build: Map -Wall compiler flag to -W3 for MSVC and -Wextra to -W4
[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-libkvazaar        HEVC video encoding
207   --enable-libmp3lame        MP3 audio encoding
208   --enable-libopencore-amrnb AMR-NB audio encoding/decoding
209   --enable-libopencore-amrwb AMR-WB audio decoding
210   --enable-libopencv         computer vision
211   --enable-libopenh264       H.264 video encoding/decoding
212   --enable-libopenjpeg       JPEG 2000 image encoding/decoding
213   --enable-libopus           Opus audio encoding/decoding
214   --enable-libpulse          Pulseaudio sound server
215   --enable-librtmp           RTMP streaming
216   --enable-libschroedinger   Dirac video encoding/decoding
217   --enable-libsnappy         snappy compression
218   --enable-libspeex          Speex audio encoding/decoding
219   --enable-libtheora         Theora video encoding/decoding
220   --enable-libtwolame        MP2 audio encoding
221   --enable-libvo-aacenc      AAC audio encoding
222   --enable-libvo-amrwbenc    AMR-WB audio encoding
223   --enable-libvorbis         Vorbis audio encoding/decoding
224   --enable-libvpx            VP* video encoding/decoding
225   --enable-libwavpack        Wavpack audio encoding/decoding
226   --enable-libwebp           WebP image encoding/decoding
227   --enable-libx264           H.264 video encoding
228   --enable-libx265           HEVC video encoding
229   --enable-libxavs           Chinese AVS video encoding
230   --enable-libxcb            X window system protocol communication
231   --enable-libxcb-shm        X11 shm communication [auto]
232   --enable-libxcb-xfixes     X11 mouse rendering [auto]
233   --enable-libxvid           MPEG-4 ASP video encoding
234   --enable-openssl           crypto
235   --enable-zlib              compression [autodetect]
236
237   The following libraries provide various hardware acceleration features:
238   --enable-cuda    Nvidia CUDA (dynamically linked)
239   --enable-d3d11va Microsoft Direct3D 11 video acceleration [auto]
240   --enable-dxva2   Microsoft DirectX 9 video acceleration [auto]
241   --enable-libmfx  Intel MediaSDK (AKA Quick Sync Video)
242   --enable-libnpp  Nvidia CUDA processing
243   --enable-mmal    Broadcom Multi-Media Abstraction Layer (Raspberry Pi)
244   --enable-nvenc   Nvidia video encoding
245   --enable-omx     OpenMAX IL
246   --enable-omx-rpi OpenMAX IL for Raspberry Pi
247   --enable-vaapi   Video Acceleration API (mainly Unix/Intel)
248   --enable-vda     Apple Video Decode Acceleration [auto]
249   --enable-vdpau   Nvidia Video Decode and Presentation API for Unix [auto]
250
251 Toolchain options:
252   --arch=ARCH              select architecture [$arch]
253   --cpu=CPU                select the minimum required CPU (affects
254                            instruction selection, may crash on older CPUs)
255   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
256   --enable-cross-compile   assume a cross-compiler is used
257   --sysroot=PATH           root of cross-build tree
258   --sysinclude=PATH        location of cross-build system headers
259   --target-os=OS           compiler targets OS [$target_os]
260   --target-exec=CMD        command to run executables on target
261   --target-path=DIR        path to view of build directory on target
262   --target-samples=DIR     path to samples directory on target
263   --toolchain=NAME         set tool defaults according to NAME
264   --nm=NM                  use nm tool
265   --ar=AR                  use archive tool AR [$ar_default]
266   --as=AS                  use assembler AS [$as_default]
267   --cc=CC                  use C compiler CC [$cc_default]
268   --objcc=OCC              use ObjC compiler OCC [$cc_default]
269   --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
270   --ld=LD                  use linker LD
271   --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
272   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
273   --host-cc=HOSTCC         use host C compiler HOSTCC
274   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
275   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
276   --host-ld=HOSTLD         use host linker HOSTLD
277   --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
278   --host-libs=HLIBS        use libs HLIBS when linking for host
279   --host-os=OS             compiler host OS [$target_os]
280   --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
281   --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
282   --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
283   --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
284   --extra-libs=ELIBS       add ELIBS [$ELIBS]
285   --extra-version=STRING   version string suffix []
286   --optflags=OPTFLAGS      override optimization-related compiler flags
287   --enable-pic             build position-independent code
288   --enable-thumb           compile for Thumb instruction set
289   --enable-lto             use link-time optimization
290   --env="ENV=override"     override the environment variables
291
292 Advanced options (experts only):
293   --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
294   --custom-allocator=NAME  use a supported custom allocator
295   --disable-symver         disable symbol versioning
296   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
297   --disable-safe-bitstream-reader
298                            disable buffer boundary checking in bitreaders
299                            (faster, but may crash)
300   --enable-sram            allow use of on-chip SRAM
301
302 Optimization options (experts only):
303   --disable-asm            disable all assembly optimizations
304   --disable-altivec        disable AltiVec optimizations
305   --disable-vsx            disable VSX optimizations
306   --disable-power8         disable POWER8 optimizations
307   --disable-amd3dnow       disable 3DNow! optimizations
308   --disable-amd3dnowext    disable 3DNow! extended optimizations
309   --disable-mmx            disable MMX optimizations
310   --disable-mmxext         disable MMXEXT optimizations
311   --disable-sse            disable SSE optimizations
312   --disable-sse2           disable SSE2 optimizations
313   --disable-sse3           disable SSE3 optimizations
314   --disable-ssse3          disable SSSE3 optimizations
315   --disable-sse4           disable SSE4 optimizations
316   --disable-sse42          disable SSE4.2 optimizations
317   --disable-avx            disable AVX optimizations
318   --disable-xop            disable XOP optimizations
319   --disable-fma3           disable FMA3 optimizations
320   --disable-fma4           disable FMA4 optimizations
321   --disable-avx2           disable AVX2 optimizations
322   --disable-armv5te        disable armv5te optimizations
323   --disable-armv6          disable armv6 optimizations
324   --disable-armv6t2        disable armv6t2 optimizations
325   --disable-vfp            disable VFP optimizations
326   --disable-neon           disable NEON optimizations
327   --disable-inline-asm     disable use of inline assembly
328   --disable-yasm           disable use of nasm/yasm assembly
329
330 Developer options (useful when working on Libav itself):
331   --disable-debug          disable debugging symbols
332   --enable-debug=LEVEL     set the debug level [$debuglevel]
333   --disable-optimizations  disable compiler optimizations
334   --enable-extra-warnings  enable more compiler warnings
335   --samples=PATH           location of test samples for FATE, if not set use
336                            \$LIBAV_SAMPLES at make invocation time.
337   --enable-neon-clobber-test check NEON registers for clobbering (should be
338                            used only for debugging purposes)
339   --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
340                            should be used only for debugging purposes)
341   --enable-random          randomly enable/disable components
342   --disable-random
343   --enable-random=LIST     randomly enable/disable specific components or
344   --disable-random=LIST    component groups. LIST is a comma-separated list
345                            of NAME[:PROB] entries where NAME is a component
346                            (group) and PROB the probability associated with
347                            NAME (default 0.5).
348   --random-seed=VALUE      seed value for --enable/disable-random
349   --disable-valgrind-backtrace do not print a backtrace under Valgrind
350                            (only applies to --disable-optimizations builds)
351   --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
352                            in the name) of tests whose result is ignored
353
354 NOTE: Object files are built at the place where configure is launched.
355 EOF
356   exit 0
357 }
358
359 quotes='""'
360
361 log(){
362     echo "$@" >> $logfile
363 }
364
365 log_file(){
366     log BEGIN $1
367     i=1
368     while read line; do
369         printf '%5s   %s\n' "${i}" "${line}"
370         i=$(($i+1))
371     done < $1 >> $logfile
372     log END $1
373 }
374
375 echolog(){
376     log "$@"
377     echo "$@"
378 }
379
380 warn(){
381     log "WARNING: $*"
382     WARNINGS="${WARNINGS}WARNING: $*\n"
383 }
384
385 die(){
386     echolog "$@"
387     cat <<EOF
388
389 If you think configure made a mistake, make sure you are using the latest
390 version from Git.  If the latest version fails, report the problem to the
391 libav-tools@libav.org mailing list or IRC #libav on irc.freenode.net.
392 EOF
393     if disabled logging; then
394         cat <<EOF
395 Rerun configure with logging enabled (do not use --disable-logging), and
396 include the log this produces with your report.
397 EOF
398     else
399         cat <<EOF
400 Include the log file "$logfile" produced by configure as this will help
401 solving the problem.
402 EOF
403     fi
404     exit 1
405 }
406
407 # Avoid locale weirdness, besides we really just want to translate ASCII.
408 toupper(){
409     echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
410 }
411
412 tolower(){
413     echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
414 }
415
416 c_escape(){
417     echo "$*" | sed 's/["\\]/\\\0/g'
418 }
419
420 sh_quote(){
421     v=$(echo "$1" | sed "s/'/'\\\\''/g")
422     test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
423     echo "$v"
424 }
425
426 cleanws(){
427     echo "$@" | sed 's/^ *//;s/  */ /g;s/ *$//'
428 }
429
430 filter(){
431     pat=$1
432     shift
433     for v; do
434         eval "case $v in $pat) printf '%s ' $v ;; esac"
435     done
436 }
437
438 filter_out(){
439     pat=$1
440     shift
441     for v; do
442         eval "case $v in $pat) ;; *) printf '%s ' $v ;; esac"
443     done
444 }
445
446 map(){
447     m=$1
448     shift
449     for v; do eval $m; done
450 }
451
452 add_suffix(){
453     suffix=$1
454     shift
455     for v; do echo ${v}${suffix}; done
456 }
457
458 set_all(){
459     value=$1
460     shift
461     for var in $*; do
462         eval $var=$value
463     done
464 }
465
466 set_weak(){
467     value=$1
468     shift
469     for var; do
470         eval : \${$var:=$value}
471     done
472 }
473
474 sanitize_var_name(){
475     echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
476 }
477
478 set_safe(){
479     var=$1
480     shift
481     eval $(sanitize_var_name "$var")='$*'
482 }
483
484 get_safe(){
485     eval echo \$$(sanitize_var_name "$1")
486 }
487
488 pushvar(){
489     for pvar in $*; do
490         eval level=\${${pvar}_level:=0}
491         eval ${pvar}_${level}="\$$pvar"
492         eval ${pvar}_level=$(($level+1))
493     done
494 }
495
496 popvar(){
497     for pvar in $*; do
498         eval level=\${${pvar}_level:-0}
499         test $level = 0 && continue
500         eval level=$(($level-1))
501         eval $pvar="\${${pvar}_${level}}"
502         eval ${pvar}_level=$level
503         eval unset ${pvar}_${level}
504     done
505 }
506
507 enable(){
508     set_all yes $*
509 }
510
511 disable(){
512     set_all no $*
513 }
514
515 enable_weak(){
516     set_weak yes $*
517 }
518
519 disable_weak(){
520     set_weak no $*
521 }
522
523 enable_safe(){
524     for var; do
525         enable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
526     done
527 }
528
529 disable_safe(){
530     for var; do
531         disable $(echo "$var" | sed 's/[^A-Za-z0-9_]/_/g')
532     done
533 }
534
535 do_enable_deep(){
536     for var; do
537         enabled $var && continue
538         eval sel="\$${var}_select"
539         eval sgs="\$${var}_suggest"
540         pushvar var sgs
541         enable_deep $sel
542         popvar sgs
543         enable_deep_weak $sgs
544         popvar var
545     done
546 }
547
548 enable_deep(){
549     do_enable_deep $*
550     enable $*
551 }
552
553 enable_deep_weak(){
554     for var; do
555         disabled $var && continue
556         pushvar var
557         do_enable_deep $var
558         popvar var
559         enable_weak $var
560     done
561 }
562
563 enabled(){
564     test "${1#!}" = "$1" && op== || op=!=
565     eval test "x\$${1#!}" $op "xyes"
566 }
567
568 disabled(){
569     test "${1#!}" = "$1" && op== || op=!=
570     eval test "x\$${1#!}" $op "xno"
571 }
572
573 enabled_all(){
574     for opt; do
575         enabled $opt || return 1
576     done
577 }
578
579 disabled_all(){
580     for opt; do
581         disabled $opt || return 1
582     done
583 }
584
585 enabled_any(){
586     for opt; do
587         enabled $opt && return 0
588     done
589 }
590
591 disabled_any(){
592     for opt; do
593         disabled $opt && return 0
594     done
595     return 1
596 }
597
598 set_default(){
599     for opt; do
600         eval : \${$opt:=\$${opt}_default}
601     done
602 }
603
604 is_in(){
605     value=$1
606     shift
607     for var in $*; do
608         [ $var = $value ] && return 0
609     done
610     return 1
611 }
612
613 do_check_deps(){
614     for cfg; do
615         cfg="${cfg#!}"
616         enabled ${cfg}_checking && die "Circular dependency for $cfg."
617         disabled ${cfg}_checking && continue
618         enable ${cfg}_checking
619         append allopts $cfg
620
621         eval dep_all="\$${cfg}_deps"
622         eval dep_any="\$${cfg}_deps_any"
623         eval dep_sel="\$${cfg}_select"
624         eval dep_sgs="\$${cfg}_suggest"
625         eval dep_ifa="\$${cfg}_if"
626         eval dep_ifn="\$${cfg}_if_any"
627
628         pushvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
629         do_check_deps $dep_all $dep_any $dep_sel $dep_sgs $dep_ifa $dep_ifn
630         popvar cfg dep_all dep_any dep_sel dep_sgs dep_ifa dep_ifn
631
632         [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
633         [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
634         enabled_all  $dep_all || disable $cfg
635         enabled_any  $dep_any || disable $cfg
636         disabled_any $dep_sel && disable $cfg
637
638         if enabled $cfg; then
639             enable_deep $dep_sel
640             enable_deep_weak $dep_sgs
641         fi
642
643         disable ${cfg}_checking
644     done
645 }
646
647 check_deps(){
648     unset allopts
649
650     do_check_deps "$@"
651
652     for cfg in $allopts; do
653         enabled $cfg || continue
654         eval dep_extralibs="\$${cfg}_extralibs"
655         test -n "$dep_extralibs" && add_extralibs $dep_extralibs
656     done
657 }
658
659 print_config(){
660     pfx=$1
661     files=$2
662     shift 2
663     map 'eval echo "$v \${$v:-no}"' "$@" |
664     awk "BEGIN { split(\"$files\", files) }
665         {
666             c = \"$pfx\" toupper(\$1);
667             v = \$2;
668             sub(/yes/, 1, v);
669             sub(/no/,  0, v);
670             for (f in files) {
671                 file = files[f];
672                 if (file ~ /\\.h\$/) {
673                     printf(\"#define %s %d\\n\", c, v) >>file;
674                 } else if (file ~ /\\.asm\$/) {
675                     printf(\"%%define %s %d\\n\", c, v) >>file;
676                 } else if (file ~ /\\.mak\$/) {
677                     n = -v ? \"\" : \"!\";
678                     printf(\"%s%s=yes\\n\", n, c) >>file;
679                 }
680             }
681         }"
682 }
683
684 print_enabled(){
685     suf=$1
686     shift
687     for v; do
688         enabled $v && printf "%s\n" ${v%$suf}
689     done
690 }
691
692 append(){
693     var=$1
694     shift
695     eval "$var=\"\$$var $*\""
696 }
697
698 prepend(){
699     var=$1
700     shift
701     eval "$var=\"$* \$$var\""
702 }
703
704 unique(){
705     var=$1
706     uniq_list=""
707     for tok in $(eval echo \$$var); do
708         uniq_list="$(filter_out $tok $uniq_list) $tok"
709     done
710     eval "$var=\"${uniq_list}\""
711 }
712
713 add_cppflags(){
714     append CPPFLAGS "$@"
715 }
716
717 add_cflags(){
718     append CFLAGS $($cflags_filter "$@")
719 }
720
721 add_cflags_headers(){
722     append CFLAGS_HEADERS $($cflags_filter "$@")
723 }
724
725 add_asflags(){
726     append ASFLAGS $($asflags_filter "$@")
727 }
728
729 add_objcflags(){
730     append OBJCFLAGS $($objcflags_filter "$@")
731 }
732
733 add_ldflags(){
734     append LDFLAGS $($ldflags_filter "$@")
735 }
736
737 add_ldexeflags(){
738     append LDEXEFLAGS $($ldflags_filter "$@")
739 }
740
741 add_stripflags(){
742     append STRIPFLAGS "$@"
743 }
744
745 add_extralibs(){
746     prepend extralibs $($ldflags_filter "$@")
747 }
748
749 add_host_cppflags(){
750     append host_cppflags "$@"
751 }
752
753 add_host_cflags(){
754     append host_cflags $($host_cflags_filter "$@")
755 }
756
757 add_host_ldflags(){
758     append host_ldflags $($host_ldflags_filter "$@")
759 }
760
761 add_compat(){
762     append compat_objs $1
763     shift
764     map 'add_cppflags -D$v' "$@"
765 }
766
767 check_cmd(){
768     log "$@"
769     "$@" >> $logfile 2>&1
770 }
771
772 cc_o(){
773     eval printf '%s\\n' $CC_O
774 }
775
776 cc_e(){
777     eval printf '%s\\n' $CC_E
778 }
779
780 check_cc(){
781     log check_cc "$@"
782     cat > $TMPC
783     log_file $TMPC
784     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
785 }
786
787 check_objcc(){
788     log check_objcc "$@"
789     cat > $TMPC
790     log_file $TMPC
791     check_cmd $objcc $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPC
792 }
793
794 check_cpp(){
795     log check_cpp "$@"
796     cat > $TMPC
797     log_file $TMPC
798     check_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
799 }
800
801 as_o(){
802     eval printf '%s\\n' $AS_O
803 }
804
805 check_as(){
806     log check_as "$@"
807     cat > $TMPS
808     log_file $TMPS
809     check_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
810 }
811
812 check_inline_asm(){
813     log check_inline_asm "$@"
814     name="$1"
815     code="$2"
816     shift 2
817     disable $name
818     check_cc "$@" <<EOF && enable $name
819 void foo(void){ __asm__ volatile($code); }
820 EOF
821 }
822
823 check_insn(){
824     log check_insn "$@"
825     check_inline_asm ${1}_inline "\"$2\""
826     echo "$2" | check_as && enable ${1}_external || disable ${1}_external
827 }
828
829 check_yasm(){
830     log check_yasm "$@"
831     echo "$1" > $TMPS
832     log_file $TMPS
833     shift 1
834     check_cmd $yasmexe $YASMFLAGS "$@" -o $TMPO $TMPS
835 }
836
837 ld_o(){
838     eval printf '%s\\n' $LD_O
839 }
840
841 check_ld(){
842     log check_ld "$@"
843     flags=$(filter_out '-l*' "$@")
844     libs=$(filter '-l*' "$@")
845     check_cc $($cflags_filter $flags) || return
846     flags=$($ldflags_filter $flags)
847     libs=$($ldflags_filter $libs)
848     check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
849 }
850
851 print_include(){
852     hdr=$1
853     test "${hdr%.h}" = "${hdr}" &&
854         echo "#include $hdr"    ||
855         echo "#include <$hdr>"
856 }
857
858 check_code(){
859     log check_code "$@"
860     check=$1
861     headers=$2
862     code=$3
863     shift 3
864     {
865         for hdr in $headers; do
866             print_include $hdr
867         done
868         echo "int main(void) { $code; return 0; }"
869     } | check_$check "$@"
870 }
871
872 check_cppflags(){
873     log check_cppflags "$@"
874     check_cpp "$@" <<EOF && append CPPFLAGS "$@"
875 int x;
876 EOF
877 }
878
879 test_cflags(){
880     log test_cflags "$@"
881     set -- $($cflags_filter "$@")
882     check_cc "$@" <<EOF
883 int x;
884 EOF
885 }
886
887 check_cflags(){
888     log check_cflags "$@"
889     test_cflags "$@" && add_cflags "$@"
890 }
891
892 test_objcflags(){
893     log test_objcflags "$@"
894     set -- $($objcflags_filter "$@")
895     check_objcc "$@" <<EOF
896 int x;
897 EOF
898 }
899
900 check_objcflags(){
901     log check_objcflags "$@"
902     test_objcflags "$@" && add_objcflags "$@"
903 }
904
905 test_ldflags(){
906     log test_ldflags "$@"
907     check_ld "$@" <<EOF
908 int main(void){ return 0; }
909 EOF
910 }
911
912 check_ldflags(){
913     log check_ldflags "$@"
914     test_ldflags "$@" && add_ldflags "$@"
915 }
916
917 test_stripflags(){
918     log test_stripflags "$@"
919     # call check_cc to get a fresh TMPO
920     check_cc <<EOF
921 int main(void) { return 0; }
922 EOF
923     check_cmd $strip $STRIPFLAGS "$@" $TMPO
924 }
925
926 check_stripflags(){
927     log check_stripflags "$@"
928     test_stripflags "$@" && add_stripflags "$@"
929 }
930
931 check_header(){
932     log check_header "$@"
933     header=$1
934     shift
935     disable_safe $header
936     check_cpp "$@" <<EOF && enable_safe $header
937 #include <$header>
938 int x;
939 EOF
940 }
941
942 check_func(){
943     log check_func "$@"
944     func=$1
945     shift
946     disable $func
947     check_ld "$@" <<EOF && enable $func
948 extern int $func();
949 int main(void){ $func(); }
950 EOF
951 }
952
953 check_mathfunc(){
954     log check_mathfunc "$@"
955     func=$1
956     narg=$2
957     shift 2
958     test $narg = 2 && args="f, g" || args="f"
959     disable $func
960     check_ld "$@" <<EOF && enable $func
961 #include <math.h>
962 float foo(float f, float g) { return $func($args); }
963 int main(void){ return 0; }
964 EOF
965 }
966
967 check_func_headers(){
968     log check_func_headers "$@"
969     headers=$1
970     funcs=$2
971     shift 2
972     {
973         for hdr in $headers; do
974             print_include $hdr
975         done
976         for func in $funcs; do
977             echo "long check_$func(void) { return (long) $func; }"
978         done
979         echo "int main(void) { return 0; }"
980     } | check_ld "$@" && enable $funcs && enable_safe $headers
981 }
982
983 check_cpp_condition(){
984     log check_cpp_condition "$@"
985     header=$1
986     condition=$2
987     shift 2
988     check_cpp "$@" <<EOF
989 #include <$header>
990 #if !($condition)
991 #error "unsatisfied condition: $condition"
992 #endif
993 EOF
994 }
995
996 test_cflags_cpp(){
997     log test_cflags_cpp "$@"
998     flags=$1
999     condition=$2
1000     shift 2
1001     set -- $($cflags_filter "$flags")
1002     check_cpp "$@" <<EOF
1003 #if !($condition)
1004 #error "unsatisfied condition: $condition"
1005 #endif
1006 EOF
1007 }
1008
1009 check_lib(){
1010     log check_lib "$@"
1011     name="$1"
1012     headers="$2"
1013     funcs="$3"
1014     shift 3
1015     disable $name
1016     check_func_headers "$headers" "$funcs" "$@" &&
1017         enable $name && add_extralibs "$@"
1018 }
1019
1020 check_pkg_config(){
1021     log check_pkg_config "$@"
1022     pkg_version="$1"
1023     pkg="${1%% *}"
1024     headers="$2"
1025     funcs="$3"
1026     shift 3
1027     check_cmd $pkg_config --exists --print-errors $pkg_version || return
1028     pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
1029     pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
1030     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
1031         set_safe "${pkg}_cflags"    $pkg_cflags &&
1032         set_safe "${pkg}_extralibs" $pkg_libs
1033 }
1034
1035 check_exec(){
1036     check_ld "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
1037 }
1038
1039 check_exec_crash(){
1040     log check_exec_crash "$@"
1041     code=$(cat)
1042
1043     # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
1044     # are safe but may not be available everywhere.  Thus we use
1045     # raise(SIGTERM) instead.  The check is run in a subshell so we
1046     # can redirect the "Terminated" message from the shell.  SIGBUS
1047     # is not defined by standard C so it is used conditionally.
1048
1049     (check_exec "$@") >> $logfile 2>&1 <<EOF
1050 #include <signal.h>
1051 static void sighandler(int sig){
1052     raise(SIGTERM);
1053 }
1054 int foo(void){
1055     $code
1056 }
1057 int (*func_ptr)(void) = foo;
1058 int main(void){
1059     signal(SIGILL, sighandler);
1060     signal(SIGFPE, sighandler);
1061     signal(SIGSEGV, sighandler);
1062 #ifdef SIGBUS
1063     signal(SIGBUS, sighandler);
1064 #endif
1065     return func_ptr();
1066 }
1067 EOF
1068 }
1069
1070 check_type(){
1071     log check_type "$@"
1072     headers=$1
1073     type=$2
1074     shift 2
1075     disable_safe "$type"
1076     check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
1077 }
1078
1079 check_struct(){
1080     log check_struct "$@"
1081     headers=$1
1082     struct=$2
1083     member=$3
1084     shift 3
1085     disable_safe "${struct}_${member}"
1086     check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
1087         enable_safe "${struct}_${member}"
1088 }
1089
1090 check_builtin(){
1091     log check_builtin "$@"
1092     name=$1
1093     headers=$2
1094     builtin=$3
1095     shift 3
1096     disable "$name"
1097     check_code ld "$headers" "$builtin" "$@" && enable "$name"
1098 }
1099
1100 check_compile_assert(){
1101     log check_compile_assert "$@"
1102     name=$1
1103     headers=$2
1104     condition=$3
1105     shift 3
1106     disable "$name"
1107     check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
1108 }
1109
1110 require(){
1111     log require "$@"
1112     name_version="$1"
1113     name="${1%% *}"
1114     headers="$2"
1115     func="$3"
1116     shift 3
1117     check_lib $name "$headers" $func "$@" || die "ERROR: $name_version not found"
1118 }
1119
1120 require_pkg_config(){
1121     log require_pkg_config "$@"
1122     pkg_version="$1"
1123     pkg="${1%% *}"
1124     check_pkg_config "$@" || die "ERROR: $pkg_version not found"
1125     add_cflags    $(get_safe "${pkg}_cflags")
1126     add_extralibs $(get_safe "${pkg}_extralibs")
1127 }
1128
1129 hostcc_e(){
1130     eval printf '%s\\n' $HOSTCC_E
1131 }
1132
1133 hostcc_o(){
1134     eval printf '%s\\n' $HOSTCC_O
1135 }
1136
1137 check_host_cc(){
1138     log check_host_cc "$@"
1139     cat > $TMPC
1140     log_file $TMPC
1141     check_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
1142 }
1143
1144 check_host_cpp(){
1145     log check_host_cpp "$@"
1146     cat > $TMPC
1147     log_file $TMPC
1148     check_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
1149 }
1150
1151 check_host_cppflags(){
1152     log check_host_cppflags "$@"
1153     check_host_cpp "$@" <<EOF && append host_cppflags "$@"
1154 int x;
1155 EOF
1156 }
1157
1158 check_host_cflags(){
1159     log check_host_cflags "$@"
1160     set -- $($host_cflags_filter "$@")
1161     check_host_cc "$@" <<EOF && append host_cflags "$@"
1162 int x;
1163 EOF
1164 }
1165
1166 check_host_cpp_condition(){
1167     log check_host_cpp_condition "$@"
1168     header=$1
1169     condition=$2
1170     shift 2
1171     check_host_cpp "$@" <<EOF
1172 #include <$header>
1173 #if !($condition)
1174 #error "unsatisfied condition: $condition"
1175 #endif
1176 EOF
1177 }
1178
1179 apply(){
1180     file=$1
1181     shift
1182     "$@" < "$file" > "$file.tmp" && mv "$file.tmp" "$file" || rm "$file.tmp"
1183 }
1184
1185 cp_if_changed(){
1186     cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
1187     mkdir -p "$(dirname $2)"
1188     cp -f "$1" "$2"
1189 }
1190
1191 # CONFIG_LIST contains configurable options, while HAVE_LIST is for
1192 # system-dependent things.
1193
1194 AVCODEC_COMPONENTS="
1195     bsfs
1196     decoders
1197     encoders
1198     hwaccels
1199     parsers
1200 "
1201
1202 AVDEVICE_COMPONENTS="
1203     indevs
1204     outdevs
1205 "
1206 AVFILTER_COMPONENTS="
1207     filters
1208 "
1209 AVFORMAT_COMPONENTS="
1210     demuxers
1211     muxers
1212     protocols
1213 "
1214
1215 AVRESAMPLE_COMPONENTS=""
1216 AVUTIL_COMPONENTS=""
1217
1218 COMPONENT_LIST="
1219     $AVCODEC_COMPONENTS
1220     $AVDEVICE_COMPONENTS
1221     $AVFILTER_COMPONENTS
1222     $AVFORMAT_COMPONENTS
1223     $AVRESAMPLE_COMPONENTS
1224     $AVUTIL_COMPONENTS
1225 "
1226
1227 EXAMPLE_LIST="
1228     decode_audio_example
1229     decode_video_example
1230     encode_audio_example
1231     encode_video_example
1232     filter_audio_example
1233     metadata_example
1234     output_example
1235     qsvdec_example
1236     transcode_aac_example
1237 "
1238
1239 HWACCEL_LIBRARY_NONFREE_LIST="
1240     cuda
1241     libnpp
1242 "
1243 HWACCEL_LIBRARY_LIST="
1244     $HWACCEL_LIBRARY_NONFREE_LIST
1245     d3d11va
1246     dxva2
1247     libmfx
1248     mmal
1249     nvenc
1250     omx
1251     vaapi
1252     vda
1253     vdpau
1254 "
1255
1256 EXTERNAL_LIBRARY_GPL_LIST="
1257     libcdio
1258     libx264
1259     libx265
1260     libxavs
1261     libxvid
1262 "
1263
1264 EXTERNAL_LIBRARY_NONFREE_LIST="
1265     libfaac
1266     libfdk_aac
1267     openssl
1268 "
1269
1270 EXTERNAL_LIBRARY_VERSION3_LIST="
1271     libopencore_amrnb
1272     libopencore_amrwb
1273     libvo_aacenc
1274     libvo_amrwbenc
1275 "
1276
1277 EXTERNAL_LIBRARY_LIST="
1278     $EXTERNAL_LIBRARY_GPL_LIST
1279     $EXTERNAL_LIBRARY_NONFREE_LIST
1280     $EXTERNAL_LIBRARY_VERSION3_LIST
1281     avisynth
1282     avxsynth
1283     bzlib
1284     frei0r
1285     gnutls
1286     libbs2b
1287     libdc1394
1288     libdcadec
1289     libfontconfig
1290     libfreetype
1291     libgsm
1292     libhdcd
1293     libilbc
1294     libkvazaar
1295     libmp3lame
1296     libopencv
1297     libopenh264
1298     libopenjpeg
1299     libopus
1300     libpulse
1301     librtmp
1302     libschroedinger
1303     libsnappy
1304     libspeex
1305     libtheora
1306     libtwolame
1307     libvorbis
1308     libvpx
1309     libwavpack
1310     libwebp
1311     libxcb
1312     libxcb_shm
1313     libxcb_xfixes
1314     zlib
1315 "
1316
1317 FEATURE_LIST="
1318     gray
1319     hardcoded_tables
1320     omx_rpi
1321     runtime_cpudetect
1322     safe_bitstream_reader
1323     shared
1324     small
1325     sram
1326     static
1327     swscale_alpha
1328 "
1329
1330 LIBRARY_LIST="
1331     avcodec
1332     avdevice
1333     avfilter
1334     avformat
1335     avresample
1336     avutil
1337     swscale
1338 "
1339
1340 LICENSE_LIST="
1341     gpl
1342     nonfree
1343     version3
1344 "
1345
1346 PROGRAM_LIST="
1347     avconv
1348     avplay
1349     avprobe
1350 "
1351
1352 SUBSYSTEM_LIST="
1353     dct
1354     doc
1355     error_resilience
1356     faan
1357     fft
1358     lsp
1359     lzo
1360     mdct
1361     network
1362     rdft
1363 "
1364
1365 # COMPONENT_LIST needs to come last to ensure correct dependency checking
1366 CONFIG_LIST="
1367     $EXAMPLE_LIST
1368     $EXTERNAL_LIBRARY_LIST
1369     $HWACCEL_LIBRARY_LIST
1370     $FEATURE_LIST
1371     $LICENSE_LIST
1372     $LIBRARY_LIST
1373     $PROGRAM_LIST
1374     $SUBSYSTEM_LIST
1375     neon_clobber_test
1376     pic
1377     pod2man
1378     texi2html
1379     thumb
1380     valgrind_backtrace
1381     xmm_clobber_test
1382     $COMPONENT_LIST
1383 "
1384
1385 THREADS_LIST="
1386     pthreads
1387     w32threads
1388 "
1389
1390 ATOMICS_LIST="
1391     atomics_gcc
1392     atomics_suncc
1393     atomics_win32
1394 "
1395
1396 ARCH_LIST="
1397     aarch64
1398     alpha
1399     arm
1400     avr32
1401     avr32_ap
1402     avr32_uc
1403     bfin
1404     ia64
1405     m68k
1406     mips
1407     mips64
1408     parisc
1409     ppc
1410     ppc64
1411     s390
1412     sh4
1413     sparc
1414     sparc64
1415     tilegx
1416     tilepro
1417     tomi
1418     x86
1419     x86_32
1420     x86_64
1421 "
1422
1423 ARCH_EXT_LIST_ARM="
1424     armv5te
1425     armv6
1426     armv6t2
1427     armv8
1428     neon
1429     vfp
1430     vfpv3
1431 "
1432
1433 ARCH_EXT_LIST_X86_SIMD="
1434     amd3dnow
1435     amd3dnowext
1436     avx
1437     avx2
1438     fma3
1439     fma4
1440     mmx
1441     mmxext
1442     sse
1443     sse2
1444     sse3
1445     sse4
1446     sse42
1447     ssse3
1448     xop
1449 "
1450
1451 ARCH_EXT_LIST_PPC="
1452     altivec
1453     dcbzl
1454     ldbrx
1455     power8
1456     ppc4xx
1457     vsx
1458 "
1459
1460 ARCH_EXT_LIST_X86="
1461     $ARCH_EXT_LIST_X86_SIMD
1462     cpunop
1463     i686
1464 "
1465
1466 ARCH_EXT_LIST_MIPS="
1467     loongson
1468     mips32r1
1469     mips64r1
1470     mips32r2
1471     mips64r2
1472     mips32r6
1473     mips64r6
1474 "
1475
1476 ARCH_EXT_LIST="
1477     $ARCH_EXT_LIST_ARM
1478     $ARCH_EXT_LIST_MIPS
1479     $ARCH_EXT_LIST_PPC
1480     $ARCH_EXT_LIST_X86
1481     vis
1482 "
1483
1484 ARCH_FEATURES="
1485     aligned_stack
1486     fast_64bit
1487     fast_clz
1488     fast_cmov
1489     local_aligned_8
1490     local_aligned_16
1491     local_aligned_32
1492     simd_align_16
1493     simd_align_32
1494 "
1495
1496 BUILTIN_LIST="
1497     atomic_cas_ptr
1498     machine_rw_barrier
1499     MemoryBarrier
1500     mm_empty
1501     rdtsc
1502     sem_timedwait
1503     sync_val_compare_and_swap
1504 "
1505 HAVE_LIST_CMDLINE="
1506     inline_asm
1507     symver
1508     yasm
1509 "
1510
1511 HAVE_LIST_PUB="
1512     bigendian
1513     fast_unaligned
1514 "
1515
1516 HEADERS_LIST="
1517     AVFoundation_AVFoundation_h
1518     alsa_asoundlib_h
1519     altivec_h
1520     arpa_inet_h
1521     cdio_paranoia_h
1522     cdio_paranoia_paranoia_h
1523     d3d11_h
1524     dispatch_dispatch_h
1525     dev_bktr_ioctl_bt848_h
1526     dev_bktr_ioctl_meteor_h
1527     dev_ic_bt8xx_h
1528     dev_video_bktr_ioctl_bt848_h
1529     dev_video_meteor_ioctl_meteor_h
1530     direct_h
1531     dlfcn_h
1532     dxva_h
1533     gsm_h
1534     io_h
1535     mach_mach_time_h
1536     machine_ioctl_bt848_h
1537     machine_ioctl_meteor_h
1538     malloc_h
1539     poll_h
1540     sndio_h
1541     soundcard_h
1542     stdatomic_h
1543     sys_mman_h
1544     sys_param_h
1545     sys_resource_h
1546     sys_select_h
1547     sys_soundcard_h
1548     sys_time_h
1549     sys_un_h
1550     sys_videoio_h
1551     unistd_h
1552     valgrind_valgrind_h
1553     windows_h
1554     winsock2_h
1555 "
1556
1557 INTRINSICS_LIST="
1558     intrinsics_neon
1559 "
1560
1561 MATH_FUNCS="
1562     atanf
1563     atan2f
1564     cbrtf
1565     cosf
1566     exp2
1567     exp2f
1568     expf
1569     isinf
1570     isnan
1571     ldexpf
1572     llrint
1573     llrintf
1574     log2
1575     log2f
1576     log10f
1577     lrint
1578     lrintf
1579     powf
1580     rint
1581     round
1582     roundf
1583     sinf
1584     trunc
1585     truncf
1586 "
1587
1588 SYSTEM_FUNCS="
1589     aligned_malloc
1590     clock_gettime
1591     closesocket
1592     CommandLineToArgvW
1593     CoTaskMemFree
1594     CryptGenRandom
1595     dlopen
1596     fcntl
1597     flt_lim
1598     fork
1599     getaddrinfo
1600     gethrtime
1601     getopt
1602     GetProcessAffinityMask
1603     GetProcessMemoryInfo
1604     GetProcessTimes
1605     getrusage
1606     GetSystemTimeAsFileTime
1607     gettimeofday
1608     gmtime_r
1609     inet_aton
1610     isatty
1611     jack_port_get_latency_range
1612     LoadLibrary
1613     localtime_r
1614     mach_absolute_time
1615     MapViewOfFile
1616     memalign
1617     mkstemp
1618     mmap
1619     mprotect
1620     nanosleep
1621     posix_memalign
1622     sched_getaffinity
1623     SetConsoleTextAttribute
1624     setmode
1625     setrlimit
1626     Sleep
1627     strerror_r
1628     sysconf
1629     sysctl
1630     usleep
1631     VirtualAlloc
1632 "
1633
1634 TOOLCHAIN_FEATURES="
1635     as_dn_directive
1636     as_fpu_directive
1637     as_func
1638     as_object_arch
1639     asm_mod_q
1640     attribute_may_alias
1641     attribute_packed
1642     blocks_extension
1643     ebp_available
1644     ebx_available
1645     gnu_as
1646     ibm_asm
1647     inline_asm_labels
1648     pragma_deprecated
1649     symver_asm_label
1650     symver_gnu_asm
1651     vfp_args
1652     xform_asm
1653     xmm_clobbers
1654 "
1655
1656 TYPES_LIST="
1657     CONDITION_VARIABLE_Ptr
1658     socklen_t
1659     struct_addrinfo
1660     struct_group_source_req
1661     struct_ip_mreq_source
1662     struct_ipv6_mreq
1663     struct_pollfd
1664     struct_rusage_ru_maxrss
1665     struct_sockaddr_in6
1666     struct_sockaddr_sa_len
1667     struct_sockaddr_storage
1668     struct_v4l2_frmivalenum_discrete
1669 "
1670
1671 HAVE_LIST="
1672     $ARCH_EXT_LIST
1673     $(add_suffix _external $ARCH_EXT_LIST)
1674     $(add_suffix _inline   $ARCH_EXT_LIST)
1675     $ARCH_FEATURES
1676     $BUILTIN_LIST
1677     $HAVE_LIST_CMDLINE
1678     $HAVE_LIST_PUB
1679     $HEADERS_LIST
1680     $INTRINSICS_LIST
1681     $MATH_FUNCS
1682     $SYSTEM_FUNCS
1683     $THREADS_LIST
1684     $TOOLCHAIN_FEATURES
1685     $TYPES_LIST
1686     dos_paths
1687     dxva2_lib
1688     libc_msvcrt
1689     MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
1690     sdl
1691     section_data_rel_ro
1692     threads
1693     vaapi_drm
1694     vaapi_x11
1695     vdpau_x11
1696 "
1697
1698 # options emitted with CONFIG_ prefix but not available on the command line
1699 CONFIG_EXTRA="
1700     aandcttables
1701     ac3dsp
1702     audio_frame_queue
1703     audiodsp
1704     blockdsp
1705     bswapdsp
1706     cabac
1707     dirac_parse
1708     dvprofile
1709     faandct
1710     faanidct
1711     fdctdsp
1712     flacdsp
1713     fmtconvert
1714     g722dsp
1715     gmp
1716     golomb
1717     gplv3
1718     h263dsp
1719     h264chroma
1720     h264dsp
1721     h264parse
1722     h264pred
1723     h264qpel
1724     hevc_ps
1725     hpeldsp
1726     huffman
1727     huffyuvdsp
1728     huffyuvencdsp
1729     idctdsp
1730     iirfilter
1731     imdct15
1732     intrax8
1733     iso_media
1734     ividsp
1735     jpegtables
1736     libx262
1737     lgplv3
1738     lpc
1739     lzf
1740     me_cmp
1741     mpeg_er
1742     mpegaudio
1743     mpegaudiodsp
1744     mpegaudioheader
1745     mpegvideo
1746     mpegvideoenc
1747     mss34dsp
1748     pixblockdsp
1749     qpeldsp
1750     qsv
1751     qsvdec
1752     qsvenc
1753     rangecoder
1754     riffdec
1755     riffenc
1756     rtpdec
1757     rtpenc_chain
1758     rv34dsp
1759     sinewin
1760     snappy
1761     srtp
1762     startcode
1763     texturedsp
1764     texturedspenc
1765     tpeldsp
1766     vaapi_encode
1767     vc1dsp
1768     videodsp
1769     vp3dsp
1770     vp56dsp
1771     vp8dsp
1772     wma_freqs
1773     wmv2dsp
1774 "
1775
1776 CMDLINE_SELECT="
1777     $ARCH_EXT_LIST
1778     $CONFIG_LIST
1779     $HAVE_LIST_CMDLINE
1780     $THREADS_LIST
1781     asm
1782     cross_compile
1783     debug
1784     extra_warnings
1785     logging
1786     lto
1787     optimizations
1788     rpath
1789 "
1790
1791 PATHS_LIST="
1792     bindir
1793     datadir
1794     docdir
1795     incdir
1796     libdir
1797     mandir
1798     prefix
1799     shlibdir
1800 "
1801
1802 CMDLINE_SET="
1803     $PATHS_LIST
1804     ar
1805     arch
1806     as
1807     cc
1808     objcc
1809     cpu
1810     cross_prefix
1811     custom_allocator
1812     dep_cc
1813     env
1814     extra_version
1815     host_cc
1816     host_cflags
1817     host_extralibs
1818     host_ld
1819     host_ldflags
1820     host_os
1821     ignore_tests
1822     ld
1823     logfile
1824     malloc_prefix
1825     nm
1826     optflags
1827     pkg_config
1828     pkg_config_flags
1829     random_seed
1830     samples
1831     sysinclude
1832     sysroot
1833     target_exec
1834     target_os
1835     target_path
1836     target_samples
1837     toolchain
1838 "
1839
1840 CMDLINE_APPEND="
1841     extra_cflags
1842     extra_objcflags
1843     host_cppflags
1844 "
1845
1846 # code dependency declarations
1847
1848 # architecture extensions
1849
1850 armv5te_deps="arm"
1851 armv6_deps="arm"
1852 armv6t2_deps="arm"
1853 armv8_deps="aarch64"
1854 neon_deps_any="aarch64 arm"
1855 intrinsics_neon_deps="neon"
1856 vfp_deps_any="aarch64 arm"
1857 vfpv3_deps="vfp"
1858
1859 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
1860
1861 altivec_deps="ppc"
1862 ppc4xx_deps="ppc"
1863 vsx_deps="altivec"
1864 power8_deps="vsx"
1865
1866 cpunop_deps="i686"
1867 x86_64_select="i686"
1868 x86_64_suggest="fast_cmov"
1869
1870 amd3dnow_deps="mmx"
1871 amd3dnowext_deps="amd3dnow"
1872 i686_deps="x86"
1873 mmx_deps="x86"
1874 mmxext_deps="mmx"
1875 sse_deps="mmxext"
1876 sse2_deps="sse"
1877 sse3_deps="sse2"
1878 ssse3_deps="sse3"
1879 sse4_deps="ssse3"
1880 sse42_deps="sse4"
1881 avx_deps="sse42"
1882 xop_deps="avx"
1883 fma3_deps="avx"
1884 fma4_deps="avx"
1885 avx2_deps="avx"
1886
1887 mmx_external_deps="yasm"
1888 mmx_inline_deps="inline_asm"
1889 mmx_suggest="mmx_external mmx_inline"
1890
1891 for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
1892     eval dep=\$${ext}_deps
1893     eval ${ext}_external_deps='"${dep}_external"'
1894     eval ${ext}_inline_deps='"${dep}_inline"'
1895     eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
1896 done
1897
1898 aligned_stack_if_any="aarch64 ppc x86"
1899 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
1900 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
1901 fast_unaligned_if_any="aarch64 ppc x86"
1902 simd_align_16_if_any="altivec neon sse"
1903 simd_align_32_if_any="avx"
1904
1905 # system capabilities
1906 symver_if_any="symver_asm_label symver_gnu_asm"
1907 valgrind_backtrace_deps="!optimizations valgrind_valgrind_h"
1908
1909 # threading support
1910 atomics_gcc_if="sync_val_compare_and_swap"
1911 atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
1912 atomics_win32_if="MemoryBarrier"
1913 atomics_native_if_any="$ATOMICS_LIST"
1914 w32threads_deps="atomics_native"
1915 threads_if_any="$THREADS_LIST"
1916
1917 # subsystems
1918 dct_select="rdft"
1919 dirac_parse_select="golomb"
1920 error_resilience_select="me_cmp"
1921 faandct_deps="faan fdctdsp"
1922 faanidct_deps="faan idctdsp"
1923 h264dsp_select="startcode"
1924 hevc_ps_select="golomb"
1925 intrax8_select="blockdsp idctdsp"
1926 mdct_select="fft"
1927 rdft_select="fft"
1928 me_cmp_select="fdctdsp idctdsp pixblockdsp"
1929 mpeg_er_select="error_resilience"
1930 mpegaudio_select="mpegaudiodsp mpegaudioheader"
1931 mpegaudiodsp_select="dct"
1932 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp mpeg_er videodsp"
1933 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
1934 vc1dsp_select="h264chroma qpeldsp startcode"
1935
1936 # decoders / encoders
1937 aac_decoder_select="imdct15 mdct sinewin"
1938 aac_encoder_select="audio_frame_queue iirfilter mdct sinewin"
1939 aac_latm_decoder_select="aac_decoder aac_latm_parser"
1940 ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert mdct"
1941 ac3_encoder_select="ac3dsp audiodsp mdct me_cmp"
1942 ac3_fixed_encoder_select="ac3dsp audiodsp mdct me_cmp"
1943 adpcm_g722_decoder_select="g722dsp"
1944 adpcm_g722_encoder_select="g722dsp"
1945 aic_decoder_select="golomb idctdsp"
1946 alac_encoder_select="lpc"
1947 als_decoder_select="bswapdsp"
1948 amrnb_decoder_select="lsp"
1949 amrwb_decoder_select="lsp"
1950 amv_decoder_select="sp5x_decoder"
1951 ape_decoder_select="bswapdsp"
1952 asv1_decoder_select="blockdsp bswapdsp idctdsp"
1953 asv1_encoder_select="bswapdsp fdctdsp pixblockdsp"
1954 asv2_decoder_select="blockdsp bswapdsp idctdsp"
1955 asv2_encoder_select="bswapdsp fdctdsp pixblockdsp"
1956 atrac1_decoder_select="mdct sinewin"
1957 atrac3_decoder_select="mdct"
1958 atrac3p_decoder_select="mdct sinewin"
1959 bink_decoder_select="blockdsp hpeldsp"
1960 binkaudio_dct_decoder_select="mdct rdft dct sinewin wma_freqs"
1961 binkaudio_rdft_decoder_select="mdct rdft sinewin wma_freqs"
1962 cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
1963 cllc_decoder_select="bswapdsp"
1964 comfortnoise_encoder_select="lpc"
1965 cook_decoder_select="audiodsp mdct sinewin"
1966 cscd_decoder_select="lzo"
1967 cscd_decoder_suggest="zlib"
1968 dca_decoder_select="fmtconvert mdct"
1969 dds_decoder_select="texturedsp"
1970 dnxhd_decoder_select="blockdsp idctdsp"
1971 dnxhd_encoder_select="aandcttables blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp"
1972 dvvideo_decoder_select="dvprofile idctdsp"
1973 dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
1974 dxa_decoder_deps="zlib"
1975 dxv_decoder_select="lzf texturedsp"
1976 eac3_decoder_select="ac3_decoder"
1977 eac3_encoder_select="ac3_encoder"
1978 eamad_decoder_select="aandcttables blockdsp bswapdsp idctdsp mpegvideo"
1979 eatgq_decoder_select="aandcttables idctdsp"
1980 eatqi_decoder_select="aandcttables blockdsp bswapdsp idctdsp"
1981 exr_decoder_deps="zlib"
1982 ffv1_decoder_select="rangecoder"
1983 ffv1_encoder_select="rangecoder"
1984 ffvhuff_decoder_select="huffyuv_decoder"
1985 ffvhuff_encoder_select="huffyuv_encoder"
1986 fic_decoder_select="golomb"
1987 flac_decoder_select="flacdsp"
1988 flac_encoder_select="bswapdsp flacdsp lpc"
1989 flashsv_decoder_deps="zlib"
1990 flashsv_encoder_deps="zlib"
1991 flashsv2_decoder_deps="zlib"
1992 flv_decoder_select="h263_decoder"
1993 flv_encoder_select="h263_encoder"
1994 fourxm_decoder_select="blockdsp bswapdsp"
1995 fraps_decoder_select="bswapdsp huffman"
1996 g2m_decoder_deps="zlib"
1997 g2m_decoder_select="blockdsp idctdsp jpegtables"
1998 h261_decoder_select="mpeg_er mpegvideo"
1999 h261_encoder_select="aandcttables mpegvideoenc"
2000 h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
2001 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
2002 h263i_decoder_select="h263_decoder"
2003 h263p_encoder_select="h263_encoder"
2004 h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel videodsp"
2005 h264_decoder_suggest="error_resilience"
2006 hap_decoder_select="snappy texturedsp"
2007 hap_encoder_deps="libsnappy"
2008 hap_encoder_select="texturedspenc"
2009 hevc_decoder_select="bswapdsp cabac hevc_ps videodsp"
2010 huffyuv_decoder_select="bswapdsp huffyuvdsp"
2011 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
2012 iac_decoder_select="imc_decoder"
2013 imc_decoder_select="bswapdsp fft mdct sinewin"
2014 indeo3_decoder_select="hpeldsp"
2015 indeo4_decoder_select="ividsp"
2016 indeo5_decoder_select="ividsp"
2017 interplay_video_decoder_select="hpeldsp"
2018 jpegls_decoder_select="mjpeg_decoder"
2019 jv_decoder_select="blockdsp"
2020 lagarith_decoder_select="huffyuvdsp"
2021 ljpeg_encoder_select="aandcttables idctdsp jpegtables"
2022 magicyuv_decoder_select="huffyuvdsp"
2023 mdec_decoder_select="blockdsp idctdsp mpegvideo"
2024 metasound_decoder_select="lsp mdct sinewin"
2025 mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
2026 mjpeg_decoder_select="blockdsp hpeldsp idctdsp jpegtables"
2027 mjpeg_encoder_select="aandcttables jpegtables mpegvideoenc"
2028 mjpegb_decoder_select="mjpeg_decoder"
2029 mlp_decoder_select="mlp_parser"
2030 motionpixels_decoder_select="bswapdsp"
2031 mp1_decoder_select="mpegaudio"
2032 mp1float_decoder_select="mpegaudio"
2033 mp2_decoder_select="mpegaudio"
2034 mp2float_decoder_select="mpegaudio"
2035 mp3_decoder_select="mpegaudio"
2036 mp3adu_decoder_select="mpegaudio"
2037 mp3adufloat_decoder_select="mpegaudio"
2038 mp3float_decoder_select="mpegaudio"
2039 mp3on4_decoder_select="mpegaudio"
2040 mp3on4float_decoder_select="mpegaudio"
2041 mpc7_decoder_select="bswapdsp mpegaudiodsp"
2042 mpc8_decoder_select="mpegaudiodsp"
2043 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
2044 mpeg_xvmc_decoder_select="mpeg2video_decoder"
2045 mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
2046 mpeg1video_encoder_select="aandcttables mpegvideoenc"
2047 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
2048 mpeg2video_encoder_select="aandcttables mpegvideoenc"
2049 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
2050 mpeg4_encoder_select="h263_encoder"
2051 msa1_decoder_select="mss34dsp"
2052 msmpeg4v1_decoder_select="h263_decoder"
2053 msmpeg4v2_decoder_select="h263_decoder"
2054 msmpeg4v2_encoder_select="h263_encoder"
2055 msmpeg4v3_decoder_select="h263_decoder"
2056 msmpeg4v3_encoder_select="h263_encoder"
2057 mss2_decoder_select="error_resilience mpeg_er mpegvideo qpeldsp vc1_decoder"
2058 mts2_decoder_select="mss34dsp"
2059 mxpeg_decoder_select="mjpeg_decoder"
2060 nellymoser_decoder_select="mdct sinewin"
2061 nellymoser_encoder_select="audio_frame_queue mdct sinewin"
2062 nuv_decoder_select="idctdsp lzo"
2063 on2avc_decoder_select="mdct"
2064 opus_decoder_deps="avresample"
2065 opus_decoder_select="imdct15"
2066 png_decoder_deps="zlib"
2067 png_encoder_deps="zlib"
2068 png_encoder_select="huffyuvencdsp"
2069 prores_decoder_select="idctdsp"
2070 prores_encoder_select="fdctdsp"
2071 qcelp_decoder_select="lsp"
2072 qdm2_decoder_select="mdct rdft mpegaudiodsp"
2073 ra_144_encoder_select="audio_frame_queue lpc"
2074 ralf_decoder_select="golomb"
2075 rscc_decoder_deps="zlib"
2076 rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2077 rv10_encoder_select="h263_encoder"
2078 rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
2079 rv20_encoder_select="h263_encoder"
2080 rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2081 rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
2082 screenpresso_decoder_deps="zlib"
2083 sipr_decoder_select="lsp"
2084 sp5x_decoder_select="mjpeg_decoder"
2085 svq1_decoder_select="hpeldsp"
2086 svq1_encoder_select="aandcttables hpeldsp me_cmp mpegvideoenc"
2087 svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
2088 svq3_decoder_suggest="zlib"
2089 tak_decoder_select="audiodsp"
2090 tdsc_decoder_deps="zlib"
2091 tdsc_decoder_select="mjpeg_decoder"
2092 theora_decoder_select="vp3_decoder"
2093 thp_decoder_select="mjpeg_decoder"
2094 tiff_decoder_suggest="zlib"
2095 tiff_encoder_suggest="zlib"
2096 truehd_decoder_select="mlp_decoder"
2097 truemotion2_decoder_select="bswapdsp"
2098 truespeech_decoder_select="bswapdsp"
2099 tscc_decoder_deps="zlib"
2100 txd_decoder_select="texturedsp"
2101 twinvq_decoder_select="mdct lsp sinewin"
2102 utvideo_decoder_select="bswapdsp"
2103 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
2104 vble_decoder_select="huffyuvdsp"
2105 vc1_decoder_select="blockdsp error_resilience h263_decoder h264qpel intrax8 mpeg_er mpegvideo vc1dsp"
2106 vc1image_decoder_select="vc1_decoder"
2107 vorbis_decoder_select="mdct"
2108 vorbis_encoder_select="mdct"
2109 vp3_decoder_select="hpeldsp vp3dsp videodsp"
2110 vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
2111 vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
2112 vp6a_decoder_select="vp6_decoder"
2113 vp6f_decoder_select="vp6_decoder"
2114 vp7_decoder_select="h264pred videodsp vp8dsp"
2115 vp8_decoder_select="h264pred videodsp vp8dsp"
2116 vp9_decoder_select="videodsp vp9_superframe_split_bsf"
2117 webp_decoder_select="vp8_decoder"
2118 wmapro_decoder_select="mdct sinewin wma_freqs"
2119 wmav1_decoder_select="mdct sinewin wma_freqs"
2120 wmav1_encoder_select="mdct sinewin wma_freqs"
2121 wmav2_decoder_select="mdct sinewin wma_freqs"
2122 wmav2_encoder_select="mdct sinewin wma_freqs"
2123 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
2124 wmv1_decoder_select="h263_decoder"
2125 wmv1_encoder_select="h263_encoder"
2126 wmv2_decoder_select="blockdsp error_resilience h263_decoder idctdsp intrax8 videodsp wmv2dsp"
2127 wmv2_encoder_select="h263_encoder wmv2dsp"
2128 wmv3_decoder_select="vc1_decoder"
2129 wmv3image_decoder_select="wmv3_decoder"
2130 zerocodec_decoder_deps="zlib"
2131 zlib_decoder_deps="zlib"
2132 zlib_encoder_deps="zlib"
2133 zmbv_decoder_deps="zlib"
2134 zmbv_encoder_deps="zlib"
2135
2136 # hardware accelerators
2137 d3d11va_deps="d3d11_h dxva_h ID3D11VideoDecoder"
2138 dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode"
2139 dxva2_lib_deps="dxva2"
2140 vda_deps="VideoDecodeAcceleration_VDADecoder_h blocks_extension pthreads"
2141 vda_extralibs="-framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore"
2142
2143 h263_vaapi_hwaccel_deps="vaapi"
2144 h263_vaapi_hwaccel_select="h263_decoder"
2145 h264_d3d11va_hwaccel_deps="d3d11va"
2146 h264_d3d11va_hwaccel_select="h264_decoder"
2147 h264_dxva2_hwaccel_deps="dxva2"
2148 h264_dxva2_hwaccel_select="h264_decoder"
2149 h264_mmal_hwaccel_deps="mmal"
2150 h264_qsv_hwaccel_deps="libmfx"
2151 h264_vaapi_hwaccel_deps="vaapi"
2152 h264_vaapi_hwaccel_select="h264_decoder"
2153 h264_vda_hwaccel_deps="vda"
2154 h264_vda_hwaccel_select="h264_decoder"
2155 h264_vda_old_hwaccel_deps="vda"
2156 h264_vda_old_hwaccel_select="h264_decoder"
2157 h264_vdpau_hwaccel_deps="vdpau"
2158 h264_vdpau_hwaccel_select="h264_decoder"
2159 hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
2160 hevc_d3d11va_hwaccel_select="hevc_decoder"
2161 hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
2162 hevc_dxva2_hwaccel_select="hevc_decoder"
2163 hevc_qsv_hwaccel_deps="libmfx"
2164 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
2165 hevc_vaapi_hwaccel_select="hevc_decoder"
2166 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
2167 hevc_vdpau_hwaccel_select="hevc_decoder"
2168 mpeg1_vdpau_hwaccel_deps="vdpau"
2169 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
2170 mpeg2_d3d11va_hwaccel_deps="d3d11va"
2171 mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
2172 mpeg2_dxva2_hwaccel_deps="dxva2"
2173 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
2174 mpeg2_mmal_hwaccel_deps="mmal"
2175 mpeg2_qsv_hwaccel_deps="libmfx"
2176 mpeg2_vaapi_hwaccel_deps="vaapi"
2177 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
2178 mpeg2_vdpau_hwaccel_deps="vdpau"
2179 mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
2180 mpeg4_vaapi_hwaccel_deps="vaapi"
2181 mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
2182 mpeg4_vdpau_hwaccel_deps="vdpau"
2183 mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
2184 vc1_d3d11va_hwaccel_deps="d3d11va"
2185 vc1_d3d11va_hwaccel_select="vc1_decoder"
2186 vc1_dxva2_hwaccel_deps="dxva2"
2187 vc1_dxva2_hwaccel_select="vc1_decoder"
2188 vc1_mmal_hwaccel_deps="mmal"
2189 vc1_qsv_hwaccel_deps="libmfx"
2190 vc1_vaapi_hwaccel_deps="vaapi"
2191 vc1_vaapi_hwaccel_select="vc1_decoder"
2192 vc1_vdpau_hwaccel_deps="vdpau"
2193 vc1_vdpau_hwaccel_select="vc1_decoder"
2194 vp8_qsv_hwaccel_deps="libmfx"
2195 vp8_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferVP8"
2196 vp8_vaapi_hwaccel_select="vp8_decoder"
2197 wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
2198 wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
2199 wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
2200 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
2201
2202 # hardware-accelerated codecs
2203 nvenc_deps_any="dlopen LoadLibrary"
2204 nvenc_extralibs='$ldl'
2205 omx_deps="dlopen pthreads"
2206 omx_extralibs='$ldl'
2207 omx_rpi_select="omx"
2208 qsvdec_select="qsv"
2209 qsvenc_select="qsv"
2210 vaapi_encode_deps="vaapi"
2211
2212 hwupload_cuda_filter_deps="cuda"
2213 scale_npp_filter_deps="cuda libnpp"
2214
2215 h264_mmal_decoder_deps="mmal"
2216 h264_nvenc_encoder_deps="nvenc"
2217 h264_omx_encoder_deps="omx"
2218 h264_qsv_decoder_deps="libmfx"
2219 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
2220 h264_qsv_encoder_deps="libmfx"
2221 h264_qsv_encoder_select="qsvenc"
2222 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
2223 h264_vaapi_encoder_select="vaapi_encode golomb"
2224 hevc_nvenc_encoder_deps="nvenc"
2225 hevc_qsv_decoder_deps="libmfx"
2226 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser hevc_qsv_hwaccel qsvdec"
2227 hevc_qsv_encoder_deps="libmfx"
2228 hevc_qsv_encoder_select="hevc_ps qsvenc"
2229 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
2230 hevc_vaapi_encoder_select="vaapi_encode golomb"
2231 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
2232 mjpeg_vaapi_encoder_select="vaapi_encode jpegtables"
2233 mpeg2_mmal_decoder_deps="mmal"
2234 mpeg2_qsv_decoder_deps="libmfx"
2235 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel mpegvideo_parser"
2236 mpeg2_qsv_encoder_deps="libmfx"
2237 mpeg2_qsv_encoder_select="qsvenc"
2238 mpeg4_omx_encoder_deps="omx"
2239 vc1_mmal_decoder_deps="mmal"
2240 vc1_qsv_decoder_deps="libmfx"
2241 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2242 vp8_qsv_decoder_deps="libmfx"
2243 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2244
2245 nvenc_h264_encoder_select="h264_nvenc_encoder"
2246 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2247
2248 # parsers
2249 h264_parser_select="golomb h264dsp h264parse"
2250 hevc_parser_select="hevc_ps"
2251 mpegaudio_parser_select="mpegaudioheader"
2252 mpegvideo_parser_select="mpegvideo"
2253 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2254 vc1_parser_select="vc1dsp"
2255
2256 # bitstream_filters
2257 mjpeg2jpeg_bsf_select="jpegtables"
2258
2259 # external libraries
2260 avisynth_deps="LoadLibrary"
2261 avxsynth_deps="dlopen"
2262 avisynth_demuxer_deps_any="avisynth avxsynth"
2263 avisynth_demuxer_select="riffdec"
2264 libdcadec_decoder_deps="libdcadec"
2265 libfaac_encoder_deps="libfaac"
2266 libfaac_encoder_select="audio_frame_queue"
2267 libfdk_aac_decoder_deps="libfdk_aac"
2268 libfdk_aac_encoder_deps="libfdk_aac"
2269 libfdk_aac_encoder_select="audio_frame_queue"
2270 libgsm_decoder_deps="libgsm"
2271 libgsm_encoder_deps="libgsm"
2272 libgsm_ms_decoder_deps="libgsm"
2273 libgsm_ms_encoder_deps="libgsm"
2274 libilbc_decoder_deps="libilbc"
2275 libilbc_encoder_deps="libilbc"
2276 libkvazaar_encoder_deps="libkvazaar"
2277 libmp3lame_encoder_deps="libmp3lame"
2278 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2279 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2280 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2281 libopencore_amrnb_encoder_select="audio_frame_queue"
2282 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2283 libopenh264_decoder_deps="libopenh264"
2284 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2285 libopenh264_encoder_deps="libopenh264"
2286 libopenjpeg_decoder_deps="libopenjpeg"
2287 libopenjpeg_encoder_deps="libopenjpeg"
2288 libopus_decoder_deps="libopus"
2289 libopus_encoder_deps="libopus"
2290 libopus_encoder_select="audio_frame_queue"
2291 libschroedinger_decoder_deps="libschroedinger"
2292 libschroedinger_encoder_deps="libschroedinger"
2293 libspeex_decoder_deps="libspeex"
2294 libspeex_encoder_deps="libspeex"
2295 libspeex_encoder_select="audio_frame_queue"
2296 libtheora_encoder_deps="libtheora"
2297 libtwolame_encoder_deps="libtwolame"
2298 libvo_aacenc_encoder_deps="libvo_aacenc"
2299 libvo_aacenc_encoder_select="audio_frame_queue"
2300 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2301 libvorbis_encoder_deps="libvorbis"
2302 libvorbis_encoder_select="audio_frame_queue"
2303 libvpx_vp8_decoder_deps="libvpx"
2304 libvpx_vp8_encoder_deps="libvpx"
2305 libvpx_vp9_decoder_deps="libvpx"
2306 libvpx_vp9_encoder_deps="libvpx"
2307 libwavpack_encoder_deps="libwavpack"
2308 libwavpack_encoder_select="audio_frame_queue"
2309 libwebp_encoder_deps="libwebp"
2310 libx262_encoder_deps="libx262"
2311 libx264_encoder_deps="libx264"
2312 libx265_encoder_deps="libx265"
2313 libxavs_encoder_deps="libxavs"
2314 libxvid_encoder_deps="libxvid mkstemp"
2315
2316 # demuxers / muxers
2317 ac3_demuxer_select="ac3_parser"
2318 asf_demuxer_select="riffdec"
2319 asf_muxer_select="riffenc"
2320 asf_stream_muxer_select="asf_muxer"
2321 avi_demuxer_select="iso_media riffdec"
2322 avi_muxer_select="riffenc"
2323 caf_demuxer_select="iso_media riffdec"
2324 dash_muxer_select="mp4_muxer"
2325 dirac_demuxer_select="dirac_parser"
2326 dv_demuxer_select="dvprofile"
2327 dv_muxer_select="dvprofile"
2328 dxa_demuxer_select="riffdec"
2329 eac3_demuxer_select="ac3_parser"
2330 f4v_muxer_select="mov_muxer"
2331 flac_demuxer_select="flac_parser"
2332 hds_muxer_select="flv_muxer"
2333 hls_muxer_select="mpegts_muxer"
2334 ipod_muxer_select="mov_muxer"
2335 ismv_muxer_select="mov_muxer"
2336 matroska_audio_muxer_select="matroska_muxer"
2337 matroska_demuxer_select="iso_media riffdec"
2338 matroska_demuxer_suggest="bzlib lzo zlib"
2339 matroska_muxer_select="iso_media riffenc"
2340 mmf_muxer_select="riffenc"
2341 mov_demuxer_select="iso_media riffdec"
2342 mov_demuxer_suggest="zlib"
2343 mov_muxer_select="iso_media riffenc rtpenc_chain"
2344 mp3_demuxer_select="mpegaudio_parser"
2345 mp3_muxer_select="mpegaudioheader"
2346 mp4_muxer_select="mov_muxer"
2347 mpegts_demuxer_select="iso_media"
2348 mpegts_muxer_select="adts_muxer latm_muxer"
2349 mpegtsraw_demuxer_select="mpegts_demuxer"
2350 mxf_d10_muxer_select="mxf_muxer"
2351 nut_muxer_select="riffenc"
2352 nuv_demuxer_select="riffdec"
2353 oga_muxer_select="ogg_muxer"
2354 ogg_demuxer_select="dirac_parse"
2355 opus_muxer_select="ogg_muxer"
2356 psp_muxer_select="mov_muxer"
2357 rtp_demuxer_select="sdp_demuxer"
2358 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2359 rtsp_demuxer_select="http_protocol rtpdec"
2360 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2361 sap_demuxer_select="sdp_demuxer"
2362 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2363 sdp_demuxer_select="rtpdec"
2364 smoothstreaming_muxer_select="ismv_muxer"
2365 spdif_muxer_select="aac_parser"
2366 spx_muxer_select="ogg_muxer"
2367 swf_demuxer_suggest="zlib"
2368 tak_demuxer_select="tak_parser"
2369 tg2_muxer_select="mov_muxer"
2370 tgp_muxer_select="mov_muxer"
2371 w64_demuxer_select="wav_demuxer"
2372 wav_demuxer_select="riffdec"
2373 wav_muxer_select="riffenc"
2374 webm_muxer_select="iso_media riffenc"
2375 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2376 wtv_demuxer_select="mpegts_demuxer riffdec"
2377 xmv_demuxer_select="riffdec"
2378 xwma_demuxer_select="riffdec"
2379
2380 # indevs / outdevs
2381 alsa_indev_deps="alsa"
2382 alsa_outdev_deps="alsa"
2383 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2384 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2385 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2386 dv1394_indev_deps="dv1394"
2387 dv1394_indev_select="dv_demuxer"
2388 fbdev_indev_deps="linux_fb_h"
2389 jack_indev_deps="jack"
2390 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2391 libcdio_indev_deps="libcdio"
2392 libdc1394_indev_deps="libdc1394"
2393 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2394 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2395 pulse_indev_deps="libpulse"
2396 sndio_indev_deps="sndio"
2397 sndio_outdev_deps="sndio"
2398 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2399 vfwcap_indev_deps="vfw32 vfwcap_defines"
2400 xcbgrab_indev_deps="libxcb"
2401
2402 # protocols
2403 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2404 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2405 ffrtmpcrypt_protocol_select="tcp_protocol"
2406 ffrtmphttp_protocol_deps="!librtmp_protocol"
2407 ffrtmphttp_protocol_select="http_protocol"
2408 gopher_protocol_select="network"
2409 http_protocol_select="tcp_protocol"
2410 httpproxy_protocol_select="tcp_protocol"
2411 https_protocol_select="tls_protocol"
2412 icecast_protocol_select="http_protocol"
2413 librtmp_protocol_deps="librtmp"
2414 librtmpe_protocol_deps="librtmp"
2415 librtmps_protocol_deps="librtmp"
2416 librtmpt_protocol_deps="librtmp"
2417 librtmpte_protocol_deps="librtmp"
2418 mmsh_protocol_select="http_protocol"
2419 mmst_protocol_select="network"
2420 rtmp_protocol_deps="!librtmp_protocol"
2421 rtmp_protocol_select="tcp_protocol"
2422 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2423 rtmps_protocol_deps="!librtmp_protocol"
2424 rtmps_protocol_select="tls_protocol"
2425 rtmpt_protocol_select="ffrtmphttp_protocol"
2426 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2427 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2428 rtp_protocol_select="udp_protocol"
2429 sctp_protocol_deps="struct_sctp_event_subscribe"
2430 sctp_protocol_select="network"
2431 srtp_protocol_select="rtp_protocol srtp"
2432 tcp_protocol_select="network"
2433 tls_gnutls_protocol_deps="gnutls"
2434 tls_gnutls_protocol_select="tcp_protocol"
2435 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2436 tls_openssl_protocol_select="tcp_protocol"
2437 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2438 udp_protocol_select="network"
2439 unix_protocol_deps="sys_un_h"
2440 unix_protocol_select="network"
2441
2442 # filters
2443 asyncts_filter_deps="avresample"
2444 blackframe_filter_deps="gpl"
2445 boxblur_filter_deps="gpl"
2446 bs2b_filter_deps="libbs2b"
2447 cropdetect_filter_deps="gpl"
2448 deinterlace_qsv_filter_deps="libmfx"
2449 deinterlace_vaapi_filter_deps="vaapi"
2450 delogo_filter_deps="gpl"
2451 drawtext_filter_deps="libfreetype"
2452 frei0r_filter_deps="frei0r dlopen"
2453 frei0r_filter_extralibs='$ldl'
2454 frei0r_src_filter_deps="frei0r dlopen"
2455 frei0r_src_filter_extralibs='$ldl'
2456 hdcd_filter_deps="libhdcd"
2457 hqdn3d_filter_deps="gpl"
2458 interlace_filter_deps="gpl"
2459 movie_filter_deps="avcodec avformat"
2460 ocv_filter_deps="libopencv"
2461 resample_filter_deps="avresample"
2462 scale_filter_deps="swscale"
2463 scale_qsv_filter_deps="libmfx"
2464 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2465
2466 # examples
2467 decode_audio_example_deps="avcodec avutil"
2468 decode_video_example_deps="avcodec avutil"
2469 encode_audio_example_deps="avcodec avutil"
2470 encode_video_example_deps="avcodec avutil"
2471 filter_audio_example_deps="avfilter avutil"
2472 metadata_example_deps="avformat avutil"
2473 output_example_deps="avcodec avformat avresample avutil swscale"
2474 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2475 transcode_aac_example_deps="avcodec avformat avresample"
2476
2477 # libraries, in linking order
2478 avcodec_deps="avutil"
2479 avcodec_select="null_bsf"
2480 avdevice_deps="avformat avcodec avutil"
2481 avfilter_deps="avutil"
2482 avformat_deps="avcodec avutil"
2483 avresample_deps="avutil"
2484 swscale_deps="avutil"
2485
2486 # programs
2487 avconv_deps="avcodec avfilter avformat avresample swscale"
2488 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2489                fps_filter null_filter resample_filter scale_filter
2490                trim_filter"
2491 avplay_deps="avcodec avfilter avformat avresample sdl"
2492 avplay_extralibs='$sdl_extralibs'
2493 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2494 avprobe_deps="avcodec avformat"
2495
2496 # documentation
2497 pod2man_deps="doc"
2498 texi2html_deps="doc"
2499
2500 # default parameters
2501
2502 logfile="avbuild/config.log"
2503
2504 # installation paths
2505 prefix_default="/usr/local"
2506 bindir_default='${prefix}/bin'
2507 datadir_default='${prefix}/share/avconv'
2508 docdir_default='${prefix}/share/doc/libav'
2509 incdir_default='${prefix}/include'
2510 libdir_default='${prefix}/lib'
2511 mandir_default='${prefix}/share/man'
2512 shlibdir_default="$libdir_default"
2513
2514 # toolchain
2515 ar_default="ar"
2516 cc_default="gcc"
2517 host_cc_default="gcc"
2518 ln_s="ln -s -f"
2519 nm_default="nm -g"
2520 objformat="elf"
2521 pkg_config_default=pkg-config
2522 ranlib="ranlib"
2523 strip="strip"
2524 version_script='--version-script'
2525 yasmexe="yasm"
2526
2527 # machine
2528 arch_default=$(uname -m)
2529 cpu="generic"
2530 intrinsics="none"
2531
2532 # OS
2533 target_os_default=$(tolower $(uname -s))
2534 host_os=$target_os_default
2535
2536 # configurable options
2537 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2538
2539 enable asm
2540 enable debug
2541 enable doc
2542 enable faan faandct faanidct
2543 enable optimizations
2544 enable safe_bitstream_reader
2545 enable static
2546 enable swscale_alpha
2547 enable valgrind_backtrace
2548
2549 # By default, enable only those hwaccels that have no external dependencies.
2550 enable d3d11va dxva2 vda vdpau
2551
2552 # build settings
2553 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2554 LIBPREF="lib"
2555 LIBSUF=".a"
2556 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2557 SLIBPREF="lib"
2558 SLIBSUF=".so"
2559 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2560 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2561 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2562 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2563 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2564 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2565 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2566
2567 asflags_filter=echo
2568 cflags_filter=echo
2569 ldflags_filter=echo
2570
2571 AS_C='-c'
2572 AS_O='-o $@'
2573 CC_C='-c'
2574 CC_E='-E -o $@'
2575 CC_O='-o $@'
2576 OBJCC_C='-c'
2577 OBJCC_E='-E -o $@'
2578 OBJCC_O='-o $@'
2579 LD_O='-o $@'
2580 LD_LIB='-l%'
2581 LD_PATH='-L'
2582 HOSTCC_C='-c'
2583 HOSTCC_E='-E -o $@'
2584 HOSTCC_O='-o $@'
2585 HOSTLD_O='-o $@'
2586
2587 host_extralibs='-lm'
2588 host_cflags_filter=echo
2589 host_ldflags_filter=echo
2590
2591 target_path='$(CURDIR)'
2592
2593 # since the object filename is not given with the -MM flag, the compiler
2594 # is only able to print the basename, and we must add the path ourselves
2595 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2596 DEPFLAGS='-MM'
2597
2598 # find source path
2599 if test -f configure; then
2600     source_path=.
2601 else
2602     source_path=$(cd $(dirname "$0"); pwd)
2603     echo "$source_path" | grep -q '[[:blank:]]' &&
2604         die "Out of tree builds are impossible with whitespace in source path."
2605     test -e "$source_path/config.h" &&
2606         die "Out of tree builds are impossible with config.h in source dir."
2607 fi
2608
2609 for v in "$@"; do
2610     r=${v#*=}
2611     l=${v%"$r"}
2612     r=$(sh_quote "$r")
2613     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2614 done
2615
2616 find_things(){
2617     thing=$1
2618     pattern=$2
2619     file=$source_path/$3
2620     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2621 }
2622
2623 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2624 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2625 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2626 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2627 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2628 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2629 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2630 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2631 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2632
2633 find_things_extern(){
2634     thing=$1
2635     pattern=$2
2636     file=$source_path/$3
2637     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2638 }
2639
2640 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2641 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2642
2643 ALL_COMPONENTS="
2644     $BSF_LIST
2645     $DECODER_LIST
2646     $DEMUXER_LIST
2647     $ENCODER_LIST
2648     $FILTER_LIST
2649     $HWACCEL_LIST
2650     $INDEV_LIST
2651     $MUXER_LIST
2652     $OUTDEV_LIST
2653     $PARSER_LIST
2654     $PROTOCOL_LIST
2655 "
2656
2657 for n in $COMPONENT_LIST; do
2658     v=$(toupper ${n%s})_LIST
2659     eval enable \$$v
2660     eval ${n}_if_any="\$$v"
2661 done
2662
2663 enable $ARCH_EXT_LIST
2664
2665 die_unknown(){
2666     echo "Unknown option \"$1\"."
2667     echo "See $0 --help for available options."
2668     exit 1
2669 }
2670
2671 print_3_columns() {
2672     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2673 }
2674
2675 show_list() {
2676     suffix=_$1
2677     shift
2678     echo $* | sed s/$suffix//g | print_3_columns
2679     exit 0
2680 }
2681
2682 rand_list(){
2683     IFS=', '
2684     set -- $*
2685     unset IFS
2686     for thing; do
2687         comp=${thing%:*}
2688         prob=${thing#$comp}
2689         prob=${prob#:}
2690         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2691         echo "prob ${prob:-0.5}"
2692         printf '%s\n' $comp
2693     done
2694 }
2695
2696 do_random(){
2697     action=$1
2698     shift
2699     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2700     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2701 }
2702
2703 for opt do
2704     optval="${opt#*=}"
2705     case "$opt" in
2706         --extra-ldflags=*)
2707             add_ldflags $optval
2708         ;;
2709         --extra-ldexeflags=*)
2710             add_ldexeflags $optval
2711         ;;
2712         --extra-libs=*)
2713             add_extralibs $optval
2714         ;;
2715         --disable-devices)
2716             disable $INDEV_LIST $OUTDEV_LIST
2717         ;;
2718         --enable-debug=*)
2719             debuglevel="$optval"
2720         ;;
2721         --disable-programs)
2722             disable $PROGRAM_LIST
2723         ;;
2724         --disable-everything)
2725             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2726         ;;
2727         --disable-all)
2728             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2729             disable $LIBRARY_LIST $PROGRAM_LIST doc
2730         ;;
2731         --enable-random|--disable-random)
2732             action=${opt%%-random}
2733             do_random ${action#--} $COMPONENT_LIST
2734         ;;
2735         --enable-random=*|--disable-random=*)
2736             action=${opt%%-random=*}
2737             do_random ${action#--} $optval
2738         ;;
2739         --enable-*=*|--disable-*=*)
2740             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2741             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2742             eval list=\$$(toupper $thing)_LIST
2743             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2744             $action $(filter "$name" $list)
2745         ;;
2746         --enable-avserver|--disable-avserver*)
2747             warn "avserver has been removed, the ${opt} option is only"\
2748                  "provided for compatibility and will be removed in the future"
2749         ;;
2750         --enable-?*|--disable-?*)
2751             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2752             if is_in $option $COMPONENT_LIST; then
2753                 test $action = disable && action=unset
2754                 eval $action \$$(toupper ${option%s})_LIST
2755             elif is_in $option $CMDLINE_SELECT; then
2756                 $action $option
2757             else
2758                 die_unknown $opt
2759             fi
2760         ;;
2761         --list-*)
2762             NAME="${opt#--list-}"
2763             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2764             NAME=${NAME%s}
2765             eval show_list $NAME \$$(toupper $NAME)_LIST
2766         ;;
2767         --help|-h) show_help
2768         ;;
2769         --quiet|-q) quiet=yes
2770         ;;
2771         *)
2772             optname="${opt%%=*}"
2773             optname="${optname#--}"
2774             optname=$(echo "$optname" | sed 's/-/_/g')
2775             if is_in $optname $CMDLINE_SET; then
2776                 eval $optname='$optval'
2777             elif is_in $optname $CMDLINE_APPEND; then
2778                 append $optname "$optval"
2779             else
2780                 die_unknown $opt
2781             fi
2782         ;;
2783     esac
2784 done
2785
2786 for e in $env; do
2787     eval "export $e"
2788 done
2789
2790 disabled logging && logfile=/dev/null
2791
2792 # Die early if licensing-related configure options are incompatible.
2793 die_license_disabled() {
2794     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2795 }
2796
2797 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2798 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2799 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2800
2801 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2802
2803 # Disable all the library-specific components if the library itself
2804 # is disabled, see AVCODEC_LIST and following _LIST variables.
2805
2806 disable_components(){
2807     disabled ${1} && disable $(
2808         eval components="\$$(toupper ${1})_COMPONENTS"
2809         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2810     )
2811 }
2812
2813 map 'disable_components $v' $LIBRARY_LIST
2814
2815 mkdir -p avbuild
2816 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2817 set >> $logfile
2818
2819 case "$toolchain" in
2820     *-asan)
2821         cc_default="${toolchain%-asan}"
2822         add_cflags  -fsanitize=address
2823         add_ldflags -fsanitize=address
2824     ;;
2825     *-msan)
2826         cc_default="${toolchain%-msan}"
2827         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2828         add_ldflags -fsanitize=memory
2829     ;;
2830     *-tsan)
2831         cc_default="${toolchain%-tsan}"
2832         add_cflags  -fsanitize=thread -fPIE
2833         add_ldflags -fsanitize=thread -pie
2834         case "$toolchain" in
2835             gcc-tsan)
2836                 add_cflags  -fPIC
2837                 add_ldflags -fPIC
2838                 ;;
2839         esac
2840     ;;
2841     *-usan)
2842         cc_default="${toolchain%-usan}"
2843         add_cflags  -fsanitize=undefined
2844         add_ldflags -fsanitize=undefined
2845         case "$toolchain" in
2846             clang-usan)
2847                 add_cflags -O1
2848                 ;;
2849         esac
2850     ;;
2851     valgrind-*)
2852         target_exec_default="valgrind"
2853         case "$toolchain" in
2854             valgrind-massif)
2855                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2856                 ;;
2857             valgrind-memcheck)
2858                 target_exec_args="--track-origins=yes --leak-check=full"
2859                 ;;
2860         esac
2861     ;;
2862     msvc)
2863         # Check whether the current MSVC version needs the C99 converter.
2864         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2865         # support enough of C99 to build libav. Default to the new
2866         # behaviour if the regexp was unable to match anything, since this
2867         # successfully parses the version number of existing supported
2868         # versions that require the converter (MSVC 2010 and 2012).
2869         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2870         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2871             cc_default="cl"
2872         else
2873             cc_default="c99wrap cl"
2874         fi
2875         ld_default="$source_path/compat/windows/mslink"
2876         nm_default="dumpbin -symbols"
2877         ar_default="lib"
2878         case "$arch" in
2879         arm*)
2880             as_default="armasm"
2881             ;;
2882         esac
2883         target_os_default="win32"
2884         # Use a relative path for TMPDIR. This makes sure all the
2885         # ffconf temp files are written with a relative path, avoiding
2886         # issues with msys/win32 path conversion for MSVC parameters
2887         # such as -Fo<file> or -out:<file>.
2888         TMPDIR=.
2889     ;;
2890     icl)
2891         cc_default="icl"
2892         ld_default="xilink"
2893         nm_default="dumpbin -symbols"
2894         ar_default="xilib"
2895         target_os_default="win32"
2896         TMPDIR=.
2897     ;;
2898     gcov)
2899         add_cflags  -fprofile-arcs -ftest-coverage
2900         add_ldflags -fprofile-arcs -ftest-coverage
2901     ;;
2902     llvm-cov)
2903         add_cflags -fprofile-arcs -ftest-coverage
2904         add_ldflags --coverage
2905     ;;
2906     hardened)
2907         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2908         add_cflags   -fno-strict-overflow -fstack-protector-all
2909         add_ldflags  -Wl,-z,relro -Wl,-z,now
2910     ;;
2911     ?*)
2912         die "Unknown toolchain $toolchain"
2913     ;;
2914 esac
2915
2916 test -n "$cross_prefix" && enable cross_compile
2917
2918 if enabled cross_compile; then
2919     test -n "$arch" && test -n "$target_os" ||
2920         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2921 fi
2922
2923 ar_default="${cross_prefix}${ar_default}"
2924 cc_default="${cross_prefix}${cc_default}"
2925 occ_default="${cross_prefix}${occ_default}"
2926 nm_default="${cross_prefix}${nm_default}"
2927 pkg_config_default="${cross_prefix}${pkg_config_default}"
2928 ranlib="${cross_prefix}${ranlib}"
2929 strip="${cross_prefix}${strip}"
2930
2931 sysinclude_default="${sysroot}/usr/include"
2932
2933 set_default arch cc pkg_config sysinclude target_exec target_os
2934 enabled cross_compile || host_cc_default=$cc
2935 set_default host_cc
2936
2937 if ! $pkg_config --version >/dev/null 2>&1; then
2938     warn "$pkg_config not found, library detection may fail."
2939     pkg_config=false
2940 fi
2941
2942 exesuf() {
2943     case $1 in
2944         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2945     esac
2946 }
2947
2948 EXESUF=$(exesuf $target_os)
2949 HOSTEXESUF=$(exesuf $host_os)
2950
2951 # set temporary file name
2952 : ${TMPDIR:=$TEMPDIR}
2953 : ${TMPDIR:=$TMP}
2954 : ${TMPDIR:=/tmp}
2955
2956 if ! check_cmd mktemp -u XXXXXX; then
2957     # simple replacement for missing mktemp
2958     # NOT SAFE FOR GENERAL USE
2959     mktemp(){
2960         echo "${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2961     }
2962 fi
2963
2964 tmpfile(){
2965     tmp=$(mktemp -u "${TMPDIR}/ffconf.XXXXXXXX")$2 &&
2966         (set -C; exec > $tmp) 2>/dev/null ||
2967         die "Unable to create temporary file in $TMPDIR."
2968     append TMPFILES $tmp
2969     eval $1=$tmp
2970 }
2971
2972 trap 'rm -f -- $TMPFILES' EXIT
2973
2974 tmpfile TMPASM .asm
2975 tmpfile TMPC   .c
2976 tmpfile TMPE   $EXESUF
2977 tmpfile TMPH   .h
2978 tmpfile TMPO   .o
2979 tmpfile TMPS   .S
2980 tmpfile TMPSH  .sh
2981 tmpfile TMPV   .ver
2982
2983 unset -f mktemp
2984
2985 chmod +x $TMPE
2986
2987 # make sure we can execute files in $TMPDIR
2988 cat > $TMPSH 2>> $logfile <<EOF
2989 #! /bin/sh
2990 EOF
2991 chmod +x $TMPSH >> $logfile 2>&1
2992 if ! $TMPSH >> $logfile 2>&1; then
2993     cat <<EOF
2994 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
2995 variable to another directory and make sure that it is not mounted noexec.
2996 EOF
2997     die "Sanity test failed."
2998 fi
2999
3000 armasm_flags(){
3001     for flag; do
3002         case $flag in
3003             # Filter out MSVC cl.exe options from cflags that shouldn't
3004             # be passed to gas-preprocessor
3005             -M[TD]*)                                            ;;
3006             *)                  echo $flag                      ;;
3007         esac
3008    done
3009 }
3010
3011 ccc_flags(){
3012     for flag; do
3013         case $flag in
3014             -std=c99)           echo -c99                       ;;
3015             -mcpu=*)            echo -arch ${flag#*=}           ;;
3016             -mieee)             echo -ieee                      ;;
3017             -O*|-fast)          echo $flag                      ;;
3018             -fno-math-errno)    echo -assume nomath_errno       ;;
3019             -g)                 echo -g3                        ;;
3020             -Wall)              echo -msg_enable level2         ;;
3021             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3022             -Wl,*)              echo $flag                      ;;
3023             -f*|-W*)                                            ;;
3024             *)                  echo $flag                      ;;
3025         esac
3026    done
3027 }
3028
3029 cparser_flags(){
3030     for flag; do
3031         case $flag in
3032             -Wno-switch)             echo -Wno-switch-enum ;;
3033             -Wno-format-zero-length) ;;
3034             -Wdisabled-optimization) ;;
3035             -Wno-pointer-sign)       echo -Wno-other ;;
3036             *)                       echo $flag ;;
3037         esac
3038     done
3039 }
3040
3041 msvc_common_flags(){
3042     for flag; do
3043         case $flag in
3044             # In addition to specifying certain flags under the compiler
3045             # specific filters, they must be specified here as well or else the
3046             # generic catch all at the bottom will print the original flag.
3047             -Wall)                ;;
3048             -Wextra)              ;;
3049             -std=c99)             ;;
3050             # Common flags
3051             -fomit-frame-pointer) ;;
3052             -g)                   echo -Z7 ;;
3053             -fno-math-errno)      ;;
3054             -fno-common)          ;;
3055             -fno-signed-zeros)    ;;
3056             -fPIC)                ;;
3057             -mthumb)              ;;
3058             -march=*)             ;;
3059             -lz)                  echo zlib.lib ;;
3060             -lx264)               echo libx264.lib ;;
3061             -l*)                  echo ${flag#-l}.lib ;;
3062             -L*)                  echo -libpath:${flag#-L} ;;
3063             *)                    echo $flag ;;
3064         esac
3065     done
3066 }
3067
3068 msvc_flags(){
3069     msvc_common_flags "$@"
3070     for flag; do
3071         case $flag in
3072             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3073                                        -wd4554 ;;
3074             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3075                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3076                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3077                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3078         esac
3079     done
3080 }
3081
3082 icl_flags(){
3083     msvc_common_flags "$@"
3084     for flag; do
3085         case $flag in
3086             # Despite what Intel's documentation says -Wall, which is supported
3087             # on Windows, does enable remarks so disable them here.
3088             -Wall)                echo $flag -Qdiag-disable:remark ;;
3089             -std=c99)             echo -Qstd=c99 ;;
3090         esac
3091     done
3092 }
3093
3094 pgi_flags(){
3095     for flag; do
3096         case $flag in
3097             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3098             -fomit-frame-pointer) echo -Mnoframe ;;
3099             -g)                   echo -gopt ;;
3100             *)                    echo $flag ;;
3101         esac
3102     done
3103 }
3104
3105 suncc_flags(){
3106     for flag; do
3107         case $flag in
3108             -march=*|-mcpu=*)
3109                 case "${flag#*=}" in
3110                     native)                   echo -xtarget=native       ;;
3111                     v9|niagara)               echo -xarch=sparc          ;;
3112                     ultrasparc)               echo -xarch=sparcvis       ;;
3113                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3114                     i586|pentium)             echo -xchip=pentium        ;;
3115                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3116                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3117                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3118                     pentium4*)          echo -xtarget=pentium4           ;;
3119                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3120                     *-sse3)             echo -xarch=sse3                 ;;
3121                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3122                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3123                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3124                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3125                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3126                     k8|opteron|athlon64|athlon-fx)
3127                                                echo -xarch=sse2a         ;;
3128                     athlon*)                   echo -xarch=pentium_proa  ;;
3129                 esac
3130                 ;;
3131             -std=c99)             echo -xc99              ;;
3132             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3133             -fPIC)                echo -KPIC -xcode=pic32 ;;
3134             -W*,*)                echo $flag              ;;
3135             -f*-*|-W*|-mimpure-text)                      ;;
3136             -shared)              echo -G                 ;;
3137             *)                    echo $flag              ;;
3138         esac
3139     done
3140 }
3141
3142 tms470_flags(){
3143     for flag; do
3144         case $flag in
3145             -march=*|-mcpu=*)
3146                 case "${flag#*=}" in
3147                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3148                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3149                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3150                     armv6*|arm11*)          echo -mv=6   ;;
3151                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3152                                             echo -mv=5e  ;;
3153                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3154                 esac
3155                 ;;
3156             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3157             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3158             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3159             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3160             -msoft-float)   echo --float_support=vfplib       ;;
3161             -O[0-3]|-mf=*)  echo $flag                        ;;
3162             -g)             echo -g -mn                       ;;
3163             -pds=*)         echo $flag                        ;;
3164             -D*|-I*)        echo $flag                        ;;
3165             --gcc|--abi=*)  echo $flag                        ;;
3166             -me)            echo $flag                        ;;
3167         esac
3168     done
3169 }
3170
3171 probe_cc(){
3172     pfx=$1
3173     _cc=$2
3174
3175     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3176     unset _ld_o _ldflags _ld_lib _ld_path
3177     unset _depflags _DEPCMD _DEPFLAGS
3178     _flags_filter=echo
3179
3180     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3181         _type=llvm_gcc
3182         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3183         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3184         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3185         _cflags_speed='-O3'
3186         _cflags_size='-Os'
3187     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3188         _type=gcc
3189         gcc_version=$($_cc --version | head -n1)
3190         gcc_basever=$($_cc -dumpversion)
3191         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3192         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3193         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3194         if ! $_cc -dumpversion | grep -q '^2\.'; then
3195             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3196         fi
3197         _cflags_speed='-O3'
3198         _cflags_size='-Os'
3199     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3200         _type=icc
3201         _ident=$($_cc --version | head -n1)
3202         _depflags='-MMD'
3203         _cflags_speed='-O3'
3204         _cflags_size='-Os'
3205         _cflags_noopt='-O1'
3206     elif $_cc -v 2>&1 | grep -q xlc; then
3207         _type=xlc
3208         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3209         _cflags_speed='-O5'
3210         _cflags_size='-O5 -qcompact'
3211     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3212         _type=ccc
3213         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3214         _DEPFLAGS='-M'
3215         _cflags_speed='-fast'
3216         _cflags_size='-O1'
3217         _flags_filter=ccc_flags
3218     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3219         test -d "$sysroot" || die "No valid sysroot specified."
3220         _type=armcc
3221         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3222         armcc_conf="$PWD/armcc.conf"
3223         $_cc --arm_linux_configure                 \
3224              --arm_linux_config_file="$armcc_conf" \
3225              --configure_sysroot="$sysroot"        \
3226              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3227              die "Error creating armcc configuration file."
3228         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3229         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3230         as_default="${cross_prefix}gcc"
3231         _depflags='-MMD'
3232         _cflags_speed='-O3'
3233         _cflags_size='-Os'
3234     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3235         _type=tms470
3236         _ident=$($_cc -version | head -n1 | tr -s ' ')
3237         _flags='--gcc --abi=eabi -me'
3238         _cc_e='-ppl -fe=$@'
3239         _cc_o='-fe=$@'
3240         _depflags='-ppa -ppd=$(@:.o=.d)'
3241         _cflags_speed='-O3 -mf=5'
3242         _cflags_size='-O3 -mf=2'
3243         _flags_filter=tms470_flags
3244     elif $_cc -v 2>&1 | grep -q clang; then
3245         _type=clang
3246         _ident=$($_cc --version 2>/dev/null | head -n1)
3247         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3248         _cflags_speed='-O3'
3249         _cflags_size='-Os'
3250     elif $_cc -V 2>&1 | grep -q Sun; then
3251         _type=suncc
3252         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3253         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3254         _DEPFLAGS='-xM1 -xc99'
3255         _ldflags='-std=c99'
3256         _cflags_speed='-O5'
3257         _cflags_size='-O5 -xspace'
3258         _flags_filter=suncc_flags
3259     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3260         _type=pathscale
3261         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3262         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3263         _cflags_speed='-O2'
3264         _cflags_size='-Os'
3265         _flags_filter='filter_out -Wdisabled-optimization'
3266     elif $_cc -v 2>&1 | grep -q Open64; then
3267         _type=open64
3268         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3269         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3270         _cflags_speed='-O2'
3271         _cflags_size='-Os'
3272         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3273     elif $_cc -V 2>&1 | grep -q Portland; then
3274         _type=pgi
3275         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3276         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3277         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3278         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3279         _cflags_noopt="-O1"
3280         _flags_filter=pgi_flags
3281     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3282         _type=armasm
3283         _ident=$($_cc | head -n1)
3284         # 4509: "This form of conditional instruction is deprecated"
3285         _flags="-nologo -ignore 4509"
3286         _flags_filter=armasm_flags
3287     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3288         _type=msvc
3289         _ident=$($_cc 2>&1 | head -n1)
3290         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3291         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3292         _cflags_speed="-O2"
3293         _cflags_size="-O1"
3294         _cflags_noopt="-O1"
3295         if $_cc -nologo- 2>&1 | grep -q Linker; then
3296             _ld_o='-out:$@'
3297         else
3298             _ld_o='-Fe$@'
3299         fi
3300         _cc_o='-Fo$@'
3301         _cc_e='-P -Fi$@'
3302         _flags_filter=msvc_flags
3303         _ld_lib='lib%.a'
3304         _ld_path='-libpath:'
3305         _flags='-nologo'
3306     elif $_cc 2>&1 | grep -q Intel; then
3307         _type=icl
3308         _ident=$($_cc 2>&1 | head -n1)
3309         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3310         # Not only is O3 broken on 13.x+ but it is slower on all previous
3311         # versions (tested) as well.
3312         _cflags_speed="-O2"
3313         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3314         if $_cc 2>&1 | grep -q Linker; then
3315             _ld_o='-out:$@'
3316         else
3317             _ld_o='-Fe$@'
3318         fi
3319         _cc_o='-Fo$@'
3320         _cc_e='-P'
3321         _flags_filter=icl_flags
3322         _ld_lib='lib%.a'
3323         _ld_path='-libpath:'
3324         # -Qdiag-error to make icl error when seeing certain unknown arguments
3325         _flags='-nologo -Qdiag-error:4044,10157'
3326         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3327         # with MSVC which enables it by default.
3328         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3329     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3330         # lld can emulate multiple different linkers; in ms link.exe mode,
3331         # the -? parameter gives the help output which contains an identifyable
3332         # string, while it gives an error in other modes.
3333         _type=lld-link
3334         # The link.exe mode doesn't have a switch for getting the version,
3335         # but we can force it back to gnu mode and get the version from there.
3336         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3337         _ld_o='-out:$@'
3338         _flags_filter=msvc_flags
3339         _ld_lib='lib%.a'
3340         _ld_path='-libpath:'
3341     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3342         _type=cparser
3343         _ident=$($_cc --version | head -n1)
3344         _depflags='-MMD'
3345         _cflags_speed='-O4'
3346         _cflags_size='-O2'
3347         _flags_filter=cparser_flags
3348     fi
3349
3350     eval ${pfx}_type=\$_type
3351     eval ${pfx}_ident=\$_ident
3352 }
3353
3354 set_ccvars(){
3355     eval ${1}_C=\${_cc_c-\${${1}_C}}
3356     eval ${1}_E=\${_cc_e-\${${1}_E}}
3357     eval ${1}_O=\${_cc_o-\${${1}_O}}
3358
3359     if [ -n "$_depflags" ]; then
3360         eval ${1}_DEPFLAGS=\$_depflags
3361     else
3362         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3363         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3364         eval DEP${1}FLAGS=\$_flags
3365     fi
3366 }
3367
3368 probe_cc cc "$cc"
3369 cflags_filter=$_flags_filter
3370 cflags_speed=$_cflags_speed
3371 cflags_size=$_cflags_size
3372 cflags_noopt=$_cflags_noopt
3373 add_cflags $_flags $_cflags
3374 cc_ldflags=$_ldflags
3375 set_ccvars CC
3376
3377 probe_cc hostcc "$host_cc"
3378 host_cflags_filter=$_flags_filter
3379 host_cflags_speed=$_cflags_speed
3380 add_host_cflags  $_flags $_cflags
3381 set_ccvars HOSTCC
3382
3383 test -n "$cc_type" && enable $cc_type ||
3384     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3385
3386 : ${as_default:=$cc}
3387 : ${objcc_default:=$cc}
3388 : ${dep_cc_default:=$cc}
3389 : ${ld_default:=$cc}
3390 : ${host_ld_default:=$host_cc}
3391 set_default ar as objcc dep_cc ld host_ld
3392
3393 probe_cc as "$as"
3394 asflags_filter=$_flags_filter
3395 add_asflags $_flags $_cflags
3396 set_ccvars AS
3397
3398 probe_cc objcc "$objcc"
3399 objcflags_filter=$_flags_filter
3400 add_objcflags $_flags $_cflags
3401 set_ccvars OBJC
3402
3403 probe_cc ld "$ld"
3404 ldflags_filter=$_flags_filter
3405 add_ldflags $_flags $_ldflags
3406 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3407 LD_O=${_ld_o-$LD_O}
3408 LD_LIB=${_ld_lib-$LD_LIB}
3409 LD_PATH=${_ld_path-$LD_PATH}
3410
3411 probe_cc hostld "$host_ld"
3412 host_ldflags_filter=$_flags_filter
3413 add_host_ldflags $_flags $_ldflags
3414 HOSTLD_O=${_ld_o-$HOSTLD_O}
3415
3416 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3417     probe_cc depcc "$dep_cc"
3418     CCDEP=${_DEPCMD:-$DEPCMD}
3419     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3420     DEPCCFLAGS=$_flags
3421 fi
3422
3423 if $ar 2>&1 | grep -q Microsoft; then
3424     arflags="-nologo"
3425     ar_o='-out:$@'
3426 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3427     arflags="rq"
3428     ar_o='$@'
3429 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3430     arflags='-Xany -r -c'
3431     ar_o='$@'
3432 else
3433     arflags="rc"
3434     ar_o='$@'
3435 fi
3436
3437 add_cflags $extra_cflags
3438 add_objcflags $extra_objcflags
3439 add_asflags $extra_cflags
3440
3441 if test -n "$sysroot"; then
3442     case "$cc_type" in
3443         gcc|llvm_gcc|clang)
3444             add_cppflags --sysroot="$sysroot"
3445             add_ldflags --sysroot="$sysroot"
3446         ;;
3447         tms470)
3448             add_cppflags -I"$sysinclude"
3449             add_ldflags  --sysroot="$sysroot"
3450         ;;
3451     esac
3452 fi
3453
3454 if test "$cpu" = host; then
3455     enabled cross_compile &&
3456         die "--cpu=host makes no sense when cross-compiling."
3457
3458     case "$cc_type" in
3459         gcc|llvm_gcc)
3460             check_native(){
3461                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3462                 sed -n "/cc1.*$1=/{
3463                             s/.*$1=\\([^ ]*\\).*/\\1/
3464                             p
3465                             q
3466                         }" $TMPE
3467             }
3468             cpu=$(check_native -march || check_native -mcpu)
3469         ;;
3470     esac
3471
3472     test "${cpu:-host}" = host &&
3473         die "--cpu=host not supported with compiler $cc"
3474 fi
3475
3476 # Deal with common $arch aliases
3477 case "$arch" in
3478     aarch64|arm64)
3479         arch="aarch64"
3480     ;;
3481     arm*)
3482         arch="arm"
3483     ;;
3484     mips*|IP*)
3485         case "$arch" in
3486         *el)
3487             add_cppflags -EL
3488             add_ldflags -EL
3489         ;;
3490         *eb)
3491             add_cppflags -EB
3492             add_ldflags -EB
3493         ;;
3494         esac
3495         arch="mips"
3496     ;;
3497     parisc*|hppa*)
3498         arch="parisc"
3499     ;;
3500     "Power Macintosh"|ppc*|powerpc*)
3501         arch="ppc"
3502     ;;
3503     s390|s390x)
3504         arch="s390"
3505     ;;
3506     sh4|sh)
3507         arch="sh4"
3508     ;;
3509     sun4u|sparc*)
3510         arch="sparc"
3511     ;;
3512     tilegx|tile-gx)
3513         arch="tilegx"
3514     ;;
3515     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3516         arch="x86"
3517     ;;
3518 esac
3519
3520 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3521 enable $arch
3522
3523 # Add processor-specific flags
3524 if enabled aarch64; then
3525
3526     case $cpu in
3527         armv*)
3528             cpuflags="-march=$cpu"
3529         ;;
3530         *)
3531             cpuflags="-mcpu=$cpu"
3532         ;;
3533     esac
3534
3535 elif enabled alpha; then
3536
3537     cpuflags="-mcpu=$cpu"
3538
3539 elif enabled arm; then
3540
3541     check_arm_arch() {
3542         check_cpp_condition stddef.h \
3543             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3544             $cpuflags
3545     }
3546
3547     probe_arm_arch() {
3548         if   check_arm_arch 4;        then echo armv4
3549         elif check_arm_arch 4T;       then echo armv4t
3550         elif check_arm_arch 5;        then echo armv5
3551         elif check_arm_arch 5E;       then echo armv5e
3552         elif check_arm_arch 5T;       then echo armv5t
3553         elif check_arm_arch 5TE;      then echo armv5te
3554         elif check_arm_arch 5TEJ;     then echo armv5te
3555         elif check_arm_arch 6;        then echo armv6
3556         elif check_arm_arch 6J;       then echo armv6j
3557         elif check_arm_arch 6K;       then echo armv6k
3558         elif check_arm_arch 6Z;       then echo armv6z
3559         elif check_arm_arch 6ZK;      then echo armv6zk
3560         elif check_arm_arch 6T2;      then echo armv6t2
3561         elif check_arm_arch 7;        then echo armv7
3562         elif check_arm_arch 7A  7_A;  then echo armv7-a
3563         elif check_arm_arch 7S;       then echo armv7-a
3564         elif check_arm_arch 7R  7_R;  then echo armv7-r
3565         elif check_arm_arch 7M  7_M;  then echo armv7-m
3566         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3567         elif check_arm_arch 8A  8_A;  then echo armv8-a
3568         fi
3569     }
3570
3571     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3572
3573     case $cpu in
3574         armv*)
3575             cpuflags="-march=$cpu"
3576             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3577         ;;
3578         *)
3579             cpuflags="-mcpu=$cpu"
3580             case $cpu in
3581                 cortex-a*)                               subarch=armv7a  ;;
3582                 cortex-r*)                               subarch=armv7r  ;;
3583                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3584                 arm11*)                                  subarch=armv6   ;;
3585                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3586                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3587                 *)                             subarch=$(probe_arm_arch) ;;
3588             esac
3589         ;;
3590     esac
3591
3592     case "$subarch" in
3593         armv5t*)    enable fast_clz                ;;
3594         armv[6-8]*) enable fast_clz fast_unaligned ;;
3595     esac
3596
3597 elif enabled avr32; then
3598
3599     case $cpu in
3600         ap7[02]0[0-2])
3601             subarch="avr32_ap"
3602             cpuflags="-mpart=$cpu"
3603         ;;
3604         ap)
3605             subarch="avr32_ap"
3606             cpuflags="-march=$cpu"
3607         ;;
3608         uc3[ab]*)
3609             subarch="avr32_uc"
3610             cpuflags="-mcpu=$cpu"
3611         ;;
3612         uc)
3613             subarch="avr32_uc"
3614             cpuflags="-march=$cpu"
3615         ;;
3616     esac
3617
3618 elif enabled bfin; then
3619
3620     cpuflags="-mcpu=$cpu"
3621
3622 elif enabled mips; then
3623
3624     cpuflags="-march=$cpu"
3625
3626 elif enabled ppc; then
3627
3628     disable ldbrx
3629
3630     case $(tolower $cpu) in
3631         601|ppc601|powerpc601)
3632             cpuflags="-mcpu=601"
3633             disable altivec
3634         ;;
3635         603*|ppc603*|powerpc603*)
3636             cpuflags="-mcpu=603"
3637             disable altivec
3638         ;;
3639         604*|ppc604*|powerpc604*)
3640             cpuflags="-mcpu=604"
3641             disable altivec
3642         ;;
3643         g3|75*|ppc75*|powerpc75*)
3644             cpuflags="-mcpu=750"
3645             disable altivec
3646         ;;
3647         g4|745*|ppc745*|powerpc745*)
3648             cpuflags="-mcpu=7450"
3649             disable vsx
3650         ;;
3651         74*|ppc74*|powerpc74*)
3652             cpuflags="-mcpu=7400"
3653             disable vsx
3654         ;;
3655         g5|970|ppc970|powerpc970)
3656             cpuflags="-mcpu=970"
3657             disable vsx
3658         ;;
3659         power[3-6]*)
3660             cpuflags="-mcpu=$cpu"
3661             disable vsx
3662         ;;
3663         power[7-8]*)
3664             cpuflags="-mcpu=$cpu"
3665             enable ldbrx
3666         ;;
3667         cell)
3668             cpuflags="-mcpu=cell"
3669             enable ldbrx
3670             disable vsx
3671         ;;
3672         e500mc)
3673             cpuflags="-mcpu=e500mc"
3674             disable altivec
3675         ;;
3676         e500v2)
3677             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3678             disable altivec
3679             disable dcbzl
3680         ;;
3681         e500)
3682             cpuflags="-mcpu=8540 -mhard-float"
3683             disable altivec
3684             disable dcbzl
3685         ;;
3686     esac
3687
3688 elif enabled sparc; then
3689
3690     case $cpu in
3691         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3692             cpuflags="-mcpu=$cpu"
3693         ;;
3694         ultrasparc*|niagara[234])
3695             cpuflags="-mcpu=$cpu"
3696         ;;
3697     esac
3698
3699 elif enabled x86; then
3700
3701     case $cpu in
3702         i[345]86|pentium)
3703             cpuflags="-march=$cpu"
3704             disable i686
3705             disable mmx
3706         ;;
3707         # targets that do NOT support nopl and conditional mov (cmov)
3708         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3709             cpuflags="-march=$cpu"
3710             disable i686
3711         ;;
3712         # targets that do support nopl and conditional mov (cmov)
3713         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3714             cpuflags="-march=$cpu"
3715             enable i686
3716             enable fast_cmov
3717         ;;
3718         # targets that do support conditional mov but on which it's slow
3719         pentium4|pentium4m|prescott|nocona)
3720             cpuflags="-march=$cpu"
3721             enable i686
3722             disable fast_cmov
3723         ;;
3724     esac
3725
3726 fi
3727
3728 if [ "$cpu" != generic ]; then
3729     add_cflags  $cpuflags
3730     add_asflags $cpuflags
3731     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3732 fi
3733
3734 # compiler sanity check
3735 check_exec <<EOF
3736 int main(void){ return 0; }
3737 EOF
3738 if test "$?" != 0; then
3739     echo "$cc is unable to create an executable file."
3740     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3741         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3742         echo "Only do this if you know what cross compiling means."
3743     fi
3744     die "C compiler test failed."
3745 fi
3746
3747 add_cppflags -D_ISOC99_SOURCE
3748
3749 # some compilers silently accept -std=c11, so we also need to check that the
3750 # version macro is defined properly
3751 if test_cflags_cpp -std=c11 "__STDC_VERSION__ >= 201112L"; then
3752     add_cflags -std=c11
3753 else
3754     check_cflags -std=c99
3755 fi
3756
3757 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3758 #include <stdlib.h>
3759 EOF
3760 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3761 #include <stdlib.h>
3762 EOF
3763
3764 add_host_cppflags -D_ISOC99_SOURCE
3765 check_host_cflags -std=c99
3766 check_host_cflags -Wall
3767 check_host_cflags $host_cflags_speed
3768
3769 check_64bit(){
3770     arch32=$1
3771     arch64=$2
3772     expr=$3
3773     check_code cc "" "int test[2*($expr) - 1]" &&
3774         subarch=$arch64 || subarch=$arch32
3775 }
3776
3777 case "$arch" in
3778     aarch64|alpha|ia64)
3779         spic=$shared
3780     ;;
3781     mips)
3782         check_64bit mips mips64 '_MIPS_SIM > 1'
3783         spic=$shared
3784     ;;
3785     parisc)
3786         check_64bit parisc parisc64 'sizeof(void *) > 4'
3787         spic=$shared
3788     ;;
3789     ppc)
3790         check_64bit ppc ppc64 'sizeof(void *) > 4'
3791         spic=$shared
3792     ;;
3793     s390)
3794         check_64bit s390 s390x 'sizeof(void *) > 4'
3795         spic=$shared
3796     ;;
3797     sparc)
3798         check_64bit sparc sparc64 'sizeof(void *) > 4'
3799         spic=$shared
3800     ;;
3801     x86)
3802         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3803         if test "$subarch" = "x86_64"; then
3804             spic=$shared
3805         fi
3806     ;;
3807 esac
3808
3809 enable $subarch
3810 enabled spic && enable_weak pic
3811
3812 # OS specific
3813 case $target_os in
3814     aix)
3815         SHFLAGS=-shared
3816         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3817         enabled shared && add_ldflags -Wl,-brtl
3818         ;;
3819     android)
3820         disable symver
3821         enable section_data_rel_ro
3822         SLIB_INSTALL_NAME='$(SLIBNAME)'
3823         SLIB_INSTALL_LINKS=
3824         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3825         ;;
3826     haiku)
3827         prefix_default="/boot/common"
3828         network_extralibs="-lnetwork"
3829         host_extralibs=
3830         ;;
3831     sunos)
3832         SHFLAGS='-shared -Wl,-h,$$(@F)'
3833         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3834         network_extralibs="-lsocket -lnsl"
3835         # When using suncc to build, the Solaris linker will mark
3836         # an executable with each instruction set encountered by
3837         # the Solaris assembler.  As our libraries contain their own
3838         # guards for processor-specific code, instead suppress
3839         # generation of the HWCAPS ELF section on Solaris x86 only.
3840         enabled_all suncc x86 &&
3841             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3842             add_ldflags -Wl,-M,mapfile
3843         nm_default='nm -P -g'
3844         version_script='-M'
3845         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3846         ;;
3847     netbsd)
3848         disable symver
3849         oss_indev_extralibs="-lossaudio"
3850         oss_outdev_extralibs="-lossaudio"
3851         ;;
3852     openbsd|bitrig)
3853         disable symver
3854         SHFLAGS='-shared'
3855         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3856         SLIB_INSTALL_LINKS=
3857         oss_indev_extralibs="-lossaudio"
3858         oss_outdev_extralibs="-lossaudio"
3859         ;;
3860     dragonfly)
3861         disable symver
3862         ;;
3863     freebsd)
3864         ;;
3865     bsd/os)
3866         add_extralibs -lpoll -lgnugetopt
3867         ;;
3868     darwin)
3869         enabled ppc && add_asflags -force_cpusubtype_ALL
3870         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3871         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3872         add_ldflags -Wl,-dynamic,-search_paths_first
3873         SLIBSUF=".dylib"
3874         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3875         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3876         objformat="macho"
3877         enabled x86_64 && objformat="macho64"
3878         enabled_any pic shared ||
3879             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3880         check_header dispatch/dispatch.h &&
3881             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3882         ;;
3883     msys*)
3884         die "Native MSYS builds are discouraged, please use the MINGW environment."
3885         ;;
3886     mingw32*|mingw64*)
3887         if test $target_os = "mingw32ce"; then
3888             disable network
3889         else
3890             target_os=mingw32
3891         fi
3892         LIBTARGET=i386
3893         if enabled x86_64; then
3894             LIBTARGET="i386:x86-64"
3895         elif enabled arm; then
3896             LIBTARGET=arm-wince
3897         fi
3898         check_ldflags -Wl,--nxcompat
3899         check_ldflags -Wl,--dynamicbase
3900         shlibdir_default="$bindir_default"
3901         SLIBPREF=""
3902         SLIBSUF=".dll"
3903         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3904         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3905         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3906         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3907         SLIB_INSTALL_LINKS=
3908         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3909         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3910         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3911         objformat="win32"
3912         dlltool="${cross_prefix}dlltool"
3913         ranlib=:
3914         enable dos_paths
3915         ;;
3916     win32|win64)
3917         disable symver
3918         if enabled shared; then
3919             # Link to the import library instead of the normal static library
3920             # for shared libs.
3921             LD_LIB='%.lib'
3922             # Cannot build both shared and static libs with MSVC or icl.
3923             disable static
3924         fi
3925         shlibdir_default="$bindir_default"
3926         SLIBPREF=""
3927         SLIBSUF=".dll"
3928         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3929         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3930         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3931         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3932         SLIB_INSTALL_LINKS=
3933         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3934         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3935         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3936         objformat="win32"
3937         ranlib=:
3938         enable dos_paths
3939         ;;
3940     cygwin*)
3941         target_os=cygwin
3942         shlibdir_default="$bindir_default"
3943         SLIBPREF="cyg"
3944         SLIBSUF=".dll"
3945         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3946         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3947         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3948         SLIB_INSTALL_LINKS=
3949         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3950         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3951         objformat="win32"
3952         enable dos_paths
3953         ;;
3954     *-dos|freedos|opendos)
3955         network_extralibs="-lsocket"
3956         objformat="coff"
3957         enable dos_paths
3958         add_cppflags -U__STRICT_ANSI__
3959         ;;
3960     linux)
3961         enable dv1394
3962         enable section_data_rel_ro
3963         ;;
3964     irix*)
3965         target_os=irix
3966         ranlib="echo ignoring ranlib"
3967         ;;
3968     os/2*)
3969         ln_s="cp -f"
3970         objformat="aout"
3971         add_cppflags -D_GNU_SOURCE
3972         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
3973         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3974         LIBSUF="_s.a"
3975         SLIBPREF=""
3976         SLIBSUF=".dll"
3977         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3978         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3979         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3980             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3981             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3982             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3983             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3984         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3985             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3986         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3987         enable dos_paths
3988         ;;
3989     gnu/kfreebsd)
3990         add_cppflags -D_BSD_SOURCE
3991         ;;
3992     gnu)
3993         ;;
3994     qnx)
3995         add_cppflags -D_QNX_SOURCE
3996         network_extralibs="-lsocket"
3997         ;;
3998     symbian)
3999         SLIBSUF=".dll"
4000         enable dos_paths
4001         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4002         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4003         add_ldflags -Wl,--target1-abs,--no-undefined \
4004                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4005                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4006         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4007                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4008                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4009         ;;
4010     osf1)
4011         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4012         ;;
4013     minix)
4014         ;;
4015     none)
4016         ;;
4017     *)
4018         die "Unknown OS '$target_os'."
4019         ;;
4020 esac
4021
4022 # determine libc flavour
4023
4024 probe_libc(){
4025     pfx=$1
4026     pfx_no_=${pfx%_}
4027     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4028     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4029         eval ${pfx}libc_type=uclibc
4030         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4031     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4032         eval ${pfx}libc_type=glibc
4033         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4034     # MinGW headers can be installed on Cygwin, so check for newlib first.
4035     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4036         eval ${pfx}libc_type=newlib
4037         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4038     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4039     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4040         eval ${pfx}libc_type=mingw64
4041         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4042         eval test \$${pfx_no_}cc_type = "gcc" &&
4043             add_${pfx}cppflags -D__printf__=__gnu_printf__
4044     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4045          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4046         eval ${pfx}libc_type=mingw32
4047         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4048             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4049             die "ERROR: MinGW32 runtime version must be >= 3.15."
4050         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4051         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4052             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4053         eval test \$${pfx_no_}cc_type = "gcc" &&
4054             add_${pfx}cppflags -D__printf__=__gnu_printf__
4055     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4056         eval ${pfx}libc_type=msvcrt
4057         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4058             if [ "$pfx" = host_ ]; then
4059                 add_host_cppflags -Dsnprintf=_snprintf
4060             else
4061                 add_compat strtod.o strtod=avpriv_strtod
4062                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4063                                              _snprintf=avpriv_snprintf  \
4064                                              vsnprintf=avpriv_vsnprintf
4065             fi
4066         fi
4067         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4068         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4069         # 0x601 by default unless something else is set by the user.
4070         # This can easily lead to us detecting functions only present
4071         # in such new versions and producing binaries requiring windows 7.0.
4072         # Therefore explicitly set the default to XP unless the user has
4073         # set something else on the command line.
4074         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4075         # family. For these cases, configure is free to use any functions
4076         # found in the SDK headers by default. (Alternatively, we could force
4077         # _WIN32_WINNT to 0x0602 in that case.)
4078         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4079             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4080 #ifdef WINAPI_FAMILY
4081 #include <winapifamily.h>
4082 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4083 #error not desktop
4084 #endif
4085 #endif
4086 EOF
4087         if [ "$pfx" = "" ]; then
4088             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4089         fi
4090     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4091         eval ${pfx}libc_type=klibc
4092     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4093         eval ${pfx}libc_type=bionic
4094     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4095         eval ${pfx}libc_type=solaris
4096         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4097     else
4098         eval ${pfx}libc_type=default
4099         add_${pfx}cppflags -D_DEFAULT_SOURCE
4100     fi
4101 }
4102
4103 probe_libc
4104 test -n "$libc_type" && enable libc_$libc_type
4105 probe_libc host_
4106 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4107
4108 case $libc_type in
4109     bionic)
4110         add_compat strtod.o strtod=avpriv_strtod
4111         ;;
4112 esac
4113
4114 # hacks for compiler/libc/os combinations
4115
4116 if enabled_all tms470 libc_glibc; then
4117     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4118     add_cppflags -D__USER_LABEL_PREFIX__=
4119     add_cppflags -D__builtin_memset=memset
4120     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4121     add_cflags   -pds=48    # incompatible redefinition of macro
4122 fi
4123
4124 if enabled_all ccc libc_glibc; then
4125     add_ldflags -Wl,-z,now  # calls to libots crash without this
4126 fi
4127
4128 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4129     add_cppflags '-I\$(SRC_PATH)/compat/float'
4130
4131 esc(){
4132     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4133 }
4134
4135 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
4136
4137 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4138
4139 set_default $PATHS_LIST
4140 set_default nm
4141
4142 # we need to build at least one lib type
4143 if ! enabled_any static shared; then
4144     cat <<EOF
4145 At least one library type must be built.
4146 Specify --enable-static to build the static libraries or --enable-shared to
4147 build the shared libraries as well. To only build the shared libraries specify
4148 --disable-static in addition to --enable-shared.
4149 EOF
4150     exit 1
4151 fi
4152
4153 disabled optimizations || check_cflags -fomit-frame-pointer
4154
4155 enable_weak_pic() {
4156     disabled pic && return
4157     enable pic
4158     add_cppflags -DPIC
4159     case "$target_os" in
4160     mingw*|cygwin*)
4161         ;;
4162     *)
4163         add_cflags -fPIC
4164         ;;
4165     esac
4166     add_asflags  -fPIC
4167 }
4168
4169 enabled pic && enable_weak_pic
4170
4171 check_cc <<EOF || die "Symbol mangling check failed."
4172 int ff_extern;
4173 EOF
4174 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4175 extern_prefix=${sym%%ff_extern*}
4176
4177 check_cc <<EOF && enable_weak inline_asm
4178 void foo(void) { __asm__ volatile ("" ::); }
4179 EOF
4180
4181 _restrict=
4182 for restrict_keyword in restrict __restrict__ __restrict; do
4183     check_cc <<EOF && _restrict=$restrict_keyword && break
4184 void foo(char * $restrict_keyword p);
4185 EOF
4186 done
4187
4188 check_cc <<EOF && enable pragma_deprecated
4189 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4190 EOF
4191
4192 check_cc <<EOF && enable attribute_packed
4193 struct { int x; } __attribute__((packed)) x;
4194 EOF
4195
4196 check_cc <<EOF && enable attribute_may_alias
4197 union { int x; } __attribute__((may_alias)) x;
4198 EOF
4199
4200 check_cc <<EOF || die "endian test failed"
4201 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4202 EOF
4203 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4204
4205 check_gas() {
4206     log "check_gas using '$as' as AS"
4207     # :vararg is used on aarch64, arm and ppc altivec
4208     check_as <<EOF || return 1
4209 .macro m n, y:vararg=0
4210 \n: .int \y
4211 .endm
4212 m x
4213 EOF
4214     # .altmacro is only used in arm asm
4215     ! enabled arm || check_as <<EOF || return 1
4216 .altmacro
4217 EOF
4218     enable gnu_as
4219     return 0
4220 }
4221
4222 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4223     nogas=:
4224     enabled_any arm aarch64 && nogas=die
4225     enabled_all ppc altivec && nogas=warn
4226     as_noop=-v
4227
4228     case $as_type in
4229         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4230         gcc)  gaspp_as_type=gas ;;
4231         *)    gaspp_as_type=$as_type ;;
4232     esac
4233
4234     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4235
4236     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4237         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4238
4239     if ! check_gas ; then
4240         as=${gas:=$as}
4241         check_gas || \
4242             $nogas "GNU assembler not found, install/update gas-preprocessor"
4243     fi
4244
4245     check_as <<EOF && enable as_func
4246 .func test
4247 .endfunc
4248 EOF
4249 fi
4250
4251 check_inline_asm inline_asm_labels '"1:\n"'
4252
4253 if enabled aarch64; then
4254     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4255     # internal assembler in clang 3.3 does not support this instruction
4256     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4257     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4258
4259     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4260
4261 elif enabled alpha; then
4262
4263     check_cflags -mieee
4264
4265 elif enabled arm; then
4266
4267     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4268     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4269     enabled thumb && check_cflags -mthumb || check_cflags -marm
4270
4271     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4272         enable vfp_args
4273     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4274         enable vfp_args
4275     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4276         case "${cross_prefix:-$cc}" in
4277             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4278             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4279 __asm__ (".eabi_attribute 28, 1");
4280 int main(void) { return 0; }
4281 EOF
4282         esac
4283         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4284     fi
4285
4286     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4287     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4288     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4289     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4290     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4291     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4292
4293     [ $target_os = linux ] || [ $target_os = android ] ||
4294         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4295             $ARCH_EXT_LIST_ARM
4296
4297     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4298
4299     check_as <<EOF && enable as_dn_directive
4300 ra .dn d0.i16
4301 .unreq ra
4302 EOF
4303     check_as <<EOF && enable as_fpu_directive
4304 .fpu neon
4305 EOF
4306
4307     # llvm's integrated assembler supports .object_arch from llvm 3.5
4308     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4309 .object_arch armv4
4310 EOF
4311
4312     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4313
4314 elif enabled mips; then
4315
4316     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4317
4318     # make sure that only an instruction set is enabled
4319     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4320
4321     if enabled mips64; then
4322         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4323             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4324                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4325     else
4326         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4327             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4328                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4329     fi
4330
4331 elif enabled parisc; then
4332
4333     if enabled gcc; then
4334         case $($cc -dumpversion) in
4335             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4336         esac
4337     fi
4338
4339 elif enabled ppc; then
4340
4341     enable local_aligned_8 local_aligned_16 local_aligned_32
4342
4343     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4344     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4345     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4346     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4347
4348     # AltiVec flags: The FSF version of GCC differs from the Apple version
4349     if enabled altivec; then
4350         check_cflags -maltivec -mabi=altivec &&
4351         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4352         check_cflags -faltivec
4353
4354         # check if our compiler supports Motorola AltiVec C API
4355         check_cc <<EOF || disable altivec
4356 $inc_altivec_h
4357 int main(void) {
4358     vector signed int v1 = (vector signed int) { 0 };
4359     vector signed int v2 = (vector signed int) { 1 };
4360     v1 = vec_add(v1, v2);
4361     return 0;
4362 }
4363 EOF
4364
4365         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4366     fi
4367
4368     if enabled vsx; then
4369         check_cflags -mvsx &&
4370         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4371     fi
4372
4373     if enabled power8; then
4374         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4375     fi
4376
4377 elif enabled x86; then
4378
4379     check_builtin rdtsc    intrin.h   "__rdtsc()"
4380     check_builtin mm_empty mmintrin.h "_mm_empty()"
4381
4382     enable local_aligned_8 local_aligned_16 local_aligned_32
4383
4384     # check whether EBP is available on x86
4385     # As 'i' is stored on the stack, this program will crash
4386     # if the base pointer is used to access it because the
4387     # base pointer is cleared in the inline assembly code.
4388     check_exec_crash <<EOF && enable ebp_available
4389 volatile int i=0;
4390 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4391 return i;
4392 EOF
4393
4394     # check whether EBX is available on x86
4395     check_inline_asm ebx_available '""::"b"(0)' &&
4396         check_inline_asm ebx_available '"":::"%ebx"'
4397
4398     # check whether xmm clobbers are supported
4399     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4400
4401     # check whether binutils is new enough to compile SSSE3/MMXEXT
4402     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4403     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4404
4405     if ! disabled_any asm mmx yasm; then
4406         if check_cmd $yasmexe --version; then
4407             enabled x86_64 && yasm_extra="-m amd64"
4408             yasm_debug="-g dwarf2"
4409         elif check_cmd nasm -v; then
4410             yasmexe=nasm
4411             yasm_debug="-g -F dwarf"
4412             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4413         fi
4414
4415         YASMFLAGS="-f $objformat $yasm_extra"
4416         enabled pic               && append YASMFLAGS "-DPIC"
4417         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4418         case "$objformat" in
4419             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4420         esac
4421
4422         check_yasm "movbe ecx, [5]" && enable yasm ||
4423             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4424         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4425         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4426         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4427         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4428         check_yasm "CPU amdnop" || disable cpunop
4429     fi
4430
4431     case "$cpu" in
4432         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4433             disable fast_clz
4434         ;;
4435     esac
4436
4437 fi
4438
4439 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4440
4441 check_ldflags -Wl,--as-needed
4442
4443 if check_func dlopen; then
4444     ldl=
4445 elif check_func dlopen -ldl; then
4446     ldl=-ldl
4447 fi
4448
4449 if ! disabled network; then
4450     check_func getaddrinfo $network_extralibs
4451     check_func inet_aton $network_extralibs
4452
4453     check_type netdb.h "struct addrinfo"
4454     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4455     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4456     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4457     check_type poll.h "struct pollfd"
4458     check_type netinet/sctp.h "struct sctp_event_subscribe"
4459     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4460     check_type netinet/in.h "struct sockaddr_in6"
4461     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4462     check_type "sys/types.h sys/socket.h" socklen_t
4463
4464     # Prefer arpa/inet.h over winsock2
4465     if check_header arpa/inet.h ; then
4466         check_func closesocket
4467     elif check_header winsock2.h ; then
4468         check_func_headers winsock2.h closesocket -lws2 &&
4469             network_extralibs="-lws2" ||
4470         { check_func_headers winsock2.h closesocket -lws2_32 &&
4471             network_extralibs="-lws2_32"; } || disable winsock2_h network
4472         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4473
4474         check_type ws2tcpip.h socklen_t
4475         check_type ws2tcpip.h "struct addrinfo"
4476         check_type ws2tcpip.h "struct group_source_req"
4477         check_type ws2tcpip.h "struct ip_mreq_source"
4478         check_type ws2tcpip.h "struct ipv6_mreq"
4479         check_type winsock2.h "struct pollfd"
4480         check_struct winsock2.h "struct sockaddr" sa_len
4481         check_type ws2tcpip.h "struct sockaddr_in6"
4482         check_type ws2tcpip.h "struct sockaddr_storage"
4483     else
4484         disable network
4485     fi
4486 fi
4487
4488 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4489 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4490 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4491 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4492
4493 case "$custom_allocator" in
4494     jemalloc)
4495         # jemalloc by default does not use a prefix
4496         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4497     ;;
4498     tcmalloc)
4499         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4500         malloc_prefix=tc_
4501     ;;
4502 esac
4503
4504 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4505 check_func  ${malloc_prefix}memalign            && enable memalign
4506 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4507
4508 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4509     check_func_headers time.h clock_gettime ||
4510         { check_lib clock_gettime time.h clock_gettime -lrt && LIBRT="-lrt"; }
4511
4512 check_func  fcntl
4513 check_func  fork
4514 check_func  gethrtime
4515 check_func  getopt
4516 check_func  getrusage
4517 check_func  gettimeofday
4518 check_func  gmtime_r
4519 check_func  isatty
4520 check_func  localtime_r
4521 check_func  mach_absolute_time
4522 check_func  mkstemp
4523 check_func  mmap
4524 check_func  mprotect
4525 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4526 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4527 check_func  sched_getaffinity
4528 check_func  setrlimit
4529 check_func  strerror_r
4530 check_func  sysconf
4531 check_func  sysctl
4532 check_func  usleep
4533
4534 check_func_headers io.h setmode
4535 check_func_headers stdlib.h getenv
4536
4537 check_func_headers windows.h GetProcessAffinityMask
4538 check_func_headers windows.h GetProcessTimes
4539 check_func_headers windows.h GetSystemTimeAsFileTime
4540 check_func_headers windows.h LoadLibrary
4541 check_func_headers windows.h MapViewOfFile
4542 check_func_headers windows.h SetConsoleTextAttribute
4543 check_func_headers windows.h Sleep
4544 check_func_headers windows.h VirtualAlloc
4545 check_struct windows.h "CONDITION_VARIABLE" Ptr
4546
4547 check_header d3d11.h
4548 check_header direct.h
4549 check_header dlfcn.h
4550 check_header dxva.h
4551 check_header dxva2api.h
4552 check_header io.h
4553 check_header mach/mach_time.h
4554 check_header malloc.h
4555 check_header poll.h
4556 check_header sys/mman.h
4557 check_header sys/param.h
4558 check_header sys/resource.h
4559 check_header sys/select.h
4560 check_header sys/time.h
4561 check_header sys/un.h
4562 check_header unistd.h
4563 check_header valgrind/valgrind.h
4564 check_header VideoDecodeAcceleration/VDADecoder.h
4565 check_header windows.h
4566 check_header X11/extensions/XvMClib.h
4567
4568 # it seems there are versions of clang in some distros that try to use the
4569 # gcc headers, which explodes for stdatomic
4570 # so we also check that atomics actually work here
4571 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4572
4573 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4574 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4575 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4576
4577 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4578
4579 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4580 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4581 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4582
4583 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4584 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4585 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4586 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4587 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4588 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4589
4590 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4591
4592 if ! disabled w32threads && ! enabled pthreads; then
4593     check_lib w32threads "windows.h process.h" _beginthreadex
4594 fi
4595
4596 # check for some common methods of building with pthread support
4597 # do this before the optional library checks as some of them require pthreads
4598 if ! disabled pthreads && ! enabled w32threads; then
4599     if check_lib pthreads pthread.h pthread_join -pthread; then
4600         add_cflags -pthread
4601     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4602         add_cflags -pthreads
4603     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4604         :
4605     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4606         :
4607     elif check_func pthread_join; then
4608         enable pthreads
4609     fi
4610 fi
4611
4612 enabled pthreads &&
4613     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4614
4615 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4616 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4617
4618 check_lib libm math.h sin -lm && LIBM="-lm"
4619
4620 atan2f_args=2
4621 ldexpf_args=2
4622 powf_args=2
4623
4624 for func in $MATH_FUNCS; do
4625     eval check_mathfunc $func \${${func}_args:-1} $LIBM
4626 done
4627
4628 # these are off by default, so fail if requested and not available
4629 enabled avisynth          && { check_header avisynth/avisynth_c.h || die "ERROR: avisynth/avisynth_c.h header not found"; }
4630 enabled avxsynth          && require avxsynth "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl
4631 enabled cuda              && require cuda cuda.h cuInit -lcuda
4632 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4633 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4634 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4635 enabled libdc1394         && require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new
4636 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4637 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4638 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4639 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4640 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4641 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4642                                    check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
4643                                done || die "ERROR: libgsm not found"; }
4644 enabled libhdcd           && require_pkg_config libhdcd "hdcd/hdcd_simple.h" hdcd_new
4645 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4646 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4647 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4648 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4649 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4650 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4651 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4652 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4653 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4654 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4655                                require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4656 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4657 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4658 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4659 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4660 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4661 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4662 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4663 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4664 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4665 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4666 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4667 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4668     enabled libvpx_vp8_decoder && {
4669         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4670             disable libvpx_vp8_decoder;
4671     }
4672     enabled libvpx_vp8_encoder && {
4673         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4674             disable libvpx_vp8_encoder;
4675     }
4676     enabled libvpx_vp9_decoder && {
4677         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4678             disable libvpx_vp9_decoder;
4679     }
4680     enabled libvpx_vp9_encoder && {
4681         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4682             disable libvpx_vp9_encoder;
4683     }
4684     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4685         die "libvpx enabled but no supported decoders found"
4686     fi
4687 }
4688 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4689 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4690 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4691                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4692                                die "ERROR: libx264 version must be >= 0.118."; } &&
4693                              { check_cpp_condition x264.h "X264_MPEG2" &&
4694                                enable libx262; }
4695 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4696                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4697                                die "ERROR: libx265 version must be >= 57."; }
4698 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4699 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4700 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4701                                { ! enabled cross_compile &&
4702                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4703                                  add_ldflags -L/opt/vc/lib/ &&
4704                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4705                                die "ERROR: mmal not found" &&
4706                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4707 enabled omx_rpi           && { check_header OMX_Core.h ||
4708                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4709                                die "ERROR: OpenMAX IL headers not found"; }
4710 enabled omx               && { check_header OMX_Core.h || die "ERROR: OpenMAX IL headers not found"; }
4711 enabled openssl           && { { check_pkg_config openssl openssl/ssl.h OPENSSL_init_ssl ||
4712                                  check_pkg_config openssl openssl/ssl.h SSL_library_init; } && {
4713                                add_cflags $openssl_cflags && add_extralibs $openssl_extralibs; } ||
4714                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4715                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4716                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4717                                die "ERROR: openssl not found"; }
4718
4719 enabled gnutls            && check_lib gmp gmp.h mpz_export -lgmp
4720
4721 if enabled nvenc; then
4722     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4723     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6" ||
4724         die "ERROR: NVENC API version 5 or older is not supported"
4725 fi
4726
4727 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4728     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4729     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4730     enable sdl
4731 fi
4732
4733 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4734 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4735
4736 check_header linux/fb.h
4737 check_header linux/videodev2.h
4738 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4739
4740 check_header AVFoundation/AVFoundation.h
4741
4742 check_header sys/videoio.h
4743
4744 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4745 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4746 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4747 # w32api 3.12 had it defined wrong
4748 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4749
4750 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4751 { check_header dev/bktr/ioctl_meteor.h &&
4752   check_header dev/bktr/ioctl_bt848.h; } ||
4753 { check_header machine/ioctl_meteor.h &&
4754   check_header machine/ioctl_bt848.h; } ||
4755 { check_header dev/video/meteor/ioctl_meteor.h &&
4756   check_header dev/video/bktr/ioctl_bt848.h; } ||
4757 check_header dev/ic/bt8xx.h
4758
4759 check_header sys/soundcard.h
4760 check_header soundcard.h
4761
4762 enabled_any alsa_indev alsa_outdev &&
4763     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4764
4765 enabled jack_indev && check_lib jack jack/jack.h jack_client_open -ljack &&
4766     check_func jack_port_get_latency_range -ljack
4767
4768 enabled_any sndio_indev sndio_outdev && check_lib sndio sndio.h sio_open -lsndio
4769
4770 if enabled libcdio; then
4771     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4772     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4773     die "ERROR: No usable libcdio/cdparanoia found"
4774 fi
4775
4776 if enabled libxcb; then
4777     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4778         enabled libxcb && die "ERROR: libxcb not found";
4779     } && enable libxcb
4780
4781     disabled libxcb_shm ||
4782         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4783             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4784         } && check_header sys/shm.h && enable libxcb_shm
4785
4786     disabled libxcb_xfixes ||
4787         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4788             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4789         } && enable libxcb_xfixes
4790
4791     add_cflags "$xcb_shape_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4792     add_extralibs "$xcb_shape_extralibs $xcb_shm_extralibs $xcb_xfixes_extralibs"
4793 fi
4794
4795 enabled dxva2 &&
4796     check_lib dxva2_lib windows.h CoTaskMemFree -lole32
4797
4798 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4799
4800 enabled vaapi &&
4801     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4802     disable vaapi
4803
4804 enabled vaapi &&
4805     check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
4806
4807 enabled vaapi &&
4808     check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
4809
4810 enabled vdpau &&
4811     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4812     disable vdpau
4813
4814 enabled vdpau &&
4815     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
4816
4817 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4818
4819 # add some useful compiler flags if supported
4820 check_cflags -Wdeclaration-after-statement
4821 check_cflags -Wall
4822 check_cflags -Wdisabled-optimization
4823 check_cflags -Wpointer-arith
4824 check_cflags -Wredundant-decls
4825 check_cflags -Wwrite-strings
4826 check_cflags -Wtype-limits
4827 check_cflags -Wundef
4828 check_cflags -Wmissing-prototypes
4829 check_cflags -Wstrict-prototypes
4830
4831 if enabled extra_warnings; then
4832     check_cflags -Wcast-qual
4833     check_cflags -Wextra
4834     check_cflags -Wpedantic
4835 fi
4836
4837 check_disable_warning(){
4838     warning_flag=-W${1#-Wno-}
4839     test_cflags $warning_flag && add_cflags $1
4840 }
4841
4842 check_disable_warning -Wno-parentheses
4843 check_disable_warning -Wno-switch