configure: Do not treat JACK as a system library
[libav.git] / configure
1 #!/bin/sh
2 #
3 # Libav configure script
4 #
5 # Copyright (c) 2000-2002 Fabrice Bellard
6 # Copyright (c) 2005-2008 Diego Biurrun
7 # Copyright (c) 2005-2008 Mans Rullgard
8 #
9
10 # Prevent locale nonsense from breaking basic text processing.
11 LC_ALL=C
12 export LC_ALL
13
14 # make sure we are running under a compatible shell
15 # try to make this part work with most shells
16
17 try_exec(){
18     echo "Trying shell $1"
19     type "$1" > /dev/null 2>&1 && exec "$@"
20 }
21
22 unset foo
23 (: ${foo%%bar}) 2> /dev/null
24 E1="$?"
25
26 (: ${foo?}) 2> /dev/null
27 E2="$?"
28
29 if test "$E1" != 0 || test "$E2" = 0; then
30     echo "Broken shell detected.  Trying alternatives."
31     export FF_CONF_EXEC
32     if test "0$FF_CONF_EXEC" -lt 1; then
33         FF_CONF_EXEC=1
34         try_exec bash "$0" "$@"
35     fi
36     if test "0$FF_CONF_EXEC" -lt 2; then
37         FF_CONF_EXEC=2
38         try_exec ksh "$0" "$@"
39     fi
40     if test "0$FF_CONF_EXEC" -lt 3; then
41         FF_CONF_EXEC=3
42         try_exec /usr/xpg4/bin/sh "$0" "$@"
43     fi
44     echo "No compatible shell script interpreter found."
45     echo "This configure script requires a POSIX-compatible shell"
46     echo "such as bash or ksh."
47     echo "THIS IS NOT A BUG IN LIBAV, DO NOT REPORT IT AS SUCH."
48     echo "Instead, install a working POSIX-compatible shell."
49     echo "Disabling this configure test will create a broken Libav."
50     if test "$BASH_VERSION" = '2.04.0(1)-release'; then
51         echo "This bash version ($BASH_VERSION) is broken on your platform."
52         echo "Upgrade to a later version if available."
53     fi
54     exit 1
55 fi
56
57 test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
58
59 show_help(){
60     cat <<EOF
61 Usage: configure [options]
62 Options: [defaults in brackets after descriptions]
63
64 Help options:
65   --help                   print this message
66   --quiet                  Suppress showing informative output
67   --list-decoders          show all available decoders
68   --list-encoders          show all available encoders
69   --list-hwaccels          show all available hardware accelerators
70   --list-demuxers          show all available demuxers
71   --list-muxers            show all available muxers
72   --list-parsers           show all available parsers
73   --list-protocols         show all available protocols
74   --list-bsfs              show all available bitstream filters
75   --list-indevs            show all available input devices
76   --list-outdevs           show all available output devices
77   --list-filters           show all available filters
78
79 Standard options:
80   --logfile=FILE           log tests and output to FILE [avbuild/config.log]
81   --disable-logging        do not log configure debug information
82   --prefix=PREFIX          install in PREFIX [$prefix_default]
83   --bindir=DIR             install binaries in DIR [PREFIX/bin]
84   --datadir=DIR            install data files in DIR [PREFIX/share/avconv]
85   --docdir=DIR             install documentation in DIR [PREFIX/share/doc/libav]
86   --libdir=DIR             install libs in DIR [PREFIX/lib]
87   --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
88   --incdir=DIR             install includes in DIR [PREFIX/include]
89   --mandir=DIR             install man page in DIR [PREFIX/share/man]
90   --enable-rpath           use rpath when linking programs (USE WITH CARE)
91
92 Licensing options:
93   --enable-gpl             allow use of GPL code, the resulting libs
94                            and binaries will be under GPL [no]
95   --enable-version3        upgrade (L)GPL to version 3 [no]
96   --enable-nonfree         allow use of nonfree code, the resulting libs
97                            and binaries will be unredistributable [no]
98
99 Configuration options:
100   --disable-static         do not build static libraries [no]
101   --enable-shared          build shared libraries [no]
102   --enable-small           optimize for size instead of speed
103   --enable-runtime-cpudetect detect CPU capabilities at runtime (bigger binary)
104   --enable-gray            enable full grayscale support (slower color)
105   --disable-swscale-alpha  disable alpha channel support in swscale
106   --disable-all            disable building components, libraries and programs
107
108 Program options:
109   --disable-programs       do not build command line programs
110   --disable-avconv         disable avconv build
111   --disable-avplay         disable avplay build
112   --disable-avprobe        disable avprobe build
113   --disable-avserver       deprecated, does nothing
114
115 Component options:
116   --disable-doc            do not build documentation
117   --disable-pod2man        do not build manual pages
118   --disable-texi2html      do not build HTML documentation
119   --disable-avdevice       disable libavdevice build
120   --disable-avcodec        disable libavcodec build
121   --disable-avformat       disable libavformat build
122   --disable-avutil         disable libavutil build
123   --disable-swscale        disable libswscale build
124   --disable-avfilter       disable video filter support [no]
125   --disable-avresample     disable libavresample build [no]
126   --disable-pthreads       disable pthreads [auto]
127   --disable-w32threads     disable Win32 threads [auto]
128   --disable-network        disable network support [no]
129   --disable-dct            disable DCT code
130   --disable-error-resilience disable error resilience code
131   --disable-lsp            disable LSP code
132   --disable-lzo            disable LZO decoder code
133   --disable-mdct           disable MDCT code
134   --disable-rdft           disable RDFT code
135   --disable-fft            disable FFT code
136   --disable-faan           disable floating point AAN (I)DCT code
137
138 Individual component options:
139   --disable-everything     disable all components listed below
140   --disable-encoder=NAME   disable encoder NAME
141   --enable-encoder=NAME    enable encoder NAME
142   --disable-encoders       disable all encoders
143   --disable-decoder=NAME   disable decoder NAME
144   --enable-decoder=NAME    enable decoder NAME
145   --disable-decoders       disable all decoders
146   --disable-hwaccel=NAME   disable hwaccel NAME
147   --enable-hwaccel=NAME    enable hwaccel NAME
148   --disable-hwaccels       disable all hwaccels
149   --disable-muxer=NAME     disable muxer NAME
150   --enable-muxer=NAME      enable muxer NAME
151   --disable-muxers         disable all muxers
152   --disable-demuxer=NAME   disable demuxer NAME
153   --enable-demuxer=NAME    enable demuxer NAME
154   --disable-demuxers       disable all demuxers
155   --enable-parser=NAME     enable parser NAME
156   --disable-parser=NAME    disable parser NAME
157   --disable-parsers        disable all parsers
158   --enable-bsf=NAME        enable bitstream filter NAME
159   --disable-bsf=NAME       disable bitstream filter NAME
160   --disable-bsfs           disable all bitstream filters
161   --enable-protocol=NAME   enable protocol NAME
162   --disable-protocol=NAME  disable protocol NAME
163   --disable-protocols      disable all protocols
164   --enable-indev=NAME      enable input device NAME
165   --disable-indev=NAME     disable input device NAME
166   --disable-indevs         disable input devices
167   --enable-outdev=NAME     enable output device NAME
168   --disable-outdev=NAME    disable output device NAME
169   --disable-outdevs        disable output devices
170   --disable-devices        disable all devices
171   --enable-filter=NAME     enable filter NAME
172   --disable-filter=NAME    disable filter NAME
173   --disable-filters        disable all filters
174
175 External library support:
176
177   Using any of the following switches will allow Libav to link to the
178   corresponding external library. All the components depending on that library
179   will become enabled, if all their other dependencies are met and they are not
180   explicitly disabled. E.g. --enable-libwavpack will enable linking to
181   libwavpack and allow the libwavpack encoder to be built, unless it is
182   specifically disabled with --disable-encoder=libwavpack.
183
184   Note that only the system libraries are auto-detected. All the other external
185   libraries must be explicitly enabled.
186
187   Also note that the following help text describes the purpose of the libraries
188   themselves, not all their features will necessarily be usable by Libav.
189
190   --enable-avisynth          video frameserver
191   --enable-avxsynth          Linux version of AviSynth
192   --enable-bzlib             bzip2 compression [autodetect]
193   --enable-frei0r            video filtering plugins
194   --enable-gnutls            crypto
195   --enable-libbs2b           Bauer stereophonic-to-binaural DSP
196   --enable-libcdio           audio CD input
197   --enable-libdc1394         IEEE 1394/Firewire camera input
198   --enable-libdcadec         DCA audio decoding
199   --enable-libfaac           AAC audio encoding
200   --enable-libfdk-aac        AAC audio encoding/decoding
201   --enable-libfontconfig     font configuration and management
202   --enable-libfreetype       font rendering
203   --enable-libgsm            GSM audio encoding/decoding
204   --enable-libhdcd           HDCD decoding filter
205   --enable-libilbc           ILBC audio encoding/decoding
206   --enable-libjack           JACK audio sound server
207   --enable-libkvazaar        HEVC video encoding
208   --enable-libmp3lame        MP3 audio encoding
209   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
210   --enable-libopencore-amrwb AMR-WB audio decoding
211   --enable-libopencv         computer vision
212   --enable-libopenh264       H.264 video encoding/decoding
213   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
214   --enable-libopus           Opus audio encoding/decoding
215   --enable-libpulse          Pulseaudio sound server
216   --enable-librtmp           RTMP streaming
217   --enable-libschroedinger   Dirac video encoding/decoding
218   --enable-libsnappy         snappy compression
219   --enable-libspeex          Speex audio encoding/decoding
220   --enable-libtheora         Theora video encoding/decoding
221   --enable-libtwolame        MP2 audio encoding
222   --enable-libvo-aacenc      AAC audio encoding
223   --enable-libvo-amrwbenc    AMR-WB audio encoding
224   --enable-libvorbis         Vorbis audio encoding/decoding
225   --enable-libvpx            VP* video encoding/decoding
226   --enable-libwavpack        Wavpack audio encoding/decoding
227   --enable-libwebp           WebP image encoding/decoding
228   --enable-libx264           H.264 video encoding
229   --enable-libx265           HEVC video encoding
230   --enable-libxavs           Chinese AVS video encoding
231   --enable-libxcb            X window system protocol communication
232   --enable-libxcb-shm        X11 shm communication [auto]
233   --enable-libxcb-xfixes     X11 mouse rendering [auto]
234   --enable-libxvid           MPEG-4 ASP video encoding
235   --enable-openssl           crypto
236   --enable-zlib              compression [autodetect]
237
238   The following libraries provide various hardware acceleration features:
239   --enable-cuda    Nvidia CUDA (dynamically linked)
240   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
241   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
242   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
243   --enable-libnpp  Nvidia CUDA processing
244   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
245   --enable-nvenc   Nvidia video encoding
246   --enable-omx     OpenMAX IL
247   --enable-omx-rpi OpenMAX IL for Raspberry Pi
248   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
249   --enable-vda     Apple Video Decode Acceleration [auto]
250   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
251
252 Toolchain options:
253   --arch=ARCH              select architecture [$arch]
254   --cpu=CPU                select the minimum required CPU (affects
255                            instruction selection, may crash on older CPUs)
256   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
257   --enable-cross-compile   assume a cross-compiler is used
258   --sysroot=PATH           root of cross-build tree
259   --sysinclude=PATH        location of cross-build system headers
260   --target-os=OS           compiler targets OS [$target_os]
261   --target-exec=CMD        command to run executables on target
262   --target-path=DIR        path to view of build directory on target
263   --target-samples=DIR     path to samples directory on target
264   --toolchain=NAME         set tool defaults according to NAME
265   --nm=NM                  use nm tool
266   --ar=AR                  use archive tool AR [$ar_default]
267   --as=AS                  use assembler AS [$as_default]
268   --cc=CC                  use C compiler CC [$cc_default]
269   --objcc=OCC              use ObjC compiler OCC [$cc_default]
270   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
271   --ld=LD                  use linker LD
272   --x86asmexe=X86ASM       use x86 assembler X86ASM
273   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
274   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
275   --host-cc=HOSTCC         use host C compiler HOSTCC
276   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
277   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
278   --host-ld=HOSTLD         use host linker HOSTLD
279   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
280   --host-libs=HLIBS        use libs HLIBS when linking for host
281   --host-os=OS             compiler host OS [$target_os]
282   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
283   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
284   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
285   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
286   --extra-libs=ELIBS       add ELIBS [$ELIBS]
287   --extra-version=STRING   version string suffix []
288   --optflags=OPTFLAGS      override optimization-related compiler flags
289   --enable-pic             build position-independent code
290   --enable-thumb           compile for Thumb instruction set
291   --enable-lto             use link-time optimization
292   --env="ENV=override"     override the environment variables
293
294 Advanced options (experts only):
295   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
296   --custom-allocator=NAME  use a supported custom allocator
297   --disable-symver         disable symbol versioning
298   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
299   --disable-safe-bitstream-reader
300                            disable buffer boundary checking in bitreaders
301                            (faster, but may crash)
302   --enable-sram            allow use of on-chip SRAM
303
304 Optimization options (experts only):
305   --disable-asm            disable all assembly optimizations
306   --disable-altivec        disable AltiVec optimizations
307   --disable-vsx            disable VSX optimizations
308   --disable-power8         disable POWER8 optimizations
309   --disable-amd3dnow       disable 3DNow! optimizations
310   --disable-amd3dnowext    disable 3DNow! extended optimizations
311   --disable-mmx            disable MMX optimizations
312   --disable-mmxext         disable MMXEXT optimizations
313   --disable-sse            disable SSE optimizations
314   --disable-sse2           disable SSE2 optimizations
315   --disable-sse3           disable SSE3 optimizations
316   --disable-ssse3          disable SSSE3 optimizations
317   --disable-sse4           disable SSE4 optimizations
318   --disable-sse42          disable SSE4.2 optimizations
319   --disable-avx            disable AVX optimizations
320   --disable-xop            disable XOP optimizations
321   --disable-fma3           disable FMA3 optimizations
322   --disable-fma4           disable FMA4 optimizations
323   --disable-avx2           disable AVX2 optimizations
324   --disable-armv5te        disable armv5te optimizations
325   --disable-armv6          disable armv6 optimizations
326   --disable-armv6t2        disable armv6t2 optimizations
327   --disable-vfp            disable VFP optimizations
328   --disable-neon           disable NEON optimizations
329   --disable-inline-asm     disable use of inline assembly
330   --disable-x86asm         disable use of standalone x86 assembly
331
332 Developer options (useful when working on Libav itself):
333   --disable-debug          disable debugging symbols
334   --enable-debug=LEVEL     set the debug level [$debuglevel]
335   --disable-optimizations  disable compiler optimizations
336   --enable-extra-warnings  enable more compiler warnings
337   --samples=PATH           location of test samples for FATE, if not set use
338                            \$LIBAV_SAMPLES at make invocation time.
339   --enable-neon-clobber-test check NEON registers for clobbering (should be
340                            used only for debugging purposes)
341   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
342                            should be used only for debugging purposes)
343   --enable-random          randomly enable/disable components
344   --disable-random
345   --enable-random=LIST     randomly enable/disable specific components or
346   --disable-random=LIST    component groups. LIST is a comma-separated list
347                            of NAME[:PROB] entries where NAME is a component
348                            (group) and PROB the probability associated with
349                            NAME (default 0.5).
350   --random-seed=VALUE      seed value for --enable/disable-random
351   --disable-valgrind-backtrace do not print a backtrace under Valgrind
352                            (only applies to --disable-optimizations builds)
353   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
354                            in the name) of tests whose result is ignored
355
356 NOTE: Object files are built at the place where configure is launched.
357 EOF
358   exit 0
359 }
360
361 quotes='""'
362
363 log(){
364     echo "$@" >> $logfile
365 }
366
367 log_file(){
368     log BEGIN $1
369     i=1
370     while read line; do
371         printf '%5s   %s\n' "${i}" "${line}"
372         i=$(($i+1))
373     done < $1 >> $logfile
374     log END $1
375 }
376
377 echolog(){
378     log "$@"
379     echo "$@"
380 }
381
382 warn(){
383     log "WARNING: $*"
384     WARNINGS="${WARNINGS}WARNING: $*\n"
385 }
386
387 die(){
388     echolog "$@"
389     cat <<EOF
390
391 If you think configure made a mistake, make sure you are using the latest
392 version from Git.  If the latest version fails, report the problem to the
393 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
394 EOF
395     if disabled logging; then
396         cat <<EOF
397 Rerun configure with logging enabled (do not use --disable-logging), and
398 include the log this produces with your report.
399 EOF
400     else
401         cat <<EOF
402 Include the log file "$logfile" produced by configure as this will help
403 solving the problem.
404 EOF
405     fi
406     exit 1
407 }
408
409 # Avoid locale weirdness, besides we really just want to translate ASCII.
410 toupper(){
411     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
412 }
413
414 tolower(){
415     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
416 }
417
418 c_escape(){
419     echo "$*" | sed 's/["\\]/\\\0/g'
420 }
421
422 sh_quote(){
423     v=$(echo "$1" | sed "s/'/'\\\\''/g")
424     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
425     echo "$v"
426 }
427
428 cleanws(){
429     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
430 }
431
432 filter(){
433     pat=$1
434     shift
435     for v; do
436         eval "case $v in $pat) printf '%s ' $v ;; esac"
437     done
438 }
439
440 filter_out(){
441     pat=$1
442     shift
443     for v; do
444         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
445     done
446 }
447
448 map(){
449     m=$1
450     shift
451     for v; do eval $m; done
452 }
453
454 add_suffix(){
455     suffix=$1
456     shift
457     for v; do echo ${v}${suffix}; done
458 }
459
460 set_all(){
461     value=$1
462     shift
463     for var in $*; do
464         eval $var=$value
465     done
466 }
467
468 set_weak(){
469     value=$1
470     shift
471     for var; do
472         eval : \${$var:=$value}
473     done
474 }
475
476 sanitize_var_name(){
477     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
478 }
479
480 set_safe(){
481     var=$1
482     shift
483     eval $(sanitize_var_name "$var")='$*'
484 }
485
486 get_safe(){
487     eval echo \$$(sanitize_var_name "$1")
488 }
489
490 pushvar(){
491     for pvar in $*; do
492         eval level=\${${pvar}_level:=0}
493         eval ${pvar}_${level}="\$$pvar"
494         eval ${pvar}_level=$(($level+1))
495     done
496 }
497
498 popvar(){
499     for pvar in $*; do
500         eval level=\${${pvar}_level:-0}
501         test $level = 0 && continue
502         eval level=$(($level-1))
503         eval $pvar="\${${pvar}_${level}}"
504         eval ${pvar}_level=$level
505         eval unset ${pvar}_${level}
506     done
507 }
508
509 enable(){
510     set_all yes $*
511 }
512
513 disable(){
514     set_all no $*
515 }
516
517 enable_weak(){
518     set_weak yes $*
519 }
520
521 disable_weak(){
522     set_weak no $*
523 }
524
525 enable_safe(){
526     for var; do
527         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
528     done
529 }
530
531 disable_safe(){
532     for var; do
533         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
534     done
535 }
536
537 do_enable_deep(){
538     for var; do
539         enabled $var && continue
540         eval sel="\$${var}_select"
541         eval sgs="\$${var}_suggest"
542         pushvar var sgs
543         enable_deep $sel
544         popvar sgs
545         enable_deep_weak $sgs
546         popvar var
547     done
548 }
549
550 enable_deep(){
551     do_enable_deep $*
552     enable $*
553 }
554
555 enable_deep_weak(){
556     for var; do
557         disabled $var && continue
558         pushvar var
559         do_enable_deep $var
560         popvar var
561         enable_weak $var
562     done
563 }
564
565 enabled(){
566     test "${1#!}" = "$1" && op== || op=!=
567     eval test "x\$${1#!}" $op "xyes"
568 }
569
570 disabled(){
571     test "${1#!}" = "$1" && op== || op=!=
572     eval test "x\$${1#!}" $op "xno"
573 }
574
575 enabled_all(){
576     for opt; do
577         enabled $opt || return 1
578     done
579 }
580
581 disabled_all(){
582     for opt; do
583         disabled $opt || return 1
584     done
585 }
586
587 enabled_any(){
588     for opt; do
589         enabled $opt && return 0
590     done
591 }
592
593 disabled_any(){
594     for opt; do
595         disabled $opt && return 0
596     done
597     return 1
598 }
599
600 set_default(){
601     for opt; do
602         eval : \${$opt:=\$${opt}_default}
603     done
604 }
605
606 is_in(){
607     value=$1
608     shift
609     for var in $*; do
610         [ $var = $value ] && return 0
611     done
612     return 1
613 }
614
615 check_deps(){
616     for cfg; do
617         enabled ${cfg}_checking && die "Circular dependency for $cfg."
618         disabled ${cfg}_checking && continue
619         enable ${cfg}_checking
620         append allopts $cfg
621
622         eval dep_all="\$${cfg}_deps"
623         eval dep_any="\$${cfg}_deps_any"
624         eval dep_con="\$${cfg}_conflict"
625         eval dep_sel="\$${cfg}_select"
626         eval dep_sgs="\$${cfg}_suggest"
627         eval dep_ifa="\$${cfg}_if"
628         eval dep_ifn="\$${cfg}_if_any"
629
630         pushvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
631         check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
632         popvar cfg dep_all dep_any dep_con dep_sel dep_sgs dep_ifa dep_ifn
633
634         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
635         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
636         enabled_all  $dep_all || disable $cfg
637         enabled_any  $dep_any || disable $cfg
638         disabled_all $dep_con || disable $cfg
639         disabled_any $dep_sel && disable $cfg
640
641         if enabled $cfg; then
642             enable_deep $dep_sel
643             enable_deep_weak $dep_sgs
644             for dep in $dep_all $dep_any $dep_sgs; do
645                 # filter out library deps, these do not belong in extralibs
646                 is_in $dep $LIBRARY_LIST && continue
647                 enabled $dep && eval append ${cfg}_extralibs ${dep}_extralibs
648             done
649         fi
650
651         disable ${cfg}_checking
652     done
653 }
654
655 print_config(){
656     pfx=$1
657     files=$2
658     shift 2
659     map 'eval echo "$v \${$v:-no}"' "$@" |
660     awk "BEGIN { split(\"$files\", files) }
661         {
662             c = \"$pfx\" toupper(\$1);
663             v = \$2;
664             sub(/yes/, 1, v);
665             sub(/no/,  0, v);
666             for (f in files) {
667                 file = files[f];
668                 if (file ~ /\\.h\$/) {
669                     printf(\"#define %s %d\\n\", c, v) >>file;
670                 } else if (file ~ /\\.asm\$/) {
671                     printf(\"%%define %s %d\\n\", c, v) >>file;
672                 } else if (file ~ /\\.mak\$/) {
673                     n = -v ? \"\" : \"!\";
674                     printf(\"%s%s=yes\\n\", n, c) >>file;
675                 }
676             }
677         }"
678 }
679
680 print_enabled(){
681     suf=$1
682     shift
683     for v; do
684         enabled $v && printf "%s\n" ${v%$suf}
685     done
686 }
687
688 append(){
689     var=$1
690     shift
691     eval "$var=\"\$$var $*\""
692 }
693
694 prepend(){
695     var=$1
696     shift
697     eval "$var=\"$* \$$var\""
698 }
699
700 unique(){
701     var=$1
702     uniq_list=""
703     for tok in $(eval echo \$$var); do
704         uniq_list="$(filter_out $tok $uniq_list) $tok"
705     done
706     eval "$var=\"${uniq_list}\""
707 }
708
709 resolve(){
710     var=$1
711     tmpvar=
712     for entry in $(eval echo \$$var); do
713         tmpvar="$tmpvar $(eval echo \$${entry})"
714     done
715     eval "$var=\"${tmpvar}\""
716 }
717
718 add_cppflags(){
719     append CPPFLAGS "$@"
720 }
721
722 add_cflags(){
723     append CFLAGS $($cflags_filter "$@")
724 }
725
726 add_cflags_headers(){
727     append CFLAGS_HEADERS $($cflags_filter "$@")
728 }
729
730 add_asflags(){
731     append ASFLAGS $($asflags_filter "$@")
732 }
733
734 add_objcflags(){
735     append OBJCFLAGS $($objcflags_filter "$@")
736 }
737
738 add_ldflags(){
739     append LDFLAGS $($ldflags_filter "$@")
740 }
741
742 add_ldexeflags(){
743     append LDEXEFLAGS $($ldflags_filter "$@")
744 }
745
746 add_stripflags(){
747     append STRIPFLAGS "$@"
748 }
749
750 add_extralibs(){
751     prepend extralibs $($ldflags_filter "$@")
752 }
753
754 add_host_cppflags(){
755     append host_cppflags "$@"
756 }
757
758 add_host_cflags(){
759     append host_cflags $($host_cflags_filter "$@")
760 }
761
762 add_host_ldflags(){
763     append host_ldflags $($host_ldflags_filter "$@")
764 }
765
766 add_compat(){
767     append compat_objs $1
768     shift
769     map 'add_cppflags -D$v' "$@"
770 }
771
772 check_cmd(){
773     log "$@"
774     "$@" >> $logfile 2>&1
775 }
776
777 cc_o(){
778     eval printf '%s\\n' $CC_O
779 }
780
781 cc_e(){
782     eval printf '%s\\n' $CC_E
783 }
784
785 check_cc(){
786     log check_cc "$@"
787     cat > $TMPC
788     log_file $TMPC
789     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
790 }
791
792 check_objcc(){
793     log check_objcc "$@"
794     cat > $TMPC
795     log_file $TMPC
796     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
797 }
798
799 check_cpp(){
800     log check_cpp "$@"
801     cat > $TMPC
802     log_file $TMPC
803     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
804 }
805
806 as_o(){
807     eval printf '%s\\n' $AS_O
808 }
809
810 check_as(){
811     log check_as "$@"
812     cat > $TMPS
813     log_file $TMPS
814     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
815 }
816
817 check_inline_asm(){
818     log check_inline_asm "$@"
819     name="$1"
820     code="$2"
821     shift 2
822     disable $name
823     check_cc "$@" <<EOF && enable $name
824 void foo(void){ __asm__ volatile($code); }
825 EOF
826 }
827
828 check_insn(){
829     log check_insn "$@"
830     check_inline_asm ${1}_inline "\"$2\""
831     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
832 }
833
834 check_x86asm(){
835     log check_x86asm "$@"
836     echo "$1" > $TMPS
837     log_file $TMPS
838     shift 1
839     check_cmd $x86asmexe $X86ASMFLAGS "$@" -o $TMPO $TMPS
840 }
841
842 ld_o(){
843     eval printf '%s\\n' $LD_O
844 }
845
846 check_ld(){
847     log check_ld "$@"
848     flags=$(filter_out '-l*' "$@")
849     libs=$(filter '-l*' "$@")
850     check_cc $($cflags_filter $flags) || return
851     flags=$($ldflags_filter $flags)
852     libs=$($ldflags_filter $libs)
853     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
854 }
855
856 print_include(){
857     hdr=$1
858     test "${hdr%.h}" = "${hdr}" &&
859         echo "#include $hdr"    ||
860         echo "#include <$hdr>"
861 }
862
863 check_code(){
864     log check_code "$@"
865     check=$1
866     headers=$2
867     code=$3
868     shift 3
869     {
870         for hdr in $headers; do
871             print_include $hdr
872         done
873         echo "int main(void) { $code; return 0; }"
874     } | check_$check "$@"
875 }
876
877 check_cppflags(){
878     log check_cppflags "$@"
879     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
880 #include <stdlib.h>;
881 EOF
882 }
883
884 test_cflags(){
885     log test_cflags "$@"
886     set -- $($cflags_filter "$@")
887     check_cc "$@" <<EOF
888 int x;
889 EOF
890 }
891
892 check_cflags(){
893     log check_cflags "$@"
894     test_cflags "$@" && add_cflags "$@"
895 }
896
897 test_objcflags(){
898     log test_objcflags "$@"
899     set -- $($objcflags_filter "$@")
900     check_objcc "$@" <<EOF
901 int x;
902 EOF
903 }
904
905 check_objcflags(){
906     log check_objcflags "$@"
907     test_objcflags "$@" && add_objcflags "$@"
908 }
909
910 test_ldflags(){
911     log test_ldflags "$@"
912     check_ld "$@" <<EOF
913 int main(void){ return 0; }
914 EOF
915 }
916
917 check_ldflags(){
918     log check_ldflags "$@"
919     test_ldflags "$@" && add_ldflags "$@"
920 }
921
922 test_stripflags(){
923     log test_stripflags "$@"
924     # call check_cc to get a fresh TMPO
925     check_cc <<EOF
926 int main(void) { return 0; }
927 EOF
928     check_cmd $strip $STRIPFLAGS "$@" $TMPO
929 }
930
931 check_stripflags(){
932     log check_stripflags "$@"
933     test_stripflags "$@" && add_stripflags "$@"
934 }
935
936 check_header(){
937     log check_header "$@"
938     header=$1
939     shift
940     disable_safe $header
941     check_cpp "$@" <<EOF && enable_safe $header
942 #include <$header>
943 int x;
944 EOF
945 }
946
947 check_func(){
948     log check_func "$@"
949     func=$1
950     shift
951     disable $func
952     check_ld "$@" <<EOF && enable $func
953 extern int $func();
954 int main(void){ $func(); }
955 EOF
956 }
957
958 check_mathfunc(){
959     log check_mathfunc "$@"
960     func=$1
961     narg=$2
962     shift 2
963     test $narg = 2 && args="f, g" || args="f"
964     disable $func
965     check_ld "$@" <<EOF && enable $func
966 #include <math.h>
967 float foo(float f, float g) { return $func($args); }
968 int main(void){ return 0; }
969 EOF
970 }
971
972 check_func_headers(){
973     log check_func_headers "$@"
974     headers=$1
975     funcs=$2
976     shift 2
977     {
978         for hdr in $headers; do
979             print_include $hdr
980         done
981         for func in $funcs; do
982             echo "long check_$func(void) { return (long) $func; }"
983         done
984         echo "int main(void) { return 0; }"
985     } | check_ld "$@" && enable $funcs && enable_safe $headers
986 }
987
988 check_cpp_condition(){
989     log check_cpp_condition "$@"
990     header=$1
991     condition=$2
992     shift 2
993     check_cpp "$@" <<EOF
994 #include <$header>
995 #if !($condition)
996 #error "unsatisfied condition: $condition"
997 #endif
998 EOF
999 }
1000
1001 test_cflags_cpp(){
1002     log test_cflags_cpp "$@"
1003     flags=$1
1004     condition=$2
1005     shift 2
1006     set -- $($cflags_filter "$flags")
1007     check_cpp "$@" <<EOF
1008 #if !($condition)
1009 #error "unsatisfied condition: $condition"
1010 #endif
1011 EOF
1012 }
1013
1014 check_lib(){
1015     log check_lib "$@"
1016     name="$1"
1017     headers="$2"
1018     funcs="$3"
1019     shift 3
1020     disable $name
1021     check_func_headers "$headers" "$funcs" "$@" &&
1022         enable $name && eval ${name}_extralibs="\$@"
1023 }
1024
1025 check_pkg_config(){
1026     log check_pkg_config "$@"
1027     name="$1"
1028     pkg_version="$2"
1029     pkg="${2%% *}"
1030     headers="$3"
1031     funcs="$4"
1032     shift 4
1033     disable $name
1034     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1035     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1036     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1037     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1038         enable $name &&
1039         add_cflags    "$pkg_cflags" &&
1040         eval $(sanitize_var_name ${name}_extralibs)="\$pkg_libs"
1041 }
1042
1043 check_exec(){
1044     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1045 }
1046
1047 check_exec_crash(){
1048     log check_exec_crash "$@"
1049     code=$(cat)
1050
1051     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1052     # are safe but may not be available everywhere.  Thus we use
1053     # raise(SIGTERM) instead.  The check is run in a subshell so we
1054     # can redirect the "Terminated" message from the shell.  SIGBUS
1055     # is not defined by standard C so it is used conditionally.
1056
1057     (check_exec "$@") >> $logfile 2>&1 <<EOF
1058 #include <signal.h>
1059 static void sighandler(int sig){
1060     raise(SIGTERM);
1061 }
1062 int foo(void){
1063     $code
1064 }
1065 int (*func_ptr)(void) = foo;
1066 int main(void){
1067     signal(SIGILL, sighandler);
1068     signal(SIGFPE, sighandler);
1069     signal(SIGSEGV, sighandler);
1070 #ifdef SIGBUS
1071     signal(SIGBUS, sighandler);
1072 #endif
1073     return func_ptr();
1074 }
1075 EOF
1076 }
1077
1078 check_type(){
1079     log check_type "$@"
1080     headers=$1
1081     type=$2
1082     shift 2
1083     disable_safe "$type"
1084     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1085 }
1086
1087 check_struct(){
1088     log check_struct "$@"
1089     headers=$1
1090     struct=$2
1091     member=$3
1092     shift 3
1093     disable_safe "${struct}_${member}"
1094     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1095         enable_safe "${struct}_${member}"
1096 }
1097
1098 check_builtin(){
1099     log check_builtin "$@"
1100     name=$1
1101     headers=$2
1102     builtin=$3
1103     shift 3
1104     disable "$name"
1105     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1106 }
1107
1108 check_compile_assert(){
1109     log check_compile_assert "$@"
1110     name=$1
1111     headers=$2
1112     condition=$3
1113     shift 3
1114     disable "$name"
1115     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1116 }
1117
1118 require(){
1119     log require "$@"
1120     name_version="$1"
1121     name="${1%% *}"
1122     headers="$2"
1123     func="$3"
1124     shift 3
1125     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1126 }
1127
1128 require_header(){
1129     log require "$@"
1130     header="$1"
1131     shift
1132     check_header "$header" "$@" || die "ERROR: $header not found"
1133 }
1134
1135 require_cpp_condition(){
1136     log require "$@"
1137     header="$1"
1138     condition="$2"
1139     shift 2
1140     check_cpp_condition "$header" "$condition" "$@" || die "ERROR: $condition not satisfied"
1141 }
1142
1143 require_pkg_config(){
1144     log require_pkg_config "$@"
1145     pkg_version="$2"
1146     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1147 }
1148
1149 hostcc_e(){
1150     eval printf '%s\\n' $HOSTCC_E
1151 }
1152
1153 hostcc_o(){
1154     eval printf '%s\\n' $HOSTCC_O
1155 }
1156
1157 check_host_cc(){
1158     log check_host_cc "$@"
1159     cat > $TMPC
1160     log_file $TMPC
1161     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1162 }
1163
1164 check_host_cpp(){
1165     log check_host_cpp "$@"
1166     cat > $TMPC
1167     log_file $TMPC
1168     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1169 }
1170
1171 check_host_cppflags(){
1172     log check_host_cppflags "$@"
1173     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1174 #include <stdlib.h>;
1175 EOF
1176 }
1177
1178 check_host_cflags(){
1179     log check_host_cflags "$@"
1180     set -- $($host_cflags_filter "$@")
1181     check_host_cc "$@" <<EOF && append host_cflags "$@"
1182 int x;
1183 EOF
1184 }
1185
1186 check_host_cpp_condition(){
1187     log check_host_cpp_condition "$@"
1188     header=$1
1189     condition=$2
1190     shift 2
1191     check_host_cpp "$@" <<EOF
1192 #include <$header>
1193 #if !($condition)
1194 #error "unsatisfied condition: $condition"
1195 #endif
1196 EOF
1197 }
1198
1199 apply(){
1200     file=$1
1201     shift
1202     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1203 }
1204
1205 cp_if_changed(){
1206     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1207     mkdir -p "$(dirname $2)"
1208     cp -f "$1" "$2"
1209 }
1210
1211 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1212 # system-dependent things.
1213
1214 AVCODEC_COMPONENTS="
1215     bsfs
1216     decoders
1217     encoders
1218     hwaccels
1219     parsers
1220 "
1221
1222 AVDEVICE_COMPONENTS="
1223     indevs
1224     outdevs
1225 "
1226 AVFILTER_COMPONENTS="
1227     filters
1228 "
1229 AVFORMAT_COMPONENTS="
1230     demuxers
1231     muxers
1232     protocols
1233 "
1234
1235 AVRESAMPLE_COMPONENTS=""
1236 AVUTIL_COMPONENTS=""
1237
1238 COMPONENT_LIST="
1239     $AVCODEC_COMPONENTS
1240     $AVDEVICE_COMPONENTS
1241     $AVFILTER_COMPONENTS
1242     $AVFORMAT_COMPONENTS
1243     $AVRESAMPLE_COMPONENTS
1244     $AVUTIL_COMPONENTS
1245 "
1246
1247 EXAMPLE_LIST="
1248     decode_audio_example
1249     decode_video_example
1250     encode_audio_example
1251     encode_video_example
1252     filter_audio_example
1253     metadata_example
1254     output_example
1255     qsvdec_example
1256     transcode_aac_example
1257 "
1258
1259 # catchall list of things that require external libs to link
1260 EXTRALIBS_LIST="
1261     cpu_init
1262     cws2fws
1263 "
1264
1265 HWACCEL_LIBRARY_NONFREE_LIST="
1266     cuda
1267     libnpp
1268 "
1269 HWACCEL_LIBRARY_LIST="
1270     $HWACCEL_LIBRARY_NONFREE_LIST
1271     d3d11va
1272     dxva2
1273     libmfx
1274     mmal
1275     nvenc
1276     omx
1277     vaapi
1278     vda
1279     vdpau
1280 "
1281
1282 EXTERNAL_LIBRARY_GPL_LIST="
1283     libcdio
1284     libx264
1285     libx265
1286     libxavs
1287     libxvid
1288 "
1289
1290 EXTERNAL_LIBRARY_NONFREE_LIST="
1291     libfaac
1292     libfdk_aac
1293     openssl
1294 "
1295
1296 EXTERNAL_LIBRARY_VERSION3_LIST="
1297     libopencore_amrnb
1298     libopencore_amrwb
1299     libvo_aacenc
1300     libvo_amrwbenc
1301 "
1302
1303 EXTERNAL_LIBRARY_LIST="
1304     $EXTERNAL_LIBRARY_GPL_LIST
1305     $EXTERNAL_LIBRARY_NONFREE_LIST
1306     $EXTERNAL_LIBRARY_VERSION3_LIST
1307     avisynth
1308     avxsynth
1309     frei0r
1310     gnutls
1311     libbs2b
1312     libdc1394
1313     libdcadec
1314     libfontconfig
1315     libfreetype
1316     libgsm
1317     libhdcd
1318     libilbc
1319     libjack
1320     libkvazaar
1321     libmp3lame
1322     libopencv
1323     libopenh264
1324     libopenjpeg
1325     libopus
1326     libpulse
1327     librtmp
1328     libschroedinger
1329     libsnappy
1330     libspeex
1331     libtheora
1332     libtwolame
1333     libvorbis
1334     libvpx
1335     libwavpack
1336     libwebp
1337     libxcb
1338     libxcb_shm
1339     libxcb_xfixes
1340 "
1341
1342 SYSTEM_LIBRARY_LIST="
1343     bzlib
1344     zlib
1345 "
1346
1347 FEATURE_LIST="
1348     gray
1349     hardcoded_tables
1350     omx_rpi
1351     runtime_cpudetect
1352     safe_bitstream_reader
1353     shared
1354     small
1355     sram
1356     static
1357     swscale_alpha
1358 "
1359
1360 LIBRARY_LIST="
1361     avcodec
1362     avdevice
1363     avfilter
1364     avformat
1365     avresample
1366     avutil
1367     swscale
1368 "
1369
1370 LICENSE_LIST="
1371     gpl
1372     nonfree
1373     version3
1374 "
1375
1376 PROGRAM_LIST="
1377     avconv
1378     avplay
1379     avprobe
1380 "
1381
1382 SUBSYSTEM_LIST="
1383     dct
1384     doc
1385     error_resilience
1386     faan
1387     fft
1388     lsp
1389     lzo
1390     mdct
1391     network
1392     rdft
1393 "
1394
1395 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1396 CONFIG_LIST="
1397     $EXAMPLE_LIST
1398     $EXTERNAL_LIBRARY_LIST
1399     $HWACCEL_LIBRARY_LIST
1400     $FEATURE_LIST
1401     $LICENSE_LIST
1402     $LIBRARY_LIST
1403     $PROGRAM_LIST
1404     $SUBSYSTEM_LIST
1405     $SYSTEM_LIBRARY_LIST
1406     neon_clobber_test
1407     pic
1408     pod2man
1409     texi2html
1410     thumb
1411     valgrind_backtrace
1412     xmm_clobber_test
1413     $COMPONENT_LIST
1414 "
1415
1416 THREADS_LIST="
1417     pthreads
1418     w32threads
1419 "
1420
1421 ATOMICS_LIST="
1422     atomics_gcc
1423     atomics_suncc
1424     atomics_win32
1425 "
1426
1427 ARCH_LIST="
1428     aarch64
1429     alpha
1430     arm
1431     avr32
1432     avr32_ap
1433     avr32_uc
1434     bfin
1435     ia64
1436     m68k
1437     mips
1438     mips64
1439     parisc
1440     ppc
1441     ppc64
1442     s390
1443     sh4
1444     sparc
1445     sparc64
1446     tilegx
1447     tilepro
1448     tomi
1449     x86
1450     x86_32
1451     x86_64
1452 "
1453
1454 ARCH_EXT_LIST_ARM="
1455     armv5te
1456     armv6
1457     armv6t2
1458     armv8
1459     neon
1460     vfp
1461     vfpv3
1462 "
1463
1464 ARCH_EXT_LIST_X86_SIMD="
1465     amd3dnow
1466     amd3dnowext
1467     avx
1468     avx2
1469     fma3
1470     fma4
1471     mmx
1472     mmxext
1473     sse
1474     sse2
1475     sse3
1476     sse4
1477     sse42
1478     ssse3
1479     xop
1480 "
1481
1482 ARCH_EXT_LIST_PPC="
1483     altivec
1484     dcbzl
1485     ldbrx
1486     power8
1487     ppc4xx
1488     vsx
1489 "
1490
1491 ARCH_EXT_LIST_X86="
1492     $ARCH_EXT_LIST_X86_SIMD
1493     cpunop
1494     i686
1495 "
1496
1497 ARCH_EXT_LIST_MIPS="
1498     loongson
1499     mips32r1
1500     mips64r1
1501     mips32r2
1502     mips64r2
1503     mips32r6
1504     mips64r6
1505 "
1506
1507 ARCH_EXT_LIST="
1508     $ARCH_EXT_LIST_ARM
1509     $ARCH_EXT_LIST_MIPS
1510     $ARCH_EXT_LIST_PPC
1511     $ARCH_EXT_LIST_X86
1512     vis
1513 "
1514
1515 ARCH_FEATURES="
1516     aligned_stack
1517     fast_64bit
1518     fast_clz
1519     fast_cmov
1520     local_aligned_8
1521     local_aligned_16
1522     local_aligned_32
1523     simd_align_16
1524     simd_align_32
1525 "
1526
1527 BUILTIN_LIST="
1528     atomic_cas_ptr
1529     machine_rw_barrier
1530     MemoryBarrier
1531     mm_empty
1532     rdtsc
1533     sem_timedwait
1534     sync_val_compare_and_swap
1535 "
1536 HAVE_LIST_CMDLINE="
1537     inline_asm
1538     symver
1539     x86asm
1540 "
1541
1542 HAVE_LIST_PUB="
1543     bigendian
1544     fast_unaligned
1545 "
1546
1547 HEADERS_LIST="
1548     AVFoundation_AVFoundation_h
1549     alsa_asoundlib_h
1550     altivec_h
1551     arpa_inet_h
1552     cdio_paranoia_h
1553     cdio_paranoia_paranoia_h
1554     d3d11_h
1555     dispatch_dispatch_h
1556     dev_bktr_ioctl_bt848_h
1557     dev_bktr_ioctl_meteor_h
1558     dev_ic_bt8xx_h
1559     dev_video_bktr_ioctl_bt848_h
1560     dev_video_meteor_ioctl_meteor_h
1561     direct_h
1562     dlfcn_h
1563     dxva_h
1564     gsm_h
1565     io_h
1566     mach_mach_time_h
1567     machine_ioctl_bt848_h
1568     machine_ioctl_meteor_h
1569     malloc_h
1570     poll_h
1571     sndio_h
1572     soundcard_h
1573     stdatomic_h
1574     sys_mman_h
1575     sys_param_h
1576     sys_resource_h
1577     sys_select_h
1578     sys_soundcard_h
1579     sys_time_h
1580     sys_un_h
1581     sys_videoio_h
1582     unistd_h
1583     valgrind_valgrind_h
1584     windows_h
1585     winsock2_h
1586 "
1587
1588 INTRINSICS_LIST="
1589     intrinsics_neon
1590 "
1591
1592 MATH_FUNCS="
1593     atanf
1594     atan2f
1595     cbrtf
1596     cosf
1597     exp2
1598     exp2f
1599     expf
1600     isinf
1601     isnan
1602     ldexpf
1603     llrint
1604     llrintf
1605     log2
1606     log2f
1607     log10f
1608     lrint
1609     lrintf
1610     powf
1611     rint
1612     round
1613     roundf
1614     sinf
1615     trunc
1616     truncf
1617 "
1618
1619 SYSTEM_FUNCS="
1620     aligned_malloc
1621     clock_gettime
1622     closesocket
1623     CommandLineToArgvW
1624     CoTaskMemFree
1625     CryptGenRandom
1626     fcntl
1627     flt_lim
1628     fork
1629     getaddrinfo
1630     gethrtime
1631     getopt
1632     GetProcessAffinityMask
1633     GetProcessMemoryInfo
1634     GetProcessTimes
1635     getrusage
1636     GetSystemTimeAsFileTime
1637     gettimeofday
1638     gmtime_r
1639     inet_aton
1640     isatty
1641     jack_port_get_latency_range
1642     LoadLibrary
1643     localtime_r
1644     mach_absolute_time
1645     MapViewOfFile
1646     memalign
1647     mkstemp
1648     mmap
1649     mprotect
1650     nanosleep
1651     posix_memalign
1652     sched_getaffinity
1653     SetConsoleTextAttribute
1654     setmode
1655     setrlimit
1656     Sleep
1657     strerror_r
1658     sysconf
1659     sysctl
1660     usleep
1661     VirtualAlloc
1662 "
1663
1664 TOOLCHAIN_FEATURES="
1665     as_dn_directive
1666     as_fpu_directive
1667     as_func
1668     as_object_arch
1669     asm_mod_q
1670     attribute_may_alias
1671     attribute_packed
1672     blocks_extension
1673     ebp_available
1674     ebx_available
1675     gnu_as
1676     ibm_asm
1677     inline_asm_labels
1678     pragma_deprecated
1679     symver_asm_label
1680     symver_gnu_asm
1681     vfp_args
1682     xform_asm
1683     xmm_clobbers
1684 "
1685
1686 TYPES_LIST="
1687     CONDITION_VARIABLE_Ptr
1688     socklen_t
1689     struct_addrinfo
1690     struct_group_source_req
1691     struct_ip_mreq_source
1692     struct_ipv6_mreq
1693     struct_pollfd
1694     struct_rusage_ru_maxrss
1695     struct_sockaddr_in6
1696     struct_sockaddr_sa_len
1697     struct_sockaddr_storage
1698     struct_v4l2_frmivalenum_discrete
1699 "
1700
1701 HAVE_LIST="
1702     $ARCH_EXT_LIST
1703     $(add_suffix _external $ARCH_EXT_LIST)
1704     $(add_suffix _inline   $ARCH_EXT_LIST)
1705     $ARCH_FEATURES
1706     $BUILTIN_LIST
1707     $HAVE_LIST_CMDLINE
1708     $HAVE_LIST_PUB
1709     $HEADERS_LIST
1710     $INTRINSICS_LIST
1711     $MATH_FUNCS
1712     $SYSTEM_FUNCS
1713     $THREADS_LIST
1714     $TOOLCHAIN_FEATURES
1715     $TYPES_LIST
1716     dos_paths
1717     dxva2_lib
1718     libc_msvcrt
1719     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1720     sdl
1721     section_data_rel_ro
1722     threads
1723     vaapi_drm
1724     vaapi_x11
1725     vdpau_x11
1726 "
1727
1728 # options emitted with CONFIG_ prefix but not available on the command line
1729 CONFIG_EXTRA="
1730     aandcttables
1731     ac3dsp
1732     audio_frame_queue
1733     audiodsp
1734     blockdsp
1735     bswapdsp
1736     cabac
1737     dirac_parse
1738     dvprofile
1739     faandct
1740     faanidct
1741     fdctdsp
1742     flacdsp
1743     fmtconvert
1744     g722dsp
1745     gmp
1746     golomb
1747     gplv3
1748     h263dsp
1749     h264chroma
1750     h264dsp
1751     h264parse
1752     h264pred
1753     h264qpel
1754     hevc_ps
1755     hpeldsp
1756     huffman
1757     huffyuvdsp
1758     huffyuvencdsp
1759     idctdsp
1760     iirfilter
1761     imdct15
1762     intrax8
1763     iso_media
1764     ividsp
1765     jpegtables
1766     lgplv3
1767     libx262
1768     libxcb_shape
1769     lpc
1770     lzf
1771     me_cmp
1772     mpeg_er
1773     mpegaudio
1774     mpegaudiodsp
1775     mpegaudioheader
1776     mpegvideo
1777     mpegvideoenc
1778     mss34dsp
1779     pixblockdsp
1780     qpeldsp
1781     qsv
1782     qsvdec
1783     qsvenc
1784     rangecoder
1785     riffdec
1786     riffenc
1787     rtpdec
1788     rtpenc_chain
1789     rv34dsp
1790     sinewin
1791     snappy
1792     srtp
1793     startcode
1794     texturedsp
1795     texturedspenc
1796     tpeldsp
1797     vaapi_encode
1798     vc1dsp
1799     videodsp
1800     vp3dsp
1801     vp56dsp
1802     vp8dsp
1803     wma_freqs
1804     wmv2dsp
1805 "
1806
1807 CMDLINE_SELECT="
1808     $ARCH_EXT_LIST
1809     $CONFIG_LIST
1810     $HAVE_LIST_CMDLINE
1811     $THREADS_LIST
1812     asm
1813     cross_compile
1814     debug
1815     extra_warnings
1816     logging
1817     lto
1818     optimizations
1819     rpath
1820 "
1821
1822 PATHS_LIST="
1823     bindir
1824     datadir
1825     docdir
1826     incdir
1827     libdir
1828     mandir
1829     prefix
1830     shlibdir
1831 "
1832
1833 CMDLINE_SET="
1834     $PATHS_LIST
1835     ar
1836     arch
1837     as
1838     cc
1839     objcc
1840     cpu
1841     cross_prefix
1842     custom_allocator
1843     dep_cc
1844     env
1845     extra_version
1846     host_cc
1847     host_cflags
1848     host_extralibs
1849     host_ld
1850     host_ldflags
1851     host_os
1852     ignore_tests
1853     ld
1854     logfile
1855     malloc_prefix
1856     nm
1857     optflags
1858     pkg_config
1859     pkg_config_flags
1860     random_seed
1861     samples
1862     sysinclude
1863     sysroot
1864     target_exec
1865     target_os
1866     target_path
1867     target_samples
1868     toolchain
1869     x86asmexe
1870 "
1871
1872 CMDLINE_APPEND="
1873     extra_cflags
1874     extra_objcflags
1875     host_cppflags
1876 "
1877
1878 # code dependency declarations
1879
1880 # architecture extensions
1881
1882 armv5te_deps="arm"
1883 armv6_deps="arm"
1884 armv6t2_deps="arm"
1885 armv8_deps="aarch64"
1886 neon_deps_any="aarch64 arm"
1887 intrinsics_neon_deps="neon"
1888 vfp_deps_any="aarch64 arm"
1889 vfpv3_deps="vfp"
1890
1891 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1892
1893 altivec_deps="ppc"
1894 ppc4xx_deps="ppc"
1895 vsx_deps="altivec"
1896 power8_deps="vsx"
1897
1898 cpunop_deps="i686"
1899 x86_64_select="i686"
1900 x86_64_suggest="fast_cmov"
1901
1902 amd3dnow_deps="mmx"
1903 amd3dnowext_deps="amd3dnow"
1904 i686_deps="x86"
1905 mmx_deps="x86"
1906 mmxext_deps="mmx"
1907 sse_deps="mmxext"
1908 sse2_deps="sse"
1909 sse3_deps="sse2"
1910 ssse3_deps="sse3"
1911 sse4_deps="ssse3"
1912 sse42_deps="sse4"
1913 avx_deps="sse42"
1914 xop_deps="avx"
1915 fma3_deps="avx"
1916 fma4_deps="avx"
1917 avx2_deps="avx"
1918
1919 mmx_external_deps="x86asm"
1920 mmx_inline_deps="inline_asm"
1921 mmx_suggest="mmx_external mmx_inline"
1922
1923 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1924     eval dep=\$${ext}_deps
1925     eval ${ext}_external_deps='"${dep}_external"'
1926     eval ${ext}_inline_deps='"${dep}_inline"'
1927     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1928 done
1929
1930 aligned_stack_if_any="aarch64 ppc x86"
1931 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1932 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1933 fast_unaligned_if_any="aarch64 ppc x86"
1934 simd_align_16_if_any="altivec neon sse"
1935 simd_align_32_if_any="avx"
1936
1937 # system capabilities
1938 symver_if_any="symver_asm_label symver_gnu_asm"
1939 valgrind_backtrace_conflict="optimizations"
1940 valgrind_backtrace_deps="valgrind_valgrind_h"
1941
1942 # threading support
1943 atomics_gcc_if="sync_val_compare_and_swap"
1944 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1945 atomics_win32_if="MemoryBarrier"
1946 atomics_native_if_any="$ATOMICS_LIST"
1947 w32threads_deps="atomics_native"
1948 threads_if_any="$THREADS_LIST"
1949
1950 # subsystems
1951 dct_select="rdft"
1952 dirac_parse_select="golomb"
1953 error_resilience_select="me_cmp"
1954 faandct_deps="faan fdctdsp"
1955 faanidct_deps="faan idctdsp"
1956 h264dsp_select="startcode"
1957 hevc_ps_select="golomb"
1958 intrax8_select="blockdsp idctdsp"
1959 mdct_select="fft"
1960 rdft_select="fft"
1961 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1962 mpeg_er_select="error_resilience"
1963 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1964 mpegaudiodsp_select="dct"
1965 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1966 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1967 vc1dsp_select="h264chroma qpeldsp startcode"
1968
1969 # decoders / encoders
1970 aac_decoder_select="imdct15 mdct sinewin"
1971 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1972 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1973 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1974 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1975 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1976 adpcm_g722_decoder_select="g722dsp"
1977 adpcm_g722_encoder_select="g722dsp"
1978 aic_decoder_select="golomb idctdsp"
1979 alac_encoder_select="lpc"
1980 als_decoder_select="bswapdsp"
1981 amrnb_decoder_select="lsp"
1982 amrwb_decoder_select="lsp"
1983 amv_decoder_select="sp5x_decoder"
1984 ape_decoder_select="bswapdsp"
1985 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1986 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1987 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1988 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1989 atrac1_decoder_select="mdct sinewin"
1990 atrac3_decoder_select="mdct"
1991 atrac3p_decoder_select="mdct sinewin"
1992 bink_decoder_select="blockdsp hpeldsp"
1993 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1994 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1995 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1996 cllc_decoder_select="bswapdsp"
1997 comfortnoise_encoder_select="lpc"
1998 cook_decoder_select="audiodsp mdct sinewin"
1999 cscd_decoder_select="lzo"
2000 cscd_decoder_suggest="zlib"
2001 dca_decoder_select="fmtconvert mdct"
2002 dds_decoder_select="texturedsp"
2003 dnxhd_decoder_select="blockdsp idctdsp"
2004 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
2005 dvvideo_decoder_select="dvprofile idctdsp"
2006 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
2007 dxa_decoder_deps="zlib"
2008 dxv_decoder_select="lzf texturedsp"
2009 eac3_decoder_select="ac3_decoder"
2010 eac3_encoder_select="ac3_encoder"
2011 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
2012 eatgq_decoder_select="aandcttables idctdsp"
2013 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
2014 exr_decoder_deps="zlib"
2015 ffv1_decoder_select="rangecoder"
2016 ffv1_encoder_select="rangecoder"
2017 ffvhuff_decoder_select="huffyuv_decoder"
2018 ffvhuff_encoder_select="huffyuv_encoder"
2019 fic_decoder_select="golomb"
2020 flac_decoder_select="flacdsp"
2021 flac_encoder_select="bswapdsp flacdsp lpc"
2022 flashsv_decoder_deps="zlib"
2023 flashsv_encoder_deps="zlib"
2024 flashsv2_decoder_deps="zlib"
2025 flv_decoder_select="h263_decoder"
2026 flv_encoder_select="h263_encoder"
2027 fourxm_decoder_select="blockdsp bswapdsp"
2028 fraps_decoder_select="bswapdsp huffman"
2029 g2m_decoder_deps="zlib"
2030 g2m_decoder_select="blockdsp idctdsp jpegtables"
2031 h261_decoder_select="mpeg_er mpegvideo"
2032 h261_encoder_select="aandcttables mpegvideoenc"
2033 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2034 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2035 h263i_decoder_select="h263_decoder"
2036 h263p_encoder_select="h263_encoder"
2037 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2038 h264_decoder_suggest="error_resilience"
2039 hap_decoder_select="snappy texturedsp"
2040 hap_encoder_deps="libsnappy"
2041 hap_encoder_select="texturedspenc"
2042 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2043 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2044 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2045 iac_decoder_select="imc_decoder"
2046 imc_decoder_select="bswapdsp fft mdct sinewin"
2047 indeo3_decoder_select="hpeldsp"
2048 indeo4_decoder_select="ividsp"
2049 indeo5_decoder_select="ividsp"
2050 interplay_video_decoder_select="hpeldsp"
2051 jpegls_decoder_select="mjpeg_decoder"
2052 jv_decoder_select="blockdsp"
2053 lagarith_decoder_select="huffyuvdsp"
2054 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2055 magicyuv_decoder_select="huffyuvdsp"
2056 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2057 metasound_decoder_select="lsp mdct sinewin"
2058 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2059 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2060 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2061 mjpegb_decoder_select="mjpeg_decoder"
2062 mlp_decoder_select="mlp_parser"
2063 motionpixels_decoder_select="bswapdsp"
2064 mp1_decoder_select="mpegaudio"
2065 mp1float_decoder_select="mpegaudio"
2066 mp2_decoder_select="mpegaudio"
2067 mp2float_decoder_select="mpegaudio"
2068 mp3_decoder_select="mpegaudio"
2069 mp3adu_decoder_select="mpegaudio"
2070 mp3adufloat_decoder_select="mpegaudio"
2071 mp3float_decoder_select="mpegaudio"
2072 mp3on4_decoder_select="mpegaudio"
2073 mp3on4float_decoder_select="mpegaudio"
2074 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2075 mpc8_decoder_select="mpegaudiodsp"
2076 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2077 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2078 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2079 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2080 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2081 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2082 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2083 mpeg4_encoder_select="h263_encoder"
2084 msa1_decoder_select="mss34dsp"
2085 msmpeg4v1_decoder_select="h263_decoder"
2086 msmpeg4v2_decoder_select="h263_decoder"
2087 msmpeg4v2_encoder_select="h263_encoder"
2088 msmpeg4v3_decoder_select="h263_decoder"
2089 msmpeg4v3_encoder_select="h263_encoder"
2090 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2091 mts2_decoder_select="mss34dsp"
2092 mxpeg_decoder_select="mjpeg_decoder"
2093 nellymoser_decoder_select="mdct sinewin"
2094 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2095 nuv_decoder_select="idctdsp lzo"
2096 on2avc_decoder_select="mdct"
2097 opus_decoder_deps="avresample"
2098 opus_decoder_select="imdct15"
2099 png_decoder_deps="zlib"
2100 png_encoder_deps="zlib"
2101 png_encoder_select="huffyuvencdsp"
2102 prores_decoder_select="idctdsp"
2103 prores_encoder_select="fdctdsp"
2104 qcelp_decoder_select="lsp"
2105 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2106 ra_144_encoder_select="audio_frame_queue lpc"
2107 ralf_decoder_select="golomb"
2108 rscc_decoder_deps="zlib"
2109 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2110 rv10_encoder_select="h263_encoder"
2111 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2112 rv20_encoder_select="h263_encoder"
2113 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2114 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2115 screenpresso_decoder_deps="zlib"
2116 sipr_decoder_select="lsp"
2117 sp5x_decoder_select="mjpeg_decoder"
2118 svq1_decoder_select="hpeldsp"
2119 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2120 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2121 svq3_decoder_suggest="zlib"
2122 tak_decoder_select="audiodsp"
2123 tdsc_decoder_deps="zlib"
2124 tdsc_decoder_select="mjpeg_decoder"
2125 theora_decoder_select="vp3_decoder"
2126 thp_decoder_select="mjpeg_decoder"
2127 tiff_decoder_suggest="zlib"
2128 tiff_encoder_suggest="zlib"
2129 truehd_decoder_select="mlp_decoder"
2130 truemotion2_decoder_select="bswapdsp"
2131 truespeech_decoder_select="bswapdsp"
2132 tscc_decoder_deps="zlib"
2133 txd_decoder_select="texturedsp"
2134 twinvq_decoder_select="mdct lsp sinewin"
2135 utvideo_decoder_select="bswapdsp"
2136 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2137 vble_decoder_select="huffyuvdsp"
2138 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2139 vc1image_decoder_select="vc1_decoder"
2140 vorbis_decoder_select="mdct"
2141 vorbis_encoder_select="mdct"
2142 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2143 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2144 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2145 vp6a_decoder_select="vp6_decoder"
2146 vp6f_decoder_select="vp6_decoder"
2147 vp7_decoder_select="h264pred videodsp vp8dsp"
2148 vp8_decoder_select="h264pred videodsp vp8dsp"
2149 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2150 webp_decoder_select="vp8_decoder"
2151 wmapro_decoder_select="mdct sinewin wma_freqs"
2152 wmav1_decoder_select="mdct sinewin wma_freqs"
2153 wmav1_encoder_select="mdct sinewin wma_freqs"
2154 wmav2_decoder_select="mdct sinewin wma_freqs"
2155 wmav2_encoder_select="mdct sinewin wma_freqs"
2156 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2157 wmv1_decoder_select="h263_decoder"
2158 wmv1_encoder_select="h263_encoder"
2159 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2160 wmv2_encoder_select="h263_encoder wmv2dsp"
2161 wmv3_decoder_select="vc1_decoder"
2162 wmv3image_decoder_select="wmv3_decoder"
2163 zerocodec_decoder_deps="zlib"
2164 zlib_decoder_deps="zlib"
2165 zlib_encoder_deps="zlib"
2166 zmbv_decoder_deps="zlib"
2167 zmbv_encoder_deps="zlib"
2168
2169 # hardware accelerators
2170 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2171 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2172 dxva2_lib_deps="dxva2"
2173 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2174 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2175
2176 h263_vaapi_hwaccel_deps="vaapi"
2177 h263_vaapi_hwaccel_select="h263_decoder"
2178 h264_d3d11va_hwaccel_deps="d3d11va"
2179 h264_d3d11va_hwaccel_select="h264_decoder"
2180 h264_dxva2_hwaccel_deps="dxva2"
2181 h264_dxva2_hwaccel_select="h264_decoder"
2182 h264_mmal_hwaccel_deps="mmal"
2183 h264_qsv_hwaccel_deps="libmfx"
2184 h264_vaapi_hwaccel_deps="vaapi"
2185 h264_vaapi_hwaccel_select="h264_decoder"
2186 h264_vda_hwaccel_deps="vda"
2187 h264_vda_hwaccel_select="h264_decoder"
2188 h264_vda_old_hwaccel_deps="vda"
2189 h264_vda_old_hwaccel_select="h264_decoder"
2190 h264_vdpau_hwaccel_deps="vdpau"
2191 h264_vdpau_hwaccel_select="h264_decoder"
2192 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2193 hevc_d3d11va_hwaccel_select="hevc_decoder"
2194 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2195 hevc_dxva2_hwaccel_select="hevc_decoder"
2196 hevc_qsv_hwaccel_deps="libmfx"
2197 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2198 hevc_vaapi_hwaccel_select="hevc_decoder"
2199 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2200 hevc_vdpau_hwaccel_select="hevc_decoder"
2201 mpeg1_vdpau_hwaccel_deps="vdpau"
2202 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2203 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2204 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2205 mpeg2_dxva2_hwaccel_deps="dxva2"
2206 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2207 mpeg2_mmal_hwaccel_deps="mmal"
2208 mpeg2_qsv_hwaccel_deps="libmfx"
2209 mpeg2_vaapi_hwaccel_deps="vaapi"
2210 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2211 mpeg2_vdpau_hwaccel_deps="vdpau"
2212 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2213 mpeg4_vaapi_hwaccel_deps="vaapi"
2214 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2215 mpeg4_vdpau_hwaccel_deps="vdpau"
2216 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2217 vc1_d3d11va_hwaccel_deps="d3d11va"
2218 vc1_d3d11va_hwaccel_select="vc1_decoder"
2219 vc1_dxva2_hwaccel_deps="dxva2"
2220 vc1_dxva2_hwaccel_select="vc1_decoder"
2221 vc1_mmal_hwaccel_deps="mmal"
2222 vc1_qsv_hwaccel_deps="libmfx"
2223 vc1_vaapi_hwaccel_deps="vaapi"
2224 vc1_vaapi_hwaccel_select="vc1_decoder"
2225 vc1_vdpau_hwaccel_deps="vdpau"
2226 vc1_vdpau_hwaccel_select="vc1_decoder"
2227 vp8_qsv_hwaccel_deps="libmfx"
2228 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2229 vp8_vaapi_hwaccel_select="vp8_decoder"
2230 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2231 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2232 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2233 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2234
2235 # hardware-accelerated codecs
2236 nvenc_deps_any="libdl LoadLibrary"
2237 omx_deps="libdl pthreads"
2238 omx_rpi_select="omx"
2239 qsvdec_select="qsv"
2240 qsvenc_select="qsv"
2241 vaapi_encode_deps="vaapi"
2242
2243 hwupload_cuda_filter_deps="cuda"
2244 scale_npp_filter_deps="cuda libnpp"
2245
2246 h264_mmal_decoder_deps="mmal"
2247 h264_nvenc_encoder_deps="nvenc"
2248 h264_omx_encoder_deps="omx"
2249 h264_qsv_decoder_deps="libmfx"
2250 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2251 h264_qsv_encoder_deps="libmfx"
2252 h264_qsv_encoder_select="qsvenc"
2253 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2254 h264_vaapi_encoder_select="vaapi_encode golomb"
2255 hevc_nvenc_encoder_deps="nvenc"
2256 hevc_qsv_decoder_deps="libmfx"
2257 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2258 hevc_qsv_encoder_deps="libmfx"
2259 hevc_qsv_encoder_select="hevc_ps qsvenc"
2260 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2261 hevc_vaapi_encoder_select="vaapi_encode golomb"
2262 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2263 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2264 mpeg2_mmal_decoder_deps="mmal"
2265 mpeg2_qsv_decoder_deps="libmfx"
2266 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2267 mpeg2_qsv_encoder_deps="libmfx"
2268 mpeg2_qsv_encoder_select="qsvenc"
2269 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2270 mpeg2_vaapi_encoder_select="vaapi_encode"
2271 mpeg4_omx_encoder_deps="omx"
2272 vc1_mmal_decoder_deps="mmal"
2273 vc1_qsv_decoder_deps="libmfx"
2274 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2275 vp8_qsv_decoder_deps="libmfx"
2276 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2277 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
2278 vp8_vaapi_encoder_select="vaapi_encode"
2279
2280 nvenc_h264_encoder_select="h264_nvenc_encoder"
2281 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2282
2283 # parsers
2284 h264_parser_select="golomb h264dsp h264parse"
2285 hevc_parser_select="hevc_ps"
2286 mpegaudio_parser_select="mpegaudioheader"
2287 mpegvideo_parser_select="mpegvideo"
2288 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2289 vc1_parser_select="vc1dsp"
2290
2291 # bitstream_filters
2292 mjpeg2jpeg_bsf_select="jpegtables"
2293
2294 # external libraries
2295 avisynth_deps="LoadLibrary"
2296 avxsynth_deps="libdl"
2297 avisynth_demuxer_deps_any="avisynth avxsynth"
2298 avisynth_demuxer_select="riffdec"
2299 libdcadec_decoder_deps="libdcadec"
2300 libfaac_encoder_deps="libfaac"
2301 libfaac_encoder_select="audio_frame_queue"
2302 libfdk_aac_decoder_deps="libfdk_aac"
2303 libfdk_aac_encoder_deps="libfdk_aac"
2304 libfdk_aac_encoder_select="audio_frame_queue"
2305 libgsm_decoder_deps="libgsm"
2306 libgsm_encoder_deps="libgsm"
2307 libgsm_ms_decoder_deps="libgsm"
2308 libgsm_ms_encoder_deps="libgsm"
2309 libilbc_decoder_deps="libilbc"
2310 libilbc_encoder_deps="libilbc"
2311 libkvazaar_encoder_deps="libkvazaar"
2312 libmp3lame_encoder_deps="libmp3lame"
2313 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2314 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2315 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2316 libopencore_amrnb_encoder_select="audio_frame_queue"
2317 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2318 libopenh264_decoder_deps="libopenh264"
2319 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2320 libopenh264_encoder_deps="libopenh264"
2321 libopenjpeg_decoder_deps="libopenjpeg"
2322 libopenjpeg_encoder_deps="libopenjpeg"
2323 libopus_decoder_deps="libopus"
2324 libopus_encoder_deps="libopus"
2325 libopus_encoder_select="audio_frame_queue"
2326 libschroedinger_decoder_deps="libschroedinger"
2327 libschroedinger_encoder_deps="libschroedinger"
2328 libspeex_decoder_deps="libspeex"
2329 libspeex_encoder_deps="libspeex"
2330 libspeex_encoder_select="audio_frame_queue"
2331 libtheora_encoder_deps="libtheora"
2332 libtwolame_encoder_deps="libtwolame"
2333 libvo_aacenc_encoder_deps="libvo_aacenc"
2334 libvo_aacenc_encoder_select="audio_frame_queue"
2335 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2336 libvorbis_encoder_deps="libvorbis"
2337 libvorbis_encoder_select="audio_frame_queue"
2338 libvpx_vp8_decoder_deps="libvpx"
2339 libvpx_vp8_encoder_deps="libvpx"
2340 libvpx_vp9_decoder_deps="libvpx"
2341 libvpx_vp9_encoder_deps="libvpx"
2342 libwavpack_encoder_deps="libwavpack"
2343 libwavpack_encoder_select="audio_frame_queue"
2344 libwebp_encoder_deps="libwebp"
2345 libx262_encoder_deps="libx262"
2346 libx264_encoder_deps="libx264"
2347 libx265_encoder_deps="libx265"
2348 libxavs_encoder_deps="libxavs"
2349 libxvid_encoder_deps="libxvid mkstemp"
2350
2351 # demuxers / muxers
2352 ac3_demuxer_select="ac3_parser"
2353 asf_demuxer_select="riffdec"
2354 asf_muxer_select="riffenc"
2355 asf_stream_muxer_select="asf_muxer"
2356 avi_demuxer_select="iso_media riffdec"
2357 avi_muxer_select="riffenc"
2358 caf_demuxer_select="iso_media riffdec"
2359 dash_muxer_select="mp4_muxer"
2360 dirac_demuxer_select="dirac_parser"
2361 dv_demuxer_select="dvprofile"
2362 dv_muxer_select="dvprofile"
2363 dxa_demuxer_select="riffdec"
2364 eac3_demuxer_select="ac3_parser"
2365 f4v_muxer_select="mov_muxer"
2366 flac_demuxer_select="flac_parser"
2367 hds_muxer_select="flv_muxer"
2368 hls_muxer_select="mpegts_muxer"
2369 ipod_muxer_select="mov_muxer"
2370 ismv_muxer_select="mov_muxer"
2371 matroska_audio_muxer_select="matroska_muxer"
2372 matroska_demuxer_select="iso_media riffdec"
2373 matroska_demuxer_suggest="bzlib lzo zlib"
2374 matroska_muxer_select="iso_media riffenc"
2375 mmf_muxer_select="riffenc"
2376 mov_demuxer_select="iso_media riffdec"
2377 mov_demuxer_suggest="zlib"
2378 mov_muxer_select="iso_media riffenc rtpenc_chain"
2379 mp3_demuxer_select="mpegaudio_parser"
2380 mp3_muxer_select="mpegaudioheader"
2381 mp4_muxer_select="mov_muxer"
2382 mpegts_demuxer_select="iso_media"
2383 mpegts_muxer_select="adts_muxer latm_muxer"
2384 mpegtsraw_demuxer_select="mpegts_demuxer"
2385 mxf_d10_muxer_select="mxf_muxer"
2386 nut_muxer_select="riffenc"
2387 nuv_demuxer_select="riffdec"
2388 oga_muxer_select="ogg_muxer"
2389 ogg_demuxer_select="dirac_parse"
2390 opus_muxer_select="ogg_muxer"
2391 psp_muxer_select="mov_muxer"
2392 rtp_demuxer_select="sdp_demuxer"
2393 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2394 rtsp_demuxer_select="http_protocol rtpdec"
2395 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2396 sap_demuxer_select="sdp_demuxer"
2397 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2398 sdp_demuxer_select="rtpdec"
2399 smoothstreaming_muxer_select="ismv_muxer"
2400 spdif_muxer_select="aac_parser"
2401 spx_muxer_select="ogg_muxer"
2402 swf_demuxer_suggest="zlib"
2403 tak_demuxer_select="tak_parser"
2404 tg2_muxer_select="mov_muxer"
2405 tgp_muxer_select="mov_muxer"
2406 w64_demuxer_select="wav_demuxer"
2407 wav_demuxer_select="riffdec"
2408 wav_muxer_select="riffenc"
2409 webm_muxer_select="iso_media riffenc"
2410 wtv_demuxer_select="mpegts_demuxer riffdec"
2411 xmv_demuxer_select="riffdec"
2412 xwma_demuxer_select="riffdec"
2413
2414 # indevs / outdevs
2415 alsa_indev_deps="alsa"
2416 alsa_outdev_deps="alsa"
2417 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2418 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2419 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2420 dv1394_indev_deps="dv1394"
2421 dv1394_indev_select="dv_demuxer"
2422 fbdev_indev_deps="linux_fb_h"
2423 jack_indev_deps="libjack"
2424 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2425 libcdio_indev_deps="libcdio"
2426 libdc1394_indev_deps="libdc1394"
2427 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2428 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2429 pulse_indev_deps="libpulse"
2430 sndio_indev_deps="sndio"
2431 sndio_outdev_deps="sndio"
2432 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2433 vfwcap_indev_deps="vfw32 vfwcap_defines"
2434 xcbgrab_indev_deps="libxcb libxcb_shape"
2435 xcbgrab_indev_suggest="libxcb_shm libxcb_xfixes"
2436
2437 # protocols
2438 ffrtmpcrypt_protocol_conflict="librtmp_protocol"
2439 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2440 ffrtmpcrypt_protocol_select="tcp_protocol"
2441 ffrtmphttp_protocol_conflict="librtmp_protocol"
2442 ffrtmphttp_protocol_select="http_protocol"
2443 gopher_protocol_select="network"
2444 http_protocol_select="tcp_protocol"
2445 httpproxy_protocol_select="tcp_protocol"
2446 https_protocol_select="tls_protocol"
2447 icecast_protocol_select="http_protocol"
2448 librtmp_protocol_deps="librtmp"
2449 librtmpe_protocol_deps="librtmp"
2450 librtmps_protocol_deps="librtmp"
2451 librtmpt_protocol_deps="librtmp"
2452 librtmpte_protocol_deps="librtmp"
2453 mmsh_protocol_select="http_protocol"
2454 mmst_protocol_select="network"
2455 rtmp_protocol_conflict="librtmp_protocol"
2456 rtmp_protocol_select="tcp_protocol"
2457 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2458 rtmps_protocol_conflict="librtmp_protocol"
2459 rtmps_protocol_select="tls_protocol"
2460 rtmpt_protocol_select="ffrtmphttp_protocol"
2461 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2462 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2463 rtp_protocol_select="udp_protocol"
2464 sctp_protocol_deps="struct_sctp_event_subscribe"
2465 sctp_protocol_select="network"
2466 srtp_protocol_select="rtp_protocol srtp"
2467 tcp_protocol_select="network"
2468 tls_gnutls_protocol_deps="gnutls"
2469 tls_gnutls_protocol_select="tcp_protocol"
2470 tls_openssl_protocol_conflict="tls_gnutls_protocol"
2471 tls_openssl_protocol_deps="openssl"
2472 tls_openssl_protocol_select="tcp_protocol"
2473 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2474 udp_protocol_select="network"
2475 unix_protocol_deps="sys_un_h"
2476 unix_protocol_select="network"
2477
2478 # filters
2479 asyncts_filter_deps="avresample"
2480 blackframe_filter_deps="gpl"
2481 boxblur_filter_deps="gpl"
2482 bs2b_filter_deps="libbs2b"
2483 cropdetect_filter_deps="gpl"
2484 deinterlace_qsv_filter_deps="libmfx"
2485 deinterlace_vaapi_filter_deps="vaapi"
2486 delogo_filter_deps="gpl"
2487 drawtext_filter_deps="libfreetype"
2488 drawtext_filter_suggest="libfontconfig"
2489 frei0r_filter_deps="frei0r libdl"
2490 frei0r_src_filter_deps="frei0r libdl"
2491 hdcd_filter_deps="libhdcd"
2492 hqdn3d_filter_deps="gpl"
2493 interlace_filter_deps="gpl"
2494 movie_filter_deps="avcodec avformat"
2495 ocv_filter_deps="libopencv"
2496 resample_filter_deps="avresample"
2497 scale_filter_deps="swscale"
2498 scale_qsv_filter_deps="libmfx"
2499 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2500
2501 # examples
2502 decode_audio_example_deps="avcodec avutil"
2503 decode_video_example_deps="avcodec avutil"
2504 encode_audio_example_deps="avcodec avutil"
2505 encode_video_example_deps="avcodec avutil"
2506 filter_audio_example_deps="avfilter avutil"
2507 metadata_example_deps="avformat avutil"
2508 output_example_deps="avcodec avformat avresample avutil swscale"
2509 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2510 transcode_aac_example_deps="avcodec avformat avresample"
2511
2512 # EXTRALIBS_LIST
2513 cpu_init_extralibs="pthreads_extralibs"
2514 cws2fws_extralibs="zlib_extralibs"
2515
2516 # libraries, in linking order
2517 avcodec_deps="avutil"
2518 avcodec_select="null_bsf"
2519 avdevice_deps="avformat avcodec avutil"
2520 avfilter_deps="avutil"
2521 avformat_deps="avcodec avutil"
2522 avformat_suggest="network"
2523 avresample_deps="avutil"
2524 swscale_deps="avutil"
2525
2526 avcodec_extralibs="pthreads_extralibs libm_extralibs"
2527 avdevice_extralibs="libm_extralibs"
2528 avformat_extralibs="libm_extralibs"
2529 avfilter_extralibs="pthreads_extralibs libm_extralibs"
2530 avresample_extralibs="libm_extralibs"
2531 avutil_extralibs="clock_gettime_extralibs cuda_extralibs libm_extralibs libmfx_extralibs nanosleep_extralibs pthreads_extralibs user32_extralibs vaapi_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vdpau_x11_extralibs wincrypt_extralibs"
2532 swscale_extralibs="libm_extralibs"
2533
2534 # programs
2535 avconv_deps="avcodec avfilter avformat avresample swscale"
2536 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2537                fps_filter null_filter resample_filter scale_filter
2538                trim_filter"
2539 avconv_suggest="dxva2_lib ole32 psapi shell32"
2540 avplay_deps="avcodec avfilter avformat avresample sdl"
2541 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2542 avplay_suggest="shell32"
2543 avprobe_deps="avcodec avformat"
2544 avprobe_suggest="shell32"
2545
2546 # documentation
2547 pod2man_deps="doc"
2548 texi2html_deps="doc"
2549
2550 # default parameters
2551
2552 logfile="avbuild/config.log"
2553
2554 # installation paths
2555 prefix_default="/usr/local"
2556 bindir_default='${prefix}/bin'
2557 datadir_default='${prefix}/share/avconv'
2558 docdir_default='${prefix}/share/doc/libav'
2559 incdir_default='${prefix}/include'
2560 libdir_default='${prefix}/lib'
2561 mandir_default='${prefix}/share/man'
2562 shlibdir_default="$libdir_default"
2563
2564 # toolchain
2565 ar_default="ar"
2566 cc_default="gcc"
2567 host_cc_default="gcc"
2568 x86asmexe_default="nasm"
2569 ln_s="ln -s -f"
2570 nm_default="nm -g"
2571 pkg_config_default=pkg-config
2572 ranlib="ranlib"
2573 strip="strip"
2574 version_script='--version-script'
2575
2576 # machine
2577 arch_default=$(uname -m)
2578 cpu="generic"
2579 intrinsics="none"
2580
2581 # OS
2582 target_os_default=$(tolower $(uname -s))
2583 host_os=$target_os_default
2584
2585 # configurable options
2586 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2587
2588 enable asm
2589 enable debug
2590 enable doc
2591 enable faan faandct faanidct
2592 enable optimizations
2593 enable safe_bitstream_reader
2594 enable static
2595 enable swscale_alpha
2596 enable valgrind_backtrace
2597
2598 # By default, enable only those hwaccels that have no external dependencies.
2599 enable d3d11va dxva2 vda vdpau
2600
2601 # internal components are enabled by default
2602 enable $EXTRALIBS_LIST
2603
2604 # Avoid external, non-system, libraries getting enabled by dependency resolution
2605 disable $EXTERNAL_LIBRARY_LIST
2606
2607 # build settings
2608 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2609 LIBPREF="lib"
2610 LIBSUF=".a"
2611 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2612 SLIBPREF="lib"
2613 SLIBSUF=".so"
2614 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2615 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2616 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2617 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2618 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2619 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2620 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2621
2622 asflags_filter=echo
2623 cflags_filter=echo
2624 ldflags_filter=echo
2625
2626 AS_C='-c'
2627 AS_O='-o $@'
2628 CC_C='-c'
2629 CC_E='-E -o $@'
2630 CC_O='-o $@'
2631 OBJCC_C='-c'
2632 OBJCC_E='-E -o $@'
2633 OBJCC_O='-o $@'
2634 X86ASM_O='-o $@'
2635 LD_O='-o $@'
2636 LD_LIB='-l%'
2637 LD_PATH='-L'
2638 HOSTCC_C='-c'
2639 HOSTCC_E='-E -o $@'
2640 HOSTCC_O='-o $@'
2641 HOSTLD_O='-o $@'
2642
2643 host_extralibs='-lm'
2644 host_cflags_filter=echo
2645 host_ldflags_filter=echo
2646
2647 target_path='$(CURDIR)'
2648
2649 # since the object filename is not given with the -MM flag, the compiler
2650 # is only able to print the basename, and we must add the path ourselves
2651 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2652 DEPFLAGS='-MM'
2653
2654 mkdir -p avbuild
2655
2656 # find source path
2657 if test -f configure; then
2658     source_path=.
2659 else
2660     source_path=$(cd $(dirname "$0"); pwd)
2661     echo "$source_path" | grep -q '[[:blank:]]' &&
2662         die "Out of tree builds are impossible with whitespace in source path."
2663     test -e "$source_path/config.h" &&
2664         die "Out of tree builds are impossible with config.h in source dir."
2665 fi
2666
2667 for v in "$@"; do
2668     r=${v#*=}
2669     l=${v%"$r"}
2670     r=$(sh_quote "$r")
2671     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2672 done
2673
2674 find_things(){
2675     thing=$1
2676     pattern=$2
2677     file=$source_path/$3
2678     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2679 }
2680
2681 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2682 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2683 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2684 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2685 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2686 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2687 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2688 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2689 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2690
2691 find_things_extern(){
2692     thing=$1
2693     pattern=$2
2694     file=$source_path/$3
2695     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2696 }
2697
2698 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2699 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2700
2701 AVCODEC_COMPONENTS_LIST="
2702     $BSF_LIST
2703     $DECODER_LIST
2704     $ENCODER_LIST
2705     $HWACCEL_LIST
2706     $PARSER_LIST
2707 "
2708
2709 AVDEVICE_COMPONENTS_LIST="
2710     $INDEV_LIST
2711     $OUTDEV_LIST
2712 "
2713
2714 AVFILTER_COMPONENTS_LIST="
2715     $FILTER_LIST
2716 "
2717
2718 AVFORMAT_COMPONENTS_LIST="
2719     $DEMUXER_LIST
2720     $MUXER_LIST
2721     $PROTOCOL_LIST
2722 "
2723
2724 ALL_COMPONENTS="
2725     $AVCODEC_COMPONENTS_LIST
2726     $AVDEVICE_COMPONENTS_LIST
2727     $AVFILTER_COMPONENTS_LIST
2728     $AVFORMAT_COMPONENTS_LIST
2729 "
2730
2731 for n in $COMPONENT_LIST; do
2732     v=$(toupper ${n%s})_LIST
2733     eval enable \$$v
2734     eval ${n}_if_any="\$$v"
2735 done
2736
2737 enable $ARCH_EXT_LIST
2738
2739 die_unknown(){
2740     echo "Unknown option \"$1\"."
2741     echo "See $0 --help for available options."
2742     exit 1
2743 }
2744
2745 print_3_columns() {
2746     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2747 }
2748
2749 show_list() {
2750     suffix=_$1
2751     shift
2752     echo $* | sed s/$suffix//g | print_3_columns
2753     exit 0
2754 }
2755
2756 rand_list(){
2757     IFS=', '
2758     set -- $*
2759     unset IFS
2760     for thing; do
2761         comp=${thing%:*}
2762         prob=${thing#$comp}
2763         prob=${prob#:}
2764         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2765         echo "prob ${prob:-0.5}"
2766         printf '%s\n' $comp
2767     done
2768 }
2769
2770 do_random(){
2771     action=$1
2772     shift
2773     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2774     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2775 }
2776
2777 for opt do
2778     optval="${opt#*=}"
2779     case "$opt" in
2780         --extra-ldflags=*)
2781             add_ldflags $optval
2782         ;;
2783         --extra-ldexeflags=*)
2784             add_ldexeflags $optval
2785         ;;
2786         --extra-libs=*)
2787             add_extralibs $optval
2788         ;;
2789         --disable-devices)
2790             disable $INDEV_LIST $OUTDEV_LIST
2791         ;;
2792         --enable-debug=*)
2793             debuglevel="$optval"
2794         ;;
2795         --disable-programs)
2796             disable $PROGRAM_LIST
2797         ;;
2798         --disable-everything)
2799             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2800         ;;
2801         --disable-all)
2802             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2803             disable $LIBRARY_LIST $PROGRAM_LIST doc
2804         ;;
2805         --enable-random|--disable-random)
2806             action=${opt%%-random}
2807             do_random ${action#--} $COMPONENT_LIST
2808         ;;
2809         --enable-random=*|--disable-random=*)
2810             action=${opt%%-random=*}
2811             do_random ${action#--} $optval
2812         ;;
2813         --enable-*=*|--disable-*=*)
2814             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2815             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2816             eval list=\$$(toupper $thing)_LIST
2817             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2818             $action $(filter "$name" $list)
2819         ;;
2820         --enable-avserver|--disable-avserver*)
2821             warn "avserver has been removed, the ${opt} option is only"\
2822                  "provided for compatibility and will be removed in the future"
2823         ;;
2824         --enable-yasm|--disable-yasm)
2825             warn "The ${opt} option is only provided for compatibility and will be\n"\
2826                  "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
2827             test $opt = --enable-yasm && x86asm=yes || x86asm=no
2828         ;;
2829         --enable-?*|--disable-?*)
2830             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2831             if is_in $option $COMPONENT_LIST; then
2832                 test $action = disable && action=unset
2833                 eval $action \$$(toupper ${option%s})_LIST
2834             elif is_in $option $CMDLINE_SELECT; then
2835                 $action $option
2836             else
2837                 die_unknown $opt
2838             fi
2839         ;;
2840         --list-*)
2841             NAME="${opt#--list-}"
2842             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2843             NAME=${NAME%s}
2844             eval show_list $NAME \$$(toupper $NAME)_LIST
2845         ;;
2846         --help|-h) show_help
2847         ;;
2848         --quiet|-q) quiet=yes
2849         ;;
2850         *)
2851             optname="${opt%%=*}"
2852             optname="${optname#--}"
2853             optname=$(echo "$optname" | sed 's/-/_/g')
2854             if is_in $optname $CMDLINE_SET; then
2855                 eval $optname='$optval'
2856             elif is_in $optname $CMDLINE_APPEND; then
2857                 append $optname "$optval"
2858             else
2859                 die_unknown $opt
2860             fi
2861         ;;
2862     esac
2863 done
2864
2865 for e in $env; do
2866     eval "export $e"
2867 done
2868
2869 disabled logging && logfile=/dev/null
2870
2871 # Die early if licensing-related configure options are incompatible.
2872 die_license_disabled() {
2873     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2874 }
2875
2876 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2877 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2878 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2879
2880 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2881
2882 # Disable all the library-specific components if the library itself
2883 # is disabled, see AVCODEC_LIST and following _LIST variables.
2884
2885 disable_components(){
2886     disabled ${1} && disable $(
2887         eval components="\$$(toupper ${1})_COMPONENTS"
2888         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2889     )
2890 }
2891
2892 map 'disable_components $v' $LIBRARY_LIST
2893
2894 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2895 set >> $logfile
2896
2897 case "$toolchain" in
2898     *-asan)
2899         cc_default="${toolchain%-asan}"
2900         add_cflags  -fsanitize=address
2901         add_ldflags -fsanitize=address
2902     ;;
2903     *-msan)
2904         cc_default="${toolchain%-msan}"
2905         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2906         add_ldflags -fsanitize=memory
2907     ;;
2908     *-tsan)
2909         cc_default="${toolchain%-tsan}"
2910         add_cflags  -fsanitize=thread -fPIE
2911         add_ldflags -fsanitize=thread -pie
2912         case "$toolchain" in
2913             gcc-tsan)
2914                 add_cflags  -fPIC
2915                 add_ldflags -fPIC
2916                 ;;
2917         esac
2918     ;;
2919     *-usan)
2920         cc_default="${toolchain%-usan}"
2921         add_cflags  -fsanitize=undefined
2922         add_ldflags -fsanitize=undefined
2923         case "$toolchain" in
2924             clang-usan)
2925                 add_cflags -O1
2926                 ;;
2927         esac
2928     ;;
2929     valgrind-*)
2930         target_exec_default="valgrind"
2931         case "$toolchain" in
2932             valgrind-massif)
2933                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2934                 ;;
2935             valgrind-memcheck)
2936                 target_exec_args="--track-origins=yes --leak-check=full"
2937                 ;;
2938         esac
2939     ;;
2940     msvc)
2941         # Check whether the current MSVC version needs the C99 converter.
2942         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2943         # support enough of C99 to build libav. Default to the new
2944         # behaviour if the regexp was unable to match anything, since this
2945         # successfully parses the version number of existing supported
2946         # versions that require the converter (MSVC 2010 and 2012).
2947         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2948         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2949             cc_default="cl"
2950         else
2951             cc_default="c99wrap cl"
2952         fi
2953         ld_default="$source_path/compat/windows/mslink"
2954         nm_default="dumpbin -symbols"
2955         ar_default="lib"
2956         case "$arch" in
2957         arm*)
2958             as_default="armasm"
2959             ;;
2960         esac
2961         target_os_default="win32"
2962         # Use a relative path for TMPDIR. This makes sure all the
2963         # ffconf temp files are written with a relative path, avoiding
2964         # issues with msys/win32 path conversion for MSVC parameters
2965         # such as -Fo<file> or -out:<file>.
2966         TMPDIR=.
2967     ;;
2968     icl)
2969         cc_default="icl"
2970         ld_default="xilink"
2971         nm_default="dumpbin -symbols"
2972         ar_default="xilib"
2973         target_os_default="win32"
2974         TMPDIR=.
2975     ;;
2976     gcov)
2977         add_cflags  -fprofile-arcs -ftest-coverage
2978         add_ldflags -fprofile-arcs -ftest-coverage
2979     ;;
2980     llvm-cov)
2981         add_cflags -fprofile-arcs -ftest-coverage
2982         add_ldflags --coverage
2983     ;;
2984     hardened)
2985         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2986         add_cflags   -fno-strict-overflow -fstack-protector-all
2987         add_ldflags  -Wl,-z,relro -Wl,-z,now
2988     ;;
2989     ?*)
2990         die "Unknown toolchain $toolchain"
2991     ;;
2992 esac
2993
2994 test -n "$cross_prefix" && enable cross_compile
2995
2996 if enabled cross_compile; then
2997     test -n "$arch" && test -n "$target_os" ||
2998         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2999 fi
3000
3001 ar_default="${cross_prefix}${ar_default}"
3002 cc_default="${cross_prefix}${cc_default}"
3003 objcc_default="${cross_prefix}${objcc_default}"
3004 x86asmexe_default="${cross_prefix}${x86asmexe_default}"
3005 nm_default="${cross_prefix}${nm_default}"
3006 pkg_config_default="${cross_prefix}${pkg_config_default}"
3007 ranlib="${cross_prefix}${ranlib}"
3008 strip="${cross_prefix}${strip}"
3009
3010 sysinclude_default="${sysroot}/usr/include"
3011
3012 set_default arch cc pkg_config sysinclude target_exec target_os x86asmexe
3013 enabled cross_compile || host_cc_default=$cc
3014 set_default host_cc
3015
3016 if ! $pkg_config --version >/dev/null 2>&1; then
3017     warn "$pkg_config not found, library detection may fail."
3018     pkg_config=false
3019 fi
3020
3021 exesuf() {
3022     case $1 in
3023         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
3024     esac
3025 }
3026
3027 EXESUF=$(exesuf $target_os)
3028 HOSTEXESUF=$(exesuf $host_os)
3029
3030 # set temporary file name
3031 : ${TMPDIR:=$TEMPDIR}
3032 : ${TMPDIR:=$TMP}
3033 : ${TMPDIR:=/tmp}
3034
3035 if ! check_cmd mktemp -u XXXXXX; then
3036     # simple replacement for missing mktemp
3037     # NOT SAFE FOR GENERAL USE
3038     mktemp(){
3039         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
3040         echo "$tmpname"
3041         mkdir "$tmpname"
3042     }
3043 fi
3044
3045 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
3046     die "Unable to create temporary directory in $TMPDIR."
3047
3048 tmpfile(){
3049     tmp="${AVTMPDIR}/test"$2
3050     (set -C; exec > $tmp) 2> /dev/null ||
3051         die "Unable to create temporary file in $AVTMPDIR."
3052     eval $1=$tmp
3053 }
3054
3055 trap 'rm -rf -- "$AVTMPDIR"' EXIT
3056 trap 'exit 2' INT
3057
3058 tmpfile TMPASM .asm
3059 tmpfile TMPC   .c
3060 tmpfile TMPE   $EXESUF
3061 tmpfile TMPH   .h
3062 tmpfile TMPO   .o
3063 tmpfile TMPS   .S
3064 tmpfile TMPSH  .sh
3065 tmpfile TMPV   .ver
3066
3067 unset -f mktemp
3068
3069 chmod +x $TMPE
3070
3071 # make sure we can execute files in $TMPDIR
3072 cat > $TMPSH 2>> $logfile <<EOF
3073 #! /bin/sh
3074 EOF
3075 chmod +x $TMPSH >> $logfile 2>&1
3076 if ! $TMPSH >> $logfile 2>&1; then
3077     cat <<EOF
3078 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3079 variable to another directory and make sure that it is not mounted noexec.
3080 EOF
3081     die "Sanity test failed."
3082 fi
3083
3084 armasm_flags(){
3085     for flag; do
3086         case $flag in
3087             # Filter out MSVC cl.exe options from cflags that shouldn't
3088             # be passed to gas-preprocessor
3089             -M[TD]*)                                            ;;
3090             *)                  echo $flag                      ;;
3091         esac
3092    done
3093 }
3094
3095 ccc_flags(){
3096     for flag; do
3097         case $flag in
3098             -std=c99)           echo -c99                       ;;
3099             -mcpu=*)            echo -arch ${flag#*=}           ;;
3100             -mieee)             echo -ieee                      ;;
3101             -O*|-fast)          echo $flag                      ;;
3102             -fno-math-errno)    echo -assume nomath_errno       ;;
3103             -g)                 echo -g3                        ;;
3104             -Wall)              echo -msg_enable level2         ;;
3105             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3106             -Wl,*)              echo $flag                      ;;
3107             -f*|-W*)                                            ;;
3108             *)                  echo $flag                      ;;
3109         esac
3110    done
3111 }
3112
3113 cparser_flags(){
3114     for flag; do
3115         case $flag in
3116             -Wno-switch)             echo -Wno-switch-enum ;;
3117             -Wno-format-zero-length) ;;
3118             -Wdisabled-optimization) ;;
3119             -Wno-pointer-sign)       echo -Wno-other ;;
3120             *)                       echo $flag ;;
3121         esac
3122     done
3123 }
3124
3125 msvc_common_flags(){
3126     for flag; do
3127         case $flag in
3128             # In addition to specifying certain flags under the compiler
3129             # specific filters, they must be specified here as well or else the
3130             # generic catch all at the bottom will print the original flag.
3131             -Wall)                ;;
3132             -Wextra)              ;;
3133             -std=c99)             ;;
3134             # Common flags
3135             -fomit-frame-pointer) ;;
3136             -g)                   echo -Z7 ;;
3137             -fno-math-errno)      ;;
3138             -fno-common)          ;;
3139             -fno-signed-zeros)    ;;
3140             -fPIC)                ;;
3141             -mthumb)              ;;
3142             -march=*)             ;;
3143             -lz)                  echo zlib.lib ;;
3144             -lx264)               echo libx264.lib ;;
3145             -l*)                  echo ${flag#-l}.lib ;;
3146             -L*)                  echo -libpath:${flag#-L} ;;
3147             *)                    echo $flag ;;
3148         esac
3149     done
3150 }
3151
3152 msvc_flags(){
3153     msvc_common_flags "$@"
3154     for flag; do
3155         case $flag in
3156             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3157                                        -wd4554 ;;
3158             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3159                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3160                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3161                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3162         esac
3163     done
3164 }
3165
3166 icl_flags(){
3167     msvc_common_flags "$@"
3168     for flag; do
3169         case $flag in
3170             # Despite what Intel's documentation says -Wall, which is supported
3171             # on Windows, does enable remarks so disable them here.
3172             -Wall)                echo $flag -Qdiag-disable:remark ;;
3173             -std=c99)             echo -Qstd=c99 ;;
3174         esac
3175     done
3176 }
3177
3178 pgi_flags(){
3179     for flag; do
3180         case $flag in
3181             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3182             -fomit-frame-pointer) echo -Mnoframe ;;
3183             -g)                   echo -gopt ;;
3184             *)                    echo $flag ;;
3185         esac
3186     done
3187 }
3188
3189 suncc_flags(){
3190     for flag; do
3191         case $flag in
3192             -march=*|-mcpu=*)
3193                 case "${flag#*=}" in
3194                     native)                   echo -xtarget=native       ;;
3195                     v9|niagara)               echo -xarch=sparc          ;;
3196                     ultrasparc)               echo -xarch=sparcvis       ;;
3197                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3198                     i586|pentium)             echo -xchip=pentium        ;;
3199                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3200                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3201                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3202                     pentium4*)          echo -xtarget=pentium4           ;;
3203                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3204                     *-sse3)             echo -xarch=sse3                 ;;
3205                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3206                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3207                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3208                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3209                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3210                     k8|opteron|athlon64|athlon-fx)
3211                                                echo -xarch=sse2a         ;;
3212                     athlon*)                   echo -xarch=pentium_proa  ;;
3213                 esac
3214                 ;;
3215             -std=c99)             echo -xc99              ;;
3216             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3217             -fPIC)                echo -KPIC -xcode=pic32 ;;
3218             -W*,*)                echo $flag              ;;
3219             -f*-*|-W*|-mimpure-text)                      ;;
3220             -shared)              echo -G                 ;;
3221             *)                    echo $flag              ;;
3222         esac
3223     done
3224 }
3225
3226 tms470_flags(){
3227     for flag; do
3228         case $flag in
3229             -march=*|-mcpu=*)
3230                 case "${flag#*=}" in
3231                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3232                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3233                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3234                     armv6*|arm11*)          echo -mv=6   ;;
3235                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3236                                             echo -mv=5e  ;;
3237                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3238                 esac
3239                 ;;
3240             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3241             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3242             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3243             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3244             -msoft-float)   echo --float_support=vfplib       ;;
3245             -O[0-3]|-mf=*)  echo $flag                        ;;
3246             -g)             echo -g -mn                       ;;
3247             -pds=*)         echo $flag                        ;;
3248             -D*|-I*)        echo $flag                        ;;
3249             --gcc|--abi=*)  echo $flag                        ;;
3250             -me)            echo $flag                        ;;
3251         esac
3252     done
3253 }
3254
3255 probe_cc(){
3256     pfx=$1
3257     _cc=$2
3258
3259     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3260     unset _ld_o _ldflags _ld_lib _ld_path
3261     unset _depflags _DEPCMD _DEPFLAGS
3262     _flags_filter=echo
3263
3264     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3265         _type=llvm_gcc
3266         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3267         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3268         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3269         _cflags_speed='-O3'
3270         _cflags_size='-Os'
3271     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3272         _type=gcc
3273         gcc_version=$($_cc --version | head -n1)
3274         gcc_basever=$($_cc -dumpversion)
3275         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3276         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3277         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3278         if ! $_cc -dumpversion | grep -q '^2\.'; then
3279             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3280         fi
3281         _cflags_speed='-O3'
3282         _cflags_size='-Os'
3283     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3284         _type=icc
3285         _ident=$($_cc --version | head -n1)
3286         _depflags='-MMD'
3287         _cflags_speed='-O3'
3288         _cflags_size='-Os'
3289         _cflags_noopt='-O1'
3290     elif $_cc -v 2>&1 | grep -q xlc; then
3291         _type=xlc
3292         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3293         _cflags_speed='-O5'
3294         _cflags_size='-O5 -qcompact'
3295     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3296         _type=ccc
3297         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3298         _DEPFLAGS='-M'
3299         _cflags_speed='-fast'
3300         _cflags_size='-O1'
3301         _flags_filter=ccc_flags
3302     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3303         test -d "$sysroot" || die "No valid sysroot specified."
3304         _type=armcc
3305         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3306         armcc_conf="$PWD/armcc.conf"
3307         $_cc --arm_linux_configure                 \
3308              --arm_linux_config_file="$armcc_conf" \
3309              --configure_sysroot="$sysroot"        \
3310              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3311              die "Error creating armcc configuration file."
3312         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3313         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3314         as_default="${cross_prefix}gcc"
3315         _depflags='-MMD'
3316         _cflags_speed='-O3'
3317         _cflags_size='-Os'
3318     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3319         _type=tms470
3320         _ident=$($_cc -version | head -n1 | tr -s ' ')
3321         _flags='--gcc --abi=eabi -me'
3322         _cc_e='-ppl -fe=$@'
3323         _cc_o='-fe=$@'
3324         _depflags='-ppa -ppd=$(@:.o=.d)'
3325         _cflags_speed='-O3 -mf=5'
3326         _cflags_size='-O3 -mf=2'
3327         _flags_filter=tms470_flags
3328     elif $_cc -v 2>&1 | grep -q clang; then
3329         _type=clang
3330         _ident=$($_cc --version 2>/dev/null | head -n1)
3331         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3332         _cflags_speed='-O3'
3333         _cflags_size='-Os'
3334     elif $_cc -V 2>&1 | grep -q Sun; then
3335         _type=suncc
3336         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3337         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3338         _DEPFLAGS='-xM1 -xc99'
3339         _ldflags='-std=c99'
3340         _cflags_speed='-O5'
3341         _cflags_size='-O5 -xspace'
3342         _flags_filter=suncc_flags
3343     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3344         _type=pathscale
3345         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3346         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3347         _cflags_speed='-O2'
3348         _cflags_size='-Os'
3349         _flags_filter='filter_out -Wdisabled-optimization'
3350     elif $_cc -v 2>&1 | grep -q Open64; then
3351         _type=open64
3352         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3353         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3354         _cflags_speed='-O2'
3355         _cflags_size='-Os'
3356         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3357     elif $_cc -V 2>&1 | grep -q Portland; then
3358         _type=pgi
3359         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3360         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3361         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3362         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3363         _cflags_noopt="-O1"
3364         _flags_filter=pgi_flags
3365     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3366         _type=armasm
3367         _ident=$($_cc | head -n1)
3368         # 4509: "This form of conditional instruction is deprecated"
3369         _flags="-nologo -ignore 4509"
3370         _flags_filter=armasm_flags
3371     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3372         _type=msvc
3373         _ident=$($_cc 2>&1 | head -n1)
3374         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3375         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3376         _cflags_speed="-O2"
3377         _cflags_size="-O1"
3378         _cflags_noopt="-O1"
3379         if $_cc -nologo- 2>&1 | grep -q Linker; then
3380             _ld_o='-out:$@'
3381         else
3382             _ld_o='-Fe$@'
3383         fi
3384         _cc_o='-Fo$@'
3385         _cc_e='-P -Fi$@'
3386         _flags_filter=msvc_flags
3387         _ld_lib='lib%.a'
3388         _ld_path='-libpath:'
3389         _flags='-nologo'
3390     elif $_cc 2>&1 | grep -q Intel; then
3391         _type=icl
3392         _ident=$($_cc 2>&1 | head -n1)
3393         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3394         # Not only is O3 broken on 13.x+ but it is slower on all previous
3395         # versions (tested) as well.
3396         _cflags_speed="-O2"
3397         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3398         if $_cc 2>&1 | grep -q Linker; then
3399             _ld_o='-out:$@'
3400         else
3401             _ld_o='-Fe$@'
3402         fi
3403         _cc_o='-Fo$@'
3404         _cc_e='-P'
3405         _flags_filter=icl_flags
3406         _ld_lib='lib%.a'
3407         _ld_path='-libpath:'
3408         # -Qdiag-error to make icl error when seeing certain unknown arguments
3409         _flags='-nologo -Qdiag-error:4044,10157'
3410         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3411         # with MSVC which enables it by default.
3412         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3413     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3414         # lld can emulate multiple different linkers; in ms link.exe mode,
3415         # the -? parameter gives the help output which contains an identifyable
3416         # string, while it gives an error in other modes.
3417         _type=lld-link
3418         # The link.exe mode doesn't have a switch for getting the version,
3419         # but we can force it back to gnu mode and get the version from there.
3420         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3421         _ld_o='-out:$@'
3422         _flags_filter=msvc_flags
3423         _ld_lib='lib%.a'
3424         _ld_path='-libpath:'
3425     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3426         _type=cparser
3427         _ident=$($_cc --version | head -n1)
3428         _depflags='-MMD'
3429         _cflags_speed='-O4'
3430         _cflags_size='-O2'
3431         _flags_filter=cparser_flags
3432     fi
3433
3434     eval ${pfx}_type=\$_type
3435     eval ${pfx}_ident=\$_ident
3436 }
3437
3438 set_ccvars(){
3439     eval ${1}_C=\${_cc_c-\${${1}_C}}
3440     eval ${1}_E=\${_cc_e-\${${1}_E}}
3441     eval ${1}_O=\${_cc_o-\${${1}_O}}
3442
3443     if [ -n "$_depflags" ]; then
3444         eval ${1}_DEPFLAGS=\$_depflags
3445     else
3446         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3447         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3448         eval DEP${1}FLAGS=\$_flags
3449     fi
3450 }
3451
3452 probe_cc cc "$cc"
3453 cflags_filter=$_flags_filter
3454 cflags_speed=$_cflags_speed
3455 cflags_size=$_cflags_size
3456 cflags_noopt=$_cflags_noopt
3457 add_cflags $_flags $_cflags
3458 cc_ldflags=$_ldflags
3459 set_ccvars CC
3460
3461 probe_cc hostcc "$host_cc"
3462 host_cflags_filter=$_flags_filter
3463 host_cflags_speed=$_cflags_speed
3464 add_host_cflags  $_flags $_cflags
3465 set_ccvars HOSTCC
3466
3467 test -n "$cc_type" && enable $cc_type ||
3468     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3469
3470 : ${as_default:=$cc}
3471 : ${objcc_default:=$cc}
3472 : ${dep_cc_default:=$cc}
3473 : ${ld_default:=$cc}
3474 : ${host_ld_default:=$host_cc}
3475 set_default ar as objcc dep_cc ld host_ld
3476
3477 probe_cc as "$as"
3478 asflags_filter=$_flags_filter
3479 add_asflags $_flags $_cflags
3480 set_ccvars AS
3481
3482 probe_cc objcc "$objcc"
3483 objcflags_filter=$_flags_filter
3484 add_objcflags $_flags $_cflags
3485 set_ccvars OBJC
3486
3487 probe_cc ld "$ld"
3488 ldflags_filter=$_flags_filter
3489 add_ldflags $_flags $_ldflags
3490 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3491 LD_O=${_ld_o-$LD_O}
3492 LD_LIB=${_ld_lib-$LD_LIB}
3493 LD_PATH=${_ld_path-$LD_PATH}
3494
3495 probe_cc hostld "$host_ld"
3496 host_ldflags_filter=$_flags_filter
3497 add_host_ldflags $_flags $_ldflags
3498 HOSTLD_O=${_ld_o-$HOSTLD_O}
3499
3500 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3501     probe_cc depcc "$dep_cc"
3502     CCDEP=${_DEPCMD:-$DEPCMD}
3503     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3504     DEPCCFLAGS=$_flags
3505 fi
3506
3507 if $ar 2>&1 | grep -q Microsoft; then
3508     arflags="-nologo"
3509     ar_o='-out:$@'
3510 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3511     arflags="rq"
3512     ar_o='$@'
3513 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3514     arflags='-Xany -r -c'
3515     ar_o='$@'
3516 else
3517     arflags="rc"
3518     ar_o='$@'
3519 fi
3520
3521 add_cflags $extra_cflags
3522 add_objcflags $extra_objcflags
3523 add_asflags $extra_cflags
3524
3525 if test -n "$sysroot"; then
3526     case "$cc_type" in
3527         gcc|llvm_gcc|clang)
3528             add_cppflags --sysroot="$sysroot"
3529             add_ldflags --sysroot="$sysroot"
3530         ;;
3531         tms470)
3532             add_cppflags -I"$sysinclude"
3533             add_ldflags  --sysroot="$sysroot"
3534         ;;
3535     esac
3536 fi
3537
3538 if test "$cpu" = host; then
3539     enabled cross_compile &&
3540         die "--cpu=host makes no sense when cross-compiling."
3541
3542     case "$cc_type" in
3543         gcc|llvm_gcc)
3544             check_native(){
3545                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3546                 sed -n "/cc1.*$1=/{
3547                             s/.*$1=\\([^ ]*\\).*/\\1/
3548                             p
3549                             q
3550                         }" $TMPE
3551             }
3552             cpu=$(check_native -march || check_native -mcpu)
3553         ;;
3554     esac
3555
3556     test "${cpu:-host}" = host &&
3557         die "--cpu=host not supported with compiler $cc"
3558 fi
3559
3560 # Deal with common $arch aliases
3561 case "$arch" in
3562     aarch64|arm64)
3563         arch="aarch64"
3564     ;;
3565     arm*)
3566         arch="arm"
3567     ;;
3568     mips*|IP*)
3569         case "$arch" in
3570         *el)
3571             add_cppflags -EL
3572             add_ldflags -EL
3573         ;;
3574         *eb)
3575             add_cppflags -EB
3576             add_ldflags -EB
3577         ;;
3578         esac
3579         arch="mips"
3580     ;;
3581     parisc*|hppa*)
3582         arch="parisc"
3583     ;;
3584     "Power Macintosh"|ppc*|powerpc*)
3585         arch="ppc"
3586     ;;
3587     s390|s390x)
3588         arch="s390"
3589     ;;
3590     sh4|sh)
3591         arch="sh4"
3592     ;;
3593     sun4u|sparc*)
3594         arch="sparc"
3595     ;;
3596     tilegx|tile-gx)
3597         arch="tilegx"
3598     ;;
3599     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3600         arch="x86"
3601     ;;
3602 esac
3603
3604 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3605 enable $arch
3606
3607 # Add processor-specific flags
3608 if enabled aarch64; then
3609
3610     case $cpu in
3611         armv*)
3612             cpuflags="-march=$cpu"
3613         ;;
3614         *)
3615             cpuflags="-mcpu=$cpu"
3616         ;;
3617     esac
3618
3619 elif enabled alpha; then
3620
3621     cpuflags="-mcpu=$cpu"
3622
3623 elif enabled arm; then
3624
3625     check_arm_arch() {
3626         check_cpp_condition stddef.h \
3627             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3628             $cpuflags
3629     }
3630
3631     probe_arm_arch() {
3632         if   check_arm_arch 4;        then echo armv4
3633         elif check_arm_arch 4T;       then echo armv4t
3634         elif check_arm_arch 5;        then echo armv5
3635         elif check_arm_arch 5E;       then echo armv5e
3636         elif check_arm_arch 5T;       then echo armv5t
3637         elif check_arm_arch 5TE;      then echo armv5te
3638         elif check_arm_arch 5TEJ;     then echo armv5te
3639         elif check_arm_arch 6;        then echo armv6
3640         elif check_arm_arch 6J;       then echo armv6j
3641         elif check_arm_arch 6K;       then echo armv6k
3642         elif check_arm_arch 6Z;       then echo armv6z
3643         elif check_arm_arch 6ZK;      then echo armv6zk
3644         elif check_arm_arch 6T2;      then echo armv6t2
3645         elif check_arm_arch 7;        then echo armv7
3646         elif check_arm_arch 7A  7_A;  then echo armv7-a
3647         elif check_arm_arch 7S;       then echo armv7-a
3648         elif check_arm_arch 7R  7_R;  then echo armv7-r
3649         elif check_arm_arch 7M  7_M;  then echo armv7-m
3650         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3651         elif check_arm_arch 8A  8_A;  then echo armv8-a
3652         fi
3653     }
3654
3655     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3656
3657     case $cpu in
3658         armv*)
3659             cpuflags="-march=$cpu"
3660             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3661         ;;
3662         *)
3663             cpuflags="-mcpu=$cpu"
3664             case $cpu in
3665                 cortex-a*)                               subarch=armv7a  ;;
3666                 cortex-r*)                               subarch=armv7r  ;;
3667                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3668                 arm11*)                                  subarch=armv6   ;;
3669                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3670                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3671                 *)                             subarch=$(probe_arm_arch) ;;
3672             esac
3673         ;;
3674     esac
3675
3676     case "$subarch" in
3677         armv5t*)    enable fast_clz                ;;
3678         armv[6-8]*) enable fast_clz fast_unaligned ;;
3679     esac
3680
3681 elif enabled avr32; then
3682
3683     case $cpu in
3684         ap7[02]0[0-2])
3685             subarch="avr32_ap"
3686             cpuflags="-mpart=$cpu"
3687         ;;
3688         ap)
3689             subarch="avr32_ap"
3690             cpuflags="-march=$cpu"
3691         ;;
3692         uc3[ab]*)
3693             subarch="avr32_uc"
3694             cpuflags="-mcpu=$cpu"
3695         ;;
3696         uc)
3697             subarch="avr32_uc"
3698             cpuflags="-march=$cpu"
3699         ;;
3700     esac
3701
3702 elif enabled bfin; then
3703
3704     cpuflags="-mcpu=$cpu"
3705
3706 elif enabled mips; then
3707
3708     cpuflags="-march=$cpu"
3709
3710 elif enabled ppc; then
3711
3712     disable ldbrx
3713
3714     case $(tolower $cpu) in
3715         601|ppc601|powerpc601)
3716             cpuflags="-mcpu=601"
3717             disable altivec
3718         ;;
3719         603*|ppc603*|powerpc603*)
3720             cpuflags="-mcpu=603"
3721             disable altivec
3722         ;;
3723         604*|ppc604*|powerpc604*)
3724             cpuflags="-mcpu=604"
3725             disable altivec
3726         ;;
3727         g3|75*|ppc75*|powerpc75*)
3728             cpuflags="-mcpu=750"
3729             disable altivec
3730         ;;
3731         g4|745*|ppc745*|powerpc745*)
3732             cpuflags="-mcpu=7450"
3733             disable vsx
3734         ;;
3735         74*|ppc74*|powerpc74*)
3736             cpuflags="-mcpu=7400"
3737             disable vsx
3738         ;;
3739         g5|970|ppc970|powerpc970)
3740             cpuflags="-mcpu=970"
3741             disable vsx
3742         ;;
3743         power[3-6]*)
3744             cpuflags="-mcpu=$cpu"
3745             disable vsx
3746         ;;
3747         power[7-8]*)
3748             cpuflags="-mcpu=$cpu"
3749             enable ldbrx
3750         ;;
3751         cell)
3752             cpuflags="-mcpu=cell"
3753             enable ldbrx
3754             disable vsx
3755         ;;
3756         e500mc)
3757             cpuflags="-mcpu=e500mc"
3758             disable altivec
3759         ;;
3760         e500v2)
3761             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3762             disable altivec
3763             disable dcbzl
3764         ;;
3765         e500)
3766             cpuflags="-mcpu=8540 -mhard-float"
3767             disable altivec
3768             disable dcbzl
3769         ;;
3770     esac
3771
3772 elif enabled sparc; then
3773
3774     case $cpu in
3775         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3776             cpuflags="-mcpu=$cpu"
3777         ;;
3778         ultrasparc*|niagara[234])
3779             cpuflags="-mcpu=$cpu"
3780         ;;
3781     esac
3782
3783 elif enabled x86; then
3784
3785     case $cpu in
3786         i[345]86|pentium)
3787             cpuflags="-march=$cpu"
3788             disable i686
3789             disable mmx
3790         ;;
3791         # targets that do NOT support nopl and conditional mov (cmov)
3792         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3793             cpuflags="-march=$cpu"
3794             disable i686
3795         ;;
3796         # targets that do support nopl and conditional mov (cmov)
3797         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3798             cpuflags="-march=$cpu"
3799             enable i686
3800             enable fast_cmov
3801         ;;
3802         # targets that do support conditional mov but on which it's slow
3803         pentium4|pentium4m|prescott|nocona)
3804             cpuflags="-march=$cpu"
3805             enable i686
3806             disable fast_cmov
3807         ;;
3808     esac
3809
3810 fi
3811
3812 if [ "$cpu" != generic ]; then
3813     add_cflags  $cpuflags
3814     add_asflags $cpuflags
3815     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3816 fi
3817
3818 # compiler sanity check
3819 check_exec <<EOF
3820 int main(void){ return 0; }
3821 EOF
3822 if test "$?" != 0; then
3823     echo "$cc is unable to create an executable file."
3824     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3825         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3826         echo "Only do this if you know what cross compiling means."
3827     fi
3828     die "C compiler test failed."
3829 fi
3830
3831 add_cppflags -D_ISOC99_SOURCE
3832
3833 # some compilers silently accept -std=c11, so we also need to check that the
3834 # version macro is defined properly
3835 check_cpp_condition stdlib.h  "__STDC_VERSION__ >= 201112L" -std=c11 &&
3836     add_cflags -std=c11 ||
3837     check_cflags -std=c99
3838
3839 check_cppflags -D_FILE_OFFSET_BITS=64
3840 check_cppflags -D_LARGEFILE_SOURCE
3841
3842 add_host_cppflags -D_ISOC99_SOURCE
3843 check_host_cflags -std=c99
3844 check_host_cflags -Wall
3845 check_host_cflags $host_cflags_speed
3846
3847 check_64bit(){
3848     arch32=$1
3849     arch64=$2
3850     expr=$3
3851     check_code cc "" "int test[2*($expr) - 1]" &&
3852         subarch=$arch64 || subarch=$arch32
3853 }
3854
3855 case "$arch" in
3856     aarch64|alpha|ia64)
3857         spic=$shared
3858     ;;
3859     mips)
3860         check_64bit mips mips64 '_MIPS_SIM > 1'
3861         spic=$shared
3862     ;;
3863     parisc)
3864         check_64bit parisc parisc64 'sizeof(void *) > 4'
3865         spic=$shared
3866     ;;
3867     ppc)
3868         check_64bit ppc ppc64 'sizeof(void *) > 4'
3869         spic=$shared
3870     ;;
3871     s390)
3872         check_64bit s390 s390x 'sizeof(void *) > 4'
3873         spic=$shared
3874     ;;
3875     sparc)
3876         check_64bit sparc sparc64 'sizeof(void *) > 4'
3877         spic=$shared
3878     ;;
3879     x86)
3880         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3881         if test "$subarch" = "x86_64"; then
3882             spic=$shared
3883         fi
3884     ;;
3885 esac
3886
3887 enable $subarch
3888 enabled spic && enable_weak pic
3889
3890 enabled x86_64 && objformat=elf64 || objformat="elf32"
3891
3892 # OS specific
3893 case $target_os in
3894     aix)
3895         SHFLAGS=-shared
3896         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3897         enabled shared && add_ldflags -Wl,-brtl
3898         ;;
3899     android)
3900         disable symver
3901         enable section_data_rel_ro
3902         SLIB_INSTALL_NAME='$(SLIBNAME)'
3903         SLIB_INSTALL_LINKS=
3904         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3905         ;;
3906     haiku)
3907         prefix_default="/boot/common"
3908         network_extralibs="-lnetwork"
3909         host_extralibs=
3910         ;;
3911     sunos)
3912         SHFLAGS='-shared -Wl,-h,$$(@F)'
3913         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3914         network_extralibs="-lsocket -lnsl"
3915         # When using suncc to build, the Solaris linker will mark
3916         # an executable with each instruction set encountered by
3917         # the Solaris assembler.  As our libraries contain their own
3918         # guards for processor-specific code, instead suppress
3919         # generation of the HWCAPS ELF section on Solaris x86 only.
3920         enabled_all suncc x86 &&
3921             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3922             add_ldflags -Wl,-M,mapfile
3923         nm_default='nm -P -g'
3924         version_script='-M'
3925         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3926         ;;
3927     netbsd)
3928         disable symver
3929         oss_indev_extralibs="-lossaudio"
3930         oss_outdev_extralibs="-lossaudio"
3931         ;;
3932     openbsd|bitrig)
3933         disable symver
3934         SHFLAGS='-shared'
3935         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3936         SLIB_INSTALL_LINKS=
3937         oss_indev_extralibs="-lossaudio"
3938         oss_outdev_extralibs="-lossaudio"
3939         ;;
3940     dragonfly)
3941         disable symver
3942         ;;
3943     freebsd)
3944         ;;
3945     bsd/os)
3946         add_extralibs -lpoll -lgnugetopt
3947         ;;
3948     darwin)
3949         enabled ppc && add_asflags -force_cpusubtype_ALL
3950         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3951         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3952         add_ldflags -Wl,-dynamic,-search_paths_first
3953         check_cflags -Werror=partial-availability
3954         SLIBSUF=".dylib"
3955         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3956         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3957         enabled x86_64 && objformat="macho64" || objformat="macho32"
3958         enabled_any pic shared ||
3959             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3960         check_header dispatch/dispatch.h &&
3961             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3962         ;;
3963     msys*)
3964         die "Native MSYS builds are discouraged, please use the MINGW environment."
3965         ;;
3966     mingw32*|mingw64*)
3967         if test $target_os = "mingw32ce"; then
3968             disable network
3969         else
3970             target_os=mingw32
3971         fi
3972         LIBTARGET=i386
3973         if enabled x86_64; then
3974             LIBTARGET="i386:x86-64"
3975         elif enabled arm; then
3976             LIBTARGET=arm-wince
3977         fi
3978         check_ldflags -Wl,--nxcompat
3979         check_ldflags -Wl,--dynamicbase
3980         shlibdir_default="$bindir_default"
3981         SLIBPREF=""
3982         SLIBSUF=".dll"
3983         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3984         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3985         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3986         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3987         SLIB_INSTALL_LINKS=
3988         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3989         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3990         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3991         enabled x86_64 && objformat="win64" || objformat="win32"
3992         dlltool="${cross_prefix}dlltool"
3993         ranlib=:
3994         enable dos_paths
3995         ;;
3996     win32|win64)
3997         disable symver
3998         if enabled shared; then
3999             # Link to the import library instead of the normal static library
4000             # for shared libs.
4001             LD_LIB='%.lib'
4002             # Cannot build both shared and static libs with MSVC or icl.
4003             disable static
4004         fi
4005         shlibdir_default="$bindir_default"
4006         SLIBPREF=""
4007         SLIBSUF=".dll"
4008         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4009         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4010         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
4011         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4012         SLIB_INSTALL_LINKS=
4013         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
4014         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
4015         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
4016         enabled x86_64 && objformat="win64" || objformat="win32"
4017         ranlib=:
4018         enable dos_paths
4019         ;;
4020     cygwin*)
4021         target_os=cygwin
4022         shlibdir_default="$bindir_default"
4023         SLIBPREF="cyg"
4024         SLIBSUF=".dll"
4025         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4026         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
4027         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
4028         SLIB_INSTALL_LINKS=
4029         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
4030         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
4031         enabled x86_64 && objformat="win64" || objformat="win32"
4032         enable dos_paths
4033         ;;
4034     *-dos|freedos|opendos)
4035         network_extralibs="-lsocket"
4036         objformat="coff"
4037         enable dos_paths
4038         add_cppflags -U__STRICT_ANSI__
4039         ;;
4040     linux)
4041         enable dv1394
4042         enable section_data_rel_ro
4043         ;;
4044     irix*)
4045         target_os=irix
4046         ranlib="echo ignoring ranlib"
4047         ;;
4048     os/2*)
4049         ln_s="cp -f"
4050         objformat="aout"
4051         add_cppflags -D_GNU_SOURCE
4052         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
4053         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
4054         LIBSUF="_s.a"
4055         SLIBPREF=""
4056         SLIBSUF=".dll"
4057         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
4058         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
4059         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
4060             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
4061             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
4062             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
4063             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
4064         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
4065             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
4066         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
4067         enable dos_paths
4068         ;;
4069     gnu/kfreebsd)
4070         add_cppflags -D_BSD_SOURCE
4071         ;;
4072     gnu)
4073         ;;
4074     qnx)
4075         add_cppflags -D_QNX_SOURCE
4076         network_extralibs="-lsocket"
4077         ;;
4078     symbian)
4079         SLIBSUF=".dll"
4080         enable dos_paths
4081         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4082         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4083         add_ldflags -Wl,--target1-abs,--no-undefined \
4084                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4085                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4086         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4087                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4088                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4089         ;;
4090     osf1)
4091         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4092         ;;
4093     minix)
4094         ;;
4095     none)
4096         ;;
4097     *)
4098         die "Unknown OS '$target_os'."
4099         ;;
4100 esac
4101
4102 # determine libc flavour
4103
4104 probe_libc(){
4105     pfx=$1
4106     pfx_no_=${pfx%_}
4107     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4108     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4109         eval ${pfx}libc_type=uclibc
4110         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4111     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4112         eval ${pfx}libc_type=glibc
4113         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4114     # MinGW headers can be installed on Cygwin, so check for newlib first.
4115     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4116         eval ${pfx}libc_type=newlib
4117         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4118     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4119     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4120         eval ${pfx}libc_type=mingw64
4121         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4122         eval test \$${pfx_no_}cc_type = "gcc" &&
4123             add_${pfx}cppflags -D__printf__=__gnu_printf__
4124     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4125          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4126         eval ${pfx}libc_type=mingw32
4127         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4128             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4129             die "ERROR: MinGW32 runtime version must be >= 3.15."
4130         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4131         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4132             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4133         eval test \$${pfx_no_}cc_type = "gcc" &&
4134             add_${pfx}cppflags -D__printf__=__gnu_printf__
4135     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4136         eval ${pfx}libc_type=msvcrt
4137         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4138             if [ "$pfx" = host_ ]; then
4139                 add_host_cppflags -Dsnprintf=_snprintf
4140             else
4141                 add_compat strtod.o strtod=avpriv_strtod
4142                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4143                                              _snprintf=avpriv_snprintf  \
4144                                              vsnprintf=avpriv_vsnprintf
4145             fi
4146         fi
4147         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4148         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4149         # 0x601 by default unless something else is set by the user.
4150         # This can easily lead to us detecting functions only present
4151         # in such new versions and producing binaries requiring windows 7.0.
4152         # Therefore explicitly set the default to XP unless the user has
4153         # set something else on the command line.
4154         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4155         # family. For these cases, configure is free to use any functions
4156         # found in the SDK headers by default. (Alternatively, we could force
4157         # _WIN32_WINNT to 0x0602 in that case.)
4158         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4159             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4160 #ifdef WINAPI_FAMILY
4161 #include <winapifamily.h>
4162 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4163 #error not desktop
4164 #endif
4165 #endif
4166 EOF
4167         if [ "$pfx" = "" ]; then
4168             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4169         fi
4170     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4171         eval ${pfx}libc_type=klibc
4172     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4173         eval ${pfx}libc_type=bionic
4174     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4175         eval ${pfx}libc_type=solaris
4176         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4177     else
4178         eval ${pfx}libc_type=default
4179         add_${pfx}cppflags -D_DEFAULT_SOURCE
4180     fi
4181 }
4182
4183 probe_libc
4184 test -n "$libc_type" && enable libc_$libc_type
4185 probe_libc host_
4186 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4187
4188 # hacks for compiler/libc/os combinations
4189
4190 case $libc_type in
4191     bionic)
4192         add_compat strtod.o strtod=avpriv_strtod
4193         ;;
4194     glibc)
4195         if enabled tms470; then
4196             CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4197             add_cppflags -D__USER_LABEL_PREFIX__=
4198             add_cppflags -D__builtin_memset=memset
4199             add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4200             add_cflags   -pds=48    # incompatible redefinition of macro
4201         elif enabled ccc; then
4202             add_ldflags -Wl,-z,now  # calls to libots crash without this
4203         fi
4204         ;;
4205 esac
4206
4207 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4208     add_cppflags '-I\$(SRC_PATH)/compat/float'
4209
4210 esc(){
4211     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4212 }
4213
4214 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
4215
4216 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4217
4218 set_default $PATHS_LIST
4219 set_default nm
4220
4221 # we need to build at least one lib type
4222 if ! enabled_any static shared; then
4223     cat <<EOF
4224 At least one library type must be built.
4225 Specify --enable-static to build the static libraries or --enable-shared to
4226 build the shared libraries as well. To only build the shared libraries specify
4227 --disable-static in addition to --enable-shared.
4228 EOF
4229     exit 1
4230 fi
4231
4232 disabled optimizations || check_cflags -fomit-frame-pointer
4233
4234 enable_weak_pic() {
4235     disabled pic && return
4236     enable pic
4237     add_cppflags -DPIC
4238     case "$target_os" in
4239     mingw*|cygwin*)
4240         ;;
4241     *)
4242         add_cflags -fPIC
4243         ;;
4244     esac
4245     add_asflags  -fPIC
4246 }
4247
4248 enabled pic && enable_weak_pic
4249
4250 check_cc <<EOF || die "Symbol mangling check failed."
4251 int ff_extern;
4252 EOF
4253 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4254 extern_prefix=${sym%%ff_extern*}
4255
4256 check_inline_asm inline_asm '"" ::'
4257
4258 _restrict=
4259 for restrict_keyword in restrict __restrict__ __restrict; do
4260     check_cc <<EOF && _restrict=$restrict_keyword && break
4261 void foo(char * $restrict_keyword p);
4262 EOF
4263 done
4264
4265 check_cc <<EOF && enable pragma_deprecated
4266 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4267 EOF
4268
4269 check_cc <<EOF && enable attribute_packed
4270 struct { int x; } __attribute__((packed)) x;
4271 EOF
4272
4273 check_cc <<EOF && enable attribute_may_alias
4274 union { int x; } __attribute__((may_alias)) x;
4275 EOF
4276
4277 check_cc <<EOF || die "endian test failed"
4278 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4279 EOF
4280 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4281
4282 check_gas() {
4283     log "check_gas using '$as' as AS"
4284     # :vararg is used on aarch64, arm and ppc altivec
4285     check_as <<EOF || return 1
4286 .macro m n, y:vararg=0
4287 \n: .int \y
4288 .endm
4289 m x
4290 EOF
4291     # .altmacro is only used in arm asm
4292     ! enabled arm || check_as <<EOF || return 1
4293 .altmacro
4294 EOF
4295     enable gnu_as
4296     return 0
4297 }
4298
4299 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4300     nogas=:
4301     enabled_any arm aarch64 && nogas=die
4302     enabled_all ppc altivec && nogas=warn
4303     as_noop=-v
4304
4305     case $as_type in
4306         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4307         gcc)  gaspp_as_type=gas ;;
4308         *)    gaspp_as_type=$as_type ;;
4309     esac
4310
4311     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4312
4313     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4314         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4315
4316     if ! check_gas ; then
4317         as=${gas:=$as}
4318         check_gas || \
4319             $nogas "GNU assembler not found, install/update gas-preprocessor"
4320     fi
4321
4322     check_as <<EOF && enable as_func
4323 .func test
4324 .endfunc
4325 EOF
4326 fi
4327
4328 check_inline_asm inline_asm_labels '"1:\n"'
4329
4330 if enabled aarch64; then
4331     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4332     # internal assembler in clang 3.3 does not support this instruction
4333     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4334     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4335
4336     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4337
4338 elif enabled alpha; then
4339
4340     check_cflags -mieee
4341
4342 elif enabled arm; then
4343
4344     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4345     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4346     enabled thumb && check_cflags -mthumb || check_cflags -marm
4347
4348     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4349         enable vfp_args
4350     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4351         enable vfp_args
4352     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4353         case "${cross_prefix:-$cc}" in
4354             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4355             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4356 __asm__ (".eabi_attribute 28, 1");
4357 int main(void) { return 0; }
4358 EOF
4359         esac
4360         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4361     fi
4362
4363     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4364     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4365     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4366     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4367     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4368     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4369
4370     [ $target_os = linux ] || [ $target_os = android ] ||
4371         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4372             $ARCH_EXT_LIST_ARM
4373
4374     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4375
4376     check_as <<EOF && enable as_dn_directive
4377 ra .dn d0.i16
4378 .unreq ra
4379 EOF
4380     check_as <<EOF && enable as_fpu_directive
4381 .fpu neon
4382 EOF
4383
4384     # llvm's integrated assembler supports .object_arch from llvm 3.5
4385     [ "$objformat" = elf32 ] || [ "$objformat" = elf64 ] &&
4386         check_as <<EOF && enable as_object_arch
4387 .object_arch armv4
4388 EOF
4389
4390     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4391
4392 elif enabled mips; then
4393
4394     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4395
4396     # make sure that only an instruction set is enabled
4397     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4398
4399     if enabled mips64; then
4400         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4401             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4402                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4403     else
4404         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4405             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4406                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4407     fi
4408
4409 elif enabled parisc; then
4410
4411     if enabled gcc; then
4412         case $($cc -dumpversion) in
4413             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4414         esac
4415     fi
4416
4417 elif enabled ppc; then
4418
4419     enable local_aligned_8 local_aligned_16 local_aligned_32
4420
4421     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4422     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4423     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4424     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4425
4426     # AltiVec flags: The FSF version of GCC differs from the Apple version
4427     if enabled altivec; then
4428         check_cflags -maltivec -mabi=altivec &&
4429         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4430         check_cflags -faltivec
4431
4432         # check if our compiler supports Motorola AltiVec C API
4433         check_cc <<EOF || disable altivec
4434 $inc_altivec_h
4435 int main(void) {
4436     vector signed int v1 = (vector signed int) { 0 };
4437     vector signed int v2 = (vector signed int) { 1 };
4438     v1 = vec_add(v1, v2);
4439     return 0;
4440 }
4441 EOF
4442
4443         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4444     fi
4445
4446     if enabled vsx; then
4447         check_cflags -mvsx &&
4448         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4449     fi
4450
4451     if enabled power8; then
4452         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4453     fi
4454
4455 elif enabled x86; then
4456
4457     check_builtin rdtsc    intrin.h   "__rdtsc()"
4458     check_builtin mm_empty mmintrin.h "_mm_empty()"
4459
4460     enable local_aligned_8 local_aligned_16 local_aligned_32
4461
4462     # check whether EBP is available on x86
4463     # As 'i' is stored on the stack, this program will crash
4464     # if the base pointer is used to access it because the
4465     # base pointer is cleared in the inline assembly code.
4466     check_exec_crash <<EOF && enable ebp_available
4467 volatile int i=0;
4468 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4469 return i;
4470 EOF
4471
4472     # check whether EBX is available on x86
4473     check_inline_asm ebx_available '""::"b"(0)' &&
4474         check_inline_asm ebx_available '"":::"%ebx"'
4475
4476     # check whether xmm clobbers are supported
4477     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4478
4479     # check whether binutils is new enough to compile SSSE3/MMXEXT
4480     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4481     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4482
4483     probe_x86asm(){
4484         x86asmexe_probe=$1
4485         if check_cmd $x86asmexe_probe -v; then
4486             x86asmexe=$x86asmexe_probe
4487             x86asm_type=nasm
4488             x86asm_debug="-g -F dwarf"
4489             X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
4490         elif check_cmd $x86asmexe_probe --version; then
4491             x86asmexe=$x86asmexe_probe
4492             x86asm_type=yasm
4493             x86asm_debug="-g dwarf2"
4494             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
4495         fi
4496     }
4497
4498     if ! disabled_any asm mmx x86asm; then
4499         for program in $x86asmexe nasm yasm; do
4500             probe_x86asm $program
4501             test -n "$x86asm_type" && break
4502         done
4503         X86ASMFLAGS="-f $objformat"
4504         enabled pic               && append X86ASMFLAGS "-DPIC"
4505         test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
4506         case "$objformat" in
4507             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
4508         esac
4509
4510         check_x86asm "movbe ecx, [5]" && enable x86asm ||
4511             die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
4512         check_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4513         check_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4514         check_x86asm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4515         check_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4516         check_x86asm "CPU amdnop"                      || disable cpunop
4517     fi
4518
4519     case "$cpu" in
4520         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4521             disable fast_clz
4522         ;;
4523     esac
4524
4525 fi
4526
4527 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4528
4529 check_ldflags -Wl,--as-needed
4530
4531 if ! disabled network; then
4532     check_func getaddrinfo $network_extralibs
4533     check_func inet_aton $network_extralibs
4534
4535     check_type netdb.h "struct addrinfo"
4536     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4537     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4538     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4539     check_type poll.h "struct pollfd"
4540     check_type netinet/sctp.h "struct sctp_event_subscribe"
4541     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4542     check_type netinet/in.h "struct sockaddr_in6"
4543     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4544     check_type "sys/types.h sys/socket.h" socklen_t
4545
4546     # Prefer arpa/inet.h over winsock2
4547     if check_header arpa/inet.h ; then
4548         check_func closesocket
4549     elif check_header winsock2.h ; then
4550         check_func_headers winsock2.h closesocket -lws2 &&
4551             network_extralibs="-lws2" ||
4552         { check_func_headers winsock2.h closesocket -lws2_32 &&
4553             network_extralibs="-lws2_32"; } || disable winsock2_h network
4554         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4555
4556         check_type ws2tcpip.h socklen_t
4557         check_type ws2tcpip.h "struct addrinfo"
4558         check_type ws2tcpip.h "struct group_source_req"
4559         check_type ws2tcpip.h "struct ip_mreq_source"
4560         check_type ws2tcpip.h "struct ipv6_mreq"
4561         check_type winsock2.h "struct pollfd"
4562         check_struct winsock2.h "struct sockaddr" sa_len
4563         check_type ws2tcpip.h "struct sockaddr_in6"
4564         check_type ws2tcpip.h "struct sockaddr_storage"
4565     else
4566         disable network
4567     fi
4568 fi
4569
4570 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4571 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4572 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4573 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4574
4575 case "$custom_allocator" in
4576     jemalloc)
4577         # jemalloc by default does not use a prefix
4578         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4579     ;;
4580     tcmalloc)
4581         require_pkg_config libtcmalloc libtcmalloc gperftools/tcmalloc.h tc_malloc
4582         malloc_prefix=tc_
4583     ;;
4584 esac
4585
4586 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4587 check_func  ${malloc_prefix}memalign            && enable memalign
4588 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4589
4590 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4591     { check_lib clock_gettime time.h clock_gettime ||
4592       check_lib clock_gettime time.h clock_gettime -lrt; }
4593
4594 check_func  fcntl
4595 check_func  fork
4596 check_func  gethrtime
4597 check_func  getopt
4598 check_func  getrusage
4599 check_func  gettimeofday
4600 check_func  gmtime_r
4601 check_func  isatty
4602 check_func  localtime_r
4603 check_func  mach_absolute_time
4604 check_func  mkstemp
4605 check_func  mmap
4606 check_func  mprotect
4607 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4608 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4609 check_func  sched_getaffinity
4610 check_func  setrlimit
4611 check_func  strerror_r
4612 check_func  sysconf
4613 check_func  sysctl
4614 check_func  usleep
4615
4616 check_func_headers io.h setmode
4617 check_func_headers stdlib.h getenv
4618
4619 check_func_headers windows.h GetProcessAffinityMask
4620 check_func_headers windows.h GetProcessTimes
4621 check_func_headers windows.h GetSystemTimeAsFileTime
4622 check_func_headers windows.h LoadLibrary
4623 check_func_headers windows.h MapViewOfFile
4624 check_func_headers windows.h SetConsoleTextAttribute
4625 check_func_headers windows.h Sleep
4626 check_func_headers windows.h VirtualAlloc
4627 check_struct windows.h "CONDITION_VARIABLE" Ptr
4628
4629 check_header d3d11.h
4630 check_header direct.h
4631 check_header dlfcn.h
4632 check_header dxva.h
4633 check_header dxva2api.h
4634 check_header io.h
4635 check_header mach/mach_time.h
4636 check_header malloc.h
4637 check_header poll.h
4638 check_header sys/mman.h
4639 check_header sys/param.h
4640 check_header sys/resource.h
4641 check_header sys/select.h
4642 check_header sys/time.h
4643 check_header sys/un.h
4644 check_header unistd.h
4645 check_header valgrind/valgrind.h
4646 check_header VideoDecodeAcceleration/VDADecoder.h
4647 check_header windows.h
4648 check_header X11/extensions/XvMClib.h
4649
4650 # it seems there are versions of clang in some distros that try to use the
4651 # gcc headers, which explodes for stdatomic
4652 # so we also check that atomics actually work here
4653 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4654
4655 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4656 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4657 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4658
4659 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4660
4661 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4662 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4663 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4664
4665 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4666 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4667 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4668 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4669 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4670 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4671 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4672 check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
4673
4674 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4675
4676 if ! disabled w32threads && ! enabled pthreads; then
4677     check_lib w32threads "windows.h process.h" _beginthreadex
4678 fi
4679
4680 # check for some common methods of building with pthread support
4681 # do this before the optional library checks as some of them require pthreads
4682 if ! disabled pthreads && ! enabled w32threads; then
4683     if check_lib pthreads pthread.h pthread_join -pthread; then
4684         add_cflags -pthread
4685     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4686         add_cflags -pthreads
4687     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4688         :
4689     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4690         :
4691     elif check_func pthread_join; then
4692         enable pthreads
4693     fi
4694 fi
4695
4696 enabled pthreads &&
4697     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4698
4699 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4700 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4701
4702 # On some systems dynamic loading requires no extra linker flags
4703 check_lib libdl dlfcn.h dlopen || check_lib libdl dlfcn.h dlopen -ldl
4704
4705 check_lib libm math.h sin -lm
4706
4707 atan2f_args=2
4708 ldexpf_args=2
4709 powf_args=2
4710
4711 for func in $MATH_FUNCS; do
4712     eval check_mathfunc $func \${${func}_args:-1} $libm_extralibs
4713 done
4714
4715 # these are off by default, so fail if requested and not available
4716 enabled avisynth          && require_header avisynth/avisynth_c.h
4717 enabled avxsynth          && require_header avxsynth/avxsynth_c.h
4718 enabled cuda              && require cuda cuda.h cuInit -lcuda
4719 enabled frei0r            && require_header frei0r.h
4720 enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init
4721 enabled libbs2b           && require_pkg_config libbs2b libbs2b bs2b.h bs2b_open
4722 enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
4723 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4724 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4725 enabled libfdk_aac        && require_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4726 enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
4727 enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4728 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4729                                    check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
4730                                done || die "ERROR: libgsm not found"; }
4731 enabled libhdcd           && require_pkg_config libhdcd libhdcd "hdcd/hdcd_simple.h" hdcd_new
4732 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4733 enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4734 enabled libmfx            && require_pkg_config libmfx libmfx "mfx/mfxvideo.h" MFXInit
4735 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4736 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4737 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4738 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4739 enabled libopencv         && require_pkg_config libopencv opencv opencv/cv.h cvCreateImageHeader
4740 enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
4741 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4742                                require_pkg_config libopenjpeg libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4743 enabled libopus           && require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
4744 enabled libpulse          && require_pkg_config libpulse libpulse-simple pulse/simple.h pa_simple_new
4745 enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
4746 enabled libschroedinger   && require_pkg_config libschroedinger schroedinger-1.0 schroedinger/schro.h schro_init
4747 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4748 enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init -lspeex
4749 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4750 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4751 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4752 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4753 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4754 enabled libvpx            && require_pkg_config libvpx "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version &&
4755                              { enabled libvpx_vp8_decoder &&
4756                                    check_pkg_config libvpx_vp8_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx
4757                                enabled libvpx_vp8_encoder &&
4758                                    check_pkg_config libvpx_vp8_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx
4759                                enabled libvpx_vp9_decoder &&
4760                                    check_pkg_config libvpx_vp9_decoder vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx
4761                                enabled libvpx_vp9_encoder &&
4762                                    check_pkg_config libvpx_vp9_encoder vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx
4763                                disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder &&
4764                                    die "libvpx enabled but no supported decoders/encoders found"
4765                              }
4766 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4767 enabled libwebp           && require_pkg_config libwebp libwebp webp/encode.h WebPGetEncoderVersion
4768 enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
4769                              require_cpp_condition x264.h "X264_BUILD >= 118" &&
4770                              { check_cpp_condition x264.h "X264_MPEG2" &&
4771                                enable libx262; }
4772 enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
4773                              require_cpp_condition x265.h "X265_BUILD >= 57"
4774 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4775 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4776 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4777                                { ! enabled cross_compile &&
4778                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4779                                  add_ldflags -L/opt/vc/lib/ &&
4780                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4781                                die "ERROR: mmal not found" &&
4782                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4783 enabled omx               && require_header OMX_Core.h
4784 enabled omx_rpi           && { check_header OMX_Core.h ||
4785                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4786                                die "ERROR: OpenMAX IL headers not found"; } && enable omx
4787 enabled openssl           && { { check_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl ||
4788                                  check_pkg_config openssl openssl openssl/ssl.h SSL_library_init; } ||
4789                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4790                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4791                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4792                                die "ERROR: openssl not found"; }
4793
4794 enabled gnutls            && check_lib gmp gmp.h mpz_export -lgmp
4795
4796 if enabled nvenc; then
4797     require_header nvEncodeAPI.h
4798     require_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6"
4799 fi
4800
4801 # SDL is "special" and adds some CFLAGS that should not pollute anything else.
4802 if enabled avplay; then
4803     CFLAGS_SAVE=$CFLAGS
4804     check_pkg_config sdl "sdl >= 1.2.1 sdl < 1.3.0" SDL_events.h SDL_PollEvent &&
4805     sdl_cflags=$pkg_cflags
4806     CFLAGS=$CFLAGS_SAVE
4807 fi
4808
4809 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4810 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4811
4812 check_header linux/fb.h
4813 check_header linux/videodev2.h
4814 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4815
4816 check_header AVFoundation/AVFoundation.h
4817
4818 check_header sys/videoio.h
4819
4820 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4821 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4822 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4823 # w32api 3.12 had it defined wrong
4824 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4825
4826 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4827 { check_header dev/bktr/ioctl_meteor.h &&
4828   check_header dev/bktr/ioctl_bt848.h; } ||
4829 { check_header machine/ioctl_meteor.h &&
4830   check_header machine/ioctl_bt848.h; } ||
4831 { check_header dev/video/meteor/ioctl_meteor.h &&
4832