configure: Separate package name and version requirements in helper functions
[libav.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-outdevs           show all available output devices
77   --list-filters           show all available filters
78
79 Standard options:
80   --logfile=FILE           log tests and output to FILE [config.log]
81   --disable-logging        do not log configure debug information
82   --prefix=PREFIX          install in PREFIX [$prefix_default]
83   --bindir=DIR             install binaries in DIR [PREFIX/bin]
84   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
85   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
86   --libdir=DIR             install libs in DIR [PREFIX/lib]
87   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
88   --incdir=DIR             install includes in DIR [PREFIX/include]
89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
90   --enable-rpath           use rpath when linking programs (USE WITH CARE)
91
92 Licensing options:
93   --enable-gpl             allow use of GPL code, the resulting libs
94                            and binaries will be under GPL [no]
95   --enable-version3        upgrade (L)GPL to version 3 [no]
96   --enable-nonfree         allow use of nonfree code, the resulting libs
97                            and binaries will be unredistributable [no]
98
99 Configuration options:
100   --disable-static         do not build static libraries [no]
101   --enable-shared          build shared libraries [no]
102   --enable-small           optimize for size instead of speed
103   --enable-runtime-cpudetect detect CPU capabilities at runtime (bigger binary)
104   --enable-gray            enable full grayscale support (slower color)
105   --disable-swscale-alpha  disable alpha channel support in swscale
106   --disable-all            disable building components, libraries and programs
107
108 Program options:
109   --disable-programs       do not build command line programs
110   --disable-avconv         disable avconv build
111   --disable-avplay         disable avplay build
112   --disable-avprobe        disable avprobe build
113   --disable-avserver       deprecated, does nothing
114
115 Component options:
116   --disable-doc            do not build documentation
117   --disable-pod2man        do not build manual pages
118   --disable-texi2html      do not build HTML documentation
119   --disable-avdevice       disable libavdevice build
120   --disable-avcodec        disable libavcodec build
121   --disable-avformat       disable libavformat build
122   --disable-avutil         disable libavutil build
123   --disable-swscale        disable libswscale build
124   --disable-avfilter       disable video filter support [no]
125   --disable-avresample     disable libavresample build [no]
126   --disable-pthreads       disable pthreads [auto]
127   --disable-w32threads     disable Win32 threads [auto]
128   --disable-network        disable network support [no]
129   --disable-dct            disable DCT code
130   --disable-error-resilience disable error resilience code
131   --disable-lsp            disable LSP code
132   --disable-lzo            disable LZO decoder code
133   --disable-mdct           disable MDCT code
134   --disable-rdft           disable RDFT code
135   --disable-fft            disable FFT code
136   --disable-faan           disable floating point AAN (I)DCT code
137
138 Individual component options:
139   --disable-everything     disable all components listed below
140   --disable-encoder=NAME   disable encoder NAME
141   --enable-encoder=NAME    enable encoder NAME
142   --disable-encoders       disable all encoders
143   --disable-decoder=NAME   disable decoder NAME
144   --enable-decoder=NAME    enable decoder NAME
145   --disable-decoders       disable all decoders
146   --disable-hwaccel=NAME   disable hwaccel NAME
147   --enable-hwaccel=NAME    enable hwaccel NAME
148   --disable-hwaccels       disable all hwaccels
149   --disable-muxer=NAME     disable muxer NAME
150   --enable-muxer=NAME      enable muxer NAME
151   --disable-muxers         disable all muxers
152   --disable-demuxer=NAME   disable demuxer NAME
153   --enable-demuxer=NAME    enable demuxer NAME
154   --disable-demuxers       disable all demuxers
155   --enable-parser=NAME     enable parser NAME
156   --disable-parser=NAME    disable parser NAME
157   --disable-parsers        disable all parsers
158   --enable-bsf=NAME        enable bitstream filter NAME
159   --disable-bsf=NAME       disable bitstream filter NAME
160   --disable-bsfs           disable all bitstream filters
161   --enable-protocol=NAME   enable protocol NAME
162   --disable-protocol=NAME  disable protocol NAME
163   --disable-protocols      disable all protocols
164   --enable-indev=NAME      enable input device NAME
165   --disable-indev=NAME     disable input device NAME
166   --disable-indevs         disable input devices
167   --enable-outdev=NAME     enable output device NAME
168   --disable-outdev=NAME    disable output device NAME
169   --disable-outdevs        disable output devices
170   --disable-devices        disable all devices
171   --enable-filter=NAME     enable filter NAME
172   --disable-filter=NAME    disable filter NAME
173   --disable-filters        disable all filters
174
175 External library support:
176
177   Using any of the following switches will allow Libav to link to the
178   corresponding external library. All the components depending on that library
179   will become enabled, if all their other dependencies are met and they are not
180   explicitly disabled. E.g. --enable-libwavpack will enable linking to
181   libwavpack and allow the libwavpack encoder to be built, unless it is
182   specifically disabled with --disable-encoder=libwavpack.
183
184   Note that only the system libraries are auto-detected. All the other external
185   libraries must be explicitly enabled.
186
187   Also note that the following help text describes the purpose of the libraries
188   themselves, not all their features will necessarily be usable by Libav.
189
190   --enable-avisynth          video frameserver
191   --enable-bzlib             bzip2 compression [autodetect]
192   --enable-frei0r            video filtering plugins
193   --enable-gnutls            crypto
194   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
195   --enable-libcdio           audio CD input
196   --enable-libdc1394         IEEE 1394/Firewire camera input
197   --enable-libdcadec         DCA audio decoding
198   --enable-libfaac           AAC audio encoding
199   --enable-libfdk-aac        AAC audio encoding/decoding
200   --enable-libfontconfig     font configuration and management
201   --enable-libfreetype       font rendering
202   --enable-libgsm            GSM audio encoding/decoding
203   --enable-libhdcd           HDCD decoding filter
204   --enable-libilbc           ILBC audio encoding/decoding
205   --enable-libkvazaar        HEVC video encoding
206   --enable-libmp3lame        MP3 audio encoding
207   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
208   --enable-libopencore-amrwb AMR-WB audio decoding
209   --enable-libopencv         computer vision
210   --enable-libopenh264       H.264 video encoding/decoding
211   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
212   --enable-libopus           Opus audio encoding/decoding
213   --enable-libpulse          Pulseaudio sound server
214   --enable-librtmp           RTMP streaming
215   --enable-libschroedinger   Dirac video encoding/decoding
216   --enable-libsnappy         snappy compression
217   --enable-libspeex          Speex audio encoding/decoding
218   --enable-libtheora         Theora video encoding/decoding
219   --enable-libtwolame        MP2 audio encoding
220   --enable-libvo-aacenc      AAC audio encoding
221   --enable-libvo-amrwbenc    AMR-WB audio encoding
222   --enable-libvorbis         Vorbis audio encoding/decoding
223   --enable-libvpx            VP* video encoding/decoding
224   --enable-libwavpack        Wavpack audio encoding/decoding
225   --enable-libwebp           WebP image encoding/decoding
226   --enable-libx264           H.264 video encoding
227   --enable-libx265           HEVC video encoding
228   --enable-libxavs           Chinese AVS video encoding
229   --enable-libxcb            X window system protocol communication
230   --enable-libxcb-shm        X11 shm communication [auto]
231   --enable-libxcb-xfixes     X11 mouse rendering [auto]
232   --enable-libxvid           MPEG-4 ASP video encoding
233   --enable-openssl           crypto
234   --enable-zlib              compression [autodetect]
235
236   The following libraries provide various hardware acceleration features:
237   --enable-cuda    Nvidia CUDA (dynamically linked)
238   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
239   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
240   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
241   --enable-libnpp  Nvidia CUDA processing
242   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
243   --enable-nvenc   Nvidia video encoding
244   --enable-omx     OpenMAX IL
245   --enable-omx-rpi OpenMAX IL for Raspberry Pi
246   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
247   --enable-vda     Apple Video Decode Acceleration [auto]
248   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
249
250 Toolchain options:
251   --arch=ARCH              select architecture [$arch]
252   --cpu=CPU                select the minimum required CPU (affects
253                            instruction selection, may crash on older CPUs)
254   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
255   --enable-cross-compile   assume a cross-compiler is used
256   --sysroot=PATH           root of cross-build tree
257   --sysinclude=PATH        location of cross-build system headers
258   --target-os=OS           compiler targets OS [$target_os]
259   --target-exec=CMD        command to run executables on target
260   --target-path=DIR        path to view of build directory on target
261   --target-samples=DIR     path to samples directory on target
262   --toolchain=NAME         set tool defaults according to NAME
263   --nm=NM                  use nm tool
264   --ar=AR                  use archive tool AR [$ar_default]
265   --as=AS                  use assembler AS [$as_default]
266   --cc=CC                  use C compiler CC [$cc_default]
267   --objcc=OCC              use ObjC compiler OCC [$cc_default]
268   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
269   --ld=LD                  use linker LD
270   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
271   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
272   --host-cc=HOSTCC         use host C compiler HOSTCC
273   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
274   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
275   --host-ld=HOSTLD         use host linker HOSTLD
276   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
277   --host-libs=HLIBS        use libs HLIBS when linking for host
278   --host-os=OS             compiler host OS [$target_os]
279   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
280   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
281   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
282   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
283   --extra-libs=ELIBS       add ELIBS [$ELIBS]
284   --extra-version=STRING   version string suffix []
285   --optflags=OPTFLAGS      override optimization-related compiler flags
286   --enable-pic             build position-independent code
287   --enable-thumb           compile for Thumb instruction set
288   --enable-lto             use link-time optimization
289   --env="ENV=override"     override the environment variables
290
291 Advanced options (experts only):
292   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
293   --custom-allocator=NAME  use a supported custom allocator
294   --disable-symver         disable symbol versioning
295   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
296   --disable-safe-bitstream-reader
297                            disable buffer boundary checking in bitreaders
298                            (faster, but may crash)
299   --enable-sram            allow use of on-chip SRAM
300
301 Optimization options (experts only):
302   --disable-asm            disable all assembly optimizations
303   --disable-altivec        disable AltiVec optimizations
304   --disable-vsx            disable VSX optimizations
305   --disable-power8         disable POWER8 optimizations
306   --disable-amd3dnow       disable 3DNow! optimizations
307   --disable-amd3dnowext    disable 3DNow! extended optimizations
308   --disable-mmx            disable MMX optimizations
309   --disable-mmxext         disable MMXEXT optimizations
310   --disable-sse            disable SSE optimizations
311   --disable-sse2           disable SSE2 optimizations
312   --disable-sse3           disable SSE3 optimizations
313   --disable-ssse3          disable SSSE3 optimizations
314   --disable-sse4           disable SSE4 optimizations
315   --disable-sse42          disable SSE4.2 optimizations
316   --disable-avx            disable AVX optimizations
317   --disable-xop            disable XOP optimizations
318   --disable-fma3           disable FMA3 optimizations
319   --disable-fma4           disable FMA4 optimizations
320   --disable-avx2           disable AVX2 optimizations
321   --disable-armv5te        disable armv5te optimizations
322   --disable-armv6          disable armv6 optimizations
323   --disable-armv6t2        disable armv6t2 optimizations
324   --disable-vfp            disable VFP optimizations
325   --disable-neon           disable NEON optimizations
326   --disable-inline-asm     disable use of inline assembly
327   --disable-yasm           disable use of nasm/yasm assembly
328
329 Developer options (useful when working on Libav itself):
330   --disable-debug          disable debugging symbols
331   --enable-debug=LEVEL     set the debug level [$debuglevel]
332   --disable-optimizations  disable compiler optimizations
333   --enable-extra-warnings  enable more compiler warnings
334   --samples=PATH           location of test samples for FATE, if not set use
335                            \$LIBAV_SAMPLES at make invocation time.
336   --enable-neon-clobber-test check NEON registers for clobbering (should be
337                            used only for debugging purposes)
338   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
339                            should be used only for debugging purposes)
340   --enable-random          randomly enable/disable components
341   --disable-random
342   --enable-random=LIST     randomly enable/disable specific components or
343   --disable-random=LIST    component groups. LIST is a comma-separated list
344                            of NAME[:PROB] entries where NAME is a component
345                            (group) and PROB the probability associated with
346                            NAME (default 0.5).
347   --random-seed=VALUE      seed value for --enable/disable-random
348   --disable-valgrind-backtrace do not print a backtrace under Valgrind
349                            (only applies to --disable-optimizations builds)
350
351 NOTE: Object files are built at the place where configure is launched.
352 EOF
353   exit 0
354 }
355
356 quotes='""'
357
358 log(){
359     echo "$@" >> $logfile
360 }
361
362 log_file(){
363     log BEGIN $1
364     i=1
365     while read line; do
366         printf '%5s   %s\n' "${i}" "${line}"
367         i=$(($i+1))
368     done < $1 >> $logfile
369     log END $1
370 }
371
372 echolog(){
373     log "$@"
374     echo "$@"
375 }
376
377 warn(){
378     log "WARNING: $*"
379     WARNINGS="${WARNINGS}WARNING: $*\n"
380 }
381
382 die(){
383     echolog "$@"
384     cat <<EOF
385
386 If you think configure made a mistake, make sure you are using the latest
387 version from Git.  If the latest version fails, report the problem to the
388 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
389 EOF
390     if disabled logging; then
391         cat <<EOF
392 Rerun configure with logging enabled (do not use --disable-logging), and
393 include the log this produces with your report.
394 EOF
395     else
396         cat <<EOF
397 Include the log file "$logfile" produced by configure as this will help
398 solving the problem.
399 EOF
400     fi
401     exit 1
402 }
403
404 # Avoid locale weirdness, besides we really just want to translate ASCII.
405 toupper(){
406     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
407 }
408
409 tolower(){
410     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
411 }
412
413 c_escape(){
414     echo "$*" | sed 's/["\\]/\\\0/g'
415 }
416
417 sh_quote(){
418     v=$(echo "$1" | sed "s/'/'\\\\''/g")
419     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
420     echo "$v"
421 }
422
423 cleanws(){
424     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
425 }
426
427 filter(){
428     pat=$1
429     shift
430     for v; do
431         eval "case $v in $pat) printf '%s ' $v ;; esac"
432     done
433 }
434
435 filter_out(){
436     pat=$1
437     shift
438     for v; do
439         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
440     done
441 }
442
443 map(){
444     m=$1
445     shift
446     for v; do eval $m; done
447 }
448
449 add_suffix(){
450     suffix=$1
451     shift
452     for v; do echo ${v}${suffix}; done
453 }
454
455 set_all(){
456     value=$1
457     shift
458     for var in $*; do
459         eval $var=$value
460     done
461 }
462
463 set_weak(){
464     value=$1
465     shift
466     for var; do
467         eval : \${$var:=$value}
468     done
469 }
470
471 sanitize_var_name(){
472     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
473 }
474
475 set_safe(){
476     var=$1
477     shift
478     eval $(sanitize_var_name "$var")='$*'
479 }
480
481 get_safe(){
482     eval echo \$$(sanitize_var_name "$1")
483 }
484
485 pushvar(){
486     for pvar in $*; do
487         eval level=\${${pvar}_level:=0}
488         eval ${pvar}_${level}="\$$pvar"
489         eval ${pvar}_level=$(($level+1))
490     done
491 }
492
493 popvar(){
494     for pvar in $*; do
495         eval level=\${${pvar}_level:-0}
496         test $level = 0 && continue
497         eval level=$(($level-1))
498         eval $pvar="\${${pvar}_${level}}"
499         eval ${pvar}_level=$level
500         eval unset ${pvar}_${level}
501     done
502 }
503
504 enable(){
505     set_all yes $*
506 }
507
508 disable(){
509     set_all no $*
510 }
511
512 enable_weak(){
513     set_weak yes $*
514 }
515
516 disable_weak(){
517     set_weak no $*
518 }
519
520 enable_safe(){
521     for var; do
522         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
523     done
524 }
525
526 disable_safe(){
527     for var; do
528         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
529     done
530 }
531
532 do_enable_deep(){
533     for var; do
534         enabled $var && continue
535         eval sel="\$${var}_select"
536         eval sgs="\$${var}_suggest"
537         pushvar var sgs
538         enable_deep $sel
539         popvar sgs
540         enable_deep_weak $sgs
541         popvar var
542     done
543 }
544
545 enable_deep(){
546     do_enable_deep $*
547     enable $*
548 }
549
550 enable_deep_weak(){
551     for var; do
552         disabled $var && continue
553         pushvar var
554         do_enable_deep $var
555         popvar var
556         enable_weak $var
557     done
558 }
559
560 enabled(){
561     test "${1#!}" = "$1" && op== || op=!=
562     eval test "x\$${1#!}" $op "xyes"
563 }
564
565 disabled(){
566     test "${1#!}" = "$1" && op== || op=!=
567     eval test "x\$${1#!}" $op "xno"
568 }
569
570 enabled_all(){
571     for opt; do
572         enabled $opt || return 1
573     done
574 }
575
576 disabled_all(){
577     for opt; do
578         disabled $opt || return 1
579     done
580 }
581
582 enabled_any(){
583     for opt; do
584         enabled $opt && return 0
585     done
586 }
587
588 disabled_any(){
589     for opt; do
590         disabled $opt && return 0
591     done
592     return 1
593 }
594
595 set_default(){
596     for opt; do
597         eval : \${$opt:=\$${opt}_default}
598     done
599 }
600
601 is_in(){
602     value=$1
603     shift
604     for var in $*; do
605         [ $var = $value ] && return 0
606     done
607     return 1
608 }
609
610 do_check_deps(){
611     for cfg; do
612         cfg="${cfg#!}"
613         enabled ${cfg}_checking && die "Circular dependency for $cfg."
614         disabled ${cfg}_checking && continue
615         enable ${cfg}_checking
616         append allopts $cfg
617
618         eval dep_all="\$${cfg}_deps"
619         eval dep_any="\$${cfg}_deps_any"
620         eval dep_sel="\$${cfg}_select"
621         eval dep_sgs="\$${cfg}_suggest"
622         eval dep_ifa="\$${cfg}_if"
623         eval dep_ifn="\$${cfg}_if_any"
624
625         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
626         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
627         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
628
629         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
630         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
631         enabled_all  $dep_all || disable $cfg
632         enabled_any  $dep_any || disable $cfg
633         disabled_any $dep_sel && disable $cfg
634
635         if enabled $cfg; then
636             enable_deep $dep_sel
637             enable_deep_weak $dep_sgs
638         fi
639
640         disable ${cfg}_checking
641     done
642 }
643
644 check_deps(){
645     unset allopts
646
647     do_check_deps "$@"
648
649     for cfg in $allopts; do
650         enabled $cfg || continue
651         eval dep_extralibs="\$${cfg}_extralibs"
652         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
653     done
654 }
655
656 print_config(){
657     pfx=$1
658     files=$2
659     shift 2
660     map 'eval echo "$v \${$v:-no}"' "$@" |
661     awk "BEGIN { split(\"$files\", files) }
662         {
663             c = \"$pfx\" toupper(\$1);
664             v = \$2;
665             sub(/yes/, 1, v);
666             sub(/no/,  0, v);
667             for (f in files) {
668                 file = files[f];
669                 if (file ~ /\\.h\$/) {
670                     printf(\"#define %s %d\\n\", c, v) >>file;
671                 } else if (file ~ /\\.asm\$/) {
672                     printf(\"%%define %s %d\\n\", c, v) >>file;
673                 } else if (file ~ /\\.mak\$/) {
674                     n = -v ? \"\" : \"!\";
675                     printf(\"%s%s=yes\\n\", n, c) >>file;
676                 }
677             }
678         }"
679 }
680
681 print_enabled(){
682     suf=$1
683     shift
684     for v; do
685         enabled $v && printf "%s\n" ${v%$suf}
686     done
687 }
688
689 append(){
690     var=$1
691     shift
692     eval "$var=\"\$$var $*\""
693 }
694
695 prepend(){
696     var=$1
697     shift
698     eval "$var=\"$* \$$var\""
699 }
700
701 unique(){
702     var=$1
703     uniq_list=""
704     for tok in $(eval echo \$$var); do
705         uniq_list="$(filter_out $tok $uniq_list) $tok"
706     done
707     eval "$var=\"${uniq_list}\""
708 }
709
710 add_cppflags(){
711     append CPPFLAGS "$@"
712 }
713
714 add_cflags(){
715     append CFLAGS $($cflags_filter "$@")
716 }
717
718 add_asflags(){
719     append ASFLAGS $($asflags_filter "$@")
720 }
721
722 add_objcflags(){
723     append OBJCFLAGS $($objcflags_filter "$@")
724 }
725
726 add_ldflags(){
727     append LDFLAGS $($ldflags_filter "$@")
728 }
729
730 add_ldexeflags(){
731     append LDEXEFLAGS $($ldflags_filter "$@")
732 }
733
734 add_stripflags(){
735     append STRIPFLAGS "$@"
736 }
737
738 add_extralibs(){
739     prepend extralibs $($ldflags_filter "$@")
740 }
741
742 add_host_cppflags(){
743     append host_cppflags "$@"
744 }
745
746 add_host_cflags(){
747     append host_cflags $($host_cflags_filter "$@")
748 }
749
750 add_host_ldflags(){
751     append host_ldflags $($host_ldflags_filter "$@")
752 }
753
754 add_compat(){
755     append compat_objs $1
756     shift
757     map 'add_cppflags -D$v' "$@"
758 }
759
760 check_cmd(){
761     log "$@"
762     "$@" >> $logfile 2>&1
763 }
764
765 cc_o(){
766     eval printf '%s\\n' $CC_O
767 }
768
769 cc_e(){
770     eval printf '%s\\n' $CC_E
771 }
772
773 check_cc(){
774     log check_cc "$@"
775     cat > $TMPC
776     log_file $TMPC
777     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
778 }
779
780 check_objcc(){
781     log check_objcc "$@"
782     cat > $TMPC
783     log_file $TMPC
784     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
785 }
786
787 check_cpp(){
788     log check_cpp "$@"
789     cat > $TMPC
790     log_file $TMPC
791     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
792 }
793
794 as_o(){
795     eval printf '%s\\n' $AS_O
796 }
797
798 check_as(){
799     log check_as "$@"
800     cat > $TMPS
801     log_file $TMPS
802     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
803 }
804
805 check_inline_asm(){
806     log check_inline_asm "$@"
807     name="$1"
808     code="$2"
809     shift 2
810     disable $name
811     check_cc "$@" <<EOF && enable $name
812 void foo(void){ __asm__ volatile($code); }
813 EOF
814 }
815
816 check_insn(){
817     log check_insn "$@"
818     check_inline_asm ${1}_inline "\"$2\""
819     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
820 }
821
822 check_yasm(){
823     log check_yasm "$@"
824     echo "$1" > $TMPS
825     log_file $TMPS
826     shift 1
827     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
828 }
829
830 ld_o(){
831     eval printf '%s\\n' $LD_O
832 }
833
834 check_ld(){
835     log check_ld "$@"
836     flags=$(filter_out '-l*' "$@")
837     libs=$(filter '-l*' "$@")
838     check_cc $($cflags_filter $flags) || return
839     flags=$($ldflags_filter $flags)
840     libs=$($ldflags_filter $libs)
841     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
842 }
843
844 print_include(){
845     hdr=$1
846     test "${hdr%.h}" = "${hdr}" &&
847         echo "#include $hdr"    ||
848         echo "#include <$hdr>"
849 }
850
851 check_code(){
852     log check_code "$@"
853     check=$1
854     headers=$2
855     code=$3
856     shift 3
857     {
858         for hdr in $headers; do
859             print_include $hdr
860         done
861         echo "int main(void) { $code; return 0; }"
862     } | check_$check "$@"
863 }
864
865 check_cppflags(){
866     log check_cppflags "$@"
867     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
868 int x;
869 EOF
870 }
871
872 test_cflags(){
873     log test_cflags "$@"
874     set -- $($cflags_filter "$@")
875     check_cc "$@" <<EOF
876 int x;
877 EOF
878 }
879
880 check_cflags(){
881     log check_cflags "$@"
882     test_cflags "$@" && add_cflags "$@"
883 }
884
885 test_objcflags(){
886     log test_objcflags "$@"
887     set -- $($objcflags_filter "$@")
888     check_objcc "$@" <<EOF
889 int x;
890 EOF
891 }
892
893 check_objcflags(){
894     log check_objcflags "$@"
895     test_objcflags "$@" && add_objcflags "$@"
896 }
897
898 test_ldflags(){
899     log test_ldflags "$@"
900     check_ld "$@" <<EOF
901 int main(void){ return 0; }
902 EOF
903 }
904
905 check_ldflags(){
906     log check_ldflags "$@"
907     test_ldflags "$@" && add_ldflags "$@"
908 }
909
910 test_stripflags(){
911     log test_stripflags "$@"
912     # call check_cc to get a fresh TMPO
913     check_cc <<EOF
914 int main(void) { return 0; }
915 EOF
916     check_cmd $strip $STRIPFLAGS "$@" $TMPO
917 }
918
919 check_stripflags(){
920     log check_stripflags "$@"
921     test_stripflags "$@" && add_stripflags "$@"
922 }
923
924 check_header(){
925     log check_header "$@"
926     header=$1
927     shift
928     disable_safe $header
929     check_cpp "$@" <<EOF && enable_safe $header
930 #include <$header>
931 int x;
932 EOF
933 }
934
935 check_func(){
936     log check_func "$@"
937     func=$1
938     shift
939     disable $func
940     check_ld "$@" <<EOF && enable $func
941 extern int $func();
942 int main(void){ $func(); }
943 EOF
944 }
945
946 check_mathfunc(){
947     log check_mathfunc "$@"
948     func=$1
949     narg=$2
950     shift 2
951     test $narg = 2 && args="f, g" || args="f"
952     disable $func
953     check_ld "$@" <<EOF && enable $func
954 #include <math.h>
955 float foo(float f, float g) { return $func($args); }
956 int main(void){ return 0; }
957 EOF
958 }
959
960 check_func_headers(){
961     log check_func_headers "$@"
962     headers=$1
963     funcs=$2
964     shift 2
965     {
966         for hdr in $headers; do
967             print_include $hdr
968         done
969         for func in $funcs; do
970             echo "long check_$func(void) { return (long) $func; }"
971         done
972         echo "int main(void) { return 0; }"
973     } | check_ld "$@" && enable $funcs && enable_safe $headers
974 }
975
976 check_cpp_condition(){
977     log check_cpp_condition "$@"
978     header=$1
979     condition=$2
980     shift 2
981     check_cpp "$@" <<EOF
982 #include <$header>
983 #if !($condition)
984 #error "unsatisfied condition: $condition"
985 #endif
986 EOF
987 }
988
989 test_cflags_cpp(){
990     log test_cflags_cpp "$@"
991     flags=$1
992     condition=$2
993     shift 2
994     set -- $($cflags_filter "$flags")
995     check_cpp "$@" <<EOF
996 #if !($condition)
997 #error "unsatisfied condition: $condition"
998 #endif
999 EOF
1000 }
1001
1002 check_lib(){
1003     log check_lib "$@"
1004     headers="$1"
1005     funcs="$2"
1006     shift 2
1007     check_func_headers "$headers" "$funcs" "$@" && add_extralibs "$@"
1008 }
1009
1010 check_pkg_config(){
1011     log check_pkg_config "$@"
1012     pkg_version="$1"
1013     pkg="${1%% *}"
1014     headers="$2"
1015     funcs="$3"
1016     shift 3
1017     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1018     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1019     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1020     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1021         set_safe "${pkg}_cflags" $pkg_cflags   &&
1022         set_safe "${pkg}_libs"   $pkg_libs
1023 }
1024
1025 check_exec(){
1026     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1027 }
1028
1029 check_exec_crash(){
1030     log check_exec_crash "$@"
1031     code=$(cat)
1032
1033     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1034     # are safe but may not be available everywhere.  Thus we use
1035     # raise(SIGTERM) instead.  The check is run in a subshell so we
1036     # can redirect the "Terminated" message from the shell.  SIGBUS
1037     # is not defined by standard C so it is used conditionally.
1038
1039     (check_exec "$@") >> $logfile 2>&1 <<EOF
1040 #include <signal.h>
1041 static void sighandler(int sig){
1042     raise(SIGTERM);
1043 }
1044 int foo(void){
1045     $code
1046 }
1047 int (*func_ptr)(void) = foo;
1048 int main(void){
1049     signal(SIGILL, sighandler);
1050     signal(SIGFPE, sighandler);
1051     signal(SIGSEGV, sighandler);
1052 #ifdef SIGBUS
1053     signal(SIGBUS, sighandler);
1054 #endif
1055     return func_ptr();
1056 }
1057 EOF
1058 }
1059
1060 check_type(){
1061     log check_type "$@"
1062     headers=$1
1063     type=$2
1064     shift 2
1065     disable_safe "$type"
1066     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1067 }
1068
1069 check_struct(){
1070     log check_struct "$@"
1071     headers=$1
1072     struct=$2
1073     member=$3
1074     shift 3
1075     disable_safe "${struct}_${member}"
1076     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1077         enable_safe "${struct}_${member}"
1078 }
1079
1080 check_builtin(){
1081     log check_builtin "$@"
1082     name=$1
1083     headers=$2
1084     builtin=$3
1085     shift 3
1086     disable "$name"
1087     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1088 }
1089
1090 check_compile_assert(){
1091     log check_compile_assert "$@"
1092     name=$1
1093     headers=$2
1094     condition=$3
1095     shift 3
1096     disable "$name"
1097     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1098 }
1099
1100 require(){
1101     log require "$@"
1102     name_version="$1"
1103     headers="$2"
1104     func="$3"
1105     shift 3
1106     check_lib "$headers" $func "$@" || die "ERROR: $name_version not found"
1107 }
1108
1109 require_pkg_config(){
1110     log require_pkg_config "$@"
1111     pkg_version="$1"
1112     pkg="${1%% *}"
1113     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1114     add_cflags    $(get_safe "${pkg}_cflags")
1115     add_extralibs $(get_safe "${pkg}_libs")
1116 }
1117
1118 hostcc_e(){
1119     eval printf '%s\\n' $HOSTCC_E
1120 }
1121
1122 hostcc_o(){
1123     eval printf '%s\\n' $HOSTCC_O
1124 }
1125
1126 check_host_cc(){
1127     log check_host_cc "$@"
1128     cat > $TMPC
1129     log_file $TMPC
1130     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1131 }
1132
1133 check_host_cpp(){
1134     log check_host_cpp "$@"
1135     cat > $TMPC
1136     log_file $TMPC
1137     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1138 }
1139
1140 check_host_cppflags(){
1141     log check_host_cppflags "$@"
1142     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1143 int x;
1144 EOF
1145 }
1146
1147 check_host_cflags(){
1148     log check_host_cflags "$@"
1149     set -- $($host_cflags_filter "$@")
1150     check_host_cc "$@" <<EOF && append host_cflags "$@"
1151 int x;
1152 EOF
1153 }
1154
1155 check_host_cpp_condition(){
1156     log check_host_cpp_condition "$@"
1157     header=$1
1158     condition=$2
1159     shift 2
1160     check_host_cpp "$@" <<EOF
1161 #include <$header>
1162 #if !($condition)
1163 #error "unsatisfied condition: $condition"
1164 #endif
1165 EOF
1166 }
1167
1168 apply(){
1169     file=$1
1170     shift
1171     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1172 }
1173
1174 cp_if_changed(){
1175     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1176     mkdir -p "$(dirname $2)"
1177     cp -f "$1" "$2"
1178 }
1179
1180 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1181 # system-dependent things.
1182
1183 AVCODEC_COMPONENTS="
1184     bsfs
1185     decoders
1186     encoders
1187     hwaccels
1188     parsers
1189 "
1190
1191 AVDEVICE_COMPONENTS="
1192     indevs
1193     outdevs
1194 "
1195 AVFILTER_COMPONENTS="
1196     filters
1197 "
1198 AVFORMAT_COMPONENTS="
1199     demuxers
1200     muxers
1201     protocols
1202 "
1203
1204 AVRESAMPLE_COMPONENTS=""
1205 AVUTIL_COMPONENTS=""
1206
1207 COMPONENT_LIST="
1208     $AVCODEC_COMPONENTS
1209     $AVDEVICE_COMPONENTS
1210     $AVFILTER_COMPONENTS
1211     $AVFORMAT_COMPONENTS
1212     $AVRESAMPLE_COMPONENTS
1213     $AVUTIL_COMPONENTS
1214 "
1215
1216 EXAMPLE_LIST="
1217     decode_audio_example
1218     decode_video_example
1219     encode_audio_example
1220     encode_video_example
1221     filter_audio_example
1222     metadata_example
1223     output_example
1224     qsvdec_example
1225     transcode_aac_example
1226 "
1227
1228 HWACCEL_LIBRARY_NONFREE_LIST="
1229     cuda
1230     libnpp
1231 "
1232 HWACCEL_LIBRARY_LIST="
1233     $HWACCEL_LIBRARY_NONFREE_LIST
1234     d3d11va
1235     dxva2
1236     libmfx
1237     mmal
1238     nvenc
1239     omx
1240     vaapi
1241     vda
1242     vdpau
1243 "
1244
1245 EXTERNAL_LIBRARY_GPL_LIST="
1246     libcdio
1247     libx264
1248     libx265
1249     libxavs
1250     libxvid
1251 "
1252
1253 EXTERNAL_LIBRARY_NONFREE_LIST="
1254     libfaac
1255     libfdk_aac
1256     openssl
1257 "
1258
1259 EXTERNAL_LIBRARY_VERSION3_LIST="
1260     libopencore_amrnb
1261     libopencore_amrwb
1262     libvo_aacenc
1263     libvo_amrwbenc
1264 "
1265
1266 EXTERNAL_LIBRARY_LIST="
1267     $EXTERNAL_LIBRARY_GPL_LIST
1268     $EXTERNAL_LIBRARY_NONFREE_LIST
1269     $EXTERNAL_LIBRARY_VERSION3_LIST
1270     avisynth
1271     bzlib
1272     frei0r
1273     gnutls
1274     libbs2b
1275     libdc1394
1276     libdcadec
1277     libfontconfig
1278     libfreetype
1279     libgsm
1280     libhdcd
1281     libilbc
1282     libkvazaar
1283     libmp3lame
1284     libopencv
1285     libopenh264
1286     libopenjpeg
1287     libopus
1288     libpulse
1289     librtmp
1290     libschroedinger
1291     libsnappy
1292     libspeex
1293     libtheora
1294     libtwolame
1295     libvorbis
1296     libvpx
1297     libwavpack
1298     libwebp
1299     libxcb
1300     libxcb_shm
1301     libxcb_xfixes
1302     zlib
1303 "
1304
1305 FEATURE_LIST="
1306     gray
1307     hardcoded_tables
1308     omx_rpi
1309     runtime_cpudetect
1310     safe_bitstream_reader
1311     shared
1312     small
1313     sram
1314     static
1315     swscale_alpha
1316 "
1317
1318 LIBRARY_LIST="
1319     avcodec
1320     avdevice
1321     avfilter
1322     avformat
1323     avresample
1324     avutil
1325     swscale
1326 "
1327
1328 LICENSE_LIST="
1329     gpl
1330     nonfree
1331     version3
1332 "
1333
1334 PROGRAM_LIST="
1335     avconv
1336     avplay
1337     avprobe
1338 "
1339
1340 SUBSYSTEM_LIST="
1341     dct
1342     doc
1343     error_resilience
1344     faan
1345     fft
1346     lsp
1347     lzo
1348     mdct
1349     network
1350     rdft
1351 "
1352
1353 CONFIG_LIST="
1354     $COMPONENT_LIST
1355     $EXAMPLE_LIST
1356     $EXTERNAL_LIBRARY_LIST
1357     $HWACCEL_LIBRARY_LIST
1358     $FEATURE_LIST
1359     $LICENSE_LIST
1360     $LIBRARY_LIST
1361     $PROGRAM_LIST
1362     $SUBSYSTEM_LIST
1363     neon_clobber_test
1364     pic
1365     pod2man
1366     texi2html
1367     thumb
1368     valgrind_backtrace
1369     xmm_clobber_test
1370 "
1371
1372 THREADS_LIST="
1373     pthreads
1374     w32threads
1375 "
1376
1377 ATOMICS_LIST="
1378     atomics_gcc
1379     atomics_suncc
1380     atomics_win32
1381 "
1382
1383 ARCH_LIST="
1384     aarch64
1385     alpha
1386     arm
1387     avr32
1388     avr32_ap
1389     avr32_uc
1390     bfin
1391     ia64
1392     m68k
1393     mips
1394     mips64
1395     parisc
1396     ppc
1397     ppc64
1398     s390
1399     sh4
1400     sparc
1401     sparc64
1402     tilegx
1403     tilepro
1404     tomi
1405     x86
1406     x86_32
1407     x86_64
1408 "
1409
1410 ARCH_EXT_LIST_ARM="
1411     armv5te
1412     armv6
1413     armv6t2
1414     armv8
1415     neon
1416     vfp
1417     vfpv3
1418 "
1419
1420 ARCH_EXT_LIST_X86_SIMD="
1421     amd3dnow
1422     amd3dnowext
1423     avx
1424     avx2
1425     fma3
1426     fma4
1427     mmx
1428     mmxext
1429     sse
1430     sse2
1431     sse3
1432     sse4
1433     sse42
1434     ssse3
1435     xop
1436 "
1437
1438 ARCH_EXT_LIST_PPC="
1439     altivec
1440     dcbzl
1441     ldbrx
1442     power8
1443     ppc4xx
1444     vsx
1445 "
1446
1447 ARCH_EXT_LIST_X86="
1448     $ARCH_EXT_LIST_X86_SIMD
1449     cpunop
1450     i686
1451 "
1452
1453 ARCH_EXT_LIST_MIPS="
1454     loongson
1455     mips32r1
1456     mips64r1
1457     mips32r2
1458     mips64r2
1459     mips32r6
1460     mips64r6
1461 "
1462
1463 ARCH_EXT_LIST="
1464     $ARCH_EXT_LIST_ARM
1465     $ARCH_EXT_LIST_MIPS
1466     $ARCH_EXT_LIST_PPC
1467     $ARCH_EXT_LIST_X86
1468     vis
1469 "
1470
1471 ARCH_FEATURES="
1472     aligned_stack
1473     fast_64bit
1474     fast_clz
1475     fast_cmov
1476     local_aligned_8
1477     local_aligned_16
1478     local_aligned_32
1479     simd_align_16
1480     simd_align_32
1481 "
1482
1483 BUILTIN_LIST="
1484     atomic_cas_ptr
1485     machine_rw_barrier
1486     MemoryBarrier
1487     mm_empty
1488     rdtsc
1489     sem_timedwait
1490     sync_val_compare_and_swap
1491 "
1492 HAVE_LIST_CMDLINE="
1493     inline_asm
1494     symver
1495     yasm
1496 "
1497
1498 HAVE_LIST_PUB="
1499     bigendian
1500     fast_unaligned
1501 "
1502
1503 HEADERS_LIST="
1504     AVFoundation_AVFoundation_h
1505     alsa_asoundlib_h
1506     altivec_h
1507     arpa_inet_h
1508     cdio_paranoia_h
1509     cdio_paranoia_paranoia_h
1510     dispatch_dispatch_h
1511     dev_bktr_ioctl_bt848_h
1512     dev_bktr_ioctl_meteor_h
1513     dev_ic_bt8xx_h
1514     dev_video_bktr_ioctl_bt848_h
1515     dev_video_meteor_ioctl_meteor_h
1516     direct_h
1517     dlfcn_h
1518     d3d11_h
1519     dxva_h
1520     gsm_h
1521     io_h
1522     mach_mach_time_h
1523     machine_ioctl_bt848_h
1524     machine_ioctl_meteor_h
1525     malloc_h
1526     poll_h
1527     sndio_h
1528     soundcard_h
1529     stdatomic_h
1530     sys_mman_h
1531     sys_param_h
1532     sys_resource_h
1533     sys_select_h
1534     sys_soundcard_h
1535     sys_time_h
1536     sys_un_h
1537     sys_videoio_h
1538     unistd_h
1539     valgrind_valgrind_h
1540     windows_h
1541     winsock2_h
1542 "
1543
1544 INTRINSICS_LIST="
1545     intrinsics_neon
1546 "
1547
1548 MATH_FUNCS="
1549     atanf
1550     atan2f
1551     cbrtf
1552     cosf
1553     exp2
1554     exp2f
1555     expf
1556     isinf
1557     isnan
1558     ldexpf
1559     llrint
1560     llrintf
1561     log2
1562     log2f
1563     log10f
1564     lrint
1565     lrintf
1566     powf
1567     rint
1568     round
1569     roundf
1570     sinf
1571     trunc
1572     truncf
1573 "
1574
1575 SYSTEM_FUNCS="
1576     aligned_malloc
1577     clock_gettime
1578     closesocket
1579     CommandLineToArgvW
1580     CoTaskMemFree
1581     CryptGenRandom
1582     dlopen
1583     fcntl
1584     flt_lim
1585     fork
1586     getaddrinfo
1587     gethrtime
1588     getopt
1589     GetProcessAffinityMask
1590     GetProcessMemoryInfo
1591     GetProcessTimes
1592     getrusage
1593     GetSystemTimeAsFileTime
1594     gettimeofday
1595     gmtime_r
1596     inet_aton
1597     isatty
1598     jack_port_get_latency_range
1599     LoadLibrary
1600     localtime_r
1601     mach_absolute_time
1602     MapViewOfFile
1603     memalign
1604     mkstemp
1605     mmap
1606     mprotect
1607     nanosleep
1608     posix_memalign
1609     sched_getaffinity
1610     SetConsoleTextAttribute
1611     setmode
1612     setrlimit
1613     Sleep
1614     strerror_r
1615     sysconf
1616     sysctl
1617     usleep
1618     VirtualAlloc
1619 "
1620
1621 TOOLCHAIN_FEATURES="
1622     as_dn_directive
1623     as_fpu_directive
1624     as_func
1625     as_object_arch
1626     asm_mod_q
1627     attribute_may_alias
1628     attribute_packed
1629     ebp_available
1630     ebx_available
1631     gnu_as
1632     ibm_asm
1633     inline_asm_labels
1634     pragma_deprecated
1635     symver_asm_label
1636     symver_gnu_asm
1637     vfp_args
1638     xform_asm
1639     xmm_clobbers
1640 "
1641
1642 TYPES_LIST="
1643     CONDITION_VARIABLE_Ptr
1644     socklen_t
1645     struct_addrinfo
1646     struct_group_source_req
1647     struct_ip_mreq_source
1648     struct_ipv6_mreq
1649     struct_pollfd
1650     struct_rusage_ru_maxrss
1651     struct_sockaddr_in6
1652     struct_sockaddr_sa_len
1653     struct_sockaddr_storage
1654     struct_v4l2_frmivalenum_discrete
1655 "
1656
1657 HAVE_LIST="
1658     $ARCH_EXT_LIST
1659     $(add_suffix _external $ARCH_EXT_LIST)
1660     $(add_suffix _inline   $ARCH_EXT_LIST)
1661     $ARCH_FEATURES
1662     $BUILTIN_LIST
1663     $HAVE_LIST_CMDLINE
1664     $HAVE_LIST_PUB
1665     $HEADERS_LIST
1666     $INTRINSICS_LIST
1667     $MATH_FUNCS
1668     $SYSTEM_FUNCS
1669     $THREADS_LIST
1670     $TOOLCHAIN_FEATURES
1671     $TYPES_LIST
1672     dos_paths
1673     dxva2_lib
1674     libc_msvcrt
1675     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1676     sdl
1677     section_data_rel_ro
1678     threads
1679     vaapi_drm
1680     vaapi_x11
1681     vdpau_x11
1682 "
1683
1684 # options emitted with CONFIG_ prefix but not available on the command line
1685 CONFIG_EXTRA="
1686     aandcttables
1687     ac3dsp
1688     audio_frame_queue
1689     audiodsp
1690     blockdsp
1691     bswapdsp
1692     cabac
1693     dirac_parse
1694     dvprofile
1695     faandct
1696     faanidct
1697     fdctdsp
1698     flacdsp
1699     fmtconvert
1700     g722dsp
1701     gmp
1702     golomb
1703     gplv3
1704     h263dsp
1705     h264chroma
1706     h264dsp
1707     h264parse
1708     h264pred
1709     h264qpel
1710     hpeldsp
1711     huffman
1712     huffyuvdsp
1713     huffyuvencdsp
1714     idctdsp
1715     iirfilter
1716     imdct15
1717     intrax8
1718     iso_media
1719     ividsp
1720     jpegtables
1721     libx262
1722     lgplv3
1723     lpc
1724     lzf
1725     me_cmp
1726     mpeg_er
1727     mpegaudio
1728     mpegaudiodsp
1729     mpegaudioheader
1730     mpegvideo
1731     mpegvideoenc
1732     mss34dsp
1733     pixblockdsp
1734     qpeldsp
1735     qsv
1736     qsvdec
1737     qsvenc
1738     rangecoder
1739     riffdec
1740     riffenc
1741     rtpdec
1742     rtpenc_chain
1743     rv34dsp
1744     sinewin
1745     snappy
1746     srtp
1747     startcode
1748     texturedsp
1749     texturedspenc
1750     tpeldsp
1751     vaapi_encode
1752     vc1dsp
1753     videodsp
1754     vp3dsp
1755     vp56dsp
1756     vp8dsp
1757     wma_freqs
1758     wmv2dsp
1759 "
1760
1761 CMDLINE_SELECT="
1762     $ARCH_EXT_LIST
1763     $CONFIG_LIST
1764     $HAVE_LIST_CMDLINE
1765     $THREADS_LIST
1766     asm
1767     cross_compile
1768     debug
1769     extra_warnings
1770     logging
1771     lto
1772     optimizations
1773     rpath
1774 "
1775
1776 PATHS_LIST="
1777     bindir
1778     datadir
1779     docdir
1780     incdir
1781     libdir
1782     mandir
1783     prefix
1784     shlibdir
1785 "
1786
1787 CMDLINE_SET="
1788     $PATHS_LIST
1789     ar
1790     arch
1791     as
1792     cc
1793     objcc
1794     cpu
1795     cross_prefix
1796     custom_allocator
1797     dep_cc
1798     env
1799     extra_version
1800     host_cc
1801     host_cflags
1802     host_ld
1803     host_ldflags
1804     host_libs
1805     host_os
1806     ld
1807     logfile
1808     malloc_prefix
1809     nm
1810     optflags
1811     pkg_config
1812     pkg_config_flags
1813     random_seed
1814     samples
1815     sysinclude
1816     sysroot
1817     target_exec
1818     target_os
1819     target_path
1820     target_samples
1821     toolchain
1822 "
1823
1824 CMDLINE_APPEND="
1825     extra_cflags
1826     extra_objcflags
1827     host_cppflags
1828 "
1829
1830 # code dependency declarations
1831
1832 # architecture extensions
1833
1834 armv5te_deps="arm"
1835 armv6_deps="arm"
1836 armv6t2_deps="arm"
1837 armv8_deps="aarch64"
1838 neon_deps_any="aarch64 arm"
1839 intrinsics_neon_deps="neon"
1840 vfp_deps_any="aarch64 arm"
1841 vfpv3_deps="vfp"
1842
1843 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1844
1845 altivec_deps="ppc"
1846 ppc4xx_deps="ppc"
1847 vsx_deps="altivec"
1848 power8_deps="vsx"
1849
1850 cpunop_deps="i686"
1851 x86_64_select="i686"
1852 x86_64_suggest="fast_cmov"
1853
1854 amd3dnow_deps="mmx"
1855 amd3dnowext_deps="amd3dnow"
1856 i686_deps="x86"
1857 mmx_deps="x86"
1858 mmxext_deps="mmx"
1859 sse_deps="mmxext"
1860 sse2_deps="sse"
1861 sse3_deps="sse2"
1862 ssse3_deps="sse3"
1863 sse4_deps="ssse3"
1864 sse42_deps="sse4"
1865 avx_deps="sse42"
1866 xop_deps="avx"
1867 fma3_deps="avx"
1868 fma4_deps="avx"
1869 avx2_deps="avx"
1870
1871 mmx_external_deps="yasm"
1872 mmx_inline_deps="inline_asm"
1873 mmx_suggest="mmx_external mmx_inline"
1874
1875 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1876     eval dep=\$${ext}_deps
1877     eval ${ext}_external_deps='"${dep}_external"'
1878     eval ${ext}_inline_deps='"${dep}_inline"'
1879     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1880 done
1881
1882 aligned_stack_if_any="aarch64 ppc x86"
1883 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1884 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1885 fast_unaligned_if_any="aarch64 ppc x86"
1886 simd_align_16_if_any="altivec neon sse"
1887 simd_align_32_if_any="avx"
1888
1889 # system capabilities
1890 symver_if_any="symver_asm_label symver_gnu_asm"
1891 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1892
1893 # threading support
1894 atomics_gcc_if="sync_val_compare_and_swap"
1895 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1896 atomics_win32_if="MemoryBarrier"
1897 atomics_native_if_any="$ATOMICS_LIST"
1898 w32threads_deps="atomics_native"
1899 threads_if_any="$THREADS_LIST"
1900
1901 # subsystems
1902 dct_select="rdft"
1903 dirac_parse_select="golomb"
1904 error_resilience_select="me_cmp"
1905 faandct_deps="faan fdctdsp"
1906 faanidct_deps="faan idctdsp"
1907 h264dsp_select="startcode"
1908 intrax8_select="blockdsp idctdsp"
1909 mdct_select="fft"
1910 rdft_select="fft"
1911 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1912 mpeg_er_select="error_resilience"
1913 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1914 mpegaudiodsp_select="dct"
1915 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1916 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1917 vc1dsp_select="h264chroma qpeldsp startcode"
1918
1919 # decoders / encoders
1920 aac_decoder_select="imdct15 mdct sinewin"
1921 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1922 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1923 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1924 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1925 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1926 adpcm_g722_decoder_select="g722dsp"
1927 adpcm_g722_encoder_select="g722dsp"
1928 aic_decoder_select="golomb idctdsp"
1929 alac_encoder_select="lpc"
1930 als_decoder_select="bswapdsp"
1931 amrnb_decoder_select="lsp"
1932 amrwb_decoder_select="lsp"
1933 amv_decoder_select="sp5x_decoder"
1934 ape_decoder_select="bswapdsp"
1935 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1936 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1937 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1938 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1939 atrac1_decoder_select="mdct sinewin"
1940 atrac3_decoder_select="mdct"
1941 atrac3p_decoder_select="mdct sinewin"
1942 bink_decoder_select="blockdsp hpeldsp"
1943 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1944 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1945 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1946 cllc_decoder_select="bswapdsp"
1947 comfortnoise_encoder_select="lpc"
1948 cook_decoder_select="audiodsp mdct sinewin"
1949 cscd_decoder_select="lzo"
1950 cscd_decoder_suggest="zlib"
1951 dca_decoder_select="fmtconvert mdct"
1952 dds_decoder_select="texturedsp"
1953 dnxhd_decoder_select="blockdsp idctdsp"
1954 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1955 dvvideo_decoder_select="dvprofile idctdsp"
1956 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1957 dxa_decoder_deps="zlib"
1958 dxv_decoder_select="lzf texturedsp"
1959 eac3_decoder_select="ac3_decoder"
1960 eac3_encoder_select="ac3_encoder"
1961 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1962 eatgq_decoder_select="aandcttables idctdsp"
1963 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1964 exr_decoder_deps="zlib"
1965 ffv1_decoder_select="golomb rangecoder"
1966 ffv1_encoder_select="rangecoder"
1967 ffvhuff_decoder_select="huffyuv_decoder"
1968 ffvhuff_encoder_select="huffyuv_encoder"
1969 fic_decoder_select="golomb"
1970 flac_decoder_select="flacdsp golomb"
1971 flac_encoder_select="bswapdsp flacdsp golomb lpc"
1972 flashsv_decoder_deps="zlib"
1973 flashsv_encoder_deps="zlib"
1974 flashsv2_decoder_deps="zlib"
1975 flv_decoder_select="h263_decoder"
1976 flv_encoder_select="h263_encoder"
1977 fourxm_decoder_select="blockdsp bswapdsp"
1978 fraps_decoder_select="bswapdsp huffman"
1979 g2m_decoder_deps="zlib"
1980 g2m_decoder_select="blockdsp idctdsp jpegtables"
1981 h261_decoder_select="mpeg_er mpegvideo"
1982 h261_encoder_select="aandcttables mpegvideoenc"
1983 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
1984 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
1985 h263i_decoder_select="h263_decoder"
1986 h263p_encoder_select="h263_encoder"
1987 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
1988 h264_decoder_suggest="error_resilience"
1989 hap_decoder_select="snappy texturedsp"
1990 hap_encoder_deps="libsnappy"
1991 hap_encoder_select="texturedspenc"
1992 hevc_decoder_select="bswapdsp cabac golomb videodsp"
1993 huffyuv_decoder_select="bswapdsp huffyuvdsp"
1994 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
1995 iac_decoder_select="imc_decoder"
1996 imc_decoder_select="bswapdsp fft mdct sinewin"
1997 indeo3_decoder_select="hpeldsp"
1998 indeo4_decoder_select="ividsp"
1999 indeo5_decoder_select="ividsp"
2000 interplay_video_decoder_select="hpeldsp"
2001 jpegls_decoder_select="golomb mjpeg_decoder"
2002 jpegls_encoder_select="golomb"
2003 jv_decoder_select="blockdsp"
2004 lagarith_decoder_select="huffyuvdsp"
2005 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2006 loco_decoder_select="golomb"
2007 magicyuv_decoder_select="huffyuvdsp"
2008 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2009 metasound_decoder_select="lsp mdct sinewin"
2010 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2011 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2012 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2013 mjpegb_decoder_select="mjpeg_decoder"
2014 mlp_decoder_select="mlp_parser"
2015 motionpixels_decoder_select="bswapdsp"
2016 mp1_decoder_select="mpegaudio"
2017 mp1float_decoder_select="mpegaudio"
2018 mp2_decoder_select="mpegaudio"
2019 mp2float_decoder_select="mpegaudio"
2020 mp3_decoder_select="mpegaudio"
2021 mp3adu_decoder_select="mpegaudio"
2022 mp3adufloat_decoder_select="mpegaudio"
2023 mp3float_decoder_select="mpegaudio"
2024 mp3on4_decoder_select="mpegaudio"
2025 mp3on4float_decoder_select="mpegaudio"
2026 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2027 mpc8_decoder_select="mpegaudiodsp"
2028 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2029 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2030 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2031 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2032 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2033 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2034 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2035 mpeg4_encoder_select="h263_encoder"
2036 msa1_decoder_select="mss34dsp"
2037 msmpeg4v1_decoder_select="h263_decoder"
2038 msmpeg4v2_decoder_select="h263_decoder"
2039 msmpeg4v2_encoder_select="h263_encoder"
2040 msmpeg4v3_decoder_select="h263_decoder"
2041 msmpeg4v3_encoder_select="h263_encoder"
2042 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2043 mts2_decoder_select="mss34dsp"
2044 mxpeg_decoder_select="mjpeg_decoder"
2045 nellymoser_decoder_select="mdct sinewin"
2046 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2047 nuv_decoder_select="idctdsp lzo"
2048 on2avc_decoder_select="mdct"
2049 opus_decoder_deps="avresample"
2050 opus_decoder_select="imdct15"
2051 png_decoder_deps="zlib"
2052 png_encoder_deps="zlib"
2053 png_encoder_select="huffyuvencdsp"
2054 prores_decoder_select="idctdsp"
2055 prores_encoder_select="fdctdsp"
2056 qcelp_decoder_select="lsp"
2057 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2058 ra_144_encoder_select="audio_frame_queue lpc"
2059 ralf_decoder_select="golomb"
2060 rscc_decoder_deps="zlib"
2061 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2062 rv10_encoder_select="h263_encoder"
2063 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2064 rv20_encoder_select="h263_encoder"
2065 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2066 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2067 screenpresso_decoder_deps="zlib"
2068 shorten_decoder_select="golomb"
2069 sipr_decoder_select="lsp"
2070 sp5x_decoder_select="mjpeg_decoder"
2071 svq1_decoder_select="hpeldsp"
2072 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2073 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2074 svq3_decoder_suggest="zlib"
2075 tak_decoder_select="audiodsp"
2076 tdsc_decoder_deps="zlib"
2077 tdsc_decoder_select="mjpeg_decoder"
2078 theora_decoder_select="vp3_decoder"
2079 thp_decoder_select="mjpeg_decoder"
2080 tiff_decoder_suggest="zlib"
2081 tiff_encoder_suggest="zlib"
2082 truehd_decoder_select="mlp_decoder"
2083 truemotion2_decoder_select="bswapdsp"
2084 truespeech_decoder_select="bswapdsp"
2085 tscc_decoder_deps="zlib"
2086 txd_decoder_select="texturedsp"
2087 twinvq_decoder_select="mdct lsp sinewin"
2088 utvideo_decoder_select="bswapdsp"
2089 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2090 vble_decoder_select="huffyuvdsp"
2091 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2092 vc1image_decoder_select="vc1_decoder"
2093 vorbis_decoder_select="mdct"
2094 vorbis_encoder_select="mdct"
2095 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2096 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2097 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2098 vp6a_decoder_select="vp6_decoder"
2099 vp6f_decoder_select="vp6_decoder"
2100 vp7_decoder_select="h264pred videodsp vp8dsp"
2101 vp8_decoder_select="h264pred videodsp vp8dsp"
2102 vp9_decoder_select="videodsp"
2103 webp_decoder_select="vp8_decoder"
2104 wmapro_decoder_select="mdct sinewin wma_freqs"
2105 wmav1_decoder_select="mdct sinewin wma_freqs"
2106 wmav1_encoder_select="mdct sinewin wma_freqs"
2107 wmav2_decoder_select="mdct sinewin wma_freqs"
2108 wmav2_encoder_select="mdct sinewin wma_freqs"
2109 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2110 wmv1_decoder_select="h263_decoder"
2111 wmv1_encoder_select="h263_encoder"
2112 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2113 wmv2_encoder_select="h263_encoder wmv2dsp"
2114 wmv3_decoder_select="vc1_decoder"
2115 wmv3image_decoder_select="wmv3_decoder"
2116 zerocodec_decoder_deps="zlib"
2117 zlib_decoder_deps="zlib"
2118 zlib_encoder_deps="zlib"
2119 zmbv_decoder_deps="zlib"
2120 zmbv_encoder_deps="zlib"
2121
2122 # hardware accelerators
2123 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2124 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2125 vaapi_deps="va_va_h"
2126 vda_deps="VideoDecodeAcceleration_VDADecoder_h pthreads"
2127 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2128 vdpau_deps="vdpau_vdpau_h vdpau_vdpau_x11_h"
2129
2130 h263_vaapi_hwaccel_deps="vaapi"
2131 h263_vaapi_hwaccel_select="h263_decoder"
2132 h264_d3d11va_hwaccel_deps="d3d11va"
2133 h264_d3d11va_hwaccel_select="h264_decoder"
2134 h264_dxva2_hwaccel_deps="dxva2"
2135 h264_dxva2_hwaccel_select="h264_decoder"
2136 h264_mmal_hwaccel_deps="mmal"
2137 h264_qsv_hwaccel_deps="libmfx"
2138 h264_vaapi_hwaccel_deps="vaapi"
2139 h264_vaapi_hwaccel_select="h264_decoder"
2140 h264_vda_hwaccel_deps="vda"
2141 h264_vda_hwaccel_select="h264_decoder"
2142 h264_vda_old_hwaccel_deps="vda"
2143 h264_vda_old_hwaccel_select="h264_decoder"
2144 h264_vdpau_hwaccel_deps="vdpau"
2145 h264_vdpau_hwaccel_select="h264_decoder"
2146 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2147 hevc_d3d11va_hwaccel_select="hevc_decoder"
2148 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2149 hevc_dxva2_hwaccel_select="hevc_decoder"
2150 hevc_qsv_hwaccel_deps="libmfx"
2151 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2152 hevc_vdpau_hwaccel_select="hevc_decoder"
2153 mpeg1_vdpau_hwaccel_deps="vdpau"
2154 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2155 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2156 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2157 mpeg2_dxva2_hwaccel_deps="dxva2"
2158 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2159 mpeg2_mmal_hwaccel_deps="mmal"
2160 mpeg2_qsv_hwaccel_deps="libmfx"
2161 mpeg2_vaapi_hwaccel_deps="vaapi"
2162 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2163 mpeg2_vdpau_hwaccel_deps="vdpau"
2164 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2165 mpeg4_vaapi_hwaccel_deps="vaapi"
2166 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2167 mpeg4_vdpau_hwaccel_deps="vdpau"
2168 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2169 vc1_d3d11va_hwaccel_deps="d3d11va"
2170 vc1_d3d11va_hwaccel_select="vc1_decoder"
2171 vc1_dxva2_hwaccel_deps="dxva2"
2172 vc1_dxva2_hwaccel_select="vc1_decoder"
2173 vc1_mmal_hwaccel_deps="mmal"
2174 vc1_qsv_hwaccel_deps="libmfx"
2175 vc1_vaapi_hwaccel_deps="vaapi"
2176 vc1_vaapi_hwaccel_select="vc1_decoder"
2177 vc1_vdpau_hwaccel_deps="vdpau"
2178 vc1_vdpau_hwaccel_select="vc1_decoder"
2179 vp8_qsv_hwaccel_deps="libmfx"
2180 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2181 vp8_vaapi_hwaccel_select="vp8_decoder"
2182 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2183 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2184 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2185 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2186
2187 # hardware-accelerated codecs
2188 nvenc_deps_any="dlopen LoadLibrary"
2189 nvenc_extralibs='$ldl'
2190 omx_deps="dlopen pthreads"
2191 omx_extralibs='$ldl'
2192 qsvdec_select="qsv"
2193 qsvenc_select="qsv"
2194 vaapi_encode_deps="vaapi"
2195
2196 hwupload_cuda_filter_deps="cuda"
2197 scale_npp_filter_deps="cuda libnpp"
2198
2199 h264_mmal_decoder_deps="mmal"
2200 h264_nvenc_encoder_deps="nvenc"
2201 h264_omx_encoder_deps="omx"
2202 h264_qsv_decoder_deps="libmfx"
2203 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2204 h264_qsv_encoder_deps="libmfx"
2205 h264_qsv_encoder_select="qsvenc"
2206 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2207 h264_vaapi_encoder_select="vaapi_encode golomb"
2208 hevc_nvenc_encoder_deps="nvenc"
2209 hevc_qsv_decoder_deps="libmfx"
2210 hevc_qsv_encoder_deps="libmfx"
2211 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2212 hevc_qsv_encoder_select="qsvenc"
2213 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2214 hevc_vaapi_encoder_select="vaapi_encode golomb"
2215 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2216 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2217 mpeg2_mmal_decoder_deps="mmal"
2218 mpeg2_qsv_decoder_deps="libmfx"
2219 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2220 mpeg2_qsv_encoder_deps="libmfx"
2221 mpeg2_qsv_encoder_select="qsvenc"
2222 mpeg4_omx_encoder_deps="omx"
2223 vc1_mmal_decoder_deps="mmal"
2224 vc1_qsv_decoder_deps="libmfx"
2225 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2226 vp8_qsv_decoder_deps="libmfx"
2227 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2228
2229 nvenc_h264_encoder_deps="nvenc"
2230 nvenc_hevc_encoder_deps="nvenc"
2231
2232 # parsers
2233 h264_parser_select="golomb h264dsp h264parse"
2234 hevc_parser_select="golomb"
2235 mpegaudio_parser_select="mpegaudioheader"
2236 mpegvideo_parser_select="mpegvideo"
2237 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2238 vc1_parser_select="vc1dsp"
2239
2240 # bitstream_filters
2241 mjpeg2jpeg_bsf_select="jpegtables"
2242
2243 # external libraries
2244 libdcadec_decoder_deps="libdcadec"
2245 libfaac_encoder_deps="libfaac"
2246 libfaac_encoder_select="audio_frame_queue"
2247 libfdk_aac_decoder_deps="libfdk_aac"
2248 libfdk_aac_encoder_deps="libfdk_aac"
2249 libfdk_aac_encoder_select="audio_frame_queue"
2250 libgsm_decoder_deps="libgsm"
2251 libgsm_encoder_deps="libgsm"
2252 libgsm_ms_decoder_deps="libgsm"
2253 libgsm_ms_encoder_deps="libgsm"
2254 libilbc_decoder_deps="libilbc"
2255 libilbc_encoder_deps="libilbc"
2256 libkvazaar_encoder_deps="libkvazaar"
2257 libmp3lame_encoder_deps="libmp3lame"
2258 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2259 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2260 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2261 libopencore_amrnb_encoder_select="audio_frame_queue"
2262 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2263 libopenh264_decoder_deps="libopenh264"
2264 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2265 libopenh264_encoder_deps="libopenh264"
2266 libopenjpeg_decoder_deps="libopenjpeg"
2267 libopenjpeg_encoder_deps="libopenjpeg"
2268 libopus_decoder_deps="libopus"
2269 libopus_encoder_deps="libopus"
2270 libopus_encoder_select="audio_frame_queue"
2271 libschroedinger_decoder_deps="libschroedinger"
2272 libschroedinger_encoder_deps="libschroedinger"
2273 libspeex_decoder_deps="libspeex"
2274 libspeex_encoder_deps="libspeex"
2275 libspeex_encoder_select="audio_frame_queue"
2276 libtheora_encoder_deps="libtheora"
2277 libtwolame_encoder_deps="libtwolame"
2278 libvo_aacenc_encoder_deps="libvo_aacenc"
2279 libvo_aacenc_encoder_select="audio_frame_queue"
2280 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2281 libvorbis_encoder_deps="libvorbis"
2282 libvorbis_encoder_select="audio_frame_queue"
2283 libvpx_vp8_decoder_deps="libvpx"
2284 libvpx_vp8_encoder_deps="libvpx"
2285 libvpx_vp9_decoder_deps="libvpx"
2286 libvpx_vp9_encoder_deps="libvpx"
2287 libwavpack_encoder_deps="libwavpack"
2288 libwavpack_encoder_select="audio_frame_queue"
2289 libwebp_encoder_deps="libwebp"
2290 libx262_encoder_deps="libx262"
2291 libx264_encoder_deps="libx264"
2292 libx265_encoder_deps="libx265"
2293 libxavs_encoder_deps="libxavs"
2294 libxvid_encoder_deps="libxvid mkstemp"
2295
2296 # demuxers / muxers
2297 ac3_demuxer_select="ac3_parser"
2298 asf_demuxer_select="riffdec"
2299 asf_muxer_select="riffenc"
2300 asf_stream_muxer_select="asf_muxer"
2301 avi_demuxer_select="iso_media riffdec"
2302 avi_muxer_select="riffenc"
2303 avisynth_demuxer_deps="avisynth"
2304 avisynth_demuxer_select="riffdec"
2305 caf_demuxer_select="iso_media riffdec"
2306 dash_muxer_select="mp4_muxer"
2307 dirac_demuxer_select="dirac_parser"
2308 dv_demuxer_select="dvprofile"
2309 dv_muxer_select="dvprofile"
2310 dxa_demuxer_select="riffdec"
2311 eac3_demuxer_select="ac3_parser"
2312 f4v_muxer_select="mov_muxer"
2313 flac_demuxer_select="flac_parser"
2314 hds_muxer_select="flv_muxer"
2315 hls_muxer_select="mpegts_muxer"
2316 ipod_muxer_select="mov_muxer"
2317 ismv_muxer_select="mov_muxer"
2318 matroska_audio_muxer_select="matroska_muxer"
2319 matroska_demuxer_select="iso_media riffdec"
2320 matroska_demuxer_suggest="bzlib lzo zlib"
2321 matroska_muxer_select="iso_media riffenc"
2322 mmf_muxer_select="riffenc"
2323 mov_demuxer_select="iso_media riffdec"
2324 mov_demuxer_suggest="zlib"
2325 mov_muxer_select="iso_media riffenc rtpenc_chain"
2326 mp3_demuxer_select="mpegaudio_parser"
2327 mp3_muxer_select="mpegaudioheader"
2328 mp4_muxer_select="mov_muxer"
2329 mpegts_demuxer_select="iso_media"
2330 mpegts_muxer_select="adts_muxer latm_muxer"
2331 mpegtsraw_demuxer_select="mpegts_demuxer"
2332 mxf_d10_muxer_select="mxf_muxer"
2333 nut_muxer_select="riffenc"
2334 nuv_demuxer_select="riffdec"
2335 oga_muxer_select="ogg_muxer"
2336 ogg_demuxer_select="dirac_parse"
2337 opus_muxer_select="ogg_muxer"
2338 psp_muxer_select="mov_muxer"
2339 rtp_demuxer_select="sdp_demuxer"
2340 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2341 rtsp_demuxer_select="http_protocol rtpdec"
2342 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2343 sap_demuxer_select="sdp_demuxer"
2344 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2345 sdp_demuxer_select="rtpdec"
2346 smoothstreaming_muxer_select="ismv_muxer"
2347 spdif_muxer_select="aac_parser"
2348 spx_muxer_select="ogg_muxer"
2349 swf_demuxer_suggest="zlib"
2350 tak_demuxer_select="tak_parser"
2351 tg2_muxer_select="mov_muxer"
2352 tgp_muxer_select="mov_muxer"
2353 w64_demuxer_select="wav_demuxer"
2354 wav_demuxer_select="riffdec"
2355 wav_muxer_select="riffenc"
2356 webm_muxer_select="iso_media riffenc"
2357 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2358 wtv_demuxer_select="mpegts_demuxer riffdec"
2359 xmv_demuxer_select="riffdec"
2360 xwma_demuxer_select="riffdec"
2361
2362 # indevs / outdevs
2363 alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
2364 alsa_outdev_deps="alsa_asoundlib_h"
2365 avfoundation_indev_deps="AVFoundation_AVFoundation_h"
2366 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2367 dv1394_indev_deps="dv1394"
2368 dv1394_indev_select="dv_demuxer"
2369 fbdev_indev_deps="linux_fb_h"
2370 jack_indev_deps="jack_jack_h"
2371 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2372 libcdio_indev_deps="libcdio"
2373 libdc1394_indev_deps="libdc1394"
2374 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2375 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2376 pulse_indev_deps="libpulse"
2377 sndio_indev_deps="sndio_h"
2378 sndio_outdev_deps="sndio_h"
2379 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2380 vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
2381 vfwcap_indev_extralibs="-lavicap32"
2382 xcbgrab_indev_deps="libxcb"
2383
2384 # protocols
2385 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2386 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2387 ffrtmpcrypt_protocol_select="tcp_protocol"
2388 ffrtmphttp_protocol_deps="!librtmp_protocol"
2389 ffrtmphttp_protocol_select="http_protocol"
2390 gopher_protocol_select="network"
2391 http_protocol_select="tcp_protocol"
2392 httpproxy_protocol_select="tcp_protocol"
2393 https_protocol_select="tls_protocol"
2394 icecast_protocol_select="http_protocol"
2395 librtmp_protocol_deps="librtmp"
2396 librtmpe_protocol_deps="librtmp"
2397 librtmps_protocol_deps="librtmp"
2398 librtmpt_protocol_deps="librtmp"
2399 librtmpte_protocol_deps="librtmp"
2400 mmsh_protocol_select="http_protocol"
2401 mmst_protocol_select="network"
2402 rtmp_protocol_deps="!librtmp_protocol"
2403 rtmp_protocol_select="tcp_protocol"
2404 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2405 rtmps_protocol_deps="!librtmp_protocol"
2406 rtmps_protocol_select="tls_protocol"
2407 rtmpt_protocol_select="ffrtmphttp_protocol"
2408 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2409 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2410 rtp_protocol_select="udp_protocol"
2411 sctp_protocol_deps="struct_sctp_event_subscribe"
2412 sctp_protocol_select="network"
2413 srtp_protocol_select="rtp_protocol srtp"
2414 tcp_protocol_select="network"
2415 tls_gnutls_protocol_deps="gnutls"
2416 tls_gnutls_protocol_select="tcp_protocol"
2417 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2418 tls_openssl_protocol_select="tcp_protocol"
2419 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2420 udp_protocol_select="network"
2421 unix_protocol_deps="sys_un_h"
2422 unix_protocol_select="network"
2423
2424 # filters
2425 asyncts_filter_deps="avresample"
2426 blackframe_filter_deps="gpl"
2427 boxblur_filter_deps="gpl"
2428 bs2b_filter_deps="libbs2b"
2429 cropdetect_filter_deps="gpl"
2430 deinterlace_qsv_filter_deps="libmfx"
2431 delogo_filter_deps="gpl"
2432 drawtext_filter_deps="libfreetype"
2433 frei0r_filter_deps="frei0r dlopen"
2434 frei0r_filter_extralibs='$ldl'
2435 frei0r_src_filter_deps="frei0r dlopen"
2436 frei0r_src_filter_extralibs='$ldl'
2437 hdcd_filter_deps="libhdcd"
2438 hqdn3d_filter_deps="gpl"
2439 interlace_filter_deps="gpl"
2440 movie_filter_deps="avcodec avformat"
2441 ocv_filter_deps="libopencv"
2442 resample_filter_deps="avresample"
2443 scale_filter_deps="swscale"
2444 scale_qsv_filter_deps="libmfx"
2445 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2446
2447 # examples
2448 decode_audio_example_deps="avcodec avutil"
2449 decode_video_example_deps="avcodec avutil"
2450 encode_audio_example_deps="avcodec avutil"
2451 encode_video_example_deps="avcodec avutil"
2452 filter_audio_example_deps="avfilter avutil"
2453 metadata_example_deps="avformat avutil"
2454 output_example_deps="avcodec avformat avresample avutil swscale"
2455 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2456 transcode_aac_example_deps="avcodec avformat avresample"
2457
2458 # libraries, in linking order
2459 avcodec_deps="avutil"
2460 avdevice_deps="avformat avcodec avutil"
2461 avfilter_deps="avutil"
2462 avformat_deps="avcodec avutil"
2463 avresample_deps="avutil"
2464 swscale_deps="avutil"
2465
2466 # programs
2467 avconv_deps="avcodec avfilter avformat avresample swscale"
2468 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2469                fps_filter null_filter resample_filter scale_filter
2470                trim_filter"
2471 avplay_deps="avcodec avfilter avformat avresample sdl"
2472 avplay_libs='$sdl_libs'
2473 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2474 avprobe_deps="avcodec avformat"
2475
2476 # documentation
2477 pod2man_deps="doc"
2478 texi2html_deps="doc"
2479
2480 # default parameters
2481
2482 logfile="config.log"
2483
2484 # installation paths
2485 prefix_default="/usr/local"
2486 bindir_default='${prefix}/bin'
2487 datadir_default='${prefix}/share/avconv'
2488 docdir_default='${prefix}/share/doc/libav'
2489 incdir_default='${prefix}/include'
2490 libdir_default='${prefix}/lib'
2491 mandir_default='${prefix}/share/man'
2492 shlibdir_default="$libdir_default"
2493
2494 # toolchain
2495 ar_default="ar"
2496 cc_default="gcc"
2497 host_cc_default="gcc"
2498 ln_s="ln -s -f"
2499 nm_default="nm -g"
2500 objformat="elf"
2501 pkg_config_default=pkg-config
2502 ranlib="ranlib"
2503 strip="strip"
2504 version_script='--version-script'
2505 yasmexe="yasm"
2506
2507 # machine
2508 arch_default=$(uname -m)
2509 cpu="generic"
2510 intrinsics="none"
2511
2512 # OS
2513 target_os_default=$(tolower $(uname -s))
2514 host_os=$target_os_default
2515
2516 # configurable options
2517 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2518
2519 enable asm
2520 enable debug
2521 enable doc
2522 enable faan faandct faanidct
2523 enable optimizations
2524 enable safe_bitstream_reader
2525 enable static
2526 enable swscale_alpha
2527 enable valgrind_backtrace
2528
2529 # By default, enable only those hwaccels that have no external dependencies.
2530 enable d3d11va dxva2 vda vdpau
2531
2532 # build settings
2533 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2534 LIBPREF="lib"
2535 LIBSUF=".a"
2536 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2537 SLIBPREF="lib"
2538 SLIBSUF=".so"
2539 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2540 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2541 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2542 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2543 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2544 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2545 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2546
2547 asflags_filter=echo
2548 cflags_filter=echo
2549 ldflags_filter=echo
2550
2551 AS_C='-c'
2552 AS_O='-o $@'
2553 CC_C='-c'
2554 CC_E='-E -o $@'
2555 CC_O='-o $@'
2556 OBJCC_C='-c'
2557 OBJCC_E='-E -o $@'
2558 OBJCC_O='-o $@'
2559 LD_O='-o $@'
2560 LD_LIB='-l%'
2561 LD_PATH='-L'
2562 HOSTCC_C='-c'
2563 HOSTCC_E='-E -o $@'
2564 HOSTCC_O='-o $@'
2565 HOSTLD_O='-o $@'
2566
2567 host_libs='-lm'
2568 host_cflags_filter=echo
2569 host_ldflags_filter=echo
2570
2571 target_path='$(CURDIR)'
2572
2573 # since the object filename is not given with the -MM flag, the compiler
2574 # is only able to print the basename, and we must add the path ourselves
2575 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2576 DEPFLAGS='-MM'
2577
2578 # find source path
2579 if test -f configure; then
2580     source_path=.
2581 else
2582     source_path=$(cd $(dirname "$0"); pwd)
2583     echo "$source_path" | grep -q '[[:blank:]]' &&
2584         die "Out of tree builds are impossible with whitespace in source path."
2585     test -e "$source_path/config.h" &&
2586         die "Out of tree builds are impossible with config.h in source dir."
2587 fi
2588
2589 for v in "$@"; do
2590     r=${v#*=}
2591     l=${v%"$r"}
2592     r=$(sh_quote "$r")
2593     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2594 done
2595
2596 find_things(){
2597     thing=$1
2598     pattern=$2
2599     file=$source_path/$3
2600     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2601 }
2602
2603 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2604 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2605 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2606 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2607 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2608 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2609 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2610 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2611 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2612
2613 find_things_extern(){
2614     thing=$1
2615     pattern=$2
2616     file=$source_path/$3
2617     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2618 }
2619
2620 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2621 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2622
2623 ALL_COMPONENTS="
2624     $BSF_LIST
2625     $DECODER_LIST
2626     $DEMUXER_LIST
2627     $ENCODER_LIST
2628     $FILTER_LIST
2629     $HWACCEL_LIST
2630     $INDEV_LIST
2631     $MUXER_LIST
2632     $OUTDEV_LIST
2633     $PARSER_LIST
2634     $PROTOCOL_LIST
2635 "
2636
2637 for n in $COMPONENT_LIST; do
2638     v=$(toupper ${n%s})_LIST
2639     eval enable \$$v
2640     eval ${n}_if_any="\$$v"
2641 done
2642
2643 enable $ARCH_EXT_LIST
2644
2645 die_unknown(){
2646     echo "Unknown option \"$1\"."
2647     echo "See $0 --help for available options."
2648     exit 1
2649 }
2650
2651 print_3_columns() {
2652     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2653 }
2654
2655 show_list() {
2656     suffix=_$1
2657     shift
2658     echo $* | sed s/$suffix//g | print_3_columns
2659     exit 0
2660 }
2661
2662 rand_list(){
2663     IFS=', '
2664     set -- $*
2665     unset IFS
2666     for thing; do
2667         comp=${thing%:*}
2668         prob=${thing#$comp}
2669         prob=${prob#:}
2670         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2671         echo "prob ${prob:-0.5}"
2672         printf '%s\n' $comp
2673     done
2674 }
2675
2676 do_random(){
2677     action=$1
2678     shift
2679     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2680     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2681 }
2682
2683 for opt do
2684     optval="${opt#*=}"
2685     case "$opt" in
2686         --extra-ldflags=*)
2687             add_ldflags $optval
2688         ;;
2689         --extra-ldexeflags=*)
2690             add_ldexeflags $optval
2691         ;;
2692         --extra-libs=*)
2693             add_extralibs $optval
2694         ;;
2695         --disable-devices)
2696             disable $INDEV_LIST $OUTDEV_LIST
2697         ;;
2698         --enable-debug=*)
2699             debuglevel="$optval"
2700         ;;
2701         --disable-programs)
2702             disable $PROGRAM_LIST
2703         ;;
2704         --disable-everything)
2705             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2706         ;;
2707         --disable-all)
2708             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2709             disable $LIBRARY_LIST $PROGRAM_LIST doc
2710         ;;
2711         --enable-random|--disable-random)
2712             action=${opt%%-random}
2713             do_random ${action#--} $COMPONENT_LIST
2714         ;;
2715         --enable-random=*|--disable-random=*)
2716             action=${opt%%-random=*}
2717             do_random ${action#--} $optval
2718         ;;
2719         --enable-*=*|--disable-*=*)
2720             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2721             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2722             eval list=\$$(toupper $thing)_LIST
2723             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2724             $action $(filter "$name" $list)
2725         ;;
2726         --enable-avserver|--disable-avserver*)
2727             warn "avserver has been removed, the ${opt} option is only"\
2728                  "provided for compatibility and will be removed in the future"
2729         ;;
2730         --enable-?*|--disable-?*)
2731             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2732             if is_in $option $COMPONENT_LIST; then
2733                 test $action = disable && action=unset
2734                 eval $action \$$(toupper ${option%s})_LIST
2735             elif is_in $option $CMDLINE_SELECT; then
2736                 $action $option
2737             else
2738                 die_unknown $opt
2739             fi
2740         ;;
2741         --list-*)
2742             NAME="${opt#--list-}"
2743             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2744             NAME=${NAME%s}
2745             eval show_list $NAME \$$(toupper $NAME)_LIST
2746         ;;
2747         --help|-h) show_help
2748         ;;
2749         --quiet|-q) quiet=yes
2750         ;;
2751         *)
2752             optname="${opt%%=*}"
2753             optname="${optname#--}"
2754             optname=$(echo "$optname" | sed 's/-/_/g')
2755             if is_in $optname $CMDLINE_SET; then
2756                 eval $optname='$optval'
2757             elif is_in $optname $CMDLINE_APPEND; then
2758                 append $optname "$optval"
2759             else
2760                 die_unknown $opt
2761             fi
2762         ;;
2763     esac
2764 done
2765
2766 for e in $env; do
2767     eval "export $e"
2768 done
2769
2770 disabled logging && logfile=/dev/null
2771
2772 # Die early if licensing-related configure options are incompatible.
2773 die_license_disabled() {
2774     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2775 }
2776
2777 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2778 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2779 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2780
2781 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2782
2783 # Disable all the library-specific components if the library itself
2784 # is disabled, see AVCODEC_LIST and following _LIST variables.
2785
2786 disable_components(){
2787     disabled ${1} && disable $(
2788         eval components="\$$(toupper ${1})_COMPONENTS"
2789         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2790     )
2791 }
2792
2793 map 'disable_components $v' $LIBRARY_LIST
2794
2795 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2796 set >> $logfile
2797
2798 case "$toolchain" in
2799     *-asan)
2800         cc_default="${toolchain%-asan}"
2801         add_cflags  -fsanitize=address
2802         add_ldflags -fsanitize=address
2803     ;;
2804     *-msan)
2805         cc_default="${toolchain%-msan}"
2806         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2807         add_ldflags -fsanitize=memory
2808     ;;
2809     *-tsan)
2810         cc_default="${toolchain%-tsan}"
2811         add_cflags  -fsanitize=thread -pie
2812         add_ldflags -fsanitize=thread -pie
2813         case "$toolchain" in
2814             gcc-tsan)
2815                 add_cflags  -fPIC
2816                 add_ldflags -fPIC
2817                 ;;
2818         esac
2819     ;;
2820     *-usan)
2821         cc_default="${toolchain%-usan}"
2822         add_cflags  -fsanitize=undefined
2823         add_ldflags -fsanitize=undefined
2824         case "$toolchain" in
2825             clang-usan)
2826                 add_cflags -O1
2827                 ;;
2828         esac
2829     ;;
2830     valgrind-*)
2831         target_exec_default="valgrind"
2832         case "$toolchain" in
2833             valgrind-massif)
2834                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2835                 ;;
2836             valgrind-memcheck)
2837                 target_exec_args="--track-origins=yes --leak-check=full"
2838                 ;;
2839         esac
2840     ;;
2841     msvc)
2842         # Check whether the current MSVC version needs the C99 converter.
2843         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2844         # support enough of C99 to build libav. Default to the new
2845         # behaviour if the regexp was unable to match anything, since this
2846         # successfully parses the version number of existing supported
2847         # versions that require the converter (MSVC 2010 and 2012).
2848         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2849         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2850             cc_default="cl"
2851         else
2852             cc_default="c99wrap cl"
2853         fi
2854         ld_default="$source_path/compat/windows/mslink"
2855         nm_default="dumpbin -symbols"
2856         ar_default="lib"
2857         case "$arch" in
2858         arm*)
2859             as_default="armasm"
2860             ;;
2861         esac
2862         target_os_default="win32"
2863         # Use a relative path for TMPDIR. This makes sure all the
2864         # ffconf temp files are written with a relative path, avoiding
2865         # issues with msys/win32 path conversion for MSVC parameters
2866         # such as -Fo<file> or -out:<file>.
2867         TMPDIR=.
2868     ;;
2869     icl)
2870         cc_default="icl"
2871         ld_default="xilink"
2872         nm_default="dumpbin -symbols"
2873         ar_default="xilib"
2874         target_os_default="win32"
2875         TMPDIR=.
2876     ;;
2877     gcov)
2878         add_cflags  -fprofile-arcs -ftest-coverage
2879         add_ldflags -fprofile-arcs -ftest-coverage
2880     ;;
2881     llvm-cov)
2882         add_cflags -fprofile-arcs -ftest-coverage
2883         add_ldflags --coverage
2884     ;;
2885     hardened)
2886         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2887         add_cflags   -fno-strict-overflow -fstack-protector-all
2888         add_ldflags  -Wl,-z,relro -Wl,-z,now
2889     ;;
2890     ?*)
2891         die "Unknown toolchain $toolchain"
2892     ;;
2893 esac
2894
2895 test -n "$cross_prefix" && enable cross_compile
2896
2897 if enabled cross_compile; then
2898     test -n "$arch" && test -n "$target_os" ||
2899         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2900 fi
2901
2902 ar_default="${cross_prefix}${ar_default}"
2903 cc_default="${cross_prefix}${cc_default}"
2904 occ_default="${cross_prefix}${occ_default}"
2905 nm_default="${cross_prefix}${nm_default}"
2906 pkg_config_default="${cross_prefix}${pkg_config_default}"
2907 ranlib="${cross_prefix}${ranlib}"
2908 strip="${cross_prefix}${strip}"
2909
2910 sysinclude_default="${sysroot}/usr/include"
2911
2912 set_default arch cc pkg_config sysinclude target_exec target_os
2913 enabled cross_compile || host_cc_default=$cc
2914 set_default host_cc
2915
2916 if ! $pkg_config --version >/dev/null 2>&1; then
2917     warn "$pkg_config not found, library detection may fail."
2918     pkg_config=false
2919 fi
2920
2921 exesuf() {
2922     case $1 in
2923         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2924     esac
2925 }
2926
2927 EXESUF=$(exesuf $target_os)
2928 HOSTEXESUF=$(exesuf $host_os)
2929
2930 # set temporary file name
2931 : ${TMPDIR:=$TEMPDIR}
2932 : ${TMPDIR:=$TMP}
2933 : ${TMPDIR:=/tmp}
2934
2935 if ! check_cmd mktemp -u XXXXXX; then
2936     # simple replacement for missing mktemp
2937     # NOT SAFE FOR GENERAL USE
2938     mktemp(){
2939         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2940     }
2941 fi
2942
2943 tmpfile(){
2944     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2945         (set -C; exec > $tmp) 2>/dev/null ||
2946         die "Unable to create temporary file in $TMPDIR."
2947     append TMPFILES $tmp
2948     eval $1=$tmp
2949 }
2950
2951 trap 'rm -f -- $TMPFILES' EXIT
2952
2953 tmpfile TMPASM .asm
2954 tmpfile TMPC   .c
2955 tmpfile TMPE   $EXESUF
2956 tmpfile TMPH   .h
2957 tmpfile TMPO   .o
2958 tmpfile TMPS   .S
2959 tmpfile TMPSH  .sh
2960 tmpfile TMPV   .ver
2961
2962 unset -f mktemp
2963
2964 chmod +x $TMPE
2965
2966 # make sure we can execute files in $TMPDIR
2967 cat > $TMPSH 2>> $logfile <<EOF
2968 #! /bin/sh
2969 EOF
2970 chmod +x $TMPSH >> $logfile 2>&1
2971 if ! $TMPSH >> $logfile 2>&1; then
2972     cat <<EOF
2973 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2974 variable to another directory and make sure that it is not mounted noexec.
2975 EOF
2976     die "Sanity test failed."
2977 fi
2978
2979 armasm_flags(){
2980     for flag; do
2981         case $flag in
2982             # Filter out MSVC cl.exe options from cflags that shouldn't
2983             # be passed to gas-preprocessor
2984             -M[TD]*)                                            ;;
2985             *)                  echo $flag                      ;;
2986         esac
2987    done
2988 }
2989
2990 ccc_flags(){
2991     for flag; do
2992         case $flag in
2993             -std=c99)           echo -c99                       ;;
2994             -mcpu=*)            echo -arch ${flag#*=}           ;;
2995             -mieee)             echo -ieee                      ;;
2996             -O*|-fast)          echo $flag                      ;;
2997             -fno-math-errno)    echo -assume nomath_errno       ;;
2998             -g)                 echo -g3                        ;;
2999             -Wall)              echo -msg_enable level2         ;;
3000             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3001             -Wl,*)              echo $flag                      ;;
3002             -f*|-W*)                                            ;;
3003             *)                  echo $flag                      ;;
3004         esac
3005    done
3006 }
3007
3008 cparser_flags(){
3009     for flag; do
3010         case $flag in
3011             -Wno-switch)             echo -Wno-switch-enum ;;
3012             -Wno-format-zero-length) ;;
3013             -Wdisabled-optimization) ;;
3014             -Wno-pointer-sign)       echo -Wno-other ;;
3015             *)                       echo $flag ;;
3016         esac
3017     done
3018 }
3019
3020 msvc_common_flags(){
3021     for flag; do
3022         case $flag in
3023             # In addition to specifying certain flags under the compiler
3024             # specific filters, they must be specified here as well or else the
3025             # generic catch all at the bottom will print the original flag.
3026             -Wall)                ;;
3027             -std=c99)             ;;
3028             # Common flags
3029             -fomit-frame-pointer) ;;
3030             -g)                   echo -Z7 ;;
3031             -fno-math-errno)      ;;
3032             -fno-common)          ;;
3033             -fno-signed-zeros)    ;;
3034             -fPIC)                ;;
3035             -mthumb)              ;;
3036             -march=*)             ;;
3037             -lz)                  echo zlib.lib ;;
3038             -lavicap32)           echo vfw32.lib user32.lib ;;
3039             -lx264)               echo libx264.lib ;;
3040             -l*)                  echo ${flag#-l}.lib ;;
3041             -L*)                  echo -libpath:${flag#-L} ;;
3042             *)                    echo $flag ;;
3043         esac
3044     done
3045 }
3046
3047 msvc_flags(){
3048     msvc_common_flags "$@"
3049     for flag; do
3050         case $flag in
3051             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3052                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3053                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3054                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3055         esac
3056     done
3057 }
3058
3059 icl_flags(){
3060     msvc_common_flags "$@"
3061     for flag; do
3062         case $flag in
3063             # Despite what Intel's documentation says -Wall, which is supported
3064             # on Windows, does enable remarks so disable them here.
3065             -Wall)                echo $flag -Qdiag-disable:remark ;;
3066             -std=c99)             echo -Qstd=c99 ;;
3067         esac
3068     done
3069 }
3070
3071 pgi_flags(){
3072     for flag; do
3073         case $flag in
3074             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3075             -fomit-frame-pointer) echo -Mnoframe ;;
3076             -g)                   echo -gopt ;;
3077             *)                    echo $flag ;;
3078         esac
3079     done
3080 }
3081
3082 suncc_flags(){
3083     for flag; do
3084         case $flag in
3085             -march=*|-mcpu=*)
3086                 case "${flag#*=}" in
3087                     native)                   echo -xtarget=native       ;;
3088                     v9|niagara)               echo -xarch=sparc          ;;
3089                     ultrasparc)               echo -xarch=sparcvis       ;;
3090                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3091                     i586|pentium)             echo -xchip=pentium        ;;
3092                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3093                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3094                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3095                     pentium4*)          echo -xtarget=pentium4           ;;
3096                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3097                     *-sse3)             echo -xarch=sse3                 ;;
3098                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3099                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3100                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3101                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3102                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3103                     k8|opteron|athlon64|athlon-fx)
3104                                                echo -xarch=sse2a         ;;
3105                     athlon*)                   echo -xarch=pentium_proa  ;;
3106                 esac
3107                 ;;
3108             -std=c99)             echo -xc99              ;;
3109             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3110             -fPIC)                echo -KPIC -xcode=pic32 ;;
3111             -W*,*)                echo $flag              ;;
3112             -f*-*|-W*|-mimpure-text)                      ;;
3113             -shared)              echo -G                 ;;
3114             *)                    echo $flag              ;;
3115         esac
3116     done
3117 }
3118
3119 tms470_flags(){
3120     for flag; do
3121         case $flag in
3122             -march=*|-mcpu=*)
3123                 case "${flag#*=}" in
3124                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3125                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3126                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3127                     armv6*|arm11*)          echo -mv=6   ;;
3128                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3129                                             echo -mv=5e  ;;
3130                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3131                 esac
3132                 ;;
3133             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3134             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3135             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3136             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3137             -msoft-float)   echo --float_support=vfplib       ;;
3138             -O[0-3]|-mf=*)  echo $flag                        ;;
3139             -g)             echo -g -mn                       ;;
3140             -pds=*)         echo $flag                        ;;
3141             -D*|-I*)        echo $flag                        ;;
3142             --gcc|--abi=*)  echo $flag                        ;;
3143             -me)            echo $flag                        ;;
3144         esac
3145     done
3146 }
3147
3148 probe_cc(){
3149     pfx=$1
3150     _cc=$2
3151
3152     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3153     unset _ld_o _ldflags _ld_lib _ld_path
3154     unset _depflags _DEPCMD _DEPFLAGS
3155     _flags_filter=echo
3156
3157     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3158         _type=llvm_gcc
3159         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3160         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3161         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3162         _cflags_speed='-O3'
3163         _cflags_size='-Os'
3164     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3165         _type=gcc
3166         gcc_version=$($_cc --version | head -n1)
3167         gcc_basever=$($_cc -dumpversion)
3168         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3169         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3170         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3171         if ! $_cc -dumpversion | grep -q '^2\.'; then
3172             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3173         fi
3174         _cflags_speed='-O3'
3175         _cflags_size='-Os'
3176     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3177         _type=icc
3178         _ident=$($_cc --version | head -n1)
3179         _depflags='-MMD'
3180         _cflags_speed='-O3'
3181         _cflags_size='-Os'
3182         _cflags_noopt='-O1'
3183     elif $_cc -v 2>&1 | grep -q xlc; then
3184         _type=xlc
3185         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3186         _cflags_speed='-O5'
3187         _cflags_size='-O5 -qcompact'
3188     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3189         _type=ccc
3190         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3191         _DEPFLAGS='-M'
3192         _cflags_speed='-fast'
3193         _cflags_size='-O1'
3194         _flags_filter=ccc_flags
3195     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3196         test -d "$sysroot" || die "No valid sysroot specified."
3197         _type=armcc
3198         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3199         armcc_conf="$PWD/armcc.conf"
3200         $_cc --arm_linux_configure                 \
3201              --arm_linux_config_file="$armcc_conf" \
3202              --configure_sysroot="$sysroot"        \
3203              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3204              die "Error creating armcc configuration file."
3205         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3206         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3207         as_default="${cross_prefix}gcc"
3208         _depflags='-MMD'
3209         _cflags_speed='-O3'
3210         _cflags_size='-Os'
3211     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3212         _type=tms470
3213         _ident=$($_cc -version | head -n1 | tr -s ' ')
3214         _flags='--gcc --abi=eabi -me'
3215         _cc_e='-ppl -fe=$@'
3216         _cc_o='-fe=$@'
3217         _depflags='-ppa -ppd=$(@:.o=.d)'
3218         _cflags_speed='-O3 -mf=5'
3219         _cflags_size='-O3 -mf=2'
3220         _flags_filter=tms470_flags
3221     elif $_cc -v 2>&1 | grep -q clang; then
3222         _type=clang
3223         _ident=$($_cc --version 2>/dev/null | head -n1)
3224         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3225         _cflags_speed='-O3'
3226         _cflags_size='-Os'
3227     elif $_cc -V 2>&1 | grep -q Sun; then
3228         _type=suncc
3229         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3230         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3231         _DEPFLAGS='-xM1 -xc99'
3232         _ldflags='-std=c99'
3233         _cflags_speed='-O5'
3234         _cflags_size='-O5 -xspace'
3235         _flags_filter=suncc_flags
3236     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3237         _type=pathscale
3238         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3239         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3240         _cflags_speed='-O2'
3241         _cflags_size='-Os'
3242         _flags_filter='filter_out -Wdisabled-optimization'
3243     elif $_cc -v 2>&1 | grep -q Open64; then
3244         _type=open64
3245         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3246         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3247         _cflags_speed='-O2'
3248         _cflags_size='-Os'
3249         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3250     elif $_cc -V 2>&1 | grep -q Portland; then
3251         _type=pgi
3252         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3253         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3254         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3255         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3256         _cflags_noopt="-O1"
3257         _flags_filter=pgi_flags
3258     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3259         _type=armasm
3260         _ident=$($_cc | head -n1)
3261         # 4509: "This form of conditional instruction is deprecated"
3262         _flags="-nologo -ignore 4509"
3263         _flags_filter=armasm_flags
3264     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3265         _type=msvc
3266         _ident=$($_cc 2>&1 | head -n1)
3267         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3268         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3269         _cflags_speed="-O2"
3270         _cflags_size="-O1"
3271         if $_cc -nologo- 2>&1 | grep -q Linker; then
3272             _ld_o='-out:$@'
3273         else
3274             _ld_o='-Fe$@'
3275         fi
3276         _cc_o='-Fo$@'
3277         _cc_e='-P -Fi$@'
3278         _flags_filter=msvc_flags
3279         _ld_lib='lib%.a'
3280         _ld_path='-libpath:'
3281         _flags='-nologo'
3282     elif $_cc 2>&1 | grep -q Intel; then
3283         _type=icl
3284         _ident=$($_cc 2>&1 | head -n1)
3285         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3286         # Not only is O3 broken on 13.x+ but it is slower on all previous
3287         # versions (tested) as well.
3288         _cflags_speed="-O2"
3289         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3290         if $_cc 2>&1 | grep -q Linker; then
3291             _ld_o='-out:$@'
3292         else
3293             _ld_o='-Fe$@'
3294         fi
3295         _cc_o='-Fo$@'
3296         _cc_e='-P'
3297         _flags_filter=icl_flags
3298         _ld_lib='lib%.a'
3299         _ld_path='-libpath:'
3300         # -Qdiag-error to make icl error when seeing certain unknown arguments
3301         _flags='-nologo -Qdiag-error:4044,10157'
3302         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3303         # with MSVC which enables it by default.
3304         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3305     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3306         # lld can emulate multiple different linkers; in ms link.exe mode,
3307         # the -? parameter gives the help output which contains an identifyable
3308         # string, while it gives an error in other modes.
3309         _type=lld-link
3310         # The link.exe mode doesn't have a switch for getting the version,
3311         # but we can force it back to gnu mode and get the version from there.
3312         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3313         _ld_o='-out:$@'
3314         _flags_filter=msvc_flags
3315         _ld_lib='lib%.a'
3316         _ld_path='-libpath:'
3317     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3318         _type=cparser
3319         _ident=$($_cc --version | head -n1)
3320         _depflags='-MMD'
3321         _cflags_speed='-O4'
3322         _cflags_size='-O2'
3323         _flags_filter=cparser_flags
3324     fi
3325
3326     eval ${pfx}_type=\$_type
3327     eval ${pfx}_ident=\$_ident
3328 }
3329
3330 set_ccvars(){
3331     eval ${1}_C=\${_cc_c-\${${1}_C}}
3332     eval ${1}_E=\${_cc_e-\${${1}_E}}
3333     eval ${1}_O=\${_cc_o-\${${1}_O}}
3334
3335     if [ -n "$_depflags" ]; then
3336         eval ${1}_DEPFLAGS=\$_depflags
3337     else
3338         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3339         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3340         eval DEP${1}FLAGS=\$_flags
3341     fi
3342 }
3343
3344 probe_cc cc "$cc"
3345 cflags_filter=$_flags_filter
3346 cflags_speed=$_cflags_speed
3347 cflags_size=$_cflags_size
3348 cflags_noopt=$_cflags_noopt
3349 add_cflags $_flags $_cflags
3350 cc_ldflags=$_ldflags
3351 set_ccvars CC
3352
3353 probe_cc hostcc "$host_cc"
3354 host_cflags_filter=$_flags_filter
3355 add_host_cflags  $_flags $_cflags
3356 set_ccvars HOSTCC
3357
3358 test -n "$cc_type" && enable $cc_type ||
3359     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3360
3361 : ${as_default:=$cc}
3362 : ${objcc_default:=$cc}
3363 : ${dep_cc_default:=$cc}
3364 : ${ld_default:=$cc}
3365 : ${host_ld_default:=$host_cc}
3366 set_default ar as objcc dep_cc ld host_ld
3367
3368 probe_cc as "$as"
3369 asflags_filter=$_flags_filter
3370 add_asflags $_flags $_cflags
3371 set_ccvars AS
3372
3373 probe_cc objcc "$objcc"
3374 objcflags_filter=$_flags_filter
3375 add_objcflags $_flags $_cflags
3376 set_ccvars OBJC
3377
3378 probe_cc ld "$ld"
3379 ldflags_filter=$_flags_filter
3380 add_ldflags $_flags $_ldflags
3381 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3382 LD_O=${_ld_o-$LD_O}
3383 LD_LIB=${_ld_lib-$LD_LIB}
3384 LD_PATH=${_ld_path-$LD_PATH}
3385
3386 probe_cc hostld "$host_ld"
3387 host_ldflags_filter=$_flags_filter
3388 add_host_ldflags $_flags $_ldflags
3389 HOSTLD_O=${_ld_o-$HOSTLD_O}
3390
3391 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3392     probe_cc depcc "$dep_cc"
3393     CCDEP=${_DEPCMD:-$DEPCMD}
3394     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3395     DEPCCFLAGS=$_flags
3396 fi
3397
3398 if $ar 2>&1 | grep -q Microsoft; then
3399     arflags="-nologo"
3400     ar_o='-out:$@'
3401 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3402     arflags="rq"
3403     ar_o='$@'
3404 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3405     arflags='-Xany -r -c'
3406     ar_o='$@'
3407 else
3408     arflags="rc"
3409     ar_o='$@'
3410 fi
3411
3412 add_cflags $extra_cflags
3413 add_objcflags $extra_objcflags
3414 add_asflags $extra_cflags
3415
3416 if test -n "$sysroot"; then
3417     case "$cc_type" in
3418         gcc|llvm_gcc|clang)
3419             add_cppflags --sysroot="$sysroot"
3420             add_ldflags --sysroot="$sysroot"
3421         ;;
3422         tms470)
3423             add_cppflags -I"$sysinclude"
3424             add_ldflags  --sysroot="$sysroot"
3425         ;;
3426     esac
3427 fi
3428
3429 if test "$cpu" = host; then
3430     enabled cross_compile &&
3431         die "--cpu=host makes no sense when cross-compiling."
3432
3433     case "$cc_type" in
3434         gcc|llvm_gcc)
3435             check_native(){
3436                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3437                 sed -n "/cc1.*$1=/{
3438                             s/.*$1=\\([^ ]*\\).*/\\1/
3439                             p
3440                             q
3441                         }" $TMPE
3442             }
3443             cpu=$(check_native -march || check_native -mcpu)
3444         ;;
3445     esac
3446
3447     test "${cpu:-host}" = host &&
3448         die "--cpu=host not supported with compiler $cc"
3449 fi
3450
3451 # Deal with common $arch aliases
3452 case "$arch" in
3453     aarch64|arm64)
3454         arch="aarch64"
3455     ;;
3456     arm*)
3457         arch="arm"
3458     ;;
3459     mips*|IP*)
3460         case "$arch" in
3461         *el)
3462             add_cppflags -EL
3463             add_ldflags -EL
3464         ;;
3465         *eb)
3466             add_cppflags -EB
3467             add_ldflags -EB
3468         ;;
3469         esac
3470         arch="mips"
3471     ;;
3472     parisc*|hppa*)
3473         arch="parisc"
3474     ;;
3475     "Power Macintosh"|ppc*|powerpc*)
3476         arch="ppc"
3477     ;;
3478     s390|s390x)
3479         arch="s390"
3480     ;;
3481     sh4|sh)
3482         arch="sh4"
3483     ;;
3484     sun4u|sparc*)
3485         arch="sparc"
3486     ;;
3487     tilegx|tile-gx)
3488         arch="tilegx"
3489     ;;
3490     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3491         arch="x86"
3492     ;;
3493 esac
3494
3495 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3496 enable $arch
3497
3498 # Add processor-specific flags
3499 if enabled aarch64; then
3500
3501     case $cpu in
3502         armv*)
3503             cpuflags="-march=$cpu"
3504         ;;
3505         *)
3506             cpuflags="-mcpu=$cpu"
3507         ;;
3508     esac
3509
3510 elif enabled alpha; then
3511
3512     cpuflags="-mcpu=$cpu"
3513
3514 elif enabled arm; then
3515
3516     check_arm_arch() {
3517         check_cpp_condition stddef.h \
3518             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3519             $cpuflags
3520     }
3521
3522     probe_arm_arch() {
3523         if   check_arm_arch 4;        then echo armv4
3524         elif check_arm_arch 4T;       then echo armv4t
3525         elif check_arm_arch 5;        then echo armv5
3526         elif check_arm_arch 5E;       then echo armv5e
3527         elif check_arm_arch 5T;       then echo armv5t
3528         elif check_arm_arch 5TE;      then echo armv5te
3529         elif check_arm_arch 5TEJ;     then echo armv5te
3530         elif check_arm_arch 6;        then echo armv6
3531         elif check_arm_arch 6J;       then echo armv6j
3532         elif check_arm_arch 6K;       then echo armv6k
3533         elif check_arm_arch 6Z;       then echo armv6z
3534         elif check_arm_arch 6ZK;      then echo armv6zk
3535         elif check_arm_arch 6T2;      then echo armv6t2
3536         elif check_arm_arch 7;        then echo armv7
3537         elif check_arm_arch 7A  7_A;  then echo armv7-a
3538         elif check_arm_arch 7S;       then echo armv7-a
3539         elif check_arm_arch 7R  7_R;  then echo armv7-r
3540         elif check_arm_arch 7M  7_M;  then echo armv7-m
3541         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3542         elif check_arm_arch 8A  8_A;  then echo armv8-a
3543         fi
3544     }
3545
3546     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3547
3548     case $cpu in
3549         armv*)
3550             cpuflags="-march=$cpu"
3551             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3552         ;;
3553         *)
3554             cpuflags="-mcpu=$cpu"
3555             case $cpu in
3556                 cortex-a*)                               subarch=armv7a  ;;
3557                 cortex-r*)                               subarch=armv7r  ;;
3558                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3559                 arm11*)                                  subarch=armv6   ;;
3560                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3561                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3562                 *)                             subarch=$(probe_arm_arch) ;;
3563             esac
3564         ;;
3565     esac
3566
3567     case "$subarch" in
3568         armv5t*)    enable fast_clz                ;;
3569         armv[6-8]*) enable fast_clz fast_unaligned ;;
3570     esac
3571
3572 elif enabled avr32; then
3573
3574     case $cpu in
3575         ap7[02]0[0-2])
3576             subarch="avr32_ap"
3577             cpuflags="-mpart=$cpu"
3578         ;;
3579         ap)
3580             subarch="avr32_ap"
3581             cpuflags="-march=$cpu"
3582         ;;
3583         uc3[ab]*)
3584             subarch="avr32_uc"
3585             cpuflags="-mcpu=$cpu"
3586         ;;
3587         uc)
3588             subarch="avr32_uc"
3589             cpuflags="-march=$cpu"
3590         ;;
3591     esac
3592
3593 elif enabled bfin; then
3594
3595     cpuflags="-mcpu=$cpu"
3596
3597 elif enabled mips; then
3598
3599     cpuflags="-march=$cpu"
3600
3601 elif enabled ppc; then
3602
3603     disable ldbrx
3604
3605     case $(tolower $cpu) in
3606         601|ppc601|powerpc601)
3607             cpuflags="-mcpu=601"
3608             disable altivec
3609         ;;
3610         603*|ppc603*|powerpc603*)
3611             cpuflags="-mcpu=603"
3612             disable altivec
3613         ;;
3614         604*|ppc604*|powerpc604*)
3615             cpuflags="-mcpu=604"
3616             disable altivec
3617         ;;
3618         g3|75*|ppc75*|powerpc75*)
3619             cpuflags="-mcpu=750"
3620             disable altivec
3621         ;;
3622         g4|745*|ppc745*|powerpc745*)
3623             cpuflags="-mcpu=7450"
3624             disable vsx
3625         ;;
3626         74*|ppc74*|powerpc74*)
3627             cpuflags="-mcpu=7400"
3628             disable vsx
3629         ;;
3630         g5|970|ppc970|powerpc970)
3631             cpuflags="-mcpu=970"
3632             disable vsx
3633         ;;
3634         power[3-6]*)
3635             cpuflags="-mcpu=$cpu"
3636             disable vsx
3637         ;;
3638         power[7-8]*)
3639             cpuflags="-mcpu=$cpu"
3640             enable ldbrx
3641         ;;
3642         cell)
3643             cpuflags="-mcpu=cell"
3644             enable ldbrx
3645             disable vsx
3646         ;;
3647         e500mc)
3648             cpuflags="-mcpu=e500mc"
3649             disable altivec
3650         ;;
3651         e500v2)
3652             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3653             disable altivec
3654             disable dcbzl
3655         ;;
3656         e500)
3657             cpuflags="-mcpu=8540 -mhard-float"
3658             disable altivec
3659             disable dcbzl
3660         ;;
3661     esac
3662
3663 elif enabled sparc; then
3664
3665     case $cpu in
3666         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3667             cpuflags="-mcpu=$cpu"
3668         ;;
3669         ultrasparc*|niagara[234])
3670             cpuflags="-mcpu=$cpu"
3671         ;;
3672     esac
3673
3674 elif enabled x86; then
3675
3676     case $cpu in
3677         i[345]86|pentium)
3678             cpuflags="-march=$cpu"
3679             disable i686
3680             disable mmx
3681         ;;
3682         # targets that do NOT support nopl and conditional mov (cmov)
3683         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3684             cpuflags="-march=$cpu"
3685             disable i686
3686         ;;
3687         # targets that do support nopl and conditional mov (cmov)
3688         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3689             cpuflags="-march=$cpu"
3690             enable i686
3691             enable fast_cmov
3692         ;;
3693         # targets that do support conditional mov but on which it's slow
3694         pentium4|pentium4m|prescott|nocona)
3695             cpuflags="-march=$cpu"
3696             enable i686
3697             disable fast_cmov
3698         ;;
3699     esac
3700
3701 fi
3702
3703 if [ "$cpu" != generic ]; then
3704     add_cflags  $cpuflags
3705     add_asflags $cpuflags
3706     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3707 fi
3708
3709 # compiler sanity check
3710 check_exec <<EOF
3711 int main(void){ return 0; }
3712 EOF
3713 if test "$?" != 0; then
3714     echo "$cc is unable to create an executable file."
3715     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3716         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3717         echo "Only do this if you know what cross compiling means."
3718     fi
3719     die "C compiler test failed."
3720 fi
3721
3722 add_cppflags -D_ISOC99_SOURCE
3723
3724 # some compilers silently accept -std=c11, so we also need to check that the
3725 # version macro is defined properly
3726 if test_cflags_cpp -std=c11 "__STDC_VERSION__ >= 201112L"; then
3727     add_cflags -std=c11
3728 else
3729     check_cflags -std=c99
3730 fi
3731
3732 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3733 #include <stdlib.h>
3734 EOF
3735 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3736 #include <stdlib.h>
3737 EOF
3738
3739 add_host_cppflags -D_ISOC99_SOURCE
3740 check_host_cflags -std=c99
3741 check_host_cflags -Wall
3742 check_host_cflags -O3
3743
3744 check_64bit(){
3745     arch32=$1
3746     arch64=$2
3747     expr=$3
3748     check_code cc "" "int test[2*($expr) - 1]" &&
3749         subarch=$arch64 || subarch=$arch32
3750 }
3751
3752 case "$arch" in
3753     aarch64|alpha|ia64)
3754         spic=$shared
3755     ;;
3756     mips)
3757         check_64bit mips mips64 '_MIPS_SIM > 1'
3758         spic=$shared
3759     ;;
3760     parisc)
3761         check_64bit parisc parisc64 'sizeof(void *) > 4'
3762         spic=$shared
3763     ;;
3764     ppc)
3765         check_64bit ppc ppc64 'sizeof(void *) > 4'
3766         spic=$shared
3767     ;;
3768     s390)
3769         check_64bit s390 s390x 'sizeof(void *) > 4'
3770         spic=$shared
3771     ;;
3772     sparc)
3773         check_64bit sparc sparc64 'sizeof(void *) > 4'
3774         spic=$shared
3775     ;;
3776     x86)
3777         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3778         if test "$subarch" = "x86_64"; then
3779             spic=$shared
3780         fi
3781     ;;
3782 esac
3783
3784 enable $subarch
3785 enabled spic && enable_weak pic
3786
3787 # OS specific
3788 case $target_os in
3789     aix)
3790         SHFLAGS=-shared
3791         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3792         enabled shared && add_ldflags -Wl,-brtl
3793         ;;
3794     android)
3795         disable symver
3796         enable section_data_rel_ro
3797         SLIB_INSTALL_NAME='$(SLIBNAME)'
3798         SLIB_INSTALL_LINKS=
3799         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3800         ;;
3801     haiku)
3802         prefix_default="/boot/common"
3803         network_extralibs="-lnetwork"
3804         host_libs=
3805         ;;
3806     sunos)
3807         SHFLAGS='-shared -Wl,-h,$$(@F)'
3808         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3809         network_extralibs="-lsocket -lnsl"
3810         # When using suncc to build, the Solaris linker will mark
3811         # an executable with each instruction set encountered by
3812         # the Solaris assembler.  As our libraries contain their own
3813         # guards for processor-specific code, instead suppress
3814         # generation of the HWCAPS ELF section on Solaris x86 only.
3815         enabled_all suncc x86 &&
3816             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3817             add_ldflags -Wl,-M,mapfile
3818         nm_default='nm -P -g'
3819         version_script='-M'
3820         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3821         ;;
3822     netbsd)
3823         disable symver
3824         oss_indev_extralibs="-lossaudio"
3825         oss_outdev_extralibs="-lossaudio"
3826         ;;
3827     openbsd|bitrig)
3828         disable symver
3829         SHFLAGS='-shared'
3830         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3831         SLIB_INSTALL_LINKS=
3832         oss_indev_extralibs="-lossaudio"
3833         oss_outdev_extralibs="-lossaudio"
3834         ;;
3835     dragonfly)
3836         disable symver
3837         ;;
3838     freebsd)
3839         ;;
3840     bsd/os)
3841         add_extralibs -lpoll -lgnugetopt
3842         ;;
3843     darwin)
3844         enabled ppc && add_asflags -force_cpusubtype_ALL
3845         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3846         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3847         add_ldflags -Wl,-dynamic,-search_paths_first
3848         SLIBSUF=".dylib"
3849         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3850         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3851         objformat="macho"
3852         enabled x86_64 && objformat="macho64"
3853         enabled_any pic shared ||
3854             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3855         check_header dispatch/dispatch.h &&
3856             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3857         ;;
3858     msys*)
3859         die "Native MSYS builds are discouraged, please use the MINGW environment."
3860         ;;
3861     mingw32*|mingw64*)
3862         if test $target_os = "mingw32ce"; then
3863             disable network
3864         else
3865             target_os=mingw32
3866         fi
3867         LIBTARGET=i386
3868         if enabled x86_64; then
3869             LIBTARGET="i386:x86-64"
3870         elif enabled arm; then
3871             LIBTARGET=arm-wince
3872         fi
3873         check_ldflags -Wl,--nxcompat
3874         check_ldflags -Wl,--dynamicbase
3875         shlibdir_default="$bindir_default"
3876         SLIBPREF=""
3877         SLIBSUF=".dll"
3878         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3879         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3880         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3881         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3882         SLIB_INSTALL_LINKS=
3883         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3884         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3885         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3886         objformat="win32"
3887         dlltool="${cross_prefix}dlltool"
3888         ranlib=:
3889         enable dos_paths
3890         ;;
3891     win32|win64)
3892         disable symver
3893         if enabled shared; then
3894             # Link to the import library instead of the normal static library
3895             # for shared libs.
3896             LD_LIB='%.lib'
3897             # Cannot build both shared and static libs with MSVC or icl.
3898             disable static
3899         fi
3900         shlibdir_default="$bindir_default"
3901         SLIBPREF=""
3902         SLIBSUF=".dll"
3903         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3904         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3905         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3906         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3907         SLIB_INSTALL_LINKS=
3908         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3909         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3910         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3911         objformat="win32"
3912         ranlib=:
3913         enable dos_paths
3914         ;;
3915     cygwin*)
3916         target_os=cygwin
3917         shlibdir_default="$bindir_default"
3918         SLIBPREF="cyg"
3919         SLIBSUF=".dll"
3920         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3921         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3922         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3923         SLIB_INSTALL_LINKS=
3924         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3925         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3926         objformat="win32"
3927         enable dos_paths
3928         ;;
3929     *-dos|freedos|opendos)
3930         network_extralibs="-lsocket"
3931         objformat="coff"
3932         enable dos_paths
3933         add_cppflags -U__STRICT_ANSI__
3934         ;;
3935     linux)
3936         enable dv1394
3937         enable section_data_rel_ro
3938         ;;
3939     irix*)
3940         target_os=irix
3941         ranlib="echo ignoring ranlib"
3942         ;;
3943     os/2*)
3944         ln_s="cp -f"
3945         objformat="aout"
3946         add_cppflags -D_GNU_SOURCE
3947         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zmap
3948         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3949         LIBSUF="_s.a"
3950         SLIBPREF=""
3951         SLIBSUF=".dll"
3952         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3953         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3954         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3955             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3956             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3957             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3958             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3959         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3960             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3961         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3962         enable dos_paths
3963         ;;
3964     gnu/kfreebsd)
3965         add_cppflags -D_BSD_SOURCE
3966         ;;
3967     gnu)
3968         ;;
3969     qnx)
3970         add_cppflags -D_QNX_SOURCE
3971         network_extralibs="-lsocket"
3972         ;;
3973     symbian)
3974         SLIBSUF=".dll"
3975         enable dos_paths
3976         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
3977         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
3978         add_ldflags -Wl,--target1-abs,--no-undefined \
3979                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
3980                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
3981         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
3982                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
3983                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
3984         ;;
3985     osf1)
3986         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
3987         ;;
3988     minix)
3989         ;;
3990     none)
3991         ;;
3992     *)
3993         die "Unknown OS '$target_os'."
3994         ;;
3995 esac
3996
3997 # determine libc flavour
3998
3999 probe_libc(){
4000     pfx=$1
4001     pfx_no_=${pfx%_}
4002     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4003     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4004         eval ${pfx}libc_type=uclibc
4005         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4006     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4007         eval ${pfx}libc_type=glibc
4008         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4009     # MinGW headers can be installed on Cygwin, so check for newlib first.
4010     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4011         eval ${pfx}libc_type=newlib
4012         add_${pfx}cppflags -U__STRICT_ANSI__
4013     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4014     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4015         eval ${pfx}libc_type=mingw64
4016         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4017         eval test \$${pfx_no_}cc_type = "gcc" &&
4018             add_${pfx}cppflags -D__printf__=__gnu_printf__
4019     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4020          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4021         eval ${pfx}libc_type=mingw32
4022         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4023             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4024             die "ERROR: MinGW32 runtime version must be >= 3.15."
4025         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4026         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4027             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4028         eval test \$${pfx_no_}cc_type = "gcc" &&
4029             add_${pfx}cppflags -D__printf__=__gnu_printf__
4030     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4031         eval ${pfx}libc_type=msvcrt
4032         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4033             if [ "$pfx" = host_ ]; then
4034                 add_host_cppflags -Dsnprintf=_snprintf
4035             else
4036                 add_compat strtod.o strtod=avpriv_strtod
4037                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4038                                              _snprintf=avpriv_snprintf  \
4039                                              vsnprintf=avpriv_vsnprintf
4040             fi
4041         fi
4042         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4043         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4044         # 0x601 by default unless something else is set by the user.
4045         # This can easily lead to us detecting functions only present
4046         # in such new versions and producing binaries requiring windows 7.0.
4047         # Therefore explicitly set the default to XP unless the user has
4048         # set something else on the command line.
4049         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4050         # family. For these cases, configure is free to use any functions
4051         # found in the SDK headers by default. (Alternatively, we could force
4052         # _WIN32_WINNT to 0x0602 in that case.)
4053         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4054             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4055 #ifdef WINAPI_FAMILY
4056 #include <winapifamily.h>
4057 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4058 #error not desktop
4059 #endif
4060 #endif
4061 EOF
4062         if [ "$pfx" = "" ]; then
4063             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4064         fi
4065     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4066         eval ${pfx}libc_type=klibc
4067     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4068         eval ${pfx}libc_type=bionic
4069     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4070         eval ${pfx}libc_type=solaris
4071         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4072     else
4073         eval ${pfx}libc_type=default
4074         add_${pfx}cppflags -D_DEFAULT_SOURCE
4075     fi
4076 }
4077
4078 probe_libc
4079 test -n "$libc_type" && enable libc_$libc_type
4080 probe_libc host_
4081 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4082
4083 case $libc_type in
4084     bionic)
4085         add_compat strtod.o strtod=avpriv_strtod
4086         ;;
4087 esac
4088
4089 # hacks for compiler/libc/os combinations
4090
4091 if enabled_all tms470 libc_glibc; then
4092     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4093     add_cppflags -D__USER_LABEL_PREFIX__=
4094     add_cppflags -D__builtin_memset=memset
4095     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4096     add_cflags   -pds=48    # incompatible redefinition of macro
4097 fi
4098
4099 if enabled_all ccc libc_glibc; then
4100     add_ldflags -Wl,-z,now  # calls to libots crash without this
4101 fi
4102
4103 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4104     add_cppflags '-I\$(SRC_PATH)/compat/float'
4105
4106 esc(){
4107     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4108 }
4109
4110 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" >config.fate
4111
4112 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4113
4114 set_default $PATHS_LIST
4115 set_default nm
4116
4117 # we need to build at least one lib type
4118 if ! enabled_any static shared; then
4119     cat <<EOF
4120 At least one library type must be built.
4121 Specify --enable-static to build the static libraries or --enable-shared to
4122 build the shared libraries as well. To only build the shared libraries specify
4123 --disable-static in addition to --enable-shared.
4124 EOF
4125     exit 1
4126 fi
4127
4128 disabled optimizations || check_cflags -fomit-frame-pointer
4129
4130 enable_weak_pic() {
4131     disabled pic && return
4132     enable pic
4133     add_cppflags -DPIC
4134     case "$target_os" in
4135     mingw*|cygwin*)
4136         ;;
4137     *)
4138         add_cflags -fPIC
4139         ;;
4140     esac
4141     add_asflags  -fPIC
4142 }
4143
4144 enabled pic && enable_weak_pic
4145
4146 check_cc <<EOF || die "Symbol mangling check failed."
4147 int ff_extern;
4148 EOF
4149 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4150 extern_prefix=${sym%%ff_extern*}
4151
4152 check_cc <<EOF && enable_weak inline_asm
4153 void foo(void) { __asm__ volatile ("" ::); }
4154 EOF
4155
4156 _restrict=
4157 for restrict_keyword in restrict __restrict__ __restrict; do
4158     check_cc <<EOF && _restrict=$restrict_keyword && break
4159 void foo(char * $restrict_keyword p);
4160 EOF
4161 done
4162
4163 check_cc <<EOF && enable pragma_deprecated
4164 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4165 EOF
4166
4167 check_cc <<EOF && enable attribute_packed
4168 struct { int x; } __attribute__((packed)) x;
4169 EOF
4170
4171 check_cc <<EOF && enable attribute_may_alias
4172 union { int x; } __attribute__((may_alias)) x;
4173 EOF
4174
4175 check_cc <<EOF || die "endian test failed"
4176 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4177 EOF
4178 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4179
4180 check_gas() {
4181     log "check_gas using '$as' as AS"
4182     # :vararg is used on aarch64, arm and ppc altivec
4183     check_as <<EOF || return 1
4184 .macro m n, y:vararg=0
4185 \n: .int \y
4186 .endm
4187 m x
4188 EOF
4189     # .altmacro is only used in arm asm
4190     ! enabled arm || check_as <<EOF || return 1
4191 .altmacro
4192 EOF
4193     enable gnu_as
4194     return 0
4195 }
4196
4197 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4198     nogas=:
4199     enabled_any arm aarch64 && nogas=die
4200     enabled_all ppc altivec && nogas=warn
4201     as_noop=-v
4202
4203     case $as_type in
4204         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4205         gcc)  gaspp_as_type=gas ;;
4206         *)    gaspp_as_type=$as_type ;;
4207     esac
4208
4209     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4210
4211     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4212         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4213
4214     if ! check_gas ; then
4215         as=${gas:=$as}
4216         check_gas || \
4217             $nogas "GNU assembler not found, install/update gas-preprocessor"
4218     fi
4219
4220     check_as <<EOF && enable as_func
4221 .func test
4222 .endfunc
4223 EOF
4224 fi
4225
4226 check_inline_asm inline_asm_labels '"1:\n"'
4227
4228 if enabled aarch64; then
4229     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4230     # internal assembler in clang 3.3 does not support this instruction
4231     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4232     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4233
4234     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4235
4236 elif enabled alpha; then
4237
4238     check_cflags -mieee
4239
4240 elif enabled arm; then
4241
4242     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4243     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4244     enabled thumb && check_cflags -mthumb || check_cflags -marm
4245
4246     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4247         enable vfp_args
4248     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4249         enable vfp_args
4250     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4251         case "${cross_prefix:-$cc}" in
4252             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4253             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4254 __asm__ (".eabi_attribute 28, 1");
4255 int main(void) { return 0; }
4256 EOF
4257         esac
4258         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4259     fi
4260
4261     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4262     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4263     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4264     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4265     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4266     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4267
4268     [ $target_os = linux ] || [ $target_os = android ] ||
4269         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4270             $ARCH_EXT_LIST_ARM
4271
4272     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4273
4274     check_as <<EOF && enable as_dn_directive
4275 ra .dn d0.i16
4276 .unreq ra
4277 EOF
4278     check_as <<EOF && enable as_fpu_directive
4279 .fpu neon
4280 EOF
4281
4282     # llvm's integrated assembler supports .object_arch from llvm 3.5
4283     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4284 .object_arch armv4
4285 EOF
4286
4287     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4288
4289 elif enabled mips; then
4290
4291     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4292
4293     # make sure that only an instruction set is enabled
4294     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4295
4296     if enabled mips64; then
4297         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4298             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4299                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4300     else
4301         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4302             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4303                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4304     fi
4305
4306 elif enabled parisc; then
4307
4308     if enabled gcc; then
4309         case $($cc -dumpversion) in
4310             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4311         esac
4312     fi
4313
4314 elif enabled ppc; then
4315
4316     enable local_aligned_8 local_aligned_16 local_aligned_32
4317
4318     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4319     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4320     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4321     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4322
4323     # AltiVec flags: The FSF version of GCC differs from the Apple version
4324     if enabled altivec; then
4325         check_cflags -maltivec -mabi=altivec &&
4326         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4327         check_cflags -faltivec
4328
4329         # check if our compiler supports Motorola AltiVec C API
4330         check_cc <<EOF || disable altivec
4331 $inc_altivec_h
4332 int main(void) {
4333     vector signed int v1 = (vector signed int) { 0 };
4334     vector signed int v2 = (vector signed int) { 1 };
4335     v1 = vec_add(v1, v2);
4336     return 0;
4337 }
4338 EOF
4339
4340         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4341     fi
4342
4343     if enabled vsx; then
4344         check_cflags -mvsx &&
4345         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4346     fi
4347
4348     if enabled power8; then
4349         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4350     fi
4351
4352 elif enabled x86; then
4353
4354     check_builtin rdtsc    intrin.h   "__rdtsc()"
4355     check_builtin mm_empty mmintrin.h "_mm_empty()"
4356
4357     enable local_aligned_8 local_aligned_16 local_aligned_32
4358
4359     # check whether EBP is available on x86
4360     # As 'i' is stored on the stack, this program will crash
4361     # if the base pointer is used to access it because the
4362     # base pointer is cleared in the inline assembly code.
4363     check_exec_crash <<EOF && enable ebp_available
4364 volatile int i=0;
4365 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4366 return i;
4367 EOF
4368
4369     # check whether EBX is available on x86
4370     check_inline_asm ebx_available '""::"b"(0)' &&
4371         check_inline_asm ebx_available '"":::"%ebx"'
4372
4373     # check whether xmm clobbers are supported
4374     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4375
4376     # check whether binutils is new enough to compile SSSE3/MMXEXT
4377     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4378     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4379
4380     if ! disabled_any asm mmx yasm; then
4381         if check_cmd $yasmexe --version; then
4382             enabled x86_64 && yasm_extra="-m amd64"
4383             yasm_debug="-g dwarf2"
4384         elif check_cmd nasm -v; then
4385             yasmexe=nasm
4386             yasm_debug="-g -F dwarf"
4387             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4388         fi
4389
4390         YASMFLAGS="-f $objformat $yasm_extra"
4391         enabled pic               && append YASMFLAGS "-DPIC"
4392         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4393         case "$objformat" in
4394             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4395         esac
4396
4397         check_yasm "movbe ecx, [5]" && enable yasm ||
4398             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4399         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4400         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4401         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4402         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4403         check_yasm "CPU amdnop" || disable cpunop
4404     fi
4405
4406     case "$cpu" in
4407         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4408             disable fast_clz
4409         ;;
4410     esac
4411
4412 fi
4413
4414 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4415
4416 check_ldflags -Wl,--as-needed
4417
4418 if check_func dlopen; then
4419     ldl=
4420 elif check_func dlopen -ldl; then
4421     ldl=-ldl
4422 fi
4423
4424 if ! disabled network; then
4425     check_func getaddrinfo $network_extralibs
4426     check_func inet_aton $network_extralibs
4427
4428     check_type netdb.h "struct addrinfo"
4429     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4430     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4431     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4432     check_type poll.h "struct pollfd"
4433     check_type netinet/sctp.h "struct sctp_event_subscribe"
4434     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4435     check_type netinet/in.h "struct sockaddr_in6"
4436     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4437     check_type "sys/types.h sys/socket.h" socklen_t
4438
4439     # Prefer arpa/inet.h over winsock2
4440     if check_header arpa/inet.h ; then
4441         check_func closesocket
4442     elif check_header winsock2.h ; then
4443         check_func_headers winsock2.h closesocket -lws2 &&
4444             network_extralibs="-lws2" ||
4445         { check_func_headers winsock2.h closesocket -lws2_32 &&
4446             network_extralibs="-lws2_32"; } || disable winsock2_h network
4447         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4448
4449         check_type ws2tcpip.h socklen_t
4450         check_type ws2tcpip.h "struct addrinfo"
4451         check_type ws2tcpip.h "struct group_source_req"
4452         check_type ws2tcpip.h "struct ip_mreq_source"
4453         check_type ws2tcpip.h "struct ipv6_mreq"
4454         check_type winsock2.h "struct pollfd"
4455         check_struct winsock2.h "struct sockaddr" sa_len
4456         check_type ws2tcpip.h "struct sockaddr_in6"
4457         check_type ws2tcpip.h "struct sockaddr_storage"
4458     else
4459         disable network
4460     fi
4461 fi
4462
4463 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4464 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4465 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4466 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4467
4468 case "$custom_allocator" in
4469     jemalloc)
4470         # jemalloc by default does not use a prefix
4471         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4472     ;;
4473     tcmalloc)
4474         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4475         malloc_prefix=tc_
4476     ;;
4477 esac
4478
4479 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4480 check_func  ${malloc_prefix}memalign            && enable memalign
4481 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4482
4483 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4484     check_func_headers time.h clock_gettime ||
4485         { check_lib time.h clock_gettime -lrt && LIBRT="-lrt"; }
4486
4487 check_func  fcntl
4488 check_func  fork
4489 check_func  gethrtime
4490 check_func  getopt
4491 check_func  getrusage
4492 check_func  gettimeofday
4493 check_func  gmtime_r
4494 check_func  isatty
4495 check_func  localtime_r
4496 check_func  mach_absolute_time
4497 check_func  mkstemp
4498 check_func  mmap
4499 check_func  mprotect
4500 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4501 check_func_headers time.h nanosleep || { check_func_headers time.h nanosleep -lrt && add_extralibs -lrt; }
4502 check_func  sched_getaffinity
4503 check_func  setrlimit
4504 check_func  strerror_r
4505 check_func  sysconf
4506 check_func  sysctl
4507 check_func  usleep
4508
4509 check_func_headers io.h setmode
4510 check_func_headers stdlib.h getenv
4511
4512 check_func_headers windows.h CoTaskMemFree -lole32
4513 check_func_headers windows.h GetProcessAffinityMask
4514 check_func_headers windows.h GetProcessTimes
4515 check_func_headers windows.h GetSystemTimeAsFileTime
4516 check_func_headers windows.h LoadLibrary
4517 check_func_headers windows.h MapViewOfFile
4518 check_func_headers windows.h SetConsoleTextAttribute
4519 check_func_headers windows.h Sleep
4520 check_func_headers windows.h VirtualAlloc
4521 check_struct windows.h "CONDITION_VARIABLE" Ptr
4522
4523 check_header direct.h
4524 check_header dlfcn.h
4525 check_header d3d11.h
4526 check_header dxva.h
4527 check_header dxva2api.h
4528 check_header io.h
4529 check_header mach/mach_time.h
4530 check_header malloc.h
4531 check_header poll.h
4532 check_header sys/mman.h
4533 check_header sys/param.h
4534 check_header sys/resource.h
4535 check_header sys/select.h
4536 check_header sys/time.h
4537 check_header sys/un.h
4538 check_header unistd.h
4539 check_header valgrind/valgrind.h
4540 check_header vdpau/vdpau.h
4541 check_header vdpau/vdpau_x11.h
4542 check_header VideoDecodeAcceleration/VDADecoder.h
4543 check_header windows.h
4544 check_header X11/extensions/XvMClib.h
4545
4546 # it seems there are versions of clang in some distros that try to use the
4547 # gcc headers, which explodes for stdatomic
4548 # so we also check that atomics actually work here
4549 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4550
4551 check_lib "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4552 check_lib "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4553 check_lib "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4554
4555 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4556
4557 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4558 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4559 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4560
4561 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4562 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4563 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4564 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4565 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4566
4567 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4568
4569 if ! disabled w32threads && ! enabled pthreads; then
4570     check_func_headers "windows.h process.h" _beginthreadex &&
4571         enable w32threads || disable w32threads
4572 fi
4573
4574 # check for some common methods of building with pthread support
4575 # do this before the optional library checks as some of them require pthreads
4576 if ! disabled pthreads && ! enabled w32threads; then
4577     enable pthreads
4578     if check_func pthread_join -pthread; then
4579         add_cflags -pthread
4580         add_extralibs -pthread
4581     elif check_func pthread_join -pthreads; then
4582         add_cflags -pthreads
4583         add_extralibs -pthreads
4584     elif check_func pthread_join -lpthreadGC2; then
4585         add_extralibs -lpthreadGC2
4586     elif check_lib pthread.h pthread_join -lpthread; then
4587         :
4588     elif ! check_func pthread_join; then
4589         disable pthreads
4590     fi
4591 fi
4592
4593 enabled pthreads &&
4594     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4595
4596 disabled  zlib || check_lib  zlib.h      zlibVersion -lz   || disable  zlib
4597 disabled bzlib || check_lib bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
4598
4599 check_lib math.h sin -lm && LIBM="-lm"
4600
4601 atan2f_args=2
4602 ldexpf_args=2
4603 powf_args=2
4604
4605 for func in $MATH_FUNCS; do
4606     eval check_mathfunc $func \${${func}_args:-1} $LIBM
4607 done
4608
4609 # these are off by default, so fail if requested and not available
4610 enabled avisynth          && { check_lib "avisynth/avisynth_c.h windows.h" LoadLibrary ||
4611                                check_lib "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl   ||
4612                                die "ERROR: LoadLibrary/dlopen not found, or avisynth header not found"; }
4613 enabled cuda              && check_lib cuda.h cuInit -lcuda
4614 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4615 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4616 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4617 enabled libdc1394         && require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new
4618 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4619 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4620 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4621 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4622 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4623 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4624                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
4625                                done || die "ERROR: libgsm not found"; }
4626 enabled libhdcd           && require_pkg_config libhdcd "hdcd/hdcd_simple.h" hdcd_new
4627 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4628 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4629 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4630 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4631 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4632 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4633 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4634 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4635 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4636 enabled libopenjpeg       && { check_lib openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4637                                require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4638 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4639 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4640 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4641 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4642 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4643 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4644 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4645 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4646 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4647 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4648 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4649 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4650     enabled libvpx_vp8_decoder && {
4651         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4652             disable libvpx_vp8_decoder;
4653     }
4654     enabled libvpx_vp8_encoder && {
4655         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4656             disable libvpx_vp8_encoder;
4657     }
4658     enabled libvpx_vp9_decoder && {
4659         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4660             disable libvpx_vp9_decoder;
4661     }
4662     enabled libvpx_vp9_encoder && {
4663         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4664             disable libvpx_vp9_encoder;
4665     }
4666     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4667         die "libvpx enabled but no supported decoders found"
4668     fi
4669 }
4670 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4671 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4672 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4673                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4674                                die "ERROR: libx264 version must be >= 0.118."; } &&
4675                              { check_cpp_condition x264.h "X264_MPEG2" &&
4676                                enable libx262; }
4677 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4678                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4679                                die "ERROR: libx265 version must be >= 57."; }
4680 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4681 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4682 enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4683                                { ! enabled cross_compile &&
4684                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4685                                  add_ldflags -L/opt/vc/lib/ &&
4686                                  check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4687                                die "ERROR: mmal not found" &&
4688                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4689 enabled omx_rpi && enable omx
4690 enabled omx               && { check_header OMX_Core.h ||
4691                                 { ! enabled cross_compile && enabled omx_rpi && {
4692                                     add_cflags -isystem/opt/vc/include/IL ; }
4693                                 check_header OMX_Core.h ; } ||
4694                                die "ERROR: OpenMAX IL headers not found"; }
4695 enabled openssl           && { { check_pkg_config openssl openssl/ssl.h OPENSSL_init_ssl ||
4696                                  check_pkg_config openssl openssl/ssl.h SSL_library_init; } && {
4697                                add_cflags $openssl_cflags && add_extralibs $openssl_libs; }||
4698                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4699                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4700                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4701                                die "ERROR: openssl not found"; }
4702
4703 enabled gnutls            && check_lib gmp.h mpz_export -lgmp && enable gmp
4704
4705 if enabled nvenc; then
4706     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4707     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6" ||
4708         die "ERROR: NVENC API version 5 or older is not supported"
4709 fi
4710
4711 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4712     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4713     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4714     enable sdl
4715 fi
4716
4717 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4718 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4719
4720 check_header linux/fb.h
4721 check_header linux/videodev2.h
4722 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4723
4724 check_header AVFoundation/AVFoundation.h &&
4725     check_objcflags -fobjc-arc &&
4726     add_extralibs -framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia ||
4727     disable AVFoundation_AVFoundation_h
4728
4729 check_header sys/videoio.h
4730
4731 check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"
4732 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4733 # w32api 3.12 had it defined wrong
4734 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4735
4736 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4737 { check_header dev/bktr/ioctl_meteor.h &&
4738   check_header dev/bktr/ioctl_bt848.h; } ||
4739 { check_header machine/ioctl_meteor.h &&
4740   check_header machine/ioctl_bt848.h; } ||
4741 { check_header dev/video/meteor/ioctl_meteor.h &&
4742   check_header dev/video/bktr/ioctl_bt848.h; } ||
4743 check_header dev/ic/bt8xx.h
4744
4745 check_header sndio.h
4746 check_header sys/soundcard.h
4747 check_header soundcard.h
4748
4749 enabled_any alsa_indev alsa_outdev &&
4750     check_lib alsa/asoundlib.h snd_pcm_htimestamp -lasound
4751
4752 enabled jack_indev && check_lib jack/jack.h jack_client_open -ljack &&
4753     check_func jack_port_get_latency_range -ljack
4754
4755 enabled_any sndio_indev sndio_outdev && check_lib sndio.h sio_open -lsndio
4756
4757 if enabled libcdio; then
4758     check_lib "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4759     check_lib "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4760     die "ERROR: No usable libcdio/cdparanoia found"
4761 fi
4762
4763 if enabled libxcb; then
4764     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4765         enabled libxcb && die "ERROR: libxcb not found";
4766     } && enable libxcb
4767
4768     disabled libxcb_shm ||
4769         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4770             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4771         } && check_header sys/shm.h && enable libxcb_shm
4772
4773     disabled libxcb_xfixes ||
4774         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4775             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4776         } && enable libxcb_xfixes
4777
4778     add_cflags "$xcb_shape_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4779     add_extralibs "$xcb_shape_libs $xcb_shm_libs $xcb_xfixes_libs"
4780 fi
4781
4782 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4783
4784 enabled vaapi &&
4785     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4786     disable vaapi
4787
4788 enabled vaapi &&
4789     check_lib "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm &&
4790     enable vaapi_drm
4791
4792 enabled vaapi &&
4793     check_lib "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11 &&
4794     enable vaapi_x11
4795
4796 enabled vdpau &&
4797     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4798     disable vdpau
4799
4800 enabled vdpau &&
4801     check_lib "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11 &&
4802     enable vdpau_x11
4803
4804 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4805
4806 # add some useful compiler flags if supported
4807 check_cflags -Wdeclaration-after-statement
4808 check_cflags -Wall
4809 check_cflags -Wdisabled-optimization
4810 check_cflags -Wpointer-arith
4811 check_cflags -Wredundant-decls
4812 check_cflags -Wwrite-strings
4813 check_cflags -Wtype-limits
4814 check_cflags -Wundef
4815 check_cflags -Wmissing-prototypes
4816 check_cflags -Wstrict-prototypes
4817
4818 if enabled extra_warnings; then
4819     check_cflags -Wcast-qual
4820     check_cflags -Wextra
4821     check_cflags -Wpedantic
4822 fi
4823
4824 check_disable_warning(){
4825     warning_flag=-W${1#-Wno-}
4826     test_cflags $warning_flag && add_cflags $1
4827 }
4828
4829 check_disable_warning -Wno-parentheses
4830 check_disable_warning -Wno-switch
4831 check_disable_warning -Wno-format-zero-length
4832 check_disable_warning -Wno-pointer-sign
4833
4834 check_disable_warning_headers(){
4835     warning_flag=-W${1#-Wno-}
4836     test_cflags $warning_flag && append cflags_headers $1
4837 }
4838
4839 check_disable_warning_headers -Wno-deprecated-declarations
4840 check_disable_warning_headers -Wno-unused-variable
4841
4842 # add some linker flags
4843 check_ldflags -Wl,--warn-common
4844 check_ldflags -Wl,-rpath-link=libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil:libavresample
4845 enabled rpath && add_ldexeflags -Wl,-rpath,$libdir
4846 test_ldflags -Wl,-Bsymbolic &&