configure: move the hardware accel libs' entries in the help text
[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 EXTERNAL_LIBRARY_LIST="
1223     avisynth
1224     bzlib
1225     frei0r
1226     gnutls
1227     libbs2b
1228     libcdio
1229     libdc1394
1230     libdcadec
1231     libfaac
1232     libfdk_aac
1233     libfontconfig
1234     libfreetype
1235     libgsm
1236     libilbc
1237     libkvazaar
1238     libmp3lame
1239     libnpp
1240     libopencore_amrnb
1241     libopencore_amrwb
1242     libopencv
1243     libopenh264
1244     libopenjpeg
1245     libopus
1246     libpulse
1247     librtmp
1248     libschroedinger
1249     libsnappy
1250     libspeex
1251     libtheora
1252     libtwolame
1253     libvo_aacenc
1254     libvo_amrwbenc
1255     libvorbis
1256     libvpx
1257     libwavpack
1258     libwebp
1259     libx264
1260     libx265
1261     libxavs
1262     libxcb
1263     libxcb_shm
1264     libxcb_xfixes
1265     libxvid
1266     openssl
1267     x11grab
1268     zlib
1269 "
1270
1271 FEATURE_LIST="
1272     gray
1273     hardcoded_tables
1274     omx_rpi
1275     runtime_cpudetect
1276     safe_bitstream_reader
1277     shared
1278     small
1279     sram
1280     static
1281     swscale_alpha
1282 "
1283
1284 HW_CODECS_LIST="
1285     cuda
1286     libmfx
1287     mmal
1288     nvenc
1289     omx
1290 "
1291
1292 HWACCEL_LIST="
1293     d3d11va
1294     dxva2
1295     vaapi
1296     vda
1297     vdpau
1298 "
1299
1300 LIBRARY_LIST="
1301     avcodec
1302     avdevice
1303     avfilter
1304     avformat
1305     avresample
1306     avutil
1307     swscale
1308 "
1309
1310 LICENSE_LIST="
1311     gpl
1312     nonfree
1313     version3
1314 "
1315
1316 PROGRAM_LIST="
1317     avconv
1318     avplay
1319     avprobe
1320 "
1321
1322 SUBSYSTEM_LIST="
1323     dct
1324     doc
1325     error_resilience
1326     faan
1327     fft
1328     lsp
1329     lzo
1330     mdct
1331     network
1332     rdft
1333 "
1334
1335 CONFIG_LIST="
1336     $COMPONENT_LIST
1337     $EXAMPLE_LIST
1338     $EXTERNAL_LIBRARY_LIST
1339     $FEATURE_LIST
1340     $HW_CODECS_LIST
1341     $HWACCEL_LIST
1342     $LICENSE_LIST
1343     $LIBRARY_LIST
1344     $PROGRAM_LIST
1345     $SUBSYSTEM_LIST
1346     memalign_hack
1347     neon_clobber_test
1348     pic
1349     pod2man
1350     texi2html
1351     thumb
1352     valgrind_backtrace
1353     xmm_clobber_test
1354 "
1355
1356 THREADS_LIST="
1357     pthreads
1358     w32threads
1359 "
1360
1361 ATOMICS_LIST="
1362     atomics_gcc
1363     atomics_suncc
1364     atomics_win32
1365 "
1366
1367 ARCH_LIST="
1368     aarch64
1369     alpha
1370     arm
1371     avr32
1372     avr32_ap
1373     avr32_uc
1374     bfin
1375     ia64
1376     m68k
1377     mips
1378     mips64
1379     parisc
1380     ppc
1381     ppc64
1382     s390
1383     sh4
1384     sparc
1385     sparc64
1386     tilegx
1387     tilepro
1388     tomi
1389     x86
1390     x86_32
1391     x86_64
1392 "
1393
1394 ARCH_EXT_LIST_ARM="
1395     armv5te
1396     armv6
1397     armv6t2
1398     armv8
1399     neon
1400     vfp
1401     vfpv3
1402 "
1403
1404 ARCH_EXT_LIST_X86_SIMD="
1405     amd3dnow
1406     amd3dnowext
1407     avx
1408     avx2
1409     fma3
1410     fma4
1411     mmx
1412     mmxext
1413     sse
1414     sse2
1415     sse3
1416     sse4
1417     sse42
1418     ssse3
1419     xop
1420 "
1421
1422 ARCH_EXT_LIST_PPC="
1423     altivec
1424     dcbzl
1425     ldbrx
1426     power8
1427     ppc4xx
1428     vsx
1429 "
1430
1431 ARCH_EXT_LIST_X86="
1432     $ARCH_EXT_LIST_X86_SIMD
1433     cpunop
1434     i686
1435 "
1436
1437 ARCH_EXT_LIST_MIPS="
1438     loongson
1439     mips32r1
1440     mips64r1
1441     mips32r2
1442     mips64r2
1443     mips32r6
1444     mips64r6
1445 "
1446
1447 ARCH_EXT_LIST="
1448     $ARCH_EXT_LIST_ARM
1449     $ARCH_EXT_LIST_MIPS
1450     $ARCH_EXT_LIST_PPC
1451     $ARCH_EXT_LIST_X86
1452     vis
1453 "
1454
1455 ARCH_FEATURES="
1456     aligned_stack
1457     fast_64bit
1458     fast_clz
1459     fast_cmov
1460     local_aligned_8
1461     local_aligned_16
1462     simd_align_16
1463 "
1464
1465 BUILTIN_LIST="
1466     atomic_cas_ptr
1467     machine_rw_barrier
1468     MemoryBarrier
1469     mm_empty
1470     rdtsc
1471     sem_timedwait
1472     sync_val_compare_and_swap
1473 "
1474 HAVE_LIST_CMDLINE="
1475     inline_asm
1476     symver
1477     yasm
1478 "
1479
1480 HAVE_LIST_PUB="
1481     bigendian
1482     fast_unaligned
1483 "
1484
1485 HEADERS_LIST="
1486     AVFoundation_AVFoundation_h
1487     alsa_asoundlib_h
1488     altivec_h
1489     arpa_inet_h
1490     cdio_paranoia_h
1491     cdio_paranoia_paranoia_h
1492     dispatch_dispatch_h
1493     dev_bktr_ioctl_bt848_h
1494     dev_bktr_ioctl_meteor_h
1495     dev_ic_bt8xx_h
1496     dev_video_bktr_ioctl_bt848_h
1497     dev_video_meteor_ioctl_meteor_h
1498     direct_h
1499     dlfcn_h
1500     d3d11_h
1501     dxva_h
1502     gsm_h
1503     io_h
1504     mach_mach_time_h
1505     machine_ioctl_bt848_h
1506     machine_ioctl_meteor_h
1507     malloc_h
1508     poll_h
1509     sndio_h
1510     soundcard_h
1511     sys_mman_h
1512     sys_param_h
1513     sys_resource_h
1514     sys_select_h
1515     sys_soundcard_h
1516     sys_time_h
1517     sys_un_h
1518     sys_videoio_h
1519     unistd_h
1520     valgrind_valgrind_h
1521     windows_h
1522     winsock2_h
1523 "
1524
1525 INTRINSICS_LIST="
1526     intrinsics_neon
1527 "
1528
1529 MATH_FUNCS="
1530     atanf
1531     atan2f
1532     cbrtf
1533     cosf
1534     exp2
1535     exp2f
1536     expf
1537     isinf
1538     isnan
1539     ldexpf
1540     llrint
1541     llrintf
1542     log2
1543     log2f
1544     log10f
1545     lrint
1546     lrintf
1547     powf
1548     rint
1549     round
1550     roundf
1551     sinf
1552     trunc
1553     truncf
1554 "
1555
1556 SYSTEM_FUNCS="
1557     aligned_malloc
1558     clock_gettime
1559     closesocket
1560     CommandLineToArgvW
1561     CoTaskMemFree
1562     CryptGenRandom
1563     dlopen
1564     fcntl
1565     flt_lim
1566     fork
1567     getaddrinfo
1568     gethrtime
1569     getopt
1570     GetProcessAffinityMask
1571     GetProcessMemoryInfo
1572     GetProcessTimes
1573     getrusage
1574     GetSystemTimeAsFileTime
1575     gettimeofday
1576     gmtime_r
1577     inet_aton
1578     isatty
1579     jack_port_get_latency_range
1580     LoadLibrary
1581     localtime_r
1582     mach_absolute_time
1583     MapViewOfFile
1584     memalign
1585     mkstemp
1586     mmap
1587     mprotect
1588     nanosleep
1589     posix_memalign
1590     sched_getaffinity
1591     SetConsoleTextAttribute
1592     setmode
1593     setrlimit
1594     Sleep
1595     strerror_r
1596     sysconf
1597     sysctl
1598     usleep
1599     VirtualAlloc
1600 "
1601
1602 TOOLCHAIN_FEATURES="
1603     as_dn_directive
1604     as_func
1605     as_object_arch
1606     asm_mod_q
1607     attribute_may_alias
1608     attribute_packed
1609     ebp_available
1610     ebx_available
1611     gnu_as
1612     ibm_asm
1613     inline_asm_labels
1614     pragma_deprecated
1615     symver_asm_label
1616     symver_gnu_asm
1617     vfp_args
1618     xform_asm
1619     xmm_clobbers
1620 "
1621
1622 TYPES_LIST="
1623     CONDITION_VARIABLE_Ptr
1624     socklen_t
1625     struct_addrinfo
1626     struct_group_source_req
1627     struct_ip_mreq_source
1628     struct_ipv6_mreq
1629     struct_pollfd
1630     struct_rusage_ru_maxrss
1631     struct_sockaddr_in6
1632     struct_sockaddr_sa_len
1633     struct_sockaddr_storage
1634     struct_v4l2_frmivalenum_discrete
1635 "
1636
1637 HAVE_LIST="
1638     $ARCH_EXT_LIST
1639     $(add_suffix _external $ARCH_EXT_LIST)
1640     $(add_suffix _inline   $ARCH_EXT_LIST)
1641     $ARCH_FEATURES
1642     $ATOMICS_LIST
1643     $BUILTIN_LIST
1644     $HAVE_LIST_CMDLINE
1645     $HAVE_LIST_PUB
1646     $HEADERS_LIST
1647     $INTRINSICS_LIST
1648     $MATH_FUNCS
1649     $SYSTEM_FUNCS
1650     $THREADS_LIST
1651     $TOOLCHAIN_FEATURES
1652     $TYPES_LIST
1653     atomics_native
1654     dos_paths
1655     dxva2_lib
1656     libc_msvcrt
1657     libdc1394_1
1658     libdc1394_2
1659     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1660     sdl
1661     section_data_rel_ro
1662     threads
1663     vaapi_drm
1664     vaapi_x11
1665     vdpau_x11
1666     xlib
1667 "
1668
1669 # options emitted with CONFIG_ prefix but not available on the command line
1670 CONFIG_EXTRA="
1671     aandcttables
1672     ac3dsp
1673     audio_frame_queue
1674     audiodsp
1675     blockdsp
1676     bswapdsp
1677     cabac
1678     dirac_parse
1679     dvprofile
1680     faandct
1681     faanidct
1682     fdctdsp
1683     flacdsp
1684     fmtconvert
1685     g722dsp
1686     gcrypt
1687     gmp
1688     golomb
1689     gplv3
1690     h263dsp
1691     h264chroma
1692     h264dsp
1693     h264pred
1694     h264qpel
1695     hpeldsp
1696     huffman
1697     huffyuvdsp
1698     huffyuvencdsp
1699     idctdsp
1700     iirfilter
1701     imdct15
1702     intrax8
1703     iso_media
1704     ividsp
1705     jpegtables
1706     libx262
1707     lgplv3
1708     lpc
1709     lzf
1710     me_cmp
1711     mpeg_er
1712     mpegaudio
1713     mpegaudiodsp
1714     mpegvideo
1715     mpegvideoenc
1716     mss34dsp
1717     pixblockdsp
1718     qpeldsp
1719     qsv
1720     qsvdec
1721     qsvenc
1722     rangecoder
1723     riffdec
1724     riffenc
1725     rtpdec
1726     rtpenc_chain
1727     rv34dsp
1728     sinewin
1729     snappy
1730     srtp
1731     startcode
1732     texturedsp
1733     texturedspenc
1734     tpeldsp
1735     vaapi_encode
1736     vc1dsp
1737     videodsp
1738     vp3dsp
1739     vp56dsp
1740     vp8dsp
1741     wma_freqs
1742     wmv2dsp
1743 "
1744
1745 CMDLINE_SELECT="
1746     $ARCH_EXT_LIST
1747     $CONFIG_LIST
1748     $HAVE_LIST_CMDLINE
1749     $THREADS_LIST
1750     asm
1751     cross_compile
1752     debug
1753     extra_warnings
1754     logging
1755     lto
1756     optimizations
1757     rpath
1758 "
1759
1760 PATHS_LIST="
1761     bindir
1762     datadir
1763     docdir
1764     incdir
1765     libdir
1766     mandir
1767     prefix
1768     shlibdir
1769 "
1770
1771 CMDLINE_SET="
1772     $PATHS_LIST
1773     ar
1774     arch
1775     as
1776     build_suffix
1777     cc
1778     objcc
1779     cpu
1780     cross_prefix
1781     custom_allocator
1782     dep_cc
1783     env
1784     extra_version
1785     host_cc
1786     host_cflags
1787     host_ld
1788     host_ldflags
1789     host_libs
1790     host_os
1791     ld
1792     logfile
1793     malloc_prefix
1794     nm
1795     optflags
1796     pkg_config
1797     pkg_config_flags
1798     random_seed
1799     samples
1800     sysinclude
1801     sysroot
1802     target_exec
1803     target_os
1804     target_path
1805     target_samples
1806     toolchain
1807 "
1808
1809 CMDLINE_APPEND="
1810     extra_cflags
1811     extra_objcflags
1812     host_cppflags
1813 "
1814
1815 # code dependency declarations
1816
1817 # architecture extensions
1818
1819 armv5te_deps="arm"
1820 armv6_deps="arm"
1821 armv6t2_deps="arm"
1822 armv8_deps="aarch64"
1823 neon_deps_any="aarch64 arm"
1824 intrinsics_neon_deps="neon"
1825 vfp_deps_any="aarch64 arm"
1826 vfpv3_deps="vfp"
1827
1828 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1829
1830 altivec_deps="ppc"
1831 ppc4xx_deps="ppc"
1832 vsx_deps="altivec"
1833 power8_deps="vsx"
1834
1835 cpunop_deps="i686"
1836 x86_64_select="i686"
1837 x86_64_suggest="fast_cmov"
1838
1839 amd3dnow_deps="mmx"
1840 amd3dnowext_deps="amd3dnow"
1841 i686_deps="x86"
1842 mmx_deps="x86"
1843 mmxext_deps="mmx"
1844 sse_deps="mmxext"
1845 sse2_deps="sse"
1846 sse3_deps="sse2"
1847 ssse3_deps="sse3"
1848 sse4_deps="ssse3"
1849 sse42_deps="sse4"
1850 avx_deps="sse42"
1851 xop_deps="avx"
1852 fma3_deps="avx"
1853 fma4_deps="avx"
1854 avx2_deps="avx"
1855
1856 mmx_external_deps="yasm"
1857 mmx_inline_deps="inline_asm"
1858 mmx_suggest="mmx_external mmx_inline"
1859
1860 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1861     eval dep=\$${ext}_deps
1862     eval ${ext}_external_deps='"${dep}_external"'
1863     eval ${ext}_inline_deps='"${dep}_inline"'
1864     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1865 done
1866
1867 aligned_stack_if_any="aarch64 ppc x86"
1868 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1869 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1870 fast_unaligned_if_any="aarch64 ppc x86"
1871 simd_align_16_if_any="altivec neon sse"
1872
1873 # system capabilities
1874 symver_if_any="symver_asm_label symver_gnu_asm"
1875 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1876
1877 # threading support
1878 atomics_gcc_if="sync_val_compare_and_swap"
1879 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1880 atomics_win32_if="MemoryBarrier"
1881 atomics_native_if_any="$ATOMICS_LIST"
1882 w32threads_deps="atomics_native"
1883 threads_if_any="$THREADS_LIST"
1884
1885 # subsystems
1886 dct_select="rdft"
1887 dirac_parse_select="golomb"
1888 error_resilience_select="me_cmp"
1889 faandct_deps="faan fdctdsp"
1890 faanidct_deps="faan idctdsp"
1891 h264dsp_select="startcode"
1892 intrax8_select="blockdsp idctdsp"
1893 mdct_select="fft"
1894 rdft_select="fft"
1895 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1896 mpeg_er_select="error_resilience"
1897 mpegaudio_select="mpegaudiodsp"
1898 mpegaudiodsp_select="dct"
1899 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1900 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1901 vc1dsp_select="h264chroma qpeldsp startcode"
1902
1903 # decoders / encoders
1904 aac_decoder_select="imdct15 mdct sinewin"
1905 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1906 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1907 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1908 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1909 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1910 adpcm_g722_decoder_select="g722dsp"
1911 adpcm_g722_encoder_select="g722dsp"
1912 aic_decoder_select="golomb idctdsp"
1913 alac_encoder_select="lpc"
1914 als_decoder_select="bswapdsp"
1915 amrnb_decoder_select="lsp"
1916 amrwb_decoder_select="lsp"
1917 amv_decoder_select="sp5x_decoder"
1918 ape_decoder_select="bswapdsp"
1919 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1920 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1921 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1922 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1923 atrac1_decoder_select="mdct sinewin"
1924 atrac3_decoder_select="mdct"
1925 atrac3p_decoder_select="mdct sinewin"
1926 bink_decoder_select="blockdsp hpeldsp"
1927 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1928 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1929 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1930 cllc_decoder_select="bswapdsp"
1931 comfortnoise_encoder_select="lpc"
1932 cook_decoder_select="audiodsp mdct sinewin"
1933 cscd_decoder_select="lzo"
1934 cscd_decoder_suggest="zlib"
1935 dca_decoder_select="fmtconvert mdct"
1936 dds_decoder_select="texturedsp"
1937 dnxhd_decoder_select="blockdsp idctdsp"
1938 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1939 dvvideo_decoder_select="dvprofile idctdsp"
1940 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1941 dxa_decoder_deps="zlib"
1942 dxv_decoder_select="lzf texturedsp"
1943 eac3_decoder_select="ac3_decoder"
1944 eac3_encoder_select="ac3_encoder"
1945 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1946 eatgq_decoder_select="aandcttables idctdsp"
1947 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1948 exr_decoder_deps="zlib"
1949 ffv1_decoder_select="golomb rangecoder"
1950 ffv1_encoder_select="rangecoder"
1951 ffvhuff_decoder_select="huffyuv_decoder"
1952 ffvhuff_encoder_select="huffyuv_encoder"
1953 fic_decoder_select="golomb"
1954 flac_decoder_select="flacdsp golomb"
1955 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1956 flashsv_decoder_deps="zlib"
1957 flashsv_encoder_deps="zlib"
1958 flashsv2_decoder_deps="zlib"
1959 flv_decoder_select="h263_decoder"
1960 flv_encoder_select="h263_encoder"
1961 fourxm_decoder_select="blockdsp bswapdsp"
1962 fraps_decoder_select="bswapdsp huffman"
1963 g2m_decoder_deps="zlib"
1964 g2m_decoder_select="blockdsp idctdsp jpegtables"
1965 h261_decoder_select="mpeg_er mpegvideo"
1966 h261_encoder_select="aandcttables mpegvideoenc"
1967 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1968 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1969 h263i_decoder_select="h263_decoder"
1970 h263p_encoder_select="h263_encoder"
1971 h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel videodsp"
1972 h264_decoder_suggest="error_resilience"
1973 hap_decoder_select="snappy texturedsp"
1974 hap_encoder_deps="libsnappy"
1975 hap_encoder_select="texturedspenc"
1976 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1977 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1978 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1979 iac_decoder_select="imc_decoder"
1980 imc_decoder_select="bswapdsp fft mdct sinewin"
1981 indeo3_decoder_select="hpeldsp"
1982 indeo4_decoder_select="ividsp"
1983 indeo5_decoder_select="ividsp"
1984 interplay_video_decoder_select="hpeldsp"
1985 jpegls_decoder_select="golomb mjpeg_decoder"
1986 jpegls_encoder_select="golomb"
1987 jv_decoder_select="blockdsp"
1988 lagarith_decoder_select="huffyuvdsp"
1989 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
1990 loco_decoder_select="golomb"
1991 mdec_decoder_select="blockdsp idctdsp mpegvideo"
1992 metasound_decoder_select="lsp mdct sinewin"
1993 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
1994 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
1995 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
1996 mjpegb_decoder_select="mjpeg_decoder"
1997 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
1998 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
1999 mlp_decoder_select="mlp_parser"
2000 motionpixels_decoder_select="bswapdsp"
2001 mp1_decoder_select="mpegaudio"
2002 mp1float_decoder_select="mpegaudio"
2003 mp2_decoder_select="mpegaudio"
2004 mp2float_decoder_select="mpegaudio"
2005 mp3_decoder_select="mpegaudio"
2006 mp3adu_decoder_select="mpegaudio"
2007 mp3adufloat_decoder_select="mpegaudio"
2008 mp3float_decoder_select="mpegaudio"
2009 mp3on4_decoder_select="mpegaudio"
2010 mp3on4float_decoder_select="mpegaudio"
2011 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2012 mpc8_decoder_select="mpegaudiodsp"
2013 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2014 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2015 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2016 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2017 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2018 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2019 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2020 mpeg4_encoder_select="h263_encoder"
2021 msa1_decoder_select="mss34dsp"
2022 msmpeg4v1_decoder_select="h263_decoder"
2023 msmpeg4v2_decoder_select="h263_decoder"
2024 msmpeg4v2_encoder_select="h263_encoder"
2025 msmpeg4v3_decoder_select="h263_decoder"
2026 msmpeg4v3_encoder_select="h263_encoder"
2027 mss2_decoder_select="error_resilience mpeg_er mpegvideo vc1_decoder"
2028 mts2_decoder_select="mss34dsp"
2029 mxpeg_decoder_select="mjpeg_decoder"
2030 nellymoser_decoder_select="mdct sinewin"
2031 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2032 nuv_decoder_select="idctdsp lzo"
2033 on2avc_decoder_select="mdct"
2034 opus_decoder_deps="avresample"
2035 opus_decoder_select="imdct15"
2036 png_decoder_deps="zlib"
2037 png_encoder_deps="zlib"
2038 png_encoder_select="huffyuvencdsp"
2039 prores_decoder_select="idctdsp"
2040 prores_encoder_select="fdctdsp"
2041 qcelp_decoder_select="lsp"
2042 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2043 ra_144_encoder_select="audio_frame_queue lpc"
2044 ralf_decoder_select="golomb"
2045 rscc_decoder_deps="zlib"
2046 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2047 rv10_encoder_select="h263_encoder"
2048 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2049 rv20_encoder_select="h263_encoder"
2050 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2051 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2052 screenpresso_decoder_deps="zlib"
2053 shorten_decoder_select="golomb"
2054 sipr_decoder_select="lsp"
2055 sp5x_decoder_select="mjpeg_decoder"
2056 svq1_decoder_select="hpeldsp"
2057 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2058 svq3_decoder_select="golomb h264dsp h264pred hpeldsp tpeldsp videodsp"
2059 svq3_decoder_suggest="zlib"
2060 tak_decoder_select="audiodsp"
2061 tdsc_decoder_deps="zlib"
2062 tdsc_decoder_select="mjpeg_decoder"
2063 theora_decoder_select="vp3_decoder"
2064 thp_decoder_select="mjpeg_decoder"
2065 tiff_decoder_suggest="zlib"
2066 tiff_encoder_suggest="zlib"
2067 truehd_decoder_select="mlp_decoder"
2068 truemotion2_decoder_select="bswapdsp"
2069 truespeech_decoder_select="bswapdsp"
2070 tscc_decoder_deps="zlib"
2071 txd_decoder_select="texturedsp"
2072 twinvq_decoder_select="mdct lsp sinewin"
2073 utvideo_decoder_select="bswapdsp"
2074 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2075 vble_decoder_select="huffyuvdsp"
2076 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2077 vc1image_decoder_select="vc1_decoder"
2078 vorbis_decoder_select="mdct"
2079 vorbis_encoder_select="mdct"
2080 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2081 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2082 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2083 vp6a_decoder_select="vp6_decoder"
2084 vp6f_decoder_select="vp6_decoder"
2085 vp7_decoder_select="h264pred videodsp vp8dsp"
2086 vp8_decoder_select="h264pred videodsp vp8dsp"
2087 vp9_decoder_select="videodsp"
2088 webp_decoder_select="vp8_decoder"
2089 wmapro_decoder_select="mdct sinewin wma_freqs"
2090 wmav1_decoder_select="mdct sinewin wma_freqs"
2091 wmav1_encoder_select="mdct sinewin wma_freqs"
2092 wmav2_decoder_select="mdct sinewin wma_freqs"
2093 wmav2_encoder_select="mdct sinewin wma_freqs"
2094 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2095 wmv1_decoder_select="h263_decoder"
2096 wmv1_encoder_select="h263_encoder"
2097 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2098 wmv2_encoder_select="h263_encoder wmv2dsp"
2099 wmv3_decoder_select="vc1_decoder"
2100 wmv3image_decoder_select="wmv3_decoder"
2101 zerocodec_decoder_deps="zlib"
2102 zlib_decoder_deps="zlib"
2103 zlib_encoder_deps="zlib"
2104 zmbv_decoder_deps="zlib"
2105 zmbv_encoder_deps="zlib"
2106
2107 # hardware accelerators
2108 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2109 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2110 vaapi_deps="va_va_h"
2111 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2112 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2113 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2114
2115 h263_vaapi_hwaccel_deps="vaapi"
2116 h263_vaapi_hwaccel_select="h263_decoder"
2117 h264_d3d11va_hwaccel_deps="d3d11va"
2118 h264_d3d11va_hwaccel_select="h264_decoder"
2119 h264_dxva2_hwaccel_deps="dxva2"
2120 h264_dxva2_hwaccel_select="h264_decoder"
2121 h264_mmal_decoder_deps="mmal"
2122 h264_mmal_decoder_select="mmal"
2123 h264_mmal_hwaccel_deps="mmal"
2124 h264_omx_encoder_deps="omx"
2125 h264_qsv_hwaccel_deps="libmfx"
2126 h264_vaapi_hwaccel_deps="vaapi"
2127 h264_vaapi_hwaccel_select="h264_decoder"
2128 h264_vda_hwaccel_deps="vda"
2129 h264_vda_hwaccel_select="h264_decoder"
2130 h264_vda_old_hwaccel_deps="vda"
2131 h264_vda_old_hwaccel_select="h264_decoder"
2132 h264_vdpau_hwaccel_deps="vdpau"
2133 h264_vdpau_hwaccel_select="h264_decoder"
2134 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2135 hevc_d3d11va_hwaccel_select="hevc_decoder"
2136 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2137 hevc_dxva2_hwaccel_select="hevc_decoder"
2138 hevc_qsv_hwaccel_deps="libmfx"
2139 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2140 hevc_vdpau_hwaccel_select="hevc_decoder"
2141 mpeg1_vdpau_hwaccel_deps="vdpau"
2142 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2143 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2144 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2145 mpeg2_dxva2_hwaccel_deps="dxva2"
2146 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2147 mpeg2_mmal_decoder_deps="mmal"
2148 mpeg2_mmal_decoder_select="mmal"
2149 mpeg2_mmal_hwaccel_deps="mmal"
2150 mpeg2_qsv_hwaccel_deps="libmfx"
2151 mpeg2_vaapi_hwaccel_deps="vaapi"
2152 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2153 mpeg2_vdpau_hwaccel_deps="vdpau"
2154 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2155 mpeg4_omx_encoder_deps="omx"
2156 mpeg4_vaapi_hwaccel_deps="vaapi"
2157 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2158 mpeg4_vdpau_hwaccel_deps="vdpau"
2159 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2160 vc1_d3d11va_hwaccel_deps="d3d11va"
2161 vc1_d3d11va_hwaccel_select="vc1_decoder"
2162 vc1_dxva2_hwaccel_deps="dxva2"
2163 vc1_dxva2_hwaccel_select="vc1_decoder"
2164 vc1_mmal_decoder_deps="mmal"
2165 vc1_mmal_decoder_select="mmal"
2166 vc1_mmal_hwaccel_deps="mmal"
2167 vc1_vaapi_hwaccel_deps="vaapi"
2168 vc1_vaapi_hwaccel_select="vc1_decoder"
2169 vc1_vdpau_hwaccel_deps="vdpau"
2170 vc1_vdpau_hwaccel_select="vc1_decoder"
2171 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2172 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2173 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2174 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2175
2176 # hardware-accelerated codecs
2177 nvenc_deps_any="dlopen LoadLibrary"
2178 nvenc_extralibs='$ldl'
2179 omx_deps="dlopen pthreads"
2180 omx_extralibs='$ldl'
2181 qsvdec_select="qsv"
2182 qsvenc_select="qsv"
2183 vaapi_encode_deps="vaapi"
2184
2185 hwupload_cuda_filter_deps="cuda"
2186 scale_npp_filter_deps="cuda libnpp"
2187
2188 h264_nvenc_encoder_deps="nvenc"
2189 h264_qsv_decoder_deps="libmfx"
2190 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2191 h264_qsv_encoder_deps="libmfx"
2192 h264_qsv_encoder_select="qsvenc"
2193 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2194 h264_vaapi_encoder_select="vaapi_encode golomb"
2195
2196 hevc_nvenc_encoder_deps="nvenc"
2197 hevc_qsv_decoder_deps="libmfx"
2198 hevc_qsv_encoder_deps="libmfx"
2199 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2200 hevc_qsv_encoder_select="qsvenc"
2201 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2202 hevc_vaapi_encoder_select="vaapi_encode golomb"
2203 mpeg2_qsv_decoder_deps="libmfx"
2204 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2205 mpeg2_qsv_encoder_deps="libmfx"
2206 mpeg2_qsv_encoder_select="qsvenc"
2207
2208 nvenc_h264_encoder_deps="nvenc"
2209 nvenc_hevc_encoder_deps="nvenc"
2210
2211 # parsers
2212 h264_parser_select="golomb h264dsp"
2213 hevc_parser_select="golomb"
2214 mpegvideo_parser_select="mpegvideo"
2215 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2216 vc1_parser_select="vc1dsp"
2217
2218 # bitstream_filters
2219 mjpeg2jpeg_bsf_select="jpegtables"
2220
2221 # external libraries
2222 libdcadec_decoder_deps="libdcadec"
2223 libfaac_encoder_deps="libfaac"
2224 libfaac_encoder_select="audio_frame_queue"
2225 libfdk_aac_decoder_deps="libfdk_aac"
2226 libfdk_aac_encoder_deps="libfdk_aac"
2227 libfdk_aac_encoder_select="audio_frame_queue"
2228 libgsm_decoder_deps="libgsm"
2229 libgsm_encoder_deps="libgsm"
2230 libgsm_ms_decoder_deps="libgsm"
2231 libgsm_ms_encoder_deps="libgsm"
2232 libilbc_decoder_deps="libilbc"
2233 libilbc_encoder_deps="libilbc"
2234 libkvazaar_encoder_deps="libkvazaar"
2235 libmp3lame_encoder_deps="libmp3lame"
2236 libmp3lame_encoder_select="audio_frame_queue"
2237 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2238 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2239 libopencore_amrnb_encoder_select="audio_frame_queue"
2240 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2241 libopenh264_encoder_deps="libopenh264"
2242 libopenjpeg_decoder_deps="libopenjpeg"
2243 libopenjpeg_encoder_deps="libopenjpeg"
2244 libopus_decoder_deps="libopus"
2245 libopus_encoder_deps="libopus"
2246 libopus_encoder_select="audio_frame_queue"
2247 libschroedinger_decoder_deps="libschroedinger"
2248 libschroedinger_encoder_deps="libschroedinger"
2249 libspeex_decoder_deps="libspeex"
2250 libspeex_encoder_deps="libspeex"
2251 libspeex_encoder_select="audio_frame_queue"
2252 libtheora_encoder_deps="libtheora"
2253 libtwolame_encoder_deps="libtwolame"
2254 libvo_aacenc_encoder_deps="libvo_aacenc"
2255 libvo_aacenc_encoder_select="audio_frame_queue"
2256 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2257 libvorbis_encoder_deps="libvorbis"
2258 libvorbis_encoder_select="audio_frame_queue"
2259 libvpx_vp8_decoder_deps="libvpx"
2260 libvpx_vp8_encoder_deps="libvpx"
2261 libvpx_vp9_decoder_deps="libvpx"
2262 libvpx_vp9_encoder_deps="libvpx"
2263 libwavpack_encoder_deps="libwavpack"
2264 libwebp_encoder_deps="libwebp"
2265 libx262_encoder_deps="libx262"
2266 libx264_encoder_deps="libx264"
2267 libx265_encoder_deps="libx265"
2268 libxavs_encoder_deps="libxavs"
2269 libxvid_encoder_deps="libxvid"
2270
2271 # demuxers / muxers
2272 ac3_demuxer_select="ac3_parser"
2273 asf_demuxer_select="riffdec"
2274 asf_muxer_select="riffenc"
2275 asf_stream_muxer_select="asf_muxer"
2276 avi_demuxer_select="iso_media riffdec"
2277 avi_muxer_select="riffenc"
2278 avisynth_demuxer_deps="avisynth"
2279 avisynth_demuxer_select="riffdec"
2280 caf_demuxer_select="iso_media riffdec"
2281 dash_muxer_select="mp4_muxer"
2282 dirac_demuxer_select="dirac_parser"
2283 dv_demuxer_select="dvprofile"
2284 dv_muxer_select="dvprofile"
2285 dxa_demuxer_select="riffdec"
2286 eac3_demuxer_select="ac3_parser"
2287 f4v_muxer_select="mov_muxer"
2288 flac_demuxer_select="flac_parser"
2289 hds_muxer_select="flv_muxer"
2290 hls_muxer_select="mpegts_muxer"
2291 ipod_muxer_select="mov_muxer"
2292 ismv_muxer_select="mov_muxer"
2293 matroska_audio_muxer_select="matroska_muxer"
2294 matroska_demuxer_select="iso_media riffdec"
2295 matroska_demuxer_suggest="bzlib lzo zlib"
2296 matroska_muxer_select="iso_media riffenc"
2297 mmf_muxer_select="riffenc"
2298 mov_demuxer_select="iso_media riffdec"
2299 mov_demuxer_suggest="zlib"
2300 mov_muxer_select="iso_media riffenc rtpenc_chain"
2301 mp3_demuxer_select="mpegaudio_parser"
2302 mp4_muxer_select="mov_muxer"
2303 mpegts_demuxer_select="iso_media"
2304 mpegts_muxer_select="adts_muxer latm_muxer"
2305 mpegtsraw_demuxer_select="mpegts_demuxer"
2306 mxf_d10_muxer_select="mxf_muxer"
2307 nut_muxer_select="riffenc"
2308 nuv_demuxer_select="riffdec"
2309 oga_muxer_select="ogg_muxer"
2310 ogg_demuxer_select="dirac_parse"
2311 opus_muxer_select="ogg_muxer"
2312 psp_muxer_select="mov_muxer"
2313 rtp_demuxer_select="sdp_demuxer"
2314 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2315 rtsp_demuxer_select="http_protocol rtpdec"
2316 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2317 sap_demuxer_select="sdp_demuxer"
2318 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2319 sdp_demuxer_select="rtpdec"
2320 smoothstreaming_muxer_select="ismv_muxer"
2321 spdif_muxer_select="aac_parser"
2322 spx_muxer_select="ogg_muxer"
2323 swf_demuxer_suggest="zlib"
2324 tak_demuxer_select="tak_parser"
2325 tg2_muxer_select="mov_muxer"
2326 tgp_muxer_select="mov_muxer"
2327 w64_demuxer_select="wav_demuxer"
2328 wav_demuxer_select="riffdec"
2329 wav_muxer_select="riffenc"
2330 webm_muxer_select="iso_media riffenc"
2331 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2332 wtv_demuxer_select="mpegts_demuxer riffdec"
2333 xmv_demuxer_select="riffdec"
2334 xwma_demuxer_select="riffdec"
2335
2336 # indevs / outdevs
2337 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2338 alsa_outdev_deps="alsa_asoundlib_h"
2339 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2340 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2341 dv1394_indev_deps="dv1394"
2342 dv1394_indev_select="dv_demuxer"
2343 fbdev_indev_deps="linux_fb_h"
2344 jack_indev_deps="jack_jack_h"
2345 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2346 libcdio_indev_deps="libcdio"
2347 libdc1394_indev_deps="libdc1394"
2348 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2349 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2350 pulse_indev_deps="libpulse"
2351 sndio_indev_deps="sndio_h"
2352 sndio_outdev_deps="sndio_h"
2353 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2354 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2355 vfwcap_indev_extralibs="-lavicap32"
2356 x11grab_indev_deps="x11grab"
2357 x11grab_xcb_indev_deps="libxcb"
2358
2359 # protocols
2360 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2361 ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
2362 ffrtmpcrypt_protocol_select="tcp_protocol"
2363 ffrtmphttp_protocol_deps="!librtmp_protocol"
2364 ffrtmphttp_protocol_select="http_protocol"
2365 gopher_protocol_select="network"
2366 http_protocol_select="tcp_protocol"
2367 httpproxy_protocol_select="tcp_protocol"
2368 https_protocol_select="tls_protocol"
2369 icecast_protocol_select="http_protocol"
2370 librtmp_protocol_deps="librtmp"
2371 librtmpe_protocol_deps="librtmp"
2372 librtmps_protocol_deps="librtmp"
2373 librtmpt_protocol_deps="librtmp"
2374 librtmpte_protocol_deps="librtmp"
2375 mmsh_protocol_select="http_protocol"
2376 mmst_protocol_select="network"
2377 rtmp_protocol_deps="!librtmp_protocol"
2378 rtmp_protocol_select="tcp_protocol"
2379 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2380 rtmps_protocol_deps="!librtmp_protocol"
2381 rtmps_protocol_select="tls_protocol"
2382 rtmpt_protocol_select="ffrtmphttp_protocol"
2383 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2384 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2385 rtp_protocol_select="udp_protocol"
2386 sctp_protocol_deps="struct_sctp_event_subscribe"
2387 sctp_protocol_select="network"
2388 srtp_protocol_select="rtp_protocol srtp"
2389 tcp_protocol_select="network"
2390 tls_gnutls_protocol_deps="gnutls"
2391 tls_gnutls_protocol_select="tcp_protocol"
2392 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2393 tls_openssl_protocol_select="tcp_protocol"
2394 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2395 udp_protocol_select="network"
2396 unix_protocol_deps="sys_un_h"
2397 unix_protocol_select="network"
2398
2399 # filters
2400 blackframe_filter_deps="gpl"
2401 boxblur_filter_deps="gpl"
2402 bs2b_filter_deps="libbs2b"
2403 cropdetect_filter_deps="gpl"
2404 delogo_filter_deps="gpl"
2405 drawtext_filter_deps="libfreetype"
2406 frei0r_filter_deps="frei0r dlopen"
2407 frei0r_filter_extralibs='$ldl'
2408 frei0r_src_filter_deps="frei0r dlopen"
2409 frei0r_src_filter_extralibs='$ldl'
2410 hqdn3d_filter_deps="gpl"
2411 interlace_filter_deps="gpl"
2412 ocv_filter_deps="libopencv"
2413 resample_filter_deps="avresample"
2414 scale_filter_deps="swscale"
2415 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2416
2417 # examples
2418 avcodec_example_deps="avcodec avutil"
2419 filter_audio_example_deps="avfilter avutil"
2420 metadata_example_deps="avformat avutil"
2421 output_example_deps="avcodec avformat avutil swscale"
2422 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder vaapi_x11"
2423 transcode_aac_example_deps="avcodec avformat avresample"
2424
2425 # libraries, in linking order
2426 avcodec_deps="avutil"
2427 avdevice_deps="avformat avcodec avutil"
2428 avfilter_deps="avutil"
2429 avformat_deps="avcodec avutil"
2430 avresample_deps="avutil"
2431 swscale_deps="avutil"
2432
2433 # programs
2434 avconv_deps="avcodec avfilter avformat avresample swscale"
2435 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2436                fps_filter null_filter resample_filter scale_filter
2437                setpts_filter trim_filter"
2438 avplay_deps="avcodec avfilter avformat avresample sdl"
2439 avplay_libs='$sdl_libs'
2440 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2441 avprobe_deps="avcodec avformat"
2442
2443 # documentation
2444 pod2man_deps="doc"
2445 texi2html_deps="doc"
2446
2447 # default parameters
2448
2449 logfile="config.log"
2450
2451 # installation paths
2452 prefix_default="/usr/local"
2453 bindir_default='${prefix}/bin'
2454 datadir_default='${prefix}/share/avconv'
2455 docdir_default='${prefix}/share/doc/libav'
2456 incdir_default='${prefix}/include'
2457 libdir_default='${prefix}/lib'
2458 mandir_default='${prefix}/share/man'
2459 shlibdir_default="$libdir_default"
2460
2461 # toolchain
2462 ar_default="ar"
2463 cc_default="gcc"
2464 host_cc_default="gcc"
2465 cp_f="cp -f"
2466 ln_s="ln -s -f"
2467 nm_default="nm -g"
2468 objformat="elf"
2469 pkg_config_default=pkg-config
2470 ranlib="ranlib"
2471 strip="strip"
2472 yasmexe="yasm"
2473
2474 # machine
2475 arch_default=$(uname -m)
2476 cpu="generic"
2477 intrinsics="none"
2478
2479 # OS
2480 target_os_default=$(tolower $(uname -s))
2481 host_os=$target_os_default
2482
2483 # configurable options
2484 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2485
2486 enable asm
2487 enable debug
2488 enable doc
2489 enable faan faandct faanidct
2490 enable optimizations
2491 enable safe_bitstream_reader
2492 enable static
2493 enable swscale_alpha
2494 enable valgrind_backtrace
2495
2496 # By default, enable only those hwaccels that have no external dependencies.
2497 enable d3d11va dxva2 vda vdpau
2498
2499 # build settings
2500 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2501 LIBPREF="lib"
2502 LIBSUF=".a"
2503 FULLNAME='$(NAME)$(BUILDSUF)'
2504 LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
2505 SLIBPREF="lib"
2506 SLIBSUF=".so"
2507 SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
2508 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2509 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2510 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2511 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2512 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2513
2514 asflags_filter=echo
2515 cflags_filter=echo
2516 ldflags_filter=echo
2517
2518 AS_C='-c'
2519 AS_O='-o $@'
2520 CC_C='-c'
2521 CC_E='-E -o $@'
2522 CC_O='-o $@'
2523 OBJCC_C='-c'
2524 OBJCC_E='-E -o $@'
2525 OBJCC_O='-o $@'
2526 LD_O='-o $@'
2527 LD_LIB='-l%'
2528 LD_PATH='-L'
2529 HOSTCC_C='-c'
2530 HOSTCC_E='-E -o $@'
2531 HOSTCC_O='-o $@'
2532 HOSTLD_O='-o $@'
2533
2534 host_libs='-lm'
2535 host_cflags_filter=echo
2536 host_ldflags_filter=echo
2537
2538 target_path='$(CURDIR)'
2539
2540 # since the object filename is not given with the -MM flag, the compiler
2541 # is only able to print the basename, and we must add the path ourselves
2542 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2543 DEPFLAGS='-MM'
2544
2545 # find source path
2546 if test -f configure; then
2547     source_path=.
2548 else
2549     source_path=$(cd $(dirname "$0"); pwd)
2550     echo "$source_path" | grep -q '[[:blank:]]' &&
2551         die "Out of tree builds are impossible with whitespace in source path."
2552     test -e "$source_path/config.h" &&
2553         die "Out of tree builds are impossible with config.h in source dir."
2554 fi
2555
2556 for v in "$@"; do
2557     r=${v#*=}
2558     l=${v%"$r"}
2559     r=$(sh_quote "$r")
2560     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2561 done
2562
2563 find_things(){
2564     thing=$1
2565     pattern=$2
2566     file=$source_path/$3
2567     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2568 }
2569
2570 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2571 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2572 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2573 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2574 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2575 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2576 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2577 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2578 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2579
2580 find_things_extern(){
2581     thing=$1
2582     pattern=$2
2583     file=$source_path/$3
2584     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2585 }
2586
2587 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2588 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2589
2590 ALL_COMPONENTS="
2591     $BSF_LIST
2592     $DECODER_LIST
2593     $DEMUXER_LIST
2594     $ENCODER_LIST
2595     $FILTER_LIST
2596     $HWACCEL_LIST
2597     $INDEV_LIST
2598     $MUXER_LIST
2599     $OUTDEV_LIST
2600     $PARSER_LIST
2601     $PROTOCOL_LIST
2602 "
2603
2604 for n in $COMPONENT_LIST; do
2605     v=$(toupper ${n%s})_LIST
2606     eval enable \$$v
2607     eval ${n}_if_any="\$$v"
2608 done
2609
2610 enable $ARCH_EXT_LIST
2611
2612 die_unknown(){
2613     echo "Unknown option \"$1\"."
2614     echo "See $0 --help for available options."
2615     exit 1
2616 }
2617
2618 print_3_columns() {
2619     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2620 }
2621
2622 show_list() {
2623     suffix=_$1
2624     shift
2625     echo $* | sed s/$suffix//g | print_3_columns
2626     exit 0
2627 }
2628
2629 rand_list(){
2630     IFS=', '
2631     set -- $*
2632     unset IFS
2633     for thing; do
2634         comp=${thing%:*}
2635         prob=${thing#$comp}
2636         prob=${prob#:}
2637         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2638         echo "prob ${prob:-0.5}"
2639         printf '%s\n' $comp
2640     done
2641 }
2642
2643 do_random(){
2644     action=$1
2645     shift
2646     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2647     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2648 }
2649
2650 for opt do
2651     optval="${opt#*=}"
2652     case "$opt" in
2653         --extra-ldflags=*)
2654             add_ldflags $optval
2655         ;;
2656         --extra-ldexeflags=*)
2657             add_ldexeflags $optval
2658         ;;
2659         --extra-libs=*)
2660             add_extralibs $optval
2661         ;;
2662         --disable-devices)
2663             disable $INDEV_LIST $OUTDEV_LIST
2664         ;;
2665         --enable-debug=*)
2666             debuglevel="$optval"
2667         ;;
2668         --disable-programs)
2669             disable $PROGRAM_LIST
2670         ;;
2671         --disable-everything)
2672             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2673         ;;
2674         --disable-all)
2675             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2676             disable $LIBRARY_LIST $PROGRAM_LIST doc
2677         ;;
2678         --enable-random|--disable-random)
2679             action=${opt%%-random}
2680             do_random ${action#--} $COMPONENT_LIST
2681         ;;
2682         --enable-random=*|--disable-random=*)
2683             action=${opt%%-random=*}
2684             do_random ${action#--} $optval
2685         ;;
2686         --enable-*=*|--disable-*=*)
2687             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2688             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2689             eval list=\$$(toupper $thing)_LIST
2690             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2691             $action $(filter "$name" $list)
2692         ;;
2693         --enable-avserver|--disable-avserver*)
2694             warn "avserver has been removed, the ${opt} option is only"\
2695                  "provided for compatibility and will be removed in the future"
2696         ;;
2697         --enable-?*|--disable-?*)
2698             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2699             if is_in $option $COMPONENT_LIST; then
2700                 test $action = disable && action=unset
2701                 eval $action \$$(toupper ${option%s})_LIST
2702             elif is_in $option $CMDLINE_SELECT; then
2703                 $action $option
2704             else
2705                 die_unknown $opt
2706             fi
2707         ;;
2708         --list-*)
2709             NAME="${opt#--list-}"
2710             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2711             NAME=${NAME%s}
2712             eval show_list $NAME \$$(toupper $NAME)_LIST
2713         ;;
2714         --help|-h) show_help
2715         ;;
2716         *)
2717             optname="${opt%%=*}"
2718             optname="${optname#--}"
2719             optname=$(echo "$optname" | sed 's/-/_/g')
2720             if is_in $optname $CMDLINE_SET; then
2721                 eval $optname='$optval'
2722             elif is_in $optname $CMDLINE_APPEND; then
2723                 append $optname "$optval"
2724             else
2725                 die_unknown $opt
2726             fi
2727         ;;
2728     esac
2729 done
2730
2731 for e in $env; do
2732     eval "export $e"
2733 done
2734
2735 disabled logging && logfile=/dev/null
2736
2737 # Disable all the library-specific components if the library itself
2738 # is disabled, see AVCODEC_LIST and following _LIST variables.
2739
2740 disable_components(){
2741     disabled ${1} && disable $(
2742         eval components="\$$(toupper ${1})_COMPONENTS"
2743         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2744     )
2745 }
2746
2747 map 'disable_components $v' $LIBRARY_LIST
2748
2749 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2750 set >> $logfile
2751
2752 case "$toolchain" in
2753     *-asan)
2754         cc_default="${toolchain%-asan}"
2755         add_cflags  -fsanitize=address
2756         add_ldflags -fsanitize=address
2757     ;;
2758     *-msan)
2759         cc_default="${toolchain%-msan}"
2760         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2761         add_ldflags -fsanitize=memory
2762     ;;
2763     *-tsan)
2764         cc_default="${toolchain%-tsan}"
2765         add_cflags  -fsanitize=thread -pie
2766         add_ldflags -fsanitize=thread -pie
2767         case "$toolchain" in
2768             gcc-tsan)
2769                 add_cflags  -fPIC
2770                 add_ldflags -fPIC
2771                 ;;
2772         esac
2773     ;;
2774     *-usan)
2775         cc_default="${toolchain%-usan}"
2776         add_cflags  -fsanitize=undefined
2777         add_ldflags -fsanitize=undefined
2778         case "$toolchain" in
2779             clang-usan)
2780                 add_cflags -O1
2781                 ;;
2782         esac
2783     ;;
2784     valgrind-*)
2785         target_exec_default="valgrind"
2786         case "$toolchain" in
2787             valgrind-massif)
2788                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2789                 ;;
2790             valgrind-memcheck)
2791                 target_exec_args="--track-origins=yes --leak-check=full"
2792                 ;;
2793         esac
2794     ;;
2795     msvc)
2796         # Check whether the current MSVC version needs the C99 converter.
2797         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2798         # support enough of C99 to build libav. Default to the new
2799         # behaviour if the regexp was unable to match anything, since this
2800         # successfully parses the version number of existing supported
2801         # versions that require the converter (MSVC 2010 and 2012).
2802         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2803         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2804             cc_default="cl"
2805         else
2806             cc_default="c99wrap cl"
2807         fi
2808         ld_default="$source_path/compat/windows/mslink"
2809         nm_default="dumpbin -symbols"
2810         ar_default="lib"
2811         case "$arch" in
2812         arm*)
2813             as_default="armasm"
2814             ;;
2815         esac
2816         target_os_default="win32"
2817         # Use a relative path for TMPDIR. This makes sure all the
2818         # ffconf temp files are written with a relative path, avoiding
2819         # issues with msys/win32 path conversion for MSVC parameters
2820         # such as -Fo<file> or -out:<file>.
2821         TMPDIR=.
2822     ;;
2823     icl)
2824         cc_default="icl"
2825         ld_default="xilink"
2826         nm_default="dumpbin -symbols"
2827         ar_default="xilib"
2828         target_os_default="win32"
2829         TMPDIR=.
2830     ;;
2831     gcov)
2832         add_cflags  -fprofile-arcs -ftest-coverage
2833         add_ldflags -fprofile-arcs -ftest-coverage
2834     ;;
2835     llvm-cov)
2836         add_cflags -fprofile-arcs -ftest-coverage
2837         add_ldflags --coverage
2838     ;;
2839     hardened)
2840         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2841         add_cflags   -fno-strict-overflow -fstack-protector-all
2842         add_ldflags  -Wl,-z,relro -Wl,-z,now
2843     ;;
2844     ?*)
2845         die "Unknown toolchain $toolchain"
2846     ;;
2847 esac
2848
2849 test -n "$cross_prefix" && enable cross_compile
2850
2851 if enabled cross_compile; then
2852     test -n "$arch" && test -n "$target_os" ||
2853         die "Must specify target arch and OS when cross-compiling"
2854 fi
2855
2856 ar_default="${cross_prefix}${ar_default}"
2857 cc_default="${cross_prefix}${cc_default}"
2858 occ_default="${cross_prefix}${occ_default}"
2859 nm_default="${cross_prefix}${nm_default}"
2860 pkg_config_default="${cross_prefix}${pkg_config_default}"
2861 ranlib="${cross_prefix}${ranlib}"
2862 strip="${cross_prefix}${strip}"
2863
2864 sysinclude_default="${sysroot}/usr/include"
2865
2866 set_default arch cc pkg_config sysinclude target_exec target_os
2867 enabled cross_compile || host_cc_default=$cc
2868 set_default host_cc
2869
2870 if ! $pkg_config --version >/dev/null 2>&1; then
2871     warn "$pkg_config not found, library detection may fail."
2872     pkg_config=false
2873 fi
2874
2875 exesuf() {
2876     case $1 in
2877         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2878     esac
2879 }
2880
2881 EXESUF=$(exesuf $target_os)
2882 HOSTEXESUF=$(exesuf $host_os)
2883
2884 # set temporary file name
2885 : ${TMPDIR:=$TEMPDIR}
2886 : ${TMPDIR:=$TMP}
2887 : ${TMPDIR:=/tmp}
2888
2889 if ! check_cmd mktemp -u XXXXXX; then
2890     # simple replacement for missing mktemp
2891     # NOT SAFE FOR GENERAL USE
2892     mktemp(){
2893         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2894     }
2895 fi
2896
2897 tmpfile(){
2898     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2899         (set -C; exec > $tmp) 2>/dev/null ||
2900         die "Unable to create temporary file in $TMPDIR."
2901     append TMPFILES $tmp
2902     eval $1=$tmp
2903 }
2904
2905 trap 'rm -f -- $TMPFILES' EXIT
2906
2907 tmpfile TMPASM .asm
2908 tmpfile TMPC   .c
2909 tmpfile TMPE   $EXESUF
2910 tmpfile TMPH   .h
2911 tmpfile TMPO   .o
2912 tmpfile TMPS   .S
2913 tmpfile TMPSH  .sh
2914 tmpfile TMPV   .ver
2915
2916 unset -f mktemp
2917
2918 chmod +x $TMPE
2919
2920 # make sure we can execute files in $TMPDIR
2921 cat > $TMPSH 2>> $logfile <<EOF
2922 #! /bin/sh
2923 EOF
2924 chmod +x $TMPSH >> $logfile 2>&1
2925 if ! $TMPSH >> $logfile 2>&1; then
2926     cat <<EOF
2927 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2928 variable to another directory and make sure that it is not mounted noexec.
2929 EOF
2930     die "Sanity test failed."
2931 fi
2932
2933 armasm_flags(){
2934     for flag; do
2935         case $flag in
2936             # Filter out MSVC cl.exe options from cflags that shouldn't
2937             # be passed to gas-preprocessor
2938             -M[TD]*)                                            ;;
2939             *)                  echo $flag                      ;;
2940         esac
2941    done
2942 }
2943
2944 ccc_flags(){
2945     for flag; do
2946         case $flag in
2947             -std=c99)           echo -c99                       ;;
2948             -mcpu=*)            echo -arch ${flag#*=}           ;;
2949             -mieee)             echo -ieee                      ;;
2950             -O*|-fast)          echo $flag                      ;;
2951             -fno-math-errno)    echo -assume nomath_errno       ;;
2952             -g)                 echo -g3                        ;;
2953             -Wall)              echo -msg_enable level2         ;;
2954             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
2955             -Wl,*)              echo $flag                      ;;
2956             -f*|-W*)                                            ;;
2957             *)                  echo $flag                      ;;
2958         esac
2959    done
2960 }
2961
2962 cparser_flags(){
2963     for flag; do
2964         case $flag in
2965             -Wno-switch)             echo -Wno-switch-enum ;;
2966             -Wno-format-zero-length) ;;
2967             -Wdisabled-optimization) ;;
2968             -Wno-pointer-sign)       echo -Wno-other ;;
2969             *)                       echo $flag ;;
2970         esac
2971     done
2972 }
2973
2974 msvc_common_flags(){
2975     for flag; do
2976         case $flag in
2977             # In addition to specifying certain flags under the compiler
2978             # specific filters, they must be specified here as well or else the
2979             # generic catch all at the bottom will print the original flag.
2980             -Wall)                ;;
2981             -std=c99)             ;;
2982             # Common flags
2983             -fomit-frame-pointer) ;;
2984             -g)                   echo -Z7 ;;
2985             -fno-math-errno)      ;;
2986             -fno-common)          ;;
2987             -fno-signed-zeros)    ;;
2988             -fPIC)                ;;
2989             -mthumb)              ;;
2990             -march=*)             ;;
2991             -lz)                  echo zlib.lib ;;
2992             -lavifil32)           echo vfw32.lib ;;
2993             -lavicap32)           echo vfw32.lib user32.lib ;;
2994             -lx264)               echo libx264.lib ;;
2995             -l*)                  echo ${flag#-l}.lib ;;
2996             -L*)                  echo -libpath:${flag#-L} ;;
2997             *)                    echo $flag ;;
2998         esac
2999     done
3000 }
3001
3002 msvc_flags(){
3003     msvc_common_flags "$@"
3004     for flag; do
3005         case $flag in
3006             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3007                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3008                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3009                                        -wd4273 -wd4554 -wd4701 ;;
3010         esac
3011     done
3012 }
3013
3014 icl_flags(){
3015     msvc_common_flags "$@"
3016     for flag; do
3017         case $flag in
3018             # Despite what Intel's documentation says -Wall, which is supported
3019             # on Windows, does enable remarks so disable them here.
3020             -Wall)                echo $flag -Qdiag-disable:remark ;;
3021             -std=c99)             echo -Qstd=c99 ;;
3022         esac
3023     done
3024 }
3025
3026 pgi_flags(){
3027     for flag; do
3028         case $flag in
3029             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3030             -fomit-frame-pointer) echo -Mnoframe ;;
3031             -g)                   echo -gopt ;;
3032             *)                    echo $flag ;;
3033         esac
3034     done
3035 }
3036
3037 suncc_flags(){
3038     for flag; do
3039         case $flag in
3040             -march=*|-mcpu=*)
3041                 case "${flag#*=}" in
3042                     native)                   echo -xtarget=native       ;;
3043                     v9|niagara)               echo -xarch=sparc          ;;
3044                     ultrasparc)               echo -xarch=sparcvis       ;;
3045                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3046                     i586|pentium)             echo -xchip=pentium        ;;
3047                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3048                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3049                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3050                     pentium4*)          echo -xtarget=pentium4           ;;
3051                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3052                     *-sse3)             echo -xarch=sse3                 ;;
3053                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3054                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3055                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3056                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3057                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3058                     k8|opteron|athlon64|athlon-fx)
3059                                                echo -xarch=sse2a         ;;
3060                     athlon*)                   echo -xarch=pentium_proa  ;;
3061                 esac
3062                 ;;
3063             -std=c99)             echo -xc99              ;;
3064             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3065             -fPIC)                echo -KPIC -xcode=pic32 ;;
3066             -W*,*)                echo $flag              ;;
3067             -f*-*|-W*|-mimpure-text)                      ;;
3068             -shared)              echo -G                 ;;
3069             *)                    echo $flag              ;;
3070         esac
3071     done
3072 }
3073
3074 tms470_flags(){
3075     for flag; do
3076         case $flag in
3077             -march=*|-mcpu=*)
3078                 case "${flag#*=}" in
3079                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3080                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3081                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3082                     armv6*|arm11*)          echo -mv=6   ;;
3083                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3084                                             echo -mv=5e  ;;
3085                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3086                 esac
3087                 ;;
3088             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3089             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3090             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3091             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3092             -msoft-float)   echo --float_support=vfplib       ;;
3093             -O[0-3]|-mf=*)  echo $flag                        ;;
3094             -g)             echo -g -mn                       ;;
3095             -pds=*)         echo $flag                        ;;
3096             -D*|-I*)        echo $flag                        ;;
3097             --gcc|--abi=*)  echo $flag                        ;;
3098             -me)            echo $flag                        ;;
3099         esac
3100     done
3101 }
3102
3103 probe_cc(){
3104     pfx=$1
3105     _cc=$2
3106
3107     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3108     unset _ld_o _ldflags _ld_lib _ld_path
3109     unset _depflags _DEPCMD _DEPFLAGS
3110     _flags_filter=echo
3111
3112     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3113         _type=llvm_gcc
3114         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3115         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3116         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3117         _cflags_speed='-O3'
3118         _cflags_size='-Os'
3119     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3120         _type=gcc
3121         gcc_version=$($_cc --version | head -n1)
3122         gcc_basever=$($_cc -dumpversion)
3123         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3124         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3125         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3126         if ! $_cc -dumpversion | grep -q '^2\.'; then
3127             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3128         fi
3129         _cflags_speed='-O3'
3130         _cflags_size='-Os'
3131     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3132         _type=icc
3133         _ident=$($_cc --version | head -n1)
3134         _depflags='-MMD'
3135         _cflags_speed='-O3'
3136         _cflags_size='-Os'
3137         _cflags_noopt='-O1'
3138     elif $_cc -v 2>&1 | grep -q xlc; then
3139         _type=xlc
3140         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3141         _cflags_speed='-O5'
3142         _cflags_size='-O5 -qcompact'
3143     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3144         _type=ccc
3145         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3146         _DEPFLAGS='-M'
3147         _cflags_speed='-fast'
3148         _cflags_size='-O1'
3149         _flags_filter=ccc_flags
3150     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3151         test -d "$sysroot" || die "No valid sysroot specified."
3152         _type=armcc
3153         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3154         armcc_conf="$PWD/armcc.conf"
3155         $_cc --arm_linux_configure                 \
3156              --arm_linux_config_file="$armcc_conf" \
3157              --configure_sysroot="$sysroot"        \
3158              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3159              die "Error creating armcc configuration file."
3160         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3161         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3162         as_default="${cross_prefix}gcc"
3163         _depflags='-MMD'
3164         _cflags_speed='-O3'
3165         _cflags_size='-Os'
3166     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3167         _type=tms470
3168         _ident=$($_cc -version | head -n1 | tr -s ' ')
3169         _flags='--gcc --abi=eabi -me'
3170         _cc_e='-ppl -fe=$@'
3171         _cc_o='-fe=$@'
3172         _depflags='-ppa -ppd=$(@:.o=.d)'
3173         _cflags_speed='-O3 -mf=5'
3174         _cflags_size='-O3 -mf=2'
3175         _flags_filter=tms470_flags
3176     elif $_cc -v 2>&1 | grep -q clang; then
3177         _type=clang
3178         _ident=$($_cc --version 2>/dev/null | head -n1)
3179         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3180         _cflags_speed='-O3'
3181         _cflags_size='-Os'
3182     elif $_cc -V 2>&1 | grep -q Sun; then
3183         _type=suncc
3184         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3185         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3186         _DEPFLAGS='-xM1 -xc99'
3187         _ldflags='-std=c99'
3188         _cflags_speed='-O5'
3189         _cflags_size='-O5 -xspace'
3190         _flags_filter=suncc_flags
3191     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3192         _type=pathscale
3193         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3194         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3195         _cflags_speed='-O2'
3196         _cflags_size='-Os'
3197         _flags_filter='filter_out -Wdisabled-optimization'
3198     elif $_cc -v 2>&1 | grep -q Open64; then
3199         _type=open64
3200         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3201         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3202         _cflags_speed='-O2'
3203         _cflags_size='-Os'
3204         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3205     elif $_cc -V 2>&1 | grep -q Portland; then
3206         _type=pgi
3207         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3208         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3209         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3210         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3211         _cflags_noopt="-O1"
3212         _flags_filter=pgi_flags
3213     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3214         _type=armasm
3215         _ident=$($_cc | head -n1)
3216         # 4509: "This form of conditional instruction is deprecated"
3217         _flags="-nologo -ignore 4509"
3218         _flags_filter=armasm_flags
3219     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3220         _type=msvc
3221         _ident=$($_cc 2>&1 | head -n1)
3222         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3223         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3224         _cflags_speed="-O2"
3225         _cflags_size="-O1"
3226         if $_cc -nologo- 2>&1 | grep -q Linker; then
3227             _ld_o='-out:$@'
3228         else
3229             _ld_o='-Fe$@'
3230         fi
3231         _cc_o='-Fo$@'
3232         _cc_e='-P -Fi$@'
3233         _flags_filter=msvc_flags
3234         _ld_lib='lib%.a'
3235         _ld_path='-libpath:'
3236         _flags='-nologo'
3237         _cflags='-D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS'
3238     elif $_cc 2>&1 | grep -q Intel; then
3239         _type=icl
3240         _ident=$($_cc 2>&1 | head -n1)
3241         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3242         # Not only is O3 broken on 13.x+ but it is slower on all previous
3243         # versions (tested) as well.
3244         _cflags_speed="-O2"
3245         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3246         if $_cc 2>&1 | grep -q Linker; then
3247             _ld_o='-out:$@'
3248         else
3249             _ld_o='-Fe$@'
3250         fi
3251         _cc_o='-Fo$@'
3252         _cc_e='-P'
3253         _flags_filter=icl_flags
3254         _ld_lib='lib%.a'
3255         _ld_path='-libpath:'
3256         # -Qdiag-error to make icl error when seeing certain unknown arguments
3257         _flags='-nologo -Qdiag-error:4044,10157'
3258         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3259         # with MSVC which enables it by default.
3260         _cflags='-D_USE_MATH_DEFINES -Qms0 -Qvec- -Qsimd- -GS'
3261     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3262         _type=cparser
3263         _ident=$($_cc --version | head -n1)
3264         _depflags='-MMD'
3265         _cflags_speed='-O4'
3266         _cflags_size='-O2'
3267         _flags_filter=cparser_flags
3268     fi
3269
3270     eval ${pfx}_type=\$_type
3271     eval ${pfx}_ident=\$_ident
3272 }
3273
3274 set_ccvars(){
3275     eval ${1}_C=\${_cc_c-\${${1}_C}}
3276     eval ${1}_E=\${_cc_e-\${${1}_E}}
3277     eval ${1}_O=\${_cc_o-\${${1}_O}}
3278
3279     if [ -n "$_depflags" ]; then
3280         eval ${1}_DEPFLAGS=\$_depflags
3281     else
3282         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3283         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3284         eval DEP${1}FLAGS=\$_flags
3285     fi
3286 }
3287
3288 probe_cc cc "$cc"
3289 cflags_filter=$_flags_filter
3290 cflags_speed=$_cflags_speed
3291 cflags_size=$_cflags_size
3292 cflags_noopt=$_cflags_noopt
3293 add_cflags $_flags $_cflags
3294 cc_ldflags=$_ldflags
3295 set_ccvars CC
3296
3297 probe_cc hostcc "$host_cc"
3298 host_cflags_filter=$_flags_filter
3299 add_host_cflags  $_flags $_cflags
3300 set_ccvars HOSTCC
3301
3302 test -n "$cc_type" && enable $cc_type ||
3303     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3304
3305 : ${as_default:=$cc}
3306 : ${objcc_default:=$cc}
3307 : ${dep_cc_default:=$cc}
3308 : ${ld_default:=$cc}
3309 : ${host_ld_default:=$host_cc}
3310 set_default ar as objcc dep_cc ld host_ld
3311
3312 probe_cc as "$as"
3313 asflags_filter=$_flags_filter
3314 add_asflags $_flags $_cflags
3315 set_ccvars AS
3316
3317 probe_cc objcc "$objcc"
3318 objcflags_filter=$_flags_filter
3319 add_objcflags $_flags $_cflags
3320 set_ccvars OBJC
3321
3322 probe_cc ld "$ld"
3323 ldflags_filter=$_flags_filter
3324 add_ldflags $_flags $_ldflags
3325 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3326 LD_O=${_ld_o-$LD_O}
3327 LD_LIB=${_ld_lib-$LD_LIB}
3328 LD_PATH=${_ld_path-$LD_PATH}
3329
3330 probe_cc hostld "$host_ld"
3331 host_ldflags_filter=$_flags_filter
3332 add_host_ldflags $_flags $_ldflags
3333 HOSTLD_O=${_ld_o-$HOSTLD_O}
3334
3335 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3336     probe_cc depcc "$dep_cc"
3337     CCDEP=${_DEPCMD:-$DEPCMD}
3338     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3339     DEPCCFLAGS=$_flags
3340 fi
3341
3342 if $ar 2>&1 | grep -q Microsoft; then
3343     arflags="-nologo"
3344     ar_o='-out:$@'
3345 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3346     arflags="rq"
3347     ar_o='$@'
3348 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3349     arflags='-Xany -r -c'
3350     ar_o='$@'
3351 else
3352     arflags="rc"
3353     ar_o='$@'
3354 fi
3355
3356 add_cflags $extra_cflags
3357 add_objcflags $extra_objcflags
3358 add_asflags $extra_cflags
3359
3360 if test -n "$sysroot"; then
3361     case "$cc_type" in
3362         gcc|llvm_gcc|clang)
3363             add_cppflags --sysroot="$sysroot"
3364             add_ldflags --sysroot="$sysroot"
3365         ;;
3366         tms470)
3367             add_cppflags -I"$sysinclude"
3368             add_ldflags  --sysroot="$sysroot"
3369         ;;
3370     esac
3371 fi
3372
3373 if test "$cpu" = host; then
3374     enabled cross_compile &&
3375         die "--cpu=host makes no sense when cross-compiling."
3376
3377     case "$cc_type" in
3378         gcc|llvm_gcc)
3379             check_native(){
3380                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3381                 sed -n "/cc1.*$1=/{
3382                             s/.*$1=\\([^ ]*\\).*/\\1/
3383                             p
3384                             q
3385                         }" $TMPE
3386             }
3387             cpu=$(check_native -march || check_native -mcpu)
3388         ;;
3389     esac
3390
3391     test "${cpu:-host}" = host &&
3392         die "--cpu=host not supported with compiler $cc"
3393 fi
3394
3395 # Deal with common $arch aliases
3396 case "$arch" in
3397     aarch64|arm64)
3398         arch="aarch64"
3399     ;;
3400     arm*)
3401         arch="arm"
3402     ;;
3403     mips*|IP*)
3404         case "$arch" in
3405         *el)
3406             add_cppflags -EL
3407             add_ldflags -EL
3408         ;;
3409         *eb)
3410             add_cppflags -EB
3411             add_ldflags -EB
3412         ;;
3413         esac
3414         arch="mips"
3415     ;;
3416     parisc*|hppa*)
3417         arch="parisc"
3418     ;;
3419     "Power Macintosh"|ppc*|powerpc*)
3420         arch="ppc"
3421     ;;
3422     s390|s390x)
3423         arch="s390"
3424     ;;
3425     sh4|sh)
3426         arch="sh4"
3427     ;;
3428     sun4u|sparc*)
3429         arch="sparc"
3430     ;;
3431     tilegx|tile-gx)
3432         arch="tilegx"
3433     ;;
3434     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3435         arch="x86"
3436     ;;
3437 esac
3438
3439 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3440 enable $arch
3441
3442 # Add processor-specific flags
3443 if enabled aarch64; then
3444
3445     case $cpu in
3446         armv*)
3447             cpuflags="-march=$cpu"
3448         ;;
3449         *)
3450             cpuflags="-mcpu=$cpu"
3451         ;;
3452     esac
3453
3454 elif enabled alpha; then
3455
3456     cpuflags="-mcpu=$cpu"
3457
3458 elif enabled arm; then
3459
3460     check_arm_arch() {
3461         check_cpp_condition stddef.h \
3462             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3463             $cpuflags
3464     }
3465
3466     probe_arm_arch() {
3467         if   check_arm_arch 4;        then echo armv4
3468         elif check_arm_arch 4T;       then echo armv4t
3469         elif check_arm_arch 5;        then echo armv5
3470         elif check_arm_arch 5E;       then echo armv5e
3471         elif check_arm_arch 5T;       then echo armv5t
3472         elif check_arm_arch 5TE;      then echo armv5te
3473         elif check_arm_arch 5TEJ;     then echo armv5te
3474         elif check_arm_arch 6;        then echo armv6
3475         elif check_arm_arch 6J;       then echo armv6j
3476         elif check_arm_arch 6K;       then echo armv6k
3477         elif check_arm_arch 6Z;       then echo armv6z
3478         elif check_arm_arch 6ZK;      then echo armv6zk
3479         elif check_arm_arch 6T2;      then echo armv6t2
3480         elif check_arm_arch 7;        then echo armv7
3481         elif check_arm_arch 7A  7_A;  then echo armv7-a
3482         elif check_arm_arch 7S;       then echo armv7-a
3483         elif check_arm_arch 7R  7_R;  then echo armv7-r
3484         elif check_arm_arch 7M  7_M;  then echo armv7-m
3485         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3486         elif check_arm_arch 8A  8_A;  then echo armv8-a
3487         fi
3488     }
3489
3490     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3491
3492     case $cpu in
3493         armv*)
3494             cpuflags="-march=$cpu"
3495             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3496         ;;
3497         *)
3498             cpuflags="-mcpu=$cpu"
3499             case $cpu in
3500                 cortex-a*)                               subarch=armv7a  ;;
3501                 cortex-r*)                               subarch=armv7r  ;;
3502                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3503                 arm11*)                                  subarch=armv6   ;;
3504                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3505                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3506                 *)                             subarch=$(probe_arm_arch) ;;
3507             esac
3508         ;;
3509     esac
3510
3511     case "$subarch" in
3512         armv5t*)    enable fast_clz                ;;
3513         armv[6-8]*) enable fast_clz fast_unaligned ;;
3514     esac
3515
3516 elif enabled avr32; then
3517
3518     case $cpu in
3519         ap7[02]0[0-2])
3520             subarch="avr32_ap"
3521             cpuflags="-mpart=$cpu"
3522         ;;
3523         ap)
3524             subarch="avr32_ap"
3525             cpuflags="-march=$cpu"
3526         ;;
3527         uc3[ab]*)
3528             subarch="avr32_uc"
3529             cpuflags="-mcpu=$cpu"
3530         ;;
3531         uc)
3532             subarch="avr32_uc"
3533             cpuflags="-march=$cpu"
3534         ;;
3535     esac
3536
3537 elif enabled bfin; then
3538
3539     cpuflags="-mcpu=$cpu"
3540
3541 elif enabled mips; then
3542
3543     cpuflags="-march=$cpu"
3544
3545 elif enabled ppc; then
3546
3547     disable ldbrx
3548
3549     case $(tolower $cpu) in
3550         601|ppc601|powerpc601)
3551             cpuflags="-mcpu=601"
3552             disable altivec
3553         ;;
3554         603*|ppc603*|powerpc603*)
3555             cpuflags="-mcpu=603"
3556             disable altivec
3557         ;;
3558         604*|ppc604*|powerpc604*)
3559             cpuflags="-mcpu=604"
3560             disable altivec
3561         ;;
3562         g3|75*|ppc75*|powerpc75*)
3563             cpuflags="-mcpu=750"
3564             disable altivec
3565         ;;
3566         g4|745*|ppc745*|powerpc745*)
3567             cpuflags="-mcpu=7450"
3568             disable vsx
3569         ;;
3570         74*|ppc74*|powerpc74*)
3571             cpuflags="-mcpu=7400"
3572             disable vsx
3573         ;;
3574         g5|970|ppc970|powerpc970)
3575             cpuflags="-mcpu=970"
3576             disable vsx
3577         ;;
3578         power[3-6]*)
3579             cpuflags="-mcpu=$cpu"
3580             disable vsx
3581         ;;
3582         power[7-8]*)
3583             cpuflags="-mcpu=$cpu"
3584             enable ldbrx
3585         ;;
3586         cell)
3587             cpuflags="-mcpu=cell"
3588             enable ldbrx
3589             disable vsx
3590         ;;
3591         e500mc)
3592             cpuflags="-mcpu=e500mc"
3593             disable altivec
3594         ;;
3595         e500v2)
3596             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3597             disable altivec
3598             disable dcbzl
3599         ;;
3600         e500)
3601             cpuflags="-mcpu=8540 -mhard-float"
3602             disable altivec
3603             disable dcbzl
3604         ;;
3605     esac
3606
3607 elif enabled sparc; then
3608
3609     case $cpu in
3610         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3611             cpuflags="-mcpu=$cpu"
3612         ;;
3613         ultrasparc*|niagara[234])
3614             cpuflags="-mcpu=$cpu"
3615         ;;
3616     esac
3617
3618 elif enabled x86; then
3619
3620     case $cpu in
3621         i[345]86|pentium)
3622             cpuflags="-march=$cpu"
3623             disable i686
3624             disable mmx
3625         ;;
3626         # targets that do NOT support nopl and conditional mov (cmov)
3627         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3628             cpuflags="-march=$cpu"
3629             disable i686
3630         ;;
3631         # targets that do support nopl and conditional mov (cmov)
3632         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3633             cpuflags="-march=$cpu"
3634             enable i686
3635             enable fast_cmov
3636         ;;
3637         # targets that do support conditional mov but on which it's slow
3638         pentium4|pentium4m|prescott|nocona)
3639             cpuflags="-march=$cpu"
3640             enable i686
3641             disable fast_cmov
3642         ;;
3643     esac
3644
3645 fi
3646
3647 if [ "$cpu" != generic ]; then
3648     add_cflags  $cpuflags
3649     add_asflags $cpuflags
3650     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3651 fi
3652
3653 # compiler sanity check
3654 check_exec <<EOF
3655 int main(void){ return 0; }
3656 EOF
3657 if test "$?" != 0; then
3658     echo "$cc is unable to create an executable file."
3659     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3660         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3661         echo "Only do this if you know what cross compiling means."
3662     fi
3663     die "C compiler test failed."
3664 fi
3665
3666 add_cppflags -D_ISOC99_SOURCE
3667 check_cflags -std=c99
3668 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3669 #include <stdlib.h>
3670 EOF
3671 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3672 #include <stdlib.h>
3673 EOF
3674
3675 add_host_cppflags -D_ISOC99_SOURCE
3676 check_host_cflags -std=c99
3677 check_host_cflags -Wall
3678 check_host_cflags -O3
3679
3680 check_64bit(){
3681     arch32=$1
3682     arch64=$2
3683     expr=$3
3684     check_code cc "" "int test[2*($expr) - 1]" &&
3685         subarch=$arch64 || subarch=$arch32
3686 }
3687
3688 case "$arch" in
3689     aarch64|alpha|ia64)
3690         spic=$shared
3691     ;;
3692     mips)
3693         check_64bit mips mips64 '_MIPS_SIM > 1'
3694         spic=$shared
3695     ;;
3696     parisc)
3697         check_64bit parisc parisc64 'sizeof(void *) > 4'
3698         spic=$shared
3699     ;;
3700     ppc)
3701         check_64bit ppc ppc64 'sizeof(void *) > 4'
3702         spic=$shared
3703     ;;
3704     s390)
3705         check_64bit s390 s390x 'sizeof(void *) > 4'
3706         spic=$shared
3707     ;;
3708     sparc)
3709         check_64bit sparc sparc64 'sizeof(void *) > 4'
3710         spic=$shared
3711     ;;
3712     x86)
3713         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3714         if test "$subarch" = "x86_64"; then
3715             spic=$shared
3716         fi
3717     ;;
3718 esac
3719
3720 enable $subarch
3721 enabled spic && enable_weak pic
3722
3723 # OS specific
3724 case $target_os in
3725     aix)
3726         SHFLAGS=-shared
3727         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3728         enabled shared && add_ldflags -Wl,-brtl
3729         ;;
3730     android)
3731         disable symver
3732         enable section_data_rel_ro
3733         SLIB_INSTALL_NAME='$(SLIBNAME)'
3734         SLIB_INSTALL_LINKS=
3735         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3736         ;;
3737     haiku)
3738         prefix_default="/boot/common"
3739         network_extralibs="-lnetwork"
3740         host_libs=
3741         ;;
3742     sunos)
3743         SHFLAGS='-shared -Wl,-h,$$(@F)'
3744         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3745         network_extralibs="-lsocket -lnsl"
3746         # When using suncc to build, the Solaris linker will mark
3747         # an executable with each instruction set encountered by
3748         # the Solaris assembler.  As our libraries contain their own
3749         # guards for processor-specific code, instead suppress
3750         # generation of the HWCAPS ELF section on Solaris x86 only.
3751         enabled_all suncc x86 &&
3752             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3753             add_ldflags -Wl,-M,mapfile
3754         nm_default='nm -P -g'
3755         SLIB_CREATE_DEF_CMD='$(Q)perl $(SRC_PATH)/compat/solaris/make_sunver.pl $$(filter %.ver,$$^) $(OBJS) | grep -v @ > $(SUBDIR)lib$(NAME).ver-sol2'
3756         ;;
3757     netbsd)
3758         disable symver
3759         oss_indev_extralibs="-lossaudio"
3760         oss_outdev_extralibs="-lossaudio"
3761         ;;
3762     openbsd|bitrig)
3763         disable symver
3764         SHFLAGS='-shared'
3765         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3766         SLIB_INSTALL_LINKS=
3767         oss_indev_extralibs="-lossaudio"
3768         oss_outdev_extralibs="-lossaudio"
3769         ;;
3770     dragonfly)
3771         disable symver
3772         ;;
3773     freebsd)
3774         ;;
3775     bsd/os)
3776         add_extralibs -lpoll -lgnugetopt
3777         ;;
3778     darwin)
3779         enabled ppc && add_asflags -force_cpusubtype_ALL
3780         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3781         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3782         add_ldflags -Wl,-dynamic,-search_paths_first
3783         SLIBSUF=".dylib"
3784         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
3785         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
3786         objformat="macho"
3787         enabled x86_64 && objformat="macho64"
3788         enabled_any pic shared ||
3789             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3790         check_header dispatch/dispatch.h &&
3791             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3792         ;;
3793     msys*)
3794         die "Native MSYS builds are discouraged, please use the MINGW environment."
3795         ;;
3796     mingw32*|mingw64*)
3797         if test $target_os = "mingw32ce"; then
3798             disable network
3799         else
3800             target_os=mingw32
3801         fi
3802         LIBTARGET=i386
3803         if enabled x86_64; then
3804             LIBTARGET="i386:x86-64"
3805         elif enabled arm; then
3806             LIBTARGET=arm-wince
3807         fi
3808         check_ldflags -Wl,--nxcompat
3809         check_ldflags -Wl,--dynamicbase
3810         shlibdir_default="$bindir_default"
3811         SLIBPREF=""
3812         SLIBSUF=".dll"
3813         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3814         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3815         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3816         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3817         SLIB_INSTALL_LINKS=
3818         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3819         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3820         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3821         objformat="win32"
3822         dlltool="${cross_prefix}dlltool"
3823         ranlib=:
3824         enable dos_paths
3825         ;;
3826     win32|win64)
3827         disable symver
3828         if enabled shared; then
3829             # Link to the import library instead of the normal static library
3830             # for shared libs.
3831             LD_LIB='%.lib'
3832             # Cannot build both shared and static libs with MSVC or icl.
3833             disable static
3834         fi
3835         shlibdir_default="$bindir_default"
3836         SLIBPREF=""
3837         SLIBSUF=".dll"
3838         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3839         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3840         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3841         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3842         SLIB_INSTALL_LINKS=
3843         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3844         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3845         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3846         objformat="win32"
3847         ranlib=:
3848         enable dos_paths
3849         ;;
3850     cygwin*)
3851         target_os=cygwin
3852         shlibdir_default="$bindir_default"
3853         SLIBPREF="cyg"
3854         SLIBSUF=".dll"
3855         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
3856         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
3857         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3858         SLIB_INSTALL_LINKS=
3859         SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
3860         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
3861         objformat="win32"
3862         enable dos_paths
3863         ;;
3864     *-dos|freedos|opendos)
3865         network_extralibs="-lsocket"
3866         objformat="coff"
3867         enable dos_paths
3868         add_cppflags -U__STRICT_ANSI__
3869         ;;
3870     linux)
3871         enable dv1394
3872         enable section_data_rel_ro
3873         ;;
3874     irix*)
3875         target_os=irix
3876         ranlib="echo ignoring ranlib"
3877         ;;
3878     os/2*)
3879         ln_s="cp -f"
3880         objformat="aout"
3881         add_cppflags -D_GNU_SOURCE
3882         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3883         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3884         LIBSUF="_s.a"
3885         SLIBPREF=""
3886         SLIBSUF=".dll"
3887         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3888         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3889         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3890             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3891             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3892             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3893             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3894         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3895             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3896         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3897         enable dos_paths
3898         ;;
3899     gnu/kfreebsd)
3900         add_cppflags -D_BSD_SOURCE
3901         ;;
3902     gnu)
3903         ;;
3904     qnx)
3905         add_cppflags -D_QNX_SOURCE
3906         network_extralibs="-lsocket"
3907         ;;
3908     symbian)
3909         SLIBSUF=".dll"
3910         enable dos_paths
3911         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3912         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3913         add_ldflags -Wl,--target1-abs,--no-undefined \
3914                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3915                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3916         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3917                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3918                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3919         ;;
3920     osf1)
3921         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3922         ;;
3923     minix)
3924         ;;
3925     plan9)
3926         add_cppflags -D_C99_SNPRINTF_EXTENSION  \
3927                      -D_REENTRANT_SOURCE        \
3928                      -D_RESEARCH_SOURCE         \
3929                      -DFD_SETSIZE=96            \
3930                      -DHAVE_SOCK_OPTS
3931         add_compat strtod.o strtod=avpriv_strtod
3932         network_extralibs='-lbsd'
3933         exeobjs=compat/plan9/main.o
3934         cp_f='cp'
3935         ;;
3936     none)
3937         ;;
3938     *)
3939         die "Unknown OS '$target_os'."
3940         ;;
3941 esac
3942
3943 # determine libc flavour
3944
3945 probe_libc(){
3946     pfx=$1
3947     pfx_no_=${pfx%_}
3948     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
3949     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
3950         eval ${pfx}libc_type=uclibc
3951         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3952     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
3953         eval ${pfx}libc_type=glibc
3954         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
3955     # MinGW headers can be installed on Cygwin, so check for newlib first.
3956     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
3957         eval ${pfx}libc_type=newlib
3958         add_${pfx}cppflags -U__STRICT_ANSI__
3959     # MinGW64 is backwards compatible with MinGW32, so check for it first.
3960     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
3961         eval ${pfx}libc_type=mingw64
3962         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3963         eval test \$${pfx_no_}cc_type = "gcc" &&
3964             add_${pfx}cppflags -D__printf__=__gnu_printf__
3965     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
3966          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
3967         eval ${pfx}libc_type=mingw32
3968         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
3969             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
3970             die "ERROR: MinGW32 runtime version must be >= 3.15."
3971         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
3972         eval test \$${pfx_no_}cc_type = "gcc" &&
3973             add_${pfx}cppflags -D__printf__=__gnu_printf__
3974     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
3975         eval ${pfx}libc_type=msvcrt
3976         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
3977             if [ "$pfx" = host_ ]; then
3978                 add_host_cppflags -Dsnprintf=_snprintf
3979             else
3980                 add_compat strtod.o strtod=avpriv_strtod
3981                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
3982                                              _snprintf=avpriv_snprintf  \
3983                                              vsnprintf=avpriv_vsnprintf
3984             fi
3985         fi
3986         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
3987         # 0x601 by default unless something else is set by the user.
3988         # This can easily lead to us detecting functions only present
3989         # in such new versions and producing binaries requiring windows 7.0.
3990         # Therefore explicitly set the default to XP unless the user has
3991         # set something else on the command line.
3992         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
3993         # family. For these cases, configure is free to use any functions
3994         # found in the SDK headers by default. (Alternatively, we could force
3995         # _WIN32_WINNT to 0x0602 in that case.)
3996         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
3997             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
3998 #ifdef WINAPI_FAMILY
3999 #include <winapifamily.h>
4000 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4001 #error not desktop
4002 #endif
4003 #endif
4004 EOF
4005     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4006         eval ${pfx}libc_type=klibc
4007     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4008         eval ${pfx}libc_type=bionic
4009     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4010         eval ${pfx}libc_type=solaris
4011         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4012     else
4013         eval ${pfx}libc_type=default
4014         add_${pfx}cppflags -D_DEFAULT_SOURCE
4015     fi
4016 }
4017
4018 probe_libc
4019 test -n "$libc_type" && enable libc_$libc_type
4020 probe_libc host_
4021 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4022
4023 case $libc_type in
4024     bionic)
4025         add_compat strtod.o strtod=avpriv_strtod
4026         ;;
4027 esac
4028
4029 # hacks for compiler/libc/os combinations
4030
4031 if enabled_all tms470 libc_glibc; then
4032     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4033     add_cppflags -D__USER_LABEL_PREFIX__=
4034     add_cppflags -D__builtin_memset=memset
4035     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4036     add_cflags   -pds=48    # incompatible redefinition of macro
4037 fi
4038
4039 if enabled_all ccc libc_glibc; then
4040     add_ldflags -Wl,-z,now  # calls to libots crash without this
4041 fi
4042
4043 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4044     add_cppflags '-I\$(SRC_PATH)/compat/float'
4045
4046 esc(){
4047     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4048 }
4049
4050 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4051
4052 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4053
4054 set_default $PATHS_LIST
4055 set_default nm
4056
4057 # we need to build at least one lib type
4058 if ! enabled_any static shared; then
4059     cat <<EOF
4060 At least one library type must be built.
4061 Specify --enable-static to build the static libraries or --enable-shared to
4062 build the shared libraries as well. To only build the shared libraries specify
4063 --disable-static in addition to --enable-shared.
4064 EOF
4065     exit 1
4066 fi
4067
4068 die_license_disabled() {
4069     enabled $1 || { enabled $2 && die "$2 is $1 and --enable-$1 is not specified."; }
4070 }
4071
4072 die_license_disabled gpl libcdio
4073 die_license_disabled gpl libx264
4074 die_license_disabled gpl libx265
4075 die_license_disabled gpl libxavs
4076 die_license_disabled gpl libxvid
4077 die_license_disabled gpl x11grab
4078
4079 die_license_disabled nonfree cuda
4080 die_license_disabled nonfree libfaac
4081 die_license_disabled nonfree libfdk_aac
4082 die_license_disabled nonfree libnpp
4083 die_license_disabled nonfree nvenc
4084 die_license_disabled nonfree openssl
4085
4086 die_license_disabled version3 libopencore_amrnb
4087 die_license_disabled version3 libopencore_amrwb
4088 die_license_disabled version3 libvo_aacenc
4089 die_license_disabled version3 libvo_amrwbenc
4090
4091 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
4092
4093 disabled optimizations || check_cflags -fomit-frame-pointer
4094
4095 enable_weak_pic() {
4096     disabled pic && return
4097     enable pic
4098     add_cppflags -DPIC
4099     case "$target_os" in
4100     mingw*|cygwin*)
4101         ;;
4102     *)
4103         add_cflags -fPIC
4104         ;;
4105     esac
4106     add_asflags  -fPIC
4107 }
4108
4109 enabled pic && enable_weak_pic
4110
4111 check_cc <<EOF || die "Symbol mangling check failed."
4112 int ff_extern;
4113 EOF
4114 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4115 extern_prefix=${sym%%ff_extern*}
4116
4117 check_cc <<EOF && enable_weak inline_asm
4118 void foo(void) { __asm__ volatile ("" ::); }
4119 EOF
4120
4121 _restrict=
4122 for restrict_keyword in restrict __restrict__ __restrict; do
4123     check_cc <<EOF && _restrict=$restrict_keyword && break
4124 void foo(char * $restrict_keyword p);
4125 EOF
4126 done
4127
4128 check_cc <<EOF && enable pragma_deprecated
4129 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4130 EOF
4131
4132 check_cc <<EOF && enable attribute_packed
4133 struct { int x; } __attribute__((packed)) x;
4134 EOF
4135
4136 check_cc <<EOF && enable attribute_may_alias
4137 union { int x; } __attribute__((may_alias)) x;
4138 EOF
4139
4140 check_cc <<EOF || die "endian test failed"
4141 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4142 EOF
4143 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4144
4145 check_gas() {
4146     log "check_gas using '$as' as AS"
4147     # :vararg is used on aarch64, arm and ppc altivec
4148     check_as <<EOF || return 1
4149 .macro m n, y:vararg=0
4150 \n: .int \y
4151 .endm
4152 m x
4153 EOF
4154     # .altmacro is only used in arm asm
4155     ! enabled arm || check_as <<EOF || return 1
4156 .altmacro
4157 EOF
4158     enable gnu_as
4159     return 0
4160 }
4161
4162 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4163     nogas=:
4164     enabled_any arm aarch64 && nogas=die
4165     enabled_all ppc altivec && nogas=warn
4166     as_noop=-v
4167
4168     case $as_type in
4169         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4170         gcc)  gaspp_as_type=gas ;;
4171         *)    gaspp_as_type=$as_type ;;
4172     esac
4173
4174     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4175
4176     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4177         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4178
4179     if ! check_gas ; then
4180         as=${gas:=$as}
4181         check_gas || \
4182             $nogas "GNU assembler not found, install/update gas-preprocessor"
4183     fi
4184
4185     check_as <<EOF && enable as_func
4186 .func test
4187 .endfunc
4188 EOF
4189 fi
4190
4191 check_inline_asm inline_asm_labels '"1:\n"'
4192
4193 if enabled aarch64; then
4194     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4195     # internal assembler in clang 3.3 does not support this instruction
4196     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4197     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4198
4199     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4200
4201 elif enabled alpha; then
4202
4203     check_cflags -mieee
4204
4205 elif enabled arm; then
4206
4207     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4208     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4209     enabled thumb && check_cflags -mthumb || check_cflags -marm
4210
4211     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4212         enable vfp_args
4213     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4214         enable vfp_args
4215     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4216         case "${cross_prefix:-$cc}" in
4217             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4218             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4219 __asm__ (".eabi_attribute 28, 1");
4220 int main(void) { return 0; }
4221 EOF
4222         esac
4223         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4224     fi
4225
4226     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4227     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4228     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4229     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4230     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4231     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4232
4233     [ $target_os = linux ] || [ $target_os = android ] ||
4234         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4235             $ARCH_EXT_LIST_ARM
4236
4237     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4238
4239     check_as <<EOF && enable as_dn_directive
4240 ra .dn d0.i16
4241 .unreq ra
4242 EOF
4243
4244     # llvm's integrated assembler supports .object_arch from llvm 3.5
4245     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4246 .object_arch armv4
4247 EOF
4248
4249     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4250
4251 elif enabled mips; then
4252
4253     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4254
4255     # make sure that only an instruction set is enabled
4256     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4257
4258     if enabled mips64; then
4259         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4260             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4261                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4262     else
4263         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4264             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4265                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4266     fi
4267
4268 elif enabled parisc; then
4269
4270     if enabled gcc; then
4271         case $($cc -dumpversion) in
4272             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4273         esac
4274     fi
4275
4276 elif enabled ppc; then
4277
4278     enable local_aligned_8 local_aligned_16
4279
4280     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4281     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4282     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4283     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4284
4285     # AltiVec flags: The FSF version of GCC differs from the Apple version
4286     if enabled altivec; then
4287         check_cflags -maltivec -mabi=altivec &&
4288         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4289         check_cflags -faltivec
4290
4291         # check if our compiler supports Motorola AltiVec C API
4292         check_cc <<EOF || disable altivec
4293 $inc_altivec_h
4294 int main(void) {
4295     vector signed int v1 = (vector signed int) { 0 };
4296     vector signed int v2 = (vector signed int) { 1 };
4297     v1 = vec_add(v1, v2);
4298     return 0;
4299 }
4300 EOF
4301
4302         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4303     fi
4304
4305     if enabled vsx; then
4306         check_cflags -mvsx &&
4307         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4308     fi
4309
4310     if enabled power8; then
4311         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4312     fi
4313
4314 elif enabled x86; then
4315
4316     check_builtin rdtsc    intrin.h   "__rdtsc()"
4317     check_builtin mm_empty mmintrin.h "_mm_empty()"
4318
4319     enable local_aligned_8 local_aligned_16
4320
4321     # check whether EBP is available on x86
4322     # As 'i' is stored on the stack, this program will crash
4323     # if the base pointer is used to access it because the
4324     # base pointer is cleared in the inline assembly code.
4325     check_exec_crash <<EOF && enable ebp_available
4326 volatile int i=0;
4327 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4328 return i;
4329 EOF
4330
4331     # check whether EBX is available on x86
4332     check_inline_asm ebx_available '""::"b"(0)' &&
4333         check_inline_asm ebx_available '"":::"%ebx"'
4334
4335     # check whether xmm clobbers are supported
4336     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4337
4338     # check whether binutils is new enough to compile SSSE3/MMXEXT
4339     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4340     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4341
4342     if ! disabled_any asm mmx yasm; then
4343         if check_cmd $yasmexe --version; then
4344             enabled x86_64 && yasm_extra="-m amd64"
4345             yasm_debug="-g dwarf2"
4346         elif check_cmd nasm -v; then
4347             yasmexe=nasm
4348             yasm_debug="-g -F dwarf"
4349             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4350         fi
4351
4352         YASMFLAGS="-f $objformat $yasm_extra"
4353         enabled pic               && append YASMFLAGS "-DPIC"
4354         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4355         case "$objformat" in
4356             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4357         esac
4358
4359         check_yasm "movbe ecx, [5]" && enable yasm ||
4360             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4361         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4362         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4363         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4364         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4365         check_yasm "CPU amdnop" || disable cpunop
4366     fi
4367
4368     case "$cpu" in
4369         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4370             disable fast_clz
4371         ;;
4372     esac
4373
4374 fi
4375
4376 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4377
4378 check_ldflags -Wl,--as-needed
4379
4380 if check_func dlopen; then
4381     ldl=
4382 elif check_func dlopen -ldl; then
4383     ldl=-ldl
4384 fi
4385
4386 if ! disabled network; then
4387     check_func getaddrinfo $network_extralibs
4388     check_func inet_aton $network_extralibs
4389
4390     check_type netdb.h "struct addrinfo"
4391     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4392     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4393     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4394     check_type poll.h "struct pollfd"
4395     check_type netinet/sctp.h "struct sctp_event_subscribe"
4396     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4397     check_type netinet/in.h "struct sockaddr_in6"
4398     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4399     check_type "sys/types.h sys/socket.h" socklen_t
4400
4401     # Prefer arpa/inet.h over winsock2
4402     if check_header arpa/inet.h ; then
4403         check_func closesocket
4404     elif check_header winsock2.h ; then
4405         check_func_headers winsock2.h closesocket -lws2 &&
4406             network_extralibs="-lws2" ||
4407         { check_func_headers winsock2.h closesocket -lws2_32 &&
4408             network_extralibs="-lws2_32"; } || disable winsock2_h network
4409         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4410
4411         check_type ws2tcpip.h socklen_t
4412         check_type ws2tcpip.h "struct addrinfo"
4413         check_type ws2tcpip.h "struct group_source_req"
4414         check_type ws2tcpip.h "struct ip_mreq_source"
4415         check_type ws2tcpip.h "struct ipv6_mreq"
4416         check_type winsock2.h "struct pollfd"
4417         check_struct winsock2.h "struct sockaddr" sa_len
4418         check_type ws2tcpip.h "struct sockaddr_in6"
4419         check_type ws2tcpip.h "struct sockaddr_storage"
4420     else
4421         disable network
4422     fi
4423 fi
4424
4425 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4426 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4427 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4428 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4429
4430 case "$custom_allocator" in
4431     jemalloc)
4432         # jemalloc by default does not use a prefix
4433         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4434     ;;
4435     tcmalloc)
4436         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4437         malloc_prefix=tc_
4438     ;;
4439 esac
4440
4441 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4442 check_func  ${malloc_prefix}memalign            && enable memalign
4443 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4444
4445 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4446     check_func_headers time.h clock_gettime || { check_func_headers time.h clock_gettime -lrt && add_extralibs -lrt && LIBRT="-lrt"; }
4447
4448 check_func  fcntl
4449 check_func  fork
4450 check_func  gethrtime
4451 check_func  getopt
4452 check_func  getrusage
4453 check_func  gettimeofday
4454 check_func  gmtime_r
4455 check_func  isatty
4456 check_func  localtime_r
4457 check_func  mach_absolute_time
4458 check_func  mkstemp
4459 check_func  mmap
4460 check_func  mprotect
4461 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4462 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4463 check_func  sched_getaffinity
4464 check_func  setrlimit
4465 check_func  strerror_r
4466 check_func  sysconf
4467 check_func  sysctl
4468 check_func  usleep
4469
4470 check_func_headers io.h setmode
4471 check_func_headers stdlib.h getenv
4472
4473 check_func_headers windows.h CoTaskMemFree -lole32
4474 check_func_headers windows.h GetProcessAffinityMask
4475 check_func_headers windows.h GetProcessTimes
4476 check_func_headers windows.h GetSystemTimeAsFileTime
4477 check_func_headers windows.h LoadLibrary
4478 check_func_headers windows.h MapViewOfFile
4479 check_func_headers windows.h SetConsoleTextAttribute
4480 check_func_headers windows.h Sleep
4481 check_func_headers windows.h VirtualAlloc
4482 check_struct windows.h "CONDITION_VARIABLE" Ptr
4483
4484 check_header direct.h
4485 check_header dlfcn.h
4486 check_header d3d11.h
4487 check_header dxva.h
4488 check_header dxva2api.h
4489 check_header io.h
4490 check_header mach/mach_time.h
4491 check_header malloc.h
4492 check_header poll.h
4493 check_header sys/mman.h
4494 check_header sys/param.h
4495 check_header sys/resource.h
4496 check_header sys/select.h
4497 check_header sys/time.h
4498 check_header sys/un.h
4499 check_header unistd.h
4500 check_header valgrind/valgrind.h
4501 check_header vdpau/vdpau.h
4502 check_header vdpau/vdpau_x11.h
4503 check_header VideoDecodeAcceleration/VDADecoder.h
4504 check_header windows.h
4505 check_header X11/extensions/XvMClib.h
4506
4507 check_lib2 "windows.h shellapi.h" CommandLineToArgvW -lshell32
4508 check_lib2 "windows.h wincrypt.h" CryptGenRandom -ladvapi32
4509 check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
4510
4511 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4512
4513 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4514 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4515 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4516
4517 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4518 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4519 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4520 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4521
4522 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4523
4524 if ! disabled w32threads && ! enabled pthreads; then
4525     check_func_headers "windows.h process.h" _beginthreadex &&
4526         enable w32threads || disable w32threads
4527 fi
4528
4529 # check for some common methods of building with pthread support
4530 # do this before the optional library checks as some of them require pthreads
4531 if ! disabled pthreads && ! enabled w32threads; then
4532     enable pthreads
4533     if check_func pthread_join -pthread; then
4534         add_cflags -pthread
4535         add_extralibs -pthread
4536     elif check_func pthread_join -pthreads; then
4537         add_cflags -pthreads
4538         add_extralibs -pthreads
4539     elif check_func pthread_join -lpthreadGC2; then
4540         add_extralibs -lpthreadGC2
4541     elif check_lib pthread.h pthread_join -lpthread; then
4542         :
4543     elif ! check_func pthread_join; then
4544         disable pthreads
4545     fi
4546 fi
4547
4548 enabled pthreads &&
4549     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4550
4551 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
4552 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4553
4554 check_lib math.h sin -lm && LIBM="-lm"
4555 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4556
4557 atan2f_args=2
4558 ldexpf_args=2
4559 powf_args=2
4560
4561 for func in $MATH_FUNCS; do
4562     eval check_mathfunc $func \${${func}_args:-1}
4563 done
4564
4565 # these are off by default, so fail if requested and not available
4566 enabled avisynth          && { check_lib2 "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4567                                check_lib2 "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4568                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4569 enabled cuda              && check_lib cuda.h cuInit -lcuda
4570 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4571 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4572 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4573 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4574 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4575 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4576 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4577 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4578 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4579                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4580                                done || die "ERROR: libgsm not found"; }
4581 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4582 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4583 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4584 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4585 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4586 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4587 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4588 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4589 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4590 enabled libopenjpeg       && { { check_header openjpeg.h && check_lib2 openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC; } ||
4591                                { require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; } }
4592 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4593 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4594 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4595 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4596 enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
4597 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4598 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4599 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4600 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4601 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4602 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4603 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4604     enabled libvpx_vp8_decoder && {
4605         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4606             disable libvpx_vp8_decoder;
4607     }
4608     enabled libvpx_vp8_encoder && {
4609         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4610             disable libvpx_vp8_encoder;
4611     }
4612     enabled libvpx_vp9_decoder && {
4613         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4614             disable libvpx_vp9_decoder;
4615     }
4616     enabled libvpx_vp9_encoder && {
4617         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4618             disable libvpx_vp9_encoder;
4619     }
4620     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4621         die "libvpx enabled but no supported decoders found"
4622     fi
4623 }
4624 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4625 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4626 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4627                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4628                                die "ERROR: libx264 version must be >= 0.118."; } &&
4629                              { check_cpp_condition x264.h "X264_MPEG2" &&
4630                                enable libx262; }
4631 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4632                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4633                                die "ERROR: libx265 version must be >= 57."; }
4634 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
4635 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4636 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4637                                 { ! enabled cross_compile && {
4638                                     add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
4639                                     add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
4640                                     check_lib interface/mmal/mmal.h mmal_port_connect ; }
4641                                 check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
4642                                die "ERROR: mmal not found"; }
4643 enabled mmal && check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"
4644 enabled omx_rpi && enable omx
4645 enabled omx               && { check_header OMX_Core.h ||
4646                                 { ! enabled cross_compile && enabled omx_rpi && {
4647                                     add_cflags -isystem/opt/vc/include/IL ; }
4648                                 check_header OMX_Core.h ; } ||
4649                                die "ERROR: OpenMAX IL headers not found"; }
4650 enabled openssl           && { check_pkg_config openssl openssl/ssl.h SSL_library_init && {
4651                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4652                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4653                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4654                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4655                                die "ERROR: openssl not found"; }
4656
4657 if enabled gnutls; then
4658     { check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
4659     { check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
4660 fi
4661
4662 # libdc1394 check
4663 if enabled libdc1394; then
4664     { require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new &&
4665         enable libdc1394_2; } ||
4666     { check_lib libdc1394/dc1394_control.h dc1394_create_handle -ldc1394_control -lraw1394 &&
4667         enable libdc1394_1; } ||
4668     die "ERROR: No version of libdc1394 found "
4669 fi
4670
4671 if enabled nvenc; then
4672     enabled cuda || check_header cuda.h || die "ERROR: cuda.h not found."
4673     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4674     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 5" ||
4675         die "ERROR: NVENC API version 4 or older is not supported"
4676 fi
4677
4678 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4679     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4680     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4681     enable sdl
4682 fi
4683
4684 pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
4685 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html
4686
4687 check_header linux/fb.h
4688 check_header linux/videodev2.h
4689 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4690
4691 check_header AVFoundation/AVFoundation.h &&
4692     check_objcflags -fobjc-arc &&
4693     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4694     disable AVFoundation_AVFoundation_h
4695
4696 check_header sys/videoio.h
4697
4698 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4699 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4700 # w32api 3.12 had it defined wrong
4701 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4702
4703 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4704 { check_header dev/bktr/ioctl_meteor.h &&
4705   check_header dev/bktr/ioctl_bt848.h; } ||
4706 { check_header machine/ioctl_meteor.h &&
4707   check_header machine/ioctl_bt848.h; } ||
4708 { check_header dev/video/meteor/ioctl_meteor.h &&
4709   check_header dev/video/bktr/ioctl_bt848.h; } ||
4710 check_header dev/ic/bt8xx.h
4711
4712 check_header sndio.h
4713 check_header sys/soundcard.h
4714 check_header soundcard.h
4715
4716 enabled_any alsa_indev alsa_outdev &&
4717     check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
4718
4719 enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack &&
4720     check_func jack_port_get_latency_range -ljack
4721
4722 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio
4723
4724 if enabled libcdio; then
4725     check_lib2 "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4726     check_lib2 "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4727     die "ERROR: No usable libcdio/cdparanoia found"
4728 fi
4729
4730 check_lib X11/Xlib.h XOpenDisplay -lX11 && enable xlib
4731
4732 if enabled libxcb || enabled x11grab && ! disabled libxcb; then
4733     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4734         enabled libxcb && die "ERROR: libxcb not found";
4735     } && disable x11grab && enable libxcb
4736
4737     disabled libxcb_shm ||
4738         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4739             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4740         } && check_header sys/shm.h && enable libxcb_shm
4741
4742     disabled libxcb_xfixes ||
4743         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4744             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4745         } && enable libxcb_xfixes
4746
4747     add_cflags "$xcb_event_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4748     add_extralibs "$xcb_event_libs $xcb_shm_libs $xcb_xfixes_libs"
4749 fi
4750
4751 if enabled x11grab; then
4752     enabled xlib || die "ERROR: Xlib not found"
4753     require Xext X11/extensions/XShm.h XShmCreateImage -lXext
4754     require Xfixes X11/extensions/Xfixes.h XFixesGetCursorImage -lXfixes
4755 fi
4756
4757 enabled vaapi &&
4758     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4759     disable vaapi
4760
4761 if enabled vaapi ; then
4762     enabled xlib &&
4763     check_lib2 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 &&
4764     enable vaapi_x11
4765
4766     check_lib2 "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4767     enable vaapi_drm
4768 fi
4769
4770 enabled vdpau &&
4771     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4772     disable vdpau
4773
4774 enabled vdpau && enabled xlib &&
4775     check_func_headers "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau &&
4776     prepend avconv_libs $($ldflags_filter "-lvdpau") &&
4777     enable vdpau_x11
4778
4779 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4780
4781 # add some useful compiler flags if supported
4782 check_cflags -Wdeclaration-after-statement
4783 check_cflags -Wall
4784 check_cflags -Wdisabled-optimization
4785 check_cflags -Wpointer-arith
4786 check_cflags -Wredundant-decls
4787 check_cflags -Wwrite-strings
4788 check_cflags -Wtype-limits
4789 check_cflags -Wundef
4790 check_cflags -Wmissing-prototypes
4791 check_cflags -Wstrict-prototypes
4792 enabled extra_warnings && check_cflags -Winline
4793 enabled extra_warnings && check_cflags -Wcast-qual
4794
4795 check_disable_warning(){
4796     warning_flag=-W${1#-Wno-}
4797     test_cflags $warning_flag && add_cflags $1
4798 }
4799
4800 check_disable_warning -Wno-parentheses
4801 check_disable_warning -Wno-switch
4802 check_disable_warning -Wno-format-zero-length
4803 check_disable_warning -Wno-pointer-sign
4804
4805 # add some linker flags
4806 check_ldflags -Wl,--warn-common
4807 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4808 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4809 test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
4810
4811 # add some strip flags
4812 # -wN '..@*' is more selective than -x, but not available everywhere.
4813 check_stripflags -wN \'..@*\' || check_stripflags -x || strip='true'
4814
4815 enabled neon_clobber_test &&
4816