lavfi: add a QSV deinterlacing filter
[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 deinterlace_qsv_filter_deps="libmfx"
2406 delogo_filter_deps="gpl"
2407 drawtext_filter_deps="libfreetype"
2408 frei0r_filter_deps="frei0r dlopen"
2409 frei0r_filter_extralibs='$ldl'
2410 frei0r_src_filter_deps="frei0r dlopen"
2411 frei0r_src_filter_extralibs='$ldl'
2412 hqdn3d_filter_deps="gpl"
2413 interlace_filter_deps="gpl"
2414 ocv_filter_deps="libopencv"
2415 resample_filter_deps="avresample"
2416 scale_filter_deps="swscale"
2417 scale_qsv_filter_deps="libmfx"
2418 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2419
2420 # examples
2421 avcodec_example_deps="avcodec avutil"
2422 filter_audio_example_deps="avfilter avutil"
2423 metadata_example_deps="avformat avutil"
2424 output_example_deps="avcodec avformat avutil swscale"
2425 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2426 transcode_aac_example_deps="avcodec avformat avresample"
2427
2428 # libraries, in linking order
2429 avcodec_deps="avutil"
2430 avdevice_deps="avformat avcodec avutil"
2431 avfilter_deps="avutil"
2432 avformat_deps="avcodec avutil"
2433 avresample_deps="avutil"
2434 swscale_deps="avutil"
2435
2436 # programs
2437 avconv_deps="avcodec avfilter avformat avresample swscale"
2438 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2439                fps_filter null_filter resample_filter scale_filter
2440                trim_filter"
2441 avplay_deps="avcodec avfilter avformat avresample sdl"
2442 avplay_libs='$sdl_libs'
2443 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2444 avprobe_deps="avcodec avformat"
2445
2446 # documentation
2447 pod2man_deps="doc"
2448 texi2html_deps="doc"
2449
2450 # default parameters
2451
2452 logfile="config.log"
2453
2454 # installation paths
2455 prefix_default="/usr/local"
2456 bindir_default='${prefix}/bin'
2457 datadir_default='${prefix}/share/avconv'
2458 docdir_default='${prefix}/share/doc/libav'
2459 incdir_default='${prefix}/include'
2460 libdir_default='${prefix}/lib'
2461 mandir_default='${prefix}/share/man'
2462 shlibdir_default="$libdir_default"
2463
2464 # toolchain
2465 ar_default="ar"
2466 cc_default="gcc"
2467 host_cc_default="gcc"
2468 cp_f="cp -f"
2469 ln_s="ln -s -f"
2470 nm_default="nm -g"
2471 objformat="elf"
2472 pkg_config_default=pkg-config
2473 ranlib="ranlib"
2474 strip="strip"
2475 version_script='--version-script'
2476 yasmexe="yasm"
2477
2478 # machine
2479 arch_default=$(uname -m)
2480 cpu="generic"
2481 intrinsics="none"
2482
2483 # OS
2484 target_os_default=$(tolower $(uname -s))
2485 host_os=$target_os_default
2486
2487 # configurable options
2488 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2489
2490 enable asm
2491 enable debug
2492 enable doc
2493 enable faan faandct faanidct
2494 enable optimizations
2495 enable safe_bitstream_reader
2496 enable static
2497 enable swscale_alpha
2498 enable valgrind_backtrace
2499
2500 # By default, enable only those hwaccels that have no external dependencies.
2501 enable d3d11va dxva2 vda vdpau
2502
2503 # build settings
2504 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2505 LIBPREF="lib"
2506 LIBSUF=".a"
2507 FULLNAME='$(NAME)$(BUILDSUF)'
2508 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2509 SLIBPREF="lib"
2510 SLIBSUF=".so"
2511 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2512 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2513 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2514 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2515 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2516 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2517 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2518
2519 asflags_filter=echo
2520 cflags_filter=echo
2521 ldflags_filter=echo
2522
2523 AS_C='-c'
2524 AS_O='-o $@'
2525 CC_C='-c'
2526 CC_E='-E -o $@'
2527 CC_O='-o $@'
2528 OBJCC_C='-c'
2529 OBJCC_E='-E -o $@'
2530 OBJCC_O='-o $@'
2531 LD_O='-o $@'
2532 LD_LIB='-l%'
2533 LD_PATH='-L'
2534 HOSTCC_C='-c'
2535 HOSTCC_E='-E -o $@'
2536 HOSTCC_O='-o $@'
2537 HOSTLD_O='-o $@'
2538
2539 host_libs='-lm'
2540 host_cflags_filter=echo
2541 host_ldflags_filter=echo
2542
2543 target_path='$(CURDIR)'
2544
2545 # since the object filename is not given with the -MM flag, the compiler
2546 # is only able to print the basename, and we must add the path ourselves
2547 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2548 DEPFLAGS='-MM'
2549
2550 # find source path
2551 if test -f configure; then
2552     source_path=.
2553 else
2554     source_path=$(cd $(dirname "$0"); pwd)
2555     echo "$source_path" | grep -q '[[:blank:]]' &&
2556         die "Out of tree builds are impossible with whitespace in source path."
2557     test -e "$source_path/config.h" &&
2558         die "Out of tree builds are impossible with config.h in source dir."
2559 fi
2560
2561 for v in "$@"; do
2562     r=${v#*=}
2563     l=${v%"$r"}
2564     r=$(sh_quote "$r")
2565     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2566 done
2567
2568 find_things(){
2569     thing=$1
2570     pattern=$2
2571     file=$source_path/$3
2572     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2573 }
2574
2575 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2576 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2577 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2578 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2579 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2580 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2581 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2582 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2583 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2584
2585 find_things_extern(){
2586     thing=$1
2587     pattern=$2
2588     file=$source_path/$3
2589     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2590 }
2591
2592 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2593 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2594
2595 ALL_COMPONENTS="
2596     $BSF_LIST
2597     $DECODER_LIST
2598     $DEMUXER_LIST
2599     $ENCODER_LIST
2600     $FILTER_LIST
2601     $HWACCEL_LIST
2602     $INDEV_LIST
2603     $MUXER_LIST
2604     $OUTDEV_LIST
2605     $PARSER_LIST
2606     $PROTOCOL_LIST
2607 "
2608
2609 for n in $COMPONENT_LIST; do
2610     v=$(toupper ${n%s})_LIST
2611     eval enable \$$v
2612     eval ${n}_if_any="\$$v"
2613 done
2614
2615 enable $ARCH_EXT_LIST
2616
2617 die_unknown(){
2618     echo "Unknown option \"$1\"."
2619     echo "See $0 --help for available options."
2620     exit 1
2621 }
2622
2623 print_3_columns() {
2624     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2625 }
2626
2627 show_list() {
2628     suffix=_$1
2629     shift
2630     echo $* | sed s/$suffix//g | print_3_columns
2631     exit 0
2632 }
2633
2634 rand_list(){
2635     IFS=', '
2636     set -- $*
2637     unset IFS
2638     for thing; do
2639         comp=${thing%:*}
2640         prob=${thing#$comp}
2641         prob=${prob#:}
2642         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2643         echo "prob ${prob:-0.5}"
2644         printf '%s\n' $comp
2645     done
2646 }
2647
2648 do_random(){
2649     action=$1
2650     shift
2651     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2652     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2653 }
2654
2655 for opt do
2656     optval="${opt#*=}"
2657     case "$opt" in
2658         --extra-ldflags=*)
2659             add_ldflags $optval
2660         ;;
2661         --extra-ldexeflags=*)
2662             add_ldexeflags $optval
2663         ;;
2664         --extra-libs=*)
2665             add_extralibs $optval
2666         ;;
2667         --disable-devices)
2668             disable $INDEV_LIST $OUTDEV_LIST
2669         ;;
2670         --enable-debug=*)
2671             debuglevel="$optval"
2672         ;;
2673         --disable-programs)
2674             disable $PROGRAM_LIST
2675         ;;
2676         --disable-everything)
2677             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2678         ;;
2679         --disable-all)
2680             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2681             disable $LIBRARY_LIST $PROGRAM_LIST doc
2682         ;;
2683         --enable-random|--disable-random)
2684             action=${opt%%-random}
2685             do_random ${action#--} $COMPONENT_LIST
2686         ;;
2687         --enable-random=*|--disable-random=*)
2688             action=${opt%%-random=*}
2689             do_random ${action#--} $optval
2690         ;;
2691         --enable-*=*|--disable-*=*)
2692             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2693             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2694             eval list=\$$(toupper $thing)_LIST
2695             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2696             $action $(filter "$name" $list)
2697         ;;
2698         --enable-avserver|--disable-avserver*)
2699             warn "avserver has been removed, the ${opt} option is only"\
2700                  "provided for compatibility and will be removed in the future"
2701         ;;
2702         --enable-?*|--disable-?*)
2703             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2704             if is_in $option $COMPONENT_LIST; then
2705                 test $action = disable && action=unset
2706                 eval $action \$$(toupper ${option%s})_LIST
2707             elif is_in $option $CMDLINE_SELECT; then
2708                 $action $option
2709             else
2710                 die_unknown $opt
2711             fi
2712         ;;
2713         --list-*)
2714             NAME="${opt#--list-}"
2715             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2716             NAME=${NAME%s}
2717             eval show_list $NAME \$$(toupper $NAME)_LIST
2718         ;;
2719         --help|-h) show_help
2720         ;;
2721         *)
2722             optname="${opt%%=*}"
2723             optname="${optname#--}"
2724             optname=$(echo "$optname" | sed 's/-/_/g')
2725             if is_in $optname $CMDLINE_SET; then
2726                 eval $optname='$optval'
2727             elif is_in $optname $CMDLINE_APPEND; then
2728                 append $optname "$optval"
2729             else
2730                 die_unknown $opt
2731             fi
2732         ;;
2733     esac
2734 done
2735
2736 for e in $env; do
2737     eval "export $e"
2738 done
2739
2740 disabled logging && logfile=/dev/null
2741
2742 # Disable all the library-specific components if the library itself
2743 # is disabled, see AVCODEC_LIST and following _LIST variables.
2744
2745 disable_components(){
2746     disabled ${1} && disable $(
2747         eval components="\$$(toupper ${1})_COMPONENTS"
2748         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2749     )
2750 }
2751
2752 map 'disable_components $v' $LIBRARY_LIST
2753
2754 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2755 set >> $logfile
2756
2757 case "$toolchain" in
2758     *-asan)
2759         cc_default="${toolchain%-asan}"
2760         add_cflags  -fsanitize=address
2761         add_ldflags -fsanitize=address
2762     ;;
2763     *-msan)
2764         cc_default="${toolchain%-msan}"
2765         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2766         add_ldflags -fsanitize=memory
2767     ;;
2768     *-tsan)
2769         cc_default="${toolchain%-tsan}"
2770         add_cflags  -fsanitize=thread -pie
2771         add_ldflags -fsanitize=thread -pie
2772         case "$toolchain" in
2773             gcc-tsan)
2774                 add_cflags  -fPIC
2775                 add_ldflags -fPIC
2776                 ;;
2777         esac
2778     ;;
2779     *-usan)
2780         cc_default="${toolchain%-usan}"
2781         add_cflags  -fsanitize=undefined
2782         add_ldflags -fsanitize=undefined
2783         case "$toolchain" in
2784             clang-usan)
2785                 add_cflags -O1
2786                 ;;
2787         esac
2788     ;;
2789     valgrind-*)
2790         target_exec_default="valgrind"
2791         case "$toolchain" in
2792             valgrind-massif)
2793                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2794                 ;;
2795             valgrind-memcheck)
2796                 target_exec_args="--track-origins=yes --leak-check=full"
2797                 ;;
2798         esac
2799     ;;
2800     msvc)
2801         # Check whether the current MSVC version needs the C99 converter.
2802         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2803         # support enough of C99 to build libav. Default to the new
2804         # behaviour if the regexp was unable to match anything, since this
2805         # successfully parses the version number of existing supported
2806         # versions that require the converter (MSVC 2010 and 2012).
2807         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2808         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2809             cc_default="cl"
2810         else
2811             cc_default="c99wrap cl"
2812         fi
2813         ld_default="$source_path/compat/windows/mslink"
2814         nm_default="dumpbin -symbols"
2815         ar_default="lib"
2816         case "$arch" in
2817         arm*)
2818             as_default="armasm"
2819             ;;
2820         esac
2821         target_os_default="win32"
2822         # Use a relative path for TMPDIR. This makes sure all the
2823         # ffconf temp files are written with a relative path, avoiding
2824         # issues with msys/win32 path conversion for MSVC parameters
2825         # such as -Fo<file> or -out:<file>.
2826         TMPDIR=.
2827     ;;
2828     icl)
2829         cc_default="icl"
2830         ld_default="xilink"
2831         nm_default="dumpbin -symbols"
2832         ar_default="xilib"
2833         target_os_default="win32"
2834         TMPDIR=.
2835     ;;
2836     gcov)
2837         add_cflags  -fprofile-arcs -ftest-coverage
2838         add_ldflags -fprofile-arcs -ftest-coverage
2839     ;;
2840     llvm-cov)
2841         add_cflags -fprofile-arcs -ftest-coverage
2842         add_ldflags --coverage
2843     ;;
2844     hardened)
2845         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2846         add_cflags   -fno-strict-overflow -fstack-protector-all
2847         add_ldflags  -Wl,-z,relro -Wl,-z,now
2848     ;;
2849     ?*)
2850         die "Unknown toolchain $toolchain"
2851     ;;
2852 esac
2853
2854 test -n "$cross_prefix" && enable cross_compile
2855
2856 if enabled cross_compile; then
2857     test -n "$arch" && test -n "$target_os" ||
2858         die "Must specify target arch and OS when cross-compiling"
2859 fi
2860
2861 ar_default="${cross_prefix}${ar_default}"
2862 cc_default="${cross_prefix}${cc_default}"
2863 occ_default="${cross_prefix}${occ_default}"
2864 nm_default="${cross_prefix}${nm_default}"
2865 pkg_config_default="${cross_prefix}${pkg_config_default}"
2866 ranlib="${cross_prefix}${ranlib}"
2867 strip="${cross_prefix}${strip}"
2868
2869 sysinclude_default="${sysroot}/usr/include"
2870
2871 set_default arch cc pkg_config sysinclude target_exec target_os
2872 enabled cross_compile || host_cc_default=$cc
2873 set_default host_cc
2874
2875 if ! $pkg_config --version >/dev/null 2>&1; then
2876     warn "$pkg_config not found, library detection may fail."
2877     pkg_config=false
2878 fi
2879
2880 exesuf() {
2881     case $1 in
2882         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2883     esac
2884 }
2885
2886 EXESUF=$(exesuf $target_os)
2887 HOSTEXESUF=$(exesuf $host_os)
2888
2889 # set temporary file name
2890 : ${TMPDIR:=$TEMPDIR}
2891 : ${TMPDIR:=$TMP}
2892 : ${TMPDIR:=/tmp}
2893
2894 if ! check_cmd mktemp -u XXXXXX; then
2895     # simple replacement for missing mktemp
2896     # NOT SAFE FOR GENERAL USE
2897     mktemp(){
2898         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2899     }
2900 fi
2901
2902 tmpfile(){
2903     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2904         (set -C; exec > $tmp) 2>/dev/null ||
2905         die "Unable to create temporary file in $TMPDIR."
2906     append TMPFILES $tmp
2907     eval $1=$tmp
2908 }
2909
2910 trap 'rm -f -- $TMPFILES' EXIT
2911
2912 tmpfile TMPASM .asm
2913 tmpfile TMPC   .c
2914 tmpfile TMPE   $EXESUF
2915 tmpfile TMPH   .h
2916 tmpfile TMPO   .o
2917 tmpfile TMPS   .S
2918 tmpfile TMPSH  .sh
2919 tmpfile TMPV   .ver
2920
2921 unset -f mktemp
2922
2923 chmod +x $TMPE
2924
2925 # make sure we can execute files in $TMPDIR
2926 cat > $TMPSH 2>> $logfile <<EOF
2927 #! /bin/sh
2928 EOF
2929 chmod +x $TMPSH >> $logfile 2>&1
2930 if ! $TMPSH >> $logfile 2>&1; then
2931     cat <<EOF
2932 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2933 variable to another directory and make sure that it is not mounted noexec.
2934 EOF
2935     die "Sanity test failed."
2936 fi
2937
2938 armasm_flags(){
2939     for flag; do
2940         case $flag in
2941             # Filter out MSVC cl.exe options from cflags that shouldn't
2942             # be passed to gas-preprocessor
2943             -M[TD]*)                                            ;;
2944             *)                  echo $flag                      ;;
2945         esac
2946    done
2947 }
2948
2949 ccc_flags(){
2950     for flag; do
2951         case $flag in
2952             -std=c99)           echo -c99                       ;;
2953             -mcpu=*)            echo -arch ${flag#*=}           ;;
2954             -mieee)             echo -ieee                      ;;
2955             -O*|-fast)          echo $flag                      ;;
2956             -fno-math-errno)    echo -assume nomath_errno       ;;
2957             -g)                 echo -g3                        ;;
2958             -Wall)              echo -msg_enable level2         ;;
2959             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2960             -Wl,*)              echo $flag                      ;;
2961             -f*|-W*)                                            ;;
2962             *)                  echo $flag                      ;;
2963         esac
2964    done
2965 }
2966
2967 cparser_flags(){
2968     for flag; do
2969         case $flag in
2970             -Wno-switch)             echo -Wno-switch-enum ;;
2971             -Wno-format-zero-length) ;;
2972             -Wdisabled-optimization) ;;
2973             -Wno-pointer-sign)       echo -Wno-other ;;
2974             *)                       echo $flag ;;
2975         esac
2976     done
2977 }
2978
2979 msvc_common_flags(){
2980     for flag; do
2981         case $flag in
2982             # In addition to specifying certain flags under the compiler
2983             # specific filters, they must be specified here as well or else the
2984             # generic catch all at the bottom will print the original flag.
2985             -Wall)                ;;
2986             -std=c99)             ;;
2987             # Common flags
2988             -fomit-frame-pointer) ;;
2989             -g)                   echo -Z7 ;;
2990             -fno-math-errno)      ;;
2991             -fno-common)          ;;
2992             -fno-signed-zeros)    ;;
2993             -fPIC)                ;;
2994             -mthumb)              ;;
2995             -march=*)             ;;
2996             -lz)                  echo zlib.lib ;;
2997             -lavifil32)           echo vfw32.lib ;;
2998             -lavicap32)           echo vfw32.lib user32.lib ;;
2999             -lx264)               echo libx264.lib ;;
3000             -l*)                  echo ${flag#-l}.lib ;;
3001             -L*)                  echo -libpath:${flag#-L} ;;
3002             *)                    echo $flag ;;
3003         esac
3004     done
3005 }
3006
3007 msvc_flags(){
3008     msvc_common_flags "$@"
3009     for flag; do
3010         case $flag in
3011             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3012                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3013                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3014                                        -wd4273 -wd4554 -wd4701 ;;
3015         esac
3016     done
3017 }
3018
3019 icl_flags(){
3020     msvc_common_flags "$@"
3021     for flag; do
3022         case $flag in
3023             # Despite what Intel's documentation says -Wall, which is supported
3024             # on Windows, does enable remarks so disable them here.
3025             -Wall)                echo $flag -Qdiag-disable:remark ;;
3026             -std=c99)             echo -Qstd=c99 ;;
3027         esac
3028     done
3029 }
3030
3031 pgi_flags(){
3032     for flag; do
3033         case $flag in
3034             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3035             -fomit-frame-pointer) echo -Mnoframe ;;
3036             -g)                   echo -gopt ;;
3037             *)                    echo $flag ;;
3038         esac
3039     done
3040 }
3041
3042 suncc_flags(){
3043     for flag; do
3044         case $flag in
3045             -march=*|-mcpu=*)
3046                 case "${flag#*=}" in
3047                     native)                   echo -xtarget=native       ;;
3048                     v9|niagara)               echo -xarch=sparc          ;;
3049                     ultrasparc)               echo -xarch=sparcvis       ;;
3050                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3051                     i586|pentium)             echo -xchip=pentium        ;;
3052                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3053                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3054                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3055                     pentium4*)          echo -xtarget=pentium4           ;;
3056                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3057                     *-sse3)             echo -xarch=sse3                 ;;
3058                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3059                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3060                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3061                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3062                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3063                     k8|opteron|athlon64|athlon-fx)
3064                                                echo -xarch=sse2a         ;;
3065                     athlon*)                   echo -xarch=pentium_proa  ;;
3066                 esac
3067                 ;;
3068             -std=c99)             echo -xc99              ;;
3069             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3070             -fPIC)                echo -KPIC -xcode=pic32 ;;
3071             -W*,*)                echo $flag              ;;
3072             -f*-*|-W*|-mimpure-text)                      ;;
3073             -shared)              echo -G                 ;;
3074             *)                    echo $flag              ;;
3075         esac
3076     done
3077 }
3078
3079 tms470_flags(){
3080     for flag; do
3081         case $flag in
3082             -march=*|-mcpu=*)
3083                 case "${flag#*=}" in
3084                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3085                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3086                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3087                     armv6*|arm11*)          echo -mv=6   ;;
3088                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3089                                             echo -mv=5e  ;;
3090                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3091                 esac
3092                 ;;
3093             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3094             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3095             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3096             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3097             -msoft-float)   echo --float_support=vfplib       ;;
3098             -O[0-3]|-mf=*)  echo $flag                        ;;
3099             -g)             echo -g -mn                       ;;
3100             -pds=*)         echo $flag                        ;;
3101             -D*|-I*)        echo $flag                        ;;
3102             --gcc|--abi=*)  echo $flag                        ;;
3103             -me)            echo $flag                        ;;
3104         esac
3105     done
3106 }
3107
3108 probe_cc(){
3109     pfx=$1
3110     _cc=$2
3111
3112     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3113     unset _ld_o _ldflags _ld_lib _ld_path
3114     unset _depflags _DEPCMD _DEPFLAGS
3115     _flags_filter=echo
3116
3117     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3118         _type=llvm_gcc
3119         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3120         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3121         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3122         _cflags_speed='-O3'
3123         _cflags_size='-Os'
3124     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3125         _type=gcc
3126         gcc_version=$($_cc --version | head -n1)
3127         gcc_basever=$($_cc -dumpversion)
3128         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3129         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3130         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3131         if ! $_cc -dumpversion | grep -q '^2\.'; then
3132             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3133         fi
3134         _cflags_speed='-O3'
3135         _cflags_size='-Os'
3136     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3137         _type=icc
3138         _ident=$($_cc --version | head -n1)
3139         _depflags='-MMD'
3140         _cflags_speed='-O3'
3141         _cflags_size='-Os'
3142         _cflags_noopt='-O1'
3143     elif $_cc -v 2>&1 | grep -q xlc; then
3144         _type=xlc
3145         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3146         _cflags_speed='-O5'
3147         _cflags_size='-O5 -qcompact'
3148     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3149         _type=ccc
3150         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3151         _DEPFLAGS='-M'
3152         _cflags_speed='-fast'
3153         _cflags_size='-O1'
3154         _flags_filter=ccc_flags
3155     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3156         test -d "$sysroot" || die "No valid sysroot specified."
3157         _type=armcc
3158         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3159         armcc_conf="$PWD/armcc.conf"
3160         $_cc --arm_linux_configure                 \
3161              --arm_linux_config_file="$armcc_conf" \
3162              --configure_sysroot="$sysroot"        \
3163              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3164              die "Error creating armcc configuration file."
3165         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3166         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3167         as_default="${cross_prefix}gcc"
3168         _depflags='-MMD'
3169         _cflags_speed='-O3'
3170         _cflags_size='-Os'
3171     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3172         _type=tms470
3173         _ident=$($_cc -version | head -n1 | tr -s ' ')
3174         _flags='--gcc --abi=eabi -me'
3175         _cc_e='-ppl -fe=$@'
3176         _cc_o='-fe=$@'
3177         _depflags='-ppa -ppd=$(@:.o=.d)'
3178         _cflags_speed='-O3 -mf=5'
3179         _cflags_size='-O3 -mf=2'
3180         _flags_filter=tms470_flags
3181     elif $_cc -v 2>&1 | grep -q clang; then
3182         _type=clang
3183         _ident=$($_cc --version 2>/dev/null | head -n1)
3184         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3185         _cflags_speed='-O3'
3186         _cflags_size='-Os'
3187     elif $_cc -V 2>&1 | grep -q Sun; then
3188         _type=suncc
3189         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3190         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3191         _DEPFLAGS='-xM1 -xc99'
3192         _ldflags='-std=c99'
3193         _cflags_speed='-O5'
3194         _cflags_size='-O5 -xspace'
3195         _flags_filter=suncc_flags
3196     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3197         _type=pathscale
3198         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3199         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3200         _cflags_speed='-O2'
3201         _cflags_size='-Os'
3202         _flags_filter='filter_out -Wdisabled-optimization'
3203     elif $_cc -v 2>&1 | grep -q Open64; then
3204         _type=open64
3205         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3206         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3207         _cflags_speed='-O2'
3208         _cflags_size='-Os'
3209         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3210     elif $_cc -V 2>&1 | grep -q Portland; then
3211         _type=pgi
3212         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3213         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3214         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3215         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3216         _cflags_noopt="-O1"
3217         _flags_filter=pgi_flags
3218     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3219         _type=armasm
3220         _ident=$($_cc | head -n1)
3221         # 4509: "This form of conditional instruction is deprecated"
3222         _flags="-nologo -ignore 4509"
3223         _flags_filter=armasm_flags
3224     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3225         _type=msvc
3226         _ident=$($_cc 2>&1 | head -n1)
3227         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3228         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3229         _cflags_speed="-O2"
3230         _cflags_size="-O1"
3231         if $_cc -nologo- 2>&1 | grep -q Linker; then
3232             _ld_o='-out:$@'
3233         else
3234             _ld_o='-Fe$@'
3235         fi
3236         _cc_o='-Fo$@'
3237         _cc_e='-P -Fi$@'
3238         _flags_filter=msvc_flags
3239         _ld_lib='lib%.a'
3240         _ld_path='-libpath:'
3241         _flags='-nologo'
3242         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3243     elif $_cc 2>&1 | grep -q Intel; then
3244         _type=icl
3245         _ident=$($_cc 2>&1 | head -n1)
3246         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3247         # Not only is O3 broken on 13.x+ but it is slower on all previous
3248         # versions (tested) as well.
3249         _cflags_speed="-O2"
3250         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3251         if $_cc 2>&1 | grep -q Linker; then
3252             _ld_o='-out:$@'
3253         else
3254             _ld_o='-Fe$@'
3255         fi
3256         _cc_o='-Fo$@'
3257         _cc_e='-P'
3258         _flags_filter=icl_flags
3259         _ld_lib='lib%.a'
3260         _ld_path='-libpath:'
3261         # -Qdiag-error to make icl error when seeing certain unknown arguments
3262         _flags='-nologo -Qdiag-error:4044,10157'
3263         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3264         # with MSVC which enables it by default.
3265         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3266     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3267         _type=cparser
3268         _ident=$($_cc --version | head -n1)
3269         _depflags='-MMD'
3270         _cflags_speed='-O4'
3271         _cflags_size='-O2'
3272         _flags_filter=cparser_flags
3273     fi
3274
3275     eval ${pfx}_type=\$_type
3276     eval ${pfx}_ident=\$_ident
3277 }
3278
3279 set_ccvars(){
3280     eval ${1}_C=\${_cc_c-\${${1}_C}}
3281     eval ${1}_E=\${_cc_e-\${${1}_E}}
3282     eval ${1}_O=\${_cc_o-\${${1}_O}}
3283
3284     if [ -n "$_depflags" ]; then
3285         eval ${1}_DEPFLAGS=\$_depflags
3286     else
3287         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3288         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3289         eval DEP${1}FLAGS=\$_flags
3290     fi
3291 }
3292
3293 probe_cc cc "$cc"
3294 cflags_filter=$_flags_filter
3295 cflags_speed=$_cflags_speed
3296 cflags_size=$_cflags_size
3297 cflags_noopt=$_cflags_noopt
3298 add_cflags $_flags $_cflags
3299 cc_ldflags=$_ldflags
3300 set_ccvars CC
3301
3302 probe_cc hostcc "$host_cc"
3303 host_cflags_filter=$_flags_filter
3304 add_host_cflags  $_flags $_cflags
3305 set_ccvars HOSTCC
3306
3307 test -n "$cc_type" && enable $cc_type ||
3308     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3309
3310 : ${as_default:=$cc}
3311 : ${objcc_default:=$cc}
3312 : ${dep_cc_default:=$cc}
3313 : ${ld_default:=$cc}
3314 : ${host_ld_default:=$host_cc}
3315 set_default ar as objcc dep_cc ld host_ld
3316
3317 probe_cc as "$as"
3318 asflags_filter=$_flags_filter
3319 add_asflags $_flags $_cflags
3320 set_ccvars AS
3321
3322 probe_cc objcc "$objcc"
3323 objcflags_filter=$_flags_filter
3324 add_objcflags $_flags $_cflags
3325 set_ccvars OBJC
3326
3327 probe_cc ld "$ld"
3328 ldflags_filter=$_flags_filter
3329 add_ldflags $_flags $_ldflags
3330 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3331 LD_O=${_ld_o-$LD_O}
3332 LD_LIB=${_ld_lib-$LD_LIB}
3333 LD_PATH=${_ld_path-$LD_PATH}
3334
3335 probe_cc hostld "$host_ld"
3336 host_ldflags_filter=$_flags_filter
3337 add_host_ldflags $_flags $_ldflags
3338 HOSTLD_O=${_ld_o-$HOSTLD_O}
3339
3340 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3341     probe_cc depcc "$dep_cc"
3342     CCDEP=${_DEPCMD:-$DEPCMD}
3343     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3344     DEPCCFLAGS=$_flags
3345 fi
3346
3347 if $ar 2>&1 | grep -q Microsoft; then
3348     arflags="-nologo"
3349     ar_o='-out:$@'
3350 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3351     arflags="rq"
3352     ar_o='$@'
3353 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3354     arflags='-Xany -r -c'
3355     ar_o='$@'
3356 else
3357     arflags="rc"
3358     ar_o='$@'
3359 fi
3360
3361 add_cflags $extra_cflags
3362 add_objcflags $extra_objcflags
3363 add_asflags $extra_cflags
3364
3365 if test -n "$sysroot"; then
3366     case "$cc_type" in
3367         gcc|llvm_gcc|clang)
3368             add_cppflags --sysroot="$sysroot"
3369             add_ldflags --sysroot="$sysroot"
3370         ;;
3371         tms470)
3372             add_cppflags -I"$sysinclude"
3373             add_ldflags  --sysroot="$sysroot"
3374         ;;
3375     esac
3376 fi
3377
3378 if test "$cpu" = host; then
3379     enabled cross_compile &&
3380         die "--cpu=host makes no sense when cross-compiling."
3381
3382     case "$cc_type" in
3383         gcc|llvm_gcc)
3384             check_native(){
3385                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3386                 sed -n "/cc1.*$1=/{
3387                             s/.*$1=\\([^ ]*\\).*/\\1/
3388                             p
3389                             q
3390                         }" $TMPE
3391             }
3392             cpu=$(check_native -march || check_native -mcpu)
3393         ;;
3394     esac
3395
3396     test "${cpu:-host}" = host &&
3397         die "--cpu=host not supported with compiler $cc"
3398 fi
3399
3400 # Deal with common $arch aliases
3401 case "$arch" in
3402     aarch64|arm64)
3403         arch="aarch64"
3404     ;;
3405     arm*)
3406         arch="arm"
3407     ;;
3408     mips*|IP*)
3409         case "$arch" in
3410         *el)
3411             add_cppflags -EL
3412             add_ldflags -EL
3413         ;;
3414         *eb)
3415             add_cppflags -EB
3416             add_ldflags -EB
3417         ;;
3418         esac
3419         arch="mips"
3420     ;;
3421     parisc*|hppa*)
3422         arch="parisc"
3423     ;;
3424     "Power Macintosh"|ppc*|powerpc*)
3425         arch="ppc"
3426     ;;
3427     s390|s390x)
3428         arch="s390"
3429     ;;
3430     sh4|sh)
3431         arch="sh4"
3432     ;;
3433     sun4u|sparc*)
3434         arch="sparc"
3435     ;;
3436     tilegx|tile-gx)
3437         arch="tilegx"
3438     ;;
3439     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3440         arch="x86"
3441     ;;
3442 esac
3443
3444 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3445 enable $arch
3446
3447 # Add processor-specific flags
3448 if enabled aarch64; then
3449
3450     case $cpu in
3451         armv*)
3452             cpuflags="-march=$cpu"
3453         ;;
3454         *)
3455             cpuflags="-mcpu=$cpu"
3456         ;;
3457     esac
3458
3459 elif enabled alpha; then
3460
3461     cpuflags="-mcpu=$cpu"
3462
3463 elif enabled arm; then
3464
3465     check_arm_arch() {
3466         check_cpp_condition stddef.h \
3467             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3468             $cpuflags
3469     }
3470
3471     probe_arm_arch() {
3472         if   check_arm_arch 4;        then echo armv4
3473         elif check_arm_arch 4T;       then echo armv4t
3474         elif check_arm_arch 5;        then echo armv5
3475         elif check_arm_arch 5E;       then echo armv5e
3476         elif check_arm_arch 5T;       then echo armv5t
3477         elif check_arm_arch 5TE;      then echo armv5te
3478         elif check_arm_arch 5TEJ;     then echo armv5te
3479         elif check_arm_arch 6;        then echo armv6
3480         elif check_arm_arch 6J;       then echo armv6j
3481         elif check_arm_arch 6K;       then echo armv6k
3482         elif check_arm_arch 6Z;       then echo armv6z
3483         elif check_arm_arch 6ZK;      then echo armv6zk
3484         elif check_arm_arch 6T2;      then echo armv6t2
3485         elif check_arm_arch 7;        then echo armv7
3486         elif check_arm_arch 7A  7_A;  then echo armv7-a
3487         elif check_arm_arch 7S;       then echo armv7-a
3488         elif check_arm_arch 7R  7_R;  then echo armv7-r
3489         elif check_arm_arch 7M  7_M;  then echo armv7-m
3490         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3491         elif check_arm_arch 8A  8_A;  then echo armv8-a
3492         fi
3493     }
3494
3495     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3496
3497     case $cpu in
3498         armv*)
3499             cpuflags="-march=$cpu"
3500             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3501         ;;
3502         *)
3503             cpuflags="-mcpu=$cpu"
3504             case $cpu in
3505                 cortex-a*)                               subarch=armv7a  ;;
3506                 cortex-r*)                               subarch=armv7r  ;;
3507                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3508                 arm11*)                                  subarch=armv6   ;;
3509                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3510                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3511                 *)                             subarch=$(probe_arm_arch) ;;
3512             esac
3513         ;;
3514     esac
3515
3516     case "$subarch" in
3517         armv5t*)    enable fast_clz                ;;
3518         armv[6-8]*) enable fast_clz fast_unaligned ;;
3519     esac
3520
3521 elif enabled avr32; then
3522
3523     case $cpu in
3524         ap7[02]0[0-2])
3525             subarch="avr32_ap"
3526             cpuflags="-mpart=$cpu"
3527         ;;
3528         ap)
3529             subarch="avr32_ap"
3530             cpuflags="-march=$cpu"
3531         ;;
3532         uc3[ab]*)
3533             subarch="avr32_uc"
3534             cpuflags="-mcpu=$cpu"
3535         ;;
3536         uc)
3537             subarch="avr32_uc"
3538             cpuflags="-march=$cpu"
3539         ;;
3540     esac
3541
3542 elif enabled bfin; then
3543
3544     cpuflags="-mcpu=$cpu"
3545
3546 elif enabled mips; then
3547
3548     cpuflags="-march=$cpu"
3549
3550 elif enabled ppc; then
3551
3552     disable ldbrx
3553
3554     case $(tolower $cpu) in
3555         601|ppc601|powerpc601)
3556             cpuflags="-mcpu=601"
3557             disable altivec
3558         ;;
3559         603*|ppc603*|powerpc603*)
3560             cpuflags="-mcpu=603"
3561             disable altivec
3562         ;;
3563         604*|ppc604*|powerpc604*)
3564             cpuflags="-mcpu=604"
3565             disable altivec
3566         ;;
3567         g3|75*|ppc75*|powerpc75*)
3568             cpuflags="-mcpu=750"
3569             disable altivec
3570         ;;
3571         g4|745*|ppc745*|powerpc745*)
3572             cpuflags="-mcpu=7450"
3573             disable vsx
3574         ;;
3575         74*|ppc74*|powerpc74*)
3576             cpuflags="-mcpu=7400"
3577             disable vsx
3578         ;;
3579         g5|970|ppc970|powerpc970)
3580             cpuflags="-mcpu=970"
3581             disable vsx
3582         ;;
3583         power[3-6]*)
3584             cpuflags="-mcpu=$cpu"
3585             disable vsx
3586         ;;
3587         power[7-8]*)
3588             cpuflags="-mcpu=$cpu"
3589             enable ldbrx
3590         ;;
3591         cell)
3592             cpuflags="-mcpu=cell"
3593             enable ldbrx
3594             disable vsx
3595         ;;
3596         e500mc)
3597             cpuflags="-mcpu=e500mc"
3598             disable altivec
3599         ;;
3600         e500v2)
3601             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3602             disable altivec
3603             disable dcbzl
3604         ;;
3605         e500)
3606             cpuflags="-mcpu=8540 -mhard-float"
3607             disable altivec
3608             disable dcbzl
3609         ;;
3610     esac
3611
3612 elif enabled sparc; then
3613
3614     case $cpu in
3615         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3616             cpuflags="-mcpu=$cpu"
3617         ;;
3618         ultrasparc*|niagara[234])
3619             cpuflags="-mcpu=$cpu"
3620         ;;
3621     esac
3622
3623 elif enabled x86; then
3624
3625     case $cpu in
3626         i[345]86|pentium)
3627             cpuflags="-march=$cpu"
3628             disable i686
3629             disable mmx
3630         ;;
3631         # targets that do NOT support nopl and conditional mov (cmov)
3632         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3633             cpuflags="-march=$cpu"
3634             disable i686
3635         ;;
3636         # targets that do support nopl and conditional mov (cmov)
3637         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3638             cpuflags="-march=$cpu"
3639             enable i686
3640             enable fast_cmov
3641         ;;
3642         # targets that do support conditional mov but on which it's slow
3643         pentium4|pentium4m|prescott|nocona)
3644             cpuflags="-march=$cpu"
3645             enable i686
3646             disable fast_cmov
3647         ;;
3648     esac
3649
3650 fi
3651
3652 if [ "$cpu" != generic ]; then
3653     add_cflags  $cpuflags
3654     add_asflags $cpuflags
3655     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3656 fi
3657
3658 # compiler sanity check
3659 check_exec <<EOF
3660 int main(void){ return 0; }
3661 EOF
3662 if test "$?" != 0; then
3663     echo "$cc is unable to create an executable file."
3664     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3665         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3666         echo "Only do this if you know what cross compiling means."
3667     fi
3668     die "C compiler test failed."
3669 fi
3670
3671 add_cppflags -D_ISOC99_SOURCE
3672 check_cflags -std=c99
3673 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3674 #include <stdlib.h>
3675 EOF
3676 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3677 #include <stdlib.h>
3678 EOF
3679
3680 add_host_cppflags -D_ISOC99_SOURCE
3681 check_host_cflags -std=c99
3682 check_host_cflags -Wall
3683 check_host_cflags -O3
3684
3685 check_64bit(){
3686     arch32=$1
3687     arch64=$2
3688     expr=$3
3689     check_code cc "" "int test[2*($expr) - 1]" &&
3690         subarch=$arch64 || subarch=$arch32
3691 }
3692
3693 case "$arch" in
3694     aarch64|alpha|ia64)
3695         spic=$shared
3696     ;;
3697     mips)
3698         check_64bit mips mips64 '_MIPS_SIM > 1'
3699         spic=$shared
3700     ;;
3701     parisc)
3702         check_64bit parisc parisc64 'sizeof(void *) > 4'
3703         spic=$shared
3704     ;;
3705     ppc)
3706         check_64bit ppc ppc64 'sizeof(void *) > 4'
3707         spic=$shared
3708     ;;
3709     s390)
3710         check_64bit s390 s390x 'sizeof(void *) > 4'
3711         spic=$shared
3712     ;;
3713     sparc)
3714         check_64bit sparc sparc64 'sizeof(void *) > 4'
3715         spic=$shared
3716     ;;
3717     x86)
3718         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3719         if test "$subarch" = "x86_64"; then
3720             spic=$shared
3721         fi
3722     ;;
3723 esac
3724
3725 enable $subarch
3726 enabled spic && enable_weak pic
3727
3728 # OS specific
3729 case $target_os in
3730     aix)
3731         SHFLAGS=-shared
3732         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3733         enabled shared && add_ldflags -Wl,-brtl
3734         ;;
3735     android)
3736         disable symver
3737         enable section_data_rel_ro
3738         SLIB_INSTALL_NAME='$(SLIBNAME)'
3739         SLIB_INSTALL_LINKS=
3740         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3741         ;;
3742     haiku)
3743         prefix_default="/boot/common"
3744         network_extralibs="-lnetwork"
3745         host_libs=
3746         ;;
3747     sunos)
3748         SHFLAGS='-shared -Wl,-h,$$(@F)'
3749         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3750         network_extralibs="-lsocket -lnsl"
3751         # When using suncc to build, the Solaris linker will mark
3752         # an executable with each instruction set encountered by
3753         # the Solaris assembler.  As our libraries contain their own
3754         # guards for processor-specific code, instead suppress
3755         # generation of the HWCAPS ELF section on Solaris x86 only.
3756         enabled_all suncc x86 &&
3757             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3758             add_ldflags -Wl,-M,mapfile
3759         nm_default='nm -P -g'
3760         version_script='-M'
3761         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3762         ;;
3763     netbsd)
3764         disable symver
3765         oss_indev_extralibs="-lossaudio"
3766         oss_outdev_extralibs="-lossaudio"
3767         ;;
3768     openbsd|bitrig)
3769         disable symver
3770         SHFLAGS='-shared'
3771         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3772         SLIB_INSTALL_LINKS=
3773         oss_indev_extralibs="-lossaudio"
3774         oss_outdev_extralibs="-lossaudio"
3775         ;;
3776     dragonfly)
3777         disable symver
3778         ;;
3779     freebsd)
3780         ;;
3781     bsd/os)
3782         add_extralibs -lpoll -lgnugetopt
3783         ;;
3784     darwin)
3785         enabled ppc && add_asflags -force_cpusubtype_ALL
3786         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3787         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3788         add_ldflags -Wl,-dynamic,-search_paths_first
3789         SLIBSUF=".dylib"
3790         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3791         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3792         objformat="macho"
3793         enabled x86_64 && objformat="macho64"
3794         enabled_any pic shared ||
3795             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3796         check_header dispatch/dispatch.h &&
3797             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3798         ;;
3799     msys*)
3800         die "Native MSYS builds are discouraged, please use the MINGW environment."
3801         ;;
3802     mingw32*|mingw64*)
3803         if test $target_os = "mingw32ce"; then
3804             disable network
3805         else
3806             target_os=mingw32
3807         fi
3808         LIBTARGET=i386
3809         if enabled x86_64; then
3810             LIBTARGET="i386:x86-64"
3811         elif enabled arm; then
3812             LIBTARGET=arm-wince
3813         fi
3814         check_ldflags -Wl,--nxcompat
3815         check_ldflags -Wl,--dynamicbase
3816         shlibdir_default="$bindir_default"
3817         SLIBPREF=""
3818         SLIBSUF=".dll"
3819         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3820         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3821         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3822         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3823         SLIB_INSTALL_LINKS=
3824         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3825         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3826         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3827         objformat="win32"
3828         dlltool="${cross_prefix}dlltool"
3829         ranlib=:
3830         enable dos_paths
3831         ;;
3832     win32|win64)
3833         disable symver
3834         if enabled shared; then
3835             # Link to the import library instead of the normal static library
3836             # for shared libs.
3837             LD_LIB='%.lib'
3838             # Cannot build both shared and static libs with MSVC or icl.
3839             disable static
3840         fi
3841         shlibdir_default="$bindir_default"
3842         SLIBPREF=""
3843         SLIBSUF=".dll"
3844         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3845         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3846         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3847         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3848         SLIB_INSTALL_LINKS=
3849         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3850         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3851         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3852         objformat="win32"
3853         ranlib=:
3854         enable dos_paths
3855         ;;
3856     cygwin*)
3857         target_os=cygwin
3858         shlibdir_default="$bindir_default"
3859         SLIBPREF="cyg"
3860         SLIBSUF=".dll"
3861         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3862         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3863         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3864         SLIB_INSTALL_LINKS=
3865         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3866         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3867         objformat="win32"
3868         enable dos_paths
3869         ;;
3870     *-dos|freedos|opendos)
3871         network_extralibs="-lsocket"
3872         objformat="coff"
3873         enable dos_paths
3874         add_cppflags -U__STRICT_ANSI__
3875         ;;
3876     linux)
3877         enable dv1394
3878         enable section_data_rel_ro
3879         ;;
3880     irix*)
3881         target_os=irix
3882         ranlib="echo ignoring ranlib"
3883         ;;
3884     os/2*)
3885         ln_s="cp -f"
3886         objformat="aout"
3887         add_cppflags -D_GNU_SOURCE
3888         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3889         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3890         LIBSUF="_s.a"
3891         SLIBPREF=""
3892         SLIBSUF=".dll"
3893         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3894         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3895         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3896             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3897             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3898             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3899             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3900         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3901             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3902         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3903         enable dos_paths
3904         ;;
3905     gnu/kfreebsd)
3906         add_cppflags -D_BSD_SOURCE
3907         ;;
3908     gnu)
3909         ;;
3910     qnx)
3911         add_cppflags -D_QNX_SOURCE
3912         network_extralibs="-lsocket"
3913         ;;
3914     symbian)
3915         SLIBSUF=".dll"
3916         enable dos_paths
3917         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3918         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3919         add_ldflags -Wl,--target1-abs,--no-undefined \
3920                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3921                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3922         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3923                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3924                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3925         ;;
3926     osf1)
3927         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3928         ;;
3929     minix)
3930         ;;
3931     plan9)
3932         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3933                      -D_REENTRANT_SOURCE        \
3934                      -D_RESEARCH_SOURCE         \
3935                      -DFD_SETSIZE=96            \
3936                      -DHAVE_SOCK_OPTS
3937         add_compat strtod.o strtod=avpriv_strtod
3938         network_extralibs='-lbsd'
3939         exeobjs=compat/plan9/main.o
3940         cp_f='cp'
3941         ;;
3942     none)
3943         ;;
3944     *)
3945         die "Unknown OS '$target_os'."
3946         ;;
3947 esac
3948
3949 # determine libc flavour
3950
3951 probe_libc(){
3952     pfx=$1
3953     pfx_no_=${pfx%_}
3954     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3955     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3956         eval ${pfx}libc_type=uclibc
3957         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3958     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3959         eval ${pfx}libc_type=glibc
3960         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3961     # MinGW headers can be installed on Cygwin, so check for newlib first.
3962     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3963         eval ${pfx}libc_type=newlib
3964         add_${pfx}cppflags -U__STRICT_ANSI__
3965     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3966     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3967         eval ${pfx}libc_type=mingw64
3968         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3969         eval test \$${pfx_no_}cc_type = "gcc" &&
3970             add_${pfx}cppflags -D__printf__=__gnu_printf__
3971     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3972          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3973         eval ${pfx}libc_type=mingw32
3974         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3975             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3976             die "ERROR: MinGW32 runtime version must be >= 3.15."
3977         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3978         eval test \$${pfx_no_}cc_type = "gcc" &&
3979             add_${pfx}cppflags -D__printf__=__gnu_printf__
3980     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3981         eval ${pfx}libc_type=msvcrt
3982         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3983             if [ "$pfx" = host_ ]; then
3984                 add_host_cppflags -Dsnprintf=_snprintf
3985             else
3986                 add_compat strtod.o strtod=avpriv_strtod
3987                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3988                                              _snprintf=avpriv_snprintf  \
3989                                              vsnprintf=avpriv_vsnprintf
3990             fi
3991         fi
3992         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3993         # 0x601 by default unless something else is set by the user.
3994         # This can easily lead to us detecting functions only present
3995         # in such new versions and producing binaries requiring windows 7.0.
3996         # Therefore explicitly set the default to XP unless the user has
3997         # set something else on the command line.
3998         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3999         # family. For these cases, configure is free to use any functions
4000         # found in the SDK headers by default. (Alternatively, we could force
4001         # _WIN32_WINNT to 0x0602 in that case.)
4002         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4003             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4004 #ifdef WINAPI_FAMILY
4005 #include <winapifamily.h>
4006 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4007 #error not desktop
4008 #endif
4009 #endif
4010 EOF
4011     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4012         eval ${pfx}libc_type=klibc
4013     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4014         eval ${pfx}libc_type=bionic
4015     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4016         eval ${pfx}libc_type=solaris
4017         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4018     else
4019         eval ${pfx}libc_type=default
4020         add_${pfx}cppflags -D_DEFAULT_SOURCE
4021     fi
4022 }
4023
4024 probe_libc
4025 test -n "$libc_type" && enable libc_$libc_type
4026 probe_libc host_
4027 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4028
4029 case $libc_type in
4030     bionic)
4031         add_compat strtod.o strtod=avpriv_strtod
4032         ;;
4033 esac
4034
4035 # hacks for compiler/libc/os combinations
4036
4037 if enabled_all tms470 libc_glibc; then
4038     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4039     add_cppflags -D__USER_LABEL_PREFIX__=
4040     add_cppflags -D__builtin_memset=memset
4041     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4042     add_cflags   -pds=48    # incompatible redefinition of macro
4043 fi
4044
4045 if enabled_all ccc libc_glibc; then
4046     add_ldflags -Wl,-z,now  # calls to libots crash without this
4047 fi
4048
4049 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4050     add_cppflags '-I\$(SRC_PATH)/compat/float'
4051
4052 esc(){
4053     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4054 }
4055
4056 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4057
4058 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4059
4060 set_default $PATHS_LIST
4061 set_default nm
4062
4063 # we need to build at least one lib type
4064 if ! enabled_any static shared; then
4065     cat <<EOF
4066 At least one library type must be built.
4067 Specify --enable-static to build the static libraries or --enable-shared to
4068 build the shared libraries as well. To only build the shared libraries specify
4069 --disable-static in addition to --enable-shared.
4070 EOF
4071     exit 1
4072 fi
4073
4074 die_license_disabled() {
4075     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4076 }
4077
4078 die_license_disabled gpl libcdio
4079 die_license_disabled gpl libx264
4080 die_license_disabled gpl libx265
4081 die_license_disabled gpl libxavs
4082 die_license_disabled gpl libxvid
4083 die_license_disabled gpl x11grab
4084
4085 die_license_disabled nonfree cuda
4086 die_license_disabled nonfree libfaac
4087 die_license_disabled nonfree libfdk_aac
4088 die_license_disabled nonfree libnpp
4089 die_license_disabled nonfree openssl
4090
4091 die_license_disabled version3 libopencore_amrnb
4092 die_license_disabled version3 libopencore_amrwb
4093 die_license_disabled version3 libvo_aacenc
4094 die_license_disabled version3 libvo_amrwbenc
4095
4096 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4097
4098 disabled optimizations || check_cflags -fomit-frame-pointer
4099
4100 enable_weak_pic() {
4101     disabled pic && return
4102     enable pic
4103     add_cppflags -DPIC
4104     case "$target_os" in
4105     mingw*|cygwin*)
4106         ;;
4107     *)
4108         add_cflags -fPIC
4109         ;;
4110     esac
4111     add_asflags  -fPIC
4112 }
4113
4114 enabled pic && enable_weak_pic
4115
4116 check_cc <<EOF || die "Symbol mangling check failed."
4117 int ff_extern;
4118 EOF
4119 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4120 extern_prefix=${sym%%ff_extern*}
4121
4122 check_cc <<EOF && enable_weak inline_asm
4123 void foo(void) { __asm__ volatile ("" ::); }
4124 EOF
4125
4126 _restrict=
4127 for restrict_keyword in restrict __restrict__ __restrict; do
4128     check_cc <<EOF && _restrict=$restrict_keyword && break
4129 void foo(char * $restrict_keyword p);
4130 EOF
4131 done
4132
4133 check_cc <<EOF && enable pragma_deprecated
4134 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4135 EOF
4136
4137 check_cc <<EOF && enable attribute_packed
4138 struct { int x; } __attribute__((packed)) x;
4139 EOF
4140
4141 check_cc <<EOF && enable attribute_may_alias
4142 union { int x; } __attribute__((may_alias)) x;
4143 EOF
4144
4145 check_cc <<EOF || die "endian test failed"
4146 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4147 EOF
4148 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4149
4150 check_gas() {
4151     log "check_gas using '$as' as AS"
4152     # :vararg is used on aarch64, arm and ppc altivec
4153     check_as <<EOF || return 1
4154 .macro m n, y:vararg=0
4155 \n: .int \y
4156 .endm
4157 m x
4158 EOF
4159     # .altmacro is only used in arm asm
4160     ! enabled arm || check_as <<EOF || return 1
4161 .altmacro
4162 EOF
4163     enable gnu_as
4164     return 0
4165 }
4166
4167 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4168     nogas=:
4169     enabled_any arm aarch64 && nogas=die
4170     enabled_all ppc altivec && nogas=warn
4171     as_noop=-v
4172
4173     case $as_type in
4174         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4175         gcc)  gaspp_as_type=gas ;;
4176         *)    gaspp_as_type=$as_type ;;
4177     esac
4178
4179     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4180
4181     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4182         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4183
4184     if ! check_gas ; then
4185         as=${gas:=$as}
4186         check_gas || \
4187             $nogas "GNU assembler not found, install/update gas-preprocessor"
4188     fi
4189
4190     check_as <<EOF && enable as_func
4191 .func test
4192 .endfunc
4193 EOF
4194 fi
4195
4196 check_inline_asm inline_asm_labels '"1:\n"'
4197
4198 if enabled aarch64; then
4199     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4200     # internal assembler in clang 3.3 does not support this instruction
4201     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4202     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4203
4204     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4205
4206 elif enabled alpha; then
4207
4208     check_cflags -mieee
4209
4210 elif enabled arm; then
4211
4212     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4213     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4214     enabled thumb && check_cflags -mthumb || check_cflags -marm
4215
4216     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4217         enable vfp_args
4218     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4219         enable vfp_args
4220     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4221         case "${cross_prefix:-$cc}" in
4222             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4223             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4224 __asm__ (".eabi_attribute 28, 1");
4225 int main(void) { return 0; }
4226 EOF
4227         esac
4228         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4229     fi
4230
4231     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4232     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4233     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4234     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4235     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4236     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4237
4238     [ $target_os = linux ] || [ $target_os = android ] ||
4239         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4240             $ARCH_EXT_LIST_ARM
4241
4242     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4243
4244     check_as <<EOF && enable as_dn_directive
4245 ra .dn d0.i16
4246 .unreq ra
4247 EOF
4248     check_as <<EOF && enable as_fpu_directive
4249 .fpu neon
4250 EOF
4251
4252     # llvm's integrated assembler supports .object_arch from llvm 3.5
4253     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4254 .object_arch armv4
4255 EOF
4256
4257     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4258
4259 elif enabled mips; then
4260
4261     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4262
4263     # make sure that only an instruction set is enabled
4264     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4265
4266     if enabled mips64; then
4267         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4268             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4269                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4270     else
4271         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4272             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4273                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4274     fi
4275
4276 elif enabled parisc; then
4277
4278     if enabled gcc; then
4279         case $($cc -dumpversion) in
4280             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4281         esac
4282     fi
4283
4284 elif enabled ppc; then
4285
4286     enable local_aligned_8 local_aligned_16
4287
4288     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4289     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4290     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4291     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4292
4293     # AltiVec flags: The FSF version of GCC differs from the Apple version
4294     if enabled altivec; then
4295         check_cflags -maltivec -mabi=altivec &&
4296         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4297         check_cflags -faltivec
4298
4299         # check if our compiler supports Motorola AltiVec C API
4300         check_cc <<EOF || disable altivec
4301 $inc_altivec_h
4302 int main(void) {
4303     vector signed int v1 = (vector signed int) { 0 };
4304     vector signed int v2 = (vector signed int) { 1 };
4305     v1 = vec_add(v1, v2);
4306     return 0;
4307 }
4308 EOF
4309
4310         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4311     fi
4312
4313     if enabled vsx; then
4314         check_cflags -mvsx &&
4315         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4316     fi
4317
4318     if enabled power8; then
4319         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4320     fi
4321
4322 elif enabled x86; then
4323
4324     check_builtin rdtsc    intrin.h   "__rdtsc()"
4325     check_builtin mm_empty mmintrin.h "_mm_empty()"
4326
4327     enable local_aligned_8 local_aligned_16
4328
4329     # check whether EBP is available on x86
4330     # As 'i' is stored on the stack, this program will crash
4331     # if the base pointer is used to access it because the
4332     # base pointer is cleared in the inline assembly code.
4333     check_exec_crash <<EOF && enable ebp_available
4334 volatile int i=0;
4335 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4336 return i;
4337 EOF
4338
4339     # check whether EBX is available on x86
4340     check_inline_asm ebx_available '""::"b"(0)' &&
4341         check_inline_asm ebx_available '"":::"%ebx"'
4342
4343     # check whether xmm clobbers are supported
4344     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4345
4346     # check whether binutils is new enough to compile SSSE3/MMXEXT
4347     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4348     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4349
4350     if ! disabled_any asm mmx yasm; then
4351         if check_cmd $yasmexe --version; then
4352             enabled x86_64 && yasm_extra="-m amd64"
4353             yasm_debug="-g dwarf2"
4354         elif check_cmd nasm -v; then
4355             yasmexe=nasm
4356             yasm_debug="-g -F dwarf"
4357             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4358         fi
4359
4360         YASMFLAGS="-f $objformat $yasm_extra"
4361         enabled pic               && append YASMFLAGS "-DPIC"
4362         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4363         case "$objformat" in
4364             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4365         esac
4366
4367         check_yasm "movbe ecx, [5]" && enable yasm ||
4368             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4369         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4370         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4371         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4372         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4373         check_yasm "CPU amdnop" || disable cpunop
4374     fi
4375
4376     case "$cpu" in
4377         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4378             disable fast_clz
4379         ;;
4380     esac
4381
4382 fi
4383
4384 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4385
4386 check_ldflags -Wl,--as-needed
4387
4388 if check_func dlopen; then
4389     ldl=
4390 elif check_func dlopen -ldl; then
4391     ldl=-ldl
4392 fi
4393
4394 if ! disabled network; then
4395     check_func getaddrinfo $network_extralibs
4396     check_func inet_aton $network_extralibs
4397
4398     check_type netdb.h "struct addrinfo"
4399     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4400     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4401     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4402     check_type poll.h "struct pollfd"
4403     check_type netinet/sctp.h "struct sctp_event_subscribe"
4404     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4405     check_type netinet/in.h "struct sockaddr_in6"
4406     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4407     check_type "sys/types.h sys/socket.h" socklen_t
4408
4409     # Prefer arpa/inet.h over winsock2
4410     if check_header arpa/inet.h ; then
4411         check_func closesocket
4412     elif check_header winsock2.h ; then
4413         check_func_headers winsock2.h closesocket -lws2 &&
4414             network_extralibs="-lws2" ||
4415         { check_func_headers winsock2.h closesocket -lws2_32 &&
4416             network_extralibs="-lws2_32"; } || disable winsock2_h network
4417         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4418
4419         check_type ws2tcpip.h socklen_t
4420         check_type ws2tcpip.h "struct addrinfo"
4421         check_type ws2tcpip.h "struct group_source_req"
4422         check_type ws2tcpip.h "struct ip_mreq_source"
4423         check_type ws2tcpip.h "struct ipv6_mreq"
4424         check_type winsock2.h "struct pollfd"
4425         check_struct winsock2.h "struct sockaddr" sa_len
4426         check_type ws2tcpip.h "struct sockaddr_in6"
4427         check_type ws2tcpip.h "struct sockaddr_storage"
4428     else
4429         disable network
4430     fi
4431 fi
4432
4433 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4434 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4435 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4436 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4437
4438 case "$custom_allocator" in
4439     jemalloc)
4440         # jemalloc by default does not use a prefix
4441         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4442     ;;
4443     tcmalloc)
4444         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4445         malloc_prefix=tc_
4446     ;;
4447 esac
4448
4449 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4450 check_func  ${malloc_prefix}memalign            && enable memalign
4451 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4452
4453 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4454     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4455
4456 check_func  fcntl
4457 check_func  fork
4458 check_func  gethrtime
4459 check_func  getopt
4460 check_func  getrusage
4461 check_func  gettimeofday
4462 check_func  gmtime_r
4463 check_func  isatty
4464 check_func  localtime_r
4465 check_func  mach_absolute_time
4466 check_func  mkstemp
4467 check_func  mmap
4468 check_func  mprotect
4469 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4470 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4471 check_func  sched_getaffinity
4472 check_func  setrlimit
4473 check_func  strerror_r
4474 check_func  sysconf
4475 check_func  sysctl
4476 check_func  usleep
4477
4478 check_func_headers io.h setmode
4479 check_func_headers stdlib.h getenv
4480
4481 check_func_headers windows.h CoTaskMemFree -lole32
4482 check_func_headers windows.h GetProcessAffinityMask
4483 check_func_headers windows.h GetProcessTimes
4484 check_func_headers windows.h GetSystemTimeAsFileTime
4485 check_func_headers windows.h LoadLibrary
4486 check_func_headers windows.h MapViewOfFile
4487 check_func_headers windows.h SetConsoleTextAttribute
4488 check_func_headers windows.h Sleep
4489 check_func_headers windows.h VirtualAlloc
4490 check_struct windows.h "CONDITION_VARIABLE" Ptr
4491
4492 check_header direct.h
4493 check_header dlfcn.h
4494 check_header d3d11.h
4495 check_header dxva.h
4496 check_header dxva2api.h
4497 check_header io.h
4498 check_header mach/mach_time.h
4499 check_header malloc.h
4500 check_header poll.h
4501 check_header sys/mman.h
4502 check_header sys/param.h
4503 check_header sys/resource.h
4504 check_header sys/select.h
4505 check_header sys/time.h
4506 check_header sys/un.h
4507 check_header unistd.h
4508 check_header valgrind/valgrind.h
4509 check_header vdpau/vdpau.h
4510 check_header vdpau/vdpau_x11.h
4511 check_header VideoDecodeAcceleration/VDADecoder.h
4512 check_header windows.h
4513 check_header X11/extensions/XvMClib.h
4514
4515 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4516 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4517 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4518
4519 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4520
4521 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4522 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4523 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4524
4525 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4526 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4527 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4528 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4529
4530 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4531
4532 if ! disabled w32threads && ! enabled pthreads; then
4533     check_func_headers "windows.h process.h" _beginthreadex &&
4534         enable w32threads || disable w32threads
4535 fi
4536
4537 # check for some common methods of building with pthread support
4538 # do this before the optional library checks as some of them require pthreads
4539 if ! disabled pthreads && ! enabled w32threads; then
4540     enable pthreads
4541     if check_func pthread_join -pthread; then
4542         add_cflags -pthread
4543         add_extralibs -pthread
4544     elif check_func pthread_join -pthreads; then
4545         add_cflags -pthreads
4546         add_extralibs -pthreads
4547     elif check_func pthread_join -lpthreadGC2; then
4548         add_extralibs -lpthreadGC2
4549     elif check_lib pthread.h pthread_join -lpthread; then
4550         :
4551     elif ! check_func pthread_join; then
4552         disable pthreads
4553     fi
4554 fi
4555
4556 enabled pthreads &&
4557     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4558
4559 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4560 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4561
4562 check_lib math.h sin -lm && LIBM="-lm"
4563 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4564
4565 atan2f_args=2
4566 ldexpf_args=2
4567 powf_args=2
4568
4569 for func in $MATH_FUNCS; do
4570     eval check_mathfunc $func \${${func}_args:-1}
4571 done
4572
4573 # these are off by default, so fail if requested and not available
4574 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4575                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4576                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4577 enabled cuda              && check_lib cuda.h cuInit -lcuda
4578 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4579 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4580 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4581 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4582 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4583 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4584 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4585 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4586 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4587                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4588                                done || die "ERROR: libgsm not found"; }
4589 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4590 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4591 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4592 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4593 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4594 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4595 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4596 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4597 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4598 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4599                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4600 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4601 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4602 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4603 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4604 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4605 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4606 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4607 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4608 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4609 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4610 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4611 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4612     enabled libvpx_vp8_decoder && {
4613         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4614             disable libvpx_vp8_decoder;
4615     }
4616     enabled libvpx_vp8_encoder && {
4617         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4618             disable libvpx_vp8_encoder;
4619     }
4620     enabled libvpx_vp9_decoder && {
4621         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4622             disable libvpx_vp9_decoder;
4623     }
4624     enabled libvpx_vp9_encoder && {
4625         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4626             disable libvpx_vp9_encoder;
4627     }
4628     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4629         die "libvpx enabled but no supported decoders found"
4630     fi
4631 }
4632 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4633 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4634 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4635                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4636                                die "ERROR: libx264 version must be >= 0.118."; } &&
4637                              { check_cpp_condition x264.h "X264_MPEG2" &&
4638                                enable libx262; }
4639 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4640                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4641                                die "ERROR: libx265 version must be >= 57."; }
4642 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4643 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4644 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4645                                 { ! enabled cross_compile && {
4646                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4647                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4648                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4649                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4650                                die "ERROR: mmal not found"; }
4651 enabled mmal && check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"
4652 enabled omx_rpi && enable omx
4653 enabled omx               && { check_header OMX_Core.h ||
4654                                 { ! enabled cross_compile && enabled omx_rpi && {
4655                                     add_cflags -isystem/opt/vc/include/IL ; }
4656                                 check_header OMX_Core.h ; } ||
4657                                die "ERROR: OpenMAX IL headers not found"; }
4658 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4659                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4660                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4661                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4662                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4663                                die "ERROR: openssl not found"; }
4664
4665 if enabled gnutls; then
4666     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4667     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4668 fi
4669
4670 # libdc1394 check
4671 if enabled libdc1394; then
4672     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4673         enable libdc1394_2; } ||
4674     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4675         enable libdc1394_1; } ||
4676     die "ERROR: No version of libdc1394 found "
4677 fi
4678
4679 if enabled nvenc; then
4680     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4681     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6" ||
4682         die "ERROR: NVENC API version 5 or older is not supported"
4683 fi
4684
4685 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4686     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4687     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4688     enable sdl
4689 fi
4690
4691 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4692 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4693
4694 check_header linux/fb.h
4695 check_header linux/videodev2.h
4696 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4697
4698 check_header AVFoundation/AVFoundation.h &&
4699     check_objcflags -fobjc-arc &&
4700     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4701     disable AVFoundation_AVFoundation_h
4702
4703 check_header sys/videoio.h
4704
4705 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4706 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4707 # w32api 3.12 had it defined wrong
4708 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4709
4710 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4711 { check_header dev/bktr/ioctl_meteor.h &&
4712   check_header dev/bktr/ioctl_bt848.h; } ||
4713 { check_header machine/ioctl_meteor.h &&
4714   check_header machine/ioctl_bt848.h; } ||
4715 { check_header dev/video/meteor/ioctl_meteor.h &&
4716   check_header dev/video/bktr/ioctl_bt848.h; } ||
4717 check_header dev/ic/bt8xx.h
4718
4719 check_header sndio.h
4720 check_header sys/soundcard.h
4721 check_header soundcard.h
4722
4723 enabled_any alsa_indev alsa_outdev &&
4724     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4725
4726 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4727     check_func jack_port_get_latency_range -ljack
4728
4729 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4730
4731 if enabled libcdio; then
4732     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4733     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4734     die "ERROR: No usable libcdio/cdparanoia found"
4735 fi
4736
4737 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4738
4739 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4740     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4741         enabled libxcb && die "ERROR: libxcb not found";
4742     } && disable x11grab && enable libxcb
4743
4744     disabled libxcb_shm ||
4745         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4746             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4747         } && check_header sys/shm.h && enable libxcb_shm
4748
4749     disabled libxcb_xfixes ||
4750         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4751             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4752         } && enable libxcb_xfixes
4753
4754     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4755     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4756 fi
4757
4758 if enabled x11grab; then
4759     enabled xlib || die "ERROR: Xlib not found"
4760     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4761     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4762 fi
4763
4764 enabled vaapi &&
4765     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4766     disable vaapi
4767
4768 if enabled vaapi ; then
4769     enabled xlib &&
4770     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4771     enable vaapi_x11
4772
4773     check_lib2 "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4774     enable vaapi_drm
4775 fi
4776
4777 enabled vdpau &&
4778     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4779     disable vdpau
4780
4781 enabled vdpau && enabled xlib &&
4782     check_lib2 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4783     enable vdpau_x11
4784
4785 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4786
4787 # add some useful compiler flags if supported
4788 check_cflags -Wdeclaration-after-statement
4789 check_cflags -Wall
4790 check_cflags -Wdisabled-optimization
4791 check_cflags -Wpointer-arith
4792 check_cflags -Wredundant-decls
4793 check_cflags -Wwrite-strings
4794 check_cflags -Wtype-limits
4795 check_cflags -Wundef
4796 check_cflags -Wmissing-prototypes
4797 check_cflags -Wstrict-prototypes
4798 enabled extra_warnings && check_cflags -Winline
4799 enabled extra_warnings && check_cflags -Wcast-qual
4800
4801 check_disable_warning(){
4802     warning_flag=-W${1#-Wno-}
4803     test_cflags $warning_flag && add_cflags $1
4804 }
4805
4806 check_disable_warning -Wno-parentheses
4807 check_disable_warning -Wno-switch
4808 check_disable_warning -Wno-format-zero-length
4809 check_disable_warning -Wno-pointer-sign
4810
4811 # add some linker flags
4812 check_ldflags -Wl,--warn-common
4813 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4814 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4815 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4816
4817 # add some strip flags