cflags_speed='-O3'
3140         _cflags_size='-Os'
3141         _cflags_noopt='-O1'
3142     elif $_cc -v 2>&1 | grep -q xlc; then
3143         _type=xlc
3144         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3145         _cflags_speed='-O5'
3146         _cflags_size='-O5 -qcompact'
3147     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3148         _type=ccc
3149         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3150         _DEPFLAGS='-M'
3151         _cflags_speed='-fast'
3152         _cflags_size='-O1'
3153         _flags_filter=ccc_flags
3154     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3155         test -d "$sysroot" || die "No valid sysroot specified."
3156         _type=armcc
3157         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3158         armcc_conf="$PWD/armcc.conf"
3159         $_cc --arm_linux_configure                 \
3160              --arm_linux_config_file="$armcc_conf" \
3161              --configure_sysroot="$sysroot"        \
3162              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3163              die "Error creating armcc configuration file."
3164         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3165         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3166         as_default="${cross_prefix}gcc"
3167         _depflags='-MMD'
3168         _cflags_speed='-O3'
3169         _cflags_size='-Os'
3170     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3171         _type=tms470
3172         _ident=$($_cc -version | head -n1 | tr -s ' ')
3173         _flags='--gcc --abi=eabi -me'
3174         _cc_e='-ppl -fe=$@'
3175         _cc_o='-fe=$@'
3176         _depflags='-ppa -ppd=$(@:.o=.d)'
3177         _cflags_speed='-O3 -mf=5'
3178         _cflags_size='-O3 -mf=2'
3179         _flags_filter=tms470_flags
3180     elif $_cc -v 2>&1 | grep -q clang; then
3181         _type=clang
3182         _ident=$($_cc --version 2>/dev/null | head -n1)
3183         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3184         _cflags_speed='-O3'
3185         _cflags_size='-Os'
3186     elif $_cc -V 2>&1 | grep -q Sun; then
3187         _type=suncc
3188         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3189         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3190         _DEPFLAGS='-xM1 -xc99'
3191         _ldflags='-std=c99'
3192         _cflags_speed='-O5'
3193         _cflags_size='-O5 -xspace'
3194         _flags_filter=suncc_flags
3195     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3196         _type=pathscale
3197         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3198         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3199         _cflags_speed='-O2'
3200         _cflags_size='-Os'
3201         _flags_filter='filter_out -Wdisabled-optimization'
3202     elif $_cc -v 2>&1 | grep -q Open64; then
3203         _type=open64
3204         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3205         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3206         _cflags_speed='-O2'
3207         _cflags_size='-Os'
3208         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3209     elif $_cc -V 2>&1 | grep -q Portland; then
3210         _type=pgi
3211         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3212         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3213         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3214         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3215         _cflags_noopt="-O1"
3216         _flags_filter=pgi_flags
3217     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3218         _type=armasm
3219         _ident=$($_cc | head -n1)
3220         # 4509: "This form of conditional instruction is deprecated"
3221         _flags="-nologo -ignore 4509"
3222         _flags_filter=armasm_flags
3223     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3224         _type=msvc
3225         _ident=$($_cc 2>&1 | head -n1)
3226         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3227         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3228         _cflags_speed="-O2"
3229         _cflags_size="-O1"
3230         if $_cc -nologo- 2>&1 | grep -q Linker; then
3231             _ld_o='-out:$@'
3232         else
3233             _ld_o='-Fe$@'
3234         fi
3235         _cc_o='-Fo$@'
3236         _cc_e='-P -Fi$@'
3237         _flags_filter=msvc_flags
3238         _ld_lib='lib%.a'
3239         _ld_path='-libpath:'
3240         _flags='-nologo'
3241         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3242     elif $_cc 2>&1 | grep -q Intel; then
3243         _type=icl
3244         _ident=$($_cc 2>&1 | head -n1)
3245         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3246         # Not only is O3 broken on 13.x+ but it is slower on all previous
3247         # versions (tested) as well.
3248         _cflags_speed="-O2"
3249         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3250         if $_cc 2>&1 | grep -q Linker; then
3251             _ld_o='-out:$@'
3252         else
3253             _ld_o='-Fe$@'
3254         fi
3255         _cc_o='-Fo$@'
3256         _cc_e='-P'
3257         _flags_filter=icl_flags
3258         _ld_lib='lib%.a'
3259         _ld_path='-libpath:'
3260         # -Qdiag-error to make icl error when seeing certain unknown arguments
3261         _flags='-nologo -Qdiag-error:4044,10157'
3262         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3263         # with MSVC which enables it by default.
3264         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3265     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3266         _type=cparser
3267         _ident=$($_cc --version | head -n1)
3268         _depflags='-MMD'
3269         _cflags_speed='-O4'
3270         _cflags_size='-O2'
3271         _flags_filter=cparser_flags
3272     fi
3273
3274     eval ${pfx}_type=\$_type
3275     eval ${pfx}_ident=\$_ident
3276 }
3277
3278 set_ccvars(){
3279     eval ${1}_C=\${_cc_c-\${${1}_C}}
3280     eval ${1}_E=\${_cc_e-\${${1}_E}}
3281     eval ${1}_O=\${_cc_o-\${${1}_O}}
3282
3283     if [ -n "$_depflags" ]; then
3284         eval ${1}_DEPFLAGS=\$_depflags
3285     else
3286         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3287         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3288         eval DEP${1}FLAGS=\$_flags
3289     fi
3290 }
3291
3292 probe_cc cc "$cc"
3293 cflags_filter=$_flags_filter
3294 cflags_speed=$_cflags_speed
3295 cflags_size=$_cflags_size
3296 cflags_noopt=$_cflags_noopt
3297 add_cflags $_flags $_cflags
3298 cc_ldflags=$_ldflags
3299 set_ccvars CC
3300
3301 probe_cc hostcc "$host_cc"
3302 host_cflags_filter=$_flags_filter
3303 add_host_cflags  $_flags $_cflags
3304 set_ccvars HOSTCC
3305
3306 test -n "$cc_type" && enable $cc_type ||
3307     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3308
3309 : ${as_default:=$cc}
3310 : ${objcc_default:=$cc}
3311 : ${dep_cc_default:=$cc}
3312 : ${ld_default:=$cc}
3313 : ${host_ld_default:=$host_cc}
3314 set_default ar as objcc dep_cc ld host_ld
3315
3316 probe_cc as "$as"
3317 asflags_filter=$_flags_filter
3318 add_asflags $_flags $_cflags
3319 set_ccvars AS
3320
3321 probe_cc objcc "$objcc"
3322 objcflags_filter=$_flags_filter
3323 add_objcflags $_flags $_cflags
3324 set_ccvars OBJC
3325
3326 probe_cc ld "$ld"
3327 ldflags_filter=$_flags_filter
3328 add_ldflags $_flags $_ldflags
3329 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3330 LD_O=${_ld_o-$LD_O}
3331 LD_LIB=${_ld_lib-$LD_LIB}
3332 LD_PATH=${_ld_path-$LD_PATH}
3333
3334 probe_cc hostld "$host_ld"
3335 host_ldflags_filter=$_flags_filter
3336 add_host_ldflags $_flags $_ldflags
3337 HOSTLD_O=${_ld_o-$HOSTLD_O}
3338
3339 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3340     probe_cc depcc "$dep_cc"
3341     CCDEP=${_DEPCMD:-$DEPCMD}
3342     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3343     DEPCCFLAGS=$_flags
3344 fi
3345
3346 if $ar 2>&1 | grep -q Microsoft; then
3347     arflags="-nologo"
3348     ar_o='-out:$@'
3349 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3350     arflags="rq"
3351     ar_o='$@'
3352 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3353     arflags='-Xany -r -c'
3354     ar_o='$@'
3355 else
3356     arflags="rc"
3357     ar_o='$@'
3358 fi
3359
3360 add_cflags $extra_cflags
3361 add_objcflags $extra_objcflags
3362 add_asflags $extra_cflags
3363
3364 if test -n "$sysroot"; then
3365     case "$cc_type" in
3366         gcc|llvm_gcc|clang)
3367             add_cppflags --sysroot="$sysroot"
3368             add_ldflags --sysroot="$sysroot"
3369         ;;
3370         tms470)
3371             add_cppflags -I"$sysinclude"
3372             add_ldflags  --sysroot="$sysroot"
3373         ;;
3374     esac
3375 fi
3376
3377 if test "$cpu" = host; then
3378     enabled cross_compile &&
3379         die "--cpu=host makes no sense when cross-compiling."
3380
3381     case "$cc_type" in
3382         gcc|llvm_gcc)
3383             check_native(){
3384                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3385                 sed -n "/cc1.*$1=/{
3386                             s/.*$1=\\([^ ]*\\).*/\\1/
3387                             p
3388                             q
3389                         }" $TMPE
3390             }
3391             cpu=$(check_native -march || check_native -mcpu)
3392         ;;
3393     esac
3394
3395     test "${cpu:-host}" = host &&
3396         die "--cpu=host not supported with compiler $cc"
3397 fi
3398
3399 # Deal with common $arch aliases
3400 case "$arch" in
3401     aarch64|arm64)
3402         arch="aarch64"
3403     ;;
3404     arm*)
3405         arch="arm"
3406     ;;
3407     mips*|IP*)
3408         case "$arch" in
3409         *el)
3410             add_cppflags -EL
3411             add_ldflags -EL
3412         ;;
3413         *eb)
3414             add_cppflags -EB
3415             add_ldflags -EB
3416         ;;
3417         esac
3418         arch="mips"
3419     ;;
3420     parisc*|hppa*)
3421         arch="parisc"
3422     ;;
3423     "Power Macintosh"|ppc*|powerpc*)
3424         arch="ppc"
3425     ;;
3426     s390|s390x)
3427         arch="s390"
3428     ;;
3429     sh4|sh)
3430         arch="sh4"
3431     ;;
3432     sun4u|sparc*)
3433         arch="sparc"
3434     ;;
3435     tilegx|tile-gx)
3436         arch="tilegx"
3437     ;;
3438     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3439         arch="x86"
3440     ;;
3441 esac
3442
3443 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3444 enable $arch
3445
3446 # Add processor-specific flags
3447 if enabled aarch64; then
3448
3449     case $cpu in
3450         armv*)
3451             cpuflags="-march=$cpu"
3452         ;;
3453         *)
3454             cpuflags="-mcpu=$cpu"
3455         ;;
3456     esac
3457
3458 elif enabled alpha; then
3459
3460     cpuflags="-mcpu=$cpu"
3461
3462 elif enabled arm; then
3463
3464     check_arm_arch() {
3465         check_cpp_condition stddef.h \
3466             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3467             $cpuflags
3468     }
3469
3470     probe_arm_arch() {
3471         if   check_arm_arch 4;        then echo armv4
3472         elif check_arm_arch 4T;       then echo armv4t
3473         elif check_arm_arch 5;        then echo armv5
3474         elif check_arm_arch 5E;       then echo armv5e
3475         elif check_arm_arch 5T;       then echo armv5t
3476         elif check_arm_arch 5TE;      then echo armv5te
3477         elif check_arm_arch 5TEJ;     then echo armv5te
3478         elif check_arm_arch 6;        then echo armv6
3479         elif check_arm_arch 6J;       then echo armv6j
3480         elif check_arm_arch 6K;       then echo armv6k
3481         elif check_arm_arch 6Z;       then echo armv6z
3482         elif check_arm_arch 6ZK;      then echo armv6zk
3483         elif check_arm_arch 6T2;      then echo armv6t2
3484         elif check_arm_arch 7;        then echo armv7
3485         elif check_arm_arch 7A  7_A;  then echo armv7-a
3486         elif check_arm_arch 7S;       then echo armv7-a
3487         elif check_arm_arch 7R  7_R;  then echo armv7-r
3488         elif check_arm_arch 7M  7_M;  then echo armv7-m
3489         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3490         elif check_arm_arch 8A  8_A;  then echo armv8-a
3491         fi
3492     }
3493
3494     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3495
3496     case $cpu in
3497         armv*)
3498             cpuflags="-march=$cpu"
3499             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3500         ;;
3501         *)
3502             cpuflags="-mcpu=$cpu"
3503             case $cpu in
3504                 cortex-a*)                               subarch=armv7a  ;;
3505                 cortex-r*)                               subarch=armv7r  ;;
3506                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3507                 arm11*)                                  subarch=armv6   ;;
3508                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3509                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3510                 *)                             subarch=$(probe_arm_arch) ;;
3511             esac
3512         ;;
3513     esac
3514
3515     case "$subarch" in
3516         armv5t*)    enable fast_clz                ;;
3517         armv[6-8]*) enable fast_clz fast_unaligned ;;
3518     esac
3519
3520 elif enabled avr32; then
3521
3522     case $cpu in
3523         ap7[02]0[0-2])
3524             subarch="avr32_ap"
3525             cpuflags="-mpart=$cpu"
3526         ;;
3527         ap)
3528             subarch="avr32_ap"
3529             cpuflags="-march=$cpu"
3530         ;;
3531         uc3[ab]*)
3532             subarch="avr32_uc"
3533             cpuflags="-mcpu=$cpu"
3534         ;;
3535         uc)
3536             subarch="avr32_uc"
3537             cpuflags="-march=$cpu"
3538         ;;
3539     esac
3540
3541 elif enabled bfin; then
3542
3543     cpuflags="-mcpu=$cpu"
3544
3545 elif enabled mips; then
3546
3547     cpuflags="-march=$cpu"
3548
3549 elif enabled ppc; then
3550
3551     disable ldbrx
3552
3553     case $(tolower $cpu) in
3554         601|ppc601|powerpc601)
3555             cpuflags="-mcpu=601"
3556             disable altivec
3557         ;;
3558         603*|ppc603*|powerpc603*)
3559             cpuflags="-mcpu=603"
3560             disable altivec
3561         ;;
3562         604*|ppc604*|powerpc604*)
3563             cpuflags="-mcpu=604"
3564             disable altivec
3565         ;;
3566         g3|75*|ppc75*|powerpc75*)
3567             cpuflags="-mcpu=750"
3568             disable altivec
3569         ;;
3570         g4|745*|ppc745*|powerpc745*)
3571             cpuflags="-mcpu=7450"
3572             disable vsx
3573         ;;
3574         74*|ppc74*|powerpc74*)
3575             cpuflags="-mcpu=7400"
3576             disable vsx
3577         ;;
3578         g5|970|ppc970|powerpc970)
3579             cpuflags="-mcpu=970"
3580             disable vsx
3581         ;;
3582         power[3-6]*)
3583             cpuflags="-mcpu=$cpu"
3584             disable vsx
3585         ;;
3586         power[7-8]*)
3587             cpuflags="-mcpu=$cpu"
3588             enable ldbrx
3589         ;;
3590         cell)
3591             cpuflags="-mcpu=cell"
3592             enable ldbrx
3593             disable vsx
3594         ;;
3595         e500mc)
3596             cpuflags="-mcpu=e500mc"
3597             disable altivec
3598         ;;
3599         e500v2)
3600             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3601             disable altivec
3602             disable dcbzl
3603         ;;
3604         e500)
3605             cpuflags="-mcpu=8540 -mhard-float"
3606             disable altivec
3607             disable dcbzl
3608         ;;
3609     esac
3610
3611 elif enabled sparc; then
3612
3613     case $cpu in
3614         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3615             cpuflags="-mcpu=$cpu"
3616         ;;
3617         ultrasparc*|niagara[234])
3618             cpuflags="-mcpu=$cpu"
3619         ;;
3620     esac
3621
3622 elif enabled x86; then
3623
3624     case $cpu in
3625         i[345]86|pentium)
3626             cpuflags="-march=$cpu"
3627             disable i686
3628             disable mmx
3629         ;;
3630         # targets that do NOT support nopl and conditional mov (cmov)
3631         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3632             cpuflags="-march=$cpu"
3633             disable i686
3634         ;;
3635         # targets that do support nopl and conditional mov (cmov)
3636         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3637             cpuflags="-march=$cpu"
3638             enable i686
3639             enable fast_cmov
3640         ;;
3641         # targets that do support conditional mov but on which it's slow
3642         pentium4|pentium4m|prescott|nocona)
3643             cpuflags="-march=$cpu"
3644             enable i686
3645             disable fast_cmov
3646         ;;
3647     esac
3648
3649 fi
3650
3651 if [ "$cpu" != generic ]; then
3652     add_cflags  $cpuflags
3653     add_asflags $cpuflags
3654     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3655 fi
3656
3657 # compiler sanity check
3658 check_exec <<EOF
3659 int main(void){ return 0; }
3660 EOF
3661 if test "$?" != 0; then
3662     echo "$cc is unable to create an executable file."
3663     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3664         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3665         echo "Only do this if you know what cross compiling means."
3666     fi
3667     die "C compiler test failed."
3668 fi
3669
3670 add_cppflags -D_ISOC99_SOURCE
3671 check_cflags -std=c99
3672 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3673 #include <stdlib.h>
3674 EOF
3675 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3676 #include <stdlib.h>
3677 EOF
3678
3679 add_host_cppflags -D_ISOC99_SOURCE
3680 check_host_cflags -std=c99
3681 check_host_cflags -Wall
3682 check_host_cflags -O3
3683
3684 check_64bit(){
3685     arch32=$1
3686     arch64=$2
3687     expr=$3
3688     check_code cc "" "int test[2*($expr) - 1]" &&
3689         subarch=$arch64 || subarch=$arch32
3690 }
3691
3692 case "$arch" in
3693     aarch64|alpha|ia64)
3694         spic=$shared
3695     ;;
3696     mips)
3697         check_64bit mips mips64 '_MIPS_SIM > 1'
3698         spic=$shared
3699     ;;
3700     parisc)
3701         check_64bit parisc parisc64 'sizeof(void *) > 4'
3702         spic=$shared
3703     ;;
3704     ppc)
3705         check_64bit ppc ppc64 'sizeof(void *) > 4'
3706         spic=$shared
3707     ;;
3708     s390)
3709         check_64bit s390 s390x 'sizeof(void *) > 4'
3710         spic=$shared
3711     ;;
3712     sparc)
3713         check_64bit sparc sparc64 'sizeof(void *) > 4'
3714         spic=$shared
3715     ;;
3716     x86)
3717         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3718         if test "$subarch" = "x86_64"; then
3719             spic=$shared
3720         fi
3721     ;;
3722 esac
3723
3724 enable $subarch
3725 enabled spic && enable_weak pic
3726
3727 # OS specific
3728 case $target_os in
3729     aix)
3730         SHFLAGS=-shared
3731         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3732         enabled shared && add_ldflags -Wl,-brtl
3733         ;;
3734     android)
3735         disable symver
3736         enable section_data_rel_ro
3737         SLIB_INSTALL_NAME='$(SLIBNAME)'
3738         SLIB_INSTALL_LINKS=
3739         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3740         ;;
3741     haiku)
3742         prefix_default="/boot/common"
3743         network_extralibs="-lnetwork"
3744         host_libs=
3745         ;;
3746     sunos)
3747         SHFLAGS='-shared -Wl,-h,$$(@F)'
3748         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3749         network_extralibs="-lsocket -lnsl"
3750         # When using suncc to build, the Solaris linker will mark
3751         # an executable with each instruction set encountered by
3752         # the Solaris assembler.  As our libraries contain their own
3753         # guards for processor-specific code, instead suppress
3754         # generation of the HWCAPS ELF section on Solaris x86 only.
3755         enabled_all suncc x86 &&
3756             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3757             add_ldflags -Wl,-M,mapfile
3758         nm_default='nm -P -g'
3759         version_script='-M'
3760         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3761         ;;
3762     netbsd)
3763         disable symver
3764         oss_indev_extralibs="-lossaudio"
3765         oss_outdev_extralibs="-lossaudio"
3766         ;;
3767     openbsd|bitrig)
3768         disable symver
3769         SHFLAGS='-shared'
3770         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3771         SLIB_INSTALL_LINKS=
3772         oss_indev_extralibs="-lossaudio"
3773         oss_outdev_extralibs="-lossaudio"
3774         ;;
3775     dragonfly)
3776         disable symver
3777         ;;
3778     freebsd)
3779         ;;
3780     bsd/os)
3781         add_extralibs -lpoll -lgnugetopt
3782         ;;
3783     darwin)
3784         enabled ppc && add_asflags -force_cpusubtype_ALL
3785         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3786         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3787         add_ldflags -Wl,-dynamic,-search_paths_first
3788         SLIBSUF=".dylib"
3789         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3790         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3791         objformat="macho"
3792         enabled x86_64 && objformat="macho64"
3793         enabled_any pic shared ||
3794             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3795         check_header dispatch/dispatch.h &&
3796             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3797         ;;
3798     msys*)
3799         die "Native MSYS builds are discouraged, please use the MINGW environment."
3800         ;;
3801     mingw32*|mingw64*)
3802         if test $target_os = "mingw32ce"; then
3803             disable network
3804         else
3805             target_os=mingw32
3806         fi
3807         LIBTARGET=i386
3808         if enabled x86_64; then
3809             LIBTARGET="i386:x86-64"
3810         elif enabled arm; then
3811             LIBTARGET=arm-wince
3812         fi
3813         check_ldflags -Wl,--nxcompat
3814         check_ldflags -Wl,--dynamicbase
3815         shlibdir_default="$bindir_default"
3816         SLIBPREF=""
3817         SLIBSUF=".dll"
3818         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3819         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3820         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3821         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3822         SLIB_INSTALL_LINKS=
3823         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3824         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3825         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3826         objformat="win32"
3827         dlltool="${cross_prefix}dlltool"
3828         ranlib=:
3829         enable dos_paths
3830         ;;
3831     win32|win64)
3832         disable symver
3833         if enabled shared; then
3834             # Link to the import library instead of the normal static library
3835             # for shared libs.
3836             LD_LIB='%.lib'
3837             # Cannot build both shared and static libs with MSVC or icl.
3838             disable static
3839         fi
3840         shlibdir_default="$bindir_default"
3841         SLIBPREF=""
3842         SLIBSUF=".dll"
3843         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3844         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3845         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3846         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3847         SLIB_INSTALL_LINKS=
3848         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3849         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3850         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3851         objformat="win32"
3852         ranlib=:
3853         enable dos_paths
3854         ;;
3855     cygwin*)
3856         target_os=cygwin
3857         shlibdir_default="$bindir_default"
3858         SLIBPREF="cyg"
3859         SLIBSUF=".dll"
3860         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3861         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3862         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3863         SLIB_INSTALL_LINKS=
3864         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3865         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3866         objformat="win32"
3867         enable dos_paths
3868         ;;
3869     *-dos|freedos|opendos)
3870         network_extralibs="-lsocket"
3871         objformat="coff"
3872         enable dos_paths
3873         add_cppflags -U__STRICT_ANSI__
3874         ;;
3875     linux)
3876         enable dv1394
3877         enable section_data_rel_ro
3878         ;;
3879     irix*)
3880         target_os=irix
3881         ranlib="echo ignoring ranlib"
3882         ;;
3883     os/2*)
3884         ln_s="cp -f"
3885         objformat="aout"
3886         add_cppflags -D_GNU_SOURCE
3887         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3888         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3889         LIBSUF="_s.a"
3890         SLIBPREF=""
3891         SLIBSUF=".dll"
3892         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3893         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3894         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3895             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3896             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3897             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3898             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3899         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3900             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3901         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3902         enable dos_paths
3903         ;;
3904     gnu/kfreebsd)
3905         add_cppflags -D_BSD_SOURCE
3906         ;;
3907     gnu)
3908         ;;
3909     qnx)
3910         add_cppflags -D_QNX_SOURCE
3911         network_extralibs="-lsocket"
3912         ;;
3913     symbian)
3914         SLIBSUF=".dll"
3915         enable dos_paths
3916         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3917         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3918         add_ldflags -Wl,--target1-abs,--no-undefined \
3919                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3920                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3921         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3922                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3923                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3924         ;;
3925     osf1)
3926         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3927         ;;
3928     minix)
3929         ;;
3930     plan9)
3931         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3932                      -D_REENTRANT_SOURCE        \
3933                      -D_RESEARCH_SOURCE         \
3934                      -DFD_SETSIZE=96            \
3935                      -DHAVE_SOCK_OPTS
3936         add_compat strtod.o strtod=avpriv_strtod
3937         network_extralibs='-lbsd'
3938         exeobjs=compat/plan9/main.o
3939         cp_f='cp'
3940         ;;
3941     none)
3942         ;;
3943     *)
3944         die "Unknown OS '$target_os'."
3945         ;;
3946 esac
3947
3948 # determine libc flavour
3949
3950 probe_libc(){
3951     pfx=$1
3952     pfx_no_=${pfx%_}
3953     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3954     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3955         eval ${pfx}libc_type=uclibc
3956         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3957     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3958         eval ${pfx}libc_type=glibc
3959         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3960     # MinGW headers can be installed on Cygwin, so check for newlib first.
3961     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3962         eval ${pfx}libc_type=newlib
3963         add_${pfx}cppflags -U__STRICT_ANSI__
3964     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3965     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3966         eval ${pfx}libc_type=mingw64
3967         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3968         eval test \$${pfx_no_}cc_type = "gcc" &&
3969             add_${pfx}cppflags -D__printf__=__gnu_printf__
3970     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3971          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3972         eval ${pfx}libc_type=mingw32
3973         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3974             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3975             die "ERROR: MinGW32 runtime version must be >= 3.15."
3976         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3977         eval test \$${pfx_no_}cc_type = "gcc" &&
3978             add_${pfx}cppflags -D__printf__=__gnu_printf__
3979     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3980         eval ${pfx}libc_type=msvcrt
3981         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3982             if [ "$pfx" = host_ ]; then
3983                 add_host_cppflags -Dsnprintf=_snprintf
3984             else
3985                 add_compat strtod.o strtod=avpriv_strtod
3986                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3987                                              _snprintf=avpriv_snprintf  \
3988                                              vsnprintf=avpriv_vsnprintf
3989             fi
3990         fi
3991         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3992         # 0x601 by default unless something else is set by the user.
3993         # This can easily lead to us detecting functions only present
3994         # in such new versions and producing binaries requiring windows 7.0.
3995         # Therefore explicitly set the default to XP unless the user has
3996         # set something else on the command line.
3997         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3998         # family. For these cases, configure is free to use any functions
3999         # found in the SDK headers by default. (Alternatively, we could force
4000         # _WIN32_WINNT to 0x0602 in that case.)
4001         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4002             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4003 #ifdef WINAPI_FAMILY
4004 #include <winapifamily.h>
4005 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4006 #error not desktop
4007 #endif
4008 #endif
4009 EOF
4010     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4011         eval ${pfx}libc_type=klibc
4012     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4013         eval ${pfx}libc_type=bionic
4014     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4015         eval ${pfx}libc_type=solaris
4016         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4017     else
4018         eval ${pfx}libc_type=default
4019         add_${pfx}cppflags -D_DEFAULT_SOURCE
4020     fi
4021 }
4022
4023 probe_libc
4024 test -n "$libc_type" && enable libc_$libc_type
4025 probe_libc host_
4026 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4027
4028 case $libc_type in
4029     bionic)
4030         add_compat strtod.o strtod=avpriv_strtod
4031         ;;
4032 esac
4033
4034 # hacks for compiler/libc/os combinations
4035
4036 if enabled_all tms470 libc_glibc; then
4037     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4038     add_cppflags -D__USER_LABEL_PREFIX__=
4039     add_cppflags -D__builtin_memset=memset
4040     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4041     add_cflags   -pds=48    # incompatible redefinition of macro
4042 fi
4043
4044 if enabled_all ccc libc_glibc; then
4045     add_ldflags -Wl,-z,now  # calls to libots crash without this
4046 fi
4047
4048 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4049     add_cppflags '-I\$(SRC_PATH)/compat/float'
4050
4051 esc(){
4052     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4053 }
4054
4055 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4056
4057 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4058
4059 set_default $PATHS_LIST
4060 set_default nm
4061
4062 # we need to build at least one lib type
4063 if ! enabled_any static shared; then
4064     cat <<EOF
4065 At least one library type must be built.
4066 Specify --enable-static to build the static libraries or --enable-shared to
4067 build the shared libraries as well. To only build the shared libraries specify
4068 --disable-static in addition to --enable-shared.
4069 EOF
4070     exit 1
4071 fi
4072
4073 die_license_disabled() {
4074     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4075 }
4076
4077 die_license_disabled gpl libcdio
4078 die_license_disabled gpl libx264
4079 die_license_disabled gpl libx265
4080 die_license_disabled gpl libxavs
4081 die_license_disabled gpl libxvid
4082 die_license_disabled gpl x11grab
4083
4084 die_license_disabled nonfree cuda
4085 die_license_disabled nonfree libfaac
4086 die_license_disabled nonfree libfdk_aac
4087 die_license_disabled nonfree libnpp
4088 die_license_disabled nonfree openssl
4089
4090 die_license_disabled version3 libopencore_amrnb
4091 die_license_disabled version3 libopencore_amrwb
4092 die_license_disabled version3 libvo_aacenc
4093 die_license_disabled version3 libvo_amrwbenc
4094
4095 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4096
4097 disabled optimizations || check_cflags -fomit-frame-pointer
4098
4099 enable_weak_pic() {
4100     disabled pic && return
4101     enable pic
4102     add_cppflags -DPIC
4103     case "$target_os" in
4104     mingw*|cygwin*)
4105         ;;
4106     *)
4107         add_cflags -fPIC
4108         ;;
4109     esac
4110     add_asflags  -fPIC
4111 }
4112
4113 enabled pic && enable_weak_pic
4114
4115 check_cc <<EOF || die "Symbol mangling check failed."
4116 int ff_extern;
4117 EOF
4118 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4119 extern_prefix=${sym%%ff_extern*}
4120
4121 check_cc <<EOF && enable_weak inline_asm
4122 void foo(void) { __asm__ volatile ("" ::); }
4123 EOF
4124
4125 _restrict=
4126 for restrict_keyword in restrict __restrict__ __restrict; do
4127     check_cc <<EOF && _restrict=$restrict_keyword && break
4128 void foo(char * $restrict_keyword p);
4129 EOF
4130 done
4131
4132 check_cc <<EOF && enable pragma_deprecated
4133 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4134 EOF
4135
4136 check_cc <<EOF && enable attribute_packed
4137 struct { int x; } __attribute__((packed)) x;
4138 EOF
4139
4140 check_cc <<EOF && enable attribute_may_alias
4141 union { int x; } __attribute__((may_alias)) x;
4142 EOF
4143
4144 check_cc <<EOF || die "endian test failed"
4145 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4146 EOF
4147 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4148
4149 check_gas() {
4150     log "check_gas using '$as' as AS"
4151     # :vararg is used on aarch64, arm and ppc altivec
4152     check_as <<EOF || return 1
4153 .macro m n, y:vararg=0
4154 \n: .int \y
4155 .endm
4156 m x
4157 EOF
4158     # .altmacro is only used in arm asm
4159     ! enabled arm || check_as <<EOF || return 1
4160 .altmacro
4161 EOF
4162     enable gnu_as
4163     return 0
4164 }
4165
4166 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4167     nogas=:
4168     enabled_any arm aarch64 && nogas=die
4169     enabled_all ppc altivec && nogas=warn
4170     as_noop=-v
4171
4172     case $as_type in
4173         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4174         gcc)  gaspp_as_type=gas ;;
4175         *)    gaspp_as_type=$as_type ;;
4176     esac
4177
4178     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4179
4180     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4181         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4182
4183     if ! check_gas ; then
4184         as=${gas:=$as}
4185         check_gas || \
4186             $nogas "GNU assembler not found, install/update gas-preprocessor"
4187     fi
4188
4189     check_as <<EOF && enable as_func
4190 .func test
4191 .endfunc
4192 EOF
4193 fi
4194
4195 check_inline_asm inline_asm_labels '"1:\n"'
4196
4197 if enabled aarch64; then
4198     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4199     # internal assembler in clang 3.3 does not support this instruction
4200     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4201     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4202
4203     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4204
4205 elif enabled alpha; then
4206
4207     check_cflags -mieee
4208
4209 elif enabled arm; then
4210
4211     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4212     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4213     enabled thumb && check_cflags -mthumb || check_cflags -marm
4214
4215     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4216         enable vfp_args
4217     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4218         enable vfp_args
4219     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4220         case "${cross_prefix:-$cc}" in
4221             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4222             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4223 __asm__ (".eabi_attribute 28, 1");
4224 int main(void) { return 0; }
4225 EOF
4226         esac
4227         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4228     fi
4229
4230     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4231     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4232     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4233     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4234     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4235     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4236
4237     [ $target_os = linux ] || [ $target_os = android ] ||
4238         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4239             $ARCH_EXT_LIST_ARM
4240
4241     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4242
4243     check_as <<EOF && enable as_dn_directive
4244 ra .dn d0.i16
4245 .unreq ra
4246 EOF
4247     check_as <<EOF && enable as_fpu_directive
4248 .fpu neon
4249 EOF
4250
4251     # llvm's integrated assembler supports .object_arch from llvm 3.5
4252     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4253 .object_arch armv4
4254 EOF
4255
4256     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4257
4258 elif enabled mips; then
4259
4260     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4261
4262     # make sure that only an instruction set is enabled
4263     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4264
4265     if enabled mips64; then
4266         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4267             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4268                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4269     else
4270         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4271             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4272                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4273     fi
4274
4275 elif enabled parisc; then
4276
4277     if enabled gcc; then
4278         case $($cc -dumpversion) in
4279             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4280         esac
4281     fi
4282
4283 elif enabled ppc; then
4284
4285     enable local_aligned_8 local_aligned_16
4286
4287     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4288     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4289     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4290     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4291
4292     # AltiVec flags: The FSF version of GCC differs from the Apple version
4293     if enabled altivec; then
4294         check_cflags -maltivec -mabi=altivec &&
4295         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4296         check_cflags -faltivec
4297
4298         # check if our compiler supports Motorola AltiVec C API
4299         check_cc <<EOF || disable altivec
4300 $inc_altivec_h
4301 int main(void) {
4302     vector signed int v1 = (vector signed int) { 0 };
4303     vector signed int v2 = (vector signed int) { 1 };
4304     v1 = vec_add(v1, v2);
4305     return 0;
4306 }
4307 EOF
4308
4309         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4310     fi
4311
4312     if enabled vsx; then
4313         check_cflags -mvsx &&
4314         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4315     fi
4316
4317     if enabled power8; then
4318         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4319     fi
4320
4321 elif enabled x86; then
4322
4323     check_builtin rdtsc    intrin.h   "__rdtsc()"
4324     check_builtin mm_empty mmintrin.h "_mm_empty()"
4325
4326     enable local_aligned_8 local_aligned_16
4327
4328     # check whether EBP is available on x86
4329     # As 'i' is stored on the stack, this program will crash
4330     # if the base pointer is used to access it because the
4331     # base pointer is cleared in the inline assembly code.
4332     check_exec_crash <<EOF && enable ebp_available
4333 volatile int i=0;
4334 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4335 return i;
4336 EOF
4337
4338     # check whether EBX is available on x86
4339     check_inline_asm ebx_available '""::"b"(0)' &&
4340         check_inline_asm ebx_available '"":::"%ebx"'
4341
4342     # check whether xmm clobbers are supported
4343     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4344
4345     # check whether binutils is new enough to compile SSSE3/MMXEXT
4346     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4347     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4348
4349     if ! disabled_any asm mmx yasm; then
4350         if check_cmd $yasmexe --version; then
4351             enabled x86_64 && yasm_extra="-m amd64"
4352             yasm_debug="-g dwarf2"
4353         elif check_cmd nasm -v; then
4354             yasmexe=nasm
4355             yasm_debug="-g -F dwarf"
4356             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4357         fi
4358
4359         YASMFLAGS="-f $objformat $yasm_extra"
4360         enabled pic               && append YASMFLAGS "-DPIC"
4361         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4362         case "$objformat" in
4363             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4364         esac
4365
4366         check_yasm "movbe ecx, [5]" && enable yasm ||
4367             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4368         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4369         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4370         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4371         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4372         check_yasm "CPU amdnop" || disable cpunop
4373     fi
4374
4375     case "$cpu" in
4376         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4377             disable fast_clz
4378         ;;
4379     esac
4380
4381 fi
4382
4383 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4384
4385 check_ldflags -Wl,--as-needed
4386
4387 if check_func dlopen; then
4388     ldl=
4389 elif check_func dlopen -ldl; then
4390     ldl=-ldl
4391 fi
4392
4393 if ! disabled network; then
4394     check_func getaddrinfo $network_extralibs
4395     check_func inet_aton $network_extralibs
4396
4397     check_type netdb.h "struct addrinfo"
4398     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4399     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4400     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4401     check_type poll.h "struct pollfd"
4402     check_type netinet/sctp.h "struct sctp_event_subscribe"
4403     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4404     check_type netinet/in.h "struct sockaddr_in6"
4405     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4406     check_type "sys/types.h sys/socket.h" socklen_t
4407
4408     # Prefer arpa/inet.h over winsock2
4409     if check_header arpa/inet.h ; then
4410         check_func closesocket
4411     elif check_header winsock2.h ; then
4412         check_func_headers winsock2.h closesocket -lws2 &&
4413             network_extralibs="-lws2" ||
4414         { check_func_headers winsock2.h closesocket -lws2_32 &&
4415             network_extralibs="-lws2_32"; } || disable winsock2_h network
4416         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4417
4418         check_type ws2tcpip.h socklen_t
4419         check_type ws2tcpip.h "struct addrinfo"
4420         check_type ws2tcpip.h "struct group_source_req"
4421         check_type ws2tcpip.h "struct ip_mreq_source"
4422         check_type ws2tcpip.h "struct ipv6_mreq"
4423         check_type winsock2.h "struct pollfd"
4424         check_struct winsock2.h "struct sockaddr" sa_len
4425         check_type ws2tcpip.h "struct sockaddr_in6"
4426         check_type ws2tcpip.h "struct sockaddr_storage"
4427     else
4428         disable network
4429     fi
4430 fi
4431
4432 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4433 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4434 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4435 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4436
4437 case "$custom_allocator" in
4438     jemalloc)
4439         # jemalloc by default does not use a prefix
4440         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4441     ;;
4442     tcmalloc)
4443         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4444         malloc_prefix=tc_
4445     ;;
4446 esac
4447
4448 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4449 check_func  ${malloc_prefix}memalign            && enable memalign
4450 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4451
4452 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4453     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4454
4455 check_func  fcntl
4456 check_func  fork
4457 check_func  gethrtime
4458 check_func  getopt
4459 check_func  getrusage
4460 check_func  gettimeofday
4461 check_func  gmtime_r
4462 check_func  isatty
4463 check_func  localtime_r
4464 check_func  mach_absolute_time
4465 check_func  mkstemp
4466 check_func  mmap
4467 check_func  mprotect
4468 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4469 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4470 check_func  sched_getaffinity
4471 check_func  setrlimit
4472 check_func  strerror_r
4473 check_func  sysconf
4474 check_func  sysctl
4475 check_func  usleep
4476
4477 check_func_headers io.h setmode
4478 check_func_headers stdlib.h getenv
4479
4480 check_func_headers windows.h CoTaskMemFree -lole32
4481 check_func_headers windows.h GetProcessAffinityMask
4482 check_func_headers windows.h GetProcessTimes
4483 check_func_headers windows.h GetSystemTimeAsFileTime
4484 check_func_headers windows.h LoadLibrary
4485 check_func_headers windows.h MapViewOfFile
4486 check_func_headers windows.h SetConsoleTextAttribute
4487 check_func_headers windows.h Sleep
4488 check_func_headers windows.h VirtualAlloc
4489 check_struct windows.h "CONDITION_VARIABLE" Ptr
4490
4491 check_header direct.h
4492 check_header dlfcn.h
4493 check_header d3d11.h
4494 check_header dxva.h
4495 check_header dxva2api.h
4496 check_header io.h
4497 check_header mach/mach_time.h
4498 check_header malloc.h
4499 check_header poll.h
4500 check_header sys/mman.h
4501 check_header sys/param.h
4502 check_header sys/resource.h
4503 check_header sys/select.h
4504 check_header sys/time.h
4505 check_header sys/un.h
4506 check_header unistd.h
4507 check_header valgrind/valgrind.h
4508 check_header vdpau/vdpau.h
4509 check_header vdpau/vdpau_x11.h
4510 check_header VideoDecodeAcceleration/VDADecoder.h
4511 check_header windows.h
4512 check_header X11/extensions/XvMClib.h
4513
4514 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4515 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4516 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4517
4518 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4519
4520 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4521 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4522 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4523
4524 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4525 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4526 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4527 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4528
4529 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4530
4531 if ! disabled w32threads && ! enabled pthreads; then
4532     check_func_headers "windows.h process.h" _beginthreadex &&
4533         enable w32threads || disable w32threads
4534 fi
4535
4536 # check for some common methods of building with pthread support
4537 # do this before the optional library checks as some of them require pthreads
4538 if ! disabled pthreads && ! enabled w32threads; then
4539     enable pthreads
4540     if check_func pthread_join -pthread; then
4541         add_cflags -pthread
4542         add_extralibs -pthread
4543     elif check_func pthread_join -pthreads; then
4544         add_cflags -pthreads
4545         add_extralibs -pthreads
4546     elif check_func pthread_join -lpthreadGC2; then
4547         add_extralibs -lpthreadGC2
4548     elif check_lib pthread.h pthread_join -lpthread; then
4549         :
4550     elif ! check_func pthread_join; then
4551         disable pthreads
4552     fi
4553 fi
4554
4555 enabled pthreads &&
4556     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4557
4558 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4559 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4560
4561 check_lib math.h sin -lm && LIBM="-lm"
4562 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4563
4564 atan2f_args=2
4565 ldexpf_args=2
4566 powf_args=2
4567
4568 for func in $MATH_FUNCS; do
4569     eval check_mathfunc $func \${${func}_args:-1}
4570 done
4571
4572 # these are off by default, so fail if requested and not available
4573 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4574                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4575                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4576 enabled cuda              && check_lib cuda.h cuInit -lcuda
4577 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4578 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4579 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4580 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4581 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4582 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4583 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4584 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4585 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4586                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4587                                done || die "ERROR: libgsm not found"; }
4588 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4589 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4590 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4591 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4592 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4593 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4594 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4595 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4596 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4597 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4598                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4599 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4600 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4601 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4602 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4603 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4604 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4605 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4606 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4607 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4608 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4609 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4610 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4611     enabled libvpx_vp8_decoder && {
4612         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4613             disable libvpx_vp8_decoder;
4614     }
4615     enabled libvpx_vp8_encoder && {
4616         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4617             disable libvpx_vp8_encoder;
4618     }
4619     enabled libvpx_vp9_decoder && {
4620         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4621             disable libvpx_vp9_decoder;
4622     }
4623     enabled libvpx_vp9_encoder && {
4624         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4625             disable libvpx_vp9_encoder;
4626     }
4627     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4628         die "libvpx enabled but no supported decoders found"
4629     fi
4630 }
4631 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4632 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4633 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4634                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4635                                die "ERROR: libx264 version must be >= 0.118."; } &&
4636                              { check_cpp_condition x264.h "X264_MPEG2" &&
4637                                enable libx262; }
4638 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4639                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4640                                die "ERROR: libx265 version must be >= 57."; }
4641 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4642 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4643 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4644                                 { ! enabled cross_compile && {
4645                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4646                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4647                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4648                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4649                                die "ERROR: mmal not found"; }
4650 enabled mmal && check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"
4651 enabled omx_rpi && enable omx
4652 enabled omx               && { check_header OMX_Core.h ||
4653                                 { ! enabled cross_compile && enabled omx_rpi && {
4654                                     add_cflags -isystem/opt/vc/include/IL ; }
4655                                 check_header OMX_Core.h ; } ||
4656                                die "ERROR: OpenMAX IL headers not found"; }
4657 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4658                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4659                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4660                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4661                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4662                                die "ERROR: openssl not found"; }
4663
4664 if enabled gnutls; then
4665     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4666     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4667 fi
4668
4669 # libdc1394 check
4670 if enabled libdc1394; then
4671     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4672         enable libdc1394_2; } ||
4673     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4674         enable libdc1394_1; } ||
4675     die "ERROR: No version of libdc1394 found "
4676 fi
4677
4678 if enabled nvenc; then
4679     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4680     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6" ||
4681         die "ERROR: NVENC API version 5 or older is not supported"
4682 fi
4683
4684 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4685     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4686     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4687     enable sdl
4688 fi
4689
4690 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4691 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4692
4693 check_header linux/fb.h
4694 check_header linux/videodev2.h
4695 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4696
4697 check_header AVFoundation/AVFoundation.h &&
4698     check_objcflags -fobjc-arc &&
4699     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4700     disable AVFoundation_AVFoundation_h
4701
4702 check_header sys/videoio.h
4703
4704 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4705 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4706 # w32api 3.12 had it defined wrong
4707 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4708
4709 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4710 { check_header dev/bktr/ioctl_meteor.h &&
4711   check_header dev/bktr/ioctl_bt848.h; } ||
4712 { check_header machine/ioctl_meteor.h &&
4713   check_header machine/ioctl_bt848.h; } ||
4714 { check_header dev/video/meteor/ioctl_meteor.h &&
4715   check_header dev/video/bktr/ioctl_bt848.h; } ||
4716 check_header dev/ic/bt8xx.h
4717
4718 check_header sndio.h
4719 check_header sys/soundcard.h
4720 check_header soundcard.h
4721
4722 enabled_any alsa_indev alsa_outdev &&
4723     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4724
4725 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4726     check_func jack_port_get_latency_range -ljack
4727
4728 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4729
4730 if enabled libcdio; then
4731     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4732     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4733     die "ERROR: No usable libcdio/cdparanoia found"
4734 fi
4735
4736 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4737
4738 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4739     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4740         enabled libxcb && die "ERROR: libxcb not found";
4741     } && disable x11grab && enable libxcb
4742
4743     disabled libxcb_shm ||
4744         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4745             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4746         } && check_header sys/shm.h && enable libxcb_shm
4747
4748     disabled libxcb_xfixes ||
4749         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4750             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4751         } && enable libxcb_xfixes
4752
4753     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4754     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4755 fi
4756
4757 if enabled x11grab; then
4758     enabled xlib || die "ERROR: Xlib not found"
4759     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4760     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4761 fi
4762
4763 enabled vaapi &&
4764     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4765     disable vaapi
4766
4767 if enabled vaapi ; then
4768     enabled xlib &&
4769     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4770     enable vaapi_x11
4771
4772     check_lib2 "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4773     enable vaapi_drm
4774 fi
4775
4776 enabled vdpau &&
4777     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4778     disable vdpau
4779
4780 enabled vdpau && enabled xlib &&
4781     check_lib2 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4782     enable vdpau_x11
4783
4784 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4785
4786 # add some useful compiler flags if supported
4787 check_cflags -Wdeclaration-after-statement
4788 check_cflags -Wall
4789 check_cflags -Wdisabled-optimization
4790 check_cflags -Wpointer-arith
4791 check_cflags -Wredundant-decls
4792 check_cflags -Wwrite-strings
4793 check_cflags -Wtype-limits
4794 check_cflags -Wundef
4795 check_cflags -Wmissing-prototypes
4796 check_cflags -Wstrict-prototypes
4797 enabled extra_warnings && check_cflags -Winline
4798 enabled extra_warnings && check_cflags -Wcast-qual
4799
4800 check_disable_warning(){
4801     warning_flag=-W${1#-Wno-}
4802     test_cflags $warning_flag && add_cflags $1
4803 }
4804
4805 check_disable_warning -Wno-parentheses
4806 check_disable_warning -Wno-switch
4807 check_disable_warning -Wno-format-zero-length
4808 check_disable_warning -Wno-pointer-sign
4809
4810 # add some linker flags
4811 check_ldflags -Wl,--warn-common
4812 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4813 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4814 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4815
4816 # add some strip flags
4817 # -wN '..@*' is more selective