configure: Clean up temporary files on interrupt
[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 mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
2239 mpeg2_vaapi_encoder_select="vaapi_encode"
2240 mpeg4_omx_encoder_deps="omx"
2241 vc1_mmal_decoder_deps="mmal"
2242 vc1_qsv_decoder_deps="libmfx"
2243 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel vc1_parser"
2244 vp8_qsv_decoder_deps="libmfx"
2245 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
2246
2247 nvenc_h264_encoder_select="h264_nvenc_encoder"
2248 nvenc_hevc_encoder_select="hevc_nvenc_encoder"
2249
2250 # parsers
2251 h264_parser_select="golomb h264dsp h264parse"
2252 hevc_parser_select="hevc_ps"
2253 mpegaudio_parser_select="mpegaudioheader"
2254 mpegvideo_parser_select="mpegvideo"
2255 mpeg4video_parser_select="error_resilience h263dsp mpegvideo qpeldsp"
2256 vc1_parser_select="vc1dsp"
2257
2258 # bitstream_filters
2259 mjpeg2jpeg_bsf_select="jpegtables"
2260
2261 # external libraries
2262 avisynth_deps="LoadLibrary"
2263 avxsynth_deps="dlopen"
2264 avisynth_demuxer_deps_any="avisynth avxsynth"
2265 avisynth_demuxer_select="riffdec"
2266 libdcadec_decoder_deps="libdcadec"
2267 libfaac_encoder_deps="libfaac"
2268 libfaac_encoder_select="audio_frame_queue"
2269 libfdk_aac_decoder_deps="libfdk_aac"
2270 libfdk_aac_encoder_deps="libfdk_aac"
2271 libfdk_aac_encoder_select="audio_frame_queue"
2272 libgsm_decoder_deps="libgsm"
2273 libgsm_encoder_deps="libgsm"
2274 libgsm_ms_decoder_deps="libgsm"
2275 libgsm_ms_encoder_deps="libgsm"
2276 libilbc_decoder_deps="libilbc"
2277 libilbc_encoder_deps="libilbc"
2278 libkvazaar_encoder_deps="libkvazaar"
2279 libmp3lame_encoder_deps="libmp3lame"
2280 libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
2281 libopencore_amrnb_decoder_deps="libopencore_amrnb"
2282 libopencore_amrnb_encoder_deps="libopencore_amrnb"
2283 libopencore_amrnb_encoder_select="audio_frame_queue"
2284 libopencore_amrwb_decoder_deps="libopencore_amrwb"
2285 libopenh264_decoder_deps="libopenh264"
2286 libopenh264_decoder_select="h264_mp4toannexb_bsf"
2287 libopenh264_encoder_deps="libopenh264"
2288 libopenjpeg_decoder_deps="libopenjpeg"
2289 libopenjpeg_encoder_deps="libopenjpeg"
2290 libopus_decoder_deps="libopus"
2291 libopus_encoder_deps="libopus"
2292 libopus_encoder_select="audio_frame_queue"
2293 libschroedinger_decoder_deps="libschroedinger"
2294 libschroedinger_encoder_deps="libschroedinger"
2295 libspeex_decoder_deps="libspeex"
2296 libspeex_encoder_deps="libspeex"
2297 libspeex_encoder_select="audio_frame_queue"
2298 libtheora_encoder_deps="libtheora"
2299 libtwolame_encoder_deps="libtwolame"
2300 libvo_aacenc_encoder_deps="libvo_aacenc"
2301 libvo_aacenc_encoder_select="audio_frame_queue"
2302 libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
2303 libvorbis_encoder_deps="libvorbis"
2304 libvorbis_encoder_select="audio_frame_queue"
2305 libvpx_vp8_decoder_deps="libvpx"
2306 libvpx_vp8_encoder_deps="libvpx"
2307 libvpx_vp9_decoder_deps="libvpx"
2308 libvpx_vp9_encoder_deps="libvpx"
2309 libwavpack_encoder_deps="libwavpack"
2310 libwavpack_encoder_select="audio_frame_queue"
2311 libwebp_encoder_deps="libwebp"
2312 libx262_encoder_deps="libx262"
2313 libx264_encoder_deps="libx264"
2314 libx265_encoder_deps="libx265"
2315 libxavs_encoder_deps="libxavs"
2316 libxvid_encoder_deps="libxvid mkstemp"
2317
2318 # demuxers / muxers
2319 ac3_demuxer_select="ac3_parser"
2320 asf_demuxer_select="riffdec"
2321 asf_muxer_select="riffenc"
2322 asf_stream_muxer_select="asf_muxer"
2323 avi_demuxer_select="iso_media riffdec"
2324 avi_muxer_select="riffenc"
2325 caf_demuxer_select="iso_media riffdec"
2326 dash_muxer_select="mp4_muxer"
2327 dirac_demuxer_select="dirac_parser"
2328 dv_demuxer_select="dvprofile"
2329 dv_muxer_select="dvprofile"
2330 dxa_demuxer_select="riffdec"
2331 eac3_demuxer_select="ac3_parser"
2332 f4v_muxer_select="mov_muxer"
2333 flac_demuxer_select="flac_parser"
2334 hds_muxer_select="flv_muxer"
2335 hls_muxer_select="mpegts_muxer"
2336 ipod_muxer_select="mov_muxer"
2337 ismv_muxer_select="mov_muxer"
2338 matroska_audio_muxer_select="matroska_muxer"
2339 matroska_demuxer_select="iso_media riffdec"
2340 matroska_demuxer_suggest="bzlib lzo zlib"
2341 matroska_muxer_select="iso_media riffenc"
2342 mmf_muxer_select="riffenc"
2343 mov_demuxer_select="iso_media riffdec"
2344 mov_demuxer_suggest="zlib"
2345 mov_muxer_select="iso_media riffenc rtpenc_chain"
2346 mp3_demuxer_select="mpegaudio_parser"
2347 mp3_muxer_select="mpegaudioheader"
2348 mp4_muxer_select="mov_muxer"
2349 mpegts_demuxer_select="iso_media"
2350 mpegts_muxer_select="adts_muxer latm_muxer"
2351 mpegtsraw_demuxer_select="mpegts_demuxer"
2352 mxf_d10_muxer_select="mxf_muxer"
2353 nut_muxer_select="riffenc"
2354 nuv_demuxer_select="riffdec"
2355 oga_muxer_select="ogg_muxer"
2356 ogg_demuxer_select="dirac_parse"
2357 opus_muxer_select="ogg_muxer"
2358 psp_muxer_select="mov_muxer"
2359 rtp_demuxer_select="sdp_demuxer"
2360 rtpdec_select="asf_demuxer jpegtables mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
2361 rtsp_demuxer_select="http_protocol rtpdec"
2362 rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
2363 sap_demuxer_select="sdp_demuxer"
2364 sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
2365 sdp_demuxer_select="rtpdec"
2366 smoothstreaming_muxer_select="ismv_muxer"
2367 spdif_muxer_select="aac_parser"
2368 spx_muxer_select="ogg_muxer"
2369 swf_demuxer_suggest="zlib"
2370 tak_demuxer_select="tak_parser"
2371 tg2_muxer_select="mov_muxer"
2372 tgp_muxer_select="mov_muxer"
2373 w64_demuxer_select="wav_demuxer"
2374 wav_demuxer_select="riffdec"
2375 wav_muxer_select="riffenc"
2376 webm_muxer_select="iso_media riffenc"
2377 webm_muxer_suggest="libopus_encoder libvorbis_encoder libvpx_vp8_encoder libvpx_vp9_encoder"
2378 wtv_demuxer_select="mpegts_demuxer riffdec"
2379 xmv_demuxer_select="riffdec"
2380 xwma_demuxer_select="riffdec"
2381
2382 # indevs / outdevs
2383 alsa_indev_deps="alsa"
2384 alsa_outdev_deps="alsa"
2385 avfoundation_indev_deps="AVFoundation_AVFoundation_h objc_arc pthreads"
2386 avfoundation_indev_extralibs="-framework Foundation -framework AVFoundation -framework CoreVideo -framework CoreMedia"
2387 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
2388 dv1394_indev_deps="dv1394"
2389 dv1394_indev_select="dv_demuxer"
2390 fbdev_indev_deps="linux_fb_h"
2391 jack_indev_deps="jack"
2392 jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
2393 libcdio_indev_deps="libcdio"
2394 libdc1394_indev_deps="libdc1394"
2395 oss_indev_deps_any="soundcard_h sys_soundcard_h"
2396 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
2397 pulse_indev_deps="libpulse"
2398 sndio_indev_deps="sndio"
2399 sndio_outdev_deps="sndio"
2400 v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
2401 vfwcap_indev_deps="vfw32 vfwcap_defines"
2402 xcbgrab_indev_deps="libxcb"
2403
2404 # protocols
2405 ffrtmpcrypt_protocol_deps="!librtmp_protocol"
2406 ffrtmpcrypt_protocol_deps_any="gmp openssl"
2407 ffrtmpcrypt_protocol_select="tcp_protocol"
2408 ffrtmphttp_protocol_deps="!librtmp_protocol"
2409 ffrtmphttp_protocol_select="http_protocol"
2410 gopher_protocol_select="network"
2411 http_protocol_select="tcp_protocol"
2412 httpproxy_protocol_select="tcp_protocol"
2413 https_protocol_select="tls_protocol"
2414 icecast_protocol_select="http_protocol"
2415 librtmp_protocol_deps="librtmp"
2416 librtmpe_protocol_deps="librtmp"
2417 librtmps_protocol_deps="librtmp"
2418 librtmpt_protocol_deps="librtmp"
2419 librtmpte_protocol_deps="librtmp"
2420 mmsh_protocol_select="http_protocol"
2421 mmst_protocol_select="network"
2422 rtmp_protocol_deps="!librtmp_protocol"
2423 rtmp_protocol_select="tcp_protocol"
2424 rtmpe_protocol_select="ffrtmpcrypt_protocol"
2425 rtmps_protocol_deps="!librtmp_protocol"
2426 rtmps_protocol_select="tls_protocol"
2427 rtmpt_protocol_select="ffrtmphttp_protocol"
2428 rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
2429 rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
2430 rtp_protocol_select="udp_protocol"
2431 sctp_protocol_deps="struct_sctp_event_subscribe"
2432 sctp_protocol_select="network"
2433 srtp_protocol_select="rtp_protocol srtp"
2434 tcp_protocol_select="network"
2435 tls_gnutls_protocol_deps="gnutls"
2436 tls_gnutls_protocol_select="tcp_protocol"
2437 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
2438 tls_openssl_protocol_select="tcp_protocol"
2439 tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
2440 udp_protocol_select="network"
2441 unix_protocol_deps="sys_un_h"
2442 unix_protocol_select="network"
2443
2444 # filters
2445 asyncts_filter_deps="avresample"
2446 blackframe_filter_deps="gpl"
2447 boxblur_filter_deps="gpl"
2448 bs2b_filter_deps="libbs2b"
2449 cropdetect_filter_deps="gpl"
2450 deinterlace_qsv_filter_deps="libmfx"
2451 deinterlace_vaapi_filter_deps="vaapi"
2452 delogo_filter_deps="gpl"
2453 drawtext_filter_deps="libfreetype"
2454 frei0r_filter_deps="frei0r dlopen"
2455 frei0r_filter_extralibs='$ldl'
2456 frei0r_src_filter_deps="frei0r dlopen"
2457 frei0r_src_filter_extralibs='$ldl'
2458 hdcd_filter_deps="libhdcd"
2459 hqdn3d_filter_deps="gpl"
2460 interlace_filter_deps="gpl"
2461 movie_filter_deps="avcodec avformat"
2462 ocv_filter_deps="libopencv"
2463 resample_filter_deps="avresample"
2464 scale_filter_deps="swscale"
2465 scale_qsv_filter_deps="libmfx"
2466 scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
2467
2468 # examples
2469 decode_audio_example_deps="avcodec avutil"
2470 decode_video_example_deps="avcodec avutil"
2471 encode_audio_example_deps="avcodec avutil"
2472 encode_video_example_deps="avcodec avutil"
2473 filter_audio_example_deps="avfilter avutil"
2474 metadata_example_deps="avformat avutil"
2475 output_example_deps="avcodec avformat avresample avutil swscale"
2476 qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder"
2477 transcode_aac_example_deps="avcodec avformat avresample"
2478
2479 # libraries, in linking order
2480 avcodec_deps="avutil"
2481 avcodec_select="null_bsf"
2482 avdevice_deps="avformat avcodec avutil"
2483 avfilter_deps="avutil"
2484 avformat_deps="avcodec avutil"
2485 avresample_deps="avutil"
2486 swscale_deps="avutil"
2487
2488 # programs
2489 avconv_deps="avcodec avfilter avformat avresample swscale"
2490 avconv_select="aformat_filter anull_filter asyncts_filter atrim_filter format_filter
2491                fps_filter null_filter resample_filter scale_filter
2492                trim_filter"
2493 avplay_deps="avcodec avfilter avformat avresample sdl"
2494 avplay_extralibs='$sdl_extralibs'
2495 avplay_select="rdft format_filter transpose_filter hflip_filter vflip_filter"
2496 avprobe_deps="avcodec avformat"
2497
2498 # documentation
2499 pod2man_deps="doc"
2500 texi2html_deps="doc"
2501
2502 # default parameters
2503
2504 logfile="avbuild/config.log"
2505
2506 # installation paths
2507 prefix_default="/usr/local"
2508 bindir_default='${prefix}/bin'
2509 datadir_default='${prefix}/share/avconv'
2510 docdir_default='${prefix}/share/doc/libav'
2511 incdir_default='${prefix}/include'
2512 libdir_default='${prefix}/lib'
2513 mandir_default='${prefix}/share/man'
2514 shlibdir_default="$libdir_default"
2515
2516 # toolchain
2517 ar_default="ar"
2518 cc_default="gcc"
2519 host_cc_default="gcc"
2520 ln_s="ln -s -f"
2521 nm_default="nm -g"
2522 objformat="elf"
2523 pkg_config_default=pkg-config
2524 ranlib="ranlib"
2525 strip="strip"
2526 version_script='--version-script'
2527 yasmexe="yasm"
2528
2529 # machine
2530 arch_default=$(uname -m)
2531 cpu="generic"
2532 intrinsics="none"
2533
2534 # OS
2535 target_os_default=$(tolower $(uname -s))
2536 host_os=$target_os_default
2537
2538 # configurable options
2539 enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
2540
2541 enable asm
2542 enable debug
2543 enable doc
2544 enable faan faandct faanidct
2545 enable optimizations
2546 enable safe_bitstream_reader
2547 enable static
2548 enable swscale_alpha
2549 enable valgrind_backtrace
2550
2551 # By default, enable only those hwaccels that have no external dependencies.
2552 enable d3d11va dxva2 vda vdpau
2553
2554 # build settings
2555 SHFLAGS='-shared -Wl,-soname,$$(@F)'
2556 LIBPREF="lib"
2557 LIBSUF=".a"
2558 LIBNAME='$(LIBPREF)$(NAME)$(LIBSUF)'
2559 SLIBPREF="lib"
2560 SLIBSUF=".so"
2561 SLIBNAME='$(SLIBPREF)$(NAME)$(SLIBSUF)'
2562 SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
2563 SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
2564 LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
2565 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
2566 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
2567 VERSION_SCRIPT_POSTPROCESS_CMD="cat"
2568
2569 asflags_filter=echo
2570 cflags_filter=echo
2571 ldflags_filter=echo
2572
2573 AS_C='-c'
2574 AS_O='-o $@'
2575 CC_C='-c'
2576 CC_E='-E -o $@'
2577 CC_O='-o $@'
2578 OBJCC_C='-c'
2579 OBJCC_E='-E -o $@'
2580 OBJCC_O='-o $@'
2581 LD_O='-o $@'
2582 LD_LIB='-l%'
2583 LD_PATH='-L'
2584 HOSTCC_C='-c'
2585 HOSTCC_E='-E -o $@'
2586 HOSTCC_O='-o $@'
2587 HOSTLD_O='-o $@'
2588
2589 host_extralibs='-lm'
2590 host_cflags_filter=echo
2591 host_ldflags_filter=echo
2592
2593 target_path='$(CURDIR)'
2594
2595 # since the object filename is not given with the -MM flag, the compiler
2596 # is only able to print the basename, and we must add the path ourselves
2597 DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
2598 DEPFLAGS='-MM'
2599
2600 # find source path
2601 if test -f configure; then
2602     source_path=.
2603 else
2604     source_path=$(cd $(dirname "$0"); pwd)
2605     echo "$source_path" | grep -q '[[:blank:]]' &&
2606         die "Out of tree builds are impossible with whitespace in source path."
2607     test -e "$source_path/config.h" &&
2608         die "Out of tree builds are impossible with config.h in source dir."
2609 fi
2610
2611 for v in "$@"; do
2612     r=${v#*=}
2613     l=${v%"$r"}
2614     r=$(sh_quote "$r")
2615     LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
2616 done
2617
2618 find_things(){
2619     thing=$1
2620     pattern=$2
2621     file=$source_path/$3
2622     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
2623 }
2624
2625 ENCODER_LIST=$(find_things  encoder  ENC      libavcodec/allcodecs.c)
2626 DECODER_LIST=$(find_things  decoder  DEC      libavcodec/allcodecs.c)
2627 HWACCEL_LIST=$(find_things  hwaccel  HWACCEL  libavcodec/allcodecs.c)
2628 PARSER_LIST=$(find_things   parser   PARSER   libavcodec/allcodecs.c)
2629 MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
2630 DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
2631 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
2632 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
2633 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
2634
2635 find_things_extern(){
2636     thing=$1
2637     pattern=$2
2638     file=$source_path/$3
2639     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
2640 }
2641
2642 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
2643 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
2644
2645 ALL_COMPONENTS="
2646     $BSF_LIST
2647     $DECODER_LIST
2648     $DEMUXER_LIST
2649     $ENCODER_LIST
2650     $FILTER_LIST
2651     $HWACCEL_LIST
2652     $INDEV_LIST
2653     $MUXER_LIST
2654     $OUTDEV_LIST
2655     $PARSER_LIST
2656     $PROTOCOL_LIST
2657 "
2658
2659 for n in $COMPONENT_LIST; do
2660     v=$(toupper ${n%s})_LIST
2661     eval enable \$$v
2662     eval ${n}_if_any="\$$v"
2663 done
2664
2665 enable $ARCH_EXT_LIST
2666
2667 die_unknown(){
2668     echo "Unknown option \"$1\"."
2669     echo "See $0 --help for available options."
2670     exit 1
2671 }
2672
2673 print_3_columns() {
2674     printf "%-25s %-25s %-25s\n" $(cat | tr ' ' '\n' | sort)
2675 }
2676
2677 show_list() {
2678     suffix=_$1
2679     shift
2680     echo $* | sed s/$suffix//g | print_3_columns
2681     exit 0
2682 }
2683
2684 rand_list(){
2685     IFS=', '
2686     set -- $*
2687     unset IFS
2688     for thing; do
2689         comp=${thing%:*}
2690         prob=${thing#$comp}
2691         prob=${prob#:}
2692         is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
2693         echo "prob ${prob:-0.5}"
2694         printf '%s\n' $comp
2695     done
2696 }
2697
2698 do_random(){
2699     action=$1
2700     shift
2701     random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
2702     $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
2703 }
2704
2705 for opt do
2706     optval="${opt#*=}"
2707     case "$opt" in
2708         --extra-ldflags=*)
2709             add_ldflags $optval
2710         ;;
2711         --extra-ldexeflags=*)
2712             add_ldexeflags $optval
2713         ;;
2714         --extra-libs=*)
2715             add_extralibs $optval
2716         ;;
2717         --disable-devices)
2718             disable $INDEV_LIST $OUTDEV_LIST
2719         ;;
2720         --enable-debug=*)
2721             debuglevel="$optval"
2722         ;;
2723         --disable-programs)
2724             disable $PROGRAM_LIST
2725         ;;
2726         --disable-everything)
2727             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2728         ;;
2729         --disable-all)
2730             map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
2731             disable $LIBRARY_LIST $PROGRAM_LIST doc
2732         ;;
2733         --enable-random|--disable-random)
2734             action=${opt%%-random}
2735             do_random ${action#--} $COMPONENT_LIST
2736         ;;
2737         --enable-random=*|--disable-random=*)
2738             action=${opt%%-random=*}
2739             do_random ${action#--} $optval
2740         ;;
2741         --enable-*=*|--disable-*=*)
2742             eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
2743             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
2744             eval list=\$$(toupper $thing)_LIST
2745             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
2746             $action $(filter "$name" $list)
2747         ;;
2748         --enable-avserver|--disable-avserver*)
2749             warn "avserver has been removed, the ${opt} option is only"\
2750                  "provided for compatibility and will be removed in the future"
2751         ;;
2752         --enable-?*|--disable-?*)
2753             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
2754             if is_in $option $COMPONENT_LIST; then
2755                 test $action = disable && action=unset
2756                 eval $action \$$(toupper ${option%s})_LIST
2757             elif is_in $option $CMDLINE_SELECT; then
2758                 $action $option
2759             else
2760                 die_unknown $opt
2761             fi
2762         ;;
2763         --list-*)
2764             NAME="${opt#--list-}"
2765             is_in $NAME $COMPONENT_LIST || die_unknown $opt
2766             NAME=${NAME%s}
2767             eval show_list $NAME \$$(toupper $NAME)_LIST
2768         ;;
2769         --help|-h) show_help
2770         ;;
2771         --quiet|-q) quiet=yes
2772         ;;
2773         *)
2774             optname="${opt%%=*}"
2775             optname="${optname#--}"
2776             optname=$(echo "$optname" | sed 's/-/_/g')
2777             if is_in $optname $CMDLINE_SET; then
2778                 eval $optname='$optval'
2779             elif is_in $optname $CMDLINE_APPEND; then
2780                 append $optname "$optval"
2781             else
2782                 die_unknown $opt
2783             fi
2784         ;;
2785     esac
2786 done
2787
2788 for e in $env; do
2789     eval "export $e"
2790 done
2791
2792 disabled logging && logfile=/dev/null
2793
2794 # Die early if licensing-related configure options are incompatible.
2795 die_license_disabled() {
2796     enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
2797 }
2798
2799 map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
2800 map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
2801 map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
2802
2803 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
2804
2805 # Disable all the library-specific components if the library itself
2806 # is disabled, see AVCODEC_LIST and following _LIST variables.
2807
2808 disable_components(){
2809     disabled ${1} && disable $(
2810         eval components="\$$(toupper ${1})_COMPONENTS"
2811         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
2812     )
2813 }
2814
2815 map 'disable_components $v' $LIBRARY_LIST
2816
2817 mkdir -p avbuild
2818 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
2819 set >> $logfile
2820
2821 case "$toolchain" in
2822     *-asan)
2823         cc_default="${toolchain%-asan}"
2824         add_cflags  -fsanitize=address
2825         add_ldflags -fsanitize=address
2826     ;;
2827     *-msan)
2828         cc_default="${toolchain%-msan}"
2829         add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
2830         add_ldflags -fsanitize=memory
2831     ;;
2832     *-tsan)
2833         cc_default="${toolchain%-tsan}"
2834         add_cflags  -fsanitize=thread -fPIE
2835         add_ldflags -fsanitize=thread -pie
2836         case "$toolchain" in
2837             gcc-tsan)
2838                 add_cflags  -fPIC
2839                 add_ldflags -fPIC
2840                 ;;
2841         esac
2842     ;;
2843     *-usan)
2844         cc_default="${toolchain%-usan}"
2845         add_cflags  -fsanitize=undefined
2846         add_ldflags -fsanitize=undefined
2847         case "$toolchain" in
2848             clang-usan)
2849                 add_cflags -O1
2850                 ;;
2851         esac
2852     ;;
2853     valgrind-*)
2854         target_exec_default="valgrind"
2855         case "$toolchain" in
2856             valgrind-massif)
2857                 target_exec_args="--alloc-fn=av_malloc --alloc-fn=av_mallocz"
2858                 ;;
2859             valgrind-memcheck)
2860                 target_exec_args="--track-origins=yes --leak-check=full"
2861                 ;;
2862         esac
2863     ;;
2864     msvc)
2865         # Check whether the current MSVC version needs the C99 converter.
2866         # From MSVC 2013 (compiler major version 18) onwards, it does actually
2867         # support enough of C99 to build libav. Default to the new
2868         # behaviour if the regexp was unable to match anything, since this
2869         # successfully parses the version number of existing supported
2870         # versions that require the converter (MSVC 2010 and 2012).
2871         cl_major_ver=$(cl 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
2872         if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
2873             cc_default="cl"
2874         else
2875             cc_default="c99wrap cl"
2876         fi
2877         ld_default="$source_path/compat/windows/mslink"
2878         nm_default="dumpbin -symbols"
2879         ar_default="lib"
2880         case "$arch" in
2881         arm*)
2882             as_default="armasm"
2883             ;;
2884         esac
2885         target_os_default="win32"
2886         # Use a relative path for TMPDIR. This makes sure all the
2887         # ffconf temp files are written with a relative path, avoiding
2888         # issues with msys/win32 path conversion for MSVC parameters
2889         # such as -Fo<file> or -out:<file>.
2890         TMPDIR=.
2891     ;;
2892     icl)
2893         cc_default="icl"
2894         ld_default="xilink"
2895         nm_default="dumpbin -symbols"
2896         ar_default="xilib"
2897         target_os_default="win32"
2898         TMPDIR=.
2899     ;;
2900     gcov)
2901         add_cflags  -fprofile-arcs -ftest-coverage
2902         add_ldflags -fprofile-arcs -ftest-coverage
2903     ;;
2904     llvm-cov)
2905         add_cflags -fprofile-arcs -ftest-coverage
2906         add_ldflags --coverage
2907     ;;
2908     hardened)
2909         add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
2910         add_cflags   -fno-strict-overflow -fstack-protector-all
2911         add_ldflags  -Wl,-z,relro -Wl,-z,now
2912     ;;
2913     ?*)
2914         die "Unknown toolchain $toolchain"
2915     ;;
2916 esac
2917
2918 test -n "$cross_prefix" && enable cross_compile
2919
2920 if enabled cross_compile; then
2921     test -n "$arch" && test -n "$target_os" ||
2922         die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
2923 fi
2924
2925 ar_default="${cross_prefix}${ar_default}"
2926 cc_default="${cross_prefix}${cc_default}"
2927 occ_default="${cross_prefix}${occ_default}"
2928 nm_default="${cross_prefix}${nm_default}"
2929 pkg_config_default="${cross_prefix}${pkg_config_default}"
2930 ranlib="${cross_prefix}${ranlib}"
2931 strip="${cross_prefix}${strip}"
2932
2933 sysinclude_default="${sysroot}/usr/include"
2934
2935 set_default arch cc pkg_config sysinclude target_exec target_os
2936 enabled cross_compile || host_cc_default=$cc
2937 set_default host_cc
2938
2939 if ! $pkg_config --version >/dev/null 2>&1; then
2940     warn "$pkg_config not found, library detection may fail."
2941     pkg_config=false
2942 fi
2943
2944 exesuf() {
2945     case $1 in
2946         mingw32*|mingw64*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
2947     esac
2948 }
2949
2950 EXESUF=$(exesuf $target_os)
2951 HOSTEXESUF=$(exesuf $host_os)
2952
2953 # set temporary file name
2954 : ${TMPDIR:=$TEMPDIR}
2955 : ${TMPDIR:=$TMP}
2956 : ${TMPDIR:=/tmp}
2957
2958 if ! check_cmd mktemp -u XXXXXX; then
2959     # simple replacement for missing mktemp
2960     # NOT SAFE FOR GENERAL USE
2961     mktemp(){
2962         tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
2963         echo "$tmpname"
2964         mkdir "$tmpname"
2965     }
2966 fi
2967
2968 AVTMPDIR=$(mktemp -d "${TMPDIR}/avconf.XXXXXXXX" 2> /dev/null) ||
2969     die "Unable to create temporary directory in $TMPDIR."
2970
2971 tmpfile(){
2972     tmp="${AVTMPDIR}/test"$2
2973     (set -C; exec > $tmp) 2> /dev/null ||
2974         die "Unable to create temporary file in $AVTMPDIR."
2975     eval $1=$tmp
2976 }
2977
2978 trap 'rm -rf -- "$AVTMPDIR"' EXIT
2979 trap 'exit 2' INT
2980
2981 tmpfile TMPASM .asm
2982 tmpfile TMPC   .c
2983 tmpfile TMPE   $EXESUF
2984 tmpfile TMPH   .h
2985 tmpfile TMPO   .o
2986 tmpfile TMPS   .S
2987 tmpfile TMPSH  .sh
2988 tmpfile TMPV   .ver
2989
2990 unset -f mktemp
2991
2992 chmod +x $TMPE
2993
2994 # make sure we can execute files in $TMPDIR
2995 cat > $TMPSH 2>> $logfile <<EOF
2996 #! /bin/sh
2997 EOF
2998 chmod +x $TMPSH >> $logfile 2>&1
2999 if ! $TMPSH >> $logfile 2>&1; then
3000     cat <<EOF
3001 Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
3002 variable to another directory and make sure that it is not mounted noexec.
3003 EOF
3004     die "Sanity test failed."
3005 fi
3006
3007 armasm_flags(){
3008     for flag; do
3009         case $flag in
3010             # Filter out MSVC cl.exe options from cflags that shouldn't
3011             # be passed to gas-preprocessor
3012             -M[TD]*)                                            ;;
3013             *)                  echo $flag                      ;;
3014         esac
3015    done
3016 }
3017
3018 ccc_flags(){
3019     for flag; do
3020         case $flag in
3021             -std=c99)           echo -c99                       ;;
3022             -mcpu=*)            echo -arch ${flag#*=}           ;;
3023             -mieee)             echo -ieee                      ;;
3024             -O*|-fast)          echo $flag                      ;;
3025             -fno-math-errno)    echo -assume nomath_errno       ;;
3026             -g)                 echo -g3                        ;;
3027             -Wall)              echo -msg_enable level2         ;;
3028             -Wno-pointer-sign)  echo -msg_disable ptrmismatch1  ;;
3029             -Wl,*)              echo $flag                      ;;
3030             -f*|-W*)                                            ;;
3031             *)                  echo $flag                      ;;
3032         esac
3033    done
3034 }
3035
3036 cparser_flags(){
3037     for flag; do
3038         case $flag in
3039             -Wno-switch)             echo -Wno-switch-enum ;;
3040             -Wno-format-zero-length) ;;
3041             -Wdisabled-optimization) ;;
3042             -Wno-pointer-sign)       echo -Wno-other ;;
3043             *)                       echo $flag ;;
3044         esac
3045     done
3046 }
3047
3048 msvc_common_flags(){
3049     for flag; do
3050         case $flag in
3051             # In addition to specifying certain flags under the compiler
3052             # specific filters, they must be specified here as well or else the
3053             # generic catch all at the bottom will print the original flag.
3054             -Wall)                ;;
3055             -Wextra)              ;;
3056             -std=c99)             ;;
3057             # Common flags
3058             -fomit-frame-pointer) ;;
3059             -g)                   echo -Z7 ;;
3060             -fno-math-errno)      ;;
3061             -fno-common)          ;;
3062             -fno-signed-zeros)    ;;
3063             -fPIC)                ;;
3064             -mthumb)              ;;
3065             -march=*)             ;;
3066             -lz)                  echo zlib.lib ;;
3067             -lx264)               echo libx264.lib ;;
3068             -l*)                  echo ${flag#-l}.lib ;;
3069             -L*)                  echo -libpath:${flag#-L} ;;
3070             *)                    echo $flag ;;
3071         esac
3072     done
3073 }
3074
3075 msvc_flags(){
3076     msvc_common_flags "$@"
3077     for flag; do
3078         case $flag in
3079             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
3080                                        -wd4554 ;;
3081             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
3082                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
3083                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
3084                                        -wd4273 -wd4554 -wd4701 -wd4703 ;;
3085         esac
3086     done
3087 }
3088
3089 icl_flags(){
3090     msvc_common_flags "$@"
3091     for flag; do
3092         case $flag in
3093             # Despite what Intel's documentation says -Wall, which is supported
3094             # on Windows, does enable remarks so disable them here.
3095             -Wall)                echo $flag -Qdiag-disable:remark ;;
3096             -std=c99)             echo -Qstd=c99 ;;
3097         esac
3098     done
3099 }
3100
3101 pgi_flags(){
3102     for flag; do
3103         case $flag in
3104             -flto)                echo -Mipa=fast,libopt,libinline,vestigial ;;
3105             -fomit-frame-pointer) echo -Mnoframe ;;
3106             -g)                   echo -gopt ;;
3107             *)                    echo $flag ;;
3108         esac
3109     done
3110 }
3111
3112 suncc_flags(){
3113     for flag; do
3114         case $flag in
3115             -march=*|-mcpu=*)
3116                 case "${flag#*=}" in
3117                     native)                   echo -xtarget=native       ;;
3118                     v9|niagara)               echo -xarch=sparc          ;;
3119                     ultrasparc)               echo -xarch=sparcvis       ;;
3120                     ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
3121                     i586|pentium)             echo -xchip=pentium        ;;
3122                     i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
3123                     pentium3*|c3-2)           echo -xtarget=pentium3     ;;
3124                     pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
3125                     pentium4*)          echo -xtarget=pentium4           ;;
3126                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
3127                     *-sse3)             echo -xarch=sse3                 ;;
3128                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
3129                     corei7)           echo -xarch=sse4_2 -xchip=nehalem  ;;
3130                     corei7-avx)       echo -xarch=avx -xchip=sandybridge ;;
3131                     amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
3132                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
3133                     k8|opteron|athlon64|athlon-fx)
3134                                                echo -xarch=sse2a         ;;
3135                     athlon*)                   echo -xarch=pentium_proa  ;;
3136                 esac
3137                 ;;
3138             -std=c99)             echo -xc99              ;;
3139             -fomit-frame-pointer) echo -xregs=frameptr    ;;
3140             -fPIC)                echo -KPIC -xcode=pic32 ;;
3141             -W*,*)                echo $flag              ;;
3142             -f*-*|-W*|-mimpure-text)                      ;;
3143             -shared)              echo -G                 ;;
3144             *)                    echo $flag              ;;
3145         esac
3146     done
3147 }
3148
3149 tms470_flags(){
3150     for flag; do
3151         case $flag in
3152             -march=*|-mcpu=*)
3153                 case "${flag#*=}" in
3154                     armv7-a|cortex-a*)      echo -mv=7a8 ;;
3155                     armv7-r|cortex-r*)      echo -mv=7r4 ;;
3156                     armv7-m|cortex-m*)      echo -mv=7m3 ;;
3157                     armv6*|arm11*)          echo -mv=6   ;;
3158                     armv5*e|arm[79]*e*|arm9[24]6*|arm96*|arm102[26])
3159                                             echo -mv=5e  ;;
3160                     armv4*|arm7*|arm9[24]*) echo -mv=4   ;;
3161                 esac
3162                 ;;
3163             -mfpu=neon)     echo --float_support=vfpv3 --neon ;;
3164             -mfpu=vfp)      echo --float_support=vfpv2        ;;
3165             -mfpu=vfpv3)    echo --float_support=vfpv3        ;;
3166             -mfpu=vfpv3-d16) echo --float_support=vfpv3d16    ;;
3167             -msoft-float)   echo --float_support=vfplib       ;;
3168             -O[0-3]|-mf=*)  echo $flag                        ;;
3169             -g)             echo -g -mn                       ;;
3170             -pds=*)         echo $flag                        ;;
3171             -D*|-I*)        echo $flag                        ;;
3172             --gcc|--abi=*)  echo $flag                        ;;
3173             -me)            echo $flag                        ;;
3174         esac
3175     done
3176 }
3177
3178 probe_cc(){
3179     pfx=$1
3180     _cc=$2
3181
3182     unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
3183     unset _ld_o _ldflags _ld_lib _ld_path
3184     unset _depflags _DEPCMD _DEPFLAGS
3185     _flags_filter=echo
3186
3187     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
3188         _type=llvm_gcc
3189         gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
3190         _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
3191         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3192         _cflags_speed='-O3'
3193         _cflags_size='-Os'
3194     elif $_cc -v 2>&1 | grep -qi ^gcc; then
3195         _type=gcc
3196         gcc_version=$($_cc --version | head -n1)
3197         gcc_basever=$($_cc -dumpversion)
3198         gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
3199         gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
3200         _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
3201         if ! $_cc -dumpversion | grep -q '^2\.'; then
3202             _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3203         fi
3204         _cflags_speed='-O3'
3205         _cflags_size='-Os'
3206     elif $_cc --version 2>/dev/null | grep -q ^icc; then
3207         _type=icc
3208         _ident=$($_cc --version | head -n1)
3209         _depflags='-MMD'
3210         _cflags_speed='-O3'
3211         _cflags_size='-Os'
3212         _cflags_noopt='-O1'
3213     elif $_cc -v 2>&1 | grep -q xlc; then
3214         _type=xlc
3215         _ident=$($_cc -qversion 2>/dev/null | head -n1)
3216         _cflags_speed='-O5'
3217         _cflags_size='-O5 -qcompact'
3218     elif $_cc -V 2>/dev/null | grep -q Compaq; then
3219         _type=ccc
3220         _ident=$($_cc -V | head -n1 | cut -d' ' -f1-3)
3221         _DEPFLAGS='-M'
3222         _cflags_speed='-fast'
3223         _cflags_size='-O1'
3224         _flags_filter=ccc_flags
3225     elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
3226         test -d "$sysroot" || die "No valid sysroot specified."
3227         _type=armcc
3228         _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
3229         armcc_conf="$PWD/armcc.conf"
3230         $_cc --arm_linux_configure                 \
3231              --arm_linux_config_file="$armcc_conf" \
3232              --configure_sysroot="$sysroot"        \
3233              --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
3234              die "Error creating armcc configuration file."
3235         $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
3236         _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
3237         as_default="${cross_prefix}gcc"
3238         _depflags='-MMD'
3239         _cflags_speed='-O3'
3240         _cflags_size='-Os'
3241     elif $_cc -version 2>/dev/null | grep -Eq 'TMS470|TI ARM'; then
3242         _type=tms470
3243         _ident=$($_cc -version | head -n1 | tr -s ' ')
3244         _flags='--gcc --abi=eabi -me'
3245         _cc_e='-ppl -fe=$@'
3246         _cc_o='-fe=$@'
3247         _depflags='-ppa -ppd=$(@:.o=.d)'
3248         _cflags_speed='-O3 -mf=5'
3249         _cflags_size='-O3 -mf=2'
3250         _flags_filter=tms470_flags
3251     elif $_cc -v 2>&1 | grep -q clang; then
3252         _type=clang
3253         _ident=$($_cc --version 2>/dev/null | head -n1)
3254         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3255         _cflags_speed='-O3'
3256         _cflags_size='-Os'
3257     elif $_cc -V 2>&1 | grep -q Sun; then
3258         _type=suncc
3259         _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
3260         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
3261         _DEPFLAGS='-xM1 -xc99'
3262         _ldflags='-std=c99'
3263         _cflags_speed='-O5'
3264         _cflags_size='-O5 -xspace'
3265         _flags_filter=suncc_flags
3266     elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
3267         _type=pathscale
3268         _ident=$($_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'
3273     elif $_cc -v 2>&1 | grep -q Open64; then
3274         _type=open64
3275         _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
3276         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
3277         _cflags_speed='-O2'
3278         _cflags_size='-Os'
3279         _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
3280     elif $_cc -V 2>&1 | grep -q Portland; then
3281         _type=pgi
3282         _ident="PGI $($_cc -V 2>&1 | awk '/^pgcc/ { print $2; exit }')"
3283         opt_common='-alias=ansi -Mdse -Mlre -Mpre'
3284         _cflags_speed="-O3 -Mautoinline -Munroll=c:4 $opt_common"
3285         _cflags_size="-O2 -Munroll=c:1 $opt_common"
3286         _cflags_noopt="-O1"
3287         _flags_filter=pgi_flags
3288     elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
3289         _type=armasm
3290         _ident=$($_cc | head -n1)
3291         # 4509: "This form of conditional instruction is deprecated"
3292         _flags="-nologo -ignore 4509"
3293         _flags_filter=armasm_flags
3294     elif $_cc -nologo- 2>&1 | grep -q Microsoft; then
3295         _type=msvc
3296         _ident=$($_cc 2>&1 | head -n1)
3297         _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
3298         _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
3299         _cflags_speed="-O2"
3300         _cflags_size="-O1"
3301         _cflags_noopt="-O1"
3302         if $_cc -nologo- 2>&1 | grep -q Linker; then
3303             _ld_o='-out:$@'
3304         else
3305             _ld_o='-Fe$@'
3306         fi
3307         _cc_o='-Fo$@'
3308         _cc_e='-P -Fi$@'
3309         _flags_filter=msvc_flags
3310         _ld_lib='lib%.a'
3311         _ld_path='-libpath:'
3312         _flags='-nologo'
3313     elif $_cc 2>&1 | grep -q Intel; then
3314         _type=icl
3315         _ident=$($_cc 2>&1 | head -n1)
3316         _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
3317         # Not only is O3 broken on 13.x+ but it is slower on all previous
3318         # versions (tested) as well.
3319         _cflags_speed="-O2"
3320         _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
3321         if $_cc 2>&1 | grep -q Linker; then
3322             _ld_o='-out:$@'
3323         else
3324             _ld_o='-Fe$@'
3325         fi
3326         _cc_o='-Fo$@'
3327         _cc_e='-P'
3328         _flags_filter=icl_flags
3329         _ld_lib='lib%.a'
3330         _ld_path='-libpath:'
3331         # -Qdiag-error to make icl error when seeing certain unknown arguments
3332         _flags='-nologo -Qdiag-error:4044,10157'
3333         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency
3334         # with MSVC which enables it by default.
3335         _cflags='-Qms0 -Qvec- -Qsimd- -GS'
3336     elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
3337         # lld can emulate multiple different linkers; in ms link.exe mode,
3338         # the -? parameter gives the help output which contains an identifyable
3339         # string, while it gives an error in other modes.
3340         _type=lld-link
3341         # The link.exe mode doesn't have a switch for getting the version,
3342         # but we can force it back to gnu mode and get the version from there.
3343         _ident=$($_cc -flavor gnu --version 2>/dev/null)
3344         _ld_o='-out:$@'
3345         _flags_filter=msvc_flags
3346         _ld_lib='lib%.a'
3347         _ld_path='-libpath:'
3348     elif $_cc --version 2>/dev/null | grep -q ^cparser; then
3349         _type=cparser
3350         _ident=$($_cc --version | head -n1)
3351         _depflags='-MMD'
3352         _cflags_speed='-O4'
3353         _cflags_size='-O2'
3354         _flags_filter=cparser_flags
3355     fi
3356
3357     eval ${pfx}_type=\$_type
3358     eval ${pfx}_ident=\$_ident
3359 }
3360
3361 set_ccvars(){
3362     eval ${1}_C=\${_cc_c-\${${1}_C}}
3363     eval ${1}_E=\${_cc_e-\${${1}_E}}
3364     eval ${1}_O=\${_cc_o-\${${1}_O}}
3365
3366     if [ -n "$_depflags" ]; then
3367         eval ${1}_DEPFLAGS=\$_depflags
3368     else
3369         eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
3370         eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
3371         eval DEP${1}FLAGS=\$_flags
3372     fi
3373 }
3374
3375 probe_cc cc "$cc"
3376 cflags_filter=$_flags_filter
3377 cflags_speed=$_cflags_speed
3378 cflags_size=$_cflags_size
3379 cflags_noopt=$_cflags_noopt
3380 add_cflags $_flags $_cflags
3381 cc_ldflags=$_ldflags
3382 set_ccvars CC
3383
3384 probe_cc hostcc "$host_cc"
3385 host_cflags_filter=$_flags_filter
3386 host_cflags_speed=$_cflags_speed
3387 add_host_cflags  $_flags $_cflags
3388 set_ccvars HOSTCC
3389
3390 test -n "$cc_type" && enable $cc_type ||
3391     warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
3392
3393 : ${as_default:=$cc}
3394 : ${objcc_default:=$cc}
3395 : ${dep_cc_default:=$cc}
3396 : ${ld_default:=$cc}
3397 : ${host_ld_default:=$host_cc}
3398 set_default ar as objcc dep_cc ld host_ld
3399
3400 probe_cc as "$as"
3401 asflags_filter=$_flags_filter
3402 add_asflags $_flags $_cflags
3403 set_ccvars AS
3404
3405 probe_cc objcc "$objcc"
3406 objcflags_filter=$_flags_filter
3407 add_objcflags $_flags $_cflags
3408 set_ccvars OBJC
3409
3410 probe_cc ld "$ld"
3411 ldflags_filter=$_flags_filter
3412 add_ldflags $_flags $_ldflags
3413 test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
3414 LD_O=${_ld_o-$LD_O}
3415 LD_LIB=${_ld_lib-$LD_LIB}
3416 LD_PATH=${_ld_path-$LD_PATH}
3417
3418 probe_cc hostld "$host_ld"
3419 host_ldflags_filter=$_flags_filter
3420 add_host_ldflags $_flags $_ldflags
3421 HOSTLD_O=${_ld_o-$HOSTLD_O}
3422
3423 if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
3424     probe_cc depcc "$dep_cc"
3425     CCDEP=${_DEPCMD:-$DEPCMD}
3426     CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
3427     DEPCCFLAGS=$_flags
3428 fi
3429
3430 if $ar 2>&1 | grep -q Microsoft; then
3431     arflags="-nologo"
3432     ar_o='-out:$@'
3433 elif $ar 2>&1 | grep -q 'Texas Instruments'; then
3434     arflags="rq"
3435     ar_o='$@'
3436 elif $ar 2>&1 | grep -q 'Usage: ar.*-X.*any'; then
3437     arflags='-Xany -r -c'
3438     ar_o='$@'
3439 else
3440     arflags="rc"
3441     ar_o='$@'
3442 fi
3443
3444 add_cflags $extra_cflags
3445 add_objcflags $extra_objcflags
3446 add_asflags $extra_cflags
3447
3448 if test -n "$sysroot"; then
3449     case "$cc_type" in
3450         gcc|llvm_gcc|clang)
3451             add_cppflags --sysroot="$sysroot"
3452             add_ldflags --sysroot="$sysroot"
3453         ;;
3454         tms470)
3455             add_cppflags -I"$sysinclude"
3456             add_ldflags  --sysroot="$sysroot"
3457         ;;
3458     esac
3459 fi
3460
3461 if test "$cpu" = host; then
3462     enabled cross_compile &&
3463         die "--cpu=host makes no sense when cross-compiling."
3464
3465     case "$cc_type" in
3466         gcc|llvm_gcc)
3467             check_native(){
3468                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
3469                 sed -n "/cc1.*$1=/{
3470                             s/.*$1=\\([^ ]*\\).*/\\1/
3471                             p
3472                             q
3473                         }" $TMPE
3474             }
3475             cpu=$(check_native -march || check_native -mcpu)
3476         ;;
3477     esac
3478
3479     test "${cpu:-host}" = host &&
3480         die "--cpu=host not supported with compiler $cc"
3481 fi
3482
3483 # Deal with common $arch aliases
3484 case "$arch" in
3485     aarch64|arm64)
3486         arch="aarch64"
3487     ;;
3488     arm*)
3489         arch="arm"
3490     ;;
3491     mips*|IP*)
3492         case "$arch" in
3493         *el)
3494             add_cppflags -EL
3495             add_ldflags -EL
3496         ;;
3497         *eb)
3498             add_cppflags -EB
3499             add_ldflags -EB
3500         ;;
3501         esac
3502         arch="mips"
3503     ;;
3504     parisc*|hppa*)
3505         arch="parisc"
3506     ;;
3507     "Power Macintosh"|ppc*|powerpc*)
3508         arch="ppc"
3509     ;;
3510     s390|s390x)
3511         arch="s390"
3512     ;;
3513     sh4|sh)
3514         arch="sh4"
3515     ;;
3516     sun4u|sparc*)
3517         arch="sparc"
3518     ;;
3519     tilegx|tile-gx)
3520         arch="tilegx"
3521     ;;
3522     i[3-6]86|i86pc|BePC|x86pc|x86_64|amd64)
3523         arch="x86"
3524     ;;
3525 esac
3526
3527 is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
3528 enable $arch
3529
3530 # Add processor-specific flags
3531 if enabled aarch64; then
3532
3533     case $cpu in
3534         armv*)
3535             cpuflags="-march=$cpu"
3536         ;;
3537         *)
3538             cpuflags="-mcpu=$cpu"
3539         ;;
3540     esac
3541
3542 elif enabled alpha; then
3543
3544     cpuflags="-mcpu=$cpu"
3545
3546 elif enabled arm; then
3547
3548     check_arm_arch() {
3549         check_cpp_condition stddef.h \
3550             "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
3551             $cpuflags
3552     }
3553
3554     probe_arm_arch() {
3555         if   check_arm_arch 4;        then echo armv4
3556         elif check_arm_arch 4T;       then echo armv4t
3557         elif check_arm_arch 5;        then echo armv5
3558         elif check_arm_arch 5E;       then echo armv5e
3559         elif check_arm_arch 5T;       then echo armv5t
3560         elif check_arm_arch 5TE;      then echo armv5te
3561         elif check_arm_arch 5TEJ;     then echo armv5te
3562         elif check_arm_arch 6;        then echo armv6
3563         elif check_arm_arch 6J;       then echo armv6j
3564         elif check_arm_arch 6K;       then echo armv6k
3565         elif check_arm_arch 6Z;       then echo armv6z
3566         elif check_arm_arch 6ZK;      then echo armv6zk
3567         elif check_arm_arch 6T2;      then echo armv6t2
3568         elif check_arm_arch 7;        then echo armv7
3569         elif check_arm_arch 7A  7_A;  then echo armv7-a
3570         elif check_arm_arch 7S;       then echo armv7-a
3571         elif check_arm_arch 7R  7_R;  then echo armv7-r
3572         elif check_arm_arch 7M  7_M;  then echo armv7-m
3573         elif check_arm_arch 7EM 7E_M; then echo armv7-m
3574         elif check_arm_arch 8A  8_A;  then echo armv8-a
3575         fi
3576     }
3577
3578     [ "$cpu" = generic ] && cpu=$(probe_arm_arch)
3579
3580     case $cpu in
3581         armv*)
3582             cpuflags="-march=$cpu"
3583             subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
3584         ;;
3585         *)
3586             cpuflags="-mcpu=$cpu"
3587             case $cpu in
3588                 cortex-a*)                               subarch=armv7a  ;;
3589                 cortex-r*)                               subarch=armv7r  ;;
3590                 cortex-m*)                 enable thumb; subarch=armv7m  ;;
3591                 arm11*)                                  subarch=armv6   ;;
3592                 arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
3593                 armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
3594                 *)                             subarch=$(probe_arm_arch) ;;
3595             esac
3596         ;;
3597     esac
3598
3599     case "$subarch" in
3600         armv5t*)    enable fast_clz                ;;
3601         armv[6-8]*) enable fast_clz fast_unaligned ;;
3602     esac
3603
3604 elif enabled avr32; then
3605
3606     case $cpu in
3607         ap7[02]0[0-2])
3608             subarch="avr32_ap"
3609             cpuflags="-mpart=$cpu"
3610         ;;
3611         ap)
3612             subarch="avr32_ap"
3613             cpuflags="-march=$cpu"
3614         ;;
3615         uc3[ab]*)
3616             subarch="avr32_uc"
3617             cpuflags="-mcpu=$cpu"
3618         ;;
3619         uc)
3620             subarch="avr32_uc"
3621             cpuflags="-march=$cpu"
3622         ;;
3623     esac
3624
3625 elif enabled bfin; then
3626
3627     cpuflags="-mcpu=$cpu"
3628
3629 elif enabled mips; then
3630
3631     cpuflags="-march=$cpu"
3632
3633 elif enabled ppc; then
3634
3635     disable ldbrx
3636
3637     case $(tolower $cpu) in
3638         601|ppc601|powerpc601)
3639             cpuflags="-mcpu=601"
3640             disable altivec
3641         ;;
3642         603*|ppc603*|powerpc603*)
3643             cpuflags="-mcpu=603"
3644             disable altivec
3645         ;;
3646         604*|ppc604*|powerpc604*)
3647             cpuflags="-mcpu=604"
3648             disable altivec
3649         ;;
3650         g3|75*|ppc75*|powerpc75*)
3651             cpuflags="-mcpu=750"
3652             disable altivec
3653         ;;
3654         g4|745*|ppc745*|powerpc745*)
3655             cpuflags="-mcpu=7450"
3656             disable vsx
3657         ;;
3658         74*|ppc74*|powerpc74*)
3659             cpuflags="-mcpu=7400"
3660             disable vsx
3661         ;;
3662         g5|970|ppc970|powerpc970)
3663             cpuflags="-mcpu=970"
3664             disable vsx
3665         ;;
3666         power[3-6]*)
3667             cpuflags="-mcpu=$cpu"
3668             disable vsx
3669         ;;
3670         power[7-8]*)
3671             cpuflags="-mcpu=$cpu"
3672             enable ldbrx
3673         ;;
3674         cell)
3675             cpuflags="-mcpu=cell"
3676             enable ldbrx
3677             disable vsx
3678         ;;
3679         e500mc)
3680             cpuflags="-mcpu=e500mc"
3681             disable altivec
3682         ;;
3683         e500v2)
3684             cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
3685             disable altivec
3686             disable dcbzl
3687         ;;
3688         e500)
3689             cpuflags="-mcpu=8540 -mhard-float"
3690             disable altivec
3691             disable dcbzl
3692         ;;
3693     esac
3694
3695 elif enabled sparc; then
3696
3697     case $cpu in
3698         cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
3699             cpuflags="-mcpu=$cpu"
3700         ;;
3701         ultrasparc*|niagara[234])
3702             cpuflags="-mcpu=$cpu"
3703         ;;
3704     esac
3705
3706 elif enabled x86; then
3707
3708     case $cpu in
3709         i[345]86|pentium)
3710             cpuflags="-march=$cpu"
3711             disable i686
3712             disable mmx
3713         ;;
3714         # targets that do NOT support nopl and conditional mov (cmov)
3715         pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
3716             cpuflags="-march=$cpu"
3717             disable i686
3718         ;;
3719         # targets that do support nopl and conditional mov (cmov)
3720         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|corei7*|amdfam10|barcelona|atom|bdver*)
3721             cpuflags="-march=$cpu"
3722             enable i686
3723             enable fast_cmov
3724         ;;
3725         # targets that do support conditional mov but on which it's slow
3726         pentium4|pentium4m|prescott|nocona)
3727             cpuflags="-march=$cpu"
3728             enable i686
3729             disable fast_cmov
3730         ;;
3731     esac
3732
3733 fi
3734
3735 if [ "$cpu" != generic ]; then
3736     add_cflags  $cpuflags
3737     add_asflags $cpuflags
3738     test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
3739 fi
3740
3741 # compiler sanity check
3742 check_exec <<EOF
3743 int main(void){ return 0; }
3744 EOF
3745 if test "$?" != 0; then
3746     echo "$cc is unable to create an executable file."
3747     if test -z "$cross_prefix" && ! enabled cross_compile ; then
3748         echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
3749         echo "Only do this if you know what cross compiling means."
3750     fi
3751     die "C compiler test failed."
3752 fi
3753
3754 add_cppflags -D_ISOC99_SOURCE
3755
3756 # some compilers silently accept -std=c11, so we also need to check that the
3757 # version macro is defined properly
3758 if test_cflags_cpp -std=c11 "__STDC_VERSION__ >= 201112L"; then
3759     add_cflags -std=c11
3760 else
3761     check_cflags -std=c99
3762 fi
3763
3764 check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
3765 #include <stdlib.h>
3766 EOF
3767 check_cc -D_LARGEFILE_SOURCE <<EOF && add_cppflags -D_LARGEFILE_SOURCE
3768 #include <stdlib.h>
3769 EOF
3770
3771 add_host_cppflags -D_ISOC99_SOURCE
3772 check_host_cflags -std=c99
3773 check_host_cflags -Wall
3774 check_host_cflags $host_cflags_speed
3775
3776 check_64bit(){
3777     arch32=$1
3778     arch64=$2
3779     expr=$3
3780     check_code cc "" "int test[2*($expr) - 1]" &&
3781         subarch=$arch64 || subarch=$arch32
3782 }
3783
3784 case "$arch" in
3785     aarch64|alpha|ia64)
3786         spic=$shared
3787     ;;
3788     mips)
3789         check_64bit mips mips64 '_MIPS_SIM > 1'
3790         spic=$shared
3791     ;;
3792     parisc)
3793         check_64bit parisc parisc64 'sizeof(void *) > 4'
3794         spic=$shared
3795     ;;
3796     ppc)
3797         check_64bit ppc ppc64 'sizeof(void *) > 4'
3798         spic=$shared
3799     ;;
3800     s390)
3801         check_64bit s390 s390x 'sizeof(void *) > 4'
3802         spic=$shared
3803     ;;
3804     sparc)
3805         check_64bit sparc sparc64 'sizeof(void *) > 4'
3806         spic=$shared
3807     ;;
3808     x86)
3809         check_64bit x86_32 x86_64 'sizeof(void *) > 4'
3810         if test "$subarch" = "x86_64"; then
3811             spic=$shared
3812         fi
3813     ;;
3814 esac
3815
3816 enable $subarch
3817 enabled spic && enable_weak pic
3818
3819 # OS specific
3820 case $target_os in
3821     aix)
3822         SHFLAGS=-shared
3823         add_cppflags '-I\$(SRC_PATH)/compat/aix'
3824         enabled shared && add_ldflags -Wl,-brtl
3825         ;;
3826     android)
3827         disable symver
3828         enable section_data_rel_ro
3829         SLIB_INSTALL_NAME='$(SLIBNAME)'
3830         SLIB_INSTALL_LINKS=
3831         SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
3832         ;;
3833     haiku)
3834         prefix_default="/boot/common"
3835         network_extralibs="-lnetwork"
3836         host_extralibs=
3837         ;;
3838     sunos)
3839         SHFLAGS='-shared -Wl,-h,$$(@F)'
3840         enabled x86 && SHFLAGS="-mimpure-text $SHFLAGS"
3841         network_extralibs="-lsocket -lnsl"
3842         # When using suncc to build, the Solaris linker will mark
3843         # an executable with each instruction set encountered by
3844         # the Solaris assembler.  As our libraries contain their own
3845         # guards for processor-specific code, instead suppress
3846         # generation of the HWCAPS ELF section on Solaris x86 only.
3847         enabled_all suncc x86 &&
3848             echo "hwcap_1 = OVERRIDE;" > mapfile &&
3849             add_ldflags -Wl,-M,mapfile
3850         nm_default='nm -P -g'
3851         version_script='-M'
3852         VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
3853         ;;
3854     netbsd)
3855         disable symver
3856         oss_indev_extralibs="-lossaudio"
3857         oss_outdev_extralibs="-lossaudio"
3858         ;;
3859     openbsd|bitrig)
3860         disable symver
3861         SHFLAGS='-shared'
3862         SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
3863         SLIB_INSTALL_LINKS=
3864         oss_indev_extralibs="-lossaudio"
3865         oss_outdev_extralibs="-lossaudio"
3866         ;;
3867     dragonfly)
3868         disable symver
3869         ;;
3870     freebsd)
3871         ;;
3872     bsd/os)
3873         add_extralibs -lpoll -lgnugetopt
3874         ;;
3875     darwin)
3876         enabled ppc && add_asflags -force_cpusubtype_ALL
3877         SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
3878         enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
3879         add_ldflags -Wl,-dynamic,-search_paths_first
3880         SLIBSUF=".dylib"
3881         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
3882         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
3883         objformat="macho"
3884         enabled x86_64 && objformat="macho64"
3885         enabled_any pic shared ||
3886             { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
3887         check_header dispatch/dispatch.h &&
3888             add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
3889         ;;
3890     msys*)
3891         die "Native MSYS builds are discouraged, please use the MINGW environment."
3892         ;;
3893     mingw32*|mingw64*)
3894         if test $target_os = "mingw32ce"; then
3895             disable network
3896         else
3897             target_os=mingw32
3898         fi
3899         LIBTARGET=i386
3900         if enabled x86_64; then
3901             LIBTARGET="i386:x86-64"
3902         elif enabled arm; then
3903             LIBTARGET=arm-wince
3904         fi
3905         check_ldflags -Wl,--nxcompat
3906         check_ldflags -Wl,--dynamicbase
3907         shlibdir_default="$bindir_default"
3908         SLIBPREF=""
3909         SLIBSUF=".dll"
3910         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3911         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3912         SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
3913         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3914         SLIB_INSTALL_LINKS=
3915         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3916         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3917         SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
3918         objformat="win32"
3919         dlltool="${cross_prefix}dlltool"
3920         ranlib=:
3921         enable dos_paths
3922         ;;
3923     win32|win64)
3924         disable symver
3925         if enabled shared; then
3926             # Link to the import library instead of the normal static library
3927             # for shared libs.
3928             LD_LIB='%.lib'
3929             # Cannot build both shared and static libs with MSVC or icl.
3930             disable static
3931         fi
3932         shlibdir_default="$bindir_default"
3933         SLIBPREF=""
3934         SLIBSUF=".dll"
3935         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3936         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3937         SLIB_CREATE_DEF_CMD='$(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
3938         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3939         SLIB_INSTALL_LINKS=
3940         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
3941         SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
3942         SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
3943         objformat="win32"
3944         ranlib=:
3945         enable dos_paths
3946         ;;
3947     cygwin*)
3948         target_os=cygwin
3949         shlibdir_default="$bindir_default"
3950         SLIBPREF="cyg"
3951         SLIBSUF=".dll"
3952         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3953         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
3954         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
3955         SLIB_INSTALL_LINKS=
3956         SLIB_INSTALL_EXTRA_LIB='lib$(NAME).dll.a'
3957         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(NAME).dll.a'
3958         objformat="win32"
3959         enable dos_paths
3960         ;;
3961     *-dos|freedos|opendos)
3962         network_extralibs="-lsocket"
3963         objformat="coff"
3964         enable dos_paths
3965         add_cppflags -U__STRICT_ANSI__
3966         ;;
3967     linux)
3968         enable dv1394
3969         enable section_data_rel_ro
3970         ;;
3971     irix*)
3972         target_os=irix
3973         ranlib="echo ignoring ranlib"
3974         ;;
3975     os/2*)
3976         ln_s="cp -f"
3977         objformat="aout"
3978         add_cppflags -D_GNU_SOURCE
3979         add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
3980         SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
3981         LIBSUF="_s.a"
3982         SLIBPREF=""
3983         SLIBSUF=".dll"
3984         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
3985         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(NAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
3986         SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(NAME).def; \
3987             echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(NAME).def; \
3988             echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(NAME).def; \
3989             echo EXPORTS >> $(SUBDIR)$(NAME).def; \
3990             emxexp $(OBJS) >> $(SUBDIR)$(NAME).def'
3991         SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.a $(SUBDIR)$(NAME).def; \
3992             emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
3993         SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
3994         enable dos_paths
3995         ;;
3996     gnu/kfreebsd)
3997         add_cppflags -D_BSD_SOURCE
3998         ;;
3999     gnu)
4000         ;;
4001     qnx)
4002         add_cppflags -D_QNX_SOURCE
4003         network_extralibs="-lsocket"
4004         ;;
4005     symbian)
4006         SLIBSUF=".dll"
4007         enable dos_paths
4008         add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
4009         add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
4010         add_ldflags -Wl,--target1-abs,--no-undefined \
4011                     -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
4012                     -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
4013         add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
4014                       -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
4015                       -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
4016         ;;
4017     osf1)
4018         add_cppflags -D_OSF_SOURCE -D_POSIX_PII -D_REENTRANT
4019         ;;
4020     minix)
4021         ;;
4022     none)
4023         ;;
4024     *)
4025         die "Unknown OS '$target_os'."
4026         ;;
4027 esac
4028
4029 # determine libc flavour
4030
4031 probe_libc(){
4032     pfx=$1
4033     pfx_no_=${pfx%_}
4034     # uclibc defines __GLIBC__, so it needs to be checked before glibc.
4035     if check_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
4036         eval ${pfx}libc_type=uclibc
4037         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4038     elif check_${pfx}cpp_condition features.h "defined __GLIBC__"; then
4039         eval ${pfx}libc_type=glibc
4040         add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
4041     # MinGW headers can be installed on Cygwin, so check for newlib first.
4042     elif check_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
4043         eval ${pfx}libc_type=newlib
4044         add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
4045     # MinGW64 is backwards compatible with MinGW32, so check for it first.
4046     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
4047         eval ${pfx}libc_type=mingw64
4048         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4049         eval test \$${pfx_no_}cc_type = "gcc" &&
4050             add_${pfx}cppflags -D__printf__=__gnu_printf__
4051     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
4052          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
4053         eval ${pfx}libc_type=mingw32
4054         check_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
4055             (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
4056             die "ERROR: MinGW32 runtime version must be >= 3.15."
4057         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
4058         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700__" &&
4059             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
4060         eval test \$${pfx_no_}cc_type = "gcc" &&
4061             add_${pfx}cppflags -D__printf__=__gnu_printf__
4062     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
4063         eval ${pfx}libc_type=msvcrt
4064         if check_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
4065             if [ "$pfx" = host_ ]; then
4066                 add_host_cppflags -Dsnprintf=_snprintf
4067             else
4068                 add_compat strtod.o strtod=avpriv_strtod
4069                 add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
4070                                              _snprintf=avpriv_snprintf  \
4071                                              vsnprintf=avpriv_vsnprintf
4072             fi
4073         fi
4074         add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
4075         # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
4076         # 0x601 by default unless something else is set by the user.
4077         # This can easily lead to us detecting functions only present
4078         # in such new versions and producing binaries requiring windows 7.0.
4079         # Therefore explicitly set the default to XP unless the user has
4080         # set something else on the command line.
4081         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
4082         # family. For these cases, configure is free to use any functions
4083         # found in the SDK headers by default. (Alternatively, we could force
4084         # _WIN32_WINNT to 0x0602 in that case.)
4085         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
4086             { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
4087 #ifdef WINAPI_FAMILY
4088 #include <winapifamily.h>
4089 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
4090 #error not desktop
4091 #endif
4092 #endif
4093 EOF
4094         if [ "$pfx" = "" ]; then
4095             check_func strtoll || add_cflags -Dstrtoll=_strtoi64
4096         fi
4097     elif check_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
4098         eval ${pfx}libc_type=klibc
4099     elif check_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
4100         eval ${pfx}libc_type=bionic
4101     elif check_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
4102         eval ${pfx}libc_type=solaris
4103         add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
4104     else
4105         eval ${pfx}libc_type=default
4106         add_${pfx}cppflags -D_DEFAULT_SOURCE
4107     fi
4108 }
4109
4110 probe_libc
4111 test -n "$libc_type" && enable libc_$libc_type
4112 probe_libc host_
4113 test -n "$host_libc_type" && enable host_libc_$host_libc_type
4114
4115 case $libc_type in
4116     bionic)
4117         add_compat strtod.o strtod=avpriv_strtod
4118         ;;
4119 esac
4120
4121 # hacks for compiler/libc/os combinations
4122
4123 if enabled_all tms470 libc_glibc; then
4124     CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
4125     add_cppflags -D__USER_LABEL_PREFIX__=
4126     add_cppflags -D__builtin_memset=memset
4127     add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
4128     add_cflags   -pds=48    # incompatible redefinition of macro
4129 fi
4130
4131 if enabled_all ccc libc_glibc; then
4132     add_ldflags -Wl,-z,now  # calls to libots crash without this
4133 fi
4134
4135 check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
4136     add_cppflags '-I\$(SRC_PATH)/compat/float'
4137
4138 esc(){
4139     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
4140 }
4141
4142 echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $LIBAV_CONFIGURATION)" > avbuild/config.fate
4143
4144 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
4145
4146 set_default $PATHS_LIST
4147 set_default nm
4148
4149 # we need to build at least one lib type
4150 if ! enabled_any static shared; then
4151     cat <<EOF
4152 At least one library type must be built.
4153 Specify --enable-static to build the static libraries or --enable-shared to
4154 build the shared libraries as well. To only build the shared libraries specify
4155 --disable-static in addition to --enable-shared.
4156 EOF
4157     exit 1
4158 fi
4159
4160 disabled optimizations || check_cflags -fomit-frame-pointer
4161
4162 enable_weak_pic() {
4163     disabled pic && return
4164     enable pic
4165     add_cppflags -DPIC
4166     case "$target_os" in
4167     mingw*|cygwin*)
4168         ;;
4169     *)
4170         add_cflags -fPIC
4171         ;;
4172     esac
4173     add_asflags  -fPIC
4174 }
4175
4176 enabled pic && enable_weak_pic
4177
4178 check_cc <<EOF || die "Symbol mangling check failed."
4179 int ff_extern;
4180 EOF
4181 sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
4182 extern_prefix=${sym%%ff_extern*}
4183
4184 check_cc <<EOF && enable_weak inline_asm
4185 void foo(void) { __asm__ volatile ("" ::); }
4186 EOF
4187
4188 _restrict=
4189 for restrict_keyword in restrict __restrict__ __restrict; do
4190     check_cc <<EOF && _restrict=$restrict_keyword && break
4191 void foo(char * $restrict_keyword p);
4192 EOF
4193 done
4194
4195 check_cc <<EOF && enable pragma_deprecated
4196 void foo(void) { _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") }
4197 EOF
4198
4199 check_cc <<EOF && enable attribute_packed
4200 struct { int x; } __attribute__((packed)) x;
4201 EOF
4202
4203 check_cc <<EOF && enable attribute_may_alias
4204 union { int x; } __attribute__((may_alias)) x;
4205 EOF
4206
4207 check_cc <<EOF || die "endian test failed"
4208 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
4209 EOF
4210 od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
4211
4212 check_gas() {
4213     log "check_gas using '$as' as AS"
4214     # :vararg is used on aarch64, arm and ppc altivec
4215     check_as <<EOF || return 1
4216 .macro m n, y:vararg=0
4217 \n: .int \y
4218 .endm
4219 m x
4220 EOF
4221     # .altmacro is only used in arm asm
4222     ! enabled arm || check_as <<EOF || return 1
4223 .altmacro
4224 EOF
4225     enable gnu_as
4226     return 0
4227 }
4228
4229 if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
4230     nogas=:
4231     enabled_any arm aarch64 && nogas=die
4232     enabled_all ppc altivec && nogas=warn
4233     as_noop=-v
4234
4235     case $as_type in
4236         arm*) gaspp_as_type=armasm; as_noop=-h ;;
4237         gcc)  gaspp_as_type=gas ;;
4238         *)    gaspp_as_type=$as_type ;;
4239     esac
4240
4241     [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
4242
4243     check_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as $as_noop &&
4244         gas="gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- $as"
4245
4246     if ! check_gas ; then
4247         as=${gas:=$as}
4248         check_gas || \
4249             $nogas "GNU assembler not found, install/update gas-preprocessor"
4250     fi
4251
4252     check_as <<EOF && enable as_func
4253 .func test
4254 .endfunc
4255 EOF
4256 fi
4257
4258 check_inline_asm inline_asm_labels '"1:\n"'
4259
4260 if enabled aarch64; then
4261     enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
4262     # internal assembler in clang 3.3 does not support this instruction
4263     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
4264     enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
4265
4266     map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
4267
4268 elif enabled alpha; then
4269
4270     check_cflags -mieee
4271
4272 elif enabled arm; then
4273
4274     enabled msvc && check_cpp_condition stddef.h "defined _M_ARMT" && enable thumb
4275     check_cpp_condition stddef.h "defined __thumb__" && enable_weak thumb
4276     enabled thumb && check_cflags -mthumb || check_cflags -marm
4277
4278     if     check_cpp_condition stddef.h "defined __ARM_PCS_VFP"; then
4279         enable vfp_args
4280     elif check_cpp_condition stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
4281         enable vfp_args
4282     elif ! check_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
4283         case "${cross_prefix:-$cc}" in
4284             *hardfloat*)         enable vfp_args;   fpabi=vfp ;;
4285             *) check_ld <<EOF && enable vfp_args && fpabi=vfp || fpabi=soft ;;
4286 __asm__ (".eabi_attribute 28, 1");
4287 int main(void) { return 0; }
4288 EOF
4289         esac
4290         warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
4291     fi
4292
4293     enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
4294     enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
4295     enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
4296     enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
4297     enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
4298     enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
4299
4300     [ $target_os = linux ] || [ $target_os = android ] ||
4301         map 'enabled_any ${v}_external ${v}_inline || disable $v' \
4302             $ARCH_EXT_LIST_ARM
4303
4304     check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
4305
4306     check_as <<EOF && enable as_dn_directive
4307 ra .dn d0.i16
4308 .unreq ra
4309 EOF
4310     check_as <<EOF && enable as_fpu_directive
4311 .fpu neon
4312 EOF
4313
4314     # llvm's integrated assembler supports .object_arch from llvm 3.5
4315     [ "$objformat" = elf ] && check_as <<EOF && enable as_object_arch
4316 .object_arch armv4
4317 EOF
4318
4319     [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
4320
4321 elif enabled mips; then
4322
4323     check_inline_asm loongson '"dmult.g $1, $2, $3"'
4324
4325     # make sure that only an instruction set is enabled
4326     disable mips64r6 mips32r6 mips64r2 mips32r2 mips64r1 mips32r1
4327
4328     if enabled mips64; then
4329         check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' ||
4330             check_inline_asm mips64r2 '"dext $0, $0, 0, 1"' ||
4331                 check_inline_asm mips64r1 '"daddi $0, $0, 0"'
4332     else
4333         check_inline_asm mips32r6 '"aui $0, $0, 0"' ||
4334             check_inline_asm mips32r2 '"ext $0, $0, 0, 1"' ||
4335                 check_inline_asm mips32r1 '"addi $0, $0, 0"'
4336     fi
4337
4338 elif enabled parisc; then
4339
4340     if enabled gcc; then
4341         case $($cc -dumpversion) in
4342             4.[3-8].*) check_cflags -fno-optimize-sibling-calls ;;
4343         esac
4344     fi
4345
4346 elif enabled ppc; then
4347
4348     enable local_aligned_8 local_aligned_16 local_aligned_32
4349
4350     check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
4351     check_inline_asm ibm_asm   '"add 0, 0, 0"'
4352     check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
4353     check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
4354
4355     # AltiVec flags: The FSF version of GCC differs from the Apple version
4356     if enabled altivec; then
4357         check_cflags -maltivec -mabi=altivec &&
4358         { check_header altivec.h && inc_altivec_h="#include <altivec.h>" ; } ||
4359         check_cflags -faltivec
4360
4361         # check if our compiler supports Motorola AltiVec C API
4362         check_cc <<EOF || disable altivec
4363 $inc_altivec_h
4364 int main(void) {
4365     vector signed int v1 = (vector signed int) { 0 };
4366     vector signed int v2 = (vector signed int) { 1 };
4367     v1 = vec_add(v1, v2);
4368     return 0;
4369 }
4370 EOF
4371
4372         enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
4373     fi
4374
4375     if enabled vsx; then
4376         check_cflags -mvsx &&
4377         check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
4378     fi
4379
4380     if enabled power8; then
4381         check_cpp_condition "altivec.h" "defined(_ARCH_PWR8)" || disable power8
4382     fi
4383
4384 elif enabled x86; then
4385
4386     check_builtin rdtsc    intrin.h   "__rdtsc()"
4387     check_builtin mm_empty mmintrin.h "_mm_empty()"
4388
4389     enable local_aligned_8 local_aligned_16 local_aligned_32
4390
4391     # check whether EBP is available on x86
4392     # As 'i' is stored on the stack, this program will crash
4393     # if the base pointer is used to access it because the
4394     # base pointer is cleared in the inline assembly code.
4395     check_exec_crash <<EOF && enable ebp_available
4396 volatile int i=0;
4397 __asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
4398 return i;
4399 EOF
4400
4401     # check whether EBX is available on x86
4402     check_inline_asm ebx_available '""::"b"(0)' &&
4403         check_inline_asm ebx_available '"":::"%ebx"'
4404
4405     # check whether xmm clobbers are supported
4406     check_inline_asm xmm_clobbers '"":::"%xmm0"'
4407
4408     # check whether binutils is new enough to compile SSSE3/MMXEXT
4409     enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
4410     enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
4411
4412     if ! disabled_any asm mmx yasm; then
4413         if check_cmd $yasmexe --version; then
4414             enabled x86_64 && yasm_extra="-m amd64"
4415             yasm_debug="-g dwarf2"
4416         elif check_cmd nasm -v; then
4417             yasmexe=nasm
4418             yasm_debug="-g -F dwarf"
4419             enabled x86_64 && test "$objformat" = elf && objformat=elf64
4420         fi
4421
4422         YASMFLAGS="-f $objformat $yasm_extra"
4423         enabled pic               && append YASMFLAGS "-DPIC"
4424         test -n "$extern_prefix"  && append YASMFLAGS "-DPREFIX"
4425         case "$objformat" in
4426             elf*) enabled debug && append YASMFLAGS $yasm_debug ;;
4427         esac
4428
4429         check_yasm "movbe ecx, [5]" && enable yasm ||
4430             die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
4431         check_yasm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
4432         check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
4433         check_yasm "vfmadd132ps ymm0, ymm1, ymm2"    || disable fma3_external
4434         check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
4435         check_yasm "CPU amdnop" || disable cpunop
4436     fi
4437
4438     case "$cpu" in
4439         athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
4440             disable fast_clz
4441         ;;
4442     esac
4443
4444 fi
4445
4446 check_code cc arm_neon.h "int16x8_t test = vdupq_n_s16(0)" && enable intrinsics_neon
4447
4448 check_ldflags -Wl,--as-needed
4449
4450 if check_func dlopen; then
4451     ldl=
4452 elif check_func dlopen -ldl; then
4453     ldl=-ldl
4454 fi
4455
4456 if ! disabled network; then
4457     check_func getaddrinfo $network_extralibs
4458     check_func inet_aton $network_extralibs
4459
4460     check_type netdb.h "struct addrinfo"
4461     check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
4462     check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
4463     check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
4464     check_type poll.h "struct pollfd"
4465     check_type netinet/sctp.h "struct sctp_event_subscribe"
4466     check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
4467     check_type netinet/in.h "struct sockaddr_in6"
4468     check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
4469     check_type "sys/types.h sys/socket.h" socklen_t
4470
4471     # Prefer arpa/inet.h over winsock2
4472     if check_header arpa/inet.h ; then
4473         check_func closesocket
4474     elif check_header winsock2.h ; then
4475         check_func_headers winsock2.h closesocket -lws2 &&
4476             network_extralibs="-lws2" ||
4477         { check_func_headers winsock2.h closesocket -lws2_32 &&
4478             network_extralibs="-lws2_32"; } || disable winsock2_h network
4479         check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
4480
4481         check_type ws2tcpip.h socklen_t
4482         check_type ws2tcpip.h "struct addrinfo"
4483         check_type ws2tcpip.h "struct group_source_req"
4484         check_type ws2tcpip.h "struct ip_mreq_source"
4485         check_type ws2tcpip.h "struct ipv6_mreq"
4486         check_type winsock2.h "struct pollfd"
4487         check_struct winsock2.h "struct sockaddr" sa_len
4488         check_type ws2tcpip.h "struct sockaddr_in6"
4489         check_type ws2tcpip.h "struct sockaddr_storage"
4490     else
4491         disable network
4492     fi
4493 fi
4494
4495 check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
4496 check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
4497 check_builtin MemoryBarrier windows.h "MemoryBarrier()"
4498 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
4499
4500 case "$custom_allocator" in
4501     jemalloc)
4502         # jemalloc by default does not use a prefix
4503         require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
4504     ;;
4505     tcmalloc)
4506         require_pkg_config libtcmalloc gperftools/tcmalloc.h tc_malloc
4507         malloc_prefix=tc_
4508     ;;
4509 esac
4510
4511 check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
4512 check_func  ${malloc_prefix}memalign            && enable memalign
4513 check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
4514
4515 check_cpp_condition unistd.h "defined(_POSIX_MONOTONIC_CLOCK)" &&
4516     check_func_headers time.h clock_gettime ||
4517         { check_lib clock_gettime time.h clock_gettime -lrt && LIBRT="-lrt"; }
4518
4519 check_func  fcntl
4520 check_func  fork
4521 check_func  gethrtime
4522 check_func  getopt
4523 check_func  getrusage
4524 check_func  gettimeofday
4525 check_func  gmtime_r
4526 check_func  isatty
4527 check_func  localtime_r
4528 check_func  mach_absolute_time
4529 check_func  mkstemp
4530 check_func  mmap
4531 check_func  mprotect
4532 # Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
4533 check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
4534 check_func  sched_getaffinity
4535 check_func  setrlimit
4536 check_func  strerror_r
4537 check_func  sysconf
4538 check_func  sysctl
4539 check_func  usleep
4540
4541 check_func_headers io.h setmode
4542 check_func_headers stdlib.h getenv
4543
4544 check_func_headers windows.h GetProcessAffinityMask
4545 check_func_headers windows.h GetProcessTimes
4546 check_func_headers windows.h GetSystemTimeAsFileTime
4547 check_func_headers windows.h LoadLibrary
4548 check_func_headers windows.h MapViewOfFile
4549 check_func_headers windows.h SetConsoleTextAttribute
4550 check_func_headers windows.h Sleep
4551 check_func_headers windows.h VirtualAlloc
4552 check_struct windows.h "CONDITION_VARIABLE" Ptr
4553
4554 check_header d3d11.h
4555 check_header direct.h
4556 check_header dlfcn.h
4557 check_header dxva.h
4558 check_header dxva2api.h
4559 check_header io.h
4560 check_header mach/mach_time.h
4561 check_header malloc.h
4562 check_header poll.h
4563 check_header sys/mman.h
4564 check_header sys/param.h
4565 check_header sys/resource.h
4566 check_header sys/select.h
4567 check_header sys/time.h
4568 check_header sys/un.h
4569 check_header unistd.h
4570 check_header valgrind/valgrind.h
4571 check_header VideoDecodeAcceleration/VDADecoder.h
4572 check_header windows.h
4573 check_header X11/extensions/XvMClib.h
4574
4575 # it seems there are versions of clang in some distros that try to use the
4576 # gcc headers, which explodes for stdatomic
4577 # so we also check that atomics actually work here
4578 check_builtin stdatomic_h stdatomic.h "atomic_int foo; atomic_store(&foo, 0)"
4579
4580 check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
4581 check_lib wincrypt "windows.h wincrypt.h" CryptGenRandom       -ladvapi32
4582 check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
4583
4584 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
4585
4586 check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
4587 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
4588 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
4589
4590 check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
4591 check_type "va/va.h va/va_dec_vp8.h" "VAPictureParameterBufferVP8"
4592 check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
4593 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
4594 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
4595 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
4596 check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
4597
4598 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
4599
4600 if ! disabled w32threads && ! enabled pthreads; then
4601     check_lib w32threads "windows.h process.h" _beginthreadex
4602 fi
4603
4604 # check for some common methods of building with pthread support
4605 # do this before the optional library checks as some of them require pthreads
4606 if ! disabled pthreads && ! enabled w32threads; then
4607     if check_lib pthreads pthread.h pthread_join -pthread; then
4608         add_cflags -pthread
4609     elif check_lib pthreads pthread.h pthread_join -pthreads; then
4610         add_cflags -pthreads
4611     elif check_lib pthreads pthread.h pthread_join -lpthreadGC2; then
4612         :
4613     elif check_lib pthreads pthread.h pthread_join -lpthread; then
4614         :
4615     elif check_func pthread_join; then
4616         enable pthreads
4617     fi
4618 fi
4619
4620 enabled pthreads &&
4621     check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)"
4622
4623 disabled  zlib || check_lib  zlib  zlib.h      zlibVersion -lz
4624 disabled bzlib || check_lib bzlib bzlib.h BZ2_bzlibVersion -lbz2
4625
4626 check_lib libm math.h sin -lm && LIBM="-lm"
4627
4628 atan2f_args=2
4629 ldexpf_args=2
4630 powf_args=2
4631
4632 for func in $MATH_FUNCS; do
4633     eval check_mathfunc $func \${${func}_args:-1} $LIBM
4634 done
4635
4636 # these are off by default, so fail if requested and not available
4637 enabled avisynth          && { check_header avisynth/avisynth_c.h || die "ERROR: avisynth/avisynth_c.h header not found"; }
4638 enabled avxsynth          && require avxsynth "avxsynth/avxsynth_c.h dlfcn.h" dlopen -ldl
4639 enabled cuda              && require cuda cuda.h cuInit -lcuda
4640 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
4641 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
4642 enabled libbs2b           && require_pkg_config libbs2b bs2b.h bs2b_open
4643 enabled libdc1394         && require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new
4644 enabled libdcadec         && require libdcadec libdcadec/dca_context.h dcadec_context_create -ldcadec
4645 enabled libfaac           && require libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
4646 enabled libfdk_aac        && require_pkg_config fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen
4647 enabled libfontconfig     && require_pkg_config fontconfig "fontconfig/fontconfig.h" FcInit
4648 enabled libfreetype       && require_pkg_config freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
4649 enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
4650                                    check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
4651                                done || die "ERROR: libgsm not found"; }
4652 enabled libhdcd           && require_pkg_config libhdcd "hdcd/hdcd_simple.h" hdcd_new
4653 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
4654 enabled libkvazaar        && require_pkg_config "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
4655 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
4656 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
4657 enabled libnpp            && require libnpp npp.h nppGetLibVersion -lnppi -lnppc
4658 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
4659 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
4660 enabled libopencv         && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
4661 enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
4662 enabled libopenjpeg       && { check_lib libopenjpeg openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
4663                                require_pkg_config libopenjpeg1 openjpeg.h opj_version -DOPJ_STATIC; }
4664 enabled libopus           && require_pkg_config opus opus_multistream.h opus_multistream_decoder_create
4665 enabled libpulse          && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
4666 enabled librtmp           && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
4667 enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
4668 enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
4669 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex
4670 enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
4671 enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame
4672 enabled libvo_aacenc      && require libvo_aacenc vo-aacenc/voAAC.h voGetAACEncAPI -lvo-aacenc
4673 enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
4674 enabled libvorbis         && require libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
4675 enabled libvpx            && require_pkg_config "vpx >= 1.3.0" vpx/vpx_codec.h vpx_codec_version && {
4676     enabled libvpx_vp8_decoder && {
4677         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
4678             disable libvpx_vp8_decoder;
4679     }
4680     enabled libvpx_vp8_encoder && {
4681         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
4682             disable libvpx_vp8_encoder;
4683     }
4684     enabled libvpx_vp9_decoder && {
4685         check_pkg_config vpx "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
4686             disable libvpx_vp9_decoder;
4687     }
4688     enabled libvpx_vp9_encoder && {
4689         check_pkg_config vpx "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
4690             disable libvpx_vp9_encoder;
4691     }
4692     if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
4693         die "libvpx enabled but no supported decoders found"
4694     fi
4695 }
4696 enabled libwavpack        && require libwavpack wavpack/wavpack.h WavpackOpenFileOutput  -lwavpack
4697 enabled libwebp           && require_pkg_config libwebp webp/encode.h WebPGetEncoderVersion
4698 enabled libx264           && require_pkg_config x264 "stdint.h x264.h" x264_encoder_encode &&
4699                              { check_cpp_condition x264.h "X264_BUILD >= 118" ||
4700                                die "ERROR: libx264 version must be >= 0.118."; } &&
4701                              { check_cpp_condition x264.h "X264_MPEG2" &&
4702                                enable libx262; }
4703 enabled libx265           && require_pkg_config x265 x265.h x265_api_get &&
4704                              { check_cpp_condition x265.h "X265_BUILD >= 57" ||
4705                                die "ERROR: libx265 version must be >= 57."; }
4706 enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode -lxavs
4707 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
4708 enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
4709                                { ! enabled cross_compile &&
4710                                  add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
4711                                  add_ldflags -L/opt/vc/lib/ &&
4712                                  check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
4713                                die "ERROR: mmal not found" &&
4714                                check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
4715 enabled omx_rpi           && { check_header OMX_Core.h ||
4716                                { ! enabled cross_compile && add_cflags -isystem/opt/vc/include/IL && check_header OMX_Core.h ; } ||
4717                                die "ERROR: OpenMAX IL headers not found"; }
4718 enabled omx               && { check_header OMX_Core.h || die "ERROR: OpenMAX IL headers not found"; }
4719 enabled openssl           && { { check_pkg_config openssl openssl/ssl.h OPENSSL_init_ssl ||
4720                                  check_pkg_config openssl openssl/ssl.h SSL_library_init; } && {
4721                                add_cflags $openssl_cflags && add_extralibs $openssl_extralibs; } ||
4722                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
4723                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
4724                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
4725                                die "ERROR: openssl not found"; }
4726
4727 enabled gnutls            && check_lib gmp gmp.h mpz_export -lgmp
4728
4729 if enabled nvenc; then
4730     check_header nvEncodeAPI.h || die "ERROR: nvEncodeAPI.h not found."
4731     check_cpp_condition nvEncodeAPI.h "NVENCAPI_MAJOR_VERSION >= 6" ||
4732         die "ERROR: NVENC API version 5 or older is not supported"
4733 fi
4734
4735 if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
4736     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
4737     check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
4738     enable sdl
4739 fi
4740
4741 ! disabled pod2man   && check_cmd pod2man --help     && enable pod2man   || disable pod2man
4742 ! disabled texi2html && check_cmd texi2html -version && enable texi2html || disable texi2html
4743
4744 check_header linux/fb.h
4745 check_header linux/videodev2.h
4746 check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
4747
4748 check_header AVFoundation/AVFoundation.h
4749
4750 check_header sys/videoio.h
4751
4752 check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
4753 check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
4754 # check that WM_CAP_DRIVER_CONNECT is defined to the proper value
4755 # w32api 3.12 had it defined wrong
4756 check_cpp_condition vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER" && enable vfwcap_defines
4757
4758 # check for ioctl_meteor.h, ioctl_bt848.h and alternatives
4759 { check_header dev/bktr/ioctl_meteor.h &&
4760   check_header dev/bktr/ioctl_bt848.h; } ||
4761 { check_header machine/ioctl_meteor.h &&
4762   check_header machine/ioctl_bt848.h; } ||
4763 { check_header dev/video/meteor/ioctl_meteor.h &&
4764   check_header dev/video/bktr/ioctl_bt848.h; } ||
4765 check_header dev/ic/bt8xx.h
4766
4767 check_header sys/soundcard.h
4768 check_header soundcard.h
4769
4770 enabled_any alsa_indev alsa_outdev &&
4771     check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound
4772
4773 enabled jack_indev && check_lib jack jack/jack.h jack_client_open -ljack &&
4774     check_func jack_port_get_latency_range -ljack
4775
4776 enabled_any sndio_indev sndio_outdev && check_lib sndio sndio.h sio_open -lsndio
4777
4778 if enabled libcdio; then
4779     check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4780     check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
4781     die "ERROR: No usable libcdio/cdparanoia found"
4782 fi
4783
4784 if enabled libxcb; then
4785     check_pkg_config xcb-shape xcb/shape.h xcb_shape_rectangles || {
4786         enabled libxcb && die "ERROR: libxcb not found";
4787     } && enable libxcb
4788
4789     disabled libxcb_shm ||
4790         check_pkg_config xcb-shm xcb/shm.h xcb_shm_attach || {
4791             enabled libxcb_shm && die "ERROR: libxcb_shm not found";
4792         } && check_header sys/shm.h && enable libxcb_shm
4793
4794     disabled libxcb_xfixes ||
4795         check_pkg_config xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image || {
4796             enabled libxcb_xfixes && die "ERROR: libxcb_xfixes not found";
4797         } && enable libxcb_xfixes
4798
4799     add_cflags "$xcb_shape_cflags $xcb_shm_cflags $xcb_xfixes_cflags"
4800     add_extralibs "$xcb_shape_extralibs $xcb_shm_extralibs $xcb_xfixes_extralibs"
4801 fi
4802
4803 enabled dxva2 &&
4804     check_lib dxva2_lib windows.h CoTaskMemFree -lole32
4805
4806 enabled vaapi && require vaapi va/va.h vaInitialize -lva
4807
4808 enabled vaapi &&
4809     check_code cc "va/va.h" "vaCreateSurfaces(0, 0, 0, 0, 0, 0, 0, 0)" ||
4810     disable vaapi
4811
4812 enabled vaapi &&
4813     check_lib vaapi_drm "va/va.h va/va_drm.h" vaGetDisplayDRM -lva -lva-drm
4814
4815 enabled vaapi &&
4816     check_lib vaapi_x11 "va/va.h va/va_x11.h" vaGetDisplay -lva -lva-x11 -lX11
4817
4818 enabled vdpau &&
4819     check_cpp_condition vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP" ||
4820     disable vdpau
4821
4822 enabled vdpau &&
4823     check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
4824
4825 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
4826
4827 # add some useful compiler flags if supported
4828 check_cflags -Wdeclaration-after-statement
4829 check_cflags -Wall
4830 check_cflags -Wdisabled-optimization
4831 check_cflags -Wpointer-arith
4832 check_cflags -Wredundant-decls
4833 check_cflags -Wwrite-strings
4834 check_cflags -Wtype-limits
4835 check_cflags -Wundef
4836 check_cflags -Wmissing-prototypes
4837 check_cflags -Wstrict-prototypes
4838
4839 if enabled extra_warnings; then
4840     check_cflags -Wcast-qual
4841     check_cflags -Wextra
4842     che